* [Qemu-devel] [PULL 00/42] Block patches
@ 2013-09-06 15:38 Stefan Hajnoczi
2013-09-06 15:38 ` [Qemu-devel] [PULL 01/42] throttle: Add a new throttling API implementing continuous leaky bucket Stefan Hajnoczi
` (41 more replies)
0 siblings, 42 replies; 56+ messages in thread
From: Stefan Hajnoczi @ 2013-09-06 15:38 UTC (permalink / raw)
To: qemu-devel; +Cc: Stefan Hajnoczi, Anthony Liguori
A couple of patch series make this pull request large:
* Benoit Canet's new I/O throttling implementation
* Fam Zheng's BlockDriverState refcount
* Paolo Bonzini's get_block_status() and qemu-img map command
The following changes since commit df7131623daf4823e087eb1128f6c1c351519774:
Merge remote-tracking branch 'bonzini/iommu-for-anthony' into staging (2013-09-05 13:38:53 -0500)
are available in the git repository at:
git://github.com/stefanha/qemu.git block
for you to fetch changes up to 8f94b077877151de93a63c73f796897309568ddb:
qemu-iotests: Fixed test case 026 (2013-09-06 15:25:10 +0200)
----------------------------------------------------------------
Alex Bligh (1):
aio / timers: fix build of test/test-aio.c on non-linux platforms
Alexandre Derumier (1):
add qemu-img convert -n option (skip target volume creation)
Benoît Canet (5):
throttle: Add a new throttling API implementing continuous leaky bucket.
throttle: Add units tests
block: Enable the new throttling code in the block layer.
block: Add support for throttling burst max in QMP and the command line.
block: Add iops_size to do the iops accounting for a given io size.
Cornelia Huck (1):
dataplane: Fix startup race.
Fam Zheng (8):
vvfat: use bdrv_new() to allocate BlockDriverState
iscsi: use bdrv_new() instead of stack structure
block: implement reference count for BlockDriverState
block: make bdrv_delete() static
migration: omit drive ref as we have bdrv_ref now
xen_disk: simplify blk_disconnect with refcnt
nbd: use BlockDriverState refcnt
block: use BDS ref for block jobs
Kevin Wolf (2):
qemu-iotests: Whitespace cleanup
qemu-iotests: Fixed test case 026
Max Reitz (2):
qemu-iotests: Adjust test result 039
qmp: Documentation for BLOCK_IMAGE_CORRUPTED
Paolo Bonzini (21):
cow: make reads go at a decent speed
cow: make writes go at a less indecent speed
cow: do not call bdrv_co_is_allocated
block: keep bs->total_sectors up to date even for growable block devices
block: make bdrv_co_is_allocated static
block: do not use ->total_sectors in bdrv_co_is_allocated
block: remove bdrv_is_allocated_above/bdrv_co_is_allocated_above distinction
block: expect errors from bdrv_co_is_allocated
qemu-img: always probe the input image for allocated sectors
block: make bdrv_has_zero_init return false for copy-on-write-images
block: introduce bdrv_get_block_status API
block: define get_block_status return value
block: return get_block_status data and flags for formats
block: use bdrv_has_zero_init to return BDRV_BLOCK_ZERO
block: return BDRV_BLOCK_ZERO past end of backing file
qemu-img: add a "map" subcommand
docs, qapi: document qemu-img map
raw-posix: return get_block_status data and flags
raw-posix: report unwritten extents as zero
block: add default get_block_status implementation for protocols
block: look for zero blocks in bs->file
Stefan Weil (1):
w32: Fix access to host devices (regression)
QMP/qmp-events.txt | 22 ++
block-migration.c | 4 +-
block.c | 556 ++++++++++++++------------------
block/backup.c | 6 +-
block/blkverify.c | 4 +-
block/commit.c | 6 +-
block/cow.c | 93 ++++--
block/iscsi.c | 16 +-
block/mirror.c | 6 +-
block/qapi.c | 50 ++-
block/qcow.c | 15 +-
block/qcow2.c | 26 +-
block/qed.c | 41 ++-
block/raw-posix.c | 24 +-
block/raw-win32.c | 36 ++-
block/raw_bsd.c | 10 +-
block/sheepdog.c | 20 +-
block/snapshot.c | 2 +-
block/stream.c | 12 +-
block/vdi.c | 17 +-
block/vmdk.c | 33 +-
block/vvfat.c | 21 +-
blockdev-nbd.c | 10 +-
blockdev.c | 242 ++++++++------
blockjob.c | 1 +
hmp.c | 36 ++-
hw/block/dataplane/virtio-blk.c | 9 +
hw/block/xen_disk.c | 13 +-
include/block/block.h | 38 ++-
include/block/block_int.h | 35 +--
include/qemu/throttle.h | 110 +++++++
nbd.c | 5 +
qapi-schema.json | 69 +++-
qemu-img-cmds.hx | 10 +-
qemu-img.c | 317 ++++++++++++++++---
qemu-img.texi | 70 ++++-
qemu-io-cmds.c | 4 +
qemu-io.c | 6 +-
qemu-options.hx | 6 +-
qmp-commands.hx | 32 +-
tests/Makefile | 2 +
tests/qemu-iotests/026.out | 28 +-
tests/qemu-iotests/026.out.nocache | 626 +++++++++++++++++++++++++++++++++++++
tests/qemu-iotests/039.out | 4 +-
tests/qemu-iotests/063 | 97 ++++++
tests/qemu-iotests/063.out | 10 +
tests/qemu-iotests/check | 240 +++++++-------
tests/qemu-iotests/common | 422 ++++++++++++-------------
tests/qemu-iotests/common.config | 6 +-
tests/qemu-iotests/common.filter | 42 +--
tests/qemu-iotests/common.pattern | 4 +-
tests/qemu-iotests/common.rc | 92 +++---
tests/qemu-iotests/group | 1 +
tests/test-aio.c | 11 +-
tests/test-throttle.c | 481 ++++++++++++++++++++++++++++
util/Makefile.objs | 1 +
util/throttle.c | 396 +++++++++++++++++++++++
57 files changed, 3407 insertions(+), 1089 deletions(-)
create mode 100644 include/qemu/throttle.h
create mode 100644 tests/qemu-iotests/026.out.nocache
create mode 100755 tests/qemu-iotests/063
create mode 100644 tests/qemu-iotests/063.out
create mode 100644 tests/test-throttle.c
create mode 100644 util/throttle.c
--
1.8.3.1
^ permalink raw reply [flat|nested] 56+ messages in thread
* [Qemu-devel] [PULL 01/42] throttle: Add a new throttling API implementing continuous leaky bucket.
2013-09-06 15:38 [Qemu-devel] [PULL 00/42] Block patches Stefan Hajnoczi
@ 2013-09-06 15:38 ` Stefan Hajnoczi
2013-09-06 15:38 ` [Qemu-devel] [PULL 02/42] throttle: Add units tests Stefan Hajnoczi
` (40 subsequent siblings)
41 siblings, 0 replies; 56+ messages in thread
From: Stefan Hajnoczi @ 2013-09-06 15:38 UTC (permalink / raw)
To: qemu-devel; +Cc: Stefan Hajnoczi, Benoît Canet, Anthony Liguori
From: Benoît Canet <benoit@irqsave.net>
Implement the continuous leaky bucket algorithm devised on IRC as a separate
module.
Signed-off-by: Benoit Canet <benoit@irqsave.net>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
include/qemu/throttle.h | 110 ++++++++++++++
util/Makefile.objs | 1 +
util/throttle.c | 396 ++++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 507 insertions(+)
create mode 100644 include/qemu/throttle.h
create mode 100644 util/throttle.c
diff --git a/include/qemu/throttle.h b/include/qemu/throttle.h
new file mode 100644
index 0000000..ab29b0b
--- /dev/null
+++ b/include/qemu/throttle.h
@@ -0,0 +1,110 @@
+/*
+ * QEMU throttling infrastructure
+ *
+ * Copyright (C) Nodalink, SARL. 2013
+ *
+ * Author:
+ * Benoît Canet <benoit.canet@irqsave.net>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 or
+ * (at your option) version 3 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef THROTTLE_H
+#define THROTTLE_H
+
+#include <stdint.h>
+#include "qemu-common.h"
+#include "qemu/timer.h"
+
+#define NANOSECONDS_PER_SECOND 1000000000.0
+
+typedef enum {
+ THROTTLE_BPS_TOTAL,
+ THROTTLE_BPS_READ,
+ THROTTLE_BPS_WRITE,
+ THROTTLE_OPS_TOTAL,
+ THROTTLE_OPS_READ,
+ THROTTLE_OPS_WRITE,
+ BUCKETS_COUNT,
+} BucketType;
+
+/*
+ * The max parameter of the leaky bucket throttling algorithm can be used to
+ * allow the guest to do bursts.
+ * The max value is a pool of I/O that the guest can use without being throttled
+ * at all. Throttling is triggered once this pool is empty.
+ */
+
+typedef struct LeakyBucket {
+ double avg; /* average goal in units per second */
+ double max; /* leaky bucket max burst in units */
+ double level; /* bucket level in units */
+} LeakyBucket;
+
+/* The following structure is used to configure a ThrottleState
+ * It contains a bit of state: the bucket field of the LeakyBucket structure.
+ * However it allows to keep the code clean and the bucket field is reset to
+ * zero at the right time.
+ */
+typedef struct ThrottleConfig {
+ LeakyBucket buckets[BUCKETS_COUNT]; /* leaky buckets */
+ uint64_t op_size; /* size of an operation in bytes */
+} ThrottleConfig;
+
+typedef struct ThrottleState {
+ ThrottleConfig cfg; /* configuration */
+ int64_t previous_leak; /* timestamp of the last leak done */
+ QEMUTimer * timers[2]; /* timers used to do the throttling */
+ QEMUClockType clock_type; /* the clock used */
+} ThrottleState;
+
+/* operations on single leaky buckets */
+void throttle_leak_bucket(LeakyBucket *bkt, int64_t delta);
+
+int64_t throttle_compute_wait(LeakyBucket *bkt);
+
+/* expose timer computation function for unit tests */
+bool throttle_compute_timer(ThrottleState *ts,
+ bool is_write,
+ int64_t now,
+ int64_t *next_timestamp);
+
+/* init/destroy cycle */
+void throttle_init(ThrottleState *ts,
+ QEMUClockType clock_type,
+ void (read_timer)(void *),
+ void (write_timer)(void *),
+ void *timer_opaque);
+
+void throttle_destroy(ThrottleState *ts);
+
+bool throttle_have_timer(ThrottleState *ts);
+
+/* configuration */
+bool throttle_enabled(ThrottleConfig *cfg);
+
+bool throttle_conflicting(ThrottleConfig *cfg);
+
+bool throttle_is_valid(ThrottleConfig *cfg);
+
+void throttle_config(ThrottleState *ts, ThrottleConfig *cfg);
+
+void throttle_get_config(ThrottleState *ts, ThrottleConfig *cfg);
+
+/* usage */
+bool throttle_schedule_timer(ThrottleState *ts, bool is_write);
+
+void throttle_account(ThrottleState *ts, bool is_write, uint64_t size);
+
+#endif
diff --git a/util/Makefile.objs b/util/Makefile.objs
index dc72ab0..2bb13a2 100644
--- a/util/Makefile.objs
+++ b/util/Makefile.objs
@@ -11,3 +11,4 @@ util-obj-y += iov.o aes.o qemu-config.o qemu-sockets.o uri.o notify.o
util-obj-y += qemu-option.o qemu-progress.o
util-obj-y += hexdump.o
util-obj-y += crc32c.o
+util-obj-y += throttle.o
diff --git a/util/throttle.c b/util/throttle.c
new file mode 100644
index 0000000..02e6f15
--- /dev/null
+++ b/util/throttle.c
@@ -0,0 +1,396 @@
+/*
+ * QEMU throttling infrastructure
+ *
+ * Copyright (C) Nodalink, SARL. 2013
+ *
+ * Author:
+ * Benoît Canet <benoit.canet@irqsave.net>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 or
+ * (at your option) version 3 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "qemu/throttle.h"
+#include "qemu/timer.h"
+
+/* This function make a bucket leak
+ *
+ * @bkt: the bucket to make leak
+ * @delta_ns: the time delta
+ */
+void throttle_leak_bucket(LeakyBucket *bkt, int64_t delta_ns)
+{
+ double leak;
+
+ /* compute how much to leak */
+ leak = (bkt->avg * (double) delta_ns) / NANOSECONDS_PER_SECOND;
+
+ /* make the bucket leak */
+ bkt->level = MAX(bkt->level - leak, 0);
+}
+
+/* Calculate the time delta since last leak and make proportionals leaks
+ *
+ * @now: the current timestamp in ns
+ */
+static void throttle_do_leak(ThrottleState *ts, int64_t now)
+{
+ /* compute the time elapsed since the last leak */
+ int64_t delta_ns = now - ts->previous_leak;
+ int i;
+
+ ts->previous_leak = now;
+
+ if (delta_ns <= 0) {
+ return;
+ }
+
+ /* make each bucket leak */
+ for (i = 0; i < BUCKETS_COUNT; i++) {
+ throttle_leak_bucket(&ts->cfg.buckets[i], delta_ns);
+ }
+}
+
+/* do the real job of computing the time to wait
+ *
+ * @limit: the throttling limit
+ * @extra: the number of operation to delay
+ * @ret: the time to wait in ns
+ */
+static int64_t throttle_do_compute_wait(double limit, double extra)
+{
+ double wait = extra * NANOSECONDS_PER_SECOND;
+ wait /= limit;
+ return wait;
+}
+
+/* This function compute the wait time in ns that a leaky bucket should trigger
+ *
+ * @bkt: the leaky bucket we operate on
+ * @ret: the resulting wait time in ns or 0 if the operation can go through
+ */
+int64_t throttle_compute_wait(LeakyBucket *bkt)
+{
+ double extra; /* the number of extra units blocking the io */
+
+ if (!bkt->avg) {
+ return 0;
+ }
+
+ extra = bkt->level - bkt->max;
+
+ if (extra <= 0) {
+ return 0;
+ }
+
+ return throttle_do_compute_wait(bkt->avg, extra);
+}
+
+/* This function compute the time that must be waited while this IO
+ *
+ * @is_write: true if the current IO is a write, false if it's a read
+ * @ret: time to wait
+ */
+static int64_t throttle_compute_wait_for(ThrottleState *ts,
+ bool is_write)
+{
+ BucketType to_check[2][4] = { {THROTTLE_BPS_TOTAL,
+ THROTTLE_OPS_TOTAL,
+ THROTTLE_BPS_READ,
+ THROTTLE_OPS_READ},
+ {THROTTLE_BPS_TOTAL,
+ THROTTLE_OPS_TOTAL,
+ THROTTLE_BPS_WRITE,
+ THROTTLE_OPS_WRITE}, };
+ int64_t wait, max_wait = 0;
+ int i;
+
+ for (i = 0; i < 4; i++) {
+ BucketType index = to_check[is_write][i];
+ wait = throttle_compute_wait(&ts->cfg.buckets[index]);
+ if (wait > max_wait) {
+ max_wait = wait;
+ }
+ }
+
+ return max_wait;
+}
+
+/* compute the timer for this type of operation
+ *
+ * @is_write: the type of operation
+ * @now: the current clock timestamp
+ * @next_timestamp: the resulting timer
+ * @ret: true if a timer must be set
+ */
+bool throttle_compute_timer(ThrottleState *ts,
+ bool is_write,
+ int64_t now,
+ int64_t *next_timestamp)
+{
+ int64_t wait;
+
+ /* leak proportionally to the time elapsed */
+ throttle_do_leak(ts, now);
+
+ /* compute the wait time if any */
+ wait = throttle_compute_wait_for(ts, is_write);
+
+ /* if the code must wait compute when the next timer should fire */
+ if (wait) {
+ *next_timestamp = now + wait;
+ return true;
+ }
+
+ /* else no need to wait at all */
+ *next_timestamp = now;
+ return false;
+}
+
+/* To be called first on the ThrottleState */
+void throttle_init(ThrottleState *ts,
+ QEMUClockType clock_type,
+ QEMUTimerCB *read_timer_cb,
+ QEMUTimerCB *write_timer_cb,
+ void *timer_opaque)
+{
+ memset(ts, 0, sizeof(ThrottleState));
+
+ ts->clock_type = clock_type;
+ ts->timers[0] = timer_new_ns(clock_type, read_timer_cb, timer_opaque);
+ ts->timers[1] = timer_new_ns(clock_type, write_timer_cb, timer_opaque);
+}
+
+/* destroy a timer */
+static void throttle_timer_destroy(QEMUTimer **timer)
+{
+ assert(*timer != NULL);
+
+ timer_del(*timer);
+ timer_free(*timer);
+ *timer = NULL;
+}
+
+/* To be called last on the ThrottleState */
+void throttle_destroy(ThrottleState *ts)
+{
+ int i;
+
+ for (i = 0; i < 2; i++) {
+ throttle_timer_destroy(&ts->timers[i]);
+ }
+}
+
+/* is any throttling timer configured */
+bool throttle_have_timer(ThrottleState *ts)
+{
+ if (ts->timers[0]) {
+ return true;
+ }
+
+ return false;
+}
+
+/* Does any throttling must be done
+ *
+ * @cfg: the throttling configuration to inspect
+ * @ret: true if throttling must be done else false
+ */
+bool throttle_enabled(ThrottleConfig *cfg)
+{
+ int i;
+
+ for (i = 0; i < BUCKETS_COUNT; i++) {
+ if (cfg->buckets[i].avg > 0) {
+ return true;
+ }
+ }
+
+ return false;
+}
+
+/* return true if any two throttling parameters conflicts
+ *
+ * @cfg: the throttling configuration to inspect
+ * @ret: true if any conflict detected else false
+ */
+bool throttle_conflicting(ThrottleConfig *cfg)
+{
+ bool bps_flag, ops_flag;
+ bool bps_max_flag, ops_max_flag;
+
+ bps_flag = cfg->buckets[THROTTLE_BPS_TOTAL].avg &&
+ (cfg->buckets[THROTTLE_BPS_READ].avg ||
+ cfg->buckets[THROTTLE_BPS_WRITE].avg);
+
+ ops_flag = cfg->buckets[THROTTLE_OPS_TOTAL].avg &&
+ (cfg->buckets[THROTTLE_OPS_READ].avg ||
+ cfg->buckets[THROTTLE_OPS_WRITE].avg);
+
+ bps_max_flag = cfg->buckets[THROTTLE_BPS_TOTAL].max &&
+ (cfg->buckets[THROTTLE_BPS_READ].max ||
+ cfg->buckets[THROTTLE_BPS_WRITE].max);
+
+ ops_max_flag = cfg->buckets[THROTTLE_OPS_TOTAL].max &&
+ (cfg->buckets[THROTTLE_OPS_READ].max ||
+ cfg->buckets[THROTTLE_OPS_WRITE].max);
+
+ return bps_flag || ops_flag || bps_max_flag || ops_max_flag;
+}
+
+/* check if a throttling configuration is valid
+ * @cfg: the throttling configuration to inspect
+ * @ret: true if valid else false
+ */
+bool throttle_is_valid(ThrottleConfig *cfg)
+{
+ bool invalid = false;
+ int i;
+
+ for (i = 0; i < BUCKETS_COUNT; i++) {
+ if (cfg->buckets[i].avg < 0) {
+ invalid = true;
+ }
+ }
+
+ for (i = 0; i < BUCKETS_COUNT; i++) {
+ if (cfg->buckets[i].max < 0) {
+ invalid = true;
+ }
+ }
+
+ return !invalid;
+}
+
+/* fix bucket parameters */
+static void throttle_fix_bucket(LeakyBucket *bkt)
+{
+ double min;
+
+ /* zero bucket level */
+ bkt->level = 0;
+
+ /* The following is done to cope with the Linux CFQ block scheduler
+ * which regroup reads and writes by block of 100ms in the guest.
+ * When they are two process one making reads and one making writes cfq
+ * make a pattern looking like the following:
+ * WWWWWWWWWWWRRRRRRRRRRRRRRWWWWWWWWWWWWWwRRRRRRRRRRRRRRRRR
+ * Having a max burst value of 100ms of the average will help smooth the
+ * throttling
+ */
+ min = bkt->avg / 10;
+ if (bkt->avg && !bkt->max) {
+ bkt->max = min;
+ }
+}
+
+/* take care of canceling a timer */
+static void throttle_cancel_timer(QEMUTimer *timer)
+{
+ assert(timer != NULL);
+
+ timer_del(timer);
+}
+
+/* Used to configure the throttle
+ *
+ * @ts: the throttle state we are working on
+ * @cfg: the config to set
+ */
+void throttle_config(ThrottleState *ts, ThrottleConfig *cfg)
+{
+ int i;
+
+ ts->cfg = *cfg;
+
+ for (i = 0; i < BUCKETS_COUNT; i++) {
+ throttle_fix_bucket(&ts->cfg.buckets[i]);
+ }
+
+ ts->previous_leak = qemu_clock_get_ns(ts->clock_type);
+
+ for (i = 0; i < 2; i++) {
+ throttle_cancel_timer(ts->timers[i]);
+ }
+}
+
+/* used to get config
+ *
+ * @ts: the throttle state we are working on
+ * @cfg: the config to write
+ */
+void throttle_get_config(ThrottleState *ts, ThrottleConfig *cfg)
+{
+ *cfg = ts->cfg;
+}
+
+
+/* Schedule the read or write timer if needed
+ *
+ * NOTE: this function is not unit tested due to it's usage of timer_mod
+ *
+ * @is_write: the type of operation (read/write)
+ * @ret: true if the timer has been scheduled else false
+ */
+bool throttle_schedule_timer(ThrottleState *ts, bool is_write)
+{
+ int64_t now = qemu_clock_get_ns(ts->clock_type);
+ int64_t next_timestamp;
+ bool must_wait;
+
+ must_wait = throttle_compute_timer(ts,
+ is_write,
+ now,
+ &next_timestamp);
+
+ /* request not throttled */
+ if (!must_wait) {
+ return false;
+ }
+
+ /* request throttled and timer pending -> do nothing */
+ if (timer_pending(ts->timers[is_write])) {
+ return true;
+ }
+
+ /* request throttled and timer not pending -> arm timer */
+ timer_mod(ts->timers[is_write], next_timestamp);
+ return true;
+}
+
+/* do the accounting for this operation
+ *
+ * @is_write: the type of operation (read/write)
+ * @size: the size of the operation
+ */
+void throttle_account(ThrottleState *ts, bool is_write, uint64_t size)
+{
+ double units = 1.0;
+
+ /* if cfg.op_size is defined and smaller than size we compute unit count */
+ if (ts->cfg.op_size && size > ts->cfg.op_size) {
+ units = (double) size / ts->cfg.op_size;
+ }
+
+ ts->cfg.buckets[THROTTLE_BPS_TOTAL].level += size;
+ ts->cfg.buckets[THROTTLE_OPS_TOTAL].level += units;
+
+ if (is_write) {
+ ts->cfg.buckets[THROTTLE_BPS_WRITE].level += size;
+ ts->cfg.buckets[THROTTLE_OPS_WRITE].level += units;
+ } else {
+ ts->cfg.buckets[THROTTLE_BPS_READ].level += size;
+ ts->cfg.buckets[THROTTLE_OPS_READ].level += units;
+ }
+}
+
--
1.8.3.1
^ permalink raw reply related [flat|nested] 56+ messages in thread
* [Qemu-devel] [PULL 02/42] throttle: Add units tests
2013-09-06 15:38 [Qemu-devel] [PULL 00/42] Block patches Stefan Hajnoczi
2013-09-06 15:38 ` [Qemu-devel] [PULL 01/42] throttle: Add a new throttling API implementing continuous leaky bucket Stefan Hajnoczi
@ 2013-09-06 15:38 ` Stefan Hajnoczi
2013-09-06 15:38 ` [Qemu-devel] [PULL 03/42] block: Enable the new throttling code in the block layer Stefan Hajnoczi
` (39 subsequent siblings)
41 siblings, 0 replies; 56+ messages in thread
From: Stefan Hajnoczi @ 2013-09-06 15:38 UTC (permalink / raw)
To: qemu-devel; +Cc: Stefan Hajnoczi, Benoît Canet, Anthony Liguori
From: Benoît Canet <benoit@irqsave.net>
Signed-off-by: Benoit Canet <benoit@irqsave.net>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
tests/Makefile | 2 +
tests/test-throttle.c | 481 ++++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 483 insertions(+)
create mode 100644 tests/test-throttle.c
diff --git a/tests/Makefile b/tests/Makefile
index baba9e9..c13fefc 100644
--- a/tests/Makefile
+++ b/tests/Makefile
@@ -31,6 +31,7 @@ check-unit-y += tests/test-visitor-serialization$(EXESUF)
check-unit-y += tests/test-iov$(EXESUF)
gcov-files-test-iov-y = util/iov.c
check-unit-y += tests/test-aio$(EXESUF)
+check-unit-y += tests/test-throttle$(EXESUF)
gcov-files-test-aio-$(CONFIG_WIN32) = aio-win32.c
gcov-files-test-aio-$(CONFIG_POSIX) = aio-posix.c
check-unit-y += tests/test-thread-pool$(EXESUF)
@@ -120,6 +121,7 @@ tests/check-qfloat$(EXESUF): tests/check-qfloat.o libqemuutil.a
tests/check-qjson$(EXESUF): tests/check-qjson.o libqemuutil.a libqemustub.a
tests/test-coroutine$(EXESUF): tests/test-coroutine.o $(block-obj-y) libqemuutil.a libqemustub.a
tests/test-aio$(EXESUF): tests/test-aio.o $(block-obj-y) libqemuutil.a libqemustub.a
+tests/test-throttle$(EXESUF): tests/test-throttle.o $(block-obj-y) libqemuutil.a libqemustub.a
tests/test-thread-pool$(EXESUF): tests/test-thread-pool.o $(block-obj-y) libqemuutil.a libqemustub.a
tests/test-iov$(EXESUF): tests/test-iov.o libqemuutil.a
tests/test-hbitmap$(EXESUF): tests/test-hbitmap.o libqemuutil.a libqemustub.a
diff --git a/tests/test-throttle.c b/tests/test-throttle.c
new file mode 100644
index 0000000..7608126
--- /dev/null
+++ b/tests/test-throttle.c
@@ -0,0 +1,481 @@
+/*
+ * Throttle infrastructure tests
+ *
+ * Copyright Nodalink, SARL. 2013
+ *
+ * Authors:
+ * Benoît Canet <benoit.canet@irqsave.net>
+ *
+ * This work is licensed under the terms of the GNU LGPL, version 2 or later.
+ * See the COPYING.LIB file in the top-level directory.
+ */
+
+#include <glib.h>
+#include <math.h>
+#include "qemu/throttle.h"
+
+LeakyBucket bkt;
+ThrottleConfig cfg;
+ThrottleState ts;
+
+/* usefull function */
+static bool double_cmp(double x, double y)
+{
+ return fabsl(x - y) < 1e-6;
+}
+
+/* tests for single bucket operations */
+static void test_leak_bucket(void)
+{
+ /* set initial value */
+ bkt.avg = 150;
+ bkt.max = 15;
+ bkt.level = 1.5;
+
+ /* leak an op work of time */
+ throttle_leak_bucket(&bkt, NANOSECONDS_PER_SECOND / 150);
+ g_assert(bkt.avg == 150);
+ g_assert(bkt.max == 15);
+ g_assert(double_cmp(bkt.level, 0.5));
+
+ /* leak again emptying the bucket */
+ throttle_leak_bucket(&bkt, NANOSECONDS_PER_SECOND / 150);
+ g_assert(bkt.avg == 150);
+ g_assert(bkt.max == 15);
+ g_assert(double_cmp(bkt.level, 0));
+
+ /* check that the bucket level won't go lower */
+ throttle_leak_bucket(&bkt, NANOSECONDS_PER_SECOND / 150);
+ g_assert(bkt.avg == 150);
+ g_assert(bkt.max == 15);
+ g_assert(double_cmp(bkt.level, 0));
+}
+
+static void test_compute_wait(void)
+{
+ int64_t wait;
+ int64_t result;
+
+ /* no operation limit set */
+ bkt.avg = 0;
+ bkt.max = 15;
+ bkt.level = 1.5;
+ wait = throttle_compute_wait(&bkt);
+ g_assert(!wait);
+
+ /* zero delta */
+ bkt.avg = 150;
+ bkt.max = 15;
+ bkt.level = 15;
+ wait = throttle_compute_wait(&bkt);
+ g_assert(!wait);
+
+ /* below zero delta */
+ bkt.avg = 150;
+ bkt.max = 15;
+ bkt.level = 9;
+ wait = throttle_compute_wait(&bkt);
+ g_assert(!wait);
+
+ /* half an operation above max */
+ bkt.avg = 150;
+ bkt.max = 15;
+ bkt.level = 15.5;
+ wait = throttle_compute_wait(&bkt);
+ /* time required to do half an operation */
+ result = (int64_t) NANOSECONDS_PER_SECOND / 150 / 2;
+ g_assert(wait == result);
+}
+
+/* functions to test ThrottleState initialization/destroy methods */
+static void read_timer_cb(void *opaque)
+{
+}
+
+static void write_timer_cb(void *opaque)
+{
+}
+
+static void test_init(void)
+{
+ int i;
+
+ /* fill the structure with crap */
+ memset(&ts, 1, sizeof(ts));
+
+ /* init the structure */
+ throttle_init(&ts, QEMU_CLOCK_VIRTUAL, read_timer_cb, write_timer_cb, &ts);
+
+ /* check initialized fields */
+ g_assert(ts.clock_type == QEMU_CLOCK_VIRTUAL);
+ g_assert(ts.timers[0]);
+ g_assert(ts.timers[1]);
+
+ /* check other fields where cleared */
+ g_assert(!ts.previous_leak);
+ g_assert(!ts.cfg.op_size);
+ for (i = 0; i < BUCKETS_COUNT; i++) {
+ g_assert(!ts.cfg.buckets[i].avg);
+ g_assert(!ts.cfg.buckets[i].max);
+ g_assert(!ts.cfg.buckets[i].level);
+ }
+
+ throttle_destroy(&ts);
+}
+
+static void test_destroy(void)
+{
+ int i;
+ throttle_init(&ts, QEMU_CLOCK_VIRTUAL, read_timer_cb, write_timer_cb, &ts);
+ throttle_destroy(&ts);
+ for (i = 0; i < 2; i++) {
+ g_assert(!ts.timers[i]);
+ }
+}
+
+/* function to test throttle_config and throttle_get_config */
+static void test_config_functions(void)
+{
+ int i;
+ ThrottleConfig orig_cfg, final_cfg;
+
+ orig_cfg.buckets[THROTTLE_BPS_TOTAL].avg = 153;
+ orig_cfg.buckets[THROTTLE_BPS_READ].avg = 56;
+ orig_cfg.buckets[THROTTLE_BPS_WRITE].avg = 1;
+
+ orig_cfg.buckets[THROTTLE_OPS_TOTAL].avg = 150;
+ orig_cfg.buckets[THROTTLE_OPS_READ].avg = 69;
+ orig_cfg.buckets[THROTTLE_OPS_WRITE].avg = 23;
+
+ orig_cfg.buckets[THROTTLE_BPS_TOTAL].max = 0; /* should be corrected */
+ orig_cfg.buckets[THROTTLE_BPS_READ].max = 1; /* should not be corrected */
+ orig_cfg.buckets[THROTTLE_BPS_WRITE].max = 120;
+
+ orig_cfg.buckets[THROTTLE_OPS_TOTAL].max = 150;
+ orig_cfg.buckets[THROTTLE_OPS_READ].max = 400;
+ orig_cfg.buckets[THROTTLE_OPS_WRITE].max = 500;
+
+ orig_cfg.buckets[THROTTLE_BPS_TOTAL].level = 45;
+ orig_cfg.buckets[THROTTLE_BPS_READ].level = 65;
+ orig_cfg.buckets[THROTTLE_BPS_WRITE].level = 23;
+
+ orig_cfg.buckets[THROTTLE_OPS_TOTAL].level = 1;
+ orig_cfg.buckets[THROTTLE_OPS_READ].level = 90;
+ orig_cfg.buckets[THROTTLE_OPS_WRITE].level = 75;
+
+ orig_cfg.op_size = 1;
+
+ throttle_init(&ts, QEMU_CLOCK_VIRTUAL, read_timer_cb, write_timer_cb, &ts);
+ /* structure reset by throttle_init previous_leak should be null */
+ g_assert(!ts.previous_leak);
+ throttle_config(&ts, &orig_cfg);
+
+ /* has previous leak been initialized by throttle_config ? */
+ g_assert(ts.previous_leak);
+
+ /* get back the fixed configuration */
+ throttle_get_config(&ts, &final_cfg);
+
+ throttle_destroy(&ts);
+
+ g_assert(final_cfg.buckets[THROTTLE_BPS_TOTAL].avg == 153);
+ g_assert(final_cfg.buckets[THROTTLE_BPS_READ].avg == 56);
+ g_assert(final_cfg.buckets[THROTTLE_BPS_WRITE].avg == 1);
+
+ g_assert(final_cfg.buckets[THROTTLE_OPS_TOTAL].avg == 150);
+ g_assert(final_cfg.buckets[THROTTLE_OPS_READ].avg == 69);
+ g_assert(final_cfg.buckets[THROTTLE_OPS_WRITE].avg == 23);
+
+ g_assert(final_cfg.buckets[THROTTLE_BPS_TOTAL].max == 15.3);/* fixed */
+ g_assert(final_cfg.buckets[THROTTLE_BPS_READ].max == 1); /* not fixed */
+ g_assert(final_cfg.buckets[THROTTLE_BPS_WRITE].max == 120);
+
+ g_assert(final_cfg.buckets[THROTTLE_OPS_TOTAL].max == 150);
+ g_assert(final_cfg.buckets[THROTTLE_OPS_READ].max == 400);
+ g_assert(final_cfg.buckets[THROTTLE_OPS_WRITE].max == 500);
+
+ g_assert(final_cfg.op_size == 1);
+
+ /* check bucket have been cleared */
+ for (i = 0; i < BUCKETS_COUNT; i++) {
+ g_assert(!final_cfg.buckets[i].level);
+ }
+}
+
+/* functions to test is throttle is enabled by a config */
+static void set_cfg_value(bool is_max, int index, int value)
+{
+ if (is_max) {
+ cfg.buckets[index].max = value;
+ } else {
+ cfg.buckets[index].avg = value;
+ }
+}
+
+static void test_enabled(void)
+{
+ int i;
+
+ memset(&cfg, 0, sizeof(cfg));
+ g_assert(!throttle_enabled(&cfg));
+
+ for (i = 0; i < BUCKETS_COUNT; i++) {
+ memset(&cfg, 0, sizeof(cfg));
+ set_cfg_value(false, i, 150);
+ g_assert(throttle_enabled(&cfg));
+ }
+
+ for (i = 0; i < BUCKETS_COUNT; i++) {
+ memset(&cfg, 0, sizeof(cfg));
+ set_cfg_value(false, i, -150);
+ g_assert(!throttle_enabled(&cfg));
+ }
+}
+
+/* tests functions for throttle_conflicting */
+
+static void test_conflicts_for_one_set(bool is_max,
+ int total,
+ int read,
+ int write)
+{
+ memset(&cfg, 0, sizeof(cfg));
+ g_assert(!throttle_conflicting(&cfg));
+
+ set_cfg_value(is_max, total, 1);
+ set_cfg_value(is_max, read, 1);
+ g_assert(throttle_conflicting(&cfg));
+
+ memset(&cfg, 0, sizeof(cfg));
+ set_cfg_value(is_max, total, 1);
+ set_cfg_value(is_max, write, 1);
+ g_assert(throttle_conflicting(&cfg));
+
+ memset(&cfg, 0, sizeof(cfg));
+ set_cfg_value(is_max, total, 1);
+ set_cfg_value(is_max, read, 1);
+ set_cfg_value(is_max, write, 1);
+ g_assert(throttle_conflicting(&cfg));
+
+ memset(&cfg, 0, sizeof(cfg));
+ set_cfg_value(is_max, total, 1);
+ g_assert(!throttle_conflicting(&cfg));
+
+ memset(&cfg, 0, sizeof(cfg));
+ set_cfg_value(is_max, read, 1);
+ set_cfg_value(is_max, write, 1);
+ g_assert(!throttle_conflicting(&cfg));
+}
+
+static void test_conflicting_config(void)
+{
+ /* bps average conflicts */
+ test_conflicts_for_one_set(false,
+ THROTTLE_BPS_TOTAL,
+ THROTTLE_BPS_READ,
+ THROTTLE_BPS_WRITE);
+
+ /* ops average conflicts */
+ test_conflicts_for_one_set(false,
+ THROTTLE_OPS_TOTAL,
+ THROTTLE_OPS_READ,
+ THROTTLE_OPS_WRITE);
+
+ /* bps average conflicts */
+ test_conflicts_for_one_set(true,
+ THROTTLE_BPS_TOTAL,
+ THROTTLE_BPS_READ,
+ THROTTLE_BPS_WRITE);
+ /* ops average conflicts */
+ test_conflicts_for_one_set(true,
+ THROTTLE_OPS_TOTAL,
+ THROTTLE_OPS_READ,
+ THROTTLE_OPS_WRITE);
+}
+/* functions to test the throttle_is_valid function */
+static void test_is_valid_for_value(int value, bool should_be_valid)
+{
+ int is_max, index;
+ for (is_max = 0; is_max < 2; is_max++) {
+ for (index = 0; index < BUCKETS_COUNT; index++) {
+ memset(&cfg, 0, sizeof(cfg));
+ set_cfg_value(is_max, index, value);
+ g_assert(throttle_is_valid(&cfg) == should_be_valid);
+ }
+ }
+}
+
+static void test_is_valid(void)
+{
+ /* negative number are invalid */
+ test_is_valid_for_value(-1, false);
+ /* zero are valids */
+ test_is_valid_for_value(0, true);
+ /* positives numers are valids */
+ test_is_valid_for_value(1, true);
+}
+
+static void test_have_timer(void)
+{
+ /* zero the structure */
+ memset(&ts, 0, sizeof(ts));
+
+ /* no timer set shoudl return false */
+ g_assert(!throttle_have_timer(&ts));
+
+ /* init the structure */
+ throttle_init(&ts, QEMU_CLOCK_VIRTUAL, read_timer_cb, write_timer_cb, &ts);
+
+ /* timer set by init should return true */
+ g_assert(throttle_have_timer(&ts));
+
+ throttle_destroy(&ts);
+}
+
+static bool do_test_accounting(bool is_ops, /* are we testing bps or ops */
+ int size, /* size of the operation to do */
+ double avg, /* io limit */
+ uint64_t op_size, /* ideal size of an io */
+ double total_result,
+ double read_result,
+ double write_result)
+{
+ BucketType to_test[2][3] = { { THROTTLE_BPS_TOTAL,
+ THROTTLE_BPS_READ,
+ THROTTLE_BPS_WRITE, },
+ { THROTTLE_OPS_TOTAL,
+ THROTTLE_OPS_READ,
+ THROTTLE_OPS_WRITE, } };
+ ThrottleConfig cfg;
+ BucketType index;
+ int i;
+
+ for (i = 0; i < 3; i++) {
+ BucketType index = to_test[is_ops][i];
+ cfg.buckets[index].avg = avg;
+ }
+
+ cfg.op_size = op_size;
+
+ throttle_init(&ts, QEMU_CLOCK_VIRTUAL, read_timer_cb, write_timer_cb, &ts);
+ throttle_config(&ts, &cfg);
+
+ /* account a read */
+ throttle_account(&ts, false, size);
+ /* account a write */
+ throttle_account(&ts, true, size);
+
+ /* check total result */
+ index = to_test[is_ops][0];
+ if (!double_cmp(ts.cfg.buckets[index].level, total_result)) {
+ return false;
+ }
+
+ /* check read result */
+ index = to_test[is_ops][1];
+ if (!double_cmp(ts.cfg.buckets[index].level, read_result)) {
+ return false;
+ }
+
+ /* check write result */
+ index = to_test[is_ops][2];
+ if (!double_cmp(ts.cfg.buckets[index].level, write_result)) {
+ return false;
+ }
+
+ throttle_destroy(&ts);
+
+ return true;
+}
+
+static void test_accounting(void)
+{
+ /* tests for bps */
+
+ /* op of size 1 */
+ g_assert(do_test_accounting(false,
+ 1 * 512,
+ 150,
+ 0,
+ 1024,
+ 512,
+ 512));
+
+ /* op of size 2 */
+ g_assert(do_test_accounting(false,
+ 2 * 512,
+ 150,
+ 0,
+ 2048,
+ 1024,
+ 1024));
+
+ /* op of size 2 and orthogonal parameter change */
+ g_assert(do_test_accounting(false,
+ 2 * 512,
+ 150,
+ 17,
+ 2048,
+ 1024,
+ 1024));
+
+
+ /* tests for ops */
+
+ /* op of size 1 */
+ g_assert(do_test_accounting(true,
+ 1 * 512,
+ 150,
+ 0,
+ 2,
+ 1,
+ 1));
+
+ /* op of size 2 */
+ g_assert(do_test_accounting(true,
+ 2 * 512,
+ 150,
+ 0,
+ 2,
+ 1,
+ 1));
+
+ /* jumbo op accounting fragmentation : size 64 with op size of 13 units */
+ g_assert(do_test_accounting(true,
+ 64 * 512,
+ 150,
+ 13 * 512,
+ (64.0 * 2) / 13,
+ (64.0 / 13),
+ (64.0 / 13)));
+
+ /* same with orthogonal parameters changes */
+ g_assert(do_test_accounting(true,
+ 64 * 512,
+ 300,
+ 13 * 512,
+ (64.0 * 2) / 13,
+ (64.0 / 13),
+ (64.0 / 13)));
+}
+
+int main(int argc, char **argv)
+{
+ init_clocks();
+ do {} while (g_main_context_iteration(NULL, false));
+
+ /* tests in the same order as the header function declarations */
+ g_test_init(&argc, &argv, NULL);
+ g_test_add_func("/throttle/leak_bucket", test_leak_bucket);
+ g_test_add_func("/throttle/compute_wait", test_compute_wait);
+ g_test_add_func("/throttle/init", test_init);
+ g_test_add_func("/throttle/destroy", test_destroy);
+ g_test_add_func("/throttle/have_timer", test_have_timer);
+ g_test_add_func("/throttle/config/enabled", test_enabled);
+ g_test_add_func("/throttle/config/conflicting", test_conflicting_config);
+ g_test_add_func("/throttle/config/is_valid", test_is_valid);
+ g_test_add_func("/throttle/config_functions", test_config_functions);
+ g_test_add_func("/throttle/accounting", test_accounting);
+ return g_test_run();
+}
+
--
1.8.3.1
^ permalink raw reply related [flat|nested] 56+ messages in thread
* [Qemu-devel] [PULL 03/42] block: Enable the new throttling code in the block layer.
2013-09-06 15:38 [Qemu-devel] [PULL 00/42] Block patches Stefan Hajnoczi
2013-09-06 15:38 ` [Qemu-devel] [PULL 01/42] throttle: Add a new throttling API implementing continuous leaky bucket Stefan Hajnoczi
2013-09-06 15:38 ` [Qemu-devel] [PULL 02/42] throttle: Add units tests Stefan Hajnoczi
@ 2013-09-06 15:38 ` Stefan Hajnoczi
2013-09-06 15:38 ` [Qemu-devel] [PULL 04/42] block: Add support for throttling burst max in QMP and the command line Stefan Hajnoczi
` (38 subsequent siblings)
41 siblings, 0 replies; 56+ messages in thread
From: Stefan Hajnoczi @ 2013-09-06 15:38 UTC (permalink / raw)
To: qemu-devel; +Cc: Stefan Hajnoczi, Benoît Canet, Anthony Liguori
From: Benoît Canet <benoit@irqsave.net>
Signed-off-by: Benoit Canet <benoit@irqsave.net>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
block.c | 338 +++++++++++++---------------------------------
block/qapi.c | 21 ++-
blockdev.c | 102 +++++++-------
include/block/block.h | 1 -
include/block/block_int.h | 32 +----
5 files changed, 165 insertions(+), 329 deletions(-)
diff --git a/block.c b/block.c
index 26639e8..0292d1d 100644
--- a/block.c
+++ b/block.c
@@ -86,13 +86,6 @@ static void coroutine_fn bdrv_co_do_rw(void *opaque);
static int coroutine_fn bdrv_co_do_write_zeroes(BlockDriverState *bs,
int64_t sector_num, int nb_sectors);
-static bool bdrv_exceed_bps_limits(BlockDriverState *bs, int nb_sectors,
- bool is_write, double elapsed_time, uint64_t *wait);
-static bool bdrv_exceed_iops_limits(BlockDriverState *bs, bool is_write,
- double elapsed_time, uint64_t *wait);
-static bool bdrv_exceed_io_limits(BlockDriverState *bs, int nb_sectors,
- bool is_write, int64_t *wait);
-
static QTAILQ_HEAD(, BlockDriverState) bdrv_states =
QTAILQ_HEAD_INITIALIZER(bdrv_states);
@@ -123,69 +116,101 @@ int is_windows_drive(const char *filename)
#endif
/* throttling disk I/O limits */
-void bdrv_io_limits_disable(BlockDriverState *bs)
+void bdrv_set_io_limits(BlockDriverState *bs,
+ ThrottleConfig *cfg)
{
- bs->io_limits_enabled = false;
+ int i;
- do {} while (qemu_co_enter_next(&bs->throttled_reqs));
+ throttle_config(&bs->throttle_state, cfg);
- if (bs->block_timer) {
- timer_del(bs->block_timer);
- timer_free(bs->block_timer);
- bs->block_timer = NULL;
+ for (i = 0; i < 2; i++) {
+ qemu_co_enter_next(&bs->throttled_reqs[i]);
}
+}
+
+/* this function drain all the throttled IOs */
+static bool bdrv_start_throttled_reqs(BlockDriverState *bs)
+{
+ bool drained = false;
+ bool enabled = bs->io_limits_enabled;
+ int i;
+
+ bs->io_limits_enabled = false;
+
+ for (i = 0; i < 2; i++) {
+ while (qemu_co_enter_next(&bs->throttled_reqs[i])) {
+ drained = true;
+ }
+ }
+
+ bs->io_limits_enabled = enabled;
- bs->slice_start = 0;
- bs->slice_end = 0;
+ return drained;
}
-static void bdrv_block_timer(void *opaque)
+void bdrv_io_limits_disable(BlockDriverState *bs)
{
- BlockDriverState *bs = opaque;
+ bs->io_limits_enabled = false;
- qemu_co_enter_next(&bs->throttled_reqs);
+ bdrv_start_throttled_reqs(bs);
+
+ throttle_destroy(&bs->throttle_state);
}
-void bdrv_io_limits_enable(BlockDriverState *bs)
+static void bdrv_throttle_read_timer_cb(void *opaque)
{
- bs->block_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, bdrv_block_timer, bs);
- bs->io_limits_enabled = true;
+ BlockDriverState *bs = opaque;
+ qemu_co_enter_next(&bs->throttled_reqs[0]);
}
-bool bdrv_io_limits_enabled(BlockDriverState *bs)
+static void bdrv_throttle_write_timer_cb(void *opaque)
{
- BlockIOLimit *io_limits = &bs->io_limits;
- return io_limits->bps[BLOCK_IO_LIMIT_READ]
- || io_limits->bps[BLOCK_IO_LIMIT_WRITE]
- || io_limits->bps[BLOCK_IO_LIMIT_TOTAL]
- || io_limits->iops[BLOCK_IO_LIMIT_READ]
- || io_limits->iops[BLOCK_IO_LIMIT_WRITE]
- || io_limits->iops[BLOCK_IO_LIMIT_TOTAL];
+ BlockDriverState *bs = opaque;
+ qemu_co_enter_next(&bs->throttled_reqs[1]);
}
+/* should be called before bdrv_set_io_limits if a limit is set */
+void bdrv_io_limits_enable(BlockDriverState *bs)
+{
+ assert(!bs->io_limits_enabled);
+ throttle_init(&bs->throttle_state,
+ QEMU_CLOCK_VIRTUAL,
+ bdrv_throttle_read_timer_cb,
+ bdrv_throttle_write_timer_cb,
+ bs);
+ bs->io_limits_enabled = true;
+}
+
+/* This function makes an IO wait if needed
+ *
+ * @nb_sectors: the number of sectors of the IO
+ * @is_write: is the IO a write
+ */
static void bdrv_io_limits_intercept(BlockDriverState *bs,
- bool is_write, int nb_sectors)
+ int nb_sectors,
+ bool is_write)
{
- int64_t wait_time = -1;
+ /* does this io must wait */
+ bool must_wait = throttle_schedule_timer(&bs->throttle_state, is_write);
- if (!qemu_co_queue_empty(&bs->throttled_reqs)) {
- qemu_co_queue_wait(&bs->throttled_reqs);
+ /* if must wait or any request of this type throttled queue the IO */
+ if (must_wait ||
+ !qemu_co_queue_empty(&bs->throttled_reqs[is_write])) {
+ qemu_co_queue_wait(&bs->throttled_reqs[is_write]);
}
- /* In fact, we hope to keep each request's timing, in FIFO mode. The next
- * throttled requests will not be dequeued until the current request is
- * allowed to be serviced. So if the current request still exceeds the
- * limits, it will be inserted to the head. All requests followed it will
- * be still in throttled_reqs queue.
- */
+ /* the IO will be executed, do the accounting */
+ throttle_account(&bs->throttle_state,
+ is_write,
+ nb_sectors * BDRV_SECTOR_SIZE);
- while (bdrv_exceed_io_limits(bs, nb_sectors, is_write, &wait_time)) {
- timer_mod(bs->block_timer,
- wait_time + qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL));
- qemu_co_queue_wait_insert_head(&bs->throttled_reqs);
+ /* if the next request must wait -> do nothing */
+ if (throttle_schedule_timer(&bs->throttle_state, is_write)) {
+ return;
}
- qemu_co_queue_next(&bs->throttled_reqs);
+ /* else queue next request for execution */
+ qemu_co_queue_next(&bs->throttled_reqs[is_write]);
}
/* check if the path starts with "<protocol>:" */
@@ -305,7 +330,8 @@ BlockDriverState *bdrv_new(const char *device_name)
bdrv_iostatus_disable(bs);
notifier_list_init(&bs->close_notifiers);
notifier_with_return_list_init(&bs->before_write_notifiers);
- qemu_co_queue_init(&bs->throttled_reqs);
+ qemu_co_queue_init(&bs->throttled_reqs[0]);
+ qemu_co_queue_init(&bs->throttled_reqs[1]);
return bs;
}
@@ -1112,11 +1138,6 @@ int bdrv_open(BlockDriverState *bs, const char *filename, QDict *options,
bdrv_dev_change_media_cb(bs, true);
}
- /* throttling disk I/O limits */
- if (bs->io_limits_enabled) {
- bdrv_io_limits_enable(bs);
- }
-
return 0;
unlink_and_fail:
@@ -1435,7 +1456,10 @@ static bool bdrv_requests_pending(BlockDriverState *bs)
if (!QLIST_EMPTY(&bs->tracked_requests)) {
return true;
}
- if (!qemu_co_queue_empty(&bs->throttled_reqs)) {
+ if (!qemu_co_queue_empty(&bs->throttled_reqs[0])) {
+ return true;
+ }
+ if (!qemu_co_queue_empty(&bs->throttled_reqs[1])) {
return true;
}
if (bs->file && bdrv_requests_pending(bs->file)) {
@@ -1481,7 +1505,7 @@ void bdrv_drain_all(void)
* a busy wait.
*/
QTAILQ_FOREACH(bs, &bdrv_states, list) {
- while (qemu_co_enter_next(&bs->throttled_reqs)) {
+ if (bdrv_start_throttled_reqs(bs)) {
busy = true;
}
}
@@ -1523,13 +1547,12 @@ static void bdrv_move_feature_fields(BlockDriverState *bs_dest,
bs_dest->enable_write_cache = bs_src->enable_write_cache;
- /* i/o timing parameters */
- bs_dest->slice_start = bs_src->slice_start;
- bs_dest->slice_end = bs_src->slice_end;
- bs_dest->slice_submitted = bs_src->slice_submitted;
- bs_dest->io_limits = bs_src->io_limits;
- bs_dest->throttled_reqs = bs_src->throttled_reqs;
- bs_dest->block_timer = bs_src->block_timer;
+ /* i/o throttled req */
+ memcpy(&bs_dest->throttle_state,
+ &bs_src->throttle_state,
+ sizeof(ThrottleState));
+ bs_dest->throttled_reqs[0] = bs_src->throttled_reqs[0];
+ bs_dest->throttled_reqs[1] = bs_src->throttled_reqs[1];
bs_dest->io_limits_enabled = bs_src->io_limits_enabled;
/* r/w error */
@@ -1576,7 +1599,7 @@ void bdrv_swap(BlockDriverState *bs_new, BlockDriverState *bs_old)
assert(bs_new->dev == NULL);
assert(bs_new->in_use == 0);
assert(bs_new->io_limits_enabled == false);
- assert(bs_new->block_timer == NULL);
+ assert(!throttle_have_timer(&bs_new->throttle_state));
tmp = *bs_new;
*bs_new = *bs_old;
@@ -1595,7 +1618,7 @@ void bdrv_swap(BlockDriverState *bs_new, BlockDriverState *bs_old)
assert(bs_new->job == NULL);
assert(bs_new->in_use == 0);
assert(bs_new->io_limits_enabled == false);
- assert(bs_new->block_timer == NULL);
+ assert(!throttle_have_timer(&bs_new->throttle_state));
bdrv_rebind(bs_new);
bdrv_rebind(bs_old);
@@ -2538,11 +2561,6 @@ static int coroutine_fn bdrv_co_do_readv(BlockDriverState *bs,
return -EIO;
}
- /* throttling disk read I/O */
- if (bs->io_limits_enabled) {
- bdrv_io_limits_intercept(bs, false, nb_sectors);
- }
-
if (bs->copy_on_read) {
flags |= BDRV_REQ_COPY_ON_READ;
}
@@ -2554,6 +2572,11 @@ static int coroutine_fn bdrv_co_do_readv(BlockDriverState *bs,
wait_for_overlapping_requests(bs, sector_num, nb_sectors);
}
+ /* throttling disk I/O */
+ if (bs->io_limits_enabled) {
+ bdrv_io_limits_intercept(bs, nb_sectors, false);
+ }
+
tracked_request_begin(&req, bs, sector_num, nb_sectors, false);
if (flags & BDRV_REQ_COPY_ON_READ) {
@@ -2679,15 +2702,15 @@ static int coroutine_fn bdrv_co_do_writev(BlockDriverState *bs,
return -EIO;
}
- /* throttling disk write I/O */
- if (bs->io_limits_enabled) {
- bdrv_io_limits_intercept(bs, true, nb_sectors);
- }
-
if (bs->copy_on_read_in_flight) {
wait_for_overlapping_requests(bs, sector_num, nb_sectors);
}
+ /* throttling disk I/O */
+ if (bs->io_limits_enabled) {
+ bdrv_io_limits_intercept(bs, nb_sectors, true);
+ }
+
tracked_request_begin(&req, bs, sector_num, nb_sectors, true);
ret = notifier_with_return_list_notify(&bs->before_write_notifiers, &req);
@@ -2805,14 +2828,6 @@ void bdrv_get_geometry(BlockDriverState *bs, uint64_t *nb_sectors_ptr)
*nb_sectors_ptr = length;
}
-/* throttling disk io limits */
-void bdrv_set_io_limits(BlockDriverState *bs,
- BlockIOLimit *io_limits)
-{
- bs->io_limits = *io_limits;
- bs->io_limits_enabled = bdrv_io_limits_enabled(bs);
-}
-
void bdrv_set_on_error(BlockDriverState *bs, BlockdevOnError on_read_error,
BlockdevOnError on_write_error)
{
@@ -3622,169 +3637,6 @@ void bdrv_aio_cancel(BlockDriverAIOCB *acb)
acb->aiocb_info->cancel(acb);
}
-/* block I/O throttling */
-static bool bdrv_exceed_bps_limits(BlockDriverState *bs, int nb_sectors,
- bool is_write, double elapsed_time, uint64_t *wait)
-{
- uint64_t bps_limit = 0;
- uint64_t extension;
- double bytes_limit, bytes_base, bytes_res;
- double slice_time, wait_time;
-
- if (bs->io_limits.bps[BLOCK_IO_LIMIT_TOTAL]) {
- bps_limit = bs->io_limits.bps[BLOCK_IO_LIMIT_TOTAL];
- } else if (bs->io_limits.bps[is_write]) {
- bps_limit = bs->io_limits.bps[is_write];
- } else {
- if (wait) {
- *wait = 0;
- }
-
- return false;
- }
-
- slice_time = bs->slice_end - bs->slice_start;
- slice_time /= (NANOSECONDS_PER_SECOND);
- bytes_limit = bps_limit * slice_time;
- bytes_base = bs->slice_submitted.bytes[is_write];
- if (bs->io_limits.bps[BLOCK_IO_LIMIT_TOTAL]) {
- bytes_base += bs->slice_submitted.bytes[!is_write];
- }
-
- /* bytes_base: the bytes of data which have been read/written; and
- * it is obtained from the history statistic info.
- * bytes_res: the remaining bytes of data which need to be read/written.
- * (bytes_base + bytes_res) / bps_limit: used to calcuate
- * the total time for completing reading/writting all data.
- */
- bytes_res = (unsigned) nb_sectors * BDRV_SECTOR_SIZE;
-
- if (bytes_base + bytes_res <= bytes_limit) {
- if (wait) {
- *wait = 0;
- }
-
- return false;
- }
-
- /* Calc approx time to dispatch */
- wait_time = (bytes_base + bytes_res) / bps_limit - elapsed_time;
-
- /* When the I/O rate at runtime exceeds the limits,
- * bs->slice_end need to be extended in order that the current statistic
- * info can be kept until the timer fire, so it is increased and tuned
- * based on the result of experiment.
- */
- extension = wait_time * NANOSECONDS_PER_SECOND;
- extension = DIV_ROUND_UP(extension, BLOCK_IO_SLICE_TIME) *
- BLOCK_IO_SLICE_TIME;
- bs->slice_end += extension;
- if (wait) {
- *wait = wait_time * NANOSECONDS_PER_SECOND;
- }
-
- return true;
-}
-
-static bool bdrv_exceed_iops_limits(BlockDriverState *bs, bool is_write,
- double elapsed_time, uint64_t *wait)
-{
- uint64_t iops_limit = 0;
- double ios_limit, ios_base;
- double slice_time, wait_time;
-
- if (bs->io_limits.iops[BLOCK_IO_LIMIT_TOTAL]) {
- iops_limit = bs->io_limits.iops[BLOCK_IO_LIMIT_TOTAL];
- } else if (bs->io_limits.iops[is_write]) {
- iops_limit = bs->io_limits.iops[is_write];
- } else {
- if (wait) {
- *wait = 0;
- }
-
- return false;
- }
-
- slice_time = bs->slice_end - bs->slice_start;
- slice_time /= (NANOSECONDS_PER_SECOND);
- ios_limit = iops_limit * slice_time;
- ios_base = bs->slice_submitted.ios[is_write];
- if (bs->io_limits.iops[BLOCK_IO_LIMIT_TOTAL]) {
- ios_base += bs->slice_submitted.ios[!is_write];
- }
-
- if (ios_base + 1 <= ios_limit) {
- if (wait) {
- *wait = 0;
- }
-
- return false;
- }
-
- /* Calc approx time to dispatch, in seconds */
- wait_time = (ios_base + 1) / iops_limit;
- if (wait_time > elapsed_time) {
- wait_time = wait_time - elapsed_time;
- } else {
- wait_time = 0;
- }
-
- /* Exceeded current slice, extend it by another slice time */
- bs->slice_end += BLOCK_IO_SLICE_TIME;
- if (wait) {
- *wait = wait_time * NANOSECONDS_PER_SECOND;
- }
-
- return true;
-}
-
-static bool bdrv_exceed_io_limits(BlockDriverState *bs, int nb_sectors,
- bool is_write, int64_t *wait)
-{
- int64_t now, max_wait;
- uint64_t bps_wait = 0, iops_wait = 0;
- double elapsed_time;
- int bps_ret, iops_ret;
-
- now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
- if (now > bs->slice_end) {
- bs->slice_start = now;
- bs->slice_end = now + BLOCK_IO_SLICE_TIME;
- memset(&bs->slice_submitted, 0, sizeof(bs->slice_submitted));
- }
-
- elapsed_time = now - bs->slice_start;
- elapsed_time /= (NANOSECONDS_PER_SECOND);
-
- bps_ret = bdrv_exceed_bps_limits(bs, nb_sectors,
- is_write, elapsed_time, &bps_wait);
- iops_ret = bdrv_exceed_iops_limits(bs, is_write,
- elapsed_time, &iops_wait);
- if (bps_ret || iops_ret) {
- max_wait = bps_wait > iops_wait ? bps_wait : iops_wait;
- if (wait) {
- *wait = max_wait;
- }
-
- now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
- if (bs->slice_end < now + max_wait) {
- bs->slice_end = now + max_wait;
- }
-
- return true;
- }
-
- if (wait) {
- *wait = 0;
- }
-
- bs->slice_submitted.bytes[is_write] += (int64_t)nb_sectors *
- BDRV_SECTOR_SIZE;
- bs->slice_submitted.ios[is_write]++;
-
- return false;
-}
-
/**************************************************************/
/* async block device emulation */
diff --git a/block/qapi.c b/block/qapi.c
index a4bc411..cac3919 100644
--- a/block/qapi.c
+++ b/block/qapi.c
@@ -223,18 +223,15 @@ void bdrv_query_info(BlockDriverState *bs,
info->inserted->backing_file_depth = bdrv_get_backing_file_depth(bs);
if (bs->io_limits_enabled) {
- info->inserted->bps =
- bs->io_limits.bps[BLOCK_IO_LIMIT_TOTAL];
- info->inserted->bps_rd =
- bs->io_limits.bps[BLOCK_IO_LIMIT_READ];
- info->inserted->bps_wr =
- bs->io_limits.bps[BLOCK_IO_LIMIT_WRITE];
- info->inserted->iops =
- bs->io_limits.iops[BLOCK_IO_LIMIT_TOTAL];
- info->inserted->iops_rd =
- bs->io_limits.iops[BLOCK_IO_LIMIT_READ];
- info->inserted->iops_wr =
- bs->io_limits.iops[BLOCK_IO_LIMIT_WRITE];
+ ThrottleConfig cfg;
+ throttle_get_config(&bs->throttle_state, &cfg);
+ info->inserted->bps = cfg.buckets[THROTTLE_BPS_TOTAL].avg;
+ info->inserted->bps_rd = cfg.buckets[THROTTLE_BPS_READ].avg;
+ info->inserted->bps_wr = cfg.buckets[THROTTLE_BPS_WRITE].avg;
+
+ info->inserted->iops = cfg.buckets[THROTTLE_OPS_TOTAL].avg;
+ info->inserted->iops_rd = cfg.buckets[THROTTLE_OPS_READ].avg;
+ info->inserted->iops_wr = cfg.buckets[THROTTLE_OPS_WRITE].avg;
}
bs0 = bs;
diff --git a/blockdev.c b/blockdev.c
index e70e16e..5f5ba96 100644
--- a/blockdev.c
+++ b/blockdev.c
@@ -280,32 +280,16 @@ static int parse_block_error_action(const char *buf, bool is_read)
}
}
-static bool do_check_io_limits(BlockIOLimit *io_limits, Error **errp)
+static bool check_throttle_config(ThrottleConfig *cfg, Error **errp)
{
- bool bps_flag;
- bool iops_flag;
-
- assert(io_limits);
-
- bps_flag = (io_limits->bps[BLOCK_IO_LIMIT_TOTAL] != 0)
- && ((io_limits->bps[BLOCK_IO_LIMIT_READ] != 0)
- || (io_limits->bps[BLOCK_IO_LIMIT_WRITE] != 0));
- iops_flag = (io_limits->iops[BLOCK_IO_LIMIT_TOTAL] != 0)
- && ((io_limits->iops[BLOCK_IO_LIMIT_READ] != 0)
- || (io_limits->iops[BLOCK_IO_LIMIT_WRITE] != 0));
- if (bps_flag || iops_flag) {
- error_setg(errp, "bps(iops) and bps_rd/bps_wr(iops_rd/iops_wr) "
- "cannot be used at the same time");
+ if (throttle_conflicting(cfg)) {
+ error_setg(errp, "bps/iops/max total values and read/write values"
+ " cannot be used at the same time");
return false;
}
- if (io_limits->bps[BLOCK_IO_LIMIT_TOTAL] < 0 ||
- io_limits->bps[BLOCK_IO_LIMIT_WRITE] < 0 ||
- io_limits->bps[BLOCK_IO_LIMIT_READ] < 0 ||
- io_limits->iops[BLOCK_IO_LIMIT_TOTAL] < 0 ||
- io_limits->iops[BLOCK_IO_LIMIT_WRITE] < 0 ||
- io_limits->iops[BLOCK_IO_LIMIT_READ] < 0) {
- error_setg(errp, "bps and iops values must be 0 or greater");
+ if (!throttle_is_valid(cfg)) {
+ error_setg(errp, "bps/iops/maxs values must be 0 or greater");
return false;
}
@@ -330,7 +314,7 @@ static DriveInfo *blockdev_init(QemuOpts *all_opts,
int on_read_error, on_write_error;
const char *devaddr;
DriveInfo *dinfo;
- BlockIOLimit io_limits;
+ ThrottleConfig cfg;
int snapshot = 0;
bool copy_on_read;
int ret;
@@ -496,20 +480,31 @@ static DriveInfo *blockdev_init(QemuOpts *all_opts,
}
/* disk I/O throttling */
- io_limits.bps[BLOCK_IO_LIMIT_TOTAL] =
+ memset(&cfg, 0, sizeof(cfg));
+ cfg.buckets[THROTTLE_BPS_TOTAL].avg =
qemu_opt_get_number(opts, "throttling.bps-total", 0);
- io_limits.bps[BLOCK_IO_LIMIT_READ] =
+ cfg.buckets[THROTTLE_BPS_READ].avg =
qemu_opt_get_number(opts, "throttling.bps-read", 0);
- io_limits.bps[BLOCK_IO_LIMIT_WRITE] =
+ cfg.buckets[THROTTLE_BPS_WRITE].avg =
qemu_opt_get_number(opts, "throttling.bps-write", 0);
- io_limits.iops[BLOCK_IO_LIMIT_TOTAL] =
+ cfg.buckets[THROTTLE_OPS_TOTAL].avg =
qemu_opt_get_number(opts, "throttling.iops-total", 0);
- io_limits.iops[BLOCK_IO_LIMIT_READ] =
+ cfg.buckets[THROTTLE_OPS_READ].avg =
qemu_opt_get_number(opts, "throttling.iops-read", 0);
- io_limits.iops[BLOCK_IO_LIMIT_WRITE] =
+ cfg.buckets[THROTTLE_OPS_WRITE].avg =
qemu_opt_get_number(opts, "throttling.iops-write", 0);
- if (!do_check_io_limits(&io_limits, &error)) {
+ cfg.buckets[THROTTLE_BPS_TOTAL].max = 0;
+ cfg.buckets[THROTTLE_BPS_READ].max = 0;
+ cfg.buckets[THROTTLE_BPS_WRITE].max = 0;
+
+ cfg.buckets[THROTTLE_OPS_TOTAL].max = 0;
+ cfg.buckets[THROTTLE_OPS_READ].max = 0;
+ cfg.buckets[THROTTLE_OPS_WRITE].max = 0;
+
+ cfg.op_size = 0;
+
+ if (!check_throttle_config(&cfg, &error)) {
error_report("%s", error_get_pretty(error));
error_free(error);
return NULL;
@@ -636,7 +631,10 @@ static DriveInfo *blockdev_init(QemuOpts *all_opts,
bdrv_set_on_error(dinfo->bdrv, on_read_error, on_write_error);
/* disk I/O throttling */
- bdrv_set_io_limits(dinfo->bdrv, &io_limits);
+ if (throttle_enabled(&cfg)) {
+ bdrv_io_limits_enable(dinfo->bdrv);
+ bdrv_set_io_limits(dinfo->bdrv, &cfg);
+ }
switch(type) {
case IF_IDE:
@@ -1250,7 +1248,7 @@ void qmp_block_set_io_throttle(const char *device, int64_t bps, int64_t bps_rd,
int64_t bps_wr, int64_t iops, int64_t iops_rd,
int64_t iops_wr, Error **errp)
{
- BlockIOLimit io_limits;
+ ThrottleConfig cfg;
BlockDriverState *bs;
bs = bdrv_find(device);
@@ -1259,27 +1257,37 @@ void qmp_block_set_io_throttle(const char *device, int64_t bps, int64_t bps_rd,
return;
}
- io_limits.bps[BLOCK_IO_LIMIT_TOTAL] = bps;
- io_limits.bps[BLOCK_IO_LIMIT_READ] = bps_rd;
- io_limits.bps[BLOCK_IO_LIMIT_WRITE] = bps_wr;
- io_limits.iops[BLOCK_IO_LIMIT_TOTAL]= iops;
- io_limits.iops[BLOCK_IO_LIMIT_READ] = iops_rd;
- io_limits.iops[BLOCK_IO_LIMIT_WRITE]= iops_wr;
+ memset(&cfg, 0, sizeof(cfg));
+ cfg.buckets[THROTTLE_BPS_TOTAL].avg = bps;
+ cfg.buckets[THROTTLE_BPS_READ].avg = bps_rd;
+ cfg.buckets[THROTTLE_BPS_WRITE].avg = bps_wr;
+
+ cfg.buckets[THROTTLE_OPS_TOTAL].avg = iops;
+ cfg.buckets[THROTTLE_OPS_READ].avg = iops_rd;
+ cfg.buckets[THROTTLE_OPS_WRITE].avg = iops_wr;
+
+ cfg.buckets[THROTTLE_BPS_TOTAL].max = 0;
+ cfg.buckets[THROTTLE_BPS_READ].max = 0;
+ cfg.buckets[THROTTLE_BPS_WRITE].max = 0;
+
+ cfg.buckets[THROTTLE_OPS_TOTAL].max = 0;
+ cfg.buckets[THROTTLE_OPS_READ].max = 0;
+ cfg.buckets[THROTTLE_OPS_WRITE].max = 0;
- if (!do_check_io_limits(&io_limits, errp)) {
+ cfg.op_size = 0;
+
+ if (!check_throttle_config(&cfg, errp)) {
return;
}
- bs->io_limits = io_limits;
-
- if (!bs->io_limits_enabled && bdrv_io_limits_enabled(bs)) {
+ if (!bs->io_limits_enabled && throttle_enabled(&cfg)) {
bdrv_io_limits_enable(bs);
- } else if (bs->io_limits_enabled && !bdrv_io_limits_enabled(bs)) {
+ } else if (bs->io_limits_enabled && !throttle_enabled(&cfg)) {
bdrv_io_limits_disable(bs);
- } else {
- if (bs->block_timer) {
- timer_mod(bs->block_timer, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL));
- }
+ }
+
+ if (bs->io_limits_enabled) {
+ bdrv_set_io_limits(bs, &cfg);
}
}
diff --git a/include/block/block.h b/include/block/block.h
index e6b391c..6207ff2 100644
--- a/include/block/block.h
+++ b/include/block/block.h
@@ -107,7 +107,6 @@ void bdrv_info_stats(Monitor *mon, QObject **ret_data);
/* disk I/O throttling */
void bdrv_io_limits_enable(BlockDriverState *bs);
void bdrv_io_limits_disable(BlockDriverState *bs);
-bool bdrv_io_limits_enabled(BlockDriverState *bs);
void bdrv_init(void);
void bdrv_init_with_whitelist(void);
diff --git a/include/block/block_int.h b/include/block/block_int.h
index 8012e25..c3c9c61 100644
--- a/include/block/block_int.h
+++ b/include/block/block_int.h
@@ -35,18 +35,12 @@
#include "qemu/hbitmap.h"
#include "block/snapshot.h"
#include "qemu/main-loop.h"
+#include "qemu/throttle.h"
#define BLOCK_FLAG_ENCRYPT 1
#define BLOCK_FLAG_COMPAT6 4
#define BLOCK_FLAG_LAZY_REFCOUNTS 8
-#define BLOCK_IO_LIMIT_READ 0
-#define BLOCK_IO_LIMIT_WRITE 1
-#define BLOCK_IO_LIMIT_TOTAL 2
-
-#define BLOCK_IO_SLICE_TIME 100000000
-#define NANOSECONDS_PER_SECOND 1000000000.0
-
#define BLOCK_OPT_SIZE "size"
#define BLOCK_OPT_ENCRYPT "encryption"
#define BLOCK_OPT_COMPAT6 "compat6"
@@ -70,17 +64,6 @@ typedef struct BdrvTrackedRequest {
CoQueue wait_queue; /* coroutines blocked on this request */
} BdrvTrackedRequest;
-
-typedef struct BlockIOLimit {
- int64_t bps[3];
- int64_t iops[3];
-} BlockIOLimit;
-
-typedef struct BlockIOBaseValue {
- uint64_t bytes[2];
- uint64_t ios[2];
-} BlockIOBaseValue;
-
struct BlockDriver {
const char *format_name;
int instance_size;
@@ -264,13 +247,9 @@ struct BlockDriverState {
/* number of in-flight copy-on-read requests */
unsigned int copy_on_read_in_flight;
- /* the time for latest disk I/O */
- int64_t slice_start;
- int64_t slice_end;
- BlockIOLimit io_limits;
- BlockIOBaseValue slice_submitted;
- CoQueue throttled_reqs;
- QEMUTimer *block_timer;
+ /* I/O throttling */
+ ThrottleState throttle_state;
+ CoQueue throttled_reqs[2];
bool io_limits_enabled;
/* I/O stats (display with "info blockstats"). */
@@ -312,7 +291,8 @@ struct BlockDriverState {
int get_tmp_filename(char *filename, int size);
void bdrv_set_io_limits(BlockDriverState *bs,
- BlockIOLimit *io_limits);
+ ThrottleConfig *cfg);
+
/**
* bdrv_add_before_write_notifier:
--
1.8.3.1
^ permalink raw reply related [flat|nested] 56+ messages in thread
* [Qemu-devel] [PULL 04/42] block: Add support for throttling burst max in QMP and the command line.
2013-09-06 15:38 [Qemu-devel] [PULL 00/42] Block patches Stefan Hajnoczi
` (2 preceding siblings ...)
2013-09-06 15:38 ` [Qemu-devel] [PULL 03/42] block: Enable the new throttling code in the block layer Stefan Hajnoczi
@ 2013-09-06 15:38 ` Stefan Hajnoczi
2013-09-06 15:38 ` [Qemu-devel] [PULL 05/42] block: Add iops_size to do the iops accounting for a given io size Stefan Hajnoczi
` (37 subsequent siblings)
41 siblings, 0 replies; 56+ messages in thread
From: Stefan Hajnoczi @ 2013-09-06 15:38 UTC (permalink / raw)
To: qemu-devel; +Cc: Stefan Hajnoczi, Benoît Canet, Anthony Liguori
From: Benoît Canet <benoit@irqsave.net>
The max parameter of the leaky bucket throttling algorithm can be used to
allow the guest to do bursts.
The max value is a pool of I/O that the guest can use without being throttled
at all. Throttling is triggered once this pool is empty.
Signed-off-by: Benoit Canet <benoit@irqsave.net>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
block/qapi.c | 26 ++++++++++++++++
blockdev.c | 94 ++++++++++++++++++++++++++++++++++++++++++++++----------
hmp.c | 32 +++++++++++++++++--
qapi-schema.json | 34 ++++++++++++++++++--
qemu-options.hx | 5 ++-
qmp-commands.hx | 28 +++++++++++++++--
6 files changed, 195 insertions(+), 24 deletions(-)
diff --git a/block/qapi.c b/block/qapi.c
index cac3919..b1edc66 100644
--- a/block/qapi.c
+++ b/block/qapi.c
@@ -232,6 +232,32 @@ void bdrv_query_info(BlockDriverState *bs,
info->inserted->iops = cfg.buckets[THROTTLE_OPS_TOTAL].avg;
info->inserted->iops_rd = cfg.buckets[THROTTLE_OPS_READ].avg;
info->inserted->iops_wr = cfg.buckets[THROTTLE_OPS_WRITE].avg;
+
+ info->inserted->has_bps_max =
+ cfg.buckets[THROTTLE_BPS_TOTAL].max;
+ info->inserted->bps_max =
+ cfg.buckets[THROTTLE_BPS_TOTAL].max;
+ info->inserted->has_bps_rd_max =
+ cfg.buckets[THROTTLE_BPS_READ].max;
+ info->inserted->bps_rd_max =
+ cfg.buckets[THROTTLE_BPS_READ].max;
+ info->inserted->has_bps_wr_max =
+ cfg.buckets[THROTTLE_BPS_WRITE].max;
+ info->inserted->bps_wr_max =
+ cfg.buckets[THROTTLE_BPS_WRITE].max;
+
+ info->inserted->has_iops_max =
+ cfg.buckets[THROTTLE_OPS_TOTAL].max;
+ info->inserted->iops_max =
+ cfg.buckets[THROTTLE_OPS_TOTAL].max;
+ info->inserted->has_iops_rd_max =
+ cfg.buckets[THROTTLE_OPS_READ].max;
+ info->inserted->iops_rd_max =
+ cfg.buckets[THROTTLE_OPS_READ].max;
+ info->inserted->has_iops_wr_max =
+ cfg.buckets[THROTTLE_OPS_WRITE].max;
+ info->inserted->iops_wr_max =
+ cfg.buckets[THROTTLE_OPS_WRITE].max;
}
bs0 = bs;
diff --git a/blockdev.c b/blockdev.c
index 5f5ba96..76e9308 100644
--- a/blockdev.c
+++ b/blockdev.c
@@ -494,13 +494,18 @@ static DriveInfo *blockdev_init(QemuOpts *all_opts,
cfg.buckets[THROTTLE_OPS_WRITE].avg =
qemu_opt_get_number(opts, "throttling.iops-write", 0);
- cfg.buckets[THROTTLE_BPS_TOTAL].max = 0;
- cfg.buckets[THROTTLE_BPS_READ].max = 0;
- cfg.buckets[THROTTLE_BPS_WRITE].max = 0;
-
- cfg.buckets[THROTTLE_OPS_TOTAL].max = 0;
- cfg.buckets[THROTTLE_OPS_READ].max = 0;
- cfg.buckets[THROTTLE_OPS_WRITE].max = 0;
+ cfg.buckets[THROTTLE_BPS_TOTAL].max =
+ qemu_opt_get_number(opts, "throttling.bps-total-max", 0);
+ cfg.buckets[THROTTLE_BPS_READ].max =
+ qemu_opt_get_number(opts, "throttling.bps-read-max", 0);
+ cfg.buckets[THROTTLE_BPS_WRITE].max =
+ qemu_opt_get_number(opts, "throttling.bps-write-max", 0);
+ cfg.buckets[THROTTLE_OPS_TOTAL].max =
+ qemu_opt_get_number(opts, "throttling.iops-total-max", 0);
+ cfg.buckets[THROTTLE_OPS_READ].max =
+ qemu_opt_get_number(opts, "throttling.iops-read-max", 0);
+ cfg.buckets[THROTTLE_OPS_WRITE].max =
+ qemu_opt_get_number(opts, "throttling.iops-write-max", 0);
cfg.op_size = 0;
@@ -761,6 +766,14 @@ DriveInfo *drive_init(QemuOpts *all_opts, BlockInterfaceType block_default_type)
qemu_opt_rename(all_opts, "bps_rd", "throttling.bps-read");
qemu_opt_rename(all_opts, "bps_wr", "throttling.bps-write");
+ qemu_opt_rename(all_opts, "iops_max", "throttling.iops-total-max");
+ qemu_opt_rename(all_opts, "iops_rd_max", "throttling.iops-read-max");
+ qemu_opt_rename(all_opts, "iops_wr_max", "throttling.iops-write-max");
+
+ qemu_opt_rename(all_opts, "bps_max", "throttling.bps-total-max");
+ qemu_opt_rename(all_opts, "bps_rd_max", "throttling.bps-read-max");
+ qemu_opt_rename(all_opts, "bps_wr_max", "throttling.bps-write-max");
+
qemu_opt_rename(all_opts, "readonly", "read-only");
value = qemu_opt_get(all_opts, "cache");
@@ -1245,8 +1258,22 @@ void qmp_change_blockdev(const char *device, const char *filename,
/* throttling disk I/O limits */
void qmp_block_set_io_throttle(const char *device, int64_t bps, int64_t bps_rd,
- int64_t bps_wr, int64_t iops, int64_t iops_rd,
- int64_t iops_wr, Error **errp)
+ int64_t bps_wr,
+ int64_t iops,
+ int64_t iops_rd,
+ int64_t iops_wr,
+ bool has_bps_max,
+ int64_t bps_max,
+ bool has_bps_rd_max,
+ int64_t bps_rd_max,
+ bool has_bps_wr_max,
+ int64_t bps_wr_max,
+ bool has_iops_max,
+ int64_t iops_max,
+ bool has_iops_rd_max,
+ int64_t iops_rd_max,
+ bool has_iops_wr_max,
+ int64_t iops_wr_max, Error **errp)
{
ThrottleConfig cfg;
BlockDriverState *bs;
@@ -1266,13 +1293,24 @@ void qmp_block_set_io_throttle(const char *device, int64_t bps, int64_t bps_rd,
cfg.buckets[THROTTLE_OPS_READ].avg = iops_rd;
cfg.buckets[THROTTLE_OPS_WRITE].avg = iops_wr;
- cfg.buckets[THROTTLE_BPS_TOTAL].max = 0;
- cfg.buckets[THROTTLE_BPS_READ].max = 0;
- cfg.buckets[THROTTLE_BPS_WRITE].max = 0;
-
- cfg.buckets[THROTTLE_OPS_TOTAL].max = 0;
- cfg.buckets[THROTTLE_OPS_READ].max = 0;
- cfg.buckets[THROTTLE_OPS_WRITE].max = 0;
+ if (has_bps_max) {
+ cfg.buckets[THROTTLE_BPS_TOTAL].max = bps_max;
+ }
+ if (has_bps_rd_max) {
+ cfg.buckets[THROTTLE_BPS_READ].max = bps_rd_max;
+ }
+ if (has_bps_wr_max) {
+ cfg.buckets[THROTTLE_BPS_WRITE].max = bps_wr_max;
+ }
+ if (has_iops_max) {
+ cfg.buckets[THROTTLE_OPS_TOTAL].max = iops_max;
+ }
+ if (has_iops_rd_max) {
+ cfg.buckets[THROTTLE_OPS_READ].max = iops_rd_max;
+ }
+ if (has_iops_wr_max) {
+ cfg.buckets[THROTTLE_OPS_WRITE].max = iops_wr_max;
+ }
cfg.op_size = 0;
@@ -1976,6 +2014,30 @@ QemuOptsList qemu_common_drive_opts = {
.type = QEMU_OPT_NUMBER,
.help = "limit write bytes per second",
},{
+ .name = "throttling.iops-total-max",
+ .type = QEMU_OPT_NUMBER,
+ .help = "I/O operations burst",
+ },{
+ .name = "throttling.iops-read-max",
+ .type = QEMU_OPT_NUMBER,
+ .help = "I/O operations read burst",
+ },{
+ .name = "throttling.iops-write-max",
+ .type = QEMU_OPT_NUMBER,
+ .help = "I/O operations write burst",
+ },{
+ .name = "throttling.bps-total-max",
+ .type = QEMU_OPT_NUMBER,
+ .help = "total bytes burst",
+ },{
+ .name = "throttling.bps-read-max",
+ .type = QEMU_OPT_NUMBER,
+ .help = "total bytes read burst",
+ },{
+ .name = "throttling.bps-write-max",
+ .type = QEMU_OPT_NUMBER,
+ .help = "total bytes write burst",
+ },{
.name = "copy-on-read",
.type = QEMU_OPT_BOOL,
.help = "copy read data from backing file into image file",
diff --git a/hmp.c b/hmp.c
index fcca6ae..85a6c16 100644
--- a/hmp.c
+++ b/hmp.c
@@ -344,14 +344,28 @@ void hmp_info_block(Monitor *mon, const QDict *qdict)
{
monitor_printf(mon, " I/O throttling: bps=%" PRId64
" bps_rd=%" PRId64 " bps_wr=%" PRId64
+ " bps_max=%" PRId64
+ " bps_rd_max=%" PRId64
+ " bps_wr_max=%" PRId64
" iops=%" PRId64 " iops_rd=%" PRId64
- " iops_wr=%" PRId64 "\n",
+ " iops_wr=%" PRId64
+ " iops_max=%" PRId64
+ " iops_rd_max=%" PRId64
+ " iops_wr_max=%" PRId64 "\n",
info->value->inserted->bps,
info->value->inserted->bps_rd,
info->value->inserted->bps_wr,
+ info->value->inserted->bps_max,
+ info->value->inserted->bps_rd_max,
+ info->value->inserted->bps_wr_max,
info->value->inserted->iops,
info->value->inserted->iops_rd,
- info->value->inserted->iops_wr);
+ info->value->inserted->iops_wr,
+ info->value->inserted->iops_max,
+ info->value->inserted->iops_rd_max,
+ info->value->inserted->iops_wr_max);
+ } else {
+ monitor_printf(mon, " [not inserted]");
}
if (verbose) {
@@ -1098,7 +1112,19 @@ void hmp_block_set_io_throttle(Monitor *mon, const QDict *qdict)
qdict_get_int(qdict, "bps_wr"),
qdict_get_int(qdict, "iops"),
qdict_get_int(qdict, "iops_rd"),
- qdict_get_int(qdict, "iops_wr"), &err);
+ qdict_get_int(qdict, "iops_wr"),
+ false, /* no burst max via HMP */
+ 0,
+ false,
+ 0,
+ false,
+ 0,
+ false,
+ 0,
+ false,
+ 0,
+ false,
+ 0, &err);
hmp_handle_error(mon, &err);
}
diff --git a/qapi-schema.json b/qapi-schema.json
index a51f7d2..6a9b8ca 100644
--- a/qapi-schema.json
+++ b/qapi-schema.json
@@ -785,6 +785,18 @@
#
# @image: the info of image used (since: 1.6)
#
+# @bps_max: #optional total max in bytes (Since 1.7)
+#
+# @bps_rd_max: #optional read max in bytes (Since 1.7)
+#
+# @bps_wr_max: #optional write max in bytes (Since 1.7)
+#
+# @iops_max: #optional total I/O operations max (Since 1.7)
+#
+# @iops_rd_max: #optional read I/O operations max (Since 1.7)
+#
+# @iops_wr_max: #optional write I/O operations max (Since 1.7)
+#
# Since: 0.14.0
#
# Notes: This interface is only found in @BlockInfo.
@@ -795,7 +807,10 @@
'encrypted': 'bool', 'encryption_key_missing': 'bool',
'bps': 'int', 'bps_rd': 'int', 'bps_wr': 'int',
'iops': 'int', 'iops_rd': 'int', 'iops_wr': 'int',
- 'image': 'ImageInfo' } }
+ 'image': 'ImageInfo',
+ '*bps_max': 'int', '*bps_rd_max': 'int',
+ '*bps_wr_max': 'int', '*iops_max': 'int',
+ '*iops_rd_max': 'int', '*iops_wr_max': 'int' } }
##
# @BlockDeviceIoStatus:
@@ -2174,6 +2189,18 @@
#
# @iops_wr: write I/O operations per second
#
+# @bps_max: #optional total max in bytes (Since 1.7)
+#
+# @bps_rd_max: #optional read max in bytes (Since 1.7)
+#
+# @bps_wr_max: #optional write max in bytes (Since 1.7)
+#
+# @iops_max: #optional total I/O operations max (Since 1.7)
+#
+# @iops_rd_max: #optional read I/O operations max (Since 1.7)
+#
+# @iops_wr_max: #optional write I/O operations max (Since 1.7)
+#
# Returns: Nothing on success
# If @device is not a valid block device, DeviceNotFound
#
@@ -2181,7 +2208,10 @@
##
{ 'command': 'block_set_io_throttle',
'data': { 'device': 'str', 'bps': 'int', 'bps_rd': 'int', 'bps_wr': 'int',
- 'iops': 'int', 'iops_rd': 'int', 'iops_wr': 'int' } }
+ 'iops': 'int', 'iops_rd': 'int', 'iops_wr': 'int',
+ '*bps_max': 'int', '*bps_rd_max': 'int',
+ '*bps_wr_max': 'int', '*iops_max': 'int',
+ '*iops_rd_max': 'int', '*iops_wr_max': 'int' } }
##
# @block-stream:
diff --git a/qemu-options.hx b/qemu-options.hx
index d15338e..d3760df 100644
--- a/qemu-options.hx
+++ b/qemu-options.hx
@@ -409,7 +409,10 @@ DEF("drive", HAS_ARG, QEMU_OPTION_drive,
" [,cache=writethrough|writeback|none|directsync|unsafe][,format=f]\n"
" [,serial=s][,addr=A][,id=name][,aio=threads|native]\n"
" [,readonly=on|off][,copy-on-read=on|off]\n"
- " [[,bps=b]|[[,bps_rd=r][,bps_wr=w]]][[,iops=i]|[[,iops_rd=r][,iops_wr=w]]\n"
+ " [[,bps=b]|[[,bps_rd=r][,bps_wr=w]]]\n"
+ " [[,iops=i]|[[,iops_rd=r][,iops_wr=w]]]\n"
+ " [[,bps_max=bm]|[[,bps_rd_max=rm][,bps_wr_max=wm]]]\n"
+ " [[,iops_max=im]|[[,iops_rd_max=irm][,iops_wr_max=iwm]]]\n"
" use 'file' as a drive image\n", QEMU_ARCH_ALL)
STEXI
@item -drive @var{option}[,@var{option}[,@var{option}[,...]]]
diff --git a/qmp-commands.hx b/qmp-commands.hx
index 8a8f342..7c9667b 100644
--- a/qmp-commands.hx
+++ b/qmp-commands.hx
@@ -1389,7 +1389,7 @@ EQMP
{
.name = "block_set_io_throttle",
- .args_type = "device:B,bps:l,bps_rd:l,bps_wr:l,iops:l,iops_rd:l,iops_wr:l",
+ .args_type = "device:B,bps:l,bps_rd:l,bps_wr:l,iops:l,iops_rd:l,iops_wr:l,bps_max:l?,bps_rd_max:l?,bps_wr_max:l?,iops_max:l?,iops_rd_max:l?,iops_wr_max:l?",
.mhandler.cmd_new = qmp_marshal_input_block_set_io_throttle,
},
@@ -1408,6 +1408,12 @@ Arguments:
- "iops": total I/O operations per second (json-int)
- "iops_rd": read I/O operations per second (json-int)
- "iops_wr": write I/O operations per second (json-int)
+- "bps_max": total max in bytes (json-int)
+- "bps_rd_max": read max in bytes (json-int)
+- "bps_wr_max": write max in bytes (json-int)
+- "iops_max": total I/O operations max (json-int)
+- "iops_rd_max": read I/O operations max (json-int)
+- "iops_wr_max": write I/O operations max (json-int)
Example:
@@ -1417,7 +1423,13 @@ Example:
"bps_wr": 0,
"iops": 0,
"iops_rd": 0,
- "iops_wr": 0 } }
+ "iops_wr": 0,
+ "bps_max": 8000000,
+ "bps_rd_max": 0,
+ "bps_wr_max": 0,
+ "iops_max": 0,
+ "iops_rd_max": 0,
+ "iops_wr_max": 0 } }
<- { "return": {} }
EQMP
@@ -1758,6 +1770,12 @@ Each json-object contain the following:
- "iops": limit total I/O operations per second (json-int)
- "iops_rd": limit read operations per second (json-int)
- "iops_wr": limit write operations per second (json-int)
+ - "bps_max": total max in bytes (json-int)
+ - "bps_rd_max": read max in bytes (json-int)
+ - "bps_wr_max": write max in bytes (json-int)
+ - "iops_max": total I/O operations max (json-int)
+ - "iops_rd_max": read I/O operations max (json-int)
+ - "iops_wr_max": write I/O operations max (json-int)
- "image": the detail of the image, it is a json-object containing
the following:
- "filename": image file name (json-string)
@@ -1827,6 +1845,12 @@ Example:
"iops":1000000,
"iops_rd":0,
"iops_wr":0,
+ "bps_max": 8000000,
+ "bps_rd_max": 0,
+ "bps_wr_max": 0,
+ "iops_max": 0,
+ "iops_rd_max": 0,
+ "iops_wr_max": 0,
"image":{
"filename":"disks/test.qcow2",
"format":"qcow2",
--
1.8.3.1
^ permalink raw reply related [flat|nested] 56+ messages in thread
* [Qemu-devel] [PULL 05/42] block: Add iops_size to do the iops accounting for a given io size.
2013-09-06 15:38 [Qemu-devel] [PULL 00/42] Block patches Stefan Hajnoczi
` (3 preceding siblings ...)
2013-09-06 15:38 ` [Qemu-devel] [PULL 04/42] block: Add support for throttling burst max in QMP and the command line Stefan Hajnoczi
@ 2013-09-06 15:38 ` Stefan Hajnoczi
2013-09-06 15:38 ` [Qemu-devel] [PULL 06/42] qemu-iotests: Adjust test result 039 Stefan Hajnoczi
` (36 subsequent siblings)
41 siblings, 0 replies; 56+ messages in thread
From: Stefan Hajnoczi @ 2013-09-06 15:38 UTC (permalink / raw)
To: qemu-devel; +Cc: Stefan Hajnoczi, Benoît Canet, Anthony Liguori
From: Benoît Canet <benoit@irqsave.net>
This feature can be used in case where users are avoiding the iops limit by
doing jumbo I/Os hammering the storage backend.
Signed-off-by: Benoit Canet <benoit@irqsave.net>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
block/qapi.c | 3 +++
blockdev.c | 17 ++++++++++++++---
hmp.c | 8 ++++++--
qapi-schema.json | 10 ++++++++--
qemu-options.hx | 1 +
qmp-commands.hx | 8 ++++++--
6 files changed, 38 insertions(+), 9 deletions(-)
diff --git a/block/qapi.c b/block/qapi.c
index b1edc66..782051c 100644
--- a/block/qapi.c
+++ b/block/qapi.c
@@ -258,6 +258,9 @@ void bdrv_query_info(BlockDriverState *bs,
cfg.buckets[THROTTLE_OPS_WRITE].max;
info->inserted->iops_wr_max =
cfg.buckets[THROTTLE_OPS_WRITE].max;
+
+ info->inserted->has_iops_size = cfg.op_size;
+ info->inserted->iops_size = cfg.op_size;
}
bs0 = bs;
diff --git a/blockdev.c b/blockdev.c
index 76e9308..fe2f318 100644
--- a/blockdev.c
+++ b/blockdev.c
@@ -507,7 +507,7 @@ static DriveInfo *blockdev_init(QemuOpts *all_opts,
cfg.buckets[THROTTLE_OPS_WRITE].max =
qemu_opt_get_number(opts, "throttling.iops-write-max", 0);
- cfg.op_size = 0;
+ cfg.op_size = qemu_opt_get_number(opts, "throttling.iops-size", 0);
if (!check_throttle_config(&cfg, &error)) {
error_report("%s", error_get_pretty(error));
@@ -774,6 +774,9 @@ DriveInfo *drive_init(QemuOpts *all_opts, BlockInterfaceType block_default_type)
qemu_opt_rename(all_opts, "bps_rd_max", "throttling.bps-read-max");
qemu_opt_rename(all_opts, "bps_wr_max", "throttling.bps-write-max");
+ qemu_opt_rename(all_opts,
+ "iops_size", "throttling.iops-size");
+
qemu_opt_rename(all_opts, "readonly", "read-only");
value = qemu_opt_get(all_opts, "cache");
@@ -1273,7 +1276,9 @@ void qmp_block_set_io_throttle(const char *device, int64_t bps, int64_t bps_rd,
bool has_iops_rd_max,
int64_t iops_rd_max,
bool has_iops_wr_max,
- int64_t iops_wr_max, Error **errp)
+ int64_t iops_wr_max,
+ bool has_iops_size,
+ int64_t iops_size, Error **errp)
{
ThrottleConfig cfg;
BlockDriverState *bs;
@@ -1312,7 +1317,9 @@ void qmp_block_set_io_throttle(const char *device, int64_t bps, int64_t bps_rd,
cfg.buckets[THROTTLE_OPS_WRITE].max = iops_wr_max;
}
- cfg.op_size = 0;
+ if (has_iops_size) {
+ cfg.op_size = iops_size;
+ }
if (!check_throttle_config(&cfg, errp)) {
return;
@@ -2038,6 +2045,10 @@ QemuOptsList qemu_common_drive_opts = {
.type = QEMU_OPT_NUMBER,
.help = "total bytes write burst",
},{
+ .name = "throttling.iops-size",
+ .type = QEMU_OPT_NUMBER,
+ .help = "when limiting by iops max size of an I/O in bytes",
+ },{
.name = "copy-on-read",
.type = QEMU_OPT_BOOL,
.help = "copy read data from backing file into image file",
diff --git a/hmp.c b/hmp.c
index 85a6c16..2bd31d1 100644
--- a/hmp.c
+++ b/hmp.c
@@ -351,7 +351,8 @@ void hmp_info_block(Monitor *mon, const QDict *qdict)
" iops_wr=%" PRId64
" iops_max=%" PRId64
" iops_rd_max=%" PRId64
- " iops_wr_max=%" PRId64 "\n",
+ " iops_wr_max=%" PRId64
+ " iops_size=%" PRId64 "\n",
info->value->inserted->bps,
info->value->inserted->bps_rd,
info->value->inserted->bps_wr,
@@ -363,7 +364,8 @@ void hmp_info_block(Monitor *mon, const QDict *qdict)
info->value->inserted->iops_wr,
info->value->inserted->iops_max,
info->value->inserted->iops_rd_max,
- info->value->inserted->iops_wr_max);
+ info->value->inserted->iops_wr_max,
+ info->value->inserted->iops_size);
} else {
monitor_printf(mon, " [not inserted]");
}
@@ -1124,6 +1126,8 @@ void hmp_block_set_io_throttle(Monitor *mon, const QDict *qdict)
false,
0,
false,
+ 0,
+ false, /* No default I/O size */
0, &err);
hmp_handle_error(mon, &err);
}
diff --git a/qapi-schema.json b/qapi-schema.json
index 6a9b8ca..5d5164f 100644
--- a/qapi-schema.json
+++ b/qapi-schema.json
@@ -797,6 +797,8 @@
#
# @iops_wr_max: #optional write I/O operations max (Since 1.7)
#
+# @iops_size: #optional an I/O size in bytes (Since 1.7)
+#
# Since: 0.14.0
#
# Notes: This interface is only found in @BlockInfo.
@@ -810,7 +812,8 @@
'image': 'ImageInfo',
'*bps_max': 'int', '*bps_rd_max': 'int',
'*bps_wr_max': 'int', '*iops_max': 'int',
- '*iops_rd_max': 'int', '*iops_wr_max': 'int' } }
+ '*iops_rd_max': 'int', '*iops_wr_max': 'int',
+ '*iops_size': 'int' } }
##
# @BlockDeviceIoStatus:
@@ -2201,6 +2204,8 @@
#
# @iops_wr_max: #optional write I/O operations max (Since 1.7)
#
+# @iops_size: #optional an I/O size in bytes (Since 1.7)
+#
# Returns: Nothing on success
# If @device is not a valid block device, DeviceNotFound
#
@@ -2211,7 +2216,8 @@
'iops': 'int', 'iops_rd': 'int', 'iops_wr': 'int',
'*bps_max': 'int', '*bps_rd_max': 'int',
'*bps_wr_max': 'int', '*iops_max': 'int',
- '*iops_rd_max': 'int', '*iops_wr_max': 'int' } }
+ '*iops_rd_max': 'int', '*iops_wr_max': 'int',
+ '*iops_size': 'int' } }
##
# @block-stream:
diff --git a/qemu-options.hx b/qemu-options.hx
index d3760df..5dc8b75 100644
--- a/qemu-options.hx
+++ b/qemu-options.hx
@@ -413,6 +413,7 @@ DEF("drive", HAS_ARG, QEMU_OPTION_drive,
" [[,iops=i]|[[,iops_rd=r][,iops_wr=w]]]\n"
" [[,bps_max=bm]|[[,bps_rd_max=rm][,bps_wr_max=wm]]]\n"
" [[,iops_max=im]|[[,iops_rd_max=irm][,iops_wr_max=iwm]]]\n"
+ " [[,iops_size=is]]\n"
" use 'file' as a drive image\n", QEMU_ARCH_ALL)
STEXI
@item -drive @var{option}[,@var{option}[,@var{option}[,...]]]
diff --git a/qmp-commands.hx b/qmp-commands.hx
index 7c9667b..008cad9 100644
--- a/qmp-commands.hx
+++ b/qmp-commands.hx
@@ -1389,7 +1389,7 @@ EQMP
{
.name = "block_set_io_throttle",
- .args_type = "device:B,bps:l,bps_rd:l,bps_wr:l,iops:l,iops_rd:l,iops_wr:l,bps_max:l?,bps_rd_max:l?,bps_wr_max:l?,iops_max:l?,iops_rd_max:l?,iops_wr_max:l?",
+ .args_type = "device:B,bps:l,bps_rd:l,bps_wr:l,iops:l,iops_rd:l,iops_wr:l,bps_max:l?,bps_rd_max:l?,bps_wr_max:l?,iops_max:l?,iops_rd_max:l?,iops_wr_max:l?,iops_size:l?",
.mhandler.cmd_new = qmp_marshal_input_block_set_io_throttle,
},
@@ -1414,6 +1414,7 @@ Arguments:
- "iops_max": total I/O operations max (json-int)
- "iops_rd_max": read I/O operations max (json-int)
- "iops_wr_max": write I/O operations max (json-int)
+- "iops_size": I/O size in bytes when limiting (json-int)
Example:
@@ -1429,7 +1430,8 @@ Example:
"bps_wr_max": 0,
"iops_max": 0,
"iops_rd_max": 0,
- "iops_wr_max": 0 } }
+ "iops_wr_max": 0,
+ "iops_size": 0 } }
<- { "return": {} }
EQMP
@@ -1776,6 +1778,7 @@ Each json-object contain the following:
- "iops_max": total I/O operations max (json-int)
- "iops_rd_max": read I/O operations max (json-int)
- "iops_wr_max": write I/O operations max (json-int)
+ - "iops_size": I/O size when limiting by iops (json-int)
- "image": the detail of the image, it is a json-object containing
the following:
- "filename": image file name (json-string)
@@ -1851,6 +1854,7 @@ Example:
"iops_max": 0,
"iops_rd_max": 0,
"iops_wr_max": 0,
+ "iops_size": 0,
"image":{
"filename":"disks/test.qcow2",
"format":"qcow2",
--
1.8.3.1
^ permalink raw reply related [flat|nested] 56+ messages in thread
* [Qemu-devel] [PULL 06/42] qemu-iotests: Adjust test result 039
2013-09-06 15:38 [Qemu-devel] [PULL 00/42] Block patches Stefan Hajnoczi
` (4 preceding siblings ...)
2013-09-06 15:38 ` [Qemu-devel] [PULL 05/42] block: Add iops_size to do the iops accounting for a given io size Stefan Hajnoczi
@ 2013-09-06 15:38 ` Stefan Hajnoczi
2013-09-06 15:38 ` [Qemu-devel] [PULL 07/42] add qemu-img convert -n option (skip target volume creation) Stefan Hajnoczi
` (35 subsequent siblings)
41 siblings, 0 replies; 56+ messages in thread
From: Stefan Hajnoczi @ 2013-09-06 15:38 UTC (permalink / raw)
To: qemu-devel; +Cc: Stefan Hajnoczi, Anthony Liguori, Max Reitz
From: Max Reitz <mreitz@redhat.com>
The moved OFLAG_COPIED check in qcow2_check_refcounts results in a
different output from test 039 (mismatches are now found after the
general refcount check (as far as any remain)). This patch adjusts the
expected test result accordingly.
Signed-off-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
tests/qemu-iotests/039.out | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/tests/qemu-iotests/039.out b/tests/qemu-iotests/039.out
index cb510d6..077fa64 100644
--- a/tests/qemu-iotests/039.out
+++ b/tests/qemu-iotests/039.out
@@ -12,8 +12,8 @@ Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728
wrote 512/512 bytes at offset 0
512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
incompatible_features 0x1
-ERROR OFLAG_COPIED: offset=8000000000050000 refcount=0
ERROR cluster 5 refcount=0 reference=1
+ERROR OFLAG_COPIED data cluster: l2_entry=8000000000050000 refcount=0
2 errors were found on the image.
Data may be corrupted, or further writes to the image may corrupt it.
@@ -24,7 +24,6 @@ read 512/512 bytes at offset 0
incompatible_features 0x1
== Repairing the image file must succeed ==
-ERROR OFLAG_COPIED: offset=8000000000050000 refcount=0
Repairing cluster 5 refcount=0 reference=1
The following inconsistencies were found and repaired:
@@ -44,7 +43,6 @@ Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728
wrote 512/512 bytes at offset 0
512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
incompatible_features 0x1
-ERROR OFLAG_COPIED: offset=8000000000050000 refcount=0
Repairing cluster 5 refcount=0 reference=1
wrote 512/512 bytes at offset 0
512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
--
1.8.3.1
^ permalink raw reply related [flat|nested] 56+ messages in thread
* [Qemu-devel] [PULL 07/42] add qemu-img convert -n option (skip target volume creation)
2013-09-06 15:38 [Qemu-devel] [PULL 00/42] Block patches Stefan Hajnoczi
` (5 preceding siblings ...)
2013-09-06 15:38 ` [Qemu-devel] [PULL 06/42] qemu-iotests: Adjust test result 039 Stefan Hajnoczi
@ 2013-09-06 15:38 ` Stefan Hajnoczi
2013-09-06 15:38 ` [Qemu-devel] [PULL 08/42] w32: Fix access to host devices (regression) Stefan Hajnoczi
` (34 subsequent siblings)
41 siblings, 0 replies; 56+ messages in thread
From: Stefan Hajnoczi @ 2013-09-06 15:38 UTC (permalink / raw)
To: qemu-devel
Cc: Alex Bligh, Stefan Hajnoczi, Alexandre Derumier, Anthony Liguori
From: Alexandre Derumier <aderumier@odiso.com>
Add a -n option to skip volume creation on qemu-img convert.
This is useful for targets such as rbd / ceph, where the
target volume may already exist; we cannot always rely on
qemu-img convert to create the image, as dependent on the
output format, there may be parameters which are not possible
to specify through the qemu-img convert command line.
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Alexandre Derumier <aderumier@odiso.com>
Signed-off-by: Alex Bligh <alex@alex.org.uk>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
qemu-img-cmds.hx | 4 +-
qemu-img.c | 53 ++++++++++++++++++-------
qemu-img.texi | 15 ++++++-
tests/qemu-iotests/063 | 97 ++++++++++++++++++++++++++++++++++++++++++++++
tests/qemu-iotests/063.out | 10 +++++
tests/qemu-iotests/group | 1 +
6 files changed, 162 insertions(+), 18 deletions(-)
create mode 100755 tests/qemu-iotests/063
create mode 100644 tests/qemu-iotests/063.out
diff --git a/qemu-img-cmds.hx b/qemu-img-cmds.hx
index 4ca7e95..2f6d579 100644
--- a/qemu-img-cmds.hx
+++ b/qemu-img-cmds.hx
@@ -34,9 +34,9 @@ STEXI
ETEXI
DEF("convert", img_convert,
- "convert [-c] [-p] [-q] [-f fmt] [-t cache] [-O output_fmt] [-o options] [-s snapshot_name] [-S sparse_size] filename [filename2 [...]] output_filename")
+ "convert [-c] [-p] [-q] [-n] [-f fmt] [-t cache] [-O output_fmt] [-o options] [-s snapshot_name] [-S sparse_size] filename [filename2 [...]] output_filename")
STEXI
-@item convert [-c] [-p] [-q] [-f @var{fmt}] [-t @var{cache}] [-O @var{output_fmt}] [-o @var{options}] [-s @var{snapshot_name}] [-S @var{sparse_size}] @var{filename} [@var{filename2} [...]] @var{output_filename}
+@item convert [-c] [-p] [-q] [-n] [-f @var{fmt}] [-t @var{cache}] [-O @var{output_fmt}] [-o @var{options}] [-s @var{snapshot_name}] [-S @var{sparse_size}] @var{filename} [@var{filename2} [...]] @var{output_filename}
ETEXI
DEF("info", img_info,
diff --git a/qemu-img.c b/qemu-img.c
index b9a848d..e790d6a 100644
--- a/qemu-img.c
+++ b/qemu-img.c
@@ -103,6 +103,8 @@ static void help(void)
" '-S' indicates the consecutive number of bytes that must contain only zeros\n"
" for qemu-img to create a sparse image during conversion\n"
" '--output' takes the format in which the output must be done (human or json)\n"
+ " '-n' skips the target volume creation (useful if the volume is created\n"
+ " prior to running qemu-img)\n"
"\n"
"Parameters to check subcommand:\n"
" '-r' tries to repair any inconsistencies that are found during the check.\n"
@@ -1116,7 +1118,8 @@ out3:
static int img_convert(int argc, char **argv)
{
- int c, ret = 0, n, n1, bs_n, bs_i, compress, cluster_size, cluster_sectors;
+ int c, ret = 0, n, n1, bs_n, bs_i, compress, cluster_size,
+ cluster_sectors, skip_create;
int progress = 0, flags;
const char *fmt, *out_fmt, *cache, *out_baseimg, *out_filename;
BlockDriver *drv, *proto_drv;
@@ -1139,8 +1142,9 @@ static int img_convert(int argc, char **argv)
cache = "unsafe";
out_baseimg = NULL;
compress = 0;
+ skip_create = 0;
for(;;) {
- c = getopt(argc, argv, "f:O:B:s:hce6o:pS:t:q");
+ c = getopt(argc, argv, "f:O:B:s:hce6o:pS:t:qn");
if (c == -1) {
break;
}
@@ -1197,6 +1201,9 @@ static int img_convert(int argc, char **argv)
case 'q':
quiet = true;
break;
+ case 'n':
+ skip_create = 1;
+ break;
}
}
@@ -1329,20 +1336,22 @@ static int img_convert(int argc, char **argv)
}
}
- /* Create the new image */
- ret = bdrv_create(drv, out_filename, param);
- if (ret < 0) {
- if (ret == -ENOTSUP) {
- error_report("Formatting not supported for file format '%s'",
- out_fmt);
- } else if (ret == -EFBIG) {
- error_report("The image size is too large for file format '%s'",
- out_fmt);
- } else {
- error_report("%s: error while converting %s: %s",
- out_filename, out_fmt, strerror(-ret));
+ if (!skip_create) {
+ /* Create the new image */
+ ret = bdrv_create(drv, out_filename, param);
+ if (ret < 0) {
+ if (ret == -ENOTSUP) {
+ error_report("Formatting not supported for file format '%s'",
+ out_fmt);
+ } else if (ret == -EFBIG) {
+ error_report("The image size is too large for file format '%s'",
+ out_fmt);
+ } else {
+ error_report("%s: error while converting %s: %s",
+ out_filename, out_fmt, strerror(-ret));
+ }
+ goto out;
}
- goto out;
}
flags = BDRV_O_RDWR;
@@ -1363,6 +1372,20 @@ static int img_convert(int argc, char **argv)
bdrv_get_geometry(bs[0], &bs_sectors);
buf = qemu_blockalign(out_bs, IO_BUF_SIZE);
+ if (skip_create) {
+ int64_t output_length = bdrv_getlength(out_bs);
+ if (output_length < 0) {
+ error_report("unable to get output image length: %s\n",
+ strerror(-output_length));
+ ret = -1;
+ goto out;
+ } else if (output_length < total_sectors << BDRV_SECTOR_BITS) {
+ error_report("output file is smaller than input file");
+ ret = -1;
+ goto out;
+ }
+ }
+
if (compress) {
ret = bdrv_get_info(out_bs, &bdi);
if (ret < 0) {
diff --git a/qemu-img.texi b/qemu-img.texi
index 69f1bda..ad45a6d 100644
--- a/qemu-img.texi
+++ b/qemu-img.texi
@@ -96,6 +96,14 @@ Second image format
Strict mode - fail on on different image size or sector allocation
@end table
+Parameters to convert subcommand:
+
+@table @option
+
+@item -n
+Skip the creation of the target volume
+@end table
+
Command description:
@table @option
@@ -171,7 +179,7 @@ Error on reading data
@end table
-@item convert [-c] [-p] [-f @var{fmt}] [-t @var{cache}] [-O @var{output_fmt}] [-o @var{options}] [-s @var{snapshot_name}] [-S @var{sparse_size}] @var{filename} [@var{filename2} [...]] @var{output_filename}
+@item convert [-c] [-p] [-n] [-f @var{fmt}] [-t @var{cache}] [-O @var{output_fmt}] [-o @var{options}] [-s @var{snapshot_name}] [-S @var{sparse_size}] @var{filename} [@var{filename2} [...]] @var{output_filename}
Convert the disk image @var{filename} or a snapshot @var{snapshot_name} to disk image @var{output_filename}
using format @var{output_fmt}. It can be optionally compressed (@code{-c}
@@ -190,6 +198,11 @@ created as a copy on write image of the specified base image; the
@var{backing_file} should have the same content as the input's base image,
however the path, image format, etc may differ.
+If the @code{-n} option is specified, the target volume creation will be
+skipped. This is useful for formats such as @code{rbd} if the target
+volume has already been created with site specific options that cannot
+be supplied through qemu-img.
+
@item info [-f @var{fmt}] [--output=@var{ofmt}] [--backing-chain] @var{filename}
Give information about the disk image @var{filename}. Use it in
diff --git a/tests/qemu-iotests/063 b/tests/qemu-iotests/063
new file mode 100755
index 0000000..de0cbbd
--- /dev/null
+++ b/tests/qemu-iotests/063
@@ -0,0 +1,97 @@
+#!/bin/bash
+#
+# test of qemu-img convert -n - convert without creation
+#
+# Copyright (C) 2009 Red Hat, Inc.
+# Copyright (C) 2013 Alex Bligh (alex@alex.org.uk)
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+#
+
+# creator
+owner=alex@alex.org.uk
+
+seq=`basename $0`
+echo "QA output created by $seq"
+
+here=`pwd`
+tmp=/tmp/$$
+status=1 # failure is the default!
+
+_cleanup()
+{
+ _cleanup_test_img
+ rm -f $TEST_IMG.orig $TEST_IMG.raw $TEST_IMG.raw2
+}
+trap "_cleanup; exit \$status" 0 1 2 3 15
+
+# get standard environment, filters and checks
+. ./common.rc
+. ./common.filter
+. ./common.pattern
+
+_supported_fmt qcow qcow2 vmdk qed raw
+_supported_proto generic
+_supported_os Linux
+
+_make_test_img 4M
+
+echo "== Testing conversion with -n fails with no target file =="
+# check .orig file does not exist
+rm -f $TEST_IMG.orig
+if $QEMU_IMG convert -f $IMGFMT -O $IMGFMT -n $TEST_IMG $TEST_IMG.orig >/dev/null 2>&1; then
+ exit 1
+fi
+
+echo "== Testing conversion with -n succeeds with a target file =="
+rm -f $TEST_IMG.orig
+cp $TEST_IMG $TEST_IMG.orig
+if ! $QEMU_IMG convert -f $IMGFMT -O $IMGFMT -n $TEST_IMG $TEST_IMG.orig ; then
+ exit 1
+fi
+
+echo "== Testing conversion to raw is the same after conversion with -n =="
+# compare the raw files
+if ! $QEMU_IMG convert -f $IMGFMT -O raw $TEST_IMG $TEST_IMG.raw1 ; then
+ exit 1
+fi
+
+if ! $QEMU_IMG convert -f $IMGFMT -O raw $TEST_IMG.orig $TEST_IMG.raw2 ; then
+ exit 1
+fi
+
+if ! cmp $TEST_IMG.raw1 $TEST_IMG.raw2 ; then
+ exit 1
+fi
+
+echo "== Testing conversion back to original format =="
+if ! $QEMU_IMG convert -f raw -O $IMGFMT -n $TEST_IMG.raw2 $TEST_IMG ; then
+ exit 1
+fi
+_check_test_img
+
+echo "== Testing conversion to a smaller file fails =="
+rm -f $TEST_IMG.orig
+mv $TEST_IMG $TEST_IMG.orig
+_make_test_img 2M
+if $QEMU_IMG convert -f $IMGFMT -O $IMGFMT -n $TEST_IMG.orig $TEST_IMG >/dev/null 2>&1; then
+ exit 1
+fi
+
+rm -f $TEST_IMG.orig $TEST_IMG.raw $TEST_IMG.raw2
+
+echo "*** done"
+rm -f $seq.full
+status=0
+exit 0
diff --git a/tests/qemu-iotests/063.out b/tests/qemu-iotests/063.out
new file mode 100644
index 0000000..de1c99a
--- /dev/null
+++ b/tests/qemu-iotests/063.out
@@ -0,0 +1,10 @@
+QA output created by 063
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=4194304
+== Testing conversion with -n fails with no target file ==
+== Testing conversion with -n succeeds with a target file ==
+== Testing conversion to raw is the same after conversion with -n ==
+== Testing conversion back to original format ==
+No errors were found on the image.
+== Testing conversion to a smaller file fails ==
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=2097152
+*** done
diff --git a/tests/qemu-iotests/group b/tests/qemu-iotests/group
index b696242..316b1dd 100644
--- a/tests/qemu-iotests/group
+++ b/tests/qemu-iotests/group
@@ -66,3 +66,4 @@
059 rw auto
060 rw auto
062 rw auto
+063 rw auto
--
1.8.3.1
^ permalink raw reply related [flat|nested] 56+ messages in thread
* [Qemu-devel] [PULL 08/42] w32: Fix access to host devices (regression)
2013-09-06 15:38 [Qemu-devel] [PULL 00/42] Block patches Stefan Hajnoczi
` (6 preceding siblings ...)
2013-09-06 15:38 ` [Qemu-devel] [PULL 07/42] add qemu-img convert -n option (skip target volume creation) Stefan Hajnoczi
@ 2013-09-06 15:38 ` Stefan Hajnoczi
2013-09-06 15:38 ` [Qemu-devel] [PULL 09/42] aio / timers: fix build of test/test-aio.c on non-linux platforms Stefan Hajnoczi
` (33 subsequent siblings)
41 siblings, 0 replies; 56+ messages in thread
From: Stefan Hajnoczi @ 2013-09-06 15:38 UTC (permalink / raw)
To: qemu-devel; +Cc: Stefan Weil, Stefan Hajnoczi, qemu-stable, Anthony Liguori
From: Stefan Weil <sw@weilnetz.de>
QEMU failed to open host devices like \\.\PhysicalDrive0 (first hard disk)
since some time (commit 8a79380b8ef1b02d2abd705dd026a18863b09020?).
Those devices use hdev_open which did not use the latest API for options.
This resulted in a fatal runtime error:
Block protocol 'host_device' doesn't support the option 'filename'
Duplicate code from raw_open to fix this.
Cc: qemu-stable@nongnu.org
Reported-by: David Brenner <david.brenner3@gmail.com>
Signed-off-by: Stefan Weil <sw@weilnetz.de>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
block/raw-win32.c | 36 +++++++++++++++++++++++++++++-------
1 file changed, 29 insertions(+), 7 deletions(-)
diff --git a/block/raw-win32.c b/block/raw-win32.c
index 9b5b2af..d2d2d9f 100644
--- a/block/raw-win32.c
+++ b/block/raw-win32.c
@@ -535,13 +535,29 @@ static int hdev_open(BlockDriverState *bs, QDict *options, int flags)
{
BDRVRawState *s = bs->opaque;
int access_flags, create_flags;
+ int ret = 0;
DWORD overlapped;
char device_name[64];
- const char *filename = qdict_get_str(options, "filename");
+
+ Error *local_err = NULL;
+ const char *filename;
+
+ QemuOpts *opts = qemu_opts_create_nofail(&raw_runtime_opts);
+ qemu_opts_absorb_qdict(opts, options, &local_err);
+ if (error_is_set(&local_err)) {
+ qerror_report_err(local_err);
+ error_free(local_err);
+ ret = -EINVAL;
+ goto done;
+ }
+
+ filename = qemu_opt_get(opts, "filename");
if (strstart(filename, "/dev/cdrom", NULL)) {
- if (find_cdrom(device_name, sizeof(device_name)) < 0)
- return -ENOENT;
+ if (find_cdrom(device_name, sizeof(device_name)) < 0) {
+ ret = -ENOENT;
+ goto done;
+ }
filename = device_name;
} else {
/* transform drive letters into device name */
@@ -564,11 +580,17 @@ static int hdev_open(BlockDriverState *bs, QDict *options, int flags)
if (s->hfile == INVALID_HANDLE_VALUE) {
int err = GetLastError();
- if (err == ERROR_ACCESS_DENIED)
- return -EACCES;
- return -1;
+ if (err == ERROR_ACCESS_DENIED) {
+ ret = -EACCES;
+ } else {
+ ret = -1;
+ }
+ goto done;
}
- return 0;
+
+done:
+ qemu_opts_del(opts);
+ return ret;
}
static BlockDriver bdrv_host_device = {
--
1.8.3.1
^ permalink raw reply related [flat|nested] 56+ messages in thread
* [Qemu-devel] [PULL 09/42] aio / timers: fix build of test/test-aio.c on non-linux platforms
2013-09-06 15:38 [Qemu-devel] [PULL 00/42] Block patches Stefan Hajnoczi
` (7 preceding siblings ...)
2013-09-06 15:38 ` [Qemu-devel] [PULL 08/42] w32: Fix access to host devices (regression) Stefan Hajnoczi
@ 2013-09-06 15:38 ` Stefan Hajnoczi
2013-09-06 15:38 ` [Qemu-devel] [PULL 10/42] vvfat: use bdrv_new() to allocate BlockDriverState Stefan Hajnoczi
` (32 subsequent siblings)
41 siblings, 0 replies; 56+ messages in thread
From: Stefan Hajnoczi @ 2013-09-06 15:38 UTC (permalink / raw)
To: qemu-devel; +Cc: Stefan Hajnoczi, Alex Bligh, Anthony Liguori
From: Alex Bligh <alex@alex.org.uk>
tests/test-aio.c used pipe2 which is Linux only. Use qemu_pipe
and qemu_set_nonblock for portabillity. Addition of O_CLOEXEC
is a harmless bonus.
Signed-off-by: Alex Bligh <alex@alex.org.uk>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
tests/test-aio.c | 11 +++++++++--
1 file changed, 9 insertions(+), 2 deletions(-)
diff --git a/tests/test-aio.c b/tests/test-aio.c
index 532a1de..c4fe0fc 100644
--- a/tests/test-aio.c
+++ b/tests/test-aio.c
@@ -13,6 +13,7 @@
#include <glib.h>
#include "block/aio.h"
#include "qemu/timer.h"
+#include "qemu/sockets.h"
AioContext *ctx;
@@ -375,7 +376,10 @@ static void test_timer_schedule(void)
/* aio_poll will not block to wait for timers to complete unless it has
* an fd to wait on. Fixing this breaks other tests. So create a dummy one.
*/
- g_assert(!pipe2(pipefd, O_NONBLOCK));
+ g_assert(!qemu_pipe(pipefd));
+ qemu_set_nonblock(pipefd[0]);
+ qemu_set_nonblock(pipefd[1]);
+
aio_set_fd_handler(ctx, pipefd[0],
dummy_io_handler_read, NULL, NULL);
aio_poll(ctx, false);
@@ -716,7 +720,10 @@ static void test_source_timer_schedule(void)
/* aio_poll will not block to wait for timers to complete unless it has
* an fd to wait on. Fixing this breaks other tests. So create a dummy one.
*/
- g_assert(!pipe2(pipefd, O_NONBLOCK));
+ g_assert(!qemu_pipe(pipefd));
+ qemu_set_nonblock(pipefd[0]);
+ qemu_set_nonblock(pipefd[1]);
+
aio_set_fd_handler(ctx, pipefd[0],
dummy_io_handler_read, NULL, NULL);
do {} while (g_main_context_iteration(NULL, false));
--
1.8.3.1
^ permalink raw reply related [flat|nested] 56+ messages in thread
* [Qemu-devel] [PULL 10/42] vvfat: use bdrv_new() to allocate BlockDriverState
2013-09-06 15:38 [Qemu-devel] [PULL 00/42] Block patches Stefan Hajnoczi
` (8 preceding siblings ...)
2013-09-06 15:38 ` [Qemu-devel] [PULL 09/42] aio / timers: fix build of test/test-aio.c on non-linux platforms Stefan Hajnoczi
@ 2013-09-06 15:38 ` Stefan Hajnoczi
2013-09-06 15:38 ` [Qemu-devel] [PULL 11/42] iscsi: use bdrv_new() instead of stack structure Stefan Hajnoczi
` (31 subsequent siblings)
41 siblings, 0 replies; 56+ messages in thread
From: Stefan Hajnoczi @ 2013-09-06 15:38 UTC (permalink / raw)
To: qemu-devel; +Cc: Fam Zheng, Stefan Hajnoczi, Anthony Liguori
From: Fam Zheng <famz@redhat.com>
we need bdrv_new() to properly initialize BDS, don't allocate memory
manually.
Signed-off-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
block/vvfat.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/block/vvfat.c b/block/vvfat.c
index cd3b8ed..a827d91 100644
--- a/block/vvfat.c
+++ b/block/vvfat.c
@@ -2943,7 +2943,7 @@ static int enable_write_target(BDRVVVFATState *s)
unlink(s->qcow_filename);
#endif
- s->bs->backing_hd = calloc(sizeof(BlockDriverState), 1);
+ s->bs->backing_hd = bdrv_new("");
s->bs->backing_hd->drv = &vvfat_write_target;
s->bs->backing_hd->opaque = g_malloc(sizeof(void*));
*(void**)s->bs->backing_hd->opaque = s;
--
1.8.3.1
^ permalink raw reply related [flat|nested] 56+ messages in thread
* [Qemu-devel] [PULL 11/42] iscsi: use bdrv_new() instead of stack structure
2013-09-06 15:38 [Qemu-devel] [PULL 00/42] Block patches Stefan Hajnoczi
` (9 preceding siblings ...)
2013-09-06 15:38 ` [Qemu-devel] [PULL 10/42] vvfat: use bdrv_new() to allocate BlockDriverState Stefan Hajnoczi
@ 2013-09-06 15:38 ` Stefan Hajnoczi
2013-09-06 15:38 ` [Qemu-devel] [PULL 12/42] block: implement reference count for BlockDriverState Stefan Hajnoczi
` (30 subsequent siblings)
41 siblings, 0 replies; 56+ messages in thread
From: Stefan Hajnoczi @ 2013-09-06 15:38 UTC (permalink / raw)
To: qemu-devel; +Cc: Fam Zheng, Stefan Hajnoczi, Anthony Liguori
From: Fam Zheng <famz@redhat.com>
BlockDriverState structure needs bdrv_new() to initialize refcnt, don't
allocate a local structure variable and memset to 0, becasue with coming
refcnt implementation, bdrv_unref will crash if bs->refcnt not
initialized to 1.
Signed-off-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
block/iscsi.c | 16 +++++++++-------
1 file changed, 9 insertions(+), 7 deletions(-)
diff --git a/block/iscsi.c b/block/iscsi.c
index 2bbee1f..b2be147 100644
--- a/block/iscsi.c
+++ b/block/iscsi.c
@@ -1241,11 +1241,11 @@ static int iscsi_create(const char *filename, QEMUOptionParameter *options)
{
int ret = 0;
int64_t total_size = 0;
- BlockDriverState bs;
+ BlockDriverState *bs;
IscsiLun *iscsilun = NULL;
QDict *bs_options;
- memset(&bs, 0, sizeof(BlockDriverState));
+ bs = bdrv_new("");
/* Read out options */
while (options && options->name) {
@@ -1255,12 +1255,12 @@ static int iscsi_create(const char *filename, QEMUOptionParameter *options)
options++;
}
- bs.opaque = g_malloc0(sizeof(struct IscsiLun));
- iscsilun = bs.opaque;
+ bs->opaque = g_malloc0(sizeof(struct IscsiLun));
+ iscsilun = bs->opaque;
bs_options = qdict_new();
qdict_put(bs_options, "filename", qstring_from_str(filename));
- ret = iscsi_open(&bs, bs_options, 0);
+ ret = iscsi_open(bs, bs_options, 0);
QDECREF(bs_options);
if (ret != 0) {
@@ -1274,7 +1274,7 @@ static int iscsi_create(const char *filename, QEMUOptionParameter *options)
ret = -ENODEV;
goto out;
}
- if (bs.total_sectors < total_size) {
+ if (bs->total_sectors < total_size) {
ret = -ENOSPC;
goto out;
}
@@ -1284,7 +1284,9 @@ out:
if (iscsilun->iscsi != NULL) {
iscsi_destroy_context(iscsilun->iscsi);
}
- g_free(bs.opaque);
+ g_free(bs->opaque);
+ bs->opaque = NULL;
+ bdrv_delete(bs);
return ret;
}
--
1.8.3.1
^ permalink raw reply related [flat|nested] 56+ messages in thread
* [Qemu-devel] [PULL 12/42] block: implement reference count for BlockDriverState
2013-09-06 15:38 [Qemu-devel] [PULL 00/42] Block patches Stefan Hajnoczi
` (10 preceding siblings ...)
2013-09-06 15:38 ` [Qemu-devel] [PULL 11/42] iscsi: use bdrv_new() instead of stack structure Stefan Hajnoczi
@ 2013-09-06 15:38 ` Stefan Hajnoczi
2013-09-06 15:38 ` [Qemu-devel] [PULL 13/42] block: make bdrv_delete() static Stefan Hajnoczi
` (29 subsequent siblings)
41 siblings, 0 replies; 56+ messages in thread
From: Stefan Hajnoczi @ 2013-09-06 15:38 UTC (permalink / raw)
To: qemu-devel; +Cc: Fam Zheng, Stefan Hajnoczi, Anthony Liguori
From: Fam Zheng <famz@redhat.com>
Introduce bdrv_ref/bdrv_unref to manage the lifecycle of
BlockDriverState. They are unused for now but will used to replace
bdrv_delete() later.
Signed-off-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
block.c | 21 +++++++++++++++++++++
include/block/block.h | 2 ++
include/block/block_int.h | 1 +
3 files changed, 24 insertions(+)
diff --git a/block.c b/block.c
index 0292d1d..a2b6003 100644
--- a/block.c
+++ b/block.c
@@ -332,6 +332,7 @@ BlockDriverState *bdrv_new(const char *device_name)
notifier_with_return_list_init(&bs->before_write_notifiers);
qemu_co_queue_init(&bs->throttled_reqs[0]);
qemu_co_queue_init(&bs->throttled_reqs[1]);
+ bs->refcnt = 1;
return bs;
}
@@ -1566,6 +1567,9 @@ static void bdrv_move_feature_fields(BlockDriverState *bs_dest,
/* dirty bitmap */
bs_dest->dirty_bitmap = bs_src->dirty_bitmap;
+ /* reference count */
+ bs_dest->refcnt = bs_src->refcnt;
+
/* job */
bs_dest->in_use = bs_src->in_use;
bs_dest->job = bs_src->job;
@@ -4297,6 +4301,23 @@ int64_t bdrv_get_dirty_count(BlockDriverState *bs)
}
}
+/* Get a reference to bs */
+void bdrv_ref(BlockDriverState *bs)
+{
+ bs->refcnt++;
+}
+
+/* Release a previously grabbed reference to bs.
+ * If after releasing, reference count is zero, the BlockDriverState is
+ * deleted. */
+void bdrv_unref(BlockDriverState *bs)
+{
+ assert(bs->refcnt > 0);
+ if (--bs->refcnt == 0) {
+ bdrv_delete(bs);
+ }
+}
+
void bdrv_set_in_use(BlockDriverState *bs, int in_use)
{
assert(bs->in_use != in_use);
diff --git a/include/block/block.h b/include/block/block.h
index 6207ff2..f24e1ff 100644
--- a/include/block/block.h
+++ b/include/block/block.h
@@ -355,6 +355,8 @@ int64_t bdrv_get_dirty_count(BlockDriverState *bs);
void bdrv_enable_copy_on_read(BlockDriverState *bs);
void bdrv_disable_copy_on_read(BlockDriverState *bs);
+void bdrv_ref(BlockDriverState *bs);
+void bdrv_unref(BlockDriverState *bs);
void bdrv_set_in_use(BlockDriverState *bs, int in_use);
int bdrv_in_use(BlockDriverState *bs);
diff --git a/include/block/block_int.h b/include/block/block_int.h
index c3c9c61..b9212b8 100644
--- a/include/block/block_int.h
+++ b/include/block/block_int.h
@@ -277,6 +277,7 @@ struct BlockDriverState {
BlockDeviceIoStatus iostatus;
char device_name[32];
HBitmap *dirty_bitmap;
+ int refcnt;
int in_use; /* users other than guest access, eg. block migration */
QTAILQ_ENTRY(BlockDriverState) list;
--
1.8.3.1
^ permalink raw reply related [flat|nested] 56+ messages in thread
* [Qemu-devel] [PULL 13/42] block: make bdrv_delete() static
2013-09-06 15:38 [Qemu-devel] [PULL 00/42] Block patches Stefan Hajnoczi
` (11 preceding siblings ...)
2013-09-06 15:38 ` [Qemu-devel] [PULL 12/42] block: implement reference count for BlockDriverState Stefan Hajnoczi
@ 2013-09-06 15:38 ` Stefan Hajnoczi
2013-09-06 15:38 ` [Qemu-devel] [PULL 14/42] migration: omit drive ref as we have bdrv_ref now Stefan Hajnoczi
` (28 subsequent siblings)
41 siblings, 0 replies; 56+ messages in thread
From: Stefan Hajnoczi @ 2013-09-06 15:38 UTC (permalink / raw)
To: qemu-devel; +Cc: Fam Zheng, Stefan Hajnoczi, Anthony Liguori
From: Fam Zheng <famz@redhat.com>
Manage BlockDriverState lifecycle with refcnt, so bdrv_delete() is no
longer public and should be called by bdrv_unref() if refcnt is
decreased to 0.
This is an identical change because effectively, there's no multiple
reference of BDS now: no caller of bdrv_ref() yet, only bdrv_new() sets
bs->refcnt to 1, so all bdrv_unref() now actually delete the BDS.
Signed-off-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
block.c | 23 ++++++++++++-----------
block/backup.c | 2 +-
block/blkverify.c | 4 ++--
block/cow.c | 2 +-
block/iscsi.c | 2 +-
block/mirror.c | 2 +-
block/qcow.c | 2 +-
block/qcow2.c | 2 +-
block/qed.c | 2 +-
block/sheepdog.c | 6 +++---
block/snapshot.c | 2 +-
block/stream.c | 2 +-
block/vmdk.c | 10 +++++-----
block/vvfat.c | 4 ++--
blockdev.c | 14 +++++++-------
hw/block/xen_disk.c | 4 ++--
include/block/block.h | 1 -
qemu-img.c | 26 +++++++++++++-------------
qemu-io.c | 6 +++---
19 files changed, 58 insertions(+), 58 deletions(-)
diff --git a/block.c b/block.c
index a2b6003..905bf34 100644
--- a/block.c
+++ b/block.c
@@ -903,7 +903,7 @@ fail:
if (!bs->drv) {
QDECREF(bs->options);
}
- bdrv_delete(bs);
+ bdrv_unref(bs);
return ret;
}
@@ -954,7 +954,7 @@ int bdrv_open_backing_file(BlockDriverState *bs, QDict *options)
*backing_filename ? backing_filename : NULL, options,
back_flags, back_drv);
if (ret < 0) {
- bdrv_delete(bs->backing_hd);
+ bdrv_unref(bs->backing_hd);
bs->backing_hd = NULL;
bs->open_flags |= BDRV_O_NO_BACKING;
return ret;
@@ -1029,12 +1029,12 @@ int bdrv_open(BlockDriverState *bs, const char *filename, QDict *options,
bs1 = bdrv_new("");
ret = bdrv_open(bs1, filename, NULL, 0, drv);
if (ret < 0) {
- bdrv_delete(bs1);
+ bdrv_unref(bs1);
goto fail;
}
total_size = bdrv_getlength(bs1) & BDRV_SECTOR_MASK;
- bdrv_delete(bs1);
+ bdrv_unref(bs1);
ret = get_tmp_filename(tmp_filename, sizeof(tmp_filename));
if (ret < 0) {
@@ -1108,7 +1108,7 @@ int bdrv_open(BlockDriverState *bs, const char *filename, QDict *options,
}
if (bs->file != file) {
- bdrv_delete(file);
+ bdrv_unref(file);
file = NULL;
}
@@ -1143,7 +1143,7 @@ int bdrv_open(BlockDriverState *bs, const char *filename, QDict *options,
unlink_and_fail:
if (file != NULL) {
- bdrv_delete(file);
+ bdrv_unref(file);
}
if (bs->is_temporary) {
unlink(filename);
@@ -1404,7 +1404,7 @@ void bdrv_close(BlockDriverState *bs)
if (bs->drv) {
if (bs->backing_hd) {
- bdrv_delete(bs->backing_hd);
+ bdrv_unref(bs->backing_hd);
bs->backing_hd = NULL;
}
bs->drv->bdrv_close(bs);
@@ -1429,7 +1429,7 @@ void bdrv_close(BlockDriverState *bs)
bs->options = NULL;
if (bs->file != NULL) {
- bdrv_delete(bs->file);
+ bdrv_unref(bs->file);
bs->file = NULL;
}
}
@@ -1653,11 +1653,12 @@ void bdrv_append(BlockDriverState *bs_new, BlockDriverState *bs_top)
bs_new->drv ? bs_new->drv->format_name : "");
}
-void bdrv_delete(BlockDriverState *bs)
+static void bdrv_delete(BlockDriverState *bs)
{
assert(!bs->dev);
assert(!bs->job);
assert(!bs->in_use);
+ assert(!bs->refcnt);
bdrv_close(bs);
@@ -2173,7 +2174,7 @@ int bdrv_drop_intermediate(BlockDriverState *active, BlockDriverState *top,
QSIMPLEQ_FOREACH_SAFE(intermediate_state, &states_to_delete, entry, next) {
/* so that bdrv_close() does not recursively close the chain */
intermediate_state->bs->backing_hd = NULL;
- bdrv_delete(intermediate_state->bs);
+ bdrv_unref(intermediate_state->bs);
}
ret = 0;
@@ -4531,7 +4532,7 @@ out:
free_option_parameters(param);
if (bs) {
- bdrv_delete(bs);
+ bdrv_unref(bs);
}
}
diff --git a/block/backup.c b/block/backup.c
index 23c7264..47fb23f 100644
--- a/block/backup.c
+++ b/block/backup.c
@@ -338,7 +338,7 @@ static void coroutine_fn backup_run(void *opaque)
hbitmap_free(job->bitmap);
bdrv_iostatus_disable(target);
- bdrv_delete(target);
+ bdrv_unref(target);
block_job_completed(&job->common, ret);
}
diff --git a/block/blkverify.c b/block/blkverify.c
index 1d58cc3..c4e961e 100644
--- a/block/blkverify.c
+++ b/block/blkverify.c
@@ -155,7 +155,7 @@ static int blkverify_open(BlockDriverState *bs, QDict *options, int flags)
s->test_file = bdrv_new("");
ret = bdrv_open(s->test_file, filename, NULL, flags, NULL);
if (ret < 0) {
- bdrv_delete(s->test_file);
+ bdrv_unref(s->test_file);
s->test_file = NULL;
goto fail;
}
@@ -169,7 +169,7 @@ static void blkverify_close(BlockDriverState *bs)
{
BDRVBlkverifyState *s = bs->opaque;
- bdrv_delete(s->test_file);
+ bdrv_unref(s->test_file);
s->test_file = NULL;
}
diff --git a/block/cow.c b/block/cow.c
index 1cc2e89..767639c 100644
--- a/block/cow.c
+++ b/block/cow.c
@@ -314,7 +314,7 @@ static int cow_create(const char *filename, QEMUOptionParameter *options)
}
exit:
- bdrv_delete(cow_bs);
+ bdrv_unref(cow_bs);
return ret;
}
diff --git a/block/iscsi.c b/block/iscsi.c
index b2be147..813abd8 100644
--- a/block/iscsi.c
+++ b/block/iscsi.c
@@ -1286,7 +1286,7 @@ out:
}
g_free(bs->opaque);
bs->opaque = NULL;
- bdrv_delete(bs);
+ bdrv_unref(bs);
return ret;
}
diff --git a/block/mirror.c b/block/mirror.c
index 86de458..8dbc5f7 100644
--- a/block/mirror.c
+++ b/block/mirror.c
@@ -480,7 +480,7 @@ immediate_exit:
bdrv_swap(s->target, s->common.bs);
}
bdrv_close(s->target);
- bdrv_delete(s->target);
+ bdrv_unref(s->target);
block_job_completed(&s->common, ret);
}
diff --git a/block/qcow.c b/block/qcow.c
index 5239bd6..6b891ac 100644
--- a/block/qcow.c
+++ b/block/qcow.c
@@ -751,7 +751,7 @@ static int qcow_create(const char *filename, QEMUOptionParameter *options)
g_free(tmp);
ret = 0;
exit:
- bdrv_delete(qcow_bs);
+ bdrv_unref(qcow_bs);
return ret;
}
diff --git a/block/qcow2.c b/block/qcow2.c
index 4bc679a..4d7bd78 100644
--- a/block/qcow2.c
+++ b/block/qcow2.c
@@ -1452,7 +1452,7 @@ static int qcow2_create2(const char *filename, int64_t total_size,
ret = 0;
out:
- bdrv_delete(bs);
+ bdrv_unref(bs);
return ret;
}
diff --git a/block/qed.c b/block/qed.c
index cc904c4..9712a42 100644
--- a/block/qed.c
+++ b/block/qed.c
@@ -599,7 +599,7 @@ static int qed_create(const char *filename, uint32_t cluster_size,
ret = 0; /* success */
out:
g_free(l1_table);
- bdrv_delete(bs);
+ bdrv_unref(bs);
return ret;
}
diff --git a/block/sheepdog.c b/block/sheepdog.c
index 1ad4d07..36c3cc8 100644
--- a/block/sheepdog.c
+++ b/block/sheepdog.c
@@ -1430,7 +1430,7 @@ static int sd_prealloc(const char *filename)
}
out:
if (bs) {
- bdrv_delete(bs);
+ bdrv_unref(bs);
}
g_free(buf);
@@ -1509,13 +1509,13 @@ static int sd_create(const char *filename, QEMUOptionParameter *options)
if (!is_snapshot(&s->inode)) {
error_report("cannot clone from a non snapshot vdi");
- bdrv_delete(bs);
+ bdrv_unref(bs);
ret = -EINVAL;
goto out;
}
base_vid = s->inode.vdi_id;
- bdrv_delete(bs);
+ bdrv_unref(bs);
}
ret = do_sd_create(s, vdi, vdi_size, base_vid, &vid, 0);
diff --git a/block/snapshot.c b/block/snapshot.c
index 6c6d9de..8f61cc0 100644
--- a/block/snapshot.c
+++ b/block/snapshot.c
@@ -99,7 +99,7 @@ int bdrv_snapshot_goto(BlockDriverState *bs,
ret = bdrv_snapshot_goto(bs->file, snapshot_id);
open_ret = drv->bdrv_open(bs, NULL, bs->open_flags);
if (open_ret < 0) {
- bdrv_delete(bs->file);
+ bdrv_unref(bs->file);
bs->drv = NULL;
return open_ret;
}
diff --git a/block/stream.c b/block/stream.c
index 9982125..7aa2500 100644
--- a/block/stream.c
+++ b/block/stream.c
@@ -73,7 +73,7 @@ static void close_unused_images(BlockDriverState *top, BlockDriverState *base,
unused = intermediate;
intermediate = intermediate->backing_hd;
unused->backing_hd = NULL;
- bdrv_delete(unused);
+ bdrv_unref(unused);
}
}
diff --git a/block/vmdk.c b/block/vmdk.c
index 63b489d..9f82c45 100644
--- a/block/vmdk.c
+++ b/block/vmdk.c
@@ -216,7 +216,7 @@ static void vmdk_free_extents(BlockDriverState *bs)
g_free(e->l2_cache);
g_free(e->l1_backup_table);
if (e->file != bs->file) {
- bdrv_delete(e->file);
+ bdrv_unref(e->file);
}
}
g_free(s->extents);
@@ -746,7 +746,7 @@ static int vmdk_parse_extents(const char *desc, BlockDriverState *bs,
/* SPARSE extent and VMFSSPARSE extent are both "COWD" sparse file*/
ret = vmdk_open_sparse(bs, extent_file, bs->open_flags);
if (ret) {
- bdrv_delete(extent_file);
+ bdrv_unref(extent_file);
return ret;
}
} else {
@@ -1636,15 +1636,15 @@ static int vmdk_create(const char *filename, QEMUOptionParameter *options)
BlockDriverState *bs = bdrv_new("");
ret = bdrv_open(bs, backing_file, NULL, 0, NULL);
if (ret != 0) {
- bdrv_delete(bs);
+ bdrv_unref(bs);
return ret;
}
if (strcmp(bs->drv->format_name, "vmdk")) {
- bdrv_delete(bs);
+ bdrv_unref(bs);
return -EINVAL;
}
parent_cid = vmdk_read_cid(bs, 0);
- bdrv_delete(bs);
+ bdrv_unref(bs);
snprintf(parent_desc_line, sizeof(parent_desc_line),
"parentFileNameHint=\"%s\"", backing_file);
}
diff --git a/block/vvfat.c b/block/vvfat.c
index a827d91..2178a13 100644
--- a/block/vvfat.c
+++ b/block/vvfat.c
@@ -2894,7 +2894,7 @@ static int write_target_commit(BlockDriverState *bs, int64_t sector_num,
static void write_target_close(BlockDriverState *bs) {
BDRVVVFATState* s = *((BDRVVVFATState**) bs->opaque);
- bdrv_delete(s->qcow);
+ bdrv_unref(s->qcow);
g_free(s->qcow_filename);
}
@@ -2935,7 +2935,7 @@ static int enable_write_target(BDRVVVFATState *s)
ret = bdrv_open(s->qcow, s->qcow_filename, NULL,
BDRV_O_RDWR | BDRV_O_CACHE_WB | BDRV_O_NO_FLUSH, bdrv_qcow);
if (ret < 0) {
- bdrv_delete(s->qcow);
+ bdrv_unref(s->qcow);
goto err;
}
diff --git a/blockdev.c b/blockdev.c
index fe2f318..9616cc4 100644
--- a/blockdev.c
+++ b/blockdev.c
@@ -212,7 +212,7 @@ static void bdrv_format_print(void *opaque, const char *name)
static void drive_uninit(DriveInfo *dinfo)
{
qemu_opts_del(dinfo->opts);
- bdrv_delete(dinfo->bdrv);
+ bdrv_unref(dinfo->bdrv);
g_free(dinfo->id);
QTAILQ_REMOVE(&drives, dinfo, next);
g_free(dinfo->serial);
@@ -735,7 +735,7 @@ static DriveInfo *blockdev_init(QemuOpts *all_opts,
err:
qemu_opts_del(opts);
QDECREF(bs_opts);
- bdrv_delete(dinfo->bdrv);
+ bdrv_unref(dinfo->bdrv);
g_free(dinfo->id);
QTAILQ_REMOVE(&drives, dinfo, next);
g_free(dinfo);
@@ -996,7 +996,7 @@ static void external_snapshot_abort(BlkTransactionState *common)
ExternalSnapshotState *state =
DO_UPCAST(ExternalSnapshotState, common, common);
if (state->new_bs) {
- bdrv_delete(state->new_bs);
+ bdrv_unref(state->new_bs);
}
}
@@ -1638,7 +1638,7 @@ void qmp_drive_backup(const char *device, const char *target,
target_bs = bdrv_new("");
ret = bdrv_open(target_bs, target, NULL, flags, drv);
if (ret < 0) {
- bdrv_delete(target_bs);
+ bdrv_unref(target_bs);
error_setg_file_open(errp, -ret, target);
return;
}
@@ -1646,7 +1646,7 @@ void qmp_drive_backup(const char *device, const char *target,
backup_start(bs, target_bs, speed, sync, on_source_error, on_target_error,
block_job_cb, bs, &local_err);
if (local_err != NULL) {
- bdrv_delete(target_bs);
+ bdrv_unref(target_bs);
error_propagate(errp, local_err);
return;
}
@@ -1778,7 +1778,7 @@ void qmp_drive_mirror(const char *device, const char *target,
target_bs = bdrv_new("");
ret = bdrv_open(target_bs, target, NULL, flags | BDRV_O_NO_BACKING, drv);
if (ret < 0) {
- bdrv_delete(target_bs);
+ bdrv_unref(target_bs);
error_setg_file_open(errp, -ret, target);
return;
}
@@ -1787,7 +1787,7 @@ void qmp_drive_mirror(const char *device, const char *target,
on_source_error, on_target_error,
block_job_cb, bs, &local_err);
if (local_err != NULL) {
- bdrv_delete(target_bs);
+ bdrv_unref(target_bs);
error_propagate(errp, local_err);
return;
}
diff --git a/hw/block/xen_disk.c b/hw/block/xen_disk.c
index 727f433..8bfa04e 100644
--- a/hw/block/xen_disk.c
+++ b/hw/block/xen_disk.c
@@ -813,7 +813,7 @@ static int blk_connect(struct XenDevice *xendev)
readonly);
if (bdrv_open(blkdev->bs,
blkdev->filename, NULL, qflags, drv) != 0) {
- bdrv_delete(blkdev->bs);
+ bdrv_unref(blkdev->bs);
blkdev->bs = NULL;
}
}
@@ -926,7 +926,7 @@ static void blk_disconnect(struct XenDevice *xendev)
/* close/delete only if we created it ourself */
bdrv_close(blkdev->bs);
bdrv_detach_dev(blkdev->bs, blkdev);
- bdrv_delete(blkdev->bs);
+ bdrv_unref(blkdev->bs);
}
blkdev->bs = NULL;
}
diff --git a/include/block/block.h b/include/block/block.h
index f24e1ff..107f5a0 100644
--- a/include/block/block.h
+++ b/include/block/block.h
@@ -122,7 +122,6 @@ BlockDriverState *bdrv_new(const char *device_name);
void bdrv_make_anon(BlockDriverState *bs);
void bdrv_swap(BlockDriverState *bs_new, BlockDriverState *bs_old);
void bdrv_append(BlockDriverState *bs_new, BlockDriverState *bs_top);
-void bdrv_delete(BlockDriverState *bs);
int bdrv_parse_cache_flags(const char *mode, int *flags);
int bdrv_parse_discard_flags(const char *mode, int *flags);
int bdrv_file_open(BlockDriverState **pbs, const char *filename,
diff --git a/qemu-img.c b/qemu-img.c
index e790d6a..744c0d9 100644
--- a/qemu-img.c
+++ b/qemu-img.c
@@ -300,7 +300,7 @@ static BlockDriverState *bdrv_new_open(const char *filename,
return bs;
fail:
if (bs) {
- bdrv_delete(bs);
+ bdrv_unref(bs);
}
return NULL;
}
@@ -654,7 +654,7 @@ static int img_check(int argc, char **argv)
fail:
qapi_free_ImageCheck(check);
- bdrv_delete(bs);
+ bdrv_unref(bs);
return ret;
}
@@ -724,7 +724,7 @@ static int img_commit(int argc, char **argv)
break;
}
- bdrv_delete(bs);
+ bdrv_unref(bs);
if (ret) {
return 1;
}
@@ -1106,11 +1106,11 @@ static int img_compare(int argc, char **argv)
ret = 0;
out:
- bdrv_delete(bs2);
+ bdrv_unref(bs2);
qemu_vfree(buf1);
qemu_vfree(buf2);
out2:
- bdrv_delete(bs1);
+ bdrv_unref(bs1);
out3:
qemu_progress_end();
return ret;
@@ -1561,12 +1561,12 @@ out:
free_option_parameters(param);
qemu_vfree(buf);
if (out_bs) {
- bdrv_delete(out_bs);
+ bdrv_unref(out_bs);
}
if (bs) {
for (bs_i = 0; bs_i < bs_n; bs_i++) {
if (bs[bs_i]) {
- bdrv_delete(bs[bs_i]);
+ bdrv_unref(bs[bs_i]);
}
}
g_free(bs);
@@ -1704,7 +1704,7 @@ static ImageInfoList *collect_image_info_list(const char *filename,
*last = elem;
last = &elem->next;
- bdrv_delete(bs);
+ bdrv_unref(bs);
filename = fmt = NULL;
if (chain) {
@@ -1918,7 +1918,7 @@ static int img_snapshot(int argc, char **argv)
}
/* Cleanup */
- bdrv_delete(bs);
+ bdrv_unref(bs);
if (ret) {
return 1;
}
@@ -2193,14 +2193,14 @@ out:
/* Cleanup */
if (!unsafe) {
if (bs_old_backing != NULL) {
- bdrv_delete(bs_old_backing);
+ bdrv_unref(bs_old_backing);
}
if (bs_new_backing != NULL) {
- bdrv_delete(bs_new_backing);
+ bdrv_unref(bs_new_backing);
}
}
- bdrv_delete(bs);
+ bdrv_unref(bs);
if (ret) {
return 1;
}
@@ -2323,7 +2323,7 @@ static int img_resize(int argc, char **argv)
}
out:
if (bs) {
- bdrv_delete(bs);
+ bdrv_unref(bs);
}
if (ret) {
return 1;
diff --git a/qemu-io.c b/qemu-io.c
index d54dc86..71f4ff1 100644
--- a/qemu-io.c
+++ b/qemu-io.c
@@ -32,7 +32,7 @@ static char **cmdline;
static int close_f(BlockDriverState *bs, int argc, char **argv)
{
- bdrv_delete(bs);
+ bdrv_unref(bs);
qemuio_bs = NULL;
return 0;
}
@@ -61,7 +61,7 @@ static int openfile(char *name, int flags, int growable)
if (bdrv_open(qemuio_bs, name, NULL, flags, NULL) < 0) {
fprintf(stderr, "%s: can't open device %s\n", progname, name);
- bdrv_delete(qemuio_bs);
+ bdrv_unref(qemuio_bs);
qemuio_bs = NULL;
return 1;
}
@@ -422,7 +422,7 @@ int main(int argc, char **argv)
bdrv_drain_all();
if (qemuio_bs) {
- bdrv_delete(qemuio_bs);
+ bdrv_unref(qemuio_bs);
}
return 0;
}
--
1.8.3.1
^ permalink raw reply related [flat|nested] 56+ messages in thread
* [Qemu-devel] [PULL 14/42] migration: omit drive ref as we have bdrv_ref now
2013-09-06 15:38 [Qemu-devel] [PULL 00/42] Block patches Stefan Hajnoczi
` (12 preceding siblings ...)
2013-09-06 15:38 ` [Qemu-devel] [PULL 13/42] block: make bdrv_delete() static Stefan Hajnoczi
@ 2013-09-06 15:38 ` Stefan Hajnoczi
2013-09-06 15:38 ` [Qemu-devel] [PULL 15/42] xen_disk: simplify blk_disconnect with refcnt Stefan Hajnoczi
` (27 subsequent siblings)
41 siblings, 0 replies; 56+ messages in thread
From: Stefan Hajnoczi @ 2013-09-06 15:38 UTC (permalink / raw)
To: qemu-devel; +Cc: Fam Zheng, Stefan Hajnoczi, Anthony Liguori
From: Fam Zheng <famz@redhat.com>
block-migration.c does not actually use DriveInfo anywhere. Hence it's
safe to drive ref code, we really only care about referencing BDS.
Signed-off-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
block-migration.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/block-migration.c b/block-migration.c
index f803f20..daf9ec1 100644
--- a/block-migration.c
+++ b/block-migration.c
@@ -336,8 +336,8 @@ static void init_blk_migration_it(void *opaque, BlockDriverState *bs)
bmds->completed_sectors = 0;
bmds->shared_base = block_mig_state.shared_base;
alloc_aio_bitmap(bmds);
- drive_get_ref(drive_get_by_blockdev(bs));
bdrv_set_in_use(bs, 1);
+ bdrv_ref(bs);
block_mig_state.total_sector_sum += sectors;
@@ -575,7 +575,7 @@ static void blk_mig_cleanup(void)
while ((bmds = QSIMPLEQ_FIRST(&block_mig_state.bmds_list)) != NULL) {
QSIMPLEQ_REMOVE_HEAD(&block_mig_state.bmds_list, entry);
bdrv_set_in_use(bmds->bs, 0);
- drive_put_ref(drive_get_by_blockdev(bmds->bs));
+ bdrv_unref(bmds->bs);
g_free(bmds->aio_bitmap);
g_free(bmds);
}
--
1.8.3.1
^ permalink raw reply related [flat|nested] 56+ messages in thread
* [Qemu-devel] [PULL 15/42] xen_disk: simplify blk_disconnect with refcnt
2013-09-06 15:38 [Qemu-devel] [PULL 00/42] Block patches Stefan Hajnoczi
` (13 preceding siblings ...)
2013-09-06 15:38 ` [Qemu-devel] [PULL 14/42] migration: omit drive ref as we have bdrv_ref now Stefan Hajnoczi
@ 2013-09-06 15:38 ` Stefan Hajnoczi
2013-09-06 15:38 ` [Qemu-devel] [PULL 16/42] nbd: use BlockDriverState refcnt Stefan Hajnoczi
` (26 subsequent siblings)
41 siblings, 0 replies; 56+ messages in thread
From: Stefan Hajnoczi @ 2013-09-06 15:38 UTC (permalink / raw)
To: qemu-devel; +Cc: Fam Zheng, Stefan Hajnoczi, Anthony Liguori
From: Fam Zheng <famz@redhat.com>
We call bdrv_attach_dev when initializing whether or not bs is created
locally, so call bdrv_detach_dev and let the refcnt handle the
lifecycle.
Signed-off-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
hw/block/xen_disk.c | 11 +++++------
1 file changed, 5 insertions(+), 6 deletions(-)
diff --git a/hw/block/xen_disk.c b/hw/block/xen_disk.c
index 8bfa04e..668cc06 100644
--- a/hw/block/xen_disk.c
+++ b/hw/block/xen_disk.c
@@ -824,6 +824,9 @@ static int blk_connect(struct XenDevice *xendev)
/* setup via qemu cmdline -> already setup for us */
xen_be_printf(&blkdev->xendev, 2, "get configured bdrv (cmdline setup)\n");
blkdev->bs = blkdev->dinfo->bdrv;
+ /* blkdev->bs is not create by us, we get a reference
+ * so we can bdrv_unref() unconditionally */
+ bdrv_ref(blkdev->bs);
}
bdrv_attach_dev_nofail(blkdev->bs, blkdev);
blkdev->file_size = bdrv_getlength(blkdev->bs);
@@ -922,12 +925,8 @@ static void blk_disconnect(struct XenDevice *xendev)
struct XenBlkDev *blkdev = container_of(xendev, struct XenBlkDev, xendev);
if (blkdev->bs) {
- if (!blkdev->dinfo) {
- /* close/delete only if we created it ourself */
- bdrv_close(blkdev->bs);
- bdrv_detach_dev(blkdev->bs, blkdev);
- bdrv_unref(blkdev->bs);
- }
+ bdrv_detach_dev(blkdev->bs, blkdev);
+ bdrv_unref(blkdev->bs);
blkdev->bs = NULL;
}
xen_be_unbind_evtchn(&blkdev->xendev);
--
1.8.3.1
^ permalink raw reply related [flat|nested] 56+ messages in thread
* [Qemu-devel] [PULL 16/42] nbd: use BlockDriverState refcnt
2013-09-06 15:38 [Qemu-devel] [PULL 00/42] Block patches Stefan Hajnoczi
` (14 preceding siblings ...)
2013-09-06 15:38 ` [Qemu-devel] [PULL 15/42] xen_disk: simplify blk_disconnect with refcnt Stefan Hajnoczi
@ 2013-09-06 15:38 ` Stefan Hajnoczi
2013-09-06 15:38 ` [Qemu-devel] [PULL 17/42] block: use BDS ref for block jobs Stefan Hajnoczi
` (25 subsequent siblings)
41 siblings, 0 replies; 56+ messages in thread
From: Stefan Hajnoczi @ 2013-09-06 15:38 UTC (permalink / raw)
To: qemu-devel; +Cc: Fam Zheng, Stefan Hajnoczi, Anthony Liguori
From: Fam Zheng <famz@redhat.com>
Previously, nbd calls drive_get_ref() on the drive of bs. A BDS doesn't
always have associated dinfo, which nbd doesn't care either. We already
have BDS ref count, so use it to make it safe for a BDS w/o blockdev.
Signed-off-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
blockdev-nbd.c | 10 +---------
nbd.c | 5 +++++
2 files changed, 6 insertions(+), 9 deletions(-)
diff --git a/blockdev-nbd.c b/blockdev-nbd.c
index 95f10c8..922cf56 100644
--- a/blockdev-nbd.c
+++ b/blockdev-nbd.c
@@ -69,12 +69,6 @@ static void nbd_close_notifier(Notifier *n, void *data)
g_free(cn);
}
-static void nbd_server_put_ref(NBDExport *exp)
-{
- BlockDriverState *bs = nbd_export_get_blockdev(exp);
- drive_put_ref(drive_get_by_blockdev(bs));
-}
-
void qmp_nbd_server_add(const char *device, bool has_writable, bool writable,
Error **errp)
{
@@ -105,11 +99,9 @@ void qmp_nbd_server_add(const char *device, bool has_writable, bool writable,
writable = false;
}
- exp = nbd_export_new(bs, 0, -1, writable ? 0 : NBD_FLAG_READ_ONLY,
- nbd_server_put_ref);
+ exp = nbd_export_new(bs, 0, -1, writable ? 0 : NBD_FLAG_READ_ONLY, NULL);
nbd_export_set_name(exp, device);
- drive_get_ref(drive_get_by_blockdev(bs));
n = g_malloc0(sizeof(NBDCloseNotifier));
n->n.notify = nbd_close_notifier;
diff --git a/nbd.c b/nbd.c
index 0fd0583..f847940 100644
--- a/nbd.c
+++ b/nbd.c
@@ -882,6 +882,7 @@ NBDExport *nbd_export_new(BlockDriverState *bs, off_t dev_offset,
exp->nbdflags = nbdflags;
exp->size = size == -1 ? bdrv_getlength(bs) : size;
exp->close = close;
+ bdrv_ref(bs);
return exp;
}
@@ -928,6 +929,10 @@ void nbd_export_close(NBDExport *exp)
}
nbd_export_set_name(exp, NULL);
nbd_export_put(exp);
+ if (exp->bs) {
+ bdrv_unref(exp->bs);
+ exp->bs = NULL;
+ }
}
void nbd_export_get(NBDExport *exp)
--
1.8.3.1
^ permalink raw reply related [flat|nested] 56+ messages in thread
* [Qemu-devel] [PULL 17/42] block: use BDS ref for block jobs
2013-09-06 15:38 [Qemu-devel] [PULL 00/42] Block patches Stefan Hajnoczi
` (15 preceding siblings ...)
2013-09-06 15:38 ` [Qemu-devel] [PULL 16/42] nbd: use BlockDriverState refcnt Stefan Hajnoczi
@ 2013-09-06 15:38 ` Stefan Hajnoczi
2013-09-06 15:38 ` [Qemu-devel] [PULL 18/42] qmp: Documentation for BLOCK_IMAGE_CORRUPTED Stefan Hajnoczi
` (24 subsequent siblings)
41 siblings, 0 replies; 56+ messages in thread
From: Stefan Hajnoczi @ 2013-09-06 15:38 UTC (permalink / raw)
To: qemu-devel; +Cc: Fam Zheng, Stefan Hajnoczi, Anthony Liguori
From: Fam Zheng <famz@redhat.com>
Block jobs used drive_get_ref(drive_get_by_blockdev(bs)) to avoid BDS
being deleted. Now we have BDS reference count, and block jobs don't
care about dinfo, so replace them to get cleaner code. It is also the
safe way when BDS has no drive info.
Signed-off-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
blockdev.c | 49 +++++++++++++++----------------------------------
blockjob.c | 1 +
2 files changed, 16 insertions(+), 34 deletions(-)
diff --git a/blockdev.c b/blockdev.c
index 9616cc4..07dac05 100644
--- a/blockdev.c
+++ b/blockdev.c
@@ -234,32 +234,32 @@ void drive_get_ref(DriveInfo *dinfo)
typedef struct {
QEMUBH *bh;
- DriveInfo *dinfo;
-} DrivePutRefBH;
+ BlockDriverState *bs;
+} BDRVPutRefBH;
-static void drive_put_ref_bh(void *opaque)
+static void bdrv_put_ref_bh(void *opaque)
{
- DrivePutRefBH *s = opaque;
+ BDRVPutRefBH *s = opaque;
- drive_put_ref(s->dinfo);
+ bdrv_unref(s->bs);
qemu_bh_delete(s->bh);
g_free(s);
}
/*
- * Release a drive reference in a BH
+ * Release a BDS reference in a BH
*
- * It is not possible to use drive_put_ref() from a callback function when the
- * callers still need the drive. In such cases we schedule a BH to release the
- * reference.
+ * It is not safe to use bdrv_unref() from a callback function when the callers
+ * still need the BlockDriverState. In such cases we schedule a BH to release
+ * the reference.
*/
-static void drive_put_ref_bh_schedule(DriveInfo *dinfo)
+static void bdrv_put_ref_bh_schedule(BlockDriverState *bs)
{
- DrivePutRefBH *s;
+ BDRVPutRefBH *s;
- s = g_new(DrivePutRefBH, 1);
- s->bh = qemu_bh_new(drive_put_ref_bh, s);
- s->dinfo = dinfo;
+ s = g_new(BDRVPutRefBH, 1);
+ s->bh = qemu_bh_new(bdrv_put_ref_bh, s);
+ s->bs = bs;
qemu_bh_schedule(s->bh);
}
@@ -1436,7 +1436,7 @@ static void block_job_cb(void *opaque, int ret)
}
qobject_decref(obj);
- drive_put_ref_bh_schedule(drive_get_by_blockdev(bs));
+ bdrv_put_ref_bh_schedule(bs);
}
void qmp_block_stream(const char *device, bool has_base,
@@ -1473,11 +1473,6 @@ void qmp_block_stream(const char *device, bool has_base,
return;
}
- /* Grab a reference so hotplug does not delete the BlockDriverState from
- * underneath us.
- */
- drive_get_ref(drive_get_by_blockdev(bs));
-
trace_qmp_block_stream(bs, bs->job);
}
@@ -1534,10 +1529,6 @@ void qmp_block_commit(const char *device,
error_propagate(errp, local_err);
return;
}
- /* Grab a reference so hotplug does not delete the BlockDriverState from
- * underneath us.
- */
- drive_get_ref(drive_get_by_blockdev(bs));
}
void qmp_drive_backup(const char *device, const char *target,
@@ -1650,11 +1641,6 @@ void qmp_drive_backup(const char *device, const char *target,
error_propagate(errp, local_err);
return;
}
-
- /* Grab a reference so hotplug does not delete the BlockDriverState from
- * underneath us.
- */
- drive_get_ref(drive_get_by_blockdev(bs));
}
#define DEFAULT_MIRROR_BUF_SIZE (10 << 20)
@@ -1791,11 +1777,6 @@ void qmp_drive_mirror(const char *device, const char *target,
error_propagate(errp, local_err);
return;
}
-
- /* Grab a reference so hotplug does not delete the BlockDriverState from
- * underneath us.
- */
- drive_get_ref(drive_get_by_blockdev(bs));
}
static BlockJob *find_block_job(const char *device)
diff --git a/blockjob.c b/blockjob.c
index 7edc945..e7d49b7 100644
--- a/blockjob.c
+++ b/blockjob.c
@@ -45,6 +45,7 @@ void *block_job_create(const BlockJobType *job_type, BlockDriverState *bs,
error_set(errp, QERR_DEVICE_IN_USE, bdrv_get_device_name(bs));
return NULL;
}
+ bdrv_ref(bs);
bdrv_set_in_use(bs, 1);
job = g_malloc0(job_type->instance_size);
--
1.8.3.1
^ permalink raw reply related [flat|nested] 56+ messages in thread
* [Qemu-devel] [PULL 18/42] qmp: Documentation for BLOCK_IMAGE_CORRUPTED
2013-09-06 15:38 [Qemu-devel] [PULL 00/42] Block patches Stefan Hajnoczi
` (16 preceding siblings ...)
2013-09-06 15:38 ` [Qemu-devel] [PULL 17/42] block: use BDS ref for block jobs Stefan Hajnoczi
@ 2013-09-06 15:38 ` Stefan Hajnoczi
2013-09-06 15:38 ` [Qemu-devel] [PULL 19/42] cow: make reads go at a decent speed Stefan Hajnoczi
` (23 subsequent siblings)
41 siblings, 0 replies; 56+ messages in thread
From: Stefan Hajnoczi @ 2013-09-06 15:38 UTC (permalink / raw)
To: qemu-devel; +Cc: Stefan Hajnoczi, Anthony Liguori, Max Reitz
From: Max Reitz <mreitz@redhat.com>
Add an appropriate entry describing this event and its parameters into
qmp-events.txt.
Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
QMP/qmp-events.txt | 22 ++++++++++++++++++++++
1 file changed, 22 insertions(+)
diff --git a/QMP/qmp-events.txt b/QMP/qmp-events.txt
index 39b6016..4b24ec9 100644
--- a/QMP/qmp-events.txt
+++ b/QMP/qmp-events.txt
@@ -18,6 +18,28 @@ Example:
"data": { "actual": 944766976 },
"timestamp": { "seconds": 1267020223, "microseconds": 435656 } }
+BLOCK_IMAGE_CORRUPTED
+---------------------
+
+Emitted when a disk image is being marked corrupt.
+
+Data:
+
+- "device": Device name (json-string)
+- "msg": Informative message (e.g., reason for the corruption) (json-string)
+- "offset": If the corruption resulted from an image access, this is the access
+ offset into the image (json-int)
+- "size": If the corruption resulted from an image access, this is the access
+ size (json-int)
+
+Example:
+
+{ "event": "BLOCK_IMAGE_CORRUPTED",
+ "data": { "device": "ide0-hd0",
+ "msg": "Prevented active L1 table overwrite", "offset": 196608,
+ "size": 65536 },
+ "timestamp": { "seconds": 1378126126, "microseconds": 966463 } }
+
BLOCK_IO_ERROR
--------------
--
1.8.3.1
^ permalink raw reply related [flat|nested] 56+ messages in thread
* [Qemu-devel] [PULL 19/42] cow: make reads go at a decent speed
2013-09-06 15:38 [Qemu-devel] [PULL 00/42] Block patches Stefan Hajnoczi
` (17 preceding siblings ...)
2013-09-06 15:38 ` [Qemu-devel] [PULL 18/42] qmp: Documentation for BLOCK_IMAGE_CORRUPTED Stefan Hajnoczi
@ 2013-09-06 15:38 ` Stefan Hajnoczi
2013-09-06 15:38 ` [Qemu-devel] [PULL 20/42] cow: make writes go at a less indecent speed Stefan Hajnoczi
` (22 subsequent siblings)
41 siblings, 0 replies; 56+ messages in thread
From: Stefan Hajnoczi @ 2013-09-06 15:38 UTC (permalink / raw)
To: qemu-devel; +Cc: Paolo Bonzini, Stefan Hajnoczi, Anthony Liguori
From: Paolo Bonzini <pbonzini@redhat.com>
Do not do two reads for each sector; load each sector of the bitmap
and use bitmap operations to process it.
Writes are still dog slow!
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
block/cow.c | 54 ++++++++++++++++++++++++++++++++----------------------
1 file changed, 32 insertions(+), 22 deletions(-)
diff --git a/block/cow.c b/block/cow.c
index 767639c..4512806 100644
--- a/block/cow.c
+++ b/block/cow.c
@@ -126,18 +126,31 @@ static inline int cow_set_bit(BlockDriverState *bs, int64_t bitnum)
return 0;
}
-static inline int is_bit_set(BlockDriverState *bs, int64_t bitnum)
+#define BITS_PER_BITMAP_SECTOR (512 * 8)
+
+/* Cannot use bitmap.c on big-endian machines. */
+static int cow_test_bit(int64_t bitnum, const uint8_t *bitmap)
{
- uint64_t offset = sizeof(struct cow_header_v2) + bitnum / 8;
- uint8_t bitmap;
- int ret;
+ return (bitmap[bitnum / 8] & (1 << (bitnum & 7))) != 0;
+}
- ret = bdrv_pread(bs->file, offset, &bitmap, sizeof(bitmap));
- if (ret < 0) {
- return ret;
+static int cow_find_streak(const uint8_t *bitmap, int value, int start, int nb_sectors)
+{
+ int streak_value = value ? 0xFF : 0;
+ int last = MIN(start + nb_sectors, BITS_PER_BITMAP_SECTOR);
+ int bitnum = start;
+ while (bitnum < last) {
+ if ((bitnum & 7) == 0 && bitmap[bitnum / 8] == streak_value) {
+ bitnum += 8;
+ continue;
+ }
+ if (cow_test_bit(bitnum, bitmap) == value) {
+ bitnum++;
+ continue;
+ }
+ break;
}
-
- return !!(bitmap & (1 << (bitnum % 8)));
+ return MIN(bitnum, last) - start;
}
/* Return true if first block has been changed (ie. current version is
@@ -146,23 +159,20 @@ static inline int is_bit_set(BlockDriverState *bs, int64_t bitnum)
static int coroutine_fn cow_co_is_allocated(BlockDriverState *bs,
int64_t sector_num, int nb_sectors, int *num_same)
{
+ int64_t bitnum = sector_num + sizeof(struct cow_header_v2) * 8;
+ uint64_t offset = (bitnum / 8) & -BDRV_SECTOR_SIZE;
+ uint8_t bitmap[BDRV_SECTOR_SIZE];
+ int ret;
int changed;
- if (nb_sectors == 0) {
- *num_same = nb_sectors;
- return 0;
- }
-
- changed = is_bit_set(bs, sector_num);
- if (changed < 0) {
- return 0; /* XXX: how to return I/O errors? */
- }
-
- for (*num_same = 1; *num_same < nb_sectors; (*num_same)++) {
- if (is_bit_set(bs, sector_num + *num_same) != changed)
- break;
+ ret = bdrv_pread(bs->file, offset, &bitmap, sizeof(bitmap));
+ if (ret < 0) {
+ return ret;
}
+ bitnum &= BITS_PER_BITMAP_SECTOR - 1;
+ changed = cow_test_bit(bitnum, bitmap);
+ *num_same = cow_find_streak(bitmap, changed, bitnum, nb_sectors);
return changed;
}
--
1.8.3.1
^ permalink raw reply related [flat|nested] 56+ messages in thread
* [Qemu-devel] [PULL 20/42] cow: make writes go at a less indecent speed
2013-09-06 15:38 [Qemu-devel] [PULL 00/42] Block patches Stefan Hajnoczi
` (18 preceding siblings ...)
2013-09-06 15:38 ` [Qemu-devel] [PULL 19/42] cow: make reads go at a decent speed Stefan Hajnoczi
@ 2013-09-06 15:38 ` Stefan Hajnoczi
2013-09-06 15:38 ` [Qemu-devel] [PULL 21/42] cow: do not call bdrv_co_is_allocated Stefan Hajnoczi
` (21 subsequent siblings)
41 siblings, 0 replies; 56+ messages in thread
From: Stefan Hajnoczi @ 2013-09-06 15:38 UTC (permalink / raw)
To: qemu-devel; +Cc: Paolo Bonzini, Stefan Hajnoczi, Anthony Liguori
From: Paolo Bonzini <pbonzini@redhat.com>
Only sync once per write, rather than once per sector.
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
block/cow.c | 19 ++++++++++++++++---
1 file changed, 16 insertions(+), 3 deletions(-)
diff --git a/block/cow.c b/block/cow.c
index 4512806..cd889e6 100644
--- a/block/cow.c
+++ b/block/cow.c
@@ -106,7 +106,7 @@ static int cow_open(BlockDriverState *bs, QDict *options, int flags)
* XXX(hch): right now these functions are extremely inefficient.
* We should just read the whole bitmap we'll need in one go instead.
*/
-static inline int cow_set_bit(BlockDriverState *bs, int64_t bitnum)
+static inline int cow_set_bit(BlockDriverState *bs, int64_t bitnum, bool *first)
{
uint64_t offset = sizeof(struct cow_header_v2) + bitnum / 8;
uint8_t bitmap;
@@ -117,9 +117,21 @@ static inline int cow_set_bit(BlockDriverState *bs, int64_t bitnum)
return ret;
}
+ if (bitmap & (1 << (bitnum % 8))) {
+ return 0;
+ }
+
+ if (*first) {
+ ret = bdrv_flush(bs->file);
+ if (ret < 0) {
+ return ret;
+ }
+ *first = false;
+ }
+
bitmap |= (1 << (bitnum % 8));
- ret = bdrv_pwrite_sync(bs->file, offset, &bitmap, sizeof(bitmap));
+ ret = bdrv_pwrite(bs->file, offset, &bitmap, sizeof(bitmap));
if (ret < 0) {
return ret;
}
@@ -181,9 +193,10 @@ static int cow_update_bitmap(BlockDriverState *bs, int64_t sector_num,
{
int error = 0;
int i;
+ bool first = true;
for (i = 0; i < nb_sectors; i++) {
- error = cow_set_bit(bs, sector_num + i);
+ error = cow_set_bit(bs, sector_num + i, &first);
if (error) {
break;
}
--
1.8.3.1
^ permalink raw reply related [flat|nested] 56+ messages in thread
* [Qemu-devel] [PULL 21/42] cow: do not call bdrv_co_is_allocated
2013-09-06 15:38 [Qemu-devel] [PULL 00/42] Block patches Stefan Hajnoczi
` (19 preceding siblings ...)
2013-09-06 15:38 ` [Qemu-devel] [PULL 20/42] cow: make writes go at a less indecent speed Stefan Hajnoczi
@ 2013-09-06 15:38 ` Stefan Hajnoczi
2013-09-06 15:38 ` [Qemu-devel] [PULL 22/42] block: keep bs->total_sectors up to date even for growable block devices Stefan Hajnoczi
` (20 subsequent siblings)
41 siblings, 0 replies; 56+ messages in thread
From: Stefan Hajnoczi @ 2013-09-06 15:38 UTC (permalink / raw)
To: qemu-devel; +Cc: Paolo Bonzini, Stefan Hajnoczi, Anthony Liguori
From: Paolo Bonzini <pbonzini@redhat.com>
As we change bdrv_is_allocated to gather more information from bs and
bs->file, it will become a bit slower. It is still appropriate for online
jobs, but not for reads/writes. Call the internal function instead.
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
block/cow.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/block/cow.c b/block/cow.c
index cd889e6..f4eca10 100644
--- a/block/cow.c
+++ b/block/cow.c
@@ -212,7 +212,7 @@ static int coroutine_fn cow_read(BlockDriverState *bs, int64_t sector_num,
int ret, n;
while (nb_sectors > 0) {
- if (bdrv_co_is_allocated(bs, sector_num, nb_sectors, &n)) {
+ if (cow_co_is_allocated(bs, sector_num, nb_sectors, &n)) {
ret = bdrv_pread(bs->file,
s->cow_sectors_offset + sector_num * 512,
buf, n * 512);
--
1.8.3.1
^ permalink raw reply related [flat|nested] 56+ messages in thread
* [Qemu-devel] [PULL 22/42] block: keep bs->total_sectors up to date even for growable block devices
2013-09-06 15:38 [Qemu-devel] [PULL 00/42] Block patches Stefan Hajnoczi
` (20 preceding siblings ...)
2013-09-06 15:38 ` [Qemu-devel] [PULL 21/42] cow: do not call bdrv_co_is_allocated Stefan Hajnoczi
@ 2013-09-06 15:38 ` Stefan Hajnoczi
2013-09-06 15:38 ` [Qemu-devel] [PULL 23/42] block: make bdrv_co_is_allocated static Stefan Hajnoczi
` (19 subsequent siblings)
41 siblings, 0 replies; 56+ messages in thread
From: Stefan Hajnoczi @ 2013-09-06 15:38 UTC (permalink / raw)
To: qemu-devel; +Cc: Paolo Bonzini, Stefan Hajnoczi, Anthony Liguori
From: Paolo Bonzini <pbonzini@redhat.com>
If a BlockDriverState is growable, after every write we need to
check if bs->total_sectors might have changed. With this change,
bdrv_getlength does not need anymore a system call.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
block.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/block.c b/block.c
index 905bf34..d9a3a7f 100644
--- a/block.c
+++ b/block.c
@@ -2739,6 +2739,9 @@ static int coroutine_fn bdrv_co_do_writev(BlockDriverState *bs,
if (bs->wr_highest_sector < sector_num + nb_sectors - 1) {
bs->wr_highest_sector = sector_num + nb_sectors - 1;
}
+ if (bs->growable && ret >= 0) {
+ bs->total_sectors = MAX(bs->total_sectors, sector_num + nb_sectors);
+ }
tracked_request_end(&req);
@@ -2813,7 +2816,7 @@ int64_t bdrv_getlength(BlockDriverState *bs)
if (!drv)
return -ENOMEDIUM;
- if (bs->growable || bdrv_dev_has_removable_media(bs)) {
+ if (bdrv_dev_has_removable_media(bs)) {
if (drv->bdrv_getlength) {
return drv->bdrv_getlength(bs);
}
--
1.8.3.1
^ permalink raw reply related [flat|nested] 56+ messages in thread
* [Qemu-devel] [PULL 23/42] block: make bdrv_co_is_allocated static
2013-09-06 15:38 [Qemu-devel] [PULL 00/42] Block patches Stefan Hajnoczi
` (21 preceding siblings ...)
2013-09-06 15:38 ` [Qemu-devel] [PULL 22/42] block: keep bs->total_sectors up to date even for growable block devices Stefan Hajnoczi
@ 2013-09-06 15:38 ` Stefan Hajnoczi
2013-09-06 15:38 ` [Qemu-devel] [PULL 24/42] block: do not use ->total_sectors in bdrv_co_is_allocated Stefan Hajnoczi
` (18 subsequent siblings)
41 siblings, 0 replies; 56+ messages in thread
From: Stefan Hajnoczi @ 2013-09-06 15:38 UTC (permalink / raw)
To: qemu-devel; +Cc: Paolo Bonzini, Stefan Hajnoczi, Anthony Liguori
From: Paolo Bonzini <pbonzini@redhat.com>
bdrv_is_allocated can detect coroutine context and go through a fast
path, similar to other block layer functions.
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
block.c | 24 +++++++++++++++---------
block/backup.c | 4 ++--
block/raw_bsd.c | 2 +-
block/stream.c | 4 ++--
include/block/block.h | 2 --
5 files changed, 20 insertions(+), 16 deletions(-)
diff --git a/block.c b/block.c
index d9a3a7f..f27bab6 100644
--- a/block.c
+++ b/block.c
@@ -2587,7 +2587,7 @@ static int coroutine_fn bdrv_co_do_readv(BlockDriverState *bs,
if (flags & BDRV_REQ_COPY_ON_READ) {
int pnum;
- ret = bdrv_co_is_allocated(bs, sector_num, nb_sectors, &pnum);
+ ret = bdrv_is_allocated(bs, sector_num, nb_sectors, &pnum);
if (ret < 0) {
goto out;
}
@@ -3061,8 +3061,9 @@ typedef struct BdrvCoIsAllocatedData {
* 'nb_sectors' is the max value 'pnum' should be set to. If nb_sectors goes
* beyond the end of the disk image it will be clamped.
*/
-int coroutine_fn bdrv_co_is_allocated(BlockDriverState *bs, int64_t sector_num,
- int nb_sectors, int *pnum)
+static int coroutine_fn bdrv_co_is_allocated(BlockDriverState *bs,
+ int64_t sector_num,
+ int nb_sectors, int *pnum)
{
int64_t n;
@@ -3112,10 +3113,15 @@ int bdrv_is_allocated(BlockDriverState *bs, int64_t sector_num, int nb_sectors,
.done = false,
};
- co = qemu_coroutine_create(bdrv_is_allocated_co_entry);
- qemu_coroutine_enter(co, &data);
- while (!data.done) {
- qemu_aio_wait();
+ if (qemu_in_coroutine()) {
+ /* Fast-path if already in coroutine context */
+ bdrv_is_allocated_co_entry(&data);
+ } else {
+ co = qemu_coroutine_create(bdrv_is_allocated_co_entry);
+ qemu_coroutine_enter(co, &data);
+ while (!data.done) {
+ qemu_aio_wait();
+ }
}
return data.ret;
}
@@ -3143,8 +3149,8 @@ int coroutine_fn bdrv_co_is_allocated_above(BlockDriverState *top,
intermediate = top;
while (intermediate && intermediate != base) {
int pnum_inter;
- ret = bdrv_co_is_allocated(intermediate, sector_num, nb_sectors,
- &pnum_inter);
+ ret = bdrv_is_allocated(intermediate, sector_num, nb_sectors,
+ &pnum_inter);
if (ret < 0) {
return ret;
} else if (ret) {
diff --git a/block/backup.c b/block/backup.c
index 47fb23f..04c4b5c 100644
--- a/block/backup.c
+++ b/block/backup.c
@@ -289,14 +289,14 @@ static void coroutine_fn backup_run(void *opaque)
* backing file. */
for (i = 0; i < BACKUP_SECTORS_PER_CLUSTER;) {
- /* bdrv_co_is_allocated() only returns true/false based
+ /* bdrv_is_allocated() only returns true/false based
* on the first set of sectors it comes across that
* are are all in the same state.
* For that reason we must verify each sector in the
* backup cluster length. We end up copying more than
* needed but at some point that is always the case. */
alloced =
- bdrv_co_is_allocated(bs,
+ bdrv_is_allocated(bs,
start * BACKUP_SECTORS_PER_CLUSTER + i,
BACKUP_SECTORS_PER_CLUSTER - i, &n);
i += n;
diff --git a/block/raw_bsd.c b/block/raw_bsd.c
index ab2b0fd..926712e 100644
--- a/block/raw_bsd.c
+++ b/block/raw_bsd.c
@@ -62,7 +62,7 @@ static int coroutine_fn raw_co_is_allocated(BlockDriverState *bs,
int64_t sector_num, int nb_sectors,
int *pnum)
{
- return bdrv_co_is_allocated(bs->file, sector_num, nb_sectors, pnum);
+ return bdrv_is_allocated(bs->file, sector_num, nb_sectors, pnum);
}
static int coroutine_fn raw_co_write_zeroes(BlockDriverState *bs,
diff --git a/block/stream.c b/block/stream.c
index 7aa2500..fe242ba 100644
--- a/block/stream.c
+++ b/block/stream.c
@@ -119,8 +119,8 @@ wait:
break;
}
- ret = bdrv_co_is_allocated(bs, sector_num,
- STREAM_BUFFER_SIZE / BDRV_SECTOR_SIZE, &n);
+ ret = bdrv_is_allocated(bs, sector_num,
+ STREAM_BUFFER_SIZE / BDRV_SECTOR_SIZE, &n);
if (ret == 1) {
/* Allocated in the top, no need to copy. */
copy = false;
diff --git a/include/block/block.h b/include/block/block.h
index 107f5a0..de75d2d 100644
--- a/include/block/block.h
+++ b/include/block/block.h
@@ -179,8 +179,6 @@ int coroutine_fn bdrv_co_writev(BlockDriverState *bs, int64_t sector_num,
*/
int coroutine_fn bdrv_co_write_zeroes(BlockDriverState *bs, int64_t sector_num,
int nb_sectors);
-int coroutine_fn bdrv_co_is_allocated(BlockDriverState *bs, int64_t sector_num,
- int nb_sectors, int *pnum);
int coroutine_fn bdrv_co_is_allocated_above(BlockDriverState *top,
BlockDriverState *base,
int64_t sector_num,
--
1.8.3.1
^ permalink raw reply related [flat|nested] 56+ messages in thread
* [Qemu-devel] [PULL 24/42] block: do not use ->total_sectors in bdrv_co_is_allocated
2013-09-06 15:38 [Qemu-devel] [PULL 00/42] Block patches Stefan Hajnoczi
` (22 preceding siblings ...)
2013-09-06 15:38 ` [Qemu-devel] [PULL 23/42] block: make bdrv_co_is_allocated static Stefan Hajnoczi
@ 2013-09-06 15:38 ` Stefan Hajnoczi
2013-09-06 15:38 ` [Qemu-devel] [PULL 25/42] block: remove bdrv_is_allocated_above/bdrv_co_is_allocated_above distinction Stefan Hajnoczi
` (17 subsequent siblings)
41 siblings, 0 replies; 56+ messages in thread
From: Stefan Hajnoczi @ 2013-09-06 15:38 UTC (permalink / raw)
To: qemu-devel; +Cc: Paolo Bonzini, Stefan Hajnoczi, Anthony Liguori
From: Paolo Bonzini <pbonzini@redhat.com>
This is more robust when the device has removable media.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
block.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/block.c b/block.c
index f27bab6..4a10fb1 100644
--- a/block.c
+++ b/block.c
@@ -3065,9 +3065,15 @@ static int coroutine_fn bdrv_co_is_allocated(BlockDriverState *bs,
int64_t sector_num,
int nb_sectors, int *pnum)
{
+ int64_t length;
int64_t n;
- if (sector_num >= bs->total_sectors) {
+ length = bdrv_getlength(bs);
+ if (length < 0) {
+ return length;
+ }
+
+ if (sector_num >= (length >> BDRV_SECTOR_BITS)) {
*pnum = 0;
return 0;
}
--
1.8.3.1
^ permalink raw reply related [flat|nested] 56+ messages in thread
* [Qemu-devel] [PULL 25/42] block: remove bdrv_is_allocated_above/bdrv_co_is_allocated_above distinction
2013-09-06 15:38 [Qemu-devel] [PULL 00/42] Block patches Stefan Hajnoczi
` (23 preceding siblings ...)
2013-09-06 15:38 ` [Qemu-devel] [PULL 24/42] block: do not use ->total_sectors in bdrv_co_is_allocated Stefan Hajnoczi
@ 2013-09-06 15:38 ` Stefan Hajnoczi
2013-09-06 15:38 ` [Qemu-devel] [PULL 26/42] block: expect errors from bdrv_co_is_allocated Stefan Hajnoczi
` (16 subsequent siblings)
41 siblings, 0 replies; 56+ messages in thread
From: Stefan Hajnoczi @ 2013-09-06 15:38 UTC (permalink / raw)
To: qemu-devel; +Cc: Paolo Bonzini, Stefan Hajnoczi, Anthony Liguori
From: Paolo Bonzini <pbonzini@redhat.com>
Now that bdrv_is_allocated detects coroutine context, the two can
use the same code.
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
block.c | 46 ++++------------------------------------------
block/commit.c | 6 +++---
block/mirror.c | 4 ++--
block/stream.c | 4 ++--
include/block/block.h | 4 ----
5 files changed, 11 insertions(+), 53 deletions(-)
diff --git a/block.c b/block.c
index 4a10fb1..c6404eb 100644
--- a/block.c
+++ b/block.c
@@ -3144,10 +3144,10 @@ int bdrv_is_allocated(BlockDriverState *bs, int64_t sector_num, int nb_sectors,
* allocated/unallocated state.
*
*/
-int coroutine_fn bdrv_co_is_allocated_above(BlockDriverState *top,
- BlockDriverState *base,
- int64_t sector_num,
- int nb_sectors, int *pnum)
+int bdrv_is_allocated_above(BlockDriverState *top,
+ BlockDriverState *base,
+ int64_t sector_num,
+ int nb_sectors, int *pnum)
{
BlockDriverState *intermediate;
int ret, n = nb_sectors;
@@ -3183,44 +3183,6 @@ int coroutine_fn bdrv_co_is_allocated_above(BlockDriverState *top,
return 0;
}
-/* Coroutine wrapper for bdrv_is_allocated_above() */
-static void coroutine_fn bdrv_is_allocated_above_co_entry(void *opaque)
-{
- BdrvCoIsAllocatedData *data = opaque;
- BlockDriverState *top = data->bs;
- BlockDriverState *base = data->base;
-
- data->ret = bdrv_co_is_allocated_above(top, base, data->sector_num,
- data->nb_sectors, data->pnum);
- data->done = true;
-}
-
-/*
- * Synchronous wrapper around bdrv_co_is_allocated_above().
- *
- * See bdrv_co_is_allocated_above() for details.
- */
-int bdrv_is_allocated_above(BlockDriverState *top, BlockDriverState *base,
- int64_t sector_num, int nb_sectors, int *pnum)
-{
- Coroutine *co;
- BdrvCoIsAllocatedData data = {
- .bs = top,
- .base = base,
- .sector_num = sector_num,
- .nb_sectors = nb_sectors,
- .pnum = pnum,
- .done = false,
- };
-
- co = qemu_coroutine_create(bdrv_is_allocated_above_co_entry);
- qemu_coroutine_enter(co, &data);
- while (!data.done) {
- qemu_aio_wait();
- }
- return data.ret;
-}
-
const char *bdrv_get_encrypted_filename(BlockDriverState *bs)
{
if (bs->backing_hd && bs->backing_hd->encrypted)
diff --git a/block/commit.c b/block/commit.c
index 51a1ab3..ac4b7cc 100644
--- a/block/commit.c
+++ b/block/commit.c
@@ -108,9 +108,9 @@ wait:
break;
}
/* Copy if allocated above the base */
- ret = bdrv_co_is_allocated_above(top, base, sector_num,
- COMMIT_BUFFER_SIZE / BDRV_SECTOR_SIZE,
- &n);
+ ret = bdrv_is_allocated_above(top, base, sector_num,
+ COMMIT_BUFFER_SIZE / BDRV_SECTOR_SIZE,
+ &n);
copy = (ret == 1);
trace_commit_one_iteration(s, sector_num, n, ret);
if (copy) {
diff --git a/block/mirror.c b/block/mirror.c
index 8dbc5f7..f61a779 100644
--- a/block/mirror.c
+++ b/block/mirror.c
@@ -338,8 +338,8 @@ static void coroutine_fn mirror_run(void *opaque)
base = s->mode == MIRROR_SYNC_MODE_FULL ? NULL : bs->backing_hd;
for (sector_num = 0; sector_num < end; ) {
int64_t next = (sector_num | (sectors_per_chunk - 1)) + 1;
- ret = bdrv_co_is_allocated_above(bs, base,
- sector_num, next - sector_num, &n);
+ ret = bdrv_is_allocated_above(bs, base,
+ sector_num, next - sector_num, &n);
if (ret < 0) {
goto immediate_exit;
diff --git a/block/stream.c b/block/stream.c
index fe242ba..e640bc5 100644
--- a/block/stream.c
+++ b/block/stream.c
@@ -127,8 +127,8 @@ wait:
} else {
/* Copy if allocated in the intermediate images. Limit to the
* known-unallocated area [sector_num, sector_num+n). */
- ret = bdrv_co_is_allocated_above(bs->backing_hd, base,
- sector_num, n, &n);
+ ret = bdrv_is_allocated_above(bs->backing_hd, base,
+ sector_num, n, &n);
/* Finish early if end of backing file has been reached */
if (ret == 0 && n == 0) {
diff --git a/include/block/block.h b/include/block/block.h
index de75d2d..5469c94 100644
--- a/include/block/block.h
+++ b/include/block/block.h
@@ -179,10 +179,6 @@ int coroutine_fn bdrv_co_writev(BlockDriverState *bs, int64_t sector_num,
*/
int coroutine_fn bdrv_co_write_zeroes(BlockDriverState *bs, int64_t sector_num,
int nb_sectors);
-int coroutine_fn bdrv_co_is_allocated_above(BlockDriverState *top,
- BlockDriverState *base,
- int64_t sector_num,
- int nb_sectors, int *pnum);
BlockDriverState *bdrv_find_backing_image(BlockDriverState *bs,
const char *backing_file);
int bdrv_get_backing_file_depth(BlockDriverState *bs);
--
1.8.3.1
^ permalink raw reply related [flat|nested] 56+ messages in thread
* [Qemu-devel] [PULL 26/42] block: expect errors from bdrv_co_is_allocated
2013-09-06 15:38 [Qemu-devel] [PULL 00/42] Block patches Stefan Hajnoczi
` (24 preceding siblings ...)
2013-09-06 15:38 ` [Qemu-devel] [PULL 25/42] block: remove bdrv_is_allocated_above/bdrv_co_is_allocated_above distinction Stefan Hajnoczi
@ 2013-09-06 15:38 ` Stefan Hajnoczi
2013-09-06 15:38 ` [Qemu-devel] [PULL 27/42] qemu-img: always probe the input image for allocated sectors Stefan Hajnoczi
` (15 subsequent siblings)
41 siblings, 0 replies; 56+ messages in thread
From: Stefan Hajnoczi @ 2013-09-06 15:38 UTC (permalink / raw)
To: qemu-devel; +Cc: Paolo Bonzini, Stefan Hajnoczi, qemu-stable, Anthony Liguori
From: Paolo Bonzini <pbonzini@redhat.com>
Some bdrv_is_allocated callers do not expect errors, but the fallback
in qcow2.c might make other callers trip on assertion failures or
infinite loops.
Fix the callers to always look for errors.
Cc: qemu-stable@nongnu.org
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
block.c | 7 +++++--
block/cow.c | 6 +++++-
block/qcow2.c | 4 +---
block/stream.c | 2 +-
qemu-img.c | 16 ++++++++++++++--
qemu-io-cmds.c | 4 ++++
6 files changed, 30 insertions(+), 9 deletions(-)
diff --git a/block.c b/block.c
index c6404eb..5df17de 100644
--- a/block.c
+++ b/block.c
@@ -1857,8 +1857,11 @@ int bdrv_commit(BlockDriverState *bs)
buf = g_malloc(COMMIT_BUF_SECTORS * BDRV_SECTOR_SIZE);
for (sector = 0; sector < total_sectors; sector += n) {
- if (bdrv_is_allocated(bs, sector, COMMIT_BUF_SECTORS, &n)) {
-
+ ret = bdrv_is_allocated(bs, sector, COMMIT_BUF_SECTORS, &n);
+ if (ret < 0) {
+ goto ro_cleanup;
+ }
+ if (ret) {
if (bdrv_read(bs, sector, buf, n) != 0) {
ret = -EIO;
goto ro_cleanup;
diff --git a/block/cow.c b/block/cow.c
index f4eca10..7450801 100644
--- a/block/cow.c
+++ b/block/cow.c
@@ -212,7 +212,11 @@ static int coroutine_fn cow_read(BlockDriverState *bs, int64_t sector_num,
int ret, n;
while (nb_sectors > 0) {
- if (cow_co_is_allocated(bs, sector_num, nb_sectors, &n)) {
+ ret = cow_co_is_allocated(bs, sector_num, nb_sectors, &n);
+ if (ret < 0) {
+ return ret;
+ }
+ if (ret) {
ret = bdrv_pread(bs->file,
s->cow_sectors_offset + sector_num * 512,
buf, n * 512);
diff --git a/block/qcow2.c b/block/qcow2.c
index 4d7bd78..cf03a14 100644
--- a/block/qcow2.c
+++ b/block/qcow2.c
@@ -696,13 +696,11 @@ static int coroutine_fn qcow2_co_is_allocated(BlockDriverState *bs,
int ret;
*pnum = nb_sectors;
- /* FIXME We can get errors here, but the bdrv_co_is_allocated interface
- * can't pass them on today */
qemu_co_mutex_lock(&s->lock);
ret = qcow2_get_cluster_offset(bs, sector_num << 9, pnum, &cluster_offset);
qemu_co_mutex_unlock(&s->lock);
if (ret < 0) {
- *pnum = 0;
+ return ret;
}
return (cluster_offset != 0) || (ret == QCOW2_CLUSTER_ZERO);
diff --git a/block/stream.c b/block/stream.c
index e640bc5..078ce4a 100644
--- a/block/stream.c
+++ b/block/stream.c
@@ -124,7 +124,7 @@ wait:
if (ret == 1) {
/* Allocated in the top, no need to copy. */
copy = false;
- } else {
+ } else if (ret >= 0) {
/* Copy if allocated in the intermediate images. Limit to the
* known-unallocated area [sector_num, sector_num+n). */
ret = bdrv_is_allocated_above(bs->backing_hd, base,
diff --git a/qemu-img.c b/qemu-img.c
index 744c0d9..27cc006 100644
--- a/qemu-img.c
+++ b/qemu-img.c
@@ -1508,8 +1508,15 @@ static int img_convert(int argc, char **argv)
are present in both the output's and input's base images (no
need to copy them). */
if (out_baseimg) {
- if (!bdrv_is_allocated(bs[bs_i], sector_num - bs_offset,
- n, &n1)) {
+ ret = bdrv_is_allocated(bs[bs_i], sector_num - bs_offset,
+ n, &n1);
+ if (ret < 0) {
+ error_report("error while reading metadata for sector "
+ "%" PRId64 ": %s",
+ sector_num - bs_offset, strerror(-ret));
+ goto out;
+ }
+ if (!ret) {
sector_num += n1;
continue;
}
@@ -2099,6 +2106,11 @@ static int img_rebase(int argc, char **argv)
/* If the cluster is allocated, we don't need to take action */
ret = bdrv_is_allocated(bs, sector, n, &n);
+ if (ret < 0) {
+ error_report("error while reading image metadata: %s",
+ strerror(-ret));
+ goto out;
+ }
if (ret) {
continue;
}
diff --git a/qemu-io-cmds.c b/qemu-io-cmds.c
index f91b6c4..8565d49 100644
--- a/qemu-io-cmds.c
+++ b/qemu-io-cmds.c
@@ -1830,6 +1830,10 @@ static int alloc_f(BlockDriverState *bs, int argc, char **argv)
sector_num = offset >> 9;
while (remaining) {
ret = bdrv_is_allocated(bs, sector_num, remaining, &num);
+ if (ret < 0) {
+ printf("is_allocated failed: %s\n", strerror(-ret));
+ return 0;
+ }
sector_num += num;
remaining -= num;
if (ret) {
--
1.8.3.1
^ permalink raw reply related [flat|nested] 56+ messages in thread
* [Qemu-devel] [PULL 27/42] qemu-img: always probe the input image for allocated sectors
2013-09-06 15:38 [Qemu-devel] [PULL 00/42] Block patches Stefan Hajnoczi
` (25 preceding siblings ...)
2013-09-06 15:38 ` [Qemu-devel] [PULL 26/42] block: expect errors from bdrv_co_is_allocated Stefan Hajnoczi
@ 2013-09-06 15:38 ` Stefan Hajnoczi
2013-09-06 15:38 ` [Qemu-devel] [PULL 28/42] block: make bdrv_has_zero_init return false for copy-on-write-images Stefan Hajnoczi
` (14 subsequent siblings)
41 siblings, 0 replies; 56+ messages in thread
From: Stefan Hajnoczi @ 2013-09-06 15:38 UTC (permalink / raw)
To: qemu-devel; +Cc: Paolo Bonzini, Stefan Hajnoczi, Anthony Liguori
From: Paolo Bonzini <pbonzini@redhat.com>
qemu-img convert can assume "that sectors which are unallocated in the
input image are present in both the output's and input's base images".
However it is only doing this if the output image returns true for
bdrv_has_zero_init(). Testing bdrv_has_zero_init() does not make much
sense if the output image is copy-on-write, because a copy-on-write
image is never initialized to zero (it is initialized to the content
of the backing file).
There is nothing here that makes has_zero_init images special. The
input and output must be equal for the operation to make sense, and
that's it.
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
qemu-img.c | 40 +++++++++++++++++++---------------------
1 file changed, 19 insertions(+), 21 deletions(-)
diff --git a/qemu-img.c b/qemu-img.c
index 27cc006..5cc579d 100644
--- a/qemu-img.c
+++ b/qemu-img.c
@@ -1502,28 +1502,26 @@ static int img_convert(int argc, char **argv)
n = bs_offset + bs_sectors - sector_num;
}
- if (has_zero_init) {
- /* If the output image is being created as a copy on write image,
- assume that sectors which are unallocated in the input image
- are present in both the output's and input's base images (no
- need to copy them). */
- if (out_baseimg) {
- ret = bdrv_is_allocated(bs[bs_i], sector_num - bs_offset,
- n, &n1);
- if (ret < 0) {
- error_report("error while reading metadata for sector "
- "%" PRId64 ": %s",
- sector_num - bs_offset, strerror(-ret));
- goto out;
- }
- if (!ret) {
- sector_num += n1;
- continue;
- }
- /* The next 'n1' sectors are allocated in the input image. Copy
- only those as they may be followed by unallocated sectors. */
- n = n1;
+ /* If the output image is being created as a copy on write image,
+ assume that sectors which are unallocated in the input image
+ are present in both the output's and input's base images (no
+ need to copy them). */
+ if (out_baseimg) {
+ ret = bdrv_is_allocated(bs[bs_i], sector_num - bs_offset,
+ n, &n1);
+ if (ret < 0) {
+ error_report("error while reading metadata for sector "
+ "%" PRId64 ": %s",
+ sector_num - bs_offset, strerror(-ret));
+ goto out;
+ }
+ if (!ret) {
+ sector_num += n1;
+ continue;
}
+ /* The next 'n1' sectors are allocated in the input image. Copy
+ only those as they may be followed by unallocated sectors. */
+ n = n1;
} else {
n1 = n;
}
--
1.8.3.1
^ permalink raw reply related [flat|nested] 56+ messages in thread
* [Qemu-devel] [PULL 28/42] block: make bdrv_has_zero_init return false for copy-on-write-images
2013-09-06 15:38 [Qemu-devel] [PULL 00/42] Block patches Stefan Hajnoczi
` (26 preceding siblings ...)
2013-09-06 15:38 ` [Qemu-devel] [PULL 27/42] qemu-img: always probe the input image for allocated sectors Stefan Hajnoczi
@ 2013-09-06 15:38 ` Stefan Hajnoczi
2013-09-06 15:39 ` [Qemu-devel] [PULL 29/42] block: introduce bdrv_get_block_status API Stefan Hajnoczi
` (13 subsequent siblings)
41 siblings, 0 replies; 56+ messages in thread
From: Stefan Hajnoczi @ 2013-09-06 15:38 UTC (permalink / raw)
To: qemu-devel; +Cc: Paolo Bonzini, Stefan Hajnoczi, Anthony Liguori
From: Paolo Bonzini <pbonzini@redhat.com>
This helps implementing is_allocated on top of get_block_status.
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
block.c | 5 +++++
qemu-img.c | 9 +--------
2 files changed, 6 insertions(+), 8 deletions(-)
diff --git a/block.c b/block.c
index 5df17de..2a90893 100644
--- a/block.c
+++ b/block.c
@@ -3031,6 +3031,11 @@ int bdrv_has_zero_init(BlockDriverState *bs)
{
assert(bs->drv);
+ /* If BS is a copy on write image, it is initialized to
+ the contents of the base image, which may not be zeroes. */
+ if (bs->backing_hd) {
+ return 0;
+ }
if (bs->drv->bdrv_has_zero_init) {
return bs->drv->bdrv_has_zero_init(bs);
}
diff --git a/qemu-img.c b/qemu-img.c
index 5cc579d..b074fa7 100644
--- a/qemu-img.c
+++ b/qemu-img.c
@@ -1537,14 +1537,7 @@ static int img_convert(int argc, char **argv)
should add a specific call to have the info to go faster */
buf1 = buf;
while (n > 0) {
- /* If the output image is being created as a copy on write image,
- copy all sectors even the ones containing only NUL bytes,
- because they may differ from the sectors in the base image.
-
- If the output is to a host device, we also write out
- sectors that are entirely 0, since whatever data was
- already there is garbage, not 0s. */
- if (!has_zero_init || out_baseimg ||
+ if (!has_zero_init ||
is_allocated_sectors_min(buf1, n, &n1, min_sparse)) {
ret = bdrv_write(out_bs, sector_num, buf1, n1);
if (ret < 0) {
--
1.8.3.1
^ permalink raw reply related [flat|nested] 56+ messages in thread
* [Qemu-devel] [PULL 29/42] block: introduce bdrv_get_block_status API
2013-09-06 15:38 [Qemu-devel] [PULL 00/42] Block patches Stefan Hajnoczi
` (27 preceding siblings ...)
2013-09-06 15:38 ` [Qemu-devel] [PULL 28/42] block: make bdrv_has_zero_init return false for copy-on-write-images Stefan Hajnoczi
@ 2013-09-06 15:39 ` Stefan Hajnoczi
2013-09-06 15:39 ` [Qemu-devel] [PULL 30/42] block: define get_block_status return value Stefan Hajnoczi
` (12 subsequent siblings)
41 siblings, 0 replies; 56+ messages in thread
From: Stefan Hajnoczi @ 2013-09-06 15:39 UTC (permalink / raw)
To: qemu-devel; +Cc: Paolo Bonzini, Stefan Hajnoczi, Anthony Liguori
From: Paolo Bonzini <pbonzini@redhat.com>
For now, bdrv_get_block_status is just another name for bdrv_is_allocated.
The next patches will add more flags.
This also touches all block drivers with a mostly mechanical rename. The
sole exception is cow; because it calls cow_co_is_allocated from the read
code, we keep that function and make cow_co_get_block_status a wrapper.
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
block.c | 46 ++++++++++++++++++++++++++--------------------
block/cow.c | 8 +++++++-
block/qcow.c | 4 ++--
block/qcow2.c | 4 ++--
block/qed.c | 4 ++--
block/raw-posix.c | 4 ++--
block/raw_bsd.c | 10 +++++-----
block/sheepdog.c | 12 ++++++------
block/vdi.c | 4 ++--
block/vmdk.c | 4 ++--
block/vvfat.c | 4 ++--
include/block/block.h | 2 ++
include/block/block_int.h | 2 +-
13 files changed, 61 insertions(+), 47 deletions(-)
diff --git a/block.c b/block.c
index 2a90893..a5bfe74 100644
--- a/block.c
+++ b/block.c
@@ -3044,15 +3044,15 @@ int bdrv_has_zero_init(BlockDriverState *bs)
return 0;
}
-typedef struct BdrvCoIsAllocatedData {
+typedef struct BdrvCoGetBlockStatusData {
BlockDriverState *bs;
BlockDriverState *base;
int64_t sector_num;
int nb_sectors;
int *pnum;
- int ret;
+ int64_t ret;
bool done;
-} BdrvCoIsAllocatedData;
+} BdrvCoGetBlockStatusData;
/*
* Returns true iff the specified sector is present in the disk image. Drivers
@@ -3069,9 +3069,9 @@ typedef struct BdrvCoIsAllocatedData {
* 'nb_sectors' is the max value 'pnum' should be set to. If nb_sectors goes
* beyond the end of the disk image it will be clamped.
*/
-static int coroutine_fn bdrv_co_is_allocated(BlockDriverState *bs,
- int64_t sector_num,
- int nb_sectors, int *pnum)
+static int64_t coroutine_fn bdrv_co_get_block_status(BlockDriverState *bs,
+ int64_t sector_num,
+ int nb_sectors, int *pnum)
{
int64_t length;
int64_t n;
@@ -3091,35 +3091,35 @@ static int coroutine_fn bdrv_co_is_allocated(BlockDriverState *bs,
nb_sectors = n;
}
- if (!bs->drv->bdrv_co_is_allocated) {
+ if (!bs->drv->bdrv_co_get_block_status) {
*pnum = nb_sectors;
return 1;
}
- return bs->drv->bdrv_co_is_allocated(bs, sector_num, nb_sectors, pnum);
+ return bs->drv->bdrv_co_get_block_status(bs, sector_num, nb_sectors, pnum);
}
-/* Coroutine wrapper for bdrv_is_allocated() */
-static void coroutine_fn bdrv_is_allocated_co_entry(void *opaque)
+/* Coroutine wrapper for bdrv_get_block_status() */
+static void coroutine_fn bdrv_get_block_status_co_entry(void *opaque)
{
- BdrvCoIsAllocatedData *data = opaque;
+ BdrvCoGetBlockStatusData *data = opaque;
BlockDriverState *bs = data->bs;
- data->ret = bdrv_co_is_allocated(bs, data->sector_num, data->nb_sectors,
- data->pnum);
+ data->ret = bdrv_co_get_block_status(bs, data->sector_num, data->nb_sectors,
+ data->pnum);
data->done = true;
}
/*
- * Synchronous wrapper around bdrv_co_is_allocated().
+ * Synchronous wrapper around bdrv_co_get_block_status().
*
- * See bdrv_co_is_allocated() for details.
+ * See bdrv_co_get_block_status() for details.
*/
-int bdrv_is_allocated(BlockDriverState *bs, int64_t sector_num, int nb_sectors,
- int *pnum)
+int64_t bdrv_get_block_status(BlockDriverState *bs, int64_t sector_num,
+ int nb_sectors, int *pnum)
{
Coroutine *co;
- BdrvCoIsAllocatedData data = {
+ BdrvCoGetBlockStatusData data = {
.bs = bs,
.sector_num = sector_num,
.nb_sectors = nb_sectors,
@@ -3129,9 +3129,9 @@ int bdrv_is_allocated(BlockDriverState *bs, int64_t sector_num, int nb_sectors,
if (qemu_in_coroutine()) {
/* Fast-path if already in coroutine context */
- bdrv_is_allocated_co_entry(&data);
+ bdrv_get_block_status_co_entry(&data);
} else {
- co = qemu_coroutine_create(bdrv_is_allocated_co_entry);
+ co = qemu_coroutine_create(bdrv_get_block_status_co_entry);
qemu_coroutine_enter(co, &data);
while (!data.done) {
qemu_aio_wait();
@@ -3140,6 +3140,12 @@ int bdrv_is_allocated(BlockDriverState *bs, int64_t sector_num, int nb_sectors,
return data.ret;
}
+int coroutine_fn bdrv_is_allocated(BlockDriverState *bs, int64_t sector_num,
+ int nb_sectors, int *pnum)
+{
+ return bdrv_get_block_status(bs, sector_num, nb_sectors, pnum);
+}
+
/*
* Given an image chain: ... -> [BASE] -> [INTER1] -> [INTER2] -> [TOP]
*
diff --git a/block/cow.c b/block/cow.c
index 7450801..d4b8c6b 100644
--- a/block/cow.c
+++ b/block/cow.c
@@ -188,6 +188,12 @@ static int coroutine_fn cow_co_is_allocated(BlockDriverState *bs,
return changed;
}
+static int64_t coroutine_fn cow_co_get_block_status(BlockDriverState *bs,
+ int64_t sector_num, int nb_sectors, int *num_same)
+{
+ return cow_co_is_allocated(bs, sector_num, nb_sectors, num_same);
+}
+
static int cow_update_bitmap(BlockDriverState *bs, int64_t sector_num,
int nb_sectors)
{
@@ -371,7 +377,7 @@ static BlockDriver bdrv_cow = {
.bdrv_read = cow_co_read,
.bdrv_write = cow_co_write,
- .bdrv_co_is_allocated = cow_co_is_allocated,
+ .bdrv_co_get_block_status = cow_co_get_block_status,
.create_options = cow_create_options,
};
diff --git a/block/qcow.c b/block/qcow.c
index 6b891ac..0d76656 100644
--- a/block/qcow.c
+++ b/block/qcow.c
@@ -395,7 +395,7 @@ static uint64_t get_cluster_offset(BlockDriverState *bs,
return cluster_offset;
}
-static int coroutine_fn qcow_co_is_allocated(BlockDriverState *bs,
+static int64_t coroutine_fn qcow_co_get_block_status(BlockDriverState *bs,
int64_t sector_num, int nb_sectors, int *pnum)
{
BDRVQcowState *s = bs->opaque;
@@ -896,7 +896,7 @@ static BlockDriver bdrv_qcow = {
.bdrv_co_readv = qcow_co_readv,
.bdrv_co_writev = qcow_co_writev,
- .bdrv_co_is_allocated = qcow_co_is_allocated,
+ .bdrv_co_get_block_status = qcow_co_get_block_status,
.bdrv_set_key = qcow_set_key,
.bdrv_make_empty = qcow_make_empty,
diff --git a/block/qcow2.c b/block/qcow2.c
index cf03a14..c220654 100644
--- a/block/qcow2.c
+++ b/block/qcow2.c
@@ -688,7 +688,7 @@ static int qcow2_reopen_prepare(BDRVReopenState *state,
return 0;
}
-static int coroutine_fn qcow2_co_is_allocated(BlockDriverState *bs,
+static int64_t coroutine_fn qcow2_co_get_block_status(BlockDriverState *bs,
int64_t sector_num, int nb_sectors, int *pnum)
{
BDRVQcowState *s = bs->opaque;
@@ -1866,7 +1866,7 @@ static BlockDriver bdrv_qcow2 = {
.bdrv_reopen_prepare = qcow2_reopen_prepare,
.bdrv_create = qcow2_create,
.bdrv_has_zero_init = bdrv_has_zero_init_1,
- .bdrv_co_is_allocated = qcow2_co_is_allocated,
+ .bdrv_co_get_block_status = qcow2_co_get_block_status,
.bdrv_set_key = qcow2_set_key,
.bdrv_make_empty = qcow2_make_empty,
diff --git a/block/qed.c b/block/qed.c
index 9712a42..86bf179 100644
--- a/block/qed.c
+++ b/block/qed.c
@@ -667,7 +667,7 @@ static void qed_is_allocated_cb(void *opaque, int ret, uint64_t offset, size_t l
}
}
-static int coroutine_fn bdrv_qed_co_is_allocated(BlockDriverState *bs,
+static int64_t coroutine_fn bdrv_qed_co_get_block_status(BlockDriverState *bs,
int64_t sector_num,
int nb_sectors, int *pnum)
{
@@ -1575,7 +1575,7 @@ static BlockDriver bdrv_qed = {
.bdrv_reopen_prepare = bdrv_qed_reopen_prepare,
.bdrv_create = bdrv_qed_create,
.bdrv_has_zero_init = bdrv_has_zero_init_1,
- .bdrv_co_is_allocated = bdrv_qed_co_is_allocated,
+ .bdrv_co_get_block_status = bdrv_qed_co_get_block_status,
.bdrv_make_empty = bdrv_qed_make_empty,
.bdrv_aio_readv = bdrv_qed_aio_readv,
.bdrv_aio_writev = bdrv_qed_aio_writev,
diff --git a/block/raw-posix.c b/block/raw-posix.c
index ba721d3..dbc65b0 100644
--- a/block/raw-posix.c
+++ b/block/raw-posix.c
@@ -1084,7 +1084,7 @@ static int raw_create(const char *filename, QEMUOptionParameter *options)
* 'nb_sectors' is the max value 'pnum' should be set to. If nb_sectors goes
* beyond the end of the disk image it will be clamped.
*/
-static int coroutine_fn raw_co_is_allocated(BlockDriverState *bs,
+static int64_t coroutine_fn raw_co_get_block_status(BlockDriverState *bs,
int64_t sector_num,
int nb_sectors, int *pnum)
{
@@ -1200,7 +1200,7 @@ static BlockDriver bdrv_file = {
.bdrv_close = raw_close,
.bdrv_create = raw_create,
.bdrv_has_zero_init = bdrv_has_zero_init_1,
- .bdrv_co_is_allocated = raw_co_is_allocated,
+ .bdrv_co_get_block_status = raw_co_get_block_status,
.bdrv_aio_readv = raw_aio_readv,
.bdrv_aio_writev = raw_aio_writev,
diff --git a/block/raw_bsd.c b/block/raw_bsd.c
index 926712e..a9060ca 100644
--- a/block/raw_bsd.c
+++ b/block/raw_bsd.c
@@ -58,11 +58,11 @@ static int coroutine_fn raw_co_writev(BlockDriverState *bs, int64_t sector_num,
return bdrv_co_writev(bs->file, sector_num, nb_sectors, qiov);
}
-static int coroutine_fn raw_co_is_allocated(BlockDriverState *bs,
- int64_t sector_num, int nb_sectors,
- int *pnum)
+static int64_t coroutine_fn raw_co_get_block_status(BlockDriverState *bs,
+ int64_t sector_num,
+ int nb_sectors, int *pnum)
{
- return bdrv_is_allocated(bs->file, sector_num, nb_sectors, pnum);
+ return bdrv_get_block_status(bs->file, sector_num, nb_sectors, pnum);
}
static int coroutine_fn raw_co_write_zeroes(BlockDriverState *bs,
@@ -164,7 +164,7 @@ static BlockDriver bdrv_raw = {
.bdrv_co_writev = &raw_co_writev,
.bdrv_co_write_zeroes = &raw_co_write_zeroes,
.bdrv_co_discard = &raw_co_discard,
- .bdrv_co_is_allocated = &raw_co_is_allocated,
+ .bdrv_co_get_block_status = &raw_co_get_block_status,
.bdrv_truncate = &raw_truncate,
.bdrv_getlength = &raw_getlength,
.bdrv_get_info = &raw_get_info,
diff --git a/block/sheepdog.c b/block/sheepdog.c
index 36c3cc8..7d3fc55 100644
--- a/block/sheepdog.c
+++ b/block/sheepdog.c
@@ -2270,9 +2270,9 @@ static coroutine_fn int sd_co_discard(BlockDriverState *bs, int64_t sector_num,
return acb->ret;
}
-static coroutine_fn int
-sd_co_is_allocated(BlockDriverState *bs, int64_t sector_num, int nb_sectors,
- int *pnum)
+static coroutine_fn int64_t
+sd_co_get_block_status(BlockDriverState *bs, int64_t sector_num, int nb_sectors,
+ int *pnum)
{
BDRVSheepdogState *s = bs->opaque;
SheepdogInode *inode = &s->inode;
@@ -2338,7 +2338,7 @@ static BlockDriver bdrv_sheepdog = {
.bdrv_co_writev = sd_co_writev,
.bdrv_co_flush_to_disk = sd_co_flush_to_disk,
.bdrv_co_discard = sd_co_discard,
- .bdrv_co_is_allocated = sd_co_is_allocated,
+ .bdrv_co_get_block_status = sd_co_get_block_status,
.bdrv_snapshot_create = sd_snapshot_create,
.bdrv_snapshot_goto = sd_snapshot_goto,
@@ -2366,7 +2366,7 @@ static BlockDriver bdrv_sheepdog_tcp = {
.bdrv_co_writev = sd_co_writev,
.bdrv_co_flush_to_disk = sd_co_flush_to_disk,
.bdrv_co_discard = sd_co_discard,
- .bdrv_co_is_allocated = sd_co_is_allocated,
+ .bdrv_co_get_block_status = sd_co_get_block_status,
.bdrv_snapshot_create = sd_snapshot_create,
.bdrv_snapshot_goto = sd_snapshot_goto,
@@ -2394,7 +2394,7 @@ static BlockDriver bdrv_sheepdog_unix = {
.bdrv_co_writev = sd_co_writev,
.bdrv_co_flush_to_disk = sd_co_flush_to_disk,
.bdrv_co_discard = sd_co_discard,
- .bdrv_co_is_allocated = sd_co_is_allocated,
+ .bdrv_co_get_block_status = sd_co_get_block_status,
.bdrv_snapshot_create = sd_snapshot_create,
.bdrv_snapshot_goto = sd_snapshot_goto,
diff --git a/block/vdi.c b/block/vdi.c
index 8a91525..7ab2567 100644
--- a/block/vdi.c
+++ b/block/vdi.c
@@ -470,7 +470,7 @@ static int vdi_reopen_prepare(BDRVReopenState *state,
return 0;
}
-static int coroutine_fn vdi_co_is_allocated(BlockDriverState *bs,
+static int64_t coroutine_fn vdi_co_get_block_status(BlockDriverState *bs,
int64_t sector_num, int nb_sectors, int *pnum)
{
/* TODO: Check for too large sector_num (in bdrv_is_allocated or here). */
@@ -780,7 +780,7 @@ static BlockDriver bdrv_vdi = {
.bdrv_reopen_prepare = vdi_reopen_prepare,
.bdrv_create = vdi_create,
.bdrv_has_zero_init = bdrv_has_zero_init_1,
- .bdrv_co_is_allocated = vdi_co_is_allocated,
+ .bdrv_co_get_block_status = vdi_co_get_block_status,
.bdrv_make_empty = vdi_make_empty,
.bdrv_read = vdi_co_read,
diff --git a/block/vmdk.c b/block/vmdk.c
index 9f82c45..23b4954 100644
--- a/block/vmdk.c
+++ b/block/vmdk.c
@@ -1042,7 +1042,7 @@ static VmdkExtent *find_extent(BDRVVmdkState *s,
return NULL;
}
-static int coroutine_fn vmdk_co_is_allocated(BlockDriverState *bs,
+static int64_t coroutine_fn vmdk_co_get_block_status(BlockDriverState *bs,
int64_t sector_num, int nb_sectors, int *pnum)
{
BDRVVmdkState *s = bs->opaque;
@@ -1837,7 +1837,7 @@ static BlockDriver bdrv_vmdk = {
.bdrv_close = vmdk_close,
.bdrv_create = vmdk_create,
.bdrv_co_flush_to_disk = vmdk_co_flush,
- .bdrv_co_is_allocated = vmdk_co_is_allocated,
+ .bdrv_co_get_block_status = vmdk_co_get_block_status,
.bdrv_get_allocated_file_size = vmdk_get_allocated_file_size,
.bdrv_has_zero_init = vmdk_has_zero_init,
diff --git a/block/vvfat.c b/block/vvfat.c
index 2178a13..2a5bca3 100644
--- a/block/vvfat.c
+++ b/block/vvfat.c
@@ -2874,7 +2874,7 @@ static coroutine_fn int vvfat_co_write(BlockDriverState *bs, int64_t sector_num,
return ret;
}
-static int coroutine_fn vvfat_co_is_allocated(BlockDriverState *bs,
+static int64_t coroutine_fn vvfat_co_get_block_status(BlockDriverState *bs,
int64_t sector_num, int nb_sectors, int* n)
{
BDRVVVFATState* s = bs->opaque;
@@ -2984,7 +2984,7 @@ static BlockDriver bdrv_vvfat = {
.bdrv_read = vvfat_co_read,
.bdrv_write = vvfat_co_write,
- .bdrv_co_is_allocated = vvfat_co_is_allocated,
+ .bdrv_co_get_block_status = vvfat_co_get_block_status,
};
static void bdrv_vvfat_init(void)
diff --git a/include/block/block.h b/include/block/block.h
index 5469c94..0b83321 100644
--- a/include/block/block.h
+++ b/include/block/block.h
@@ -269,6 +269,8 @@ int bdrv_discard(BlockDriverState *bs, int64_t sector_num, int nb_sectors);
int bdrv_co_discard(BlockDriverState *bs, int64_t sector_num, int nb_sectors);
int bdrv_has_zero_init_1(BlockDriverState *bs);
int bdrv_has_zero_init(BlockDriverState *bs);
+int64_t bdrv_get_block_status(BlockDriverState *bs, int64_t sector_num,
+ int nb_sectors, int *pnum);
int bdrv_is_allocated(BlockDriverState *bs, int64_t sector_num, int nb_sectors,
int *pnum);
int bdrv_is_allocated_above(BlockDriverState *top, BlockDriverState *base,
diff --git a/include/block/block_int.h b/include/block/block_int.h
index b9212b8..7c35198 100644
--- a/include/block/block_int.h
+++ b/include/block/block_int.h
@@ -118,7 +118,7 @@ struct BlockDriver {
int64_t sector_num, int nb_sectors);
int coroutine_fn (*bdrv_co_discard)(BlockDriverState *bs,
int64_t sector_num, int nb_sectors);
- int coroutine_fn (*bdrv_co_is_allocated)(BlockDriverState *bs,
+ int64_t coroutine_fn (*bdrv_co_get_block_status)(BlockDriverState *bs,
int64_t sector_num, int nb_sectors, int *pnum);
/*
--
1.8.3.1
^ permalink raw reply related [flat|nested] 56+ messages in thread
* [Qemu-devel] [PULL 30/42] block: define get_block_status return value
2013-09-06 15:38 [Qemu-devel] [PULL 00/42] Block patches Stefan Hajnoczi
` (28 preceding siblings ...)
2013-09-06 15:39 ` [Qemu-devel] [PULL 29/42] block: introduce bdrv_get_block_status API Stefan Hajnoczi
@ 2013-09-06 15:39 ` Stefan Hajnoczi
2013-09-13 8:04 ` Peter Lieven
2013-09-06 15:39 ` [Qemu-devel] [PULL 31/42] block: return get_block_status data and flags for formats Stefan Hajnoczi
` (11 subsequent siblings)
41 siblings, 1 reply; 56+ messages in thread
From: Stefan Hajnoczi @ 2013-09-06 15:39 UTC (permalink / raw)
To: qemu-devel; +Cc: Paolo Bonzini, Stefan Hajnoczi, Anthony Liguori
From: Paolo Bonzini <pbonzini@redhat.com>
Define the return value of get_block_status. Bits 0, 1, 2 and 9-62
are valid; bit 63 (the sign bit) is reserved for errors. Bits 3-8
are left for future extensions.
The return code is compatible with the old is_allocated API: if a driver
only returns 0 or 1 (aka BDRV_BLOCK_DATA) like is_allocated used to,
clients of is_allocated will not have any change in behavior. Still,
we will return more precise information in the next patches and the
new definition of bdrv_is_allocated is already prepared for this.
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
block.c | 10 ++++++++--
include/block/block.h | 26 ++++++++++++++++++++++++++
2 files changed, 34 insertions(+), 2 deletions(-)
diff --git a/block.c b/block.c
index a5bfe74..97406ec 100644
--- a/block.c
+++ b/block.c
@@ -3093,7 +3093,7 @@ static int64_t coroutine_fn bdrv_co_get_block_status(BlockDriverState *bs,
if (!bs->drv->bdrv_co_get_block_status) {
*pnum = nb_sectors;
- return 1;
+ return BDRV_BLOCK_DATA;
}
return bs->drv->bdrv_co_get_block_status(bs, sector_num, nb_sectors, pnum);
@@ -3143,7 +3143,13 @@ int64_t bdrv_get_block_status(BlockDriverState *bs, int64_t sector_num,
int coroutine_fn bdrv_is_allocated(BlockDriverState *bs, int64_t sector_num,
int nb_sectors, int *pnum)
{
- return bdrv_get_block_status(bs, sector_num, nb_sectors, pnum);
+ int64_t ret = bdrv_get_block_status(bs, sector_num, nb_sectors, pnum);
+ if (ret < 0) {
+ return ret;
+ }
+ return
+ (ret & BDRV_BLOCK_DATA) ||
+ ((ret & BDRV_BLOCK_ZERO) && !bdrv_has_zero_init(bs));
}
/*
diff --git a/include/block/block.h b/include/block/block.h
index 0b83321..728ec1a 100644
--- a/include/block/block.h
+++ b/include/block/block.h
@@ -81,6 +81,32 @@ typedef struct BlockDevOps {
#define BDRV_SECTOR_SIZE (1ULL << BDRV_SECTOR_BITS)
#define BDRV_SECTOR_MASK ~(BDRV_SECTOR_SIZE - 1)
+/* BDRV_BLOCK_DATA: data is read from bs->file or another file
+ * BDRV_BLOCK_ZERO: sectors read as zero
+ * BDRV_BLOCK_OFFSET_VALID: sector stored in bs->file as raw data
+ *
+ * If BDRV_BLOCK_OFFSET_VALID is set, bits 9-62 represent the offset in
+ * bs->file where sector data can be read from as raw data.
+ *
+ * DATA == 0 && ZERO == 0 means that data is read from backing_hd if present.
+ *
+ * DATA ZERO OFFSET_VALID
+ * t t t sectors read as zero, bs->file is zero at offset
+ * t f t sectors read as valid from bs->file at offset
+ * f t t sectors preallocated, read as zero, bs->file not
+ * necessarily zero at offset
+ * f f t sectors preallocated but read from backing_hd,
+ * bs->file contains garbage at offset
+ * t t f sectors preallocated, read as zero, unknown offset
+ * t f f sectors read from unknown file or offset
+ * f t f not allocated or unknown offset, read as zero
+ * f f f not allocated or unknown offset, read from backing_hd
+ */
+#define BDRV_BLOCK_DATA 1
+#define BDRV_BLOCK_ZERO 2
+#define BDRV_BLOCK_OFFSET_VALID 4
+#define BDRV_BLOCK_OFFSET_MASK BDRV_SECTOR_MASK
+
typedef enum {
BDRV_ACTION_REPORT, BDRV_ACTION_IGNORE, BDRV_ACTION_STOP
} BlockErrorAction;
--
1.8.3.1
^ permalink raw reply related [flat|nested] 56+ messages in thread
* [Qemu-devel] [PULL 31/42] block: return get_block_status data and flags for formats
2013-09-06 15:38 [Qemu-devel] [PULL 00/42] Block patches Stefan Hajnoczi
` (29 preceding siblings ...)
2013-09-06 15:39 ` [Qemu-devel] [PULL 30/42] block: define get_block_status return value Stefan Hajnoczi
@ 2013-09-06 15:39 ` Stefan Hajnoczi
2013-09-06 15:39 ` [Qemu-devel] [PULL 32/42] block: use bdrv_has_zero_init to return BDRV_BLOCK_ZERO Stefan Hajnoczi
` (10 subsequent siblings)
41 siblings, 0 replies; 56+ messages in thread
From: Stefan Hajnoczi @ 2013-09-06 15:39 UTC (permalink / raw)
To: qemu-devel; +Cc: Paolo Bonzini, Stefan Hajnoczi, Anthony Liguori
From: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
block/cow.c | 8 +++++++-
block/qcow.c | 9 ++++++++-
block/qcow2.c | 16 ++++++++++++++--
block/qed.c | 35 ++++++++++++++++++++++++++++-------
block/sheepdog.c | 2 +-
block/vdi.c | 13 ++++++++++++-
block/vmdk.c | 19 ++++++++++++++++++-
block/vvfat.c | 11 ++++++-----
8 files changed, 94 insertions(+), 19 deletions(-)
diff --git a/block/cow.c b/block/cow.c
index d4b8c6b..764b93f 100644
--- a/block/cow.c
+++ b/block/cow.c
@@ -191,7 +191,13 @@ static int coroutine_fn cow_co_is_allocated(BlockDriverState *bs,
static int64_t coroutine_fn cow_co_get_block_status(BlockDriverState *bs,
int64_t sector_num, int nb_sectors, int *num_same)
{
- return cow_co_is_allocated(bs, sector_num, nb_sectors, num_same);
+ BDRVCowState *s = bs->opaque;
+ int ret = cow_co_is_allocated(bs, sector_num, nb_sectors, num_same);
+ int64_t offset = s->cow_sectors_offset + (sector_num << BDRV_SECTOR_BITS);
+ if (ret < 0) {
+ return ret;
+ }
+ return (ret ? BDRV_BLOCK_DATA : 0) | offset | BDRV_BLOCK_OFFSET_VALID;
}
static int cow_update_bitmap(BlockDriverState *bs, int64_t sector_num,
diff --git a/block/qcow.c b/block/qcow.c
index 0d76656..93a993b 100644
--- a/block/qcow.c
+++ b/block/qcow.c
@@ -410,7 +410,14 @@ static int64_t coroutine_fn qcow_co_get_block_status(BlockDriverState *bs,
if (n > nb_sectors)
n = nb_sectors;
*pnum = n;
- return (cluster_offset != 0);
+ if (!cluster_offset) {
+ return 0;
+ }
+ if ((cluster_offset & QCOW_OFLAG_COMPRESSED) || s->crypt_method) {
+ return BDRV_BLOCK_DATA;
+ }
+ cluster_offset |= (index_in_cluster << BDRV_SECTOR_BITS);
+ return BDRV_BLOCK_DATA | BDRV_BLOCK_OFFSET_VALID | cluster_offset;
}
static int decompress_buffer(uint8_t *out_buf, int out_buf_size,
diff --git a/block/qcow2.c b/block/qcow2.c
index c220654..578792f 100644
--- a/block/qcow2.c
+++ b/block/qcow2.c
@@ -693,7 +693,8 @@ static int64_t coroutine_fn qcow2_co_get_block_status(BlockDriverState *bs,
{
BDRVQcowState *s = bs->opaque;
uint64_t cluster_offset;
- int ret;
+ int index_in_cluster, ret;
+ int64_t status = 0;
*pnum = nb_sectors;
qemu_co_mutex_lock(&s->lock);
@@ -703,7 +704,18 @@ static int64_t coroutine_fn qcow2_co_get_block_status(BlockDriverState *bs,
return ret;
}
- return (cluster_offset != 0) || (ret == QCOW2_CLUSTER_ZERO);
+ if (cluster_offset != 0 && ret != QCOW2_CLUSTER_COMPRESSED &&
+ !s->crypt_method) {
+ index_in_cluster = sector_num & (s->cluster_sectors - 1);
+ cluster_offset |= (index_in_cluster << BDRV_SECTOR_BITS);
+ status |= BDRV_BLOCK_OFFSET_VALID | cluster_offset;
+ }
+ if (ret == QCOW2_CLUSTER_ZERO) {
+ status |= BDRV_BLOCK_ZERO;
+ } else if (ret != QCOW2_CLUSTER_UNALLOCATED) {
+ status |= BDRV_BLOCK_DATA;
+ }
+ return status;
}
/* handle reading after the end of the backing file */
diff --git a/block/qed.c b/block/qed.c
index 86bf179..49b3a37 100644
--- a/block/qed.c
+++ b/block/qed.c
@@ -652,16 +652,36 @@ static int bdrv_qed_create(const char *filename, QEMUOptionParameter *options)
}
typedef struct {
+ BlockDriverState *bs;
Coroutine *co;
- int is_allocated;
+ uint64_t pos;
+ int64_t status;
int *pnum;
} QEDIsAllocatedCB;
static void qed_is_allocated_cb(void *opaque, int ret, uint64_t offset, size_t len)
{
QEDIsAllocatedCB *cb = opaque;
+ BDRVQEDState *s = cb->bs->opaque;
*cb->pnum = len / BDRV_SECTOR_SIZE;
- cb->is_allocated = (ret == QED_CLUSTER_FOUND || ret == QED_CLUSTER_ZERO);
+ switch (ret) {
+ case QED_CLUSTER_FOUND:
+ offset |= qed_offset_into_cluster(s, cb->pos);
+ cb->status = BDRV_BLOCK_DATA | BDRV_BLOCK_OFFSET_VALID | offset;
+ break;
+ case QED_CLUSTER_ZERO:
+ cb->status = BDRV_BLOCK_ZERO;
+ break;
+ case QED_CLUSTER_L2:
+ case QED_CLUSTER_L1:
+ cb->status = 0;
+ break;
+ default:
+ assert(ret < 0);
+ cb->status = ret;
+ break;
+ }
+
if (cb->co) {
qemu_coroutine_enter(cb->co, NULL);
}
@@ -672,25 +692,26 @@ static int64_t coroutine_fn bdrv_qed_co_get_block_status(BlockDriverState *bs,
int nb_sectors, int *pnum)
{
BDRVQEDState *s = bs->opaque;
- uint64_t pos = (uint64_t)sector_num * BDRV_SECTOR_SIZE;
size_t len = (size_t)nb_sectors * BDRV_SECTOR_SIZE;
QEDIsAllocatedCB cb = {
- .is_allocated = -1,
+ .bs = bs,
+ .pos = (uint64_t)sector_num * BDRV_SECTOR_SIZE,
+ .status = BDRV_BLOCK_OFFSET_MASK,
.pnum = pnum,
};
QEDRequest request = { .l2_table = NULL };
- qed_find_cluster(s, &request, pos, len, qed_is_allocated_cb, &cb);
+ qed_find_cluster(s, &request, cb.pos, len, qed_is_allocated_cb, &cb);
/* Now sleep if the callback wasn't invoked immediately */
- while (cb.is_allocated == -1) {
+ while (cb.status == BDRV_BLOCK_OFFSET_MASK) {
cb.co = qemu_coroutine_self();
qemu_coroutine_yield();
}
qed_unref_l2_cache_entry(request.l2_table);
- return cb.is_allocated;
+ return cb.status;
}
static int bdrv_qed_make_empty(BlockDriverState *bs)
diff --git a/block/sheepdog.c b/block/sheepdog.c
index 7d3fc55..f9988d3 100644
--- a/block/sheepdog.c
+++ b/block/sheepdog.c
@@ -2280,7 +2280,7 @@ sd_co_get_block_status(BlockDriverState *bs, int64_t sector_num, int nb_sectors,
end = DIV_ROUND_UP((sector_num + nb_sectors) *
BDRV_SECTOR_SIZE, SD_DATA_OBJ_SIZE);
unsigned long idx;
- int ret = 1;
+ int64_t ret = BDRV_BLOCK_DATA;
for (idx = start; idx < end; idx++) {
if (inode->data_vdi_id[idx] == 0) {
diff --git a/block/vdi.c b/block/vdi.c
index 7ab2567..1bf7dc5 100644
--- a/block/vdi.c
+++ b/block/vdi.c
@@ -479,12 +479,23 @@ static int64_t coroutine_fn vdi_co_get_block_status(BlockDriverState *bs,
size_t sector_in_block = sector_num % s->block_sectors;
int n_sectors = s->block_sectors - sector_in_block;
uint32_t bmap_entry = le32_to_cpu(s->bmap[bmap_index]);
+ uint64_t offset;
+ int result;
+
logout("%p, %" PRId64 ", %d, %p\n", bs, sector_num, nb_sectors, pnum);
if (n_sectors > nb_sectors) {
n_sectors = nb_sectors;
}
*pnum = n_sectors;
- return VDI_IS_ALLOCATED(bmap_entry);
+ result = VDI_IS_ALLOCATED(bmap_entry);
+ if (!result) {
+ return 0;
+ }
+
+ offset = s->header.offset_data +
+ (uint64_t)bmap_entry * s->block_size +
+ sector_in_block * SECTOR_SIZE;
+ return BDRV_BLOCK_DATA | BDRV_BLOCK_OFFSET_VALID | offset;
}
static int vdi_co_read(BlockDriverState *bs,
diff --git a/block/vmdk.c b/block/vmdk.c
index 23b4954..fb5b529 100644
--- a/block/vmdk.c
+++ b/block/vmdk.c
@@ -1059,7 +1059,24 @@ static int64_t coroutine_fn vmdk_co_get_block_status(BlockDriverState *bs,
sector_num * 512, 0, &offset);
qemu_co_mutex_unlock(&s->lock);
- ret = (ret == VMDK_OK || ret == VMDK_ZEROED);
+ switch (ret) {
+ case VMDK_ERROR:
+ ret = -EIO;
+ break;
+ case VMDK_UNALLOC:
+ ret = 0;
+ break;
+ case VMDK_ZEROED:
+ ret = BDRV_BLOCK_ZERO;
+ break;
+ case VMDK_OK:
+ ret = BDRV_BLOCK_DATA;
+ if (extent->file == bs->file) {
+ ret |= BDRV_BLOCK_OFFSET_VALID | offset;
+ }
+
+ break;
+ }
index_in_cluster = sector_num % extent->cluster_sectors;
n = extent->cluster_sectors - index_in_cluster;
diff --git a/block/vvfat.c b/block/vvfat.c
index 2a5bca3..0129195 100644
--- a/block/vvfat.c
+++ b/block/vvfat.c
@@ -2879,11 +2879,12 @@ static int64_t coroutine_fn vvfat_co_get_block_status(BlockDriverState *bs,
{
BDRVVVFATState* s = bs->opaque;
*n = s->sector_count - sector_num;
- if (*n > nb_sectors)
- *n = nb_sectors;
- else if (*n < 0)
- return 0;
- return 1;
+ if (*n > nb_sectors) {
+ *n = nb_sectors;
+ } else if (*n < 0) {
+ return 0;
+ }
+ return BDRV_BLOCK_DATA;
}
static int write_target_commit(BlockDriverState *bs, int64_t sector_num,
--
1.8.3.1
^ permalink raw reply related [flat|nested] 56+ messages in thread
* [Qemu-devel] [PULL 32/42] block: use bdrv_has_zero_init to return BDRV_BLOCK_ZERO
2013-09-06 15:38 [Qemu-devel] [PULL 00/42] Block patches Stefan Hajnoczi
` (30 preceding siblings ...)
2013-09-06 15:39 ` [Qemu-devel] [PULL 31/42] block: return get_block_status data and flags for formats Stefan Hajnoczi
@ 2013-09-06 15:39 ` Stefan Hajnoczi
2013-09-06 15:39 ` [Qemu-devel] [PULL 33/42] block: return BDRV_BLOCK_ZERO past end of backing file Stefan Hajnoczi
` (9 subsequent siblings)
41 siblings, 0 replies; 56+ messages in thread
From: Stefan Hajnoczi @ 2013-09-06 15:39 UTC (permalink / raw)
To: qemu-devel; +Cc: Paolo Bonzini, Stefan Hajnoczi, Anthony Liguori
From: Paolo Bonzini <pbonzini@redhat.com>
Alternatively, this could use a "discard zeroes data" flag returned
by bdrv_get_info.
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
block.c | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/block.c b/block.c
index 97406ec..aa9ec83 100644
--- a/block.c
+++ b/block.c
@@ -3075,6 +3075,7 @@ static int64_t coroutine_fn bdrv_co_get_block_status(BlockDriverState *bs,
{
int64_t length;
int64_t n;
+ int64_t ret;
length = bdrv_getlength(bs);
if (length < 0) {
@@ -3096,7 +3097,15 @@ static int64_t coroutine_fn bdrv_co_get_block_status(BlockDriverState *bs,
return BDRV_BLOCK_DATA;
}
- return bs->drv->bdrv_co_get_block_status(bs, sector_num, nb_sectors, pnum);
+ ret = bs->drv->bdrv_co_get_block_status(bs, sector_num, nb_sectors, pnum);
+ if (ret < 0) {
+ return ret;
+ }
+
+ if (!(ret & BDRV_BLOCK_DATA) && bdrv_has_zero_init(bs)) {
+ ret |= BDRV_BLOCK_ZERO;
+ }
+ return ret;
}
/* Coroutine wrapper for bdrv_get_block_status() */
--
1.8.3.1
^ permalink raw reply related [flat|nested] 56+ messages in thread
* [Qemu-devel] [PULL 33/42] block: return BDRV_BLOCK_ZERO past end of backing file
2013-09-06 15:38 [Qemu-devel] [PULL 00/42] Block patches Stefan Hajnoczi
` (31 preceding siblings ...)
2013-09-06 15:39 ` [Qemu-devel] [PULL 32/42] block: use bdrv_has_zero_init to return BDRV_BLOCK_ZERO Stefan Hajnoczi
@ 2013-09-06 15:39 ` Stefan Hajnoczi
2013-09-13 7:33 ` Peter Lieven
2013-09-06 15:39 ` [Qemu-devel] [PULL 34/42] qemu-img: add a "map" subcommand Stefan Hajnoczi
` (8 subsequent siblings)
41 siblings, 1 reply; 56+ messages in thread
From: Stefan Hajnoczi @ 2013-09-06 15:39 UTC (permalink / raw)
To: qemu-devel; +Cc: Paolo Bonzini, Stefan Hajnoczi, Anthony Liguori
From: Paolo Bonzini <pbonzini@redhat.com>
If the sectors are unallocated and we are past the end of the
backing file, they will read as zero.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
block.c | 12 ++++++++++--
1 file changed, 10 insertions(+), 2 deletions(-)
diff --git a/block.c b/block.c
index aa9ec83..82bbd6c 100644
--- a/block.c
+++ b/block.c
@@ -3102,8 +3102,16 @@ static int64_t coroutine_fn bdrv_co_get_block_status(BlockDriverState *bs,
return ret;
}
- if (!(ret & BDRV_BLOCK_DATA) && bdrv_has_zero_init(bs)) {
- ret |= BDRV_BLOCK_ZERO;
+ if (!(ret & BDRV_BLOCK_DATA)) {
+ if (bdrv_has_zero_init(bs)) {
+ ret |= BDRV_BLOCK_ZERO;
+ } else {
+ BlockDriverState *bs2 = bs->backing_hd;
+ int64_t length2 = bdrv_getlength(bs2);
+ if (length2 >= 0 && sector_num >= (length2 >> BDRV_SECTOR_BITS)) {
+ ret |= BDRV_BLOCK_ZERO;
+ }
+ }
}
return ret;
}
--
1.8.3.1
^ permalink raw reply related [flat|nested] 56+ messages in thread
* [Qemu-devel] [PULL 34/42] qemu-img: add a "map" subcommand
2013-09-06 15:38 [Qemu-devel] [PULL 00/42] Block patches Stefan Hajnoczi
` (32 preceding siblings ...)
2013-09-06 15:39 ` [Qemu-devel] [PULL 33/42] block: return BDRV_BLOCK_ZERO past end of backing file Stefan Hajnoczi
@ 2013-09-06 15:39 ` Stefan Hajnoczi
2013-09-06 15:39 ` [Qemu-devel] [PULL 35/42] docs, qapi: document qemu-img map Stefan Hajnoczi
` (7 subsequent siblings)
41 siblings, 0 replies; 56+ messages in thread
From: Stefan Hajnoczi @ 2013-09-06 15:39 UTC (permalink / raw)
To: qemu-devel; +Cc: Paolo Bonzini, Stefan Hajnoczi, Anthony Liguori
From: Paolo Bonzini <pbonzini@redhat.com>
This command dumps the metadata of an entire chain, in either tabular or JSON
format.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
qemu-img-cmds.hx | 6 ++
qemu-img.c | 191 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 197 insertions(+)
diff --git a/qemu-img-cmds.hx b/qemu-img-cmds.hx
index 2f6d579..0c36e59 100644
--- a/qemu-img-cmds.hx
+++ b/qemu-img-cmds.hx
@@ -45,6 +45,12 @@ STEXI
@item info [-f @var{fmt}] [--output=@var{ofmt}] [--backing-chain] @var{filename}
ETEXI
+DEF("map", img_map,
+ "map [-f fmt] [--output=ofmt] filename")
+STEXI
+@item map [-f @var{fmt}] [--output=@var{ofmt}] @var{filename}
+ETEXI
+
DEF("snapshot", img_snapshot,
"snapshot [-q] [-l | -a snapshot | -c snapshot | -d snapshot] filename")
STEXI
diff --git a/qemu-img.c b/qemu-img.c
index b074fa7..3e5e388 100644
--- a/qemu-img.c
+++ b/qemu-img.c
@@ -1801,6 +1801,197 @@ static int img_info(int argc, char **argv)
return 0;
}
+
+typedef struct MapEntry {
+ int flags;
+ int depth;
+ int64_t start;
+ int64_t length;
+ int64_t offset;
+ BlockDriverState *bs;
+} MapEntry;
+
+static void dump_map_entry(OutputFormat output_format, MapEntry *e,
+ MapEntry *next)
+{
+ switch (output_format) {
+ case OFORMAT_HUMAN:
+ if ((e->flags & BDRV_BLOCK_DATA) &&
+ !(e->flags & BDRV_BLOCK_OFFSET_VALID)) {
+ error_report("File contains external, encrypted or compressed clusters.");
+ exit(1);
+ }
+ if ((e->flags & (BDRV_BLOCK_DATA|BDRV_BLOCK_ZERO)) == BDRV_BLOCK_DATA) {
+ printf("%#-16"PRIx64"%#-16"PRIx64"%#-16"PRIx64"%s\n",
+ e->start, e->length, e->offset, e->bs->filename);
+ }
+ /* This format ignores the distinction between 0, ZERO and ZERO|DATA.
+ * Modify the flags here to allow more coalescing.
+ */
+ if (next &&
+ (next->flags & (BDRV_BLOCK_DATA|BDRV_BLOCK_ZERO)) != BDRV_BLOCK_DATA) {
+ next->flags &= ~BDRV_BLOCK_DATA;
+ next->flags |= BDRV_BLOCK_ZERO;
+ }
+ break;
+ case OFORMAT_JSON:
+ printf("%s{ \"start\": %"PRId64", \"length\": %"PRId64", \"depth\": %d,"
+ " \"zero\": %s, \"data\": %s",
+ (e->start == 0 ? "[" : ",\n"),
+ e->start, e->length, e->depth,
+ (e->flags & BDRV_BLOCK_ZERO) ? "true" : "false",
+ (e->flags & BDRV_BLOCK_DATA) ? "true" : "false");
+ if (e->flags & BDRV_BLOCK_OFFSET_VALID) {
+ printf(", 'offset': %"PRId64"", e->offset);
+ }
+ putchar('}');
+
+ if (!next) {
+ printf("]\n");
+ }
+ break;
+ }
+}
+
+static int get_block_status(BlockDriverState *bs, int64_t sector_num,
+ int nb_sectors, MapEntry *e)
+{
+ int64_t ret;
+ int depth;
+
+ /* As an optimization, we could cache the current range of unallocated
+ * clusters in each file of the chain, and avoid querying the same
+ * range repeatedly.
+ */
+
+ depth = 0;
+ for (;;) {
+ ret = bdrv_get_block_status(bs, sector_num, nb_sectors, &nb_sectors);
+ if (ret < 0) {
+ return ret;
+ }
+ assert(nb_sectors);
+ if (ret & (BDRV_BLOCK_ZERO|BDRV_BLOCK_DATA)) {
+ break;
+ }
+ bs = bs->backing_hd;
+ if (bs == NULL) {
+ ret = 0;
+ break;
+ }
+
+ depth++;
+ }
+
+ e->start = sector_num * BDRV_SECTOR_SIZE;
+ e->length = nb_sectors * BDRV_SECTOR_SIZE;
+ e->flags = ret & ~BDRV_BLOCK_OFFSET_MASK;
+ e->offset = ret & BDRV_BLOCK_OFFSET_MASK;
+ e->depth = depth;
+ e->bs = bs;
+ return 0;
+}
+
+static int img_map(int argc, char **argv)
+{
+ int c;
+ OutputFormat output_format = OFORMAT_HUMAN;
+ BlockDriverState *bs;
+ const char *filename, *fmt, *output;
+ int64_t length;
+ MapEntry curr = { .length = 0 }, next;
+ int ret = 0;
+
+ fmt = NULL;
+ output = NULL;
+ for (;;) {
+ int option_index = 0;
+ static const struct option long_options[] = {
+ {"help", no_argument, 0, 'h'},
+ {"format", required_argument, 0, 'f'},
+ {"output", required_argument, 0, OPTION_OUTPUT},
+ {0, 0, 0, 0}
+ };
+ c = getopt_long(argc, argv, "f:h",
+ long_options, &option_index);
+ if (c == -1) {
+ break;
+ }
+ switch (c) {
+ case '?':
+ case 'h':
+ help();
+ break;
+ case 'f':
+ fmt = optarg;
+ break;
+ case OPTION_OUTPUT:
+ output = optarg;
+ break;
+ }
+ }
+ if (optind >= argc) {
+ help();
+ }
+ filename = argv[optind++];
+
+ if (output && !strcmp(output, "json")) {
+ output_format = OFORMAT_JSON;
+ } else if (output && !strcmp(output, "human")) {
+ output_format = OFORMAT_HUMAN;
+ } else if (output) {
+ error_report("--output must be used with human or json as argument.");
+ return 1;
+ }
+
+ bs = bdrv_new_open(filename, fmt, BDRV_O_FLAGS, true, false);
+ if (!bs) {
+ return 1;
+ }
+
+ if (output_format == OFORMAT_HUMAN) {
+ printf("%-16s%-16s%-16s%s\n", "Offset", "Length", "Mapped to", "File");
+ }
+
+ length = bdrv_getlength(bs);
+ while (curr.start + curr.length < length) {
+ int64_t nsectors_left;
+ int64_t sector_num;
+ int n;
+
+ sector_num = (curr.start + curr.length) >> BDRV_SECTOR_BITS;
+
+ /* Probe up to 1 GiB at a time. */
+ nsectors_left = DIV_ROUND_UP(length, BDRV_SECTOR_SIZE) - sector_num;
+ n = MIN(1 << (30 - BDRV_SECTOR_BITS), nsectors_left);
+ ret = get_block_status(bs, sector_num, n, &next);
+
+ if (ret < 0) {
+ error_report("Could not read file metadata: %s", strerror(-ret));
+ goto out;
+ }
+
+ if (curr.length != 0 && curr.flags == next.flags &&
+ curr.depth == next.depth &&
+ ((curr.flags & BDRV_BLOCK_OFFSET_VALID) == 0 ||
+ curr.offset + curr.length == next.offset)) {
+ curr.length += next.length;
+ continue;
+ }
+
+ if (curr.length > 0) {
+ dump_map_entry(output_format, &curr, &next);
+ }
+ curr = next;
+ }
+
+ dump_map_entry(output_format, &curr, NULL);
+
+out:
+ bdrv_unref(bs);
+ return ret < 0;
+}
+
#define SNAPSHOT_LIST 1
#define SNAPSHOT_CREATE 2
#define SNAPSHOT_APPLY 3
--
1.8.3.1
^ permalink raw reply related [flat|nested] 56+ messages in thread
* [Qemu-devel] [PULL 35/42] docs, qapi: document qemu-img map
2013-09-06 15:38 [Qemu-devel] [PULL 00/42] Block patches Stefan Hajnoczi
` (33 preceding siblings ...)
2013-09-06 15:39 ` [Qemu-devel] [PULL 34/42] qemu-img: add a "map" subcommand Stefan Hajnoczi
@ 2013-09-06 15:39 ` Stefan Hajnoczi
2013-09-06 15:39 ` [Qemu-devel] [PULL 36/42] raw-posix: return get_block_status data and flags Stefan Hajnoczi
` (6 subsequent siblings)
41 siblings, 0 replies; 56+ messages in thread
From: Stefan Hajnoczi @ 2013-09-06 15:39 UTC (permalink / raw)
To: qemu-devel; +Cc: Paolo Bonzini, Stefan Hajnoczi, Anthony Liguori
From: Paolo Bonzini <pbonzini@redhat.com>
Eric Blake also requested including the output in qapi-schema.json,
so that it is published through the introspection mechanism.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
qapi-schema.json | 29 +++++++++++++++++++++++++++++
qemu-img.texi | 55 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 84 insertions(+)
diff --git a/qapi-schema.json b/qapi-schema.json
index 5d5164f..2b2c8bc 100644
--- a/qapi-schema.json
+++ b/qapi-schema.json
@@ -831,6 +831,35 @@
{ 'enum': 'BlockDeviceIoStatus', 'data': [ 'ok', 'failed', 'nospace' ] }
##
+# @BlockDeviceMapEntry:
+#
+# Entry in the metadata map of the device (returned by "qemu-img map")
+#
+# @start: Offset in the image of the first byte described by this entry
+# (in bytes)
+#
+# @length: Length of the range described by this entry (in bytes)
+#
+# @depth: Number of layers (0 = top image, 1 = top image's backing file, etc.)
+# before reaching one for which the range is allocated. The value is
+# in the range 0 to the depth of the image chain - 1.
+#
+# @zero: the sectors in this range read as zeros
+#
+# @data: reading the image will actually read data from a file (in particular,
+# if @offset is present this means that the sectors are not simply
+# preallocated, but contain actual data in raw format)
+#
+# @offset: if present, the image file stores the data for this range in
+# raw format at the given offset.
+#
+# Since 1.7
+##
+{ 'type': 'BlockDeviceMapEntry',
+ 'data': { 'start': 'int', 'length': 'int', 'depth': 'int', 'zero': 'bool',
+ 'data': 'bool', '*offset': 'int' } }
+
+##
# @BlockDirtyInfo:
#
# Block dirty bitmap information.
diff --git a/qemu-img.texi b/qemu-img.texi
index ad45a6d..43ee4eb 100644
--- a/qemu-img.texi
+++ b/qemu-img.texi
@@ -226,6 +226,61 @@ To enumerate information about each disk image in the above chain, starting from
qemu-img info --backing-chain snap2.qcow2
@end example
+@item map [-f @var{fmt}] [--output=@var{ofmt}] @var{filename}
+
+Dump the metadata of image @var{filename} and its backing file chain.
+In particular, this commands dumps the allocation state of every sector
+of @var{filename}, together with the topmost file that allocates it in
+the backing file chain.
+
+Two option formats are possible. The default format (@code{human})
+only dumps known-nonzero areas of the file. Known-zero parts of the
+file are omitted altogether, and likewise for parts that are not allocated
+throughout the chain. @command{qemu-img} output will identify a file
+from where the data can be read, and the offset in the file. Each line
+will include four fields, the first three of which are hexadecimal
+numbers. For example the first line of:
+@example
+Offset Length Mapped to File
+0 0x20000 0x50000 /tmp/overlay.qcow2
+0x100000 0x10000 0x95380000 /tmp/backing.qcow2
+@end example
+@noindent
+means that 0x20000 (131072) bytes starting at offset 0 in the image are
+available in /tmp/overlay.qcow2 (opened in @code{raw} format) starting
+at offset 0x50000 (327680). Data that is compressed, encrypted, or
+otherwise not available in raw format will cause an error if @code{human}
+format is in use. Note that file names can include newlines, thus it is
+not safe to parse this output format in scripts.
+
+The alternative format @code{json} will return an array of dictionaries
+in JSON format. It will include similar information in
+the @code{start}, @code{length}, @code{offset} fields;
+it will also include other more specific information:
+@itemize @minus
+@item
+whether the sectors contain actual data or not (boolean field @code{data};
+if false, the sectors are either unallocated or stored as optimized
+all-zero clusters);
+
+@item
+whether the data is known to read as zero (boolean field @code{zero});
+
+@item
+in order to make the output shorter, the target file is expressed as
+a @code{depth}; for example, a depth of 2 refers to the backing file
+of the backing file of @var{filename}.
+@end itemize
+
+In JSON format, the @code{offset} field is optional; it is absent in
+cases where @code{human} format would omit the entry or exit with an error.
+If @code{data} is false and the @code{offset} field is present, the
+corresponding sectors in the file are not yet in use, but they are
+preallocated.
+
+For more information, consult @file{include/block/block.h} in QEMU's
+source code.
+
@item snapshot [-l | -a @var{snapshot} | -c @var{snapshot} | -d @var{snapshot} ] @var{filename}
List, apply, create or delete snapshots in image @var{filename}.
--
1.8.3.1
^ permalink raw reply related [flat|nested] 56+ messages in thread
* [Qemu-devel] [PULL 36/42] raw-posix: return get_block_status data and flags
2013-09-06 15:38 [Qemu-devel] [PULL 00/42] Block patches Stefan Hajnoczi
` (34 preceding siblings ...)
2013-09-06 15:39 ` [Qemu-devel] [PULL 35/42] docs, qapi: document qemu-img map Stefan Hajnoczi
@ 2013-09-06 15:39 ` Stefan Hajnoczi
2013-09-06 15:39 ` [Qemu-devel] [PULL 37/42] raw-posix: report unwritten extents as zero Stefan Hajnoczi
` (5 subsequent siblings)
41 siblings, 0 replies; 56+ messages in thread
From: Stefan Hajnoczi @ 2013-09-06 15:39 UTC (permalink / raw)
To: qemu-devel; +Cc: Paolo Bonzini, Stefan Hajnoczi, Anthony Liguori
From: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
block/raw-posix.c | 17 ++++++++++-------
1 file changed, 10 insertions(+), 7 deletions(-)
diff --git a/block/raw-posix.c b/block/raw-posix.c
index dbc65b0..d011cfd 100644
--- a/block/raw-posix.c
+++ b/block/raw-posix.c
@@ -1089,7 +1089,7 @@ static int64_t coroutine_fn raw_co_get_block_status(BlockDriverState *bs,
int nb_sectors, int *pnum)
{
off_t start, data, hole;
- int ret;
+ int64_t ret;
ret = fd_open(bs);
if (ret < 0) {
@@ -1097,6 +1097,7 @@ static int64_t coroutine_fn raw_co_get_block_status(BlockDriverState *bs,
}
start = sector_num * BDRV_SECTOR_SIZE;
+ ret = BDRV_BLOCK_DATA | BDRV_BLOCK_OFFSET_VALID | start;
#ifdef CONFIG_FIEMAP
@@ -1114,7 +1115,7 @@ static int64_t coroutine_fn raw_co_get_block_status(BlockDriverState *bs,
if (ioctl(s->fd, FS_IOC_FIEMAP, &f) == -1) {
/* Assume everything is allocated. */
*pnum = nb_sectors;
- return 1;
+ return ret;
}
if (f.fm.fm_mapped_extents == 0) {
@@ -1141,7 +1142,7 @@ static int64_t coroutine_fn raw_co_get_block_status(BlockDriverState *bs,
/* Most likely EINVAL. Assume everything is allocated. */
*pnum = nb_sectors;
- return 1;
+ return ret;
}
if (hole > start) {
@@ -1154,19 +1155,21 @@ static int64_t coroutine_fn raw_co_get_block_status(BlockDriverState *bs,
}
}
#else
- *pnum = nb_sectors;
- return 1;
+ data = 0;
+ hole = start + nb_sectors * BDRV_SECTOR_SIZE;
#endif
if (data <= start) {
/* On a data extent, compute sectors to the end of the extent. */
*pnum = MIN(nb_sectors, (hole - start) / BDRV_SECTOR_SIZE);
- return 1;
} else {
/* On a hole, compute sectors to the beginning of the next extent. */
*pnum = MIN(nb_sectors, (data - start) / BDRV_SECTOR_SIZE);
- return 0;
+ ret &= ~BDRV_BLOCK_DATA;
+ ret |= BDRV_BLOCK_ZERO;
}
+
+ return ret;
}
static coroutine_fn BlockDriverAIOCB *raw_aio_discard(BlockDriverState *bs,
--
1.8.3.1
^ permalink raw reply related [flat|nested] 56+ messages in thread
* [Qemu-devel] [PULL 37/42] raw-posix: report unwritten extents as zero
2013-09-06 15:38 [Qemu-devel] [PULL 00/42] Block patches Stefan Hajnoczi
` (35 preceding siblings ...)
2013-09-06 15:39 ` [Qemu-devel] [PULL 36/42] raw-posix: return get_block_status data and flags Stefan Hajnoczi
@ 2013-09-06 15:39 ` Stefan Hajnoczi
2013-09-06 15:39 ` [Qemu-devel] [PULL 38/42] block: add default get_block_status implementation for protocols Stefan Hajnoczi
` (4 subsequent siblings)
41 siblings, 0 replies; 56+ messages in thread
From: Stefan Hajnoczi @ 2013-09-06 15:39 UTC (permalink / raw)
To: qemu-devel; +Cc: Paolo Bonzini, Stefan Hajnoczi, Anthony Liguori
From: Paolo Bonzini <pbonzini@redhat.com>
These are created for example with XFS_IOC_ZERO_RANGE.
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
block/raw-posix.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/block/raw-posix.c b/block/raw-posix.c
index d011cfd..1b41ea3 100644
--- a/block/raw-posix.c
+++ b/block/raw-posix.c
@@ -1128,6 +1128,9 @@ static int64_t coroutine_fn raw_co_get_block_status(BlockDriverState *bs,
} else {
data = f.fe.fe_logical;
hole = f.fe.fe_logical + f.fe.fe_length;
+ if (f.fe.fe_flags & FIEMAP_EXTENT_UNWRITTEN) {
+ ret |= BDRV_BLOCK_ZERO;
+ }
}
#elif defined SEEK_HOLE && defined SEEK_DATA
--
1.8.3.1
^ permalink raw reply related [flat|nested] 56+ messages in thread
* [Qemu-devel] [PULL 38/42] block: add default get_block_status implementation for protocols
2013-09-06 15:38 [Qemu-devel] [PULL 00/42] Block patches Stefan Hajnoczi
` (36 preceding siblings ...)
2013-09-06 15:39 ` [Qemu-devel] [PULL 37/42] raw-posix: report unwritten extents as zero Stefan Hajnoczi
@ 2013-09-06 15:39 ` Stefan Hajnoczi
2013-09-06 15:39 ` [Qemu-devel] [PULL 39/42] block: look for zero blocks in bs->file Stefan Hajnoczi
` (3 subsequent siblings)
41 siblings, 0 replies; 56+ messages in thread
From: Stefan Hajnoczi @ 2013-09-06 15:39 UTC (permalink / raw)
To: qemu-devel; +Cc: Paolo Bonzini, Stefan Hajnoczi, Anthony Liguori
From: Paolo Bonzini <pbonzini@redhat.com>
Protocols return raw data, so you can assume the offsets to pass
through unchanged.
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
block.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/block.c b/block.c
index 82bbd6c..3c39769 100644
--- a/block.c
+++ b/block.c
@@ -3094,7 +3094,11 @@ static int64_t coroutine_fn bdrv_co_get_block_status(BlockDriverState *bs,
if (!bs->drv->bdrv_co_get_block_status) {
*pnum = nb_sectors;
- return BDRV_BLOCK_DATA;
+ ret = BDRV_BLOCK_DATA;
+ if (bs->drv->protocol_name) {
+ ret |= BDRV_BLOCK_OFFSET_VALID | (sector_num * BDRV_SECTOR_SIZE);
+ }
+ return ret;
}
ret = bs->drv->bdrv_co_get_block_status(bs, sector_num, nb_sectors, pnum);
--
1.8.3.1
^ permalink raw reply related [flat|nested] 56+ messages in thread
* [Qemu-devel] [PULL 39/42] block: look for zero blocks in bs->file
2013-09-06 15:38 [Qemu-devel] [PULL 00/42] Block patches Stefan Hajnoczi
` (37 preceding siblings ...)
2013-09-06 15:39 ` [Qemu-devel] [PULL 38/42] block: add default get_block_status implementation for protocols Stefan Hajnoczi
@ 2013-09-06 15:39 ` Stefan Hajnoczi
2013-09-13 8:00 ` Peter Lieven
2013-09-06 15:39 ` [Qemu-devel] [PULL 40/42] dataplane: Fix startup race Stefan Hajnoczi
` (2 subsequent siblings)
41 siblings, 1 reply; 56+ messages in thread
From: Stefan Hajnoczi @ 2013-09-06 15:39 UTC (permalink / raw)
To: qemu-devel; +Cc: Paolo Bonzini, Stefan Hajnoczi, Anthony Liguori
From: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
block.c | 16 +++++++++++++++-
1 file changed, 15 insertions(+), 1 deletion(-)
diff --git a/block.c b/block.c
index 3c39769..a325efc 100644
--- a/block.c
+++ b/block.c
@@ -3075,7 +3075,7 @@ static int64_t coroutine_fn bdrv_co_get_block_status(BlockDriverState *bs,
{
int64_t length;
int64_t n;
- int64_t ret;
+ int64_t ret, ret2;
length = bdrv_getlength(bs);
if (length < 0) {
@@ -3117,6 +3117,20 @@ static int64_t coroutine_fn bdrv_co_get_block_status(BlockDriverState *bs,
}
}
}
+
+ if (bs->file &&
+ (ret & BDRV_BLOCK_DATA) && !(ret & BDRV_BLOCK_ZERO) &&
+ (ret & BDRV_BLOCK_OFFSET_VALID)) {
+ ret2 = bdrv_co_get_block_status(bs->file, ret >> BDRV_SECTOR_BITS,
+ *pnum, pnum);
+ if (ret2 >= 0) {
+ /* Ignore errors. This is just providing extra information, it
+ * is useful but not necessary.
+ */
+ ret |= (ret2 & BDRV_BLOCK_ZERO);
+ }
+ }
+
return ret;
}
--
1.8.3.1
^ permalink raw reply related [flat|nested] 56+ messages in thread
* [Qemu-devel] [PULL 40/42] dataplane: Fix startup race.
2013-09-06 15:38 [Qemu-devel] [PULL 00/42] Block patches Stefan Hajnoczi
` (38 preceding siblings ...)
2013-09-06 15:39 ` [Qemu-devel] [PULL 39/42] block: look for zero blocks in bs->file Stefan Hajnoczi
@ 2013-09-06 15:39 ` Stefan Hajnoczi
2013-09-06 15:39 ` [Qemu-devel] [PULL 41/42] qemu-iotests: Whitespace cleanup Stefan Hajnoczi
2013-09-06 15:39 ` [Qemu-devel] [PULL 42/42] qemu-iotests: Fixed test case 026 Stefan Hajnoczi
41 siblings, 0 replies; 56+ messages in thread
From: Stefan Hajnoczi @ 2013-09-06 15:39 UTC (permalink / raw)
To: qemu-devel; +Cc: Cornelia Huck, Stefan Hajnoczi, Anthony Liguori
From: Cornelia Huck <cornelia.huck@de.ibm.com>
Avoid trying to setup dataplane again if dataplane setup is already in
progress. This may happen if an eventfd is triggered during setup.
I saw this occasionally with an experimental s390 irqfd implementation:
virtio_blk_handle_output
-> virtio_blk_data_plane_start
-> virtio_ccw_set_host_notifier
...
-> virtio_queue_set_host_notifier_fd_handler
-> virtio_queue_host_notifier_read
-> virtio_queue_notify_vq
-> virtio_blk_handle_output
-> virtio_blk_data_plane_start
-> vring_setup
-> hostmem_init
-> memory_listener_register
-> BOOM
As virtio-ccw tries to follow what virtio-pci does, it might be triggerable
for other platforms as well.
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
hw/block/dataplane/virtio-blk.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/hw/block/dataplane/virtio-blk.c b/hw/block/dataplane/virtio-blk.c
index 5a96ccd..f2d7350 100644
--- a/hw/block/dataplane/virtio-blk.c
+++ b/hw/block/dataplane/virtio-blk.c
@@ -42,6 +42,7 @@ typedef struct {
struct VirtIOBlockDataPlane {
bool started;
+ bool starting;
bool stopping;
QEMUBH *start_bh;
QemuThread thread;
@@ -451,8 +452,15 @@ void virtio_blk_data_plane_start(VirtIOBlockDataPlane *s)
return;
}
+ if (s->starting) {
+ return;
+ }
+
+ s->starting = true;
+
vq = virtio_get_queue(s->vdev, 0);
if (!vring_setup(&s->vring, s->vdev, 0)) {
+ s->starting = false;
return;
}
@@ -482,6 +490,7 @@ void virtio_blk_data_plane_start(VirtIOBlockDataPlane *s)
s->io_notifier = *ioq_get_notifier(&s->ioqueue);
aio_set_event_notifier(s->ctx, &s->io_notifier, handle_io);
+ s->starting = false;
s->started = true;
trace_virtio_blk_data_plane_start(s);
--
1.8.3.1
^ permalink raw reply related [flat|nested] 56+ messages in thread
* [Qemu-devel] [PULL 41/42] qemu-iotests: Whitespace cleanup
2013-09-06 15:38 [Qemu-devel] [PULL 00/42] Block patches Stefan Hajnoczi
` (39 preceding siblings ...)
2013-09-06 15:39 ` [Qemu-devel] [PULL 40/42] dataplane: Fix startup race Stefan Hajnoczi
@ 2013-09-06 15:39 ` Stefan Hajnoczi
2013-09-06 15:39 ` [Qemu-devel] [PULL 42/42] qemu-iotests: Fixed test case 026 Stefan Hajnoczi
41 siblings, 0 replies; 56+ messages in thread
From: Stefan Hajnoczi @ 2013-09-06 15:39 UTC (permalink / raw)
To: qemu-devel; +Cc: Kevin Wolf, Stefan Hajnoczi, Anthony Liguori
From: Kevin Wolf <kwolf@redhat.com>
These scripts used to have a four characters indentation, with eight
consecutive spaces converted into a tab. Convert everything into spaces.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
tests/qemu-iotests/check | 234 ++++++++++-----------
tests/qemu-iotests/common | 422 +++++++++++++++++++-------------------
tests/qemu-iotests/common.config | 6 +-
tests/qemu-iotests/common.filter | 42 ++--
tests/qemu-iotests/common.pattern | 4 +-
tests/qemu-iotests/common.rc | 92 ++++-----
6 files changed, 400 insertions(+), 400 deletions(-)
diff --git a/tests/qemu-iotests/check b/tests/qemu-iotests/check
index 74628ae..e51bae8 100755
--- a/tests/qemu-iotests/check
+++ b/tests/qemu-iotests/check
@@ -78,50 +78,50 @@ _wrapup()
if $showme
then
- :
+ :
elif $needwrap
then
- if [ -f check.time -a -f $tmp.time ]
- then
- cat check.time $tmp.time \
- | $AWK_PROG '
- { t[$1] = $2 }
-END { if (NR > 0) {
- for (i in t) print i " " t[i]
- }
- }' \
- | sort -n >$tmp.out
- mv $tmp.out check.time
- fi
-
- if [ -f $tmp.expunged ]
- then
- notrun=`wc -l <$tmp.expunged | sed -e 's/ *//g'`
- try=`expr $try - $notrun`
- list=`echo "$list" | sed -f $tmp.expunged`
- fi
-
- echo "" >>check.log
- date >>check.log
- echo $list | fmt | sed -e 's/^/ /' >>check.log
- $interrupt && echo "Interrupted!" >>check.log
-
- if [ ! -z "$notrun" ]
- then
- echo "Not run:$notrun"
- echo "Not run:$notrun" >>check.log
- fi
+ if [ -f check.time -a -f $tmp.time ]
+ then
+ cat check.time $tmp.time \
+ | $AWK_PROG '
+ { t[$1] = $2 }
+END { if (NR > 0) {
+ for (i in t) print i " " t[i]
+ }
+ }' \
+ | sort -n >$tmp.out
+ mv $tmp.out check.time
+ fi
+
+ if [ -f $tmp.expunged ]
+ then
+ notrun=`wc -l <$tmp.expunged | sed -e 's/ *//g'`
+ try=`expr $try - $notrun`
+ list=`echo "$list" | sed -f $tmp.expunged`
+ fi
+
+ echo "" >>check.log
+ date >>check.log
+ echo $list | fmt | sed -e 's/^/ /' >>check.log
+ $interrupt && echo "Interrupted!" >>check.log
+
+ if [ ! -z "$notrun" ]
+ then
+ echo "Not run:$notrun"
+ echo "Not run:$notrun" >>check.log
+ fi
if [ ! -z "$n_bad" -a $n_bad != 0 ]
- then
- echo "Failures:$bad"
- echo "Failed $n_bad of $try tests"
- echo "Failures:$bad" | fmt >>check.log
- echo "Failed $n_bad of $try tests" >>check.log
- else
- echo "Passed all $try tests"
- echo "Passed all $try tests" >>check.log
- fi
- needwrap=false
+ then
+ echo "Failures:$bad"
+ echo "Failed $n_bad of $try tests"
+ echo "Failures:$bad" | fmt >>check.log
+ echo "Failed $n_bad of $try tests" >>check.log
+ else
+ echo "Passed all $try tests"
+ echo "Passed all $try tests" >>check.log
+ fi
+ needwrap=false
fi
rm -f /tmp/*.out /tmp/*.err /tmp/*.time
@@ -185,82 +185,82 @@ do
if $showme
then
- echo
- continue
- elif [ -f expunged ] && $expunge && egrep "^$seq([ ]|\$)" expunged >/dev/null
+ echo
+ continue
+ elif [ -f expunged ] && $expunge && egrep "^$seq([ ]|\$)" expunged >/dev/null
then
- echo " - expunged"
- rm -f $seq.out.bad
- echo "/^$seq\$/d" >>$tmp.expunged
+ echo " - expunged"
+ rm -f $seq.out.bad
+ echo "/^$seq\$/d" >>$tmp.expunged
elif [ ! -f $seq ]
then
- echo " - no such test?"
- echo "/^$seq\$/d" >>$tmp.expunged
+ echo " - no such test?"
+ echo "/^$seq\$/d" >>$tmp.expunged
else
- # really going to try and run this one
- #
- rm -f $seq.out.bad
- lasttime=`sed -n -e "/^$seq /s/.* //p" <check.time`
- if [ "X$lasttime" != X ]; then
- echo -n " ${lasttime}s ..."
- else
- echo -n " " # prettier output with timestamps.
- fi
- rm -f core $seq.notrun
-
- # for hangcheck ...
- echo "$seq" >/tmp/check.sts
-
- start=`_wallclock`
- $timestamp && echo -n " ["`date "+%T"`"]"
- [ ! -x $seq ] && chmod u+x $seq # ensure we can run it
- MALLOC_PERTURB_=${MALLOC_PERTURB_:-$(($RANDOM % 255 + 1))} \
- ./$seq >$tmp.out 2>&1
- sts=$?
- $timestamp && _timestamp
- stop=`_wallclock`
-
- if [ -f core ]
- then
- echo -n " [dumped core]"
- mv core $seq.core
- err=true
- fi
-
- if [ -f $seq.notrun ]
- then
- $timestamp || echo -n " [not run] "
- $timestamp && echo " [not run]" && echo -n " $seq -- "
- cat $seq.notrun
- notrun="$notrun $seq"
- else
- if [ $sts -ne 0 ]
- then
- echo -n " [failed, exit status $sts]"
- err=true
- fi
- if [ ! -f $seq.out ]
- then
- echo " - no qualified output"
- err=true
- else
- if diff -w $seq.out $tmp.out >/dev/null 2>&1
- then
- echo ""
- if $err
- then
- :
- else
- echo "$seq `expr $stop - $start`" >>$tmp.time
- fi
- else
- echo " - output mismatch (see $seq.out.bad)"
- mv $tmp.out $seq.out.bad
- $diff -w $seq.out $seq.out.bad
- err=true
- fi
- fi
- fi
+ # really going to try and run this one
+ #
+ rm -f $seq.out.bad
+ lasttime=`sed -n -e "/^$seq /s/.* //p" <check.time`
+ if [ "X$lasttime" != X ]; then
+ echo -n " ${lasttime}s ..."
+ else
+ echo -n " " # prettier output with timestamps.
+ fi
+ rm -f core $seq.notrun
+
+ # for hangcheck ...
+ echo "$seq" >/tmp/check.sts
+
+ start=`_wallclock`
+ $timestamp && echo -n " ["`date "+%T"`"]"
+ [ ! -x $seq ] && chmod u+x $seq # ensure we can run it
+ MALLOC_PERTURB_=${MALLOC_PERTURB_:-$(($RANDOM % 255 + 1))} \
+ ./$seq >$tmp.out 2>&1
+ sts=$?
+ $timestamp && _timestamp
+ stop=`_wallclock`
+
+ if [ -f core ]
+ then
+ echo -n " [dumped core]"
+ mv core $seq.core
+ err=true
+ fi
+
+ if [ -f $seq.notrun ]
+ then
+ $timestamp || echo -n " [not run] "
+ $timestamp && echo " [not run]" && echo -n " $seq -- "
+ cat $seq.notrun
+ notrun="$notrun $seq"
+ else
+ if [ $sts -ne 0 ]
+ then
+ echo -n " [failed, exit status $sts]"
+ err=true
+ fi
+ if [ ! -f $seq.out ]
+ then
+ echo " - no qualified output"
+ err=true
+ else
+ if diff -w $seq.out $tmp.out >/dev/null 2>&1
+ then
+ echo ""
+ if $err
+ then
+ :
+ else
+ echo "$seq `expr $stop - $start`" >>$tmp.time
+ fi
+ else
+ echo " - output mismatch (see $seq.out.bad)"
+ mv $tmp.out $seq.out.bad
+ $diff -w $seq.out $seq.out.bad
+ err=true
+ fi
+ fi
+ fi
fi
@@ -268,12 +268,12 @@ do
#
if $err
then
- bad="$bad $seq"
- n_bad=`expr $n_bad + 1`
- quick=false
+ bad="$bad $seq"
+ n_bad=`expr $n_bad + 1`
+ quick=false
fi
[ -f $seq.notrun ] || try=`expr $try + 1`
-
+
seq="after_$seq"
done
diff --git a/tests/qemu-iotests/common b/tests/qemu-iotests/common
index 6826ea7..fecaf85 100644
--- a/tests/qemu-iotests/common
+++ b/tests/qemu-iotests/common
@@ -54,58 +54,58 @@ do
if $group
then
- # arg after -g
- group_list=`sed -n <group -e 's/$/ /' -e "/^[0-9][0-9][0-9].* $r /"'{
+ # arg after -g
+ group_list=`sed -n <group -e 's/$/ /' -e "/^[0-9][0-9][0-9].* $r /"'{
s/ .*//p
}'`
- if [ -z "$group_list" ]
- then
- echo "Group \"$r\" is empty or not defined?"
- exit 1
- fi
- [ ! -s $tmp.list ] && touch $tmp.list
- for t in $group_list
- do
- if grep -s "^$t\$" $tmp.list >/dev/null
- then
- :
- else
- echo "$t" >>$tmp.list
- fi
- done
- group=false
- continue
+ if [ -z "$group_list" ]
+ then
+ echo "Group \"$r\" is empty or not defined?"
+ exit 1
+ fi
+ [ ! -s $tmp.list ] && touch $tmp.list
+ for t in $group_list
+ do
+ if grep -s "^$t\$" $tmp.list >/dev/null
+ then
+ :
+ else
+ echo "$t" >>$tmp.list
+ fi
+ done
+ group=false
+ continue
elif $xgroup
then
- # arg after -x
- [ ! -s $tmp.list ] && ls [0-9][0-9][0-9] [0-9][0-9][0-9][0-9] >$tmp.list 2>/dev/null
- group_list=`sed -n <group -e 's/$/ /' -e "/^[0-9][0-9][0-9].* $r /"'{
+ # arg after -x
+ [ ! -s $tmp.list ] && ls [0-9][0-9][0-9] [0-9][0-9][0-9][0-9] >$tmp.list 2>/dev/null
+ group_list=`sed -n <group -e 's/$/ /' -e "/^[0-9][0-9][0-9].* $r /"'{
s/ .*//p
}'`
- if [ -z "$group_list" ]
- then
- echo "Group \"$r\" is empty or not defined?"
- exit 1
- fi
- numsed=0
- rm -f $tmp.sed
- for t in $group_list
- do
- if [ $numsed -gt 100 ]
- then
- sed -f $tmp.sed <$tmp.list >$tmp.tmp
- mv $tmp.tmp $tmp.list
- numsed=0
- rm -f $tmp.sed
- fi
- echo "/^$t\$/d" >>$tmp.sed
- numsed=`expr $numsed + 1`
- done
- sed -f $tmp.sed <$tmp.list >$tmp.tmp
- mv $tmp.tmp $tmp.list
- xgroup=false
- continue
+ if [ -z "$group_list" ]
+ then
+ echo "Group \"$r\" is empty or not defined?"
+ exit 1
+ fi
+ numsed=0
+ rm -f $tmp.sed
+ for t in $group_list
+ do
+ if [ $numsed -gt 100 ]
+ then
+ sed -f $tmp.sed <$tmp.list >$tmp.tmp
+ mv $tmp.tmp $tmp.list
+ numsed=0
+ rm -f $tmp.sed
+ fi
+ echo "/^$t\$/d" >>$tmp.sed
+ numsed=`expr $numsed + 1`
+ done
+ sed -f $tmp.sed <$tmp.list >$tmp.tmp
+ mv $tmp.tmp $tmp.list
+ xgroup=false
+ continue
elif $imgopts
then
@@ -119,11 +119,11 @@ s/ .*//p
case "$r"
in
- -\? | -h | --help) # usage
- echo "Usage: $0 [options] [testlist]"'
+ -\? | -h | --help) # usage
+ echo "Usage: $0 [options] [testlist]"'
common options
- -v verbose
+ -v verbose
check options
-raw test raw (default)
@@ -138,162 +138,162 @@ check options
-sheepdog test sheepdog
-nbd test nbd
-ssh test ssh
- -xdiff graphical mode diff
- -nocache use O_DIRECT on backing file
- -misalign misalign memory allocations
- -n show me, do not run tests
+ -xdiff graphical mode diff
+ -nocache use O_DIRECT on backing file
+ -misalign misalign memory allocations
+ -n show me, do not run tests
-o options -o options to pass to qemu-img create/convert
- -T output timestamps
- -r randomize test order
-
+ -T output timestamps
+ -r randomize test order
+
testlist options
- -g group[,group...] include tests from these groups
- -x group[,group...] exclude tests from these groups
- NNN include test NNN
- NNN-NNN include test range (eg. 012-021)
+ -g group[,group...] include tests from these groups
+ -x group[,group...] exclude tests from these groups
+ NNN include test NNN
+ NNN-NNN include test range (eg. 012-021)
'
- exit 0
- ;;
-
- -raw)
- IMGFMT=raw
- xpand=false
- ;;
-
- -cow)
- IMGFMT=cow
- xpand=false
- ;;
-
- -qcow)
- IMGFMT=qcow
- xpand=false
- ;;
-
- -qcow2)
- IMGFMT=qcow2
- xpand=false
- ;;
-
- -qed)
- IMGFMT=qed
- xpand=false
- ;;
-
- -vdi)
- IMGFMT=vdi
- xpand=false
- ;;
-
- -vmdk)
- IMGFMT=vmdk
- xpand=false
- ;;
-
- -vpc)
- IMGFMT=vpc
- xpand=false
- ;;
-
- -rbd)
- IMGPROTO=rbd
- xpand=false
- ;;
- -sheepdog)
- IMGPROTO=sheepdog
- xpand=false
- ;;
- -nbd)
- IMGPROTO=nbd
- xpand=false
- ;;
+ exit 0
+ ;;
+
+ -raw)
+ IMGFMT=raw
+ xpand=false
+ ;;
+
+ -cow)
+ IMGFMT=cow
+ xpand=false
+ ;;
+
+ -qcow)
+ IMGFMT=qcow
+ xpand=false
+ ;;
+
+ -qcow2)
+ IMGFMT=qcow2
+ xpand=false
+ ;;
+
+ -qed)
+ IMGFMT=qed
+ xpand=false
+ ;;
+
+ -vdi)
+ IMGFMT=vdi
+ xpand=false
+ ;;
+
+ -vmdk)
+ IMGFMT=vmdk
+ xpand=false
+ ;;
+
+ -vpc)
+ IMGFMT=vpc
+ xpand=false
+ ;;
+
+ -rbd)
+ IMGPROTO=rbd
+ xpand=false
+ ;;
+ -sheepdog)
+ IMGPROTO=sheepdog
+ xpand=false
+ ;;
+ -nbd)
+ IMGPROTO=nbd
+ xpand=false
+ ;;
-ssh)
IMGPROTO=ssh
xpand=false
;;
- -nocache)
- QEMU_IO_OPTIONS="$QEMU_IO_OPTIONS --nocache"
- xpand=false
- ;;
+ -nocache)
+ QEMU_IO_OPTIONS="$QEMU_IO_OPTIONS --nocache"
+ xpand=false
+ ;;
- -misalign)
- QEMU_IO_OPTIONS="$QEMU_IO_OPTIONS --misalign"
- xpand=false
- ;;
+ -misalign)
+ QEMU_IO_OPTIONS="$QEMU_IO_OPTIONS --misalign"
+ xpand=false
+ ;;
-valgrind)
valgrind=true
- xpand=false
+ xpand=false
;;
- -g) # -g group ... pick from group file
- group=true
- xpand=false
- ;;
-
- -xdiff) # graphical diff mode
- xpand=false
-
- if [ ! -z "$DISPLAY" ]
- then
- which xdiff >/dev/null 2>&1 && diff=xdiff
- which gdiff >/dev/null 2>&1 && diff=gdiff
- which tkdiff >/dev/null 2>&1 && diff=tkdiff
- which xxdiff >/dev/null 2>&1 && diff=xxdiff
- fi
- ;;
-
- -n) # show me, don't do it
- showme=true
- xpand=false
- ;;
+ -g) # -g group ... pick from group file
+ group=true
+ xpand=false
+ ;;
+
+ -xdiff) # graphical diff mode
+ xpand=false
+
+ if [ ! -z "$DISPLAY" ]
+ then
+ which xdiff >/dev/null 2>&1 && diff=xdiff
+ which gdiff >/dev/null 2>&1 && diff=gdiff
+ which tkdiff >/dev/null 2>&1 && diff=tkdiff
+ which xxdiff >/dev/null 2>&1 && diff=xxdiff
+ fi
+ ;;
+
+ -n) # show me, don't do it
+ showme=true
+ xpand=false
+ ;;
-o)
imgopts=true
xpand=false
;;
- -r) # randomize test order
- randomize=true
- xpand=false
- ;;
-
- -T) # turn on timestamp output
- timestamp=true
- xpand=false
- ;;
-
- -v)
- verbose=true
- xpand=false
- ;;
- -x) # -x group ... exclude from group file
- xgroup=true
- xpand=false
- ;;
- '[0-9][0-9][0-9] [0-9][0-9][0-9][0-9]')
- echo "No tests?"
- status=1
- exit $status
- ;;
-
- [0-9]*-[0-9]*)
- eval `echo $r | sed -e 's/^/start=/' -e 's/-/ end=/'`
- ;;
-
- [0-9]*-)
- eval `echo $r | sed -e 's/^/start=/' -e 's/-//'`
- end=`echo [0-9][0-9][0-9] [0-9][0-9][0-9][0-9] | sed -e 's/\[0-9]//g' -e 's/ *$//' -e 's/.* //'`
- if [ -z "$end" ]
- then
- echo "No tests in range \"$r\"?"
- status=1
- exit $status
- fi
- ;;
-
- *)
- start=$r
- end=$r
- ;;
+ -r) # randomize test order
+ randomize=true
+ xpand=false
+ ;;
+
+ -T) # turn on timestamp output
+ timestamp=true
+ xpand=false
+ ;;
+
+ -v)
+ verbose=true
+ xpand=false
+ ;;
+ -x) # -x group ... exclude from group file
+ xgroup=true
+ xpand=false
+ ;;
+ '[0-9][0-9][0-9] [0-9][0-9][0-9][0-9]')
+ echo "No tests?"
+ status=1
+ exit $status
+ ;;
+
+ [0-9]*-[0-9]*)
+ eval `echo $r | sed -e 's/^/start=/' -e 's/-/ end=/'`
+ ;;
+
+ [0-9]*-)
+ eval `echo $r | sed -e 's/^/start=/' -e 's/-//'`
+ end=`echo [0-9][0-9][0-9] [0-9][0-9][0-9][0-9] | sed -e 's/\[0-9]//g' -e 's/ *$//' -e 's/.* //'`
+ if [ -z "$end" ]
+ then
+ echo "No tests in range \"$r\"?"
+ status=1
+ exit $status
+ fi
+ ;;
+
+ *)
+ start=$r
+ end=$r
+ ;;
esac
@@ -303,26 +303,26 @@ testlist options
if $xpand
then
- have_test_arg=true
- $AWK_PROG </dev/null '
-BEGIN { for (t='$start'; t<='$end'; t++) printf "%03d\n",t }' \
- | while read id
- do
- if grep -s "^$id " group >/dev/null
- then
- # in group file ... OK
- echo $id >>$tmp.list
- else
- if [ -f expunged ] && $expunge && egrep "^$id([ ]|\$)" expunged >/dev/null
- then
- # expunged ... will be reported, but not run, later
- echo $id >>$tmp.list
- else
- # oops
- echo "$id - unknown test, ignored"
- fi
- fi
- done
+ have_test_arg=true
+ $AWK_PROG </dev/null '
+BEGIN { for (t='$start'; t<='$end'; t++) printf "%03d\n",t }' \
+ | while read id
+ do
+ if grep -s "^$id " group >/dev/null
+ then
+ # in group file ... OK
+ echo $id >>$tmp.list
+ else
+ if [ -f expunged ] && $expunge && egrep "^$id([ ]|\$)" expunged >/dev/null
+ then
+ # expunged ... will be reported, but not run, later
+ echo $id >>$tmp.list
+ else
+ # oops
+ echo "$id - unknown test, ignored"
+ fi
+ fi
+ done
fi
done
@@ -337,11 +337,11 @@ then
else
if $have_test_arg
then
- # had test numbers, but none in group file ... do nothing
- touch $tmp.list
+ # had test numbers, but none in group file ... do nothing
+ touch $tmp.list
else
- # no test numbers, do everything from group file
- sed -n -e '/^[0-9][0-9][0-9]*/s/[ ].*//p' <group >$tmp.list
+ # no test numbers, do everything from group file
+ sed -n -e '/^[0-9][0-9][0-9]*/s/[ ].*//p' <group >$tmp.list
fi
fi
diff --git a/tests/qemu-iotests/common.config b/tests/qemu-iotests/common.config
index 08a3f10..d794e62 100644
--- a/tests/qemu-iotests/common.config
+++ b/tests/qemu-iotests/common.config
@@ -19,7 +19,7 @@
# setup and check for config parameters, and in particular
#
# EMAIL - email of the script runner.
-# TEST_DIR - scratch test directory
+# TEST_DIR - scratch test directory
#
# - These can be added to $HOST_CONFIG_DIR (witch default to ./config)
# below or a separate local configuration file can be used (using
@@ -111,11 +111,11 @@ export QEMU_NBD=$QEMU_NBD_PROG
[ -f /etc/qemu-iotest.config ] && . /etc/qemu-iotest.config
if [ -z "$TEST_DIR" ]; then
- TEST_DIR=`pwd`/scratch
+ TEST_DIR=`pwd`/scratch
fi
if [ ! -e "$TEST_DIR" ]; then
- mkdir "$TEST_DIR"
+ mkdir "$TEST_DIR"
fi
if [ ! -d "$TEST_DIR" ]; then
diff --git a/tests/qemu-iotests/common.filter b/tests/qemu-iotests/common.filter
index 97a31ff..5dfda63 100644
--- a/tests/qemu-iotests/common.filter
+++ b/tests/qemu-iotests/common.filter
@@ -25,19 +25,19 @@
# Outputs suitable message to stdout if it's not in range.
#
# A verbose option, -v, may be used as the LAST argument
-#
-# e.g.
+#
+# e.g.
# foo: 0.0298 = 0.03 +/- 5%
-# _within_tolerance "foo" 0.0298 0.03 5%
-#
+# _within_tolerance "foo" 0.0298 0.03 5%
+#
# foo: 0.0298 = 0.03 +/- 0.01
# _within_tolerance "foo" 0.0298 0.03 0.01
#
# foo: 0.0298 = 0.03 -0.01 +0.002
# _within_tolerance "foo" 0.0298 0.03 0.01 0.002
#
-# foo: verbose output of 0.0298 = 0.03 +/- 5%
-# _within_tolerance "foo" 0.0298 0.03 5% -v
+# foo: verbose output of 0.0298 = 0.03 +/- 5%
+# _within_tolerance "foo" 0.0298 0.03 5% -v
_within_tolerance()
{
_name=$1
@@ -51,10 +51,10 @@ _within_tolerance()
# maxtol arg is optional
# verbose arg is optional
if [ $# -ge 5 ]
- then
+ then
if [ "$5" = "-v" ]
then
- _verbose=1
+ _verbose=1
else
_maxtol=$5
fi
@@ -65,18 +65,18 @@ _within_tolerance()
fi
# find min with or without %
- _mintolerance=`echo $_mintol | sed -e 's/%//'`
+ _mintolerance=`echo $_mintol | sed -e 's/%//'`
if [ $_mintol = $_mintolerance ]
- then
+ then
_min=`echo "scale=5; $_correct_val-$_mintolerance" | bc`
else
_min=`echo "scale=5; $_correct_val-$_mintolerance*0.01*$_correct_val" | bc`
fi
# find max with or without %
- _maxtolerance=`echo $_maxtol | sed -e 's/%//'`
+ _maxtolerance=`echo $_maxtol | sed -e 's/%//'`
if [ $_maxtol = $_maxtolerance ]
- then
+ then
_max=`echo "scale=5; $_correct_val+$_maxtolerance" | bc`
else
_max=`echo "scale=5; $_correct_val+$_maxtolerance*0.01*$_correct_val" | bc`
@@ -88,7 +88,7 @@ _within_tolerance()
cat <<EOF >$tmp.bc.1
scale=5;
if ($_min <= $_given_val) 1;
-if ($_min > $_given_val) 0;
+if ($_min > $_given_val) 0;
EOF
cat <<EOF >$tmp.bc.2
@@ -102,21 +102,21 @@ EOF
rm -f $tmp.bc.[12]
- _in_range=`expr $_above_min \& $_below_max`
+ _in_range=`expr $_above_min \& $_below_max`
# fix up min, max precision for output
# can vary for 5.3, 6.2
_min=`echo $_min | sed -e 's/0*$//'` # get rid of trailling zeroes
_max=`echo $_max | sed -e 's/0*$//'` # get rid of trailling zeroes
- if [ $_in_range -eq 1 ]
+ if [ $_in_range -eq 1 ]
then
- [ $_verbose -eq 1 ] && echo $_name is in range
- return 0
+ [ $_verbose -eq 1 ] && echo $_name is in range
+ return 0
else
- [ $_verbose -eq 1 ] && echo $_name has value of $_given_val
- [ $_verbose -eq 1 ] && echo $_name is NOT in range $_min .. $_max
- return 1
+ [ $_verbose -eq 1 ] && echo $_name has value of $_given_val
+ [ $_verbose -eq 1 ] && echo $_name is NOT in range $_min .. $_max
+ return 1
fi
}
@@ -125,7 +125,7 @@ EOF
_filter_date()
{
sed \
- -e 's/[A-Z][a-z][a-z] [A-z][a-z][a-z] *[0-9][0-9]* [0-9][0-9]:[0-9][0-9]:[0-9][0-9] [0-9][0-9][0-9][0-9]$/DATE/'
+ -e 's/[A-Z][a-z][a-z] [A-z][a-z][a-z] *[0-9][0-9]* [0-9][0-9]:[0-9][0-9]:[0-9][0-9] [0-9][0-9][0-9][0-9]$/DATE/'
}
# replace occurrences of the actual TEST_DIR value with TEST_DIR
diff --git a/tests/qemu-iotests/common.pattern b/tests/qemu-iotests/common.pattern
index 85a40ee..00e0f60 100644
--- a/tests/qemu-iotests/common.pattern
+++ b/tests/qemu-iotests/common.pattern
@@ -106,8 +106,8 @@ function io_test2() {
local num=$3
# Pattern (repeat after 9 clusters):
- # used - used - free - used - compressed - compressed -
- # free - free - compressed
+ # used - used - free - used - compressed - compressed -
+ # free - free - compressed
# Write the clusters to be compressed
echo === Clusters to be compressed [1]
diff --git a/tests/qemu-iotests/common.rc b/tests/qemu-iotests/common.rc
index 5e077c3..88fecf7 100644
--- a/tests/qemu-iotests/common.rc
+++ b/tests/qemu-iotests/common.rc
@@ -20,17 +20,17 @@
dd()
{
if [ "$HOSTOS" == "Linux" ]
- then
- command dd --help | grep noxfer > /dev/null 2>&1
-
- if [ "$?" -eq 0 ]
- then
- command dd status=noxfer $@
- else
- command dd $@
- fi
+ then
+ command dd --help | grep noxfer > /dev/null 2>&1
+
+ if [ "$?" -eq 0 ]
+ then
+ command dd status=noxfer $@
+ else
+ command dd $@
+ fi
else
- command dd $@
+ command dd $@
fi
}
@@ -193,8 +193,8 @@ _get_pids_by_name()
{
if [ $# -ne 1 ]
then
- echo "Usage: _get_pids_by_name process-name" 1>&2
- exit 1
+ echo "Usage: _get_pids_by_name process-name" 1>&2
+ exit 1
fi
# Algorithm ... all ps(1) variants have a time of the form MM:SS or
@@ -206,12 +206,12 @@ _get_pids_by_name()
ps $PS_ALL_FLAGS \
| sed -n \
- -e 's/$/ /' \
- -e 's/[ ][ ]*/ /g' \
- -e 's/^ //' \
- -e 's/^[^ ]* //' \
- -e "/[0-9]:[0-9][0-9] *[^ ]*\/$1 /s/ .*//p" \
- -e "/[0-9]:[0-9][0-9] *$1 /s/ .*//p"
+ -e 's/$/ /' \
+ -e 's/[ ][ ]*/ /g' \
+ -e 's/^ //' \
+ -e 's/^[^ ]* //' \
+ -e "/[0-9]:[0-9][0-9] *[^ ]*\/$1 /s/ .*//p" \
+ -e "/[0-9]:[0-9][0-9] *$1 /s/ .*//p"
}
# fqdn for localhost
@@ -229,8 +229,8 @@ _need_to_be_root()
id=`id | $SED_PROG -e 's/(.*//' -e 's/.*=//'`
if [ "$id" -ne 0 ]
then
- echo "Arrgh ... you need to be root (not uid=$id) to run this test"
- exit 1
+ echo "Arrgh ... you need to be root (not uid=$id) to run this test"
+ exit 1
fi
}
@@ -248,33 +248,33 @@ _need_to_be_root()
_do()
{
if [ $# -eq 1 ]; then
- _cmd=$1
+ _cmd=$1
elif [ $# -eq 2 ]; then
- _note=$1
- _cmd=$2
- echo -n "$_note... "
+ _note=$1
+ _cmd=$2
+ echo -n "$_note... "
else
- echo "Usage: _do [note] cmd" 1>&2
- status=1; exit
+ echo "Usage: _do [note] cmd" 1>&2
+ status=1; exit
fi
(eval "echo '---' \"$_cmd\"") >>$here/$seq.full
(eval "$_cmd") >$tmp._out 2>&1; ret=$?
cat $tmp._out >>$here/$seq.full
if [ $# -eq 2 ]; then
- if [ $ret -eq 0 ]; then
- echo "done"
- else
- echo "fail"
- fi
+ if [ $ret -eq 0 ]; then
+ echo "done"
+ else
+ echo "fail"
+ fi
fi
if [ $ret -ne 0 ] \
- && [ "$_do_die_on_error" = "always" \
- -o \( $# -eq 2 -a "$_do_die_on_error" = "message_only" \) ]
+ && [ "$_do_die_on_error" = "always" \
+ -o \( $# -eq 2 -a "$_do_die_on_error" = "message_only" \) ]
then
- [ $# -ne 2 ] && echo
- eval "echo \"$_cmd\" failed \(returned $ret\): see $seq.full"
- status=1; exit
+ [ $# -ne 2 ] && echo
+ eval "echo \"$_cmd\" failed \(returned $ret\): see $seq.full"
+ status=1; exit
fi
return $ret
@@ -305,9 +305,9 @@ _fail()
_supported_fmt()
{
for f; do
- if [ "$f" = "$IMGFMT" -o "$f" = "generic" ]; then
- return
- fi
+ if [ "$f" = "$IMGFMT" -o "$f" = "generic" ]; then
+ return
+ fi
done
_notrun "not suitable for this image format: $IMGFMT"
@@ -318,9 +318,9 @@ _supported_fmt()
_supported_proto()
{
for f; do
- if [ "$f" = "$IMGPROTO" -o "$f" = "generic" ]; then
- return
- fi
+ if [ "$f" = "$IMGPROTO" -o "$f" = "generic" ]; then
+ return
+ fi
done
_notrun "not suitable for this image protocol: $IMGPROTO"
@@ -332,10 +332,10 @@ _supported_os()
{
for h
do
- if [ "$h" = "$HOSTOS" ]
- then
- return
- fi
+ if [ "$h" = "$HOSTOS" ]
+ then
+ return
+ fi
done
_notrun "not suitable for this OS: $HOSTOS"
--
1.8.3.1
^ permalink raw reply related [flat|nested] 56+ messages in thread
* [Qemu-devel] [PULL 42/42] qemu-iotests: Fixed test case 026
2013-09-06 15:38 [Qemu-devel] [PULL 00/42] Block patches Stefan Hajnoczi
` (40 preceding siblings ...)
2013-09-06 15:39 ` [Qemu-devel] [PULL 41/42] qemu-iotests: Whitespace cleanup Stefan Hajnoczi
@ 2013-09-06 15:39 ` Stefan Hajnoczi
41 siblings, 0 replies; 56+ messages in thread
From: Stefan Hajnoczi @ 2013-09-06 15:39 UTC (permalink / raw)
To: qemu-devel; +Cc: Kevin Wolf, Stefan Hajnoczi, Anthony Liguori
From: Kevin Wolf <kwolf@redhat.com>
The reference output for test case 026 hasn't been updated in a long
time and it's one of the "known failing" cases. This patch updates the
reference output so that unintentional changes can be reliably detected
again.
The problem with this test case is that it produces different output
depending on whether -nocache is used or not. The solution of this patch
is to actually have two different reference outputs. If nnn.out.nocache
exists, it is used as the reference output for -nocache; otherwise,
nnn.out stays valid for both cases.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
tests/qemu-iotests/026.out | 28 +-
tests/qemu-iotests/026.out.nocache | 626 +++++++++++++++++++++++++++++++++++++
tests/qemu-iotests/check | 12 +-
3 files changed, 649 insertions(+), 17 deletions(-)
create mode 100644 tests/qemu-iotests/026.out.nocache
diff --git a/tests/qemu-iotests/026.out b/tests/qemu-iotests/026.out
index fb4f20e..0764389 100644
--- a/tests/qemu-iotests/026.out
+++ b/tests/qemu-iotests/026.out
@@ -126,62 +126,64 @@ Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
Event: l2_update; errno: 5; imm: off; once: on; write
write failed: Input/output error
-128 leaked clusters were found on the image.
+127 leaked clusters were found on the image.
This means waste of disk space, but no harm to data.
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
Event: l2_update; errno: 5; imm: off; once: on; write -b
write failed: Input/output error
-128 leaked clusters were found on the image.
+127 leaked clusters were found on the image.
This means waste of disk space, but no harm to data.
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
Event: l2_update; errno: 5; imm: off; once: off; write
write failed: Input/output error
-128 leaked clusters were found on the image.
+127 leaked clusters were found on the image.
This means waste of disk space, but no harm to data.
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
Event: l2_update; errno: 5; imm: off; once: off; write -b
write failed: Input/output error
-128 leaked clusters were found on the image.
+127 leaked clusters were found on the image.
This means waste of disk space, but no harm to data.
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
Event: l2_update; errno: 28; imm: off; once: on; write
write failed: No space left on device
-128 leaked clusters were found on the image.
+127 leaked clusters were found on the image.
This means waste of disk space, but no harm to data.
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
Event: l2_update; errno: 28; imm: off; once: on; write -b
write failed: No space left on device
-128 leaked clusters were found on the image.
+127 leaked clusters were found on the image.
This means waste of disk space, but no harm to data.
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
Event: l2_update; errno: 28; imm: off; once: off; write
write failed: No space left on device
-128 leaked clusters were found on the image.
+127 leaked clusters were found on the image.
This means waste of disk space, but no harm to data.
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
Event: l2_update; errno: 28; imm: off; once: off; write -b
write failed: No space left on device
-128 leaked clusters were found on the image.
+127 leaked clusters were found on the image.
This means waste of disk space, but no harm to data.
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
Event: l2_alloc.write; errno: 5; imm: off; once: on; write
write failed: Input/output error
-No errors were found on the image.
+
+1 leaked clusters were found on the image.
+This means waste of disk space, but no harm to data.
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
Event: l2_alloc.write; errno: 5; imm: off; once: on; write -b
@@ -205,7 +207,9 @@ Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
Event: l2_alloc.write; errno: 28; imm: off; once: on; write
write failed: No space left on device
-No errors were found on the image.
+
+1 leaked clusters were found on the image.
+This means waste of disk space, but no harm to data.
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
Event: l2_alloc.write; errno: 28; imm: off; once: on; write -b
@@ -575,7 +579,6 @@ No errors were found on the image.
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
Event: l1_grow.write_table; errno: 5; imm: off; once: off
-qcow2_free_clusters failed: Input/output error
write failed: Input/output error
No errors were found on the image.
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
@@ -586,7 +589,6 @@ No errors were found on the image.
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
Event: l1_grow.write_table; errno: 28; imm: off; once: off
-qcow2_free_clusters failed: No space left on device
write failed: No space left on device
No errors were found on the image.
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
@@ -597,7 +599,6 @@ No errors were found on the image.
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
Event: l1_grow.activate_table; errno: 5; imm: off; once: off
-qcow2_free_clusters failed: Input/output error
write failed: Input/output error
96 leaked clusters were found on the image.
@@ -610,7 +611,6 @@ No errors were found on the image.
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
Event: l1_grow.activate_table; errno: 28; imm: off; once: off
-qcow2_free_clusters failed: No space left on device
write failed: No space left on device
96 leaked clusters were found on the image.
diff --git a/tests/qemu-iotests/026.out.nocache b/tests/qemu-iotests/026.out.nocache
new file mode 100644
index 0000000..33bad0d
--- /dev/null
+++ b/tests/qemu-iotests/026.out.nocache
@@ -0,0 +1,626 @@
+QA output created by 026
+Errors while writing 128 kB
+
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: l1_update; errno: 5; imm: off; once: on; write
+write failed: Input/output error
+
+1 leaked clusters were found on the image.
+This means waste of disk space, but no harm to data.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: l1_update; errno: 5; imm: off; once: on; write -b
+write failed: Input/output error
+
+1 leaked clusters were found on the image.
+This means waste of disk space, but no harm to data.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: l1_update; errno: 5; imm: off; once: off; write
+write failed: Input/output error
+
+1 leaked clusters were found on the image.
+This means waste of disk space, but no harm to data.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: l1_update; errno: 5; imm: off; once: off; write -b
+write failed: Input/output error
+
+1 leaked clusters were found on the image.
+This means waste of disk space, but no harm to data.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: l1_update; errno: 28; imm: off; once: on; write
+write failed: No space left on device
+
+1 leaked clusters were found on the image.
+This means waste of disk space, but no harm to data.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: l1_update; errno: 28; imm: off; once: on; write -b
+write failed: No space left on device
+
+1 leaked clusters were found on the image.
+This means waste of disk space, but no harm to data.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: l1_update; errno: 28; imm: off; once: off; write
+write failed: No space left on device
+
+1 leaked clusters were found on the image.
+This means waste of disk space, but no harm to data.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: l1_update; errno: 28; imm: off; once: off; write -b
+write failed: No space left on device
+
+1 leaked clusters were found on the image.
+This means waste of disk space, but no harm to data.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: l2_load; errno: 5; imm: off; once: on; write
+wrote 131072/131072 bytes at offset 0
+128 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+write failed: Input/output error
+read failed: Input/output error
+No errors were found on the image.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: l2_load; errno: 5; imm: off; once: on; write -b
+wrote 131072/131072 bytes at offset 0
+128 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+write failed: Input/output error
+read failed: Input/output error
+No errors were found on the image.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: l2_load; errno: 5; imm: off; once: off; write
+wrote 131072/131072 bytes at offset 0
+128 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+write failed: Input/output error
+read failed: Input/output error
+No errors were found on the image.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: l2_load; errno: 5; imm: off; once: off; write -b
+wrote 131072/131072 bytes at offset 0
+128 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+write failed: Input/output error
+read failed: Input/output error
+No errors were found on the image.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: l2_load; errno: 28; imm: off; once: on; write
+wrote 131072/131072 bytes at offset 0
+128 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+write failed: No space left on device
+read failed: No space left on device
+No errors were found on the image.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: l2_load; errno: 28; imm: off; once: on; write -b
+wrote 131072/131072 bytes at offset 0
+128 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+write failed: No space left on device
+read failed: No space left on device
+No errors were found on the image.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: l2_load; errno: 28; imm: off; once: off; write
+wrote 131072/131072 bytes at offset 0
+128 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+write failed: No space left on device
+read failed: No space left on device
+No errors were found on the image.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: l2_load; errno: 28; imm: off; once: off; write -b
+wrote 131072/131072 bytes at offset 0
+128 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+write failed: No space left on device
+read failed: No space left on device
+No errors were found on the image.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: l2_update; errno: 5; imm: off; once: on; write
+wrote 131072/131072 bytes at offset 0
+128 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+
+127 leaked clusters were found on the image.
+This means waste of disk space, but no harm to data.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: l2_update; errno: 5; imm: off; once: on; write -b
+wrote 131072/131072 bytes at offset 0
+128 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+
+127 leaked clusters were found on the image.
+This means waste of disk space, but no harm to data.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: l2_update; errno: 5; imm: off; once: off; write
+wrote 131072/131072 bytes at offset 0
+128 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+
+127 leaked clusters were found on the image.
+This means waste of disk space, but no harm to data.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: l2_update; errno: 5; imm: off; once: off; write -b
+wrote 131072/131072 bytes at offset 0
+128 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+
+127 leaked clusters were found on the image.
+This means waste of disk space, but no harm to data.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: l2_update; errno: 28; imm: off; once: on; write
+wrote 131072/131072 bytes at offset 0
+128 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+
+127 leaked clusters were found on the image.
+This means waste of disk space, but no harm to data.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: l2_update; errno: 28; imm: off; once: on; write -b
+wrote 131072/131072 bytes at offset 0
+128 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+
+127 leaked clusters were found on the image.
+This means waste of disk space, but no harm to data.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: l2_update; errno: 28; imm: off; once: off; write
+wrote 131072/131072 bytes at offset 0
+128 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+
+127 leaked clusters were found on the image.
+This means waste of disk space, but no harm to data.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: l2_update; errno: 28; imm: off; once: off; write -b
+wrote 131072/131072 bytes at offset 0
+128 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+
+127 leaked clusters were found on the image.
+This means waste of disk space, but no harm to data.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: l2_alloc.write; errno: 5; imm: off; once: on; write
+write failed: Input/output error
+
+1 leaked clusters were found on the image.
+This means waste of disk space, but no harm to data.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: l2_alloc.write; errno: 5; imm: off; once: on; write -b
+write failed: Input/output error
+
+1 leaked clusters were found on the image.
+This means waste of disk space, but no harm to data.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: l2_alloc.write; errno: 5; imm: off; once: off; write
+write failed: Input/output error
+No errors were found on the image.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: l2_alloc.write; errno: 5; imm: off; once: off; write -b
+write failed: Input/output error
+
+1 leaked clusters were found on the image.
+This means waste of disk space, but no harm to data.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: l2_alloc.write; errno: 28; imm: off; once: on; write
+write failed: No space left on device
+
+1 leaked clusters were found on the image.
+This means waste of disk space, but no harm to data.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: l2_alloc.write; errno: 28; imm: off; once: on; write -b
+write failed: No space left on device
+
+1 leaked clusters were found on the image.
+This means waste of disk space, but no harm to data.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: l2_alloc.write; errno: 28; imm: off; once: off; write
+write failed: No space left on device
+No errors were found on the image.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: l2_alloc.write; errno: 28; imm: off; once: off; write -b
+write failed: No space left on device
+
+1 leaked clusters were found on the image.
+This means waste of disk space, but no harm to data.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: write_aio; errno: 5; imm: off; once: on; write
+write failed: Input/output error
+No errors were found on the image.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: write_aio; errno: 5; imm: off; once: on; write -b
+write failed: Input/output error
+No errors were found on the image.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: write_aio; errno: 5; imm: off; once: off; write
+write failed: Input/output error
+No errors were found on the image.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: write_aio; errno: 5; imm: off; once: off; write -b
+write failed: Input/output error
+No errors were found on the image.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: write_aio; errno: 28; imm: off; once: on; write
+write failed: No space left on device
+No errors were found on the image.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: write_aio; errno: 28; imm: off; once: on; write -b
+write failed: No space left on device
+No errors were found on the image.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: write_aio; errno: 28; imm: off; once: off; write
+write failed: No space left on device
+No errors were found on the image.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: write_aio; errno: 28; imm: off; once: off; write -b
+write failed: No space left on device
+No errors were found on the image.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: refblock_load; errno: 5; imm: off; once: on; write
+write failed: Input/output error
+No errors were found on the image.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: refblock_load; errno: 5; imm: off; once: on; write -b
+write failed: Input/output error
+No errors were found on the image.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: refblock_load; errno: 5; imm: off; once: off; write
+write failed: Input/output error
+No errors were found on the image.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: refblock_load; errno: 5; imm: off; once: off; write -b
+write failed: Input/output error
+No errors were found on the image.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: refblock_load; errno: 28; imm: off; once: on; write
+write failed: No space left on device
+No errors were found on the image.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: refblock_load; errno: 28; imm: off; once: on; write -b
+write failed: No space left on device
+No errors were found on the image.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: refblock_load; errno: 28; imm: off; once: off; write
+write failed: No space left on device
+No errors were found on the image.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: refblock_load; errno: 28; imm: off; once: off; write -b
+write failed: No space left on device
+No errors were found on the image.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: refblock_update_part; errno: 5; imm: off; once: on; write
+write failed: Input/output error
+No errors were found on the image.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: refblock_update_part; errno: 5; imm: off; once: on; write -b
+write failed: Input/output error
+No errors were found on the image.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: refblock_update_part; errno: 5; imm: off; once: off; write
+write failed: Input/output error
+No errors were found on the image.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: refblock_update_part; errno: 5; imm: off; once: off; write -b
+write failed: Input/output error
+No errors were found on the image.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: refblock_update_part; errno: 28; imm: off; once: on; write
+write failed: No space left on device
+No errors were found on the image.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: refblock_update_part; errno: 28; imm: off; once: on; write -b
+write failed: No space left on device
+No errors were found on the image.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: refblock_update_part; errno: 28; imm: off; once: off; write
+write failed: No space left on device
+No errors were found on the image.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: refblock_update_part; errno: 28; imm: off; once: off; write -b
+write failed: No space left on device
+No errors were found on the image.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: refblock_alloc; errno: 5; imm: off; once: on; write
+write failed: Input/output error
+No errors were found on the image.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: refblock_alloc; errno: 5; imm: off; once: on; write -b
+write failed: Input/output error
+No errors were found on the image.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: refblock_alloc; errno: 5; imm: off; once: off; write
+write failed: Input/output error
+No errors were found on the image.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: refblock_alloc; errno: 5; imm: off; once: off; write -b
+write failed: Input/output error
+No errors were found on the image.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: refblock_alloc; errno: 28; imm: off; once: on; write
+write failed: No space left on device
+No errors were found on the image.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: refblock_alloc; errno: 28; imm: off; once: on; write -b
+write failed: No space left on device
+No errors were found on the image.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: refblock_alloc; errno: 28; imm: off; once: off; write
+write failed: No space left on device
+No errors were found on the image.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: refblock_alloc; errno: 28; imm: off; once: off; write -b
+write failed: No space left on device
+No errors were found on the image.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: cluster_alloc; errno: 5; imm: off; once: on; write
+write failed: Input/output error
+No errors were found on the image.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: cluster_alloc; errno: 5; imm: off; once: on; write -b
+write failed: Input/output error
+No errors were found on the image.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: cluster_alloc; errno: 5; imm: off; once: off; write
+write failed: Input/output error
+No errors were found on the image.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: cluster_alloc; errno: 5; imm: off; once: off; write -b
+write failed: Input/output error
+No errors were found on the image.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: cluster_alloc; errno: 28; imm: off; once: on; write
+write failed: No space left on device
+No errors were found on the image.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: cluster_alloc; errno: 28; imm: off; once: on; write -b
+write failed: No space left on device
+No errors were found on the image.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: cluster_alloc; errno: 28; imm: off; once: off; write
+write failed: No space left on device
+No errors were found on the image.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: cluster_alloc; errno: 28; imm: off; once: off; write -b
+write failed: No space left on device
+No errors were found on the image.
+
+=== Refcout table growth tests ===
+
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: refblock_alloc.hookup; errno: 28; imm: off; once: on; write
+write failed: No space left on device
+No errors were found on the image.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: refblock_alloc.hookup; errno: 28; imm: off; once: on; write -b
+write failed: No space left on device
+No errors were found on the image.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: refblock_alloc.hookup; errno: 28; imm: off; once: off; write
+write failed: No space left on device
+
+55 leaked clusters were found on the image.
+This means waste of disk space, but no harm to data.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: refblock_alloc.hookup; errno: 28; imm: off; once: off; write -b
+write failed: No space left on device
+
+251 leaked clusters were found on the image.
+This means waste of disk space, but no harm to data.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: refblock_alloc.write; errno: 28; imm: off; once: on; write
+write failed: No space left on device
+No errors were found on the image.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: refblock_alloc.write; errno: 28; imm: off; once: on; write -b
+write failed: No space left on device
+No errors were found on the image.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: refblock_alloc.write; errno: 28; imm: off; once: off; write
+write failed: No space left on device
+No errors were found on the image.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: refblock_alloc.write; errno: 28; imm: off; once: off; write -b
+write failed: No space left on device
+No errors were found on the image.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: refblock_alloc.write_blocks; errno: 28; imm: off; once: on; write
+write failed: No space left on device
+No errors were found on the image.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: refblock_alloc.write_blocks; errno: 28; imm: off; once: on; write -b
+write failed: No space left on device
+No errors were found on the image.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: refblock_alloc.write_blocks; errno: 28; imm: off; once: off; write
+write failed: No space left on device
+
+10 leaked clusters were found on the image.
+This means waste of disk space, but no harm to data.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: refblock_alloc.write_blocks; errno: 28; imm: off; once: off; write -b
+write failed: No space left on device
+
+23 leaked clusters were found on the image.
+This means waste of disk space, but no harm to data.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: refblock_alloc.write_table; errno: 28; imm: off; once: on; write
+write failed: No space left on device
+No errors were found on the image.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: refblock_alloc.write_table; errno: 28; imm: off; once: on; write -b
+write failed: No space left on device
+No errors were found on the image.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: refblock_alloc.write_table; errno: 28; imm: off; once: off; write
+write failed: No space left on device
+
+10 leaked clusters were found on the image.
+This means waste of disk space, but no harm to data.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: refblock_alloc.write_table; errno: 28; imm: off; once: off; write -b
+write failed: No space left on device
+
+23 leaked clusters were found on the image.
+This means waste of disk space, but no harm to data.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: refblock_alloc.switch_table; errno: 28; imm: off; once: on; write
+write failed: No space left on device
+No errors were found on the image.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: refblock_alloc.switch_table; errno: 28; imm: off; once: on; write -b
+write failed: No space left on device
+No errors were found on the image.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: refblock_alloc.switch_table; errno: 28; imm: off; once: off; write
+write failed: No space left on device
+
+10 leaked clusters were found on the image.
+This means waste of disk space, but no harm to data.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: refblock_alloc.switch_table; errno: 28; imm: off; once: off; write -b
+write failed: No space left on device
+
+23 leaked clusters were found on the image.
+This means waste of disk space, but no harm to data.
+
+=== L1 growth tests ===
+
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: l1_grow.alloc_table; errno: 5; imm: off; once: on
+write failed: Input/output error
+No errors were found on the image.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: l1_grow.alloc_table; errno: 5; imm: off; once: off
+write failed: Input/output error
+No errors were found on the image.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: l1_grow.alloc_table; errno: 28; imm: off; once: on
+write failed: No space left on device
+No errors were found on the image.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: l1_grow.alloc_table; errno: 28; imm: off; once: off
+write failed: No space left on device
+No errors were found on the image.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: l1_grow.write_table; errno: 5; imm: off; once: on
+write failed: Input/output error
+No errors were found on the image.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: l1_grow.write_table; errno: 5; imm: off; once: off
+write failed: Input/output error
+No errors were found on the image.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: l1_grow.write_table; errno: 28; imm: off; once: on
+write failed: No space left on device
+No errors were found on the image.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: l1_grow.write_table; errno: 28; imm: off; once: off
+write failed: No space left on device
+No errors were found on the image.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: l1_grow.activate_table; errno: 5; imm: off; once: on
+write failed: Input/output error
+No errors were found on the image.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: l1_grow.activate_table; errno: 5; imm: off; once: off
+write failed: Input/output error
+
+96 leaked clusters were found on the image.
+This means waste of disk space, but no harm to data.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: l1_grow.activate_table; errno: 28; imm: off; once: on
+write failed: No space left on device
+No errors were found on the image.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
+
+Event: l1_grow.activate_table; errno: 28; imm: off; once: off
+write failed: No space left on device
+
+96 leaked clusters were found on the image.
+This means waste of disk space, but no harm to data.
+*** done
diff --git a/tests/qemu-iotests/check b/tests/qemu-iotests/check
index e51bae8..4ecf497 100755
--- a/tests/qemu-iotests/check
+++ b/tests/qemu-iotests/check
@@ -239,12 +239,18 @@ do
echo -n " [failed, exit status $sts]"
err=true
fi
- if [ ! -f $seq.out ]
+
+ reference=$seq.out
+ if (echo $QEMU_IO_OPTIONS | grep -s -- '--nocache' > /dev/null); then
+ [ -f $seq.out.nocache ] && reference=$seq.out.nocache
+ fi
+
+ if [ ! -f $reference ]
then
echo " - no qualified output"
err=true
else
- if diff -w $seq.out $tmp.out >/dev/null 2>&1
+ if diff -w $reference $tmp.out >/dev/null 2>&1
then
echo ""
if $err
@@ -256,7 +262,7 @@ do
else
echo " - output mismatch (see $seq.out.bad)"
mv $tmp.out $seq.out.bad
- $diff -w $seq.out $seq.out.bad
+ $diff -w $reference $seq.out.bad
err=true
fi
fi
--
1.8.3.1
^ permalink raw reply related [flat|nested] 56+ messages in thread
* Re: [Qemu-devel] [PULL 33/42] block: return BDRV_BLOCK_ZERO past end of backing file
2013-09-06 15:39 ` [Qemu-devel] [PULL 33/42] block: return BDRV_BLOCK_ZERO past end of backing file Stefan Hajnoczi
@ 2013-09-13 7:33 ` Peter Lieven
2013-09-13 8:25 ` Paolo Bonzini
0 siblings, 1 reply; 56+ messages in thread
From: Peter Lieven @ 2013-09-13 7:33 UTC (permalink / raw)
To: Stefan Hajnoczi; +Cc: Paolo Bonzini, qemu-devel, Anthony Liguori
On 06.09.2013 17:39, Stefan Hajnoczi wrote:
> From: Paolo Bonzini <pbonzini@redhat.com>
>
> If the sectors are unallocated and we are past the end of the
> backing file, they will read as zero.
>
> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
> ---
> block.c | 12 ++++++++++--
> 1 file changed, 10 insertions(+), 2 deletions(-)
>
> diff --git a/block.c b/block.c
> index aa9ec83..82bbd6c 100644
> --- a/block.c
> +++ b/block.c
> @@ -3102,8 +3102,16 @@ static int64_t coroutine_fn bdrv_co_get_block_status(BlockDriverState *bs,
> return ret;
> }
>
> - if (!(ret & BDRV_BLOCK_DATA) && bdrv_has_zero_init(bs)) {
> - ret |= BDRV_BLOCK_ZERO;
> + if (!(ret & BDRV_BLOCK_DATA)) {
> + if (bdrv_has_zero_init(bs)) {
this should be bdi->discard_zeroes. bdrv_has_zero_init() does only give a valid result
right after bdrv_create(). i currently working on extending bdi. I can send a patch for this
if you agree.
> + ret |= BDRV_BLOCK_ZERO;
> + } else {
> + BlockDriverState *bs2 = bs->backing_hd;
this segfaults if there is no backing_hd. found while testing get_block_status with iscsi.
paolo, is this the correct fix?
@@ -3110,7 +3157,7 @@ static int64_t coroutine_fn bdrv_co_get_block_status(BlockDriverState *bs,
if (!(ret & BDRV_BLOCK_DATA)) {
if (bdrv_has_zero_init(bs)) {
ret |= BDRV_BLOCK_ZERO;
- } else {
+ } else if (bs->backing_hd) {
BlockDriverState *bs2 = bs->backing_hd;
int64_t length2 = bdrv_getlength(bs2);
if (length2 >= 0 && sector_num >= (length2 >> BDRV_SECTOR_BITS)) {
> + int64_t length2 = bdrv_getlength(bs2);
> + if (length2 >= 0 && sector_num >= (length2 >> BDRV_SECTOR_BITS)) {
> + ret |= BDRV_BLOCK_ZERO;
> + }
> + }
> }
> return ret;
> }
^ permalink raw reply [flat|nested] 56+ messages in thread
* Re: [Qemu-devel] [PULL 39/42] block: look for zero blocks in bs->file
2013-09-06 15:39 ` [Qemu-devel] [PULL 39/42] block: look for zero blocks in bs->file Stefan Hajnoczi
@ 2013-09-13 8:00 ` Peter Lieven
2013-09-13 9:08 ` Peter Lieven
0 siblings, 1 reply; 56+ messages in thread
From: Peter Lieven @ 2013-09-13 8:00 UTC (permalink / raw)
To: Stefan Hajnoczi; +Cc: Paolo Bonzini, qemu-devel, Anthony Liguori
On 06.09.2013 17:39, Stefan Hajnoczi wrote:
> From: Paolo Bonzini <pbonzini@redhat.com>
>
> Reviewed-by: Eric Blake <eblake@redhat.com>
> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
> ---
> block.c | 16 +++++++++++++++-
> 1 file changed, 15 insertions(+), 1 deletion(-)
>
> diff --git a/block.c b/block.c
> index 3c39769..a325efc 100644
> --- a/block.c
> +++ b/block.c
> @@ -3075,7 +3075,7 @@ static int64_t coroutine_fn bdrv_co_get_block_status(BlockDriverState *bs,
> {
> int64_t length;
> int64_t n;
> - int64_t ret;
> + int64_t ret, ret2;
>
> length = bdrv_getlength(bs);
> if (length < 0) {
> @@ -3117,6 +3117,20 @@ static int64_t coroutine_fn bdrv_co_get_block_status(BlockDriverState *bs,
> }
> }
> }
> +
> + if (bs->file &&
> + (ret & BDRV_BLOCK_DATA) && !(ret & BDRV_BLOCK_ZERO) &&
> + (ret & BDRV_BLOCK_OFFSET_VALID)) {
> + ret2 = bdrv_co_get_block_status(bs->file, ret >> BDRV_SECTOR_BITS,
> + *pnum, pnum);
> + if (ret2 >= 0) {
> + /* Ignore errors. This is just providing extra information, it
> + * is useful but not necessary.
> + */
> + ret |= (ret2 & BDRV_BLOCK_ZERO);
> + }
> + }
> +
> return ret;
> }
>
for allocated blocks in iscsi this actually leads to 2 call outs to iscsi_get_block_status.
because the raw driver passes the get_block_status request to bs->file.
^ permalink raw reply [flat|nested] 56+ messages in thread
* Re: [Qemu-devel] [PULL 30/42] block: define get_block_status return value
2013-09-06 15:39 ` [Qemu-devel] [PULL 30/42] block: define get_block_status return value Stefan Hajnoczi
@ 2013-09-13 8:04 ` Peter Lieven
2013-09-13 8:26 ` Paolo Bonzini
0 siblings, 1 reply; 56+ messages in thread
From: Peter Lieven @ 2013-09-13 8:04 UTC (permalink / raw)
To: Stefan Hajnoczi; +Cc: Paolo Bonzini, qemu-devel, Anthony Liguori
On 06.09.2013 17:39, Stefan Hajnoczi wrote:
> From: Paolo Bonzini <pbonzini@redhat.com>
>
> Define the return value of get_block_status. Bits 0, 1, 2 and 9-62
> are valid; bit 63 (the sign bit) is reserved for errors. Bits 3-8
> are left for future extensions.
>
> The return code is compatible with the old is_allocated API: if a driver
> only returns 0 or 1 (aka BDRV_BLOCK_DATA) like is_allocated used to,
> clients of is_allocated will not have any change in behavior. Still,
> we will return more precise information in the next patches and the
> new definition of bdrv_is_allocated is already prepared for this.
>
> Reviewed-by: Eric Blake <eblake@redhat.com>
> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
> ---
> block.c | 10 ++++++++--
> include/block/block.h | 26 ++++++++++++++++++++++++++
> 2 files changed, 34 insertions(+), 2 deletions(-)
>
> diff --git a/block.c b/block.c
> index a5bfe74..97406ec 100644
> --- a/block.c
> +++ b/block.c
> @@ -3093,7 +3093,7 @@ static int64_t coroutine_fn bdrv_co_get_block_status(BlockDriverState *bs,
>
> if (!bs->drv->bdrv_co_get_block_status) {
> *pnum = nb_sectors;
> - return 1;
> + return BDRV_BLOCK_DATA;
> }
>
> return bs->drv->bdrv_co_get_block_status(bs, sector_num, nb_sectors, pnum);
> @@ -3143,7 +3143,13 @@ int64_t bdrv_get_block_status(BlockDriverState *bs, int64_t sector_num,
> int coroutine_fn bdrv_is_allocated(BlockDriverState *bs, int64_t sector_num,
> int nb_sectors, int *pnum)
> {
> - return bdrv_get_block_status(bs, sector_num, nb_sectors, pnum);
> + int64_t ret = bdrv_get_block_status(bs, sector_num, nb_sectors, pnum);
> + if (ret < 0) {
sorry if I repeat myself.
isn't here a *pnum = 0 missing?
Peter
--
Mit freundlichen Grüßen
Peter Lieven
...........................................................
KAMP Netzwerkdienste GmbH
Vestische Str. 89-91 | 46117 Oberhausen
Tel: +49 (0) 208.89 402-50 | Fax: +49 (0) 208.89 402-40
pl@kamp.de | http://www.kamp.de
Geschäftsführer: Heiner Lante | Michael Lante
Amtsgericht Duisburg | HRB Nr. 12154
USt-Id-Nr.: DE 120607556
...........................................................
^ permalink raw reply [flat|nested] 56+ messages in thread
* Re: [Qemu-devel] [PULL 33/42] block: return BDRV_BLOCK_ZERO past end of backing file
2013-09-13 7:33 ` Peter Lieven
@ 2013-09-13 8:25 ` Paolo Bonzini
2013-09-13 15:20 ` Kevin Wolf
0 siblings, 1 reply; 56+ messages in thread
From: Paolo Bonzini @ 2013-09-13 8:25 UTC (permalink / raw)
To: Peter Lieven; +Cc: Anthony Liguori, qemu-devel, Stefan Hajnoczi
Il 13/09/2013 09:33, Peter Lieven ha scritto:
> On 06.09.2013 17:39, Stefan Hajnoczi wrote:
>> From: Paolo Bonzini <pbonzini@redhat.com>
>>
>> If the sectors are unallocated and we are past the end of the
>> backing file, they will read as zero.
>>
>> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
>> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
>> ---
>> block.c | 12 ++++++++++--
>> 1 file changed, 10 insertions(+), 2 deletions(-)
>>
>> diff --git a/block.c b/block.c
>> index aa9ec83..82bbd6c 100644
>> --- a/block.c
>> +++ b/block.c
>> @@ -3102,8 +3102,16 @@ static int64_t coroutine_fn
>> bdrv_co_get_block_status(BlockDriverState *bs,
>> return ret;
>> }
>> - if (!(ret & BDRV_BLOCK_DATA) && bdrv_has_zero_init(bs)) {
>> - ret |= BDRV_BLOCK_ZERO;
>> + if (!(ret & BDRV_BLOCK_DATA)) {
>> + if (bdrv_has_zero_init(bs)) {
> this should be bdi->discard_zeroes. bdrv_has_zero_init() does only give
> a valid result
> right after bdrv_create(). i currently working on extending bdi. I can
> send a patch for this
> if you agree.
Yes, please. Right now there is no bdi->discard_zeroes.
>> + ret |= BDRV_BLOCK_ZERO;
>> + } else {
>> + BlockDriverState *bs2 = bs->backing_hd;
>
> this segfaults if there is no backing_hd. found while testing
> get_block_status with iscsi.
>
> paolo, is this the correct fix?
Yes, thanks.
Paolo
> @@ -3110,7 +3157,7 @@ static int64_t coroutine_fn
> bdrv_co_get_block_status(BlockDriverState *bs,
> if (!(ret & BDRV_BLOCK_DATA)) {
> if (bdrv_has_zero_init(bs)) {
> ret |= BDRV_BLOCK_ZERO;
> - } else {
> + } else if (bs->backing_hd) {
> BlockDriverState *bs2 = bs->backing_hd;
> int64_t length2 = bdrv_getlength(bs2);
> if (length2 >= 0 && sector_num >= (length2 >>
> BDRV_SECTOR_BITS)) {
>
>
>> + int64_t length2 = bdrv_getlength(bs2);
>> + if (length2 >= 0 && sector_num >= (length2 >>
>> BDRV_SECTOR_BITS)) {
>> + ret |= BDRV_BLOCK_ZERO;
>> + }
>> + }
>> }
>> return ret;
>> }
>
^ permalink raw reply [flat|nested] 56+ messages in thread
* Re: [Qemu-devel] [PULL 30/42] block: define get_block_status return value
2013-09-13 8:04 ` Peter Lieven
@ 2013-09-13 8:26 ` Paolo Bonzini
2013-09-13 8:51 ` Peter Lieven
0 siblings, 1 reply; 56+ messages in thread
From: Paolo Bonzini @ 2013-09-13 8:26 UTC (permalink / raw)
To: Peter Lieven; +Cc: Anthony Liguori, qemu-devel, Stefan Hajnoczi
Il 13/09/2013 10:04, Peter Lieven ha scritto:
> On 06.09.2013 17:39, Stefan Hajnoczi wrote:
>> From: Paolo Bonzini <pbonzini@redhat.com>
>>
>> Define the return value of get_block_status. Bits 0, 1, 2 and 9-62
>> are valid; bit 63 (the sign bit) is reserved for errors. Bits 3-8
>> are left for future extensions.
>>
>> The return code is compatible with the old is_allocated API: if a driver
>> only returns 0 or 1 (aka BDRV_BLOCK_DATA) like is_allocated used to,
>> clients of is_allocated will not have any change in behavior. Still,
>> we will return more precise information in the next patches and the
>> new definition of bdrv_is_allocated is already prepared for this.
>>
>> Reviewed-by: Eric Blake <eblake@redhat.com>
>> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
>> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
>> ---
>> block.c | 10 ++++++++--
>> include/block/block.h | 26 ++++++++++++++++++++++++++
>> 2 files changed, 34 insertions(+), 2 deletions(-)
>>
>> diff --git a/block.c b/block.c
>> index a5bfe74..97406ec 100644
>> --- a/block.c
>> +++ b/block.c
>> @@ -3093,7 +3093,7 @@ static int64_t coroutine_fn
>> bdrv_co_get_block_status(BlockDriverState *bs,
>> if (!bs->drv->bdrv_co_get_block_status) {
>> *pnum = nb_sectors;
>> - return 1;
>> + return BDRV_BLOCK_DATA;
>> }
>> return bs->drv->bdrv_co_get_block_status(bs, sector_num,
>> nb_sectors, pnum);
>> @@ -3143,7 +3143,13 @@ int64_t bdrv_get_block_status(BlockDriverState
>> *bs, int64_t sector_num,
>> int coroutine_fn bdrv_is_allocated(BlockDriverState *bs, int64_t
>> sector_num,
>> int nb_sectors, int *pnum)
>> {
>> - return bdrv_get_block_status(bs, sector_num, nb_sectors, pnum);
>> + int64_t ret = bdrv_get_block_status(bs, sector_num, nb_sectors,
>> pnum);
>> + if (ret < 0) {
> sorry if I repeat myself.
>
> isn't here a *pnum = 0 missing?
I think an earlier patch makes it unnecessary, because I'm checking the
return status of bdrv_get_block_status and bdrv_is_allocated. In any
case the right place to put it would be in bdrv_get_block_status.
Paolo
^ permalink raw reply [flat|nested] 56+ messages in thread
* Re: [Qemu-devel] [PULL 30/42] block: define get_block_status return value
2013-09-13 8:26 ` Paolo Bonzini
@ 2013-09-13 8:51 ` Peter Lieven
0 siblings, 0 replies; 56+ messages in thread
From: Peter Lieven @ 2013-09-13 8:51 UTC (permalink / raw)
To: Paolo Bonzini; +Cc: Anthony Liguori, qemu-devel, Stefan Hajnoczi
On 13.09.2013 10:26, Paolo Bonzini wrote:
> Il 13/09/2013 10:04, Peter Lieven ha scritto:
>> On 06.09.2013 17:39, Stefan Hajnoczi wrote:
>>> From: Paolo Bonzini <pbonzini@redhat.com>
>>>
>>> Define the return value of get_block_status. Bits 0, 1, 2 and 9-62
>>> are valid; bit 63 (the sign bit) is reserved for errors. Bits 3-8
>>> are left for future extensions.
>>>
>>> The return code is compatible with the old is_allocated API: if a driver
>>> only returns 0 or 1 (aka BDRV_BLOCK_DATA) like is_allocated used to,
>>> clients of is_allocated will not have any change in behavior. Still,
>>> we will return more precise information in the next patches and the
>>> new definition of bdrv_is_allocated is already prepared for this.
>>>
>>> Reviewed-by: Eric Blake <eblake@redhat.com>
>>> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
>>> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
>>> ---
>>> block.c | 10 ++++++++--
>>> include/block/block.h | 26 ++++++++++++++++++++++++++
>>> 2 files changed, 34 insertions(+), 2 deletions(-)
>>>
>>> diff --git a/block.c b/block.c
>>> index a5bfe74..97406ec 100644
>>> --- a/block.c
>>> +++ b/block.c
>>> @@ -3093,7 +3093,7 @@ static int64_t coroutine_fn
>>> bdrv_co_get_block_status(BlockDriverState *bs,
>>> if (!bs->drv->bdrv_co_get_block_status) {
>>> *pnum = nb_sectors;
>>> - return 1;
>>> + return BDRV_BLOCK_DATA;
>>> }
>>> return bs->drv->bdrv_co_get_block_status(bs, sector_num,
>>> nb_sectors, pnum);
>>> @@ -3143,7 +3143,13 @@ int64_t bdrv_get_block_status(BlockDriverState
>>> *bs, int64_t sector_num,
>>> int coroutine_fn bdrv_is_allocated(BlockDriverState *bs, int64_t
>>> sector_num,
>>> int nb_sectors, int *pnum)
>>> {
>>> - return bdrv_get_block_status(bs, sector_num, nb_sectors, pnum);
>>> + int64_t ret = bdrv_get_block_status(bs, sector_num, nb_sectors,
>>> pnum);
>>> + if (ret < 0) {
>> sorry if I repeat myself.
>>
>> isn't here a *pnum = 0 missing?
> I think an earlier patch makes it unnecessary, because I'm checking the
> return status of bdrv_get_block_status and bdrv_is_allocated. In any
> case the right place to put it would be in bdrv_get_block_status.
Ok, then I think for safety it should be added here:
@@ -3104,13 +3151,14 @@ static int64_t coroutine_fn bdrv_co_get_block_status(BlockDriverState *bs,
ret = bs->drv->bdrv_co_get_block_status(bs, sector_num, nb_sectors, pnum);
if (ret < 0) {
+ *pnum = 0;
return ret;
}
because the new get_block_status api requires a ret < 0 if an error occurs. in case of an error
someone will write sth like ret = -EINVAL in the block driver. this not necessary implies *pnum = 0; the old
bdrv_is_allocated framework required a *pnum = 0 on error, but if someone (like me for iscsi)
creates bdrv_get_block_status from scratch will not explicity do this.
Peter
^ permalink raw reply [flat|nested] 56+ messages in thread
* Re: [Qemu-devel] [PULL 39/42] block: look for zero blocks in bs->file
2013-09-13 8:00 ` Peter Lieven
@ 2013-09-13 9:08 ` Peter Lieven
2013-09-13 9:10 ` Paolo Bonzini
0 siblings, 1 reply; 56+ messages in thread
From: Peter Lieven @ 2013-09-13 9:08 UTC (permalink / raw)
To: Peter Lieven; +Cc: Anthony Liguori, Paolo Bonzini, qemu-devel, Stefan Hajnoczi
On 13.09.2013 10:00, Peter Lieven wrote:
> On 06.09.2013 17:39, Stefan Hajnoczi wrote:
>> From: Paolo Bonzini <pbonzini@redhat.com>
>>
>> Reviewed-by: Eric Blake <eblake@redhat.com>
>> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
>> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
>> ---
>> block.c | 16 +++++++++++++++-
>> 1 file changed, 15 insertions(+), 1 deletion(-)
>>
>> diff --git a/block.c b/block.c
>> index 3c39769..a325efc 100644
>> --- a/block.c
>> +++ b/block.c
>> @@ -3075,7 +3075,7 @@ static int64_t coroutine_fn bdrv_co_get_block_status(BlockDriverState *bs,
>> {
>> int64_t length;
>> int64_t n;
>> - int64_t ret;
>> + int64_t ret, ret2;
>> length = bdrv_getlength(bs);
>> if (length < 0) {
>> @@ -3117,6 +3117,20 @@ static int64_t coroutine_fn bdrv_co_get_block_status(BlockDriverState *bs,
>> }
>> }
>> }
>> +
>> + if (bs->file &&
>> + (ret & BDRV_BLOCK_DATA) && !(ret & BDRV_BLOCK_ZERO) &&
>> + (ret & BDRV_BLOCK_OFFSET_VALID)) {
>> + ret2 = bdrv_co_get_block_status(bs->file, ret >> BDRV_SECTOR_BITS,
>> + *pnum, pnum);
>> + if (ret2 >= 0) {
>> + /* Ignore errors. This is just providing extra information, it
>> + * is useful but not necessary.
>> + */
>> + ret |= (ret2 & BDRV_BLOCK_ZERO);
>> + }
>> + }
>> +
>> return ret;
>> }
> for allocated blocks in iscsi this actually leads to 2 call outs to iscsi_get_block_status.
>
> because the raw driver passes the get_block_status request to bs->file.
>
correct patch?
@@ -3119,9 +3167,8 @@ static int64_t coroutine_fn bdrv_co_get_block_status(BlockDriverState *bs,
}
}
- if (bs->file &&
- (ret & BDRV_BLOCK_DATA) && !(ret & BDRV_BLOCK_ZERO) &&
- (ret & BDRV_BLOCK_OFFSET_VALID)) {
+ if (bs->file && (ret & BDRV_BLOCK_DATA) && !(ret & BDRV_BLOCK_ZERO) &&
+ (ret & BDRV_BLOCK_OFFSET_VALID) && bs->drv != bdrv_find_format("raw")) {
ret2 = bdrv_co_get_block_status(bs->file, ret >> BDRV_SECTOR_BITS,
*pnum, pnum);
if (ret2 >= 0) {
^ permalink raw reply [flat|nested] 56+ messages in thread
* Re: [Qemu-devel] [PULL 39/42] block: look for zero blocks in bs->file
2013-09-13 9:08 ` Peter Lieven
@ 2013-09-13 9:10 ` Paolo Bonzini
2013-09-13 9:14 ` Peter Lieven
0 siblings, 1 reply; 56+ messages in thread
From: Paolo Bonzini @ 2013-09-13 9:10 UTC (permalink / raw)
To: Peter Lieven; +Cc: Anthony Liguori, Peter Lieven, qemu-devel, Stefan Hajnoczi
Il 13/09/2013 11:08, Peter Lieven ha scritto:
> On 13.09.2013 10:00, Peter Lieven wrote:
>> On 06.09.2013 17:39, Stefan Hajnoczi wrote:
>>> From: Paolo Bonzini <pbonzini@redhat.com>
>>>
>>> Reviewed-by: Eric Blake <eblake@redhat.com>
>>> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
>>> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
>>> ---
>>> block.c | 16 +++++++++++++++-
>>> 1 file changed, 15 insertions(+), 1 deletion(-)
>>>
>>> diff --git a/block.c b/block.c
>>> index 3c39769..a325efc 100644
>>> --- a/block.c
>>> +++ b/block.c
>>> @@ -3075,7 +3075,7 @@ static int64_t coroutine_fn
>>> bdrv_co_get_block_status(BlockDriverState *bs,
>>> {
>>> int64_t length;
>>> int64_t n;
>>> - int64_t ret;
>>> + int64_t ret, ret2;
>>> length = bdrv_getlength(bs);
>>> if (length < 0) {
>>> @@ -3117,6 +3117,20 @@ static int64_t coroutine_fn
>>> bdrv_co_get_block_status(BlockDriverState *bs,
>>> }
>>> }
>>> }
>>> +
>>> + if (bs->file &&
>>> + (ret & BDRV_BLOCK_DATA) && !(ret & BDRV_BLOCK_ZERO) &&
>>> + (ret & BDRV_BLOCK_OFFSET_VALID)) {
>>> + ret2 = bdrv_co_get_block_status(bs->file, ret >>
>>> BDRV_SECTOR_BITS,
>>> + *pnum, pnum);
>>> + if (ret2 >= 0) {
>>> + /* Ignore errors. This is just providing extra
>>> information, it
>>> + * is useful but not necessary.
>>> + */
>>> + ret |= (ret2 & BDRV_BLOCK_ZERO);
>>> + }
>>> + }
>>> +
>>> return ret;
>>> }
>> for allocated blocks in iscsi this actually leads to 2 call outs to
>> iscsi_get_block_status.
>>
>> because the raw driver passes the get_block_status request to bs->file.
>>
> correct patch?
Correct but a bit hackish... Stefan, Kevin, any ideas?
Paolo
> @@ -3119,9 +3167,8 @@ static int64_t coroutine_fn
> bdrv_co_get_block_status(BlockDriverState *bs,
> }
> }
>
> - if (bs->file &&
> - (ret & BDRV_BLOCK_DATA) && !(ret & BDRV_BLOCK_ZERO) &&
> - (ret & BDRV_BLOCK_OFFSET_VALID)) {
> + if (bs->file && (ret & BDRV_BLOCK_DATA) && !(ret & BDRV_BLOCK_ZERO) &&
> + (ret & BDRV_BLOCK_OFFSET_VALID) && bs->drv !=
> bdrv_find_format("raw")) {
> ret2 = bdrv_co_get_block_status(bs->file, ret >> BDRV_SECTOR_BITS,
> *pnum, pnum);
> if (ret2 >= 0) {
>
^ permalink raw reply [flat|nested] 56+ messages in thread
* Re: [Qemu-devel] [PULL 39/42] block: look for zero blocks in bs->file
2013-09-13 9:10 ` Paolo Bonzini
@ 2013-09-13 9:14 ` Peter Lieven
2013-09-13 9:17 ` Paolo Bonzini
0 siblings, 1 reply; 56+ messages in thread
From: Peter Lieven @ 2013-09-13 9:14 UTC (permalink / raw)
To: Paolo Bonzini; +Cc: Anthony Liguori, Peter Lieven, qemu-devel, Stefan Hajnoczi
On 13.09.2013 11:10, Paolo Bonzini wrote:
> Il 13/09/2013 11:08, Peter Lieven ha scritto:
>> On 13.09.2013 10:00, Peter Lieven wrote:
>>> On 06.09.2013 17:39, Stefan Hajnoczi wrote:
>>>> From: Paolo Bonzini <pbonzini@redhat.com>
>>>>
>>>> Reviewed-by: Eric Blake <eblake@redhat.com>
>>>> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
>>>> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
>>>> ---
>>>> block.c | 16 +++++++++++++++-
>>>> 1 file changed, 15 insertions(+), 1 deletion(-)
>>>>
>>>> diff --git a/block.c b/block.c
>>>> index 3c39769..a325efc 100644
>>>> --- a/block.c
>>>> +++ b/block.c
>>>> @@ -3075,7 +3075,7 @@ static int64_t coroutine_fn
>>>> bdrv_co_get_block_status(BlockDriverState *bs,
>>>> {
>>>> int64_t length;
>>>> int64_t n;
>>>> - int64_t ret;
>>>> + int64_t ret, ret2;
>>>> length = bdrv_getlength(bs);
>>>> if (length < 0) {
>>>> @@ -3117,6 +3117,20 @@ static int64_t coroutine_fn
>>>> bdrv_co_get_block_status(BlockDriverState *bs,
>>>> }
>>>> }
>>>> }
>>>> +
>>>> + if (bs->file &&
>>>> + (ret & BDRV_BLOCK_DATA) && !(ret & BDRV_BLOCK_ZERO) &&
>>>> + (ret & BDRV_BLOCK_OFFSET_VALID)) {
>>>> + ret2 = bdrv_co_get_block_status(bs->file, ret >>
>>>> BDRV_SECTOR_BITS,
>>>> + *pnum, pnum);
>>>> + if (ret2 >= 0) {
>>>> + /* Ignore errors. This is just providing extra
>>>> information, it
>>>> + * is useful but not necessary.
>>>> + */
>>>> + ret |= (ret2 & BDRV_BLOCK_ZERO);
>>>> + }
>>>> + }
>>>> +
>>>> return ret;
>>>> }
>>> for allocated blocks in iscsi this actually leads to 2 call outs to
>>> iscsi_get_block_status.
>>>
>>> because the raw driver passes the get_block_status request to bs->file.
>>>
>> correct patch?
> Correct but a bit hackish... Stefan, Kevin, any ideas?
add a BDRV_BLOCK_RAW flag to the get_block_status flags?
^ permalink raw reply [flat|nested] 56+ messages in thread
* Re: [Qemu-devel] [PULL 39/42] block: look for zero blocks in bs->file
2013-09-13 9:14 ` Peter Lieven
@ 2013-09-13 9:17 ` Paolo Bonzini
2013-09-13 9:29 ` Peter Lieven
0 siblings, 1 reply; 56+ messages in thread
From: Paolo Bonzini @ 2013-09-13 9:17 UTC (permalink / raw)
To: Peter Lieven; +Cc: Anthony Liguori, Peter Lieven, qemu-devel, Stefan Hajnoczi
Il 13/09/2013 11:14, Peter Lieven ha scritto:
> On 13.09.2013 11:10, Paolo Bonzini wrote:
>> Il 13/09/2013 11:08, Peter Lieven ha scritto:
>>> On 13.09.2013 10:00, Peter Lieven wrote:
>>>> On 06.09.2013 17:39, Stefan Hajnoczi wrote:
>>>>> From: Paolo Bonzini <pbonzini@redhat.com>
>>>>>
>>>>> Reviewed-by: Eric Blake <eblake@redhat.com>
>>>>> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
>>>>> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
>>>>> ---
>>>>> block.c | 16 +++++++++++++++-
>>>>> 1 file changed, 15 insertions(+), 1 deletion(-)
>>>>>
>>>>> diff --git a/block.c b/block.c
>>>>> index 3c39769..a325efc 100644
>>>>> --- a/block.c
>>>>> +++ b/block.c
>>>>> @@ -3075,7 +3075,7 @@ static int64_t coroutine_fn
>>>>> bdrv_co_get_block_status(BlockDriverState *bs,
>>>>> {
>>>>> int64_t length;
>>>>> int64_t n;
>>>>> - int64_t ret;
>>>>> + int64_t ret, ret2;
>>>>> length = bdrv_getlength(bs);
>>>>> if (length < 0) {
>>>>> @@ -3117,6 +3117,20 @@ static int64_t coroutine_fn
>>>>> bdrv_co_get_block_status(BlockDriverState *bs,
>>>>> }
>>>>> }
>>>>> }
>>>>> +
>>>>> + if (bs->file &&
>>>>> + (ret & BDRV_BLOCK_DATA) && !(ret & BDRV_BLOCK_ZERO) &&
>>>>> + (ret & BDRV_BLOCK_OFFSET_VALID)) {
>>>>> + ret2 = bdrv_co_get_block_status(bs->file, ret >>
>>>>> BDRV_SECTOR_BITS,
>>>>> + *pnum, pnum);
>>>>> + if (ret2 >= 0) {
>>>>> + /* Ignore errors. This is just providing extra
>>>>> information, it
>>>>> + * is useful but not necessary.
>>>>> + */
>>>>> + ret |= (ret2 & BDRV_BLOCK_ZERO);
>>>>> + }
>>>>> + }
>>>>> +
>>>>> return ret;
>>>>> }
>>>> for allocated blocks in iscsi this actually leads to 2 call outs to
>>>> iscsi_get_block_status.
>>>>
>>>> because the raw driver passes the get_block_status request to bs->file.
>>>>
>>> correct patch?
>> Correct but a bit hackish... Stefan, Kevin, any ideas?
> add a BDRV_BLOCK_RAW flag to the get_block_status flags?
Perhaps, but then hide it so it's never returned by the block.c
bdrv_get_block_status API.
Paolo
^ permalink raw reply [flat|nested] 56+ messages in thread
* Re: [Qemu-devel] [PULL 39/42] block: look for zero blocks in bs->file
2013-09-13 9:17 ` Paolo Bonzini
@ 2013-09-13 9:29 ` Peter Lieven
0 siblings, 0 replies; 56+ messages in thread
From: Peter Lieven @ 2013-09-13 9:29 UTC (permalink / raw)
To: Paolo Bonzini; +Cc: Anthony Liguori, Peter Lieven, qemu-devel, Stefan Hajnoczi
On 13.09.2013 11:17, Paolo Bonzini wrote:
> Il 13/09/2013 11:14, Peter Lieven ha scritto:
>> On 13.09.2013 11:10, Paolo Bonzini wrote:
>>> Il 13/09/2013 11:08, Peter Lieven ha scritto:
>>>> On 13.09.2013 10:00, Peter Lieven wrote:
>>>>> On 06.09.2013 17:39, Stefan Hajnoczi wrote:
>>>>>> From: Paolo Bonzini <pbonzini@redhat.com>
>>>>>>
>>>>>> Reviewed-by: Eric Blake <eblake@redhat.com>
>>>>>> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
>>>>>> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
>>>>>> ---
>>>>>> block.c | 16 +++++++++++++++-
>>>>>> 1 file changed, 15 insertions(+), 1 deletion(-)
>>>>>>
>>>>>> diff --git a/block.c b/block.c
>>>>>> index 3c39769..a325efc 100644
>>>>>> --- a/block.c
>>>>>> +++ b/block.c
>>>>>> @@ -3075,7 +3075,7 @@ static int64_t coroutine_fn
>>>>>> bdrv_co_get_block_status(BlockDriverState *bs,
>>>>>> {
>>>>>> int64_t length;
>>>>>> int64_t n;
>>>>>> - int64_t ret;
>>>>>> + int64_t ret, ret2;
>>>>>> length = bdrv_getlength(bs);
>>>>>> if (length < 0) {
>>>>>> @@ -3117,6 +3117,20 @@ static int64_t coroutine_fn
>>>>>> bdrv_co_get_block_status(BlockDriverState *bs,
>>>>>> }
>>>>>> }
>>>>>> }
>>>>>> +
>>>>>> + if (bs->file &&
>>>>>> + (ret & BDRV_BLOCK_DATA) && !(ret & BDRV_BLOCK_ZERO) &&
>>>>>> + (ret & BDRV_BLOCK_OFFSET_VALID)) {
>>>>>> + ret2 = bdrv_co_get_block_status(bs->file, ret >>
>>>>>> BDRV_SECTOR_BITS,
>>>>>> + *pnum, pnum);
>>>>>> + if (ret2 >= 0) {
>>>>>> + /* Ignore errors. This is just providing extra
>>>>>> information, it
>>>>>> + * is useful but not necessary.
>>>>>> + */
>>>>>> + ret |= (ret2 & BDRV_BLOCK_ZERO);
>>>>>> + }
>>>>>> + }
>>>>>> +
>>>>>> return ret;
>>>>>> }
>>>>> for allocated blocks in iscsi this actually leads to 2 call outs to
>>>>> iscsi_get_block_status.
>>>>>
>>>>> because the raw driver passes the get_block_status request to bs->file.
>>>>>
>>>> correct patch?
>>> Correct but a bit hackish... Stefan, Kevin, any ideas?
>> add a BDRV_BLOCK_RAW flag to the get_block_status flags?
> Perhaps, but then hide it so it's never returned by the block.c
> bdrv_get_block_status API.
or directly comparing if the bdrv->drv->format_name is "raw"...
also hackish, but avoids iterating through all drivers.
Peter
^ permalink raw reply [flat|nested] 56+ messages in thread
* Re: [Qemu-devel] [PULL 33/42] block: return BDRV_BLOCK_ZERO past end of backing file
2013-09-13 8:25 ` Paolo Bonzini
@ 2013-09-13 15:20 ` Kevin Wolf
2013-09-16 5:45 ` Peter Lieven
0 siblings, 1 reply; 56+ messages in thread
From: Kevin Wolf @ 2013-09-13 15:20 UTC (permalink / raw)
To: Paolo Bonzini; +Cc: Peter Lieven, Stefan Hajnoczi, qemu-devel, Anthony Liguori
Am 13.09.2013 um 10:25 hat Paolo Bonzini geschrieben:
> Il 13/09/2013 09:33, Peter Lieven ha scritto:
> > On 06.09.2013 17:39, Stefan Hajnoczi wrote:
> >> From: Paolo Bonzini <pbonzini@redhat.com>
> >>
> >> If the sectors are unallocated and we are past the end of the
> >> backing file, they will read as zero.
> >>
> >> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
> >> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
> >> ---
> >> block.c | 12 ++++++++++--
> >> 1 file changed, 10 insertions(+), 2 deletions(-)
> >>
> >> diff --git a/block.c b/block.c
> >> index aa9ec83..82bbd6c 100644
> >> --- a/block.c
> >> +++ b/block.c
> >> @@ -3102,8 +3102,16 @@ static int64_t coroutine_fn
> >> bdrv_co_get_block_status(BlockDriverState *bs,
> >> return ret;
> >> }
> >> - if (!(ret & BDRV_BLOCK_DATA) && bdrv_has_zero_init(bs)) {
> >> - ret |= BDRV_BLOCK_ZERO;
> >> + if (!(ret & BDRV_BLOCK_DATA)) {
> >> + if (bdrv_has_zero_init(bs)) {
> > this should be bdi->discard_zeroes. bdrv_has_zero_init() does only give
> > a valid result
> > right after bdrv_create(). i currently working on extending bdi. I can
> > send a patch for this
> > if you agree.
>
> Yes, please. Right now there is no bdi->discard_zeroes.
If we do this, it needs some function that behaves similar to
bdrv_has_zero_init(); in particular that it returns 0 if there is a
backing file.
Kevin
^ permalink raw reply [flat|nested] 56+ messages in thread
* Re: [Qemu-devel] [PULL 33/42] block: return BDRV_BLOCK_ZERO past end of backing file
2013-09-13 15:20 ` Kevin Wolf
@ 2013-09-16 5:45 ` Peter Lieven
0 siblings, 0 replies; 56+ messages in thread
From: Peter Lieven @ 2013-09-16 5:45 UTC (permalink / raw)
To: Kevin Wolf; +Cc: Paolo Bonzini, Stefan Hajnoczi, qemu-devel, Anthony Liguori
On 13.09.2013 17:20, Kevin Wolf wrote:
> Am 13.09.2013 um 10:25 hat Paolo Bonzini geschrieben:
>> Il 13/09/2013 09:33, Peter Lieven ha scritto:
>>> On 06.09.2013 17:39, Stefan Hajnoczi wrote:
>>>> From: Paolo Bonzini <pbonzini@redhat.com>
>>>>
>>>> If the sectors are unallocated and we are past the end of the
>>>> backing file, they will read as zero.
>>>>
>>>> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
>>>> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
>>>> ---
>>>> block.c | 12 ++++++++++--
>>>> 1 file changed, 10 insertions(+), 2 deletions(-)
>>>>
>>>> diff --git a/block.c b/block.c
>>>> index aa9ec83..82bbd6c 100644
>>>> --- a/block.c
>>>> +++ b/block.c
>>>> @@ -3102,8 +3102,16 @@ static int64_t coroutine_fn
>>>> bdrv_co_get_block_status(BlockDriverState *bs,
>>>> return ret;
>>>> }
>>>> - if (!(ret & BDRV_BLOCK_DATA) && bdrv_has_zero_init(bs)) {
>>>> - ret |= BDRV_BLOCK_ZERO;
>>>> + if (!(ret & BDRV_BLOCK_DATA)) {
>>>> + if (bdrv_has_zero_init(bs)) {
>>> this should be bdi->discard_zeroes. bdrv_has_zero_init() does only give
>>> a valid result
>>> right after bdrv_create(). i currently working on extending bdi. I can
>>> send a patch for this
>>> if you agree.
>> Yes, please. Right now there is no bdi->discard_zeroes.
> If we do this, it needs some function that behaves similar to
> bdrv_has_zero_init(); in particular that it returns 0 if there is a
> backing file.
I will add bdrv_has_discard_zeroes. Would it be ok if it calls out to
bdrv_get_info to get the discard_zeroes information?
Peter
^ permalink raw reply [flat|nested] 56+ messages in thread
end of thread, other threads:[~2013-09-16 5:45 UTC | newest]
Thread overview: 56+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2013-09-06 15:38 [Qemu-devel] [PULL 00/42] Block patches Stefan Hajnoczi
2013-09-06 15:38 ` [Qemu-devel] [PULL 01/42] throttle: Add a new throttling API implementing continuous leaky bucket Stefan Hajnoczi
2013-09-06 15:38 ` [Qemu-devel] [PULL 02/42] throttle: Add units tests Stefan Hajnoczi
2013-09-06 15:38 ` [Qemu-devel] [PULL 03/42] block: Enable the new throttling code in the block layer Stefan Hajnoczi
2013-09-06 15:38 ` [Qemu-devel] [PULL 04/42] block: Add support for throttling burst max in QMP and the command line Stefan Hajnoczi
2013-09-06 15:38 ` [Qemu-devel] [PULL 05/42] block: Add iops_size to do the iops accounting for a given io size Stefan Hajnoczi
2013-09-06 15:38 ` [Qemu-devel] [PULL 06/42] qemu-iotests: Adjust test result 039 Stefan Hajnoczi
2013-09-06 15:38 ` [Qemu-devel] [PULL 07/42] add qemu-img convert -n option (skip target volume creation) Stefan Hajnoczi
2013-09-06 15:38 ` [Qemu-devel] [PULL 08/42] w32: Fix access to host devices (regression) Stefan Hajnoczi
2013-09-06 15:38 ` [Qemu-devel] [PULL 09/42] aio / timers: fix build of test/test-aio.c on non-linux platforms Stefan Hajnoczi
2013-09-06 15:38 ` [Qemu-devel] [PULL 10/42] vvfat: use bdrv_new() to allocate BlockDriverState Stefan Hajnoczi
2013-09-06 15:38 ` [Qemu-devel] [PULL 11/42] iscsi: use bdrv_new() instead of stack structure Stefan Hajnoczi
2013-09-06 15:38 ` [Qemu-devel] [PULL 12/42] block: implement reference count for BlockDriverState Stefan Hajnoczi
2013-09-06 15:38 ` [Qemu-devel] [PULL 13/42] block: make bdrv_delete() static Stefan Hajnoczi
2013-09-06 15:38 ` [Qemu-devel] [PULL 14/42] migration: omit drive ref as we have bdrv_ref now Stefan Hajnoczi
2013-09-06 15:38 ` [Qemu-devel] [PULL 15/42] xen_disk: simplify blk_disconnect with refcnt Stefan Hajnoczi
2013-09-06 15:38 ` [Qemu-devel] [PULL 16/42] nbd: use BlockDriverState refcnt Stefan Hajnoczi
2013-09-06 15:38 ` [Qemu-devel] [PULL 17/42] block: use BDS ref for block jobs Stefan Hajnoczi
2013-09-06 15:38 ` [Qemu-devel] [PULL 18/42] qmp: Documentation for BLOCK_IMAGE_CORRUPTED Stefan Hajnoczi
2013-09-06 15:38 ` [Qemu-devel] [PULL 19/42] cow: make reads go at a decent speed Stefan Hajnoczi
2013-09-06 15:38 ` [Qemu-devel] [PULL 20/42] cow: make writes go at a less indecent speed Stefan Hajnoczi
2013-09-06 15:38 ` [Qemu-devel] [PULL 21/42] cow: do not call bdrv_co_is_allocated Stefan Hajnoczi
2013-09-06 15:38 ` [Qemu-devel] [PULL 22/42] block: keep bs->total_sectors up to date even for growable block devices Stefan Hajnoczi
2013-09-06 15:38 ` [Qemu-devel] [PULL 23/42] block: make bdrv_co_is_allocated static Stefan Hajnoczi
2013-09-06 15:38 ` [Qemu-devel] [PULL 24/42] block: do not use ->total_sectors in bdrv_co_is_allocated Stefan Hajnoczi
2013-09-06 15:38 ` [Qemu-devel] [PULL 25/42] block: remove bdrv_is_allocated_above/bdrv_co_is_allocated_above distinction Stefan Hajnoczi
2013-09-06 15:38 ` [Qemu-devel] [PULL 26/42] block: expect errors from bdrv_co_is_allocated Stefan Hajnoczi
2013-09-06 15:38 ` [Qemu-devel] [PULL 27/42] qemu-img: always probe the input image for allocated sectors Stefan Hajnoczi
2013-09-06 15:38 ` [Qemu-devel] [PULL 28/42] block: make bdrv_has_zero_init return false for copy-on-write-images Stefan Hajnoczi
2013-09-06 15:39 ` [Qemu-devel] [PULL 29/42] block: introduce bdrv_get_block_status API Stefan Hajnoczi
2013-09-06 15:39 ` [Qemu-devel] [PULL 30/42] block: define get_block_status return value Stefan Hajnoczi
2013-09-13 8:04 ` Peter Lieven
2013-09-13 8:26 ` Paolo Bonzini
2013-09-13 8:51 ` Peter Lieven
2013-09-06 15:39 ` [Qemu-devel] [PULL 31/42] block: return get_block_status data and flags for formats Stefan Hajnoczi
2013-09-06 15:39 ` [Qemu-devel] [PULL 32/42] block: use bdrv_has_zero_init to return BDRV_BLOCK_ZERO Stefan Hajnoczi
2013-09-06 15:39 ` [Qemu-devel] [PULL 33/42] block: return BDRV_BLOCK_ZERO past end of backing file Stefan Hajnoczi
2013-09-13 7:33 ` Peter Lieven
2013-09-13 8:25 ` Paolo Bonzini
2013-09-13 15:20 ` Kevin Wolf
2013-09-16 5:45 ` Peter Lieven
2013-09-06 15:39 ` [Qemu-devel] [PULL 34/42] qemu-img: add a "map" subcommand Stefan Hajnoczi
2013-09-06 15:39 ` [Qemu-devel] [PULL 35/42] docs, qapi: document qemu-img map Stefan Hajnoczi
2013-09-06 15:39 ` [Qemu-devel] [PULL 36/42] raw-posix: return get_block_status data and flags Stefan Hajnoczi
2013-09-06 15:39 ` [Qemu-devel] [PULL 37/42] raw-posix: report unwritten extents as zero Stefan Hajnoczi
2013-09-06 15:39 ` [Qemu-devel] [PULL 38/42] block: add default get_block_status implementation for protocols Stefan Hajnoczi
2013-09-06 15:39 ` [Qemu-devel] [PULL 39/42] block: look for zero blocks in bs->file Stefan Hajnoczi
2013-09-13 8:00 ` Peter Lieven
2013-09-13 9:08 ` Peter Lieven
2013-09-13 9:10 ` Paolo Bonzini
2013-09-13 9:14 ` Peter Lieven
2013-09-13 9:17 ` Paolo Bonzini
2013-09-13 9:29 ` Peter Lieven
2013-09-06 15:39 ` [Qemu-devel] [PULL 40/42] dataplane: Fix startup race Stefan Hajnoczi
2013-09-06 15:39 ` [Qemu-devel] [PULL 41/42] qemu-iotests: Whitespace cleanup Stefan Hajnoczi
2013-09-06 15:39 ` [Qemu-devel] [PULL 42/42] qemu-iotests: Fixed test case 026 Stefan Hajnoczi
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