* [Qemu-devel] [PATCH 0/4] block: Avoid copy-on-read assertions
@ 2017-09-30 19:53 Eric Blake
2017-09-30 19:53 ` [Qemu-devel] [PATCH 1/4] qemu-io: Add -C for opening with copy-on-read Eric Blake
` (4 more replies)
0 siblings, 5 replies; 20+ messages in thread
From: Eric Blake @ 2017-09-30 19:53 UTC (permalink / raw)
To: qemu-devel; +Cc: jsnow, kwolf, qemu-block
During my quest to switch block status to be byte-based, John
forced me to evaluate whether we have a situation during
copy-on-read where we could exceed BDRV_REQUEST_MAX_BYTES [1].
Sure enough, we have a number of pre-existing bugs in the
copy-on-read code. Fix those (patch 3), along with adding a
test (patch 4, but needs a couple of additions in patch 1 and
2 to make the test even possible). Swapping patch 3 and 4
demonstrates that the test indeed exposes flaws.
[1] https://lists.gnu.org/archive/html/qemu-devel/2017-09/msg07286.html
Eric Blake (4):
qemu-io: Add -C for opening with copy-on-read
block: Add blkdebug hook for copy-on-read
block: Perform copy-on-read in loop
iotests: Add test 197 for covering copy-on-read
qapi/block-core.json | 5 +-
block/io.c | 118 +++++++++++++++++++++++++++------------
qemu-io.c | 15 ++++-
tests/qemu-iotests/common.filter | 1 +
tests/qemu-iotests/197 | 93 ++++++++++++++++++++++++++++++
tests/qemu-iotests/197.out | 24 ++++++++
tests/qemu-iotests/group | 1 +
7 files changed, 216 insertions(+), 41 deletions(-)
create mode 100755 tests/qemu-iotests/197
create mode 100644 tests/qemu-iotests/197.out
--
2.13.6
^ permalink raw reply [flat|nested] 20+ messages in thread
* [Qemu-devel] [PATCH 1/4] qemu-io: Add -C for opening with copy-on-read
2017-09-30 19:53 [Qemu-devel] [PATCH 0/4] block: Avoid copy-on-read assertions Eric Blake
@ 2017-09-30 19:53 ` Eric Blake
2017-10-01 3:00 ` [Qemu-devel] [Qemu-block] " Jeff Cody
` (3 more replies)
2017-09-30 19:53 ` [Qemu-devel] [PATCH 2/4] block: Add blkdebug hook for copy-on-read Eric Blake
` (3 subsequent siblings)
4 siblings, 4 replies; 20+ messages in thread
From: Eric Blake @ 2017-09-30 19:53 UTC (permalink / raw)
To: qemu-devel; +Cc: jsnow, kwolf, qemu-block, Max Reitz
Make it easier to enable copy-on-read during iotests, by
exposing a new bool option to main and open.
Signed-off-by: Eric Blake <eblake@redhat.com>
---
qemu-io.c | 15 ++++++++++++---
1 file changed, 12 insertions(+), 3 deletions(-)
diff --git a/qemu-io.c b/qemu-io.c
index 265445ad89..c70bde3eb1 100644
--- a/qemu-io.c
+++ b/qemu-io.c
@@ -102,6 +102,7 @@ static void open_help(void)
" Opens a file for subsequent use by all of the other qemu-io commands.\n"
" -r, -- open file read-only\n"
" -s, -- use snapshot file\n"
+" -C, -- use copy-on-read\n"
" -n, -- disable host cache, short for -t none\n"
" -U, -- force shared permissions\n"
" -k, -- use kernel AIO implementation (on Linux only)\n"
@@ -120,7 +121,7 @@ static const cmdinfo_t open_cmd = {
.argmin = 1,
.argmax = -1,
.flags = CMD_NOFILE_OK,
- .args = "[-rsnkU] [-t cache] [-d discard] [-o options] [path]",
+ .args = "[-rsCnkU] [-t cache] [-d discard] [-o options] [path]",
.oneline = "open the file specified by path",
.help = open_help,
};
@@ -145,7 +146,7 @@ static int open_f(BlockBackend *blk, int argc, char **argv)
QDict *opts;
bool force_share = false;
- while ((c = getopt(argc, argv, "snro:kt:d:U")) != -1) {
+ while ((c = getopt(argc, argv, "snCro:kt:d:U")) != -1) {
switch (c) {
case 's':
flags |= BDRV_O_SNAPSHOT;
@@ -154,6 +155,9 @@ static int open_f(BlockBackend *blk, int argc, char **argv)
flags |= BDRV_O_NOCACHE;
writethrough = false;
break;
+ case 'C':
+ flags |= BDRV_O_COPY_ON_READ;
+ break;
case 'r':
readonly = 1;
break;
@@ -251,6 +255,7 @@ static void usage(const char *name)
" -r, --read-only export read-only\n"
" -s, --snapshot use snapshot file\n"
" -n, --nocache disable host cache, short for -t none\n"
+" -C, --copy-on-read enable copy-on-read\n"
" -m, --misalign misalign allocations for O_DIRECT\n"
" -k, --native-aio use kernel AIO implementation (on Linux only)\n"
" -t, --cache=MODE use the given cache mode for the image\n"
@@ -439,7 +444,7 @@ static QemuOptsList file_opts = {
int main(int argc, char **argv)
{
int readonly = 0;
- const char *sopt = "hVc:d:f:rsnmkt:T:U";
+ const char *sopt = "hVc:d:f:rsnCmkt:T:U";
const struct option lopt[] = {
{ "help", no_argument, NULL, 'h' },
{ "version", no_argument, NULL, 'V' },
@@ -448,6 +453,7 @@ int main(int argc, char **argv)
{ "read-only", no_argument, NULL, 'r' },
{ "snapshot", no_argument, NULL, 's' },
{ "nocache", no_argument, NULL, 'n' },
+ { "copy-on-read", no_argument, NULL, 'C' },
{ "misalign", no_argument, NULL, 'm' },
{ "native-aio", no_argument, NULL, 'k' },
{ "discard", required_argument, NULL, 'd' },
@@ -492,6 +498,9 @@ int main(int argc, char **argv)
flags |= BDRV_O_NOCACHE;
writethrough = false;
break;
+ case 'C':
+ flags |= BDRV_O_COPY_ON_READ;
+ break;
case 'd':
if (bdrv_parse_discard_flags(optarg, &flags) < 0) {
error_report("Invalid discard option: %s", optarg);
--
2.13.6
^ permalink raw reply related [flat|nested] 20+ messages in thread
* [Qemu-devel] [PATCH 2/4] block: Add blkdebug hook for copy-on-read
2017-09-30 19:53 [Qemu-devel] [PATCH 0/4] block: Avoid copy-on-read assertions Eric Blake
2017-09-30 19:53 ` [Qemu-devel] [PATCH 1/4] qemu-io: Add -C for opening with copy-on-read Eric Blake
@ 2017-09-30 19:53 ` Eric Blake
2017-10-01 3:00 ` [Qemu-devel] [Qemu-block] " Jeff Cody
` (3 more replies)
2017-09-30 19:53 ` [Qemu-devel] [PATCH 3/4] block: Perform copy-on-read in loop Eric Blake
` (2 subsequent siblings)
4 siblings, 4 replies; 20+ messages in thread
From: Eric Blake @ 2017-09-30 19:53 UTC (permalink / raw)
To: qemu-devel
Cc: jsnow, kwolf, qemu-block, Stefan Hajnoczi, Fam Zheng, Max Reitz,
Markus Armbruster
Make it possible to inject errors on writes performed during a
read operation due to copy-on-read semantics.
Signed-off-by: Eric Blake <eblake@redhat.com>
---
qapi/block-core.json | 5 ++++-
block/io.c | 1 +
2 files changed, 5 insertions(+), 1 deletion(-)
diff --git a/qapi/block-core.json b/qapi/block-core.json
index 750bb0c77c..ab96e348e6 100644
--- a/qapi/block-core.json
+++ b/qapi/block-core.json
@@ -2538,6 +2538,8 @@
#
# @l1_shrink_free_l2_clusters: discard the l2 tables. (since 2.11)
#
+# @cor_write: a write due to copy-on-read (since 2.11)
+#
# Since: 2.9
##
{ 'enum': 'BlkdebugEvent', 'prefix': 'BLKDBG',
@@ -2555,7 +2557,8 @@
'flush_to_disk', 'pwritev_rmw_head', 'pwritev_rmw_after_head',
'pwritev_rmw_tail', 'pwritev_rmw_after_tail', 'pwritev',
'pwritev_zero', 'pwritev_done', 'empty_image_prepare',
- 'l1_shrink_write_table', 'l1_shrink_free_l2_clusters' ] }
+ 'l1_shrink_write_table', 'l1_shrink_free_l2_clusters',
+ 'cor_write'] }
##
# @BlkdebugInjectErrorOptions:
diff --git a/block/io.c b/block/io.c
index d633b0f851..97d9fa655d 100644
--- a/block/io.c
+++ b/block/io.c
@@ -983,6 +983,7 @@ static int coroutine_fn bdrv_co_do_copy_on_readv(BdrvChild *child,
goto err;
}
+ bdrv_debug_event(bs, BLKDBG_COR_WRITE);
if (drv->bdrv_co_pwrite_zeroes &&
buffer_is_zero(bounce_buffer, iov.iov_len)) {
/* FIXME: Should we (perhaps conditionally) be setting
--
2.13.6
^ permalink raw reply related [flat|nested] 20+ messages in thread
* [Qemu-devel] [PATCH 3/4] block: Perform copy-on-read in loop
2017-09-30 19:53 [Qemu-devel] [PATCH 0/4] block: Avoid copy-on-read assertions Eric Blake
2017-09-30 19:53 ` [Qemu-devel] [PATCH 1/4] qemu-io: Add -C for opening with copy-on-read Eric Blake
2017-09-30 19:53 ` [Qemu-devel] [PATCH 2/4] block: Add blkdebug hook for copy-on-read Eric Blake
@ 2017-09-30 19:53 ` Eric Blake
2017-09-30 20:11 ` [Qemu-devel] [PATCH 4/4] iotests: Add test 197 for covering copy-on-read Eric Blake
2017-09-30 21:19 ` [Qemu-devel] [PATCH 0/4] block: Avoid copy-on-read assertions no-reply
4 siblings, 0 replies; 20+ messages in thread
From: Eric Blake @ 2017-09-30 19:53 UTC (permalink / raw)
To: qemu-devel
Cc: jsnow, kwolf, qemu-block, qemu-stable, Stefan Hajnoczi,
Fam Zheng, Max Reitz
Improve our braindead copy-on-read implementation. Pre-patch,
we have multiple issues:
- we create a bounce buffer and perform a write for the entire
request, even if the active image already has 99% of the
clusters occupied, and really only needs to copy-on-read the
remaining 1% of the clusters
- our bounce buffer was as large as the read request, and can
needlessly exhaust our memory by using double the memory of
the request size (the original request plus our bounce buffer),
rather than a capped maximum overhead beyond the original
- if a driver has a max_transfer limit, we are bypassing the
normal code in bdrv_aligned_preadv() that fragments to that
limit, and instead attempt to read the entire buffer from the
driver in one go, which some drivers may assert on
- a client can request a large request of nearly 2G such that
rounding the request out to cluster boundaries results in a
byte count larger than 2G. While this cannot exceed 32 bits,
it DOES have some follow-on problems:
-- the call to bdrv_driver_pread() can assert for exceeding
BDRV_REQUEST_MAX_BYTES, if the driver is old and lacks
.bdrv_co_preadv
-- if the buffer is all zeroes, the subsequent call to
bdrv_co_do_pwrite_zeroes is a no-op due to a negative size,
which means we did not actually copy on read
Fix all of these issues by breaking up the action into a loop,
where each iteration is capped to sane limits. Also, querying
the allocation status allows us to optimize: when data is
already present in the active layer, we don't need to bounce.
Note that the code has a telling comment that copy-on-read
should probably be a filter driver rather than a bolt-in hack
in io.c; but that remains a task for another day.
CC: qemu-stable@nongnu.org
Signed-off-by: Eric Blake <eblake@redhat.com>
---
block/io.c | 119 +++++++++++++++++++++++++++++++++++++++++--------------------
1 file changed, 81 insertions(+), 38 deletions(-)
diff --git a/block/io.c b/block/io.c
index 97d9fa655d..5ef5adc7a7 100644
--- a/block/io.c
+++ b/block/io.c
@@ -34,6 +34,9 @@
#define NOT_DONE 0x7fffffff /* used while emulated sync operation in progress */
+/* Maximum bounce buffer for copy-on-read and write zeroes, in bytes */
+#define MAX_BOUNCE_BUFFER (32768 << BDRV_SECTOR_BITS)
+
static int coroutine_fn bdrv_co_do_pwrite_zeroes(BlockDriverState *bs,
int64_t offset, int bytes, BdrvRequestFlags flags);
@@ -945,11 +948,14 @@ static int coroutine_fn bdrv_co_do_copy_on_readv(BdrvChild *child,
BlockDriver *drv = bs->drv;
struct iovec iov;
- QEMUIOVector bounce_qiov;
+ QEMUIOVector local_qiov;
int64_t cluster_offset;
unsigned int cluster_bytes;
size_t skip_bytes;
int ret;
+ int max_transfer = MIN_NON_ZERO(bs->bl.max_transfer,
+ BDRV_REQUEST_MAX_BYTES);
+ unsigned int progress = 0;
/* FIXME We cannot require callers to have write permissions when all they
* are doing is a read request. If we did things right, write permissions
@@ -961,53 +967,94 @@ static int coroutine_fn bdrv_co_do_copy_on_readv(BdrvChild *child,
// assert(child->perm & (BLK_PERM_WRITE_UNCHANGED | BLK_PERM_WRITE));
/* Cover entire cluster so no additional backing file I/O is required when
- * allocating cluster in the image file.
+ * allocating cluster in the image file. Note that this value may exceed
+ * BDRV_REQUEST_MAX_BYTES (even when the original read did not), which
+ * is one reason we loop rather than doing it all at once.
*/
bdrv_round_to_clusters(bs, offset, bytes, &cluster_offset, &cluster_bytes);
+ skip_bytes = offset - cluster_offset;
trace_bdrv_co_do_copy_on_readv(bs, offset, bytes,
cluster_offset, cluster_bytes);
- iov.iov_len = cluster_bytes;
- iov.iov_base = bounce_buffer = qemu_try_blockalign(bs, iov.iov_len);
+ bounce_buffer = qemu_try_blockalign(bs,
+ MIN(MIN(max_transfer, cluster_bytes),
+ MAX_BOUNCE_BUFFER));
if (bounce_buffer == NULL) {
ret = -ENOMEM;
goto err;
}
- qemu_iovec_init_external(&bounce_qiov, &iov, 1);
+ while (cluster_bytes) {
+ int64_t pnum;
- ret = bdrv_driver_preadv(bs, cluster_offset, cluster_bytes,
- &bounce_qiov, 0);
- if (ret < 0) {
- goto err;
- }
+ ret = bdrv_is_allocated(bs, cluster_offset,
+ MIN(cluster_bytes, max_transfer), &pnum);
+ if (ret < 0) {
+ /* Safe to treat errors in querying allocation as if
+ * unallocated; we'll probably fail again soon on the
+ * read, but at least that will set a decent errno.
+ */
+ pnum = MIN(cluster_bytes, max_transfer);
+ }
- bdrv_debug_event(bs, BLKDBG_COR_WRITE);
- if (drv->bdrv_co_pwrite_zeroes &&
- buffer_is_zero(bounce_buffer, iov.iov_len)) {
- /* FIXME: Should we (perhaps conditionally) be setting
- * BDRV_REQ_MAY_UNMAP, if it will allow for a sparser copy
- * that still correctly reads as zero? */
- ret = bdrv_co_do_pwrite_zeroes(bs, cluster_offset, cluster_bytes, 0);
- } else {
- /* This does not change the data on the disk, it is not necessary
- * to flush even in cache=writethrough mode.
- */
- ret = bdrv_driver_pwritev(bs, cluster_offset, cluster_bytes,
- &bounce_qiov, 0);
- }
+ assert(skip_bytes < pnum);
- if (ret < 0) {
- /* It might be okay to ignore write errors for guest requests. If this
- * is a deliberate copy-on-read then we don't want to ignore the error.
- * Simply report it in all cases.
- */
- goto err;
- }
+ if (ret <= 0) {
+ /* Must copy-on-read; use the bounce buffer */
+ iov.iov_base = bounce_buffer;
+ iov.iov_len = pnum = MIN(pnum, MAX_BOUNCE_BUFFER);
+ qemu_iovec_init_external(&local_qiov, &iov, 1);
+
+ ret = bdrv_driver_preadv(bs, cluster_offset, pnum,
+ &local_qiov, 0);
+ if (ret < 0) {
+ goto err;
+ }
- skip_bytes = offset - cluster_offset;
- qemu_iovec_from_buf(qiov, 0, bounce_buffer + skip_bytes, bytes);
+ bdrv_debug_event(bs, BLKDBG_COR_WRITE);
+ if (drv->bdrv_co_pwrite_zeroes &&
+ buffer_is_zero(bounce_buffer, pnum)) {
+ /* FIXME: Should we (perhaps conditionally) be setting
+ * BDRV_REQ_MAY_UNMAP, if it will allow for a sparser copy
+ * that still correctly reads as zero? */
+ ret = bdrv_co_do_pwrite_zeroes(bs, cluster_offset, pnum, 0);
+ } else {
+ /* This does not change the data on the disk, it is not
+ * necessary to flush even in cache=writethrough mode.
+ */
+ ret = bdrv_driver_pwritev(bs, cluster_offset, pnum,
+ &local_qiov, 0);
+ }
+
+ if (ret < 0) {
+ /* It might be okay to ignore write errors for guest
+ * requests. If this is a deliberate copy-on-read
+ * then we don't want to ignore the error. Simply
+ * report it in all cases.
+ */
+ goto err;
+ }
+
+ qemu_iovec_from_buf(qiov, progress, bounce_buffer + skip_bytes,
+ pnum - skip_bytes);
+ } else {
+ /* Read directly into the destination */
+ qemu_iovec_init(&local_qiov, qiov->niov);
+ qemu_iovec_concat(&local_qiov, qiov, progress, pnum - skip_bytes);
+ ret = bdrv_driver_preadv(bs, offset + progress, local_qiov.size,
+ &local_qiov, 0);
+ qemu_iovec_destroy(&local_qiov);
+ if (ret < 0) {
+ goto err;
+ }
+ }
+
+ cluster_offset += pnum;
+ cluster_bytes -= pnum;
+ progress += pnum - skip_bytes;
+ skip_bytes = 0;
+ }
err:
qemu_vfree(bounce_buffer);
@@ -1213,9 +1260,6 @@ int coroutine_fn bdrv_co_readv(BdrvChild *child, int64_t sector_num,
return bdrv_co_do_readv(child, sector_num, nb_sectors, qiov, 0);
}
-/* Maximum buffer for write zeroes fallback, in bytes */
-#define MAX_WRITE_ZEROES_BOUNCE_BUFFER (32768 << BDRV_SECTOR_BITS)
-
static int coroutine_fn bdrv_co_do_pwrite_zeroes(BlockDriverState *bs,
int64_t offset, int bytes, BdrvRequestFlags flags)
{
@@ -1230,8 +1274,7 @@ static int coroutine_fn bdrv_co_do_pwrite_zeroes(BlockDriverState *bs,
int max_write_zeroes = MIN_NON_ZERO(bs->bl.max_pwrite_zeroes, INT_MAX);
int alignment = MAX(bs->bl.pwrite_zeroes_alignment,
bs->bl.request_alignment);
- int max_transfer = MIN_NON_ZERO(bs->bl.max_transfer,
- MAX_WRITE_ZEROES_BOUNCE_BUFFER);
+ int max_transfer = MIN_NON_ZERO(bs->bl.max_transfer, MAX_BOUNCE_BUFFER);
assert(alignment % bs->bl.request_alignment == 0);
head = offset % alignment;
--
2.13.6
^ permalink raw reply related [flat|nested] 20+ messages in thread
* [Qemu-devel] [PATCH 4/4] iotests: Add test 197 for covering copy-on-read
2017-09-30 19:53 [Qemu-devel] [PATCH 0/4] block: Avoid copy-on-read assertions Eric Blake
` (2 preceding siblings ...)
2017-09-30 19:53 ` [Qemu-devel] [PATCH 3/4] block: Perform copy-on-read in loop Eric Blake
@ 2017-09-30 20:11 ` Eric Blake
2017-10-01 3:03 ` [Qemu-devel] [Qemu-block] " Jeff Cody
2017-09-30 21:19 ` [Qemu-devel] [PATCH 0/4] block: Avoid copy-on-read assertions no-reply
4 siblings, 1 reply; 20+ messages in thread
From: Eric Blake @ 2017-09-30 20:11 UTC (permalink / raw)
To: qemu-devel; +Cc: jsnow, kwolf, qemu-block, Max Reitz
Add a test for qcow2 copy-on-read behavior, including exposure
for the just-fixed bugs.
The copy-on-read behavior is always to a qcow2 image, but the
test is careful to allow running with most image protocol/format
combos as the backing file being copied from (luks being the
exception, as it is harder to pass the right secret to all the
right places). In fact, for './check nbd', this appears to be
the first time we've had a qcow2 image wrapping NBD, requiring
an additional line in _filter_img_create to match the similar
line in _filter_img_info.
Signed-off-by: Eric Blake <eblake@redhat.com>
---
I only tested with -raw, -qcow2, -qed, and -nbd. I won't be
surprised if the test fails in some other setup...
---
tests/qemu-iotests/common.filter | 1 +
tests/qemu-iotests/197 | 93 ++++++++++++++++++++++++++++++++++++++++
tests/qemu-iotests/197.out | 24 +++++++++++
tests/qemu-iotests/group | 1 +
4 files changed, 119 insertions(+)
create mode 100755 tests/qemu-iotests/197
create mode 100644 tests/qemu-iotests/197.out
diff --git a/tests/qemu-iotests/common.filter b/tests/qemu-iotests/common.filter
index 9d5442ecd9..227b37e941 100644
--- a/tests/qemu-iotests/common.filter
+++ b/tests/qemu-iotests/common.filter
@@ -111,6 +111,7 @@ _filter_img_create()
sed -e "s#$IMGPROTO:$TEST_DIR#TEST_DIR#g" \
-e "s#$TEST_DIR#TEST_DIR#g" \
-e "s#$IMGFMT#IMGFMT#g" \
+ -e 's#nbd:127.0.0.1:10810#TEST_DIR/t.IMGFMT#g' \
-e "s# encryption=off##g" \
-e "s# cluster_size=[0-9]\\+##g" \
-e "s# table_size=[0-9]\\+##g" \
diff --git a/tests/qemu-iotests/197 b/tests/qemu-iotests/197
new file mode 100755
index 0000000000..8463e0d1cc
--- /dev/null
+++ b/tests/qemu-iotests/197
@@ -0,0 +1,93 @@
+#!/bin/bash
+#
+# Test case for copy-on-read into qcow2
+#
+# Copyright (C) 2017 Red Hat, Inc.
+#
+# 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=eblake@redhat.com
+
+seq="$(basename $0)"
+echo "QA output created by $seq"
+
+here="$PWD"
+status=1 # failure is the default!
+
+TEST_WRAP="$TEST_DIR/t.wrap.qcow2"
+BLKDBG_CONF="$TEST_DIR/blkdebug.conf"
+
+_cleanup()
+{
+ _cleanup_test_img
+ rm -f "$BLKDBG_CONF"
+}
+trap "_cleanup; exit \$status" 0 1 2 3 15
+
+# get standard environment, filters and checks
+. ./common.rc
+. ./common.filter
+
+# Test is supported for any backing file; but we force qcow2 for our wrapper.
+_supported_fmt generic
+_supported_proto generic
+_supported_os Linux
+# LUKS support may be possible, but it complicates things.
+_unsupported_fmt luks
+
+echo
+echo '=== Copy-on-read ==='
+echo
+
+# Prep the images
+_make_test_img 4G
+$QEMU_IO -c "write -P 55 3G 1k" "$TEST_IMG" | _filter_qemu_io
+IMGPROTO=file IMGFMT=qcow2 IMGOPTS= TEST_IMG_FILE="$TEST_WRAP" \
+ _make_test_img -F "$IMGFMT" -b "$TEST_IMG" | _filter_img_create
+$QEMU_IO -f qcow2 -c "write -z -u 1M 64k" "$TEST_WRAP" | _filter_qemu_io
+
+# Ensure that a read of two clusters, but where one is already allocated,
+# does not re-write the allocated cluster
+cat > "$BLKDBG_CONF" <<EOF
+[inject-error]
+event = "cor_write"
+sector = "2048"
+EOF
+$QEMU_IO -c "open -C \
+ -o driver=blkdebug,config=$BLKDBG_CONF,image.driver=qcow2 $TEST_WRAP" \
+ -c "read -P 0 1M 128k" | _filter_qemu_io
+
+# Read the areas we want copied. The first read is under 2G, but aligned
+# so that rounding to clusters copies more than 2G of zeroes. The second
+# read will pick up the non-zero data in the same cluster
+$QEMU_IO -f qcow2 -C -c "read -P 0 1k $((2*1024*1024*1024 - 512))" \
+ "$TEST_WRAP" | _filter_qemu_io
+$QEMU_IO -f qcow2 -C -c "read -P 0 $((3*1024*1024*1024 + 1024)) 1k" \
+ "$TEST_WRAP" | _filter_qemu_io
+
+# Copy-on-read is incompatible with read-only
+$QEMU_IO -f qcow2 -C -r "$TEST_WRAP" 2>&1 | _filter_testdir
+
+# Break the backing chain, and show that images are identical, and that
+# we properly copied over explicit zeros.
+$QEMU_IMG rebase -u -b "" -f qcow2 "$TEST_WRAP"
+$QEMU_IO -f qcow2 -c map "$TEST_WRAP"
+_check_test_img
+$QEMU_IMG compare -f $IMGFMT -F qcow2 "$TEST_IMG" "$TEST_WRAP"
+
+# success, all done
+echo '*** done'
+status=0
diff --git a/tests/qemu-iotests/197.out b/tests/qemu-iotests/197.out
new file mode 100644
index 0000000000..baaa6b69e4
--- /dev/null
+++ b/tests/qemu-iotests/197.out
@@ -0,0 +1,24 @@
+QA output created by 197
+
+=== Copy-on-read ===
+
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=4294967296
+wrote 1024/1024 bytes at offset 3221225472
+1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+Formatting 'TEST_DIR/t.wrap.IMGFMT', fmt=IMGFMT size=4294967296 backing_file=TEST_DIR/t.IMGFMT backing_fmt=IMGFMT
+wrote 65536/65536 bytes at offset 1048576
+64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 131072/131072 bytes at offset 1048576
+128 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 2147483136/2147483136 bytes at offset 1024
+2 GiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 1024/1024 bytes at offset 3221226496
+1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+can't open device TEST_DIR/t.wrap.qcow2: Can't use copy-on-read on read-only device
+2 GiB (0x80010000) bytes allocated at offset 0 bytes (0x0)
+1023.938 MiB (0x3fff0000) bytes not allocated at offset 2 GiB (0x80010000)
+64 KiB (0x10000) bytes allocated at offset 3 GiB (0xc0000000)
+1023.938 MiB (0x3fff0000) bytes not allocated at offset 3 GiB (0xc0010000)
+No errors were found on the image.
+Images are identical.
+*** done
diff --git a/tests/qemu-iotests/group b/tests/qemu-iotests/group
index cdccee319e..7a302a67cf 100644
--- a/tests/qemu-iotests/group
+++ b/tests/qemu-iotests/group
@@ -191,3 +191,4 @@
192 rw auto quick
194 rw auto migration quick
195 rw auto quick
+197 rw auto quick
--
2.13.6
^ permalink raw reply related [flat|nested] 20+ messages in thread
* Re: [Qemu-devel] [PATCH 0/4] block: Avoid copy-on-read assertions
2017-09-30 19:53 [Qemu-devel] [PATCH 0/4] block: Avoid copy-on-read assertions Eric Blake
` (3 preceding siblings ...)
2017-09-30 20:11 ` [Qemu-devel] [PATCH 4/4] iotests: Add test 197 for covering copy-on-read Eric Blake
@ 2017-09-30 21:19 ` no-reply
2017-09-30 22:05 ` Eric Blake
4 siblings, 1 reply; 20+ messages in thread
From: no-reply @ 2017-09-30 21:19 UTC (permalink / raw)
To: eblake; +Cc: famz, qemu-devel, kwolf, jsnow, qemu-block
Hi,
This series failed build test on s390x host. Please find the details below.
Type: series
Subject: [Qemu-devel] [PATCH 0/4] block: Avoid copy-on-read assertions
Message-id: 20170930195345.23338-1-eblake@redhat.com
=== TEST SCRIPT BEGIN ===
#!/bin/bash
# Testing script will be invoked under the git checkout with
# HEAD pointing to a commit that has the patches applied on top of "base"
# branch
set -e
echo "=== ENV ==="
env
echo "=== PACKAGES ==="
rpm -qa
echo "=== TEST BEGIN ==="
CC=$HOME/bin/cc
INSTALL=$PWD/install
BUILD=$PWD/build
echo -n "Using CC: "
realpath $CC
mkdir -p $BUILD $INSTALL
SRC=$PWD
cd $BUILD
$SRC/configure --cc=$CC --prefix=$INSTALL
make -j4
# XXX: we need reliable clean up
# make check -j4 V=1
make install
=== TEST SCRIPT END ===
Updating 3c8cf5a9c21ff8782164d1def7f44bd888713384
From https://github.com/patchew-project/qemu
* [new tag] patchew/20170930195345.23338-1-eblake@redhat.com -> patchew/20170930195345.23338-1-eblake@redhat.com
Switched to a new branch 'test'
f792305 iotests: Add test 197 for covering copy-on-read
a3bbbb7 block: Perform copy-on-read in loop
08bbf0a block: Add blkdebug hook for copy-on-read
3a580c9 qemu-io: Add -C for opening with copy-on-read
=== OUTPUT BEGIN ===
=== ENV ===
XDG_SESSION_ID=26895
SHELL=/bin/sh
USER=fam
PATCHEW=/home/fam/patchew/patchew-cli -s http://patchew.org --nodebug
PATH=/usr/bin:/bin
PWD=/var/tmp/patchew-tester-tmp-a2p2tpcc/src
LANG=en_US.UTF-8
HOME=/home/fam
SHLVL=2
LOGNAME=fam
DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/1012/bus
XDG_RUNTIME_DIR=/run/user/1012
_=/usr/bin/env
=== PACKAGES ===
gpg-pubkey-873529b8-54e386ff
xz-libs-5.2.2-2.fc24.s390x
libxshmfence-1.2-3.fc24.s390x
giflib-4.1.6-15.fc24.s390x
trousers-lib-0.3.13-6.fc24.s390x
ncurses-base-6.0-6.20160709.fc25.noarch
gmp-6.1.1-1.fc25.s390x
libidn-1.33-1.fc25.s390x
slang-2.3.0-7.fc25.s390x
pkgconfig-0.29.1-1.fc25.s390x
alsa-lib-1.1.1-2.fc25.s390x
yum-metadata-parser-1.1.4-17.fc25.s390x
python3-slip-dbus-0.6.4-4.fc25.noarch
python2-cssselect-0.9.2-1.fc25.noarch
createrepo_c-libs-0.10.0-6.fc25.s390x
initscripts-9.69-1.fc25.s390x
parted-3.2-21.fc25.s390x
flex-2.6.0-3.fc25.s390x
colord-libs-1.3.4-1.fc25.s390x
python-osbs-client-0.33-3.fc25.noarch
perl-Pod-Simple-3.35-1.fc25.noarch
python2-simplejson-3.10.0-1.fc25.s390x
brltty-5.4-2.fc25.s390x
librados2-10.2.4-2.fc25.s390x
tcp_wrappers-7.6-83.fc25.s390x
libcephfs_jni1-10.2.4-2.fc25.s390x
nettle-devel-3.3-1.fc25.s390x
bzip2-devel-1.0.6-21.fc25.s390x
libuuid-2.28.2-2.fc25.s390x
python3-dnf-1.1.10-6.fc25.noarch
texlive-kpathsea-doc-svn41139-33.fc25.1.noarch
openssh-7.4p1-4.fc25.s390x
texlive-kpathsea-bin-svn40473-33.20160520.fc25.1.s390x
texlive-graphics-svn41015-33.fc25.1.noarch
texlive-dvipdfmx-def-svn40328-33.fc25.1.noarch
texlive-mfware-svn40768-33.fc25.1.noarch
texlive-texlive-scripts-svn41433-33.fc25.1.noarch
texlive-euro-svn22191.1.1-33.fc25.1.noarch
texlive-etex-svn37057.0-33.fc25.1.noarch
texlive-iftex-svn29654.0.2-33.fc25.1.noarch
texlive-palatino-svn31835.0-33.fc25.1.noarch
texlive-texlive-docindex-svn41430-33.fc25.1.noarch
texlive-xunicode-svn30466.0.981-33.fc25.1.noarch
texlive-koma-script-svn41508-33.fc25.1.noarch
texlive-pst-grad-svn15878.1.06-33.fc25.1.noarch
texlive-pst-blur-svn15878.2.0-33.fc25.1.noarch
texlive-jknapltx-svn19440.0-33.fc25.1.noarch
texinfo-6.1-4.fc25.s390x
openssl-devel-1.0.2k-1.fc25.s390x
jansson-2.10-2.fc25.s390x
fedora-repos-25-4.noarch
perl-Errno-1.25-387.fc25.s390x
acl-2.2.52-13.fc25.s390x
systemd-pam-231-17.fc25.s390x
NetworkManager-libnm-1.4.4-5.fc25.s390x
poppler-0.45.0-5.fc25.s390x
ccache-3.3.4-1.fc25.s390x
valgrind-3.12.0-9.fc25.s390x
perl-open-1.10-387.fc25.noarch
libgcc-6.4.1-1.fc25.s390x
libsoup-2.56.1-1.fc25.s390x
libstdc++-devel-6.4.1-1.fc25.s390x
libobjc-6.4.1-1.fc25.s390x
python2-rpm-4.13.0.1-2.fc25.s390x
python2-gluster-3.10.5-1.fc25.s390x
rpm-build-4.13.0.1-2.fc25.s390x
glibc-static-2.24-10.fc25.s390x
lz4-1.8.0-1.fc25.s390x
xapian-core-libs-1.2.24-1.fc25.s390x
elfutils-libelf-devel-0.169-1.fc25.s390x
nss-softokn-3.32.0-1.2.fc25.s390x
pango-1.40.9-1.fc25.s390x
glibc-debuginfo-common-2.24-10.fc25.s390x
libaio-0.3.110-6.fc24.s390x
libfontenc-1.1.3-3.fc24.s390x
lzo-2.08-8.fc24.s390x
isl-0.14-5.fc24.s390x
libXau-1.0.8-6.fc24.s390x
linux-atm-libs-2.5.1-14.fc24.s390x
libXext-1.3.3-4.fc24.s390x
libXxf86vm-1.1.4-3.fc24.s390x
bison-3.0.4-4.fc24.s390x
perl-srpm-macros-1-20.fc25.noarch
gawk-4.1.3-8.fc25.s390x
libwayland-client-1.12.0-1.fc25.s390x
perl-Exporter-5.72-366.fc25.noarch
perl-version-0.99.17-1.fc25.s390x
fftw-libs-double-3.3.5-3.fc25.s390x
libssh2-1.8.0-1.fc25.s390x
ModemManager-glib-1.6.4-1.fc25.s390x
newt-python3-0.52.19-2.fc25.s390x
python-munch-2.0.4-3.fc25.noarch
python-bugzilla-1.2.2-4.fc25.noarch
libedit-3.1-16.20160618cvs.fc25.s390x
createrepo_c-0.10.0-6.fc25.s390x
device-mapper-multipath-libs-0.4.9-83.fc25.s390x
yum-3.4.3-510.fc25.noarch
mozjs17-17.0.0-16.fc25.s390x
libselinux-2.5-13.fc25.s390x
python2-pyparsing-2.1.10-1.fc25.noarch
cairo-gobject-1.14.8-1.fc25.s390x
xorg-x11-proto-devel-7.7-20.fc25.noarch
brlapi-0.6.5-2.fc25.s390x
librados-devel-10.2.4-2.fc25.s390x
libXinerama-devel-1.1.3-6.fc24.s390x
lua-posix-33.3.1-3.fc25.s390x
usbredir-devel-0.7.1-2.fc24.s390x
python3-dnf-plugins-core-0.1.21-5.fc25.noarch
texlive-pdftex-doc-svn41149-33.fc25.1.noarch
openssh-clients-7.4p1-4.fc25.s390x
iptables-1.6.0-3.fc25.s390x
texlive-texlive.infra-svn41280-33.fc25.1.noarch
texlive-graphics-cfg-svn40269-33.fc25.1.noarch
texlive-bibtex-svn40768-33.fc25.1.noarch
texlive-mfware-bin-svn40473-33.20160520.fc25.1.s390x
texlive-texlive-scripts-bin-svn29741.0-33.20160520.fc25.1.noarch
texlive-sauerj-svn15878.0-33.fc25.1.noarch
texlive-enctex-svn34957.0-33.fc25.1.noarch
texlive-ifetex-svn24853.1.2-33.fc25.1.noarch
texlive-ntgclass-svn15878.2.1a-33.fc25.1.noarch
texlive-tex-gyre-math-svn41264-33.fc25.1.noarch
texlive-bera-svn20031.0-33.fc25.1.noarch
texlive-ms-svn29849.0-33.fc25.1.noarch
texlive-pst-fill-svn15878.1.01-33.fc25.1.noarch
texlive-ctable-svn38672-33.fc25.1.noarch
texlive-extsizes-svn17263.1.4a-33.fc25.1.noarch
texlive-collection-latexrecommended-svn35765.0-33.20160520.fc25.1.noarch
perl-Filter-1.57-1.fc25.s390x
python2-rpm-macros-3-12.fc25.noarch
gdbm-1.13-1.fc25.s390x
libtasn1-4.12-1.fc25.s390x
fedora-release-25-2.noarch
gdb-headless-7.12.1-48.fc25.s390x
perl-macros-5.24.2-387.fc25.s390x
pcre-devel-8.41-1.fc25.s390x
libX11-1.6.5-1.fc25.s390x
coreutils-8.25-17.fc25.s390x
python2-openidc-client-0-3.20170523git77cb3ee.fc25.noarch
systemtap-client-3.1-5.fc25.s390x
firewalld-0.4.4.5-1.fc25.noarch
glibc-2.24-10.fc25.s390x
libglvnd-egl-0.2.999-24.20170818git8d4d03f.fc25.s390x
libkadm5-1.14.4-8.fc25.s390x
glusterfs-fuse-3.10.5-1.fc25.s390x
libgfortran-6.4.1-1.fc25.s390x
python3-rpm-4.13.0.1-2.fc25.s390x
glusterfs-extra-xlators-3.10.5-1.fc25.s390x
dracut-config-rescue-046-2.git20170811.fc25.s390x
python2-sphinx-theme-alabaster-0.7.9-1.fc25.noarch
elfutils-devel-0.169-1.fc25.s390x
nss-3.32.0-1.1.fc25.s390x
pango-devel-1.40.9-1.fc25.s390x
glibc-debuginfo-2.24-10.fc25.s390x
gpg-pubkey-efe550f5-5220ba41
gpg-pubkey-81b46521-55b3ca9a
filesystem-3.2-37.fc24.s390x
libffi-3.1-9.fc24.s390x
keyutils-libs-1.5.9-8.fc24.s390x
libnfnetlink-1.0.1-8.fc24.s390x
libtheora-1.1.1-14.fc24.s390x
xml-common-0.6.3-44.fc24.noarch
autoconf-2.69-22.fc24.noarch
libXt-1.1.5-3.fc24.s390x
kbd-legacy-2.0.3-3.fc24.noarch
ghostscript-fonts-5.50-35.fc24.noarch
libXevie-1.0.3-11.fc24.s390x
libcap-2.25-2.fc25.s390x
mpfr-3.1.5-1.fc25.s390x
perl-Carp-1.40-365.fc25.noarch
libmnl-1.0.4-1.fc25.s390x
perl-Unicode-EastAsianWidth-1.33-8.fc25.noarch
libwayland-cursor-1.12.0-1.fc25.s390x
python-krbV-1.0.90-12.fc25.s390x
python2-urllib3-1.15.1-3.fc25.noarch
fipscheck-1.4.1-11.fc25.s390x
libndp-1.6-1.fc25.s390x
gnupg2-2.1.13-2.fc25.s390x
libXfixes-5.0.3-1.fc25.s390x
adwaita-icon-theme-3.22.0-1.fc25.noarch
dconf-0.26.0-1.fc25.s390x
ncurses-devel-6.0-6.20160709.fc25.s390x
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device-mapper-1.02.136-3.fc25.s390x
libevent-2.0.22-1.fc25.s390x
atk-devel-2.22.0-1.fc25.s390x
libev-4.24-1.fc25.s390x
xorg-x11-fonts-Type1-7.5-16.fc24.noarch
brlapi-devel-0.6.5-2.fc25.s390x
pulseaudio-libs-10.0-2.fc25.s390x
glib2-2.50.3-1.fc25.s390x
dnf-1.1.10-6.fc25.noarch
texlive-metafont-bin-svn40987-33.20160520.fc25.1.s390x
texlive-xkeyval-svn35741.2.7a-33.fc25.1.noarch
texlive-euler-svn17261.2.5-33.fc25.1.noarch
texlive-mptopdf-svn41282-33.fc25.1.noarch
texlive-wasy-svn35831.0-33.fc25.1.noarch
texlive-avantgar-svn31835.0-33.fc25.1.noarch
texlive-eurosym-svn17265.1.4_subrfix-33.fc25.1.noarch
texlive-knuth-lib-svn35820.0-33.fc25.1.noarch
texlive-parallel-svn15878.0-33.fc25.1.noarch
texlive-texlive-msg-translations-svn41431-33.fc25.1.noarch
texlive-latex-svn40218-33.fc25.1.noarch
texlive-lualatex-math-svn40621-33.fc25.1.noarch
texlive-auto-pst-pdf-svn23723.0.6-33.fc25.1.noarch
texlive-powerdot-svn38984-33.fc25.1.noarch
texlive-wasysym-svn15878.2.0-33.fc25.1.noarch
ImageMagick-libs-6.9.3.0-6.fc25.s390x
geoclue2-2.4.5-1.fc25.s390x
perl-IO-Socket-IP-0.39-1.fc25.noarch
python2-pyasn1-0.2.3-1.fc25.noarch
at-spi2-core-devel-2.22.1-1.fc25.s390x
libacl-2.2.52-13.fc25.s390x
perl-libs-5.24.2-387.fc25.s390x
mesa-libglapi-17.0.5-3.fc25.s390x
python3-rpmconf-1.0.19-1.fc25.noarch
pcre-utf32-8.41-1.fc25.s390x
libX11-common-1.6.5-1.fc25.noarch
coreutils-common-8.25-17.fc25.s390x
mesa-libEGL-17.0.5-3.fc25.s390x
systemtap-runtime-3.1-5.fc25.s390x
NetworkManager-glib-1.4.4-5.fc25.s390x
audit-2.7.7-1.fc25.s390x
glibc-all-langpacks-2.24-10.fc25.s390x
libglvnd-glx-0.2.999-24.20170818git8d4d03f.fc25.s390x
glusterfs-api-3.10.5-1.fc25.s390x
libepoxy-devel-1.4.3-1.fc25.1.s390x
gtk3-3.22.17-2.fc25.s390x
rpm-4.13.0.1-2.fc25.s390x
net-snmp-agent-libs-5.7.3-15.fc25.s390x
pcre2-devel-10.23-9.fc25.s390x
subversion-1.9.7-1.fc25.s390x
libsndfile-1.0.28-6.fc25.s390x
lasi-1.1.2-6.fc24.s390x
python2-snowballstemmer-1.2.1-1.fc25.noarch
nss-util-devel-3.32.0-1.0.fc25.s390x
vim-common-8.0.1030-1.fc25.s390x
gd-2.2.5-1.fc25.s390x
gpg-pubkey-34ec9cba-54e38751
gpg-pubkey-030d5aed-55b577f0
basesystem-11-2.fc24.noarch
libmpc-1.0.2-5.fc24.s390x
libunistring-0.9.4-3.fc24.s390x
libmodman-2.0.1-12.fc24.s390x
lsscsi-0.28-3.fc24.s390x
kbd-misc-2.0.3-3.fc24.noarch
kmod-23-1.fc25.s390x
newt-0.52.19-2.fc25.s390x
perl-Text-Unidecode-1.27-3.fc25.noarch
plymouth-core-libs-0.9.3-0.6.20160620git0e65b86c.fc25.s390x
which-2.21-1.fc25.s390x
python3-slip-0.6.4-4.fc25.noarch
python3-systemd-232-1.fc25.s390x
python-lockfile-0.11.0-4.fc25.noarch
python2-requests-2.10.0-4.fc25.noarch
libnghttp2-1.13.0-2.fc25.s390x
python-urlgrabber-3.10.1-9.fc25.noarch
iputils-20161105-1.fc25.s390x
rest-0.8.0-1.fc25.s390x
adwaita-cursor-theme-3.22.0-1.fc25.noarch
authconfig-6.2.10-14.fc25.s390x
automake-1.15-7.fc25.noarch
shared-mime-info-1.8-1.fc25.s390x
pigz-2.3.4-1.fc25.s390x
device-mapper-libs-1.02.136-3.fc25.s390x
dnsmasq-2.76-2.fc25.s390x
fedora-packager-0.6.0.1-1.fc25.noarch
libwebp-0.5.2-1.fc25.s390x
boost-system-1.60.0-10.fc25.s390x
libasyncns-0.8-10.fc24.s390x
libXau-devel-1.0.8-6.fc24.s390x
libverto-libev-0.2.6-6.fc24.s390x
python3-html5lib-0.999-9.fc25.noarch
ttmkfdir-3.0.9-48.fc24.s390x
pulseaudio-libs-glib2-10.0-2.fc25.s390x
texlive-lib-2016-33.20160520.fc25.s390x
libXi-devel-1.7.9-1.fc25.s390x
python3-distro-1.0.3-1.fc25.noarch
texlive-texlive-common-doc-svn40682-33.fc25.1.noarch
packagedb-cli-2.14.1-1.fc25.noarch
texlive-metafont-svn40793-33.fc25.1.noarch
texlive-tools-svn40934-33.fc25.1.noarch
texlive-enumitem-svn24146.3.5.2-33.fc25.1.noarch
texlive-mptopdf-bin-svn18674.0-33.20160520.fc25.1.noarch
texlive-underscore-svn18261.0-33.fc25.1.noarch
texlive-anysize-svn15878.0-33.fc25.1.noarch
texlive-euenc-svn19795.0.1h-33.fc25.1.noarch
texlive-kastrup-svn15878.0-33.fc25.1.noarch
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texlive-currfile-svn40725-33.fc25.1.noarch
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s390utils-cmsfs-1.36.0-1.fc25.s390x
newt-python-0.52.19-2.fc25.s390x
qt5-srpm-macros-5.7.1-1.fc25.noarch
device-mapper-event-1.02.136-3.fc25.s390x
perl-Class-Inspector-1.31-2.fc25.noarch
libbasicobjects-0.1.1-29.fc25.s390x
libradosstriper1-10.2.4-2.fc25.s390x
libXxf86vm-devel-1.1.4-3.fc24.s390x
zziplib-0.13.62-7.fc24.s390x
libpaper-1.1.24-12.fc24.s390x
libini_config-1.3.0-29.fc25.s390x
snappy-devel-1.1.3-2.fc24.s390x
libcap-ng-devel-0.7.8-1.fc25.s390x
libxkbcommon-devel-0.7.1-1.fc25.s390x
openssl-libs-1.0.2k-1.fc25.s390x
util-linux-2.28.2-2.fc25.s390x
texlive-etoolbox-svn38031.2.2a-33.fc25.1.noarch
texlive-dvips-svn41149-33.fc25.1.noarch
texlive-latexconfig-svn40274-33.fc25.1.noarch
texlive-tex-ini-files-svn40533-33.fc25.1.noarch
texlive-qstest-svn15878.0-33.fc25.1.noarch
texlive-cmap-svn41168-33.fc25.1.noarch
texlive-luatex-bin-svn41091-33.20160520.fc25.1.s390x
texlive-mflogo-svn38628-33.fc25.1.noarch
texlive-sansmath-svn17997.1.1-33.fc25.1.noarch
texlive-unicode-data-svn39808-33.fc25.1.noarch
texlive-luaotfload-bin-svn34647.0-33.20160520.fc25.1.noarch
texlive-listings-svn37534.1.6-33.fc25.1.noarch
texlive-pstricks-svn41321-33.fc25.1.noarch
texlive-metalogo-svn18611.0.12-33.fc25.1.noarch
texlive-collection-latex-svn41011-33.20160520.fc25.1.noarch
python2-dnf-plugins-core-0.1.21-5.fc25.noarch
xkeyboard-config-2.20-2.fc25.noarch
perl-Test-Harness-3.39-1.fc25.noarch
systemd-libs-231-17.fc25.s390x
python3-pycparser-2.14-7.fc25.noarch
kernel-devel-4.11.10-200.fc25.s390x
gsm-1.0.17-1.fc25.s390x
python-2.7.13-2.fc25.s390x
kernel-4.11.10-200.fc25.s390x
rpmconf-1.0.19-1.fc25.noarch
teamd-1.27-1.fc25.s390x
jasper-libs-1.900.13-4.fc25.s390x
glusterfs-libs-3.10.5-1.fc25.s390x
libcrypt-nss-2.24-10.fc25.s390x
emacs-common-25.2-3.fc25.s390x
libcurl-7.51.0-9.fc25.s390x
java-1.8.0-openjdk-1.8.0.144-5.b01.fc25.s390x
gcc-go-6.4.1-1.fc25.s390x
perl-XML-XPath-1.39-2.fc25.noarch
python2-sphinx_rtd_theme-0.1.9-2.fc24.noarch
libxml2-devel-2.9.4-2.fc25.s390x
nss-softokn-devel-3.32.0-1.2.fc25.s390x
nss-devel-3.32.0-1.1.fc25.s390x
libattr-2.4.47-16.fc24.s390x
libvisual-0.4.0-20.fc24.s390x
libpcap-1.7.4-2.fc24.s390x
libutempter-1.1.6-8.fc24.s390x
libgudev-230-3.fc24.s390x
popt-devel-1.16-7.fc24.s390x
hicolor-icon-theme-0.15-3.fc24.noarch
setup-2.10.4-1.fc25.noarch
bash-4.3.43-4.fc25.s390x
libjpeg-turbo-1.5.1-0.fc25.s390x
perl-Socket-2.024-1.fc25.s390x
perl-HTTP-Tiny-0.070-1.fc25.noarch
ipset-6.29-1.fc25.s390x
python2-setuptools-25.1.1-1.fc25.noarch
gsettings-desktop-schemas-3.22.0-1.fc25.s390x
python3-setuptools-25.1.1-1.fc25.noarch
python-slip-dbus-0.6.4-4.fc25.noarch
python2-ply-3.8-2.fc25.noarch
dtc-1.4.2-1.fc25.s390x
guile-2.0.13-1.fc25.s390x
cronie-anacron-1.5.1-2.fc25.s390x
libXtst-1.2.3-1.fc25.s390x
iso-codes-3.70-1.fc25.noarch
s390utils-1.36.0-1.fc25.s390x
python-backports-ssl_match_hostname-3.5.0.1-3.fc25.noarch
fedora-cert-0.6.0.1-1.fc25.noarch
dnf-plugin-system-upgrade-0.7.1-4.fc25.noarch
lvm2-2.02.167-3.fc25.s390x
libselinux-devel-2.5-13.fc25.s390x
perl-Time-Local-1.250-1.fc25.noarch
libradosstriper-devel-10.2.4-2.fc25.s390x
flac-libs-1.3.2-1.fc25.s390x
perl-Digest-1.17-366.fc25.noarch
teckit-2.5.1-15.fc24.s390x
libpath_utils-0.2.1-29.fc25.s390x
attr-2.4.47-16.fc24.s390x
usbredir-0.7.1-2.fc24.s390x
cairo-devel-1.14.8-1.fc25.s390x
lzo-devel-2.08-8.fc24.s390x
libcap-devel-2.25-2.fc25.s390x
libbsd-0.8.3-1.fc25.s390x
texlive-url-svn32528.3.4-33.fc25.1.noarch
texlive-dvips-bin-svn40987-33.20160520.fc25.1.s390x
texlive-index-svn24099.4.1beta-33.fc25.1.noarch
texlive-setspace-svn24881.6.7a-33.fc25.1.noarch
texlive-mathtools-svn38833-33.fc25.1.noarch
texlive-cm-svn32865.0-33.fc25.1.noarch
texlive-graphics-def-svn41879-33.fc25.1.noarch
texlive-mdwtools-svn15878.1.05.4-33.fc25.1.noarch
texlive-rsfs-svn15878.0-33.fc25.1.noarch
texlive-ucharcat-svn38907-33.fc25.1.noarch
texlive-fontspec-svn41262-33.fc25.1.noarch
texlive-showexpl-svn32737.v0.3l-33.fc25.1.noarch
texlive-pstricks-add-svn40744-33.fc25.1.noarch
texlive-beamer-svn36461.3.36-33.fc25.1.noarch
texlive-collection-basic-svn41149-33.20160520.fc25.1.noarch
xemacs-filesystem-21.5.34-20.20170124hgf412e9f093d4.fc25.noarch
hawkey-0.6.4-3.fc25.s390x
bluez-libs-5.44-1.fc25.s390x
audit-libs-2.7.7-1.fc25.s390x
iproute-4.11.0-1.fc25.s390x
libICE-1.0.9-9.fc25.s390x
python3-ply-3.8-2.fc25.noarch
perl-5.24.2-387.fc25.s390x
graphite2-1.3.10-1.fc25.s390x
vte-profile-0.46.2-1.fc25.s390x
python-libs-2.7.13-2.fc25.s390x
mesa-libGL-17.0.5-3.fc25.s390x
python2-pycurl-7.43.0-6.fc25.s390x
NetworkManager-1.4.4-5.fc25.s390x
mesa-libEGL-devel-17.0.5-3.fc25.s390x
mesa-libGLES-devel-17.0.5-3.fc25.s390x
hostname-3.15-8.fc25.s390x
glibc-headers-2.24-10.fc25.s390x
glusterfs-cli-3.10.5-1.fc25.s390x
git-core-2.9.5-1.fc25.s390x
mock-1.4.3-1.fc25.noarch
gcc-gfortran-6.4.1-1.fc25.s390x
webkitgtk4-plugin-process-gtk2-2.16.6-1.fc25.s390x
perl-Module-CoreList-5.20170821-1.fc25.noarch
python2-pbr-1.10.0-1.fc25.noarch
libtool-2.4.6-14.fc25.s390x
gnutls-dane-3.5.15-1.fc25.s390x
kernel-4.12.11-200.fc25.s390x
gpg-pubkey-a0a7badb-52844296
readline-6.3-8.fc24.s390x
cpio-2.12-3.fc24.s390x
libXcomposite-0.4.4-8.fc24.s390x
procps-ng-3.3.10-11.fc24.s390x
GConf2-3.2.6-16.fc24.s390x
xz-devel-5.2.2-2.fc24.s390x
fedora-logos-22.0.0-3.fc24.s390x
gpg-pubkey-e372e838-56fd7943
kmod-libs-23-1.fc25.s390x
perl-parent-0.236-1.fc25.noarch
perl-TermReadKey-2.37-1.fc25.s390x
ncurses-c++-libs-6.0-6.20160709.fc25.s390x
gzip-1.8-1.fc25.s390x
python3-gobject-base-3.22.0-1.fc25.s390x
python2-yubico-1.3.2-3.fc25.noarch
s390utils-ziomon-1.36.0-1.fc25.s390x
librepo-1.7.18-3.fc25.s390x
gnat-srpm-macros-4-1.fc25.noarch
python-decoratortools-1.8-12.fc25.noarch
m17n-db-1.7.0-7.fc25.noarch
e2fsprogs-libs-1.43.3-1.fc25.s390x
libvorbis-1.3.5-1.fc25.s390x
npth-1.3-1.fc25.s390x
libcephfs1-10.2.4-2.fc25.s390x
wayland-devel-1.12.0-1.fc25.s390x
libxcb-devel-1.12-1.fc25.s390x
perl-encoding-2.19-5.fc25.s390x
python3-cssselect-0.9.2-1.fc25.noarch
gettext-libs-0.19.8.1-3.fc25.s390x
at-spi2-atk-devel-2.22.0-1.fc25.s390x
virglrenderer-0.5.0-1.20160411git61846f92f.fc25.s390x
pixman-devel-0.34.0-2.fc24.s390x
libnfs-devel-1.9.8-2.fc24.s390x
libblkid-2.28.2-2.fc25.s390x
glib2-devel-2.50.3-1.fc25.s390x
texlive-ifxetex-svn19685.0.5-33.fc25.1.noarch
texlive-caption-svn41409-33.fc25.1.noarch
texlive-float-svn15878.1.3d-33.fc25.1.noarch
texlive-pdftex-def-svn22653.0.06d-33.fc25.1.noarch
texlive-xdvi-bin-svn40750-33.20160520.fc25.1.s390x
texlive-beton-svn15878.0-33.fc25.1.noarch
texlive-filecontents-svn24250.1.3-33.fc25.1.noarch
texlive-lm-math-svn36915.1.959-33.fc25.1.noarch
texlive-pslatex-svn16416.0-33.fc25.1.noarch
texlive-times-svn35058.0-33.fc25.1.noarch
texlive-breakurl-svn29901.1.40-33.fc25.1.noarch
texlive-filehook-svn24280.0.5d-33.fc25.1.noarch
texlive-pst-pdf-svn31660.1.1v-33.fc25.1.noarch
texlive-seminar-svn34011.1.62-33.fc25.1.noarch
texlive-xetexconfig-svn41133-33.fc25.1.noarch
python-rpm-macros-3-12.fc25.noarch
nss-pem-1.0.3-3.fc25.s390x
at-spi2-core-2.22.1-1.fc25.s390x
perl-Scalar-List-Utils-1.48-1.fc25.s390x
libtasn1-devel-4.12-1.fc25.s390x
python3-koji-1.13.0-2.fc25.noarch
opus-1.1.5-1.fc25.s390x
elfutils-libs-0.169-1.fc25.s390x
kernel-core-4.11.10-200.fc25.s390x
systemd-container-231-17.fc25.s390x
sudo-1.8.20p2-1.fc25.s390x
libicu-devel-57.1-5.fc25.s390x
js-jquery-2.2.4-3.fc25.noarch
krb5-libs-1.14.4-8.fc25.s390x
apr-1.6.2-1.fc25.s390x
dbus-1.11.16-1.fc25.s390x
libdrm-2.4.82-1.fc25.s390x
pcre2-utf32-10.23-9.fc25.s390x
copy-jdk-configs-2.3-1.fc25.noarch
libdrm-devel-2.4.82-1.fc25.s390x
krb5-workstation-1.14.4-8.fc25.s390x
python3-sssdconfig-1.15.3-1.fc25.noarch
python2-docutils-0.13.1-3.fc25.noarch
graphviz-2.38.0-39.fc25.s390x
kernel-modules-4.12.11-200.fc25.s390x
fedpkg-1.29-3.fc25.noarch
=== TEST BEGIN ===
Using CC: /home/fam/bin/cc
Install prefix /var/tmp/patchew-tester-tmp-a2p2tpcc/src/install
BIOS directory /var/tmp/patchew-tester-tmp-a2p2tpcc/src/install/share/qemu
firmware path /var/tmp/patchew-tester-tmp-a2p2tpcc/src/install/share/qemu-firmware
binary directory /var/tmp/patchew-tester-tmp-a2p2tpcc/src/install/bin
library directory /var/tmp/patchew-tester-tmp-a2p2tpcc/src/install/lib
module directory /var/tmp/patchew-tester-tmp-a2p2tpcc/src/install/lib/qemu
libexec directory /var/tmp/patchew-tester-tmp-a2p2tpcc/src/install/libexec
include directory /var/tmp/patchew-tester-tmp-a2p2tpcc/src/install/include
config directory /var/tmp/patchew-tester-tmp-a2p2tpcc/src/install/etc
local state directory /var/tmp/patchew-tester-tmp-a2p2tpcc/src/install/var
Manual directory /var/tmp/patchew-tester-tmp-a2p2tpcc/src/install/share/man
ELF interp prefix /usr/gnemul/qemu-%M
Source path /var/tmp/patchew-tester-tmp-a2p2tpcc/src
C compiler /home/fam/bin/cc
Host C compiler cc
C++ compiler c++
Objective-C compiler /home/fam/bin/cc
ARFLAGS rv
CFLAGS -O2 -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -g
QEMU_CFLAGS -I/usr/include/pixman-1 -Werror -DHAS_LIBSSH2_SFTP_FSYNC -pthread -I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include -DNCURSES_WIDECHAR -D_GNU_SOURCE -m64 -D_GNU_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -Wstrict-prototypes -Wredundant-decls -Wall -Wundef -Wwrite-strings -Wmissing-prototypes -fno-strict-aliasing -fno-common -fwrapv -Wendif-labels -Wno-shift-negative-value -Wno-missing-include-dirs -Wempty-body -Wnested-externs -Wformat-security -Wformat-y2k -Winit-self -Wignored-qualifiers -Wold-style-declaration -Wold-style-definition -Wtype-limits -fstack-protector-strong -I/usr/include/p11-kit-1 -I/usr/include/libpng16 -I/usr/include/libdrm
LDFLAGS -Wl,--warn-common -m64 -g
make make
install install
python python -B
smbd /usr/sbin/smbd
module support no
host CPU s390x
host big endian yes
target list aarch64-softmmu alpha-softmmu arm-softmmu cris-softmmu i386-softmmu lm32-softmmu m68k-softmmu microblazeel-softmmu microblaze-softmmu mips64el-softmmu mips64-softmmu mipsel-softmmu mips-softmmu moxie-softmmu nios2-softmmu or1k-softmmu ppc64-softmmu ppcemb-softmmu ppc-softmmu s390x-softmmu sh4eb-softmmu sh4-softmmu sparc64-softmmu sparc-softmmu tricore-softmmu unicore32-softmmu x86_64-softmmu xtensaeb-softmmu xtensa-softmmu aarch64-linux-user alpha-linux-user armeb-linux-user arm-linux-user cris-linux-user hppa-linux-user i386-linux-user m68k-linux-user microblazeel-linux-user microblaze-linux-user mips64el-linux-user mips64-linux-user mipsel-linux-user mips-linux-user mipsn32el-linux-user mipsn32-linux-user nios2-linux-user or1k-linux-user ppc64abi32-linux-user ppc64le-linux-user ppc64-linux-user ppc-linux-user s390x-linux-user sh4eb-linux-user sh4-linux-user sparc32plus-linux-user sparc64-linux-user sparc-linux-user tilegx-linux-user x86_64-linux-user
gprof enabled no
sparse enabled no
strip binaries yes
profiler no
static build no
SDL support yes (2.0.5)
GTK support yes (3.22.17)
GTK GL support yes
VTE support yes (0.46.2)
TLS priority NORMAL
GNUTLS support yes
GNUTLS rnd yes
libgcrypt no
libgcrypt kdf no
nettle yes (3.3)
nettle kdf yes
libtasn1 yes
curses support yes
virgl support yes
curl support yes
mingw32 support no
Audio drivers oss
Block whitelist (rw)
Block whitelist (ro)
VirtFS support yes
Multipath support no
VNC support yes
VNC SASL support yes
VNC JPEG support yes
VNC PNG support yes
xen support no
brlapi support yes
bluez support yes
Documentation yes
PIE no
vde support no
netmap support no
Linux AIO support yes
ATTR/XATTR support yes
Install blobs yes
KVM support yes
HAX support no
TCG support yes
TCG debug enabled no
TCG interpreter no
RDMA support no
fdt support yes
preadv support yes
fdatasync yes
madvise yes
posix_madvise yes
libcap-ng support yes
vhost-net support yes
vhost-scsi support yes
vhost-vsock support yes
vhost-user support yes
Trace backends log
spice support no
rbd support yes
xfsctl support no
smartcard support yes
libusb yes
usb net redir yes
OpenGL support yes
OpenGL dmabufs yes
libiscsi support yes
libnfs support yes
build guest agent yes
QGA VSS support no
QGA w32 disk info no
QGA MSI support no
seccomp support yes
coroutine backend ucontext
coroutine pool yes
debug stack usage no
crypto afalg no
GlusterFS support yes
gcov gcov
gcov enabled no
TPM support yes
libssh2 support yes
TPM passthrough no
QOM debugging yes
Live block migration yes
lzo support yes
snappy support yes
bzip2 support yes
NUMA host support no
tcmalloc support no
jemalloc support no
avx2 optimization no
replication support yes
VxHS block device no
GEN cris-softmmu/config-devices.mak.tmp
GEN arm-softmmu/config-devices.mak.tmp
GEN alpha-softmmu/config-devices.mak.tmp
GEN aarch64-softmmu/config-devices.mak.tmp
GEN cris-softmmu/config-devices.mak
GEN i386-softmmu/config-devices.mak.tmp
GEN arm-softmmu/config-devices.mak
GEN lm32-softmmu/config-devices.mak.tmp
GEN aarch64-softmmu/config-devices.mak
GEN i386-softmmu/config-devices.mak
GEN m68k-softmmu/config-devices.mak.tmp
GEN m68k-softmmu/config-devices.mak
GEN microblazeel-softmmu/config-devices.mak.tmp
GEN microblaze-softmmu/config-devices.mak.tmp
GEN microblaze-softmmu/config-devices.mak
GEN mips64el-softmmu/config-devices.mak.tmp
GEN alpha-softmmu/config-devices.mak
GEN microblazeel-softmmu/config-devices.mak
GEN mips64-softmmu/config-devices.mak.tmp
GEN mips64-softmmu/config-devices.mak
GEN mipsel-softmmu/config-devices.mak.tmp
GEN mips-softmmu/config-devices.mak.tmp
GEN lm32-softmmu/config-devices.mak
GEN moxie-softmmu/config-devices.mak.tmp
GEN mips64el-softmmu/config-devices.mak
GEN mipsel-softmmu/config-devices.mak
GEN moxie-softmmu/config-devices.mak
GEN nios2-softmmu/config-devices.mak.tmp
GEN mips-softmmu/config-devices.mak
GEN or1k-softmmu/config-devices.mak.tmp
GEN ppc64-softmmu/config-devices.mak.tmp
GEN ppcemb-softmmu/config-devices.mak.tmp
GEN nios2-softmmu/config-devices.mak
GEN ppc-softmmu/config-devices.mak.tmp
GEN or1k-softmmu/config-devices.mak
GEN s390x-softmmu/config-devices.mak.tmp
GEN ppc64-softmmu/config-devices.mak
GEN sh4eb-softmmu/config-devices.mak.tmp
GEN s390x-softmmu/config-devices.mak
GEN sh4-softmmu/config-devices.mak.tmp
GEN ppcemb-softmmu/config-devices.mak
GEN sparc64-softmmu/config-devices.mak.tmp
GEN ppc-softmmu/config-devices.mak
GEN sh4-softmmu/config-devices.mak
GEN sparc-softmmu/config-devices.mak.tmp
GEN sh4eb-softmmu/config-devices.mak
GEN tricore-softmmu/config-devices.mak.tmp
GEN sparc-softmmu/config-devices.mak
GEN tricore-softmmu/config-devices.mak
GEN x86_64-softmmu/config-devices.mak.tmp
GEN sparc64-softmmu/config-devices.mak
GEN unicore32-softmmu/config-devices.mak.tmp
GEN xtensaeb-softmmu/config-devices.mak.tmp
GEN xtensaeb-softmmu/config-devices.mak
GEN aarch64-linux-user/config-devices.mak.tmp
GEN aarch64-linux-user/config-devices.mak
GEN alpha-linux-user/config-devices.mak.tmp
GEN xtensa-softmmu/config-devices.mak.tmp
GEN unicore32-softmmu/config-devices.mak
GEN xtensa-softmmu/config-devices.mak
GEN alpha-linux-user/config-devices.mak
GEN arm-linux-user/config-devices.mak.tmp
GEN cris-linux-user/config-devices.mak.tmp
GEN cris-linux-user/config-devices.mak
GEN hppa-linux-user/config-devices.mak.tmp
GEN armeb-linux-user/config-devices.mak.tmp
GEN x86_64-softmmu/config-devices.mak
GEN i386-linux-user/config-devices.mak.tmp
GEN hppa-linux-user/config-devices.mak
GEN i386-linux-user/config-devices.mak
GEN arm-linux-user/config-devices.mak
GEN m68k-linux-user/config-devices.mak.tmp
GEN microblazeel-linux-user/config-devices.mak.tmp
GEN microblazeel-linux-user/config-devices.mak
GEN microblaze-linux-user/config-devices.mak.tmp
GEN armeb-linux-user/config-devices.mak
GEN mips64el-linux-user/config-devices.mak.tmp
GEN mips64el-linux-user/config-devices.mak
GEN mipsel-linux-user/config-devices.mak.tmp
GEN mips64-linux-user/config-devices.mak.tmp
GEN mipsel-linux-user/config-devices.mak
GEN mips-linux-user/config-devices.mak.tmp
GEN microblaze-linux-user/config-devices.mak
GEN mips-linux-user/config-devices.mak
GEN mipsn32el-linux-user/config-devices.mak.tmp
GEN mipsn32-linux-user/config-devices.mak.tmp
GEN mipsn32-linux-user/config-devices.mak
GEN nios2-linux-user/config-devices.mak.tmp
GEN nios2-linux-user/config-devices.mak
GEN or1k-linux-user/config-devices.mak.tmp
GEN mips64-linux-user/config-devices.mak
GEN mipsn32el-linux-user/config-devices.mak
GEN or1k-linux-user/config-devices.mak
GEN ppc64abi32-linux-user/config-devices.mak.tmp
GEN ppc64abi32-linux-user/config-devices.mak
GEN ppc64le-linux-user/config-devices.mak.tmp
GEN ppc64le-linux-user/config-devices.mak
GEN ppc64-linux-user/config-devices.mak.tmp
GEN m68k-linux-user/config-devices.mak
GEN ppc-linux-user/config-devices.mak.tmp
GEN s390x-linux-user/config-devices.mak.tmp
GEN sh4eb-linux-user/config-devices.mak.tmp
GEN ppc-linux-user/config-devices.mak
GEN sh4-linux-user/config-devices.mak.tmp
GEN ppc64-linux-user/config-devices.mak
GEN s390x-linux-user/config-devices.mak
GEN sparc32plus-linux-user/config-devices.mak.tmp
GEN sparc64-linux-user/config-devices.mak.tmp
GEN sh4eb-linux-user/config-devices.mak
GEN sh4-linux-user/config-devices.mak
GEN sparc-linux-user/config-devices.mak.tmp
GEN tilegx-linux-user/config-devices.mak.tmp
GEN sparc-linux-user/config-devices.mak
GEN tilegx-linux-user/config-devices.mak
GEN x86_64-linux-user/config-devices.mak.tmp
GEN sparc64-linux-user/config-devices.mak
GEN sparc32plus-linux-user/config-devices.mak
GEN config-host.h
GEN qemu-options.def
GEN x86_64-linux-user/config-devices.mak
GEN qmp-commands.h
GEN qapi-types.h
GEN qapi-visit.h
GEN qmp-marshal.c
GEN qapi-event.h
GEN qapi-types.c
GEN qapi-visit.c
GEN qmp-introspect.h
GEN qapi-event.c
GEN qmp-introspect.c
GEN trace/generated-tcg-tracers.h
GEN trace/generated-helpers.h
GEN trace/generated-helpers-wrappers.h
GEN trace/generated-helpers.c
GEN module_block.h
GEN tests/test-qapi-visit.h
GEN tests/test-qapi-types.h
GEN tests/test-qmp-commands.h
GEN tests/test-qapi-event.h
GEN trace-root.h
GEN tests/test-qmp-introspect.h
GEN util/trace.h
GEN crypto/trace.h
GEN io/trace.h
GEN migration/trace.h
GEN block/trace.h
GEN chardev/trace.h
GEN hw/block/trace.h
GEN hw/block/dataplane/trace.h
GEN hw/char/trace.h
GEN hw/intc/trace.h
GEN hw/net/trace.h
GEN hw/virtio/trace.h
GEN hw/audio/trace.h
GEN hw/usb/trace.h
GEN hw/misc/trace.h
GEN hw/scsi/trace.h
GEN hw/nvram/trace.h
GEN hw/display/trace.h
GEN hw/input/trace.h
GEN hw/timer/trace.h
GEN hw/dma/trace.h
GEN hw/sparc/trace.h
GEN hw/sd/trace.h
GEN hw/isa/trace.h
GEN hw/mem/trace.h
GEN hw/i386/trace.h
GEN hw/i386/xen/trace.h
GEN hw/ppc/trace.h
GEN hw/pci/trace.h
GEN hw/s390x/trace.h
GEN hw/vfio/trace.h
GEN hw/9pfs/trace.h
GEN hw/acpi/trace.h
GEN hw/arm/trace.h
GEN hw/alpha/trace.h
GEN hw/ide/trace.h
GEN ui/trace.h
GEN hw/xen/trace.h
GEN audio/trace.h
GEN net/trace.h
GEN target/arm/trace.h
GEN target/i386/trace.h
GEN target/mips/trace.h
GEN target/sparc/trace.h
GEN target/s390x/trace.h
GEN target/ppc/trace.h
GEN qom/trace.h
GEN linux-user/trace.h
GEN qapi/trace.h
GEN accel/tcg/trace.h
GEN accel/kvm/trace.h
GEN nbd/trace.h
GEN trace-root.c
GEN scsi/trace.h
GEN util/trace.c
GEN crypto/trace.c
GEN io/trace.c
GEN migration/trace.c
GEN block/trace.c
GEN chardev/trace.c
GEN hw/block/trace.c
GEN hw/block/dataplane/trace.c
GEN hw/char/trace.c
GEN hw/intc/trace.c
GEN hw/net/trace.c
GEN hw/virtio/trace.c
GEN hw/audio/trace.c
GEN hw/misc/trace.c
GEN hw/usb/trace.c
GEN hw/scsi/trace.c
GEN hw/nvram/trace.c
GEN hw/display/trace.c
GEN hw/input/trace.c
GEN hw/timer/trace.c
GEN hw/dma/trace.c
GEN hw/sparc/trace.c
GEN hw/isa/trace.c
GEN hw/sd/trace.c
GEN hw/mem/trace.c
GEN hw/i386/trace.c
GEN hw/i386/xen/trace.c
GEN hw/9pfs/trace.c
GEN hw/ppc/trace.c
GEN hw/pci/trace.c
GEN hw/s390x/trace.c
GEN hw/vfio/trace.c
GEN hw/acpi/trace.c
GEN hw/arm/trace.c
GEN hw/alpha/trace.c
GEN hw/xen/trace.c
GEN hw/ide/trace.c
GEN ui/trace.c
GEN audio/trace.c
GEN net/trace.c
GEN target/arm/trace.c
GEN target/i386/trace.c
GEN target/mips/trace.c
GEN target/sparc/trace.c
GEN target/s390x/trace.c
GEN target/ppc/trace.c
GEN qom/trace.c
GEN linux-user/trace.c
GEN qapi/trace.c
GEN accel/tcg/trace.c
GEN accel/kvm/trace.c
GEN nbd/trace.c
GEN scsi/trace.c
GEN config-all-devices.mak
GEN qemu-monitor.texi
GEN qemu-options.texi
CC tests/qemu-iotests/socket_scm_helper.o
GEN docs/version.texi
GEN qemu-img-cmds.texi
GEN qemu-monitor-info.texi
GEN qemu-img.1
GEN qemu-nbd.8
GEN qemu-ga.8
GEN docs/interop/qemu-qmp-qapi.texi
GEN docs/interop/qemu-ga-qapi.texi
GEN docs/qemu-block-drivers.7
GEN fsdev/virtfs-proxy-helper.1
GEN qga/qapi-generated/qga-qapi-types.h
GEN qga/qapi-generated/qga-qapi-visit.h
GEN qga/qapi-generated/qga-qmp-commands.h
GEN qga/qapi-generated/qga-qapi-types.c
GEN qga/qapi-generated/qga-qmp-marshal.c
GEN qga/qapi-generated/qga-qapi-visit.c
CC qmp-introspect.o
CC qapi-types.o
CC qapi-visit.o
CC qapi-event.o
CC qapi/qapi-visit-core.o
CC qapi/qapi-dealloc-visitor.o
CC qapi/qobject-input-visitor.o
CC qapi/qobject-output-visitor.o
CC qapi/qmp-registry.o
CC qapi/qmp-dispatch.o
CC qapi/string-input-visitor.o
CC qapi/string-output-visitor.o
CC qapi/opts-visitor.o
CC qapi/qapi-clone-visitor.o
CC qapi/qmp-event.o
CC qapi/qapi-util.o
CC qobject/qnull.o
CC qobject/qnum.o
CC qobject/qstring.o
CC qobject/qdict.o
CC qobject/qlist.o
CC qobject/qbool.o
CC qobject/qlit.o
CC qobject/qjson.o
CC qobject/qobject.o
CC qobject/json-lexer.o
CC qobject/json-streamer.o
CC qobject/json-parser.o
CC trace/control.o
CC trace/qmp.o
CC util/osdep.o
CC util/cutils.o
CC util/unicode.o
CC util/qemu-timer-common.o
CC util/bufferiszero.o
CC util/lockcnt.o
CC util/aiocb.o
CC util/async.o
CC util/thread-pool.o
CC util/qemu-timer.o
CC util/main-loop.o
CC util/iohandler.o
CC util/aio-posix.o
CC util/compatfd.o
CC util/mmap-alloc.o
CC util/event_notifier-posix.o
CC util/oslib-posix.o
CC util/qemu-openpty.o
CC util/qemu-thread-posix.o
CC util/memfd.o
CC util/envlist.o
CC util/path.o
CC util/host-utils.o
CC util/module.o
CC util/bitmap.o
CC util/bitops.o
CC util/hbitmap.o
CC util/fifo8.o
CC util/acl.o
CC util/cacheinfo.o
CC util/error.o
CC util/qemu-error.o
CC util/iov.o
CC util/id.o
CC util/qemu-config.o
CC util/qemu-sockets.o
CC util/uri.o
CC util/notify.o
CC util/qemu-option.o
CC util/qemu-progress.o
CC util/keyval.o
CC util/hexdump.o
CC util/crc32c.o
CC util/uuid.o
CC util/throttle.o
CC util/getauxval.o
CC util/readline.o
CC util/rcu.o
CC util/qemu-coroutine.o
CC util/qemu-coroutine-lock.o
CC util/qemu-coroutine-io.o
CC util/qemu-coroutine-sleep.o
CC util/coroutine-ucontext.o
CC util/buffer.o
CC util/timed-average.o
CC util/base64.o
CC util/log.o
CC util/qdist.o
CC util/qht.o
CC util/range.o
CC util/stats64.o
CC util/systemd.o
CC trace-root.o
CC util/trace.o
CC crypto/trace.o
CC io/trace.o
CC migration/trace.o
CC block/trace.o
CC chardev/trace.o
CC hw/block/trace.o
CC hw/block/dataplane/trace.o
CC hw/char/trace.o
CC hw/intc/trace.o
CC hw/net/trace.o
CC hw/virtio/trace.o
CC hw/audio/trace.o
CC hw/misc/trace.o
CC hw/usb/trace.o
CC hw/scsi/trace.o
CC hw/display/trace.o
CC hw/nvram/trace.o
CC hw/input/trace.o
CC hw/timer/trace.o
CC hw/dma/trace.o
CC hw/sparc/trace.o
CC hw/sd/trace.o
CC hw/isa/trace.o
CC hw/mem/trace.o
CC hw/i386/trace.o
CC hw/i386/xen/trace.o
CC hw/9pfs/trace.o
CC hw/ppc/trace.o
CC hw/pci/trace.o
CC hw/s390x/trace.o
CC hw/vfio/trace.o
CC hw/acpi/trace.o
CC hw/arm/trace.o
CC hw/alpha/trace.o
CC hw/xen/trace.o
CC hw/ide/trace.o
CC ui/trace.o
CC audio/trace.o
CC net/trace.o
CC target/arm/trace.o
CC target/i386/trace.o
CC target/mips/trace.o
CC target/sparc/trace.o
CC target/s390x/trace.o
CC target/ppc/trace.o
CC qom/trace.o
CC linux-user/trace.o
CC qapi/trace.o
CC accel/tcg/trace.o
CC accel/kvm/trace.o
CC nbd/trace.o
CC scsi/trace.o
CC crypto/pbkdf-stub.o
CC stubs/arch-query-cpu-def.o
CC stubs/arch-query-cpu-model-comparison.o
CC stubs/arch-query-cpu-model-expansion.o
CC stubs/arch-query-cpu-model-baseline.o
CC stubs/bdrv-next-monitor-owned.o
CC stubs/blockdev-close-all-bdrv-states.o
CC stubs/blk-commit-all.o
CC stubs/clock-warp.o
CC stubs/cpu-get-clock.o
CC stubs/cpu-get-icount.o
CC stubs/dump.o
CC stubs/fdset.o
CC stubs/error-printf.o
CC stubs/gdbstub.o
CC stubs/get-vm-name.o
CC stubs/iothread.o
CC stubs/iothread-lock.o
CC stubs/is-daemonized.o
CC stubs/linux-aio.o
CC stubs/machine-init-done.o
CC stubs/migr-blocker.o
CC stubs/change-state-handler.o
CC stubs/notify-event.o
CC stubs/monitor.o
CC stubs/qtest.o
CC stubs/replay.o
CC stubs/runstate-check.o
CC stubs/slirp.o
CC stubs/set-fd-handler.o
CC stubs/sysbus.o
CC stubs/trace-control.o
CC stubs/uuid.o
CC stubs/vm-stop.o
CC stubs/vmstate.o
CC stubs/qmp_pc_dimm.o
CC stubs/target-monitor-defs.o
CC stubs/target-get-monitor-def.o
CC stubs/pc_madt_cpu_entry.o
CC stubs/vmgenid.o
CC stubs/xen-common.o
CC stubs/xen-hvm.o
CC stubs/pci-host-piix.o
CC contrib/ivshmem-client/main.o
CC contrib/ivshmem-client/ivshmem-client.o
CC contrib/ivshmem-server/ivshmem-server.o
CC contrib/ivshmem-server/main.o
CC qemu-nbd.o
CC block.o
CC blockjob.o
CC qemu-io-cmds.o
CC replication.o
CC block/raw-format.o
CC block/qcow.o
CC block/vdi.o
CC block/vmdk.o
CC block/cloop.o
CC block/vpc.o
CC block/bochs.o
CC block/vvfat.o
CC block/dmg.o
CC block/qcow2.o
CC block/qcow2-refcount.o
CC block/qcow2-cluster.o
CC block/qcow2-snapshot.o
CC block/qcow2-cache.o
CC block/qcow2-bitmap.o
CC block/qed.o
CC block/qed-l2-cache.o
CC block/qed-table.o
CC block/qed-cluster.o
CC block/qed-check.o
CC block/vhdx.o
CC block/vhdx-endian.o
CC block/vhdx-log.o
CC block/quorum.o
CC block/parallels.o
CC block/blkdebug.o
CC block/blkverify.o
CC block/blkreplay.o
CC block/block-backend.o
CC block/snapshot.o
CC block/qapi.o
CC block/file-posix.o
CC block/linux-aio.o
CC block/null.o
CC block/mirror.o
CC block/commit.o
CC block/io.o
CC block/throttle-groups.o
CC block/nbd.o
CC block/nbd-client.o
CC block/sheepdog.o
CC block/iscsi-opts.o
CC block/accounting.o
/var/tmp/patchew-tester-tmp-a2p2tpcc/src/block/io.c: In function ‘bdrv_aligned_preadv’:
/var/tmp/patchew-tester-tmp-a2p2tpcc/src/block/io.c:955:9: error: ‘ret’ may be used uninitialized in this function [-Werror=maybe-uninitialized]
int ret;
^~~
cc1: all warnings being treated as errors
/var/tmp/patchew-tester-tmp-a2p2tpcc/src/rules.mak:66: recipe for target 'block/io.o' failed
make: *** [block/io.o] Error 1
make: *** Waiting for unfinished jobs....
CC block/dirty-bitmap.o
=== OUTPUT END ===
Test command exited with code: 2
---
Email generated automatically by Patchew [http://patchew.org/].
Please send your feedback to patchew-devel@freelists.org
^ permalink raw reply [flat|nested] 20+ messages in thread
* Re: [Qemu-devel] [PATCH 0/4] block: Avoid copy-on-read assertions
2017-09-30 21:19 ` [Qemu-devel] [PATCH 0/4] block: Avoid copy-on-read assertions no-reply
@ 2017-09-30 22:05 ` Eric Blake
2017-10-02 14:50 ` Kevin Wolf
0 siblings, 1 reply; 20+ messages in thread
From: Eric Blake @ 2017-09-30 22:05 UTC (permalink / raw)
To: qemu-devel; +Cc: famz, kwolf, jsnow, qemu-block
[-- Attachment #1: Type: text/plain, Size: 1764 bytes --]
On 09/30/2017 04:19 PM, no-reply@patchew.org wrote:
> Hi,
>
> This series failed build test on s390x host. Please find the details below.
>
> /var/tmp/patchew-tester-tmp-a2p2tpcc/src/block/io.c: In function ‘bdrv_aligned_preadv’:
> /var/tmp/patchew-tester-tmp-a2p2tpcc/src/block/io.c:955:9: error: ‘ret’ may be used uninitialized in this function [-Werror=maybe-uninitialized]
> int ret;
> ^~~
Blah - I compiled with -g instead of -O2, which masks this warning in my
setup.
The warning is a false negative (the error message is actually pointing
to a line in bdrv_co_do_copy_on_readv - but the compiler must have
inlined it into bdrv_aligned_preadv) - the function is only ever called
with non-zero bytes, and therefore the 'while (cluster_bytes)' loop will
execute at least once, and ret always gets assigned. But the compiler
can't see that, so I'll squash this in:
commit a201636c3133827bd632d5fdd9eb1f5df81d0e0e
Author: Eric Blake <eblake@redhat.com>
Date: Sat Sep 30 14:27:51 2017 -0500
fixup! block: Perform copy-on-read in loop
Signed-off-by: Eric Blake <eblake@redhat.com>
diff --git a/block/io.c b/block/io.c
index 5ef5adc7a7..e7519464bb 100644
--- a/block/io.c
+++ b/block/io.c
@@ -952,7 +952,7 @@ static int coroutine_fn
bdrv_co_do_copy_on_readv(BdrvChild *child,
int64_t cluster_offset;
unsigned int cluster_bytes;
size_t skip_bytes;
- int ret;
+ int ret = 0;
int max_transfer = MIN_NON_ZERO(bs->bl.max_transfer,
BDRV_REQUEST_MAX_BYTES);
unsigned int progress = 0;
--
Eric Blake, Principal Software Engineer
Red Hat, Inc. +1-919-301-3266
Virtualization: qemu.org | libvirt.org
[-- Attachment #2: OpenPGP digital signature --]
[-- Type: application/pgp-signature, Size: 619 bytes --]
^ permalink raw reply related [flat|nested] 20+ messages in thread
* Re: [Qemu-devel] [Qemu-block] [PATCH 1/4] qemu-io: Add -C for opening with copy-on-read
2017-09-30 19:53 ` [Qemu-devel] [PATCH 1/4] qemu-io: Add -C for opening with copy-on-read Eric Blake
@ 2017-10-01 3:00 ` Jeff Cody
2017-10-02 14:52 ` [Qemu-devel] " Kevin Wolf
` (2 subsequent siblings)
3 siblings, 0 replies; 20+ messages in thread
From: Jeff Cody @ 2017-10-01 3:00 UTC (permalink / raw)
To: Eric Blake; +Cc: qemu-devel, kwolf, qemu-block, Max Reitz
On Sat, Sep 30, 2017 at 02:53:42PM -0500, Eric Blake wrote:
> Make it easier to enable copy-on-read during iotests, by
> exposing a new bool option to main and open.
>
> Signed-off-by: Eric Blake <eblake@redhat.com>
> ---
Reviewed-by: Jeff Cody <jcody@redhat.com>
> qemu-io.c | 15 ++++++++++++---
> 1 file changed, 12 insertions(+), 3 deletions(-)
>
> diff --git a/qemu-io.c b/qemu-io.c
> index 265445ad89..c70bde3eb1 100644
> --- a/qemu-io.c
> +++ b/qemu-io.c
> @@ -102,6 +102,7 @@ static void open_help(void)
> " Opens a file for subsequent use by all of the other qemu-io commands.\n"
> " -r, -- open file read-only\n"
> " -s, -- use snapshot file\n"
> +" -C, -- use copy-on-read\n"
> " -n, -- disable host cache, short for -t none\n"
> " -U, -- force shared permissions\n"
> " -k, -- use kernel AIO implementation (on Linux only)\n"
> @@ -120,7 +121,7 @@ static const cmdinfo_t open_cmd = {
> .argmin = 1,
> .argmax = -1,
> .flags = CMD_NOFILE_OK,
> - .args = "[-rsnkU] [-t cache] [-d discard] [-o options] [path]",
> + .args = "[-rsCnkU] [-t cache] [-d discard] [-o options] [path]",
> .oneline = "open the file specified by path",
> .help = open_help,
> };
> @@ -145,7 +146,7 @@ static int open_f(BlockBackend *blk, int argc, char **argv)
> QDict *opts;
> bool force_share = false;
>
> - while ((c = getopt(argc, argv, "snro:kt:d:U")) != -1) {
> + while ((c = getopt(argc, argv, "snCro:kt:d:U")) != -1) {
> switch (c) {
> case 's':
> flags |= BDRV_O_SNAPSHOT;
> @@ -154,6 +155,9 @@ static int open_f(BlockBackend *blk, int argc, char **argv)
> flags |= BDRV_O_NOCACHE;
> writethrough = false;
> break;
> + case 'C':
> + flags |= BDRV_O_COPY_ON_READ;
> + break;
> case 'r':
> readonly = 1;
> break;
> @@ -251,6 +255,7 @@ static void usage(const char *name)
> " -r, --read-only export read-only\n"
> " -s, --snapshot use snapshot file\n"
> " -n, --nocache disable host cache, short for -t none\n"
> +" -C, --copy-on-read enable copy-on-read\n"
> " -m, --misalign misalign allocations for O_DIRECT\n"
> " -k, --native-aio use kernel AIO implementation (on Linux only)\n"
> " -t, --cache=MODE use the given cache mode for the image\n"
> @@ -439,7 +444,7 @@ static QemuOptsList file_opts = {
> int main(int argc, char **argv)
> {
> int readonly = 0;
> - const char *sopt = "hVc:d:f:rsnmkt:T:U";
> + const char *sopt = "hVc:d:f:rsnCmkt:T:U";
> const struct option lopt[] = {
> { "help", no_argument, NULL, 'h' },
> { "version", no_argument, NULL, 'V' },
> @@ -448,6 +453,7 @@ int main(int argc, char **argv)
> { "read-only", no_argument, NULL, 'r' },
> { "snapshot", no_argument, NULL, 's' },
> { "nocache", no_argument, NULL, 'n' },
> + { "copy-on-read", no_argument, NULL, 'C' },
> { "misalign", no_argument, NULL, 'm' },
> { "native-aio", no_argument, NULL, 'k' },
> { "discard", required_argument, NULL, 'd' },
> @@ -492,6 +498,9 @@ int main(int argc, char **argv)
> flags |= BDRV_O_NOCACHE;
> writethrough = false;
> break;
> + case 'C':
> + flags |= BDRV_O_COPY_ON_READ;
> + break;
> case 'd':
> if (bdrv_parse_discard_flags(optarg, &flags) < 0) {
> error_report("Invalid discard option: %s", optarg);
> --
> 2.13.6
>
>
^ permalink raw reply [flat|nested] 20+ messages in thread
* Re: [Qemu-devel] [Qemu-block] [PATCH 2/4] block: Add blkdebug hook for copy-on-read
2017-09-30 19:53 ` [Qemu-devel] [PATCH 2/4] block: Add blkdebug hook for copy-on-read Eric Blake
@ 2017-10-01 3:00 ` Jeff Cody
2017-10-02 14:52 ` [Qemu-devel] " Kevin Wolf
` (2 subsequent siblings)
3 siblings, 0 replies; 20+ messages in thread
From: Jeff Cody @ 2017-10-01 3:00 UTC (permalink / raw)
To: Eric Blake
Cc: qemu-devel, kwolf, Fam Zheng, qemu-block, Markus Armbruster,
Max Reitz, Stefan Hajnoczi
On Sat, Sep 30, 2017 at 02:53:43PM -0500, Eric Blake wrote:
> Make it possible to inject errors on writes performed during a
> read operation due to copy-on-read semantics.
>
> Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Jeff Cody <jcody@redhat.com>
> ---
> qapi/block-core.json | 5 ++++-
> block/io.c | 1 +
> 2 files changed, 5 insertions(+), 1 deletion(-)
>
> diff --git a/qapi/block-core.json b/qapi/block-core.json
> index 750bb0c77c..ab96e348e6 100644
> --- a/qapi/block-core.json
> +++ b/qapi/block-core.json
> @@ -2538,6 +2538,8 @@
> #
> # @l1_shrink_free_l2_clusters: discard the l2 tables. (since 2.11)
> #
> +# @cor_write: a write due to copy-on-read (since 2.11)
> +#
> # Since: 2.9
> ##
> { 'enum': 'BlkdebugEvent', 'prefix': 'BLKDBG',
> @@ -2555,7 +2557,8 @@
> 'flush_to_disk', 'pwritev_rmw_head', 'pwritev_rmw_after_head',
> 'pwritev_rmw_tail', 'pwritev_rmw_after_tail', 'pwritev',
> 'pwritev_zero', 'pwritev_done', 'empty_image_prepare',
> - 'l1_shrink_write_table', 'l1_shrink_free_l2_clusters' ] }
> + 'l1_shrink_write_table', 'l1_shrink_free_l2_clusters',
> + 'cor_write'] }
>
> ##
> # @BlkdebugInjectErrorOptions:
> diff --git a/block/io.c b/block/io.c
> index d633b0f851..97d9fa655d 100644
> --- a/block/io.c
> +++ b/block/io.c
> @@ -983,6 +983,7 @@ static int coroutine_fn bdrv_co_do_copy_on_readv(BdrvChild *child,
> goto err;
> }
>
> + bdrv_debug_event(bs, BLKDBG_COR_WRITE);
> if (drv->bdrv_co_pwrite_zeroes &&
> buffer_is_zero(bounce_buffer, iov.iov_len)) {
> /* FIXME: Should we (perhaps conditionally) be setting
> --
> 2.13.6
>
>
^ permalink raw reply [flat|nested] 20+ messages in thread
* Re: [Qemu-devel] [Qemu-block] [PATCH 4/4] iotests: Add test 197 for covering copy-on-read
2017-09-30 20:11 ` [Qemu-devel] [PATCH 4/4] iotests: Add test 197 for covering copy-on-read Eric Blake
@ 2017-10-01 3:03 ` Jeff Cody
2017-10-02 13:55 ` Eric Blake
0 siblings, 1 reply; 20+ messages in thread
From: Jeff Cody @ 2017-10-01 3:03 UTC (permalink / raw)
To: Eric Blake; +Cc: qemu-devel, kwolf, qemu-block, Max Reitz
On Sat, Sep 30, 2017 at 03:11:21PM -0500, Eric Blake wrote:
> Add a test for qcow2 copy-on-read behavior, including exposure
> for the just-fixed bugs.
>
> The copy-on-read behavior is always to a qcow2 image, but the
> test is careful to allow running with most image protocol/format
> combos as the backing file being copied from (luks being the
> exception, as it is harder to pass the right secret to all the
> right places). In fact, for './check nbd', this appears to be
> the first time we've had a qcow2 image wrapping NBD, requiring
> an additional line in _filter_img_create to match the similar
> line in _filter_img_info.
>
> Signed-off-by: Eric Blake <eblake@redhat.com>
>
> ---
> I only tested with -raw, -qcow2, -qed, and -nbd. I won't be
> surprised if the test fails in some other setup...
> ---
> tests/qemu-iotests/common.filter | 1 +
> tests/qemu-iotests/197 | 93 ++++++++++++++++++++++++++++++++++++++++
> tests/qemu-iotests/197.out | 24 +++++++++++
> tests/qemu-iotests/group | 1 +
> 4 files changed, 119 insertions(+)
> create mode 100755 tests/qemu-iotests/197
> create mode 100644 tests/qemu-iotests/197.out
>
> diff --git a/tests/qemu-iotests/common.filter b/tests/qemu-iotests/common.filter
> index 9d5442ecd9..227b37e941 100644
> --- a/tests/qemu-iotests/common.filter
> +++ b/tests/qemu-iotests/common.filter
> @@ -111,6 +111,7 @@ _filter_img_create()
> sed -e "s#$IMGPROTO:$TEST_DIR#TEST_DIR#g" \
> -e "s#$TEST_DIR#TEST_DIR#g" \
> -e "s#$IMGFMT#IMGFMT#g" \
> + -e 's#nbd:127.0.0.1:10810#TEST_DIR/t.IMGFMT#g' \
> -e "s# encryption=off##g" \
> -e "s# cluster_size=[0-9]\\+##g" \
> -e "s# table_size=[0-9]\\+##g" \
> diff --git a/tests/qemu-iotests/197 b/tests/qemu-iotests/197
> new file mode 100755
> index 0000000000..8463e0d1cc
> --- /dev/null
> +++ b/tests/qemu-iotests/197
> @@ -0,0 +1,93 @@
> +#!/bin/bash
> +#
> +# Test case for copy-on-read into qcow2
> +#
> +# Copyright (C) 2017 Red Hat, Inc.
> +#
> +# This program is free software; you can redistribute it and/or modify
> +# it under the terms of the GNU General Public License as published by
> +# the Free Software Foundation; either version 2 of the License, or
> +# (at your option) any later version.
> +#
> +# This program is distributed in the hope that it will be useful,
> +# but WITHOUT ANY WARRANTY; without even the implied warranty of
> +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> +# GNU General Public License for more details.
> +#
> +# You should have received a copy of the GNU General Public License
> +# along with this program. If not, see <http://www.gnu.org/licenses/>.
> +#
> +
> +# creator
> +owner=eblake@redhat.com
> +
> +seq="$(basename $0)"
> +echo "QA output created by $seq"
> +
> +here="$PWD"
> +status=1 # failure is the default!
> +
> +TEST_WRAP="$TEST_DIR/t.wrap.qcow2"
> +BLKDBG_CONF="$TEST_DIR/blkdebug.conf"
> +
> +_cleanup()
> +{
> + _cleanup_test_img
> + rm -f "$BLKDBG_CONF"
> +}
> +trap "_cleanup; exit \$status" 0 1 2 3 15
Note to myself to add this to my iotests series.
> +
> +# get standard environment, filters and checks
> +. ./common.rc
> +. ./common.filter
> +
> +# Test is supported for any backing file; but we force qcow2 for our wrapper.
> +_supported_fmt generic
> +_supported_proto generic
> +_supported_os Linux
> +# LUKS support may be possible, but it complicates things.
> +_unsupported_fmt luks
> +
> +echo
> +echo '=== Copy-on-read ==='
> +echo
> +
> +# Prep the images
> +_make_test_img 4G
> +$QEMU_IO -c "write -P 55 3G 1k" "$TEST_IMG" | _filter_qemu_io
> +IMGPROTO=file IMGFMT=qcow2 IMGOPTS= TEST_IMG_FILE="$TEST_WRAP" \
> + _make_test_img -F "$IMGFMT" -b "$TEST_IMG" | _filter_img_create
> +$QEMU_IO -f qcow2 -c "write -z -u 1M 64k" "$TEST_WRAP" | _filter_qemu_io
> +
> +# Ensure that a read of two clusters, but where one is already allocated,
> +# does not re-write the allocated cluster
> +cat > "$BLKDBG_CONF" <<EOF
> +[inject-error]
> +event = "cor_write"
> +sector = "2048"
> +EOF
> +$QEMU_IO -c "open -C \
> + -o driver=blkdebug,config=$BLKDBG_CONF,image.driver=qcow2 $TEST_WRAP" \
Hmm, this will lead to issues if $TEST_WRAP has spaces, right?
> + -c "read -P 0 1M 128k" | _filter_qemu_io
> +
> +# Read the areas we want copied. The first read is under 2G, but aligned
> +# so that rounding to clusters copies more than 2G of zeroes. The second
> +# read will pick up the non-zero data in the same cluster
> +$QEMU_IO -f qcow2 -C -c "read -P 0 1k $((2*1024*1024*1024 - 512))" \
> + "$TEST_WRAP" | _filter_qemu_io
> +$QEMU_IO -f qcow2 -C -c "read -P 0 $((3*1024*1024*1024 + 1024)) 1k" \
> + "$TEST_WRAP" | _filter_qemu_io
> +
> +# Copy-on-read is incompatible with read-only
> +$QEMU_IO -f qcow2 -C -r "$TEST_WRAP" 2>&1 | _filter_testdir
> +
> +# Break the backing chain, and show that images are identical, and that
> +# we properly copied over explicit zeros.
> +$QEMU_IMG rebase -u -b "" -f qcow2 "$TEST_WRAP"
> +$QEMU_IO -f qcow2 -c map "$TEST_WRAP"
> +_check_test_img
> +$QEMU_IMG compare -f $IMGFMT -F qcow2 "$TEST_IMG" "$TEST_WRAP"
> +
> +# success, all done
> +echo '*** done'
> +status=0
> diff --git a/tests/qemu-iotests/197.out b/tests/qemu-iotests/197.out
> new file mode 100644
> index 0000000000..baaa6b69e4
> --- /dev/null
> +++ b/tests/qemu-iotests/197.out
> @@ -0,0 +1,24 @@
> +QA output created by 197
> +
> +=== Copy-on-read ===
> +
> +Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=4294967296
> +wrote 1024/1024 bytes at offset 3221225472
> +1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
> +Formatting 'TEST_DIR/t.wrap.IMGFMT', fmt=IMGFMT size=4294967296 backing_file=TEST_DIR/t.IMGFMT backing_fmt=IMGFMT
> +wrote 65536/65536 bytes at offset 1048576
> +64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
> +read 131072/131072 bytes at offset 1048576
> +128 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
> +read 2147483136/2147483136 bytes at offset 1024
> +2 GiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
> +read 1024/1024 bytes at offset 3221226496
> +1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
> +can't open device TEST_DIR/t.wrap.qcow2: Can't use copy-on-read on read-only device
> +2 GiB (0x80010000) bytes allocated at offset 0 bytes (0x0)
> +1023.938 MiB (0x3fff0000) bytes not allocated at offset 2 GiB (0x80010000)
> +64 KiB (0x10000) bytes allocated at offset 3 GiB (0xc0000000)
> +1023.938 MiB (0x3fff0000) bytes not allocated at offset 3 GiB (0xc0010000)
> +No errors were found on the image.
> +Images are identical.
> +*** done
> diff --git a/tests/qemu-iotests/group b/tests/qemu-iotests/group
> index cdccee319e..7a302a67cf 100644
> --- a/tests/qemu-iotests/group
> +++ b/tests/qemu-iotests/group
> @@ -191,3 +191,4 @@
> 192 rw auto quick
> 194 rw auto migration quick
> 195 rw auto quick
> +197 rw auto quick
> --
> 2.13.6
>
>
^ permalink raw reply [flat|nested] 20+ messages in thread
* Re: [Qemu-devel] [Qemu-block] [PATCH 4/4] iotests: Add test 197 for covering copy-on-read
2017-10-01 3:03 ` [Qemu-devel] [Qemu-block] " Jeff Cody
@ 2017-10-02 13:55 ` Eric Blake
2017-10-02 14:04 ` Jeff Cody
0 siblings, 1 reply; 20+ messages in thread
From: Eric Blake @ 2017-10-02 13:55 UTC (permalink / raw)
To: Jeff Cody; +Cc: qemu-devel, kwolf, qemu-block, Max Reitz
[-- Attachment #1: Type: text/plain, Size: 1945 bytes --]
On 09/30/2017 10:03 PM, Jeff Cody wrote:
> On Sat, Sep 30, 2017 at 03:11:21PM -0500, Eric Blake wrote:
>> Add a test for qcow2 copy-on-read behavior, including exposure
>> for the just-fixed bugs.
>>
>> The copy-on-read behavior is always to a qcow2 image, but the
>> test is careful to allow running with most image protocol/format
>> combos as the backing file being copied from (luks being the
>> exception, as it is harder to pass the right secret to all the
>> right places). In fact, for './check nbd', this appears to be
>> the first time we've had a qcow2 image wrapping NBD, requiring
>> an additional line in _filter_img_create to match the similar
>> line in _filter_img_info.
>>
>> Signed-off-by: Eric Blake <eblake@redhat.com>
>>
>> +_cleanup()
>> +{
>> + _cleanup_test_img
>> + rm -f "$BLKDBG_CONF"
>> +}
>> +trap "_cleanup; exit \$status" 0 1 2 3 15
>
>
> Note to myself to add this to my iotests series.
Yep, and I even thought about that, since I've been pointing it out on
other patches, but forgot to mention it when composing the email ;)
>> +$QEMU_IO -c "open -C \
>> + -o driver=blkdebug,config=$BLKDBG_CONF,image.driver=qcow2 $TEST_WRAP" \
>
> Hmm, this will lead to issues if $TEST_WRAP has spaces, right?
Probably :( Although I didn't actually test that setup
But I don't know what other options we have to work around it. As long
as we are executing in the correct directory, I guess we can open both
BLKDBG_CONF and TEST_WRAP relative to ./ rather than as an absolute
path, and that should be sufficient to avoid spaces. But I don't know
how easy that is to achieve, or if _filter_qemu_io will handle it correctly.
Maybe I take the wimpy way out and skip the test if $PWD contains spaces
or other problematic characters?
--
Eric Blake, Principal Software Engineer
Red Hat, Inc. +1-919-301-3266
Virtualization: qemu.org | libvirt.org
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^ permalink raw reply [flat|nested] 20+ messages in thread
* Re: [Qemu-devel] [Qemu-block] [PATCH 4/4] iotests: Add test 197 for covering copy-on-read
2017-10-02 13:55 ` Eric Blake
@ 2017-10-02 14:04 ` Jeff Cody
0 siblings, 0 replies; 20+ messages in thread
From: Jeff Cody @ 2017-10-02 14:04 UTC (permalink / raw)
To: Eric Blake; +Cc: qemu-devel, kwolf, qemu-block, Max Reitz
On Mon, Oct 02, 2017 at 08:55:50AM -0500, Eric Blake wrote:
> On 09/30/2017 10:03 PM, Jeff Cody wrote:
> > On Sat, Sep 30, 2017 at 03:11:21PM -0500, Eric Blake wrote:
> >> Add a test for qcow2 copy-on-read behavior, including exposure
> >> for the just-fixed bugs.
> >>
> >> The copy-on-read behavior is always to a qcow2 image, but the
> >> test is careful to allow running with most image protocol/format
> >> combos as the backing file being copied from (luks being the
> >> exception, as it is harder to pass the right secret to all the
> >> right places). In fact, for './check nbd', this appears to be
> >> the first time we've had a qcow2 image wrapping NBD, requiring
> >> an additional line in _filter_img_create to match the similar
> >> line in _filter_img_info.
> >>
> >> Signed-off-by: Eric Blake <eblake@redhat.com>
> >>
>
> >> +_cleanup()
> >> +{
> >> + _cleanup_test_img
> >> + rm -f "$BLKDBG_CONF"
> >> +}
> >> +trap "_cleanup; exit \$status" 0 1 2 3 15
> >
> >
> > Note to myself to add this to my iotests series.
>
> Yep, and I even thought about that, since I've been pointing it out on
> other patches, but forgot to mention it when composing the email ;)
>
>
> >> +$QEMU_IO -c "open -C \
> >> + -o driver=blkdebug,config=$BLKDBG_CONF,image.driver=qcow2 $TEST_WRAP" \
> >
> > Hmm, this will lead to issues if $TEST_WRAP has spaces, right?
>
> Probably :( Although I didn't actually test that setup
>
> But I don't know what other options we have to work around it. As long
> as we are executing in the correct directory, I guess we can open both
> BLKDBG_CONF and TEST_WRAP relative to ./ rather than as an absolute
> path, and that should be sufficient to avoid spaces. But I don't know
> how easy that is to achieve, or if _filter_qemu_io will handle it correctly.
>
> Maybe I take the wimpy way out and skip the test if $PWD contains spaces
> or other problematic characters?
>
My thought is if the operation is destructive (writes, creates, deletes) a
file, we want to make sure we do not ruin someone's day by destroying a file
(e.g. "/home/jcody/qemu work", and having /home/jcody/qemu overwritten).
Spaces in pathnames for iotests don't work currently, however. So maybe the
proper thing to do, is for me to add to my iotests series a check for spaces
in TEST_DIR, and just refuse to run any tests at all (with an informative
reason why). And if it is ever fixed so that tests run (and run safely)
with spaces, we can remove that restriction.
Jeff
^ permalink raw reply [flat|nested] 20+ messages in thread
* Re: [Qemu-devel] [PATCH 0/4] block: Avoid copy-on-read assertions
2017-09-30 22:05 ` Eric Blake
@ 2017-10-02 14:50 ` Kevin Wolf
2017-10-02 15:10 ` Eric Blake
0 siblings, 1 reply; 20+ messages in thread
From: Kevin Wolf @ 2017-10-02 14:50 UTC (permalink / raw)
To: Eric Blake; +Cc: qemu-devel, famz, jsnow, qemu-block
[-- Attachment #1: Type: text/plain, Size: 2298 bytes --]
Am 01.10.2017 um 00:05 hat Eric Blake geschrieben:
> On 09/30/2017 04:19 PM, no-reply@patchew.org wrote:
> > Hi,
> >
> > This series failed build test on s390x host. Please find the details below.
> >
>
> > /var/tmp/patchew-tester-tmp-a2p2tpcc/src/block/io.c: In function ‘bdrv_aligned_preadv’:
> > /var/tmp/patchew-tester-tmp-a2p2tpcc/src/block/io.c:955:9: error: ‘ret’ may be used uninitialized in this function [-Werror=maybe-uninitialized]
> > int ret;
> > ^~~
>
> Blah - I compiled with -g instead of -O2, which masks this warning in my
> setup.
>
> The warning is a false negative (the error message is actually pointing
> to a line in bdrv_co_do_copy_on_readv - but the compiler must have
> inlined it into bdrv_aligned_preadv) - the function is only ever called
> with non-zero bytes, and therefore the 'while (cluster_bytes)' loop will
> execute at least once, and ret always gets assigned. But the compiler
> can't see that, so I'll squash this in:
Well, you could help the compiler with this:
assert(cluster_bytes > 0);
Then it compiles. Unfortunately, the compiler was right and you weren't:
$ ./qemu-io -C -c 'read 0 0' /tmp/test.qcow2
qemu-io: block/io.c:988: bdrv_co_do_copy_on_readv: Assertion `cluster_bytes > 0' failed.
Abgebrochen (Speicherabzug geschrieben)
Maybe a case to add to the test?
> commit a201636c3133827bd632d5fdd9eb1f5df81d0e0e
> Author: Eric Blake <eblake@redhat.com>
> Date: Sat Sep 30 14:27:51 2017 -0500
>
> fixup! block: Perform copy-on-read in loop
>
> Signed-off-by: Eric Blake <eblake@redhat.com>
>
> diff --git a/block/io.c b/block/io.c
> index 5ef5adc7a7..e7519464bb 100644
> --- a/block/io.c
> +++ b/block/io.c
> @@ -952,7 +952,7 @@ static int coroutine_fn
> bdrv_co_do_copy_on_readv(BdrvChild *child,
> int64_t cluster_offset;
> unsigned int cluster_bytes;
> size_t skip_bytes;
> - int ret;
> + int ret = 0;
> int max_transfer = MIN_NON_ZERO(bs->bl.max_transfer,
> BDRV_REQUEST_MAX_BYTES);
> unsigned int progress = 0;
I would prefer a ret = 0 immediately before err: so that we'll still get
warning if we forget assigning ret in any future error path.
Kevin
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^ permalink raw reply [flat|nested] 20+ messages in thread
* Re: [Qemu-devel] [PATCH 1/4] qemu-io: Add -C for opening with copy-on-read
2017-09-30 19:53 ` [Qemu-devel] [PATCH 1/4] qemu-io: Add -C for opening with copy-on-read Eric Blake
2017-10-01 3:00 ` [Qemu-devel] [Qemu-block] " Jeff Cody
@ 2017-10-02 14:52 ` Kevin Wolf
2017-10-02 18:03 ` John Snow
2017-10-02 19:28 ` [Qemu-devel] [Qemu-block] " Stefan Hajnoczi
3 siblings, 0 replies; 20+ messages in thread
From: Kevin Wolf @ 2017-10-02 14:52 UTC (permalink / raw)
To: Eric Blake; +Cc: qemu-devel, jsnow, qemu-block, Max Reitz
Am 30.09.2017 um 21:53 hat Eric Blake geschrieben:
> Make it easier to enable copy-on-read during iotests, by
> exposing a new bool option to main and open.
>
> Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
^ permalink raw reply [flat|nested] 20+ messages in thread
* Re: [Qemu-devel] [PATCH 2/4] block: Add blkdebug hook for copy-on-read
2017-09-30 19:53 ` [Qemu-devel] [PATCH 2/4] block: Add blkdebug hook for copy-on-read Eric Blake
2017-10-01 3:00 ` [Qemu-devel] [Qemu-block] " Jeff Cody
@ 2017-10-02 14:52 ` Kevin Wolf
2017-10-02 18:08 ` John Snow
2017-10-02 19:28 ` [Qemu-devel] [Qemu-block] " Stefan Hajnoczi
3 siblings, 0 replies; 20+ messages in thread
From: Kevin Wolf @ 2017-10-02 14:52 UTC (permalink / raw)
To: Eric Blake
Cc: qemu-devel, jsnow, qemu-block, Stefan Hajnoczi, Fam Zheng,
Max Reitz, Markus Armbruster
Am 30.09.2017 um 21:53 hat Eric Blake geschrieben:
> Make it possible to inject errors on writes performed during a
> read operation due to copy-on-read semantics.
>
> Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
^ permalink raw reply [flat|nested] 20+ messages in thread
* Re: [Qemu-devel] [PATCH 0/4] block: Avoid copy-on-read assertions
2017-10-02 14:50 ` Kevin Wolf
@ 2017-10-02 15:10 ` Eric Blake
0 siblings, 0 replies; 20+ messages in thread
From: Eric Blake @ 2017-10-02 15:10 UTC (permalink / raw)
To: Kevin Wolf; +Cc: qemu-devel, famz, jsnow, qemu-block
[-- Attachment #1: Type: text/plain, Size: 2468 bytes --]
On 10/02/2017 09:50 AM, Kevin Wolf wrote:
>> The warning is a false negative (the error message is actually pointing
>> to a line in bdrv_co_do_copy_on_readv - but the compiler must have
>> inlined it into bdrv_aligned_preadv) - the function is only ever called
>> with non-zero bytes, and therefore the 'while (cluster_bytes)' loop will
>> execute at least once, and ret always gets assigned. But the compiler
>> can't see that, so I'll squash this in:
>
> Well, you could help the compiler with this:
>
> assert(cluster_bytes > 0);
>
> Then it compiles. Unfortunately, the compiler was right and you weren't:
>
> $ ./qemu-io -C -c 'read 0 0' /tmp/test.qcow2
> qemu-io: block/io.c:988: bdrv_co_do_copy_on_readv: Assertion `cluster_bytes > 0' failed.
> Abgebrochen (Speicherabzug geschrieben)
>
> Maybe a case to add to the test?
Of course - that's a good test to have.
So it turns out the reason we get in with 0 length is:
ret = bdrv_is_allocated(bs, offset, bytes, &pnum);
if (ret < 0) {
goto out;
}
if (!ret || pnum != bytes) {
ret = bdrv_co_do_copy_on_readv(child, offset, bytes, qiov);
goto out;
}
because bdrv_is_allocated() returns 0 for a 0-length query. I wonder if
we should instead assert that bdrv_is_allocated/bdrv_get_block_status()
are given a non-zero size, and fix callers to avoid a 0-length query
(after all, it's tough to argue that the read is allocated in the
current layer or defers to a backing layer, when there is nothing to be
read).
>> +++ b/block/io.c
>> @@ -952,7 +952,7 @@ static int coroutine_fn
>> bdrv_co_do_copy_on_readv(BdrvChild *child,
>> int64_t cluster_offset;
>> unsigned int cluster_bytes;
>> size_t skip_bytes;
>> - int ret;
>> + int ret = 0;
>> int max_transfer = MIN_NON_ZERO(bs->bl.max_transfer,
>> BDRV_REQUEST_MAX_BYTES);
>> unsigned int progress = 0;
>
> I would prefer a ret = 0 immediately before err: so that we'll still get
> warning if we forget assigning ret in any future error path.
Sure, I can take that approach instead. v2 coming up, after a bit more
of a wait for any other review comments on the main patch rather than
just this fixup.
--
Eric Blake, Principal Software Engineer
Red Hat, Inc. +1-919-301-3266
Virtualization: qemu.org | libvirt.org
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^ permalink raw reply [flat|nested] 20+ messages in thread
* Re: [Qemu-devel] [PATCH 1/4] qemu-io: Add -C for opening with copy-on-read
2017-09-30 19:53 ` [Qemu-devel] [PATCH 1/4] qemu-io: Add -C for opening with copy-on-read Eric Blake
2017-10-01 3:00 ` [Qemu-devel] [Qemu-block] " Jeff Cody
2017-10-02 14:52 ` [Qemu-devel] " Kevin Wolf
@ 2017-10-02 18:03 ` John Snow
2017-10-02 19:28 ` [Qemu-devel] [Qemu-block] " Stefan Hajnoczi
3 siblings, 0 replies; 20+ messages in thread
From: John Snow @ 2017-10-02 18:03 UTC (permalink / raw)
To: Eric Blake, qemu-devel; +Cc: kwolf, qemu-block, Max Reitz
On 09/30/2017 03:53 PM, Eric Blake wrote:
> Make it easier to enable copy-on-read during iotests, by
> exposing a new bool option to main and open.
>
> Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
^ permalink raw reply [flat|nested] 20+ messages in thread
* Re: [Qemu-devel] [PATCH 2/4] block: Add blkdebug hook for copy-on-read
2017-09-30 19:53 ` [Qemu-devel] [PATCH 2/4] block: Add blkdebug hook for copy-on-read Eric Blake
2017-10-01 3:00 ` [Qemu-devel] [Qemu-block] " Jeff Cody
2017-10-02 14:52 ` [Qemu-devel] " Kevin Wolf
@ 2017-10-02 18:08 ` John Snow
2017-10-02 19:28 ` [Qemu-devel] [Qemu-block] " Stefan Hajnoczi
3 siblings, 0 replies; 20+ messages in thread
From: John Snow @ 2017-10-02 18:08 UTC (permalink / raw)
To: Eric Blake, qemu-devel
Cc: kwolf, qemu-block, Stefan Hajnoczi, Fam Zheng, Max Reitz,
Markus Armbruster
On 09/30/2017 03:53 PM, Eric Blake wrote:
> Make it possible to inject errors on writes performed during a
> read operation due to copy-on-read semantics.
>
> Signed-off-by: Eric Blake <eblake@redhat.com>
I suppose our docs DO say "ehh, see block-core.json" so I suppose no
update is necessary :)
Reviewed-by: John Snow <jsnow@redhat.com>
^ permalink raw reply [flat|nested] 20+ messages in thread
* Re: [Qemu-devel] [Qemu-block] [PATCH 1/4] qemu-io: Add -C for opening with copy-on-read
2017-09-30 19:53 ` [Qemu-devel] [PATCH 1/4] qemu-io: Add -C for opening with copy-on-read Eric Blake
` (2 preceding siblings ...)
2017-10-02 18:03 ` John Snow
@ 2017-10-02 19:28 ` Stefan Hajnoczi
3 siblings, 0 replies; 20+ messages in thread
From: Stefan Hajnoczi @ 2017-10-02 19:28 UTC (permalink / raw)
To: Eric Blake; +Cc: qemu-devel, kwolf, qemu-block, Max Reitz
On Sat, Sep 30, 2017 at 02:53:42PM -0500, Eric Blake wrote:
> Make it easier to enable copy-on-read during iotests, by
> exposing a new bool option to main and open.
>
> Signed-off-by: Eric Blake <eblake@redhat.com>
> ---
> qemu-io.c | 15 ++++++++++++---
> 1 file changed, 12 insertions(+), 3 deletions(-)
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
^ permalink raw reply [flat|nested] 20+ messages in thread
* Re: [Qemu-devel] [Qemu-block] [PATCH 2/4] block: Add blkdebug hook for copy-on-read
2017-09-30 19:53 ` [Qemu-devel] [PATCH 2/4] block: Add blkdebug hook for copy-on-read Eric Blake
` (2 preceding siblings ...)
2017-10-02 18:08 ` John Snow
@ 2017-10-02 19:28 ` Stefan Hajnoczi
3 siblings, 0 replies; 20+ messages in thread
From: Stefan Hajnoczi @ 2017-10-02 19:28 UTC (permalink / raw)
To: Eric Blake
Cc: qemu-devel, kwolf, Fam Zheng, qemu-block, Markus Armbruster,
Max Reitz, Stefan Hajnoczi
On Sat, Sep 30, 2017 at 02:53:43PM -0500, Eric Blake wrote:
> Make it possible to inject errors on writes performed during a
> read operation due to copy-on-read semantics.
>
> Signed-off-by: Eric Blake <eblake@redhat.com>
> ---
> qapi/block-core.json | 5 ++++-
> block/io.c | 1 +
> 2 files changed, 5 insertions(+), 1 deletion(-)
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
^ permalink raw reply [flat|nested] 20+ messages in thread
end of thread, other threads:[~2017-10-02 19:28 UTC | newest]
Thread overview: 20+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2017-09-30 19:53 [Qemu-devel] [PATCH 0/4] block: Avoid copy-on-read assertions Eric Blake
2017-09-30 19:53 ` [Qemu-devel] [PATCH 1/4] qemu-io: Add -C for opening with copy-on-read Eric Blake
2017-10-01 3:00 ` [Qemu-devel] [Qemu-block] " Jeff Cody
2017-10-02 14:52 ` [Qemu-devel] " Kevin Wolf
2017-10-02 18:03 ` John Snow
2017-10-02 19:28 ` [Qemu-devel] [Qemu-block] " Stefan Hajnoczi
2017-09-30 19:53 ` [Qemu-devel] [PATCH 2/4] block: Add blkdebug hook for copy-on-read Eric Blake
2017-10-01 3:00 ` [Qemu-devel] [Qemu-block] " Jeff Cody
2017-10-02 14:52 ` [Qemu-devel] " Kevin Wolf
2017-10-02 18:08 ` John Snow
2017-10-02 19:28 ` [Qemu-devel] [Qemu-block] " Stefan Hajnoczi
2017-09-30 19:53 ` [Qemu-devel] [PATCH 3/4] block: Perform copy-on-read in loop Eric Blake
2017-09-30 20:11 ` [Qemu-devel] [PATCH 4/4] iotests: Add test 197 for covering copy-on-read Eric Blake
2017-10-01 3:03 ` [Qemu-devel] [Qemu-block] " Jeff Cody
2017-10-02 13:55 ` Eric Blake
2017-10-02 14:04 ` Jeff Cody
2017-09-30 21:19 ` [Qemu-devel] [PATCH 0/4] block: Avoid copy-on-read assertions no-reply
2017-09-30 22:05 ` Eric Blake
2017-10-02 14:50 ` Kevin Wolf
2017-10-02 15:10 ` Eric Blake
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