* [PATCH v5 01/11] block/io: bring request check to bdrv_co_(read, write)v_vmstate
2021-05-05 7:49 [PATCH v5 00/11] 64bit block-layer: part II Vladimir Sementsov-Ogievskiy
@ 2021-05-05 7:49 ` Vladimir Sementsov-Ogievskiy via
2021-05-05 7:49 ` [PATCH v5 02/11] qcow2: check request on vmstate save/load path Vladimir Sementsov-Ogievskiy
` (11 subsequent siblings)
12 siblings, 0 replies; 22+ messages in thread
From: Vladimir Sementsov-Ogievskiy via @ 2021-05-05 7:49 UTC (permalink / raw)
To: qemu-block
Cc: qemu-devel, eblake, stefanha, kwolf, mreitz, vsementsov, Fam Zheng
There are only two drivers supporting vmstate: qcow2 and sheepdog.
Sheepdog is deprecated. In qcow2 these requests go through
.bdrv_co_p{read,write}v_part handlers.
So, let's do our basic check for the request on vmstate generic
handlers.
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
---
block/io.c | 18 ++++++++++++++++--
1 file changed, 16 insertions(+), 2 deletions(-)
diff --git a/block/io.c b/block/io.c
index 35b6c56efc..3eb6a38008 100644
--- a/block/io.c
+++ b/block/io.c
@@ -2745,7 +2745,12 @@ bdrv_co_readv_vmstate(BlockDriverState *bs, QEMUIOVector *qiov, int64_t pos)
{
BlockDriver *drv = bs->drv;
BlockDriverState *child_bs = bdrv_primary_bs(bs);
- int ret = -ENOTSUP;
+ int ret;
+
+ ret = bdrv_check_qiov_request(pos, qiov->size, qiov, 0, NULL);
+ if (ret < 0) {
+ return ret;
+ }
if (!drv) {
return -ENOMEDIUM;
@@ -2757,6 +2762,8 @@ bdrv_co_readv_vmstate(BlockDriverState *bs, QEMUIOVector *qiov, int64_t pos)
ret = drv->bdrv_load_vmstate(bs, qiov, pos);
} else if (child_bs) {
ret = bdrv_co_readv_vmstate(child_bs, qiov, pos);
+ } else {
+ ret = -ENOTSUP;
}
bdrv_dec_in_flight(bs);
@@ -2769,7 +2776,12 @@ bdrv_co_writev_vmstate(BlockDriverState *bs, QEMUIOVector *qiov, int64_t pos)
{
BlockDriver *drv = bs->drv;
BlockDriverState *child_bs = bdrv_primary_bs(bs);
- int ret = -ENOTSUP;
+ int ret;
+
+ ret = bdrv_check_qiov_request(pos, qiov->size, qiov, 0, NULL);
+ if (ret < 0) {
+ return ret;
+ }
if (!drv) {
return -ENOMEDIUM;
@@ -2781,6 +2793,8 @@ bdrv_co_writev_vmstate(BlockDriverState *bs, QEMUIOVector *qiov, int64_t pos)
ret = drv->bdrv_save_vmstate(bs, qiov, pos);
} else if (child_bs) {
ret = bdrv_co_writev_vmstate(child_bs, qiov, pos);
+ } else {
+ ret = -ENOTSUP;
}
bdrv_dec_in_flight(bs);
--
2.29.2
^ permalink raw reply related [flat|nested] 22+ messages in thread* [PATCH v5 02/11] qcow2: check request on vmstate save/load path
2021-05-05 7:49 [PATCH v5 00/11] 64bit block-layer: part II Vladimir Sementsov-Ogievskiy
2021-05-05 7:49 ` [PATCH v5 01/11] block/io: bring request check to bdrv_co_(read, write)v_vmstate Vladimir Sementsov-Ogievskiy via
@ 2021-05-05 7:49 ` Vladimir Sementsov-Ogievskiy
2021-05-05 7:49 ` [PATCH v5 03/11] block: use int64_t instead of uint64_t in driver read handlers Vladimir Sementsov-Ogievskiy
` (10 subsequent siblings)
12 siblings, 0 replies; 22+ messages in thread
From: Vladimir Sementsov-Ogievskiy @ 2021-05-05 7:49 UTC (permalink / raw)
To: qemu-block
Cc: qemu-devel, eblake, stefanha, kwolf, mreitz, vsementsov, Fam Zheng
We modify the request by adding an offset to vmstate. Let's check the
modified request. It will help us to safely move .bdrv_co_preadv_part
and .bdrv_co_pwritev_part to int64_t type of offset and bytes.
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
---
include/block/block_int.h | 3 +++
block/io.c | 6 +++---
block/qcow2.c | 43 +++++++++++++++++++++++++++++++++------
3 files changed, 43 insertions(+), 9 deletions(-)
diff --git a/include/block/block_int.h b/include/block/block_int.h
index c823f5b1b3..d2143eb40f 100644
--- a/include/block/block_int.h
+++ b/include/block/block_int.h
@@ -93,6 +93,9 @@ typedef struct BdrvTrackedRequest {
struct BdrvTrackedRequest *waiting_for;
} BdrvTrackedRequest;
+int bdrv_check_qiov_request(int64_t offset, int64_t bytes,
+ QEMUIOVector *qiov, size_t qiov_offset,
+ Error **errp);
int bdrv_check_request(int64_t offset, int64_t bytes, Error **errp);
struct BlockDriver {
diff --git a/block/io.c b/block/io.c
index 3eb6a38008..932a26f0bb 100644
--- a/block/io.c
+++ b/block/io.c
@@ -951,9 +951,9 @@ bool coroutine_fn bdrv_make_request_serialising(BdrvTrackedRequest *req,
return waited;
}
-static int bdrv_check_qiov_request(int64_t offset, int64_t bytes,
- QEMUIOVector *qiov, size_t qiov_offset,
- Error **errp)
+int bdrv_check_qiov_request(int64_t offset, int64_t bytes,
+ QEMUIOVector *qiov, size_t qiov_offset,
+ Error **errp)
{
/*
* Check generic offset/bytes correctness
diff --git a/block/qcow2.c b/block/qcow2.c
index 9727ae8fe3..227885620d 100644
--- a/block/qcow2.c
+++ b/block/qcow2.c
@@ -5201,24 +5201,55 @@ static int qcow2_has_zero_init(BlockDriverState *bs)
}
}
+/*
+ * Check the request to vmstate. On success return
+ * qcow2_vm_state_offset(bs) + @pos
+ */
+static int64_t qcow2_check_vmstate_request(BlockDriverState *bs,
+ QEMUIOVector *qiov, int64_t pos)
+{
+ BDRVQcow2State *s = bs->opaque;
+ int64_t vmstate_offset = qcow2_vm_state_offset(s);
+ int ret;
+
+ /* Incoming requests must be OK */
+ bdrv_check_qiov_request(pos, qiov->size, qiov, 0, &error_abort);
+
+ if (INT64_MAX - pos < vmstate_offset) {
+ return -EIO;
+ }
+
+ pos += vmstate_offset;
+ ret = bdrv_check_qiov_request(pos, qiov->size, qiov, 0, NULL);
+ if (ret < 0) {
+ return ret;
+ }
+
+ return pos;
+}
+
static int qcow2_save_vmstate(BlockDriverState *bs, QEMUIOVector *qiov,
int64_t pos)
{
- BDRVQcow2State *s = bs->opaque;
+ int64_t offset = qcow2_check_vmstate_request(bs, qiov, pos);
+ if (offset < 0) {
+ return offset;
+ }
BLKDBG_EVENT(bs->file, BLKDBG_VMSTATE_SAVE);
- return bs->drv->bdrv_co_pwritev_part(bs, qcow2_vm_state_offset(s) + pos,
- qiov->size, qiov, 0, 0);
+ return bs->drv->bdrv_co_pwritev_part(bs, offset, qiov->size, qiov, 0, 0);
}
static int qcow2_load_vmstate(BlockDriverState *bs, QEMUIOVector *qiov,
int64_t pos)
{
- BDRVQcow2State *s = bs->opaque;
+ int64_t offset = qcow2_check_vmstate_request(bs, qiov, pos);
+ if (offset < 0) {
+ return offset;
+ }
BLKDBG_EVENT(bs->file, BLKDBG_VMSTATE_LOAD);
- return bs->drv->bdrv_co_preadv_part(bs, qcow2_vm_state_offset(s) + pos,
- qiov->size, qiov, 0, 0);
+ return bs->drv->bdrv_co_preadv_part(bs, offset, qiov->size, qiov, 0, 0);
}
/*
--
2.29.2
^ permalink raw reply related [flat|nested] 22+ messages in thread* [PATCH v5 03/11] block: use int64_t instead of uint64_t in driver read handlers
2021-05-05 7:49 [PATCH v5 00/11] 64bit block-layer: part II Vladimir Sementsov-Ogievskiy
2021-05-05 7:49 ` [PATCH v5 01/11] block/io: bring request check to bdrv_co_(read, write)v_vmstate Vladimir Sementsov-Ogievskiy via
2021-05-05 7:49 ` [PATCH v5 02/11] qcow2: check request on vmstate save/load path Vladimir Sementsov-Ogievskiy
@ 2021-05-05 7:49 ` Vladimir Sementsov-Ogievskiy
2021-05-05 7:49 ` [PATCH v5 04/11] block: use int64_t instead of uint64_t in driver write handlers Vladimir Sementsov-Ogievskiy
` (9 subsequent siblings)
12 siblings, 0 replies; 22+ messages in thread
From: Vladimir Sementsov-Ogievskiy @ 2021-05-05 7:49 UTC (permalink / raw)
To: qemu-block
Cc: qemu-devel, eblake, stefanha, kwolf, mreitz, vsementsov,
John Snow, Ari Sundholm, Pavel Dovgalyuk, Paolo Bonzini,
Stefan Weil, Peter Lieven, Fam Zheng, Alberto Garcia,
Jason Dillaman
We are going to convert .bdrv_co_preadv_part and .bdrv_co_pwritev_part
to int64_t type for offset and bytes parameters (as it's already done
for generic block/io.c layer).
In qcow2 .bdrv_co_preadv_part is used in some places, so let's add
corresponding checks and assertions.
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
block: use int64_t instead of uint64_t in driver read handlers
We are generally moving to int64_t for both offset and bytes parameters
on all io paths.
Main motivation is realization of 64-bit write_zeroes operation for
fast zeroing large disk chunks, up to the whole disk.
We chose signed type, to be consistent with off_t (which is signed) and
with possibility for signed return type (where negative value means
error).
So, convert driver read handlers parameters which are already 64bit to
signed type.
While being here, convert also flags parameter to be BdrvRequestFlags.
Now let's consider all callers. Simple
git grep '\->bdrv_\(aio\|co\)_preadv\(_part\)\?'
shows that's there three callers of driver function:
bdrv_driver_preadv() in block/io.c, passes int64_t, checked by
bdrv_check_qiov_request() to be non-negative.
qcow2_load_vmstate() does bdrv_check_qiov_request().
do_perform_cow_read() has uint64_t argument. And a lot of things in
qcow2 driver are uint64_t, so converting it is big job. But we must
not work with requests that doesn't satisfy bdrv_check_qiov_request(),
so let's just assert it here.
Still, the functions may be called directly, not only by drv->...
Let's check:
git grep '\.bdrv_\(aio\|co\)_preadv\(_part\)\?\s*=' | \
awk '{print $4}' | sed 's/,//' | sed 's/&//' | sort | uniq | \
while read func; do git grep "$func(" | \
grep -v "$func(BlockDriverState"; done
The only one such caller:
QEMUIOVector qiov = QEMU_IOVEC_INIT_BUF(qiov, &data, 1);
...
ret = bdrv_replace_test_co_preadv(bs, 0, 1, &qiov, 0);
in tesTS/unit/test-bdrv-drain.c, and it's OK obviously.
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
---
include/block/block_int.h | 11 ++++++-----
block/backup-top.c | 4 ++--
block/blkdebug.c | 4 ++--
block/blklogwrites.c | 4 ++--
block/blkreplay.c | 2 +-
block/blkverify.c | 4 ++--
block/bochs.c | 4 ++--
block/cloop.c | 4 ++--
block/commit.c | 2 +-
block/copy-on-read.c | 4 ++--
block/crypto.c | 4 ++--
block/curl.c | 3 ++-
block/dmg.c | 4 ++--
block/file-posix.c | 6 +++---
block/file-win32.c | 4 ++--
block/filter-compress.c | 4 ++--
block/mirror.c | 2 +-
block/nbd.c | 5 +++--
block/nfs.c | 6 +++---
block/null.c | 9 +++++----
block/nvme.c | 5 +++--
block/preallocate.c | 4 ++--
block/qcow.c | 6 +++---
block/qcow2-cluster.c | 14 +++++++++++++-
block/qcow2.c | 5 +++--
block/quorum.c | 4 ++--
block/raw-format.c | 20 ++++++++++----------
block/rbd.c | 5 +++--
block/throttle.c | 5 +++--
block/vdi.c | 4 ++--
block/vmdk.c | 4 ++--
block/vpc.c | 4 ++--
block/vvfat.c | 4 ++--
tests/unit/test-bdrv-drain.c | 16 +++++++++-------
tests/unit/test-block-iothread.c | 19 ++++++++++++++-----
35 files changed, 120 insertions(+), 89 deletions(-)
diff --git a/include/block/block_int.h b/include/block/block_int.h
index d2143eb40f..dc08f99e95 100644
--- a/include/block/block_int.h
+++ b/include/block/block_int.h
@@ -234,8 +234,8 @@ struct BlockDriver {
/* aio */
BlockAIOCB *(*bdrv_aio_preadv)(BlockDriverState *bs,
- uint64_t offset, uint64_t bytes, QEMUIOVector *qiov, int flags,
- BlockCompletionFunc *cb, void *opaque);
+ int64_t offset, int64_t bytes, QEMUIOVector *qiov,
+ BdrvRequestFlags flags, BlockCompletionFunc *cb, void *opaque);
BlockAIOCB *(*bdrv_aio_pwritev)(BlockDriverState *bs,
uint64_t offset, uint64_t bytes, QEMUIOVector *qiov, int flags,
BlockCompletionFunc *cb, void *opaque);
@@ -264,10 +264,11 @@ struct BlockDriver {
* The buffer in @qiov may point directly to guest memory.
*/
int coroutine_fn (*bdrv_co_preadv)(BlockDriverState *bs,
- uint64_t offset, uint64_t bytes, QEMUIOVector *qiov, int flags);
+ int64_t offset, int64_t bytes, QEMUIOVector *qiov,
+ BdrvRequestFlags flags);
int coroutine_fn (*bdrv_co_preadv_part)(BlockDriverState *bs,
- uint64_t offset, uint64_t bytes,
- QEMUIOVector *qiov, size_t qiov_offset, int flags);
+ int64_t offset, int64_t bytes,
+ QEMUIOVector *qiov, size_t qiov_offset, BdrvRequestFlags flags);
int coroutine_fn (*bdrv_co_writev)(BlockDriverState *bs,
int64_t sector_num, int nb_sectors, QEMUIOVector *qiov, int flags);
/**
diff --git a/block/backup-top.c b/block/backup-top.c
index 425e3778be..fb32ac7b2b 100644
--- a/block/backup-top.c
+++ b/block/backup-top.c
@@ -41,8 +41,8 @@ typedef struct BDRVBackupTopState {
} BDRVBackupTopState;
static coroutine_fn int backup_top_co_preadv(
- BlockDriverState *bs, uint64_t offset, uint64_t bytes,
- QEMUIOVector *qiov, int flags)
+ BlockDriverState *bs, int64_t offset, int64_t bytes,
+ QEMUIOVector *qiov, BdrvRequestFlags flags)
{
return bdrv_co_preadv(bs->backing, offset, bytes, qiov, flags);
}
diff --git a/block/blkdebug.c b/block/blkdebug.c
index 2c0b9b0ee8..b26fecf222 100644
--- a/block/blkdebug.c
+++ b/block/blkdebug.c
@@ -614,8 +614,8 @@ static int rule_check(BlockDriverState *bs, uint64_t offset, uint64_t bytes,
}
static int coroutine_fn
-blkdebug_co_preadv(BlockDriverState *bs, uint64_t offset, uint64_t bytes,
- QEMUIOVector *qiov, int flags)
+blkdebug_co_preadv(BlockDriverState *bs, int64_t offset, int64_t bytes,
+ QEMUIOVector *qiov, BdrvRequestFlags flags)
{
int err;
diff --git a/block/blklogwrites.c b/block/blklogwrites.c
index b7579370a3..de3d4ba2b6 100644
--- a/block/blklogwrites.c
+++ b/block/blklogwrites.c
@@ -301,8 +301,8 @@ static void blk_log_writes_refresh_limits(BlockDriverState *bs, Error **errp)
}
static int coroutine_fn
-blk_log_writes_co_preadv(BlockDriverState *bs, uint64_t offset, uint64_t bytes,
- QEMUIOVector *qiov, int flags)
+blk_log_writes_co_preadv(BlockDriverState *bs, int64_t offset, int64_t bytes,
+ QEMUIOVector *qiov, BdrvRequestFlags flags)
{
return bdrv_co_preadv(bs->file, offset, bytes, qiov, flags);
}
diff --git a/block/blkreplay.c b/block/blkreplay.c
index 4a247752fd..13ea2166bb 100644
--- a/block/blkreplay.c
+++ b/block/blkreplay.c
@@ -72,7 +72,7 @@ static void block_request_create(uint64_t reqid, BlockDriverState *bs,
}
static int coroutine_fn blkreplay_co_preadv(BlockDriverState *bs,
- uint64_t offset, uint64_t bytes, QEMUIOVector *qiov, int flags)
+ int64_t offset, int64_t bytes, QEMUIOVector *qiov, BdrvRequestFlags flags)
{
uint64_t reqid = blkreplay_next_id();
int ret = bdrv_co_preadv(bs->file, offset, bytes, qiov, flags);
diff --git a/block/blkverify.c b/block/blkverify.c
index 188d7632fa..5e35744b8a 100644
--- a/block/blkverify.c
+++ b/block/blkverify.c
@@ -221,8 +221,8 @@ blkverify_co_prwv(BlockDriverState *bs, BlkverifyRequest *r, uint64_t offset,
}
static int coroutine_fn
-blkverify_co_preadv(BlockDriverState *bs, uint64_t offset, uint64_t bytes,
- QEMUIOVector *qiov, int flags)
+blkverify_co_preadv(BlockDriverState *bs, int64_t offset, int64_t bytes,
+ QEMUIOVector *qiov, BdrvRequestFlags flags)
{
BlkverifyRequest r;
QEMUIOVector raw_qiov;
diff --git a/block/bochs.c b/block/bochs.c
index 2f010ab40a..4d68658087 100644
--- a/block/bochs.c
+++ b/block/bochs.c
@@ -238,8 +238,8 @@ static int64_t seek_to_sector(BlockDriverState *bs, int64_t sector_num)
}
static int coroutine_fn
-bochs_co_preadv(BlockDriverState *bs, uint64_t offset, uint64_t bytes,
- QEMUIOVector *qiov, int flags)
+bochs_co_preadv(BlockDriverState *bs, int64_t offset, int64_t bytes,
+ QEMUIOVector *qiov, BdrvRequestFlags flags)
{
BDRVBochsState *s = bs->opaque;
uint64_t sector_num = offset >> BDRV_SECTOR_BITS;
diff --git a/block/cloop.c b/block/cloop.c
index c99192a57f..b8c6d0eccd 100644
--- a/block/cloop.c
+++ b/block/cloop.c
@@ -245,8 +245,8 @@ static inline int cloop_read_block(BlockDriverState *bs, int block_num)
}
static int coroutine_fn
-cloop_co_preadv(BlockDriverState *bs, uint64_t offset, uint64_t bytes,
- QEMUIOVector *qiov, int flags)
+cloop_co_preadv(BlockDriverState *bs, int64_t offset, int64_t bytes,
+ QEMUIOVector *qiov, BdrvRequestFlags flags)
{
BDRVCloopState *s = bs->opaque;
uint64_t sector_num = offset >> BDRV_SECTOR_BITS;
diff --git a/block/commit.c b/block/commit.c
index b89bb20b75..d9278d0192 100644
--- a/block/commit.c
+++ b/block/commit.c
@@ -212,7 +212,7 @@ static const BlockJobDriver commit_job_driver = {
};
static int coroutine_fn bdrv_commit_top_preadv(BlockDriverState *bs,
- uint64_t offset, uint64_t bytes, QEMUIOVector *qiov, int flags)
+ int64_t offset, int64_t bytes, QEMUIOVector *qiov, BdrvRequestFlags flags)
{
return bdrv_co_preadv(bs->backing, offset, bytes, qiov, flags);
}
diff --git a/block/copy-on-read.c b/block/copy-on-read.c
index 9cad9e1b8c..afb2a77b08 100644
--- a/block/copy-on-read.c
+++ b/block/copy-on-read.c
@@ -141,10 +141,10 @@ static int64_t cor_getlength(BlockDriverState *bs)
static int coroutine_fn cor_co_preadv_part(BlockDriverState *bs,
- uint64_t offset, uint64_t bytes,
+ int64_t offset, int64_t bytes,
QEMUIOVector *qiov,
size_t qiov_offset,
- int flags)
+ BdrvRequestFlags flags)
{
int64_t n;
int local_flags;
diff --git a/block/crypto.c b/block/crypto.c
index 1d30fde38e..a732a36d10 100644
--- a/block/crypto.c
+++ b/block/crypto.c
@@ -397,8 +397,8 @@ static int block_crypto_reopen_prepare(BDRVReopenState *state,
#define BLOCK_CRYPTO_MAX_IO_SIZE (1024 * 1024)
static coroutine_fn int
-block_crypto_co_preadv(BlockDriverState *bs, uint64_t offset, uint64_t bytes,
- QEMUIOVector *qiov, int flags)
+block_crypto_co_preadv(BlockDriverState *bs, int64_t offset, int64_t bytes,
+ QEMUIOVector *qiov, BdrvRequestFlags flags)
{
BlockCrypto *crypto = bs->opaque;
uint64_t cur_bytes; /* number of bytes in current iteration */
diff --git a/block/curl.c b/block/curl.c
index 50e741a0d7..4a8ae2b269 100644
--- a/block/curl.c
+++ b/block/curl.c
@@ -896,7 +896,8 @@ out:
}
static int coroutine_fn curl_co_preadv(BlockDriverState *bs,
- uint64_t offset, uint64_t bytes, QEMUIOVector *qiov, int flags)
+ int64_t offset, int64_t bytes, QEMUIOVector *qiov,
+ BdrvRequestFlags flags)
{
CURLAIOCB acb = {
.co = qemu_coroutine_self(),
diff --git a/block/dmg.c b/block/dmg.c
index ef35a505f2..447901fbb8 100644
--- a/block/dmg.c
+++ b/block/dmg.c
@@ -689,8 +689,8 @@ static inline int dmg_read_chunk(BlockDriverState *bs, uint64_t sector_num)
}
static int coroutine_fn
-dmg_co_preadv(BlockDriverState *bs, uint64_t offset, uint64_t bytes,
- QEMUIOVector *qiov, int flags)
+dmg_co_preadv(BlockDriverState *bs, int64_t offset, int64_t bytes,
+ QEMUIOVector *qiov, BdrvRequestFlags flags)
{
BDRVDMGState *s = bs->opaque;
uint64_t sector_num = offset >> BDRV_SECTOR_BITS;
diff --git a/block/file-posix.c b/block/file-posix.c
index 10b71d9a13..e0e758e446 100644
--- a/block/file-posix.c
+++ b/block/file-posix.c
@@ -2009,9 +2009,9 @@ static int coroutine_fn raw_co_prw(BlockDriverState *bs, uint64_t offset,
return raw_thread_pool_submit(bs, handle_aiocb_rw, &acb);
}
-static int coroutine_fn raw_co_preadv(BlockDriverState *bs, uint64_t offset,
- uint64_t bytes, QEMUIOVector *qiov,
- int flags)
+static int coroutine_fn raw_co_preadv(BlockDriverState *bs, int64_t offset,
+ int64_t bytes, QEMUIOVector *qiov,
+ BdrvRequestFlags flags)
{
return raw_co_prw(bs, offset, bytes, qiov, QEMU_AIO_READ);
}
diff --git a/block/file-win32.c b/block/file-win32.c
index 2642088bd6..15076350f2 100644
--- a/block/file-win32.c
+++ b/block/file-win32.c
@@ -436,8 +436,8 @@ fail:
}
static BlockAIOCB *raw_aio_preadv(BlockDriverState *bs,
- uint64_t offset, uint64_t bytes,
- QEMUIOVector *qiov, int flags,
+ int64_t offset, int64_t bytes,
+ QEMUIOVector *qiov, BdrvRequestFlags flags,
BlockCompletionFunc *cb, void *opaque)
{
BDRVRawState *s = bs->opaque;
diff --git a/block/filter-compress.c b/block/filter-compress.c
index 5136371bf8..54a16c6c64 100644
--- a/block/filter-compress.c
+++ b/block/filter-compress.c
@@ -63,10 +63,10 @@ static int64_t compress_getlength(BlockDriverState *bs)
static int coroutine_fn compress_co_preadv_part(BlockDriverState *bs,
- uint64_t offset, uint64_t bytes,
+ int64_t offset, int64_t bytes,
QEMUIOVector *qiov,
size_t qiov_offset,
- int flags)
+ BdrvRequestFlags flags)
{
return bdrv_co_preadv_part(bs->file, offset, bytes, qiov, qiov_offset,
flags);
diff --git a/block/mirror.c b/block/mirror.c
index 840b8e8c15..684652092a 100644
--- a/block/mirror.c
+++ b/block/mirror.c
@@ -1380,7 +1380,7 @@ static void coroutine_fn active_write_settle(MirrorOp *op)
}
static int coroutine_fn bdrv_mirror_top_preadv(BlockDriverState *bs,
- uint64_t offset, uint64_t bytes, QEMUIOVector *qiov, int flags)
+ int64_t offset, int64_t bytes, QEMUIOVector *qiov, BdrvRequestFlags flags)
{
return bdrv_co_preadv(bs->backing, offset, bytes, qiov, flags);
}
diff --git a/block/nbd.c b/block/nbd.c
index 1d4668d42d..f1aac282e4 100644
--- a/block/nbd.c
+++ b/block/nbd.c
@@ -1545,8 +1545,9 @@ static int nbd_co_request(BlockDriverState *bs, NBDRequest *request,
return ret ? ret : request_ret;
}
-static int nbd_client_co_preadv(BlockDriverState *bs, uint64_t offset,
- uint64_t bytes, QEMUIOVector *qiov, int flags)
+static int nbd_client_co_preadv(BlockDriverState *bs, int64_t offset,
+ int64_t bytes, QEMUIOVector *qiov,
+ BdrvRequestFlags flags)
{
int ret, request_ret;
Error *local_err = NULL;
diff --git a/block/nfs.c b/block/nfs.c
index 8c1968bb41..eee8f706ba 100644
--- a/block/nfs.c
+++ b/block/nfs.c
@@ -265,9 +265,9 @@ nfs_co_generic_cb(int ret, struct nfs_context *nfs, void *data,
nfs_co_generic_bh_cb, task);
}
-static int coroutine_fn nfs_co_preadv(BlockDriverState *bs, uint64_t offset,
- uint64_t bytes, QEMUIOVector *iov,
- int flags)
+static int coroutine_fn nfs_co_preadv(BlockDriverState *bs, int64_t offset,
+ int64_t bytes, QEMUIOVector *iov,
+ BdrvRequestFlags flags)
{
NFSClient *client = bs->opaque;
NFSRPC task;
diff --git a/block/null.c b/block/null.c
index cc9b1d4ea7..343dbb580d 100644
--- a/block/null.c
+++ b/block/null.c
@@ -116,8 +116,9 @@ static coroutine_fn int null_co_common(BlockDriverState *bs)
}
static coroutine_fn int null_co_preadv(BlockDriverState *bs,
- uint64_t offset, uint64_t bytes,
- QEMUIOVector *qiov, int flags)
+ int64_t offset, int64_t bytes,
+ QEMUIOVector *qiov,
+ BdrvRequestFlags flags)
{
BDRVNullState *s = bs->opaque;
@@ -187,8 +188,8 @@ static inline BlockAIOCB *null_aio_common(BlockDriverState *bs,
}
static BlockAIOCB *null_aio_preadv(BlockDriverState *bs,
- uint64_t offset, uint64_t bytes,
- QEMUIOVector *qiov, int flags,
+ int64_t offset, int64_t bytes,
+ QEMUIOVector *qiov, BdrvRequestFlags flags,
BlockCompletionFunc *cb,
void *opaque)
{
diff --git a/block/nvme.c b/block/nvme.c
index 2b5421e7aa..58342c6409 100644
--- a/block/nvme.c
+++ b/block/nvme.c
@@ -1221,8 +1221,9 @@ static int nvme_co_prw(BlockDriverState *bs, uint64_t offset, uint64_t bytes,
}
static coroutine_fn int nvme_co_preadv(BlockDriverState *bs,
- uint64_t offset, uint64_t bytes,
- QEMUIOVector *qiov, int flags)
+ int64_t offset, int64_t bytes,
+ QEMUIOVector *qiov,
+ BdrvRequestFlags flags)
{
return nvme_co_prw(bs, offset, bytes, qiov, false, flags);
}
diff --git a/block/preallocate.c b/block/preallocate.c
index b619206304..5709443612 100644
--- a/block/preallocate.c
+++ b/block/preallocate.c
@@ -227,8 +227,8 @@ static void preallocate_reopen_abort(BDRVReopenState *state)
}
static coroutine_fn int preallocate_co_preadv_part(
- BlockDriverState *bs, uint64_t offset, uint64_t bytes,
- QEMUIOVector *qiov, size_t qiov_offset, int flags)
+ BlockDriverState *bs, int64_t offset, int64_t bytes,
+ QEMUIOVector *qiov, size_t qiov_offset, BdrvRequestFlags flags)
{
return bdrv_co_preadv_part(bs->file, offset, bytes, qiov, qiov_offset,
flags);
diff --git a/block/qcow.c b/block/qcow.c
index f8919a44d1..1151b8d79b 100644
--- a/block/qcow.c
+++ b/block/qcow.c
@@ -617,9 +617,9 @@ static void qcow_refresh_limits(BlockDriverState *bs, Error **errp)
bs->bl.request_alignment = BDRV_SECTOR_SIZE;
}
-static coroutine_fn int qcow_co_preadv(BlockDriverState *bs, uint64_t offset,
- uint64_t bytes, QEMUIOVector *qiov,
- int flags)
+static coroutine_fn int qcow_co_preadv(BlockDriverState *bs, int64_t offset,
+ int64_t bytes, QEMUIOVector *qiov,
+ BdrvRequestFlags flags)
{
BDRVQcowState *s = bs->opaque;
int offset_in_cluster;
diff --git a/block/qcow2-cluster.c b/block/qcow2-cluster.c
index bd0597842f..70adea9f59 100644
--- a/block/qcow2-cluster.c
+++ b/block/qcow2-cluster.c
@@ -505,7 +505,19 @@ static int coroutine_fn do_perform_cow_read(BlockDriverState *bs,
return -ENOMEDIUM;
}
- /* Call .bdrv_co_readv() directly instead of using the public block-layer
+ /*
+ * We never deal with requests that doesn't satisfy
+ * bdrv_check_qiov_request(), and aligning requests to clusters never break
+ * this condition. So, do some assertions before calling
+ * bs->drv->bdrv_co_preadv_part() which has int64_t arguments.
+ */
+ assert(src_cluster_offset <= INT64_MAX);
+ assert(src_cluster_offset + offset_in_cluster <= INT64_MAX);
+ assert(qiov->size <= INT64_MAX);
+ bdrv_check_qiov_request(src_cluster_offset + offset_in_cluster, qiov->size,
+ qiov, 0, &error_abort);
+ /*
+ * Call .bdrv_co_readv() directly instead of using the public block-layer
* interface. This avoids double I/O throttling and request tracking,
* which can lead to deadlock when block layer copy-on-read is enabled.
*/
diff --git a/block/qcow2.c b/block/qcow2.c
index 227885620d..35844beb46 100644
--- a/block/qcow2.c
+++ b/block/qcow2.c
@@ -2282,9 +2282,10 @@ static coroutine_fn int qcow2_co_preadv_task_entry(AioTask *task)
}
static coroutine_fn int qcow2_co_preadv_part(BlockDriverState *bs,
- uint64_t offset, uint64_t bytes,
+ int64_t offset, int64_t bytes,
QEMUIOVector *qiov,
- size_t qiov_offset, int flags)
+ size_t qiov_offset,
+ BdrvRequestFlags flags)
{
BDRVQcow2State *s = bs->opaque;
int ret = 0;
diff --git a/block/quorum.c b/block/quorum.c
index cfc1436abb..1eba2ce7ff 100644
--- a/block/quorum.c
+++ b/block/quorum.c
@@ -663,8 +663,8 @@ static int read_fifo_child(QuorumAIOCB *acb)
return ret;
}
-static int quorum_co_preadv(BlockDriverState *bs, uint64_t offset,
- uint64_t bytes, QEMUIOVector *qiov, int flags)
+static int quorum_co_preadv(BlockDriverState *bs, int64_t offset, int64_t bytes,
+ QEMUIOVector *qiov, BdrvRequestFlags flags)
{
BDRVQuorumState *s = bs->opaque;
QuorumAIOCB *acb = quorum_aio_get(bs, qiov, offset, bytes, flags);
diff --git a/block/raw-format.c b/block/raw-format.c
index 7717578ed6..e3f459b2cb 100644
--- a/block/raw-format.c
+++ b/block/raw-format.c
@@ -181,8 +181,8 @@ static void raw_reopen_abort(BDRVReopenState *state)
}
/* Check and adjust the offset, against 'offset' and 'size' options. */
-static inline int raw_adjust_offset(BlockDriverState *bs, uint64_t *offset,
- uint64_t bytes, bool is_write)
+static inline int raw_adjust_offset(BlockDriverState *bs, int64_t *offset,
+ int64_t bytes, bool is_write)
{
BDRVRawState *s = bs->opaque;
@@ -201,9 +201,9 @@ static inline int raw_adjust_offset(BlockDriverState *bs, uint64_t *offset,
return 0;
}
-static int coroutine_fn raw_co_preadv(BlockDriverState *bs, uint64_t offset,
- uint64_t bytes, QEMUIOVector *qiov,
- int flags)
+static int coroutine_fn raw_co_preadv(BlockDriverState *bs, int64_t offset,
+ int64_t bytes, QEMUIOVector *qiov,
+ BdrvRequestFlags flags)
{
int ret;
@@ -259,7 +259,7 @@ static int coroutine_fn raw_co_pwritev(BlockDriverState *bs, uint64_t offset,
qiov = &local_qiov;
}
- ret = raw_adjust_offset(bs, &offset, bytes, true);
+ ret = raw_adjust_offset(bs, (int64_t *)&offset, bytes, true);
if (ret) {
goto fail;
}
@@ -294,7 +294,7 @@ static int coroutine_fn raw_co_pwrite_zeroes(BlockDriverState *bs,
{
int ret;
- ret = raw_adjust_offset(bs, (uint64_t *)&offset, bytes, true);
+ ret = raw_adjust_offset(bs, (int64_t *)&offset, bytes, true);
if (ret) {
return ret;
}
@@ -306,7 +306,7 @@ static int coroutine_fn raw_co_pdiscard(BlockDriverState *bs,
{
int ret;
- ret = raw_adjust_offset(bs, (uint64_t *)&offset, bytes, true);
+ ret = raw_adjust_offset(bs, &offset, bytes, true);
if (ret) {
return ret;
}
@@ -541,7 +541,7 @@ static int coroutine_fn raw_co_copy_range_from(BlockDriverState *bs,
{
int ret;
- ret = raw_adjust_offset(bs, &src_offset, bytes, false);
+ ret = raw_adjust_offset(bs, (int64_t *)&src_offset, bytes, false);
if (ret) {
return ret;
}
@@ -560,7 +560,7 @@ static int coroutine_fn raw_co_copy_range_to(BlockDriverState *bs,
{
int ret;
- ret = raw_adjust_offset(bs, &dst_offset, bytes, true);
+ ret = raw_adjust_offset(bs, (int64_t *)&dst_offset, bytes, true);
if (ret) {
return ret;
}
diff --git a/block/rbd.c b/block/rbd.c
index f098a89c7b..6a937723f4 100644
--- a/block/rbd.c
+++ b/block/rbd.c
@@ -994,8 +994,9 @@ failed:
}
static BlockAIOCB *qemu_rbd_aio_preadv(BlockDriverState *bs,
- uint64_t offset, uint64_t bytes,
- QEMUIOVector *qiov, int flags,
+ int64_t offset, int64_t bytes,
+ QEMUIOVector *qiov,
+ BdrvRequestFlags flags,
BlockCompletionFunc *cb,
void *opaque)
{
diff --git a/block/throttle.c b/block/throttle.c
index b685166ad4..20362b5fe5 100644
--- a/block/throttle.c
+++ b/block/throttle.c
@@ -112,8 +112,9 @@ static int64_t throttle_getlength(BlockDriverState *bs)
}
static int coroutine_fn throttle_co_preadv(BlockDriverState *bs,
- uint64_t offset, uint64_t bytes,
- QEMUIOVector *qiov, int flags)
+ int64_t offset, int64_t bytes,
+ QEMUIOVector *qiov,
+ BdrvRequestFlags flags)
{
ThrottleGroupMember *tgm = bs->opaque;
diff --git a/block/vdi.c b/block/vdi.c
index 548f8a057b..b394cf6ca6 100644
--- a/block/vdi.c
+++ b/block/vdi.c
@@ -544,8 +544,8 @@ static int coroutine_fn vdi_co_block_status(BlockDriverState *bs,
}
static int coroutine_fn
-vdi_co_preadv(BlockDriverState *bs, uint64_t offset, uint64_t bytes,
- QEMUIOVector *qiov, int flags)
+vdi_co_preadv(BlockDriverState *bs, int64_t offset, int64_t bytes,
+ QEMUIOVector *qiov, BdrvRequestFlags flags)
{
BDRVVdiState *s = bs->opaque;
QEMUIOVector local_qiov;
diff --git a/block/vmdk.c b/block/vmdk.c
index 4499f136bd..78592160d0 100644
--- a/block/vmdk.c
+++ b/block/vmdk.c
@@ -1888,8 +1888,8 @@ static int vmdk_read_extent(VmdkExtent *extent, int64_t cluster_offset,
}
static int coroutine_fn
-vmdk_co_preadv(BlockDriverState *bs, uint64_t offset, uint64_t bytes,
- QEMUIOVector *qiov, int flags)
+vmdk_co_preadv(BlockDriverState *bs, int64_t offset, int64_t bytes,
+ QEMUIOVector *qiov, BdrvRequestFlags flags)
{
BDRVVmdkState *s = bs->opaque;
int ret;
diff --git a/block/vpc.c b/block/vpc.c
index 17a705b482..29c8517ff8 100644
--- a/block/vpc.c
+++ b/block/vpc.c
@@ -608,8 +608,8 @@ static int vpc_get_info(BlockDriverState *bs, BlockDriverInfo *bdi)
}
static int coroutine_fn
-vpc_co_preadv(BlockDriverState *bs, uint64_t offset, uint64_t bytes,
- QEMUIOVector *qiov, int flags)
+vpc_co_preadv(BlockDriverState *bs, int64_t offset, int64_t bytes,
+ QEMUIOVector *qiov, BdrvRequestFlags flags)
{
BDRVVPCState *s = bs->opaque;
int ret;
diff --git a/block/vvfat.c b/block/vvfat.c
index 54807f82ca..8ac90166c5 100644
--- a/block/vvfat.c
+++ b/block/vvfat.c
@@ -1522,8 +1522,8 @@ static int vvfat_read(BlockDriverState *bs, int64_t sector_num,
}
static int coroutine_fn
-vvfat_co_preadv(BlockDriverState *bs, uint64_t offset, uint64_t bytes,
- QEMUIOVector *qiov, int flags)
+vvfat_co_preadv(BlockDriverState *bs, int64_t offset, int64_t bytes,
+ QEMUIOVector *qiov, BdrvRequestFlags flags)
{
int ret;
BDRVVVFATState *s = bs->opaque;
diff --git a/tests/unit/test-bdrv-drain.c b/tests/unit/test-bdrv-drain.c
index 892f7f47d8..e3fc9ced3e 100644
--- a/tests/unit/test-bdrv-drain.c
+++ b/tests/unit/test-bdrv-drain.c
@@ -65,8 +65,9 @@ static void co_reenter_bh(void *opaque)
}
static int coroutine_fn bdrv_test_co_preadv(BlockDriverState *bs,
- uint64_t offset, uint64_t bytes,
- QEMUIOVector *qiov, int flags)
+ int64_t offset, int64_t bytes,
+ QEMUIOVector *qiov,
+ BdrvRequestFlags flags)
{
BDRVTestState *s = bs->opaque;
@@ -1105,8 +1106,9 @@ static void bdrv_test_top_close(BlockDriverState *bs)
}
static int coroutine_fn bdrv_test_top_co_preadv(BlockDriverState *bs,
- uint64_t offset, uint64_t bytes,
- QEMUIOVector *qiov, int flags)
+ int64_t offset, int64_t bytes,
+ QEMUIOVector *qiov,
+ BdrvRequestFlags flags)
{
BDRVTestTopState *tts = bs->opaque;
return bdrv_co_preadv(tts->wait_child, offset, bytes, qiov, flags);
@@ -1854,10 +1856,10 @@ static void bdrv_replace_test_close(BlockDriverState *bs)
* Set .has_read to true and return success.
*/
static int coroutine_fn bdrv_replace_test_co_preadv(BlockDriverState *bs,
- uint64_t offset,
- uint64_t bytes,
+ int64_t offset,
+ int64_t bytes,
QEMUIOVector *qiov,
- int flags)
+ BdrvRequestFlags flags)
{
BDRVReplaceTestState *s = bs->opaque;
diff --git a/tests/unit/test-block-iothread.c b/tests/unit/test-block-iothread.c
index 8cf172cb7a..b3f8f3ff8e 100644
--- a/tests/unit/test-block-iothread.c
+++ b/tests/unit/test-block-iothread.c
@@ -31,9 +31,18 @@
#include "qemu/main-loop.h"
#include "iothread.h"
-static int coroutine_fn bdrv_test_co_prwv(BlockDriverState *bs,
- uint64_t offset, uint64_t bytes,
- QEMUIOVector *qiov, int flags)
+static int coroutine_fn bdrv_test_co_preadv(BlockDriverState *bs,
+ int64_t offset, int64_t bytes,
+ QEMUIOVector *qiov,
+ BdrvRequestFlags flags)
+{
+ return 0;
+}
+
+static int coroutine_fn bdrv_test_co_pwritev(BlockDriverState *bs,
+ uint64_t offset, uint64_t bytes,
+ QEMUIOVector *qiov,
+ int flags)
{
return 0;
}
@@ -66,8 +75,8 @@ static BlockDriver bdrv_test = {
.format_name = "test",
.instance_size = 1,
- .bdrv_co_preadv = bdrv_test_co_prwv,
- .bdrv_co_pwritev = bdrv_test_co_prwv,
+ .bdrv_co_preadv = bdrv_test_co_preadv,
+ .bdrv_co_pwritev = bdrv_test_co_pwritev,
.bdrv_co_pdiscard = bdrv_test_co_pdiscard,
.bdrv_co_truncate = bdrv_test_co_truncate,
.bdrv_co_block_status = bdrv_test_co_block_status,
--
2.29.2
^ permalink raw reply related [flat|nested] 22+ messages in thread* [PATCH v5 04/11] block: use int64_t instead of uint64_t in driver write handlers
2021-05-05 7:49 [PATCH v5 00/11] 64bit block-layer: part II Vladimir Sementsov-Ogievskiy
` (2 preceding siblings ...)
2021-05-05 7:49 ` [PATCH v5 03/11] block: use int64_t instead of uint64_t in driver read handlers Vladimir Sementsov-Ogievskiy
@ 2021-05-05 7:49 ` Vladimir Sementsov-Ogievskiy
2021-05-05 7:49 ` [PATCH v5 05/11] block: use int64_t instead of uint64_t in copy_range driver handlers Vladimir Sementsov-Ogievskiy
` (8 subsequent siblings)
12 siblings, 0 replies; 22+ messages in thread
From: Vladimir Sementsov-Ogievskiy @ 2021-05-05 7:49 UTC (permalink / raw)
To: qemu-block
Cc: qemu-devel, eblake, stefanha, kwolf, mreitz, vsementsov,
John Snow, Ari Sundholm, Pavel Dovgalyuk, Paolo Bonzini,
Stefan Weil, Fam Zheng, Peter Lieven, Alberto Garcia,
Jason Dillaman
We are generally moving to int64_t for both offset and bytes parameters
on all io paths.
Main motivation is realization of 64-bit write_zeroes operation for
fast zeroing large disk chunks, up to the whole disk.
We chose signed type, to be consistent with off_t (which is signed) and
with possibility for signed return type (where negative value means
error).
So, convert driver write handlers parameters which are already 64bit to
signed type.
While being here, convert also flags parameter to be BdrvRequestFlags.
Now let's consider all callers. Simple
git grep '\->bdrv_\(aio\|co\)_pwritev\(_part\)\?'
shows that's there two callers of driver function:
bdrv_driver_pwritev() in block/io.c, passes int64_t, checked by
bdrv_check_qiov_request() to be non-negative.
qcow2_save_vmstate() does bdrv_check_qiov_request().
Still, the functions may be called directly, not only by drv->...
Let's check:
git grep '\.bdrv_\(aio\|co\)_pwritev\(_part\)\?\s*=' | \
awk '{print $4}' | sed 's/,//' | sed 's/&//' | sort | uniq | \
while read func; do git grep "$func(" | \
grep -v "$func(BlockDriverState"; done
shows several callers:
qcow2:
qcow2_co_truncate() write at most up to @offset, which is checked in
generic qcow2_co_truncate() by bdrv_check_request().
qcow2_co_pwritev_compressed_task() pass the request (or part of the
request) that already went through normal write path, so it should
be OK
qcow:
qcow_co_pwritev_compressed() pass int64_t, it's updated by this patch
quorum:
quorum_co_pwrite_zeroes() pass int64_t and int - OK
throttle:
throttle_co_pwritev_compressed() pass int64_t, it's updated by this
patch
vmdk:
vmdk_co_pwritev_compressed() pass int64_t, it's updated by this
patch
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
---
include/block/block_int.h | 16 ++++++++--------
block/backup-top.c | 6 +++---
block/blkdebug.c | 4 ++--
block/blklogwrites.c | 4 ++--
block/blkreplay.c | 2 +-
block/blkverify.c | 4 ++--
block/copy-on-read.c | 11 ++++++-----
block/crypto.c | 4 ++--
block/file-posix.c | 6 +++---
block/file-win32.c | 4 ++--
block/filter-compress.c | 7 ++++---
block/io.c | 6 ++++--
block/mirror.c | 2 +-
block/nbd.c | 5 +++--
block/nfs.c | 6 +++---
block/null.c | 9 +++++----
block/nvme.c | 5 +++--
block/preallocate.c | 6 +++---
block/qcow.c | 10 +++++-----
block/qcow2.c | 6 +++---
block/quorum.c | 5 +++--
block/raw-format.c | 10 +++++-----
block/rbd.c | 5 +++--
block/throttle.c | 9 +++++----
block/vdi.c | 4 ++--
block/vmdk.c | 8 ++++----
block/vpc.c | 4 ++--
block/vvfat.c | 8 ++++----
tests/unit/test-block-iothread.c | 4 ++--
block/trace-events | 2 +-
30 files changed, 96 insertions(+), 86 deletions(-)
diff --git a/include/block/block_int.h b/include/block/block_int.h
index dc08f99e95..38ce897972 100644
--- a/include/block/block_int.h
+++ b/include/block/block_int.h
@@ -237,8 +237,8 @@ struct BlockDriver {
int64_t offset, int64_t bytes, QEMUIOVector *qiov,
BdrvRequestFlags flags, BlockCompletionFunc *cb, void *opaque);
BlockAIOCB *(*bdrv_aio_pwritev)(BlockDriverState *bs,
- uint64_t offset, uint64_t bytes, QEMUIOVector *qiov, int flags,
- BlockCompletionFunc *cb, void *opaque);
+ int64_t offset, int64_t bytes, QEMUIOVector *qiov,
+ BdrvRequestFlags flags, BlockCompletionFunc *cb, void *opaque);
BlockAIOCB *(*bdrv_aio_flush)(BlockDriverState *bs,
BlockCompletionFunc *cb, void *opaque);
BlockAIOCB *(*bdrv_aio_pdiscard)(BlockDriverState *bs,
@@ -287,10 +287,11 @@ struct BlockDriver {
* The buffer in @qiov may point directly to guest memory.
*/
int coroutine_fn (*bdrv_co_pwritev)(BlockDriverState *bs,
- uint64_t offset, uint64_t bytes, QEMUIOVector *qiov, int flags);
+ int64_t offset, int64_t bytes, QEMUIOVector *qiov,
+ BdrvRequestFlags flags);
int coroutine_fn (*bdrv_co_pwritev_part)(BlockDriverState *bs,
- uint64_t offset, uint64_t bytes,
- QEMUIOVector *qiov, size_t qiov_offset, int flags);
+ int64_t offset, int64_t bytes, QEMUIOVector *qiov, size_t qiov_offset,
+ BdrvRequestFlags flags);
/*
* Efficiently zero a region of the disk image. Typically an image format
@@ -428,10 +429,9 @@ struct BlockDriver {
Error **errp);
int coroutine_fn (*bdrv_co_pwritev_compressed)(BlockDriverState *bs,
- uint64_t offset, uint64_t bytes, QEMUIOVector *qiov);
+ int64_t offset, int64_t bytes, QEMUIOVector *qiov);
int coroutine_fn (*bdrv_co_pwritev_compressed_part)(BlockDriverState *bs,
- uint64_t offset, uint64_t bytes, QEMUIOVector *qiov,
- size_t qiov_offset);
+ int64_t offset, int64_t bytes, QEMUIOVector *qiov, size_t qiov_offset);
int (*bdrv_snapshot_create)(BlockDriverState *bs,
QEMUSnapshotInfo *sn_info);
diff --git a/block/backup-top.c b/block/backup-top.c
index fb32ac7b2b..6834921092 100644
--- a/block/backup-top.c
+++ b/block/backup-top.c
@@ -86,9 +86,9 @@ static int coroutine_fn backup_top_co_pwrite_zeroes(BlockDriverState *bs,
}
static coroutine_fn int backup_top_co_pwritev(BlockDriverState *bs,
- uint64_t offset,
- uint64_t bytes,
- QEMUIOVector *qiov, int flags)
+ int64_t offset, int64_t bytes,
+ QEMUIOVector *qiov,
+ BdrvRequestFlags flags)
{
int ret = backup_top_cbw(bs, offset, bytes, flags);
if (ret < 0) {
diff --git a/block/blkdebug.c b/block/blkdebug.c
index b26fecf222..a7fedd80fd 100644
--- a/block/blkdebug.c
+++ b/block/blkdebug.c
@@ -635,8 +635,8 @@ blkdebug_co_preadv(BlockDriverState *bs, int64_t offset, int64_t bytes,
}
static int coroutine_fn
-blkdebug_co_pwritev(BlockDriverState *bs, uint64_t offset, uint64_t bytes,
- QEMUIOVector *qiov, int flags)
+blkdebug_co_pwritev(BlockDriverState *bs, int64_t offset, int64_t bytes,
+ QEMUIOVector *qiov, BdrvRequestFlags flags)
{
int err;
diff --git a/block/blklogwrites.c b/block/blklogwrites.c
index de3d4ba2b6..ca174ab135 100644
--- a/block/blklogwrites.c
+++ b/block/blklogwrites.c
@@ -460,8 +460,8 @@ blk_log_writes_co_do_file_pdiscard(BlkLogWritesFileReq *fr)
}
static int coroutine_fn
-blk_log_writes_co_pwritev(BlockDriverState *bs, uint64_t offset, uint64_t bytes,
- QEMUIOVector *qiov, int flags)
+blk_log_writes_co_pwritev(BlockDriverState *bs, int64_t offset, int64_t bytes,
+ QEMUIOVector *qiov, BdrvRequestFlags flags)
{
return blk_log_writes_co_log(bs, offset, bytes, qiov, flags,
blk_log_writes_co_do_file_pwritev, 0, false);
diff --git a/block/blkreplay.c b/block/blkreplay.c
index 13ea2166bb..7ba62dcac1 100644
--- a/block/blkreplay.c
+++ b/block/blkreplay.c
@@ -83,7 +83,7 @@ static int coroutine_fn blkreplay_co_preadv(BlockDriverState *bs,
}
static int coroutine_fn blkreplay_co_pwritev(BlockDriverState *bs,
- uint64_t offset, uint64_t bytes, QEMUIOVector *qiov, int flags)
+ int64_t offset, int64_t bytes, QEMUIOVector *qiov, BdrvRequestFlags flags)
{
uint64_t reqid = blkreplay_next_id();
int ret = bdrv_co_pwritev(bs->file, offset, bytes, qiov, flags);
diff --git a/block/blkverify.c b/block/blkverify.c
index 5e35744b8a..d1facf5ba9 100644
--- a/block/blkverify.c
+++ b/block/blkverify.c
@@ -250,8 +250,8 @@ blkverify_co_preadv(BlockDriverState *bs, int64_t offset, int64_t bytes,
}
static int coroutine_fn
-blkverify_co_pwritev(BlockDriverState *bs, uint64_t offset, uint64_t bytes,
- QEMUIOVector *qiov, int flags)
+blkverify_co_pwritev(BlockDriverState *bs, int64_t offset, int64_t bytes,
+ QEMUIOVector *qiov, BdrvRequestFlags flags)
{
BlkverifyRequest r;
return blkverify_co_prwv(bs, &r, offset, bytes, qiov, qiov, flags, true);
diff --git a/block/copy-on-read.c b/block/copy-on-read.c
index afb2a77b08..7675565080 100644
--- a/block/copy-on-read.c
+++ b/block/copy-on-read.c
@@ -194,10 +194,11 @@ static int coroutine_fn cor_co_preadv_part(BlockDriverState *bs,
static int coroutine_fn cor_co_pwritev_part(BlockDriverState *bs,
- uint64_t offset,
- uint64_t bytes,
+ int64_t offset,
+ int64_t bytes,
QEMUIOVector *qiov,
- size_t qiov_offset, int flags)
+ size_t qiov_offset,
+ BdrvRequestFlags flags)
{
return bdrv_co_pwritev_part(bs->file, offset, bytes, qiov, qiov_offset,
flags);
@@ -220,8 +221,8 @@ static int coroutine_fn cor_co_pdiscard(BlockDriverState *bs,
static int coroutine_fn cor_co_pwritev_compressed(BlockDriverState *bs,
- uint64_t offset,
- uint64_t bytes,
+ int64_t offset,
+ int64_t bytes,
QEMUIOVector *qiov)
{
return bdrv_co_pwritev(bs->file, offset, bytes, qiov,
diff --git a/block/crypto.c b/block/crypto.c
index a732a36d10..c8ba4681e2 100644
--- a/block/crypto.c
+++ b/block/crypto.c
@@ -460,8 +460,8 @@ block_crypto_co_preadv(BlockDriverState *bs, int64_t offset, int64_t bytes,
static coroutine_fn int
-block_crypto_co_pwritev(BlockDriverState *bs, uint64_t offset, uint64_t bytes,
- QEMUIOVector *qiov, int flags)
+block_crypto_co_pwritev(BlockDriverState *bs, int64_t offset, int64_t bytes,
+ QEMUIOVector *qiov, BdrvRequestFlags flags)
{
BlockCrypto *crypto = bs->opaque;
uint64_t cur_bytes; /* number of bytes in current iteration */
diff --git a/block/file-posix.c b/block/file-posix.c
index e0e758e446..9771eafe5e 100644
--- a/block/file-posix.c
+++ b/block/file-posix.c
@@ -2016,9 +2016,9 @@ static int coroutine_fn raw_co_preadv(BlockDriverState *bs, int64_t offset,
return raw_co_prw(bs, offset, bytes, qiov, QEMU_AIO_READ);
}
-static int coroutine_fn raw_co_pwritev(BlockDriverState *bs, uint64_t offset,
- uint64_t bytes, QEMUIOVector *qiov,
- int flags)
+static int coroutine_fn raw_co_pwritev(BlockDriverState *bs, int64_t offset,
+ int64_t bytes, QEMUIOVector *qiov,
+ BdrvRequestFlags flags)
{
assert(flags == 0);
return raw_co_prw(bs, offset, bytes, qiov, QEMU_AIO_WRITE);
diff --git a/block/file-win32.c b/block/file-win32.c
index 15076350f2..7c2706c329 100644
--- a/block/file-win32.c
+++ b/block/file-win32.c
@@ -451,8 +451,8 @@ static BlockAIOCB *raw_aio_preadv(BlockDriverState *bs,
}
static BlockAIOCB *raw_aio_pwritev(BlockDriverState *bs,
- uint64_t offset, uint64_t bytes,
- QEMUIOVector *qiov, int flags,
+ int64_t offset, int64_t bytes,
+ QEMUIOVector *qiov, BdrvRequestFlags flags,
BlockCompletionFunc *cb, void *opaque)
{
BDRVRawState *s = bs->opaque;
diff --git a/block/filter-compress.c b/block/filter-compress.c
index 54a16c6c64..505822a44f 100644
--- a/block/filter-compress.c
+++ b/block/filter-compress.c
@@ -74,10 +74,11 @@ static int coroutine_fn compress_co_preadv_part(BlockDriverState *bs,
static int coroutine_fn compress_co_pwritev_part(BlockDriverState *bs,
- uint64_t offset,
- uint64_t bytes,
+ int64_t offset,
+ int64_t bytes,
QEMUIOVector *qiov,
- size_t qiov_offset, int flags)
+ size_t qiov_offset,
+ BdrvRequestFlags flags)
{
return bdrv_co_pwritev_part(bs->file, offset, bytes, qiov, qiov_offset,
flags | BDRV_REQ_WRITE_COMPRESSED);
diff --git a/block/io.c b/block/io.c
index 932a26f0bb..448251beaa 100644
--- a/block/io.c
+++ b/block/io.c
@@ -1225,7 +1225,8 @@ out:
static int coroutine_fn bdrv_driver_pwritev(BlockDriverState *bs,
int64_t offset, int64_t bytes,
QEMUIOVector *qiov,
- size_t qiov_offset, int flags)
+ size_t qiov_offset,
+ BdrvRequestFlags flags)
{
BlockDriver *drv = bs->drv;
int64_t sector_num;
@@ -2064,7 +2065,8 @@ bdrv_co_write_req_finish(BdrvChild *child, int64_t offset, int64_t bytes,
*/
static int coroutine_fn bdrv_aligned_pwritev(BdrvChild *child,
BdrvTrackedRequest *req, int64_t offset, int64_t bytes,
- int64_t align, QEMUIOVector *qiov, size_t qiov_offset, int flags)
+ int64_t align, QEMUIOVector *qiov, size_t qiov_offset,
+ BdrvRequestFlags flags)
{
BlockDriverState *bs = child->bs;
BlockDriver *drv = bs->drv;
diff --git a/block/mirror.c b/block/mirror.c
index 684652092a..fdf477a0fd 100644
--- a/block/mirror.c
+++ b/block/mirror.c
@@ -1434,7 +1434,7 @@ out:
}
static int coroutine_fn bdrv_mirror_top_pwritev(BlockDriverState *bs,
- uint64_t offset, uint64_t bytes, QEMUIOVector *qiov, int flags)
+ int64_t offset, int64_t bytes, QEMUIOVector *qiov, BdrvRequestFlags flags)
{
MirrorBDSOpaque *s = bs->opaque;
QEMUIOVector bounce_qiov;
diff --git a/block/nbd.c b/block/nbd.c
index f1aac282e4..d3de441c2b 100644
--- a/block/nbd.c
+++ b/block/nbd.c
@@ -1604,8 +1604,9 @@ static int nbd_client_co_preadv(BlockDriverState *bs, int64_t offset,
return ret ? ret : request_ret;
}
-static int nbd_client_co_pwritev(BlockDriverState *bs, uint64_t offset,
- uint64_t bytes, QEMUIOVector *qiov, int flags)
+static int nbd_client_co_pwritev(BlockDriverState *bs, int64_t offset,
+ int64_t bytes, QEMUIOVector *qiov,
+ BdrvRequestFlags flags)
{
BDRVNBDState *s = (BDRVNBDState *)bs->opaque;
NBDRequest request = {
diff --git a/block/nfs.c b/block/nfs.c
index eee8f706ba..c6563930cf 100644
--- a/block/nfs.c
+++ b/block/nfs.c
@@ -299,9 +299,9 @@ static int coroutine_fn nfs_co_preadv(BlockDriverState *bs, int64_t offset,
return 0;
}
-static int coroutine_fn nfs_co_pwritev(BlockDriverState *bs, uint64_t offset,
- uint64_t bytes, QEMUIOVector *iov,
- int flags)
+static int coroutine_fn nfs_co_pwritev(BlockDriverState *bs, int64_t offset,
+ int64_t bytes, QEMUIOVector *iov,
+ BdrvRequestFlags flags)
{
NFSClient *client = bs->opaque;
NFSRPC task;
diff --git a/block/null.c b/block/null.c
index 343dbb580d..75f7d0db40 100644
--- a/block/null.c
+++ b/block/null.c
@@ -130,8 +130,9 @@ static coroutine_fn int null_co_preadv(BlockDriverState *bs,
}
static coroutine_fn int null_co_pwritev(BlockDriverState *bs,
- uint64_t offset, uint64_t bytes,
- QEMUIOVector *qiov, int flags)
+ int64_t offset, int64_t bytes,
+ QEMUIOVector *qiov,
+ BdrvRequestFlags flags)
{
return null_co_common(bs);
}
@@ -203,8 +204,8 @@ static BlockAIOCB *null_aio_preadv(BlockDriverState *bs,
}
static BlockAIOCB *null_aio_pwritev(BlockDriverState *bs,
- uint64_t offset, uint64_t bytes,
- QEMUIOVector *qiov, int flags,
+ int64_t offset, int64_t bytes,
+ QEMUIOVector *qiov, BdrvRequestFlags flags,
BlockCompletionFunc *cb,
void *opaque)
{
diff --git a/block/nvme.c b/block/nvme.c
index 58342c6409..349c152ab5 100644
--- a/block/nvme.c
+++ b/block/nvme.c
@@ -1229,8 +1229,9 @@ static coroutine_fn int nvme_co_preadv(BlockDriverState *bs,
}
static coroutine_fn int nvme_co_pwritev(BlockDriverState *bs,
- uint64_t offset, uint64_t bytes,
- QEMUIOVector *qiov, int flags)
+ int64_t offset, int64_t bytes,
+ QEMUIOVector *qiov,
+ BdrvRequestFlags flags)
{
return nvme_co_prw(bs, offset, bytes, qiov, true, flags);
}
diff --git a/block/preallocate.c b/block/preallocate.c
index 5709443612..c19885af17 100644
--- a/block/preallocate.c
+++ b/block/preallocate.c
@@ -349,11 +349,11 @@ static int coroutine_fn preallocate_co_pwrite_zeroes(BlockDriverState *bs,
}
static coroutine_fn int preallocate_co_pwritev_part(BlockDriverState *bs,
- uint64_t offset,
- uint64_t bytes,
+ int64_t offset,
+ int64_t bytes,
QEMUIOVector *qiov,
size_t qiov_offset,
- int flags)
+ BdrvRequestFlags flags)
{
handle_write(bs, offset, bytes, false);
diff --git a/block/qcow.c b/block/qcow.c
index 1151b8d79b..c39940f33e 100644
--- a/block/qcow.c
+++ b/block/qcow.c
@@ -714,9 +714,9 @@ static coroutine_fn int qcow_co_preadv(BlockDriverState *bs, int64_t offset,
return ret;
}
-static coroutine_fn int qcow_co_pwritev(BlockDriverState *bs, uint64_t offset,
- uint64_t bytes, QEMUIOVector *qiov,
- int flags)
+static coroutine_fn int qcow_co_pwritev(BlockDriverState *bs, int64_t offset,
+ int64_t bytes, QEMUIOVector *qiov,
+ BdrvRequestFlags flags)
{
BDRVQcowState *s = bs->opaque;
int offset_in_cluster;
@@ -1047,8 +1047,8 @@ static int qcow_make_empty(BlockDriverState *bs)
/* XXX: put compressed sectors first, then all the cluster aligned
tables to avoid losing bytes in alignment */
static coroutine_fn int
-qcow_co_pwritev_compressed(BlockDriverState *bs, uint64_t offset,
- uint64_t bytes, QEMUIOVector *qiov)
+qcow_co_pwritev_compressed(BlockDriverState *bs, int64_t offset, int64_t bytes,
+ QEMUIOVector *qiov)
{
BDRVQcowState *s = bs->opaque;
z_stream strm;
diff --git a/block/qcow2.c b/block/qcow2.c
index 35844beb46..5bab24d1dc 100644
--- a/block/qcow2.c
+++ b/block/qcow2.c
@@ -2569,8 +2569,8 @@ static coroutine_fn int qcow2_co_pwritev_task_entry(AioTask *task)
}
static coroutine_fn int qcow2_co_pwritev_part(
- BlockDriverState *bs, uint64_t offset, uint64_t bytes,
- QEMUIOVector *qiov, size_t qiov_offset, int flags)
+ BlockDriverState *bs, int64_t offset, int64_t bytes,
+ QEMUIOVector *qiov, size_t qiov_offset, BdrvRequestFlags flags)
{
BDRVQcow2State *s = bs->opaque;
int offset_in_cluster;
@@ -4603,7 +4603,7 @@ static coroutine_fn int qcow2_co_pwritev_compressed_task_entry(AioTask *task)
*/
static coroutine_fn int
qcow2_co_pwritev_compressed_part(BlockDriverState *bs,
- uint64_t offset, uint64_t bytes,
+ int64_t offset, int64_t bytes,
QEMUIOVector *qiov, size_t qiov_offset)
{
BDRVQcow2State *s = bs->opaque;
diff --git a/block/quorum.c b/block/quorum.c
index 1eba2ce7ff..353401ac08 100644
--- a/block/quorum.c
+++ b/block/quorum.c
@@ -714,8 +714,9 @@ static void write_quorum_entry(void *opaque)
}
}
-static int quorum_co_pwritev(BlockDriverState *bs, uint64_t offset,
- uint64_t bytes, QEMUIOVector *qiov, int flags)
+static int quorum_co_pwritev(BlockDriverState *bs, int64_t offset,
+ int64_t bytes, QEMUIOVector *qiov,
+ BdrvRequestFlags flags)
{
BDRVQuorumState *s = bs->opaque;
QuorumAIOCB *acb = quorum_aio_get(bs, qiov, offset, bytes, flags);
diff --git a/block/raw-format.c b/block/raw-format.c
index e3f459b2cb..b0fe75f54a 100644
--- a/block/raw-format.c
+++ b/block/raw-format.c
@@ -216,9 +216,9 @@ static int coroutine_fn raw_co_preadv(BlockDriverState *bs, int64_t offset,
return bdrv_co_preadv(bs->file, offset, bytes, qiov, flags);
}
-static int coroutine_fn raw_co_pwritev(BlockDriverState *bs, uint64_t offset,
- uint64_t bytes, QEMUIOVector *qiov,
- int flags)
+static int coroutine_fn raw_co_pwritev(BlockDriverState *bs, int64_t offset,
+ int64_t bytes, QEMUIOVector *qiov,
+ BdrvRequestFlags flags)
{
void *buf = NULL;
BlockDriver *drv;
@@ -259,7 +259,7 @@ static int coroutine_fn raw_co_pwritev(BlockDriverState *bs, uint64_t offset,
qiov = &local_qiov;
}
- ret = raw_adjust_offset(bs, (int64_t *)&offset, bytes, true);
+ ret = raw_adjust_offset(bs, &offset, bytes, true);
if (ret) {
goto fail;
}
@@ -294,7 +294,7 @@ static int coroutine_fn raw_co_pwrite_zeroes(BlockDriverState *bs,
{
int ret;
- ret = raw_adjust_offset(bs, (int64_t *)&offset, bytes, true);
+ ret = raw_adjust_offset(bs, &offset, bytes, true);
if (ret) {
return ret;
}
diff --git a/block/rbd.c b/block/rbd.c
index 6a937723f4..3936d7888a 100644
--- a/block/rbd.c
+++ b/block/rbd.c
@@ -1005,8 +1005,9 @@ static BlockAIOCB *qemu_rbd_aio_preadv(BlockDriverState *bs,
}
static BlockAIOCB *qemu_rbd_aio_pwritev(BlockDriverState *bs,
- uint64_t offset, uint64_t bytes,
- QEMUIOVector *qiov, int flags,
+ int64_t offset, int64_t bytes,
+ QEMUIOVector *qiov,
+ BdrvRequestFlags flags,
BlockCompletionFunc *cb,
void *opaque)
{
diff --git a/block/throttle.c b/block/throttle.c
index 20362b5fe5..1330e844c3 100644
--- a/block/throttle.c
+++ b/block/throttle.c
@@ -124,8 +124,9 @@ static int coroutine_fn throttle_co_preadv(BlockDriverState *bs,
}
static int coroutine_fn throttle_co_pwritev(BlockDriverState *bs,
- uint64_t offset, uint64_t bytes,
- QEMUIOVector *qiov, int flags)
+ int64_t offset, int64_t bytes,
+ QEMUIOVector *qiov,
+ BdrvRequestFlags flags)
{
ThrottleGroupMember *tgm = bs->opaque;
throttle_group_co_io_limits_intercept(tgm, bytes, true);
@@ -153,8 +154,8 @@ static int coroutine_fn throttle_co_pdiscard(BlockDriverState *bs,
}
static int coroutine_fn throttle_co_pwritev_compressed(BlockDriverState *bs,
- uint64_t offset,
- uint64_t bytes,
+ int64_t offset,
+ int64_t bytes,
QEMUIOVector *qiov)
{
return throttle_co_pwritev(bs, offset, bytes, qiov,
diff --git a/block/vdi.c b/block/vdi.c
index b394cf6ca6..bdc58d726e 100644
--- a/block/vdi.c
+++ b/block/vdi.c
@@ -600,8 +600,8 @@ vdi_co_preadv(BlockDriverState *bs, int64_t offset, int64_t bytes,
}
static int coroutine_fn
-vdi_co_pwritev(BlockDriverState *bs, uint64_t offset, uint64_t bytes,
- QEMUIOVector *qiov, int flags)
+vdi_co_pwritev(BlockDriverState *bs, int64_t offset, int64_t bytes,
+ QEMUIOVector *qiov, BdrvRequestFlags flags)
{
BDRVVdiState *s = bs->opaque;
QEMUIOVector local_qiov;
diff --git a/block/vmdk.c b/block/vmdk.c
index 78592160d0..8d49e54bdd 100644
--- a/block/vmdk.c
+++ b/block/vmdk.c
@@ -2068,8 +2068,8 @@ static int vmdk_pwritev(BlockDriverState *bs, uint64_t offset,
}
static int coroutine_fn
-vmdk_co_pwritev(BlockDriverState *bs, uint64_t offset, uint64_t bytes,
- QEMUIOVector *qiov, int flags)
+vmdk_co_pwritev(BlockDriverState *bs, int64_t offset, int64_t bytes,
+ QEMUIOVector *qiov, BdrvRequestFlags flags)
{
int ret;
BDRVVmdkState *s = bs->opaque;
@@ -2080,8 +2080,8 @@ vmdk_co_pwritev(BlockDriverState *bs, uint64_t offset, uint64_t bytes,
}
static int coroutine_fn
-vmdk_co_pwritev_compressed(BlockDriverState *bs, uint64_t offset,
- uint64_t bytes, QEMUIOVector *qiov)
+vmdk_co_pwritev_compressed(BlockDriverState *bs, int64_t offset, int64_t bytes,
+ QEMUIOVector *qiov)
{
if (bytes == 0) {
/* The caller will write bytes 0 to signal EOF.
diff --git a/block/vpc.c b/block/vpc.c
index 29c8517ff8..1b4c7333af 100644
--- a/block/vpc.c
+++ b/block/vpc.c
@@ -658,8 +658,8 @@ fail:
}
static int coroutine_fn
-vpc_co_pwritev(BlockDriverState *bs, uint64_t offset, uint64_t bytes,
- QEMUIOVector *qiov, int flags)
+vpc_co_pwritev(BlockDriverState *bs, int64_t offset, int64_t bytes,
+ QEMUIOVector *qiov, BdrvRequestFlags flags)
{
BDRVVPCState *s = bs->opaque;
int64_t image_offset;
diff --git a/block/vvfat.c b/block/vvfat.c
index 8ac90166c5..0b6ed1c6d1 100644
--- a/block/vvfat.c
+++ b/block/vvfat.c
@@ -3061,8 +3061,8 @@ DLOG(checkpoint());
}
static int coroutine_fn
-vvfat_co_pwritev(BlockDriverState *bs, uint64_t offset, uint64_t bytes,
- QEMUIOVector *qiov, int flags)
+vvfat_co_pwritev(BlockDriverState *bs, int64_t offset, int64_t bytes,
+ QEMUIOVector *qiov, BdrvRequestFlags flags)
{
int ret;
BDRVVVFATState *s = bs->opaque;
@@ -3099,8 +3099,8 @@ static int coroutine_fn vvfat_co_block_status(BlockDriverState *bs,
}
static int coroutine_fn
-write_target_commit(BlockDriverState *bs, uint64_t offset, uint64_t bytes,
- QEMUIOVector *qiov, int flags)
+write_target_commit(BlockDriverState *bs, int64_t offset, int64_t bytes,
+ QEMUIOVector *qiov, BdrvRequestFlags flags)
{
int ret;
diff --git a/tests/unit/test-block-iothread.c b/tests/unit/test-block-iothread.c
index b3f8f3ff8e..50b8718b2a 100644
--- a/tests/unit/test-block-iothread.c
+++ b/tests/unit/test-block-iothread.c
@@ -40,9 +40,9 @@ static int coroutine_fn bdrv_test_co_preadv(BlockDriverState *bs,
}
static int coroutine_fn bdrv_test_co_pwritev(BlockDriverState *bs,
- uint64_t offset, uint64_t bytes,
+ int64_t offset, int64_t bytes,
QEMUIOVector *qiov,
- int flags)
+ BdrvRequestFlags flags)
{
return 0;
}
diff --git a/block/trace-events b/block/trace-events
index 1a12d634e2..3cbea9e2e2 100644
--- a/block/trace-events
+++ b/block/trace-events
@@ -75,7 +75,7 @@ luring_resubmit_short_read(void *s, void *luringcb, int nread) "LuringState %p l
# qcow2.c
qcow2_add_task(void *co, void *bs, void *pool, const char *action, int cluster_type, uint64_t host_offset, uint64_t offset, uint64_t bytes, void *qiov, size_t qiov_offset) "co %p bs %p pool %p: %s: cluster_type %d file_cluster_offset %" PRIu64 " offset %" PRIu64 " bytes %" PRIu64 " qiov %p qiov_offset %zu"
-qcow2_writev_start_req(void *co, int64_t offset, int bytes) "co %p offset 0x%" PRIx64 " bytes %d"
+qcow2_writev_start_req(void *co, int64_t offset, int64_t bytes) "co %p offset 0x%" PRIx64 " bytes %" PRId64
qcow2_writev_done_req(void *co, int ret) "co %p ret %d"
qcow2_writev_start_part(void *co) "co %p"
qcow2_writev_done_part(void *co, int cur_bytes) "co %p cur_bytes %d"
--
2.29.2
^ permalink raw reply related [flat|nested] 22+ messages in thread* [PATCH v5 05/11] block: use int64_t instead of uint64_t in copy_range driver handlers
2021-05-05 7:49 [PATCH v5 00/11] 64bit block-layer: part II Vladimir Sementsov-Ogievskiy
` (3 preceding siblings ...)
2021-05-05 7:49 ` [PATCH v5 04/11] block: use int64_t instead of uint64_t in driver write handlers Vladimir Sementsov-Ogievskiy
@ 2021-05-05 7:49 ` Vladimir Sementsov-Ogievskiy
2021-05-05 7:49 ` [PATCH v5 06/11] block: make BlockLimits::max_pwrite_zeroes 64bit Vladimir Sementsov-Ogievskiy
` (7 subsequent siblings)
12 siblings, 0 replies; 22+ messages in thread
From: Vladimir Sementsov-Ogievskiy @ 2021-05-05 7:49 UTC (permalink / raw)
To: qemu-block
Cc: qemu-devel, eblake, stefanha, kwolf, mreitz, vsementsov,
Ronnie Sahlberg, Paolo Bonzini, Peter Lieven
We are generally moving to int64_t for both offset and bytes parameters
on all io paths.
Main motivation is realization of 64-bit write_zeroes operation for
fast zeroing large disk chunks, up to the whole disk.
We chose signed type, to be consistent with off_t (which is signed) and
with possibility for signed return type (where negative value means
error).
So, convert driver copy_range handlers parameters which are already
64bit to signed type.
Now let's consider all callers. Simple
git grep '\->bdrv_co_copy_range'
shows the only caller:
bdrv_co_copy_range_internal(), which doesn bdrv_check_request32(),
so everything is OK.
Still, the functions may be called directly, not only by drv->...
Let's check:
git grep '\.bdrv_co_copy_range_\(from\|to\)\s*=' | \
awk '{print $4}' | sed 's/,//' | sed 's/&//' | sort | uniq | \
while read func; do git grep "$func(" | \
grep -v "$func(BlockDriverState"; done
shows no more callers. So, we are done.
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
---
include/block/block_int.h | 12 ++++++------
block/file-posix.c | 10 +++++-----
block/iscsi.c | 12 ++++++------
block/qcow2.c | 12 ++++++------
block/raw-format.c | 16 ++++++++--------
5 files changed, 31 insertions(+), 31 deletions(-)
diff --git a/include/block/block_int.h b/include/block/block_int.h
index 38ce897972..b614db5cf9 100644
--- a/include/block/block_int.h
+++ b/include/block/block_int.h
@@ -313,10 +313,10 @@ struct BlockDriver {
*/
int coroutine_fn (*bdrv_co_copy_range_from)(BlockDriverState *bs,
BdrvChild *src,
- uint64_t offset,
+ int64_t offset,
BdrvChild *dst,
- uint64_t dst_offset,
- uint64_t bytes,
+ int64_t dst_offset,
+ int64_t bytes,
BdrvRequestFlags read_flags,
BdrvRequestFlags write_flags);
@@ -330,10 +330,10 @@ struct BlockDriver {
*/
int coroutine_fn (*bdrv_co_copy_range_to)(BlockDriverState *bs,
BdrvChild *src,
- uint64_t src_offset,
+ int64_t src_offset,
BdrvChild *dst,
- uint64_t dst_offset,
- uint64_t bytes,
+ int64_t dst_offset,
+ int64_t bytes,
BdrvRequestFlags read_flags,
BdrvRequestFlags write_flags);
diff --git a/block/file-posix.c b/block/file-posix.c
index 9771eafe5e..df1b3c98c8 100644
--- a/block/file-posix.c
+++ b/block/file-posix.c
@@ -3134,8 +3134,8 @@ static void raw_abort_perm_update(BlockDriverState *bs)
}
static int coroutine_fn raw_co_copy_range_from(
- BlockDriverState *bs, BdrvChild *src, uint64_t src_offset,
- BdrvChild *dst, uint64_t dst_offset, uint64_t bytes,
+ BlockDriverState *bs, BdrvChild *src, int64_t src_offset,
+ BdrvChild *dst, int64_t dst_offset, int64_t bytes,
BdrvRequestFlags read_flags, BdrvRequestFlags write_flags)
{
return bdrv_co_copy_range_to(src, src_offset, dst, dst_offset, bytes,
@@ -3144,10 +3144,10 @@ static int coroutine_fn raw_co_copy_range_from(
static int coroutine_fn raw_co_copy_range_to(BlockDriverState *bs,
BdrvChild *src,
- uint64_t src_offset,
+ int64_t src_offset,
BdrvChild *dst,
- uint64_t dst_offset,
- uint64_t bytes,
+ int64_t dst_offset,
+ int64_t bytes,
BdrvRequestFlags read_flags,
BdrvRequestFlags write_flags)
{
diff --git a/block/iscsi.c b/block/iscsi.c
index 4d2a416ce7..6bcde6ec6b 100644
--- a/block/iscsi.c
+++ b/block/iscsi.c
@@ -2172,10 +2172,10 @@ static void coroutine_fn iscsi_co_invalidate_cache(BlockDriverState *bs,
static int coroutine_fn iscsi_co_copy_range_from(BlockDriverState *bs,
BdrvChild *src,
- uint64_t src_offset,
+ int64_t src_offset,
BdrvChild *dst,
- uint64_t dst_offset,
- uint64_t bytes,
+ int64_t dst_offset,
+ int64_t bytes,
BdrvRequestFlags read_flags,
BdrvRequestFlags write_flags)
{
@@ -2313,10 +2313,10 @@ static void iscsi_xcopy_data(struct iscsi_data *data,
static int coroutine_fn iscsi_co_copy_range_to(BlockDriverState *bs,
BdrvChild *src,
- uint64_t src_offset,
+ int64_t src_offset,
BdrvChild *dst,
- uint64_t dst_offset,
- uint64_t bytes,
+ int64_t dst_offset,
+ int64_t bytes,
BdrvRequestFlags read_flags,
BdrvRequestFlags write_flags)
{
diff --git a/block/qcow2.c b/block/qcow2.c
index 5bab24d1dc..acf29277c9 100644
--- a/block/qcow2.c
+++ b/block/qcow2.c
@@ -3998,9 +3998,9 @@ static coroutine_fn int qcow2_co_pdiscard(BlockDriverState *bs,
static int coroutine_fn
qcow2_co_copy_range_from(BlockDriverState *bs,
- BdrvChild *src, uint64_t src_offset,
- BdrvChild *dst, uint64_t dst_offset,
- uint64_t bytes, BdrvRequestFlags read_flags,
+ BdrvChild *src, int64_t src_offset,
+ BdrvChild *dst, int64_t dst_offset,
+ int64_t bytes, BdrvRequestFlags read_flags,
BdrvRequestFlags write_flags)
{
BDRVQcow2State *s = bs->opaque;
@@ -4081,9 +4081,9 @@ out:
static int coroutine_fn
qcow2_co_copy_range_to(BlockDriverState *bs,
- BdrvChild *src, uint64_t src_offset,
- BdrvChild *dst, uint64_t dst_offset,
- uint64_t bytes, BdrvRequestFlags read_flags,
+ BdrvChild *src, int64_t src_offset,
+ BdrvChild *dst, int64_t dst_offset,
+ int64_t bytes, BdrvRequestFlags read_flags,
BdrvRequestFlags write_flags)
{
BDRVQcow2State *s = bs->opaque;
diff --git a/block/raw-format.c b/block/raw-format.c
index b0fe75f54a..051b00a4d4 100644
--- a/block/raw-format.c
+++ b/block/raw-format.c
@@ -532,16 +532,16 @@ static int raw_probe_geometry(BlockDriverState *bs, HDGeometry *geo)
static int coroutine_fn raw_co_copy_range_from(BlockDriverState *bs,
BdrvChild *src,
- uint64_t src_offset,
+ int64_t src_offset,
BdrvChild *dst,
- uint64_t dst_offset,
- uint64_t bytes,
+ int64_t dst_offset,
+ int64_t bytes,
BdrvRequestFlags read_flags,
BdrvRequestFlags write_flags)
{
int ret;
- ret = raw_adjust_offset(bs, (int64_t *)&src_offset, bytes, false);
+ ret = raw_adjust_offset(bs, &src_offset, bytes, false);
if (ret) {
return ret;
}
@@ -551,16 +551,16 @@ static int coroutine_fn raw_co_copy_range_from(BlockDriverState *bs,
static int coroutine_fn raw_co_copy_range_to(BlockDriverState *bs,
BdrvChild *src,
- uint64_t src_offset,
+ int64_t src_offset,
BdrvChild *dst,
- uint64_t dst_offset,
- uint64_t bytes,
+ int64_t dst_offset,
+ int64_t bytes,
BdrvRequestFlags read_flags,
BdrvRequestFlags write_flags)
{
int ret;
- ret = raw_adjust_offset(bs, (int64_t *)&dst_offset, bytes, true);
+ ret = raw_adjust_offset(bs, &dst_offset, bytes, true);
if (ret) {
return ret;
}
--
2.29.2
^ permalink raw reply related [flat|nested] 22+ messages in thread* [PATCH v5 06/11] block: make BlockLimits::max_pwrite_zeroes 64bit
2021-05-05 7:49 [PATCH v5 00/11] 64bit block-layer: part II Vladimir Sementsov-Ogievskiy
` (4 preceding siblings ...)
2021-05-05 7:49 ` [PATCH v5 05/11] block: use int64_t instead of uint64_t in copy_range driver handlers Vladimir Sementsov-Ogievskiy
@ 2021-05-05 7:49 ` Vladimir Sementsov-Ogievskiy
2021-05-05 7:49 ` [PATCH v5 07/11] block: use int64_t instead of int in driver write_zeroes handlers Vladimir Sementsov-Ogievskiy
` (6 subsequent siblings)
12 siblings, 0 replies; 22+ messages in thread
From: Vladimir Sementsov-Ogievskiy @ 2021-05-05 7:49 UTC (permalink / raw)
To: qemu-block
Cc: qemu-devel, eblake, stefanha, kwolf, mreitz, vsementsov, Fam Zheng
We are going to support 64 bit write-zeroes requests. Now update the
limit variable. It's absolutely safe. The variable is set in some
drivers, and used in bdrv_co_do_pwrite_zeroes().
Update also max_write_zeroes variable in bdrv_co_do_pwrite_zeroes(), so
that bdrv_co_do_pwrite_zeroes() is now prepared to 64bit requests. The
remaining logic including num, offset and bytes variables is already
supporting 64bit requests.
So the only thing that prevents 64 bit requests is limiting
max_write_zeroes variable to INT_MAX in bdrv_co_do_pwrite_zeroes().
We'll drop this limitation after updating all block drivers.
Ah, we also have bdrv_check_request32() in bdrv_co_pwritev_part(). It
will be modified to do bdrv_check_request() for write-zeroes path.
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
---
include/block/block_int.h | 9 +++++----
block/io.c | 2 +-
2 files changed, 6 insertions(+), 5 deletions(-)
diff --git a/include/block/block_int.h b/include/block/block_int.h
index b614db5cf9..1f93a38a23 100644
--- a/include/block/block_int.h
+++ b/include/block/block_int.h
@@ -676,10 +676,11 @@ typedef struct BlockLimits {
* that is set. May be 0 if bl.request_alignment is good enough */
uint32_t pdiscard_alignment;
- /* Maximum number of bytes that can zeroized at once (since it is
- * signed, it must be < 2G, if set). Must be multiple of
- * pwrite_zeroes_alignment. May be 0 if no inherent 32-bit limit */
- int32_t max_pwrite_zeroes;
+ /*
+ * Maximum number of bytes that can zeroized at once. Must be multiple of
+ * pwrite_zeroes_alignment. May be 0 if no inherent 64-bit limit.
+ */
+ int64_t max_pwrite_zeroes;
/* Optimal alignment for write zeroes requests in bytes. A power
* of 2 is best but not mandatory. Must be a multiple of
diff --git a/block/io.c b/block/io.c
index 448251beaa..0648561b15 100644
--- a/block/io.c
+++ b/block/io.c
@@ -1863,7 +1863,7 @@ static int coroutine_fn bdrv_co_do_pwrite_zeroes(BlockDriverState *bs,
int head = 0;
int tail = 0;
- int max_write_zeroes = MIN_NON_ZERO(bs->bl.max_pwrite_zeroes, INT_MAX);
+ int64_t 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_BOUNCE_BUFFER);
--
2.29.2
^ permalink raw reply related [flat|nested] 22+ messages in thread* [PATCH v5 07/11] block: use int64_t instead of int in driver write_zeroes handlers
2021-05-05 7:49 [PATCH v5 00/11] 64bit block-layer: part II Vladimir Sementsov-Ogievskiy
` (5 preceding siblings ...)
2021-05-05 7:49 ` [PATCH v5 06/11] block: make BlockLimits::max_pwrite_zeroes 64bit Vladimir Sementsov-Ogievskiy
@ 2021-05-05 7:49 ` Vladimir Sementsov-Ogievskiy
2021-06-04 20:09 ` Eric Blake
2021-05-05 7:49 ` [PATCH v5 08/11] block/io: allow 64bit write-zeroes requests Vladimir Sementsov-Ogievskiy
` (5 subsequent siblings)
12 siblings, 1 reply; 22+ messages in thread
From: Vladimir Sementsov-Ogievskiy @ 2021-05-05 7:49 UTC (permalink / raw)
To: qemu-block
Cc: qemu-devel, eblake, stefanha, kwolf, mreitz, vsementsov,
John Snow, Ari Sundholm, Pavel Dovgalyuk, Paolo Bonzini,
Ronnie Sahlberg, Peter Lieven, Fam Zheng, Alberto Garcia,
open list:GLUSTER
We are generally moving to int64_t for both offset and bytes parameters
on all io paths.
Main motivation is realization of 64-bit write_zeroes operation for
fast zeroing large disk chunks, up to the whole disk.
We chose signed type, to be consistent with off_t (which is signed) and
with possibility for signed return type (where negative value means
error).
So, convert driver write_zeroes handlers bytes parameter to int64_t.
The only caller of all updated function is bdrv_co_do_pwrite_zeroes().
bdrv_co_do_pwrite_zeroes() itself is of course OK with widening of
callee parameter type. Also, bdrv_co_do_pwrite_zeroes()'s
max_write_zeroes is limited to INT_MAX. So, updated functions all are
safe, the will not get "bytes" larger than before.
Still, let's look through all updated functions, and add assertions to
the ones which are actually unprepared to values larger than INT_MAX.
For these drivers also set explicit max_pwrite_zeroes limit.
Let's go:
backup-top: Calls backup_top_cbw() and bdrv_co_pwrite_zeroes, both
have 64bit argument.
blkdebug: calculations can't overflow, thanks to
bdrv_check_qiov_request() in generic layer. rule_check() and
bdrv_co_pwrite_zeroes() both have 64bit argument.
blklogwrites: pass to blk_log_writes_co_log() with 64bit argument.
blkreply, copy-on-read, filter-compress: pass to bdrv_co_pwrite_zeroes() which is OK
file-posix: both handler calls raw_do_pwrite_zeroes, which is updated.
In raw_do_pwrite_zeroes() calculations are OK due to
bdrv_check_qiov_request(), bytes go to RawPosixAIOData::aio_nbytes
which is uint64_t.
gluster: bytes go to GlusterAIOCB::size which is int64_t and to
glfs_zerofill_async works with off_t.
iscsi: Aha, here we deal with iscsi_writesame16_task() that has
uint32_t num_blocks argument and iscsi_writesame16_task() has
uint16_t argument. Make comments, add assertions and clarify
max_pwrite_zeroes calculation.
iscsi_allocmap_() functions already has int64_t argument
is_byte_request_lun_aligned is simple to update, do it.
mirror_top: pass to bdrv_mirror_top_do_write which has uint16_t
argument
nbd: Aha, here we have protocol limitation, and NBDRequest::len is
uint32_t. max_pwrite_zeroes is cleanly set to 32bit value, so we are
OK for now.
nvme: Again, protocol limitation. And no inherent limit for
write-zeroes at all. But from code that calculates cdw12 it's obvious
that we do have limit and alignment. Let's clarify it. Also,
obviously the code is not prepared to bytes=0. Let's handle this
case too.
trace events already 64bit
qcow2: offset + bytes and alignment still works good (thanks to
bdrv_check_qiov_request()), so tail calculation is OK
qcow2_subcluster_zeroize() has 64bit argument, should be OK
trace events updated
qed: qed_co_request wants int nb_sectors. Also in code we have size_t
used for request length which may be 32bit.. So, let's just keep
INT_MAX as a limit (aligning it down to pwrite_zeroes_alignment) and
don't care.
raw-format: Is OK. raw_adjust_offset and bdrv_co_pwrite_zeroes are both
64bit.
throttle: Both throttle_group_co_io_limits_intercept() and
bdrv_co_pwrite_zeroes() are 64bit.
vmdk: pass to vmdk_pwritev which is 64bit
quorum: pass to quorum_co_pwritev() which is 64bit
preallocated: pass to handle_write() and bdrv_co_pwrite_zeroes(), both
64bit.
Hooray!
At this point all block drivers are prepared to 64bit write-zero
requests or has explicitly set max_pwrite_zeroes.
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
---
include/block/block_int.h | 2 +-
block/backup-top.c | 2 +-
block/blkdebug.c | 2 +-
block/blklogwrites.c | 4 ++--
block/blkreplay.c | 2 +-
block/copy-on-read.c | 2 +-
block/file-posix.c | 6 +++---
block/filter-compress.c | 2 +-
block/gluster.c | 6 +++---
block/iscsi.c | 31 +++++++++++++++++++++----------
block/mirror.c | 2 +-
block/nbd.c | 6 ++++--
block/nvme.c | 24 +++++++++++++++++++++---
block/preallocate.c | 2 +-
block/qcow2.c | 2 +-
block/qed.c | 9 ++++++++-
block/quorum.c | 2 +-
block/raw-format.c | 2 +-
block/throttle.c | 2 +-
block/vmdk.c | 2 +-
block/trace-events | 4 ++--
21 files changed, 77 insertions(+), 39 deletions(-)
diff --git a/include/block/block_int.h b/include/block/block_int.h
index 1f93a38a23..5734f44e59 100644
--- a/include/block/block_int.h
+++ b/include/block/block_int.h
@@ -300,7 +300,7 @@ struct BlockDriver {
* will be called instead.
*/
int coroutine_fn (*bdrv_co_pwrite_zeroes)(BlockDriverState *bs,
- int64_t offset, int bytes, BdrvRequestFlags flags);
+ int64_t offset, int64_t bytes, BdrvRequestFlags flags);
int coroutine_fn (*bdrv_co_pdiscard)(BlockDriverState *bs,
int64_t offset, int bytes);
diff --git a/block/backup-top.c b/block/backup-top.c
index 6834921092..f193cc549c 100644
--- a/block/backup-top.c
+++ b/block/backup-top.c
@@ -75,7 +75,7 @@ static int coroutine_fn backup_top_co_pdiscard(BlockDriverState *bs,
}
static int coroutine_fn backup_top_co_pwrite_zeroes(BlockDriverState *bs,
- int64_t offset, int bytes, BdrvRequestFlags flags)
+ int64_t offset, int64_t bytes, BdrvRequestFlags flags)
{
int ret = backup_top_cbw(bs, offset, bytes, flags);
if (ret < 0) {
diff --git a/block/blkdebug.c b/block/blkdebug.c
index a7fedd80fd..c81cb9cb1a 100644
--- a/block/blkdebug.c
+++ b/block/blkdebug.c
@@ -667,7 +667,7 @@ static int blkdebug_co_flush(BlockDriverState *bs)
}
static int coroutine_fn blkdebug_co_pwrite_zeroes(BlockDriverState *bs,
- int64_t offset, int bytes,
+ int64_t offset, int64_t bytes,
BdrvRequestFlags flags)
{
uint32_t align = MAX(bs->bl.request_alignment,
diff --git a/block/blklogwrites.c b/block/blklogwrites.c
index ca174ab135..d7ae64c22d 100644
--- a/block/blklogwrites.c
+++ b/block/blklogwrites.c
@@ -468,8 +468,8 @@ blk_log_writes_co_pwritev(BlockDriverState *bs, int64_t offset, int64_t bytes,
}
static int coroutine_fn
-blk_log_writes_co_pwrite_zeroes(BlockDriverState *bs, int64_t offset, int bytes,
- BdrvRequestFlags flags)
+blk_log_writes_co_pwrite_zeroes(BlockDriverState *bs, int64_t offset,
+ int64_t bytes, BdrvRequestFlags flags)
{
return blk_log_writes_co_log(bs, offset, bytes, NULL, flags,
blk_log_writes_co_do_file_pwrite_zeroes, 0,
diff --git a/block/blkreplay.c b/block/blkreplay.c
index 7ba62dcac1..89d74a3cca 100644
--- a/block/blkreplay.c
+++ b/block/blkreplay.c
@@ -94,7 +94,7 @@ static int coroutine_fn blkreplay_co_pwritev(BlockDriverState *bs,
}
static int coroutine_fn blkreplay_co_pwrite_zeroes(BlockDriverState *bs,
- int64_t offset, int bytes, BdrvRequestFlags flags)
+ int64_t offset, int64_t bytes, BdrvRequestFlags flags)
{
uint64_t reqid = blkreplay_next_id();
int ret = bdrv_co_pwrite_zeroes(bs->file, offset, bytes, flags);
diff --git a/block/copy-on-read.c b/block/copy-on-read.c
index 7675565080..758a5d44d5 100644
--- a/block/copy-on-read.c
+++ b/block/copy-on-read.c
@@ -206,7 +206,7 @@ static int coroutine_fn cor_co_pwritev_part(BlockDriverState *bs,
static int coroutine_fn cor_co_pwrite_zeroes(BlockDriverState *bs,
- int64_t offset, int bytes,
+ int64_t offset, int64_t bytes,
BdrvRequestFlags flags)
{
return bdrv_co_pwrite_zeroes(bs->file, offset, bytes, flags);
diff --git a/block/file-posix.c b/block/file-posix.c
index df1b3c98c8..6114bdd308 100644
--- a/block/file-posix.c
+++ b/block/file-posix.c
@@ -2905,7 +2905,7 @@ raw_co_pdiscard(BlockDriverState *bs, int64_t offset, int bytes)
}
static int coroutine_fn
-raw_do_pwrite_zeroes(BlockDriverState *bs, int64_t offset, int bytes,
+raw_do_pwrite_zeroes(BlockDriverState *bs, int64_t offset, int64_t bytes,
BdrvRequestFlags flags, bool blkdev)
{
BDRVRawState *s = bs->opaque;
@@ -2973,7 +2973,7 @@ raw_do_pwrite_zeroes(BlockDriverState *bs, int64_t offset, int bytes,
static int coroutine_fn raw_co_pwrite_zeroes(
BlockDriverState *bs, int64_t offset,
- int bytes, BdrvRequestFlags flags)
+ int64_t bytes, BdrvRequestFlags flags)
{
return raw_do_pwrite_zeroes(bs, offset, bytes, flags, false);
}
@@ -3544,7 +3544,7 @@ hdev_co_pdiscard(BlockDriverState *bs, int64_t offset, int bytes)
}
static coroutine_fn int hdev_co_pwrite_zeroes(BlockDriverState *bs,
- int64_t offset, int bytes, BdrvRequestFlags flags)
+ int64_t offset, int64_t bytes, BdrvRequestFlags flags)
{
int rc;
diff --git a/block/filter-compress.c b/block/filter-compress.c
index 505822a44f..fb85686b69 100644
--- a/block/filter-compress.c
+++ b/block/filter-compress.c
@@ -86,7 +86,7 @@ static int coroutine_fn compress_co_pwritev_part(BlockDriverState *bs,
static int coroutine_fn compress_co_pwrite_zeroes(BlockDriverState *bs,
- int64_t offset, int bytes,
+ int64_t offset, int64_t bytes,
BdrvRequestFlags flags)
{
return bdrv_co_pwrite_zeroes(bs->file, offset, bytes, flags);
diff --git a/block/gluster.c b/block/gluster.c
index e8ee14c8e9..6a17b37c0c 100644
--- a/block/gluster.c
+++ b/block/gluster.c
@@ -1003,19 +1003,19 @@ static void qemu_gluster_reopen_abort(BDRVReopenState *state)
#ifdef CONFIG_GLUSTERFS_ZEROFILL
static coroutine_fn int qemu_gluster_co_pwrite_zeroes(BlockDriverState *bs,
int64_t offset,
- int size,
+ int64_t bytes,
BdrvRequestFlags flags)
{
int ret;
GlusterAIOCB acb;
BDRVGlusterState *s = bs->opaque;
- acb.size = size;
+ acb.size = bytes;
acb.ret = 0;
acb.coroutine = qemu_coroutine_self();
acb.aio_context = bdrv_get_aio_context(bs);
- ret = glfs_zerofill_async(s->fd, offset, size, gluster_finish_aiocb, &acb);
+ ret = glfs_zerofill_async(s->fd, offset, bytes, gluster_finish_aiocb, &acb);
if (ret < 0) {
return -errno;
}
diff --git a/block/iscsi.c b/block/iscsi.c
index 6bcde6ec6b..b90ed67377 100644
--- a/block/iscsi.c
+++ b/block/iscsi.c
@@ -427,14 +427,14 @@ static int64_t sector_qemu2lun(int64_t sector, IscsiLun *iscsilun)
return sector * BDRV_SECTOR_SIZE / iscsilun->block_size;
}
-static bool is_byte_request_lun_aligned(int64_t offset, int count,
+static bool is_byte_request_lun_aligned(int64_t offset, int64_t bytes,
IscsiLun *iscsilun)
{
- if (offset % iscsilun->block_size || count % iscsilun->block_size) {
+ if (offset % iscsilun->block_size || bytes % iscsilun->block_size) {
error_report("iSCSI misaligned request: "
"iscsilun->block_size %u, offset %" PRIi64
- ", count %d",
- iscsilun->block_size, offset, count);
+ ", bytes %" PRIi64,
+ iscsilun->block_size, offset, bytes);
return false;
}
return true;
@@ -1205,15 +1205,16 @@ out_unlock:
static int
coroutine_fn iscsi_co_pwrite_zeroes(BlockDriverState *bs, int64_t offset,
- int bytes, BdrvRequestFlags flags)
+ int64_t bytes, BdrvRequestFlags flags)
{
IscsiLun *iscsilun = bs->opaque;
struct IscsiTask iTask;
uint64_t lba;
- uint32_t nb_blocks;
+ uint64_t nb_blocks;
bool use_16_for_ws = iscsilun->use_16_for_rw;
int r = 0;
+
if (!is_byte_request_lun_aligned(offset, bytes, iscsilun)) {
return -ENOTSUP;
}
@@ -1250,11 +1251,21 @@ coroutine_fn iscsi_co_pwrite_zeroes(BlockDriverState *bs, int64_t offset,
iscsi_co_init_iscsitask(iscsilun, &iTask);
retry:
if (use_16_for_ws) {
+ /*
+ * iscsi_writesame16_task num_blocks argument is uint32_t. We rely here
+ * on our max_pwrite_zeroes limit.
+ */
+ assert(nb_blocks < UINT32_MAX);
iTask.task = iscsi_writesame16_task(iscsilun->iscsi, iscsilun->lun, lba,
iscsilun->zeroblock, iscsilun->block_size,
nb_blocks, 0, !!(flags & BDRV_REQ_MAY_UNMAP),
0, 0, iscsi_co_generic_cb, &iTask);
} else {
+ /*
+ * iscsi_writesame10_task num_blocks argument is uint16_t. We rely here
+ * on our max_pwrite_zeroes limit.
+ */
+ assert(nb_blocks < UINT16_MAX);
iTask.task = iscsi_writesame10_task(iscsilun->iscsi, iscsilun->lun, lba,
iscsilun->zeroblock, iscsilun->block_size,
nb_blocks, 0, !!(flags & BDRV_REQ_MAY_UNMAP),
@@ -2074,10 +2085,10 @@ static void iscsi_refresh_limits(BlockDriverState *bs, Error **errp)
bs->bl.pdiscard_alignment = iscsilun->block_size;
}
- if (iscsilun->bl.max_ws_len < 0xffffffff / block_size) {
- bs->bl.max_pwrite_zeroes =
- iscsilun->bl.max_ws_len * iscsilun->block_size;
- }
+ bs->bl.max_pwrite_zeroes =
+ MIN_NON_ZERO(iscsilun->bl.max_ws_len * iscsilun->block_size,
+ max_xfer_len * iscsilun->block_size);
+
if (iscsilun->lbp.lbpws) {
bs->bl.pwrite_zeroes_alignment =
iscsilun->bl.opt_unmap_gran * iscsilun->block_size;
diff --git a/block/mirror.c b/block/mirror.c
index fdf477a0fd..f0a3eac216 100644
--- a/block/mirror.c
+++ b/block/mirror.c
@@ -1479,7 +1479,7 @@ static int coroutine_fn bdrv_mirror_top_flush(BlockDriverState *bs)
}
static int coroutine_fn bdrv_mirror_top_pwrite_zeroes(BlockDriverState *bs,
- int64_t offset, int bytes, BdrvRequestFlags flags)
+ int64_t offset, int64_t bytes, BdrvRequestFlags flags)
{
return bdrv_mirror_top_do_write(bs, MIRROR_METHOD_ZERO, offset, bytes, NULL,
flags);
diff --git a/block/nbd.c b/block/nbd.c
index d3de441c2b..bf56735e4a 100644
--- a/block/nbd.c
+++ b/block/nbd.c
@@ -1630,15 +1630,17 @@ static int nbd_client_co_pwritev(BlockDriverState *bs, int64_t offset,
}
static int nbd_client_co_pwrite_zeroes(BlockDriverState *bs, int64_t offset,
- int bytes, BdrvRequestFlags flags)
+ int64_t bytes, BdrvRequestFlags flags)
{
BDRVNBDState *s = (BDRVNBDState *)bs->opaque;
NBDRequest request = {
.type = NBD_CMD_WRITE_ZEROES,
.from = offset,
- .len = bytes,
+ .len = bytes, /* .len is uint32_t actually */
};
+ assert(bytes < UINT32_MAX); /* relay on max_pwrite_zeroes */
+
assert(!(s->info.flags & NBD_FLAG_READ_ONLY));
if (!(s->info.flags & NBD_FLAG_SEND_WRITE_ZEROES)) {
return -ENOTSUP;
diff --git a/block/nvme.c b/block/nvme.c
index 349c152ab5..51fc65fc91 100644
--- a/block/nvme.c
+++ b/block/nvme.c
@@ -1266,19 +1266,29 @@ static coroutine_fn int nvme_co_flush(BlockDriverState *bs)
static coroutine_fn int nvme_co_pwrite_zeroes(BlockDriverState *bs,
int64_t offset,
- int bytes,
+ int64_t bytes,
BdrvRequestFlags flags)
{
BDRVNVMeState *s = bs->opaque;
NVMeQueuePair *ioq = s->queues[INDEX_IO(0)];
NVMeRequest *req;
-
- uint32_t cdw12 = ((bytes >> s->blkshift) - 1) & 0xFFFF;
+ uint32_t cdw12;
if (!s->supports_write_zeroes) {
return -ENOTSUP;
}
+ if (bytes == 0) {
+ return 0;
+ }
+
+ cdw12 = ((bytes >> s->blkshift) - 1) & 0xFFFF;
+ /*
+ * We should not loose information. pwrite_zeroes_alignment and
+ * max_pwrite_zeroes guarantees it.
+ */
+ assert(((cdw12 + 1) << s->blkshift) == bytes);
+
NvmeCmd cmd = {
.opcode = NVME_CMD_WRITE_ZEROES,
.nsid = cpu_to_le32(s->nsid),
@@ -1442,6 +1452,14 @@ static void nvme_refresh_limits(BlockDriverState *bs, Error **errp)
bs->bl.opt_mem_alignment = s->page_size;
bs->bl.request_alignment = s->page_size;
bs->bl.max_transfer = s->max_transfer;
+
+ /*
+ * Look at nvme_co_pwrite_zeroes: after shift and decrement we should get
+ * at most 0xFFFF
+ */
+ bs->bl.max_pwrite_zeroes = 1ULL << (s->blkshift + 16);
+ bs->bl.pwrite_zeroes_alignment = MAX(bs->bl.request_alignment,
+ 1UL << s->blkshift);
}
static void nvme_detach_aio_context(BlockDriverState *bs)
diff --git a/block/preallocate.c b/block/preallocate.c
index c19885af17..99e28d9f08 100644
--- a/block/preallocate.c
+++ b/block/preallocate.c
@@ -337,7 +337,7 @@ static bool coroutine_fn handle_write(BlockDriverState *bs, int64_t offset,
}
static int coroutine_fn preallocate_co_pwrite_zeroes(BlockDriverState *bs,
- int64_t offset, int bytes, BdrvRequestFlags flags)
+ int64_t offset, int64_t bytes, BdrvRequestFlags flags)
{
bool want_merge_zero =
!(flags & ~(BDRV_REQ_ZERO_WRITE | BDRV_REQ_NO_FALLBACK));
diff --git a/block/qcow2.c b/block/qcow2.c
index acf29277c9..59c5137410 100644
--- a/block/qcow2.c
+++ b/block/qcow2.c
@@ -3913,7 +3913,7 @@ static bool is_zero(BlockDriverState *bs, int64_t offset, int64_t bytes)
}
static coroutine_fn int qcow2_co_pwrite_zeroes(BlockDriverState *bs,
- int64_t offset, int bytes, BdrvRequestFlags flags)
+ int64_t offset, int64_t bytes, BdrvRequestFlags flags)
{
int ret;
BDRVQcow2State *s = bs->opaque;
diff --git a/block/qed.c b/block/qed.c
index f45c640513..09773c584b 100644
--- a/block/qed.c
+++ b/block/qed.c
@@ -582,6 +582,7 @@ static void bdrv_qed_refresh_limits(BlockDriverState *bs, Error **errp)
BDRVQEDState *s = bs->opaque;
bs->bl.pwrite_zeroes_alignment = s->header.cluster_size;
+ bs->bl.max_pwrite_zeroes = QEMU_ALIGN_DOWN(INT_MAX, s->header.cluster_size);
}
/* We have nothing to do for QED reopen, stubs just return
@@ -1397,7 +1398,7 @@ static int coroutine_fn bdrv_qed_co_writev(BlockDriverState *bs,
static int coroutine_fn bdrv_qed_co_pwrite_zeroes(BlockDriverState *bs,
int64_t offset,
- int bytes,
+ int64_t bytes,
BdrvRequestFlags flags)
{
BDRVQEDState *s = bs->opaque;
@@ -1408,6 +1409,12 @@ static int coroutine_fn bdrv_qed_co_pwrite_zeroes(BlockDriverState *bs,
*/
QEMUIOVector qiov = QEMU_IOVEC_INIT_BUF(qiov, NULL, bytes);
+ /*
+ * QED is not prepared for 62bit write-zero requests, so rely on
+ * max_pwrite_zeroes.
+ */
+ assert(bytes <= INT_MAX);
+
/* Fall back if the request is not aligned */
if (qed_offset_into_cluster(s, offset) ||
qed_offset_into_cluster(s, bytes)) {
diff --git a/block/quorum.c b/block/quorum.c
index 353401ac08..772de80a77 100644
--- a/block/quorum.c
+++ b/block/quorum.c
@@ -746,7 +746,7 @@ static int quorum_co_pwritev(BlockDriverState *bs, int64_t offset,
}
static int quorum_co_pwrite_zeroes(BlockDriverState *bs, int64_t offset,
- int bytes, BdrvRequestFlags flags)
+ int64_t bytes, BdrvRequestFlags flags)
{
return quorum_co_pwritev(bs, offset, bytes, NULL,
diff --git a/block/raw-format.c b/block/raw-format.c
index 051b00a4d4..4e9304c63b 100644
--- a/block/raw-format.c
+++ b/block/raw-format.c
@@ -289,7 +289,7 @@ static int coroutine_fn raw_co_block_status(BlockDriverState *bs,
}
static int coroutine_fn raw_co_pwrite_zeroes(BlockDriverState *bs,
- int64_t offset, int bytes,
+ int64_t offset, int64_t bytes,
BdrvRequestFlags flags)
{
int ret;
diff --git a/block/throttle.c b/block/throttle.c
index 1330e844c3..c13fe9067f 100644
--- a/block/throttle.c
+++ b/block/throttle.c
@@ -135,7 +135,7 @@ static int coroutine_fn throttle_co_pwritev(BlockDriverState *bs,
}
static int coroutine_fn throttle_co_pwrite_zeroes(BlockDriverState *bs,
- int64_t offset, int bytes,
+ int64_t offset, int64_t bytes,
BdrvRequestFlags flags)
{
ThrottleGroupMember *tgm = bs->opaque;
diff --git a/block/vmdk.c b/block/vmdk.c
index 8d49e54bdd..fb4cc9da90 100644
--- a/block/vmdk.c
+++ b/block/vmdk.c
@@ -2109,7 +2109,7 @@ vmdk_co_pwritev_compressed(BlockDriverState *bs, int64_t offset, int64_t bytes,
static int coroutine_fn vmdk_co_pwrite_zeroes(BlockDriverState *bs,
int64_t offset,
- int bytes,
+ int64_t bytes,
BdrvRequestFlags flags)
{
int ret;
diff --git a/block/trace-events b/block/trace-events
index 3cbea9e2e2..3edd2899c2 100644
--- a/block/trace-events
+++ b/block/trace-events
@@ -80,8 +80,8 @@ qcow2_writev_done_req(void *co, int ret) "co %p ret %d"
qcow2_writev_start_part(void *co) "co %p"
qcow2_writev_done_part(void *co, int cur_bytes) "co %p cur_bytes %d"
qcow2_writev_data(void *co, uint64_t offset) "co %p offset 0x%" PRIx64
-qcow2_pwrite_zeroes_start_req(void *co, int64_t offset, int count) "co %p offset 0x%" PRIx64 " count %d"
-qcow2_pwrite_zeroes(void *co, int64_t offset, int count) "co %p offset 0x%" PRIx64 " count %d"
+qcow2_pwrite_zeroes_start_req(void *co, int64_t offset, int64_t bytes) "co %p offset 0x%" PRIx64 " bytes %" PRId64
+qcow2_pwrite_zeroes(void *co, int64_t offset, int64_t bytes) "co %p offset 0x%" PRIx64 " bytes %" PRId64
qcow2_skip_cow(void *co, uint64_t offset, int nb_clusters) "co %p offset 0x%" PRIx64 " nb_clusters %d"
# qcow2-cluster.c
--
2.29.2
^ permalink raw reply related [flat|nested] 22+ messages in thread* Re: [PATCH v5 07/11] block: use int64_t instead of int in driver write_zeroes handlers
2021-05-05 7:49 ` [PATCH v5 07/11] block: use int64_t instead of int in driver write_zeroes handlers Vladimir Sementsov-Ogievskiy
@ 2021-06-04 20:09 ` Eric Blake
2021-06-05 13:50 ` Vladimir Sementsov-Ogievskiy
0 siblings, 1 reply; 22+ messages in thread
From: Eric Blake @ 2021-06-04 20:09 UTC (permalink / raw)
To: Vladimir Sementsov-Ogievskiy
Cc: kwolf, Fam Zheng, open list:GLUSTER, Alberto Garcia,
Pavel Dovgalyuk, qemu-block, Ronnie Sahlberg, Peter Lieven,
qemu-devel, mreitz, stefanha, Paolo Bonzini, John Snow,
Ari Sundholm
On Wed, May 05, 2021 at 10:49:57AM +0300, Vladimir Sementsov-Ogievskiy wrote:
> We are generally moving to int64_t for both offset and bytes parameters
> on all io paths.
>
> Main motivation is realization of 64-bit write_zeroes operation for
> fast zeroing large disk chunks, up to the whole disk.
>
> We chose signed type, to be consistent with off_t (which is signed) and
> with possibility for signed return type (where negative value means
> error).
>
> So, convert driver write_zeroes handlers bytes parameter to int64_t.
>
> The only caller of all updated function is bdrv_co_do_pwrite_zeroes().
>
> bdrv_co_do_pwrite_zeroes() itself is of course OK with widening of
> callee parameter type. Also, bdrv_co_do_pwrite_zeroes()'s
> max_write_zeroes is limited to INT_MAX. So, updated functions all are
> safe, the will not get "bytes" larger than before.
they
>
> Still, let's look through all updated functions, and add assertions to
> the ones which are actually unprepared to values larger than INT_MAX.
> For these drivers also set explicit max_pwrite_zeroes limit.
>
> Let's go:
>
> backup-top: Calls backup_top_cbw() and bdrv_co_pwrite_zeroes, both
> have 64bit argument.
backup_top_cbw has uint64_t argument (at least on current qemu.git; I
didn't spot if it was changed in the meantime earlier in this series
or if I'm missing review of a prerequisite), but we're safe since the
block layer does not pass in negative values.
>
> blkdebug: calculations can't overflow, thanks to
> bdrv_check_qiov_request() in generic layer. rule_check() and
> bdrv_co_pwrite_zeroes() both have 64bit argument.
rule_check() is another function currently using uint64_t.
>
> blklogwrites: pass to blk_log_writes_co_log() with 64bit argument.
That, and struct BlkLogWritesFileReq, still use uint64_t.
>
> blkreply, copy-on-read, filter-compress: pass to bdrv_co_pwrite_zeroes() which is OK
blkreplay
>
> file-posix: both handler calls raw_do_pwrite_zeroes, which is updated.
> In raw_do_pwrite_zeroes() calculations are OK due to
> bdrv_check_qiov_request(), bytes go to RawPosixAIOData::aio_nbytes
> which is uint64_t.
We also have to check where that uint64_t gets handed;
handle_aiocb_write_zeroes_block() passes a uint64_t[2] to
ioctl(BLKZEROOUT), handle_aiocb_write_zeroes() calls do_fallocate()
which takes off_t (and we compile to always have 64-bit off_t), as
does handle_aiocb_write_zeroes_unmap. All look safe.
>
> gluster: bytes go to GlusterAIOCB::size which is int64_t and to
> glfs_zerofill_async works with off_t.
>
> iscsi: Aha, here we deal with iscsi_writesame16_task() that has
> uint32_t num_blocks argument and iscsi_writesame16_task() has
s/16/10/
> uint16_t argument. Make comments, add assertions and clarify
> max_pwrite_zeroes calculation.
> iscsi_allocmap_() functions already has int64_t argument
> is_byte_request_lun_aligned is simple to update, do it.
>
> mirror_top: pass to bdrv_mirror_top_do_write which has uint16_t
s/16/64/
> argument
>
> nbd: Aha, here we have protocol limitation, and NBDRequest::len is
> uint32_t. max_pwrite_zeroes is cleanly set to 32bit value, so we are
> OK for now.
>
> nvme: Again, protocol limitation. And no inherent limit for
> write-zeroes at all. But from code that calculates cdw12 it's obvious
> that we do have limit and alignment. Let's clarify it. Also,
> obviously the code is not prepared to bytes=0. Let's handle this
to handle bytes=0
> case too.
> trace events already 64bit
>
> qcow2: offset + bytes and alignment still works good (thanks to
> bdrv_check_qiov_request()), so tail calculation is OK
> qcow2_subcluster_zeroize() has 64bit argument, should be OK
> trace events updated
>
> qed: qed_co_request wants int nb_sectors. Also in code we have size_t
> used for request length which may be 32bit.. So, let's just keep
Double dot looks odd.
> INT_MAX as a limit (aligning it down to pwrite_zeroes_alignment) and
> don't care.
Yeah, even when size_t is 64-bit, qed is not our high priority so
sticking to 32-bit limit encourages people to switch away from qed ;)
>
> raw-format: Is OK. raw_adjust_offset and bdrv_co_pwrite_zeroes are both
> 64bit.
I probably already mentioned it in earlier reviews, but hopefully by
the end of the series, we clean up raw_adjust_offset() to take
int64_t* instead of uint64_t* to get rid of ugly casts. Doesn't have
to be done in this patch.
>
> throttle: Both throttle_group_co_io_limits_intercept() and
> bdrv_co_pwrite_zeroes() are 64bit.
>
> vmdk: pass to vmdk_pwritev which is 64bit
>
> quorum: pass to quorum_co_pwritev() which is 64bit
>
> preallocated: pass to handle_write() and bdrv_co_pwrite_zeroes(), both
File is named preallocate.c, the 'd' seems odd. Worth sorting this
before qcow2 in the commit message?
> 64bit.
>
> Hooray!
>
> At this point all block drivers are prepared to 64bit write-zero
> requests or has explicitly set max_pwrite_zeroes.
are prepared to support 64bit write-zero requests, or have explicitly set
>
> Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
> ---
> +++ b/block/iscsi.c
> @@ -1205,15 +1205,16 @@ out_unlock:
>
> static int
> coroutine_fn iscsi_co_pwrite_zeroes(BlockDriverState *bs, int64_t offset,
> - int bytes, BdrvRequestFlags flags)
> + int64_t bytes, BdrvRequestFlags flags)
> {
> IscsiLun *iscsilun = bs->opaque;
> struct IscsiTask iTask;
> uint64_t lba;
> - uint32_t nb_blocks;
> + uint64_t nb_blocks;
> bool use_16_for_ws = iscsilun->use_16_for_rw;
> int r = 0;
>
> +
> if (!is_byte_request_lun_aligned(offset, bytes, iscsilun)) {
Why the added blank line here?
> return -ENOTSUP;
> }
> @@ -1250,11 +1251,21 @@ coroutine_fn iscsi_co_pwrite_zeroes(BlockDriverState *bs, int64_t offset,
> iscsi_co_init_iscsitask(iscsilun, &iTask);
> retry:
> if (use_16_for_ws) {
> + /*
> + * iscsi_writesame16_task num_blocks argument is uint32_t. We rely here
> + * on our max_pwrite_zeroes limit.
> + */
> + assert(nb_blocks < UINT32_MAX);
> iTask.task = iscsi_writesame16_task(iscsilun->iscsi, iscsilun->lun, lba,
> iscsilun->zeroblock, iscsilun->block_size,
> nb_blocks, 0, !!(flags & BDRV_REQ_MAY_UNMAP),
> 0, 0, iscsi_co_generic_cb, &iTask);
> } else {
> + /*
> + * iscsi_writesame10_task num_blocks argument is uint16_t. We rely here
> + * on our max_pwrite_zeroes limit.
> + */
> + assert(nb_blocks < UINT16_MAX);
> iTask.task = iscsi_writesame10_task(iscsilun->iscsi, iscsilun->lun, lba,
> iscsilun->zeroblock, iscsilun->block_size,
> nb_blocks, 0, !!(flags & BDRV_REQ_MAY_UNMAP),
Thanks - these assertions and comments are indeed a lifesaver for
future maintenance.
> @@ -2074,10 +2085,10 @@ static void iscsi_refresh_limits(BlockDriverState *bs, Error **errp)
> bs->bl.pdiscard_alignment = iscsilun->block_size;
> }
>
> - if (iscsilun->bl.max_ws_len < 0xffffffff / block_size) {
> - bs->bl.max_pwrite_zeroes =
> - iscsilun->bl.max_ws_len * iscsilun->block_size;
> - }
> + bs->bl.max_pwrite_zeroes =
> + MIN_NON_ZERO(iscsilun->bl.max_ws_len * iscsilun->block_size,
> + max_xfer_len * iscsilun->block_size);
Works because max_xfer_len is 0xffff if we are stuck using
writesame10, or 0xffffffff if we are able to use writesame16.
> +++ b/block/nvme.c
> @@ -1266,19 +1266,29 @@ static coroutine_fn int nvme_co_flush(BlockDriverState *bs)
>
> static coroutine_fn int nvme_co_pwrite_zeroes(BlockDriverState *bs,
> int64_t offset,
> - int bytes,
> + int64_t bytes,
> BdrvRequestFlags flags)
> {
> BDRVNVMeState *s = bs->opaque;
> NVMeQueuePair *ioq = s->queues[INDEX_IO(0)];
> NVMeRequest *req;
> -
> - uint32_t cdw12 = ((bytes >> s->blkshift) - 1) & 0xFFFF;
> + uint32_t cdw12;
>
> if (!s->supports_write_zeroes) {
> return -ENOTSUP;
> }
>
> + if (bytes == 0) {
> + return 0;
> + }
> +
> + cdw12 = ((bytes >> s->blkshift) - 1) & 0xFFFF;
> + /*
> + * We should not loose information. pwrite_zeroes_alignment and
lose (this is a common English typo; "lose" rhymes with "use" and is
opposite of "gain", while "loose" rhymes with "goose" and is opposite
of "tighten")
> +++ b/block/qed.c
> @@ -1408,6 +1409,12 @@ static int coroutine_fn bdrv_qed_co_pwrite_zeroes(BlockDriverState *bs,
> */
> QEMUIOVector qiov = QEMU_IOVEC_INIT_BUF(qiov, NULL, bytes);
>
> + /*
> + * QED is not prepared for 62bit write-zero requests, so rely on
64bit
> + * max_pwrite_zeroes.
> + */
> + assert(bytes <= INT_MAX);
> +
> /* Fall back if the request is not aligned */
> if (qed_offset_into_cluster(s, offset) ||
> qed_offset_into_cluster(s, bytes)) {
Reviewed-by: Eric Blake <eblake@redhat.com>
--
Eric Blake, Principal Software Engineer
Red Hat, Inc. +1-919-301-3266
Virtualization: qemu.org | libvirt.org
^ permalink raw reply [flat|nested] 22+ messages in thread* Re: [PATCH v5 07/11] block: use int64_t instead of int in driver write_zeroes handlers
2021-06-04 20:09 ` Eric Blake
@ 2021-06-05 13:50 ` Vladimir Sementsov-Ogievskiy
0 siblings, 0 replies; 22+ messages in thread
From: Vladimir Sementsov-Ogievskiy @ 2021-06-05 13:50 UTC (permalink / raw)
To: Eric Blake
Cc: qemu-block, qemu-devel, stefanha, kwolf, mreitz, John Snow,
Ari Sundholm, Pavel Dovgalyuk, Paolo Bonzini, Ronnie Sahlberg,
Peter Lieven, Fam Zheng, Alberto Garcia, open list:GLUSTER
04.06.2021 23:09, Eric Blake wrote:
> On Wed, May 05, 2021 at 10:49:57AM +0300, Vladimir Sementsov-Ogievskiy wrote:
>> We are generally moving to int64_t for both offset and bytes parameters
>> on all io paths.
>>
>> Main motivation is realization of 64-bit write_zeroes operation for
>> fast zeroing large disk chunks, up to the whole disk.
>>
>> We chose signed type, to be consistent with off_t (which is signed) and
>> with possibility for signed return type (where negative value means
>> error).
>>
>> So, convert driver write_zeroes handlers bytes parameter to int64_t.
>>
>> The only caller of all updated function is bdrv_co_do_pwrite_zeroes().
>>
>> bdrv_co_do_pwrite_zeroes() itself is of course OK with widening of
>> callee parameter type. Also, bdrv_co_do_pwrite_zeroes()'s
>> max_write_zeroes is limited to INT_MAX. So, updated functions all are
>> safe, the will not get "bytes" larger than before.
>
> they
>
>>
>> Still, let's look through all updated functions, and add assertions to
>> the ones which are actually unprepared to values larger than INT_MAX.
>> For these drivers also set explicit max_pwrite_zeroes limit.
>>
>> Let's go:
>>
>> backup-top: Calls backup_top_cbw() and bdrv_co_pwrite_zeroes, both
>> have 64bit argument.
>
> backup_top_cbw has uint64_t argument (at least on current qemu.git; I
> didn't spot if it was changed in the meantime earlier in this series
> or if I'm missing review of a prerequisite), but we're safe since the
> block layer does not pass in negative values.
>
>>
>> blkdebug: calculations can't overflow, thanks to
>> bdrv_check_qiov_request() in generic layer. rule_check() and
>> bdrv_co_pwrite_zeroes() both have 64bit argument.
>
> rule_check() is another function currently using uint64_t.
>
>>
>> blklogwrites: pass to blk_log_writes_co_log() with 64bit argument.
>
> That, and struct BlkLogWritesFileReq, still use uint64_t.
>
>>
>> blkreply, copy-on-read, filter-compress: pass to bdrv_co_pwrite_zeroes() which is OK
>
> blkreplay
>
>>
>> file-posix: both handler calls raw_do_pwrite_zeroes, which is updated.
>> In raw_do_pwrite_zeroes() calculations are OK due to
>> bdrv_check_qiov_request(), bytes go to RawPosixAIOData::aio_nbytes
>> which is uint64_t.
>
> We also have to check where that uint64_t gets handed;
> handle_aiocb_write_zeroes_block() passes a uint64_t[2] to
> ioctl(BLKZEROOUT), handle_aiocb_write_zeroes() calls do_fallocate()
> which takes off_t (and we compile to always have 64-bit off_t), as
> does handle_aiocb_write_zeroes_unmap. All look safe.
>
>>
>> gluster: bytes go to GlusterAIOCB::size which is int64_t and to
>> glfs_zerofill_async works with off_t.
>>
>> iscsi: Aha, here we deal with iscsi_writesame16_task() that has
>> uint32_t num_blocks argument and iscsi_writesame16_task() has
>
> s/16/10/
>
>> uint16_t argument. Make comments, add assertions and clarify
>> max_pwrite_zeroes calculation.
>> iscsi_allocmap_() functions already has int64_t argument
>> is_byte_request_lun_aligned is simple to update, do it.
>>
>> mirror_top: pass to bdrv_mirror_top_do_write which has uint16_t
>
> s/16/64/
>
>> argument
>>
>> nbd: Aha, here we have protocol limitation, and NBDRequest::len is
>> uint32_t. max_pwrite_zeroes is cleanly set to 32bit value, so we are
>> OK for now.
>>
>> nvme: Again, protocol limitation. And no inherent limit for
>> write-zeroes at all. But from code that calculates cdw12 it's obvious
>> that we do have limit and alignment. Let's clarify it. Also,
>> obviously the code is not prepared to bytes=0. Let's handle this
>
> to handle bytes=0
>
>> case too.
>> trace events already 64bit
>>
>> qcow2: offset + bytes and alignment still works good (thanks to
>> bdrv_check_qiov_request()), so tail calculation is OK
>> qcow2_subcluster_zeroize() has 64bit argument, should be OK
>> trace events updated
>>
>> qed: qed_co_request wants int nb_sectors. Also in code we have size_t
>> used for request length which may be 32bit.. So, let's just keep
>
> Double dot looks odd.
>
>> INT_MAX as a limit (aligning it down to pwrite_zeroes_alignment) and
>> don't care.
>
> Yeah, even when size_t is 64-bit, qed is not our high priority so
> sticking to 32-bit limit encourages people to switch away from qed ;)
>
>>
>> raw-format: Is OK. raw_adjust_offset and bdrv_co_pwrite_zeroes are both
>> 64bit.
>
> I probably already mentioned it in earlier reviews, but hopefully by
> the end of the series, we clean up raw_adjust_offset() to take
> int64_t* instead of uint64_t* to get rid of ugly casts. Doesn't have
> to be done in this patch.
>
>>
>> throttle: Both throttle_group_co_io_limits_intercept() and
>> bdrv_co_pwrite_zeroes() are 64bit.
>>
>> vmdk: pass to vmdk_pwritev which is 64bit
>>
>> quorum: pass to quorum_co_pwritev() which is 64bit
>>
>> preallocated: pass to handle_write() and bdrv_co_pwrite_zeroes(), both
>
> File is named preallocate.c, the 'd' seems odd. Worth sorting this
> before qcow2 in the commit message?
I think yes
>
>> 64bit.
>>
>> Hooray!
>>
>> At this point all block drivers are prepared to 64bit write-zero
>> requests or has explicitly set max_pwrite_zeroes.
>
> are prepared to support 64bit write-zero requests, or have explicitly set
>
>>
>> Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
>> ---
>
>> +++ b/block/iscsi.c
>> @@ -1205,15 +1205,16 @@ out_unlock:
>>
>> static int
>> coroutine_fn iscsi_co_pwrite_zeroes(BlockDriverState *bs, int64_t offset,
>> - int bytes, BdrvRequestFlags flags)
>> + int64_t bytes, BdrvRequestFlags flags)
>> {
>> IscsiLun *iscsilun = bs->opaque;
>> struct IscsiTask iTask;
>> uint64_t lba;
>> - uint32_t nb_blocks;
>> + uint64_t nb_blocks;
>> bool use_16_for_ws = iscsilun->use_16_for_rw;
>> int r = 0;
>>
>> +
>> if (!is_byte_request_lun_aligned(offset, bytes, iscsilun)) {
>
> Why the added blank line here?
mistake
>
>> return -ENOTSUP;
>> }
>> @@ -1250,11 +1251,21 @@ coroutine_fn iscsi_co_pwrite_zeroes(BlockDriverState *bs, int64_t offset,
>> iscsi_co_init_iscsitask(iscsilun, &iTask);
>> retry:
>> if (use_16_for_ws) {
>> + /*
>> + * iscsi_writesame16_task num_blocks argument is uint32_t. We rely here
>> + * on our max_pwrite_zeroes limit.
>> + */
>> + assert(nb_blocks < UINT32_MAX);
>> iTask.task = iscsi_writesame16_task(iscsilun->iscsi, iscsilun->lun, lba,
>> iscsilun->zeroblock, iscsilun->block_size,
>> nb_blocks, 0, !!(flags & BDRV_REQ_MAY_UNMAP),
>> 0, 0, iscsi_co_generic_cb, &iTask);
>> } else {
>> + /*
>> + * iscsi_writesame10_task num_blocks argument is uint16_t. We rely here
>> + * on our max_pwrite_zeroes limit.
>> + */
>> + assert(nb_blocks < UINT16_MAX);
>> iTask.task = iscsi_writesame10_task(iscsilun->iscsi, iscsilun->lun, lba,
>> iscsilun->zeroblock, iscsilun->block_size,
>> nb_blocks, 0, !!(flags & BDRV_REQ_MAY_UNMAP),
>
> Thanks - these assertions and comments are indeed a lifesaver for
> future maintenance.
>
>> @@ -2074,10 +2085,10 @@ static void iscsi_refresh_limits(BlockDriverState *bs, Error **errp)
>> bs->bl.pdiscard_alignment = iscsilun->block_size;
>> }
>>
>> - if (iscsilun->bl.max_ws_len < 0xffffffff / block_size) {
>> - bs->bl.max_pwrite_zeroes =
>> - iscsilun->bl.max_ws_len * iscsilun->block_size;
>> - }
>> + bs->bl.max_pwrite_zeroes =
>> + MIN_NON_ZERO(iscsilun->bl.max_ws_len * iscsilun->block_size,
>> + max_xfer_len * iscsilun->block_size);
>
> Works because max_xfer_len is 0xffff if we are stuck using
> writesame10, or 0xffffffff if we are able to use writesame16.
>
>> +++ b/block/nvme.c
>> @@ -1266,19 +1266,29 @@ static coroutine_fn int nvme_co_flush(BlockDriverState *bs)
>>
>> static coroutine_fn int nvme_co_pwrite_zeroes(BlockDriverState *bs,
>> int64_t offset,
>> - int bytes,
>> + int64_t bytes,
>> BdrvRequestFlags flags)
>> {
>> BDRVNVMeState *s = bs->opaque;
>> NVMeQueuePair *ioq = s->queues[INDEX_IO(0)];
>> NVMeRequest *req;
>> -
>> - uint32_t cdw12 = ((bytes >> s->blkshift) - 1) & 0xFFFF;
>> + uint32_t cdw12;
>>
>> if (!s->supports_write_zeroes) {
>> return -ENOTSUP;
>> }
>>
>> + if (bytes == 0) {
>> + return 0;
>> + }
>> +
>> + cdw12 = ((bytes >> s->blkshift) - 1) & 0xFFFF;
>> + /*
>> + * We should not loose information. pwrite_zeroes_alignment and
>
> lose (this is a common English typo; "lose" rhymes with "use" and is
> opposite of "gain", while "loose" rhymes with "goose" and is opposite
> of "tighten")
>
>> +++ b/block/qed.c
>
>> @@ -1408,6 +1409,12 @@ static int coroutine_fn bdrv_qed_co_pwrite_zeroes(BlockDriverState *bs,
>> */
>> QEMUIOVector qiov = QEMU_IOVEC_INIT_BUF(qiov, NULL, bytes);
>>
>> + /*
>> + * QED is not prepared for 62bit write-zero requests, so rely on
>
> 64bit
>
>> + * max_pwrite_zeroes.
>> + */
>> + assert(bytes <= INT_MAX);
>> +
>> /* Fall back if the request is not aligned */
>> if (qed_offset_into_cluster(s, offset) ||
>> qed_offset_into_cluster(s, bytes)) {
>
> Reviewed-by: Eric Blake <eblake@redhat.com>
>
Thanks!
--
Best regards,
Vladimir
^ permalink raw reply [flat|nested] 22+ messages in thread
* [PATCH v5 08/11] block/io: allow 64bit write-zeroes requests
2021-05-05 7:49 [PATCH v5 00/11] 64bit block-layer: part II Vladimir Sementsov-Ogievskiy
` (6 preceding siblings ...)
2021-05-05 7:49 ` [PATCH v5 07/11] block: use int64_t instead of int in driver write_zeroes handlers Vladimir Sementsov-Ogievskiy
@ 2021-05-05 7:49 ` Vladimir Sementsov-Ogievskiy
2021-06-07 15:03 ` Eric Blake
2021-05-05 7:49 ` [PATCH v5 09/11] block: make BlockLimits::max_pdiscard 64bit Vladimir Sementsov-Ogievskiy
` (4 subsequent siblings)
12 siblings, 1 reply; 22+ messages in thread
From: Vladimir Sementsov-Ogievskiy @ 2021-05-05 7:49 UTC (permalink / raw)
To: qemu-block
Cc: qemu-devel, eblake, stefanha, kwolf, mreitz, vsementsov, Fam Zheng
Now, when all drivers are updated by previous commit, we can drop two
last limiters on write-zeroes path: INT_MAX in
bdrv_co_do_pwrite_zeroes() and bdrv_check_request32() in
bdrv_co_pwritev_part().
Now everything is prepared for implementing incredibly cool and fast
big-write-zeroes in NBD and qcow2. And any other driver which wants it
of course.
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
---
block/io.c | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/block/io.c b/block/io.c
index 0648561b15..195b68b19e 100644
--- a/block/io.c
+++ b/block/io.c
@@ -1863,7 +1863,8 @@ static int coroutine_fn bdrv_co_do_pwrite_zeroes(BlockDriverState *bs,
int head = 0;
int tail = 0;
- int64_t max_write_zeroes = MIN_NON_ZERO(bs->bl.max_pwrite_zeroes, INT_MAX);
+ int64_t max_write_zeroes = MIN_NON_ZERO(bs->bl.max_pwrite_zeroes,
+ INT64_MAX);
int alignment = MAX(bs->bl.pwrite_zeroes_alignment,
bs->bl.request_alignment);
int max_transfer = MIN_NON_ZERO(bs->bl.max_transfer, MAX_BOUNCE_BUFFER);
@@ -2239,7 +2240,11 @@ int coroutine_fn bdrv_co_pwritev_part(BdrvChild *child,
return -ENOMEDIUM;
}
- ret = bdrv_check_request32(offset, bytes, qiov, qiov_offset);
+ if (flags & BDRV_REQ_ZERO_WRITE) {
+ ret = bdrv_check_qiov_request(offset, bytes, qiov, qiov_offset, NULL);
+ } else {
+ ret = bdrv_check_request32(offset, bytes, qiov, qiov_offset);
+ }
if (ret < 0) {
return ret;
}
--
2.29.2
^ permalink raw reply related [flat|nested] 22+ messages in thread* Re: [PATCH v5 08/11] block/io: allow 64bit write-zeroes requests
2021-05-05 7:49 ` [PATCH v5 08/11] block/io: allow 64bit write-zeroes requests Vladimir Sementsov-Ogievskiy
@ 2021-06-07 15:03 ` Eric Blake
0 siblings, 0 replies; 22+ messages in thread
From: Eric Blake @ 2021-06-07 15:03 UTC (permalink / raw)
To: Vladimir Sementsov-Ogievskiy
Cc: kwolf, Fam Zheng, qemu-block, qemu-devel, mreitz, stefanha
On Wed, May 05, 2021 at 10:49:58AM +0300, Vladimir Sementsov-Ogievskiy wrote:
> Now, when all drivers are updated by previous commit, we can drop two
s/Now, when/Now that/
> last limiters on write-zeroes path: INT_MAX in
> bdrv_co_do_pwrite_zeroes() and bdrv_check_request32() in
> bdrv_co_pwritev_part().
>
> Now everything is prepared for implementing incredibly cool and fast
> big-write-zeroes in NBD and qcow2. And any other driver which wants it
> of course.
I got a chuckle out of this incredibly cool description ;)
>
> Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
> ---
> block/io.c | 9 +++++++--
> 1 file changed, 7 insertions(+), 2 deletions(-)
>
Reviewed-by: Eric Blake <eblake@redhat.com>
--
Eric Blake, Principal Software Engineer
Red Hat, Inc. +1-919-301-3266
Virtualization: qemu.org | libvirt.org
^ permalink raw reply [flat|nested] 22+ messages in thread
* [PATCH v5 09/11] block: make BlockLimits::max_pdiscard 64bit
2021-05-05 7:49 [PATCH v5 00/11] 64bit block-layer: part II Vladimir Sementsov-Ogievskiy
` (7 preceding siblings ...)
2021-05-05 7:49 ` [PATCH v5 08/11] block/io: allow 64bit write-zeroes requests Vladimir Sementsov-Ogievskiy
@ 2021-05-05 7:49 ` Vladimir Sementsov-Ogievskiy
2021-06-07 15:05 ` Eric Blake
2021-05-05 7:50 ` [PATCH v5 10/11] block: use int64_t instead of int in driver discard handlers Vladimir Sementsov-Ogievskiy
` (3 subsequent siblings)
12 siblings, 1 reply; 22+ messages in thread
From: Vladimir Sementsov-Ogievskiy @ 2021-05-05 7:49 UTC (permalink / raw)
To: qemu-block
Cc: qemu-devel, eblake, stefanha, kwolf, mreitz, vsementsov, Fam Zheng
We are going to support 64 bit discard requests. Now update the
limit variable. It's absolutely safe. The variable is set in some
drivers, and used in bdrv_co_pdiscard().
Update also max_pdiscard variable in bdrv_co_pdiscard(), so that
bdrv_co_pdiscard() is now prepared to 64bit requests. The remaining
logic including num, offset and bytes variables is already
supporting 64bit requests.
So the only thing that prevents 64 bit requests is limiting
max_pdiscard variable to INT_MAX in bdrv_co_pdiscard().
We'll drop this limitation after updating all block drivers.
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
---
include/block/block_int.h | 11 ++++++-----
block/io.c | 3 ++-
2 files changed, 8 insertions(+), 6 deletions(-)
diff --git a/include/block/block_int.h b/include/block/block_int.h
index 5734f44e59..cb36ba93a6 100644
--- a/include/block/block_int.h
+++ b/include/block/block_int.h
@@ -664,11 +664,12 @@ typedef struct BlockLimits {
* otherwise. */
uint32_t request_alignment;
- /* Maximum number of bytes that can be discarded at once (since it
- * is signed, it must be < 2G, if set). Must be multiple of
- * pdiscard_alignment, but need not be power of 2. May be 0 if no
- * inherent 32-bit limit */
- int32_t max_pdiscard;
+ /*
+ * Maximum number of bytes that can be discarded at once. Must be multiple
+ * of pdiscard_alignment, but need not be power of 2. May be 0 if no
+ * inherent 64-bit limit.
+ */
+ int64_t max_pdiscard;
/* Optimal alignment for discard requests in bytes. A power of 2
* is best but not mandatory. Must be a multiple of
diff --git a/block/io.c b/block/io.c
index 195b68b19e..a7edb1ef54 100644
--- a/block/io.c
+++ b/block/io.c
@@ -2991,7 +2991,8 @@ int coroutine_fn bdrv_co_pdiscard(BdrvChild *child, int64_t offset,
int64_t bytes)
{
BdrvTrackedRequest req;
- int max_pdiscard, ret;
+ int ret;
+ int64_t max_pdiscard;
int head, tail, align;
BlockDriverState *bs = child->bs;
--
2.29.2
^ permalink raw reply related [flat|nested] 22+ messages in thread* Re: [PATCH v5 09/11] block: make BlockLimits::max_pdiscard 64bit
2021-05-05 7:49 ` [PATCH v5 09/11] block: make BlockLimits::max_pdiscard 64bit Vladimir Sementsov-Ogievskiy
@ 2021-06-07 15:05 ` Eric Blake
0 siblings, 0 replies; 22+ messages in thread
From: Eric Blake @ 2021-06-07 15:05 UTC (permalink / raw)
To: Vladimir Sementsov-Ogievskiy
Cc: kwolf, Fam Zheng, qemu-block, qemu-devel, mreitz, stefanha
On Wed, May 05, 2021 at 10:49:59AM +0300, Vladimir Sementsov-Ogievskiy wrote:
> We are going to support 64 bit discard requests. Now update the
> limit variable. It's absolutely safe. The variable is set in some
> drivers, and used in bdrv_co_pdiscard().
>
> Update also max_pdiscard variable in bdrv_co_pdiscard(), so that
> bdrv_co_pdiscard() is now prepared to 64bit requests. The remaining
s/to/for/
> logic including num, offset and bytes variables is already
> supporting 64bit requests.
>
> So the only thing that prevents 64 bit requests is limiting
> max_pdiscard variable to INT_MAX in bdrv_co_pdiscard().
> We'll drop this limitation after updating all block drivers.
>
> Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
> ---
> include/block/block_int.h | 11 ++++++-----
> block/io.c | 3 ++-
> 2 files changed, 8 insertions(+), 6 deletions(-)
>
Deceptively simple for what it entails, but I agree that we are safe.
Reviewed-by: Eric Blake <eblake@redhat.com>
--
Eric Blake, Principal Software Engineer
Red Hat, Inc. +1-919-301-3266
Virtualization: qemu.org | libvirt.org
^ permalink raw reply [flat|nested] 22+ messages in thread
* [PATCH v5 10/11] block: use int64_t instead of int in driver discard handlers
2021-05-05 7:49 [PATCH v5 00/11] 64bit block-layer: part II Vladimir Sementsov-Ogievskiy
` (8 preceding siblings ...)
2021-05-05 7:49 ` [PATCH v5 09/11] block: make BlockLimits::max_pdiscard 64bit Vladimir Sementsov-Ogievskiy
@ 2021-05-05 7:50 ` Vladimir Sementsov-Ogievskiy
2021-06-07 18:13 ` Eric Blake
2021-05-05 7:50 ` [PATCH v5 11/11] block/io: allow 64bit discard requests Vladimir Sementsov-Ogievskiy
` (2 subsequent siblings)
12 siblings, 1 reply; 22+ messages in thread
From: Vladimir Sementsov-Ogievskiy @ 2021-05-05 7:50 UTC (permalink / raw)
To: qemu-block
Cc: qemu-devel, eblake, stefanha, kwolf, mreitz, vsementsov,
John Snow, Ari Sundholm, Pavel Dovgalyuk, Paolo Bonzini,
Ronnie Sahlberg, Peter Lieven, Fam Zheng, Liu Yuan,
open list:GLUSTER
We are generally moving to int64_t for both offset and bytes parameters
on all io paths.
Main motivation is realization of 64-bit write_zeroes operation for
fast zeroing large disk chunks, up to the whole disk.
We chose signed type, to be consistent with off_t (which is signed) and
with possibility for signed return type (where negative value means
error).
So, convert driver discard handlers bytes parameter to int64_t.
The only caller of all updated function is bdrv_co_pdiscard in
block/io.c. It is already prepared to work with 64bit requests, but
pass at most max(bs->bl.max_pdiscard, INT_MAX) to the driver.
Let's look at all updated functions:
backup-top: pass to bdrv_co_pdiscard which is 64bit
blkdebug: all calculations are still OK, thanks to
bdrv_check_qiov_request().
both rule_check and bdrv_co_pdiscard are 64bit
blklogwrites: pass to blk_loc_writes_co_log which is 64bit
blkreply, copy-on-read, filter-compress: pass to bdrv_co_pdiscard, OK
file-posix: one handler calls raw_account_discard() is 64bit and both
handlers calls raw_do_pdiscard(). Update raw_do_pdiscard, which pass
to RawPosixAIOData::aio_nbytes, which is 64bit (and calls
raw_account_discard())
gluster: somehow, third argument of glfs_discard_async is size_t.
Let's set max_pdiscard accordingly.
iscsi: iscsi_allocmap_set_invalid is 64bit,
!is_byte_request_lun_aligned is 64bit.
list.num is uint32_t. Let's clarify max_pdiscard and
pdiscard_alignment.
mirror_top, preallocate: pass to bdrv_mirror_top_do_write() which is
64bit
nbd: protocol limitation. max_pdiscard is alredy set strict enough,
keep it as is for now.
nvmd: buf.nlb is uint32_t and we do shift. So, add corresponding limits
to nvme_refresh_limits().
qcow2: calculations are still OK, thanks to bdrv_check_qiov_request(),
qcow2_cluster_discard() is 64bit.
raw-format: raw_adjust_offset() is 64bit, bdrv_co_pdiscard too.
sheepdog: the format is deprecated. Don't care and just make old
INT_MAX limit to be explicit
throttle: pass to bdrv_co_pdiscard() which is 64bit and to
throttle_group_co_io_limits_intercept() which is 64bit as well.
test-block-iothread: bytes argument is unused
Great! Now all drivers are prepared to 64bit discard requests or has
explicit max_pdiscard limit.
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
---
include/block/block_int.h | 2 +-
block/backup-top.c | 2 +-
block/blkdebug.c | 2 +-
block/blklogwrites.c | 4 ++--
block/blkreplay.c | 2 +-
block/copy-on-read.c | 2 +-
block/file-posix.c | 7 ++++---
block/filter-compress.c | 2 +-
block/gluster.c | 7 +++++--
block/iscsi.c | 10 +++++-----
block/mirror.c | 2 +-
block/nbd.c | 6 ++++--
block/nvme.c | 14 +++++++++++++-
block/preallocate.c | 2 +-
block/qcow2.c | 2 +-
block/raw-format.c | 2 +-
block/sheepdog.c | 15 ++++++++++++++-
block/throttle.c | 2 +-
tests/unit/test-block-iothread.c | 2 +-
block/trace-events | 4 ++--
20 files changed, 61 insertions(+), 30 deletions(-)
diff --git a/include/block/block_int.h b/include/block/block_int.h
index cb36ba93a6..adc5ea12cc 100644
--- a/include/block/block_int.h
+++ b/include/block/block_int.h
@@ -302,7 +302,7 @@ struct BlockDriver {
int coroutine_fn (*bdrv_co_pwrite_zeroes)(BlockDriverState *bs,
int64_t offset, int64_t bytes, BdrvRequestFlags flags);
int coroutine_fn (*bdrv_co_pdiscard)(BlockDriverState *bs,
- int64_t offset, int bytes);
+ int64_t offset, int64_t bytes);
/* Map [offset, offset + nbytes) range onto a child of @bs to copy from,
* and invoke bdrv_co_copy_range_from(child, ...), or invoke
diff --git a/block/backup-top.c b/block/backup-top.c
index f193cc549c..45240aef9e 100644
--- a/block/backup-top.c
+++ b/block/backup-top.c
@@ -64,7 +64,7 @@ static coroutine_fn int backup_top_cbw(BlockDriverState *bs, uint64_t offset,
}
static int coroutine_fn backup_top_co_pdiscard(BlockDriverState *bs,
- int64_t offset, int bytes)
+ int64_t offset, int64_t bytes)
{
int ret = backup_top_cbw(bs, offset, bytes, 0);
if (ret < 0) {
diff --git a/block/blkdebug.c b/block/blkdebug.c
index c81cb9cb1a..2d98a33982 100644
--- a/block/blkdebug.c
+++ b/block/blkdebug.c
@@ -700,7 +700,7 @@ static int coroutine_fn blkdebug_co_pwrite_zeroes(BlockDriverState *bs,
}
static int coroutine_fn blkdebug_co_pdiscard(BlockDriverState *bs,
- int64_t offset, int bytes)
+ int64_t offset, int64_t bytes)
{
uint32_t align = bs->bl.pdiscard_alignment;
int err;
diff --git a/block/blklogwrites.c b/block/blklogwrites.c
index d7ae64c22d..f7a251e91f 100644
--- a/block/blklogwrites.c
+++ b/block/blklogwrites.c
@@ -484,9 +484,9 @@ static int coroutine_fn blk_log_writes_co_flush_to_disk(BlockDriverState *bs)
}
static int coroutine_fn
-blk_log_writes_co_pdiscard(BlockDriverState *bs, int64_t offset, int count)
+blk_log_writes_co_pdiscard(BlockDriverState *bs, int64_t offset, int64_t bytes)
{
- return blk_log_writes_co_log(bs, offset, count, NULL, 0,
+ return blk_log_writes_co_log(bs, offset, bytes, NULL, 0,
blk_log_writes_co_do_file_pdiscard,
LOG_DISCARD_FLAG, false);
}
diff --git a/block/blkreplay.c b/block/blkreplay.c
index 89d74a3cca..dcbe780ddb 100644
--- a/block/blkreplay.c
+++ b/block/blkreplay.c
@@ -105,7 +105,7 @@ static int coroutine_fn blkreplay_co_pwrite_zeroes(BlockDriverState *bs,
}
static int coroutine_fn blkreplay_co_pdiscard(BlockDriverState *bs,
- int64_t offset, int bytes)
+ int64_t offset, int64_t bytes)
{
uint64_t reqid = blkreplay_next_id();
int ret = bdrv_co_pdiscard(bs->file, offset, bytes);
diff --git a/block/copy-on-read.c b/block/copy-on-read.c
index 758a5d44d5..c29cfdd10e 100644
--- a/block/copy-on-read.c
+++ b/block/copy-on-read.c
@@ -214,7 +214,7 @@ static int coroutine_fn cor_co_pwrite_zeroes(BlockDriverState *bs,
static int coroutine_fn cor_co_pdiscard(BlockDriverState *bs,
- int64_t offset, int bytes)
+ int64_t offset, int64_t bytes)
{
return bdrv_co_pdiscard(bs->file, offset, bytes);
}
diff --git a/block/file-posix.c b/block/file-posix.c
index 6114bdd308..6959e2feba 100644
--- a/block/file-posix.c
+++ b/block/file-posix.c
@@ -2875,7 +2875,8 @@ static void raw_account_discard(BDRVRawState *s, uint64_t nbytes, int ret)
}
static coroutine_fn int
-raw_do_pdiscard(BlockDriverState *bs, int64_t offset, int bytes, bool blkdev)
+raw_do_pdiscard(BlockDriverState *bs, int64_t offset, int64_t bytes,
+ bool blkdev)
{
BDRVRawState *s = bs->opaque;
RawPosixAIOData acb;
@@ -2899,7 +2900,7 @@ raw_do_pdiscard(BlockDriverState *bs, int64_t offset, int bytes, bool blkdev)
}
static coroutine_fn int
-raw_co_pdiscard(BlockDriverState *bs, int64_t offset, int bytes)
+raw_co_pdiscard(BlockDriverState *bs, int64_t offset, int64_t bytes)
{
return raw_do_pdiscard(bs, offset, bytes, false);
}
@@ -3530,7 +3531,7 @@ static int fd_open(BlockDriverState *bs)
}
static coroutine_fn int
-hdev_co_pdiscard(BlockDriverState *bs, int64_t offset, int bytes)
+hdev_co_pdiscard(BlockDriverState *bs, int64_t offset, int64_t bytes)
{
BDRVRawState *s = bs->opaque;
int ret;
diff --git a/block/filter-compress.c b/block/filter-compress.c
index fb85686b69..d5be538619 100644
--- a/block/filter-compress.c
+++ b/block/filter-compress.c
@@ -94,7 +94,7 @@ static int coroutine_fn compress_co_pwrite_zeroes(BlockDriverState *bs,
static int coroutine_fn compress_co_pdiscard(BlockDriverState *bs,
- int64_t offset, int bytes)
+ int64_t offset, int64_t bytes)
{
return bdrv_co_pdiscard(bs->file, offset, bytes);
}
diff --git a/block/gluster.c b/block/gluster.c
index 6a17b37c0c..066fdf60fa 100644
--- a/block/gluster.c
+++ b/block/gluster.c
@@ -891,6 +891,7 @@ out:
static void qemu_gluster_refresh_limits(BlockDriverState *bs, Error **errp)
{
bs->bl.max_transfer = GLUSTER_MAX_TRANSFER;
+ bs->bl.max_pdiscard = SIZE_MAX;
}
static int qemu_gluster_reopen_prepare(BDRVReopenState *state,
@@ -1297,18 +1298,20 @@ error:
#ifdef CONFIG_GLUSTERFS_DISCARD
static coroutine_fn int qemu_gluster_co_pdiscard(BlockDriverState *bs,
- int64_t offset, int size)
+ int64_t offset, int64_t bytes)
{
int ret;
GlusterAIOCB acb;
BDRVGlusterState *s = bs->opaque;
+ assert(bytes <= SIZE_MAX); /* rely on max_pdiscard */
+
acb.size = 0;
acb.ret = 0;
acb.coroutine = qemu_coroutine_self();
acb.aio_context = bdrv_get_aio_context(bs);
- ret = glfs_discard_async(s->fd, offset, size, gluster_finish_aiocb, &acb);
+ ret = glfs_discard_async(s->fd, offset, bytes, gluster_finish_aiocb, &acb);
if (ret < 0) {
return -errno;
}
diff --git a/block/iscsi.c b/block/iscsi.c
index b90ed67377..297919ebc2 100644
--- a/block/iscsi.c
+++ b/block/iscsi.c
@@ -1141,7 +1141,8 @@ iscsi_getlength(BlockDriverState *bs)
}
static int
-coroutine_fn iscsi_co_pdiscard(BlockDriverState *bs, int64_t offset, int bytes)
+coroutine_fn iscsi_co_pdiscard(BlockDriverState *bs, int64_t offset,
+ int64_t bytes)
{
IscsiLun *iscsilun = bs->opaque;
struct IscsiTask iTask;
@@ -2075,10 +2076,9 @@ static void iscsi_refresh_limits(BlockDriverState *bs, Error **errp)
}
if (iscsilun->lbp.lbpu) {
- if (iscsilun->bl.max_unmap < 0xffffffff / block_size) {
- bs->bl.max_pdiscard =
- iscsilun->bl.max_unmap * iscsilun->block_size;
- }
+ bs->bl.max_pdiscard =
+ MIN_NON_ZERO(iscsilun->bl.max_unmap * iscsilun->block_size,
+ (uint64_t)UINT32_MAX * iscsilun->block_size);
bs->bl.pdiscard_alignment =
iscsilun->bl.opt_unmap_gran * iscsilun->block_size;
} else {
diff --git a/block/mirror.c b/block/mirror.c
index f0a3eac216..3dbe696873 100644
--- a/block/mirror.c
+++ b/block/mirror.c
@@ -1486,7 +1486,7 @@ static int coroutine_fn bdrv_mirror_top_pwrite_zeroes(BlockDriverState *bs,
}
static int coroutine_fn bdrv_mirror_top_pdiscard(BlockDriverState *bs,
- int64_t offset, int bytes)
+ int64_t offset, int64_t bytes)
{
return bdrv_mirror_top_do_write(bs, MIRROR_METHOD_DISCARD, offset, bytes,
NULL, 0);
diff --git a/block/nbd.c b/block/nbd.c
index bf56735e4a..03f74b6f60 100644
--- a/block/nbd.c
+++ b/block/nbd.c
@@ -1680,15 +1680,17 @@ static int nbd_client_co_flush(BlockDriverState *bs)
}
static int nbd_client_co_pdiscard(BlockDriverState *bs, int64_t offset,
- int bytes)
+ int64_t bytes)
{
BDRVNBDState *s = (BDRVNBDState *)bs->opaque;
NBDRequest request = {
.type = NBD_CMD_TRIM,
.from = offset,
- .len = bytes,
+ .len = bytes, /* len is uint32_t */
};
+ assert(bytes <= UINT32_MAX); /* rely on max_pdiscard */
+
assert(!(s->info.flags & NBD_FLAG_READ_ONLY));
if (!(s->info.flags & NBD_FLAG_SEND_TRIM) || !bytes) {
return 0;
diff --git a/block/nvme.c b/block/nvme.c
index 51fc65fc91..1d59514f63 100644
--- a/block/nvme.c
+++ b/block/nvme.c
@@ -1330,7 +1330,7 @@ static coroutine_fn int nvme_co_pwrite_zeroes(BlockDriverState *bs,
static int coroutine_fn nvme_co_pdiscard(BlockDriverState *bs,
int64_t offset,
- int bytes)
+ int64_t bytes)
{
BDRVNVMeState *s = bs->opaque;
NVMeQueuePair *ioq = s->queues[INDEX_IO(0)];
@@ -1357,6 +1357,14 @@ static int coroutine_fn nvme_co_pdiscard(BlockDriverState *bs,
assert(s->queue_count > 1);
+ /*
+ * Filling the @buf requires @offset and @bytes to satisfy restrictions
+ * defined in nvme_refresh_limits().
+ */
+ assert(QEMU_IS_ALIGNED(bytes, 1UL << s->blkshift));
+ assert(QEMU_IS_ALIGNED(offset, 1UL << s->blkshift));
+ assert((bytes >> s->blkshift) <= UINT32_MAX);
+
buf = qemu_try_memalign(s->page_size, s->page_size);
if (!buf) {
return -ENOMEM;
@@ -1460,6 +1468,10 @@ static void nvme_refresh_limits(BlockDriverState *bs, Error **errp)
bs->bl.max_pwrite_zeroes = 1ULL << (s->blkshift + 16);
bs->bl.pwrite_zeroes_alignment = MAX(bs->bl.request_alignment,
1UL << s->blkshift);
+
+ bs->bl.max_pdiscard = (uint64_t)UINT32_MAX << s->blkshift;
+ bs->bl.pdiscard_alignment = MAX(bs->bl.request_alignment,
+ 1UL << s->blkshift);
}
static void nvme_detach_aio_context(BlockDriverState *bs)
diff --git a/block/preallocate.c b/block/preallocate.c
index 99e28d9f08..1d4233f730 100644
--- a/block/preallocate.c
+++ b/block/preallocate.c
@@ -235,7 +235,7 @@ static coroutine_fn int preallocate_co_preadv_part(
}
static int coroutine_fn preallocate_co_pdiscard(BlockDriverState *bs,
- int64_t offset, int bytes)
+ int64_t offset, int64_t bytes)
{
return bdrv_co_pdiscard(bs->file, offset, bytes);
}
diff --git a/block/qcow2.c b/block/qcow2.c
index 59c5137410..442917b85d 100644
--- a/block/qcow2.c
+++ b/block/qcow2.c
@@ -3968,7 +3968,7 @@ static coroutine_fn int qcow2_co_pwrite_zeroes(BlockDriverState *bs,
}
static coroutine_fn int qcow2_co_pdiscard(BlockDriverState *bs,
- int64_t offset, int bytes)
+ int64_t offset, int64_t bytes)
{
int ret;
BDRVQcow2State *s = bs->opaque;
diff --git a/block/raw-format.c b/block/raw-format.c
index 4e9304c63b..45846e42d5 100644
--- a/block/raw-format.c
+++ b/block/raw-format.c
@@ -302,7 +302,7 @@ static int coroutine_fn raw_co_pwrite_zeroes(BlockDriverState *bs,
}
static int coroutine_fn raw_co_pdiscard(BlockDriverState *bs,
- int64_t offset, int bytes)
+ int64_t offset, int64_t bytes)
{
int ret;
diff --git a/block/sheepdog.c b/block/sheepdog.c
index a45c73826d..80e04dccfd 100644
--- a/block/sheepdog.c
+++ b/block/sheepdog.c
@@ -3101,7 +3101,7 @@ static int sd_load_vmstate(BlockDriverState *bs, QEMUIOVector *qiov,
static coroutine_fn int sd_co_pdiscard(BlockDriverState *bs, int64_t offset,
- int bytes)
+ int64_t bytes)
{
SheepdogAIOCB acb;
BDRVSheepdogState *s = bs->opaque;
@@ -3113,6 +3113,8 @@ static coroutine_fn int sd_co_pdiscard(BlockDriverState *bs, int64_t offset,
return 0;
}
+ assert(bytes <= INT_MAX); /* thanks to max_pdiscard */
+
memset(&discard_iov, 0, sizeof(discard_iov));
memset(&iov, 0, sizeof(iov));
iov.iov_base = &zero;
@@ -3186,6 +3188,11 @@ static int64_t sd_get_allocated_file_size(BlockDriverState *bs)
return size;
}
+static void sd_refresh_limits(BlockDriverState *bs, Error **errp)
+{
+ bs->bl.max_pdiscard = INT_MAX;
+}
+
static QemuOptsList sd_create_opts = {
.name = "sheepdog-create-opts",
.head = QTAILQ_HEAD_INITIALIZER(sd_create_opts.head),
@@ -3269,6 +3276,8 @@ static BlockDriver bdrv_sheepdog = {
.create_opts = &sd_create_opts,
.strong_runtime_opts = sd_strong_runtime_opts,
+
+ .bdrv_refresh_limits = sd_refresh_limits,
};
static BlockDriver bdrv_sheepdog_tcp = {
@@ -3307,6 +3316,8 @@ static BlockDriver bdrv_sheepdog_tcp = {
.create_opts = &sd_create_opts,
.strong_runtime_opts = sd_strong_runtime_opts,
+
+ .bdrv_refresh_limits = sd_refresh_limits,
};
static BlockDriver bdrv_sheepdog_unix = {
@@ -3345,6 +3356,8 @@ static BlockDriver bdrv_sheepdog_unix = {
.create_opts = &sd_create_opts,
.strong_runtime_opts = sd_strong_runtime_opts,
+
+ .bdrv_refresh_limits = sd_refresh_limits,
};
static void bdrv_sheepdog_init(void)
diff --git a/block/throttle.c b/block/throttle.c
index c13fe9067f..6e8d52fa24 100644
--- a/block/throttle.c
+++ b/block/throttle.c
@@ -145,7 +145,7 @@ static int coroutine_fn throttle_co_pwrite_zeroes(BlockDriverState *bs,
}
static int coroutine_fn throttle_co_pdiscard(BlockDriverState *bs,
- int64_t offset, int bytes)
+ int64_t offset, int64_t bytes)
{
ThrottleGroupMember *tgm = bs->opaque;
throttle_group_co_io_limits_intercept(tgm, bytes, true);
diff --git a/tests/unit/test-block-iothread.c b/tests/unit/test-block-iothread.c
index 50b8718b2a..9656814814 100644
--- a/tests/unit/test-block-iothread.c
+++ b/tests/unit/test-block-iothread.c
@@ -48,7 +48,7 @@ static int coroutine_fn bdrv_test_co_pwritev(BlockDriverState *bs,
}
static int coroutine_fn bdrv_test_co_pdiscard(BlockDriverState *bs,
- int64_t offset, int bytes)
+ int64_t offset, int64_t bytes)
{
return 0;
}
diff --git a/block/trace-events b/block/trace-events
index 3edd2899c2..3b86c03b2f 100644
--- a/block/trace-events
+++ b/block/trace-events
@@ -152,8 +152,8 @@ nvme_write_zeroes(void *s, uint64_t offset, uint64_t bytes, int flags) "s %p off
nvme_qiov_unaligned(const void *qiov, int n, void *base, size_t size, int align) "qiov %p n %d base %p size 0x%zx align 0x%x"
nvme_prw_buffered(void *s, uint64_t offset, uint64_t bytes, int niov, int is_write) "s %p offset 0x%"PRIx64" bytes %"PRId64" niov %d is_write %d"
nvme_rw_done(void *s, int is_write, uint64_t offset, uint64_t bytes, int ret) "s %p is_write %d offset 0x%"PRIx64" bytes %"PRId64" ret %d"
-nvme_dsm(void *s, uint64_t offset, uint64_t bytes) "s %p offset 0x%"PRIx64" bytes %"PRId64""
-nvme_dsm_done(void *s, uint64_t offset, uint64_t bytes, int ret) "s %p offset 0x%"PRIx64" bytes %"PRId64" ret %d"
+nvme_dsm(void *s, int64_t offset, int64_t bytes) "s %p offset 0x%"PRIx64" bytes %"PRId64""
+nvme_dsm_done(void *s, int64_t offset, int64_t bytes, int ret) "s %p offset 0x%"PRIx64" bytes %"PRId64" ret %d"
nvme_dma_map_flush(void *s) "s %p"
nvme_free_req_queue_wait(void *s, unsigned q_index) "s %p q #%u"
nvme_create_queue_pair(unsigned q_index, void *q, unsigned size, void *aio_context, int fd) "index %u q %p size %u aioctx %p fd %d"
--
2.29.2
^ permalink raw reply related [flat|nested] 22+ messages in thread* Re: [PATCH v5 10/11] block: use int64_t instead of int in driver discard handlers
2021-05-05 7:50 ` [PATCH v5 10/11] block: use int64_t instead of int in driver discard handlers Vladimir Sementsov-Ogievskiy
@ 2021-06-07 18:13 ` Eric Blake
2021-06-08 8:38 ` Vladimir Sementsov-Ogievskiy
0 siblings, 1 reply; 22+ messages in thread
From: Eric Blake @ 2021-06-07 18:13 UTC (permalink / raw)
To: Vladimir Sementsov-Ogievskiy
Cc: kwolf, Fam Zheng, open list:GLUSTER, Pavel Dovgalyuk, qemu-block,
Ronnie Sahlberg, Peter Lieven, qemu-devel, mreitz, stefanha,
Liu Yuan, Paolo Bonzini, John Snow, Ari Sundholm
On Wed, May 05, 2021 at 10:50:00AM +0300, Vladimir Sementsov-Ogievskiy wrote:
> We are generally moving to int64_t for both offset and bytes parameters
> on all io paths.
>
> Main motivation is realization of 64-bit write_zeroes operation for
> fast zeroing large disk chunks, up to the whole disk.
>
> We chose signed type, to be consistent with off_t (which is signed) and
> with possibility for signed return type (where negative value means
> error).
>
> So, convert driver discard handlers bytes parameter to int64_t.
>
> The only caller of all updated function is bdrv_co_pdiscard in
> block/io.c. It is already prepared to work with 64bit requests, but
> pass at most max(bs->bl.max_pdiscard, INT_MAX) to the driver.
>
> Let's look at all updated functions:
>
> backup-top: pass to bdrv_co_pdiscard which is 64bit
and to backup_top_cbw, but that is also 64-bit
>
> blkdebug: all calculations are still OK, thanks to
> bdrv_check_qiov_request().
> both rule_check and bdrv_co_pdiscard are 64bit
>
> blklogwrites: pass to blk_loc_writes_co_log which is 64bit
>
> blkreply, copy-on-read, filter-compress: pass to bdrv_co_pdiscard, OK
blkreplay
>
> file-posix: one handler calls raw_account_discard() is 64bit and both
> handlers calls raw_do_pdiscard(). Update raw_do_pdiscard, which pass
> to RawPosixAIOData::aio_nbytes, which is 64bit (and calls
> raw_account_discard())
>
> gluster: somehow, third argument of glfs_discard_async is size_t.
> Let's set max_pdiscard accordingly.
>
> iscsi: iscsi_allocmap_set_invalid is 64bit,
> !is_byte_request_lun_aligned is 64bit.
> list.num is uint32_t. Let's clarify max_pdiscard and
> pdiscard_alignment.
The patch tweaks max_pdiscard, but doesn't change pdiscard_alignment.
>
> mirror_top, preallocate: pass to bdrv_mirror_top_do_write() which is
> 64bit
file is mirror.c, not mirror-top.c. But it matches the BlockDriver
bdrv_mirror_top name. preallocate does not call
bdrv_mirror_top_do_write, so it's probably worth separating that line
out.
>
> nbd: protocol limitation. max_pdiscard is alredy set strict enough,
> keep it as is for now.
>
> nvmd: buf.nlb is uint32_t and we do shift. So, add corresponding limits
> to nvme_refresh_limits().
nvme
>
> qcow2: calculations are still OK, thanks to bdrv_check_qiov_request(),
> qcow2_cluster_discard() is 64bit.
>
> raw-format: raw_adjust_offset() is 64bit, bdrv_co_pdiscard too.
>
> sheepdog: the format is deprecated. Don't care and just make old
> INT_MAX limit to be explicit
>
> throttle: pass to bdrv_co_pdiscard() which is 64bit and to
> throttle_group_co_io_limits_intercept() which is 64bit as well.
>
> test-block-iothread: bytes argument is unused
>
> Great! Now all drivers are prepared to 64bit discard requests or has
> explicit max_pdiscard limit.
are prepared to handle 64-bit discard requests, or else have explicit
max_pdiscard limits.
>
> Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
> ---
> include/block/block_int.h | 2 +-
> block/backup-top.c | 2 +-
> block/blkdebug.c | 2 +-
> block/blklogwrites.c | 4 ++--
> block/blkreplay.c | 2 +-
> block/copy-on-read.c | 2 +-
> block/file-posix.c | 7 ++++---
> block/filter-compress.c | 2 +-
> block/gluster.c | 7 +++++--
> block/iscsi.c | 10 +++++-----
> block/mirror.c | 2 +-
> block/nbd.c | 6 ++++--
> block/nvme.c | 14 +++++++++++++-
> block/preallocate.c | 2 +-
> block/qcow2.c | 2 +-
> block/raw-format.c | 2 +-
> block/sheepdog.c | 15 ++++++++++++++-
> block/throttle.c | 2 +-
> tests/unit/test-block-iothread.c | 2 +-
> block/trace-events | 4 ++--
> 20 files changed, 61 insertions(+), 30 deletions(-)
>
> +++ b/block/gluster.c
> @@ -891,6 +891,7 @@ out:
> static void qemu_gluster_refresh_limits(BlockDriverState *bs, Error **errp)
> {
> bs->bl.max_transfer = GLUSTER_MAX_TRANSFER;
> + bs->bl.max_pdiscard = SIZE_MAX;
We probably want this to be MIN(GLUSTER_MAX_TRANSFER, SIZE_MAX). Also,
do we want to round it down to alignment boundaries?
> +++ b/block/iscsi.c
> @@ -1141,7 +1141,8 @@ iscsi_getlength(BlockDriverState *bs)
> }
>
> static int
> -coroutine_fn iscsi_co_pdiscard(BlockDriverState *bs, int64_t offset, int bytes)
> +coroutine_fn iscsi_co_pdiscard(BlockDriverState *bs, int64_t offset,
> + int64_t bytes)
> {
> IscsiLun *iscsilun = bs->opaque;
> struct IscsiTask iTask;
Did you want to add some sort of assert(bytes / iscsilun->block_size
<= UINT32_MAX), or a comment that we are relying on bl.max_pdiscard?
> +++ b/block/sheepdog.c
> +static void sd_refresh_limits(BlockDriverState *bs, Error **errp)
> +{
> + bs->bl.max_pdiscard = INT_MAX;
Do we want to round this down to alignment?
Looks close!
--
Eric Blake, Principal Software Engineer
Red Hat, Inc. +1-919-301-3266
Virtualization: qemu.org | libvirt.org
^ permalink raw reply [flat|nested] 22+ messages in thread* Re: [PATCH v5 10/11] block: use int64_t instead of int in driver discard handlers
2021-06-07 18:13 ` Eric Blake
@ 2021-06-08 8:38 ` Vladimir Sementsov-Ogievskiy
0 siblings, 0 replies; 22+ messages in thread
From: Vladimir Sementsov-Ogievskiy @ 2021-06-08 8:38 UTC (permalink / raw)
To: Eric Blake
Cc: qemu-block, qemu-devel, stefanha, kwolf, mreitz, John Snow,
Ari Sundholm, Pavel Dovgalyuk, Paolo Bonzini, Ronnie Sahlberg,
Peter Lieven, Fam Zheng, Liu Yuan, open list:GLUSTER
07.06.2021 21:13, Eric Blake wrote:
> On Wed, May 05, 2021 at 10:50:00AM +0300, Vladimir Sementsov-Ogievskiy wrote:
>> We are generally moving to int64_t for both offset and bytes parameters
>> on all io paths.
>>
>> Main motivation is realization of 64-bit write_zeroes operation for
>> fast zeroing large disk chunks, up to the whole disk.
>>
>> We chose signed type, to be consistent with off_t (which is signed) and
>> with possibility for signed return type (where negative value means
>> error).
>>
>> So, convert driver discard handlers bytes parameter to int64_t.
>>
>> The only caller of all updated function is bdrv_co_pdiscard in
>> block/io.c. It is already prepared to work with 64bit requests, but
>> pass at most max(bs->bl.max_pdiscard, INT_MAX) to the driver.
>>
>> Let's look at all updated functions:
>>
>> backup-top: pass to bdrv_co_pdiscard which is 64bit
>
> and to backup_top_cbw, but that is also 64-bit
>
>>
>> blkdebug: all calculations are still OK, thanks to
>> bdrv_check_qiov_request().
>> both rule_check and bdrv_co_pdiscard are 64bit
>>
>> blklogwrites: pass to blk_loc_writes_co_log which is 64bit
>>
>> blkreply, copy-on-read, filter-compress: pass to bdrv_co_pdiscard, OK
>
> blkreplay
>
>>
>> file-posix: one handler calls raw_account_discard() is 64bit and both
>> handlers calls raw_do_pdiscard(). Update raw_do_pdiscard, which pass
>> to RawPosixAIOData::aio_nbytes, which is 64bit (and calls
>> raw_account_discard())
>>
>> gluster: somehow, third argument of glfs_discard_async is size_t.
>> Let's set max_pdiscard accordingly.
>>
>> iscsi: iscsi_allocmap_set_invalid is 64bit,
>> !is_byte_request_lun_aligned is 64bit.
>> list.num is uint32_t. Let's clarify max_pdiscard and
>> pdiscard_alignment.
>
> The patch tweaks max_pdiscard, but doesn't change pdiscard_alignment.
>
>>
>> mirror_top, preallocate: pass to bdrv_mirror_top_do_write() which is
>> 64bit
>
> file is mirror.c, not mirror-top.c. But it matches the BlockDriver
> bdrv_mirror_top name. preallocate does not call
> bdrv_mirror_top_do_write, so it's probably worth separating that line
> out.
>
>>
>> nbd: protocol limitation. max_pdiscard is alredy set strict enough,
>> keep it as is for now.
>>
>> nvmd: buf.nlb is uint32_t and we do shift. So, add corresponding limits
>> to nvme_refresh_limits().
>
> nvme
>
>>
>> qcow2: calculations are still OK, thanks to bdrv_check_qiov_request(),
>> qcow2_cluster_discard() is 64bit.
>>
>> raw-format: raw_adjust_offset() is 64bit, bdrv_co_pdiscard too.
>>
>> sheepdog: the format is deprecated. Don't care and just make old
>> INT_MAX limit to be explicit
>>
>> throttle: pass to bdrv_co_pdiscard() which is 64bit and to
>> throttle_group_co_io_limits_intercept() which is 64bit as well.
>>
>> test-block-iothread: bytes argument is unused
>>
>> Great! Now all drivers are prepared to 64bit discard requests or has
>> explicit max_pdiscard limit.
>
> are prepared to handle 64-bit discard requests, or else have explicit
> max_pdiscard limits.
>
>>
>> Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
>> ---
>> include/block/block_int.h | 2 +-
>> block/backup-top.c | 2 +-
>> block/blkdebug.c | 2 +-
>> block/blklogwrites.c | 4 ++--
>> block/blkreplay.c | 2 +-
>> block/copy-on-read.c | 2 +-
>> block/file-posix.c | 7 ++++---
>> block/filter-compress.c | 2 +-
>> block/gluster.c | 7 +++++--
>> block/iscsi.c | 10 +++++-----
>> block/mirror.c | 2 +-
>> block/nbd.c | 6 ++++--
>> block/nvme.c | 14 +++++++++++++-
>> block/preallocate.c | 2 +-
>> block/qcow2.c | 2 +-
>> block/raw-format.c | 2 +-
>> block/sheepdog.c | 15 ++++++++++++++-
>> block/throttle.c | 2 +-
>> tests/unit/test-block-iothread.c | 2 +-
>> block/trace-events | 4 ++--
>> 20 files changed, 61 insertions(+), 30 deletions(-)
>>
>
>> +++ b/block/gluster.c
>> @@ -891,6 +891,7 @@ out:
>> static void qemu_gluster_refresh_limits(BlockDriverState *bs, Error **errp)
>> {
>> bs->bl.max_transfer = GLUSTER_MAX_TRANSFER;
>> + bs->bl.max_pdiscard = SIZE_MAX;
>
> We probably want this to be MIN(GLUSTER_MAX_TRANSFER, SIZE_MAX). Also,
> do we want to round it down to alignment boundaries?
I don't think so.. We just call glfs_discard_async() function which is not part of Qemu. So we shouldn't assume any extra restrictions except for argument types I think. byte is size_t, so maximum is SIZE_MAX.
>
>> +++ b/block/iscsi.c
>> @@ -1141,7 +1141,8 @@ iscsi_getlength(BlockDriverState *bs)
>> }
>>
>> static int
>> -coroutine_fn iscsi_co_pdiscard(BlockDriverState *bs, int64_t offset, int bytes)
>> +coroutine_fn iscsi_co_pdiscard(BlockDriverState *bs, int64_t offset,
>> + int64_t bytes)
>> {
>> IscsiLun *iscsilun = bs->opaque;
>> struct IscsiTask iTask;
>
> Did you want to add some sort of assert(bytes / iscsilun->block_size
> <= UINT32_MAX), or a comment that we are relying on bl.max_pdiscard?
Yes, will add, we are storing it to list.num which is uint32_t and don't want it to be overflowed
>
>> +++ b/block/sheepdog.c
>
>> +static void sd_refresh_limits(BlockDriverState *bs, Error **errp)
>> +{
>> + bs->bl.max_pdiscard = INT_MAX;
>
> Do we want to round this down to alignment?
>
anyway, block/sheepdog.c is absent now :)
--
Best regards,
Vladimir
^ permalink raw reply [flat|nested] 22+ messages in thread
* [PATCH v5 11/11] block/io: allow 64bit discard requests
2021-05-05 7:49 [PATCH v5 00/11] 64bit block-layer: part II Vladimir Sementsov-Ogievskiy
` (9 preceding siblings ...)
2021-05-05 7:50 ` [PATCH v5 10/11] block: use int64_t instead of int in driver discard handlers Vladimir Sementsov-Ogievskiy
@ 2021-05-05 7:50 ` Vladimir Sementsov-Ogievskiy
2021-06-07 18:15 ` Eric Blake
2021-05-05 8:06 ` [PATCH v5 00/11] 64bit block-layer: part II no-reply
2021-06-04 18:30 ` Eric Blake
12 siblings, 1 reply; 22+ messages in thread
From: Vladimir Sementsov-Ogievskiy @ 2021-05-05 7:50 UTC (permalink / raw)
To: qemu-block
Cc: qemu-devel, eblake, stefanha, kwolf, mreitz, vsementsov, Fam Zheng
Now, when all drivers are updated by previous commit, we can drop the
last limiter on pdiscard path: INT_MAX in bdrv_co_pdiscard().
Now everything is prepared for implementing incredibly cool and fast
big-discard requests in NBD and qcow2. And any other driver which wants
it of course.
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
---
block/io.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/block/io.c b/block/io.c
index a7edb1ef54..e0b3ebcc37 100644
--- a/block/io.c
+++ b/block/io.c
@@ -3036,7 +3036,7 @@ int coroutine_fn bdrv_co_pdiscard(BdrvChild *child, int64_t offset,
goto out;
}
- max_pdiscard = QEMU_ALIGN_DOWN(MIN_NON_ZERO(bs->bl.max_pdiscard, INT_MAX),
+ max_pdiscard = QEMU_ALIGN_DOWN(MIN_NON_ZERO(bs->bl.max_pdiscard, INT64_MAX),
align);
assert(max_pdiscard >= bs->bl.request_alignment);
--
2.29.2
^ permalink raw reply related [flat|nested] 22+ messages in thread* Re: [PATCH v5 11/11] block/io: allow 64bit discard requests
2021-05-05 7:50 ` [PATCH v5 11/11] block/io: allow 64bit discard requests Vladimir Sementsov-Ogievskiy
@ 2021-06-07 18:15 ` Eric Blake
0 siblings, 0 replies; 22+ messages in thread
From: Eric Blake @ 2021-06-07 18:15 UTC (permalink / raw)
To: Vladimir Sementsov-Ogievskiy
Cc: kwolf, Fam Zheng, qemu-block, qemu-devel, mreitz, stefanha
On Wed, May 05, 2021 at 10:50:01AM +0300, Vladimir Sementsov-Ogievskiy wrote:
> Now, when all drivers are updated by previous commit, we can drop the
Now that all drivers are updated by the previous commit,
> last limiter on pdiscard path: INT_MAX in bdrv_co_pdiscard().
>
> Now everything is prepared for implementing incredibly cool and fast
> big-discard requests in NBD and qcow2. And any other driver which wants
> it of course.
>
> Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
> ---
> block/io.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
Reviewed-by: Eric Blake <eblake@redhat.com>
--
Eric Blake, Principal Software Engineer
Red Hat, Inc. +1-919-301-3266
Virtualization: qemu.org | libvirt.org
^ permalink raw reply [flat|nested] 22+ messages in thread
* Re: [PATCH v5 00/11] 64bit block-layer: part II
2021-05-05 7:49 [PATCH v5 00/11] 64bit block-layer: part II Vladimir Sementsov-Ogievskiy
` (10 preceding siblings ...)
2021-05-05 7:50 ` [PATCH v5 11/11] block/io: allow 64bit discard requests Vladimir Sementsov-Ogievskiy
@ 2021-05-05 8:06 ` no-reply
2021-05-05 8:10 ` Vladimir Sementsov-Ogievskiy
2021-06-04 18:30 ` Eric Blake
12 siblings, 1 reply; 22+ messages in thread
From: no-reply @ 2021-05-05 8:06 UTC (permalink / raw)
To: vsementsov
Cc: kwolf, fam, vsementsov, berto, pavel.dovgaluk, qemu-block,
dillaman, jsnow, pl, qemu-devel, mreitz, integration, stefanha,
sw, pbonzini, namei.unix, ari, ronniesahlberg
Patchew URL: https://patchew.org/QEMU/20210505075001.45041-1-vsementsov@virtuozzo.com/
Hi,
This series seems to have some coding style problems. See output below for
more information:
Type: series
Message-id: 20210505075001.45041-1-vsementsov@virtuozzo.com
Subject: [PATCH v5 00/11] 64bit block-layer: part II
=== TEST SCRIPT BEGIN ===
#!/bin/bash
git rev-parse base > /dev/null || exit 0
git config --local diff.renamelimit 0
git config --local diff.renames True
git config --local diff.algorithm histogram
./scripts/checkpatch.pl --mailback base..
=== TEST SCRIPT END ===
Updating 3c8cf5a9c21ff8782164d1def7f44bd888713384
From https://github.com/patchew-project/qemu
- [tag update] patchew/20210505045824.33880-1-liq3ea@163.com -> patchew/20210505045824.33880-1-liq3ea@163.com
* [new tag] patchew/20210505075001.45041-1-vsementsov@virtuozzo.com -> patchew/20210505075001.45041-1-vsementsov@virtuozzo.com
Switched to a new branch 'test'
3700aaf block/io: allow 64bit discard requests
54ba548 block: use int64_t instead of int in driver discard handlers
7a3aaa5 block: make BlockLimits::max_pdiscard 64bit
f80faf7 block/io: allow 64bit write-zeroes requests
4cc3310 block: use int64_t instead of int in driver write_zeroes handlers
136dd63 block: make BlockLimits::max_pwrite_zeroes 64bit
03a7c45 block: use int64_t instead of uint64_t in copy_range driver handlers
496fe8b block: use int64_t instead of uint64_t in driver write handlers
eefb31d block: use int64_t instead of uint64_t in driver read handlers
fb7a119 qcow2: check request on vmstate save/load path
23ba0f4 block/io: bring request check to bdrv_co_(read, write)v_vmstate
=== OUTPUT BEGIN ===
1/11 Checking commit 23ba0f4a09c1 (block/io: bring request check to bdrv_co_(read, write)v_vmstate)
ERROR: Author email address is mangled by the mailing list
#2:
Author: Vladimir Sementsov-Ogievskiy via <qemu-devel@nongnu.org>
total: 1 errors, 0 warnings, 42 lines checked
Patch 1/11 has style problems, please review. If any of these errors
are false positives report them to the maintainer, see
CHECKPATCH in MAINTAINERS.
2/11 Checking commit fb7a119cd9aa (qcow2: check request on vmstate save/load path)
3/11 Checking commit eefb31d480b4 (block: use int64_t instead of uint64_t in driver read handlers)
4/11 Checking commit 496fe8b2e7ce (block: use int64_t instead of uint64_t in driver write handlers)
5/11 Checking commit 03a7c4534a58 (block: use int64_t instead of uint64_t in copy_range driver handlers)
6/11 Checking commit 136dd63cc723 (block: make BlockLimits::max_pwrite_zeroes 64bit)
7/11 Checking commit 4cc3310d243e (block: use int64_t instead of int in driver write_zeroes handlers)
8/11 Checking commit f80faf73a84a (block/io: allow 64bit write-zeroes requests)
9/11 Checking commit 7a3aaa587314 (block: make BlockLimits::max_pdiscard 64bit)
10/11 Checking commit 54ba54860b4a (block: use int64_t instead of int in driver discard handlers)
11/11 Checking commit 3700aafec1ff (block/io: allow 64bit discard requests)
=== OUTPUT END ===
Test command exited with code: 1
The full log is available at
http://patchew.org/logs/20210505075001.45041-1-vsementsov@virtuozzo.com/testing.checkpatch/?type=message.
---
Email generated automatically by Patchew [https://patchew.org/].
Please send your feedback to patchew-devel@redhat.com
^ permalink raw reply [flat|nested] 22+ messages in thread* Re: [PATCH v5 00/11] 64bit block-layer: part II
2021-05-05 8:06 ` [PATCH v5 00/11] 64bit block-layer: part II no-reply
@ 2021-05-05 8:10 ` Vladimir Sementsov-Ogievskiy
0 siblings, 0 replies; 22+ messages in thread
From: Vladimir Sementsov-Ogievskiy @ 2021-05-05 8:10 UTC (permalink / raw)
To: qemu-devel
Cc: qemu-block, eblake, stefanha, kwolf, mreitz, jsnow, ari,
pavel.dovgaluk, pbonzini, sw, fam, ronniesahlberg, pl, berto,
dillaman, namei.unix, integration
05.05.2021 11:06, no-reply@patchew.org wrote:
> Patchew URL: https://patchew.org/QEMU/20210505075001.45041-1-vsementsov@virtuozzo.com/
>
>
>
> Hi,
>
> This series seems to have some coding style problems. See output below for
> more information:
>
> Type: series
> Message-id: 20210505075001.45041-1-vsementsov@virtuozzo.com
> Subject: [PATCH v5 00/11] 64bit block-layer: part II
>
> === TEST SCRIPT BEGIN ===
> #!/bin/bash
> git rev-parse base > /dev/null || exit 0
> git config --local diff.renamelimit 0
> git config --local diff.renames True
> git config --local diff.algorithm histogram
> ./scripts/checkpatch.pl --mailback base..
> === TEST SCRIPT END ===
>
> Updating 3c8cf5a9c21ff8782164d1def7f44bd888713384
> From https://github.com/patchew-project/qemu
> - [tag update] patchew/20210505045824.33880-1-liq3ea@163.com -> patchew/20210505045824.33880-1-liq3ea@163.com
> * [new tag] patchew/20210505075001.45041-1-vsementsov@virtuozzo.com -> patchew/20210505075001.45041-1-vsementsov@virtuozzo.com
> Switched to a new branch 'test'
> 3700aaf block/io: allow 64bit discard requests
> 54ba548 block: use int64_t instead of int in driver discard handlers
> 7a3aaa5 block: make BlockLimits::max_pdiscard 64bit
> f80faf7 block/io: allow 64bit write-zeroes requests
> 4cc3310 block: use int64_t instead of int in driver write_zeroes handlers
> 136dd63 block: make BlockLimits::max_pwrite_zeroes 64bit
> 03a7c45 block: use int64_t instead of uint64_t in copy_range driver handlers
> 496fe8b block: use int64_t instead of uint64_t in driver write handlers
> eefb31d block: use int64_t instead of uint64_t in driver read handlers
> fb7a119 qcow2: check request on vmstate save/load path
> 23ba0f4 block/io: bring request check to bdrv_co_(read, write)v_vmstate
>
> === OUTPUT BEGIN ===
> 1/11 Checking commit 23ba0f4a09c1 (block/io: bring request check to bdrv_co_(read, write)v_vmstate)
> ERROR: Author email address is mangled by the mailing list
> #2:
> Author: Vladimir Sementsov-Ogievskiy via <qemu-devel@nongnu.org>
>
> total: 1 errors, 0 warnings, 42 lines checked
>
> Patch 1/11 has style problems, please review. If any of these errors
> are false positives report them to the maintainer, see
> CHECKPATCH in MAINTAINERS.
So, s/{}/()/ doesn't help.
>
> 2/11 Checking commit fb7a119cd9aa (qcow2: check request on vmstate save/load path)
> 3/11 Checking commit eefb31d480b4 (block: use int64_t instead of uint64_t in driver read handlers)
> 4/11 Checking commit 496fe8b2e7ce (block: use int64_t instead of uint64_t in driver write handlers)
> 5/11 Checking commit 03a7c4534a58 (block: use int64_t instead of uint64_t in copy_range driver handlers)
> 6/11 Checking commit 136dd63cc723 (block: make BlockLimits::max_pwrite_zeroes 64bit)
> 7/11 Checking commit 4cc3310d243e (block: use int64_t instead of int in driver write_zeroes handlers)
> 8/11 Checking commit f80faf73a84a (block/io: allow 64bit write-zeroes requests)
> 9/11 Checking commit 7a3aaa587314 (block: make BlockLimits::max_pdiscard 64bit)
> 10/11 Checking commit 54ba54860b4a (block: use int64_t instead of int in driver discard handlers)
> 11/11 Checking commit 3700aafec1ff (block/io: allow 64bit discard requests)
> === OUTPUT END ===
>
> Test command exited with code: 1
>
>
> The full log is available at
> http://patchew.org/logs/20210505075001.45041-1-vsementsov@virtuozzo.com/testing.checkpatch/?type=message.
> ---
> Email generated automatically by Patchew [https://patchew.org/].
> Please send your feedback to patchew-devel@redhat.com
>
--
Best regards,
Vladimir
^ permalink raw reply [flat|nested] 22+ messages in thread
* Re: [PATCH v5 00/11] 64bit block-layer: part II
2021-05-05 7:49 [PATCH v5 00/11] 64bit block-layer: part II Vladimir Sementsov-Ogievskiy
` (11 preceding siblings ...)
2021-05-05 8:06 ` [PATCH v5 00/11] 64bit block-layer: part II no-reply
@ 2021-06-04 18:30 ` Eric Blake
12 siblings, 0 replies; 22+ messages in thread
From: Eric Blake @ 2021-06-04 18:30 UTC (permalink / raw)
To: Vladimir Sementsov-Ogievskiy
Cc: kwolf, Fam Zheng, integration, Alberto Garcia, Pavel Dovgalyuk,
qemu-block, Jason Dillaman, Stefan Weil, Peter Lieven,
qemu-devel, mreitz, stefanha, Liu Yuan, Paolo Bonzini, John Snow,
Ari Sundholm, Ronnie Sahlberg
On Wed, May 05, 2021 at 10:49:50AM +0300, Vladimir Sementsov-Ogievskiy wrote:
> Hi all!
>
> v5: rebase on master, fix block comments style and over-80 line.
> 01: s/{}/()/ in subject, so that email not to be mangled.
Don't worry too much about that; if it happens again on v6, I can
manually fix the commit on my side or else pull the commit directly
from your repo (if you provide a link) rather than via 'git am'
through the mailing list.
>
> part II aims to update block drivers to int64_t.
>
> I remind that main aim of this update of the whole block-layer to 64bit
> is to implement 64bit write-zeroes NBD request.
>
> Vladimir Sementsov-Ogievskiy (11):
I got through patches 1-6 in your v4 posting (our mails crossed), so
I'll assume those are similar, and resume my review with patch 7 in
this posting.
--
Eric Blake, Principal Software Engineer
Red Hat, Inc. +1-919-301-3266
Virtualization: qemu.org | libvirt.org
^ permalink raw reply [flat|nested] 22+ messages in thread