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block: Mark preadv_snapshot/snapshot_block_status GRAPH_RDLOCK

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Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20230203152202.49054-16-kwolf@redhat.com>
Reviewed-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Kevin Wolf 2023-02-03 16:21:54 +01:00
parent 742bf09b20
commit 7b9e8b22bc
5 changed files with 17 additions and 15 deletions
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6
block/copy-before-write.c
View File

@ -256,7 +256,7 @@ cbw_snapshot_read_unlock(BlockDriverState *bs, BlockReq *req)
g_free(req);
}
static coroutine_fn int
static int coroutine_fn GRAPH_RDLOCK
cbw_co_preadv_snapshot(BlockDriverState *bs, int64_t offset, int64_t bytes,
QEMUIOVector *qiov, size_t qiov_offset)
{
@ -264,8 +264,6 @@ cbw_co_preadv_snapshot(BlockDriverState *bs, int64_t offset, int64_t bytes,
BdrvChild *file;
int ret;
assume_graph_lock(); /* FIXME */
/* TODO: upgrade to async loop using AioTask */
while (bytes) {
int64_t cur_bytes;
@ -290,7 +288,7 @@ cbw_co_preadv_snapshot(BlockDriverState *bs, int64_t offset, int64_t bytes,
return 0;
}
static int coroutine_fn
static int coroutine_fn GRAPH_RDLOCK
cbw_co_snapshot_block_status(BlockDriverState *bs,
bool want_zero, int64_t offset, int64_t bytes,
int64_t *pnum, int64_t *map,

2
block/io.c
View File

@ -3532,6 +3532,7 @@ bdrv_co_preadv_snapshot(BdrvChild *child, int64_t offset, int64_t bytes,
BlockDriver *drv = bs->drv;
int ret;
IO_CODE();
assert_bdrv_graph_readable();
if (!drv) {
return -ENOMEDIUM;
@ -3557,6 +3558,7 @@ bdrv_co_snapshot_block_status(BlockDriverState *bs,
BlockDriver *drv = bs->drv;
int ret;
IO_CODE();
assert_bdrv_graph_readable();
if (!drv) {
return -ENOMEDIUM;

4
block/snapshot-access.c
View File

@ -26,7 +26,7 @@
#include "qemu/cutils.h"
#include "block/block_int.h"
static coroutine_fn int
static int coroutine_fn GRAPH_RDLOCK
snapshot_access_co_preadv_part(BlockDriverState *bs,
int64_t offset, int64_t bytes,
QEMUIOVector *qiov, size_t qiov_offset,
@ -39,7 +39,7 @@ snapshot_access_co_preadv_part(BlockDriverState *bs,
return bdrv_co_preadv_snapshot(bs->file, offset, bytes, qiov, qiov_offset);
}
static int coroutine_fn
static int coroutine_fn GRAPH_RDLOCK
snapshot_access_co_block_status(BlockDriverState *bs,
bool want_zero, int64_t offset,
int64_t bytes, int64_t *pnum,

12
include/block/block_int-common.h
View File

@ -624,11 +624,13 @@ struct BlockDriver {
* - receive the snapshot's actual length (which may differ from bs's
* length)
*/
int coroutine_fn (*bdrv_co_preadv_snapshot)(BlockDriverState *bs,
int64_t offset, int64_t bytes, QEMUIOVector *qiov, size_t qiov_offset);
int coroutine_fn (*bdrv_co_snapshot_block_status)(BlockDriverState *bs,
bool want_zero, int64_t offset, int64_t bytes, int64_t *pnum,
int64_t *map, BlockDriverState **file);
int coroutine_fn GRAPH_RDLOCK_PTR (*bdrv_co_preadv_snapshot)(
BlockDriverState *bs, int64_t offset, int64_t bytes,
QEMUIOVector *qiov, size_t qiov_offset);
int coroutine_fn GRAPH_RDLOCK_PTR (*bdrv_co_snapshot_block_status)(
BlockDriverState *bs, bool want_zero, int64_t offset, int64_t bytes,
int64_t *pnum, int64_t *map, BlockDriverState **file);
int coroutine_fn GRAPH_RDLOCK_PTR (*bdrv_co_pdiscard_snapshot)(
BlockDriverState *bs, int64_t offset, int64_t bytes);

8
include/block/block_int-io.h
View File

@ -35,11 +35,11 @@
* the I/O API.
*/
int coroutine_fn bdrv_co_preadv_snapshot(BdrvChild *child,
int coroutine_fn GRAPH_RDLOCK bdrv_co_preadv_snapshot(BdrvChild *child,
int64_t offset, int64_t bytes, QEMUIOVector *qiov, size_t qiov_offset);
int coroutine_fn bdrv_co_snapshot_block_status(BlockDriverState *bs,
bool want_zero, int64_t offset, int64_t bytes, int64_t *pnum,
int64_t *map, BlockDriverState **file);
int coroutine_fn GRAPH_RDLOCK bdrv_co_snapshot_block_status(
BlockDriverState *bs, bool want_zero, int64_t offset, int64_t bytes,
int64_t *pnum, int64_t *map, BlockDriverState **file);
int coroutine_fn GRAPH_RDLOCK bdrv_co_pdiscard_snapshot(BlockDriverState *bs,
int64_t offset, int64_t bytes);