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block: Mark bdrv_parent_perms_conflict() and callers GRAPH_RDLOCK

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The function reads the parents list, so it needs to hold the graph lock.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-ID: <20230911094620.45040-14-kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Kevin Wolf 2023-09-11 11:46:12 +02:00
parent afdaeb9ea0
commit 3804e3cf54
9 changed files with 66 additions and 26 deletions
Download patch file Download diff file Expand all files Collapse all files

6
include/block/block_int-common.h
View file

@ -311,7 +311,7 @@ struct BlockDriver {
*/
void (*bdrv_cancel_in_flight)(BlockDriverState *bs);
int (*bdrv_inactivate)(BlockDriverState *bs);
int GRAPH_RDLOCK_PTR (*bdrv_inactivate)(BlockDriverState *bs);
int (*bdrv_snapshot_create)(BlockDriverState *bs,
QEMUSnapshotInfo *sn_info);
@ -944,8 +944,8 @@ struct BdrvChildClass {
* when migration is completing) and it can start/stop requesting
* permissions and doing I/O on it.
*/
void (*activate)(BdrvChild *child, Error **errp);
int (*inactivate)(BdrvChild *child);
void GRAPH_RDLOCK_PTR (*activate)(BdrvChild *child, Error **errp);
int GRAPH_RDLOCK_PTR (*inactivate)(BdrvChild *child);
void GRAPH_WRLOCK_PTR (*attach)(BdrvChild *child);
void GRAPH_WRLOCK_PTR (*detach)(BdrvChild *child);

8
include/block/block_int-global-state.h
View file

@ -212,8 +212,9 @@ void bdrv_get_cumulative_perm(BlockDriverState *bs, uint64_t *perm,
* bdrv_child_refresh_perms() instead and make the parent's
* .bdrv_child_perm() implementation return the correct values.
*/
int bdrv_child_try_set_perm(BdrvChild *c, uint64_t perm, uint64_t shared,
Error **errp);
int GRAPH_RDLOCK
bdrv_child_try_set_perm(BdrvChild *c, uint64_t perm, uint64_t shared,
Error **errp);
/**
* Calls bs->drv->bdrv_child_perm() and updates the child's permission
@ -223,7 +224,8 @@ int bdrv_child_try_set_perm(BdrvChild *c, uint64_t perm, uint64_t shared,
* values than before, but which will not result in the block layer
* automatically refreshing the permissions.
*/
int bdrv_child_refresh_perms(BlockDriverState *bs, BdrvChild *c, Error **errp);
int GRAPH_RDLOCK
bdrv_child_refresh_perms(BlockDriverState *bs, BdrvChild *c, Error **errp);
bool GRAPH_RDLOCK bdrv_recurse_can_replace(BlockDriverState *bs,
BlockDriverState *to_replace);

4
include/sysemu/block-backend-global-state.h
View file

@ -61,8 +61,8 @@ int blk_insert_bs(BlockBackend *blk, BlockDriverState *bs, Error **errp);
int blk_replace_bs(BlockBackend *blk, BlockDriverState *new_bs, Error **errp);
bool bdrv_has_blk(BlockDriverState *bs);
bool bdrv_is_root_node(BlockDriverState *bs);
int blk_set_perm(BlockBackend *blk, uint64_t perm, uint64_t shared_perm,
Error **errp);
int GRAPH_UNLOCKED blk_set_perm(BlockBackend *blk, uint64_t perm,
uint64_t shared_perm, Error **errp);
void blk_get_perm(BlockBackend *blk, uint64_t *perm, uint64_t *shared_perm);
void blk_iostatus_enable(BlockBackend *blk);