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| author | Kevin Wolf <kwolf@redhat.com> | 2023-10-27 17:53:16 +0200 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2023-11-07 19:14:19 +0100 |
| commit | 430da832afb6a6eebb7c1726991c60fb06322d3e (patch) | |
| tree | 0fbd2e3ecd95d23dec87312fecc84fef09b62efc /blockdev.c | |
| parent | 372b69f503d47eb6619a98cac2ab5a6a569e3483 (diff) | |
| download | focaccia-qemu-430da832afb6a6eebb7c1726991c60fb06322d3e.tar.gz focaccia-qemu-430da832afb6a6eebb7c1726991c60fb06322d3e.zip | |
block: Mark bdrv_skip_implicit_filters() and callers GRAPH_RDLOCK
This adds GRAPH_RDLOCK annotations to declare that callers of bdrv_skip_implicit_filters() need to hold a reader lock for the graph because it calls bdrv_filter_child(), which accesses bs->file/backing. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Message-ID: <20231027155333.420094-8-kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'blockdev.c')
| -rw-r--r-- | blockdev.c | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/blockdev.c b/blockdev.c index 4cb8e1d91a..6cdf48beb1 100644 --- a/blockdev.c +++ b/blockdev.c @@ -1746,10 +1746,10 @@ static void drive_backup_action(DriveBackup *backup, assert(format); if (source) { /* Implicit filters should not appear in the filename */ - BlockDriverState *explicit_backing = - bdrv_skip_implicit_filters(source); + BlockDriverState *explicit_backing; bdrv_graph_rdlock_main_loop(); + explicit_backing = bdrv_skip_implicit_filters(source); bdrv_refresh_filename(explicit_backing); bdrv_graph_rdunlock_main_loop(); @@ -3108,16 +3108,18 @@ void qmp_drive_mirror(DriveMirror *arg, Error **errp) bdrv_img_create(arg->target, format, NULL, NULL, NULL, size, flags, false, &local_err); } else { - /* Implicit filters should not appear in the filename */ - BlockDriverState *explicit_backing = - bdrv_skip_implicit_filters(target_backing_bs); + BlockDriverState *explicit_backing; switch (arg->mode) { case NEW_IMAGE_MODE_EXISTING: break; case NEW_IMAGE_MODE_ABSOLUTE_PATHS: - /* create new image with backing file */ + /* + * Create new image with backing file. + * Implicit filters should not appear in the filename. + */ bdrv_graph_rdlock_main_loop(); + explicit_backing = bdrv_skip_implicit_filters(target_backing_bs); bdrv_refresh_filename(explicit_backing); bdrv_graph_rdunlock_main_loop(); |