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| author | Kevin Wolf <kwolf@redhat.com> | 2023-10-27 17:53:11 +0200 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2023-11-07 19:14:19 +0100 |
| commit | 067179868ec8cd467d9810143339e882cb60e388 (patch) | |
| tree | 54c38cedf3e8f2433846a664bbd11b01cdaa1895 /block/vhdx.c | |
| parent | 221caadcc5129d3ec5ad9ecfd7374de0f7050316 (diff) | |
| download | qemu-067179868ec8cd467d9810143339e882cb60e388.zip qemu-067179868ec8cd467d9810143339e882cb60e388.tar.gz qemu-067179868ec8cd467d9810143339e882cb60e388.tar.bz2 | |
block: Mark bdrv_has_zero_init() and callers GRAPH_RDLOCK
This adds GRAPH_RDLOCK annotations to declare that callers of
bdrv_has_zero_init() need to hold a reader lock for the graph because
it calls bdrv_filter_bs(), which accesses bs->file/backing.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-ID: <20231027155333.420094-3-kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'block/vhdx.c')
| -rw-r--r-- | block/vhdx.c | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/block/vhdx.c b/block/vhdx.c index a9d0874..e136ba1 100644 --- a/block/vhdx.c +++ b/block/vhdx.c @@ -1695,7 +1695,7 @@ exit: * Fixed images: default state of the BAT is fully populated, with * file offsets and state PAYLOAD_BLOCK_FULLY_PRESENT. */ -static int coroutine_fn +static int coroutine_fn GRAPH_UNLOCKED vhdx_create_bat(BlockBackend *blk, BDRVVHDXState *s, uint64_t image_size, VHDXImageType type, bool use_zero_blocks, uint64_t file_offset, @@ -1708,6 +1708,7 @@ vhdx_create_bat(BlockBackend *blk, BDRVVHDXState *s, uint64_t unused; int block_state; VHDXSectorInfo sinfo; + bool has_zero_init; assert(s->bat == NULL); @@ -1737,9 +1738,13 @@ vhdx_create_bat(BlockBackend *blk, BDRVVHDXState *s, goto exit; } + bdrv_graph_co_rdlock(); + has_zero_init = bdrv_has_zero_init(blk_bs(blk)); + bdrv_graph_co_rdunlock(); + if (type == VHDX_TYPE_FIXED || use_zero_blocks || - bdrv_has_zero_init(blk_bs(blk)) == 0) { + has_zero_init == 0) { /* for a fixed file, the default BAT entry is not zero */ s->bat = g_try_malloc0(length); if (length && s->bat == NULL) { @@ -1782,7 +1787,7 @@ exit: * to create the BAT itself, we will also cause the BAT to be * created. */ -static int coroutine_fn +static int coroutine_fn GRAPH_UNLOCKED vhdx_create_new_region_table(BlockBackend *blk, uint64_t image_size, uint32_t block_size, uint32_t sector_size, uint32_t log_size, bool use_zero_blocks, @@ -2173,7 +2178,7 @@ static int coroutine_fn vhdx_co_check(BlockDriverState *bs, return 0; } -static int vhdx_has_zero_init(BlockDriverState *bs) +static int GRAPH_RDLOCK vhdx_has_zero_init(BlockDriverState *bs) { BDRVVHDXState *s = bs->opaque; int state; |