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authorKevin Wolf <kwolf@redhat.com>2023-10-27 17:53:27 +0200
committerKevin Wolf <kwolf@redhat.com>2023-11-08 17:56:17 +0100
commit244b26d259bc56097b2d82690847cb7657e22830 (patch)
tree0471f52374e62ed91513436df99ebcb2fba458b6 /block/blkverify.c
parent004915a96a7a40e942ac85e6d22518cbcd283506 (diff)
blkverify: Add locking for request_fn
This is either bdrv_co_preadv() or bdrv_co_pwritev() which both need to have the graph locked. Annotate the function pointer accordingly and add locking to its callers. This shouldn't actually have resulted in a bug because the graph lock is already held by blkverify_co_prwv(), which waits for the coroutines to terminate. Annotate with GRAPH_RDLOCK as well to make this clearer. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Message-ID: <20231027155333.420094-19-kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'block/blkverify.c')
-rw-r--r--block/blkverify.c16
1 files changed, 11 insertions, 5 deletions
diff --git a/block/blkverify.c b/block/blkverify.c
index dae9716a26..9ea2cb4cc5 100644
--- a/block/blkverify.c
+++ b/block/blkverify.c
@@ -33,8 +33,8 @@ typedef struct BlkverifyRequest {
uint64_t bytes;
int flags;
- int (*request_fn)(BdrvChild *, int64_t, int64_t, QEMUIOVector *,
- BdrvRequestFlags);
+ int GRAPH_RDLOCK_PTR (*request_fn)(
+ BdrvChild *, int64_t, int64_t, QEMUIOVector *, BdrvRequestFlags);
int ret; /* test image result */
int raw_ret; /* raw image result */
@@ -170,8 +170,11 @@ static void coroutine_fn blkverify_do_test_req(void *opaque)
BlkverifyRequest *r = opaque;
BDRVBlkverifyState *s = r->bs->opaque;
+ bdrv_graph_co_rdlock();
r->ret = r->request_fn(s->test_file, r->offset, r->bytes, r->qiov,
r->flags);
+ bdrv_graph_co_rdunlock();
+
r->done++;
qemu_coroutine_enter_if_inactive(r->co);
}
@@ -180,13 +183,16 @@ static void coroutine_fn blkverify_do_raw_req(void *opaque)
{
BlkverifyRequest *r = opaque;
+ bdrv_graph_co_rdlock();
r->raw_ret = r->request_fn(r->bs->file, r->offset, r->bytes, r->raw_qiov,
r->flags);
+ bdrv_graph_co_rdunlock();
+
r->done++;
qemu_coroutine_enter_if_inactive(r->co);
}
-static int coroutine_fn
+static int coroutine_fn GRAPH_RDLOCK
blkverify_co_prwv(BlockDriverState *bs, BlkverifyRequest *r, uint64_t offset,
uint64_t bytes, QEMUIOVector *qiov, QEMUIOVector *raw_qiov,
int flags, bool is_write)
@@ -222,7 +228,7 @@ blkverify_co_prwv(BlockDriverState *bs, BlkverifyRequest *r, uint64_t offset,
return r->ret;
}
-static int coroutine_fn
+static int coroutine_fn GRAPH_RDLOCK
blkverify_co_preadv(BlockDriverState *bs, int64_t offset, int64_t bytes,
QEMUIOVector *qiov, BdrvRequestFlags flags)
{
@@ -251,7 +257,7 @@ blkverify_co_preadv(BlockDriverState *bs, int64_t offset, int64_t bytes,
return ret;
}
-static int coroutine_fn
+static int coroutine_fn GRAPH_RDLOCK
blkverify_co_pwritev(BlockDriverState *bs, int64_t offset, int64_t bytes,
QEMUIOVector *qiov, BdrvRequestFlags flags)
{