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[Qemu-devel] [PATCH v4 7/9] block: Assert !bs->refcnt in bdrv_close()
From: |
Max Reitz |
Subject: |
[Qemu-devel] [PATCH v4 7/9] block: Assert !bs->refcnt in bdrv_close() |
Date: |
Tue, 17 May 2016 16:41:32 +0200 |
The only caller of bdrv_close() left is bdrv_delete(). We may as well
assert that, in a way (there are some things in bdrv_close() that make
more sense under that assumption, such as the call to
bdrv_release_all_dirty_bitmaps() which in turn assumes that no frozen
bitmaps are attached to the BDS).
In addition, being called only in bdrv_delete() means that we can drop
bdrv_close()'s forward declaration at the top of block.c.
Signed-off-by: Max Reitz <address@hidden>
Reviewed-by: Alberto Garcia <address@hidden>
Reviewed-by: Kevin Wolf <address@hidden>
---
block.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/block.c b/block.c
index 5693787..7efc61c 100644
--- a/block.c
+++ b/block.c
@@ -74,8 +74,6 @@ static BlockDriverState *bdrv_open_inherit(const char
*filename,
/* If non-zero, use only whitelisted block drivers */
static int use_bdrv_whitelist;
-static void bdrv_close(BlockDriverState *bs);
-
#ifdef _WIN32
static int is_windows_drive_prefix(const char *filename)
{
@@ -2110,6 +2108,7 @@ static void bdrv_close(BlockDriverState *bs)
BdrvAioNotifier *ban, *ban_next;
assert(!bs->job);
+ assert(!bs->refcnt);
bdrv_drained_begin(bs); /* complete I/O */
bdrv_flush(bs);
--
2.8.2
- [Qemu-devel] [PATCH v4 0/9] blockdev: (Nearly) free clean-up work, Max Reitz, 2016/05/17
- [Qemu-devel] [PATCH v4 1/9] block: Drop useless bdrv_new() call, Max Reitz, 2016/05/17
- [Qemu-devel] [PATCH v4 4/9] block: Drop blk_new_with_bs(), Max Reitz, 2016/05/17
- [Qemu-devel] [PATCH v4 2/9] block: Let bdrv_open_inherit() return the snapshot, Max Reitz, 2016/05/17
- [Qemu-devel] [PATCH v4 3/9] tests: Drop BDS from test-throttle.c, Max Reitz, 2016/05/17
- [Qemu-devel] [PATCH v4 5/9] block: Drop bdrv_new_root(), Max Reitz, 2016/05/17
- [Qemu-devel] [PATCH v4 9/9] block: Drop errp parameter from blk_new(), Max Reitz, 2016/05/17
- [Qemu-devel] [PATCH v4 6/9] block: Make bdrv_open() return a BDS, Max Reitz, 2016/05/17
- [Qemu-devel] [PATCH v4 7/9] block: Assert !bs->refcnt in bdrv_close(),
Max Reitz <=
- [Qemu-devel] [PATCH v4 8/9] block: Drop bdrv_parent_cb_...() from bdrv_close(), Max Reitz, 2016/05/17
- Re: [Qemu-devel] [PATCH v4 0/9] blockdev: (Nearly) free clean-up work, Kevin Wolf, 2016/05/23