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block: make bdrv_set_enable_write_cache() modify open_flags 

bdrv_set_enable_write_cache() sets the bs->enable_write_cache flag,
but without the flag recorded in bs->open_flags, then next time
a reopen() is performed the enable_write_cache setting may be
inadvertently lost.

This will set the flag in open_flags, so it is preserved across
reopens.

Signed-off-by: Jeff Cody <jcody@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Jeff Cody 2012-09-20 15:13:18 -04:00 committed by Kevin Wolf
parent be028adced
commit 55b110f24e
1 changed files with 7 additions and 0 deletions
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7
block.c
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@ -2168,6 +2168,13 @@ int bdrv_enable_write_cache(BlockDriverState *bs)
void bdrv_set_enable_write_cache(BlockDriverState *bs, bool wce) void bdrv_set_enable_write_cache(BlockDriverState *bs, bool wce)
{ {
bs->enable_write_cache = wce; bs->enable_write_cache = wce;
/* so a reopen() will preserve wce */
if (wce) {
bs->open_flags |= BDRV_O_CACHE_WB;
} else {
bs->open_flags &= ~BDRV_O_CACHE_WB;
}
} }
int bdrv_is_encrypted(BlockDriverState *bs) int bdrv_is_encrypted(BlockDriverState *bs)