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[Qemu-devel] [PATCH v2 02/16] block: make bdrv_set_enable_write_cache()
From: |
Jeff Cody |
Subject: |
[Qemu-devel] [PATCH v2 02/16] block: make bdrv_set_enable_write_cache() modify open_flags |
Date: |
Thu, 13 Sep 2012 11:49:40 -0400 |
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 <address@hidden>
---
block.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/block.c b/block.c
index c3eb585..2b96c8e 100644
--- a/block.c
+++ b/block.c
@@ -2164,6 +2164,13 @@ int bdrv_enable_write_cache(BlockDriverState *bs)
void bdrv_set_enable_write_cache(BlockDriverState *bs, bool 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)
--
1.7.11.4