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| author | Kevin Wolf <kwolf@redhat.com> | 2016-03-18 17:46:45 +0100 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2016-03-30 12:16:03 +0200 |
| commit | 61de4c680846167e01d7ba42bf787f8d1d80bf5e (patch) | |
| tree | ec4a6353a6f747b6201e5411ad77382ad39f2437 /include | |
| parent | 53e8ae010071637b4317402e2ece9e4dbb329c50 (diff) | |
| download | qemu-61de4c680846167e01d7ba42bf787f8d1d80bf5e.tar.gz qemu-61de4c680846167e01d7ba42bf787f8d1d80bf5e.tar.bz2 qemu-61de4c680846167e01d7ba42bf787f8d1d80bf5e.zip | |
block: Remove BDRV_O_CACHE_WB
The previous patches have successively made blk->enable_write_cache the
true source for the information whether a writethrough mode must be
implemented. The corresponding BDRV_O_CACHE_WB is only useless baggage
we're carrying around, so now's the time to remove it.
At the same time, we remove the 'cache.writeback' option parsing on the
BDS level as the only effect was setting the BDRV_O_CACHE_WB flag.
This change requires test cases that explicitly enabled the option to
drop it. Other than that and the change of the error message when
writethrough is enabled on the BDS level (from "Can't set writethrough
mode" to "doesn't support the option"), there should be no change in
behaviour.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/block/block.h | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/include/block/block.h b/include/block/block.h index 738eeb6ffa..7bacd556b8 100644 --- a/include/block/block.h +++ b/include/block/block.h @@ -82,7 +82,6 @@ typedef struct HDGeometry { #define BDRV_O_SNAPSHOT 0x0008 /* open the file read only and save writes in a snapshot */ #define BDRV_O_TEMPORARY 0x0010 /* delete the file after use */ #define BDRV_O_NOCACHE 0x0020 /* do not use the host page cache */ -#define BDRV_O_CACHE_WB 0x0040 /* use write-back caching */ #define BDRV_O_NATIVE_AIO 0x0080 /* use native AIO instead of the thread pool */ #define BDRV_O_NO_BACKING 0x0100 /* don't open the backing file */ #define BDRV_O_NO_FLUSH 0x0200 /* disable flushing on this disk */ @@ -96,7 +95,7 @@ typedef struct HDGeometry { ignoring the format layer */ #define BDRV_O_NO_IO 0x10000 /* don't initialize for I/O */ -#define BDRV_O_CACHE_MASK (BDRV_O_NOCACHE | BDRV_O_CACHE_WB | BDRV_O_NO_FLUSH) +#define BDRV_O_CACHE_MASK (BDRV_O_NOCACHE | BDRV_O_NO_FLUSH) /* Option names of options parsed by the block layer */ |