diff options
| -rw-r--r-- | block.c | 17 | ||||
| -rw-r--r-- | include/block/block.h | 1 |
2 files changed, 18 insertions, 0 deletions
@@ -667,6 +667,23 @@ int bdrv_parse_cache_flags(const char *mode, int *flags) return 0; } +int bdrv_parse_cache_mode(const char *mode, int *flags, bool *writethrough) +{ + int ret = bdrv_parse_cache_flags(mode, flags); + if (ret < 0) { + return ret; + } + + if (*flags & BDRV_O_CACHE_WB) { + *flags &= ~BDRV_O_CACHE_WB; + *writethrough = false; + } else { + *writethrough = true; + } + + return 0; +} + /* * Returns the options and flags that a temporary snapshot should get, based on * the originally requested flags (the originally requested image will have diff --git a/include/block/block.h b/include/block/block.h index b4b4650fd3..4fd6c050f0 100644 --- a/include/block/block.h +++ b/include/block/block.h @@ -208,6 +208,7 @@ void bdrv_replace_in_backing_chain(BlockDriverState *old, BlockDriverState *new); int bdrv_parse_cache_flags(const char *mode, int *flags); +int bdrv_parse_cache_mode(const char *mode, int *flags, bool *writethrough); int bdrv_parse_discard_flags(const char *mode, int *flags); BdrvChild *bdrv_open_child(const char *filename, QDict *options, const char *bdref_key, |