Commit baf5602e authored by Kevin Wolf's avatar Kevin Wolf
Browse files

block: Add bdrv_parse_cache_mode() 



It's like bdrv_parse_cache_flags(), except that writethrough mode isn't
included in the flags, but returned as a separate bool.

Signed-off-by: default avatarKevin Wolf <kwolf@redhat.com>
Reviewed-by: default avatarMax Reitz <mreitz@redhat.com>
parent 63785678

block.c

+17 −0
Original line number Diff line number Diff line
@@ -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

include/block/block.h

+1 −0
Original line number Diff line number Diff line
@@ -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,