Commit f198fd1c authored by Benoît Canet's avatar Benoît Canet Committed by Luiz Capitulino
Browse files

block: create bdrv_get_backing_file_depth() 



Create bdrv_get_backing_file_depth() in order to be able to show
in QMP and HMP how many ancestors backing an image a block device
have.

Signed-off-by: default avatarBenoit Canet <benoit@irqsave.net>
Reviewed-by: default avatarEric Blake <eblake@redhat.com>
Signed-off-by: default avatarLuiz Capitulino <lcapitulino@redhat.com>
parent e0d45df7

block.c

+13 −0
Original line number Diff line number Diff line
@@ -2754,6 +2754,19 @@ BlockDriverState *bdrv_find_backing_image(BlockDriverState *bs, 
    return NULL;

}



int bdrv_get_backing_file_depth(BlockDriverState *bs)

{

    if (!bs->drv) {

        return 0;

    }



    if (!bs->backing_hd) {

        return 0;

    }



    return 1 + bdrv_get_backing_file_depth(bs->backing_hd);

}



#define NB_SUFFIXES 4



char *get_human_readable_size(char *buf, int buf_size, int64_t size)

block.h

+1 −0
Original line number Diff line number Diff line
@@ -174,6 +174,7 @@ int coroutine_fn bdrv_co_is_allocated_above(BlockDriverState *top, 
                                            int nb_sectors, int *pnum);

BlockDriverState *bdrv_find_backing_image(BlockDriverState *bs,

    const char *backing_file);

int bdrv_get_backing_file_depth(BlockDriverState *bs);

int bdrv_truncate(BlockDriverState *bs, int64_t offset);

int64_t bdrv_getlength(BlockDriverState *bs);

int64_t bdrv_get_allocated_file_size(BlockDriverState *bs);