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author | BenoƮt Canet <benoit.canet@gmail.com> | 2012-08-02 10:22:47 +0200 |
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committer | Luiz Capitulino <lcapitulino@redhat.com> | 2012-08-03 10:10:38 -0300 |
commit | f198fd1c9aedaae2fa78eb94e236e95ce4f2aedd (patch) | |
tree | 3511fe358de0c41a09d8105cb3c5a39375f0568f | |
parent | e0d45df7a5794b6821d2f8893a7f343109debab9 (diff) | |
download | hqemu-f198fd1c9aedaae2fa78eb94e236e95ce4f2aedd.zip hqemu-f198fd1c9aedaae2fa78eb94e236e95ce4f2aedd.tar.gz |
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: Benoit Canet <benoit@irqsave.net>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
-rw-r--r-- | block.c | 13 | ||||
-rw-r--r-- | block.h | 1 |
2 files changed, 14 insertions, 0 deletions
@@ -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) @@ -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); |