diff options
Diffstat (limited to 'block.c')
| -rw-r--r-- | block.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/block.c b/block.c index 65fce8031a..b4aaf41640 100644 --- a/block.c +++ b/block.c @@ -611,10 +611,18 @@ int bdrv_open(BlockDriverState *bs, const char *filename, int flags, BlockDriver *back_drv = NULL; bs->backing_hd = bdrv_new(""); - path_combine(backing_filename, sizeof(backing_filename), - filename, bs->backing_file); - if (bs->backing_format[0] != '\0') + + if (path_has_protocol(bs->backing_file)) { + pstrcpy(backing_filename, sizeof(backing_filename), + bs->backing_file); + } else { + path_combine(backing_filename, sizeof(backing_filename), + filename, bs->backing_file); + } + + if (bs->backing_format[0] != '\0') { back_drv = bdrv_find_format(bs->backing_format); + } /* backing files always opened read-only */ back_flags = |