diff options
| -rw-r--r-- | block.c | 19 | ||||
| -rw-r--r-- | block.h | 2 | ||||
| -rw-r--r-- | qemu-img.c | 12 |
3 files changed, 20 insertions, 13 deletions
diff --git a/block.c b/block.c index 29869987a9..af2ab4f3ea 100644 --- a/block.c +++ b/block.c @@ -270,6 +270,15 @@ void path_combine(char *dest, int dest_size, } } +void bdrv_get_full_backing_filename(BlockDriverState *bs, char *dest, size_t sz) +{ + if (bs->backing_file[0] == '\0' || path_has_protocol(bs->backing_file)) { + pstrcpy(dest, sz, bs->backing_file); + } else { + path_combine(dest, sz, bs->filename, bs->backing_file); + } +} + void bdrv_register(BlockDriver *bdrv) { /* Block drivers without coroutine functions need emulation */ @@ -796,14 +805,8 @@ int bdrv_open(BlockDriverState *bs, const char *filename, int flags, BlockDriver *back_drv = NULL; bs->backing_hd = bdrv_new(""); - - 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); - } + bdrv_get_full_backing_filename(bs, backing_filename, + sizeof(backing_filename)); if (bs->backing_format[0] != '\0') { back_drv = bdrv_find_format(bs->backing_format); diff --git a/block.h b/block.h index f163e54b5f..7408acc5cd 100644 --- a/block.h +++ b/block.h @@ -303,6 +303,8 @@ int bdrv_get_info(BlockDriverState *bs, BlockDriverInfo *bdi); const char *bdrv_get_encrypted_filename(BlockDriverState *bs); void bdrv_get_backing_filename(BlockDriverState *bs, char *filename, int filename_size); +void bdrv_get_full_backing_filename(BlockDriverState *bs, + char *dest, size_t sz); int bdrv_can_snapshot(BlockDriverState *bs); int bdrv_is_snapshot(BlockDriverState *bs); BlockDriverState *bdrv_snapshots(void); diff --git a/qemu-img.c b/qemu-img.c index 0ae543cade..5434ddc5ee 100644 --- a/qemu-img.c +++ b/qemu-img.c @@ -1138,11 +1138,13 @@ static int img_info(int argc, char **argv) } bdrv_get_backing_filename(bs, backing_filename, sizeof(backing_filename)); if (backing_filename[0] != '\0') { - path_combine(backing_filename2, sizeof(backing_filename2), - filename, backing_filename); - printf("backing file: %s (actual path: %s)\n", - backing_filename, - backing_filename2); + bdrv_get_full_backing_filename(bs, backing_filename2, + sizeof(backing_filename2)); + printf("backing file: %s", backing_filename); + if (strcmp(backing_filename, backing_filename2) != 0) { + printf(" (actual path: %s)", backing_filename2); + } + putchar('\n'); } dump_snapshots(bs); bdrv_delete(bs); |