From dc5a137125d6ac641c566f10e68bf6e1fe31bcb5 Mon Sep 17 00:00:00 2001 From: Paolo Bonzini Date: Tue, 8 May 2012 16:51:50 +0200 Subject: qemu-img: make "info" backing file output correct and easier to use qemu-img info should use the same logic as qemu when printing the backing file path, or debugging becomes quite tricky. We can also simplify the output in case the backing file has an absolute path or a protocol. Signed-off-by: Paolo Bonzini Signed-off-by: Kevin Wolf --- block.c | 19 +++++++++++-------- block.h | 2 ++ qemu-img.c | 12 +++++++----- 3 files changed, 20 insertions(+), 13 deletions(-) diff --git a/block.c b/block.c index 2986998..af2ab4f 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 f163e54..7408acc 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 0ae543c..5434ddc 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); -- cgit v1.1