From 5c98415b2a2fde5739aefe51793f969ce8bb2758 Mon Sep 17 00:00:00 2001 From: Max Reitz Date: Wed, 3 Dec 2014 14:57:22 +0100 Subject: [PATCH] vmdk: Fix error for JSON descriptor file names If vmdk blindly tries to use path_combine() using bs->file->filename as the base file name, this will result in a bad error message for JSON file names when calling bdrv_open(). It is better to only try bs->file->exact_filename; if that is empty, bs->file->filename will be useless for path_combine() and an error should be emitted (containing bs->file->filename because desc_file_path (which is bs->file->exact_filename) is empty). Signed-off-by: Max Reitz Reviewed-by: Fam Zheng Message-id: 1417615043-26174-2-git-send-email-mreitz@redhat.com Signed-off-by: Stefan Hajnoczi --- block.c | 2 +- block/vmdk.c | 10 +++++++++- include/block/block.h | 1 + 3 files changed, 11 insertions(+), 2 deletions(-) diff --git a/block.c b/block.c index 82f33c51b7..a75a99228c 100644 --- a/block.c +++ b/block.c @@ -229,7 +229,7 @@ size_t bdrv_opt_mem_align(BlockDriverState *bs) } /* check if the path starts with ":" */ -static int path_has_protocol(const char *path) +int path_has_protocol(const char *path) { const char *p; diff --git a/block/vmdk.c b/block/vmdk.c index 65af414f3c..bfff900ba6 100644 --- a/block/vmdk.c +++ b/block/vmdk.c @@ -833,6 +833,14 @@ static int vmdk_parse_extents(const char *desc, BlockDriverState *bs, goto next_line; } + if (!path_is_absolute(fname) && !path_has_protocol(fname) && + !desc_file_path[0]) + { + error_setg(errp, "Cannot use relative extent paths with VMDK " + "descriptor file '%s'", bs->file->filename); + return -EINVAL; + } + path_combine(extent_path, sizeof(extent_path), desc_file_path, fname); extent_file = NULL; @@ -909,7 +917,7 @@ static int vmdk_open_desc_file(BlockDriverState *bs, int flags, char *buf, } s->create_type = g_strdup(ct); s->desc_offset = 0; - ret = vmdk_parse_extents(buf, bs, bs->file->filename, errp); + ret = vmdk_parse_extents(buf, bs, bs->file->exact_filename, errp); exit: return ret; } diff --git a/include/block/block.h b/include/block/block.h index 610be9ff04..919c8f50ef 100644 --- a/include/block/block.h +++ b/include/block/block.h @@ -401,6 +401,7 @@ void bdrv_get_full_backing_filename(BlockDriverState *bs, char *dest, size_t sz); int bdrv_is_snapshot(BlockDriverState *bs); +int path_has_protocol(const char *path); int path_is_absolute(const char *path); void path_combine(char *dest, int dest_size, const char *base_path,