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vmdk: Fix error for JSON descriptor file names

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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 <mreitz@redhat.com>
Reviewed-by: Fam Zheng <famz@redhat.com>
Message-id: 1417615043-26174-2-git-send-email-mreitz@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Max Reitz 2014-12-03 14:57:22 +01:00 • committed by Stefan Hajnoczi
parent ebd9fbd7e1
commit 5c98415b2a
3 changed files with 11 additions and 2 deletions
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1
include/block/block.h
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@ -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,