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[Qemu-devel] [PATCH v2 1/2] vmdk: Fix error for JSON descriptor file nam
From: |
Max Reitz |
Subject: |
[Qemu-devel] [PATCH v2 1/2] vmdk: Fix error for JSON descriptor file names |
Date: |
Wed, 3 Dec 2014 14:57:22 +0100 |
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 <address@hidden>
---
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 591fbe4..239ae5f 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 "<protocol>:" */
-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 2cbfd3e..65413a1 100644
--- a/block/vmdk.c
+++ b/block/vmdk.c
@@ -818,6 +818,14 @@ 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;
@@ -894,7 +902,7 @@ 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 610be9f..919c8f5 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,
--
1.9.3