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block/qapi: always report full_backing_filename

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Always report full_backing_filename, even if it's the same as
backing_filename. In the next patch, full_backing_filename may be
omitted if it cannot be generated instead of allowing e.g. drive_query
to abort if it runs into this scenario.

The presence or absence of the "full" field becomes useful information.

Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-id: 1450122916-4706-3-git-send-email-jsnow@redhat.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
This commit is contained in:
John Snow 2015-12-14 14:55:13 -05:00 committed by Max Reitz
parent 548e1ff379
commit 12dcb1c018
2 changed files with 6 additions and 3 deletions
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7
block/qapi.c
View File

@ -251,9 +251,10 @@ void bdrv_query_image_info(BlockDriverState *bs,
return;
}
if (strcmp(backing_filename, backing_filename2) != 0) {
info->full_backing_filename =
g_strdup(backing_filename2);
/* Always report the full_backing_filename if present, even if it's the
* same as backing_filename. That they are same is useful info. */
if (backing_filename2) {
info->full_backing_filename = g_strdup(backing_filename2);
info->has_full_backing_filename = true;
}

2
tests/qemu-iotests/043.out
View File

@ -44,6 +44,7 @@ cluster_size: 65536
"filename": "TEST_DIR/t.IMGFMT",
"cluster-size": 65536,
"format": "IMGFMT",
"full-backing-filename": "TEST_DIR/t.IMGFMT.2.base",
"backing-filename": "TEST_DIR/t.IMGFMT.2.base",
"dirty-flag": false
},
@ -52,6 +53,7 @@ cluster_size: 65536
"filename": "TEST_DIR/t.IMGFMT.2.base",
"cluster-size": 65536,
"format": "IMGFMT",
"full-backing-filename": "TEST_DIR/t.IMGFMT.1.base",
"backing-filename": "TEST_DIR/t.IMGFMT.1.base",
"dirty-flag": false
},