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bdrv_query_image_info Error parameter added

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Inform a user in case qcow2_get_specific_info fails to obtain
QCOW2 image specific information. This patch is preliminary to
the one "qcow2: Add list of bitmaps to ImageInfoSpecificQCow2".

Signed-off-by: Andrey Shinkevich <andrey.shinkevich@virtuozzo.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <1549638368-530182-2-git-send-email-andrey.shinkevich@virtuozzo.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
This commit is contained in:
Andrey Shinkevich
2019-02-08 18:06:06 +03:00
committed by Eric Blake
parent 269ee27e99
commit 1bf6e9ca92
8 changed files with 32 additions and 15 deletions
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7
qemu-io-cmds.c
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@@ -1661,6 +1661,7 @@ static int info_f(BlockBackend *blk, int argc, char **argv)
BlockDriverState *bs = blk_bs(blk);
BlockDriverInfo bdi;
ImageInfoSpecific *spec_info;
Error *local_err = NULL;
char s1[64], s2[64];
int ret;
@@ -1682,7 +1683,11 @@ static int info_f(BlockBackend *blk, int argc, char **argv)
printf("cluster size: %s\n", s1);
printf("vm state offset: %s\n", s2);
spec_info = bdrv_get_specific_info(bs);
spec_info = bdrv_get_specific_info(bs, &local_err);
if (local_err) {
error_report_err(local_err);
return -EIO;
}
if (spec_info) {
printf("Format specific information:\n");
bdrv_image_info_specific_dump(fprintf, stdout, spec_info);