block: Improve some block-commit, block-stream error messages
block-commit defaults @base-node to the deepest backing image. When
there is none, it fails with "Base 'NULL' not found". Improve to
"There is no backing image".
block-commit and block-stream reject a @base argument that doesn't
resolve with "Base 'BASE' not found". Commit 6b33f3ae8b "qemu-img:
Improve commit invalid base message" improved this message in
qemu-img. Improve it here, too: "Can't find '%s' in the backing
chain".
QERR_BASE_NOT_FOUND is now unused. Drop.
Cc: Kevin Wolf <kwolf@redhat.com>
Cc: Max Reitz <mreitz@redhat.com>
Cc: qemu-block@nongnu.org
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20201113082626.2725812-4-armbru@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
diff --git a/blockdev.c b/blockdev.c
index fe6fb5d..d05a874 100644
--- a/blockdev.c
+++ b/blockdev.c
@@ -2531,7 +2531,7 @@
if (has_base) {
base_bs = bdrv_find_backing_image(bs, base);
if (base_bs == NULL) {
- error_setg(errp, QERR_BASE_NOT_FOUND, base);
+ error_setg(errp, "Can't find '%s' in the backing chain", base);
goto out;
}
assert(bdrv_get_aio_context(base_bs) == aio_context);
@@ -2703,13 +2703,16 @@
}
} else if (has_base && base) {
base_bs = bdrv_find_backing_image(top_bs, base);
+ if (base_bs == NULL) {
+ error_setg(errp, "Can't find '%s' in the backing chain", base);
+ goto out;
+ }
} else {
base_bs = bdrv_find_base(top_bs);
- }
-
- if (base_bs == NULL) {
- error_setg(errp, QERR_BASE_NOT_FOUND, base ? base : "NULL");
- goto out;
+ if (base_bs == NULL) {
+ error_setg(errp, "There is no backimg image");
+ goto out;
+ }
}
assert(bdrv_get_aio_context(base_bs) == aio_context);
