Re: [Libguestfs] [PATCH] uuids: return ENOTSUP if could not set UUID for specific fs

Signed-off-by: Chen Hanxiao <chenhanxiao(a)cn.fujitsu.com&gt; --- daemon/uuids.c | 6 ++---- generator/actions.ml | 3 +++ 2 files changed, 5 insertions(+), 4 deletions(-) diff --git a/daemon/uuids.c b/daemon/uuids.c index 20eabe3..00c47d8 100644 --- a/daemon/uuids.c +++ b/daemon/uuids.c @@ -77,11 +77,9 @@ do_set_uuid (const char *device, const char *uuid) else if (STREQ (vfs_type, "btrfs")) r = btrfs_set_uuid (device, uuid); - else { - reply_with_error ("don't know how to set the UUID for '%s' filesystems", + else + NOT_SUPPORTED(-1, "don't know how to set the UUID for '%s' filesystems", vfs_type); - r = -1; - } return r; } diff --git a/generator/actions.ml b/generator/actions.ml index 92f80d2..7ecaf98 100644 --- a/generator/actions.ml +++ b/generator/actions.ml @@ -11804,6 +11804,9 @@ parameter. In future we may allow other flags to be adjusted." }; shortdesc = "set the filesystem UUID"; longdesc = "\ Set the filesystem UUID on C<device> to C<uuid>. +If this fails and the errno is ENOTSUP, +means that there is no support for changing the UUID +for the type of the specified filesystem. Only some filesystem types support setting UUIDs.