On Mon, Oct 10, 2011 at 10:14 AM, Jim <jim@xxxxxxxxxxxxx> wrote:
> Good morning Btrfs list,
> I am trying to create a subvolume of a directory tree (approximately 1.1
> million subvolumes under nfs1). The following error is thrown and without
> the wiki I don't know what argument is needed. I am running kernel
> 3.1.0-rc4.
>
> [root@btrfs ~]# btrfs sub snapshot /btrfs/nfs1/ /btrfs/snaps/
> Invalid arguments for subvolume snapshot
> [root@btrfs ~]# btrfs sub list /btrfs | head
> ID 256 top level 5 path nfs1
> ID 257 top level 5 path nfs2
> ID 258 top level 5 path nfs2/data
> ID 259 top level 5 path nfs1/data
> ID 260 top level 5 path nfs1/data/sites
> ID 261 top level 5 path nfs2/data/sites
> ID 262 top level 5 path nfs2/data/sites/0420
> ID 263 top level 5 path nfs2/data/sites/0421
> ID 264 top level 5 path nfs2/data/sites/0422
> ID 265 top level 5 path nfs2/data/sites/0423
>
> Any help is appreciated
> Thanks
> Jim
Aha! You're using Hugo Mills btrfs-progs repository I assume.
I've found it necessary to apply the following patch to Hugo Mills
btrfs-progs repo to get snapshots working:
diff --git a/btrfs_cmds.c b/btrfs_cmds.c
index 699dfc2..26a4e6f 100644
--- a/btrfs_cmds.c
+++ b/btrfs_cmds.c
@@ -372,7 +372,7 @@ int do_clone(int argc, char **argv)
return 1;
}
}
- if (argc - optind != 2) {
+ if (argc - optind != 3) {
fprintf(stderr, "Invalid arguments for subvolume snapshot\n");
free(argv);
return 1;
--
Hugo has indicated to me that he anticipates further modification to
parameter checking that would address this issue, but I'm not sure
where that stands.
Hugo: Let me know if you want me to send this patch to the list.
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