ceph: pass unhandled ceph.* setxattrs through to MDS
If we do not specifically understand a setxattr on a ceph.* virtual
xattr, send it through to the MDS. This allows us to implement new
functionality via the MDS without direct support on the client side.
Signed-off-by: Sage Weil <sage@inktank.com>
Reviewed-by: Sam Lang <sam.lang@inktank.com>
diff --git a/fs/ceph/xattr.c b/fs/ceph/xattr.c
index 43063d0..edc47de 100644
--- a/fs/ceph/xattr.c
+++ b/fs/ceph/xattr.c
@@ -777,6 +777,10 @@
if (vxattr && vxattr->readonly)
return -EOPNOTSUPP;
+ /* pass any unhandled ceph.* xattrs through to the MDS */
+ if (!strncmp(name, XATTR_CEPH_PREFIX, XATTR_CEPH_PREFIX_LEN))
+ goto do_sync_unlocked;
+
/* preallocate memory for xattr name, value, index node */
err = -ENOMEM;
newname = kmemdup(name, name_len + 1, GFP_NOFS);
@@ -833,6 +837,7 @@
do_sync:
spin_unlock(&ci->i_ceph_lock);
+do_sync_unlocked:
err = ceph_sync_setxattr(dentry, name, value, size, flags);
out:
kfree(newname);