pnfs: add a nfs4_get_deviceid helper

This will be used by the block layout driver when splitting extents. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
git-mirror · Sep 10, 2014 · 30ff060 · 30ff060
1 parent 9dd2fcd
commit 30ff060
Showing 1 changed file with 7 additions and 0 deletions.
diff --git a/fs/nfs/pnfs.h b/fs/nfs/pnfs.h
@@ -280,6 +280,13 @@ void nfs4_deviceid_purge_client(const struct nfs_client *);
 int nfs4_deviceid_getdevicelist(struct nfs_server *server,
 		const struct nfs_fh *fh);
 
+static inline struct nfs4_deviceid_node *
+nfs4_get_deviceid(struct nfs4_deviceid_node *d)
+{
+	atomic_inc(&d->ref);
+	return d;
+}
+
 static inline struct pnfs_layout_segment *
 pnfs_get_lseg(struct pnfs_layout_segment *lseg)
 {