NFSv4: Add post-op attributes to nfs4_proc_link()

 Optimise attribute revalidation when hardlinking. Add post-op attributes
 for the directory and the original inode.

 Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

1 files changed, 17 insertions, 5 deletions

diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 7be3d2d..04995e3 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -1724,22 +1724,34 @@ static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
 
 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
 {
+	struct nfs_server *server = NFS_SERVER(inode);
 	struct nfs4_link_arg arg = {
 		.fh     = NFS_FH(inode),
 		.dir_fh = NFS_FH(dir),
 		.name   = name,
+		.bitmask = server->attr_bitmask,
+	};
+	struct nfs_fattr fattr, dir_attr;
+	struct nfs4_link_res res = {
+		.server = server,
+		.fattr = &fattr,
+		.dir_attr = &dir_attr,
 	};
-	struct nfs4_change_info	cinfo = { };
 	struct rpc_message msg = {
 		.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
 		.rpc_argp = &arg,
-		.rpc_resp = &cinfo,
+		.rpc_resp = &res,
 	};
 	int			status;
 
-	status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
-	if (!status)
-		update_changeattr(dir, &cinfo);
+	nfs_fattr_init(res.fattr);
+	nfs_fattr_init(res.dir_attr);
+	status = rpc_call_sync(server->client, &msg, 0);
+	if (!status) {
+		update_changeattr(dir, &res.cinfo);
+		nfs_post_op_update_inode(dir, res.dir_attr);
+		nfs_refresh_inode(inode, res.fattr);
+	}
 
 	return status;
 }