commit 884be175351e73c515303118150f195dd611787c
author Al Viro <viro@zeniv.linux.org.uk> Thu Apr 28 23:56:31 2016 -0400
committer Al Viro <viro@zeniv.linux.org.uk> Mon May 09 11:39:45 2016 -0400
tree ba85a80a6422df631b18af344132c6fcb67f1594
parent 9ac3d3e8460e3fa6f3a9a39c2049904005016db6

nfs: per-name sillyunlink exclusion

use d_alloc_parallel() for sillyunlink/lookup exclusion and
explicit rwsem (nfs_rmdir() being a writer and nfs_call_unlink() -
a reader) for rmdir/sillyunlink one.

That ought to make lookup/readdir/!O_CREAT atomic_open really
parallel on NFS.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

fs/nfs/nfs4proc.c

diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 7a7ac1d..084e857 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -3777,7 +3777,7 @@
 
 static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
 {
-	nfs4_setup_sequence(NFS_SERVER(data->dir),
+	nfs4_setup_sequence(NFS_SB(data->dentry->d_sb),
 			&data->args.seq_args,
 			&data->res.seq_res,
 			task);