From: Trond Myklebust <trond.myklebust@primarydata.com>
Date: Tue, 23 Aug 2016 15:19:33 +0000 (-0400)
Subject: pNFS: The client must not do I/O to the DS if it's lease has expired
X-Git-Tag: v4.7.5~143
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=36148aaa4fc5826fe9db860a2dcc15ad701159f6;p=thirdparty%2Fkernel%2Fstable.git

pNFS: The client must not do I/O to the DS if it's lease has expired

commit b88fa69eaa8649f11828158c7b65c4bcd886ebd5 upstream.

Ensure that the client conforms to the normative behaviour described in
RFC5661 Section 12.7.2: "If a client believes its lease has expired,
it MUST NOT send I/O to the storage device until it has validated its
lease."

So ensure that we wait for the lease to be validated before using
the layout.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c
index 7d992362ff04d..8b03cd3692792 100644
--- a/fs/nfs/pnfs.c
+++ b/fs/nfs/pnfs.c
@@ -1527,6 +1527,7 @@ pnfs_update_layout(struct inode *ino,
 	}
 
 lookup_again:
+	nfs4_client_recover_expired_lease(clp);
 	first = false;
 	spin_lock(&ino->i_lock);
 	lo = pnfs_find_alloc_layout(ino, ctx, gfp_flags);