Commit f3c77484 authored by Trond Myklebust's avatar Trond Myklebust Committed by Sasha Levin

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

[ Upstream commit b88fa69e ]

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: default avatarTrond Myklebust <trond.myklebust@primarydata.com>
Cc: stable@vger.kernel.org # v3.20+
Signed-off-by: default avatarSasha Levin <alexander.levin@verizon.com>
parent 47998eb5
......@@ -1472,6 +1472,7 @@ pnfs_update_layout(struct inode *ino,
goto out;
lookup_again:
nfs4_client_recover_expired_lease(clp);
first = false;
spin_lock(&ino->i_lock);
lo = pnfs_find_alloc_layout(ino, ctx, gfp_flags);
......
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