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

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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>
Cc: stable@vger.kernel.org # v3.20+
This commit is contained in:
Trond Myklebust
2016-08-23 11:19:33 -04:00
parent 9a0fe86745
commit b88fa69eaa
1 changed files with 1 additions and 0 deletions
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fs/nfs/pnfs.c
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@ -1555,6 +1555,7 @@ pnfs_update_layout(struct inode *ino,
} }
lookup_again: lookup_again:
nfs4_client_recover_expired_lease(clp);
first = false; first = false;
spin_lock(&ino->i_lock); spin_lock(&ino->i_lock);
lo = pnfs_find_alloc_layout(ino, ctx, gfp_flags); lo = pnfs_find_alloc_layout(ino, ctx, gfp_flags);