[pnfs] [PATCH 04/23] 2.6-latest pnfs client no lease update in nfs41_sequence_done for ds

[andros at umich.edu]

From: Andy Adamson <andros at umich.edu>

Allow a NULL nfs_client parameter to nfs41_sequence_done.

The data server has no lease to update. There is no way to reference the
data server's struct nfs_client because we don't keep one.

The use of struct nfs_client for data server session creation will
will probably be replaced with a structure with only relevant fields.

Signed-off by: Andy Adamson<andros at umich.edu>
---
 fs/nfs/nfs4proc.c |   10 +++++++---
 1 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 0185cae..594dabc 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -248,6 +248,10 @@ int nfs4_wait_bit_interruptible(void *word)
 }
 
 #ifdef CONFIG_NFS_V4_1
+/* For pNFS filelayout data servers:
+ * the nfs_client is NULL - to signal no lease update.
+ * session is the data server.
+ */
 static int nfs41_sequence_done(struct nfs_client *clp,
 	struct nfs4_session *session,
 	struct nfs41_sequence_res *res, int status)
@@ -256,8 +260,6 @@ static int nfs41_sequence_done(struct nfs_client *clp,
 	struct nfs4_slot_table *tbl;
 	struct nfs4_slot *slot;
 
-	BUG_ON(clp == NULL);
-
 	tbl = &session->fore_channel.slot_table;
 	slot = res->sr_slot;
 
@@ -280,6 +282,8 @@ static int nfs41_sequence_done(struct nfs_client *clp,
 			 * The sequence call was successful,
 			 * Update our lease renewal timers
 			 */
+			if (!clp)
+				goto no_update;
 			timestamp = res->sr_renewal_time;
 
 			spin_lock(&clp->cl_lock);
@@ -287,7 +291,7 @@ static int nfs41_sequence_done(struct nfs_client *clp,
 				clp->cl_last_renewal = timestamp;
 			spin_unlock(&clp->cl_lock);
 	} 
-
+no_update:
 	/* Clear the 'busy' bit on the slot that was used */
 	smp_mb__before_clear_bit();
 	clear_bit(NFS4_SLOT_BUSY, &slot->flags);
-- 
1.5.0.2