1 files changed, 74 insertions, 15 deletions

diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 1949bbd806eb..f5aecaabcb7c 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -634,15 +634,11 @@ out_sleep:
 }
 EXPORT_SYMBOL_GPL(nfs40_setup_sequence);
 
-static int nfs40_sequence_done(struct rpc_task *task,
-			       struct nfs4_sequence_res *res)
+static void nfs40_sequence_free_slot(struct nfs4_sequence_res *res)
 {
 	struct nfs4_slot *slot = res->sr_slot;
 	struct nfs4_slot_table *tbl;
 
-	if (slot == NULL)
-		goto out;
-
 	tbl = slot->table;
 	spin_lock(&tbl->slot_tbl_lock);
 	if (!nfs41_wake_and_assign_slot(tbl, slot))
@@ -650,7 +646,13 @@ static int nfs40_sequence_done(struct rpc_task *task,
 	spin_unlock(&tbl->slot_tbl_lock);
 
 	res->sr_slot = NULL;
-out:
+}
+
+static int nfs40_sequence_done(struct rpc_task *task,
+			       struct nfs4_sequence_res *res)
+{
+	if (res->sr_slot != NULL)
+		nfs40_sequence_free_slot(res);
 	return 1;
 }
 
@@ -666,6 +668,11 @@ static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
 	tbl = slot->table;
 	session = tbl->session;
 
+	/* Bump the slot sequence number */
+	if (slot->seq_done)
+		slot->seq_nr++;
+	slot->seq_done = 0;
+
 	spin_lock(&tbl->slot_tbl_lock);
 	/* Be nice to the server: try to ensure that the last transmitted
 	 * value for highest_user_slotid <= target_highest_slotid
@@ -686,9 +693,12 @@ out_unlock:
 	res->sr_slot = NULL;
 	if (send_new_highest_used_slotid)
 		nfs41_notify_server(session->clp);
+	if (waitqueue_active(&tbl->slot_waitq))
+		wake_up_all(&tbl->slot_waitq);
 }
 
-int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
+static int nfs41_sequence_process(struct rpc_task *task,
+		struct nfs4_sequence_res *res)
 {
 	struct nfs4_session *session;
 	struct nfs4_slot *slot = res->sr_slot;
@@ -714,7 +724,7 @@ int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
 	switch (res->sr_status) {
 	case 0:
 		/* Update the slot's sequence and clientid lease timer */
-		++slot->seq_nr;
+		slot->seq_done = 1;
 		clp = session->clp;
 		do_renew_lease(clp, res->sr_timestamp);
 		/* Check sequence flags */
@@ -769,16 +779,16 @@ int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
 		goto retry_nowait;
 	default:
 		/* Just update the slot sequence no. */
-		++slot->seq_nr;
+		slot->seq_done = 1;
 	}
 out:
 	/* The session may be reset by one of the error handlers. */
 	dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
-	nfs41_sequence_free_slot(res);
 out_noaction:
 	return ret;
 retry_nowait:
 	if (rpc_restart_call_prepare(task)) {
+		nfs41_sequence_free_slot(res);
 		task->tk_status = 0;
 		ret = 0;
 	}
@@ -789,8 +799,37 @@ out_retry:
 	rpc_delay(task, NFS4_POLL_RETRY_MAX);
 	return 0;
 }
+
+int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
+{
+	if (!nfs41_sequence_process(task, res))
+		return 0;
+	if (res->sr_slot != NULL)
+		nfs41_sequence_free_slot(res);
+	return 1;
+
+}
 EXPORT_SYMBOL_GPL(nfs41_sequence_done);
 
+static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res)
+{
+	if (res->sr_slot == NULL)
+		return 1;
+	if (res->sr_slot->table->session != NULL)
+		return nfs41_sequence_process(task, res);
+	return nfs40_sequence_done(task, res);
+}
+
+static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res)
+{
+	if (res->sr_slot != NULL) {
+		if (res->sr_slot->table->session != NULL)
+			nfs41_sequence_free_slot(res);
+		else
+			nfs40_sequence_free_slot(res);
+	}
+}
+
 int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
 {
 	if (res->sr_slot == NULL)
@@ -920,6 +959,17 @@ static int nfs4_setup_sequence(const struct nfs_server *server,
 				    args, res, task);
 }
 
+static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res)
+{
+	return nfs40_sequence_done(task, res);
+}
+
+static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res)
+{
+	if (res->sr_slot != NULL)
+		nfs40_sequence_free_slot(res);
+}
+
 int nfs4_sequence_done(struct rpc_task *task,
 		       struct nfs4_sequence_res *res)
 {
@@ -1197,6 +1247,7 @@ static void nfs4_opendata_free(struct kref *kref)
 	struct super_block *sb = p->dentry->d_sb;
 
 	nfs_free_seqid(p->o_arg.seqid);
+	nfs4_sequence_free_slot(&p->o_res.seq_res);
 	if (p->state != NULL)
 		nfs4_put_open_state(p->state);
 	nfs4_put_state_owner(p->owner);
@@ -1656,9 +1707,14 @@ err:
 static struct nfs4_state *
 nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
 {
+	struct nfs4_state *ret;
+
 	if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
-		return _nfs4_opendata_reclaim_to_nfs4_state(data);
-	return _nfs4_opendata_to_nfs4_state(data);
+		ret =_nfs4_opendata_reclaim_to_nfs4_state(data);
+	else
+		ret = _nfs4_opendata_to_nfs4_state(data);
+	nfs4_sequence_free_slot(&data->o_res.seq_res);
+	return ret;
 }
 
 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
@@ -2056,7 +2112,7 @@ static void nfs4_open_done(struct rpc_task *task, void *calldata)
 
 	data->rpc_status = task->tk_status;
 
-	if (!nfs4_sequence_done(task, &data->o_res.seq_res))
+	if (!nfs4_sequence_process(task, &data->o_res.seq_res))
 		return;
 
 	if (task->tk_status == 0) {
@@ -7864,7 +7920,7 @@ static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
 	struct nfs4_layoutget *lgp = calldata;
 
 	dprintk("--> %s\n", __func__);
-	nfs41_sequence_done(task, &lgp->res.seq_res);
+	nfs41_sequence_process(task, &lgp->res.seq_res);
 	dprintk("<-- %s\n", __func__);
 }
 
@@ -8080,6 +8136,7 @@ nfs4_proc_layoutget(struct nfs4_layoutget *lgp, long *timeout, gfp_t gfp_flags)
 	/* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
 	if (status == 0 && lgp->res.layoutp->len)
 		lseg = pnfs_layout_process(lgp);
+	nfs4_sequence_free_slot(&lgp->res.seq_res);
 	rpc_put_task(task);
 	dprintk("<-- %s status=%d\n", __func__, status);
 	if (status)
@@ -8106,7 +8163,7 @@ static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
 
 	dprintk("--> %s\n", __func__);
 
-	if (!nfs41_sequence_done(task, &lrp->res.seq_res))
+	if (!nfs41_sequence_process(task, &lrp->res.seq_res))
 		return;
 
 	server = NFS_SERVER(lrp->args.inode);
@@ -8118,6 +8175,7 @@ static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
 	case -NFS4ERR_DELAY:
 		if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
 			break;
+		nfs4_sequence_free_slot(&lrp->res.seq_res);
 		rpc_restart_call_prepare(task);
 		return;
 	}
@@ -8138,6 +8196,7 @@ static void nfs4_layoutreturn_release(void *calldata)
 		pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
 	pnfs_clear_layoutreturn_waitbit(lo);
 	spin_unlock(&lo->plh_inode->i_lock);
+	nfs4_sequence_free_slot(&lrp->res.seq_res);
 	pnfs_free_lseg_list(&freeme);
 	pnfs_put_layout_hdr(lrp->args.layout);
 	nfs_iput_and_deactive(lrp->inode);