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Commit 691daf3b authored by Andy Adamson's avatar Andy Adamson Committed by Trond Myklebust
Browse files

nfs41: drain session cleanup 



Do not wake up the next slot_tbl_waitq task in nfs4_free_slot because we
may be draining the slot. Either signal the state manager that the session
is drained (the state manager wakes up tasks) OR wake up the next task.

In nfs41_sequence_done, the slot dereference is only needed in the sequence
operation success case.

Signed-off-by: default avatarAndy Adamson <andros@netapp.com>
Signed-off-by: default avatarTrond Myklebust <Trond.Myklebust@netapp.com>
parent ea028ac9

fs/nfs/nfs4proc.c

+9 −9
Original line number Diff line number Diff line
@@ -336,7 +336,6 @@ nfs4_free_slot(struct nfs4_slot_table *tbl, u8 free_slotid) 
		else

			tbl->highest_used_slotid = -1;

	}

	rpc_wake_up_next(&tbl->slot_tbl_waitq);

	spin_unlock(&tbl->slot_tbl_lock);

	dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__,

		free_slotid, tbl->highest_used_slotid);
@@ -353,14 +352,13 @@ void nfs41_sequence_free_slot(const struct nfs_client *clp, 
	}

	tbl = &clp->cl_session->fc_slot_table;

	if (res->sr_slotid == NFS4_MAX_SLOT_TABLE) {

		dprintk("%s: No slot\n", __func__);

		/* just wake up the next guy waiting since

		 * we may have not consumed a slot after all */

		rpc_wake_up_next(&tbl->slot_tbl_waitq);

		return;

	}

		dprintk("%s: No slot\n", __func__);

	} else {

		nfs4_free_slot(tbl, res->sr_slotid);

		res->sr_slotid = NFS4_MAX_SLOT_TABLE;

	}



	/* Signal state manager thread if session is drained */

	if (test_bit(NFS4CLNT_SESSION_DRAINING, &clp->cl_state)) {
@@ -370,6 +368,8 @@ void nfs41_sequence_free_slot(const struct nfs_client *clp, 
			complete(&clp->cl_session->complete);

		}

		spin_unlock(&tbl->slot_tbl_lock);

	} else {

		rpc_wake_up_next(&tbl->slot_tbl_waitq);

	}

}
@@ -394,10 +394,10 @@ static void nfs41_sequence_done(struct nfs_client *clp, 
	if (res->sr_slotid == NFS4_MAX_SLOT_TABLE)

		goto out;



	/* Check the SEQUENCE operation status */

	if (res->sr_status == 0) {

		tbl = &clp->cl_session->fc_slot_table;

		slot = tbl->slots + res->sr_slotid;



	if (res->sr_status == 0) {

		/* Update the slot's sequence and clientid lease timer */

		++slot->seq_nr;

		timestamp = res->sr_renewal_time;