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Commit 0400a6b0 authored by Trond Myklebust's avatar Trond Myklebust
Browse files

NFSv4/4.1: Fix nfs4_schedule_state_recovery abuses 



nfs4_schedule_state_recovery() should only be used when we need to force
the state manager to check the lease. If we just want to start the
state manager in order to handle a state recovery situation, we should be
using nfs4_schedule_state_manager().

This patch fixes the abuses of nfs4_schedule_state_recovery() by replacing
its use with a set of helper functions that do the right thing.

Signed-off-by: default avatarTrond Myklebust <Trond.Myklebust@netapp.com>
parent c34c32ea

fs/nfs/nfs4_fs.h

+7 −1
Original line number Diff line number Diff line
@@ -298,6 +298,11 @@ struct rpc_cred *nfs4_get_renew_cred_locked(struct nfs_client *clp); 
#if defined(CONFIG_NFS_V4_1)

struct rpc_cred *nfs4_get_machine_cred_locked(struct nfs_client *clp);

struct rpc_cred *nfs4_get_exchange_id_cred(struct nfs_client *clp);

extern void nfs4_schedule_session_recovery(struct nfs4_session *);

#else

static inline void nfs4_schedule_session_recovery(struct nfs4_session *session)

{

}

#endif /* CONFIG_NFS_V4_1 */



extern struct nfs4_state_owner * nfs4_get_state_owner(struct nfs_server *, struct rpc_cred *);
@@ -307,8 +312,9 @@ extern void nfs4_put_open_state(struct nfs4_state *); 
extern void nfs4_close_state(struct path *, struct nfs4_state *, fmode_t);

extern void nfs4_close_sync(struct path *, struct nfs4_state *, fmode_t);

extern void nfs4_state_set_mode_locked(struct nfs4_state *, fmode_t);

extern void nfs4_schedule_state_recovery(struct nfs_client *);

extern void nfs4_schedule_lease_recovery(struct nfs_client *);

extern void nfs4_schedule_state_manager(struct nfs_client *);

extern void nfs4_schedule_stateid_recovery(const struct nfs_server *, struct nfs4_state *);

extern int nfs4_state_mark_reclaim_nograce(struct nfs_client *clp, struct nfs4_state *state);

extern int nfs4_state_mark_reclaim_reboot(struct nfs_client *clp, struct nfs4_state *state);

extern void nfs41_handle_sequence_flag_errors(struct nfs_client *clp, u32 flags);

fs/nfs/nfs4proc.c

+23 −22
Original line number Diff line number Diff line
@@ -257,12 +257,13 @@ static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, 
		case -NFS4ERR_OPENMODE:

			if (state == NULL)

				break;

			nfs4_state_mark_reclaim_nograce(clp, state);

			goto do_state_recovery;

			nfs4_schedule_stateid_recovery(server, state);

			goto wait_on_recovery;

		case -NFS4ERR_STALE_STATEID:

		case -NFS4ERR_STALE_CLIENTID:

		case -NFS4ERR_EXPIRED:

			goto do_state_recovery;

			nfs4_schedule_lease_recovery(clp);

			goto wait_on_recovery;

#if defined(CONFIG_NFS_V4_1)

		case -NFS4ERR_BADSESSION:

		case -NFS4ERR_BADSLOT:
@@ -273,7 +274,7 @@ static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, 
		case -NFS4ERR_SEQ_MISORDERED:

			dprintk("%s ERROR: %d Reset session\n", __func__,

				errorcode);

			nfs4_schedule_state_recovery(clp);

			nfs4_schedule_session_recovery(clp->cl_session);

			exception->retry = 1;

			break;

#endif /* defined(CONFIG_NFS_V4_1) */
@@ -296,8 +297,7 @@ static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, 
	}

	/* We failed to handle the error */

	return nfs4_map_errors(ret);

do_state_recovery:

	nfs4_schedule_state_recovery(clp);

wait_on_recovery:

	ret = nfs4_wait_clnt_recover(clp);

	if (ret == 0)

		exception->retry = 1;
@@ -1256,14 +1256,13 @@ int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state 
			case -NFS4ERR_BAD_HIGH_SLOT:

			case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:

			case -NFS4ERR_DEADSESSION:

				nfs4_schedule_state_recovery(

					server->nfs_client);

				nfs4_schedule_session_recovery(server->nfs_client->cl_session);

				goto out;

			case -NFS4ERR_STALE_CLIENTID:

			case -NFS4ERR_STALE_STATEID:

			case -NFS4ERR_EXPIRED:

				/* Don't recall a delegation if it was lost */

				nfs4_schedule_state_recovery(server->nfs_client);

				nfs4_schedule_lease_recovery(server->nfs_client);

				goto out;

			case -ERESTARTSYS:

				/*
@@ -1272,7 +1271,7 @@ int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state 
				 */

			case -NFS4ERR_ADMIN_REVOKED:

			case -NFS4ERR_BAD_STATEID:

				nfs4_state_mark_reclaim_nograce(server->nfs_client, state);

				nfs4_schedule_stateid_recovery(server, state);

			case -EKEYEXPIRED:

				/*

				 * User RPCSEC_GSS context has expired.
@@ -1588,7 +1587,7 @@ static int nfs4_recover_expired_lease(struct nfs_server *server) 
		if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&

		    !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))

			break;

		nfs4_schedule_state_recovery(clp);

		nfs4_schedule_state_manager(clp);

		ret = -EIO;

	}

	return ret;
@@ -3179,7 +3178,7 @@ static void nfs4_renew_done(struct rpc_task *task, void *calldata) 
	if (task->tk_status < 0) {

		/* Unless we're shutting down, schedule state recovery! */

		if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)

			nfs4_schedule_state_recovery(clp);

			nfs4_schedule_lease_recovery(clp);

		return;

	}

	do_renew_lease(clp, timestamp);
@@ -3504,12 +3503,13 @@ nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, 
		case -NFS4ERR_OPENMODE:

			if (state == NULL)

				break;

			nfs4_state_mark_reclaim_nograce(clp, state);

			goto do_state_recovery;

			nfs4_schedule_stateid_recovery(server, state);

			goto wait_on_recovery;

		case -NFS4ERR_STALE_STATEID:

		case -NFS4ERR_STALE_CLIENTID:

		case -NFS4ERR_EXPIRED:

			goto do_state_recovery;

			nfs4_schedule_lease_recovery(clp);

			goto wait_on_recovery;

#if defined(CONFIG_NFS_V4_1)

		case -NFS4ERR_BADSESSION:

		case -NFS4ERR_BADSLOT:
@@ -3520,7 +3520,7 @@ nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, 
		case -NFS4ERR_SEQ_MISORDERED:

			dprintk("%s ERROR %d, Reset session\n", __func__,

				task->tk_status);

			nfs4_schedule_state_recovery(clp);

			nfs4_schedule_session_recovery(clp->cl_session);

			task->tk_status = 0;

			return -EAGAIN;

#endif /* CONFIG_NFS_V4_1 */
@@ -3537,9 +3537,8 @@ nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, 
	}

	task->tk_status = nfs4_map_errors(task->tk_status);

	return 0;

do_state_recovery:

wait_on_recovery:

	rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);

	nfs4_schedule_state_recovery(clp);

	if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)

		rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);

	task->tk_status = 0;
@@ -4406,12 +4405,14 @@ int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl) 
			case -NFS4ERR_EXPIRED:

			case -NFS4ERR_STALE_CLIENTID:

			case -NFS4ERR_STALE_STATEID:

				nfs4_schedule_lease_recovery(server->nfs_client);

				goto out;

			case -NFS4ERR_BADSESSION:

			case -NFS4ERR_BADSLOT:

			case -NFS4ERR_BAD_HIGH_SLOT:

			case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:

			case -NFS4ERR_DEADSESSION:

				nfs4_schedule_state_recovery(server->nfs_client);

				nfs4_schedule_session_recovery(server->nfs_client->cl_session);

				goto out;

			case -ERESTARTSYS:

				/*
@@ -4421,7 +4422,7 @@ int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl) 
			case -NFS4ERR_ADMIN_REVOKED:

			case -NFS4ERR_BAD_STATEID:

			case -NFS4ERR_OPENMODE:

				nfs4_state_mark_reclaim_nograce(server->nfs_client, state);

				nfs4_schedule_stateid_recovery(server, state);

				err = 0;

				goto out;

			case -EKEYEXPIRED:
@@ -5150,7 +5151,7 @@ static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client 
		rpc_delay(task, NFS4_POLL_RETRY_MAX);

		return -EAGAIN;

	default:

		nfs4_schedule_state_recovery(clp);

		nfs4_schedule_lease_recovery(clp);

	}

	return 0;

}
@@ -5291,7 +5292,7 @@ static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nf 
		rpc_delay(task, NFS4_POLL_RETRY_MAX);

		return -EAGAIN;

	default:

		nfs4_schedule_state_recovery(clp);

		nfs4_schedule_lease_recovery(clp);

	}

	return 0;

}

fs/nfs/nfs4state.c

+19 −6
Original line number Diff line number Diff line
@@ -1007,9 +1007,9 @@ void nfs4_schedule_state_manager(struct nfs_client *clp) 
}



/*

 * Schedule a state recovery attempt

 * Schedule a lease recovery attempt

 */

void nfs4_schedule_state_recovery(struct nfs_client *clp)

void nfs4_schedule_lease_recovery(struct nfs_client *clp)

{

	if (!clp)

		return;
@@ -1041,6 +1041,14 @@ int nfs4_state_mark_reclaim_nograce(struct nfs_client *clp, struct nfs4_state *s 
	return 1;

}



void nfs4_schedule_stateid_recovery(const struct nfs_server *server, struct nfs4_state *state)

{

	struct nfs_client *clp = server->nfs_client;



	nfs4_state_mark_reclaim_nograce(clp, state);

	nfs4_schedule_state_manager(clp);

}



static int nfs4_reclaim_locks(struct nfs4_state *state, const struct nfs4_state_recovery_ops *ops)

{

	struct inode *inode = state->inode;
@@ -1436,10 +1444,15 @@ static int nfs4_reclaim_lease(struct nfs_client *clp) 
}



#ifdef CONFIG_NFS_V4_1

void nfs4_schedule_session_recovery(struct nfs4_session *session)

{

	nfs4_schedule_lease_recovery(session->clp);

}



void nfs41_handle_recall_slot(struct nfs_client *clp)

{

	set_bit(NFS4CLNT_RECALL_SLOT, &clp->cl_state);

	nfs4_schedule_state_recovery(clp);

	nfs4_schedule_state_manager(clp);

}



static void nfs4_reset_all_state(struct nfs_client *clp)
@@ -1447,7 +1460,7 @@ static void nfs4_reset_all_state(struct nfs_client *clp) 
	if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0) {

		clp->cl_boot_time = CURRENT_TIME;

		nfs4_state_start_reclaim_nograce(clp);

		nfs4_schedule_state_recovery(clp);

		nfs4_schedule_state_manager(clp);

	}

}
@@ -1455,7 +1468,7 @@ static void nfs41_handle_server_reboot(struct nfs_client *clp) 
{

	if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0) {

		nfs4_state_start_reclaim_reboot(clp);

		nfs4_schedule_state_recovery(clp);

		nfs4_schedule_state_manager(clp);

	}

}
@@ -1475,7 +1488,7 @@ static void nfs41_handle_cb_path_down(struct nfs_client *clp) 
{

	nfs_expire_all_delegations(clp);

	if (test_and_set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state) == 0)

		nfs4_schedule_state_recovery(clp);

		nfs4_schedule_state_manager(clp);

}



void nfs41_handle_sequence_flag_errors(struct nfs_client *clp, u32 flags)

include/linux/nfs_fs_sb.h

+3 −5
Original line number Diff line number Diff line
@@ -68,9 +68,7 @@ struct nfs_client { 
	unsigned char		cl_id_uniquifier;

	u32			cl_cb_ident;	/* v4.0 callback identifier */

	const struct nfs4_minor_version_ops *cl_mvops;

#endif /* CONFIG_NFS_V4 */



#ifdef CONFIG_NFS_V4_1

	/* The sequence id to use for the next CREATE_SESSION */

	u32			cl_seqid;

	/* The flags used for obtaining the clientid during EXCHANGE_ID */
@@ -78,7 +76,7 @@ struct nfs_client { 
	struct nfs4_session	*cl_session; 	/* sharred session */

	struct list_head	cl_layouts;

	struct pnfs_deviceid_cache *cl_devid_cache; /* pNFS deviceid cache */

#endif /* CONFIG_NFS_V4_1 */

#endif /* CONFIG_NFS_V4 */



#ifdef CONFIG_NFS_FSCACHE

	struct fscache_cookie	*fscache;	/* client index cache cookie */
@@ -183,7 +181,7 @@ struct nfs_server { 
/* maximum number of slots to use */

#define NFS4_MAX_SLOT_TABLE RPC_MAX_SLOT_TABLE



#if defined(CONFIG_NFS_V4_1)

#if defined(CONFIG_NFS_V4)



/* Sessions */

#define SLOT_TABLE_SZ (NFS4_MAX_SLOT_TABLE/(8*sizeof(long)))
@@ -223,5 +221,5 @@ struct nfs4_session { 
	struct nfs_client		*clp;

};



#endif /* CONFIG_NFS_V4_1 */

#endif /* CONFIG_NFS_V4 */

#endif