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NFSv4/4.1: Fix nfs4_schedule_state_recovery abuses
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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: Trond Myklebust <[email protected]>
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Trond Myklebust authored and Trond Myklebust committed Mar 11, 2011
1 parent c34c32e commit 0400a6b
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Showing 4 changed files with 52 additions and 34 deletions.
8 changes: 7 additions & 1 deletion fs/nfs/nfs4_fs.h
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Original file line number Diff line number Diff line change
Expand Up @@ -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 *);
Expand All @@ -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);
Expand Down
45 changes: 23 additions & 22 deletions fs/nfs/nfs4proc.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -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:
Expand All @@ -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) */
Expand All @@ -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;
Expand Down Expand Up @@ -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:
/*
Expand All @@ -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.
Expand Down Expand Up @@ -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;
Expand Down Expand Up @@ -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);
Expand Down Expand Up @@ -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:
Expand All @@ -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 */
Expand All @@ -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;
Expand Down Expand Up @@ -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:
/*
Expand All @@ -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:
Expand Down Expand Up @@ -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;
}
Expand Down Expand Up @@ -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;
}
Expand Down
25 changes: 19 additions & 6 deletions fs/nfs/nfs4state.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -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;
Expand Down Expand Up @@ -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;
Expand Down Expand Up @@ -1436,26 +1444,31 @@ 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)
{
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);
}
}

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);
}
}

Expand All @@ -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)
Expand Down
8 changes: 3 additions & 5 deletions include/linux/nfs_fs_sb.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -68,17 +68,15 @@ 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 */
u32 cl_exchange_flags;
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 */
Expand Down Expand Up @@ -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)))
Expand Down Expand Up @@ -223,5 +221,5 @@ struct nfs4_session {
struct nfs_client *clp;
};

#endif /* CONFIG_NFS_V4_1 */
#endif /* CONFIG_NFS_V4 */
#endif

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