#if defined(CONFIG_NFS_V4_1)
+static int nfs41_setup_state_renewal(struct nfs_client *clp)
+{
+ int status;
+ struct nfs_fsinfo fsinfo;
+
+ status = nfs4_proc_get_lease_time(clp, &fsinfo);
+ if (status == 0) {
+ /* Update lease time and schedule renewal */
+ spin_lock(&clp->cl_lock);
+ clp->cl_lease_time = fsinfo.lease_time * HZ;
+ clp->cl_last_renewal = jiffies;
+ spin_unlock(&clp->cl_lock);
+
+ nfs4_schedule_state_renewal(clp);
+ }
+
+ return status;
+}
+
+static void nfs4_end_drain_session(struct nfs_client *clp)
+{
+ struct nfs4_session *ses = clp->cl_session;
+ int max_slots;
+
+ if (test_and_clear_bit(NFS4CLNT_SESSION_DRAINING, &clp->cl_state)) {
+ spin_lock(&ses->fc_slot_table.slot_tbl_lock);
+ max_slots = ses->fc_slot_table.max_slots;
+ while (max_slots--) {
+ struct rpc_task *task;
+
+ task = rpc_wake_up_next(&ses->fc_slot_table.
+ slot_tbl_waitq);
+ if (!task)
+ break;
+ rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
+ }
+ spin_unlock(&ses->fc_slot_table.slot_tbl_lock);
+ }
+}
+
+static int nfs4_begin_drain_session(struct nfs_client *clp)
+{
+ struct nfs4_session *ses = clp->cl_session;
+ struct nfs4_slot_table *tbl = &ses->fc_slot_table;
+
+ spin_lock(&tbl->slot_tbl_lock);
+ set_bit(NFS4CLNT_SESSION_DRAINING, &clp->cl_state);
+ if (tbl->highest_used_slotid != -1) {
+ INIT_COMPLETION(ses->complete);
+ spin_unlock(&tbl->slot_tbl_lock);
+ return wait_for_completion_interruptible(&ses->complete);
+ }
+ spin_unlock(&tbl->slot_tbl_lock);
+ return 0;
+}
+
+int nfs41_init_clientid(struct nfs_client *clp, struct rpc_cred *cred)
+{
+ int status;
+
+ nfs4_begin_drain_session(clp);
+ status = nfs4_proc_exchange_id(clp, cred);
+ if (status != 0)
+ goto out;
+ status = nfs4_proc_create_session(clp);
+ if (status != 0)
+ goto out;
+ nfs41_setup_state_renewal(clp);
+ nfs_mark_client_ready(clp, NFS_CS_READY);
+out:
+ return status;
+}
+
struct rpc_cred *nfs4_get_exchange_id_cred(struct nfs_client *clp)
{
struct rpc_cred *cred;
INIT_LIST_HEAD(&lsp->ls_sequence.list);
lsp->ls_seqid.sequence = &lsp->ls_sequence;
atomic_set(&lsp->ls_count, 1);
+ lsp->ls_state = state;
lsp->ls_owner = fl_owner;
spin_lock(&clp->cl_lock);
nfs_alloc_unique_id(&clp->cl_lockowner_id, &lsp->ls_id, 1, 64);
if (lsp != NULL)
break;
if (new != NULL) {
- new->ls_state = state;
list_add(&new->ls_locks, &state->lock_states);
set_bit(LK_STATE_IN_USE, &state->flags);
lsp = new;
nfs4_put_lock_state(fl->fl_u.nfs4_fl.owner);
}
-static struct file_lock_operations nfs4_fl_lock_ops = {
+static const struct file_lock_operations nfs4_fl_lock_ops = {
.fl_copy_lock = nfs4_fl_copy_lock,
.fl_release_private = nfs4_fl_release_lock,
};
return new;
}
-void nfs_free_seqid(struct nfs_seqid *seqid)
+void nfs_release_seqid(struct nfs_seqid *seqid)
{
if (!list_empty(&seqid->list)) {
struct rpc_sequence *sequence = seqid->sequence->sequence;
spin_lock(&sequence->lock);
- list_del(&seqid->list);
+ list_del_init(&seqid->list);
spin_unlock(&sequence->lock);
rpc_wake_up(&sequence->wait);
}
+}
+
+void nfs_free_seqid(struct nfs_seqid *seqid)
+{
+ nfs_release_seqid(seqid);
kfree(seqid);
}
nfs4_schedule_state_manager(clp);
}
-static int nfs4_state_mark_reclaim_reboot(struct nfs_client *clp, struct nfs4_state *state)
+int nfs4_state_mark_reclaim_reboot(struct nfs_client *clp, struct nfs4_state *state)
{
set_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags);
struct file_lock *fl;
int status = 0;
+ if (inode->i_flock == NULL)
+ return 0;
+
+ /* Guard against delegation returns and new lock/unlock calls */
down_write(&nfsi->rwsem);
+ /* Protect inode->i_flock using the BKL */
+ lock_kernel();
for (fl = inode->i_flock; fl != NULL; fl = fl->fl_next) {
if (!(fl->fl_flags & (FL_POSIX|FL_FLOCK)))
continue;
if (nfs_file_open_context(fl->fl_file)->state != state)
continue;
+ unlock_kernel();
status = ops->recover_lock(state, fl);
- if (status >= 0)
- continue;
switch (status) {
+ case 0:
+ break;
+ case -ESTALE:
+ case -NFS4ERR_ADMIN_REVOKED:
+ case -NFS4ERR_STALE_STATEID:
+ case -NFS4ERR_BAD_STATEID:
+ case -NFS4ERR_EXPIRED:
+ case -NFS4ERR_NO_GRACE:
+ case -NFS4ERR_STALE_CLIENTID:
+ case -NFS4ERR_BADSESSION:
+ case -NFS4ERR_BADSLOT:
+ case -NFS4ERR_BAD_HIGH_SLOT:
+ case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
+ goto out;
default:
printk(KERN_ERR "%s: unhandled error %d. Zeroing state\n",
__func__, status);
- case -NFS4ERR_EXPIRED:
- case -NFS4ERR_NO_GRACE:
+ case -ENOMEM:
+ case -NFS4ERR_DENIED:
case -NFS4ERR_RECLAIM_BAD:
case -NFS4ERR_RECLAIM_CONFLICT:
/* kill_proc(fl->fl_pid, SIGLOST, 1); */
- break;
- case -NFS4ERR_STALE_CLIENTID:
- goto out_err;
+ status = 0;
}
+ lock_kernel();
}
- up_write(&nfsi->rwsem);
- return 0;
-out_err:
+ unlock_kernel();
+out:
up_write(&nfsi->rwsem);
return status;
}
printk(KERN_ERR "%s: unhandled error %d. Zeroing state\n",
__func__, status);
case -ENOENT:
+ case -ENOMEM:
case -ESTALE:
/*
* Open state on this file cannot be recovered
/* Mark the file as being 'closed' */
state->state = 0;
break;
+ case -NFS4ERR_ADMIN_REVOKED:
+ case -NFS4ERR_STALE_STATEID:
+ case -NFS4ERR_BAD_STATEID:
case -NFS4ERR_RECLAIM_BAD:
case -NFS4ERR_RECLAIM_CONFLICT:
nfs4_state_mark_reclaim_nograce(sp->so_client, state);
case -NFS4ERR_NO_GRACE:
nfs4_state_mark_reclaim_nograce(sp->so_client, state);
case -NFS4ERR_STALE_CLIENTID:
+ case -NFS4ERR_BADSESSION:
+ case -NFS4ERR_BADSLOT:
+ case -NFS4ERR_BAD_HIGH_SLOT:
+ case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
goto out_err;
}
nfs4_put_open_state(state);
nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_reboot);
}
+static void nfs4_reclaim_complete(struct nfs_client *clp,
+ const struct nfs4_state_recovery_ops *ops)
+{
+ /* Notify the server we're done reclaiming our state */
+ if (ops->reclaim_complete)
+ (void)ops->reclaim_complete(clp);
+}
+
static void nfs4_state_end_reclaim_reboot(struct nfs_client *clp)
{
struct nfs4_state_owner *sp;
if (!test_and_clear_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state))
return;
+ nfs4_reclaim_complete(clp,
+ nfs4_reboot_recovery_ops[clp->cl_minorversion]);
+
for (pos = rb_first(&clp->cl_state_owners); pos != NULL; pos = rb_next(pos)) {
sp = rb_entry(pos, struct nfs4_state_owner, so_client_node);
spin_lock(&sp->so_lock);
nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_nograce);
}
-static void nfs4_state_end_reclaim_nograce(struct nfs_client *clp)
-{
- clear_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state);
-}
-
-static void nfs4_recovery_handle_error(struct nfs_client *clp, int error)
+static int nfs4_recovery_handle_error(struct nfs_client *clp, int error)
{
switch (error) {
case -NFS4ERR_CB_PATH_DOWN:
nfs_handle_cb_pathdown(clp);
- break;
+ return 0;
+ case -NFS4ERR_NO_GRACE:
+ nfs4_state_end_reclaim_reboot(clp);
+ return 0;
case -NFS4ERR_STALE_CLIENTID:
case -NFS4ERR_LEASE_MOVED:
set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
+ nfs4_state_end_reclaim_reboot(clp);
nfs4_state_start_reclaim_reboot(clp);
break;
case -NFS4ERR_EXPIRED:
set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
nfs4_state_start_reclaim_nograce(clp);
+ break;
case -NFS4ERR_BADSESSION:
case -NFS4ERR_BADSLOT:
case -NFS4ERR_BAD_HIGH_SLOT:
case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
case -NFS4ERR_SEQ_FALSE_RETRY:
case -NFS4ERR_SEQ_MISORDERED:
- set_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state);
+ set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state);
+ /* Zero session reset errors */
+ return 0;
}
+ return error;
}
static int nfs4_do_reclaim(struct nfs_client *clp, const struct nfs4_state_recovery_ops *ops)
if (status < 0) {
set_bit(ops->owner_flag_bit, &sp->so_flags);
nfs4_put_state_owner(sp);
- nfs4_recovery_handle_error(clp, status);
- return status;
+ return nfs4_recovery_handle_error(clp, status);
}
nfs4_put_state_owner(sp);
goto restart;
status = ops->renew_lease(clp, cred);
put_rpccred(cred);
out:
- nfs4_recovery_handle_error(clp, status);
- return status;
+ return nfs4_recovery_handle_error(clp, status);
}
static int nfs4_reclaim_lease(struct nfs_client *clp)
}
#ifdef CONFIG_NFS_V4_1
-static void nfs4_session_recovery_handle_error(struct nfs_client *clp, int err)
+void nfs41_handle_recall_slot(struct nfs_client *clp)
{
- switch (err) {
- case -NFS4ERR_STALE_CLIENTID:
- set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
- set_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state);
+ set_bit(NFS4CLNT_RECALL_SLOT, &clp->cl_state);
+ nfs4_schedule_state_recovery(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);
}
}
+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);
+ }
+}
+
+static void nfs41_handle_state_revoked(struct nfs_client *clp)
+{
+ /* Temporary */
+ nfs4_reset_all_state(clp);
+}
+
+static void nfs41_handle_recallable_state_revoked(struct nfs_client *clp)
+{
+ /* This will need to handle layouts too */
+ nfs_expire_all_delegations(clp);
+}
+
+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);
+}
+
+void nfs41_handle_sequence_flag_errors(struct nfs_client *clp, u32 flags)
+{
+ if (!flags)
+ return;
+ else if (flags & SEQ4_STATUS_RESTART_RECLAIM_NEEDED)
+ nfs41_handle_server_reboot(clp);
+ else if (flags & (SEQ4_STATUS_EXPIRED_ALL_STATE_REVOKED |
+ SEQ4_STATUS_EXPIRED_SOME_STATE_REVOKED |
+ SEQ4_STATUS_ADMIN_STATE_REVOKED |
+ SEQ4_STATUS_LEASE_MOVED))
+ nfs41_handle_state_revoked(clp);
+ else if (flags & SEQ4_STATUS_RECALLABLE_STATE_REVOKED)
+ nfs41_handle_recallable_state_revoked(clp);
+ else if (flags & (SEQ4_STATUS_CB_PATH_DOWN |
+ SEQ4_STATUS_BACKCHANNEL_FAULT |
+ SEQ4_STATUS_CB_PATH_DOWN_SESSION))
+ nfs41_handle_cb_path_down(clp);
+}
+
static int nfs4_reset_session(struct nfs_client *clp)
{
int status;
+ nfs4_begin_drain_session(clp);
status = nfs4_proc_destroy_session(clp->cl_session);
if (status && status != -NFS4ERR_BADSESSION &&
status != -NFS4ERR_DEADSESSION) {
- nfs4_session_recovery_handle_error(clp, status);
+ status = nfs4_recovery_handle_error(clp, status);
goto out;
}
memset(clp->cl_session->sess_id.data, 0, NFS4_MAX_SESSIONID_LEN);
- status = nfs4_proc_create_session(clp, 1);
- if (status)
- nfs4_session_recovery_handle_error(clp, status);
- /* fall through*/
+ status = nfs4_proc_create_session(clp);
+ if (status) {
+ status = nfs4_recovery_handle_error(clp, status);
+ goto out;
+ }
+ /* create_session negotiated new slot table */
+ clear_bit(NFS4CLNT_RECALL_SLOT, &clp->cl_state);
+
+ /* Let the state manager reestablish state */
+ if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state))
+ nfs41_setup_state_renewal(clp);
out:
- /* Wake up the next rpc task even on error */
- rpc_wake_up_next(&clp->cl_session->fc_slot_table.slot_tbl_waitq);
return status;
}
-static int nfs4_initialize_session(struct nfs_client *clp)
+static int nfs4_recall_slot(struct nfs_client *clp)
{
- int status;
+ struct nfs4_slot_table *fc_tbl = &clp->cl_session->fc_slot_table;
+ struct nfs4_channel_attrs *fc_attrs = &clp->cl_session->fc_attrs;
+ struct nfs4_slot *new, *old;
+ int i;
+
+ nfs4_begin_drain_session(clp);
+ new = kmalloc(fc_tbl->target_max_slots * sizeof(struct nfs4_slot),
+ GFP_KERNEL);
+ if (!new)
+ return -ENOMEM;
- status = nfs4_proc_create_session(clp, 0);
- if (!status) {
- nfs_mark_client_ready(clp, NFS_CS_READY);
- } else if (status == -NFS4ERR_STALE_CLIENTID) {
- set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
- set_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state);
- } else {
- nfs_mark_client_ready(clp, status);
- }
- return status;
+ spin_lock(&fc_tbl->slot_tbl_lock);
+ for (i = 0; i < fc_tbl->target_max_slots; i++)
+ new[i].seq_nr = fc_tbl->slots[i].seq_nr;
+ old = fc_tbl->slots;
+ fc_tbl->slots = new;
+ fc_tbl->max_slots = fc_tbl->target_max_slots;
+ fc_tbl->target_max_slots = 0;
+ fc_attrs->max_reqs = fc_tbl->max_slots;
+ spin_unlock(&fc_tbl->slot_tbl_lock);
+
+ kfree(old);
+ nfs4_end_drain_session(clp);
+ return 0;
}
+
#else /* CONFIG_NFS_V4_1 */
static int nfs4_reset_session(struct nfs_client *clp) { return 0; }
-static int nfs4_initialize_session(struct nfs_client *clp) { return 0; }
+static int nfs4_end_drain_session(struct nfs_client *clp) { return 0; }
+static int nfs4_recall_slot(struct nfs_client *clp) { return 0; }
#endif /* CONFIG_NFS_V4_1 */
/* Set NFS4CLNT_LEASE_EXPIRED for all v4.0 errors and for recoverable errors
case -NFS4ERR_DELAY:
case -NFS4ERR_CLID_INUSE:
case -EAGAIN:
+ case -EKEYEXPIRED:
break;
case -NFS4ERR_NOT_SAME: /* FixMe: implement recovery
status = nfs4_reclaim_lease(clp);
if (status) {
nfs4_set_lease_expired(clp, status);
- if (status == -EAGAIN)
+ if (test_bit(NFS4CLNT_LEASE_EXPIRED,
+ &clp->cl_state))
continue;
if (clp->cl_cons_state ==
NFS_CS_SESSION_INITING)
goto out_error;
}
clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state);
+ set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state);
}
if (test_and_clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state)) {
status = nfs4_check_lease(clp);
- if (status != 0)
+ if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state))
continue;
+ if (status < 0 && status != -NFS4ERR_CB_PATH_DOWN)
+ goto out_error;
}
+
/* Initialize or reset the session */
- if (nfs4_has_session(clp) &&
- test_and_clear_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state)) {
- if (clp->cl_cons_state == NFS_CS_SESSION_INITING)
- status = nfs4_initialize_session(clp);
- else
- status = nfs4_reset_session(clp);
- if (status) {
- if (status == -NFS4ERR_STALE_CLIENTID)
- continue;
+ if (test_and_clear_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state)
+ && nfs4_has_session(clp)) {
+ status = nfs4_reset_session(clp);
+ if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state))
+ continue;
+ if (status < 0)
goto out_error;
- }
}
+
/* First recover reboot state... */
- if (test_and_clear_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) {
+ if (test_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) {
status = nfs4_do_reclaim(clp,
nfs4_reboot_recovery_ops[clp->cl_minorversion]);
- if (status == -NFS4ERR_STALE_CLIENTID)
- continue;
- if (test_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state))
+ if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) ||
+ test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state))
continue;
nfs4_state_end_reclaim_reboot(clp);
- continue;
+ if (test_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state))
+ continue;
+ if (status < 0)
+ goto out_error;
}
/* Now recover expired state... */
if (test_and_clear_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) {
status = nfs4_do_reclaim(clp,
nfs4_nograce_recovery_ops[clp->cl_minorversion]);
- if (status < 0) {
- set_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state);
- if (status == -NFS4ERR_STALE_CLIENTID)
- continue;
- if (status == -NFS4ERR_EXPIRED)
- continue;
- if (test_bit(NFS4CLNT_SESSION_SETUP,
- &clp->cl_state))
- continue;
+ if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) ||
+ test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state) ||
+ test_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state))
+ continue;
+ if (status < 0)
goto out_error;
- } else
- nfs4_state_end_reclaim_nograce(clp);
- continue;
}
+ nfs4_end_drain_session(clp);
if (test_and_clear_bit(NFS4CLNT_DELEGRETURN, &clp->cl_state)) {
nfs_client_return_marked_delegations(clp);
continue;
}
+ /* Recall session slots */
+ if (test_and_clear_bit(NFS4CLNT_RECALL_SLOT, &clp->cl_state)
+ && nfs4_has_session(clp)) {
+ status = nfs4_recall_slot(clp);
+ if (status < 0)
+ goto out_error;
+ continue;
+ }
+
nfs4_clear_state_manager_bit(clp);
/* Did we race with an attempt to give us more work? */
out_error:
printk(KERN_WARNING "Error: state manager failed on NFSv4 server %s"
" with error %d\n", clp->cl_hostname, -status);
- if (test_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state))
- nfs4_state_end_reclaim_reboot(clp);
+ nfs4_end_drain_session(clp);
nfs4_clear_state_manager_bit(clp);
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff