* subsequent patch.
*/
-#include <linux/config.h>
+#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/smp_lock.h>
#include <linux/nfs_fs.h>
#include <linux/nfs_idmap.h>
+#include <linux/kthread.h>
+#include <linux/module.h>
+#include <linux/random.h>
#include <linux/workqueue.h>
#include <linux/bitops.h>
#include "nfs4_fs.h"
#include "callback.h"
#include "delegation.h"
+#include "internal.h"
#define OPENOWNER_POOL_SIZE 8
const nfs4_stateid zero_stateid;
-static DEFINE_SPINLOCK(state_spinlock);
static LIST_HEAD(nfs4_clientid_list);
-static void nfs4_recover_state(void *);
-
-void
-init_nfsv4_state(struct nfs_server *server)
+static int nfs4_init_client(struct nfs_client *clp, struct rpc_cred *cred)
{
- server->nfs4_state = NULL;
- INIT_LIST_HEAD(&server->nfs4_siblings);
+ int status = nfs4_proc_setclientid(clp, NFS4_CALLBACK,
+ nfs_callback_tcpport, cred);
+ if (status == 0)
+ status = nfs4_proc_setclientid_confirm(clp, cred);
+ if (status == 0)
+ nfs4_schedule_state_renewal(clp);
+ return status;
}
-void
-destroy_nfsv4_state(struct nfs_server *server)
+static struct rpc_cred *nfs4_get_machine_cred_locked(struct nfs_client *clp)
{
- if (server->mnt_path) {
- kfree(server->mnt_path);
- server->mnt_path = NULL;
- }
- if (server->nfs4_state) {
- nfs4_put_client(server->nfs4_state);
- server->nfs4_state = NULL;
- }
+ struct rpc_cred *cred = NULL;
+
+ if (clp->cl_machine_cred != NULL)
+ cred = get_rpccred(clp->cl_machine_cred);
+ return cred;
}
-/*
- * nfs4_get_client(): returns an empty client structure
- * nfs4_put_client(): drops reference to client structure
- *
- * Since these are allocated/deallocated very rarely, we don't
- * bother putting them in a slab cache...
- */
-static struct nfs4_client *
-nfs4_alloc_client(struct in_addr *addr)
+static void nfs4_clear_machine_cred(struct nfs_client *clp)
{
- struct nfs4_client *clp;
+ struct rpc_cred *cred;
- if (nfs_callback_up() < 0)
- return NULL;
- if ((clp = kmalloc(sizeof(*clp), GFP_KERNEL)) == NULL) {
- nfs_callback_down();
- return NULL;
- }
- memset(clp, 0, sizeof(*clp));
- memcpy(&clp->cl_addr, addr, sizeof(clp->cl_addr));
- init_rwsem(&clp->cl_sem);
- INIT_LIST_HEAD(&clp->cl_delegations);
- INIT_LIST_HEAD(&clp->cl_state_owners);
- INIT_LIST_HEAD(&clp->cl_unused);
- spin_lock_init(&clp->cl_lock);
- atomic_set(&clp->cl_count, 1);
- INIT_WORK(&clp->cl_recoverd, nfs4_recover_state, clp);
- INIT_WORK(&clp->cl_renewd, nfs4_renew_state, clp);
- INIT_LIST_HEAD(&clp->cl_superblocks);
- init_waitqueue_head(&clp->cl_waitq);
- rpc_init_wait_queue(&clp->cl_rpcwaitq, "NFS4 client");
- clp->cl_rpcclient = ERR_PTR(-EINVAL);
- clp->cl_boot_time = CURRENT_TIME;
- clp->cl_state = 1 << NFS4CLNT_OK;
- return clp;
+ spin_lock(&clp->cl_lock);
+ cred = clp->cl_machine_cred;
+ clp->cl_machine_cred = NULL;
+ spin_unlock(&clp->cl_lock);
+ if (cred != NULL)
+ put_rpccred(cred);
}
-static void
-nfs4_free_client(struct nfs4_client *clp)
+struct rpc_cred *nfs4_get_renew_cred_locked(struct nfs_client *clp)
{
struct nfs4_state_owner *sp;
+ struct rb_node *pos;
+ struct rpc_cred *cred = NULL;
- while (!list_empty(&clp->cl_unused)) {
- sp = list_entry(clp->cl_unused.next,
- struct nfs4_state_owner,
- so_list);
- list_del(&sp->so_list);
- kfree(sp);
- }
- BUG_ON(!list_empty(&clp->cl_state_owners));
- if (clp->cl_cred)
- put_rpccred(clp->cl_cred);
- nfs_idmap_delete(clp);
- if (!IS_ERR(clp->cl_rpcclient))
- rpc_shutdown_client(clp->cl_rpcclient);
- kfree(clp);
- nfs_callback_down();
-}
-
-static struct nfs4_client *__nfs4_find_client(struct in_addr *addr)
-{
- struct nfs4_client *clp;
- list_for_each_entry(clp, &nfs4_clientid_list, cl_servers) {
- if (memcmp(&clp->cl_addr, addr, sizeof(clp->cl_addr)) == 0) {
- atomic_inc(&clp->cl_count);
- return clp;
- }
+ 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);
+ if (list_empty(&sp->so_states))
+ continue;
+ cred = get_rpccred(sp->so_cred);
+ break;
}
- return NULL;
+ return cred;
}
-struct nfs4_client *nfs4_find_client(struct in_addr *addr)
+static struct rpc_cred *nfs4_get_renew_cred(struct nfs_client *clp)
{
- struct nfs4_client *clp;
- spin_lock(&state_spinlock);
- clp = __nfs4_find_client(addr);
- spin_unlock(&state_spinlock);
- return clp;
+ struct rpc_cred *cred;
+
+ spin_lock(&clp->cl_lock);
+ cred = nfs4_get_renew_cred_locked(clp);
+ spin_unlock(&clp->cl_lock);
+ return cred;
}
-struct nfs4_client *
-nfs4_get_client(struct in_addr *addr)
+static struct rpc_cred *nfs4_get_setclientid_cred(struct nfs_client *clp)
{
- struct nfs4_client *clp, *new = NULL;
+ struct nfs4_state_owner *sp;
+ struct rb_node *pos;
+ struct rpc_cred *cred;
- spin_lock(&state_spinlock);
+ spin_lock(&clp->cl_lock);
+ cred = nfs4_get_machine_cred_locked(clp);
+ if (cred != NULL)
+ goto out;
+ pos = rb_first(&clp->cl_state_owners);
+ if (pos != NULL) {
+ sp = rb_entry(pos, struct nfs4_state_owner, so_client_node);
+ cred = get_rpccred(sp->so_cred);
+ }
+out:
+ spin_unlock(&clp->cl_lock);
+ return cred;
+}
+
+static void nfs_alloc_unique_id(struct rb_root *root, struct nfs_unique_id *new,
+ __u64 minval, int maxbits)
+{
+ struct rb_node **p, *parent;
+ struct nfs_unique_id *pos;
+ __u64 mask = ~0ULL;
+
+ if (maxbits < 64)
+ mask = (1ULL << maxbits) - 1ULL;
+
+ /* Ensure distribution is more or less flat */
+ get_random_bytes(&new->id, sizeof(new->id));
+ new->id &= mask;
+ if (new->id < minval)
+ new->id += minval;
+retry:
+ p = &root->rb_node;
+ parent = NULL;
+
+ while (*p != NULL) {
+ parent = *p;
+ pos = rb_entry(parent, struct nfs_unique_id, rb_node);
+
+ if (new->id < pos->id)
+ p = &(*p)->rb_left;
+ else if (new->id > pos->id)
+ p = &(*p)->rb_right;
+ else
+ goto id_exists;
+ }
+ rb_link_node(&new->rb_node, parent, p);
+ rb_insert_color(&new->rb_node, root);
+ return;
+id_exists:
for (;;) {
- clp = __nfs4_find_client(addr);
- if (clp != NULL)
- break;
- clp = new;
- if (clp != NULL) {
- list_add(&clp->cl_servers, &nfs4_clientid_list);
- new = NULL;
+ new->id++;
+ if (new->id < minval || (new->id & mask) != new->id) {
+ new->id = minval;
break;
}
- spin_unlock(&state_spinlock);
- new = nfs4_alloc_client(addr);
- spin_lock(&state_spinlock);
- if (new == NULL)
+ parent = rb_next(parent);
+ if (parent == NULL)
+ break;
+ pos = rb_entry(parent, struct nfs_unique_id, rb_node);
+ if (new->id < pos->id)
break;
}
- spin_unlock(&state_spinlock);
- if (new)
- nfs4_free_client(new);
- return clp;
+ goto retry;
}
-void
-nfs4_put_client(struct nfs4_client *clp)
+static void nfs_free_unique_id(struct rb_root *root, struct nfs_unique_id *id)
{
- if (!atomic_dec_and_lock(&clp->cl_count, &state_spinlock))
- return;
- list_del(&clp->cl_servers);
- spin_unlock(&state_spinlock);
- BUG_ON(!list_empty(&clp->cl_superblocks));
- wake_up_all(&clp->cl_waitq);
- rpc_wake_up(&clp->cl_rpcwaitq);
- nfs4_kill_renewd(clp);
- nfs4_free_client(clp);
+ rb_erase(&id->rb_node, root);
}
-static int __nfs4_init_client(struct nfs4_client *clp)
+static struct nfs4_state_owner *
+nfs4_find_state_owner(struct nfs_server *server, struct rpc_cred *cred)
{
- int status = nfs4_proc_setclientid(clp, NFS4_CALLBACK, nfs_callback_tcpport);
- if (status == 0)
- status = nfs4_proc_setclientid_confirm(clp);
- if (status == 0)
- nfs4_schedule_state_renewal(clp);
- return status;
-}
+ struct nfs_client *clp = server->nfs_client;
+ struct rb_node **p = &clp->cl_state_owners.rb_node,
+ *parent = NULL;
+ struct nfs4_state_owner *sp, *res = NULL;
-int nfs4_init_client(struct nfs4_client *clp)
-{
- return nfs4_map_errors(__nfs4_init_client(clp));
-}
+ while (*p != NULL) {
+ parent = *p;
+ sp = rb_entry(parent, struct nfs4_state_owner, so_client_node);
-u32
-nfs4_alloc_lockowner_id(struct nfs4_client *clp)
-{
- return clp->cl_lockowner_id ++;
+ if (server < sp->so_server) {
+ p = &parent->rb_left;
+ continue;
+ }
+ if (server > sp->so_server) {
+ p = &parent->rb_right;
+ continue;
+ }
+ if (cred < sp->so_cred)
+ p = &parent->rb_left;
+ else if (cred > sp->so_cred)
+ p = &parent->rb_right;
+ else {
+ atomic_inc(&sp->so_count);
+ res = sp;
+ break;
+ }
+ }
+ return res;
}
static struct nfs4_state_owner *
-nfs4_client_grab_unused(struct nfs4_client *clp, struct rpc_cred *cred)
+nfs4_insert_state_owner(struct nfs_client *clp, struct nfs4_state_owner *new)
{
- struct nfs4_state_owner *sp = NULL;
+ struct rb_node **p = &clp->cl_state_owners.rb_node,
+ *parent = NULL;
+ struct nfs4_state_owner *sp;
- if (!list_empty(&clp->cl_unused)) {
- sp = list_entry(clp->cl_unused.next, struct nfs4_state_owner, so_list);
- atomic_inc(&sp->so_count);
- sp->so_cred = cred;
- list_move(&sp->so_list, &clp->cl_state_owners);
- clp->cl_nunused--;
+ while (*p != NULL) {
+ parent = *p;
+ sp = rb_entry(parent, struct nfs4_state_owner, so_client_node);
+
+ if (new->so_server < sp->so_server) {
+ p = &parent->rb_left;
+ continue;
+ }
+ if (new->so_server > sp->so_server) {
+ p = &parent->rb_right;
+ continue;
+ }
+ if (new->so_cred < sp->so_cred)
+ p = &parent->rb_left;
+ else if (new->so_cred > sp->so_cred)
+ p = &parent->rb_right;
+ else {
+ atomic_inc(&sp->so_count);
+ return sp;
+ }
}
- return sp;
+ nfs_alloc_unique_id(&clp->cl_openowner_id, &new->so_owner_id, 1, 64);
+ rb_link_node(&new->so_client_node, parent, p);
+ rb_insert_color(&new->so_client_node, &clp->cl_state_owners);
+ return new;
}
-static struct nfs4_state_owner *
-nfs4_find_state_owner(struct nfs4_client *clp, struct rpc_cred *cred)
+static void
+nfs4_remove_state_owner(struct nfs_client *clp, struct nfs4_state_owner *sp)
{
- struct nfs4_state_owner *sp, *res = NULL;
-
- list_for_each_entry(sp, &clp->cl_state_owners, so_list) {
- if (sp->so_cred != cred)
- continue;
- atomic_inc(&sp->so_count);
- /* Move to the head of the list */
- list_move(&sp->so_list, &clp->cl_state_owners);
- res = sp;
- break;
- }
- return res;
+ if (!RB_EMPTY_NODE(&sp->so_client_node))
+ rb_erase(&sp->so_client_node, &clp->cl_state_owners);
+ nfs_free_unique_id(&clp->cl_openowner_id, &sp->so_owner_id);
}
/*
sp = kzalloc(sizeof(*sp),GFP_KERNEL);
if (!sp)
return NULL;
+ spin_lock_init(&sp->so_lock);
INIT_LIST_HEAD(&sp->so_states);
INIT_LIST_HEAD(&sp->so_delegations);
rpc_init_wait_queue(&sp->so_sequence.wait, "Seqid_waitqueue");
return sp;
}
-void
+static void
nfs4_drop_state_owner(struct nfs4_state_owner *sp)
{
- struct nfs4_client *clp = sp->so_client;
- spin_lock(&clp->cl_lock);
- list_del_init(&sp->so_list);
- spin_unlock(&clp->cl_lock);
+ if (!RB_EMPTY_NODE(&sp->so_client_node)) {
+ struct nfs_client *clp = sp->so_client;
+
+ spin_lock(&clp->cl_lock);
+ rb_erase(&sp->so_client_node, &clp->cl_state_owners);
+ RB_CLEAR_NODE(&sp->so_client_node);
+ spin_unlock(&clp->cl_lock);
+ }
}
-/*
- * Note: must be called with clp->cl_sem held in order to prevent races
- * with reboot recovery!
- */
struct nfs4_state_owner *nfs4_get_state_owner(struct nfs_server *server, struct rpc_cred *cred)
{
- struct nfs4_client *clp = server->nfs4_state;
+ struct nfs_client *clp = server->nfs_client;
struct nfs4_state_owner *sp, *new;
- get_rpccred(cred);
- new = nfs4_alloc_state_owner();
spin_lock(&clp->cl_lock);
- sp = nfs4_find_state_owner(clp, cred);
- if (sp == NULL)
- sp = nfs4_client_grab_unused(clp, cred);
- if (sp == NULL && new != NULL) {
- list_add(&new->so_list, &clp->cl_state_owners);
- new->so_client = clp;
- new->so_id = nfs4_alloc_lockowner_id(clp);
- new->so_cred = cred;
- sp = new;
- new = NULL;
- }
+ sp = nfs4_find_state_owner(server, cred);
spin_unlock(&clp->cl_lock);
- if (new)
- kfree(new);
if (sp != NULL)
return sp;
- put_rpccred(cred);
- return NULL;
+ new = nfs4_alloc_state_owner();
+ if (new == NULL)
+ return NULL;
+ new->so_client = clp;
+ new->so_server = server;
+ new->so_cred = cred;
+ spin_lock(&clp->cl_lock);
+ sp = nfs4_insert_state_owner(clp, new);
+ spin_unlock(&clp->cl_lock);
+ if (sp == new)
+ get_rpccred(cred);
+ else {
+ rpc_destroy_wait_queue(&new->so_sequence.wait);
+ kfree(new);
+ }
+ return sp;
}
-/*
- * Must be called with clp->cl_sem held in order to avoid races
- * with state recovery...
- */
void nfs4_put_state_owner(struct nfs4_state_owner *sp)
{
- struct nfs4_client *clp = sp->so_client;
+ struct nfs_client *clp = sp->so_client;
struct rpc_cred *cred = sp->so_cred;
if (!atomic_dec_and_lock(&sp->so_count, &clp->cl_lock))
return;
- if (clp->cl_nunused >= OPENOWNER_POOL_SIZE)
- goto out_free;
- if (list_empty(&sp->so_list))
- goto out_free;
- list_move(&sp->so_list, &clp->cl_unused);
- clp->cl_nunused++;
- spin_unlock(&clp->cl_lock);
- put_rpccred(cred);
- cred = NULL;
- return;
-out_free:
- list_del(&sp->so_list);
+ nfs4_remove_state_owner(clp, sp);
spin_unlock(&clp->cl_lock);
+ rpc_destroy_wait_queue(&sp->so_sequence.wait);
put_rpccred(cred);
kfree(sp);
}
{
struct nfs4_state *state;
- state = kmalloc(sizeof(*state), GFP_KERNEL);
+ state = kzalloc(sizeof(*state), GFP_KERNEL);
if (!state)
return NULL;
- state->state = 0;
- state->nreaders = 0;
- state->nwriters = 0;
- state->flags = 0;
- memset(state->stateid.data, 0, sizeof(state->stateid.data));
atomic_set(&state->count, 1);
INIT_LIST_HEAD(&state->lock_states);
spin_lock_init(&state->state_lock);
+ seqlock_init(&state->seqlock);
return state;
}
-static struct nfs4_state *
-__nfs4_find_state(struct inode *inode, struct rpc_cred *cred, mode_t mode)
+void
+nfs4_state_set_mode_locked(struct nfs4_state *state, mode_t mode)
{
- struct nfs_inode *nfsi = NFS_I(inode);
- struct nfs4_state *state;
-
- mode &= (FMODE_READ|FMODE_WRITE);
- list_for_each_entry(state, &nfsi->open_states, inode_states) {
- if (state->owner->so_cred != cred)
- continue;
- if ((mode & FMODE_READ) != 0 && state->nreaders == 0)
- continue;
- if ((mode & FMODE_WRITE) != 0 && state->nwriters == 0)
- continue;
- if ((state->state & mode) != mode)
- continue;
- atomic_inc(&state->count);
- if (mode & FMODE_READ)
- state->nreaders++;
+ if (state->state == mode)
+ return;
+ /* NB! List reordering - see the reclaim code for why. */
+ if ((mode & FMODE_WRITE) != (state->state & FMODE_WRITE)) {
if (mode & FMODE_WRITE)
- state->nwriters++;
- return state;
+ list_move(&state->open_states, &state->owner->so_states);
+ else
+ list_move_tail(&state->open_states, &state->owner->so_states);
}
- return NULL;
+ state->state = mode;
}
static struct nfs4_state *
struct nfs4_state *state;
list_for_each_entry(state, &nfsi->open_states, inode_states) {
- /* Is this in the process of being freed? */
- if (state->nreaders == 0 && state->nwriters == 0)
+ if (state->owner != owner)
continue;
- if (state->owner == owner) {
- atomic_inc(&state->count);
+ if (atomic_inc_not_zero(&state->count))
return state;
- }
}
return NULL;
}
-struct nfs4_state *
-nfs4_find_state(struct inode *inode, struct rpc_cred *cred, mode_t mode)
-{
- struct nfs4_state *state;
-
- spin_lock(&inode->i_lock);
- state = __nfs4_find_state(inode, cred, mode);
- spin_unlock(&inode->i_lock);
- return state;
-}
-
static void
nfs4_free_open_state(struct nfs4_state *state)
{
if (state)
goto out;
new = nfs4_alloc_open_state();
+ spin_lock(&owner->so_lock);
spin_lock(&inode->i_lock);
state = __nfs4_find_state_byowner(inode, owner);
if (state == NULL && new != NULL) {
state = new;
- /* Note: The reclaim code dictates that we add stateless
- * and read-only stateids to the end of the list */
- list_add_tail(&state->open_states, &owner->so_states);
state->owner = owner;
atomic_inc(&owner->so_count);
list_add(&state->inode_states, &nfsi->open_states);
state->inode = igrab(inode);
spin_unlock(&inode->i_lock);
+ /* Note: The reclaim code dictates that we add stateless
+ * and read-only stateids to the end of the list */
+ list_add_tail(&state->open_states, &owner->so_states);
+ spin_unlock(&owner->so_lock);
} else {
spin_unlock(&inode->i_lock);
+ spin_unlock(&owner->so_lock);
if (new)
nfs4_free_open_state(new);
}
return state;
}
-/*
- * Beware! Caller must be holding exactly one
- * reference to clp->cl_sem!
- */
void nfs4_put_open_state(struct nfs4_state *state)
{
struct inode *inode = state->inode;
struct nfs4_state_owner *owner = state->owner;
- if (!atomic_dec_and_lock(&state->count, &inode->i_lock))
+ if (!atomic_dec_and_lock(&state->count, &owner->so_lock))
return;
- if (!list_empty(&state->inode_states))
- list_del(&state->inode_states);
- spin_unlock(&inode->i_lock);
+ spin_lock(&inode->i_lock);
+ list_del(&state->inode_states);
list_del(&state->open_states);
+ spin_unlock(&inode->i_lock);
+ spin_unlock(&owner->so_lock);
iput(inode);
- BUG_ON (state->state != 0);
nfs4_free_open_state(state);
nfs4_put_state_owner(owner);
}
/*
- * Beware! Caller must be holding no references to clp->cl_sem!
+ * Close the current file.
*/
-void nfs4_close_state(struct nfs4_state *state, mode_t mode)
+static void __nfs4_close(struct path *path, struct nfs4_state *state, mode_t mode, int wait)
{
- struct inode *inode = state->inode;
struct nfs4_state_owner *owner = state->owner;
- struct nfs4_client *clp = owner->so_client;
+ int call_close = 0;
int newstate;
atomic_inc(&owner->so_count);
- down_read(&clp->cl_sem);
/* Protect against nfs4_find_state() */
- spin_lock(&inode->i_lock);
- if (mode & FMODE_READ)
- state->nreaders--;
- if (mode & FMODE_WRITE)
- state->nwriters--;
- if (state->nwriters == 0) {
- if (state->nreaders == 0)
- list_del_init(&state->inode_states);
- /* See reclaim code */
- list_move_tail(&state->open_states, &owner->so_states);
+ spin_lock(&owner->so_lock);
+ switch (mode & (FMODE_READ | FMODE_WRITE)) {
+ case FMODE_READ:
+ state->n_rdonly--;
+ break;
+ case FMODE_WRITE:
+ state->n_wronly--;
+ break;
+ case FMODE_READ|FMODE_WRITE:
+ state->n_rdwr--;
}
- spin_unlock(&inode->i_lock);
- newstate = 0;
- if (state->state != 0) {
- if (state->nreaders)
- newstate |= FMODE_READ;
- if (state->nwriters)
- newstate |= FMODE_WRITE;
- if (state->state == newstate)
- goto out;
- if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
- state->state = newstate;
- goto out;
+ newstate = FMODE_READ|FMODE_WRITE;
+ if (state->n_rdwr == 0) {
+ if (state->n_rdonly == 0) {
+ newstate &= ~FMODE_READ;
+ call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
+ call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
}
- if (nfs4_do_close(inode, state, newstate) == 0)
- return;
+ if (state->n_wronly == 0) {
+ newstate &= ~FMODE_WRITE;
+ call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
+ call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
+ }
+ if (newstate == 0)
+ clear_bit(NFS_DELEGATED_STATE, &state->flags);
}
-out:
- nfs4_put_open_state(state);
- nfs4_put_state_owner(owner);
- up_read(&clp->cl_sem);
+ nfs4_state_set_mode_locked(state, newstate);
+ spin_unlock(&owner->so_lock);
+
+ if (!call_close) {
+ nfs4_put_open_state(state);
+ nfs4_put_state_owner(owner);
+ } else
+ nfs4_do_close(path, state, wait);
+}
+
+void nfs4_close_state(struct path *path, struct nfs4_state *state, mode_t mode)
+{
+ __nfs4_close(path, state, mode, 0);
+}
+
+void nfs4_close_sync(struct path *path, struct nfs4_state *state, mode_t mode)
+{
+ __nfs4_close(path, state, mode, 1);
}
/*
static struct nfs4_lock_state *nfs4_alloc_lock_state(struct nfs4_state *state, fl_owner_t fl_owner)
{
struct nfs4_lock_state *lsp;
- struct nfs4_client *clp = state->owner->so_client;
+ struct nfs_client *clp = state->owner->so_client;
lsp = kzalloc(sizeof(*lsp), GFP_KERNEL);
if (lsp == NULL)
return NULL;
- lsp->ls_seqid.sequence = &state->owner->so_sequence;
+ rpc_init_wait_queue(&lsp->ls_sequence.wait, "lock_seqid_waitqueue");
+ spin_lock_init(&lsp->ls_sequence.lock);
+ INIT_LIST_HEAD(&lsp->ls_sequence.list);
+ lsp->ls_seqid.sequence = &lsp->ls_sequence;
atomic_set(&lsp->ls_count, 1);
lsp->ls_owner = fl_owner;
spin_lock(&clp->cl_lock);
- lsp->ls_id = nfs4_alloc_lockowner_id(clp);
+ nfs_alloc_unique_id(&clp->cl_lockowner_id, &lsp->ls_id, 1, 64);
spin_unlock(&clp->cl_lock);
INIT_LIST_HEAD(&lsp->ls_locks);
return lsp;
}
+static void nfs4_free_lock_state(struct nfs4_lock_state *lsp)
+{
+ struct nfs_client *clp = lsp->ls_state->owner->so_client;
+
+ spin_lock(&clp->cl_lock);
+ nfs_free_unique_id(&clp->cl_lockowner_id, &lsp->ls_id);
+ spin_unlock(&clp->cl_lock);
+ rpc_destroy_wait_queue(&lsp->ls_sequence.wait);
+ kfree(lsp);
+}
+
/*
* Return a compatible lock_state. If no initialized lock_state structure
* exists, return an uninitialized one.
*
- * The caller must be holding clp->cl_sem
*/
static struct nfs4_lock_state *nfs4_get_lock_state(struct nfs4_state *state, fl_owner_t owner)
{
return NULL;
}
spin_unlock(&state->state_lock);
- kfree(new);
+ if (new != NULL)
+ nfs4_free_lock_state(new);
return lsp;
}
* Release reference to lock_state, and free it if we see that
* it is no longer in use
*/
-static void nfs4_put_lock_state(struct nfs4_lock_state *lsp)
+void nfs4_put_lock_state(struct nfs4_lock_state *lsp)
{
struct nfs4_state *state;
if (list_empty(&state->lock_states))
clear_bit(LK_STATE_IN_USE, &state->flags);
spin_unlock(&state->state_lock);
- kfree(lsp);
+ nfs4_free_lock_state(lsp);
}
static void nfs4_fl_copy_lock(struct file_lock *dst, struct file_lock *src)
void nfs4_copy_stateid(nfs4_stateid *dst, struct nfs4_state *state, fl_owner_t fl_owner)
{
struct nfs4_lock_state *lsp;
+ int seq;
- memcpy(dst, &state->stateid, sizeof(*dst));
+ do {
+ seq = read_seqbegin(&state->seqlock);
+ memcpy(dst, &state->stateid, sizeof(*dst));
+ } while (read_seqretry(&state->seqlock, seq));
if (test_bit(LK_STATE_IN_USE, &state->flags) == 0)
return;
struct nfs_seqid *nfs_alloc_seqid(struct nfs_seqid_counter *counter)
{
- struct rpc_sequence *sequence = counter->sequence;
struct nfs_seqid *new;
new = kmalloc(sizeof(*new), GFP_KERNEL);
if (new != NULL) {
new->sequence = counter;
- new->task = NULL;
- spin_lock(&sequence->lock);
- list_add_tail(&new->list, &sequence->list);
- spin_unlock(&sequence->lock);
+ INIT_LIST_HEAD(&new->list);
}
return new;
}
void nfs_free_seqid(struct nfs_seqid *seqid)
{
- struct rpc_sequence *sequence = seqid->sequence->sequence;
- struct rpc_task *next = NULL;
+ if (!list_empty(&seqid->list)) {
+ struct rpc_sequence *sequence = seqid->sequence->sequence;
- spin_lock(&sequence->lock);
- list_del(&seqid->list);
- if (!list_empty(&sequence->list)) {
- next = list_entry(sequence->list.next, struct nfs_seqid, list)->task;
- if (next)
- rpc_wake_up_task(next);
+ spin_lock(&sequence->lock);
+ list_del(&seqid->list);
+ spin_unlock(&sequence->lock);
+ rpc_wake_up(&sequence->wait);
}
- spin_unlock(&sequence->lock);
kfree(seqid);
}
/*
- * Called with clp->cl_sem held.
- *
* Increment the seqid if the OPEN/OPEN_DOWNGRADE/CLOSE succeeded, or
* failed with a seqid incrementing error -
* see comments nfs_fs.h:seqid_mutating_error()
*/
-static inline void nfs_increment_seqid(int status, struct nfs_seqid *seqid)
+static void nfs_increment_seqid(int status, struct nfs_seqid *seqid)
{
+ BUG_ON(list_first_entry(&seqid->sequence->sequence->list, struct nfs_seqid, list) != seqid);
switch (status) {
case 0:
break;
case -NFS4ERR_BAD_SEQID:
+ if (seqid->sequence->flags & NFS_SEQID_CONFIRMED)
+ return;
+ printk(KERN_WARNING "NFS: v4 server returned a bad"
+ " sequence-id error on an"
+ " unconfirmed sequence %p!\n",
+ seqid->sequence);
case -NFS4ERR_STALE_CLIENTID:
case -NFS4ERR_STALE_STATEID:
case -NFS4ERR_BAD_STATEID:
struct nfs4_state_owner, so_seqid);
nfs4_drop_state_owner(sp);
}
- return nfs_increment_seqid(status, seqid);
+ nfs_increment_seqid(status, seqid);
}
/*
- * Called with clp->cl_sem held.
- *
* Increment the seqid if the LOCK/LOCKU succeeded, or
* failed with a seqid incrementing error -
* see comments nfs_fs.h:seqid_mutating_error()
*/
void nfs_increment_lock_seqid(int status, struct nfs_seqid *seqid)
{
- return nfs_increment_seqid(status, seqid);
+ nfs_increment_seqid(status, seqid);
}
int nfs_wait_on_sequence(struct nfs_seqid *seqid, struct rpc_task *task)
int status = 0;
spin_lock(&sequence->lock);
- if (sequence->list.next != &seqid->list) {
- seqid->task = task;
- rpc_sleep_on(&sequence->wait, task, NULL, NULL);
- status = -EAGAIN;
- }
+ if (list_empty(&seqid->list))
+ list_add_tail(&seqid->list, &sequence->list);
+ if (list_first_entry(&sequence->list, struct nfs_seqid, list) == seqid)
+ goto unlock;
+ rpc_sleep_on(&sequence->wait, task, NULL);
+ status = -EAGAIN;
+unlock:
spin_unlock(&sequence->lock);
return status;
}
static int reclaimer(void *);
-struct reclaimer_args {
- struct nfs4_client *clp;
- struct completion complete;
-};
+
+static inline void nfs4_clear_recover_bit(struct nfs_client *clp)
+{
+ smp_mb__before_clear_bit();
+ clear_bit(NFS4CLNT_STATE_RECOVER, &clp->cl_state);
+ smp_mb__after_clear_bit();
+ wake_up_bit(&clp->cl_state, NFS4CLNT_STATE_RECOVER);
+ rpc_wake_up(&clp->cl_rpcwaitq);
+}
/*
* State recovery routine
*/
-void
-nfs4_recover_state(void *data)
+static void nfs4_recover_state(struct nfs_client *clp)
{
- struct nfs4_client *clp = (struct nfs4_client *)data;
- struct reclaimer_args args = {
- .clp = clp,
- };
- might_sleep();
+ struct task_struct *task;
- init_completion(&args.complete);
-
- if (kernel_thread(reclaimer, &args, CLONE_KERNEL) < 0)
- goto out_failed_clear;
- wait_for_completion(&args.complete);
- return;
-out_failed_clear:
- set_bit(NFS4CLNT_OK, &clp->cl_state);
- wake_up_all(&clp->cl_waitq);
- rpc_wake_up(&clp->cl_rpcwaitq);
+ __module_get(THIS_MODULE);
+ atomic_inc(&clp->cl_count);
+ task = kthread_run(reclaimer, clp, "%s-reclaim",
+ rpc_peeraddr2str(clp->cl_rpcclient,
+ RPC_DISPLAY_ADDR));
+ if (!IS_ERR(task))
+ return;
+ nfs4_clear_recover_bit(clp);
+ nfs_put_client(clp);
+ module_put(THIS_MODULE);
}
/*
* Schedule a state recovery attempt
*/
-void
-nfs4_schedule_state_recovery(struct nfs4_client *clp)
+void nfs4_schedule_state_recovery(struct nfs_client *clp)
{
if (!clp)
return;
- if (test_and_clear_bit(NFS4CLNT_OK, &clp->cl_state))
- schedule_work(&clp->cl_recoverd);
+ if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state))
+ set_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state);
+ if (test_and_set_bit(NFS4CLNT_STATE_RECOVER, &clp->cl_state) == 0)
+ nfs4_recover_state(clp);
}
-static int nfs4_reclaim_locks(struct nfs4_state_recovery_ops *ops, struct nfs4_state *state)
+static int nfs4_state_mark_reclaim_reboot(struct nfs_client *clp, struct nfs4_state *state)
+{
+
+ set_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags);
+ /* Don't recover state that expired before the reboot */
+ if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) {
+ clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags);
+ return 0;
+ }
+ set_bit(NFS_OWNER_RECLAIM_REBOOT, &state->owner->so_flags);
+ set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state);
+ return 1;
+}
+
+int nfs4_state_mark_reclaim_nograce(struct nfs_client *clp, struct nfs4_state *state)
+{
+ set_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags);
+ clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags);
+ set_bit(NFS_OWNER_RECLAIM_NOGRACE, &state->owner->so_flags);
+ set_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state);
+ return 1;
+}
+
+static int nfs4_reclaim_locks(struct nfs4_state *state, const struct nfs4_state_recovery_ops *ops)
{
struct inode *inode = state->inode;
+ struct nfs_inode *nfsi = NFS_I(inode);
struct file_lock *fl;
int status = 0;
- for (fl = inode->i_flock; fl != 0; fl = fl->fl_next) {
- if (!(fl->fl_flags & FL_POSIX))
+ down_write(&nfsi->rwsem);
+ for (fl = inode->i_flock; fl != NULL; fl = fl->fl_next) {
+ if (!(fl->fl_flags & (FL_POSIX|FL_FLOCK)))
continue;
- if (((struct nfs_open_context *)fl->fl_file->private_data)->state != state)
+ if (nfs_file_open_context(fl->fl_file)->state != state)
continue;
status = ops->recover_lock(state, fl);
if (status >= 0)
switch (status) {
default:
printk(KERN_ERR "%s: unhandled error %d. Zeroing state\n",
- __FUNCTION__, status);
+ __func__, status);
case -NFS4ERR_EXPIRED:
case -NFS4ERR_NO_GRACE:
case -NFS4ERR_RECLAIM_BAD:
case -NFS4ERR_RECLAIM_CONFLICT:
- /* kill_proc(fl->fl_owner, SIGLOST, 1); */
+ /* kill_proc(fl->fl_pid, SIGLOST, 1); */
break;
case -NFS4ERR_STALE_CLIENTID:
goto out_err;
}
}
+ up_write(&nfsi->rwsem);
return 0;
out_err:
+ up_write(&nfsi->rwsem);
return status;
}
-static int nfs4_reclaim_open_state(struct nfs4_state_recovery_ops *ops, struct nfs4_state_owner *sp)
+static int nfs4_reclaim_open_state(struct nfs4_state_owner *sp, const struct nfs4_state_recovery_ops *ops)
{
struct nfs4_state *state;
struct nfs4_lock_state *lock;
* recovering after a network partition or a reboot from a
* server that doesn't support a grace period.
*/
+restart:
+ spin_lock(&sp->so_lock);
list_for_each_entry(state, &sp->so_states, open_states) {
+ if (!test_and_clear_bit(ops->state_flag_bit, &state->flags))
+ continue;
if (state->state == 0)
continue;
+ atomic_inc(&state->count);
+ spin_unlock(&sp->so_lock);
status = ops->recover_open(sp, state);
if (status >= 0) {
- status = nfs4_reclaim_locks(ops, state);
- if (status < 0)
- goto out_err;
- list_for_each_entry(lock, &state->lock_states, ls_locks) {
- if (!(lock->ls_flags & NFS_LOCK_INITIALIZED))
- printk("%s: Lock reclaim failed!\n",
- __FUNCTION__);
+ status = nfs4_reclaim_locks(state, ops);
+ if (status >= 0) {
+ list_for_each_entry(lock, &state->lock_states, ls_locks) {
+ if (!(lock->ls_flags & NFS_LOCK_INITIALIZED))
+ printk("%s: Lock reclaim failed!\n",
+ __func__);
+ }
+ nfs4_put_open_state(state);
+ goto restart;
}
- continue;
}
switch (status) {
default:
printk(KERN_ERR "%s: unhandled error %d. Zeroing state\n",
- __FUNCTION__, status);
+ __func__, status);
case -ENOENT:
- case -NFS4ERR_RECLAIM_BAD:
- case -NFS4ERR_RECLAIM_CONFLICT:
+ case -ESTALE:
/*
* Open state on this file cannot be recovered
* All we can do is revert to using the zero stateid.
/* Mark the file as being 'closed' */
state->state = 0;
break;
+ case -NFS4ERR_RECLAIM_BAD:
+ case -NFS4ERR_RECLAIM_CONFLICT:
+ nfs4_state_mark_reclaim_nograce(sp->so_client, state);
+ break;
case -NFS4ERR_EXPIRED:
case -NFS4ERR_NO_GRACE:
+ nfs4_state_mark_reclaim_nograce(sp->so_client, state);
case -NFS4ERR_STALE_CLIENTID:
goto out_err;
}
+ nfs4_put_open_state(state);
+ goto restart;
}
+ spin_unlock(&sp->so_lock);
return 0;
out_err:
+ nfs4_put_open_state(state);
return status;
}
-static void nfs4_state_mark_reclaim(struct nfs4_client *clp)
+static void nfs4_clear_open_state(struct nfs4_state *state)
+{
+ struct nfs4_lock_state *lock;
+
+ clear_bit(NFS_DELEGATED_STATE, &state->flags);
+ clear_bit(NFS_O_RDONLY_STATE, &state->flags);
+ clear_bit(NFS_O_WRONLY_STATE, &state->flags);
+ clear_bit(NFS_O_RDWR_STATE, &state->flags);
+ list_for_each_entry(lock, &state->lock_states, ls_locks) {
+ lock->ls_seqid.counter = 0;
+ lock->ls_seqid.flags = 0;
+ lock->ls_flags &= ~NFS_LOCK_INITIALIZED;
+ }
+}
+
+static void nfs4_state_mark_reclaim_helper(struct nfs_client *clp, int (*mark_reclaim)(struct nfs_client *clp, struct nfs4_state *state))
{
struct nfs4_state_owner *sp;
+ struct rb_node *pos;
struct nfs4_state *state;
- struct nfs4_lock_state *lock;
/* Reset all sequence ids to zero */
- list_for_each_entry(sp, &clp->cl_state_owners, so_list) {
+ 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);
sp->so_seqid.counter = 0;
sp->so_seqid.flags = 0;
+ spin_lock(&sp->so_lock);
list_for_each_entry(state, &sp->so_states, open_states) {
- list_for_each_entry(lock, &state->lock_states, ls_locks) {
- lock->ls_seqid.counter = 0;
- lock->ls_seqid.flags = 0;
- lock->ls_flags &= ~NFS_LOCK_INITIALIZED;
- }
+ if (mark_reclaim(clp, state))
+ nfs4_clear_open_state(state);
}
+ spin_unlock(&sp->so_lock);
}
}
-static int reclaimer(void *ptr)
+static void nfs4_state_start_reclaim_reboot(struct nfs_client *clp)
+{
+ /* Mark all delegations for reclaim */
+ nfs_delegation_mark_reclaim(clp);
+ nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_reboot);
+}
+
+static void nfs4_state_end_reclaim_reboot(struct nfs_client *clp)
{
- struct reclaimer_args *args = (struct reclaimer_args *)ptr;
- struct nfs4_client *clp = args->clp;
struct nfs4_state_owner *sp;
- struct nfs4_state_recovery_ops *ops;
- int status = 0;
+ struct rb_node *pos;
+ struct nfs4_state *state;
- daemonize("%u.%u.%u.%u-reclaim", NIPQUAD(clp->cl_addr));
- allow_signal(SIGKILL);
+ if (!test_and_clear_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state))
+ return;
- atomic_inc(&clp->cl_count);
- complete(&args->complete);
+ 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);
+ list_for_each_entry(state, &sp->so_states, open_states) {
+ if (!test_and_clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags))
+ continue;
+ nfs4_state_mark_reclaim_nograce(clp, state);
+ }
+ spin_unlock(&sp->so_lock);
+ }
- /* Ensure exclusive access to NFSv4 state */
- lock_kernel();
- down_write(&clp->cl_sem);
- /* Are there any NFS mounts out there? */
- if (list_empty(&clp->cl_superblocks))
- goto out;
-restart_loop:
- status = nfs4_proc_renew(clp);
- switch (status) {
- case 0:
+ nfs_delegation_reap_unclaimed(clp);
+}
+
+static void nfs_delegation_clear_all(struct nfs_client *clp)
+{
+ nfs_delegation_mark_reclaim(clp);
+ nfs_delegation_reap_unclaimed(clp);
+}
+
+static void nfs4_state_start_reclaim_nograce(struct nfs_client *clp)
+{
+ nfs_delegation_clear_all(clp);
+ 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)
+{
+ switch (error) {
case -NFS4ERR_CB_PATH_DOWN:
- goto out;
+ nfs_handle_cb_pathdown(clp);
+ break;
case -NFS4ERR_STALE_CLIENTID:
case -NFS4ERR_LEASE_MOVED:
- ops = &nfs4_reboot_recovery_ops;
+ set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
+ nfs4_state_start_reclaim_reboot(clp);
break;
- default:
- ops = &nfs4_network_partition_recovery_ops;
- };
- nfs4_state_mark_reclaim(clp);
- status = __nfs4_init_client(clp);
- if (status)
- goto out_error;
- /* Mark all delegations for reclaim */
- nfs_delegation_mark_reclaim(clp);
- /* Note: list is protected by exclusive lock on cl->cl_sem */
- list_for_each_entry(sp, &clp->cl_state_owners, so_list) {
- status = nfs4_reclaim_open_state(ops, sp);
+ case -NFS4ERR_EXPIRED:
+ set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
+ nfs4_state_start_reclaim_nograce(clp);
+ }
+}
+
+static int nfs4_do_reclaim(struct nfs_client *clp, const struct nfs4_state_recovery_ops *ops)
+{
+ struct rb_node *pos;
+ int status = 0;
+
+restart:
+ spin_lock(&clp->cl_lock);
+ for (pos = rb_first(&clp->cl_state_owners); pos != NULL; pos = rb_next(pos)) {
+ struct nfs4_state_owner *sp = rb_entry(pos, struct nfs4_state_owner, so_client_node);
+ if (!test_and_clear_bit(ops->owner_flag_bit, &sp->so_flags))
+ continue;
+ atomic_inc(&sp->so_count);
+ spin_unlock(&clp->cl_lock);
+ status = nfs4_reclaim_open_state(sp, ops);
if (status < 0) {
- if (status == -NFS4ERR_NO_GRACE) {
- ops = &nfs4_network_partition_recovery_ops;
- status = nfs4_reclaim_open_state(ops, sp);
+ set_bit(ops->owner_flag_bit, &sp->so_flags);
+ nfs4_put_state_owner(sp);
+ nfs4_recovery_handle_error(clp, status);
+ return status;
+ }
+ nfs4_put_state_owner(sp);
+ goto restart;
+ }
+ spin_unlock(&clp->cl_lock);
+ return status;
+}
+
+static int nfs4_check_lease(struct nfs_client *clp)
+{
+ struct rpc_cred *cred;
+ int status = -NFS4ERR_EXPIRED;
+
+ /* Is the client already known to have an expired lease? */
+ if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state))
+ return 0;
+ cred = nfs4_get_renew_cred(clp);
+ if (cred == NULL) {
+ cred = nfs4_get_setclientid_cred(clp);
+ if (cred == NULL)
+ goto out;
+ }
+ status = nfs4_proc_renew(clp, cred);
+ put_rpccred(cred);
+out:
+ nfs4_recovery_handle_error(clp, status);
+ return status;
+}
+
+static int nfs4_reclaim_lease(struct nfs_client *clp)
+{
+ struct rpc_cred *cred;
+ int status = -ENOENT;
+
+ cred = nfs4_get_setclientid_cred(clp);
+ if (cred != NULL) {
+ status = nfs4_init_client(clp, cred);
+ put_rpccred(cred);
+ /* Handle case where the user hasn't set up machine creds */
+ if (status == -EACCES && cred == clp->cl_machine_cred) {
+ nfs4_clear_machine_cred(clp);
+ status = -EAGAIN;
+ }
+ }
+ return status;
+}
+
+static int reclaimer(void *ptr)
+{
+ struct nfs_client *clp = ptr;
+ int status = 0;
+
+ allow_signal(SIGKILL);
+
+ /* Ensure exclusive access to NFSv4 state */
+ while (!list_empty(&clp->cl_superblocks)) {
+ if (test_and_clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) {
+ /* We're going to have to re-establish a clientid */
+ status = nfs4_reclaim_lease(clp);
+ if (status) {
+ set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
+ if (status == -EAGAIN)
+ continue;
+ goto out_error;
}
+ clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state);
+ }
+
+ if (test_and_clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state)) {
+ status = nfs4_check_lease(clp);
+ if (status != 0)
+ continue;
+ }
+
+ /* First recover reboot state... */
+ if (test_and_clear_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) {
+ status = nfs4_do_reclaim(clp, &nfs4_reboot_recovery_ops);
if (status == -NFS4ERR_STALE_CLIENTID)
- goto restart_loop;
- if (status == -NFS4ERR_EXPIRED)
- goto restart_loop;
+ continue;
+ nfs4_state_end_reclaim_reboot(clp);
+ continue;
}
+
+ /* Now recover expired state... */
+ if (test_and_clear_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) {
+ status = nfs4_do_reclaim(clp, &nfs4_nograce_recovery_ops);
+ if (status < 0) {
+ set_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state);
+ if (status == -NFS4ERR_STALE_CLIENTID)
+ continue;
+ if (status == -NFS4ERR_EXPIRED)
+ continue;
+ goto out_error;
+ } else
+ nfs4_state_end_reclaim_nograce(clp);
+ continue;
+ }
+
+ if (test_and_clear_bit(NFS4CLNT_DELEGRETURN, &clp->cl_state)) {
+ nfs_client_return_marked_delegations(clp);
+ continue;
+ }
+ break;
}
- nfs_delegation_reap_unclaimed(clp);
out:
- set_bit(NFS4CLNT_OK, &clp->cl_state);
- up_write(&clp->cl_sem);
- unlock_kernel();
- wake_up_all(&clp->cl_waitq);
- rpc_wake_up(&clp->cl_rpcwaitq);
- if (status == -NFS4ERR_CB_PATH_DOWN)
- nfs_handle_cb_pathdown(clp);
- nfs4_put_client(clp);
+ nfs4_clear_recover_bit(clp);
+ nfs_put_client(clp);
+ module_put_and_exit(0);
return 0;
out_error:
- printk(KERN_WARNING "Error: state recovery failed on NFSv4 server %u.%u.%u.%u with error %d\n",
- NIPQUAD(clp->cl_addr.s_addr), -status);
+ printk(KERN_WARNING "Error: state recovery 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);
goto out;
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff