diff options
author | Len Brown <len.brown@intel.com> | 2006-01-07 03:50:18 -0500 |
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committer | Len Brown <len.brown@intel.com> | 2006-01-07 03:50:18 -0500 |
commit | ed03f430cdc8c802652467e9097606fedc2c7abc (patch) | |
tree | 30941ec1e6f93e99358fefe18175e5dd800a4379 /fs/nfs/nfs4state.c | |
parent | ed349a8a0a780ed27e2a765f16cee54d9b63bfee (diff) | |
parent | 6f957eaf79356a32e838f5f262ee9a60544b1d5b (diff) | |
download | op-kernel-dev-ed03f430cdc8c802652467e9097606fedc2c7abc.zip op-kernel-dev-ed03f430cdc8c802652467e9097606fedc2c7abc.tar.gz |
Pull pnpacpi into acpica branch
Diffstat (limited to 'fs/nfs/nfs4state.c')
-rw-r--r-- | fs/nfs/nfs4state.c | 183 |
1 files changed, 104 insertions, 79 deletions
diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c index 5ef4c57..afad025 100644 --- a/fs/nfs/nfs4state.c +++ b/fs/nfs/nfs4state.c @@ -43,6 +43,8 @@ #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/workqueue.h> #include <linux/bitops.h> @@ -57,8 +59,6 @@ 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) { @@ -91,11 +91,10 @@ nfs4_alloc_client(struct in_addr *addr) if (nfs_callback_up() < 0) return NULL; - if ((clp = kmalloc(sizeof(*clp), GFP_KERNEL)) == NULL) { + if ((clp = kzalloc(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); @@ -103,14 +102,12 @@ nfs4_alloc_client(struct in_addr *addr) 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; + clp->cl_state = 1 << NFS4CLNT_LEASE_EXPIRED; return clp; } @@ -127,8 +124,6 @@ nfs4_free_client(struct nfs4_client *clp) 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); @@ -193,27 +188,22 @@ nfs4_put_client(struct nfs4_client *clp) 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); } -static int __nfs4_init_client(struct nfs4_client *clp) +static int nfs4_init_client(struct nfs4_client *clp, struct rpc_cred *cred) { - int status = nfs4_proc_setclientid(clp, NFS4_CALLBACK, nfs_callback_tcpport); + int status = nfs4_proc_setclientid(clp, NFS4_CALLBACK, + nfs_callback_tcpport, cred); if (status == 0) - status = nfs4_proc_setclientid_confirm(clp); + status = nfs4_proc_setclientid_confirm(clp, cred); if (status == 0) nfs4_schedule_state_renewal(clp); return status; } -int nfs4_init_client(struct nfs4_client *clp) -{ - return nfs4_map_errors(__nfs4_init_client(clp)); -} - u32 nfs4_alloc_lockowner_id(struct nfs4_client *clp) { @@ -235,6 +225,32 @@ nfs4_client_grab_unused(struct nfs4_client *clp, struct rpc_cred *cred) return sp; } +struct rpc_cred *nfs4_get_renew_cred(struct nfs4_client *clp) +{ + struct nfs4_state_owner *sp; + struct rpc_cred *cred = NULL; + + list_for_each_entry(sp, &clp->cl_state_owners, so_list) { + if (list_empty(&sp->so_states)) + continue; + cred = get_rpccred(sp->so_cred); + break; + } + return cred; +} + +struct rpc_cred *nfs4_get_setclientid_cred(struct nfs4_client *clp) +{ + struct nfs4_state_owner *sp; + + if (!list_empty(&clp->cl_state_owners)) { + sp = list_entry(clp->cl_state_owners.next, + struct nfs4_state_owner, so_list); + return get_rpccred(sp->so_cred); + } + return NULL; +} + static struct nfs4_state_owner * nfs4_find_state_owner(struct nfs4_client *clp, struct rpc_cred *cred) { @@ -349,14 +365,9 @@ nfs4_alloc_open_state(void) { 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); @@ -475,15 +486,23 @@ void nfs4_close_state(struct nfs4_state *state, mode_t mode) /* Protect against nfs4_find_state() */ spin_lock(&owner->so_lock); spin_lock(&inode->i_lock); - if (mode & FMODE_READ) - state->nreaders--; - if (mode & FMODE_WRITE) - state->nwriters--; + 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--; + } oldstate = newstate = state->state; - if (state->nreaders == 0) - newstate &= ~FMODE_READ; - if (state->nwriters == 0) - newstate &= ~FMODE_WRITE; + if (state->n_rdwr == 0) { + if (state->n_rdonly == 0) + newstate &= ~FMODE_READ; + if (state->n_wronly == 0) + newstate &= ~FMODE_WRITE; + } if (test_bit(NFS_DELEGATED_STATE, &state->flags)) { nfs4_state_set_mode_locked(state, newstate); oldstate = newstate; @@ -733,45 +752,43 @@ out: } static int reclaimer(void *); -struct reclaimer_args { - struct nfs4_client *clp; - struct completion complete; -}; + +static inline void nfs4_clear_recover_bit(struct nfs4_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 nfs4_client *clp) { - struct nfs4_client *clp = (struct nfs4_client *)data; - struct reclaimer_args args = { - .clp = clp, - }; - might_sleep(); - - init_completion(&args.complete); + struct task_struct *task; - 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, "%u.%u.%u.%u-reclaim", + NIPQUAD(clp->cl_addr)); + if (!IS_ERR(task)) + return; + nfs4_clear_recover_bit(clp); + nfs4_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 nfs4_client *clp) { if (!clp) return; - if (test_and_clear_bit(NFS4CLNT_OK, &clp->cl_state)) - schedule_work(&clp->cl_recoverd); + 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) @@ -887,18 +904,14 @@ static void nfs4_state_mark_reclaim(struct nfs4_client *clp) static int reclaimer(void *ptr) { - struct reclaimer_args *args = (struct reclaimer_args *)ptr; - struct nfs4_client *clp = args->clp; + struct nfs4_client *clp = ptr; struct nfs4_state_owner *sp; struct nfs4_state_recovery_ops *ops; + struct rpc_cred *cred; int status = 0; - daemonize("%u.%u.%u.%u-reclaim", NIPQUAD(clp->cl_addr)); allow_signal(SIGKILL); - atomic_inc(&clp->cl_count); - complete(&args->complete); - /* Ensure exclusive access to NFSv4 state */ lock_kernel(); down_write(&clp->cl_sem); @@ -906,20 +919,33 @@ static int reclaimer(void *ptr) if (list_empty(&clp->cl_superblocks)) goto out; restart_loop: - status = nfs4_proc_renew(clp); - switch (status) { - case 0: - case -NFS4ERR_CB_PATH_DOWN: - goto out; - case -NFS4ERR_STALE_CLIENTID: - case -NFS4ERR_LEASE_MOVED: - ops = &nfs4_reboot_recovery_ops; - break; - default: - ops = &nfs4_network_partition_recovery_ops; - }; + ops = &nfs4_network_partition_recovery_ops; + /* Are there any open files on this volume? */ + cred = nfs4_get_renew_cred(clp); + if (cred != NULL) { + /* Yes there are: try to renew the old lease */ + status = nfs4_proc_renew(clp, cred); + switch (status) { + case 0: + case -NFS4ERR_CB_PATH_DOWN: + put_rpccred(cred); + goto out; + case -NFS4ERR_STALE_CLIENTID: + case -NFS4ERR_LEASE_MOVED: + ops = &nfs4_reboot_recovery_ops; + } + } else { + /* "reboot" to ensure we clear all state on the server */ + clp->cl_boot_time = CURRENT_TIME; + cred = nfs4_get_setclientid_cred(clp); + } + /* We're going to have to re-establish a clientid */ nfs4_state_mark_reclaim(clp); - status = __nfs4_init_client(clp); + status = -ENOENT; + if (cred != NULL) { + status = nfs4_init_client(clp, cred); + put_rpccred(cred); + } if (status) goto out_error; /* Mark all delegations for reclaim */ @@ -940,14 +966,13 @@ restart_loop: } 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_clear_recover_bit(clp); nfs4_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", |