diff options
Diffstat (limited to 'fs')
40 files changed, 2342 insertions, 1672 deletions
@@ -1555,6 +1555,7 @@ config RPCSEC_GSS_SPKM3 select CRYPTO select CRYPTO_MD5 select CRYPTO_DES + select CRYPTO_CAST5 help Provides for secure RPC calls by means of a gss-api mechanism based on the SPKM3 public-key mechanism. diff --git a/fs/lockd/clntlock.c b/fs/lockd/clntlock.c index da6354b..bce7444 100644 --- a/fs/lockd/clntlock.c +++ b/fs/lockd/clntlock.c @@ -44,32 +44,25 @@ static LIST_HEAD(nlm_blocked); /* * Queue up a lock for blocking so that the GRANTED request can see it */ -int nlmclnt_prepare_block(struct nlm_rqst *req, struct nlm_host *host, struct file_lock *fl) +struct nlm_wait *nlmclnt_prepare_block(struct nlm_host *host, struct file_lock *fl) { struct nlm_wait *block; - BUG_ON(req->a_block != NULL); block = kmalloc(sizeof(*block), GFP_KERNEL); - if (block == NULL) - return -ENOMEM; - block->b_host = host; - block->b_lock = fl; - init_waitqueue_head(&block->b_wait); - block->b_status = NLM_LCK_BLOCKED; - - list_add(&block->b_list, &nlm_blocked); - req->a_block = block; - - return 0; + if (block != NULL) { + block->b_host = host; + block->b_lock = fl; + init_waitqueue_head(&block->b_wait); + block->b_status = NLM_LCK_BLOCKED; + list_add(&block->b_list, &nlm_blocked); + } + return block; } -void nlmclnt_finish_block(struct nlm_rqst *req) +void nlmclnt_finish_block(struct nlm_wait *block) { - struct nlm_wait *block = req->a_block; - if (block == NULL) return; - req->a_block = NULL; list_del(&block->b_list); kfree(block); } @@ -77,15 +70,14 @@ void nlmclnt_finish_block(struct nlm_rqst *req) /* * Block on a lock */ -long nlmclnt_block(struct nlm_rqst *req, long timeout) +int nlmclnt_block(struct nlm_wait *block, struct nlm_rqst *req, long timeout) { - struct nlm_wait *block = req->a_block; long ret; /* A borken server might ask us to block even if we didn't * request it. Just say no! */ - if (!req->a_args.block) + if (block == NULL) return -EAGAIN; /* Go to sleep waiting for GRANT callback. Some servers seem @@ -99,13 +91,10 @@ long nlmclnt_block(struct nlm_rqst *req, long timeout) ret = wait_event_interruptible_timeout(block->b_wait, block->b_status != NLM_LCK_BLOCKED, timeout); - - if (block->b_status != NLM_LCK_BLOCKED) { - req->a_res.status = block->b_status; - block->b_status = NLM_LCK_BLOCKED; - } - - return ret; + if (ret < 0) + return -ERESTARTSYS; + req->a_res.status = block->b_status; + return 0; } /* @@ -125,7 +114,15 @@ u32 nlmclnt_grant(const struct sockaddr_in *addr, const struct nlm_lock *lock) list_for_each_entry(block, &nlm_blocked, b_list) { struct file_lock *fl_blocked = block->b_lock; - if (!nlm_compare_locks(fl_blocked, fl)) + if (fl_blocked->fl_start != fl->fl_start) + continue; + if (fl_blocked->fl_end != fl->fl_end) + continue; + /* + * Careful! The NLM server will return the 32-bit "pid" that + * we put on the wire: in this case the lockowner "pid". + */ + if (fl_blocked->fl_u.nfs_fl.owner->pid != lock->svid) continue; if (!nlm_cmp_addr(&block->b_host->h_addr, addr)) continue; @@ -147,34 +144,6 @@ u32 nlmclnt_grant(const struct sockaddr_in *addr, const struct nlm_lock *lock) */ /* - * Mark the locks for reclaiming. - * FIXME: In 2.5 we don't want to iterate through any global file_lock_list. - * Maintain NLM lock reclaiming lists in the nlm_host instead. - */ -static -void nlmclnt_mark_reclaim(struct nlm_host *host) -{ - struct file_lock *fl; - struct inode *inode; - struct list_head *tmp; - - list_for_each(tmp, &file_lock_list) { - fl = list_entry(tmp, struct file_lock, fl_link); - - inode = fl->fl_file->f_dentry->d_inode; - if (inode->i_sb->s_magic != NFS_SUPER_MAGIC) - continue; - if (fl->fl_u.nfs_fl.owner == NULL) - continue; - if (fl->fl_u.nfs_fl.owner->host != host) - continue; - if (!(fl->fl_u.nfs_fl.flags & NFS_LCK_GRANTED)) - continue; - fl->fl_u.nfs_fl.flags |= NFS_LCK_RECLAIM; - } -} - -/* * Someone has sent us an SM_NOTIFY. Ensure we bind to the new port number, * that we mark locks for reclaiming, and that we bump the pseudo NSM state. */ @@ -186,7 +155,12 @@ void nlmclnt_prepare_reclaim(struct nlm_host *host, u32 newstate) host->h_state++; host->h_nextrebind = 0; nlm_rebind_host(host); - nlmclnt_mark_reclaim(host); + + /* + * Mark the locks for reclaiming. + */ + list_splice_init(&host->h_granted, &host->h_reclaim); + dprintk("NLM: reclaiming locks for host %s", host->h_name); } @@ -215,9 +189,7 @@ reclaimer(void *ptr) { struct nlm_host *host = (struct nlm_host *) ptr; struct nlm_wait *block; - struct list_head *tmp; - struct file_lock *fl; - struct inode *inode; + struct file_lock *fl, *next; daemonize("%s-reclaim", host->h_name); allow_signal(SIGKILL); @@ -229,23 +201,13 @@ reclaimer(void *ptr) /* First, reclaim all locks that have been marked. */ restart: - list_for_each(tmp, &file_lock_list) { - fl = list_entry(tmp, struct file_lock, fl_link); + list_for_each_entry_safe(fl, next, &host->h_reclaim, fl_u.nfs_fl.list) { + list_del_init(&fl->fl_u.nfs_fl.list); - inode = fl->fl_file->f_dentry->d_inode; - if (inode->i_sb->s_magic != NFS_SUPER_MAGIC) - continue; - if (fl->fl_u.nfs_fl.owner == NULL) - continue; - if (fl->fl_u.nfs_fl.owner->host != host) - continue; - if (!(fl->fl_u.nfs_fl.flags & NFS_LCK_RECLAIM)) - continue; - - fl->fl_u.nfs_fl.flags &= ~NFS_LCK_RECLAIM; - nlmclnt_reclaim(host, fl); if (signalled()) - break; + continue; + if (nlmclnt_reclaim(host, fl) == 0) + list_add_tail(&fl->fl_u.nfs_fl.list, &host->h_granted); goto restart; } diff --git a/fs/lockd/clntproc.c b/fs/lockd/clntproc.c index 970b6a6..f96e381 100644 --- a/fs/lockd/clntproc.c +++ b/fs/lockd/clntproc.c @@ -132,59 +132,18 @@ static void nlmclnt_setlockargs(struct nlm_rqst *req, struct file_lock *fl) memcpy(&lock->fh, NFS_FH(fl->fl_file->f_dentry->d_inode), sizeof(struct nfs_fh)); lock->caller = system_utsname.nodename; lock->oh.data = req->a_owner; - lock->oh.len = sprintf(req->a_owner, "%d@%s", - current->pid, system_utsname.nodename); - locks_copy_lock(&lock->fl, fl); + lock->oh.len = snprintf(req->a_owner, sizeof(req->a_owner), "%u@%s", + (unsigned int)fl->fl_u.nfs_fl.owner->pid, + system_utsname.nodename); + lock->svid = fl->fl_u.nfs_fl.owner->pid; + lock->fl.fl_start = fl->fl_start; + lock->fl.fl_end = fl->fl_end; + lock->fl.fl_type = fl->fl_type; } static void nlmclnt_release_lockargs(struct nlm_rqst *req) { - struct file_lock *fl = &req->a_args.lock.fl; - - if (fl->fl_ops && fl->fl_ops->fl_release_private) - fl->fl_ops->fl_release_private(fl); -} - -/* - * Initialize arguments for GRANTED call. The nlm_rqst structure - * has been cleared already. - */ -int -nlmclnt_setgrantargs(struct nlm_rqst *call, struct nlm_lock *lock) -{ - locks_copy_lock(&call->a_args.lock.fl, &lock->fl); - memcpy(&call->a_args.lock.fh, &lock->fh, sizeof(call->a_args.lock.fh)); - call->a_args.lock.caller = system_utsname.nodename; - call->a_args.lock.oh.len = lock->oh.len; - - /* set default data area */ - call->a_args.lock.oh.data = call->a_owner; - - if (lock->oh.len > NLMCLNT_OHSIZE) { - void *data = kmalloc(lock->oh.len, GFP_KERNEL); - if (!data) { - nlmclnt_freegrantargs(call); - return 0; - } - call->a_args.lock.oh.data = (u8 *) data; - } - - memcpy(call->a_args.lock.oh.data, lock->oh.data, lock->oh.len); - return 1; -} - -void -nlmclnt_freegrantargs(struct nlm_rqst *call) -{ - struct file_lock *fl = &call->a_args.lock.fl; - /* - * Check whether we allocated memory for the owner. - */ - if (call->a_args.lock.oh.data != (u8 *) call->a_owner) { - kfree(call->a_args.lock.oh.data); - } - if (fl->fl_ops && fl->fl_ops->fl_release_private) - fl->fl_ops->fl_release_private(fl); + BUG_ON(req->a_args.lock.fl.fl_ops != NULL); } /* @@ -193,9 +152,8 @@ nlmclnt_freegrantargs(struct nlm_rqst *call) int nlmclnt_proc(struct inode *inode, int cmd, struct file_lock *fl) { - struct nfs_server *nfssrv = NFS_SERVER(inode); struct nlm_host *host; - struct nlm_rqst reqst, *call = &reqst; + struct nlm_rqst *call; sigset_t oldset; unsigned long flags; int status, proto, vers; @@ -209,23 +167,17 @@ nlmclnt_proc(struct inode *inode, int cmd, struct file_lock *fl) /* Retrieve transport protocol from NFS client */ proto = NFS_CLIENT(inode)->cl_xprt->prot; - if (!(host = nlmclnt_lookup_host(NFS_ADDR(inode), proto, vers))) + host = nlmclnt_lookup_host(NFS_ADDR(inode), proto, vers); + if (host == NULL) return -ENOLCK; - /* Create RPC client handle if not there, and copy soft - * and intr flags from NFS client. */ - if (host->h_rpcclnt == NULL) { - struct rpc_clnt *clnt; + call = nlm_alloc_call(host); + if (call == NULL) + return -ENOMEM; - /* Bind an rpc client to this host handle (does not - * perform a portmapper lookup) */ - if (!(clnt = nlm_bind_host(host))) { - status = -ENOLCK; - goto done; - } - clnt->cl_softrtry = nfssrv->client->cl_softrtry; - clnt->cl_intr = nfssrv->client->cl_intr; - } + nlmclnt_locks_init_private(fl, host); + /* Set up the argument struct */ + nlmclnt_setlockargs(call, fl); /* Keep the old signal mask */ spin_lock_irqsave(¤t->sighand->siglock, flags); @@ -238,26 +190,10 @@ nlmclnt_proc(struct inode *inode, int cmd, struct file_lock *fl) && (current->flags & PF_EXITING)) { sigfillset(¤t->blocked); /* Mask all signals */ recalc_sigpending(); - spin_unlock_irqrestore(¤t->sighand->siglock, flags); - call = nlmclnt_alloc_call(); - if (!call) { - status = -ENOMEM; - goto out_restore; - } call->a_flags = RPC_TASK_ASYNC; - } else { - spin_unlock_irqrestore(¤t->sighand->siglock, flags); - memset(call, 0, sizeof(*call)); - locks_init_lock(&call->a_args.lock.fl); - locks_init_lock(&call->a_res.lock.fl); } - call->a_host = host; - - nlmclnt_locks_init_private(fl, host); - - /* Set up the argument struct */ - nlmclnt_setlockargs(call, fl); + spin_unlock_irqrestore(¤t->sighand->siglock, flags); if (IS_SETLK(cmd) || IS_SETLKW(cmd)) { if (fl->fl_type != F_UNLCK) { @@ -270,41 +206,58 @@ nlmclnt_proc(struct inode *inode, int cmd, struct file_lock *fl) else status = -EINVAL; - out_restore: + fl->fl_ops->fl_release_private(fl); + fl->fl_ops = NULL; + spin_lock_irqsave(¤t->sighand->siglock, flags); current->blocked = oldset; recalc_sigpending(); spin_unlock_irqrestore(¤t->sighand->siglock, flags); -done: dprintk("lockd: clnt proc returns %d\n", status); - nlm_release_host(host); return status; } EXPORT_SYMBOL(nlmclnt_proc); /* * Allocate an NLM RPC call struct + * + * Note: the caller must hold a reference to host. In case of failure, + * this reference will be released. */ -struct nlm_rqst * -nlmclnt_alloc_call(void) +struct nlm_rqst *nlm_alloc_call(struct nlm_host *host) { struct nlm_rqst *call; - while (!signalled()) { - call = (struct nlm_rqst *) kmalloc(sizeof(struct nlm_rqst), GFP_KERNEL); - if (call) { - memset(call, 0, sizeof(*call)); + for(;;) { + call = kzalloc(sizeof(*call), GFP_KERNEL); + if (call != NULL) { locks_init_lock(&call->a_args.lock.fl); locks_init_lock(&call->a_res.lock.fl); + call->a_host = host; return call; } - printk("nlmclnt_alloc_call: failed, waiting for memory\n"); + if (signalled()) + break; + printk("nlm_alloc_call: failed, waiting for memory\n"); schedule_timeout_interruptible(5*HZ); } + nlm_release_host(host); return NULL; } +void nlm_release_call(struct nlm_rqst *call) +{ + nlm_release_host(call->a_host); + nlmclnt_release_lockargs(call); + kfree(call); +} + +static void nlmclnt_rpc_release(void *data) +{ + return nlm_release_call(data); +} + static int nlm_wait_on_grace(wait_queue_head_t *queue) { DEFINE_WAIT(wait); @@ -401,57 +354,45 @@ in_grace_period: /* * Generic NLM call, async version. */ -int nlmsvc_async_call(struct nlm_rqst *req, u32 proc, const struct rpc_call_ops *tk_ops) +static int __nlm_async_call(struct nlm_rqst *req, u32 proc, struct rpc_message *msg, const struct rpc_call_ops *tk_ops) { struct nlm_host *host = req->a_host; struct rpc_clnt *clnt; - struct rpc_message msg = { - .rpc_argp = &req->a_args, - .rpc_resp = &req->a_res, - }; - int status; + int status = -ENOLCK; dprintk("lockd: call procedure %d on %s (async)\n", (int)proc, host->h_name); /* If we have no RPC client yet, create one. */ - if ((clnt = nlm_bind_host(host)) == NULL) - return -ENOLCK; - msg.rpc_proc = &clnt->cl_procinfo[proc]; + clnt = nlm_bind_host(host); + if (clnt == NULL) + goto out_err; + msg->rpc_proc = &clnt->cl_procinfo[proc]; /* bootstrap and kick off the async RPC call */ - status = rpc_call_async(clnt, &msg, RPC_TASK_ASYNC, tk_ops, req); - + status = rpc_call_async(clnt, msg, RPC_TASK_ASYNC, tk_ops, req); + if (status == 0) + return 0; +out_err: + nlm_release_call(req); return status; } -static int nlmclnt_async_call(struct nlm_rqst *req, u32 proc, const struct rpc_call_ops *tk_ops) +int nlm_async_call(struct nlm_rqst *req, u32 proc, const struct rpc_call_ops *tk_ops) { - struct nlm_host *host = req->a_host; - struct rpc_clnt *clnt; - struct nlm_args *argp = &req->a_args; - struct nlm_res *resp = &req->a_res; struct rpc_message msg = { - .rpc_argp = argp, - .rpc_resp = resp, + .rpc_argp = &req->a_args, + .rpc_resp = &req->a_res, }; - int status; - - dprintk("lockd: call procedure %d on %s (async)\n", - (int)proc, host->h_name); - - /* If we have no RPC client yet, create one. */ - if ((clnt = nlm_bind_host(host)) == NULL) - return -ENOLCK; - msg.rpc_proc = &clnt->cl_procinfo[proc]; + return __nlm_async_call(req, proc, &msg, tk_ops); +} - /* Increment host refcount */ - nlm_get_host(host); - /* bootstrap and kick off the async RPC call */ - status = rpc_call_async(clnt, &msg, RPC_TASK_ASYNC, tk_ops, req); - if (status < 0) - nlm_release_host(host); - return status; +int nlm_async_reply(struct nlm_rqst *req, u32 proc, const struct rpc_call_ops *tk_ops) +{ + struct rpc_message msg = { + .rpc_argp = &req->a_res, + }; + return __nlm_async_call(req, proc, &msg, tk_ops); } /* @@ -463,36 +404,41 @@ nlmclnt_test(struct nlm_rqst *req, struct file_lock *fl) int status; status = nlmclnt_call(req, NLMPROC_TEST); - nlmclnt_release_lockargs(req); if (status < 0) - return status; + goto out; - status = req->a_res.status; - if (status == NLM_LCK_GRANTED) { - fl->fl_type = F_UNLCK; - } if (status == NLM_LCK_DENIED) { - /* - * Report the conflicting lock back to the application. - */ - locks_copy_lock(fl, &req->a_res.lock.fl); - fl->fl_pid = 0; - } else { - return nlm_stat_to_errno(req->a_res.status); + switch (req->a_res.status) { + case NLM_LCK_GRANTED: + fl->fl_type = F_UNLCK; + break; + case NLM_LCK_DENIED: + /* + * Report the conflicting lock back to the application. + */ + fl->fl_start = req->a_res.lock.fl.fl_start; + fl->fl_end = req->a_res.lock.fl.fl_start; + fl->fl_type = req->a_res.lock.fl.fl_type; + fl->fl_pid = 0; + break; + default: + status = nlm_stat_to_errno(req->a_res.status); } - - return 0; +out: + nlm_release_call(req); + return status; } static void nlmclnt_locks_copy_lock(struct file_lock *new, struct file_lock *fl) { - memcpy(&new->fl_u.nfs_fl, &fl->fl_u.nfs_fl, sizeof(new->fl_u.nfs_fl)); - nlm_get_lockowner(new->fl_u.nfs_fl.owner); + new->fl_u.nfs_fl.state = fl->fl_u.nfs_fl.state; + new->fl_u.nfs_fl.owner = nlm_get_lockowner(fl->fl_u.nfs_fl.owner); + list_add_tail(&new->fl_u.nfs_fl.list, &fl->fl_u.nfs_fl.owner->host->h_granted); } static void nlmclnt_locks_release_private(struct file_lock *fl) { + list_del(&fl->fl_u.nfs_fl.list); nlm_put_lockowner(fl->fl_u.nfs_fl.owner); - fl->fl_ops = NULL; } static struct file_lock_operations nlmclnt_lock_ops = { @@ -504,8 +450,8 @@ static void nlmclnt_locks_init_private(struct file_lock *fl, struct nlm_host *ho { BUG_ON(fl->fl_ops != NULL); fl->fl_u.nfs_fl.state = 0; - fl->fl_u.nfs_fl.flags = 0; fl->fl_u.nfs_fl.owner = nlm_find_lockowner(host, fl->fl_owner); + INIT_LIST_HEAD(&fl->fl_u.nfs_fl.list); fl->fl_ops = &nlmclnt_lock_ops; } @@ -552,57 +498,52 @@ nlmclnt_lock(struct nlm_rqst *req, struct file_lock *fl) { struct nlm_host *host = req->a_host; struct nlm_res *resp = &req->a_res; - long timeout; - int status; + struct nlm_wait *block = NULL; + int status = -ENOLCK; if (!host->h_monitored && nsm_monitor(host) < 0) { printk(KERN_NOTICE "lockd: failed to monitor %s\n", host->h_name); - status = -ENOLCK; goto out; } - if (req->a_args.block) { - status = nlmclnt_prepare_block(req, host, fl); - if (status < 0) - goto out; - } + block = nlmclnt_prepare_block(host, fl); for(;;) { status = nlmclnt_call(req, NLMPROC_LOCK); if (status < 0) goto out_unblock; - if (resp->status != NLM_LCK_BLOCKED) + if (!req->a_args.block) break; - /* Wait on an NLM blocking lock */ - timeout = nlmclnt_block(req, NLMCLNT_POLL_TIMEOUT); /* Did a reclaimer thread notify us of a server reboot? */ if (resp->status == NLM_LCK_DENIED_GRACE_PERIOD) continue; if (resp->status != NLM_LCK_BLOCKED) break; - if (timeout >= 0) - continue; - /* We were interrupted. Send a CANCEL request to the server + /* Wait on an NLM blocking lock */ + status = nlmclnt_block(block, req, NLMCLNT_POLL_TIMEOUT); + /* if we were interrupted. Send a CANCEL request to the server * and exit */ - status = (int)timeout; - goto out_unblock; + if (status < 0) + goto out_unblock; + if (resp->status != NLM_LCK_BLOCKED) + break; } if (resp->status == NLM_LCK_GRANTED) { fl->fl_u.nfs_fl.state = host->h_state; - fl->fl_u.nfs_fl.flags |= NFS_LCK_GRANTED; fl->fl_flags |= FL_SLEEP; + /* Ensure the resulting lock will get added to granted list */ do_vfs_lock(fl); } status = nlm_stat_to_errno(resp->status); out_unblock: - nlmclnt_finish_block(req); + nlmclnt_finish_block(block); /* Cancel the blocked request if it is still pending */ if (resp->status == NLM_LCK_BLOCKED) nlmclnt_cancel(host, req->a_args.block, fl); out: - nlmclnt_release_lockargs(req); + nlm_release_call(req); return status; } @@ -658,10 +599,6 @@ nlmclnt_unlock(struct nlm_rqst *req, struct file_lock *fl) struct nlm_res *resp = &req->a_res; int status; - /* Clean the GRANTED flag now so the lock doesn't get - * reclaimed while we're stuck in the unlock call. */ - fl->fl_u.nfs_fl.flags &= ~NFS_LCK_GRANTED; - /* * Note: the server is supposed to either grant us the unlock * request, or to deny it with NLM_LCK_DENIED_GRACE_PERIOD. In either @@ -669,32 +606,24 @@ nlmclnt_unlock(struct nlm_rqst *req, struct file_lock *fl) */ do_vfs_lock(fl); - if (req->a_flags & RPC_TASK_ASYNC) { - status = nlmclnt_async_call(req, NLMPROC_UNLOCK, - &nlmclnt_unlock_ops); - /* Hrmf... Do the unlock early since locks_remove_posix() - * really expects us to free the lock synchronously */ - if (status < 0) { - nlmclnt_release_lockargs(req); - kfree(req); - } - return status; - } + if (req->a_flags & RPC_TASK_ASYNC) + return nlm_async_call(req, NLMPROC_UNLOCK, &nlmclnt_unlock_ops); status = nlmclnt_call(req, NLMPROC_UNLOCK); - nlmclnt_release_lockargs(req); if (status < 0) - return status; + goto out; + status = 0; if (resp->status == NLM_LCK_GRANTED) - return 0; + goto out; if (resp->status != NLM_LCK_DENIED_NOLOCKS) printk("lockd: unexpected unlock status: %d\n", resp->status); - /* What to do now? I'm out of my depth... */ - - return -ENOLCK; + status = -ENOLCK; +out: + nlm_release_call(req); + return status; } static void nlmclnt_unlock_callback(struct rpc_task *task, void *data) @@ -716,9 +645,6 @@ static void nlmclnt_unlock_callback(struct rpc_task *task, void *data) if (status != NLM_LCK_GRANTED) printk(KERN_WARNING "lockd: unexpected unlock status: %d\n", status); die: - nlm_release_host(req->a_host); - nlmclnt_release_lockargs(req); - kfree(req); return; retry_rebind: nlm_rebind_host(req->a_host); @@ -728,6 +654,7 @@ die: static const struct rpc_call_ops nlmclnt_unlock_ops = { .rpc_call_done = nlmclnt_unlock_callback, + .rpc_release = nlmclnt_rpc_release, }; /* @@ -749,20 +676,15 @@ static int nlmclnt_cancel(struct nlm_host *host, int block, struct file_lock *fl recalc_sigpending(); spin_unlock_irqrestore(¤t->sighand->siglock, flags); - req = nlmclnt_alloc_call(); + req = nlm_alloc_call(nlm_get_host(host)); if (!req) return -ENOMEM; - req->a_host = host; req->a_flags = RPC_TASK_ASYNC; nlmclnt_setlockargs(req, fl); req->a_args.block = block; - status = nlmclnt_async_call(req, NLMPROC_CANCEL, &nlmclnt_cancel_ops); - if (status < 0) { - nlmclnt_release_lockargs(req); - kfree(req); - } + status = nlm_async_call(req, NLMPROC_CANCEL, &nlmclnt_cancel_ops); spin_lock_irqsave(¤t->sighand->siglock, flags); current->blocked = oldset; @@ -791,6 +713,7 @@ static void nlmclnt_cancel_callback(struct rpc_task *task, void *data) switch (req->a_res.status) { case NLM_LCK_GRANTED: case NLM_LCK_DENIED_GRACE_PERIOD: + case NLM_LCK_DENIED: /* Everything's good */ break; case NLM_LCK_DENIED_NOLOCKS: @@ -802,9 +725,6 @@ static void nlmclnt_cancel_callback(struct rpc_task *task, void *data) } die: - nlm_release_host(req->a_host); - nlmclnt_release_lockargs(req); - kfree(req); return; retry_cancel: @@ -818,6 +738,7 @@ retry_cancel: static const struct rpc_call_ops nlmclnt_cancel_ops = { .rpc_call_done = nlmclnt_cancel_callback, + .rpc_release = nlmclnt_rpc_release, }; /* diff --git a/fs/lockd/host.c b/fs/lockd/host.c index 82f7a0b..112ebf8 100644 --- a/fs/lockd/host.c +++ b/fs/lockd/host.c @@ -123,6 +123,8 @@ nlm_lookup_host(int server, struct sockaddr_in *sin, nlm_hosts[hash] = host; INIT_LIST_HEAD(&host->h_lockowners); spin_lock_init(&host->h_lock); + INIT_LIST_HEAD(&host->h_granted); + INIT_LIST_HEAD(&host->h_reclaim); if (++nrhosts > NLM_HOST_MAX) next_gc = 0; @@ -191,11 +193,12 @@ nlm_bind_host(struct nlm_host *host) xprt->resvport = 1; /* NLM requires a reserved port */ /* Existing NLM servers accept AUTH_UNIX only */ - clnt = rpc_create_client(xprt, host->h_name, &nlm_program, + clnt = rpc_new_client(xprt, host->h_name, &nlm_program, host->h_version, RPC_AUTH_UNIX); if (IS_ERR(clnt)) goto forgetit; clnt->cl_autobind = 1; /* turn on pmap queries */ + clnt->cl_softrtry = 1; /* All queries are soft */ host->h_rpcclnt = clnt; } @@ -242,8 +245,12 @@ void nlm_release_host(struct nlm_host *host) { if (host != NULL) { dprintk("lockd: release host %s\n", host->h_name); - atomic_dec(&host->h_count); BUG_ON(atomic_read(&host->h_count) < 0); + if (atomic_dec_and_test(&host->h_count)) { + BUG_ON(!list_empty(&host->h_lockowners)); + BUG_ON(!list_empty(&host->h_granted)); + BUG_ON(!list_empty(&host->h_reclaim)); + } } } @@ -331,7 +338,6 @@ nlm_gc_hosts(void) rpc_destroy_client(host->h_rpcclnt); } } - BUG_ON(!list_empty(&host->h_lockowners)); kfree(host); nrhosts--; } diff --git a/fs/lockd/mon.c b/fs/lockd/mon.c index a89cb8a..3fc683f 100644 --- a/fs/lockd/mon.c +++ b/fs/lockd/mon.c @@ -35,6 +35,10 @@ nsm_mon_unmon(struct nlm_host *host, u32 proc, struct nsm_res *res) struct rpc_clnt *clnt; int status; struct nsm_args args; + struct rpc_message msg = { + .rpc_argp = &args, + .rpc_resp = res, + }; clnt = nsm_create(); if (IS_ERR(clnt)) { @@ -49,7 +53,8 @@ nsm_mon_unmon(struct nlm_host *host, u32 proc, struct nsm_res *res) args.proc = NLMPROC_NSM_NOTIFY; memset(res, 0, sizeof(*res)); - status = rpc_call(clnt, proc, &args, res, 0); + msg.rpc_proc = &clnt->cl_procinfo[proc]; + status = rpc_call_sync(clnt, &msg, 0); if (status < 0) printk(KERN_DEBUG "nsm_mon_unmon: rpc failed, status=%d\n", status); @@ -214,12 +219,16 @@ static struct rpc_procinfo nsm_procedures[] = { .p_encode = (kxdrproc_t) xdr_encode_mon, .p_decode = (kxdrproc_t) xdr_decode_stat_res, .p_bufsiz = MAX(SM_mon_sz, SM_monres_sz) << 2, + .p_statidx = SM_MON, + .p_name = "MONITOR", }, [SM_UNMON] = { .p_proc = SM_UNMON, .p_encode = (kxdrproc_t) xdr_encode_unmon, .p_decode = (kxdrproc_t) xdr_decode_stat, .p_bufsiz = MAX(SM_mon_id_sz, SM_unmonres_sz) << 2, + .p_statidx = SM_UNMON, + .p_name = "UNMONITOR", }, }; diff --git a/fs/lockd/svc4proc.c b/fs/lockd/svc4proc.c index b10f913..a2dd9cc 100644 --- a/fs/lockd/svc4proc.c +++ b/fs/lockd/svc4proc.c @@ -21,10 +21,6 @@ #define NLMDBG_FACILITY NLMDBG_CLIENT -static u32 nlm4svc_callback(struct svc_rqst *, u32, struct nlm_res *); - -static const struct rpc_call_ops nlm4svc_callback_ops; - /* * Obtain client and file from arguments */ @@ -234,83 +230,89 @@ nlm4svc_proc_granted(struct svc_rqst *rqstp, struct nlm_args *argp, } /* + * This is the generic lockd callback for async RPC calls + */ +static void nlm4svc_callback_exit(struct rpc_task *task, void *data) +{ + dprintk("lockd: %4d callback returned %d\n", task->tk_pid, + -task->tk_status); +} + +static void nlm4svc_callback_release(void *data) +{ + nlm_release_call(data); +} + +static const struct rpc_call_ops nlm4svc_callback_ops = { + .rpc_call_done = nlm4svc_callback_exit, + .rpc_release = nlm4svc_callback_release, +}; + +/* * `Async' versions of the above service routines. They aren't really, * because we send the callback before the reply proper. I hope this * doesn't break any clients. */ -static int -nlm4svc_proc_test_msg(struct svc_rqst *rqstp, struct nlm_args *argp, - void *resp) +static int nlm4svc_callback(struct svc_rqst *rqstp, u32 proc, struct nlm_args *argp, + int (*func)(struct svc_rqst *, struct nlm_args *, struct nlm_res *)) { - struct nlm_res res; - u32 stat; + struct nlm_host *host; + struct nlm_rqst *call; + int stat; - dprintk("lockd: TEST_MSG called\n"); - memset(&res, 0, sizeof(res)); + host = nlmsvc_lookup_host(rqstp); + if (host == NULL) + return rpc_system_err; + + call = nlm_alloc_call(host); + if (call == NULL) + return rpc_system_err; - if ((stat = nlm4svc_proc_test(rqstp, argp, &res)) == 0) - stat = nlm4svc_callback(rqstp, NLMPROC_TEST_RES, &res); - return stat; + stat = func(rqstp, argp, &call->a_res); + if (stat != 0) { + nlm_release_call(call); + return stat; + } + + call->a_flags = RPC_TASK_ASYNC; + if (nlm_async_reply(call, proc, &nlm4svc_callback_ops) < 0) + return rpc_system_err; + return rpc_success; } -static int -nlm4svc_proc_lock_msg(struct svc_rqst *rqstp, struct nlm_args *argp, +static int nlm4svc_proc_test_msg(struct svc_rqst *rqstp, struct nlm_args *argp, void *resp) { - struct nlm_res res; - u32 stat; + dprintk("lockd: TEST_MSG called\n"); + return nlm4svc_callback(rqstp, NLMPROC_TEST_RES, argp, nlm4svc_proc_test); +} +static int nlm4svc_proc_lock_msg(struct svc_rqst *rqstp, struct nlm_args *argp, + void *resp) +{ dprintk("lockd: LOCK_MSG called\n"); - memset(&res, 0, sizeof(res)); - - if ((stat = nlm4svc_proc_lock(rqstp, argp, &res)) == 0) - stat = nlm4svc_callback(rqstp, NLMPROC_LOCK_RES, &res); - return stat; + return nlm4svc_callback(rqstp, NLMPROC_LOCK_RES, argp, nlm4svc_proc_lock); } -static int -nlm4svc_proc_cancel_msg(struct svc_rqst *rqstp, struct nlm_args *argp, +static int nlm4svc_proc_cancel_msg(struct svc_rqst *rqstp, struct nlm_args *argp, void *resp) { - struct nlm_res res; - u32 stat; - dprintk("lockd: CANCEL_MSG called\n"); - memset(&res, 0, sizeof(res)); - - if ((stat = nlm4svc_proc_cancel(rqstp, argp, &res)) == 0) - stat = nlm4svc_callback(rqstp, NLMPROC_CANCEL_RES, &res); - return stat; + return nlm4svc_callback(rqstp, NLMPROC_CANCEL_RES, argp, nlm4svc_proc_cancel); } -static int -nlm4svc_proc_unlock_msg(struct svc_rqst *rqstp, struct nlm_args *argp, +static int nlm4svc_proc_unlock_msg(struct svc_rqst *rqstp, struct nlm_args *argp, void *resp) { - struct nlm_res res; - u32 stat; - dprintk("lockd: UNLOCK_MSG called\n"); - memset(&res, 0, sizeof(res)); - - if ((stat = nlm4svc_proc_unlock(rqstp, argp, &res)) == 0) - stat = nlm4svc_callback(rqstp, NLMPROC_UNLOCK_RES, &res); - return stat; + return nlm4svc_callback(rqstp, NLMPROC_UNLOCK_RES, argp, nlm4svc_proc_unlock); } -static int -nlm4svc_proc_granted_msg(struct svc_rqst *rqstp, struct nlm_args *argp, +static int nlm4svc_proc_granted_msg(struct svc_rqst *rqstp, struct nlm_args *argp, void *resp) { - struct nlm_res res; - u32 stat; - dprintk("lockd: GRANTED_MSG called\n"); - memset(&res, 0, sizeof(res)); - - if ((stat = nlm4svc_proc_granted(rqstp, argp, &res)) == 0) - stat = nlm4svc_callback(rqstp, NLMPROC_GRANTED_RES, &res); - return stat; + return nlm4svc_callback(rqstp, NLMPROC_GRANTED_RES, argp, nlm4svc_proc_granted); } /* @@ -472,55 +474,6 @@ nlm4svc_proc_granted_res(struct svc_rqst *rqstp, struct nlm_res *argp, /* - * This is the generic lockd callback for async RPC calls - */ -static u32 -nlm4svc_callback(struct svc_rqst *rqstp, u32 proc, struct nlm_res *resp) -{ - struct nlm_host *host; - struct nlm_rqst *call; - - if (!(call = nlmclnt_alloc_call())) - return rpc_system_err; - - host = nlmclnt_lookup_host(&rqstp->rq_addr, - rqstp->rq_prot, rqstp->rq_vers); - if (!host) { - kfree(call); - return rpc_system_err; - } - - call->a_flags = RPC_TASK_ASYNC; - call->a_host = host; - memcpy(&call->a_args, resp, sizeof(*resp)); - - if (nlmsvc_async_call(call, proc, &nlm4svc_callback_ops) < 0) - goto error; - - return rpc_success; - error: - kfree(call); - nlm_release_host(host); - return rpc_system_err; -} - -static void nlm4svc_callback_exit(struct rpc_task *task, void *data) -{ - struct nlm_rqst *call = data; - - if (task->tk_status < 0) { - dprintk("lockd: %4d callback failed (errno = %d)\n", - task->tk_pid, -task->tk_status); - } - nlm_release_host(call->a_host); - kfree(call); -} - -static const struct rpc_call_ops nlm4svc_callback_ops = { - .rpc_call_done = nlm4svc_callback_exit, -}; - -/* * NLM Server procedures. */ diff --git a/fs/lockd/svclock.c b/fs/lockd/svclock.c index 9cfced6..d2b66ba 100644 --- a/fs/lockd/svclock.c +++ b/fs/lockd/svclock.c @@ -39,9 +39,12 @@ #define nlm_deadlock nlm_lck_denied #endif +static void nlmsvc_release_block(struct nlm_block *block); static void nlmsvc_insert_block(struct nlm_block *block, unsigned long); static int nlmsvc_remove_block(struct nlm_block *block); +static int nlmsvc_setgrantargs(struct nlm_rqst *call, struct nlm_lock *lock); +static void nlmsvc_freegrantargs(struct nlm_rqst *call); static const struct rpc_call_ops nlmsvc_grant_ops; /* @@ -58,6 +61,7 @@ nlmsvc_insert_block(struct nlm_block *block, unsigned long when) struct nlm_block **bp, *b; dprintk("lockd: nlmsvc_insert_block(%p, %ld)\n", block, when); + kref_get(&block->b_count); if (block->b_queued) nlmsvc_remove_block(block); bp = &nlm_blocked; @@ -90,6 +94,7 @@ nlmsvc_remove_block(struct nlm_block *block) if (b == block) { *bp = block->b_next; block->b_queued = 0; + nlmsvc_release_block(block); return 1; } } @@ -98,11 +103,10 @@ nlmsvc_remove_block(struct nlm_block *block) } /* - * Find a block for a given lock and optionally remove it from - * the list. + * Find a block for a given lock */ static struct nlm_block * -nlmsvc_lookup_block(struct nlm_file *file, struct nlm_lock *lock, int remove) +nlmsvc_lookup_block(struct nlm_file *file, struct nlm_lock *lock) { struct nlm_block **head, *block; struct file_lock *fl; @@ -112,17 +116,14 @@ nlmsvc_lookup_block(struct nlm_file *file, struct nlm_lock *lock, int remove) (long long)lock->fl.fl_start, (long long)lock->fl.fl_end, lock->fl.fl_type); for (head = &nlm_blocked; (block = *head) != 0; head = &block->b_next) { - fl = &block->b_call.a_args.lock.fl; + fl = &block->b_call->a_args.lock.fl; dprintk("lockd: check f=%p pd=%d %Ld-%Ld ty=%d cookie=%s\n", block->b_file, fl->fl_pid, (long long)fl->fl_start, (long long)fl->fl_end, fl->fl_type, - nlmdbg_cookie2a(&block->b_call.a_args.cookie)); + nlmdbg_cookie2a(&block->b_call->a_args.cookie)); if (block->b_file == file && nlm_compare_locks(fl, &lock->fl)) { - if (remove) { - *head = block->b_next; - block->b_queued = 0; - } + kref_get(&block->b_count); return block; } } @@ -150,11 +151,13 @@ nlmsvc_find_block(struct nlm_cookie *cookie, struct sockaddr_in *sin) for (block = nlm_blocked; block; block = block->b_next) { dprintk("cookie: head of blocked queue %p, block %p\n", nlm_blocked, block); - if (nlm_cookie_match(&block->b_call.a_args.cookie,cookie) + if (nlm_cookie_match(&block->b_call->a_args.cookie,cookie) && nlm_cmp_addr(sin, &block->b_host->h_addr)) break; } + if (block != NULL) + kref_get(&block->b_count); return block; } @@ -174,27 +177,30 @@ nlmsvc_create_block(struct svc_rqst *rqstp, struct nlm_file *file, { struct nlm_block *block; struct nlm_host *host; - struct nlm_rqst *call; + struct nlm_rqst *call = NULL; /* Create host handle for callback */ - host = nlmclnt_lookup_host(&rqstp->rq_addr, - rqstp->rq_prot, rqstp->rq_vers); + host = nlmsvc_lookup_host(rqstp); if (host == NULL) return NULL; + call = nlm_alloc_call(host); + if (call == NULL) + return NULL; + /* Allocate memory for block, and initialize arguments */ - if (!(block = (struct nlm_block *) kmalloc(sizeof(*block), GFP_KERNEL))) + block = kzalloc(sizeof(*block), GFP_KERNEL); + if (block == NULL) goto failed; - memset(block, 0, sizeof(*block)); - locks_init_lock(&block->b_call.a_args.lock.fl); - locks_init_lock(&block->b_call.a_res.lock.fl); + kref_init(&block->b_count); - if (!nlmclnt_setgrantargs(&block->b_call, lock)) + if (!nlmsvc_setgrantargs(call, lock)) goto failed_free; /* Set notifier function for VFS, and init args */ - block->b_call.a_args.lock.fl.fl_lmops = &nlmsvc_lock_operations; - block->b_call.a_args.cookie = *cookie; /* see above */ + call->a_args.lock.fl.fl_flags |= FL_SLEEP; + call->a_args.lock.fl.fl_lmops = &nlmsvc_lock_operations; + call->a_args.cookie = *cookie; /* see above */ dprintk("lockd: created block %p...\n", block); @@ -202,22 +208,23 @@ nlmsvc_create_block(struct svc_rqst *rqstp, struct nlm_file *file, block->b_daemon = rqstp->rq_server; block->b_host = host; block->b_file = file; + file->f_count++; /* Add to file's list of blocks */ block->b_fnext = file->f_blocks; file->f_blocks = block; /* Set up RPC arguments for callback */ - call = &block->b_call; - call->a_host = host; + block->b_call = call; call->a_flags = RPC_TASK_ASYNC; + call->a_block = block; return block; failed_free: kfree(block); failed: - nlm_release_host(host); + nlm_release_call(call); return NULL; } @@ -227,29 +234,26 @@ failed: * It is the caller's responsibility to check whether the file * can be closed hereafter. */ -static int -nlmsvc_delete_block(struct nlm_block *block, int unlock) +static int nlmsvc_unlink_block(struct nlm_block *block) { - struct file_lock *fl = &block->b_call.a_args.lock.fl; - struct nlm_file *file = block->b_file; - struct nlm_block **bp; - int status = 0; - - dprintk("lockd: deleting block %p...\n", block); + int status; + dprintk("lockd: unlinking block %p...\n", block); /* Remove block from list */ + status = posix_unblock_lock(block->b_file->f_file, &block->b_call->a_args.lock.fl); nlmsvc_remove_block(block); - if (unlock) - status = posix_unblock_lock(file->f_file, fl); + return status; +} - /* If the block is in the middle of a GRANT callback, - * don't kill it yet. */ - if (block->b_incall) { - nlmsvc_insert_block(block, NLM_NEVER); - block->b_done = 1; - return status; - } +static void nlmsvc_free_block(struct kref *kref) +{ + struct nlm_block *block = container_of(kref, struct nlm_block, b_count); + struct nlm_file *file = block->b_file; + struct nlm_block **bp; + dprintk("lockd: freeing block %p...\n", block); + + down(&file->f_sema); /* Remove block from file's list of blocks */ for (bp = &file->f_blocks; *bp; bp = &(*bp)->b_fnext) { if (*bp == block) { @@ -257,36 +261,93 @@ nlmsvc_delete_block(struct nlm_block *block, int unlock) break; } } + up(&file->f_sema); - if (block->b_host) - nlm_release_host(block->b_host); - nlmclnt_freegrantargs(&block->b_call); + nlmsvc_freegrantargs(block->b_call); + nlm_release_call(block->b_call); + nlm_release_file(block->b_file); kfree(block); - return status; +} + +static void nlmsvc_release_block(struct nlm_block *block) +{ + if (block != NULL) + kref_put(&block->b_count, nlmsvc_free_block); +} + +static void nlmsvc_act_mark(struct nlm_host *host, struct nlm_file *file) +{ + struct nlm_block *block; + + down(&file->f_sema); + for (block = file->f_blocks; block != NULL; block = block->b_fnext) + block->b_host->h_inuse = 1; + up(&file->f_sema); +} + +static void nlmsvc_act_unlock(struct nlm_host *host, struct nlm_file *file) +{ + struct nlm_block *block; + +restart: + down(&file->f_sema); + for (block = file->f_blocks; block != NULL; block = block->b_fnext) { + if (host != NULL && host != block->b_host) + continue; + if (!block->b_queued) + continue; + kref_get(&block->b_count); + up(&file->f_sema); + nlmsvc_unlink_block(block); + nlmsvc_release_block(block); + goto restart; + } + up(&file->f_sema); } /* * Loop over all blocks and perform the action specified. * (NLM_ACT_CHECK handled by nlmsvc_inspect_file). */ -int +void nlmsvc_traverse_blocks(struct nlm_host *host, struct nlm_file *file, int action) { - struct nlm_block *block, *next; - /* XXX: Will everything get cleaned up if we don't unlock here? */ + if (action == NLM_ACT_MARK) + nlmsvc_act_mark(host, file); + else + nlmsvc_act_unlock(host, file); +} - down(&file->f_sema); - for (block = file->f_blocks; block; block = next) { - next = block->b_fnext; - if (action == NLM_ACT_MARK) - block->b_host->h_inuse = 1; - else if (action == NLM_ACT_UNLOCK) { - if (host == NULL || host == block->b_host) - nlmsvc_delete_block(block, 1); - } +/* + * Initialize arguments for GRANTED call. The nlm_rqst structure + * has been cleared already. + */ +static int nlmsvc_setgrantargs(struct nlm_rqst *call, struct nlm_lock *lock) +{ + locks_copy_lock(&call->a_args.lock.fl, &lock->fl); + memcpy(&call->a_args.lock.fh, &lock->fh, sizeof(call->a_args.lock.fh)); + call->a_args.lock.caller = system_utsname.nodename; + call->a_args.lock.oh.len = lock->oh.len; + + /* set default data area */ + call->a_args.lock.oh.data = call->a_owner; + call->a_args.lock.svid = lock->fl.fl_pid; + + if (lock->oh.len > NLMCLNT_OHSIZE) { + void *data = kmalloc(lock->oh.len, GFP_KERNEL); + if (!data) + return 0; + call->a_args.lock.oh.data = (u8 *) data; } - up(&file->f_sema); - return 0; + + memcpy(call->a_args.lock.oh.data, lock->oh.data, lock->oh.len); + return 1; +} + +static void nlmsvc_freegrantargs(struct nlm_rqst *call) +{ + if (call->a_args.lock.oh.data != call->a_owner) + kfree(call->a_args.lock.oh.data); } /* @@ -297,9 +358,9 @@ u32 nlmsvc_lock(struct svc_rqst *rqstp, struct nlm_file *file, struct nlm_lock *lock, int wait, struct nlm_cookie *cookie) { - struct file_lock *conflock; - struct nlm_block *block; + struct nlm_block *block, *newblock = NULL; int error; + u32 ret; dprintk("lockd: nlmsvc_lock(%s/%ld, ty=%d, pi=%d, %Ld-%Ld, bl=%d)\n", file->f_file->f_dentry->d_inode->i_sb->s_id, @@ -310,69 +371,65 @@ nlmsvc_lock(struct svc_rqst *rqstp, struct nlm_file *file, wait); - /* Get existing block (in case client is busy-waiting) */ - block = nlmsvc_lookup_block(file, lock, 0); - - lock->fl.fl_flags |= FL_LOCKD; - + lock->fl.fl_flags &= ~FL_SLEEP; again: /* Lock file against concurrent access */ down(&file->f_sema); + /* Get existing block (in case client is busy-waiting) */ + block = nlmsvc_lookup_block(file, lock); + if (block == NULL) { + if (newblock != NULL) + lock = &newblock->b_call->a_args.lock; + } else + lock = &block->b_call->a_args.lock; - if (!(conflock = posix_test_lock(file->f_file, &lock->fl))) { - error = posix_lock_file(file->f_file, &lock->fl); + error = posix_lock_file(file->f_file, &lock->fl); + lock->fl.fl_flags &= ~FL_SLEEP; - if (block) - nlmsvc_delete_block(block, 0); - up(&file->f_sema); + dprintk("lockd: posix_lock_file returned %d\n", error); - dprintk("lockd: posix_lock_file returned %d\n", -error); - switch(-error) { + switch(error) { case 0: - return nlm_granted; - case EDEADLK: - return nlm_deadlock; - case EAGAIN: - return nlm_lck_denied; + ret = nlm_granted; + goto out; + case -EAGAIN: + break; + case -EDEADLK: + ret = nlm_deadlock; + goto out; default: /* includes ENOLCK */ - return nlm_lck_denied_nolocks; - } + ret = nlm_lck_denied_nolocks; + goto out; } - if (!wait) { - up(&file->f_sema); - return nlm_lck_denied; - } + ret = nlm_lck_denied; + if (!wait) + goto out; - if (posix_locks_deadlock(&lock->fl, conflock)) { - up(&file->f_sema); - return nlm_deadlock; - } + ret = nlm_lck_blocked; + if (block != NULL) + goto out; /* If we don't have a block, create and initialize it. Then * retry because we may have slept in kmalloc. */ /* We have to release f_sema as nlmsvc_create_block may try to * to claim it while doing host garbage collection */ - if (block == NULL) { + if (newblock == NULL) { up(&file->f_sema); dprintk("lockd: blocking on this lock (allocating).\n"); - if (!(block = nlmsvc_create_block(rqstp, file, lock, cookie))) + if (!(newblock = nlmsvc_create_block(rqstp, file, lock, cookie))) return nlm_lck_denied_nolocks; goto again; } /* Append to list of blocked */ - nlmsvc_insert_block(block, NLM_NEVER); - - if (list_empty(&block->b_call.a_args.lock.fl.fl_block)) { - /* Now add block to block list of the conflicting lock - if we haven't done so. */ - dprintk("lockd: blocking on this lock.\n"); - posix_block_lock(conflock, &block->b_call.a_args.lock.fl); - } - + nlmsvc_insert_block(newblock, NLM_NEVER); +out: up(&file->f_sema); - return nlm_lck_blocked; + nlmsvc_release_block(newblock); + nlmsvc_release_block(block); + dprintk("lockd: nlmsvc_lock returned %u\n", ret); + return ret; } /* @@ -382,8 +439,6 @@ u32 nlmsvc_testlock(struct nlm_file *file, struct nlm_lock *lock, struct nlm_lock *conflock) { - struct file_lock *fl; - dprintk("lockd: nlmsvc_testlock(%s/%ld, ty=%d, %Ld-%Ld)\n", file->f_file->f_dentry->d_inode->i_sb->s_id, file->f_file->f_dentry->d_inode->i_ino, @@ -391,13 +446,14 @@ nlmsvc_testlock(struct nlm_file *file, struct nlm_lock *lock, (long long)lock->fl.fl_start, (long long)lock->fl.fl_end); - if ((fl = posix_test_lock(file->f_file, &lock->fl)) != NULL) { + if (posix_test_lock(file->f_file, &lock->fl, &conflock->fl)) { dprintk("lockd: conflicting lock(ty=%d, %Ld-%Ld)\n", - fl->fl_type, (long long)fl->fl_start, - (long long)fl->fl_end); + conflock->fl.fl_type, + (long long)conflock->fl.fl_start, + (long long)conflock->fl.fl_end); conflock->caller = "somehost"; /* FIXME */ conflock->oh.len = 0; /* don't return OH info */ - conflock->fl = *fl; + conflock->svid = conflock->fl.fl_pid; return nlm_lck_denied; } @@ -453,9 +509,12 @@ nlmsvc_cancel_blocked(struct nlm_file *file, struct nlm_lock *lock) (long long)lock->fl.fl_end); down(&file->f_sema); - if ((block = nlmsvc_lookup_block(file, lock, 1)) != NULL) - status = nlmsvc_delete_block(block, 1); + block = nlmsvc_lookup_block(file, lock); up(&file->f_sema); + if (block != NULL) { + status = nlmsvc_unlink_block(block); + nlmsvc_release_block(block); + } return status ? nlm_lck_denied : nlm_granted; } @@ -473,7 +532,7 @@ nlmsvc_notify_blocked(struct file_lock *fl) dprintk("lockd: VFS unblock notification for block %p\n", fl); for (bp = &nlm_blocked; (block = *bp) != 0; bp = &block->b_next) { - if (nlm_compare_locks(&block->b_call.a_args.lock.fl, fl)) { + if (nlm_compare_locks(&block->b_call->a_args.lock.fl, fl)) { nlmsvc_insert_block(block, 0); svc_wake_up(block->b_daemon); return; @@ -508,17 +567,13 @@ static void nlmsvc_grant_blocked(struct nlm_block *block) { struct nlm_file *file = block->b_file; - struct nlm_lock *lock = &block->b_call.a_args.lock; - struct file_lock *conflock; + struct nlm_lock *lock = &block->b_call->a_args.lock; int error; dprintk("lockd: grant blocked lock %p\n", block); - /* First thing is lock the file */ - down(&file->f_sema); - /* Unlink block request from list */ - nlmsvc_remove_block(block); + nlmsvc_unlink_block(block); /* If b_granted is true this means we've been here before. * Just retry the grant callback, possibly refreshing the RPC @@ -529,24 +584,21 @@ nlmsvc_grant_blocked(struct nlm_block *block) } /* Try the lock operation again */ - if ((conflock = posix_test_lock(file->f_file, &lock->fl)) != NULL) { - /* Bummer, we blocked again */ + lock->fl.fl_flags |= FL_SLEEP; + error = posix_lock_file(file->f_file, &lock->fl); + lock->fl.fl_flags &= ~FL_SLEEP; + + switch (error) { + case 0: + break; + case -EAGAIN: dprintk("lockd: lock still blocked\n"); nlmsvc_insert_block(block, NLM_NEVER); - posix_block_lock(conflock, &lock->fl); - up(&file->f_sema); return; - } - - /* Alright, no conflicting lock. Now lock it for real. If the - * following yields an error, this is most probably due to low - * memory. Retry the lock in a few seconds. - */ - if ((error = posix_lock_file(file->f_file, &lock->fl)) < 0) { + default: printk(KERN_WARNING "lockd: unexpected error %d in %s!\n", -error, __FUNCTION__); nlmsvc_insert_block(block, 10 * HZ); - up(&file->f_sema); return; } @@ -554,17 +606,15 @@ callback: /* Lock was granted by VFS. */ dprintk("lockd: GRANTing blocked lock.\n"); block->b_granted = 1; - block->b_incall = 1; /* Schedule next grant callback in 30 seconds */ nlmsvc_insert_block(block, 30 * HZ); /* Call the client */ - nlm_get_host(block->b_call.a_host); - if (nlmsvc_async_call(&block->b_call, NLMPROC_GRANTED_MSG, + kref_get(&block->b_count); + if (nlm_async_call(block->b_call, NLMPROC_GRANTED_MSG, &nlmsvc_grant_ops) < 0) - nlm_release_host(block->b_call.a_host); - up(&file->f_sema); + nlmsvc_release_block(block); } /* @@ -578,20 +628,10 @@ callback: static void nlmsvc_grant_callback(struct rpc_task *task, void *data) { struct nlm_rqst *call = data; - struct nlm_block *block; + struct nlm_block *block = call->a_block; unsigned long timeout; - struct sockaddr_in *peer_addr = RPC_PEERADDR(task->tk_client); dprintk("lockd: GRANT_MSG RPC callback\n"); - dprintk("callback: looking for cookie %s, host (%u.%u.%u.%u)\n", - nlmdbg_cookie2a(&call->a_args.cookie), - NIPQUAD(peer_addr->sin_addr.s_addr)); - if (!(block = nlmsvc_find_block(&call->a_args.cookie, peer_addr))) { - dprintk("lockd: no block for cookie %s, host (%u.%u.%u.%u)\n", - nlmdbg_cookie2a(&call->a_args.cookie), - NIPQUAD(peer_addr->sin_addr.s_addr)); - return; - } /* Technically, we should down the file semaphore here. Since we * move the block towards the head of the queue only, no harm @@ -608,13 +648,18 @@ static void nlmsvc_grant_callback(struct rpc_task *task, void *data) } nlmsvc_insert_block(block, timeout); svc_wake_up(block->b_daemon); - block->b_incall = 0; +} - nlm_release_host(call->a_host); +void nlmsvc_grant_release(void *data) +{ + struct nlm_rqst *call = data; + + nlmsvc_release_block(call->a_block); } static const struct rpc_call_ops nlmsvc_grant_ops = { .rpc_call_done = nlmsvc_grant_callback, + .rpc_release = nlmsvc_grant_release, }; /* @@ -634,25 +679,17 @@ nlmsvc_grant_reply(struct svc_rqst *rqstp, struct nlm_cookie *cookie, u32 status return; file = block->b_file; - file->f_count++; - down(&file->f_sema); - block = nlmsvc_find_block(cookie, &rqstp->rq_addr); if (block) { if (status == NLM_LCK_DENIED_GRACE_PERIOD) { /* Try again in a couple of seconds */ nlmsvc_insert_block(block, 10 * HZ); - up(&file->f_sema); } else { /* Lock is now held by client, or has been rejected. * In both cases, the block should be removed. */ - up(&file->f_sema); - if (status == NLM_LCK_GRANTED) - nlmsvc_delete_block(block, 0); - else - nlmsvc_delete_block(block, 1); + nlmsvc_unlink_block(block); } } - nlm_release_file(file); + nlmsvc_release_block(block); } /* @@ -675,10 +712,12 @@ nlmsvc_retry_blocked(void) break; dprintk("nlmsvc_retry_blocked(%p, when=%ld, done=%d)\n", block, block->b_when, block->b_done); + kref_get(&block->b_count); if (block->b_done) - nlmsvc_delete_block(block, 0); + nlmsvc_unlink_block(block); else nlmsvc_grant_blocked(block); + nlmsvc_release_block(block); } if ((block = nlm_blocked) && block->b_when != NLM_NEVER) diff --git a/fs/lockd/svcproc.c b/fs/lockd/svcproc.c index 35681d9..d210cf3 100644 --- a/fs/lockd/svcproc.c +++ b/fs/lockd/svcproc.c @@ -22,10 +22,6 @@ #define NLMDBG_FACILITY NLMDBG_CLIENT -static u32 nlmsvc_callback(struct svc_rqst *, u32, struct nlm_res *); - -static const struct rpc_call_ops nlmsvc_callback_ops; - #ifdef CONFIG_LOCKD_V4 static u32 cast_to_nlm(u32 status, u32 vers) @@ -262,83 +258,91 @@ nlmsvc_proc_granted(struct svc_rqst *rqstp, struct nlm_args *argp, } /* + * This is the generic lockd callback for async RPC calls + */ +static void nlmsvc_callback_exit(struct rpc_task *task, void *data) +{ + dprintk("lockd: %4d callback returned %d\n", task->tk_pid, + -task->tk_status); +} + +static void nlmsvc_callback_release(void *data) +{ + nlm_release_call(data); +} + +static const struct rpc_call_ops nlmsvc_callback_ops = { + .rpc_call_done = nlmsvc_callback_exit, + .rpc_release = nlmsvc_callback_release, +}; + +/* * `Async' versions of the above service routines. They aren't really, * because we send the callback before the reply proper. I hope this * doesn't break any clients. */ -static int -nlmsvc_proc_test_msg(struct svc_rqst *rqstp, struct nlm_args *argp, - void *resp) +static int nlmsvc_callback(struct svc_rqst *rqstp, u32 proc, struct nlm_args *argp, + int (*func)(struct svc_rqst *, struct nlm_args *, struct nlm_res *)) { - struct nlm_res res; - u32 stat; + struct nlm_host *host; + struct nlm_rqst *call; + int stat; - dprintk("lockd: TEST_MSG called\n"); - memset(&res, 0, sizeof(res)); + host = nlmsvc_lookup_host(rqstp); + if (host == NULL) + return rpc_system_err; - if ((stat = nlmsvc_proc_test(rqstp, argp, &res)) == 0) - stat = nlmsvc_callback(rqstp, NLMPROC_TEST_RES, &res); - return stat; + call = nlm_alloc_call(host); + if (call == NULL) + return rpc_system_err; + + stat = func(rqstp, argp, &call->a_res); + if (stat != 0) { + nlm_release_call(call); + return stat; + } + + call->a_flags = RPC_TASK_ASYNC; + if (nlm_async_reply(call, proc, &nlmsvc_callback_ops) < 0) + return rpc_system_err; + return rpc_success; } -static int -nlmsvc_proc_lock_msg(struct svc_rqst *rqstp, struct nlm_args *argp, +static int nlmsvc_proc_test_msg(struct svc_rqst *rqstp, struct nlm_args *argp, void *resp) { - struct nlm_res res; - u32 stat; + dprintk("lockd: TEST_MSG called\n"); + return nlmsvc_callback(rqstp, NLMPROC_TEST_RES, argp, nlmsvc_proc_test); +} +static int nlmsvc_proc_lock_msg(struct svc_rqst *rqstp, struct nlm_args *argp, + void *resp) +{ dprintk("lockd: LOCK_MSG called\n"); - memset(&res, 0, sizeof(res)); - - if ((stat = nlmsvc_proc_lock(rqstp, argp, &res)) == 0) - stat = nlmsvc_callback(rqstp, NLMPROC_LOCK_RES, &res); - return stat; + return nlmsvc_callback(rqstp, NLMPROC_LOCK_RES, argp, nlmsvc_proc_lock); } -static int -nlmsvc_proc_cancel_msg(struct svc_rqst *rqstp, struct nlm_args *argp, +static int nlmsvc_proc_cancel_msg(struct svc_rqst *rqstp, struct nlm_args *argp, void *resp) { - struct nlm_res res; - u32 stat; - dprintk("lockd: CANCEL_MSG called\n"); - memset(&res, 0, sizeof(res)); - - if ((stat = nlmsvc_proc_cancel(rqstp, argp, &res)) == 0) - stat = nlmsvc_callback(rqstp, NLMPROC_CANCEL_RES, &res); - return stat; + return nlmsvc_callback(rqstp, NLMPROC_CANCEL_RES, argp, nlmsvc_proc_cancel); } static int nlmsvc_proc_unlock_msg(struct svc_rqst *rqstp, struct nlm_args *argp, void *resp) { - struct nlm_res res; - u32 stat; - dprintk("lockd: UNLOCK_MSG called\n"); - memset(&res, 0, sizeof(res)); - - if ((stat = nlmsvc_proc_unlock(rqstp, argp, &res)) == 0) - stat = nlmsvc_callback(rqstp, NLMPROC_UNLOCK_RES, &res); - return stat; + return nlmsvc_callback(rqstp, NLMPROC_UNLOCK_RES, argp, nlmsvc_proc_unlock); } static int nlmsvc_proc_granted_msg(struct svc_rqst *rqstp, struct nlm_args *argp, void *resp) { - struct nlm_res res; - u32 stat; - dprintk("lockd: GRANTED_MSG called\n"); - memset(&res, 0, sizeof(res)); - - if ((stat = nlmsvc_proc_granted(rqstp, argp, &res)) == 0) - stat = nlmsvc_callback(rqstp, NLMPROC_GRANTED_RES, &res); - return stat; + return nlmsvc_callback(rqstp, NLMPROC_GRANTED_RES, argp, nlmsvc_proc_granted); } /* @@ -497,55 +501,6 @@ nlmsvc_proc_granted_res(struct svc_rqst *rqstp, struct nlm_res *argp, } /* - * This is the generic lockd callback for async RPC calls - */ -static u32 -nlmsvc_callback(struct svc_rqst *rqstp, u32 proc, struct nlm_res *resp) -{ - struct nlm_host *host; - struct nlm_rqst *call; - - if (!(call = nlmclnt_alloc_call())) - return rpc_system_err; - - host = nlmclnt_lookup_host(&rqstp->rq_addr, - rqstp->rq_prot, rqstp->rq_vers); - if (!host) { - kfree(call); - return rpc_system_err; - } - - call->a_flags = RPC_TASK_ASYNC; - call->a_host = host; - memcpy(&call->a_args, resp, sizeof(*resp)); - - if (nlmsvc_async_call(call, proc, &nlmsvc_callback_ops) < 0) - goto error; - - return rpc_success; - error: - nlm_release_host(host); - kfree(call); - return rpc_system_err; -} - -static void nlmsvc_callback_exit(struct rpc_task *task, void *data) -{ - struct nlm_rqst *call = data; - - if (task->tk_status < 0) { - dprintk("lockd: %4d callback failed (errno = %d)\n", - task->tk_pid, -task->tk_status); - } - nlm_release_host(call->a_host); - kfree(call); -} - -static const struct rpc_call_ops nlmsvc_callback_ops = { - .rpc_call_done = nlmsvc_callback_exit, -}; - -/* * NLM Server procedures. */ diff --git a/fs/lockd/svcshare.c b/fs/lockd/svcshare.c index 4943fb7..27288c8 100644 --- a/fs/lockd/svcshare.c +++ b/fs/lockd/svcshare.c @@ -88,7 +88,7 @@ nlmsvc_unshare_file(struct nlm_host *host, struct nlm_file *file, * Traverse all shares for a given file (and host). * NLM_ACT_CHECK is handled by nlmsvc_inspect_file. */ -int +void nlmsvc_traverse_shares(struct nlm_host *host, struct nlm_file *file, int action) { struct nlm_share *share, **shpp; @@ -106,6 +106,4 @@ nlmsvc_traverse_shares(struct nlm_host *host, struct nlm_file *file, int action) } shpp = &share->s_next; } - - return 0; } diff --git a/fs/lockd/svcsubs.c b/fs/lockd/svcsubs.c index 62f4a38..c7a6e3a 100644 --- a/fs/lockd/svcsubs.c +++ b/fs/lockd/svcsubs.c @@ -182,7 +182,7 @@ nlm_traverse_locks(struct nlm_host *host, struct nlm_file *file, int action) again: file->f_locks = 0; for (fl = inode->i_flock; fl; fl = fl->fl_next) { - if (!(fl->fl_flags & FL_LOCKD)) + if (fl->fl_lmops != &nlmsvc_lock_operations) continue; /* update current lock count */ @@ -224,9 +224,8 @@ nlm_inspect_file(struct nlm_host *host, struct nlm_file *file, int action) if (file->f_count || file->f_blocks || file->f_shares) return 1; } else { - if (nlmsvc_traverse_blocks(host, file, action) - || nlmsvc_traverse_shares(host, file, action)) - return 1; + nlmsvc_traverse_blocks(host, file, action); + nlmsvc_traverse_shares(host, file, action); } return nlm_traverse_locks(host, file, action); } diff --git a/fs/lockd/xdr.c b/fs/lockd/xdr.c index 1d700a4..f22a376 100644 --- a/fs/lockd/xdr.c +++ b/fs/lockd/xdr.c @@ -131,10 +131,11 @@ nlm_decode_lock(u32 *p, struct nlm_lock *lock) || !(p = nlm_decode_fh(p, &lock->fh)) || !(p = nlm_decode_oh(p, &lock->oh))) return NULL; + lock->svid = ntohl(*p++); locks_init_lock(fl); fl->fl_owner = current->files; - fl->fl_pid = ntohl(*p++); + fl->fl_pid = (pid_t)lock->svid; fl->fl_flags = FL_POSIX; fl->fl_type = F_RDLCK; /* as good as anything else */ start = ntohl(*p++); @@ -174,7 +175,7 @@ nlm_encode_lock(u32 *p, struct nlm_lock *lock) else len = loff_t_to_s32(fl->fl_end - fl->fl_start + 1); - *p++ = htonl(fl->fl_pid); + *p++ = htonl(lock->svid); *p++ = htonl(start); *p++ = htonl(len); @@ -197,7 +198,7 @@ nlm_encode_testres(u32 *p, struct nlm_res *resp) struct file_lock *fl = &resp->lock.fl; *p++ = (fl->fl_type == F_RDLCK)? xdr_zero : xdr_one; - *p++ = htonl(fl->fl_pid); + *p++ = htonl(resp->lock.svid); /* Encode owner handle. */ if (!(p = xdr_encode_netobj(p, &resp->lock.oh))) @@ -298,7 +299,8 @@ nlmsvc_decode_shareargs(struct svc_rqst *rqstp, u32 *p, nlm_args *argp) memset(lock, 0, sizeof(*lock)); locks_init_lock(&lock->fl); - lock->fl.fl_pid = ~(u32) 0; + lock->svid = ~(u32) 0; + lock->fl.fl_pid = (pid_t)lock->svid; if (!(p = nlm_decode_cookie(p, &argp->cookie)) || !(p = xdr_decode_string_inplace(p, &lock->caller, @@ -415,7 +417,8 @@ nlmclt_decode_testres(struct rpc_rqst *req, u32 *p, struct nlm_res *resp) memset(&resp->lock, 0, sizeof(resp->lock)); locks_init_lock(fl); excl = ntohl(*p++); - fl->fl_pid = ntohl(*p++); + resp->lock.svid = ntohl(*p++); + fl->fl_pid = (pid_t)resp->lock.svid; if (!(p = nlm_decode_oh(p, &resp->lock.oh))) return -EIO; @@ -543,7 +546,9 @@ nlmclt_decode_res(struct rpc_rqst *req, u32 *p, struct nlm_res *resp) .p_proc = NLMPROC_##proc, \ .p_encode = (kxdrproc_t) nlmclt_encode_##argtype, \ .p_decode = (kxdrproc_t) nlmclt_decode_##restype, \ - .p_bufsiz = MAX(NLM_##argtype##_sz, NLM_##restype##_sz) << 2 \ + .p_bufsiz = MAX(NLM_##argtype##_sz, NLM_##restype##_sz) << 2, \ + .p_statidx = NLMPROC_##proc, \ + .p_name = #proc, \ } static struct rpc_procinfo nlm_procedures[] = { diff --git a/fs/lockd/xdr4.c b/fs/lockd/xdr4.c index fdcf105a..36eb175 100644 --- a/fs/lockd/xdr4.c +++ b/fs/lockd/xdr4.c @@ -130,10 +130,11 @@ nlm4_decode_lock(u32 *p, struct nlm_lock *lock) || !(p = nlm4_decode_fh(p, &lock->fh)) || !(p = nlm4_decode_oh(p, &lock->oh))) return NULL; + lock->svid = ntohl(*p++); locks_init_lock(fl); fl->fl_owner = current->files; - fl->fl_pid = ntohl(*p++); + fl->fl_pid = (pid_t)lock->svid; fl->fl_flags = FL_POSIX; fl->fl_type = F_RDLCK; /* as good as anything else */ p = xdr_decode_hyper(p, &start); @@ -167,7 +168,7 @@ nlm4_encode_lock(u32 *p, struct nlm_lock *lock) || (fl->fl_end > NLM4_OFFSET_MAX && fl->fl_end != OFFSET_MAX)) return NULL; - *p++ = htonl(fl->fl_pid); + *p++ = htonl(lock->svid); start = loff_t_to_s64(fl->fl_start); if (fl->fl_end == OFFSET_MAX) @@ -198,7 +199,7 @@ nlm4_encode_testres(u32 *p, struct nlm_res *resp) struct file_lock *fl = &resp->lock.fl; *p++ = (fl->fl_type == F_RDLCK)? xdr_zero : xdr_one; - *p++ = htonl(fl->fl_pid); + *p++ = htonl(resp->lock.svid); /* Encode owner handle. */ if (!(p = xdr_encode_netobj(p, &resp->lock.oh))) @@ -212,8 +213,8 @@ nlm4_encode_testres(u32 *p, struct nlm_res *resp) p = xdr_encode_hyper(p, start); p = xdr_encode_hyper(p, len); - dprintk("xdr: encode_testres (status %d pid %d type %d start %Ld end %Ld)\n", - resp->status, fl->fl_pid, fl->fl_type, + dprintk("xdr: encode_testres (status %u pid %d type %d start %Ld end %Ld)\n", + resp->status, (int)resp->lock.svid, fl->fl_type, (long long)fl->fl_start, (long long)fl->fl_end); } @@ -303,7 +304,8 @@ nlm4svc_decode_shareargs(struct svc_rqst *rqstp, u32 *p, nlm_args *argp) memset(lock, 0, sizeof(*lock)); locks_init_lock(&lock->fl); - lock->fl.fl_pid = ~(u32) 0; + lock->svid = ~(u32) 0; + lock->fl.fl_pid = (pid_t)lock->svid; if (!(p = nlm4_decode_cookie(p, &argp->cookie)) || !(p = xdr_decode_string_inplace(p, &lock->caller, @@ -420,7 +422,8 @@ nlm4clt_decode_testres(struct rpc_rqst *req, u32 *p, struct nlm_res *resp) memset(&resp->lock, 0, sizeof(resp->lock)); locks_init_lock(fl); excl = ntohl(*p++); - fl->fl_pid = ntohl(*p++); + resp->lock.svid = ntohl(*p++); + fl->fl_pid = (pid_t)resp->lock.svid; if (!(p = nlm4_decode_oh(p, &resp->lock.oh))) return -EIO; @@ -548,7 +551,9 @@ nlm4clt_decode_res(struct rpc_rqst *req, u32 *p, struct nlm_res *resp) .p_proc = NLMPROC_##proc, \ .p_encode = (kxdrproc_t) nlm4clt_encode_##argtype, \ .p_decode = (kxdrproc_t) nlm4clt_decode_##restype, \ - .p_bufsiz = MAX(NLM4_##argtype##_sz, NLM4_##restype##_sz) << 2 \ + .p_bufsiz = MAX(NLM4_##argtype##_sz, NLM4_##restype##_sz) << 2, \ + .p_statidx = NLMPROC_##proc, \ + .p_name = #proc, \ } static struct rpc_procinfo nlm4_procedures[] = { @@ -139,10 +139,7 @@ int lease_break_time = 45; #define for_each_lock(inode, lockp) \ for (lockp = &inode->i_flock; *lockp != NULL; lockp = &(*lockp)->fl_next) -LIST_HEAD(file_lock_list); - -EXPORT_SYMBOL(file_lock_list); - +static LIST_HEAD(file_lock_list); static LIST_HEAD(blocked_list); static kmem_cache_t *filelock_cache; @@ -153,6 +150,21 @@ static struct file_lock *locks_alloc_lock(void) return kmem_cache_alloc(filelock_cache, SLAB_KERNEL); } +static void locks_release_private(struct file_lock *fl) +{ + if (fl->fl_ops) { + if (fl->fl_ops->fl_release_private) + fl->fl_ops->fl_release_private(fl); + fl->fl_ops = NULL; + } + if (fl->fl_lmops) { + if (fl->fl_lmops->fl_release_private) + fl->fl_lmops->fl_release_private(fl); + fl->fl_lmops = NULL; + } + +} + /* Free a lock which is not in use. */ static void locks_free_lock(struct file_lock *fl) { @@ -169,18 +181,7 @@ static void locks_free_lock(struct file_lock *fl) if (!list_empty(&fl->fl_link)) panic("Attempting to free lock on active lock list"); - if (fl->fl_ops) { - if (fl->fl_ops->fl_release_private) - fl->fl_ops->fl_release_private(fl); - fl->fl_ops = NULL; - } - - if (fl->fl_lmops) { - if (fl->fl_lmops->fl_release_private) - fl->fl_lmops->fl_release_private(fl); - fl->fl_lmops = NULL; - } - + locks_release_private(fl); kmem_cache_free(filelock_cache, fl); } @@ -218,24 +219,46 @@ static void init_once(void *foo, kmem_cache_t *cache, unsigned long flags) locks_init_lock(lock); } +static void locks_copy_private(struct file_lock *new, struct file_lock *fl) +{ + if (fl->fl_ops) { + if (fl->fl_ops->fl_copy_lock) + fl->fl_ops->fl_copy_lock(new, fl); + new->fl_ops = fl->fl_ops; + } + if (fl->fl_lmops) { + if (fl->fl_lmops->fl_copy_lock) + fl->fl_lmops->fl_copy_lock(new, fl); + new->fl_lmops = fl->fl_lmops; + } +} + /* * Initialize a new lock from an existing file_lock structure. */ -void locks_copy_lock(struct file_lock *new, struct file_lock *fl) +static void __locks_copy_lock(struct file_lock *new, const struct file_lock *fl) { new->fl_owner = fl->fl_owner; new->fl_pid = fl->fl_pid; - new->fl_file = fl->fl_file; + new->fl_file = NULL; new->fl_flags = fl->fl_flags; new->fl_type = fl->fl_type; new->fl_start = fl->fl_start; new->fl_end = fl->fl_end; + new->fl_ops = NULL; + new->fl_lmops = NULL; +} + +void locks_copy_lock(struct file_lock *new, struct file_lock *fl) +{ + locks_release_private(new); + + __locks_copy_lock(new, fl); + new->fl_file = fl->fl_file; new->fl_ops = fl->fl_ops; new->fl_lmops = fl->fl_lmops; - if (fl->fl_ops && fl->fl_ops->fl_copy_lock) - fl->fl_ops->fl_copy_lock(new, fl); - if (fl->fl_lmops && fl->fl_lmops->fl_copy_lock) - fl->fl_lmops->fl_copy_lock(new, fl); + + locks_copy_private(new, fl); } EXPORT_SYMBOL(locks_copy_lock); @@ -654,8 +677,9 @@ static int locks_block_on_timeout(struct file_lock *blocker, struct file_lock *w return result; } -struct file_lock * -posix_test_lock(struct file *filp, struct file_lock *fl) +int +posix_test_lock(struct file *filp, struct file_lock *fl, + struct file_lock *conflock) { struct file_lock *cfl; @@ -666,9 +690,13 @@ posix_test_lock(struct file *filp, struct file_lock *fl) if (posix_locks_conflict(cfl, fl)) break; } + if (cfl) { + __locks_copy_lock(conflock, cfl); + unlock_kernel(); + return 1; + } unlock_kernel(); - - return (cfl); + return 0; } EXPORT_SYMBOL(posix_test_lock); @@ -904,7 +932,8 @@ static int __posix_lock_file(struct inode *inode, struct file_lock *request) fl->fl_start = request->fl_start; fl->fl_end = request->fl_end; fl->fl_type = request->fl_type; - fl->fl_u = request->fl_u; + locks_release_private(fl); + locks_copy_private(fl, request); request = fl; added = 1; } @@ -1544,7 +1573,7 @@ asmlinkage long sys_flock(unsigned int fd, unsigned int cmd) */ int fcntl_getlk(struct file *filp, struct flock __user *l) { - struct file_lock *fl, file_lock; + struct file_lock *fl, cfl, file_lock; struct flock flock; int error; @@ -1568,7 +1597,7 @@ int fcntl_getlk(struct file *filp, struct flock __user *l) else fl = (file_lock.fl_type == F_UNLCK ? NULL : &file_lock); } else { - fl = posix_test_lock(filp, &file_lock); + fl = (posix_test_lock(filp, &file_lock, &cfl) ? &cfl : NULL); } flock.l_type = F_UNLCK; @@ -1698,7 +1727,7 @@ out: */ int fcntl_getlk64(struct file *filp, struct flock64 __user *l) { - struct file_lock *fl, file_lock; + struct file_lock *fl, cfl, file_lock; struct flock64 flock; int error; @@ -1722,7 +1751,7 @@ int fcntl_getlk64(struct file *filp, struct flock64 __user *l) else fl = (file_lock.fl_type == F_UNLCK ? NULL : &file_lock); } else { - fl = posix_test_lock(filp, &file_lock); + fl = (posix_test_lock(filp, &file_lock, &cfl) ? &cfl : NULL); } flock.l_type = F_UNLCK; @@ -1936,21 +1965,6 @@ void locks_remove_flock(struct file *filp) } /** - * posix_block_lock - blocks waiting for a file lock - * @blocker: the lock which is blocking - * @waiter: the lock which conflicts and has to wait - * - * lockd needs to block waiting for locks. - */ -void -posix_block_lock(struct file_lock *blocker, struct file_lock *waiter) -{ - locks_insert_block(blocker, waiter); -} - -EXPORT_SYMBOL(posix_block_lock); - -/** * posix_unblock_lock - stop waiting for a file lock * @filp: how the file was opened * @waiter: the lock which was waiting diff --git a/fs/namespace.c b/fs/namespace.c index 39c81a8..71e75bc 100644 --- a/fs/namespace.c +++ b/fs/namespace.c @@ -399,6 +399,44 @@ struct seq_operations mounts_op = { .show = show_vfsmnt }; +static int show_vfsstat(struct seq_file *m, void *v) +{ + struct vfsmount *mnt = v; + int err = 0; + + /* device */ + if (mnt->mnt_devname) { + seq_puts(m, "device "); + mangle(m, mnt->mnt_devname); + } else + seq_puts(m, "no device"); + + /* mount point */ + seq_puts(m, " mounted on "); + seq_path(m, mnt, mnt->mnt_root, " \t\n\\"); + seq_putc(m, ' '); + + /* file system type */ + seq_puts(m, "with fstype "); + mangle(m, mnt->mnt_sb->s_type->name); + + /* optional statistics */ + if (mnt->mnt_sb->s_op->show_stats) { + seq_putc(m, ' '); + err = mnt->mnt_sb->s_op->show_stats(m, mnt); + } + + seq_putc(m, '\n'); + return err; +} + +struct seq_operations mountstats_op = { + .start = m_start, + .next = m_next, + .stop = m_stop, + .show = show_vfsstat, +}; + /** * may_umount_tree - check if a mount tree is busy * @mnt: root of mount tree diff --git a/fs/nfs/callback.c b/fs/nfs/callback.c index fcd97406..99d2cfb 100644 --- a/fs/nfs/callback.c +++ b/fs/nfs/callback.c @@ -55,7 +55,12 @@ static void nfs_callback_svc(struct svc_rqst *rqstp) complete(&nfs_callback_info.started); - while (nfs_callback_info.users != 0 || !signalled()) { + for(;;) { + if (signalled()) { + if (nfs_callback_info.users == 0) + break; + flush_signals(current); + } /* * Listen for a request on the socket */ @@ -73,6 +78,7 @@ static void nfs_callback_svc(struct svc_rqst *rqstp) svc_process(serv, rqstp); } + svc_exit_thread(rqstp); nfs_callback_info.pid = 0; complete(&nfs_callback_info.stopped); unlock_kernel(); @@ -134,11 +140,13 @@ int nfs_callback_down(void) lock_kernel(); down(&nfs_callback_sema); - if (--nfs_callback_info.users || nfs_callback_info.pid == 0) - goto out; - kill_proc(nfs_callback_info.pid, SIGKILL, 1); - wait_for_completion(&nfs_callback_info.stopped); -out: + nfs_callback_info.users--; + do { + if (nfs_callback_info.users != 0 || nfs_callback_info.pid == 0) + break; + if (kill_proc(nfs_callback_info.pid, SIGKILL, 1) < 0) + break; + } while (wait_for_completion_timeout(&nfs_callback_info.stopped, 5*HZ) == 0); up(&nfs_callback_sema); unlock_kernel(); return ret; diff --git a/fs/nfs/callback_xdr.c b/fs/nfs/callback_xdr.c index 7c33b9a..05c38cf 100644 --- a/fs/nfs/callback_xdr.c +++ b/fs/nfs/callback_xdr.c @@ -330,7 +330,7 @@ static unsigned encode_op_hdr(struct xdr_stream *xdr, uint32_t op, uint32_t res) static unsigned encode_getattr_res(struct svc_rqst *rqstp, struct xdr_stream *xdr, const struct cb_getattrres *res) { - uint32_t *savep; + uint32_t *savep = NULL; unsigned status = res->status; if (unlikely(status != 0)) @@ -358,23 +358,26 @@ static unsigned process_op(struct svc_rqst *rqstp, struct xdr_stream *xdr_in, void *argp, struct xdr_stream *xdr_out, void *resp) { - struct callback_op *op; - unsigned int op_nr; + struct callback_op *op = &callback_ops[0]; + unsigned int op_nr = OP_CB_ILLEGAL; unsigned int status = 0; long maxlen; unsigned res; dprintk("%s: start\n", __FUNCTION__); status = decode_op_hdr(xdr_in, &op_nr); - if (unlikely(status != 0)) { - op_nr = OP_CB_ILLEGAL; - op = &callback_ops[0]; - } else if (unlikely(op_nr != OP_CB_GETATTR && op_nr != OP_CB_RECALL)) { - op_nr = OP_CB_ILLEGAL; - op = &callback_ops[0]; - status = htonl(NFS4ERR_OP_ILLEGAL); - } else - op = &callback_ops[op_nr]; + if (likely(status == 0)) { + switch (op_nr) { + case OP_CB_GETATTR: + case OP_CB_RECALL: + op = &callback_ops[op_nr]; + break; + default: + op_nr = OP_CB_ILLEGAL; + op = &callback_ops[0]; + status = htonl(NFS4ERR_OP_ILLEGAL); + } + } maxlen = xdr_out->end - xdr_out->p; if (maxlen > 0 && maxlen < PAGE_SIZE) { @@ -416,6 +419,7 @@ static int nfs4_callback_compound(struct svc_rqst *rqstp, void *argp, void *resp decode_compound_hdr_arg(&xdr_in, &hdr_arg); hdr_res.taglen = hdr_arg.taglen; hdr_res.tag = hdr_arg.tag; + hdr_res.nops = NULL; encode_compound_hdr_res(&xdr_out, &hdr_res); for (;;) { diff --git a/fs/nfs/delegation.c b/fs/nfs/delegation.c index c6f07c1..d3be923 100644 --- a/fs/nfs/delegation.c +++ b/fs/nfs/delegation.c @@ -421,3 +421,22 @@ void nfs_delegation_reap_unclaimed(struct nfs4_client *clp) nfs_free_delegation(delegation); } } + +int nfs4_copy_delegation_stateid(nfs4_stateid *dst, struct inode *inode) +{ + struct nfs4_client *clp = NFS_SERVER(inode)->nfs4_state; + struct nfs_inode *nfsi = NFS_I(inode); + struct nfs_delegation *delegation; + int res = 0; + + if (nfsi->delegation_state == 0) + return 0; + spin_lock(&clp->cl_lock); + delegation = nfsi->delegation; + if (delegation != NULL) { + memcpy(dst->data, delegation->stateid.data, sizeof(dst->data)); + res = 1; + } + spin_unlock(&clp->cl_lock); + return res; +} diff --git a/fs/nfs/delegation.h b/fs/nfs/delegation.h index 7a0b2bf..3858694 100644 --- a/fs/nfs/delegation.h +++ b/fs/nfs/delegation.h @@ -41,6 +41,7 @@ void nfs_delegation_reap_unclaimed(struct nfs4_client *clp); int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid); int nfs4_open_delegation_recall(struct dentry *dentry, struct nfs4_state *state); int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl); +int nfs4_copy_delegation_stateid(nfs4_stateid *dst, struct inode *inode); static inline int nfs_have_delegation(struct inode *inode, int flags) { diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c index a1554be..06c48b3 100644 --- a/fs/nfs/dir.c +++ b/fs/nfs/dir.c @@ -34,6 +34,7 @@ #include "nfs4_fs.h" #include "delegation.h" +#include "iostat.h" #define NFS_PARANOIA 1 /* #define NFS_DEBUG_VERBOSE 1 */ @@ -129,6 +130,9 @@ nfs_opendir(struct inode *inode, struct file *filp) { int res = 0; + dfprintk(VFS, "NFS: opendir(%s/%ld)\n", + inode->i_sb->s_id, inode->i_ino); + lock_kernel(); /* Call generic open code in order to cache credentials */ if (!res) @@ -172,7 +176,9 @@ int nfs_readdir_filler(nfs_readdir_descriptor_t *desc, struct page *page) unsigned long timestamp; int error; - dfprintk(VFS, "NFS: nfs_readdir_filler() reading cookie %Lu into page %lu.\n", (long long)desc->entry->cookie, page->index); + dfprintk(DIRCACHE, "NFS: %s: reading cookie %Lu into page %lu\n", + __FUNCTION__, (long long)desc->entry->cookie, + page->index); again: timestamp = jiffies; @@ -244,7 +250,8 @@ int find_dirent(nfs_readdir_descriptor_t *desc) status; while((status = dir_decode(desc)) == 0) { - dfprintk(VFS, "NFS: found cookie %Lu\n", (unsigned long long)entry->cookie); + dfprintk(DIRCACHE, "NFS: %s: examining cookie %Lu\n", + __FUNCTION__, (unsigned long long)entry->cookie); if (entry->prev_cookie == *desc->dir_cookie) break; if (loop_count++ > 200) { @@ -252,7 +259,6 @@ int find_dirent(nfs_readdir_descriptor_t *desc) schedule(); } } - dfprintk(VFS, "NFS: find_dirent() returns %d\n", status); return status; } @@ -276,7 +282,8 @@ int find_dirent_index(nfs_readdir_descriptor_t *desc) if (status) break; - dfprintk(VFS, "NFS: found cookie %Lu at index %Ld\n", (unsigned long long)entry->cookie, desc->current_index); + dfprintk(DIRCACHE, "NFS: found cookie %Lu at index %Ld\n", + (unsigned long long)entry->cookie, desc->current_index); if (desc->file->f_pos == desc->current_index) { *desc->dir_cookie = entry->cookie; @@ -288,7 +295,6 @@ int find_dirent_index(nfs_readdir_descriptor_t *desc) schedule(); } } - dfprintk(VFS, "NFS: find_dirent_index() returns %d\n", status); return status; } @@ -303,7 +309,9 @@ int find_dirent_page(nfs_readdir_descriptor_t *desc) struct page *page; int status; - dfprintk(VFS, "NFS: find_dirent_page() searching directory page %ld\n", desc->page_index); + dfprintk(DIRCACHE, "NFS: %s: searching page %ld for target %Lu\n", + __FUNCTION__, desc->page_index, + (long long) *desc->dir_cookie); page = read_cache_page(inode->i_mapping, desc->page_index, (filler_t *)nfs_readdir_filler, desc); @@ -324,7 +332,7 @@ int find_dirent_page(nfs_readdir_descriptor_t *desc) if (status < 0) dir_page_release(desc); out: - dfprintk(VFS, "NFS: find_dirent_page() returns %d\n", status); + dfprintk(DIRCACHE, "NFS: %s: returns %d\n", __FUNCTION__, status); return status; read_error: page_cache_release(page); @@ -346,13 +354,15 @@ int readdir_search_pagecache(nfs_readdir_descriptor_t *desc) /* Always search-by-index from the beginning of the cache */ if (*desc->dir_cookie == 0) { - dfprintk(VFS, "NFS: readdir_search_pagecache() searching for offset %Ld\n", (long long)desc->file->f_pos); + dfprintk(DIRCACHE, "NFS: readdir_search_pagecache() searching for offset %Ld\n", + (long long)desc->file->f_pos); desc->page_index = 0; desc->entry->cookie = desc->entry->prev_cookie = 0; desc->entry->eof = 0; desc->current_index = 0; } else - dfprintk(VFS, "NFS: readdir_search_pagecache() searching for cookie %Lu\n", (unsigned long long)*desc->dir_cookie); + dfprintk(DIRCACHE, "NFS: readdir_search_pagecache() searching for cookie %Lu\n", + (unsigned long long)*desc->dir_cookie); for (;;) { res = find_dirent_page(desc); @@ -365,7 +375,8 @@ int readdir_search_pagecache(nfs_readdir_descriptor_t *desc) schedule(); } } - dfprintk(VFS, "NFS: readdir_search_pagecache() returned %d\n", res); + + dfprintk(DIRCACHE, "NFS: %s: returns %d\n", __FUNCTION__, res); return res; } @@ -390,7 +401,8 @@ int nfs_do_filldir(nfs_readdir_descriptor_t *desc, void *dirent, int loop_count = 0, res; - dfprintk(VFS, "NFS: nfs_do_filldir() filling starting @ cookie %Lu\n", (long long)entry->cookie); + dfprintk(DIRCACHE, "NFS: nfs_do_filldir() filling starting @ cookie %Lu\n", + (unsigned long long)entry->cookie); for(;;) { unsigned d_type = DT_UNKNOWN; @@ -427,7 +439,8 @@ int nfs_do_filldir(nfs_readdir_descriptor_t *desc, void *dirent, dir_page_release(desc); if (dentry != NULL) dput(dentry); - dfprintk(VFS, "NFS: nfs_do_filldir() filling ended @ cookie %Lu; returning = %d\n", (unsigned long long)*desc->dir_cookie, res); + dfprintk(DIRCACHE, "NFS: nfs_do_filldir() filling ended @ cookie %Lu; returning = %d\n", + (unsigned long long)*desc->dir_cookie, res); return res; } @@ -453,7 +466,8 @@ int uncached_readdir(nfs_readdir_descriptor_t *desc, void *dirent, struct page *page = NULL; int status; - dfprintk(VFS, "NFS: uncached_readdir() searching for cookie %Lu\n", (unsigned long long)*desc->dir_cookie); + dfprintk(DIRCACHE, "NFS: uncached_readdir() searching for cookie %Lu\n", + (unsigned long long)*desc->dir_cookie); page = alloc_page(GFP_HIGHUSER); if (!page) { @@ -485,7 +499,8 @@ int uncached_readdir(nfs_readdir_descriptor_t *desc, void *dirent, desc->entry->cookie = desc->entry->prev_cookie = 0; desc->entry->eof = 0; out: - dfprintk(VFS, "NFS: uncached_readdir() returns %d\n", status); + dfprintk(DIRCACHE, "NFS: %s: returns %d\n", + __FUNCTION__, status); return status; out_release: dir_page_release(desc); @@ -507,6 +522,11 @@ static int nfs_readdir(struct file *filp, void *dirent, filldir_t filldir) struct nfs_fattr fattr; long res; + dfprintk(VFS, "NFS: readdir(%s/%s) starting at cookie %Lu\n", + dentry->d_parent->d_name.name, dentry->d_name.name, + (long long)filp->f_pos); + nfs_inc_stats(inode, NFSIOS_VFSGETDENTS); + lock_kernel(); res = nfs_revalidate_inode(NFS_SERVER(inode), inode); @@ -566,9 +586,12 @@ static int nfs_readdir(struct file *filp, void *dirent, filldir_t filldir) } } unlock_kernel(); - if (res < 0) - return res; - return 0; + if (res > 0) + res = 0; + dfprintk(VFS, "NFS: readdir(%s/%s) returns %ld\n", + dentry->d_parent->d_name.name, dentry->d_name.name, + res); + return res; } loff_t nfs_llseek_dir(struct file *filp, loff_t offset, int origin) @@ -599,6 +622,10 @@ out: */ int nfs_fsync_dir(struct file *filp, struct dentry *dentry, int datasync) { + dfprintk(VFS, "NFS: fsync_dir(%s/%s) datasync %d\n", + dentry->d_parent->d_name.name, dentry->d_name.name, + datasync); + return 0; } @@ -713,6 +740,7 @@ static int nfs_lookup_revalidate(struct dentry * dentry, struct nameidata *nd) parent = dget_parent(dentry); lock_kernel(); dir = parent->d_inode; + nfs_inc_stats(dir, NFSIOS_DENTRYREVALIDATE); inode = dentry->d_inode; if (!inode) { @@ -722,8 +750,9 @@ static int nfs_lookup_revalidate(struct dentry * dentry, struct nameidata *nd) } if (is_bad_inode(inode)) { - dfprintk(VFS, "nfs_lookup_validate: %s/%s has dud inode\n", - dentry->d_parent->d_name.name, dentry->d_name.name); + dfprintk(LOOKUPCACHE, "%s: %s/%s has dud inode\n", + __FUNCTION__, dentry->d_parent->d_name.name, + dentry->d_name.name); goto out_bad; } @@ -755,6 +784,9 @@ static int nfs_lookup_revalidate(struct dentry * dentry, struct nameidata *nd) out_valid: unlock_kernel(); dput(parent); + dfprintk(LOOKUPCACHE, "NFS: %s(%s/%s) is valid\n", + __FUNCTION__, dentry->d_parent->d_name.name, + dentry->d_name.name); return 1; out_zap_parent: nfs_zap_caches(dir); @@ -771,6 +803,9 @@ out_zap_parent: d_drop(dentry); unlock_kernel(); dput(parent); + dfprintk(LOOKUPCACHE, "NFS: %s(%s/%s) is invalid\n", + __FUNCTION__, dentry->d_parent->d_name.name, + dentry->d_name.name); return 0; } @@ -844,6 +879,7 @@ static struct dentry *nfs_lookup(struct inode *dir, struct dentry * dentry, stru dfprintk(VFS, "NFS: lookup(%s/%s)\n", dentry->d_parent->d_name.name, dentry->d_name.name); + nfs_inc_stats(dir, NFSIOS_VFSLOOKUP); res = ERR_PTR(-ENAMETOOLONG); if (dentry->d_name.len > NFS_SERVER(dir)->namelen) @@ -865,9 +901,9 @@ static struct dentry *nfs_lookup(struct inode *dir, struct dentry * dentry, stru res = ERR_PTR(error); goto out_unlock; } - res = ERR_PTR(-EACCES); inode = nfs_fhget(dentry->d_sb, &fhandle, &fattr); - if (!inode) + res = (struct dentry *)inode; + if (IS_ERR(res)) goto out_unlock; no_entry: res = d_add_unique(dentry, inode); @@ -912,6 +948,9 @@ static struct dentry *nfs_atomic_lookup(struct inode *dir, struct dentry *dentry struct dentry *res = NULL; int error; + dfprintk(VFS, "NFS: atomic_lookup(%s/%ld), %s\n", + dir->i_sb->s_id, dir->i_ino, dentry->d_name.name); + /* Check that we are indeed trying to open this file */ if (!is_atomic_open(dir, nd)) goto no_open; @@ -1057,7 +1096,7 @@ static struct dentry *nfs_readdir_lookup(nfs_readdir_descriptor_t *desc) return NULL; dentry->d_op = NFS_PROTO(dir)->dentry_ops; inode = nfs_fhget(dentry->d_sb, entry->fh, entry->fattr); - if (!inode) { + if (IS_ERR(inode)) { dput(dentry); return NULL; } @@ -1095,9 +1134,9 @@ int nfs_instantiate(struct dentry *dentry, struct nfs_fh *fhandle, if (error < 0) goto out_err; } - error = -ENOMEM; inode = nfs_fhget(dentry->d_sb, fhandle, fattr); - if (inode == NULL) + error = PTR_ERR(inode); + if (IS_ERR(inode)) goto out_err; d_instantiate(dentry, inode); return 0; @@ -1119,8 +1158,8 @@ static int nfs_create(struct inode *dir, struct dentry *dentry, int mode, int error; int open_flags = 0; - dfprintk(VFS, "NFS: create(%s/%ld, %s\n", dir->i_sb->s_id, - dir->i_ino, dentry->d_name.name); + dfprintk(VFS, "NFS: create(%s/%ld), %s\n", + dir->i_sb->s_id, dir->i_ino, dentry->d_name.name); attr.ia_mode = mode; attr.ia_valid = ATTR_MODE; @@ -1153,8 +1192,8 @@ nfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev) struct iattr attr; int status; - dfprintk(VFS, "NFS: mknod(%s/%ld, %s\n", dir->i_sb->s_id, - dir->i_ino, dentry->d_name.name); + dfprintk(VFS, "NFS: mknod(%s/%ld), %s\n", + dir->i_sb->s_id, dir->i_ino, dentry->d_name.name); if (!new_valid_dev(rdev)) return -EINVAL; @@ -1186,8 +1225,8 @@ static int nfs_mkdir(struct inode *dir, struct dentry *dentry, int mode) struct iattr attr; int error; - dfprintk(VFS, "NFS: mkdir(%s/%ld, %s\n", dir->i_sb->s_id, - dir->i_ino, dentry->d_name.name); + dfprintk(VFS, "NFS: mkdir(%s/%ld), %s\n", + dir->i_sb->s_id, dir->i_ino, dentry->d_name.name); attr.ia_valid = ATTR_MODE; attr.ia_mode = mode | S_IFDIR; @@ -1212,8 +1251,8 @@ static int nfs_rmdir(struct inode *dir, struct dentry *dentry) { int error; - dfprintk(VFS, "NFS: rmdir(%s/%ld, %s\n", dir->i_sb->s_id, - dir->i_ino, dentry->d_name.name); + dfprintk(VFS, "NFS: rmdir(%s/%ld), %s\n", + dir->i_sb->s_id, dir->i_ino, dentry->d_name.name); lock_kernel(); nfs_begin_data_update(dir); @@ -1241,6 +1280,7 @@ static int nfs_sillyrename(struct inode *dir, struct dentry *dentry) dfprintk(VFS, "NFS: silly-rename(%s/%s, ct=%d)\n", dentry->d_parent->d_name.name, dentry->d_name.name, atomic_read(&dentry->d_count)); + nfs_inc_stats(dir, NFSIOS_SILLYRENAME); #ifdef NFS_PARANOIA if (!dentry->d_inode) @@ -1268,8 +1308,8 @@ dentry->d_parent->d_name.name, dentry->d_name.name); sillycounter++; sprintf(suffix, "%*.*x", countersize, countersize, sillycounter); - dfprintk(VFS, "trying to rename %s to %s\n", - dentry->d_name.name, silly); + dfprintk(VFS, "NFS: trying to rename %s to %s\n", + dentry->d_name.name, silly); sdentry = lookup_one_len(silly, dentry->d_parent, slen); /* @@ -1640,6 +1680,8 @@ int nfs_permission(struct inode *inode, int mask, struct nameidata *nd) struct rpc_cred *cred; int res = 0; + nfs_inc_stats(inode, NFSIOS_VFSACCESS); + if (mask == 0) goto out; /* Is this sys_access() ? */ @@ -1679,13 +1721,15 @@ force_lookup: res = PTR_ERR(cred); unlock_kernel(); out: + dfprintk(VFS, "NFS: permission(%s/%ld), mask=0x%x, res=%d\n", + inode->i_sb->s_id, inode->i_ino, mask, res); return res; out_notsup: res = nfs_revalidate_inode(NFS_SERVER(inode), inode); if (res == 0) res = generic_permission(inode, mask, NULL); unlock_kernel(); - return res; + goto out; } /* diff --git a/fs/nfs/direct.c b/fs/nfs/direct.c index 4ae2f3b..0f583cb 100644 --- a/fs/nfs/direct.c +++ b/fs/nfs/direct.c @@ -7,11 +7,11 @@ * * There are important applications whose performance or correctness * depends on uncached access to file data. Database clusters - * (multiple copies of the same instance running on separate hosts) + * (multiple copies of the same instance running on separate hosts) * implement their own cache coherency protocol that subsumes file - * system cache protocols. Applications that process datasets - * considerably larger than the client's memory do not always benefit - * from a local cache. A streaming video server, for instance, has no + * system cache protocols. Applications that process datasets + * considerably larger than the client's memory do not always benefit + * from a local cache. A streaming video server, for instance, has no * need to cache the contents of a file. * * When an application requests uncached I/O, all read and write requests @@ -34,6 +34,7 @@ * 08 Jun 2003 Port to 2.5 APIs --cel * 31 Mar 2004 Handle direct I/O without VFS support --cel * 15 Sep 2004 Parallel async reads --cel + * 04 May 2005 support O_DIRECT with aio --cel * */ @@ -54,10 +55,10 @@ #include <asm/uaccess.h> #include <asm/atomic.h> +#include "iostat.h" + #define NFSDBG_FACILITY NFSDBG_VFS -#define MAX_DIRECTIO_SIZE (4096UL << PAGE_SHIFT) -static void nfs_free_user_pages(struct page **pages, int npages, int do_dirty); static kmem_cache_t *nfs_direct_cachep; /* @@ -65,38 +66,78 @@ static kmem_cache_t *nfs_direct_cachep; */ struct nfs_direct_req { struct kref kref; /* release manager */ - struct list_head list; /* nfs_read_data structs */ - wait_queue_head_t wait; /* wait for i/o completion */ + + /* I/O parameters */ + struct list_head list, /* nfs_read/write_data structs */ + rewrite_list; /* saved nfs_write_data structs */ + struct nfs_open_context *ctx; /* file open context info */ + struct kiocb * iocb; /* controlling i/o request */ + struct inode * inode; /* target file of i/o */ + unsigned long user_addr; /* location of user's buffer */ + size_t user_count; /* total bytes to move */ + loff_t pos; /* starting offset in file */ struct page ** pages; /* pages in our buffer */ unsigned int npages; /* count of pages */ - atomic_t complete, /* i/os we're waiting for */ - count, /* bytes actually processed */ + + /* completion state */ + spinlock_t lock; /* protect completion state */ + int outstanding; /* i/os we're waiting for */ + ssize_t count, /* bytes actually processed */ error; /* any reported error */ + struct completion completion; /* wait for i/o completion */ + + /* commit state */ + struct nfs_write_data * commit_data; /* special write_data for commits */ + int flags; +#define NFS_ODIRECT_DO_COMMIT (1) /* an unstable reply was received */ +#define NFS_ODIRECT_RESCHED_WRITES (2) /* write verification failed */ + struct nfs_writeverf verf; /* unstable write verifier */ }; +static void nfs_direct_write_schedule(struct nfs_direct_req *dreq, int sync); +static void nfs_direct_write_complete(struct nfs_direct_req *dreq, struct inode *inode); /** - * nfs_get_user_pages - find and set up pages underlying user's buffer - * rw: direction (read or write) - * user_addr: starting address of this segment of user's buffer - * count: size of this segment - * @pages: returned array of page struct pointers underlying user's buffer + * nfs_direct_IO - NFS address space operation for direct I/O + * @rw: direction (read or write) + * @iocb: target I/O control block + * @iov: array of vectors that define I/O buffer + * @pos: offset in file to begin the operation + * @nr_segs: size of iovec array + * + * The presence of this routine in the address space ops vector means + * the NFS client supports direct I/O. However, we shunt off direct + * read and write requests before the VFS gets them, so this method + * should never be called. */ -static inline int -nfs_get_user_pages(int rw, unsigned long user_addr, size_t size, - struct page ***pages) +ssize_t nfs_direct_IO(int rw, struct kiocb *iocb, const struct iovec *iov, loff_t pos, unsigned long nr_segs) +{ + struct dentry *dentry = iocb->ki_filp->f_dentry; + + dprintk("NFS: nfs_direct_IO (%s) off/no(%Ld/%lu) EINVAL\n", + dentry->d_name.name, (long long) pos, nr_segs); + + return -EINVAL; +} + +static void nfs_free_user_pages(struct page **pages, int npages, int do_dirty) +{ + int i; + for (i = 0; i < npages; i++) { + struct page *page = pages[i]; + if (do_dirty && !PageCompound(page)) + set_page_dirty_lock(page); + page_cache_release(page); + } + kfree(pages); +} + +static inline int nfs_get_user_pages(int rw, unsigned long user_addr, size_t size, struct page ***pages) { int result = -ENOMEM; unsigned long page_count; size_t array_size; - /* set an arbitrary limit to prevent type overflow */ - /* XXX: this can probably be as large as INT_MAX */ - if (size > MAX_DIRECTIO_SIZE) { - *pages = NULL; - return -EFBIG; - } - page_count = (user_addr + size + PAGE_SIZE - 1) >> PAGE_SHIFT; page_count -= user_addr >> PAGE_SHIFT; @@ -108,75 +149,117 @@ nfs_get_user_pages(int rw, unsigned long user_addr, size_t size, page_count, (rw == READ), 0, *pages, NULL); up_read(¤t->mm->mmap_sem); - /* - * If we got fewer pages than expected from get_user_pages(), - * the user buffer runs off the end of a mapping; return EFAULT. - */ - if (result >= 0 && result < page_count) { - nfs_free_user_pages(*pages, result, 0); + if (result != page_count) { + /* + * If we got fewer pages than expected from + * get_user_pages(), the user buffer runs off the + * end of a mapping; return EFAULT. + */ + if (result >= 0) { + nfs_free_user_pages(*pages, result, 0); + result = -EFAULT; + } else + kfree(*pages); *pages = NULL; - result = -EFAULT; } } return result; } -/** - * nfs_free_user_pages - tear down page struct array - * @pages: array of page struct pointers underlying target buffer - * @npages: number of pages in the array - * @do_dirty: dirty the pages as we release them - */ -static void -nfs_free_user_pages(struct page **pages, int npages, int do_dirty) +static inline struct nfs_direct_req *nfs_direct_req_alloc(void) { - int i; - for (i = 0; i < npages; i++) { - struct page *page = pages[i]; - if (do_dirty && !PageCompound(page)) - set_page_dirty_lock(page); - page_cache_release(page); - } - kfree(pages); + struct nfs_direct_req *dreq; + + dreq = kmem_cache_alloc(nfs_direct_cachep, SLAB_KERNEL); + if (!dreq) + return NULL; + + kref_init(&dreq->kref); + init_completion(&dreq->completion); + INIT_LIST_HEAD(&dreq->list); + INIT_LIST_HEAD(&dreq->rewrite_list); + dreq->iocb = NULL; + dreq->ctx = NULL; + spin_lock_init(&dreq->lock); + dreq->outstanding = 0; + dreq->count = 0; + dreq->error = 0; + dreq->flags = 0; + + return dreq; } -/** - * nfs_direct_req_release - release nfs_direct_req structure for direct read - * @kref: kref object embedded in an nfs_direct_req structure - * - */ static void nfs_direct_req_release(struct kref *kref) { struct nfs_direct_req *dreq = container_of(kref, struct nfs_direct_req, kref); + + if (dreq->ctx != NULL) + put_nfs_open_context(dreq->ctx); kmem_cache_free(nfs_direct_cachep, dreq); } -/** - * nfs_direct_read_alloc - allocate nfs_read_data structures for direct read - * @count: count of bytes for the read request - * @rsize: local rsize setting +/* + * Collects and returns the final error value/byte-count. + */ +static ssize_t nfs_direct_wait(struct nfs_direct_req *dreq) +{ + ssize_t result = -EIOCBQUEUED; + + /* Async requests don't wait here */ + if (dreq->iocb) + goto out; + + result = wait_for_completion_interruptible(&dreq->completion); + + if (!result) + result = dreq->error; + if (!result) + result = dreq->count; + +out: + kref_put(&dreq->kref, nfs_direct_req_release); + return (ssize_t) result; +} + +/* + * We must hold a reference to all the pages in this direct read request + * until the RPCs complete. This could be long *after* we are woken up in + * nfs_direct_wait (for instance, if someone hits ^C on a slow server). * + * In addition, synchronous I/O uses a stack-allocated iocb. Thus we + * can't trust the iocb is still valid here if this is a synchronous + * request. If the waiter is woken prematurely, the iocb is long gone. + */ +static void nfs_direct_complete(struct nfs_direct_req *dreq) +{ + nfs_free_user_pages(dreq->pages, dreq->npages, 1); + + if (dreq->iocb) { + long res = (long) dreq->error; + if (!res) + res = (long) dreq->count; + aio_complete(dreq->iocb, res, 0); + } + complete_all(&dreq->completion); + + kref_put(&dreq->kref, nfs_direct_req_release); +} + +/* * Note we also set the number of requests we have in the dreq when we are * done. This prevents races with I/O completion so we will always wait * until all requests have been dispatched and completed. */ -static struct nfs_direct_req *nfs_direct_read_alloc(size_t nbytes, unsigned int rsize) +static struct nfs_direct_req *nfs_direct_read_alloc(size_t nbytes, size_t rsize) { struct list_head *list; struct nfs_direct_req *dreq; - unsigned int reads = 0; unsigned int rpages = (rsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; - dreq = kmem_cache_alloc(nfs_direct_cachep, SLAB_KERNEL); + dreq = nfs_direct_req_alloc(); if (!dreq) return NULL; - kref_init(&dreq->kref); - init_waitqueue_head(&dreq->wait); - INIT_LIST_HEAD(&dreq->list); - atomic_set(&dreq->count, 0); - atomic_set(&dreq->error, 0); - list = &dreq->list; for(;;) { struct nfs_read_data *data = nfs_readdata_alloc(rpages); @@ -196,72 +279,70 @@ static struct nfs_direct_req *nfs_direct_read_alloc(size_t nbytes, unsigned int list_add(&data->pages, list); data->req = (struct nfs_page *) dreq; - reads++; + dreq->outstanding++; if (nbytes <= rsize) break; nbytes -= rsize; } kref_get(&dreq->kref); - atomic_set(&dreq->complete, reads); return dreq; } -/** - * nfs_direct_read_result - handle a read reply for a direct read request - * @data: address of NFS READ operation control block - * @status: status of this NFS READ operation - * - * We must hold a reference to all the pages in this direct read request - * until the RPCs complete. This could be long *after* we are woken up in - * nfs_direct_read_wait (for instance, if someone hits ^C on a slow server). - */ -static void nfs_direct_read_result(struct nfs_read_data *data, int status) +static void nfs_direct_read_result(struct rpc_task *task, void *calldata) { + struct nfs_read_data *data = calldata; struct nfs_direct_req *dreq = (struct nfs_direct_req *) data->req; - if (likely(status >= 0)) - atomic_add(data->res.count, &dreq->count); + if (nfs_readpage_result(task, data) != 0) + return; + + spin_lock(&dreq->lock); + + if (likely(task->tk_status >= 0)) + dreq->count += data->res.count; else - atomic_set(&dreq->error, status); + dreq->error = task->tk_status; - if (unlikely(atomic_dec_and_test(&dreq->complete))) { - nfs_free_user_pages(dreq->pages, dreq->npages, 1); - wake_up(&dreq->wait); - kref_put(&dreq->kref, nfs_direct_req_release); + if (--dreq->outstanding) { + spin_unlock(&dreq->lock); + return; } + + spin_unlock(&dreq->lock); + nfs_direct_complete(dreq); } -/** - * nfs_direct_read_schedule - dispatch NFS READ operations for a direct read - * @dreq: address of nfs_direct_req struct for this request - * @inode: target inode - * @ctx: target file open context - * @user_addr: starting address of this segment of user's buffer - * @count: size of this segment - * @file_offset: offset in file to begin the operation - * +static const struct rpc_call_ops nfs_read_direct_ops = { + .rpc_call_done = nfs_direct_read_result, + .rpc_release = nfs_readdata_release, +}; + +/* * For each nfs_read_data struct that was allocated on the list, dispatch * an NFS READ operation */ -static void nfs_direct_read_schedule(struct nfs_direct_req *dreq, - struct inode *inode, struct nfs_open_context *ctx, - unsigned long user_addr, size_t count, loff_t file_offset) +static void nfs_direct_read_schedule(struct nfs_direct_req *dreq) { + struct nfs_open_context *ctx = dreq->ctx; + struct inode *inode = ctx->dentry->d_inode; struct list_head *list = &dreq->list; struct page **pages = dreq->pages; + size_t count = dreq->user_count; + loff_t pos = dreq->pos; + size_t rsize = NFS_SERVER(inode)->rsize; unsigned int curpage, pgbase; - unsigned int rsize = NFS_SERVER(inode)->rsize; curpage = 0; - pgbase = user_addr & ~PAGE_MASK; + pgbase = dreq->user_addr & ~PAGE_MASK; do { struct nfs_read_data *data; - unsigned int bytes; + size_t bytes; bytes = rsize; if (count < rsize) bytes = count; + BUG_ON(list_empty(list)); data = list_entry(list->next, struct nfs_read_data, pages); list_del_init(&data->pages); @@ -269,7 +350,7 @@ static void nfs_direct_read_schedule(struct nfs_direct_req *dreq, data->cred = ctx->cred; data->args.fh = NFS_FH(inode); data->args.context = ctx; - data->args.offset = file_offset; + data->args.offset = pos; data->args.pgbase = pgbase; data->args.pages = &pages[curpage]; data->args.count = bytes; @@ -277,77 +358,38 @@ static void nfs_direct_read_schedule(struct nfs_direct_req *dreq, data->res.eof = 0; data->res.count = bytes; + rpc_init_task(&data->task, NFS_CLIENT(inode), RPC_TASK_ASYNC, + &nfs_read_direct_ops, data); NFS_PROTO(inode)->read_setup(data); data->task.tk_cookie = (unsigned long) inode; - data->complete = nfs_direct_read_result; lock_kernel(); rpc_execute(&data->task); unlock_kernel(); - dfprintk(VFS, "NFS: %4d initiated direct read call (req %s/%Ld, %u bytes @ offset %Lu)\n", + dfprintk(VFS, "NFS: %5u initiated direct read call (req %s/%Ld, %zu bytes @ offset %Lu)\n", data->task.tk_pid, inode->i_sb->s_id, (long long)NFS_FILEID(inode), bytes, (unsigned long long)data->args.offset); - file_offset += bytes; + pos += bytes; pgbase += bytes; curpage += pgbase >> PAGE_SHIFT; pgbase &= ~PAGE_MASK; count -= bytes; } while (count != 0); + BUG_ON(!list_empty(list)); } -/** - * nfs_direct_read_wait - wait for I/O completion for direct reads - * @dreq: request on which we are to wait - * @intr: whether or not this wait can be interrupted - * - * Collects and returns the final error value/byte-count. - */ -static ssize_t nfs_direct_read_wait(struct nfs_direct_req *dreq, int intr) -{ - int result = 0; - - if (intr) { - result = wait_event_interruptible(dreq->wait, - (atomic_read(&dreq->complete) == 0)); - } else { - wait_event(dreq->wait, (atomic_read(&dreq->complete) == 0)); - } - - if (!result) - result = atomic_read(&dreq->error); - if (!result) - result = atomic_read(&dreq->count); - - kref_put(&dreq->kref, nfs_direct_req_release); - return (ssize_t) result; -} - -/** - * nfs_direct_read_seg - Read in one iov segment. Generate separate - * read RPCs for each "rsize" bytes. - * @inode: target inode - * @ctx: target file open context - * @user_addr: starting address of this segment of user's buffer - * @count: size of this segment - * @file_offset: offset in file to begin the operation - * @pages: array of addresses of page structs defining user's buffer - * @nr_pages: number of pages in the array - * - */ -static ssize_t nfs_direct_read_seg(struct inode *inode, - struct nfs_open_context *ctx, unsigned long user_addr, - size_t count, loff_t file_offset, struct page **pages, - unsigned int nr_pages) +static ssize_t nfs_direct_read(struct kiocb *iocb, unsigned long user_addr, size_t count, loff_t pos, struct page **pages, unsigned int nr_pages) { ssize_t result; sigset_t oldset; + struct inode *inode = iocb->ki_filp->f_mapping->host; struct rpc_clnt *clnt = NFS_CLIENT(inode); struct nfs_direct_req *dreq; @@ -355,284 +397,350 @@ static ssize_t nfs_direct_read_seg(struct inode *inode, if (!dreq) return -ENOMEM; + dreq->user_addr = user_addr; + dreq->user_count = count; + dreq->pos = pos; dreq->pages = pages; dreq->npages = nr_pages; + dreq->inode = inode; + dreq->ctx = get_nfs_open_context((struct nfs_open_context *)iocb->ki_filp->private_data); + if (!is_sync_kiocb(iocb)) + dreq->iocb = iocb; + nfs_add_stats(inode, NFSIOS_DIRECTREADBYTES, count); rpc_clnt_sigmask(clnt, &oldset); - nfs_direct_read_schedule(dreq, inode, ctx, user_addr, count, - file_offset); - result = nfs_direct_read_wait(dreq, clnt->cl_intr); + nfs_direct_read_schedule(dreq); + result = nfs_direct_wait(dreq); rpc_clnt_sigunmask(clnt, &oldset); return result; } -/** - * nfs_direct_read - For each iov segment, map the user's buffer - * then generate read RPCs. - * @inode: target inode - * @ctx: target file open context - * @iov: array of vectors that define I/O buffer - * file_offset: offset in file to begin the operation - * nr_segs: size of iovec array - * - * We've already pushed out any non-direct writes so that this read - * will see them when we read from the server. - */ -static ssize_t -nfs_direct_read(struct inode *inode, struct nfs_open_context *ctx, - const struct iovec *iov, loff_t file_offset, - unsigned long nr_segs) +static void nfs_direct_free_writedata(struct nfs_direct_req *dreq) { - ssize_t tot_bytes = 0; - unsigned long seg = 0; - - while ((seg < nr_segs) && (tot_bytes >= 0)) { - ssize_t result; - int page_count; - struct page **pages; - const struct iovec *vec = &iov[seg++]; - unsigned long user_addr = (unsigned long) vec->iov_base; - size_t size = vec->iov_len; - - page_count = nfs_get_user_pages(READ, user_addr, size, &pages); - if (page_count < 0) { - nfs_free_user_pages(pages, 0, 0); - if (tot_bytes > 0) - break; - return page_count; - } + list_splice_init(&dreq->rewrite_list, &dreq->list); + while (!list_empty(&dreq->list)) { + struct nfs_write_data *data = list_entry(dreq->list.next, struct nfs_write_data, pages); + list_del(&data->pages); + nfs_writedata_release(data); + } +} - result = nfs_direct_read_seg(inode, ctx, user_addr, size, - file_offset, pages, page_count); +#if defined(CONFIG_NFS_V3) || defined(CONFIG_NFS_V4) +static void nfs_direct_write_reschedule(struct nfs_direct_req *dreq) +{ + struct list_head *pos; - if (result <= 0) { - if (tot_bytes > 0) - break; - return result; - } - tot_bytes += result; - file_offset += result; - if (result < size) - break; + list_splice_init(&dreq->rewrite_list, &dreq->list); + list_for_each(pos, &dreq->list) + dreq->outstanding++; + dreq->count = 0; + + nfs_direct_write_schedule(dreq, FLUSH_STABLE); +} + +static void nfs_direct_commit_result(struct rpc_task *task, void *calldata) +{ + struct nfs_write_data *data = calldata; + struct nfs_direct_req *dreq = (struct nfs_direct_req *) data->req; + + /* Call the NFS version-specific code */ + if (NFS_PROTO(data->inode)->commit_done(task, data) != 0) + return; + if (unlikely(task->tk_status < 0)) { + dreq->error = task->tk_status; + dreq->flags = NFS_ODIRECT_RESCHED_WRITES; + } + if (memcmp(&dreq->verf, &data->verf, sizeof(data->verf))) { + dprintk("NFS: %5u commit verify failed\n", task->tk_pid); + dreq->flags = NFS_ODIRECT_RESCHED_WRITES; } - return tot_bytes; + dprintk("NFS: %5u commit returned %d\n", task->tk_pid, task->tk_status); + nfs_direct_write_complete(dreq, data->inode); } -/** - * nfs_direct_write_seg - Write out one iov segment. Generate separate - * write RPCs for each "wsize" bytes, then commit. - * @inode: target inode - * @ctx: target file open context - * user_addr: starting address of this segment of user's buffer - * count: size of this segment - * file_offset: offset in file to begin the operation - * @pages: array of addresses of page structs defining user's buffer - * nr_pages: size of pages array - */ -static ssize_t nfs_direct_write_seg(struct inode *inode, - struct nfs_open_context *ctx, unsigned long user_addr, - size_t count, loff_t file_offset, struct page **pages, - int nr_pages) +static const struct rpc_call_ops nfs_commit_direct_ops = { + .rpc_call_done = nfs_direct_commit_result, + .rpc_release = nfs_commit_release, +}; + +static void nfs_direct_commit_schedule(struct nfs_direct_req *dreq) { - const unsigned int wsize = NFS_SERVER(inode)->wsize; - size_t request; - int curpage, need_commit; - ssize_t result, tot_bytes; - struct nfs_writeverf first_verf; - struct nfs_write_data *wdata; - - wdata = nfs_writedata_alloc(NFS_SERVER(inode)->wpages); - if (!wdata) - return -ENOMEM; + struct nfs_write_data *data = dreq->commit_data; + struct rpc_task *task = &data->task; - wdata->inode = inode; - wdata->cred = ctx->cred; - wdata->args.fh = NFS_FH(inode); - wdata->args.context = ctx; - wdata->args.stable = NFS_UNSTABLE; - if (IS_SYNC(inode) || NFS_PROTO(inode)->version == 2 || count <= wsize) - wdata->args.stable = NFS_FILE_SYNC; - wdata->res.fattr = &wdata->fattr; - wdata->res.verf = &wdata->verf; + data->inode = dreq->inode; + data->cred = dreq->ctx->cred; - nfs_begin_data_update(inode); -retry: - need_commit = 0; - tot_bytes = 0; - curpage = 0; - request = count; - wdata->args.pgbase = user_addr & ~PAGE_MASK; - wdata->args.offset = file_offset; - do { - wdata->args.count = request; - if (wdata->args.count > wsize) - wdata->args.count = wsize; - wdata->args.pages = &pages[curpage]; + data->args.fh = NFS_FH(data->inode); + data->args.offset = dreq->pos; + data->args.count = dreq->user_count; + data->res.count = 0; + data->res.fattr = &data->fattr; + data->res.verf = &data->verf; - dprintk("NFS: direct write: c=%u o=%Ld ua=%lu, pb=%u, cp=%u\n", - wdata->args.count, (long long) wdata->args.offset, - user_addr + tot_bytes, wdata->args.pgbase, curpage); + rpc_init_task(&data->task, NFS_CLIENT(dreq->inode), RPC_TASK_ASYNC, + &nfs_commit_direct_ops, data); + NFS_PROTO(data->inode)->commit_setup(data, 0); - lock_kernel(); - result = NFS_PROTO(inode)->write(wdata); - unlock_kernel(); + data->task.tk_priority = RPC_PRIORITY_NORMAL; + data->task.tk_cookie = (unsigned long)data->inode; + /* Note: task.tk_ops->rpc_release will free dreq->commit_data */ + dreq->commit_data = NULL; - if (result <= 0) { - if (tot_bytes > 0) - break; - goto out; - } + dprintk("NFS: %5u initiated commit call\n", task->tk_pid); - if (tot_bytes == 0) - memcpy(&first_verf.verifier, &wdata->verf.verifier, - sizeof(first_verf.verifier)); - if (wdata->verf.committed != NFS_FILE_SYNC) { - need_commit = 1; - if (memcmp(&first_verf.verifier, &wdata->verf.verifier, - sizeof(first_verf.verifier))) - goto sync_retry; - } + lock_kernel(); + rpc_execute(&data->task); + unlock_kernel(); +} - tot_bytes += result; +static void nfs_direct_write_complete(struct nfs_direct_req *dreq, struct inode *inode) +{ + int flags = dreq->flags; - /* in case of a short write: stop now, let the app recover */ - if (result < wdata->args.count) + dreq->flags = 0; + switch (flags) { + case NFS_ODIRECT_DO_COMMIT: + nfs_direct_commit_schedule(dreq); break; + case NFS_ODIRECT_RESCHED_WRITES: + nfs_direct_write_reschedule(dreq); + break; + default: + nfs_end_data_update(inode); + if (dreq->commit_data != NULL) + nfs_commit_free(dreq->commit_data); + nfs_direct_free_writedata(dreq); + nfs_direct_complete(dreq); + } +} - wdata->args.offset += result; - wdata->args.pgbase += result; - curpage += wdata->args.pgbase >> PAGE_SHIFT; - wdata->args.pgbase &= ~PAGE_MASK; - request -= result; - } while (request != 0); +static void nfs_alloc_commit_data(struct nfs_direct_req *dreq) +{ + dreq->commit_data = nfs_commit_alloc(0); + if (dreq->commit_data != NULL) + dreq->commit_data->req = (struct nfs_page *) dreq; +} +#else +static inline void nfs_alloc_commit_data(struct nfs_direct_req *dreq) +{ + dreq->commit_data = NULL; +} - /* - * Commit data written so far, even in the event of an error - */ - if (need_commit) { - wdata->args.count = tot_bytes; - wdata->args.offset = file_offset; +static void nfs_direct_write_complete(struct nfs_direct_req *dreq, struct inode *inode) +{ + nfs_end_data_update(inode); + nfs_direct_free_writedata(dreq); + nfs_direct_complete(dreq); +} +#endif - lock_kernel(); - result = NFS_PROTO(inode)->commit(wdata); - unlock_kernel(); +static struct nfs_direct_req *nfs_direct_write_alloc(size_t nbytes, size_t wsize) +{ + struct list_head *list; + struct nfs_direct_req *dreq; + unsigned int wpages = (wsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; + + dreq = nfs_direct_req_alloc(); + if (!dreq) + return NULL; + + list = &dreq->list; + for(;;) { + struct nfs_write_data *data = nfs_writedata_alloc(wpages); - if (result < 0 || memcmp(&first_verf.verifier, - &wdata->verf.verifier, - sizeof(first_verf.verifier)) != 0) - goto sync_retry; + if (unlikely(!data)) { + while (!list_empty(list)) { + data = list_entry(list->next, + struct nfs_write_data, pages); + list_del(&data->pages); + nfs_writedata_free(data); + } + kref_put(&dreq->kref, nfs_direct_req_release); + return NULL; + } + + INIT_LIST_HEAD(&data->pages); + list_add(&data->pages, list); + + data->req = (struct nfs_page *) dreq; + dreq->outstanding++; + if (nbytes <= wsize) + break; + nbytes -= wsize; } - result = tot_bytes; -out: - nfs_end_data_update(inode); - nfs_writedata_free(wdata); - return result; + nfs_alloc_commit_data(dreq); -sync_retry: - wdata->args.stable = NFS_FILE_SYNC; - goto retry; + kref_get(&dreq->kref); + return dreq; } -/** - * nfs_direct_write - For each iov segment, map the user's buffer - * then generate write and commit RPCs. - * @inode: target inode - * @ctx: target file open context - * @iov: array of vectors that define I/O buffer - * file_offset: offset in file to begin the operation - * nr_segs: size of iovec array - * - * Upon return, generic_file_direct_IO invalidates any cached pages - * that non-direct readers might access, so they will pick up these - * writes immediately. - */ -static ssize_t nfs_direct_write(struct inode *inode, - struct nfs_open_context *ctx, const struct iovec *iov, - loff_t file_offset, unsigned long nr_segs) +static void nfs_direct_write_result(struct rpc_task *task, void *calldata) { - ssize_t tot_bytes = 0; - unsigned long seg = 0; - - while ((seg < nr_segs) && (tot_bytes >= 0)) { - ssize_t result; - int page_count; - struct page **pages; - const struct iovec *vec = &iov[seg++]; - unsigned long user_addr = (unsigned long) vec->iov_base; - size_t size = vec->iov_len; - - page_count = nfs_get_user_pages(WRITE, user_addr, size, &pages); - if (page_count < 0) { - nfs_free_user_pages(pages, 0, 0); - if (tot_bytes > 0) - break; - return page_count; - } + struct nfs_write_data *data = calldata; + struct nfs_direct_req *dreq = (struct nfs_direct_req *) data->req; + int status = task->tk_status; + + if (nfs_writeback_done(task, data) != 0) + return; + + spin_lock(&dreq->lock); - result = nfs_direct_write_seg(inode, ctx, user_addr, size, - file_offset, pages, page_count); - nfs_free_user_pages(pages, page_count, 0); + if (likely(status >= 0)) + dreq->count += data->res.count; + else + dreq->error = task->tk_status; - if (result <= 0) { - if (tot_bytes > 0) + if (data->res.verf->committed != NFS_FILE_SYNC) { + switch (dreq->flags) { + case 0: + memcpy(&dreq->verf, &data->verf, sizeof(dreq->verf)); + dreq->flags = NFS_ODIRECT_DO_COMMIT; break; - return result; + case NFS_ODIRECT_DO_COMMIT: + if (memcmp(&dreq->verf, &data->verf, sizeof(dreq->verf))) { + dprintk("NFS: %5u write verify failed\n", task->tk_pid); + dreq->flags = NFS_ODIRECT_RESCHED_WRITES; + } } - tot_bytes += result; - file_offset += result; - if (result < size) - break; } - return tot_bytes; + /* In case we have to resend */ + data->args.stable = NFS_FILE_SYNC; + + spin_unlock(&dreq->lock); } -/** - * nfs_direct_IO - NFS address space operation for direct I/O - * rw: direction (read or write) - * @iocb: target I/O control block - * @iov: array of vectors that define I/O buffer - * file_offset: offset in file to begin the operation - * nr_segs: size of iovec array - * +/* + * NB: Return the value of the first error return code. Subsequent + * errors after the first one are ignored. */ -ssize_t -nfs_direct_IO(int rw, struct kiocb *iocb, const struct iovec *iov, - loff_t file_offset, unsigned long nr_segs) +static void nfs_direct_write_release(void *calldata) { - ssize_t result = -EINVAL; - struct file *file = iocb->ki_filp; - struct nfs_open_context *ctx; - struct dentry *dentry = file->f_dentry; - struct inode *inode = dentry->d_inode; + struct nfs_write_data *data = calldata; + struct nfs_direct_req *dreq = (struct nfs_direct_req *) data->req; - /* - * No support for async yet - */ - if (!is_sync_kiocb(iocb)) - return result; - - ctx = (struct nfs_open_context *)file->private_data; - switch (rw) { - case READ: - dprintk("NFS: direct_IO(read) (%s) off/no(%Lu/%lu)\n", - dentry->d_name.name, file_offset, nr_segs); - - result = nfs_direct_read(inode, ctx, iov, - file_offset, nr_segs); - break; - case WRITE: - dprintk("NFS: direct_IO(write) (%s) off/no(%Lu/%lu)\n", - dentry->d_name.name, file_offset, nr_segs); - - result = nfs_direct_write(inode, ctx, iov, - file_offset, nr_segs); - break; - default: - break; + spin_lock(&dreq->lock); + if (--dreq->outstanding) { + spin_unlock(&dreq->lock); + return; } + spin_unlock(&dreq->lock); + + nfs_direct_write_complete(dreq, data->inode); +} + +static const struct rpc_call_ops nfs_write_direct_ops = { + .rpc_call_done = nfs_direct_write_result, + .rpc_release = nfs_direct_write_release, +}; + +/* + * For each nfs_write_data struct that was allocated on the list, dispatch + * an NFS WRITE operation + */ +static void nfs_direct_write_schedule(struct nfs_direct_req *dreq, int sync) +{ + struct nfs_open_context *ctx = dreq->ctx; + struct inode *inode = ctx->dentry->d_inode; + struct list_head *list = &dreq->list; + struct page **pages = dreq->pages; + size_t count = dreq->user_count; + loff_t pos = dreq->pos; + size_t wsize = NFS_SERVER(inode)->wsize; + unsigned int curpage, pgbase; + + curpage = 0; + pgbase = dreq->user_addr & ~PAGE_MASK; + do { + struct nfs_write_data *data; + size_t bytes; + + bytes = wsize; + if (count < wsize) + bytes = count; + + BUG_ON(list_empty(list)); + data = list_entry(list->next, struct nfs_write_data, pages); + list_move_tail(&data->pages, &dreq->rewrite_list); + + data->inode = inode; + data->cred = ctx->cred; + data->args.fh = NFS_FH(inode); + data->args.context = ctx; + data->args.offset = pos; + data->args.pgbase = pgbase; + data->args.pages = &pages[curpage]; + data->args.count = bytes; + data->res.fattr = &data->fattr; + data->res.count = bytes; + data->res.verf = &data->verf; + + rpc_init_task(&data->task, NFS_CLIENT(inode), RPC_TASK_ASYNC, + &nfs_write_direct_ops, data); + NFS_PROTO(inode)->write_setup(data, sync); + + data->task.tk_priority = RPC_PRIORITY_NORMAL; + data->task.tk_cookie = (unsigned long) inode; + + lock_kernel(); + rpc_execute(&data->task); + unlock_kernel(); + + dfprintk(VFS, "NFS: %5u initiated direct write call (req %s/%Ld, %zu bytes @ offset %Lu)\n", + data->task.tk_pid, + inode->i_sb->s_id, + (long long)NFS_FILEID(inode), + bytes, + (unsigned long long)data->args.offset); + + pos += bytes; + pgbase += bytes; + curpage += pgbase >> PAGE_SHIFT; + pgbase &= ~PAGE_MASK; + + count -= bytes; + } while (count != 0); + BUG_ON(!list_empty(list)); +} + +static ssize_t nfs_direct_write(struct kiocb *iocb, unsigned long user_addr, size_t count, loff_t pos, struct page **pages, int nr_pages) +{ + ssize_t result; + sigset_t oldset; + struct inode *inode = iocb->ki_filp->f_mapping->host; + struct rpc_clnt *clnt = NFS_CLIENT(inode); + struct nfs_direct_req *dreq; + size_t wsize = NFS_SERVER(inode)->wsize; + int sync = 0; + + dreq = nfs_direct_write_alloc(count, wsize); + if (!dreq) + return -ENOMEM; + if (dreq->commit_data == NULL || count < wsize) + sync = FLUSH_STABLE; + + dreq->user_addr = user_addr; + dreq->user_count = count; + dreq->pos = pos; + dreq->pages = pages; + dreq->npages = nr_pages; + dreq->inode = inode; + dreq->ctx = get_nfs_open_context((struct nfs_open_context *)iocb->ki_filp->private_data); + if (!is_sync_kiocb(iocb)) + dreq->iocb = iocb; + + nfs_add_stats(inode, NFSIOS_DIRECTWRITTENBYTES, count); + + nfs_begin_data_update(inode); + + rpc_clnt_sigmask(clnt, &oldset); + nfs_direct_write_schedule(dreq, sync); + result = nfs_direct_wait(dreq); + rpc_clnt_sigunmask(clnt, &oldset); + return result; } @@ -640,49 +748,40 @@ nfs_direct_IO(int rw, struct kiocb *iocb, const struct iovec *iov, * nfs_file_direct_read - file direct read operation for NFS files * @iocb: target I/O control block * @buf: user's buffer into which to read data - * count: number of bytes to read - * pos: byte offset in file where reading starts + * @count: number of bytes to read + * @pos: byte offset in file where reading starts * * We use this function for direct reads instead of calling * generic_file_aio_read() in order to avoid gfar's check to see if * the request starts before the end of the file. For that check * to work, we must generate a GETATTR before each direct read, and * even then there is a window between the GETATTR and the subsequent - * READ where the file size could change. So our preference is simply + * READ where the file size could change. Our preference is simply * to do all reads the application wants, and the server will take * care of managing the end of file boundary. - * + * * This function also eliminates unnecessarily updating the file's * atime locally, as the NFS server sets the file's atime, and this * client must read the updated atime from the server back into its * cache. */ -ssize_t -nfs_file_direct_read(struct kiocb *iocb, char __user *buf, size_t count, loff_t pos) +ssize_t nfs_file_direct_read(struct kiocb *iocb, char __user *buf, size_t count, loff_t pos) { ssize_t retval = -EINVAL; - loff_t *ppos = &iocb->ki_pos; + int page_count; + struct page **pages; struct file *file = iocb->ki_filp; - struct nfs_open_context *ctx = - (struct nfs_open_context *) file->private_data; struct address_space *mapping = file->f_mapping; - struct inode *inode = mapping->host; - struct iovec iov = { - .iov_base = buf, - .iov_len = count, - }; dprintk("nfs: direct read(%s/%s, %lu@%Ld)\n", file->f_dentry->d_parent->d_name.name, file->f_dentry->d_name.name, (unsigned long) count, (long long) pos); - if (!is_sync_kiocb(iocb)) - goto out; if (count < 0) goto out; retval = -EFAULT; - if (!access_ok(VERIFY_WRITE, iov.iov_base, iov.iov_len)) + if (!access_ok(VERIFY_WRITE, buf, count)) goto out; retval = 0; if (!count) @@ -692,9 +791,16 @@ nfs_file_direct_read(struct kiocb *iocb, char __user *buf, size_t count, loff_t if (retval) goto out; - retval = nfs_direct_read(inode, ctx, &iov, pos, 1); + retval = nfs_get_user_pages(READ, (unsigned long) buf, + count, &pages); + if (retval < 0) + goto out; + page_count = retval; + + retval = nfs_direct_read(iocb, (unsigned long) buf, count, pos, + pages, page_count); if (retval > 0) - *ppos = pos + retval; + iocb->ki_pos = pos + retval; out: return retval; @@ -704,8 +810,8 @@ out: * nfs_file_direct_write - file direct write operation for NFS files * @iocb: target I/O control block * @buf: user's buffer from which to write data - * count: number of bytes to write - * pos: byte offset in file where writing starts + * @count: number of bytes to write + * @pos: byte offset in file where writing starts * * We use this function for direct writes instead of calling * generic_file_aio_write() in order to avoid taking the inode @@ -725,28 +831,19 @@ out: * Note that O_APPEND is not supported for NFS direct writes, as there * is no atomic O_APPEND write facility in the NFS protocol. */ -ssize_t -nfs_file_direct_write(struct kiocb *iocb, const char __user *buf, size_t count, loff_t pos) +ssize_t nfs_file_direct_write(struct kiocb *iocb, const char __user *buf, size_t count, loff_t pos) { ssize_t retval; + int page_count; + struct page **pages; struct file *file = iocb->ki_filp; - struct nfs_open_context *ctx = - (struct nfs_open_context *) file->private_data; struct address_space *mapping = file->f_mapping; - struct inode *inode = mapping->host; - struct iovec iov = { - .iov_base = (char __user *)buf, - }; dfprintk(VFS, "nfs: direct write(%s/%s, %lu@%Ld)\n", file->f_dentry->d_parent->d_name.name, file->f_dentry->d_name.name, (unsigned long) count, (long long) pos); - retval = -EINVAL; - if (!is_sync_kiocb(iocb)) - goto out; - retval = generic_write_checks(file, &pos, &count, 0); if (retval) goto out; @@ -757,19 +854,35 @@ nfs_file_direct_write(struct kiocb *iocb, const char __user *buf, size_t count, retval = 0; if (!count) goto out; - iov.iov_len = count, retval = -EFAULT; - if (!access_ok(VERIFY_READ, iov.iov_base, iov.iov_len)) + if (!access_ok(VERIFY_READ, buf, count)) goto out; retval = nfs_sync_mapping(mapping); if (retval) goto out; - retval = nfs_direct_write(inode, ctx, &iov, pos, 1); + retval = nfs_get_user_pages(WRITE, (unsigned long) buf, + count, &pages); + if (retval < 0) + goto out; + page_count = retval; + + retval = nfs_direct_write(iocb, (unsigned long) buf, count, + pos, pages, page_count); + + /* + * XXX: nfs_end_data_update() already ensures this file's + * cached data is subsequently invalidated. Do we really + * need to call invalidate_inode_pages2() again here? + * + * For aio writes, this invalidation will almost certainly + * occur before the writes complete. Kind of racey. + */ if (mapping->nrpages) invalidate_inode_pages2(mapping); + if (retval > 0) iocb->ki_pos = pos + retval; @@ -777,6 +890,10 @@ out: return retval; } +/** + * nfs_init_directcache - create a slab cache for nfs_direct_req structures + * + */ int nfs_init_directcache(void) { nfs_direct_cachep = kmem_cache_create("nfs_direct_cache", @@ -790,6 +907,10 @@ int nfs_init_directcache(void) return 0; } +/** + * nfs_init_directcache - destroy the slab cache for nfs_direct_req structures + * + */ void nfs_destroy_directcache(void) { if (kmem_cache_destroy(nfs_direct_cachep)) diff --git a/fs/nfs/file.c b/fs/nfs/file.c index 7a79fbe..5263b28 100644 --- a/fs/nfs/file.c +++ b/fs/nfs/file.c @@ -32,6 +32,7 @@ #include <asm/system.h> #include "delegation.h" +#include "iostat.h" #define NFSDBG_FACILITY NFSDBG_FILE @@ -102,18 +103,15 @@ static int nfs_check_flags(int flags) static int nfs_file_open(struct inode *inode, struct file *filp) { - struct nfs_server *server = NFS_SERVER(inode); - int (*open)(struct inode *, struct file *); int res; res = nfs_check_flags(filp->f_flags); if (res) return res; + nfs_inc_stats(inode, NFSIOS_VFSOPEN); lock_kernel(); - /* Do NFSv4 open() call */ - if ((open = server->rpc_ops->file_open) != NULL) - res = open(inode, filp); + res = NFS_SERVER(inode)->rpc_ops->file_open(inode, filp); unlock_kernel(); return res; } @@ -124,6 +122,7 @@ nfs_file_release(struct inode *inode, struct file *filp) /* Ensure that dirty pages are flushed out with the right creds */ if (filp->f_mode & FMODE_WRITE) filemap_fdatawrite(filp->f_mapping); + nfs_inc_stats(inode, NFSIOS_VFSRELEASE); return NFS_PROTO(inode)->file_release(inode, filp); } @@ -199,6 +198,7 @@ nfs_file_flush(struct file *file) if ((file->f_mode & FMODE_WRITE) == 0) return 0; + nfs_inc_stats(inode, NFSIOS_VFSFLUSH); lock_kernel(); /* Ensure that data+attribute caches are up to date after close() */ status = nfs_wb_all(inode); @@ -229,6 +229,7 @@ nfs_file_read(struct kiocb *iocb, char __user * buf, size_t count, loff_t pos) (unsigned long) count, (unsigned long) pos); result = nfs_revalidate_file(inode, iocb->ki_filp); + nfs_add_stats(inode, NFSIOS_NORMALREADBYTES, count); if (!result) result = generic_file_aio_read(iocb, buf, count, pos); return result; @@ -282,6 +283,7 @@ nfs_fsync(struct file *file, struct dentry *dentry, int datasync) dfprintk(VFS, "nfs: fsync(%s/%ld)\n", inode->i_sb->s_id, inode->i_ino); + nfs_inc_stats(inode, NFSIOS_VFSFSYNC); lock_kernel(); status = nfs_wb_all(inode); if (!status) { @@ -316,6 +318,17 @@ static int nfs_commit_write(struct file *file, struct page *page, unsigned offse return status; } +static int nfs_invalidate_page(struct page *page, unsigned long offset) +{ + /* FIXME: we really should cancel any unstarted writes on this page */ + return 1; +} + +static int nfs_release_page(struct page *page, gfp_t gfp) +{ + return !nfs_wb_page(page->mapping->host, page); +} + struct address_space_operations nfs_file_aops = { .readpage = nfs_readpage, .readpages = nfs_readpages, @@ -324,6 +337,8 @@ struct address_space_operations nfs_file_aops = { .writepages = nfs_writepages, .prepare_write = nfs_prepare_write, .commit_write = nfs_commit_write, + .invalidatepage = nfs_invalidate_page, + .releasepage = nfs_release_page, #ifdef CONFIG_NFS_DIRECTIO .direct_IO = nfs_direct_IO, #endif @@ -365,6 +380,7 @@ nfs_file_write(struct kiocb *iocb, const char __user *buf, size_t count, loff_t if (!count) goto out; + nfs_add_stats(inode, NFSIOS_NORMALWRITTENBYTES, count); result = generic_file_aio_write(iocb, buf, count, pos); out: return result; @@ -376,15 +392,17 @@ out_swapfile: static int do_getlk(struct file *filp, int cmd, struct file_lock *fl) { - struct file_lock *cfl; + struct file_lock cfl; struct inode *inode = filp->f_mapping->host; int status = 0; lock_kernel(); /* Try local locking first */ - cfl = posix_test_lock(filp, fl); - if (cfl != NULL) { - locks_copy_lock(fl, cfl); + if (posix_test_lock(filp, fl, &cfl)) { + fl->fl_start = cfl.fl_start; + fl->fl_end = cfl.fl_end; + fl->fl_type = cfl.fl_type; + fl->fl_pid = cfl.fl_pid; goto out; } @@ -425,10 +443,8 @@ static int do_vfs_lock(struct file *file, struct file_lock *fl) static int do_unlk(struct file *filp, int cmd, struct file_lock *fl) { struct inode *inode = filp->f_mapping->host; - sigset_t oldset; int status; - rpc_clnt_sigmask(NFS_CLIENT(inode), &oldset); /* * Flush all pending writes before doing anything * with locks.. @@ -446,17 +462,14 @@ static int do_unlk(struct file *filp, int cmd, struct file_lock *fl) else status = do_vfs_lock(filp, fl); unlock_kernel(); - rpc_clnt_sigunmask(NFS_CLIENT(inode), &oldset); return status; } static int do_setlk(struct file *filp, int cmd, struct file_lock *fl) { struct inode *inode = filp->f_mapping->host; - sigset_t oldset; int status; - rpc_clnt_sigmask(NFS_CLIENT(inode), &oldset); /* * Flush all pending writes before doing anything * with locks.. @@ -489,7 +502,6 @@ static int do_setlk(struct file *filp, int cmd, struct file_lock *fl) nfs_sync_mapping(filp->f_mapping); nfs_zap_caches(inode); out: - rpc_clnt_sigunmask(NFS_CLIENT(inode), &oldset); return status; } @@ -504,9 +516,7 @@ static int nfs_lock(struct file *filp, int cmd, struct file_lock *fl) inode->i_sb->s_id, inode->i_ino, fl->fl_type, fl->fl_flags, (long long)fl->fl_start, (long long)fl->fl_end); - - if (!inode) - return -EINVAL; + nfs_inc_stats(inode, NFSIOS_VFSLOCK); /* No mandatory locks over NFS */ if ((inode->i_mode & (S_ISGID | S_IXGRP)) == S_ISGID && @@ -531,9 +541,6 @@ static int nfs_flock(struct file *filp, int cmd, struct file_lock *fl) inode->i_sb->s_id, inode->i_ino, fl->fl_type, fl->fl_flags); - if (!inode) - return -EINVAL; - /* * No BSD flocks over NFS allowed. * Note: we could try to fake a POSIX lock request here by diff --git a/fs/nfs/idmap.c b/fs/nfs/idmap.c index 821edd3..3fab5b0 100644 --- a/fs/nfs/idmap.c +++ b/fs/nfs/idmap.c @@ -35,6 +35,7 @@ */ #include <linux/module.h> +#include <linux/mutex.h> #include <linux/init.h> #include <linux/types.h> #include <linux/slab.h> @@ -74,8 +75,8 @@ struct idmap { struct dentry *idmap_dentry; wait_queue_head_t idmap_wq; struct idmap_msg idmap_im; - struct semaphore idmap_lock; /* Serializes upcalls */ - struct semaphore idmap_im_lock; /* Protects the hashtable */ + struct mutex idmap_lock; /* Serializes upcalls */ + struct mutex idmap_im_lock; /* Protects the hashtable */ struct idmap_hashtable idmap_user_hash; struct idmap_hashtable idmap_group_hash; }; @@ -101,11 +102,9 @@ nfs_idmap_new(struct nfs4_client *clp) if (clp->cl_idmap != NULL) return; - if ((idmap = kmalloc(sizeof(*idmap), GFP_KERNEL)) == NULL) + if ((idmap = kzalloc(sizeof(*idmap), GFP_KERNEL)) == NULL) return; - memset(idmap, 0, sizeof(*idmap)); - snprintf(idmap->idmap_path, sizeof(idmap->idmap_path), "%s/idmap", clp->cl_rpcclient->cl_pathname); @@ -116,8 +115,8 @@ nfs_idmap_new(struct nfs4_client *clp) return; } - init_MUTEX(&idmap->idmap_lock); - init_MUTEX(&idmap->idmap_im_lock); + mutex_init(&idmap->idmap_lock); + mutex_init(&idmap->idmap_im_lock); init_waitqueue_head(&idmap->idmap_wq); idmap->idmap_user_hash.h_type = IDMAP_TYPE_USER; idmap->idmap_group_hash.h_type = IDMAP_TYPE_GROUP; @@ -132,6 +131,8 @@ nfs_idmap_delete(struct nfs4_client *clp) if (!idmap) return; + dput(idmap->idmap_dentry); + idmap->idmap_dentry = NULL; rpc_unlink(idmap->idmap_path); clp->cl_idmap = NULL; kfree(idmap); @@ -232,8 +233,8 @@ nfs_idmap_id(struct idmap *idmap, struct idmap_hashtable *h, if (namelen >= IDMAP_NAMESZ) return -EINVAL; - down(&idmap->idmap_lock); - down(&idmap->idmap_im_lock); + mutex_lock(&idmap->idmap_lock); + mutex_lock(&idmap->idmap_im_lock); he = idmap_lookup_name(h, name, namelen); if (he != NULL) { @@ -259,11 +260,11 @@ nfs_idmap_id(struct idmap *idmap, struct idmap_hashtable *h, } set_current_state(TASK_UNINTERRUPTIBLE); - up(&idmap->idmap_im_lock); + mutex_unlock(&idmap->idmap_im_lock); schedule(); current->state = TASK_RUNNING; remove_wait_queue(&idmap->idmap_wq, &wq); - down(&idmap->idmap_im_lock); + mutex_lock(&idmap->idmap_im_lock); if (im->im_status & IDMAP_STATUS_SUCCESS) { *id = im->im_id; @@ -272,8 +273,8 @@ nfs_idmap_id(struct idmap *idmap, struct idmap_hashtable *h, out: memset(im, 0, sizeof(*im)); - up(&idmap->idmap_im_lock); - up(&idmap->idmap_lock); + mutex_unlock(&idmap->idmap_im_lock); + mutex_unlock(&idmap->idmap_lock); return (ret); } @@ -293,8 +294,8 @@ nfs_idmap_name(struct idmap *idmap, struct idmap_hashtable *h, im = &idmap->idmap_im; - down(&idmap->idmap_lock); - down(&idmap->idmap_im_lock); + mutex_lock(&idmap->idmap_lock); + mutex_lock(&idmap->idmap_im_lock); he = idmap_lookup_id(h, id); if (he != 0) { @@ -320,11 +321,11 @@ nfs_idmap_name(struct idmap *idmap, struct idmap_hashtable *h, } set_current_state(TASK_UNINTERRUPTIBLE); - up(&idmap->idmap_im_lock); + mutex_unlock(&idmap->idmap_im_lock); schedule(); current->state = TASK_RUNNING; remove_wait_queue(&idmap->idmap_wq, &wq); - down(&idmap->idmap_im_lock); + mutex_lock(&idmap->idmap_im_lock); if (im->im_status & IDMAP_STATUS_SUCCESS) { if ((len = strnlen(im->im_name, IDMAP_NAMESZ)) == 0) @@ -335,8 +336,8 @@ nfs_idmap_name(struct idmap *idmap, struct idmap_hashtable *h, out: memset(im, 0, sizeof(*im)); - up(&idmap->idmap_im_lock); - up(&idmap->idmap_lock); + mutex_unlock(&idmap->idmap_im_lock); + mutex_unlock(&idmap->idmap_lock); return ret; } @@ -380,7 +381,7 @@ idmap_pipe_downcall(struct file *filp, const char __user *src, size_t mlen) if (copy_from_user(&im_in, src, mlen) != 0) return (-EFAULT); - down(&idmap->idmap_im_lock); + mutex_lock(&idmap->idmap_im_lock); ret = mlen; im->im_status = im_in.im_status; @@ -440,7 +441,7 @@ idmap_pipe_downcall(struct file *filp, const char __user *src, size_t mlen) idmap_update_entry(he, im_in.im_name, namelen_in, im_in.im_id); ret = mlen; out: - up(&idmap->idmap_im_lock); + mutex_unlock(&idmap->idmap_im_lock); return ret; } @@ -452,10 +453,10 @@ idmap_pipe_destroy_msg(struct rpc_pipe_msg *msg) if (msg->errno >= 0) return; - down(&idmap->idmap_im_lock); + mutex_lock(&idmap->idmap_im_lock); im->im_status = IDMAP_STATUS_LOOKUPFAIL; wake_up(&idmap->idmap_wq); - up(&idmap->idmap_im_lock); + mutex_unlock(&idmap->idmap_im_lock); } /* diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c index 3413996..2f7656b 100644 --- a/fs/nfs/inode.c +++ b/fs/nfs/inode.c @@ -26,6 +26,7 @@ #include <linux/unistd.h> #include <linux/sunrpc/clnt.h> #include <linux/sunrpc/stats.h> +#include <linux/sunrpc/metrics.h> #include <linux/nfs_fs.h> #include <linux/nfs_mount.h> #include <linux/nfs4_mount.h> @@ -42,6 +43,7 @@ #include "nfs4_fs.h" #include "callback.h" #include "delegation.h" +#include "iostat.h" #define NFSDBG_FACILITY NFSDBG_VFS #define NFS_PARANOIA 1 @@ -65,6 +67,7 @@ static void nfs_clear_inode(struct inode *); static void nfs_umount_begin(struct super_block *); static int nfs_statfs(struct super_block *, struct kstatfs *); static int nfs_show_options(struct seq_file *, struct vfsmount *); +static int nfs_show_stats(struct seq_file *, struct vfsmount *); static void nfs_zap_acl_cache(struct inode *); static struct rpc_program nfs_program; @@ -78,6 +81,7 @@ static struct super_operations nfs_sops = { .clear_inode = nfs_clear_inode, .umount_begin = nfs_umount_begin, .show_options = nfs_show_options, + .show_stats = nfs_show_stats, }; /* @@ -133,7 +137,7 @@ nfs_fattr_to_ino_t(struct nfs_fattr *fattr) static int nfs_write_inode(struct inode *inode, int sync) { - int flags = sync ? FLUSH_WAIT : 0; + int flags = sync ? FLUSH_SYNC : 0; int ret; ret = nfs_commit_inode(inode, flags); @@ -237,7 +241,6 @@ static struct inode * nfs_get_root(struct super_block *sb, struct nfs_fh *rootfh, struct nfs_fsinfo *fsinfo) { struct nfs_server *server = NFS_SB(sb); - struct inode *rooti; int error; error = server->rpc_ops->getroot(server, rootfh, fsinfo); @@ -246,10 +249,7 @@ nfs_get_root(struct super_block *sb, struct nfs_fh *rootfh, struct nfs_fsinfo *f return ERR_PTR(error); } - rooti = nfs_fhget(sb, rootfh, fsinfo->fattr); - if (!rooti) - return ERR_PTR(-ENOMEM); - return rooti; + return nfs_fhget(sb, rootfh, fsinfo->fattr); } /* @@ -277,6 +277,10 @@ nfs_sb_init(struct super_block *sb, rpc_authflavor_t authflavor) sb->s_magic = NFS_SUPER_MAGIC; + server->io_stats = nfs_alloc_iostats(); + if (server->io_stats == NULL) + return -ENOMEM; + root_inode = nfs_get_root(sb, &server->fh, &fsinfo); /* Did getting the root inode fail? */ if (IS_ERR(root_inode)) { @@ -290,6 +294,9 @@ nfs_sb_init(struct super_block *sb, rpc_authflavor_t authflavor) } sb->s_root->d_op = server->rpc_ops->dentry_ops; + /* mount time stamp, in seconds */ + server->mount_time = jiffies; + /* Get some general file system info */ if (server->namelen == 0 && server->rpc_ops->pathconf(server, &server->fh, &pathinfo) >= 0) @@ -396,6 +403,9 @@ nfs_create_client(struct nfs_server *server, const struct nfs_mount_data *data) nfs_init_timeout_values(&timeparms, proto, data->timeo, data->retrans); + server->retrans_timeo = timeparms.to_initval; + server->retrans_count = timeparms.to_retries; + /* create transport and client */ xprt = xprt_create_proto(proto, &server->addr, &timeparms); if (IS_ERR(xprt)) { @@ -579,7 +589,7 @@ nfs_statfs(struct super_block *sb, struct kstatfs *buf) } -static int nfs_show_options(struct seq_file *m, struct vfsmount *mnt) +static void nfs_show_mount_options(struct seq_file *m, struct nfs_server *nfss, int showdefaults) { static struct proc_nfs_info { int flag; @@ -588,28 +598,26 @@ static int nfs_show_options(struct seq_file *m, struct vfsmount *mnt) } nfs_info[] = { { NFS_MOUNT_SOFT, ",soft", ",hard" }, { NFS_MOUNT_INTR, ",intr", "" }, - { NFS_MOUNT_POSIX, ",posix", "" }, { NFS_MOUNT_NOCTO, ",nocto", "" }, { NFS_MOUNT_NOAC, ",noac", "" }, - { NFS_MOUNT_NONLM, ",nolock", ",lock" }, + { NFS_MOUNT_NONLM, ",nolock", "" }, { NFS_MOUNT_NOACL, ",noacl", "" }, { 0, NULL, NULL } }; struct proc_nfs_info *nfs_infop; - struct nfs_server *nfss = NFS_SB(mnt->mnt_sb); char buf[12]; char *proto; - seq_printf(m, ",v%d", nfss->rpc_ops->version); + seq_printf(m, ",vers=%d", nfss->rpc_ops->version); seq_printf(m, ",rsize=%d", nfss->rsize); seq_printf(m, ",wsize=%d", nfss->wsize); - if (nfss->acregmin != 3*HZ) + if (nfss->acregmin != 3*HZ || showdefaults) seq_printf(m, ",acregmin=%d", nfss->acregmin/HZ); - if (nfss->acregmax != 60*HZ) + if (nfss->acregmax != 60*HZ || showdefaults) seq_printf(m, ",acregmax=%d", nfss->acregmax/HZ); - if (nfss->acdirmin != 30*HZ) + if (nfss->acdirmin != 30*HZ || showdefaults) seq_printf(m, ",acdirmin=%d", nfss->acdirmin/HZ); - if (nfss->acdirmax != 60*HZ) + if (nfss->acdirmax != 60*HZ || showdefaults) seq_printf(m, ",acdirmax=%d", nfss->acdirmax/HZ); for (nfs_infop = nfs_info; nfs_infop->flag; nfs_infop++) { if (nfss->flags & nfs_infop->flag) @@ -629,8 +637,96 @@ static int nfs_show_options(struct seq_file *m, struct vfsmount *mnt) proto = buf; } seq_printf(m, ",proto=%s", proto); + seq_printf(m, ",timeo=%lu", 10U * nfss->retrans_timeo / HZ); + seq_printf(m, ",retrans=%u", nfss->retrans_count); +} + +static int nfs_show_options(struct seq_file *m, struct vfsmount *mnt) +{ + struct nfs_server *nfss = NFS_SB(mnt->mnt_sb); + + nfs_show_mount_options(m, nfss, 0); + seq_puts(m, ",addr="); seq_escape(m, nfss->hostname, " \t\n\\"); + + return 0; +} + +static int nfs_show_stats(struct seq_file *m, struct vfsmount *mnt) +{ + int i, cpu; + struct nfs_server *nfss = NFS_SB(mnt->mnt_sb); + struct rpc_auth *auth = nfss->client->cl_auth; + struct nfs_iostats totals = { }; + + seq_printf(m, "statvers=%s", NFS_IOSTAT_VERS); + + /* + * Display all mount option settings + */ + seq_printf(m, "\n\topts:\t"); + seq_puts(m, mnt->mnt_sb->s_flags & MS_RDONLY ? "ro" : "rw"); + seq_puts(m, mnt->mnt_sb->s_flags & MS_SYNCHRONOUS ? ",sync" : ""); + seq_puts(m, mnt->mnt_sb->s_flags & MS_NOATIME ? ",noatime" : ""); + seq_puts(m, mnt->mnt_sb->s_flags & MS_NODIRATIME ? ",nodiratime" : ""); + nfs_show_mount_options(m, nfss, 1); + + seq_printf(m, "\n\tage:\t%lu", (jiffies - nfss->mount_time) / HZ); + + seq_printf(m, "\n\tcaps:\t"); + seq_printf(m, "caps=0x%x", nfss->caps); + seq_printf(m, ",wtmult=%d", nfss->wtmult); + seq_printf(m, ",dtsize=%d", nfss->dtsize); + seq_printf(m, ",bsize=%d", nfss->bsize); + seq_printf(m, ",namelen=%d", nfss->namelen); + +#ifdef CONFIG_NFS_V4 + if (nfss->rpc_ops->version == 4) { + seq_printf(m, "\n\tnfsv4:\t"); + seq_printf(m, "bm0=0x%x", nfss->attr_bitmask[0]); + seq_printf(m, ",bm1=0x%x", nfss->attr_bitmask[1]); + seq_printf(m, ",acl=0x%x", nfss->acl_bitmask); + } +#endif + + /* + * Display security flavor in effect for this mount + */ + seq_printf(m, "\n\tsec:\tflavor=%d", auth->au_ops->au_flavor); + if (auth->au_flavor) + seq_printf(m, ",pseudoflavor=%d", auth->au_flavor); + + /* + * Display superblock I/O counters + */ + for (cpu = 0; cpu < NR_CPUS; cpu++) { + struct nfs_iostats *stats; + + if (!cpu_possible(cpu)) + continue; + + preempt_disable(); + stats = per_cpu_ptr(nfss->io_stats, cpu); + + for (i = 0; i < __NFSIOS_COUNTSMAX; i++) + totals.events[i] += stats->events[i]; + for (i = 0; i < __NFSIOS_BYTESMAX; i++) + totals.bytes[i] += stats->bytes[i]; + + preempt_enable(); + } + + seq_printf(m, "\n\tevents:\t"); + for (i = 0; i < __NFSIOS_COUNTSMAX; i++) + seq_printf(m, "%lu ", totals.events[i]); + seq_printf(m, "\n\tbytes:\t"); + for (i = 0; i < __NFSIOS_BYTESMAX; i++) + seq_printf(m, "%Lu ", totals.bytes[i]); + seq_printf(m, "\n"); + + rpc_print_iostats(m, nfss->client); + return 0; } @@ -660,6 +756,8 @@ static void nfs_zap_caches_locked(struct inode *inode) struct nfs_inode *nfsi = NFS_I(inode); int mode = inode->i_mode; + nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); + NFS_ATTRTIMEO(inode) = NFS_MINATTRTIMEO(inode); NFS_ATTRTIMEO_UPDATE(inode) = jiffies; @@ -751,7 +849,7 @@ nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr) .fh = fh, .fattr = fattr }; - struct inode *inode = NULL; + struct inode *inode = ERR_PTR(-ENOENT); unsigned long hash; if ((fattr->valid & NFS_ATTR_FATTR) == 0) @@ -764,8 +862,11 @@ nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr) hash = nfs_fattr_to_ino_t(fattr); - if (!(inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc))) + inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc); + if (inode == NULL) { + inode = ERR_PTR(-ENOMEM); goto out_no_inode; + } if (inode->i_state & I_NEW) { struct nfs_inode *nfsi = NFS_I(inode); @@ -834,7 +935,7 @@ out: return inode; out_no_inode: - printk("nfs_fhget: iget failed\n"); + dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode)); goto out; } @@ -847,6 +948,8 @@ nfs_setattr(struct dentry *dentry, struct iattr *attr) struct nfs_fattr fattr; int error; + nfs_inc_stats(inode, NFSIOS_VFSSETATTR); + if (attr->ia_valid & ATTR_SIZE) { if (!S_ISREG(inode->i_mode) || attr->ia_size == i_size_read(inode)) attr->ia_valid &= ~ATTR_SIZE; @@ -859,11 +962,9 @@ nfs_setattr(struct dentry *dentry, struct iattr *attr) lock_kernel(); nfs_begin_data_update(inode); - /* Write all dirty data if we're changing file permissions or size */ - if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID|ATTR_SIZE)) != 0) { - filemap_write_and_wait(inode->i_mapping); - nfs_wb_all(inode); - } + /* Write all dirty data */ + filemap_write_and_wait(inode->i_mapping); + nfs_wb_all(inode); /* * Return any delegations if we're going to change ACLs */ @@ -902,6 +1003,7 @@ void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr) spin_unlock(&inode->i_lock); } if ((attr->ia_valid & ATTR_SIZE) != 0) { + nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC); inode->i_size = attr->ia_size; vmtruncate(inode, attr->ia_size); } @@ -949,7 +1051,7 @@ int nfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat) int err; /* Flush out writes to the server in order to update c/mtime */ - nfs_sync_inode(inode, 0, 0, FLUSH_WAIT|FLUSH_NOCOMMIT); + nfs_sync_inode_wait(inode, 0, 0, FLUSH_NOCOMMIT); /* * We may force a getattr if the user cares about atime. @@ -973,7 +1075,7 @@ int nfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat) return err; } -struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry, struct rpc_cred *cred) +static struct nfs_open_context *alloc_nfs_open_context(struct vfsmount *mnt, struct dentry *dentry, struct rpc_cred *cred) { struct nfs_open_context *ctx; @@ -981,6 +1083,7 @@ struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry, struct rp if (ctx != NULL) { atomic_set(&ctx->count, 1); ctx->dentry = dget(dentry); + ctx->vfsmnt = mntget(mnt); ctx->cred = get_rpccred(cred); ctx->state = NULL; ctx->lockowner = current->files; @@ -1011,6 +1114,7 @@ void put_nfs_open_context(struct nfs_open_context *ctx) if (ctx->cred != NULL) put_rpccred(ctx->cred); dput(ctx->dentry); + mntput(ctx->vfsmnt); kfree(ctx); } } @@ -1019,7 +1123,7 @@ void put_nfs_open_context(struct nfs_open_context *ctx) * Ensure that mmap has a recent RPC credential for use when writing out * shared pages */ -void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx) +static void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx) { struct inode *inode = filp->f_dentry->d_inode; struct nfs_inode *nfsi = NFS_I(inode); @@ -1051,7 +1155,7 @@ struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_c return ctx; } -void nfs_file_clear_open_context(struct file *filp) +static void nfs_file_clear_open_context(struct file *filp) { struct inode *inode = filp->f_dentry->d_inode; struct nfs_open_context *ctx = (struct nfs_open_context *)filp->private_data; @@ -1076,7 +1180,7 @@ int nfs_open(struct inode *inode, struct file *filp) cred = rpcauth_lookupcred(NFS_CLIENT(inode)->cl_auth, 0); if (IS_ERR(cred)) return PTR_ERR(cred); - ctx = alloc_nfs_open_context(filp->f_dentry, cred); + ctx = alloc_nfs_open_context(filp->f_vfsmnt, filp->f_dentry, cred); put_rpccred(cred); if (ctx == NULL) return -ENOMEM; @@ -1185,6 +1289,7 @@ int nfs_attribute_timeout(struct inode *inode) */ int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) { + nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE); if (!(NFS_I(inode)->cache_validity & (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA)) && !nfs_attribute_timeout(inode)) return NFS_STALE(inode) ? -ESTALE : 0; @@ -1201,6 +1306,7 @@ void nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping) struct nfs_inode *nfsi = NFS_I(inode); if (nfsi->cache_validity & NFS_INO_INVALID_DATA) { + nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE); if (S_ISREG(inode->i_mode)) nfs_sync_mapping(mapping); invalidate_inode_pages2(mapping); @@ -1299,39 +1405,37 @@ static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fat if ((fattr->valid & NFS_ATTR_FATTR) == 0) return 0; + /* Has the inode gone and changed behind our back? */ + if (nfsi->fileid != fattr->fileid + || (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) { + return -EIO; + } + /* Are we in the process of updating data on the server? */ data_unstable = nfs_caches_unstable(inode); /* Do atomic weak cache consistency updates */ nfs_wcc_update_inode(inode, fattr); - if ((fattr->valid & NFS_ATTR_FATTR_V4) != 0 && - nfsi->change_attr != fattr->change_attr) { + if ((fattr->valid & NFS_ATTR_FATTR_V4) != 0) { + if (nfsi->change_attr == fattr->change_attr) + goto out; nfsi->cache_validity |= NFS_INO_INVALID_ATTR; if (!data_unstable) nfsi->cache_validity |= NFS_INO_REVAL_PAGECACHE; } - /* Has the inode gone and changed behind our back? */ - if (nfsi->fileid != fattr->fileid - || (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) { - return -EIO; - } - - cur_size = i_size_read(inode); - new_isize = nfs_size_to_loff_t(fattr->size); - /* Verify a few of the more important attributes */ if (!timespec_equal(&inode->i_mtime, &fattr->mtime)) { nfsi->cache_validity |= NFS_INO_INVALID_ATTR; if (!data_unstable) nfsi->cache_validity |= NFS_INO_REVAL_PAGECACHE; } - if (cur_size != new_isize) { - nfsi->cache_validity |= NFS_INO_INVALID_ATTR; - if (nfsi->npages == 0) - nfsi->cache_validity |= NFS_INO_REVAL_PAGECACHE; - } + + cur_size = i_size_read(inode); + new_isize = nfs_size_to_loff_t(fattr->size); + if (cur_size != new_isize && nfsi->npages == 0) + nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; /* Have any file permissions changed? */ if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO) @@ -1343,6 +1447,7 @@ static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fat if (inode->i_nlink != fattr->nlink) nfsi->cache_validity |= NFS_INO_INVALID_ATTR; +out: if (!timespec_equal(&inode->i_atime, &fattr->atime)) nfsi->cache_validity |= NFS_INO_INVALID_ATIME; @@ -1481,15 +1586,6 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) nfsi->cache_change_attribute = jiffies; } - if ((fattr->valid & NFS_ATTR_FATTR_V4) - && nfsi->change_attr != fattr->change_attr) { - dprintk("NFS: change_attr change on server for file %s/%ld\n", - inode->i_sb->s_id, inode->i_ino); - nfsi->change_attr = fattr->change_attr; - invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; - nfsi->cache_change_attribute = jiffies; - } - /* If ctime has changed we should definitely clear access+acl caches */ if (!timespec_equal(&inode->i_ctime, &fattr->ctime)) { invalid |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; @@ -1519,8 +1615,20 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) inode->i_blksize = fattr->du.nfs2.blocksize; } + if ((fattr->valid & NFS_ATTR_FATTR_V4)) { + if (nfsi->change_attr != fattr->change_attr) { + dprintk("NFS: change_attr change on server for file %s/%ld\n", + inode->i_sb->s_id, inode->i_ino); + nfsi->change_attr = fattr->change_attr; + invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; + nfsi->cache_change_attribute = jiffies; + } else + invalid &= ~(NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA); + } + /* Update attrtimeo value if we're out of the unstable period */ if (invalid & NFS_INO_INVALID_ATTR) { + nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); nfsi->attrtimeo_timestamp = jiffies; } else if (time_after(jiffies, nfsi->attrtimeo_timestamp+nfsi->attrtimeo)) { @@ -1637,10 +1745,9 @@ static struct super_block *nfs_get_sb(struct file_system_type *fs_type, #endif /* CONFIG_NFS_V3 */ s = ERR_PTR(-ENOMEM); - server = kmalloc(sizeof(struct nfs_server), GFP_KERNEL); + server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL); if (!server) goto out_err; - memset(server, 0, sizeof(struct nfs_server)); /* Zero out the NFS state stuff */ init_nfsv4_state(server); server->client = server->client_sys = server->client_acl = ERR_PTR(-EINVAL); @@ -1712,6 +1819,7 @@ static void nfs_kill_super(struct super_block *s) rpciod_down(); /* release rpciod */ + nfs_free_iostats(server->io_stats); kfree(server->hostname); kfree(server); } @@ -1738,6 +1846,7 @@ static struct super_operations nfs4_sops = { .clear_inode = nfs4_clear_inode, .umount_begin = nfs_umount_begin, .show_options = nfs_show_options, + .show_stats = nfs_show_stats, }; /* @@ -1800,6 +1909,9 @@ static int nfs4_fill_super(struct super_block *sb, struct nfs4_mount_data *data, nfs_init_timeout_values(&timeparms, data->proto, data->timeo, data->retrans); + server->retrans_timeo = timeparms.to_initval; + server->retrans_count = timeparms.to_retries; + clp = nfs4_get_client(&server->addr.sin_addr); if (!clp) { dprintk("%s: failed to create NFS4 client.\n", __FUNCTION__); @@ -1941,10 +2053,9 @@ static struct super_block *nfs4_get_sb(struct file_system_type *fs_type, return ERR_PTR(-EINVAL); } - server = kmalloc(sizeof(struct nfs_server), GFP_KERNEL); + server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL); if (!server) return ERR_PTR(-ENOMEM); - memset(server, 0, sizeof(struct nfs_server)); /* Zero out the NFS state stuff */ init_nfsv4_state(server); server->client = server->client_sys = server->client_acl = ERR_PTR(-EINVAL); @@ -2024,10 +2135,12 @@ static void nfs4_kill_super(struct super_block *sb) if (server->client != NULL && !IS_ERR(server->client)) rpc_shutdown_client(server->client); - rpciod_down(); /* release rpciod */ destroy_nfsv4_state(server); + rpciod_down(); + + nfs_free_iostats(server->io_stats); kfree(server->hostname); kfree(server); } diff --git a/fs/nfs/iostat.h b/fs/nfs/iostat.h new file mode 100644 index 0000000..6350ecbd --- /dev/null +++ b/fs/nfs/iostat.h @@ -0,0 +1,164 @@ +/* + * linux/fs/nfs/iostat.h + * + * Declarations for NFS client per-mount statistics + * + * Copyright (C) 2005, 2006 Chuck Lever <cel@netapp.com> + * + * NFS client per-mount statistics provide information about the health of + * the NFS client and the health of each NFS mount point. Generally these + * are not for detailed problem diagnosis, but simply to indicate that there + * is a problem. + * + * These counters are not meant to be human-readable, but are meant to be + * integrated into system monitoring tools such as "sar" and "iostat". As + * such, the counters are sampled by the tools over time, and are never + * zeroed after a file system is mounted. Moving averages can be computed + * by the tools by taking the difference between two instantaneous samples + * and dividing that by the time between the samples. + */ + +#ifndef _NFS_IOSTAT +#define _NFS_IOSTAT + +#define NFS_IOSTAT_VERS "1.0" + +/* + * NFS byte counters + * + * 1. SERVER - the number of payload bytes read from or written to the + * server by the NFS client via an NFS READ or WRITE request. + * + * 2. NORMAL - the number of bytes read or written by applications via + * the read(2) and write(2) system call interfaces. + * + * 3. DIRECT - the number of bytes read or written from files opened + * with the O_DIRECT flag. + * + * These counters give a view of the data throughput into and out of the NFS + * client. Comparing the number of bytes requested by an application with the + * number of bytes the client requests from the server can provide an + * indication of client efficiency (per-op, cache hits, etc). + * + * These counters can also help characterize which access methods are in + * use. DIRECT by itself shows whether there is any O_DIRECT traffic. + * NORMAL + DIRECT shows how much data is going through the system call + * interface. A large amount of SERVER traffic without much NORMAL or + * DIRECT traffic shows that applications are using mapped files. + * + * NFS page counters + * + * These count the number of pages read or written via nfs_readpage(), + * nfs_readpages(), or their write equivalents. + */ +enum nfs_stat_bytecounters { + NFSIOS_NORMALREADBYTES = 0, + NFSIOS_NORMALWRITTENBYTES, + NFSIOS_DIRECTREADBYTES, + NFSIOS_DIRECTWRITTENBYTES, + NFSIOS_SERVERREADBYTES, + NFSIOS_SERVERWRITTENBYTES, + NFSIOS_READPAGES, + NFSIOS_WRITEPAGES, + __NFSIOS_BYTESMAX, +}; + +/* + * NFS event counters + * + * These counters provide a low-overhead way of monitoring client activity + * without enabling NFS trace debugging. The counters show the rate at + * which VFS requests are made, and how often the client invalidates its + * data and attribute caches. This allows system administrators to monitor + * such things as how close-to-open is working, and answer questions such + * as "why are there so many GETATTR requests on the wire?" + * + * They also count anamolous events such as short reads and writes, silly + * renames due to close-after-delete, and operations that change the size + * of a file (such operations can often be the source of data corruption + * if applications aren't using file locking properly). + */ +enum nfs_stat_eventcounters { + NFSIOS_INODEREVALIDATE = 0, + NFSIOS_DENTRYREVALIDATE, + NFSIOS_DATAINVALIDATE, + NFSIOS_ATTRINVALIDATE, + NFSIOS_VFSOPEN, + NFSIOS_VFSLOOKUP, + NFSIOS_VFSACCESS, + NFSIOS_VFSUPDATEPAGE, + NFSIOS_VFSREADPAGE, + NFSIOS_VFSREADPAGES, + NFSIOS_VFSWRITEPAGE, + NFSIOS_VFSWRITEPAGES, + NFSIOS_VFSGETDENTS, + NFSIOS_VFSSETATTR, + NFSIOS_VFSFLUSH, + NFSIOS_VFSFSYNC, + NFSIOS_VFSLOCK, + NFSIOS_VFSRELEASE, + NFSIOS_CONGESTIONWAIT, + NFSIOS_SETATTRTRUNC, + NFSIOS_EXTENDWRITE, + NFSIOS_SILLYRENAME, + NFSIOS_SHORTREAD, + NFSIOS_SHORTWRITE, + NFSIOS_DELAY, + __NFSIOS_COUNTSMAX, +}; + +#ifdef __KERNEL__ + +#include <linux/percpu.h> +#include <linux/cache.h> + +struct nfs_iostats { + unsigned long long bytes[__NFSIOS_BYTESMAX]; + unsigned long events[__NFSIOS_COUNTSMAX]; +} ____cacheline_aligned; + +static inline void nfs_inc_server_stats(struct nfs_server *server, enum nfs_stat_eventcounters stat) +{ + struct nfs_iostats *iostats; + int cpu; + + cpu = get_cpu(); + iostats = per_cpu_ptr(server->io_stats, cpu); + iostats->events[stat] ++; + put_cpu_no_resched(); +} + +static inline void nfs_inc_stats(struct inode *inode, enum nfs_stat_eventcounters stat) +{ + nfs_inc_server_stats(NFS_SERVER(inode), stat); +} + +static inline void nfs_add_server_stats(struct nfs_server *server, enum nfs_stat_bytecounters stat, unsigned long addend) +{ + struct nfs_iostats *iostats; + int cpu; + + cpu = get_cpu(); + iostats = per_cpu_ptr(server->io_stats, cpu); + iostats->bytes[stat] += addend; + put_cpu_no_resched(); +} + +static inline void nfs_add_stats(struct inode *inode, enum nfs_stat_bytecounters stat, unsigned long addend) +{ + nfs_add_server_stats(NFS_SERVER(inode), stat, addend); +} + +static inline struct nfs_iostats *nfs_alloc_iostats(void) +{ + return alloc_percpu(struct nfs_iostats); +} + +static inline void nfs_free_iostats(struct nfs_iostats *stats) +{ + if (stats != NULL) + free_percpu(stats); +} + +#endif +#endif diff --git a/fs/nfs/mount_clnt.c b/fs/nfs/mount_clnt.c index 0b9a783..445abb4 100644 --- a/fs/nfs/mount_clnt.c +++ b/fs/nfs/mount_clnt.c @@ -49,9 +49,12 @@ nfsroot_mount(struct sockaddr_in *addr, char *path, struct nfs_fh *fh, struct mnt_fhstatus result = { .fh = fh }; + struct rpc_message msg = { + .rpc_argp = path, + .rpc_resp = &result, + }; char hostname[32]; int status; - int call; dprintk("NFS: nfs_mount(%08x:%s)\n", (unsigned)ntohl(addr->sin_addr.s_addr), path); @@ -61,8 +64,12 @@ nfsroot_mount(struct sockaddr_in *addr, char *path, struct nfs_fh *fh, if (IS_ERR(mnt_clnt)) return PTR_ERR(mnt_clnt); - call = (version == NFS_MNT3_VERSION) ? MOUNTPROC3_MNT : MNTPROC_MNT; - status = rpc_call(mnt_clnt, call, path, &result, 0); + if (version == NFS_MNT3_VERSION) + msg.rpc_proc = &mnt_clnt->cl_procinfo[MOUNTPROC3_MNT]; + else + msg.rpc_proc = &mnt_clnt->cl_procinfo[MNTPROC_MNT]; + + status = rpc_call_sync(mnt_clnt, &msg, 0); return status < 0? status : (result.status? -EACCES : 0); } @@ -137,6 +144,8 @@ static struct rpc_procinfo mnt_procedures[] = { .p_encode = (kxdrproc_t) xdr_encode_dirpath, .p_decode = (kxdrproc_t) xdr_decode_fhstatus, .p_bufsiz = MNT_dirpath_sz << 2, + .p_statidx = MNTPROC_MNT, + .p_name = "MOUNT", }, }; @@ -146,6 +155,8 @@ static struct rpc_procinfo mnt3_procedures[] = { .p_encode = (kxdrproc_t) xdr_encode_dirpath, .p_decode = (kxdrproc_t) xdr_decode_fhstatus3, .p_bufsiz = MNT_dirpath_sz << 2, + .p_statidx = MOUNTPROC3_MNT, + .p_name = "MOUNT", }, }; diff --git a/fs/nfs/nfs2xdr.c b/fs/nfs/nfs2xdr.c index 6548a65..f0015fa 100644 --- a/fs/nfs/nfs2xdr.c +++ b/fs/nfs/nfs2xdr.c @@ -682,7 +682,9 @@ nfs_stat_to_errno(int stat) .p_encode = (kxdrproc_t) nfs_xdr_##argtype, \ .p_decode = (kxdrproc_t) nfs_xdr_##restype, \ .p_bufsiz = MAX(NFS_##argtype##_sz,NFS_##restype##_sz) << 2, \ - .p_timer = timer \ + .p_timer = timer, \ + .p_statidx = NFSPROC_##proc, \ + .p_name = #proc, \ } struct rpc_procinfo nfs_procedures[] = { PROC(GETATTR, fhandle, attrstat, 1), diff --git a/fs/nfs/nfs3acl.c b/fs/nfs/nfs3acl.c index 6a5bbc0..3328787 100644 --- a/fs/nfs/nfs3acl.c +++ b/fs/nfs/nfs3acl.c @@ -190,6 +190,10 @@ struct posix_acl *nfs3_proc_getacl(struct inode *inode, int type) struct nfs3_getaclres res = { .fattr = &fattr, }; + struct rpc_message msg = { + .rpc_argp = &args, + .rpc_resp = &res, + }; struct posix_acl *acl; int status, count; @@ -218,8 +222,8 @@ struct posix_acl *nfs3_proc_getacl(struct inode *inode, int type) return NULL; dprintk("NFS call getacl\n"); - status = rpc_call(server->client_acl, ACLPROC3_GETACL, - &args, &res, 0); + msg.rpc_proc = &server->client_acl->cl_procinfo[ACLPROC3_GETACL]; + status = rpc_call_sync(server->client_acl, &msg, 0); dprintk("NFS reply getacl: %d\n", status); /* pages may have been allocated at the xdr layer. */ @@ -286,6 +290,10 @@ static int nfs3_proc_setacls(struct inode *inode, struct posix_acl *acl, .acl_access = acl, .pages = pages, }; + struct rpc_message msg = { + .rpc_argp = &args, + .rpc_resp = &fattr, + }; int status, count; status = -EOPNOTSUPP; @@ -306,8 +314,8 @@ static int nfs3_proc_setacls(struct inode *inode, struct posix_acl *acl, dprintk("NFS call setacl\n"); nfs_begin_data_update(inode); - status = rpc_call(server->client_acl, ACLPROC3_SETACL, - &args, &fattr, 0); + msg.rpc_proc = &server->client_acl->cl_procinfo[ACLPROC3_SETACL]; + status = rpc_call_sync(server->client_acl, &msg, 0); spin_lock(&inode->i_lock); NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ACCESS; spin_unlock(&inode->i_lock); diff --git a/fs/nfs/nfs3proc.c b/fs/nfs/nfs3proc.c index ed67567..cf186f0 100644 --- a/fs/nfs/nfs3proc.c +++ b/fs/nfs/nfs3proc.c @@ -19,6 +19,8 @@ #include <linux/smp_lock.h> #include <linux/nfs_mount.h> +#include "iostat.h" + #define NFSDBG_FACILITY NFSDBG_PROC extern struct rpc_procinfo nfs3_procedures[]; @@ -41,27 +43,14 @@ nfs3_rpc_wrapper(struct rpc_clnt *clnt, struct rpc_message *msg, int flags) return res; } -static inline int -nfs3_rpc_call_wrapper(struct rpc_clnt *clnt, u32 proc, void *argp, void *resp, int flags) -{ - struct rpc_message msg = { - .rpc_proc = &clnt->cl_procinfo[proc], - .rpc_argp = argp, - .rpc_resp = resp, - }; - return nfs3_rpc_wrapper(clnt, &msg, flags); -} - -#define rpc_call(clnt, proc, argp, resp, flags) \ - nfs3_rpc_call_wrapper(clnt, proc, argp, resp, flags) -#define rpc_call_sync(clnt, msg, flags) \ - nfs3_rpc_wrapper(clnt, msg, flags) +#define rpc_call_sync(clnt, msg, flags) nfs3_rpc_wrapper(clnt, msg, flags) static int -nfs3_async_handle_jukebox(struct rpc_task *task) +nfs3_async_handle_jukebox(struct rpc_task *task, struct inode *inode) { if (task->tk_status != -EJUKEBOX) return 0; + nfs_inc_stats(inode, NFSIOS_DELAY); task->tk_status = 0; rpc_restart_call(task); rpc_delay(task, NFS_JUKEBOX_RETRY_TIME); @@ -72,14 +61,21 @@ static int do_proc_get_root(struct rpc_clnt *client, struct nfs_fh *fhandle, struct nfs_fsinfo *info) { + struct rpc_message msg = { + .rpc_proc = &nfs3_procedures[NFS3PROC_FSINFO], + .rpc_argp = fhandle, + .rpc_resp = info, + }; int status; dprintk("%s: call fsinfo\n", __FUNCTION__); nfs_fattr_init(info->fattr); - status = rpc_call(client, NFS3PROC_FSINFO, fhandle, info, 0); + status = rpc_call_sync(client, &msg, 0); dprintk("%s: reply fsinfo: %d\n", __FUNCTION__, status); if (!(info->fattr->valid & NFS_ATTR_FATTR)) { - status = rpc_call(client, NFS3PROC_GETATTR, fhandle, info->fattr, 0); + msg.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR]; + msg.rpc_resp = info->fattr; + status = rpc_call_sync(client, &msg, 0); dprintk("%s: reply getattr: %d\n", __FUNCTION__, status); } return status; @@ -107,12 +103,16 @@ static int nfs3_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr) { + struct rpc_message msg = { + .rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR], + .rpc_argp = fhandle, + .rpc_resp = fattr, + }; int status; dprintk("NFS call getattr\n"); nfs_fattr_init(fattr); - status = rpc_call(server->client, NFS3PROC_GETATTR, - fhandle, fattr, 0); + status = rpc_call_sync(server->client, &msg, 0); dprintk("NFS reply getattr: %d\n", status); return status; } @@ -126,11 +126,16 @@ nfs3_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, .fh = NFS_FH(inode), .sattr = sattr, }; + struct rpc_message msg = { + .rpc_proc = &nfs3_procedures[NFS3PROC_SETATTR], + .rpc_argp = &arg, + .rpc_resp = fattr, + }; int status; dprintk("NFS call setattr\n"); nfs_fattr_init(fattr); - status = rpc_call(NFS_CLIENT(inode), NFS3PROC_SETATTR, &arg, fattr, 0); + status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); if (status == 0) nfs_setattr_update_inode(inode, sattr); dprintk("NFS reply setattr: %d\n", status); @@ -152,15 +157,23 @@ nfs3_proc_lookup(struct inode *dir, struct qstr *name, .fh = fhandle, .fattr = fattr }; + struct rpc_message msg = { + .rpc_proc = &nfs3_procedures[NFS3PROC_LOOKUP], + .rpc_argp = &arg, + .rpc_resp = &res, + }; int status; dprintk("NFS call lookup %s\n", name->name); nfs_fattr_init(&dir_attr); nfs_fattr_init(fattr); - status = rpc_call(NFS_CLIENT(dir), NFS3PROC_LOOKUP, &arg, &res, 0); - if (status >= 0 && !(fattr->valid & NFS_ATTR_FATTR)) - status = rpc_call(NFS_CLIENT(dir), NFS3PROC_GETATTR, - fhandle, fattr, 0); + status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); + if (status >= 0 && !(fattr->valid & NFS_ATTR_FATTR)) { + msg.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR]; + msg.rpc_argp = fhandle; + msg.rpc_resp = fattr; + status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); + } dprintk("NFS reply lookup: %d\n", status); if (status >= 0) status = nfs_refresh_inode(dir, &dir_attr); @@ -180,7 +193,7 @@ static int nfs3_proc_access(struct inode *inode, struct nfs_access_entry *entry) .rpc_proc = &nfs3_procedures[NFS3PROC_ACCESS], .rpc_argp = &arg, .rpc_resp = &res, - .rpc_cred = entry->cred + .rpc_cred = entry->cred, }; int mode = entry->mask; int status; @@ -226,12 +239,16 @@ static int nfs3_proc_readlink(struct inode *inode, struct page *page, .pglen = pglen, .pages = &page }; + struct rpc_message msg = { + .rpc_proc = &nfs3_procedures[NFS3PROC_READLINK], + .rpc_argp = &args, + .rpc_resp = &fattr, + }; int status; dprintk("NFS call readlink\n"); nfs_fattr_init(&fattr); - status = rpc_call(NFS_CLIENT(inode), NFS3PROC_READLINK, - &args, &fattr, 0); + status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); nfs_refresh_inode(inode, &fattr); dprintk("NFS reply readlink: %d\n", status); return status; @@ -327,6 +344,11 @@ nfs3_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, .fh = &fhandle, .fattr = &fattr }; + struct rpc_message msg = { + .rpc_proc = &nfs3_procedures[NFS3PROC_CREATE], + .rpc_argp = &arg, + .rpc_resp = &res, + }; mode_t mode = sattr->ia_mode; int status; @@ -343,8 +365,8 @@ nfs3_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, again: nfs_fattr_init(&dir_attr); nfs_fattr_init(&fattr); - status = rpc_call(NFS_CLIENT(dir), NFS3PROC_CREATE, &arg, &res, 0); - nfs_post_op_update_inode(dir, &dir_attr); + status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); + nfs_refresh_inode(dir, &dir_attr); /* If the server doesn't support the exclusive creation semantics, * try again with simple 'guarded' mode. */ @@ -447,7 +469,7 @@ nfs3_proc_unlink_done(struct dentry *dir, struct rpc_task *task) struct rpc_message *msg = &task->tk_msg; struct nfs_fattr *dir_attr; - if (nfs3_async_handle_jukebox(task)) + if (nfs3_async_handle_jukebox(task, dir->d_inode)) return 1; if (msg->rpc_argp) { dir_attr = (struct nfs_fattr*)msg->rpc_resp; @@ -474,12 +496,17 @@ nfs3_proc_rename(struct inode *old_dir, struct qstr *old_name, .fromattr = &old_dir_attr, .toattr = &new_dir_attr }; + struct rpc_message msg = { + .rpc_proc = &nfs3_procedures[NFS3PROC_RENAME], + .rpc_argp = &arg, + .rpc_resp = &res, + }; int status; dprintk("NFS call rename %s -> %s\n", old_name->name, new_name->name); nfs_fattr_init(&old_dir_attr); nfs_fattr_init(&new_dir_attr); - status = rpc_call(NFS_CLIENT(old_dir), NFS3PROC_RENAME, &arg, &res, 0); + status = rpc_call_sync(NFS_CLIENT(old_dir), &msg, 0); nfs_post_op_update_inode(old_dir, &old_dir_attr); nfs_post_op_update_inode(new_dir, &new_dir_attr); dprintk("NFS reply rename: %d\n", status); @@ -500,12 +527,17 @@ nfs3_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) .dir_attr = &dir_attr, .fattr = &fattr }; + struct rpc_message msg = { + .rpc_proc = &nfs3_procedures[NFS3PROC_LINK], + .rpc_argp = &arg, + .rpc_resp = &res, + }; int status; dprintk("NFS call link %s\n", name->name); nfs_fattr_init(&dir_attr); nfs_fattr_init(&fattr); - status = rpc_call(NFS_CLIENT(inode), NFS3PROC_LINK, &arg, &res, 0); + status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); nfs_post_op_update_inode(dir, &dir_attr); nfs_post_op_update_inode(inode, &fattr); dprintk("NFS reply link: %d\n", status); @@ -531,6 +563,11 @@ nfs3_proc_symlink(struct inode *dir, struct qstr *name, struct qstr *path, .fh = fhandle, .fattr = fattr }; + struct rpc_message msg = { + .rpc_proc = &nfs3_procedures[NFS3PROC_SYMLINK], + .rpc_argp = &arg, + .rpc_resp = &res, + }; int status; if (path->len > NFS3_MAXPATHLEN) @@ -538,7 +575,7 @@ nfs3_proc_symlink(struct inode *dir, struct qstr *name, struct qstr *path, dprintk("NFS call symlink %s -> %s\n", name->name, path->name); nfs_fattr_init(&dir_attr); nfs_fattr_init(fattr); - status = rpc_call(NFS_CLIENT(dir), NFS3PROC_SYMLINK, &arg, &res, 0); + status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); nfs_post_op_update_inode(dir, &dir_attr); dprintk("NFS reply symlink: %d\n", status); return status; @@ -560,6 +597,11 @@ nfs3_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr) .fh = &fhandle, .fattr = &fattr }; + struct rpc_message msg = { + .rpc_proc = &nfs3_procedures[NFS3PROC_MKDIR], + .rpc_argp = &arg, + .rpc_resp = &res, + }; int mode = sattr->ia_mode; int status; @@ -569,7 +611,7 @@ nfs3_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr) nfs_fattr_init(&dir_attr); nfs_fattr_init(&fattr); - status = rpc_call(NFS_CLIENT(dir), NFS3PROC_MKDIR, &arg, &res, 0); + status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); nfs_post_op_update_inode(dir, &dir_attr); if (status != 0) goto out; @@ -591,11 +633,16 @@ nfs3_proc_rmdir(struct inode *dir, struct qstr *name) .name = name->name, .len = name->len }; + struct rpc_message msg = { + .rpc_proc = &nfs3_procedures[NFS3PROC_RMDIR], + .rpc_argp = &arg, + .rpc_resp = &dir_attr, + }; int status; dprintk("NFS call rmdir %s\n", name->name); nfs_fattr_init(&dir_attr); - status = rpc_call(NFS_CLIENT(dir), NFS3PROC_RMDIR, &arg, &dir_attr, 0); + status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); nfs_post_op_update_inode(dir, &dir_attr); dprintk("NFS reply rmdir: %d\n", status); return status; @@ -672,6 +719,11 @@ nfs3_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr, .fh = &fh, .fattr = &fattr }; + struct rpc_message msg = { + .rpc_proc = &nfs3_procedures[NFS3PROC_MKNOD], + .rpc_argp = &arg, + .rpc_resp = &res, + }; mode_t mode = sattr->ia_mode; int status; @@ -690,7 +742,7 @@ nfs3_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr, nfs_fattr_init(&dir_attr); nfs_fattr_init(&fattr); - status = rpc_call(NFS_CLIENT(dir), NFS3PROC_MKNOD, &arg, &res, 0); + status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); nfs_post_op_update_inode(dir, &dir_attr); if (status != 0) goto out; @@ -707,11 +759,16 @@ static int nfs3_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *stat) { + struct rpc_message msg = { + .rpc_proc = &nfs3_procedures[NFS3PROC_FSSTAT], + .rpc_argp = fhandle, + .rpc_resp = stat, + }; int status; dprintk("NFS call fsstat\n"); nfs_fattr_init(stat->fattr); - status = rpc_call(server->client, NFS3PROC_FSSTAT, fhandle, stat, 0); + status = rpc_call_sync(server->client, &msg, 0); dprintk("NFS reply statfs: %d\n", status); return status; } @@ -720,11 +777,16 @@ static int nfs3_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *info) { + struct rpc_message msg = { + .rpc_proc = &nfs3_procedures[NFS3PROC_FSINFO], + .rpc_argp = fhandle, + .rpc_resp = info, + }; int status; dprintk("NFS call fsinfo\n"); nfs_fattr_init(info->fattr); - status = rpc_call(server->client_sys, NFS3PROC_FSINFO, fhandle, info, 0); + status = rpc_call_sync(server->client_sys, &msg, 0); dprintk("NFS reply fsinfo: %d\n", status); return status; } @@ -733,40 +795,34 @@ static int nfs3_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_pathconf *info) { + struct rpc_message msg = { + .rpc_proc = &nfs3_procedures[NFS3PROC_PATHCONF], + .rpc_argp = fhandle, + .rpc_resp = info, + }; int status; dprintk("NFS call pathconf\n"); nfs_fattr_init(info->fattr); - status = rpc_call(server->client, NFS3PROC_PATHCONF, fhandle, info, 0); + status = rpc_call_sync(server->client, &msg, 0); dprintk("NFS reply pathconf: %d\n", status); return status; } extern u32 *nfs3_decode_dirent(u32 *, struct nfs_entry *, int); -static void nfs3_read_done(struct rpc_task *task, void *calldata) +static int nfs3_read_done(struct rpc_task *task, struct nfs_read_data *data) { - struct nfs_read_data *data = calldata; - - if (nfs3_async_handle_jukebox(task)) - return; + if (nfs3_async_handle_jukebox(task, data->inode)) + return -EAGAIN; /* Call back common NFS readpage processing */ if (task->tk_status >= 0) nfs_refresh_inode(data->inode, &data->fattr); - nfs_readpage_result(task, calldata); + return 0; } -static const struct rpc_call_ops nfs3_read_ops = { - .rpc_call_done = nfs3_read_done, - .rpc_release = nfs_readdata_release, -}; - -static void -nfs3_proc_read_setup(struct nfs_read_data *data) +static void nfs3_proc_read_setup(struct nfs_read_data *data) { - struct rpc_task *task = &data->task; - struct inode *inode = data->inode; - int flags; struct rpc_message msg = { .rpc_proc = &nfs3_procedures[NFS3PROC_READ], .rpc_argp = &data->args, @@ -774,37 +830,20 @@ nfs3_proc_read_setup(struct nfs_read_data *data) .rpc_cred = data->cred, }; - /* N.B. Do we need to test? Never called for swapfile inode */ - flags = RPC_TASK_ASYNC | (IS_SWAPFILE(inode)? NFS_RPC_SWAPFLAGS : 0); - - /* Finalize the task. */ - rpc_init_task(task, NFS_CLIENT(inode), flags, &nfs3_read_ops, data); - rpc_call_setup(task, &msg, 0); + rpc_call_setup(&data->task, &msg, 0); } -static void nfs3_write_done(struct rpc_task *task, void *calldata) +static int nfs3_write_done(struct rpc_task *task, struct nfs_write_data *data) { - struct nfs_write_data *data = calldata; - - if (nfs3_async_handle_jukebox(task)) - return; + if (nfs3_async_handle_jukebox(task, data->inode)) + return -EAGAIN; if (task->tk_status >= 0) nfs_post_op_update_inode(data->inode, data->res.fattr); - nfs_writeback_done(task, calldata); + return 0; } -static const struct rpc_call_ops nfs3_write_ops = { - .rpc_call_done = nfs3_write_done, - .rpc_release = nfs_writedata_release, -}; - -static void -nfs3_proc_write_setup(struct nfs_write_data *data, int how) +static void nfs3_proc_write_setup(struct nfs_write_data *data, int how) { - struct rpc_task *task = &data->task; - struct inode *inode = data->inode; - int stable; - int flags; struct rpc_message msg = { .rpc_proc = &nfs3_procedures[NFS3PROC_WRITE], .rpc_argp = &data->args, @@ -812,45 +851,28 @@ nfs3_proc_write_setup(struct nfs_write_data *data, int how) .rpc_cred = data->cred, }; + data->args.stable = NFS_UNSTABLE; if (how & FLUSH_STABLE) { - if (!NFS_I(inode)->ncommit) - stable = NFS_FILE_SYNC; - else - stable = NFS_DATA_SYNC; - } else - stable = NFS_UNSTABLE; - data->args.stable = stable; - - /* Set the initial flags for the task. */ - flags = (how & FLUSH_SYNC) ? 0 : RPC_TASK_ASYNC; + data->args.stable = NFS_FILE_SYNC; + if (NFS_I(data->inode)->ncommit) + data->args.stable = NFS_DATA_SYNC; + } /* Finalize the task. */ - rpc_init_task(task, NFS_CLIENT(inode), flags, &nfs3_write_ops, data); - rpc_call_setup(task, &msg, 0); + rpc_call_setup(&data->task, &msg, 0); } -static void nfs3_commit_done(struct rpc_task *task, void *calldata) +static int nfs3_commit_done(struct rpc_task *task, struct nfs_write_data *data) { - struct nfs_write_data *data = calldata; - - if (nfs3_async_handle_jukebox(task)) - return; + if (nfs3_async_handle_jukebox(task, data->inode)) + return -EAGAIN; if (task->tk_status >= 0) nfs_post_op_update_inode(data->inode, data->res.fattr); - nfs_commit_done(task, calldata); + return 0; } -static const struct rpc_call_ops nfs3_commit_ops = { - .rpc_call_done = nfs3_commit_done, - .rpc_release = nfs_commit_release, -}; - -static void -nfs3_proc_commit_setup(struct nfs_write_data *data, int how) +static void nfs3_proc_commit_setup(struct nfs_write_data *data, int how) { - struct rpc_task *task = &data->task; - struct inode *inode = data->inode; - int flags; struct rpc_message msg = { .rpc_proc = &nfs3_procedures[NFS3PROC_COMMIT], .rpc_argp = &data->args, @@ -858,12 +880,7 @@ nfs3_proc_commit_setup(struct nfs_write_data *data, int how) .rpc_cred = data->cred, }; - /* Set the initial flags for the task. */ - flags = (how & FLUSH_SYNC) ? 0 : RPC_TASK_ASYNC; - - /* Finalize the task. */ - rpc_init_task(task, NFS_CLIENT(inode), flags, &nfs3_commit_ops, data); - rpc_call_setup(task, &msg, 0); + rpc_call_setup(&data->task, &msg, 0); } static int @@ -902,8 +919,11 @@ struct nfs_rpc_ops nfs_v3_clientops = { .pathconf = nfs3_proc_pathconf, .decode_dirent = nfs3_decode_dirent, .read_setup = nfs3_proc_read_setup, + .read_done = nfs3_read_done, .write_setup = nfs3_proc_write_setup, + .write_done = nfs3_write_done, .commit_setup = nfs3_proc_commit_setup, + .commit_done = nfs3_commit_done, .file_open = nfs_open, .file_release = nfs_release, .lock = nfs3_proc_lock, diff --git a/fs/nfs/nfs3xdr.c b/fs/nfs/nfs3xdr.c index 5224a19..ec23361 100644 --- a/fs/nfs/nfs3xdr.c +++ b/fs/nfs/nfs3xdr.c @@ -1109,7 +1109,9 @@ nfs3_xdr_setaclres(struct rpc_rqst *req, u32 *p, struct nfs_fattr *fattr) .p_encode = (kxdrproc_t) nfs3_xdr_##argtype, \ .p_decode = (kxdrproc_t) nfs3_xdr_##restype, \ .p_bufsiz = MAX(NFS3_##argtype##_sz,NFS3_##restype##_sz) << 2, \ - .p_timer = timer \ + .p_timer = timer, \ + .p_statidx = NFS3PROC_##proc, \ + .p_name = #proc, \ } struct rpc_procinfo nfs3_procedures[] = { @@ -1150,6 +1152,7 @@ static struct rpc_procinfo nfs3_acl_procedures[] = { .p_decode = (kxdrproc_t) nfs3_xdr_getaclres, .p_bufsiz = MAX(ACL3_getaclargs_sz, ACL3_getaclres_sz) << 2, .p_timer = 1, + .p_name = "GETACL", }, [ACLPROC3_SETACL] = { .p_proc = ACLPROC3_SETACL, @@ -1157,6 +1160,7 @@ static struct rpc_procinfo nfs3_acl_procedures[] = { .p_decode = (kxdrproc_t) nfs3_xdr_setaclres, .p_bufsiz = MAX(ACL3_setaclargs_sz, ACL3_setaclres_sz) << 2, .p_timer = 0, + .p_name = "SETACL", }, }; diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c index f8c0066..47ece1d 100644 --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -51,6 +51,7 @@ #include "nfs4_fs.h" #include "delegation.h" +#include "iostat.h" #define NFSDBG_FACILITY NFSDBG_PROC @@ -335,7 +336,7 @@ static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data if (!(data->f_attr.valid & NFS_ATTR_FATTR)) goto out; inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr); - if (inode == NULL) + if (IS_ERR(inode)) goto out; state = nfs4_get_open_state(inode, data->owner); if (state == NULL) @@ -604,11 +605,14 @@ static int _nfs4_proc_open_confirm(struct nfs4_opendata *data) int status; atomic_inc(&data->count); + /* + * If rpc_run_task() ends up calling ->rpc_release(), we + * want to ensure that it takes the 'error' code path. + */ + data->rpc_status = -ENOMEM; task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_open_confirm_ops, data); - if (IS_ERR(task)) { - nfs4_opendata_free(data); + if (IS_ERR(task)) return PTR_ERR(task); - } status = nfs4_wait_for_completion_rpc_task(task); if (status != 0) { data->cancelled = 1; @@ -707,11 +711,14 @@ static int _nfs4_proc_open(struct nfs4_opendata *data) int status; atomic_inc(&data->count); + /* + * If rpc_run_task() ends up calling ->rpc_release(), we + * want to ensure that it takes the 'error' code path. + */ + data->rpc_status = -ENOMEM; task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_open_ops, data); - if (IS_ERR(task)) { - nfs4_opendata_free(data); + if (IS_ERR(task)) return PTR_ERR(task); - } status = nfs4_wait_for_completion_rpc_task(task); if (status != 0) { data->cancelled = 1; @@ -908,7 +915,7 @@ out_put_state_owner: static struct nfs4_state *nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred *cred) { struct nfs4_exception exception = { }; - struct nfs4_state *res; + struct nfs4_state *res = ERR_PTR(-EIO); int err; do { @@ -1017,12 +1024,12 @@ static struct nfs4_state *nfs4_do_open(struct inode *dir, struct dentry *dentry, return res; } -static int _nfs4_do_setattr(struct nfs_server *server, struct nfs_fattr *fattr, - struct nfs_fh *fhandle, struct iattr *sattr, - struct nfs4_state *state) +static int _nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr, + struct iattr *sattr, struct nfs4_state *state) { + struct nfs_server *server = NFS_SERVER(inode); struct nfs_setattrargs arg = { - .fh = fhandle, + .fh = NFS_FH(inode), .iap = sattr, .server = server, .bitmask = server->attr_bitmask, @@ -1041,7 +1048,9 @@ static int _nfs4_do_setattr(struct nfs_server *server, struct nfs_fattr *fattr, nfs_fattr_init(fattr); - if (state != NULL) { + if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) { + /* Use that stateid */ + } else if (state != NULL) { msg.rpc_cred = state->owner->so_cred; nfs4_copy_stateid(&arg.stateid, state, current->files); } else @@ -1053,16 +1062,15 @@ static int _nfs4_do_setattr(struct nfs_server *server, struct nfs_fattr *fattr, return status; } -static int nfs4_do_setattr(struct nfs_server *server, struct nfs_fattr *fattr, - struct nfs_fh *fhandle, struct iattr *sattr, - struct nfs4_state *state) +static int nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr, + struct iattr *sattr, struct nfs4_state *state) { + struct nfs_server *server = NFS_SERVER(inode); struct nfs4_exception exception = { }; int err; do { err = nfs4_handle_exception(server, - _nfs4_do_setattr(server, fattr, fhandle, sattr, - state), + _nfs4_do_setattr(inode, fattr, sattr, state), &exception); } while (exception.retry); return err; @@ -1503,8 +1511,7 @@ nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, if (ctx != NULL) state = ctx->state; - status = nfs4_do_setattr(NFS_SERVER(inode), fattr, - NFS_FH(inode), sattr, state); + status = nfs4_do_setattr(inode, fattr, sattr, state); if (status == 0) nfs_setattr_update_inode(inode, sattr); if (ctx != NULL) @@ -1823,8 +1830,7 @@ nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, d_instantiate(dentry, igrab(state->inode)); if (flags & O_EXCL) { struct nfs_fattr fattr; - status = nfs4_do_setattr(NFS_SERVER(dir), &fattr, - NFS_FH(state->inode), sattr, state); + status = nfs4_do_setattr(state->inode, &fattr, sattr, state); if (status == 0) nfs_setattr_update_inode(state->inode, sattr); } @@ -2344,75 +2350,50 @@ static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, return err; } -static void nfs4_read_done(struct rpc_task *task, void *calldata) +static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data) { - struct nfs_read_data *data = calldata; - struct inode *inode = data->inode; + struct nfs_server *server = NFS_SERVER(data->inode); - if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) { + if (nfs4_async_handle_error(task, server) == -EAGAIN) { rpc_restart_call(task); - return; + return -EAGAIN; } if (task->tk_status > 0) - renew_lease(NFS_SERVER(inode), data->timestamp); - /* Call back common NFS readpage processing */ - nfs_readpage_result(task, calldata); + renew_lease(server, data->timestamp); + return 0; } -static const struct rpc_call_ops nfs4_read_ops = { - .rpc_call_done = nfs4_read_done, - .rpc_release = nfs_readdata_release, -}; - -static void -nfs4_proc_read_setup(struct nfs_read_data *data) +static void nfs4_proc_read_setup(struct nfs_read_data *data) { - struct rpc_task *task = &data->task; struct rpc_message msg = { .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ], .rpc_argp = &data->args, .rpc_resp = &data->res, .rpc_cred = data->cred, }; - struct inode *inode = data->inode; - int flags; data->timestamp = jiffies; - /* N.B. Do we need to test? Never called for swapfile inode */ - flags = RPC_TASK_ASYNC | (IS_SWAPFILE(inode)? NFS_RPC_SWAPFLAGS : 0); - - /* Finalize the task. */ - rpc_init_task(task, NFS_CLIENT(inode), flags, &nfs4_read_ops, data); - rpc_call_setup(task, &msg, 0); + rpc_call_setup(&data->task, &msg, 0); } -static void nfs4_write_done(struct rpc_task *task, void *calldata) +static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data) { - struct nfs_write_data *data = calldata; struct inode *inode = data->inode; if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) { rpc_restart_call(task); - return; + return -EAGAIN; } if (task->tk_status >= 0) { renew_lease(NFS_SERVER(inode), data->timestamp); nfs_post_op_update_inode(inode, data->res.fattr); } - /* Call back common NFS writeback processing */ - nfs_writeback_done(task, calldata); + return 0; } -static const struct rpc_call_ops nfs4_write_ops = { - .rpc_call_done = nfs4_write_done, - .rpc_release = nfs_writedata_release, -}; - -static void -nfs4_proc_write_setup(struct nfs_write_data *data, int how) +static void nfs4_proc_write_setup(struct nfs_write_data *data, int how) { - struct rpc_task *task = &data->task; struct rpc_message msg = { .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE], .rpc_argp = &data->args, @@ -2422,7 +2403,6 @@ nfs4_proc_write_setup(struct nfs_write_data *data, int how) struct inode *inode = data->inode; struct nfs_server *server = NFS_SERVER(inode); int stable; - int flags; if (how & FLUSH_STABLE) { if (!NFS_I(inode)->ncommit) @@ -2437,57 +2417,37 @@ nfs4_proc_write_setup(struct nfs_write_data *data, int how) data->timestamp = jiffies; - /* Set the initial flags for the task. */ - flags = (how & FLUSH_SYNC) ? 0 : RPC_TASK_ASYNC; - /* Finalize the task. */ - rpc_init_task(task, NFS_CLIENT(inode), flags, &nfs4_write_ops, data); - rpc_call_setup(task, &msg, 0); + rpc_call_setup(&data->task, &msg, 0); } -static void nfs4_commit_done(struct rpc_task *task, void *calldata) +static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data) { - struct nfs_write_data *data = calldata; struct inode *inode = data->inode; if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) { rpc_restart_call(task); - return; + return -EAGAIN; } if (task->tk_status >= 0) nfs_post_op_update_inode(inode, data->res.fattr); - /* Call back common NFS writeback processing */ - nfs_commit_done(task, calldata); + return 0; } -static const struct rpc_call_ops nfs4_commit_ops = { - .rpc_call_done = nfs4_commit_done, - .rpc_release = nfs_commit_release, -}; - -static void -nfs4_proc_commit_setup(struct nfs_write_data *data, int how) +static void nfs4_proc_commit_setup(struct nfs_write_data *data, int how) { - struct rpc_task *task = &data->task; struct rpc_message msg = { .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT], .rpc_argp = &data->args, .rpc_resp = &data->res, .rpc_cred = data->cred, }; - struct inode *inode = data->inode; - struct nfs_server *server = NFS_SERVER(inode); - int flags; + struct nfs_server *server = NFS_SERVER(data->inode); data->args.bitmask = server->attr_bitmask; data->res.server = server; - /* Set the initial flags for the task. */ - flags = (how & FLUSH_SYNC) ? 0 : RPC_TASK_ASYNC; - - /* Finalize the task. */ - rpc_init_task(task, NFS_CLIENT(inode), flags, &nfs4_commit_ops, data); - rpc_call_setup(task, &msg, 0); + rpc_call_setup(&data->task, &msg, 0); } /* @@ -2755,8 +2715,10 @@ nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server) rpc_wake_up_task(task); task->tk_status = 0; return -EAGAIN; - case -NFS4ERR_GRACE: case -NFS4ERR_DELAY: + nfs_inc_server_stats((struct nfs_server *) server, + NFSIOS_DELAY); + case -NFS4ERR_GRACE: rpc_delay(task, NFS4_POLL_RETRY_MAX); task->tk_status = 0; return -EAGAIN; @@ -2893,8 +2855,7 @@ int nfs4_proc_setclientid(struct nfs4_client *clp, u32 program, unsigned short p return status; } -int -nfs4_proc_setclientid_confirm(struct nfs4_client *clp, struct rpc_cred *cred) +static int _nfs4_proc_setclientid_confirm(struct nfs4_client *clp, struct rpc_cred *cred) { struct nfs_fsinfo fsinfo; struct rpc_message msg = { @@ -2918,6 +2879,24 @@ nfs4_proc_setclientid_confirm(struct nfs4_client *clp, struct rpc_cred *cred) return status; } +int nfs4_proc_setclientid_confirm(struct nfs4_client *clp, struct rpc_cred *cred) +{ + long timeout; + int err; + do { + err = _nfs4_proc_setclientid_confirm(clp, cred); + switch (err) { + case 0: + return err; + case -NFS4ERR_RESOURCE: + /* The IBM lawyers misread another document! */ + case -NFS4ERR_DELAY: + err = nfs4_delay(clp->cl_rpcclient, &timeout); + } + } while (err == 0); + return err; +} + struct nfs4_delegreturndata { struct nfs4_delegreturnargs args; struct nfs4_delegreturnres res; @@ -2958,7 +2937,7 @@ static void nfs4_delegreturn_release(void *calldata) kfree(calldata); } -const static struct rpc_call_ops nfs4_delegreturn_ops = { +static const struct rpc_call_ops nfs4_delegreturn_ops = { .rpc_call_prepare = nfs4_delegreturn_prepare, .rpc_call_done = nfs4_delegreturn_done, .rpc_release = nfs4_delegreturn_release, @@ -2986,10 +2965,8 @@ static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, co data->rpc_status = 0; task = rpc_run_task(NFS_CLIENT(inode), RPC_TASK_ASYNC, &nfs4_delegreturn_ops, data); - if (IS_ERR(task)) { - nfs4_delegreturn_release(data); + if (IS_ERR(task)) return PTR_ERR(task); - } status = nfs4_wait_for_completion_rpc_task(task); if (status == 0) { status = data->rpc_status; @@ -3209,7 +3186,6 @@ static struct rpc_task *nfs4_do_unlck(struct file_lock *fl, struct nfs_seqid *seqid) { struct nfs4_unlockdata *data; - struct rpc_task *task; data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid); if (data == NULL) { @@ -3219,10 +3195,7 @@ static struct rpc_task *nfs4_do_unlck(struct file_lock *fl, /* Unlock _before_ we do the RPC call */ do_vfs_lock(fl->fl_file, fl); - task = rpc_run_task(NFS_CLIENT(lsp->ls_state->inode), RPC_TASK_ASYNC, &nfs4_locku_ops, data); - if (IS_ERR(task)) - nfs4_locku_release_calldata(data); - return task; + return rpc_run_task(NFS_CLIENT(lsp->ls_state->inode), RPC_TASK_ASYNC, &nfs4_locku_ops, data); } static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request) @@ -3403,10 +3376,8 @@ static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *f data->arg.reclaim = 1; task = rpc_run_task(NFS_CLIENT(state->inode), RPC_TASK_ASYNC, &nfs4_lock_ops, data); - if (IS_ERR(task)) { - nfs4_lock_release(data); + if (IS_ERR(task)) return PTR_ERR(task); - } ret = nfs4_wait_for_completion_rpc_task(task); if (ret == 0) { ret = data->rpc_status; @@ -3588,6 +3559,8 @@ ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen) { size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1; + if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode))) + return 0; if (buf && buflen < len) return -ERANGE; if (buf) @@ -3644,8 +3617,11 @@ struct nfs_rpc_ops nfs_v4_clientops = { .pathconf = nfs4_proc_pathconf, .decode_dirent = nfs4_decode_dirent, .read_setup = nfs4_proc_read_setup, + .read_done = nfs4_read_done, .write_setup = nfs4_proc_write_setup, + .write_done = nfs4_write_done, .commit_setup = nfs4_proc_commit_setup, + .commit_done = nfs4_commit_done, .file_open = nfs_open, .file_release = nfs_release, .lock = nfs4_proc_lock, diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c index afad025..96e5b82 100644 --- a/fs/nfs/nfs4state.c +++ b/fs/nfs/nfs4state.c @@ -977,6 +977,7 @@ out: 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); + set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); goto out; } diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c index 0a1bd36..7c5d70e 100644 --- a/fs/nfs/nfs4xdr.c +++ b/fs/nfs/nfs4xdr.c @@ -4344,6 +4344,8 @@ nfs_stat_to_errno(int stat) .p_encode = (kxdrproc_t) nfs4_xdr_##argtype, \ .p_decode = (kxdrproc_t) nfs4_xdr_##restype, \ .p_bufsiz = MAX(NFS4_##argtype##_sz,NFS4_##restype##_sz) << 2, \ + .p_statidx = NFSPROC4_CLNT_##proc, \ + .p_name = #proc, \ } struct rpc_procinfo nfs4_procedures[] = { diff --git a/fs/nfs/pagelist.c b/fs/nfs/pagelist.c index d53857b..106aca3 100644 --- a/fs/nfs/pagelist.c +++ b/fs/nfs/pagelist.c @@ -85,6 +85,9 @@ nfs_create_request(struct nfs_open_context *ctx, struct inode *inode, atomic_set(&req->wb_complete, 0); req->wb_index = page->index; page_cache_get(page); + BUG_ON(PagePrivate(page)); + BUG_ON(!PageLocked(page)); + BUG_ON(page->mapping->host != inode); req->wb_offset = offset; req->wb_pgbase = offset; req->wb_bytes = count; @@ -132,9 +135,11 @@ void nfs_clear_page_writeback(struct nfs_page *req) { struct nfs_inode *nfsi = NFS_I(req->wb_context->dentry->d_inode); - spin_lock(&nfsi->req_lock); - radix_tree_tag_clear(&nfsi->nfs_page_tree, req->wb_index, NFS_PAGE_TAG_WRITEBACK); - spin_unlock(&nfsi->req_lock); + if (req->wb_page != NULL) { + spin_lock(&nfsi->req_lock); + radix_tree_tag_clear(&nfsi->nfs_page_tree, req->wb_index, NFS_PAGE_TAG_WRITEBACK); + spin_unlock(&nfsi->req_lock); + } nfs_unlock_request(req); } @@ -147,8 +152,9 @@ void nfs_clear_page_writeback(struct nfs_page *req) */ void nfs_clear_request(struct nfs_page *req) { - if (req->wb_page) { - page_cache_release(req->wb_page); + struct page *page = req->wb_page; + if (page != NULL) { + page_cache_release(page); req->wb_page = NULL; } } diff --git a/fs/nfs/proc.c b/fs/nfs/proc.c index f5150d7..9dd85ca 100644 --- a/fs/nfs/proc.c +++ b/fs/nfs/proc.c @@ -58,16 +58,23 @@ nfs_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle, { struct nfs_fattr *fattr = info->fattr; struct nfs2_fsstat fsinfo; + struct rpc_message msg = { + .rpc_proc = &nfs_procedures[NFSPROC_GETATTR], + .rpc_argp = fhandle, + .rpc_resp = fattr, + }; int status; dprintk("%s: call getattr\n", __FUNCTION__); nfs_fattr_init(fattr); - status = rpc_call(server->client_sys, NFSPROC_GETATTR, fhandle, fattr, 0); + status = rpc_call_sync(server->client_sys, &msg, 0); dprintk("%s: reply getattr: %d\n", __FUNCTION__, status); if (status) return status; dprintk("%s: call statfs\n", __FUNCTION__); - status = rpc_call(server->client_sys, NFSPROC_STATFS, fhandle, &fsinfo, 0); + msg.rpc_proc = &nfs_procedures[NFSPROC_STATFS]; + msg.rpc_resp = &fsinfo; + status = rpc_call_sync(server->client_sys, &msg, 0); dprintk("%s: reply statfs: %d\n", __FUNCTION__, status); if (status) return status; @@ -90,12 +97,16 @@ static int nfs_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr) { + struct rpc_message msg = { + .rpc_proc = &nfs_procedures[NFSPROC_GETATTR], + .rpc_argp = fhandle, + .rpc_resp = fattr, + }; int status; dprintk("NFS call getattr\n"); nfs_fattr_init(fattr); - status = rpc_call(server->client, NFSPROC_GETATTR, - fhandle, fattr, 0); + status = rpc_call_sync(server->client, &msg, 0); dprintk("NFS reply getattr: %d\n", status); return status; } @@ -109,6 +120,11 @@ nfs_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, .fh = NFS_FH(inode), .sattr = sattr }; + struct rpc_message msg = { + .rpc_proc = &nfs_procedures[NFSPROC_SETATTR], + .rpc_argp = &arg, + .rpc_resp = fattr, + }; int status; /* Mask out the non-modebit related stuff from attr->ia_mode */ @@ -116,7 +132,7 @@ nfs_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, dprintk("NFS call setattr\n"); nfs_fattr_init(fattr); - status = rpc_call(NFS_CLIENT(inode), NFSPROC_SETATTR, &arg, fattr, 0); + status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); if (status == 0) nfs_setattr_update_inode(inode, sattr); dprintk("NFS reply setattr: %d\n", status); @@ -136,11 +152,16 @@ nfs_proc_lookup(struct inode *dir, struct qstr *name, .fh = fhandle, .fattr = fattr }; + struct rpc_message msg = { + .rpc_proc = &nfs_procedures[NFSPROC_LOOKUP], + .rpc_argp = &arg, + .rpc_resp = &res, + }; int status; dprintk("NFS call lookup %s\n", name->name); nfs_fattr_init(fattr); - status = rpc_call(NFS_CLIENT(dir), NFSPROC_LOOKUP, &arg, &res, 0); + status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); dprintk("NFS reply lookup: %d\n", status); return status; } @@ -154,10 +175,14 @@ static int nfs_proc_readlink(struct inode *inode, struct page *page, .pglen = pglen, .pages = &page }; + struct rpc_message msg = { + .rpc_proc = &nfs_procedures[NFSPROC_READLINK], + .rpc_argp = &args, + }; int status; dprintk("NFS call readlink\n"); - status = rpc_call(NFS_CLIENT(inode), NFSPROC_READLINK, &args, NULL, 0); + status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); dprintk("NFS reply readlink: %d\n", status); return status; } @@ -233,11 +258,16 @@ nfs_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, .fh = &fhandle, .fattr = &fattr }; + struct rpc_message msg = { + .rpc_proc = &nfs_procedures[NFSPROC_CREATE], + .rpc_argp = &arg, + .rpc_resp = &res, + }; int status; nfs_fattr_init(&fattr); dprintk("NFS call create %s\n", dentry->d_name.name); - status = rpc_call(NFS_CLIENT(dir), NFSPROC_CREATE, &arg, &res, 0); + status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); if (status == 0) status = nfs_instantiate(dentry, &fhandle, &fattr); dprintk("NFS reply create: %d\n", status); @@ -263,6 +293,11 @@ nfs_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr, .fh = &fhandle, .fattr = &fattr }; + struct rpc_message msg = { + .rpc_proc = &nfs_procedures[NFSPROC_CREATE], + .rpc_argp = &arg, + .rpc_resp = &res, + }; int status, mode; dprintk("NFS call mknod %s\n", dentry->d_name.name); @@ -277,13 +312,13 @@ nfs_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr, } nfs_fattr_init(&fattr); - status = rpc_call(NFS_CLIENT(dir), NFSPROC_CREATE, &arg, &res, 0); + status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); nfs_mark_for_revalidate(dir); if (status == -EINVAL && S_ISFIFO(mode)) { sattr->ia_mode = mode; nfs_fattr_init(&fattr); - status = rpc_call(NFS_CLIENT(dir), NFSPROC_CREATE, &arg, &res, 0); + status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); } if (status == 0) status = nfs_instantiate(dentry, &fhandle, &fattr); @@ -302,8 +337,6 @@ nfs_proc_remove(struct inode *dir, struct qstr *name) struct rpc_message msg = { .rpc_proc = &nfs_procedures[NFSPROC_REMOVE], .rpc_argp = &arg, - .rpc_resp = NULL, - .rpc_cred = NULL }; int status; @@ -355,10 +388,14 @@ nfs_proc_rename(struct inode *old_dir, struct qstr *old_name, .toname = new_name->name, .tolen = new_name->len }; + struct rpc_message msg = { + .rpc_proc = &nfs_procedures[NFSPROC_RENAME], + .rpc_argp = &arg, + }; int status; dprintk("NFS call rename %s -> %s\n", old_name->name, new_name->name); - status = rpc_call(NFS_CLIENT(old_dir), NFSPROC_RENAME, &arg, NULL, 0); + status = rpc_call_sync(NFS_CLIENT(old_dir), &msg, 0); nfs_mark_for_revalidate(old_dir); nfs_mark_for_revalidate(new_dir); dprintk("NFS reply rename: %d\n", status); @@ -374,10 +411,14 @@ nfs_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) .toname = name->name, .tolen = name->len }; + struct rpc_message msg = { + .rpc_proc = &nfs_procedures[NFSPROC_LINK], + .rpc_argp = &arg, + }; int status; dprintk("NFS call link %s\n", name->name); - status = rpc_call(NFS_CLIENT(inode), NFSPROC_LINK, &arg, NULL, 0); + status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); nfs_mark_for_revalidate(inode); nfs_mark_for_revalidate(dir); dprintk("NFS reply link: %d\n", status); @@ -397,6 +438,10 @@ nfs_proc_symlink(struct inode *dir, struct qstr *name, struct qstr *path, .tolen = path->len, .sattr = sattr }; + struct rpc_message msg = { + .rpc_proc = &nfs_procedures[NFSPROC_SYMLINK], + .rpc_argp = &arg, + }; int status; if (path->len > NFS2_MAXPATHLEN) @@ -404,7 +449,7 @@ nfs_proc_symlink(struct inode *dir, struct qstr *name, struct qstr *path, dprintk("NFS call symlink %s -> %s\n", name->name, path->name); nfs_fattr_init(fattr); fhandle->size = 0; - status = rpc_call(NFS_CLIENT(dir), NFSPROC_SYMLINK, &arg, NULL, 0); + status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); nfs_mark_for_revalidate(dir); dprintk("NFS reply symlink: %d\n", status); return status; @@ -425,11 +470,16 @@ nfs_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr) .fh = &fhandle, .fattr = &fattr }; + struct rpc_message msg = { + .rpc_proc = &nfs_procedures[NFSPROC_MKDIR], + .rpc_argp = &arg, + .rpc_resp = &res, + }; int status; dprintk("NFS call mkdir %s\n", dentry->d_name.name); nfs_fattr_init(&fattr); - status = rpc_call(NFS_CLIENT(dir), NFSPROC_MKDIR, &arg, &res, 0); + status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); nfs_mark_for_revalidate(dir); if (status == 0) status = nfs_instantiate(dentry, &fhandle, &fattr); @@ -445,10 +495,14 @@ nfs_proc_rmdir(struct inode *dir, struct qstr *name) .name = name->name, .len = name->len }; + struct rpc_message msg = { + .rpc_proc = &nfs_procedures[NFSPROC_RMDIR], + .rpc_argp = &arg, + }; int status; dprintk("NFS call rmdir %s\n", name->name); - status = rpc_call(NFS_CLIENT(dir), NFSPROC_RMDIR, &arg, NULL, 0); + status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); nfs_mark_for_revalidate(dir); dprintk("NFS reply rmdir: %d\n", status); return status; @@ -470,13 +524,12 @@ nfs_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, .fh = NFS_FH(dir), .cookie = cookie, .count = count, - .pages = &page + .pages = &page, }; struct rpc_message msg = { .rpc_proc = &nfs_procedures[NFSPROC_READDIR], .rpc_argp = &arg, - .rpc_resp = NULL, - .rpc_cred = cred + .rpc_cred = cred, }; int status; @@ -495,11 +548,16 @@ nfs_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *stat) { struct nfs2_fsstat fsinfo; + struct rpc_message msg = { + .rpc_proc = &nfs_procedures[NFSPROC_STATFS], + .rpc_argp = fhandle, + .rpc_resp = &fsinfo, + }; int status; dprintk("NFS call statfs\n"); nfs_fattr_init(stat->fattr); - status = rpc_call(server->client, NFSPROC_STATFS, fhandle, &fsinfo, 0); + status = rpc_call_sync(server->client, &msg, 0); dprintk("NFS reply statfs: %d\n", status); if (status) goto out; @@ -518,11 +576,16 @@ nfs_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *info) { struct nfs2_fsstat fsinfo; + struct rpc_message msg = { + .rpc_proc = &nfs_procedures[NFSPROC_STATFS], + .rpc_argp = fhandle, + .rpc_resp = &fsinfo, + }; int status; dprintk("NFS call fsinfo\n"); nfs_fattr_init(info->fattr); - status = rpc_call(server->client, NFSPROC_STATFS, fhandle, &fsinfo, 0); + status = rpc_call_sync(server->client, &msg, 0); dprintk("NFS reply fsinfo: %d\n", status); if (status) goto out; @@ -550,10 +613,8 @@ nfs_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, extern u32 * nfs_decode_dirent(u32 *, struct nfs_entry *, int); -static void nfs_read_done(struct rpc_task *task, void *calldata) +static int nfs_read_done(struct rpc_task *task, struct nfs_read_data *data) { - struct nfs_read_data *data = calldata; - if (task->tk_status >= 0) { nfs_refresh_inode(data->inode, data->res.fattr); /* Emulate the eof flag, which isn't normally needed in NFSv2 @@ -562,20 +623,11 @@ static void nfs_read_done(struct rpc_task *task, void *calldata) if (data->args.offset + data->args.count >= data->res.fattr->size) data->res.eof = 1; } - nfs_readpage_result(task, calldata); + return 0; } -static const struct rpc_call_ops nfs_read_ops = { - .rpc_call_done = nfs_read_done, - .rpc_release = nfs_readdata_release, -}; - -static void -nfs_proc_read_setup(struct nfs_read_data *data) +static void nfs_proc_read_setup(struct nfs_read_data *data) { - struct rpc_task *task = &data->task; - struct inode *inode = data->inode; - int flags; struct rpc_message msg = { .rpc_proc = &nfs_procedures[NFSPROC_READ], .rpc_argp = &data->args, @@ -583,34 +635,18 @@ nfs_proc_read_setup(struct nfs_read_data *data) .rpc_cred = data->cred, }; - /* N.B. Do we need to test? Never called for swapfile inode */ - flags = RPC_TASK_ASYNC | (IS_SWAPFILE(inode)? NFS_RPC_SWAPFLAGS : 0); - - /* Finalize the task. */ - rpc_init_task(task, NFS_CLIENT(inode), flags, &nfs_read_ops, data); - rpc_call_setup(task, &msg, 0); + rpc_call_setup(&data->task, &msg, 0); } -static void nfs_write_done(struct rpc_task *task, void *calldata) +static int nfs_write_done(struct rpc_task *task, struct nfs_write_data *data) { - struct nfs_write_data *data = calldata; - if (task->tk_status >= 0) nfs_post_op_update_inode(data->inode, data->res.fattr); - nfs_writeback_done(task, calldata); + return 0; } -static const struct rpc_call_ops nfs_write_ops = { - .rpc_call_done = nfs_write_done, - .rpc_release = nfs_writedata_release, -}; - -static void -nfs_proc_write_setup(struct nfs_write_data *data, int how) +static void nfs_proc_write_setup(struct nfs_write_data *data, int how) { - struct rpc_task *task = &data->task; - struct inode *inode = data->inode; - int flags; struct rpc_message msg = { .rpc_proc = &nfs_procedures[NFSPROC_WRITE], .rpc_argp = &data->args, @@ -621,12 +657,8 @@ nfs_proc_write_setup(struct nfs_write_data *data, int how) /* Note: NFSv2 ignores @stable and always uses NFS_FILE_SYNC */ data->args.stable = NFS_FILE_SYNC; - /* Set the initial flags for the task. */ - flags = (how & FLUSH_SYNC) ? 0 : RPC_TASK_ASYNC; - /* Finalize the task. */ - rpc_init_task(task, NFS_CLIENT(inode), flags, &nfs_write_ops, data); - rpc_call_setup(task, &msg, 0); + rpc_call_setup(&data->task, &msg, 0); } static void @@ -672,7 +704,9 @@ struct nfs_rpc_ops nfs_v2_clientops = { .pathconf = nfs_proc_pathconf, .decode_dirent = nfs_decode_dirent, .read_setup = nfs_proc_read_setup, + .read_done = nfs_read_done, .write_setup = nfs_proc_write_setup, + .write_done = nfs_write_done, .commit_setup = nfs_proc_commit_setup, .file_open = nfs_open, .file_release = nfs_release, diff --git a/fs/nfs/read.c b/fs/nfs/read.c index 05eb43f..3961524 100644 --- a/fs/nfs/read.c +++ b/fs/nfs/read.c @@ -31,17 +31,49 @@ #include <asm/system.h> +#include "iostat.h" + #define NFSDBG_FACILITY NFSDBG_PAGECACHE static int nfs_pagein_one(struct list_head *, struct inode *); -static void nfs_readpage_result_partial(struct nfs_read_data *, int); -static void nfs_readpage_result_full(struct nfs_read_data *, int); +static const struct rpc_call_ops nfs_read_partial_ops; +static const struct rpc_call_ops nfs_read_full_ops; static kmem_cache_t *nfs_rdata_cachep; -mempool_t *nfs_rdata_mempool; +static mempool_t *nfs_rdata_mempool; #define MIN_POOL_READ (32) +struct nfs_read_data *nfs_readdata_alloc(unsigned int pagecount) +{ + struct nfs_read_data *p = mempool_alloc(nfs_rdata_mempool, SLAB_NOFS); + + if (p) { + memset(p, 0, sizeof(*p)); + INIT_LIST_HEAD(&p->pages); + if (pagecount < NFS_PAGEVEC_SIZE) + p->pagevec = &p->page_array[0]; + else { + size_t size = ++pagecount * sizeof(struct page *); + p->pagevec = kmalloc(size, GFP_NOFS); + if (p->pagevec) { + memset(p->pagevec, 0, size); + } else { + mempool_free(p, nfs_rdata_mempool); + p = NULL; + } + } + } + return p; +} + +void nfs_readdata_free(struct nfs_read_data *p) +{ + if (p && (p->pagevec != &p->page_array[0])) + kfree(p->pagevec); + mempool_free(p, nfs_rdata_mempool); +} + void nfs_readdata_release(void *data) { nfs_readdata_free(data); @@ -133,6 +165,8 @@ static int nfs_readpage_sync(struct nfs_open_context *ctx, struct inode *inode, } count -= result; rdata->args.pgbase += result; + nfs_add_stats(inode, NFSIOS_SERVERREADBYTES, result); + /* Note: result == 0 should only happen if we're caching * a write that extends the file and punches a hole. */ @@ -196,9 +230,11 @@ static void nfs_readpage_release(struct nfs_page *req) * Set up the NFS read request struct */ static void nfs_read_rpcsetup(struct nfs_page *req, struct nfs_read_data *data, + const struct rpc_call_ops *call_ops, unsigned int count, unsigned int offset) { struct inode *inode; + int flags; data->req = req; data->inode = inode = req->wb_context->dentry->d_inode; @@ -216,6 +252,9 @@ static void nfs_read_rpcsetup(struct nfs_page *req, struct nfs_read_data *data, data->res.eof = 0; nfs_fattr_init(&data->fattr); + /* Set up the initial task struct. */ + flags = RPC_TASK_ASYNC | (IS_SWAPFILE(inode)? NFS_RPC_SWAPFLAGS : 0); + rpc_init_task(&data->task, NFS_CLIENT(inode), flags, call_ops, data); NFS_PROTO(inode)->read_setup(data); data->task.tk_cookie = (unsigned long)inode; @@ -303,14 +342,15 @@ static int nfs_pagein_multi(struct list_head *head, struct inode *inode) list_del_init(&data->pages); data->pagevec[0] = page; - data->complete = nfs_readpage_result_partial; if (nbytes > rsize) { - nfs_read_rpcsetup(req, data, rsize, offset); + nfs_read_rpcsetup(req, data, &nfs_read_partial_ops, + rsize, offset); offset += rsize; nbytes -= rsize; } else { - nfs_read_rpcsetup(req, data, nbytes, offset); + nfs_read_rpcsetup(req, data, &nfs_read_partial_ops, + nbytes, offset); nbytes = 0; } nfs_execute_read(data); @@ -356,8 +396,7 @@ static int nfs_pagein_one(struct list_head *head, struct inode *inode) } req = nfs_list_entry(data->pages.next); - data->complete = nfs_readpage_result_full; - nfs_read_rpcsetup(req, data, count, 0); + nfs_read_rpcsetup(req, data, &nfs_read_full_ops, count, 0); nfs_execute_read(data); return 0; @@ -391,12 +430,15 @@ nfs_pagein_list(struct list_head *head, int rpages) /* * Handle a read reply that fills part of a page. */ -static void nfs_readpage_result_partial(struct nfs_read_data *data, int status) +static void nfs_readpage_result_partial(struct rpc_task *task, void *calldata) { + struct nfs_read_data *data = calldata; struct nfs_page *req = data->req; struct page *page = req->wb_page; - if (status >= 0) { + if (nfs_readpage_result(task, data) != 0) + return; + if (task->tk_status >= 0) { unsigned int request = data->args.count; unsigned int result = data->res.count; @@ -415,20 +457,28 @@ static void nfs_readpage_result_partial(struct nfs_read_data *data, int status) } } +static const struct rpc_call_ops nfs_read_partial_ops = { + .rpc_call_done = nfs_readpage_result_partial, + .rpc_release = nfs_readdata_release, +}; + /* * This is the callback from RPC telling us whether a reply was * received or some error occurred (timeout or socket shutdown). */ -static void nfs_readpage_result_full(struct nfs_read_data *data, int status) +static void nfs_readpage_result_full(struct rpc_task *task, void *calldata) { + struct nfs_read_data *data = calldata; unsigned int count = data->res.count; + if (nfs_readpage_result(task, data) != 0) + return; while (!list_empty(&data->pages)) { struct nfs_page *req = nfs_list_entry(data->pages.next); struct page *page = req->wb_page; nfs_list_remove_request(req); - if (status >= 0) { + if (task->tk_status >= 0) { if (count < PAGE_CACHE_SIZE) { if (count < req->wb_bytes) memclear_highpage_flush(page, @@ -444,22 +494,33 @@ static void nfs_readpage_result_full(struct nfs_read_data *data, int status) } } +static const struct rpc_call_ops nfs_read_full_ops = { + .rpc_call_done = nfs_readpage_result_full, + .rpc_release = nfs_readdata_release, +}; + /* * This is the callback from RPC telling us whether a reply was * received or some error occurred (timeout or socket shutdown). */ -void nfs_readpage_result(struct rpc_task *task, void *calldata) +int nfs_readpage_result(struct rpc_task *task, struct nfs_read_data *data) { - struct nfs_read_data *data = calldata; struct nfs_readargs *argp = &data->args; struct nfs_readres *resp = &data->res; - int status = task->tk_status; + int status; dprintk("NFS: %4d nfs_readpage_result, (status %d)\n", - task->tk_pid, status); + task->tk_pid, task->tk_status); + + status = NFS_PROTO(data->inode)->read_done(task, data); + if (status != 0) + return status; + + nfs_add_stats(data->inode, NFSIOS_SERVERREADBYTES, resp->count); /* Is this a short read? */ if (task->tk_status >= 0 && resp->count < argp->count && !resp->eof) { + nfs_inc_stats(data->inode, NFSIOS_SHORTREAD); /* Has the server at least made some progress? */ if (resp->count != 0) { /* Yes, so retry the read at the end of the data */ @@ -467,14 +528,14 @@ void nfs_readpage_result(struct rpc_task *task, void *calldata) argp->pgbase += resp->count; argp->count -= resp->count; rpc_restart_call(task); - return; + return -EAGAIN; } task->tk_status = -EIO; } spin_lock(&data->inode->i_lock); NFS_I(data->inode)->cache_validity |= NFS_INO_INVALID_ATIME; spin_unlock(&data->inode->i_lock); - data->complete(data, status); + return 0; } /* @@ -491,6 +552,9 @@ int nfs_readpage(struct file *file, struct page *page) dprintk("NFS: nfs_readpage (%p %ld@%lu)\n", page, PAGE_CACHE_SIZE, page->index); + nfs_inc_stats(inode, NFSIOS_VFSREADPAGE); + nfs_add_stats(inode, NFSIOS_READPAGES, 1); + /* * Try to flush any pending writes to the file.. * @@ -570,6 +634,7 @@ int nfs_readpages(struct file *filp, struct address_space *mapping, inode->i_sb->s_id, (long long)NFS_FILEID(inode), nr_pages); + nfs_inc_stats(inode, NFSIOS_VFSREADPAGES); if (filp == NULL) { desc.ctx = nfs_find_open_context(inode, NULL, FMODE_READ); @@ -582,6 +647,7 @@ int nfs_readpages(struct file *filp, struct address_space *mapping, if (!list_empty(&head)) { int err = nfs_pagein_list(&head, server->rpages); if (!ret) + nfs_add_stats(inode, NFSIOS_READPAGES, err); ret = err; } put_nfs_open_context(desc.ctx); diff --git a/fs/nfs/unlink.c b/fs/nfs/unlink.c index a65c7b5..0e28189 100644 --- a/fs/nfs/unlink.c +++ b/fs/nfs/unlink.c @@ -163,10 +163,9 @@ nfs_async_unlink(struct dentry *dentry) struct rpc_clnt *clnt = NFS_CLIENT(dir->d_inode); int status = -ENOMEM; - data = kmalloc(sizeof(*data), GFP_KERNEL); + data = kzalloc(sizeof(*data), GFP_KERNEL); if (!data) goto out; - memset(data, 0, sizeof(*data)); data->cred = rpcauth_lookupcred(clnt->cl_auth, 0); if (IS_ERR(data->cred)) { diff --git a/fs/nfs/write.c b/fs/nfs/write.c index 9449b68..3f52254 100644 --- a/fs/nfs/write.c +++ b/fs/nfs/write.c @@ -63,6 +63,7 @@ #include <linux/smp_lock.h> #include "delegation.h" +#include "iostat.h" #define NFSDBG_FACILITY NFSDBG_PAGECACHE @@ -76,20 +77,21 @@ static struct nfs_page * nfs_update_request(struct nfs_open_context*, struct inode *, struct page *, unsigned int, unsigned int); -static void nfs_writeback_done_partial(struct nfs_write_data *, int); -static void nfs_writeback_done_full(struct nfs_write_data *, int); static int nfs_wait_on_write_congestion(struct address_space *, int); static int nfs_wait_on_requests(struct inode *, unsigned long, unsigned int); static int nfs_flush_inode(struct inode *inode, unsigned long idx_start, unsigned int npages, int how); +static const struct rpc_call_ops nfs_write_partial_ops; +static const struct rpc_call_ops nfs_write_full_ops; +static const struct rpc_call_ops nfs_commit_ops; static kmem_cache_t *nfs_wdata_cachep; -mempool_t *nfs_wdata_mempool; +static mempool_t *nfs_wdata_mempool; static mempool_t *nfs_commit_mempool; static DECLARE_WAIT_QUEUE_HEAD(nfs_write_congestion); -static inline struct nfs_write_data *nfs_commit_alloc(unsigned int pagecount) +struct nfs_write_data *nfs_commit_alloc(unsigned int pagecount) { struct nfs_write_data *p = mempool_alloc(nfs_commit_mempool, SLAB_NOFS); @@ -100,11 +102,39 @@ static inline struct nfs_write_data *nfs_commit_alloc(unsigned int pagecount) p->pagevec = &p->page_array[0]; else { size_t size = ++pagecount * sizeof(struct page *); + p->pagevec = kzalloc(size, GFP_NOFS); + if (!p->pagevec) { + mempool_free(p, nfs_commit_mempool); + p = NULL; + } + } + } + return p; +} + +void nfs_commit_free(struct nfs_write_data *p) +{ + if (p && (p->pagevec != &p->page_array[0])) + kfree(p->pagevec); + mempool_free(p, nfs_commit_mempool); +} + +struct nfs_write_data *nfs_writedata_alloc(unsigned int pagecount) +{ + struct nfs_write_data *p = mempool_alloc(nfs_wdata_mempool, SLAB_NOFS); + + if (p) { + memset(p, 0, sizeof(*p)); + INIT_LIST_HEAD(&p->pages); + if (pagecount < NFS_PAGEVEC_SIZE) + p->pagevec = &p->page_array[0]; + else { + size_t size = ++pagecount * sizeof(struct page *); p->pagevec = kmalloc(size, GFP_NOFS); if (p->pagevec) { memset(p->pagevec, 0, size); } else { - mempool_free(p, nfs_commit_mempool); + mempool_free(p, nfs_wdata_mempool); p = NULL; } } @@ -112,11 +142,11 @@ static inline struct nfs_write_data *nfs_commit_alloc(unsigned int pagecount) return p; } -static inline void nfs_commit_free(struct nfs_write_data *p) +void nfs_writedata_free(struct nfs_write_data *p) { if (p && (p->pagevec != &p->page_array[0])) kfree(p->pagevec); - mempool_free(p, nfs_commit_mempool); + mempool_free(p, nfs_wdata_mempool); } void nfs_writedata_release(void *wdata) @@ -136,6 +166,7 @@ static void nfs_grow_file(struct page *page, unsigned int offset, unsigned int c end = ((loff_t)page->index << PAGE_CACHE_SHIFT) + ((loff_t)offset+count); if (i_size >= end) return; + nfs_inc_stats(inode, NFSIOS_EXTENDWRITE); i_size_write(inode, end); } @@ -225,6 +256,7 @@ static int nfs_writepage_sync(struct nfs_open_context *ctx, struct inode *inode, wdata->args.pgbase += result; written += result; count -= result; + nfs_add_stats(inode, NFSIOS_SERVERWRITTENBYTES, result); } while (count); /* Update file length */ nfs_grow_file(page, offset, written); @@ -281,6 +313,9 @@ int nfs_writepage(struct page *page, struct writeback_control *wbc) int priority = wb_priority(wbc); int err; + nfs_inc_stats(inode, NFSIOS_VFSWRITEPAGE); + nfs_add_stats(inode, NFSIOS_WRITEPAGES, 1); + /* * Note: We need to ensure that we have a reference to the inode * if we are to do asynchronous writes. If not, waiting @@ -345,6 +380,8 @@ int nfs_writepages(struct address_space *mapping, struct writeback_control *wbc) struct inode *inode = mapping->host; int err; + nfs_inc_stats(inode, NFSIOS_VFSWRITEPAGES); + err = generic_writepages(mapping, wbc); if (err) return err; @@ -356,6 +393,7 @@ int nfs_writepages(struct address_space *mapping, struct writeback_control *wbc) err = nfs_flush_inode(inode, 0, 0, wb_priority(wbc)); if (err < 0) goto out; + nfs_add_stats(inode, NFSIOS_WRITEPAGES, err); wbc->nr_to_write -= err; if (!wbc->nonblocking && wbc->sync_mode == WB_SYNC_ALL) { err = nfs_wait_on_requests(inode, 0, 0); @@ -391,6 +429,7 @@ static int nfs_inode_add_request(struct inode *inode, struct nfs_page *req) if (nfs_have_delegation(inode, FMODE_WRITE)) nfsi->change_attr++; } + SetPagePrivate(req->wb_page); nfsi->npages++; atomic_inc(&req->wb_count); return 0; @@ -407,6 +446,7 @@ static void nfs_inode_remove_request(struct nfs_page *req) BUG_ON (!NFS_WBACK_BUSY(req)); spin_lock(&nfsi->req_lock); + ClearPagePrivate(req->wb_page); radix_tree_delete(&nfsi->nfs_page_tree, req->wb_index); nfsi->npages--; if (!nfsi->npages) { @@ -499,8 +539,7 @@ nfs_mark_request_commit(struct nfs_page *req) * * Interruptible by signals only if mounted with intr flag. */ -static int -nfs_wait_on_requests(struct inode *inode, unsigned long idx_start, unsigned int npages) +static int nfs_wait_on_requests_locked(struct inode *inode, unsigned long idx_start, unsigned int npages) { struct nfs_inode *nfsi = NFS_I(inode); struct nfs_page *req; @@ -513,7 +552,6 @@ nfs_wait_on_requests(struct inode *inode, unsigned long idx_start, unsigned int else idx_end = idx_start + npages - 1; - spin_lock(&nfsi->req_lock); next = idx_start; while (radix_tree_gang_lookup_tag(&nfsi->nfs_page_tree, (void **)&req, next, 1, NFS_PAGE_TAG_WRITEBACK)) { if (req->wb_index > idx_end) @@ -526,15 +564,25 @@ nfs_wait_on_requests(struct inode *inode, unsigned long idx_start, unsigned int spin_unlock(&nfsi->req_lock); error = nfs_wait_on_request(req); nfs_release_request(req); + spin_lock(&nfsi->req_lock); if (error < 0) return error; - spin_lock(&nfsi->req_lock); res++; } - spin_unlock(&nfsi->req_lock); return res; } +static int nfs_wait_on_requests(struct inode *inode, unsigned long idx_start, unsigned int npages) +{ + struct nfs_inode *nfsi = NFS_I(inode); + int ret; + + spin_lock(&nfsi->req_lock); + ret = nfs_wait_on_requests_locked(inode, idx_start, npages); + spin_unlock(&nfsi->req_lock); + return ret; +} + /* * nfs_scan_dirty - Scan an inode for dirty requests * @inode: NFS inode to scan @@ -586,6 +634,11 @@ nfs_scan_commit(struct inode *inode, struct list_head *dst, unsigned long idx_st } return res; } +#else +static inline int nfs_scan_commit(struct inode *inode, struct list_head *dst, unsigned long idx_start, unsigned int npages) +{ + return 0; +} #endif static int nfs_wait_on_write_congestion(struct address_space *mapping, int intr) @@ -598,6 +651,9 @@ static int nfs_wait_on_write_congestion(struct address_space *mapping, int intr) if (!bdi_write_congested(bdi)) return 0; + + nfs_inc_stats(mapping->host, NFSIOS_CONGESTIONWAIT); + if (intr) { struct rpc_clnt *clnt = NFS_CLIENT(mapping->host); sigset_t oldset; @@ -653,8 +709,11 @@ static struct nfs_page * nfs_update_request(struct nfs_open_context* ctx, spin_unlock(&nfsi->req_lock); error = nfs_wait_on_request(req); nfs_release_request(req); - if (error < 0) + if (error < 0) { + if (new) + nfs_release_request(new); return ERR_PTR(error); + } continue; } spin_unlock(&nfsi->req_lock); @@ -748,6 +807,8 @@ int nfs_updatepage(struct file *file, struct page *page, struct nfs_page *req; int status = 0; + nfs_inc_stats(inode, NFSIOS_VFSUPDATEPAGE); + dprintk("NFS: nfs_updatepage(%s/%s %d@%Ld)\n", file->f_dentry->d_parent->d_name.name, file->f_dentry->d_name.name, count, @@ -857,10 +918,12 @@ static inline int flush_task_priority(int how) */ static void nfs_write_rpcsetup(struct nfs_page *req, struct nfs_write_data *data, + const struct rpc_call_ops *call_ops, unsigned int count, unsigned int offset, int how) { struct inode *inode; + int flags; /* Set up the RPC argument and reply structs * NB: take care not to mess about with data->commit et al. */ @@ -881,6 +944,9 @@ static void nfs_write_rpcsetup(struct nfs_page *req, data->res.verf = &data->verf; nfs_fattr_init(&data->fattr); + /* Set up the initial task struct. */ + flags = (how & FLUSH_SYNC) ? 0 : RPC_TASK_ASYNC; + rpc_init_task(&data->task, NFS_CLIENT(inode), flags, call_ops, data); NFS_PROTO(inode)->write_setup(data, how); data->task.tk_priority = flush_task_priority(how); @@ -910,7 +976,7 @@ static void nfs_execute_write(struct nfs_write_data *data) * Generate multiple small requests to write out a single * contiguous dirty area on one page. */ -static int nfs_flush_multi(struct list_head *head, struct inode *inode, int how) +static int nfs_flush_multi(struct inode *inode, struct list_head *head, int how) { struct nfs_page *req = nfs_list_entry(head->next); struct page *page = req->wb_page; @@ -944,14 +1010,15 @@ static int nfs_flush_multi(struct list_head *head, struct inode *inode, int how) list_del_init(&data->pages); data->pagevec[0] = page; - data->complete = nfs_writeback_done_partial; if (nbytes > wsize) { - nfs_write_rpcsetup(req, data, wsize, offset, how); + nfs_write_rpcsetup(req, data, &nfs_write_partial_ops, + wsize, offset, how); offset += wsize; nbytes -= wsize; } else { - nfs_write_rpcsetup(req, data, nbytes, offset, how); + nfs_write_rpcsetup(req, data, &nfs_write_partial_ops, + nbytes, offset, how); nbytes = 0; } nfs_execute_write(data); @@ -978,16 +1045,13 @@ out_bad: * This is the case if nfs_updatepage detects a conflicting request * that has been written but not committed. */ -static int nfs_flush_one(struct list_head *head, struct inode *inode, int how) +static int nfs_flush_one(struct inode *inode, struct list_head *head, int how) { struct nfs_page *req; struct page **pages; struct nfs_write_data *data; unsigned int count; - if (NFS_SERVER(inode)->wsize < PAGE_CACHE_SIZE) - return nfs_flush_multi(head, inode, how); - data = nfs_writedata_alloc(NFS_SERVER(inode)->wpages); if (!data) goto out_bad; @@ -1005,9 +1069,8 @@ static int nfs_flush_one(struct list_head *head, struct inode *inode, int how) } req = nfs_list_entry(data->pages.next); - data->complete = nfs_writeback_done_full; /* Set up the argument struct */ - nfs_write_rpcsetup(req, data, count, 0, how); + nfs_write_rpcsetup(req, data, &nfs_write_full_ops, count, 0, how); nfs_execute_write(data); return 0; @@ -1021,24 +1084,32 @@ static int nfs_flush_one(struct list_head *head, struct inode *inode, int how) return -ENOMEM; } -static int -nfs_flush_list(struct list_head *head, int wpages, int how) +static int nfs_flush_list(struct inode *inode, struct list_head *head, int npages, int how) { LIST_HEAD(one_request); - struct nfs_page *req; - int error = 0; - unsigned int pages = 0; + int (*flush_one)(struct inode *, struct list_head *, int); + struct nfs_page *req; + int wpages = NFS_SERVER(inode)->wpages; + int wsize = NFS_SERVER(inode)->wsize; + int error; - while (!list_empty(head)) { - pages += nfs_coalesce_requests(head, &one_request, wpages); + flush_one = nfs_flush_one; + if (wsize < PAGE_CACHE_SIZE) + flush_one = nfs_flush_multi; + /* For single writes, FLUSH_STABLE is more efficient */ + if (npages <= wpages && npages == NFS_I(inode)->npages + && nfs_list_entry(head->next)->wb_bytes <= wsize) + how |= FLUSH_STABLE; + + do { + nfs_coalesce_requests(head, &one_request, wpages); req = nfs_list_entry(one_request.next); - error = nfs_flush_one(&one_request, req->wb_context->dentry->d_inode, how); + error = flush_one(inode, &one_request, how); if (error < 0) - break; - } - if (error >= 0) - return pages; - + goto out_err; + } while (!list_empty(head)); + return 0; +out_err: while (!list_empty(head)) { req = nfs_list_entry(head->next); nfs_list_remove_request(req); @@ -1051,8 +1122,9 @@ nfs_flush_list(struct list_head *head, int wpages, int how) /* * Handle a write reply that flushed part of a page. */ -static void nfs_writeback_done_partial(struct nfs_write_data *data, int status) +static void nfs_writeback_done_partial(struct rpc_task *task, void *calldata) { + struct nfs_write_data *data = calldata; struct nfs_page *req = data->req; struct page *page = req->wb_page; @@ -1062,11 +1134,14 @@ static void nfs_writeback_done_partial(struct nfs_write_data *data, int status) req->wb_bytes, (long long)req_offset(req)); - if (status < 0) { + if (nfs_writeback_done(task, data) != 0) + return; + + if (task->tk_status < 0) { ClearPageUptodate(page); SetPageError(page); - req->wb_context->error = status; - dprintk(", error = %d\n", status); + req->wb_context->error = task->tk_status; + dprintk(", error = %d\n", task->tk_status); } else { #if defined(CONFIG_NFS_V3) || defined(CONFIG_NFS_V4) if (data->verf.committed < NFS_FILE_SYNC) { @@ -1087,6 +1162,11 @@ static void nfs_writeback_done_partial(struct nfs_write_data *data, int status) nfs_writepage_release(req); } +static const struct rpc_call_ops nfs_write_partial_ops = { + .rpc_call_done = nfs_writeback_done_partial, + .rpc_release = nfs_writedata_release, +}; + /* * Handle a write reply that flushes a whole page. * @@ -1094,11 +1174,15 @@ static void nfs_writeback_done_partial(struct nfs_write_data *data, int status) * writebacks since the page->count is kept > 1 for as long * as the page has a write request pending. */ -static void nfs_writeback_done_full(struct nfs_write_data *data, int status) +static void nfs_writeback_done_full(struct rpc_task *task, void *calldata) { + struct nfs_write_data *data = calldata; struct nfs_page *req; struct page *page; + if (nfs_writeback_done(task, data) != 0) + return; + /* Update attributes as result of writeback. */ while (!list_empty(&data->pages)) { req = nfs_list_entry(data->pages.next); @@ -1111,13 +1195,13 @@ static void nfs_writeback_done_full(struct nfs_write_data *data, int status) req->wb_bytes, (long long)req_offset(req)); - if (status < 0) { + if (task->tk_status < 0) { ClearPageUptodate(page); SetPageError(page); - req->wb_context->error = status; + req->wb_context->error = task->tk_status; end_page_writeback(page); nfs_inode_remove_request(req); - dprintk(", error = %d\n", status); + dprintk(", error = %d\n", task->tk_status); goto next; } end_page_writeback(page); @@ -1139,18 +1223,30 @@ static void nfs_writeback_done_full(struct nfs_write_data *data, int status) } } +static const struct rpc_call_ops nfs_write_full_ops = { + .rpc_call_done = nfs_writeback_done_full, + .rpc_release = nfs_writedata_release, +}; + + /* * This function is called when the WRITE call is complete. */ -void nfs_writeback_done(struct rpc_task *task, void *calldata) +int nfs_writeback_done(struct rpc_task *task, struct nfs_write_data *data) { - struct nfs_write_data *data = calldata; struct nfs_writeargs *argp = &data->args; struct nfs_writeres *resp = &data->res; + int status; dprintk("NFS: %4d nfs_writeback_done (status %d)\n", task->tk_pid, task->tk_status); + /* Call the NFS version-specific code */ + status = NFS_PROTO(data->inode)->write_done(task, data); + if (status != 0) + return status; + nfs_add_stats(data->inode, NFSIOS_SERVERWRITTENBYTES, resp->count); + #if defined(CONFIG_NFS_V3) || defined(CONFIG_NFS_V4) if (resp->verf->committed < argp->stable && task->tk_status >= 0) { /* We tried a write call, but the server did not @@ -1176,6 +1272,8 @@ void nfs_writeback_done(struct rpc_task *task, void *calldata) if (task->tk_status >= 0 && resp->count < argp->count) { static unsigned long complain; + nfs_inc_stats(data->inode, NFSIOS_SHORTWRITE); + /* Has the server at least made some progress? */ if (resp->count != 0) { /* Was this an NFSv2 write or an NFSv3 stable write? */ @@ -1191,7 +1289,7 @@ void nfs_writeback_done(struct rpc_task *task, void *calldata) argp->stable = NFS_FILE_SYNC; } rpc_restart_call(task); - return; + return -EAGAIN; } if (time_before(complain, jiffies)) { printk(KERN_WARNING @@ -1202,11 +1300,7 @@ void nfs_writeback_done(struct rpc_task *task, void *calldata) /* Can't do anything about it except throw an error. */ task->tk_status = -EIO; } - - /* - * Process the nfs_page list - */ - data->complete(data, task->tk_status); + return 0; } @@ -1220,10 +1314,12 @@ void nfs_commit_release(void *wdata) * Set up the argument/result storage required for the RPC call. */ static void nfs_commit_rpcsetup(struct list_head *head, - struct nfs_write_data *data, int how) + struct nfs_write_data *data, + int how) { struct nfs_page *first; struct inode *inode; + int flags; /* Set up the RPC argument and reply structs * NB: take care not to mess about with data->commit et al. */ @@ -1243,7 +1339,10 @@ static void nfs_commit_rpcsetup(struct list_head *head, data->res.fattr = &data->fattr; data->res.verf = &data->verf; nfs_fattr_init(&data->fattr); - + + /* Set up the initial task struct. */ + flags = (how & FLUSH_SYNC) ? 0 : RPC_TASK_ASYNC; + rpc_init_task(&data->task, NFS_CLIENT(inode), flags, &nfs_commit_ops, data); NFS_PROTO(inode)->commit_setup(data, how); data->task.tk_priority = flush_task_priority(how); @@ -1284,7 +1383,7 @@ nfs_commit_list(struct inode *inode, struct list_head *head, int how) /* * COMMIT call returned */ -void nfs_commit_done(struct rpc_task *task, void *calldata) +static void nfs_commit_done(struct rpc_task *task, void *calldata) { struct nfs_write_data *data = calldata; struct nfs_page *req; @@ -1293,6 +1392,10 @@ void nfs_commit_done(struct rpc_task *task, void *calldata) dprintk("NFS: %4d nfs_commit_done (status %d)\n", task->tk_pid, task->tk_status); + /* Call the NFS version-specific code */ + if (NFS_PROTO(data->inode)->commit_done(task, data) != 0) + return; + while (!list_empty(&data->pages)) { req = nfs_list_entry(data->pages.next); nfs_list_remove_request(req); @@ -1326,6 +1429,16 @@ void nfs_commit_done(struct rpc_task *task, void *calldata) } sub_page_state(nr_unstable,res); } + +static const struct rpc_call_ops nfs_commit_ops = { + .rpc_call_done = nfs_commit_done, + .rpc_release = nfs_commit_release, +}; +#else +static inline int nfs_commit_list(struct inode *inode, struct list_head *head, int how) +{ + return 0; +} #endif static int nfs_flush_inode(struct inode *inode, unsigned long idx_start, @@ -1333,24 +1446,16 @@ static int nfs_flush_inode(struct inode *inode, unsigned long idx_start, { struct nfs_inode *nfsi = NFS_I(inode); LIST_HEAD(head); - int res, - error = 0; + int res; spin_lock(&nfsi->req_lock); res = nfs_scan_dirty(inode, &head, idx_start, npages); spin_unlock(&nfsi->req_lock); if (res) { - struct nfs_server *server = NFS_SERVER(inode); - - /* For single writes, FLUSH_STABLE is more efficient */ - if (res == nfsi->npages && nfsi->npages <= server->wpages) { - if (res > 1 || nfs_list_entry(head.next)->wb_bytes <= server->wsize) - how |= FLUSH_STABLE; - } - error = nfs_flush_list(&head, server->wpages, how); + int error = nfs_flush_list(inode, &head, res, how); + if (error < 0) + return error; } - if (error < 0) - return error; return res; } @@ -1359,14 +1464,13 @@ int nfs_commit_inode(struct inode *inode, int how) { struct nfs_inode *nfsi = NFS_I(inode); LIST_HEAD(head); - int res, - error = 0; + int res; spin_lock(&nfsi->req_lock); res = nfs_scan_commit(inode, &head, 0, 0); spin_unlock(&nfsi->req_lock); if (res) { - error = nfs_commit_list(inode, &head, how); + int error = nfs_commit_list(inode, &head, how); if (error < 0) return error; } @@ -1374,28 +1478,38 @@ int nfs_commit_inode(struct inode *inode, int how) } #endif -int nfs_sync_inode(struct inode *inode, unsigned long idx_start, - unsigned int npages, int how) +int nfs_sync_inode_wait(struct inode *inode, unsigned long idx_start, + unsigned int npages, int how) { + struct nfs_inode *nfsi = NFS_I(inode); + LIST_HEAD(head); int nocommit = how & FLUSH_NOCOMMIT; - int wait = how & FLUSH_WAIT; - int error; - - how &= ~(FLUSH_WAIT|FLUSH_NOCOMMIT); + int pages, ret; + how &= ~FLUSH_NOCOMMIT; + spin_lock(&nfsi->req_lock); do { - if (wait) { - error = nfs_wait_on_requests(inode, idx_start, npages); - if (error != 0) - continue; - } - error = nfs_flush_inode(inode, idx_start, npages, how); - if (error != 0) + ret = nfs_wait_on_requests_locked(inode, idx_start, npages); + if (ret != 0) continue; - if (!nocommit) - error = nfs_commit_inode(inode, how); - } while (error > 0); - return error; + pages = nfs_scan_dirty(inode, &head, idx_start, npages); + if (pages != 0) { + spin_unlock(&nfsi->req_lock); + ret = nfs_flush_list(inode, &head, pages, how); + spin_lock(&nfsi->req_lock); + continue; + } + if (nocommit) + break; + pages = nfs_scan_commit(inode, &head, 0, 0); + if (pages == 0) + break; + spin_unlock(&nfsi->req_lock); + ret = nfs_commit_list(inode, &head, how); + spin_lock(&nfsi->req_lock); + } while (ret >= 0); + spin_unlock(&nfsi->req_lock); + return ret; } int nfs_init_writepagecache(void) diff --git a/fs/nfsd/nfs4callback.c b/fs/nfsd/nfs4callback.c index 8d3d23c..c872bd0 100644 --- a/fs/nfsd/nfs4callback.c +++ b/fs/nfsd/nfs4callback.c @@ -326,6 +326,8 @@ out: .p_encode = (kxdrproc_t) nfs4_xdr_##argtype, \ .p_decode = (kxdrproc_t) nfs4_xdr_##restype, \ .p_bufsiz = MAX(NFS4_##argtype##_sz,NFS4_##restype##_sz) << 2, \ + .p_statidx = NFSPROC4_CB_##call, \ + .p_name = #proc, \ } static struct rpc_procinfo nfs4_cb_procedures[] = { diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 1143cfb..f6ab762 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -2639,7 +2639,7 @@ nfsd4_lock(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_lock struct nfs4_stateid *lock_stp; struct file *filp; struct file_lock file_lock; - struct file_lock *conflock; + struct file_lock conflock; int status = 0; unsigned int strhashval; @@ -2775,11 +2775,11 @@ conflicting_lock: /* XXX There is a race here. Future patch needed to provide * an atomic posix_lock_and_test_file */ - if (!(conflock = posix_test_lock(filp, &file_lock))) { + if (!posix_test_lock(filp, &file_lock, &conflock)) { status = nfserr_serverfault; goto out; } - nfs4_set_lock_denied(conflock, &lock->lk_denied); + nfs4_set_lock_denied(&conflock, &lock->lk_denied); out: if (status && lock->lk_is_new && lock_sop) release_stateowner(lock_sop); @@ -2800,7 +2800,7 @@ nfsd4_lockt(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_lock struct inode *inode; struct file file; struct file_lock file_lock; - struct file_lock *conflicting_lock; + struct file_lock conflock; int status; if (nfs4_in_grace()) @@ -2864,10 +2864,9 @@ nfsd4_lockt(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_lock file.f_dentry = current_fh->fh_dentry; status = nfs_ok; - conflicting_lock = posix_test_lock(&file, &file_lock); - if (conflicting_lock) { + if (posix_test_lock(&file, &file_lock, &conflock)) { status = nfserr_denied; - nfs4_set_lock_denied(conflicting_lock, &lockt->lt_denied); + nfs4_set_lock_denied(&conflock, &lockt->lt_denied); } out: nfs4_unlock_state(); diff --git a/fs/proc/base.c b/fs/proc/base.c index 20feb75..8f1f49c 100644 --- a/fs/proc/base.c +++ b/fs/proc/base.c @@ -104,6 +104,7 @@ enum pid_directory_inos { PROC_TGID_MAPS, PROC_TGID_NUMA_MAPS, PROC_TGID_MOUNTS, + PROC_TGID_MOUNTSTATS, PROC_TGID_WCHAN, #ifdef CONFIG_MMU PROC_TGID_SMAPS, @@ -144,6 +145,7 @@ enum pid_directory_inos { PROC_TID_MAPS, PROC_TID_NUMA_MAPS, PROC_TID_MOUNTS, + PROC_TID_MOUNTSTATS, PROC_TID_WCHAN, #ifdef CONFIG_MMU PROC_TID_SMAPS, @@ -201,6 +203,7 @@ static struct pid_entry tgid_base_stuff[] = { E(PROC_TGID_ROOT, "root", S_IFLNK|S_IRWXUGO), E(PROC_TGID_EXE, "exe", S_IFLNK|S_IRWXUGO), E(PROC_TGID_MOUNTS, "mounts", S_IFREG|S_IRUGO), + E(PROC_TGID_MOUNTSTATS, "mountstats", S_IFREG|S_IRUSR), #ifdef CONFIG_MMU E(PROC_TGID_SMAPS, "smaps", S_IFREG|S_IRUGO), #endif @@ -732,6 +735,38 @@ static struct file_operations proc_mounts_operations = { .poll = mounts_poll, }; +extern struct seq_operations mountstats_op; +static int mountstats_open(struct inode *inode, struct file *file) +{ + struct task_struct *task = proc_task(inode); + int ret = seq_open(file, &mountstats_op); + + if (!ret) { + struct seq_file *m = file->private_data; + struct namespace *namespace; + task_lock(task); + namespace = task->namespace; + if (namespace) + get_namespace(namespace); + task_unlock(task); + + if (namespace) + m->private = namespace; + else { + seq_release(inode, file); + ret = -EINVAL; + } + } + return ret; +} + +static struct file_operations proc_mountstats_operations = { + .open = mountstats_open, + .read = seq_read, + .llseek = seq_lseek, + .release = mounts_release, +}; + #define PROC_BLOCK_SIZE (3*1024) /* 4K page size but our output routines use some slack for overruns */ static ssize_t proc_info_read(struct file * file, char __user * buf, @@ -1730,6 +1765,10 @@ static struct dentry *proc_pident_lookup(struct inode *dir, inode->i_fop = &proc_smaps_operations; break; #endif + case PROC_TID_MOUNTSTATS: + case PROC_TGID_MOUNTSTATS: + inode->i_fop = &proc_mountstats_operations; + break; #ifdef CONFIG_SECURITY case PROC_TID_ATTR: inode->i_nlink = 2; |
