Merge branch 'devel-for-2.6.31' into for-2.6.31

Conflicts:
	fs/nfs/client.c
	fs/nfs/super.c

fs/lockd/clntproc.c

@@ -126,7 +126,6 @@ static void nlmclnt_setlockargs(struct nlm_rqst *req, struct file_lock *fl)
 	struct nlm_lock	*lock = &argp->lock;
 
 	nlmclnt_next_cookie(&argp->cookie);
-	argp->state   = nsm_local_state;
 	memcpy(&lock->fh, NFS_FH(fl->fl_file->f_path.dentry->d_inode), sizeof(struct nfs_fh));
 	lock->caller  = utsname()->nodename;
 	lock->oh.data = req->a_owner;
@@ -165,6 +164,7 @@ int nlmclnt_proc(struct nlm_host *host, int cmd, struct file_lock *fl)
 	/* Set up the argument struct */
 	nlmclnt_setlockargs(call, fl);
 
+	lock_kernel();
 	if (IS_SETLK(cmd) || IS_SETLKW(cmd)) {
 		if (fl->fl_type != F_UNLCK) {
 			call->a_args.block = IS_SETLKW(cmd) ? 1 : 0;
@@ -178,6 +178,7 @@ int nlmclnt_proc(struct nlm_host *host, int cmd, struct file_lock *fl)
 
 	fl->fl_ops->fl_release_private(fl);
 	fl->fl_ops = NULL;
+	unlock_kernel();
 
 	dprintk("lockd: clnt proc returns %d\n", status);
 	return status;
@@ -519,6 +520,7 @@ nlmclnt_lock(struct nlm_rqst *req, struct file_lock *fl)
 
 	if (nsm_monitor(host) < 0)
 		goto out;
+	req->a_args.state = nsm_local_state;
 
 	fl->fl_flags |= FL_ACCESS;
 	status = do_vfs_lock(fl);

fs/lockd/mon.c

@@ -53,7 +53,7 @@ static				DEFINE_SPINLOCK(nsm_lock);
 /*
  * Local NSM state
  */
-int	__read_mostly		nsm_local_state;
+u32	__read_mostly		nsm_local_state;
 int	__read_mostly		nsm_use_hostnames;
 
 static inline struct sockaddr *nsm_addr(const struct nsm_handle *nsm)
@@ -112,6 +112,7 @@ static struct rpc_clnt *nsm_create(void)
 		.program		= &nsm_program,
 		.version		= NSM_VERSION,
 		.authflavor		= RPC_AUTH_NULL,
+		.flags			= RPC_CLNT_CREATE_NOPING,
 	};
 
 	return rpc_create(&args);
@@ -184,13 +185,19 @@ int nsm_monitor(const struct nlm_host *host)
 	nsm->sm_mon_name = nsm_use_hostnames ? nsm->sm_name : nsm->sm_addrbuf;
 
 	status = nsm_mon_unmon(nsm, NSMPROC_MON, &res);
-	if (res.status != 0)
+	if (unlikely(res.status != 0))
 		status = -EIO;
-	if (status < 0)
+	if (unlikely(status < 0)) {
 		printk(KERN_NOTICE "lockd: cannot monitor %s\n", nsm->sm_name);
-	else
-		nsm->sm_monitored = 1;
 		return status;
+	}
+
+	nsm->sm_monitored = 1;
+	if (unlikely(nsm_local_state != res.state)) {
+		nsm_local_state = res.state;
+		dprintk("lockd: NSM state changed to %d\n", nsm_local_state);
+	}
+	return 0;
 }
 
 /**

fs/nfs/callback.c

@@ -123,7 +123,9 @@ nfs4_callback_up(struct svc_serv *serv)
 		nfs_callback_tcpport6 = ret;
 		dprintk("NFS: Callback listener port = %u (af %u)\n",
 				nfs_callback_tcpport6, PF_INET6);
-	} else if (ret != -EAFNOSUPPORT)
+	} else if (ret == -EAFNOSUPPORT)
+		ret = 0;
+	else
 		goto out_err;
 #endif	/* defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) */
 

fs/nfs/client.c

@@ -116,6 +116,7 @@ static struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *cl_
 {
 	struct nfs_client *clp;
 	struct rpc_cred *cred;
+	int err = -ENOMEM;
 
 	if ((clp = kzalloc(sizeof(*clp), GFP_KERNEL)) == NULL)
 		goto error_0;
@@ -129,6 +130,7 @@ static struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *cl_
 	clp->cl_addrlen = cl_init->addrlen;
 
 	if (cl_init->hostname) {
+		err = -ENOMEM;
 		clp->cl_hostname = kstrdup(cl_init->hostname, GFP_KERNEL);
 		if (!clp->cl_hostname)
 			goto error_cleanup;
@@ -159,7 +161,7 @@ static struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *cl_
 error_cleanup:
 	kfree(clp);
 error_0:
-	return NULL;
+	return ERR_PTR(err);
 }
 
 static void nfs4_shutdown_client(struct nfs_client *clp)
@@ -480,9 +482,10 @@ static struct nfs_client *nfs_get_client(const struct nfs_client_initdata *cl_in
 		spin_unlock(&nfs_client_lock);
 
 		new = nfs_alloc_client(cl_init);
-	} while (new);
+	} while (!IS_ERR(new));
 
-	return ERR_PTR(-ENOMEM);
+	dprintk("--> nfs_get_client() = %ld [failed]\n", PTR_ERR(new));
+	return new;
 
 	/* install a new client and return with it unready */
 install_client:

fs/nfs/delegation.c

@@ -68,29 +68,26 @@ static int nfs_delegation_claim_locks(struct nfs_open_context *ctx, struct nfs4_
 {
 	struct inode *inode = state->inode;
 	struct file_lock *fl;
-	int status;
+	int status = 0;
+
+	if (inode->i_flock == NULL)
+		goto out;
 
+	/* Protect inode->i_flock using the BKL */
+	lock_kernel();
 	for (fl = inode->i_flock; fl != NULL; fl = fl->fl_next) {
 		if (!(fl->fl_flags & (FL_POSIX|FL_FLOCK)))
 			continue;
 		if (nfs_file_open_context(fl->fl_file) != ctx)
 			continue;
+		unlock_kernel();
 		status = nfs4_lock_delegation_recall(state, fl);
-		if (status >= 0)
-			continue;
-		switch (status) {
-			default:
-				printk(KERN_ERR "%s: unhandled error %d.\n",
-						__func__, status);
-			case -NFS4ERR_EXPIRED:
-				/* kill_proc(fl->fl_pid, SIGLOST, 1); */
-			case -NFS4ERR_STALE_CLIENTID:
-				nfs4_schedule_state_recovery(NFS_SERVER(inode)->nfs_client);
-				goto out_err;
-		}
+		if (status < 0)
+			goto out;
+		lock_kernel();
 	}
-	return 0;
-out_err:
+	unlock_kernel();
+out:
 	return status;
 }
 
@@ -268,7 +265,10 @@ static int __nfs_inode_return_delegation(struct inode *inode, struct nfs_delegat
 	struct nfs_inode *nfsi = NFS_I(inode);
 
 	nfs_msync_inode(inode);
-	/* Guard against new delegated open calls */
+	/*
+	 * Guard against new delegated open/lock/unlock calls and against
+	 * state recovery
+	 */
 	down_write(&nfsi->rwsem);
 	nfs_delegation_claim_opens(inode, &delegation->stateid);
 	up_write(&nfsi->rwsem);

fs/nfs/file.c

@@ -48,6 +48,9 @@ static ssize_t nfs_file_splice_read(struct file *filp, loff_t *ppos,
 					size_t count, unsigned int flags);
 static ssize_t nfs_file_read(struct kiocb *, const struct iovec *iov,
 				unsigned long nr_segs, loff_t pos);
+static ssize_t nfs_file_splice_write(struct pipe_inode_info *pipe,
+					struct file *filp, loff_t *ppos,
+					size_t count, unsigned int flags);
 static ssize_t nfs_file_write(struct kiocb *, const struct iovec *iov,
 				unsigned long nr_segs, loff_t pos);
 static int  nfs_file_flush(struct file *, fl_owner_t id);
@@ -73,6 +76,7 @@ const struct file_operations nfs_file_operations = {
 	.lock		= nfs_lock,
 	.flock		= nfs_flock,
 	.splice_read	= nfs_file_splice_read,
+	.splice_write	= nfs_file_splice_write,
 	.check_flags	= nfs_check_flags,
 	.setlease	= nfs_setlease,
 };
@@ -587,12 +591,38 @@ static ssize_t nfs_file_write(struct kiocb *iocb, const struct iovec *iov,
 	goto out;
 }
 
+static ssize_t nfs_file_splice_write(struct pipe_inode_info *pipe,
+				     struct file *filp, loff_t *ppos,
+				     size_t count, unsigned int flags)
+{
+	struct dentry *dentry = filp->f_path.dentry;
+	struct inode *inode = dentry->d_inode;
+	ssize_t ret;
+
+	dprintk("NFS splice_write(%s/%s, %lu@%llu)\n",
+		dentry->d_parent->d_name.name, dentry->d_name.name,
+		(unsigned long) count, (unsigned long long) *ppos);
+
+	/*
+	 * The combination of splice and an O_APPEND destination is disallowed.
+	 */
+
+	nfs_add_stats(inode, NFSIOS_NORMALWRITTENBYTES, count);
+
+	ret = generic_file_splice_write(pipe, filp, ppos, count, flags);
+	if (ret >= 0 && nfs_need_sync_write(filp, inode)) {
+		int err = nfs_do_fsync(nfs_file_open_context(filp), inode);
+		if (err < 0)
+			ret = err;
+	}
+	return ret;
+}
+
 static int do_getlk(struct file *filp, int cmd, struct file_lock *fl)
 {
 	struct inode *inode = filp->f_mapping->host;
 	int status = 0;
 
-	lock_kernel();
 	/* Try local locking first */
 	posix_test_lock(filp, fl);
 	if (fl->fl_type != F_UNLCK) {
@@ -608,7 +638,6 @@ static int do_getlk(struct file *filp, int cmd, struct file_lock *fl)
 
 	status = NFS_PROTO(inode)->lock(filp, cmd, fl);
 out:
-	unlock_kernel();
 	return status;
 out_noconflict:
 	fl->fl_type = F_UNLCK;
@@ -650,13 +679,11 @@ static int do_unlk(struct file *filp, int cmd, struct file_lock *fl)
 	 * 	If we're signalled while cleaning up locks on process exit, we
 	 * 	still need to complete the unlock.
 	 */
-	lock_kernel();
 	/* Use local locking if mounted with "-onolock" */
 	if (!(NFS_SERVER(inode)->flags & NFS_MOUNT_NONLM))
 		status = NFS_PROTO(inode)->lock(filp, cmd, fl);
 	else
 		status = do_vfs_lock(filp, fl);
-	unlock_kernel();
 	return status;
 }
 
@@ -673,13 +700,11 @@ static int do_setlk(struct file *filp, int cmd, struct file_lock *fl)
 	if (status != 0)
 		goto out;
 
-	lock_kernel();
 	/* Use local locking if mounted with "-onolock" */
 	if (!(NFS_SERVER(inode)->flags & NFS_MOUNT_NONLM))
 		status = NFS_PROTO(inode)->lock(filp, cmd, fl);
 	else
 		status = do_vfs_lock(filp, fl);
-	unlock_kernel();
 	if (status < 0)
 		goto out;
 	/*

fs/nfs/internal.h

@@ -42,6 +42,12 @@ struct nfs_clone_mount {
 	rpc_authflavor_t authflavor;
 };
 
+/*
+ * Note: RFC 1813 doesn't limit the number of auth flavors that
+ * a server can return, so make something up.
+ */
+#define NFS_MAX_SECFLAVORS	(12)
+
 /*
  * In-kernel mount arguments
  */
@@ -91,6 +97,8 @@ struct nfs_mount_request {
 	unsigned short		protocol;
 	struct nfs_fh		*fh;
 	int			noresvport;
+	unsigned int		*auth_flav_len;
+	rpc_authflavor_t	*auth_flavs;
 };
 
 extern int nfs_mount(struct nfs_mount_request *info);

fs/nfs/nfs3acl.c

@@ -207,8 +207,6 @@ struct posix_acl *nfs3_proc_getacl(struct inode *inode, int type)
 	status = nfs_revalidate_inode(server, inode);
 	if (status < 0)
 		return ERR_PTR(status);
-	if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
-		nfs_zap_acl_cache(inode);
 	acl = nfs3_get_cached_acl(inode, type);
 	if (acl != ERR_PTR(-EAGAIN))
 		return acl;

fs/nfs/nfs4proc.c

@@ -1173,16 +1173,30 @@ int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state
 		err = _nfs4_open_delegation_recall(ctx, state, stateid);
 		switch (err) {
 			case 0:
-				return err;
+			case -ENOENT:
+			case -ESTALE:
+				goto out;
 			case -NFS4ERR_STALE_CLIENTID:
 			case -NFS4ERR_STALE_STATEID:
 			case -NFS4ERR_EXPIRED:
 				/* Don't recall a delegation if it was lost */
 				nfs4_schedule_state_recovery(server->nfs_client);
-				return err;
+				goto out;
+			case -ERESTARTSYS:
+				/*
+				 * The show must go on: exit, but mark the
+				 * stateid as needing recovery.
+				 */
+			case -NFS4ERR_ADMIN_REVOKED:
+			case -NFS4ERR_BAD_STATEID:
+				nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
+			case -ENOMEM:
+				err = 0;
+				goto out;
 		}
 		err = nfs4_handle_exception(server, err, &exception);
 	} while (exception.retry);
+out:
 	return err;
 }
 
@@ -3238,8 +3252,6 @@ static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
 	ret = nfs_revalidate_inode(server, inode);
 	if (ret < 0)
 		return ret;
-	if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
-		nfs_zap_acl_cache(inode);
 	ret = nfs4_read_cached_acl(inode, buf, buflen);
 	if (ret != -ENOENT)
 		return ret;
@@ -3977,8 +3989,6 @@ static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *f
 	ret = nfs4_wait_for_completion_rpc_task(task);
 	if (ret == 0) {
 		ret = data->rpc_status;
-		if (ret == -NFS4ERR_DENIED)
-			ret = -EAGAIN;
 	} else
 		data->cancelled = 1;
 	rpc_put_task(task);
@@ -4066,9 +4076,11 @@ static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *
 	int err;
 
 	do {
+		err = _nfs4_proc_setlk(state, cmd, request);
+		if (err == -NFS4ERR_DENIED)
+			err = -EAGAIN;
 		err = nfs4_handle_exception(NFS_SERVER(state->inode),
-				_nfs4_proc_setlk(state, cmd, request),
-				&exception);
+				err, &exception);
 	} while (exception.retry);
 	return err;
 }
@@ -4120,8 +4132,37 @@ int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
 		goto out;
 	do {
 		err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
-		if (err != -NFS4ERR_DELAY)
+		switch (err) {
+			default:
+				printk(KERN_ERR "%s: unhandled error %d.\n",
+						__func__, err);
+			case 0:
+			case -ESTALE:
+				goto out;
+			case -NFS4ERR_EXPIRED:
+			case -NFS4ERR_STALE_CLIENTID:
+			case -NFS4ERR_STALE_STATEID:
+				nfs4_schedule_state_recovery(server->nfs_client);
+				goto out;
+			case -ERESTARTSYS:
+				/*
+				 * The show must go on: exit, but mark the
+				 * stateid as needing recovery.
+				 */
+			case -NFS4ERR_ADMIN_REVOKED:
+			case -NFS4ERR_BAD_STATEID:
+			case -NFS4ERR_OPENMODE:
+				nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
+				err = 0;
+				goto out;
+			case -ENOMEM:
+			case -NFS4ERR_DENIED:
+				/* kill_proc(fl->fl_pid, SIGLOST, 1); */
+				err = 0;
+				goto out;
+			case -NFS4ERR_DELAY:
 				break;
+		}
 		err = nfs4_handle_exception(server, err, &exception);
 	} while (exception.retry);
 out:

fs/nfs/nfs4state.c

@@ -853,32 +853,45 @@ static int nfs4_reclaim_locks(struct nfs4_state *state, const struct nfs4_state_
 	struct file_lock *fl;
 	int status = 0;
 
+	if (inode->i_flock == NULL)
+		return 0;
+
+	/* Guard against delegation returns and new lock/unlock calls */
 	down_write(&nfsi->rwsem);
+	/* Protect inode->i_flock using the BKL */
+	lock_kernel();
 	for (fl = inode->i_flock; fl != NULL; fl = fl->fl_next) {
 		if (!(fl->fl_flags & (FL_POSIX|FL_FLOCK)))
 			continue;
 		if (nfs_file_open_context(fl->fl_file)->state != state)
 			continue;
+		unlock_kernel();
 		status = ops->recover_lock(state, fl);
-		if (status >= 0)
-			continue;
 		switch (status) {
+			case 0:
+				break;
+			case -ESTALE:
+			case -NFS4ERR_ADMIN_REVOKED:
+			case -NFS4ERR_STALE_STATEID:
+			case -NFS4ERR_BAD_STATEID:
+			case -NFS4ERR_EXPIRED:
+			case -NFS4ERR_NO_GRACE:
+			case -NFS4ERR_STALE_CLIENTID:
+				goto out;
 			default:
 				printk(KERN_ERR "%s: unhandled error %d. Zeroing state\n",
 						__func__, status);
-			case -NFS4ERR_EXPIRED:
-			case -NFS4ERR_NO_GRACE:
+			case -ENOMEM:
+			case -NFS4ERR_DENIED:
 			case -NFS4ERR_RECLAIM_BAD:
 			case -NFS4ERR_RECLAIM_CONFLICT:
 				/* kill_proc(fl->fl_pid, SIGLOST, 1); */
-				break;
-			case -NFS4ERR_STALE_CLIENTID:
-				goto out_err;
+				status = 0;
 		}
+		lock_kernel();
 	}
-	up_write(&nfsi->rwsem);
-	return 0;
-out_err:
+	unlock_kernel();
+out:
 	up_write(&nfsi->rwsem);
 	return status;
 }
@@ -924,6 +937,7 @@ static int nfs4_reclaim_open_state(struct nfs4_state_owner *sp, const struct nfs
 				printk(KERN_ERR "%s: unhandled error %d. Zeroing state\n",
 						__func__, status);
 			case -ENOENT:
+			case -ENOMEM:
 			case -ESTALE:
 				/*
 				 * Open state on this file cannot be recovered
@@ -934,6 +948,9 @@ static int nfs4_reclaim_open_state(struct nfs4_state_owner *sp, const struct nfs
 				/* Mark the file as being 'closed' */
 				state->state = 0;
 				break;
+			case -NFS4ERR_ADMIN_REVOKED:
+			case -NFS4ERR_STALE_STATEID:
+			case -NFS4ERR_BAD_STATEID:
 			case -NFS4ERR_RECLAIM_BAD:
 			case -NFS4ERR_RECLAIM_CONFLICT:
 				nfs4_state_mark_reclaim_nograce(sp->so_client, state);

fs/nfs/nfsroot.c

@@ -92,6 +92,9 @@
 #undef NFSROOT_DEBUG
 #define NFSDBG_FACILITY NFSDBG_ROOT
 
+/* Default port to use if server is not running a portmapper */
+#define NFS_MNT_PORT	627
+
 /* Default path we try to mount. "%s" gets replaced by our IP address */
 #define NFS_ROOT		"/tftpboot/%s"
 
@@ -487,6 +490,7 @@ static int __init root_nfs_get_handle(void)
 {
 	struct nfs_fh fh;
 	struct sockaddr_in sin;
+	unsigned int auth_flav_len = 0;
 	struct nfs_mount_request request = {
 		.sap		= (struct sockaddr *)&sin,
 		.salen		= sizeof(sin),
@@ -496,6 +500,7 @@ static int __init root_nfs_get_handle(void)
 		.protocol	= (nfs_data.flags & NFS_MOUNT_TCP) ?
 					XPRT_TRANSPORT_TCP : XPRT_TRANSPORT_UDP,
 		.fh		= &fh,
+		.auth_flav_len	= &auth_flav_len,
 	};
 	int status;
 

include/linux/lockd/lockd.h

@@ -195,7 +195,7 @@ extern struct svc_procedure	nlmsvc_procedures4[];
 extern int			nlmsvc_grace_period;
 extern unsigned long		nlmsvc_timeout;
 extern int			nsm_use_hostnames;
-extern int			nsm_local_state;
+extern u32			nsm_local_state;
 
 /*
  * Lockd client functions

include/linux/nfs.h

@@ -26,7 +26,8 @@
 #define NFSMODE_FIFO	0010000
 
 #define NFS_MNT_PROGRAM		100005
-#define NFS_MNT_PORT	627
+#define NFS_MNT_VERSION		1
+#define NFS_MNT3_VERSION	3
 
 /*
  * NFS stats. The good thing with these values is that NFSv3 errors are

include/linux/nfs2.h

@@ -64,11 +64,4 @@ struct nfs2_fh {
 #define NFSPROC_READDIR		16
 #define NFSPROC_STATFS		17
 
-#define NFS_MNT_PROGRAM		100005
-#define NFS_MNT_VERSION		1
-#define MNTPROC_NULL		0
-#define MNTPROC_MNT		1
-#define MNTPROC_UMNT		3
-#define MNTPROC_UMNTALL		4
-
 #endif /* _LINUX_NFS2_H */

include/linux/nfs3.h

@@ -88,12 +88,7 @@ struct nfs3_fh {
 #define NFS3PROC_PATHCONF	20
 #define NFS3PROC_COMMIT		21
 
-#define NFS_MNT3_PROGRAM	100005
 #define NFS_MNT3_VERSION	3
-#define MOUNTPROC3_NULL		0
-#define MOUNTPROC3_MNT		1
-#define MOUNTPROC3_UMNT		3
-#define MOUNTPROC3_UMNTALL	4
  
 
 #if defined(__KERNEL__)

net/sunrpc/xprtsock.c

@@ -1965,6 +1965,7 @@ static void xs_tcp_setup_socket(struct rpc_xprt *xprt,
 		 */
 		set_bit(XPRT_CONNECTION_CLOSE, &xprt->state);
 		xprt_force_disconnect(xprt);
+		break;
 	case -ECONNREFUSED:
 	case -ECONNRESET:
 	case -ENETUNREACH: