Merge git://git.linux-nfs.org/pub/linux/nfs-2.6

* git://git.linux-nfs.org/pub/linux/nfs-2.6: (122 commits)
  sunrpc: drop BKL around wrap and unwrap
  NFSv4: Make sure unlock is really an unlock when cancelling a lock
  NLM: fix source address of callback to client
  SUNRPC client: add interface for binding to a local address
  SUNRPC server: record the destination address of a request
  SUNRPC: cleanup transport creation argument passing
  NFSv4: Make the NFS state model work with the nosharedcache mount option
  NFS: Error when mounting the same filesystem with different options
  NFS: Add the mount option "nosharecache"
  NFS: Add support for mounting NFSv4 file systems with string options
  NFS: Add final pieces to support in-kernel mount option parsing
  NFS: Introduce generic mount client API
  NFS: Add enums and match tables for mount option parsing
  NFS: Improve debugging output in NFS in-kernel mount client
  NFS: Clean up in-kernel NFS mount
  NFS: Remake nfsroot_mount as a permanent part of NFS client
  SUNRPC: Add a convenient default for the hostname when calling rpc_create()
  SUNRPC: Rename rpcb_getport to be consistent with new rpcb_getport_sync name
  SUNRPC: Rename rpcb_getport_external routine
  SUNRPC: Allow rpcbind requests to be interrupted by a signal.
  ...

fs/lockd/host.c

@@ -44,9 +44,8 @@ static struct nsm_handle *	nsm_find(const struct sockaddr_in *sin,
  */
 static struct nlm_host *
 nlm_lookup_host(int server, const struct sockaddr_in *sin,
-					int proto, int version,
-					const char *hostname,
-					int hostname_len)
+		int proto, int version, const char *hostname,
+		int hostname_len, const struct sockaddr_in *ssin)
 {
 	struct hlist_head *chain;
 	struct hlist_node *pos;
@@ -54,7 +53,9 @@ nlm_lookup_host(int server, const struct sockaddr_in *sin,
 	struct nsm_handle *nsm = NULL;
 	int		hash;
 
-	dprintk("lockd: nlm_lookup_host(%u.%u.%u.%u, p=%d, v=%d, my role=%s, name=%.*s)\n",
+	dprintk("lockd: nlm_lookup_host("NIPQUAD_FMT"->"NIPQUAD_FMT
+			", p=%d, v=%d, my role=%s, name=%.*s)\n",
+			NIPQUAD(ssin->sin_addr.s_addr),
 			NIPQUAD(sin->sin_addr.s_addr), proto, version,
 			server? "server" : "client",
 			hostname_len,
@@ -91,6 +92,8 @@ nlm_lookup_host(int server, const struct sockaddr_in *sin,
 			continue;
 		if (host->h_server != server)
 			continue;
+		if (!nlm_cmp_addr(&host->h_saddr, ssin))
+			continue;
 
 		/* Move to head of hash chain. */
 		hlist_del(&host->h_hash);
@@ -118,6 +121,7 @@ nlm_lookup_host(int server, const struct sockaddr_in *sin,
 	host->h_name	   = nsm->sm_name;
 	host->h_addr       = *sin;
 	host->h_addr.sin_port = 0;	/* ouch! */
+	host->h_saddr	   = *ssin;
 	host->h_version    = version;
 	host->h_proto      = proto;
 	host->h_rpcclnt    = NULL;
@@ -161,15 +165,9 @@ nlm_destroy_host(struct nlm_host *host)
 	 */
 	nsm_unmonitor(host);
 
-	if ((clnt = host->h_rpcclnt) != NULL) {
-		if (atomic_read(&clnt->cl_users)) {
-			printk(KERN_WARNING
-				"lockd: active RPC handle\n");
-			clnt->cl_dead = 1;
-		} else {
-			rpc_destroy_client(host->h_rpcclnt);
-		}
-	}
+	clnt = host->h_rpcclnt;
+	if (clnt != NULL)
+		rpc_shutdown_client(clnt);
 	kfree(host);
 }
 
@@ -180,8 +178,10 @@ struct nlm_host *
 nlmclnt_lookup_host(const struct sockaddr_in *sin, int proto, int version,
 			const char *hostname, int hostname_len)
 {
+	struct sockaddr_in ssin = {0};
+
 	return nlm_lookup_host(0, sin, proto, version,
-			       hostname, hostname_len);
+			       hostname, hostname_len, &ssin);
 }
 
 /*
@@ -191,9 +191,12 @@ struct nlm_host *
 nlmsvc_lookup_host(struct svc_rqst *rqstp,
 			const char *hostname, int hostname_len)
 {
+	struct sockaddr_in ssin = {0};
+
+	ssin.sin_addr = rqstp->rq_daddr.addr;
 	return nlm_lookup_host(1, svc_addr_in(rqstp),
 			       rqstp->rq_prot, rqstp->rq_vers,
-			       hostname, hostname_len);
+			       hostname, hostname_len, &ssin);
 }
 
 /*
@@ -204,8 +207,9 @@ nlm_bind_host(struct nlm_host *host)
 {
 	struct rpc_clnt	*clnt;
 
-	dprintk("lockd: nlm_bind_host(%08x)\n",
-			(unsigned)ntohl(host->h_addr.sin_addr.s_addr));
+	dprintk("lockd: nlm_bind_host("NIPQUAD_FMT"->"NIPQUAD_FMT")\n",
+			NIPQUAD(host->h_saddr.sin_addr),
+			NIPQUAD(host->h_addr.sin_addr));
 
 	/* Lock host handle */
 	mutex_lock(&host->h_mutex);
@@ -232,6 +236,7 @@ nlm_bind_host(struct nlm_host *host)
 			.protocol	= host->h_proto,
 			.address	= (struct sockaddr *)&host->h_addr,
 			.addrsize	= sizeof(host->h_addr),
+			.saddress	= (struct sockaddr *)&host->h_saddr,
 			.timeout	= &timeparms,
 			.servername	= host->h_name,
 			.program	= &nlm_program,

fs/lockd/mon.c

@@ -61,6 +61,7 @@ nsm_mon_unmon(struct nsm_handle *nsm, u32 proc, struct nsm_res *res)
 			status);
 	else
 		status = 0;
+	rpc_shutdown_client(clnt);
  out:
 	return status;
 }
@@ -138,7 +139,6 @@ nsm_create(void)
 		.program	= &nsm_program,
 		.version	= SM_VERSION,
 		.authflavor	= RPC_AUTH_NULL,
-		.flags		= (RPC_CLNT_CREATE_ONESHOT),
 	};
 
 	return rpc_create(&args);

fs/lockd/svc.c

@@ -123,9 +123,6 @@ lockd(struct svc_rqst *rqstp)
 	/* Process request with signals blocked, but allow SIGKILL.  */
 	allow_signal(SIGKILL);
 
-	/* kick rpciod */
-	rpciod_up();
-
 	dprintk("NFS locking service started (ver " LOCKD_VERSION ").\n");
 
 	if (!nlm_timeout)
@@ -202,9 +199,6 @@ lockd(struct svc_rqst *rqstp)
 	/* Exit the RPC thread */
 	svc_exit_thread(rqstp);
 
-	/* release rpciod */
-	rpciod_down();
-
 	/* Release module */
 	unlock_kernel();
 	module_put_and_exit(0);

fs/nfs/Makefile

@@ -6,8 +6,8 @@ obj-$(CONFIG_NFS_FS) += nfs.o
 
 nfs-y 			:= client.o dir.o file.o getroot.o inode.o super.o nfs2xdr.o \
 			   pagelist.o proc.o read.o symlink.o unlink.o \
-			   write.o namespace.o
-nfs-$(CONFIG_ROOT_NFS)	+= nfsroot.o mount_clnt.o      
+			   write.o namespace.o mount_clnt.o
+nfs-$(CONFIG_ROOT_NFS)	+= nfsroot.o
 nfs-$(CONFIG_NFS_V3)	+= nfs3proc.o nfs3xdr.o
 nfs-$(CONFIG_NFS_V3_ACL)	+= nfs3acl.o
 nfs-$(CONFIG_NFS_V4)	+= nfs4proc.o nfs4xdr.o nfs4state.o nfs4renewd.o \

fs/nfs/client.c

@@ -102,19 +102,10 @@ static struct nfs_client *nfs_alloc_client(const char *hostname,
 					   int nfsversion)
 {
 	struct nfs_client *clp;
-	int error;
 
 	if ((clp = kzalloc(sizeof(*clp), GFP_KERNEL)) == NULL)
 		goto error_0;
 
-	error = rpciod_up();
-	if (error < 0) {
-		dprintk("%s: couldn't start rpciod! Error = %d\n",
-				__FUNCTION__, error);
-		goto error_1;
-	}
-	__set_bit(NFS_CS_RPCIOD, &clp->cl_res_state);
-
 	if (nfsversion == 4) {
 		if (nfs_callback_up() < 0)
 			goto error_2;
@@ -139,8 +130,6 @@ static struct nfs_client *nfs_alloc_client(const char *hostname,
 #ifdef CONFIG_NFS_V4
 	init_rwsem(&clp->cl_sem);
 	INIT_LIST_HEAD(&clp->cl_delegations);
-	INIT_LIST_HEAD(&clp->cl_state_owners);
-	INIT_LIST_HEAD(&clp->cl_unused);
 	spin_lock_init(&clp->cl_lock);
 	INIT_DELAYED_WORK(&clp->cl_renewd, nfs4_renew_state);
 	rpc_init_wait_queue(&clp->cl_rpcwaitq, "NFS client");
@@ -154,9 +143,6 @@ static struct nfs_client *nfs_alloc_client(const char *hostname,
 	if (__test_and_clear_bit(NFS_CS_CALLBACK, &clp->cl_res_state))
 		nfs_callback_down();
 error_2:
-	rpciod_down();
-	__clear_bit(NFS_CS_RPCIOD, &clp->cl_res_state);
-error_1:
 	kfree(clp);
 error_0:
 	return NULL;
@@ -167,16 +153,7 @@ static void nfs4_shutdown_client(struct nfs_client *clp)
 #ifdef CONFIG_NFS_V4
 	if (__test_and_clear_bit(NFS_CS_RENEWD, &clp->cl_res_state))
 		nfs4_kill_renewd(clp);
-	while (!list_empty(&clp->cl_unused)) {
-		struct nfs4_state_owner *sp;
-
-		sp = list_entry(clp->cl_unused.next,
-				struct nfs4_state_owner,
-				so_list);
-		list_del(&sp->so_list);
-		kfree(sp);
-	}
-	BUG_ON(!list_empty(&clp->cl_state_owners));
+	BUG_ON(!RB_EMPTY_ROOT(&clp->cl_state_owners));
 	if (__test_and_clear_bit(NFS_CS_IDMAP, &clp->cl_res_state))
 		nfs_idmap_delete(clp);
 #endif
@@ -198,9 +175,6 @@ static void nfs_free_client(struct nfs_client *clp)
 	if (__test_and_clear_bit(NFS_CS_CALLBACK, &clp->cl_res_state))
 		nfs_callback_down();
 
-	if (__test_and_clear_bit(NFS_CS_RPCIOD, &clp->cl_res_state))
-		rpciod_down();
-
 	kfree(clp->cl_hostname);
 	kfree(clp);
 

fs/nfs/delegation.h

@@ -22,11 +22,12 @@ struct nfs_delegation {
 	long flags;
 	loff_t maxsize;
 	__u64 change_attr;
+	struct rcu_head rcu;
 };
 
 int nfs_inode_set_delegation(struct inode *inode, struct rpc_cred *cred, struct nfs_openres *res);
 void nfs_inode_reclaim_delegation(struct inode *inode, struct rpc_cred *cred, struct nfs_openres *res);
-int __nfs_inode_return_delegation(struct inode *inode);
+int nfs_inode_return_delegation(struct inode *inode);
 int nfs_async_inode_return_delegation(struct inode *inode, const nfs4_stateid *stateid);
 
 struct inode *nfs_delegation_find_inode(struct nfs_client *clp, const struct nfs_fh *fhandle);
@@ -39,27 +40,24 @@ void nfs_delegation_reap_unclaimed(struct nfs_client *clp);
 
 /* NFSv4 delegation-related procedures */
 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_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid);
 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)
 {
+	struct nfs_delegation *delegation;
+	int ret = 0;
+
 	flags &= FMODE_READ|FMODE_WRITE;
-	smp_rmb();
-	if ((NFS_I(inode)->delegation_state & flags) == flags)
-		return 1;
-	return 0;
+	rcu_read_lock();
+	delegation = rcu_dereference(NFS_I(inode)->delegation);
+	if (delegation != NULL && (delegation->type & flags) == flags)
+		ret = 1;
+	rcu_read_unlock();
+	return ret;
 }
 
-static inline int nfs_inode_return_delegation(struct inode *inode)
-{
-	int err = 0;
-
-	if (NFS_I(inode)->delegation != NULL)
-		err = __nfs_inode_return_delegation(inode);
-	return err;
-}
 #else
 static inline int nfs_have_delegation(struct inode *inode, int flags)
 {

fs/nfs/dir.c

@@ -897,14 +897,13 @@ int nfs_is_exclusive_create(struct inode *dir, struct nameidata *nd)
 	return (nd->intent.open.flags & O_EXCL) != 0;
 }
 
-static inline int nfs_reval_fsid(struct vfsmount *mnt, struct inode *dir,
-				 struct nfs_fh *fh, struct nfs_fattr *fattr)
+static inline int nfs_reval_fsid(struct inode *dir, const struct nfs_fattr *fattr)
 {
 	struct nfs_server *server = NFS_SERVER(dir);
 
 	if (!nfs_fsid_equal(&server->fsid, &fattr->fsid))
-		/* Revalidate fsid on root dir */
-		return __nfs_revalidate_inode(server, mnt->mnt_root->d_inode);
+		/* Revalidate fsid using the parent directory */
+		return __nfs_revalidate_inode(server, dir);
 	return 0;
 }
 
@@ -946,7 +945,7 @@ static struct dentry *nfs_lookup(struct inode *dir, struct dentry * dentry, stru
 		res = ERR_PTR(error);
 		goto out_unlock;
 	}
-	error = nfs_reval_fsid(nd->mnt, dir, &fhandle, &fattr);
+	error = nfs_reval_fsid(dir, &fattr);
 	if (error < 0) {
 		res = ERR_PTR(error);
 		goto out_unlock;
@@ -1244,7 +1243,7 @@ static int nfs_create(struct inode *dir, struct dentry *dentry, int mode,
 	attr.ia_mode = mode;
 	attr.ia_valid = ATTR_MODE;
 
-	if (nd && (nd->flags & LOOKUP_CREATE))
+	if ((nd->flags & LOOKUP_CREATE) != 0)
 		open_flags = nd->intent.open.flags;
 
 	lock_kernel();
@@ -1535,7 +1534,7 @@ static int nfs_symlink(struct inode *dir, struct dentry *dentry, const char *sym
 
 	lock_kernel();
 
-	page = alloc_page(GFP_KERNEL);
+	page = alloc_page(GFP_HIGHUSER);
 	if (!page) {
 		unlock_kernel();
 		return -ENOMEM;
@@ -1744,8 +1743,8 @@ int nfs_access_cache_shrinker(int nr_to_scan, gfp_t gfp_mask)
 	struct nfs_inode *nfsi;
 	struct nfs_access_entry *cache;
 
-	spin_lock(&nfs_access_lru_lock);
 restart:
+	spin_lock(&nfs_access_lru_lock);
 	list_for_each_entry(nfsi, &nfs_access_lru_list, access_cache_inode_lru) {
 		struct inode *inode;
 
@@ -1770,6 +1769,7 @@ int nfs_access_cache_shrinker(int nr_to_scan, gfp_t gfp_mask)
 			clear_bit(NFS_INO_ACL_LRU_SET, &nfsi->flags);
 		}
 		spin_unlock(&inode->i_lock);
+		spin_unlock(&nfs_access_lru_lock);
 		iput(inode);
 		goto restart;
 	}

fs/nfs/direct.c

@@ -266,7 +266,7 @@ static const struct rpc_call_ops nfs_read_direct_ops = {
 static ssize_t nfs_direct_read_schedule(struct nfs_direct_req *dreq, unsigned long user_addr, size_t count, loff_t pos)
 {
 	struct nfs_open_context *ctx = dreq->ctx;
-	struct inode *inode = ctx->dentry->d_inode;
+	struct inode *inode = ctx->path.dentry->d_inode;
 	size_t rsize = NFS_SERVER(inode)->rsize;
 	unsigned int pgbase;
 	int result;
@@ -295,9 +295,14 @@ static ssize_t nfs_direct_read_schedule(struct nfs_direct_req *dreq, unsigned lo
 			break;
 		}
 		if ((unsigned)result < data->npages) {
-			nfs_direct_release_pages(data->pagevec, result);
-			nfs_readdata_release(data);
-			break;
+			bytes = result * PAGE_SIZE;
+			if (bytes <= pgbase) {
+				nfs_direct_release_pages(data->pagevec, result);
+				nfs_readdata_release(data);
+				break;
+			}
+			bytes -= pgbase;
+			data->npages = result;
 		}
 
 		get_dreq(dreq);
@@ -601,7 +606,7 @@ static const struct rpc_call_ops nfs_write_direct_ops = {
 static ssize_t nfs_direct_write_schedule(struct nfs_direct_req *dreq, unsigned long user_addr, size_t count, loff_t pos, int sync)
 {
 	struct nfs_open_context *ctx = dreq->ctx;
-	struct inode *inode = ctx->dentry->d_inode;
+	struct inode *inode = ctx->path.dentry->d_inode;
 	size_t wsize = NFS_SERVER(inode)->wsize;
 	unsigned int pgbase;
 	int result;
@@ -630,9 +635,14 @@ static ssize_t nfs_direct_write_schedule(struct nfs_direct_req *dreq, unsigned l
 			break;
 		}
 		if ((unsigned)result < data->npages) {
-			nfs_direct_release_pages(data->pagevec, result);
-			nfs_writedata_release(data);
-			break;
+			bytes = result * PAGE_SIZE;
+			if (bytes <= pgbase) {
+				nfs_direct_release_pages(data->pagevec, result);
+				nfs_writedata_release(data);
+				break;
+			}
+			bytes -= pgbase;
+			data->npages = result;
 		}
 
 		get_dreq(dreq);
@@ -763,10 +773,8 @@ ssize_t nfs_file_direct_read(struct kiocb *iocb, const struct iovec *iov,
 		(unsigned long) count, (long long) pos);
 
 	if (nr_segs != 1)
-		return -EINVAL;
-
-	if (count < 0)
 		goto out;
+
 	retval = -EFAULT;
 	if (!access_ok(VERIFY_WRITE, buf, count))
 		goto out;
@@ -814,7 +822,7 @@ ssize_t nfs_file_direct_read(struct kiocb *iocb, const struct iovec *iov,
 ssize_t nfs_file_direct_write(struct kiocb *iocb, const struct iovec *iov,
 				unsigned long nr_segs, loff_t pos)
 {
-	ssize_t retval;
+	ssize_t retval = -EINVAL;
 	struct file *file = iocb->ki_filp;
 	struct address_space *mapping = file->f_mapping;
 	/* XXX: temporary */
@@ -827,7 +835,7 @@ ssize_t nfs_file_direct_write(struct kiocb *iocb, const struct iovec *iov,
 		(unsigned long) count, (long long) pos);
 
 	if (nr_segs != 1)
-		return -EINVAL;
+		goto out;
 
 	retval = generic_write_checks(file, &pos, &count, 0);
 	if (retval)

fs/nfs/inode.c

@@ -461,14 +461,14 @@ static struct nfs_open_context *alloc_nfs_open_context(struct vfsmount *mnt, str
 
 	ctx = kmalloc(sizeof(*ctx), GFP_KERNEL);
 	if (ctx != NULL) {
-		atomic_set(&ctx->count, 1);
-		ctx->dentry = dget(dentry);
-		ctx->vfsmnt = mntget(mnt);
+		ctx->path.dentry = dget(dentry);
+		ctx->path.mnt = mntget(mnt);
 		ctx->cred = get_rpccred(cred);
 		ctx->state = NULL;
 		ctx->lockowner = current->files;
 		ctx->error = 0;
 		ctx->dir_cookie = 0;
+		kref_init(&ctx->kref);
 	}
 	return ctx;
 }
@@ -476,27 +476,33 @@ static struct nfs_open_context *alloc_nfs_open_context(struct vfsmount *mnt, str
 struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx)
 {
 	if (ctx != NULL)
-		atomic_inc(&ctx->count);
+		kref_get(&ctx->kref);
 	return ctx;
 }
 
-void put_nfs_open_context(struct nfs_open_context *ctx)
+static void nfs_free_open_context(struct kref *kref)
 {
-	if (atomic_dec_and_test(&ctx->count)) {
-		if (!list_empty(&ctx->list)) {
-			struct inode *inode = ctx->dentry->d_inode;
-			spin_lock(&inode->i_lock);
-			list_del(&ctx->list);
-			spin_unlock(&inode->i_lock);
-		}
-		if (ctx->state != NULL)
-			nfs4_close_state(ctx->state, ctx->mode);
-		if (ctx->cred != NULL)
-			put_rpccred(ctx->cred);
-		dput(ctx->dentry);
-		mntput(ctx->vfsmnt);
-		kfree(ctx);
+	struct nfs_open_context *ctx = container_of(kref,
+			struct nfs_open_context, kref);
+
+	if (!list_empty(&ctx->list)) {
+		struct inode *inode = ctx->path.dentry->d_inode;
+		spin_lock(&inode->i_lock);
+		list_del(&ctx->list);
+		spin_unlock(&inode->i_lock);
 	}
+	if (ctx->state != NULL)
+		nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
+	if (ctx->cred != NULL)
+		put_rpccred(ctx->cred);
+	dput(ctx->path.dentry);
+	mntput(ctx->path.mnt);
+	kfree(ctx);
+}
+
+void put_nfs_open_context(struct nfs_open_context *ctx)
+{
+	kref_put(&ctx->kref, nfs_free_open_context);
 }
 
 /*
@@ -961,8 +967,8 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
 		goto out_changed;
 
 	server = NFS_SERVER(inode);
-	/* Update the fsid if and only if this is the root directory */
-	if (inode == inode->i_sb->s_root->d_inode
+	/* Update the fsid? */
+	if (S_ISDIR(inode->i_mode)
 			&& !nfs_fsid_equal(&server->fsid, &fattr->fsid))
 		server->fsid = fattr->fsid;
 
@@ -1066,8 +1072,10 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
 		invalid &= ~NFS_INO_INVALID_DATA;
 	if (data_stable)
 		invalid &= ~(NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ATIME|NFS_INO_REVAL_PAGECACHE);
-	if (!nfs_have_delegation(inode, FMODE_READ))
+	if (!nfs_have_delegation(inode, FMODE_READ) ||
+			(nfsi->cache_validity & NFS_INO_REVAL_FORCED))
 		nfsi->cache_validity |= invalid;
+	nfsi->cache_validity &= ~NFS_INO_REVAL_FORCED;
 
 	return 0;
  out_changed:
@@ -1103,27 +1111,10 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
  */
 void nfs4_clear_inode(struct inode *inode)
 {
-	struct nfs_inode *nfsi = NFS_I(inode);
-
 	/* If we are holding a delegation, return it! */
 	nfs_inode_return_delegation(inode);
 	/* First call standard NFS clear_inode() code */
 	nfs_clear_inode(inode);
-	/* Now clear out any remaining state */
-	while (!list_empty(&nfsi->open_states)) {
-		struct nfs4_state *state;
-		
-		state = list_entry(nfsi->open_states.next,
-				struct nfs4_state,
-				inode_states);
-		dprintk("%s(%s/%Ld): found unclaimed NFSv4 state %p\n",
-				__FUNCTION__,
-				inode->i_sb->s_id,
-				(long long)NFS_FILEID(inode),
-				state);
-		BUG_ON(atomic_read(&state->count) != 1);
-		nfs4_close_state(state, state->state);
-	}
 }
 #endif
 
@@ -1165,15 +1156,11 @@ static void init_once(void * foo, struct kmem_cache * cachep, unsigned long flag
 	struct nfs_inode *nfsi = (struct nfs_inode *) foo;
 
 	inode_init_once(&nfsi->vfs_inode);
-	spin_lock_init(&nfsi->req_lock);
-	INIT_LIST_HEAD(&nfsi->dirty);
-	INIT_LIST_HEAD(&nfsi->commit);
 	INIT_LIST_HEAD(&nfsi->open_files);
 	INIT_LIST_HEAD(&nfsi->access_cache_entry_lru);
 	INIT_LIST_HEAD(&nfsi->access_cache_inode_lru);
 	INIT_RADIX_TREE(&nfsi->nfs_page_tree, GFP_ATOMIC);
 	atomic_set(&nfsi->data_updates, 0);
-	nfsi->ndirty = 0;
 	nfsi->ncommit = 0;
 	nfsi->npages = 0;
 	nfs4_init_once(nfsi);

fs/nfs/internal.h

@@ -183,9 +183,9 @@ unsigned long nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp)
 /*
  * Calculate the number of 512byte blocks used.
  */
-static inline unsigned long nfs_calc_block_size(u64 tsize)
+static inline blkcnt_t nfs_calc_block_size(u64 tsize)
 {
-	loff_t used = (tsize + 511) >> 9;
+	blkcnt_t used = (tsize + 511) >> 9;
 	return (used > ULONG_MAX) ? ULONG_MAX : used;
 }
 

fs/nfs/mount_clnt.c

 /*
- * linux/fs/nfs/mount_clnt.c
- *
- * MOUNT client to support NFSroot.
+ * In-kernel MOUNT protocol client
  *
  * Copyright (C) 1997, Olaf Kirch <okir@monad.swb.de>
  */
@@ -18,33 +16,31 @@
 #include <linux/nfs_fs.h>
 
 #ifdef RPC_DEBUG
-# define NFSDBG_FACILITY	NFSDBG_ROOT
+# define NFSDBG_FACILITY	NFSDBG_MOUNT
 #endif
 
-/*
-#define MOUNT_PROGRAM		100005
-#define MOUNT_VERSION		1
-#define MOUNT_MNT		1
-#define MOUNT_UMNT		3
- */
-
-static struct rpc_clnt *	mnt_create(char *, struct sockaddr_in *,
-								int, int);
 static struct rpc_program	mnt_program;
 
 struct mnt_fhstatus {
-	unsigned int		status;
-	struct nfs_fh *		fh;
+	u32 status;
+	struct nfs_fh *fh;
 };
 
-/*
- * Obtain an NFS file handle for the given host and path
+/**
+ * nfs_mount - Obtain an NFS file handle for the given host and path
+ * @addr: pointer to server's address
+ * @len: size of server's address
+ * @hostname: name of server host, or NULL
+ * @path: pointer to string containing export path to mount
+ * @version: mount version to use for this request
+ * @protocol: transport protocol to use for thie request
+ * @fh: pointer to location to place returned file handle
+ *
+ * Uses default timeout parameters specified by underlying transport.
  */
-int
-nfsroot_mount(struct sockaddr_in *addr, char *path, struct nfs_fh *fh,
-		int version, int protocol)
+int nfs_mount(struct sockaddr *addr, size_t len, char *hostname, char *path,
+	      int version, int protocol, struct nfs_fh *fh)
 {
-	struct rpc_clnt		*mnt_clnt;
 	struct mnt_fhstatus	result = {
 		.fh		= fh
 	};
@@ -52,16 +48,25 @@ nfsroot_mount(struct sockaddr_in *addr, char *path, struct nfs_fh *fh,
 		.rpc_argp	= path,
 		.rpc_resp	= &result,
 	};
-	char			hostname[32];
+	struct rpc_create_args args = {
+		.protocol	= protocol,
+		.address	= addr,
+		.addrsize	= len,
+		.servername	= hostname,
+		.program	= &mnt_program,
+		.version	= version,
+		.authflavor	= RPC_AUTH_UNIX,
+		.flags		= RPC_CLNT_CREATE_INTR,
+	};
+	struct rpc_clnt		*mnt_clnt;
 	int			status;
 
-	dprintk("NFS:      nfs_mount(%08x:%s)\n",
-			(unsigned)ntohl(addr->sin_addr.s_addr), path);
+	dprintk("NFS: sending MNT request for %s:%s\n",
+		(hostname ? hostname : "server"), path);
 
-	sprintf(hostname, "%u.%u.%u.%u", NIPQUAD(addr->sin_addr.s_addr));
-	mnt_clnt = mnt_create(hostname, addr, version, protocol);
+	mnt_clnt = rpc_create(&args);
 	if (IS_ERR(mnt_clnt))
-		return PTR_ERR(mnt_clnt);
+		goto out_clnt_err;
 
 	if (version == NFS_MNT3_VERSION)
 		msg.rpc_proc = &mnt_clnt->cl_procinfo[MOUNTPROC3_MNT];
@@ -69,33 +74,39 @@ nfsroot_mount(struct sockaddr_in *addr, char *path, struct nfs_fh *fh,
 		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);
-}
+	rpc_shutdown_client(mnt_clnt);
 
-static struct rpc_clnt *
-mnt_create(char *hostname, struct sockaddr_in *srvaddr, int version,
-		int protocol)
-{
-	struct rpc_create_args args = {
-		.protocol	= protocol,
-		.address	= (struct sockaddr *)srvaddr,
-		.addrsize	= sizeof(*srvaddr),
-		.servername	= hostname,
-		.program	= &mnt_program,
-		.version	= version,
-		.authflavor	= RPC_AUTH_UNIX,
-		.flags		= (RPC_CLNT_CREATE_ONESHOT |
-				   RPC_CLNT_CREATE_INTR),
-	};
+	if (status < 0)
+		goto out_call_err;
+	if (result.status != 0)
+		goto out_mnt_err;
+
+	dprintk("NFS: MNT request succeeded\n");
+	status = 0;
+
+out:
+	return status;
+
+out_clnt_err:
+	status = PTR_ERR(mnt_clnt);
+	dprintk("NFS: failed to create RPC client, status=%d\n", status);
+	goto out;
+
+out_call_err:
+	dprintk("NFS: failed to start MNT request, status=%d\n", status);
+	goto out;
 
-	return rpc_create(&args);
+out_mnt_err:
+	dprintk("NFS: MNT server returned result %d\n", result.status);
+	status = -EACCES;
+	goto out;
 }
 
 /*
  * XDR encode/decode functions for MOUNT
  */
-static int
-xdr_encode_dirpath(struct rpc_rqst *req, __be32 *p, const char *path)
+static int xdr_encode_dirpath(struct rpc_rqst *req, __be32 *p,
+			      const char *path)
 {
 	p = xdr_encode_string(p, path);
 
@@ -103,8 +114,8 @@ xdr_encode_dirpath(struct rpc_rqst *req, __be32 *p, const char *path)
 	return 0;
 }
 
-static int
-xdr_decode_fhstatus(struct rpc_rqst *req, __be32 *p, struct mnt_fhstatus *res)
+static int xdr_decode_fhstatus(struct rpc_rqst *req, __be32 *p,
+			       struct mnt_fhstatus *res)
 {
 	struct nfs_fh *fh = res->fh;
 
@@ -115,8 +126,8 @@ xdr_decode_fhstatus(struct rpc_rqst *req, __be32 *p, struct mnt_fhstatus *res)
 	return 0;
 }
 
-static int
-xdr_decode_fhstatus3(struct rpc_rqst *req, __be32 *p, struct mnt_fhstatus *res)
+static int xdr_decode_fhstatus3(struct rpc_rqst *req, __be32 *p,
+				struct mnt_fhstatus *res)
 {
 	struct nfs_fh *fh = res->fh;
 
@@ -135,53 +146,53 @@ xdr_decode_fhstatus3(struct rpc_rqst *req, __be32 *p, struct mnt_fhstatus *res)
 #define MNT_fhstatus_sz		(1 + 8)
 #define MNT_fhstatus3_sz	(1 + 16)
 
-static struct rpc_procinfo	mnt_procedures[] = {
-[MNTPROC_MNT] = {
-	  .p_proc		= MNTPROC_MNT,
-	  .p_encode		= (kxdrproc_t) xdr_encode_dirpath,	
-	  .p_decode		= (kxdrproc_t) xdr_decode_fhstatus,
-	  .p_arglen		= MNT_dirpath_sz,
-	  .p_replen		= MNT_fhstatus_sz,
-	  .p_statidx		= MNTPROC_MNT,
-	  .p_name		= "MOUNT",
+static struct rpc_procinfo mnt_procedures[] = {
+	[MNTPROC_MNT] = {
+		.p_proc		= MNTPROC_MNT,
+		.p_encode	= (kxdrproc_t) xdr_encode_dirpath,
+		.p_decode	= (kxdrproc_t) xdr_decode_fhstatus,
+		.p_arglen	= MNT_dirpath_sz,
+		.p_replen	= MNT_fhstatus_sz,
+		.p_statidx	= MNTPROC_MNT,
+		.p_name		= "MOUNT",
 	},
 };
 
 static struct rpc_procinfo mnt3_procedures[] = {
-[MOUNTPROC3_MNT] = {
-	  .p_proc		= MOUNTPROC3_MNT,
-	  .p_encode		= (kxdrproc_t) xdr_encode_dirpath,
-	  .p_decode		= (kxdrproc_t) xdr_decode_fhstatus3,
-	  .p_arglen		= MNT_dirpath_sz,
-	  .p_replen		= MNT_fhstatus3_sz,
-	  .p_statidx		= MOUNTPROC3_MNT,
-	  .p_name		= "MOUNT",
+	[MOUNTPROC3_MNT] = {
+		.p_proc		= MOUNTPROC3_MNT,
+		.p_encode	= (kxdrproc_t) xdr_encode_dirpath,
+		.p_decode	= (kxdrproc_t) xdr_decode_fhstatus3,
+		.p_arglen	= MNT_dirpath_sz,
+		.p_replen	= MNT_fhstatus3_sz,
+		.p_statidx	= MOUNTPROC3_MNT,
+		.p_name		= "MOUNT",
 	},
 };
 
 
-static struct rpc_version	mnt_version1 = {
-		.number		= 1,
-		.nrprocs 	= 2,
-		.procs 		= mnt_procedures
+static struct rpc_version mnt_version1 = {
+	.number		= 1,
+	.nrprocs	= 2,
+	.procs		= mnt_procedures,
 };
 
-static struct rpc_version       mnt_version3 = {
-		.number		= 3,
-		.nrprocs	= 2,
-		.procs		= mnt3_procedures
+static struct rpc_version mnt_version3 = {
+	.number		= 3,
+	.nrprocs	= 2,
+	.procs		= mnt3_procedures,
 };
 
-static struct rpc_version *	mnt_version[] = {
+static struct rpc_version *mnt_version[] = {
 	NULL,
 	&mnt_version1,
 	NULL,
 	&mnt_version3,
 };
 
-static struct rpc_stat		mnt_stats;
+static struct rpc_stat mnt_stats;
 
-static struct rpc_program	mnt_program = {
+static struct rpc_program mnt_program = {
 	.name		= "mount",
 	.number		= NFS_MNT_PROGRAM,
 	.nrvers		= ARRAY_SIZE(mnt_version),

fs/nfs/nfs2xdr.c

@@ -223,7 +223,7 @@ nfs_xdr_diropargs(struct rpc_rqst *req, __be32 *p, struct nfs_diropargs *args)
 static int
 nfs_xdr_readargs(struct rpc_rqst *req, __be32 *p, struct nfs_readargs *args)
 {
-	struct rpc_auth	*auth = req->rq_task->tk_auth;
+	struct rpc_auth	*auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
 	unsigned int replen;
 	u32 offset = (u32)args->offset;
 	u32 count = args->count;
@@ -380,7 +380,7 @@ static int
 nfs_xdr_readdirargs(struct rpc_rqst *req, __be32 *p, struct nfs_readdirargs *args)
 {
 	struct rpc_task	*task = req->rq_task;
-	struct rpc_auth	*auth = task->tk_auth;
+	struct rpc_auth	*auth = task->tk_msg.rpc_cred->cr_auth;
 	unsigned int replen;
 	u32 count = args->count;
 
@@ -541,7 +541,7 @@ nfs_xdr_diropres(struct rpc_rqst *req, __be32 *p, struct nfs_diropok *res)
 static int
 nfs_xdr_readlinkargs(struct rpc_rqst *req, __be32 *p, struct nfs_readlinkargs *args)
 {
-	struct rpc_auth *auth = req->rq_task->tk_auth;
+	struct rpc_auth	*auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
 	unsigned int replen;
 
 	p = xdr_encode_fhandle(p, args->fh);

fs/nfs/nfs3proc.c

@@ -335,9 +335,7 @@ nfs3_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
 		 * not sure this buys us anything (and I'd have
 		 * to revamp the NFSv3 XDR code) */
 		status = nfs3_proc_setattr(dentry, &fattr, sattr);
-		if (status == 0)
-			nfs_setattr_update_inode(dentry->d_inode, sattr);
-		nfs_refresh_inode(dentry->d_inode, &fattr);
+		nfs_post_op_update_inode(dentry->d_inode, &fattr);
 		dprintk("NFS reply setattr (post-create): %d\n", status);
 	}
 	if (status != 0)

fs/nfs/nfs3xdr.c

@@ -319,7 +319,7 @@ nfs3_xdr_accessargs(struct rpc_rqst *req, __be32 *p, struct nfs3_accessargs *arg
 static int
 nfs3_xdr_readargs(struct rpc_rqst *req, __be32 *p, struct nfs_readargs *args)
 {
-	struct rpc_auth	*auth = req->rq_task->tk_auth;
+	struct rpc_auth	*auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
 	unsigned int replen;
 	u32 count = args->count;
 
@@ -458,7 +458,7 @@ nfs3_xdr_linkargs(struct rpc_rqst *req, __be32 *p, struct nfs3_linkargs *args)
 static int
 nfs3_xdr_readdirargs(struct rpc_rqst *req, __be32 *p, struct nfs3_readdirargs *args)
 {
-	struct rpc_auth	*auth = req->rq_task->tk_auth;
+	struct rpc_auth	*auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
 	unsigned int replen;
 	u32 count = args->count;
 
@@ -643,7 +643,7 @@ static int
 nfs3_xdr_getaclargs(struct rpc_rqst *req, __be32 *p,
 		    struct nfs3_getaclargs *args)
 {
-	struct rpc_auth *auth = req->rq_task->tk_auth;
+	struct rpc_auth	*auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
 	unsigned int replen;
 
 	p = xdr_encode_fhandle(p, args->fh);
@@ -773,7 +773,7 @@ nfs3_xdr_accessres(struct rpc_rqst *req, __be32 *p, struct nfs3_accessres *res)
 static int
 nfs3_xdr_readlinkargs(struct rpc_rqst *req, __be32 *p, struct nfs3_readlinkargs *args)
 {
-	struct rpc_auth *auth = req->rq_task->tk_auth;
+	struct rpc_auth	*auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
 	unsigned int replen;
 
 	p = xdr_encode_fhandle(p, args->fh);

fs/nfs/nfs4_fs.h

@@ -70,19 +70,26 @@ static inline void nfs_confirm_seqid(struct nfs_seqid_counter *seqid, int status
 		seqid->flags |= NFS_SEQID_CONFIRMED;
 }
 
+struct nfs_unique_id {
+	struct rb_node rb_node;
+	__u64 id;
+};
+
 /*
  * NFS4 state_owners and lock_owners are simply labels for ordered
  * sequences of RPC calls. Their sole purpose is to provide once-only
  * semantics by allowing the server to identify replayed requests.
  */
 struct nfs4_state_owner {
-	spinlock_t	     so_lock;
-	struct list_head     so_list;	 /* per-clientid list of state_owners */
+	struct nfs_unique_id so_owner_id;
 	struct nfs_client    *so_client;
-	u32                  so_id;      /* 32-bit identifier, unique */
-	atomic_t	     so_count;
+	struct nfs_server    *so_server;
+	struct rb_node	     so_client_node;
 
 	struct rpc_cred	     *so_cred;	 /* Associated cred */
+
+	spinlock_t	     so_lock;
+	atomic_t	     so_count;
 	struct list_head     so_states;
 	struct list_head     so_delegations;
 	struct nfs_seqid_counter so_seqid;
@@ -108,7 +115,7 @@ struct nfs4_lock_state {
 #define NFS_LOCK_INITIALIZED 1
 	int			ls_flags;
 	struct nfs_seqid_counter	ls_seqid;
-	u32			ls_id;
+	struct nfs_unique_id	ls_id;
 	nfs4_stateid		ls_stateid;
 	atomic_t		ls_count;
 };
@@ -116,7 +123,10 @@ struct nfs4_lock_state {
 /* bits for nfs4_state->flags */
 enum {
 	LK_STATE_IN_USE,
-	NFS_DELEGATED_STATE,
+	NFS_DELEGATED_STATE,		/* Current stateid is delegation */
+	NFS_O_RDONLY_STATE,		/* OPEN stateid has read-only state */
+	NFS_O_WRONLY_STATE,		/* OPEN stateid has write-only state */
+	NFS_O_RDWR_STATE,		/* OPEN stateid has read/write state */
 };
 
 struct nfs4_state {
@@ -130,11 +140,14 @@ struct nfs4_state {
 	unsigned long flags;		/* Do we hold any locks? */
 	spinlock_t state_lock;		/* Protects the lock_states list */
 
-	nfs4_stateid stateid;
+	seqlock_t seqlock;		/* Protects the stateid/open_stateid */
+	nfs4_stateid stateid;		/* Current stateid: may be delegation */
+	nfs4_stateid open_stateid;	/* OPEN stateid */
 
-	unsigned int n_rdonly;
-	unsigned int n_wronly;
-	unsigned int n_rdwr;
+	/* The following 3 fields are protected by owner->so_lock */
+	unsigned int n_rdonly;		/* Number of read-only references */
+	unsigned int n_wronly;		/* Number of write-only references */
+	unsigned int n_rdwr;		/* Number of read/write references */
 	int state;			/* State on the server (R,W, or RW) */
 	atomic_t count;
 };
@@ -165,7 +178,7 @@ extern int nfs4_proc_setclientid(struct nfs_client *, u32, unsigned short, struc
 extern int nfs4_proc_setclientid_confirm(struct nfs_client *, struct rpc_cred *);
 extern int nfs4_proc_async_renew(struct nfs_client *, struct rpc_cred *);
 extern int nfs4_proc_renew(struct nfs_client *, struct rpc_cred *);
-extern int nfs4_do_close(struct inode *inode, struct nfs4_state *state);
+extern int nfs4_do_close(struct path *path, struct nfs4_state *state);
 extern struct dentry *nfs4_atomic_open(struct inode *, struct dentry *, struct nameidata *);
 extern int nfs4_open_revalidate(struct inode *, struct dentry *, int, struct nameidata *);
 extern int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle);
@@ -189,14 +202,13 @@ extern void nfs4_renew_state(struct work_struct *);
 
 /* nfs4state.c */
 struct rpc_cred *nfs4_get_renew_cred(struct nfs_client *clp);
-extern u32 nfs4_alloc_lockowner_id(struct nfs_client *);
 
 extern struct nfs4_state_owner * nfs4_get_state_owner(struct nfs_server *, struct rpc_cred *);
 extern void nfs4_put_state_owner(struct nfs4_state_owner *);
 extern void nfs4_drop_state_owner(struct nfs4_state_owner *);
 extern struct nfs4_state * nfs4_get_open_state(struct inode *, struct nfs4_state_owner *);
 extern void nfs4_put_open_state(struct nfs4_state *);
-extern void nfs4_close_state(struct nfs4_state *, mode_t);
+extern void nfs4_close_state(struct path *, struct nfs4_state *, mode_t);
 extern void nfs4_state_set_mode_locked(struct nfs4_state *, mode_t);
 extern void nfs4_schedule_state_recovery(struct nfs_client *);
 extern void nfs4_put_lock_state(struct nfs4_lock_state *lsp);
@@ -222,7 +234,7 @@ extern struct svc_version nfs4_callback_version1;
 
 #else
 
-#define nfs4_close_state(a, b) do { } while (0)
+#define nfs4_close_state(a, b, c) do { } while (0)
 
 #endif /* CONFIG_NFS_V4 */
 #endif /* __LINUX_FS_NFS_NFS4_FS.H */

fs/nfs/nfsroot.c

@@ -428,7 +428,7 @@ static int __init root_nfs_getport(int program, int version, int proto)
 	printk(KERN_NOTICE "Looking up port of RPC %d/%d on %u.%u.%u.%u\n",
 		program, version, NIPQUAD(servaddr));
 	set_sockaddr(&sin, servaddr, 0);
-	return rpcb_getport_external(&sin, program, version, proto);
+	return rpcb_getport_sync(&sin, program, version, proto);
 }
 
 
@@ -496,7 +496,8 @@ static int __init root_nfs_get_handle(void)
 					NFS_MNT3_VERSION : NFS_MNT_VERSION;
 
 	set_sockaddr(&sin, servaddr, htons(mount_port));
-	status = nfsroot_mount(&sin, nfs_path, &fh, version, protocol);
+	status = nfs_mount((struct sockaddr *) &sin, sizeof(sin), NULL,
+			   nfs_path, version, protocol, &fh);
 	if (status < 0)
 		printk(KERN_ERR "Root-NFS: Server returned error %d "
 				"while mounting %s\n", status, nfs_path);

fs/nfs/pagelist.c

@@ -85,9 +85,8 @@ nfs_create_request(struct nfs_open_context *ctx, struct inode *inode,
 	req->wb_offset  = offset;
 	req->wb_pgbase	= offset;
 	req->wb_bytes   = count;
-	atomic_set(&req->wb_count, 1);
 	req->wb_context = get_nfs_open_context(ctx);
-
+	kref_init(&req->wb_kref);
 	return req;
 }
 
@@ -109,30 +108,31 @@ void nfs_unlock_request(struct nfs_page *req)
 }
 
 /**
- * nfs_set_page_writeback_locked - Lock a request for writeback
+ * nfs_set_page_tag_locked - Tag a request as locked
  * @req:
  */
-int nfs_set_page_writeback_locked(struct nfs_page *req)
+static int nfs_set_page_tag_locked(struct nfs_page *req)
 {
-	struct nfs_inode *nfsi = NFS_I(req->wb_context->dentry->d_inode);
+	struct nfs_inode *nfsi = NFS_I(req->wb_context->path.dentry->d_inode);
 
 	if (!nfs_lock_request(req))
 		return 0;
-	radix_tree_tag_set(&nfsi->nfs_page_tree, req->wb_index, NFS_PAGE_TAG_WRITEBACK);
+	radix_tree_tag_set(&nfsi->nfs_page_tree, req->wb_index, NFS_PAGE_TAG_LOCKED);
 	return 1;
 }
 
 /**
- * nfs_clear_page_writeback - Unlock request and wake up sleepers
+ * nfs_clear_page_tag_locked - Clear request tag and wake up sleepers
  */
-void nfs_clear_page_writeback(struct nfs_page *req)
+void nfs_clear_page_tag_locked(struct nfs_page *req)
 {
-	struct nfs_inode *nfsi = NFS_I(req->wb_context->dentry->d_inode);
+	struct inode *inode = req->wb_context->path.dentry->d_inode;
+	struct nfs_inode *nfsi = NFS_I(inode);
 
 	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);
+		spin_lock(&inode->i_lock);
+		radix_tree_tag_clear(&nfsi->nfs_page_tree, req->wb_index, NFS_PAGE_TAG_LOCKED);
+		spin_unlock(&inode->i_lock);
 	}
 	nfs_unlock_request(req);
 }
@@ -160,11 +160,9 @@ void nfs_clear_request(struct nfs_page *req)
  *
  * Note: Should never be called with the spinlock held!
  */
-void
-nfs_release_request(struct nfs_page *req)
+static void nfs_free_request(struct kref *kref)
 {
-	if (!atomic_dec_and_test(&req->wb_count))
-		return;
+	struct nfs_page *req = container_of(kref, struct nfs_page, wb_kref);
 
 	/* Release struct file or cached credential */
 	nfs_clear_request(req);
@@ -172,6 +170,11 @@ nfs_release_request(struct nfs_page *req)
 	nfs_page_free(req);
 }
 
+void nfs_release_request(struct nfs_page *req)
+{
+	kref_put(&req->wb_kref, nfs_free_request);
+}
+
 static int nfs_wait_bit_interruptible(void *word)
 {
 	int ret = 0;
@@ -193,7 +196,7 @@ static int nfs_wait_bit_interruptible(void *word)
 int
 nfs_wait_on_request(struct nfs_page *req)
 {
-        struct rpc_clnt	*clnt = NFS_CLIENT(req->wb_context->dentry->d_inode);
+	struct rpc_clnt *clnt = NFS_CLIENT(req->wb_context->path.dentry->d_inode);
 	sigset_t oldmask;
 	int ret = 0;
 
@@ -379,20 +382,20 @@ void nfs_pageio_cond_complete(struct nfs_pageio_descriptor *desc, pgoff_t index)
 /**
  * nfs_scan_list - Scan a list for matching requests
  * @nfsi: NFS inode
- * @head: One of the NFS inode request lists
  * @dst: Destination list
  * @idx_start: lower bound of page->index to scan
  * @npages: idx_start + npages sets the upper bound to scan.
+ * @tag: tag to scan for
  *
  * Moves elements from one of the inode request lists.
  * If the number of requests is set to 0, the entire address_space
  * starting at index idx_start, is scanned.
  * The requests are *not* checked to ensure that they form a contiguous set.
- * You must be holding the inode's req_lock when calling this function
+ * You must be holding the inode's i_lock when calling this function
  */
-int nfs_scan_list(struct nfs_inode *nfsi, struct list_head *head,
+int nfs_scan_list(struct nfs_inode *nfsi,
 		struct list_head *dst, pgoff_t idx_start,
-		unsigned int npages)
+		unsigned int npages, int tag)
 {
 	struct nfs_page *pgvec[NFS_SCAN_MAXENTRIES];
 	struct nfs_page *req;
@@ -407,9 +410,9 @@ int nfs_scan_list(struct nfs_inode *nfsi, struct list_head *head,
 		idx_end = idx_start + npages - 1;
 
 	for (;;) {
-		found = radix_tree_gang_lookup(&nfsi->nfs_page_tree,
+		found = radix_tree_gang_lookup_tag(&nfsi->nfs_page_tree,
 				(void **)&pgvec[0], idx_start,
-				NFS_SCAN_MAXENTRIES);
+				NFS_SCAN_MAXENTRIES, tag);
 		if (found <= 0)
 			break;
 		for (i = 0; i < found; i++) {
@@ -417,15 +420,18 @@ int nfs_scan_list(struct nfs_inode *nfsi, struct list_head *head,
 			if (req->wb_index > idx_end)
 				goto out;
 			idx_start = req->wb_index + 1;
-			if (req->wb_list_head != head)
-				continue;
-			if (nfs_set_page_writeback_locked(req)) {
+			if (nfs_set_page_tag_locked(req)) {
 				nfs_list_remove_request(req);
+				radix_tree_tag_clear(&nfsi->nfs_page_tree,
+						req->wb_index, tag);
 				nfs_list_add_request(req, dst);
 				res++;
+				if (res == INT_MAX)
+					goto out;
 			}
 		}
-
+		/* for latency reduction */
+		cond_resched_lock(&nfsi->vfs_inode.i_lock);
 	}
 out:
 	return res;

fs/nfs/read.c

@@ -145,8 +145,8 @@ static void nfs_readpage_release(struct nfs_page *req)
 	unlock_page(req->wb_page);
 
 	dprintk("NFS: read done (%s/%Ld %d@%Ld)\n",
-			req->wb_context->dentry->d_inode->i_sb->s_id,
-			(long long)NFS_FILEID(req->wb_context->dentry->d_inode),
+			req->wb_context->path.dentry->d_inode->i_sb->s_id,
+			(long long)NFS_FILEID(req->wb_context->path.dentry->d_inode),
 			req->wb_bytes,
 			(long long)req_offset(req));
 	nfs_clear_request(req);
@@ -164,7 +164,7 @@ static void nfs_read_rpcsetup(struct nfs_page *req, struct nfs_read_data *data,
 	int flags;
 
 	data->req	  = req;
-	data->inode	  = inode = req->wb_context->dentry->d_inode;
+	data->inode	  = inode = req->wb_context->path.dentry->d_inode;
 	data->cred	  = req->wb_context->cred;
 
 	data->args.fh     = NFS_FH(inode);
@@ -483,17 +483,19 @@ int nfs_readpage(struct file *file, struct page *page)
 	 */
 	error = nfs_wb_page(inode, page);
 	if (error)
-		goto out_error;
+		goto out_unlock;
+	if (PageUptodate(page))
+		goto out_unlock;
 
 	error = -ESTALE;
 	if (NFS_STALE(inode))
-		goto out_error;
+		goto out_unlock;
 
 	if (file == NULL) {
 		error = -EBADF;
 		ctx = nfs_find_open_context(inode, NULL, FMODE_READ);
 		if (ctx == NULL)
-			goto out_error;
+			goto out_unlock;
 	} else
 		ctx = get_nfs_open_context((struct nfs_open_context *)
 				file->private_data);
@@ -502,8 +504,7 @@ int nfs_readpage(struct file *file, struct page *page)
 
 	put_nfs_open_context(ctx);
 	return error;
-
-out_error:
+out_unlock:
 	unlock_page(page);
 	return error;
 }
@@ -520,21 +521,32 @@ readpage_async_filler(void *data, struct page *page)
 	struct inode *inode = page->mapping->host;
 	struct nfs_page *new;
 	unsigned int len;
+	int error;
+
+	error = nfs_wb_page(inode, page);
+	if (error)
+		goto out_unlock;
+	if (PageUptodate(page))
+		goto out_unlock;
 
-	nfs_wb_page(inode, page);
 	len = nfs_page_length(page);
 	if (len == 0)
 		return nfs_return_empty_page(page);
+
 	new = nfs_create_request(desc->ctx, inode, page, 0, len);
-	if (IS_ERR(new)) {
-			SetPageError(page);
-			unlock_page(page);
-			return PTR_ERR(new);
-	}
+	if (IS_ERR(new))
+		goto out_error;
+
 	if (len < PAGE_CACHE_SIZE)
 		zero_user_page(page, len, PAGE_CACHE_SIZE - len, KM_USER0);
 	nfs_pageio_add_request(desc->pgio, new);
 	return 0;
+out_error:
+	error = PTR_ERR(new);
+	SetPageError(page);
+out_unlock:
+	unlock_page(page);
+	return error;
 }
 
 int nfs_readpages(struct file *filp, struct address_space *mapping,

fs/nfsd/nfs4state.c

@@ -378,7 +378,6 @@ shutdown_callback_client(struct nfs4_client *clp)
 	if (clnt) {
 		clp->cl_callback.cb_client = NULL;
 		rpc_shutdown_client(clnt);
-		rpciod_down();
 	}
 }
 

include/linux/lockd/lockd.h

@@ -39,6 +39,7 @@
 struct nlm_host {
 	struct hlist_node	h_hash;		/* doubly linked list */
 	struct sockaddr_in	h_addr;		/* peer address */
+	struct sockaddr_in	h_saddr;	/* our address (optional) */
 	struct rpc_clnt	*	h_rpcclnt;	/* RPC client to talk to peer */
 	char *			h_name;		/* remote hostname */
 	u32			h_version;	/* interface version */

include/linux/nfs4.h

@@ -15,6 +15,7 @@
 
 #include <linux/types.h>
 
+#define NFS4_BITMAP_SIZE	2
 #define NFS4_VERIFIER_SIZE	8
 #define NFS4_STATEID_SIZE	16
 #define NFS4_FHSIZE		128

include/linux/nfs4_mount.h

@@ -65,6 +65,7 @@ struct nfs4_mount_data {
 #define NFS4_MOUNT_NOCTO	0x0010	/* 1 */
 #define NFS4_MOUNT_NOAC		0x0020	/* 1 */
 #define NFS4_MOUNT_STRICTLOCK	0x1000	/* 1 */
-#define NFS4_MOUNT_FLAGMASK	0xFFFF
+#define NFS4_MOUNT_UNSHARED	0x8000	/* 1 */
+#define NFS4_MOUNT_FLAGMASK	0x9033
 
 #endif

include/linux/nfs_mount.h

@@ -37,7 +37,7 @@ struct nfs_mount_data {
 	int		acdirmin;		/* 1 */
 	int		acdirmax;		/* 1 */
 	struct sockaddr_in addr;		/* 1 */
-	char		hostname[256];		/* 1 */
+	char		hostname[NFS_MAXNAMLEN + 1];		/* 1 */
 	int		namlen;			/* 2 */
 	unsigned int	bsize;			/* 3 */
 	struct nfs3_fh	root;			/* 4 */
@@ -62,6 +62,7 @@ struct nfs_mount_data {
 #define NFS_MOUNT_STRICTLOCK	0x1000	/* reserved for NFSv4 */
 #define NFS_MOUNT_SECFLAVOUR	0x2000	/* 5 */
 #define NFS_MOUNT_NORDIRPLUS	0x4000	/* 5 */
+#define NFS_MOUNT_UNSHARED	0x8000	/* 5 */
 #define NFS_MOUNT_FLAGMASK	0xFFFF
 
 #endif