Merge git://git.linux-nfs.org/projects/trondmy/nfs-2.6

* git://git.linux-nfs.org/projects/trondmy/nfs-2.6: (82 commits)
  NFSv4: Remove BKL from the nfsv4 state recovery
  SUNRPC: Remove the BKL from the callback functions
  NFS: Remove BKL from the readdir code
  NFS: Remove BKL from the symlink code
  NFS: Remove BKL from the sillydelete operations
  NFS: Remove the BKL from the rename, rmdir and unlink operations
  NFS: Remove BKL from NFS lookup code
  NFS: Remove the BKL from nfs_link()
  NFS: Remove the BKL from the inode creation operations
  NFS: Remove BKL usage from open()
  NFS: Remove BKL usage from the write path
  NFS: Remove the BKL from the permission checking code
  NFS: Remove attribute update related BKL references
  NFS: Remove BKL requirement from attribute updates
  NFS: Protect inode->i_nlink updates using inode->i_lock
  nfs: set correct fl_len in nlmclnt_test()
  SUNRPC: Support registering IPv6 interfaces with local rpcbind daemon
  SUNRPC: Refactor rpcb_register to make rpcbindv4 support easier
  SUNRPC: None of rpcb_create's callers wants a privileged source port
  SUNRPC: Introduce a specific rpcb_create for contacting localhost
  ...

22 files changed, 1395 insertions, 1048 deletions

diff --git a/fs/Kconfig b/fs/Kconfig
index 313b2e06ded5..84ab76a206a0 100644
--- a/fs/Kconfig
+++ b/fs/Kconfig
@@ -1544,10 +1544,6 @@ config UFS_FS
           The recently released UFS2 variant (used in FreeBSD 5.x) is
           READ-ONLY supported.
 
-          If you only intend to mount files from some other Unix over the
-          network using NFS, you don't need the UFS file system support (but
-          you need NFS file system support obviously).
-
           Note that this option is generally not needed for floppies, since a
           good portable way to transport files and directories between unixes
           (and even other operating systems) is given by the tar program ("man
@@ -1587,6 +1583,7 @@ menuconfig NETWORK_FILESYSTEMS
           Say Y here to get to see options for network filesystems and
           filesystem-related networking code, such as NFS daemon and
           RPCSEC security modules.
+
           This option alone does not add any kernel code.
 
           If you say N, all options in this submenu will be skipped and
@@ -1595,76 +1592,92 @@ menuconfig NETWORK_FILESYSTEMS
 if NETWORK_FILESYSTEMS
 
 config NFS_FS
-        tristate "NFS file system support"
+        tristate "NFS client support"
         depends on INET
         select LOCKD
         select SUNRPC
         select NFS_ACL_SUPPORT if NFS_V3_ACL
         help
-          If you are connected to some other (usually local) Unix computer
-          (using SLIP, PLIP, PPP or Ethernet) and want to mount files residing
-          on that computer (the NFS server) using the Network File Sharing
-          protocol, say Y. "Mounting files" means that the client can access
-          the files with usual UNIX commands as if they were sitting on the
-          client's hard disk. For this to work, the server must run the
-          programs nfsd and mountd (but does not need to have NFS file system
-          support enabled in its kernel). NFS is explained in the Network
-          Administrator's Guide, available from
-          <http://www.tldp.org/docs.html#guide>, on its man page: "man
-          nfs", and in the NFS-HOWTO.
-
-          A superior but less widely used alternative to NFS is provided by
-          the Coda file system; see "Coda file system support" below.
+          Choose Y here if you want to access files residing on other
+          computers using Sun's Network File System protocol.  To compile
+          this file system support as a module, choose M here: the module
+          will be called nfs.
 
-          If you say Y here, you should have said Y to TCP/IP networking also.
-          This option would enlarge your kernel by about 27 KB.
+          To mount file systems exported by NFS servers, you also need to
+          install the user space mount.nfs command which can be found in
+          the Linux nfs-utils package, available from http://linux-nfs.org/.
+          Information about using the mount command is available in the
+          mount(8) man page.  More detail about the Linux NFS client
+          implementation is available via the nfs(5) man page.
 
-          To compile this file system support as a module, choose M here: the
-          module will be called nfs.
+          Below you can choose which versions of the NFS protocol are
+          available in the kernel to mount NFS servers.  Support for NFS
+          version 2 (RFC 1094) is always available when NFS_FS is selected.
 
-          If you are configuring a diskless machine which will mount its root
-          file system over NFS at boot time, say Y here and to "Kernel
-          level IP autoconfiguration" above and to "Root file system on NFS"
-          below. You cannot compile this driver as a module in this case.
-          There are two packages designed for booting diskless machines over
-          the net: netboot, available from
-          <http://ftp1.sourceforge.net/netboot/>, and Etherboot,
-          available from <http://ftp1.sourceforge.net/etherboot/>.
+          To configure a system which mounts its root file system via NFS
+          at boot time, say Y here, select "Kernel level IP
+          autoconfiguration" in the NETWORK menu, and select "Root file
+          system on NFS" below.  You cannot compile this file system as a
+          module in this case.
 
-          If you don't know what all this is about, say N.
+          If unsure, say N.
 
 config NFS_V3
-        bool "Provide NFSv3 client support"
+        bool "NFS client support for NFS version 3"
         depends on NFS_FS
         help
-          Say Y here if you want your NFS client to be able to speak version
-          3 of the NFS protocol.
+          This option enables support for version 3 of the NFS protocol
+          (RFC 1813) in the kernel's NFS client.
 
           If unsure, say Y.
 
 config NFS_V3_ACL
-        bool "Provide client support for the NFSv3 ACL protocol extension"
+        bool "NFS client support for the NFSv3 ACL protocol extension"
         depends on NFS_V3
         help
-          Implement the NFSv3 ACL protocol extension for manipulating POSIX
-          Access Control Lists.  The server should also be compiled with
-          the NFSv3 ACL protocol extension; see the CONFIG_NFSD_V3_ACL option.
+          Some NFS servers support an auxiliary NFSv3 ACL protocol that
+          Sun added to Solaris but never became an official part of the
+          NFS version 3 protocol.  This protocol extension allows
+          applications on NFS clients to manipulate POSIX Access Control
+          Lists on files residing on NFS servers.  NFS servers enforce
+          ACLs on local files whether this protocol is available or not.
+
+          Choose Y here if your NFS server supports the Solaris NFSv3 ACL
+          protocol extension and you want your NFS client to allow
+          applications to access and modify ACLs on files on the server.
+
+          Most NFS servers don't support the Solaris NFSv3 ACL protocol
+          extension.  You can choose N here or specify the "noacl" mount
+          option to prevent your NFS client from trying to use the NFSv3
+          ACL protocol.
 
           If unsure, say N.
 
 config NFS_V4
-        bool "Provide NFSv4 client support (EXPERIMENTAL)"
+        bool "NFS client support for NFS version 4 (EXPERIMENTAL)"
         depends on NFS_FS && EXPERIMENTAL
         select RPCSEC_GSS_KRB5
         help
-          Say Y here if you want your NFS client to be able to speak the newer
-          version 4 of the NFS protocol.
+          This option enables support for version 4 of the NFS protocol
+          (RFC 3530) in the kernel's NFS client.
 
-          Note: Requires auxiliary userspace daemons which may be found on
-                http://www.citi.umich.edu/projects/nfsv4/
+          To mount NFS servers using NFSv4, you also need to install user
+          space programs which can be found in the Linux nfs-utils package,
+          available from http://linux-nfs.org/.
 
           If unsure, say N.
 
+config ROOT_NFS
+        bool "Root file system on NFS"
+        depends on NFS_FS=y && IP_PNP
+        help
+          If you want your system to mount its root file system via NFS,
+          choose Y here.  This is common practice for managing systems
+          without local permanent storage.  For details, read
+          <file:Documentation/filesystems/nfsroot.txt>.
+
+          Most people say N here.
+
 config NFSD
         tristate "NFS server support"
         depends on INET
@@ -1746,20 +1759,6 @@ config NFSD_V4
 
           If unsure, say N.
 
-config ROOT_NFS
-        bool "Root file system on NFS"
-        depends on NFS_FS=y && IP_PNP
-        help
-          If you want your Linux box to mount its whole root file system (the
-          one containing the directory /) from some other computer over the
-          net via NFS (presumably because your box doesn't have a hard disk),
-          say Y. Read <file:Documentation/filesystems/nfsroot.txt> for
-          details. It is likely that in this case, you also want to say Y to
-          "Kernel level IP autoconfiguration" so that your box can discover
-          its network address at boot time.
-
-          Most people say N here.
-
 config LOCKD
         tristate
 
@@ -1800,27 +1799,6 @@ config SUNRPC_XPRT_RDMA
 
           If unsure, say N.
 
-config SUNRPC_BIND34
-        bool "Support for rpcbind versions 3 & 4 (EXPERIMENTAL)"
-        depends on SUNRPC && EXPERIMENTAL
-        default n
-        help
-          RPC requests over IPv6 networks require support for larger
-          addresses when performing an RPC bind.  Sun added support for
-          IPv6 addressing by creating two new versions of the rpcbind
-          protocol (RFC 1833).
-
-          This option enables support in the kernel RPC client for
-          querying rpcbind servers via versions 3 and 4 of the rpcbind
-          protocol.  The kernel automatically falls back to version 2
-          if a remote rpcbind service does not support versions 3 or 4.
-          By themselves, these new versions do not provide support for
-          RPC over IPv6, but the new protocol versions are necessary to
-          support it.
-
-          If unsure, say N to get traditional behavior (version 2 rpcbind
-          requests only).
-
 config RPCSEC_GSS_KRB5
         tristate "Secure RPC: Kerberos V mechanism (EXPERIMENTAL)"
         depends on SUNRPC && EXPERIMENTAL
diff --git a/fs/lockd/clntproc.c b/fs/lockd/clntproc.c
index 5df517b81f3f..1f6dc518505c 100644
--- a/fs/lockd/clntproc.c
+++ b/fs/lockd/clntproc.c
@@ -224,7 +224,9 @@ void nlm_release_call(struct nlm_rqst *call)
 
 static void nlmclnt_rpc_release(void *data)
 {
+        lock_kernel();
         nlm_release_call(data);
+        unlock_kernel();
 }
 
 static int nlm_wait_on_grace(wait_queue_head_t *queue)
@@ -430,7 +432,7 @@ nlmclnt_test(struct nlm_rqst *req, struct file_lock *fl)
                          * 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_end = req->a_res.lock.fl.fl_end;
                         fl->fl_type = req->a_res.lock.fl.fl_type;
                         fl->fl_pid = 0;
                         break;
@@ -710,7 +712,9 @@ static void nlmclnt_unlock_callback(struct rpc_task *task, void *data)
 die:
         return;
  retry_rebind:
+        lock_kernel();
         nlm_rebind_host(req->a_host);
+        unlock_kernel();
  retry_unlock:
         rpc_restart_call(task);
 }
@@ -788,7 +792,9 @@ retry_cancel:
         /* Don't ever retry more than 3 times */
         if (req->a_retries++ >= NLMCLNT_MAX_RETRIES)
                 goto die;
+        lock_kernel();
         nlm_rebind_host(req->a_host);
+        unlock_kernel();
         rpc_restart_call(task);
         rpc_delay(task, 30 * HZ);
 }
diff --git a/fs/lockd/svc4proc.c b/fs/lockd/svc4proc.c
index 385437e3387d..2e27176ff42f 100644
--- a/fs/lockd/svc4proc.c
+++ b/fs/lockd/svc4proc.c
@@ -248,7 +248,9 @@ static void nlm4svc_callback_exit(struct rpc_task *task, void *data)
 
 static void nlm4svc_callback_release(void *data)
 {
+        lock_kernel();
         nlm_release_call(data);
+        unlock_kernel();
 }
 
 static const struct rpc_call_ops nlm4svc_callback_ops = {
diff --git a/fs/lockd/svclock.c b/fs/lockd/svclock.c
index 81aca859bfde..56a08ab9a4cb 100644
--- a/fs/lockd/svclock.c
+++ b/fs/lockd/svclock.c
@@ -795,6 +795,7 @@ static void nlmsvc_grant_callback(struct rpc_task *task, void *data)
 
         dprintk("lockd: GRANT_MSG RPC callback\n");
 
+        lock_kernel();
         /* if the block is not on a list at this point then it has
          * been invalidated. Don't try to requeue it.
          *
@@ -804,7 +805,7 @@ static void nlmsvc_grant_callback(struct rpc_task *task, void *data)
          * for nlm_blocked?
          */
         if (list_empty(&block->b_list))
-                return;
+                goto out;
 
         /* Technically, we should down the file semaphore here. Since we
          * move the block towards the head of the queue only, no harm
@@ -818,13 +819,17 @@ static void nlmsvc_grant_callback(struct rpc_task *task, void *data)
         }
         nlmsvc_insert_block(block, timeout);
         svc_wake_up(block->b_daemon);
+out:
+        unlock_kernel();
 }
 
 static void nlmsvc_grant_release(void *data)
 {
         struct nlm_rqst         *call = data;
 
+        lock_kernel();
         nlmsvc_release_block(call->a_block);
+        unlock_kernel();
 }
 
 static const struct rpc_call_ops nlmsvc_grant_ops = {
diff --git a/fs/lockd/svcproc.c b/fs/lockd/svcproc.c
index 88379cc6e0b1..ce6952b50a75 100644
--- a/fs/lockd/svcproc.c
+++ b/fs/lockd/svcproc.c
@@ -278,7 +278,9 @@ static void nlmsvc_callback_exit(struct rpc_task *task, void *data)
 
 static void nlmsvc_callback_release(void *data)
 {
+        lock_kernel();
         nlm_release_call(data);
+        unlock_kernel();
 }
 
 static const struct rpc_call_ops nlmsvc_callback_ops = {
diff --git a/fs/nfs/callback.c b/fs/nfs/callback.c
index c1e7c8300629..f447f4b4476c 100644
--- a/fs/nfs/callback.c
+++ b/fs/nfs/callback.c
@@ -27,7 +27,7 @@
 
 struct nfs_callback_data {
         unsigned int users;
-        struct svc_serv *serv;
+        struct svc_rqst *rqst;
         struct task_struct *task;
 };
 
@@ -91,21 +91,17 @@ nfs_callback_svc(void *vrqstp)
                 svc_process(rqstp);
         }
         unlock_kernel();
-        nfs_callback_info.task = NULL;
-        svc_exit_thread(rqstp);
         return 0;
 }
 
 /*
- * Bring up the server process if it is not already up.
+ * Bring up the callback thread if it is not already up.
  */
 int nfs_callback_up(void)
 {
         struct svc_serv *serv = NULL;
-        struct svc_rqst *rqstp;
         int ret = 0;
 
-        lock_kernel();
         mutex_lock(&nfs_callback_mutex);
         if (nfs_callback_info.users++ || nfs_callback_info.task != NULL)
                 goto out;
@@ -121,22 +117,23 @@ int nfs_callback_up(void)
         nfs_callback_tcpport = ret;
         dprintk("Callback port = 0x%x\n", nfs_callback_tcpport);
 
-        rqstp = svc_prepare_thread(serv, &serv->sv_pools[0]);
-        if (IS_ERR(rqstp)) {
-                ret = PTR_ERR(rqstp);
+        nfs_callback_info.rqst = svc_prepare_thread(serv, &serv->sv_pools[0]);
+        if (IS_ERR(nfs_callback_info.rqst)) {
+                ret = PTR_ERR(nfs_callback_info.rqst);
+                nfs_callback_info.rqst = NULL;
                 goto out_err;
         }
 
         svc_sock_update_bufs(serv);
-        nfs_callback_info.serv = serv;
 
-        nfs_callback_info.task = kthread_run(nfs_callback_svc, rqstp,
+        nfs_callback_info.task = kthread_run(nfs_callback_svc,
+                                             nfs_callback_info.rqst,
                                              "nfsv4-svc");
         if (IS_ERR(nfs_callback_info.task)) {
                 ret = PTR_ERR(nfs_callback_info.task);
-                nfs_callback_info.serv = NULL;
+                svc_exit_thread(nfs_callback_info.rqst);
+                nfs_callback_info.rqst = NULL;
                 nfs_callback_info.task = NULL;
-                svc_exit_thread(rqstp);
                 goto out_err;
         }
 out:
@@ -149,7 +146,6 @@ out:
         if (serv)
                 svc_destroy(serv);
         mutex_unlock(&nfs_callback_mutex);
-        unlock_kernel();
         return ret;
 out_err:
         dprintk("Couldn't create callback socket or server thread; err = %d\n",
@@ -159,17 +155,19 @@ out_err:
 }
 
 /*
- * Kill the server process if it is not already down.
+ * Kill the callback thread if it's no longer being used.
  */
 void nfs_callback_down(void)
 {
-        lock_kernel();
         mutex_lock(&nfs_callback_mutex);
         nfs_callback_info.users--;
-        if (nfs_callback_info.users == 0 && nfs_callback_info.task != NULL)
+        if (nfs_callback_info.users == 0 && nfs_callback_info.task != NULL) {
                 kthread_stop(nfs_callback_info.task);
+                svc_exit_thread(nfs_callback_info.rqst);
+                nfs_callback_info.rqst = NULL;
+                nfs_callback_info.task = NULL;
+        }
         mutex_unlock(&nfs_callback_mutex);
-        unlock_kernel();
 }
 
 static int nfs_callback_authenticate(struct svc_rqst *rqstp)
diff --git a/fs/nfs/client.c b/fs/nfs/client.c
index f2a092ca69b5..5ee23e7058b3 100644
--- a/fs/nfs/client.c
+++ b/fs/nfs/client.c
@@ -431,14 +431,14 @@ static void nfs_init_timeout_values(struct rpc_timeout *to, int proto,
 {
         to->to_initval = timeo * HZ / 10;
         to->to_retries = retrans;
-        if (!to->to_retries)
-                to->to_retries = 2;
 
         switch (proto) {
         case XPRT_TRANSPORT_TCP:
         case XPRT_TRANSPORT_RDMA:
+                if (to->to_retries == 0)
+                        to->to_retries = NFS_DEF_TCP_RETRANS;
                 if (to->to_initval == 0)
-                        to->to_initval = 60 * HZ;
+                        to->to_initval = NFS_DEF_TCP_TIMEO * HZ / 10;
                 if (to->to_initval > NFS_MAX_TCP_TIMEOUT)
                         to->to_initval = NFS_MAX_TCP_TIMEOUT;
                 to->to_increment = to->to_initval;
@@ -450,14 +450,17 @@ static void nfs_init_timeout_values(struct rpc_timeout *to, int proto,
                 to->to_exponential = 0;
                 break;
         case XPRT_TRANSPORT_UDP:
-        default:
+                if (to->to_retries == 0)
+                        to->to_retries = NFS_DEF_UDP_RETRANS;
                 if (!to->to_initval)
-                        to->to_initval = 11 * HZ / 10;
+                        to->to_initval = NFS_DEF_UDP_TIMEO * HZ / 10;
                 if (to->to_initval > NFS_MAX_UDP_TIMEOUT)
                         to->to_initval = NFS_MAX_UDP_TIMEOUT;
                 to->to_maxval = NFS_MAX_UDP_TIMEOUT;
                 to->to_exponential = 1;
                 break;
+        default:
+                BUG();
         }
 }
 
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index 982a2064fe4c..28a238dab23a 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -133,13 +133,14 @@ nfs_opendir(struct inode *inode, struct file *filp)
 {
         int res;
 
-        dfprintk(VFS, "NFS: opendir(%s/%ld)\n",
-                        inode->i_sb->s_id, inode->i_ino);
+        dfprintk(FILE, "NFS: open dir(%s/%s)\n",
+                        filp->f_path.dentry->d_parent->d_name.name,
+                        filp->f_path.dentry->d_name.name);
+
+        nfs_inc_stats(inode, NFSIOS_VFSOPEN);
 
-        lock_kernel();
         /* Call generic open code in order to cache credentials */
         res = nfs_open(inode, filp);
-        unlock_kernel();
         return res;
 }
 
@@ -528,13 +529,11 @@ 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",
+        dfprintk(FILE, "NFS: readdir(%s/%s) starting at cookie %llu\n",
                         dentry->d_parent->d_name.name, dentry->d_name.name,
                         (long long)filp->f_pos);
         nfs_inc_stats(inode, NFSIOS_VFSGETDENTS);
 
-        lock_kernel();
-
         /*
          * filp->f_pos points to the dirent entry number.
          * *desc->dir_cookie has the cookie for the next entry. We have
@@ -592,10 +591,9 @@ static int nfs_readdir(struct file *filp, void *dirent, filldir_t filldir)
         }
 out:
         nfs_unblock_sillyrename(dentry);
-        unlock_kernel();
         if (res > 0)
                 res = 0;
-        dfprintk(VFS, "NFS: readdir(%s/%s) returns %ld\n",
+        dfprintk(FILE, "NFS: readdir(%s/%s) returns %ld\n",
                         dentry->d_parent->d_name.name, dentry->d_name.name,
                         res);
         return res;
@@ -603,7 +601,15 @@ out:
 
 static loff_t nfs_llseek_dir(struct file *filp, loff_t offset, int origin)
 {
-        mutex_lock(&filp->f_path.dentry->d_inode->i_mutex);
+        struct dentry *dentry = filp->f_path.dentry;
+        struct inode *inode = dentry->d_inode;
+
+        dfprintk(FILE, "NFS: llseek dir(%s/%s, %lld, %d)\n",
+                        dentry->d_parent->d_name.name,
+                        dentry->d_name.name,
+                        offset, origin);
+
+        mutex_lock(&inode->i_mutex);
         switch (origin) {
                 case 1:
                         offset += filp->f_pos;
@@ -619,7 +625,7 @@ static loff_t nfs_llseek_dir(struct file *filp, loff_t offset, int origin)
                 nfs_file_open_context(filp)->dir_cookie = 0;
         }
 out:
-        mutex_unlock(&filp->f_path.dentry->d_inode->i_mutex);
+        mutex_unlock(&inode->i_mutex);
         return offset;
 }
 
@@ -629,10 +635,11 @@ out:
  */
 static int nfs_fsync_dir(struct file *filp, struct dentry *dentry, int datasync)
 {
-        dfprintk(VFS, "NFS: fsync_dir(%s/%s) datasync %d\n",
+        dfprintk(FILE, "NFS: fsync dir(%s/%s) datasync %d\n",
                         dentry->d_parent->d_name.name, dentry->d_name.name,
                         datasync);
 
+        nfs_inc_stats(dentry->d_inode, NFSIOS_VFSFSYNC);
         return 0;
 }
 
@@ -767,7 +774,6 @@ static int nfs_lookup_revalidate(struct dentry * dentry, struct nameidata *nd)
         struct nfs_fattr fattr;
 
         parent = dget_parent(dentry);
-        lock_kernel();
         dir = parent->d_inode;
         nfs_inc_stats(dir, NFSIOS_DENTRYREVALIDATE);
         inode = dentry->d_inode;
@@ -805,7 +811,6 @@ static int nfs_lookup_revalidate(struct dentry * dentry, struct nameidata *nd)
 
         nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
  out_valid:
-        unlock_kernel();
         dput(parent);
         dfprintk(LOOKUPCACHE, "NFS: %s(%s/%s) is valid\n",
                         __func__, dentry->d_parent->d_name.name,
@@ -824,7 +829,6 @@ out_zap_parent:
                 shrink_dcache_parent(dentry);
         }
         d_drop(dentry);
-        unlock_kernel();
         dput(parent);
         dfprintk(LOOKUPCACHE, "NFS: %s(%s/%s) is invalid\n",
                         __func__, dentry->d_parent->d_name.name,
@@ -858,6 +862,14 @@ static int nfs_dentry_delete(struct dentry *dentry)
 
 }
 
+static void nfs_drop_nlink(struct inode *inode)
+{
+        spin_lock(&inode->i_lock);
+        if (inode->i_nlink > 0)
+                drop_nlink(inode);
+        spin_unlock(&inode->i_lock);
+}
+
 /*
  * Called when the dentry loses inode.
  * We use it to clean up silly-renamed files.
@@ -869,10 +881,8 @@ static void nfs_dentry_iput(struct dentry *dentry, struct inode *inode)
                 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_DATA;
 
         if (dentry->d_flags & DCACHE_NFSFS_RENAMED) {
-                lock_kernel();
                 drop_nlink(inode);
                 nfs_complete_unlink(dentry, inode);
-                unlock_kernel();
         }
         iput(inode);
 }
@@ -903,8 +913,6 @@ static struct dentry *nfs_lookup(struct inode *dir, struct dentry * dentry, stru
         res = ERR_PTR(-ENOMEM);
         dentry->d_op = NFS_PROTO(dir)->dentry_ops;
 
-        lock_kernel();
-
         /*
          * If we're doing an exclusive create, optimize away the lookup
          * but don't hash the dentry.
@@ -912,7 +920,7 @@ static struct dentry *nfs_lookup(struct inode *dir, struct dentry * dentry, stru
         if (nfs_is_exclusive_create(dir, nd)) {
                 d_instantiate(dentry, NULL);
                 res = NULL;
-                goto out_unlock;
+                goto out;
         }
 
         parent = dentry->d_parent;
@@ -940,8 +948,6 @@ no_entry:
         nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
 out_unblock_sillyrename:
         nfs_unblock_sillyrename(parent);
-out_unlock:
-        unlock_kernel();
 out:
         return res;
 }
@@ -999,9 +1005,7 @@ static struct dentry *nfs_atomic_lookup(struct inode *dir, struct dentry *dentry
         }
 
         /* Open the file on the server */
-        lock_kernel();
         res = nfs4_atomic_open(dir, dentry, nd);
-        unlock_kernel();
         if (IS_ERR(res)) {
                 error = PTR_ERR(res);
                 switch (error) {
@@ -1063,9 +1067,7 @@ static int nfs_open_revalidate(struct dentry *dentry, struct nameidata *nd)
          * operations that change the directory. We therefore save the
          * change attribute *before* we do the RPC call.
          */
-        lock_kernel();
         ret = nfs4_open_revalidate(dir, dentry, openflags, nd);
-        unlock_kernel();
 out:
         dput(parent);
         if (!ret)
@@ -1218,14 +1220,11 @@ static int nfs_create(struct inode *dir, struct dentry *dentry, int mode,
         if ((nd->flags & LOOKUP_CREATE) != 0)
                 open_flags = nd->intent.open.flags;
 
-        lock_kernel();
         error = NFS_PROTO(dir)->create(dir, dentry, &attr, open_flags, nd);
         if (error != 0)
                 goto out_err;
-        unlock_kernel();
         return 0;
 out_err:
-        unlock_kernel();
         d_drop(dentry);
         return error;
 }
@@ -1248,14 +1247,11 @@ nfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev)
         attr.ia_mode = mode;
         attr.ia_valid = ATTR_MODE;
 
-        lock_kernel();
         status = NFS_PROTO(dir)->mknod(dir, dentry, &attr, rdev);
         if (status != 0)
                 goto out_err;
-        unlock_kernel();
         return 0;
 out_err:
-        unlock_kernel();
         d_drop(dentry);
         return status;
 }
@@ -1274,15 +1270,12 @@ static int nfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
         attr.ia_valid = ATTR_MODE;
         attr.ia_mode = mode | S_IFDIR;
 
-        lock_kernel();
         error = NFS_PROTO(dir)->mkdir(dir, dentry, &attr);
         if (error != 0)
                 goto out_err;
-        unlock_kernel();
         return 0;
 out_err:
         d_drop(dentry);
-        unlock_kernel();
         return error;
 }
 
@@ -1299,14 +1292,12 @@ static int nfs_rmdir(struct inode *dir, struct dentry *dentry)
         dfprintk(VFS, "NFS: rmdir(%s/%ld), %s\n",
                         dir->i_sb->s_id, dir->i_ino, dentry->d_name.name);
 
-        lock_kernel();
         error = NFS_PROTO(dir)->rmdir(dir, &dentry->d_name);
         /* Ensure the VFS deletes this inode */
         if (error == 0 && dentry->d_inode != NULL)
                 clear_nlink(dentry->d_inode);
         else if (error == -ENOENT)
                 nfs_dentry_handle_enoent(dentry);
-        unlock_kernel();
 
         return error;
 }
@@ -1408,7 +1399,7 @@ static int nfs_safe_remove(struct dentry *dentry)
                 error = NFS_PROTO(dir)->remove(dir, &dentry->d_name);
                 /* The VFS may want to delete this inode */
                 if (error == 0)
-                        drop_nlink(inode);
+                        nfs_drop_nlink(inode);
                 nfs_mark_for_revalidate(inode);
         } else
                 error = NFS_PROTO(dir)->remove(dir, &dentry->d_name);
@@ -1431,7 +1422,6 @@ static int nfs_unlink(struct inode *dir, struct dentry *dentry)
         dfprintk(VFS, "NFS: unlink(%s/%ld, %s)\n", dir->i_sb->s_id,
                 dir->i_ino, dentry->d_name.name);
 
-        lock_kernel();
         spin_lock(&dcache_lock);
         spin_lock(&dentry->d_lock);
         if (atomic_read(&dentry->d_count) > 1) {
@@ -1440,7 +1430,6 @@ static int nfs_unlink(struct inode *dir, struct dentry *dentry)
                 /* Start asynchronous writeout of the inode */
                 write_inode_now(dentry->d_inode, 0);
                 error = nfs_sillyrename(dir, dentry);
-                unlock_kernel();
                 return error;
         }
         if (!d_unhashed(dentry)) {
@@ -1454,7 +1443,6 @@ static int nfs_unlink(struct inode *dir, struct dentry *dentry)
                 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
         } else if (need_rehash)
                 d_rehash(dentry);
-        unlock_kernel();
         return error;
 }
 
@@ -1491,13 +1479,9 @@ static int nfs_symlink(struct inode *dir, struct dentry *dentry, const char *sym
         attr.ia_mode = S_IFLNK | S_IRWXUGO;
         attr.ia_valid = ATTR_MODE;
 
-        lock_kernel();
-
         page = alloc_page(GFP_HIGHUSER);
-        if (!page) {
-                unlock_kernel();
+        if (!page)
                 return -ENOMEM;
-        }
 
         kaddr = kmap_atomic(page, KM_USER0);
         memcpy(kaddr, symname, pathlen);
@@ -1512,7 +1496,6 @@ static int nfs_symlink(struct inode *dir, struct dentry *dentry, const char *sym
                         dentry->d_name.name, symname, error);
                 d_drop(dentry);
                 __free_page(page);
-                unlock_kernel();
                 return error;
         }
 
@@ -1530,7 +1513,6 @@ static int nfs_symlink(struct inode *dir, struct dentry *dentry, const char *sym
         } else
                 __free_page(page);
 
-        unlock_kernel();
         return 0;
 }
 
@@ -1544,14 +1526,12 @@ nfs_link(struct dentry *old_dentry, struct inode *dir, struct dentry *dentry)
                 old_dentry->d_parent->d_name.name, old_dentry->d_name.name,
                 dentry->d_parent->d_name.name, dentry->d_name.name);
 
-        lock_kernel();
         d_drop(dentry);
         error = NFS_PROTO(dir)->link(inode, dir, &dentry->d_name);
         if (error == 0) {
                 atomic_inc(&inode->i_count);
                 d_add(dentry, inode);
         }
-        unlock_kernel();
         return error;
 }
 
@@ -1591,7 +1571,6 @@ static int nfs_rename(struct inode *old_dir, struct dentry *old_dentry,
          * To prevent any new references to the target during the rename,
          * we unhash the dentry and free the inode in advance.
          */
-        lock_kernel();
         if (!d_unhashed(new_dentry)) {
                 d_drop(new_dentry);
                 rehash = new_dentry;
@@ -1635,7 +1614,7 @@ static int nfs_rename(struct inode *old_dir, struct dentry *old_dentry,
                         /* dentry still busy? */
                         goto out;
         } else
-                drop_nlink(new_inode);
+                nfs_drop_nlink(new_inode);
 
 go_ahead:
         /*
@@ -1669,7 +1648,6 @@ out:
         /* new dentry created? */
         if (dentry)
                 dput(dentry);
-        unlock_kernel();
         return error;
 }
 
@@ -1962,8 +1940,6 @@ int nfs_permission(struct inode *inode, int mask, struct nameidata *nd)
         }
 
 force_lookup:
-        lock_kernel();
-
         if (!NFS_PROTO(inode)->access)
                 goto out_notsup;
 
@@ -1973,7 +1949,6 @@ force_lookup:
                 put_rpccred(cred);
         } else
                 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);
@@ -1982,7 +1957,6 @@ out_notsup:
         res = nfs_revalidate_inode(NFS_SERVER(inode), inode);
         if (res == 0)
                 res = generic_permission(inode, mask, NULL);
-        unlock_kernel();
         goto out;
 }
 
diff --git a/fs/nfs/direct.c b/fs/nfs/direct.c
index 4757a2b326a1..08f6b040d289 100644
--- a/fs/nfs/direct.c
+++ b/fs/nfs/direct.c
@@ -890,7 +890,7 @@ ssize_t nfs_file_direct_read(struct kiocb *iocb, const struct iovec *iov,
         count = iov_length(iov, nr_segs);
         nfs_add_stats(mapping->host, NFSIOS_DIRECTREADBYTES, count);
 
-        dprintk("nfs: direct read(%s/%s, %zd@%Ld)\n",
+        dfprintk(FILE, "NFS: direct read(%s/%s, %zd@%Ld)\n",
                 file->f_path.dentry->d_parent->d_name.name,
                 file->f_path.dentry->d_name.name,
                 count, (long long) pos);
@@ -947,7 +947,7 @@ ssize_t nfs_file_direct_write(struct kiocb *iocb, const struct iovec *iov,
         count = iov_length(iov, nr_segs);
         nfs_add_stats(mapping->host, NFSIOS_DIRECTWRITTENBYTES, count);
 
-        dfprintk(VFS, "nfs: direct write(%s/%s, %zd@%Ld)\n",
+        dfprintk(FILE, "NFS: direct write(%s/%s, %zd@%Ld)\n",
                 file->f_path.dentry->d_parent->d_name.name,
                 file->f_path.dentry->d_name.name,
                 count, (long long) pos);
diff --git a/fs/nfs/file.c b/fs/nfs/file.c
index 4e98a56a1777..78460657f5cb 100644
--- a/fs/nfs/file.c
+++ b/fs/nfs/file.c
@@ -50,7 +50,7 @@ static ssize_t nfs_file_read(struct kiocb *, const struct iovec *iov,
 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);
-static int  nfs_fsync(struct file *, struct dentry *dentry, int datasync);
+static int  nfs_file_fsync(struct file *, struct dentry *dentry, int datasync);
 static int nfs_check_flags(int flags);
 static int nfs_lock(struct file *filp, int cmd, struct file_lock *fl);
 static int nfs_flock(struct file *filp, int cmd, struct file_lock *fl);
@@ -72,7 +72,7 @@ const struct file_operations nfs_file_operations = {
         .open           = nfs_file_open,
         .flush          = nfs_file_flush,
         .release        = nfs_file_release,
-        .fsync          = nfs_fsync,
+        .fsync          = nfs_file_fsync,
         .lock           = nfs_lock,
         .flock          = nfs_flock,
         .splice_read    = nfs_file_splice_read,
@@ -119,25 +119,33 @@ nfs_file_open(struct inode *inode, struct file *filp)
 {
         int res;
 
+        dprintk("NFS: open file(%s/%s)\n",
+                        filp->f_path.dentry->d_parent->d_name.name,
+                        filp->f_path.dentry->d_name.name);
+
         res = nfs_check_flags(filp->f_flags);
         if (res)
                 return res;
 
         nfs_inc_stats(inode, NFSIOS_VFSOPEN);
-        lock_kernel();
-        res = NFS_PROTO(inode)->file_open(inode, filp);
-        unlock_kernel();
+        res = nfs_open(inode, filp);
         return res;
 }
 
 static int
 nfs_file_release(struct inode *inode, struct file *filp)
 {
+        struct dentry *dentry = filp->f_path.dentry;
+
+        dprintk("NFS: release(%s/%s)\n",
+                        dentry->d_parent->d_name.name,
+                        dentry->d_name.name);
+
         /* Ensure that dirty pages are flushed out with the right creds */
         if (filp->f_mode & FMODE_WRITE)
-                nfs_wb_all(filp->f_path.dentry->d_inode);
+                nfs_wb_all(dentry->d_inode);
         nfs_inc_stats(inode, NFSIOS_VFSRELEASE);
-        return NFS_PROTO(inode)->file_release(inode, filp);
+        return nfs_release(inode, filp);
 }
 
 /**
@@ -171,6 +179,12 @@ force_reval:
 static loff_t nfs_file_llseek(struct file *filp, loff_t offset, int origin)
 {
         loff_t loff;
+
+        dprintk("NFS: llseek file(%s/%s, %lld, %d)\n",
+                        filp->f_path.dentry->d_parent->d_name.name,
+                        filp->f_path.dentry->d_name.name,
+                        offset, origin);
+
         /* origin == SEEK_END => we must revalidate the cached file length */
         if (origin == SEEK_END) {
                 struct inode *inode = filp->f_mapping->host;
@@ -185,7 +199,7 @@ static loff_t nfs_file_llseek(struct file *filp, loff_t offset, int origin)
 }
 
 /*
- * Helper for nfs_file_flush() and nfs_fsync()
+ * Helper for nfs_file_flush() and nfs_file_fsync()
  *
  * Notice that it clears the NFS_CONTEXT_ERROR_WRITE before synching to
  * disk, but it retrieves and clears ctx->error after synching, despite
@@ -211,16 +225,18 @@ static int nfs_do_fsync(struct nfs_open_context *ctx, struct inode *inode)
 
 /*
  * Flush all dirty pages, and check for write errors.
- *
  */
 static int
 nfs_file_flush(struct file *file, fl_owner_t id)
 {
         struct nfs_open_context *ctx = nfs_file_open_context(file);
-        struct inode    *inode = file->f_path.dentry->d_inode;
+        struct dentry   *dentry = file->f_path.dentry;
+        struct inode    *inode = dentry->d_inode;
         int             status;
 
-        dfprintk(VFS, "nfs: flush(%s/%ld)\n", inode->i_sb->s_id, inode->i_ino);
+        dprintk("NFS: flush(%s/%s)\n",
+                        dentry->d_parent->d_name.name,
+                        dentry->d_name.name);
 
         if ((file->f_mode & FMODE_WRITE) == 0)
                 return 0;
@@ -245,7 +261,7 @@ nfs_file_read(struct kiocb *iocb, const struct iovec *iov,
         if (iocb->ki_filp->f_flags & O_DIRECT)
                 return nfs_file_direct_read(iocb, iov, nr_segs, pos);
 
-        dfprintk(VFS, "nfs: read(%s/%s, %lu@%lu)\n",
+        dprintk("NFS: read(%s/%s, %lu@%lu)\n",
                 dentry->d_parent->d_name.name, dentry->d_name.name,
                 (unsigned long) count, (unsigned long) pos);
 
@@ -265,7 +281,7 @@ nfs_file_splice_read(struct file *filp, loff_t *ppos,
         struct inode *inode = dentry->d_inode;
         ssize_t res;
 
-        dfprintk(VFS, "nfs: splice_read(%s/%s, %lu@%Lu)\n",
+        dprintk("NFS: splice_read(%s/%s, %lu@%Lu)\n",
                 dentry->d_parent->d_name.name, dentry->d_name.name,
                 (unsigned long) count, (unsigned long long) *ppos);
 
@@ -282,7 +298,7 @@ nfs_file_mmap(struct file * file, struct vm_area_struct * vma)
         struct inode *inode = dentry->d_inode;
         int     status;
 
-        dfprintk(VFS, "nfs: mmap(%s/%s)\n",
+        dprintk("NFS: mmap(%s/%s)\n",
                 dentry->d_parent->d_name.name, dentry->d_name.name);
 
         status = nfs_revalidate_mapping(inode, file->f_mapping);
@@ -300,12 +316,14 @@ nfs_file_mmap(struct file * file, struct vm_area_struct * vma)
  * whether any write errors occurred for this process.
  */
 static int
-nfs_fsync(struct file *file, struct dentry *dentry, int datasync)
+nfs_file_fsync(struct file *file, struct dentry *dentry, int datasync)
 {
         struct nfs_open_context *ctx = nfs_file_open_context(file);
         struct inode *inode = dentry->d_inode;
 
-        dfprintk(VFS, "nfs: fsync(%s/%ld)\n", inode->i_sb->s_id, inode->i_ino);
+        dprintk("NFS: fsync file(%s/%s) datasync %d\n",
+                        dentry->d_parent->d_name.name, dentry->d_name.name,
+                        datasync);
 
         nfs_inc_stats(inode, NFSIOS_VFSFSYNC);
         return nfs_do_fsync(ctx, inode);
@@ -328,6 +346,11 @@ static int nfs_write_begin(struct file *file, struct address_space *mapping,
         struct page *page;
         index = pos >> PAGE_CACHE_SHIFT;
 
+        dfprintk(PAGECACHE, "NFS: write_begin(%s/%s(%ld), %u@%lld)\n",
+                file->f_path.dentry->d_parent->d_name.name,
+                file->f_path.dentry->d_name.name,
+                mapping->host->i_ino, len, (long long) pos);
+
         page = __grab_cache_page(mapping, index);
         if (!page)
                 return -ENOMEM;
@@ -348,9 +371,32 @@ static int nfs_write_end(struct file *file, struct address_space *mapping,
         unsigned offset = pos & (PAGE_CACHE_SIZE - 1);
         int status;
 
-        lock_kernel();
+        dfprintk(PAGECACHE, "NFS: write_end(%s/%s(%ld), %u@%lld)\n",
+                file->f_path.dentry->d_parent->d_name.name,
+                file->f_path.dentry->d_name.name,
+                mapping->host->i_ino, len, (long long) pos);
+
+        /*
+         * Zero any uninitialised parts of the page, and then mark the page
+         * as up to date if it turns out that we're extending the file.
+         */
+        if (!PageUptodate(page)) {
+                unsigned pglen = nfs_page_length(page);
+                unsigned end = offset + len;
+
+                if (pglen == 0) {
+                        zero_user_segments(page, 0, offset,
+                                        end, PAGE_CACHE_SIZE);
+                        SetPageUptodate(page);
+                } else if (end >= pglen) {
+                        zero_user_segment(page, end, PAGE_CACHE_SIZE);
+                        if (offset == 0)
+                                SetPageUptodate(page);
+                } else
+                        zero_user_segment(page, pglen, PAGE_CACHE_SIZE);
+        }
+
         status = nfs_updatepage(file, page, offset, copied);
-        unlock_kernel();
 
         unlock_page(page);
         page_cache_release(page);
@@ -362,6 +408,8 @@ static int nfs_write_end(struct file *file, struct address_space *mapping,
 
 static void nfs_invalidate_page(struct page *page, unsigned long offset)
 {
+        dfprintk(PAGECACHE, "NFS: invalidate_page(%p, %lu)\n", page, offset);
+
         if (offset != 0)
                 return;
         /* Cancel any unstarted writes on this page */
@@ -370,13 +418,20 @@ static void nfs_invalidate_page(struct page *page, unsigned long offset)
 
 static int nfs_release_page(struct page *page, gfp_t gfp)
 {
+        dfprintk(PAGECACHE, "NFS: release_page(%p)\n", page);
+
         /* If PagePrivate() is set, then the page is not freeable */
         return 0;
 }
 
 static int nfs_launder_page(struct page *page)
 {
-        return nfs_wb_page(page->mapping->host, page);
+        struct inode *inode = page->mapping->host;
+
+        dfprintk(PAGECACHE, "NFS: launder_page(%ld, %llu)\n",
+                inode->i_ino, (long long)page_offset(page));
+
+        return nfs_wb_page(inode, page);
 }
 
 const struct address_space_operations nfs_file_aops = {
@@ -396,13 +451,19 @@ const struct address_space_operations nfs_file_aops = {
 static int nfs_vm_page_mkwrite(struct vm_area_struct *vma, struct page *page)
 {
         struct file *filp = vma->vm_file;
+        struct dentry *dentry = filp->f_path.dentry;
         unsigned pagelen;
         int ret = -EINVAL;
         struct address_space *mapping;
 
+        dfprintk(PAGECACHE, "NFS: vm_page_mkwrite(%s/%s(%ld), offset %lld)\n",
+                dentry->d_parent->d_name.name, dentry->d_name.name,
+                filp->f_mapping->host->i_ino,
+                (long long)page_offset(page));
+
         lock_page(page);
         mapping = page->mapping;
-        if (mapping != vma->vm_file->f_path.dentry->d_inode->i_mapping)
+        if (mapping != dentry->d_inode->i_mapping)
                 goto out_unlock;
 
         ret = 0;
@@ -450,9 +511,9 @@ static ssize_t nfs_file_write(struct kiocb *iocb, const struct iovec *iov,
         if (iocb->ki_filp->f_flags & O_DIRECT)
                 return nfs_file_direct_write(iocb, iov, nr_segs, pos);
 
-        dfprintk(VFS, "nfs: write(%s/%s(%ld), %lu@%Ld)\n",
+        dprintk("NFS: write(%s/%s, %lu@%Ld)\n",
                 dentry->d_parent->d_name.name, dentry->d_name.name,
-                inode->i_ino, (unsigned long) count, (long long) pos);
+                (unsigned long) count, (long long) pos);
 
         result = -EBUSY;
         if (IS_SWAPFILE(inode))
@@ -586,7 +647,8 @@ static int do_setlk(struct file *filp, int cmd, struct file_lock *fl)
          * This makes locking act as a cache coherency point.
          */
         nfs_sync_mapping(filp->f_mapping);
-        nfs_zap_caches(inode);
+        if (!nfs_have_delegation(inode, FMODE_READ))
+                nfs_zap_caches(inode);
 out:
         return status;
 }
@@ -596,23 +658,35 @@ out:
  */
 static int nfs_lock(struct file *filp, int cmd, struct file_lock *fl)
 {
-        struct inode * inode = filp->f_mapping->host;
+        struct inode *inode = filp->f_mapping->host;
+        int ret = -ENOLCK;
 
-        dprintk("NFS: nfs_lock(f=%s/%ld, t=%x, fl=%x, r=%Ld:%Ld)\n",
-                        inode->i_sb->s_id, inode->i_ino,
+        dprintk("NFS: lock(%s/%s, t=%x, fl=%x, r=%lld:%lld)\n",
+                        filp->f_path.dentry->d_parent->d_name.name,
+                        filp->f_path.dentry->d_name.name,
                         fl->fl_type, fl->fl_flags,
                         (long long)fl->fl_start, (long long)fl->fl_end);
+
         nfs_inc_stats(inode, NFSIOS_VFSLOCK);
 
         /* No mandatory locks over NFS */
         if (__mandatory_lock(inode) && fl->fl_type != F_UNLCK)
-                return -ENOLCK;
+                goto out_err;
+
+        if (NFS_PROTO(inode)->lock_check_bounds != NULL) {
+                ret = NFS_PROTO(inode)->lock_check_bounds(fl);
+                if (ret < 0)
+                        goto out_err;
+        }
 
         if (IS_GETLK(cmd))
-                return do_getlk(filp, cmd, fl);
-        if (fl->fl_type == F_UNLCK)
-                return do_unlk(filp, cmd, fl);
-        return do_setlk(filp, cmd, fl);
+                ret = do_getlk(filp, cmd, fl);
+        else if (fl->fl_type == F_UNLCK)
+                ret = do_unlk(filp, cmd, fl);
+        else
+                ret = do_setlk(filp, cmd, fl);
+out_err:
+        return ret;
 }
 
 /*
@@ -620,9 +694,9 @@ static int nfs_lock(struct file *filp, int cmd, struct file_lock *fl)
  */
 static int nfs_flock(struct file *filp, int cmd, struct file_lock *fl)
 {
-        dprintk("NFS: nfs_flock(f=%s/%ld, t=%x, fl=%x)\n",
-                        filp->f_path.dentry->d_inode->i_sb->s_id,
-                        filp->f_path.dentry->d_inode->i_ino,
+        dprintk("NFS: flock(%s/%s, t=%x, fl=%x)\n",
+                        filp->f_path.dentry->d_parent->d_name.name,
+                        filp->f_path.dentry->d_name.name,
                         fl->fl_type, fl->fl_flags);
 
         /*
@@ -645,12 +719,15 @@ static int nfs_flock(struct file *filp, int cmd, struct file_lock *fl)
         return do_setlk(filp, cmd, fl);
 }
 
+/*
+ * There is no protocol support for leases, so we have no way to implement
+ * them correctly in the face of opens by other clients.
+ */
 static int nfs_setlease(struct file *file, long arg, struct file_lock **fl)
 {
-        /*
-         * There is no protocol support for leases, so we have no way
-         * to implement them correctly in the face of opens by other
-         * clients.
-         */
+        dprintk("NFS: setlease(%s/%s, arg=%ld)\n",
+                        file->f_path.dentry->d_parent->d_name.name,
+                        file->f_path.dentry->d_name.name, arg);
+
         return -EINVAL;
 }
diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index 596c5d8e86f4..df23f987da6b 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -57,8 +57,6 @@ static int enable_ino64 = NFS_64_BIT_INODE_NUMBERS_ENABLED;
 static void nfs_invalidate_inode(struct inode *);
 static int nfs_update_inode(struct inode *, struct nfs_fattr *);
 
-static void nfs_zap_acl_cache(struct inode *);
-
 static struct kmem_cache * nfs_inode_cachep;
 
 static inline unsigned long
@@ -167,7 +165,7 @@ void nfs_zap_mapping(struct inode *inode, struct address_space *mapping)
         }
 }
 
-static void nfs_zap_acl_cache(struct inode *inode)
+void nfs_zap_acl_cache(struct inode *inode)
 {
         void (*clear_acl_cache)(struct inode *);
 
@@ -347,7 +345,7 @@ out_no_inode:
         goto out;
 }
 
-#define NFS_VALID_ATTRS (ATTR_MODE|ATTR_UID|ATTR_GID|ATTR_SIZE|ATTR_ATIME|ATTR_ATIME_SET|ATTR_MTIME|ATTR_MTIME_SET)
+#define NFS_VALID_ATTRS (ATTR_MODE|ATTR_UID|ATTR_GID|ATTR_SIZE|ATTR_ATIME|ATTR_ATIME_SET|ATTR_MTIME|ATTR_MTIME_SET|ATTR_FILE)
 
 int
 nfs_setattr(struct dentry *dentry, struct iattr *attr)
@@ -369,10 +367,9 @@ nfs_setattr(struct dentry *dentry, struct iattr *attr)
 
         /* Optimization: if the end result is no change, don't RPC */
         attr->ia_valid &= NFS_VALID_ATTRS;
-        if (attr->ia_valid == 0)
+        if ((attr->ia_valid & ~ATTR_FILE) == 0)
                 return 0;
 
-        lock_kernel();
         /* Write all dirty data */
         if (S_ISREG(inode->i_mode)) {
                 filemap_write_and_wait(inode->i_mapping);
@@ -386,11 +383,66 @@ nfs_setattr(struct dentry *dentry, struct iattr *attr)
         error = NFS_PROTO(inode)->setattr(dentry, &fattr, attr);
         if (error == 0)
                 nfs_refresh_inode(inode, &fattr);
-        unlock_kernel();
         return error;
 }
 
 /**
+ * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall
+ * @inode: inode of the file used
+ * @offset: file offset to start truncating
+ *
+ * This is a copy of the common vmtruncate, but with the locking
+ * corrected to take into account the fact that NFS requires
+ * inode->i_size to be updated under the inode->i_lock.
+ */
+static int nfs_vmtruncate(struct inode * inode, loff_t offset)
+{
+        if (i_size_read(inode) < offset) {
+                unsigned long limit;
+
+                limit = current->signal->rlim[RLIMIT_FSIZE].rlim_cur;
+                if (limit != RLIM_INFINITY && offset > limit)
+                        goto out_sig;
+                if (offset > inode->i_sb->s_maxbytes)
+                        goto out_big;
+                spin_lock(&inode->i_lock);
+                i_size_write(inode, offset);
+                spin_unlock(&inode->i_lock);
+        } else {
+                struct address_space *mapping = inode->i_mapping;
+
+                /*
+                 * truncation of in-use swapfiles is disallowed - it would
+                 * cause subsequent swapout to scribble on the now-freed
+                 * blocks.
+                 */
+                if (IS_SWAPFILE(inode))
+                        return -ETXTBSY;
+                spin_lock(&inode->i_lock);
+                i_size_write(inode, offset);
+                spin_unlock(&inode->i_lock);
+
+                /*
+                 * unmap_mapping_range is called twice, first simply for
+                 * efficiency so that truncate_inode_pages does fewer
+                 * single-page unmaps.  However after this first call, and
+                 * before truncate_inode_pages finishes, it is possible for
+                 * private pages to be COWed, which remain after
+                 * truncate_inode_pages finishes, hence the second
+                 * unmap_mapping_range call must be made for correctness.
+                 */
+                unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1);
+                truncate_inode_pages(mapping, offset);
+                unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1);
+        }
+        return 0;
+out_sig:
+        send_sig(SIGXFSZ, current, 0);
+out_big:
+        return -EFBIG;
+}
+
+/**
  * nfs_setattr_update_inode - Update inode metadata after a setattr call.
  * @inode: pointer to struct inode
  * @attr: pointer to struct iattr
@@ -416,8 +468,7 @@ void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr)
         }
         if ((attr->ia_valid & ATTR_SIZE) != 0) {
                 nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC);
-                inode->i_size = attr->ia_size;
-                vmtruncate(inode, attr->ia_size);
+                nfs_vmtruncate(inode, attr->ia_size);
         }
 }
 
@@ -647,7 +698,6 @@ __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
                 inode->i_sb->s_id, (long long)NFS_FILEID(inode));
 
         nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE);
-        lock_kernel();
         if (is_bad_inode(inode))
                 goto out_nowait;
         if (NFS_STALE(inode))
@@ -696,7 +746,6 @@ __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
         nfs_wake_up_inode(inode);
 
  out_nowait:
-        unlock_kernel();
         return status;
 }
 
@@ -831,9 +880,9 @@ static void nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr)
                         if (S_ISDIR(inode->i_mode))
                                 nfsi->cache_validity |= NFS_INO_INVALID_DATA;
                 }
-                if (inode->i_size == nfs_size_to_loff_t(fattr->pre_size) &&
+                if (i_size_read(inode) == nfs_size_to_loff_t(fattr->pre_size) &&
                     nfsi->npages == 0)
-                        inode->i_size = nfs_size_to_loff_t(fattr->size);
+                        i_size_write(inode, nfs_size_to_loff_t(fattr->size));
         }
 }
 
@@ -974,7 +1023,7 @@ int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fa
                         (fattr->valid & NFS_ATTR_WCC) == 0) {
                 memcpy(&fattr->pre_ctime, &inode->i_ctime, sizeof(fattr->pre_ctime));
                 memcpy(&fattr->pre_mtime, &inode->i_mtime, sizeof(fattr->pre_mtime));
-                fattr->pre_size = inode->i_size;
+                fattr->pre_size = i_size_read(inode);
                 fattr->valid |= NFS_ATTR_WCC;
         }
         return nfs_post_op_update_inode(inode, fattr);
@@ -1059,7 +1108,7 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
                 /* Do we perhaps have any outstanding writes, or has
                  * the file grown beyond our last write? */
                 if (nfsi->npages == 0 || new_isize > cur_isize) {
-                        inode->i_size = new_isize;
+                        i_size_write(inode, new_isize);
                         invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
                 }
                 dprintk("NFS: isize change on server for file %s/%ld\n",
diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h
index 04ae867dddba..24241fcbb98d 100644
--- a/fs/nfs/internal.h
+++ b/fs/nfs/internal.h
@@ -150,6 +150,7 @@ extern void nfs_clear_inode(struct inode *);
 #ifdef CONFIG_NFS_V4
 extern void nfs4_clear_inode(struct inode *);
 #endif
+void nfs_zap_acl_cache(struct inode *inode);
 
 /* super.c */
 extern struct file_system_type nfs_xdev_fs_type;
diff --git a/fs/nfs/iostat.h b/fs/nfs/iostat.h
index 6350ecbde589..a36952810032 100644
--- a/fs/nfs/iostat.h
+++ b/fs/nfs/iostat.h
@@ -5,135 +5,41 @@
  *
  *  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>
+#include <linux/nfs_iostat.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)
+static inline void nfs_inc_server_stats(const 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] ++;
+        iostats->events[stat]++;
         put_cpu_no_resched();
 }
 
-static inline void nfs_inc_stats(struct inode *inode, enum nfs_stat_eventcounters stat)
+static inline void nfs_inc_stats(const 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)
+static inline void nfs_add_server_stats(const struct nfs_server *server,
+                                        enum nfs_stat_bytecounters stat,
+                                        unsigned long addend)
 {
         struct nfs_iostats *iostats;
         int cpu;
@@ -144,7 +50,9 @@ static inline void nfs_add_server_stats(struct nfs_server *server, enum nfs_stat
         put_cpu_no_resched();
 }
 
-static inline void nfs_add_stats(struct inode *inode, enum nfs_stat_bytecounters stat, unsigned long addend)
+static inline void nfs_add_stats(const struct inode *inode,
+                                 enum nfs_stat_bytecounters stat,
+                                 unsigned long addend)
 {
         nfs_add_server_stats(NFS_SERVER(inode), stat, addend);
 }
@@ -160,5 +68,4 @@ static inline void nfs_free_iostats(struct nfs_iostats *stats)
                 free_percpu(stats);
 }
 
-#endif
-#endif
+#endif /* _NFS_IOSTAT */
diff --git a/fs/nfs/nfs3acl.c b/fs/nfs/nfs3acl.c
index 9b7362565c0c..423842f51ac9 100644
--- a/fs/nfs/nfs3acl.c
+++ b/fs/nfs/nfs3acl.c
@@ -5,6 +5,8 @@
 #include <linux/posix_acl_xattr.h>
 #include <linux/nfsacl.h>
 
+#include "internal.h"
+
 #define NFSDBG_FACILITY NFSDBG_PROC
 
 ssize_t nfs3_listxattr(struct dentry *dentry, char *buffer, size_t size)
@@ -205,6 +207,8 @@ 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;
@@ -319,9 +323,8 @@ static int nfs3_proc_setacls(struct inode *inode, struct posix_acl *acl,
         dprintk("NFS call setacl\n");
         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);
+        nfs_access_zap_cache(inode);
+        nfs_zap_acl_cache(inode);
         dprintk("NFS reply setacl: %d\n", status);
 
         /* pages may have been allocated at the xdr layer. */
diff --git a/fs/nfs/nfs3proc.c b/fs/nfs/nfs3proc.c
index c3523ad03ed1..1e750e4574a9 100644
--- a/fs/nfs/nfs3proc.c
+++ b/fs/nfs/nfs3proc.c
@@ -129,6 +129,8 @@ nfs3_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
         int     status;
 
         dprintk("NFS call  setattr\n");
+        if (sattr->ia_valid & ATTR_FILE)
+                msg.rpc_cred = nfs_file_cred(sattr->ia_file);
         nfs_fattr_init(fattr);
         status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
         if (status == 0)
@@ -248,6 +250,53 @@ static int nfs3_proc_readlink(struct inode *inode, struct page *page,
         return status;
 }
 
+struct nfs3_createdata {
+        struct rpc_message msg;
+        union {
+                struct nfs3_createargs create;
+                struct nfs3_mkdirargs mkdir;
+                struct nfs3_symlinkargs symlink;
+                struct nfs3_mknodargs mknod;
+        } arg;
+        struct nfs3_diropres res;
+        struct nfs_fh fh;
+        struct nfs_fattr fattr;
+        struct nfs_fattr dir_attr;
+};
+
+static struct nfs3_createdata *nfs3_alloc_createdata(void)
+{
+        struct nfs3_createdata *data;
+
+        data = kzalloc(sizeof(*data), GFP_KERNEL);
+        if (data != NULL) {
+                data->msg.rpc_argp = &data->arg;
+                data->msg.rpc_resp = &data->res;
+                data->res.fh = &data->fh;
+                data->res.fattr = &data->fattr;
+                data->res.dir_attr = &data->dir_attr;
+                nfs_fattr_init(data->res.fattr);
+                nfs_fattr_init(data->res.dir_attr);
+        }
+        return data;
+}
+
+static int nfs3_do_create(struct inode *dir, struct dentry *dentry, struct nfs3_createdata *data)
+{
+        int status;
+
+        status = rpc_call_sync(NFS_CLIENT(dir), &data->msg, 0);
+        nfs_post_op_update_inode(dir, data->res.dir_attr);
+        if (status == 0)
+                status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
+        return status;
+}
+
+static void nfs3_free_createdata(struct nfs3_createdata *data)
+{
+        kfree(data);
+}
+
 /*
  * Create a regular file.
  * For now, we don't implement O_EXCL.
@@ -256,70 +305,60 @@ static int
 nfs3_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
                  int flags, struct nameidata *nd)
 {
-        struct nfs_fh           fhandle;
-        struct nfs_fattr        fattr;
-        struct nfs_fattr        dir_attr;
-        struct nfs3_createargs  arg = {
-                .fh             = NFS_FH(dir),
-                .name           = dentry->d_name.name,
-                .len            = dentry->d_name.len,
-                .sattr          = sattr,
-        };
-        struct nfs3_diropres    res = {
-                .dir_attr       = &dir_attr,
-                .fh             = &fhandle,
-                .fattr          = &fattr
-        };
-        struct rpc_message msg = {
-                .rpc_proc       = &nfs3_procedures[NFS3PROC_CREATE],
-                .rpc_argp       = &arg,
-                .rpc_resp       = &res,
-        };
+        struct nfs3_createdata *data;
         mode_t mode = sattr->ia_mode;
-        int status;
+        int status = -ENOMEM;
 
         dprintk("NFS call  create %s\n", dentry->d_name.name);
-        arg.createmode = NFS3_CREATE_UNCHECKED;
+
+        data = nfs3_alloc_createdata();
+        if (data == NULL)
+                goto out;
+
+        data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_CREATE];
+        data->arg.create.fh = NFS_FH(dir);
+        data->arg.create.name = dentry->d_name.name;
+        data->arg.create.len = dentry->d_name.len;
+        data->arg.create.sattr = sattr;
+
+        data->arg.create.createmode = NFS3_CREATE_UNCHECKED;
         if (flags & O_EXCL) {
-                arg.createmode  = NFS3_CREATE_EXCLUSIVE;
-                arg.verifier[0] = jiffies;
-                arg.verifier[1] = current->pid;
+                data->arg.create.createmode  = NFS3_CREATE_EXCLUSIVE;
+                data->arg.create.verifier[0] = jiffies;
+                data->arg.create.verifier[1] = current->pid;
         }
 
         sattr->ia_mode &= ~current->fs->umask;
 
-again:
-        nfs_fattr_init(&dir_attr);
-        nfs_fattr_init(&fattr);
-        status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
-        nfs_refresh_inode(dir, &dir_attr);
+        for (;;) {
+                status = nfs3_do_create(dir, dentry, data);
 
-        /* If the server doesn't support the exclusive creation semantics,
-         * try again with simple 'guarded' mode. */
-        if (status == -ENOTSUPP) {
-                switch (arg.createmode) {
+                if (status != -ENOTSUPP)
+                        break;
+                /* If the server doesn't support the exclusive creation
+                 * semantics, try again with simple 'guarded' mode. */
+                switch (data->arg.create.createmode) {
                         case NFS3_CREATE_EXCLUSIVE:
-                                arg.createmode = NFS3_CREATE_GUARDED;
+                                data->arg.create.createmode = NFS3_CREATE_GUARDED;
                                 break;
 
                         case NFS3_CREATE_GUARDED:
-                                arg.createmode = NFS3_CREATE_UNCHECKED;
+                                data->arg.create.createmode = NFS3_CREATE_UNCHECKED;
                                 break;
 
                         case NFS3_CREATE_UNCHECKED:
                                 goto out;
                 }
-                goto again;
+                nfs_fattr_init(data->res.dir_attr);
+                nfs_fattr_init(data->res.fattr);
         }
 
-        if (status == 0)
-                status = nfs_instantiate(dentry, &fhandle, &fattr);
         if (status != 0)
                 goto out;
 
         /* When we created the file with exclusive semantics, make
          * sure we set the attributes afterwards. */
-        if (arg.createmode == NFS3_CREATE_EXCLUSIVE) {
+        if (data->arg.create.createmode == NFS3_CREATE_EXCLUSIVE) {
                 dprintk("NFS call  setattr (post-create)\n");
 
                 if (!(sattr->ia_valid & ATTR_ATIME_SET))
@@ -330,14 +369,15 @@ again:
                 /* Note: we could use a guarded setattr here, but I'm
                  * not sure this buys us anything (and I'd have
                  * to revamp the NFSv3 XDR code) */
-                status = nfs3_proc_setattr(dentry, &fattr, sattr);
-                nfs_post_op_update_inode(dentry->d_inode, &fattr);
+                status = nfs3_proc_setattr(dentry, data->res.fattr, sattr);
+                nfs_post_op_update_inode(dentry->d_inode, data->res.fattr);
                 dprintk("NFS reply setattr (post-create): %d\n", status);
+                if (status != 0)
+                        goto out;
         }
-        if (status != 0)
-                goto out;
         status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode);
 out:
+        nfs3_free_createdata(data);
         dprintk("NFS reply create: %d\n", status);
         return status;
 }
@@ -452,40 +492,28 @@ static int
 nfs3_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page,
                   unsigned int len, struct iattr *sattr)
 {
-        struct nfs_fh fhandle;
-        struct nfs_fattr fattr, dir_attr;
-        struct nfs3_symlinkargs arg = {
-                .fromfh         = NFS_FH(dir),
-                .fromname       = dentry->d_name.name,
-                .fromlen        = dentry->d_name.len,
-                .pages          = &page,
-                .pathlen        = len,
-                .sattr          = sattr
-        };
-        struct nfs3_diropres    res = {
-                .dir_attr       = &dir_attr,
-                .fh             = &fhandle,
-                .fattr          = &fattr
-        };
-        struct rpc_message msg = {
-                .rpc_proc       = &nfs3_procedures[NFS3PROC_SYMLINK],
-                .rpc_argp       = &arg,
-                .rpc_resp       = &res,
-        };
-        int                     status;
+        struct nfs3_createdata *data;
+        int status = -ENOMEM;
 
         if (len > NFS3_MAXPATHLEN)
                 return -ENAMETOOLONG;
 
         dprintk("NFS call  symlink %s\n", dentry->d_name.name);
 
-        nfs_fattr_init(&dir_attr);
-        nfs_fattr_init(&fattr);
-        status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
-        nfs_post_op_update_inode(dir, &dir_attr);
-        if (status != 0)
+        data = nfs3_alloc_createdata();
+        if (data == NULL)
                 goto out;
-        status = nfs_instantiate(dentry, &fhandle, &fattr);
+        data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_SYMLINK];
+        data->arg.symlink.fromfh = NFS_FH(dir);
+        data->arg.symlink.fromname = dentry->d_name.name;
+        data->arg.symlink.fromlen = dentry->d_name.len;
+        data->arg.symlink.pages = &page;
+        data->arg.symlink.pathlen = len;
+        data->arg.symlink.sattr = sattr;
+
+        status = nfs3_do_create(dir, dentry, data);
+
+        nfs3_free_createdata(data);
 out:
         dprintk("NFS reply symlink: %d\n", status);
         return status;
@@ -494,42 +522,31 @@ out:
 static int
 nfs3_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr)
 {
-        struct nfs_fh fhandle;
-        struct nfs_fattr fattr, dir_attr;
-        struct nfs3_mkdirargs   arg = {
-                .fh             = NFS_FH(dir),
-                .name           = dentry->d_name.name,
-                .len            = dentry->d_name.len,
-                .sattr          = sattr
-        };
-        struct nfs3_diropres    res = {
-                .dir_attr       = &dir_attr,
-                .fh             = &fhandle,
-                .fattr          = &fattr
-        };
-        struct rpc_message msg = {
-                .rpc_proc       = &nfs3_procedures[NFS3PROC_MKDIR],
-                .rpc_argp       = &arg,
-                .rpc_resp       = &res,
-        };
+        struct nfs3_createdata *data;
         int mode = sattr->ia_mode;
-        int status;
+        int status = -ENOMEM;
 
         dprintk("NFS call  mkdir %s\n", dentry->d_name.name);
 
         sattr->ia_mode &= ~current->fs->umask;
 
-        nfs_fattr_init(&dir_attr);
-        nfs_fattr_init(&fattr);
-        status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
-        nfs_post_op_update_inode(dir, &dir_attr);
-        if (status != 0)
+        data = nfs3_alloc_createdata();
+        if (data == NULL)
                 goto out;
-        status = nfs_instantiate(dentry, &fhandle, &fattr);
+
+        data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_MKDIR];
+        data->arg.mkdir.fh = NFS_FH(dir);
+        data->arg.mkdir.name = dentry->d_name.name;
+        data->arg.mkdir.len = dentry->d_name.len;
+        data->arg.mkdir.sattr = sattr;
+
+        status = nfs3_do_create(dir, dentry, data);
         if (status != 0)
                 goto out;
+
         status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode);
 out:
+        nfs3_free_createdata(data);
         dprintk("NFS reply mkdir: %d\n", status);
         return status;
 }
@@ -615,52 +632,50 @@ static int
 nfs3_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
                 dev_t rdev)
 {
-        struct nfs_fh fh;
-        struct nfs_fattr fattr, dir_attr;
-        struct nfs3_mknodargs   arg = {
-                .fh             = NFS_FH(dir),
-                .name           = dentry->d_name.name,
-                .len            = dentry->d_name.len,
-                .sattr          = sattr,
-                .rdev           = rdev
-        };
-        struct nfs3_diropres    res = {
-                .dir_attr       = &dir_attr,
-                .fh             = &fh,
-                .fattr          = &fattr
-        };
-        struct rpc_message msg = {
-                .rpc_proc       = &nfs3_procedures[NFS3PROC_MKNOD],
-                .rpc_argp       = &arg,
-                .rpc_resp       = &res,
-        };
+        struct nfs3_createdata *data;
         mode_t mode = sattr->ia_mode;
-        int status;
-
-        switch (sattr->ia_mode & S_IFMT) {
-        case S_IFBLK:   arg.type = NF3BLK;  break;
-        case S_IFCHR:   arg.type = NF3CHR;  break;
-        case S_IFIFO:   arg.type = NF3FIFO; break;
-        case S_IFSOCK:  arg.type = NF3SOCK; break;
-        default:        return -EINVAL;
-        }
+        int status = -ENOMEM;
 
         dprintk("NFS call  mknod %s %u:%u\n", dentry->d_name.name,
                         MAJOR(rdev), MINOR(rdev));
 
         sattr->ia_mode &= ~current->fs->umask;
 
-        nfs_fattr_init(&dir_attr);
-        nfs_fattr_init(&fattr);
-        status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
-        nfs_post_op_update_inode(dir, &dir_attr);
-        if (status != 0)
+        data = nfs3_alloc_createdata();
+        if (data == NULL)
                 goto out;
-        status = nfs_instantiate(dentry, &fh, &fattr);
+
+        data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_MKNOD];
+        data->arg.mknod.fh = NFS_FH(dir);
+        data->arg.mknod.name = dentry->d_name.name;
+        data->arg.mknod.len = dentry->d_name.len;
+        data->arg.mknod.sattr = sattr;
+        data->arg.mknod.rdev = rdev;
+
+        switch (sattr->ia_mode & S_IFMT) {
+        case S_IFBLK:
+                data->arg.mknod.type = NF3BLK;
+                break;
+        case S_IFCHR:
+                data->arg.mknod.type = NF3CHR;
+                break;
+        case S_IFIFO:
+                data->arg.mknod.type = NF3FIFO;
+                break;
+        case S_IFSOCK:
+                data->arg.mknod.type = NF3SOCK;
+                break;
+        default:
+                status = -EINVAL;
+                goto out;
+        }
+
+        status = nfs3_do_create(dir, dentry, data);
         if (status != 0)
                 goto out;
         status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode);
 out:
+        nfs3_free_createdata(data);
         dprintk("NFS reply mknod: %d\n", status);
         return status;
 }
@@ -801,8 +816,6 @@ const struct nfs_rpc_ops nfs_v3_clientops = {
         .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,
         .clear_acl_cache = nfs3_forget_cached_acls,
 };
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 1293e0acd82b..c910413eaeca 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -451,9 +451,7 @@ static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
                 /* Save the delegation */
                 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
                 rcu_read_unlock();
-                lock_kernel();
                 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
-                unlock_kernel();
                 if (ret != 0)
                         goto out;
                 ret = -EAGAIN;
@@ -1139,8 +1137,9 @@ static struct nfs4_state *nfs4_do_open(struct inode *dir, struct path *path, int
         return res;
 }
 
-static int _nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr,
-                struct iattr *sattr, struct nfs4_state *state)
+static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
+                            struct nfs_fattr *fattr, struct iattr *sattr,
+                            struct nfs4_state *state)
 {
         struct nfs_server *server = NFS_SERVER(inode);
         struct nfs_setattrargs  arg = {
@@ -1154,9 +1153,10 @@ static int _nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr,
                 .server         = server,
         };
         struct rpc_message msg = {
-                .rpc_proc       = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
-                .rpc_argp       = &arg,
-                .rpc_resp       = &res,
+                .rpc_proc       = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
+                .rpc_argp       = &arg,
+                .rpc_resp       = &res,
+                .rpc_cred       = cred,
         };
         unsigned long timestamp = jiffies;
         int status;
@@ -1166,7 +1166,6 @@ static int _nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr,
         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
                 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
@@ -1177,15 +1176,16 @@ static int _nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr,
         return status;
 }
 
-static int nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr,
-                struct iattr *sattr, struct nfs4_state *state)
+static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
+                           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(inode, fattr, sattr, state),
+                                _nfs4_do_setattr(inode, cred, fattr, sattr, state),
                                 &exception);
         } while (exception.retry);
         return err;
@@ -1647,29 +1647,25 @@ static int
 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
                   struct iattr *sattr)
 {
-        struct rpc_cred *cred;
         struct inode *inode = dentry->d_inode;
-        struct nfs_open_context *ctx;
+        struct rpc_cred *cred = NULL;
         struct nfs4_state *state = NULL;
         int status;
 
         nfs_fattr_init(fattr);
         
-        cred = rpc_lookup_cred();
-        if (IS_ERR(cred))
-                return PTR_ERR(cred);
-
         /* Search for an existing open(O_WRITE) file */
-        ctx = nfs_find_open_context(inode, cred, FMODE_WRITE);
-        if (ctx != NULL)
+        if (sattr->ia_valid & ATTR_FILE) {
+                struct nfs_open_context *ctx;
+
+                ctx = nfs_file_open_context(sattr->ia_file);
+                cred = ctx->cred;
                 state = ctx->state;
+        }
 
-        status = nfs4_do_setattr(inode, fattr, sattr, state);
+        status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
         if (status == 0)
                 nfs_setattr_update_inode(inode, sattr);
-        if (ctx != NULL)
-                put_nfs_open_context(ctx);
-        put_rpccred(cred);
         return status;
 }
 
@@ -1897,17 +1893,16 @@ nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
                 goto out;
         }
         state = nfs4_do_open(dir, &path, flags, sattr, cred);
-        put_rpccred(cred);
         d_drop(dentry);
         if (IS_ERR(state)) {
                 status = PTR_ERR(state);
-                goto out;
+                goto out_putcred;
         }
         d_add(dentry, igrab(state->inode));
         nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
         if (flags & O_EXCL) {
                 struct nfs_fattr fattr;
-                status = nfs4_do_setattr(state->inode, &fattr, sattr, state);
+                status = nfs4_do_setattr(state->inode, cred, &fattr, sattr, state);
                 if (status == 0)
                         nfs_setattr_update_inode(state->inode, sattr);
                 nfs_post_op_update_inode(state->inode, &fattr);
@@ -1916,6 +1911,8 @@ nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
                 status = nfs4_intent_set_file(nd, &path, state);
         else
                 nfs4_close_sync(&path, state, flags);
+out_putcred:
+        put_rpccred(cred);
 out:
         return status;
 }
@@ -2079,47 +2076,81 @@ static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *n
         return err;
 }
 
+struct nfs4_createdata {
+        struct rpc_message msg;
+        struct nfs4_create_arg arg;
+        struct nfs4_create_res res;
+        struct nfs_fh fh;
+        struct nfs_fattr fattr;
+        struct nfs_fattr dir_fattr;
+};
+
+static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
+                struct qstr *name, struct iattr *sattr, u32 ftype)
+{
+        struct nfs4_createdata *data;
+
+        data = kzalloc(sizeof(*data), GFP_KERNEL);
+        if (data != NULL) {
+                struct nfs_server *server = NFS_SERVER(dir);
+
+                data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
+                data->msg.rpc_argp = &data->arg;
+                data->msg.rpc_resp = &data->res;
+                data->arg.dir_fh = NFS_FH(dir);
+                data->arg.server = server;
+                data->arg.name = name;
+                data->arg.attrs = sattr;
+                data->arg.ftype = ftype;
+                data->arg.bitmask = server->attr_bitmask;
+                data->res.server = server;
+                data->res.fh = &data->fh;
+                data->res.fattr = &data->fattr;
+                data->res.dir_fattr = &data->dir_fattr;
+                nfs_fattr_init(data->res.fattr);
+                nfs_fattr_init(data->res.dir_fattr);
+        }
+        return data;
+}
+
+static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
+{
+        int status = rpc_call_sync(NFS_CLIENT(dir), &data->msg, 0);
+        if (status == 0) {
+                update_changeattr(dir, &data->res.dir_cinfo);
+                nfs_post_op_update_inode(dir, data->res.dir_fattr);
+                status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
+        }
+        return status;
+}
+
+static void nfs4_free_createdata(struct nfs4_createdata *data)
+{
+        kfree(data);
+}
+
 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
                 struct page *page, unsigned int len, struct iattr *sattr)
 {
-        struct nfs_server *server = NFS_SERVER(dir);
-        struct nfs_fh fhandle;
-        struct nfs_fattr fattr, dir_fattr;
-        struct nfs4_create_arg arg = {
-                .dir_fh = NFS_FH(dir),
-                .server = server,
-                .name = &dentry->d_name,
-                .attrs = sattr,
-                .ftype = NF4LNK,
-                .bitmask = server->attr_bitmask,
-        };
-        struct nfs4_create_res res = {
-                .server = server,
-                .fh = &fhandle,
-                .fattr = &fattr,
-                .dir_fattr = &dir_fattr,
-        };
-        struct rpc_message msg = {
-                .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK],
-                .rpc_argp = &arg,
-                .rpc_resp = &res,
-        };
-        int                     status;
+        struct nfs4_createdata *data;
+        int status = -ENAMETOOLONG;
 
         if (len > NFS4_MAXPATHLEN)
-                return -ENAMETOOLONG;
+                goto out;
 
-        arg.u.symlink.pages = &page;
-        arg.u.symlink.len = len;
-        nfs_fattr_init(&fattr);
-        nfs_fattr_init(&dir_fattr);
+        status = -ENOMEM;
+        data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
+        if (data == NULL)
+                goto out;
+
+        data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
+        data->arg.u.symlink.pages = &page;
+        data->arg.u.symlink.len = len;
         
-        status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
-        if (!status) {
-                update_changeattr(dir, &res.dir_cinfo);
-                nfs_post_op_update_inode(dir, res.dir_fattr);
-                status = nfs_instantiate(dentry, &fhandle, &fattr);
-        }
+        status = nfs4_do_create(dir, dentry, data);
+
+        nfs4_free_createdata(data);
+out:
         return status;
 }
 
@@ -2140,39 +2171,17 @@ static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
                 struct iattr *sattr)
 {
-        struct nfs_server *server = NFS_SERVER(dir);
-        struct nfs_fh fhandle;
-        struct nfs_fattr fattr, dir_fattr;
-        struct nfs4_create_arg arg = {
-                .dir_fh = NFS_FH(dir),
-                .server = server,
-                .name = &dentry->d_name,
-                .attrs = sattr,
-                .ftype = NF4DIR,
-                .bitmask = server->attr_bitmask,
-        };
-        struct nfs4_create_res res = {
-                .server = server,
-                .fh = &fhandle,
-                .fattr = &fattr,
-                .dir_fattr = &dir_fattr,
-        };
-        struct rpc_message msg = {
-                .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
-                .rpc_argp = &arg,
-                .rpc_resp = &res,
-        };
-        int                     status;
+        struct nfs4_createdata *data;
+        int status = -ENOMEM;
 
-        nfs_fattr_init(&fattr);
-        nfs_fattr_init(&dir_fattr);
-        
-        status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
-        if (!status) {
-                update_changeattr(dir, &res.dir_cinfo);
-                nfs_post_op_update_inode(dir, res.dir_fattr);
-                status = nfs_instantiate(dentry, &fhandle, &fattr);
-        }
+        data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
+        if (data == NULL)
+                goto out;
+
+        status = nfs4_do_create(dir, dentry, data);
+
+        nfs4_free_createdata(data);
+out:
         return status;
 }
 
@@ -2242,56 +2251,34 @@ static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
                 struct iattr *sattr, dev_t rdev)
 {
-        struct nfs_server *server = NFS_SERVER(dir);
-        struct nfs_fh fh;
-        struct nfs_fattr fattr, dir_fattr;
-        struct nfs4_create_arg arg = {
-                .dir_fh = NFS_FH(dir),
-                .server = server,
-                .name = &dentry->d_name,
-                .attrs = sattr,
-                .bitmask = server->attr_bitmask,
-        };
-        struct nfs4_create_res res = {
-                .server = server,
-                .fh = &fh,
-                .fattr = &fattr,
-                .dir_fattr = &dir_fattr,
-        };
-        struct rpc_message msg = {
-                .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
-                .rpc_argp = &arg,
-                .rpc_resp = &res,
-        };
-        int                     status;
-        int                     mode = sattr->ia_mode;
-
-        nfs_fattr_init(&fattr);
-        nfs_fattr_init(&dir_fattr);
+        struct nfs4_createdata *data;
+        int mode = sattr->ia_mode;
+        int status = -ENOMEM;
 
         BUG_ON(!(sattr->ia_valid & ATTR_MODE));
         BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
+
+        data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
+        if (data == NULL)
+                goto out;
+
         if (S_ISFIFO(mode))
-                arg.ftype = NF4FIFO;
+                data->arg.ftype = NF4FIFO;
         else if (S_ISBLK(mode)) {
-                arg.ftype = NF4BLK;
-                arg.u.device.specdata1 = MAJOR(rdev);
-                arg.u.device.specdata2 = MINOR(rdev);
+                data->arg.ftype = NF4BLK;
+                data->arg.u.device.specdata1 = MAJOR(rdev);
+                data->arg.u.device.specdata2 = MINOR(rdev);
         }
         else if (S_ISCHR(mode)) {
-                arg.ftype = NF4CHR;
-                arg.u.device.specdata1 = MAJOR(rdev);
-                arg.u.device.specdata2 = MINOR(rdev);
+                data->arg.ftype = NF4CHR;
+                data->arg.u.device.specdata1 = MAJOR(rdev);
+                data->arg.u.device.specdata2 = MINOR(rdev);
         }
-        else
-                arg.ftype = NF4SOCK;
         
-        status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
-        if (status == 0) {
-                update_changeattr(dir, &res.dir_cinfo);
-                nfs_post_op_update_inode(dir, res.dir_fattr);
-                status = nfs_instantiate(dentry, &fh, &fattr);
-        }
+        status = nfs4_do_create(dir, dentry, data);
+
+        nfs4_free_createdata(data);
+out:
         return status;
 }
 
@@ -2706,6 +2693,8 @@ 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;
@@ -2733,7 +2722,8 @@ static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t bufl
         nfs_inode_return_delegation(inode);
         buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
         ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
-        nfs_zap_caches(inode);
+        nfs_access_zap_cache(inode);
+        nfs_zap_acl_cache(inode);
         return ret;
 }
 
@@ -2767,8 +2757,7 @@ nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server)
                         task->tk_status = 0;
                         return -EAGAIN;
                 case -NFS4ERR_DELAY:
-                        nfs_inc_server_stats((struct nfs_server *) server,
-                                                NFSIOS_DELAY);
+                        nfs_inc_server_stats(server, NFSIOS_DELAY);
                 case -NFS4ERR_GRACE:
                         rpc_delay(task, NFS4_POLL_RETRY_MAX);
                         task->tk_status = 0;
@@ -2933,7 +2922,7 @@ static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cre
 
 int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
 {
-        long timeout;
+        long timeout = 0;
         int err;
         do {
                 err = _nfs4_proc_setclientid_confirm(clp, cred);
@@ -3725,8 +3714,6 @@ const struct nfs_rpc_ops nfs_v4_clientops = {
         .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,
         .clear_acl_cache = nfs4_zap_acl_attr,
 };
diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c
index 856a8934f610..401ef8b28f97 100644
--- a/fs/nfs/nfs4state.c
+++ b/fs/nfs/nfs4state.c
@@ -940,7 +940,6 @@ static int reclaimer(void *ptr)
         allow_signal(SIGKILL);
 
         /* Ensure exclusive access to NFSv4 state */
-        lock_kernel();
         down_write(&clp->cl_sem);
         /* Are there any NFS mounts out there? */
         if (list_empty(&clp->cl_superblocks))
@@ -1000,7 +999,6 @@ restart_loop:
         nfs_delegation_reap_unclaimed(clp);
 out:
         up_write(&clp->cl_sem);
-        unlock_kernel();
         if (status == -NFS4ERR_CB_PATH_DOWN)
                 nfs_handle_cb_pathdown(clp);
         nfs4_clear_recover_bit(clp);
diff --git a/fs/nfs/nfsroot.c b/fs/nfs/nfsroot.c
index 531379d36823..46763d1cd397 100644
--- a/fs/nfs/nfsroot.c
+++ b/fs/nfs/nfsroot.c
@@ -1,6 +1,4 @@
 /*
- *  $Id: nfsroot.c,v 1.45 1998/03/07 10:44:46 mj Exp $
- *
  *  Copyright (C) 1995, 1996  Gero Kuhlmann <gero@gkminix.han.de>
  *
  *  Allow an NFS filesystem to be mounted as root. The way this works is:
@@ -297,10 +295,10 @@ static int __init root_nfs_name(char *name)
         nfs_data.flags    = NFS_MOUNT_NONLM;    /* No lockd in nfs root yet */
         nfs_data.rsize    = NFS_DEF_FILE_IO_SIZE;
         nfs_data.wsize    = NFS_DEF_FILE_IO_SIZE;
-        nfs_data.acregmin = 3;
-        nfs_data.acregmax = 60;
-        nfs_data.acdirmin = 30;
-        nfs_data.acdirmax = 60;
+        nfs_data.acregmin = NFS_DEF_ACREGMIN;
+        nfs_data.acregmax = NFS_DEF_ACREGMAX;
+        nfs_data.acdirmin = NFS_DEF_ACDIRMIN;
+        nfs_data.acdirmax = NFS_DEF_ACDIRMAX;
         strcpy(buf, NFS_ROOT);
 
         /* Process options received from the remote server */
diff --git a/fs/nfs/proc.c b/fs/nfs/proc.c
index 03599bfe81cf..4dbb84df1b68 100644
--- a/fs/nfs/proc.c
+++ b/fs/nfs/proc.c
@@ -129,6 +129,8 @@ nfs_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
         sattr->ia_mode &= S_IALLUGO;
 
         dprintk("NFS call  setattr\n");
+        if (sattr->ia_valid & ATTR_FILE)
+                msg.rpc_cred = nfs_file_cred(sattr->ia_file);
         nfs_fattr_init(fattr);
         status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
         if (status == 0)
@@ -598,6 +600,29 @@ nfs_proc_lock(struct file *filp, int cmd, struct file_lock *fl)
         return nlmclnt_proc(NFS_SERVER(inode)->nlm_host, cmd, fl);
 }
 
+/* Helper functions for NFS lock bounds checking */
+#define NFS_LOCK32_OFFSET_MAX ((__s32)0x7fffffffUL)
+static int nfs_lock_check_bounds(const struct file_lock *fl)
+{
+        __s32 start, end;
+
+        start = (__s32)fl->fl_start;
+        if ((loff_t)start != fl->fl_start)
+                goto out_einval;
+
+        if (fl->fl_end != OFFSET_MAX) {
+                end = (__s32)fl->fl_end;
+                if ((loff_t)end != fl->fl_end)
+                        goto out_einval;
+        } else
+                end = NFS_LOCK32_OFFSET_MAX;
+
+        if (start < 0 || start > end)
+                goto out_einval;
+        return 0;
+out_einval:
+        return -EINVAL;
+}
 
 const struct nfs_rpc_ops nfs_v2_clientops = {
         .version        = 2,                   /* protocol version */
@@ -630,7 +655,6 @@ const struct nfs_rpc_ops nfs_v2_clientops = {
         .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,
         .lock           = nfs_proc_lock,
+        .lock_check_bounds = nfs_lock_check_bounds,
 };
diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index 614efeed5437..1b94e3650f5c 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -47,6 +47,7 @@
 #include <linux/inet.h>
 #include <linux/in6.h>
 #include <net/ipv6.h>
+#include <linux/netdevice.h>
 #include <linux/nfs_xdr.h>
 #include <linux/magic.h>
 #include <linux/parser.h>
@@ -65,7 +66,6 @@
 enum {
         /* Mount options that take no arguments */
         Opt_soft, Opt_hard,
-        Opt_intr, Opt_nointr,
         Opt_posix, Opt_noposix,
         Opt_cto, Opt_nocto,
         Opt_ac, Opt_noac,
@@ -92,8 +92,8 @@ enum {
         Opt_sec, Opt_proto, Opt_mountproto, Opt_mounthost,
         Opt_addr, Opt_mountaddr, Opt_clientaddr,
 
-        /* Mount options that are ignored */
-        Opt_userspace, Opt_deprecated,
+        /* Special mount options */
+        Opt_userspace, Opt_deprecated, Opt_sloppy,
 
         Opt_err
 };
@@ -101,10 +101,14 @@ enum {
 static match_table_t nfs_mount_option_tokens = {
         { Opt_userspace, "bg" },
         { Opt_userspace, "fg" },
+        { Opt_userspace, "retry=%s" },
+
+        { Opt_sloppy, "sloppy" },
+
         { Opt_soft, "soft" },
         { Opt_hard, "hard" },
-        { Opt_intr, "intr" },
-        { Opt_nointr, "nointr" },
+        { Opt_deprecated, "intr" },
+        { Opt_deprecated, "nointr" },
         { Opt_posix, "posix" },
         { Opt_noposix, "noposix" },
         { Opt_cto, "cto" },
@@ -136,7 +140,6 @@ static match_table_t nfs_mount_option_tokens = {
         { Opt_acdirmin, "acdirmin=%u" },
         { Opt_acdirmax, "acdirmax=%u" },
         { Opt_actimeo, "actimeo=%u" },
-        { Opt_userspace, "retry=%u" },
         { Opt_namelen, "namlen=%u" },
         { Opt_mountport, "mountport=%u" },
         { Opt_mountvers, "mountvers=%u" },
@@ -207,6 +210,7 @@ static int nfs_xdev_get_sb(struct file_system_type *fs_type,
                 int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt);
 static void nfs_kill_super(struct super_block *);
 static void nfs_put_super(struct super_block *);
+static int nfs_remount(struct super_block *sb, int *flags, char *raw_data);
 
 static struct file_system_type nfs_fs_type = {
         .owner          = THIS_MODULE,
@@ -234,6 +238,7 @@ static const struct super_operations nfs_sops = {
         .umount_begin   = nfs_umount_begin,
         .show_options   = nfs_show_options,
         .show_stats     = nfs_show_stats,
+        .remount_fs     = nfs_remount,
 };
 
 #ifdef CONFIG_NFS_V4
@@ -278,6 +283,7 @@ static const struct super_operations nfs4_sops = {
         .umount_begin   = nfs_umount_begin,
         .show_options   = nfs_show_options,
         .show_stats     = nfs_show_stats,
+        .remount_fs     = nfs_remount,
 };
 #endif
 
@@ -368,8 +374,6 @@ static int nfs_statfs(struct dentry *dentry, struct kstatfs *buf)
         };
         int error;
 
-        lock_kernel();
-
         error = server->nfs_client->rpc_ops->statfs(server, fh, &res);
         if (error < 0)
                 goto out_err;
@@ -401,12 +405,10 @@ static int nfs_statfs(struct dentry *dentry, struct kstatfs *buf)
 
         buf->f_namelen = server->namelen;
 
-        unlock_kernel();
         return 0;
 
  out_err:
         dprintk("%s: statfs error = %d\n", __func__, -error);
-        unlock_kernel();
         return error;
 }
 
@@ -514,13 +516,13 @@ static void nfs_show_mount_options(struct seq_file *m, struct nfs_server *nfss,
         if (nfss->bsize != 0)
                 seq_printf(m, ",bsize=%u", nfss->bsize);
         seq_printf(m, ",namlen=%u", nfss->namelen);
-        if (nfss->acregmin != 3*HZ || showdefaults)
+        if (nfss->acregmin != NFS_DEF_ACREGMIN*HZ || showdefaults)
                 seq_printf(m, ",acregmin=%u", nfss->acregmin/HZ);
-        if (nfss->acregmax != 60*HZ || showdefaults)
+        if (nfss->acregmax != NFS_DEF_ACREGMAX*HZ || showdefaults)
                 seq_printf(m, ",acregmax=%u", nfss->acregmax/HZ);
-        if (nfss->acdirmin != 30*HZ || showdefaults)
+        if (nfss->acdirmin != NFS_DEF_ACDIRMIN*HZ || showdefaults)
                 seq_printf(m, ",acdirmin=%u", nfss->acdirmin/HZ);
-        if (nfss->acdirmax != 60*HZ || showdefaults)
+        if (nfss->acdirmax != NFS_DEF_ACDIRMAX*HZ || showdefaults)
                 seq_printf(m, ",acdirmax=%u", nfss->acdirmax/HZ);
         for (nfs_infop = nfs_info; nfs_infop->flag; nfs_infop++) {
                 if (nfss->flags & nfs_infop->flag)
@@ -702,49 +704,233 @@ static int nfs_verify_server_address(struct sockaddr *addr)
         return 0;
 }
 
+static void nfs_parse_ipv4_address(char *string, size_t str_len,
+                                   struct sockaddr *sap, size_t *addr_len)
+{
+        struct sockaddr_in *sin = (struct sockaddr_in *)sap;
+        u8 *addr = (u8 *)&sin->sin_addr.s_addr;
+
+        if (str_len <= INET_ADDRSTRLEN) {
+                dfprintk(MOUNT, "NFS: parsing IPv4 address %*s\n",
+                                (int)str_len, string);
+
+                sin->sin_family = AF_INET;
+                *addr_len = sizeof(*sin);
+                if (in4_pton(string, str_len, addr, '\0', NULL))
+                        return;
+        }
+
+        sap->sa_family = AF_UNSPEC;
+        *addr_len = 0;
+}
+
+#define IPV6_SCOPE_DELIMITER    '%'
+
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+static void nfs_parse_ipv6_scope_id(const char *string, const size_t str_len,
+                                    const char *delim,
+                                    struct sockaddr_in6 *sin6)
+{
+        char *p;
+        size_t len;
+
+        if (!(ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL))
+                return ;
+        if (*delim != IPV6_SCOPE_DELIMITER)
+                return;
+
+        len = (string + str_len) - delim - 1;
+        p = kstrndup(delim + 1, len, GFP_KERNEL);
+        if (p) {
+                unsigned long scope_id = 0;
+                struct net_device *dev;
+
+                dev = dev_get_by_name(&init_net, p);
+                if (dev != NULL) {
+                        scope_id = dev->ifindex;
+                        dev_put(dev);
+                } else {
+                        /* scope_id is set to zero on error */
+                        strict_strtoul(p, 10, &scope_id);
+                }
+
+                kfree(p);
+                sin6->sin6_scope_id = scope_id;
+                dfprintk(MOUNT, "NFS: IPv6 scope ID = %lu\n", scope_id);
+        }
+}
+
+static void nfs_parse_ipv6_address(char *string, size_t str_len,
+                                   struct sockaddr *sap, size_t *addr_len)
+{
+        struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sap;
+        u8 *addr = (u8 *)&sin6->sin6_addr.in6_u;
+        const char *delim;
+
+        if (str_len <= INET6_ADDRSTRLEN) {
+                dfprintk(MOUNT, "NFS: parsing IPv6 address %*s\n",
+                                (int)str_len, string);
+
+                sin6->sin6_family = AF_INET6;
+                *addr_len = sizeof(*sin6);
+                if (in6_pton(string, str_len, addr, IPV6_SCOPE_DELIMITER, &delim)) {
+                        nfs_parse_ipv6_scope_id(string, str_len, delim, sin6);
+                        return;
+                }
+        }
+
+        sap->sa_family = AF_UNSPEC;
+        *addr_len = 0;
+}
+#else
+static void nfs_parse_ipv6_address(char *string, size_t str_len,
+                                   struct sockaddr *sap, size_t *addr_len)
+{
+        sap->sa_family = AF_UNSPEC;
+        *addr_len = 0;
+}
+#endif
+
 /*
- * Parse string addresses passed in via a mount option,
- * and construct a sockaddr based on the result.
+ * Construct a sockaddr based on the contents of a string that contains
+ * an IP address in presentation format.
  *
- * If address parsing fails, set the sockaddr's address
- * family to AF_UNSPEC to force nfs_verify_server_address()
- * to punt the mount.
+ * If there is a problem constructing the new sockaddr, set the address
+ * family to AF_UNSPEC.
  */
-static void nfs_parse_server_address(char *value,
-                                     struct sockaddr *sap,
-                                     size_t *len)
+static void nfs_parse_ip_address(char *string, size_t str_len,
+                                 struct sockaddr *sap, size_t *addr_len)
 {
-        if (strchr(value, ':')) {
-                struct sockaddr_in6 *ap = (struct sockaddr_in6 *)sap;
-                u8 *addr = (u8 *)&ap->sin6_addr.in6_u;
+        unsigned int i, colons;
 
-                ap->sin6_family = AF_INET6;
-                *len = sizeof(*ap);
-                if (in6_pton(value, -1, addr, '\0', NULL))
-                        return;
-        } else {
-                struct sockaddr_in *ap = (struct sockaddr_in *)sap;
-                u8 *addr = (u8 *)&ap->sin_addr.s_addr;
+        colons = 0;
+        for (i = 0; i < str_len; i++)
+                if (string[i] == ':')
+                        colons++;
+
+        if (colons >= 2)
+                nfs_parse_ipv6_address(string, str_len, sap, addr_len);
+        else
+                nfs_parse_ipv4_address(string, str_len, sap, addr_len);
+}
+
+/*
+ * Sanity check the NFS transport protocol.
+ *
+ */
+static void nfs_validate_transport_protocol(struct nfs_parsed_mount_data *mnt)
+{
+        switch (mnt->nfs_server.protocol) {
+        case XPRT_TRANSPORT_UDP:
+        case XPRT_TRANSPORT_TCP:
+        case XPRT_TRANSPORT_RDMA:
+                break;
+        default:
+                mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP;
+        }
+}
+
+/*
+ * For text based NFSv2/v3 mounts, the mount protocol transport default
+ * settings should depend upon the specified NFS transport.
+ */
+static void nfs_set_mount_transport_protocol(struct nfs_parsed_mount_data *mnt)
+{
+        nfs_validate_transport_protocol(mnt);
 
-                ap->sin_family = AF_INET;
-                *len = sizeof(*ap);
-                if (in4_pton(value, -1, addr, '\0', NULL))
+        if (mnt->mount_server.protocol == XPRT_TRANSPORT_UDP ||
+            mnt->mount_server.protocol == XPRT_TRANSPORT_TCP)
                         return;
+        switch (mnt->nfs_server.protocol) {
+        case XPRT_TRANSPORT_UDP:
+                mnt->mount_server.protocol = XPRT_TRANSPORT_UDP;
+                break;
+        case XPRT_TRANSPORT_TCP:
+        case XPRT_TRANSPORT_RDMA:
+                mnt->mount_server.protocol = XPRT_TRANSPORT_TCP;
         }
+}
 
-        sap->sa_family = AF_UNSPEC;
-        *len = 0;
+/*
+ * Parse the value of the 'sec=' option.
+ *
+ * The flavor_len setting is for v4 mounts.
+ */
+static int nfs_parse_security_flavors(char *value,
+                                      struct nfs_parsed_mount_data *mnt)
+{
+        substring_t args[MAX_OPT_ARGS];
+
+        dfprintk(MOUNT, "NFS: parsing sec=%s option\n", value);
+
+        switch (match_token(value, nfs_secflavor_tokens, args)) {
+        case Opt_sec_none:
+                mnt->auth_flavor_len = 0;
+                mnt->auth_flavors[0] = RPC_AUTH_NULL;
+                break;
+        case Opt_sec_sys:
+                mnt->auth_flavor_len = 0;
+                mnt->auth_flavors[0] = RPC_AUTH_UNIX;
+                break;
+        case Opt_sec_krb5:
+                mnt->auth_flavor_len = 1;
+                mnt->auth_flavors[0] = RPC_AUTH_GSS_KRB5;
+                break;
+        case Opt_sec_krb5i:
+                mnt->auth_flavor_len = 1;
+                mnt->auth_flavors[0] = RPC_AUTH_GSS_KRB5I;
+                break;
+        case Opt_sec_krb5p:
+                mnt->auth_flavor_len = 1;
+                mnt->auth_flavors[0] = RPC_AUTH_GSS_KRB5P;
+                break;
+        case Opt_sec_lkey:
+                mnt->auth_flavor_len = 1;
+                mnt->auth_flavors[0] = RPC_AUTH_GSS_LKEY;
+                break;
+        case Opt_sec_lkeyi:
+                mnt->auth_flavor_len = 1;
+                mnt->auth_flavors[0] = RPC_AUTH_GSS_LKEYI;
+                break;
+        case Opt_sec_lkeyp:
+                mnt->auth_flavor_len = 1;
+                mnt->auth_flavors[0] = RPC_AUTH_GSS_LKEYP;
+                break;
+        case Opt_sec_spkm:
+                mnt->auth_flavor_len = 1;
+                mnt->auth_flavors[0] = RPC_AUTH_GSS_SPKM;
+                break;
+        case Opt_sec_spkmi:
+                mnt->auth_flavor_len = 1;
+                mnt->auth_flavors[0] = RPC_AUTH_GSS_SPKMI;
+                break;
+        case Opt_sec_spkmp:
+                mnt->auth_flavor_len = 1;
+                mnt->auth_flavors[0] = RPC_AUTH_GSS_SPKMP;
+                break;
+        default:
+                return 0;
+        }
+
+        return 1;
+}
+
+static void nfs_parse_invalid_value(const char *option)
+{
+        dfprintk(MOUNT, "NFS:   bad value specified for %s option\n", option);
 }
 
 /*
  * Error-check and convert a string of mount options from user space into
- * a data structure
+ * a data structure.  The whole mount string is processed; bad options are
+ * skipped as they are encountered.  If there were no errors, return 1;
+ * otherwise return 0 (zero).
  */
 static int nfs_parse_mount_options(char *raw,
                                    struct nfs_parsed_mount_data *mnt)
 {
         char *p, *string, *secdata;
-        int rc;
+        int rc, sloppy = 0, errors = 0;
 
         if (!raw) {
                 dfprintk(MOUNT, "NFS: mount options string was NULL.\n");
@@ -777,15 +963,16 @@ static int nfs_parse_mount_options(char *raw,
 
                 token = match_token(p, nfs_mount_option_tokens, args);
                 switch (token) {
+
+                /*
+                 * boolean options:  foo/nofoo
+                 */
                 case Opt_soft:
                         mnt->flags |= NFS_MOUNT_SOFT;
                         break;
                 case Opt_hard:
                         mnt->flags &= ~NFS_MOUNT_SOFT;
                         break;
-                case Opt_intr:
-                case Opt_nointr:
-                        break;
                 case Opt_posix:
                         mnt->flags |= NFS_MOUNT_POSIX;
                         break;
@@ -819,20 +1006,14 @@ static int nfs_parse_mount_options(char *raw,
                 case Opt_udp:
                         mnt->flags &= ~NFS_MOUNT_TCP;
                         mnt->nfs_server.protocol = XPRT_TRANSPORT_UDP;
-                        mnt->timeo = 7;
-                        mnt->retrans = 5;
                         break;
                 case Opt_tcp:
                         mnt->flags |= NFS_MOUNT_TCP;
                         mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP;
-                        mnt->timeo = 600;
-                        mnt->retrans = 2;
                         break;
                 case Opt_rdma:
                         mnt->flags |= NFS_MOUNT_TCP; /* for side protocols */
                         mnt->nfs_server.protocol = XPRT_TRANSPORT_RDMA;
-                        mnt->timeo = 600;
-                        mnt->retrans = 2;
                         break;
                 case Opt_acl:
                         mnt->flags &= ~NFS_MOUNT_NOACL;
@@ -853,165 +1034,144 @@ static int nfs_parse_mount_options(char *raw,
                         mnt->flags |= NFS_MOUNT_UNSHARED;
                         break;
 
+                /*
+                 * options that take numeric values
+                 */
                 case Opt_port:
-                        if (match_int(args, &option))
-                                return 0;
-                        if (option < 0 || option > 65535)
-                                return 0;
-                        mnt->nfs_server.port = option;
+                        if (match_int(args, &option) ||
+                            option < 0 || option > USHORT_MAX) {
+                                errors++;
+                                nfs_parse_invalid_value("port");
+                        } else
+                                mnt->nfs_server.port = option;
                         break;
                 case Opt_rsize:
-                        if (match_int(args, &mnt->rsize))
-                                return 0;
+                        if (match_int(args, &option) || option < 0) {
+                                errors++;
+                                nfs_parse_invalid_value("rsize");
+                        } else
+                                mnt->rsize = option;
                         break;
                 case Opt_wsize:
-                        if (match_int(args, &mnt->wsize))
-                                return 0;
+                        if (match_int(args, &option) || option < 0) {
+                                errors++;
+                                nfs_parse_invalid_value("wsize");
+                        } else
+                                mnt->wsize = option;
                         break;
                 case Opt_bsize:
-                        if (match_int(args, &option))
-                                return 0;
-                        if (option < 0)
-                                return 0;
-                        mnt->bsize = option;
+                        if (match_int(args, &option) || option < 0) {
+                                errors++;
+                                nfs_parse_invalid_value("bsize");
+                        } else
+                                mnt->bsize = option;
                         break;
                 case Opt_timeo:
-                        if (match_int(args, &mnt->timeo))
-                                return 0;
+                        if (match_int(args, &option) || option <= 0) {
+                                errors++;
+                                nfs_parse_invalid_value("timeo");
+                        } else
+                                mnt->timeo = option;
                         break;
                 case Opt_retrans:
-                        if (match_int(args, &mnt->retrans))
-                                return 0;
+                        if (match_int(args, &option) || option <= 0) {
+                                errors++;
+                                nfs_parse_invalid_value("retrans");
+                        } else
+                                mnt->retrans = option;
                         break;
                 case Opt_acregmin:
-                        if (match_int(args, &mnt->acregmin))
-                                return 0;
+                        if (match_int(args, &option) || option < 0) {
+                                errors++;
+                                nfs_parse_invalid_value("acregmin");
+                        } else
+                                mnt->acregmin = option;
                         break;
                 case Opt_acregmax:
-                        if (match_int(args, &mnt->acregmax))
-                                return 0;
+                        if (match_int(args, &option) || option < 0) {
+                                errors++;
+                                nfs_parse_invalid_value("acregmax");
+                        } else
+                                mnt->acregmax = option;
                         break;
                 case Opt_acdirmin:
-                        if (match_int(args, &mnt->acdirmin))
-                                return 0;
+                        if (match_int(args, &option) || option < 0) {
+                                errors++;
+                                nfs_parse_invalid_value("acdirmin");
+                        } else
+                                mnt->acdirmin = option;
                         break;
                 case Opt_acdirmax:
-                        if (match_int(args, &mnt->acdirmax))
-                                return 0;
+                        if (match_int(args, &option) || option < 0) {
+                                errors++;
+                                nfs_parse_invalid_value("acdirmax");
+                        } else
+                                mnt->acdirmax = option;
                         break;
                 case Opt_actimeo:
-                        if (match_int(args, &option))
-                                return 0;
-                        if (option < 0)
-                                return 0;
-                        mnt->acregmin =
-                        mnt->acregmax =
-                        mnt->acdirmin =
-                        mnt->acdirmax = option;
+                        if (match_int(args, &option) || option < 0) {
+                                errors++;
+                                nfs_parse_invalid_value("actimeo");
+                        } else
+                                mnt->acregmin = mnt->acregmax =
+                                mnt->acdirmin = mnt->acdirmax = option;
                         break;
                 case Opt_namelen:
-                        if (match_int(args, &mnt->namlen))
-                                return 0;
+                        if (match_int(args, &option) || option < 0) {
+                                errors++;
+                                nfs_parse_invalid_value("namlen");
+                        } else
+                                mnt->namlen = option;
                         break;
                 case Opt_mountport:
-                        if (match_int(args, &option))
-                                return 0;
-                        if (option < 0 || option > 65535)
-                                return 0;
-                        mnt->mount_server.port = option;
+                        if (match_int(args, &option) ||
+                            option < 0 || option > USHORT_MAX) {
+                                errors++;
+                                nfs_parse_invalid_value("mountport");
+                        } else
+                                mnt->mount_server.port = option;
                         break;
                 case Opt_mountvers:
-                        if (match_int(args, &option))
-                                return 0;
-                        if (option < 0)
-                                return 0;
-                        mnt->mount_server.version = option;
+                        if (match_int(args, &option) ||
+                            option < NFS_MNT_VERSION ||
+                            option > NFS_MNT3_VERSION) {
+                                errors++;
+                                nfs_parse_invalid_value("mountvers");
+                        } else
+                                mnt->mount_server.version = option;
                         break;
                 case Opt_nfsvers:
-                        if (match_int(args, &option))
-                                return 0;
+                        if (match_int(args, &option)) {
+                                errors++;
+                                nfs_parse_invalid_value("nfsvers");
+                                break;
+                        }
                         switch (option) {
-                        case 2:
+                        case NFS2_VERSION:
                                 mnt->flags &= ~NFS_MOUNT_VER3;
                                 break;
-                        case 3:
+                        case NFS3_VERSION:
                                 mnt->flags |= NFS_MOUNT_VER3;
                                 break;
                         default:
-                                goto out_unrec_vers;
+                                errors++;
+                                nfs_parse_invalid_value("nfsvers");
                         }
                         break;
 
+                /*
+                 * options that take text values
+                 */
                 case Opt_sec:
                         string = match_strdup(args);
                         if (string == NULL)
                                 goto out_nomem;
-                        token = match_token(string, nfs_secflavor_tokens, args);
+                        rc = nfs_parse_security_flavors(string, mnt);
                         kfree(string);
-
-                        /*
-                         * The flags setting is for v2/v3.  The flavor_len
-                         * setting is for v4.  v2/v3 also need to know the
-                         * difference between NULL and UNIX.
-                         */
-                        switch (token) {
-                        case Opt_sec_none:
-                                mnt->flags &= ~NFS_MOUNT_SECFLAVOUR;
-                                mnt->auth_flavor_len = 0;
-                                mnt->auth_flavors[0] = RPC_AUTH_NULL;
-                                break;
-                        case Opt_sec_sys:
-                                mnt->flags &= ~NFS_MOUNT_SECFLAVOUR;
-                                mnt->auth_flavor_len = 0;
-                                mnt->auth_flavors[0] = RPC_AUTH_UNIX;
-                                break;
-                        case Opt_sec_krb5:
-                                mnt->flags |= NFS_MOUNT_SECFLAVOUR;
-                                mnt->auth_flavor_len = 1;
-                                mnt->auth_flavors[0] = RPC_AUTH_GSS_KRB5;
-                                break;
-                        case Opt_sec_krb5i:
-                                mnt->flags |= NFS_MOUNT_SECFLAVOUR;
-                                mnt->auth_flavor_len = 1;
-                                mnt->auth_flavors[0] = RPC_AUTH_GSS_KRB5I;
-                                break;
-                        case Opt_sec_krb5p:
-                                mnt->flags |= NFS_MOUNT_SECFLAVOUR;
-                                mnt->auth_flavor_len = 1;
-                                mnt->auth_flavors[0] = RPC_AUTH_GSS_KRB5P;
-                                break;
-                        case Opt_sec_lkey:
-                                mnt->flags |= NFS_MOUNT_SECFLAVOUR;
-                                mnt->auth_flavor_len = 1;
-                                mnt->auth_flavors[0] = RPC_AUTH_GSS_LKEY;
-                                break;
-                        case Opt_sec_lkeyi:
-                                mnt->flags |= NFS_MOUNT_SECFLAVOUR;
-                                mnt->auth_flavor_len = 1;
-                                mnt->auth_flavors[0] = RPC_AUTH_GSS_LKEYI;
-                                break;
-                        case Opt_sec_lkeyp:
-                                mnt->flags |= NFS_MOUNT_SECFLAVOUR;
-                                mnt->auth_flavor_len = 1;
-                                mnt->auth_flavors[0] = RPC_AUTH_GSS_LKEYP;
-                                break;
-                        case Opt_sec_spkm:
-                                mnt->flags |= NFS_MOUNT_SECFLAVOUR;
-                                mnt->auth_flavor_len = 1;
-                                mnt->auth_flavors[0] = RPC_AUTH_GSS_SPKM;
-                                break;
-                        case Opt_sec_spkmi:
-                                mnt->flags |= NFS_MOUNT_SECFLAVOUR;
-                                mnt->auth_flavor_len = 1;
-                                mnt->auth_flavors[0] = RPC_AUTH_GSS_SPKMI;
-                                break;
-                        case Opt_sec_spkmp:
-                                mnt->flags |= NFS_MOUNT_SECFLAVOUR;
-                                mnt->auth_flavor_len = 1;
-                                mnt->auth_flavors[0] = RPC_AUTH_GSS_SPKMP;
-                                break;
-                        default:
-                                goto out_unrec_sec;
+                        if (!rc) {
+                                errors++;
+                                dfprintk(MOUNT, "NFS:   unrecognized "
+                                                "security flavor\n");
                         }
                         break;
                 case Opt_proto:
@@ -1026,24 +1186,20 @@ static int nfs_parse_mount_options(char *raw,
                         case Opt_xprt_udp:
                                 mnt->flags &= ~NFS_MOUNT_TCP;
                                 mnt->nfs_server.protocol = XPRT_TRANSPORT_UDP;
-                                mnt->timeo = 7;
-                                mnt->retrans = 5;
                                 break;
                         case Opt_xprt_tcp:
                                 mnt->flags |= NFS_MOUNT_TCP;
                                 mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP;
-                                mnt->timeo = 600;
-                                mnt->retrans = 2;
                                 break;
                         case Opt_xprt_rdma:
                                 /* vector side protocols to TCP */
                                 mnt->flags |= NFS_MOUNT_TCP;
                                 mnt->nfs_server.protocol = XPRT_TRANSPORT_RDMA;
-                                mnt->timeo = 600;
-                                mnt->retrans = 2;
                                 break;
                         default:
-                                goto out_unrec_xprt;
+                                errors++;
+                                dfprintk(MOUNT, "NFS:   unrecognized "
+                                                "transport protocol\n");
                         }
                         break;
                 case Opt_mountproto:
@@ -1063,16 +1219,19 @@ static int nfs_parse_mount_options(char *raw,
                                 break;
                         case Opt_xprt_rdma: /* not used for side protocols */
                         default:
-                                goto out_unrec_xprt;
+                                errors++;
+                                dfprintk(MOUNT, "NFS:   unrecognized "
+                                                "transport protocol\n");
                         }
                         break;
                 case Opt_addr:
                         string = match_strdup(args);
                         if (string == NULL)
                                 goto out_nomem;
-                        nfs_parse_server_address(string, (struct sockaddr *)
-                                                 &mnt->nfs_server.address,
-                                                 &mnt->nfs_server.addrlen);
+                        nfs_parse_ip_address(string, strlen(string),
+                                             (struct sockaddr *)
+                                                &mnt->nfs_server.address,
+                                             &mnt->nfs_server.addrlen);
                         kfree(string);
                         break;
                 case Opt_clientaddr:
@@ -1093,24 +1252,33 @@ static int nfs_parse_mount_options(char *raw,
                         string = match_strdup(args);
                         if (string == NULL)
                                 goto out_nomem;
-                        nfs_parse_server_address(string, (struct sockaddr *)
-                                                 &mnt->mount_server.address,
-                                                 &mnt->mount_server.addrlen);
+                        nfs_parse_ip_address(string, strlen(string),
+                                             (struct sockaddr *)
+                                                &mnt->mount_server.address,
+                                             &mnt->mount_server.addrlen);
                         kfree(string);
                         break;
 
+                /*
+                 * Special options
+                 */
+                case Opt_sloppy:
+                        sloppy = 1;
+                        dfprintk(MOUNT, "NFS:   relaxing parsing rules\n");
+                        break;
                 case Opt_userspace:
                 case Opt_deprecated:
+                        dfprintk(MOUNT, "NFS:   ignoring mount option "
+                                        "'%s'\n", p);
                         break;
 
                 default:
-                        goto out_unknown;
+                        errors++;
+                        dfprintk(MOUNT, "NFS:   unrecognized mount option "
+                                        "'%s'\n", p);
                 }
         }
 
-        nfs_set_port((struct sockaddr *)&mnt->nfs_server.address,
-                                mnt->nfs_server.port);
-
         return 1;
 
 out_nomem:
@@ -1120,21 +1288,6 @@ out_security_failure:
         free_secdata(secdata);
         printk(KERN_INFO "NFS: security options invalid: %d\n", rc);
         return 0;
-out_unrec_vers:
-        printk(KERN_INFO "NFS: unrecognized NFS version number\n");
-        return 0;
-
-out_unrec_xprt:
-        printk(KERN_INFO "NFS: unrecognized transport protocol\n");
-        return 0;
-
-out_unrec_sec:
-        printk(KERN_INFO "NFS: unrecognized security flavor\n");
-        return 0;
-
-out_unknown:
-        printk(KERN_INFO "NFS: unknown mount option: %s\n", p);
-        return 0;
 }
 
 /*
@@ -1188,11 +1341,146 @@ static int nfs_try_mount(struct nfs_parsed_mount_data *args,
         if (status == 0)
                 return 0;
 
-        dfprintk(MOUNT, "NFS: unable to mount server %s, error %d",
+        dfprintk(MOUNT, "NFS: unable to mount server %s, error %d\n",
                         hostname, status);
         return status;
 }
 
+static int nfs_parse_simple_hostname(const char *dev_name,
+                                     char **hostname, size_t maxnamlen,
+                                     char **export_path, size_t maxpathlen)
+{
+        size_t len;
+        char *colon, *comma;
+
+        colon = strchr(dev_name, ':');
+        if (colon == NULL)
+                goto out_bad_devname;
+
+        len = colon - dev_name;
+        if (len > maxnamlen)
+                goto out_hostname;
+
+        /* N.B. caller will free nfs_server.hostname in all cases */
+        *hostname = kstrndup(dev_name, len, GFP_KERNEL);
+        if (!*hostname)
+                goto out_nomem;
+
+        /* kill possible hostname list: not supported */
+        comma = strchr(*hostname, ',');
+        if (comma != NULL) {
+                if (comma == *hostname)
+                        goto out_bad_devname;
+                *comma = '\0';
+        }
+
+        colon++;
+        len = strlen(colon);
+        if (len > maxpathlen)
+                goto out_path;
+        *export_path = kstrndup(colon, len, GFP_KERNEL);
+        if (!*export_path)
+                goto out_nomem;
+
+        dfprintk(MOUNT, "NFS: MNTPATH: '%s'\n", *export_path);
+        return 0;
+
+out_bad_devname:
+        dfprintk(MOUNT, "NFS: device name not in host:path format\n");
+        return -EINVAL;
+
+out_nomem:
+        dfprintk(MOUNT, "NFS: not enough memory to parse device name\n");
+        return -ENOMEM;
+
+out_hostname:
+        dfprintk(MOUNT, "NFS: server hostname too long\n");
+        return -ENAMETOOLONG;
+
+out_path:
+        dfprintk(MOUNT, "NFS: export pathname too long\n");
+        return -ENAMETOOLONG;
+}
+
+/*
+ * Hostname has square brackets around it because it contains one or
+ * more colons.  We look for the first closing square bracket, and a
+ * colon must follow it.
+ */
+static int nfs_parse_protected_hostname(const char *dev_name,
+                                        char **hostname, size_t maxnamlen,
+                                        char **export_path, size_t maxpathlen)
+{
+        size_t len;
+        char *start, *end;
+
+        start = (char *)(dev_name + 1);
+
+        end = strchr(start, ']');
+        if (end == NULL)
+                goto out_bad_devname;
+        if (*(end + 1) != ':')
+                goto out_bad_devname;
+
+        len = end - start;
+        if (len > maxnamlen)
+                goto out_hostname;
+
+        /* N.B. caller will free nfs_server.hostname in all cases */
+        *hostname = kstrndup(start, len, GFP_KERNEL);
+        if (*hostname == NULL)
+                goto out_nomem;
+
+        end += 2;
+        len = strlen(end);
+        if (len > maxpathlen)
+                goto out_path;
+        *export_path = kstrndup(end, len, GFP_KERNEL);
+        if (!*export_path)
+                goto out_nomem;
+
+        return 0;
+
+out_bad_devname:
+        dfprintk(MOUNT, "NFS: device name not in host:path format\n");
+        return -EINVAL;
+
+out_nomem:
+        dfprintk(MOUNT, "NFS: not enough memory to parse device name\n");
+        return -ENOMEM;
+
+out_hostname:
+        dfprintk(MOUNT, "NFS: server hostname too long\n");
+        return -ENAMETOOLONG;
+
+out_path:
+        dfprintk(MOUNT, "NFS: export pathname too long\n");
+        return -ENAMETOOLONG;
+}
+
+/*
+ * Split "dev_name" into "hostname:export_path".
+ *
+ * The leftmost colon demarks the split between the server's hostname
+ * and the export path.  If the hostname starts with a left square
+ * bracket, then it may contain colons.
+ *
+ * Note: caller frees hostname and export path, even on error.
+ */
+static int nfs_parse_devname(const char *dev_name,
+                             char **hostname, size_t maxnamlen,
+                             char **export_path, size_t maxpathlen)
+{
+        if (*dev_name == '[')
+                return nfs_parse_protected_hostname(dev_name,
+                                                    hostname, maxnamlen,
+                                                    export_path, maxpathlen);
+
+        return nfs_parse_simple_hostname(dev_name,
+                                         hostname, maxnamlen,
+                                         export_path, maxpathlen);
+}
+
 /*
  * Validate the NFS2/NFS3 mount data
  * - fills in the mount root filehandle
@@ -1222,16 +1510,14 @@ static int nfs_validate_mount_data(void *options,
         args->flags             = (NFS_MOUNT_VER3 | NFS_MOUNT_TCP);
         args->rsize             = NFS_MAX_FILE_IO_SIZE;
         args->wsize             = NFS_MAX_FILE_IO_SIZE;
-        args->timeo             = 600;
-        args->retrans           = 2;
-        args->acregmin          = 3;
-        args->acregmax          = 60;
-        args->acdirmin          = 30;
-        args->acdirmax          = 60;
+        args->acregmin          = NFS_DEF_ACREGMIN;
+        args->acregmax          = NFS_DEF_ACREGMAX;
+        args->acdirmin          = NFS_DEF_ACDIRMIN;
+        args->acdirmax          = NFS_DEF_ACDIRMAX;
         args->mount_server.port = 0;    /* autobind unless user sets port */
-        args->mount_server.protocol = XPRT_TRANSPORT_UDP;
         args->nfs_server.port   = 0;    /* autobind unless user sets port */
         args->nfs_server.protocol = XPRT_TRANSPORT_TCP;
+        args->auth_flavors[0]   = RPC_AUTH_UNIX;
 
         switch (data->version) {
         case 1:
@@ -1289,7 +1575,9 @@ static int nfs_validate_mount_data(void *options,
                 args->nfs_server.hostname = kstrdup(data->hostname, GFP_KERNEL);
                 args->namlen            = data->namlen;
                 args->bsize             = data->bsize;
-                args->auth_flavors[0]   = data->pseudoflavor;
+
+                if (data->flags & NFS_MOUNT_SECFLAVOUR)
+                        args->auth_flavors[0] = data->pseudoflavor;
                 if (!args->nfs_server.hostname)
                         goto out_nomem;
 
@@ -1321,8 +1609,6 @@ static int nfs_validate_mount_data(void *options,
 
                 break;
         default: {
-                unsigned int len;
-                char *c;
                 int status;
 
                 if (nfs_parse_mount_options((char *)options, args) == 0)
@@ -1332,21 +1618,22 @@ static int nfs_validate_mount_data(void *options,
                                                 &args->nfs_server.address))
                         goto out_no_address;
 
-                c = strchr(dev_name, ':');
-                if (c == NULL)
-                        return -EINVAL;
-                len = c - dev_name;
-                /* N.B. caller will free nfs_server.hostname in all cases */
-                args->nfs_server.hostname = kstrndup(dev_name, len, GFP_KERNEL);
-                if (!args->nfs_server.hostname)
-                        goto out_nomem;
+                nfs_set_port((struct sockaddr *)&args->nfs_server.address,
+                                args->nfs_server.port);
 
-                c++;
-                if (strlen(c) > NFS_MAXPATHLEN)
-                        return -ENAMETOOLONG;
-                args->nfs_server.export_path = c;
+                nfs_set_mount_transport_protocol(args);
+
+                status = nfs_parse_devname(dev_name,
+                                           &args->nfs_server.hostname,
+                                           PAGE_SIZE,
+                                           &args->nfs_server.export_path,
+                                           NFS_MAXPATHLEN);
+                if (!status)
+                        status = nfs_try_mount(args, mntfh);
+
+                kfree(args->nfs_server.export_path);
+                args->nfs_server.export_path = NULL;
 
-                status = nfs_try_mount(args, mntfh);
                 if (status)
                         return status;
 
@@ -1354,9 +1641,6 @@ static int nfs_validate_mount_data(void *options,
                 }
         }
 
-        if (!(args->flags & NFS_MOUNT_SECFLAVOUR))
-                args->auth_flavors[0] = RPC_AUTH_UNIX;
-
 #ifndef CONFIG_NFS_V3
         if (args->flags & NFS_MOUNT_VER3)
                 goto out_v3_not_compiled;
@@ -1396,6 +1680,80 @@ out_invalid_fh:
         return -EINVAL;
 }
 
+static int
+nfs_compare_remount_data(struct nfs_server *nfss,
+                         struct nfs_parsed_mount_data *data)
+{
+        if (data->flags != nfss->flags ||
+            data->rsize != nfss->rsize ||
+            data->wsize != nfss->wsize ||
+            data->retrans != nfss->client->cl_timeout->to_retries ||
+            data->auth_flavors[0] != nfss->client->cl_auth->au_flavor ||
+            data->acregmin != nfss->acregmin / HZ ||
+            data->acregmax != nfss->acregmax / HZ ||
+            data->acdirmin != nfss->acdirmin / HZ ||
+            data->acdirmax != nfss->acdirmax / HZ ||
+            data->timeo != (10U * nfss->client->cl_timeout->to_initval / HZ) ||
+            data->nfs_server.addrlen != nfss->nfs_client->cl_addrlen ||
+            memcmp(&data->nfs_server.address, &nfss->nfs_client->cl_addr,
+                   data->nfs_server.addrlen) != 0)
+                return -EINVAL;
+
+        return 0;
+}
+
+static int
+nfs_remount(struct super_block *sb, int *flags, char *raw_data)
+{
+        int error;
+        struct nfs_server *nfss = sb->s_fs_info;
+        struct nfs_parsed_mount_data *data;
+        struct nfs_mount_data *options = (struct nfs_mount_data *)raw_data;
+        struct nfs4_mount_data *options4 = (struct nfs4_mount_data *)raw_data;
+        u32 nfsvers = nfss->nfs_client->rpc_ops->version;
+
+        /*
+         * Userspace mount programs that send binary options generally send
+         * them populated with default values. We have no way to know which
+         * ones were explicitly specified. Fall back to legacy behavior and
+         * just return success.
+         */
+        if ((nfsvers == 4 && options4->version == 1) ||
+            (nfsvers <= 3 && options->version >= 1 &&
+             options->version <= 6))
+                return 0;
+
+        data = kzalloc(sizeof(*data), GFP_KERNEL);
+        if (data == NULL)
+                return -ENOMEM;
+
+        /* fill out struct with values from existing mount */
+        data->flags = nfss->flags;
+        data->rsize = nfss->rsize;
+        data->wsize = nfss->wsize;
+        data->retrans = nfss->client->cl_timeout->to_retries;
+        data->auth_flavors[0] = nfss->client->cl_auth->au_flavor;
+        data->acregmin = nfss->acregmin / HZ;
+        data->acregmax = nfss->acregmax / HZ;
+        data->acdirmin = nfss->acdirmin / HZ;
+        data->acdirmax = nfss->acdirmax / HZ;
+        data->timeo = 10U * nfss->client->cl_timeout->to_initval / HZ;
+        data->nfs_server.addrlen = nfss->nfs_client->cl_addrlen;
+        memcpy(&data->nfs_server.address, &nfss->nfs_client->cl_addr,
+                data->nfs_server.addrlen);
+
+        /* overwrite those values with any that were specified */
+        error = nfs_parse_mount_options((char *)options, data);
+        if (error < 0)
+                goto out;
+
+        /* compare new mount options with old ones */
+        error = nfs_compare_remount_data(nfss, data);
+out:
+        kfree(data);
+        return error;
+}
+
 /*
  * Initialise the common bits of the superblock
  */
@@ -1811,14 +2169,13 @@ static int nfs4_validate_mount_data(void *options,
 
         args->rsize             = NFS_MAX_FILE_IO_SIZE;
         args->wsize             = NFS_MAX_FILE_IO_SIZE;
-        args->timeo             = 600;
-        args->retrans           = 2;
-        args->acregmin          = 3;
-        args->acregmax          = 60;
-        args->acdirmin          = 30;
-        args->acdirmax          = 60;
+        args->acregmin          = NFS_DEF_ACREGMIN;
+        args->acregmax          = NFS_DEF_ACREGMAX;
+        args->acdirmin          = NFS_DEF_ACDIRMIN;
+        args->acdirmax          = NFS_DEF_ACDIRMAX;
         args->nfs_server.port   = NFS_PORT; /* 2049 unless user set port= */
-        args->nfs_server.protocol = XPRT_TRANSPORT_TCP;
+        args->auth_flavors[0]   = RPC_AUTH_UNIX;
+        args->auth_flavor_len   = 0;
 
         switch (data->version) {
         case 1:
@@ -1834,18 +2191,13 @@ static int nfs4_validate_mount_data(void *options,
                                                 &args->nfs_server.address))
                         goto out_no_address;
 
-                switch (data->auth_flavourlen) {
-                case 0:
-                        args->auth_flavors[0] = RPC_AUTH_UNIX;
-                        break;
-                case 1:
+                if (data->auth_flavourlen) {
+                        if (data->auth_flavourlen > 1)
+                                goto out_inval_auth;
                         if (copy_from_user(&args->auth_flavors[0],
                                            data->auth_flavours,
                                            sizeof(args->auth_flavors[0])))
                                 return -EFAULT;
-                        break;
-                default:
-                        goto out_inval_auth;
                 }
 
                 c = strndup_user(data->hostname.data, NFS4_MAXNAMLEN);
@@ -1879,10 +2231,11 @@ static int nfs4_validate_mount_data(void *options,
                 args->acdirmin  = data->acdirmin;
                 args->acdirmax  = data->acdirmax;
                 args->nfs_server.protocol = data->proto;
+                nfs_validate_transport_protocol(args);
 
                 break;
         default: {
-                unsigned int len;
+                int status;
 
                 if (nfs_parse_mount_options((char *)options, args) == 0)
                         return -EINVAL;
@@ -1891,44 +2244,25 @@ static int nfs4_validate_mount_data(void *options,
                                                 &args->nfs_server.address))
                         return -EINVAL;
 
-                switch (args->auth_flavor_len) {
-                case 0:
-                        args->auth_flavors[0] = RPC_AUTH_UNIX;
-                        break;
-                case 1:
-                        break;
-                default:
-                        goto out_inval_auth;
-                }
+                nfs_set_port((struct sockaddr *)&args->nfs_server.address,
+                                args->nfs_server.port);
 
-                /*
-                 * Split "dev_name" into "hostname:mntpath".
-                 */
-                c = strchr(dev_name, ':');
-                if (c == NULL)
-                        return -EINVAL;
-                /* while calculating len, pretend ':' is '\0' */
-                len = c - dev_name;
-                if (len > NFS4_MAXNAMLEN)
-                        return -ENAMETOOLONG;
-                /* N.B. caller will free nfs_server.hostname in all cases */
-                args->nfs_server.hostname = kstrndup(dev_name, len, GFP_KERNEL);
-                if (!args->nfs_server.hostname)
-                        goto out_nomem;
-
-                c++;                    /* step over the ':' */
-                len = strlen(c);
-                if (len > NFS4_MAXPATHLEN)
-                        return -ENAMETOOLONG;
-                args->nfs_server.export_path = kstrndup(c, len, GFP_KERNEL);
-                if (!args->nfs_server.export_path)
-                        goto out_nomem;
+                nfs_validate_transport_protocol(args);
 
-                dprintk("NFS: MNTPATH: '%s'\n", args->nfs_server.export_path);
+                if (args->auth_flavor_len > 1)
+                        goto out_inval_auth;
 
                 if (args->client_address == NULL)
                         goto out_no_client_address;
 
+                status = nfs_parse_devname(dev_name,
+                                           &args->nfs_server.hostname,
+                                           NFS4_MAXNAMLEN,
+                                           &args->nfs_server.export_path,
+                                           NFS4_MAXPATHLEN);
+                if (status < 0)
+                        return status;
+
                 break;
                 }
         }
@@ -1944,10 +2278,6 @@ out_inval_auth:
                  data->auth_flavourlen);
         return -EINVAL;
 
-out_nomem:
-        dfprintk(MOUNT, "NFS4: not enough memory to handle mount options\n");
-        return -ENOMEM;
-
 out_no_address:
         dfprintk(MOUNT, "NFS4: mount program didn't pass remote address\n");
         return -EINVAL;
diff --git a/fs/nfs/write.c b/fs/nfs/write.c
index f333848fd3be..3229e217c773 100644
--- a/fs/nfs/write.c
+++ b/fs/nfs/write.c
@@ -34,9 +34,6 @@
 /*
  * Local function declarations
  */
-static struct nfs_page * nfs_update_request(struct nfs_open_context*,
-                                            struct page *,
-                                            unsigned int, unsigned int);
 static void nfs_pageio_init_write(struct nfs_pageio_descriptor *desc,
                                   struct inode *inode, int ioflags);
 static void nfs_redirty_request(struct nfs_page *req);
@@ -136,16 +133,21 @@ static struct nfs_page *nfs_page_find_request(struct page *page)
 static void nfs_grow_file(struct page *page, unsigned int offset, unsigned int count)
 {
         struct inode *inode = page->mapping->host;
-        loff_t end, i_size = i_size_read(inode);
-        pgoff_t end_index = (i_size - 1) >> PAGE_CACHE_SHIFT;
+        loff_t end, i_size;
+        pgoff_t end_index;
 
+        spin_lock(&inode->i_lock);
+        i_size = i_size_read(inode);
+        end_index = (i_size - 1) >> PAGE_CACHE_SHIFT;
         if (i_size > 0 && page->index < end_index)
-                return;
+                goto out;
         end = ((loff_t)page->index << PAGE_CACHE_SHIFT) + ((loff_t)offset+count);
         if (i_size >= end)
-                return;
-        nfs_inc_stats(inode, NFSIOS_EXTENDWRITE);
+                goto out;
         i_size_write(inode, end);
+        nfs_inc_stats(inode, NFSIOS_EXTENDWRITE);
+out:
+        spin_unlock(&inode->i_lock);
 }
 
 /* A writeback failed: mark the page as bad, and invalidate the page cache */
@@ -169,29 +171,6 @@ static void nfs_mark_uptodate(struct page *page, unsigned int base, unsigned int
         SetPageUptodate(page);
 }
 
-static int nfs_writepage_setup(struct nfs_open_context *ctx, struct page *page,
-                unsigned int offset, unsigned int count)
-{
-        struct nfs_page *req;
-        int ret;
-
-        for (;;) {
-                req = nfs_update_request(ctx, page, offset, count);
-                if (!IS_ERR(req))
-                        break;
-                ret = PTR_ERR(req);
-                if (ret != -EBUSY)
-                        return ret;
-                ret = nfs_wb_page(page->mapping->host, page);
-                if (ret != 0)
-                        return ret;
-        }
-        /* Update file length */
-        nfs_grow_file(page, offset, count);
-        nfs_clear_page_tag_locked(req);
-        return 0;
-}
-
 static int wb_priority(struct writeback_control *wbc)
 {
         if (wbc->for_reclaim)
@@ -268,12 +247,9 @@ static int nfs_page_async_flush(struct nfs_pageio_descriptor *pgio,
                         return ret;
                 spin_lock(&inode->i_lock);
         }
-        if (test_bit(PG_NEED_COMMIT, &req->wb_flags)) {
-                /* This request is marked for commit */
+        if (test_bit(PG_CLEAN, &req->wb_flags)) {
                 spin_unlock(&inode->i_lock);
-                nfs_clear_page_tag_locked(req);
-                nfs_pageio_complete(pgio);
-                return 0;
+                BUG();
         }
         if (nfs_set_page_writeback(page) != 0) {
                 spin_unlock(&inode->i_lock);
@@ -355,11 +331,19 @@ int nfs_writepages(struct address_space *mapping, struct writeback_control *wbc)
 /*
  * Insert a write request into an inode
  */
-static void nfs_inode_add_request(struct inode *inode, struct nfs_page *req)
+static int nfs_inode_add_request(struct inode *inode, struct nfs_page *req)
 {
         struct nfs_inode *nfsi = NFS_I(inode);
         int error;
 
+        error = radix_tree_preload(GFP_NOFS);
+        if (error != 0)
+                goto out;
+
+        /* Lock the request! */
+        nfs_lock_request_dontget(req);
+
+        spin_lock(&inode->i_lock);
         error = radix_tree_insert(&nfsi->nfs_page_tree, req->wb_index, req);
         BUG_ON(error);
         if (!nfsi->npages) {
@@ -373,6 +357,10 @@ static void nfs_inode_add_request(struct inode *inode, struct nfs_page *req)
         kref_get(&req->wb_kref);
         radix_tree_tag_set(&nfsi->nfs_page_tree, req->wb_index,
                                 NFS_PAGE_TAG_LOCKED);
+        spin_unlock(&inode->i_lock);
+        radix_tree_preload_end();
+out:
+        return error;
 }
 
 /*
@@ -405,19 +393,6 @@ nfs_mark_request_dirty(struct nfs_page *req)
         __set_page_dirty_nobuffers(req->wb_page);
 }
 
-/*
- * Check if a request is dirty
- */
-static inline int
-nfs_dirty_request(struct nfs_page *req)
-{
-        struct page *page = req->wb_page;
-
-        if (page == NULL || test_bit(PG_NEED_COMMIT, &req->wb_flags))
-                return 0;
-        return !PageWriteback(page);
-}
-
 #if defined(CONFIG_NFS_V3) || defined(CONFIG_NFS_V4)
 /*
  * Add a request to the inode's commit list.
@@ -430,7 +405,7 @@ nfs_mark_request_commit(struct nfs_page *req)
 
         spin_lock(&inode->i_lock);
         nfsi->ncommit++;
-        set_bit(PG_NEED_COMMIT, &(req)->wb_flags);
+        set_bit(PG_CLEAN, &(req)->wb_flags);
         radix_tree_tag_set(&nfsi->nfs_page_tree,
                         req->wb_index,
                         NFS_PAGE_TAG_COMMIT);
@@ -440,6 +415,19 @@ nfs_mark_request_commit(struct nfs_page *req)
         __mark_inode_dirty(inode, I_DIRTY_DATASYNC);
 }
 
+static int
+nfs_clear_request_commit(struct nfs_page *req)
+{
+        struct page *page = req->wb_page;
+
+        if (test_and_clear_bit(PG_CLEAN, &(req)->wb_flags)) {
+                dec_zone_page_state(page, NR_UNSTABLE_NFS);
+                dec_bdi_stat(page->mapping->backing_dev_info, BDI_RECLAIMABLE);
+                return 1;
+        }
+        return 0;
+}
+
 static inline
 int nfs_write_need_commit(struct nfs_write_data *data)
 {
@@ -449,7 +437,7 @@ int nfs_write_need_commit(struct nfs_write_data *data)
 static inline
 int nfs_reschedule_unstable_write(struct nfs_page *req)
 {
-        if (test_bit(PG_NEED_COMMIT, &req->wb_flags)) {
+        if (test_and_clear_bit(PG_NEED_COMMIT, &req->wb_flags)) {
                 nfs_mark_request_commit(req);
                 return 1;
         }
@@ -465,6 +453,12 @@ nfs_mark_request_commit(struct nfs_page *req)
 {
 }
 
+static inline int
+nfs_clear_request_commit(struct nfs_page *req)
+{
+        return 0;
+}
+
 static inline
 int nfs_write_need_commit(struct nfs_write_data *data)
 {
@@ -522,11 +516,8 @@ static void nfs_cancel_commit_list(struct list_head *head)
 
         while(!list_empty(head)) {
                 req = nfs_list_entry(head->next);
-                dec_zone_page_state(req->wb_page, NR_UNSTABLE_NFS);
-                dec_bdi_stat(req->wb_page->mapping->backing_dev_info,
-                                BDI_RECLAIMABLE);
                 nfs_list_remove_request(req);
-                clear_bit(PG_NEED_COMMIT, &(req)->wb_flags);
+                nfs_clear_request_commit(req);
                 nfs_inode_remove_request(req);
                 nfs_unlock_request(req);
         }
@@ -564,110 +555,124 @@ static inline int nfs_scan_commit(struct inode *inode, struct list_head *dst, pg
 #endif
 
 /*
- * Try to update any existing write request, or create one if there is none.
- * In order to match, the request's credentials must match those of
- * the calling process.
+ * Search for an existing write request, and attempt to update
+ * it to reflect a new dirty region on a given page.
  *
- * Note: Should always be called with the Page Lock held!
+ * If the attempt fails, then the existing request is flushed out
+ * to disk.
  */
-static struct nfs_page * nfs_update_request(struct nfs_open_context* ctx,
-                struct page *page, unsigned int offset, unsigned int bytes)
+static struct nfs_page *nfs_try_to_update_request(struct inode *inode,
+                struct page *page,
+                unsigned int offset,
+                unsigned int bytes)
 {
-        struct address_space *mapping = page->mapping;
-        struct inode *inode = mapping->host;
-        struct nfs_page         *req, *new = NULL;
-        pgoff_t         rqend, end;
+        struct nfs_page *req;
+        unsigned int rqend;
+        unsigned int end;
+        int error;
+
+        if (!PagePrivate(page))
+                return NULL;
 
         end = offset + bytes;
+        spin_lock(&inode->i_lock);
 
         for (;;) {
-                /* Loop over all inode entries and see if we find
-                 * A request for the page we wish to update
+                req = nfs_page_find_request_locked(page);
+                if (req == NULL)
+                        goto out_unlock;
+
+                rqend = req->wb_offset + req->wb_bytes;
+                /*
+                 * Tell the caller to flush out the request if
+                 * the offsets are non-contiguous.
+                 * Note: nfs_flush_incompatible() will already
+                 * have flushed out requests having wrong owners.
                  */
-                if (new) {
-                        if (radix_tree_preload(GFP_NOFS)) {
-                                nfs_release_request(new);
-                                return ERR_PTR(-ENOMEM);
-                        }
-                }
+                if (offset > rqend
+                    || end < req->wb_offset)
+                        goto out_flushme;
 
-                spin_lock(&inode->i_lock);
-                req = nfs_page_find_request_locked(page);
-                if (req) {
-                        if (!nfs_set_page_tag_locked(req)) {
-                                int error;
-
-                                spin_unlock(&inode->i_lock);
-                                error = nfs_wait_on_request(req);
-                                nfs_release_request(req);
-                                if (error < 0) {
-                                        if (new) {
-                                                radix_tree_preload_end();
-                                                nfs_release_request(new);
-                                        }
-                                        return ERR_PTR(error);
-                                }
-                                continue;
-                        }
-                        spin_unlock(&inode->i_lock);
-                        if (new) {
-                                radix_tree_preload_end();
-                                nfs_release_request(new);
-                        }
+                if (nfs_set_page_tag_locked(req))
                         break;
-                }
 
-                if (new) {
-                        nfs_lock_request_dontget(new);
-                        nfs_inode_add_request(inode, new);
-                        spin_unlock(&inode->i_lock);
-                        radix_tree_preload_end();
-                        req = new;
-                        goto zero_page;
-                }
+                /* The request is locked, so wait and then retry */
                 spin_unlock(&inode->i_lock);
-
-                new = nfs_create_request(ctx, inode, page, offset, bytes);
-                if (IS_ERR(new))
-                        return new;
+                error = nfs_wait_on_request(req);
+                nfs_release_request(req);
+                if (error != 0)
+                        goto out_err;
+                spin_lock(&inode->i_lock);
         }
 
-        /* We have a request for our page.
-         * If the creds don't match, or the
-         * page addresses don't match,
-         * tell the caller to wait on the conflicting
-         * request.
-         */
-        rqend = req->wb_offset + req->wb_bytes;
-        if (req->wb_context != ctx
-            || req->wb_page != page
-            || !nfs_dirty_request(req)
-            || offset > rqend || end < req->wb_offset) {
-                nfs_clear_page_tag_locked(req);
-                return ERR_PTR(-EBUSY);
-        }
+        if (nfs_clear_request_commit(req))
+                radix_tree_tag_clear(&NFS_I(inode)->nfs_page_tree,
+                                req->wb_index, NFS_PAGE_TAG_COMMIT);
 
         /* Okay, the request matches. Update the region */
         if (offset < req->wb_offset) {
                 req->wb_offset = offset;
                 req->wb_pgbase = offset;
-                req->wb_bytes = max(end, rqend) - req->wb_offset;
-                goto zero_page;
         }
-
         if (end > rqend)
                 req->wb_bytes = end - req->wb_offset;
-
+        else
+                req->wb_bytes = rqend - req->wb_offset;
+out_unlock:
+        spin_unlock(&inode->i_lock);
         return req;
-zero_page:
-        /* If this page might potentially be marked as up to date,
-         * then we need to zero any uninitalised data. */
-        if (req->wb_pgbase == 0 && req->wb_bytes != PAGE_CACHE_SIZE
-                        && !PageUptodate(req->wb_page))
-                zero_user_segment(req->wb_page, req->wb_bytes, PAGE_CACHE_SIZE);
+out_flushme:
+        spin_unlock(&inode->i_lock);
+        nfs_release_request(req);
+        error = nfs_wb_page(inode, page);
+out_err:
+        return ERR_PTR(error);
+}
+
+/*
+ * Try to update an existing write request, or create one if there is none.
+ *
+ * Note: Should always be called with the Page Lock held to prevent races
+ * if we have to add a new request. Also assumes that the caller has
+ * already called nfs_flush_incompatible() if necessary.
+ */
+static struct nfs_page * nfs_setup_write_request(struct nfs_open_context* ctx,
+                struct page *page, unsigned int offset, unsigned int bytes)
+{
+        struct inode *inode = page->mapping->host;
+        struct nfs_page *req;
+        int error;
+
+        req = nfs_try_to_update_request(inode, page, offset, bytes);
+        if (req != NULL)
+                goto out;
+        req = nfs_create_request(ctx, inode, page, offset, bytes);
+        if (IS_ERR(req))
+                goto out;
+        error = nfs_inode_add_request(inode, req);
+        if (error != 0) {
+                nfs_release_request(req);
+                req = ERR_PTR(error);
+        }
+out:
         return req;
 }
 
+static int nfs_writepage_setup(struct nfs_open_context *ctx, struct page *page,
+                unsigned int offset, unsigned int count)
+{
+        struct nfs_page *req;
+
+        req = nfs_setup_write_request(ctx, page, offset, count);
+        if (IS_ERR(req))
+                return PTR_ERR(req);
+        /* Update file length */
+        nfs_grow_file(page, offset, count);
+        nfs_mark_uptodate(page, req->wb_pgbase, req->wb_bytes);
+        nfs_clear_page_tag_locked(req);
+        return 0;
+}
+
 int nfs_flush_incompatible(struct file *file, struct page *page)
 {
         struct nfs_open_context *ctx = nfs_file_open_context(file);
@@ -685,8 +690,7 @@ int nfs_flush_incompatible(struct file *file, struct page *page)
                 req = nfs_page_find_request(page);
                 if (req == NULL)
                         return 0;
-                do_flush = req->wb_page != page || req->wb_context != ctx
-                        || !nfs_dirty_request(req);
+                do_flush = req->wb_page != page || req->wb_context != ctx;
                 nfs_release_request(req);
                 if (!do_flush)
                         return 0;
@@ -721,10 +725,10 @@ int nfs_updatepage(struct file *file, struct page *page,
 
         nfs_inc_stats(inode, NFSIOS_VFSUPDATEPAGE);
 
-        dprintk("NFS:      nfs_updatepage(%s/%s %d@%Ld)\n",
+        dprintk("NFS:       nfs_updatepage(%s/%s %d@%lld)\n",
                 file->f_path.dentry->d_parent->d_name.name,
                 file->f_path.dentry->d_name.name, count,
-                (long long)(page_offset(page) +offset));
+                (long long)(page_offset(page) + offset));
 
         /* If we're not using byte range locks, and we know the page
          * is up to date, it may be more efficient to extend the write
@@ -744,7 +748,7 @@ int nfs_updatepage(struct file *file, struct page *page,
         else
                 __set_page_dirty_nobuffers(page);
 
-        dprintk("NFS:      nfs_updatepage returns %d (isize %Ld)\n",
+        dprintk("NFS:       nfs_updatepage returns %d (isize %lld)\n",
                         status, (long long)i_size_read(inode));
         return status;
 }
@@ -752,12 +756,7 @@ int nfs_updatepage(struct file *file, struct page *page,
 static void nfs_writepage_release(struct nfs_page *req)
 {
 
-        if (PageError(req->wb_page)) {
-                nfs_end_page_writeback(req->wb_page);
-                nfs_inode_remove_request(req);
-        } else if (!nfs_reschedule_unstable_write(req)) {
-                /* Set the PG_uptodate flag */
-                nfs_mark_uptodate(req->wb_page, req->wb_pgbase, req->wb_bytes);
+        if (PageError(req->wb_page) || !nfs_reschedule_unstable_write(req)) {
                 nfs_end_page_writeback(req->wb_page);
                 nfs_inode_remove_request(req);
         } else
@@ -834,7 +833,7 @@ static int nfs_write_rpcsetup(struct nfs_page *req,
         NFS_PROTO(inode)->write_setup(data, &msg);
 
         dprintk("NFS: %5u initiated write call "
-                "(req %s/%Ld, %u bytes @ offset %Lu)\n",
+                "(req %s/%lld, %u bytes @ offset %llu)\n",
                 data->task.tk_pid,
                 inode->i_sb->s_id,
                 (long long)NFS_FILEID(inode),
@@ -978,13 +977,13 @@ static void nfs_pageio_init_write(struct nfs_pageio_descriptor *pgio,
 static void nfs_writeback_done_partial(struct rpc_task *task, void *calldata)
 {
         struct nfs_write_data   *data = calldata;
-        struct nfs_page         *req = data->req;
 
-        dprintk("NFS: write (%s/%Ld %d@%Ld)",
-                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));
+        dprintk("NFS: %5u write(%s/%lld %d@%lld)",
+                task->tk_pid,
+                data->req->wb_context->path.dentry->d_inode->i_sb->s_id,
+                (long long)
+                  NFS_FILEID(data->req->wb_context->path.dentry->d_inode),
+                data->req->wb_bytes, (long long)req_offset(data->req));
 
         nfs_writeback_done(task, data);
 }
@@ -1058,7 +1057,8 @@ static void nfs_writeback_release_full(void *calldata)
 
                 nfs_list_remove_request(req);
 
-                dprintk("NFS: write (%s/%Ld %d@%Ld)",
+                dprintk("NFS: %5u write (%s/%lld %d@%lld)",
+                        data->task.tk_pid,
                         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,
@@ -1078,8 +1078,6 @@ static void nfs_writeback_release_full(void *calldata)
                         dprintk(" marked for commit\n");
                         goto next;
                 }
-                /* Set the PG_uptodate flag? */
-                nfs_mark_uptodate(page, req->wb_pgbase, req->wb_bytes);
                 dprintk(" OK\n");
 remove_request:
                 nfs_end_page_writeback(page);
@@ -1133,7 +1131,7 @@ int nfs_writeback_done(struct rpc_task *task, struct nfs_write_data *data)
                 static unsigned long    complain;
 
                 if (time_before(complain, jiffies)) {
-                        dprintk("NFS: faulty NFS server %s:"
+                        dprintk("NFS:       faulty NFS server %s:"
                                 " (committed = %d) != (stable = %d)\n",
                                 NFS_SERVER(data->inode)->nfs_client->cl_hostname,
                                 resp->verf->committed, argp->stable);
@@ -1297,12 +1295,9 @@ static void nfs_commit_release(void *calldata)
         while (!list_empty(&data->pages)) {
                 req = nfs_list_entry(data->pages.next);
                 nfs_list_remove_request(req);
-                clear_bit(PG_NEED_COMMIT, &(req)->wb_flags);
-                dec_zone_page_state(req->wb_page, NR_UNSTABLE_NFS);
-                dec_bdi_stat(req->wb_page->mapping->backing_dev_info,
-                                BDI_RECLAIMABLE);
+                nfs_clear_request_commit(req);
 
-                dprintk("NFS: commit (%s/%Ld %d@%Ld)",
+                dprintk("NFS:       commit (%s/%lld %d@%lld)",
                         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,
@@ -1318,9 +1313,6 @@ static void nfs_commit_release(void *calldata)
                  * returned by the server against all stored verfs. */
                 if (!memcmp(req->wb_verf.verifier, data->verf.verifier, sizeof(data->verf.verifier))) {
                         /* We have a match */
-                        /* Set the PG_uptodate flag */
-                        nfs_mark_uptodate(req->wb_page, req->wb_pgbase,
-                                        req->wb_bytes);
                         nfs_inode_remove_request(req);
                         dprintk(" OK\n");
                         goto next;
@@ -1479,7 +1471,7 @@ int nfs_wb_page_cancel(struct inode *inode, struct page *page)
                 req = nfs_page_find_request(page);
                 if (req == NULL)
                         goto out;
-                if (test_bit(PG_NEED_COMMIT, &req->wb_flags)) {
+                if (test_bit(PG_CLEAN, &req->wb_flags)) {
                         nfs_release_request(req);
                         break;
                 }
diff --git a/fs/nfsd/nfs4callback.c b/fs/nfsd/nfs4callback.c
index 4d4760e687c3..702fa577aa6e 100644
--- a/fs/nfsd/nfs4callback.c
+++ b/fs/nfsd/nfs4callback.c
@@ -381,7 +381,7 @@ static int do_probe_callback(void *data)
                 .program        = &cb_program,
                 .version        = nfs_cb_version[1]->number,
                 .authflavor     = RPC_AUTH_UNIX, /* XXX: need AUTH_GSS... */
-                .flags          = (RPC_CLNT_CREATE_NOPING),
+                .flags          = (RPC_CLNT_CREATE_NOPING | RPC_CLNT_CREATE_QUIET),
         };
         struct rpc_message msg = {
                 .rpc_proc       = &nfs4_cb_procedures[NFSPROC4_CLNT_CB_NULL],