Merge commit 'nfsd/nfsd-next'

32 files changed, 653 insertions, 308 deletions

diff --git a/Documentation/filesystems/nfs-rdma.txt b/Documentation/filesystems/nfs-rdma.txt
new file mode 100644
index 000000000000..1ae34879574b
--- /dev/null
+++ b/Documentation/filesystems/nfs-rdma.txt
@@ -0,0 +1,252 @@
+################################################################################
+#									       #
+#				NFS/RDMA README				       #
+#									       #
+################################################################################
+
+ Author: NetApp and Open Grid Computing
+ Date: February 25, 2008
+
+Table of Contents
+~~~~~~~~~~~~~~~~~
+ - Overview
+ - Getting Help
+ - Installation
+ - Check RDMA and NFS Setup
+ - NFS/RDMA Setup
+
+Overview
+~~~~~~~~
+
+  This document describes how to install and setup the Linux NFS/RDMA client
+  and server software.
+
+  The NFS/RDMA client was first included in Linux 2.6.24. The NFS/RDMA server
+  was first included in the following release, Linux 2.6.25.
+
+  In our testing, we have obtained excellent performance results (full 10Gbit
+  wire bandwidth at minimal client CPU) under many workloads. The code passes
+  the full Connectathon test suite and operates over both Infiniband and iWARP
+  RDMA adapters.
+
+Getting Help
+~~~~~~~~~~~~
+
+  If you get stuck, you can ask questions on the
+
+                nfs-rdma-devel@lists.sourceforge.net
+
+  mailing list.
+
+Installation
+~~~~~~~~~~~~
+
+  These instructions are a step by step guide to building a machine for
+  use with NFS/RDMA.
+
+  - Install an RDMA device
+
+    Any device supported by the drivers in drivers/infiniband/hw is acceptable.
+
+    Testing has been performed using several Mellanox-based IB cards, the
+    Ammasso AMS1100 iWARP adapter, and the Chelsio cxgb3 iWARP adapter.
+
+  - Install a Linux distribution and tools
+
+    The first kernel release to contain both the NFS/RDMA client and server was
+    Linux 2.6.25  Therefore, a distribution compatible with this and subsequent
+    Linux kernel release should be installed.
+
+    The procedures described in this document have been tested with
+    distributions from Red Hat's Fedora Project (http://fedora.redhat.com/).
+
+  - Install nfs-utils-1.1.1 or greater on the client
+
+    An NFS/RDMA mount point can only be obtained by using the mount.nfs
+    command in nfs-utils-1.1.1 or greater. To see which version of mount.nfs
+    you are using, type:
+
+    > /sbin/mount.nfs -V
+
+    If the version is less than 1.1.1 or the command does not exist,
+    then you will need to install the latest version of nfs-utils.
+
+    Download the latest package from:
+
+    http://www.kernel.org/pub/linux/utils/nfs
+
+    Uncompress the package and follow the installation instructions.
+
+    If you will not be using GSS and NFSv4, the installation process
+    can be simplified by disabling these features when running configure:
+
+    > ./configure --disable-gss --disable-nfsv4
+
+    For more information on this see the package's README and INSTALL files.
+
+    After building the nfs-utils package, there will be a mount.nfs binary in
+    the utils/mount directory. This binary can be used to initiate NFS v2, v3,
+    or v4 mounts. To initiate a v4 mount, the binary must be called mount.nfs4.
+    The standard technique is to create a symlink called mount.nfs4 to mount.nfs.
+
+    NOTE: mount.nfs and therefore nfs-utils-1.1.1 or greater is only needed
+    on the NFS client machine. You do not need this specific version of
+    nfs-utils on the server. Furthermore, only the mount.nfs command from
+    nfs-utils-1.1.1 is needed on the client.
+
+  - Install a Linux kernel with NFS/RDMA
+
+    The NFS/RDMA client and server are both included in the mainline Linux
+    kernel version 2.6.25 and later. This and other versions of the 2.6 Linux
+    kernel can be found at:
+
+    ftp://ftp.kernel.org/pub/linux/kernel/v2.6/
+
+    Download the sources and place them in an appropriate location.
+
+  - Configure the RDMA stack
+
+    Make sure your kernel configuration has RDMA support enabled. Under
+    Device Drivers -> InfiniBand support, update the kernel configuration
+    to enable InfiniBand support [NOTE: the option name is misleading. Enabling
+    InfiniBand support is required for all RDMA devices (IB, iWARP, etc.)].
+
+    Enable the appropriate IB HCA support (mlx4, mthca, ehca, ipath, etc.) or
+    iWARP adapter support (amso, cxgb3, etc.).
+
+    If you are using InfiniBand, be sure to enable IP-over-InfiniBand support.
+
+  - Configure the NFS client and server
+
+    Your kernel configuration must also have NFS file system support and/or
+    NFS server support enabled. These and other NFS related configuration
+    options can be found under File Systems -> Network File Systems.
+
+  - Build, install, reboot
+
+    The NFS/RDMA code will be enabled automatically if NFS and RDMA
+    are turned on. The NFS/RDMA client and server are configured via the hidden
+    SUNRPC_XPRT_RDMA config option that depends on SUNRPC and INFINIBAND. The
+    value of SUNRPC_XPRT_RDMA will be:
+
+     - N if either SUNRPC or INFINIBAND are N, in this case the NFS/RDMA client
+       and server will not be built
+     - M if both SUNRPC and INFINIBAND are on (M or Y) and at least one is M,
+       in this case the NFS/RDMA client and server will be built as modules
+     - Y if both SUNRPC and INFINIBAND are Y, in this case the NFS/RDMA client
+       and server will be built into the kernel
+
+    Therefore, if you have followed the steps above and turned no NFS and RDMA,
+    the NFS/RDMA client and server will be built.
+
+    Build a new kernel, install it, boot it.
+
+Check RDMA and NFS Setup
+~~~~~~~~~~~~~~~~~~~~~~~~
+
+    Before configuring the NFS/RDMA software, it is a good idea to test
+    your new kernel to ensure that the kernel is working correctly.
+    In particular, it is a good idea to verify that the RDMA stack
+    is functioning as expected and standard NFS over TCP/IP and/or UDP/IP
+    is working properly.
+
+  - Check RDMA Setup
+
+    If you built the RDMA components as modules, load them at
+    this time. For example, if you are using a Mellanox Tavor/Sinai/Arbel
+    card:
+
+    > modprobe ib_mthca
+    > modprobe ib_ipoib
+
+    If you are using InfiniBand, make sure there is a Subnet Manager (SM)
+    running on the network. If your IB switch has an embedded SM, you can
+    use it. Otherwise, you will need to run an SM, such as OpenSM, on one
+    of your end nodes.
+
+    If an SM is running on your network, you should see the following:
+
+    > cat /sys/class/infiniband/driverX/ports/1/state
+    4: ACTIVE
+
+    where driverX is mthca0, ipath5, ehca3, etc.
+
+    To further test the InfiniBand software stack, use IPoIB (this
+    assumes you have two IB hosts named host1 and host2):
+
+    host1> ifconfig ib0 a.b.c.x
+    host2> ifconfig ib0 a.b.c.y
+    host1> ping a.b.c.y
+    host2> ping a.b.c.x
+
+    For other device types, follow the appropriate procedures.
+
+  - Check NFS Setup
+
+    For the NFS components enabled above (client and/or server),
+    test their functionality over standard Ethernet using TCP/IP or UDP/IP.
+
+NFS/RDMA Setup
+~~~~~~~~~~~~~~
+
+  We recommend that you use two machines, one to act as the client and
+  one to act as the server.
+
+  One time configuration:
+
+  - On the server system, configure the /etc/exports file and
+    start the NFS/RDMA server.
+
+    Exports entries with the following format have been tested:
+
+    /vol0   10.97.103.47(rw,async) 192.168.0.47(rw,async,insecure,no_root_squash)
+
+    Here the first IP address is the client's Ethernet address and the second
+    IP address is the clients IPoIB address.
+
+ Each time a machine boots:
+
+  - Load and configure the RDMA drivers
+
+    For InfiniBand using a Mellanox adapter:
+
+    > modprobe ib_mthca
+    > modprobe ib_ipoib
+    > ifconfig ib0 a.b.c.d
+
+    NOTE: use unique addresses for the client and server
+
+  - Start the NFS server
+
+    If the NFS/RDMA server was built as a module (CONFIG_SUNRPC_XPRT_RDMA=m in kernel config),
+    load the RDMA transport module:
+
+    > modprobe svcrdma
+
+    Regardless of how the server was built (module or built-in), start the server:
+
+    > /etc/init.d/nfs start
+
+    or
+
+    > service nfs start
+
+    Instruct the server to listen on the RDMA transport:
+
+    > echo rdma 2050 > /proc/fs/nfsd/portlist
+
+  - On the client system
+
+    If the NFS/RDMA client was built as a module (CONFIG_SUNRPC_XPRT_RDMA=m in kernel config),
+    load the RDMA client module:
+
+    > modprobe xprtrdma.ko
+
+    Regardless of how the client was built (module or built-in), issue the mount.nfs command:
+
+    > /path/to/your/mount.nfs <IPoIB-server-name-or-address>:/<export> /mnt -i -o rdma,port=2050
+
+    To verify that the mount is using RDMA, run "cat /proc/mounts" and check the
+    "proto" field for the given mount.
+
+  Congratulations! You're using NFS/RDMA!
diff --git a/fs/Kconfig b/fs/Kconfig
index 137b584acfcf..f8b86c69f8c0 100644
--- a/fs/Kconfig
+++ b/fs/Kconfig
@@ -411,7 +411,7 @@ config JFS_STATISTICS
 	  to be made available to the user in the /proc/fs/jfs/ directory.
 
 config FS_POSIX_ACL
-# Posix ACL utility routines (for now, only ext2/ext3/jfs/reiserfs)
+# Posix ACL utility routines (for now, only ext2/ext3/jfs/reiserfs/nfs4)
 #
 # NOTE: you can implement Posix ACLs without these helpers (XFS does).
 # 	Never use this symbol for ifdefs.
@@ -1644,75 +1644,81 @@ config NFSD
 	select LOCKD
 	select SUNRPC
 	select EXPORTFS
-	select NFSD_V2_ACL if NFSD_V3_ACL
 	select NFS_ACL_SUPPORT if NFSD_V2_ACL
-	select NFSD_TCP if NFSD_V4
-	select CRYPTO_MD5 if NFSD_V4
-	select CRYPTO if NFSD_V4
-	select FS_POSIX_ACL if NFSD_V4
 	select PROC_FS if NFSD_V4
 	select PROC_FS if SUNRPC_GSS
 	help
-	  If you want your Linux box to act as an NFS *server*, so that other
-	  computers on your local network which support NFS can access certain
-	  directories on your box transparently, you have two options: you can
-	  use the self-contained user space program nfsd, in which case you
-	  should say N here, or you can say Y and use the kernel based NFS
-	  server. The advantage of the kernel based solution is that it is
-	  faster.
+	  Choose Y here if you want to allow other computers to access
+	  files residing on this system using Sun's Network File System
+	  protocol.  To compile the NFS server support as a module,
+	  choose M here: the module will be called nfsd.
 
-	  In either case, you will need support software; the respective
-	  locations are given in the file <file:Documentation/Changes> in the
-	  NFS section.
+	  You may choose to use a user-space NFS server instead, in which
+	  case you can choose N here.
 
-	  If you say Y here, you will get support for version 2 of the NFS
-	  protocol (NFSv2). If you also want NFSv3, say Y to the next question
-	  as well.
+	  To export local file systems using NFS, you also need to install
+	  user space programs which can be found in the Linux nfs-utils
+	  package, available from http://linux-nfs.org/.  More detail about
+	  the Linux NFS server implementation is available via the
+	  exports(5) man page.
 
-	  Please read the NFS-HOWTO, available from
-	  <http://www.tldp.org/docs.html#howto>.
+	  Below you can choose which versions of the NFS protocol are
+	  available to clients mounting the NFS server on this system.
+	  Support for NFS version 2 (RFC 1094) is always available when
+	  CONFIG_NFSD is selected.
 
-	  To compile the NFS server support as a module, choose M here: the
-	  module will be called nfsd.  If unsure, say N.
+	  If unsure, say N.
 
 config NFSD_V2_ACL
 	bool
 	depends on NFSD
 
 config NFSD_V3
-	bool "Provide NFSv3 server support"
+	bool "NFS server support for NFS version 3"
 	depends on NFSD
 	help
-	  If you would like to include the NFSv3 server as well as the NFSv2
-	  server, say Y here.  If unsure, say Y.
+	  This option enables support in your system's NFS server for
+	  version 3 of the NFS protocol (RFC 1813).
+
+	  If unsure, say Y.
 
 config NFSD_V3_ACL
-	bool "Provide server support for the NFSv3 ACL protocol extension"
+	bool "NFS server support for the NFSv3 ACL protocol extension"
 	depends on NFSD_V3
+	select NFSD_V2_ACL
 	help
-	  Implement the NFSv3 ACL protocol extension for manipulating POSIX
-	  Access Control Lists on exported file systems. NFS clients should
-	  be compiled with the NFSv3 ACL protocol extension; see the
-	  CONFIG_NFS_V3_ACL option.  If unsure, say N.
+	  Solaris NFS servers support an auxiliary NFSv3 ACL protocol that
+	  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 POSIX ACLs on local files whether
+	  this protocol is available or not.
+
+	  This option enables support in your system's NFS server for the
+	  NFSv3 ACL protocol extension allowing NFS clients to manipulate
+	  POSIX ACLs on files exported by your system's NFS server.  NFS
+	  clients which support the Solaris NFSv3 ACL protocol can then
+	  access and modify ACLs on your NFS server.
+
+	  To store ACLs on your NFS server, you also need to enable ACL-
+	  related CONFIG options for your local file systems of choice.
+
+	  If unsure, say N.
 
 config NFSD_V4
-	bool "Provide NFSv4 server support (EXPERIMENTAL)"
+	bool "NFS server support for NFS version 4 (EXPERIMENTAL)"
 	depends on NFSD && NFSD_V3 && EXPERIMENTAL
+	select FS_POSIX_ACL
 	select RPCSEC_GSS_KRB5
 	help
-	  If you would like to include the NFSv4 server as well as the NFSv2
-	  and NFSv3 servers, say Y here.  This feature is experimental, and
-	  should only be used if you are interested in helping to test NFSv4.
-	  If unsure, say N.
+	  This option enables support in your system's NFS server for
+	  version 4 of the NFS protocol (RFC 3530).
 
-config NFSD_TCP
-	bool "Provide NFS server over TCP support"
-	depends on NFSD
-	default y
-	help
-	  If you want your NFS server to support TCP connections, say Y here.
-	  TCP connections usually perform better than the default UDP when
-	  the network is lossy or congested.  If unsure, say Y.
+	  To export files using NFSv4, you need to install additional 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"
diff --git a/fs/lockd/host.c b/fs/lockd/host.c
index f23750db1650..a17664c7eacc 100644
--- a/fs/lockd/host.c
+++ b/fs/lockd/host.c
@@ -19,12 +19,11 @@
 
 
 #define NLMDBG_FACILITY		NLMDBG_HOSTCACHE
-#define NLM_HOST_MAX		64
 #define NLM_HOST_NRHASH		32
 #define NLM_ADDRHASH(addr)	(ntohl(addr) & (NLM_HOST_NRHASH-1))
 #define NLM_HOST_REBIND		(60 * HZ)
-#define NLM_HOST_EXPIRE		((nrhosts > NLM_HOST_MAX)? 300 * HZ : 120 * HZ)
-#define NLM_HOST_COLLECT	((nrhosts > NLM_HOST_MAX)? 120 * HZ :  60 * HZ)
+#define NLM_HOST_EXPIRE		(300 * HZ)
+#define NLM_HOST_COLLECT	(120 * HZ)
 
 static struct hlist_head	nlm_hosts[NLM_HOST_NRHASH];
 static unsigned long		next_gc;
@@ -143,9 +142,7 @@ static struct nlm_host *nlm_lookup_host(int server,
 	INIT_LIST_HEAD(&host->h_granted);
 	INIT_LIST_HEAD(&host->h_reclaim);
 
-	if (++nrhosts > NLM_HOST_MAX)
-		next_gc = 0;
-
+	nrhosts++;
 out:
 	mutex_unlock(&nlm_host_mutex);
 	return host;
@@ -462,7 +459,7 @@ nlm_gc_hosts(void)
  * Manage NSM handles
  */
 static LIST_HEAD(nsm_handles);
-static DEFINE_MUTEX(nsm_mutex);
+static DEFINE_SPINLOCK(nsm_lock);
 
 static struct nsm_handle *
 __nsm_find(const struct sockaddr_in *sin,
@@ -470,7 +467,7 @@ __nsm_find(const struct sockaddr_in *sin,
 		int create)
 {
 	struct nsm_handle *nsm = NULL;
-	struct list_head *pos;
+	struct nsm_handle *pos;
 
 	if (!sin)
 		return NULL;
@@ -484,38 +481,43 @@ __nsm_find(const struct sockaddr_in *sin,
 		return NULL;
 	}
 
-	mutex_lock(&nsm_mutex);
-	list_for_each(pos, &nsm_handles) {
-		nsm = list_entry(pos, struct nsm_handle, sm_link);
+retry:
+	spin_lock(&nsm_lock);
+	list_for_each_entry(pos, &nsm_handles, sm_link) {
 
 		if (hostname && nsm_use_hostnames) {
-			if (strlen(nsm->sm_name) != hostname_len
-			 || memcmp(nsm->sm_name, hostname, hostname_len))
+			if (strlen(pos->sm_name) != hostname_len
+			 || memcmp(pos->sm_name, hostname, hostname_len))
 				continue;
-		} else if (!nlm_cmp_addr(&nsm->sm_addr, sin))
+		} else if (!nlm_cmp_addr(&pos->sm_addr, sin))
 			continue;
-		atomic_inc(&nsm->sm_count);
-		goto out;
+		atomic_inc(&pos->sm_count);
+		kfree(nsm);
+		nsm = pos;
+		goto found;
 	}
-
-	if (!create) {
-		nsm = NULL;
-		goto out;
+	if (nsm) {
+		list_add(&nsm->sm_link, &nsm_handles);
+		goto found;
 	}
+	spin_unlock(&nsm_lock);
+
+	if (!create)
+		return NULL;
 
 	nsm = kzalloc(sizeof(*nsm) + hostname_len + 1, GFP_KERNEL);
-	if (nsm != NULL) {
-		nsm->sm_addr = *sin;
-		nsm->sm_name = (char *) (nsm + 1);
-		memcpy(nsm->sm_name, hostname, hostname_len);
-		nsm->sm_name[hostname_len] = '\0';
-		atomic_set(&nsm->sm_count, 1);
+	if (nsm == NULL)
+		return NULL;
 
-		list_add(&nsm->sm_link, &nsm_handles);
-	}
+	nsm->sm_addr = *sin;
+	nsm->sm_name = (char *) (nsm + 1);
+	memcpy(nsm->sm_name, hostname, hostname_len);
+	nsm->sm_name[hostname_len] = '\0';
+	atomic_set(&nsm->sm_count, 1);
+	goto retry;
 
-out:
-	mutex_unlock(&nsm_mutex);
+found:
+	spin_unlock(&nsm_lock);
 	return nsm;
 }
 
@@ -534,12 +536,9 @@ nsm_release(struct nsm_handle *nsm)
 {
 	if (!nsm)
 		return;
-	if (atomic_dec_and_test(&nsm->sm_count)) {
-		mutex_lock(&nsm_mutex);
-		if (atomic_read(&nsm->sm_count) == 0) {
-			list_del(&nsm->sm_link);
-			kfree(nsm);
-		}
-		mutex_unlock(&nsm_mutex);
+	if (atomic_dec_and_lock(&nsm->sm_count, &nsm_lock)) {
+		list_del(&nsm->sm_link);
+		spin_unlock(&nsm_lock);
+		kfree(nsm);
 	}
 }
diff --git a/fs/lockd/svc.c b/fs/lockd/svc.c
index 38c2f0b1dd7d..513a1863d8ba 100644
--- a/fs/lockd/svc.c
+++ b/fs/lockd/svc.c
@@ -25,6 +25,7 @@
 #include <linux/smp.h>
 #include <linux/smp_lock.h>
 #include <linux/mutex.h>
+#include <linux/kthread.h>
 #include <linux/freezer.h>
 
 #include <linux/sunrpc/types.h>
@@ -48,14 +49,11 @@ EXPORT_SYMBOL(nlmsvc_ops);
 
 static DEFINE_MUTEX(nlmsvc_mutex);
 static unsigned int		nlmsvc_users;
-static pid_t			nlmsvc_pid;
+static struct task_struct	*nlmsvc_task;
 static struct svc_serv		*nlmsvc_serv;
 int				nlmsvc_grace_period;
 unsigned long			nlmsvc_timeout;
 
-static DECLARE_COMPLETION(lockd_start_done);
-static DECLARE_WAIT_QUEUE_HEAD(lockd_exit);
-
 /*
  * These can be set at insmod time (useful for NFS as root filesystem),
  * and also changed through the sysctl interface.  -- Jamie Lokier, Aug 2003
@@ -113,35 +111,30 @@ static inline void clear_grace_period(void)
 /*
  * This is the lockd kernel thread
  */
-static void
-lockd(struct svc_rqst *rqstp)
+static int
+lockd(void *vrqstp)
 {
 	int		err = 0;
+	struct svc_rqst *rqstp = vrqstp;
 	unsigned long grace_period_expire;
 
-	/* Lock module and set up kernel thread */
-	/* lockd_up is waiting for us to startup, so will
-	 * be holding a reference to this module, so it
-	 * is safe to just claim another reference
-	 */
-	__module_get(THIS_MODULE);
-	lock_kernel();
-
-	/*
-	 * Let our maker know we're running.
-	 */
-	nlmsvc_pid = current->pid;
-	nlmsvc_serv = rqstp->rq_server;
-	complete(&lockd_start_done);
-
-	daemonize("lockd");
+	/* try_to_freeze() is called from svc_recv() */
 	set_freezable();
 
-	/* Process request with signals blocked, but allow SIGKILL.  */
+	/* Allow SIGKILL to tell lockd to drop all of its locks */
 	allow_signal(SIGKILL);
 
 	dprintk("NFS locking service started (ver " LOCKD_VERSION ").\n");
 
+	/*
+	 * FIXME: it would be nice if lockd didn't spend its entire life
+	 * running under the BKL. At the very least, it would be good to
+	 * have someone clarify what it's intended to protect here. I've
+	 * seen some handwavy posts about posix locking needing to be
+	 * done under the BKL, but it's far from clear.
+	 */
+	lock_kernel();
+
 	if (!nlm_timeout)
 		nlm_timeout = LOCKD_DFLT_TIMEO;
 	nlmsvc_timeout = nlm_timeout * HZ;
@@ -150,10 +143,9 @@ lockd(struct svc_rqst *rqstp)
 
 	/*
 	 * The main request loop. We don't terminate until the last
-	 * NFS mount or NFS daemon has gone away, and we've been sent a
-	 * signal, or else another process has taken over our job.
+	 * NFS mount or NFS daemon has gone away.
 	 */
-	while ((nlmsvc_users || !signalled()) && nlmsvc_pid == current->pid) {
+	while (!kthread_should_stop()) {
 		long timeout = MAX_SCHEDULE_TIMEOUT;
 		RPC_IFDEBUG(char buf[RPC_MAX_ADDRBUFLEN]);
 
@@ -163,6 +155,7 @@ lockd(struct svc_rqst *rqstp)
 				nlmsvc_invalidate_all();
 				grace_period_expire = set_grace_period();
 			}
+			continue;
 		}
 
 		/*
@@ -197,28 +190,19 @@ lockd(struct svc_rqst *rqstp)
 	}
 
 	flush_signals(current);
+	if (nlmsvc_ops)
+		nlmsvc_invalidate_all();
+	nlm_shutdown_hosts();
 
-	/*
-	 * Check whether there's a new lockd process before
-	 * shutting down the hosts and clearing the slot.
-	 */
-	if (!nlmsvc_pid || current->pid == nlmsvc_pid) {
-		if (nlmsvc_ops)
-			nlmsvc_invalidate_all();
-		nlm_shutdown_hosts();
-		nlmsvc_pid = 0;
-		nlmsvc_serv = NULL;
-	} else
-		printk(KERN_DEBUG
-			"lockd: new process, skipping host shutdown\n");
-	wake_up(&lockd_exit);
+	unlock_kernel();
+
+	nlmsvc_task = NULL;
+	nlmsvc_serv = NULL;
 
 	/* Exit the RPC thread */
 	svc_exit_thread(rqstp);
 
-	/* Release module */
-	unlock_kernel();
-	module_put_and_exit(0);
+	return 0;
 }
 
 /*
@@ -263,14 +247,15 @@ static int make_socks(struct svc_serv *serv, int proto)
 int
 lockd_up(int proto) /* Maybe add a 'family' option when IPv6 is supported ?? */
 {
-	struct svc_serv *	serv;
-	int			error = 0;
+	struct svc_serv *serv;
+	struct svc_rqst *rqstp;
+	int		error = 0;
 
 	mutex_lock(&nlmsvc_mutex);
 	/*
 	 * Check whether we're already up and running.
 	 */
-	if (nlmsvc_pid) {
+	if (nlmsvc_serv) {
 		if (proto)
 			error = make_socks(nlmsvc_serv, proto);
 		goto out;
@@ -297,13 +282,28 @@ lockd_up(int proto) /* Maybe add a 'family' option when IPv6 is supported ?? */
 	/*
 	 * Create the kernel thread and wait for it to start.
 	 */
-	error = svc_create_thread(lockd, serv);
-	if (error) {
+	rqstp = svc_prepare_thread(serv, &serv->sv_pools[0]);
+	if (IS_ERR(rqstp)) {
+		error = PTR_ERR(rqstp);
 		printk(KERN_WARNING
-			"lockd_up: create thread failed, error=%d\n", error);
+			"lockd_up: svc_rqst allocation failed, error=%d\n",
+			error);
+		goto destroy_and_out;
+	}
+
+	svc_sock_update_bufs(serv);
+	nlmsvc_serv = rqstp->rq_server;
+
+	nlmsvc_task = kthread_run(lockd, rqstp, serv->sv_name);
+	if (IS_ERR(nlmsvc_task)) {
+		error = PTR_ERR(nlmsvc_task);
+		nlmsvc_task = NULL;
+		nlmsvc_serv = NULL;
+		printk(KERN_WARNING
+			"lockd_up: kthread_run failed, error=%d\n", error);
+		svc_exit_thread(rqstp);
 		goto destroy_and_out;
 	}
-	wait_for_completion(&lockd_start_done);
 
 	/*
 	 * Note: svc_serv structures have an initial use count of 1,
@@ -325,37 +325,21 @@ EXPORT_SYMBOL(lockd_up);
 void
 lockd_down(void)
 {
-	static int warned;
-
 	mutex_lock(&nlmsvc_mutex);
 	if (nlmsvc_users) {
 		if (--nlmsvc_users)
 			goto out;
-	} else
-		printk(KERN_WARNING "lockd_down: no users! pid=%d\n", nlmsvc_pid);
-
-	if (!nlmsvc_pid) {
-		if (warned++ == 0)
-			printk(KERN_WARNING "lockd_down: no lockd running.\n"); 
-		goto out;
+	} else {
+		printk(KERN_ERR "lockd_down: no users! task=%p\n",
+			nlmsvc_task);
+		BUG();
 	}
-	warned = 0;
 
-	kill_proc(nlmsvc_pid, SIGKILL, 1);
-	/*
-	 * Wait for the lockd process to exit, but since we're holding
-	 * the lockd semaphore, we can't wait around forever ...
-	 */
-	clear_thread_flag(TIF_SIGPENDING);
-	interruptible_sleep_on_timeout(&lockd_exit, HZ);
-	if (nlmsvc_pid) {
-		printk(KERN_WARNING 
-			"lockd_down: lockd failed to exit, clearing pid\n");
-		nlmsvc_pid = 0;
+	if (!nlmsvc_task) {
+		printk(KERN_ERR "lockd_down: no lockd running.\n");
+		BUG();
 	}
-	spin_lock_irq(&current->sighand->siglock);
-	recalc_sigpending();
-	spin_unlock_irq(&current->sighand->siglock);
+	kthread_stop(nlmsvc_task);
 out:
 	mutex_unlock(&nlmsvc_mutex);
 }
diff --git a/fs/lockd/svclock.c b/fs/lockd/svclock.c
index fe9bdb4a220c..4da7c4c27064 100644
--- a/fs/lockd/svclock.c
+++ b/fs/lockd/svclock.c
@@ -29,6 +29,7 @@
 #include <linux/sunrpc/svc.h>
 #include <linux/lockd/nlm.h>
 #include <linux/lockd/lockd.h>
+#include <linux/kthread.h>
 
 #define NLMDBG_FACILITY		NLMDBG_SVCLOCK
 
@@ -887,7 +888,7 @@ nlmsvc_retry_blocked(void)
 	unsigned long	timeout = MAX_SCHEDULE_TIMEOUT;
 	struct nlm_block *block;
 
-	while (!list_empty(&nlm_blocked)) {
+	while (!list_empty(&nlm_blocked) && !kthread_should_stop()) {
 		block = list_entry(nlm_blocked.next, struct nlm_block, b_list);
 
 		if (block->b_when == NLM_NEVER)
diff --git a/fs/lockd/svcshare.c b/fs/lockd/svcshare.c
index 068886de4dda..b0ae07008700 100644
--- a/fs/lockd/svcshare.c
+++ b/fs/lockd/svcshare.c
@@ -71,7 +71,8 @@ nlmsvc_unshare_file(struct nlm_host *host, struct nlm_file *file,
 	struct nlm_share	*share, **shpp;
 	struct xdr_netobj	*oh = &argp->lock.oh;
 
-	for (shpp = &file->f_shares; (share = *shpp) != 0; shpp = &share->s_next) {
+	for (shpp = &file->f_shares; (share = *shpp) != NULL;
+					shpp = &share->s_next) {
 		if (share->s_host == host && nlm_cmp_owner(share, oh)) {
 			*shpp = share->s_next;
 			kfree(share);
diff --git a/fs/nfs/callback.c b/fs/nfs/callback.c
index 66648dd92d97..2e5de77ff030 100644
--- a/fs/nfs/callback.c
+++ b/fs/nfs/callback.c
@@ -15,6 +15,7 @@
 #include <linux/nfs_fs.h>
 #include <linux/mutex.h>
 #include <linux/freezer.h>
+#include <linux/kthread.h>
 
 #include <net/inet_sock.h>
 
@@ -27,9 +28,7 @@
 struct nfs_callback_data {
 	unsigned int users;
 	struct svc_serv *serv;
-	pid_t pid;
-	struct completion started;
-	struct completion stopped;
+	struct task_struct *task;
 };
 
 static struct nfs_callback_data nfs_callback_info;
@@ -57,27 +56,20 @@ module_param_call(callback_tcpport, param_set_port, param_get_int,
 /*
  * This is the callback kernel thread.
  */
-static void nfs_callback_svc(struct svc_rqst *rqstp)
+static int
+nfs_callback_svc(void *vrqstp)
 {
 	int err;
+	struct svc_rqst *rqstp = vrqstp;
 
-	__module_get(THIS_MODULE);
-	lock_kernel();
-
-	nfs_callback_info.pid = current->pid;
-	daemonize("nfsv4-svc");
-	/* Process request with signals blocked, but allow SIGKILL.  */
-	allow_signal(SIGKILL);
 	set_freezable();
 
-	complete(&nfs_callback_info.started);
-
-	for(;;) {
-		if (signalled()) {
-			if (nfs_callback_info.users == 0)
-				break;
-			flush_signals(current);
-		}
+	/*
+	 * FIXME: do we really need to run this under the BKL? If so, please
+	 * add a comment about what it's intended to protect.
+	 */
+	lock_kernel();
+	while (!kthread_should_stop()) {
 		/*
 		 * Listen for a request on the socket
 		 */
@@ -92,13 +84,10 @@ static void nfs_callback_svc(struct svc_rqst *rqstp)
 		}
 		svc_process(rqstp);
 	}
-
-	flush_signals(current);
-	svc_exit_thread(rqstp);
-	nfs_callback_info.pid = 0;
-	complete(&nfs_callback_info.stopped);
 	unlock_kernel();
-	module_put_and_exit(0);
+	nfs_callback_info.task = NULL;
+	svc_exit_thread(rqstp);
+	return 0;
 }
 
 /*
@@ -107,14 +96,13 @@ static void nfs_callback_svc(struct svc_rqst *rqstp)
 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.pid != 0)
+	if (nfs_callback_info.users++ || nfs_callback_info.task != NULL)
 		goto out;
-	init_completion(&nfs_callback_info.started);
-	init_completion(&nfs_callback_info.stopped);
 	serv = svc_create(&nfs4_callback_program, NFS4_CALLBACK_BUFSIZE, NULL);
 	ret = -ENOMEM;
 	if (!serv)
@@ -127,15 +115,28 @@ int nfs_callback_up(void)
 	nfs_callback_tcpport = ret;
 	dprintk("Callback port = 0x%x\n", nfs_callback_tcpport);
 
-	ret = svc_create_thread(nfs_callback_svc, serv);
-	if (ret < 0)
+	rqstp = svc_prepare_thread(serv, &serv->sv_pools[0]);
+	if (IS_ERR(rqstp)) {
+		ret = PTR_ERR(rqstp);
 		goto out_err;
+	}
+
+	svc_sock_update_bufs(serv);
 	nfs_callback_info.serv = serv;
-	wait_for_completion(&nfs_callback_info.started);
+
+	nfs_callback_info.task = kthread_run(nfs_callback_svc, rqstp,
+					     "nfsv4-svc");
+	if (IS_ERR(nfs_callback_info.task)) {
+		ret = PTR_ERR(nfs_callback_info.task);
+		nfs_callback_info.serv = NULL;
+		nfs_callback_info.task = NULL;
+		svc_exit_thread(rqstp);
+		goto out_err;
+	}
 out:
 	/*
 	 * svc_create creates the svc_serv with sv_nrthreads == 1, and then
-	 * svc_create_thread increments that. So we need to call svc_destroy
+	 * svc_prepare_thread increments that. So we need to call svc_destroy
 	 * on both success and failure so that the refcount is 1 when the
 	 * thread exits.
 	 */
@@ -159,12 +160,8 @@ void nfs_callback_down(void)
 	lock_kernel();
 	mutex_lock(&nfs_callback_mutex);
 	nfs_callback_info.users--;
-	do {
-		if (nfs_callback_info.users != 0 || nfs_callback_info.pid == 0)
-			break;
-		if (kill_proc(nfs_callback_info.pid, SIGKILL, 1) < 0)
-			break;
-	} while (wait_for_completion_timeout(&nfs_callback_info.stopped, 5*HZ) == 0);
+	if (nfs_callback_info.users == 0 && nfs_callback_info.task != NULL)
+		kthread_stop(nfs_callback_info.task);
 	mutex_unlock(&nfs_callback_mutex);
 	unlock_kernel();
 }
diff --git a/fs/nfs/symlink.c b/fs/nfs/symlink.c
index 83e865a16ad1..412738dbfbc7 100644
--- a/fs/nfs/symlink.c
+++ b/fs/nfs/symlink.c
@@ -10,7 +10,6 @@
  *  nfs symlink handling code
  */
 
-#define NFS_NEED_XDR_TYPES
 #include <linux/time.h>
 #include <linux/errno.h>
 #include <linux/sunrpc/clnt.h>
diff --git a/fs/nfsd/auth.c b/fs/nfsd/auth.c
index d13403e33622..294992e9bf69 100644
--- a/fs/nfsd/auth.c
+++ b/fs/nfsd/auth.c
@@ -10,6 +10,7 @@
 #include <linux/sunrpc/svcauth.h>
 #include <linux/nfsd/nfsd.h>
 #include <linux/nfsd/export.h>
+#include "auth.h"
 
 int nfsexp_flags(struct svc_rqst *rqstp, struct svc_export *exp)
 {
diff --git a/fs/nfsd/export.c b/fs/nfsd/export.c
index 8a6f7c924c75..33bfcf09db46 100644
--- a/fs/nfsd/export.c
+++ b/fs/nfsd/export.c
@@ -35,6 +35,7 @@
 #include <linux/lockd/bind.h>
 #include <linux/sunrpc/msg_prot.h>
 #include <linux/sunrpc/gss_api.h>
+#include <net/ipv6.h>
 
 #define NFSDDBG_FACILITY	NFSDDBG_EXPORT
 
@@ -1548,6 +1549,7 @@ exp_addclient(struct nfsctl_client *ncp)
 {
 	struct auth_domain	*dom;
 	int			i, err;
+	struct in6_addr addr6;
 
 	/* First, consistency check. */
 	err = -EINVAL;
@@ -1566,9 +1568,10 @@ exp_addclient(struct nfsctl_client *ncp)
 		goto out_unlock;
 
 	/* Insert client into hashtable. */
-	for (i = 0; i < ncp->cl_naddr; i++)
-		auth_unix_add_addr(ncp->cl_addrlist[i], dom);
-
+	for (i = 0; i < ncp->cl_naddr; i++) {
+		ipv6_addr_set_v4mapped(ncp->cl_addrlist[i].s_addr, &addr6);
+		auth_unix_add_addr(&addr6, dom);
+	}
 	auth_unix_forget_old(dom);
 	auth_domain_put(dom);
 
diff --git a/fs/nfsd/nfs4idmap.c b/fs/nfsd/nfs4idmap.c
index 996bd88b75ba..5b398421b051 100644
--- a/fs/nfsd/nfs4idmap.c
+++ b/fs/nfsd/nfs4idmap.c
@@ -202,7 +202,7 @@ static struct cache_detail idtoname_cache = {
 	.alloc		= ent_alloc,
 };
 
-int
+static int
 idtoname_parse(struct cache_detail *cd, char *buf, int buflen)
 {
 	struct ent ent, *res;
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index bcb97d8e8b8b..b98b12fcc3eb 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -1638,6 +1638,7 @@ nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_sta
 	locks_init_lock(&fl);
 	fl.fl_lmops = &nfsd_lease_mng_ops;
 	fl.fl_flags = FL_LEASE;
+	fl.fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK;
 	fl.fl_end = OFFSET_MAX;
 	fl.fl_owner =  (fl_owner_t)dp;
 	fl.fl_file = stp->st_vfs_file;
@@ -1646,8 +1647,7 @@ nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_sta
 	/* vfs_setlease checks to see if delegation should be handed out.
 	 * the lock_manager callbacks fl_mylease and fl_change are used
 	 */
-	if ((status = vfs_setlease(stp->st_vfs_file,
-		flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK, &flp))) {
+	if ((status = vfs_setlease(stp->st_vfs_file, fl.fl_type, &flp))) {
 		dprintk("NFSD: setlease failed [%d], no delegation\n", status);
 		unhash_delegation(dp);
 		flag = NFS4_OPEN_DELEGATE_NONE;
@@ -1762,10 +1762,6 @@ out:
 	return status;
 }
 
-static struct workqueue_struct *laundry_wq;
-static void laundromat_main(struct work_struct *);
-static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main);
-
 __be32
 nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 	    clientid_t *clid)
@@ -1873,7 +1869,11 @@ nfs4_laundromat(void)
 	return clientid_val;
 }
 
-void
+static struct workqueue_struct *laundry_wq;
+static void laundromat_main(struct work_struct *);
+static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main);
+
+static void
 laundromat_main(struct work_struct *not_used)
 {
 	time_t t;
@@ -1974,6 +1974,26 @@ io_during_grace_disallowed(struct inode *inode, int flags)
 		&& mandatory_lock(inode);
 }
 
+static int check_stateid_generation(stateid_t *in, stateid_t *ref)
+{
+	/* If the client sends us a stateid from the future, it's buggy: */
+	if (in->si_generation > ref->si_generation)
+		return nfserr_bad_stateid;
+	/*
+	 * The following, however, can happen.  For example, if the
+	 * client sends an open and some IO at the same time, the open
+	 * may bump si_generation while the IO is still in flight.
+	 * Thanks to hard links and renames, the client never knows what
+	 * file an open will affect.  So it could avoid that situation
+	 * only by serializing all opens and IO from the same open
+	 * owner.  To recover from the old_stateid error, the client
+	 * will just have to retry the IO:
+	 */
+	if (in->si_generation < ref->si_generation)
+		return nfserr_old_stateid;
+	return nfs_ok;
+}
+
 /*
 * Checks for stateid operations
 */
@@ -2022,12 +2042,8 @@ nfs4_preprocess_stateid_op(struct svc_fh *current_fh, stateid_t *stateid, int fl
 			goto out;
 		stidp = &stp->st_stateid;
 	}
-	if (stateid->si_generation > stidp->si_generation)
-		goto out;
-
-	/* OLD STATEID */
-	status = nfserr_old_stateid;
-	if (stateid->si_generation < stidp->si_generation)
+	status = check_stateid_generation(stateid, stidp);
+	if (status)
 		goto out;
 	if (stp) {
 		if ((status = nfs4_check_openmode(stp,flags)))
@@ -2035,7 +2051,7 @@ nfs4_preprocess_stateid_op(struct svc_fh *current_fh, stateid_t *stateid, int fl
 		renew_client(stp->st_stateowner->so_client);
 		if (filpp)
 			*filpp = stp->st_vfs_file;
-	} else if (dp) {
+	} else {
 		if ((status = nfs4_check_delegmode(dp, flags)))
 			goto out;
 		renew_client(dp->dl_client);
@@ -2064,6 +2080,7 @@ nfs4_preprocess_seqid_op(struct svc_fh *current_fh, u32 seqid, stateid_t *statei
 {
 	struct nfs4_stateid *stp;
 	struct nfs4_stateowner *sop;
+	__be32 status;
 
 	dprintk("NFSD: preprocess_seqid_op: seqid=%d " 
 			"stateid = (%08x/%08x/%08x/%08x)\n", seqid,
@@ -2126,7 +2143,7 @@ nfs4_preprocess_seqid_op(struct svc_fh *current_fh, u32 seqid, stateid_t *statei
                }
 	}
 
-	if ((flags & CHECK_FH) && nfs4_check_fh(current_fh, stp)) {
+	if (nfs4_check_fh(current_fh, stp)) {
 		dprintk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n");
 		return nfserr_bad_stateid;
 	}
@@ -2149,15 +2166,9 @@ nfs4_preprocess_seqid_op(struct svc_fh *current_fh, u32 seqid, stateid_t *statei
 				" confirmed yet!\n");
 		return nfserr_bad_stateid;
 	}
-	if (stateid->si_generation > stp->st_stateid.si_generation) {
-		dprintk("NFSD: preprocess_seqid_op: future stateid?!\n");
-		return nfserr_bad_stateid;
-	}
-
-	if (stateid->si_generation < stp->st_stateid.si_generation) {
-		dprintk("NFSD: preprocess_seqid_op: old stateid!\n");
-		return nfserr_old_stateid;
-	}
+	status = check_stateid_generation(stateid, &stp->st_stateid);
+	if (status)
+		return status;
 	renew_client(sop->so_client);
 	return nfs_ok;
 
@@ -2193,7 +2204,7 @@ nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 
 	if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh,
 					oc->oc_seqid, &oc->oc_req_stateid,
-					CHECK_FH | CONFIRM | OPEN_STATE,
+					CONFIRM | OPEN_STATE,
 					&oc->oc_stateowner, &stp, NULL)))
 		goto out; 
 
@@ -2264,7 +2275,7 @@ nfsd4_open_downgrade(struct svc_rqst *rqstp,
 	if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh,
 					od->od_seqid,
 					&od->od_stateid, 
-					CHECK_FH | OPEN_STATE, 
+					OPEN_STATE,
 					&od->od_stateowner, &stp, NULL)))
 		goto out; 
 
@@ -2317,7 +2328,7 @@ nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 	if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh,
 					close->cl_seqid,
 					&close->cl_stateid, 
-					CHECK_FH | OPEN_STATE | CLOSE_STATE,
+					OPEN_STATE | CLOSE_STATE,
 					&close->cl_stateowner, &stp, NULL)))
 		goto out; 
 	status = nfs_ok;
@@ -2622,7 +2633,7 @@ nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 		status = nfs4_preprocess_seqid_op(&cstate->current_fh,
 				        lock->lk_new_open_seqid,
 		                        &lock->lk_new_open_stateid,
-		                        CHECK_FH | OPEN_STATE,
+					OPEN_STATE,
 		                        &lock->lk_replay_owner, &open_stp,
 					lock);
 		if (status)
@@ -2649,7 +2660,7 @@ nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 		status = nfs4_preprocess_seqid_op(&cstate->current_fh,
 				       lock->lk_old_lock_seqid, 
 				       &lock->lk_old_lock_stateid, 
-				       CHECK_FH | LOCK_STATE, 
+				       LOCK_STATE,
 				       &lock->lk_replay_owner, &lock_stp, lock);
 		if (status)
 			goto out;
@@ -2846,7 +2857,7 @@ nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 	if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh,
 					locku->lu_seqid, 
 					&locku->lu_stateid, 
-					CHECK_FH | LOCK_STATE, 
+					LOCK_STATE,
 					&locku->lu_stateowner, &stp, NULL)))
 		goto out;
 
diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
index 0e6a179eccaf..1ba7ad981935 100644
--- a/fs/nfsd/nfs4xdr.c
+++ b/fs/nfsd/nfs4xdr.c
@@ -1867,6 +1867,15 @@ out_serverfault:
 	goto out;
 }
 
+static inline int attributes_need_mount(u32 *bmval)
+{
+	if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
+		return 1;
+	if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
+		return 1;
+	return 0;
+}
+
 static __be32
 nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
 		const char *name, int namlen, __be32 *p, int *buflen)
@@ -1888,9 +1897,7 @@ nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
 	 * we will not follow the cross mount and will fill the attribtutes
 	 * directly from the mountpoint dentry.
 	 */
-	if (d_mountpoint(dentry) &&
-	    (cd->rd_bmval[0] & ~FATTR4_WORD0_RDATTR_ERROR) == 0 &&
-	    (cd->rd_bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID) == 0)
+	if (d_mountpoint(dentry) && !attributes_need_mount(cd->rd_bmval))
 		ignore_crossmnt = 1;
 	else if (d_mountpoint(dentry)) {
 		int err;
diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c
index 8516137cdbb0..613bcb8171a5 100644
--- a/fs/nfsd/nfsctl.c
+++ b/fs/nfsd/nfsctl.c
@@ -37,6 +37,7 @@
 #include <linux/nfsd/syscall.h>
 
 #include <asm/uaccess.h>
+#include <net/ipv6.h>
 
 /*
  *	We have a single directory with 9 nodes in it.
@@ -149,7 +150,6 @@ static const struct file_operations transaction_ops = {
 	.release	= simple_transaction_release,
 };
 
-extern struct seq_operations nfs_exports_op;
 static int exports_open(struct inode *inode, struct file *file)
 {
 	return seq_open(file, &nfs_exports_op);
@@ -222,6 +222,7 @@ static ssize_t write_getfs(struct file *file, char *buf, size_t size)
 	struct auth_domain *clp;
 	int err = 0;
 	struct knfsd_fh *res;
+	struct in6_addr in6;
 
 	if (size < sizeof(*data))
 		return -EINVAL;
@@ -236,7 +237,11 @@ static ssize_t write_getfs(struct file *file, char *buf, size_t size)
 	res = (struct knfsd_fh*)buf;
 
 	exp_readlock();
-	if (!(clp = auth_unix_lookup(sin->sin_addr)))
+
+	ipv6_addr_set_v4mapped(sin->sin_addr.s_addr, &in6);
+
+	clp = auth_unix_lookup(&in6);
+	if (!clp)
 		err = -EPERM;
 	else {
 		err = exp_rootfh(clp, data->gd_path, res, data->gd_maxlen);
@@ -257,6 +262,7 @@ static ssize_t write_getfd(struct file *file, char *buf, size_t size)
 	int err = 0;
 	struct knfsd_fh fh;
 	char *res;
+	struct in6_addr in6;
 
 	if (size < sizeof(*data))
 		return -EINVAL;
@@ -271,7 +277,11 @@ static ssize_t write_getfd(struct file *file, char *buf, size_t size)
 	res = buf;
 	sin = (struct sockaddr_in *)&data->gd_addr;
 	exp_readlock();
-	if (!(clp = auth_unix_lookup(sin->sin_addr)))
+
+	ipv6_addr_set_v4mapped(sin->sin_addr.s_addr, &in6);
+
+	clp = auth_unix_lookup(&in6);
+	if (!clp)
 		err = -EPERM;
 	else {
 		err = exp_rootfh(clp, data->gd_path, &fh, NFS_FHSIZE);
@@ -347,8 +357,6 @@ static ssize_t write_filehandle(struct file *file, char *buf, size_t size)
 	return mesg - buf;	
 }
 
-extern int nfsd_nrthreads(void);
-
 static ssize_t write_threads(struct file *file, char *buf, size_t size)
 {
 	/* if size > 0, look for a number of threads and call nfsd_svc
@@ -371,10 +379,6 @@ static ssize_t write_threads(struct file *file, char *buf, size_t size)
 	return strlen(buf);
 }
 
-extern int nfsd_nrpools(void);
-extern int nfsd_get_nrthreads(int n, int *);
-extern int nfsd_set_nrthreads(int n, int *);
-
 static ssize_t write_pool_threads(struct file *file, char *buf, size_t size)
 {
 	/* if size > 0, look for an array of number of threads per node
diff --git a/fs/nfsd/nfssvc.c b/fs/nfsd/nfssvc.c
index 9647b0f7bc0c..941041f4b136 100644
--- a/fs/nfsd/nfssvc.c
+++ b/fs/nfsd/nfssvc.c
@@ -244,7 +244,6 @@ static int nfsd_init_socks(int port)
 	if (error < 0)
 		return error;
 
-#ifdef CONFIG_NFSD_TCP
 	error = lockd_up(IPPROTO_TCP);
 	if (error >= 0) {
 		error = svc_create_xprt(nfsd_serv, "tcp", port,
@@ -254,7 +253,6 @@ static int nfsd_init_socks(int port)
 	}
 	if (error < 0)
 		return error;
-#endif
 	return 0;
 }
 
diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c
index 46f59d5365a0..17ac51b5df65 100644
--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@@ -988,7 +988,7 @@ nfsd_vfs_write(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file *file,
 	 * flushing the data to disk is handled separately below.
 	 */
 
-	if (file->f_op->fsync == 0) {/* COMMIT3 cannot work */
+	if (!file->f_op->fsync) {/* COMMIT3 cannot work */
 	       stable = 2;
 	       *stablep = 2; /* FILE_SYNC */
 	}
@@ -1152,7 +1152,7 @@ nfsd_commit(struct svc_rqst *rqstp, struct svc_fh *fhp,
 }
 #endif /* CONFIG_NFSD_V3 */
 
-__be32
+static __be32
 nfsd_create_setattr(struct svc_rqst *rqstp, struct svc_fh *resfhp,
 			struct iattr *iap)
 {
diff --git a/include/linux/nfs3.h b/include/linux/nfs3.h
index 7f11fa589207..539f3b550eab 100644
--- a/include/linux/nfs3.h
+++ b/include/linux/nfs3.h
@@ -96,7 +96,7 @@ struct nfs3_fh {
 #define MOUNTPROC3_UMNTALL	4
  
 
-#if defined(__KERNEL__) || defined(NFS_NEED_KERNEL_TYPES)
+#if defined(__KERNEL__)
 
 /* Number of 32bit words in post_op_attr */
 #define NFS3_POST_OP_ATTR_WORDS		22
diff --git a/include/linux/nfsd/nfsd.h b/include/linux/nfsd/nfsd.h
index 8caf4c4f64e6..f4de14d903a6 100644
--- a/include/linux/nfsd/nfsd.h
+++ b/include/linux/nfsd/nfsd.h
@@ -56,12 +56,20 @@ extern struct svc_program	nfsd_program;
 extern struct svc_version	nfsd_version2, nfsd_version3,
 				nfsd_version4;
 extern struct svc_serv		*nfsd_serv;
+
+extern struct seq_operations nfs_exports_op;
+
 /*
  * Function prototypes.
  */
 int		nfsd_svc(unsigned short port, int nrservs);
 int		nfsd_dispatch(struct svc_rqst *rqstp, __be32 *statp);
 
+int		nfsd_nrthreads(void);
+int		nfsd_nrpools(void);
+int		nfsd_get_nrthreads(int n, int *);
+int		nfsd_set_nrthreads(int n, int *);
+
 /* nfsd/vfs.c */
 int		fh_lock_parent(struct svc_fh *, struct dentry *);
 int		nfsd_racache_init(int);
diff --git a/include/linux/sunrpc/cache.h b/include/linux/sunrpc/cache.h
index 03547d6abee5..2d8b211b9324 100644
--- a/include/linux/sunrpc/cache.h
+++ b/include/linux/sunrpc/cache.h
@@ -120,7 +120,6 @@ struct cache_deferred_req {
 	struct list_head	hash;	/* on hash chain */
 	struct list_head	recent; /* on fifo */
 	struct cache_head	*item;  /* cache item we wait on */
-	time_t			recv_time;
 	void			*owner; /* we might need to discard all defered requests
 					 * owned by someone */
 	void			(*revisit)(struct cache_deferred_req *req,
diff --git a/include/linux/sunrpc/gss_krb5.h b/include/linux/sunrpc/gss_krb5.h
index 5a4b1e0206e3..216738394f64 100644
--- a/include/linux/sunrpc/gss_krb5.h
+++ b/include/linux/sunrpc/gss_krb5.h
@@ -70,8 +70,6 @@ enum seal_alg {
 	SEAL_ALG_DES3KD = 0x0002
 };
 
-#define KRB5_CKSUM_LENGTH 8
-
 #define CKSUMTYPE_CRC32			0x0001
 #define CKSUMTYPE_RSA_MD4		0x0002
 #define CKSUMTYPE_RSA_MD4_DES		0x0003
diff --git a/include/linux/sunrpc/svcauth.h b/include/linux/sunrpc/svcauth.h
index 22e1ef8e200e..d39dbdc7b10f 100644
--- a/include/linux/sunrpc/svcauth.h
+++ b/include/linux/sunrpc/svcauth.h
@@ -24,6 +24,7 @@ struct svc_cred {
 };
 
 struct svc_rqst;		/* forward decl */
+struct in6_addr;
 
 /* Authentication is done in the context of a domain.
  *
@@ -120,10 +121,10 @@ extern void	svc_auth_unregister(rpc_authflavor_t flavor);
 
 extern struct auth_domain *unix_domain_find(char *name);
 extern void auth_domain_put(struct auth_domain *item);
-extern int auth_unix_add_addr(struct in_addr addr, struct auth_domain *dom);
+extern int auth_unix_add_addr(struct in6_addr *addr, struct auth_domain *dom);
 extern struct auth_domain *auth_domain_lookup(char *name, struct auth_domain *new);
 extern struct auth_domain *auth_domain_find(char *name);
-extern struct auth_domain *auth_unix_lookup(struct in_addr addr);
+extern struct auth_domain *auth_unix_lookup(struct in6_addr *addr);
 extern int auth_unix_forget_old(struct auth_domain *dom);
 extern void svcauth_unix_purge(void);
 extern void svcauth_unix_info_release(void *);
diff --git a/include/net/ipv6.h b/include/net/ipv6.h
index c0c019f72ba9..12d94f0ebdc3 100644
--- a/include/net/ipv6.h
+++ b/include/net/ipv6.h
@@ -383,6 +383,15 @@ static inline int ipv6_addr_v4mapped(const struct in6_addr *a)
 		 a->s6_addr32[2] == htonl(0x0000ffff));
 }
 
+static inline void ipv6_addr_set_v4mapped(const __be32 addr,
+					  struct in6_addr *v4mapped)
+{
+	ipv6_addr_set(v4mapped,
+			0, 0,
+			htonl(0x0000FFFF),
+			addr);
+}
+
 /*
  * find the first different bit between two addresses
  * length of address must be a multiple of 32bits
diff --git a/net/sunrpc/auth_gss/gss_krb5_crypto.c b/net/sunrpc/auth_gss/gss_krb5_crypto.c
index 0dd792338fa9..1d52308ca324 100644
--- a/net/sunrpc/auth_gss/gss_krb5_crypto.c
+++ b/net/sunrpc/auth_gss/gss_krb5_crypto.c
@@ -66,8 +66,8 @@ krb5_encrypt(
 		goto out;
 
 	if (crypto_blkcipher_ivsize(tfm) > 16) {
-		dprintk("RPC:       gss_k5encrypt: tfm iv size to large %d\n",
-			 crypto_blkcipher_ivsize(tfm));
+		dprintk("RPC:       gss_k5encrypt: tfm iv size too large %d\n",
+			crypto_blkcipher_ivsize(tfm));
 		goto out;
 	}
 
@@ -102,7 +102,7 @@ krb5_decrypt(
 		goto out;
 
 	if (crypto_blkcipher_ivsize(tfm) > 16) {
-		dprintk("RPC:       gss_k5decrypt: tfm iv size to large %d\n",
+		dprintk("RPC:       gss_k5decrypt: tfm iv size too large %d\n",
 			crypto_blkcipher_ivsize(tfm));
 		goto out;
 	}
diff --git a/net/sunrpc/auth_gss/gss_krb5_seal.c b/net/sunrpc/auth_gss/gss_krb5_seal.c
index dedcbd6108f4..39c08b7e33af 100644
--- a/net/sunrpc/auth_gss/gss_krb5_seal.c
+++ b/net/sunrpc/auth_gss/gss_krb5_seal.c
@@ -109,8 +109,7 @@ gss_get_mic_kerberos(struct gss_ctx *gss_ctx, struct xdr_buf *text,
 			  md5cksum.data, md5cksum.len))
 		return GSS_S_FAILURE;
 
-	memcpy(krb5_hdr + 16, md5cksum.data + md5cksum.len - KRB5_CKSUM_LENGTH,
-	       KRB5_CKSUM_LENGTH);
+	memcpy(krb5_hdr + 16, md5cksum.data + md5cksum.len - 8, 8);
 
 	spin_lock(&krb5_seq_lock);
 	seq_send = ctx->seq_send++;
diff --git a/net/sunrpc/auth_gss/gss_krb5_wrap.c b/net/sunrpc/auth_gss/gss_krb5_wrap.c
index 3bdc527ee64a..3cd99a795d7a 100644
--- a/net/sunrpc/auth_gss/gss_krb5_wrap.c
+++ b/net/sunrpc/auth_gss/gss_krb5_wrap.c
@@ -176,9 +176,7 @@ gss_wrap_kerberos(struct gss_ctx *ctx, int offset,
 	if (krb5_encrypt(kctx->seq, NULL, md5cksum.data,
 			  md5cksum.data, md5cksum.len))
 		return GSS_S_FAILURE;
-	memcpy(krb5_hdr + 16,
-	       md5cksum.data + md5cksum.len - KRB5_CKSUM_LENGTH,
-	       KRB5_CKSUM_LENGTH);
+	memcpy(krb5_hdr + 16, md5cksum.data + md5cksum.len - 8, 8);
 
 	spin_lock(&krb5_seq_lock);
 	seq_send = kctx->seq_send++;
diff --git a/net/sunrpc/auth_gss/svcauth_gss.c b/net/sunrpc/auth_gss/svcauth_gss.c
index 481f984e9a22..5905d56737d6 100644
--- a/net/sunrpc/auth_gss/svcauth_gss.c
+++ b/net/sunrpc/auth_gss/svcauth_gss.c
@@ -1146,7 +1146,7 @@ svcauth_gss_accept(struct svc_rqst *rqstp, __be32 *authp)
 		case RPC_GSS_SVC_INTEGRITY:
 			if (unwrap_integ_data(&rqstp->rq_arg,
 					gc->gc_seq, rsci->mechctx))
-				goto auth_err;
+				goto garbage_args;
 			/* placeholders for length and seq. number: */
 			svc_putnl(resv, 0);
 			svc_putnl(resv, 0);
@@ -1154,7 +1154,7 @@ svcauth_gss_accept(struct svc_rqst *rqstp, __be32 *authp)
 		case RPC_GSS_SVC_PRIVACY:
 			if (unwrap_priv_data(rqstp, &rqstp->rq_arg,
 					gc->gc_seq, rsci->mechctx))
-				goto auth_err;
+				goto garbage_args;
 			/* placeholders for length and seq. number: */
 			svc_putnl(resv, 0);
 			svc_putnl(resv, 0);
@@ -1169,6 +1169,11 @@ svcauth_gss_accept(struct svc_rqst *rqstp, __be32 *authp)
 		ret = SVC_OK;
 		goto out;
 	}
+garbage_args:
+	/* Restore write pointer to its original value: */
+	xdr_ressize_check(rqstp, reject_stat);
+	ret = SVC_GARBAGE;
+	goto out;
 auth_err:
 	/* Restore write pointer to its original value: */
 	xdr_ressize_check(rqstp, reject_stat);
diff --git a/net/sunrpc/cache.c b/net/sunrpc/cache.c
index b5f2786251b9..d75530ff2a6d 100644
--- a/net/sunrpc/cache.c
+++ b/net/sunrpc/cache.c
@@ -571,7 +571,6 @@ static int cache_defer_req(struct cache_req *req, struct cache_head *item)
 		return -ETIMEDOUT;
 
 	dreq->item = item;
-	dreq->recv_time = get_seconds();
 
 	spin_lock(&cache_defer_lock);
 
diff --git a/net/sunrpc/svc.c b/net/sunrpc/svc.c
index a290e1523297..60c9e9260b54 100644
--- a/net/sunrpc/svc.c
+++ b/net/sunrpc/svc.c
@@ -584,7 +584,7 @@ __svc_create_thread(svc_thread_fn func, struct svc_serv *serv,
 	struct svc_rqst	*rqstp;
 	int		error = -ENOMEM;
 	int		have_oldmask = 0;
-	cpumask_t	oldmask;
+	cpumask_t	uninitialized_var(oldmask);
 
 	rqstp = svc_prepare_thread(serv, pool);
 	if (IS_ERR(rqstp)) {
@@ -915,8 +915,7 @@ svc_process(struct svc_rqst *rqstp)
 	case SVC_OK:
 		break;
 	case SVC_GARBAGE:
-		rpc_stat = rpc_garbage_args;
-		goto err_bad;
+		goto err_garbage;
 	case SVC_SYSERR:
 		rpc_stat = rpc_system_err;
 		goto err_bad;
diff --git a/net/sunrpc/svc_xprt.c b/net/sunrpc/svc_xprt.c
index 332eb47539e1..d8e8d79a8451 100644
--- a/net/sunrpc/svc_xprt.c
+++ b/net/sunrpc/svc_xprt.c
@@ -18,6 +18,7 @@
 #include <linux/skbuff.h>
 #include <linux/file.h>
 #include <linux/freezer.h>
+#include <linux/kthread.h>
 #include <net/sock.h>
 #include <net/checksum.h>
 #include <net/ip.h>
@@ -586,8 +587,12 @@ int svc_recv(struct svc_rqst *rqstp, long timeout)
 		while (rqstp->rq_pages[i] == NULL) {
 			struct page *p = alloc_page(GFP_KERNEL);
 			if (!p) {
-				int j = msecs_to_jiffies(500);
-				schedule_timeout_uninterruptible(j);
+				set_current_state(TASK_INTERRUPTIBLE);
+				if (signalled() || kthread_should_stop()) {
+					set_current_state(TASK_RUNNING);
+					return -EINTR;
+				}
+				schedule_timeout(msecs_to_jiffies(500));
 			}
 			rqstp->rq_pages[i] = p;
 		}
@@ -607,7 +612,7 @@ int svc_recv(struct svc_rqst *rqstp, long timeout)
 
 	try_to_freeze();
 	cond_resched();
-	if (signalled())
+	if (signalled() || kthread_should_stop())
 		return -EINTR;
 
 	spin_lock_bh(&pool->sp_lock);
@@ -626,6 +631,20 @@ int svc_recv(struct svc_rqst *rqstp, long timeout)
 		 * to bring down the daemons ...
 		 */
 		set_current_state(TASK_INTERRUPTIBLE);
+
+		/*
+		 * checking kthread_should_stop() here allows us to avoid
+		 * locking and signalling when stopping kthreads that call
+		 * svc_recv. If the thread has already been woken up, then
+		 * we can exit here without sleeping. If not, then it
+		 * it'll be woken up quickly during the schedule_timeout
+		 */
+		if (kthread_should_stop()) {
+			set_current_state(TASK_RUNNING);
+			spin_unlock_bh(&pool->sp_lock);
+			return -EINTR;
+		}
+
 		add_wait_queue(&rqstp->rq_wait, &wait);
 		spin_unlock_bh(&pool->sp_lock);
 
@@ -641,7 +660,10 @@ int svc_recv(struct svc_rqst *rqstp, long timeout)
 			svc_thread_dequeue(pool, rqstp);
 			spin_unlock_bh(&pool->sp_lock);
 			dprintk("svc: server %p, no data yet\n", rqstp);
-			return signalled()? -EINTR : -EAGAIN;
+			if (signalled() || kthread_should_stop())
+				return -EINTR;
+			else
+				return -EAGAIN;
 		}
 	}
 	spin_unlock_bh(&pool->sp_lock);
diff --git a/net/sunrpc/svcauth_unix.c b/net/sunrpc/svcauth_unix.c
index 3c64051e4555..3f30ee6006ae 100644
--- a/net/sunrpc/svcauth_unix.c
+++ b/net/sunrpc/svcauth_unix.c
@@ -11,7 +11,8 @@
 #include <linux/hash.h>
 #include <linux/string.h>
 #include <net/sock.h>
-
+#include <net/ipv6.h>
+#include <linux/kernel.h>
 #define RPCDBG_FACILITY	RPCDBG_AUTH
 
 
@@ -85,7 +86,7 @@ static void svcauth_unix_domain_release(struct auth_domain *dom)
 struct ip_map {
 	struct cache_head	h;
 	char			m_class[8]; /* e.g. "nfsd" */
-	struct in_addr		m_addr;
+	struct in6_addr		m_addr;
 	struct unix_domain	*m_client;
 	int			m_add_change;
 };
@@ -113,12 +114,19 @@ static inline int hash_ip(__be32 ip)
 	return (hash ^ (hash>>8)) & 0xff;
 }
 #endif
+static inline int hash_ip6(struct in6_addr ip)
+{
+	return (hash_ip(ip.s6_addr32[0]) ^
+		hash_ip(ip.s6_addr32[1]) ^
+		hash_ip(ip.s6_addr32[2]) ^
+		hash_ip(ip.s6_addr32[3]));
+}
 static int ip_map_match(struct cache_head *corig, struct cache_head *cnew)
 {
 	struct ip_map *orig = container_of(corig, struct ip_map, h);
 	struct ip_map *new = container_of(cnew, struct ip_map, h);
 	return strcmp(orig->m_class, new->m_class) == 0
-		&& orig->m_addr.s_addr == new->m_addr.s_addr;
+		&& ipv6_addr_equal(&orig->m_addr, &new->m_addr);
 }
 static void ip_map_init(struct cache_head *cnew, struct cache_head *citem)
 {
@@ -126,7 +134,7 @@ static void ip_map_init(struct cache_head *cnew, struct cache_head *citem)
 	struct ip_map *item = container_of(citem, struct ip_map, h);
 
 	strcpy(new->m_class, item->m_class);
-	new->m_addr.s_addr = item->m_addr.s_addr;
+	ipv6_addr_copy(&new->m_addr, &item->m_addr);
 }
 static void update(struct cache_head *cnew, struct cache_head *citem)
 {
@@ -150,22 +158,24 @@ static void ip_map_request(struct cache_detail *cd,
 				  struct cache_head *h,
 				  char **bpp, int *blen)
 {
-	char text_addr[20];
+	char text_addr[40];
 	struct ip_map *im = container_of(h, struct ip_map, h);
-	__be32 addr = im->m_addr.s_addr;
-
-	snprintf(text_addr, 20, "%u.%u.%u.%u",
-		 ntohl(addr) >> 24 & 0xff,
-		 ntohl(addr) >> 16 & 0xff,
-		 ntohl(addr) >>  8 & 0xff,
-		 ntohl(addr) >>  0 & 0xff);
 
+	if (ipv6_addr_v4mapped(&(im->m_addr))) {
+		snprintf(text_addr, 20, NIPQUAD_FMT,
+				ntohl(im->m_addr.s6_addr32[3]) >> 24 & 0xff,
+				ntohl(im->m_addr.s6_addr32[3]) >> 16 & 0xff,
+				ntohl(im->m_addr.s6_addr32[3]) >>  8 & 0xff,
+				ntohl(im->m_addr.s6_addr32[3]) >>  0 & 0xff);
+	} else {
+		snprintf(text_addr, 40, NIP6_FMT, NIP6(im->m_addr));
+	}
 	qword_add(bpp, blen, im->m_class);
 	qword_add(bpp, blen, text_addr);
 	(*bpp)[-1] = '\n';
 }
 
-static struct ip_map *ip_map_lookup(char *class, struct in_addr addr);
+static struct ip_map *ip_map_lookup(char *class, struct in6_addr *addr);
 static int ip_map_update(struct ip_map *ipm, struct unix_domain *udom, time_t expiry);
 
 static int ip_map_parse(struct cache_detail *cd,
@@ -176,10 +186,10 @@ static int ip_map_parse(struct cache_detail *cd,
 	 * for scratch: */
 	char *buf = mesg;
 	int len;
-	int b1,b2,b3,b4;
+	int b1, b2, b3, b4, b5, b6, b7, b8;
 	char c;
 	char class[8];
-	struct in_addr addr;
+	struct in6_addr addr;
 	int err;
 
 	struct ip_map *ipmp;
@@ -198,7 +208,23 @@ static int ip_map_parse(struct cache_detail *cd,
 	len = qword_get(&mesg, buf, mlen);
 	if (len <= 0) return -EINVAL;
 
-	if (sscanf(buf, "%u.%u.%u.%u%c", &b1, &b2, &b3, &b4, &c) != 4)
+	if (sscanf(buf, NIPQUAD_FMT "%c", &b1, &b2, &b3, &b4, &c) == 4) {
+		addr.s6_addr32[0] = 0;
+		addr.s6_addr32[1] = 0;
+		addr.s6_addr32[2] = htonl(0xffff);
+		addr.s6_addr32[3] =
+			htonl((((((b1<<8)|b2)<<8)|b3)<<8)|b4);
+       } else if (sscanf(buf, NIP6_FMT "%c",
+			&b1, &b2, &b3, &b4, &b5, &b6, &b7, &b8, &c) == 8) {
+		addr.s6_addr16[0] = htons(b1);
+		addr.s6_addr16[1] = htons(b2);
+		addr.s6_addr16[2] = htons(b3);
+		addr.s6_addr16[3] = htons(b4);
+		addr.s6_addr16[4] = htons(b5);
+		addr.s6_addr16[5] = htons(b6);
+		addr.s6_addr16[6] = htons(b7);
+		addr.s6_addr16[7] = htons(b8);
+       } else
 		return -EINVAL;
 
 	expiry = get_expiry(&mesg);
@@ -216,10 +242,7 @@ static int ip_map_parse(struct cache_detail *cd,
 	} else
 		dom = NULL;
 
-	addr.s_addr =
-		htonl((((((b1<<8)|b2)<<8)|b3)<<8)|b4);
-
-	ipmp = ip_map_lookup(class,addr);
+	ipmp = ip_map_lookup(class, &addr);
 	if (ipmp) {
 		err = ip_map_update(ipmp,
 			     container_of(dom, struct unix_domain, h),
@@ -239,7 +262,7 @@ static int ip_map_show(struct seq_file *m,
 		       struct cache_head *h)
 {
 	struct ip_map *im;
-	struct in_addr addr;
+	struct in6_addr addr;
 	char *dom = "-no-domain-";
 
 	if (h == NULL) {
@@ -248,20 +271,24 @@ static int ip_map_show(struct seq_file *m,
 	}
 	im = container_of(h, struct ip_map, h);
 	/* class addr domain */
-	addr = im->m_addr;
+	ipv6_addr_copy(&addr, &im->m_addr);
 
 	if (test_bit(CACHE_VALID, &h->flags) &&
 	    !test_bit(CACHE_NEGATIVE, &h->flags))
 		dom = im->m_client->h.name;
 
-	seq_printf(m, "%s %d.%d.%d.%d %s\n",
-		   im->m_class,
-		   ntohl(addr.s_addr) >> 24 & 0xff,
-		   ntohl(addr.s_addr) >> 16 & 0xff,
-		   ntohl(addr.s_addr) >>  8 & 0xff,
-		   ntohl(addr.s_addr) >>  0 & 0xff,
-		   dom
-		   );
+	if (ipv6_addr_v4mapped(&addr)) {
+		seq_printf(m, "%s" NIPQUAD_FMT "%s\n",
+			im->m_class,
+			ntohl(addr.s6_addr32[3]) >> 24 & 0xff,
+			ntohl(addr.s6_addr32[3]) >> 16 & 0xff,
+			ntohl(addr.s6_addr32[3]) >>  8 & 0xff,
+			ntohl(addr.s6_addr32[3]) >>  0 & 0xff,
+			dom);
+	} else {
+		seq_printf(m, "%s" NIP6_FMT "%s\n",
+			im->m_class, NIP6(addr), dom);
+	}
 	return 0;
 }
 
@@ -281,16 +308,16 @@ struct cache_detail ip_map_cache = {
 	.alloc		= ip_map_alloc,
 };
 
-static struct ip_map *ip_map_lookup(char *class, struct in_addr addr)
+static struct ip_map *ip_map_lookup(char *class, struct in6_addr *addr)
 {
 	struct ip_map ip;
 	struct cache_head *ch;
 
 	strcpy(ip.m_class, class);
-	ip.m_addr = addr;
+	ipv6_addr_copy(&ip.m_addr, addr);
 	ch = sunrpc_cache_lookup(&ip_map_cache, &ip.h,
 				 hash_str(class, IP_HASHBITS) ^
-				 hash_ip(addr.s_addr));
+				 hash_ip6(*addr));
 
 	if (ch)
 		return container_of(ch, struct ip_map, h);
@@ -319,14 +346,14 @@ static int ip_map_update(struct ip_map *ipm, struct unix_domain *udom, time_t ex
 	ch = sunrpc_cache_update(&ip_map_cache,
 				 &ip.h, &ipm->h,
 				 hash_str(ipm->m_class, IP_HASHBITS) ^
-				 hash_ip(ipm->m_addr.s_addr));
+				 hash_ip6(ipm->m_addr));
 	if (!ch)
 		return -ENOMEM;
 	cache_put(ch, &ip_map_cache);
 	return 0;
 }
 
-int auth_unix_add_addr(struct in_addr addr, struct auth_domain *dom)
+int auth_unix_add_addr(struct in6_addr *addr, struct auth_domain *dom)
 {
 	struct unix_domain *udom;
 	struct ip_map *ipmp;
@@ -355,7 +382,7 @@ int auth_unix_forget_old(struct auth_domain *dom)
 }
 EXPORT_SYMBOL(auth_unix_forget_old);
 
-struct auth_domain *auth_unix_lookup(struct in_addr addr)
+struct auth_domain *auth_unix_lookup(struct in6_addr *addr)
 {
 	struct ip_map *ipm;
 	struct auth_domain *rv;
@@ -650,9 +677,24 @@ static int unix_gid_find(uid_t uid, struct group_info **gip,
 int
 svcauth_unix_set_client(struct svc_rqst *rqstp)
 {
-	struct sockaddr_in *sin = svc_addr_in(rqstp);
+	struct sockaddr_in *sin;
+	struct sockaddr_in6 *sin6, sin6_storage;
 	struct ip_map *ipm;
 
+	switch (rqstp->rq_addr.ss_family) {
+	case AF_INET:
+		sin = svc_addr_in(rqstp);
+		sin6 = &sin6_storage;
+		ipv6_addr_set(&sin6->sin6_addr, 0, 0,
+				htonl(0x0000FFFF), sin->sin_addr.s_addr);
+		break;
+	case AF_INET6:
+		sin6 = svc_addr_in6(rqstp);
+		break;
+	default:
+		BUG();
+	}
+
 	rqstp->rq_client = NULL;
 	if (rqstp->rq_proc == 0)
 		return SVC_OK;
@@ -660,7 +702,7 @@ svcauth_unix_set_client(struct svc_rqst *rqstp)
 	ipm = ip_map_cached_get(rqstp);
 	if (ipm == NULL)
 		ipm = ip_map_lookup(rqstp->rq_server->sv_program->pg_class,
-				    sin->sin_addr);
+				    &sin6->sin6_addr);
 
 	if (ipm == NULL)
 		return SVC_DENIED;
diff --git a/net/sunrpc/svcsock.c b/net/sunrpc/svcsock.c
index c475977de05a..a45c378250b2 100644
--- a/net/sunrpc/svcsock.c
+++ b/net/sunrpc/svcsock.c
@@ -1101,6 +1101,7 @@ void svc_sock_update_bufs(struct svc_serv *serv)
 	}
 	spin_unlock_bh(&serv->sv_lock);
 }
+EXPORT_SYMBOL(svc_sock_update_bufs);
 
 /*
  * Initialize socket for RPC use and create svc_sock struct
diff --git a/net/sunrpc/xprtrdma/svc_rdma_transport.c b/net/sunrpc/xprtrdma/svc_rdma_transport.c
index 16fd3f6718ff..af408fc12634 100644
--- a/net/sunrpc/xprtrdma/svc_rdma_transport.c
+++ b/net/sunrpc/xprtrdma/svc_rdma_transport.c
@@ -1036,6 +1036,8 @@ int svc_rdma_send(struct svcxprt_rdma *xprt, struct ib_send_wr *wr)
 			wait_event(xprt->sc_send_wait,
 				   atomic_read(&xprt->sc_sq_count) <
 				   xprt->sc_sq_depth);
+			if (test_bit(XPT_CLOSE, &xprt->sc_xprt.xpt_flags))
+				return 0;
 			continue;
 		}
 		/* Bumped used SQ WR count and post */