Merge branch 'for-2.6.28' of git://linux-nfs.org/~bfields/linux

* 'for-2.6.28' of git://linux-nfs.org/~bfields/linux: (59 commits)
  svcrdma: Fix IRD/ORD polarity
  svcrdma: Update svc_rdma_send_error to use DMA LKEY
  svcrdma: Modify the RPC reply path to use FRMR when available
  svcrdma: Modify the RPC recv path to use FRMR when available
  svcrdma: Add support to svc_rdma_send to handle chained WR
  svcrdma: Modify post recv path to use local dma key
  svcrdma: Add a service to register a Fast Reg MR with the device
  svcrdma: Query device for Fast Reg support during connection setup
  svcrdma: Add FRMR get/put services
  NLM: Remove unused argument from svc_addsock() function
  NLM: Remove "proto" argument from lockd_up()
  NLM: Always start both UDP and TCP listeners
  lockd: Remove unused fields in the nlm_reboot structure
  lockd: Add helper to sanity check incoming NOTIFY requests
  lockd: change nlmclnt_grant() to take a "struct sockaddr *"
  lockd: Adjust nlmsvc_lookup_host() to accomodate AF_INET6 addresses
  lockd: Adjust nlmclnt_lookup_host() signature to accomodate non-AF_INET
  lockd: Support non-AF_INET addresses in nlm_lookup_host()
  NLM: Convert nlm_lookup_host() to use a single argument
  svcrdma: Add Fast Reg MR Data Types
  ...

fs/Kconfig

@@ -433,6 +433,14 @@ config FS_POSIX_ACL
 	bool
 	default n
 
+config FILE_LOCKING
+	bool "Enable POSIX file locking API" if EMBEDDED
+	default y
+	help
+	  This option enables standard file locking support, required
+          for filesystems like NFS and for the flock() system
+          call. Disabling this option saves about 11k.
+
 source "fs/xfs/Kconfig"
 source "fs/gfs2/Kconfig"
 
@@ -1779,6 +1787,28 @@ config SUNRPC_XPRT_RDMA
 
 	  If unsure, say N.
 
+config SUNRPC_REGISTER_V4
+	bool "Register local RPC services via rpcbind v4 (EXPERIMENTAL)"
+	depends on SUNRPC && EXPERIMENTAL
+	default n
+	help
+	  Sun added support for registering RPC services at an IPv6
+	  address by creating two new versions of the rpcbind protocol
+	  (RFC 1833).
+
+	  This option enables support in the kernel RPC server for
+	  registering kernel RPC services via version 4 of the rpcbind
+	  protocol.  If you enable this option, you must run a portmapper
+	  daemon that supports rpcbind protocol version 4.
+
+	  Serving NFS over IPv6 from knfsd (the kernel's NFS server)
+	  requires that you enable this option and use a portmapper that
+	  supports rpcbind version 4.
+
+	  If unsure, say N to get traditional behavior (register kernel
+	  RPC services using only rpcbind version 2).  Distributions
+	  using the legacy Linux portmapper daemon must say N here.
+
 config RPCSEC_GSS_KRB5
 	tristate "Secure RPC: Kerberos V mechanism (EXPERIMENTAL)"
 	depends on SUNRPC && EXPERIMENTAL

fs/Makefile

@@ -7,7 +7,7 @@
 
 obj-y :=	open.o read_write.o file_table.o super.o \
 		char_dev.o stat.o exec.o pipe.o namei.o fcntl.o \
-		ioctl.o readdir.o select.o fifo.o locks.o dcache.o inode.o \
+		ioctl.o readdir.o select.o fifo.o dcache.o inode.o \
 		attr.o bad_inode.o file.o filesystems.o namespace.o aio.o \
 		seq_file.o xattr.o libfs.o fs-writeback.o \
 		pnode.o drop_caches.o splice.o sync.o utimes.o \
@@ -27,6 +27,7 @@ obj-$(CONFIG_ANON_INODES)	+= anon_inodes.o
 obj-$(CONFIG_SIGNALFD)		+= signalfd.o
 obj-$(CONFIG_TIMERFD)		+= timerfd.o
 obj-$(CONFIG_EVENTFD)		+= eventfd.o
+obj-$(CONFIG_FILE_LOCKING)      += locks.o
 obj-$(CONFIG_COMPAT)		+= compat.o compat_ioctl.o
 
 nfsd-$(CONFIG_NFSD)		:= nfsctl.o

fs/lockd/Makefile

@@ -5,6 +5,6 @@
 obj-$(CONFIG_LOCKD) += lockd.o
 
 lockd-objs-y := clntlock.o clntproc.o host.o svc.o svclock.o svcshare.o \
-	        svcproc.o svcsubs.o mon.o xdr.o
+	        svcproc.o svcsubs.o mon.o xdr.o grace.o
 lockd-objs-$(CONFIG_LOCKD_V4) += xdr4.o svc4proc.o
 lockd-objs		      := $(lockd-objs-y)

fs/lockd/clntlock.c

@@ -54,14 +54,13 @@ struct nlm_host *nlmclnt_init(const struct nlmclnt_initdata *nlm_init)
 	u32 nlm_version = (nlm_init->nfs_version == 2) ? 1 : 4;
 	int status;
 
-	status = lockd_up(nlm_init->protocol);
+	status = lockd_up();
 	if (status < 0)
 		return ERR_PTR(status);
 
-	host = nlmclnt_lookup_host((struct sockaddr_in *)nlm_init->address,
+	host = nlmclnt_lookup_host(nlm_init->address, nlm_init->addrlen,
 				   nlm_init->protocol, nlm_version,
-				   nlm_init->hostname,
-				   strlen(nlm_init->hostname));
+				   nlm_init->hostname);
 	if (host == NULL) {
 		lockd_down();
 		return ERR_PTR(-ENOLCK);
@@ -142,7 +141,7 @@ int nlmclnt_block(struct nlm_wait *block, struct nlm_rqst *req, long timeout)
 /*
  * The server lockd has called us back to tell us the lock was granted
  */
-__be32 nlmclnt_grant(const struct sockaddr_in *addr, const struct nlm_lock *lock)
+__be32 nlmclnt_grant(const struct sockaddr *addr, const struct nlm_lock *lock)
 {
 	const struct file_lock *fl = &lock->fl;
 	const struct nfs_fh *fh = &lock->fh;
@@ -166,7 +165,7 @@ __be32 nlmclnt_grant(const struct sockaddr_in *addr, const struct nlm_lock *lock
 		 */
 		if (fl_blocked->fl_u.nfs_fl.owner->pid != lock->svid)
 			continue;
-		if (!nlm_cmp_addr(&block->b_host->h_addr, addr))
+		if (!nlm_cmp_addr(nlm_addr(block->b_host), addr))
 			continue;
 		if (nfs_compare_fh(NFS_FH(fl_blocked->fl_file->f_path.dentry->d_inode) ,fh) != 0)
 			continue;
@@ -216,7 +215,7 @@ reclaimer(void *ptr)
 	/* This one ensures that our parent doesn't terminate while the
 	 * reclaim is in progress */
 	lock_kernel();
-	lockd_up(0); /* note: this cannot fail as lockd is already running */
+	lockd_up();	/* note: this cannot fail as lockd is already running */
 
 	dprintk("lockd: reclaiming locks for host %s\n", host->h_name);
 

fs/lockd/grace.c

@@ -0,0 +1,59 @@
+/*
+ * Common code for control of lockd and nfsv4 grace periods.
+ */
+
+#include <linux/module.h>
+#include <linux/lockd/bind.h>
+
+static LIST_HEAD(grace_list);
+static DEFINE_SPINLOCK(grace_lock);
+
+/**
+ * locks_start_grace
+ * @lm: who this grace period is for
+ *
+ * A grace period is a period during which locks should not be given
+ * out.  Currently grace periods are only enforced by the two lock
+ * managers (lockd and nfsd), using the locks_in_grace() function to
+ * check when they are in a grace period.
+ *
+ * This function is called to start a grace period.
+ */
+void locks_start_grace(struct lock_manager *lm)
+{
+	spin_lock(&grace_lock);
+	list_add(&lm->list, &grace_list);
+	spin_unlock(&grace_lock);
+}
+EXPORT_SYMBOL_GPL(locks_start_grace);
+
+/**
+ * locks_end_grace
+ * @lm: who this grace period is for
+ *
+ * Call this function to state that the given lock manager is ready to
+ * resume regular locking.  The grace period will not end until all lock
+ * managers that called locks_start_grace() also call locks_end_grace().
+ * Note that callers count on it being safe to call this more than once,
+ * and the second call should be a no-op.
+ */
+void locks_end_grace(struct lock_manager *lm)
+{
+	spin_lock(&grace_lock);
+	list_del_init(&lm->list);
+	spin_unlock(&grace_lock);
+}
+EXPORT_SYMBOL_GPL(locks_end_grace);
+
+/**
+ * locks_in_grace
+ *
+ * Lock managers call this function to determine when it is OK for them
+ * to answer ordinary lock requests, and when they should accept only
+ * lock reclaims.
+ */
+int locks_in_grace(void)
+{
+	return !list_empty(&grace_list);
+}
+EXPORT_SYMBOL_GPL(locks_in_grace);