Merge git://oss.sgi.com:8090/xfs-2.6

* git://oss.sgi.com:8090/xfs-2.6: (43 commits)
  [XFS] Remove files from the build that are now unused.
  [XFS] Fix a Makefile issue related to exports.o handling.
  [XFS] Remove version 1 directory code.	Never functioned on Linux, just
  [XFS] Map EFSCORRUPTED to an actual error code, not just a made up one
  [XFS] Kill direct access to ->count in valusema(); all we ever use it for
  [XFS] Remove unneeded conditional code on NFS export interface related
  [XFS] Remove an incorrect use of unlikely() on a relatively likely code
  [XFS] Push some common code out of write path into core XFS code for
  [XFS] Remove unnecessary local from open_exec dmapi path.
  [XFS] Minor XFS documentation updates.
  [XFS] Fix broken const use inside local suffix_strtoul routine.
  [XFS] Fix nused counter.  It's currently getting set to -1 rather than
  [XFS] Fix mismerge of the fs_writable cleanup patch causing a freeze/thaw
  [XFS] Fix up debug code so that bulkstat wont generate thousands of
  [XFS] Remove unused parameter from di2xflags routine.
  [XFS] Cleanup a missed porting conversion, and freezing.
  [XFS] Resolve a namespace collision on remaining vtypes for FreeBSD
  [XFS] Resolve a namespace collision on vnode/vnodeops for FreeBSD porters.
  [XFS] Resolve a namespace collision on vfs/vfsops for FreeBSD porters.
  [XFS] statvfs component of directory/project quota support, code
  ...

108 files changed, 2316 insertions, 6261 deletions

diff --git a/fs/xfs/Kconfig b/fs/xfs/Kconfig
index bac27d66151..26b364c9d62 100644
--- a/fs/xfs/Kconfig
+++ b/fs/xfs/Kconfig
@@ -1,6 +1,5 @@
 config XFS_FS
 	tristate "XFS filesystem support"
-	select EXPORTFS if NFSD!=n
 	help
 	  XFS is a high performance journaling filesystem which originated
 	  on the SGI IRIX platform.  It is completely multi-threaded, can
@@ -18,11 +17,6 @@ config XFS_FS
 	  system of your root partition is compiled as a module, you'll need
 	  to use an initial ramdisk (initrd) to boot.
 
-config XFS_EXPORT
-	bool
-	depends on XFS_FS && EXPORTFS
-	default y
-
 config XFS_QUOTA
 	bool "XFS Quota support"
 	depends on XFS_FS
@@ -65,18 +59,19 @@ config XFS_POSIX_ACL
 	  If you don't know what Access Control Lists are, say N.
 
 config XFS_RT
-	bool "XFS Realtime support (EXPERIMENTAL)"
-	depends on XFS_FS && EXPERIMENTAL
+	bool "XFS Realtime subvolume support"
+	depends on XFS_FS
 	help
 	  If you say Y here you will be able to mount and use XFS filesystems
-	  which contain a realtime subvolume. The realtime subvolume is a
-	  separate area of disk space where only file data is stored. The
-	  realtime subvolume is designed to provide very deterministic
-	  data rates suitable for media streaming applications.
-
-	  See the xfs man page in section 5 for a bit more information.
+	  which contain a realtime subvolume.  The realtime subvolume is a
+	  separate area of disk space where only file data is stored.  It was
+	  originally designed to provide deterministic data rates suitable
+	  for media streaming applications, but is also useful as a generic
+	  mechanism for ensuring data and metadata/log I/Os are completely
+	  separated.  Regular file I/Os are isolated to a separate device
+	  from all other requests, and this can be done quite transparently
+	  to applications via the inherit-realtime directory inode flag.
 
-	  This feature is unsupported at this time, is not yet fully
-	  functional, and may cause serious problems.
+	  See the xfs man page in section 5 for additional information.
 
 	  If unsure, say N.
diff --git a/fs/xfs/Makefile-linux-2.6 b/fs/xfs/Makefile-linux-2.6
index 5d73eaa1971..9e7f85986d0 100644
--- a/fs/xfs/Makefile-linux-2.6
+++ b/fs/xfs/Makefile-linux-2.6
@@ -59,7 +59,6 @@ xfs-$(CONFIG_XFS_POSIX_ACL)	+= xfs_acl.o
 xfs-$(CONFIG_PROC_FS)		+= $(XFS_LINUX)/xfs_stats.o
 xfs-$(CONFIG_SYSCTL)		+= $(XFS_LINUX)/xfs_sysctl.o
 xfs-$(CONFIG_COMPAT)		+= $(XFS_LINUX)/xfs_ioctl32.o
-xfs-$(CONFIG_XFS_EXPORT)	+= $(XFS_LINUX)/xfs_export.o
 
 
 xfs-y				+= xfs_alloc.o \
@@ -73,14 +72,12 @@ xfs-y				+= xfs_alloc.o \
 				   xfs_btree.o \
 				   xfs_buf_item.o \
 				   xfs_da_btree.o \
-				   xfs_dir.o \
 				   xfs_dir2.o \
 				   xfs_dir2_block.o \
 				   xfs_dir2_data.o \
 				   xfs_dir2_leaf.o \
 				   xfs_dir2_node.o \
 				   xfs_dir2_sf.o \
-				   xfs_dir_leaf.o \
 				   xfs_error.o \
 				   xfs_extfree_item.o \
 				   xfs_fsops.o \
@@ -117,6 +114,7 @@ xfs-y				+= $(addprefix $(XFS_LINUX)/, \
 				   kmem.o \
 				   xfs_aops.o \
 				   xfs_buf.o \
+				   xfs_export.o \
 				   xfs_file.o \
 				   xfs_fs_subr.o \
 				   xfs_globals.o \
diff --git a/fs/xfs/linux-2.6/kmem.h b/fs/xfs/linux-2.6/kmem.h
index 2cfd33d4d8a..939bd84bc7e 100644
--- a/fs/xfs/linux-2.6/kmem.h
+++ b/fs/xfs/linux-2.6/kmem.h
@@ -23,42 +23,6 @@
 #include <linux/mm.h>
 
 /*
- * Process flags handling
- */
-
-#define PFLAGS_TEST_NOIO()              (current->flags & PF_NOIO)
-#define PFLAGS_TEST_FSTRANS()           (current->flags & PF_FSTRANS)
-
-#define PFLAGS_SET_NOIO() do {		\
-	current->flags |= PF_NOIO;	\
-} while (0)
-
-#define PFLAGS_CLEAR_NOIO() do {	\
-	current->flags &= ~PF_NOIO;	\
-} while (0)
-
-/* these could be nested, so we save state */
-#define PFLAGS_SET_FSTRANS(STATEP) do {	\
-	*(STATEP) = current->flags;	\
-	current->flags |= PF_FSTRANS;	\
-} while (0)
-
-#define PFLAGS_CLEAR_FSTRANS(STATEP) do { \
-	*(STATEP) = current->flags;	\
-	current->flags &= ~PF_FSTRANS;	\
-} while (0)
-
-/* Restore the PF_FSTRANS state to what was saved in STATEP */
-#define PFLAGS_RESTORE_FSTRANS(STATEP) do {     		\
-	current->flags = ((current->flags & ~PF_FSTRANS) |	\
-			  (*(STATEP) & PF_FSTRANS));		\
-} while (0)
-
-#define PFLAGS_DUP(OSTATEP, NSTATEP) do { \
-	*(NSTATEP) = *(OSTATEP);	\
-} while (0)
-
-/*
  * General memory allocation interfaces
  */
 
@@ -83,7 +47,7 @@ kmem_flags_convert(unsigned int __nocast flags)
 		lflags = GFP_ATOMIC | __GFP_NOWARN;
 	} else {
 		lflags = GFP_KERNEL | __GFP_NOWARN;
-		if (PFLAGS_TEST_FSTRANS() || (flags & KM_NOFS))
+		if ((current->flags & PF_FSTRANS) || (flags & KM_NOFS))
 			lflags &= ~__GFP_FS;
 	}
 	return lflags;
diff --git a/fs/xfs/linux-2.6/mrlock.h b/fs/xfs/linux-2.6/mrlock.h
index 1b262b790d9..32e1ce0f04c 100644
--- a/fs/xfs/linux-2.6/mrlock.h
+++ b/fs/xfs/linux-2.6/mrlock.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000-2005 Silicon Graphics, Inc.
+ * Copyright (c) 2000-2006 Silicon Graphics, Inc.
  * All Rights Reserved.
  *
  * This program is free software; you can redistribute it and/or
@@ -28,7 +28,7 @@ typedef struct {
 } mrlock_t;
 
 #define mrinit(mrp, name)	\
-	( (mrp)->mr_writer = 0, init_rwsem(&(mrp)->mr_lock) )
+	do { (mrp)->mr_writer = 0; init_rwsem(&(mrp)->mr_lock); } while (0)
 #define mrlock_init(mrp, t,n,s)	mrinit(mrp, n)
 #define mrfree(mrp)		do { } while (0)
 #define mraccess(mrp)		mraccessf(mrp, 0)
diff --git a/fs/xfs/linux-2.6/sema.h b/fs/xfs/linux-2.6/sema.h
index 194a84490bd..b25090094cc 100644
--- a/fs/xfs/linux-2.6/sema.h
+++ b/fs/xfs/linux-2.6/sema.h
@@ -34,20 +34,21 @@ typedef struct semaphore sema_t;
 #define initnsema(sp, val, name)	sema_init(sp, val)
 #define psema(sp, b)			down(sp)
 #define vsema(sp)			up(sp)
-#define valusema(sp)			(atomic_read(&(sp)->count))
-#define freesema(sema)
+#define freesema(sema)			do { } while (0)
+
+static inline int issemalocked(sema_t *sp)
+{
+	return down_trylock(sp) || (up(sp), 0);
+}
 
 /*
  * Map cpsema (try to get the sema) to down_trylock. We need to switch
  * the return values since cpsema returns 1 (acquired) 0 (failed) and
  * down_trylock returns the reverse 0 (acquired) 1 (failed).
  */
-
-#define cpsema(sp)			(down_trylock(sp) ? 0 : 1)
-
-/*
- * Didn't do cvsema(sp). Not sure how to map this to up/down/...
- * It does a vsema if the values is < 0 other wise nothing.
- */
+static inline int cpsema(sema_t *sp)
+{
+	return down_trylock(sp) ? 0 : 1;
+}
 
 #endif /* __XFS_SUPPORT_SEMA_H__ */
diff --git a/fs/xfs/linux-2.6/xfs_aops.c b/fs/xfs/linux-2.6/xfs_aops.c
index 4d191ef39b6..3e807b828e2 100644
--- a/fs/xfs/linux-2.6/xfs_aops.c
+++ b/fs/xfs/linux-2.6/xfs_aops.c
@@ -21,7 +21,6 @@
 #include "xfs_inum.h"
 #include "xfs_sb.h"
 #include "xfs_ag.h"
-#include "xfs_dir.h"
 #include "xfs_dir2.h"
 #include "xfs_trans.h"
 #include "xfs_dmapi.h"
@@ -29,7 +28,6 @@
 #include "xfs_bmap_btree.h"
 #include "xfs_alloc_btree.h"
 #include "xfs_ialloc_btree.h"
-#include "xfs_dir_sf.h"
 #include "xfs_dir2_sf.h"
 #include "xfs_attr_sf.h"
 #include "xfs_dinode.h"
@@ -76,7 +74,7 @@ xfs_page_trace(
 	int		mask)
 {
 	xfs_inode_t	*ip;
-	vnode_t		*vp = vn_from_inode(inode);
+	bhv