Import XFS CVS from 10092002

Documentation/Changes

@@ -56,6 +56,7 @@ o  modutils               2.4.2                   # insmod -V
 o  e2fsprogs              1.25                    # tune2fs
 o  jfsutils               1.0.14                  # fsck.jfs -V
 o  reiserfsprogs          3.x.1b                  # reiserfsck 2>&1|grep reiserfsprogs
+o  xfsprogs               2.1.0                   # xfs_db -V
 o  pcmcia-cs              3.1.21                  # cardmgr -V
 o  PPP                    2.4.0                   # pppd --version
 o  isdn4k-utils           3.1pre1                 # isdnctrl 2>&1|grep version
@@ -182,6 +183,17 @@ The reiserfsprogs package should be used for reiserfs-3.6.x
 versions of mkreiserfs, resize_reiserfs, debugreiserfs and
 reiserfsck. These utils work on both i386 and alpha platforms.
 
+Xfsprogs
+--------
+
+The latest version of xfsprogs contains mkfs.xfs, xfs_db, and the
+xfs_repair utilities, among others, for the XFS filesystem.  It is
+architecture independent and any version from 2.0.0 onward should
+work correctly with this version of the XFS kernel code.  For the new
+(v2) log format that has better support for stripe-size aligning on
+LVM and MD devices at least xfsprogs 2.1.0 is needed.
+
+
 Pcmcia-cs
 ---------
 
@@ -316,6 +328,10 @@ Reiserfsprogs
 -------------
 o  <ftp://ftp.namesys.com/pub/reiserfsprogs/reiserfsprogs-3.x.1b.tar.gz>
 
+Xfsprogs
+--------
+o  <ftp://oss.sgi.com/projects/xfs/download/cmd_tars/xfsprogs-2.1.0.src.tar.gz>
+
 LVM toolset
 -----------
 o  <http://www.sistina.com/lvm/>

Documentation/filesystems/00-INDEX

@@ -46,3 +46,5 @@ vfat.txt
 	- info on using the VFAT filesystem used in Windows NT and Windows 95
 vfs.txt
 	- Overview of the Virtual File System
+xfs.txt
+	- info and mount options for the XFS filesystem.

Documentation/filesystems/xfs.txt

+
+The SGI XFS Filesystem
+======================
+
+XFS is a high performance journaling filesystem which originated
+on the SGI IRIX platform.  It is completely multi-threaded, can
+support large files and large filesystems, extended attributes,
+variable block sizes, is extent based, and makes extensive use of
+Btrees (directories, extents, free space) to aid both performance
+and scalability.
+
+Refer to the documentation at http://oss.sgi.com/projects/xfs/
+for further details.  This implementation is on-disk compatible
+with the IRIX version of XFS.
+
+
+Options
+=======
+
+When mounting an XFS filesystem, the following options are accepted.
+
+  biosize=size
+	Sets the preferred buffered I/O size (default size is 64K).
+	"size" must be expressed as the logarithm (base2) of the
+	desired I/O size.
+	Valid values for this option are 14 through 16, inclusive
+	(i.e. 16K, 32K, and 64K bytes).  On machines with a 4K
+	pagesize, 13 (8K bytes) is also a valid size.
+	The preferred buffered I/O size can also be altered on an
+	individual file basis using the ioctl(2) system call.
+
+  dmapi/xdsm
+	Enable the DMAPI (Data Management API) event callouts.
+
+  irixsgid
+	Do not inherit the ISGID bit on subdirectories of ISGID
+	directories, if the process creating the subdirectory
+	is not a member of the parent directory group ID.
+	This matches IRIX behavior.
+
+  logbufs=value
+	Set the number of in-memory log buffers.  Valid numbers range
+	from 2-8 inclusive.
+	The default value is 8 buffers for filesystems with a
+	blocksize of 64K, 4 buffers for filesystems with a blocksize
+	of 32K, 3 buffers for filesystems with a blocksize of 16K
+	and 2 buffers for all other configurations.  Increasing the
+	number of buffers may increase performance on some workloads
+	at the cost of the memory used for the additional log buffers
+	and their associated control structures.
+
+  logbsize=value
+	Set the size of each in-memory log buffer.
+	Size may be specified in bytes, or in kilobytes with a "k" suffix.
+	Valid sizes for version 1 and version 2 logs are 16384 (16k) and 
+	32768 (32k).  Valid sizes for version 2 logs also include 
+	65536 (64k), 131072 (128k) and 262144 (256k).
+	The default value for machines with more than 32MB of memory
+	is 32768, machines with less memory use 16384 by default.
+
+  logdev=device and rtdev=device
+	Use an external log (metadata journal) and/or real-time device.
+	An XFS filesystem has up to three parts: a data section, a log
+	section, and a real-time section.  The real-time section is
+	optional, and the log section can be separate from the data
+	section or contained within it.
+
+  noalign
+	Data allocations will not be aligned at stripe unit boundaries.
+
+  noatime
+	Access timestamps are not updated when a file is read.
+
+  norecovery
+	The filesystem will be mounted without running log recovery.
+	If the filesystem was not cleanly unmounted, it is likely to
+	be inconsistent when mounted in "norecovery" mode.
+	Some files or directories may not be accessible because of this.
+	Filesystems mounted "norecovery" must be mounted read-only or
+	the mount will fail.
+
+  osyncisosync
+	Make O_SYNC writes implement true O_SYNC.  WITHOUT this option,
+	Linux XFS behaves as if an "osyncisdsync" option is used,
+	which will make writes to files opened with the O_SYNC flag set
+	behave as if the O_DSYNC flag had been used instead.
+	This can result in better performance without compromising
+	data safety.
+	However if this option is not in effect, timestamp updates from
+	O_SYNC writes can be lost if the system crashes.
+	If timestamp updates are critical, use the osyncisosync option.
+
+  quota/usrquota/uqnoenforce
+	User disk quota accounting enabled, and limits (optionally)
+	enforced.
+
+  grpquota/gqnoenforce
+	Group disk quota accounting enabled and limits (optionally)
+	enforced.
+
+  sunit=value and swidth=value
+	Used to specify the stripe unit and width for a RAID device or
+	a stripe volume.  "value" must be specified in 512-byte block
+	units.
+	If this option is not specified and the filesystem was made on
+	a stripe volume or the stripe width or unit were specified for
+	the RAID device at mkfs time, then the mount system call will
+	restore the value from the superblock.  For filesystems that
+	are made directly on RAID devices, these options can be used
+	to override the information in the superblock if the underlying
+	disk layout changes after the filesystem has been created.
+	The "swidth" option is required if the "sunit" option has been
+	specified, and must be a multiple of the "sunit" value.
+
+  nouuid
+        Don't check for double mounted file systems using the file system uuid.
+        This is useful to mount LVM snapshot volumes.
+

MAINTAINERS

@@ -1912,6 +1912,14 @@ M:	eis@baty.hanse.de
 L:	linux-x25@vger.kernel.org
 S:	Maintained
 
+XFS FILESYSTEM
+P:	Silicon Graphics Inc
+M:	owner-xfs@oss.sgi.com
+M:	lord@sgi.com
+L:	linux-xfs@oss.sgi.com
+W:	http://oss.sgi.com/projects/xfs
+S:	Supported
+
 X86 3-LEVEL PAGING (PAE) SUPPORT
 P:	Ingo Molnar
 M:	mingo@redhat.com

fs/Config.help

@@ -1036,3 +1036,50 @@ CONFIG_NCPFS_NLS
 
   To select codepages and I/O charsets use ncpfs-2.2.0.13 or newer.
 
+CONFIG_XFS_FS
+  XFS is a high performance journaling filesystem which originated
+  on the SGI IRIX platform.  It is completely multi-threaded, can
+  support large files and large filesystems, extended attributes,
+  variable block sizes, is extent based, and makes extensive use of
+  Btrees (directories, extents, free space) to aid both performance
+  and scalability.
+
+  Refer to the documentation at <http://oss.sgi.com/projects/xfs/>
+  for complete details.  This implementation is on-disk compatible
+  with the IRIX version of XFS.
+
+  If you want to compile this file system as a module ( = code which
+  can be inserted in and removed from the running kernel whenever you
+  want), say M here and read <file:Documentation/modules.txt>. The
+  module will be called xfs.o.  Be aware, however, that if the file
+  system of your root partition is compiled as a module, you'll need
+  to use an initial ramdisk (initrd) to boot.
+
+CONFIG_XFS_QUOTA
+  If you say Y here, you will be able to set limits for disk usage on
+  a per user and/or a per group basis under XFS.  XFS considers quota
+  information as filesystem metadata and uses journaling to provide a
+  higher level guarantee of consistency.  The on-disk data format for
+  quota is also compatible with the IRIX version of XFS, allowing a
+  filesystem to be migrated between Linux and IRIX without any need
+  for conversion.
+
+  If unsure, say N.  More comprehensive documentation can be found in
+  README.quota in the xfsprogs package.  XFS quota can be used either
+  with or without the generic quota support enabled (CONFIG_QUOTA) -
+  they are completely independent subsystems.
+
+CONFIG_XFS_RT
+  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.
+
+  This feature is unsupported at this time, is not yet fully
+  functional, and may cause serious problems.
+
+  If unsure, say N.
+

fs/Config.in

@@ -101,6 +101,13 @@ dep_mbool '  UDF write support (DANGEROUS)' CONFIG_UDF_RW $CONFIG_UDF_FS $CONFIG
 tristate 'UFS file system support (read only)' CONFIG_UFS_FS
 dep_mbool '  UFS file system write support (DANGEROUS)' CONFIG_UFS_FS_WRITE $CONFIG_UFS_FS $CONFIG_EXPERIMENTAL
 
+tristate 'XFS filesystem support' CONFIG_XFS_FS
+dep_mbool    '  Realtime support (EXPERIMENTAL)' CONFIG_XFS_RT $CONFIG_XFS_FS $CONFIG_EXPERIMENTAL
+dep_mbool    '  Quota support' CONFIG_XFS_QUOTA $CONFIG_XFS_FS
+if [ "$CONFIG_XFS_QUOTA" = "y" ]; then
+   define_bool CONFIG_QUOTACTL y
+fi
+
 if [ "$CONFIG_NET" = "y" ]; then
 
    mainmenu_option next_comment

fs/Makefile

@@ -84,5 +84,6 @@ obj-$(CONFIG_ADFS_FS)		+= adfs/
 obj-$(CONFIG_REISERFS_FS)	+= reiserfs/
 obj-$(CONFIG_SUN_OPENPROMFS)	+= openpromfs/
 obj-$(CONFIG_JFS_FS)		+= jfs/
+obj-$(CONFIG_XFS_FS)		+= xfs/
 
 include $(TOPDIR)/Rules.make

fs/xfs/Makefile

+#
+# Copyright (c) 2000-2002 Silicon Graphics, Inc.  All Rights Reserved.
+#
+# This program is free software; you can redistribute it and/or modify it
+# under the terms of version 2 of the GNU General Public License as
+# published by the Free Software Foundation.
+#
+# This program is distributed in the hope that it would be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+#
+# Further, this software is distributed without any warranty that it is
+# free of the rightful claim of any third person regarding infringement
+# or the like.	Any license provided herein, whether implied or
+# otherwise, applies only to this software file.  Patent licenses, if
+# any, provided herein do not apply to combinations of this program with
+# other software, or any other product whatsoever.
+#
+# You should have received a copy of the GNU General Public License along
+# with this program; if not, write the Free Software Foundation, Inc., 59
+# Temple Place - Suite 330, Boston MA 02111-1307, USA.
+#
+# Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
+# Mountain View, CA  94043, or:
+#
+# http://www.sgi.com
+#
+# For further information regarding this notice, see:
+#
+# http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
+#
+# Makefile for XFS on Linux.
+#
+
+
+# we also have source in the subdirectories..
+vpath %.c =  . linux pagebuf support
+
+
+# This needs -I. because everything does #include <xfs.h> instead of "xfs.h".
+# The code is wrong, local files should be included using "xfs.h", not <xfs.h>
+# but I am not going to change every file at the moment.
+EXTRA_CFLAGS +=	 -I. -funsigned-char
+
+ifeq ($(CONFIG_XFS_DEBUG),y)
+	EXTRA_CFLAGS += -g -DSTATIC="" -DDEBUG -DXFSDEBUG
+endif
+ifeq ($(CONFIG_PAGEBUF_DEBUG),y)
+	EXTRA_CFLAGS += -DPAGEBUF_TRACE
+endif
+
+export-objs			:= page_buf.o ktrace.o xfs_globals.o
+
+obj-$(CONFIG_XFS_FS)		+= xfs.o
+
+
+xfs-obj-$(CONFIG_XFS_RT)	+= xfs_rtalloc.o
+
+xfs-obj-$(CONFIG_XFS_QUOTA)	+= xfs_dquot.o \
+				   xfs_dquot_item.o \
+				   xfs_trans_dquot.o \
+				   xfs_qm_syscalls.o \
+				   xfs_qm.o
+
+xfs-obj-$(CONFIG_FS_POSIX_ACL)	+= xfs_acl.o
+xfs-obj-$(CONFIG_FS_POSIX_CAP)	+= xfs_cap.o
+xfs-obj-$(CONFIG_FS_POSIX_MAC)	+= xfs_mac.o
+xfs-obj-$(CONFIG_PROC_FS)	+= xfs_stats.o
+xfs-obj-$(CONFIG_SYSCTL)	+= xfs_sysctl.o
+
+
+xfs-objs			+= $(xfs-obj-y) \
+				   xfs_alloc.o \
+				   xfs_alloc_btree.o \
+				   xfs_attr.o \
+				   xfs_attr_fetch.o \
+				   xfs_attr_leaf.o \
+				   xfs_bit.o \
+				   xfs_bmap.o \
+				   xfs_bmap_btree.o \
+				   xfs_btree.o \
+				   xfs_buf_item.o \
+				   xfs_da_btree.o \
+				   xfs_dir.o \
+				   xfs_dir2.o \
+				   xfs_dir2_block.o \
+				   xfs_dir2_data.o \
+				   xfs_dir2_leaf.o \
+				   xfs_dir2_node.o \
+				   xfs_dir2_sf.o \
+				   xfs_dir2_trace.o \
+				   xfs_dir_leaf.o \
+				   xfs_error.o \
+				   xfs_extfree_item.o \
+				   xfs_fsops.o \
+				   xfs_ialloc.o \
+				   xfs_ialloc_btree.o \
+				   xfs_iget.o \
+				   xfs_inode.o \
+				   xfs_inode_item.o \
+				   xfs_iocore.o \
+				   xfs_itable.o \
+				   xfs_dfrag.o \
+				   xfs_log.o \
+				   xfs_log_recover.o \
+				   xfs_macros.o \
+				   xfs_mount.o \
+				   xfs_rename.o \
+				   xfs_trans.o \
+				   xfs_trans_ail.o \
+				   xfs_trans_buf.o \
+				   xfs_trans_extfree.o \
+				   xfs_trans_inode.o \
+				   xfs_trans_item.o \
+				   xfs_utils.o \
+				   xfs_vfsops.o \
+				   xfs_vnodeops.o \
+				   xfs_rw.o
+
+# Objects in pagebuf/
+xfs-objs			+= page_buf.o \
+				   page_buf_locking.o
+
+# Objects in linux/
+xfs-objs			+= xfs_aops.o \
+				   xfs_behavior.o \
+				   xfs_file.o \
+				   xfs_fs_subr.o \
+				   xfs_globals.o \
+				   xfs_ioctl.o \
+				   xfs_iops.o \
+				   xfs_lrw.o \
+				   xfs_super.o \
+				   xfs_vnode.o
+
+# Objects in support/
+xfs-objs			+= debug.o \
+				   kmem.o \
+				   ktrace.o \
+				   move.o \
+				   mrlock.o \
+				   qsort.o \
+				   uuid.o
+
+# If both xfs and kdb modules are built in then xfsidbg is built in.  If xfs is
+# a module and kdb modules are being compiled then xfsidbg must be a module, to
+# follow xfs.  If xfs is built in then xfsidbg tracks the kdb module state.
+# This must come after the main xfs code so xfs initialises before xfsidbg.
+# KAO
+ifneq ($(CONFIG_KDB_MODULES),)
+  ifeq ($(CONFIG_XFS_FS),y)
+    obj-$(CONFIG_KDB_MODULES)	+= xfsidbg.o
+  else
+    obj-$(CONFIG_XFS_FS)	+= xfsidbg.o
+  endif
+endif
+
+CFLAGS_xfsidbg.o += -I $(TOPDIR)/arch/$(ARCH)/kdb
+
+include $(TOPDIR)/Rules.make

fs/xfs/linux/xfs_behavior.c

+/*
+ * Copyright (c) 2000 Silicon Graphics, Inc.  All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * Further, this software is distributed without any warranty that it is
+ * free of the rightful claim of any third person regarding infringement
+ * or the like.	 Any license provided herein, whether implied or
+ * otherwise, applies only to this software file.  Patent licenses, if
+ * any, provided herein do not apply to combinations of this program with
+ * other software, or any other product whatsoever.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write the Free Software Foundation, Inc., 59
+ * Temple Place - Suite 330, Boston MA 02111-1307, USA.
+ *
+ * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
+ * Mountain View, CA  94043, or:
+ *
+ * http://www.sgi.com
+ *
+ * For further information regarding this notice, see:
+ *
+ * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
+ *
+ */
+
+/*
+ * Source file used to associate/disassociate behaviors with virtualized
+ * objects.  See behavior.h for more information about behaviors, etc.
+ *
+ * The implementation is split between functions in this file and macros
+ * in behavior.h.
+ */
+#include <xfs.h>
+
+kmem_zone_t	*bhv_global_zone;
+
+/*
+ * Global initialization function called out of main.
+ */
+void
+bhv_global_init(void)
+{
+	/*
+	 * Initialize a behavior zone used by subsystems using behaviors
+	 * but without any private data.  In the UNIKERNEL case, this zone
+	 * is used only for behaviors that are not yet isolated to a single
+	 * cell.  The only such user is in pshm.c in which a dummy vnode is
+	 * obtained in support of vce avoidance logic.
+	 */
+	bhv_global_zone = kmem_zone_init(sizeof(bhv_desc_t), "bhv_global_zone");
+}
+
+/*
+ * Remove a behavior descriptor from a position in a behavior chain;
+ * the postition is guaranteed not to be the first position.
+ * Should only be called by the bhv_remove() macro.
+ *
+ * The act of modifying the chain is done atomically w.r.t. ops-in-progress
+ * (see comment at top of behavior.h for more info on synchronization).
+ */
+void
+bhv_remove_not_first(bhv_head_t *bhp, bhv_desc_t *bdp)
+{
+	bhv_desc_t	*curdesc, *prev;
+
+	ASSERT(bhp->bh_first != NULL);
+	ASSERT(bhp->bh_first->bd_next != NULL);
+
+	prev = bhp->bh_first;
+	for (curdesc = bhp->bh_first->bd_next;
+	     curdesc != NULL;
+	     curdesc = curdesc->bd_next) {
+
+		if (curdesc == bdp)
+			break;		/* found it */
+		prev = curdesc;
+	}
+
+	ASSERT(curdesc == bdp);
+	prev->bd_next = bdp->bd_next;	/* remove from after prev */
+					/* atomic wrt oip's */
+}
+
+/*
+ * Look for a specific ops vector on the specified behavior chain.
+ * Return the associated behavior descriptor.  Or NULL, if not found.
+ */
+bhv_desc_t *
+bhv_lookup(bhv_head_t *bhp, void *ops)
+{
+	bhv_desc_t	*curdesc;
+
+	for (curdesc = bhp->bh_first;
+	     curdesc != NULL;
+	     curdesc = curdesc->bd_next) {
+
+		if (curdesc->bd_ops == ops)
+			return curdesc;
+	}
+
+	return NULL;
+}
+
+/*
+ * Look for a specific ops vector on the specified behavior chain.
+ * Return the associated behavior descriptor.  Or NULL, if not found.
+ *
+ * The caller has not read locked the behavior chain, so acquire the
+ * lock before traversing the chain.
+ */
+bhv_desc_t *
+bhv_lookup_unlocked(bhv_head_t *bhp, void *ops)
+{
+	bhv_desc_t	*bdp;
+
+	BHV_READ_LOCK(bhp);
+	bdp = bhv_lookup(bhp, ops);
+	BHV_READ_UNLOCK(bhp);
+
+	return bdp;
+}
+
+/*
+ * Return the base behavior in the chain, or NULL if the chain
+ * is empty.
+ *
+ * The caller has not read locked the behavior chain, so acquire the
+ * lock before traversing the chain.
+ */
+bhv_desc_t *
+bhv_base_unlocked(bhv_head_t *bhp)
+{
+	bhv_desc_t	*curdesc;
+
+	BHV_READ_LOCK(bhp);
+	for (curdesc = bhp->bh_first;
+	     curdesc != NULL;
+	     curdesc = curdesc->bd_next) {
+
+		if (curdesc->bd_next == NULL) {
+			BHV_READ_UNLOCK(bhp);
+			return curdesc;
+		}
+	}
+
+	BHV_READ_UNLOCK(bhp);
+	return NULL;
+}
+
+#define BHVMAGIC (void *)0xf00d
+
+/* ARGSUSED */
+void
+bhv_head_init(
+	bhv_head_t *bhp,
+	char *name)
+{
+	bhp->bh_first = NULL;
+	bhp->bh_lockp = BHVMAGIC;
+}
+
+
+/* ARGSUSED */
+void
+bhv_head_reinit(
+	bhv_head_t *bhp)
+{
+	ASSERT(bhp->bh_first == NULL);
+	ASSERT(bhp->bh_lockp == BHVMAGIC);
+}
+
+
+void
+bhv_insert_initial(
+	bhv_head_t *bhp,
+	bhv_desc_t *bdp)
+{
+	ASSERT(bhp->bh_first == NULL);
+	ASSERT(bhp->bh_lockp == BHVMAGIC);
+	(bhp)->bh_first = bdp;
+}
+
+void
+bhv_head_destroy(
+	bhv_head_t *bhp)
+{
+	ASSERT(bhp->bh_first == NULL);
+	ASSERT(bhp->bh_lockp == BHVMAGIC);
+	bhp->bh_lockp = NULL;
+}
+

fs/xfs/linux/xfs_behavior.h

+/*
+ * Copyright (c) 2000, 2002 Silicon Graphics, Inc.  All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * Further, this software is distributed without any warranty that it is
+ * free of the rightful claim of any third person regarding infringement
+ * or the like.	 Any license provided herein, whether implied or
+ * otherwise, applies only to this software file.  Patent licenses, if
+ * any, provided herein do not apply to combinations of this program with
+ * other software, or any other product whatsoever.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write the Free Software Foundation, Inc., 59
+ * Temple Place - Suite 330, Boston MA 02111-1307, USA.
+ *
+ * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
+ * Mountain View, CA  94043, or:
+ *
+ * http://www.sgi.com
+ *
+ * For further information regarding this notice, see:
+ *
+ * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
+ */
+#ifndef __XFS_BEHAVIOR_H__
+#define __XFS_BEHAVIOR_H__
+
+/*
+ * Header file used to associate behaviors with virtualized objects.
+ *
+ * A virtualized object is an internal, virtualized representation of
+ * OS entities such as persistent files, processes, or sockets.	 Examples
+ * of virtualized objects include vnodes, vprocs, and vsockets.	 Often
+ * a virtualized object is referred to simply as an "object."
+ *
+ * A behavior is essentially an implementation layer associated with
+ * an object.  Multiple behaviors for an object are chained together,
+ * the order of chaining determining the order of invocation.  Each
+ * behavior of a given object implements the same set of interfaces
+ * (e.g., the VOP interfaces).
+ *
+ * Behaviors may be dynamically inserted into an object's behavior chain,
+ * such that the addition is transparent to consumers that already have
+ * references to the object.  Typically, a given behavior will be inserted
+ * at a particular location in the behavior chain.  Insertion of new
+ * behaviors is synchronized with operations-in-progress (oip's) so that
+ * the oip's always see a consistent view of the chain.
+ *
+ * The term "interpostion" is used to refer to the act of inserting
+ * a behavior such that it interposes on (i.e., is inserted in front
+ * of) a particular other behavior.  A key example of this is when a
+ * system implementing distributed single system image wishes to
+ * interpose a distribution layer (providing distributed coherency)
+ * in front of an object that is otherwise only accessed locally.
+ *
+ * Note that the traditional vnode/inode combination is simply a virtualized
+ * object that has exactly one associated behavior.
+ *
+ * Behavior synchronization is logic which is necessary under certain
+ * circumstances that there is no conflict between ongoing operations
+ * traversing the behavior chain and those dunamically modifying the
+ * behavior chain.  Because behavior synchronization adds extra overhead
+ * to virtual operation invocation, we want to restrict, as much as
+ * we can, the requirement for this extra code, to those situations
+ * in which it is truly necessary.
+ *
+ * Behavior synchronization is needed whenever there's at least one class
+ * of object in the system for which:
+ * 1) multiple behaviors for a given object are supported,
+ * -- AND --
+ * 2a) insertion of a new behavior can happen dynamically at any time during
+ *     the life of an active object,
+ *	-- AND --
+ *	3a) insertion of a new behavior needs to synchronize with existing
+ *	    ops-in-progress.
+ *	-- OR --
+ *	3b) multiple different behaviors can be dynamically inserted at
+ *	    any time during the life of an active object
+ *	-- OR --
+ *	3c) removal of a behavior can occur at any time during the life of
+ *	    an active object.
+ * -- OR --
+ * 2b) removal of a behavior can occur at any time during the life of an
+ *     active object
+ *
+ */
+
+typedef void	bhv_head_lock_t;
+
+/*
+ * Behavior head.  Head of the chain of behaviors.
+ * Contained within each virtualized object data structure.
+ */
+typedef struct bhv_head {
+	struct bhv_desc *bh_first;	/* first behavior in chain */
+	bhv_head_lock_t *bh_lockp;	/* pointer to lock info struct */
+} bhv_head_t;
+
+/*
+ * Behavior descriptor.	 Descriptor associated with each behavior.
+ * Contained within the behavior's private data structure.
+ */
+typedef struct bhv_desc {
+	void		*bd_pdata;	/* private data for this behavior */
+	void		*bd_vobj;	/* virtual object associated with */
+	void		*bd_ops;	/* ops for this behavior */
+	struct bhv_desc *bd_next;	/* next behavior in chain */
+} bhv_desc_t;
+
+/*
+ * Behavior identity field.  A behavior's identity determines the position
+ * where it lives within a behavior chain, and it's always the first field
+ * of the behavior's ops vector. The optional id field further identifies the
+ * subsystem responsible for the behavior.
+ */
+typedef struct bhv_identity {
+	__u16	bi_id;		/* owning subsystem id */
+	__u16	bi_position;	/* position in chain */
+} bhv_identity_t;
+
+typedef bhv_identity_t bhv_position_t;
+
+#define BHV_IDENTITY_INIT(id,pos)	{id, pos}
+
+#define BHV_IDENTITY_INIT_POSITION(pos) BHV_IDENTITY_INIT(0, pos)
+
+
+/*
+ * Define boundaries of position values.
+ */
+#define BHV_POSITION_INVALID	0	/* invalid position number */
+#define BHV_POSITION_BASE	1	/* base (last) implementation layer */
+#define BHV_POSITION_TOP	63	/* top (first) implementation layer */
+
+/*
+ * Plumbing macros.
+ */
+#define BHV_HEAD_FIRST(bhp)	(ASSERT((bhp)->bh_first), (bhp)->bh_first)
+#define BHV_NEXT(bdp)		(ASSERT((bdp)->bd_next), (bdp)->bd_next)
+#define BHV_NEXTNULL(bdp)	((bdp)->bd_next)
+#define BHV_VOBJ(bdp)		(ASSERT((bdp)->bd_vobj), (bdp)->bd_vobj)
+#define BHV_VOBJNULL(bdp)	((bdp)->bd_vobj)
+#define BHV_PDATA(bdp)		(bdp)->bd_pdata
+#define BHV_OPS(bdp)		(bdp)->bd_ops
+#define BHV_IDENTITY(bdp)	((bhv_identity_t *)(bdp)->bd_ops)
+#define BHV_POSITION(bdp)	(BHV_IDENTITY(bdp)->bi_position)
+
+
+#define BHV_READ_LOCK(bhp)
+#define BHV_READ_UNLOCK(bhp)
+#define BHV_NOT_READ_LOCKED(bhp)	1
+#define BHV_IS_WRITE_LOCKED(bhp)	1
+#define BHV_NOT_WRITE_LOCKED(bhp)	1
+
+extern void bhv_head_init(bhv_head_t *, char *);
+extern void bhv_head_destroy(bhv_head_t *);
+extern void bhv_head_reinit(bhv_head_t *);
+extern void bhv_insert_initial(bhv_head_t *, bhv_desc_t *);
+
+/*
+ * Initialize a new behavior descriptor.
+ * Arguments:
+ *   bdp - pointer to behavior descriptor
+ *   pdata - pointer to behavior's private data
+ *   vobj - pointer to associated virtual object
+ *   ops - pointer to ops for this behavior
+ */
+#define bhv_desc_init(bdp, pdata, vobj, ops)		\
+ {							\
+	(bdp)->bd_pdata = pdata;			\
+	(bdp)->bd_vobj = vobj;				\
+	(bdp)->bd_ops = ops;				\
+	(bdp)->bd_next = NULL;				\
+ }
+
+#define BHV_DESC_INIT(so,A,B)	bhv_desc_init(&(so->so_bhv),so,A,B)
+
+/*
+ * Remove a behavior descriptor from a behavior chain.
+ */
+#define bhv_remove(bhp, bdp)				\
+ {							\
+	if ((bhp)->bh_first == (bdp)) {			\
+		/*					\
+		* Remove from front of chain.		\
+		 * Atomic wrt oip's.			\
+		*/					\
+	       (bhp)->bh_first = (bdp)->bd_next;	\
+	 } else {					\
+	       /* remove from non-front of chain */	\
+	       bhv_remove_not_first(bhp, bdp);		\
+	}						\
+	(bdp)->bd_vobj = NULL;				\
+ }
+
+/*
+ * Behavior module prototypes.
+ */
+extern void		bhv_remove_not_first(bhv_head_t *bhp, bhv_desc_t *bdp);
+extern bhv_desc_t *	bhv_lookup(bhv_head_t *bhp, void *ops);
+extern bhv_desc_t *	bhv_lookup_unlocked(bhv_head_t *bhp, void *ops);
+extern bhv_desc_t *	bhv_base_unlocked(bhv_head_t *bhp);
+
+#endif /* __XFS_BEHAVIOR_H__ */

fs/xfs/linux/xfs_cred.h

+/*
+ * Copyright (c) 2000-2002 Silicon Graphics, Inc.  All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * Further, this software is distributed without any warranty that it is
+ * free of the rightful claim of any third person regarding infringement
+ * or the like.	 Any license provided herein, whether implied or
+ * otherwise, applies only to this software file.  Patent licenses, if
+ * any, provided herein do not apply to combinations of this program with
+ * other software, or any other product whatsoever.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write the Free Software Foundation, Inc., 59
+ * Temple Place - Suite 330, Boston MA 02111-1307, USA.
+ *
+ * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
+ * Mountain View, CA  94043, or:
+ *
+ * http://www.sgi.com
+ *
+ * For further information regarding this notice, see:
+ *
+ * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
+ */
+#ifndef __XFS_CRED_H__
+#define __XFS_CRED_H__
+
+/*
+ * Credentials
+ */
+typedef struct cred {
+	/* EMPTY */
+} cred_t;
+
+extern struct cred *sys_cred;
+
+/* this is a hack.. (assums sys_cred is the only cred_t in the system) */
+static __inline int capable_cred(cred_t *cr, int cid)
+{
+	return (cr == sys_cred) ? 1 : capable(cid);
+}
+
+#endif	/* __XFS_CRED_H__ */

fs/xfs/linux/xfs_file.c

+/*
+ * Copyright (c) 2000-2002 Silicon Graphics, Inc.  All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * Further, this software is distributed without any warranty that it is
+ * free of the rightful claim of any third person regarding infringement
+ * or the like.	 Any license provided herein, whether implied or
+ * otherwise, applies only to this software file.  Patent licenses, if
+ * any, provided herein do not apply to combinations of this program with
+ * other software, or any other product whatsoever.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write the Free Software Foundation, Inc., 59
+ * Temple Place - Suite 330, Boston MA 02111-1307, USA.
+ *
+ * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
+ * Mountain View, CA  94043, or:
+ *
+ * http://www.sgi.com
+ *
+ * For further information regarding this notice, see:
+ *
+ * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
+ */
+
+#include <xfs.h>
+#include <linux/dcache.h>
+#include <linux/pagemap.h>
+#include <linux/slab.h>
+#include <linux/mman.h> /* for PROT_WRITE */
+
+static struct vm_operations_struct linvfs_file_vm_ops;
+
+
+STATIC ssize_t
+linvfs_read(
+	struct file	*filp,
+	char		*buf,
+	size_t		size,
+	loff_t		*offset)
+{
+	vnode_t		*vp;
+	int		error;
+
+	vp = LINVFS_GET_VP(filp->f_dentry->d_inode);
+	ASSERT(vp);
+
+	VOP_READ(vp, filp, buf, size, offset, NULL, error);
+
+	return(error);
+}
+
+
+STATIC ssize_t
+linvfs_write(
+	struct file	*file,
+	const char	*buf,
+	size_t		count,
+	loff_t		*ppos)
+{
+	struct inode	*inode = file->f_dentry->d_inode;
+	loff_t		pos;
+	vnode_t		*vp;
+	int		err;	/* Use negative errors in this f'n */
+
+	if ((ssize_t) count < 0)
+		return -EINVAL;
+
+	if (!access_ok(VERIFY_READ, buf, count))
+		return -EFAULT;
+
+	pos = *ppos;
+	err = -EINVAL;
+	if (pos < 0)
+		goto out;
+
+	err = file->f_error;
+	if (err) {
+		file->f_error = 0;
+		goto out;
+	}
+
+	vp = LINVFS_GET_VP(inode);
+	ASSERT(vp);
+
+	/* We allow multiple direct writers in, there is no
+	 * potential call to vmtruncate in that path.
+	 */
+	if (!(file->f_flags & O_DIRECT))
+		down(&inode->i_sem);
+
+	VOP_WRITE(vp, file, buf, count, &pos, NULL, err);
+	*ppos = pos;
+
+	if (!(file->f_flags & O_DIRECT))
+		up(&inode->i_sem);
+out:
+
+	return(err);
+}
+
+
+STATIC int
+linvfs_open(
+	struct inode	*inode,
+	struct file	*filp)
+{
+	vnode_t		*vp = LINVFS_GET_VP(inode);
+	int		error;
+
+	if (!(filp->f_flags & O_LARGEFILE) && inode->i_size > MAX_NON_LFS)
+		return -EFBIG;
+
+	ASSERT(vp);
+	VOP_OPEN(vp, NULL, error);
+	return -error;
+}
+
+
+STATIC int
+linvfs_release(
+	struct inode	*inode,
+	struct file	*filp)
+{
+	vnode_t		*vp = LINVFS_GET_VP(inode);
+	int		error = 0;
+
+	if (vp)
+		VOP_RELEASE(vp, error);
+	return -error;
+}
+
+
+STATIC int
+linvfs_fsync(
+	struct file	*filp,
+	struct dentry	*dentry,
+	int		datasync)
+{
+	struct inode	*inode = dentry->d_inode;
+	vnode_t		*vp = LINVFS_GET_VP(inode);
+	int		error;
+	int		flags = FSYNC_WAIT;
+
+	if (datasync)
+		flags |= FSYNC_DATA;
+
+	ASSERT(vp);
+
+	VOP_FSYNC(vp, flags, NULL, (off_t)0, (off_t)-1, error);
+
+	return -error;
+}
+
+/*
+ * linvfs_readdir maps to VOP_READDIR().
+ * We need to build a uio, cred, ...
+ */
+
+#define nextdp(dp)	((struct xfs_dirent *)((char *)(dp) + (dp)->d_reclen))
+
+STATIC int
+linvfs_readdir(
+	struct file	*filp,
+	void		*dirent,
+	filldir_t	filldir)
+{
+	int		error = 0;
+	vnode_t		*vp;
+	uio_t		uio;
+	iovec_t		iov;
+	int		eof = 0;
+	caddr_t		read_buf;
+	int		namelen, size = 0;
+	size_t		rlen = PAGE_CACHE_SIZE << 2;
+	off_t		start_offset;
+	xfs_dirent_t	*dbp = NULL;
+
+	vp = LINVFS_GET_VP(filp->f_dentry->d_inode);
+	ASSERT(vp);
+
+	/* Try fairly hard to get memory */
+	do {
+		if ((read_buf = (caddr_t)kmalloc(rlen, GFP_KERNEL)))
+			break;
+		rlen >>= 1;
+	} while (rlen >= 1024);
+
+	if (read_buf == NULL)
+		return -ENOMEM;
+
+	uio.uio_iov = &iov;
+	uio.uio_fmode = filp->f_mode;
+	uio.uio_segflg = UIO_SYSSPACE;
+	uio.uio_offset = filp->f_pos;
+
+	while (!eof) {
+		uio.uio_resid = iov.iov_len = rlen;
+		iov.iov_base = read_buf;
+		uio.uio_iovcnt = 1;
+
+		start_offset = uio.uio_offset;
+
+		VOP_READDIR(vp, &uio, NULL, &eof, error);
+		if ((uio.uio_offset == start_offset) || error) {
+			size = 0;
+			break;
+		}
+
+		size = rlen - uio.uio_resid;
+		dbp = (xfs_dirent_t *)read_buf;
+		while (size > 0) {
+			namelen = strlen(dbp->d_name);
+
+			if (filldir(dirent, dbp->d_name, namelen,
+					(loff_t) dbp->d_off,
+					(ino_t) dbp->d_ino,
+					DT_UNKNOWN)) {
+				goto done;
+			}
+			size -= dbp->d_reclen;
+			dbp = nextdp(dbp);
+		}
+	}
+done:
+	if (!error) {
+		if (size == 0)
+			filp->f_pos = uio.uio_offset;
+		else if (dbp)
+			filp->f_pos = dbp->d_off;
+	}
+
+	kfree(read_buf);
+	return -error;
+}
+
+STATIC int
+linvfs_file_mmap(
+	struct file	*filp,
+	struct vm_area_struct *vma)
+{
+	struct inode	*ip = filp->f_dentry->d_inode;
+	vnode_t		*vp = LINVFS_GET_VP(ip);
+	vattr_t		va = { .va_mask = AT_UPDATIME };
+	int		error;
+
+	if ((vp->v_type == VREG) && (vp->v_vfsp->vfs_flag & VFS_DMI)) {
+		error = -xfs_dm_send_mmap_event(vma, 0);
+		if (error)
+			return error;
+	}
+
+	vma->vm_ops = &linvfs_file_vm_ops;
+
+	VOP_SETATTR(vp, &va, AT_UPDATIME, NULL, error);
+	UPDATE_ATIME(ip);
+	return 0;
+}
+
+
+STATIC int
+linvfs_ioctl(
+	struct inode	*inode,
+	struct file	*filp,
+	unsigned int	cmd,
+	unsigned long	arg)
+{
+	int		error;
+	vnode_t		*vp = LINVFS_GET_VP(inode);
+
+	ASSERT(vp);
+	VOP_IOCTL(vp, inode, filp, cmd, arg, error);
+	VMODIFY(vp);
+
+	/* NOTE:  some of the ioctl's return positive #'s as a
+	 *	  byte count indicating success, such as
+	 *	  readlink_by_handle.  So we don't "sign flip"
+	 *	  like most other routines.  This means true
+	 *	  errors need to be returned as a negative value.
+	 */
+	return error;
+}
+
+#ifdef HAVE_VMOP_MPROTECT
+STATIC int
+linvfs_mprotect(
+	struct vm_area_struct *vma,
+	unsigned int	newflags)
+{
+	vnode_t		*vp = LINVFS_GET_VP(vma->vm_file->f_dentry->d_inode);
+	int		error = 0;
+
+	if ((vp->v_type == VREG) && (vp->v_vfsp->vfs_flag & VFS_DMI)) {
+		if ((vma->vm_flags & VM_MAYSHARE) &&
+		    (newflags & PROT_WRITE) && !(vma->vm_flags & PROT_WRITE)){
+			error = xfs_dm_send_mmap_event(vma, VM_WRITE);
+		    }
+	}
+	return error;
+}
+#endif /* HAVE_VMOP_MPROTECT */
+
+
+struct file_operations linvfs_file_operations = {
+	.llseek		= generic_file_llseek,
+	.read		= linvfs_read,
+	.write		= linvfs_write,
+	.ioctl		= linvfs_ioctl,
+	.mmap		= linvfs_file_mmap,
+	.open		= linvfs_open,
+	.release	= linvfs_release,
+	.fsync		= linvfs_fsync,
+};
+
+struct file_operations linvfs_dir_operations = {
+	.read		= generic_read_dir,
+	.readdir	= linvfs_readdir,
+	.ioctl		= linvfs_ioctl,
+	.fsync		= linvfs_fsync,
+};
+
+static struct vm_operations_struct linvfs_file_vm_ops = {
+	.nopage		= filemap_nopage,
+#ifdef HAVE_VMOP_MPROTECT
+	.mprotect	= linvfs_mprotect,
+#endif
+};

fs/xfs/linux/xfs_fs_subr.c

+/*
+ * Copyright (c) 2000-2002 Silicon Graphics, Inc.  All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * Further, this software is distributed without any warranty that it is
+ * free of the rightful claim of any third person regarding infringement
+ * or the like.	 Any license provided herein, whether implied or
+ * otherwise, applies only to this software file.  Patent licenses, if
+ * any, provided herein do not apply to combinations of this program with
+ * other software, or any other product whatsoever.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write the Free Software Foundation, Inc., 59
+ * Temple Place - Suite 330, Boston MA 02111-1307, USA.
+ *
+ * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
+ * Mountain View, CA  94043, or:
+ *
+ * http://www.sgi.com
+ *
+ * For further information regarding this notice, see:
+ *
+ * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
+ */
+
+#include <xfs.h>
+
+/*
+ * Implementation for VFS_DOUNMOUNT.
+ */
+int
+fs_dounmount(
+	bhv_desc_t	*bdp,
+	int		flags,
+	vnode_t		*rootvp,
+	cred_t		*cr)
+{
+	struct vfs	*vfsp = bhvtovfs(bdp);
+	bhv_desc_t	*fbdp = vfsp->vfs_fbhv;
+	int		error;
+
+	/*
+	 * Wait for sync to finish and lock vfsp.  This also sets the
+	 * VFS_OFFLINE flag.  Once we do this we can give up reference
+	 * the root vnode which we hold to avoid the another unmount
+	 * ripping the vfs out from under us before we get to lock it.
+	 * The VFS_DOUNMOUNT calling convention is that the reference
+	 * on the rot vnode is released whether the call succeeds or
+	 * fails.
+	 */
+	if (rootvp)
+		VN_RELE(rootvp);
+
+	/*
+	 * Now invoke SYNC and UNMOUNT ops, using the PVFS versions is
+	 * OK since we already have a behavior lock as a result of
+	 * being in VFS_DOUNMOUNT.  It is necessary to do things this
+	 * way since using the VFS versions would cause us to get the
+	 * behavior lock twice which can cause deadlock as well as
+	 * making the coding of vfs relocation unnecessarilty difficult
+	 * by making relocations invoked by unmount occur in a different
+	 * environment than those invoked by mount-update.
+	 */
+	PVFS_SYNC(fbdp, SYNC_ATTR|SYNC_DELWRI, cr, error);
+	if (error == 0)
+		PVFS_UNMOUNT(fbdp, flags, cr, error);
+	return error;
+}
+
+/*
+ * Stub for no-op vnode operations that return error status.
+ */
+int
+fs_noerr()
+{
+	return 0;
+}
+
+/*
+ * Operation unsupported under this file system.
+ */
+int
+fs_nosys()
+{
+	return ENOSYS;
+}
+
+/*
+ * Stub for inactive, strategy, and read/write lock/unlock.  Does nothing.
+ */
+/* ARGSUSED */
+void
+fs_noval()
+{
+}
+
+/*
+ * vnode pcache layer for vnode_tosspages.
+ * 'last' parameter unused but left in for IRIX compatibility
+ */
+void
+fs_tosspages(
+	bhv_desc_t	*bdp,
+	xfs_off_t	first,
+	xfs_off_t	last,
+	int		fiopt)
+{
+	vnode_t		*vp = BHV_TO_VNODE(bdp);
+	struct inode	*ip = LINVFS_GET_IP(vp);
+
+	if (VN_CACHED(vp))
+		truncate_inode_pages(ip->i_mapping, first);
+}
+
+
+/*
+ * vnode pcache layer for vnode_flushinval_pages.
+ * 'last' parameter unused but left in for IRIX compatibility
+ */
+void
+fs_flushinval_pages(
+	bhv_desc_t	*bdp,
+	xfs_off_t	first,
+	xfs_off_t	last,
+	int		fiopt)
+{
+	vnode_t		*vp = BHV_TO_VNODE(bdp);
+	struct inode	*ip = LINVFS_GET_IP(vp);
+
+	if (VN_CACHED(vp)) {
+		filemap_fdatawait(ip->i_mapping);
+		filemap_fdatawrite(ip->i_mapping);
+		filemap_fdatawait(ip->i_mapping);
+
+		truncate_inode_pages(ip->i_mapping, first);
+	}
+}
+
+/*
+ * vnode pcache layer for vnode_flush_pages.
+ * 'last' parameter unused but left in for IRIX compatibility
+ */
+int
+fs_flush_pages(
+	bhv_desc_t	*bdp,
+	xfs_off_t	first,
+	xfs_off_t	last,
+	uint64_t	flags,
+	int		fiopt)
+{
+	vnode_t		*vp = BHV_TO_VNODE(bdp);
+	struct inode	*ip = LINVFS_GET_IP(vp);
+
+	if (VN_CACHED(vp)) {
+		filemap_fdatawait(ip->i_mapping);
+		filemap_fdatawrite(ip->i_mapping);
+		filemap_fdatawait(ip->i_mapping);
+	}
+
+	return 0;
+}
+

fs/xfs/linux/xfs_fs_subr.h

+/*
+ * Copyright (c) 2000, 2002 Silicon Graphics, Inc.  All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * Further, this software is distributed without any warranty that it is
+ * free of the rightful claim of any third person regarding infringement
+ * or the like.	 Any license provided herein, whether implied or
+ * otherwise, applies only to this software file.  Patent licenses, if
+ * any, provided herein do not apply to combinations of this program with
+ * other software, or any other product whatsoever.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write the Free Software Foundation, Inc., 59
+ * Temple Place - Suite 330, Boston MA 02111-1307, USA.
+ *
+ * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
+ * Mountain View, CA  94043, or:
+ *
+ * http://www.sgi.com
+ *
+ * For further information regarding this notice, see:
+ *
+ * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
+ */
+#ifndef __XFS_SUBR_H__
+#define __XFS_SUBR_H__
+
+/*
+ * Utilities shared among file system implementations.
+ */
+
+struct cred;
+
+extern int	fs_noerr(void);
+extern int	fs_nosys(void);
+extern int	fs_nodev(void);
+extern void	fs_noval(void);
+extern int	fs_dounmount(bhv_desc_t *, int, vnode_t *, struct cred *);
+extern void	fs_tosspages(bhv_desc_t *, xfs_off_t, xfs_off_t, int);
+extern void	fs_flushinval_pages(bhv_desc_t *, xfs_off_t, xfs_off_t, int);
+extern int	fs_flush_pages(bhv_desc_t *, xfs_off_t, xfs_off_t, uint64_t, int);
+
+#endif	/* __XFS_FS_SUBR_H__ */

fs/xfs/linux/xfs_globals.c

+/*
+ * Copyright (c) 2000-2002 Silicon Graphics, Inc.  All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * Further, this software is distributed without any warranty that it is
+ * free of the rightful claim of any third person regarding infringement
+ * or the like.	 Any license provided herein, whether implied or
+ * otherwise, applies only to this software file.  Patent licenses, if
+ * any, provided herein do not apply to combinations of this program with
+ * other software, or any other product whatsoever.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write the Free Software Foundation, Inc., 59
+ * Temple Place - Suite 330, Boston MA 02111-1307, USA.
+ *
+ * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
+ * Mountain View, CA  94043, or:
+ *
+ * http://www.sgi.com
+ *
+ * For further information regarding this notice, see:
+ *
+ * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
+ */
+
+/*
+ * This file contains globals needed by XFS that were normally defined
+ * somewhere else in IRIX.
+ */
+
+#include <xfs.h>
+
+uint64_t	xfs_panic_mask;		/* set to cause more panics */
+unsigned long	xfs_physmem;
+
+/*
+ * restricted_chown = 1	 bsd style chown(2), only super-user can give away files
+ * restricted_chown = 0	 sysV style chown(2), non super-user can give away files
+ */
+int		restricted_chown = 1;
+
+/*
+ * Used to serialize atomicIncWithWrap.
+ */
+spinlock_t Atomic_spin = SPIN_LOCK_UNLOCKED;
+
+/*
+ * Global system credential structure.
+ */
+cred_t sys_cred_val, *sys_cred = &sys_cred_val;
+
+/*
+ * The global quota manager. There is only one of these for the entire
+ * system, _not_ one per file system. XQM keeps track of the overall
+ * quota functionality, including maintaining the freelist and hash
+ * tables of dquots.
+ */
+struct xfs_qm	*xfs_Gqm;
+mutex_t		xfs_Gqm_lock;
+
+/* Export XFS symbols used by xfsidbg */
+EXPORT_SYMBOL(xfs_Gqm);
+EXPORT_SYMBOL(xfs_next_bit);
+EXPORT_SYMBOL(xfs_contig_bits);

fs/xfs/linux/xfs_globals.h

+/*
+ * Copyright (c) 2000-2002 Silicon Graphics, Inc.  All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * Further, this software is distributed without any warranty that it is
+ * free of the rightful claim of any third person regarding infringement
+ * or the like.	 Any license provided herein, whether implied or
+ * otherwise, applies only to this software file.  Patent licenses, if
+ * any, provided herein do not apply to combinations of this program with
+ * other software, or any other product whatsoever.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write the Free Software Foundation, Inc., 59
+ * Temple Place - Suite 330, Boston MA 02111-1307, USA.
+ *
+ * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
+ * Mountain View, CA  94043, or:
+ *
+ * http://www.sgi.com
+ *
+ * For further information regarding this notice, see:
+ *
+ * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
+ */
+#ifndef __XFS_GLOBALS_H__
+#define __XFS_GLOBALS_H__
+
+/*
+ * This file declares globals needed by XFS that were normally defined
+ * somewhere else in IRIX.
+ */
+
+extern uint64_t xfs_panic_mask;		/* set to cause more panics */
+
+extern int	restricted_chown;
+extern unsigned long	xfs_physmem;
+
+extern struct cred *sys_cred;
+
+extern struct xfs_qm	*xfs_Gqm;
+extern mutex_t		xfs_Gqm_lock;
+
+#endif	/* __XFS_GLOBALS_H__ */

fs/xfs/linux/xfs_iops.h

+/*
+ * Copyright (c) 2000-2002 Silicon Graphics, Inc.  All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * Further, this software is distributed without any warranty that it is
+ * free of the rightful claim of any third person regarding infringement
+ * or the like.	 Any license provided herein, whether implied or
+ * otherwise, applies only to this software file.  Patent licenses, if
+ * any, provided herein do not apply to combinations of this program with
+ * other software, or any other product whatsoever.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write the Free Software Foundation, Inc., 59
+ * Temple Place - Suite 330, Boston MA 02111-1307, USA.
+ *
+ * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
+ * Mountain View, CA  94043, or:
+ *
+ * http://www.sgi.com
+ *
+ * For further information regarding this notice, see:
+ *
+ * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
+ */
+#ifndef __XFS_IOPS_H__
+#define __XFS_IOPS_H__
+
+/*
+ * Extended system attributes.
+ * So far only POSIX ACLs are supported, but this will need to
+ * grow in time (capabilities, mandatory access control, etc).
+ */
+#define XFS_SYSTEM_NAMESPACE	SYSTEM_POSIXACL
+
+/*
+ * Define a table of the namespaces XFS supports
+ */
+typedef int (*xattr_exists_t)(vnode_t *);
+
+typedef struct xattr_namespace {
+	char		*name;
+	unsigned int	namelen;
+	xattr_exists_t	exists;
+} xattr_namespace_t;
+
+#define SYSTEM_NAMES	0
+#define ROOT_NAMES	1
+#define USER_NAMES	2
+extern struct xattr_namespace *xfs_namespaces;
+
+
+extern struct inode_operations linvfs_file_inode_operations;
+extern struct inode_operations linvfs_dir_inode_operations;
+extern struct inode_operations linvfs_symlink_inode_operations;
+
+extern struct file_operations linvfs_file_operations;
+extern struct file_operations linvfs_dir_operations;
+
+extern struct address_space_operations linvfs_aops;
+
+extern int linvfs_revalidate_core(struct inode *, int);
+extern int linvfs_get_block(struct inode *, sector_t, struct buffer_head *, int);
+
+#endif /* __XFS_IOPS_H__ */

fs/xfs/linux/xfs_linux.h

+/*
+ * Copyright (c) 2000-2002 Silicon Graphics, Inc.  All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * Further, this software is distributed without any warranty that it is
+ * free of the rightful claim of any third person regarding infringement
+ * or the like.	 Any license provided herein, whether implied or
+ * otherwise, applies only to this software file.  Patent licenses, if
+ * any, provided herein do not apply to combinations of this program with
+ * other software, or any other product whatsoever.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write the Free Software Foundation, Inc., 59
+ * Temple Place - Suite 330, Boston MA 02111-1307, USA.
+ *
+ * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
+ * Mountain View, CA  94043, or:
+ *
+ * http://www.sgi.com
+ *
+ * For further information regarding this notice, see:
+ *
+ * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
+ */
+#ifndef __XFS_LINUX__
+#define __XFS_LINUX__
+
+#include <linux/mm.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/file.h>
+#include <linux/swap.h>
+#include <linux/errno.h>
+#include <linux/sched.h>
+#include <linux/bitops.h>
+#include <linux/major.h>
+#include <linux/root_dev.h>
+
+#include <asm/page.h>
+#include <asm/div64.h>
+#include <asm/param.h>
+#include <asm/uaccess.h>
+#include <asm/byteorder.h>
+
+#include <linux/xfs_behavior.h>
+#include <linux/xfs_vfs.h>
+#include <linux/xfs_cred.h>
+#include <linux/xfs_vnode.h>
+#include <linux/xfs_stats.h>
+#include <linux/xfs_sysctl.h>
+#include <linux/xfs_iops.h>
+#include <linux/xfs_super.h>
+#include <linux/xfs_globals.h>
+#include <linux/xfs_fs_subr.h>
+
+#include <pagebuf/page_buf.h>
+
+#ifndef STATIC
+#define STATIC static
+#endif
+
+typedef struct xfs_dirent {		/* data from readdir() */
+	xfs_ino_t	d_ino;		/* inode number of entry */
+	xfs_off_t	d_off;		/* offset of disk directory entry */
+	unsigned short	d_reclen;	/* length of this record */
+	char		d_name[1];	/* name of file */
+} xfs_dirent_t;
+
+#define DIRENTBASESIZE		(((xfs_dirent_t *)0)->d_name - (char *)0)
+#define DIRENTSIZE(namelen)	\
+	((DIRENTBASESIZE + (namelen) + \
+		sizeof(xfs_off_t)) & ~(sizeof(xfs_off_t) - 1))
+
+#define NBPP		PAGE_SIZE
+#define DPPSHFT		(PAGE_SHIFT - 9)
+#define NDPP		(1 << (PAGE_SHIFT - 9))
+#define dtop(DD)	(((DD) + NDPP - 1) >> DPPSHFT)
+#define dtopt(DD)	((DD) >> DPPSHFT)
+#define dpoff(DD)	((DD) & (NDPP-1))
+
+#define NBBY		8		/* number of bits per byte */
+#define NBPC		PAGE_SIZE	/* Number of bytes per click */
+#define BPCSHIFT	PAGE_SHIFT	/* LOG2(NBPC) if exact */
+
+/*
+ * Size of block device i/o is parameterized here.
+ * Currently the system supports page-sized i/o.
+ */
+#define BLKDEV_IOSHIFT		BPCSHIFT
+#define BLKDEV_IOSIZE		(1<<BLKDEV_IOSHIFT)
+/* number of BB's per block device block */
+#define BLKDEV_BB		BTOBB(BLKDEV_IOSIZE)
+
+/* bytes to clicks */
+#define btoc(x)		(((__psunsigned_t)(x)+(NBPC-1))>>BPCSHIFT)
+#define btoct(x)	((__psunsigned_t)(x)>>BPCSHIFT)
+#define btoc64(x)	(((__uint64_t)(x)+(NBPC-1))>>BPCSHIFT)
+#define btoct64(x)	((__uint64_t)(x)>>BPCSHIFT)
+#define io_btoc(x)	(((__psunsigned_t)(x)+(IO_NBPC-1))>>IO_BPCSHIFT)
+#define io_btoct(x)	((__psunsigned_t)(x)>>IO_BPCSHIFT)
+
+/* off_t bytes to clicks */
+#define offtoc(x)	(((__uint64_t)(x)+(NBPC-1))>>BPCSHIFT)
+#define offtoct(x)	((xfs_off_t)(x)>>BPCSHIFT)
+
+/* clicks to off_t bytes */
+#define ctooff(x)	((xfs_off_t)(x)<<BPCSHIFT)
+
+/* clicks to bytes */
+#define ctob(x)		((__psunsigned_t)(x)<<BPCSHIFT)
+#define btoct(x)	((__psunsigned_t)(x)>>BPCSHIFT)
+#define ctob64(x)	((__uint64_t)(x)<<BPCSHIFT)
+#define io_ctob(x)	((__psunsigned_t)(x)<<IO_BPCSHIFT)
+
+/* bytes to clicks */
+#define btoc(x)		(((__psunsigned_t)(x)+(NBPC-1))>>BPCSHIFT)
+
+#ifndef CELL_CAPABLE
+#define FSC_NOTIFY_NAME_CHANGED(vp)
+#endif
+
+#ifndef ENOATTR
+#define ENOATTR		ENODATA		/* Attribute not found */
+#endif
+
+/* Note: EWRONGFS never visible outside the kernel */
+#define EWRONGFS	EINVAL		/* Mount with wrong filesystem type */
+
+/*
+ * XXX EFSCORRUPTED needs a real value in errno.h. asm-i386/errno.h won't
+ *     return codes out of its known range in errno.
+ * XXX Also note: needs to be < 1000 and fairly unique on Linux (mustn't
+ *     conflict with any code we use already or any code a driver may use)
+ * XXX Some options (currently we do #2):
+ *	1/ New error code ["Filesystem is corrupted", _after_ glibc updated]
+ *	2/ 990 ["Unknown error 990"]
+ *	3/ EUCLEAN ["Structure needs cleaning"]
+ *	4/ Convert EFSCORRUPTED to EIO [just prior to return into userspace]
+ */
+#define EFSCORRUPTED	990		/* Filesystem is corrupted */
+
+#define SYNCHRONIZE()	barrier()
+#define lbolt		jiffies
+#define rootdev		ROOT_DEV
+#define __return_address __builtin_return_address(0)
+#define LONGLONG_MAX	9223372036854775807LL	/* max "long long int" */
+#define nopkg()		( ENOSYS )
+
+/* IRIX uses a dynamic sizing algorithm (ndquot = 200 + numprocs*2) */
+/* we may well need to fine-tune this if it ever becomes an issue.  */
+#define DQUOT_MAX_HEURISTIC	1024	/* NR_DQUOTS */
+#define ndquot			DQUOT_MAX_HEURISTIC
+
+/* IRIX uses the current size of the name cache to guess a good value */
+/* - this isn't the same but is a good enough starting point for now. */
+#define DQUOT_HASH_HEURISTIC	files_stat.nr_files
+
+/* IRIX inodes maintain the project ID also, zero this field on Linux */
+#define DEFAULT_PROJID	0
+#define dfltprid	DEFAULT_PROJID
+
+#define MAXNAMELEN	256
+#define MAXPATHLEN	1024
+
+#define FINVIS		0x0100	/* don't update timestamps - XFS */
+
+#define MIN(a,b)	(min(a,b))
+#define MAX(a,b)	(max(a,b))
+#define howmany(x, y)	(((x)+((y)-1))/(y))
+#define roundup(x, y)	((((x)+((y)-1))/(y))*(y))
+
+/* Move the kernel do_div definition off to one side */
+
+#if defined __i386__
+/* For ia32 we need to pull some tricks to get past various versions
+ * of the compiler which do not like us using do_div in the middle
+ * of large functions.
+ */
+static inline __u32 xfs_do_div(void *a, __u32 b, int n)
+{
+	__u32	mod;
+
+	switch (n) {
+		case 4:
+			mod = *(__u32 *)a % b;
+			*(__u32 *)a = *(__u32 *)a / b;
+			return mod;
+		case 8:
+			{
+			unsigned long __upper, __low, __high, __mod;
+			__u64	c = *(__u64 *)a;
+			__upper = __high = c >> 32;
+			__low = c;
+			if (__high) {
+				__upper = __high % (b);
+				__high = __high / (b);
+			}
+			asm("divl %2":"=a" (__low), "=d" (__mod):"rm" (b), "0" (__low), "1" (__upper));
+			asm("":"=A" (c):"a" (__low),"d" (__high));
+			*(__u64 *)a = c;
+			return __mod;
+			}
+	}
+
+	/* NOTREACHED */
+	return 0;
+}
+
+/* Side effect free 64 bit mod operation */
+static inline __u32 xfs_do_mod(void *a, __u32 b, int n)
+{
+	switch (n) {
+		case 4:
+			return *(__u32 *)a % b;
+		case 8:
+			{
+			unsigned long __upper, __low, __high, __mod;
+			__u64	c = *(__u64 *)a;
+			__upper = __high = c >> 32;
+			__low = c;
+			if (__high) {
+				__upper = __high % (b);
+				__high = __high / (b);
+			}
+			asm("divl %2":"=a" (__low), "=d" (__mod):"rm" (b), "0" (__low), "1" (__upper));
+			asm("":"=A" (c):"a" (__low),"d" (__high));
+			return __mod;
+			}
+	}
+
+	/* NOTREACHED */
+	return 0;
+}
+#else
+static inline __u32 xfs_do_div(void *a, __u32 b, int n)
+{
+	__u32	mod;
+
+	switch (n) {
+		case 4:
+			mod = *(__u32 *)a % b;
+			*(__u32 *)a = *(__u32 *)a / b;
+			return mod;
+		case 8:
+			mod = do_div(*(__u64 *)a, b);
+			return mod;
+	}
+
+	/* NOTREACHED */
+	return 0;
+}
+
+/* Side effect free 64 bit mod operation */
+static inline __u32 xfs_do_mod(void *a, __u32 b, int n)
+{
+	switch (n) {
+		case 4:
+			return *(__u32 *)a % b;
+		case 8:
+			{
+			__u64	c = *(__u64 *)a;
+			return do_div(c, b);
+			}
+	}
+
+	/* NOTREACHED */
+	return 0;
+}
+#endif
+
+#undef do_div
+#define do_div(a, b)	xfs_do_div(&(a), (b), sizeof(a))
+#define do_mod(a, b)	xfs_do_mod(&(a), (b), sizeof(a))
+
+static inline __uint64_t roundup_64(__uint64_t x, __uint32_t y)
+{
+	x += y - 1;
+	do_div(x, y);
+	return(x * y);
+}
+
+#endif /* __XFS_LINUX__ */

fs/xfs/linux/xfs_lrw.h

+/*
+ * Copyright (c) 2000-2002 Silicon Graphics, Inc.  All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * Further, this software is distributed without any warranty that it is
+ * free of the rightful claim of any third person regarding infringement
+ * or the like.	 Any license provided herein, whether implied or
+ * otherwise, applies only to this software file.  Patent licenses, if
+ * any, provided herein do not apply to combinations of this program with
+ * other software, or any other product whatsoever.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write the Free Software Foundation, Inc., 59
+ * Temple Place - Suite 330, Boston MA 02111-1307, USA.
+ *
+ * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
+ * Mountain View, CA  94043, or:
+ *
+ * http://www.sgi.com
+ *
+ * For further information regarding this notice, see:
+ *
+ * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
+ */
+
+#ifndef __XFS_LRW_H__
+#define __XFS_LRW_H__
+
+#define XFS_IOMAP_READ_ENTER	3
+/*
+ * Maximum count of bmaps used by read and write paths.
+ */
+#define XFS_MAX_RW_NBMAPS	4
+
+extern int xfs_bmap (bhv_desc_t *, xfs_off_t, ssize_t, int, struct cred *, pb_bmap_t *, int *);
+extern int xfs_strategy (bhv_desc_t *, xfs_off_t, ssize_t, int, struct cred *, pb_bmap_t *, int *);
+extern int xfsbdstrat (struct xfs_mount *, struct xfs_buf *);
+extern int xfs_bdstrat_cb (struct xfs_buf *);
+
+extern int xfs_zero_eof (vnode_t *, struct xfs_iocore *, xfs_off_t,
+				xfs_fsize_t, xfs_fsize_t, struct pm *);
+extern ssize_t xfs_read (
+	struct bhv_desc	       *bdp,
+	struct file		*file,
+	char			*buf,
+	size_t			size,
+	loff_t			*offset,
+	struct cred	       *credp);
+
+extern ssize_t xfs_write (
+	struct bhv_desc		*bdp,
+	struct file		*file,
+	const char		*buf,
+	size_t			size,
+	loff_t			*offset,
+	struct cred		*credp);
+
+extern int xfs_recover_read_only (xlog_t *);
+extern int xfs_quotacheck_read_only (xfs_mount_t *);
+
+extern void XFS_log_write_unmount_ro (bhv_desc_t *);
+
+#define XFS_FSB_TO_DB_IO(io,fsb) \
+		(((io)->io_flags & XFS_IOCORE_RT) ? \
+		 XFS_FSB_TO_BB((io)->io_mount, (fsb)) : \
+		 XFS_FSB_TO_DADDR((io)->io_mount, (fsb)))
+
+#endif	/* __XFS_LRW_H__ */

fs/xfs/linux/xfs_stats.c

+/*
+ * Copyright (c) 2000-2001 Silicon Graphics, Inc.  All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * Further, this software is distributed without any warranty that it is
+ * free of the rightful claim of any third person regarding infringement
+ * or the like.	 Any license provided herein, whether implied or
+ * otherwise, applies only to this software file.  Patent licenses, if
+ * any, provided herein do not apply to combinations of this program with
+ * other software, or any other product whatsoever.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write the Free Software Foundation, Inc., 59
+ * Temple Place - Suite 330, Boston MA 02111-1307, USA.
+ *
+ * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
+ * Mountain View, CA  94043, or:
+ *
+ * http://www.sgi.com
+ *
+ * For further information regarding this notice, see:
+ *
+ * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
+ */
+
+#include <xfs.h>
+#include <linux/proc_fs.h>
+
+static int
+xfs_read_xfsstats(char *buffer, char **start, off_t offset,
+			int count, int *eof, void *data)
+{
+	int	i, j, len;
+	static struct xstats_entry {
+		char	*desc;
+		int	endpoint;
+	} xstats[] = {
+		{ "extent_alloc",	XFSSTAT_END_EXTENT_ALLOC	},
+		{ "abt",		XFSSTAT_END_ALLOC_BTREE		},
+		{ "blk_map",		XFSSTAT_END_BLOCK_MAPPING	},
+		{ "bmbt",		XFSSTAT_END_BLOCK_MAP_BTREE	},
+		{ "dir",		XFSSTAT_END_DIRECTORY_OPS	},
+		{ "trans",		XFSSTAT_END_TRANSACTIONS	},
+		{ "ig",			XFSSTAT_END_INODE_OPS		},
+		{ "log",		XFSSTAT_END_LOG_OPS		},
+		{ "push_ail",		XFSSTAT_END_TAIL_PUSHING	},
+		{ "xstrat",		XFSSTAT_END_WRITE_CONVERT	},
+		{ "rw",			XFSSTAT_END_READ_WRITE_OPS	},
+		{ "attr",		XFSSTAT_END_ATTRIBUTE_OPS	},
+		{ "qm",			XFSSTAT_END_QUOTA_OPS		},
+		{ "icluster",		XFSSTAT_END_INODE_CLUSTER	},
+		{ "vnodes",		XFSSTAT_END_VNODE_OPS		},
+	};
+
+	for (i=j=len = 0; i < sizeof(xstats)/sizeof(struct xstats_entry); i++) {
+		len += sprintf(buffer + len, xstats[i].desc);
+		/* inner loop does each group */
+		while (j < xstats[i].endpoint) {
+			len += sprintf(buffer + len, " %u",
+					*(((__u32*)&xfsstats) + j));
+			j++;
+		}
+		buffer[len++] = '\n';
+	}
+	/* extra precision counters */
+	len += sprintf(buffer + len, "xpc %Lu %Lu %Lu\n",
+			xfsstats.xs_xstrat_bytes,
+			xfsstats.xs_write_bytes,
+			xfsstats.xs_read_bytes);
+
+	if (offset >= len) {
+		*start = buffer;
+		*eof = 1;
+		return 0;
+	}
+	*start = buffer + offset;
+	if ((len -= offset) > count)
+		return count;
+	*eof = 1;
+
+	return len;
+}
+
+static int
+xfs_read_xfsquota(char *buffer, char **start, off_t offset,
+			int count, int *eof, void *data)
+{
+	int	len;
+
+	/* maximum; incore; ratio free to inuse; freelist */
+	len = sprintf(buffer, "%d\t%d\t%d\t%u\n",
+			ndquot,
+			xfs_Gqm? atomic_read(&xfs_Gqm->qm_totaldquots) : 0,
+			xfs_Gqm? xfs_Gqm->qm_dqfree_ratio : 0,
+			xfs_Gqm? xfs_Gqm->qm_dqfreelist.qh_nelems : 0);
+
+	if (offset >= len) {
+		*start = buffer;
+		*eof = 1;
+		return 0;
+	}
+	*start = buffer + offset;
+	if ((len -= offset) > count)
+		return count;
+	*eof = 1;
+
+	return len;
+}
+
+void
+xfs_init_procfs(void)
+{
+	if (!proc_mkdir("fs/xfs", 0))
+		return;
+	create_proc_read_entry("fs/xfs/stat", 0, 0, xfs_read_xfsstats, NULL);
+	create_proc_read_entry("fs/xfs/xqm", 0, 0, xfs_read_xfsquota, NULL);
+}
+
+void
+xfs_cleanup_procfs(void)
+{
+	remove_proc_entry("fs/xfs/stat", NULL);
+	remove_proc_entry("fs/xfs/xqm", NULL);
+	remove_proc_entry("fs/xfs", NULL);
+}