Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

10 files changed, 1191 insertions, 0 deletions

diff --git a/fs/xfs/support/debug.c b/fs/xfs/support/debug.c
new file mode 100644
index 00000000000..7d6e1f37df1
--- /dev/null
+++ b/fs/xfs/support/debug.c
@@ -0,0 +1,127 @@
+/*
+ * Copyright (c) 2000-2003 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 "debug.h"
+
+#include <asm/page.h>
+#include <linux/sched.h>
+#include <linux/kernel.h>
+
+int			doass = 1;
+static char		message[256];	/* keep it off the stack */
+static DEFINE_SPINLOCK(xfs_err_lock);
+
+/* Translate from CE_FOO to KERN_FOO, err_level(CE_FOO) == KERN_FOO */
+#define XFS_MAX_ERR_LEVEL	7
+#define XFS_ERR_MASK		((1 << 3) - 1)
+static char		*err_level[XFS_MAX_ERR_LEVEL+1] =
+					{KERN_EMERG, KERN_ALERT, KERN_CRIT,
+					 KERN_ERR, KERN_WARNING, KERN_NOTICE,
+					 KERN_INFO, KERN_DEBUG};
+
+void
+assfail(char *a, char *f, int l)
+{
+    printk("XFS assertion failed: %s, file: %s, line: %d\n", a, f, l);
+    BUG();
+}
+
+#if ((defined(DEBUG) || defined(INDUCE_IO_ERRROR)) && !defined(NO_WANT_RANDOM))
+
+unsigned long
+random(void)
+{
+	static unsigned long	RandomValue = 1;
+	/* cycles pseudo-randomly through all values between 1 and 2^31 - 2 */
+	register long	rv = RandomValue;
+	register long	lo;
+	register long	hi;
+
+	hi = rv / 127773;
+	lo = rv % 127773;
+	rv = 16807 * lo - 2836 * hi;
+	if( rv <= 0 ) rv += 2147483647;
+	return( RandomValue = rv );
+}
+
+int
+get_thread_id(void)
+{
+	return current->pid;
+}
+
+#endif /* DEBUG || INDUCE_IO_ERRROR || !NO_WANT_RANDOM */
+
+void
+cmn_err(register int level, char *fmt, ...)
+{
+	char	*fp = fmt;
+	int	len;
+	ulong	flags;
+	va_list	ap;
+
+	level &= XFS_ERR_MASK;
+	if (level > XFS_MAX_ERR_LEVEL)
+		level = XFS_MAX_ERR_LEVEL;
+	spin_lock_irqsave(&xfs_err_lock,flags);
+	va_start(ap, fmt);
+	if (*fmt == '!') fp++;
+	len = vsprintf(message, fp, ap);
+	if (message[len-1] != '\n')
+		strcat(message, "\n");
+	printk("%s%s", err_level[level], message);
+	va_end(ap);
+	spin_unlock_irqrestore(&xfs_err_lock,flags);
+
+	if (level == CE_PANIC)
+		BUG();
+}
+
+
+void
+icmn_err(register int level, char *fmt, va_list ap)
+{
+	ulong	flags;
+	int	len;
+
+	level &= XFS_ERR_MASK;
+	if(level > XFS_MAX_ERR_LEVEL)
+		level = XFS_MAX_ERR_LEVEL;
+	spin_lock_irqsave(&xfs_err_lock,flags);
+	len = vsprintf(message, fmt, ap);
+	if (message[len-1] != '\n')
+		strcat(message, "\n");
+	spin_unlock_irqrestore(&xfs_err_lock,flags);
+	printk("%s%s", err_level[level], message);
+	if (level == CE_PANIC)
+		BUG();
+}
diff --git a/fs/xfs/support/debug.h b/fs/xfs/support/debug.h
new file mode 100644
index 00000000000..40b0f4c54d9
--- /dev/null
+++ b/fs/xfs/support/debug.h
@@ -0,0 +1,72 @@
+/*
+ * Copyright (c) 2000-2004 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_SUPPORT_DEBUG_H__
+#define	__XFS_SUPPORT_DEBUG_H__
+
+#include <stdarg.h>
+
+#define CE_DEBUG        7               /* debug        */
+#define CE_CONT         6               /* continuation */
+#define CE_NOTE         5               /* notice       */
+#define CE_WARN         4               /* warning      */
+#define CE_ALERT        1               /* alert        */
+#define CE_PANIC        0               /* panic        */
+
+extern void icmn_err(int, char *, va_list);
+/* PRINTFLIKE2 */
+extern void cmn_err(int, char *, ...);
+
+#ifndef STATIC
+# define STATIC static
+#endif
+
+#ifdef DEBUG
+# ifdef lint
+#  define ASSERT(EX)	((void)0) /* avoid "constant in conditional" babble */
+# else
+#  define ASSERT(EX) ((!doass||(EX))?((void)0):assfail(#EX, __FILE__, __LINE__))
+# endif	/* lint */
+#else
+# define ASSERT(x)	((void)0)
+#endif
+
+extern int doass;		/* dynamically turn off asserts */
+extern void assfail(char *, char *, int);
+#ifdef DEBUG
+extern unsigned long random(void);
+extern int get_thread_id(void);
+#endif
+
+#define ASSERT_ALWAYS(EX)  ((EX)?((void)0):assfail(#EX, __FILE__, __LINE__))
+#define	debug_stop_all_cpus(param)	/* param is "cpumask_t *" */
+
+#endif  /* __XFS_SUPPORT_DEBUG_H__ */
diff --git a/fs/xfs/support/ktrace.c b/fs/xfs/support/ktrace.c
new file mode 100644
index 00000000000..3dae14c8c55
--- /dev/null
+++ b/fs/xfs/support/ktrace.c
@@ -0,0 +1,346 @@
+/*
+ * Copyright (c) 2000-2003 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>
+
+static kmem_zone_t *ktrace_hdr_zone;
+static kmem_zone_t *ktrace_ent_zone;
+static int          ktrace_zentries;
+
+void
+ktrace_init(int zentries)
+{
+	ktrace_zentries = zentries;
+
+	ktrace_hdr_zone = kmem_zone_init(sizeof(ktrace_t),
+					"ktrace_hdr");
+	ASSERT(ktrace_hdr_zone);
+
+	ktrace_ent_zone = kmem_zone_init(ktrace_zentries
+					* sizeof(ktrace_entry_t),
+					"ktrace_ent");
+	ASSERT(ktrace_ent_zone);
+}
+
+void
+ktrace_uninit(void)
+{
+	kmem_cache_destroy(ktrace_hdr_zone);
+	kmem_cache_destroy(ktrace_ent_zone);
+}
+
+/*
+ * ktrace_alloc()
+ *
+ * Allocate a ktrace header and enough buffering for the given
+ * number of entries.
+ */
+ktrace_t *
+ktrace_alloc(int nentries, int sleep)
+{
+	ktrace_t        *ktp;
+	ktrace_entry_t  *ktep;
+
+	ktp = (ktrace_t*)kmem_zone_alloc(ktrace_hdr_zone, sleep);
+
+	if (ktp == (ktrace_t*)NULL) {
+		/*
+		 * KM_SLEEP callers don't expect failure.
+		 */
+		if (sleep & KM_SLEEP)
+			panic("ktrace_alloc: NULL memory on KM_SLEEP request!");
+
+		return NULL;
+	}
+
+	/*
+	 * Special treatment for buffers with the ktrace_zentries entries
+	 */
+	if (nentries == ktrace_zentries) {
+		ktep = (ktrace_entry_t*)kmem_zone_zalloc(ktrace_ent_zone,
+							    sleep);
+	} else {
+		ktep = (ktrace_entry_t*)kmem_zalloc((nentries * sizeof(*ktep)),
+							    sleep);
+	}
+
+	if (ktep == NULL) {
+		/*
+		 * KM_SLEEP callers don't expect failure.
+		 */
+		if (sleep & KM_SLEEP)
+			panic("ktrace_alloc: NULL memory on KM_SLEEP request!");
+
+		kmem_free(ktp, sizeof(*ktp));
+
+		return NULL;
+	}
+
+	spinlock_init(&(ktp->kt_lock), "kt_lock");
+
+	ktp->kt_entries  = ktep;
+	ktp->kt_nentries = nentries;
+	ktp->kt_index    = 0;
+	ktp->kt_rollover = 0;
+	return ktp;
+}
+
+
+/*
+ * ktrace_free()
+ *
+ * Free up the ktrace header and buffer.  It is up to the caller
+ * to ensure that no-one is referencing it.
+ */
+void
+ktrace_free(ktrace_t *ktp)
+{
+	int     entries_size;
+
+	if (ktp == (ktrace_t *)NULL)
+		return;
+
+	spinlock_destroy(&ktp->kt_lock);
+
+	/*
+	 * Special treatment for the Vnode trace buffer.
+	 */
+	if (ktp->kt_nentries == ktrace_zentries) {
+		kmem_zone_free(ktrace_ent_zone, ktp->kt_entries);
+	} else {
+		entries_size = (int)(ktp->kt_nentries * sizeof(ktrace_entry_t));
+
+		kmem_free(ktp->kt_entries, entries_size);
+	}
+
+	kmem_zone_free(ktrace_hdr_zone, ktp);
+}
+
+
+/*
+ * Enter the given values into the "next" entry in the trace buffer.
+ * kt_index is always the index of the next entry to be filled.
+ */
+void
+ktrace_enter(
+	ktrace_t        *ktp,
+	void            *val0,
+	void            *val1,
+	void            *val2,
+	void            *val3,
+	void            *val4,
+	void            *val5,
+	void            *val6,
+	void            *val7,
+	void            *val8,
+	void            *val9,
+	void            *val10,
+	void            *val11,
+	void            *val12,
+	void            *val13,
+	void            *val14,
+	void            *val15)
+{
+	static lock_t   wrap_lock = SPIN_LOCK_UNLOCKED;
+	unsigned long	flags;
+	int             index;
+	ktrace_entry_t  *ktep;
+
+	ASSERT(ktp != NULL);
+
+	/*
+	 * Grab an entry by pushing the index up to the next one.
+	 */
+	spin_lock_irqsave(&wrap_lock, flags);
+	index = ktp->kt_index;
+	if (++ktp->kt_index == ktp->kt_nentries)
+		ktp->kt_index = 0;
+	spin_unlock_irqrestore(&wrap_lock, flags);
+
+	if (!ktp->kt_rollover && index == ktp->kt_nentries - 1)
+		ktp->kt_rollover = 1;
+
+	ASSERT((index >= 0) && (index < ktp->kt_nentries));
+
+	ktep = &(ktp->kt_entries[index]);
+
+	ktep->val[0]  = val0;
+	ktep->val[1]  = val1;
+	ktep->val[2]  = val2;
+	ktep->val[3]  = val3;
+	ktep->val[4]  = val4;
+	ktep->val[5]  = val5;
+	ktep->val[6]  = val6;
+	ktep->val[7]  = val7;
+	ktep->val[8]  = val8;
+	ktep->val[9]  = val9;
+	ktep->val[10] = val10;
+	ktep->val[11] = val11;
+	ktep->val[12] = val12;
+	ktep->val[13] = val13;
+	ktep->val[14] = val14;
+	ktep->val[15] = val15;
+}
+
+/*
+ * Return the number of entries in the trace buffer.
+ */
+int
+ktrace_nentries(
+	ktrace_t        *ktp)
+{
+	if (ktp == NULL) {
+		return 0;
+	}
+
+	return (ktp->kt_rollover ? ktp->kt_nentries : ktp->kt_index);
+}
+
+/*
+ * ktrace_first()
+ *
+ * This is used to find the start of the trace buffer.
+ * In conjunction with ktrace_next() it can be used to
+ * iterate through the entire trace buffer.  This code does
+ * not do any locking because it is assumed that it is called
+ * from the debugger.
+ *
+ * The caller must pass in a pointer to a ktrace_snap
+ * structure in which we will keep some state used to
+ * iterate through the buffer.  This state must not touched
+ * by any code outside of this module.
+ */
+ktrace_entry_t *
+ktrace_first(ktrace_t   *ktp, ktrace_snap_t     *ktsp)
+{
+	ktrace_entry_t  *ktep;
+	int             index;
+	int             nentries;
+
+	if (ktp->kt_rollover)
+		index = ktp->kt_index;
+	else
+		index = 0;
+
+	ktsp->ks_start = index;
+	ktep = &(ktp->kt_entries[index]);
+
+	nentries = ktrace_nentries(ktp);
+	index++;
+	if (index < nentries) {
+		ktsp->ks_index = index;
+	} else {
+		ktsp->ks_index = 0;
+		if (index > nentries)
+			ktep = NULL;
+	}
+	return ktep;
+}
+
+/*
+ * ktrace_next()
+ *
+ * This is used to iterate through the entries of the given
+ * trace buffer.  The caller must pass in the ktrace_snap_t
+ * structure initialized by ktrace_first().  The return value
+ * will be either a pointer to the next ktrace_entry or NULL
+ * if all of the entries have been traversed.
+ */
+ktrace_entry_t *
+ktrace_next(
+	ktrace_t        *ktp,
+	ktrace_snap_t   *ktsp)
+{
+	int             index;
+	ktrace_entry_t  *ktep;
+
+	index = ktsp->ks_index;
+	if (index == ktsp->ks_start) {
+		ktep = NULL;
+	} else {
+		ktep = &ktp->kt_entries[index];
+	}
+
+	index++;
+	if (index == ktrace_nentries(ktp)) {
+		ktsp->ks_index = 0;
+	} else {
+		ktsp->ks_index = index;
+	}
+
+	return ktep;
+}
+
+/*
+ * ktrace_skip()
+ *
+ * Skip the next "count" entries and return the entry after that.
+ * Return NULL if this causes us to iterate past the beginning again.
+ */
+ktrace_entry_t *
+ktrace_skip(
+	ktrace_t        *ktp,
+	int             count,
+	ktrace_snap_t   *ktsp)
+{
+	int             index;
+	int             new_index;
+	ktrace_entry_t  *ktep;
+	int             nentries = ktrace_nentries(ktp);
+
+	index = ktsp->ks_index;
+	new_index = index + count;
+	while (new_index >= nentries) {
+		new_index -= nentries;
+	}
+	if (index == ktsp->ks_start) {
+		/*
+		 * We've iterated around to the start, so we're done.
+		 */
+		ktep = NULL;
+	} else if ((new_index < index) && (index < ktsp->ks_index)) {
+		/*
+		 * We've skipped past the start again, so we're done.
+		 */
+		ktep = NULL;
+		ktsp->ks_index = ktsp->ks_start;
+	} else {
+		ktep = &(ktp->kt_entries[new_index]);
+		new_index++;
+		if (new_index == nentries) {
+			ktsp->ks_index = 0;
+		} else {
+			ktsp->ks_index = new_index;
+		}
+	}
+	return ktep;
+}
diff --git a/fs/xfs/support/ktrace.h b/fs/xfs/support/ktrace.h
new file mode 100644
index 00000000000..92d1a1a5d04
--- /dev/null
+++ b/fs/xfs/support/ktrace.h
@@ -0,0 +1,101 @@
+/*
+ * Copyright (c) 2000-2003 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_SUPPORT_KTRACE_H__
+#define __XFS_SUPPORT_KTRACE_H__
+
+#include <spin.h>
+
+/*
+ * Trace buffer entry structure.
+ */
+typedef struct ktrace_entry {
+	void	*val[16];
+} ktrace_entry_t;
+
+/*
+ * Trace buffer header structure.
+ */
+typedef struct ktrace {
+	lock_t		kt_lock;	/* mutex to guard counters */
+	int		kt_nentries;	/* number of entries in trace buf */
+	int		kt_index;	/* current index in entries */
+	int		kt_rollover;
+	ktrace_entry_t	*kt_entries;	/* buffer of entries */
+} ktrace_t;
+
+/*
+ * Trace buffer snapshot structure.
+ */
+typedef struct ktrace_snap {
+	int		ks_start;	/* kt_index at time of snap */
+	int		ks_index;	/* current index */
+} ktrace_snap_t;
+
+
+#ifdef CONFIG_XFS_TRACE
+
+extern void ktrace_init(int zentries);
+extern void ktrace_uninit(void);
+
+extern ktrace_t *ktrace_alloc(int, int);
+extern void ktrace_free(ktrace_t *);
+
+extern void ktrace_enter(
+	ktrace_t	*,
+	void		*,
+	void		*,
+	void		*,
+	void		*,
+	void		*,
+	void		*,
+	void		*,
+	void		*,
+	void		*,
+	void		*,
+	void		*,
+	void		*,
+	void		*,
+	void		*,
+	void		*,
+	void		*);
+
+extern ktrace_entry_t   *ktrace_first(ktrace_t *, ktrace_snap_t *);
+extern int              ktrace_nentries(ktrace_t *);
+extern ktrace_entry_t   *ktrace_next(ktrace_t *, ktrace_snap_t *);
+extern ktrace_entry_t   *ktrace_skip(ktrace_t *, int, ktrace_snap_t *);
+
+#else
+#define ktrace_init(x)	do { } while (0)
+#define ktrace_uninit()	do { } while (0)
+#endif	/* CONFIG_XFS_TRACE */
+
+#endif	/* __XFS_SUPPORT_KTRACE_H__ */
diff --git a/fs/xfs/support/move.c b/fs/xfs/support/move.c
new file mode 100644
index 00000000000..15b5194f16b
--- /dev/null
+++ b/fs/xfs/support/move.c
@@ -0,0 +1,66 @@
+/*
+ * Copyright (c) 2000-2003 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>
+
+/* Read from kernel buffer at src to user/kernel buffer defined
+ * by the uio structure. Advance the pointer in the uio struct
+ * as we go.
+ */
+int
+uio_read(caddr_t src, size_t len, struct uio *uio)
+{
+	size_t	count;
+
+	if (!len || !uio->uio_resid)
+		return 0;
+
+	count = uio->uio_iov->iov_len;
+	if (!count)
+		return 0;
+	if (count > len)
+		count = len;
+
+	if (uio->uio_segflg == UIO_USERSPACE) {
+		if (copy_to_user(uio->uio_iov->iov_base, src, count))
+			return EFAULT;
+	} else {
+		ASSERT(uio->uio_segflg == UIO_SYSSPACE);
+		memcpy(uio->uio_iov->iov_base, src, count);
+	}
+
+	uio->uio_iov->iov_base = (void*)((char*)uio->uio_iov->iov_base + count);
+	uio->uio_iov->iov_len -= count;
+	uio->uio_offset += count;
+	uio->uio_resid -= count;
+	return 0;
+}
diff --git a/fs/xfs/support/move.h b/fs/xfs/support/move.h
new file mode 100644
index 00000000000..3d406dc1c89
--- /dev/null
+++ b/fs/xfs/support/move.h
@@ -0,0 +1,84 @@
+/*
+ * Copyright (c) 2000-2003 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/
+ * 
+ * Portions Copyright (c) 1982, 1986, 1993, 1994
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+#ifndef __XFS_SUPPORT_MOVE_H__
+#define __XFS_SUPPORT_MOVE_H__
+
+#include <linux/uio.h>
+#include <asm/uaccess.h>
+
+/* Segment flag values. */
+enum uio_seg {
+	UIO_USERSPACE,          /* from user data space */
+	UIO_SYSSPACE,           /* from system space */
+};
+
+struct uio {
+	struct iovec	*uio_iov;   /* pointer to array of iovecs */
+	int		uio_iovcnt; /* number of iovecs in array */
+	xfs_off_t	uio_offset; /* offset in file this uio corresponds to */
+	int		uio_resid;  /* residual i/o count */
+	enum uio_seg	uio_segflg; /* see above */
+};
+
+typedef struct uio uio_t;
+typedef struct iovec iovec_t;
+
+extern int	uio_read (caddr_t, size_t, uio_t *);
+
+#endif  /* __XFS_SUPPORT_MOVE_H__ */
diff --git a/fs/xfs/support/qsort.c b/fs/xfs/support/qsort.c
new file mode 100644
index 00000000000..1ec824140cf
--- /dev/null
+++ b/fs/xfs/support/qsort.c
@@ -0,0 +1,155 @@
+/*
+ * Copyright (c) 1992, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <linux/kernel.h>
+#include <linux/string.h>
+
+/*
+ * Qsort routine from Bentley & McIlroy's "Engineering a Sort Function".
+ */
+#define swapcode(TYPE, parmi, parmj, n) { 		\
+	long i = (n) / sizeof (TYPE); 			\
+	register TYPE *pi = (TYPE *) (parmi); 		\
+	register TYPE *pj = (TYPE *) (parmj); 		\
+	do { 						\
+		register TYPE	t = *pi;		\
+		*pi++ = *pj;				\
+		*pj++ = t;				\
+        } while (--i > 0);				\
+}
+
+#define SWAPINIT(a, es) swaptype = ((char *)a - (char *)0) % sizeof(long) || \
+	es % sizeof(long) ? 2 : es == sizeof(long)? 0 : 1;
+
+static __inline void
+swapfunc(char *a, char *b, int n, int swaptype)
+{
+	if (swaptype <= 1) 
+		swapcode(long, a, b, n)
+	else
+		swapcode(char, a, b, n)
+}
+
+#define swap(a, b)					\
+	if (swaptype == 0) {				\
+		long t = *(long *)(a);			\
+		*(long *)(a) = *(long *)(b);		\
+		*(long *)(b) = t;			\
+	} else						\
+		swapfunc(a, b, es, swaptype)
+
+#define vecswap(a, b, n) 	if ((n) > 0) swapfunc(a, b, n, swaptype)
+
+static __inline char *
+med3(char *a, char *b, char *c, int (*cmp)(const void *, const void *))
+{
+	return cmp(a, b) < 0 ?
+	       (cmp(b, c) < 0 ? b : (cmp(a, c) < 0 ? c : a ))
+              :(cmp(b, c) > 0 ? b : (cmp(a, c) < 0 ? a : c ));
+}
+
+void
+qsort(void *aa, size_t n, size_t es, int (*cmp)(const void *, const void *))
+{
+	char *pa, *pb, *pc, *pd, *pl, *pm, *pn;
+	int d, r, swaptype, swap_cnt;
+	register char *a = aa;
+
+loop:	SWAPINIT(a, es);
+	swap_cnt = 0;
+	if (n < 7) {
+		for (pm = (char *)a + es; pm < (char *) a + n * es; pm += es)
+			for (pl = pm; pl > (char *) a && cmp(pl - es, pl) > 0;
+			     pl -= es)
+				swap(pl, pl - es);
+		return;
+	}
+	pm = (char *)a + (n / 2) * es;
+	if (n > 7) {
+		pl = (char *)a;
+		pn = (char *)a + (n - 1) * es;
+		if (n > 40) {
+			d = (n / 8) * es;
+			pl = med3(pl, pl + d, pl + 2 * d, cmp);
+			pm = med3(pm - d, pm, pm + d, cmp);
+			pn = med3(pn - 2 * d, pn - d, pn, cmp);
+		}
+		pm = med3(pl, pm, pn, cmp);
+	}
+	swap(a, pm);
+	pa = pb = (char *)a + es;
+
+	pc = pd = (char *)a + (n - 1) * es;
+	for (;;) {
+		while (pb <= pc && (r = cmp(pb, a)) <= 0) {
+			if (r == 0) {
+				swap_cnt = 1;
+				swap(pa, pb);
+				pa += es;
+			}
+			pb += es;
+		}
+		while (pb <= pc && (r = cmp(pc, a)) >= 0) {
+			if (r == 0) {
+				swap_cnt = 1;
+				swap(pc, pd);
+				pd -= es;
+			}
+			pc -= es;
+		}
+		if (pb > pc)
+			break;
+		swap(pb, pc);
+		swap_cnt = 1;
+		pb += es;
+		pc -= es;
+	}
+	if (swap_cnt == 0) {  /* Switch to insertion sort */
+		for (pm = (char *) a + es; pm < (char *) a + n * es; pm += es)
+			for (pl = pm; pl > (char *) a && cmp(pl - es, pl) > 0; 
+			     pl -= es)
+				swap(pl, pl - es);
+		return;
+	}
+
+	pn = (char *)a + n * es;
+	r = min(pa - (char *)a, pb - pa);
+	vecswap(a, pb - r, r);
+	r = min((long)(pd - pc), (long)(pn - pd - es));
+	vecswap(pb, pn - r, r);
+	if ((r = pb - pa) > es)
+		qsort(a, r / es, es, cmp);
+	if ((r = pd - pc) > es) { 
+		/* Iterate rather than recurse to save stack space */
+		a = pn - r;
+		n = r / es;
+		goto loop;
+	}
+/*		qsort(pn - r, r / es, es, cmp);*/
+}
diff --git a/fs/xfs/support/qsort.h b/fs/xfs/support/qsort.h
new file mode 100644
index 00000000000..94263106d71
--- /dev/null
+++ b/fs/xfs/support/qsort.h
@@ -0,0 +1,41 @@
+/*
+ * 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 QSORT_H
+#define QSORT_H
+
+extern void qsort (void *const pbase,
+		    size_t total_elems,
+		    size_t size,
+		    int (*cmp)(const void *, const void *));
+
+#endif
diff --git a/fs/xfs/support/uuid.c b/fs/xfs/support/uuid.c
new file mode 100644
index 00000000000..81f40cfcb26
--- /dev/null
+++ b/fs/xfs/support/uuid.c
@@ -0,0 +1,151 @@
+/*
+ * Copyright (c) 2000-2003 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>
+
+static mutex_t	uuid_monitor;
+static int	uuid_table_size;
+static uuid_t	*uuid_table;
+
+void
+uuid_init(void)
+{
+	mutex_init(&uuid_monitor, MUTEX_DEFAULT, "uuid_monitor");
+}
+
+/*
+ * uuid_getnodeuniq - obtain the node unique fields of a UUID.
+ *
+ * This is not in any way a standard or condoned UUID function;
+ * it just something that's needed for user-level file handles.
+ */
+void
+uuid_getnodeuniq(uuid_t *uuid, int fsid [2])
+{
+	char	*uu = (char *)uuid;
+
+	/* on IRIX, this function assumes big-endian fields within
+	 * the uuid, so we use INT_GET to get the same result on
+	 * little-endian systems
+	 */
+
+	fsid[0] = (INT_GET(*(u_int16_t*)(uu+8), ARCH_CONVERT) << 16) +
+		   INT_GET(*(u_int16_t*)(uu+4), ARCH_CONVERT);
+	fsid[1] =  INT_GET(*(u_int32_t*)(uu  ), ARCH_CONVERT);
+}
+
+void
+uuid_create_nil(uuid_t *uuid)
+{
+	memset(uuid, 0, sizeof(*uuid));
+}
+
+int
+uuid_is_nil(uuid_t *uuid)
+{
+	int	i;
+	char	*cp = (char *)uuid;
+
+	if (uuid == NULL)
+		return 0;
+	/* implied check of version number here... */
+	for (i = 0; i < sizeof *uuid; i++)
+		if (*cp++) return 0;	/* not nil */
+	return 1;	/* is nil */
+}
+
+int
+uuid_equal(uuid_t *uuid1, uuid_t *uuid2)
+{
+	return memcmp(uuid1, uuid2, sizeof(uuid_t)) ? 0 : 1;
+}
+
+/*
+ * Given a 128-bit uuid, return a 64-bit value by adding the top and bottom
+ * 64-bit words.  NOTE: This function can not be changed EVER.  Although
+ * brain-dead, some applications depend on this 64-bit value remaining
+ * persistent.  Specifically, DMI vendors store the value as a persistent
+ * filehandle.
+ */
+__uint64_t
+uuid_hash64(uuid_t *uuid)
+{
+	__uint64_t	*sp = (__uint64_t *)uuid;
+
+	return sp[0] + sp[1];
+}
+
+int
+uuid_table_insert(uuid_t *uuid)
+{
+	int	i, hole;
+
+	mutex_lock(&uuid_monitor, PVFS);
+	for (i = 0, hole = -1; i < uuid_table_size; i++) {
+		if (uuid_is_nil(&uuid_table[i])) {
+			hole = i;
+			continue;
+		}
+		if (uuid_equal(uuid, &uuid_table[i])) {
+			mutex_unlock(&uuid_monitor);
+			return 0;
+		}
+	}
+	if (hole < 0) {
+		uuid_table = kmem_realloc(uuid_table,
+			(uuid_table_size + 1) * sizeof(*uuid_table),
+			uuid_table_size  * sizeof(*uuid_table),
+			KM_SLEEP);
+		hole = uuid_table_size++;
+	}
+	uuid_table[hole] = *uuid;
+	mutex_unlock(&uuid_monitor);
+	return 1;
+}
+
+void
+uuid_table_remove(uuid_t *uuid)
+{
+	int	i;
+
+	mutex_lock(&uuid_monitor, PVFS);
+	for (i = 0; i < uuid_table_size; i++) {
+		if (uuid_is_nil(&uuid_table[i]))
+			continue;
+		if (!uuid_equal(uuid, &uuid_table[i]))
+			continue;
+		uuid_create_nil(&uuid_table[i]);
+		break;
+	}
+	ASSERT(i < uuid_table_size);
+	mutex_unlock(&uuid_monitor);
+}
diff --git a/fs/xfs/support/uuid.h b/fs/xfs/support/uuid.h
new file mode 100644
index 00000000000..5220ea58ba2
--- /dev/null
+++ b/fs/xfs/support/uuid.h
@@ -0,0 +1,48 @@
+/*
+ * Copyright (c) 2000-2003 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_SUPPORT_UUID_H__
+#define __XFS_SUPPORT_UUID_H__
+
+typedef struct {
+	unsigned char	__u_bits[16];
+} uuid_t;
+
+void uuid_init(void);
+void uuid_create_nil(uuid_t *uuid);
+int uuid_is_nil(uuid_t *uuid);
+int uuid_equal(uuid_t *uuid1, uuid_t *uuid2);
+void uuid_getnodeuniq(uuid_t *uuid, int fsid [2]);
+__uint64_t uuid_hash64(uuid_t *uuid);
+int uuid_table_insert(uuid_t *uuid);
+void uuid_table_remove(uuid_t *uuid);
+
+#endif	/* __XFS_SUPPORT_UUID_H__ */