Linux-2.6.12-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!

1 files changed, 3050 insertions, 0 deletions

diff --git a/fs/xfs/xfs_attr_leaf.c b/fs/xfs/xfs_attr_leaf.c
new file mode 100644
index 00000000000..b11256e58bf
--- /dev/null
+++ b/fs/xfs/xfs_attr_leaf.c
@@ -0,0 +1,3050 @@
+/*
+ * 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/
+ */
+/*
+ * xfs_attr_leaf.c
+ *
+ * GROT: figure out how to recover gracefully when bmap returns ENOSPC.
+ */
+
+#include "xfs.h"
+
+#include "xfs_macros.h"
+#include "xfs_types.h"
+#include "xfs_inum.h"
+#include "xfs_log.h"
+#include "xfs_trans.h"
+#include "xfs_sb.h"
+#include "xfs_ag.h"
+#include "xfs_dir.h"
+#include "xfs_dir2.h"
+#include "xfs_dmapi.h"
+#include "xfs_mount.h"
+#include "xfs_alloc_btree.h"
+#include "xfs_bmap_btree.h"
+#include "xfs_ialloc_btree.h"
+#include "xfs_alloc.h"
+#include "xfs_btree.h"
+#include "xfs_attr_sf.h"
+#include "xfs_dir_sf.h"
+#include "xfs_dir2_sf.h"
+#include "xfs_dinode.h"
+#include "xfs_inode_item.h"
+#include "xfs_inode.h"
+#include "xfs_bmap.h"
+#include "xfs_da_btree.h"
+#include "xfs_attr.h"
+#include "xfs_attr_leaf.h"
+#include "xfs_error.h"
+#include "xfs_bit.h"
+
+/*
+ * xfs_attr_leaf.c
+ *
+ * Routines to implement leaf blocks of attributes as Btrees of hashed names.
+ */
+
+/*========================================================================
+ * Function prototypes for the kernel.
+ *========================================================================*/
+
+/*
+ * Routines used for growing the Btree.
+ */
+STATIC int xfs_attr_leaf_add_work(xfs_dabuf_t *leaf_buffer, xfs_da_args_t *args,
+					      int freemap_index);
+STATIC void xfs_attr_leaf_compact(xfs_trans_t *trans, xfs_dabuf_t *leaf_buffer);
+STATIC void xfs_attr_leaf_rebalance(xfs_da_state_t *state,
+						   xfs_da_state_blk_t *blk1,
+						   xfs_da_state_blk_t *blk2);
+STATIC int xfs_attr_leaf_figure_balance(xfs_da_state_t *state,
+					   xfs_da_state_blk_t *leaf_blk_1,
+					   xfs_da_state_blk_t *leaf_blk_2,
+					   int *number_entries_in_blk1,
+					   int *number_usedbytes_in_blk1);
+
+/*
+ * Utility routines.
+ */
+STATIC void xfs_attr_leaf_moveents(xfs_attr_leafblock_t *src_leaf,
+					 int src_start,
+					 xfs_attr_leafblock_t *dst_leaf,
+					 int dst_start, int move_count,
+					 xfs_mount_t *mp);
+
+
+/*========================================================================
+ * External routines when dirsize < XFS_LITINO(mp).
+ *========================================================================*/
+
+/*
+ * Create the initial contents of a shortform attribute list.
+ */
+int
+xfs_attr_shortform_create(xfs_da_args_t *args)
+{
+	xfs_attr_sf_hdr_t *hdr;
+	xfs_inode_t *dp;
+	xfs_ifork_t *ifp;
+
+	dp = args->dp;
+	ASSERT(dp != NULL);
+	ifp = dp->i_afp;
+	ASSERT(ifp != NULL);
+	ASSERT(ifp->if_bytes == 0);
+	if (dp->i_d.di_aformat == XFS_DINODE_FMT_EXTENTS) {
+		ifp->if_flags &= ~XFS_IFEXTENTS;	/* just in case */
+		dp->i_d.di_aformat = XFS_DINODE_FMT_LOCAL;
+		ifp->if_flags |= XFS_IFINLINE;
+	} else {
+		ASSERT(ifp->if_flags & XFS_IFINLINE);
+	}
+	xfs_idata_realloc(dp, sizeof(*hdr), XFS_ATTR_FORK);
+	hdr = (xfs_attr_sf_hdr_t *)ifp->if_u1.if_data;
+	hdr->count = 0;
+	INT_SET(hdr->totsize, ARCH_CONVERT, sizeof(*hdr));
+	xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_ADATA);
+	return(0);
+}
+
+/*
+ * Add a name/value pair to the shortform attribute list.
+ * Overflow from the inode has already been checked for.
+ */
+int
+xfs_attr_shortform_add(xfs_da_args_t *args)
+{
+	xfs_attr_shortform_t *sf;
+	xfs_attr_sf_entry_t *sfe;
+	int i, offset, size;
+	xfs_inode_t *dp;
+	xfs_ifork_t *ifp;
+
+	dp = args->dp;
+	ifp = dp->i_afp;
+	ASSERT(ifp->if_flags & XFS_IFINLINE);
+	sf = (xfs_attr_shortform_t *)ifp->if_u1.if_data;
+	sfe = &sf->list[0];
+	for (i = 0; i < INT_GET(sf->hdr.count, ARCH_CONVERT);
+				sfe = XFS_ATTR_SF_NEXTENTRY(sfe), i++) {
+		if (sfe->namelen != args->namelen)
+			continue;
+		if (memcmp(args->name, sfe->nameval, args->namelen) != 0)
+			continue;
+		if (((args->flags & ATTR_SECURE) != 0) !=
+		    ((sfe->flags & XFS_ATTR_SECURE) != 0))
+			continue;
+		if (((args->flags & ATTR_ROOT) != 0) !=
+		    ((sfe->flags & XFS_ATTR_ROOT) != 0))
+			continue;
+		return(XFS_ERROR(EEXIST));
+	}
+
+	offset = (char *)sfe - (char *)sf;
+	size = XFS_ATTR_SF_ENTSIZE_BYNAME(args->namelen, args->valuelen);
+	xfs_idata_realloc(dp, size, XFS_ATTR_FORK);
+	sf = (xfs_attr_shortform_t *)ifp->if_u1.if_data;
+	sfe = (xfs_attr_sf_entry_t *)((char *)sf + offset);
+
+	sfe->namelen = args->namelen;
+	INT_SET(sfe->valuelen, ARCH_CONVERT, args->valuelen);
+	sfe->flags = (args->flags & ATTR_SECURE) ? XFS_ATTR_SECURE :
+			((args->flags & ATTR_ROOT) ? XFS_ATTR_ROOT : 0);
+	memcpy(sfe->nameval, args->name, args->namelen);
+	memcpy(&sfe->nameval[args->namelen], args->value, args->valuelen);
+	INT_MOD(sf->hdr.count, ARCH_CONVERT, 1);
+	INT_MOD(sf->hdr.totsize, ARCH_CONVERT, size);
+	xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_ADATA);
+
+	return(0);
+}
+
+/*
+ * Remove a name from the shortform attribute list structure.
+ */
+int
+xfs_attr_shortform_remove(xfs_da_args_t *args)
+{
+	xfs_attr_shortform_t *sf;
+	xfs_attr_sf_entry_t *sfe;
+	int base, size=0, end, totsize, i;
+	xfs_inode_t *dp;
+
+	/*
+	 * Remove the attribute.
+	 */
+	dp = args->dp;
+	base = sizeof(xfs_attr_sf_hdr_t);
+	sf = (xfs_attr_shortform_t *)dp->i_afp->if_u1.if_data;
+	sfe = &sf->list[0];
+	for (i = 0; i < INT_GET(sf->hdr.count, ARCH_CONVERT);
+				sfe = XFS_ATTR_SF_NEXTENTRY(sfe),
+					base += size, i++) {
+		size = XFS_ATTR_SF_ENTSIZE(sfe);
+		if (sfe->namelen != args->namelen)
+			continue;
+		if (memcmp(sfe->nameval, args->name, args->namelen) != 0)
+			continue;
+		if (((args->flags & ATTR_SECURE) != 0) !=
+		    ((sfe->flags & XFS_ATTR_SECURE) != 0))
+			continue;
+		if (((args->flags & ATTR_ROOT) != 0) !=
+		    ((sfe->flags & XFS_ATTR_ROOT) != 0))
+			continue;
+		break;
+	}
+	if (i == INT_GET(sf->hdr.count, ARCH_CONVERT))
+		return(XFS_ERROR(ENOATTR));
+
+	end = base + size;
+	totsize = INT_GET(sf->hdr.totsize, ARCH_CONVERT);
+	if (end != totsize) {
+		memmove(&((char *)sf)[base], &((char *)sf)[end],
+							totsize - end);
+	}
+	INT_MOD(sf->hdr.count, ARCH_CONVERT, -1);
+	INT_MOD(sf->hdr.totsize, ARCH_CONVERT, -size);
+	xfs_idata_realloc(dp, -size, XFS_ATTR_FORK);
+	xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_ADATA);
+
+	return(0);
+}
+
+/*
+ * Look up a name in a shortform attribute list structure.
+ */
+/*ARGSUSED*/
+int
+xfs_attr_shortform_lookup(xfs_da_args_t *args)
+{
+	xfs_attr_shortform_t *sf;
+	xfs_attr_sf_entry_t *sfe;
+	int i;
+	xfs_ifork_t *ifp;
+
+	ifp = args->dp->i_afp;
+	ASSERT(ifp->if_flags & XFS_IFINLINE);
+	sf = (xfs_attr_shortform_t *)ifp->if_u1.if_data;
+	sfe = &sf->list[0];
+	for (i = 0; i < INT_GET(sf->hdr.count, ARCH_CONVERT);
+				sfe = XFS_ATTR_SF_NEXTENTRY(sfe), i++) {
+		if (sfe->namelen != args->namelen)
+			continue;
+		if (memcmp(args->name, sfe->nameval, args->namelen) != 0)
+			continue;
+		if (((args->flags & ATTR_SECURE) != 0) !=
+		    ((sfe->flags & XFS_ATTR_SECURE) != 0))
+			continue;
+		if (((args->flags & ATTR_ROOT) != 0) !=
+		    ((sfe->flags & XFS_ATTR_ROOT) != 0))
+			continue;
+		return(XFS_ERROR(EEXIST));
+	}
+	return(XFS_ERROR(ENOATTR));
+}
+
+/*
+ * Look up a name in a shortform attribute list structure.
+ */
+/*ARGSUSED*/
+int
+xfs_attr_shortform_getvalue(xfs_da_args_t *args)
+{
+	xfs_attr_shortform_t *sf;
+	xfs_attr_sf_entry_t *sfe;
+	int i;
+
+	ASSERT(args->dp->i_d.di_aformat == XFS_IFINLINE);
+	sf = (xfs_attr_shortform_t *)args->dp->i_afp->if_u1.if_data;
+	sfe = &sf->list[0];
+	for (i = 0; i < INT_GET(sf->hdr.count, ARCH_CONVERT);
+				sfe = XFS_ATTR_SF_NEXTENTRY(sfe), i++) {
+		if (sfe->namelen != args->namelen)
+			continue;
+		if (memcmp(args->name, sfe->nameval, args->namelen) != 0)
+			continue;
+		if (((args->flags & ATTR_SECURE) != 0) !=
+		    ((sfe->flags & XFS_ATTR_SECURE) != 0))
+			continue;
+		if (((args->flags & ATTR_ROOT) != 0) !=
+		    ((sfe->flags & XFS_ATTR_ROOT) != 0))
+			continue;
+		if (args->flags & ATTR_KERNOVAL) {
+			args->valuelen = INT_GET(sfe->valuelen, ARCH_CONVERT);
+			return(XFS_ERROR(EEXIST));
+		}
+		if (args->valuelen < INT_GET(sfe->valuelen, ARCH_CONVERT)) {
+			args->valuelen = INT_GET(sfe->valuelen, ARCH_CONVERT);
+			return(XFS_ERROR(ERANGE));
+		}
+		args->valuelen = INT_GET(sfe->valuelen, ARCH_CONVERT);
+		memcpy(args->value, &sfe->nameval[args->namelen],
+						    args->valuelen);
+		return(XFS_ERROR(EEXIST));
+	}
+	return(XFS_ERROR(ENOATTR));
+}
+
+/*
+ * Convert from using the shortform to the leaf.
+ */
+int
+xfs_attr_shortform_to_leaf(xfs_da_args_t *args)
+{
+	xfs_inode_t *dp;
+	xfs_attr_shortform_t *sf;
+	xfs_attr_sf_entry_t *sfe;
+	xfs_da_args_t nargs;
+	char *tmpbuffer;
+	int error, i, size;
+	xfs_dablk_t blkno;
+	xfs_dabuf_t *bp;
+	xfs_ifork_t *ifp;
+
+	dp = args->dp;
+	ifp = dp->i_afp;
+	sf = (xfs_attr_shortform_t *)ifp->if_u1.if_data;
+	size = INT_GET(sf->hdr.totsize, ARCH_CONVERT);
+	tmpbuffer = kmem_alloc(size, KM_SLEEP);
+	ASSERT(tmpbuffer != NULL);
+	memcpy(tmpbuffer, ifp->if_u1.if_data, size);
+	sf = (xfs_attr_shortform_t *)tmpbuffer;
+
+	xfs_idata_realloc(dp, -size, XFS_ATTR_FORK);
+	bp = NULL;
+	error = xfs_da_grow_inode(args, &blkno);
+	if (error) {
+		/*
+		 * If we hit an IO error middle of the transaction inside
+		 * grow_inode(), we may have inconsistent data. Bail out.
+		 */
+		if (error == EIO)
+			goto out;
+		xfs_idata_realloc(dp, size, XFS_ATTR_FORK);	/* try to put */
+		memcpy(ifp->if_u1.if_data, tmpbuffer, size);	/* it back */
+		goto out;
+	}
+
+	ASSERT(blkno == 0);
+	error = xfs_attr_leaf_create(args, blkno, &bp);
+	if (error) {
+		error = xfs_da_shrink_inode(args, 0, bp);
+		bp = NULL;
+		if (error)
+			goto out;
+		xfs_idata_realloc(dp, size, XFS_ATTR_FORK);	/* try to put */
+		memcpy(ifp->if_u1.if_data, tmpbuffer, size);	/* it back */
+		goto out;
+	}
+
+	memset((char *)&nargs, 0, sizeof(nargs));
+	nargs.dp = dp;
+	nargs.firstblock = args->firstblock;
+	nargs.flist = args->flist;
+	nargs.total = args->total;
+	nargs.whichfork = XFS_ATTR_FORK;
+	nargs.trans = args->trans;
+	nargs.oknoent = 1;
+
+	sfe = &sf->list[0];
+	for (i = 0; i < INT_GET(sf->hdr.count, ARCH_CONVERT); i++) {
+		nargs.name = (char *)sfe->nameval;
+		nargs.namelen = sfe->namelen;
+		nargs.value = (char *)&sfe->nameval[nargs.namelen];
+		nargs.valuelen = INT_GET(sfe->valuelen, ARCH_CONVERT);
+		nargs.hashval = xfs_da_hashname((char *)sfe->nameval,
+						sfe->namelen);
+		nargs.flags = (sfe->flags & XFS_ATTR_SECURE) ? ATTR_SECURE :
+				((sfe->flags & XFS_ATTR_ROOT) ? ATTR_ROOT : 0);
+		error = xfs_attr_leaf_lookup_int(bp, &nargs); /* set a->index */
+		ASSERT(error == ENOATTR);
+		error = xfs_attr_leaf_add(bp, &nargs);
+		ASSERT(error != ENOSPC);
+		if (error)
+			goto out;
+		sfe = XFS_ATTR_SF_NEXTENTRY(sfe);
+	}
+	error = 0;
+
+out:
+	if(bp)
+		xfs_da_buf_done(bp);
+	kmem_free(tmpbuffer, size);
+	return(error);
+}
+
+STATIC int
+xfs_attr_shortform_compare(const void *a, const void *b)
+{
+	xfs_attr_sf_sort_t *sa, *sb;
+
+	sa = (xfs_attr_sf_sort_t *)a;
+	sb = (xfs_attr_sf_sort_t *)b;
+	if (INT_GET(sa->hash, ARCH_CONVERT)
+				< INT_GET(sb->hash, ARCH_CONVERT)) {
+		return(-1);
+	} else if (INT_GET(sa->hash, ARCH_CONVERT)
+				> INT_GET(sb->hash, ARCH_CONVERT)) {
+		return(1);
+	} else {
+		return(sa->entno - sb->entno);
+	}
+}
+
+/*
+ * Copy out entries of shortform attribute lists for attr_list().
+ * Shortform atrtribute lists are not stored in hashval sorted order.
+ * If the output buffer is not large enough to hold them all, then we
+ * we have to calculate each entries' hashvalue and sort them before
+ * we can begin returning them to the user.
+ */
+/*ARGSUSED*/
+int
+xfs_attr_shortform_list(xfs_attr_list_context_t *context)
+{
+	attrlist_cursor_kern_t *cursor;
+	xfs_attr_sf_sort_t *sbuf, *sbp;
+	xfs_attr_shortform_t *sf;
+	xfs_attr_sf_entry_t *sfe;
+	xfs_inode_t *dp;
+	int sbsize, nsbuf, count, i;
+
+	ASSERT(context != NULL);
+	dp = context->dp;
+	ASSERT(dp != NULL);
+	ASSERT(dp->i_afp != NULL);
+	sf = (xfs_attr_shortform_t *)dp->i_afp->if_u1.if_data;
+	ASSERT(sf != NULL);
+	if (!sf->hdr.count)
+		return(0);
+	cursor = context->cursor;
+	ASSERT(cursor != NULL);
+
+	xfs_attr_trace_l_c("sf start", context);
+
+	/*
+	 * If the buffer is large enough, do not bother with sorting.
+	 * Note the generous fudge factor of 16 overhead bytes per entry.
+	 */
+	if ((dp->i_afp->if_bytes + INT_GET(sf->hdr.count, ARCH_CONVERT) * 16)
+							< context->bufsize) {
+		for (i = 0, sfe = &sf->list[0];
+				i < INT_GET(sf->hdr.count, ARCH_CONVERT); i++) {
+			attrnames_t	*namesp;
+
+			if (((context->flags & ATTR_SECURE) != 0) !=
+			    ((sfe->flags & XFS_ATTR_SECURE) != 0) &&
+			    !(context->flags & ATTR_KERNORMALS)) {
+				sfe = XFS_ATTR_SF_NEXTENTRY(sfe);
+				continue;
+			}
+			if (((context->flags & ATTR_ROOT) != 0) !=
+			    ((sfe->flags & XFS_ATTR_ROOT) != 0) &&
+			    !(context->flags & ATTR_KERNROOTLS)) {
+				sfe = XFS_ATTR_SF_NEXTENTRY(sfe);
+				continue;
+			}
+			namesp = (sfe->flags & XFS_ATTR_SECURE) ? &attr_secure:
+				((sfe->flags & XFS_ATTR_ROOT) ? &attr_trusted :
+				  &attr_user);
+			if (context->flags & ATTR_KERNOVAL) {
+				ASSERT(context->flags & ATTR_KERNAMELS);
+				context->count += namesp->attr_namelen +
+					INT_GET(sfe->namelen, ARCH_CONVERT) + 1;
+			}
+			else {
+				if (xfs_attr_put_listent(context, namesp,
+						   (char *)sfe->nameval,
+						   (int)sfe->namelen,
+						   (int)INT_GET(sfe->valuelen,
+								ARCH_CONVERT)))
+					break;
+			}
+			sfe = XFS_ATTR_SF_NEXTENTRY(sfe);
+		}
+		xfs_attr_trace_l_c("sf big-gulp", context);
+		return(0);
+	}
+
+	/*
+	 * It didn't all fit, so we have to sort everything on hashval.
+	 */
+	sbsize = INT_GET(sf->hdr.count, ARCH_CONVERT) * sizeof(*sbuf);
+	sbp = sbuf = kmem_alloc(sbsize, KM_SLEEP);
+
+	/*
+	 * Scan the attribute list for the rest of the entries, storing
+	 * the relevant info from only those that match into a buffer.
+	 */
+	nsbuf = 0;
+	for (i = 0, sfe = &sf->list[0];
+			i < INT_GET(sf->hdr.count, ARCH_CONVERT); i++) {
+		if (unlikely(
+		    ((char *)sfe < (char *)sf) ||
+		    ((char *)sfe >= ((char *)sf + dp->i_afp->if_bytes)))) {
+			XFS_CORRUPTION_ERROR("xfs_attr_shortform_list",
+					     XFS_ERRLEVEL_LOW,
+					     context->dp->i_mount, sfe);
+			xfs_attr_trace_l_c("sf corrupted", context);
+			kmem_free(sbuf, sbsize);
+			return XFS_ERROR(EFSCORRUPTED);
+		}
+		if (((context->flags & ATTR_SECURE) != 0) !=
+		    ((sfe->flags & XFS_ATTR_SECURE) != 0) &&
+		    !(context->flags & ATTR_KERNORMALS)) {
+			sfe = XFS_ATTR_SF_NEXTENTRY(sfe);
+			continue;
+		}
+		if (((context->flags & ATTR_ROOT) != 0) !=
+		    ((sfe->flags & XFS_ATTR_ROOT) != 0) &&
+		    !(context->flags & ATTR_KERNROOTLS)) {
+			sfe = XFS_ATTR_SF_NEXTENTRY(sfe);
+			continue;
+		}
+		sbp->entno = i;
+		INT_SET(sbp->hash, ARCH_CONVERT,
+			xfs_da_hashname((char *)sfe->nameval, sfe->namelen));
+		sbp->name = (char *)sfe->nameval;
+		sbp->namelen = sfe->namelen;
+		/* These are bytes, and both on-disk, don't endian-flip */
+		sbp->valuelen = sfe->valuelen;
+		sbp->flags = sfe->flags;
+		sfe = XFS_ATTR_SF_NEXTENTRY(sfe);
+		sbp++;
+		nsbuf++;
+	}
+
+	/*
+	 * Sort the entries on hash then entno.
+	 */
+	qsort(sbuf, nsbuf, sizeof(*sbuf), xfs_attr_shortform_compare);
+
+	/*
+	 * Re-find our place IN THE SORTED LIST.
+	 */
+	count = 0;
+	cursor->initted = 1;
+	cursor->blkno = 0;
+	for (sbp = sbuf, i = 0; i < nsbuf; i++, sbp++) {
+		if (INT_GET(sbp->hash, ARCH_CONVERT) == cursor->hashval) {
+			if (cursor->offset == count) {
+				break;
+			}
+			count++;
+		} else if (INT_GET(sbp->hash, ARCH_CONVERT) > cursor->hashval) {
+			break;
+		}
+	}
+	if (i == nsbuf) {
+		kmem_free(sbuf, sbsize);
+		xfs_attr_trace_l_c("blk end", context);
+		return(0);
+	}
+
+	/*
+	 * Loop putting entries into the user buffer.
+	 */
+	for ( ; i < nsbuf; i++, sbp++) {
+		attrnames_t	*namesp;
+
+		namesp = (sbp->flags & XFS_ATTR_SECURE) ? &attr_secure :
+			((sbp->flags & XFS_ATTR_ROOT) ? &attr_trusted :
+			  &attr_user);
+
+		if (cursor->hashval != INT_GET(sbp->hash, ARCH_CONVERT)) {
+			cursor->hashval = INT_GET(sbp->hash, ARCH_CONVERT);
+			cursor->offset = 0;
+		}
+		if (context->flags & ATTR_KERNOVAL) {
+			ASSERT(context->flags & ATTR_KERNAMELS);
+			context->count += namesp->attr_namelen +
+						sbp->namelen + 1;
+		} else {
+			if (xfs_attr_put_listent(context, namesp,
+					sbp->name, sbp->namelen,
+					INT_GET(sbp->valuelen, ARCH_CONVERT)))
+				break;
+		}
+		cursor->offset++;
+	}
+
+	kmem_free(sbuf, sbsize);
+	xfs_attr_trace_l_c("sf E-O-F", context);
+	return(0);
+}
+
+/*
+ * Check a leaf attribute block to see if all the entries would fit into
+ * a shortform attribute list.
+ */
+int
+xfs_attr_shortform_allfit(xfs_dabuf_t *bp, xfs_inode_t *dp)
+{
+	xfs_attr_leafblock_t *leaf;
+	xfs_attr_leaf_entry_t *entry;
+	xfs_attr_leaf_name_local_t *name_loc;
+	int bytes, i;
+
+	leaf = bp->data;
+	ASSERT(INT_GET(leaf->hdr.info.magic, ARCH_CONVERT)
+						== XFS_ATTR_LEAF_MAGIC);
+
+	entry = &leaf->entries[0];
+	bytes = sizeof(struct xfs_attr_sf_hdr);
+	for (i = 0; i < INT_GET(leaf->hdr.count, ARCH_CONVERT); entry++, i++) {
+		if (entry->flags & XFS_ATTR_INCOMPLETE)
+			continue;		/* don't copy partial entries */
+		if (!(entry->flags & XFS_ATTR_LOCAL))
+			return(0);
+		name_loc = XFS_ATTR_LEAF_NAME_LOCAL(leaf, i);
+		if (name_loc->namelen >= XFS_ATTR_SF_ENTSIZE_MAX)
+			return(0);
+		if (INT_GET(name_loc->valuelen, ARCH_CONVERT) >= XFS_ATTR_SF_ENTSIZE_MAX)
+			return(0);
+		bytes += sizeof(struct xfs_attr_sf_entry)-1
+				+ name_loc->namelen
+				+ INT_GET(name_loc->valuelen, ARCH_CONVERT);
+	}
+	return( bytes < XFS_IFORK_ASIZE(dp) );
+}
+
+/*
+ * Convert a leaf attribute list to shortform attribute list
+ */
+int
+xfs_attr_leaf_to_shortform(xfs_dabuf_t *bp, xfs_da_args_t *args)
+{
+	xfs_attr_leafblock_t *leaf;
+	xfs_attr_leaf_entry_t *entry;
+	xfs_attr_leaf_name_local_t *name_loc;
+	xfs_da_args_t nargs;
+	xfs_inode_t *dp;
+	char *tmpbuffer;
+	int error, i;
+
+	dp = args->dp;
+	tmpbuffer = kmem_alloc(XFS_LBSIZE(dp->i_mount), KM_SLEEP);
+	ASSERT(tmpbuffer != NULL);
+
+	ASSERT(bp != NULL);
+	memcpy(tmpbuffer, bp->data, XFS_LBSIZE(dp->i_mount));
+	leaf = (xfs_attr_leafblock_t *)tmpbuffer;
+	ASSERT(INT_GET(leaf->hdr.info.magic, ARCH_CONVERT)
+						== XFS_ATTR_LEAF_MAGIC);
+	memset(bp->data, 0, XFS_LBSIZE(dp->i_mount));
+
+	/*
+	 * Clean out the prior contents of the attribute list.
+	 */
+	error = xfs_da_shrink_inode(args, 0, bp);
+	if (error)
+		goto out;
+	error = xfs_attr_shortform_create(args);
+	if (error)
+		goto out;
+
+	/*
+	 * Copy the attributes
+	 */
+	memset((char *)&nargs, 0, sizeof(nargs));
+	nargs.dp = dp;
+	nargs.firstblock = args->firstblock;
+	nargs.flist = args->flist;
+	nargs.total = args->total;
+	nargs.whichfork = XFS_ATTR_FORK;
+	nargs.trans = args->trans;
+	nargs.oknoent = 1;
+	entry = &leaf->entries[0];
+	for (i = 0; i < INT_GET(leaf->hdr.count, ARCH_CONVERT); entry++, i++) {
+		if (entry->flags & XFS_ATTR_INCOMPLETE)
+			continue;	/* don't copy partial entries */
+		if (!entry->nameidx)
+			continue;
+		ASSERT(entry->flags & XFS_ATTR_LOCAL);
+		name_loc = XFS_ATTR_LEAF_NAME_LOCAL(leaf, i);
+		nargs.name = (char *)name_loc->nameval;
+		nargs.namelen = name_loc->namelen;
+		nargs.value = (char *)&name_loc->nameval[nargs.namelen];
+		nargs.valuelen = INT_GET(name_loc->valuelen, ARCH_CONVERT);
+		nargs.hashval = INT_GET(entry->hashval, ARCH_CONVERT);
+		nargs.flags = (entry->flags & XFS_ATTR_SECURE) ? ATTR_SECURE :
+			      ((entry->flags & XFS_ATTR_ROOT) ? ATTR_ROOT : 0);
+		xfs_attr_shortform_add(&nargs);
+	}
+	error = 0;
+
+out:
+	kmem_free(tmpbuffer, XFS_LBSIZE(dp->i_mount));
+	return(error);
+}
+
+/*
+ * Convert from using a single leaf to a root node and a leaf.
+ */
+int
+xfs_attr_leaf_to_node(xfs_da_args_t *args)
+{
+	xfs_attr_leafblock_t *leaf;
+	xfs_da_intnode_t *node;
+	xfs_inode_t *dp;
+	xfs_dabuf_t *bp1, *bp2;
+	xfs_dablk_t blkno;
+	int error;
+
+	dp = args->dp;
+	bp1 = bp2 = NULL;
+	error = xfs_da_grow_inode(args, &blkno);
+	if (error)
+		goto out;
+	error = xfs_da_read_buf(args->trans, args->dp, 0, -1, &bp1,
+					     XFS_ATTR_FORK);
+	if (error)
+		goto out;
+	ASSERT(bp1 != NULL);
+	bp2 = NULL;
+	error = xfs_da_get_buf(args->trans, args->dp, blkno, -1, &bp2,
+					    XFS_ATTR_FORK);
+	if (error)
+		goto out;
+	ASSERT(bp2 != NULL);
+	memcpy(bp2->data, bp1->data, XFS_LBSIZE(dp->i_mount));
+	xfs_da_buf_done(bp1);
+	bp1 = NULL;
+	xfs_da_log_buf(args->trans, bp2, 0, XFS_LBSIZE(dp->i_mount) - 1);
+
+	/*
+	 * Set up the new root node.
+	 */
+	error = xfs_da_node_create(args, 0, 1, &bp1, XFS_ATTR_FORK);
+	if (error)
+		goto out;
+	node = bp1->data;
+	leaf = bp2->data;
+	ASSERT(INT_GET(leaf->hdr.info.magic, ARCH_CONVERT)
+						== XFS_ATTR_LEAF_MAGIC);
+	/* both on-disk, don't endian-flip twice */
+	node->btree[0].hashval =
+		leaf->entries[INT_GET(leaf->hdr.count, ARCH_CONVERT)-1 ].hashval;
+	INT_SET(node->btree[0].before, ARCH_CONVERT, blkno);
+	INT_SET(node->hdr.count, ARCH_CONVERT, 1);
+	xfs_da_log_buf(args->trans, bp1, 0, XFS_LBSIZE(dp->i_mount) - 1);
+	error = 0;
+out:
+	if (bp1)
+		xfs_da_buf_done(bp1);
+	if (bp2)
+		xfs_da_buf_done(bp2);
+	return(error);
+}
+
+
+/*========================================================================
+ * Routines used for growing the Btree.
+ *========================================================================*/
+
+/*
+ * Create the initial contents of a leaf attribute list
+ * or a leaf in a node attribute list.
+ */
+int
+xfs_attr_leaf_create(xfs_da_args_t *args, xfs_dablk_t blkno, xfs_dabuf_t **bpp)
+{
+	xfs_attr_leafblock_t *leaf;
+	xfs_attr_leaf_hdr_t *hdr;
+	xfs_inode_t *dp;
+	xfs_dabuf_t *bp;
+	int error;
+
+	dp = args->dp;
+	ASSERT(dp != NULL);
+	error = xfs_da_get_buf(args->trans, args->dp, blkno, -1, &bp,
+					    XFS_ATTR_FORK);
+	if (error)
+		return(error);
+	ASSERT(bp != NULL);
+	leaf = bp->data;
+	memset((char *)leaf, 0, XFS_LBSIZE(dp->i_mount));
+	hdr = &leaf->hdr;
+	INT_SET(hdr->info.magic, ARCH_CONVERT, XFS_ATTR_LEAF_MAGIC);
+	INT_SET(hdr->firstused, ARCH_CONVERT, XFS_LBSIZE(dp->i_mount));
+	if (!hdr->firstused) {
+		INT_SET(hdr->firstused, ARCH_CONVERT,
+			XFS_LBSIZE(dp->i_mount) - XFS_ATTR_LEAF_NAME_ALIGN);
+	}
+
+	INT_SET(hdr->freemap[0].base, ARCH_CONVERT,
+						sizeof(xfs_attr_leaf_hdr_t));
+	INT_SET(hdr->freemap[0].size, ARCH_CONVERT,
+					  INT_GET(hdr->firstused, ARCH_CONVERT)
+					- INT_GET(hdr->freemap[0].base,
+								ARCH_CONVERT));
+
+	xfs_da_log_buf(args->trans, bp, 0, XFS_LBSIZE(dp->i_mount) - 1);
+
+	*bpp = bp;
+	return(0);
+}
+
+/*
+ * Split the leaf node, rebalance, then add the new entry.
+ */
+int
+xfs_attr_leaf_split(xfs_da_state_t *state, xfs_da_state_blk_t *oldblk,
+				   xfs_da_state_blk_t *newblk)
+{
+	xfs_dablk_t blkno;
+	int error;
+
+	/*
+	 * Allocate space for a new leaf node.
+	 */
+	ASSERT(oldblk->magic == XFS_ATTR_LEAF_MAGIC);
+	error = xfs_da_grow_inode(state->args, &blkno);
+	if (error)
+		return(error);
+	error = xfs_attr_leaf_create(state->args, blkno, &newblk->bp);
+	if (error)
+		return(error);
+	newblk->blkno = blkno;
+	newblk->magic = XFS_ATTR_LEAF_MAGIC;
+
+	/*
+	 * Rebalance the entries across the two leaves.
+	 * NOTE: rebalance() currently depends on the 2nd block being empty.
+	 */
+	xfs_attr_leaf_rebalance(state, oldblk, newblk);
+	error = xfs_da_blk_link(state, oldblk, newblk);
+	if (error)
+		return(error);
+
+	/*
+	 * Save info on "old" attribute for "atomic rename" ops, leaf_add()
+	 * modifies the index/blkno/rmtblk/rmtblkcnt fields to show the
+	 * "new" attrs info.  Will need the "old" info to remove it later.
+	 *
+	 * Insert the "new" entry in the correct block.
+	 */
+	if (state->inleaf)
+		error = xfs_attr_leaf_add(oldblk->bp, state->args);
+	else
+		error = xfs_attr_leaf_add(newblk->bp, state->args);
+
+	/*
+	 * Update last hashval in each block since we added the name.
+	 */
+	oldblk->hashval = xfs_attr_leaf_lasthash(oldblk->bp, NULL);
+	newblk->hashval = xfs_attr_leaf_lasthash(newblk->bp, NULL);
+	return(error);
+}
+
+/*
+ * Add a name to the leaf attribute list structure.
+ */
+int
+xfs_attr_leaf_add(xfs_dabuf_t *bp, xfs_da_args_t *args)
+{
+	xfs_attr_leafblock_t *leaf;
+	xfs_attr_leaf_hdr_t *hdr;
+	xfs_attr_leaf_map_t *map;
+	int tablesize, entsize, sum, tmp, i;
+
+	leaf = bp->data;
+	ASSERT(INT_GET(leaf->hdr.info.magic, ARCH_CONVERT)
+						== XFS_ATTR_LEAF_MAGIC);
+	ASSERT((args->index >= 0)
+		&& (args->index <= INT_GET(leaf->hdr.count, ARCH_CONVERT)));
+	hdr = &leaf->hdr;
+	entsize = xfs_attr_leaf_newentsize(args,
+			   args->trans->t_mountp->m_sb.sb_blocksize, NULL);
+
+	/*
+	 * Search through freemap for first-fit on new name length.
+	 * (may need to figure in size of entry struct too)
+	 */
+	tablesize = (INT_GET(hdr->count, ARCH_CONVERT) + 1)
+					* sizeof(xfs_attr_leaf_entry_t)
+					+ sizeof(xfs_attr_leaf_hdr_t);
+	map = &hdr->freemap[XFS_ATTR_LEAF_MAPSIZE-1];
+	for (sum = 0, i = XFS_ATTR_LEAF_MAPSIZE-1; i >= 0; map--, i--) {
+		if (tablesize > INT_GET(hdr->firstused, ARCH_CONVERT)) {
+			sum += INT_GET(map->size, ARCH_CONVERT);
+			continue;
+		}
+		if (!map->size)
+			continue;	/* no space in this map */
+		tmp = entsize;
+		if (INT_GET(map->base, ARCH_CONVERT)
+				< INT_GET(hdr->firstused, ARCH_CONVERT))
+			tmp += sizeof(xfs_attr_leaf_entry_t);
+		if (INT_GET(map->size, ARCH_CONVERT) >= tmp) {
+			tmp = xfs_attr_leaf_add_work(bp, args, i);
+			return(tmp);
+		}
+		sum += INT_GET(map->size, ARCH_CONVERT);
+	}
+
+	/*
+	 * If there are no holes in the address space of the block,
+	 * and we don't have enough freespace, then compaction will do us
+	 * no good and we should just give up.
+	 */
+	if (!hdr->holes && (sum < entsize))
+		return(XFS_ERROR(ENOSPC));
+
+	/*
+	 * Compact the entries to coalesce free space.
+	 * This may change the hdr->count via dropping INCOMPLETE entries.
+	 */
+	xfs_attr_leaf_compact(args->trans, bp);
+
+	/*
+	 * After compaction, the block is guaranteed to have only one
+	 * free region, in freemap[0].  If it is not big enough, give up.
+	 */
+	if (INT_GET(hdr->freemap[0].size, ARCH_CONVERT)
+				< (entsize + sizeof(xfs_attr_leaf_entry_t)))
+		return(XFS_ERROR(ENOSPC));
+
+	return(xfs_attr_leaf_add_work(bp, args, 0));
+}
+
+/*
+ * Add a name to a leaf attribute list structure.
+ */
+STATIC int
+xfs_attr_leaf_add_work(xfs_dabuf_t *bp, xfs_da_args_t *args, int mapindex)
+{
+	xfs_attr_leafblock_t *leaf;
+	xfs_attr_leaf_hdr_t *hdr;
+	xfs_attr_leaf_entry_t *entry;
+	xfs_attr_leaf_name_local_t *name_loc;
+	xfs_attr_leaf_name_remote_t *name_rmt;
+	xfs_attr_leaf_map_t *map;
+	xfs_mount_t *mp;
+	int tmp, i;
+
+	leaf = bp->data;
+	ASSERT(INT_GET(leaf->hdr.info.magic, ARCH_CONVERT)
+						== XFS_ATTR_LEAF_MAGIC);
+	hdr = &leaf->hdr;
+	ASSERT((mapindex >= 0) && (mapindex < XFS_ATTR_LEAF_MAPSIZE));
+	ASSERT((args->index >= 0)
+		&& (args->index <= INT_GET(hdr->count, ARCH_CONVERT)));
+
+	/*
+	 * Force open some space in the entry array and fill it in.
+	 */
+	entry = &leaf->entries[args->index];
+	if (args->index < INT_GET(hdr->count, ARCH_CONVERT)) {
+		tmp  = INT_GET(hdr->count, ARCH_CONVERT) - args->index;
+		tmp *= sizeof(xfs_attr_leaf_entry_t);
+		memmove((char *)(entry+1), (char *)entry, tmp);
+		xfs_da_log_buf(args->trans, bp,
+		    XFS_DA_LOGRANGE(leaf, entry, tmp + sizeof(*entry)));
+	}
+	INT_MOD(hdr->count, ARCH_CONVERT, 1);
+
+	/*
+	 * Allocate space for the new string (at the end of the run).
+	 */
+	map = &hdr->freemap[mapindex];
+	mp = args->trans->t_mountp;
+	ASSERT(INT_GET(map->base, ARCH_CONVERT) < XFS_LBSIZE(mp));
+	ASSERT((INT_GET(map->base, ARCH_CONVERT) & 0x3) == 0);
+	ASSERT(INT_GET(map->size, ARCH_CONVERT)
+				>= xfs_attr_leaf_newentsize(args,
+					     mp->m_sb.sb_blocksize, NULL));
+	ASSERT(INT_GET(map->size, ARCH_CONVERT) < XFS_LBSIZE(mp));
+	ASSERT((INT_GET(map->size, ARCH_CONVERT) & 0x3) == 0);
+	INT_MOD(map->size, ARCH_CONVERT,
+		-xfs_attr_leaf_newentsize(args, mp->m_sb.sb_blocksize, &tmp));
+	INT_SET(entry->nameidx, ARCH_CONVERT,
+					INT_GET(map->base, ARCH_CONVERT)
+				      + INT_GET(map->size, ARCH_CONVERT));
+	INT_SET(entry->hashval, ARCH_CONVERT, args->hashval);
+	entry->flags = tmp ? XFS_ATTR_LOCAL : 0;
+	entry->flags |= (args->flags & ATTR_SECURE) ? XFS_ATTR_SECURE :
+			((args->flags & ATTR_ROOT) ? XFS_ATTR_ROOT : 0);
+	if (args->rename) {
+		entry->flags |= XFS_ATTR_INCOMPLETE;
+		if ((args->blkno2 == args->blkno) &&
+		    (args->index2 <= args->index)) {
+			args->index2++;
+		}
+	}
+	xfs_da_log_buf(args->trans, bp,
+			  XFS_DA_LOGRANGE(leaf, entry, sizeof(*entry)));
+	ASSERT((args->index == 0) || (INT_GET(entry->hashval, ARCH_CONVERT)
+						>= INT_GET((entry-1)->hashval,
+							    ARCH_CONVERT)));
+	ASSERT((args->index == INT_GET(hdr->count, ARCH_CONVERT)-1) ||
+	       (INT_GET(entry->hashval, ARCH_CONVERT)
+			    <= (INT_GET((entry+1)->hashval, ARCH_CONVERT))));
+
+	/*
+	 * Copy the attribute name and value into the new space.
+	 *
+	 * For "remote" attribute values, simply note that we need to
+	 * allocate space for the "remote" value.  We can't actually
+	 * allocate the extents in this transaction, and we can't decide
+	 * which blocks they should be as we might allocate more blocks
+	 * as part of this transaction (a split operation for example).
+	 */
+	if (entry->flags & XFS_ATTR_LOCAL) {
+		name_loc = XFS_ATTR_LEAF_NAME_LOCAL(leaf, args->index);
+		name_loc->namelen = args->namelen;
+		INT_SET(name_loc->valuelen, ARCH_CONVERT, args->valuelen);
+		memcpy((char *)name_loc->nameval, args->name, args->namelen);
+		memcpy((char *)&name_loc->nameval[args->namelen], args->value,
+				   INT_GET(name_loc->valuelen, ARCH_CONVERT));
+	} else {
+		name_rmt = XFS_ATTR_LEAF_NAME_REMOTE(leaf, args->index);
+		name_rmt->namelen = args->namelen;
+		memcpy((char *)name_rmt->name, args->name, args->namelen);
+		entry->flags |= XFS_ATTR_INCOMPLETE;
+		/* just in case */
+		name_rmt->valuelen = 0;
+		name_rmt->valueblk = 0;
+		args->rmtblkno = 1;
+		args->rmtblkcnt = XFS_B_TO_FSB(mp, args->valuelen);
+	}
+	xfs_da_log_buf(args->trans, bp,
+	     XFS_DA_LOGRANGE(leaf, XFS_ATTR_LEAF_NAME(leaf, args->index),
+				   xfs_attr_leaf_entsize(leaf, args->index)));
+
+	/*
+	 * Update the control info for this leaf node
+	 */
+	if (INT_GET(entry->nameidx, ARCH_CONVERT)
+				< INT_GET(hdr->firstused, ARCH_CONVERT)) {
+		/* both on-disk, don't endian-flip twice */
+		hdr->firstused = entry->nameidx;
+	}
+	ASSERT(INT_GET(hdr->firstused, ARCH_CONVERT)
+				>= ((INT_GET(hdr->count, ARCH_CONVERT)
+					* sizeof(*entry))+sizeof(*hdr)));
+	tmp = (INT_GET(hdr->count, ARCH_CONVERT)-1)
+					* sizeof(xfs_attr_leaf_entry_t)
+					+ sizeof(xfs_attr_leaf_hdr_t);
+	map = &hdr->freemap[0];
+	for (i = 0; i < XFS_ATTR_LEAF_MAPSIZE; map++, i++) {
+		if (INT_GET(map->base, ARCH_CONVERT) == tmp) {
+			INT_MOD(map->base, ARCH_CONVERT,
+					sizeof(xfs_attr_leaf_entry_t));
+			INT_MOD(map->size, ARCH_CONVERT,
+					-sizeof(xfs_attr_leaf_entry_t));
+		}
+	}
+	INT_MOD(hdr->usedbytes, ARCH_CONVERT,
+				xfs_attr_leaf_entsize(leaf, args->index));
+	xfs_da_log_buf(args->trans, bp,
+		XFS_DA_LOGRANGE(leaf, hdr, sizeof(*hdr)));
+	return(0);
+}
+
+/*
+ * Garbage collect a leaf attribute list block by copying it to a new buffer.
+ */
+STATIC void
+xfs_attr_leaf_compact(xfs_trans_t *trans, xfs_dabuf_t *bp)
+{
+	xfs_attr_leafblock_t *leaf_s, *leaf_d;
+	xfs_attr_leaf_hdr_t *hdr_s, *hdr_d;
+	xfs_mount_t *mp;
+	char *tmpbuffer;
+
+	mp = trans->t_mountp;
+	tmpbuffer = kmem_alloc(XFS_LBSIZE(mp), KM_SLEEP);
+	ASSERT(tmpbuffer != NULL);
+	memcpy(tmpbuffer, bp->data, XFS_LBSIZE(mp));
+	memset(bp->data, 0, XFS_LBSIZE(mp));
+
+	/*
+	 * Copy basic information
+	 */
+	leaf_s = (xfs_attr_leafblock_t *)tmpbuffer;
+	leaf_d = bp->data;
+	hdr_s = &leaf_s->hdr;
+	hdr_d = &leaf_d->hdr;
+	hdr_d->info = hdr_s->info;	/* struct copy */
+	INT_SET(hdr_d->firstused, ARCH_CONVERT, XFS_LBSIZE(mp));
+	/* handle truncation gracefully */
+	if (!hdr_d->firstused) {
+		INT_SET(hdr_d->firstused, ARCH_CONVERT,
+				XFS_LBSIZE(mp) - XFS_ATTR_LEAF_NAME_ALIGN);
+	}
+	hdr_d->usedbytes = 0;
+	hdr_d->count = 0;
+	hdr_d->holes = 0;
+	INT_SET(hdr_d->freemap[0].base, ARCH_CONVERT,
+					sizeof(xfs_attr_leaf_hdr_t));
+	INT_SET(hdr_d->freemap[0].size, ARCH_CONVERT,
+				INT_GET(hdr_d->firstused, ARCH_CONVERT)
+			      - INT_GET(hdr_d->freemap[0].base, ARCH_CONVERT));
+
+	/*
+	 * Copy all entry's in the same (sorted) order,
+	 * but allocate name/value pairs packed and in sequence.
+	 */
+	xfs_attr_leaf_moveents(leaf_s, 0, leaf_d, 0,
+				(int)INT_GET(hdr_s->count, ARCH_CONVERT), mp);
+
+	xfs_da_log_buf(trans, bp, 0, XFS_LBSIZE(mp) - 1);
+
+	kmem_free(tmpbuffer, XFS_LBSIZE(mp));
+}
+
+/*
+ * Redistribute the attribute list entries between two leaf nodes,
+ * taking into account the size of the new entry.
+ *
+ * NOTE: if new block is empty, then it will get the upper half of the
+ * old block.  At present, all (one) callers pass in an empty second block.
+ *
+ * This code adjusts the args->index/blkno and args->index2/blkno2 fields
+ * to match what it is doing in splitting the attribute leaf block.  Those
+ * values are used in "atomic rename" operations on attributes.  Note that
+ * the "new" and "old" values can end up in different blocks.
+ */
+STATIC void
+xfs_attr_leaf_rebalance(xfs_da_state_t *state, xfs_da_state_blk_t *blk1,
+				       xfs_da_state_blk_t *blk2)
+{
+	xfs_da_args_t *args;
+	xfs_da_state_blk_t *tmp_blk;
+	xfs_attr_leafblock_t *leaf1, *leaf2;
+	xfs_attr_leaf_hdr_t *hdr1, *hdr2;
+	int count, totallen, max, space, swap;
+
+	/*
+	 * Set up environment.
+	 */
+	ASSERT(blk1->magic == XFS_ATTR_LEAF_MAGIC);
+	ASSERT(blk2->magic == XFS_ATTR_LEAF_MAGIC);
+	leaf1 = blk1->bp->data;
+	leaf2 = blk2->bp->data;
+	ASSERT(INT_GET(leaf1->hdr.info.magic, ARCH_CONVERT)
+						== XFS_ATTR_LEAF_MAGIC);
+	ASSERT(INT_GET(leaf2->hdr.info.magic, ARCH_CONVERT)
+						== XFS_ATTR_LEAF_MAGIC);
+	args = state->args;
+
+	/*
+	 * Check ordering of blocks, reverse if it makes things simpler.
+	 *
+	 * NOTE: Given that all (current) callers pass in an empty
+	 * second block, this code should never set "swap".
+	 */
+	swap = 0;
+	if (xfs_attr_leaf_order(blk1->bp, blk2->bp)) {
+		tmp_blk = blk1;
+		blk1 = blk2;
+		blk2 = tmp_blk;
+		leaf1 = blk1->bp->data;
+		leaf2 = blk2->bp->data;
+		swap = 1;
+	}
+	hdr1 = &leaf1->hdr;
+	hdr2 = &leaf2->hdr;
+
+	/*
+	 * Examine entries until we reduce the absolute difference in
+	 * byte usage between the two blocks to a minimum.  Then get
+	 * the direction to copy and the number of elements to move.
+	 *
+	 * "inleaf" is true if the new entry should be inserted into blk1.
+	 * If "swap" is also true, then reverse the sense of "inleaf".
+	 */
+	state->inleaf = xfs_attr_leaf_figure_balance(state, blk1, blk2,
+							    &count, &totallen);
+	if (swap)
+		state->inleaf = !state->inleaf;
+
+	/*
+	 * Move any entries required from leaf to leaf:
+	 */
+	if (count < INT_GET(hdr1->count, ARCH_CONVERT)) {
+		/*
+		 * Figure the total bytes to be added to the destination leaf.
+		 */
+		/* number entries being moved */
+		count = INT_GET(hdr1->count, ARCH_CONVERT) - count;
+		space  = INT_GET(hdr1->usedbytes, ARCH_CONVERT) - totallen;
+		space += count * sizeof(xfs_attr_leaf_entry_t);
+
+		/*
+		 * leaf2 is the destination, compact it if it looks tight.
+		 */
+		max  = INT_GET(hdr2->firstused, ARCH_CONVERT)
+						- sizeof(xfs_attr_leaf_hdr_t);
+		max -= INT_GET(hdr2->count, ARCH_CONVERT)
+					* sizeof(xfs_attr_leaf_entry_t);
+		if (space > max) {
+			xfs_attr_leaf_compact(args->trans, blk2->bp);
+		}
+
+		/*
+		 * Move high entries from leaf1 to low end of leaf2.
+		 */
+		xfs_attr_leaf_moveents(leaf1,
+				INT_GET(hdr1->count, ARCH_CONVERT)-count,
+				leaf2, 0, count, state->mp);
+
+		xfs_da_log_buf(args->trans, blk1->bp, 0, state->blocksize-1);
+		xfs_da_log_buf(args->trans, blk2->bp, 0, state->blocksize-1);
+	} else if (count > INT_GET(hdr1->count, ARCH_CONVERT)) {
+		/*
+		 * I assert that since all callers pass in an empty
+		 * second buffer, this code should never execute.
+		 */
+
+		/*
+		 * Figure the total bytes to be added to the destination leaf.
+		 */
+		/* number entries being moved */
+		count -= INT_GET(hdr1->count, ARCH_CONVERT);
+		space  = totallen - INT_GET(hdr1->usedbytes, ARCH_CONVERT);
+		space += count * sizeof(xfs_attr_leaf_entry_t);
+
+		/*
+		 * leaf1 is the destination, compact it if it looks tight.
+		 */
+		max  = INT_GET(hdr1->firstused, ARCH_CONVERT)
+						- sizeof(xfs_attr_leaf_hdr_t);
+		max -= INT_GET(hdr1->count, ARCH_CONVERT)
+					* sizeof(xfs_attr_leaf_entry_t);
+		if (space > max) {
+			xfs_attr_leaf_compact(args->trans, blk1->bp);
+		}
+
+		/*
+		 * Move low entries from leaf2 to high end of leaf1.
+		 */
+		xfs_attr_leaf_moveents(leaf2, 0, leaf1,
+				(int)INT_GET(hdr1->count, ARCH_CONVERT), count,
+				state->mp);
+
+		xfs_da_log_buf(args->trans, blk1->bp, 0, state->blocksize-1);
+		xfs_da_log_buf(args->trans, blk2->bp, 0, state->blocksize-1);
+	}
+
+	/*
+	 * Copy out last hashval in each block for B-tree code.
+	 */
+	blk1->hashval =
+	    INT_GET(leaf1->entries[INT_GET(leaf1->hdr.count,
+				    ARCH_CONVERT)-1].hashval, ARCH_CONVERT);
+	blk2->hashval =
+	    INT_GET(leaf2->entries[INT_GET(leaf2->hdr.count,
+				    ARCH_CONVERT)-1].hashval, ARCH_CONVERT);
+
+	/*
+	 * Adjust the expected index for insertion.
+	 * NOTE: this code depends on the (current) situation that the
+	 * second block was originally empty.
+	 *
+	 * If the insertion point moved to the 2nd block, we must adjust
+	 * the index.  We must also track the entry just following the
+	 * new entry for use in an "atomic rename" operation, that entry
+	 * is always the "old" entry and the "new" entry is what we are
+	 * inserting.  The index/blkno fields refer to the "old" entry,
+	 * while the index2/blkno2 fields refer to the "new" entry.
+	 */
+	if (blk1->index > INT_GET(leaf1->hdr.count, ARCH_CONVERT)) {
+		ASSERT(state->inleaf == 0);
+		blk2->index = blk1->index
+				- INT_GET(leaf1->hdr.count, ARCH_CONVERT);
+		args->index = args->index2 = blk2->index;
+		args->blkno = args->blkno2 = blk2->blkno;
+	} else if (blk1->index == INT_GET(leaf1->hdr.count, ARCH_CONVERT)) {
+		if (state->inleaf) {
+			args->index = blk1->index;
+			args->blkno = blk1->blkno;
+			args->index2 = 0;
+			args->blkno2 = blk2->blkno;
+		} else {
+			blk2->index = blk1->index
+				    - INT_GET(leaf1->hdr.count, ARCH_CONVERT);
+			args->index = args->index2 = blk2->index;
+			args->blkno = args->blkno2 = blk2->blkno;
+		}
+	} else {
+		ASSERT(state->inleaf == 1);
+		args->index = args->index2 = blk1->index;
+		args->blkno = args->blkno2 = blk1->blkno;
+	}
+}
+
+/*
+ * Examine entries until we reduce the absolute difference in
+ * byte usage between the two blocks to a minimum.
+ * GROT: Is this really necessary?  With other than a 512 byte blocksize,
+ * GROT: there will always be enough room in either block for a new entry.
+ * GROT: Do a double-split for this case?
+ */
+STATIC int
+xfs_attr_leaf_figure_balance(xfs_da_state_t *state,
+				    xfs_da_state_blk_t *blk1,
+				    xfs_da_state_blk_t *blk2,
+				    int *countarg, int *usedbytesarg)
+{
+	xfs_attr_leafblock_t *leaf1, *leaf2;
+	xfs_attr_leaf_hdr_t *hdr1, *hdr2;
+	xfs_attr_leaf_entry_t *entry;
+	int count, max, index, totallen, half;
+	int lastdelta, foundit, tmp;
+
+	/*
+	 * Set up environment.
+	 */
+	leaf1 = blk1->bp->data;
+	leaf2 = blk2->bp->data;
+	hdr1 = &leaf1->hdr;
+	hdr2 = &leaf2->hdr;
+	foundit = 0;
+	totallen = 0;
+
+	/*
+	 * Examine entries until we reduce the absolute difference in
+	 * byte usage between the two blocks to a minimum.
+	 */
+	max = INT_GET(hdr1->count, ARCH_CONVERT)
+			+ INT_GET(hdr2->count, ARCH_CONVERT);
+	half  = (max+1) * sizeof(*entry);
+	half += INT_GET(hdr1->usedbytes, ARCH_CONVERT)
+				+ INT_GET(hdr2->usedbytes, ARCH_CONVERT)
+				+ xfs_attr_leaf_newentsize(state->args,
+						     state->blocksize, NULL);
+	half /= 2;
+	lastdelta = state->blocksize;
+	entry = &leaf1->entries[0];
+	for (count = index = 0; count < max; entry++, index++, count++) {
+
+#define XFS_ATTR_ABS(A)	(((A) < 0) ? -(A) : (A))
+		/*
+		 * The new entry is in the first block, account for it.
+		 */
+		if (count == blk1->index) {
+			tmp = totallen + sizeof(*entry) +
+				xfs_attr_leaf_newentsize(state->args,
+							 state->blocksize,
+							 NULL);
+			if (XFS_ATTR_ABS(half - tmp) > lastdelta)
+				break;
+			lastdelta = XFS_ATTR_ABS(half - tmp);
+			totallen = tmp;
+			foundit = 1;
+		}
+
+		/*
+		 * Wrap around into the second block if necessary.
+		 */
+		if (count == INT_GET(hdr1->count, ARCH_CONVERT)) {
+			leaf1 = leaf2;
+			entry = &leaf1->entries[0];
+			index = 0;
+		}
+
+		/*
+		 * Figure out if next leaf entry would be too much.
+		 */
+		tmp = totallen + sizeof(*entry) + xfs_attr_leaf_entsize(leaf1,
+									index);
+		if (XFS_ATTR_ABS(half - tmp) > lastdelta)
+			break;
+		lastdelta = XFS_ATTR_ABS(half - tmp);
+		totallen = tmp;
+#undef XFS_ATTR_ABS
+	}
+
+	/*
+	 * Calculate the number of usedbytes that will end up in lower block.
+	 * If new entry not in lower block, fix up the count.
+	 */
+	totallen -= count * sizeof(*entry);
+	if (foundit) {
+		totallen -= sizeof(*entry) +
+				xfs_attr_leaf_newentsize(state->args,
+							 state->blocksize,
+							 NULL);
+	}
+
+	*countarg = count;
+	*usedbytesarg = totallen;
+	return(foundit);
+}
+
+/*========================================================================
+ * Routines used for shrinking the Btree.
+ *========================================================================*/
+
+/*
+ * Check a leaf block and its neighbors to see if the block should be
+ * collapsed into one or the other neighbor.  Always keep the block
+ * with the smaller block number.
+ * If the current block is over 50% full, don't try to join it, return 0.
+ * If the block is empty, fill in the state structure and return 2.
+ * If it can be collapsed, fill in the state structure and return 1.
+ * If nothing can be done, return 0.
+ *
+ * GROT: allow for INCOMPLETE entries in calculation.
+ */
+int
+xfs_attr_leaf_toosmall(xfs_da_state_t *state, int *action)
+{
+	xfs_attr_leafblock_t *leaf;
+	xfs_da_state_blk_t *blk;
+	xfs_da_blkinfo_t *info;
+	int count, bytes, forward, error, retval, i;
+	xfs_dablk_t blkno;
+	xfs_dabuf_t *bp;
+
+	/*
+	 * Check for the degenerate case of the block being over 50% full.
+	 * If so, it's not worth even looking to see if we might be able
+	 * to coalesce with a sibling.
+	 */
+	blk = &state->path.blk[ state->path.active-1 ];
+	info = blk->bp->data;
+	ASSERT(INT_GET(info->magic, ARCH_CONVERT) == XFS_ATTR_LEAF_MAGIC);
+	leaf = (xfs_attr_leafblock_t *)info;
+	count = INT_GET(leaf->hdr.count, ARCH_CONVERT);
+	bytes = sizeof(xfs_attr_leaf_hdr_t) +
+		count * sizeof(xfs_attr_leaf_entry_t) +
+		INT_GET(leaf->hdr.usedbytes, ARCH_CONVERT);
+	if (bytes > (state->blocksize >> 1)) {
+		*action = 0;	/* blk over 50%, don't try to join */
+		return(0);
+	}
+
+	/*
+	 * Check for the degenerate case of the block being empty.
+	 * If the block is empty, we'll simply delete it, no need to
+	 * coalesce it with a sibling block.  We choose (aribtrarily)
+	 * to merge with the forward block unless it is NULL.
+	 */
+	if (count == 0) {
+		/*
+		 * Make altpath point to the block we want to keep and
+		 * path point to the block we want to drop (this one).
+		 */
+		forward = info->forw;
+		memcpy(&state->altpath, &state->path, sizeof(state->path));
+		error = xfs_da_path_shift(state, &state->altpath, forward,
+						 0, &retval);
+		if (error)
+			return(error);
+		if (retval) {
+			*action = 0;
+		} else {
+			*action = 2;
+		}
+		return(0);
+	}
+
+	/*
+	 * Examine each sibling block to see if we can coalesce with
+	 * at least 25% free space to spare.  We need to figure out
+	 * whether to merge with the forward or the backward block.
+	 * We prefer coalescing with the lower numbered sibling so as
+	 * to shrink an attribute list over time.
+	 */
+	/* start with smaller blk num */
+	forward = (INT_GET(info->forw, ARCH_CONVERT)
+					< INT_GET(info->back, ARCH_CONVERT));
+	for (i = 0; i < 2; forward = !forward, i++) {
+		if (forward)
+			blkno = INT_GET(info->forw, ARCH_CONVERT);
+		else
+			blkno = INT_GET(info->back, ARCH_CONVERT);
+		if (blkno == 0)
+			continue;
+		error = xfs_da_read_buf(state->args->trans, state->args->dp,
+					blkno, -1, &bp, XFS_ATTR_FORK);
+		if (error)
+			return(error);
+		ASSERT(bp != NULL);
+
+		leaf = (xfs_attr_leafblock_t *)info;
+		count  = INT_GET(leaf->hdr.count, ARCH_CONVERT);
+		bytes  = state->blocksize - (state->blocksize>>2);
+		bytes -= INT_GET(leaf->hdr.usedbytes, ARCH_CONVERT);
+		leaf = bp->data;
+		ASSERT(INT_GET(leaf->hdr.info.magic, ARCH_CONVERT)
+						== XFS_ATTR_LEAF_MAGIC);
+		count += INT_GET(leaf->hdr.count, ARCH_CONVERT);
+		bytes -= INT_GET(leaf->hdr.usedbytes, ARCH_CONVERT);
+		bytes -= count * sizeof(xfs_attr_leaf_entry_t);
+		bytes -= sizeof(xfs_attr_leaf_hdr_t);
+		xfs_da_brelse(state->args->trans, bp);
+		if (bytes >= 0)
+			break;	/* fits with at least 25% to spare */
+	}
+	if (i >= 2) {
+		*action = 0;
+		return(0);
+	}
+
+	/*
+	 * Make altpath point to the block we want to keep (the lower
+	 * numbered block) and path point to the block we want to drop.
+	 */
+	memcpy(&state->altpath, &state->path, sizeof(state->path));
+	if (blkno < blk->blkno) {
+		error = xfs_da_path_shift(state, &state->altpath, forward,
+						 0, &retval);
+	} else {
+		error = xfs_da_path_shift(state, &state->path, forward,
+						 0, &retval);
+	}
+	if (error)
+		return(error);
+	if (retval) {
+		*action = 0;
+	} else {
+		*action = 1;
+	}
+	return(0);
+}
+
+/*
+ * Remove a name from the leaf attribute list structure.
+ *
+ * Return 1 if leaf is less than 37% full, 0 if >= 37% full.
+ * If two leaves are 37% full, when combined they will leave 25% free.
+ */
+int
+xfs_attr_leaf_remove(xfs_dabuf_t *bp, xfs_da_args_t *args)
+{
+	xfs_attr_leafblock_t *leaf;
+	xfs_attr_leaf_hdr_t *hdr;
+	xfs_attr_leaf_map_t *map;
+	xfs_attr_leaf_entry_t *entry;
+	int before, after, smallest, entsize;
+	int tablesize, tmp, i;
+	xfs_mount_t *mp;
+
+	leaf = bp->data;
+	ASSERT(INT_GET(leaf->hdr.info.magic, ARCH_CONVERT)
+						== XFS_ATTR_LEAF_MAGIC);
+	hdr = &leaf->hdr;
+	mp = args->trans->t_mountp;
+	ASSERT((INT_GET(hdr->count, ARCH_CONVERT) > 0)
+		&& (INT_GET(hdr->count, ARCH_CONVERT) < (XFS_LBSIZE(mp)/8)));
+	ASSERT((args->index >= 0)
+		&& (args->index < INT_GET(hdr->count, ARCH_CONVERT)));
+	ASSERT(INT_GET(hdr->firstused, ARCH_CONVERT)
+				>= ((INT_GET(hdr->count, ARCH_CONVERT)
+					* sizeof(*entry))+sizeof(*hdr)));
+	entry = &leaf->entries[args->index];
+	ASSERT(INT_GET(entry->nameidx, ARCH_CONVERT)
+				>= INT_GET(hdr->firstused, ARCH_CONVERT));
+	ASSERT(INT_GET(entry->nameidx, ARCH_CONVERT) < XFS_LBSIZE(mp));
+
+	/*
+	 * Scan through free region table:
+	 *    check for adjacency of free'd entry with an existing one,
+	 *    find smallest free region in case we need to replace it,
+	 *    adjust any map that borders the entry table,
+	 */
+	tablesize = INT_GET(hdr->count, ARCH_CONVERT)
+					* sizeof(xfs_attr_leaf_entry_t)
+					+ sizeof(xfs_attr_leaf_hdr_t);
+	map = &hdr->freemap[0];
+	tmp = INT_GET(map->size, ARCH_CONVERT);
+	before = after = -1;
+	smallest = XFS_ATTR_LEAF_MAPSIZE - 1;
+	entsize = xfs_attr_leaf_entsize(leaf, args->index);
+	for (i = 0; i < XFS_ATTR_LEAF_MAPSIZE; map++, i++) {
+		ASSERT(INT_GET(map->base, ARCH_CONVERT) < XFS_LBSIZE(mp));
+		ASSERT(INT_GET(map->size, ARCH_CONVERT) < XFS_LBSIZE(mp));
+		if (INT_GET(map->base, ARCH_CONVERT) == tablesize) {
+			INT_MOD(map->base, ARCH_CONVERT,
+					-sizeof(xfs_attr_leaf_entry_t));
+			INT_MOD(map->size, ARCH_CONVERT,
+					sizeof(xfs_attr_leaf_entry_t));
+		}
+
+		if ((INT_GET(map->base, ARCH_CONVERT)
+					+ INT_GET(map->size, ARCH_CONVERT))
+				== INT_GET(entry->nameidx, ARCH_CONVERT)) {
+			before = i;
+		} else if (INT_GET(map->base, ARCH_CONVERT)
+			== (INT_GET(entry->nameidx, ARCH_CONVERT) + entsize)) {
+			after = i;
+		} else if (INT_GET(map->size, ARCH_CONVERT) < tmp) {
+			tmp = INT_GET(map->size, ARCH_CONVERT);
+			smallest = i;
+		}
+	}
+
+	/*
+	 * Coalesce adjacent freemap regions,
+	 * or replace the smallest region.
+	 */
+	if ((before >= 0) || (after >= 0)) {
+		if ((before >= 0) && (after >= 0)) {
+			map = &hdr->freemap[before];
+			INT_MOD(map->size, ARCH_CONVERT, entsize);
+			INT_MOD(map->size, ARCH_CONVERT,
+				INT_GET(hdr->freemap[after].size,
+							ARCH_CONVERT));
+			hdr->freemap[after].base = 0;
+			hdr->freemap[after].size = 0;
+		} else if (before >= 0) {
+			map = &hdr->freemap[before];
+			INT_MOD(map->size, ARCH_CONVERT, entsize);
+		} else {
+			map = &hdr->freemap[after];
+			/* both on-disk, don't endian flip twice */
+			map->base = entry->nameidx;
+			INT_MOD(map->size, ARCH_CONVERT, entsize);
+		}
+	} else {
+		/*
+		 * Replace smallest region (if it is smaller than free'd entry)
+		 */
+		map = &hdr->freemap[smallest];
+		if (INT_GET(map->size, ARCH_CONVERT) < entsize) {
+			INT_SET(map->base, ARCH_CONVERT,
+					INT_GET(entry->nameidx, ARCH_CONVERT));
+			INT_SET(map->size, ARCH_CONVERT, entsize);
+		}
+	}
+
+	/*
+	 * Did we remove the first entry?
+	 */
+	if (INT_GET(entry->nameidx, ARCH_CONVERT)
+				== INT_GET(hdr->firstused, ARCH_CONVERT))
+		smallest = 1;
+	else
+		smallest = 0;
+
+	/*
+	 * Compress the remaining entries and zero out the removed stuff.
+	 */
+	memset(XFS_ATTR_LEAF_NAME(leaf, args->index), 0, entsize);
+	INT_MOD(hdr->usedbytes, ARCH_CONVERT, -entsize);
+	xfs_da_log_buf(args->trans, bp,
+	     XFS_DA_LOGRANGE(leaf, XFS_ATTR_LEAF_NAME(leaf, args->index),
+				   entsize));
+
+	tmp = (INT_GET(hdr->count, ARCH_CONVERT) - args->index)
+					* sizeof(xfs_attr_leaf_entry_t);
+	memmove((char *)entry, (char *)(entry+1), tmp);
+	INT_MOD(hdr->count, ARCH_CONVERT, -1);
+	xfs_da_log_buf(args->trans, bp,
+	    XFS_DA_LOGRANGE(leaf, entry, tmp + sizeof(*entry)));
+	entry = &leaf->entries[INT_GET(hdr->count, ARCH_CONVERT)];
+	memset((char *)entry, 0, sizeof(xfs_attr_leaf_entry_t));
+
+	/*
+	 * If we removed the first entry, re-find the first used byte
+	 * in the name area.  Note that if the entry was the "firstused",
+	 * then we don't have a "hole" in our block resulting from
+	 * removing the name.
+	 */
+	if (smallest) {
+		tmp = XFS_LBSIZE(mp);
+		entry = &leaf->entries[0];
+		for (i = INT_GET(hdr->count, ARCH_CONVERT)-1;
+						i >= 0; entry++, i--) {
+			ASSERT(INT_GET(entry->nameidx, ARCH_CONVERT)
+				>= INT_GET(hdr->firstused, ARCH_CONVERT));
+			ASSERT(INT_GET(entry->nameidx, ARCH_CONVERT)
+							< XFS_LBSIZE(mp));
+			if (INT_GET(entry->nameidx, ARCH_CONVERT) < tmp)
+				tmp = INT_GET(entry->nameidx, ARCH_CONVERT);
+		}
+		INT_SET(hdr->firstused, ARCH_CONVERT, tmp);
+		if (!hdr->firstused) {
+			INT_SET(hdr->firstused, ARCH_CONVERT,
+					tmp - XFS_ATTR_LEAF_NAME_ALIGN);
+		}
+	} else {
+		hdr->holes = 1;		/* mark as needing compaction */
+	}
+	xfs_da_log_buf(args->trans, bp,
+			  XFS_DA_LOGRANGE(leaf, hdr, sizeof(*hdr)));
+
+	/*
+	 * Check if leaf is less than 50% full, caller may want to
+	 * "join" the leaf with a sibling if so.
+	 */
+	tmp  = sizeof(xfs_attr_leaf_hdr_t);
+	tmp += INT_GET(leaf->hdr.count, ARCH_CONVERT)
+					* sizeof(xfs_attr_leaf_entry_t);
+	tmp += INT_GET(leaf->hdr.usedbytes, ARCH_CONVERT);
+	return(tmp < mp->m_attr_magicpct); /* leaf is < 37% full */
+}
+
+/*
+ * Move all the attribute list entries from drop_leaf into save_leaf.
+ */
+void
+xfs_attr_leaf_unbalance(xfs_da_state_t *state, xfs_da_state_blk_t *drop_blk,
+				       xfs_da_state_blk_t *save_blk)
+{
+	xfs_attr_leafblock_t *drop_leaf, *save_leaf, *tmp_leaf;
+	xfs_attr_leaf_hdr_t *drop_hdr, *save_hdr, *tmp_hdr;
+	xfs_mount_t *mp;
+	char *tmpbuffer;
+
+	/*
+	 * Set up environment.
+	 */
+	mp = state->mp;
+	ASSERT(drop_blk->magic == XFS_ATTR_LEAF_MAGIC);
+	ASSERT(save_blk->magic == XFS_ATTR_LEAF_MAGIC);
+	drop_leaf = drop_blk->bp->data;
+	save_leaf = save_blk->bp->data;
+	ASSERT(INT_GET(drop_leaf->hdr.info.magic, ARCH_CONVERT)
+						== XFS_ATTR_LEAF_MAGIC);
+	ASSERT(INT_GET(save_leaf->hdr.info.magic, ARCH_CONVERT)
+						== XFS_ATTR_LEAF_MAGIC);
+	drop_hdr = &drop_leaf->hdr;
+	save_hdr = &save_leaf->hdr;
+
+	/*
+	 * Save last hashval from dying block for later Btree fixup.
+	 */
+	drop_blk->hashval =
+		INT_GET(drop_leaf->entries[INT_GET(drop_leaf->hdr.count,
+						ARCH_CONVERT)-1].hashval,
+								ARCH_CONVERT);
+
+	/*
+	 * Check if we need a temp buffer, or can we do it in place.
+	 * Note that we don't check "leaf" for holes because we will
+	 * always be dropping it, toosmall() decided that for us already.
+	 */
+	if (save_hdr->holes == 0) {
+		/*
+		 * dest leaf has no holes, so we add there.  May need
+		 * to make some room in the entry array.
+		 */
+		if (xfs_attr_leaf_order(save_blk->bp, drop_blk->bp)) {
+			xfs_attr_leaf_moveents(drop_leaf, 0, save_leaf, 0,
+			     (int)INT_GET(drop_hdr->count, ARCH_CONVERT), mp);
+		} else {
+			xfs_attr_leaf_moveents(drop_leaf, 0, save_leaf,
+				  INT_GET(save_hdr->count, ARCH_CONVERT),
+				  (int)INT_GET(drop_hdr->count, ARCH_CONVERT),
+				  mp);
+		}
+	} else {
+		/*
+		 * Destination has holes, so we make a temporary copy
+		 * of the leaf and add them both to that.
+		 */
+		tmpbuffer = kmem_alloc(state->blocksize, KM_SLEEP);
+		ASSERT(tmpbuffer != NULL);
+		memset(tmpbuffer, 0, state->blocksize);
+		tmp_leaf = (xfs_attr_leafblock_t *)tmpbuffer;
+		tmp_hdr = &tmp_leaf->hdr;
+		tmp_hdr->info = save_hdr->info;	/* struct copy */
+		tmp_hdr->count = 0;
+		INT_SET(tmp_hdr->firstused, ARCH_CONVERT, state->blocksize);
+		if (!tmp_hdr->firstused) {
+			INT_SET(tmp_hdr->firstused, ARCH_CONVERT,
+				state->blocksize - XFS_ATTR_LEAF_NAME_ALIGN);
+		}
+		tmp_hdr->usedbytes = 0;
+		if (xfs_attr_leaf_order(save_blk->bp, drop_blk->bp)) {
+			xfs_attr_leaf_moveents(drop_leaf, 0, tmp_leaf, 0,
+				(int)INT_GET(drop_hdr->count, ARCH_CONVERT),
+				mp);
+			xfs_attr_leaf_moveents(save_leaf, 0, tmp_leaf,
+				  INT_GET(tmp_leaf->hdr.count, ARCH_CONVERT),
+				 (int)INT_GET(save_hdr->count, ARCH_CONVERT),
+				 mp);
+		} else {
+			xfs_attr_leaf_moveents(save_leaf, 0, tmp_leaf, 0,
+				(int)INT_GET(save_hdr->count, ARCH_CONVERT),
+				mp);
+			xfs_attr_leaf_moveents(drop_leaf, 0, tmp_leaf,
+				INT_GET(tmp_leaf->hdr.count, ARCH_CONVERT),
+				(int)INT_GET(drop_hdr->count, ARCH_CONVERT),
+				mp);
+		}
+		memcpy((char *)save_leaf, (char *)tmp_leaf, state->blocksize);
+		kmem_free(tmpbuffer, state->blocksize);
+	}
+
+	xfs_da_log_buf(state->args->trans, save_blk->bp, 0,
+					   state->blocksize - 1);
+
+	/*
+	 * Copy out last hashval in each block for B-tree code.
+	 */
+	save_blk->hashval =
+		INT_GET(save_leaf->entries[INT_GET(save_leaf->hdr.count,
+						ARCH_CONVERT)-1].hashval,
+								ARCH_CONVERT);
+}
+
+/*========================================================================
+ * Routines used for finding things in the Btree.
+ *========================================================================*/
+
+/*
+ * Look up a name in a leaf attribute list structure.
+ * This is the internal routine, it uses the caller's buffer.
+ *
+ * Note that duplicate keys are allowed, but only check within the
+ * current leaf node.  The Btree code must check in adjacent leaf nodes.
+ *
+ * Return in args->index the index into the entry[] array of either
+ * the found entry, or where the entry should have been (insert before
+ * that entry).
+ *
+ * Don't change the args->value unless we find the attribute.
+ */
+int
+xfs_attr_leaf_lookup_int(xfs_dabuf_t *bp, xfs_da_args_t *args)
+{
+	xfs_attr_leafblock_t *leaf;
+	xfs_attr_leaf_entry_t *entry;
+	xfs_attr_leaf_name_local_t *name_loc;
+	xfs_attr_leaf_name_remote_t *name_rmt;
+	int probe, span;
+	xfs_dahash_t hashval;
+
+	leaf = bp->data;
+	ASSERT(INT_GET(leaf->hdr.info.magic, ARCH_CONVERT)
+						== XFS_ATTR_LEAF_MAGIC);
+	ASSERT(INT_GET(leaf->hdr.count, ARCH_CONVERT)
+					< (XFS_LBSIZE(args->dp->i_mount)/8));
+
+	/*
+	 * Binary search.  (note: small blocks will skip this loop)
+	 */
+	hashval = args->hashval;
+	probe = span = INT_GET(leaf->hdr.count, ARCH_CONVERT) / 2;
+	for (entry = &leaf->entries[probe]; span > 4;
+		   entry = &leaf->entries[probe]) {
+		span /= 2;
+		if (INT_GET(entry->hashval, ARCH_CONVERT) < hashval)
+			probe += span;
+		else if (INT_GET(entry->hashval, ARCH_CONVERT) > hashval)
+			probe -= span;
+		else
+			break;
+	}
+	ASSERT((probe >= 0) && 
+	       (!leaf->hdr.count
+	       || (probe < INT_GET(leaf->hdr.count, ARCH_CONVERT))));
+	ASSERT((span <= 4) || (INT_GET(entry->hashval, ARCH_CONVERT)
+							== hashval));
+
+	/*
+	 * Since we may have duplicate hashval's, find the first matching
+	 * hashval in the leaf.
+	 */
+	while ((probe > 0) && (INT_GET(entry->hashval, ARCH_CONVERT)
+							>= hashval)) {
+		entry--;
+		probe--;
+	}
+	while ((probe < INT_GET(leaf->hdr.count, ARCH_CONVERT))
+		&& (INT_GET(entry->hashval, ARCH_CONVERT) < hashval)) {
+		entry++;
+		probe++;
+	}
+	if ((probe == INT_GET(leaf->hdr.count, ARCH_CONVERT))
+		    || (INT_GET(entry->hashval, ARCH_CONVERT) != hashval)) {
+		args->index = probe;
+		return(XFS_ERROR(ENOATTR));
+	}
+
+	/*
+	 * Duplicate keys may be present, so search all of them for a match.
+	 */
+	for (  ; (probe < INT_GET(leaf->hdr.count, ARCH_CONVERT))
+			&& (INT_GET(entry->hashval, ARCH_CONVERT) == hashval);
+			entry++, probe++) {
+/*
+ * GROT: Add code to remove incomplete entries.
+ */
+		/*
+		 * If we are looking for INCOMPLETE entries, show only those.
+		 * If we are looking for complete entries, show only those.
+		 */
+		if ((args->flags & XFS_ATTR_INCOMPLETE) !=
+		    (entry->flags & XFS_ATTR_INCOMPLETE)) {
+			continue;
+		}
+		if (entry->flags & XFS_ATTR_LOCAL) {
+			name_loc = XFS_ATTR_LEAF_NAME_LOCAL(leaf, probe);
+			if (name_loc->namelen != args->namelen)
+				continue;
+			if (memcmp(args->name, (char *)name_loc->nameval,
+					     args->namelen) != 0)
+				continue;
+			if (((args->flags & ATTR_SECURE) != 0) !=
+			    ((entry->flags & XFS_ATTR_SECURE) != 0))
+				continue;
+			if (((args->flags & ATTR_ROOT) != 0) !=
+			    ((entry->flags & XFS_ATTR_ROOT) != 0))
+				continue;
+			args->index = probe;
+			return(XFS_ERROR(EEXIST));
+		} else {
+			name_rmt = XFS_ATTR_LEAF_NAME_REMOTE(leaf, probe);
+			if (name_rmt->namelen != args->namelen)
+				continue;
+			if (memcmp(args->name, (char *)name_rmt->name,
+					     args->namelen) != 0)
+				continue;
+			if (((args->flags & ATTR_SECURE) != 0) !=
+			    ((entry->flags & XFS_ATTR_SECURE) != 0))
+				continue;
+			if (((args->flags & ATTR_ROOT) != 0) !=
+			    ((entry->flags & XFS_ATTR_ROOT) != 0))
+				continue;
+			args->index = probe;
+			args->rmtblkno
+				  = INT_GET(name_rmt->valueblk, ARCH_CONVERT);
+			args->rmtblkcnt = XFS_B_TO_FSB(args->dp->i_mount,
+						   INT_GET(name_rmt->valuelen,
+								ARCH_CONVERT));
+			return(XFS_ERROR(EEXIST));
+		}
+	}
+	args->index = probe;
+	return(XFS_ERROR(ENOATTR));
+}
+
+/*
+ * Get the value associated with an attribute name from a leaf attribute
+ * list structure.
+ */
+int
+xfs_attr_leaf_getvalue(xfs_dabuf_t *bp, xfs_da_args_t *args)
+{
+	int valuelen;
+	xfs_attr_leafblock_t *leaf;
+	xfs_attr_leaf_entry_t *entry;
+	xfs_attr_leaf_name_local_t *name_loc;
+	xfs_attr_leaf_name_remote_t *name_rmt;
+
+	leaf = bp->data;
+	ASSERT(INT_GET(leaf->hdr.info.magic, ARCH_CONVERT)
+						== XFS_ATTR_LEAF_MAGIC);
+	ASSERT(INT_GET(leaf->hdr.count, ARCH_CONVERT)
+					< (XFS_LBSIZE(args->dp->i_mount)/8));
+	ASSERT(args->index < ((int)INT_GET(leaf->hdr.count, ARCH_CONVERT)));
+
+	entry = &leaf->entries[args->index];
+	if (entry->flags & XFS_ATTR_LOCAL) {
+		name_loc = XFS_ATTR_LEAF_NAME_LOCAL(leaf, args->index);
+		ASSERT(name_loc->namelen == args->namelen);
+		ASSERT(memcmp(args->name, name_loc->nameval, args->namelen) == 0);
+		valuelen = INT_GET(name_loc->valuelen, ARCH_CONVERT);
+		if (args->flags & ATTR_KERNOVAL) {
+			args->valuelen = valuelen;
+			return(0);
+		}
+		if (args->valuelen < valuelen) {
+			args->valuelen = valuelen;
+			return(XFS_ERROR(ERANGE));
+		}
+		args->valuelen = valuelen;
+		memcpy(args->value, &name_loc->nameval[args->namelen], valuelen);
+	} else {
+		name_rmt = XFS_ATTR_LEAF_NAME_REMOTE(leaf, args->index);
+		ASSERT(name_rmt->namelen == args->namelen);
+		ASSERT(memcmp(args->name, name_rmt->name, args->namelen) == 0);
+		valuelen = INT_GET(name_rmt->valuelen, ARCH_CONVERT);
+		args->rmtblkno = INT_GET(name_rmt->valueblk, ARCH_CONVERT);
+		args->rmtblkcnt = XFS_B_TO_FSB(args->dp->i_mount, valuelen);
+		if (args->flags & ATTR_KERNOVAL) {
+			args->valuelen = valuelen;
+			return(0);
+		}
+		if (args->valuelen < valuelen) {
+			args->valuelen = valuelen;
+			return(XFS_ERROR(ERANGE));
+		}
+		args->valuelen = valuelen;
+	}
+	return(0);
+}
+
+/*========================================================================
+ * Utility routines.
+ *========================================================================*/
+
+/*
+ * Move the indicated entries from one leaf to another.
+ * NOTE: this routine modifies both source and destination leaves.
+ */
+/*ARGSUSED*/
+STATIC void
+xfs_attr_leaf_moveents(xfs_attr_leafblock_t *leaf_s, int start_s,
+			xfs_attr_leafblock_t *leaf_d, int start_d,
+			int count, xfs_mount_t *mp)
+{
+	xfs_attr_leaf_hdr_t *hdr_s, *hdr_d;
+	xfs_attr_leaf_entry_t *entry_s, *entry_d;
+	int desti, tmp, i;
+
+	/*
+	 * Check for nothing to do.
+	 */
+	if (count == 0)
+		return;
+
+	/*
+	 * Set up environment.
+	 */
+	ASSERT(INT_GET(leaf_s->hdr.info.magic, ARCH_CONVERT)
+						== XFS_ATTR_LEAF_MAGIC);
+	ASSERT(INT_GET(leaf_d->hdr.info.magic, ARCH_CONVERT)
+						== XFS_ATTR_LEAF_MAGIC);
+	hdr_s = &leaf_s->hdr;
+	hdr_d = &leaf_d->hdr;
+	ASSERT((INT_GET(hdr_s->count, ARCH_CONVERT) > 0)
+				&& (INT_GET(hdr_s->count, ARCH_CONVERT)
+						< (XFS_LBSIZE(mp)/8)));
+	ASSERT(INT_GET(hdr_s->firstused, ARCH_CONVERT) >=
+		((INT_GET(hdr_s->count, ARCH_CONVERT)
+					* sizeof(*entry_s))+sizeof(*hdr_s)));
+	ASSERT(INT_GET(hdr_d->count, ARCH_CONVERT) < (XFS_LBSIZE(mp)/8));
+	ASSERT(INT_GET(hdr_d->firstused, ARCH_CONVERT) >=
+		((INT_GET(hdr_d->count, ARCH_CONVERT)
+					* sizeof(*entry_d))+sizeof(*hdr_d)));
+
+	ASSERT(start_s < INT_GET(hdr_s->count, ARCH_CONVERT));
+	ASSERT(start_d <= INT_GET(hdr_d->count, ARCH_CONVERT));
+	ASSERT(count <= INT_GET(hdr_s->count, ARCH_CONVERT));
+
+	/*
+	 * Move the entries in the destination leaf up to make a hole?
+	 */
+	if (start_d < INT_GET(hdr_d->count, ARCH_CONVERT)) {
+		tmp  = INT_GET(hdr_d->count, ARCH_CONVERT) - start_d;
+		tmp *= sizeof(xfs_attr_leaf_entry_t);
+		entry_s = &leaf_d->entries[start_d];
+		entry_d = &leaf_d->entries[start_d + count];
+		memmove((char *)entry_d, (char *)entry_s, tmp);
+	}
+
+	/*
+	 * Copy all entry's in the same (sorted) order,
+	 * but allocate attribute info packed and in sequence.
+	 */
+	entry_s = &leaf_s->entries[start_s];
+	entry_d = &leaf_d->entries[start_d];
+	desti = start_d;
+	for (i = 0; i < count; entry_s++, entry_d++, desti++, i++) {
+		ASSERT(INT_GET(entry_s->nameidx, ARCH_CONVERT)
+				>= INT_GET(hdr_s->firstused, ARCH_CONVERT));
+		tmp = xfs_attr_leaf_entsize(leaf_s, start_s + i);
+#ifdef GROT
+		/*
+		 * Code to drop INCOMPLETE entries.  Difficult to use as we
+		 * may also need to change the insertion index.  Code turned
+		 * off for 6.2, should be revisited later.
+		 */
+		if (entry_s->flags & XFS_ATTR_INCOMPLETE) { /* skip partials? */
+			memset(XFS_ATTR_LEAF_NAME(leaf_s, start_s + i), 0, tmp);
+			INT_MOD(hdr_s->usedbytes, ARCH_CONVERT, -tmp);
+			INT_MOD(hdr_s->count, ARCH_CONVERT, -1);
+			entry_d--;	/* to compensate for ++ in loop hdr */
+			desti--;
+			if ((start_s + i) < offset)
+				result++;	/* insertion index adjustment */
+		} else {
+#endif /* GROT */
+			INT_MOD(hdr_d->firstused, ARCH_CONVERT, -tmp);
+			/* both on-disk, don't endian flip twice */
+			entry_d->hashval = entry_s->hashval;
+			/* both on-disk, don't endian flip twice */
+			entry_d->nameidx = hdr_d->firstused;
+			entry_d->flags = entry_s->flags;
+			ASSERT(INT_GET(entry_d->nameidx, ARCH_CONVERT) + tmp
+							<= XFS_LBSIZE(mp));
+			memmove(XFS_ATTR_LEAF_NAME(leaf_d, desti),
+				XFS_ATTR_LEAF_NAME(leaf_s, start_s + i), tmp);
+			ASSERT(INT_GET(entry_s->nameidx, ARCH_CONVERT) + tmp
+							<= XFS_LBSIZE(mp));
+			memset(XFS_ATTR_LEAF_NAME(leaf_s, start_s + i), 0, tmp);
+			INT_MOD(hdr_s->usedbytes, ARCH_CONVERT, -tmp);
+			INT_MOD(hdr_d->usedbytes, ARCH_CONVERT, tmp);
+			INT_MOD(hdr_s->count, ARCH_CONVERT, -1);
+			INT_MOD(hdr_d->count, ARCH_CONVERT, 1);
+			tmp = INT_GET(hdr_d->count, ARCH_CONVERT)
+						* sizeof(xfs_attr_leaf_entry_t)
+						+ sizeof(xfs_attr_leaf_hdr_t);
+			ASSERT(INT_GET(hdr_d->firstused, ARCH_CONVERT) >= tmp);
+#ifdef GROT
+		}
+#endif /* GROT */
+	}
+
+	/*
+	 * Zero out the entries we just copied.
+	 */
+	if (start_s == INT_GET(hdr_s->count, ARCH_CONVERT)) {
+		tmp = count * sizeof(xfs_attr_leaf_entry_t);
+		entry_s = &leaf_s->entries[start_s];
+		ASSERT(((char *)entry_s + tmp) <=
+		       ((char *)leaf_s + XFS_LBSIZE(mp)));
+		memset((char *)entry_s, 0, tmp);
+	} else {
+		/*
+		 * Move the remaining entries down to fill the hole,
+		 * then zero the entries at the top.
+		 */
+		tmp  = INT_GET(hdr_s->count, ARCH_CONVERT) - count;
+		tmp *= sizeof(xfs_attr_leaf_entry_t);
+		entry_s = &leaf_s->entries[start_s + count];
+		entry_d = &leaf_s->entries[start_s];
+		memmove((char *)entry_d, (char *)entry_s, tmp);
+
+		tmp = count * sizeof(xfs_attr_leaf_entry_t);
+		entry_s = &leaf_s->entries[INT_GET(hdr_s->count,
+							ARCH_CONVERT)];
+		ASSERT(((char *)entry_s + tmp) <=
+		       ((char *)leaf_s + XFS_LBSIZE(mp)));
+		memset((char *)entry_s, 0, tmp);
+	}
+
+	/*
+	 * Fill in the freemap information
+	 */
+	INT_SET(hdr_d->freemap[0].base, ARCH_CONVERT,
+					sizeof(xfs_attr_leaf_hdr_t));
+	INT_MOD(hdr_d->freemap[0].base, ARCH_CONVERT,
+				INT_GET(hdr_d->count, ARCH_CONVERT)
+					* sizeof(xfs_attr_leaf_entry_t));
+	INT_SET(hdr_d->freemap[0].size, ARCH_CONVERT,
+				INT_GET(hdr_d->firstused, ARCH_CONVERT)
+			      - INT_GET(hdr_d->freemap[0].base, ARCH_CONVERT));
+	hdr_d->freemap[1].base = 0;
+	hdr_d->freemap[2].base = 0;
+	hdr_d->freemap[1].size = 0;
+	hdr_d->freemap[2].size = 0;
+	hdr_s->holes = 1;	/* leaf may not be compact */
+}
+
+/*
+ * Compare two leaf blocks "order".
+ * Return 0 unless leaf2 should go before leaf1.
+ */
+int
+xfs_attr_leaf_order(xfs_dabuf_t *leaf1_bp, xfs_dabuf_t *leaf2_bp)
+{
+	xfs_attr_leafblock_t *leaf1, *leaf2;
+
+	leaf1 = leaf1_bp->data;
+	leaf2 = leaf2_bp->data;
+	ASSERT((INT_GET(leaf1->hdr.info.magic, ARCH_CONVERT)
+						== XFS_ATTR_LEAF_MAGIC) &&
+	       (INT_GET(leaf2->hdr.info.magic, ARCH_CONVERT)
+						== XFS_ATTR_LEAF_MAGIC));
+	if (   (INT_GET(leaf1->hdr.count, ARCH_CONVERT) > 0)
+	    && (INT_GET(leaf2->hdr.count, ARCH_CONVERT) > 0)
+	    && (   (INT_GET(leaf2->entries[ 0 ].hashval, ARCH_CONVERT) <
+		      INT_GET(leaf1->entries[ 0 ].hashval, ARCH_CONVERT))
+		|| (INT_GET(leaf2->entries[INT_GET(leaf2->hdr.count,
+				ARCH_CONVERT)-1].hashval, ARCH_CONVERT) <
+		      INT_GET(leaf1->entries[INT_GET(leaf1->hdr.count,
+				ARCH_CONVERT)-1].hashval, ARCH_CONVERT))) ) {
+		return(1);
+	}
+	return(0);
+}
+
+/*
+ * Pick up the last hashvalue from a leaf block.
+ */
+xfs_dahash_t
+xfs_attr_leaf_lasthash(xfs_dabuf_t *bp, int *count)
+{
+	xfs_attr_leafblock_t *leaf;
+
+	leaf = bp->data;
+	ASSERT(INT_GET(leaf->hdr.info.magic, ARCH_CONVERT)
+						== XFS_ATTR_LEAF_MAGIC);
+	if (count)
+		*count = INT_GET(leaf->hdr.count, ARCH_CONVERT);
+	if (!leaf->hdr.count)
+		return(0);
+	return(INT_GET(leaf->entries[INT_GET(leaf->hdr.count,
+				ARCH_CONVERT)-1].hashval, ARCH_CONVERT));
+}
+
+/*
+ * Calculate the number of bytes used to store the indicated attribute
+ * (whether local or remote only calculate bytes in this block).
+ */
+int
+xfs_attr_leaf_entsize(xfs_attr_leafblock_t *leaf, int index)
+{
+	xfs_attr_leaf_name_local_t *name_loc;
+	xfs_attr_leaf_name_remote_t *name_rmt;
+	int size;
+
+	ASSERT(INT_GET(leaf->hdr.info.magic, ARCH_CONVERT)
+						== XFS_ATTR_LEAF_MAGIC);
+	if (leaf->entries[index].flags & XFS_ATTR_LOCAL) {
+		name_loc = XFS_ATTR_LEAF_NAME_LOCAL(leaf, index);
+		size = XFS_ATTR_LEAF_ENTSIZE_LOCAL(name_loc->namelen,
+						   INT_GET(name_loc->valuelen,
+								ARCH_CONVERT));
+	} else {
+		name_rmt = XFS_ATTR_LEAF_NAME_REMOTE(leaf, index);
+		size = XFS_ATTR_LEAF_ENTSIZE_REMOTE(name_rmt->namelen);
+	}
+	return(size);
+}
+
+/*
+ * Calculate the number of bytes that would be required to store the new
+ * attribute (whether local or remote only calculate bytes in this block).
+ * This routine decides as a side effect whether the attribute will be
+ * a "local" or a "remote" attribute.
+ */
+int
+xfs_attr_leaf_newentsize(xfs_da_args_t *args, int blocksize, int *local)
+{
+	int size;
+
+	size = XFS_ATTR_LEAF_ENTSIZE_LOCAL(args->namelen, args->valuelen);
+	if (size < XFS_ATTR_LEAF_ENTSIZE_LOCAL_MAX(blocksize)) {
+		if (local) {
+			*local = 1;
+		}
+	} else {
+		size = XFS_ATTR_LEAF_ENTSIZE_REMOTE(args->namelen);
+		if (local) {
+			*local = 0;
+		}
+	}
+	return(size);
+}
+
+/*
+ * Copy out attribute list entries for attr_list(), for leaf attribute lists.
+ */
+int
+xfs_attr_leaf_list_int(xfs_dabuf_t *bp, xfs_attr_list_context_t *context)
+{
+	attrlist_cursor_kern_t *cursor;
+	xfs_attr_leafblock_t *leaf;
+	xfs_attr_leaf_entry_t *entry;
+	xfs_attr_leaf_name_local_t *name_loc;
+	xfs_attr_leaf_name_remote_t *name_rmt;
+	int retval, i;
+
+	ASSERT(bp != NULL);
+	leaf = bp->data;
+	cursor = context->cursor;
+	cursor->initted = 1;
+
+	xfs_attr_trace_l_cl("blk start", context, leaf);
+
+	/*
+	 * Re-find our place in the leaf block if this is a new syscall.
+	 */
+	if (context->resynch) {
+		entry = &leaf->entries[0];
+		for (i = 0; i < INT_GET(leaf->hdr.count, ARCH_CONVERT);
+							entry++, i++) {
+			if (INT_GET(entry->hashval, ARCH_CONVERT)
+							== cursor->hashval) {
+				if (cursor->offset == context->dupcnt) {
+					context->dupcnt = 0;
+					break;
+				}
+				context->dupcnt++;
+			} else if (INT_GET(entry->hashval, ARCH_CONVERT)
+							> cursor->hashval) {
+				context->dupcnt = 0;
+				break;
+			}
+		}
+		if (i == INT_GET(leaf->hdr.count, ARCH_CONVERT)) {
+			xfs_attr_trace_l_c("not found", context);
+			return(0);
+		}
+	} else {
+		entry = &leaf->entries[0];
+		i = 0;
+	}
+	context->resynch = 0;
+
+	/*
+	 * We have found our place, start copying out the new attributes.
+	 */
+	retval = 0;
+	for (  ; (i < INT_GET(leaf->hdr.count, ARCH_CONVERT))
+	     && (retval == 0); entry++, i++) {
+		attrnames_t	*namesp;
+
+		if (INT_GET(entry->hashval, ARCH_CONVERT) != cursor->hashval) {
+			cursor->hashval = INT_GET(entry->hashval, ARCH_CONVERT);
+			cursor->offset = 0;
+		}
+
+		if (entry->flags & XFS_ATTR_INCOMPLETE)
+			continue;		/* skip incomplete entries */
+		if (((context->flags & ATTR_SECURE) != 0) !=
+		    ((entry->flags & XFS_ATTR_SECURE) != 0) &&
+		    !(context->flags & ATTR_KERNORMALS))
+			continue;		/* skip non-matching entries */
+		if (((context->flags & ATTR_ROOT) != 0) !=
+		    ((entry->flags & XFS_ATTR_ROOT) != 0) &&
+		    !(context->flags & ATTR_KERNROOTLS))
+			continue;		/* skip non-matching entries */
+
+		namesp = (entry->flags & XFS_ATTR_SECURE) ? &attr_secure :
+			((entry->flags & XFS_ATTR_ROOT) ? &attr_trusted :
+			  &attr_user);
+
+		if (entry->flags & XFS_ATTR_LOCAL) {
+			name_loc = XFS_ATTR_LEAF_NAME_LOCAL(leaf, i);
+			if (context->flags & ATTR_KERNOVAL) {
+				ASSERT(context->flags & ATTR_KERNAMELS);
+				context->count += namesp->attr_namelen +
+						(int)name_loc->namelen + 1;
+			} else {
+				retval = xfs_attr_put_listent(context, namesp,
+					(char *)name_loc->nameval,
+					(int)name_loc->namelen,
+					(int)INT_GET(name_loc->valuelen,
+								ARCH_CONVERT));
+			}
+		} else {
+			name_rmt = XFS_ATTR_LEAF_NAME_REMOTE(leaf, i);
+			if (context->flags & ATTR_KERNOVAL) {
+				ASSERT(context->flags & ATTR_KERNAMELS);
+				context->count += namesp->attr_namelen +
+						(int)name_rmt->namelen + 1;
+			} else {
+				retval = xfs_attr_put_listent(context, namesp,
+					(char *)name_rmt->name,
+					(int)name_rmt->namelen,
+					(int)INT_GET(name_rmt->valuelen,
+								ARCH_CONVERT));
+			}
+		}
+		if (retval == 0) {
+			cursor->offset++;
+		}
+	}
+	xfs_attr_trace_l_cl("blk end", context, leaf);
+	return(retval);
+}
+
+#define	ATTR_ENTBASESIZE		/* minimum bytes used by an attr */ \
+	(((struct attrlist_ent *) 0)->a_name - (char *) 0)
+#define	ATTR_ENTSIZE(namelen)		/* actual bytes used by an attr */ \
+	((ATTR_ENTBASESIZE + (namelen) + 1 + sizeof(u_int32_t)-1) \
+	 & ~(sizeof(u_int32_t)-1))
+
+/*
+ * Format an attribute and copy it out to the user's buffer.
+ * Take care to check values and protect against them changing later,
+ * we may be reading them directly out of a user buffer.
+ */
+/*ARGSUSED*/
+int
+xfs_attr_put_listent(xfs_attr_list_context_t *context,
+		     attrnames_t *namesp, char *name, int namelen, int valuelen)
+{
+	attrlist_ent_t *aep;
+	int arraytop;
+
+	ASSERT(!(context->flags & ATTR_KERNOVAL));
+	if (context->flags & ATTR_KERNAMELS) {
+		char *offset;
+
+		ASSERT(context->count >= 0);
+
+		arraytop = context->count + namesp->attr_namelen + namelen + 1;
+		if (arraytop > context->firstu) {
+			context->count = -1;	/* insufficient space */
+			return(1);
+		}
+		offset = (char *)context->alist + context->count;
+		strncpy(offset, namesp->attr_name, namesp->attr_namelen);
+		offset += namesp->attr_namelen;
+		strncpy(offset, name, namelen);			/* real name */
+		offset += namelen;
+		*offset = '\0';
+		context->count += namesp->attr_namelen + namelen + 1;
+		return(0);
+	}
+
+	ASSERT(context->count >= 0);
+	ASSERT(context->count < (ATTR_MAX_VALUELEN/8));
+	ASSERT(context->firstu >= sizeof(*context->alist));
+	ASSERT(context->firstu <= context->bufsize);
+
+	arraytop = sizeof(*context->alist) +
+			context->count * sizeof(context->alist->al_offset[0]);
+	context->firstu -= ATTR_ENTSIZE(namelen);
+	if (context->firstu < arraytop) {
+		xfs_attr_trace_l_c("buffer full", context);
+		context->alist->al_more = 1;
+		return(1);
+	}
+
+	aep = (attrlist_ent_t *)&(((char *)context->alist)[ context->firstu ]);
+	aep->a_valuelen = valuelen;
+	memcpy(aep->a_name, name, namelen);
+	aep->a_name[ namelen ] = 0;
+	context->alist->al_offset[ context->count++ ] = context->firstu;
+	context->alist->al_count = context->count;
+	xfs_attr_trace_l_c("add", context);
+	return(0);
+}
+
+/*========================================================================
+ * Manage the INCOMPLETE flag in a leaf entry
+ *========================================================================*/
+
+/*
+ * Clear the INCOMPLETE flag on an entry in a leaf block.
+ */
+int
+xfs_attr_leaf_clearflag(xfs_da_args_t *args)
+{
+	xfs_attr_leafblock_t *leaf;
+	xfs_attr_leaf_entry_t *entry;
+	xfs_attr_leaf_name_remote_t *name_rmt;
+	xfs_dabuf_t *bp;
+	int error;
+#ifdef DEBUG
+	xfs_attr_leaf_name_local_t *name_loc;
+	int namelen;
+	char *name;
+#endif /* DEBUG */
+
+	/*
+	 * Set up the operation.
+	 */
+	error = xfs_da_read_buf(args->trans, args->dp, args->blkno, -1, &bp,
+					     XFS_ATTR_FORK);
+	if (error) {
+		return(error);
+	}
+	ASSERT(bp != NULL);
+
+	leaf = bp->data;
+	ASSERT(INT_GET(leaf->hdr.info.magic, ARCH_CONVERT)
+						== XFS_ATTR_LEAF_MAGIC);
+	ASSERT(args->index < INT_GET(leaf->hdr.count, ARCH_CONVERT));
+	ASSERT(args->index >= 0);
+	entry = &leaf->entries[ args->index ];
+	ASSERT(entry->flags & XFS_ATTR_INCOMPLETE);
+
+#ifdef DEBUG
+	if (entry->flags & XFS_ATTR_LOCAL) {
+		name_loc = XFS_ATTR_LEAF_NAME_LOCAL(leaf, args->index);
+		namelen = name_loc->namelen;
+		name = (char *)name_loc->nameval;
+	} else {
+		name_rmt = XFS_ATTR_LEAF_NAME_REMOTE(leaf, args->index);
+		namelen = name_rmt->namelen;
+		name = (char *)name_rmt->name;
+	}
+	ASSERT(INT_GET(entry->hashval, ARCH_CONVERT) == args->hashval);
+	ASSERT(namelen == args->namelen);
+	ASSERT(memcmp(name, args->name, namelen) == 0);
+#endif /* DEBUG */
+
+	entry->flags &= ~XFS_ATTR_INCOMPLETE;
+	xfs_da_log_buf(args->trans, bp,
+			 XFS_DA_LOGRANGE(leaf, entry, sizeof(*entry)));
+
+	if (args->rmtblkno) {
+		ASSERT((entry->flags & XFS_ATTR_LOCAL) == 0);
+		name_rmt = XFS_ATTR_LEAF_NAME_REMOTE(leaf, args->index);
+		INT_SET(name_rmt->valueblk, ARCH_CONVERT, args->rmtblkno);
+		INT_SET(name_rmt->valuelen, ARCH_CONVERT, args->valuelen);
+		xfs_da_log_buf(args->trans, bp,
+			 XFS_DA_LOGRANGE(leaf, name_rmt, sizeof(*name_rmt)));
+	}
+	xfs_da_buf_done(bp);
+
+	/*
+	 * Commit the flag value change and start the next trans in series.
+	 */
+	error = xfs_attr_rolltrans(&args->trans, args->dp);
+
+	return(error);
+}
+
+/*
+ * Set the INCOMPLETE flag on an entry in a leaf block.
+ */
+int
+xfs_attr_leaf_setflag(xfs_da_args_t *args)
+{
+	xfs_attr_leafblock_t *leaf;
+	xfs_attr_leaf_entry_t *entry;
+	xfs_attr_leaf_name_remote_t *name_rmt;
+	xfs_dabuf_t *bp;
+	int error;
+
+	/*
+	 * Set up the operation.
+	 */
+	error = xfs_da_read_buf(args->trans, args->dp, args->blkno, -1, &bp,
+					     XFS_ATTR_FORK);
+	if (error) {
+		return(error);
+	}
+	ASSERT(bp != NULL);
+
+	leaf = bp->data;
+	ASSERT(INT_GET(leaf->hdr.info.magic, ARCH_CONVERT)
+						== XFS_ATTR_LEAF_MAGIC);
+	ASSERT(args->index < INT_GET(leaf->hdr.count, ARCH_CONVERT));
+	ASSERT(args->index >= 0);
+	entry = &leaf->entries[ args->index ];
+
+	ASSERT((entry->flags & XFS_ATTR_INCOMPLETE) == 0);
+	entry->flags |= XFS_ATTR_INCOMPLETE;
+	xfs_da_log_buf(args->trans, bp,
+			XFS_DA_LOGRANGE(leaf, entry, sizeof(*entry)));
+	if ((entry->flags & XFS_ATTR_LOCAL) == 0) {
+		name_rmt = XFS_ATTR_LEAF_NAME_REMOTE(leaf, args->index);
+		name_rmt->valueblk = 0;
+		name_rmt->valuelen = 0;
+		xfs_da_log_buf(args->trans, bp,
+			 XFS_DA_LOGRANGE(leaf, name_rmt, sizeof(*name_rmt)));
+	}
+	xfs_da_buf_done(bp);
+
+	/*
+	 * Commit the flag value change and start the next trans in series.
+	 */
+	error = xfs_attr_rolltrans(&args->trans, args->dp);
+
+	return(error);
+}
+
+/*
+ * In a single transaction, clear the INCOMPLETE flag on the leaf entry
+ * given by args->blkno/index and set the INCOMPLETE flag on the leaf
+ * entry given by args->blkno2/index2.
+ *
+ * Note that they could be in different blocks, or in the same block.
+ */
+int
+xfs_attr_leaf_flipflags(xfs_da_args_t *args)
+{
+	xfs_attr_leafblock_t *leaf1, *leaf2;
+	xfs_attr_leaf_entry_t *entry1, *entry2;
+	xfs_attr_leaf_name_remote_t *name_rmt;
+	xfs_dabuf_t *bp1, *bp2;
+	int error;
+#ifdef DEBUG
+	xfs_attr_leaf_name_local_t *name_loc;
+	int namelen1, namelen2;
+	char *name1, *name2;
+#endif /* DEBUG */
+
+	/*
+	 * Read the block containing the "old" attr
+	 */
+	error = xfs_da_read_buf(args->trans, args->dp, args->blkno, -1, &bp1,
+					     XFS_ATTR_FORK);
+	if (error) {
+		return(error);
+	}
+	ASSERT(bp1 != NULL);
+
+	/*
+	 * Read the block containing the "new" attr, if it is different
+	 */
+	if (args->blkno2 != args->blkno) {
+		error = xfs_da_read_buf(args->trans, args->dp, args->blkno2,
+					-1, &bp2, XFS_ATTR_FORK);
+		if (error) {
+			return(error);
+		}
+		ASSERT(bp2 != NULL);
+	} else {
+		bp2 = bp1;
+	}
+
+	leaf1 = bp1->data;
+	ASSERT(INT_GET(leaf1->hdr.info.magic, ARCH_CONVERT)
+						== XFS_ATTR_LEAF_MAGIC);
+	ASSERT(args->index < INT_GET(leaf1->hdr.count, ARCH_CONVERT));
+	ASSERT(args->index >= 0);
+	entry1 = &leaf1->entries[ args->index ];
+
+	leaf2 = bp2->data;
+	ASSERT(INT_GET(leaf2->hdr.info.magic, ARCH_CONVERT)
+						== XFS_ATTR_LEAF_MAGIC);
+	ASSERT(args->index2 < INT_GET(leaf2->hdr.count, ARCH_CONVERT));
+	ASSERT(args->index2 >= 0);
+	entry2 = &leaf2->entries[ args->index2 ];
+
+#ifdef DEBUG
+	if (entry1->flags & XFS_ATTR_LOCAL) {
+		name_loc = XFS_ATTR_LEAF_NAME_LOCAL(leaf1, args->index);
+		namelen1 = name_loc->namelen;
+		name1 = (char *)name_loc->nameval;
+	} else {
+		name_rmt = XFS_ATTR_LEAF_NAME_REMOTE(leaf1, args->index);
+		namelen1 = name_rmt->namelen;
+		name1 = (char *)name_rmt->name;
+	}
+	if (entry2->flags & XFS_ATTR_LOCAL) {
+		name_loc = XFS_ATTR_LEAF_NAME_LOCAL(leaf2, args->index2);
+		namelen2 = name_loc->namelen;
+		name2 = (char *)name_loc->nameval;
+	} else {
+		name_rmt = XFS_ATTR_LEAF_NAME_REMOTE(leaf2, args->index2);
+		namelen2 = name_rmt->namelen;
+		name2 = (char *)name_rmt->name;
+	}
+	ASSERT(INT_GET(entry1->hashval, ARCH_CONVERT) == INT_GET(entry2->hashval, ARCH_CONVERT));
+	ASSERT(namelen1 == namelen2);
+	ASSERT(memcmp(name1, name2, namelen1) == 0);
+#endif /* DEBUG */
+
+	ASSERT(entry1->flags & XFS_ATTR_INCOMPLETE);
+	ASSERT((entry2->flags & XFS_ATTR_INCOMPLETE) == 0);
+
+	entry1->flags &= ~XFS_ATTR_INCOMPLETE;
+	xfs_da_log_buf(args->trans, bp1,
+			  XFS_DA_LOGRANGE(leaf1, entry1, sizeof(*entry1)));
+	if (args->rmtblkno) {
+		ASSERT((entry1->flags & XFS_ATTR_LOCAL) == 0);
+		name_rmt = XFS_ATTR_LEAF_NAME_REMOTE(leaf1, args->index);
+		INT_SET(name_rmt->valueblk, ARCH_CONVERT, args->rmtblkno);
+		INT_SET(name_rmt->valuelen, ARCH_CONVERT, args->valuelen);
+		xfs_da_log_buf(args->trans, bp1,
+			 XFS_DA_LOGRANGE(leaf1, name_rmt, sizeof(*name_rmt)));
+	}
+
+	entry2->flags |= XFS_ATTR_INCOMPLETE;
+	xfs_da_log_buf(args->trans, bp2,
+			  XFS_DA_LOGRANGE(leaf2, entry2, sizeof(*entry2)));
+	if ((entry2->flags & XFS_ATTR_LOCAL) == 0) {
+		name_rmt = XFS_ATTR_LEAF_NAME_REMOTE(leaf2, args->index2);
+		name_rmt->valueblk = 0;
+		name_rmt->valuelen = 0;
+		xfs_da_log_buf(args->trans, bp2,
+			 XFS_DA_LOGRANGE(leaf2, name_rmt, sizeof(*name_rmt)));
+	}
+	xfs_da_buf_done(bp1);
+	if (bp1 != bp2)
+		xfs_da_buf_done(bp2);
+
+	/*
+	 * Commit the flag value change and start the next trans in series.
+	 */
+	error = xfs_attr_rolltrans(&args->trans, args->dp);
+
+	return(error);
+}
+
+/*========================================================================
+ * Indiscriminately delete the entire attribute fork
+ *========================================================================*/
+
+/*
+ * Recurse (gasp!) through the attribute nodes until we find leaves.
+ * We're doing a depth-first traversal in order to invalidate everything.
+ */
+int
+xfs_attr_root_inactive(xfs_trans_t **trans, xfs_inode_t *dp)
+{
+	xfs_da_blkinfo_t *info;
+	xfs_daddr_t blkno;
+	xfs_dabuf_t *bp;
+	int error;
+
+	/*
+	 * Read block 0 to see what we have to work with.
+	 * We only get here if we have extents, since we remove
+	 * the extents in reverse order the extent containing
+	 * block 0 must still be there.
+	 */
+	error = xfs_da_read_buf(*trans, dp, 0, -1, &bp, XFS_ATTR_FORK);
+	if (error)
+		return(error);
+	blkno = xfs_da_blkno(bp);
+
+	/*
+	 * Invalidate the tree, even if the "tree" is only a single leaf block.
+	 * This is a depth-first traversal!
+	 */
+	info = bp->data;
+	if (INT_GET(info->magic, ARCH_CONVERT) == XFS_DA_NODE_MAGIC) {
+		error = xfs_attr_node_inactive(trans, dp, bp, 1);
+	} else if (INT_GET(info->magic, ARCH_CONVERT) == XFS_ATTR_LEAF_MAGIC) {
+		error = xfs_attr_leaf_inactive(trans, dp, bp);
+	} else {
+		error = XFS_ERROR(EIO);
+		xfs_da_brelse(*trans, bp);
+	}
+	if (error)
+		return(error);
+
+	/*
+	 * Invalidate the incore copy of the root block.
+	 */
+	error = xfs_da_get_buf(*trans, dp, 0, blkno, &bp, XFS_ATTR_FORK);
+	if (error)
+		return(error);
+	xfs_da_binval(*trans, bp);	/* remove from cache */
+	/*
+	 * Commit the invalidate and start the next transaction.
+	 */
+	error = xfs_attr_rolltrans(trans, dp);
+
+	return (error);
+}
+
+/*
+ * Recurse (gasp!) through the attribute nodes until we find leaves.
+ * We're doing a depth-first traversal in order to invalidate everything.
+ */
+int
+xfs_attr_node_inactive(xfs_trans_t **trans, xfs_inode_t *dp, xfs_dabuf_t *bp,
+				   int level)
+{
+	xfs_da_blkinfo_t *info;
+	xfs_da_intnode_t *node;
+	xfs_dablk_t child_fsb;
+	xfs_daddr_t parent_blkno, child_blkno;
+	int error, count, i;
+	xfs_dabuf_t *child_bp;
+
+	/*
+	 * Since this code is recursive (gasp!) we must protect ourselves.
+	 */
+	if (level > XFS_DA_NODE_MAXDEPTH) {
+		xfs_da_brelse(*trans, bp);	/* no locks for later trans */
+		return(XFS_ERROR(EIO));
+	}
+
+	node = bp->data;
+	ASSERT(INT_GET(node->hdr.info.magic, ARCH_CONVERT)
+						== XFS_DA_NODE_MAGIC);
+	parent_blkno = xfs_da_blkno(bp);	/* save for re-read later */
+	count = INT_GET(node->hdr.count, ARCH_CONVERT);
+	if (!count) {
+		xfs_da_brelse(*trans, bp);
+		return(0);
+	}
+	child_fsb = INT_GET(node->btree[0].before, ARCH_CONVERT);
+	xfs_da_brelse(*trans, bp);	/* no locks for later trans */
+
+	/*
+	 * If this is the node level just above the leaves, simply loop
+	 * over the leaves removing all of them.  If this is higher up
+	 * in the tree, recurse downward.
+	 */
+	for (i = 0; i < count; i++) {
+		/*
+		 * Read the subsidiary block to see what we have to work with.
+		 * Don't do this in a transaction.  This is a depth-first
+		 * traversal of the tree so we may deal with many blocks
+		 * before we come back to this one.
+		 */
+		error = xfs_da_read_buf(*trans, dp, child_fsb, -2, &child_bp,
+						XFS_ATTR_FORK);
+		if (error)
+			return(error);
+		if (child_bp) {
+						/* save for re-read later */
+			child_blkno = xfs_da_blkno(child_bp);
+
+			/*
+			 * Invalidate the subtree, however we have to.
+			 */
+			info = child_bp->data;
+			if (INT_GET(info->magic, ARCH_CONVERT)
+							== XFS_DA_NODE_MAGIC) {
+				error = xfs_attr_node_inactive(trans, dp,
+						child_bp, level+1);
+			} else if (INT_GET(info->magic, ARCH_CONVERT)
+						== XFS_ATTR_LEAF_MAGIC) {
+				error = xfs_attr_leaf_inactive(trans, dp,
+						child_bp);
+			} else {
+				error = XFS_ERROR(EIO);
+				xfs_da_brelse(*trans, child_bp);
+			}
+			if (error)
+				return(error);
+
+			/*
+			 * Remove the subsidiary block from the cache
+			 * and from the log.
+			 */
+			error = xfs_da_get_buf(*trans, dp, 0, child_blkno,
+				&child_bp, XFS_ATTR_FORK);
+			if (error)
+				return(error);
+			xfs_da_binval(*trans, child_bp);
+		}
+
+		/*
+		 * If we're not done, re-read the parent to get the next
+		 * child block number.
+		 */
+		if ((i+1) < count) {
+			error = xfs_da_read_buf(*trans, dp, 0, parent_blkno,
+				&bp, XFS_ATTR_FORK);
+			if (error)
+				return(error);
+			child_fsb = INT_GET(node->btree[i+1].before, ARCH_CONVERT);
+			xfs_da_brelse(*trans, bp);
+		}
+		/*
+		 * Atomically commit the whole invalidate stuff.
+		 */
+		if ((error = xfs_attr_rolltrans(trans, dp)))
+			return (error);
+	}
+
+	return(0);
+}
+
+/*
+ * Invalidate all of the "remote" value regions pointed to by a particular
+ * leaf block.
+ * Note that we must release the lock on the buffer so that we are not
+ * caught holding something that the logging code wants to flush to disk.
+ */
+int
+xfs_attr_leaf_inactive(xfs_trans_t **trans, xfs_inode_t *dp, xfs_dabuf_t *bp)
+{
+	xfs_attr_leafblock_t *leaf;
+	xfs_attr_leaf_entry_t *entry;
+	xfs_attr_leaf_name_remote_t *name_rmt;
+	xfs_attr_inactive_list_t *list, *lp;
+	int error, count, size, tmp, i;
+
+	leaf = bp->data;
+	ASSERT(INT_GET(leaf->hdr.info.magic, ARCH_CONVERT)
+						== XFS_ATTR_LEAF_MAGIC);
+
+	/*
+	 * Count the number of "remote" value extents.
+	 */
+	count = 0;
+	entry = &leaf->entries[0];
+	for (i = 0; i < INT_GET(leaf->hdr.count, ARCH_CONVERT); entry++, i++) {
+		if (   INT_GET(entry->nameidx, ARCH_CONVERT)
+		    && ((entry->flags & XFS_ATTR_LOCAL) == 0)) {
+			name_rmt = XFS_ATTR_LEAF_NAME_REMOTE(leaf, i);
+			if (name_rmt->valueblk)
+				count++;
+		}
+	}
+
+	/*
+	 * If there are no "remote" values, we're done.
+	 */
+	if (count == 0) {
+		xfs_da_brelse(*trans, bp);
+		return(0);
+	}
+
+	/*
+	 * Allocate storage for a list of all the "remote" value extents.
+	 */
+	size = count * sizeof(xfs_attr_inactive_list_t);
+	list = (xfs_attr_inactive_list_t *)kmem_alloc(size, KM_SLEEP);
+
+	/*
+	 * Identify each of the "remote" value extents.
+	 */
+	lp = list;
+	entry = &leaf->entries[0];
+	for (i = 0; i < INT_GET(leaf->hdr.count, ARCH_CONVERT); entry++, i++) {
+		if (   INT_GET(entry->nameidx, ARCH_CONVERT)
+		    && ((entry->flags & XFS_ATTR_LOCAL) == 0)) {
+			name_rmt = XFS_ATTR_LEAF_NAME_REMOTE(leaf, i);
+			if (name_rmt->valueblk) {
+				/* both on-disk, don't endian flip twice */
+				lp->valueblk = name_rmt->valueblk;
+				INT_SET(lp->valuelen, ARCH_CONVERT,
+						XFS_B_TO_FSB(dp->i_mount,
+						    INT_GET(name_rmt->valuelen,
+							      ARCH_CONVERT)));
+				lp++;
+			}
+		}
+	}
+	xfs_da_brelse(*trans, bp);	/* unlock for trans. in freextent() */
+
+	/*
+	 * Invalidate each of the "remote" value extents.
+	 */
+	error = 0;
+	for (lp = list, i = 0; i < count; i++, lp++) {
+		tmp = xfs_attr_leaf_freextent(trans, dp,
+						     INT_GET(lp->valueblk,
+								ARCH_CONVERT),
+						     INT_GET(lp->valuelen,
+								ARCH_CONVERT));
+		if (error == 0)
+			error = tmp;	/* save only the 1st errno */
+	}
+
+	kmem_free((xfs_caddr_t)list, size);
+	return(error);
+}
+
+/*
+ * Look at all the extents for this logical region,
+ * invalidate any buffers that are incore/in transactions.
+ */
+int
+xfs_attr_leaf_freextent(xfs_trans_t **trans, xfs_inode_t *dp,
+				    xfs_dablk_t blkno, int blkcnt)
+{
+	xfs_bmbt_irec_t map;
+	xfs_dablk_t tblkno;
+	int tblkcnt, dblkcnt, nmap, error;
+	xfs_daddr_t dblkno;
+	xfs_buf_t *bp;
+
+	/*
+	 * Roll through the "value", invalidating the attribute value's
+	 * blocks.
+	 */
+	tblkno = blkno;
+	tblkcnt = blkcnt;
+	while (tblkcnt > 0) {
+		/*
+		 * Try to remember where we decided to put the value.
+		 */
+		nmap = 1;
+		error = xfs_bmapi(*trans, dp, (xfs_fileoff_t)tblkno, tblkcnt,
+					XFS_BMAPI_ATTRFORK | XFS_BMAPI_METADATA,
+					NULL, 0, &map, &nmap, NULL);
+		if (error) {
+			return(error);
+		}
+		ASSERT(nmap == 1);
+		ASSERT(map.br_startblock != DELAYSTARTBLOCK);
+
+		/*
+		 * If it's a hole, these are already unmapped
+		 * so there's nothing to invalidate.
+		 */
+		if (map.br_startblock != HOLESTARTBLOCK) {
+
+			dblkno = XFS_FSB_TO_DADDR(dp->i_mount,
+						  map.br_startblock);
+			dblkcnt = XFS_FSB_TO_BB(dp->i_mount,
+						map.br_blockcount);
+			bp = xfs_trans_get_buf(*trans,
+					dp->i_mount->m_ddev_targp,
+					dblkno, dblkcnt, XFS_BUF_LOCK);
+			xfs_trans_binval(*trans, bp);
+			/*
+			 * Roll to next transaction.
+			 */
+			if ((error = xfs_attr_rolltrans(trans, dp)))
+				return (error);
+		}
+
+		tblkno += map.br_blockcount;
+		tblkcnt -= map.br_blockcount;
+	}
+
+	return(0);
+}
+
+
+/*
+ * Roll from one trans in the sequence of PERMANENT transactions to the next.
+ */
+int
+xfs_attr_rolltrans(xfs_trans_t **transp, xfs_inode_t *dp)
+{
+	xfs_trans_t *trans;
+	unsigned int logres, count;
+	int	error;
+
+	/*
+	 * Ensure that the inode is always logged.
+	 */
+	trans = *transp;
+	xfs_trans_log_inode(trans, dp, XFS_ILOG_CORE);
+
+	/*
+	 * Copy the critical parameters from one trans to the next.
+	 */
+	logres = trans->t_log_res;
+	count = trans->t_log_count;
+	*transp = xfs_trans_dup(trans);
+
+	/*
+	 * Commit the current transaction.
+	 * If this commit failed, then it'd just unlock those items that
+	 * are not marked ihold. That also means that a filesystem shutdown
+	 * is in progress. The caller takes the responsibility to cancel
+	 * the duplicate transaction that gets returned.
+	 */
+	if ((error = xfs_trans_commit(trans, 0, NULL)))
+		return (error);
+
+	trans = *transp;
+
+	/*
+	 * Reserve space in the log for th next transaction.
+	 * This also pushes items in the "AIL", the list of logged items,
+	 * out to disk if they are taking up space at the tail of the log
+	 * that we want to use.  This requires that either nothing be locked
+	 * across this call, or that anything that is locked be logged in
+	 * the prior and the next transactions.
+	 */
+	error = xfs_trans_reserve(trans, 0, logres, 0,
+				  XFS_TRANS_PERM_LOG_RES, count);
+	/*
+	 *  Ensure that the inode is in the new transaction and locked.
+	 */
+	if (!error) {
+		xfs_trans_ijoin(trans, dp, XFS_ILOCK_EXCL);
+		xfs_trans_ihold(trans, dp);
+	}
+	return (error);
+
+}