xfs: add CRCs to attr leaf blocks

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Ben Myers <bpm@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>

5 files changed, 1177 insertions, 849 deletions

diff --git a/fs/xfs/xfs_attr.c b/fs/xfs/xfs_attr.c
index 7afef2810e4..e7068754159 100644
--- a/fs/xfs/xfs_attr.c
+++ b/fs/xfs/xfs_attr.c
@@ -819,7 +819,7 @@ xfs_attr_inactive(xfs_inode_t *dp)
 		error = 0;
 		goto out;
 	}
-	error = xfs_attr_root_inactive(&trans, dp);
+	error = xfs_attr3_root_inactive(&trans, dp);
 	if (error)
 		goto out;
 
@@ -905,7 +905,7 @@ xfs_attr_leaf_addname(xfs_da_args_t *args)
 	 */
 	dp = args->dp;
 	args->blkno = 0;
-	error = xfs_attr_leaf_read(args->trans, args->dp, args->blkno, -1, &bp);
+	error = xfs_attr3_leaf_read(args->trans, args->dp, args->blkno, -1, &bp);
 	if (error)
 		return error;
 
@@ -913,14 +913,14 @@ xfs_attr_leaf_addname(xfs_da_args_t *args)
 	 * Look up the given attribute in the leaf block.  Figure out if
 	 * the given flags produce an error or call for an atomic rename.
 	 */
-	retval = xfs_attr_leaf_lookup_int(bp, args);
+	retval = xfs_attr3_leaf_lookup_int(bp, args);
 	if ((args->flags & ATTR_REPLACE) && (retval == ENOATTR)) {
 		xfs_trans_brelse(args->trans, bp);
-		return(retval);
+		return retval;
 	} else if (retval == EEXIST) {
 		if (args->flags & ATTR_CREATE) {	/* pure create op */
 			xfs_trans_brelse(args->trans, bp);
-			return(retval);
+			return retval;
 		}
 
 		trace_xfs_attr_leaf_replace(args);
@@ -936,7 +936,7 @@ xfs_attr_leaf_addname(xfs_da_args_t *args)
 	 * Add the attribute to the leaf block, transitioning to a Btree
 	 * if required.
 	 */
-	retval = xfs_attr_leaf_add(bp, args);
+	retval = xfs_attr3_leaf_add(bp, args);
 	if (retval == ENOSPC) {
 		/*
 		 * Promote the attribute list to the Btree format, then
@@ -944,7 +944,7 @@ xfs_attr_leaf_addname(xfs_da_args_t *args)
 		 * can manage its own transactions.
 		 */
 		xfs_bmap_init(args->flist, args->firstblock);
-		error = xfs_attr_leaf_to_node(args);
+		error = xfs_attr3_leaf_to_node(args);
 		if (!error) {
 			error = xfs_bmap_finish(&args->trans, args->flist,
 						&committed);
@@ -1009,7 +1009,7 @@ xfs_attr_leaf_addname(xfs_da_args_t *args)
 		 * In a separate transaction, set the incomplete flag on the
 		 * "old" attr and clear the incomplete flag on the "new" attr.
 		 */
-		error = xfs_attr_leaf_flipflags(args);
+		error = xfs_attr3_leaf_flipflags(args);
 		if (error)
 			return(error);
 
@@ -1031,19 +1031,19 @@ xfs_attr_leaf_addname(xfs_da_args_t *args)
 		 * Read in the block containing the "old" attr, then
 		 * remove the "old" attr from that block (neat, huh!)
 		 */
-		error = xfs_attr_leaf_read(args->trans, args->dp, args->blkno,
+		error = xfs_attr3_leaf_read(args->trans, args->dp, args->blkno,
 					   -1, &bp);
 		if (error)
 			return error;
 
-		xfs_attr_leaf_remove(bp, args);
+		xfs_attr3_leaf_remove(bp, args);
 
 		/*
 		 * If the result is small enough, shrink it all into the inode.
 		 */
 		if ((forkoff = xfs_attr_shortform_allfit(bp, dp))) {
 			xfs_bmap_init(args->flist, args->firstblock);
-			error = xfs_attr_leaf_to_shortform(bp, args, forkoff);
+			error = xfs_attr3_leaf_to_shortform(bp, args, forkoff);
 			/* bp is gone due to xfs_da_shrink_inode */
 			if (!error) {
 				error = xfs_bmap_finish(&args->trans,
@@ -1075,9 +1075,9 @@ xfs_attr_leaf_addname(xfs_da_args_t *args)
 		/*
 		 * Added a "remote" value, just clear the incomplete flag.
 		 */
-		error = xfs_attr_leaf_clearflag(args);
+		error = xfs_attr3_leaf_clearflag(args);
 	}
-	return(error);
+	return error;
 }
 
 /*
@@ -1100,24 +1100,24 @@ xfs_attr_leaf_removename(xfs_da_args_t *args)
 	 */
 	dp = args->dp;
 	args->blkno = 0;
-	error = xfs_attr_leaf_read(args->trans, args->dp, args->blkno, -1, &bp);
+	error = xfs_attr3_leaf_read(args->trans, args->dp, args->blkno, -1, &bp);
 	if (error)
 		return error;
 
-	error = xfs_attr_leaf_lookup_int(bp, args);
+	error = xfs_attr3_leaf_lookup_int(bp, args);
 	if (error == ENOATTR) {
 		xfs_trans_brelse(args->trans, bp);
-		return(error);
+		return error;
 	}
 
-	xfs_attr_leaf_remove(bp, args);
+	xfs_attr3_leaf_remove(bp, args);
 
 	/*
 	 * If the result is small enough, shrink it all into the inode.
 	 */
 	if ((forkoff = xfs_attr_shortform_allfit(bp, dp))) {
 		xfs_bmap_init(args->flist, args->firstblock);
-		error = xfs_attr_leaf_to_shortform(bp, args, forkoff);
+		error = xfs_attr3_leaf_to_shortform(bp, args, forkoff);
 		/* bp is gone due to xfs_da_shrink_inode */
 		if (!error) {
 			error = xfs_bmap_finish(&args->trans, args->flist,
@@ -1127,7 +1127,7 @@ xfs_attr_leaf_removename(xfs_da_args_t *args)
 			ASSERT(committed);
 			args->trans = NULL;
 			xfs_bmap_cancel(args->flist);
-			return(error);
+			return error;
 		}
 
 		/*
@@ -1137,7 +1137,7 @@ xfs_attr_leaf_removename(xfs_da_args_t *args)
 		if (committed)
 			xfs_trans_ijoin(args->trans, dp, 0);
 	}
-	return(0);
+	return 0;
 }
 
 /*
@@ -1155,21 +1155,21 @@ xfs_attr_leaf_get(xfs_da_args_t *args)
 	trace_xfs_attr_leaf_get(args);
 
 	args->blkno = 0;
-	error = xfs_attr_leaf_read(args->trans, args->dp, args->blkno, -1, &bp);
+	error = xfs_attr3_leaf_read(args->trans, args->dp, args->blkno, -1, &bp);
 	if (error)
 		return error;
 
-	error = xfs_attr_leaf_lookup_int(bp, args);
+	error = xfs_attr3_leaf_lookup_int(bp, args);
 	if (error != EEXIST)  {
 		xfs_trans_brelse(args->trans, bp);
-		return(error);
+		return error;
 	}
-	error = xfs_attr_leaf_getvalue(bp, args);
+	error = xfs_attr3_leaf_getvalue(bp, args);
 	xfs_trans_brelse(args->trans, bp);
 	if (!error && (args->rmtblkno > 0) && !(args->flags & ATTR_KERNOVAL)) {
 		error = xfs_attr_rmtval_get(args);
 	}
-	return(error);
+	return error;
 }
 
 /*
@@ -1184,11 +1184,11 @@ xfs_attr_leaf_list(xfs_attr_list_context_t *context)
 	trace_xfs_attr_leaf_list(context);
 
 	context->cursor->blkno = 0;
-	error = xfs_attr_leaf_read(NULL, context->dp, 0, -1, &bp);
+	error = xfs_attr3_leaf_read(NULL, context->dp, 0, -1, &bp);
 	if (error)
 		return XFS_ERROR(error);
 
-	error = xfs_attr_leaf_list_int(bp, context);
+	error = xfs_attr3_leaf_list_int(bp, context);
 	xfs_trans_brelse(NULL, bp);
 	return XFS_ERROR(error);
 }
@@ -1257,7 +1257,7 @@ restart:
 		args->rmtblkcnt = 0;
 	}
 
-	retval = xfs_attr_leaf_add(blk->bp, state->args);
+	retval = xfs_attr3_leaf_add(blk->bp, state->args);
 	if (retval == ENOSPC) {
 		if (state->path.active == 1) {
 			/*
@@ -1267,7 +1267,7 @@ restart:
 			 */
 			xfs_da_state_free(state);
 			xfs_bmap_init(args->flist, args->firstblock);
-			error = xfs_attr_leaf_to_node(args);
+			error = xfs_attr3_leaf_to_node(args);
 			if (!error) {
 				error = xfs_bmap_finish(&args->trans,
 							args->flist,
@@ -1369,7 +1369,7 @@ restart:
 		 * In a separate transaction, set the incomplete flag on the
 		 * "old" attr and clear the incomplete flag on the "new" attr.
 		 */
-		error = xfs_attr_leaf_flipflags(args);
+		error = xfs_attr3_leaf_flipflags(args);
 		if (error)
 			goto out;
 
@@ -1408,7 +1408,7 @@ restart:
 		 */
 		blk = &state->path.blk[ state->path.active-1 ];
 		ASSERT(blk->magic == XFS_ATTR_LEAF_MAGIC);
-		error = xfs_attr_leaf_remove(blk->bp, args);
+		error = xfs_attr3_leaf_remove(blk->bp, args);
 		xfs_da3_fixhashpath(state, &state->path);
 
 		/*
@@ -1449,7 +1449,7 @@ restart:
 		/*
 		 * Added a "remote" value, just clear the incomplete flag.
 		 */
-		error = xfs_attr_leaf_clearflag(args);
+		error = xfs_attr3_leaf_clearflag(args);
 		if (error)
 			goto out;
 	}
@@ -1523,7 +1523,7 @@ xfs_attr_node_removename(xfs_da_args_t *args)
 		 * Mark the attribute as INCOMPLETE, then bunmapi() the
 		 * remote value.
 		 */
-		error = xfs_attr_leaf_setflag(args);
+		error = xfs_attr3_leaf_setflag(args);
 		if (error)
 			goto out;
 		error = xfs_attr_rmtval_remove(args);
@@ -1544,7 +1544,7 @@ xfs_attr_node_removename(xfs_da_args_t *args)
 	 */
 	blk = &state->path.blk[ state->path.active-1 ];
 	ASSERT(blk->magic == XFS_ATTR_LEAF_MAGIC);
-	retval = xfs_attr_leaf_remove(blk->bp, args);
+	retval = xfs_attr3_leaf_remove(blk->bp, args);
 	xfs_da3_fixhashpath(state, &state->path);
 
 	/*
@@ -1590,13 +1590,13 @@ xfs_attr_node_removename(xfs_da_args_t *args)
 		ASSERT(state->path.blk[0].bp);
 		state->path.blk[0].bp = NULL;
 
-		error = xfs_attr_leaf_read(args->trans, args->dp, 0, -1, &bp);
+		error = xfs_attr3_leaf_read(args->trans, args->dp, 0, -1, &bp);
 		if (error)
 			goto out;
 
 		if ((forkoff = xfs_attr_shortform_allfit(bp, dp))) {
 			xfs_bmap_init(args->flist, args->firstblock);
-			error = xfs_attr_leaf_to_shortform(bp, args, forkoff);
+			error = xfs_attr3_leaf_to_shortform(bp, args, forkoff);
 			/* bp is gone due to xfs_da_shrink_inode */
 			if (!error) {
 				error = xfs_bmap_finish(&args->trans,
@@ -1768,7 +1768,7 @@ xfs_attr_node_get(xfs_da_args_t *args)
 		/*
 		 * Get the value, local or "remote"
 		 */
-		retval = xfs_attr_leaf_getvalue(blk->bp, args);
+		retval = xfs_attr3_leaf_getvalue(blk->bp, args);
 		if (!retval && (args->rmtblkno > 0)
 		    && !(args->flags & ATTR_KERNOVAL)) {
 			retval = xfs_attr_rmtval_get(args);
@@ -1793,7 +1793,9 @@ xfs_attr_node_list(xfs_attr_list_context_t *context)
 	attrlist_cursor_kern_t *cursor;
 	xfs_attr_leafblock_t *leaf;
 	xfs_da_intnode_t *node;
-	xfs_da_node_entry_t *btree;
+	struct xfs_attr3_icleaf_hdr leafhdr;
+	struct xfs_da3_icnode_hdr nodehdr;
+	struct xfs_da_node_entry *btree;
 	int error, i;
 	struct xfs_buf *bp;
 
@@ -1814,22 +1816,28 @@ xfs_attr_node_list(xfs_attr_list_context_t *context)
 		if ((error != 0) && (error != EFSCORRUPTED))
 			return(error);
 		if (bp) {
+			struct xfs_attr_leaf_entry *entries;
+
 			node = bp->b_addr;
 			switch (be16_to_cpu(node->hdr.info.magic)) {
 			case XFS_DA_NODE_MAGIC:
+			case XFS_DA3_NODE_MAGIC:
 				trace_xfs_attr_list_wrong_blk(context);
 				xfs_trans_brelse(NULL, bp);
 				bp = NULL;
 				break;
 			case XFS_ATTR_LEAF_MAGIC:
+			case XFS_ATTR3_LEAF_MAGIC:
 				leaf = bp->b_addr;
-				if (cursor->hashval > be32_to_cpu(leaf->entries[
-				    be16_to_cpu(leaf->hdr.count)-1].hashval)) {
+				xfs_attr3_leaf_hdr_from_disk(&leafhdr, leaf);
+				entries = xfs_attr3_leaf_entryp(leaf);
+				if (cursor->hashval > be32_to_cpu(
+						entries[leafhdr.count - 1].hashval)) {
 					trace_xfs_attr_list_wrong_blk(context);
 					xfs_trans_brelse(NULL, bp);
 					bp = NULL;
-				} else if (cursor->hashval <=
-					     be32_to_cpu(leaf->entries[0].hashval)) {
+				} else if (cursor->hashval <= be32_to_cpu(
+						entries[0].hashval)) {
 					trace_xfs_attr_list_wrong_blk(context);
 					xfs_trans_brelse(NULL, bp);
 					bp = NULL;
@@ -1851,27 +1859,31 @@ xfs_attr_node_list(xfs_attr_list_context_t *context)
 	if (bp == NULL) {
 		cursor->blkno = 0;
 		for (;;) {
+			__uint16_t magic;
+
 			error = xfs_da3_node_read(NULL, context->dp,
 						      cursor->blkno, -1, &bp,
 						      XFS_ATTR_FORK);
 			if (error)
 				return(error);
 			node = bp->b_addr;
-			if (node->hdr.info.magic ==
-			    cpu_to_be16(XFS_ATTR_LEAF_MAGIC))
+			magic = be16_to_cpu(node->hdr.info.magic);
+			if (magic == XFS_ATTR_LEAF_MAGIC ||
+			    magic == XFS_ATTR3_LEAF_MAGIC)
 				break;
-			if (unlikely(node->hdr.info.magic !=
-				     cpu_to_be16(XFS_DA_NODE_MAGIC))) {
+			if (magic != XFS_DA_NODE_MAGIC &&
+			    magic != XFS_DA3_NODE_MAGIC) {
 				XFS_CORRUPTION_ERROR("xfs_attr_node_list(3)",
 						     XFS_ERRLEVEL_LOW,
 						     context->dp->i_mount,
 						     node);
 				xfs_trans_brelse(NULL, bp);
-				return(XFS_ERROR(EFSCORRUPTED));
+				return XFS_ERROR(EFSCORRUPTED);
 			}
+
+			xfs_da3_node_hdr_from_disk(&nodehdr, node);
 			btree = xfs_da3_node_tree_p(node);
-			for (i = 0; i < be16_to_cpu(node->hdr.count);
-								btree++, i++) {
+			for (i = 0; i < nodehdr.count; btree++, i++) {
 				if (cursor->hashval
 						<= be32_to_cpu(btree->hashval)) {
 					cursor->blkno = be32_to_cpu(btree->before);
@@ -1880,9 +1892,9 @@ xfs_attr_node_list(xfs_attr_list_context_t *context)
 					break;
 				}
 			}
-			if (i == be16_to_cpu(node->hdr.count)) {
+			if (i == nodehdr.count) {
 				xfs_trans_brelse(NULL, bp);
-				return(0);
+				return 0;
 			}
 			xfs_trans_brelse(NULL, bp);
 		}
@@ -1896,22 +1908,23 @@ xfs_attr_node_list(xfs_attr_list_context_t *context)
 	 */
 	for (;;) {
 		leaf = bp->b_addr;
-		error = xfs_attr_leaf_list_int(bp, context);
+		error = xfs_attr3_leaf_list_int(bp, context);
 		if (error) {
 			xfs_trans_brelse(NULL, bp);
 			return error;
 		}
-		if (context->seen_enough || leaf->hdr.info.forw == 0)
+		xfs_attr3_leaf_hdr_from_disk(&leafhdr, leaf);
+		if (context->seen_enough || leafhdr.forw == 0)
 			break;
-		cursor->blkno = be32_to_cpu(leaf->hdr.info.forw);
+		cursor->blkno = leafhdr.forw;
 		xfs_trans_brelse(NULL, bp);
-		error = xfs_attr_leaf_read(NULL, context->dp, cursor->blkno, -1,
+		error = xfs_attr3_leaf_read(NULL, context->dp, cursor->blkno, -1,
 					   &bp);
 		if (error)
 			return error;
 	}
 	xfs_trans_brelse(NULL, bp);
-	return(0);
+	return 0;
 }
 
 
diff --git a/fs/xfs/xfs_attr_leaf.c b/fs/xfs/xfs_attr_leaf.c
index 54b0dc8cc82..7f8b6c8a483 100644
--- a/fs/xfs/xfs_attr_leaf.c
+++ b/fs/xfs/xfs_attr_leaf.c
@@ -1,5 +1,6 @@
 /*
  * Copyright (c) 2000-2005 Silicon Graphics, Inc.
+ * Copyright (c) 2013 Red Hat, Inc.
  * All Rights Reserved.
  *
  * This program is free software; you can redistribute it and/or
@@ -39,6 +40,9 @@
 #include "xfs_attr_leaf.h"
 #include "xfs_error.h"
 #include "xfs_trace.h"
+#include "xfs_buf_item.h"
+#include "xfs_cksum.h"
+
 
 /*
  * xfs_attr_leaf.c
@@ -53,77 +57,213 @@
 /*
  * Routines used for growing the Btree.
  */
-STATIC int xfs_attr_leaf_create(xfs_da_args_t *args, xfs_dablk_t which_block,
-				struct xfs_buf **bpp);
-STATIC int xfs_attr_leaf_add_work(struct xfs_buf *leaf_buffer,
-				  xfs_da_args_t *args, int freemap_index);
-STATIC void xfs_attr_leaf_compact(struct xfs_da_args *args,
-				  struct xfs_buf *leaf_buffer);
-STATIC void xfs_attr_leaf_rebalance(xfs_da_state_t *state,
+STATIC int xfs_attr3_leaf_create(struct xfs_da_args *args,
+				 xfs_dablk_t which_block, struct xfs_buf **bpp);
+STATIC int xfs_attr3_leaf_add_work(struct xfs_buf *leaf_buffer,
+				   struct xfs_attr3_icleaf_hdr *ichdr,
+				   struct xfs_da_args *args, int freemap_index);
+STATIC void xfs_attr3_leaf_compact(struct xfs_da_args *args,
+				   struct xfs_attr3_icleaf_hdr *ichdr,
+				   struct xfs_buf *leaf_buffer);
+STATIC void xfs_attr3_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);
+STATIC int xfs_attr3_leaf_figure_balance(xfs_da_state_t *state,
+			xfs_da_state_blk_t *leaf_blk_1,
+			struct xfs_attr3_icleaf_hdr *ichdr1,
+			xfs_da_state_blk_t *leaf_blk_2,
+			struct xfs_attr3_icleaf_hdr *ichdr2,
+			int *number_entries_in_blk1,
+			int *number_usedbytes_in_blk1);
 
 /*
  * Routines used for shrinking the Btree.
  */
-STATIC int xfs_attr_node_inactive(xfs_trans_t **trans, xfs_inode_t *dp,
+STATIC int xfs_attr3_node_inactive(xfs_trans_t **trans, xfs_inode_t *dp,
 				  struct xfs_buf *bp, int level);
-STATIC int xfs_attr_leaf_inactive(xfs_trans_t **trans, xfs_inode_t *dp,
+STATIC int xfs_attr3_leaf_inactive(xfs_trans_t **trans, xfs_inode_t *dp,
 				  struct xfs_buf *bp);
-STATIC int xfs_attr_leaf_freextent(xfs_trans_t **trans, xfs_inode_t *dp,
+STATIC int xfs_attr3_leaf_freextent(xfs_trans_t **trans, xfs_inode_t *dp,
 				   xfs_dablk_t blkno, int blkcnt);
 
 /*
  * 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);
+STATIC void xfs_attr3_leaf_moveents(struct xfs_attr_leafblock *src_leaf,
+			struct xfs_attr3_icleaf_hdr *src_ichdr, int src_start,
+			struct xfs_attr_leafblock *dst_leaf,
+			struct xfs_attr3_icleaf_hdr *dst_ichdr, int dst_start,
+			int move_count, struct xfs_mount *mp);
 STATIC int xfs_attr_leaf_entsize(xfs_attr_leafblock_t *leaf, int index);
 
-static void
-xfs_attr_leaf_verify(
+void
+xfs_attr3_leaf_hdr_from_disk(
+	struct xfs_attr3_icleaf_hdr	*to,
+	struct xfs_attr_leafblock	*from)
+{
+	int	i;
+
+	ASSERT(from->hdr.info.magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC) ||
+	       from->hdr.info.magic == cpu_to_be16(XFS_ATTR3_LEAF_MAGIC));
+
+	if (from->hdr.info.magic == cpu_to_be16(XFS_ATTR3_LEAF_MAGIC)) {
+		struct xfs_attr3_leaf_hdr *hdr3 = (struct xfs_attr3_leaf_hdr *)from;
+
+		to->forw = be32_to_cpu(hdr3->info.hdr.forw);
+		to->back = be32_to_cpu(hdr3->info.hdr.back);
+		to->magic = be16_to_cpu(hdr3->info.hdr.magic);
+		to->count = be16_to_cpu(hdr3->count);
+		to->usedbytes = be16_to_cpu(hdr3->usedbytes);
+		to->firstused = be16_to_cpu(hdr3->firstused);
+		to->holes = hdr3->holes;
+
+		for (i = 0; i < XFS_ATTR_LEAF_MAPSIZE; i++) {
+			to->freemap[i].base = be16_to_cpu(hdr3->freemap[i].base);
+			to->freemap[i].size = be16_to_cpu(hdr3->freemap[i].size);
+		}
+		return;
+	}
+	to->forw = be32_to_cpu(from->hdr.info.forw);
+	to->back = be32_to_cpu(from->hdr.info.back);
+	to->magic = be16_to_cpu(from->hdr.info.magic);
+	to->count = be16_to_cpu(from->hdr.count);
+	to->usedbytes = be16_to_cpu(from->hdr.usedbytes);
+	to->firstused = be16_to_cpu(from->hdr.firstused);
+	to->holes = from->hdr.holes;
+
+	for (i = 0; i < XFS_ATTR_LEAF_MAPSIZE; i++) {
+		to->freemap[i].base = be16_to_cpu(from->hdr.freemap[i].base);
+		to->freemap[i].size = be16_to_cpu(from->hdr.freemap[i].size);
+	}
+}
+
+void
+xfs_attr3_leaf_hdr_to_disk(
+	struct xfs_attr_leafblock	*to,
+	struct xfs_attr3_icleaf_hdr	*from)
+{
+	int	i;
+
+	ASSERT(from->magic == XFS_ATTR_LEAF_MAGIC ||
+	       from->magic == XFS_ATTR3_LEAF_MAGIC);
+
+	if (from->magic == XFS_ATTR3_LEAF_MAGIC) {
+		struct xfs_attr3_leaf_hdr *hdr3 = (struct xfs_attr3_leaf_hdr *)to;
+
+		hdr3->info.hdr.forw = cpu_to_be32(from->forw);
+		hdr3->info.hdr.back = cpu_to_be32(from->back);
+		hdr3->info.hdr.magic = cpu_to_be16(from->magic);
+		hdr3->count = cpu_to_be16(from->count);
+		hdr3->usedbytes = cpu_to_be16(from->usedbytes);
+		hdr3->firstused = cpu_to_be16(from->firstused);
+		hdr3->holes = from->holes;
+		hdr3->pad1 = 0;
+
+		for (i = 0; i < XFS_ATTR_LEAF_MAPSIZE; i++) {
+			hdr3->freemap[i].base = cpu_to_be16(from->freemap[i].base);
+			hdr3->freemap[i].size = cpu_to_be16(from->freemap[i].size);
+		}
+		return;
+	}
+	to->hdr.info.forw = cpu_to_be32(from->forw);
+	to->hdr.info.back = cpu_to_be32(from->back);
+	to->hdr.info.magic = cpu_to_be16(from->magic);
+	to->hdr.count = cpu_to_be16(from->count);
+	to->hdr.usedbytes = cpu_to_be16(from->usedbytes);
+	to->hdr.firstused = cpu_to_be16(from->firstused);
+	to->hdr.holes = from->holes;
+	to->hdr.pad1 = 0;
+
+	for (i = 0; i < XFS_ATTR_LEAF_MAPSIZE; i++) {
+		to->hdr.freemap[i].base = cpu_to_be16(from->freemap[i].base);
+		to->hdr.freemap[i].size = cpu_to_be16(from->freemap[i].size);
+	}
+}
+
+static bool
+xfs_attr3_leaf_verify(
 	struct xfs_buf		*bp)
 {
 	struct xfs_mount	*mp = bp->b_target->bt_mount;
-	struct xfs_attr_leaf_hdr *hdr = bp->b_addr;
-	int			block_ok = 0;
+	struct xfs_attr_leafblock *leaf = bp->b_addr;
+	struct xfs_attr3_icleaf_hdr ichdr;
 
-	block_ok = hdr->info.magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC);
-	if (!block_ok) {
-		XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, hdr);
-		xfs_buf_ioerror(bp, EFSCORRUPTED);
+	xfs_attr3_leaf_hdr_from_disk(&ichdr, leaf);
+
+	if (xfs_sb_version_hascrc(&mp->m_sb)) {
+		struct xfs_da3_node_hdr *hdr3 = bp->b_addr;
+
+		if (ichdr.magic != XFS_ATTR3_LEAF_MAGIC)
+			return false;
+
+		if (!uuid_equal(&hdr3->info.uuid, &mp->m_sb.sb_uuid))
+			return false;
+		if (be64_to_cpu(hdr3->info.blkno) != bp->b_bn)
+			return false;
+	} else {
+		if (ichdr.magic != XFS_ATTR_LEAF_MAGIC)
+			return false;
 	}
+	if (ichdr.count == 0)
+		return false;
+
+	/* XXX: need to range check rest of attr header values */
+	/* XXX: hash order check? */
+
+	return true;
 }
 
 static void
-xfs_attr_leaf_read_verify(
+xfs_attr3_leaf_write_verify(
 	struct xfs_buf	*bp)
 {
-	xfs_attr_leaf_verify(bp);
+	struct xfs_mount	*mp = bp->b_target->bt_mount;
+	struct xfs_buf_log_item	*bip = bp->b_fspriv;
+	struct xfs_attr3_leaf_hdr *hdr3 = bp->b_addr;
+
+	if (!xfs_attr3_leaf_verify(bp)) {
+		XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, bp->b_addr);
+		xfs_buf_ioerror(bp, EFSCORRUPTED);
+		return;
+	}
+
+	if (!xfs_sb_version_hascrc(&mp->m_sb))
+		return;
+
+	if (bip)
+		hdr3->info.lsn = cpu_to_be64(bip->bli_item.li_lsn);
+
+	xfs_update_cksum(bp->b_addr, BBTOB(bp->b_length), XFS_ATTR3_LEAF_CRC_OFF);
 }
 
+/*
+ * leaf/node format detection on trees is sketchy, so a node read can be done on
+ * leaf level blocks when detection identifies the tree as a node format tree
+ * incorrectly. In this case, we need to swap the verifier to match the correct
+ * format of the block being read.
+ */
 static void
-xfs_attr_leaf_write_verify(
-	struct xfs_buf	*bp)
+xfs_attr3_leaf_read_verify(
+	struct xfs_buf		*bp)
 {
-	xfs_attr_leaf_verify(bp);
+	struct xfs_mount	*mp = bp->b_target->bt_mount;
+
+	if ((xfs_sb_version_hascrc(&mp->m_sb) &&
+	     !xfs_verify_cksum(bp->b_addr, BBTOB(bp->b_length),
+					  XFS_ATTR3_LEAF_CRC_OFF)) ||
+	    !xfs_attr3_leaf_verify(bp)) {
+		XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, bp->b_addr);
+		xfs_buf_ioerror(bp, EFSCORRUPTED);
+	}
 }
 
-const struct xfs_buf_ops xfs_attr_leaf_buf_ops = {
-	.verify_read = xfs_attr_leaf_read_verify,
-	.verify_write = xfs_attr_leaf_write_verify,
+const struct xfs_buf_ops xfs_attr3_leaf_buf_ops = {
+	.verify_read = xfs_attr3_leaf_read_verify,
+	.verify_write = xfs_attr3_leaf_write_verify,
 };
 
 int
-xfs_attr_leaf_read(
+xfs_attr3_leaf_read(
 	struct xfs_trans	*tp,
 	struct xfs_inode	*dp,
 	xfs_dablk_t		bno,
@@ -131,7 +271,7 @@ xfs_attr_leaf_read(
 	struct xfs_buf		**bpp)
 {
 	return xfs_da_read_buf(tp, dp, bno, mappedbno, bpp,
-				XFS_ATTR_FORK, &xfs_attr_leaf_buf_ops);
+				XFS_ATTR_FORK, &xfs_attr3_leaf_buf_ops);
 }
 
 /*========================================================================
@@ -559,7 +699,7 @@ xfs_attr_shortform_to_leaf(xfs_da_args_t *args)
 	}
 
 	ASSERT(blkno == 0);
-	error = xfs_attr_leaf_create(args, blkno, &bp);
+	error = xfs_attr3_leaf_create(args, blkno, &bp);
 	if (error) {
 		error = xfs_da_shrink_inode(args, 0, bp);
 		bp = NULL;
@@ -588,9 +728,9 @@ xfs_attr_shortform_to_leaf(xfs_da_args_t *args)
 		nargs.hashval = xfs_da_hashname(sfe->nameval,
 						sfe->namelen);
 		nargs.flags = XFS_ATTR_NSP_ONDISK_TO_ARGS(sfe->flags);
-		error = xfs_attr_leaf_lookup_int(bp, &nargs); /* set a->index */
+		error = xfs_attr3_leaf_lookup_int(bp, &nargs); /* set a->index */
 		ASSERT(error == ENOATTR);
-		error = xfs_attr_leaf_add(bp, &nargs);
+		error = xfs_attr3_leaf_add(bp, &nargs);
 		ASSERT(error != ENOSPC);
 		if (error)
 			goto out;
@@ -803,7 +943,7 @@ xfs_attr_shortform_allfit(
 			continue;		/* don't copy partial entries */
 		if (!(entry->flags & XFS_ATTR_LOCAL))
 			return(0);
-		name_loc = xfs_attr_leaf_name_local(leaf, i);
+		name_loc = xfs_attr3_leaf_name_local(leaf, i);
 		if (name_loc->namelen >= XFS_ATTR_SF_ENTSIZE_MAX)
 			return(0);
 		if (be16_to_cpu(name_loc->valuelen) >= XFS_ATTR_SF_ENTSIZE_MAX)
@@ -823,29 +963,34 @@ xfs_attr_shortform_allfit(
  * Convert a leaf attribute list to shortform attribute list
  */
 int
-xfs_attr_leaf_to_shortform(
-	struct xfs_buf	*bp,
-	xfs_da_args_t	*args,
-	int		forkoff)
+xfs_attr3_leaf_to_shortform(
+	struct xfs_buf		*bp,
+	struct xfs_da_args	*args,
+	int			forkoff)
 {
-	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;
+	struct xfs_attr_leafblock *leaf;
+	struct xfs_attr3_icleaf_hdr ichdr;
+	struct xfs_attr_leaf_entry *entry;
+	struct xfs_attr_leaf_name_local *name_loc;
+	struct xfs_da_args	nargs;
+	struct xfs_inode	*dp = args->dp;
+	char			*tmpbuffer;
+	int			error;
+	int			i;
 
 	trace_xfs_attr_leaf_to_sf(args);
 
-	dp = args->dp;
 	tmpbuffer = kmem_alloc(XFS_LBSIZE(dp->i_mount), KM_SLEEP);
-	ASSERT(tmpbuffer != NULL);
+	if (!tmpbuffer)
+		return ENOMEM;
 
-	ASSERT(bp != NULL);
 	memcpy(tmpbuffer, bp->b_addr, XFS_LBSIZE(dp->i_mount));
+
 	leaf = (xfs_attr_leafblock_t *)tmpbuffer;
-	ASSERT(leaf->hdr.info.magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC));
+	xfs_attr3_leaf_hdr_from_disk(&ichdr, leaf);
+	entry = xfs_attr3_leaf_entryp(leaf);
+
+	/* XXX (dgc): buffer is about to be marked stale - why zero it? */
 	memset(bp->b_addr, 0, XFS_LBSIZE(dp->i_mount));
 
 	/*
@@ -875,14 +1020,14 @@ xfs_attr_leaf_to_shortform(
 	nargs.whichfork = XFS_ATTR_FORK;
 	nargs.trans = args->trans;
 	nargs.op_flags = XFS_DA_OP_OKNOENT;
-	entry = &leaf->entries[0];
-	for (i = 0; i < be16_to_cpu(leaf->hdr.count); entry++, i++) {
+
+	for (i = 0; i < ichdr.count; 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);
+		name_loc = xfs_attr3_leaf_name_local(leaf, i);
 		nargs.name = name_loc->nameval;
 		nargs.namelen = name_loc->namelen;
 		nargs.value = &name_loc->nameval[nargs.namelen];
@@ -895,43 +1040,50 @@ xfs_attr_leaf_to_shortform(
 
 out:
 	kmem_free(tmpbuffer);
-	return(error);
+	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_attr3_leaf_to_node(
+	struct xfs_da_args	*args)
 {
-	xfs_attr_leafblock_t *leaf;
-	xfs_da_intnode_t *node;
-	xfs_inode_t *dp;
-	struct xfs_buf *bp1, *bp2;
-	xfs_dablk_t blkno;
-	int error;
+	struct xfs_attr_leafblock *leaf;
+	struct xfs_attr3_icleaf_hdr icleafhdr;
+	struct xfs_attr_leaf_entry *entries;
 	struct xfs_da_node_entry *btree;
+	struct xfs_da3_icnode_hdr icnodehdr;
+	struct xfs_da_intnode	*node;
+	struct xfs_inode	*dp = args->dp;
+	struct xfs_mount	*mp = dp->i_mount;
+	struct xfs_buf		*bp1 = NULL;
+	struct xfs_buf		*bp2 = NULL;
+	xfs_dablk_t		blkno;
+	int			error;
 
 	trace_xfs_attr_leaf_to_node(args);
 
-	dp = args->dp;
-	bp1 = bp2 = NULL;
 	error = xfs_da_grow_inode(args, &blkno);
 	if (error)
 		goto out;
-	error = xfs_attr_leaf_read(args->trans, args->dp, 0, -1, &bp1);
+	error = xfs_attr3_leaf_read(args->trans, dp, 0, -1, &bp1);
 	if (error)
 		goto out;
 
-	bp2 = NULL;
-	error = xfs_da_get_buf(args->trans, args->dp, blkno, -1, &bp2,
-					    XFS_ATTR_FORK);
+	error = xfs_da_get_buf(args->trans, dp, blkno, -1, &bp2, XFS_ATTR_FORK);
 	if (error)
 		goto out;
+
+	/* copy leaf to new buffer, update identifiers */
 	bp2->b_ops = bp1->b_ops;
-	memcpy(bp2->b_addr, bp1->b_addr, XFS_LBSIZE(dp->i_mount));
-	bp1 = NULL;
-	xfs_trans_log_buf(args->trans, bp2, 0, XFS_LBSIZE(dp->i_mount) - 1);
+	memcpy(bp2->b_addr, bp1->b_addr, XFS_LBSIZE(mp));
+	if (xfs_sb_version_hascrc(&mp->m_sb)) {
+		struct xfs_da3_blkinfo *hdr3 = bp2->b_addr;
+		hdr3->blkno = cpu_to_be64(bp2->b_bn);
+	}
+	xfs_trans_log_buf(args->trans, bp2, 0, XFS_LBSIZE(mp) - 1);
 
 	/*
 	 * Set up the new root node.
@@ -940,17 +1092,22 @@ xfs_attr_leaf_to_node(xfs_da_args_t *args)
 	if (error)
 		goto out;
 	node = bp1->b_addr;
+	xfs_da3_node_hdr_from_disk(&icnodehdr, node);
+	btree = xfs_da3_node_tree_p(node);
+
 	leaf = bp2->b_addr;
-	ASSERT(leaf->hdr.info.magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC));
+	xfs_attr3_leaf_hdr_from_disk(&icleafhdr, leaf);
+	entries = xfs_attr3_leaf_entryp(leaf);
+
 	/* both on-disk, don't endian-flip twice */
-	btree = xfs_da3_node_tree_p(node);
-	btree[0].hashval = leaf->entries[be16_to_cpu(leaf->hdr.count)-1 ].hashval;
+	btree[0].hashval = entries[icleafhdr.count - 1].hashval;
 	btree[0].before = cpu_to_be32(blkno);
-	node->hdr.count = cpu_to_be16(1);
-	xfs_trans_log_buf(args->trans, bp1, 0, XFS_LBSIZE(dp->i_mount) - 1);
+	icnodehdr.count = 1;
+	xfs_da3_node_hdr_to_disk(node, &icnodehdr);
+	xfs_trans_log_buf(args->trans, bp1, 0, XFS_LBSIZE(mp) - 1);
 	error = 0;
 out:
-	return(error);
+	return error;
 }
 
 
@@ -963,52 +1120,62 @@ out:
  * or a leaf in a node attribute list.
  */
 STATIC int
-xfs_attr_leaf_create(
-	xfs_da_args_t	*args,
-	xfs_dablk_t	blkno,
-	struct xfs_buf	**bpp)
+xfs_attr3_leaf_create(
+	struct xfs_da_args	*args,
+	xfs_dablk_t		blkno,
+	struct xfs_buf		**bpp)
 {
-	xfs_attr_leafblock_t *leaf;
-	xfs_attr_leaf_hdr_t *hdr;
-	xfs_inode_t *dp;
-	struct xfs_buf *bp;
-	int error;
+	struct xfs_attr_leafblock *leaf;
+	struct xfs_attr3_icleaf_hdr ichdr;
+	struct xfs_inode	*dp = args->dp;
+	struct xfs_mount	*mp = dp->i_mount;
+	struct xfs_buf		*bp;
+	int			error;
 
 	trace_xfs_attr_leaf_create(args);
 
-	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);
-	bp->b_ops = &xfs_attr_leaf_buf_ops;
+		return error;
+	bp->b_ops = &xfs_attr3_leaf_buf_ops;
 	leaf = bp->b_addr;
-	memset((char *)leaf, 0, XFS_LBSIZE(dp->i_mount));
-	hdr = &leaf->hdr;
-	hdr->info.magic = cpu_to_be16(XFS_ATTR_LEAF_MAGIC);
-	hdr->firstused = cpu_to_be16(XFS_LBSIZE(dp->i_mount));
-	if (!hdr->firstused) {
-		hdr->firstused = cpu_to_be16(
-			XFS_LBSIZE(dp->i_mount) - XFS_ATTR_LEAF_NAME_ALIGN);
-	}
+	memset(leaf, 0, XFS_LBSIZE(mp));
+
+	memset(&ichdr, 0, sizeof(ichdr));
+	ichdr.firstused = XFS_LBSIZE(mp);
+
+	if (xfs_sb_version_hascrc(&mp->m_sb)) {
+		struct xfs_da3_blkinfo *hdr3 = bp->b_addr;
+
+		ichdr.magic = XFS_ATTR3_LEAF_MAGIC;
+
+		hdr3->blkno = cpu_to_be64(bp->b_bn);
+		hdr3->owner = cpu_to_be64(dp->i_ino);
+		uuid_copy(&hdr3->uuid, &mp->m_sb.sb_uuid);
 
-	hdr->freemap[0].base = cpu_to_be16(sizeof(xfs_attr_leaf_hdr_t));
-	hdr->freemap[0].size = cpu_to_be16(be16_to_cpu(hdr->firstused) -
-					   sizeof(xfs_attr_leaf_hdr_t));
+		ichdr.freemap[0].base = sizeof(struct xfs_attr3_leaf_hdr);
+	} else {
+		ichdr.magic = XFS_ATTR_LEAF_MAGIC;
+		ichdr.freemap[0].base = sizeof(struct xfs_attr_leaf_hdr);
+	}
+	ichdr.freemap[0].size = ichdr.firstused - ichdr.freemap[0].base;
 
-	xfs_trans_log_buf(args->trans, bp, 0, XFS_LBSIZE(dp->i_mount) - 1);
+	xfs_attr3_leaf_hdr_to_disk(leaf, &ichdr);
+	xfs_trans_log_buf(args->trans, bp, 0, XFS_LBSIZE(mp) - 1);
 
 	*bpp = bp;
-	return(0);
+	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_attr3_leaf_split(
+	struct xfs_da_state	*state,
+	struct xfs_da_state_blk	*oldblk,
+	struct xfs_da_state_blk	*newblk)
 {
 	xfs_dablk_t blkno;
 	int error;
@@ -1022,7 +1189,7 @@ xfs_attr_leaf_split(xfs_da_state_t *state, xfs_da_state_blk_t *oldblk,
 	error = xfs_da_grow_inode(state->args, &blkno);
 	if (error)
 		return(error);
-	error = xfs_attr_leaf_create(state->args, blkno, &newblk->bp);
+	error = xfs_attr3_leaf_create(state->args, blkno, &newblk->bp);
 	if (error)
 		return(error);
 	newblk->blkno = blkno;
@@ -1032,7 +1199,7 @@ xfs_attr_leaf_split(xfs_da_state_t *state, xfs_da_state_blk_t *oldblk,
 	 * Rebalance the entries across the two leaves.
 	 * NOTE: rebalance() currently depends on the 2nd block being empty.
 	 */
-	xfs_attr_leaf_rebalance(state, oldblk, newblk);
+	xfs_attr3_leaf_rebalance(state, oldblk, newblk);
 	error = xfs_da3_blk_link(state, oldblk, newblk);
 	if (error)
 		return(error);
@@ -1046,10 +1213,10 @@ xfs_attr_leaf_split(xfs_da_state_t *state, xfs_da_state_blk_t *oldblk,
 	 */
 	if (state->inleaf) {
 		trace_xfs_attr_leaf_add_old(state->args);
-		error = xfs_attr_leaf_add(oldblk->bp, state->args);
+		error = xfs_attr3_leaf_add(oldblk->bp, state->args);
 	} else {
 		trace_xfs_attr_leaf_add_new(state->args);
-		error = xfs_attr_leaf_add(newblk->bp, state->args);
+		error = xfs_attr3_leaf_add(newblk->bp, state->args);
 	}
 
 	/*
@@ -1064,22 +1231,23 @@ xfs_attr_leaf_split(xfs_da_state_t *state, xfs_da_state_blk_t *oldblk,
  * Add a name to the leaf attribute list structure.
  */
 int
-xfs_attr_leaf_add(
+xfs_attr3_leaf_add(
 	struct xfs_buf		*bp,
 	struct xfs_da_args	*args)
 {
-	xfs_attr_leafblock_t *leaf;
-	xfs_attr_leaf_hdr_t *hdr;
-	xfs_attr_leaf_map_t *map;
-	int tablesize, entsize, sum, tmp, i;
+	struct xfs_attr_leafblock *leaf;
+	struct xfs_attr3_icleaf_hdr ichdr;
+	int			tablesize;
+	int			entsize;
+	int			sum;
+	int			tmp;
+	int			i;
 
 	trace_xfs_attr_leaf_add(args);
 
 	leaf = bp->b_addr;
-	ASSERT(leaf->hdr.info.magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC));
-	ASSERT((args->index >= 0)
-		&& (args->index <= be16_to_cpu(leaf->hdr.count)));
-	hdr = &leaf->hdr;
+	xfs_attr3_leaf_hdr_from_disk(&ichdr, leaf);
+	ASSERT(args->index >= 0 && args->index <= ichdr.count);
 	entsize = xfs_attr_leaf_newentsize(args->namelen, args->valuelen,
 			   args->trans->t_mountp->m_sb.sb_blocksize, NULL);
 
@@ -1087,25 +1255,23 @@ xfs_attr_leaf_add(
 	 * Search through freemap for first-fit on new name length.
 	 * (may ne