Linux-2.6.12-rc2v2.6.12-rc2

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

Let it rip!

19 files changed, 9226 insertions, 0 deletions

diff --git a/fs/hfsplus/Makefile b/fs/hfsplus/Makefile
new file mode 100644
index 00000000000..3cc0df73015
--- /dev/null
+++ b/fs/hfsplus/Makefile
@@ -0,0 +1,9 @@
+#
+## Makefile for the linux hfsplus filesystem routines.
+#
+
+obj-$(CONFIG_HFSPLUS_FS) += hfsplus.o
+
+hfsplus-objs := super.o options.o inode.o ioctl.o extents.o catalog.o dir.o btree.o \
+		bnode.o brec.o bfind.o tables.o unicode.o wrapper.o bitmap.o part_tbl.o
+
diff --git a/fs/hfsplus/bfind.c b/fs/hfsplus/bfind.c
new file mode 100644
index 00000000000..257cdde0514
--- /dev/null
+++ b/fs/hfsplus/bfind.c
@@ -0,0 +1,210 @@
+/*
+ *  linux/fs/hfsplus/bfind.c
+ *
+ * Copyright (C) 2001
+ * Brad Boyer (flar@allandria.com)
+ * (C) 2003 Ardis Technologies <roman@ardistech.com>
+ *
+ * Search routines for btrees
+ */
+
+#include <linux/slab.h>
+#include "hfsplus_fs.h"
+
+int hfs_find_init(struct hfs_btree *tree, struct hfs_find_data *fd)
+{
+	void *ptr;
+
+	fd->tree = tree;
+	fd->bnode = NULL;
+	ptr = kmalloc(tree->max_key_len * 2 + 4, GFP_KERNEL);
+	if (!ptr)
+		return -ENOMEM;
+	fd->search_key = ptr;
+	fd->key = ptr + tree->max_key_len + 2;
+	dprint(DBG_BNODE_REFS, "find_init: %d (%p)\n", tree->cnid, __builtin_return_address(0));
+	down(&tree->tree_lock);
+	return 0;
+}
+
+void hfs_find_exit(struct hfs_find_data *fd)
+{
+	hfs_bnode_put(fd->bnode);
+	kfree(fd->search_key);
+	dprint(DBG_BNODE_REFS, "find_exit: %d (%p)\n", fd->tree->cnid, __builtin_return_address(0));
+	up(&fd->tree->tree_lock);
+	fd->tree = NULL;
+}
+
+/* Find the record in bnode that best matches key (not greater than...)*/
+int __hfs_brec_find(struct hfs_bnode *bnode, struct hfs_find_data *fd)
+{
+	int cmpval;
+	u16 off, len, keylen;
+	int rec;
+	int b, e;
+	int res;
+
+	b = 0;
+	e = bnode->num_recs - 1;
+	res = -ENOENT;
+	do {
+		rec = (e + b) / 2;
+		len = hfs_brec_lenoff(bnode, rec, &off);
+		keylen = hfs_brec_keylen(bnode, rec);
+		hfs_bnode_read(bnode, fd->key, off, keylen);
+		cmpval = bnode->tree->keycmp(fd->key, fd->search_key);
+		if (!cmpval) {
+			e = rec;
+			res = 0;
+			goto done;
+		}
+		if (cmpval < 0)
+			b = rec + 1;
+		else
+			e = rec - 1;
+	} while (b <= e);
+	//printk("%d: %d,%d,%d\n", bnode->this, b, e, rec);
+	if (rec != e && e >= 0) {
+		len = hfs_brec_lenoff(bnode, e, &off);
+		keylen = hfs_brec_keylen(bnode, e);
+		hfs_bnode_read(bnode, fd->key, off, keylen);
+	}
+done:
+	fd->record = e;
+	fd->keyoffset = off;
+	fd->keylength = keylen;
+	fd->entryoffset = off + keylen;
+	fd->entrylength = len - keylen;
+	return res;
+}
+
+/* Traverse a B*Tree from the root to a leaf finding best fit to key */
+/* Return allocated copy of node found, set recnum to best record */
+int hfs_brec_find(struct hfs_find_data *fd)
+{
+	struct hfs_btree *tree;
+	struct hfs_bnode *bnode;
+	u32 nidx, parent;
+	__be32 data;
+	int height, res;
+
+	tree = fd->tree;
+	if (fd->bnode)
+		hfs_bnode_put(fd->bnode);
+	fd->bnode = NULL;
+	nidx = tree->root;
+	if (!nidx)
+		return -ENOENT;
+	height = tree->depth;
+	res = 0;
+	parent = 0;
+	for (;;) {
+		bnode = hfs_bnode_find(tree, nidx);
+		if (IS_ERR(bnode)) {
+			res = PTR_ERR(bnode);
+			bnode = NULL;
+			break;
+		}
+		if (bnode->height != height)
+			goto invalid;
+		if (bnode->type != (--height ? HFS_NODE_INDEX : HFS_NODE_LEAF))
+			goto invalid;
+		bnode->parent = parent;
+
+		res = __hfs_brec_find(bnode, fd);
+		if (!height)
+			break;
+		if (fd->record < 0)
+			goto release;
+
+		parent = nidx;
+		hfs_bnode_read(bnode, &data, fd->entryoffset, 4);
+		nidx = be32_to_cpu(data);
+		hfs_bnode_put(bnode);
+	}
+	fd->bnode = bnode;
+	return res;
+
+invalid:
+	printk("HFS+-fs: inconsistency in B*Tree (%d,%d,%d,%u,%u)\n",
+		height, bnode->height, bnode->type, nidx, parent);
+	res = -EIO;
+release:
+	hfs_bnode_put(bnode);
+	return res;
+}
+
+int hfs_brec_read(struct hfs_find_data *fd, void *rec, int rec_len)
+{
+	int res;
+
+	res = hfs_brec_find(fd);
+	if (res)
+		return res;
+	if (fd->entrylength > rec_len)
+		return -EINVAL;
+	hfs_bnode_read(fd->bnode, rec, fd->entryoffset, fd->entrylength);
+	return 0;
+}
+
+int hfs_brec_goto(struct hfs_find_data *fd, int cnt)
+{
+	struct hfs_btree *tree;
+	struct hfs_bnode *bnode;
+	int idx, res = 0;
+	u16 off, len, keylen;
+
+	bnode = fd->bnode;
+	tree = bnode->tree;
+
+	if (cnt < 0) {
+		cnt = -cnt;
+		while (cnt > fd->record) {
+			cnt -= fd->record + 1;
+			fd->record = bnode->num_recs - 1;
+			idx = bnode->prev;
+			if (!idx) {
+				res = -ENOENT;
+				goto out;
+			}
+			hfs_bnode_put(bnode);
+			bnode = hfs_bnode_find(tree, idx);
+			if (IS_ERR(bnode)) {
+				res = PTR_ERR(bnode);
+				bnode = NULL;
+				goto out;
+			}
+		}
+		fd->record -= cnt;
+	} else {
+		while (cnt >= bnode->num_recs - fd->record) {
+			cnt -= bnode->num_recs - fd->record;
+			fd->record = 0;
+			idx = bnode->next;
+			if (!idx) {
+				res = -ENOENT;
+				goto out;
+			}
+			hfs_bnode_put(bnode);
+			bnode = hfs_bnode_find(tree, idx);
+			if (IS_ERR(bnode)) {
+				res = PTR_ERR(bnode);
+				bnode = NULL;
+				goto out;
+			}
+		}
+		fd->record += cnt;
+	}
+
+	len = hfs_brec_lenoff(bnode, fd->record, &off);
+	keylen = hfs_brec_keylen(bnode, fd->record);
+	fd->keyoffset = off;
+	fd->keylength = keylen;
+	fd->entryoffset = off + keylen;
+	fd->entrylength = len - keylen;
+	hfs_bnode_read(bnode, fd->key, off, keylen);
+out:
+	fd->bnode = bnode;
+	return res;
+}
diff --git a/fs/hfsplus/bitmap.c b/fs/hfsplus/bitmap.c
new file mode 100644
index 00000000000..c7d316455fa
--- /dev/null
+++ b/fs/hfsplus/bitmap.c
@@ -0,0 +1,221 @@
+/*
+ *  linux/fs/hfsplus/bitmap.c
+ *
+ * Copyright (C) 2001
+ * Brad Boyer (flar@allandria.com)
+ * (C) 2003 Ardis Technologies <roman@ardistech.com>
+ *
+ * Handling of allocation file
+ */
+
+#include <linux/pagemap.h>
+
+#include "hfsplus_fs.h"
+#include "hfsplus_raw.h"
+
+#define PAGE_CACHE_BITS	(PAGE_CACHE_SIZE * 8)
+
+int hfsplus_block_allocate(struct super_block *sb, u32 size, u32 offset, u32 *max)
+{
+	struct page *page;
+	struct address_space *mapping;
+	__be32 *pptr, *curr, *end;
+	u32 mask, start, len, n;
+	__be32 val;
+	int i;
+
+	len = *max;
+	if (!len)
+		return size;
+
+	dprint(DBG_BITMAP, "block_allocate: %u,%u,%u\n", size, offset, len);
+	down(&HFSPLUS_SB(sb).alloc_file->i_sem);
+	mapping = HFSPLUS_SB(sb).alloc_file->i_mapping;
+	page = read_cache_page(mapping, offset / PAGE_CACHE_BITS,
+			       (filler_t *)mapping->a_ops->readpage, NULL);
+	pptr = kmap(page);
+	curr = pptr + (offset & (PAGE_CACHE_BITS - 1)) / 32;
+	i = offset % 32;
+	offset &= ~(PAGE_CACHE_BITS - 1);
+	if ((size ^ offset) / PAGE_CACHE_BITS)
+		end = pptr + PAGE_CACHE_BITS / 32;
+	else
+		end = pptr + ((size + 31) & (PAGE_CACHE_BITS - 1)) / 32;
+
+	/* scan the first partial u32 for zero bits */
+	val = *curr;
+	if (~val) {
+		n = be32_to_cpu(val);
+		mask = (1U << 31) >> i;
+		for (; i < 32; mask >>= 1, i++) {
+			if (!(n & mask))
+				goto found;
+		}
+	}
+	curr++;
+
+	/* scan complete u32s for the first zero bit */
+	while (1) {
+		while (curr < end) {
+			val = *curr;
+			if (~val) {
+				n = be32_to_cpu(val);
+				mask = 1 << 31;
+				for (i = 0; i < 32; mask >>= 1, i++) {
+					if (!(n & mask))
+						goto found;
+				}
+			}
+			curr++;
+		}
+		kunmap(page);
+		offset += PAGE_CACHE_BITS;
+		if (offset >= size)
+			break;
+		page = read_cache_page(mapping, offset / PAGE_CACHE_BITS,
+				       (filler_t *)mapping->a_ops->readpage, NULL);
+		curr = pptr = kmap(page);
+		if ((size ^ offset) / PAGE_CACHE_BITS)
+			end = pptr + PAGE_CACHE_BITS / 32;
+		else
+			end = pptr + ((size + 31) & (PAGE_CACHE_BITS - 1)) / 32;
+	}
+	dprint(DBG_BITMAP, "bitmap full\n");
+	start = size;
+	goto out;
+
+found:
+	start = offset + (curr - pptr) * 32 + i;
+	if (start >= size) {
+		dprint(DBG_BITMAP, "bitmap full\n");
+		goto out;
+	}
+	/* do any partial u32 at the start */
+	len = min(size - start, len);
+	while (1) {
+		n |= mask;
+		if (++i >= 32)
+			break;
+		mask >>= 1;
+		if (!--len || n & mask)
+			goto done;
+	}
+	if (!--len)
+		goto done;
+	*curr++ = cpu_to_be32(n);
+	/* do full u32s */
+	while (1) {
+		while (curr < end) {
+			n = be32_to_cpu(*curr);
+			if (len < 32)
+				goto last;
+			if (n) {
+				len = 32;
+				goto last;
+			}
+			*curr++ = cpu_to_be32(0xffffffff);
+			len -= 32;
+		}
+		set_page_dirty(page);
+		kunmap(page);
+		offset += PAGE_CACHE_BITS;
+		page = read_cache_page(mapping, offset / PAGE_CACHE_BITS,
+				       (filler_t *)mapping->a_ops->readpage, NULL);
+		pptr = kmap(page);
+		curr = pptr;
+		end = pptr + PAGE_CACHE_BITS / 32;
+	}
+last:
+	/* do any partial u32 at end */
+	mask = 1U << 31;
+	for (i = 0; i < len; i++) {
+		if (n & mask)
+			break;
+		n |= mask;
+		mask >>= 1;
+	}
+done:
+	*curr = cpu_to_be32(n);
+	set_page_dirty(page);
+	kunmap(page);
+	*max = offset + (curr - pptr) * 32 + i - start;
+	HFSPLUS_SB(sb).free_blocks -= *max;
+	sb->s_dirt = 1;
+	dprint(DBG_BITMAP, "-> %u,%u\n", start, *max);
+out:
+	up(&HFSPLUS_SB(sb).alloc_file->i_sem);
+	return start;
+}
+
+int hfsplus_block_free(struct super_block *sb, u32 offset, u32 count)
+{
+	struct page *page;
+	struct address_space *mapping;
+	__be32 *pptr, *curr, *end;
+	u32 mask, len, pnr;
+	int i;
+
+	/* is there any actual work to be done? */
+	if (!count)
+		return 0;
+
+	dprint(DBG_BITMAP, "block_free: %u,%u\n", offset, count);
+	/* are all of the bits in range? */
+	if ((offset + count) > HFSPLUS_SB(sb).total_blocks)
+		return -2;
+
+	down(&HFSPLUS_SB(sb).alloc_file->i_sem);
+	mapping = HFSPLUS_SB(sb).alloc_file->i_mapping;
+	pnr = offset / PAGE_CACHE_BITS;
+	page = read_cache_page(mapping, pnr, (filler_t *)mapping->a_ops->readpage, NULL);
+	pptr = kmap(page);
+	curr = pptr + (offset & (PAGE_CACHE_BITS - 1)) / 32;
+	end = pptr + PAGE_CACHE_BITS / 32;
+	len = count;
+
+	/* do any partial u32 at the start */
+	i = offset % 32;
+	if (i) {
+		int j = 32 - i;
+		mask = 0xffffffffU << j;
+		if (j > count) {
+			mask |= 0xffffffffU >> (i + count);
+			*curr++ &= cpu_to_be32(mask);
+			goto out;
+		}
+		*curr++ &= cpu_to_be32(mask);
+		count -= j;
+	}
+
+	/* do full u32s */
+	while (1) {
+		while (curr < end) {
+			if (count < 32)
+				goto done;
+			*curr++ = 0;
+			count -= 32;
+		}
+		if (!count)
+			break;
+		set_page_dirty(page);
+		kunmap(page);
+		page = read_cache_page(mapping, ++pnr, (filler_t *)mapping->a_ops->readpage, NULL);
+		pptr = kmap(page);
+		curr = pptr;
+		end = pptr + PAGE_CACHE_BITS / 32;
+	}
+done:
+	/* do any partial u32 at end */
+	if (count) {
+		mask = 0xffffffffU >> count;
+		*curr &= cpu_to_be32(mask);
+	}
+out:
+	set_page_dirty(page);
+	kunmap(page);
+	HFSPLUS_SB(sb).free_blocks += len;
+	sb->s_dirt = 1;
+	up(&HFSPLUS_SB(sb).alloc_file->i_sem);
+
+	return 0;
+}
diff --git a/fs/hfsplus/bnode.c b/fs/hfsplus/bnode.c
new file mode 100644
index 00000000000..267872e84d7
--- /dev/null
+++ b/fs/hfsplus/bnode.c
@@ -0,0 +1,662 @@
+/*
+ *  linux/fs/hfsplus/bnode.c
+ *
+ * Copyright (C) 2001
+ * Brad Boyer (flar@allandria.com)
+ * (C) 2003 Ardis Technologies <roman@ardistech.com>
+ *
+ * Handle basic btree node operations
+ */
+
+#include <linux/string.h>
+#include <linux/slab.h>
+#include <linux/pagemap.h>
+#include <linux/fs.h>
+#include <linux/swap.h>
+#include <linux/version.h>
+
+#include "hfsplus_fs.h"
+#include "hfsplus_raw.h"
+
+#define REF_PAGES	0
+
+/* Copy a specified range of bytes from the raw data of a node */
+void hfs_bnode_read(struct hfs_bnode *node, void *buf, int off, int len)
+{
+	struct page **pagep;
+	int l;
+
+	off += node->page_offset;
+	pagep = node->page + (off >> PAGE_CACHE_SHIFT);
+	off &= ~PAGE_CACHE_MASK;
+
+	l = min(len, (int)PAGE_CACHE_SIZE - off);
+	memcpy(buf, kmap(*pagep) + off, l);
+	kunmap(*pagep);
+
+	while ((len -= l) != 0) {
+		buf += l;
+		l = min(len, (int)PAGE_CACHE_SIZE);
+		memcpy(buf, kmap(*++pagep), l);
+		kunmap(*pagep);
+	}
+}
+
+u16 hfs_bnode_read_u16(struct hfs_bnode *node, int off)
+{
+	__be16 data;
+	// optimize later...
+	hfs_bnode_read(node, &data, off, 2);
+	return be16_to_cpu(data);
+}
+
+u8 hfs_bnode_read_u8(struct hfs_bnode *node, int off)
+{
+	u8 data;
+	// optimize later...
+	hfs_bnode_read(node, &data, off, 1);
+	return data;
+}
+
+void hfs_bnode_read_key(struct hfs_bnode *node, void *key, int off)
+{
+	struct hfs_btree *tree;
+	int key_len;
+
+	tree = node->tree;
+	if (node->type == HFS_NODE_LEAF ||
+	    tree->attributes & HFS_TREE_VARIDXKEYS)
+		key_len = hfs_bnode_read_u16(node, off) + 2;
+	else
+		key_len = tree->max_key_len + 2;
+
+	hfs_bnode_read(node, key, off, key_len);
+}
+
+void hfs_bnode_write(struct hfs_bnode *node, void *buf, int off, int len)
+{
+	struct page **pagep;
+	int l;
+
+	off += node->page_offset;
+	pagep = node->page + (off >> PAGE_CACHE_SHIFT);
+	off &= ~PAGE_CACHE_MASK;
+
+	l = min(len, (int)PAGE_CACHE_SIZE - off);
+	memcpy(kmap(*pagep) + off, buf, l);
+	set_page_dirty(*pagep);
+	kunmap(*pagep);
+
+	while ((len -= l) != 0) {
+		buf += l;
+		l = min(len, (int)PAGE_CACHE_SIZE);
+		memcpy(kmap(*++pagep), buf, l);
+		set_page_dirty(*pagep);
+		kunmap(*pagep);
+	}
+}
+
+void hfs_bnode_write_u16(struct hfs_bnode *node, int off, u16 data)
+{
+	__be16 v = cpu_to_be16(data);
+	// optimize later...
+	hfs_bnode_write(node, &v, off, 2);
+}
+
+void hfs_bnode_clear(struct hfs_bnode *node, int off, int len)
+{
+	struct page **pagep;
+	int l;
+
+	off += node->page_offset;
+	pagep = node->page + (off >> PAGE_CACHE_SHIFT);
+	off &= ~PAGE_CACHE_MASK;
+
+	l = min(len, (int)PAGE_CACHE_SIZE - off);
+	memset(kmap(*pagep) + off, 0, l);
+	set_page_dirty(*pagep);
+	kunmap(*pagep);
+
+	while ((len -= l) != 0) {
+		l = min(len, (int)PAGE_CACHE_SIZE);
+		memset(kmap(*++pagep), 0, l);
+		set_page_dirty(*pagep);
+		kunmap(*pagep);
+	}
+}
+
+void hfs_bnode_copy(struct hfs_bnode *dst_node, int dst,
+		    struct hfs_bnode *src_node, int src, int len)
+{
+	struct hfs_btree *tree;
+	struct page **src_page, **dst_page;
+	int l;
+
+	dprint(DBG_BNODE_MOD, "copybytes: %u,%u,%u\n", dst, src, len);
+	if (!len)
+		return;
+	tree = src_node->tree;
+	src += src_node->page_offset;
+	dst += dst_node->page_offset;
+	src_page = src_node->page + (src >> PAGE_CACHE_SHIFT);
+	src &= ~PAGE_CACHE_MASK;
+	dst_page = dst_node->page + (dst >> PAGE_CACHE_SHIFT);
+	dst &= ~PAGE_CACHE_MASK;
+
+	if (src == dst) {
+		l = min(len, (int)PAGE_CACHE_SIZE - src);
+		memcpy(kmap(*dst_page) + src, kmap(*src_page) + src, l);
+		kunmap(*src_page);
+		set_page_dirty(*dst_page);
+		kunmap(*dst_page);
+
+		while ((len -= l) != 0) {
+			l = min(len, (int)PAGE_CACHE_SIZE);
+			memcpy(kmap(*++dst_page), kmap(*++src_page), l);
+			kunmap(*src_page);
+			set_page_dirty(*dst_page);
+			kunmap(*dst_page);
+		}
+	} else {
+		void *src_ptr, *dst_ptr;
+
+		do {
+			src_ptr = kmap(*src_page) + src;
+			dst_ptr = kmap(*dst_page) + dst;
+			if (PAGE_CACHE_SIZE - src < PAGE_CACHE_SIZE - dst) {
+				l = PAGE_CACHE_SIZE - src;
+				src = 0;
+				dst += l;
+			} else {
+				l = PAGE_CACHE_SIZE - dst;
+				src += l;
+				dst = 0;
+			}
+			l = min(len, l);
+			memcpy(dst_ptr, src_ptr, l);
+			kunmap(*src_page);
+			set_page_dirty(*dst_page);
+			kunmap(*dst_page);
+			if (!dst)
+				dst_page++;
+			else
+				src_page++;
+		} while ((len -= l));
+	}
+}
+
+void hfs_bnode_move(struct hfs_bnode *node, int dst, int src, int len)
+{
+	struct page **src_page, **dst_page;
+	int l;
+
+	dprint(DBG_BNODE_MOD, "movebytes: %u,%u,%u\n", dst, src, len);
+	if (!len)
+		return;
+	src += node->page_offset;
+	dst += node->page_offset;
+	if (dst > src) {
+		src += len - 1;
+		src_page = node->page + (src >> PAGE_CACHE_SHIFT);
+		src = (src & ~PAGE_CACHE_MASK) + 1;
+		dst += len - 1;
+		dst_page = node->page + (dst >> PAGE_CACHE_SHIFT);
+		dst = (dst & ~PAGE_CACHE_MASK) + 1;
+
+		if (src == dst) {
+			while (src < len) {
+				memmove(kmap(*dst_page), kmap(*src_page), src);
+				kunmap(*src_page);
+				set_page_dirty(*dst_page);
+				kunmap(*dst_page);
+				len -= src;
+				src = PAGE_CACHE_SIZE;
+				src_page--;
+				dst_page--;
+			}
+			src -= len;
+			memmove(kmap(*dst_page) + src, kmap(*src_page) + src, len);
+			kunmap(*src_page);
+			set_page_dirty(*dst_page);
+			kunmap(*dst_page);
+		} else {
+			void *src_ptr, *dst_ptr;
+
+			do {
+				src_ptr = kmap(*src_page) + src;
+				dst_ptr = kmap(*dst_page) + dst;
+				if (src < dst) {
+					l = src;
+					src = PAGE_CACHE_SIZE;
+					dst -= l;
+				} else {
+					l = dst;
+					src -= l;
+					dst = PAGE_CACHE_SIZE;
+				}
+				l = min(len, l);
+				memmove(dst_ptr - l, src_ptr - l, l);
+				kunmap(*src_page);
+				set_page_dirty(*dst_page);
+				kunmap(*dst_page);
+				if (dst == PAGE_CACHE_SIZE)
+					dst_page--;
+				else
+					src_page--;
+			} while ((len -= l));
+		}
+	} else {
+		src_page = node->page + (src >> PAGE_CACHE_SHIFT);
+		src &= ~PAGE_CACHE_MASK;
+		dst_page = node->page + (dst >> PAGE_CACHE_SHIFT);
+		dst &= ~PAGE_CACHE_MASK;
+
+		if (src == dst) {
+			l = min(len, (int)PAGE_CACHE_SIZE - src);
+			memmove(kmap(*dst_page) + src, kmap(*src_page) + src, l);
+			kunmap(*src_page);
+			set_page_dirty(*dst_page);
+			kunmap(*dst_page);
+
+			while ((len -= l) != 0) {
+				l = min(len, (int)PAGE_CACHE_SIZE);
+				memmove(kmap(*++dst_page), kmap(*++src_page), l);
+				kunmap(*src_page);
+				set_page_dirty(*dst_page);
+				kunmap(*dst_page);
+			}
+		} else {
+			void *src_ptr, *dst_ptr;
+
+			do {
+				src_ptr = kmap(*src_page) + src;
+				dst_ptr = kmap(*dst_page) + dst;
+				if (PAGE_CACHE_SIZE - src < PAGE_CACHE_SIZE - dst) {
+					l = PAGE_CACHE_SIZE - src;
+					src = 0;
+					dst += l;
+				} else {
+					l = PAGE_CACHE_SIZE - dst;
+					src += l;
+					dst = 0;
+				}
+				l = min(len, l);
+				memmove(dst_ptr, src_ptr, l);
+				kunmap(*src_page);
+				set_page_dirty(*dst_page);
+				kunmap(*dst_page);
+				if (!dst)
+					dst_page++;
+				else
+					src_page++;
+			} while ((len -= l));
+		}
+	}
+}
+
+void hfs_bnode_dump(struct hfs_bnode *node)
+{
+	struct hfs_bnode_desc desc;
+	__be32 cnid;
+	int i, off, key_off;
+
+	dprint(DBG_BNODE_MOD, "bnode: %d\n", node->this);
+	hfs_bnode_read(node, &desc, 0, sizeof(desc));
+	dprint(DBG_BNODE_MOD, "%d, %d, %d, %d, %d\n",
+		be32_to_cpu(desc.next), be32_to_cpu(desc.prev),
+		desc.type, desc.height, be16_to_cpu(desc.num_recs));
+
+	off = node->tree->node_size - 2;
+	for (i = be16_to_cpu(desc.num_recs); i >= 0; off -= 2, i--) {
+		key_off = hfs_bnode_read_u16(node, off);
+		dprint(DBG_BNODE_MOD, " %d", key_off);
+		if (i && node->type == HFS_NODE_INDEX) {
+			int tmp;
+
+			if (node->tree->attributes & HFS_TREE_VARIDXKEYS)
+				tmp = hfs_bnode_read_u16(node, key_off) + 2;
+			else
+				tmp = node->tree->max_key_len + 2;
+			dprint(DBG_BNODE_MOD, " (%d", tmp);
+			hfs_bnode_read(node, &cnid, key_off + tmp, 4);
+			dprint(DBG_BNODE_MOD, ",%d)", be32_to_cpu(cnid));
+		} else if (i && node->type == HFS_NODE_LEAF) {
+			int tmp;
+
+			tmp = hfs_bnode_read_u16(node, key_off);
+			dprint(DBG_BNODE_MOD, " (%d)", tmp);
+		}
+	}
+	dprint(DBG_BNODE_MOD, "\n");
+}
+
+void hfs_bnode_unlink(struct hfs_bnode *node)
+{
+	struct hfs_btree *tree;
+	struct hfs_bnode *tmp;
+	__be32 cnid;
+
+	tree = node->tree;
+	if (node->prev) {
+		tmp = hfs_bnode_find(tree, node->prev);
+		if (IS_ERR(tmp))
+			return;
+		tmp->next = node->next;
+		cnid = cpu_to_be32(tmp->next);
+		hfs_bnode_write(tmp, &cnid, offsetof(struct hfs_bnode_desc, next), 4);
+		hfs_bnode_put(tmp);
+	} else if (node->type == HFS_NODE_LEAF)
+		tree->leaf_head = node->next;
+
+	if (node->next) {
+		tmp = hfs_bnode_find(tree, node->next);
+		if (IS_ERR(tmp))
+			return;
+		tmp->prev = node->prev;
+		cnid = cpu_to_be32(tmp->prev);
+		hfs_bnode_write(tmp, &cnid, offsetof(struct hfs_bnode_desc, prev), 4);
+		hfs_bnode_put(tmp);
+	} else if (node->type == HFS_NODE_LEAF)
+		tree->leaf_tail = node->prev;
+
+	// move down?
+	if (!node->prev && !node->next) {
+		printk("hfs_btree_del_level\n");
+	}
+	if (!node->parent) {
+		tree->root = 0;
+		tree->depth = 0;
+	}
+	set_bit(HFS_BNODE_DELETED, &node->flags);
+}
+
+static inline int hfs_bnode_hash(u32 num)
+{
+	num = (num >> 16) + num;
+	num += num >> 8;
+	return num & (NODE_HASH_SIZE - 1);
+}
+
+struct hfs_bnode *hfs_bnode_findhash(struct hfs_btree *tree, u32 cnid)
+{
+	struct hfs_bnode *node;
+
+	if (cnid >= tree->node_count) {
+		printk("HFS+-fs: request for non-existent node %d in B*Tree\n", cnid);
+		return NULL;
+	}
+
+	for (node = tree->node_hash[hfs_bnode_hash(cnid)];
+	     node; node = node->next_hash) {
+		if (node->this == cnid) {
+			return node;
+		}
+	}
+	return NULL;
+}
+
+static struct hfs_bnode *__hfs_bnode_create(struct hfs_btree *tree, u32 cnid)
+{
+	struct super_block *sb;
+	struct hfs_bnode *node, *node2;
+	struct address_space *mapping;
+	struct page *page;
+	int size, block, i, hash;
+	loff_t off;
+
+	if (cnid >= tree->node_count) {
+		printk("HFS+-fs: request for non-existent node %d in B*Tree\n", cnid);
+		return NULL;
+	}
+
+	sb = tree->inode->i_sb;
+	size = sizeof(struct hfs_bnode) + tree->pages_per_bnode *
+		sizeof(struct page *);
+	node = kmalloc(size, GFP_KERNEL);
+	if (!node)
+		return NULL;
+	memset(node, 0, size);
+	node->tree = tree;
+	node->this = cnid;
+	set_bit(HFS_BNODE_NEW, &node->flags);
+	atomic_set(&node->refcnt, 1);
+	dprint(DBG_BNODE_REFS, "new_node(%d:%d): 1\n",
+	       node->tree->cnid, node->this);
+	init_waitqueue_head(&node->lock_wq);
+	spin_lock(&tree->hash_lock);
+	node2 = hfs_bnode_findhash(tree, cnid);
+	if (!node2) {
+		hash = hfs_bnode_hash(cnid);
+		node->next_hash = tree->node_hash[hash];
+		tree->node_hash[hash] = node;
+		tree->node_hash_cnt++;
+	} else {
+		spin_unlock(&tree->hash_lock);
+		kfree(node);
+		wait_event(node2->lock_wq, !test_bit(HFS_BNODE_NEW, &node2->flags));
+		return node2;
+	}
+	spin_unlock(&tree->hash_lock);
+
+	mapping = tree->inode->i_mapping;
+	off = (loff_t)cnid << tree->node_size_shift;
+	block = off >> PAGE_CACHE_SHIFT;
+	node->page_offset = off & ~PAGE_CACHE_MASK;
+	for (i = 0; i < tree->pages_per_bnode; block++, i++) {
+		page = read_cache_page(mapping, block, (filler_t *)mapping->a_ops->readpage, NULL);
+		if (IS_ERR(page))
+			goto fail;
+		if (PageError(page)) {
+			page_cache_release(page);
+			goto fail;
+		}
+#if !REF_PAGES
+		page_cache_release(page);
+#endif
+		node->page[i] = page;
+	}
+
+	return node;
+fail:
+	set_bit(HFS_BNODE_ERROR, &node->flags);
+	return node;
+}
+
+void hfs_bnode_unhash(struct hfs_bnode *node)
+{
+	struct hfs_bnode **p;
+
+	dprint(DBG_BNODE_REFS, "remove_node(%d:%d): %d\n",
+		node->tree->cnid, node->this, atomic_read(&node->refcnt));
+	for (p = &node->tree->node_hash[hfs_bnode_hash(node->this)];
+	     *p && *p != node; p = &(*p)->next_hash)
+		;
+	if (!*p)
+		BUG();
+	*p = node->next_hash;
+	node->tree->node_hash_cnt--;
+}
+
+/* Load a particular node out of a tree */
+struct hfs_bnode *hfs_bnode_find(struct hfs_btree *tree, u32 num)
+{
+	struct hfs_bnode *node;
+	struct hfs_bnode_desc *desc;
+	int i, rec_off, off, next_off;
+	int entry_size, key_size;
+
+	spin_lock(&tree->hash_lock);
+	node = hfs_bnode_findhash(tree, num);
+	if (node) {
+		hfs_bnode_get(node);
+		spin_unlock(&tree->hash_lock);
+		wait_event(node->lock_wq, !test_bit(HFS_BNODE_NEW, &node->flags));
+		if (test_bit(HFS_BNODE_ERROR, &node->flags))
+			goto node_error;
+		return node;
+	}
+	spin_unlock(&tree->hash_lock);
+	node = __hfs_bnode_create(tree, num);
+	if (!node)
+		return ERR_PTR(-ENOMEM);
+	if (test_bit(HFS_BNODE_ERROR, &node->flags))
+		goto node_error;
+	if (!test_bit(HFS_BNODE_NEW, &node->flags))
+		return node;
+
+	desc = (struct hfs_bnode_desc *)(kmap(node->page[0]) + node->page_offset);
+	node->prev = be32_to_cpu(desc->prev);
+	node->next = be32_to_cpu(desc->next);
+	node->num_recs = be16_to_cpu(desc->num_recs);
+	node->type = desc->type;
+	node->height = desc->height;
+	kunmap(node->page[0]);
+
+	switch (node->type) {
+	case HFS_NODE_HEADER:
+	case HFS_NODE_MAP:
+		if (node->height != 0)
+			goto node_error;
+		break;
+	case HFS_NODE_LEAF:
+		if (node->height != 1)
+			goto node_error;
+		break;
+	case HFS_NODE_INDEX:
+		if (node->height <= 1 || node->height > tree->depth)
+			goto node_error;
+		break;
+	default:
+		goto node_error;
+	}
+
+	rec_off = tree->node_size - 2;
+	off = hfs_bnode_read_u16(node, rec_off);
+	if (off != sizeof(struct hfs_bnode_desc))
+		goto node_error;
+	for (i = 1; i <= node->num_recs; off = next_off, i++) {
+		rec_off -= 2;
+		next_off = hfs_bnode_read_u16(node, rec_off);
+		if (next_off <= off ||
+		    next_off > tree->node_size ||
+		    next_off & 1)
+			goto node_error;
+		entry_size = next_off - off;
+		if (node->type != HFS_NODE_INDEX &&
+		    node->type != HFS_NODE_LEAF)
+			continue;
+		key_size = hfs_bnode_read_u16(node, off) + 2;
+		if (key_size >= entry_size || key_size & 1)
+			goto node_error;
+	}
+	clear_bit(HFS_BNODE_NEW, &node->flags);
+	wake_up(&node->lock_wq);
+	return node;
+
+node_error:
+	set_bit(HFS_BNODE_ERROR, &node->flags);
+	clear_bit(HFS_BNODE_NEW, &node->flags);
+	wake_up(&node->lock_wq);
+	hfs_bnode_put(node);
+	return ERR_PTR(-EIO);
+}
+
+void hfs_bnode_free(struct hfs_bnode *node)
+{
+	//int i;
+
+	//for (i = 0; i < node->tree->pages_per_bnode; i++)
+	//	if (node->page[i])
+	//		page_cache_release(node->page[i]);
+	kfree(node);
+}
+
+struct hfs_bnode *hfs_bnode_create(struct hfs_btree *tree, u32 num)
+{
+	struct hfs_bnode *node;
+	struct page **pagep;
+	int i;
+
+	spin_lock(&tree->hash_lock);
+	node = hfs_bnode_findhash(tree, num);
+	spin_unlock(&tree->hash_lock);
+	if (node) {
+		printk("new node %u already hashed?\n", num);
+		BUG();
+	}
+	node = __hfs_bnode_create(tree, num);
+	if (!node)
+		return ERR_PTR(-ENOMEM);
+	if (test_bit(HFS_BNODE_ERROR, &node->flags)) {
+		hfs_bnode_put(node);
+		return ERR_PTR(-EIO);
+	}
+
+	pagep = node->page;
+	memset(kmap(*pagep) + node->page_offset, 0,
+	       min((int)PAGE_CACHE_SIZE, (int)tree->node_size));
+	set_page_dirty(*pagep);
+	kunmap(*pagep);
+	for (i = 1; i < tree->pages_per_bnode; i++) {
+		memset(kmap(*++pagep), 0, PAGE_CACHE_SIZE);
+		set_page_dirty(*pagep);
+		kunmap(*pagep);
+	}
+	clear_bit(HFS_BNODE_NEW, &node->flags);
+	wake_up(&node->lock_wq);
+
+	return node;
+}
+
+void hfs_bnode_get(struct hfs_bnode *node)
+{
+	if (node) {
+		atomic_inc(&node->refcnt);
+#if REF_PAGES
+		{
+		int i;
+		for (i = 0; i < node->tree->pages_per_bnode; i++)
+			get_page(node->page[i]);
+		}
+#endif
+		dprint(DBG_BNODE_REFS, "get_node(%d:%d): %d\n",
+		       node->tree->cnid, node->this, atomic_read(&node->refcnt));