Moved, renamed, and deleted files

The original directory structure was scattered and unorganized.
Changes are basically to make it look like kernel structure.

1 files changed, 0 insertions, 942 deletions

diff --git a/ANDROID_3.4.5/fs/affs/file.c b/ANDROID_3.4.5/fs/affs/file.c
deleted file mode 100644
index 2f4c935c..00000000
--- a/ANDROID_3.4.5/fs/affs/file.c
+++ /dev/null
@@ -1,942 +0,0 @@
-/*
- *  linux/fs/affs/file.c
- *
- *  (c) 1996  Hans-Joachim Widmaier - Rewritten
- *
- *  (C) 1993  Ray Burr - Modified for Amiga FFS filesystem.
- *
- *  (C) 1992  Eric Youngdale Modified for ISO 9660 filesystem.
- *
- *  (C) 1991  Linus Torvalds - minix filesystem
- *
- *  affs regular file handling primitives
- */
-
-#include "affs.h"
-
-#if PAGE_SIZE < 4096
-#error PAGE_SIZE must be at least 4096
-#endif
-
-static int affs_grow_extcache(struct inode *inode, u32 lc_idx);
-static struct buffer_head *affs_alloc_extblock(struct inode *inode, struct buffer_head *bh, u32 ext);
-static inline struct buffer_head *affs_get_extblock(struct inode *inode, u32 ext);
-static struct buffer_head *affs_get_extblock_slow(struct inode *inode, u32 ext);
-static int affs_file_open(struct inode *inode, struct file *filp);
-static int affs_file_release(struct inode *inode, struct file *filp);
-
-const struct file_operations affs_file_operations = {
-	.llseek		= generic_file_llseek,
-	.read		= do_sync_read,
-	.aio_read	= generic_file_aio_read,
-	.write		= do_sync_write,
-	.aio_write	= generic_file_aio_write,
-	.mmap		= generic_file_mmap,
-	.open		= affs_file_open,
-	.release	= affs_file_release,
-	.fsync		= affs_file_fsync,
-	.splice_read	= generic_file_splice_read,
-};
-
-const struct inode_operations affs_file_inode_operations = {
-	.truncate	= affs_truncate,
-	.setattr	= affs_notify_change,
-};
-
-static int
-affs_file_open(struct inode *inode, struct file *filp)
-{
-	pr_debug("AFFS: open(%lu,%d)\n",
-		 inode->i_ino, atomic_read(&AFFS_I(inode)->i_opencnt));
-	atomic_inc(&AFFS_I(inode)->i_opencnt);
-	return 0;
-}
-
-static int
-affs_file_release(struct inode *inode, struct file *filp)
-{
-	pr_debug("AFFS: release(%lu, %d)\n",
-		 inode->i_ino, atomic_read(&AFFS_I(inode)->i_opencnt));
-
-	if (atomic_dec_and_test(&AFFS_I(inode)->i_opencnt)) {
-		mutex_lock(&inode->i_mutex);
-		if (inode->i_size != AFFS_I(inode)->mmu_private)
-			affs_truncate(inode);
-		affs_free_prealloc(inode);
-		mutex_unlock(&inode->i_mutex);
-	}
-
-	return 0;
-}
-
-static int
-affs_grow_extcache(struct inode *inode, u32 lc_idx)
-{
-	struct super_block	*sb = inode->i_sb;
-	struct buffer_head	*bh;
-	u32 lc_max;
-	int i, j, key;
-
-	if (!AFFS_I(inode)->i_lc) {
-		char *ptr = (char *)get_zeroed_page(GFP_NOFS);
-		if (!ptr)
-			return -ENOMEM;
-		AFFS_I(inode)->i_lc = (u32 *)ptr;
-		AFFS_I(inode)->i_ac = (struct affs_ext_key *)(ptr + AFFS_CACHE_SIZE / 2);
-	}
-
-	lc_max = AFFS_LC_SIZE << AFFS_I(inode)->i_lc_shift;
-
-	if (AFFS_I(inode)->i_extcnt > lc_max) {
-		u32 lc_shift, lc_mask, tmp, off;
-
-		/* need to recalculate linear cache, start from old size */
-		lc_shift = AFFS_I(inode)->i_lc_shift;
-		tmp = (AFFS_I(inode)->i_extcnt / AFFS_LC_SIZE) >> lc_shift;
-		for (; tmp; tmp >>= 1)
-			lc_shift++;
-		lc_mask = (1 << lc_shift) - 1;
-
-		/* fix idx and old size to new shift */
-		lc_idx >>= (lc_shift - AFFS_I(inode)->i_lc_shift);
-		AFFS_I(inode)->i_lc_size >>= (lc_shift - AFFS_I(inode)->i_lc_shift);
-
-		/* first shrink old cache to make more space */
-		off = 1 << (lc_shift - AFFS_I(inode)->i_lc_shift);
-		for (i = 1, j = off; j < AFFS_LC_SIZE; i++, j += off)
-			AFFS_I(inode)->i_ac[i] = AFFS_I(inode)->i_ac[j];
-
-		AFFS_I(inode)->i_lc_shift = lc_shift;
-		AFFS_I(inode)->i_lc_mask = lc_mask;
-	}
-
-	/* fill cache to the needed index */
-	i = AFFS_I(inode)->i_lc_size;
-	AFFS_I(inode)->i_lc_size = lc_idx + 1;
-	for (; i <= lc_idx; i++) {
-		if (!i) {
-			AFFS_I(inode)->i_lc[0] = inode->i_ino;
-			continue;
-		}
-		key = AFFS_I(inode)->i_lc[i - 1];
-		j = AFFS_I(inode)->i_lc_mask + 1;
-		// unlock cache
-		for (; j > 0; j--) {
-			bh = affs_bread(sb, key);
-			if (!bh)
-				goto err;
-			key = be32_to_cpu(AFFS_TAIL(sb, bh)->extension);
-			affs_brelse(bh);
-		}
-		// lock cache
-		AFFS_I(inode)->i_lc[i] = key;
-	}
-
-	return 0;
-
-err:
-	// lock cache
-	return -EIO;
-}
-
-static struct buffer_head *
-affs_alloc_extblock(struct inode *inode, struct buffer_head *bh, u32 ext)
-{
-	struct super_block *sb = inode->i_sb;
-	struct buffer_head *new_bh;
-	u32 blocknr, tmp;
-
-	blocknr = affs_alloc_block(inode, bh->b_blocknr);
-	if (!blocknr)
-		return ERR_PTR(-ENOSPC);
-
-	new_bh = affs_getzeroblk(sb, blocknr);
-	if (!new_bh) {
-		affs_free_block(sb, blocknr);
-		return ERR_PTR(-EIO);
-	}
-
-	AFFS_HEAD(new_bh)->ptype = cpu_to_be32(T_LIST);
-	AFFS_HEAD(new_bh)->key = cpu_to_be32(blocknr);
-	AFFS_TAIL(sb, new_bh)->stype = cpu_to_be32(ST_FILE);
-	AFFS_TAIL(sb, new_bh)->parent = cpu_to_be32(inode->i_ino);
-	affs_fix_checksum(sb, new_bh);
-
-	mark_buffer_dirty_inode(new_bh, inode);
-
-	tmp = be32_to_cpu(AFFS_TAIL(sb, bh)->extension);
-	if (tmp)
-		affs_warning(sb, "alloc_ext", "previous extension set (%x)", tmp);
-	AFFS_TAIL(sb, bh)->extension = cpu_to_be32(blocknr);
-	affs_adjust_checksum(bh, blocknr - tmp);
-	mark_buffer_dirty_inode(bh, inode);
-
-	AFFS_I(inode)->i_extcnt++;
-	mark_inode_dirty(inode);
-
-	return new_bh;
-}
-
-static inline struct buffer_head *
-affs_get_extblock(struct inode *inode, u32 ext)
-{
-	/* inline the simplest case: same extended block as last time */
-	struct buffer_head *bh = AFFS_I(inode)->i_ext_bh;
-	if (ext == AFFS_I(inode)->i_ext_last)
-		get_bh(bh);
-	else
-		/* we have to do more (not inlined) */
-		bh = affs_get_extblock_slow(inode, ext);
-
-	return bh;
-}
-
-static struct buffer_head *
-affs_get_extblock_slow(struct inode *inode, u32 ext)
-{
-	struct super_block *sb = inode->i_sb;
-	struct buffer_head *bh;
-	u32 ext_key;
-	u32 lc_idx, lc_off, ac_idx;
-	u32 tmp, idx;
-
-	if (ext == AFFS_I(inode)->i_ext_last + 1) {
-		/* read the next extended block from the current one */
-		bh = AFFS_I(inode)->i_ext_bh;
-		ext_key = be32_to_cpu(AFFS_TAIL(sb, bh)->extension);
-		if (ext < AFFS_I(inode)->i_extcnt)
-			goto read_ext;
-		if (ext > AFFS_I(inode)->i_extcnt)
-			BUG();
-		bh = affs_alloc_extblock(inode, bh, ext);
-		if (IS_ERR(bh))
-			return bh;
-		goto store_ext;
-	}
-
-	if (ext == 0) {
-		/* we seek back to the file header block */
-		ext_key = inode->i_ino;
-		goto read_ext;
-	}
-
-	if (ext >= AFFS_I(inode)->i_extcnt) {
-		struct buffer_head *prev_bh;
-
-		/* allocate a new extended block */
-		if (ext > AFFS_I(inode)->i_extcnt)
-			BUG();
-
-		/* get previous extended block */
-		prev_bh = affs_get_extblock(inode, ext - 1);
-		if (IS_ERR(prev_bh))
-			return prev_bh;
-		bh = affs_alloc_extblock(inode, prev_bh, ext);
-		affs_brelse(prev_bh);
-		if (IS_ERR(bh))
-			return bh;
-		goto store_ext;
-	}
-
-again:
-	/* check if there is an extended cache and whether it's large enough */
-	lc_idx = ext >> AFFS_I(inode)->i_lc_shift;
-	lc_off = ext & AFFS_I(inode)->i_lc_mask;
-
-	if (lc_idx >= AFFS_I(inode)->i_lc_size) {
-		int err;
-
-		err = affs_grow_extcache(inode, lc_idx);
-		if (err)
-			return ERR_PTR(err);
-		goto again;
-	}
-
-	/* every n'th key we find in the linear cache */
-	if (!lc_off) {
-		ext_key = AFFS_I(inode)->i_lc[lc_idx];
-		goto read_ext;
-	}
-
-	/* maybe it's still in the associative cache */
-	ac_idx = (ext - lc_idx - 1) & AFFS_AC_MASK;
-	if (AFFS_I(inode)->i_ac[ac_idx].ext == ext) {
-		ext_key = AFFS_I(inode)->i_ac[ac_idx].key;
-		goto read_ext;
-	}
-
-	/* try to find one of the previous extended blocks */
-	tmp = ext;
-	idx = ac_idx;
-	while (--tmp, --lc_off > 0) {
-		idx = (idx - 1) & AFFS_AC_MASK;
-		if (AFFS_I(inode)->i_ac[idx].ext == tmp) {
-			ext_key = AFFS_I(inode)->i_ac[idx].key;
-			goto find_ext;
-		}
-	}
-
-	/* fall back to the linear cache */
-	ext_key = AFFS_I(inode)->i_lc[lc_idx];
-find_ext:
-	/* read all extended blocks until we find the one we need */
-	//unlock cache
-	do {
-		bh = affs_bread(sb, ext_key);
-		if (!bh)
-			goto err_bread;
-		ext_key = be32_to_cpu(AFFS_TAIL(sb, bh)->extension);
-		affs_brelse(bh);
-		tmp++;
-	} while (tmp < ext);
-	//lock cache
-
-	/* store it in the associative cache */
-	// recalculate ac_idx?
-	AFFS_I(inode)->i_ac[ac_idx].ext = ext;
-	AFFS_I(inode)->i_ac[ac_idx].key = ext_key;
-
-read_ext:
-	/* finally read the right extended block */
-	//unlock cache
-	bh = affs_bread(sb, ext_key);
-	if (!bh)
-		goto err_bread;
-	//lock cache
-
-store_ext:
-	/* release old cached extended block and store the new one */
-	affs_brelse(AFFS_I(inode)->i_ext_bh);
-	AFFS_I(inode)->i_ext_last = ext;
-	AFFS_I(inode)->i_ext_bh = bh;
-	get_bh(bh);
-
-	return bh;
-
-err_bread:
-	affs_brelse(bh);
-	return ERR_PTR(-EIO);
-}
-
-static int
-affs_get_block(struct inode *inode, sector_t block, struct buffer_head *bh_result, int create)
-{
-	struct super_block	*sb = inode->i_sb;
-	struct buffer_head	*ext_bh;
-	u32			 ext;
-
-	pr_debug("AFFS: get_block(%u, %lu)\n", (u32)inode->i_ino, (unsigned long)block);
-
-	BUG_ON(block > (sector_t)0x7fffffffUL);
-
-	if (block >= AFFS_I(inode)->i_blkcnt) {
-		if (block > AFFS_I(inode)->i_blkcnt || !create)
-			goto err_big;
-	} else
-		create = 0;
-
-	//lock cache
-	affs_lock_ext(inode);
-
-	ext = (u32)block / AFFS_SB(sb)->s_hashsize;
-	block -= ext * AFFS_SB(sb)->s_hashsize;
-	ext_bh = affs_get_extblock(inode, ext);
-	if (IS_ERR(ext_bh))
-		goto err_ext;
-	map_bh(bh_result, sb, (sector_t)be32_to_cpu(AFFS_BLOCK(sb, ext_bh, block)));
-
-	if (create) {
-		u32 blocknr = affs_alloc_block(inode, ext_bh->b_blocknr);
-		if (!blocknr)
-			goto err_alloc;
-		set_buffer_new(bh_result);
-		AFFS_I(inode)->mmu_private += AFFS_SB(sb)->s_data_blksize;
-		AFFS_I(inode)->i_blkcnt++;
-
-		/* store new block */
-		if (bh_result->b_blocknr)
-			affs_warning(sb, "get_block", "block already set (%x)", bh_result->b_blocknr);
-		AFFS_BLOCK(sb, ext_bh, block) = cpu_to_be32(blocknr);
-		AFFS_HEAD(ext_bh)->block_count = cpu_to_be32(block + 1);
-		affs_adjust_checksum(ext_bh, blocknr - bh_result->b_blocknr + 1);
-		bh_result->b_blocknr = blocknr;
-
-		if (!block) {
-			/* insert first block into header block */
-			u32 tmp = be32_to_cpu(AFFS_HEAD(ext_bh)->first_data);
-			if (tmp)
-				affs_warning(sb, "get_block", "first block already set (%d)", tmp);
-			AFFS_HEAD(ext_bh)->first_data = cpu_to_be32(blocknr);
-			affs_adjust_checksum(ext_bh, blocknr - tmp);
-		}
-	}
-
-	affs_brelse(ext_bh);
-	//unlock cache
-	affs_unlock_ext(inode);
-	return 0;
-
-err_big:
-	affs_error(inode->i_sb,"get_block","strange block request %d", block);
-	return -EIO;
-err_ext:
-	// unlock cache
-	affs_unlock_ext(inode);
-	return PTR_ERR(ext_bh);
-err_alloc:
-	brelse(ext_bh);
-	clear_buffer_mapped(bh_result);
-	bh_result->b_bdev = NULL;
-	// unlock cache
-	affs_unlock_ext(inode);
-	return -ENOSPC;
-}
-
-static int affs_writepage(struct page *page, struct writeback_control *wbc)
-{
-	return block_write_full_page(page, affs_get_block, wbc);
-}
-
-static int affs_readpage(struct file *file, struct page *page)
-{
-	return block_read_full_page(page, affs_get_block);
-}
-
-static int affs_write_begin(struct file *file, struct address_space *mapping,
-			loff_t pos, unsigned len, unsigned flags,
-			struct page **pagep, void **fsdata)
-{
-	int ret;
-
-	*pagep = NULL;
-	ret = cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
-				affs_get_block,
-				&AFFS_I(mapping->host)->mmu_private);
-	if (unlikely(ret)) {
-		loff_t isize = mapping->host->i_size;
-		if (pos + len > isize)
-			vmtruncate(mapping->host, isize);
-	}
-
-	return ret;
-}
-
-static sector_t _affs_bmap(struct address_space *mapping, sector_t block)
-{
-	return generic_block_bmap(mapping,block,affs_get_block);
-}
-
-const struct address_space_operations affs_aops = {
-	.readpage = affs_readpage,
-	.writepage = affs_writepage,
-	.write_begin = affs_write_begin,
-	.write_end = generic_write_end,
-	.bmap = _affs_bmap
-};
-
-static inline struct buffer_head *
-affs_bread_ino(struct inode *inode, int block, int create)
-{
-	struct buffer_head *bh, tmp_bh;
-	int err;
-
-	tmp_bh.b_state = 0;
-	err = affs_get_block(inode, block, &tmp_bh, create);
-	if (!err) {
-		bh = affs_bread(inode->i_sb, tmp_bh.b_blocknr);
-		if (bh) {
-			bh->b_state |= tmp_bh.b_state;
-			return bh;
-		}
-		err = -EIO;
-	}
-	return ERR_PTR(err);
-}
-
-static inline struct buffer_head *
-affs_getzeroblk_ino(struct inode *inode, int block)
-{
-	struct buffer_head *bh, tmp_bh;
-	int err;
-
-	tmp_bh.b_state = 0;
-	err = affs_get_block(inode, block, &tmp_bh, 1);
-	if (!err) {
-		bh = affs_getzeroblk(inode->i_sb, tmp_bh.b_blocknr);
-		if (bh) {
-			bh->b_state |= tmp_bh.b_state;
-			return bh;
-		}
-		err = -EIO;
-	}
-	return ERR_PTR(err);
-}
-
-static inline struct buffer_head *
-affs_getemptyblk_ino(struct inode *inode, int block)
-{
-	struct buffer_head *bh, tmp_bh;
-	int err;
-
-	tmp_bh.b_state = 0;
-	err = affs_get_block(inode, block, &tmp_bh, 1);
-	if (!err) {
-		bh = affs_getemptyblk(inode->i_sb, tmp_bh.b_blocknr);
-		if (bh) {
-			bh->b_state |= tmp_bh.b_state;
-			return bh;
-		}
-		err = -EIO;
-	}
-	return ERR_PTR(err);
-}
-
-static int
-affs_do_readpage_ofs(struct file *file, struct page *page, unsigned from, unsigned to)
-{
-	struct inode *inode = page->mapping->host;
-	struct super_block *sb = inode->i_sb;
-	struct buffer_head *bh;
-	char *data;
-	u32 bidx, boff, bsize;
-	u32 tmp;
-
-	pr_debug("AFFS: read_page(%u, %ld, %d, %d)\n", (u32)inode->i_ino, page->index, from, to);
-	BUG_ON(from > to || to > PAGE_CACHE_SIZE);
-	kmap(page);
-	data = page_address(page);
-	bsize = AFFS_SB(sb)->s_data_blksize;
-	tmp = (page->index << PAGE_CACHE_SHIFT) + from;
-	bidx = tmp / bsize;
-	boff = tmp % bsize;
-
-	while (from < to) {
-		bh = affs_bread_ino(inode, bidx, 0);
-		if (IS_ERR(bh))
-			return PTR_ERR(bh);
-		tmp = min(bsize - boff, to - from);
-		BUG_ON(from + tmp > to || tmp > bsize);
-		memcpy(data + from, AFFS_DATA(bh) + boff, tmp);
-		affs_brelse(bh);
-		bidx++;
-		from += tmp;
-		boff = 0;
-	}
-	flush_dcache_page(page);
-	kunmap(page);
-	return 0;
-}
-
-static int
-affs_extent_file_ofs(struct inode *inode, u32 newsize)
-{
-	struct super_block *sb = inode->i_sb;
-	struct buffer_head *bh, *prev_bh;
-	u32 bidx, boff;
-	u32 size, bsize;
-	u32 tmp;
-
-	pr_debug("AFFS: extent_file(%u, %d)\n", (u32)inode->i_ino, newsize);
-	bsize = AFFS_SB(sb)->s_data_blksize;
-	bh = NULL;
-	size = AFFS_I(inode)->mmu_private;
-	bidx = size / bsize;
-	boff = size % bsize;
-	if (boff) {
-		bh = affs_bread_ino(inode, bidx, 0);
-		if (IS_ERR(bh))
-			return PTR_ERR(bh);
-		tmp = min(bsize - boff, newsize - size);
-		BUG_ON(boff + tmp > bsize || tmp > bsize);
-		memset(AFFS_DATA(bh) + boff, 0, tmp);
-		be32_add_cpu(&AFFS_DATA_HEAD(bh)->size, tmp);
-		affs_fix_checksum(sb, bh);
-		mark_buffer_dirty_inode(bh, inode);
-		size += tmp;
-		bidx++;
-	} else if (bidx) {
-		bh = affs_bread_ino(inode, bidx - 1, 0);
-		if (IS_ERR(bh))
-			return PTR_ERR(bh);
-	}
-
-	while (size < newsize) {
-		prev_bh = bh;
-		bh = affs_getzeroblk_ino(inode, bidx);
-		if (IS_ERR(bh))
-			goto out;
-		tmp = min(bsize, newsize - size);
-		BUG_ON(tmp > bsize);
-		AFFS_DATA_HEAD(bh)->ptype = cpu_to_be32(T_DATA);
-		AFFS_DATA_HEAD(bh)->key = cpu_to_be32(inode->i_ino);
-		AFFS_DATA_HEAD(bh)->sequence = cpu_to_be32(bidx);
-		AFFS_DATA_HEAD(bh)->size = cpu_to_be32(tmp);
-		affs_fix_checksum(sb, bh);
-		bh->b_state &= ~(1UL << BH_New);
-		mark_buffer_dirty_inode(bh, inode);
-		if (prev_bh) {
-			u32 tmp = be32_to_cpu(AFFS_DATA_HEAD(prev_bh)->next);
-			if (tmp)
-				affs_warning(sb, "extent_file_ofs", "next block already set for %d (%d)", bidx, tmp);
-			AFFS_DATA_HEAD(prev_bh)->next = cpu_to_be32(bh->b_blocknr);
-			affs_adjust_checksum(prev_bh, bh->b_blocknr - tmp);
-			mark_buffer_dirty_inode(prev_bh, inode);
-			affs_brelse(prev_bh);
-		}
-		size += bsize;
-		bidx++;
-	}
-	affs_brelse(bh);
-	inode->i_size = AFFS_I(inode)->mmu_private = newsize;
-	return 0;
-
-out:
-	inode->i_size = AFFS_I(inode)->mmu_private = newsize;
-	return PTR_ERR(bh);
-}
-
-static int
-affs_readpage_ofs(struct file *file, struct page *page)
-{
-	struct inode *inode = page->mapping->host;
-	u32 to;
-	int err;
-
-	pr_debug("AFFS: read_page(%u, %ld)\n", (u32)inode->i_ino, page->index);
-	to = PAGE_CACHE_SIZE;
-	if (((page->index + 1) << PAGE_CACHE_SHIFT) > inode->i_size) {
-		to = inode->i_size & ~PAGE_CACHE_MASK;
-		memset(page_address(page) + to, 0, PAGE_CACHE_SIZE - to);
-	}
-
-	err = affs_do_readpage_ofs(file, page, 0, to);
-	if (!err)
-		SetPageUptodate(page);
-	unlock_page(page);
-	return err;
-}
-
-static int affs_write_begin_ofs(struct file *file, struct address_space *mapping,
-				loff_t pos, unsigned len, unsigned flags,
-				struct page **pagep, void **fsdata)
-{
-	struct inode *inode = mapping->host;
-	struct page *page;
-	pgoff_t index;
-	int err = 0;
-
-	pr_debug("AFFS: write_begin(%u, %llu, %llu)\n", (u32)inode->i_ino, (unsigned long long)pos, (unsigned long long)pos + len);
-	if (pos > AFFS_I(inode)->mmu_private) {
-		/* XXX: this probably leaves a too-big i_size in case of
-		 * failure. Should really be updating i_size at write_end time
-		 */
-		err = affs_extent_file_ofs(inode, pos);
-		if (err)
-			return err;
-	}
-
-	index = pos >> PAGE_CACHE_SHIFT;
-	page = grab_cache_page_write_begin(mapping, index, flags);
-	if (!page)
-		return -ENOMEM;
-	*pagep = page;
-
-	if (PageUptodate(page))
-		return 0;
-
-	/* XXX: inefficient but safe in the face of short writes */
-	err = affs_do_readpage_ofs(file, page, 0, PAGE_CACHE_SIZE);
-	if (err) {
-		unlock_page(page);
-		page_cache_release(page);
-	}
-	return err;
-}
-
-static int affs_write_end_ofs(struct file *file, struct address_space *mapping,
-				loff_t pos, unsigned len, unsigned copied,
-				struct page *page, void *fsdata)
-{
-	struct inode *inode = mapping->host;
-	struct super_block *sb = inode->i_sb;
-	struct buffer_head *bh, *prev_bh;
-	char *data;
-	u32 bidx, boff, bsize;
-	unsigned from, to;
-	u32 tmp;
-	int written;
-
-	from = pos & (PAGE_CACHE_SIZE - 1);
-	to = pos + len;
-	/*
-	 * XXX: not sure if this can handle short copies (len < copied), but
-	 * we don't have to, because the page should always be uptodate here,
-	 * due to write_begin.
-	 */
-
-	pr_debug("AFFS: write_begin(%u, %llu, %llu)\n", (u32)inode->i_ino, (unsigned long long)pos, (unsigned long long)pos + len);
-	bsize = AFFS_SB(sb)->s_data_blksize;
-	data = page_address(page);
-
-	bh = NULL;
-	written = 0;
-	tmp = (page->index << PAGE_CACHE_SHIFT) + from;
-	bidx = tmp / bsize;
-	boff = tmp % bsize;
-	if (boff) {
-		bh = affs_bread_ino(inode, bidx, 0);
-		if (IS_ERR(bh))
-			return PTR_ERR(bh);
-		tmp = min(bsize - boff, to - from);
-		BUG_ON(boff + tmp > bsize || tmp > bsize);
-		memcpy(AFFS_DATA(bh) + boff, data + from, tmp);
-		be32_add_cpu(&AFFS_DATA_HEAD(bh)->size, tmp);
-		affs_fix_checksum(sb, bh);
-		mark_buffer_dirty_inode(bh, inode);
-		written += tmp;
-		from += tmp;
-		bidx++;
-	} else if (bidx) {
-		bh = affs_bread_ino(inode, bidx - 1, 0);
-		if (IS_ERR(bh))
-			return PTR_ERR(bh);
-	}
-	while (from + bsize <= to) {
-		prev_bh = bh;
-		bh = affs_getemptyblk_ino(inode, bidx);
-		if (IS_ERR(bh))
-			goto out;
-		memcpy(AFFS_DATA(bh), data + from, bsize);
-		if (buffer_new(bh)) {
-			AFFS_DATA_HEAD(bh)->ptype = cpu_to_be32(T_DATA);
-			AFFS_DATA_HEAD(bh)->key = cpu_to_be32(inode->i_ino);
-			AFFS_DATA_HEAD(bh)->sequence = cpu_to_be32(bidx);
-			AFFS_DATA_HEAD(bh)->size = cpu_to_be32(bsize);
-			AFFS_DATA_HEAD(bh)->next = 0;
-			bh->b_state &= ~(1UL << BH_New);
-			if (prev_bh) {
-				u32 tmp = be32_to_cpu(AFFS_DATA_HEAD(prev_bh)->next);
-				if (tmp)
-					affs_warning(sb, "commit_write_ofs", "next block already set for %d (%d)", bidx, tmp);
-				AFFS_DATA_HEAD(prev_bh)->next = cpu_to_be32(bh->b_blocknr);
-				affs_adjust_checksum(prev_bh, bh->b_blocknr - tmp);
-				mark_buffer_dirty_inode(prev_bh, inode);
-			}
-		}
-		affs_brelse(prev_bh);
-		affs_fix_checksum(sb, bh);
-		mark_buffer_dirty_inode(bh, inode);
-		written += bsize;
-		from += bsize;
-		bidx++;
-	}
-	if (from < to) {
-		prev_bh = bh;
-		bh = affs_bread_ino(inode, bidx, 1);
-		if (IS_ERR(bh))
-			goto out;
-		tmp = min(bsize, to - from);
-		BUG_ON(tmp > bsize);
-		memcpy(AFFS_DATA(bh), data + from, tmp);
-		if (buffer_new(bh)) {
-			AFFS_DATA_HEAD(bh)->ptype = cpu_to_be32(T_DATA);
-			AFFS_DATA_HEAD(bh)->key = cpu_to_be32(inode->i_ino);
-			AFFS_DATA_HEAD(bh)->sequence = cpu_to_be32(bidx);
-			AFFS_DATA_HEAD(bh)->size = cpu_to_be32(tmp);
-			AFFS_DATA_HEAD(bh)->next = 0;
-			bh->b_state &= ~(1UL << BH_New);
-			if (prev_bh) {
-				u32 tmp = be32_to_cpu(AFFS_DATA_HEAD(prev_bh)->next);
-				if (tmp)
-					affs_warning(sb, "commit_write_ofs", "next block already set for %d (%d)", bidx, tmp);
-				AFFS_DATA_HEAD(prev_bh)->next = cpu_to_be32(bh->b_blocknr);
-				affs_adjust_checksum(prev_bh, bh->b_blocknr - tmp);
-				mark_buffer_dirty_inode(prev_bh, inode);
-			}
-		} else if (be32_to_cpu(AFFS_DATA_HEAD(bh)->size) < tmp)
-			AFFS_DATA_HEAD(bh)->size = cpu_to_be32(tmp);
-		affs_brelse(prev_bh);
-		affs_fix_checksum(sb, bh);
-		mark_buffer_dirty_inode(bh, inode);
-		written += tmp;
-		from += tmp;
-		bidx++;
-	}
-	SetPageUptodate(page);
-
-done:
-	affs_brelse(bh);
-	tmp = (page->index << PAGE_CACHE_SHIFT) + from;
-	if (tmp > inode->i_size)
-		inode->i_size = AFFS_I(inode)->mmu_private = tmp;
-
-	unlock_page(page);
-	page_cache_release(page);
-
-	return written;
-
-out:
-	bh = prev_bh;
-	if (!written)
-		written = PTR_ERR(bh);
-	goto done;
-}
-
-const struct address_space_operations affs_aops_ofs = {
-	.readpage = affs_readpage_ofs,
-	//.writepage = affs_writepage_ofs,
-	.write_begin = affs_write_begin_ofs,
-	.write_end = affs_write_end_ofs
-};
-
-/* Free any preallocated blocks. */
-
-void
-affs_free_prealloc(struct inode *inode)
-{
-	struct super_block *sb = inode->i_sb;
-
-	pr_debug("AFFS: free_prealloc(ino=%lu)\n", inode->i_ino);
-
-	while (AFFS_I(inode)->i_pa_cnt) {
-		AFFS_I(inode)->i_pa_cnt--;
-		affs_free_block(sb, ++AFFS_I(inode)->i_lastalloc);
-	}
-}
-
-/* Truncate (or enlarge) a file to the requested size. */
-
-void
-affs_truncate(struct inode *inode)
-{
-	struct super_block *sb = inode->i_sb;
-	u32 ext, ext_key;
-	u32 last_blk, blkcnt, blk;
-	u32 size;
-	struct buffer_head *ext_bh;
-	int i;
-
-	pr_debug("AFFS: truncate(inode=%d, oldsize=%u, newsize=%u)\n",
-		 (u32)inode->i_ino, (u32)AFFS_I(inode)->mmu_private, (u32)inode->i_size);
-
-	last_blk = 0;
-	ext = 0;
-	if (inode->i_size) {
-		last_blk = ((u32)inode->i_size - 1) / AFFS_SB(sb)->s_data_blksize;
-		ext = last_blk / AFFS_SB(sb)->s_hashsize;
-	}
-
-	if (inode->i_size > AFFS_I(inode)->mmu_private) {
-		struct address_space *mapping = inode->i_mapping;
-		struct page *page;
-		void *fsdata;
-		u32 size = inode->i_size;
-		int res;
-
-		res = mapping->a_ops->write_begin(NULL, mapping, size, 0, 0, &page, &fsdata);
-		if (!res)
-			res = mapping->a_ops->write_end(NULL, mapping, size, 0, 0, page, fsdata);
-		else
-			inode->i_size = AFFS_I(inode)->mmu_private;
-		mark_inode_dirty(inode);
-		return;
-	} else if (inode->i_size == AFFS_I(inode)->mmu_private)
-		return;
-
-	// lock cache
-	ext_bh = affs_get_extblock(inode, ext);
-	if (IS_ERR(ext_bh)) {
-		affs_warning(sb, "truncate", "unexpected read error for ext block %u (%d)",
-			     ext, PTR_ERR(ext_bh));
-		return;
-	}
-	if (AFFS_I(inode)->i_lc) {
-		/* clear linear cache */
-		i = (ext + 1) >> AFFS_I(inode)->i_lc_shift;
-		if (AFFS_I(inode)->i_lc_size > i) {
-			AFFS_I(inode)->i_lc_size = i;
-			for (; i < AFFS_LC_SIZE; i++)
-				AFFS_I(inode)->i_lc[i] = 0;
-		}
-		/* clear associative cache */
-		for (i = 0; i < AFFS_AC_SIZE; i++)
-			if (AFFS_I(inode)->i_ac[i].ext >= ext)
-				AFFS_I(inode)->i_ac[i].ext = 0;
-	}
-	ext_key = be32_to_cpu(AFFS_TAIL(sb, ext_bh)->extension);
-
-	blkcnt = AFFS_I(inode)->i_blkcnt;
-	i = 0;
-	blk = last_blk;
-	if (inode->i_size) {
-		i = last_blk % AFFS_SB(sb)->s_hashsize + 1;
-		blk++;
-	} else
-		AFFS_HEAD(ext_bh)->first_data = 0;
-	AFFS_HEAD(ext_bh)->block_count = cpu_to_be32(i);
-	size = AFFS_SB(sb)->s_hashsize;
-	if (size > blkcnt - blk + i)
-		size = blkcnt - blk + i;
-	for (; i < size; i++, blk++) {
-		affs_free_block(sb, be32_to_cpu(AFFS_BLOCK(sb, ext_bh, i)));
-		AFFS_BLOCK(sb, ext_bh, i) = 0;
-	}
-	AFFS_TAIL(sb, ext_bh)->extension = 0;
-	affs_fix_checksum(sb, ext_bh);
-	mark_buffer_dirty_inode(ext_bh, inode);
-	affs_brelse(ext_bh);
-
-	if (inode->i_size) {
-		AFFS_I(inode)->i_blkcnt = last_blk + 1;
-		AFFS_I(inode)->i_extcnt = ext + 1;
-		if (AFFS_SB(sb)->s_flags & SF_OFS) {
-			struct buffer_head *bh = affs_bread_ino(inode, last_blk, 0);
-			u32 tmp;
-			if (IS_ERR(bh)) {
-				affs_warning(sb, "truncate", "unexpected read error for last block %u (%d)",
-					     ext, PTR_ERR(bh));
-				return;
-			}
-			tmp = be32_to_cpu(AFFS_DATA_HEAD(bh)->next);
-			AFFS_DATA_HEAD(bh)->next = 0;
-			affs_adjust_checksum(bh, -tmp);
-			affs_brelse(bh);
-		}
-	} else {
-		AFFS_I(inode)->i_blkcnt = 0;
-		AFFS_I(inode)->i_extcnt = 1;
-	}
-	AFFS_I(inode)->mmu_private = inode->i_size;
-	// unlock cache
-
-	while (ext_key) {
-		ext_bh = affs_bread(sb, ext_key);
-		size = AFFS_SB(sb)->s_hashsize;
-		if (size > blkcnt - blk)
-			size = blkcnt - blk;
-		for (i = 0; i < size; i++, blk++)
-			affs_free_block(sb, be32_to_cpu(AFFS_BLOCK(sb, ext_bh, i)));
-		affs_free_block(sb, ext_key);
-		ext_key = be32_to_cpu(AFFS_TAIL(sb, ext_bh)->extension);
-		affs_brelse(ext_bh);
-	}
-	affs_free_prealloc(inode);
-}
-
-int affs_file_fsync(struct file *filp, loff_t start, loff_t end, int datasync)
-{
-	struct inode *inode = filp->f_mapping->host;
-	int ret, err;
-
-	err = filemap_write_and_wait_range(inode->i_mapping, start, end);
-	if (err)
-		return err;
-
-	mutex_lock(&inode->i_mutex);
-	ret = write_inode_now(inode, 0);
-	err = sync_blockdev(inode->i_sb->s_bdev);
-	if (!ret)
-		ret = err;
-	mutex_unlock(&inode->i_mutex);
-	return ret;
-}