1 files changed, 0 insertions, 475 deletions

diff --git a/ANDROID_3.4.5/fs/omfs/dir.c b/ANDROID_3.4.5/fs/omfs/dir.c
deleted file mode 100644
index f00576ec..00000000
--- a/ANDROID_3.4.5/fs/omfs/dir.c
+++ /dev/null
@@ -1,475 +0,0 @@
-/*
- * OMFS (as used by RIO Karma) directory operations.
- * Copyright (C) 2005 Bob Copeland <me@bobcopeland.com>
- * Released under GPL v2.
- */
-
-#include <linux/fs.h>
-#include <linux/ctype.h>
-#include <linux/buffer_head.h>
-#include "omfs.h"
-
-static int omfs_hash(const char *name, int namelen, int mod)
-{
-	int i, hash = 0;
-	for (i = 0; i < namelen; i++)
-		hash ^= tolower(name[i]) << (i % 24);
-	return hash % mod;
-}
-
-/*
- * Finds the bucket for a given name and reads the containing block;
- * *ofs is set to the offset of the first list entry.
- */
-static struct buffer_head *omfs_get_bucket(struct inode *dir,
-		const char *name, int namelen, int *ofs)
-{
-	int nbuckets = (dir->i_size - OMFS_DIR_START)/8;
-	int bucket = omfs_hash(name, namelen, nbuckets);
-
-	*ofs = OMFS_DIR_START + bucket * 8;
-	return omfs_bread(dir->i_sb, dir->i_ino);
-}
-
-static struct buffer_head *omfs_scan_list(struct inode *dir, u64 block,
-				const char *name, int namelen,
-				u64 *prev_block)
-{
-	struct buffer_head *bh;
-	struct omfs_inode *oi;
-	int err = -ENOENT;
-	*prev_block = ~0;
-
-	while (block != ~0) {
-		bh = omfs_bread(dir->i_sb, block);
-		if (!bh) {
-			err = -EIO;
-			goto err;
-		}
-
-		oi = (struct omfs_inode *) bh->b_data;
-		if (omfs_is_bad(OMFS_SB(dir->i_sb), &oi->i_head, block)) {
-			brelse(bh);
-			goto err;
-		}
-
-		if (strncmp(oi->i_name, name, namelen) == 0)
-			return bh;
-
-		*prev_block = block;
-		block = be64_to_cpu(oi->i_sibling);
-		brelse(bh);
-	}
-err:
-	return ERR_PTR(err);
-}
-
-static struct buffer_head *omfs_find_entry(struct inode *dir,
-					   const char *name, int namelen)
-{
-	struct buffer_head *bh;
-	int ofs;
-	u64 block, dummy;
-
-	bh = omfs_get_bucket(dir, name, namelen, &ofs);
-	if (!bh)
-		return ERR_PTR(-EIO);
-
-	block = be64_to_cpu(*((__be64 *) &bh->b_data[ofs]));
-	brelse(bh);
-
-	return omfs_scan_list(dir, block, name, namelen, &dummy);
-}
-
-int omfs_make_empty(struct inode *inode, struct super_block *sb)
-{
-	struct omfs_sb_info *sbi = OMFS_SB(sb);
-	struct buffer_head *bh;
-	struct omfs_inode *oi;
-
-	bh = omfs_bread(sb, inode->i_ino);
-	if (!bh)
-		return -ENOMEM;
-
-	memset(bh->b_data, 0, sizeof(struct omfs_inode));
-
-	if (S_ISDIR(inode->i_mode)) {
-		memset(&bh->b_data[OMFS_DIR_START], 0xff,
-			sbi->s_sys_blocksize - OMFS_DIR_START);
-	} else
-		omfs_make_empty_table(bh, OMFS_EXTENT_START);
-
-	oi = (struct omfs_inode *) bh->b_data;
-	oi->i_head.h_self = cpu_to_be64(inode->i_ino);
-	oi->i_sibling = ~cpu_to_be64(0ULL);
-
-	mark_buffer_dirty(bh);
-	brelse(bh);
-	return 0;
-}
-
-static int omfs_add_link(struct dentry *dentry, struct inode *inode)
-{
-	struct inode *dir = dentry->d_parent->d_inode;
-	const char *name = dentry->d_name.name;
-	int namelen = dentry->d_name.len;
-	struct omfs_inode *oi;
-	struct buffer_head *bh;
-	u64 block;
-	__be64 *entry;
-	int ofs;
-
-	/* just prepend to head of queue in proper bucket */
-	bh = omfs_get_bucket(dir, name, namelen, &ofs);
-	if (!bh)
-		goto out;
-
-	entry = (__be64 *) &bh->b_data[ofs];
-	block = be64_to_cpu(*entry);
-	*entry = cpu_to_be64(inode->i_ino);
-	mark_buffer_dirty(bh);
-	brelse(bh);
-
-	/* now set the sibling and parent pointers on the new inode */
-	bh = omfs_bread(dir->i_sb, inode->i_ino);
-	if (!bh)
-		goto out;
-
-	oi = (struct omfs_inode *) bh->b_data;
-	memcpy(oi->i_name, name, namelen);
-	memset(oi->i_name + namelen, 0, OMFS_NAMELEN - namelen);
-	oi->i_sibling = cpu_to_be64(block);
-	oi->i_parent = cpu_to_be64(dir->i_ino);
-	mark_buffer_dirty(bh);
-	brelse(bh);
-
-	dir->i_ctime = CURRENT_TIME_SEC;
-
-	/* mark affected inodes dirty to rebuild checksums */
-	mark_inode_dirty(dir);
-	mark_inode_dirty(inode);
-	return 0;
-out:
-	return -ENOMEM;
-}
-
-static int omfs_delete_entry(struct dentry *dentry)
-{
-	struct inode *dir = dentry->d_parent->d_inode;
-	struct inode *dirty;
-	const char *name = dentry->d_name.name;
-	int namelen = dentry->d_name.len;
-	struct omfs_inode *oi;
-	struct buffer_head *bh, *bh2;
-	__be64 *entry, next;
-	u64 block, prev;
-	int ofs;
-	int err = -ENOMEM;
-
-	/* delete the proper node in the bucket's linked list */
-	bh = omfs_get_bucket(dir, name, namelen, &ofs);
-	if (!bh)
-		goto out;
-
-	entry = (__be64 *) &bh->b_data[ofs];
-	block = be64_to_cpu(*entry);
-
-	bh2 = omfs_scan_list(dir, block, name, namelen, &prev);
-	if (IS_ERR(bh2)) {
-		err = PTR_ERR(bh2);
-		goto out_free_bh;
-	}
-
-	oi = (struct omfs_inode *) bh2->b_data;
-	next = oi->i_sibling;
-	brelse(bh2);
-
-	if (prev != ~0) {
-		/* found in middle of list, get list ptr */
-		brelse(bh);
-		bh = omfs_bread(dir->i_sb, prev);
-		if (!bh)
-			goto out;
-
-		oi = (struct omfs_inode *) bh->b_data;
-		entry = &oi->i_sibling;
-	}
-
-	*entry = next;
-	mark_buffer_dirty(bh);
-
-	if (prev != ~0) {
-		dirty = omfs_iget(dir->i_sb, prev);
-		if (!IS_ERR(dirty)) {
-			mark_inode_dirty(dirty);
-			iput(dirty);
-		}
-	}
-
-	err = 0;
-out_free_bh:
-	brelse(bh);
-out:
-	return err;
-}
-
-static int omfs_dir_is_empty(struct inode *inode)
-{
-	int nbuckets = (inode->i_size - OMFS_DIR_START) / 8;
-	struct buffer_head *bh;
-	u64 *ptr;
-	int i;
-
-	bh = omfs_bread(inode->i_sb, inode->i_ino);
-
-	if (!bh)
-		return 0;
-
-	ptr = (u64 *) &bh->b_data[OMFS_DIR_START];
-
-	for (i = 0; i < nbuckets; i++, ptr++)
-		if (*ptr != ~0)
-			break;
-
-	brelse(bh);
-	return *ptr != ~0;
-}
-
-static int omfs_remove(struct inode *dir, struct dentry *dentry)
-{
-	struct inode *inode = dentry->d_inode;
-	int ret;
-
-
-	if (S_ISDIR(inode->i_mode) &&
-	    !omfs_dir_is_empty(inode))
-		return -ENOTEMPTY;
-
-	ret = omfs_delete_entry(dentry);
-	if (ret)
-		return ret;
-	
-	clear_nlink(inode);
-	mark_inode_dirty(inode);
-	mark_inode_dirty(dir);
-	return 0;
-}
-
-static int omfs_add_node(struct inode *dir, struct dentry *dentry, umode_t mode)
-{
-	int err;
-	struct inode *inode = omfs_new_inode(dir, mode);
-
-	if (IS_ERR(inode))
-		return PTR_ERR(inode);
-
-	err = omfs_make_empty(inode, dir->i_sb);
-	if (err)
-		goto out_free_inode;
-
-	err = omfs_add_link(dentry, inode);
-	if (err)
-		goto out_free_inode;
-
-	d_instantiate(dentry, inode);
-	return 0;
-
-out_free_inode:
-	iput(inode);
-	return err;
-}
-
-static int omfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
-{
-	return omfs_add_node(dir, dentry, mode | S_IFDIR);
-}
-
-static int omfs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
-		struct nameidata *nd)
-{
-	return omfs_add_node(dir, dentry, mode | S_IFREG);
-}
-
-static struct dentry *omfs_lookup(struct inode *dir, struct dentry *dentry,
-				  struct nameidata *nd)
-{
-	struct buffer_head *bh;
-	struct inode *inode = NULL;
-
-	if (dentry->d_name.len > OMFS_NAMELEN)
-		return ERR_PTR(-ENAMETOOLONG);
-
-	bh = omfs_find_entry(dir, dentry->d_name.name, dentry->d_name.len);
-	if (!IS_ERR(bh)) {
-		struct omfs_inode *oi = (struct omfs_inode *)bh->b_data;
-		ino_t ino = be64_to_cpu(oi->i_head.h_self);
-		brelse(bh);
-		inode = omfs_iget(dir->i_sb, ino);
-		if (IS_ERR(inode))
-			return ERR_CAST(inode);
-	}
-	d_add(dentry, inode);
-	return NULL;
-}
-
-/* sanity check block's self pointer */
-int omfs_is_bad(struct omfs_sb_info *sbi, struct omfs_header *header,
-	u64 fsblock)
-{
-	int is_bad;
-	u64 ino = be64_to_cpu(header->h_self);
-	is_bad = ((ino != fsblock) || (ino < sbi->s_root_ino) ||
-		(ino > sbi->s_num_blocks));
-
-	if (is_bad)
-		printk(KERN_WARNING "omfs: bad hash chain detected\n");
-
-	return is_bad;
-}
-
-static int omfs_fill_chain(struct file *filp, void *dirent, filldir_t filldir,
-		u64 fsblock, int hindex)
-{
-	struct inode *dir = filp->f_dentry->d_inode;
-	struct buffer_head *bh;
-	struct omfs_inode *oi;
-	u64 self;
-	int res = 0;
-	unsigned char d_type;
-
-	/* follow chain in this bucket */
-	while (fsblock != ~0) {
-		bh = omfs_bread(dir->i_sb, fsblock);
-		if (!bh)
-			goto out;
-
-		oi = (struct omfs_inode *) bh->b_data;
-		if (omfs_is_bad(OMFS_SB(dir->i_sb), &oi->i_head, fsblock)) {
-			brelse(bh);
-			goto out;
-		}
-
-		self = fsblock;
-		fsblock = be64_to_cpu(oi->i_sibling);
-
-		/* skip visited nodes */
-		if (hindex) {
-			hindex--;
-			brelse(bh);
-			continue;
-		}
-
-		d_type = (oi->i_type == OMFS_DIR) ? DT_DIR : DT_REG;
-
-		res = filldir(dirent, oi->i_name, strnlen(oi->i_name,
-			OMFS_NAMELEN), filp->f_pos, self, d_type);
-		brelse(bh);
-		if (res < 0)
-			break;
-		filp->f_pos++;
-	}
-out:
-	return res;
-}
-
-static int omfs_rename(struct inode *old_dir, struct dentry *old_dentry,
-		struct inode *new_dir, struct dentry *new_dentry)
-{
-	struct inode *new_inode = new_dentry->d_inode;
-	struct inode *old_inode = old_dentry->d_inode;
-	int err;
-
-	if (new_inode) {
-		/* overwriting existing file/dir */
-		err = omfs_remove(new_dir, new_dentry);
-		if (err)
-			goto out;
-	}
-
-	/* since omfs locates files by name, we need to unlink _before_
-	 * adding the new link or we won't find the old one */
-	err = omfs_delete_entry(old_dentry);
-	if (err)
-		goto out;
-
-	mark_inode_dirty(old_dir);
-	err = omfs_add_link(new_dentry, old_inode);
-	if (err)
-		goto out;
-
-	old_inode->i_ctime = CURRENT_TIME_SEC;
-	mark_inode_dirty(old_inode);
-out:
-	return err;
-}
-
-static int omfs_readdir(struct file *filp, void *dirent, filldir_t filldir)
-{
-	struct inode *dir = filp->f_dentry->d_inode;
-	struct buffer_head *bh;
-	loff_t offset, res;
-	unsigned int hchain, hindex;
-	int nbuckets;
-	u64 fsblock;
-	int ret = -EINVAL;
-
-	if (filp->f_pos >> 32)
-		goto success;
-
-	switch ((unsigned long) filp->f_pos) {
-	case 0:
-		if (filldir(dirent, ".", 1, 0, dir->i_ino, DT_DIR) < 0)
-			goto success;
-		filp->f_pos++;
-		/* fall through */
-	case 1:
-		if (filldir(dirent, "..", 2, 1,
-		    parent_ino(filp->f_dentry), DT_DIR) < 0)
-			goto success;
-		filp->f_pos = 1 << 20;
-		/* fall through */
-	}
-
-	nbuckets = (dir->i_size - OMFS_DIR_START) / 8;
-
-	/* high 12 bits store bucket + 1 and low 20 bits store hash index */
-	hchain = (filp->f_pos >> 20) - 1;
-	hindex = filp->f_pos & 0xfffff;
-
-	bh = omfs_bread(dir->i_sb, dir->i_ino);
-	if (!bh)
-		goto out;
-
-	offset = OMFS_DIR_START + hchain * 8;
-
-	for (; hchain < nbuckets; hchain++, offset += 8) {
-		fsblock = be64_to_cpu(*((__be64 *) &bh->b_data[offset]));
-
-		res = omfs_fill_chain(filp, dirent, filldir, fsblock, hindex);
-		hindex = 0;
-		if (res < 0)
-			break;
-
-		filp->f_pos = (hchain+2) << 20;
-	}
-	brelse(bh);
-success:
-	ret = 0;
-out:
-	return ret;
-}
-
-const struct inode_operations omfs_dir_inops = {
-	.lookup = omfs_lookup,
-	.mkdir = omfs_mkdir,
-	.rename = omfs_rename,
-	.create = omfs_create,
-	.unlink = omfs_remove,
-	.rmdir = omfs_remove,
-};
-
-const struct file_operations omfs_dir_operations = {
-	.read = generic_read_dir,
-	.readdir = omfs_readdir,
-	.llseek = generic_file_llseek,
-};