blob: 3e5ac30e8b6fa705ccbb09eaf980626217e1c7cb [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * fs/bfs/dir.c
3 * BFS directory operations.
4 * Copyright (C) 1999,2000 Tigran Aivazian <tigran@veritas.com>
Andrew Stribblehillfac92be2005-09-09 13:02:04 -07005 * Made endianness-clean by Andrew Stribblehill <ads@wompom.org> 2005
Linus Torvalds1da177e2005-04-16 15:20:36 -07006 */
7
8#include <linux/time.h>
9#include <linux/string.h>
10#include <linux/fs.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070011#include <linux/buffer_head.h>
12#include <linux/sched.h>
13#include "bfs.h"
14
15#undef DEBUG
16
17#ifdef DEBUG
18#define dprintf(x...) printf(x)
19#else
20#define dprintf(x...)
21#endif
22
Dmitri Vorobievf433dc52007-11-14 16:59:47 -080023static int bfs_add_entry(struct inode *dir, const unsigned char *name,
24 int namelen, int ino);
25static struct buffer_head *bfs_find_entry(struct inode *dir,
26 const unsigned char *name, int namelen,
27 struct bfs_dirent **res_dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -070028
Al Viro81b9f662013-05-16 13:41:48 -040029static int bfs_readdir(struct file *f, struct dir_context *ctx)
Linus Torvalds1da177e2005-04-16 15:20:36 -070030{
Al Viro496ad9a2013-01-23 17:07:38 -050031 struct inode *dir = file_inode(f);
Dmitri Vorobievf433dc52007-11-14 16:59:47 -080032 struct buffer_head *bh;
33 struct bfs_dirent *de;
Linus Torvalds1da177e2005-04-16 15:20:36 -070034 unsigned int offset;
35 int block;
36
Al Viro81b9f662013-05-16 13:41:48 -040037 if (ctx->pos & (BFS_DIRENT_SIZE - 1)) {
Dmitri Vorobievf433dc52007-11-14 16:59:47 -080038 printf("Bad f_pos=%08lx for %s:%08lx\n",
Al Viro81b9f662013-05-16 13:41:48 -040039 (unsigned long)ctx->pos,
Dmitri Vorobievf433dc52007-11-14 16:59:47 -080040 dir->i_sb->s_id, dir->i_ino);
Al Viro81b9f662013-05-16 13:41:48 -040041 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -070042 }
43
Al Viro81b9f662013-05-16 13:41:48 -040044 while (ctx->pos < dir->i_size) {
45 offset = ctx->pos & (BFS_BSIZE - 1);
46 block = BFS_I(dir)->i_sblock + (ctx->pos >> BFS_BSIZE_BITS);
Linus Torvalds1da177e2005-04-16 15:20:36 -070047 bh = sb_bread(dir->i_sb, block);
48 if (!bh) {
Al Viro81b9f662013-05-16 13:41:48 -040049 ctx->pos += BFS_BSIZE - offset;
Linus Torvalds1da177e2005-04-16 15:20:36 -070050 continue;
51 }
52 do {
53 de = (struct bfs_dirent *)(bh->b_data + offset);
54 if (de->ino) {
55 int size = strnlen(de->name, BFS_NAMELEN);
Al Viro81b9f662013-05-16 13:41:48 -040056 if (!dir_emit(ctx, de->name, size,
Dmitri Vorobievf433dc52007-11-14 16:59:47 -080057 le16_to_cpu(de->ino),
Al Viro81b9f662013-05-16 13:41:48 -040058 DT_UNKNOWN)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -070059 brelse(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -070060 return 0;
61 }
62 }
63 offset += BFS_DIRENT_SIZE;
Al Viro81b9f662013-05-16 13:41:48 -040064 ctx->pos += BFS_DIRENT_SIZE;
65 } while ((offset < BFS_BSIZE) && (ctx->pos < dir->i_size));
Linus Torvalds1da177e2005-04-16 15:20:36 -070066 brelse(bh);
67 }
Al Viro81b9f662013-05-16 13:41:48 -040068 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -070069}
70
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -080071const struct file_operations bfs_dir_operations = {
Linus Torvalds1da177e2005-04-16 15:20:36 -070072 .read = generic_read_dir,
Al Viroc51da202016-04-30 22:37:34 -040073 .iterate_shared = bfs_readdir,
Christoph Hellwig1b061d92010-05-26 17:53:41 +020074 .fsync = generic_file_fsync,
Christoph Hellwig3222a3e2008-09-03 21:53:01 +020075 .llseek = generic_file_llseek,
Linus Torvalds1da177e2005-04-16 15:20:36 -070076};
77
Al Viro4acdaf22011-07-26 01:42:34 -040078static int bfs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
Al Viroebfc3b42012-06-10 18:05:36 -040079 bool excl)
Linus Torvalds1da177e2005-04-16 15:20:36 -070080{
81 int err;
Dmitri Vorobievf433dc52007-11-14 16:59:47 -080082 struct inode *inode;
83 struct super_block *s = dir->i_sb;
84 struct bfs_sb_info *info = BFS_SB(s);
Linus Torvalds1da177e2005-04-16 15:20:36 -070085 unsigned long ino;
86
87 inode = new_inode(s);
88 if (!inode)
Sanidhya Kashyapc3fe5872015-04-16 12:48:32 -070089 return -ENOMEM;
Dmitri Vorobiev3f165e42008-07-25 19:44:54 -070090 mutex_lock(&info->bfs_lock);
Akinobu Mita69b195b2011-03-21 08:32:53 -040091 ino = find_first_zero_bit(info->si_imap, info->si_lasti + 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -070092 if (ino > info->si_lasti) {
Dmitri Vorobiev3f165e42008-07-25 19:44:54 -070093 mutex_unlock(&info->bfs_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -070094 iput(inode);
95 return -ENOSPC;
96 }
Dmitri Vorobievf433dc52007-11-14 16:59:47 -080097 set_bit(ino, info->si_imap);
Linus Torvalds1da177e2005-04-16 15:20:36 -070098 info->si_freei--;
Dmitry Monakhove6ecdc72010-03-04 17:31:46 +030099 inode_init_owner(inode, dir, mode);
Deepa Dinamani02027d42016-09-14 07:48:05 -0700100 inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode);
Theodore Ts'oba52de12006-09-27 01:50:49 -0700101 inode->i_blocks = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102 inode->i_op = &bfs_file_inops;
103 inode->i_fop = &bfs_file_operations;
104 inode->i_mapping->a_ops = &bfs_aops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105 inode->i_ino = ino;
Alexey Dobriyance0fe7e2005-10-04 17:43:06 +0100106 BFS_I(inode)->i_dsk_ino = ino;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107 BFS_I(inode)->i_sblock = 0;
108 BFS_I(inode)->i_eblock = 0;
109 insert_inode_hash(inode);
110 mark_inode_dirty(inode);
Fabian Frederick1da85fd2014-08-08 14:22:29 -0700111 bfs_dump_imap("create", s);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112
Dmitri Vorobievf433dc52007-11-14 16:59:47 -0800113 err = bfs_add_entry(dir, dentry->d_name.name, dentry->d_name.len,
114 inode->i_ino);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115 if (err) {
Dave Hansen9a53c3a2006-09-30 23:29:03 -0700116 inode_dec_link_count(inode);
Dmitri Vorobiev3f165e42008-07-25 19:44:54 -0700117 mutex_unlock(&info->bfs_lock);
Eric Sesterhenn15581822008-09-13 02:33:12 -0700118 iput(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119 return err;
120 }
Dmitri Vorobiev3f165e42008-07-25 19:44:54 -0700121 mutex_unlock(&info->bfs_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122 d_instantiate(dentry, inode);
123 return 0;
124}
125
Dmitri Vorobievf433dc52007-11-14 16:59:47 -0800126static struct dentry *bfs_lookup(struct inode *dir, struct dentry *dentry,
Al Viro00cd8dd2012-06-10 17:13:09 -0400127 unsigned int flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128{
Dmitri Vorobievf433dc52007-11-14 16:59:47 -0800129 struct inode *inode = NULL;
130 struct buffer_head *bh;
131 struct bfs_dirent *de;
Dmitri Vorobiev3f165e42008-07-25 19:44:54 -0700132 struct bfs_sb_info *info = BFS_SB(dir->i_sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133
134 if (dentry->d_name.len > BFS_NAMELEN)
135 return ERR_PTR(-ENAMETOOLONG);
136
Dmitri Vorobiev3f165e42008-07-25 19:44:54 -0700137 mutex_lock(&info->bfs_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138 bh = bfs_find_entry(dir, dentry->d_name.name, dentry->d_name.len, &de);
139 if (bh) {
Andrew Stribblehillfac92be2005-09-09 13:02:04 -0700140 unsigned long ino = (unsigned long)le16_to_cpu(de->ino);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141 brelse(bh);
David Howellse33ab082008-02-07 00:15:32 -0800142 inode = bfs_iget(dir->i_sb, ino);
143 if (IS_ERR(inode)) {
Dmitri Vorobiev3f165e42008-07-25 19:44:54 -0700144 mutex_unlock(&info->bfs_lock);
David Howellse33ab082008-02-07 00:15:32 -0800145 return ERR_CAST(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146 }
147 }
Dmitri Vorobiev3f165e42008-07-25 19:44:54 -0700148 mutex_unlock(&info->bfs_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149 d_add(dentry, inode);
150 return NULL;
151}
152
Dmitri Vorobievf433dc52007-11-14 16:59:47 -0800153static int bfs_link(struct dentry *old, struct inode *dir,
154 struct dentry *new)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155{
David Howells2b0143b2015-03-17 22:25:59 +0000156 struct inode *inode = d_inode(old);
Dmitri Vorobiev3f165e42008-07-25 19:44:54 -0700157 struct bfs_sb_info *info = BFS_SB(inode->i_sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158 int err;
159
Dmitri Vorobiev3f165e42008-07-25 19:44:54 -0700160 mutex_lock(&info->bfs_lock);
Dmitri Vorobievf433dc52007-11-14 16:59:47 -0800161 err = bfs_add_entry(dir, new->d_name.name, new->d_name.len,
162 inode->i_ino);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163 if (err) {
Dmitri Vorobiev3f165e42008-07-25 19:44:54 -0700164 mutex_unlock(&info->bfs_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165 return err;
166 }
Dave Hansend8c76e62006-09-30 23:29:04 -0700167 inc_nlink(inode);
Deepa Dinamani02027d42016-09-14 07:48:05 -0700168 inode->i_ctime = current_time(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169 mark_inode_dirty(inode);
Al Viro7de9c6ee2010-10-23 11:11:40 -0400170 ihold(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171 d_instantiate(new, inode);
Dmitri Vorobiev3f165e42008-07-25 19:44:54 -0700172 mutex_unlock(&info->bfs_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173 return 0;
174}
175
Dmitri Vorobievf433dc52007-11-14 16:59:47 -0800176static int bfs_unlink(struct inode *dir, struct dentry *dentry)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177{
178 int error = -ENOENT;
David Howells2b0143b2015-03-17 22:25:59 +0000179 struct inode *inode = d_inode(dentry);
Dmitri Vorobievf433dc52007-11-14 16:59:47 -0800180 struct buffer_head *bh;
181 struct bfs_dirent *de;
Dmitri Vorobiev3f165e42008-07-25 19:44:54 -0700182 struct bfs_sb_info *info = BFS_SB(inode->i_sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183
Dmitri Vorobiev3f165e42008-07-25 19:44:54 -0700184 mutex_lock(&info->bfs_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185 bh = bfs_find_entry(dir, dentry->d_name.name, dentry->d_name.len, &de);
Dmitri Vorobievf433dc52007-11-14 16:59:47 -0800186 if (!bh || (le16_to_cpu(de->ino) != inode->i_ino))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187 goto out_brelse;
188
189 if (!inode->i_nlink) {
Dmitri Vorobievf433dc52007-11-14 16:59:47 -0800190 printf("unlinking non-existent file %s:%lu (nlink=%d)\n",
191 inode->i_sb->s_id, inode->i_ino,
192 inode->i_nlink);
Miklos Szeredibfe86842011-10-28 14:13:29 +0200193 set_nlink(inode, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194 }
195 de->ino = 0;
Al Viro4427f0c2009-06-08 01:15:58 -0400196 mark_buffer_dirty_inode(bh, dir);
Deepa Dinamani02027d42016-09-14 07:48:05 -0700197 dir->i_ctime = dir->i_mtime = current_time(dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198 mark_inode_dirty(dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199 inode->i_ctime = dir->i_ctime;
Dave Hansen9a53c3a2006-09-30 23:29:03 -0700200 inode_dec_link_count(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201 error = 0;
202
203out_brelse:
204 brelse(bh);
Dmitri Vorobiev3f165e42008-07-25 19:44:54 -0700205 mutex_unlock(&info->bfs_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700206 return error;
207}
208
Dmitri Vorobievf433dc52007-11-14 16:59:47 -0800209static int bfs_rename(struct inode *old_dir, struct dentry *old_dentry,
Miklos Szeredif03b8ad2016-09-27 11:03:57 +0200210 struct inode *new_dir, struct dentry *new_dentry,
211 unsigned int flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212{
Dmitri Vorobievf433dc52007-11-14 16:59:47 -0800213 struct inode *old_inode, *new_inode;
214 struct buffer_head *old_bh, *new_bh;
215 struct bfs_dirent *old_de, *new_de;
Dmitri Vorobiev3f165e42008-07-25 19:44:54 -0700216 struct bfs_sb_info *info;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700217 int error = -ENOENT;
218
Miklos Szeredif03b8ad2016-09-27 11:03:57 +0200219 if (flags & ~RENAME_NOREPLACE)
220 return -EINVAL;
221
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222 old_bh = new_bh = NULL;
David Howells2b0143b2015-03-17 22:25:59 +0000223 old_inode = d_inode(old_dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224 if (S_ISDIR(old_inode->i_mode))
225 return -EINVAL;
226
Dmitri Vorobiev3f165e42008-07-25 19:44:54 -0700227 info = BFS_SB(old_inode->i_sb);
228
229 mutex_lock(&info->bfs_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230 old_bh = bfs_find_entry(old_dir,
231 old_dentry->d_name.name,
232 old_dentry->d_name.len, &old_de);
233
Dmitri Vorobievf433dc52007-11-14 16:59:47 -0800234 if (!old_bh || (le16_to_cpu(old_de->ino) != old_inode->i_ino))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235 goto end_rename;
236
237 error = -EPERM;
David Howells2b0143b2015-03-17 22:25:59 +0000238 new_inode = d_inode(new_dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239 new_bh = bfs_find_entry(new_dir,
240 new_dentry->d_name.name,
241 new_dentry->d_name.len, &new_de);
242
243 if (new_bh && !new_inode) {
244 brelse(new_bh);
245 new_bh = NULL;
246 }
247 if (!new_bh) {
248 error = bfs_add_entry(new_dir,
249 new_dentry->d_name.name,
Dmitri Vorobievf433dc52007-11-14 16:59:47 -0800250 new_dentry->d_name.len,
251 old_inode->i_ino);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700252 if (error)
253 goto end_rename;
254 }
255 old_de->ino = 0;
Deepa Dinamani02027d42016-09-14 07:48:05 -0700256 old_dir->i_ctime = old_dir->i_mtime = current_time(old_dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257 mark_inode_dirty(old_dir);
258 if (new_inode) {
Deepa Dinamani02027d42016-09-14 07:48:05 -0700259 new_inode->i_ctime = current_time(new_inode);
Dave Hansen9a53c3a2006-09-30 23:29:03 -0700260 inode_dec_link_count(new_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261 }
Al Viro4427f0c2009-06-08 01:15:58 -0400262 mark_buffer_dirty_inode(old_bh, old_dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263 error = 0;
264
265end_rename:
Dmitri Vorobiev3f165e42008-07-25 19:44:54 -0700266 mutex_unlock(&info->bfs_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700267 brelse(old_bh);
268 brelse(new_bh);
269 return error;
270}
271
Arjan van de Ven754661f2007-02-12 00:55:38 -0800272const struct inode_operations bfs_dir_inops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273 .create = bfs_create,
274 .lookup = bfs_lookup,
275 .link = bfs_link,
276 .unlink = bfs_unlink,
277 .rename = bfs_rename,
278};
279
Dmitri Vorobievf433dc52007-11-14 16:59:47 -0800280static int bfs_add_entry(struct inode *dir, const unsigned char *name,
281 int namelen, int ino)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282{
Dmitri Vorobievf433dc52007-11-14 16:59:47 -0800283 struct buffer_head *bh;
284 struct bfs_dirent *de;
285 int block, sblock, eblock, off, pos;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286 int i;
287
288 dprintf("name=%s, namelen=%d\n", name, namelen);
289
290 if (!namelen)
291 return -ENOENT;
292 if (namelen > BFS_NAMELEN)
293 return -ENAMETOOLONG;
294
295 sblock = BFS_I(dir)->i_sblock;
296 eblock = BFS_I(dir)->i_eblock;
Dmitri Vorobievf433dc52007-11-14 16:59:47 -0800297 for (block = sblock; block <= eblock; block++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700298 bh = sb_bread(dir->i_sb, block);
Dmitri Vorobievf433dc52007-11-14 16:59:47 -0800299 if (!bh)
Sanidhya Kashyapc3fe5872015-04-16 12:48:32 -0700300 return -EIO;
Dmitri Vorobievf433dc52007-11-14 16:59:47 -0800301 for (off = 0; off < BFS_BSIZE; off += BFS_DIRENT_SIZE) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700302 de = (struct bfs_dirent *)(bh->b_data + off);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303 if (!de->ino) {
Dmitri Vorobievf433dc52007-11-14 16:59:47 -0800304 pos = (block - sblock) * BFS_BSIZE + off;
305 if (pos >= dir->i_size) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306 dir->i_size += BFS_DIRENT_SIZE;
Deepa Dinamani02027d42016-09-14 07:48:05 -0700307 dir->i_ctime = current_time(dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308 }
Deepa Dinamani02027d42016-09-14 07:48:05 -0700309 dir->i_mtime = current_time(dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700310 mark_inode_dirty(dir);
Andrew Stribblehillfac92be2005-09-09 13:02:04 -0700311 de->ino = cpu_to_le16((u16)ino);
Dmitri Vorobievf433dc52007-11-14 16:59:47 -0800312 for (i = 0; i < BFS_NAMELEN; i++)
313 de->name[i] =
314 (i < namelen) ? name[i] : 0;
Al Viro4427f0c2009-06-08 01:15:58 -0400315 mark_buffer_dirty_inode(bh, dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700316 brelse(bh);
317 return 0;
318 }
319 }
320 brelse(bh);
321 }
322 return -ENOSPC;
323}
324
Dmitri Vorobievf433dc52007-11-14 16:59:47 -0800325static inline int bfs_namecmp(int len, const unsigned char *name,
326 const char *buffer)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700327{
Dmitri Vorobievf433dc52007-11-14 16:59:47 -0800328 if ((len < BFS_NAMELEN) && buffer[len])
Linus Torvalds1da177e2005-04-16 15:20:36 -0700329 return 0;
330 return !memcmp(name, buffer, len);
331}
332
Dmitri Vorobievf433dc52007-11-14 16:59:47 -0800333static struct buffer_head *bfs_find_entry(struct inode *dir,
334 const unsigned char *name, int namelen,
335 struct bfs_dirent **res_dir)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336{
Dmitri Vorobievf433dc52007-11-14 16:59:47 -0800337 unsigned long block = 0, offset = 0;
338 struct buffer_head *bh = NULL;
339 struct bfs_dirent *de;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700340
341 *res_dir = NULL;
342 if (namelen > BFS_NAMELEN)
343 return NULL;
Dmitri Vorobievf433dc52007-11-14 16:59:47 -0800344
Linus Torvalds1da177e2005-04-16 15:20:36 -0700345 while (block * BFS_BSIZE + offset < dir->i_size) {
346 if (!bh) {
347 bh = sb_bread(dir->i_sb, BFS_I(dir)->i_sblock + block);
348 if (!bh) {
349 block++;
350 continue;
351 }
352 }
353 de = (struct bfs_dirent *)(bh->b_data + offset);
354 offset += BFS_DIRENT_SIZE;
Dmitri Vorobievf433dc52007-11-14 16:59:47 -0800355 if (le16_to_cpu(de->ino) &&
356 bfs_namecmp(namelen, name, de->name)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700357 *res_dir = de;
358 return bh;
359 }
360 if (offset < bh->b_size)
361 continue;
362 brelse(bh);
363 bh = NULL;
364 offset = 0;
365 block++;
366 }
367 brelse(bh);
368 return NULL;
369}