blob: 95fee278ab9da660608226b478645878424bbf64 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * namei.c
3 *
4 * PURPOSE
5 * Inode name handling routines for the OSTA-UDF(tm) filesystem.
6 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07007 * COPYRIGHT
8 * This file is distributed under the terms of the GNU General Public
9 * License (GPL). Copies of the GPL can be obtained from:
10 * ftp://prep.ai.mit.edu/pub/gnu/GPL
11 * Each contributing author retains all rights to their own work.
12 *
13 * (C) 1998-2004 Ben Fennema
14 * (C) 1999-2000 Stelias Computing Inc
15 *
16 * HISTORY
17 *
18 * 12/12/98 blf Created. Split out the lookup code from dir.c
19 * 04/19/99 blf link, mknod, symlink support
20 */
21
22#include "udfdecl.h"
23
24#include "udf_i.h"
25#include "udf_sb.h"
26#include <linux/string.h>
27#include <linux/errno.h>
28#include <linux/mm.h>
29#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070030#include <linux/buffer_head.h>
Alexey Dobriyane8edc6e2007-05-21 01:22:52 +040031#include <linux/sched.h>
Bob Copelandf845fce2008-04-17 09:47:48 +020032#include <linux/crc-itu-t.h>
Rasmus Rohde221e5832008-04-30 17:22:06 +020033#include <linux/exportfs.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070034
Al Viro391e8bb2010-01-31 21:28:48 -050035static inline int udf_match(int len1, const unsigned char *name1, int len2,
36 const unsigned char *name2)
Linus Torvalds1da177e2005-04-16 15:20:36 -070037{
38 if (len1 != len2)
39 return 0;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -070040
Linus Torvalds1da177e2005-04-16 15:20:36 -070041 return !memcmp(name1, name2, len1);
42}
43
44int udf_write_fi(struct inode *inode, struct fileIdentDesc *cfi,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -070045 struct fileIdentDesc *sfi, struct udf_fileident_bh *fibh,
Marcin Slusarz4b111112008-02-08 04:20:36 -080046 uint8_t *impuse, uint8_t *fileident)
Linus Torvalds1da177e2005-04-16 15:20:36 -070047{
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +020048 uint16_t crclen = fibh->eoffset - fibh->soffset - sizeof(struct tag);
Linus Torvalds1da177e2005-04-16 15:20:36 -070049 uint16_t crc;
Linus Torvalds1da177e2005-04-16 15:20:36 -070050 int offset;
51 uint16_t liu = le16_to_cpu(cfi->lengthOfImpUse);
52 uint8_t lfi = cfi->lengthFileIdent;
53 int padlen = fibh->eoffset - fibh->soffset - liu - lfi -
Cyrill Gorcunov28de7942007-07-21 04:37:18 -070054 sizeof(struct fileIdentDesc);
Linus Torvalds1da177e2005-04-16 15:20:36 -070055 int adinicb = 0;
56
Marcin Slusarzc0b34432008-02-08 04:20:42 -080057 if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
Linus Torvalds1da177e2005-04-16 15:20:36 -070058 adinicb = 1;
59
60 offset = fibh->soffset + sizeof(struct fileIdentDesc);
61
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -070062 if (impuse) {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -070063 if (adinicb || (offset + liu < 0)) {
64 memcpy((uint8_t *)sfi->impUse, impuse, liu);
65 } else if (offset >= 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -070066 memcpy(fibh->ebh->b_data + offset, impuse, liu);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -070067 } else {
68 memcpy((uint8_t *)sfi->impUse, impuse, -offset);
Marcin Slusarz4b111112008-02-08 04:20:36 -080069 memcpy(fibh->ebh->b_data, impuse - offset,
70 liu + offset);
Linus Torvalds1da177e2005-04-16 15:20:36 -070071 }
72 }
73
74 offset += liu;
75
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -070076 if (fileident) {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -070077 if (adinicb || (offset + lfi < 0)) {
78 memcpy((uint8_t *)sfi->fileIdent + liu, fileident, lfi);
79 } else if (offset >= 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -070080 memcpy(fibh->ebh->b_data + offset, fileident, lfi);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -070081 } else {
Marcin Slusarz4b111112008-02-08 04:20:36 -080082 memcpy((uint8_t *)sfi->fileIdent + liu, fileident,
83 -offset);
84 memcpy(fibh->ebh->b_data, fileident - offset,
85 lfi + offset);
Linus Torvalds1da177e2005-04-16 15:20:36 -070086 }
87 }
88
89 offset += lfi;
90
Cyrill Gorcunov28de7942007-07-21 04:37:18 -070091 if (adinicb || (offset + padlen < 0)) {
92 memset((uint8_t *)sfi->padding + liu + lfi, 0x00, padlen);
93 } else if (offset >= 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -070094 memset(fibh->ebh->b_data + offset, 0x00, padlen);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -070095 } else {
96 memset((uint8_t *)sfi->padding + liu + lfi, 0x00, -offset);
Linus Torvalds1da177e2005-04-16 15:20:36 -070097 memset(fibh->ebh->b_data, 0x00, padlen + offset);
98 }
99
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200100 crc = crc_itu_t(0, (uint8_t *)cfi + sizeof(struct tag),
101 sizeof(struct fileIdentDesc) - sizeof(struct tag));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700103 if (fibh->sbh == fibh->ebh) {
Bob Copelandf845fce2008-04-17 09:47:48 +0200104 crc = crc_itu_t(crc, (uint8_t *)sfi->impUse,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200105 crclen + sizeof(struct tag) -
Bob Copelandf845fce2008-04-17 09:47:48 +0200106 sizeof(struct fileIdentDesc));
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700107 } else if (sizeof(struct fileIdentDesc) >= -fibh->soffset) {
Bob Copelandf845fce2008-04-17 09:47:48 +0200108 crc = crc_itu_t(crc, fibh->ebh->b_data +
Marcin Slusarz4b111112008-02-08 04:20:36 -0800109 sizeof(struct fileIdentDesc) +
110 fibh->soffset,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200111 crclen + sizeof(struct tag) -
Bob Copelandf845fce2008-04-17 09:47:48 +0200112 sizeof(struct fileIdentDesc));
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700113 } else {
Bob Copelandf845fce2008-04-17 09:47:48 +0200114 crc = crc_itu_t(crc, (uint8_t *)sfi->impUse,
115 -fibh->soffset - sizeof(struct fileIdentDesc));
116 crc = crc_itu_t(crc, fibh->ebh->b_data, fibh->eoffset);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117 }
118
119 cfi->descTag.descCRC = cpu_to_le16(crc);
120 cfi->descTag.descCRCLength = cpu_to_le16(crclen);
Marcin Slusarz3f2587b2008-02-08 04:20:39 -0800121 cfi->descTag.tagChecksum = udf_tag_checksum(&cfi->descTag);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700123 if (adinicb || (sizeof(struct fileIdentDesc) <= -fibh->soffset)) {
Marcin Slusarz4b111112008-02-08 04:20:36 -0800124 memcpy((uint8_t *)sfi, (uint8_t *)cfi,
125 sizeof(struct fileIdentDesc));
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700126 } else {
127 memcpy((uint8_t *)sfi, (uint8_t *)cfi, -fibh->soffset);
128 memcpy(fibh->ebh->b_data, (uint8_t *)cfi - fibh->soffset,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700129 sizeof(struct fileIdentDesc) + fibh->soffset);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130 }
131
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700132 if (adinicb) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133 mark_inode_dirty(inode);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700134 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700135 if (fibh->sbh != fibh->ebh)
136 mark_buffer_dirty_inode(fibh->ebh, inode);
137 mark_buffer_dirty_inode(fibh->sbh, inode);
138 }
139 return 0;
140}
141
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700142static struct fileIdentDesc *udf_find_entry(struct inode *dir,
Al Viro391e8bb2010-01-31 21:28:48 -0500143 const struct qstr *child,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700144 struct udf_fileident_bh *fibh,
145 struct fileIdentDesc *cfi)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146{
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700147 struct fileIdentDesc *fi = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148 loff_t f_pos;
149 int block, flen;
Al Viro391e8bb2010-01-31 21:28:48 -0500150 unsigned char *fname = NULL;
151 unsigned char *nameptr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152 uint8_t lfi;
153 uint16_t liu;
KAMBAROV, ZAURec471dc2005-06-28 20:45:10 -0700154 loff_t size;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200155 struct kernel_lb_addr eloc;
Jan Karaff116fc2007-05-08 00:35:14 -0700156 uint32_t elen;
Jan Kara60448b12007-05-08 00:35:13 -0700157 sector_t offset;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700158 struct extent_position epos = {};
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800159 struct udf_inode_info *dinfo = UDF_I(dir);
Al Viro9fbb76c2008-10-12 00:15:17 -0400160 int isdotdot = child->len == 2 &&
161 child->name[0] == '.' && child->name[1] == '.';
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162
Jan Karaaf793292008-02-08 04:20:50 -0800163 size = udf_ext0_offset(dir) + dir->i_size;
164 f_pos = udf_ext0_offset(dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165
Jan Karab80697c2008-03-04 14:14:05 +0100166 fibh->sbh = fibh->ebh = NULL;
Jan Karaaf793292008-02-08 04:20:50 -0800167 fibh->soffset = fibh->eoffset = f_pos & (dir->i_sb->s_blocksize - 1);
Jan Karab80697c2008-03-04 14:14:05 +0100168 if (dinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
169 if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits, &epos,
170 &eloc, &elen, &offset) != (EXT_RECORDED_ALLOCATED >> 30))
171 goto out_err;
Pekka Enberg97e961f2008-10-15 12:29:03 +0200172 block = udf_get_lb_pblock(dir->i_sb, &eloc, offset);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700173 if ((++offset << dir->i_sb->s_blocksize_bits) < elen) {
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800174 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200175 epos.offset -= sizeof(struct short_ad);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800176 else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200177 epos.offset -= sizeof(struct long_ad);
Marcin Slusarz4b111112008-02-08 04:20:36 -0800178 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179 offset = 0;
180
Marcin Slusarz4b111112008-02-08 04:20:36 -0800181 fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block);
Jan Karab80697c2008-03-04 14:14:05 +0100182 if (!fibh->sbh)
183 goto out_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184 }
185
Jan Karab80697c2008-03-04 14:14:05 +0100186 fname = kmalloc(UDF_NAME_LEN, GFP_NOFS);
187 if (!fname)
188 goto out_err;
189
Jan Karaaf793292008-02-08 04:20:50 -0800190 while (f_pos < size) {
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700191 fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc,
192 &elen, &offset);
Jan Karab80697c2008-03-04 14:14:05 +0100193 if (!fi)
194 goto out_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195
196 liu = le16_to_cpu(cfi->lengthOfImpUse);
197 lfi = cfi->lengthFileIdent;
198
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700199 if (fibh->sbh == fibh->ebh) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200 nameptr = fi->fileIdent + liu;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700201 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202 int poffset; /* Unpaded ending offset */
203
Marcin Slusarz4b111112008-02-08 04:20:36 -0800204 poffset = fibh->soffset + sizeof(struct fileIdentDesc) +
205 liu + lfi;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700206
Marcin Slusarz4b111112008-02-08 04:20:36 -0800207 if (poffset >= lfi)
208 nameptr = (uint8_t *)(fibh->ebh->b_data +
209 poffset - lfi);
210 else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211 nameptr = fname;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800212 memcpy(nameptr, fi->fileIdent + liu,
213 lfi - poffset);
214 memcpy(nameptr + lfi - poffset,
215 fibh->ebh->b_data, poffset);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216 }
217 }
218
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700219 if ((cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) {
220 if (!UDF_QUERY_FLAG(dir->i_sb, UDF_FLAG_UNDELETE))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221 continue;
222 }
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700223
224 if ((cfi->fileCharacteristics & FID_FILE_CHAR_HIDDEN) != 0) {
225 if (!UDF_QUERY_FLAG(dir->i_sb, UDF_FLAG_UNHIDE))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226 continue;
227 }
228
Rasmus Rohde221e5832008-04-30 17:22:06 +0200229 if ((cfi->fileCharacteristics & FID_FILE_CHAR_PARENT) &&
Jesper Juhla4264b32010-12-12 23:18:15 +0100230 isdotdot)
231 goto out_ok;
Rasmus Rohde221e5832008-04-30 17:22:06 +0200232
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233 if (!lfi)
234 continue;
235
Marcin Slusarz4b111112008-02-08 04:20:36 -0800236 flen = udf_get_filename(dir->i_sb, nameptr, fname, lfi);
Al Viro9fbb76c2008-10-12 00:15:17 -0400237 if (flen && udf_match(flen, fname, child->len, child->name))
Jan Karab80697c2008-03-04 14:14:05 +0100238 goto out_ok;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239 }
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700240
Jan Karab80697c2008-03-04 14:14:05 +0100241out_err:
242 fi = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243 if (fibh->sbh != fibh->ebh)
Jan Kara3bf25cb2007-05-08 00:35:16 -0700244 brelse(fibh->ebh);
245 brelse(fibh->sbh);
Jan Karab80697c2008-03-04 14:14:05 +0100246out_ok:
Jan Kara3bf25cb2007-05-08 00:35:16 -0700247 brelse(epos.bh);
Jan Karab80697c2008-03-04 14:14:05 +0100248 kfree(fname);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700249
Jan Karab80697c2008-03-04 14:14:05 +0100250 return fi;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251}
252
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700253static struct dentry *udf_lookup(struct inode *dir, struct dentry *dentry,
Al Viro00cd8dd2012-06-10 17:13:09 -0400254 unsigned int flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255{
256 struct inode *inode = NULL;
Jayachandran Cdb9a3692006-02-03 03:04:50 -0800257 struct fileIdentDesc cfi;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258 struct udf_fileident_bh fibh;
259
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700260 if (dentry->d_name.len > UDF_NAME_LEN - 2)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261 return ERR_PTR(-ENAMETOOLONG);
262
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263#ifdef UDF_RECOVERY
264 /* temporary shorthand for specifying files by inode number */
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700265 if (!strncmp(dentry->d_name.name, ".B=", 3)) {
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200266 struct kernel_lb_addr lb = {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700267 .logicalBlockNum = 0,
Marcin Slusarz4b111112008-02-08 04:20:36 -0800268 .partitionReferenceNum =
269 simple_strtoul(dentry->d_name.name + 3,
270 NULL, 0),
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700271 };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272 inode = udf_iget(dir->i_sb, lb);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700273 if (!inode) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700274 return ERR_PTR(-EACCES);
275 }
Marcin Slusarz4b111112008-02-08 04:20:36 -0800276 } else
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700277#endif /* UDF_RECOVERY */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700278
Al Viro9fbb76c2008-10-12 00:15:17 -0400279 if (udf_find_entry(dir, &dentry->d_name, &fibh, &cfi)) {
Pekka Enberg97e961f2008-10-15 12:29:03 +0200280 struct kernel_lb_addr loc;
281
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282 if (fibh.sbh != fibh.ebh)
Jan Kara3bf25cb2007-05-08 00:35:16 -0700283 brelse(fibh.ebh);
284 brelse(fibh.sbh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700285
Pekka Enberg97e961f2008-10-15 12:29:03 +0200286 loc = lelb_to_cpu(cfi.icb.extLocation);
287 inode = udf_iget(dir->i_sb, &loc);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700288 if (!inode) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289 return ERR_PTR(-EACCES);
290 }
291 }
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700292
Rasmus Rohde221e5832008-04-30 17:22:06 +0200293 return d_splice_alias(inode, dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700294}
295
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700296static struct fileIdentDesc *udf_add_entry(struct inode *dir,
297 struct dentry *dentry,
298 struct udf_fileident_bh *fibh,
299 struct fileIdentDesc *cfi, int *err)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300{
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800301 struct super_block *sb = dir->i_sb;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700302 struct fileIdentDesc *fi = NULL;
Al Viro391e8bb2010-01-31 21:28:48 -0500303 unsigned char *name = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304 int namelen;
305 loff_t f_pos;
Jan Karaaf793292008-02-08 04:20:50 -0800306 loff_t size = udf_ext0_offset(dir) + dir->i_size;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307 int nfidlen;
308 uint8_t lfi;
309 uint16_t liu;
310 int block;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200311 struct kernel_lb_addr eloc;
Jan Kara9afadc42008-05-06 18:26:17 +0200312 uint32_t elen = 0;
Jan Kara60448b12007-05-08 00:35:13 -0700313 sector_t offset;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700314 struct extent_position epos = {};
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800315 struct udf_inode_info *dinfo;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700316
Jan Karab80697c2008-03-04 14:14:05 +0100317 fibh->sbh = fibh->ebh = NULL;
318 name = kmalloc(UDF_NAME_LEN, GFP_NOFS);
319 if (!name) {
320 *err = -ENOMEM;
321 goto out_err;
322 }
323
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700324 if (dentry) {
325 if (!dentry->d_name.len) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326 *err = -EINVAL;
Jan Karab80697c2008-03-04 14:14:05 +0100327 goto out_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328 }
Marcin Slusarz4b111112008-02-08 04:20:36 -0800329 namelen = udf_put_filename(sb, dentry->d_name.name, name,
330 dentry->d_name.len);
331 if (!namelen) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700332 *err = -ENAMETOOLONG;
Jan Karab80697c2008-03-04 14:14:05 +0100333 goto out_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700334 }
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700335 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336 namelen = 0;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700337 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338
339 nfidlen = (sizeof(struct fileIdentDesc) + namelen + 3) & ~3;
340
Jan Karaaf793292008-02-08 04:20:50 -0800341 f_pos = udf_ext0_offset(dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342
Jan Karaaf793292008-02-08 04:20:50 -0800343 fibh->soffset = fibh->eoffset = f_pos & (dir->i_sb->s_blocksize - 1);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800344 dinfo = UDF_I(dir);
Jan Karab80697c2008-03-04 14:14:05 +0100345 if (dinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
346 if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits, &epos,
347 &eloc, &elen, &offset) != (EXT_RECORDED_ALLOCATED >> 30)) {
348 block = udf_get_lb_pblock(dir->i_sb,
Pekka Enberg97e961f2008-10-15 12:29:03 +0200349 &dinfo->i_location, 0);
Jan Karab80697c2008-03-04 14:14:05 +0100350 fibh->soffset = fibh->eoffset = sb->s_blocksize;
351 goto add;
352 }
Pekka Enberg97e961f2008-10-15 12:29:03 +0200353 block = udf_get_lb_pblock(dir->i_sb, &eloc, offset);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700354 if ((++offset << dir->i_sb->s_blocksize_bits) < elen) {
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800355 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200356 epos.offset -= sizeof(struct short_ad);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800357 else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200358 epos.offset -= sizeof(struct long_ad);
Marcin Slusarz4b111112008-02-08 04:20:36 -0800359 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360 offset = 0;
361
Marcin Slusarz4b111112008-02-08 04:20:36 -0800362 fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block);
363 if (!fibh->sbh) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700364 *err = -EIO;
Jan Karab80697c2008-03-04 14:14:05 +0100365 goto out_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700366 }
367
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800368 block = dinfo->i_location.logicalBlockNum;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369 }
370
Jan Karaaf793292008-02-08 04:20:50 -0800371 while (f_pos < size) {
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700372 fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc,
373 &elen, &offset);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700375 if (!fi) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700376 *err = -EIO;
Jan Karab80697c2008-03-04 14:14:05 +0100377 goto out_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378 }
379
380 liu = le16_to_cpu(cfi->lengthOfImpUse);
381 lfi = cfi->lengthFileIdent;
382
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700383 if ((cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) {
Marcin Slusarz4b111112008-02-08 04:20:36 -0800384 if (((sizeof(struct fileIdentDesc) +
385 liu + lfi + 3) & ~3) == nfidlen) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386 cfi->descTag.tagSerialNum = cpu_to_le16(1);
387 cfi->fileVersionNum = cpu_to_le16(1);
388 cfi->fileCharacteristics = 0;
389 cfi->lengthFileIdent = namelen;
390 cfi->lengthOfImpUse = cpu_to_le16(0);
Marcin Slusarz4b111112008-02-08 04:20:36 -0800391 if (!udf_write_fi(dir, cfi, fi, fibh, NULL,
392 name))
Jan Karab80697c2008-03-04 14:14:05 +0100393 goto out_ok;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800394 else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700395 *err = -EIO;
Jan Karab80697c2008-03-04 14:14:05 +0100396 goto out_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700397 }
398 }
399 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700400 }
401
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700402add:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403 f_pos += nfidlen;
404
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800405 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB &&
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700406 sb->s_blocksize - fibh->eoffset < nfidlen) {
Jan Kara3bf25cb2007-05-08 00:35:16 -0700407 brelse(epos.bh);
Jan Karaff116fc2007-05-08 00:35:14 -0700408 epos.bh = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409 fibh->soffset -= udf_ext0_offset(dir);
410 fibh->eoffset -= udf_ext0_offset(dir);
Jan Karaaf793292008-02-08 04:20:50 -0800411 f_pos -= udf_ext0_offset(dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700412 if (fibh->sbh != fibh->ebh)
Jan Kara3bf25cb2007-05-08 00:35:16 -0700413 brelse(fibh->ebh);
414 brelse(fibh->sbh);
Marcin Slusarz4b111112008-02-08 04:20:36 -0800415 fibh->sbh = fibh->ebh =
416 udf_expand_dir_adinicb(dir, &block, err);
417 if (!fibh->sbh)
Jan Karab80697c2008-03-04 14:14:05 +0100418 goto out_err;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800419 epos.block = dinfo->i_location;
Jan Karaff116fc2007-05-08 00:35:14 -0700420 epos.offset = udf_file_entry_alloc_offset(dir);
Jan Kara05343c42008-02-08 04:20:51 -0800421 /* Load extent udf_expand_dir_adinicb() has created */
422 udf_current_aext(dir, &epos, &eloc, &elen, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700423 }
424
Jan Kara2c948b32009-12-03 13:39:28 +0100425 /* Entry fits into current block? */
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700426 if (sb->s_blocksize - fibh->eoffset >= nfidlen) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700427 fibh->soffset = fibh->eoffset;
428 fibh->eoffset += nfidlen;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700429 if (fibh->sbh != fibh->ebh) {
Jan Kara3bf25cb2007-05-08 00:35:16 -0700430 brelse(fibh->sbh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700431 fibh->sbh = fibh->ebh;
432 }
433
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800434 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
435 block = dinfo->i_location.logicalBlockNum;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800436 fi = (struct fileIdentDesc *)
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800437 (dinfo->i_ext.i_data +
Marcin Slusarzc0b34432008-02-08 04:20:42 -0800438 fibh->soffset -
Marcin Slusarz4b111112008-02-08 04:20:36 -0800439 udf_ext0_offset(dir) +
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800440 dinfo->i_lenEAttr);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700441 } else {
Marcin Slusarz4b111112008-02-08 04:20:36 -0800442 block = eloc.logicalBlockNum +
443 ((elen - 1) >>
444 dir->i_sb->s_blocksize_bits);
445 fi = (struct fileIdentDesc *)
446 (fibh->sbh->b_data + fibh->soffset);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700447 }
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700448 } else {
Jan Kara2c948b32009-12-03 13:39:28 +0100449 /* Round up last extent in the file */
450 elen = (elen + sb->s_blocksize - 1) & ~(sb->s_blocksize - 1);
451 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
452 epos.offset -= sizeof(struct short_ad);
453 else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
454 epos.offset -= sizeof(struct long_ad);
455 udf_write_aext(dir, &epos, &eloc, elen, 1);
456 dinfo->i_lenExtents = (dinfo->i_lenExtents + sb->s_blocksize
457 - 1) & ~(sb->s_blocksize - 1);
458
Linus Torvalds1da177e2005-04-16 15:20:36 -0700459 fibh->soffset = fibh->eoffset - sb->s_blocksize;
460 fibh->eoffset += nfidlen - sb->s_blocksize;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700461 if (fibh->sbh != fibh->ebh) {
Jan Kara3bf25cb2007-05-08 00:35:16 -0700462 brelse(fibh->sbh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700463 fibh->sbh = fibh->ebh;
464 }
465
466 block = eloc.logicalBlockNum + ((elen - 1) >>
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700467 dir->i_sb->s_blocksize_bits);
Marcin Slusarz4b111112008-02-08 04:20:36 -0800468 fibh->ebh = udf_bread(dir,
Jan Karaaf793292008-02-08 04:20:50 -0800469 f_pos >> dir->i_sb->s_blocksize_bits, 1, err);
Jan Karab80697c2008-03-04 14:14:05 +0100470 if (!fibh->ebh)
471 goto out_err;
Jan Kara4651c592010-11-25 03:56:24 +0100472 /* Extents could have been merged, invalidate our position */
473 brelse(epos.bh);
474 epos.bh = NULL;
475 epos.block = dinfo->i_location;
476 epos.offset = udf_file_entry_alloc_offset(dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700477
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700478 if (!fibh->soffset) {
Jan Kara4651c592010-11-25 03:56:24 +0100479 /* Find the freshly allocated block */
480 while (udf_next_aext(dir, &epos, &eloc, &elen, 1) ==
481 (EXT_RECORDED_ALLOCATED >> 30))
482 ;
483 block = eloc.logicalBlockNum + ((elen - 1) >>
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700484 dir->i_sb->s_blocksize_bits);
Jan Kara3bf25cb2007-05-08 00:35:16 -0700485 brelse(fibh->sbh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700486 fibh->sbh = fibh->ebh;
487 fi = (struct fileIdentDesc *)(fibh->sbh->b_data);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700488 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700489 fi = (struct fileIdentDesc *)
Marcin Slusarz4b111112008-02-08 04:20:36 -0800490 (fibh->sbh->b_data + sb->s_blocksize +
491 fibh->soffset);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492 }
493 }
494
495 memset(cfi, 0, sizeof(struct fileIdentDesc));
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800496 if (UDF_SB(sb)->s_udfrev >= 0x0200)
Marcin Slusarz4b111112008-02-08 04:20:36 -0800497 udf_new_tag((char *)cfi, TAG_IDENT_FID, 3, 1, block,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200498 sizeof(struct tag));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700499 else
Marcin Slusarz4b111112008-02-08 04:20:36 -0800500 udf_new_tag((char *)cfi, TAG_IDENT_FID, 2, 1, block,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200501 sizeof(struct tag));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700502 cfi->fileVersionNum = cpu_to_le16(1);
503 cfi->lengthFileIdent = namelen;
504 cfi->lengthOfImpUse = cpu_to_le16(0);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700505 if (!udf_write_fi(dir, cfi, fi, fibh, NULL, name)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700506 dir->i_size += nfidlen;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800507 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
508 dinfo->i_lenAlloc += nfidlen;
Jan Kara2c948b32009-12-03 13:39:28 +0100509 else {
510 /* Find the last extent and truncate it to proper size */
511 while (udf_next_aext(dir, &epos, &eloc, &elen, 1) ==
512 (EXT_RECORDED_ALLOCATED >> 30))
513 ;
514 elen -= dinfo->i_lenExtents - dir->i_size;
515 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
516 epos.offset -= sizeof(struct short_ad);
517 else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
518 epos.offset -= sizeof(struct long_ad);
519 udf_write_aext(dir, &epos, &eloc, elen, 1);
520 dinfo->i_lenExtents = dir->i_size;
521 }
522
Linus Torvalds1da177e2005-04-16 15:20:36 -0700523 mark_inode_dirty(dir);
Jan Karab80697c2008-03-04 14:14:05 +0100524 goto out_ok;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700525 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700526 *err = -EIO;
Jan Karab80697c2008-03-04 14:14:05 +0100527 goto out_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700528 }
Jan Karab80697c2008-03-04 14:14:05 +0100529
530out_err:
531 fi = NULL;
532 if (fibh->sbh != fibh->ebh)
533 brelse(fibh->ebh);
534 brelse(fibh->sbh);
535out_ok:
536 brelse(epos.bh);
537 kfree(name);
538 return fi;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700539}
540
541static int udf_delete_entry(struct inode *inode, struct fileIdentDesc *fi,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700542 struct udf_fileident_bh *fibh,
543 struct fileIdentDesc *cfi)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700544{
545 cfi->fileCharacteristics |= FID_FILE_CHAR_DELETED;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700546
Linus Torvalds1da177e2005-04-16 15:20:36 -0700547 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT))
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200548 memset(&(cfi->icb), 0x00, sizeof(struct long_ad));
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700549
Linus Torvalds1da177e2005-04-16 15:20:36 -0700550 return udf_write_fi(inode, cfi, fi, fibh, NULL, NULL);
551}
552
Al Viro4acdaf22011-07-26 01:42:34 -0400553static int udf_create(struct inode *dir, struct dentry *dentry, umode_t mode,
Al Viroebfc3b42012-06-10 18:05:36 -0400554 bool excl)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700555{
556 struct udf_fileident_bh fibh;
557 struct inode *inode;
558 struct fileIdentDesc cfi, *fi;
559 int err;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800560 struct udf_inode_info *iinfo;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700561
Linus Torvalds1da177e2005-04-16 15:20:36 -0700562 inode = udf_new_inode(dir, mode, &err);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700563 if (!inode) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700564 return err;
565 }
566
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800567 iinfo = UDF_I(inode);
568 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700569 inode->i_data.a_ops = &udf_adinicb_aops;
570 else
571 inode->i_data.a_ops = &udf_aops;
572 inode->i_op = &udf_file_inode_operations;
573 inode->i_fop = &udf_file_operations;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700574 mark_inode_dirty(inode);
575
Marcin Slusarz4b111112008-02-08 04:20:36 -0800576 fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
577 if (!fi) {
Miklos Szeredi6d6b77f2011-10-28 14:13:28 +0200578 inode_dec_link_count(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700579 iput(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700580 return err;
581 }
582 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800583 cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700584 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800585 cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700586 udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
Marcin Slusarzc0b34432008-02-08 04:20:42 -0800587 if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700588 mark_inode_dirty(dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700589 if (fibh.sbh != fibh.ebh)
Jan Kara3bf25cb2007-05-08 00:35:16 -0700590 brelse(fibh.ebh);
591 brelse(fibh.sbh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700592 d_instantiate(dentry, inode);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700593
Linus Torvalds1da177e2005-04-16 15:20:36 -0700594 return 0;
595}
596
Al Viro1a67aaf2011-07-26 01:52:52 -0400597static int udf_mknod(struct inode *dir, struct dentry *dentry, umode_t mode,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700598 dev_t rdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700599{
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700600 struct inode *inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700601 struct udf_fileident_bh fibh;
602 struct fileIdentDesc cfi, *fi;
603 int err;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800604 struct udf_inode_info *iinfo;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700605
606 if (!old_valid_dev(rdev))
607 return -EINVAL;
608
Linus Torvalds1da177e2005-04-16 15:20:36 -0700609 err = -EIO;
610 inode = udf_new_inode(dir, mode, &err);
611 if (!inode)
612 goto out;
613
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800614 iinfo = UDF_I(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700615 init_special_inode(inode, mode, rdev);
Marcin Slusarz4b111112008-02-08 04:20:36 -0800616 fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
617 if (!fi) {
Miklos Szeredi6d6b77f2011-10-28 14:13:28 +0200618 inode_dec_link_count(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700619 iput(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700620 return err;
621 }
622 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800623 cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700624 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800625 cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700626 udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
Marcin Slusarzc0b34432008-02-08 04:20:42 -0800627 if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700628 mark_inode_dirty(dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700629 mark_inode_dirty(inode);
630
631 if (fibh.sbh != fibh.ebh)
Jan Kara3bf25cb2007-05-08 00:35:16 -0700632 brelse(fibh.ebh);
633 brelse(fibh.sbh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700634 d_instantiate(dentry, inode);
635 err = 0;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700636
637out:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700638 return err;
639}
640
Al Viro18bb1db2011-07-26 01:41:39 -0400641static int udf_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700642{
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700643 struct inode *inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700644 struct udf_fileident_bh fibh;
645 struct fileIdentDesc cfi, *fi;
646 int err;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800647 struct udf_inode_info *dinfo = UDF_I(dir);
648 struct udf_inode_info *iinfo;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700649
Linus Torvalds1da177e2005-04-16 15:20:36 -0700650 err = -EIO;
Dmitry Monakhova6c5a032010-03-04 17:32:22 +0300651 inode = udf_new_inode(dir, S_IFDIR | mode, &err);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700652 if (!inode)
653 goto out;
654
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800655 iinfo = UDF_I(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700656 inode->i_op = &udf_dir_inode_operations;
657 inode->i_fop = &udf_dir_operations;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800658 fi = udf_add_entry(inode, NULL, &fibh, &cfi, &err);
659 if (!fi) {
Miklos Szeredi6d6b77f2011-10-28 14:13:28 +0200660 inode_dec_link_count(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700661 iput(inode);
662 goto out;
663 }
Miklos Szeredibfe86842011-10-28 14:13:29 +0200664 set_nlink(inode, 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700665 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800666 cfi.icb.extLocation = cpu_to_lelb(dinfo->i_location);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700667 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800668 cpu_to_le32(dinfo->i_unique & 0x00000000FFFFFFFFUL);
Marcin Slusarz4b111112008-02-08 04:20:36 -0800669 cfi.fileCharacteristics =
670 FID_FILE_CHAR_DIRECTORY | FID_FILE_CHAR_PARENT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700671 udf_write_fi(inode, &cfi, fi, &fibh, NULL, NULL);
Jan Kara3bf25cb2007-05-08 00:35:16 -0700672 brelse(fibh.sbh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700673 mark_inode_dirty(inode);
674
Marcin Slusarz4b111112008-02-08 04:20:36 -0800675 fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
676 if (!fi) {
Miklos Szeredi6d6b77f2011-10-28 14:13:28 +0200677 clear_nlink(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700678 mark_inode_dirty(inode);
679 iput(inode);
680 goto out;
681 }
682 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800683 cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700684 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800685 cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700686 cfi.fileCharacteristics |= FID_FILE_CHAR_DIRECTORY;
687 udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
Dave Hansend8c76e62006-09-30 23:29:04 -0700688 inc_nlink(dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700689 mark_inode_dirty(dir);
690 d_instantiate(dentry, inode);
691 if (fibh.sbh != fibh.ebh)
Jan Kara3bf25cb2007-05-08 00:35:16 -0700692 brelse(fibh.ebh);
693 brelse(fibh.sbh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700694 err = 0;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700695
696out:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700697 return err;
698}
699
700static int empty_dir(struct inode *dir)
701{
702 struct fileIdentDesc *fi, cfi;
703 struct udf_fileident_bh fibh;
704 loff_t f_pos;
Jan Karaaf793292008-02-08 04:20:50 -0800705 loff_t size = udf_ext0_offset(dir) + dir->i_size;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700706 int block;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200707 struct kernel_lb_addr eloc;
Jan Karaff116fc2007-05-08 00:35:14 -0700708 uint32_t elen;
Jan Kara60448b12007-05-08 00:35:13 -0700709 sector_t offset;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700710 struct extent_position epos = {};
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800711 struct udf_inode_info *dinfo = UDF_I(dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700712
Jan Karaaf793292008-02-08 04:20:50 -0800713 f_pos = udf_ext0_offset(dir);
714 fibh.soffset = fibh.eoffset = f_pos & (dir->i_sb->s_blocksize - 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700715
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800716 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700717 fibh.sbh = fibh.ebh = NULL;
Jan Karaaf793292008-02-08 04:20:50 -0800718 else if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits,
Marcin Slusarz4b111112008-02-08 04:20:36 -0800719 &epos, &eloc, &elen, &offset) ==
720 (EXT_RECORDED_ALLOCATED >> 30)) {
Pekka Enberg97e961f2008-10-15 12:29:03 +0200721 block = udf_get_lb_pblock(dir->i_sb, &eloc, offset);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700722 if ((++offset << dir->i_sb->s_blocksize_bits) < elen) {
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800723 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200724 epos.offset -= sizeof(struct short_ad);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800725 else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200726 epos.offset -= sizeof(struct long_ad);
Marcin Slusarz4b111112008-02-08 04:20:36 -0800727 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700728 offset = 0;
729
Marcin Slusarz4b111112008-02-08 04:20:36 -0800730 fibh.sbh = fibh.ebh = udf_tread(dir->i_sb, block);
731 if (!fibh.sbh) {
Jan Kara3bf25cb2007-05-08 00:35:16 -0700732 brelse(epos.bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700733 return 0;
734 }
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700735 } else {
Jan Kara3bf25cb2007-05-08 00:35:16 -0700736 brelse(epos.bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700737 return 0;
738 }
739
Jan Karaaf793292008-02-08 04:20:50 -0800740 while (f_pos < size) {
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700741 fi = udf_fileident_read(dir, &f_pos, &fibh, &cfi, &epos, &eloc,
742 &elen, &offset);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700743 if (!fi) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700744 if (fibh.sbh != fibh.ebh)
Jan Kara3bf25cb2007-05-08 00:35:16 -0700745 brelse(fibh.ebh);
746 brelse(fibh.sbh);
747 brelse(epos.bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700748 return 0;
749 }
750
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700751 if (cfi.lengthFileIdent &&
752 (cfi.fileCharacteristics & FID_FILE_CHAR_DELETED) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700753 if (fibh.sbh != fibh.ebh)
Jan Kara3bf25cb2007-05-08 00:35:16 -0700754 brelse(fibh.ebh);
755 brelse(fibh.sbh);
756 brelse(epos.bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700757 return 0;
758 }
759 }
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700760
Linus Torvalds1da177e2005-04-16 15:20:36 -0700761 if (fibh.sbh != fibh.ebh)
Jan Kara3bf25cb2007-05-08 00:35:16 -0700762 brelse(fibh.ebh);
763 brelse(fibh.sbh);
764 brelse(epos.bh);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700765
Linus Torvalds1da177e2005-04-16 15:20:36 -0700766 return 1;
767}
768
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700769static int udf_rmdir(struct inode *dir, struct dentry *dentry)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700770{
771 int retval;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700772 struct inode *inode = dentry->d_inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700773 struct udf_fileident_bh fibh;
774 struct fileIdentDesc *fi, cfi;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200775 struct kernel_lb_addr tloc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700776
777 retval = -ENOENT;
Al Viro9fbb76c2008-10-12 00:15:17 -0400778 fi = udf_find_entry(dir, &dentry->d_name, &fibh, &cfi);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700779 if (!fi)
780 goto out;
781
782 retval = -EIO;
783 tloc = lelb_to_cpu(cfi.icb.extLocation);
Pekka Enberg97e961f2008-10-15 12:29:03 +0200784 if (udf_get_lb_pblock(dir->i_sb, &tloc, 0) != inode->i_ino)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700785 goto end_rmdir;
786 retval = -ENOTEMPTY;
787 if (!empty_dir(inode))
788 goto end_rmdir;
789 retval = udf_delete_entry(dir, fi, &fibh, &cfi);
790 if (retval)
791 goto end_rmdir;
792 if (inode->i_nlink != 2)
Joe Perchesa40ecd72011-10-10 01:08:04 -0700793 udf_warn(inode->i_sb, "empty directory has nlink != 2 (%d)\n",
794 inode->i_nlink);
Dave Hansence71ec32006-09-30 23:29:06 -0700795 clear_nlink(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700796 inode->i_size = 0;
Stephen Mollettc007c062007-05-08 00:31:31 -0700797 inode_dec_link_count(dir);
Marcin Slusarz4b111112008-02-08 04:20:36 -0800798 inode->i_ctime = dir->i_ctime = dir->i_mtime =
799 current_fs_time(dir->i_sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700800 mark_inode_dirty(dir);
801
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700802end_rmdir:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700803 if (fibh.sbh != fibh.ebh)
Jan Kara3bf25cb2007-05-08 00:35:16 -0700804 brelse(fibh.ebh);
805 brelse(fibh.sbh);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700806
807out:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700808 return retval;
809}
810
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700811static int udf_unlink(struct inode *dir, struct dentry *dentry)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700812{
813 int retval;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700814 struct inode *inode = dentry->d_inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700815 struct udf_fileident_bh fibh;
816 struct fileIdentDesc *fi;
817 struct fileIdentDesc cfi;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200818 struct kernel_lb_addr tloc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700819
820 retval = -ENOENT;
Al Viro9fbb76c2008-10-12 00:15:17 -0400821 fi = udf_find_entry(dir, &dentry->d_name, &fibh, &cfi);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700822 if (!fi)
823 goto out;
824
825 retval = -EIO;
826 tloc = lelb_to_cpu(cfi.icb.extLocation);
Pekka Enberg97e961f2008-10-15 12:29:03 +0200827 if (udf_get_lb_pblock(dir->i_sb, &tloc, 0) != inode->i_ino)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700828 goto end_unlink;
829
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700830 if (!inode->i_nlink) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700831 udf_debug("Deleting nonexistent file (%lu), %d\n",
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700832 inode->i_ino, inode->i_nlink);
Miklos Szeredibfe86842011-10-28 14:13:29 +0200833 set_nlink(inode, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700834 }
835 retval = udf_delete_entry(dir, fi, &fibh, &cfi);
836 if (retval)
837 goto end_unlink;
838 dir->i_ctime = dir->i_mtime = current_fs_time(dir->i_sb);
839 mark_inode_dirty(dir);
Dave Hansen9a53c3a2006-09-30 23:29:03 -0700840 inode_dec_link_count(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700841 inode->i_ctime = dir->i_ctime;
842 retval = 0;
843
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700844end_unlink:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700845 if (fibh.sbh != fibh.ebh)
Jan Kara3bf25cb2007-05-08 00:35:16 -0700846 brelse(fibh.ebh);
847 brelse(fibh.sbh);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700848
849out:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700850 return retval;
851}
852
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700853static int udf_symlink(struct inode *dir, struct dentry *dentry,
854 const char *symname)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700855{
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700856 struct inode *inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700857 struct pathComponent *pc;
Al Viro391e8bb2010-01-31 21:28:48 -0500858 const char *compstart;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700859 struct udf_fileident_bh fibh;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700860 struct extent_position epos = {};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700861 int eoffset, elen = 0;
862 struct fileIdentDesc *fi;
863 struct fileIdentDesc cfi;
Al Viro391e8bb2010-01-31 21:28:48 -0500864 uint8_t *ea;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700865 int err;
866 int block;
Al Viro391e8bb2010-01-31 21:28:48 -0500867 unsigned char *name = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700868 int namelen;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800869 struct udf_inode_info *iinfo;
Jan Karad664b6a2010-10-20 18:28:46 +0200870 struct super_block *sb = dir->i_sb;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700871
Dmitry Monakhova6c5a032010-03-04 17:32:22 +0300872 inode = udf_new_inode(dir, S_IFLNK | S_IRWXUGO, &err);
Marcin Slusarz4b111112008-02-08 04:20:36 -0800873 if (!inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700874 goto out;
875
Alessio Igor Bogani4d0fb622010-11-16 18:40:47 +0100876 iinfo = UDF_I(inode);
877 down_write(&iinfo->i_data_sem);
Jan Karab80697c2008-03-04 14:14:05 +0100878 name = kmalloc(UDF_NAME_LEN, GFP_NOFS);
879 if (!name) {
880 err = -ENOMEM;
881 goto out_no_entry;
882 }
883
Linus Torvalds1da177e2005-04-16 15:20:36 -0700884 inode->i_data.a_ops = &udf_symlink_aops;
Dmitry Monakhovc15d0fc2010-03-29 11:05:21 +0400885 inode->i_op = &udf_symlink_inode_operations;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700886
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800887 if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200888 struct kernel_lb_addr eloc;
Harvey Harrison78e917d2008-04-28 02:16:19 -0700889 uint32_t bsize;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700890
Jan Karad664b6a2010-10-20 18:28:46 +0200891 block = udf_new_block(sb, inode,
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800892 iinfo->i_location.partitionReferenceNum,
893 iinfo->i_location.logicalBlockNum, &err);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700894 if (!block)
895 goto out_no_entry;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800896 epos.block = iinfo->i_location;
Jan Karaff116fc2007-05-08 00:35:14 -0700897 epos.offset = udf_file_entry_alloc_offset(inode);
898 epos.bh = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700899 eloc.logicalBlockNum = block;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800900 eloc.partitionReferenceNum =
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800901 iinfo->i_location.partitionReferenceNum;
Jan Karad664b6a2010-10-20 18:28:46 +0200902 bsize = sb->s_blocksize;
Harvey Harrison78e917d2008-04-28 02:16:19 -0700903 iinfo->i_lenExtents = bsize;
Pekka Enberg97e961f2008-10-15 12:29:03 +0200904 udf_add_aext(inode, &epos, &eloc, bsize, 0);
Jan Kara3bf25cb2007-05-08 00:35:16 -0700905 brelse(epos.bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700906
Jan Karad664b6a2010-10-20 18:28:46 +0200907 block = udf_get_pblock(sb, block,
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800908 iinfo->i_location.partitionReferenceNum,
Marcin Slusarz4b111112008-02-08 04:20:36 -0800909 0);
Jan Karad664b6a2010-10-20 18:28:46 +0200910 epos.bh = udf_tgetblk(sb, block);
Jan Karaff116fc2007-05-08 00:35:14 -0700911 lock_buffer(epos.bh);
Jan Karad664b6a2010-10-20 18:28:46 +0200912 memset(epos.bh->b_data, 0x00, bsize);
Jan Karaff116fc2007-05-08 00:35:14 -0700913 set_buffer_uptodate(epos.bh);
914 unlock_buffer(epos.bh);
915 mark_buffer_dirty_inode(epos.bh, inode);
916 ea = epos.bh->b_data + udf_ext0_offset(inode);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800917 } else
918 ea = iinfo->i_ext.i_data + iinfo->i_lenEAttr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700919
Jan Karad664b6a2010-10-20 18:28:46 +0200920 eoffset = sb->s_blocksize - udf_ext0_offset(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700921 pc = (struct pathComponent *)ea;
922
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700923 if (*symname == '/') {
924 do {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700925 symname++;
926 } while (*symname == '/');
927
928 pc->componentType = 1;
929 pc->lengthComponentIdent = 0;
930 pc->componentFileVersionNum = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700931 elen += sizeof(struct pathComponent);
932 }
933
934 err = -ENAMETOOLONG;
935
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700936 while (*symname) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700937 if (elen + sizeof(struct pathComponent) > eoffset)
938 goto out_no_entry;
939
940 pc = (struct pathComponent *)(ea + elen);
941
Al Viro391e8bb2010-01-31 21:28:48 -0500942 compstart = symname;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700943
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700944 do {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700945 symname++;
946 } while (*symname && *symname != '/');
947
948 pc->componentType = 5;
949 pc->lengthComponentIdent = 0;
950 pc->componentFileVersionNum = 0;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700951 if (compstart[0] == '.') {
952 if ((symname - compstart) == 1)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700953 pc->componentType = 4;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800954 else if ((symname - compstart) == 2 &&
955 compstart[1] == '.')
Linus Torvalds1da177e2005-04-16 15:20:36 -0700956 pc->componentType = 3;
957 }
958
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700959 if (pc->componentType == 5) {
Jan Karad664b6a2010-10-20 18:28:46 +0200960 namelen = udf_put_filename(sb, compstart, name,
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700961 symname - compstart);
962 if (!namelen)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700963 goto out_no_entry;
964
Marcin Slusarz4b111112008-02-08 04:20:36 -0800965 if (elen + sizeof(struct pathComponent) + namelen >
966 eoffset)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700967 goto out_no_entry;
968 else
969 pc->lengthComponentIdent = namelen;
970
971 memcpy(pc->componentIdent, name, namelen);
972 }
973
974 elen += sizeof(struct pathComponent) + pc->lengthComponentIdent;
975
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700976 if (*symname) {
977 do {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700978 symname++;
979 } while (*symname == '/');
980 }
981 }
982
Jan Kara3bf25cb2007-05-08 00:35:16 -0700983 brelse(epos.bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700984 inode->i_size = elen;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800985 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
986 iinfo->i_lenAlloc = inode->i_size;
Jan Kara2c948b32009-12-03 13:39:28 +0100987 else
988 udf_truncate_tail_extent(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700989 mark_inode_dirty(inode);
990
Marcin Slusarz4b111112008-02-08 04:20:36 -0800991 fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
992 if (!fi)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700993 goto out_no_entry;
Jan Karad664b6a2010-10-20 18:28:46 +0200994 cfi.icb.extLength = cpu_to_le32(sb->s_blocksize);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800995 cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location);
Jan Karad664b6a2010-10-20 18:28:46 +0200996 if (UDF_SB(inode->i_sb)->s_lvid_bh) {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700997 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
Jan Karad664b6a2010-10-20 18:28:46 +0200998 cpu_to_le32(lvid_get_unique_id(sb));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700999 }
1000 udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
Marcin Slusarzc0b34432008-02-08 04:20:42 -08001001 if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001002 mark_inode_dirty(dir);
Alessio Igor Bogani4d0fb622010-11-16 18:40:47 +01001003 up_write(&iinfo->i_data_sem);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001004 if (fibh.sbh != fibh.ebh)
Jan Kara3bf25cb2007-05-08 00:35:16 -07001005 brelse(fibh.ebh);
1006 brelse(fibh.sbh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001007 d_instantiate(dentry, inode);
1008 err = 0;
1009
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001010out:
Jan Karab80697c2008-03-04 14:14:05 +01001011 kfree(name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001012 return err;
1013
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001014out_no_entry:
Alessio Igor Bogani4d0fb622010-11-16 18:40:47 +01001015 up_write(&iinfo->i_data_sem);
Dave Hansen9a53c3a2006-09-30 23:29:03 -07001016 inode_dec_link_count(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001017 iput(inode);
1018 goto out;
1019}
1020
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001021static int udf_link(struct dentry *old_dentry, struct inode *dir,
1022 struct dentry *dentry)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001023{
1024 struct inode *inode = old_dentry->d_inode;
1025 struct udf_fileident_bh fibh;
1026 struct fileIdentDesc cfi, *fi;
1027 int err;
1028
Marcin Slusarz4b111112008-02-08 04:20:36 -08001029 fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
1030 if (!fi) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001031 return err;
1032 }
1033 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
Marcin Slusarzc0b34432008-02-08 04:20:42 -08001034 cfi.icb.extLocation = cpu_to_lelb(UDF_I(inode)->i_location);
Jan Karad664b6a2010-10-20 18:28:46 +02001035 if (UDF_SB(inode->i_sb)->s_lvid_bh) {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001036 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
Jan Karad664b6a2010-10-20 18:28:46 +02001037 cpu_to_le32(lvid_get_unique_id(inode->i_sb));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001038 }
1039 udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
Marcin Slusarzc0b34432008-02-08 04:20:42 -08001040 if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001041 mark_inode_dirty(dir);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001042
Linus Torvalds1da177e2005-04-16 15:20:36 -07001043 if (fibh.sbh != fibh.ebh)
Jan Kara3bf25cb2007-05-08 00:35:16 -07001044 brelse(fibh.ebh);
1045 brelse(fibh.sbh);
Dave Hansend8c76e62006-09-30 23:29:04 -07001046 inc_nlink(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001047 inode->i_ctime = current_fs_time(inode->i_sb);
1048 mark_inode_dirty(inode);
Al Viro7de9c6ee2010-10-23 11:11:40 -04001049 ihold(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001050 d_instantiate(dentry, inode);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001051
Linus Torvalds1da177e2005-04-16 15:20:36 -07001052 return 0;
1053}
1054
1055/* Anybody can rename anything with this: the permission checks are left to the
1056 * higher-level routines.
1057 */
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001058static int udf_rename(struct inode *old_dir, struct dentry *old_dentry,
1059 struct inode *new_dir, struct dentry *new_dentry)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001060{
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001061 struct inode *old_inode = old_dentry->d_inode;
1062 struct inode *new_inode = new_dentry->d_inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001063 struct udf_fileident_bh ofibh, nfibh;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001064 struct fileIdentDesc *ofi = NULL, *nfi = NULL, *dir_fi = NULL;
1065 struct fileIdentDesc ocfi, ncfi;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001066 struct buffer_head *dir_bh = NULL;
1067 int retval = -ENOENT;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001068 struct kernel_lb_addr tloc;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001069 struct udf_inode_info *old_iinfo = UDF_I(old_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001070
Al Viro9fbb76c2008-10-12 00:15:17 -04001071 ofi = udf_find_entry(old_dir, &old_dentry->d_name, &ofibh, &ocfi);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001072 if (ofi) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001073 if (ofibh.sbh != ofibh.ebh)
Jan Kara3bf25cb2007-05-08 00:35:16 -07001074 brelse(ofibh.ebh);
1075 brelse(ofibh.sbh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001076 }
1077 tloc = lelb_to_cpu(ocfi.icb.extLocation);
Pekka Enberg97e961f2008-10-15 12:29:03 +02001078 if (!ofi || udf_get_lb_pblock(old_dir->i_sb, &tloc, 0)
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001079 != old_inode->i_ino)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001080 goto end_rename;
1081
Al Viro9fbb76c2008-10-12 00:15:17 -04001082 nfi = udf_find_entry(new_dir, &new_dentry->d_name, &nfibh, &ncfi);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001083 if (nfi) {
1084 if (!new_inode) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001085 if (nfibh.sbh != nfibh.ebh)
Jan Kara3bf25cb2007-05-08 00:35:16 -07001086 brelse(nfibh.ebh);
1087 brelse(nfibh.sbh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001088 nfi = NULL;
1089 }
1090 }
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001091 if (S_ISDIR(old_inode->i_mode)) {
Marcin Slusarz7f3fbd02008-02-08 04:20:49 -08001092 int offset = udf_ext0_offset(old_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001093
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001094 if (new_inode) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001095 retval = -ENOTEMPTY;
1096 if (!empty_dir(new_inode))
1097 goto end_rename;
1098 }
1099 retval = -EIO;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001100 if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001101 dir_fi = udf_get_fileident(
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001102 old_iinfo->i_ext.i_data -
1103 (old_iinfo->i_efe ?
Marcin Slusarz4b111112008-02-08 04:20:36 -08001104 sizeof(struct extendedFileEntry) :
1105 sizeof(struct fileEntry)),
1106 old_inode->i_sb->s_blocksize, &offset);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001107 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001108 dir_bh = udf_bread(old_inode, 0, 0, &retval);
1109 if (!dir_bh)
1110 goto end_rename;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001111 dir_fi = udf_get_fileident(dir_bh->b_data,
1112 old_inode->i_sb->s_blocksize, &offset);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001113 }
1114 if (!dir_fi)
1115 goto end_rename;
1116 tloc = lelb_to_cpu(dir_fi->icb.extLocation);
Pekka Enberg97e961f2008-10-15 12:29:03 +02001117 if (udf_get_lb_pblock(old_inode->i_sb, &tloc, 0) !=
Marcin Slusarz4b111112008-02-08 04:20:36 -08001118 old_dir->i_ino)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001119 goto end_rename;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001120 }
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001121 if (!nfi) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001122 nfi = udf_add_entry(new_dir, new_dentry, &nfibh, &ncfi,
1123 &retval);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001124 if (!nfi)
1125 goto end_rename;
1126 }
1127
1128 /*
1129 * Like most other Unix systems, set the ctime for inodes on a
1130 * rename.
1131 */
1132 old_inode->i_ctime = current_fs_time(old_inode->i_sb);
1133 mark_inode_dirty(old_inode);
1134
1135 /*
1136 * ok, that's it
1137 */
1138 ncfi.fileVersionNum = ocfi.fileVersionNum;
1139 ncfi.fileCharacteristics = ocfi.fileCharacteristics;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001140 memcpy(&(ncfi.icb), &(ocfi.icb), sizeof(struct long_ad));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001141 udf_write_fi(new_dir, &ncfi, nfi, &nfibh, NULL, NULL);
1142
1143 /* The old fid may have moved - find it again */
Al Viro9fbb76c2008-10-12 00:15:17 -04001144 ofi = udf_find_entry(old_dir, &old_dentry->d_name, &ofibh, &ocfi);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001145 udf_delete_entry(old_dir, ofi, &ofibh, &ocfi);
1146
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001147 if (new_inode) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001148 new_inode->i_ctime = current_fs_time(new_inode->i_sb);
Dave Hansen9a53c3a2006-09-30 23:29:03 -07001149 inode_dec_link_count(new_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001150 }
1151 old_dir->i_ctime = old_dir->i_mtime = current_fs_time(old_dir->i_sb);
1152 mark_inode_dirty(old_dir);
1153
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001154 if (dir_fi) {
Marcin Slusarzc0b34432008-02-08 04:20:42 -08001155 dir_fi->icb.extLocation = cpu_to_lelb(UDF_I(new_dir)->i_location);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001156 udf_update_tag((char *)dir_fi,
1157 (sizeof(struct fileIdentDesc) +
1158 le16_to_cpu(dir_fi->lengthOfImpUse) + 3) & ~3);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001159 if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001160 mark_inode_dirty(old_inode);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001161 else
Linus Torvalds1da177e2005-04-16 15:20:36 -07001162 mark_buffer_dirty_inode(dir_bh, old_inode);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001163
Dave Hansen9a53c3a2006-09-30 23:29:03 -07001164 inode_dec_link_count(old_dir);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001165 if (new_inode)
Dave Hansen9a53c3a2006-09-30 23:29:03 -07001166 inode_dec_link_count(new_inode);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001167 else {
Dave Hansend8c76e62006-09-30 23:29:04 -07001168 inc_nlink(new_dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001169 mark_inode_dirty(new_dir);
1170 }
1171 }
1172
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001173 if (ofi) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001174 if (ofibh.sbh != ofibh.ebh)
Jan Kara3bf25cb2007-05-08 00:35:16 -07001175 brelse(ofibh.ebh);
1176 brelse(ofibh.sbh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001177 }
1178
1179 retval = 0;
1180
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001181end_rename:
Jan Kara3bf25cb2007-05-08 00:35:16 -07001182 brelse(dir_bh);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001183 if (nfi) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001184 if (nfibh.sbh != nfibh.ebh)
Jan Kara3bf25cb2007-05-08 00:35:16 -07001185 brelse(nfibh.ebh);
1186 brelse(nfibh.sbh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001187 }
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001188
Linus Torvalds1da177e2005-04-16 15:20:36 -07001189 return retval;
1190}
1191
Rasmus Rohde221e5832008-04-30 17:22:06 +02001192static struct dentry *udf_get_parent(struct dentry *child)
1193{
Pekka Enberg97e961f2008-10-15 12:29:03 +02001194 struct kernel_lb_addr tloc;
Rasmus Rohde221e5832008-04-30 17:22:06 +02001195 struct inode *inode = NULL;
Linus Torvalds26fe5752012-05-10 13:14:12 -07001196 struct qstr dotdot = QSTR_INIT("..", 2);
Rasmus Rohde221e5832008-04-30 17:22:06 +02001197 struct fileIdentDesc cfi;
1198 struct udf_fileident_bh fibh;
1199
Rasmus Rohde221e5832008-04-30 17:22:06 +02001200 if (!udf_find_entry(child->d_inode, &dotdot, &fibh, &cfi))
1201 goto out_unlock;
1202
1203 if (fibh.sbh != fibh.ebh)
1204 brelse(fibh.ebh);
1205 brelse(fibh.sbh);
1206
Pekka Enberg97e961f2008-10-15 12:29:03 +02001207 tloc = lelb_to_cpu(cfi.icb.extLocation);
1208 inode = udf_iget(child->d_inode->i_sb, &tloc);
Rasmus Rohde221e5832008-04-30 17:22:06 +02001209 if (!inode)
1210 goto out_unlock;
Rasmus Rohde221e5832008-04-30 17:22:06 +02001211
Christoph Hellwig44003722008-08-11 15:49:04 +02001212 return d_obtain_alias(inode);
Rasmus Rohde221e5832008-04-30 17:22:06 +02001213out_unlock:
Rasmus Rohde221e5832008-04-30 17:22:06 +02001214 return ERR_PTR(-EACCES);
1215}
1216
1217
1218static struct dentry *udf_nfs_get_inode(struct super_block *sb, u32 block,
1219 u16 partref, __u32 generation)
1220{
1221 struct inode *inode;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001222 struct kernel_lb_addr loc;
Rasmus Rohde221e5832008-04-30 17:22:06 +02001223
1224 if (block == 0)
1225 return ERR_PTR(-ESTALE);
1226
1227 loc.logicalBlockNum = block;
1228 loc.partitionReferenceNum = partref;
Pekka Enberg97e961f2008-10-15 12:29:03 +02001229 inode = udf_iget(sb, &loc);
Rasmus Rohde221e5832008-04-30 17:22:06 +02001230
1231 if (inode == NULL)
1232 return ERR_PTR(-ENOMEM);
1233
1234 if (generation && inode->i_generation != generation) {
1235 iput(inode);
1236 return ERR_PTR(-ESTALE);
1237 }
Christoph Hellwig44003722008-08-11 15:49:04 +02001238 return d_obtain_alias(inode);
Rasmus Rohde221e5832008-04-30 17:22:06 +02001239}
1240
1241static struct dentry *udf_fh_to_dentry(struct super_block *sb,
1242 struct fid *fid, int fh_len, int fh_type)
1243{
1244 if ((fh_len != 3 && fh_len != 5) ||
1245 (fh_type != FILEID_UDF_WITH_PARENT &&
1246 fh_type != FILEID_UDF_WITHOUT_PARENT))
1247 return NULL;
1248
1249 return udf_nfs_get_inode(sb, fid->udf.block, fid->udf.partref,
1250 fid->udf.generation);
1251}
1252
1253static struct dentry *udf_fh_to_parent(struct super_block *sb,
1254 struct fid *fid, int fh_len, int fh_type)
1255{
1256 if (fh_len != 5 || fh_type != FILEID_UDF_WITH_PARENT)
1257 return NULL;
1258
1259 return udf_nfs_get_inode(sb, fid->udf.parent_block,
1260 fid->udf.parent_partref,
1261 fid->udf.parent_generation);
1262}
Al Virob0b03822012-04-02 14:34:06 -04001263static int udf_encode_fh(struct inode *inode, __u32 *fh, int *lenp,
1264 struct inode *parent)
Rasmus Rohde221e5832008-04-30 17:22:06 +02001265{
1266 int len = *lenp;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001267 struct kernel_lb_addr location = UDF_I(inode)->i_location;
Rasmus Rohde221e5832008-04-30 17:22:06 +02001268 struct fid *fid = (struct fid *)fh;
1269 int type = FILEID_UDF_WITHOUT_PARENT;
1270
Al Virob0b03822012-04-02 14:34:06 -04001271 if (parent && (len < 5)) {
Aneesh Kumar K.V5fe0c232011-01-29 18:43:25 +05301272 *lenp = 5;
Rasmus Rohde221e5832008-04-30 17:22:06 +02001273 return 255;
Aneesh Kumar K.V5fe0c232011-01-29 18:43:25 +05301274 } else if (len < 3) {
1275 *lenp = 3;
1276 return 255;
1277 }
Rasmus Rohde221e5832008-04-30 17:22:06 +02001278
1279 *lenp = 3;
1280 fid->udf.block = location.logicalBlockNum;
1281 fid->udf.partref = location.partitionReferenceNum;
Mathias Krause0143fc52012-07-12 08:46:55 +02001282 fid->udf.parent_partref = 0;
Rasmus Rohde221e5832008-04-30 17:22:06 +02001283 fid->udf.generation = inode->i_generation;
1284
Al Virob0b03822012-04-02 14:34:06 -04001285 if (parent) {
1286 location = UDF_I(parent)->i_location;
Rasmus Rohde221e5832008-04-30 17:22:06 +02001287 fid->udf.parent_block = location.logicalBlockNum;
1288 fid->udf.parent_partref = location.partitionReferenceNum;
1289 fid->udf.parent_generation = inode->i_generation;
Rasmus Rohde221e5832008-04-30 17:22:06 +02001290 *lenp = 5;
1291 type = FILEID_UDF_WITH_PARENT;
1292 }
1293
1294 return type;
1295}
1296
1297const struct export_operations udf_export_ops = {
1298 .encode_fh = udf_encode_fh,
1299 .fh_to_dentry = udf_fh_to_dentry,
1300 .fh_to_parent = udf_fh_to_parent,
1301 .get_parent = udf_get_parent,
1302};
1303
Arjan van de Venc5ef1c42007-02-12 00:55:40 -08001304const struct inode_operations udf_dir_inode_operations = {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001305 .lookup = udf_lookup,
1306 .create = udf_create,
1307 .link = udf_link,
1308 .unlink = udf_unlink,
1309 .symlink = udf_symlink,
1310 .mkdir = udf_mkdir,
1311 .rmdir = udf_rmdir,
1312 .mknod = udf_mknod,
1313 .rename = udf_rename,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001314};
Dmitry Monakhovc15d0fc2010-03-29 11:05:21 +04001315const struct inode_operations udf_symlink_inode_operations = {
1316 .readlink = generic_readlink,
1317 .follow_link = page_follow_link_light,
1318 .put_link = page_put_link,
Dmitry Monakhovc15d0fc2010-03-29 11:05:21 +04001319};