blob: 9737cba1357d754f4b1ea8927af83326865b8e54 [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 Viro656d09d2013-06-12 09:35:33 +0400597static int udf_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode)
598{
599 struct inode *inode;
600 struct udf_inode_info *iinfo;
601 int err;
602
603 inode = udf_new_inode(dir, mode, &err);
604 if (!inode)
605 return err;
606
607 iinfo = UDF_I(inode);
608 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
609 inode->i_data.a_ops = &udf_adinicb_aops;
610 else
611 inode->i_data.a_ops = &udf_aops;
612 inode->i_op = &udf_file_inode_operations;
613 inode->i_fop = &udf_file_operations;
614 mark_inode_dirty(inode);
615
616 d_tmpfile(dentry, inode);
617 return 0;
618}
619
Al Viro1a67aaf2011-07-26 01:52:52 -0400620static int udf_mknod(struct inode *dir, struct dentry *dentry, umode_t mode,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700621 dev_t rdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700622{
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700623 struct inode *inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700624 struct udf_fileident_bh fibh;
625 struct fileIdentDesc cfi, *fi;
626 int err;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800627 struct udf_inode_info *iinfo;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700628
629 if (!old_valid_dev(rdev))
630 return -EINVAL;
631
Linus Torvalds1da177e2005-04-16 15:20:36 -0700632 err = -EIO;
633 inode = udf_new_inode(dir, mode, &err);
634 if (!inode)
635 goto out;
636
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800637 iinfo = UDF_I(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700638 init_special_inode(inode, mode, rdev);
Marcin Slusarz4b111112008-02-08 04:20:36 -0800639 fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
640 if (!fi) {
Miklos Szeredi6d6b77f2011-10-28 14:13:28 +0200641 inode_dec_link_count(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700642 iput(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700643 return err;
644 }
645 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800646 cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700647 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800648 cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700649 udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
Marcin Slusarzc0b34432008-02-08 04:20:42 -0800650 if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700651 mark_inode_dirty(dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700652 mark_inode_dirty(inode);
653
654 if (fibh.sbh != fibh.ebh)
Jan Kara3bf25cb2007-05-08 00:35:16 -0700655 brelse(fibh.ebh);
656 brelse(fibh.sbh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700657 d_instantiate(dentry, inode);
658 err = 0;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700659
660out:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700661 return err;
662}
663
Al Viro18bb1db2011-07-26 01:41:39 -0400664static int udf_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700665{
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700666 struct inode *inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700667 struct udf_fileident_bh fibh;
668 struct fileIdentDesc cfi, *fi;
669 int err;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800670 struct udf_inode_info *dinfo = UDF_I(dir);
671 struct udf_inode_info *iinfo;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700672
Linus Torvalds1da177e2005-04-16 15:20:36 -0700673 err = -EIO;
Dmitry Monakhova6c5a032010-03-04 17:32:22 +0300674 inode = udf_new_inode(dir, S_IFDIR | mode, &err);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700675 if (!inode)
676 goto out;
677
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800678 iinfo = UDF_I(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700679 inode->i_op = &udf_dir_inode_operations;
680 inode->i_fop = &udf_dir_operations;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800681 fi = udf_add_entry(inode, NULL, &fibh, &cfi, &err);
682 if (!fi) {
Miklos Szeredi6d6b77f2011-10-28 14:13:28 +0200683 inode_dec_link_count(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700684 iput(inode);
685 goto out;
686 }
Miklos Szeredibfe86842011-10-28 14:13:29 +0200687 set_nlink(inode, 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700688 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800689 cfi.icb.extLocation = cpu_to_lelb(dinfo->i_location);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700690 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800691 cpu_to_le32(dinfo->i_unique & 0x00000000FFFFFFFFUL);
Marcin Slusarz4b111112008-02-08 04:20:36 -0800692 cfi.fileCharacteristics =
693 FID_FILE_CHAR_DIRECTORY | FID_FILE_CHAR_PARENT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700694 udf_write_fi(inode, &cfi, fi, &fibh, NULL, NULL);
Jan Kara3bf25cb2007-05-08 00:35:16 -0700695 brelse(fibh.sbh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700696 mark_inode_dirty(inode);
697
Marcin Slusarz4b111112008-02-08 04:20:36 -0800698 fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
699 if (!fi) {
Miklos Szeredi6d6b77f2011-10-28 14:13:28 +0200700 clear_nlink(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700701 mark_inode_dirty(inode);
702 iput(inode);
703 goto out;
704 }
705 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800706 cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700707 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800708 cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700709 cfi.fileCharacteristics |= FID_FILE_CHAR_DIRECTORY;
710 udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
Dave Hansend8c76e62006-09-30 23:29:04 -0700711 inc_nlink(dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700712 mark_inode_dirty(dir);
713 d_instantiate(dentry, inode);
714 if (fibh.sbh != fibh.ebh)
Jan Kara3bf25cb2007-05-08 00:35:16 -0700715 brelse(fibh.ebh);
716 brelse(fibh.sbh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700717 err = 0;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700718
719out:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700720 return err;
721}
722
723static int empty_dir(struct inode *dir)
724{
725 struct fileIdentDesc *fi, cfi;
726 struct udf_fileident_bh fibh;
727 loff_t f_pos;
Jan Karaaf793292008-02-08 04:20:50 -0800728 loff_t size = udf_ext0_offset(dir) + dir->i_size;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700729 int block;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200730 struct kernel_lb_addr eloc;
Jan Karaff116fc2007-05-08 00:35:14 -0700731 uint32_t elen;
Jan Kara60448b12007-05-08 00:35:13 -0700732 sector_t offset;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700733 struct extent_position epos = {};
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800734 struct udf_inode_info *dinfo = UDF_I(dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700735
Jan Karaaf793292008-02-08 04:20:50 -0800736 f_pos = udf_ext0_offset(dir);
737 fibh.soffset = fibh.eoffset = f_pos & (dir->i_sb->s_blocksize - 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700738
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800739 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700740 fibh.sbh = fibh.ebh = NULL;
Jan Karaaf793292008-02-08 04:20:50 -0800741 else if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits,
Marcin Slusarz4b111112008-02-08 04:20:36 -0800742 &epos, &eloc, &elen, &offset) ==
743 (EXT_RECORDED_ALLOCATED >> 30)) {
Pekka Enberg97e961f2008-10-15 12:29:03 +0200744 block = udf_get_lb_pblock(dir->i_sb, &eloc, offset);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700745 if ((++offset << dir->i_sb->s_blocksize_bits) < elen) {
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800746 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200747 epos.offset -= sizeof(struct short_ad);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800748 else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200749 epos.offset -= sizeof(struct long_ad);
Marcin Slusarz4b111112008-02-08 04:20:36 -0800750 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700751 offset = 0;
752
Marcin Slusarz4b111112008-02-08 04:20:36 -0800753 fibh.sbh = fibh.ebh = udf_tread(dir->i_sb, block);
754 if (!fibh.sbh) {
Jan Kara3bf25cb2007-05-08 00:35:16 -0700755 brelse(epos.bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700756 return 0;
757 }
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700758 } else {
Jan Kara3bf25cb2007-05-08 00:35:16 -0700759 brelse(epos.bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700760 return 0;
761 }
762
Jan Karaaf793292008-02-08 04:20:50 -0800763 while (f_pos < size) {
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700764 fi = udf_fileident_read(dir, &f_pos, &fibh, &cfi, &epos, &eloc,
765 &elen, &offset);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700766 if (!fi) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700767 if (fibh.sbh != fibh.ebh)
Jan Kara3bf25cb2007-05-08 00:35:16 -0700768 brelse(fibh.ebh);
769 brelse(fibh.sbh);
770 brelse(epos.bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700771 return 0;
772 }
773
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700774 if (cfi.lengthFileIdent &&
775 (cfi.fileCharacteristics & FID_FILE_CHAR_DELETED) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700776 if (fibh.sbh != fibh.ebh)
Jan Kara3bf25cb2007-05-08 00:35:16 -0700777 brelse(fibh.ebh);
778 brelse(fibh.sbh);
779 brelse(epos.bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700780 return 0;
781 }
782 }
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700783
Linus Torvalds1da177e2005-04-16 15:20:36 -0700784 if (fibh.sbh != fibh.ebh)
Jan Kara3bf25cb2007-05-08 00:35:16 -0700785 brelse(fibh.ebh);
786 brelse(fibh.sbh);
787 brelse(epos.bh);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700788
Linus Torvalds1da177e2005-04-16 15:20:36 -0700789 return 1;
790}
791
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700792static int udf_rmdir(struct inode *dir, struct dentry *dentry)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700793{
794 int retval;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700795 struct inode *inode = dentry->d_inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700796 struct udf_fileident_bh fibh;
797 struct fileIdentDesc *fi, cfi;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200798 struct kernel_lb_addr tloc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700799
800 retval = -ENOENT;
Al Viro9fbb76c2008-10-12 00:15:17 -0400801 fi = udf_find_entry(dir, &dentry->d_name, &fibh, &cfi);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700802 if (!fi)
803 goto out;
804
805 retval = -EIO;
806 tloc = lelb_to_cpu(cfi.icb.extLocation);
Pekka Enberg97e961f2008-10-15 12:29:03 +0200807 if (udf_get_lb_pblock(dir->i_sb, &tloc, 0) != inode->i_ino)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700808 goto end_rmdir;
809 retval = -ENOTEMPTY;
810 if (!empty_dir(inode))
811 goto end_rmdir;
812 retval = udf_delete_entry(dir, fi, &fibh, &cfi);
813 if (retval)
814 goto end_rmdir;
815 if (inode->i_nlink != 2)
Joe Perchesa40ecd72011-10-10 01:08:04 -0700816 udf_warn(inode->i_sb, "empty directory has nlink != 2 (%d)\n",
817 inode->i_nlink);
Dave Hansence71ec32006-09-30 23:29:06 -0700818 clear_nlink(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700819 inode->i_size = 0;
Stephen Mollettc007c062007-05-08 00:31:31 -0700820 inode_dec_link_count(dir);
Marcin Slusarz4b111112008-02-08 04:20:36 -0800821 inode->i_ctime = dir->i_ctime = dir->i_mtime =
822 current_fs_time(dir->i_sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700823 mark_inode_dirty(dir);
824
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700825end_rmdir:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700826 if (fibh.sbh != fibh.ebh)
Jan Kara3bf25cb2007-05-08 00:35:16 -0700827 brelse(fibh.ebh);
828 brelse(fibh.sbh);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700829
830out:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700831 return retval;
832}
833
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700834static int udf_unlink(struct inode *dir, struct dentry *dentry)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700835{
836 int retval;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700837 struct inode *inode = dentry->d_inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700838 struct udf_fileident_bh fibh;
839 struct fileIdentDesc *fi;
840 struct fileIdentDesc cfi;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200841 struct kernel_lb_addr tloc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700842
843 retval = -ENOENT;
Al Viro9fbb76c2008-10-12 00:15:17 -0400844 fi = udf_find_entry(dir, &dentry->d_name, &fibh, &cfi);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700845 if (!fi)
846 goto out;
847
848 retval = -EIO;
849 tloc = lelb_to_cpu(cfi.icb.extLocation);
Pekka Enberg97e961f2008-10-15 12:29:03 +0200850 if (udf_get_lb_pblock(dir->i_sb, &tloc, 0) != inode->i_ino)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700851 goto end_unlink;
852
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700853 if (!inode->i_nlink) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700854 udf_debug("Deleting nonexistent file (%lu), %d\n",
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700855 inode->i_ino, inode->i_nlink);
Miklos Szeredibfe86842011-10-28 14:13:29 +0200856 set_nlink(inode, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700857 }
858 retval = udf_delete_entry(dir, fi, &fibh, &cfi);
859 if (retval)
860 goto end_unlink;
861 dir->i_ctime = dir->i_mtime = current_fs_time(dir->i_sb);
862 mark_inode_dirty(dir);
Dave Hansen9a53c3a2006-09-30 23:29:03 -0700863 inode_dec_link_count(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700864 inode->i_ctime = dir->i_ctime;
865 retval = 0;
866
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700867end_unlink:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700868 if (fibh.sbh != fibh.ebh)
Jan Kara3bf25cb2007-05-08 00:35:16 -0700869 brelse(fibh.ebh);
870 brelse(fibh.sbh);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700871
872out:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700873 return retval;
874}
875
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700876static int udf_symlink(struct inode *dir, struct dentry *dentry,
877 const char *symname)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700878{
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700879 struct inode *inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700880 struct pathComponent *pc;
Al Viro391e8bb2010-01-31 21:28:48 -0500881 const char *compstart;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700882 struct udf_fileident_bh fibh;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700883 struct extent_position epos = {};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700884 int eoffset, elen = 0;
885 struct fileIdentDesc *fi;
886 struct fileIdentDesc cfi;
Al Viro391e8bb2010-01-31 21:28:48 -0500887 uint8_t *ea;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700888 int err;
889 int block;
Al Viro391e8bb2010-01-31 21:28:48 -0500890 unsigned char *name = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700891 int namelen;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800892 struct udf_inode_info *iinfo;
Jan Karad664b6a2010-10-20 18:28:46 +0200893 struct super_block *sb = dir->i_sb;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700894
Dmitry Monakhova6c5a032010-03-04 17:32:22 +0300895 inode = udf_new_inode(dir, S_IFLNK | S_IRWXUGO, &err);
Marcin Slusarz4b111112008-02-08 04:20:36 -0800896 if (!inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700897 goto out;
898
Alessio Igor Bogani4d0fb622010-11-16 18:40:47 +0100899 iinfo = UDF_I(inode);
900 down_write(&iinfo->i_data_sem);
Jan Karab80697c2008-03-04 14:14:05 +0100901 name = kmalloc(UDF_NAME_LEN, GFP_NOFS);
902 if (!name) {
903 err = -ENOMEM;
904 goto out_no_entry;
905 }
906
Linus Torvalds1da177e2005-04-16 15:20:36 -0700907 inode->i_data.a_ops = &udf_symlink_aops;
Dmitry Monakhovc15d0fc2010-03-29 11:05:21 +0400908 inode->i_op = &udf_symlink_inode_operations;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700909
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800910 if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200911 struct kernel_lb_addr eloc;
Harvey Harrison78e917d2008-04-28 02:16:19 -0700912 uint32_t bsize;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700913
Jan Karad664b6a2010-10-20 18:28:46 +0200914 block = udf_new_block(sb, inode,
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800915 iinfo->i_location.partitionReferenceNum,
916 iinfo->i_location.logicalBlockNum, &err);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700917 if (!block)
918 goto out_no_entry;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800919 epos.block = iinfo->i_location;
Jan Karaff116fc2007-05-08 00:35:14 -0700920 epos.offset = udf_file_entry_alloc_offset(inode);
921 epos.bh = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700922 eloc.logicalBlockNum = block;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800923 eloc.partitionReferenceNum =
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800924 iinfo->i_location.partitionReferenceNum;
Jan Karad664b6a2010-10-20 18:28:46 +0200925 bsize = sb->s_blocksize;
Harvey Harrison78e917d2008-04-28 02:16:19 -0700926 iinfo->i_lenExtents = bsize;
Pekka Enberg97e961f2008-10-15 12:29:03 +0200927 udf_add_aext(inode, &epos, &eloc, bsize, 0);
Jan Kara3bf25cb2007-05-08 00:35:16 -0700928 brelse(epos.bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700929
Jan Karad664b6a2010-10-20 18:28:46 +0200930 block = udf_get_pblock(sb, block,
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800931 iinfo->i_location.partitionReferenceNum,
Marcin Slusarz4b111112008-02-08 04:20:36 -0800932 0);
Jan Karad664b6a2010-10-20 18:28:46 +0200933 epos.bh = udf_tgetblk(sb, block);
Jan Karaff116fc2007-05-08 00:35:14 -0700934 lock_buffer(epos.bh);
Jan Karad664b6a2010-10-20 18:28:46 +0200935 memset(epos.bh->b_data, 0x00, bsize);
Jan Karaff116fc2007-05-08 00:35:14 -0700936 set_buffer_uptodate(epos.bh);
937 unlock_buffer(epos.bh);
938 mark_buffer_dirty_inode(epos.bh, inode);
939 ea = epos.bh->b_data + udf_ext0_offset(inode);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800940 } else
941 ea = iinfo->i_ext.i_data + iinfo->i_lenEAttr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700942
Jan Karad664b6a2010-10-20 18:28:46 +0200943 eoffset = sb->s_blocksize - udf_ext0_offset(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700944 pc = (struct pathComponent *)ea;
945
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700946 if (*symname == '/') {
947 do {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700948 symname++;
949 } while (*symname == '/');
950
951 pc->componentType = 1;
952 pc->lengthComponentIdent = 0;
953 pc->componentFileVersionNum = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700954 elen += sizeof(struct pathComponent);
955 }
956
957 err = -ENAMETOOLONG;
958
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700959 while (*symname) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700960 if (elen + sizeof(struct pathComponent) > eoffset)
961 goto out_no_entry;
962
963 pc = (struct pathComponent *)(ea + elen);
964
Al Viro391e8bb2010-01-31 21:28:48 -0500965 compstart = symname;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700966
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700967 do {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700968 symname++;
969 } while (*symname && *symname != '/');
970
971 pc->componentType = 5;
972 pc->lengthComponentIdent = 0;
973 pc->componentFileVersionNum = 0;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700974 if (compstart[0] == '.') {
975 if ((symname - compstart) == 1)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700976 pc->componentType = 4;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800977 else if ((symname - compstart) == 2 &&
978 compstart[1] == '.')
Linus Torvalds1da177e2005-04-16 15:20:36 -0700979 pc->componentType = 3;
980 }
981
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700982 if (pc->componentType == 5) {
Jan Karad664b6a2010-10-20 18:28:46 +0200983 namelen = udf_put_filename(sb, compstart, name,
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700984 symname - compstart);
985 if (!namelen)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700986 goto out_no_entry;
987
Marcin Slusarz4b111112008-02-08 04:20:36 -0800988 if (elen + sizeof(struct pathComponent) + namelen >
989 eoffset)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700990 goto out_no_entry;
991 else
992 pc->lengthComponentIdent = namelen;
993
994 memcpy(pc->componentIdent, name, namelen);
995 }
996
997 elen += sizeof(struct pathComponent) + pc->lengthComponentIdent;
998
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700999 if (*symname) {
1000 do {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001001 symname++;
1002 } while (*symname == '/');
1003 }
1004 }
1005
Jan Kara3bf25cb2007-05-08 00:35:16 -07001006 brelse(epos.bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001007 inode->i_size = elen;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001008 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
1009 iinfo->i_lenAlloc = inode->i_size;
Jan Kara2c948b32009-12-03 13:39:28 +01001010 else
1011 udf_truncate_tail_extent(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001012 mark_inode_dirty(inode);
Jan Kara4ea77722013-12-23 22:02:16 +01001013 up_write(&iinfo->i_data_sem);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001014
Marcin Slusarz4b111112008-02-08 04:20:36 -08001015 fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
1016 if (!fi)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001017 goto out_no_entry;
Jan Karad664b6a2010-10-20 18:28:46 +02001018 cfi.icb.extLength = cpu_to_le32(sb->s_blocksize);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001019 cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location);
Jan Karad664b6a2010-10-20 18:28:46 +02001020 if (UDF_SB(inode->i_sb)->s_lvid_bh) {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001021 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
Jan Karad664b6a2010-10-20 18:28:46 +02001022 cpu_to_le32(lvid_get_unique_id(sb));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001023 }
1024 udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
Marcin Slusarzc0b34432008-02-08 04:20:42 -08001025 if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001026 mark_inode_dirty(dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001027 if (fibh.sbh != fibh.ebh)
Jan Kara3bf25cb2007-05-08 00:35:16 -07001028 brelse(fibh.ebh);
1029 brelse(fibh.sbh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001030 d_instantiate(dentry, inode);
1031 err = 0;
1032
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001033out:
Jan Karab80697c2008-03-04 14:14:05 +01001034 kfree(name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001035 return err;
1036
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001037out_no_entry:
Alessio Igor Bogani4d0fb622010-11-16 18:40:47 +01001038 up_write(&iinfo->i_data_sem);
Dave Hansen9a53c3a2006-09-30 23:29:03 -07001039 inode_dec_link_count(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001040 iput(inode);
1041 goto out;
1042}
1043
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001044static int udf_link(struct dentry *old_dentry, struct inode *dir,
1045 struct dentry *dentry)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001046{
1047 struct inode *inode = old_dentry->d_inode;
1048 struct udf_fileident_bh fibh;
1049 struct fileIdentDesc cfi, *fi;
1050 int err;
1051
Marcin Slusarz4b111112008-02-08 04:20:36 -08001052 fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
1053 if (!fi) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001054 return err;
1055 }
1056 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
Marcin Slusarzc0b34432008-02-08 04:20:42 -08001057 cfi.icb.extLocation = cpu_to_lelb(UDF_I(inode)->i_location);
Jan Karad664b6a2010-10-20 18:28:46 +02001058 if (UDF_SB(inode->i_sb)->s_lvid_bh) {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001059 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
Jan Karad664b6a2010-10-20 18:28:46 +02001060 cpu_to_le32(lvid_get_unique_id(inode->i_sb));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001061 }
1062 udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
Marcin Slusarzc0b34432008-02-08 04:20:42 -08001063 if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001064 mark_inode_dirty(dir);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001065
Linus Torvalds1da177e2005-04-16 15:20:36 -07001066 if (fibh.sbh != fibh.ebh)
Jan Kara3bf25cb2007-05-08 00:35:16 -07001067 brelse(fibh.ebh);
1068 brelse(fibh.sbh);
Dave Hansend8c76e62006-09-30 23:29:04 -07001069 inc_nlink(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001070 inode->i_ctime = current_fs_time(inode->i_sb);
1071 mark_inode_dirty(inode);
Al Viro7de9c6ee2010-10-23 11:11:40 -04001072 ihold(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001073 d_instantiate(dentry, inode);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001074
Linus Torvalds1da177e2005-04-16 15:20:36 -07001075 return 0;
1076}
1077
1078/* Anybody can rename anything with this: the permission checks are left to the
1079 * higher-level routines.
1080 */
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001081static int udf_rename(struct inode *old_dir, struct dentry *old_dentry,
1082 struct inode *new_dir, struct dentry *new_dentry)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001083{
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001084 struct inode *old_inode = old_dentry->d_inode;
1085 struct inode *new_inode = new_dentry->d_inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001086 struct udf_fileident_bh ofibh, nfibh;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001087 struct fileIdentDesc *ofi = NULL, *nfi = NULL, *dir_fi = NULL;
1088 struct fileIdentDesc ocfi, ncfi;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001089 struct buffer_head *dir_bh = NULL;
1090 int retval = -ENOENT;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001091 struct kernel_lb_addr tloc;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001092 struct udf_inode_info *old_iinfo = UDF_I(old_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001093
Al Viro9fbb76c2008-10-12 00:15:17 -04001094 ofi = udf_find_entry(old_dir, &old_dentry->d_name, &ofibh, &ocfi);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001095 if (ofi) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001096 if (ofibh.sbh != ofibh.ebh)
Jan Kara3bf25cb2007-05-08 00:35:16 -07001097 brelse(ofibh.ebh);
1098 brelse(ofibh.sbh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001099 }
1100 tloc = lelb_to_cpu(ocfi.icb.extLocation);
Pekka Enberg97e961f2008-10-15 12:29:03 +02001101 if (!ofi || udf_get_lb_pblock(old_dir->i_sb, &tloc, 0)
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001102 != old_inode->i_ino)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001103 goto end_rename;
1104
Al Viro9fbb76c2008-10-12 00:15:17 -04001105 nfi = udf_find_entry(new_dir, &new_dentry->d_name, &nfibh, &ncfi);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001106 if (nfi) {
1107 if (!new_inode) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001108 if (nfibh.sbh != nfibh.ebh)
Jan Kara3bf25cb2007-05-08 00:35:16 -07001109 brelse(nfibh.ebh);
1110 brelse(nfibh.sbh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001111 nfi = NULL;
1112 }
1113 }
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001114 if (S_ISDIR(old_inode->i_mode)) {
Marcin Slusarz7f3fbd02008-02-08 04:20:49 -08001115 int offset = udf_ext0_offset(old_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001116
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001117 if (new_inode) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001118 retval = -ENOTEMPTY;
1119 if (!empty_dir(new_inode))
1120 goto end_rename;
1121 }
1122 retval = -EIO;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001123 if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001124 dir_fi = udf_get_fileident(
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001125 old_iinfo->i_ext.i_data -
1126 (old_iinfo->i_efe ?
Marcin Slusarz4b111112008-02-08 04:20:36 -08001127 sizeof(struct extendedFileEntry) :
1128 sizeof(struct fileEntry)),
1129 old_inode->i_sb->s_blocksize, &offset);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001130 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001131 dir_bh = udf_bread(old_inode, 0, 0, &retval);
1132 if (!dir_bh)
1133 goto end_rename;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001134 dir_fi = udf_get_fileident(dir_bh->b_data,
1135 old_inode->i_sb->s_blocksize, &offset);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001136 }
1137 if (!dir_fi)
1138 goto end_rename;
1139 tloc = lelb_to_cpu(dir_fi->icb.extLocation);
Pekka Enberg97e961f2008-10-15 12:29:03 +02001140 if (udf_get_lb_pblock(old_inode->i_sb, &tloc, 0) !=
Marcin Slusarz4b111112008-02-08 04:20:36 -08001141 old_dir->i_ino)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001142 goto end_rename;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001143 }
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001144 if (!nfi) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001145 nfi = udf_add_entry(new_dir, new_dentry, &nfibh, &ncfi,
1146 &retval);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001147 if (!nfi)
1148 goto end_rename;
1149 }
1150
1151 /*
1152 * Like most other Unix systems, set the ctime for inodes on a
1153 * rename.
1154 */
1155 old_inode->i_ctime = current_fs_time(old_inode->i_sb);
1156 mark_inode_dirty(old_inode);
1157
1158 /*
1159 * ok, that's it
1160 */
1161 ncfi.fileVersionNum = ocfi.fileVersionNum;
1162 ncfi.fileCharacteristics = ocfi.fileCharacteristics;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001163 memcpy(&(ncfi.icb), &(ocfi.icb), sizeof(struct long_ad));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001164 udf_write_fi(new_dir, &ncfi, nfi, &nfibh, NULL, NULL);
1165
1166 /* The old fid may have moved - find it again */
Al Viro9fbb76c2008-10-12 00:15:17 -04001167 ofi = udf_find_entry(old_dir, &old_dentry->d_name, &ofibh, &ocfi);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001168 udf_delete_entry(old_dir, ofi, &ofibh, &ocfi);
1169
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001170 if (new_inode) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001171 new_inode->i_ctime = current_fs_time(new_inode->i_sb);
Dave Hansen9a53c3a2006-09-30 23:29:03 -07001172 inode_dec_link_count(new_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001173 }
1174 old_dir->i_ctime = old_dir->i_mtime = current_fs_time(old_dir->i_sb);
1175 mark_inode_dirty(old_dir);
1176
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001177 if (dir_fi) {
Marcin Slusarzc0b34432008-02-08 04:20:42 -08001178 dir_fi->icb.extLocation = cpu_to_lelb(UDF_I(new_dir)->i_location);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001179 udf_update_tag((char *)dir_fi,
1180 (sizeof(struct fileIdentDesc) +
1181 le16_to_cpu(dir_fi->lengthOfImpUse) + 3) & ~3);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001182 if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001183 mark_inode_dirty(old_inode);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001184 else
Linus Torvalds1da177e2005-04-16 15:20:36 -07001185 mark_buffer_dirty_inode(dir_bh, old_inode);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001186
Dave Hansen9a53c3a2006-09-30 23:29:03 -07001187 inode_dec_link_count(old_dir);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001188 if (new_inode)
Dave Hansen9a53c3a2006-09-30 23:29:03 -07001189 inode_dec_link_count(new_inode);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001190 else {
Dave Hansend8c76e62006-09-30 23:29:04 -07001191 inc_nlink(new_dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001192 mark_inode_dirty(new_dir);
1193 }
1194 }
1195
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001196 if (ofi) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001197 if (ofibh.sbh != ofibh.ebh)
Jan Kara3bf25cb2007-05-08 00:35:16 -07001198 brelse(ofibh.ebh);
1199 brelse(ofibh.sbh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001200 }
1201
1202 retval = 0;
1203
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001204end_rename:
Jan Kara3bf25cb2007-05-08 00:35:16 -07001205 brelse(dir_bh);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001206 if (nfi) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001207 if (nfibh.sbh != nfibh.ebh)
Jan Kara3bf25cb2007-05-08 00:35:16 -07001208 brelse(nfibh.ebh);
1209 brelse(nfibh.sbh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001210 }
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001211
Linus Torvalds1da177e2005-04-16 15:20:36 -07001212 return retval;
1213}
1214
Rasmus Rohde221e5832008-04-30 17:22:06 +02001215static struct dentry *udf_get_parent(struct dentry *child)
1216{
Pekka Enberg97e961f2008-10-15 12:29:03 +02001217 struct kernel_lb_addr tloc;
Rasmus Rohde221e5832008-04-30 17:22:06 +02001218 struct inode *inode = NULL;
Linus Torvalds26fe5752012-05-10 13:14:12 -07001219 struct qstr dotdot = QSTR_INIT("..", 2);
Rasmus Rohde221e5832008-04-30 17:22:06 +02001220 struct fileIdentDesc cfi;
1221 struct udf_fileident_bh fibh;
1222
Rasmus Rohde221e5832008-04-30 17:22:06 +02001223 if (!udf_find_entry(child->d_inode, &dotdot, &fibh, &cfi))
1224 goto out_unlock;
1225
1226 if (fibh.sbh != fibh.ebh)
1227 brelse(fibh.ebh);
1228 brelse(fibh.sbh);
1229
Pekka Enberg97e961f2008-10-15 12:29:03 +02001230 tloc = lelb_to_cpu(cfi.icb.extLocation);
1231 inode = udf_iget(child->d_inode->i_sb, &tloc);
Rasmus Rohde221e5832008-04-30 17:22:06 +02001232 if (!inode)
1233 goto out_unlock;
Rasmus Rohde221e5832008-04-30 17:22:06 +02001234
Christoph Hellwig44003722008-08-11 15:49:04 +02001235 return d_obtain_alias(inode);
Rasmus Rohde221e5832008-04-30 17:22:06 +02001236out_unlock:
Rasmus Rohde221e5832008-04-30 17:22:06 +02001237 return ERR_PTR(-EACCES);
1238}
1239
1240
1241static struct dentry *udf_nfs_get_inode(struct super_block *sb, u32 block,
1242 u16 partref, __u32 generation)
1243{
1244 struct inode *inode;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001245 struct kernel_lb_addr loc;
Rasmus Rohde221e5832008-04-30 17:22:06 +02001246
1247 if (block == 0)
1248 return ERR_PTR(-ESTALE);
1249
1250 loc.logicalBlockNum = block;
1251 loc.partitionReferenceNum = partref;
Pekka Enberg97e961f2008-10-15 12:29:03 +02001252 inode = udf_iget(sb, &loc);
Rasmus Rohde221e5832008-04-30 17:22:06 +02001253
1254 if (inode == NULL)
1255 return ERR_PTR(-ENOMEM);
1256
1257 if (generation && inode->i_generation != generation) {
1258 iput(inode);
1259 return ERR_PTR(-ESTALE);
1260 }
Christoph Hellwig44003722008-08-11 15:49:04 +02001261 return d_obtain_alias(inode);
Rasmus Rohde221e5832008-04-30 17:22:06 +02001262}
1263
1264static struct dentry *udf_fh_to_dentry(struct super_block *sb,
1265 struct fid *fid, int fh_len, int fh_type)
1266{
1267 if ((fh_len != 3 && fh_len != 5) ||
1268 (fh_type != FILEID_UDF_WITH_PARENT &&
1269 fh_type != FILEID_UDF_WITHOUT_PARENT))
1270 return NULL;
1271
1272 return udf_nfs_get_inode(sb, fid->udf.block, fid->udf.partref,
1273 fid->udf.generation);
1274}
1275
1276static struct dentry *udf_fh_to_parent(struct super_block *sb,
1277 struct fid *fid, int fh_len, int fh_type)
1278{
1279 if (fh_len != 5 || fh_type != FILEID_UDF_WITH_PARENT)
1280 return NULL;
1281
1282 return udf_nfs_get_inode(sb, fid->udf.parent_block,
1283 fid->udf.parent_partref,
1284 fid->udf.parent_generation);
1285}
Al Virob0b03822012-04-02 14:34:06 -04001286static int udf_encode_fh(struct inode *inode, __u32 *fh, int *lenp,
1287 struct inode *parent)
Rasmus Rohde221e5832008-04-30 17:22:06 +02001288{
1289 int len = *lenp;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001290 struct kernel_lb_addr location = UDF_I(inode)->i_location;
Rasmus Rohde221e5832008-04-30 17:22:06 +02001291 struct fid *fid = (struct fid *)fh;
1292 int type = FILEID_UDF_WITHOUT_PARENT;
1293
Al Virob0b03822012-04-02 14:34:06 -04001294 if (parent && (len < 5)) {
Aneesh Kumar K.V5fe0c232011-01-29 18:43:25 +05301295 *lenp = 5;
Namjae Jeon94e07a752013-02-17 15:48:11 +09001296 return FILEID_INVALID;
Aneesh Kumar K.V5fe0c232011-01-29 18:43:25 +05301297 } else if (len < 3) {
1298 *lenp = 3;
Namjae Jeon94e07a752013-02-17 15:48:11 +09001299 return FILEID_INVALID;
Aneesh Kumar K.V5fe0c232011-01-29 18:43:25 +05301300 }
Rasmus Rohde221e5832008-04-30 17:22:06 +02001301
1302 *lenp = 3;
1303 fid->udf.block = location.logicalBlockNum;
1304 fid->udf.partref = location.partitionReferenceNum;
Mathias Krause0143fc52012-07-12 08:46:55 +02001305 fid->udf.parent_partref = 0;
Rasmus Rohde221e5832008-04-30 17:22:06 +02001306 fid->udf.generation = inode->i_generation;
1307
Al Virob0b03822012-04-02 14:34:06 -04001308 if (parent) {
1309 location = UDF_I(parent)->i_location;
Rasmus Rohde221e5832008-04-30 17:22:06 +02001310 fid->udf.parent_block = location.logicalBlockNum;
1311 fid->udf.parent_partref = location.partitionReferenceNum;
1312 fid->udf.parent_generation = inode->i_generation;
Rasmus Rohde221e5832008-04-30 17:22:06 +02001313 *lenp = 5;
1314 type = FILEID_UDF_WITH_PARENT;
1315 }
1316
1317 return type;
1318}
1319
1320const struct export_operations udf_export_ops = {
1321 .encode_fh = udf_encode_fh,
1322 .fh_to_dentry = udf_fh_to_dentry,
1323 .fh_to_parent = udf_fh_to_parent,
1324 .get_parent = udf_get_parent,
1325};
1326
Arjan van de Venc5ef1c42007-02-12 00:55:40 -08001327const struct inode_operations udf_dir_inode_operations = {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001328 .lookup = udf_lookup,
1329 .create = udf_create,
1330 .link = udf_link,
1331 .unlink = udf_unlink,
1332 .symlink = udf_symlink,
1333 .mkdir = udf_mkdir,
1334 .rmdir = udf_rmdir,
1335 .mknod = udf_mknod,
1336 .rename = udf_rename,
Al Viro656d09d2013-06-12 09:35:33 +04001337 .tmpfile = udf_tmpfile,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001338};
Dmitry Monakhovc15d0fc2010-03-29 11:05:21 +04001339const struct inode_operations udf_symlink_inode_operations = {
1340 .readlink = generic_readlink,
1341 .follow_link = page_follow_link_light,
1342 .put_link = page_put_link,
Dmitry Monakhovc15d0fc2010-03-29 11:05:21 +04001343};