blob: c97b5a8d1e24cfe831824e7beff18efc84340916 [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>
Alexey Dobriyane8edc6e2007-05-21 01:22:52 +040030#include <linux/sched.h>
Bob Copelandf845fce2008-04-17 09:47:48 +020031#include <linux/crc-itu-t.h>
Rasmus Rohde221e5832008-04-30 17:22:06 +020032#include <linux/exportfs.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070033
Al Viro391e8bb2010-01-31 21:28:48 -050034static inline int udf_match(int len1, const unsigned char *name1, int len2,
35 const unsigned char *name2)
Linus Torvalds1da177e2005-04-16 15:20:36 -070036{
37 if (len1 != len2)
38 return 0;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -070039
Linus Torvalds1da177e2005-04-16 15:20:36 -070040 return !memcmp(name1, name2, len1);
41}
42
43int udf_write_fi(struct inode *inode, struct fileIdentDesc *cfi,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -070044 struct fileIdentDesc *sfi, struct udf_fileident_bh *fibh,
Marcin Slusarz4b111112008-02-08 04:20:36 -080045 uint8_t *impuse, uint8_t *fileident)
Linus Torvalds1da177e2005-04-16 15:20:36 -070046{
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +020047 uint16_t crclen = fibh->eoffset - fibh->soffset - sizeof(struct tag);
Linus Torvalds1da177e2005-04-16 15:20:36 -070048 uint16_t crc;
Linus Torvalds1da177e2005-04-16 15:20:36 -070049 int offset;
50 uint16_t liu = le16_to_cpu(cfi->lengthOfImpUse);
51 uint8_t lfi = cfi->lengthFileIdent;
52 int padlen = fibh->eoffset - fibh->soffset - liu - lfi -
Cyrill Gorcunov28de7942007-07-21 04:37:18 -070053 sizeof(struct fileIdentDesc);
Linus Torvalds1da177e2005-04-16 15:20:36 -070054 int adinicb = 0;
55
Marcin Slusarzc0b34432008-02-08 04:20:42 -080056 if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
Linus Torvalds1da177e2005-04-16 15:20:36 -070057 adinicb = 1;
58
59 offset = fibh->soffset + sizeof(struct fileIdentDesc);
60
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -070061 if (impuse) {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -070062 if (adinicb || (offset + liu < 0)) {
63 memcpy((uint8_t *)sfi->impUse, impuse, liu);
64 } else if (offset >= 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -070065 memcpy(fibh->ebh->b_data + offset, impuse, liu);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -070066 } else {
67 memcpy((uint8_t *)sfi->impUse, impuse, -offset);
Marcin Slusarz4b111112008-02-08 04:20:36 -080068 memcpy(fibh->ebh->b_data, impuse - offset,
69 liu + offset);
Linus Torvalds1da177e2005-04-16 15:20:36 -070070 }
71 }
72
73 offset += liu;
74
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -070075 if (fileident) {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -070076 if (adinicb || (offset + lfi < 0)) {
77 memcpy((uint8_t *)sfi->fileIdent + liu, fileident, lfi);
78 } else if (offset >= 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -070079 memcpy(fibh->ebh->b_data + offset, fileident, lfi);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -070080 } else {
Marcin Slusarz4b111112008-02-08 04:20:36 -080081 memcpy((uint8_t *)sfi->fileIdent + liu, fileident,
82 -offset);
83 memcpy(fibh->ebh->b_data, fileident - offset,
84 lfi + offset);
Linus Torvalds1da177e2005-04-16 15:20:36 -070085 }
86 }
87
88 offset += lfi;
89
Cyrill Gorcunov28de7942007-07-21 04:37:18 -070090 if (adinicb || (offset + padlen < 0)) {
91 memset((uint8_t *)sfi->padding + liu + lfi, 0x00, padlen);
92 } else if (offset >= 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -070093 memset(fibh->ebh->b_data + offset, 0x00, padlen);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -070094 } else {
95 memset((uint8_t *)sfi->padding + liu + lfi, 0x00, -offset);
Linus Torvalds1da177e2005-04-16 15:20:36 -070096 memset(fibh->ebh->b_data, 0x00, padlen + offset);
97 }
98
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +020099 crc = crc_itu_t(0, (uint8_t *)cfi + sizeof(struct tag),
100 sizeof(struct fileIdentDesc) - sizeof(struct tag));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700102 if (fibh->sbh == fibh->ebh) {
Bob Copelandf845fce2008-04-17 09:47:48 +0200103 crc = crc_itu_t(crc, (uint8_t *)sfi->impUse,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200104 crclen + sizeof(struct tag) -
Bob Copelandf845fce2008-04-17 09:47:48 +0200105 sizeof(struct fileIdentDesc));
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700106 } else if (sizeof(struct fileIdentDesc) >= -fibh->soffset) {
Bob Copelandf845fce2008-04-17 09:47:48 +0200107 crc = crc_itu_t(crc, fibh->ebh->b_data +
Marcin Slusarz4b111112008-02-08 04:20:36 -0800108 sizeof(struct fileIdentDesc) +
109 fibh->soffset,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200110 crclen + sizeof(struct tag) -
Bob Copelandf845fce2008-04-17 09:47:48 +0200111 sizeof(struct fileIdentDesc));
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700112 } else {
Bob Copelandf845fce2008-04-17 09:47:48 +0200113 crc = crc_itu_t(crc, (uint8_t *)sfi->impUse,
114 -fibh->soffset - sizeof(struct fileIdentDesc));
115 crc = crc_itu_t(crc, fibh->ebh->b_data, fibh->eoffset);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116 }
117
118 cfi->descTag.descCRC = cpu_to_le16(crc);
119 cfi->descTag.descCRCLength = cpu_to_le16(crclen);
Marcin Slusarz3f2587b2008-02-08 04:20:39 -0800120 cfi->descTag.tagChecksum = udf_tag_checksum(&cfi->descTag);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700122 if (adinicb || (sizeof(struct fileIdentDesc) <= -fibh->soffset)) {
Marcin Slusarz4b111112008-02-08 04:20:36 -0800123 memcpy((uint8_t *)sfi, (uint8_t *)cfi,
124 sizeof(struct fileIdentDesc));
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700125 } else {
126 memcpy((uint8_t *)sfi, (uint8_t *)cfi, -fibh->soffset);
127 memcpy(fibh->ebh->b_data, (uint8_t *)cfi - fibh->soffset,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700128 sizeof(struct fileIdentDesc) + fibh->soffset);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129 }
130
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700131 if (adinicb) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132 mark_inode_dirty(inode);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700133 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134 if (fibh->sbh != fibh->ebh)
135 mark_buffer_dirty_inode(fibh->ebh, inode);
136 mark_buffer_dirty_inode(fibh->sbh, inode);
137 }
138 return 0;
139}
140
Fabian Frederick231473f2015-04-08 21:23:58 +0200141/**
142 * udf_find_entry - find entry in given directory.
143 *
144 * @dir: directory inode to search in
145 * @child: qstr of the name
146 * @fibh: buffer head / inode with file identifier descriptor we found
147 * @cfi: found file identifier descriptor with given name
148 *
149 * This function searches in the directory @dir for a file name @child. When
150 * found, @fibh points to the buffer head(s) (bh is NULL for in ICB
151 * directories) containing the file identifier descriptor (FID). In that case
152 * the function returns pointer to the FID in the buffer or inode - but note
153 * that FID may be split among two buffers (blocks) so accessing it via that
154 * pointer isn't easily possible. This pointer can be used only as an iterator
155 * for other directory manipulation functions. For inspection of the FID @cfi
156 * can be used - the found FID is copied there.
157 *
158 * Returns pointer to FID, NULL when nothing found, or error code.
159 */
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700160static struct fileIdentDesc *udf_find_entry(struct inode *dir,
Al Viro391e8bb2010-01-31 21:28:48 -0500161 const struct qstr *child,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700162 struct udf_fileident_bh *fibh,
163 struct fileIdentDesc *cfi)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164{
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700165 struct fileIdentDesc *fi = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166 loff_t f_pos;
167 int block, flen;
Al Viro391e8bb2010-01-31 21:28:48 -0500168 unsigned char *fname = NULL;
169 unsigned char *nameptr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170 uint8_t lfi;
171 uint16_t liu;
KAMBAROV, ZAURec471dc2005-06-28 20:45:10 -0700172 loff_t size;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200173 struct kernel_lb_addr eloc;
Jan Karaff116fc2007-05-08 00:35:14 -0700174 uint32_t elen;
Jan Kara60448b12007-05-08 00:35:13 -0700175 sector_t offset;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700176 struct extent_position epos = {};
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800177 struct udf_inode_info *dinfo = UDF_I(dir);
Al Viro9fbb76c2008-10-12 00:15:17 -0400178 int isdotdot = child->len == 2 &&
179 child->name[0] == '.' && child->name[1] == '.';
Jan Kara3ee30392014-12-18 22:49:12 +0100180 struct super_block *sb = dir->i_sb;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181
Jan Karaaf793292008-02-08 04:20:50 -0800182 size = udf_ext0_offset(dir) + dir->i_size;
183 f_pos = udf_ext0_offset(dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184
Jan Karab80697c2008-03-04 14:14:05 +0100185 fibh->sbh = fibh->ebh = NULL;
Jan Kara3ee30392014-12-18 22:49:12 +0100186 fibh->soffset = fibh->eoffset = f_pos & (sb->s_blocksize - 1);
Jan Karab80697c2008-03-04 14:14:05 +0100187 if (dinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
Jan Kara3ee30392014-12-18 22:49:12 +0100188 if (inode_bmap(dir, f_pos >> sb->s_blocksize_bits, &epos,
Fabian Frederick231473f2015-04-08 21:23:58 +0200189 &eloc, &elen, &offset) != (EXT_RECORDED_ALLOCATED >> 30)) {
190 fi = ERR_PTR(-EIO);
Jan Karab80697c2008-03-04 14:14:05 +0100191 goto out_err;
Fabian Frederick231473f2015-04-08 21:23:58 +0200192 }
193
Jan Kara3ee30392014-12-18 22:49:12 +0100194 block = udf_get_lb_pblock(sb, &eloc, offset);
195 if ((++offset << sb->s_blocksize_bits) < elen) {
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800196 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200197 epos.offset -= sizeof(struct short_ad);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800198 else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200199 epos.offset -= sizeof(struct long_ad);
Marcin Slusarz4b111112008-02-08 04:20:36 -0800200 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201 offset = 0;
202
Jan Kara3ee30392014-12-18 22:49:12 +0100203 fibh->sbh = fibh->ebh = udf_tread(sb, block);
Fabian Frederick231473f2015-04-08 21:23:58 +0200204 if (!fibh->sbh) {
205 fi = ERR_PTR(-EIO);
Jan Karab80697c2008-03-04 14:14:05 +0100206 goto out_err;
Fabian Frederick231473f2015-04-08 21:23:58 +0200207 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208 }
209
Jan Karab80697c2008-03-04 14:14:05 +0100210 fname = kmalloc(UDF_NAME_LEN, GFP_NOFS);
Fabian Frederick231473f2015-04-08 21:23:58 +0200211 if (!fname) {
212 fi = ERR_PTR(-ENOMEM);
Jan Karab80697c2008-03-04 14:14:05 +0100213 goto out_err;
Fabian Frederick231473f2015-04-08 21:23:58 +0200214 }
Jan Karab80697c2008-03-04 14:14:05 +0100215
Jan Karaaf793292008-02-08 04:20:50 -0800216 while (f_pos < size) {
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700217 fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc,
218 &elen, &offset);
Fabian Frederick231473f2015-04-08 21:23:58 +0200219 if (!fi) {
220 fi = ERR_PTR(-EIO);
Jan Karab80697c2008-03-04 14:14:05 +0100221 goto out_err;
Fabian Frederick231473f2015-04-08 21:23:58 +0200222 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223
224 liu = le16_to_cpu(cfi->lengthOfImpUse);
225 lfi = cfi->lengthFileIdent;
226
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700227 if (fibh->sbh == fibh->ebh) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228 nameptr = fi->fileIdent + liu;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700229 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230 int poffset; /* Unpaded ending offset */
231
Marcin Slusarz4b111112008-02-08 04:20:36 -0800232 poffset = fibh->soffset + sizeof(struct fileIdentDesc) +
233 liu + lfi;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234
Marcin Slusarz4b111112008-02-08 04:20:36 -0800235 if (poffset >= lfi)
236 nameptr = (uint8_t *)(fibh->ebh->b_data +
237 poffset - lfi);
238 else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239 nameptr = fname;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800240 memcpy(nameptr, fi->fileIdent + liu,
241 lfi - poffset);
242 memcpy(nameptr + lfi - poffset,
243 fibh->ebh->b_data, poffset);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700244 }
245 }
246
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700247 if ((cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) {
Jan Kara3ee30392014-12-18 22:49:12 +0100248 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_UNDELETE))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700249 continue;
250 }
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700251
252 if ((cfi->fileCharacteristics & FID_FILE_CHAR_HIDDEN) != 0) {
Jan Kara3ee30392014-12-18 22:49:12 +0100253 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_UNHIDE))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700254 continue;
255 }
256
Rasmus Rohde221e5832008-04-30 17:22:06 +0200257 if ((cfi->fileCharacteristics & FID_FILE_CHAR_PARENT) &&
Jesper Juhla4264b32010-12-12 23:18:15 +0100258 isdotdot)
259 goto out_ok;
Rasmus Rohde221e5832008-04-30 17:22:06 +0200260
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261 if (!lfi)
262 continue;
263
Jan Kara3ee30392014-12-18 22:49:12 +0100264 flen = udf_get_filename(sb, nameptr, lfi, fname, UDF_NAME_LEN);
Fabian Frederick231473f2015-04-08 21:23:58 +0200265 if (flen < 0) {
266 fi = ERR_PTR(flen);
267 goto out_err;
268 }
269
270 if (udf_match(flen, fname, child->len, child->name))
Jan Karab80697c2008-03-04 14:14:05 +0100271 goto out_ok;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272 }
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700273
Jan Karab80697c2008-03-04 14:14:05 +0100274 fi = NULL;
Fabian Frederick231473f2015-04-08 21:23:58 +0200275out_err:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700276 if (fibh->sbh != fibh->ebh)
Jan Kara3bf25cb2007-05-08 00:35:16 -0700277 brelse(fibh->ebh);
278 brelse(fibh->sbh);
Jan Karab80697c2008-03-04 14:14:05 +0100279out_ok:
Jan Kara3bf25cb2007-05-08 00:35:16 -0700280 brelse(epos.bh);
Jan Karab80697c2008-03-04 14:14:05 +0100281 kfree(fname);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700282
Jan Karab80697c2008-03-04 14:14:05 +0100283 return fi;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700284}
285
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700286static struct dentry *udf_lookup(struct inode *dir, struct dentry *dentry,
Al Viro00cd8dd2012-06-10 17:13:09 -0400287 unsigned int flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700288{
289 struct inode *inode = NULL;
Jayachandran Cdb9a3692006-02-03 03:04:50 -0800290 struct fileIdentDesc cfi;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700291 struct udf_fileident_bh fibh;
Fabian Frederick231473f2015-04-08 21:23:58 +0200292 struct fileIdentDesc *fi;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700294 if (dentry->d_name.len > UDF_NAME_LEN - 2)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295 return ERR_PTR(-ENAMETOOLONG);
296
Linus Torvalds1da177e2005-04-16 15:20:36 -0700297#ifdef UDF_RECOVERY
298 /* temporary shorthand for specifying files by inode number */
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700299 if (!strncmp(dentry->d_name.name, ".B=", 3)) {
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200300 struct kernel_lb_addr lb = {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700301 .logicalBlockNum = 0,
Marcin Slusarz4b111112008-02-08 04:20:36 -0800302 .partitionReferenceNum =
303 simple_strtoul(dentry->d_name.name + 3,
304 NULL, 0),
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700305 };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306 inode = udf_iget(dir->i_sb, lb);
Jan Kara6d3d5e82014-09-04 16:15:51 +0200307 if (IS_ERR(inode))
308 return inode;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800309 } else
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700310#endif /* UDF_RECOVERY */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311
Fabian Frederick231473f2015-04-08 21:23:58 +0200312 fi = udf_find_entry(dir, &dentry->d_name, &fibh, &cfi);
313 if (IS_ERR(fi))
314 return ERR_CAST(fi);
315
316 if (fi) {
Pekka Enberg97e961f2008-10-15 12:29:03 +0200317 struct kernel_lb_addr loc;
318
Linus Torvalds1da177e2005-04-16 15:20:36 -0700319 if (fibh.sbh != fibh.ebh)
Jan Kara3bf25cb2007-05-08 00:35:16 -0700320 brelse(fibh.ebh);
321 brelse(fibh.sbh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700322
Pekka Enberg97e961f2008-10-15 12:29:03 +0200323 loc = lelb_to_cpu(cfi.icb.extLocation);
324 inode = udf_iget(dir->i_sb, &loc);
Jan Kara6d3d5e82014-09-04 16:15:51 +0200325 if (IS_ERR(inode))
326 return ERR_CAST(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700327 }
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700328
Rasmus Rohde221e5832008-04-30 17:22:06 +0200329 return d_splice_alias(inode, dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330}
331
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700332static struct fileIdentDesc *udf_add_entry(struct inode *dir,
333 struct dentry *dentry,
334 struct udf_fileident_bh *fibh,
335 struct fileIdentDesc *cfi, int *err)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336{
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800337 struct super_block *sb = dir->i_sb;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700338 struct fileIdentDesc *fi = NULL;
Al Viro391e8bb2010-01-31 21:28:48 -0500339 unsigned char *name = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700340 int namelen;
341 loff_t f_pos;
Jan Karaaf793292008-02-08 04:20:50 -0800342 loff_t size = udf_ext0_offset(dir) + dir->i_size;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700343 int nfidlen;
344 uint8_t lfi;
345 uint16_t liu;
346 int block;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200347 struct kernel_lb_addr eloc;
Jan Kara9afadc42008-05-06 18:26:17 +0200348 uint32_t elen = 0;
Jan Kara60448b12007-05-08 00:35:13 -0700349 sector_t offset;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700350 struct extent_position epos = {};
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800351 struct udf_inode_info *dinfo;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700352
Jan Karab80697c2008-03-04 14:14:05 +0100353 fibh->sbh = fibh->ebh = NULL;
354 name = kmalloc(UDF_NAME_LEN, GFP_NOFS);
355 if (!name) {
356 *err = -ENOMEM;
357 goto out_err;
358 }
359
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700360 if (dentry) {
361 if (!dentry->d_name.len) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362 *err = -EINVAL;
Jan Karab80697c2008-03-04 14:14:05 +0100363 goto out_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700364 }
Marcin Slusarz4b111112008-02-08 04:20:36 -0800365 namelen = udf_put_filename(sb, dentry->d_name.name, name,
366 dentry->d_name.len);
367 if (!namelen) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700368 *err = -ENAMETOOLONG;
Jan Karab80697c2008-03-04 14:14:05 +0100369 goto out_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370 }
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700371 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700372 namelen = 0;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700373 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374
375 nfidlen = (sizeof(struct fileIdentDesc) + namelen + 3) & ~3;
376
Jan Karaaf793292008-02-08 04:20:50 -0800377 f_pos = udf_ext0_offset(dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378
Jan Karaaf793292008-02-08 04:20:50 -0800379 fibh->soffset = fibh->eoffset = f_pos & (dir->i_sb->s_blocksize - 1);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800380 dinfo = UDF_I(dir);
Jan Karab80697c2008-03-04 14:14:05 +0100381 if (dinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
382 if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits, &epos,
383 &eloc, &elen, &offset) != (EXT_RECORDED_ALLOCATED >> 30)) {
384 block = udf_get_lb_pblock(dir->i_sb,
Pekka Enberg97e961f2008-10-15 12:29:03 +0200385 &dinfo->i_location, 0);
Jan Karab80697c2008-03-04 14:14:05 +0100386 fibh->soffset = fibh->eoffset = sb->s_blocksize;
387 goto add;
388 }
Pekka Enberg97e961f2008-10-15 12:29:03 +0200389 block = udf_get_lb_pblock(dir->i_sb, &eloc, offset);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700390 if ((++offset << dir->i_sb->s_blocksize_bits) < elen) {
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800391 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200392 epos.offset -= sizeof(struct short_ad);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800393 else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200394 epos.offset -= sizeof(struct long_ad);
Marcin Slusarz4b111112008-02-08 04:20:36 -0800395 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700396 offset = 0;
397
Marcin Slusarz4b111112008-02-08 04:20:36 -0800398 fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block);
399 if (!fibh->sbh) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700400 *err = -EIO;
Jan Karab80697c2008-03-04 14:14:05 +0100401 goto out_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700402 }
403
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800404 block = dinfo->i_location.logicalBlockNum;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700405 }
406
Jan Karaaf793292008-02-08 04:20:50 -0800407 while (f_pos < size) {
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700408 fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc,
409 &elen, &offset);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700411 if (!fi) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700412 *err = -EIO;
Jan Karab80697c2008-03-04 14:14:05 +0100413 goto out_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700414 }
415
416 liu = le16_to_cpu(cfi->lengthOfImpUse);
417 lfi = cfi->lengthFileIdent;
418
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700419 if ((cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) {
Marcin Slusarz4b111112008-02-08 04:20:36 -0800420 if (((sizeof(struct fileIdentDesc) +
421 liu + lfi + 3) & ~3) == nfidlen) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700422 cfi->descTag.tagSerialNum = cpu_to_le16(1);
423 cfi->fileVersionNum = cpu_to_le16(1);
424 cfi->fileCharacteristics = 0;
425 cfi->lengthFileIdent = namelen;
426 cfi->lengthOfImpUse = cpu_to_le16(0);
Marcin Slusarz4b111112008-02-08 04:20:36 -0800427 if (!udf_write_fi(dir, cfi, fi, fibh, NULL,
428 name))
Jan Karab80697c2008-03-04 14:14:05 +0100429 goto out_ok;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800430 else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700431 *err = -EIO;
Jan Karab80697c2008-03-04 14:14:05 +0100432 goto out_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700433 }
434 }
435 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700436 }
437
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700438add:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700439 f_pos += nfidlen;
440
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800441 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB &&
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700442 sb->s_blocksize - fibh->eoffset < nfidlen) {
Jan Kara3bf25cb2007-05-08 00:35:16 -0700443 brelse(epos.bh);
Jan Karaff116fc2007-05-08 00:35:14 -0700444 epos.bh = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700445 fibh->soffset -= udf_ext0_offset(dir);
446 fibh->eoffset -= udf_ext0_offset(dir);
Jan Karaaf793292008-02-08 04:20:50 -0800447 f_pos -= udf_ext0_offset(dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700448 if (fibh->sbh != fibh->ebh)
Jan Kara3bf25cb2007-05-08 00:35:16 -0700449 brelse(fibh->ebh);
450 brelse(fibh->sbh);
Marcin Slusarz4b111112008-02-08 04:20:36 -0800451 fibh->sbh = fibh->ebh =
452 udf_expand_dir_adinicb(dir, &block, err);
453 if (!fibh->sbh)
Jan Karab80697c2008-03-04 14:14:05 +0100454 goto out_err;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800455 epos.block = dinfo->i_location;
Jan Karaff116fc2007-05-08 00:35:14 -0700456 epos.offset = udf_file_entry_alloc_offset(dir);
Jan Kara05343c42008-02-08 04:20:51 -0800457 /* Load extent udf_expand_dir_adinicb() has created */
458 udf_current_aext(dir, &epos, &eloc, &elen, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700459 }
460
Jan Kara2c948b32009-12-03 13:39:28 +0100461 /* Entry fits into current block? */
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700462 if (sb->s_blocksize - fibh->eoffset >= nfidlen) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700463 fibh->soffset = fibh->eoffset;
464 fibh->eoffset += nfidlen;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700465 if (fibh->sbh != fibh->ebh) {
Jan Kara3bf25cb2007-05-08 00:35:16 -0700466 brelse(fibh->sbh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700467 fibh->sbh = fibh->ebh;
468 }
469
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800470 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
471 block = dinfo->i_location.logicalBlockNum;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800472 fi = (struct fileIdentDesc *)
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800473 (dinfo->i_ext.i_data +
Marcin Slusarzc0b34432008-02-08 04:20:42 -0800474 fibh->soffset -
Marcin Slusarz4b111112008-02-08 04:20:36 -0800475 udf_ext0_offset(dir) +
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800476 dinfo->i_lenEAttr);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700477 } else {
Marcin Slusarz4b111112008-02-08 04:20:36 -0800478 block = eloc.logicalBlockNum +
479 ((elen - 1) >>
480 dir->i_sb->s_blocksize_bits);
481 fi = (struct fileIdentDesc *)
482 (fibh->sbh->b_data + fibh->soffset);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700483 }
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700484 } else {
Jan Kara2c948b32009-12-03 13:39:28 +0100485 /* Round up last extent in the file */
486 elen = (elen + sb->s_blocksize - 1) & ~(sb->s_blocksize - 1);
487 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
488 epos.offset -= sizeof(struct short_ad);
489 else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
490 epos.offset -= sizeof(struct long_ad);
491 udf_write_aext(dir, &epos, &eloc, elen, 1);
492 dinfo->i_lenExtents = (dinfo->i_lenExtents + sb->s_blocksize
493 - 1) & ~(sb->s_blocksize - 1);
494
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495 fibh->soffset = fibh->eoffset - sb->s_blocksize;
496 fibh->eoffset += nfidlen - sb->s_blocksize;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700497 if (fibh->sbh != fibh->ebh) {
Jan Kara3bf25cb2007-05-08 00:35:16 -0700498 brelse(fibh->sbh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700499 fibh->sbh = fibh->ebh;
500 }
501
502 block = eloc.logicalBlockNum + ((elen - 1) >>
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700503 dir->i_sb->s_blocksize_bits);
Marcin Slusarz4b111112008-02-08 04:20:36 -0800504 fibh->ebh = udf_bread(dir,
Jan Karaaf793292008-02-08 04:20:50 -0800505 f_pos >> dir->i_sb->s_blocksize_bits, 1, err);
Jan Karab80697c2008-03-04 14:14:05 +0100506 if (!fibh->ebh)
507 goto out_err;
Jan Kara4651c592010-11-25 03:56:24 +0100508 /* Extents could have been merged, invalidate our position */
509 brelse(epos.bh);
510 epos.bh = NULL;
511 epos.block = dinfo->i_location;
512 epos.offset = udf_file_entry_alloc_offset(dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700513
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700514 if (!fibh->soffset) {
Jan Kara4651c592010-11-25 03:56:24 +0100515 /* Find the freshly allocated block */
516 while (udf_next_aext(dir, &epos, &eloc, &elen, 1) ==
517 (EXT_RECORDED_ALLOCATED >> 30))
518 ;
519 block = eloc.logicalBlockNum + ((elen - 1) >>
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700520 dir->i_sb->s_blocksize_bits);
Jan Kara3bf25cb2007-05-08 00:35:16 -0700521 brelse(fibh->sbh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700522 fibh->sbh = fibh->ebh;
523 fi = (struct fileIdentDesc *)(fibh->sbh->b_data);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700524 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700525 fi = (struct fileIdentDesc *)
Marcin Slusarz4b111112008-02-08 04:20:36 -0800526 (fibh->sbh->b_data + sb->s_blocksize +
527 fibh->soffset);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700528 }
529 }
530
531 memset(cfi, 0, sizeof(struct fileIdentDesc));
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800532 if (UDF_SB(sb)->s_udfrev >= 0x0200)
Marcin Slusarz4b111112008-02-08 04:20:36 -0800533 udf_new_tag((char *)cfi, TAG_IDENT_FID, 3, 1, block,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200534 sizeof(struct tag));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700535 else
Marcin Slusarz4b111112008-02-08 04:20:36 -0800536 udf_new_tag((char *)cfi, TAG_IDENT_FID, 2, 1, block,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200537 sizeof(struct tag));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700538 cfi->fileVersionNum = cpu_to_le16(1);
539 cfi->lengthFileIdent = namelen;
540 cfi->lengthOfImpUse = cpu_to_le16(0);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700541 if (!udf_write_fi(dir, cfi, fi, fibh, NULL, name)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700542 dir->i_size += nfidlen;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800543 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
544 dinfo->i_lenAlloc += nfidlen;
Jan Kara2c948b32009-12-03 13:39:28 +0100545 else {
546 /* Find the last extent and truncate it to proper size */
547 while (udf_next_aext(dir, &epos, &eloc, &elen, 1) ==
548 (EXT_RECORDED_ALLOCATED >> 30))
549 ;
550 elen -= dinfo->i_lenExtents - dir->i_size;
551 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
552 epos.offset -= sizeof(struct short_ad);
553 else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
554 epos.offset -= sizeof(struct long_ad);
555 udf_write_aext(dir, &epos, &eloc, elen, 1);
556 dinfo->i_lenExtents = dir->i_size;
557 }
558
Linus Torvalds1da177e2005-04-16 15:20:36 -0700559 mark_inode_dirty(dir);
Jan Karab80697c2008-03-04 14:14:05 +0100560 goto out_ok;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700561 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700562 *err = -EIO;
Jan Karab80697c2008-03-04 14:14:05 +0100563 goto out_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700564 }
Jan Karab80697c2008-03-04 14:14:05 +0100565
566out_err:
567 fi = NULL;
568 if (fibh->sbh != fibh->ebh)
569 brelse(fibh->ebh);
570 brelse(fibh->sbh);
571out_ok:
572 brelse(epos.bh);
573 kfree(name);
574 return fi;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700575}
576
577static int udf_delete_entry(struct inode *inode, struct fileIdentDesc *fi,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700578 struct udf_fileident_bh *fibh,
579 struct fileIdentDesc *cfi)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700580{
581 cfi->fileCharacteristics |= FID_FILE_CHAR_DELETED;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700582
Linus Torvalds1da177e2005-04-16 15:20:36 -0700583 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT))
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200584 memset(&(cfi->icb), 0x00, sizeof(struct long_ad));
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700585
Linus Torvalds1da177e2005-04-16 15:20:36 -0700586 return udf_write_fi(inode, cfi, fi, fibh, NULL, NULL);
587}
588
Al Virod2be51c2014-09-04 09:34:14 -0400589static int udf_add_nondir(struct dentry *dentry, struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700590{
Al Virod2be51c2014-09-04 09:34:14 -0400591 struct udf_inode_info *iinfo = UDF_I(inode);
David Howells2b0143b2015-03-17 22:25:59 +0000592 struct inode *dir = d_inode(dentry->d_parent);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700593 struct udf_fileident_bh fibh;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700594 struct fileIdentDesc cfi, *fi;
595 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700596
Marcin Slusarz4b111112008-02-08 04:20:36 -0800597 fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
Al Virod2be51c2014-09-04 09:34:14 -0400598 if (unlikely(!fi)) {
Miklos Szeredi6d6b77f2011-10-28 14:13:28 +0200599 inode_dec_link_count(inode);
Al Virob2315092014-09-04 09:38:11 -0400600 unlock_new_inode(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700601 iput(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700602 return err;
603 }
604 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800605 cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700606 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800607 cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700608 udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
Jan Kara3adc12e2015-03-24 16:47:25 -0400609 dir->i_ctime = dir->i_mtime = current_fs_time(dir->i_sb);
610 mark_inode_dirty(dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700611 if (fibh.sbh != fibh.ebh)
Jan Kara3bf25cb2007-05-08 00:35:16 -0700612 brelse(fibh.ebh);
613 brelse(fibh.sbh);
Al Virob2315092014-09-04 09:38:11 -0400614 unlock_new_inode(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700615 d_instantiate(dentry, inode);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700616
Linus Torvalds1da177e2005-04-16 15:20:36 -0700617 return 0;
618}
619
Al Virod2be51c2014-09-04 09:34:14 -0400620static int udf_create(struct inode *dir, struct dentry *dentry, umode_t mode,
621 bool excl)
622{
Al Viro0b93a922014-09-04 09:47:41 -0400623 struct inode *inode = udf_new_inode(dir, mode);
Al Virod2be51c2014-09-04 09:34:14 -0400624
Al Viro0b93a922014-09-04 09:47:41 -0400625 if (IS_ERR(inode))
626 return PTR_ERR(inode);
Al Virod2be51c2014-09-04 09:34:14 -0400627
628 if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
629 inode->i_data.a_ops = &udf_adinicb_aops;
630 else
631 inode->i_data.a_ops = &udf_aops;
632 inode->i_op = &udf_file_inode_operations;
633 inode->i_fop = &udf_file_operations;
634 mark_inode_dirty(inode);
635
636 return udf_add_nondir(dentry, inode);
637}
638
Al Viro656d09d2013-06-12 09:35:33 +0400639static int udf_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode)
640{
Al Viro0b93a922014-09-04 09:47:41 -0400641 struct inode *inode = udf_new_inode(dir, mode);
Al Viro656d09d2013-06-12 09:35:33 +0400642
Al Viro0b93a922014-09-04 09:47:41 -0400643 if (IS_ERR(inode))
644 return PTR_ERR(inode);
Al Viro656d09d2013-06-12 09:35:33 +0400645
Al Viro0b93a922014-09-04 09:47:41 -0400646 if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
Al Viro656d09d2013-06-12 09:35:33 +0400647 inode->i_data.a_ops = &udf_adinicb_aops;
648 else
649 inode->i_data.a_ops = &udf_aops;
650 inode->i_op = &udf_file_inode_operations;
651 inode->i_fop = &udf_file_operations;
652 mark_inode_dirty(inode);
Al Viro656d09d2013-06-12 09:35:33 +0400653 d_tmpfile(dentry, inode);
Al Virob2315092014-09-04 09:38:11 -0400654 unlock_new_inode(inode);
Al Viro656d09d2013-06-12 09:35:33 +0400655 return 0;
656}
657
Al Viro1a67aaf2011-07-26 01:52:52 -0400658static int udf_mknod(struct inode *dir, struct dentry *dentry, umode_t mode,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700659 dev_t rdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700660{
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700661 struct inode *inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700662
663 if (!old_valid_dev(rdev))
664 return -EINVAL;
665
Al Viro0b93a922014-09-04 09:47:41 -0400666 inode = udf_new_inode(dir, mode);
667 if (IS_ERR(inode))
668 return PTR_ERR(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700669
Al Virod2be51c2014-09-04 09:34:14 -0400670 init_special_inode(inode, mode, rdev);
671 return udf_add_nondir(dentry, inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700672}
673
Al Viro18bb1db2011-07-26 01:41:39 -0400674static int udf_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700675{
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700676 struct inode *inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700677 struct udf_fileident_bh fibh;
678 struct fileIdentDesc cfi, *fi;
679 int err;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800680 struct udf_inode_info *dinfo = UDF_I(dir);
681 struct udf_inode_info *iinfo;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700682
Al Viro0b93a922014-09-04 09:47:41 -0400683 inode = udf_new_inode(dir, S_IFDIR | mode);
684 if (IS_ERR(inode))
685 return PTR_ERR(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700686
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800687 iinfo = UDF_I(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700688 inode->i_op = &udf_dir_inode_operations;
689 inode->i_fop = &udf_dir_operations;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800690 fi = udf_add_entry(inode, NULL, &fibh, &cfi, &err);
691 if (!fi) {
Miklos Szeredi6d6b77f2011-10-28 14:13:28 +0200692 inode_dec_link_count(inode);
Al Virob2315092014-09-04 09:38:11 -0400693 unlock_new_inode(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700694 iput(inode);
695 goto out;
696 }
Miklos Szeredibfe86842011-10-28 14:13:29 +0200697 set_nlink(inode, 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700698 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800699 cfi.icb.extLocation = cpu_to_lelb(dinfo->i_location);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700700 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800701 cpu_to_le32(dinfo->i_unique & 0x00000000FFFFFFFFUL);
Marcin Slusarz4b111112008-02-08 04:20:36 -0800702 cfi.fileCharacteristics =
703 FID_FILE_CHAR_DIRECTORY | FID_FILE_CHAR_PARENT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700704 udf_write_fi(inode, &cfi, fi, &fibh, NULL, NULL);
Jan Kara3bf25cb2007-05-08 00:35:16 -0700705 brelse(fibh.sbh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700706 mark_inode_dirty(inode);
707
Marcin Slusarz4b111112008-02-08 04:20:36 -0800708 fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
709 if (!fi) {
Miklos Szeredi6d6b77f2011-10-28 14:13:28 +0200710 clear_nlink(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700711 mark_inode_dirty(inode);
Al Virob2315092014-09-04 09:38:11 -0400712 unlock_new_inode(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700713 iput(inode);
714 goto out;
715 }
716 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800717 cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700718 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800719 cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700720 cfi.fileCharacteristics |= FID_FILE_CHAR_DIRECTORY;
721 udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
Dave Hansend8c76e62006-09-30 23:29:04 -0700722 inc_nlink(dir);
Jan Kara3adc12e2015-03-24 16:47:25 -0400723 dir->i_ctime = dir->i_mtime = current_fs_time(dir->i_sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700724 mark_inode_dirty(dir);
Al Virob2315092014-09-04 09:38:11 -0400725 unlock_new_inode(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700726 d_instantiate(dentry, inode);
727 if (fibh.sbh != fibh.ebh)
Jan Kara3bf25cb2007-05-08 00:35:16 -0700728 brelse(fibh.ebh);
729 brelse(fibh.sbh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700730 err = 0;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700731
732out:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700733 return err;
734}
735
736static int empty_dir(struct inode *dir)
737{
738 struct fileIdentDesc *fi, cfi;
739 struct udf_fileident_bh fibh;
740 loff_t f_pos;
Jan Karaaf793292008-02-08 04:20:50 -0800741 loff_t size = udf_ext0_offset(dir) + dir->i_size;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700742 int block;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200743 struct kernel_lb_addr eloc;
Jan Karaff116fc2007-05-08 00:35:14 -0700744 uint32_t elen;
Jan Kara60448b12007-05-08 00:35:13 -0700745 sector_t offset;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700746 struct extent_position epos = {};
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800747 struct udf_inode_info *dinfo = UDF_I(dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700748
Jan Karaaf793292008-02-08 04:20:50 -0800749 f_pos = udf_ext0_offset(dir);
750 fibh.soffset = fibh.eoffset = f_pos & (dir->i_sb->s_blocksize - 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700751
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800752 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700753 fibh.sbh = fibh.ebh = NULL;
Jan Karaaf793292008-02-08 04:20:50 -0800754 else if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits,
Marcin Slusarz4b111112008-02-08 04:20:36 -0800755 &epos, &eloc, &elen, &offset) ==
756 (EXT_RECORDED_ALLOCATED >> 30)) {
Pekka Enberg97e961f2008-10-15 12:29:03 +0200757 block = udf_get_lb_pblock(dir->i_sb, &eloc, offset);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700758 if ((++offset << dir->i_sb->s_blocksize_bits) < elen) {
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800759 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200760 epos.offset -= sizeof(struct short_ad);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800761 else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200762 epos.offset -= sizeof(struct long_ad);
Marcin Slusarz4b111112008-02-08 04:20:36 -0800763 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700764 offset = 0;
765
Marcin Slusarz4b111112008-02-08 04:20:36 -0800766 fibh.sbh = fibh.ebh = udf_tread(dir->i_sb, block);
767 if (!fibh.sbh) {
Jan Kara3bf25cb2007-05-08 00:35:16 -0700768 brelse(epos.bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700769 return 0;
770 }
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700771 } else {
Jan Kara3bf25cb2007-05-08 00:35:16 -0700772 brelse(epos.bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700773 return 0;
774 }
775
Jan Karaaf793292008-02-08 04:20:50 -0800776 while (f_pos < size) {
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700777 fi = udf_fileident_read(dir, &f_pos, &fibh, &cfi, &epos, &eloc,
778 &elen, &offset);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700779 if (!fi) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700780 if (fibh.sbh != fibh.ebh)
Jan Kara3bf25cb2007-05-08 00:35:16 -0700781 brelse(fibh.ebh);
782 brelse(fibh.sbh);
783 brelse(epos.bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700784 return 0;
785 }
786
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700787 if (cfi.lengthFileIdent &&
788 (cfi.fileCharacteristics & FID_FILE_CHAR_DELETED) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700789 if (fibh.sbh != fibh.ebh)
Jan Kara3bf25cb2007-05-08 00:35:16 -0700790 brelse(fibh.ebh);
791 brelse(fibh.sbh);
792 brelse(epos.bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700793 return 0;
794 }
795 }
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700796
Linus Torvalds1da177e2005-04-16 15:20:36 -0700797 if (fibh.sbh != fibh.ebh)
Jan Kara3bf25cb2007-05-08 00:35:16 -0700798 brelse(fibh.ebh);
799 brelse(fibh.sbh);
800 brelse(epos.bh);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700801
Linus Torvalds1da177e2005-04-16 15:20:36 -0700802 return 1;
803}
804
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700805static int udf_rmdir(struct inode *dir, struct dentry *dentry)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700806{
807 int retval;
David Howells2b0143b2015-03-17 22:25:59 +0000808 struct inode *inode = d_inode(dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700809 struct udf_fileident_bh fibh;
810 struct fileIdentDesc *fi, cfi;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200811 struct kernel_lb_addr tloc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700812
813 retval = -ENOENT;
Al Viro9fbb76c2008-10-12 00:15:17 -0400814 fi = udf_find_entry(dir, &dentry->d_name, &fibh, &cfi);
Fabian Frederick231473f2015-04-08 21:23:58 +0200815 if (IS_ERR_OR_NULL(fi)) {
816 if (fi)
817 retval = PTR_ERR(fi);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700818 goto out;
Fabian Frederick231473f2015-04-08 21:23:58 +0200819 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700820
821 retval = -EIO;
822 tloc = lelb_to_cpu(cfi.icb.extLocation);
Pekka Enberg97e961f2008-10-15 12:29:03 +0200823 if (udf_get_lb_pblock(dir->i_sb, &tloc, 0) != inode->i_ino)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700824 goto end_rmdir;
825 retval = -ENOTEMPTY;
826 if (!empty_dir(inode))
827 goto end_rmdir;
828 retval = udf_delete_entry(dir, fi, &fibh, &cfi);
829 if (retval)
830 goto end_rmdir;
831 if (inode->i_nlink != 2)
Joe Perchesa40ecd72011-10-10 01:08:04 -0700832 udf_warn(inode->i_sb, "empty directory has nlink != 2 (%d)\n",
833 inode->i_nlink);
Dave Hansence71ec32006-09-30 23:29:06 -0700834 clear_nlink(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700835 inode->i_size = 0;
Stephen Mollettc007c062007-05-08 00:31:31 -0700836 inode_dec_link_count(dir);
Marcin Slusarz4b111112008-02-08 04:20:36 -0800837 inode->i_ctime = dir->i_ctime = dir->i_mtime =
838 current_fs_time(dir->i_sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700839 mark_inode_dirty(dir);
840
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700841end_rmdir:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700842 if (fibh.sbh != fibh.ebh)
Jan Kara3bf25cb2007-05-08 00:35:16 -0700843 brelse(fibh.ebh);
844 brelse(fibh.sbh);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700845
846out:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700847 return retval;
848}
849
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700850static int udf_unlink(struct inode *dir, struct dentry *dentry)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700851{
852 int retval;
David Howells2b0143b2015-03-17 22:25:59 +0000853 struct inode *inode = d_inode(dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700854 struct udf_fileident_bh fibh;
855 struct fileIdentDesc *fi;
856 struct fileIdentDesc cfi;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200857 struct kernel_lb_addr tloc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700858
859 retval = -ENOENT;
Al Viro9fbb76c2008-10-12 00:15:17 -0400860 fi = udf_find_entry(dir, &dentry->d_name, &fibh, &cfi);
Fabian Frederick231473f2015-04-08 21:23:58 +0200861
862 if (IS_ERR_OR_NULL(fi)) {
863 if (fi)
864 retval = PTR_ERR(fi);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700865 goto out;
Fabian Frederick231473f2015-04-08 21:23:58 +0200866 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700867
868 retval = -EIO;
869 tloc = lelb_to_cpu(cfi.icb.extLocation);
Pekka Enberg97e961f2008-10-15 12:29:03 +0200870 if (udf_get_lb_pblock(dir->i_sb, &tloc, 0) != inode->i_ino)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700871 goto end_unlink;
872
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700873 if (!inode->i_nlink) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700874 udf_debug("Deleting nonexistent file (%lu), %d\n",
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700875 inode->i_ino, inode->i_nlink);
Miklos Szeredibfe86842011-10-28 14:13:29 +0200876 set_nlink(inode, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700877 }
878 retval = udf_delete_entry(dir, fi, &fibh, &cfi);
879 if (retval)
880 goto end_unlink;
881 dir->i_ctime = dir->i_mtime = current_fs_time(dir->i_sb);
882 mark_inode_dirty(dir);
Dave Hansen9a53c3a2006-09-30 23:29:03 -0700883 inode_dec_link_count(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700884 inode->i_ctime = dir->i_ctime;
885 retval = 0;
886
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700887end_unlink:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700888 if (fibh.sbh != fibh.ebh)
Jan Kara3bf25cb2007-05-08 00:35:16 -0700889 brelse(fibh.ebh);
890 brelse(fibh.sbh);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700891
892out:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700893 return retval;
894}
895
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700896static int udf_symlink(struct inode *dir, struct dentry *dentry,
897 const char *symname)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700898{
Al Viro0b93a922014-09-04 09:47:41 -0400899 struct inode *inode = udf_new_inode(dir, S_IFLNK | S_IRWXUGO);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700900 struct pathComponent *pc;
Al Viro391e8bb2010-01-31 21:28:48 -0500901 const char *compstart;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700902 struct extent_position epos = {};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700903 int eoffset, elen = 0;
Al Viro391e8bb2010-01-31 21:28:48 -0500904 uint8_t *ea;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700905 int err;
906 int block;
Al Viro391e8bb2010-01-31 21:28:48 -0500907 unsigned char *name = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700908 int namelen;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800909 struct udf_inode_info *iinfo;
Jan Karad664b6a2010-10-20 18:28:46 +0200910 struct super_block *sb = dir->i_sb;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700911
Al Viro0b93a922014-09-04 09:47:41 -0400912 if (IS_ERR(inode))
913 return PTR_ERR(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700914
Alessio Igor Bogani4d0fb622010-11-16 18:40:47 +0100915 iinfo = UDF_I(inode);
916 down_write(&iinfo->i_data_sem);
Jan Karab80697c2008-03-04 14:14:05 +0100917 name = kmalloc(UDF_NAME_LEN, GFP_NOFS);
918 if (!name) {
919 err = -ENOMEM;
920 goto out_no_entry;
921 }
922
Linus Torvalds1da177e2005-04-16 15:20:36 -0700923 inode->i_data.a_ops = &udf_symlink_aops;
Dmitry Monakhovc15d0fc2010-03-29 11:05:21 +0400924 inode->i_op = &udf_symlink_inode_operations;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700925
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800926 if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200927 struct kernel_lb_addr eloc;
Harvey Harrison78e917d2008-04-28 02:16:19 -0700928 uint32_t bsize;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700929
Jan Karad664b6a2010-10-20 18:28:46 +0200930 block = udf_new_block(sb, inode,
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800931 iinfo->i_location.partitionReferenceNum,
932 iinfo->i_location.logicalBlockNum, &err);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700933 if (!block)
934 goto out_no_entry;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800935 epos.block = iinfo->i_location;
Jan Karaff116fc2007-05-08 00:35:14 -0700936 epos.offset = udf_file_entry_alloc_offset(inode);
937 epos.bh = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700938 eloc.logicalBlockNum = block;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800939 eloc.partitionReferenceNum =
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800940 iinfo->i_location.partitionReferenceNum;
Jan Karad664b6a2010-10-20 18:28:46 +0200941 bsize = sb->s_blocksize;
Harvey Harrison78e917d2008-04-28 02:16:19 -0700942 iinfo->i_lenExtents = bsize;
Pekka Enberg97e961f2008-10-15 12:29:03 +0200943 udf_add_aext(inode, &epos, &eloc, bsize, 0);
Jan Kara3bf25cb2007-05-08 00:35:16 -0700944 brelse(epos.bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700945
Jan Karad664b6a2010-10-20 18:28:46 +0200946 block = udf_get_pblock(sb, block,
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800947 iinfo->i_location.partitionReferenceNum,
Marcin Slusarz4b111112008-02-08 04:20:36 -0800948 0);
Jan Karad664b6a2010-10-20 18:28:46 +0200949 epos.bh = udf_tgetblk(sb, block);
Jan Karaff116fc2007-05-08 00:35:14 -0700950 lock_buffer(epos.bh);
Jan Karad664b6a2010-10-20 18:28:46 +0200951 memset(epos.bh->b_data, 0x00, bsize);
Jan Karaff116fc2007-05-08 00:35:14 -0700952 set_buffer_uptodate(epos.bh);
953 unlock_buffer(epos.bh);
954 mark_buffer_dirty_inode(epos.bh, inode);
955 ea = epos.bh->b_data + udf_ext0_offset(inode);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800956 } else
957 ea = iinfo->i_ext.i_data + iinfo->i_lenEAttr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700958
Jan Karad664b6a2010-10-20 18:28:46 +0200959 eoffset = sb->s_blocksize - udf_ext0_offset(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700960 pc = (struct pathComponent *)ea;
961
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700962 if (*symname == '/') {
963 do {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700964 symname++;
965 } while (*symname == '/');
966
967 pc->componentType = 1;
968 pc->lengthComponentIdent = 0;
969 pc->componentFileVersionNum = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700970 elen += sizeof(struct pathComponent);
971 }
972
973 err = -ENAMETOOLONG;
974
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700975 while (*symname) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700976 if (elen + sizeof(struct pathComponent) > eoffset)
977 goto out_no_entry;
978
979 pc = (struct pathComponent *)(ea + elen);
980
Al Viro391e8bb2010-01-31 21:28:48 -0500981 compstart = symname;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700982
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700983 do {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700984 symname++;
985 } while (*symname && *symname != '/');
986
987 pc->componentType = 5;
988 pc->lengthComponentIdent = 0;
989 pc->componentFileVersionNum = 0;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700990 if (compstart[0] == '.') {
991 if ((symname - compstart) == 1)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700992 pc->componentType = 4;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800993 else if ((symname - compstart) == 2 &&
994 compstart[1] == '.')
Linus Torvalds1da177e2005-04-16 15:20:36 -0700995 pc->componentType = 3;
996 }
997
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700998 if (pc->componentType == 5) {
Jan Karad664b6a2010-10-20 18:28:46 +0200999 namelen = udf_put_filename(sb, compstart, name,
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001000 symname - compstart);
1001 if (!namelen)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001002 goto out_no_entry;
1003
Marcin Slusarz4b111112008-02-08 04:20:36 -08001004 if (elen + sizeof(struct pathComponent) + namelen >
1005 eoffset)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001006 goto out_no_entry;
1007 else
1008 pc->lengthComponentIdent = namelen;
1009
1010 memcpy(pc->componentIdent, name, namelen);
1011 }
1012
1013 elen += sizeof(struct pathComponent) + pc->lengthComponentIdent;
1014
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001015 if (*symname) {
1016 do {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001017 symname++;
1018 } while (*symname == '/');
1019 }
1020 }
1021
Jan Kara3bf25cb2007-05-08 00:35:16 -07001022 brelse(epos.bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001023 inode->i_size = elen;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001024 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
1025 iinfo->i_lenAlloc = inode->i_size;
Jan Kara2c948b32009-12-03 13:39:28 +01001026 else
1027 udf_truncate_tail_extent(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001028 mark_inode_dirty(inode);
Jan Kara4ea77722013-12-23 22:02:16 +01001029 up_write(&iinfo->i_data_sem);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001030
Al Virod2be51c2014-09-04 09:34:14 -04001031 err = udf_add_nondir(dentry, inode);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001032out:
Jan Karab80697c2008-03-04 14:14:05 +01001033 kfree(name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001034 return err;
1035
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001036out_no_entry:
Alessio Igor Bogani4d0fb622010-11-16 18:40:47 +01001037 up_write(&iinfo->i_data_sem);
Dave Hansen9a53c3a2006-09-30 23:29:03 -07001038 inode_dec_link_count(inode);
Al Virob2315092014-09-04 09:38:11 -04001039 unlock_new_inode(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{
David Howells2b0143b2015-03-17 22:25:59 +00001047 struct inode *inode = d_inode(old_dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001048 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);
Jan Kara3adc12e2015-03-24 16:47:25 -04001072 dir->i_ctime = dir->i_mtime = current_fs_time(dir->i_sb);
1073 mark_inode_dirty(dir);
Al Viro7de9c6ee2010-10-23 11:11:40 -04001074 ihold(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001075 d_instantiate(dentry, inode);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001076
Linus Torvalds1da177e2005-04-16 15:20:36 -07001077 return 0;
1078}
1079
1080/* Anybody can rename anything with this: the permission checks are left to the
1081 * higher-level routines.
1082 */
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001083static int udf_rename(struct inode *old_dir, struct dentry *old_dentry,
1084 struct inode *new_dir, struct dentry *new_dentry)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001085{
David Howells2b0143b2015-03-17 22:25:59 +00001086 struct inode *old_inode = d_inode(old_dentry);
1087 struct inode *new_inode = d_inode(new_dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001088 struct udf_fileident_bh ofibh, nfibh;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001089 struct fileIdentDesc *ofi = NULL, *nfi = NULL, *dir_fi = NULL;
1090 struct fileIdentDesc ocfi, ncfi;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001091 struct buffer_head *dir_bh = NULL;
1092 int retval = -ENOENT;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001093 struct kernel_lb_addr tloc;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001094 struct udf_inode_info *old_iinfo = UDF_I(old_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001095
Al Viro9fbb76c2008-10-12 00:15:17 -04001096 ofi = udf_find_entry(old_dir, &old_dentry->d_name, &ofibh, &ocfi);
Fabian Frederick231473f2015-04-08 21:23:58 +02001097 if (IS_ERR(ofi)) {
1098 retval = PTR_ERR(ofi);
1099 goto end_rename;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001100 }
Fabian Frederick231473f2015-04-08 21:23:58 +02001101
1102 if (ofibh.sbh != ofibh.ebh)
1103 brelse(ofibh.ebh);
1104
1105 brelse(ofibh.sbh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001106 tloc = lelb_to_cpu(ocfi.icb.extLocation);
Pekka Enberg97e961f2008-10-15 12:29:03 +02001107 if (!ofi || udf_get_lb_pblock(old_dir->i_sb, &tloc, 0)
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001108 != old_inode->i_ino)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001109 goto end_rename;
1110
Al Viro9fbb76c2008-10-12 00:15:17 -04001111 nfi = udf_find_entry(new_dir, &new_dentry->d_name, &nfibh, &ncfi);
Fabian Frederick231473f2015-04-08 21:23:58 +02001112 if (IS_ERR(nfi)) {
1113 retval = PTR_ERR(nfi);
1114 goto end_rename;
1115 }
1116 if (nfi && !new_inode) {
1117 if (nfibh.sbh != nfibh.ebh)
1118 brelse(nfibh.ebh);
1119 brelse(nfibh.sbh);
1120 nfi = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001121 }
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001122 if (S_ISDIR(old_inode->i_mode)) {
Marcin Slusarz7f3fbd02008-02-08 04:20:49 -08001123 int offset = udf_ext0_offset(old_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001124
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001125 if (new_inode) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001126 retval = -ENOTEMPTY;
1127 if (!empty_dir(new_inode))
1128 goto end_rename;
1129 }
1130 retval = -EIO;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001131 if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001132 dir_fi = udf_get_fileident(
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001133 old_iinfo->i_ext.i_data -
1134 (old_iinfo->i_efe ?
Marcin Slusarz4b111112008-02-08 04:20:36 -08001135 sizeof(struct extendedFileEntry) :
1136 sizeof(struct fileEntry)),
1137 old_inode->i_sb->s_blocksize, &offset);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001138 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001139 dir_bh = udf_bread(old_inode, 0, 0, &retval);
1140 if (!dir_bh)
1141 goto end_rename;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001142 dir_fi = udf_get_fileident(dir_bh->b_data,
1143 old_inode->i_sb->s_blocksize, &offset);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001144 }
1145 if (!dir_fi)
1146 goto end_rename;
1147 tloc = lelb_to_cpu(dir_fi->icb.extLocation);
Pekka Enberg97e961f2008-10-15 12:29:03 +02001148 if (udf_get_lb_pblock(old_inode->i_sb, &tloc, 0) !=
Marcin Slusarz4b111112008-02-08 04:20:36 -08001149 old_dir->i_ino)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001150 goto end_rename;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001151 }
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001152 if (!nfi) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001153 nfi = udf_add_entry(new_dir, new_dentry, &nfibh, &ncfi,
1154 &retval);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001155 if (!nfi)
1156 goto end_rename;
1157 }
1158
1159 /*
1160 * Like most other Unix systems, set the ctime for inodes on a
1161 * rename.
1162 */
1163 old_inode->i_ctime = current_fs_time(old_inode->i_sb);
1164 mark_inode_dirty(old_inode);
1165
1166 /*
1167 * ok, that's it
1168 */
1169 ncfi.fileVersionNum = ocfi.fileVersionNum;
1170 ncfi.fileCharacteristics = ocfi.fileCharacteristics;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001171 memcpy(&(ncfi.icb), &(ocfi.icb), sizeof(struct long_ad));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001172 udf_write_fi(new_dir, &ncfi, nfi, &nfibh, NULL, NULL);
1173
1174 /* The old fid may have moved - find it again */
Al Viro9fbb76c2008-10-12 00:15:17 -04001175 ofi = udf_find_entry(old_dir, &old_dentry->d_name, &ofibh, &ocfi);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001176 udf_delete_entry(old_dir, ofi, &ofibh, &ocfi);
1177
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001178 if (new_inode) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001179 new_inode->i_ctime = current_fs_time(new_inode->i_sb);
Dave Hansen9a53c3a2006-09-30 23:29:03 -07001180 inode_dec_link_count(new_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001181 }
1182 old_dir->i_ctime = old_dir->i_mtime = current_fs_time(old_dir->i_sb);
Jan Kara3adc12e2015-03-24 16:47:25 -04001183 new_dir->i_ctime = new_dir->i_mtime = current_fs_time(new_dir->i_sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001184 mark_inode_dirty(old_dir);
Jan Kara3adc12e2015-03-24 16:47:25 -04001185 mark_inode_dirty(new_dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001186
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001187 if (dir_fi) {
Marcin Slusarzc0b34432008-02-08 04:20:42 -08001188 dir_fi->icb.extLocation = cpu_to_lelb(UDF_I(new_dir)->i_location);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001189 udf_update_tag((char *)dir_fi,
1190 (sizeof(struct fileIdentDesc) +
1191 le16_to_cpu(dir_fi->lengthOfImpUse) + 3) & ~3);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001192 if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001193 mark_inode_dirty(old_inode);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001194 else
Linus Torvalds1da177e2005-04-16 15:20:36 -07001195 mark_buffer_dirty_inode(dir_bh, old_inode);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001196
Dave Hansen9a53c3a2006-09-30 23:29:03 -07001197 inode_dec_link_count(old_dir);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001198 if (new_inode)
Dave Hansen9a53c3a2006-09-30 23:29:03 -07001199 inode_dec_link_count(new_inode);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001200 else {
Dave Hansend8c76e62006-09-30 23:29:04 -07001201 inc_nlink(new_dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001202 mark_inode_dirty(new_dir);
1203 }
1204 }
1205
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001206 if (ofi) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001207 if (ofibh.sbh != ofibh.ebh)
Jan Kara3bf25cb2007-05-08 00:35:16 -07001208 brelse(ofibh.ebh);
1209 brelse(ofibh.sbh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001210 }
1211
1212 retval = 0;
1213
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001214end_rename:
Jan Kara3bf25cb2007-05-08 00:35:16 -07001215 brelse(dir_bh);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001216 if (nfi) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001217 if (nfibh.sbh != nfibh.ebh)
Jan Kara3bf25cb2007-05-08 00:35:16 -07001218 brelse(nfibh.ebh);
1219 brelse(nfibh.sbh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001220 }
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001221
Linus Torvalds1da177e2005-04-16 15:20:36 -07001222 return retval;
1223}
1224
Rasmus Rohde221e5832008-04-30 17:22:06 +02001225static struct dentry *udf_get_parent(struct dentry *child)
1226{
Pekka Enberg97e961f2008-10-15 12:29:03 +02001227 struct kernel_lb_addr tloc;
Rasmus Rohde221e5832008-04-30 17:22:06 +02001228 struct inode *inode = NULL;
Linus Torvalds26fe5752012-05-10 13:14:12 -07001229 struct qstr dotdot = QSTR_INIT("..", 2);
Rasmus Rohde221e5832008-04-30 17:22:06 +02001230 struct fileIdentDesc cfi;
1231 struct udf_fileident_bh fibh;
1232
David Howells2b0143b2015-03-17 22:25:59 +00001233 if (!udf_find_entry(d_inode(child), &dotdot, &fibh, &cfi))
Jan Kara6d3d5e82014-09-04 16:15:51 +02001234 return ERR_PTR(-EACCES);
Rasmus Rohde221e5832008-04-30 17:22:06 +02001235
1236 if (fibh.sbh != fibh.ebh)
1237 brelse(fibh.ebh);
1238 brelse(fibh.sbh);
1239
Pekka Enberg97e961f2008-10-15 12:29:03 +02001240 tloc = lelb_to_cpu(cfi.icb.extLocation);
David Howells2b0143b2015-03-17 22:25:59 +00001241 inode = udf_iget(d_inode(child)->i_sb, &tloc);
Jan Kara6d3d5e82014-09-04 16:15:51 +02001242 if (IS_ERR(inode))
1243 return ERR_CAST(inode);
Rasmus Rohde221e5832008-04-30 17:22:06 +02001244
Christoph Hellwig44003722008-08-11 15:49:04 +02001245 return d_obtain_alias(inode);
Rasmus Rohde221e5832008-04-30 17:22:06 +02001246}
1247
1248
1249static struct dentry *udf_nfs_get_inode(struct super_block *sb, u32 block,
1250 u16 partref, __u32 generation)
1251{
1252 struct inode *inode;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001253 struct kernel_lb_addr loc;
Rasmus Rohde221e5832008-04-30 17:22:06 +02001254
1255 if (block == 0)
1256 return ERR_PTR(-ESTALE);
1257
1258 loc.logicalBlockNum = block;
1259 loc.partitionReferenceNum = partref;
Pekka Enberg97e961f2008-10-15 12:29:03 +02001260 inode = udf_iget(sb, &loc);
Rasmus Rohde221e5832008-04-30 17:22:06 +02001261
Jan Kara6d3d5e82014-09-04 16:15:51 +02001262 if (IS_ERR(inode))
1263 return ERR_CAST(inode);
Rasmus Rohde221e5832008-04-30 17:22:06 +02001264
1265 if (generation && inode->i_generation != generation) {
1266 iput(inode);
1267 return ERR_PTR(-ESTALE);
1268 }
Christoph Hellwig44003722008-08-11 15:49:04 +02001269 return d_obtain_alias(inode);
Rasmus Rohde221e5832008-04-30 17:22:06 +02001270}
1271
1272static struct dentry *udf_fh_to_dentry(struct super_block *sb,
1273 struct fid *fid, int fh_len, int fh_type)
1274{
NeilBrown92acca42015-05-08 10:16:23 +10001275 if (fh_len < 3 ||
Rasmus Rohde221e5832008-04-30 17:22:06 +02001276 (fh_type != FILEID_UDF_WITH_PARENT &&
1277 fh_type != FILEID_UDF_WITHOUT_PARENT))
1278 return NULL;
1279
1280 return udf_nfs_get_inode(sb, fid->udf.block, fid->udf.partref,
1281 fid->udf.generation);
1282}
1283
1284static struct dentry *udf_fh_to_parent(struct super_block *sb,
1285 struct fid *fid, int fh_len, int fh_type)
1286{
NeilBrown92acca42015-05-08 10:16:23 +10001287 if (fh_len < 5 || fh_type != FILEID_UDF_WITH_PARENT)
Rasmus Rohde221e5832008-04-30 17:22:06 +02001288 return NULL;
1289
1290 return udf_nfs_get_inode(sb, fid->udf.parent_block,
1291 fid->udf.parent_partref,
1292 fid->udf.parent_generation);
1293}
Al Virob0b03822012-04-02 14:34:06 -04001294static int udf_encode_fh(struct inode *inode, __u32 *fh, int *lenp,
1295 struct inode *parent)
Rasmus Rohde221e5832008-04-30 17:22:06 +02001296{
1297 int len = *lenp;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001298 struct kernel_lb_addr location = UDF_I(inode)->i_location;
Rasmus Rohde221e5832008-04-30 17:22:06 +02001299 struct fid *fid = (struct fid *)fh;
1300 int type = FILEID_UDF_WITHOUT_PARENT;
1301
Al Virob0b03822012-04-02 14:34:06 -04001302 if (parent && (len < 5)) {
Aneesh Kumar K.V5fe0c232011-01-29 18:43:25 +05301303 *lenp = 5;
Namjae Jeon94e07a752013-02-17 15:48:11 +09001304 return FILEID_INVALID;
Aneesh Kumar K.V5fe0c232011-01-29 18:43:25 +05301305 } else if (len < 3) {
1306 *lenp = 3;
Namjae Jeon94e07a752013-02-17 15:48:11 +09001307 return FILEID_INVALID;
Aneesh Kumar K.V5fe0c232011-01-29 18:43:25 +05301308 }
Rasmus Rohde221e5832008-04-30 17:22:06 +02001309
1310 *lenp = 3;
1311 fid->udf.block = location.logicalBlockNum;
1312 fid->udf.partref = location.partitionReferenceNum;
Mathias Krause0143fc52012-07-12 08:46:55 +02001313 fid->udf.parent_partref = 0;
Rasmus Rohde221e5832008-04-30 17:22:06 +02001314 fid->udf.generation = inode->i_generation;
1315
Al Virob0b03822012-04-02 14:34:06 -04001316 if (parent) {
1317 location = UDF_I(parent)->i_location;
Rasmus Rohde221e5832008-04-30 17:22:06 +02001318 fid->udf.parent_block = location.logicalBlockNum;
1319 fid->udf.parent_partref = location.partitionReferenceNum;
1320 fid->udf.parent_generation = inode->i_generation;
Rasmus Rohde221e5832008-04-30 17:22:06 +02001321 *lenp = 5;
1322 type = FILEID_UDF_WITH_PARENT;
1323 }
1324
1325 return type;
1326}
1327
1328const struct export_operations udf_export_ops = {
1329 .encode_fh = udf_encode_fh,
1330 .fh_to_dentry = udf_fh_to_dentry,
1331 .fh_to_parent = udf_fh_to_parent,
1332 .get_parent = udf_get_parent,
1333};
1334
Arjan van de Venc5ef1c42007-02-12 00:55:40 -08001335const struct inode_operations udf_dir_inode_operations = {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001336 .lookup = udf_lookup,
1337 .create = udf_create,
1338 .link = udf_link,
1339 .unlink = udf_unlink,
1340 .symlink = udf_symlink,
1341 .mkdir = udf_mkdir,
1342 .rmdir = udf_rmdir,
1343 .mknod = udf_mknod,
1344 .rename = udf_rename,
Al Viro656d09d2013-06-12 09:35:33 +04001345 .tmpfile = udf_tmpfile,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001346};
Dmitry Monakhovc15d0fc2010-03-29 11:05:21 +04001347const struct inode_operations udf_symlink_inode_operations = {
1348 .readlink = generic_readlink,
1349 .follow_link = page_follow_link_light,
1350 .put_link = page_put_link,
Dmitry Monakhovc15d0fc2010-03-29 11:05:21 +04001351};