blob: a2ba11eca9955ea873b25e93075273d2e7837ed8 [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;
Jan Kara066b9cd2016-01-26 21:07:30 +0100168 unsigned char *fname = NULL, *copy_name = NULL;
Al Viro391e8bb2010-01-31 21:28:48 -0500169 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 {
Jan Kara066b9cd2016-01-26 21:07:30 +0100239 if (!copy_name) {
240 copy_name = kmalloc(UDF_NAME_LEN,
241 GFP_NOFS);
242 if (!copy_name) {
243 fi = ERR_PTR(-ENOMEM);
244 goto out_err;
245 }
246 }
247 nameptr = copy_name;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800248 memcpy(nameptr, fi->fileIdent + liu,
249 lfi - poffset);
250 memcpy(nameptr + lfi - poffset,
251 fibh->ebh->b_data, poffset);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700252 }
253 }
254
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700255 if ((cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) {
Jan Kara3ee30392014-12-18 22:49:12 +0100256 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_UNDELETE))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257 continue;
258 }
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700259
260 if ((cfi->fileCharacteristics & FID_FILE_CHAR_HIDDEN) != 0) {
Jan Kara3ee30392014-12-18 22:49:12 +0100261 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_UNHIDE))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700262 continue;
263 }
264
Rasmus Rohde221e5832008-04-30 17:22:06 +0200265 if ((cfi->fileCharacteristics & FID_FILE_CHAR_PARENT) &&
Jesper Juhla4264b32010-12-12 23:18:15 +0100266 isdotdot)
267 goto out_ok;
Rasmus Rohde221e5832008-04-30 17:22:06 +0200268
Linus Torvalds1da177e2005-04-16 15:20:36 -0700269 if (!lfi)
270 continue;
271
Jan Kara3ee30392014-12-18 22:49:12 +0100272 flen = udf_get_filename(sb, nameptr, lfi, fname, UDF_NAME_LEN);
Fabian Frederick231473f2015-04-08 21:23:58 +0200273 if (flen < 0) {
274 fi = ERR_PTR(flen);
275 goto out_err;
276 }
277
278 if (udf_match(flen, fname, child->len, child->name))
Jan Karab80697c2008-03-04 14:14:05 +0100279 goto out_ok;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280 }
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700281
Jan Karab80697c2008-03-04 14:14:05 +0100282 fi = NULL;
Fabian Frederick231473f2015-04-08 21:23:58 +0200283out_err:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700284 if (fibh->sbh != fibh->ebh)
Jan Kara3bf25cb2007-05-08 00:35:16 -0700285 brelse(fibh->ebh);
286 brelse(fibh->sbh);
Jan Karab80697c2008-03-04 14:14:05 +0100287out_ok:
Jan Kara3bf25cb2007-05-08 00:35:16 -0700288 brelse(epos.bh);
Jan Karab80697c2008-03-04 14:14:05 +0100289 kfree(fname);
Jan Kara066b9cd2016-01-26 21:07:30 +0100290 kfree(copy_name);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700291
Jan Karab80697c2008-03-04 14:14:05 +0100292 return fi;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293}
294
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700295static struct dentry *udf_lookup(struct inode *dir, struct dentry *dentry,
Al Viro00cd8dd2012-06-10 17:13:09 -0400296 unsigned int flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700297{
298 struct inode *inode = NULL;
Jayachandran Cdb9a3692006-02-03 03:04:50 -0800299 struct fileIdentDesc cfi;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300 struct udf_fileident_bh fibh;
Fabian Frederick231473f2015-04-08 21:23:58 +0200301 struct fileIdentDesc *fi;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700302
Andrew Gabbasov9fba7052016-01-15 02:44:21 -0600303 if (dentry->d_name.len > UDF_NAME_LEN)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304 return ERR_PTR(-ENAMETOOLONG);
305
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306#ifdef UDF_RECOVERY
307 /* temporary shorthand for specifying files by inode number */
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700308 if (!strncmp(dentry->d_name.name, ".B=", 3)) {
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200309 struct kernel_lb_addr lb = {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700310 .logicalBlockNum = 0,
Marcin Slusarz4b111112008-02-08 04:20:36 -0800311 .partitionReferenceNum =
312 simple_strtoul(dentry->d_name.name + 3,
313 NULL, 0),
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700314 };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700315 inode = udf_iget(dir->i_sb, lb);
Jan Kara6d3d5e82014-09-04 16:15:51 +0200316 if (IS_ERR(inode))
317 return inode;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800318 } else
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700319#endif /* UDF_RECOVERY */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320
Fabian Frederick231473f2015-04-08 21:23:58 +0200321 fi = udf_find_entry(dir, &dentry->d_name, &fibh, &cfi);
322 if (IS_ERR(fi))
323 return ERR_CAST(fi);
324
325 if (fi) {
Pekka Enberg97e961f2008-10-15 12:29:03 +0200326 struct kernel_lb_addr loc;
327
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328 if (fibh.sbh != fibh.ebh)
Jan Kara3bf25cb2007-05-08 00:35:16 -0700329 brelse(fibh.ebh);
330 brelse(fibh.sbh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700331
Pekka Enberg97e961f2008-10-15 12:29:03 +0200332 loc = lelb_to_cpu(cfi.icb.extLocation);
333 inode = udf_iget(dir->i_sb, &loc);
Jan Kara6d3d5e82014-09-04 16:15:51 +0200334 if (IS_ERR(inode))
335 return ERR_CAST(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336 }
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700337
Rasmus Rohde221e5832008-04-30 17:22:06 +0200338 return d_splice_alias(inode, dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339}
340
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700341static struct fileIdentDesc *udf_add_entry(struct inode *dir,
342 struct dentry *dentry,
343 struct udf_fileident_bh *fibh,
344 struct fileIdentDesc *cfi, int *err)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700345{
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800346 struct super_block *sb = dir->i_sb;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700347 struct fileIdentDesc *fi = NULL;
Al Viro391e8bb2010-01-31 21:28:48 -0500348 unsigned char *name = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349 int namelen;
350 loff_t f_pos;
Jan Karaaf793292008-02-08 04:20:50 -0800351 loff_t size = udf_ext0_offset(dir) + dir->i_size;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700352 int nfidlen;
353 uint8_t lfi;
354 uint16_t liu;
355 int block;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200356 struct kernel_lb_addr eloc;
Jan Kara9afadc42008-05-06 18:26:17 +0200357 uint32_t elen = 0;
Jan Kara60448b12007-05-08 00:35:13 -0700358 sector_t offset;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700359 struct extent_position epos = {};
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800360 struct udf_inode_info *dinfo;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361
Jan Karab80697c2008-03-04 14:14:05 +0100362 fibh->sbh = fibh->ebh = NULL;
Andrew Gabbasov9fba7052016-01-15 02:44:21 -0600363 name = kmalloc(UDF_NAME_LEN_CS0, GFP_NOFS);
Jan Karab80697c2008-03-04 14:14:05 +0100364 if (!name) {
365 *err = -ENOMEM;
366 goto out_err;
367 }
368
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700369 if (dentry) {
370 if (!dentry->d_name.len) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700371 *err = -EINVAL;
Jan Karab80697c2008-03-04 14:14:05 +0100372 goto out_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700373 }
Andrew Gabbasov525e2c52016-01-15 02:44:19 -0600374 namelen = udf_put_filename(sb, dentry->d_name.name,
375 dentry->d_name.len,
Andrew Gabbasov9fba7052016-01-15 02:44:21 -0600376 name, UDF_NAME_LEN_CS0);
Marcin Slusarz4b111112008-02-08 04:20:36 -0800377 if (!namelen) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378 *err = -ENAMETOOLONG;
Jan Karab80697c2008-03-04 14:14:05 +0100379 goto out_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380 }
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700381 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382 namelen = 0;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700383 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700384
385 nfidlen = (sizeof(struct fileIdentDesc) + namelen + 3) & ~3;
386
Jan Karaaf793292008-02-08 04:20:50 -0800387 f_pos = udf_ext0_offset(dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388
Jan Karaaf793292008-02-08 04:20:50 -0800389 fibh->soffset = fibh->eoffset = f_pos & (dir->i_sb->s_blocksize - 1);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800390 dinfo = UDF_I(dir);
Jan Karab80697c2008-03-04 14:14:05 +0100391 if (dinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
392 if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits, &epos,
393 &eloc, &elen, &offset) != (EXT_RECORDED_ALLOCATED >> 30)) {
394 block = udf_get_lb_pblock(dir->i_sb,
Pekka Enberg97e961f2008-10-15 12:29:03 +0200395 &dinfo->i_location, 0);
Jan Karab80697c2008-03-04 14:14:05 +0100396 fibh->soffset = fibh->eoffset = sb->s_blocksize;
397 goto add;
398 }
Pekka Enberg97e961f2008-10-15 12:29:03 +0200399 block = udf_get_lb_pblock(dir->i_sb, &eloc, offset);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700400 if ((++offset << dir->i_sb->s_blocksize_bits) < elen) {
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800401 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200402 epos.offset -= sizeof(struct short_ad);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800403 else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200404 epos.offset -= sizeof(struct long_ad);
Marcin Slusarz4b111112008-02-08 04:20:36 -0800405 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406 offset = 0;
407
Marcin Slusarz4b111112008-02-08 04:20:36 -0800408 fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block);
409 if (!fibh->sbh) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410 *err = -EIO;
Jan Karab80697c2008-03-04 14:14:05 +0100411 goto out_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700412 }
413
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800414 block = dinfo->i_location.logicalBlockNum;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700415 }
416
Jan Karaaf793292008-02-08 04:20:50 -0800417 while (f_pos < size) {
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700418 fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc,
419 &elen, &offset);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700420
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700421 if (!fi) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700422 *err = -EIO;
Jan Karab80697c2008-03-04 14:14:05 +0100423 goto out_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424 }
425
426 liu = le16_to_cpu(cfi->lengthOfImpUse);
427 lfi = cfi->lengthFileIdent;
428
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700429 if ((cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) {
Marcin Slusarz4b111112008-02-08 04:20:36 -0800430 if (((sizeof(struct fileIdentDesc) +
431 liu + lfi + 3) & ~3) == nfidlen) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700432 cfi->descTag.tagSerialNum = cpu_to_le16(1);
433 cfi->fileVersionNum = cpu_to_le16(1);
434 cfi->fileCharacteristics = 0;
435 cfi->lengthFileIdent = namelen;
436 cfi->lengthOfImpUse = cpu_to_le16(0);
Marcin Slusarz4b111112008-02-08 04:20:36 -0800437 if (!udf_write_fi(dir, cfi, fi, fibh, NULL,
438 name))
Jan Karab80697c2008-03-04 14:14:05 +0100439 goto out_ok;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800440 else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700441 *err = -EIO;
Jan Karab80697c2008-03-04 14:14:05 +0100442 goto out_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700443 }
444 }
445 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700446 }
447
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700448add:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700449 f_pos += nfidlen;
450
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800451 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB &&
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700452 sb->s_blocksize - fibh->eoffset < nfidlen) {
Jan Kara3bf25cb2007-05-08 00:35:16 -0700453 brelse(epos.bh);
Jan Karaff116fc2007-05-08 00:35:14 -0700454 epos.bh = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700455 fibh->soffset -= udf_ext0_offset(dir);
456 fibh->eoffset -= udf_ext0_offset(dir);
Jan Karaaf793292008-02-08 04:20:50 -0800457 f_pos -= udf_ext0_offset(dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700458 if (fibh->sbh != fibh->ebh)
Jan Kara3bf25cb2007-05-08 00:35:16 -0700459 brelse(fibh->ebh);
460 brelse(fibh->sbh);
Marcin Slusarz4b111112008-02-08 04:20:36 -0800461 fibh->sbh = fibh->ebh =
462 udf_expand_dir_adinicb(dir, &block, err);
463 if (!fibh->sbh)
Jan Karab80697c2008-03-04 14:14:05 +0100464 goto out_err;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800465 epos.block = dinfo->i_location;
Jan Karaff116fc2007-05-08 00:35:14 -0700466 epos.offset = udf_file_entry_alloc_offset(dir);
Jan Kara05343c42008-02-08 04:20:51 -0800467 /* Load extent udf_expand_dir_adinicb() has created */
468 udf_current_aext(dir, &epos, &eloc, &elen, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469 }
470
Jan Kara2c948b32009-12-03 13:39:28 +0100471 /* Entry fits into current block? */
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700472 if (sb->s_blocksize - fibh->eoffset >= nfidlen) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473 fibh->soffset = fibh->eoffset;
474 fibh->eoffset += nfidlen;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700475 if (fibh->sbh != fibh->ebh) {
Jan Kara3bf25cb2007-05-08 00:35:16 -0700476 brelse(fibh->sbh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700477 fibh->sbh = fibh->ebh;
478 }
479
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800480 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
481 block = dinfo->i_location.logicalBlockNum;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800482 fi = (struct fileIdentDesc *)
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800483 (dinfo->i_ext.i_data +
Marcin Slusarzc0b34432008-02-08 04:20:42 -0800484 fibh->soffset -
Marcin Slusarz4b111112008-02-08 04:20:36 -0800485 udf_ext0_offset(dir) +
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800486 dinfo->i_lenEAttr);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700487 } else {
Marcin Slusarz4b111112008-02-08 04:20:36 -0800488 block = eloc.logicalBlockNum +
489 ((elen - 1) >>
490 dir->i_sb->s_blocksize_bits);
491 fi = (struct fileIdentDesc *)
492 (fibh->sbh->b_data + fibh->soffset);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700493 }
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700494 } else {
Jan Kara2c948b32009-12-03 13:39:28 +0100495 /* Round up last extent in the file */
496 elen = (elen + sb->s_blocksize - 1) & ~(sb->s_blocksize - 1);
497 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
498 epos.offset -= sizeof(struct short_ad);
499 else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
500 epos.offset -= sizeof(struct long_ad);
501 udf_write_aext(dir, &epos, &eloc, elen, 1);
502 dinfo->i_lenExtents = (dinfo->i_lenExtents + sb->s_blocksize
503 - 1) & ~(sb->s_blocksize - 1);
504
Linus Torvalds1da177e2005-04-16 15:20:36 -0700505 fibh->soffset = fibh->eoffset - sb->s_blocksize;
506 fibh->eoffset += nfidlen - sb->s_blocksize;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700507 if (fibh->sbh != fibh->ebh) {
Jan Kara3bf25cb2007-05-08 00:35:16 -0700508 brelse(fibh->sbh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509 fibh->sbh = fibh->ebh;
510 }
511
512 block = eloc.logicalBlockNum + ((elen - 1) >>
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700513 dir->i_sb->s_blocksize_bits);
Marcin Slusarz4b111112008-02-08 04:20:36 -0800514 fibh->ebh = udf_bread(dir,
Jan Karaaf793292008-02-08 04:20:50 -0800515 f_pos >> dir->i_sb->s_blocksize_bits, 1, err);
Jan Karab80697c2008-03-04 14:14:05 +0100516 if (!fibh->ebh)
517 goto out_err;
Jan Kara4651c592010-11-25 03:56:24 +0100518 /* Extents could have been merged, invalidate our position */
519 brelse(epos.bh);
520 epos.bh = NULL;
521 epos.block = dinfo->i_location;
522 epos.offset = udf_file_entry_alloc_offset(dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700523
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700524 if (!fibh->soffset) {
Jan Kara4651c592010-11-25 03:56:24 +0100525 /* Find the freshly allocated block */
526 while (udf_next_aext(dir, &epos, &eloc, &elen, 1) ==
527 (EXT_RECORDED_ALLOCATED >> 30))
528 ;
529 block = eloc.logicalBlockNum + ((elen - 1) >>
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700530 dir->i_sb->s_blocksize_bits);
Jan Kara3bf25cb2007-05-08 00:35:16 -0700531 brelse(fibh->sbh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700532 fibh->sbh = fibh->ebh;
533 fi = (struct fileIdentDesc *)(fibh->sbh->b_data);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700534 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700535 fi = (struct fileIdentDesc *)
Marcin Slusarz4b111112008-02-08 04:20:36 -0800536 (fibh->sbh->b_data + sb->s_blocksize +
537 fibh->soffset);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700538 }
539 }
540
541 memset(cfi, 0, sizeof(struct fileIdentDesc));
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800542 if (UDF_SB(sb)->s_udfrev >= 0x0200)
Marcin Slusarz4b111112008-02-08 04:20:36 -0800543 udf_new_tag((char *)cfi, TAG_IDENT_FID, 3, 1, block,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200544 sizeof(struct tag));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700545 else
Marcin Slusarz4b111112008-02-08 04:20:36 -0800546 udf_new_tag((char *)cfi, TAG_IDENT_FID, 2, 1, block,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200547 sizeof(struct tag));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700548 cfi->fileVersionNum = cpu_to_le16(1);
549 cfi->lengthFileIdent = namelen;
550 cfi->lengthOfImpUse = cpu_to_le16(0);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700551 if (!udf_write_fi(dir, cfi, fi, fibh, NULL, name)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700552 dir->i_size += nfidlen;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800553 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
554 dinfo->i_lenAlloc += nfidlen;
Jan Kara2c948b32009-12-03 13:39:28 +0100555 else {
556 /* Find the last extent and truncate it to proper size */
557 while (udf_next_aext(dir, &epos, &eloc, &elen, 1) ==
558 (EXT_RECORDED_ALLOCATED >> 30))
559 ;
560 elen -= dinfo->i_lenExtents - dir->i_size;
561 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
562 epos.offset -= sizeof(struct short_ad);
563 else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
564 epos.offset -= sizeof(struct long_ad);
565 udf_write_aext(dir, &epos, &eloc, elen, 1);
566 dinfo->i_lenExtents = dir->i_size;
567 }
568
Linus Torvalds1da177e2005-04-16 15:20:36 -0700569 mark_inode_dirty(dir);
Jan Karab80697c2008-03-04 14:14:05 +0100570 goto out_ok;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700571 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700572 *err = -EIO;
Jan Karab80697c2008-03-04 14:14:05 +0100573 goto out_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700574 }
Jan Karab80697c2008-03-04 14:14:05 +0100575
576out_err:
577 fi = NULL;
578 if (fibh->sbh != fibh->ebh)
579 brelse(fibh->ebh);
580 brelse(fibh->sbh);
581out_ok:
582 brelse(epos.bh);
583 kfree(name);
584 return fi;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700585}
586
587static int udf_delete_entry(struct inode *inode, struct fileIdentDesc *fi,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700588 struct udf_fileident_bh *fibh,
589 struct fileIdentDesc *cfi)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700590{
591 cfi->fileCharacteristics |= FID_FILE_CHAR_DELETED;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700592
Linus Torvalds1da177e2005-04-16 15:20:36 -0700593 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT))
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200594 memset(&(cfi->icb), 0x00, sizeof(struct long_ad));
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700595
Linus Torvalds1da177e2005-04-16 15:20:36 -0700596 return udf_write_fi(inode, cfi, fi, fibh, NULL, NULL);
597}
598
Al Virod2be51c2014-09-04 09:34:14 -0400599static int udf_add_nondir(struct dentry *dentry, struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700600{
Al Virod2be51c2014-09-04 09:34:14 -0400601 struct udf_inode_info *iinfo = UDF_I(inode);
David Howells2b0143b2015-03-17 22:25:59 +0000602 struct inode *dir = d_inode(dentry->d_parent);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700603 struct udf_fileident_bh fibh;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700604 struct fileIdentDesc cfi, *fi;
605 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700606
Marcin Slusarz4b111112008-02-08 04:20:36 -0800607 fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
Al Virod2be51c2014-09-04 09:34:14 -0400608 if (unlikely(!fi)) {
Miklos Szeredi6d6b77f2011-10-28 14:13:28 +0200609 inode_dec_link_count(inode);
Al Virob2315092014-09-04 09:38:11 -0400610 unlock_new_inode(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700611 iput(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700612 return err;
613 }
614 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800615 cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700616 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800617 cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700618 udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
Jan Kara3adc12e2015-03-24 16:47:25 -0400619 dir->i_ctime = dir->i_mtime = current_fs_time(dir->i_sb);
620 mark_inode_dirty(dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700621 if (fibh.sbh != fibh.ebh)
Jan Kara3bf25cb2007-05-08 00:35:16 -0700622 brelse(fibh.ebh);
623 brelse(fibh.sbh);
Al Virob2315092014-09-04 09:38:11 -0400624 unlock_new_inode(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700625 d_instantiate(dentry, inode);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700626
Linus Torvalds1da177e2005-04-16 15:20:36 -0700627 return 0;
628}
629
Al Virod2be51c2014-09-04 09:34:14 -0400630static int udf_create(struct inode *dir, struct dentry *dentry, umode_t mode,
631 bool excl)
632{
Al Viro0b93a922014-09-04 09:47:41 -0400633 struct inode *inode = udf_new_inode(dir, mode);
Al Virod2be51c2014-09-04 09:34:14 -0400634
Al Viro0b93a922014-09-04 09:47:41 -0400635 if (IS_ERR(inode))
636 return PTR_ERR(inode);
Al Virod2be51c2014-09-04 09:34:14 -0400637
638 if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
639 inode->i_data.a_ops = &udf_adinicb_aops;
640 else
641 inode->i_data.a_ops = &udf_aops;
642 inode->i_op = &udf_file_inode_operations;
643 inode->i_fop = &udf_file_operations;
644 mark_inode_dirty(inode);
645
646 return udf_add_nondir(dentry, inode);
647}
648
Al Viro656d09d2013-06-12 09:35:33 +0400649static int udf_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode)
650{
Al Viro0b93a922014-09-04 09:47:41 -0400651 struct inode *inode = udf_new_inode(dir, mode);
Al Viro656d09d2013-06-12 09:35:33 +0400652
Al Viro0b93a922014-09-04 09:47:41 -0400653 if (IS_ERR(inode))
654 return PTR_ERR(inode);
Al Viro656d09d2013-06-12 09:35:33 +0400655
Al Viro0b93a922014-09-04 09:47:41 -0400656 if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
Al Viro656d09d2013-06-12 09:35:33 +0400657 inode->i_data.a_ops = &udf_adinicb_aops;
658 else
659 inode->i_data.a_ops = &udf_aops;
660 inode->i_op = &udf_file_inode_operations;
661 inode->i_fop = &udf_file_operations;
662 mark_inode_dirty(inode);
Al Viro656d09d2013-06-12 09:35:33 +0400663 d_tmpfile(dentry, inode);
Al Virob2315092014-09-04 09:38:11 -0400664 unlock_new_inode(inode);
Al Viro656d09d2013-06-12 09:35:33 +0400665 return 0;
666}
667
Al Viro1a67aaf2011-07-26 01:52:52 -0400668static int udf_mknod(struct inode *dir, struct dentry *dentry, umode_t mode,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700669 dev_t rdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700670{
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700671 struct inode *inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700672
673 if (!old_valid_dev(rdev))
674 return -EINVAL;
675
Al Viro0b93a922014-09-04 09:47:41 -0400676 inode = udf_new_inode(dir, mode);
677 if (IS_ERR(inode))
678 return PTR_ERR(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700679
Al Virod2be51c2014-09-04 09:34:14 -0400680 init_special_inode(inode, mode, rdev);
681 return udf_add_nondir(dentry, inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700682}
683
Al Viro18bb1db2011-07-26 01:41:39 -0400684static int udf_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700685{
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700686 struct inode *inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700687 struct udf_fileident_bh fibh;
688 struct fileIdentDesc cfi, *fi;
689 int err;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800690 struct udf_inode_info *dinfo = UDF_I(dir);
691 struct udf_inode_info *iinfo;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700692
Al Viro0b93a922014-09-04 09:47:41 -0400693 inode = udf_new_inode(dir, S_IFDIR | mode);
694 if (IS_ERR(inode))
695 return PTR_ERR(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700696
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800697 iinfo = UDF_I(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700698 inode->i_op = &udf_dir_inode_operations;
699 inode->i_fop = &udf_dir_operations;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800700 fi = udf_add_entry(inode, NULL, &fibh, &cfi, &err);
701 if (!fi) {
Miklos Szeredi6d6b77f2011-10-28 14:13:28 +0200702 inode_dec_link_count(inode);
Al Virob2315092014-09-04 09:38:11 -0400703 unlock_new_inode(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700704 iput(inode);
705 goto out;
706 }
Miklos Szeredibfe86842011-10-28 14:13:29 +0200707 set_nlink(inode, 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700708 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800709 cfi.icb.extLocation = cpu_to_lelb(dinfo->i_location);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700710 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800711 cpu_to_le32(dinfo->i_unique & 0x00000000FFFFFFFFUL);
Marcin Slusarz4b111112008-02-08 04:20:36 -0800712 cfi.fileCharacteristics =
713 FID_FILE_CHAR_DIRECTORY | FID_FILE_CHAR_PARENT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700714 udf_write_fi(inode, &cfi, fi, &fibh, NULL, NULL);
Jan Kara3bf25cb2007-05-08 00:35:16 -0700715 brelse(fibh.sbh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700716 mark_inode_dirty(inode);
717
Marcin Slusarz4b111112008-02-08 04:20:36 -0800718 fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
719 if (!fi) {
Miklos Szeredi6d6b77f2011-10-28 14:13:28 +0200720 clear_nlink(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700721 mark_inode_dirty(inode);
Al Virob2315092014-09-04 09:38:11 -0400722 unlock_new_inode(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700723 iput(inode);
724 goto out;
725 }
726 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800727 cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700728 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800729 cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700730 cfi.fileCharacteristics |= FID_FILE_CHAR_DIRECTORY;
731 udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
Dave Hansend8c76e62006-09-30 23:29:04 -0700732 inc_nlink(dir);
Jan Kara3adc12e2015-03-24 16:47:25 -0400733 dir->i_ctime = dir->i_mtime = current_fs_time(dir->i_sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700734 mark_inode_dirty(dir);
Al Virob2315092014-09-04 09:38:11 -0400735 unlock_new_inode(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700736 d_instantiate(dentry, inode);
737 if (fibh.sbh != fibh.ebh)
Jan Kara3bf25cb2007-05-08 00:35:16 -0700738 brelse(fibh.ebh);
739 brelse(fibh.sbh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700740 err = 0;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700741
742out:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700743 return err;
744}
745
746static int empty_dir(struct inode *dir)
747{
748 struct fileIdentDesc *fi, cfi;
749 struct udf_fileident_bh fibh;
750 loff_t f_pos;
Jan Karaaf793292008-02-08 04:20:50 -0800751 loff_t size = udf_ext0_offset(dir) + dir->i_size;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700752 int block;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200753 struct kernel_lb_addr eloc;
Jan Karaff116fc2007-05-08 00:35:14 -0700754 uint32_t elen;
Jan Kara60448b12007-05-08 00:35:13 -0700755 sector_t offset;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700756 struct extent_position epos = {};
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800757 struct udf_inode_info *dinfo = UDF_I(dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700758
Jan Karaaf793292008-02-08 04:20:50 -0800759 f_pos = udf_ext0_offset(dir);
760 fibh.soffset = fibh.eoffset = f_pos & (dir->i_sb->s_blocksize - 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700761
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800762 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700763 fibh.sbh = fibh.ebh = NULL;
Jan Karaaf793292008-02-08 04:20:50 -0800764 else if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits,
Marcin Slusarz4b111112008-02-08 04:20:36 -0800765 &epos, &eloc, &elen, &offset) ==
766 (EXT_RECORDED_ALLOCATED >> 30)) {
Pekka Enberg97e961f2008-10-15 12:29:03 +0200767 block = udf_get_lb_pblock(dir->i_sb, &eloc, offset);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700768 if ((++offset << dir->i_sb->s_blocksize_bits) < elen) {
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800769 if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200770 epos.offset -= sizeof(struct short_ad);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800771 else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200772 epos.offset -= sizeof(struct long_ad);
Marcin Slusarz4b111112008-02-08 04:20:36 -0800773 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700774 offset = 0;
775
Marcin Slusarz4b111112008-02-08 04:20:36 -0800776 fibh.sbh = fibh.ebh = udf_tread(dir->i_sb, block);
777 if (!fibh.sbh) {
Jan Kara3bf25cb2007-05-08 00:35:16 -0700778 brelse(epos.bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700779 return 0;
780 }
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700781 } else {
Jan Kara3bf25cb2007-05-08 00:35:16 -0700782 brelse(epos.bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700783 return 0;
784 }
785
Jan Karaaf793292008-02-08 04:20:50 -0800786 while (f_pos < size) {
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700787 fi = udf_fileident_read(dir, &f_pos, &fibh, &cfi, &epos, &eloc,
788 &elen, &offset);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700789 if (!fi) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700790 if (fibh.sbh != fibh.ebh)
Jan Kara3bf25cb2007-05-08 00:35:16 -0700791 brelse(fibh.ebh);
792 brelse(fibh.sbh);
793 brelse(epos.bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700794 return 0;
795 }
796
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700797 if (cfi.lengthFileIdent &&
798 (cfi.fileCharacteristics & FID_FILE_CHAR_DELETED) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700799 if (fibh.sbh != fibh.ebh)
Jan Kara3bf25cb2007-05-08 00:35:16 -0700800 brelse(fibh.ebh);
801 brelse(fibh.sbh);
802 brelse(epos.bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700803 return 0;
804 }
805 }
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700806
Linus Torvalds1da177e2005-04-16 15:20:36 -0700807 if (fibh.sbh != fibh.ebh)
Jan Kara3bf25cb2007-05-08 00:35:16 -0700808 brelse(fibh.ebh);
809 brelse(fibh.sbh);
810 brelse(epos.bh);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700811
Linus Torvalds1da177e2005-04-16 15:20:36 -0700812 return 1;
813}
814
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700815static int udf_rmdir(struct inode *dir, struct dentry *dentry)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700816{
817 int retval;
David Howells2b0143b2015-03-17 22:25:59 +0000818 struct inode *inode = d_inode(dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700819 struct udf_fileident_bh fibh;
820 struct fileIdentDesc *fi, cfi;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200821 struct kernel_lb_addr tloc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700822
823 retval = -ENOENT;
Al Viro9fbb76c2008-10-12 00:15:17 -0400824 fi = udf_find_entry(dir, &dentry->d_name, &fibh, &cfi);
Fabian Frederick231473f2015-04-08 21:23:58 +0200825 if (IS_ERR_OR_NULL(fi)) {
826 if (fi)
827 retval = PTR_ERR(fi);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700828 goto out;
Fabian Frederick231473f2015-04-08 21:23:58 +0200829 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700830
831 retval = -EIO;
832 tloc = lelb_to_cpu(cfi.icb.extLocation);
Pekka Enberg97e961f2008-10-15 12:29:03 +0200833 if (udf_get_lb_pblock(dir->i_sb, &tloc, 0) != inode->i_ino)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700834 goto end_rmdir;
835 retval = -ENOTEMPTY;
836 if (!empty_dir(inode))
837 goto end_rmdir;
838 retval = udf_delete_entry(dir, fi, &fibh, &cfi);
839 if (retval)
840 goto end_rmdir;
841 if (inode->i_nlink != 2)
Joe Perchesa40ecd72011-10-10 01:08:04 -0700842 udf_warn(inode->i_sb, "empty directory has nlink != 2 (%d)\n",
843 inode->i_nlink);
Dave Hansence71ec32006-09-30 23:29:06 -0700844 clear_nlink(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700845 inode->i_size = 0;
Stephen Mollettc007c062007-05-08 00:31:31 -0700846 inode_dec_link_count(dir);
Marcin Slusarz4b111112008-02-08 04:20:36 -0800847 inode->i_ctime = dir->i_ctime = dir->i_mtime =
848 current_fs_time(dir->i_sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700849 mark_inode_dirty(dir);
850
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700851end_rmdir:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700852 if (fibh.sbh != fibh.ebh)
Jan Kara3bf25cb2007-05-08 00:35:16 -0700853 brelse(fibh.ebh);
854 brelse(fibh.sbh);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700855
856out:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700857 return retval;
858}
859
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700860static int udf_unlink(struct inode *dir, struct dentry *dentry)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700861{
862 int retval;
David Howells2b0143b2015-03-17 22:25:59 +0000863 struct inode *inode = d_inode(dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700864 struct udf_fileident_bh fibh;
865 struct fileIdentDesc *fi;
866 struct fileIdentDesc cfi;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200867 struct kernel_lb_addr tloc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700868
869 retval = -ENOENT;
Al Viro9fbb76c2008-10-12 00:15:17 -0400870 fi = udf_find_entry(dir, &dentry->d_name, &fibh, &cfi);
Fabian Frederick231473f2015-04-08 21:23:58 +0200871
872 if (IS_ERR_OR_NULL(fi)) {
873 if (fi)
874 retval = PTR_ERR(fi);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700875 goto out;
Fabian Frederick231473f2015-04-08 21:23:58 +0200876 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700877
878 retval = -EIO;
879 tloc = lelb_to_cpu(cfi.icb.extLocation);
Pekka Enberg97e961f2008-10-15 12:29:03 +0200880 if (udf_get_lb_pblock(dir->i_sb, &tloc, 0) != inode->i_ino)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700881 goto end_unlink;
882
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700883 if (!inode->i_nlink) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700884 udf_debug("Deleting nonexistent file (%lu), %d\n",
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700885 inode->i_ino, inode->i_nlink);
Miklos Szeredibfe86842011-10-28 14:13:29 +0200886 set_nlink(inode, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700887 }
888 retval = udf_delete_entry(dir, fi, &fibh, &cfi);
889 if (retval)
890 goto end_unlink;
891 dir->i_ctime = dir->i_mtime = current_fs_time(dir->i_sb);
892 mark_inode_dirty(dir);
Dave Hansen9a53c3a2006-09-30 23:29:03 -0700893 inode_dec_link_count(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700894 inode->i_ctime = dir->i_ctime;
895 retval = 0;
896
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700897end_unlink:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700898 if (fibh.sbh != fibh.ebh)
Jan Kara3bf25cb2007-05-08 00:35:16 -0700899 brelse(fibh.ebh);
900 brelse(fibh.sbh);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700901
902out:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700903 return retval;
904}
905
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700906static int udf_symlink(struct inode *dir, struct dentry *dentry,
907 const char *symname)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700908{
Al Viro0b93a922014-09-04 09:47:41 -0400909 struct inode *inode = udf_new_inode(dir, S_IFLNK | S_IRWXUGO);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700910 struct pathComponent *pc;
Al Viro391e8bb2010-01-31 21:28:48 -0500911 const char *compstart;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700912 struct extent_position epos = {};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700913 int eoffset, elen = 0;
Al Viro391e8bb2010-01-31 21:28:48 -0500914 uint8_t *ea;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700915 int err;
916 int block;
Al Viro391e8bb2010-01-31 21:28:48 -0500917 unsigned char *name = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700918 int namelen;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800919 struct udf_inode_info *iinfo;
Jan Karad664b6a2010-10-20 18:28:46 +0200920 struct super_block *sb = dir->i_sb;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700921
Al Viro0b93a922014-09-04 09:47:41 -0400922 if (IS_ERR(inode))
923 return PTR_ERR(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700924
Alessio Igor Bogani4d0fb622010-11-16 18:40:47 +0100925 iinfo = UDF_I(inode);
926 down_write(&iinfo->i_data_sem);
Andrew Gabbasov9fba7052016-01-15 02:44:21 -0600927 name = kmalloc(UDF_NAME_LEN_CS0, GFP_NOFS);
Jan Karab80697c2008-03-04 14:14:05 +0100928 if (!name) {
929 err = -ENOMEM;
930 goto out_no_entry;
931 }
932
Linus Torvalds1da177e2005-04-16 15:20:36 -0700933 inode->i_data.a_ops = &udf_symlink_aops;
Al Viroc73119c2015-11-13 20:33:18 -0500934 inode->i_op = &page_symlink_inode_operations;
Al Viro21fc61c2015-11-17 01:07:57 -0500935 inode_nohighmem(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700936
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800937 if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200938 struct kernel_lb_addr eloc;
Harvey Harrison78e917d2008-04-28 02:16:19 -0700939 uint32_t bsize;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700940
Jan Karad664b6a2010-10-20 18:28:46 +0200941 block = udf_new_block(sb, inode,
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800942 iinfo->i_location.partitionReferenceNum,
943 iinfo->i_location.logicalBlockNum, &err);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700944 if (!block)
945 goto out_no_entry;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800946 epos.block = iinfo->i_location;
Jan Karaff116fc2007-05-08 00:35:14 -0700947 epos.offset = udf_file_entry_alloc_offset(inode);
948 epos.bh = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700949 eloc.logicalBlockNum = block;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800950 eloc.partitionReferenceNum =
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800951 iinfo->i_location.partitionReferenceNum;
Jan Karad664b6a2010-10-20 18:28:46 +0200952 bsize = sb->s_blocksize;
Harvey Harrison78e917d2008-04-28 02:16:19 -0700953 iinfo->i_lenExtents = bsize;
Pekka Enberg97e961f2008-10-15 12:29:03 +0200954 udf_add_aext(inode, &epos, &eloc, bsize, 0);
Jan Kara3bf25cb2007-05-08 00:35:16 -0700955 brelse(epos.bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700956
Jan Karad664b6a2010-10-20 18:28:46 +0200957 block = udf_get_pblock(sb, block,
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800958 iinfo->i_location.partitionReferenceNum,
Marcin Slusarz4b111112008-02-08 04:20:36 -0800959 0);
Jan Karad664b6a2010-10-20 18:28:46 +0200960 epos.bh = udf_tgetblk(sb, block);
Jan Karaff116fc2007-05-08 00:35:14 -0700961 lock_buffer(epos.bh);
Jan Karad664b6a2010-10-20 18:28:46 +0200962 memset(epos.bh->b_data, 0x00, bsize);
Jan Karaff116fc2007-05-08 00:35:14 -0700963 set_buffer_uptodate(epos.bh);
964 unlock_buffer(epos.bh);
965 mark_buffer_dirty_inode(epos.bh, inode);
966 ea = epos.bh->b_data + udf_ext0_offset(inode);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800967 } else
968 ea = iinfo->i_ext.i_data + iinfo->i_lenEAttr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700969
Jan Karad664b6a2010-10-20 18:28:46 +0200970 eoffset = sb->s_blocksize - udf_ext0_offset(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700971 pc = (struct pathComponent *)ea;
972
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700973 if (*symname == '/') {
974 do {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700975 symname++;
976 } while (*symname == '/');
977
978 pc->componentType = 1;
979 pc->lengthComponentIdent = 0;
980 pc->componentFileVersionNum = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700981 elen += sizeof(struct pathComponent);
982 }
983
984 err = -ENAMETOOLONG;
985
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700986 while (*symname) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700987 if (elen + sizeof(struct pathComponent) > eoffset)
988 goto out_no_entry;
989
990 pc = (struct pathComponent *)(ea + elen);
991
Al Viro391e8bb2010-01-31 21:28:48 -0500992 compstart = symname;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700993
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700994 do {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700995 symname++;
996 } while (*symname && *symname != '/');
997
998 pc->componentType = 5;
999 pc->lengthComponentIdent = 0;
1000 pc->componentFileVersionNum = 0;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001001 if (compstart[0] == '.') {
1002 if ((symname - compstart) == 1)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001003 pc->componentType = 4;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001004 else if ((symname - compstart) == 2 &&
1005 compstart[1] == '.')
Linus Torvalds1da177e2005-04-16 15:20:36 -07001006 pc->componentType = 3;
1007 }
1008
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001009 if (pc->componentType == 5) {
Andrew Gabbasov525e2c52016-01-15 02:44:19 -06001010 namelen = udf_put_filename(sb, compstart,
1011 symname - compstart,
Andrew Gabbasov9fba7052016-01-15 02:44:21 -06001012 name, UDF_NAME_LEN_CS0);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001013 if (!namelen)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001014 goto out_no_entry;
1015
Marcin Slusarz4b111112008-02-08 04:20:36 -08001016 if (elen + sizeof(struct pathComponent) + namelen >
1017 eoffset)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001018 goto out_no_entry;
1019 else
1020 pc->lengthComponentIdent = namelen;
1021
1022 memcpy(pc->componentIdent, name, namelen);
1023 }
1024
1025 elen += sizeof(struct pathComponent) + pc->lengthComponentIdent;
1026
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001027 if (*symname) {
1028 do {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001029 symname++;
1030 } while (*symname == '/');
1031 }
1032 }
1033
Jan Kara3bf25cb2007-05-08 00:35:16 -07001034 brelse(epos.bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001035 inode->i_size = elen;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001036 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
1037 iinfo->i_lenAlloc = inode->i_size;
Jan Kara2c948b32009-12-03 13:39:28 +01001038 else
1039 udf_truncate_tail_extent(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001040 mark_inode_dirty(inode);
Jan Kara4ea77722013-12-23 22:02:16 +01001041 up_write(&iinfo->i_data_sem);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001042
Al Virod2be51c2014-09-04 09:34:14 -04001043 err = udf_add_nondir(dentry, inode);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001044out:
Jan Karab80697c2008-03-04 14:14:05 +01001045 kfree(name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001046 return err;
1047
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001048out_no_entry:
Alessio Igor Bogani4d0fb622010-11-16 18:40:47 +01001049 up_write(&iinfo->i_data_sem);
Dave Hansen9a53c3a2006-09-30 23:29:03 -07001050 inode_dec_link_count(inode);
Al Virob2315092014-09-04 09:38:11 -04001051 unlock_new_inode(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001052 iput(inode);
1053 goto out;
1054}
1055
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001056static int udf_link(struct dentry *old_dentry, struct inode *dir,
1057 struct dentry *dentry)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001058{
David Howells2b0143b2015-03-17 22:25:59 +00001059 struct inode *inode = d_inode(old_dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001060 struct udf_fileident_bh fibh;
1061 struct fileIdentDesc cfi, *fi;
1062 int err;
1063
Marcin Slusarz4b111112008-02-08 04:20:36 -08001064 fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
1065 if (!fi) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001066 return err;
1067 }
1068 cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
Marcin Slusarzc0b34432008-02-08 04:20:42 -08001069 cfi.icb.extLocation = cpu_to_lelb(UDF_I(inode)->i_location);
Jan Karad664b6a2010-10-20 18:28:46 +02001070 if (UDF_SB(inode->i_sb)->s_lvid_bh) {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001071 *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
Jan Karad664b6a2010-10-20 18:28:46 +02001072 cpu_to_le32(lvid_get_unique_id(inode->i_sb));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001073 }
1074 udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
Marcin Slusarzc0b34432008-02-08 04:20:42 -08001075 if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001076 mark_inode_dirty(dir);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001077
Linus Torvalds1da177e2005-04-16 15:20:36 -07001078 if (fibh.sbh != fibh.ebh)
Jan Kara3bf25cb2007-05-08 00:35:16 -07001079 brelse(fibh.ebh);
1080 brelse(fibh.sbh);
Dave Hansend8c76e62006-09-30 23:29:04 -07001081 inc_nlink(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001082 inode->i_ctime = current_fs_time(inode->i_sb);
1083 mark_inode_dirty(inode);
Jan Kara3adc12e2015-03-24 16:47:25 -04001084 dir->i_ctime = dir->i_mtime = current_fs_time(dir->i_sb);
1085 mark_inode_dirty(dir);
Al Viro7de9c6ee2010-10-23 11:11:40 -04001086 ihold(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001087 d_instantiate(dentry, inode);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001088
Linus Torvalds1da177e2005-04-16 15:20:36 -07001089 return 0;
1090}
1091
1092/* Anybody can rename anything with this: the permission checks are left to the
1093 * higher-level routines.
1094 */
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001095static int udf_rename(struct inode *old_dir, struct dentry *old_dentry,
1096 struct inode *new_dir, struct dentry *new_dentry)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001097{
David Howells2b0143b2015-03-17 22:25:59 +00001098 struct inode *old_inode = d_inode(old_dentry);
1099 struct inode *new_inode = d_inode(new_dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001100 struct udf_fileident_bh ofibh, nfibh;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001101 struct fileIdentDesc *ofi = NULL, *nfi = NULL, *dir_fi = NULL;
1102 struct fileIdentDesc ocfi, ncfi;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001103 struct buffer_head *dir_bh = NULL;
1104 int retval = -ENOENT;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001105 struct kernel_lb_addr tloc;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001106 struct udf_inode_info *old_iinfo = UDF_I(old_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001107
Al Viro9fbb76c2008-10-12 00:15:17 -04001108 ofi = udf_find_entry(old_dir, &old_dentry->d_name, &ofibh, &ocfi);
Fabian Frederick231473f2015-04-08 21:23:58 +02001109 if (IS_ERR(ofi)) {
1110 retval = PTR_ERR(ofi);
1111 goto end_rename;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001112 }
Fabian Frederick231473f2015-04-08 21:23:58 +02001113
1114 if (ofibh.sbh != ofibh.ebh)
1115 brelse(ofibh.ebh);
1116
1117 brelse(ofibh.sbh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001118 tloc = lelb_to_cpu(ocfi.icb.extLocation);
Pekka Enberg97e961f2008-10-15 12:29:03 +02001119 if (!ofi || udf_get_lb_pblock(old_dir->i_sb, &tloc, 0)
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001120 != old_inode->i_ino)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001121 goto end_rename;
1122
Al Viro9fbb76c2008-10-12 00:15:17 -04001123 nfi = udf_find_entry(new_dir, &new_dentry->d_name, &nfibh, &ncfi);
Fabian Frederick231473f2015-04-08 21:23:58 +02001124 if (IS_ERR(nfi)) {
1125 retval = PTR_ERR(nfi);
1126 goto end_rename;
1127 }
1128 if (nfi && !new_inode) {
1129 if (nfibh.sbh != nfibh.ebh)
1130 brelse(nfibh.ebh);
1131 brelse(nfibh.sbh);
1132 nfi = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001133 }
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001134 if (S_ISDIR(old_inode->i_mode)) {
Marcin Slusarz7f3fbd02008-02-08 04:20:49 -08001135 int offset = udf_ext0_offset(old_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001136
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001137 if (new_inode) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001138 retval = -ENOTEMPTY;
1139 if (!empty_dir(new_inode))
1140 goto end_rename;
1141 }
1142 retval = -EIO;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001143 if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001144 dir_fi = udf_get_fileident(
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001145 old_iinfo->i_ext.i_data -
1146 (old_iinfo->i_efe ?
Marcin Slusarz4b111112008-02-08 04:20:36 -08001147 sizeof(struct extendedFileEntry) :
1148 sizeof(struct fileEntry)),
1149 old_inode->i_sb->s_blocksize, &offset);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001150 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001151 dir_bh = udf_bread(old_inode, 0, 0, &retval);
1152 if (!dir_bh)
1153 goto end_rename;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001154 dir_fi = udf_get_fileident(dir_bh->b_data,
1155 old_inode->i_sb->s_blocksize, &offset);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001156 }
1157 if (!dir_fi)
1158 goto end_rename;
1159 tloc = lelb_to_cpu(dir_fi->icb.extLocation);
Pekka Enberg97e961f2008-10-15 12:29:03 +02001160 if (udf_get_lb_pblock(old_inode->i_sb, &tloc, 0) !=
Marcin Slusarz4b111112008-02-08 04:20:36 -08001161 old_dir->i_ino)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001162 goto end_rename;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001163 }
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001164 if (!nfi) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001165 nfi = udf_add_entry(new_dir, new_dentry, &nfibh, &ncfi,
1166 &retval);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001167 if (!nfi)
1168 goto end_rename;
1169 }
1170
1171 /*
1172 * Like most other Unix systems, set the ctime for inodes on a
1173 * rename.
1174 */
1175 old_inode->i_ctime = current_fs_time(old_inode->i_sb);
1176 mark_inode_dirty(old_inode);
1177
1178 /*
1179 * ok, that's it
1180 */
1181 ncfi.fileVersionNum = ocfi.fileVersionNum;
1182 ncfi.fileCharacteristics = ocfi.fileCharacteristics;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001183 memcpy(&(ncfi.icb), &(ocfi.icb), sizeof(struct long_ad));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001184 udf_write_fi(new_dir, &ncfi, nfi, &nfibh, NULL, NULL);
1185
1186 /* The old fid may have moved - find it again */
Al Viro9fbb76c2008-10-12 00:15:17 -04001187 ofi = udf_find_entry(old_dir, &old_dentry->d_name, &ofibh, &ocfi);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001188 udf_delete_entry(old_dir, ofi, &ofibh, &ocfi);
1189
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001190 if (new_inode) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001191 new_inode->i_ctime = current_fs_time(new_inode->i_sb);
Dave Hansen9a53c3a2006-09-30 23:29:03 -07001192 inode_dec_link_count(new_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001193 }
1194 old_dir->i_ctime = old_dir->i_mtime = current_fs_time(old_dir->i_sb);
Jan Kara3adc12e2015-03-24 16:47:25 -04001195 new_dir->i_ctime = new_dir->i_mtime = current_fs_time(new_dir->i_sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001196 mark_inode_dirty(old_dir);
Jan Kara3adc12e2015-03-24 16:47:25 -04001197 mark_inode_dirty(new_dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001198
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001199 if (dir_fi) {
Marcin Slusarzc0b34432008-02-08 04:20:42 -08001200 dir_fi->icb.extLocation = cpu_to_lelb(UDF_I(new_dir)->i_location);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001201 udf_update_tag((char *)dir_fi,
1202 (sizeof(struct fileIdentDesc) +
1203 le16_to_cpu(dir_fi->lengthOfImpUse) + 3) & ~3);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -08001204 if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001205 mark_inode_dirty(old_inode);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001206 else
Linus Torvalds1da177e2005-04-16 15:20:36 -07001207 mark_buffer_dirty_inode(dir_bh, old_inode);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001208
Dave Hansen9a53c3a2006-09-30 23:29:03 -07001209 inode_dec_link_count(old_dir);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001210 if (new_inode)
Dave Hansen9a53c3a2006-09-30 23:29:03 -07001211 inode_dec_link_count(new_inode);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001212 else {
Dave Hansend8c76e62006-09-30 23:29:04 -07001213 inc_nlink(new_dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001214 mark_inode_dirty(new_dir);
1215 }
1216 }
1217
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001218 if (ofi) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001219 if (ofibh.sbh != ofibh.ebh)
Jan Kara3bf25cb2007-05-08 00:35:16 -07001220 brelse(ofibh.ebh);
1221 brelse(ofibh.sbh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001222 }
1223
1224 retval = 0;
1225
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001226end_rename:
Jan Kara3bf25cb2007-05-08 00:35:16 -07001227 brelse(dir_bh);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001228 if (nfi) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001229 if (nfibh.sbh != nfibh.ebh)
Jan Kara3bf25cb2007-05-08 00:35:16 -07001230 brelse(nfibh.ebh);
1231 brelse(nfibh.sbh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001232 }
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001233
Linus Torvalds1da177e2005-04-16 15:20:36 -07001234 return retval;
1235}
1236
Rasmus Rohde221e5832008-04-30 17:22:06 +02001237static struct dentry *udf_get_parent(struct dentry *child)
1238{
Pekka Enberg97e961f2008-10-15 12:29:03 +02001239 struct kernel_lb_addr tloc;
Rasmus Rohde221e5832008-04-30 17:22:06 +02001240 struct inode *inode = NULL;
Linus Torvalds26fe5752012-05-10 13:14:12 -07001241 struct qstr dotdot = QSTR_INIT("..", 2);
Rasmus Rohde221e5832008-04-30 17:22:06 +02001242 struct fileIdentDesc cfi;
1243 struct udf_fileident_bh fibh;
1244
David Howells2b0143b2015-03-17 22:25:59 +00001245 if (!udf_find_entry(d_inode(child), &dotdot, &fibh, &cfi))
Jan Kara6d3d5e82014-09-04 16:15:51 +02001246 return ERR_PTR(-EACCES);
Rasmus Rohde221e5832008-04-30 17:22:06 +02001247
1248 if (fibh.sbh != fibh.ebh)
1249 brelse(fibh.ebh);
1250 brelse(fibh.sbh);
1251
Pekka Enberg97e961f2008-10-15 12:29:03 +02001252 tloc = lelb_to_cpu(cfi.icb.extLocation);
David Howells2b0143b2015-03-17 22:25:59 +00001253 inode = udf_iget(d_inode(child)->i_sb, &tloc);
Jan Kara6d3d5e82014-09-04 16:15:51 +02001254 if (IS_ERR(inode))
1255 return ERR_CAST(inode);
Rasmus Rohde221e5832008-04-30 17:22:06 +02001256
Christoph Hellwig44003722008-08-11 15:49:04 +02001257 return d_obtain_alias(inode);
Rasmus Rohde221e5832008-04-30 17:22:06 +02001258}
1259
1260
1261static struct dentry *udf_nfs_get_inode(struct super_block *sb, u32 block,
1262 u16 partref, __u32 generation)
1263{
1264 struct inode *inode;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001265 struct kernel_lb_addr loc;
Rasmus Rohde221e5832008-04-30 17:22:06 +02001266
1267 if (block == 0)
1268 return ERR_PTR(-ESTALE);
1269
1270 loc.logicalBlockNum = block;
1271 loc.partitionReferenceNum = partref;
Pekka Enberg97e961f2008-10-15 12:29:03 +02001272 inode = udf_iget(sb, &loc);
Rasmus Rohde221e5832008-04-30 17:22:06 +02001273
Jan Kara6d3d5e82014-09-04 16:15:51 +02001274 if (IS_ERR(inode))
1275 return ERR_CAST(inode);
Rasmus Rohde221e5832008-04-30 17:22:06 +02001276
1277 if (generation && inode->i_generation != generation) {
1278 iput(inode);
1279 return ERR_PTR(-ESTALE);
1280 }
Christoph Hellwig44003722008-08-11 15:49:04 +02001281 return d_obtain_alias(inode);
Rasmus Rohde221e5832008-04-30 17:22:06 +02001282}
1283
1284static struct dentry *udf_fh_to_dentry(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 < 3 ||
Rasmus Rohde221e5832008-04-30 17:22:06 +02001288 (fh_type != FILEID_UDF_WITH_PARENT &&
1289 fh_type != FILEID_UDF_WITHOUT_PARENT))
1290 return NULL;
1291
1292 return udf_nfs_get_inode(sb, fid->udf.block, fid->udf.partref,
1293 fid->udf.generation);
1294}
1295
1296static struct dentry *udf_fh_to_parent(struct super_block *sb,
1297 struct fid *fid, int fh_len, int fh_type)
1298{
NeilBrown92acca42015-05-08 10:16:23 +10001299 if (fh_len < 5 || fh_type != FILEID_UDF_WITH_PARENT)
Rasmus Rohde221e5832008-04-30 17:22:06 +02001300 return NULL;
1301
1302 return udf_nfs_get_inode(sb, fid->udf.parent_block,
1303 fid->udf.parent_partref,
1304 fid->udf.parent_generation);
1305}
Al Virob0b03822012-04-02 14:34:06 -04001306static int udf_encode_fh(struct inode *inode, __u32 *fh, int *lenp,
1307 struct inode *parent)
Rasmus Rohde221e5832008-04-30 17:22:06 +02001308{
1309 int len = *lenp;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001310 struct kernel_lb_addr location = UDF_I(inode)->i_location;
Rasmus Rohde221e5832008-04-30 17:22:06 +02001311 struct fid *fid = (struct fid *)fh;
1312 int type = FILEID_UDF_WITHOUT_PARENT;
1313
Al Virob0b03822012-04-02 14:34:06 -04001314 if (parent && (len < 5)) {
Aneesh Kumar K.V5fe0c232011-01-29 18:43:25 +05301315 *lenp = 5;
Namjae Jeon94e07a752013-02-17 15:48:11 +09001316 return FILEID_INVALID;
Aneesh Kumar K.V5fe0c232011-01-29 18:43:25 +05301317 } else if (len < 3) {
1318 *lenp = 3;
Namjae Jeon94e07a752013-02-17 15:48:11 +09001319 return FILEID_INVALID;
Aneesh Kumar K.V5fe0c232011-01-29 18:43:25 +05301320 }
Rasmus Rohde221e5832008-04-30 17:22:06 +02001321
1322 *lenp = 3;
1323 fid->udf.block = location.logicalBlockNum;
1324 fid->udf.partref = location.partitionReferenceNum;
Mathias Krause0143fc52012-07-12 08:46:55 +02001325 fid->udf.parent_partref = 0;
Rasmus Rohde221e5832008-04-30 17:22:06 +02001326 fid->udf.generation = inode->i_generation;
1327
Al Virob0b03822012-04-02 14:34:06 -04001328 if (parent) {
1329 location = UDF_I(parent)->i_location;
Rasmus Rohde221e5832008-04-30 17:22:06 +02001330 fid->udf.parent_block = location.logicalBlockNum;
1331 fid->udf.parent_partref = location.partitionReferenceNum;
1332 fid->udf.parent_generation = inode->i_generation;
Rasmus Rohde221e5832008-04-30 17:22:06 +02001333 *lenp = 5;
1334 type = FILEID_UDF_WITH_PARENT;
1335 }
1336
1337 return type;
1338}
1339
1340const struct export_operations udf_export_ops = {
1341 .encode_fh = udf_encode_fh,
1342 .fh_to_dentry = udf_fh_to_dentry,
1343 .fh_to_parent = udf_fh_to_parent,
1344 .get_parent = udf_get_parent,
1345};
1346
Arjan van de Venc5ef1c42007-02-12 00:55:40 -08001347const struct inode_operations udf_dir_inode_operations = {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001348 .lookup = udf_lookup,
1349 .create = udf_create,
1350 .link = udf_link,
1351 .unlink = udf_unlink,
1352 .symlink = udf_symlink,
1353 .mkdir = udf_mkdir,
1354 .rmdir = udf_rmdir,
1355 .mknod = udf_mknod,
1356 .rename = udf_rename,
Al Viro656d09d2013-06-12 09:35:33 +04001357 .tmpfile = udf_tmpfile,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001358};