Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * namei.c |
| 3 | * |
| 4 | * PURPOSE |
| 5 | * Inode name handling routines for the OSTA-UDF(tm) filesystem. |
| 6 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | * COPYRIGHT |
| 8 | * This file is distributed under the terms of the GNU General Public |
| 9 | * License (GPL). Copies of the GPL can be obtained from: |
| 10 | * ftp://prep.ai.mit.edu/pub/gnu/GPL |
| 11 | * Each contributing author retains all rights to their own work. |
| 12 | * |
| 13 | * (C) 1998-2004 Ben Fennema |
| 14 | * (C) 1999-2000 Stelias Computing Inc |
| 15 | * |
| 16 | * HISTORY |
| 17 | * |
| 18 | * 12/12/98 blf Created. Split out the lookup code from dir.c |
| 19 | * 04/19/99 blf link, mknod, symlink support |
| 20 | */ |
| 21 | |
| 22 | #include "udfdecl.h" |
| 23 | |
| 24 | #include "udf_i.h" |
| 25 | #include "udf_sb.h" |
| 26 | #include <linux/string.h> |
| 27 | #include <linux/errno.h> |
| 28 | #include <linux/mm.h> |
| 29 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | #include <linux/buffer_head.h> |
Alexey Dobriyan | e8edc6e | 2007-05-21 01:22:52 +0400 | [diff] [blame] | 31 | #include <linux/sched.h> |
Bob Copeland | f845fce | 2008-04-17 09:47:48 +0200 | [diff] [blame] | 32 | #include <linux/crc-itu-t.h> |
Rasmus Rohde | 221e583 | 2008-04-30 17:22:06 +0200 | [diff] [blame] | 33 | #include <linux/exportfs.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | |
Al Viro | 810c1b2e | 2011-03-02 10:15:26 -0500 | [diff] [blame^] | 35 | enum { UDF_MAX_LINKS = 0xffff }; |
| 36 | |
Al Viro | 391e8bb | 2010-01-31 21:28:48 -0500 | [diff] [blame] | 37 | static inline int udf_match(int len1, const unsigned char *name1, int len2, |
| 38 | const unsigned char *name2) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | { |
| 40 | if (len1 != len2) |
| 41 | return 0; |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 42 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | return !memcmp(name1, name2, len1); |
| 44 | } |
| 45 | |
| 46 | int udf_write_fi(struct inode *inode, struct fileIdentDesc *cfi, |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 47 | struct fileIdentDesc *sfi, struct udf_fileident_bh *fibh, |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 48 | uint8_t *impuse, uint8_t *fileident) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | { |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 50 | uint16_t crclen = fibh->eoffset - fibh->soffset - sizeof(struct tag); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | uint16_t crc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | int offset; |
| 53 | uint16_t liu = le16_to_cpu(cfi->lengthOfImpUse); |
| 54 | uint8_t lfi = cfi->lengthFileIdent; |
| 55 | int padlen = fibh->eoffset - fibh->soffset - liu - lfi - |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 56 | sizeof(struct fileIdentDesc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | int adinicb = 0; |
| 58 | |
Marcin Slusarz | c0b3443 | 2008-02-08 04:20:42 -0800 | [diff] [blame] | 59 | if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | adinicb = 1; |
| 61 | |
| 62 | offset = fibh->soffset + sizeof(struct fileIdentDesc); |
| 63 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 64 | if (impuse) { |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 65 | if (adinicb || (offset + liu < 0)) { |
| 66 | memcpy((uint8_t *)sfi->impUse, impuse, liu); |
| 67 | } else if (offset >= 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | memcpy(fibh->ebh->b_data + offset, impuse, liu); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 69 | } else { |
| 70 | memcpy((uint8_t *)sfi->impUse, impuse, -offset); |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 71 | memcpy(fibh->ebh->b_data, impuse - offset, |
| 72 | liu + offset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | } |
| 74 | } |
| 75 | |
| 76 | offset += liu; |
| 77 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 78 | if (fileident) { |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 79 | if (adinicb || (offset + lfi < 0)) { |
| 80 | memcpy((uint8_t *)sfi->fileIdent + liu, fileident, lfi); |
| 81 | } else if (offset >= 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | memcpy(fibh->ebh->b_data + offset, fileident, lfi); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 83 | } else { |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 84 | memcpy((uint8_t *)sfi->fileIdent + liu, fileident, |
| 85 | -offset); |
| 86 | memcpy(fibh->ebh->b_data, fileident - offset, |
| 87 | lfi + offset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | } |
| 89 | } |
| 90 | |
| 91 | offset += lfi; |
| 92 | |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 93 | if (adinicb || (offset + padlen < 0)) { |
| 94 | memset((uint8_t *)sfi->padding + liu + lfi, 0x00, padlen); |
| 95 | } else if (offset >= 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | memset(fibh->ebh->b_data + offset, 0x00, padlen); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 97 | } else { |
| 98 | memset((uint8_t *)sfi->padding + liu + lfi, 0x00, -offset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 99 | memset(fibh->ebh->b_data, 0x00, padlen + offset); |
| 100 | } |
| 101 | |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 102 | crc = crc_itu_t(0, (uint8_t *)cfi + sizeof(struct tag), |
| 103 | sizeof(struct fileIdentDesc) - sizeof(struct tag)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 104 | |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 105 | if (fibh->sbh == fibh->ebh) { |
Bob Copeland | f845fce | 2008-04-17 09:47:48 +0200 | [diff] [blame] | 106 | crc = crc_itu_t(crc, (uint8_t *)sfi->impUse, |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 107 | crclen + sizeof(struct tag) - |
Bob Copeland | f845fce | 2008-04-17 09:47:48 +0200 | [diff] [blame] | 108 | sizeof(struct fileIdentDesc)); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 109 | } else if (sizeof(struct fileIdentDesc) >= -fibh->soffset) { |
Bob Copeland | f845fce | 2008-04-17 09:47:48 +0200 | [diff] [blame] | 110 | crc = crc_itu_t(crc, fibh->ebh->b_data + |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 111 | sizeof(struct fileIdentDesc) + |
| 112 | fibh->soffset, |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 113 | crclen + sizeof(struct tag) - |
Bob Copeland | f845fce | 2008-04-17 09:47:48 +0200 | [diff] [blame] | 114 | sizeof(struct fileIdentDesc)); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 115 | } else { |
Bob Copeland | f845fce | 2008-04-17 09:47:48 +0200 | [diff] [blame] | 116 | crc = crc_itu_t(crc, (uint8_t *)sfi->impUse, |
| 117 | -fibh->soffset - sizeof(struct fileIdentDesc)); |
| 118 | crc = crc_itu_t(crc, fibh->ebh->b_data, fibh->eoffset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 119 | } |
| 120 | |
| 121 | cfi->descTag.descCRC = cpu_to_le16(crc); |
| 122 | cfi->descTag.descCRCLength = cpu_to_le16(crclen); |
Marcin Slusarz | 3f2587b | 2008-02-08 04:20:39 -0800 | [diff] [blame] | 123 | cfi->descTag.tagChecksum = udf_tag_checksum(&cfi->descTag); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 125 | if (adinicb || (sizeof(struct fileIdentDesc) <= -fibh->soffset)) { |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 126 | memcpy((uint8_t *)sfi, (uint8_t *)cfi, |
| 127 | sizeof(struct fileIdentDesc)); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 128 | } else { |
| 129 | memcpy((uint8_t *)sfi, (uint8_t *)cfi, -fibh->soffset); |
| 130 | memcpy(fibh->ebh->b_data, (uint8_t *)cfi - fibh->soffset, |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 131 | sizeof(struct fileIdentDesc) + fibh->soffset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | } |
| 133 | |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 134 | if (adinicb) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 135 | mark_inode_dirty(inode); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 136 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 137 | if (fibh->sbh != fibh->ebh) |
| 138 | mark_buffer_dirty_inode(fibh->ebh, inode); |
| 139 | mark_buffer_dirty_inode(fibh->sbh, inode); |
| 140 | } |
| 141 | return 0; |
| 142 | } |
| 143 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 144 | static struct fileIdentDesc *udf_find_entry(struct inode *dir, |
Al Viro | 391e8bb | 2010-01-31 21:28:48 -0500 | [diff] [blame] | 145 | const struct qstr *child, |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 146 | struct udf_fileident_bh *fibh, |
| 147 | struct fileIdentDesc *cfi) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | { |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 149 | struct fileIdentDesc *fi = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 150 | loff_t f_pos; |
| 151 | int block, flen; |
Al Viro | 391e8bb | 2010-01-31 21:28:48 -0500 | [diff] [blame] | 152 | unsigned char *fname = NULL; |
| 153 | unsigned char *nameptr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 154 | uint8_t lfi; |
| 155 | uint16_t liu; |
KAMBAROV, ZAUR | ec471dc | 2005-06-28 20:45:10 -0700 | [diff] [blame] | 156 | loff_t size; |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 157 | struct kernel_lb_addr eloc; |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 158 | uint32_t elen; |
Jan Kara | 60448b1 | 2007-05-08 00:35:13 -0700 | [diff] [blame] | 159 | sector_t offset; |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 160 | struct extent_position epos = {}; |
Marcin Slusarz | 48d6d8ff | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 161 | struct udf_inode_info *dinfo = UDF_I(dir); |
Al Viro | 9fbb76c | 2008-10-12 00:15:17 -0400 | [diff] [blame] | 162 | int isdotdot = child->len == 2 && |
| 163 | child->name[0] == '.' && child->name[1] == '.'; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | |
Jan Kara | af79329 | 2008-02-08 04:20:50 -0800 | [diff] [blame] | 165 | size = udf_ext0_offset(dir) + dir->i_size; |
| 166 | f_pos = udf_ext0_offset(dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 167 | |
Jan Kara | b80697c | 2008-03-04 14:14:05 +0100 | [diff] [blame] | 168 | fibh->sbh = fibh->ebh = NULL; |
Jan Kara | af79329 | 2008-02-08 04:20:50 -0800 | [diff] [blame] | 169 | fibh->soffset = fibh->eoffset = f_pos & (dir->i_sb->s_blocksize - 1); |
Jan Kara | b80697c | 2008-03-04 14:14:05 +0100 | [diff] [blame] | 170 | if (dinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { |
| 171 | if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits, &epos, |
| 172 | &eloc, &elen, &offset) != (EXT_RECORDED_ALLOCATED >> 30)) |
| 173 | goto out_err; |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 174 | block = udf_get_lb_pblock(dir->i_sb, &eloc, offset); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 175 | if ((++offset << dir->i_sb->s_blocksize_bits) < elen) { |
Marcin Slusarz | 48d6d8ff | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 176 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 177 | epos.offset -= sizeof(struct short_ad); |
Marcin Slusarz | 48d6d8ff | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 178 | else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 179 | epos.offset -= sizeof(struct long_ad); |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 180 | } else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 181 | offset = 0; |
| 182 | |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 183 | fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block); |
Jan Kara | b80697c | 2008-03-04 14:14:05 +0100 | [diff] [blame] | 184 | if (!fibh->sbh) |
| 185 | goto out_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | } |
| 187 | |
Jan Kara | b80697c | 2008-03-04 14:14:05 +0100 | [diff] [blame] | 188 | fname = kmalloc(UDF_NAME_LEN, GFP_NOFS); |
| 189 | if (!fname) |
| 190 | goto out_err; |
| 191 | |
Jan Kara | af79329 | 2008-02-08 04:20:50 -0800 | [diff] [blame] | 192 | while (f_pos < size) { |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 193 | fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc, |
| 194 | &elen, &offset); |
Jan Kara | b80697c | 2008-03-04 14:14:05 +0100 | [diff] [blame] | 195 | if (!fi) |
| 196 | goto out_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 197 | |
| 198 | liu = le16_to_cpu(cfi->lengthOfImpUse); |
| 199 | lfi = cfi->lengthFileIdent; |
| 200 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 201 | if (fibh->sbh == fibh->ebh) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 202 | nameptr = fi->fileIdent + liu; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 203 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 204 | int poffset; /* Unpaded ending offset */ |
| 205 | |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 206 | poffset = fibh->soffset + sizeof(struct fileIdentDesc) + |
| 207 | liu + lfi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 208 | |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 209 | if (poffset >= lfi) |
| 210 | nameptr = (uint8_t *)(fibh->ebh->b_data + |
| 211 | poffset - lfi); |
| 212 | else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 213 | nameptr = fname; |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 214 | memcpy(nameptr, fi->fileIdent + liu, |
| 215 | lfi - poffset); |
| 216 | memcpy(nameptr + lfi - poffset, |
| 217 | fibh->ebh->b_data, poffset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 218 | } |
| 219 | } |
| 220 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 221 | if ((cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) { |
| 222 | if (!UDF_QUERY_FLAG(dir->i_sb, UDF_FLAG_UNDELETE)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 223 | continue; |
| 224 | } |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 225 | |
| 226 | if ((cfi->fileCharacteristics & FID_FILE_CHAR_HIDDEN) != 0) { |
| 227 | if (!UDF_QUERY_FLAG(dir->i_sb, UDF_FLAG_UNHIDE)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 228 | continue; |
| 229 | } |
| 230 | |
Rasmus Rohde | 221e583 | 2008-04-30 17:22:06 +0200 | [diff] [blame] | 231 | if ((cfi->fileCharacteristics & FID_FILE_CHAR_PARENT) && |
Jesper Juhl | a4264b3 | 2010-12-12 23:18:15 +0100 | [diff] [blame] | 232 | isdotdot) |
| 233 | goto out_ok; |
Rasmus Rohde | 221e583 | 2008-04-30 17:22:06 +0200 | [diff] [blame] | 234 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 235 | if (!lfi) |
| 236 | continue; |
| 237 | |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 238 | flen = udf_get_filename(dir->i_sb, nameptr, fname, lfi); |
Al Viro | 9fbb76c | 2008-10-12 00:15:17 -0400 | [diff] [blame] | 239 | if (flen && udf_match(flen, fname, child->len, child->name)) |
Jan Kara | b80697c | 2008-03-04 14:14:05 +0100 | [diff] [blame] | 240 | goto out_ok; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | } |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 242 | |
Jan Kara | b80697c | 2008-03-04 14:14:05 +0100 | [diff] [blame] | 243 | out_err: |
| 244 | fi = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | if (fibh->sbh != fibh->ebh) |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 246 | brelse(fibh->ebh); |
| 247 | brelse(fibh->sbh); |
Jan Kara | b80697c | 2008-03-04 14:14:05 +0100 | [diff] [blame] | 248 | out_ok: |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 249 | brelse(epos.bh); |
Jan Kara | b80697c | 2008-03-04 14:14:05 +0100 | [diff] [blame] | 250 | kfree(fname); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 251 | |
Jan Kara | b80697c | 2008-03-04 14:14:05 +0100 | [diff] [blame] | 252 | return fi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | } |
| 254 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 255 | static struct dentry *udf_lookup(struct inode *dir, struct dentry *dentry, |
| 256 | struct nameidata *nd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 257 | { |
| 258 | struct inode *inode = NULL; |
Jayachandran C | db9a369 | 2006-02-03 03:04:50 -0800 | [diff] [blame] | 259 | struct fileIdentDesc cfi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 260 | struct udf_fileident_bh fibh; |
| 261 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 262 | if (dentry->d_name.len > UDF_NAME_LEN - 2) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 263 | return ERR_PTR(-ENAMETOOLONG); |
| 264 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 265 | #ifdef UDF_RECOVERY |
| 266 | /* temporary shorthand for specifying files by inode number */ |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 267 | if (!strncmp(dentry->d_name.name, ".B=", 3)) { |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 268 | struct kernel_lb_addr lb = { |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 269 | .logicalBlockNum = 0, |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 270 | .partitionReferenceNum = |
| 271 | simple_strtoul(dentry->d_name.name + 3, |
| 272 | NULL, 0), |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 273 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 274 | inode = udf_iget(dir->i_sb, lb); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 275 | if (!inode) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 276 | return ERR_PTR(-EACCES); |
| 277 | } |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 278 | } else |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 279 | #endif /* UDF_RECOVERY */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | |
Al Viro | 9fbb76c | 2008-10-12 00:15:17 -0400 | [diff] [blame] | 281 | if (udf_find_entry(dir, &dentry->d_name, &fibh, &cfi)) { |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 282 | struct kernel_lb_addr loc; |
| 283 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 284 | if (fibh.sbh != fibh.ebh) |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 285 | brelse(fibh.ebh); |
| 286 | brelse(fibh.sbh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 288 | loc = lelb_to_cpu(cfi.icb.extLocation); |
| 289 | inode = udf_iget(dir->i_sb, &loc); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 290 | if (!inode) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 291 | return ERR_PTR(-EACCES); |
| 292 | } |
| 293 | } |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 294 | |
Rasmus Rohde | 221e583 | 2008-04-30 17:22:06 +0200 | [diff] [blame] | 295 | return d_splice_alias(inode, dentry); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 296 | } |
| 297 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 298 | static struct fileIdentDesc *udf_add_entry(struct inode *dir, |
| 299 | struct dentry *dentry, |
| 300 | struct udf_fileident_bh *fibh, |
| 301 | struct fileIdentDesc *cfi, int *err) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 302 | { |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 303 | struct super_block *sb = dir->i_sb; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 304 | struct fileIdentDesc *fi = NULL; |
Al Viro | 391e8bb | 2010-01-31 21:28:48 -0500 | [diff] [blame] | 305 | unsigned char *name = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 306 | int namelen; |
| 307 | loff_t f_pos; |
Jan Kara | af79329 | 2008-02-08 04:20:50 -0800 | [diff] [blame] | 308 | loff_t size = udf_ext0_offset(dir) + dir->i_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 309 | int nfidlen; |
| 310 | uint8_t lfi; |
| 311 | uint16_t liu; |
| 312 | int block; |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 313 | struct kernel_lb_addr eloc; |
Jan Kara | 9afadc4 | 2008-05-06 18:26:17 +0200 | [diff] [blame] | 314 | uint32_t elen = 0; |
Jan Kara | 60448b1 | 2007-05-08 00:35:13 -0700 | [diff] [blame] | 315 | sector_t offset; |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 316 | struct extent_position epos = {}; |
Marcin Slusarz | 48d6d8ff | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 317 | struct udf_inode_info *dinfo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 318 | |
Jan Kara | b80697c | 2008-03-04 14:14:05 +0100 | [diff] [blame] | 319 | fibh->sbh = fibh->ebh = NULL; |
| 320 | name = kmalloc(UDF_NAME_LEN, GFP_NOFS); |
| 321 | if (!name) { |
| 322 | *err = -ENOMEM; |
| 323 | goto out_err; |
| 324 | } |
| 325 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 326 | if (dentry) { |
| 327 | if (!dentry->d_name.len) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 328 | *err = -EINVAL; |
Jan Kara | b80697c | 2008-03-04 14:14:05 +0100 | [diff] [blame] | 329 | goto out_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 330 | } |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 331 | namelen = udf_put_filename(sb, dentry->d_name.name, name, |
| 332 | dentry->d_name.len); |
| 333 | if (!namelen) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 334 | *err = -ENAMETOOLONG; |
Jan Kara | b80697c | 2008-03-04 14:14:05 +0100 | [diff] [blame] | 335 | goto out_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 336 | } |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 337 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 338 | namelen = 0; |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 339 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 340 | |
| 341 | nfidlen = (sizeof(struct fileIdentDesc) + namelen + 3) & ~3; |
| 342 | |
Jan Kara | af79329 | 2008-02-08 04:20:50 -0800 | [diff] [blame] | 343 | f_pos = udf_ext0_offset(dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 344 | |
Jan Kara | af79329 | 2008-02-08 04:20:50 -0800 | [diff] [blame] | 345 | fibh->soffset = fibh->eoffset = f_pos & (dir->i_sb->s_blocksize - 1); |
Marcin Slusarz | 48d6d8ff | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 346 | dinfo = UDF_I(dir); |
Jan Kara | b80697c | 2008-03-04 14:14:05 +0100 | [diff] [blame] | 347 | if (dinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { |
| 348 | if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits, &epos, |
| 349 | &eloc, &elen, &offset) != (EXT_RECORDED_ALLOCATED >> 30)) { |
| 350 | block = udf_get_lb_pblock(dir->i_sb, |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 351 | &dinfo->i_location, 0); |
Jan Kara | b80697c | 2008-03-04 14:14:05 +0100 | [diff] [blame] | 352 | fibh->soffset = fibh->eoffset = sb->s_blocksize; |
| 353 | goto add; |
| 354 | } |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 355 | block = udf_get_lb_pblock(dir->i_sb, &eloc, offset); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 356 | if ((++offset << dir->i_sb->s_blocksize_bits) < elen) { |
Marcin Slusarz | 48d6d8ff | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 357 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 358 | epos.offset -= sizeof(struct short_ad); |
Marcin Slusarz | 48d6d8ff | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 359 | else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 360 | epos.offset -= sizeof(struct long_ad); |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 361 | } else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 362 | offset = 0; |
| 363 | |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 364 | fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block); |
| 365 | if (!fibh->sbh) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 366 | *err = -EIO; |
Jan Kara | b80697c | 2008-03-04 14:14:05 +0100 | [diff] [blame] | 367 | goto out_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 368 | } |
| 369 | |
Marcin Slusarz | 48d6d8ff | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 370 | block = dinfo->i_location.logicalBlockNum; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | } |
| 372 | |
Jan Kara | af79329 | 2008-02-08 04:20:50 -0800 | [diff] [blame] | 373 | while (f_pos < size) { |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 374 | fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc, |
| 375 | &elen, &offset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 376 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 377 | if (!fi) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 378 | *err = -EIO; |
Jan Kara | b80697c | 2008-03-04 14:14:05 +0100 | [diff] [blame] | 379 | goto out_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 380 | } |
| 381 | |
| 382 | liu = le16_to_cpu(cfi->lengthOfImpUse); |
| 383 | lfi = cfi->lengthFileIdent; |
| 384 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 385 | if ((cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) { |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 386 | if (((sizeof(struct fileIdentDesc) + |
| 387 | liu + lfi + 3) & ~3) == nfidlen) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 388 | cfi->descTag.tagSerialNum = cpu_to_le16(1); |
| 389 | cfi->fileVersionNum = cpu_to_le16(1); |
| 390 | cfi->fileCharacteristics = 0; |
| 391 | cfi->lengthFileIdent = namelen; |
| 392 | cfi->lengthOfImpUse = cpu_to_le16(0); |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 393 | if (!udf_write_fi(dir, cfi, fi, fibh, NULL, |
| 394 | name)) |
Jan Kara | b80697c | 2008-03-04 14:14:05 +0100 | [diff] [blame] | 395 | goto out_ok; |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 396 | else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 397 | *err = -EIO; |
Jan Kara | b80697c | 2008-03-04 14:14:05 +0100 | [diff] [blame] | 398 | goto out_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 399 | } |
| 400 | } |
| 401 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 402 | } |
| 403 | |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 404 | add: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | f_pos += nfidlen; |
| 406 | |
Marcin Slusarz | 48d6d8ff | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 407 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB && |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 408 | sb->s_blocksize - fibh->eoffset < nfidlen) { |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 409 | brelse(epos.bh); |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 410 | epos.bh = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 411 | fibh->soffset -= udf_ext0_offset(dir); |
| 412 | fibh->eoffset -= udf_ext0_offset(dir); |
Jan Kara | af79329 | 2008-02-08 04:20:50 -0800 | [diff] [blame] | 413 | f_pos -= udf_ext0_offset(dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 414 | if (fibh->sbh != fibh->ebh) |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 415 | brelse(fibh->ebh); |
| 416 | brelse(fibh->sbh); |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 417 | fibh->sbh = fibh->ebh = |
| 418 | udf_expand_dir_adinicb(dir, &block, err); |
| 419 | if (!fibh->sbh) |
Jan Kara | b80697c | 2008-03-04 14:14:05 +0100 | [diff] [blame] | 420 | goto out_err; |
Marcin Slusarz | 48d6d8ff | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 421 | epos.block = dinfo->i_location; |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 422 | epos.offset = udf_file_entry_alloc_offset(dir); |
Jan Kara | 05343c4 | 2008-02-08 04:20:51 -0800 | [diff] [blame] | 423 | /* Load extent udf_expand_dir_adinicb() has created */ |
| 424 | udf_current_aext(dir, &epos, &eloc, &elen, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 425 | } |
| 426 | |
Jan Kara | 2c948b3 | 2009-12-03 13:39:28 +0100 | [diff] [blame] | 427 | /* Entry fits into current block? */ |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 428 | if (sb->s_blocksize - fibh->eoffset >= nfidlen) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 429 | fibh->soffset = fibh->eoffset; |
| 430 | fibh->eoffset += nfidlen; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 431 | if (fibh->sbh != fibh->ebh) { |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 432 | brelse(fibh->sbh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 433 | fibh->sbh = fibh->ebh; |
| 434 | } |
| 435 | |
Marcin Slusarz | 48d6d8ff | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 436 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { |
| 437 | block = dinfo->i_location.logicalBlockNum; |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 438 | fi = (struct fileIdentDesc *) |
Marcin Slusarz | 48d6d8ff | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 439 | (dinfo->i_ext.i_data + |
Marcin Slusarz | c0b3443 | 2008-02-08 04:20:42 -0800 | [diff] [blame] | 440 | fibh->soffset - |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 441 | udf_ext0_offset(dir) + |
Marcin Slusarz | 48d6d8ff | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 442 | dinfo->i_lenEAttr); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 443 | } else { |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 444 | block = eloc.logicalBlockNum + |
| 445 | ((elen - 1) >> |
| 446 | dir->i_sb->s_blocksize_bits); |
| 447 | fi = (struct fileIdentDesc *) |
| 448 | (fibh->sbh->b_data + fibh->soffset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 449 | } |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 450 | } else { |
Jan Kara | 2c948b3 | 2009-12-03 13:39:28 +0100 | [diff] [blame] | 451 | /* Round up last extent in the file */ |
| 452 | elen = (elen + sb->s_blocksize - 1) & ~(sb->s_blocksize - 1); |
| 453 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
| 454 | epos.offset -= sizeof(struct short_ad); |
| 455 | else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
| 456 | epos.offset -= sizeof(struct long_ad); |
| 457 | udf_write_aext(dir, &epos, &eloc, elen, 1); |
| 458 | dinfo->i_lenExtents = (dinfo->i_lenExtents + sb->s_blocksize |
| 459 | - 1) & ~(sb->s_blocksize - 1); |
| 460 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 461 | fibh->soffset = fibh->eoffset - sb->s_blocksize; |
| 462 | fibh->eoffset += nfidlen - sb->s_blocksize; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 463 | if (fibh->sbh != fibh->ebh) { |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 464 | brelse(fibh->sbh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 465 | fibh->sbh = fibh->ebh; |
| 466 | } |
| 467 | |
| 468 | block = eloc.logicalBlockNum + ((elen - 1) >> |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 469 | dir->i_sb->s_blocksize_bits); |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 470 | fibh->ebh = udf_bread(dir, |
Jan Kara | af79329 | 2008-02-08 04:20:50 -0800 | [diff] [blame] | 471 | f_pos >> dir->i_sb->s_blocksize_bits, 1, err); |
Jan Kara | b80697c | 2008-03-04 14:14:05 +0100 | [diff] [blame] | 472 | if (!fibh->ebh) |
| 473 | goto out_err; |
Jan Kara | 4651c59 | 2010-11-25 03:56:24 +0100 | [diff] [blame] | 474 | /* Extents could have been merged, invalidate our position */ |
| 475 | brelse(epos.bh); |
| 476 | epos.bh = NULL; |
| 477 | epos.block = dinfo->i_location; |
| 478 | epos.offset = udf_file_entry_alloc_offset(dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 479 | |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 480 | if (!fibh->soffset) { |
Jan Kara | 4651c59 | 2010-11-25 03:56:24 +0100 | [diff] [blame] | 481 | /* Find the freshly allocated block */ |
| 482 | while (udf_next_aext(dir, &epos, &eloc, &elen, 1) == |
| 483 | (EXT_RECORDED_ALLOCATED >> 30)) |
| 484 | ; |
| 485 | block = eloc.logicalBlockNum + ((elen - 1) >> |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 486 | dir->i_sb->s_blocksize_bits); |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 487 | brelse(fibh->sbh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 488 | fibh->sbh = fibh->ebh; |
| 489 | fi = (struct fileIdentDesc *)(fibh->sbh->b_data); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 490 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 491 | fi = (struct fileIdentDesc *) |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 492 | (fibh->sbh->b_data + sb->s_blocksize + |
| 493 | fibh->soffset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 494 | } |
| 495 | } |
| 496 | |
| 497 | memset(cfi, 0, sizeof(struct fileIdentDesc)); |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 498 | if (UDF_SB(sb)->s_udfrev >= 0x0200) |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 499 | udf_new_tag((char *)cfi, TAG_IDENT_FID, 3, 1, block, |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 500 | sizeof(struct tag)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 501 | else |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 502 | udf_new_tag((char *)cfi, TAG_IDENT_FID, 2, 1, block, |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 503 | sizeof(struct tag)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 504 | cfi->fileVersionNum = cpu_to_le16(1); |
| 505 | cfi->lengthFileIdent = namelen; |
| 506 | cfi->lengthOfImpUse = cpu_to_le16(0); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 507 | if (!udf_write_fi(dir, cfi, fi, fibh, NULL, name)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 508 | dir->i_size += nfidlen; |
Marcin Slusarz | 48d6d8ff | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 509 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
| 510 | dinfo->i_lenAlloc += nfidlen; |
Jan Kara | 2c948b3 | 2009-12-03 13:39:28 +0100 | [diff] [blame] | 511 | else { |
| 512 | /* Find the last extent and truncate it to proper size */ |
| 513 | while (udf_next_aext(dir, &epos, &eloc, &elen, 1) == |
| 514 | (EXT_RECORDED_ALLOCATED >> 30)) |
| 515 | ; |
| 516 | elen -= dinfo->i_lenExtents - dir->i_size; |
| 517 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
| 518 | epos.offset -= sizeof(struct short_ad); |
| 519 | else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
| 520 | epos.offset -= sizeof(struct long_ad); |
| 521 | udf_write_aext(dir, &epos, &eloc, elen, 1); |
| 522 | dinfo->i_lenExtents = dir->i_size; |
| 523 | } |
| 524 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 525 | mark_inode_dirty(dir); |
Jan Kara | b80697c | 2008-03-04 14:14:05 +0100 | [diff] [blame] | 526 | goto out_ok; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 527 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 528 | *err = -EIO; |
Jan Kara | b80697c | 2008-03-04 14:14:05 +0100 | [diff] [blame] | 529 | goto out_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 530 | } |
Jan Kara | b80697c | 2008-03-04 14:14:05 +0100 | [diff] [blame] | 531 | |
| 532 | out_err: |
| 533 | fi = NULL; |
| 534 | if (fibh->sbh != fibh->ebh) |
| 535 | brelse(fibh->ebh); |
| 536 | brelse(fibh->sbh); |
| 537 | out_ok: |
| 538 | brelse(epos.bh); |
| 539 | kfree(name); |
| 540 | return fi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 541 | } |
| 542 | |
| 543 | static int udf_delete_entry(struct inode *inode, struct fileIdentDesc *fi, |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 544 | struct udf_fileident_bh *fibh, |
| 545 | struct fileIdentDesc *cfi) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 546 | { |
| 547 | cfi->fileCharacteristics |= FID_FILE_CHAR_DELETED; |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 548 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 549 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT)) |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 550 | memset(&(cfi->icb), 0x00, sizeof(struct long_ad)); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 551 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 552 | return udf_write_fi(inode, cfi, fi, fibh, NULL, NULL); |
| 553 | } |
| 554 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 555 | static int udf_create(struct inode *dir, struct dentry *dentry, int mode, |
| 556 | struct nameidata *nd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 557 | { |
| 558 | struct udf_fileident_bh fibh; |
| 559 | struct inode *inode; |
| 560 | struct fileIdentDesc cfi, *fi; |
| 561 | int err; |
Marcin Slusarz | 48d6d8ff | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 562 | struct udf_inode_info *iinfo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 563 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 564 | inode = udf_new_inode(dir, mode, &err); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 565 | if (!inode) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 566 | return err; |
| 567 | } |
| 568 | |
Marcin Slusarz | 48d6d8ff | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 569 | iinfo = UDF_I(inode); |
| 570 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 571 | inode->i_data.a_ops = &udf_adinicb_aops; |
| 572 | else |
| 573 | inode->i_data.a_ops = &udf_aops; |
| 574 | inode->i_op = &udf_file_inode_operations; |
| 575 | inode->i_fop = &udf_file_operations; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 576 | mark_inode_dirty(inode); |
| 577 | |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 578 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
| 579 | if (!fi) { |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 580 | inode->i_nlink--; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 581 | mark_inode_dirty(inode); |
| 582 | iput(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 583 | return err; |
| 584 | } |
| 585 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); |
Marcin Slusarz | 48d6d8ff | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 586 | cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 587 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
Marcin Slusarz | 48d6d8ff | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 588 | cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 589 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); |
Marcin Slusarz | c0b3443 | 2008-02-08 04:20:42 -0800 | [diff] [blame] | 590 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 591 | mark_inode_dirty(dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 592 | if (fibh.sbh != fibh.ebh) |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 593 | brelse(fibh.ebh); |
| 594 | brelse(fibh.sbh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 595 | d_instantiate(dentry, inode); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 596 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 597 | return 0; |
| 598 | } |
| 599 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 600 | static int udf_mknod(struct inode *dir, struct dentry *dentry, int mode, |
| 601 | dev_t rdev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 602 | { |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 603 | struct inode *inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 604 | struct udf_fileident_bh fibh; |
| 605 | struct fileIdentDesc cfi, *fi; |
| 606 | int err; |
Marcin Slusarz | 48d6d8ff | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 607 | struct udf_inode_info *iinfo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 608 | |
| 609 | if (!old_valid_dev(rdev)) |
| 610 | return -EINVAL; |
| 611 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 612 | err = -EIO; |
| 613 | inode = udf_new_inode(dir, mode, &err); |
| 614 | if (!inode) |
| 615 | goto out; |
| 616 | |
Marcin Slusarz | 48d6d8ff | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 617 | iinfo = UDF_I(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 618 | init_special_inode(inode, mode, rdev); |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 619 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
| 620 | if (!fi) { |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 621 | inode->i_nlink--; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 622 | mark_inode_dirty(inode); |
| 623 | iput(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 624 | return err; |
| 625 | } |
| 626 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); |
Marcin Slusarz | 48d6d8ff | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 627 | cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 628 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
Marcin Slusarz | 48d6d8ff | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 629 | cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 630 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); |
Marcin Slusarz | c0b3443 | 2008-02-08 04:20:42 -0800 | [diff] [blame] | 631 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 632 | mark_inode_dirty(dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 633 | mark_inode_dirty(inode); |
| 634 | |
| 635 | if (fibh.sbh != fibh.ebh) |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 636 | brelse(fibh.ebh); |
| 637 | brelse(fibh.sbh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 638 | d_instantiate(dentry, inode); |
| 639 | err = 0; |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 640 | |
| 641 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 642 | return err; |
| 643 | } |
| 644 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 645 | static int udf_mkdir(struct inode *dir, struct dentry *dentry, int mode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 646 | { |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 647 | struct inode *inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 648 | struct udf_fileident_bh fibh; |
| 649 | struct fileIdentDesc cfi, *fi; |
| 650 | int err; |
Marcin Slusarz | 48d6d8ff | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 651 | struct udf_inode_info *dinfo = UDF_I(dir); |
| 652 | struct udf_inode_info *iinfo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 653 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 654 | err = -EMLINK; |
Al Viro | 810c1b2e | 2011-03-02 10:15:26 -0500 | [diff] [blame^] | 655 | if (dir->i_nlink >= UDF_MAX_LINKS) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 656 | goto out; |
| 657 | |
| 658 | err = -EIO; |
Dmitry Monakhov | a6c5a03 | 2010-03-04 17:32:22 +0300 | [diff] [blame] | 659 | inode = udf_new_inode(dir, S_IFDIR | mode, &err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 660 | if (!inode) |
| 661 | goto out; |
| 662 | |
Marcin Slusarz | 48d6d8ff | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 663 | iinfo = UDF_I(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 664 | inode->i_op = &udf_dir_inode_operations; |
| 665 | inode->i_fop = &udf_dir_operations; |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 666 | fi = udf_add_entry(inode, NULL, &fibh, &cfi, &err); |
| 667 | if (!fi) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 668 | inode->i_nlink--; |
| 669 | mark_inode_dirty(inode); |
| 670 | iput(inode); |
| 671 | goto out; |
| 672 | } |
| 673 | inode->i_nlink = 2; |
| 674 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); |
Marcin Slusarz | 48d6d8ff | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 675 | cfi.icb.extLocation = cpu_to_lelb(dinfo->i_location); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 676 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
Marcin Slusarz | 48d6d8ff | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 677 | cpu_to_le32(dinfo->i_unique & 0x00000000FFFFFFFFUL); |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 678 | cfi.fileCharacteristics = |
| 679 | FID_FILE_CHAR_DIRECTORY | FID_FILE_CHAR_PARENT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 680 | udf_write_fi(inode, &cfi, fi, &fibh, NULL, NULL); |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 681 | brelse(fibh.sbh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 682 | mark_inode_dirty(inode); |
| 683 | |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 684 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
| 685 | if (!fi) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 686 | inode->i_nlink = 0; |
| 687 | mark_inode_dirty(inode); |
| 688 | iput(inode); |
| 689 | goto out; |
| 690 | } |
| 691 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); |
Marcin Slusarz | 48d6d8ff | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 692 | cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 693 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
Marcin Slusarz | 48d6d8ff | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 694 | cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 695 | cfi.fileCharacteristics |= FID_FILE_CHAR_DIRECTORY; |
| 696 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); |
Dave Hansen | d8c76e6 | 2006-09-30 23:29:04 -0700 | [diff] [blame] | 697 | inc_nlink(dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 698 | mark_inode_dirty(dir); |
| 699 | d_instantiate(dentry, inode); |
| 700 | if (fibh.sbh != fibh.ebh) |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 701 | brelse(fibh.ebh); |
| 702 | brelse(fibh.sbh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 703 | err = 0; |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 704 | |
| 705 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 706 | return err; |
| 707 | } |
| 708 | |
| 709 | static int empty_dir(struct inode *dir) |
| 710 | { |
| 711 | struct fileIdentDesc *fi, cfi; |
| 712 | struct udf_fileident_bh fibh; |
| 713 | loff_t f_pos; |
Jan Kara | af79329 | 2008-02-08 04:20:50 -0800 | [diff] [blame] | 714 | loff_t size = udf_ext0_offset(dir) + dir->i_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 715 | int block; |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 716 | struct kernel_lb_addr eloc; |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 717 | uint32_t elen; |
Jan Kara | 60448b1 | 2007-05-08 00:35:13 -0700 | [diff] [blame] | 718 | sector_t offset; |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 719 | struct extent_position epos = {}; |
Marcin Slusarz | 48d6d8ff | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 720 | struct udf_inode_info *dinfo = UDF_I(dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 721 | |
Jan Kara | af79329 | 2008-02-08 04:20:50 -0800 | [diff] [blame] | 722 | f_pos = udf_ext0_offset(dir); |
| 723 | fibh.soffset = fibh.eoffset = f_pos & (dir->i_sb->s_blocksize - 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 724 | |
Marcin Slusarz | 48d6d8ff | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 725 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 726 | fibh.sbh = fibh.ebh = NULL; |
Jan Kara | af79329 | 2008-02-08 04:20:50 -0800 | [diff] [blame] | 727 | else if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits, |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 728 | &epos, &eloc, &elen, &offset) == |
| 729 | (EXT_RECORDED_ALLOCATED >> 30)) { |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 730 | block = udf_get_lb_pblock(dir->i_sb, &eloc, offset); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 731 | if ((++offset << dir->i_sb->s_blocksize_bits) < elen) { |
Marcin Slusarz | 48d6d8ff | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 732 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 733 | epos.offset -= sizeof(struct short_ad); |
Marcin Slusarz | 48d6d8ff | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 734 | else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 735 | epos.offset -= sizeof(struct long_ad); |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 736 | } else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 737 | offset = 0; |
| 738 | |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 739 | fibh.sbh = fibh.ebh = udf_tread(dir->i_sb, block); |
| 740 | if (!fibh.sbh) { |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 741 | brelse(epos.bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 742 | return 0; |
| 743 | } |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 744 | } else { |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 745 | brelse(epos.bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 746 | return 0; |
| 747 | } |
| 748 | |
Jan Kara | af79329 | 2008-02-08 04:20:50 -0800 | [diff] [blame] | 749 | while (f_pos < size) { |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 750 | fi = udf_fileident_read(dir, &f_pos, &fibh, &cfi, &epos, &eloc, |
| 751 | &elen, &offset); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 752 | if (!fi) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 753 | if (fibh.sbh != fibh.ebh) |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 754 | brelse(fibh.ebh); |
| 755 | brelse(fibh.sbh); |
| 756 | brelse(epos.bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 757 | return 0; |
| 758 | } |
| 759 | |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 760 | if (cfi.lengthFileIdent && |
| 761 | (cfi.fileCharacteristics & FID_FILE_CHAR_DELETED) == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 762 | if (fibh.sbh != fibh.ebh) |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 763 | brelse(fibh.ebh); |
| 764 | brelse(fibh.sbh); |
| 765 | brelse(epos.bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 766 | return 0; |
| 767 | } |
| 768 | } |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 769 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 770 | if (fibh.sbh != fibh.ebh) |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 771 | brelse(fibh.ebh); |
| 772 | brelse(fibh.sbh); |
| 773 | brelse(epos.bh); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 774 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 775 | return 1; |
| 776 | } |
| 777 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 778 | static int udf_rmdir(struct inode *dir, struct dentry *dentry) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 779 | { |
| 780 | int retval; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 781 | struct inode *inode = dentry->d_inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 782 | struct udf_fileident_bh fibh; |
| 783 | struct fileIdentDesc *fi, cfi; |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 784 | struct kernel_lb_addr tloc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 785 | |
| 786 | retval = -ENOENT; |
Al Viro | 9fbb76c | 2008-10-12 00:15:17 -0400 | [diff] [blame] | 787 | fi = udf_find_entry(dir, &dentry->d_name, &fibh, &cfi); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 788 | if (!fi) |
| 789 | goto out; |
| 790 | |
| 791 | retval = -EIO; |
| 792 | tloc = lelb_to_cpu(cfi.icb.extLocation); |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 793 | if (udf_get_lb_pblock(dir->i_sb, &tloc, 0) != inode->i_ino) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 794 | goto end_rmdir; |
| 795 | retval = -ENOTEMPTY; |
| 796 | if (!empty_dir(inode)) |
| 797 | goto end_rmdir; |
| 798 | retval = udf_delete_entry(dir, fi, &fibh, &cfi); |
| 799 | if (retval) |
| 800 | goto end_rmdir; |
| 801 | if (inode->i_nlink != 2) |
| 802 | udf_warning(inode->i_sb, "udf_rmdir", |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 803 | "empty directory has nlink != 2 (%d)", |
| 804 | inode->i_nlink); |
Dave Hansen | ce71ec3 | 2006-09-30 23:29:06 -0700 | [diff] [blame] | 805 | clear_nlink(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 806 | inode->i_size = 0; |
Stephen Mollett | c007c06 | 2007-05-08 00:31:31 -0700 | [diff] [blame] | 807 | inode_dec_link_count(dir); |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 808 | inode->i_ctime = dir->i_ctime = dir->i_mtime = |
| 809 | current_fs_time(dir->i_sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 810 | mark_inode_dirty(dir); |
| 811 | |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 812 | end_rmdir: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 813 | if (fibh.sbh != fibh.ebh) |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 814 | brelse(fibh.ebh); |
| 815 | brelse(fibh.sbh); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 816 | |
| 817 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 818 | return retval; |
| 819 | } |
| 820 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 821 | static int udf_unlink(struct inode *dir, struct dentry *dentry) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 822 | { |
| 823 | int retval; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 824 | struct inode *inode = dentry->d_inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 825 | struct udf_fileident_bh fibh; |
| 826 | struct fileIdentDesc *fi; |
| 827 | struct fileIdentDesc cfi; |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 828 | struct kernel_lb_addr tloc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 829 | |
| 830 | retval = -ENOENT; |
Al Viro | 9fbb76c | 2008-10-12 00:15:17 -0400 | [diff] [blame] | 831 | fi = udf_find_entry(dir, &dentry->d_name, &fibh, &cfi); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 832 | if (!fi) |
| 833 | goto out; |
| 834 | |
| 835 | retval = -EIO; |
| 836 | tloc = lelb_to_cpu(cfi.icb.extLocation); |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 837 | if (udf_get_lb_pblock(dir->i_sb, &tloc, 0) != inode->i_ino) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 838 | goto end_unlink; |
| 839 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 840 | if (!inode->i_nlink) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 841 | udf_debug("Deleting nonexistent file (%lu), %d\n", |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 842 | inode->i_ino, inode->i_nlink); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 843 | inode->i_nlink = 1; |
| 844 | } |
| 845 | retval = udf_delete_entry(dir, fi, &fibh, &cfi); |
| 846 | if (retval) |
| 847 | goto end_unlink; |
| 848 | dir->i_ctime = dir->i_mtime = current_fs_time(dir->i_sb); |
| 849 | mark_inode_dirty(dir); |
Dave Hansen | 9a53c3a | 2006-09-30 23:29:03 -0700 | [diff] [blame] | 850 | inode_dec_link_count(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 851 | inode->i_ctime = dir->i_ctime; |
| 852 | retval = 0; |
| 853 | |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 854 | end_unlink: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 855 | if (fibh.sbh != fibh.ebh) |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 856 | brelse(fibh.ebh); |
| 857 | brelse(fibh.sbh); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 858 | |
| 859 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 860 | return retval; |
| 861 | } |
| 862 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 863 | static int udf_symlink(struct inode *dir, struct dentry *dentry, |
| 864 | const char *symname) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 865 | { |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 866 | struct inode *inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 867 | struct pathComponent *pc; |
Al Viro | 391e8bb | 2010-01-31 21:28:48 -0500 | [diff] [blame] | 868 | const char *compstart; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 869 | struct udf_fileident_bh fibh; |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 870 | struct extent_position epos = {}; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 871 | int eoffset, elen = 0; |
| 872 | struct fileIdentDesc *fi; |
| 873 | struct fileIdentDesc cfi; |
Al Viro | 391e8bb | 2010-01-31 21:28:48 -0500 | [diff] [blame] | 874 | uint8_t *ea; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 875 | int err; |
| 876 | int block; |
Al Viro | 391e8bb | 2010-01-31 21:28:48 -0500 | [diff] [blame] | 877 | unsigned char *name = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 878 | int namelen; |
Marcin Slusarz | 48d6d8ff | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 879 | struct udf_inode_info *iinfo; |
Jan Kara | d664b6a | 2010-10-20 18:28:46 +0200 | [diff] [blame] | 880 | struct super_block *sb = dir->i_sb; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 881 | |
Dmitry Monakhov | a6c5a03 | 2010-03-04 17:32:22 +0300 | [diff] [blame] | 882 | inode = udf_new_inode(dir, S_IFLNK | S_IRWXUGO, &err); |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 883 | if (!inode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 884 | goto out; |
| 885 | |
Alessio Igor Bogani | 4d0fb62 | 2010-11-16 18:40:47 +0100 | [diff] [blame] | 886 | iinfo = UDF_I(inode); |
| 887 | down_write(&iinfo->i_data_sem); |
Jan Kara | b80697c | 2008-03-04 14:14:05 +0100 | [diff] [blame] | 888 | name = kmalloc(UDF_NAME_LEN, GFP_NOFS); |
| 889 | if (!name) { |
| 890 | err = -ENOMEM; |
| 891 | goto out_no_entry; |
| 892 | } |
| 893 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 894 | inode->i_data.a_ops = &udf_symlink_aops; |
Dmitry Monakhov | c15d0fc | 2010-03-29 11:05:21 +0400 | [diff] [blame] | 895 | inode->i_op = &udf_symlink_inode_operations; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 896 | |
Marcin Slusarz | 48d6d8ff | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 897 | if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 898 | struct kernel_lb_addr eloc; |
Harvey Harrison | 78e917d | 2008-04-28 02:16:19 -0700 | [diff] [blame] | 899 | uint32_t bsize; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 900 | |
Jan Kara | d664b6a | 2010-10-20 18:28:46 +0200 | [diff] [blame] | 901 | block = udf_new_block(sb, inode, |
Marcin Slusarz | 48d6d8ff | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 902 | iinfo->i_location.partitionReferenceNum, |
| 903 | iinfo->i_location.logicalBlockNum, &err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 904 | if (!block) |
| 905 | goto out_no_entry; |
Marcin Slusarz | 48d6d8ff | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 906 | epos.block = iinfo->i_location; |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 907 | epos.offset = udf_file_entry_alloc_offset(inode); |
| 908 | epos.bh = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 909 | eloc.logicalBlockNum = block; |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 910 | eloc.partitionReferenceNum = |
Marcin Slusarz | 48d6d8ff | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 911 | iinfo->i_location.partitionReferenceNum; |
Jan Kara | d664b6a | 2010-10-20 18:28:46 +0200 | [diff] [blame] | 912 | bsize = sb->s_blocksize; |
Harvey Harrison | 78e917d | 2008-04-28 02:16:19 -0700 | [diff] [blame] | 913 | iinfo->i_lenExtents = bsize; |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 914 | udf_add_aext(inode, &epos, &eloc, bsize, 0); |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 915 | brelse(epos.bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 916 | |
Jan Kara | d664b6a | 2010-10-20 18:28:46 +0200 | [diff] [blame] | 917 | block = udf_get_pblock(sb, block, |
Marcin Slusarz | 48d6d8ff | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 918 | iinfo->i_location.partitionReferenceNum, |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 919 | 0); |
Jan Kara | d664b6a | 2010-10-20 18:28:46 +0200 | [diff] [blame] | 920 | epos.bh = udf_tgetblk(sb, block); |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 921 | lock_buffer(epos.bh); |
Jan Kara | d664b6a | 2010-10-20 18:28:46 +0200 | [diff] [blame] | 922 | memset(epos.bh->b_data, 0x00, bsize); |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 923 | set_buffer_uptodate(epos.bh); |
| 924 | unlock_buffer(epos.bh); |
| 925 | mark_buffer_dirty_inode(epos.bh, inode); |
| 926 | ea = epos.bh->b_data + udf_ext0_offset(inode); |
Marcin Slusarz | 48d6d8ff | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 927 | } else |
| 928 | ea = iinfo->i_ext.i_data + iinfo->i_lenEAttr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 929 | |
Jan Kara | d664b6a | 2010-10-20 18:28:46 +0200 | [diff] [blame] | 930 | eoffset = sb->s_blocksize - udf_ext0_offset(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 931 | pc = (struct pathComponent *)ea; |
| 932 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 933 | if (*symname == '/') { |
| 934 | do { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 935 | symname++; |
| 936 | } while (*symname == '/'); |
| 937 | |
| 938 | pc->componentType = 1; |
| 939 | pc->lengthComponentIdent = 0; |
| 940 | pc->componentFileVersionNum = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 941 | elen += sizeof(struct pathComponent); |
| 942 | } |
| 943 | |
| 944 | err = -ENAMETOOLONG; |
| 945 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 946 | while (*symname) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 947 | if (elen + sizeof(struct pathComponent) > eoffset) |
| 948 | goto out_no_entry; |
| 949 | |
| 950 | pc = (struct pathComponent *)(ea + elen); |
| 951 | |
Al Viro | 391e8bb | 2010-01-31 21:28:48 -0500 | [diff] [blame] | 952 | compstart = symname; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 953 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 954 | do { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 955 | symname++; |
| 956 | } while (*symname && *symname != '/'); |
| 957 | |
| 958 | pc->componentType = 5; |
| 959 | pc->lengthComponentIdent = 0; |
| 960 | pc->componentFileVersionNum = 0; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 961 | if (compstart[0] == '.') { |
| 962 | if ((symname - compstart) == 1) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 963 | pc->componentType = 4; |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 964 | else if ((symname - compstart) == 2 && |
| 965 | compstart[1] == '.') |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 966 | pc->componentType = 3; |
| 967 | } |
| 968 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 969 | if (pc->componentType == 5) { |
Jan Kara | d664b6a | 2010-10-20 18:28:46 +0200 | [diff] [blame] | 970 | namelen = udf_put_filename(sb, compstart, name, |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 971 | symname - compstart); |
| 972 | if (!namelen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 973 | goto out_no_entry; |
| 974 | |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 975 | if (elen + sizeof(struct pathComponent) + namelen > |
| 976 | eoffset) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 977 | goto out_no_entry; |
| 978 | else |
| 979 | pc->lengthComponentIdent = namelen; |
| 980 | |
| 981 | memcpy(pc->componentIdent, name, namelen); |
| 982 | } |
| 983 | |
| 984 | elen += sizeof(struct pathComponent) + pc->lengthComponentIdent; |
| 985 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 986 | if (*symname) { |
| 987 | do { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 988 | symname++; |
| 989 | } while (*symname == '/'); |
| 990 | } |
| 991 | } |
| 992 | |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 993 | brelse(epos.bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 994 | inode->i_size = elen; |
Marcin Slusarz | 48d6d8ff | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 995 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
| 996 | iinfo->i_lenAlloc = inode->i_size; |
Jan Kara | 2c948b3 | 2009-12-03 13:39:28 +0100 | [diff] [blame] | 997 | else |
| 998 | udf_truncate_tail_extent(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 999 | mark_inode_dirty(inode); |
| 1000 | |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1001 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
| 1002 | if (!fi) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1003 | goto out_no_entry; |
Jan Kara | d664b6a | 2010-10-20 18:28:46 +0200 | [diff] [blame] | 1004 | cfi.icb.extLength = cpu_to_le32(sb->s_blocksize); |
Marcin Slusarz | 48d6d8ff | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 1005 | cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); |
Jan Kara | d664b6a | 2010-10-20 18:28:46 +0200 | [diff] [blame] | 1006 | if (UDF_SB(inode->i_sb)->s_lvid_bh) { |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1007 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
Jan Kara | d664b6a | 2010-10-20 18:28:46 +0200 | [diff] [blame] | 1008 | cpu_to_le32(lvid_get_unique_id(sb)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1009 | } |
| 1010 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); |
Marcin Slusarz | c0b3443 | 2008-02-08 04:20:42 -0800 | [diff] [blame] | 1011 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1012 | mark_inode_dirty(dir); |
Alessio Igor Bogani | 4d0fb62 | 2010-11-16 18:40:47 +0100 | [diff] [blame] | 1013 | up_write(&iinfo->i_data_sem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1014 | if (fibh.sbh != fibh.ebh) |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 1015 | brelse(fibh.ebh); |
| 1016 | brelse(fibh.sbh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1017 | d_instantiate(dentry, inode); |
| 1018 | err = 0; |
| 1019 | |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1020 | out: |
Jan Kara | b80697c | 2008-03-04 14:14:05 +0100 | [diff] [blame] | 1021 | kfree(name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1022 | return err; |
| 1023 | |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1024 | out_no_entry: |
Alessio Igor Bogani | 4d0fb62 | 2010-11-16 18:40:47 +0100 | [diff] [blame] | 1025 | up_write(&iinfo->i_data_sem); |
Dave Hansen | 9a53c3a | 2006-09-30 23:29:03 -0700 | [diff] [blame] | 1026 | inode_dec_link_count(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1027 | iput(inode); |
| 1028 | goto out; |
| 1029 | } |
| 1030 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1031 | static int udf_link(struct dentry *old_dentry, struct inode *dir, |
| 1032 | struct dentry *dentry) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1033 | { |
| 1034 | struct inode *inode = old_dentry->d_inode; |
| 1035 | struct udf_fileident_bh fibh; |
| 1036 | struct fileIdentDesc cfi, *fi; |
| 1037 | int err; |
| 1038 | |
Al Viro | 810c1b2e | 2011-03-02 10:15:26 -0500 | [diff] [blame^] | 1039 | if (inode->i_nlink >= UDF_MAX_LINKS) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1040 | return -EMLINK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1041 | |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1042 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
| 1043 | if (!fi) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1044 | return err; |
| 1045 | } |
| 1046 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); |
Marcin Slusarz | c0b3443 | 2008-02-08 04:20:42 -0800 | [diff] [blame] | 1047 | cfi.icb.extLocation = cpu_to_lelb(UDF_I(inode)->i_location); |
Jan Kara | d664b6a | 2010-10-20 18:28:46 +0200 | [diff] [blame] | 1048 | if (UDF_SB(inode->i_sb)->s_lvid_bh) { |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1049 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
Jan Kara | d664b6a | 2010-10-20 18:28:46 +0200 | [diff] [blame] | 1050 | cpu_to_le32(lvid_get_unique_id(inode->i_sb)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1051 | } |
| 1052 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); |
Marcin Slusarz | c0b3443 | 2008-02-08 04:20:42 -0800 | [diff] [blame] | 1053 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1054 | mark_inode_dirty(dir); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1055 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1056 | if (fibh.sbh != fibh.ebh) |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 1057 | brelse(fibh.ebh); |
| 1058 | brelse(fibh.sbh); |
Dave Hansen | d8c76e6 | 2006-09-30 23:29:04 -0700 | [diff] [blame] | 1059 | inc_nlink(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1060 | inode->i_ctime = current_fs_time(inode->i_sb); |
| 1061 | mark_inode_dirty(inode); |
Al Viro | 7de9c6ee | 2010-10-23 11:11:40 -0400 | [diff] [blame] | 1062 | ihold(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1063 | d_instantiate(dentry, inode); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1064 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1065 | return 0; |
| 1066 | } |
| 1067 | |
| 1068 | /* Anybody can rename anything with this: the permission checks are left to the |
| 1069 | * higher-level routines. |
| 1070 | */ |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1071 | static int udf_rename(struct inode *old_dir, struct dentry *old_dentry, |
| 1072 | struct inode *new_dir, struct dentry *new_dentry) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1073 | { |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1074 | struct inode *old_inode = old_dentry->d_inode; |
| 1075 | struct inode *new_inode = new_dentry->d_inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1076 | struct udf_fileident_bh ofibh, nfibh; |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1077 | struct fileIdentDesc *ofi = NULL, *nfi = NULL, *dir_fi = NULL; |
| 1078 | struct fileIdentDesc ocfi, ncfi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1079 | struct buffer_head *dir_bh = NULL; |
| 1080 | int retval = -ENOENT; |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 1081 | struct kernel_lb_addr tloc; |
Marcin Slusarz | 48d6d8ff | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 1082 | struct udf_inode_info *old_iinfo = UDF_I(old_inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1083 | |
Al Viro | 9fbb76c | 2008-10-12 00:15:17 -0400 | [diff] [blame] | 1084 | ofi = udf_find_entry(old_dir, &old_dentry->d_name, &ofibh, &ocfi); |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1085 | if (ofi) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1086 | if (ofibh.sbh != ofibh.ebh) |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 1087 | brelse(ofibh.ebh); |
| 1088 | brelse(ofibh.sbh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1089 | } |
| 1090 | tloc = lelb_to_cpu(ocfi.icb.extLocation); |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 1091 | if (!ofi || udf_get_lb_pblock(old_dir->i_sb, &tloc, 0) |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1092 | != old_inode->i_ino) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1093 | goto end_rename; |
| 1094 | |
Al Viro | 9fbb76c | 2008-10-12 00:15:17 -0400 | [diff] [blame] | 1095 | nfi = udf_find_entry(new_dir, &new_dentry->d_name, &nfibh, &ncfi); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1096 | if (nfi) { |
| 1097 | if (!new_inode) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1098 | if (nfibh.sbh != nfibh.ebh) |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 1099 | brelse(nfibh.ebh); |
| 1100 | brelse(nfibh.sbh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1101 | nfi = NULL; |
| 1102 | } |
| 1103 | } |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1104 | if (S_ISDIR(old_inode->i_mode)) { |
Marcin Slusarz | 7f3fbd0 | 2008-02-08 04:20:49 -0800 | [diff] [blame] | 1105 | int offset = udf_ext0_offset(old_inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1106 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1107 | if (new_inode) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1108 | retval = -ENOTEMPTY; |
| 1109 | if (!empty_dir(new_inode)) |
| 1110 | goto end_rename; |
| 1111 | } |
| 1112 | retval = -EIO; |
Marcin Slusarz | 48d6d8ff | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 1113 | if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1114 | dir_fi = udf_get_fileident( |
Marcin Slusarz | 48d6d8ff | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 1115 | old_iinfo->i_ext.i_data - |
| 1116 | (old_iinfo->i_efe ? |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1117 | sizeof(struct extendedFileEntry) : |
| 1118 | sizeof(struct fileEntry)), |
| 1119 | old_inode->i_sb->s_blocksize, &offset); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1120 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1121 | dir_bh = udf_bread(old_inode, 0, 0, &retval); |
| 1122 | if (!dir_bh) |
| 1123 | goto end_rename; |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1124 | dir_fi = udf_get_fileident(dir_bh->b_data, |
| 1125 | old_inode->i_sb->s_blocksize, &offset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1126 | } |
| 1127 | if (!dir_fi) |
| 1128 | goto end_rename; |
| 1129 | tloc = lelb_to_cpu(dir_fi->icb.extLocation); |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 1130 | if (udf_get_lb_pblock(old_inode->i_sb, &tloc, 0) != |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1131 | old_dir->i_ino) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1132 | goto end_rename; |
| 1133 | |
| 1134 | retval = -EMLINK; |
Al Viro | 810c1b2e | 2011-03-02 10:15:26 -0500 | [diff] [blame^] | 1135 | if (!new_inode && new_dir->i_nlink >= UDF_MAX_LINKS) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1136 | goto end_rename; |
| 1137 | } |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1138 | if (!nfi) { |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1139 | nfi = udf_add_entry(new_dir, new_dentry, &nfibh, &ncfi, |
| 1140 | &retval); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1141 | if (!nfi) |
| 1142 | goto end_rename; |
| 1143 | } |
| 1144 | |
| 1145 | /* |
| 1146 | * Like most other Unix systems, set the ctime for inodes on a |
| 1147 | * rename. |
| 1148 | */ |
| 1149 | old_inode->i_ctime = current_fs_time(old_inode->i_sb); |
| 1150 | mark_inode_dirty(old_inode); |
| 1151 | |
| 1152 | /* |
| 1153 | * ok, that's it |
| 1154 | */ |
| 1155 | ncfi.fileVersionNum = ocfi.fileVersionNum; |
| 1156 | ncfi.fileCharacteristics = ocfi.fileCharacteristics; |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 1157 | memcpy(&(ncfi.icb), &(ocfi.icb), sizeof(struct long_ad)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1158 | udf_write_fi(new_dir, &ncfi, nfi, &nfibh, NULL, NULL); |
| 1159 | |
| 1160 | /* The old fid may have moved - find it again */ |
Al Viro | 9fbb76c | 2008-10-12 00:15:17 -0400 | [diff] [blame] | 1161 | ofi = udf_find_entry(old_dir, &old_dentry->d_name, &ofibh, &ocfi); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1162 | udf_delete_entry(old_dir, ofi, &ofibh, &ocfi); |
| 1163 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1164 | if (new_inode) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1165 | new_inode->i_ctime = current_fs_time(new_inode->i_sb); |
Dave Hansen | 9a53c3a | 2006-09-30 23:29:03 -0700 | [diff] [blame] | 1166 | inode_dec_link_count(new_inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1167 | } |
| 1168 | old_dir->i_ctime = old_dir->i_mtime = current_fs_time(old_dir->i_sb); |
| 1169 | mark_inode_dirty(old_dir); |
| 1170 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1171 | if (dir_fi) { |
Marcin Slusarz | c0b3443 | 2008-02-08 04:20:42 -0800 | [diff] [blame] | 1172 | dir_fi->icb.extLocation = cpu_to_lelb(UDF_I(new_dir)->i_location); |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1173 | udf_update_tag((char *)dir_fi, |
| 1174 | (sizeof(struct fileIdentDesc) + |
| 1175 | le16_to_cpu(dir_fi->lengthOfImpUse) + 3) & ~3); |
Marcin Slusarz | 48d6d8ff | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 1176 | if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1177 | mark_inode_dirty(old_inode); |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1178 | else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1179 | mark_buffer_dirty_inode(dir_bh, old_inode); |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1180 | |
Dave Hansen | 9a53c3a | 2006-09-30 23:29:03 -0700 | [diff] [blame] | 1181 | inode_dec_link_count(old_dir); |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1182 | if (new_inode) |
Dave Hansen | 9a53c3a | 2006-09-30 23:29:03 -0700 | [diff] [blame] | 1183 | inode_dec_link_count(new_inode); |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1184 | else { |
Dave Hansen | d8c76e6 | 2006-09-30 23:29:04 -0700 | [diff] [blame] | 1185 | inc_nlink(new_dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1186 | mark_inode_dirty(new_dir); |
| 1187 | } |
| 1188 | } |
| 1189 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1190 | if (ofi) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1191 | if (ofibh.sbh != ofibh.ebh) |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 1192 | brelse(ofibh.ebh); |
| 1193 | brelse(ofibh.sbh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1194 | } |
| 1195 | |
| 1196 | retval = 0; |
| 1197 | |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1198 | end_rename: |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 1199 | brelse(dir_bh); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1200 | if (nfi) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1201 | if (nfibh.sbh != nfibh.ebh) |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 1202 | brelse(nfibh.ebh); |
| 1203 | brelse(nfibh.sbh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1204 | } |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1205 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1206 | return retval; |
| 1207 | } |
| 1208 | |
Rasmus Rohde | 221e583 | 2008-04-30 17:22:06 +0200 | [diff] [blame] | 1209 | static struct dentry *udf_get_parent(struct dentry *child) |
| 1210 | { |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 1211 | struct kernel_lb_addr tloc; |
Rasmus Rohde | 221e583 | 2008-04-30 17:22:06 +0200 | [diff] [blame] | 1212 | struct inode *inode = NULL; |
Al Viro | 9fbb76c | 2008-10-12 00:15:17 -0400 | [diff] [blame] | 1213 | struct qstr dotdot = {.name = "..", .len = 2}; |
Rasmus Rohde | 221e583 | 2008-04-30 17:22:06 +0200 | [diff] [blame] | 1214 | struct fileIdentDesc cfi; |
| 1215 | struct udf_fileident_bh fibh; |
| 1216 | |
Rasmus Rohde | 221e583 | 2008-04-30 17:22:06 +0200 | [diff] [blame] | 1217 | if (!udf_find_entry(child->d_inode, &dotdot, &fibh, &cfi)) |
| 1218 | goto out_unlock; |
| 1219 | |
| 1220 | if (fibh.sbh != fibh.ebh) |
| 1221 | brelse(fibh.ebh); |
| 1222 | brelse(fibh.sbh); |
| 1223 | |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 1224 | tloc = lelb_to_cpu(cfi.icb.extLocation); |
| 1225 | inode = udf_iget(child->d_inode->i_sb, &tloc); |
Rasmus Rohde | 221e583 | 2008-04-30 17:22:06 +0200 | [diff] [blame] | 1226 | if (!inode) |
| 1227 | goto out_unlock; |
Rasmus Rohde | 221e583 | 2008-04-30 17:22:06 +0200 | [diff] [blame] | 1228 | |
Christoph Hellwig | 4400372 | 2008-08-11 15:49:04 +0200 | [diff] [blame] | 1229 | return d_obtain_alias(inode); |
Rasmus Rohde | 221e583 | 2008-04-30 17:22:06 +0200 | [diff] [blame] | 1230 | out_unlock: |
Rasmus Rohde | 221e583 | 2008-04-30 17:22:06 +0200 | [diff] [blame] | 1231 | return ERR_PTR(-EACCES); |
| 1232 | } |
| 1233 | |
| 1234 | |
| 1235 | static struct dentry *udf_nfs_get_inode(struct super_block *sb, u32 block, |
| 1236 | u16 partref, __u32 generation) |
| 1237 | { |
| 1238 | struct inode *inode; |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 1239 | struct kernel_lb_addr loc; |
Rasmus Rohde | 221e583 | 2008-04-30 17:22:06 +0200 | [diff] [blame] | 1240 | |
| 1241 | if (block == 0) |
| 1242 | return ERR_PTR(-ESTALE); |
| 1243 | |
| 1244 | loc.logicalBlockNum = block; |
| 1245 | loc.partitionReferenceNum = partref; |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 1246 | inode = udf_iget(sb, &loc); |
Rasmus Rohde | 221e583 | 2008-04-30 17:22:06 +0200 | [diff] [blame] | 1247 | |
| 1248 | if (inode == NULL) |
| 1249 | return ERR_PTR(-ENOMEM); |
| 1250 | |
| 1251 | if (generation && inode->i_generation != generation) { |
| 1252 | iput(inode); |
| 1253 | return ERR_PTR(-ESTALE); |
| 1254 | } |
Christoph Hellwig | 4400372 | 2008-08-11 15:49:04 +0200 | [diff] [blame] | 1255 | return d_obtain_alias(inode); |
Rasmus Rohde | 221e583 | 2008-04-30 17:22:06 +0200 | [diff] [blame] | 1256 | } |
| 1257 | |
| 1258 | static struct dentry *udf_fh_to_dentry(struct super_block *sb, |
| 1259 | struct fid *fid, int fh_len, int fh_type) |
| 1260 | { |
| 1261 | if ((fh_len != 3 && fh_len != 5) || |
| 1262 | (fh_type != FILEID_UDF_WITH_PARENT && |
| 1263 | fh_type != FILEID_UDF_WITHOUT_PARENT)) |
| 1264 | return NULL; |
| 1265 | |
| 1266 | return udf_nfs_get_inode(sb, fid->udf.block, fid->udf.partref, |
| 1267 | fid->udf.generation); |
| 1268 | } |
| 1269 | |
| 1270 | static struct dentry *udf_fh_to_parent(struct super_block *sb, |
| 1271 | struct fid *fid, int fh_len, int fh_type) |
| 1272 | { |
| 1273 | if (fh_len != 5 || fh_type != FILEID_UDF_WITH_PARENT) |
| 1274 | return NULL; |
| 1275 | |
| 1276 | return udf_nfs_get_inode(sb, fid->udf.parent_block, |
| 1277 | fid->udf.parent_partref, |
| 1278 | fid->udf.parent_generation); |
| 1279 | } |
| 1280 | static int udf_encode_fh(struct dentry *de, __u32 *fh, int *lenp, |
| 1281 | int connectable) |
| 1282 | { |
| 1283 | int len = *lenp; |
| 1284 | struct inode *inode = de->d_inode; |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 1285 | struct kernel_lb_addr location = UDF_I(inode)->i_location; |
Rasmus Rohde | 221e583 | 2008-04-30 17:22:06 +0200 | [diff] [blame] | 1286 | struct fid *fid = (struct fid *)fh; |
| 1287 | int type = FILEID_UDF_WITHOUT_PARENT; |
| 1288 | |
| 1289 | if (len < 3 || (connectable && len < 5)) |
| 1290 | return 255; |
| 1291 | |
| 1292 | *lenp = 3; |
| 1293 | fid->udf.block = location.logicalBlockNum; |
| 1294 | fid->udf.partref = location.partitionReferenceNum; |
| 1295 | fid->udf.generation = inode->i_generation; |
| 1296 | |
| 1297 | if (connectable && !S_ISDIR(inode->i_mode)) { |
| 1298 | spin_lock(&de->d_lock); |
| 1299 | inode = de->d_parent->d_inode; |
| 1300 | location = UDF_I(inode)->i_location; |
| 1301 | fid->udf.parent_block = location.logicalBlockNum; |
| 1302 | fid->udf.parent_partref = location.partitionReferenceNum; |
| 1303 | fid->udf.parent_generation = inode->i_generation; |
| 1304 | spin_unlock(&de->d_lock); |
| 1305 | *lenp = 5; |
| 1306 | type = FILEID_UDF_WITH_PARENT; |
| 1307 | } |
| 1308 | |
| 1309 | return type; |
| 1310 | } |
| 1311 | |
| 1312 | const struct export_operations udf_export_ops = { |
| 1313 | .encode_fh = udf_encode_fh, |
| 1314 | .fh_to_dentry = udf_fh_to_dentry, |
| 1315 | .fh_to_parent = udf_fh_to_parent, |
| 1316 | .get_parent = udf_get_parent, |
| 1317 | }; |
| 1318 | |
Arjan van de Ven | c5ef1c4 | 2007-02-12 00:55:40 -0800 | [diff] [blame] | 1319 | const struct inode_operations udf_dir_inode_operations = { |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1320 | .lookup = udf_lookup, |
| 1321 | .create = udf_create, |
| 1322 | .link = udf_link, |
| 1323 | .unlink = udf_unlink, |
| 1324 | .symlink = udf_symlink, |
| 1325 | .mkdir = udf_mkdir, |
| 1326 | .rmdir = udf_rmdir, |
| 1327 | .mknod = udf_mknod, |
| 1328 | .rename = udf_rename, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1329 | }; |
Dmitry Monakhov | c15d0fc | 2010-03-29 11:05:21 +0400 | [diff] [blame] | 1330 | const struct inode_operations udf_symlink_inode_operations = { |
| 1331 | .readlink = generic_readlink, |
| 1332 | .follow_link = page_follow_link_light, |
| 1333 | .put_link = page_put_link, |
Dmitry Monakhov | c15d0fc | 2010-03-29 11:05:21 +0400 | [diff] [blame] | 1334 | }; |