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 | 391e8bb | 2010-01-31 21:28:48 -0500 | [diff] [blame] | 35 | static inline int udf_match(int len1, const unsigned char *name1, int len2, |
| 36 | const unsigned char *name2) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | { |
| 38 | if (len1 != len2) |
| 39 | return 0; |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 40 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | return !memcmp(name1, name2, len1); |
| 42 | } |
| 43 | |
| 44 | int udf_write_fi(struct inode *inode, struct fileIdentDesc *cfi, |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 45 | struct fileIdentDesc *sfi, struct udf_fileident_bh *fibh, |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 46 | uint8_t *impuse, uint8_t *fileident) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | { |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 48 | uint16_t crclen = fibh->eoffset - fibh->soffset - sizeof(struct tag); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | uint16_t crc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | int offset; |
| 51 | uint16_t liu = le16_to_cpu(cfi->lengthOfImpUse); |
| 52 | uint8_t lfi = cfi->lengthFileIdent; |
| 53 | int padlen = fibh->eoffset - fibh->soffset - liu - lfi - |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 54 | sizeof(struct fileIdentDesc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | int adinicb = 0; |
| 56 | |
Marcin Slusarz | c0b3443 | 2008-02-08 04:20:42 -0800 | [diff] [blame] | 57 | if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | adinicb = 1; |
| 59 | |
| 60 | offset = fibh->soffset + sizeof(struct fileIdentDesc); |
| 61 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 62 | if (impuse) { |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 63 | if (adinicb || (offset + liu < 0)) { |
| 64 | memcpy((uint8_t *)sfi->impUse, impuse, liu); |
| 65 | } else if (offset >= 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | memcpy(fibh->ebh->b_data + offset, impuse, liu); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 67 | } else { |
| 68 | memcpy((uint8_t *)sfi->impUse, impuse, -offset); |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 69 | memcpy(fibh->ebh->b_data, impuse - offset, |
| 70 | liu + offset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | } |
| 72 | } |
| 73 | |
| 74 | offset += liu; |
| 75 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 76 | if (fileident) { |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 77 | if (adinicb || (offset + lfi < 0)) { |
| 78 | memcpy((uint8_t *)sfi->fileIdent + liu, fileident, lfi); |
| 79 | } else if (offset >= 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | memcpy(fibh->ebh->b_data + offset, fileident, lfi); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 81 | } else { |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 82 | memcpy((uint8_t *)sfi->fileIdent + liu, fileident, |
| 83 | -offset); |
| 84 | memcpy(fibh->ebh->b_data, fileident - offset, |
| 85 | lfi + offset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | } |
| 87 | } |
| 88 | |
| 89 | offset += lfi; |
| 90 | |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 91 | if (adinicb || (offset + padlen < 0)) { |
| 92 | memset((uint8_t *)sfi->padding + liu + lfi, 0x00, padlen); |
| 93 | } else if (offset >= 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 94 | memset(fibh->ebh->b_data + offset, 0x00, padlen); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 95 | } else { |
| 96 | memset((uint8_t *)sfi->padding + liu + lfi, 0x00, -offset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | memset(fibh->ebh->b_data, 0x00, padlen + offset); |
| 98 | } |
| 99 | |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 100 | crc = crc_itu_t(0, (uint8_t *)cfi + sizeof(struct tag), |
| 101 | sizeof(struct fileIdentDesc) - sizeof(struct tag)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 103 | if (fibh->sbh == fibh->ebh) { |
Bob Copeland | f845fce | 2008-04-17 09:47:48 +0200 | [diff] [blame] | 104 | crc = crc_itu_t(crc, (uint8_t *)sfi->impUse, |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 105 | crclen + sizeof(struct tag) - |
Bob Copeland | f845fce | 2008-04-17 09:47:48 +0200 | [diff] [blame] | 106 | sizeof(struct fileIdentDesc)); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 107 | } else if (sizeof(struct fileIdentDesc) >= -fibh->soffset) { |
Bob Copeland | f845fce | 2008-04-17 09:47:48 +0200 | [diff] [blame] | 108 | crc = crc_itu_t(crc, fibh->ebh->b_data + |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 109 | sizeof(struct fileIdentDesc) + |
| 110 | fibh->soffset, |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 111 | crclen + sizeof(struct tag) - |
Bob Copeland | f845fce | 2008-04-17 09:47:48 +0200 | [diff] [blame] | 112 | sizeof(struct fileIdentDesc)); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 113 | } else { |
Bob Copeland | f845fce | 2008-04-17 09:47:48 +0200 | [diff] [blame] | 114 | crc = crc_itu_t(crc, (uint8_t *)sfi->impUse, |
| 115 | -fibh->soffset - sizeof(struct fileIdentDesc)); |
| 116 | crc = crc_itu_t(crc, fibh->ebh->b_data, fibh->eoffset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 117 | } |
| 118 | |
| 119 | cfi->descTag.descCRC = cpu_to_le16(crc); |
| 120 | cfi->descTag.descCRCLength = cpu_to_le16(crclen); |
Marcin Slusarz | 3f2587b | 2008-02-08 04:20:39 -0800 | [diff] [blame] | 121 | cfi->descTag.tagChecksum = udf_tag_checksum(&cfi->descTag); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 123 | if (adinicb || (sizeof(struct fileIdentDesc) <= -fibh->soffset)) { |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 124 | memcpy((uint8_t *)sfi, (uint8_t *)cfi, |
| 125 | sizeof(struct fileIdentDesc)); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 126 | } else { |
| 127 | memcpy((uint8_t *)sfi, (uint8_t *)cfi, -fibh->soffset); |
| 128 | memcpy(fibh->ebh->b_data, (uint8_t *)cfi - fibh->soffset, |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 129 | sizeof(struct fileIdentDesc) + fibh->soffset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 130 | } |
| 131 | |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 132 | if (adinicb) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 133 | mark_inode_dirty(inode); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 134 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 135 | if (fibh->sbh != fibh->ebh) |
| 136 | mark_buffer_dirty_inode(fibh->ebh, inode); |
| 137 | mark_buffer_dirty_inode(fibh->sbh, inode); |
| 138 | } |
| 139 | return 0; |
| 140 | } |
| 141 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 142 | static struct fileIdentDesc *udf_find_entry(struct inode *dir, |
Al Viro | 391e8bb | 2010-01-31 21:28:48 -0500 | [diff] [blame] | 143 | const struct qstr *child, |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 144 | struct udf_fileident_bh *fibh, |
| 145 | struct fileIdentDesc *cfi) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | { |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 147 | struct fileIdentDesc *fi = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | loff_t f_pos; |
| 149 | int block, flen; |
Al Viro | 391e8bb | 2010-01-31 21:28:48 -0500 | [diff] [blame] | 150 | unsigned char *fname = NULL; |
| 151 | unsigned char *nameptr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 152 | uint8_t lfi; |
| 153 | uint16_t liu; |
KAMBAROV, ZAUR | ec471dc | 2005-06-28 20:45:10 -0700 | [diff] [blame] | 154 | loff_t size; |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 155 | struct kernel_lb_addr eloc; |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 156 | uint32_t elen; |
Jan Kara | 60448b1 | 2007-05-08 00:35:13 -0700 | [diff] [blame] | 157 | sector_t offset; |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 158 | struct extent_position epos = {}; |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 159 | struct udf_inode_info *dinfo = UDF_I(dir); |
Al Viro | 9fbb76c | 2008-10-12 00:15:17 -0400 | [diff] [blame] | 160 | int isdotdot = child->len == 2 && |
| 161 | child->name[0] == '.' && child->name[1] == '.'; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 162 | |
Jan Kara | af79329 | 2008-02-08 04:20:50 -0800 | [diff] [blame] | 163 | size = udf_ext0_offset(dir) + dir->i_size; |
| 164 | f_pos = udf_ext0_offset(dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 165 | |
Jan Kara | b80697c | 2008-03-04 14:14:05 +0100 | [diff] [blame] | 166 | fibh->sbh = fibh->ebh = NULL; |
Jan Kara | af79329 | 2008-02-08 04:20:50 -0800 | [diff] [blame] | 167 | fibh->soffset = fibh->eoffset = f_pos & (dir->i_sb->s_blocksize - 1); |
Jan Kara | b80697c | 2008-03-04 14:14:05 +0100 | [diff] [blame] | 168 | if (dinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { |
| 169 | if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits, &epos, |
| 170 | &eloc, &elen, &offset) != (EXT_RECORDED_ALLOCATED >> 30)) |
| 171 | goto out_err; |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 172 | block = udf_get_lb_pblock(dir->i_sb, &eloc, offset); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 173 | if ((++offset << dir->i_sb->s_blocksize_bits) < elen) { |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 174 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 175 | epos.offset -= sizeof(struct short_ad); |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 176 | else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 177 | epos.offset -= sizeof(struct long_ad); |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 178 | } else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 179 | offset = 0; |
| 180 | |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 181 | fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block); |
Jan Kara | b80697c | 2008-03-04 14:14:05 +0100 | [diff] [blame] | 182 | if (!fibh->sbh) |
| 183 | goto out_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 184 | } |
| 185 | |
Jan Kara | b80697c | 2008-03-04 14:14:05 +0100 | [diff] [blame] | 186 | fname = kmalloc(UDF_NAME_LEN, GFP_NOFS); |
| 187 | if (!fname) |
| 188 | goto out_err; |
| 189 | |
Jan Kara | af79329 | 2008-02-08 04:20:50 -0800 | [diff] [blame] | 190 | while (f_pos < size) { |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 191 | fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc, |
| 192 | &elen, &offset); |
Jan Kara | b80697c | 2008-03-04 14:14:05 +0100 | [diff] [blame] | 193 | if (!fi) |
| 194 | goto out_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 195 | |
| 196 | liu = le16_to_cpu(cfi->lengthOfImpUse); |
| 197 | lfi = cfi->lengthFileIdent; |
| 198 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 199 | if (fibh->sbh == fibh->ebh) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 200 | nameptr = fi->fileIdent + liu; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 201 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 202 | int poffset; /* Unpaded ending offset */ |
| 203 | |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 204 | poffset = fibh->soffset + sizeof(struct fileIdentDesc) + |
| 205 | liu + lfi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 206 | |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 207 | if (poffset >= lfi) |
| 208 | nameptr = (uint8_t *)(fibh->ebh->b_data + |
| 209 | poffset - lfi); |
| 210 | else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 211 | nameptr = fname; |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 212 | memcpy(nameptr, fi->fileIdent + liu, |
| 213 | lfi - poffset); |
| 214 | memcpy(nameptr + lfi - poffset, |
| 215 | fibh->ebh->b_data, poffset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 216 | } |
| 217 | } |
| 218 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 219 | if ((cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) { |
| 220 | if (!UDF_QUERY_FLAG(dir->i_sb, UDF_FLAG_UNDELETE)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 221 | continue; |
| 222 | } |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 223 | |
| 224 | if ((cfi->fileCharacteristics & FID_FILE_CHAR_HIDDEN) != 0) { |
| 225 | if (!UDF_QUERY_FLAG(dir->i_sb, UDF_FLAG_UNHIDE)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 226 | continue; |
| 227 | } |
| 228 | |
Rasmus Rohde | 221e583 | 2008-04-30 17:22:06 +0200 | [diff] [blame] | 229 | if ((cfi->fileCharacteristics & FID_FILE_CHAR_PARENT) && |
Jesper Juhl | a4264b3 | 2010-12-12 23:18:15 +0100 | [diff] [blame] | 230 | isdotdot) |
| 231 | goto out_ok; |
Rasmus Rohde | 221e583 | 2008-04-30 17:22:06 +0200 | [diff] [blame] | 232 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 233 | if (!lfi) |
| 234 | continue; |
| 235 | |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 236 | flen = udf_get_filename(dir->i_sb, nameptr, fname, lfi); |
Al Viro | 9fbb76c | 2008-10-12 00:15:17 -0400 | [diff] [blame] | 237 | if (flen && udf_match(flen, fname, child->len, child->name)) |
Jan Kara | b80697c | 2008-03-04 14:14:05 +0100 | [diff] [blame] | 238 | goto out_ok; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 239 | } |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 240 | |
Jan Kara | b80697c | 2008-03-04 14:14:05 +0100 | [diff] [blame] | 241 | out_err: |
| 242 | fi = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | if (fibh->sbh != fibh->ebh) |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 244 | brelse(fibh->ebh); |
| 245 | brelse(fibh->sbh); |
Jan Kara | b80697c | 2008-03-04 14:14:05 +0100 | [diff] [blame] | 246 | out_ok: |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 247 | brelse(epos.bh); |
Jan Kara | b80697c | 2008-03-04 14:14:05 +0100 | [diff] [blame] | 248 | kfree(fname); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 249 | |
Jan Kara | b80697c | 2008-03-04 14:14:05 +0100 | [diff] [blame] | 250 | return fi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 251 | } |
| 252 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 253 | static struct dentry *udf_lookup(struct inode *dir, struct dentry *dentry, |
| 254 | struct nameidata *nd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 255 | { |
| 256 | struct inode *inode = NULL; |
Jayachandran C | db9a369 | 2006-02-03 03:04:50 -0800 | [diff] [blame] | 257 | struct fileIdentDesc cfi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 258 | struct udf_fileident_bh fibh; |
| 259 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 260 | if (dentry->d_name.len > UDF_NAME_LEN - 2) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 261 | return ERR_PTR(-ENAMETOOLONG); |
| 262 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 263 | #ifdef UDF_RECOVERY |
| 264 | /* temporary shorthand for specifying files by inode number */ |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 265 | if (!strncmp(dentry->d_name.name, ".B=", 3)) { |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 266 | struct kernel_lb_addr lb = { |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 267 | .logicalBlockNum = 0, |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 268 | .partitionReferenceNum = |
| 269 | simple_strtoul(dentry->d_name.name + 3, |
| 270 | NULL, 0), |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 271 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 272 | inode = udf_iget(dir->i_sb, lb); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 273 | if (!inode) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 274 | return ERR_PTR(-EACCES); |
| 275 | } |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 276 | } else |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 277 | #endif /* UDF_RECOVERY */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 278 | |
Al Viro | 9fbb76c | 2008-10-12 00:15:17 -0400 | [diff] [blame] | 279 | if (udf_find_entry(dir, &dentry->d_name, &fibh, &cfi)) { |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 280 | struct kernel_lb_addr loc; |
| 281 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 282 | if (fibh.sbh != fibh.ebh) |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 283 | brelse(fibh.ebh); |
| 284 | brelse(fibh.sbh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 285 | |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 286 | loc = lelb_to_cpu(cfi.icb.extLocation); |
| 287 | inode = udf_iget(dir->i_sb, &loc); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 288 | if (!inode) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 289 | return ERR_PTR(-EACCES); |
| 290 | } |
| 291 | } |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 292 | |
Rasmus Rohde | 221e583 | 2008-04-30 17:22:06 +0200 | [diff] [blame] | 293 | return d_splice_alias(inode, dentry); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 294 | } |
| 295 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 296 | static struct fileIdentDesc *udf_add_entry(struct inode *dir, |
| 297 | struct dentry *dentry, |
| 298 | struct udf_fileident_bh *fibh, |
| 299 | struct fileIdentDesc *cfi, int *err) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 300 | { |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 301 | struct super_block *sb = dir->i_sb; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 302 | struct fileIdentDesc *fi = NULL; |
Al Viro | 391e8bb | 2010-01-31 21:28:48 -0500 | [diff] [blame] | 303 | unsigned char *name = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 304 | int namelen; |
| 305 | loff_t f_pos; |
Jan Kara | af79329 | 2008-02-08 04:20:50 -0800 | [diff] [blame] | 306 | loff_t size = udf_ext0_offset(dir) + dir->i_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 307 | int nfidlen; |
| 308 | uint8_t lfi; |
| 309 | uint16_t liu; |
| 310 | int block; |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 311 | struct kernel_lb_addr eloc; |
Jan Kara | 9afadc4 | 2008-05-06 18:26:17 +0200 | [diff] [blame] | 312 | uint32_t elen = 0; |
Jan Kara | 60448b1 | 2007-05-08 00:35:13 -0700 | [diff] [blame] | 313 | sector_t offset; |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 314 | struct extent_position epos = {}; |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 315 | struct udf_inode_info *dinfo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 316 | |
Jan Kara | b80697c | 2008-03-04 14:14:05 +0100 | [diff] [blame] | 317 | fibh->sbh = fibh->ebh = NULL; |
| 318 | name = kmalloc(UDF_NAME_LEN, GFP_NOFS); |
| 319 | if (!name) { |
| 320 | *err = -ENOMEM; |
| 321 | goto out_err; |
| 322 | } |
| 323 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 324 | if (dentry) { |
| 325 | if (!dentry->d_name.len) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 326 | *err = -EINVAL; |
Jan Kara | b80697c | 2008-03-04 14:14:05 +0100 | [diff] [blame] | 327 | goto out_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 328 | } |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 329 | namelen = udf_put_filename(sb, dentry->d_name.name, name, |
| 330 | dentry->d_name.len); |
| 331 | if (!namelen) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 332 | *err = -ENAMETOOLONG; |
Jan Kara | b80697c | 2008-03-04 14:14:05 +0100 | [diff] [blame] | 333 | goto out_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 334 | } |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 335 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 336 | namelen = 0; |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 337 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 338 | |
| 339 | nfidlen = (sizeof(struct fileIdentDesc) + namelen + 3) & ~3; |
| 340 | |
Jan Kara | af79329 | 2008-02-08 04:20:50 -0800 | [diff] [blame] | 341 | f_pos = udf_ext0_offset(dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 342 | |
Jan Kara | af79329 | 2008-02-08 04:20:50 -0800 | [diff] [blame] | 343 | fibh->soffset = fibh->eoffset = f_pos & (dir->i_sb->s_blocksize - 1); |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 344 | dinfo = UDF_I(dir); |
Jan Kara | b80697c | 2008-03-04 14:14:05 +0100 | [diff] [blame] | 345 | if (dinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { |
| 346 | if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits, &epos, |
| 347 | &eloc, &elen, &offset) != (EXT_RECORDED_ALLOCATED >> 30)) { |
| 348 | block = udf_get_lb_pblock(dir->i_sb, |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 349 | &dinfo->i_location, 0); |
Jan Kara | b80697c | 2008-03-04 14:14:05 +0100 | [diff] [blame] | 350 | fibh->soffset = fibh->eoffset = sb->s_blocksize; |
| 351 | goto add; |
| 352 | } |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 353 | block = udf_get_lb_pblock(dir->i_sb, &eloc, offset); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 354 | if ((++offset << dir->i_sb->s_blocksize_bits) < elen) { |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 355 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 356 | epos.offset -= sizeof(struct short_ad); |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 357 | else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 358 | epos.offset -= sizeof(struct long_ad); |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 359 | } else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 360 | offset = 0; |
| 361 | |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 362 | fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block); |
| 363 | if (!fibh->sbh) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 364 | *err = -EIO; |
Jan Kara | b80697c | 2008-03-04 14:14:05 +0100 | [diff] [blame] | 365 | goto out_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 366 | } |
| 367 | |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 368 | block = dinfo->i_location.logicalBlockNum; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 369 | } |
| 370 | |
Jan Kara | af79329 | 2008-02-08 04:20:50 -0800 | [diff] [blame] | 371 | while (f_pos < size) { |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 372 | fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc, |
| 373 | &elen, &offset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 374 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 375 | if (!fi) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 376 | *err = -EIO; |
Jan Kara | b80697c | 2008-03-04 14:14:05 +0100 | [diff] [blame] | 377 | goto out_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 378 | } |
| 379 | |
| 380 | liu = le16_to_cpu(cfi->lengthOfImpUse); |
| 381 | lfi = cfi->lengthFileIdent; |
| 382 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 383 | if ((cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) { |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 384 | if (((sizeof(struct fileIdentDesc) + |
| 385 | liu + lfi + 3) & ~3) == nfidlen) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 386 | cfi->descTag.tagSerialNum = cpu_to_le16(1); |
| 387 | cfi->fileVersionNum = cpu_to_le16(1); |
| 388 | cfi->fileCharacteristics = 0; |
| 389 | cfi->lengthFileIdent = namelen; |
| 390 | cfi->lengthOfImpUse = cpu_to_le16(0); |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 391 | if (!udf_write_fi(dir, cfi, fi, fibh, NULL, |
| 392 | name)) |
Jan Kara | b80697c | 2008-03-04 14:14:05 +0100 | [diff] [blame] | 393 | goto out_ok; |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 394 | else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 395 | *err = -EIO; |
Jan Kara | b80697c | 2008-03-04 14:14:05 +0100 | [diff] [blame] | 396 | goto out_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 397 | } |
| 398 | } |
| 399 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 400 | } |
| 401 | |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 402 | add: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 403 | f_pos += nfidlen; |
| 404 | |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 405 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB && |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 406 | sb->s_blocksize - fibh->eoffset < nfidlen) { |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 407 | brelse(epos.bh); |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 408 | epos.bh = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 409 | fibh->soffset -= udf_ext0_offset(dir); |
| 410 | fibh->eoffset -= udf_ext0_offset(dir); |
Jan Kara | af79329 | 2008-02-08 04:20:50 -0800 | [diff] [blame] | 411 | f_pos -= udf_ext0_offset(dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 412 | if (fibh->sbh != fibh->ebh) |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 413 | brelse(fibh->ebh); |
| 414 | brelse(fibh->sbh); |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 415 | fibh->sbh = fibh->ebh = |
| 416 | udf_expand_dir_adinicb(dir, &block, err); |
| 417 | if (!fibh->sbh) |
Jan Kara | b80697c | 2008-03-04 14:14:05 +0100 | [diff] [blame] | 418 | goto out_err; |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 419 | epos.block = dinfo->i_location; |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 420 | epos.offset = udf_file_entry_alloc_offset(dir); |
Jan Kara | 05343c4 | 2008-02-08 04:20:51 -0800 | [diff] [blame] | 421 | /* Load extent udf_expand_dir_adinicb() has created */ |
| 422 | udf_current_aext(dir, &epos, &eloc, &elen, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 423 | } |
| 424 | |
Jan Kara | 2c948b3 | 2009-12-03 13:39:28 +0100 | [diff] [blame] | 425 | /* Entry fits into current block? */ |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 426 | if (sb->s_blocksize - fibh->eoffset >= nfidlen) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 427 | fibh->soffset = fibh->eoffset; |
| 428 | fibh->eoffset += nfidlen; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 429 | if (fibh->sbh != fibh->ebh) { |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 430 | brelse(fibh->sbh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 431 | fibh->sbh = fibh->ebh; |
| 432 | } |
| 433 | |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 434 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { |
| 435 | block = dinfo->i_location.logicalBlockNum; |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 436 | fi = (struct fileIdentDesc *) |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 437 | (dinfo->i_ext.i_data + |
Marcin Slusarz | c0b3443 | 2008-02-08 04:20:42 -0800 | [diff] [blame] | 438 | fibh->soffset - |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 439 | udf_ext0_offset(dir) + |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 440 | dinfo->i_lenEAttr); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 441 | } else { |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 442 | block = eloc.logicalBlockNum + |
| 443 | ((elen - 1) >> |
| 444 | dir->i_sb->s_blocksize_bits); |
| 445 | fi = (struct fileIdentDesc *) |
| 446 | (fibh->sbh->b_data + fibh->soffset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 447 | } |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 448 | } else { |
Jan Kara | 2c948b3 | 2009-12-03 13:39:28 +0100 | [diff] [blame] | 449 | /* Round up last extent in the file */ |
| 450 | elen = (elen + sb->s_blocksize - 1) & ~(sb->s_blocksize - 1); |
| 451 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
| 452 | epos.offset -= sizeof(struct short_ad); |
| 453 | else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
| 454 | epos.offset -= sizeof(struct long_ad); |
| 455 | udf_write_aext(dir, &epos, &eloc, elen, 1); |
| 456 | dinfo->i_lenExtents = (dinfo->i_lenExtents + sb->s_blocksize |
| 457 | - 1) & ~(sb->s_blocksize - 1); |
| 458 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 459 | fibh->soffset = fibh->eoffset - sb->s_blocksize; |
| 460 | fibh->eoffset += nfidlen - sb->s_blocksize; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 461 | if (fibh->sbh != fibh->ebh) { |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 462 | brelse(fibh->sbh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 463 | fibh->sbh = fibh->ebh; |
| 464 | } |
| 465 | |
| 466 | block = eloc.logicalBlockNum + ((elen - 1) >> |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 467 | dir->i_sb->s_blocksize_bits); |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 468 | fibh->ebh = udf_bread(dir, |
Jan Kara | af79329 | 2008-02-08 04:20:50 -0800 | [diff] [blame] | 469 | f_pos >> dir->i_sb->s_blocksize_bits, 1, err); |
Jan Kara | b80697c | 2008-03-04 14:14:05 +0100 | [diff] [blame] | 470 | if (!fibh->ebh) |
| 471 | goto out_err; |
Jan Kara | 4651c59 | 2010-11-25 03:56:24 +0100 | [diff] [blame] | 472 | /* Extents could have been merged, invalidate our position */ |
| 473 | brelse(epos.bh); |
| 474 | epos.bh = NULL; |
| 475 | epos.block = dinfo->i_location; |
| 476 | epos.offset = udf_file_entry_alloc_offset(dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 477 | |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 478 | if (!fibh->soffset) { |
Jan Kara | 4651c59 | 2010-11-25 03:56:24 +0100 | [diff] [blame] | 479 | /* Find the freshly allocated block */ |
| 480 | while (udf_next_aext(dir, &epos, &eloc, &elen, 1) == |
| 481 | (EXT_RECORDED_ALLOCATED >> 30)) |
| 482 | ; |
| 483 | block = eloc.logicalBlockNum + ((elen - 1) >> |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 484 | dir->i_sb->s_blocksize_bits); |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 485 | brelse(fibh->sbh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 486 | fibh->sbh = fibh->ebh; |
| 487 | fi = (struct fileIdentDesc *)(fibh->sbh->b_data); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 488 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 489 | fi = (struct fileIdentDesc *) |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 490 | (fibh->sbh->b_data + sb->s_blocksize + |
| 491 | fibh->soffset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 492 | } |
| 493 | } |
| 494 | |
| 495 | memset(cfi, 0, sizeof(struct fileIdentDesc)); |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 496 | if (UDF_SB(sb)->s_udfrev >= 0x0200) |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 497 | udf_new_tag((char *)cfi, TAG_IDENT_FID, 3, 1, block, |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 498 | sizeof(struct tag)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 499 | else |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 500 | udf_new_tag((char *)cfi, TAG_IDENT_FID, 2, 1, block, |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 501 | sizeof(struct tag)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 502 | cfi->fileVersionNum = cpu_to_le16(1); |
| 503 | cfi->lengthFileIdent = namelen; |
| 504 | cfi->lengthOfImpUse = cpu_to_le16(0); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 505 | if (!udf_write_fi(dir, cfi, fi, fibh, NULL, name)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 506 | dir->i_size += nfidlen; |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 507 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
| 508 | dinfo->i_lenAlloc += nfidlen; |
Jan Kara | 2c948b3 | 2009-12-03 13:39:28 +0100 | [diff] [blame] | 509 | else { |
| 510 | /* Find the last extent and truncate it to proper size */ |
| 511 | while (udf_next_aext(dir, &epos, &eloc, &elen, 1) == |
| 512 | (EXT_RECORDED_ALLOCATED >> 30)) |
| 513 | ; |
| 514 | elen -= dinfo->i_lenExtents - dir->i_size; |
| 515 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
| 516 | epos.offset -= sizeof(struct short_ad); |
| 517 | else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
| 518 | epos.offset -= sizeof(struct long_ad); |
| 519 | udf_write_aext(dir, &epos, &eloc, elen, 1); |
| 520 | dinfo->i_lenExtents = dir->i_size; |
| 521 | } |
| 522 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 523 | mark_inode_dirty(dir); |
Jan Kara | b80697c | 2008-03-04 14:14:05 +0100 | [diff] [blame] | 524 | goto out_ok; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 525 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 526 | *err = -EIO; |
Jan Kara | b80697c | 2008-03-04 14:14:05 +0100 | [diff] [blame] | 527 | goto out_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 528 | } |
Jan Kara | b80697c | 2008-03-04 14:14:05 +0100 | [diff] [blame] | 529 | |
| 530 | out_err: |
| 531 | fi = NULL; |
| 532 | if (fibh->sbh != fibh->ebh) |
| 533 | brelse(fibh->ebh); |
| 534 | brelse(fibh->sbh); |
| 535 | out_ok: |
| 536 | brelse(epos.bh); |
| 537 | kfree(name); |
| 538 | return fi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 539 | } |
| 540 | |
| 541 | static int udf_delete_entry(struct inode *inode, struct fileIdentDesc *fi, |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 542 | struct udf_fileident_bh *fibh, |
| 543 | struct fileIdentDesc *cfi) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 544 | { |
| 545 | cfi->fileCharacteristics |= FID_FILE_CHAR_DELETED; |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 546 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 547 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT)) |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 548 | memset(&(cfi->icb), 0x00, sizeof(struct long_ad)); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 549 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 550 | return udf_write_fi(inode, cfi, fi, fibh, NULL, NULL); |
| 551 | } |
| 552 | |
Al Viro | 4acdaf2 | 2011-07-26 01:42:34 -0400 | [diff] [blame] | 553 | static int udf_create(struct inode *dir, struct dentry *dentry, umode_t mode, |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 554 | struct nameidata *nd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 555 | { |
| 556 | struct udf_fileident_bh fibh; |
| 557 | struct inode *inode; |
| 558 | struct fileIdentDesc cfi, *fi; |
| 559 | int err; |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 560 | struct udf_inode_info *iinfo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 561 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 562 | inode = udf_new_inode(dir, mode, &err); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 563 | if (!inode) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 564 | return err; |
| 565 | } |
| 566 | |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 567 | iinfo = UDF_I(inode); |
| 568 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 569 | inode->i_data.a_ops = &udf_adinicb_aops; |
| 570 | else |
| 571 | inode->i_data.a_ops = &udf_aops; |
| 572 | inode->i_op = &udf_file_inode_operations; |
| 573 | inode->i_fop = &udf_file_operations; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 574 | mark_inode_dirty(inode); |
| 575 | |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 576 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
| 577 | if (!fi) { |
Miklos Szeredi | 6d6b77f | 2011-10-28 14:13:28 +0200 | [diff] [blame] | 578 | inode_dec_link_count(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 579 | iput(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 580 | return err; |
| 581 | } |
| 582 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 583 | cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 584 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 585 | cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 586 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); |
Marcin Slusarz | c0b3443 | 2008-02-08 04:20:42 -0800 | [diff] [blame] | 587 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 588 | mark_inode_dirty(dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 589 | if (fibh.sbh != fibh.ebh) |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 590 | brelse(fibh.ebh); |
| 591 | brelse(fibh.sbh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 592 | d_instantiate(dentry, inode); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 593 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 594 | return 0; |
| 595 | } |
| 596 | |
Al Viro | 1a67aaf | 2011-07-26 01:52:52 -0400 | [diff] [blame] | 597 | static int udf_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 598 | dev_t rdev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 599 | { |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 600 | struct inode *inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 601 | struct udf_fileident_bh fibh; |
| 602 | struct fileIdentDesc cfi, *fi; |
| 603 | int err; |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 604 | struct udf_inode_info *iinfo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 605 | |
| 606 | if (!old_valid_dev(rdev)) |
| 607 | return -EINVAL; |
| 608 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 609 | err = -EIO; |
| 610 | inode = udf_new_inode(dir, mode, &err); |
| 611 | if (!inode) |
| 612 | goto out; |
| 613 | |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 614 | iinfo = UDF_I(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 615 | init_special_inode(inode, mode, rdev); |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 616 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
| 617 | if (!fi) { |
Miklos Szeredi | 6d6b77f | 2011-10-28 14:13:28 +0200 | [diff] [blame] | 618 | inode_dec_link_count(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 619 | iput(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 620 | return err; |
| 621 | } |
| 622 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 623 | cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 624 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 625 | cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 626 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); |
Marcin Slusarz | c0b3443 | 2008-02-08 04:20:42 -0800 | [diff] [blame] | 627 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 628 | mark_inode_dirty(dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 629 | mark_inode_dirty(inode); |
| 630 | |
| 631 | if (fibh.sbh != fibh.ebh) |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 632 | brelse(fibh.ebh); |
| 633 | brelse(fibh.sbh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 634 | d_instantiate(dentry, inode); |
| 635 | err = 0; |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 636 | |
| 637 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 638 | return err; |
| 639 | } |
| 640 | |
Al Viro | 18bb1db | 2011-07-26 01:41:39 -0400 | [diff] [blame] | 641 | static int udf_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 642 | { |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 643 | struct inode *inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 644 | struct udf_fileident_bh fibh; |
| 645 | struct fileIdentDesc cfi, *fi; |
| 646 | int err; |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 647 | struct udf_inode_info *dinfo = UDF_I(dir); |
| 648 | struct udf_inode_info *iinfo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 649 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 650 | err = -EIO; |
Dmitry Monakhov | a6c5a03 | 2010-03-04 17:32:22 +0300 | [diff] [blame] | 651 | inode = udf_new_inode(dir, S_IFDIR | mode, &err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 652 | if (!inode) |
| 653 | goto out; |
| 654 | |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 655 | iinfo = UDF_I(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 656 | inode->i_op = &udf_dir_inode_operations; |
| 657 | inode->i_fop = &udf_dir_operations; |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 658 | fi = udf_add_entry(inode, NULL, &fibh, &cfi, &err); |
| 659 | if (!fi) { |
Miklos Szeredi | 6d6b77f | 2011-10-28 14:13:28 +0200 | [diff] [blame] | 660 | inode_dec_link_count(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 661 | iput(inode); |
| 662 | goto out; |
| 663 | } |
Miklos Szeredi | bfe8684 | 2011-10-28 14:13:29 +0200 | [diff] [blame] | 664 | set_nlink(inode, 2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 665 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 666 | cfi.icb.extLocation = cpu_to_lelb(dinfo->i_location); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 667 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 668 | cpu_to_le32(dinfo->i_unique & 0x00000000FFFFFFFFUL); |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 669 | cfi.fileCharacteristics = |
| 670 | FID_FILE_CHAR_DIRECTORY | FID_FILE_CHAR_PARENT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 671 | udf_write_fi(inode, &cfi, fi, &fibh, NULL, NULL); |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 672 | brelse(fibh.sbh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 673 | mark_inode_dirty(inode); |
| 674 | |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 675 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
| 676 | if (!fi) { |
Miklos Szeredi | 6d6b77f | 2011-10-28 14:13:28 +0200 | [diff] [blame] | 677 | clear_nlink(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 678 | mark_inode_dirty(inode); |
| 679 | iput(inode); |
| 680 | goto out; |
| 681 | } |
| 682 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 683 | cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 684 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 685 | cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 686 | cfi.fileCharacteristics |= FID_FILE_CHAR_DIRECTORY; |
| 687 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); |
Dave Hansen | d8c76e6 | 2006-09-30 23:29:04 -0700 | [diff] [blame] | 688 | inc_nlink(dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 689 | mark_inode_dirty(dir); |
| 690 | d_instantiate(dentry, inode); |
| 691 | if (fibh.sbh != fibh.ebh) |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 692 | brelse(fibh.ebh); |
| 693 | brelse(fibh.sbh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 694 | err = 0; |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 695 | |
| 696 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 697 | return err; |
| 698 | } |
| 699 | |
| 700 | static int empty_dir(struct inode *dir) |
| 701 | { |
| 702 | struct fileIdentDesc *fi, cfi; |
| 703 | struct udf_fileident_bh fibh; |
| 704 | loff_t f_pos; |
Jan Kara | af79329 | 2008-02-08 04:20:50 -0800 | [diff] [blame] | 705 | loff_t size = udf_ext0_offset(dir) + dir->i_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 706 | int block; |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 707 | struct kernel_lb_addr eloc; |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 708 | uint32_t elen; |
Jan Kara | 60448b1 | 2007-05-08 00:35:13 -0700 | [diff] [blame] | 709 | sector_t offset; |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 710 | struct extent_position epos = {}; |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 711 | struct udf_inode_info *dinfo = UDF_I(dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 712 | |
Jan Kara | af79329 | 2008-02-08 04:20:50 -0800 | [diff] [blame] | 713 | f_pos = udf_ext0_offset(dir); |
| 714 | fibh.soffset = fibh.eoffset = f_pos & (dir->i_sb->s_blocksize - 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 715 | |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 716 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 717 | fibh.sbh = fibh.ebh = NULL; |
Jan Kara | af79329 | 2008-02-08 04:20:50 -0800 | [diff] [blame] | 718 | 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] | 719 | &epos, &eloc, &elen, &offset) == |
| 720 | (EXT_RECORDED_ALLOCATED >> 30)) { |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 721 | block = udf_get_lb_pblock(dir->i_sb, &eloc, offset); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 722 | if ((++offset << dir->i_sb->s_blocksize_bits) < elen) { |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 723 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 724 | epos.offset -= sizeof(struct short_ad); |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 725 | else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 726 | epos.offset -= sizeof(struct long_ad); |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 727 | } else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 728 | offset = 0; |
| 729 | |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 730 | fibh.sbh = fibh.ebh = udf_tread(dir->i_sb, block); |
| 731 | if (!fibh.sbh) { |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 732 | brelse(epos.bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 733 | return 0; |
| 734 | } |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 735 | } else { |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 736 | brelse(epos.bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 737 | return 0; |
| 738 | } |
| 739 | |
Jan Kara | af79329 | 2008-02-08 04:20:50 -0800 | [diff] [blame] | 740 | while (f_pos < size) { |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 741 | fi = udf_fileident_read(dir, &f_pos, &fibh, &cfi, &epos, &eloc, |
| 742 | &elen, &offset); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 743 | if (!fi) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 744 | if (fibh.sbh != fibh.ebh) |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 745 | brelse(fibh.ebh); |
| 746 | brelse(fibh.sbh); |
| 747 | brelse(epos.bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 748 | return 0; |
| 749 | } |
| 750 | |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 751 | if (cfi.lengthFileIdent && |
| 752 | (cfi.fileCharacteristics & FID_FILE_CHAR_DELETED) == 0) { |
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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 761 | if (fibh.sbh != fibh.ebh) |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 762 | brelse(fibh.ebh); |
| 763 | brelse(fibh.sbh); |
| 764 | brelse(epos.bh); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 765 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 766 | return 1; |
| 767 | } |
| 768 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 769 | static int udf_rmdir(struct inode *dir, struct dentry *dentry) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 770 | { |
| 771 | int retval; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 772 | struct inode *inode = dentry->d_inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 773 | struct udf_fileident_bh fibh; |
| 774 | struct fileIdentDesc *fi, cfi; |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 775 | struct kernel_lb_addr tloc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 776 | |
| 777 | retval = -ENOENT; |
Al Viro | 9fbb76c | 2008-10-12 00:15:17 -0400 | [diff] [blame] | 778 | fi = udf_find_entry(dir, &dentry->d_name, &fibh, &cfi); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 779 | if (!fi) |
| 780 | goto out; |
| 781 | |
| 782 | retval = -EIO; |
| 783 | tloc = lelb_to_cpu(cfi.icb.extLocation); |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 784 | 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] | 785 | goto end_rmdir; |
| 786 | retval = -ENOTEMPTY; |
| 787 | if (!empty_dir(inode)) |
| 788 | goto end_rmdir; |
| 789 | retval = udf_delete_entry(dir, fi, &fibh, &cfi); |
| 790 | if (retval) |
| 791 | goto end_rmdir; |
| 792 | if (inode->i_nlink != 2) |
Joe Perches | a40ecd7 | 2011-10-10 01:08:04 -0700 | [diff] [blame] | 793 | udf_warn(inode->i_sb, "empty directory has nlink != 2 (%d)\n", |
| 794 | inode->i_nlink); |
Dave Hansen | ce71ec3 | 2006-09-30 23:29:06 -0700 | [diff] [blame] | 795 | clear_nlink(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 796 | inode->i_size = 0; |
Stephen Mollett | c007c06 | 2007-05-08 00:31:31 -0700 | [diff] [blame] | 797 | inode_dec_link_count(dir); |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 798 | inode->i_ctime = dir->i_ctime = dir->i_mtime = |
| 799 | current_fs_time(dir->i_sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 800 | mark_inode_dirty(dir); |
| 801 | |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 802 | end_rmdir: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 803 | if (fibh.sbh != fibh.ebh) |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 804 | brelse(fibh.ebh); |
| 805 | brelse(fibh.sbh); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 806 | |
| 807 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 808 | return retval; |
| 809 | } |
| 810 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 811 | static int udf_unlink(struct inode *dir, struct dentry *dentry) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 812 | { |
| 813 | int retval; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 814 | struct inode *inode = dentry->d_inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 815 | struct udf_fileident_bh fibh; |
| 816 | struct fileIdentDesc *fi; |
| 817 | struct fileIdentDesc cfi; |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 818 | struct kernel_lb_addr tloc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 819 | |
| 820 | retval = -ENOENT; |
Al Viro | 9fbb76c | 2008-10-12 00:15:17 -0400 | [diff] [blame] | 821 | fi = udf_find_entry(dir, &dentry->d_name, &fibh, &cfi); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 822 | if (!fi) |
| 823 | goto out; |
| 824 | |
| 825 | retval = -EIO; |
| 826 | tloc = lelb_to_cpu(cfi.icb.extLocation); |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 827 | 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] | 828 | goto end_unlink; |
| 829 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 830 | if (!inode->i_nlink) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 831 | udf_debug("Deleting nonexistent file (%lu), %d\n", |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 832 | inode->i_ino, inode->i_nlink); |
Miklos Szeredi | bfe8684 | 2011-10-28 14:13:29 +0200 | [diff] [blame] | 833 | set_nlink(inode, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 834 | } |
| 835 | retval = udf_delete_entry(dir, fi, &fibh, &cfi); |
| 836 | if (retval) |
| 837 | goto end_unlink; |
| 838 | dir->i_ctime = dir->i_mtime = current_fs_time(dir->i_sb); |
| 839 | mark_inode_dirty(dir); |
Dave Hansen | 9a53c3a | 2006-09-30 23:29:03 -0700 | [diff] [blame] | 840 | inode_dec_link_count(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 841 | inode->i_ctime = dir->i_ctime; |
| 842 | retval = 0; |
| 843 | |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 844 | end_unlink: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 845 | if (fibh.sbh != fibh.ebh) |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 846 | brelse(fibh.ebh); |
| 847 | brelse(fibh.sbh); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 848 | |
| 849 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 850 | return retval; |
| 851 | } |
| 852 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 853 | static int udf_symlink(struct inode *dir, struct dentry *dentry, |
| 854 | const char *symname) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 855 | { |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 856 | struct inode *inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 857 | struct pathComponent *pc; |
Al Viro | 391e8bb | 2010-01-31 21:28:48 -0500 | [diff] [blame] | 858 | const char *compstart; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 859 | struct udf_fileident_bh fibh; |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 860 | struct extent_position epos = {}; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 861 | int eoffset, elen = 0; |
| 862 | struct fileIdentDesc *fi; |
| 863 | struct fileIdentDesc cfi; |
Al Viro | 391e8bb | 2010-01-31 21:28:48 -0500 | [diff] [blame] | 864 | uint8_t *ea; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 865 | int err; |
| 866 | int block; |
Al Viro | 391e8bb | 2010-01-31 21:28:48 -0500 | [diff] [blame] | 867 | unsigned char *name = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 868 | int namelen; |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 869 | struct udf_inode_info *iinfo; |
Jan Kara | d664b6a | 2010-10-20 18:28:46 +0200 | [diff] [blame] | 870 | struct super_block *sb = dir->i_sb; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 871 | |
Dmitry Monakhov | a6c5a03 | 2010-03-04 17:32:22 +0300 | [diff] [blame] | 872 | inode = udf_new_inode(dir, S_IFLNK | S_IRWXUGO, &err); |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 873 | if (!inode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 874 | goto out; |
| 875 | |
Alessio Igor Bogani | 4d0fb62 | 2010-11-16 18:40:47 +0100 | [diff] [blame] | 876 | iinfo = UDF_I(inode); |
| 877 | down_write(&iinfo->i_data_sem); |
Jan Kara | b80697c | 2008-03-04 14:14:05 +0100 | [diff] [blame] | 878 | name = kmalloc(UDF_NAME_LEN, GFP_NOFS); |
| 879 | if (!name) { |
| 880 | err = -ENOMEM; |
| 881 | goto out_no_entry; |
| 882 | } |
| 883 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 884 | inode->i_data.a_ops = &udf_symlink_aops; |
Dmitry Monakhov | c15d0fc | 2010-03-29 11:05:21 +0400 | [diff] [blame] | 885 | inode->i_op = &udf_symlink_inode_operations; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 886 | |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 887 | if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 888 | struct kernel_lb_addr eloc; |
Harvey Harrison | 78e917d | 2008-04-28 02:16:19 -0700 | [diff] [blame] | 889 | uint32_t bsize; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 890 | |
Jan Kara | d664b6a | 2010-10-20 18:28:46 +0200 | [diff] [blame] | 891 | block = udf_new_block(sb, inode, |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 892 | iinfo->i_location.partitionReferenceNum, |
| 893 | iinfo->i_location.logicalBlockNum, &err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 894 | if (!block) |
| 895 | goto out_no_entry; |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 896 | epos.block = iinfo->i_location; |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 897 | epos.offset = udf_file_entry_alloc_offset(inode); |
| 898 | epos.bh = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 899 | eloc.logicalBlockNum = block; |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 900 | eloc.partitionReferenceNum = |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 901 | iinfo->i_location.partitionReferenceNum; |
Jan Kara | d664b6a | 2010-10-20 18:28:46 +0200 | [diff] [blame] | 902 | bsize = sb->s_blocksize; |
Harvey Harrison | 78e917d | 2008-04-28 02:16:19 -0700 | [diff] [blame] | 903 | iinfo->i_lenExtents = bsize; |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 904 | udf_add_aext(inode, &epos, &eloc, bsize, 0); |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 905 | brelse(epos.bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 906 | |
Jan Kara | d664b6a | 2010-10-20 18:28:46 +0200 | [diff] [blame] | 907 | block = udf_get_pblock(sb, block, |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 908 | iinfo->i_location.partitionReferenceNum, |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 909 | 0); |
Jan Kara | d664b6a | 2010-10-20 18:28:46 +0200 | [diff] [blame] | 910 | epos.bh = udf_tgetblk(sb, block); |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 911 | lock_buffer(epos.bh); |
Jan Kara | d664b6a | 2010-10-20 18:28:46 +0200 | [diff] [blame] | 912 | memset(epos.bh->b_data, 0x00, bsize); |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 913 | set_buffer_uptodate(epos.bh); |
| 914 | unlock_buffer(epos.bh); |
| 915 | mark_buffer_dirty_inode(epos.bh, inode); |
| 916 | ea = epos.bh->b_data + udf_ext0_offset(inode); |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 917 | } else |
| 918 | ea = iinfo->i_ext.i_data + iinfo->i_lenEAttr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 919 | |
Jan Kara | d664b6a | 2010-10-20 18:28:46 +0200 | [diff] [blame] | 920 | eoffset = sb->s_blocksize - udf_ext0_offset(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 921 | pc = (struct pathComponent *)ea; |
| 922 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 923 | if (*symname == '/') { |
| 924 | do { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 925 | symname++; |
| 926 | } while (*symname == '/'); |
| 927 | |
| 928 | pc->componentType = 1; |
| 929 | pc->lengthComponentIdent = 0; |
| 930 | pc->componentFileVersionNum = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 931 | elen += sizeof(struct pathComponent); |
| 932 | } |
| 933 | |
| 934 | err = -ENAMETOOLONG; |
| 935 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 936 | while (*symname) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 937 | if (elen + sizeof(struct pathComponent) > eoffset) |
| 938 | goto out_no_entry; |
| 939 | |
| 940 | pc = (struct pathComponent *)(ea + elen); |
| 941 | |
Al Viro | 391e8bb | 2010-01-31 21:28:48 -0500 | [diff] [blame] | 942 | compstart = symname; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 943 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 944 | do { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 945 | symname++; |
| 946 | } while (*symname && *symname != '/'); |
| 947 | |
| 948 | pc->componentType = 5; |
| 949 | pc->lengthComponentIdent = 0; |
| 950 | pc->componentFileVersionNum = 0; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 951 | if (compstart[0] == '.') { |
| 952 | if ((symname - compstart) == 1) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 953 | pc->componentType = 4; |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 954 | else if ((symname - compstart) == 2 && |
| 955 | compstart[1] == '.') |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 956 | pc->componentType = 3; |
| 957 | } |
| 958 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 959 | if (pc->componentType == 5) { |
Jan Kara | d664b6a | 2010-10-20 18:28:46 +0200 | [diff] [blame] | 960 | namelen = udf_put_filename(sb, compstart, name, |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 961 | symname - compstart); |
| 962 | if (!namelen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 963 | goto out_no_entry; |
| 964 | |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 965 | if (elen + sizeof(struct pathComponent) + namelen > |
| 966 | eoffset) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 967 | goto out_no_entry; |
| 968 | else |
| 969 | pc->lengthComponentIdent = namelen; |
| 970 | |
| 971 | memcpy(pc->componentIdent, name, namelen); |
| 972 | } |
| 973 | |
| 974 | elen += sizeof(struct pathComponent) + pc->lengthComponentIdent; |
| 975 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 976 | if (*symname) { |
| 977 | do { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 978 | symname++; |
| 979 | } while (*symname == '/'); |
| 980 | } |
| 981 | } |
| 982 | |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 983 | brelse(epos.bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 984 | inode->i_size = elen; |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 985 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
| 986 | iinfo->i_lenAlloc = inode->i_size; |
Jan Kara | 2c948b3 | 2009-12-03 13:39:28 +0100 | [diff] [blame] | 987 | else |
| 988 | udf_truncate_tail_extent(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 989 | mark_inode_dirty(inode); |
| 990 | |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 991 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
| 992 | if (!fi) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 993 | goto out_no_entry; |
Jan Kara | d664b6a | 2010-10-20 18:28:46 +0200 | [diff] [blame] | 994 | cfi.icb.extLength = cpu_to_le32(sb->s_blocksize); |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 995 | cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); |
Jan Kara | d664b6a | 2010-10-20 18:28:46 +0200 | [diff] [blame] | 996 | if (UDF_SB(inode->i_sb)->s_lvid_bh) { |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 997 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
Jan Kara | d664b6a | 2010-10-20 18:28:46 +0200 | [diff] [blame] | 998 | cpu_to_le32(lvid_get_unique_id(sb)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 999 | } |
| 1000 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); |
Marcin Slusarz | c0b3443 | 2008-02-08 04:20:42 -0800 | [diff] [blame] | 1001 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1002 | mark_inode_dirty(dir); |
Alessio Igor Bogani | 4d0fb62 | 2010-11-16 18:40:47 +0100 | [diff] [blame] | 1003 | up_write(&iinfo->i_data_sem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1004 | if (fibh.sbh != fibh.ebh) |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 1005 | brelse(fibh.ebh); |
| 1006 | brelse(fibh.sbh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1007 | d_instantiate(dentry, inode); |
| 1008 | err = 0; |
| 1009 | |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1010 | out: |
Jan Kara | b80697c | 2008-03-04 14:14:05 +0100 | [diff] [blame] | 1011 | kfree(name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1012 | return err; |
| 1013 | |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1014 | out_no_entry: |
Alessio Igor Bogani | 4d0fb62 | 2010-11-16 18:40:47 +0100 | [diff] [blame] | 1015 | up_write(&iinfo->i_data_sem); |
Dave Hansen | 9a53c3a | 2006-09-30 23:29:03 -0700 | [diff] [blame] | 1016 | inode_dec_link_count(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1017 | iput(inode); |
| 1018 | goto out; |
| 1019 | } |
| 1020 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1021 | static int udf_link(struct dentry *old_dentry, struct inode *dir, |
| 1022 | struct dentry *dentry) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1023 | { |
| 1024 | struct inode *inode = old_dentry->d_inode; |
| 1025 | struct udf_fileident_bh fibh; |
| 1026 | struct fileIdentDesc cfi, *fi; |
| 1027 | int err; |
| 1028 | |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1029 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
| 1030 | if (!fi) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1031 | return err; |
| 1032 | } |
| 1033 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); |
Marcin Slusarz | c0b3443 | 2008-02-08 04:20:42 -0800 | [diff] [blame] | 1034 | cfi.icb.extLocation = cpu_to_lelb(UDF_I(inode)->i_location); |
Jan Kara | d664b6a | 2010-10-20 18:28:46 +0200 | [diff] [blame] | 1035 | if (UDF_SB(inode->i_sb)->s_lvid_bh) { |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1036 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
Jan Kara | d664b6a | 2010-10-20 18:28:46 +0200 | [diff] [blame] | 1037 | cpu_to_le32(lvid_get_unique_id(inode->i_sb)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1038 | } |
| 1039 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); |
Marcin Slusarz | c0b3443 | 2008-02-08 04:20:42 -0800 | [diff] [blame] | 1040 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1041 | mark_inode_dirty(dir); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1042 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1043 | if (fibh.sbh != fibh.ebh) |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 1044 | brelse(fibh.ebh); |
| 1045 | brelse(fibh.sbh); |
Dave Hansen | d8c76e6 | 2006-09-30 23:29:04 -0700 | [diff] [blame] | 1046 | inc_nlink(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1047 | inode->i_ctime = current_fs_time(inode->i_sb); |
| 1048 | mark_inode_dirty(inode); |
Al Viro | 7de9c6e | 2010-10-23 11:11:40 -0400 | [diff] [blame] | 1049 | ihold(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1050 | d_instantiate(dentry, inode); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1051 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1052 | return 0; |
| 1053 | } |
| 1054 | |
| 1055 | /* Anybody can rename anything with this: the permission checks are left to the |
| 1056 | * higher-level routines. |
| 1057 | */ |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1058 | static int udf_rename(struct inode *old_dir, struct dentry *old_dentry, |
| 1059 | struct inode *new_dir, struct dentry *new_dentry) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1060 | { |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1061 | struct inode *old_inode = old_dentry->d_inode; |
| 1062 | struct inode *new_inode = new_dentry->d_inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1063 | struct udf_fileident_bh ofibh, nfibh; |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1064 | struct fileIdentDesc *ofi = NULL, *nfi = NULL, *dir_fi = NULL; |
| 1065 | struct fileIdentDesc ocfi, ncfi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1066 | struct buffer_head *dir_bh = NULL; |
| 1067 | int retval = -ENOENT; |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 1068 | struct kernel_lb_addr tloc; |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 1069 | struct udf_inode_info *old_iinfo = UDF_I(old_inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1070 | |
Al Viro | 9fbb76c | 2008-10-12 00:15:17 -0400 | [diff] [blame] | 1071 | ofi = udf_find_entry(old_dir, &old_dentry->d_name, &ofibh, &ocfi); |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1072 | if (ofi) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1073 | if (ofibh.sbh != ofibh.ebh) |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 1074 | brelse(ofibh.ebh); |
| 1075 | brelse(ofibh.sbh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1076 | } |
| 1077 | tloc = lelb_to_cpu(ocfi.icb.extLocation); |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 1078 | if (!ofi || udf_get_lb_pblock(old_dir->i_sb, &tloc, 0) |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1079 | != old_inode->i_ino) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1080 | goto end_rename; |
| 1081 | |
Al Viro | 9fbb76c | 2008-10-12 00:15:17 -0400 | [diff] [blame] | 1082 | nfi = udf_find_entry(new_dir, &new_dentry->d_name, &nfibh, &ncfi); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1083 | if (nfi) { |
| 1084 | if (!new_inode) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1085 | if (nfibh.sbh != nfibh.ebh) |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 1086 | brelse(nfibh.ebh); |
| 1087 | brelse(nfibh.sbh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1088 | nfi = NULL; |
| 1089 | } |
| 1090 | } |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1091 | if (S_ISDIR(old_inode->i_mode)) { |
Marcin Slusarz | 7f3fbd0 | 2008-02-08 04:20:49 -0800 | [diff] [blame] | 1092 | int offset = udf_ext0_offset(old_inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1093 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1094 | if (new_inode) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1095 | retval = -ENOTEMPTY; |
| 1096 | if (!empty_dir(new_inode)) |
| 1097 | goto end_rename; |
| 1098 | } |
| 1099 | retval = -EIO; |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 1100 | if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1101 | dir_fi = udf_get_fileident( |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 1102 | old_iinfo->i_ext.i_data - |
| 1103 | (old_iinfo->i_efe ? |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1104 | sizeof(struct extendedFileEntry) : |
| 1105 | sizeof(struct fileEntry)), |
| 1106 | old_inode->i_sb->s_blocksize, &offset); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1107 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1108 | dir_bh = udf_bread(old_inode, 0, 0, &retval); |
| 1109 | if (!dir_bh) |
| 1110 | goto end_rename; |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1111 | dir_fi = udf_get_fileident(dir_bh->b_data, |
| 1112 | old_inode->i_sb->s_blocksize, &offset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1113 | } |
| 1114 | if (!dir_fi) |
| 1115 | goto end_rename; |
| 1116 | tloc = lelb_to_cpu(dir_fi->icb.extLocation); |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 1117 | if (udf_get_lb_pblock(old_inode->i_sb, &tloc, 0) != |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1118 | old_dir->i_ino) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1119 | goto end_rename; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1120 | } |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1121 | if (!nfi) { |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1122 | nfi = udf_add_entry(new_dir, new_dentry, &nfibh, &ncfi, |
| 1123 | &retval); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1124 | if (!nfi) |
| 1125 | goto end_rename; |
| 1126 | } |
| 1127 | |
| 1128 | /* |
| 1129 | * Like most other Unix systems, set the ctime for inodes on a |
| 1130 | * rename. |
| 1131 | */ |
| 1132 | old_inode->i_ctime = current_fs_time(old_inode->i_sb); |
| 1133 | mark_inode_dirty(old_inode); |
| 1134 | |
| 1135 | /* |
| 1136 | * ok, that's it |
| 1137 | */ |
| 1138 | ncfi.fileVersionNum = ocfi.fileVersionNum; |
| 1139 | ncfi.fileCharacteristics = ocfi.fileCharacteristics; |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 1140 | memcpy(&(ncfi.icb), &(ocfi.icb), sizeof(struct long_ad)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1141 | udf_write_fi(new_dir, &ncfi, nfi, &nfibh, NULL, NULL); |
| 1142 | |
| 1143 | /* The old fid may have moved - find it again */ |
Al Viro | 9fbb76c | 2008-10-12 00:15:17 -0400 | [diff] [blame] | 1144 | ofi = udf_find_entry(old_dir, &old_dentry->d_name, &ofibh, &ocfi); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1145 | udf_delete_entry(old_dir, ofi, &ofibh, &ocfi); |
| 1146 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1147 | if (new_inode) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1148 | new_inode->i_ctime = current_fs_time(new_inode->i_sb); |
Dave Hansen | 9a53c3a | 2006-09-30 23:29:03 -0700 | [diff] [blame] | 1149 | inode_dec_link_count(new_inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1150 | } |
| 1151 | old_dir->i_ctime = old_dir->i_mtime = current_fs_time(old_dir->i_sb); |
| 1152 | mark_inode_dirty(old_dir); |
| 1153 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1154 | if (dir_fi) { |
Marcin Slusarz | c0b3443 | 2008-02-08 04:20:42 -0800 | [diff] [blame] | 1155 | 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] | 1156 | udf_update_tag((char *)dir_fi, |
| 1157 | (sizeof(struct fileIdentDesc) + |
| 1158 | le16_to_cpu(dir_fi->lengthOfImpUse) + 3) & ~3); |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 1159 | if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1160 | mark_inode_dirty(old_inode); |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1161 | else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1162 | mark_buffer_dirty_inode(dir_bh, old_inode); |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1163 | |
Dave Hansen | 9a53c3a | 2006-09-30 23:29:03 -0700 | [diff] [blame] | 1164 | inode_dec_link_count(old_dir); |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1165 | if (new_inode) |
Dave Hansen | 9a53c3a | 2006-09-30 23:29:03 -0700 | [diff] [blame] | 1166 | inode_dec_link_count(new_inode); |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1167 | else { |
Dave Hansen | d8c76e6 | 2006-09-30 23:29:04 -0700 | [diff] [blame] | 1168 | inc_nlink(new_dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1169 | mark_inode_dirty(new_dir); |
| 1170 | } |
| 1171 | } |
| 1172 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1173 | if (ofi) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1174 | if (ofibh.sbh != ofibh.ebh) |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 1175 | brelse(ofibh.ebh); |
| 1176 | brelse(ofibh.sbh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1177 | } |
| 1178 | |
| 1179 | retval = 0; |
| 1180 | |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1181 | end_rename: |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 1182 | brelse(dir_bh); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1183 | if (nfi) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1184 | if (nfibh.sbh != nfibh.ebh) |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 1185 | brelse(nfibh.ebh); |
| 1186 | brelse(nfibh.sbh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1187 | } |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1188 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1189 | return retval; |
| 1190 | } |
| 1191 | |
Rasmus Rohde | 221e583 | 2008-04-30 17:22:06 +0200 | [diff] [blame] | 1192 | static struct dentry *udf_get_parent(struct dentry *child) |
| 1193 | { |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 1194 | struct kernel_lb_addr tloc; |
Rasmus Rohde | 221e583 | 2008-04-30 17:22:06 +0200 | [diff] [blame] | 1195 | struct inode *inode = NULL; |
Al Viro | 9fbb76c | 2008-10-12 00:15:17 -0400 | [diff] [blame] | 1196 | struct qstr dotdot = {.name = "..", .len = 2}; |
Rasmus Rohde | 221e583 | 2008-04-30 17:22:06 +0200 | [diff] [blame] | 1197 | struct fileIdentDesc cfi; |
| 1198 | struct udf_fileident_bh fibh; |
| 1199 | |
Rasmus Rohde | 221e583 | 2008-04-30 17:22:06 +0200 | [diff] [blame] | 1200 | if (!udf_find_entry(child->d_inode, &dotdot, &fibh, &cfi)) |
| 1201 | goto out_unlock; |
| 1202 | |
| 1203 | if (fibh.sbh != fibh.ebh) |
| 1204 | brelse(fibh.ebh); |
| 1205 | brelse(fibh.sbh); |
| 1206 | |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 1207 | tloc = lelb_to_cpu(cfi.icb.extLocation); |
| 1208 | inode = udf_iget(child->d_inode->i_sb, &tloc); |
Rasmus Rohde | 221e583 | 2008-04-30 17:22:06 +0200 | [diff] [blame] | 1209 | if (!inode) |
| 1210 | goto out_unlock; |
Rasmus Rohde | 221e583 | 2008-04-30 17:22:06 +0200 | [diff] [blame] | 1211 | |
Christoph Hellwig | 4400372 | 2008-08-11 15:49:04 +0200 | [diff] [blame] | 1212 | return d_obtain_alias(inode); |
Rasmus Rohde | 221e583 | 2008-04-30 17:22:06 +0200 | [diff] [blame] | 1213 | out_unlock: |
Rasmus Rohde | 221e583 | 2008-04-30 17:22:06 +0200 | [diff] [blame] | 1214 | return ERR_PTR(-EACCES); |
| 1215 | } |
| 1216 | |
| 1217 | |
| 1218 | static struct dentry *udf_nfs_get_inode(struct super_block *sb, u32 block, |
| 1219 | u16 partref, __u32 generation) |
| 1220 | { |
| 1221 | struct inode *inode; |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 1222 | struct kernel_lb_addr loc; |
Rasmus Rohde | 221e583 | 2008-04-30 17:22:06 +0200 | [diff] [blame] | 1223 | |
| 1224 | if (block == 0) |
| 1225 | return ERR_PTR(-ESTALE); |
| 1226 | |
| 1227 | loc.logicalBlockNum = block; |
| 1228 | loc.partitionReferenceNum = partref; |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 1229 | inode = udf_iget(sb, &loc); |
Rasmus Rohde | 221e583 | 2008-04-30 17:22:06 +0200 | [diff] [blame] | 1230 | |
| 1231 | if (inode == NULL) |
| 1232 | return ERR_PTR(-ENOMEM); |
| 1233 | |
| 1234 | if (generation && inode->i_generation != generation) { |
| 1235 | iput(inode); |
| 1236 | return ERR_PTR(-ESTALE); |
| 1237 | } |
Christoph Hellwig | 4400372 | 2008-08-11 15:49:04 +0200 | [diff] [blame] | 1238 | return d_obtain_alias(inode); |
Rasmus Rohde | 221e583 | 2008-04-30 17:22:06 +0200 | [diff] [blame] | 1239 | } |
| 1240 | |
| 1241 | static struct dentry *udf_fh_to_dentry(struct super_block *sb, |
| 1242 | struct fid *fid, int fh_len, int fh_type) |
| 1243 | { |
| 1244 | if ((fh_len != 3 && fh_len != 5) || |
| 1245 | (fh_type != FILEID_UDF_WITH_PARENT && |
| 1246 | fh_type != FILEID_UDF_WITHOUT_PARENT)) |
| 1247 | return NULL; |
| 1248 | |
| 1249 | return udf_nfs_get_inode(sb, fid->udf.block, fid->udf.partref, |
| 1250 | fid->udf.generation); |
| 1251 | } |
| 1252 | |
| 1253 | static struct dentry *udf_fh_to_parent(struct super_block *sb, |
| 1254 | struct fid *fid, int fh_len, int fh_type) |
| 1255 | { |
| 1256 | if (fh_len != 5 || fh_type != FILEID_UDF_WITH_PARENT) |
| 1257 | return NULL; |
| 1258 | |
| 1259 | return udf_nfs_get_inode(sb, fid->udf.parent_block, |
| 1260 | fid->udf.parent_partref, |
| 1261 | fid->udf.parent_generation); |
| 1262 | } |
| 1263 | static int udf_encode_fh(struct dentry *de, __u32 *fh, int *lenp, |
| 1264 | int connectable) |
| 1265 | { |
| 1266 | int len = *lenp; |
| 1267 | struct inode *inode = de->d_inode; |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 1268 | struct kernel_lb_addr location = UDF_I(inode)->i_location; |
Rasmus Rohde | 221e583 | 2008-04-30 17:22:06 +0200 | [diff] [blame] | 1269 | struct fid *fid = (struct fid *)fh; |
| 1270 | int type = FILEID_UDF_WITHOUT_PARENT; |
| 1271 | |
Aneesh Kumar K.V | 5fe0c23 | 2011-01-29 18:43:25 +0530 | [diff] [blame] | 1272 | if (connectable && (len < 5)) { |
| 1273 | *lenp = 5; |
Rasmus Rohde | 221e583 | 2008-04-30 17:22:06 +0200 | [diff] [blame] | 1274 | return 255; |
Aneesh Kumar K.V | 5fe0c23 | 2011-01-29 18:43:25 +0530 | [diff] [blame] | 1275 | } else if (len < 3) { |
| 1276 | *lenp = 3; |
| 1277 | return 255; |
| 1278 | } |
Rasmus Rohde | 221e583 | 2008-04-30 17:22:06 +0200 | [diff] [blame] | 1279 | |
| 1280 | *lenp = 3; |
| 1281 | fid->udf.block = location.logicalBlockNum; |
| 1282 | fid->udf.partref = location.partitionReferenceNum; |
| 1283 | fid->udf.generation = inode->i_generation; |
| 1284 | |
| 1285 | if (connectable && !S_ISDIR(inode->i_mode)) { |
| 1286 | spin_lock(&de->d_lock); |
| 1287 | inode = de->d_parent->d_inode; |
| 1288 | location = UDF_I(inode)->i_location; |
| 1289 | fid->udf.parent_block = location.logicalBlockNum; |
| 1290 | fid->udf.parent_partref = location.partitionReferenceNum; |
| 1291 | fid->udf.parent_generation = inode->i_generation; |
| 1292 | spin_unlock(&de->d_lock); |
| 1293 | *lenp = 5; |
| 1294 | type = FILEID_UDF_WITH_PARENT; |
| 1295 | } |
| 1296 | |
| 1297 | return type; |
| 1298 | } |
| 1299 | |
| 1300 | const struct export_operations udf_export_ops = { |
| 1301 | .encode_fh = udf_encode_fh, |
| 1302 | .fh_to_dentry = udf_fh_to_dentry, |
| 1303 | .fh_to_parent = udf_fh_to_parent, |
| 1304 | .get_parent = udf_get_parent, |
| 1305 | }; |
| 1306 | |
Arjan van de Ven | c5ef1c4 | 2007-02-12 00:55:40 -0800 | [diff] [blame] | 1307 | const struct inode_operations udf_dir_inode_operations = { |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1308 | .lookup = udf_lookup, |
| 1309 | .create = udf_create, |
| 1310 | .link = udf_link, |
| 1311 | .unlink = udf_unlink, |
| 1312 | .symlink = udf_symlink, |
| 1313 | .mkdir = udf_mkdir, |
| 1314 | .rmdir = udf_rmdir, |
| 1315 | .mknod = udf_mknod, |
| 1316 | .rename = udf_rename, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1317 | }; |
Dmitry Monakhov | c15d0fc | 2010-03-29 11:05:21 +0400 | [diff] [blame] | 1318 | const struct inode_operations udf_symlink_inode_operations = { |
| 1319 | .readlink = generic_readlink, |
| 1320 | .follow_link = page_follow_link_light, |
| 1321 | .put_link = page_put_link, |
Dmitry Monakhov | c15d0fc | 2010-03-29 11:05:21 +0400 | [diff] [blame] | 1322 | }; |