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> |
| 30 | #include <linux/quotaops.h> |
| 31 | #include <linux/smp_lock.h> |
| 32 | #include <linux/buffer_head.h> |
Alexey Dobriyan | e8edc6e | 2007-05-21 01:22:52 +0400 | [diff] [blame] | 33 | #include <linux/sched.h> |
Bob Copeland | f845fce | 2008-04-17 09:47:48 +0200 | [diff] [blame] | 34 | #include <linux/crc-itu-t.h> |
Rasmus Rohde | 221e583 | 2008-04-30 17:22:06 +0200 | [diff] [blame] | 35 | #include <linux/exportfs.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | |
Al Viro | 391e8bb | 2010-01-31 21:28:48 -0500 | [diff] [blame] | 37 | static inline int udf_match(int len1, const unsigned char *name1, int len2, |
| 38 | const unsigned char *name2) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | { |
| 40 | if (len1 != len2) |
| 41 | return 0; |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 42 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | return !memcmp(name1, name2, len1); |
| 44 | } |
| 45 | |
| 46 | int udf_write_fi(struct inode *inode, struct fileIdentDesc *cfi, |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 47 | struct fileIdentDesc *sfi, struct udf_fileident_bh *fibh, |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 48 | uint8_t *impuse, uint8_t *fileident) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | { |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 50 | uint16_t crclen = fibh->eoffset - fibh->soffset - sizeof(struct tag); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | uint16_t crc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | int offset; |
| 53 | uint16_t liu = le16_to_cpu(cfi->lengthOfImpUse); |
| 54 | uint8_t lfi = cfi->lengthFileIdent; |
| 55 | int padlen = fibh->eoffset - fibh->soffset - liu - lfi - |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 56 | sizeof(struct fileIdentDesc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | int adinicb = 0; |
| 58 | |
Marcin Slusarz | c0b3443 | 2008-02-08 04:20:42 -0800 | [diff] [blame] | 59 | if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | adinicb = 1; |
| 61 | |
| 62 | offset = fibh->soffset + sizeof(struct fileIdentDesc); |
| 63 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 64 | if (impuse) { |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 65 | if (adinicb || (offset + liu < 0)) { |
| 66 | memcpy((uint8_t *)sfi->impUse, impuse, liu); |
| 67 | } else if (offset >= 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | memcpy(fibh->ebh->b_data + offset, impuse, liu); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 69 | } else { |
| 70 | memcpy((uint8_t *)sfi->impUse, impuse, -offset); |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 71 | memcpy(fibh->ebh->b_data, impuse - offset, |
| 72 | liu + offset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | } |
| 74 | } |
| 75 | |
| 76 | offset += liu; |
| 77 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 78 | if (fileident) { |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 79 | if (adinicb || (offset + lfi < 0)) { |
| 80 | memcpy((uint8_t *)sfi->fileIdent + liu, fileident, lfi); |
| 81 | } else if (offset >= 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | memcpy(fibh->ebh->b_data + offset, fileident, lfi); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 83 | } else { |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 84 | memcpy((uint8_t *)sfi->fileIdent + liu, fileident, |
| 85 | -offset); |
| 86 | memcpy(fibh->ebh->b_data, fileident - offset, |
| 87 | lfi + offset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | } |
| 89 | } |
| 90 | |
| 91 | offset += lfi; |
| 92 | |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 93 | if (adinicb || (offset + padlen < 0)) { |
| 94 | memset((uint8_t *)sfi->padding + liu + lfi, 0x00, padlen); |
| 95 | } else if (offset >= 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | memset(fibh->ebh->b_data + offset, 0x00, padlen); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 97 | } else { |
| 98 | memset((uint8_t *)sfi->padding + liu + lfi, 0x00, -offset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 99 | memset(fibh->ebh->b_data, 0x00, padlen + offset); |
| 100 | } |
| 101 | |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 102 | crc = crc_itu_t(0, (uint8_t *)cfi + sizeof(struct tag), |
| 103 | sizeof(struct fileIdentDesc) - sizeof(struct tag)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 104 | |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 105 | if (fibh->sbh == fibh->ebh) { |
Bob Copeland | f845fce | 2008-04-17 09:47:48 +0200 | [diff] [blame] | 106 | crc = crc_itu_t(crc, (uint8_t *)sfi->impUse, |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 107 | crclen + sizeof(struct tag) - |
Bob Copeland | f845fce | 2008-04-17 09:47:48 +0200 | [diff] [blame] | 108 | sizeof(struct fileIdentDesc)); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 109 | } else if (sizeof(struct fileIdentDesc) >= -fibh->soffset) { |
Bob Copeland | f845fce | 2008-04-17 09:47:48 +0200 | [diff] [blame] | 110 | crc = crc_itu_t(crc, fibh->ebh->b_data + |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 111 | sizeof(struct fileIdentDesc) + |
| 112 | fibh->soffset, |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 113 | crclen + sizeof(struct tag) - |
Bob Copeland | f845fce | 2008-04-17 09:47:48 +0200 | [diff] [blame] | 114 | sizeof(struct fileIdentDesc)); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 115 | } else { |
Bob Copeland | f845fce | 2008-04-17 09:47:48 +0200 | [diff] [blame] | 116 | crc = crc_itu_t(crc, (uint8_t *)sfi->impUse, |
| 117 | -fibh->soffset - sizeof(struct fileIdentDesc)); |
| 118 | crc = crc_itu_t(crc, fibh->ebh->b_data, fibh->eoffset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 119 | } |
| 120 | |
| 121 | cfi->descTag.descCRC = cpu_to_le16(crc); |
| 122 | cfi->descTag.descCRCLength = cpu_to_le16(crclen); |
Marcin Slusarz | 3f2587b | 2008-02-08 04:20:39 -0800 | [diff] [blame] | 123 | cfi->descTag.tagChecksum = udf_tag_checksum(&cfi->descTag); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 125 | if (adinicb || (sizeof(struct fileIdentDesc) <= -fibh->soffset)) { |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 126 | memcpy((uint8_t *)sfi, (uint8_t *)cfi, |
| 127 | sizeof(struct fileIdentDesc)); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 128 | } else { |
| 129 | memcpy((uint8_t *)sfi, (uint8_t *)cfi, -fibh->soffset); |
| 130 | memcpy(fibh->ebh->b_data, (uint8_t *)cfi - fibh->soffset, |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 131 | sizeof(struct fileIdentDesc) + fibh->soffset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | } |
| 133 | |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 134 | if (adinicb) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 135 | mark_inode_dirty(inode); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 136 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 137 | if (fibh->sbh != fibh->ebh) |
| 138 | mark_buffer_dirty_inode(fibh->ebh, inode); |
| 139 | mark_buffer_dirty_inode(fibh->sbh, inode); |
| 140 | } |
| 141 | return 0; |
| 142 | } |
| 143 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 144 | static struct fileIdentDesc *udf_find_entry(struct inode *dir, |
Al Viro | 391e8bb | 2010-01-31 21:28:48 -0500 | [diff] [blame] | 145 | const struct qstr *child, |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 146 | struct udf_fileident_bh *fibh, |
| 147 | struct fileIdentDesc *cfi) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | { |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 149 | struct fileIdentDesc *fi = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 150 | loff_t f_pos; |
| 151 | int block, flen; |
Al Viro | 391e8bb | 2010-01-31 21:28:48 -0500 | [diff] [blame] | 152 | unsigned char *fname = NULL; |
| 153 | unsigned char *nameptr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 154 | uint8_t lfi; |
| 155 | uint16_t liu; |
KAMBAROV, ZAUR | ec471dc | 2005-06-28 20:45:10 -0700 | [diff] [blame] | 156 | loff_t size; |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 157 | struct kernel_lb_addr eloc; |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 158 | uint32_t elen; |
Jan Kara | 60448b1 | 2007-05-08 00:35:13 -0700 | [diff] [blame] | 159 | sector_t offset; |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 160 | struct extent_position epos = {}; |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 161 | struct udf_inode_info *dinfo = UDF_I(dir); |
Al Viro | 9fbb76c | 2008-10-12 00:15:17 -0400 | [diff] [blame] | 162 | int isdotdot = child->len == 2 && |
| 163 | child->name[0] == '.' && child->name[1] == '.'; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | |
Jan Kara | af79329 | 2008-02-08 04:20:50 -0800 | [diff] [blame] | 165 | size = udf_ext0_offset(dir) + dir->i_size; |
| 166 | f_pos = udf_ext0_offset(dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 167 | |
Jan Kara | b80697c | 2008-03-04 14:14:05 +0100 | [diff] [blame] | 168 | fibh->sbh = fibh->ebh = NULL; |
Jan Kara | af79329 | 2008-02-08 04:20:50 -0800 | [diff] [blame] | 169 | fibh->soffset = fibh->eoffset = f_pos & (dir->i_sb->s_blocksize - 1); |
Jan Kara | b80697c | 2008-03-04 14:14:05 +0100 | [diff] [blame] | 170 | if (dinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { |
| 171 | if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits, &epos, |
| 172 | &eloc, &elen, &offset) != (EXT_RECORDED_ALLOCATED >> 30)) |
| 173 | goto out_err; |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 174 | block = udf_get_lb_pblock(dir->i_sb, &eloc, offset); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 175 | if ((++offset << dir->i_sb->s_blocksize_bits) < elen) { |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 176 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 177 | epos.offset -= sizeof(struct short_ad); |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 178 | else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 179 | epos.offset -= sizeof(struct long_ad); |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 180 | } else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 181 | offset = 0; |
| 182 | |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 183 | fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block); |
Jan Kara | b80697c | 2008-03-04 14:14:05 +0100 | [diff] [blame] | 184 | if (!fibh->sbh) |
| 185 | goto out_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | } |
| 187 | |
Jan Kara | b80697c | 2008-03-04 14:14:05 +0100 | [diff] [blame] | 188 | fname = kmalloc(UDF_NAME_LEN, GFP_NOFS); |
| 189 | if (!fname) |
| 190 | goto out_err; |
| 191 | |
Jan Kara | af79329 | 2008-02-08 04:20:50 -0800 | [diff] [blame] | 192 | while (f_pos < size) { |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 193 | fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc, |
| 194 | &elen, &offset); |
Jan Kara | b80697c | 2008-03-04 14:14:05 +0100 | [diff] [blame] | 195 | if (!fi) |
| 196 | goto out_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 197 | |
| 198 | liu = le16_to_cpu(cfi->lengthOfImpUse); |
| 199 | lfi = cfi->lengthFileIdent; |
| 200 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 201 | if (fibh->sbh == fibh->ebh) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 202 | nameptr = fi->fileIdent + liu; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 203 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 204 | int poffset; /* Unpaded ending offset */ |
| 205 | |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 206 | poffset = fibh->soffset + sizeof(struct fileIdentDesc) + |
| 207 | liu + lfi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 208 | |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 209 | if (poffset >= lfi) |
| 210 | nameptr = (uint8_t *)(fibh->ebh->b_data + |
| 211 | poffset - lfi); |
| 212 | else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 213 | nameptr = fname; |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 214 | memcpy(nameptr, fi->fileIdent + liu, |
| 215 | lfi - poffset); |
| 216 | memcpy(nameptr + lfi - poffset, |
| 217 | fibh->ebh->b_data, poffset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 218 | } |
| 219 | } |
| 220 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 221 | if ((cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) { |
| 222 | if (!UDF_QUERY_FLAG(dir->i_sb, UDF_FLAG_UNDELETE)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 223 | continue; |
| 224 | } |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 225 | |
| 226 | if ((cfi->fileCharacteristics & FID_FILE_CHAR_HIDDEN) != 0) { |
| 227 | if (!UDF_QUERY_FLAG(dir->i_sb, UDF_FLAG_UNHIDE)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 228 | continue; |
| 229 | } |
| 230 | |
Rasmus Rohde | 221e583 | 2008-04-30 17:22:06 +0200 | [diff] [blame] | 231 | if ((cfi->fileCharacteristics & FID_FILE_CHAR_PARENT) && |
| 232 | isdotdot) { |
| 233 | brelse(epos.bh); |
| 234 | return fi; |
| 235 | } |
| 236 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 237 | if (!lfi) |
| 238 | continue; |
| 239 | |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 240 | flen = udf_get_filename(dir->i_sb, nameptr, fname, lfi); |
Al Viro | 9fbb76c | 2008-10-12 00:15:17 -0400 | [diff] [blame] | 241 | if (flen && udf_match(flen, fname, child->len, child->name)) |
Jan Kara | b80697c | 2008-03-04 14:14:05 +0100 | [diff] [blame] | 242 | goto out_ok; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | } |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 244 | |
Jan Kara | b80697c | 2008-03-04 14:14:05 +0100 | [diff] [blame] | 245 | out_err: |
| 246 | fi = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 247 | if (fibh->sbh != fibh->ebh) |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 248 | brelse(fibh->ebh); |
| 249 | brelse(fibh->sbh); |
Jan Kara | b80697c | 2008-03-04 14:14:05 +0100 | [diff] [blame] | 250 | out_ok: |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 251 | brelse(epos.bh); |
Jan Kara | b80697c | 2008-03-04 14:14:05 +0100 | [diff] [blame] | 252 | kfree(fname); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 253 | |
Jan Kara | b80697c | 2008-03-04 14:14:05 +0100 | [diff] [blame] | 254 | return fi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 255 | } |
| 256 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 257 | static struct dentry *udf_lookup(struct inode *dir, struct dentry *dentry, |
| 258 | struct nameidata *nd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 259 | { |
| 260 | struct inode *inode = NULL; |
Jayachandran C | db9a369 | 2006-02-03 03:04:50 -0800 | [diff] [blame] | 261 | struct fileIdentDesc cfi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 262 | struct udf_fileident_bh fibh; |
| 263 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 264 | if (dentry->d_name.len > UDF_NAME_LEN - 2) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 265 | return ERR_PTR(-ENAMETOOLONG); |
| 266 | |
| 267 | lock_kernel(); |
| 268 | #ifdef UDF_RECOVERY |
| 269 | /* temporary shorthand for specifying files by inode number */ |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 270 | if (!strncmp(dentry->d_name.name, ".B=", 3)) { |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 271 | struct kernel_lb_addr lb = { |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 272 | .logicalBlockNum = 0, |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 273 | .partitionReferenceNum = |
| 274 | simple_strtoul(dentry->d_name.name + 3, |
| 275 | NULL, 0), |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 276 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | inode = udf_iget(dir->i_sb, lb); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 278 | if (!inode) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 279 | unlock_kernel(); |
| 280 | return ERR_PTR(-EACCES); |
| 281 | } |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 282 | } else |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 283 | #endif /* UDF_RECOVERY */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 284 | |
Al Viro | 9fbb76c | 2008-10-12 00:15:17 -0400 | [diff] [blame] | 285 | if (udf_find_entry(dir, &dentry->d_name, &fibh, &cfi)) { |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 286 | struct kernel_lb_addr loc; |
| 287 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 288 | if (fibh.sbh != fibh.ebh) |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 289 | brelse(fibh.ebh); |
| 290 | brelse(fibh.sbh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 291 | |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 292 | loc = lelb_to_cpu(cfi.icb.extLocation); |
| 293 | inode = udf_iget(dir->i_sb, &loc); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 294 | if (!inode) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 295 | unlock_kernel(); |
| 296 | return ERR_PTR(-EACCES); |
| 297 | } |
| 298 | } |
| 299 | unlock_kernel(); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 300 | |
Rasmus Rohde | 221e583 | 2008-04-30 17:22:06 +0200 | [diff] [blame] | 301 | return d_splice_alias(inode, dentry); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 302 | } |
| 303 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 304 | static struct fileIdentDesc *udf_add_entry(struct inode *dir, |
| 305 | struct dentry *dentry, |
| 306 | struct udf_fileident_bh *fibh, |
| 307 | struct fileIdentDesc *cfi, int *err) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 308 | { |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 309 | struct super_block *sb = dir->i_sb; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 310 | struct fileIdentDesc *fi = NULL; |
Al Viro | 391e8bb | 2010-01-31 21:28:48 -0500 | [diff] [blame] | 311 | unsigned char *name = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 312 | int namelen; |
| 313 | loff_t f_pos; |
Jan Kara | af79329 | 2008-02-08 04:20:50 -0800 | [diff] [blame] | 314 | loff_t size = udf_ext0_offset(dir) + dir->i_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | int nfidlen; |
| 316 | uint8_t lfi; |
| 317 | uint16_t liu; |
| 318 | int block; |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 319 | struct kernel_lb_addr eloc; |
Jan Kara | 9afadc4 | 2008-05-06 18:26:17 +0200 | [diff] [blame] | 320 | uint32_t elen = 0; |
Jan Kara | 60448b1 | 2007-05-08 00:35:13 -0700 | [diff] [blame] | 321 | sector_t offset; |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 322 | struct extent_position epos = {}; |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 323 | struct udf_inode_info *dinfo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 324 | |
Jan Kara | b80697c | 2008-03-04 14:14:05 +0100 | [diff] [blame] | 325 | fibh->sbh = fibh->ebh = NULL; |
| 326 | name = kmalloc(UDF_NAME_LEN, GFP_NOFS); |
| 327 | if (!name) { |
| 328 | *err = -ENOMEM; |
| 329 | goto out_err; |
| 330 | } |
| 331 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 332 | if (dentry) { |
| 333 | if (!dentry->d_name.len) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 334 | *err = -EINVAL; |
Jan Kara | b80697c | 2008-03-04 14:14:05 +0100 | [diff] [blame] | 335 | goto out_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 336 | } |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 337 | namelen = udf_put_filename(sb, dentry->d_name.name, name, |
| 338 | dentry->d_name.len); |
| 339 | if (!namelen) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 340 | *err = -ENAMETOOLONG; |
Jan Kara | b80697c | 2008-03-04 14:14:05 +0100 | [diff] [blame] | 341 | goto out_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 342 | } |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 343 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 344 | namelen = 0; |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 345 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 346 | |
| 347 | nfidlen = (sizeof(struct fileIdentDesc) + namelen + 3) & ~3; |
| 348 | |
Jan Kara | af79329 | 2008-02-08 04:20:50 -0800 | [diff] [blame] | 349 | f_pos = udf_ext0_offset(dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 350 | |
Jan Kara | af79329 | 2008-02-08 04:20:50 -0800 | [diff] [blame] | 351 | fibh->soffset = fibh->eoffset = f_pos & (dir->i_sb->s_blocksize - 1); |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 352 | dinfo = UDF_I(dir); |
Jan Kara | b80697c | 2008-03-04 14:14:05 +0100 | [diff] [blame] | 353 | if (dinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { |
| 354 | if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits, &epos, |
| 355 | &eloc, &elen, &offset) != (EXT_RECORDED_ALLOCATED >> 30)) { |
| 356 | block = udf_get_lb_pblock(dir->i_sb, |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 357 | &dinfo->i_location, 0); |
Jan Kara | b80697c | 2008-03-04 14:14:05 +0100 | [diff] [blame] | 358 | fibh->soffset = fibh->eoffset = sb->s_blocksize; |
| 359 | goto add; |
| 360 | } |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 361 | block = udf_get_lb_pblock(dir->i_sb, &eloc, offset); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 362 | if ((++offset << dir->i_sb->s_blocksize_bits) < elen) { |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 363 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 364 | epos.offset -= sizeof(struct short_ad); |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 365 | else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 366 | epos.offset -= sizeof(struct long_ad); |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 367 | } else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 368 | offset = 0; |
| 369 | |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 370 | fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block); |
| 371 | if (!fibh->sbh) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 372 | *err = -EIO; |
Jan Kara | b80697c | 2008-03-04 14:14:05 +0100 | [diff] [blame] | 373 | goto out_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 374 | } |
| 375 | |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 376 | block = dinfo->i_location.logicalBlockNum; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 377 | } |
| 378 | |
Jan Kara | af79329 | 2008-02-08 04:20:50 -0800 | [diff] [blame] | 379 | while (f_pos < size) { |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 380 | fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc, |
| 381 | &elen, &offset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 382 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 383 | if (!fi) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 384 | *err = -EIO; |
Jan Kara | b80697c | 2008-03-04 14:14:05 +0100 | [diff] [blame] | 385 | goto out_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 386 | } |
| 387 | |
| 388 | liu = le16_to_cpu(cfi->lengthOfImpUse); |
| 389 | lfi = cfi->lengthFileIdent; |
| 390 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 391 | if ((cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) { |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 392 | if (((sizeof(struct fileIdentDesc) + |
| 393 | liu + lfi + 3) & ~3) == nfidlen) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | cfi->descTag.tagSerialNum = cpu_to_le16(1); |
| 395 | cfi->fileVersionNum = cpu_to_le16(1); |
| 396 | cfi->fileCharacteristics = 0; |
| 397 | cfi->lengthFileIdent = namelen; |
| 398 | cfi->lengthOfImpUse = cpu_to_le16(0); |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 399 | if (!udf_write_fi(dir, cfi, fi, fibh, NULL, |
| 400 | name)) |
Jan Kara | b80697c | 2008-03-04 14:14:05 +0100 | [diff] [blame] | 401 | goto out_ok; |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 402 | else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 403 | *err = -EIO; |
Jan Kara | b80697c | 2008-03-04 14:14:05 +0100 | [diff] [blame] | 404 | goto out_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | } |
| 406 | } |
| 407 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 408 | } |
| 409 | |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 410 | add: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 411 | f_pos += nfidlen; |
| 412 | |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 413 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB && |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 414 | sb->s_blocksize - fibh->eoffset < nfidlen) { |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 415 | brelse(epos.bh); |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 416 | epos.bh = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 417 | fibh->soffset -= udf_ext0_offset(dir); |
| 418 | fibh->eoffset -= udf_ext0_offset(dir); |
Jan Kara | af79329 | 2008-02-08 04:20:50 -0800 | [diff] [blame] | 419 | f_pos -= udf_ext0_offset(dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 420 | if (fibh->sbh != fibh->ebh) |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 421 | brelse(fibh->ebh); |
| 422 | brelse(fibh->sbh); |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 423 | fibh->sbh = fibh->ebh = |
| 424 | udf_expand_dir_adinicb(dir, &block, err); |
| 425 | if (!fibh->sbh) |
Jan Kara | b80697c | 2008-03-04 14:14:05 +0100 | [diff] [blame] | 426 | goto out_err; |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 427 | epos.block = dinfo->i_location; |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 428 | epos.offset = udf_file_entry_alloc_offset(dir); |
Jan Kara | 05343c4 | 2008-02-08 04:20:51 -0800 | [diff] [blame] | 429 | /* Load extent udf_expand_dir_adinicb() has created */ |
| 430 | udf_current_aext(dir, &epos, &eloc, &elen, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 431 | } |
| 432 | |
Jan Kara | 2c948b3 | 2009-12-03 13:39:28 +0100 | [diff] [blame] | 433 | /* Entry fits into current block? */ |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 434 | if (sb->s_blocksize - fibh->eoffset >= nfidlen) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 435 | fibh->soffset = fibh->eoffset; |
| 436 | fibh->eoffset += nfidlen; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 437 | if (fibh->sbh != fibh->ebh) { |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 438 | brelse(fibh->sbh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 439 | fibh->sbh = fibh->ebh; |
| 440 | } |
| 441 | |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 442 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { |
| 443 | block = dinfo->i_location.logicalBlockNum; |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 444 | fi = (struct fileIdentDesc *) |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 445 | (dinfo->i_ext.i_data + |
Marcin Slusarz | c0b3443 | 2008-02-08 04:20:42 -0800 | [diff] [blame] | 446 | fibh->soffset - |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 447 | udf_ext0_offset(dir) + |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 448 | dinfo->i_lenEAttr); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 449 | } else { |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 450 | block = eloc.logicalBlockNum + |
| 451 | ((elen - 1) >> |
| 452 | dir->i_sb->s_blocksize_bits); |
| 453 | fi = (struct fileIdentDesc *) |
| 454 | (fibh->sbh->b_data + fibh->soffset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 455 | } |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 456 | } else { |
Jan Kara | 2c948b3 | 2009-12-03 13:39:28 +0100 | [diff] [blame] | 457 | /* Round up last extent in the file */ |
| 458 | elen = (elen + sb->s_blocksize - 1) & ~(sb->s_blocksize - 1); |
| 459 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
| 460 | epos.offset -= sizeof(struct short_ad); |
| 461 | else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
| 462 | epos.offset -= sizeof(struct long_ad); |
| 463 | udf_write_aext(dir, &epos, &eloc, elen, 1); |
| 464 | dinfo->i_lenExtents = (dinfo->i_lenExtents + sb->s_blocksize |
| 465 | - 1) & ~(sb->s_blocksize - 1); |
| 466 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 467 | fibh->soffset = fibh->eoffset - sb->s_blocksize; |
| 468 | fibh->eoffset += nfidlen - sb->s_blocksize; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 469 | if (fibh->sbh != fibh->ebh) { |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 470 | brelse(fibh->sbh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 471 | fibh->sbh = fibh->ebh; |
| 472 | } |
| 473 | |
| 474 | block = eloc.logicalBlockNum + ((elen - 1) >> |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 475 | dir->i_sb->s_blocksize_bits); |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 476 | fibh->ebh = udf_bread(dir, |
Jan Kara | af79329 | 2008-02-08 04:20:50 -0800 | [diff] [blame] | 477 | f_pos >> dir->i_sb->s_blocksize_bits, 1, err); |
Jan Kara | b80697c | 2008-03-04 14:14:05 +0100 | [diff] [blame] | 478 | if (!fibh->ebh) |
| 479 | goto out_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 480 | |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 481 | if (!fibh->soffset) { |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 482 | if (udf_next_aext(dir, &epos, &eloc, &elen, 1) == |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 483 | (EXT_RECORDED_ALLOCATED >> 30)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 484 | block = eloc.logicalBlockNum + ((elen - 1) >> |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 485 | dir->i_sb->s_blocksize_bits); |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 486 | } else |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 487 | block++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 488 | |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 489 | brelse(fibh->sbh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 490 | fibh->sbh = fibh->ebh; |
| 491 | fi = (struct fileIdentDesc *)(fibh->sbh->b_data); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 492 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 493 | fi = (struct fileIdentDesc *) |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 494 | (fibh->sbh->b_data + sb->s_blocksize + |
| 495 | fibh->soffset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 496 | } |
| 497 | } |
| 498 | |
| 499 | memset(cfi, 0, sizeof(struct fileIdentDesc)); |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 500 | if (UDF_SB(sb)->s_udfrev >= 0x0200) |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 501 | udf_new_tag((char *)cfi, TAG_IDENT_FID, 3, 1, block, |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 502 | sizeof(struct tag)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 503 | else |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 504 | udf_new_tag((char *)cfi, TAG_IDENT_FID, 2, 1, block, |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 505 | sizeof(struct tag)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 506 | cfi->fileVersionNum = cpu_to_le16(1); |
| 507 | cfi->lengthFileIdent = namelen; |
| 508 | cfi->lengthOfImpUse = cpu_to_le16(0); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 509 | if (!udf_write_fi(dir, cfi, fi, fibh, NULL, name)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 510 | dir->i_size += nfidlen; |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 511 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
| 512 | dinfo->i_lenAlloc += nfidlen; |
Jan Kara | 2c948b3 | 2009-12-03 13:39:28 +0100 | [diff] [blame] | 513 | else { |
| 514 | /* Find the last extent and truncate it to proper size */ |
| 515 | while (udf_next_aext(dir, &epos, &eloc, &elen, 1) == |
| 516 | (EXT_RECORDED_ALLOCATED >> 30)) |
| 517 | ; |
| 518 | elen -= dinfo->i_lenExtents - dir->i_size; |
| 519 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
| 520 | epos.offset -= sizeof(struct short_ad); |
| 521 | else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
| 522 | epos.offset -= sizeof(struct long_ad); |
| 523 | udf_write_aext(dir, &epos, &eloc, elen, 1); |
| 524 | dinfo->i_lenExtents = dir->i_size; |
| 525 | } |
| 526 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 527 | mark_inode_dirty(dir); |
Jan Kara | b80697c | 2008-03-04 14:14:05 +0100 | [diff] [blame] | 528 | goto out_ok; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 529 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 530 | *err = -EIO; |
Jan Kara | b80697c | 2008-03-04 14:14:05 +0100 | [diff] [blame] | 531 | goto out_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 532 | } |
Jan Kara | b80697c | 2008-03-04 14:14:05 +0100 | [diff] [blame] | 533 | |
| 534 | out_err: |
| 535 | fi = NULL; |
| 536 | if (fibh->sbh != fibh->ebh) |
| 537 | brelse(fibh->ebh); |
| 538 | brelse(fibh->sbh); |
| 539 | out_ok: |
| 540 | brelse(epos.bh); |
| 541 | kfree(name); |
| 542 | return fi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 543 | } |
| 544 | |
| 545 | static int udf_delete_entry(struct inode *inode, struct fileIdentDesc *fi, |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 546 | struct udf_fileident_bh *fibh, |
| 547 | struct fileIdentDesc *cfi) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 548 | { |
| 549 | cfi->fileCharacteristics |= FID_FILE_CHAR_DELETED; |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 550 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 551 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT)) |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 552 | memset(&(cfi->icb), 0x00, sizeof(struct long_ad)); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 553 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 554 | return udf_write_fi(inode, cfi, fi, fibh, NULL, NULL); |
| 555 | } |
| 556 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 557 | static int udf_create(struct inode *dir, struct dentry *dentry, int mode, |
| 558 | struct nameidata *nd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 559 | { |
| 560 | struct udf_fileident_bh fibh; |
| 561 | struct inode *inode; |
| 562 | struct fileIdentDesc cfi, *fi; |
| 563 | int err; |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 564 | struct udf_inode_info *iinfo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 565 | |
Christoph Hellwig | 871a293 | 2010-03-03 09:05:07 -0500 | [diff] [blame] | 566 | dquot_initialize(dir); |
Christoph Hellwig | 907f455 | 2010-03-03 09:05:06 -0500 | [diff] [blame] | 567 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 568 | lock_kernel(); |
| 569 | inode = udf_new_inode(dir, mode, &err); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 570 | if (!inode) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 571 | unlock_kernel(); |
| 572 | return err; |
| 573 | } |
| 574 | |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 575 | iinfo = UDF_I(inode); |
| 576 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 577 | inode->i_data.a_ops = &udf_adinicb_aops; |
| 578 | else |
| 579 | inode->i_data.a_ops = &udf_aops; |
| 580 | inode->i_op = &udf_file_inode_operations; |
| 581 | inode->i_fop = &udf_file_operations; |
| 582 | inode->i_mode = mode; |
| 583 | mark_inode_dirty(inode); |
| 584 | |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 585 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
| 586 | if (!fi) { |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 587 | inode->i_nlink--; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 588 | mark_inode_dirty(inode); |
| 589 | iput(inode); |
| 590 | unlock_kernel(); |
| 591 | return err; |
| 592 | } |
| 593 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 594 | cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 595 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 596 | cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 597 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); |
Marcin Slusarz | c0b3443 | 2008-02-08 04:20:42 -0800 | [diff] [blame] | 598 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 599 | mark_inode_dirty(dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 600 | if (fibh.sbh != fibh.ebh) |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 601 | brelse(fibh.ebh); |
| 602 | brelse(fibh.sbh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 603 | unlock_kernel(); |
| 604 | d_instantiate(dentry, inode); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 605 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 606 | return 0; |
| 607 | } |
| 608 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 609 | static int udf_mknod(struct inode *dir, struct dentry *dentry, int mode, |
| 610 | dev_t rdev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 611 | { |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 612 | struct inode *inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 613 | struct udf_fileident_bh fibh; |
| 614 | struct fileIdentDesc cfi, *fi; |
| 615 | int err; |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 616 | struct udf_inode_info *iinfo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 617 | |
| 618 | if (!old_valid_dev(rdev)) |
| 619 | return -EINVAL; |
| 620 | |
Christoph Hellwig | 871a293 | 2010-03-03 09:05:07 -0500 | [diff] [blame] | 621 | dquot_initialize(dir); |
Christoph Hellwig | 907f455 | 2010-03-03 09:05:06 -0500 | [diff] [blame] | 622 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 623 | lock_kernel(); |
| 624 | err = -EIO; |
| 625 | inode = udf_new_inode(dir, mode, &err); |
| 626 | if (!inode) |
| 627 | goto out; |
| 628 | |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 629 | iinfo = UDF_I(inode); |
David Howells | 7706bb3 | 2008-11-14 10:39:03 +1100 | [diff] [blame] | 630 | inode->i_uid = current_fsuid(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 631 | init_special_inode(inode, mode, rdev); |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 632 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
| 633 | if (!fi) { |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 634 | inode->i_nlink--; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 635 | mark_inode_dirty(inode); |
| 636 | iput(inode); |
| 637 | unlock_kernel(); |
| 638 | return err; |
| 639 | } |
| 640 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 641 | cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 642 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 643 | cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 644 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); |
Marcin Slusarz | c0b3443 | 2008-02-08 04:20:42 -0800 | [diff] [blame] | 645 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 646 | mark_inode_dirty(dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 647 | mark_inode_dirty(inode); |
| 648 | |
| 649 | if (fibh.sbh != fibh.ebh) |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 650 | brelse(fibh.ebh); |
| 651 | brelse(fibh.sbh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 652 | d_instantiate(dentry, inode); |
| 653 | err = 0; |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 654 | |
| 655 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 656 | unlock_kernel(); |
| 657 | return err; |
| 658 | } |
| 659 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 660 | static int udf_mkdir(struct inode *dir, struct dentry *dentry, int mode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 661 | { |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 662 | struct inode *inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 663 | struct udf_fileident_bh fibh; |
| 664 | struct fileIdentDesc cfi, *fi; |
| 665 | int err; |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 666 | struct udf_inode_info *dinfo = UDF_I(dir); |
| 667 | struct udf_inode_info *iinfo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 668 | |
Christoph Hellwig | 871a293 | 2010-03-03 09:05:07 -0500 | [diff] [blame] | 669 | dquot_initialize(dir); |
Christoph Hellwig | 907f455 | 2010-03-03 09:05:06 -0500 | [diff] [blame] | 670 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 671 | lock_kernel(); |
| 672 | err = -EMLINK; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 673 | if (dir->i_nlink >= (256 << sizeof(dir->i_nlink)) - 1) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 674 | goto out; |
| 675 | |
| 676 | err = -EIO; |
| 677 | inode = udf_new_inode(dir, S_IFDIR, &err); |
| 678 | if (!inode) |
| 679 | goto out; |
| 680 | |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 681 | iinfo = UDF_I(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 682 | inode->i_op = &udf_dir_inode_operations; |
| 683 | inode->i_fop = &udf_dir_operations; |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 684 | fi = udf_add_entry(inode, NULL, &fibh, &cfi, &err); |
| 685 | if (!fi) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 686 | inode->i_nlink--; |
| 687 | mark_inode_dirty(inode); |
| 688 | iput(inode); |
| 689 | goto out; |
| 690 | } |
| 691 | inode->i_nlink = 2; |
| 692 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 693 | cfi.icb.extLocation = cpu_to_lelb(dinfo->i_location); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 694 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 695 | cpu_to_le32(dinfo->i_unique & 0x00000000FFFFFFFFUL); |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 696 | cfi.fileCharacteristics = |
| 697 | FID_FILE_CHAR_DIRECTORY | FID_FILE_CHAR_PARENT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 698 | udf_write_fi(inode, &cfi, fi, &fibh, NULL, NULL); |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 699 | brelse(fibh.sbh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 700 | inode->i_mode = S_IFDIR | mode; |
| 701 | if (dir->i_mode & S_ISGID) |
| 702 | inode->i_mode |= S_ISGID; |
| 703 | mark_inode_dirty(inode); |
| 704 | |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 705 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
| 706 | if (!fi) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 707 | inode->i_nlink = 0; |
| 708 | mark_inode_dirty(inode); |
| 709 | iput(inode); |
| 710 | goto out; |
| 711 | } |
| 712 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 713 | cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 714 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 715 | cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 716 | cfi.fileCharacteristics |= FID_FILE_CHAR_DIRECTORY; |
| 717 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); |
Dave Hansen | d8c76e6 | 2006-09-30 23:29:04 -0700 | [diff] [blame] | 718 | inc_nlink(dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 719 | mark_inode_dirty(dir); |
| 720 | d_instantiate(dentry, inode); |
| 721 | if (fibh.sbh != fibh.ebh) |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 722 | brelse(fibh.ebh); |
| 723 | brelse(fibh.sbh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 724 | err = 0; |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 725 | |
| 726 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 727 | unlock_kernel(); |
| 728 | return err; |
| 729 | } |
| 730 | |
| 731 | static int empty_dir(struct inode *dir) |
| 732 | { |
| 733 | struct fileIdentDesc *fi, cfi; |
| 734 | struct udf_fileident_bh fibh; |
| 735 | loff_t f_pos; |
Jan Kara | af79329 | 2008-02-08 04:20:50 -0800 | [diff] [blame] | 736 | loff_t size = udf_ext0_offset(dir) + dir->i_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 737 | int block; |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 738 | struct kernel_lb_addr eloc; |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 739 | uint32_t elen; |
Jan Kara | 60448b1 | 2007-05-08 00:35:13 -0700 | [diff] [blame] | 740 | sector_t offset; |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 741 | struct extent_position epos = {}; |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 742 | struct udf_inode_info *dinfo = UDF_I(dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 743 | |
Jan Kara | af79329 | 2008-02-08 04:20:50 -0800 | [diff] [blame] | 744 | f_pos = udf_ext0_offset(dir); |
| 745 | fibh.soffset = fibh.eoffset = f_pos & (dir->i_sb->s_blocksize - 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 746 | |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 747 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 748 | fibh.sbh = fibh.ebh = NULL; |
Jan Kara | af79329 | 2008-02-08 04:20:50 -0800 | [diff] [blame] | 749 | 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] | 750 | &epos, &eloc, &elen, &offset) == |
| 751 | (EXT_RECORDED_ALLOCATED >> 30)) { |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 752 | block = udf_get_lb_pblock(dir->i_sb, &eloc, offset); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 753 | if ((++offset << dir->i_sb->s_blocksize_bits) < elen) { |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 754 | if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 755 | epos.offset -= sizeof(struct short_ad); |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 756 | else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 757 | epos.offset -= sizeof(struct long_ad); |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 758 | } else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 759 | offset = 0; |
| 760 | |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 761 | fibh.sbh = fibh.ebh = udf_tread(dir->i_sb, block); |
| 762 | if (!fibh.sbh) { |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 763 | brelse(epos.bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 764 | return 0; |
| 765 | } |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 766 | } else { |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 767 | brelse(epos.bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 768 | return 0; |
| 769 | } |
| 770 | |
Jan Kara | af79329 | 2008-02-08 04:20:50 -0800 | [diff] [blame] | 771 | while (f_pos < size) { |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 772 | fi = udf_fileident_read(dir, &f_pos, &fibh, &cfi, &epos, &eloc, |
| 773 | &elen, &offset); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 774 | if (!fi) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 775 | if (fibh.sbh != fibh.ebh) |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 776 | brelse(fibh.ebh); |
| 777 | brelse(fibh.sbh); |
| 778 | brelse(epos.bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 779 | return 0; |
| 780 | } |
| 781 | |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 782 | if (cfi.lengthFileIdent && |
| 783 | (cfi.fileCharacteristics & FID_FILE_CHAR_DELETED) == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 784 | if (fibh.sbh != fibh.ebh) |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 785 | brelse(fibh.ebh); |
| 786 | brelse(fibh.sbh); |
| 787 | brelse(epos.bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 788 | return 0; |
| 789 | } |
| 790 | } |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 791 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 792 | if (fibh.sbh != fibh.ebh) |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 793 | brelse(fibh.ebh); |
| 794 | brelse(fibh.sbh); |
| 795 | brelse(epos.bh); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 796 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 797 | return 1; |
| 798 | } |
| 799 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 800 | static int udf_rmdir(struct inode *dir, struct dentry *dentry) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 801 | { |
| 802 | int retval; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 803 | struct inode *inode = dentry->d_inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 804 | struct udf_fileident_bh fibh; |
| 805 | struct fileIdentDesc *fi, cfi; |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 806 | struct kernel_lb_addr tloc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 807 | |
Christoph Hellwig | 871a293 | 2010-03-03 09:05:07 -0500 | [diff] [blame] | 808 | dquot_initialize(dir); |
Christoph Hellwig | 907f455 | 2010-03-03 09:05:06 -0500 | [diff] [blame] | 809 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 810 | retval = -ENOENT; |
| 811 | lock_kernel(); |
Al Viro | 9fbb76c | 2008-10-12 00:15:17 -0400 | [diff] [blame] | 812 | fi = udf_find_entry(dir, &dentry->d_name, &fibh, &cfi); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 813 | if (!fi) |
| 814 | goto out; |
| 815 | |
| 816 | retval = -EIO; |
| 817 | tloc = lelb_to_cpu(cfi.icb.extLocation); |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 818 | 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] | 819 | goto end_rmdir; |
| 820 | retval = -ENOTEMPTY; |
| 821 | if (!empty_dir(inode)) |
| 822 | goto end_rmdir; |
| 823 | retval = udf_delete_entry(dir, fi, &fibh, &cfi); |
| 824 | if (retval) |
| 825 | goto end_rmdir; |
| 826 | if (inode->i_nlink != 2) |
| 827 | udf_warning(inode->i_sb, "udf_rmdir", |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 828 | "empty directory has nlink != 2 (%d)", |
| 829 | inode->i_nlink); |
Dave Hansen | ce71ec3 | 2006-09-30 23:29:06 -0700 | [diff] [blame] | 830 | clear_nlink(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 831 | inode->i_size = 0; |
Stephen Mollett | c007c06 | 2007-05-08 00:31:31 -0700 | [diff] [blame] | 832 | inode_dec_link_count(dir); |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 833 | inode->i_ctime = dir->i_ctime = dir->i_mtime = |
| 834 | current_fs_time(dir->i_sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 835 | mark_inode_dirty(dir); |
| 836 | |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 837 | end_rmdir: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 838 | if (fibh.sbh != fibh.ebh) |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 839 | brelse(fibh.ebh); |
| 840 | brelse(fibh.sbh); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 841 | |
| 842 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 843 | unlock_kernel(); |
| 844 | return retval; |
| 845 | } |
| 846 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 847 | static int udf_unlink(struct inode *dir, struct dentry *dentry) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 848 | { |
| 849 | int retval; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 850 | struct inode *inode = dentry->d_inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 851 | struct udf_fileident_bh fibh; |
| 852 | struct fileIdentDesc *fi; |
| 853 | struct fileIdentDesc cfi; |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 854 | struct kernel_lb_addr tloc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 855 | |
Christoph Hellwig | 871a293 | 2010-03-03 09:05:07 -0500 | [diff] [blame] | 856 | dquot_initialize(dir); |
Christoph Hellwig | 907f455 | 2010-03-03 09:05:06 -0500 | [diff] [blame] | 857 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 858 | retval = -ENOENT; |
| 859 | lock_kernel(); |
Al Viro | 9fbb76c | 2008-10-12 00:15:17 -0400 | [diff] [blame] | 860 | fi = udf_find_entry(dir, &dentry->d_name, &fibh, &cfi); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 861 | if (!fi) |
| 862 | goto out; |
| 863 | |
| 864 | retval = -EIO; |
| 865 | tloc = lelb_to_cpu(cfi.icb.extLocation); |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 866 | 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] | 867 | goto end_unlink; |
| 868 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 869 | if (!inode->i_nlink) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 870 | udf_debug("Deleting nonexistent file (%lu), %d\n", |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 871 | inode->i_ino, inode->i_nlink); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 872 | inode->i_nlink = 1; |
| 873 | } |
| 874 | retval = udf_delete_entry(dir, fi, &fibh, &cfi); |
| 875 | if (retval) |
| 876 | goto end_unlink; |
| 877 | dir->i_ctime = dir->i_mtime = current_fs_time(dir->i_sb); |
| 878 | mark_inode_dirty(dir); |
Dave Hansen | 9a53c3a | 2006-09-30 23:29:03 -0700 | [diff] [blame] | 879 | inode_dec_link_count(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 880 | inode->i_ctime = dir->i_ctime; |
| 881 | retval = 0; |
| 882 | |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 883 | end_unlink: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 884 | if (fibh.sbh != fibh.ebh) |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 885 | brelse(fibh.ebh); |
| 886 | brelse(fibh.sbh); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 887 | |
| 888 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 889 | unlock_kernel(); |
| 890 | return retval; |
| 891 | } |
| 892 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 893 | static int udf_symlink(struct inode *dir, struct dentry *dentry, |
| 894 | const char *symname) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 895 | { |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 896 | struct inode *inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 897 | struct pathComponent *pc; |
Al Viro | 391e8bb | 2010-01-31 21:28:48 -0500 | [diff] [blame] | 898 | const char *compstart; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 899 | struct udf_fileident_bh fibh; |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 900 | struct extent_position epos = {}; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 901 | int eoffset, elen = 0; |
| 902 | struct fileIdentDesc *fi; |
| 903 | struct fileIdentDesc cfi; |
Al Viro | 391e8bb | 2010-01-31 21:28:48 -0500 | [diff] [blame] | 904 | uint8_t *ea; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 905 | int err; |
| 906 | int block; |
Al Viro | 391e8bb | 2010-01-31 21:28:48 -0500 | [diff] [blame] | 907 | unsigned char *name = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 908 | int namelen; |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 909 | struct buffer_head *bh; |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 910 | struct udf_inode_info *iinfo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 911 | |
Christoph Hellwig | 871a293 | 2010-03-03 09:05:07 -0500 | [diff] [blame] | 912 | dquot_initialize(dir); |
Christoph Hellwig | 907f455 | 2010-03-03 09:05:06 -0500 | [diff] [blame] | 913 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 914 | lock_kernel(); |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 915 | inode = udf_new_inode(dir, S_IFLNK, &err); |
| 916 | if (!inode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 917 | goto out; |
| 918 | |
Jan Kara | b80697c | 2008-03-04 14:14:05 +0100 | [diff] [blame] | 919 | name = kmalloc(UDF_NAME_LEN, GFP_NOFS); |
| 920 | if (!name) { |
| 921 | err = -ENOMEM; |
| 922 | goto out_no_entry; |
| 923 | } |
| 924 | |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 925 | iinfo = UDF_I(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 926 | inode->i_mode = S_IFLNK | S_IRWXUGO; |
| 927 | inode->i_data.a_ops = &udf_symlink_aops; |
| 928 | inode->i_op = &page_symlink_inode_operations; |
| 929 | |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 930 | if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 931 | struct kernel_lb_addr eloc; |
Harvey Harrison | 78e917d | 2008-04-28 02:16:19 -0700 | [diff] [blame] | 932 | uint32_t bsize; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 933 | |
| 934 | block = udf_new_block(inode->i_sb, inode, |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 935 | iinfo->i_location.partitionReferenceNum, |
| 936 | iinfo->i_location.logicalBlockNum, &err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 937 | if (!block) |
| 938 | goto out_no_entry; |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 939 | epos.block = iinfo->i_location; |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 940 | epos.offset = udf_file_entry_alloc_offset(inode); |
| 941 | epos.bh = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 942 | eloc.logicalBlockNum = block; |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 943 | eloc.partitionReferenceNum = |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 944 | iinfo->i_location.partitionReferenceNum; |
Harvey Harrison | 78e917d | 2008-04-28 02:16:19 -0700 | [diff] [blame] | 945 | bsize = inode->i_sb->s_blocksize; |
| 946 | iinfo->i_lenExtents = bsize; |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 947 | udf_add_aext(inode, &epos, &eloc, bsize, 0); |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 948 | brelse(epos.bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 949 | |
| 950 | block = udf_get_pblock(inode->i_sb, block, |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 951 | iinfo->i_location.partitionReferenceNum, |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 952 | 0); |
Jan Kara | 2c948b3 | 2009-12-03 13:39:28 +0100 | [diff] [blame] | 953 | epos.bh = udf_tgetblk(inode->i_sb, block); |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 954 | lock_buffer(epos.bh); |
| 955 | memset(epos.bh->b_data, 0x00, inode->i_sb->s_blocksize); |
| 956 | set_buffer_uptodate(epos.bh); |
| 957 | unlock_buffer(epos.bh); |
| 958 | mark_buffer_dirty_inode(epos.bh, inode); |
| 959 | ea = epos.bh->b_data + udf_ext0_offset(inode); |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 960 | } else |
| 961 | ea = iinfo->i_ext.i_data + iinfo->i_lenEAttr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 962 | |
| 963 | eoffset = inode->i_sb->s_blocksize - udf_ext0_offset(inode); |
| 964 | pc = (struct pathComponent *)ea; |
| 965 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 966 | if (*symname == '/') { |
| 967 | do { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 968 | symname++; |
| 969 | } while (*symname == '/'); |
| 970 | |
| 971 | pc->componentType = 1; |
| 972 | pc->lengthComponentIdent = 0; |
| 973 | pc->componentFileVersionNum = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 974 | elen += sizeof(struct pathComponent); |
| 975 | } |
| 976 | |
| 977 | err = -ENAMETOOLONG; |
| 978 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 979 | while (*symname) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 980 | if (elen + sizeof(struct pathComponent) > eoffset) |
| 981 | goto out_no_entry; |
| 982 | |
| 983 | pc = (struct pathComponent *)(ea + elen); |
| 984 | |
Al Viro | 391e8bb | 2010-01-31 21:28:48 -0500 | [diff] [blame] | 985 | compstart = symname; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 986 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 987 | do { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 988 | symname++; |
| 989 | } while (*symname && *symname != '/'); |
| 990 | |
| 991 | pc->componentType = 5; |
| 992 | pc->lengthComponentIdent = 0; |
| 993 | pc->componentFileVersionNum = 0; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 994 | if (compstart[0] == '.') { |
| 995 | if ((symname - compstart) == 1) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 996 | pc->componentType = 4; |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 997 | else if ((symname - compstart) == 2 && |
| 998 | compstart[1] == '.') |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 999 | pc->componentType = 3; |
| 1000 | } |
| 1001 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1002 | if (pc->componentType == 5) { |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1003 | namelen = udf_put_filename(inode->i_sb, compstart, name, |
| 1004 | symname - compstart); |
| 1005 | if (!namelen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1006 | goto out_no_entry; |
| 1007 | |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1008 | if (elen + sizeof(struct pathComponent) + namelen > |
| 1009 | eoffset) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1010 | goto out_no_entry; |
| 1011 | else |
| 1012 | pc->lengthComponentIdent = namelen; |
| 1013 | |
| 1014 | memcpy(pc->componentIdent, name, namelen); |
| 1015 | } |
| 1016 | |
| 1017 | elen += sizeof(struct pathComponent) + pc->lengthComponentIdent; |
| 1018 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1019 | if (*symname) { |
| 1020 | do { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1021 | symname++; |
| 1022 | } while (*symname == '/'); |
| 1023 | } |
| 1024 | } |
| 1025 | |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 1026 | brelse(epos.bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1027 | inode->i_size = elen; |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 1028 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
| 1029 | iinfo->i_lenAlloc = inode->i_size; |
Jan Kara | 2c948b3 | 2009-12-03 13:39:28 +0100 | [diff] [blame] | 1030 | else |
| 1031 | udf_truncate_tail_extent(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1032 | mark_inode_dirty(inode); |
| 1033 | |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1034 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
| 1035 | if (!fi) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1036 | goto out_no_entry; |
| 1037 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 1038 | cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 1039 | bh = UDF_SB(inode->i_sb)->s_lvid_bh; |
| 1040 | if (bh) { |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1041 | struct logicalVolIntegrityDesc *lvid = |
| 1042 | (struct logicalVolIntegrityDesc *)bh->b_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1043 | struct logicalVolHeaderDesc *lvhd; |
| 1044 | uint64_t uniqueID; |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1045 | lvhd = (struct logicalVolHeaderDesc *) |
| 1046 | lvid->logicalVolContentsUse; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1047 | uniqueID = le64_to_cpu(lvhd->uniqueID); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1048 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
| 1049 | cpu_to_le32(uniqueID & 0x00000000FFFFFFFFUL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1050 | if (!(++uniqueID & 0x00000000FFFFFFFFUL)) |
| 1051 | uniqueID += 16; |
| 1052 | lvhd->uniqueID = cpu_to_le64(uniqueID); |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 1053 | mark_buffer_dirty(bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1054 | } |
| 1055 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); |
Marcin Slusarz | c0b3443 | 2008-02-08 04:20:42 -0800 | [diff] [blame] | 1056 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1057 | mark_inode_dirty(dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1058 | if (fibh.sbh != fibh.ebh) |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 1059 | brelse(fibh.ebh); |
| 1060 | brelse(fibh.sbh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1061 | d_instantiate(dentry, inode); |
| 1062 | err = 0; |
| 1063 | |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1064 | out: |
Jan Kara | b80697c | 2008-03-04 14:14:05 +0100 | [diff] [blame] | 1065 | kfree(name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1066 | unlock_kernel(); |
| 1067 | return err; |
| 1068 | |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1069 | out_no_entry: |
Dave Hansen | 9a53c3a | 2006-09-30 23:29:03 -0700 | [diff] [blame] | 1070 | inode_dec_link_count(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1071 | iput(inode); |
| 1072 | goto out; |
| 1073 | } |
| 1074 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1075 | static int udf_link(struct dentry *old_dentry, struct inode *dir, |
| 1076 | struct dentry *dentry) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1077 | { |
| 1078 | struct inode *inode = old_dentry->d_inode; |
| 1079 | struct udf_fileident_bh fibh; |
| 1080 | struct fileIdentDesc cfi, *fi; |
| 1081 | int err; |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 1082 | struct buffer_head *bh; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1083 | |
Christoph Hellwig | 871a293 | 2010-03-03 09:05:07 -0500 | [diff] [blame] | 1084 | dquot_initialize(dir); |
Christoph Hellwig | 907f455 | 2010-03-03 09:05:06 -0500 | [diff] [blame] | 1085 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1086 | lock_kernel(); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1087 | if (inode->i_nlink >= (256 << sizeof(inode->i_nlink)) - 1) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1088 | unlock_kernel(); |
| 1089 | return -EMLINK; |
| 1090 | } |
| 1091 | |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1092 | fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
| 1093 | if (!fi) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1094 | unlock_kernel(); |
| 1095 | return err; |
| 1096 | } |
| 1097 | cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); |
Marcin Slusarz | c0b3443 | 2008-02-08 04:20:42 -0800 | [diff] [blame] | 1098 | cfi.icb.extLocation = cpu_to_lelb(UDF_I(inode)->i_location); |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 1099 | bh = UDF_SB(inode->i_sb)->s_lvid_bh; |
| 1100 | if (bh) { |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1101 | struct logicalVolIntegrityDesc *lvid = |
| 1102 | (struct logicalVolIntegrityDesc *)bh->b_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1103 | struct logicalVolHeaderDesc *lvhd; |
| 1104 | uint64_t uniqueID; |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1105 | lvhd = (struct logicalVolHeaderDesc *) |
| 1106 | (lvid->logicalVolContentsUse); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1107 | uniqueID = le64_to_cpu(lvhd->uniqueID); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1108 | *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
| 1109 | cpu_to_le32(uniqueID & 0x00000000FFFFFFFFUL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1110 | if (!(++uniqueID & 0x00000000FFFFFFFFUL)) |
| 1111 | uniqueID += 16; |
| 1112 | lvhd->uniqueID = cpu_to_le64(uniqueID); |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 1113 | mark_buffer_dirty(bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1114 | } |
| 1115 | udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); |
Marcin Slusarz | c0b3443 | 2008-02-08 04:20:42 -0800 | [diff] [blame] | 1116 | if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1117 | mark_inode_dirty(dir); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1118 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1119 | if (fibh.sbh != fibh.ebh) |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 1120 | brelse(fibh.ebh); |
| 1121 | brelse(fibh.sbh); |
Dave Hansen | d8c76e6 | 2006-09-30 23:29:04 -0700 | [diff] [blame] | 1122 | inc_nlink(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1123 | inode->i_ctime = current_fs_time(inode->i_sb); |
| 1124 | mark_inode_dirty(inode); |
| 1125 | atomic_inc(&inode->i_count); |
| 1126 | d_instantiate(dentry, inode); |
| 1127 | unlock_kernel(); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1128 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1129 | return 0; |
| 1130 | } |
| 1131 | |
| 1132 | /* Anybody can rename anything with this: the permission checks are left to the |
| 1133 | * higher-level routines. |
| 1134 | */ |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1135 | static int udf_rename(struct inode *old_dir, struct dentry *old_dentry, |
| 1136 | struct inode *new_dir, struct dentry *new_dentry) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1137 | { |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1138 | struct inode *old_inode = old_dentry->d_inode; |
| 1139 | struct inode *new_inode = new_dentry->d_inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1140 | struct udf_fileident_bh ofibh, nfibh; |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1141 | struct fileIdentDesc *ofi = NULL, *nfi = NULL, *dir_fi = NULL; |
| 1142 | struct fileIdentDesc ocfi, ncfi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1143 | struct buffer_head *dir_bh = NULL; |
| 1144 | int retval = -ENOENT; |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 1145 | struct kernel_lb_addr tloc; |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 1146 | struct udf_inode_info *old_iinfo = UDF_I(old_inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1147 | |
Christoph Hellwig | 871a293 | 2010-03-03 09:05:07 -0500 | [diff] [blame] | 1148 | dquot_initialize(old_dir); |
| 1149 | dquot_initialize(new_dir); |
Christoph Hellwig | 907f455 | 2010-03-03 09:05:06 -0500 | [diff] [blame] | 1150 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1151 | lock_kernel(); |
Al Viro | 9fbb76c | 2008-10-12 00:15:17 -0400 | [diff] [blame] | 1152 | ofi = udf_find_entry(old_dir, &old_dentry->d_name, &ofibh, &ocfi); |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1153 | if (ofi) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1154 | if (ofibh.sbh != ofibh.ebh) |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 1155 | brelse(ofibh.ebh); |
| 1156 | brelse(ofibh.sbh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1157 | } |
| 1158 | tloc = lelb_to_cpu(ocfi.icb.extLocation); |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 1159 | if (!ofi || udf_get_lb_pblock(old_dir->i_sb, &tloc, 0) |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1160 | != old_inode->i_ino) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1161 | goto end_rename; |
| 1162 | |
Al Viro | 9fbb76c | 2008-10-12 00:15:17 -0400 | [diff] [blame] | 1163 | nfi = udf_find_entry(new_dir, &new_dentry->d_name, &nfibh, &ncfi); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1164 | if (nfi) { |
| 1165 | if (!new_inode) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1166 | if (nfibh.sbh != nfibh.ebh) |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 1167 | brelse(nfibh.ebh); |
| 1168 | brelse(nfibh.sbh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1169 | nfi = NULL; |
| 1170 | } |
| 1171 | } |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1172 | if (S_ISDIR(old_inode->i_mode)) { |
Marcin Slusarz | 7f3fbd0 | 2008-02-08 04:20:49 -0800 | [diff] [blame] | 1173 | int offset = udf_ext0_offset(old_inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1174 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1175 | if (new_inode) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1176 | retval = -ENOTEMPTY; |
| 1177 | if (!empty_dir(new_inode)) |
| 1178 | goto end_rename; |
| 1179 | } |
| 1180 | retval = -EIO; |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 1181 | if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1182 | dir_fi = udf_get_fileident( |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 1183 | old_iinfo->i_ext.i_data - |
| 1184 | (old_iinfo->i_efe ? |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1185 | sizeof(struct extendedFileEntry) : |
| 1186 | sizeof(struct fileEntry)), |
| 1187 | old_inode->i_sb->s_blocksize, &offset); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1188 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1189 | dir_bh = udf_bread(old_inode, 0, 0, &retval); |
| 1190 | if (!dir_bh) |
| 1191 | goto end_rename; |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1192 | dir_fi = udf_get_fileident(dir_bh->b_data, |
| 1193 | old_inode->i_sb->s_blocksize, &offset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1194 | } |
| 1195 | if (!dir_fi) |
| 1196 | goto end_rename; |
| 1197 | tloc = lelb_to_cpu(dir_fi->icb.extLocation); |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 1198 | if (udf_get_lb_pblock(old_inode->i_sb, &tloc, 0) != |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1199 | old_dir->i_ino) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1200 | goto end_rename; |
| 1201 | |
| 1202 | retval = -EMLINK; |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1203 | if (!new_inode && |
| 1204 | new_dir->i_nlink >= |
| 1205 | (256 << sizeof(new_dir->i_nlink)) - 1) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1206 | goto end_rename; |
| 1207 | } |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1208 | if (!nfi) { |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1209 | nfi = udf_add_entry(new_dir, new_dentry, &nfibh, &ncfi, |
| 1210 | &retval); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1211 | if (!nfi) |
| 1212 | goto end_rename; |
| 1213 | } |
| 1214 | |
| 1215 | /* |
| 1216 | * Like most other Unix systems, set the ctime for inodes on a |
| 1217 | * rename. |
| 1218 | */ |
| 1219 | old_inode->i_ctime = current_fs_time(old_inode->i_sb); |
| 1220 | mark_inode_dirty(old_inode); |
| 1221 | |
| 1222 | /* |
| 1223 | * ok, that's it |
| 1224 | */ |
| 1225 | ncfi.fileVersionNum = ocfi.fileVersionNum; |
| 1226 | ncfi.fileCharacteristics = ocfi.fileCharacteristics; |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 1227 | memcpy(&(ncfi.icb), &(ocfi.icb), sizeof(struct long_ad)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1228 | udf_write_fi(new_dir, &ncfi, nfi, &nfibh, NULL, NULL); |
| 1229 | |
| 1230 | /* The old fid may have moved - find it again */ |
Al Viro | 9fbb76c | 2008-10-12 00:15:17 -0400 | [diff] [blame] | 1231 | ofi = udf_find_entry(old_dir, &old_dentry->d_name, &ofibh, &ocfi); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1232 | udf_delete_entry(old_dir, ofi, &ofibh, &ocfi); |
| 1233 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1234 | if (new_inode) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1235 | new_inode->i_ctime = current_fs_time(new_inode->i_sb); |
Dave Hansen | 9a53c3a | 2006-09-30 23:29:03 -0700 | [diff] [blame] | 1236 | inode_dec_link_count(new_inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1237 | } |
| 1238 | old_dir->i_ctime = old_dir->i_mtime = current_fs_time(old_dir->i_sb); |
| 1239 | mark_inode_dirty(old_dir); |
| 1240 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1241 | if (dir_fi) { |
Marcin Slusarz | c0b3443 | 2008-02-08 04:20:42 -0800 | [diff] [blame] | 1242 | 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] | 1243 | udf_update_tag((char *)dir_fi, |
| 1244 | (sizeof(struct fileIdentDesc) + |
| 1245 | le16_to_cpu(dir_fi->lengthOfImpUse) + 3) & ~3); |
Marcin Slusarz | 48d6d8f | 2008-02-08 04:20:44 -0800 | [diff] [blame] | 1246 | if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1247 | mark_inode_dirty(old_inode); |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1248 | else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1249 | mark_buffer_dirty_inode(dir_bh, old_inode); |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1250 | |
Dave Hansen | 9a53c3a | 2006-09-30 23:29:03 -0700 | [diff] [blame] | 1251 | inode_dec_link_count(old_dir); |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1252 | if (new_inode) |
Dave Hansen | 9a53c3a | 2006-09-30 23:29:03 -0700 | [diff] [blame] | 1253 | inode_dec_link_count(new_inode); |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1254 | else { |
Dave Hansen | d8c76e6 | 2006-09-30 23:29:04 -0700 | [diff] [blame] | 1255 | inc_nlink(new_dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1256 | mark_inode_dirty(new_dir); |
| 1257 | } |
| 1258 | } |
| 1259 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1260 | if (ofi) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1261 | if (ofibh.sbh != ofibh.ebh) |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 1262 | brelse(ofibh.ebh); |
| 1263 | brelse(ofibh.sbh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1264 | } |
| 1265 | |
| 1266 | retval = 0; |
| 1267 | |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1268 | end_rename: |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 1269 | brelse(dir_bh); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1270 | if (nfi) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1271 | if (nfibh.sbh != nfibh.ebh) |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 1272 | brelse(nfibh.ebh); |
| 1273 | brelse(nfibh.sbh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1274 | } |
| 1275 | unlock_kernel(); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1276 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1277 | return retval; |
| 1278 | } |
| 1279 | |
Rasmus Rohde | 221e583 | 2008-04-30 17:22:06 +0200 | [diff] [blame] | 1280 | static struct dentry *udf_get_parent(struct dentry *child) |
| 1281 | { |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 1282 | struct kernel_lb_addr tloc; |
Rasmus Rohde | 221e583 | 2008-04-30 17:22:06 +0200 | [diff] [blame] | 1283 | struct inode *inode = NULL; |
Al Viro | 9fbb76c | 2008-10-12 00:15:17 -0400 | [diff] [blame] | 1284 | struct qstr dotdot = {.name = "..", .len = 2}; |
Rasmus Rohde | 221e583 | 2008-04-30 17:22:06 +0200 | [diff] [blame] | 1285 | struct fileIdentDesc cfi; |
| 1286 | struct udf_fileident_bh fibh; |
| 1287 | |
Rasmus Rohde | 221e583 | 2008-04-30 17:22:06 +0200 | [diff] [blame] | 1288 | lock_kernel(); |
| 1289 | if (!udf_find_entry(child->d_inode, &dotdot, &fibh, &cfi)) |
| 1290 | goto out_unlock; |
| 1291 | |
| 1292 | if (fibh.sbh != fibh.ebh) |
| 1293 | brelse(fibh.ebh); |
| 1294 | brelse(fibh.sbh); |
| 1295 | |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 1296 | tloc = lelb_to_cpu(cfi.icb.extLocation); |
| 1297 | inode = udf_iget(child->d_inode->i_sb, &tloc); |
Rasmus Rohde | 221e583 | 2008-04-30 17:22:06 +0200 | [diff] [blame] | 1298 | if (!inode) |
| 1299 | goto out_unlock; |
| 1300 | unlock_kernel(); |
| 1301 | |
Christoph Hellwig | 4400372 | 2008-08-11 15:49:04 +0200 | [diff] [blame] | 1302 | return d_obtain_alias(inode); |
Rasmus Rohde | 221e583 | 2008-04-30 17:22:06 +0200 | [diff] [blame] | 1303 | out_unlock: |
| 1304 | unlock_kernel(); |
| 1305 | return ERR_PTR(-EACCES); |
| 1306 | } |
| 1307 | |
| 1308 | |
| 1309 | static struct dentry *udf_nfs_get_inode(struct super_block *sb, u32 block, |
| 1310 | u16 partref, __u32 generation) |
| 1311 | { |
| 1312 | struct inode *inode; |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 1313 | struct kernel_lb_addr loc; |
Rasmus Rohde | 221e583 | 2008-04-30 17:22:06 +0200 | [diff] [blame] | 1314 | |
| 1315 | if (block == 0) |
| 1316 | return ERR_PTR(-ESTALE); |
| 1317 | |
| 1318 | loc.logicalBlockNum = block; |
| 1319 | loc.partitionReferenceNum = partref; |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 1320 | inode = udf_iget(sb, &loc); |
Rasmus Rohde | 221e583 | 2008-04-30 17:22:06 +0200 | [diff] [blame] | 1321 | |
| 1322 | if (inode == NULL) |
| 1323 | return ERR_PTR(-ENOMEM); |
| 1324 | |
| 1325 | if (generation && inode->i_generation != generation) { |
| 1326 | iput(inode); |
| 1327 | return ERR_PTR(-ESTALE); |
| 1328 | } |
Christoph Hellwig | 4400372 | 2008-08-11 15:49:04 +0200 | [diff] [blame] | 1329 | return d_obtain_alias(inode); |
Rasmus Rohde | 221e583 | 2008-04-30 17:22:06 +0200 | [diff] [blame] | 1330 | } |
| 1331 | |
| 1332 | static struct dentry *udf_fh_to_dentry(struct super_block *sb, |
| 1333 | struct fid *fid, int fh_len, int fh_type) |
| 1334 | { |
| 1335 | if ((fh_len != 3 && fh_len != 5) || |
| 1336 | (fh_type != FILEID_UDF_WITH_PARENT && |
| 1337 | fh_type != FILEID_UDF_WITHOUT_PARENT)) |
| 1338 | return NULL; |
| 1339 | |
| 1340 | return udf_nfs_get_inode(sb, fid->udf.block, fid->udf.partref, |
| 1341 | fid->udf.generation); |
| 1342 | } |
| 1343 | |
| 1344 | static struct dentry *udf_fh_to_parent(struct super_block *sb, |
| 1345 | struct fid *fid, int fh_len, int fh_type) |
| 1346 | { |
| 1347 | if (fh_len != 5 || fh_type != FILEID_UDF_WITH_PARENT) |
| 1348 | return NULL; |
| 1349 | |
| 1350 | return udf_nfs_get_inode(sb, fid->udf.parent_block, |
| 1351 | fid->udf.parent_partref, |
| 1352 | fid->udf.parent_generation); |
| 1353 | } |
| 1354 | static int udf_encode_fh(struct dentry *de, __u32 *fh, int *lenp, |
| 1355 | int connectable) |
| 1356 | { |
| 1357 | int len = *lenp; |
| 1358 | struct inode *inode = de->d_inode; |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 1359 | struct kernel_lb_addr location = UDF_I(inode)->i_location; |
Rasmus Rohde | 221e583 | 2008-04-30 17:22:06 +0200 | [diff] [blame] | 1360 | struct fid *fid = (struct fid *)fh; |
| 1361 | int type = FILEID_UDF_WITHOUT_PARENT; |
| 1362 | |
| 1363 | if (len < 3 || (connectable && len < 5)) |
| 1364 | return 255; |
| 1365 | |
| 1366 | *lenp = 3; |
| 1367 | fid->udf.block = location.logicalBlockNum; |
| 1368 | fid->udf.partref = location.partitionReferenceNum; |
| 1369 | fid->udf.generation = inode->i_generation; |
| 1370 | |
| 1371 | if (connectable && !S_ISDIR(inode->i_mode)) { |
| 1372 | spin_lock(&de->d_lock); |
| 1373 | inode = de->d_parent->d_inode; |
| 1374 | location = UDF_I(inode)->i_location; |
| 1375 | fid->udf.parent_block = location.logicalBlockNum; |
| 1376 | fid->udf.parent_partref = location.partitionReferenceNum; |
| 1377 | fid->udf.parent_generation = inode->i_generation; |
| 1378 | spin_unlock(&de->d_lock); |
| 1379 | *lenp = 5; |
| 1380 | type = FILEID_UDF_WITH_PARENT; |
| 1381 | } |
| 1382 | |
| 1383 | return type; |
| 1384 | } |
| 1385 | |
| 1386 | const struct export_operations udf_export_ops = { |
| 1387 | .encode_fh = udf_encode_fh, |
| 1388 | .fh_to_dentry = udf_fh_to_dentry, |
| 1389 | .fh_to_parent = udf_fh_to_parent, |
| 1390 | .get_parent = udf_get_parent, |
| 1391 | }; |
| 1392 | |
Arjan van de Ven | c5ef1c4 | 2007-02-12 00:55:40 -0800 | [diff] [blame] | 1393 | const struct inode_operations udf_dir_inode_operations = { |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1394 | .lookup = udf_lookup, |
| 1395 | .create = udf_create, |
| 1396 | .link = udf_link, |
| 1397 | .unlink = udf_unlink, |
| 1398 | .symlink = udf_symlink, |
| 1399 | .mkdir = udf_mkdir, |
| 1400 | .rmdir = udf_rmdir, |
| 1401 | .mknod = udf_mknod, |
| 1402 | .rename = udf_rename, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1403 | }; |