Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * inode.c |
| 3 | * |
| 4 | * PURPOSE |
| 5 | * Inode 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 Dave Boynton |
| 14 | * (C) 1998-2004 Ben Fennema |
| 15 | * (C) 1999-2000 Stelias Computing Inc |
| 16 | * |
| 17 | * HISTORY |
| 18 | * |
| 19 | * 10/04/98 dgb Added rudimentary directory functions |
| 20 | * 10/07/98 Fully working udf_block_map! It works! |
| 21 | * 11/25/98 bmap altered to better support extents |
| 22 | * 12/06/98 blf partition support in udf_iget, udf_block_map and udf_read_inode |
| 23 | * 12/12/98 rewrote udf_block_map to handle next extents and descs across |
| 24 | * block boundaries (which is not actually allowed) |
| 25 | * 12/20/98 added support for strategy 4096 |
| 26 | * 03/07/99 rewrote udf_block_map (again) |
| 27 | * New funcs, inode_bmap, udf_next_aext |
| 28 | * 04/19/99 Support for writing device EA's for major/minor # |
| 29 | */ |
| 30 | |
| 31 | #include "udfdecl.h" |
| 32 | #include <linux/mm.h> |
| 33 | #include <linux/smp_lock.h> |
| 34 | #include <linux/module.h> |
| 35 | #include <linux/pagemap.h> |
| 36 | #include <linux/buffer_head.h> |
| 37 | #include <linux/writeback.h> |
| 38 | #include <linux/slab.h> |
| 39 | |
| 40 | #include "udf_i.h" |
| 41 | #include "udf_sb.h" |
| 42 | |
| 43 | MODULE_AUTHOR("Ben Fennema"); |
| 44 | MODULE_DESCRIPTION("Universal Disk Format Filesystem"); |
| 45 | MODULE_LICENSE("GPL"); |
| 46 | |
| 47 | #define EXTENT_MERGE_SIZE 5 |
| 48 | |
| 49 | static mode_t udf_convert_permissions(struct fileEntry *); |
| 50 | static int udf_update_inode(struct inode *, int); |
| 51 | static void udf_fill_inode(struct inode *, struct buffer_head *); |
Cyrill Gorcunov | 647bd61 | 2007-07-15 23:39:47 -0700 | [diff] [blame^] | 52 | static int udf_alloc_i_data(struct inode *inode, size_t size); |
Jan Kara | 60448b1 | 2007-05-08 00:35:13 -0700 | [diff] [blame] | 53 | static struct buffer_head *inode_getblk(struct inode *, sector_t, int *, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | long *, int *); |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 55 | static int8_t udf_insert_aext(struct inode *, struct extent_position, |
| 56 | kernel_lb_addr, uint32_t); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | static void udf_split_extents(struct inode *, int *, int, int, |
| 58 | kernel_long_ad [EXTENT_MERGE_SIZE], int *); |
| 59 | static void udf_prealloc_extents(struct inode *, int, int, |
| 60 | kernel_long_ad [EXTENT_MERGE_SIZE], int *); |
| 61 | static void udf_merge_extents(struct inode *, |
| 62 | kernel_long_ad [EXTENT_MERGE_SIZE], int *); |
| 63 | static void udf_update_extents(struct inode *, |
| 64 | kernel_long_ad [EXTENT_MERGE_SIZE], int, int, |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 65 | struct extent_position *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | static int udf_get_block(struct inode *, sector_t, struct buffer_head *, int); |
| 67 | |
| 68 | /* |
| 69 | * udf_delete_inode |
| 70 | * |
| 71 | * PURPOSE |
| 72 | * Clean-up before the specified inode is destroyed. |
| 73 | * |
| 74 | * DESCRIPTION |
| 75 | * This routine is called when the kernel destroys an inode structure |
| 76 | * ie. when iput() finds i_count == 0. |
| 77 | * |
| 78 | * HISTORY |
| 79 | * July 1, 1997 - Andrew E. Mileski |
| 80 | * Written, tested, and released. |
| 81 | * |
| 82 | * Called at the last iput() if i_nlink is zero. |
| 83 | */ |
| 84 | void udf_delete_inode(struct inode * inode) |
| 85 | { |
Mark Fasheh | fef2665 | 2005-09-09 13:01:31 -0700 | [diff] [blame] | 86 | truncate_inode_pages(&inode->i_data, 0); |
| 87 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | if (is_bad_inode(inode)) |
| 89 | goto no_delete; |
| 90 | |
| 91 | inode->i_size = 0; |
| 92 | udf_truncate(inode); |
| 93 | lock_kernel(); |
| 94 | |
| 95 | udf_update_inode(inode, IS_SYNC(inode)); |
| 96 | udf_free_inode(inode); |
| 97 | |
| 98 | unlock_kernel(); |
| 99 | return; |
| 100 | no_delete: |
| 101 | clear_inode(inode); |
| 102 | } |
| 103 | |
Jan Kara | 74584ae | 2007-06-16 10:16:14 -0700 | [diff] [blame] | 104 | /* |
| 105 | * If we are going to release inode from memory, we discard preallocation and |
| 106 | * truncate last inode extent to proper length. We could use drop_inode() but |
| 107 | * it's called under inode_lock and thus we cannot mark inode dirty there. We |
| 108 | * use clear_inode() but we have to make sure to write inode as it's not written |
| 109 | * automatically. |
| 110 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 111 | void udf_clear_inode(struct inode *inode) |
| 112 | { |
| 113 | if (!(inode->i_sb->s_flags & MS_RDONLY)) { |
| 114 | lock_kernel(); |
Jan Kara | 74584ae | 2007-06-16 10:16:14 -0700 | [diff] [blame] | 115 | /* Discard preallocation for directories, symlinks, etc. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 116 | udf_discard_prealloc(inode); |
Jan Kara | 74584ae | 2007-06-16 10:16:14 -0700 | [diff] [blame] | 117 | udf_truncate_tail_extent(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | unlock_kernel(); |
Jan Kara | 74584ae | 2007-06-16 10:16:14 -0700 | [diff] [blame] | 119 | write_inode_now(inode, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | kfree(UDF_I_DATA(inode)); |
| 122 | UDF_I_DATA(inode) = NULL; |
| 123 | } |
| 124 | |
| 125 | static int udf_writepage(struct page *page, struct writeback_control *wbc) |
| 126 | { |
| 127 | return block_write_full_page(page, udf_get_block, wbc); |
| 128 | } |
| 129 | |
| 130 | static int udf_readpage(struct file *file, struct page *page) |
| 131 | { |
| 132 | return block_read_full_page(page, udf_get_block); |
| 133 | } |
| 134 | |
| 135 | static int udf_prepare_write(struct file *file, struct page *page, unsigned from, unsigned to) |
| 136 | { |
| 137 | return block_prepare_write(page, from, to, udf_get_block); |
| 138 | } |
| 139 | |
| 140 | static sector_t udf_bmap(struct address_space *mapping, sector_t block) |
| 141 | { |
| 142 | return generic_block_bmap(mapping,block,udf_get_block); |
| 143 | } |
| 144 | |
Christoph Hellwig | f5e54d6 | 2006-06-28 04:26:44 -0700 | [diff] [blame] | 145 | const struct address_space_operations udf_aops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | .readpage = udf_readpage, |
| 147 | .writepage = udf_writepage, |
| 148 | .sync_page = block_sync_page, |
| 149 | .prepare_write = udf_prepare_write, |
| 150 | .commit_write = generic_commit_write, |
| 151 | .bmap = udf_bmap, |
| 152 | }; |
| 153 | |
| 154 | void udf_expand_file_adinicb(struct inode * inode, int newsize, int * err) |
| 155 | { |
| 156 | struct page *page; |
| 157 | char *kaddr; |
| 158 | struct writeback_control udf_wbc = { |
| 159 | .sync_mode = WB_SYNC_NONE, |
| 160 | .nr_to_write = 1, |
| 161 | }; |
| 162 | |
| 163 | /* from now on we have normal address_space methods */ |
| 164 | inode->i_data.a_ops = &udf_aops; |
| 165 | |
| 166 | if (!UDF_I_LENALLOC(inode)) |
| 167 | { |
| 168 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) |
| 169 | UDF_I_ALLOCTYPE(inode) = ICBTAG_FLAG_AD_SHORT; |
| 170 | else |
| 171 | UDF_I_ALLOCTYPE(inode) = ICBTAG_FLAG_AD_LONG; |
| 172 | mark_inode_dirty(inode); |
| 173 | return; |
| 174 | } |
| 175 | |
| 176 | page = grab_cache_page(inode->i_mapping, 0); |
Matt Mackall | cd7619d | 2005-05-01 08:59:01 -0700 | [diff] [blame] | 177 | BUG_ON(!PageLocked(page)); |
| 178 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 179 | if (!PageUptodate(page)) |
| 180 | { |
| 181 | kaddr = kmap(page); |
| 182 | memset(kaddr + UDF_I_LENALLOC(inode), 0x00, |
| 183 | PAGE_CACHE_SIZE - UDF_I_LENALLOC(inode)); |
| 184 | memcpy(kaddr, UDF_I_DATA(inode) + UDF_I_LENEATTR(inode), |
| 185 | UDF_I_LENALLOC(inode)); |
| 186 | flush_dcache_page(page); |
| 187 | SetPageUptodate(page); |
| 188 | kunmap(page); |
| 189 | } |
| 190 | memset(UDF_I_DATA(inode) + UDF_I_LENEATTR(inode), 0x00, |
| 191 | UDF_I_LENALLOC(inode)); |
| 192 | UDF_I_LENALLOC(inode) = 0; |
| 193 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) |
| 194 | UDF_I_ALLOCTYPE(inode) = ICBTAG_FLAG_AD_SHORT; |
| 195 | else |
| 196 | UDF_I_ALLOCTYPE(inode) = ICBTAG_FLAG_AD_LONG; |
| 197 | |
| 198 | inode->i_data.a_ops->writepage(page, &udf_wbc); |
| 199 | page_cache_release(page); |
| 200 | |
| 201 | mark_inode_dirty(inode); |
| 202 | } |
| 203 | |
| 204 | struct buffer_head * udf_expand_dir_adinicb(struct inode *inode, int *block, int *err) |
| 205 | { |
| 206 | int newblock; |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 207 | struct buffer_head *dbh = NULL; |
| 208 | kernel_lb_addr eloc; |
| 209 | uint32_t elen; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 210 | uint8_t alloctype; |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 211 | struct extent_position epos; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 212 | |
| 213 | struct udf_fileident_bh sfibh, dfibh; |
| 214 | loff_t f_pos = udf_ext0_offset(inode) >> 2; |
| 215 | int size = (udf_ext0_offset(inode) + inode->i_size) >> 2; |
| 216 | struct fileIdentDesc cfi, *sfi, *dfi; |
| 217 | |
| 218 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) |
| 219 | alloctype = ICBTAG_FLAG_AD_SHORT; |
| 220 | else |
| 221 | alloctype = ICBTAG_FLAG_AD_LONG; |
| 222 | |
| 223 | if (!inode->i_size) |
| 224 | { |
| 225 | UDF_I_ALLOCTYPE(inode) = alloctype; |
| 226 | mark_inode_dirty(inode); |
| 227 | return NULL; |
| 228 | } |
| 229 | |
| 230 | /* alloc block, and copy data to it */ |
| 231 | *block = udf_new_block(inode->i_sb, inode, |
| 232 | UDF_I_LOCATION(inode).partitionReferenceNum, |
| 233 | UDF_I_LOCATION(inode).logicalBlockNum, err); |
| 234 | |
| 235 | if (!(*block)) |
| 236 | return NULL; |
| 237 | newblock = udf_get_pblock(inode->i_sb, *block, |
| 238 | UDF_I_LOCATION(inode).partitionReferenceNum, 0); |
| 239 | if (!newblock) |
| 240 | return NULL; |
| 241 | dbh = udf_tgetblk(inode->i_sb, newblock); |
| 242 | if (!dbh) |
| 243 | return NULL; |
| 244 | lock_buffer(dbh); |
| 245 | memset(dbh->b_data, 0x00, inode->i_sb->s_blocksize); |
| 246 | set_buffer_uptodate(dbh); |
| 247 | unlock_buffer(dbh); |
| 248 | mark_buffer_dirty_inode(dbh, inode); |
| 249 | |
| 250 | sfibh.soffset = sfibh.eoffset = (f_pos & ((inode->i_sb->s_blocksize - 1) >> 2)) << 2; |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 251 | sfibh.sbh = sfibh.ebh = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 252 | dfibh.soffset = dfibh.eoffset = 0; |
| 253 | dfibh.sbh = dfibh.ebh = dbh; |
| 254 | while ( (f_pos < size) ) |
| 255 | { |
| 256 | UDF_I_ALLOCTYPE(inode) = ICBTAG_FLAG_AD_IN_ICB; |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 257 | sfi = udf_fileident_read(inode, &f_pos, &sfibh, &cfi, NULL, NULL, NULL, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 258 | if (!sfi) |
| 259 | { |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 260 | brelse(dbh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 261 | return NULL; |
| 262 | } |
| 263 | UDF_I_ALLOCTYPE(inode) = alloctype; |
| 264 | sfi->descTag.tagLocation = cpu_to_le32(*block); |
| 265 | dfibh.soffset = dfibh.eoffset; |
| 266 | dfibh.eoffset += (sfibh.eoffset - sfibh.soffset); |
| 267 | dfi = (struct fileIdentDesc *)(dbh->b_data + dfibh.soffset); |
| 268 | if (udf_write_fi(inode, sfi, dfi, &dfibh, sfi->impUse, |
| 269 | sfi->fileIdent + le16_to_cpu(sfi->lengthOfImpUse))) |
| 270 | { |
| 271 | UDF_I_ALLOCTYPE(inode) = ICBTAG_FLAG_AD_IN_ICB; |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 272 | brelse(dbh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 273 | return NULL; |
| 274 | } |
| 275 | } |
| 276 | mark_buffer_dirty_inode(dbh, inode); |
| 277 | |
| 278 | memset(UDF_I_DATA(inode) + UDF_I_LENEATTR(inode), 0, UDF_I_LENALLOC(inode)); |
| 279 | UDF_I_LENALLOC(inode) = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | eloc.logicalBlockNum = *block; |
| 281 | eloc.partitionReferenceNum = UDF_I_LOCATION(inode).partitionReferenceNum; |
| 282 | elen = inode->i_size; |
| 283 | UDF_I_LENEXTENTS(inode) = elen; |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 284 | epos.bh = NULL; |
| 285 | epos.block = UDF_I_LOCATION(inode); |
| 286 | epos.offset = udf_file_entry_alloc_offset(inode); |
| 287 | udf_add_aext(inode, &epos, eloc, elen, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 288 | /* UniqueID stuff */ |
| 289 | |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 290 | brelse(epos.bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 291 | mark_inode_dirty(inode); |
| 292 | return dbh; |
| 293 | } |
| 294 | |
| 295 | static int udf_get_block(struct inode *inode, sector_t block, struct buffer_head *bh_result, int create) |
| 296 | { |
| 297 | int err, new; |
| 298 | struct buffer_head *bh; |
| 299 | unsigned long phys; |
| 300 | |
| 301 | if (!create) |
| 302 | { |
| 303 | phys = udf_block_map(inode, block); |
| 304 | if (phys) |
| 305 | map_bh(bh_result, inode->i_sb, phys); |
| 306 | return 0; |
| 307 | } |
| 308 | |
| 309 | err = -EIO; |
| 310 | new = 0; |
| 311 | bh = NULL; |
| 312 | |
| 313 | lock_kernel(); |
| 314 | |
| 315 | if (block < 0) |
| 316 | goto abort_negative; |
| 317 | |
| 318 | if (block == UDF_I_NEXT_ALLOC_BLOCK(inode) + 1) |
| 319 | { |
| 320 | UDF_I_NEXT_ALLOC_BLOCK(inode) ++; |
| 321 | UDF_I_NEXT_ALLOC_GOAL(inode) ++; |
| 322 | } |
| 323 | |
| 324 | err = 0; |
| 325 | |
| 326 | bh = inode_getblk(inode, block, &err, &phys, &new); |
Eric Sesterhenn | 2c2111c | 2006-04-02 13:40:13 +0200 | [diff] [blame] | 327 | BUG_ON(bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 328 | if (err) |
| 329 | goto abort; |
Eric Sesterhenn | 2c2111c | 2006-04-02 13:40:13 +0200 | [diff] [blame] | 330 | BUG_ON(!phys); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 331 | |
| 332 | if (new) |
| 333 | set_buffer_new(bh_result); |
| 334 | map_bh(bh_result, inode->i_sb, phys); |
| 335 | abort: |
| 336 | unlock_kernel(); |
| 337 | return err; |
| 338 | |
| 339 | abort_negative: |
| 340 | udf_warning(inode->i_sb, "udf_get_block", "block < 0"); |
| 341 | goto abort; |
| 342 | } |
| 343 | |
| 344 | static struct buffer_head * |
| 345 | udf_getblk(struct inode *inode, long block, int create, int *err) |
| 346 | { |
| 347 | struct buffer_head dummy; |
| 348 | |
| 349 | dummy.b_state = 0; |
| 350 | dummy.b_blocknr = -1000; |
| 351 | *err = udf_get_block(inode, block, &dummy, create); |
| 352 | if (!*err && buffer_mapped(&dummy)) |
| 353 | { |
| 354 | struct buffer_head *bh; |
| 355 | bh = sb_getblk(inode->i_sb, dummy.b_blocknr); |
| 356 | if (buffer_new(&dummy)) |
| 357 | { |
| 358 | lock_buffer(bh); |
| 359 | memset(bh->b_data, 0x00, inode->i_sb->s_blocksize); |
| 360 | set_buffer_uptodate(bh); |
| 361 | unlock_buffer(bh); |
| 362 | mark_buffer_dirty_inode(bh, inode); |
| 363 | } |
| 364 | return bh; |
| 365 | } |
| 366 | return NULL; |
| 367 | } |
| 368 | |
Jan Kara | 31170b6 | 2007-05-08 00:35:21 -0700 | [diff] [blame] | 369 | /* Extend the file by 'blocks' blocks, return the number of extents added */ |
| 370 | int udf_extend_file(struct inode *inode, struct extent_position *last_pos, |
| 371 | kernel_long_ad *last_ext, sector_t blocks) |
| 372 | { |
| 373 | sector_t add; |
| 374 | int count = 0, fake = !(last_ext->extLength & UDF_EXTENT_LENGTH_MASK); |
| 375 | struct super_block *sb = inode->i_sb; |
| 376 | kernel_lb_addr prealloc_loc = {0, 0}; |
| 377 | int prealloc_len = 0; |
| 378 | |
| 379 | /* The previous extent is fake and we should not extend by anything |
| 380 | * - there's nothing to do... */ |
| 381 | if (!blocks && fake) |
| 382 | return 0; |
| 383 | /* Round the last extent up to a multiple of block size */ |
| 384 | if (last_ext->extLength & (sb->s_blocksize - 1)) { |
| 385 | last_ext->extLength = |
| 386 | (last_ext->extLength & UDF_EXTENT_FLAG_MASK) | |
| 387 | (((last_ext->extLength & UDF_EXTENT_LENGTH_MASK) + |
| 388 | sb->s_blocksize - 1) & ~(sb->s_blocksize - 1)); |
| 389 | UDF_I_LENEXTENTS(inode) = |
| 390 | (UDF_I_LENEXTENTS(inode) + sb->s_blocksize - 1) & |
| 391 | ~(sb->s_blocksize - 1); |
| 392 | } |
| 393 | /* Last extent are just preallocated blocks? */ |
| 394 | if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) == EXT_NOT_RECORDED_ALLOCATED) { |
| 395 | /* Save the extent so that we can reattach it to the end */ |
| 396 | prealloc_loc = last_ext->extLocation; |
| 397 | prealloc_len = last_ext->extLength; |
| 398 | /* Mark the extent as a hole */ |
| 399 | last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | |
| 400 | (last_ext->extLength & UDF_EXTENT_LENGTH_MASK); |
| 401 | last_ext->extLocation.logicalBlockNum = 0; |
| 402 | last_ext->extLocation.partitionReferenceNum = 0; |
| 403 | } |
| 404 | /* Can we merge with the previous extent? */ |
| 405 | if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) == EXT_NOT_RECORDED_NOT_ALLOCATED) { |
| 406 | add = ((1<<30) - sb->s_blocksize - (last_ext->extLength & |
| 407 | UDF_EXTENT_LENGTH_MASK)) >> sb->s_blocksize_bits; |
| 408 | if (add > blocks) |
| 409 | add = blocks; |
| 410 | blocks -= add; |
| 411 | last_ext->extLength += add << sb->s_blocksize_bits; |
| 412 | } |
| 413 | |
| 414 | if (fake) { |
| 415 | udf_add_aext(inode, last_pos, last_ext->extLocation, |
| 416 | last_ext->extLength, 1); |
| 417 | count++; |
| 418 | } |
| 419 | else |
| 420 | udf_write_aext(inode, last_pos, last_ext->extLocation, last_ext->extLength, 1); |
| 421 | /* Managed to do everything necessary? */ |
| 422 | if (!blocks) |
| 423 | goto out; |
| 424 | |
| 425 | /* All further extents will be NOT_RECORDED_NOT_ALLOCATED */ |
| 426 | last_ext->extLocation.logicalBlockNum = 0; |
| 427 | last_ext->extLocation.partitionReferenceNum = 0; |
| 428 | add = (1 << (30-sb->s_blocksize_bits)) - 1; |
| 429 | last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | (add << sb->s_blocksize_bits); |
| 430 | /* Create enough extents to cover the whole hole */ |
| 431 | while (blocks > add) { |
| 432 | blocks -= add; |
| 433 | if (udf_add_aext(inode, last_pos, last_ext->extLocation, |
| 434 | last_ext->extLength, 1) == -1) |
| 435 | return -1; |
| 436 | count++; |
| 437 | } |
| 438 | if (blocks) { |
| 439 | last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | |
| 440 | (blocks << sb->s_blocksize_bits); |
| 441 | if (udf_add_aext(inode, last_pos, last_ext->extLocation, |
| 442 | last_ext->extLength, 1) == -1) |
| 443 | return -1; |
| 444 | count++; |
| 445 | } |
| 446 | out: |
| 447 | /* Do we have some preallocated blocks saved? */ |
| 448 | if (prealloc_len) { |
| 449 | if (udf_add_aext(inode, last_pos, prealloc_loc, prealloc_len, 1) == -1) |
| 450 | return -1; |
| 451 | last_ext->extLocation = prealloc_loc; |
| 452 | last_ext->extLength = prealloc_len; |
| 453 | count++; |
| 454 | } |
| 455 | /* last_pos should point to the last written extent... */ |
| 456 | if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_SHORT) |
| 457 | last_pos->offset -= sizeof(short_ad); |
| 458 | else if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_LONG) |
| 459 | last_pos->offset -= sizeof(long_ad); |
| 460 | else |
| 461 | return -1; |
| 462 | return count; |
| 463 | } |
| 464 | |
Jan Kara | 60448b1 | 2007-05-08 00:35:13 -0700 | [diff] [blame] | 465 | static struct buffer_head * inode_getblk(struct inode * inode, sector_t block, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 466 | int *err, long *phys, int *new) |
| 467 | { |
Jan Kara | 31170b6 | 2007-05-08 00:35:21 -0700 | [diff] [blame] | 468 | static sector_t last_block; |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 469 | struct buffer_head *result = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 470 | kernel_long_ad laarr[EXTENT_MERGE_SIZE]; |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 471 | struct extent_position prev_epos, cur_epos, next_epos; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 472 | int count = 0, startnum = 0, endnum = 0; |
Jan Kara | 85d7124 | 2007-06-01 00:46:29 -0700 | [diff] [blame] | 473 | uint32_t elen = 0, tmpelen; |
| 474 | kernel_lb_addr eloc, tmpeloc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 475 | int c = 1; |
Jan Kara | 60448b1 | 2007-05-08 00:35:13 -0700 | [diff] [blame] | 476 | loff_t lbcount = 0, b_off = 0; |
| 477 | uint32_t newblocknum, newblock; |
| 478 | sector_t offset = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 479 | int8_t etype; |
| 480 | int goal = 0, pgoal = UDF_I_LOCATION(inode).logicalBlockNum; |
Jan Kara | 31170b6 | 2007-05-08 00:35:21 -0700 | [diff] [blame] | 481 | int lastblock = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 482 | |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 483 | prev_epos.offset = udf_file_entry_alloc_offset(inode); |
| 484 | prev_epos.block = UDF_I_LOCATION(inode); |
| 485 | prev_epos.bh = NULL; |
| 486 | cur_epos = next_epos = prev_epos; |
Jan Kara | 60448b1 | 2007-05-08 00:35:13 -0700 | [diff] [blame] | 487 | b_off = (loff_t)block << inode->i_sb->s_blocksize_bits; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 488 | |
| 489 | /* find the extent which contains the block we are looking for. |
| 490 | alternate between laarr[0] and laarr[1] for locations of the |
| 491 | current extent, and the previous extent */ |
| 492 | do |
| 493 | { |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 494 | if (prev_epos.bh != cur_epos.bh) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 495 | { |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 496 | brelse(prev_epos.bh); |
| 497 | get_bh(cur_epos.bh); |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 498 | prev_epos.bh = cur_epos.bh; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 499 | } |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 500 | if (cur_epos.bh != next_epos.bh) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 501 | { |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 502 | brelse(cur_epos.bh); |
| 503 | get_bh(next_epos.bh); |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 504 | cur_epos.bh = next_epos.bh; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 505 | } |
| 506 | |
| 507 | lbcount += elen; |
| 508 | |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 509 | prev_epos.block = cur_epos.block; |
| 510 | cur_epos.block = next_epos.block; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 511 | |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 512 | prev_epos.offset = cur_epos.offset; |
| 513 | cur_epos.offset = next_epos.offset; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 514 | |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 515 | if ((etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 1)) == -1) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 516 | break; |
| 517 | |
| 518 | c = !c; |
| 519 | |
| 520 | laarr[c].extLength = (etype << 30) | elen; |
| 521 | laarr[c].extLocation = eloc; |
| 522 | |
| 523 | if (etype != (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) |
| 524 | pgoal = eloc.logicalBlockNum + |
| 525 | ((elen + inode->i_sb->s_blocksize - 1) >> |
| 526 | inode->i_sb->s_blocksize_bits); |
| 527 | |
| 528 | count ++; |
| 529 | } while (lbcount + elen <= b_off); |
| 530 | |
| 531 | b_off -= lbcount; |
| 532 | offset = b_off >> inode->i_sb->s_blocksize_bits; |
Jan Kara | 85d7124 | 2007-06-01 00:46:29 -0700 | [diff] [blame] | 533 | /* |
| 534 | * Move prev_epos and cur_epos into indirect extent if we are at |
| 535 | * the pointer to it |
| 536 | */ |
| 537 | udf_next_aext(inode, &prev_epos, &tmpeloc, &tmpelen, 0); |
| 538 | udf_next_aext(inode, &cur_epos, &tmpeloc, &tmpelen, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 539 | |
| 540 | /* if the extent is allocated and recorded, return the block |
| 541 | if the extent is not a multiple of the blocksize, round up */ |
| 542 | |
| 543 | if (etype == (EXT_RECORDED_ALLOCATED >> 30)) |
| 544 | { |
| 545 | if (elen & (inode->i_sb->s_blocksize - 1)) |
| 546 | { |
| 547 | elen = EXT_RECORDED_ALLOCATED | |
| 548 | ((elen + inode->i_sb->s_blocksize - 1) & |
| 549 | ~(inode->i_sb->s_blocksize - 1)); |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 550 | etype = udf_write_aext(inode, &cur_epos, eloc, elen, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 551 | } |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 552 | brelse(prev_epos.bh); |
| 553 | brelse(cur_epos.bh); |
| 554 | brelse(next_epos.bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 555 | newblock = udf_get_lb_pblock(inode->i_sb, eloc, offset); |
| 556 | *phys = newblock; |
| 557 | return NULL; |
| 558 | } |
| 559 | |
Jan Kara | 31170b6 | 2007-05-08 00:35:21 -0700 | [diff] [blame] | 560 | last_block = block; |
| 561 | /* Are we beyond EOF? */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 562 | if (etype == -1) |
| 563 | { |
Jan Kara | 31170b6 | 2007-05-08 00:35:21 -0700 | [diff] [blame] | 564 | int ret; |
| 565 | |
| 566 | if (count) { |
| 567 | if (c) |
| 568 | laarr[0] = laarr[1]; |
| 569 | startnum = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 570 | } |
Jan Kara | 31170b6 | 2007-05-08 00:35:21 -0700 | [diff] [blame] | 571 | else { |
| 572 | /* Create a fake extent when there's not one */ |
| 573 | memset(&laarr[0].extLocation, 0x00, sizeof(kernel_lb_addr)); |
| 574 | laarr[0].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED; |
| 575 | /* Will udf_extend_file() create real extent from a fake one? */ |
| 576 | startnum = (offset > 0); |
| 577 | } |
| 578 | /* Create extents for the hole between EOF and offset */ |
| 579 | ret = udf_extend_file(inode, &prev_epos, laarr, offset); |
| 580 | if (ret == -1) { |
| 581 | brelse(prev_epos.bh); |
| 582 | brelse(cur_epos.bh); |
| 583 | brelse(next_epos.bh); |
| 584 | /* We don't really know the error here so we just make |
| 585 | * something up */ |
| 586 | *err = -ENOSPC; |
| 587 | return NULL; |
| 588 | } |
| 589 | c = 0; |
| 590 | offset = 0; |
| 591 | count += ret; |
| 592 | /* We are not covered by a preallocated extent? */ |
| 593 | if ((laarr[0].extLength & UDF_EXTENT_FLAG_MASK) != EXT_NOT_RECORDED_ALLOCATED) { |
| 594 | /* Is there any real extent? - otherwise we overwrite |
| 595 | * the fake one... */ |
| 596 | if (count) |
| 597 | c = !c; |
| 598 | laarr[c].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | |
| 599 | inode->i_sb->s_blocksize; |
| 600 | memset(&laarr[c].extLocation, 0x00, sizeof(kernel_lb_addr)); |
| 601 | count ++; |
| 602 | endnum ++; |
| 603 | } |
| 604 | endnum = c+1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 605 | lastblock = 1; |
| 606 | } |
Jan Kara | 31170b6 | 2007-05-08 00:35:21 -0700 | [diff] [blame] | 607 | else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 608 | endnum = startnum = ((count > 2) ? 2 : count); |
| 609 | |
Jan Kara | 31170b6 | 2007-05-08 00:35:21 -0700 | [diff] [blame] | 610 | /* if the current extent is in position 0, swap it with the previous */ |
| 611 | if (!c && count != 1) |
| 612 | { |
| 613 | laarr[2] = laarr[0]; |
| 614 | laarr[0] = laarr[1]; |
| 615 | laarr[1] = laarr[2]; |
| 616 | c = 1; |
| 617 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 618 | |
Jan Kara | 31170b6 | 2007-05-08 00:35:21 -0700 | [diff] [blame] | 619 | /* if the current block is located in an extent, read the next extent */ |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 620 | if ((etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 0)) != -1) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 621 | { |
| 622 | laarr[c+1].extLength = (etype << 30) | elen; |
| 623 | laarr[c+1].extLocation = eloc; |
| 624 | count ++; |
| 625 | startnum ++; |
| 626 | endnum ++; |
| 627 | } |
Jan Kara | 31170b6 | 2007-05-08 00:35:21 -0700 | [diff] [blame] | 628 | else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 629 | lastblock = 1; |
Jan Kara | 31170b6 | 2007-05-08 00:35:21 -0700 | [diff] [blame] | 630 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 631 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 632 | |
| 633 | /* if the current extent is not recorded but allocated, get the |
| 634 | block in the extent corresponding to the requested block */ |
| 635 | if ((laarr[c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30)) |
| 636 | newblocknum = laarr[c].extLocation.logicalBlockNum + offset; |
| 637 | else /* otherwise, allocate a new block */ |
| 638 | { |
| 639 | if (UDF_I_NEXT_ALLOC_BLOCK(inode) == block) |
| 640 | goal = UDF_I_NEXT_ALLOC_GOAL(inode); |
| 641 | |
| 642 | if (!goal) |
| 643 | { |
| 644 | if (!(goal = pgoal)) |
| 645 | goal = UDF_I_LOCATION(inode).logicalBlockNum + 1; |
| 646 | } |
| 647 | |
| 648 | if (!(newblocknum = udf_new_block(inode->i_sb, inode, |
| 649 | UDF_I_LOCATION(inode).partitionReferenceNum, goal, err))) |
| 650 | { |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 651 | brelse(prev_epos.bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 652 | *err = -ENOSPC; |
| 653 | return NULL; |
| 654 | } |
| 655 | UDF_I_LENEXTENTS(inode) += inode->i_sb->s_blocksize; |
| 656 | } |
| 657 | |
| 658 | /* if the extent the requsted block is located in contains multiple blocks, |
| 659 | split the extent into at most three extents. blocks prior to requested |
| 660 | block, requested block, and blocks after requested block */ |
| 661 | udf_split_extents(inode, &c, offset, newblocknum, laarr, &endnum); |
| 662 | |
| 663 | #ifdef UDF_PREALLOCATE |
| 664 | /* preallocate blocks */ |
| 665 | udf_prealloc_extents(inode, c, lastblock, laarr, &endnum); |
| 666 | #endif |
| 667 | |
| 668 | /* merge any continuous blocks in laarr */ |
| 669 | udf_merge_extents(inode, laarr, &endnum); |
| 670 | |
| 671 | /* write back the new extents, inserting new extents if the new number |
Jan Kara | 31170b6 | 2007-05-08 00:35:21 -0700 | [diff] [blame] | 672 | of extents is greater than the old number, and deleting extents if |
| 673 | the new number of extents is less than the old number */ |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 674 | udf_update_extents(inode, laarr, startnum, endnum, &prev_epos); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 675 | |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 676 | brelse(prev_epos.bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 677 | |
| 678 | if (!(newblock = udf_get_pblock(inode->i_sb, newblocknum, |
| 679 | UDF_I_LOCATION(inode).partitionReferenceNum, 0))) |
| 680 | { |
| 681 | return NULL; |
| 682 | } |
| 683 | *phys = newblock; |
| 684 | *err = 0; |
| 685 | *new = 1; |
| 686 | UDF_I_NEXT_ALLOC_BLOCK(inode) = block; |
| 687 | UDF_I_NEXT_ALLOC_GOAL(inode) = newblocknum; |
| 688 | inode->i_ctime = current_fs_time(inode->i_sb); |
| 689 | |
| 690 | if (IS_SYNC(inode)) |
| 691 | udf_sync_inode(inode); |
| 692 | else |
| 693 | mark_inode_dirty(inode); |
| 694 | return result; |
| 695 | } |
| 696 | |
| 697 | static void udf_split_extents(struct inode *inode, int *c, int offset, int newblocknum, |
| 698 | kernel_long_ad laarr[EXTENT_MERGE_SIZE], int *endnum) |
| 699 | { |
| 700 | if ((laarr[*c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30) || |
| 701 | (laarr[*c].extLength >> 30) == (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) |
| 702 | { |
| 703 | int curr = *c; |
| 704 | int blen = ((laarr[curr].extLength & UDF_EXTENT_LENGTH_MASK) + |
| 705 | inode->i_sb->s_blocksize - 1) >> inode->i_sb->s_blocksize_bits; |
| 706 | int8_t etype = (laarr[curr].extLength >> 30); |
| 707 | |
| 708 | if (blen == 1) |
| 709 | ; |
| 710 | else if (!offset || blen == offset + 1) |
| 711 | { |
| 712 | laarr[curr+2] = laarr[curr+1]; |
| 713 | laarr[curr+1] = laarr[curr]; |
| 714 | } |
| 715 | else |
| 716 | { |
| 717 | laarr[curr+3] = laarr[curr+1]; |
| 718 | laarr[curr+2] = laarr[curr+1] = laarr[curr]; |
| 719 | } |
| 720 | |
| 721 | if (offset) |
| 722 | { |
| 723 | if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30)) |
| 724 | { |
| 725 | udf_free_blocks(inode->i_sb, inode, laarr[curr].extLocation, 0, offset); |
| 726 | laarr[curr].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | |
| 727 | (offset << inode->i_sb->s_blocksize_bits); |
| 728 | laarr[curr].extLocation.logicalBlockNum = 0; |
| 729 | laarr[curr].extLocation.partitionReferenceNum = 0; |
| 730 | } |
| 731 | else |
| 732 | laarr[curr].extLength = (etype << 30) | |
| 733 | (offset << inode->i_sb->s_blocksize_bits); |
| 734 | curr ++; |
| 735 | (*c) ++; |
| 736 | (*endnum) ++; |
| 737 | } |
Cyrill Gorcunov | 647bd61 | 2007-07-15 23:39:47 -0700 | [diff] [blame^] | 738 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 739 | laarr[curr].extLocation.logicalBlockNum = newblocknum; |
| 740 | if (etype == (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) |
| 741 | laarr[curr].extLocation.partitionReferenceNum = |
| 742 | UDF_I_LOCATION(inode).partitionReferenceNum; |
| 743 | laarr[curr].extLength = EXT_RECORDED_ALLOCATED | |
| 744 | inode->i_sb->s_blocksize; |
| 745 | curr ++; |
| 746 | |
| 747 | if (blen != offset + 1) |
| 748 | { |
| 749 | if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30)) |
| 750 | laarr[curr].extLocation.logicalBlockNum += (offset + 1); |
| 751 | laarr[curr].extLength = (etype << 30) | |
| 752 | ((blen - (offset + 1)) << inode->i_sb->s_blocksize_bits); |
| 753 | curr ++; |
| 754 | (*endnum) ++; |
| 755 | } |
| 756 | } |
| 757 | } |
| 758 | |
| 759 | static void udf_prealloc_extents(struct inode *inode, int c, int lastblock, |
| 760 | kernel_long_ad laarr[EXTENT_MERGE_SIZE], int *endnum) |
| 761 | { |
| 762 | int start, length = 0, currlength = 0, i; |
| 763 | |
| 764 | if (*endnum >= (c+1)) |
| 765 | { |
| 766 | if (!lastblock) |
| 767 | return; |
| 768 | else |
| 769 | start = c; |
| 770 | } |
| 771 | else |
| 772 | { |
| 773 | if ((laarr[c+1].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30)) |
| 774 | { |
| 775 | start = c+1; |
| 776 | length = currlength = (((laarr[c+1].extLength & UDF_EXTENT_LENGTH_MASK) + |
| 777 | inode->i_sb->s_blocksize - 1) >> inode->i_sb->s_blocksize_bits); |
| 778 | } |
| 779 | else |
| 780 | start = c; |
| 781 | } |
| 782 | |
| 783 | for (i=start+1; i<=*endnum; i++) |
| 784 | { |
| 785 | if (i == *endnum) |
| 786 | { |
| 787 | if (lastblock) |
| 788 | length += UDF_DEFAULT_PREALLOC_BLOCKS; |
| 789 | } |
| 790 | else if ((laarr[i].extLength >> 30) == (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) |
| 791 | length += (((laarr[i].extLength & UDF_EXTENT_LENGTH_MASK) + |
| 792 | inode->i_sb->s_blocksize - 1) >> inode->i_sb->s_blocksize_bits); |
| 793 | else |
| 794 | break; |
| 795 | } |
| 796 | |
| 797 | if (length) |
| 798 | { |
| 799 | int next = laarr[start].extLocation.logicalBlockNum + |
| 800 | (((laarr[start].extLength & UDF_EXTENT_LENGTH_MASK) + |
| 801 | inode->i_sb->s_blocksize - 1) >> inode->i_sb->s_blocksize_bits); |
| 802 | int numalloc = udf_prealloc_blocks(inode->i_sb, inode, |
| 803 | laarr[start].extLocation.partitionReferenceNum, |
| 804 | next, (UDF_DEFAULT_PREALLOC_BLOCKS > length ? length : |
| 805 | UDF_DEFAULT_PREALLOC_BLOCKS) - currlength); |
| 806 | |
| 807 | if (numalloc) |
| 808 | { |
| 809 | if (start == (c+1)) |
| 810 | laarr[start].extLength += |
| 811 | (numalloc << inode->i_sb->s_blocksize_bits); |
| 812 | else |
| 813 | { |
| 814 | memmove(&laarr[c+2], &laarr[c+1], |
| 815 | sizeof(long_ad) * (*endnum - (c+1))); |
| 816 | (*endnum) ++; |
| 817 | laarr[c+1].extLocation.logicalBlockNum = next; |
| 818 | laarr[c+1].extLocation.partitionReferenceNum = |
| 819 | laarr[c].extLocation.partitionReferenceNum; |
| 820 | laarr[c+1].extLength = EXT_NOT_RECORDED_ALLOCATED | |
| 821 | (numalloc << inode->i_sb->s_blocksize_bits); |
| 822 | start = c+1; |
| 823 | } |
| 824 | |
| 825 | for (i=start+1; numalloc && i<*endnum; i++) |
| 826 | { |
| 827 | int elen = ((laarr[i].extLength & UDF_EXTENT_LENGTH_MASK) + |
| 828 | inode->i_sb->s_blocksize - 1) >> inode->i_sb->s_blocksize_bits; |
| 829 | |
| 830 | if (elen > numalloc) |
| 831 | { |
| 832 | laarr[i].extLength -= |
| 833 | (numalloc << inode->i_sb->s_blocksize_bits); |
| 834 | numalloc = 0; |
| 835 | } |
| 836 | else |
| 837 | { |
| 838 | numalloc -= elen; |
| 839 | if (*endnum > (i+1)) |
Cyrill Gorcunov | 647bd61 | 2007-07-15 23:39:47 -0700 | [diff] [blame^] | 840 | memmove(&laarr[i], &laarr[i+1], |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 841 | sizeof(long_ad) * (*endnum - (i+1))); |
| 842 | i --; |
| 843 | (*endnum) --; |
| 844 | } |
| 845 | } |
| 846 | UDF_I_LENEXTENTS(inode) += numalloc << inode->i_sb->s_blocksize_bits; |
| 847 | } |
| 848 | } |
| 849 | } |
| 850 | |
| 851 | static void udf_merge_extents(struct inode *inode, |
| 852 | kernel_long_ad laarr[EXTENT_MERGE_SIZE], int *endnum) |
| 853 | { |
| 854 | int i; |
| 855 | |
| 856 | for (i=0; i<(*endnum-1); i++) |
| 857 | { |
| 858 | if ((laarr[i].extLength >> 30) == (laarr[i+1].extLength >> 30)) |
| 859 | { |
| 860 | if (((laarr[i].extLength >> 30) == (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) || |
| 861 | ((laarr[i+1].extLocation.logicalBlockNum - laarr[i].extLocation.logicalBlockNum) == |
| 862 | (((laarr[i].extLength & UDF_EXTENT_LENGTH_MASK) + |
| 863 | inode->i_sb->s_blocksize - 1) >> inode->i_sb->s_blocksize_bits))) |
| 864 | { |
| 865 | if (((laarr[i].extLength & UDF_EXTENT_LENGTH_MASK) + |
| 866 | (laarr[i+1].extLength & UDF_EXTENT_LENGTH_MASK) + |
| 867 | inode->i_sb->s_blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) |
| 868 | { |
| 869 | laarr[i+1].extLength = (laarr[i+1].extLength - |
| 870 | (laarr[i].extLength & UDF_EXTENT_LENGTH_MASK) + |
| 871 | UDF_EXTENT_LENGTH_MASK) & ~(inode->i_sb->s_blocksize-1); |
| 872 | laarr[i].extLength = (laarr[i].extLength & UDF_EXTENT_FLAG_MASK) + |
| 873 | (UDF_EXTENT_LENGTH_MASK + 1) - inode->i_sb->s_blocksize; |
| 874 | laarr[i+1].extLocation.logicalBlockNum = |
| 875 | laarr[i].extLocation.logicalBlockNum + |
| 876 | ((laarr[i].extLength & UDF_EXTENT_LENGTH_MASK) >> |
| 877 | inode->i_sb->s_blocksize_bits); |
| 878 | } |
| 879 | else |
| 880 | { |
| 881 | laarr[i].extLength = laarr[i+1].extLength + |
| 882 | (((laarr[i].extLength & UDF_EXTENT_LENGTH_MASK) + |
| 883 | inode->i_sb->s_blocksize - 1) & ~(inode->i_sb->s_blocksize-1)); |
| 884 | if (*endnum > (i+2)) |
| 885 | memmove(&laarr[i+1], &laarr[i+2], |
| 886 | sizeof(long_ad) * (*endnum - (i+2))); |
| 887 | i --; |
| 888 | (*endnum) --; |
| 889 | } |
| 890 | } |
| 891 | } |
| 892 | else if (((laarr[i].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30)) && |
| 893 | ((laarr[i+1].extLength >> 30) == (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))) |
| 894 | { |
| 895 | udf_free_blocks(inode->i_sb, inode, laarr[i].extLocation, 0, |
| 896 | ((laarr[i].extLength & UDF_EXTENT_LENGTH_MASK) + |
| 897 | inode->i_sb->s_blocksize - 1) >> inode->i_sb->s_blocksize_bits); |
| 898 | laarr[i].extLocation.logicalBlockNum = 0; |
| 899 | laarr[i].extLocation.partitionReferenceNum = 0; |
| 900 | |
| 901 | if (((laarr[i].extLength & UDF_EXTENT_LENGTH_MASK) + |
| 902 | (laarr[i+1].extLength & UDF_EXTENT_LENGTH_MASK) + |
| 903 | inode->i_sb->s_blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) |
| 904 | { |
| 905 | laarr[i+1].extLength = (laarr[i+1].extLength - |
| 906 | (laarr[i].extLength & UDF_EXTENT_LENGTH_MASK) + |
| 907 | UDF_EXTENT_LENGTH_MASK) & ~(inode->i_sb->s_blocksize-1); |
| 908 | laarr[i].extLength = (laarr[i].extLength & UDF_EXTENT_FLAG_MASK) + |
| 909 | (UDF_EXTENT_LENGTH_MASK + 1) - inode->i_sb->s_blocksize; |
| 910 | } |
| 911 | else |
| 912 | { |
| 913 | laarr[i].extLength = laarr[i+1].extLength + |
| 914 | (((laarr[i].extLength & UDF_EXTENT_LENGTH_MASK) + |
| 915 | inode->i_sb->s_blocksize - 1) & ~(inode->i_sb->s_blocksize-1)); |
| 916 | if (*endnum > (i+2)) |
| 917 | memmove(&laarr[i+1], &laarr[i+2], |
| 918 | sizeof(long_ad) * (*endnum - (i+2))); |
| 919 | i --; |
| 920 | (*endnum) --; |
| 921 | } |
| 922 | } |
| 923 | else if ((laarr[i].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30)) |
| 924 | { |
| 925 | udf_free_blocks(inode->i_sb, inode, laarr[i].extLocation, 0, |
| 926 | ((laarr[i].extLength & UDF_EXTENT_LENGTH_MASK) + |
| 927 | inode->i_sb->s_blocksize - 1) >> inode->i_sb->s_blocksize_bits); |
| 928 | laarr[i].extLocation.logicalBlockNum = 0; |
| 929 | laarr[i].extLocation.partitionReferenceNum = 0; |
| 930 | laarr[i].extLength = (laarr[i].extLength & UDF_EXTENT_LENGTH_MASK) | |
| 931 | EXT_NOT_RECORDED_NOT_ALLOCATED; |
| 932 | } |
| 933 | } |
| 934 | } |
| 935 | |
| 936 | static void udf_update_extents(struct inode *inode, |
| 937 | kernel_long_ad laarr[EXTENT_MERGE_SIZE], int startnum, int endnum, |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 938 | struct extent_position *epos) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 939 | { |
| 940 | int start = 0, i; |
| 941 | kernel_lb_addr tmploc; |
| 942 | uint32_t tmplen; |
| 943 | |
| 944 | if (startnum > endnum) |
| 945 | { |
| 946 | for (i=0; i<(startnum-endnum); i++) |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 947 | udf_delete_aext(inode, *epos, laarr[i].extLocation, |
| 948 | laarr[i].extLength); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 949 | } |
| 950 | else if (startnum < endnum) |
| 951 | { |
| 952 | for (i=0; i<(endnum-startnum); i++) |
| 953 | { |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 954 | udf_insert_aext(inode, *epos, laarr[i].extLocation, |
| 955 | laarr[i].extLength); |
| 956 | udf_next_aext(inode, epos, &laarr[i].extLocation, |
| 957 | &laarr[i].extLength, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 958 | start ++; |
| 959 | } |
| 960 | } |
| 961 | |
| 962 | for (i=start; i<endnum; i++) |
| 963 | { |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 964 | udf_next_aext(inode, epos, &tmploc, &tmplen, 0); |
| 965 | udf_write_aext(inode, epos, laarr[i].extLocation, |
| 966 | laarr[i].extLength, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 967 | } |
| 968 | } |
| 969 | |
| 970 | struct buffer_head * udf_bread(struct inode * inode, int block, |
| 971 | int create, int * err) |
| 972 | { |
| 973 | struct buffer_head * bh = NULL; |
| 974 | |
| 975 | bh = udf_getblk(inode, block, create, err); |
| 976 | if (!bh) |
| 977 | return NULL; |
| 978 | |
| 979 | if (buffer_uptodate(bh)) |
| 980 | return bh; |
| 981 | ll_rw_block(READ, 1, &bh); |
| 982 | wait_on_buffer(bh); |
| 983 | if (buffer_uptodate(bh)) |
| 984 | return bh; |
| 985 | brelse(bh); |
| 986 | *err = -EIO; |
| 987 | return NULL; |
| 988 | } |
| 989 | |
| 990 | void udf_truncate(struct inode * inode) |
| 991 | { |
| 992 | int offset; |
| 993 | int err; |
| 994 | |
| 995 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || |
| 996 | S_ISLNK(inode->i_mode))) |
| 997 | return; |
| 998 | if (IS_APPEND(inode) || IS_IMMUTABLE(inode)) |
| 999 | return; |
| 1000 | |
| 1001 | lock_kernel(); |
| 1002 | if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_IN_ICB) |
| 1003 | { |
| 1004 | if (inode->i_sb->s_blocksize < (udf_file_entry_alloc_offset(inode) + |
| 1005 | inode->i_size)) |
| 1006 | { |
| 1007 | udf_expand_file_adinicb(inode, inode->i_size, &err); |
| 1008 | if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_IN_ICB) |
| 1009 | { |
| 1010 | inode->i_size = UDF_I_LENALLOC(inode); |
| 1011 | unlock_kernel(); |
| 1012 | return; |
| 1013 | } |
| 1014 | else |
| 1015 | udf_truncate_extents(inode); |
| 1016 | } |
| 1017 | else |
| 1018 | { |
| 1019 | offset = inode->i_size & (inode->i_sb->s_blocksize - 1); |
| 1020 | memset(UDF_I_DATA(inode) + UDF_I_LENEATTR(inode) + offset, 0x00, inode->i_sb->s_blocksize - offset - udf_file_entry_alloc_offset(inode)); |
| 1021 | UDF_I_LENALLOC(inode) = inode->i_size; |
| 1022 | } |
| 1023 | } |
| 1024 | else |
| 1025 | { |
| 1026 | block_truncate_page(inode->i_mapping, inode->i_size, udf_get_block); |
| 1027 | udf_truncate_extents(inode); |
Cyrill Gorcunov | 647bd61 | 2007-07-15 23:39:47 -0700 | [diff] [blame^] | 1028 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1029 | |
| 1030 | inode->i_mtime = inode->i_ctime = current_fs_time(inode->i_sb); |
| 1031 | if (IS_SYNC(inode)) |
| 1032 | udf_sync_inode (inode); |
| 1033 | else |
| 1034 | mark_inode_dirty(inode); |
| 1035 | unlock_kernel(); |
| 1036 | } |
| 1037 | |
| 1038 | static void |
| 1039 | __udf_read_inode(struct inode *inode) |
| 1040 | { |
| 1041 | struct buffer_head *bh = NULL; |
| 1042 | struct fileEntry *fe; |
| 1043 | uint16_t ident; |
| 1044 | |
| 1045 | /* |
| 1046 | * Set defaults, but the inode is still incomplete! |
| 1047 | * Note: get_new_inode() sets the following on a new inode: |
| 1048 | * i_sb = sb |
| 1049 | * i_no = ino |
| 1050 | * i_flags = sb->s_flags |
| 1051 | * i_state = 0 |
| 1052 | * clean_inode(): zero fills and sets |
| 1053 | * i_count = 1 |
| 1054 | * i_nlink = 1 |
| 1055 | * i_op = NULL; |
| 1056 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1057 | bh = udf_read_ptagged(inode->i_sb, UDF_I_LOCATION(inode), 0, &ident); |
| 1058 | |
| 1059 | if (!bh) |
| 1060 | { |
| 1061 | printk(KERN_ERR "udf: udf_read_inode(ino %ld) failed !bh\n", |
| 1062 | inode->i_ino); |
| 1063 | make_bad_inode(inode); |
| 1064 | return; |
| 1065 | } |
| 1066 | |
| 1067 | if (ident != TAG_IDENT_FE && ident != TAG_IDENT_EFE && |
| 1068 | ident != TAG_IDENT_USE) |
| 1069 | { |
| 1070 | printk(KERN_ERR "udf: udf_read_inode(ino %ld) failed ident=%d\n", |
| 1071 | inode->i_ino, ident); |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 1072 | brelse(bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1073 | make_bad_inode(inode); |
| 1074 | return; |
| 1075 | } |
| 1076 | |
| 1077 | fe = (struct fileEntry *)bh->b_data; |
| 1078 | |
| 1079 | if (le16_to_cpu(fe->icbTag.strategyType) == 4096) |
| 1080 | { |
| 1081 | struct buffer_head *ibh = NULL, *nbh = NULL; |
| 1082 | struct indirectEntry *ie; |
| 1083 | |
| 1084 | ibh = udf_read_ptagged(inode->i_sb, UDF_I_LOCATION(inode), 1, &ident); |
| 1085 | if (ident == TAG_IDENT_IE) |
| 1086 | { |
| 1087 | if (ibh) |
| 1088 | { |
| 1089 | kernel_lb_addr loc; |
| 1090 | ie = (struct indirectEntry *)ibh->b_data; |
Cyrill Gorcunov | 647bd61 | 2007-07-15 23:39:47 -0700 | [diff] [blame^] | 1091 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1092 | loc = lelb_to_cpu(ie->indirectICB.extLocation); |
Cyrill Gorcunov | 647bd61 | 2007-07-15 23:39:47 -0700 | [diff] [blame^] | 1093 | |
| 1094 | if (ie->indirectICB.extLength && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1095 | (nbh = udf_read_ptagged(inode->i_sb, loc, 0, &ident))) |
| 1096 | { |
| 1097 | if (ident == TAG_IDENT_FE || |
| 1098 | ident == TAG_IDENT_EFE) |
| 1099 | { |
| 1100 | memcpy(&UDF_I_LOCATION(inode), &loc, sizeof(kernel_lb_addr)); |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 1101 | brelse(bh); |
| 1102 | brelse(ibh); |
| 1103 | brelse(nbh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1104 | __udf_read_inode(inode); |
| 1105 | return; |
| 1106 | } |
| 1107 | else |
| 1108 | { |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 1109 | brelse(nbh); |
| 1110 | brelse(ibh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1111 | } |
| 1112 | } |
| 1113 | else |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 1114 | brelse(ibh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1115 | } |
| 1116 | } |
| 1117 | else |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 1118 | brelse(ibh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1119 | } |
| 1120 | else if (le16_to_cpu(fe->icbTag.strategyType) != 4) |
| 1121 | { |
| 1122 | printk(KERN_ERR "udf: unsupported strategy type: %d\n", |
| 1123 | le16_to_cpu(fe->icbTag.strategyType)); |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 1124 | brelse(bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1125 | make_bad_inode(inode); |
| 1126 | return; |
| 1127 | } |
| 1128 | udf_fill_inode(inode, bh); |
Jan Kara | 31170b6 | 2007-05-08 00:35:21 -0700 | [diff] [blame] | 1129 | |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 1130 | brelse(bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1131 | } |
| 1132 | |
| 1133 | static void udf_fill_inode(struct inode *inode, struct buffer_head *bh) |
| 1134 | { |
| 1135 | struct fileEntry *fe; |
| 1136 | struct extendedFileEntry *efe; |
| 1137 | time_t convtime; |
| 1138 | long convtime_usec; |
| 1139 | int offset; |
| 1140 | |
| 1141 | fe = (struct fileEntry *)bh->b_data; |
| 1142 | efe = (struct extendedFileEntry *)bh->b_data; |
| 1143 | |
| 1144 | if (le16_to_cpu(fe->icbTag.strategyType) == 4) |
| 1145 | UDF_I_STRAT4096(inode) = 0; |
| 1146 | else /* if (le16_to_cpu(fe->icbTag.strategyType) == 4096) */ |
| 1147 | UDF_I_STRAT4096(inode) = 1; |
| 1148 | |
| 1149 | UDF_I_ALLOCTYPE(inode) = le16_to_cpu(fe->icbTag.flags) & ICBTAG_FLAG_AD_MASK; |
| 1150 | UDF_I_UNIQUE(inode) = 0; |
| 1151 | UDF_I_LENEATTR(inode) = 0; |
| 1152 | UDF_I_LENEXTENTS(inode) = 0; |
| 1153 | UDF_I_LENALLOC(inode) = 0; |
| 1154 | UDF_I_NEXT_ALLOC_BLOCK(inode) = 0; |
| 1155 | UDF_I_NEXT_ALLOC_GOAL(inode) = 0; |
| 1156 | if (le16_to_cpu(fe->descTag.tagIdent) == TAG_IDENT_EFE) |
| 1157 | { |
| 1158 | UDF_I_EFE(inode) = 1; |
| 1159 | UDF_I_USE(inode) = 0; |
Cyrill Gorcunov | 647bd61 | 2007-07-15 23:39:47 -0700 | [diff] [blame^] | 1160 | if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize - sizeof(struct extendedFileEntry))) |
| 1161 | { |
| 1162 | make_bad_inode(inode); |
| 1163 | return; |
| 1164 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1165 | memcpy(UDF_I_DATA(inode), bh->b_data + sizeof(struct extendedFileEntry), inode->i_sb->s_blocksize - sizeof(struct extendedFileEntry)); |
| 1166 | } |
| 1167 | else if (le16_to_cpu(fe->descTag.tagIdent) == TAG_IDENT_FE) |
| 1168 | { |
| 1169 | UDF_I_EFE(inode) = 0; |
| 1170 | UDF_I_USE(inode) = 0; |
Cyrill Gorcunov | 647bd61 | 2007-07-15 23:39:47 -0700 | [diff] [blame^] | 1171 | if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize - sizeof(struct fileEntry))) |
| 1172 | { |
| 1173 | make_bad_inode(inode); |
| 1174 | return; |
| 1175 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1176 | memcpy(UDF_I_DATA(inode), bh->b_data + sizeof(struct fileEntry), inode->i_sb->s_blocksize - sizeof(struct fileEntry)); |
| 1177 | } |
| 1178 | else if (le16_to_cpu(fe->descTag.tagIdent) == TAG_IDENT_USE) |
| 1179 | { |
| 1180 | UDF_I_EFE(inode) = 0; |
| 1181 | UDF_I_USE(inode) = 1; |
| 1182 | UDF_I_LENALLOC(inode) = |
| 1183 | le32_to_cpu( |
| 1184 | ((struct unallocSpaceEntry *)bh->b_data)->lengthAllocDescs); |
Cyrill Gorcunov | 647bd61 | 2007-07-15 23:39:47 -0700 | [diff] [blame^] | 1185 | if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize - sizeof(struct unallocSpaceEntry))) |
| 1186 | { |
| 1187 | make_bad_inode(inode); |
| 1188 | return; |
| 1189 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1190 | memcpy(UDF_I_DATA(inode), bh->b_data + sizeof(struct unallocSpaceEntry), inode->i_sb->s_blocksize - sizeof(struct unallocSpaceEntry)); |
| 1191 | return; |
| 1192 | } |
| 1193 | |
| 1194 | inode->i_uid = le32_to_cpu(fe->uid); |
Phillip Susi | 4d6660e | 2006-03-07 21:55:24 -0800 | [diff] [blame] | 1195 | if (inode->i_uid == -1 || UDF_QUERY_FLAG(inode->i_sb, |
| 1196 | UDF_FLAG_UID_IGNORE)) |
| 1197 | inode->i_uid = UDF_SB(inode->i_sb)->s_uid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1198 | |
| 1199 | inode->i_gid = le32_to_cpu(fe->gid); |
Phillip Susi | 4d6660e | 2006-03-07 21:55:24 -0800 | [diff] [blame] | 1200 | if (inode->i_gid == -1 || UDF_QUERY_FLAG(inode->i_sb, |
| 1201 | UDF_FLAG_GID_IGNORE)) |
| 1202 | inode->i_gid = UDF_SB(inode->i_sb)->s_gid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1203 | |
| 1204 | inode->i_nlink = le16_to_cpu(fe->fileLinkCount); |
| 1205 | if (!inode->i_nlink) |
| 1206 | inode->i_nlink = 1; |
Cyrill Gorcunov | 647bd61 | 2007-07-15 23:39:47 -0700 | [diff] [blame^] | 1207 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1208 | inode->i_size = le64_to_cpu(fe->informationLength); |
| 1209 | UDF_I_LENEXTENTS(inode) = inode->i_size; |
| 1210 | |
| 1211 | inode->i_mode = udf_convert_permissions(fe); |
| 1212 | inode->i_mode &= ~UDF_SB(inode->i_sb)->s_umask; |
| 1213 | |
| 1214 | if (UDF_I_EFE(inode) == 0) |
| 1215 | { |
| 1216 | inode->i_blocks = le64_to_cpu(fe->logicalBlocksRecorded) << |
| 1217 | (inode->i_sb->s_blocksize_bits - 9); |
| 1218 | |
| 1219 | if ( udf_stamp_to_time(&convtime, &convtime_usec, |
| 1220 | lets_to_cpu(fe->accessTime)) ) |
| 1221 | { |
| 1222 | inode->i_atime.tv_sec = convtime; |
| 1223 | inode->i_atime.tv_nsec = convtime_usec * 1000; |
| 1224 | } |
| 1225 | else |
| 1226 | { |
| 1227 | inode->i_atime = UDF_SB_RECORDTIME(inode->i_sb); |
| 1228 | } |
| 1229 | |
| 1230 | if ( udf_stamp_to_time(&convtime, &convtime_usec, |
| 1231 | lets_to_cpu(fe->modificationTime)) ) |
| 1232 | { |
| 1233 | inode->i_mtime.tv_sec = convtime; |
| 1234 | inode->i_mtime.tv_nsec = convtime_usec * 1000; |
| 1235 | } |
| 1236 | else |
| 1237 | { |
| 1238 | inode->i_mtime = UDF_SB_RECORDTIME(inode->i_sb); |
| 1239 | } |
| 1240 | |
| 1241 | if ( udf_stamp_to_time(&convtime, &convtime_usec, |
| 1242 | lets_to_cpu(fe->attrTime)) ) |
| 1243 | { |
| 1244 | inode->i_ctime.tv_sec = convtime; |
| 1245 | inode->i_ctime.tv_nsec = convtime_usec * 1000; |
| 1246 | } |
| 1247 | else |
| 1248 | { |
| 1249 | inode->i_ctime = UDF_SB_RECORDTIME(inode->i_sb); |
| 1250 | } |
| 1251 | |
| 1252 | UDF_I_UNIQUE(inode) = le64_to_cpu(fe->uniqueID); |
| 1253 | UDF_I_LENEATTR(inode) = le32_to_cpu(fe->lengthExtendedAttr); |
| 1254 | UDF_I_LENALLOC(inode) = le32_to_cpu(fe->lengthAllocDescs); |
| 1255 | offset = sizeof(struct fileEntry) + UDF_I_LENEATTR(inode); |
| 1256 | } |
| 1257 | else |
| 1258 | { |
Cyrill Gorcunov | 647bd61 | 2007-07-15 23:39:47 -0700 | [diff] [blame^] | 1259 | inode->i_blocks = le64_to_cpu(efe->logicalBlocksRecorded) << |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1260 | (inode->i_sb->s_blocksize_bits - 9); |
| 1261 | |
| 1262 | if ( udf_stamp_to_time(&convtime, &convtime_usec, |
| 1263 | lets_to_cpu(efe->accessTime)) ) |
| 1264 | { |
| 1265 | inode->i_atime.tv_sec = convtime; |
| 1266 | inode->i_atime.tv_nsec = convtime_usec * 1000; |
| 1267 | } |
| 1268 | else |
| 1269 | { |
| 1270 | inode->i_atime = UDF_SB_RECORDTIME(inode->i_sb); |
| 1271 | } |
| 1272 | |
| 1273 | if ( udf_stamp_to_time(&convtime, &convtime_usec, |
| 1274 | lets_to_cpu(efe->modificationTime)) ) |
| 1275 | { |
| 1276 | inode->i_mtime.tv_sec = convtime; |
| 1277 | inode->i_mtime.tv_nsec = convtime_usec * 1000; |
| 1278 | } |
| 1279 | else |
| 1280 | { |
| 1281 | inode->i_mtime = UDF_SB_RECORDTIME(inode->i_sb); |
| 1282 | } |
| 1283 | |
| 1284 | if ( udf_stamp_to_time(&convtime, &convtime_usec, |
| 1285 | lets_to_cpu(efe->createTime)) ) |
| 1286 | { |
| 1287 | UDF_I_CRTIME(inode).tv_sec = convtime; |
| 1288 | UDF_I_CRTIME(inode).tv_nsec = convtime_usec * 1000; |
| 1289 | } |
| 1290 | else |
| 1291 | { |
| 1292 | UDF_I_CRTIME(inode) = UDF_SB_RECORDTIME(inode->i_sb); |
| 1293 | } |
| 1294 | |
| 1295 | if ( udf_stamp_to_time(&convtime, &convtime_usec, |
| 1296 | lets_to_cpu(efe->attrTime)) ) |
| 1297 | { |
| 1298 | inode->i_ctime.tv_sec = convtime; |
| 1299 | inode->i_ctime.tv_nsec = convtime_usec * 1000; |
| 1300 | } |
| 1301 | else |
| 1302 | { |
| 1303 | inode->i_ctime = UDF_SB_RECORDTIME(inode->i_sb); |
| 1304 | } |
| 1305 | |
| 1306 | UDF_I_UNIQUE(inode) = le64_to_cpu(efe->uniqueID); |
| 1307 | UDF_I_LENEATTR(inode) = le32_to_cpu(efe->lengthExtendedAttr); |
| 1308 | UDF_I_LENALLOC(inode) = le32_to_cpu(efe->lengthAllocDescs); |
| 1309 | offset = sizeof(struct extendedFileEntry) + UDF_I_LENEATTR(inode); |
| 1310 | } |
| 1311 | |
| 1312 | switch (fe->icbTag.fileType) |
| 1313 | { |
| 1314 | case ICBTAG_FILE_TYPE_DIRECTORY: |
| 1315 | { |
| 1316 | inode->i_op = &udf_dir_inode_operations; |
| 1317 | inode->i_fop = &udf_dir_operations; |
| 1318 | inode->i_mode |= S_IFDIR; |
Dave Hansen | d8c76e6 | 2006-09-30 23:29:04 -0700 | [diff] [blame] | 1319 | inc_nlink(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1320 | break; |
| 1321 | } |
| 1322 | case ICBTAG_FILE_TYPE_REALTIME: |
| 1323 | case ICBTAG_FILE_TYPE_REGULAR: |
| 1324 | case ICBTAG_FILE_TYPE_UNDEF: |
| 1325 | { |
| 1326 | if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_IN_ICB) |
| 1327 | inode->i_data.a_ops = &udf_adinicb_aops; |
| 1328 | else |
| 1329 | inode->i_data.a_ops = &udf_aops; |
| 1330 | inode->i_op = &udf_file_inode_operations; |
| 1331 | inode->i_fop = &udf_file_operations; |
| 1332 | inode->i_mode |= S_IFREG; |
| 1333 | break; |
| 1334 | } |
| 1335 | case ICBTAG_FILE_TYPE_BLOCK: |
| 1336 | { |
| 1337 | inode->i_mode |= S_IFBLK; |
| 1338 | break; |
| 1339 | } |
| 1340 | case ICBTAG_FILE_TYPE_CHAR: |
| 1341 | { |
| 1342 | inode->i_mode |= S_IFCHR; |
| 1343 | break; |
| 1344 | } |
| 1345 | case ICBTAG_FILE_TYPE_FIFO: |
| 1346 | { |
| 1347 | init_special_inode(inode, inode->i_mode | S_IFIFO, 0); |
| 1348 | break; |
| 1349 | } |
| 1350 | case ICBTAG_FILE_TYPE_SOCKET: |
| 1351 | { |
| 1352 | init_special_inode(inode, inode->i_mode | S_IFSOCK, 0); |
| 1353 | break; |
| 1354 | } |
| 1355 | case ICBTAG_FILE_TYPE_SYMLINK: |
| 1356 | { |
| 1357 | inode->i_data.a_ops = &udf_symlink_aops; |
| 1358 | inode->i_op = &page_symlink_inode_operations; |
| 1359 | inode->i_mode = S_IFLNK|S_IRWXUGO; |
| 1360 | break; |
| 1361 | } |
| 1362 | default: |
| 1363 | { |
| 1364 | printk(KERN_ERR "udf: udf_fill_inode(ino %ld) failed unknown file type=%d\n", |
| 1365 | inode->i_ino, fe->icbTag.fileType); |
| 1366 | make_bad_inode(inode); |
| 1367 | return; |
| 1368 | } |
| 1369 | } |
| 1370 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) |
| 1371 | { |
| 1372 | struct deviceSpec *dsea = |
| 1373 | (struct deviceSpec *) |
| 1374 | udf_get_extendedattr(inode, 12, 1); |
| 1375 | |
| 1376 | if (dsea) |
| 1377 | { |
| 1378 | init_special_inode(inode, inode->i_mode, MKDEV( |
| 1379 | le32_to_cpu(dsea->majorDeviceIdent), |
| 1380 | le32_to_cpu(dsea->minorDeviceIdent))); |
| 1381 | /* Developer ID ??? */ |
| 1382 | } |
| 1383 | else |
| 1384 | { |
| 1385 | make_bad_inode(inode); |
| 1386 | } |
| 1387 | } |
| 1388 | } |
| 1389 | |
Cyrill Gorcunov | 647bd61 | 2007-07-15 23:39:47 -0700 | [diff] [blame^] | 1390 | static int udf_alloc_i_data(struct inode *inode, size_t size) |
| 1391 | { |
| 1392 | UDF_I_DATA(inode) = kmalloc(size, GFP_KERNEL); |
| 1393 | |
| 1394 | if (!UDF_I_DATA(inode)) |
| 1395 | { |
| 1396 | printk(KERN_ERR "udf:udf_alloc_i_data (ino %ld) no free memory\n", |
| 1397 | inode->i_ino); |
| 1398 | return -ENOMEM; |
| 1399 | } |
| 1400 | |
| 1401 | return 0; |
| 1402 | } |
| 1403 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1404 | static mode_t |
| 1405 | udf_convert_permissions(struct fileEntry *fe) |
| 1406 | { |
| 1407 | mode_t mode; |
| 1408 | uint32_t permissions; |
| 1409 | uint32_t flags; |
| 1410 | |
| 1411 | permissions = le32_to_cpu(fe->permissions); |
| 1412 | flags = le16_to_cpu(fe->icbTag.flags); |
| 1413 | |
| 1414 | mode = (( permissions ) & S_IRWXO) | |
| 1415 | (( permissions >> 2 ) & S_IRWXG) | |
| 1416 | (( permissions >> 4 ) & S_IRWXU) | |
| 1417 | (( flags & ICBTAG_FLAG_SETUID) ? S_ISUID : 0) | |
| 1418 | (( flags & ICBTAG_FLAG_SETGID) ? S_ISGID : 0) | |
| 1419 | (( flags & ICBTAG_FLAG_STICKY) ? S_ISVTX : 0); |
| 1420 | |
| 1421 | return mode; |
| 1422 | } |
| 1423 | |
| 1424 | /* |
| 1425 | * udf_write_inode |
| 1426 | * |
| 1427 | * PURPOSE |
| 1428 | * Write out the specified inode. |
| 1429 | * |
| 1430 | * DESCRIPTION |
| 1431 | * This routine is called whenever an inode is synced. |
| 1432 | * Currently this routine is just a placeholder. |
| 1433 | * |
| 1434 | * HISTORY |
| 1435 | * July 1, 1997 - Andrew E. Mileski |
| 1436 | * Written, tested, and released. |
| 1437 | */ |
| 1438 | |
| 1439 | int udf_write_inode(struct inode * inode, int sync) |
| 1440 | { |
| 1441 | int ret; |
| 1442 | lock_kernel(); |
| 1443 | ret = udf_update_inode(inode, sync); |
| 1444 | unlock_kernel(); |
| 1445 | return ret; |
| 1446 | } |
| 1447 | |
| 1448 | int udf_sync_inode(struct inode * inode) |
| 1449 | { |
| 1450 | return udf_update_inode(inode, 1); |
| 1451 | } |
| 1452 | |
| 1453 | static int |
| 1454 | udf_update_inode(struct inode *inode, int do_sync) |
| 1455 | { |
| 1456 | struct buffer_head *bh = NULL; |
| 1457 | struct fileEntry *fe; |
| 1458 | struct extendedFileEntry *efe; |
| 1459 | uint32_t udfperms; |
| 1460 | uint16_t icbflags; |
| 1461 | uint16_t crclen; |
| 1462 | int i; |
| 1463 | kernel_timestamp cpu_time; |
| 1464 | int err = 0; |
| 1465 | |
| 1466 | bh = udf_tread(inode->i_sb, |
| 1467 | udf_get_lb_pblock(inode->i_sb, UDF_I_LOCATION(inode), 0)); |
| 1468 | |
| 1469 | if (!bh) |
| 1470 | { |
| 1471 | udf_debug("bread failure\n"); |
| 1472 | return -EIO; |
| 1473 | } |
| 1474 | |
| 1475 | memset(bh->b_data, 0x00, inode->i_sb->s_blocksize); |
| 1476 | |
| 1477 | fe = (struct fileEntry *)bh->b_data; |
| 1478 | efe = (struct extendedFileEntry *)bh->b_data; |
| 1479 | |
| 1480 | if (le16_to_cpu(fe->descTag.tagIdent) == TAG_IDENT_USE) |
| 1481 | { |
| 1482 | struct unallocSpaceEntry *use = |
| 1483 | (struct unallocSpaceEntry *)bh->b_data; |
| 1484 | |
| 1485 | use->lengthAllocDescs = cpu_to_le32(UDF_I_LENALLOC(inode)); |
| 1486 | memcpy(bh->b_data + sizeof(struct unallocSpaceEntry), UDF_I_DATA(inode), inode->i_sb->s_blocksize - sizeof(struct unallocSpaceEntry)); |
| 1487 | crclen = sizeof(struct unallocSpaceEntry) + UDF_I_LENALLOC(inode) - |
| 1488 | sizeof(tag); |
| 1489 | use->descTag.tagLocation = cpu_to_le32(UDF_I_LOCATION(inode).logicalBlockNum); |
| 1490 | use->descTag.descCRCLength = cpu_to_le16(crclen); |
| 1491 | use->descTag.descCRC = cpu_to_le16(udf_crc((char *)use + sizeof(tag), crclen, 0)); |
| 1492 | |
| 1493 | use->descTag.tagChecksum = 0; |
| 1494 | for (i=0; i<16; i++) |
| 1495 | if (i != 4) |
| 1496 | use->descTag.tagChecksum += ((uint8_t *)&(use->descTag))[i]; |
| 1497 | |
| 1498 | mark_buffer_dirty(bh); |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 1499 | brelse(bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1500 | return err; |
| 1501 | } |
| 1502 | |
Phillip Susi | 4d6660e | 2006-03-07 21:55:24 -0800 | [diff] [blame] | 1503 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_FORGET)) |
| 1504 | fe->uid = cpu_to_le32(-1); |
Phillip Susi | 0e6b3e5 | 2006-03-25 03:08:14 -0800 | [diff] [blame] | 1505 | else fe->uid = cpu_to_le32(inode->i_uid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1506 | |
Phillip Susi | 4d6660e | 2006-03-07 21:55:24 -0800 | [diff] [blame] | 1507 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_FORGET)) |
| 1508 | fe->gid = cpu_to_le32(-1); |
Phillip Susi | 0e6b3e5 | 2006-03-25 03:08:14 -0800 | [diff] [blame] | 1509 | else fe->gid = cpu_to_le32(inode->i_gid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1510 | |
| 1511 | udfperms = ((inode->i_mode & S_IRWXO) ) | |
| 1512 | ((inode->i_mode & S_IRWXG) << 2) | |
| 1513 | ((inode->i_mode & S_IRWXU) << 4); |
| 1514 | |
| 1515 | udfperms |= (le32_to_cpu(fe->permissions) & |
| 1516 | (FE_PERM_O_DELETE | FE_PERM_O_CHATTR | |
| 1517 | FE_PERM_G_DELETE | FE_PERM_G_CHATTR | |
| 1518 | FE_PERM_U_DELETE | FE_PERM_U_CHATTR)); |
| 1519 | fe->permissions = cpu_to_le32(udfperms); |
| 1520 | |
| 1521 | if (S_ISDIR(inode->i_mode)) |
| 1522 | fe->fileLinkCount = cpu_to_le16(inode->i_nlink - 1); |
| 1523 | else |
| 1524 | fe->fileLinkCount = cpu_to_le16(inode->i_nlink); |
| 1525 | |
| 1526 | fe->informationLength = cpu_to_le64(inode->i_size); |
| 1527 | |
| 1528 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) |
| 1529 | { |
| 1530 | regid *eid; |
| 1531 | struct deviceSpec *dsea = |
| 1532 | (struct deviceSpec *) |
| 1533 | udf_get_extendedattr(inode, 12, 1); |
| 1534 | |
| 1535 | if (!dsea) |
| 1536 | { |
| 1537 | dsea = (struct deviceSpec *) |
| 1538 | udf_add_extendedattr(inode, |
| 1539 | sizeof(struct deviceSpec) + |
| 1540 | sizeof(regid), 12, 0x3); |
| 1541 | dsea->attrType = cpu_to_le32(12); |
| 1542 | dsea->attrSubtype = 1; |
| 1543 | dsea->attrLength = cpu_to_le32(sizeof(struct deviceSpec) + |
| 1544 | sizeof(regid)); |
| 1545 | dsea->impUseLength = cpu_to_le32(sizeof(regid)); |
| 1546 | } |
| 1547 | eid = (regid *)dsea->impUse; |
| 1548 | memset(eid, 0, sizeof(regid)); |
| 1549 | strcpy(eid->ident, UDF_ID_DEVELOPER); |
| 1550 | eid->identSuffix[0] = UDF_OS_CLASS_UNIX; |
| 1551 | eid->identSuffix[1] = UDF_OS_ID_LINUX; |
| 1552 | dsea->majorDeviceIdent = cpu_to_le32(imajor(inode)); |
| 1553 | dsea->minorDeviceIdent = cpu_to_le32(iminor(inode)); |
| 1554 | } |
| 1555 | |
| 1556 | if (UDF_I_EFE(inode) == 0) |
| 1557 | { |
| 1558 | memcpy(bh->b_data + sizeof(struct fileEntry), UDF_I_DATA(inode), inode->i_sb->s_blocksize - sizeof(struct fileEntry)); |
| 1559 | fe->logicalBlocksRecorded = cpu_to_le64( |
| 1560 | (inode->i_blocks + (1 << (inode->i_sb->s_blocksize_bits - 9)) - 1) >> |
| 1561 | (inode->i_sb->s_blocksize_bits - 9)); |
| 1562 | |
| 1563 | if (udf_time_to_stamp(&cpu_time, inode->i_atime)) |
| 1564 | fe->accessTime = cpu_to_lets(cpu_time); |
| 1565 | if (udf_time_to_stamp(&cpu_time, inode->i_mtime)) |
| 1566 | fe->modificationTime = cpu_to_lets(cpu_time); |
| 1567 | if (udf_time_to_stamp(&cpu_time, inode->i_ctime)) |
| 1568 | fe->attrTime = cpu_to_lets(cpu_time); |
| 1569 | memset(&(fe->impIdent), 0, sizeof(regid)); |
| 1570 | strcpy(fe->impIdent.ident, UDF_ID_DEVELOPER); |
| 1571 | fe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; |
| 1572 | fe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; |
| 1573 | fe->uniqueID = cpu_to_le64(UDF_I_UNIQUE(inode)); |
| 1574 | fe->lengthExtendedAttr = cpu_to_le32(UDF_I_LENEATTR(inode)); |
| 1575 | fe->lengthAllocDescs = cpu_to_le32(UDF_I_LENALLOC(inode)); |
| 1576 | fe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_FE); |
| 1577 | crclen = sizeof(struct fileEntry); |
| 1578 | } |
| 1579 | else |
| 1580 | { |
| 1581 | memcpy(bh->b_data + sizeof(struct extendedFileEntry), UDF_I_DATA(inode), inode->i_sb->s_blocksize - sizeof(struct extendedFileEntry)); |
| 1582 | efe->objectSize = cpu_to_le64(inode->i_size); |
| 1583 | efe->logicalBlocksRecorded = cpu_to_le64( |
| 1584 | (inode->i_blocks + (1 << (inode->i_sb->s_blocksize_bits - 9)) - 1) >> |
| 1585 | (inode->i_sb->s_blocksize_bits - 9)); |
| 1586 | |
| 1587 | if (UDF_I_CRTIME(inode).tv_sec > inode->i_atime.tv_sec || |
| 1588 | (UDF_I_CRTIME(inode).tv_sec == inode->i_atime.tv_sec && |
| 1589 | UDF_I_CRTIME(inode).tv_nsec > inode->i_atime.tv_nsec)) |
| 1590 | { |
| 1591 | UDF_I_CRTIME(inode) = inode->i_atime; |
| 1592 | } |
| 1593 | if (UDF_I_CRTIME(inode).tv_sec > inode->i_mtime.tv_sec || |
| 1594 | (UDF_I_CRTIME(inode).tv_sec == inode->i_mtime.tv_sec && |
| 1595 | UDF_I_CRTIME(inode).tv_nsec > inode->i_mtime.tv_nsec)) |
| 1596 | { |
| 1597 | UDF_I_CRTIME(inode) = inode->i_mtime; |
| 1598 | } |
| 1599 | if (UDF_I_CRTIME(inode).tv_sec > inode->i_ctime.tv_sec || |
| 1600 | (UDF_I_CRTIME(inode).tv_sec == inode->i_ctime.tv_sec && |
| 1601 | UDF_I_CRTIME(inode).tv_nsec > inode->i_ctime.tv_nsec)) |
| 1602 | { |
| 1603 | UDF_I_CRTIME(inode) = inode->i_ctime; |
| 1604 | } |
| 1605 | |
| 1606 | if (udf_time_to_stamp(&cpu_time, inode->i_atime)) |
| 1607 | efe->accessTime = cpu_to_lets(cpu_time); |
| 1608 | if (udf_time_to_stamp(&cpu_time, inode->i_mtime)) |
| 1609 | efe->modificationTime = cpu_to_lets(cpu_time); |
| 1610 | if (udf_time_to_stamp(&cpu_time, UDF_I_CRTIME(inode))) |
| 1611 | efe->createTime = cpu_to_lets(cpu_time); |
| 1612 | if (udf_time_to_stamp(&cpu_time, inode->i_ctime)) |
| 1613 | efe->attrTime = cpu_to_lets(cpu_time); |
| 1614 | |
| 1615 | memset(&(efe->impIdent), 0, sizeof(regid)); |
| 1616 | strcpy(efe->impIdent.ident, UDF_ID_DEVELOPER); |
| 1617 | efe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; |
| 1618 | efe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; |
| 1619 | efe->uniqueID = cpu_to_le64(UDF_I_UNIQUE(inode)); |
| 1620 | efe->lengthExtendedAttr = cpu_to_le32(UDF_I_LENEATTR(inode)); |
| 1621 | efe->lengthAllocDescs = cpu_to_le32(UDF_I_LENALLOC(inode)); |
| 1622 | efe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_EFE); |
| 1623 | crclen = sizeof(struct extendedFileEntry); |
| 1624 | } |
| 1625 | if (UDF_I_STRAT4096(inode)) |
| 1626 | { |
| 1627 | fe->icbTag.strategyType = cpu_to_le16(4096); |
| 1628 | fe->icbTag.strategyParameter = cpu_to_le16(1); |
| 1629 | fe->icbTag.numEntries = cpu_to_le16(2); |
| 1630 | } |
| 1631 | else |
| 1632 | { |
| 1633 | fe->icbTag.strategyType = cpu_to_le16(4); |
| 1634 | fe->icbTag.numEntries = cpu_to_le16(1); |
| 1635 | } |
| 1636 | |
| 1637 | if (S_ISDIR(inode->i_mode)) |
| 1638 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_DIRECTORY; |
| 1639 | else if (S_ISREG(inode->i_mode)) |
| 1640 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_REGULAR; |
| 1641 | else if (S_ISLNK(inode->i_mode)) |
| 1642 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_SYMLINK; |
| 1643 | else if (S_ISBLK(inode->i_mode)) |
| 1644 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_BLOCK; |
| 1645 | else if (S_ISCHR(inode->i_mode)) |
| 1646 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_CHAR; |
| 1647 | else if (S_ISFIFO(inode->i_mode)) |
| 1648 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_FIFO; |
| 1649 | else if (S_ISSOCK(inode->i_mode)) |
| 1650 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_SOCKET; |
| 1651 | |
| 1652 | icbflags = UDF_I_ALLOCTYPE(inode) | |
| 1653 | ((inode->i_mode & S_ISUID) ? ICBTAG_FLAG_SETUID : 0) | |
| 1654 | ((inode->i_mode & S_ISGID) ? ICBTAG_FLAG_SETGID : 0) | |
| 1655 | ((inode->i_mode & S_ISVTX) ? ICBTAG_FLAG_STICKY : 0) | |
| 1656 | (le16_to_cpu(fe->icbTag.flags) & |
| 1657 | ~(ICBTAG_FLAG_AD_MASK | ICBTAG_FLAG_SETUID | |
| 1658 | ICBTAG_FLAG_SETGID | ICBTAG_FLAG_STICKY)); |
| 1659 | |
| 1660 | fe->icbTag.flags = cpu_to_le16(icbflags); |
| 1661 | if (UDF_SB_UDFREV(inode->i_sb) >= 0x0200) |
| 1662 | fe->descTag.descVersion = cpu_to_le16(3); |
| 1663 | else |
| 1664 | fe->descTag.descVersion = cpu_to_le16(2); |
| 1665 | fe->descTag.tagSerialNum = cpu_to_le16(UDF_SB_SERIALNUM(inode->i_sb)); |
| 1666 | fe->descTag.tagLocation = cpu_to_le32(UDF_I_LOCATION(inode).logicalBlockNum); |
| 1667 | crclen += UDF_I_LENEATTR(inode) + UDF_I_LENALLOC(inode) - sizeof(tag); |
| 1668 | fe->descTag.descCRCLength = cpu_to_le16(crclen); |
| 1669 | fe->descTag.descCRC = cpu_to_le16(udf_crc((char *)fe + sizeof(tag), crclen, 0)); |
| 1670 | |
| 1671 | fe->descTag.tagChecksum = 0; |
| 1672 | for (i=0; i<16; i++) |
| 1673 | if (i != 4) |
| 1674 | fe->descTag.tagChecksum += ((uint8_t *)&(fe->descTag))[i]; |
| 1675 | |
| 1676 | /* write the data blocks */ |
| 1677 | mark_buffer_dirty(bh); |
| 1678 | if (do_sync) |
| 1679 | { |
| 1680 | sync_dirty_buffer(bh); |
| 1681 | if (buffer_req(bh) && !buffer_uptodate(bh)) |
| 1682 | { |
| 1683 | printk("IO error syncing udf inode [%s:%08lx]\n", |
| 1684 | inode->i_sb->s_id, inode->i_ino); |
| 1685 | err = -EIO; |
| 1686 | } |
| 1687 | } |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 1688 | brelse(bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1689 | return err; |
| 1690 | } |
| 1691 | |
| 1692 | struct inode * |
| 1693 | udf_iget(struct super_block *sb, kernel_lb_addr ino) |
| 1694 | { |
| 1695 | unsigned long block = udf_get_lb_pblock(sb, ino, 0); |
| 1696 | struct inode *inode = iget_locked(sb, block); |
| 1697 | |
| 1698 | if (!inode) |
| 1699 | return NULL; |
| 1700 | |
| 1701 | if (inode->i_state & I_NEW) { |
| 1702 | memcpy(&UDF_I_LOCATION(inode), &ino, sizeof(kernel_lb_addr)); |
| 1703 | __udf_read_inode(inode); |
| 1704 | unlock_new_inode(inode); |
| 1705 | } |
| 1706 | |
| 1707 | if (is_bad_inode(inode)) |
| 1708 | goto out_iput; |
| 1709 | |
| 1710 | if (ino.logicalBlockNum >= UDF_SB_PARTLEN(sb, ino.partitionReferenceNum)) { |
| 1711 | udf_debug("block=%d, partition=%d out of range\n", |
| 1712 | ino.logicalBlockNum, ino.partitionReferenceNum); |
| 1713 | make_bad_inode(inode); |
| 1714 | goto out_iput; |
| 1715 | } |
| 1716 | |
| 1717 | return inode; |
| 1718 | |
| 1719 | out_iput: |
| 1720 | iput(inode); |
| 1721 | return NULL; |
| 1722 | } |
| 1723 | |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 1724 | int8_t udf_add_aext(struct inode *inode, struct extent_position *epos, |
| 1725 | kernel_lb_addr eloc, uint32_t elen, int inc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1726 | { |
| 1727 | int adsize; |
| 1728 | short_ad *sad = NULL; |
| 1729 | long_ad *lad = NULL; |
| 1730 | struct allocExtDesc *aed; |
| 1731 | int8_t etype; |
| 1732 | uint8_t *ptr; |
| 1733 | |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 1734 | if (!epos->bh) |
| 1735 | ptr = UDF_I_DATA(inode) + epos->offset - udf_file_entry_alloc_offset(inode) + UDF_I_LENEATTR(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1736 | else |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 1737 | ptr = epos->bh->b_data + epos->offset; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1738 | |
| 1739 | if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_SHORT) |
| 1740 | adsize = sizeof(short_ad); |
| 1741 | else if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_LONG) |
| 1742 | adsize = sizeof(long_ad); |
| 1743 | else |
| 1744 | return -1; |
| 1745 | |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 1746 | if (epos->offset + (2 * adsize) > inode->i_sb->s_blocksize) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1747 | { |
| 1748 | char *sptr, *dptr; |
| 1749 | struct buffer_head *nbh; |
| 1750 | int err, loffset; |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 1751 | kernel_lb_addr obloc = epos->block; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1752 | |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 1753 | if (!(epos->block.logicalBlockNum = udf_new_block(inode->i_sb, NULL, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1754 | obloc.partitionReferenceNum, obloc.logicalBlockNum, &err))) |
| 1755 | { |
| 1756 | return -1; |
| 1757 | } |
| 1758 | if (!(nbh = udf_tgetblk(inode->i_sb, udf_get_lb_pblock(inode->i_sb, |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 1759 | epos->block, 0)))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1760 | { |
| 1761 | return -1; |
| 1762 | } |
| 1763 | lock_buffer(nbh); |
| 1764 | memset(nbh->b_data, 0x00, inode->i_sb->s_blocksize); |
| 1765 | set_buffer_uptodate(nbh); |
| 1766 | unlock_buffer(nbh); |
| 1767 | mark_buffer_dirty_inode(nbh, inode); |
| 1768 | |
| 1769 | aed = (struct allocExtDesc *)(nbh->b_data); |
| 1770 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT)) |
| 1771 | aed->previousAllocExtLocation = cpu_to_le32(obloc.logicalBlockNum); |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 1772 | if (epos->offset + adsize > inode->i_sb->s_blocksize) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1773 | { |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 1774 | loffset = epos->offset; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1775 | aed->lengthAllocDescs = cpu_to_le32(adsize); |
| 1776 | sptr = ptr - adsize; |
| 1777 | dptr = nbh->b_data + sizeof(struct allocExtDesc); |
| 1778 | memcpy(dptr, sptr, adsize); |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 1779 | epos->offset = sizeof(struct allocExtDesc) + adsize; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1780 | } |
| 1781 | else |
| 1782 | { |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 1783 | loffset = epos->offset + adsize; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1784 | aed->lengthAllocDescs = cpu_to_le32(0); |
| 1785 | sptr = ptr; |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 1786 | epos->offset = sizeof(struct allocExtDesc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1787 | |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 1788 | if (epos->bh) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1789 | { |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 1790 | aed = (struct allocExtDesc *)epos->bh->b_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1791 | aed->lengthAllocDescs = |
| 1792 | cpu_to_le32(le32_to_cpu(aed->lengthAllocDescs) + adsize); |
| 1793 | } |
| 1794 | else |
| 1795 | { |
| 1796 | UDF_I_LENALLOC(inode) += adsize; |
| 1797 | mark_inode_dirty(inode); |
| 1798 | } |
| 1799 | } |
| 1800 | if (UDF_SB_UDFREV(inode->i_sb) >= 0x0200) |
| 1801 | udf_new_tag(nbh->b_data, TAG_IDENT_AED, 3, 1, |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 1802 | epos->block.logicalBlockNum, sizeof(tag)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1803 | else |
| 1804 | udf_new_tag(nbh->b_data, TAG_IDENT_AED, 2, 1, |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 1805 | epos->block.logicalBlockNum, sizeof(tag)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1806 | switch (UDF_I_ALLOCTYPE(inode)) |
| 1807 | { |
| 1808 | case ICBTAG_FLAG_AD_SHORT: |
| 1809 | { |
| 1810 | sad = (short_ad *)sptr; |
| 1811 | sad->extLength = cpu_to_le32( |
| 1812 | EXT_NEXT_EXTENT_ALLOCDECS | |
| 1813 | inode->i_sb->s_blocksize); |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 1814 | sad->extPosition = cpu_to_le32(epos->block.logicalBlockNum); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1815 | break; |
| 1816 | } |
| 1817 | case ICBTAG_FLAG_AD_LONG: |
| 1818 | { |
| 1819 | lad = (long_ad *)sptr; |
| 1820 | lad->extLength = cpu_to_le32( |
| 1821 | EXT_NEXT_EXTENT_ALLOCDECS | |
| 1822 | inode->i_sb->s_blocksize); |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 1823 | lad->extLocation = cpu_to_lelb(epos->block); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1824 | memset(lad->impUse, 0x00, sizeof(lad->impUse)); |
| 1825 | break; |
| 1826 | } |
| 1827 | } |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 1828 | if (epos->bh) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1829 | { |
| 1830 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || UDF_SB_UDFREV(inode->i_sb) >= 0x0201) |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 1831 | udf_update_tag(epos->bh->b_data, loffset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1832 | else |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 1833 | udf_update_tag(epos->bh->b_data, sizeof(struct allocExtDesc)); |
| 1834 | mark_buffer_dirty_inode(epos->bh, inode); |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 1835 | brelse(epos->bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1836 | } |
| 1837 | else |
| 1838 | mark_inode_dirty(inode); |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 1839 | epos->bh = nbh; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1840 | } |
| 1841 | |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 1842 | etype = udf_write_aext(inode, epos, eloc, elen, inc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1843 | |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 1844 | if (!epos->bh) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1845 | { |
| 1846 | UDF_I_LENALLOC(inode) += adsize; |
| 1847 | mark_inode_dirty(inode); |
| 1848 | } |
| 1849 | else |
| 1850 | { |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 1851 | aed = (struct allocExtDesc *)epos->bh->b_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1852 | aed->lengthAllocDescs = |
| 1853 | cpu_to_le32(le32_to_cpu(aed->lengthAllocDescs) + adsize); |
| 1854 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || UDF_SB_UDFREV(inode->i_sb) >= 0x0201) |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 1855 | udf_update_tag(epos->bh->b_data, epos->offset + (inc ? 0 : adsize)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1856 | else |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 1857 | udf_update_tag(epos->bh->b_data, sizeof(struct allocExtDesc)); |
| 1858 | mark_buffer_dirty_inode(epos->bh, inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1859 | } |
| 1860 | |
| 1861 | return etype; |
| 1862 | } |
| 1863 | |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 1864 | int8_t udf_write_aext(struct inode *inode, struct extent_position *epos, |
| 1865 | kernel_lb_addr eloc, uint32_t elen, int inc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1866 | { |
| 1867 | int adsize; |
| 1868 | uint8_t *ptr; |
| 1869 | |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 1870 | if (!epos->bh) |
| 1871 | ptr = UDF_I_DATA(inode) + epos->offset - udf_file_entry_alloc_offset(inode) + UDF_I_LENEATTR(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1872 | else |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 1873 | ptr = epos->bh->b_data + epos->offset; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1874 | |
| 1875 | switch (UDF_I_ALLOCTYPE(inode)) |
| 1876 | { |
| 1877 | case ICBTAG_FLAG_AD_SHORT: |
| 1878 | { |
| 1879 | short_ad *sad = (short_ad *)ptr; |
| 1880 | sad->extLength = cpu_to_le32(elen); |
| 1881 | sad->extPosition = cpu_to_le32(eloc.logicalBlockNum); |
| 1882 | adsize = sizeof(short_ad); |
| 1883 | break; |
| 1884 | } |
| 1885 | case ICBTAG_FLAG_AD_LONG: |
| 1886 | { |
| 1887 | long_ad *lad = (long_ad *)ptr; |
| 1888 | lad->extLength = cpu_to_le32(elen); |
| 1889 | lad->extLocation = cpu_to_lelb(eloc); |
| 1890 | memset(lad->impUse, 0x00, sizeof(lad->impUse)); |
| 1891 | adsize = sizeof(long_ad); |
| 1892 | break; |
| 1893 | } |
| 1894 | default: |
| 1895 | return -1; |
| 1896 | } |
| 1897 | |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 1898 | if (epos->bh) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1899 | { |
| 1900 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || UDF_SB_UDFREV(inode->i_sb) >= 0x0201) |
| 1901 | { |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 1902 | struct allocExtDesc *aed = (struct allocExtDesc *)epos->bh->b_data; |
| 1903 | udf_update_tag(epos->bh->b_data, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1904 | le32_to_cpu(aed->lengthAllocDescs) + sizeof(struct allocExtDesc)); |
| 1905 | } |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 1906 | mark_buffer_dirty_inode(epos->bh, inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1907 | } |
| 1908 | else |
| 1909 | mark_inode_dirty(inode); |
| 1910 | |
| 1911 | if (inc) |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 1912 | epos->offset += adsize; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1913 | return (elen >> 30); |
| 1914 | } |
| 1915 | |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 1916 | int8_t udf_next_aext(struct inode *inode, struct extent_position *epos, |
| 1917 | kernel_lb_addr *eloc, uint32_t *elen, int inc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1918 | { |
| 1919 | int8_t etype; |
| 1920 | |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 1921 | while ((etype = udf_current_aext(inode, epos, eloc, elen, inc)) == |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1922 | (EXT_NEXT_EXTENT_ALLOCDECS >> 30)) |
| 1923 | { |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 1924 | epos->block = *eloc; |
| 1925 | epos->offset = sizeof(struct allocExtDesc); |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 1926 | brelse(epos->bh); |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 1927 | if (!(epos->bh = udf_tread(inode->i_sb, udf_get_lb_pblock(inode->i_sb, epos->block, 0)))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1928 | { |
| 1929 | udf_debug("reading block %d failed!\n", |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 1930 | udf_get_lb_pblock(inode->i_sb, epos->block, 0)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1931 | return -1; |
| 1932 | } |
| 1933 | } |
| 1934 | |
| 1935 | return etype; |
| 1936 | } |
| 1937 | |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 1938 | int8_t udf_current_aext(struct inode *inode, struct extent_position *epos, |
| 1939 | kernel_lb_addr *eloc, uint32_t *elen, int inc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1940 | { |
| 1941 | int alen; |
| 1942 | int8_t etype; |
| 1943 | uint8_t *ptr; |
| 1944 | |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 1945 | if (!epos->bh) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1946 | { |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 1947 | if (!epos->offset) |
| 1948 | epos->offset = udf_file_entry_alloc_offset(inode); |
| 1949 | ptr = UDF_I_DATA(inode) + epos->offset - udf_file_entry_alloc_offset(inode) + UDF_I_LENEATTR(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1950 | alen = udf_file_entry_alloc_offset(inode) + UDF_I_LENALLOC(inode); |
| 1951 | } |
| 1952 | else |
| 1953 | { |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 1954 | if (!epos->offset) |
| 1955 | epos->offset = sizeof(struct allocExtDesc); |
| 1956 | ptr = epos->bh->b_data + epos->offset; |
| 1957 | alen = sizeof(struct allocExtDesc) + le32_to_cpu(((struct allocExtDesc *)epos->bh->b_data)->lengthAllocDescs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1958 | } |
| 1959 | |
| 1960 | switch (UDF_I_ALLOCTYPE(inode)) |
| 1961 | { |
| 1962 | case ICBTAG_FLAG_AD_SHORT: |
| 1963 | { |
| 1964 | short_ad *sad; |
| 1965 | |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 1966 | if (!(sad = udf_get_fileshortad(ptr, alen, &epos->offset, inc))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1967 | return -1; |
| 1968 | |
| 1969 | etype = le32_to_cpu(sad->extLength) >> 30; |
| 1970 | eloc->logicalBlockNum = le32_to_cpu(sad->extPosition); |
| 1971 | eloc->partitionReferenceNum = UDF_I_LOCATION(inode).partitionReferenceNum; |
| 1972 | *elen = le32_to_cpu(sad->extLength) & UDF_EXTENT_LENGTH_MASK; |
| 1973 | break; |
| 1974 | } |
| 1975 | case ICBTAG_FLAG_AD_LONG: |
| 1976 | { |
| 1977 | long_ad *lad; |
| 1978 | |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 1979 | if (!(lad = udf_get_filelongad(ptr, alen, &epos->offset, inc))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1980 | return -1; |
| 1981 | |
| 1982 | etype = le32_to_cpu(lad->extLength) >> 30; |
| 1983 | *eloc = lelb_to_cpu(lad->extLocation); |
| 1984 | *elen = le32_to_cpu(lad->extLength) & UDF_EXTENT_LENGTH_MASK; |
| 1985 | break; |
| 1986 | } |
| 1987 | default: |
| 1988 | { |
| 1989 | udf_debug("alloc_type = %d unsupported\n", UDF_I_ALLOCTYPE(inode)); |
| 1990 | return -1; |
| 1991 | } |
| 1992 | } |
| 1993 | |
| 1994 | return etype; |
| 1995 | } |
| 1996 | |
| 1997 | static int8_t |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 1998 | udf_insert_aext(struct inode *inode, struct extent_position epos, |
| 1999 | kernel_lb_addr neloc, uint32_t nelen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2000 | { |
| 2001 | kernel_lb_addr oeloc; |
| 2002 | uint32_t oelen; |
| 2003 | int8_t etype; |
| 2004 | |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 2005 | if (epos.bh) |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 2006 | get_bh(epos.bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2007 | |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 2008 | while ((etype = udf_next_aext(inode, &epos, &oeloc, &oelen, 0)) != -1) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2009 | { |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 2010 | udf_write_aext(inode, &epos, neloc, nelen, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2011 | |
| 2012 | neloc = oeloc; |
| 2013 | nelen = (etype << 30) | oelen; |
| 2014 | } |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 2015 | udf_add_aext(inode, &epos, neloc, nelen, 1); |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 2016 | brelse(epos.bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2017 | return (nelen >> 30); |
| 2018 | } |
| 2019 | |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 2020 | int8_t udf_delete_aext(struct inode *inode, struct extent_position epos, |
| 2021 | kernel_lb_addr eloc, uint32_t elen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2022 | { |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 2023 | struct extent_position oepos; |
| 2024 | int adsize; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2025 | int8_t etype; |
| 2026 | struct allocExtDesc *aed; |
| 2027 | |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 2028 | if (epos.bh) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2029 | { |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 2030 | get_bh(epos.bh); |
| 2031 | get_bh(epos.bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2032 | } |
| 2033 | |
| 2034 | if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_SHORT) |
| 2035 | adsize = sizeof(short_ad); |
| 2036 | else if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_LONG) |
| 2037 | adsize = sizeof(long_ad); |
| 2038 | else |
| 2039 | adsize = 0; |
| 2040 | |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 2041 | oepos = epos; |
| 2042 | if (udf_next_aext(inode, &epos, &eloc, &elen, 1) == -1) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2043 | return -1; |
| 2044 | |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 2045 | while ((etype = udf_next_aext(inode, &epos, &eloc, &elen, 1)) != -1) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2046 | { |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 2047 | udf_write_aext(inode, &oepos, eloc, (etype << 30) | elen, 1); |
| 2048 | if (oepos.bh != epos.bh) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2049 | { |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 2050 | oepos.block = epos.block; |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 2051 | brelse(oepos.bh); |
| 2052 | get_bh(epos.bh); |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 2053 | oepos.bh = epos.bh; |
| 2054 | oepos.offset = epos.offset - adsize; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2055 | } |
| 2056 | } |
| 2057 | memset(&eloc, 0x00, sizeof(kernel_lb_addr)); |
| 2058 | elen = 0; |
| 2059 | |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 2060 | if (epos.bh != oepos.bh) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2061 | { |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 2062 | udf_free_blocks(inode->i_sb, inode, epos.block, 0, 1); |
| 2063 | udf_write_aext(inode, &oepos, eloc, elen, 1); |
| 2064 | udf_write_aext(inode, &oepos, eloc, elen, 1); |
| 2065 | if (!oepos.bh) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2066 | { |
| 2067 | UDF_I_LENALLOC(inode) -= (adsize * 2); |
| 2068 | mark_inode_dirty(inode); |
| 2069 | } |
| 2070 | else |
| 2071 | { |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 2072 | aed = (struct allocExtDesc *)oepos.bh->b_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2073 | aed->lengthAllocDescs = |
| 2074 | cpu_to_le32(le32_to_cpu(aed->lengthAllocDescs) - (2*adsize)); |
| 2075 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || UDF_SB_UDFREV(inode->i_sb) >= 0x0201) |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 2076 | udf_update_tag(oepos.bh->b_data, oepos.offset - (2*adsize)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2077 | else |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 2078 | udf_update_tag(oepos.bh->b_data, sizeof(struct allocExtDesc)); |
| 2079 | mark_buffer_dirty_inode(oepos.bh, inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2080 | } |
| 2081 | } |
| 2082 | else |
| 2083 | { |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 2084 | udf_write_aext(inode, &oepos, eloc, elen, 1); |
| 2085 | if (!oepos.bh) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2086 | { |
| 2087 | UDF_I_LENALLOC(inode) -= adsize; |
| 2088 | mark_inode_dirty(inode); |
| 2089 | } |
| 2090 | else |
| 2091 | { |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 2092 | aed = (struct allocExtDesc *)oepos.bh->b_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2093 | aed->lengthAllocDescs = |
| 2094 | cpu_to_le32(le32_to_cpu(aed->lengthAllocDescs) - adsize); |
| 2095 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || UDF_SB_UDFREV(inode->i_sb) >= 0x0201) |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 2096 | udf_update_tag(oepos.bh->b_data, epos.offset - adsize); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2097 | else |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 2098 | udf_update_tag(oepos.bh->b_data, sizeof(struct allocExtDesc)); |
| 2099 | mark_buffer_dirty_inode(oepos.bh, inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2100 | } |
| 2101 | } |
Cyrill Gorcunov | 647bd61 | 2007-07-15 23:39:47 -0700 | [diff] [blame^] | 2102 | |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 2103 | brelse(epos.bh); |
| 2104 | brelse(oepos.bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2105 | return (elen >> 30); |
| 2106 | } |
| 2107 | |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 2108 | int8_t inode_bmap(struct inode *inode, sector_t block, struct extent_position *pos, |
| 2109 | kernel_lb_addr *eloc, uint32_t *elen, sector_t *offset) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2110 | { |
Jan Kara | 60448b1 | 2007-05-08 00:35:13 -0700 | [diff] [blame] | 2111 | loff_t lbcount = 0, bcount = (loff_t)block << inode->i_sb->s_blocksize_bits; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2112 | int8_t etype; |
| 2113 | |
| 2114 | if (block < 0) |
| 2115 | { |
| 2116 | printk(KERN_ERR "udf: inode_bmap: block < 0\n"); |
| 2117 | return -1; |
| 2118 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2119 | |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 2120 | pos->offset = 0; |
| 2121 | pos->block = UDF_I_LOCATION(inode); |
| 2122 | pos->bh = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2123 | *elen = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2124 | |
| 2125 | do |
| 2126 | { |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 2127 | if ((etype = udf_next_aext(inode, pos, eloc, elen, 1)) == -1) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2128 | { |
Jan Kara | 60448b1 | 2007-05-08 00:35:13 -0700 | [diff] [blame] | 2129 | *offset = (bcount - lbcount) >> inode->i_sb->s_blocksize_bits; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2130 | UDF_I_LENEXTENTS(inode) = lbcount; |
| 2131 | return -1; |
| 2132 | } |
| 2133 | lbcount += *elen; |
| 2134 | } while (lbcount <= bcount); |
| 2135 | |
Jan Kara | 60448b1 | 2007-05-08 00:35:13 -0700 | [diff] [blame] | 2136 | *offset = (bcount + *elen - lbcount) >> inode->i_sb->s_blocksize_bits; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2137 | |
| 2138 | return etype; |
| 2139 | } |
| 2140 | |
Jan Kara | 60448b1 | 2007-05-08 00:35:13 -0700 | [diff] [blame] | 2141 | long udf_block_map(struct inode *inode, sector_t block) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2142 | { |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 2143 | kernel_lb_addr eloc; |
| 2144 | uint32_t elen; |
Jan Kara | 60448b1 | 2007-05-08 00:35:13 -0700 | [diff] [blame] | 2145 | sector_t offset; |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 2146 | struct extent_position epos = { NULL, 0, { 0, 0}}; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2147 | int ret; |
| 2148 | |
| 2149 | lock_kernel(); |
| 2150 | |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 2151 | if (inode_bmap(inode, block, &epos, &eloc, &elen, &offset) == (EXT_RECORDED_ALLOCATED >> 30)) |
Jan Kara | 60448b1 | 2007-05-08 00:35:13 -0700 | [diff] [blame] | 2152 | ret = udf_get_lb_pblock(inode->i_sb, eloc, offset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2153 | else |
| 2154 | ret = 0; |
| 2155 | |
| 2156 | unlock_kernel(); |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 2157 | brelse(epos.bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2158 | |
| 2159 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_VARCONV)) |
| 2160 | return udf_fixed_to_variable(ret); |
| 2161 | else |
| 2162 | return ret; |
| 2163 | } |