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