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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * inode.c | |
3 | * | |
4 | * PURPOSE | |
5 | * Inode handling routines for the OSTA-UDF(tm) filesystem. | |
6 | * | |
7 | * CONTACTS | |
8 | * E-mail regarding any portion of the Linux UDF file system should be | |
9 | * directed to the development team mailing list (run by majordomo): | |
10 | * linux_udf@hpesjro.fc.hp.com | |
11 | * | |
12 | * COPYRIGHT | |
13 | * This file is distributed under the terms of the GNU General Public | |
14 | * License (GPL). Copies of the GPL can be obtained from: | |
15 | * ftp://prep.ai.mit.edu/pub/gnu/GPL | |
16 | * Each contributing author retains all rights to their own work. | |
17 | * | |
18 | * (C) 1998 Dave Boynton | |
19 | * (C) 1998-2004 Ben Fennema | |
20 | * (C) 1999-2000 Stelias Computing Inc | |
21 | * | |
22 | * HISTORY | |
23 | * | |
24 | * 10/04/98 dgb Added rudimentary directory functions | |
25 | * 10/07/98 Fully working udf_block_map! It works! | |
26 | * 11/25/98 bmap altered to better support extents | |
27 | * 12/06/98 blf partition support in udf_iget, udf_block_map and udf_read_inode | |
28 | * 12/12/98 rewrote udf_block_map to handle next extents and descs across | |
29 | * block boundaries (which is not actually allowed) | |
30 | * 12/20/98 added support for strategy 4096 | |
31 | * 03/07/99 rewrote udf_block_map (again) | |
32 | * New funcs, inode_bmap, udf_next_aext | |
33 | * 04/19/99 Support for writing device EA's for major/minor # | |
34 | */ | |
35 | ||
36 | #include "udfdecl.h" | |
37 | #include <linux/mm.h> | |
38 | #include <linux/smp_lock.h> | |
39 | #include <linux/module.h> | |
40 | #include <linux/pagemap.h> | |
41 | #include <linux/buffer_head.h> | |
42 | #include <linux/writeback.h> | |
43 | #include <linux/slab.h> | |
44 | ||
45 | #include "udf_i.h" | |
46 | #include "udf_sb.h" | |
47 | ||
48 | MODULE_AUTHOR("Ben Fennema"); | |
49 | MODULE_DESCRIPTION("Universal Disk Format Filesystem"); | |
50 | MODULE_LICENSE("GPL"); | |
51 | ||
52 | #define EXTENT_MERGE_SIZE 5 | |
53 | ||
54 | static mode_t udf_convert_permissions(struct fileEntry *); | |
55 | static int udf_update_inode(struct inode *, int); | |
56 | static void udf_fill_inode(struct inode *, struct buffer_head *); | |
57 | static struct buffer_head *inode_getblk(struct inode *, long, int *, | |
58 | long *, int *); | |
59 | static int8_t udf_insert_aext(struct inode *, kernel_lb_addr, int, | |
60 | kernel_lb_addr, uint32_t, struct buffer_head *); | |
61 | static void udf_split_extents(struct inode *, int *, int, int, | |
62 | kernel_long_ad [EXTENT_MERGE_SIZE], int *); | |
63 | static void udf_prealloc_extents(struct inode *, int, int, | |
64 | kernel_long_ad [EXTENT_MERGE_SIZE], int *); | |
65 | static void udf_merge_extents(struct inode *, | |
66 | kernel_long_ad [EXTENT_MERGE_SIZE], int *); | |
67 | static void udf_update_extents(struct inode *, | |
68 | kernel_long_ad [EXTENT_MERGE_SIZE], int, int, | |
69 | kernel_lb_addr, uint32_t, struct buffer_head **); | |
70 | static int udf_get_block(struct inode *, sector_t, struct buffer_head *, int); | |
71 | ||
72 | /* | |
73 | * udf_delete_inode | |
74 | * | |
75 | * PURPOSE | |
76 | * Clean-up before the specified inode is destroyed. | |
77 | * | |
78 | * DESCRIPTION | |
79 | * This routine is called when the kernel destroys an inode structure | |
80 | * ie. when iput() finds i_count == 0. | |
81 | * | |
82 | * HISTORY | |
83 | * July 1, 1997 - Andrew E. Mileski | |
84 | * Written, tested, and released. | |
85 | * | |
86 | * Called at the last iput() if i_nlink is zero. | |
87 | */ | |
88 | void udf_delete_inode(struct inode * inode) | |
89 | { | |
90 | if (is_bad_inode(inode)) | |
91 | goto no_delete; | |
92 | ||
93 | inode->i_size = 0; | |
94 | udf_truncate(inode); | |
95 | lock_kernel(); | |
96 | ||
97 | udf_update_inode(inode, IS_SYNC(inode)); | |
98 | udf_free_inode(inode); | |
99 | ||
100 | unlock_kernel(); | |
101 | return; | |
102 | no_delete: | |
103 | clear_inode(inode); | |
104 | } | |
105 | ||
106 | void udf_clear_inode(struct inode *inode) | |
107 | { | |
108 | if (!(inode->i_sb->s_flags & MS_RDONLY)) { | |
109 | lock_kernel(); | |
110 | udf_discard_prealloc(inode); | |
111 | unlock_kernel(); | |
112 | } | |
113 | ||
114 | kfree(UDF_I_DATA(inode)); | |
115 | UDF_I_DATA(inode) = NULL; | |
116 | } | |
117 | ||
118 | static int udf_writepage(struct page *page, struct writeback_control *wbc) | |
119 | { | |
120 | return block_write_full_page(page, udf_get_block, wbc); | |
121 | } | |
122 | ||
123 | static int udf_readpage(struct file *file, struct page *page) | |
124 | { | |
125 | return block_read_full_page(page, udf_get_block); | |
126 | } | |
127 | ||
128 | static int udf_prepare_write(struct file *file, struct page *page, unsigned from, unsigned to) | |
129 | { | |
130 | return block_prepare_write(page, from, to, udf_get_block); | |
131 | } | |
132 | ||
133 | static sector_t udf_bmap(struct address_space *mapping, sector_t block) | |
134 | { | |
135 | return generic_block_bmap(mapping,block,udf_get_block); | |
136 | } | |
137 | ||
138 | struct address_space_operations udf_aops = { | |
139 | .readpage = udf_readpage, | |
140 | .writepage = udf_writepage, | |
141 | .sync_page = block_sync_page, | |
142 | .prepare_write = udf_prepare_write, | |
143 | .commit_write = generic_commit_write, | |
144 | .bmap = udf_bmap, | |
145 | }; | |
146 | ||
147 | void udf_expand_file_adinicb(struct inode * inode, int newsize, int * err) | |
148 | { | |
149 | struct page *page; | |
150 | char *kaddr; | |
151 | struct writeback_control udf_wbc = { | |
152 | .sync_mode = WB_SYNC_NONE, | |
153 | .nr_to_write = 1, | |
154 | }; | |
155 | ||
156 | /* from now on we have normal address_space methods */ | |
157 | inode->i_data.a_ops = &udf_aops; | |
158 | ||
159 | if (!UDF_I_LENALLOC(inode)) | |
160 | { | |
161 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) | |
162 | UDF_I_ALLOCTYPE(inode) = ICBTAG_FLAG_AD_SHORT; | |
163 | else | |
164 | UDF_I_ALLOCTYPE(inode) = ICBTAG_FLAG_AD_LONG; | |
165 | mark_inode_dirty(inode); | |
166 | return; | |
167 | } | |
168 | ||
169 | page = grab_cache_page(inode->i_mapping, 0); | |
cd7619d6 MM |
170 | BUG_ON(!PageLocked(page)); |
171 | ||
1da177e4 LT |
172 | if (!PageUptodate(page)) |
173 | { | |
174 | kaddr = kmap(page); | |
175 | memset(kaddr + UDF_I_LENALLOC(inode), 0x00, | |
176 | PAGE_CACHE_SIZE - UDF_I_LENALLOC(inode)); | |
177 | memcpy(kaddr, UDF_I_DATA(inode) + UDF_I_LENEATTR(inode), | |
178 | UDF_I_LENALLOC(inode)); | |
179 | flush_dcache_page(page); | |
180 | SetPageUptodate(page); | |
181 | kunmap(page); | |
182 | } | |
183 | memset(UDF_I_DATA(inode) + UDF_I_LENEATTR(inode), 0x00, | |
184 | UDF_I_LENALLOC(inode)); | |
185 | UDF_I_LENALLOC(inode) = 0; | |
186 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) | |
187 | UDF_I_ALLOCTYPE(inode) = ICBTAG_FLAG_AD_SHORT; | |
188 | else | |
189 | UDF_I_ALLOCTYPE(inode) = ICBTAG_FLAG_AD_LONG; | |
190 | ||
191 | inode->i_data.a_ops->writepage(page, &udf_wbc); | |
192 | page_cache_release(page); | |
193 | ||
194 | mark_inode_dirty(inode); | |
195 | } | |
196 | ||
197 | struct buffer_head * udf_expand_dir_adinicb(struct inode *inode, int *block, int *err) | |
198 | { | |
199 | int newblock; | |
200 | struct buffer_head *sbh = NULL, *dbh = NULL; | |
201 | kernel_lb_addr bloc, eloc; | |
202 | uint32_t elen, extoffset; | |
203 | uint8_t alloctype; | |
204 | ||
205 | struct udf_fileident_bh sfibh, dfibh; | |
206 | loff_t f_pos = udf_ext0_offset(inode) >> 2; | |
207 | int size = (udf_ext0_offset(inode) + inode->i_size) >> 2; | |
208 | struct fileIdentDesc cfi, *sfi, *dfi; | |
209 | ||
210 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) | |
211 | alloctype = ICBTAG_FLAG_AD_SHORT; | |
212 | else | |
213 | alloctype = ICBTAG_FLAG_AD_LONG; | |
214 | ||
215 | if (!inode->i_size) | |
216 | { | |
217 | UDF_I_ALLOCTYPE(inode) = alloctype; | |
218 | mark_inode_dirty(inode); | |
219 | return NULL; | |
220 | } | |
221 | ||
222 | /* alloc block, and copy data to it */ | |
223 | *block = udf_new_block(inode->i_sb, inode, | |
224 | UDF_I_LOCATION(inode).partitionReferenceNum, | |
225 | UDF_I_LOCATION(inode).logicalBlockNum, err); | |
226 | ||
227 | if (!(*block)) | |
228 | return NULL; | |
229 | newblock = udf_get_pblock(inode->i_sb, *block, | |
230 | UDF_I_LOCATION(inode).partitionReferenceNum, 0); | |
231 | if (!newblock) | |
232 | return NULL; | |
233 | dbh = udf_tgetblk(inode->i_sb, newblock); | |
234 | if (!dbh) | |
235 | return NULL; | |
236 | lock_buffer(dbh); | |
237 | memset(dbh->b_data, 0x00, inode->i_sb->s_blocksize); | |
238 | set_buffer_uptodate(dbh); | |
239 | unlock_buffer(dbh); | |
240 | mark_buffer_dirty_inode(dbh, inode); | |
241 | ||
242 | sfibh.soffset = sfibh.eoffset = (f_pos & ((inode->i_sb->s_blocksize - 1) >> 2)) << 2; | |
243 | sbh = sfibh.sbh = sfibh.ebh = NULL; | |
244 | dfibh.soffset = dfibh.eoffset = 0; | |
245 | dfibh.sbh = dfibh.ebh = dbh; | |
246 | while ( (f_pos < size) ) | |
247 | { | |
248 | UDF_I_ALLOCTYPE(inode) = ICBTAG_FLAG_AD_IN_ICB; | |
249 | sfi = udf_fileident_read(inode, &f_pos, &sfibh, &cfi, NULL, NULL, NULL, NULL, NULL, NULL); | |
250 | if (!sfi) | |
251 | { | |
252 | udf_release_data(dbh); | |
253 | return NULL; | |
254 | } | |
255 | UDF_I_ALLOCTYPE(inode) = alloctype; | |
256 | sfi->descTag.tagLocation = cpu_to_le32(*block); | |
257 | dfibh.soffset = dfibh.eoffset; | |
258 | dfibh.eoffset += (sfibh.eoffset - sfibh.soffset); | |
259 | dfi = (struct fileIdentDesc *)(dbh->b_data + dfibh.soffset); | |
260 | if (udf_write_fi(inode, sfi, dfi, &dfibh, sfi->impUse, | |
261 | sfi->fileIdent + le16_to_cpu(sfi->lengthOfImpUse))) | |
262 | { | |
263 | UDF_I_ALLOCTYPE(inode) = ICBTAG_FLAG_AD_IN_ICB; | |
264 | udf_release_data(dbh); | |
265 | return NULL; | |
266 | } | |
267 | } | |
268 | mark_buffer_dirty_inode(dbh, inode); | |
269 | ||
270 | memset(UDF_I_DATA(inode) + UDF_I_LENEATTR(inode), 0, UDF_I_LENALLOC(inode)); | |
271 | UDF_I_LENALLOC(inode) = 0; | |
272 | bloc = UDF_I_LOCATION(inode); | |
273 | eloc.logicalBlockNum = *block; | |
274 | eloc.partitionReferenceNum = UDF_I_LOCATION(inode).partitionReferenceNum; | |
275 | elen = inode->i_size; | |
276 | UDF_I_LENEXTENTS(inode) = elen; | |
277 | extoffset = udf_file_entry_alloc_offset(inode); | |
278 | udf_add_aext(inode, &bloc, &extoffset, eloc, elen, &sbh, 0); | |
279 | /* UniqueID stuff */ | |
280 | ||
281 | udf_release_data(sbh); | |
282 | mark_inode_dirty(inode); | |
283 | return dbh; | |
284 | } | |
285 | ||
286 | static int udf_get_block(struct inode *inode, sector_t block, struct buffer_head *bh_result, int create) | |
287 | { | |
288 | int err, new; | |
289 | struct buffer_head *bh; | |
290 | unsigned long phys; | |
291 | ||
292 | if (!create) | |
293 | { | |
294 | phys = udf_block_map(inode, block); | |
295 | if (phys) | |
296 | map_bh(bh_result, inode->i_sb, phys); | |
297 | return 0; | |
298 | } | |
299 | ||
300 | err = -EIO; | |
301 | new = 0; | |
302 | bh = NULL; | |
303 | ||
304 | lock_kernel(); | |
305 | ||
306 | if (block < 0) | |
307 | goto abort_negative; | |
308 | ||
309 | if (block == UDF_I_NEXT_ALLOC_BLOCK(inode) + 1) | |
310 | { | |
311 | UDF_I_NEXT_ALLOC_BLOCK(inode) ++; | |
312 | UDF_I_NEXT_ALLOC_GOAL(inode) ++; | |
313 | } | |
314 | ||
315 | err = 0; | |
316 | ||
317 | bh = inode_getblk(inode, block, &err, &phys, &new); | |
318 | if (bh) | |
319 | BUG(); | |
320 | if (err) | |
321 | goto abort; | |
322 | if (!phys) | |
323 | BUG(); | |
324 | ||
325 | if (new) | |
326 | set_buffer_new(bh_result); | |
327 | map_bh(bh_result, inode->i_sb, phys); | |
328 | abort: | |
329 | unlock_kernel(); | |
330 | return err; | |
331 | ||
332 | abort_negative: | |
333 | udf_warning(inode->i_sb, "udf_get_block", "block < 0"); | |
334 | goto abort; | |
335 | } | |
336 | ||
337 | static struct buffer_head * | |
338 | udf_getblk(struct inode *inode, long block, int create, int *err) | |
339 | { | |
340 | struct buffer_head dummy; | |
341 | ||
342 | dummy.b_state = 0; | |
343 | dummy.b_blocknr = -1000; | |
344 | *err = udf_get_block(inode, block, &dummy, create); | |
345 | if (!*err && buffer_mapped(&dummy)) | |
346 | { | |
347 | struct buffer_head *bh; | |
348 | bh = sb_getblk(inode->i_sb, dummy.b_blocknr); | |
349 | if (buffer_new(&dummy)) | |
350 | { | |
351 | lock_buffer(bh); | |
352 | memset(bh->b_data, 0x00, inode->i_sb->s_blocksize); | |
353 | set_buffer_uptodate(bh); | |
354 | unlock_buffer(bh); | |
355 | mark_buffer_dirty_inode(bh, inode); | |
356 | } | |
357 | return bh; | |
358 | } | |
359 | return NULL; | |
360 | } | |
361 | ||
362 | static struct buffer_head * inode_getblk(struct inode * inode, long block, | |
363 | int *err, long *phys, int *new) | |
364 | { | |
365 | struct buffer_head *pbh = NULL, *cbh = NULL, *nbh = NULL, *result = NULL; | |
366 | kernel_long_ad laarr[EXTENT_MERGE_SIZE]; | |
367 | uint32_t pextoffset = 0, cextoffset = 0, nextoffset = 0; | |
368 | int count = 0, startnum = 0, endnum = 0; | |
369 | uint32_t elen = 0; | |
370 | kernel_lb_addr eloc, pbloc, cbloc, nbloc; | |
371 | int c = 1; | |
372 | uint64_t lbcount = 0, b_off = 0; | |
373 | uint32_t newblocknum, newblock, offset = 0; | |
374 | int8_t etype; | |
375 | int goal = 0, pgoal = UDF_I_LOCATION(inode).logicalBlockNum; | |
376 | char lastblock = 0; | |
377 | ||
378 | pextoffset = cextoffset = nextoffset = udf_file_entry_alloc_offset(inode); | |
379 | b_off = (uint64_t)block << inode->i_sb->s_blocksize_bits; | |
380 | pbloc = cbloc = nbloc = UDF_I_LOCATION(inode); | |
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 | { | |
387 | if (pbh != cbh) | |
388 | { | |
389 | udf_release_data(pbh); | |
390 | atomic_inc(&cbh->b_count); | |
391 | pbh = cbh; | |
392 | } | |
393 | if (cbh != nbh) | |
394 | { | |
395 | udf_release_data(cbh); | |
396 | atomic_inc(&nbh->b_count); | |
397 | cbh = nbh; | |
398 | } | |
399 | ||
400 | lbcount += elen; | |
401 | ||
402 | pbloc = cbloc; | |
403 | cbloc = nbloc; | |
404 | ||
405 | pextoffset = cextoffset; | |
406 | cextoffset = nextoffset; | |
407 | ||
408 | if ((etype = udf_next_aext(inode, &nbloc, &nextoffset, &eloc, &elen, &nbh, 1)) == -1) | |
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)); | |
437 | etype = udf_write_aext(inode, nbloc, &cextoffset, eloc, elen, nbh, 1); | |
438 | } | |
439 | udf_release_data(pbh); | |
440 | udf_release_data(cbh); | |
441 | udf_release_data(nbh); | |
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 | { | |
484 | if ((etype = udf_next_aext(inode, &nbloc, &nextoffset, &eloc, &elen, &nbh, 0)) != -1) | |
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 | } | |
495 | udf_release_data(cbh); | |
496 | udf_release_data(nbh); | |
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 | { | |
516 | udf_release_data(pbh); | |
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 */ | |
539 | udf_update_extents(inode, laarr, startnum, endnum, pbloc, pextoffset, &pbh); | |
540 | ||
541 | udf_release_data(pbh); | |
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, | |
803 | kernel_lb_addr pbloc, uint32_t pextoffset, struct buffer_head **pbh) | |
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++) | |
812 | { | |
813 | udf_delete_aext(inode, pbloc, pextoffset, laarr[i].extLocation, | |
814 | laarr[i].extLength, *pbh); | |
815 | } | |
816 | } | |
817 | else if (startnum < endnum) | |
818 | { | |
819 | for (i=0; i<(endnum-startnum); i++) | |
820 | { | |
821 | udf_insert_aext(inode, pbloc, pextoffset, laarr[i].extLocation, | |
822 | laarr[i].extLength, *pbh); | |
823 | udf_next_aext(inode, &pbloc, &pextoffset, &laarr[i].extLocation, | |
824 | &laarr[i].extLength, pbh, 1); | |
825 | start ++; | |
826 | } | |
827 | } | |
828 | ||
829 | for (i=start; i<endnum; i++) | |
830 | { | |
831 | udf_next_aext(inode, &pbloc, &pextoffset, &tmploc, &tmplen, pbh, 0); | |
832 | udf_write_aext(inode, pbloc, &pextoffset, laarr[i].extLocation, | |
833 | laarr[i].extLength, *pbh, 1); | |
834 | } | |
835 | } | |
836 | ||
837 | struct buffer_head * udf_bread(struct inode * inode, int block, | |
838 | int create, int * err) | |
839 | { | |
840 | struct buffer_head * bh = NULL; | |
841 | ||
842 | bh = udf_getblk(inode, block, create, err); | |
843 | if (!bh) | |
844 | return NULL; | |
845 | ||
846 | if (buffer_uptodate(bh)) | |
847 | return bh; | |
848 | ll_rw_block(READ, 1, &bh); | |
849 | wait_on_buffer(bh); | |
850 | if (buffer_uptodate(bh)) | |
851 | return bh; | |
852 | brelse(bh); | |
853 | *err = -EIO; | |
854 | return NULL; | |
855 | } | |
856 | ||
857 | void udf_truncate(struct inode * inode) | |
858 | { | |
859 | int offset; | |
860 | int err; | |
861 | ||
862 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || | |
863 | S_ISLNK(inode->i_mode))) | |
864 | return; | |
865 | if (IS_APPEND(inode) || IS_IMMUTABLE(inode)) | |
866 | return; | |
867 | ||
868 | lock_kernel(); | |
869 | if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_IN_ICB) | |
870 | { | |
871 | if (inode->i_sb->s_blocksize < (udf_file_entry_alloc_offset(inode) + | |
872 | inode->i_size)) | |
873 | { | |
874 | udf_expand_file_adinicb(inode, inode->i_size, &err); | |
875 | if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_IN_ICB) | |
876 | { | |
877 | inode->i_size = UDF_I_LENALLOC(inode); | |
878 | unlock_kernel(); | |
879 | return; | |
880 | } | |
881 | else | |
882 | udf_truncate_extents(inode); | |
883 | } | |
884 | else | |
885 | { | |
886 | offset = inode->i_size & (inode->i_sb->s_blocksize - 1); | |
887 | memset(UDF_I_DATA(inode) + UDF_I_LENEATTR(inode) + offset, 0x00, inode->i_sb->s_blocksize - offset - udf_file_entry_alloc_offset(inode)); | |
888 | UDF_I_LENALLOC(inode) = inode->i_size; | |
889 | } | |
890 | } | |
891 | else | |
892 | { | |
893 | block_truncate_page(inode->i_mapping, inode->i_size, udf_get_block); | |
894 | udf_truncate_extents(inode); | |
895 | } | |
896 | ||
897 | inode->i_mtime = inode->i_ctime = current_fs_time(inode->i_sb); | |
898 | if (IS_SYNC(inode)) | |
899 | udf_sync_inode (inode); | |
900 | else | |
901 | mark_inode_dirty(inode); | |
902 | unlock_kernel(); | |
903 | } | |
904 | ||
905 | static void | |
906 | __udf_read_inode(struct inode *inode) | |
907 | { | |
908 | struct buffer_head *bh = NULL; | |
909 | struct fileEntry *fe; | |
910 | uint16_t ident; | |
911 | ||
912 | /* | |
913 | * Set defaults, but the inode is still incomplete! | |
914 | * Note: get_new_inode() sets the following on a new inode: | |
915 | * i_sb = sb | |
916 | * i_no = ino | |
917 | * i_flags = sb->s_flags | |
918 | * i_state = 0 | |
919 | * clean_inode(): zero fills and sets | |
920 | * i_count = 1 | |
921 | * i_nlink = 1 | |
922 | * i_op = NULL; | |
923 | */ | |
924 | inode->i_blksize = PAGE_SIZE; | |
925 | ||
926 | bh = udf_read_ptagged(inode->i_sb, UDF_I_LOCATION(inode), 0, &ident); | |
927 | ||
928 | if (!bh) | |
929 | { | |
930 | printk(KERN_ERR "udf: udf_read_inode(ino %ld) failed !bh\n", | |
931 | inode->i_ino); | |
932 | make_bad_inode(inode); | |
933 | return; | |
934 | } | |
935 | ||
936 | if (ident != TAG_IDENT_FE && ident != TAG_IDENT_EFE && | |
937 | ident != TAG_IDENT_USE) | |
938 | { | |
939 | printk(KERN_ERR "udf: udf_read_inode(ino %ld) failed ident=%d\n", | |
940 | inode->i_ino, ident); | |
941 | udf_release_data(bh); | |
942 | make_bad_inode(inode); | |
943 | return; | |
944 | } | |
945 | ||
946 | fe = (struct fileEntry *)bh->b_data; | |
947 | ||
948 | if (le16_to_cpu(fe->icbTag.strategyType) == 4096) | |
949 | { | |
950 | struct buffer_head *ibh = NULL, *nbh = NULL; | |
951 | struct indirectEntry *ie; | |
952 | ||
953 | ibh = udf_read_ptagged(inode->i_sb, UDF_I_LOCATION(inode), 1, &ident); | |
954 | if (ident == TAG_IDENT_IE) | |
955 | { | |
956 | if (ibh) | |
957 | { | |
958 | kernel_lb_addr loc; | |
959 | ie = (struct indirectEntry *)ibh->b_data; | |
960 | ||
961 | loc = lelb_to_cpu(ie->indirectICB.extLocation); | |
962 | ||
963 | if (ie->indirectICB.extLength && | |
964 | (nbh = udf_read_ptagged(inode->i_sb, loc, 0, &ident))) | |
965 | { | |
966 | if (ident == TAG_IDENT_FE || | |
967 | ident == TAG_IDENT_EFE) | |
968 | { | |
969 | memcpy(&UDF_I_LOCATION(inode), &loc, sizeof(kernel_lb_addr)); | |
970 | udf_release_data(bh); | |
971 | udf_release_data(ibh); | |
972 | udf_release_data(nbh); | |
973 | __udf_read_inode(inode); | |
974 | return; | |
975 | } | |
976 | else | |
977 | { | |
978 | udf_release_data(nbh); | |
979 | udf_release_data(ibh); | |
980 | } | |
981 | } | |
982 | else | |
983 | udf_release_data(ibh); | |
984 | } | |
985 | } | |
986 | else | |
987 | udf_release_data(ibh); | |
988 | } | |
989 | else if (le16_to_cpu(fe->icbTag.strategyType) != 4) | |
990 | { | |
991 | printk(KERN_ERR "udf: unsupported strategy type: %d\n", | |
992 | le16_to_cpu(fe->icbTag.strategyType)); | |
993 | udf_release_data(bh); | |
994 | make_bad_inode(inode); | |
995 | return; | |
996 | } | |
997 | udf_fill_inode(inode, bh); | |
998 | udf_release_data(bh); | |
999 | } | |
1000 | ||
1001 | static void udf_fill_inode(struct inode *inode, struct buffer_head *bh) | |
1002 | { | |
1003 | struct fileEntry *fe; | |
1004 | struct extendedFileEntry *efe; | |
1005 | time_t convtime; | |
1006 | long convtime_usec; | |
1007 | int offset; | |
1008 | ||
1009 | fe = (struct fileEntry *)bh->b_data; | |
1010 | efe = (struct extendedFileEntry *)bh->b_data; | |
1011 | ||
1012 | if (le16_to_cpu(fe->icbTag.strategyType) == 4) | |
1013 | UDF_I_STRAT4096(inode) = 0; | |
1014 | else /* if (le16_to_cpu(fe->icbTag.strategyType) == 4096) */ | |
1015 | UDF_I_STRAT4096(inode) = 1; | |
1016 | ||
1017 | UDF_I_ALLOCTYPE(inode) = le16_to_cpu(fe->icbTag.flags) & ICBTAG_FLAG_AD_MASK; | |
1018 | UDF_I_UNIQUE(inode) = 0; | |
1019 | UDF_I_LENEATTR(inode) = 0; | |
1020 | UDF_I_LENEXTENTS(inode) = 0; | |
1021 | UDF_I_LENALLOC(inode) = 0; | |
1022 | UDF_I_NEXT_ALLOC_BLOCK(inode) = 0; | |
1023 | UDF_I_NEXT_ALLOC_GOAL(inode) = 0; | |
1024 | if (le16_to_cpu(fe->descTag.tagIdent) == TAG_IDENT_EFE) | |
1025 | { | |
1026 | UDF_I_EFE(inode) = 1; | |
1027 | UDF_I_USE(inode) = 0; | |
1028 | UDF_I_DATA(inode) = kmalloc(inode->i_sb->s_blocksize - sizeof(struct extendedFileEntry), GFP_KERNEL); | |
1029 | memcpy(UDF_I_DATA(inode), bh->b_data + sizeof(struct extendedFileEntry), inode->i_sb->s_blocksize - sizeof(struct extendedFileEntry)); | |
1030 | } | |
1031 | else if (le16_to_cpu(fe->descTag.tagIdent) == TAG_IDENT_FE) | |
1032 | { | |
1033 | UDF_I_EFE(inode) = 0; | |
1034 | UDF_I_USE(inode) = 0; | |
1035 | UDF_I_DATA(inode) = kmalloc(inode->i_sb->s_blocksize - sizeof(struct fileEntry), GFP_KERNEL); | |
1036 | memcpy(UDF_I_DATA(inode), bh->b_data + sizeof(struct fileEntry), inode->i_sb->s_blocksize - sizeof(struct fileEntry)); | |
1037 | } | |
1038 | else if (le16_to_cpu(fe->descTag.tagIdent) == TAG_IDENT_USE) | |
1039 | { | |
1040 | UDF_I_EFE(inode) = 0; | |
1041 | UDF_I_USE(inode) = 1; | |
1042 | UDF_I_LENALLOC(inode) = | |
1043 | le32_to_cpu( | |
1044 | ((struct unallocSpaceEntry *)bh->b_data)->lengthAllocDescs); | |
1045 | UDF_I_DATA(inode) = kmalloc(inode->i_sb->s_blocksize - sizeof(struct unallocSpaceEntry), GFP_KERNEL); | |
1046 | memcpy(UDF_I_DATA(inode), bh->b_data + sizeof(struct unallocSpaceEntry), inode->i_sb->s_blocksize - sizeof(struct unallocSpaceEntry)); | |
1047 | return; | |
1048 | } | |
1049 | ||
1050 | inode->i_uid = le32_to_cpu(fe->uid); | |
1051 | if ( inode->i_uid == -1 ) inode->i_uid = UDF_SB(inode->i_sb)->s_uid; | |
1052 | ||
1053 | inode->i_gid = le32_to_cpu(fe->gid); | |
1054 | if ( inode->i_gid == -1 ) inode->i_gid = UDF_SB(inode->i_sb)->s_gid; | |
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; | |
1171 | inode->i_nlink ++; | |
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); | |
1337 | udf_release_data(bh); | |
1338 | return err; | |
1339 | } | |
1340 | ||
1341 | if (inode->i_uid != UDF_SB(inode->i_sb)->s_uid) | |
1342 | fe->uid = cpu_to_le32(inode->i_uid); | |
1343 | ||
1344 | if (inode->i_gid != UDF_SB(inode->i_sb)->s_gid) | |
1345 | fe->gid = cpu_to_le32(inode->i_gid); | |
1346 | ||
1347 | udfperms = ((inode->i_mode & S_IRWXO) ) | | |
1348 | ((inode->i_mode & S_IRWXG) << 2) | | |
1349 | ((inode->i_mode & S_IRWXU) << 4); | |
1350 | ||
1351 | udfperms |= (le32_to_cpu(fe->permissions) & | |
1352 | (FE_PERM_O_DELETE | FE_PERM_O_CHATTR | | |
1353 | FE_PERM_G_DELETE | FE_PERM_G_CHATTR | | |
1354 | FE_PERM_U_DELETE | FE_PERM_U_CHATTR)); | |
1355 | fe->permissions = cpu_to_le32(udfperms); | |
1356 | ||
1357 | if (S_ISDIR(inode->i_mode)) | |
1358 | fe->fileLinkCount = cpu_to_le16(inode->i_nlink - 1); | |
1359 | else | |
1360 | fe->fileLinkCount = cpu_to_le16(inode->i_nlink); | |
1361 | ||
1362 | fe->informationLength = cpu_to_le64(inode->i_size); | |
1363 | ||
1364 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) | |
1365 | { | |
1366 | regid *eid; | |
1367 | struct deviceSpec *dsea = | |
1368 | (struct deviceSpec *) | |
1369 | udf_get_extendedattr(inode, 12, 1); | |
1370 | ||
1371 | if (!dsea) | |
1372 | { | |
1373 | dsea = (struct deviceSpec *) | |
1374 | udf_add_extendedattr(inode, | |
1375 | sizeof(struct deviceSpec) + | |
1376 | sizeof(regid), 12, 0x3); | |
1377 | dsea->attrType = cpu_to_le32(12); | |
1378 | dsea->attrSubtype = 1; | |
1379 | dsea->attrLength = cpu_to_le32(sizeof(struct deviceSpec) + | |
1380 | sizeof(regid)); | |
1381 | dsea->impUseLength = cpu_to_le32(sizeof(regid)); | |
1382 | } | |
1383 | eid = (regid *)dsea->impUse; | |
1384 | memset(eid, 0, sizeof(regid)); | |
1385 | strcpy(eid->ident, UDF_ID_DEVELOPER); | |
1386 | eid->identSuffix[0] = UDF_OS_CLASS_UNIX; | |
1387 | eid->identSuffix[1] = UDF_OS_ID_LINUX; | |
1388 | dsea->majorDeviceIdent = cpu_to_le32(imajor(inode)); | |
1389 | dsea->minorDeviceIdent = cpu_to_le32(iminor(inode)); | |
1390 | } | |
1391 | ||
1392 | if (UDF_I_EFE(inode) == 0) | |
1393 | { | |
1394 | memcpy(bh->b_data + sizeof(struct fileEntry), UDF_I_DATA(inode), inode->i_sb->s_blocksize - sizeof(struct fileEntry)); | |
1395 | fe->logicalBlocksRecorded = cpu_to_le64( | |
1396 | (inode->i_blocks + (1 << (inode->i_sb->s_blocksize_bits - 9)) - 1) >> | |
1397 | (inode->i_sb->s_blocksize_bits - 9)); | |
1398 | ||
1399 | if (udf_time_to_stamp(&cpu_time, inode->i_atime)) | |
1400 | fe->accessTime = cpu_to_lets(cpu_time); | |
1401 | if (udf_time_to_stamp(&cpu_time, inode->i_mtime)) | |
1402 | fe->modificationTime = cpu_to_lets(cpu_time); | |
1403 | if (udf_time_to_stamp(&cpu_time, inode->i_ctime)) | |
1404 | fe->attrTime = cpu_to_lets(cpu_time); | |
1405 | memset(&(fe->impIdent), 0, sizeof(regid)); | |
1406 | strcpy(fe->impIdent.ident, UDF_ID_DEVELOPER); | |
1407 | fe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; | |
1408 | fe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; | |
1409 | fe->uniqueID = cpu_to_le64(UDF_I_UNIQUE(inode)); | |
1410 | fe->lengthExtendedAttr = cpu_to_le32(UDF_I_LENEATTR(inode)); | |
1411 | fe->lengthAllocDescs = cpu_to_le32(UDF_I_LENALLOC(inode)); | |
1412 | fe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_FE); | |
1413 | crclen = sizeof(struct fileEntry); | |
1414 | } | |
1415 | else | |
1416 | { | |
1417 | memcpy(bh->b_data + sizeof(struct extendedFileEntry), UDF_I_DATA(inode), inode->i_sb->s_blocksize - sizeof(struct extendedFileEntry)); | |
1418 | efe->objectSize = cpu_to_le64(inode->i_size); | |
1419 | efe->logicalBlocksRecorded = cpu_to_le64( | |
1420 | (inode->i_blocks + (1 << (inode->i_sb->s_blocksize_bits - 9)) - 1) >> | |
1421 | (inode->i_sb->s_blocksize_bits - 9)); | |
1422 | ||
1423 | if (UDF_I_CRTIME(inode).tv_sec > inode->i_atime.tv_sec || | |
1424 | (UDF_I_CRTIME(inode).tv_sec == inode->i_atime.tv_sec && | |
1425 | UDF_I_CRTIME(inode).tv_nsec > inode->i_atime.tv_nsec)) | |
1426 | { | |
1427 | UDF_I_CRTIME(inode) = inode->i_atime; | |
1428 | } | |
1429 | if (UDF_I_CRTIME(inode).tv_sec > inode->i_mtime.tv_sec || | |
1430 | (UDF_I_CRTIME(inode).tv_sec == inode->i_mtime.tv_sec && | |
1431 | UDF_I_CRTIME(inode).tv_nsec > inode->i_mtime.tv_nsec)) | |
1432 | { | |
1433 | UDF_I_CRTIME(inode) = inode->i_mtime; | |
1434 | } | |
1435 | if (UDF_I_CRTIME(inode).tv_sec > inode->i_ctime.tv_sec || | |
1436 | (UDF_I_CRTIME(inode).tv_sec == inode->i_ctime.tv_sec && | |
1437 | UDF_I_CRTIME(inode).tv_nsec > inode->i_ctime.tv_nsec)) | |
1438 | { | |
1439 | UDF_I_CRTIME(inode) = inode->i_ctime; | |
1440 | } | |
1441 | ||
1442 | if (udf_time_to_stamp(&cpu_time, inode->i_atime)) | |
1443 | efe->accessTime = cpu_to_lets(cpu_time); | |
1444 | if (udf_time_to_stamp(&cpu_time, inode->i_mtime)) | |
1445 | efe->modificationTime = cpu_to_lets(cpu_time); | |
1446 | if (udf_time_to_stamp(&cpu_time, UDF_I_CRTIME(inode))) | |
1447 | efe->createTime = cpu_to_lets(cpu_time); | |
1448 | if (udf_time_to_stamp(&cpu_time, inode->i_ctime)) | |
1449 | efe->attrTime = cpu_to_lets(cpu_time); | |
1450 | ||
1451 | memset(&(efe->impIdent), 0, sizeof(regid)); | |
1452 | strcpy(efe->impIdent.ident, UDF_ID_DEVELOPER); | |
1453 | efe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; | |
1454 | efe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; | |
1455 | efe->uniqueID = cpu_to_le64(UDF_I_UNIQUE(inode)); | |
1456 | efe->lengthExtendedAttr = cpu_to_le32(UDF_I_LENEATTR(inode)); | |
1457 | efe->lengthAllocDescs = cpu_to_le32(UDF_I_LENALLOC(inode)); | |
1458 | efe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_EFE); | |
1459 | crclen = sizeof(struct extendedFileEntry); | |
1460 | } | |
1461 | if (UDF_I_STRAT4096(inode)) | |
1462 | { | |
1463 | fe->icbTag.strategyType = cpu_to_le16(4096); | |
1464 | fe->icbTag.strategyParameter = cpu_to_le16(1); | |
1465 | fe->icbTag.numEntries = cpu_to_le16(2); | |
1466 | } | |
1467 | else | |
1468 | { | |
1469 | fe->icbTag.strategyType = cpu_to_le16(4); | |
1470 | fe->icbTag.numEntries = cpu_to_le16(1); | |
1471 | } | |
1472 | ||
1473 | if (S_ISDIR(inode->i_mode)) | |
1474 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_DIRECTORY; | |
1475 | else if (S_ISREG(inode->i_mode)) | |
1476 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_REGULAR; | |
1477 | else if (S_ISLNK(inode->i_mode)) | |
1478 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_SYMLINK; | |
1479 | else if (S_ISBLK(inode->i_mode)) | |
1480 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_BLOCK; | |
1481 | else if (S_ISCHR(inode->i_mode)) | |
1482 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_CHAR; | |
1483 | else if (S_ISFIFO(inode->i_mode)) | |
1484 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_FIFO; | |
1485 | else if (S_ISSOCK(inode->i_mode)) | |
1486 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_SOCKET; | |
1487 | ||
1488 | icbflags = UDF_I_ALLOCTYPE(inode) | | |
1489 | ((inode->i_mode & S_ISUID) ? ICBTAG_FLAG_SETUID : 0) | | |
1490 | ((inode->i_mode & S_ISGID) ? ICBTAG_FLAG_SETGID : 0) | | |
1491 | ((inode->i_mode & S_ISVTX) ? ICBTAG_FLAG_STICKY : 0) | | |
1492 | (le16_to_cpu(fe->icbTag.flags) & | |
1493 | ~(ICBTAG_FLAG_AD_MASK | ICBTAG_FLAG_SETUID | | |
1494 | ICBTAG_FLAG_SETGID | ICBTAG_FLAG_STICKY)); | |
1495 | ||
1496 | fe->icbTag.flags = cpu_to_le16(icbflags); | |
1497 | if (UDF_SB_UDFREV(inode->i_sb) >= 0x0200) | |
1498 | fe->descTag.descVersion = cpu_to_le16(3); | |
1499 | else | |
1500 | fe->descTag.descVersion = cpu_to_le16(2); | |
1501 | fe->descTag.tagSerialNum = cpu_to_le16(UDF_SB_SERIALNUM(inode->i_sb)); | |
1502 | fe->descTag.tagLocation = cpu_to_le32(UDF_I_LOCATION(inode).logicalBlockNum); | |
1503 | crclen += UDF_I_LENEATTR(inode) + UDF_I_LENALLOC(inode) - sizeof(tag); | |
1504 | fe->descTag.descCRCLength = cpu_to_le16(crclen); | |
1505 | fe->descTag.descCRC = cpu_to_le16(udf_crc((char *)fe + sizeof(tag), crclen, 0)); | |
1506 | ||
1507 | fe->descTag.tagChecksum = 0; | |
1508 | for (i=0; i<16; i++) | |
1509 | if (i != 4) | |
1510 | fe->descTag.tagChecksum += ((uint8_t *)&(fe->descTag))[i]; | |
1511 | ||
1512 | /* write the data blocks */ | |
1513 | mark_buffer_dirty(bh); | |
1514 | if (do_sync) | |
1515 | { | |
1516 | sync_dirty_buffer(bh); | |
1517 | if (buffer_req(bh) && !buffer_uptodate(bh)) | |
1518 | { | |
1519 | printk("IO error syncing udf inode [%s:%08lx]\n", | |
1520 | inode->i_sb->s_id, inode->i_ino); | |
1521 | err = -EIO; | |
1522 | } | |
1523 | } | |
1524 | udf_release_data(bh); | |
1525 | return err; | |
1526 | } | |
1527 | ||
1528 | struct inode * | |
1529 | udf_iget(struct super_block *sb, kernel_lb_addr ino) | |
1530 | { | |
1531 | unsigned long block = udf_get_lb_pblock(sb, ino, 0); | |
1532 | struct inode *inode = iget_locked(sb, block); | |
1533 | ||
1534 | if (!inode) | |
1535 | return NULL; | |
1536 | ||
1537 | if (inode->i_state & I_NEW) { | |
1538 | memcpy(&UDF_I_LOCATION(inode), &ino, sizeof(kernel_lb_addr)); | |
1539 | __udf_read_inode(inode); | |
1540 | unlock_new_inode(inode); | |
1541 | } | |
1542 | ||
1543 | if (is_bad_inode(inode)) | |
1544 | goto out_iput; | |
1545 | ||
1546 | if (ino.logicalBlockNum >= UDF_SB_PARTLEN(sb, ino.partitionReferenceNum)) { | |
1547 | udf_debug("block=%d, partition=%d out of range\n", | |
1548 | ino.logicalBlockNum, ino.partitionReferenceNum); | |
1549 | make_bad_inode(inode); | |
1550 | goto out_iput; | |
1551 | } | |
1552 | ||
1553 | return inode; | |
1554 | ||
1555 | out_iput: | |
1556 | iput(inode); | |
1557 | return NULL; | |
1558 | } | |
1559 | ||
1560 | int8_t udf_add_aext(struct inode *inode, kernel_lb_addr *bloc, int *extoffset, | |
1561 | kernel_lb_addr eloc, uint32_t elen, struct buffer_head **bh, int inc) | |
1562 | { | |
1563 | int adsize; | |
1564 | short_ad *sad = NULL; | |
1565 | long_ad *lad = NULL; | |
1566 | struct allocExtDesc *aed; | |
1567 | int8_t etype; | |
1568 | uint8_t *ptr; | |
1569 | ||
1570 | if (!*bh) | |
1571 | ptr = UDF_I_DATA(inode) + *extoffset - udf_file_entry_alloc_offset(inode) + UDF_I_LENEATTR(inode); | |
1572 | else | |
1573 | ptr = (*bh)->b_data + *extoffset; | |
1574 | ||
1575 | if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_SHORT) | |
1576 | adsize = sizeof(short_ad); | |
1577 | else if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_LONG) | |
1578 | adsize = sizeof(long_ad); | |
1579 | else | |
1580 | return -1; | |
1581 | ||
1582 | if (*extoffset + (2 * adsize) > inode->i_sb->s_blocksize) | |
1583 | { | |
1584 | char *sptr, *dptr; | |
1585 | struct buffer_head *nbh; | |
1586 | int err, loffset; | |
1587 | kernel_lb_addr obloc = *bloc; | |
1588 | ||
1589 | if (!(bloc->logicalBlockNum = udf_new_block(inode->i_sb, NULL, | |
1590 | obloc.partitionReferenceNum, obloc.logicalBlockNum, &err))) | |
1591 | { | |
1592 | return -1; | |
1593 | } | |
1594 | if (!(nbh = udf_tgetblk(inode->i_sb, udf_get_lb_pblock(inode->i_sb, | |
1595 | *bloc, 0)))) | |
1596 | { | |
1597 | return -1; | |
1598 | } | |
1599 | lock_buffer(nbh); | |
1600 | memset(nbh->b_data, 0x00, inode->i_sb->s_blocksize); | |
1601 | set_buffer_uptodate(nbh); | |
1602 | unlock_buffer(nbh); | |
1603 | mark_buffer_dirty_inode(nbh, inode); | |
1604 | ||
1605 | aed = (struct allocExtDesc *)(nbh->b_data); | |
1606 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT)) | |
1607 | aed->previousAllocExtLocation = cpu_to_le32(obloc.logicalBlockNum); | |
1608 | if (*extoffset + adsize > inode->i_sb->s_blocksize) | |
1609 | { | |
1610 | loffset = *extoffset; | |
1611 | aed->lengthAllocDescs = cpu_to_le32(adsize); | |
1612 | sptr = ptr - adsize; | |
1613 | dptr = nbh->b_data + sizeof(struct allocExtDesc); | |
1614 | memcpy(dptr, sptr, adsize); | |
1615 | *extoffset = sizeof(struct allocExtDesc) + adsize; | |
1616 | } | |
1617 | else | |
1618 | { | |
1619 | loffset = *extoffset + adsize; | |
1620 | aed->lengthAllocDescs = cpu_to_le32(0); | |
1621 | sptr = ptr; | |
1622 | *extoffset = sizeof(struct allocExtDesc); | |
1623 | ||
1624 | if (*bh) | |
1625 | { | |
1626 | aed = (struct allocExtDesc *)(*bh)->b_data; | |
1627 | aed->lengthAllocDescs = | |
1628 | cpu_to_le32(le32_to_cpu(aed->lengthAllocDescs) + adsize); | |
1629 | } | |
1630 | else | |
1631 | { | |
1632 | UDF_I_LENALLOC(inode) += adsize; | |
1633 | mark_inode_dirty(inode); | |
1634 | } | |
1635 | } | |
1636 | if (UDF_SB_UDFREV(inode->i_sb) >= 0x0200) | |
1637 | udf_new_tag(nbh->b_data, TAG_IDENT_AED, 3, 1, | |
1638 | bloc->logicalBlockNum, sizeof(tag)); | |
1639 | else | |
1640 | udf_new_tag(nbh->b_data, TAG_IDENT_AED, 2, 1, | |
1641 | bloc->logicalBlockNum, sizeof(tag)); | |
1642 | switch (UDF_I_ALLOCTYPE(inode)) | |
1643 | { | |
1644 | case ICBTAG_FLAG_AD_SHORT: | |
1645 | { | |
1646 | sad = (short_ad *)sptr; | |
1647 | sad->extLength = cpu_to_le32( | |
1648 | EXT_NEXT_EXTENT_ALLOCDECS | | |
1649 | inode->i_sb->s_blocksize); | |
1650 | sad->extPosition = cpu_to_le32(bloc->logicalBlockNum); | |
1651 | break; | |
1652 | } | |
1653 | case ICBTAG_FLAG_AD_LONG: | |
1654 | { | |
1655 | lad = (long_ad *)sptr; | |
1656 | lad->extLength = cpu_to_le32( | |
1657 | EXT_NEXT_EXTENT_ALLOCDECS | | |
1658 | inode->i_sb->s_blocksize); | |
1659 | lad->extLocation = cpu_to_lelb(*bloc); | |
1660 | memset(lad->impUse, 0x00, sizeof(lad->impUse)); | |
1661 | break; | |
1662 | } | |
1663 | } | |
1664 | if (*bh) | |
1665 | { | |
1666 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || UDF_SB_UDFREV(inode->i_sb) >= 0x0201) | |
1667 | udf_update_tag((*bh)->b_data, loffset); | |
1668 | else | |
1669 | udf_update_tag((*bh)->b_data, sizeof(struct allocExtDesc)); | |
1670 | mark_buffer_dirty_inode(*bh, inode); | |
1671 | udf_release_data(*bh); | |
1672 | } | |
1673 | else | |
1674 | mark_inode_dirty(inode); | |
1675 | *bh = nbh; | |
1676 | } | |
1677 | ||
1678 | etype = udf_write_aext(inode, *bloc, extoffset, eloc, elen, *bh, inc); | |
1679 | ||
1680 | if (!*bh) | |
1681 | { | |
1682 | UDF_I_LENALLOC(inode) += adsize; | |
1683 | mark_inode_dirty(inode); | |
1684 | } | |
1685 | else | |
1686 | { | |
1687 | aed = (struct allocExtDesc *)(*bh)->b_data; | |
1688 | aed->lengthAllocDescs = | |
1689 | cpu_to_le32(le32_to_cpu(aed->lengthAllocDescs) + adsize); | |
1690 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || UDF_SB_UDFREV(inode->i_sb) >= 0x0201) | |
1691 | udf_update_tag((*bh)->b_data, *extoffset + (inc ? 0 : adsize)); | |
1692 | else | |
1693 | udf_update_tag((*bh)->b_data, sizeof(struct allocExtDesc)); | |
1694 | mark_buffer_dirty_inode(*bh, inode); | |
1695 | } | |
1696 | ||
1697 | return etype; | |
1698 | } | |
1699 | ||
1700 | int8_t udf_write_aext(struct inode *inode, kernel_lb_addr bloc, int *extoffset, | |
1701 | kernel_lb_addr eloc, uint32_t elen, struct buffer_head *bh, int inc) | |
1702 | { | |
1703 | int adsize; | |
1704 | uint8_t *ptr; | |
1705 | ||
1706 | if (!bh) | |
1707 | ptr = UDF_I_DATA(inode) + *extoffset - udf_file_entry_alloc_offset(inode) + UDF_I_LENEATTR(inode); | |
1708 | else | |
1709 | { | |
1710 | ptr = bh->b_data + *extoffset; | |
1711 | atomic_inc(&bh->b_count); | |
1712 | } | |
1713 | ||
1714 | switch (UDF_I_ALLOCTYPE(inode)) | |
1715 | { | |
1716 | case ICBTAG_FLAG_AD_SHORT: | |
1717 | { | |
1718 | short_ad *sad = (short_ad *)ptr; | |
1719 | sad->extLength = cpu_to_le32(elen); | |
1720 | sad->extPosition = cpu_to_le32(eloc.logicalBlockNum); | |
1721 | adsize = sizeof(short_ad); | |
1722 | break; | |
1723 | } | |
1724 | case ICBTAG_FLAG_AD_LONG: | |
1725 | { | |
1726 | long_ad *lad = (long_ad *)ptr; | |
1727 | lad->extLength = cpu_to_le32(elen); | |
1728 | lad->extLocation = cpu_to_lelb(eloc); | |
1729 | memset(lad->impUse, 0x00, sizeof(lad->impUse)); | |
1730 | adsize = sizeof(long_ad); | |
1731 | break; | |
1732 | } | |
1733 | default: | |
1734 | return -1; | |
1735 | } | |
1736 | ||
1737 | if (bh) | |
1738 | { | |
1739 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || UDF_SB_UDFREV(inode->i_sb) >= 0x0201) | |
1740 | { | |
1741 | struct allocExtDesc *aed = (struct allocExtDesc *)(bh)->b_data; | |
1742 | udf_update_tag((bh)->b_data, | |
1743 | le32_to_cpu(aed->lengthAllocDescs) + sizeof(struct allocExtDesc)); | |
1744 | } | |
1745 | mark_buffer_dirty_inode(bh, inode); | |
1746 | udf_release_data(bh); | |
1747 | } | |
1748 | else | |
1749 | mark_inode_dirty(inode); | |
1750 | ||
1751 | if (inc) | |
1752 | *extoffset += adsize; | |
1753 | return (elen >> 30); | |
1754 | } | |
1755 | ||
1756 | int8_t udf_next_aext(struct inode *inode, kernel_lb_addr *bloc, int *extoffset, | |
1757 | kernel_lb_addr *eloc, uint32_t *elen, struct buffer_head **bh, int inc) | |
1758 | { | |
1759 | int8_t etype; | |
1760 | ||
1761 | while ((etype = udf_current_aext(inode, bloc, extoffset, eloc, elen, bh, inc)) == | |
1762 | (EXT_NEXT_EXTENT_ALLOCDECS >> 30)) | |
1763 | { | |
1764 | *bloc = *eloc; | |
1765 | *extoffset = sizeof(struct allocExtDesc); | |
1766 | udf_release_data(*bh); | |
1767 | if (!(*bh = udf_tread(inode->i_sb, udf_get_lb_pblock(inode->i_sb, *bloc, 0)))) | |
1768 | { | |
1769 | udf_debug("reading block %d failed!\n", | |
1770 | udf_get_lb_pblock(inode->i_sb, *bloc, 0)); | |
1771 | return -1; | |
1772 | } | |
1773 | } | |
1774 | ||
1775 | return etype; | |
1776 | } | |
1777 | ||
1778 | int8_t udf_current_aext(struct inode *inode, kernel_lb_addr *bloc, int *extoffset, | |
1779 | kernel_lb_addr *eloc, uint32_t *elen, struct buffer_head **bh, int inc) | |
1780 | { | |
1781 | int alen; | |
1782 | int8_t etype; | |
1783 | uint8_t *ptr; | |
1784 | ||
1785 | if (!*bh) | |
1786 | { | |
1787 | if (!(*extoffset)) | |
1788 | *extoffset = udf_file_entry_alloc_offset(inode); | |
1789 | ptr = UDF_I_DATA(inode) + *extoffset - udf_file_entry_alloc_offset(inode) + UDF_I_LENEATTR(inode); | |
1790 | alen = udf_file_entry_alloc_offset(inode) + UDF_I_LENALLOC(inode); | |
1791 | } | |
1792 | else | |
1793 | { | |
1794 | if (!(*extoffset)) | |
1795 | *extoffset = sizeof(struct allocExtDesc); | |
1796 | ptr = (*bh)->b_data + *extoffset; | |
1797 | alen = sizeof(struct allocExtDesc) + le32_to_cpu(((struct allocExtDesc *)(*bh)->b_data)->lengthAllocDescs); | |
1798 | } | |
1799 | ||
1800 | switch (UDF_I_ALLOCTYPE(inode)) | |
1801 | { | |
1802 | case ICBTAG_FLAG_AD_SHORT: | |
1803 | { | |
1804 | short_ad *sad; | |
1805 | ||
1806 | if (!(sad = udf_get_fileshortad(ptr, alen, extoffset, inc))) | |
1807 | return -1; | |
1808 | ||
1809 | etype = le32_to_cpu(sad->extLength) >> 30; | |
1810 | eloc->logicalBlockNum = le32_to_cpu(sad->extPosition); | |
1811 | eloc->partitionReferenceNum = UDF_I_LOCATION(inode).partitionReferenceNum; | |
1812 | *elen = le32_to_cpu(sad->extLength) & UDF_EXTENT_LENGTH_MASK; | |
1813 | break; | |
1814 | } | |
1815 | case ICBTAG_FLAG_AD_LONG: | |
1816 | { | |
1817 | long_ad *lad; | |
1818 | ||
1819 | if (!(lad = udf_get_filelongad(ptr, alen, extoffset, inc))) | |
1820 | return -1; | |
1821 | ||
1822 | etype = le32_to_cpu(lad->extLength) >> 30; | |
1823 | *eloc = lelb_to_cpu(lad->extLocation); | |
1824 | *elen = le32_to_cpu(lad->extLength) & UDF_EXTENT_LENGTH_MASK; | |
1825 | break; | |
1826 | } | |
1827 | default: | |
1828 | { | |
1829 | udf_debug("alloc_type = %d unsupported\n", UDF_I_ALLOCTYPE(inode)); | |
1830 | return -1; | |
1831 | } | |
1832 | } | |
1833 | ||
1834 | return etype; | |
1835 | } | |
1836 | ||
1837 | static int8_t | |
1838 | udf_insert_aext(struct inode *inode, kernel_lb_addr bloc, int extoffset, | |
1839 | kernel_lb_addr neloc, uint32_t nelen, struct buffer_head *bh) | |
1840 | { | |
1841 | kernel_lb_addr oeloc; | |
1842 | uint32_t oelen; | |
1843 | int8_t etype; | |
1844 | ||
1845 | if (bh) | |
1846 | atomic_inc(&bh->b_count); | |
1847 | ||
1848 | while ((etype = udf_next_aext(inode, &bloc, &extoffset, &oeloc, &oelen, &bh, 0)) != -1) | |
1849 | { | |
1850 | udf_write_aext(inode, bloc, &extoffset, neloc, nelen, bh, 1); | |
1851 | ||
1852 | neloc = oeloc; | |
1853 | nelen = (etype << 30) | oelen; | |
1854 | } | |
1855 | udf_add_aext(inode, &bloc, &extoffset, neloc, nelen, &bh, 1); | |
1856 | udf_release_data(bh); | |
1857 | return (nelen >> 30); | |
1858 | } | |
1859 | ||
1860 | int8_t udf_delete_aext(struct inode *inode, kernel_lb_addr nbloc, int nextoffset, | |
1861 | kernel_lb_addr eloc, uint32_t elen, struct buffer_head *nbh) | |
1862 | { | |
1863 | struct buffer_head *obh; | |
1864 | kernel_lb_addr obloc; | |
1865 | int oextoffset, adsize; | |
1866 | int8_t etype; | |
1867 | struct allocExtDesc *aed; | |
1868 | ||
1869 | if (nbh) | |
1870 | { | |
1871 | atomic_inc(&nbh->b_count); | |
1872 | atomic_inc(&nbh->b_count); | |
1873 | } | |
1874 | ||
1875 | if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_SHORT) | |
1876 | adsize = sizeof(short_ad); | |
1877 | else if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_LONG) | |
1878 | adsize = sizeof(long_ad); | |
1879 | else | |
1880 | adsize = 0; | |
1881 | ||
1882 | obh = nbh; | |
1883 | obloc = nbloc; | |
1884 | oextoffset = nextoffset; | |
1885 | ||
1886 | if (udf_next_aext(inode, &nbloc, &nextoffset, &eloc, &elen, &nbh, 1) == -1) | |
1887 | return -1; | |
1888 | ||
1889 | while ((etype = udf_next_aext(inode, &nbloc, &nextoffset, &eloc, &elen, &nbh, 1)) != -1) | |
1890 | { | |
1891 | udf_write_aext(inode, obloc, &oextoffset, eloc, (etype << 30) | elen, obh, 1); | |
1892 | if (obh != nbh) | |
1893 | { | |
1894 | obloc = nbloc; | |
1895 | udf_release_data(obh); | |
1896 | atomic_inc(&nbh->b_count); | |
1897 | obh = nbh; | |
1898 | oextoffset = nextoffset - adsize; | |
1899 | } | |
1900 | } | |
1901 | memset(&eloc, 0x00, sizeof(kernel_lb_addr)); | |
1902 | elen = 0; | |
1903 | ||
1904 | if (nbh != obh) | |
1905 | { | |
1906 | udf_free_blocks(inode->i_sb, inode, nbloc, 0, 1); | |
1907 | udf_write_aext(inode, obloc, &oextoffset, eloc, elen, obh, 1); | |
1908 | udf_write_aext(inode, obloc, &oextoffset, eloc, elen, obh, 1); | |
1909 | if (!obh) | |
1910 | { | |
1911 | UDF_I_LENALLOC(inode) -= (adsize * 2); | |
1912 | mark_inode_dirty(inode); | |
1913 | } | |
1914 | else | |
1915 | { | |
1916 | aed = (struct allocExtDesc *)(obh)->b_data; | |
1917 | aed->lengthAllocDescs = | |
1918 | cpu_to_le32(le32_to_cpu(aed->lengthAllocDescs) - (2*adsize)); | |
1919 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || UDF_SB_UDFREV(inode->i_sb) >= 0x0201) | |
1920 | udf_update_tag((obh)->b_data, oextoffset - (2*adsize)); | |
1921 | else | |
1922 | udf_update_tag((obh)->b_data, sizeof(struct allocExtDesc)); | |
1923 | mark_buffer_dirty_inode(obh, inode); | |
1924 | } | |
1925 | } | |
1926 | else | |
1927 | { | |
1928 | udf_write_aext(inode, obloc, &oextoffset, eloc, elen, obh, 1); | |
1929 | if (!obh) | |
1930 | { | |
1931 | UDF_I_LENALLOC(inode) -= adsize; | |
1932 | mark_inode_dirty(inode); | |
1933 | } | |
1934 | else | |
1935 | { | |
1936 | aed = (struct allocExtDesc *)(obh)->b_data; | |
1937 | aed->lengthAllocDescs = | |
1938 | cpu_to_le32(le32_to_cpu(aed->lengthAllocDescs) - adsize); | |
1939 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || UDF_SB_UDFREV(inode->i_sb) >= 0x0201) | |
1940 | udf_update_tag((obh)->b_data, oextoffset - adsize); | |
1941 | else | |
1942 | udf_update_tag((obh)->b_data, sizeof(struct allocExtDesc)); | |
1943 | mark_buffer_dirty_inode(obh, inode); | |
1944 | } | |
1945 | } | |
1946 | ||
1947 | udf_release_data(nbh); | |
1948 | udf_release_data(obh); | |
1949 | return (elen >> 30); | |
1950 | } | |
1951 | ||
1952 | int8_t inode_bmap(struct inode *inode, int block, kernel_lb_addr *bloc, uint32_t *extoffset, | |
1953 | kernel_lb_addr *eloc, uint32_t *elen, uint32_t *offset, struct buffer_head **bh) | |
1954 | { | |
1955 | uint64_t lbcount = 0, bcount = (uint64_t)block << inode->i_sb->s_blocksize_bits; | |
1956 | int8_t etype; | |
1957 | ||
1958 | if (block < 0) | |
1959 | { | |
1960 | printk(KERN_ERR "udf: inode_bmap: block < 0\n"); | |
1961 | return -1; | |
1962 | } | |
1963 | if (!inode) | |
1964 | { | |
1965 | printk(KERN_ERR "udf: inode_bmap: NULL inode\n"); | |
1966 | return -1; | |
1967 | } | |
1968 | ||
1969 | *extoffset = 0; | |
1970 | *elen = 0; | |
1971 | *bloc = UDF_I_LOCATION(inode); | |
1972 | ||
1973 | do | |
1974 | { | |
1975 | if ((etype = udf_next_aext(inode, bloc, extoffset, eloc, elen, bh, 1)) == -1) | |
1976 | { | |
1977 | *offset = bcount - lbcount; | |
1978 | UDF_I_LENEXTENTS(inode) = lbcount; | |
1979 | return -1; | |
1980 | } | |
1981 | lbcount += *elen; | |
1982 | } while (lbcount <= bcount); | |
1983 | ||
1984 | *offset = bcount + *elen - lbcount; | |
1985 | ||
1986 | return etype; | |
1987 | } | |
1988 | ||
1989 | long udf_block_map(struct inode *inode, long block) | |
1990 | { | |
1991 | kernel_lb_addr eloc, bloc; | |
1992 | uint32_t offset, extoffset, elen; | |
1993 | struct buffer_head *bh = NULL; | |
1994 | int ret; | |
1995 | ||
1996 | lock_kernel(); | |
1997 | ||
1998 | if (inode_bmap(inode, block, &bloc, &extoffset, &eloc, &elen, &offset, &bh) == (EXT_RECORDED_ALLOCATED >> 30)) | |
1999 | ret = udf_get_lb_pblock(inode->i_sb, eloc, offset >> inode->i_sb->s_blocksize_bits); | |
2000 | else | |
2001 | ret = 0; | |
2002 | ||
2003 | unlock_kernel(); | |
2004 | udf_release_data(bh); | |
2005 | ||
2006 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_VARCONV)) | |
2007 | return udf_fixed_to_variable(ret); | |
2008 | else | |
2009 | return ret; | |
2010 | } |