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32#include "udfdecl.h"
33#include <linux/mm.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#include <linux/crc-itu-t.h>
40#include <linux/mpage.h>
41
42#include "udf_i.h"
43#include "udf_sb.h"
44
45MODULE_AUTHOR("Ben Fennema");
46MODULE_DESCRIPTION("Universal Disk Format Filesystem");
47MODULE_LICENSE("GPL");
48
49#define EXTENT_MERGE_SIZE 5
50
51static umode_t udf_convert_permissions(struct fileEntry *);
52static int udf_update_inode(struct inode *, int);
53static void udf_fill_inode(struct inode *, struct buffer_head *);
54static int udf_sync_inode(struct inode *inode);
55static int udf_alloc_i_data(struct inode *inode, size_t size);
56static sector_t inode_getblk(struct inode *, sector_t, int *, int *);
57static int8_t udf_insert_aext(struct inode *, struct extent_position,
58 struct kernel_lb_addr, uint32_t);
59static void udf_split_extents(struct inode *, int *, int, int,
60 struct kernel_long_ad[EXTENT_MERGE_SIZE], int *);
61static void udf_prealloc_extents(struct inode *, int, int,
62 struct kernel_long_ad[EXTENT_MERGE_SIZE], int *);
63static void udf_merge_extents(struct inode *,
64 struct kernel_long_ad[EXTENT_MERGE_SIZE], int *);
65static void udf_update_extents(struct inode *,
66 struct kernel_long_ad[EXTENT_MERGE_SIZE], int, int,
67 struct extent_position *);
68static int udf_get_block(struct inode *, sector_t, struct buffer_head *, int);
69
70
71void udf_evict_inode(struct inode *inode)
72{
73 struct udf_inode_info *iinfo = UDF_I(inode);
74 int want_delete = 0;
75
76 if (!inode->i_nlink && !is_bad_inode(inode)) {
77 want_delete = 1;
78 udf_setsize(inode, 0);
79 udf_update_inode(inode, IS_SYNC(inode));
80 } else
81 truncate_inode_pages(&inode->i_data, 0);
82 invalidate_inode_buffers(inode);
83 clear_inode(inode);
84 if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB &&
85 inode->i_size != iinfo->i_lenExtents) {
86 udf_warn(inode->i_sb, "Inode %lu (mode %o) has inode size %llu different from extent length %llu. Filesystem need not be standards compliant.\n",
87 inode->i_ino, inode->i_mode,
88 (unsigned long long)inode->i_size,
89 (unsigned long long)iinfo->i_lenExtents);
90 }
91 kfree(iinfo->i_ext.i_data);
92 iinfo->i_ext.i_data = NULL;
93 if (want_delete) {
94 udf_free_inode(inode);
95 }
96}
97
98static void udf_write_failed(struct address_space *mapping, loff_t to)
99{
100 struct inode *inode = mapping->host;
101 struct udf_inode_info *iinfo = UDF_I(inode);
102 loff_t isize = inode->i_size;
103
104 if (to > isize) {
105 truncate_pagecache(inode, to, isize);
106 if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
107 down_write(&iinfo->i_data_sem);
108 udf_truncate_extents(inode);
109 up_write(&iinfo->i_data_sem);
110 }
111 }
112}
113
114static int udf_writepage(struct page *page, struct writeback_control *wbc)
115{
116 return block_write_full_page(page, udf_get_block, wbc);
117}
118
119static int udf_writepages(struct address_space *mapping,
120 struct writeback_control *wbc)
121{
122 return mpage_writepages(mapping, wbc, udf_get_block);
123}
124
125static int udf_readpage(struct file *file, struct page *page)
126{
127 return mpage_readpage(page, udf_get_block);
128}
129
130static int udf_readpages(struct file *file, struct address_space *mapping,
131 struct list_head *pages, unsigned nr_pages)
132{
133 return mpage_readpages(mapping, pages, nr_pages, udf_get_block);
134}
135
136static int udf_write_begin(struct file *file, struct address_space *mapping,
137 loff_t pos, unsigned len, unsigned flags,
138 struct page **pagep, void **fsdata)
139{
140 int ret;
141
142 ret = block_write_begin(mapping, pos, len, flags, pagep, udf_get_block);
143 if (unlikely(ret))
144 udf_write_failed(mapping, pos + len);
145 return ret;
146}
147
148static ssize_t udf_direct_IO(int rw, struct kiocb *iocb,
149 const struct iovec *iov,
150 loff_t offset, unsigned long nr_segs)
151{
152 struct file *file = iocb->ki_filp;
153 struct address_space *mapping = file->f_mapping;
154 struct inode *inode = mapping->host;
155 ssize_t ret;
156
157 ret = blockdev_direct_IO(rw, iocb, inode, iov, offset, nr_segs,
158 udf_get_block);
159 if (unlikely(ret < 0 && (rw & WRITE)))
160 udf_write_failed(mapping, offset + iov_length(iov, nr_segs));
161 return ret;
162}
163
164static sector_t udf_bmap(struct address_space *mapping, sector_t block)
165{
166 return generic_block_bmap(mapping, block, udf_get_block);
167}
168
169const struct address_space_operations udf_aops = {
170 .readpage = udf_readpage,
171 .readpages = udf_readpages,
172 .writepage = udf_writepage,
173 .writepages = udf_writepages,
174 .write_begin = udf_write_begin,
175 .write_end = generic_write_end,
176 .direct_IO = udf_direct_IO,
177 .bmap = udf_bmap,
178};
179
180
181
182
183
184
185
186int udf_expand_file_adinicb(struct inode *inode)
187{
188 struct page *page;
189 char *kaddr;
190 struct udf_inode_info *iinfo = UDF_I(inode);
191 int err;
192 struct writeback_control udf_wbc = {
193 .sync_mode = WB_SYNC_NONE,
194 .nr_to_write = 1,
195 };
196
197 if (!iinfo->i_lenAlloc) {
198 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))
199 iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT;
200 else
201 iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG;
202
203 inode->i_data.a_ops = &udf_aops;
204 up_write(&iinfo->i_data_sem);
205 mark_inode_dirty(inode);
206 return 0;
207 }
208
209
210
211
212 up_write(&iinfo->i_data_sem);
213
214 page = find_or_create_page(inode->i_mapping, 0, GFP_NOFS);
215 if (!page)
216 return -ENOMEM;
217
218 if (!PageUptodate(page)) {
219 kaddr = kmap(page);
220 memset(kaddr + iinfo->i_lenAlloc, 0x00,
221 PAGE_CACHE_SIZE - iinfo->i_lenAlloc);
222 memcpy(kaddr, iinfo->i_ext.i_data + iinfo->i_lenEAttr,
223 iinfo->i_lenAlloc);
224 flush_dcache_page(page);
225 SetPageUptodate(page);
226 kunmap(page);
227 }
228 down_write(&iinfo->i_data_sem);
229 memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr, 0x00,
230 iinfo->i_lenAlloc);
231 iinfo->i_lenAlloc = 0;
232 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))
233 iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT;
234 else
235 iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG;
236
237 inode->i_data.a_ops = &udf_aops;
238 up_write(&iinfo->i_data_sem);
239 err = inode->i_data.a_ops->writepage(page, &udf_wbc);
240 if (err) {
241
242 lock_page(page);
243 kaddr = kmap(page);
244 down_write(&iinfo->i_data_sem);
245 memcpy(iinfo->i_ext.i_data + iinfo->i_lenEAttr, kaddr,
246 inode->i_size);
247 kunmap(page);
248 unlock_page(page);
249 iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB;
250 inode->i_data.a_ops = &udf_adinicb_aops;
251 up_write(&iinfo->i_data_sem);
252 }
253 page_cache_release(page);
254 mark_inode_dirty(inode);
255
256 return err;
257}
258
259struct buffer_head *udf_expand_dir_adinicb(struct inode *inode, int *block,
260 int *err)
261{
262 int newblock;
263 struct buffer_head *dbh = NULL;
264 struct kernel_lb_addr eloc;
265 uint8_t alloctype;
266 struct extent_position epos;
267
268 struct udf_fileident_bh sfibh, dfibh;
269 loff_t f_pos = udf_ext0_offset(inode);
270 int size = udf_ext0_offset(inode) + inode->i_size;
271 struct fileIdentDesc cfi, *sfi, *dfi;
272 struct udf_inode_info *iinfo = UDF_I(inode);
273
274 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))
275 alloctype = ICBTAG_FLAG_AD_SHORT;
276 else
277 alloctype = ICBTAG_FLAG_AD_LONG;
278
279 if (!inode->i_size) {
280 iinfo->i_alloc_type = alloctype;
281 mark_inode_dirty(inode);
282 return NULL;
283 }
284
285
286 *block = udf_new_block(inode->i_sb, inode,
287 iinfo->i_location.partitionReferenceNum,
288 iinfo->i_location.logicalBlockNum, err);
289 if (!(*block))
290 return NULL;
291 newblock = udf_get_pblock(inode->i_sb, *block,
292 iinfo->i_location.partitionReferenceNum,
293 0);
294 if (!newblock)
295 return NULL;
296 dbh = udf_tgetblk(inode->i_sb, newblock);
297 if (!dbh)
298 return NULL;
299 lock_buffer(dbh);
300 memset(dbh->b_data, 0x00, inode->i_sb->s_blocksize);
301 set_buffer_uptodate(dbh);
302 unlock_buffer(dbh);
303 mark_buffer_dirty_inode(dbh, inode);
304
305 sfibh.soffset = sfibh.eoffset =
306 f_pos & (inode->i_sb->s_blocksize - 1);
307 sfibh.sbh = sfibh.ebh = NULL;
308 dfibh.soffset = dfibh.eoffset = 0;
309 dfibh.sbh = dfibh.ebh = dbh;
310 while (f_pos < size) {
311 iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB;
312 sfi = udf_fileident_read(inode, &f_pos, &sfibh, &cfi, NULL,
313 NULL, NULL, NULL);
314 if (!sfi) {
315 brelse(dbh);
316 return NULL;
317 }
318 iinfo->i_alloc_type = alloctype;
319 sfi->descTag.tagLocation = cpu_to_le32(*block);
320 dfibh.soffset = dfibh.eoffset;
321 dfibh.eoffset += (sfibh.eoffset - sfibh.soffset);
322 dfi = (struct fileIdentDesc *)(dbh->b_data + dfibh.soffset);
323 if (udf_write_fi(inode, sfi, dfi, &dfibh, sfi->impUse,
324 sfi->fileIdent +
325 le16_to_cpu(sfi->lengthOfImpUse))) {
326 iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB;
327 brelse(dbh);
328 return NULL;
329 }
330 }
331 mark_buffer_dirty_inode(dbh, inode);
332
333 memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr, 0,
334 iinfo->i_lenAlloc);
335 iinfo->i_lenAlloc = 0;
336 eloc.logicalBlockNum = *block;
337 eloc.partitionReferenceNum =
338 iinfo->i_location.partitionReferenceNum;
339 iinfo->i_lenExtents = inode->i_size;
340 epos.bh = NULL;
341 epos.block = iinfo->i_location;
342 epos.offset = udf_file_entry_alloc_offset(inode);
343 udf_add_aext(inode, &epos, &eloc, inode->i_size, 0);
344
345
346 brelse(epos.bh);
347 mark_inode_dirty(inode);
348 return dbh;
349}
350
351static int udf_get_block(struct inode *inode, sector_t block,
352 struct buffer_head *bh_result, int create)
353{
354 int err, new;
355 sector_t phys = 0;
356 struct udf_inode_info *iinfo;
357
358 if (!create) {
359 phys = udf_block_map(inode, block);
360 if (phys)
361 map_bh(bh_result, inode->i_sb, phys);
362 return 0;
363 }
364
365 err = -EIO;
366 new = 0;
367 iinfo = UDF_I(inode);
368
369 down_write(&iinfo->i_data_sem);
370 if (block == iinfo->i_next_alloc_block + 1) {
371 iinfo->i_next_alloc_block++;
372 iinfo->i_next_alloc_goal++;
373 }
374
375
376 phys = inode_getblk(inode, block, &err, &new);
377 if (!phys)
378 goto abort;
379
380 if (new)
381 set_buffer_new(bh_result);
382 map_bh(bh_result, inode->i_sb, phys);
383
384abort:
385 up_write(&iinfo->i_data_sem);
386 return err;
387}
388
389static struct buffer_head *udf_getblk(struct inode *inode, long block,
390 int create, int *err)
391{
392 struct buffer_head *bh;
393 struct buffer_head dummy;
394
395 dummy.b_state = 0;
396 dummy.b_blocknr = -1000;
397 *err = udf_get_block(inode, block, &dummy, create);
398 if (!*err && buffer_mapped(&dummy)) {
399 bh = sb_getblk(inode->i_sb, dummy.b_blocknr);
400 if (buffer_new(&dummy)) {
401 lock_buffer(bh);
402 memset(bh->b_data, 0x00, inode->i_sb->s_blocksize);
403 set_buffer_uptodate(bh);
404 unlock_buffer(bh);
405 mark_buffer_dirty_inode(bh, inode);
406 }
407 return bh;
408 }
409
410 return NULL;
411}
412
413
414static int udf_do_extend_file(struct inode *inode,
415 struct extent_position *last_pos,
416 struct kernel_long_ad *last_ext,
417 sector_t blocks)
418{
419 sector_t add;
420 int count = 0, fake = !(last_ext->extLength & UDF_EXTENT_LENGTH_MASK);
421 struct super_block *sb = inode->i_sb;
422 struct kernel_lb_addr prealloc_loc = {};
423 int prealloc_len = 0;
424 struct udf_inode_info *iinfo;
425 int err;
426
427
428
429 if (!blocks && fake)
430 return 0;
431
432 iinfo = UDF_I(inode);
433
434 if (last_ext->extLength & (sb->s_blocksize - 1)) {
435 last_ext->extLength =
436 (last_ext->extLength & UDF_EXTENT_FLAG_MASK) |
437 (((last_ext->extLength & UDF_EXTENT_LENGTH_MASK) +
438 sb->s_blocksize - 1) & ~(sb->s_blocksize - 1));
439 iinfo->i_lenExtents =
440 (iinfo->i_lenExtents + sb->s_blocksize - 1) &
441 ~(sb->s_blocksize - 1);
442 }
443
444
445 if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) ==
446 EXT_NOT_RECORDED_ALLOCATED) {
447
448 prealloc_loc = last_ext->extLocation;
449 prealloc_len = last_ext->extLength;
450
451 last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED |
452 (last_ext->extLength & UDF_EXTENT_LENGTH_MASK);
453 last_ext->extLocation.logicalBlockNum = 0;
454 last_ext->extLocation.partitionReferenceNum = 0;
455 }
456
457
458 if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) ==
459 EXT_NOT_RECORDED_NOT_ALLOCATED) {
460 add = ((1 << 30) - sb->s_blocksize -
461 (last_ext->extLength & UDF_EXTENT_LENGTH_MASK)) >>
462 sb->s_blocksize_bits;
463 if (add > blocks)
464 add = blocks;
465 blocks -= add;
466 last_ext->extLength += add << sb->s_blocksize_bits;
467 }
468
469 if (fake) {
470 udf_add_aext(inode, last_pos, &last_ext->extLocation,
471 last_ext->extLength, 1);
472 count++;
473 } else
474 udf_write_aext(inode, last_pos, &last_ext->extLocation,
475 last_ext->extLength, 1);
476
477
478 if (!blocks)
479 goto out;
480
481
482 last_ext->extLocation.logicalBlockNum = 0;
483 last_ext->extLocation.partitionReferenceNum = 0;
484 add = (1 << (30-sb->s_blocksize_bits)) - 1;
485 last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED |
486 (add << sb->s_blocksize_bits);
487
488
489 while (blocks > add) {
490 blocks -= add;
491 err = udf_add_aext(inode, last_pos, &last_ext->extLocation,
492 last_ext->extLength, 1);
493 if (err)
494 return err;
495 count++;
496 }
497 if (blocks) {
498 last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED |
499 (blocks << sb->s_blocksize_bits);
500 err = udf_add_aext(inode, last_pos, &last_ext->extLocation,
501 last_ext->extLength, 1);
502 if (err)
503 return err;
504 count++;
505 }
506
507out:
508
509 if (prealloc_len) {
510 err = udf_add_aext(inode, last_pos, &prealloc_loc,
511 prealloc_len, 1);
512 if (err)
513 return err;
514 last_ext->extLocation = prealloc_loc;
515 last_ext->extLength = prealloc_len;
516 count++;
517 }
518
519
520 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
521 last_pos->offset -= sizeof(struct short_ad);
522 else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
523 last_pos->offset -= sizeof(struct long_ad);
524 else
525 return -EIO;
526
527 return count;
528}
529
530static int udf_extend_file(struct inode *inode, loff_t newsize)
531{
532
533 struct extent_position epos;
534 struct kernel_lb_addr eloc;
535 uint32_t elen;
536 int8_t etype;
537 struct super_block *sb = inode->i_sb;
538 sector_t first_block = newsize >> sb->s_blocksize_bits, offset;
539 int adsize;
540 struct udf_inode_info *iinfo = UDF_I(inode);
541 struct kernel_long_ad extent;
542 int err;
543
544 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
545 adsize = sizeof(struct short_ad);
546 else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
547 adsize = sizeof(struct long_ad);
548 else
549 BUG();
550
551 etype = inode_bmap(inode, first_block, &epos, &eloc, &elen, &offset);
552
553
554
555 if (etype != -1)
556 return 0;
557 if (newsize & (sb->s_blocksize - 1))
558 offset++;
559
560 if (offset == 0)
561 return 0;
562
563
564 if ((!epos.bh && epos.offset == udf_file_entry_alloc_offset(inode)) ||
565 (epos.bh && epos.offset == sizeof(struct allocExtDesc))) {
566
567
568 extent.extLocation.logicalBlockNum = 0;
569 extent.extLocation.partitionReferenceNum = 0;
570 extent.extLength = EXT_NOT_RECORDED_NOT_ALLOCATED;
571 } else {
572 epos.offset -= adsize;
573 etype = udf_next_aext(inode, &epos, &extent.extLocation,
574 &extent.extLength, 0);
575 extent.extLength |= etype << 30;
576 }
577 err = udf_do_extend_file(inode, &epos, &extent, offset);
578 if (err < 0)
579 goto out;
580 err = 0;
581 iinfo->i_lenExtents = newsize;
582out:
583 brelse(epos.bh);
584 return err;
585}
586
587static sector_t inode_getblk(struct inode *inode, sector_t block,
588 int *err, int *new)
589{
590 static sector_t last_block;
591 struct kernel_long_ad laarr[EXTENT_MERGE_SIZE];
592 struct extent_position prev_epos, cur_epos, next_epos;
593 int count = 0, startnum = 0, endnum = 0;
594 uint32_t elen = 0, tmpelen;
595 struct kernel_lb_addr eloc, tmpeloc;
596 int c = 1;
597 loff_t lbcount = 0, b_off = 0;
598 uint32_t newblocknum, newblock;
599 sector_t offset = 0;
600 int8_t etype;
601 struct udf_inode_info *iinfo = UDF_I(inode);
602 int goal = 0, pgoal = iinfo->i_location.logicalBlockNum;
603 int lastblock = 0;
604 bool isBeyondEOF;
605
606 *err = 0;
607 *new = 0;
608 prev_epos.offset = udf_file_entry_alloc_offset(inode);
609 prev_epos.block = iinfo->i_location;
610 prev_epos.bh = NULL;
611 cur_epos = next_epos = prev_epos;
612 b_off = (loff_t)block << inode->i_sb->s_blocksize_bits;
613
614
615
616
617 do {
618 if (prev_epos.bh != cur_epos.bh) {
619 brelse(prev_epos.bh);
620 get_bh(cur_epos.bh);
621 prev_epos.bh = cur_epos.bh;
622 }
623 if (cur_epos.bh != next_epos.bh) {
624 brelse(cur_epos.bh);
625 get_bh(next_epos.bh);
626 cur_epos.bh = next_epos.bh;
627 }
628
629 lbcount += elen;
630
631 prev_epos.block = cur_epos.block;
632 cur_epos.block = next_epos.block;
633
634 prev_epos.offset = cur_epos.offset;
635 cur_epos.offset = next_epos.offset;
636
637 etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 1);
638 if (etype == -1)
639 break;
640
641 c = !c;
642
643 laarr[c].extLength = (etype << 30) | elen;
644 laarr[c].extLocation = eloc;
645
646 if (etype != (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))
647 pgoal = eloc.logicalBlockNum +
648 ((elen + inode->i_sb->s_blocksize - 1) >>
649 inode->i_sb->s_blocksize_bits);
650
651 count++;
652 } while (lbcount + elen <= b_off);
653
654 b_off -= lbcount;
655 offset = b_off >> inode->i_sb->s_blocksize_bits;
656
657
658
659
660 udf_next_aext(inode, &prev_epos, &tmpeloc, &tmpelen, 0);
661 udf_next_aext(inode, &cur_epos, &tmpeloc, &tmpelen, 0);
662
663
664
665
666 if (etype == (EXT_RECORDED_ALLOCATED >> 30)) {
667 if (elen & (inode->i_sb->s_blocksize - 1)) {
668 elen = EXT_RECORDED_ALLOCATED |
669 ((elen + inode->i_sb->s_blocksize - 1) &
670 ~(inode->i_sb->s_blocksize - 1));
671 udf_write_aext(inode, &cur_epos, &eloc, elen, 1);
672 }
673 brelse(prev_epos.bh);
674 brelse(cur_epos.bh);
675 brelse(next_epos.bh);
676 newblock = udf_get_lb_pblock(inode->i_sb, &eloc, offset);
677 return newblock;
678 }
679
680 last_block = block;
681
682 if (etype == -1) {
683 int ret;
684 isBeyondEOF = 1;
685 if (count) {
686 if (c)
687 laarr[0] = laarr[1];
688 startnum = 1;
689 } else {
690
691 memset(&laarr[0].extLocation, 0x00,
692 sizeof(struct kernel_lb_addr));
693 laarr[0].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED;
694
695
696 startnum = (offset > 0);
697 }
698
699 ret = udf_do_extend_file(inode, &prev_epos, laarr, offset);
700 if (ret < 0) {
701 brelse(prev_epos.bh);
702 brelse(cur_epos.bh);
703 brelse(next_epos.bh);
704 *err = ret;
705 return 0;
706 }
707 c = 0;
708 offset = 0;
709 count += ret;
710
711 if ((laarr[0].extLength & UDF_EXTENT_FLAG_MASK) !=
712 EXT_NOT_RECORDED_ALLOCATED) {
713
714
715 if (count)
716 c = !c;
717 laarr[c].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED |
718 inode->i_sb->s_blocksize;
719 memset(&laarr[c].extLocation, 0x00,
720 sizeof(struct kernel_lb_addr));
721 count++;
722 endnum++;
723 }
724 endnum = c + 1;
725 lastblock = 1;
726 } else {
727 isBeyondEOF = 0;
728 endnum = startnum = ((count > 2) ? 2 : count);
729
730
731
732 if (!c && count != 1) {
733 laarr[2] = laarr[0];
734 laarr[0] = laarr[1];
735 laarr[1] = laarr[2];
736 c = 1;
737 }
738
739
740
741 etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 0);
742 if (etype != -1) {
743 laarr[c + 1].extLength = (etype << 30) | elen;
744 laarr[c + 1].extLocation = eloc;
745 count++;
746 startnum++;
747 endnum++;
748 } else
749 lastblock = 1;
750 }
751
752
753
754 if ((laarr[c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30))
755 newblocknum = laarr[c].extLocation.logicalBlockNum + offset;
756 else {
757 if (iinfo->i_next_alloc_block == block)
758 goal = iinfo->i_next_alloc_goal;
759
760 if (!goal) {
761 if (!(goal = pgoal))
762 goal = iinfo->i_location.logicalBlockNum + 1;
763 }
764
765 newblocknum = udf_new_block(inode->i_sb, inode,
766 iinfo->i_location.partitionReferenceNum,
767 goal, err);
768 if (!newblocknum) {
769 brelse(prev_epos.bh);
770 brelse(cur_epos.bh);
771 brelse(next_epos.bh);
772 *err = -ENOSPC;
773 return 0;
774 }
775 if (isBeyondEOF)
776 iinfo->i_lenExtents += inode->i_sb->s_blocksize;
777 }
778
779
780
781
782
783 udf_split_extents(inode, &c, offset, newblocknum, laarr, &endnum);
784
785#ifdef UDF_PREALLOCATE
786
787
788
789
790 if (S_ISREG(inode->i_mode))
791 udf_prealloc_extents(inode, c, lastblock, laarr, &endnum);
792#endif
793
794
795 udf_merge_extents(inode, laarr, &endnum);
796
797
798
799
800 udf_update_extents(inode, laarr, startnum, endnum, &prev_epos);
801
802 brelse(prev_epos.bh);
803 brelse(cur_epos.bh);
804 brelse(next_epos.bh);
805
806 newblock = udf_get_pblock(inode->i_sb, newblocknum,
807 iinfo->i_location.partitionReferenceNum, 0);
808 if (!newblock) {
809 *err = -EIO;
810 return 0;
811 }
812 *new = 1;
813 iinfo->i_next_alloc_block = block;
814 iinfo->i_next_alloc_goal = newblocknum;
815 inode->i_ctime = current_fs_time(inode->i_sb);
816
817 if (IS_SYNC(inode))
818 udf_sync_inode(inode);
819 else
820 mark_inode_dirty(inode);
821
822 return newblock;
823}
824
825static void udf_split_extents(struct inode *inode, int *c, int offset,
826 int newblocknum,
827 struct kernel_long_ad laarr[EXTENT_MERGE_SIZE],
828 int *endnum)
829{
830 unsigned long blocksize = inode->i_sb->s_blocksize;
831 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits;
832
833 if ((laarr[*c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30) ||
834 (laarr[*c].extLength >> 30) ==
835 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) {
836 int curr = *c;
837 int blen = ((laarr[curr].extLength & UDF_EXTENT_LENGTH_MASK) +
838 blocksize - 1) >> blocksize_bits;
839 int8_t etype = (laarr[curr].extLength >> 30);
840
841 if (blen == 1)
842 ;
843 else if (!offset || blen == offset + 1) {
844 laarr[curr + 2] = laarr[curr + 1];
845 laarr[curr + 1] = laarr[curr];
846 } else {
847 laarr[curr + 3] = laarr[curr + 1];
848 laarr[curr + 2] = laarr[curr + 1] = laarr[curr];
849 }
850
851 if (offset) {
852 if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30)) {
853 udf_free_blocks(inode->i_sb, inode,
854 &laarr[curr].extLocation,
855 0, offset);
856 laarr[curr].extLength =
857 EXT_NOT_RECORDED_NOT_ALLOCATED |
858 (offset << blocksize_bits);
859 laarr[curr].extLocation.logicalBlockNum = 0;
860 laarr[curr].extLocation.
861 partitionReferenceNum = 0;
862 } else
863 laarr[curr].extLength = (etype << 30) |
864 (offset << blocksize_bits);
865 curr++;
866 (*c)++;
867 (*endnum)++;
868 }
869
870 laarr[curr].extLocation.logicalBlockNum = newblocknum;
871 if (etype == (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))
872 laarr[curr].extLocation.partitionReferenceNum =
873 UDF_I(inode)->i_location.partitionReferenceNum;
874 laarr[curr].extLength = EXT_RECORDED_ALLOCATED |
875 blocksize;
876 curr++;
877
878 if (blen != offset + 1) {
879 if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30))
880 laarr[curr].extLocation.logicalBlockNum +=
881 offset + 1;
882 laarr[curr].extLength = (etype << 30) |
883 ((blen - (offset + 1)) << blocksize_bits);
884 curr++;
885 (*endnum)++;
886 }
887 }
888}
889
890static void udf_prealloc_extents(struct inode *inode, int c, int lastblock,
891 struct kernel_long_ad laarr[EXTENT_MERGE_SIZE],
892 int *endnum)
893{
894 int start, length = 0, currlength = 0, i;
895
896 if (*endnum >= (c + 1)) {
897 if (!lastblock)
898 return;
899 else
900 start = c;
901 } else {
902 if ((laarr[c + 1].extLength >> 30) ==
903 (EXT_NOT_RECORDED_ALLOCATED >> 30)) {
904 start = c + 1;
905 length = currlength =
906 (((laarr[c + 1].extLength &
907 UDF_EXTENT_LENGTH_MASK) +
908 inode->i_sb->s_blocksize - 1) >>
909 inode->i_sb->s_blocksize_bits);
910 } else
911 start = c;
912 }
913
914 for (i = start + 1; i <= *endnum; i++) {
915 if (i == *endnum) {
916 if (lastblock)
917 length += UDF_DEFAULT_PREALLOC_BLOCKS;
918 } else if ((laarr[i].extLength >> 30) ==
919 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) {
920 length += (((laarr[i].extLength &
921 UDF_EXTENT_LENGTH_MASK) +
922 inode->i_sb->s_blocksize - 1) >>
923 inode->i_sb->s_blocksize_bits);
924 } else
925 break;
926 }
927
928 if (length) {
929 int next = laarr[start].extLocation.logicalBlockNum +
930 (((laarr[start].extLength & UDF_EXTENT_LENGTH_MASK) +
931 inode->i_sb->s_blocksize - 1) >>
932 inode->i_sb->s_blocksize_bits);
933 int numalloc = udf_prealloc_blocks(inode->i_sb, inode,
934 laarr[start].extLocation.partitionReferenceNum,
935 next, (UDF_DEFAULT_PREALLOC_BLOCKS > length ?
936 length : UDF_DEFAULT_PREALLOC_BLOCKS) -
937 currlength);
938 if (numalloc) {
939 if (start == (c + 1))
940 laarr[start].extLength +=
941 (numalloc <<
942 inode->i_sb->s_blocksize_bits);
943 else {
944 memmove(&laarr[c + 2], &laarr[c + 1],
945 sizeof(struct long_ad) * (*endnum - (c + 1)));
946 (*endnum)++;
947 laarr[c + 1].extLocation.logicalBlockNum = next;
948 laarr[c + 1].extLocation.partitionReferenceNum =
949 laarr[c].extLocation.
950 partitionReferenceNum;
951 laarr[c + 1].extLength =
952 EXT_NOT_RECORDED_ALLOCATED |
953 (numalloc <<
954 inode->i_sb->s_blocksize_bits);
955 start = c + 1;
956 }
957
958 for (i = start + 1; numalloc && i < *endnum; i++) {
959 int elen = ((laarr[i].extLength &
960 UDF_EXTENT_LENGTH_MASK) +
961 inode->i_sb->s_blocksize - 1) >>
962 inode->i_sb->s_blocksize_bits;
963
964 if (elen > numalloc) {
965 laarr[i].extLength -=
966 (numalloc <<
967 inode->i_sb->s_blocksize_bits);
968 numalloc = 0;
969 } else {
970 numalloc -= elen;
971 if (*endnum > (i + 1))
972 memmove(&laarr[i],
973 &laarr[i + 1],
974 sizeof(struct long_ad) *
975 (*endnum - (i + 1)));
976 i--;
977 (*endnum)--;
978 }
979 }
980 UDF_I(inode)->i_lenExtents +=
981 numalloc << inode->i_sb->s_blocksize_bits;
982 }
983 }
984}
985
986static void udf_merge_extents(struct inode *inode,
987 struct kernel_long_ad laarr[EXTENT_MERGE_SIZE],
988 int *endnum)
989{
990 int i;
991 unsigned long blocksize = inode->i_sb->s_blocksize;
992 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits;
993
994 for (i = 0; i < (*endnum - 1); i++) {
995 struct kernel_long_ad *li = &laarr[i];
996 struct kernel_long_ad *lip1 = &laarr[i + 1];
997
998 if (((li->extLength >> 30) == (lip1->extLength >> 30)) &&
999 (((li->extLength >> 30) ==
1000 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) ||
1001 ((lip1->extLocation.logicalBlockNum -
1002 li->extLocation.logicalBlockNum) ==
1003 (((li->extLength & UDF_EXTENT_LENGTH_MASK) +
1004 blocksize - 1) >> blocksize_bits)))) {
1005
1006 if (((li->extLength & UDF_EXTENT_LENGTH_MASK) +
1007 (lip1->extLength & UDF_EXTENT_LENGTH_MASK) +
1008 blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) {
1009 lip1->extLength = (lip1->extLength -
1010 (li->extLength &
1011 UDF_EXTENT_LENGTH_MASK) +
1012 UDF_EXTENT_LENGTH_MASK) &
1013 ~(blocksize - 1);
1014 li->extLength = (li->extLength &
1015 UDF_EXTENT_FLAG_MASK) +
1016 (UDF_EXTENT_LENGTH_MASK + 1) -
1017 blocksize;
1018 lip1->extLocation.logicalBlockNum =
1019 li->extLocation.logicalBlockNum +
1020 ((li->extLength &
1021 UDF_EXTENT_LENGTH_MASK) >>
1022 blocksize_bits);
1023 } else {
1024 li->extLength = lip1->extLength +
1025 (((li->extLength &
1026 UDF_EXTENT_LENGTH_MASK) +
1027 blocksize - 1) & ~(blocksize - 1));
1028 if (*endnum > (i + 2))
1029 memmove(&laarr[i + 1], &laarr[i + 2],
1030 sizeof(struct long_ad) *
1031 (*endnum - (i + 2)));
1032 i--;
1033 (*endnum)--;
1034 }
1035 } else if (((li->extLength >> 30) ==
1036 (EXT_NOT_RECORDED_ALLOCATED >> 30)) &&
1037 ((lip1->extLength >> 30) ==
1038 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))) {
1039 udf_free_blocks(inode->i_sb, inode, &li->extLocation, 0,
1040 ((li->extLength &
1041 UDF_EXTENT_LENGTH_MASK) +
1042 blocksize - 1) >> blocksize_bits);
1043 li->extLocation.logicalBlockNum = 0;
1044 li->extLocation.partitionReferenceNum = 0;
1045
1046 if (((li->extLength & UDF_EXTENT_LENGTH_MASK) +
1047 (lip1->extLength & UDF_EXTENT_LENGTH_MASK) +
1048 blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) {
1049 lip1->extLength = (lip1->extLength -
1050 (li->extLength &
1051 UDF_EXTENT_LENGTH_MASK) +
1052 UDF_EXTENT_LENGTH_MASK) &
1053 ~(blocksize - 1);
1054 li->extLength = (li->extLength &
1055 UDF_EXTENT_FLAG_MASK) +
1056 (UDF_EXTENT_LENGTH_MASK + 1) -
1057 blocksize;
1058 } else {
1059 li->extLength = lip1->extLength +
1060 (((li->extLength &
1061 UDF_EXTENT_LENGTH_MASK) +
1062 blocksize - 1) & ~(blocksize - 1));
1063 if (*endnum > (i + 2))
1064 memmove(&laarr[i + 1], &laarr[i + 2],
1065 sizeof(struct long_ad) *
1066 (*endnum - (i + 2)));
1067 i--;
1068 (*endnum)--;
1069 }
1070 } else if ((li->extLength >> 30) ==
1071 (EXT_NOT_RECORDED_ALLOCATED >> 30)) {
1072 udf_free_blocks(inode->i_sb, inode,
1073 &li->extLocation, 0,
1074 ((li->extLength &
1075 UDF_EXTENT_LENGTH_MASK) +
1076 blocksize - 1) >> blocksize_bits);
1077 li->extLocation.logicalBlockNum = 0;
1078 li->extLocation.partitionReferenceNum = 0;
1079 li->extLength = (li->extLength &
1080 UDF_EXTENT_LENGTH_MASK) |
1081 EXT_NOT_RECORDED_NOT_ALLOCATED;
1082 }
1083 }
1084}
1085
1086static void udf_update_extents(struct inode *inode,
1087 struct kernel_long_ad laarr[EXTENT_MERGE_SIZE],
1088 int startnum, int endnum,
1089 struct extent_position *epos)
1090{
1091 int start = 0, i;
1092 struct kernel_lb_addr tmploc;
1093 uint32_t tmplen;
1094
1095 if (startnum > endnum) {
1096 for (i = 0; i < (startnum - endnum); i++)
1097 udf_delete_aext(inode, *epos, laarr[i].extLocation,
1098 laarr[i].extLength);
1099 } else if (startnum < endnum) {
1100 for (i = 0; i < (endnum - startnum); i++) {
1101 udf_insert_aext(inode, *epos, laarr[i].extLocation,
1102 laarr[i].extLength);
1103 udf_next_aext(inode, epos, &laarr[i].extLocation,
1104 &laarr[i].extLength, 1);
1105 start++;
1106 }
1107 }
1108
1109 for (i = start; i < endnum; i++) {
1110 udf_next_aext(inode, epos, &tmploc, &tmplen, 0);
1111 udf_write_aext(inode, epos, &laarr[i].extLocation,
1112 laarr[i].extLength, 1);
1113 }
1114}
1115
1116struct buffer_head *udf_bread(struct inode *inode, int block,
1117 int create, int *err)
1118{
1119 struct buffer_head *bh = NULL;
1120
1121 bh = udf_getblk(inode, block, create, err);
1122 if (!bh)
1123 return NULL;
1124
1125 if (buffer_uptodate(bh))
1126 return bh;
1127
1128 ll_rw_block(READ, 1, &bh);
1129
1130 wait_on_buffer(bh);
1131 if (buffer_uptodate(bh))
1132 return bh;
1133
1134 brelse(bh);
1135 *err = -EIO;
1136 return NULL;
1137}
1138
1139int udf_setsize(struct inode *inode, loff_t newsize)
1140{
1141 int err;
1142 struct udf_inode_info *iinfo;
1143 int bsize = 1 << inode->i_blkbits;
1144
1145 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
1146 S_ISLNK(inode->i_mode)))
1147 return -EINVAL;
1148 if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
1149 return -EPERM;
1150
1151 iinfo = UDF_I(inode);
1152 if (newsize > inode->i_size) {
1153 down_write(&iinfo->i_data_sem);
1154 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
1155 if (bsize <
1156 (udf_file_entry_alloc_offset(inode) + newsize)) {
1157 err = udf_expand_file_adinicb(inode);
1158 if (err)
1159 return err;
1160 down_write(&iinfo->i_data_sem);
1161 } else {
1162 iinfo->i_lenAlloc = newsize;
1163 goto set_size;
1164 }
1165 }
1166 err = udf_extend_file(inode, newsize);
1167 if (err) {
1168 up_write(&iinfo->i_data_sem);
1169 return err;
1170 }
1171set_size:
1172 truncate_setsize(inode, newsize);
1173 up_write(&iinfo->i_data_sem);
1174 } else {
1175 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
1176 down_write(&iinfo->i_data_sem);
1177 memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr + newsize,
1178 0x00, bsize - newsize -
1179 udf_file_entry_alloc_offset(inode));
1180 iinfo->i_lenAlloc = newsize;
1181 truncate_setsize(inode, newsize);
1182 up_write(&iinfo->i_data_sem);
1183 goto update_time;
1184 }
1185 err = block_truncate_page(inode->i_mapping, newsize,
1186 udf_get_block);
1187 if (err)
1188 return err;
1189 down_write(&iinfo->i_data_sem);
1190 truncate_setsize(inode, newsize);
1191 udf_truncate_extents(inode);
1192 up_write(&iinfo->i_data_sem);
1193 }
1194update_time:
1195 inode->i_mtime = inode->i_ctime = current_fs_time(inode->i_sb);
1196 if (IS_SYNC(inode))
1197 udf_sync_inode(inode);
1198 else
1199 mark_inode_dirty(inode);
1200 return 0;
1201}
1202
1203static void __udf_read_inode(struct inode *inode)
1204{
1205 struct buffer_head *bh = NULL;
1206 struct fileEntry *fe;
1207 uint16_t ident;
1208 struct udf_inode_info *iinfo = UDF_I(inode);
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222 bh = udf_read_ptagged(inode->i_sb, &iinfo->i_location, 0, &ident);
1223 if (!bh) {
1224 udf_err(inode->i_sb, "(ino %ld) failed !bh\n", inode->i_ino);
1225 make_bad_inode(inode);
1226 return;
1227 }
1228
1229 if (ident != TAG_IDENT_FE && ident != TAG_IDENT_EFE &&
1230 ident != TAG_IDENT_USE) {
1231 udf_err(inode->i_sb, "(ino %ld) failed ident=%d\n",
1232 inode->i_ino, ident);
1233 brelse(bh);
1234 make_bad_inode(inode);
1235 return;
1236 }
1237
1238 fe = (struct fileEntry *)bh->b_data;
1239
1240 if (fe->icbTag.strategyType == cpu_to_le16(4096)) {
1241 struct buffer_head *ibh;
1242
1243 ibh = udf_read_ptagged(inode->i_sb, &iinfo->i_location, 1,
1244 &ident);
1245 if (ident == TAG_IDENT_IE && ibh) {
1246 struct buffer_head *nbh = NULL;
1247 struct kernel_lb_addr loc;
1248 struct indirectEntry *ie;
1249
1250 ie = (struct indirectEntry *)ibh->b_data;
1251 loc = lelb_to_cpu(ie->indirectICB.extLocation);
1252
1253 if (ie->indirectICB.extLength &&
1254 (nbh = udf_read_ptagged(inode->i_sb, &loc, 0,
1255 &ident))) {
1256 if (ident == TAG_IDENT_FE ||
1257 ident == TAG_IDENT_EFE) {
1258 memcpy(&iinfo->i_location,
1259 &loc,
1260 sizeof(struct kernel_lb_addr));
1261 brelse(bh);
1262 brelse(ibh);
1263 brelse(nbh);
1264 __udf_read_inode(inode);
1265 return;
1266 }
1267 brelse(nbh);
1268 }
1269 }
1270 brelse(ibh);
1271 } else if (fe->icbTag.strategyType != cpu_to_le16(4)) {
1272 udf_err(inode->i_sb, "unsupported strategy type: %d\n",
1273 le16_to_cpu(fe->icbTag.strategyType));
1274 brelse(bh);
1275 make_bad_inode(inode);
1276 return;
1277 }
1278 udf_fill_inode(inode, bh);
1279
1280 brelse(bh);
1281}
1282
1283static void udf_fill_inode(struct inode *inode, struct buffer_head *bh)
1284{
1285 struct fileEntry *fe;
1286 struct extendedFileEntry *efe;
1287 struct udf_sb_info *sbi = UDF_SB(inode->i_sb);
1288 struct udf_inode_info *iinfo = UDF_I(inode);
1289 unsigned int link_count;
1290
1291 fe = (struct fileEntry *)bh->b_data;
1292 efe = (struct extendedFileEntry *)bh->b_data;
1293
1294 if (fe->icbTag.strategyType == cpu_to_le16(4))
1295 iinfo->i_strat4096 = 0;
1296 else
1297 iinfo->i_strat4096 = 1;
1298
1299 iinfo->i_alloc_type = le16_to_cpu(fe->icbTag.flags) &
1300 ICBTAG_FLAG_AD_MASK;
1301 iinfo->i_unique = 0;
1302 iinfo->i_lenEAttr = 0;
1303 iinfo->i_lenExtents = 0;
1304 iinfo->i_lenAlloc = 0;
1305 iinfo->i_next_alloc_block = 0;
1306 iinfo->i_next_alloc_goal = 0;
1307 if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_EFE)) {
1308 iinfo->i_efe = 1;
1309 iinfo->i_use = 0;
1310 if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize -
1311 sizeof(struct extendedFileEntry))) {
1312 make_bad_inode(inode);
1313 return;
1314 }
1315 memcpy(iinfo->i_ext.i_data,
1316 bh->b_data + sizeof(struct extendedFileEntry),
1317 inode->i_sb->s_blocksize -
1318 sizeof(struct extendedFileEntry));
1319 } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_FE)) {
1320 iinfo->i_efe = 0;
1321 iinfo->i_use = 0;
1322 if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize -
1323 sizeof(struct fileEntry))) {
1324 make_bad_inode(inode);
1325 return;
1326 }
1327 memcpy(iinfo->i_ext.i_data,
1328 bh->b_data + sizeof(struct fileEntry),
1329 inode->i_sb->s_blocksize - sizeof(struct fileEntry));
1330 } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_USE)) {
1331 iinfo->i_efe = 0;
1332 iinfo->i_use = 1;
1333 iinfo->i_lenAlloc = le32_to_cpu(
1334 ((struct unallocSpaceEntry *)bh->b_data)->
1335 lengthAllocDescs);
1336 if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize -
1337 sizeof(struct unallocSpaceEntry))) {
1338 make_bad_inode(inode);
1339 return;
1340 }
1341 memcpy(iinfo->i_ext.i_data,
1342 bh->b_data + sizeof(struct unallocSpaceEntry),
1343 inode->i_sb->s_blocksize -
1344 sizeof(struct unallocSpaceEntry));
1345 return;
1346 }
1347
1348 read_lock(&sbi->s_cred_lock);
1349 i_uid_write(inode, le32_to_cpu(fe->uid));
1350 if (!uid_valid(inode->i_uid) ||
1351 UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_IGNORE) ||
1352 UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_SET))
1353 inode->i_uid = UDF_SB(inode->i_sb)->s_uid;
1354
1355 i_gid_write(inode, le32_to_cpu(fe->gid));
1356 if (!gid_valid(inode->i_gid) ||
1357 UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_IGNORE) ||
1358 UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_SET))
1359 inode->i_gid = UDF_SB(inode->i_sb)->s_gid;
1360
1361 if (fe->icbTag.fileType != ICBTAG_FILE_TYPE_DIRECTORY &&
1362 sbi->s_fmode != UDF_INVALID_MODE)
1363 inode->i_mode = sbi->s_fmode;
1364 else if (fe->icbTag.fileType == ICBTAG_FILE_TYPE_DIRECTORY &&
1365 sbi->s_dmode != UDF_INVALID_MODE)
1366 inode->i_mode = sbi->s_dmode;
1367 else
1368 inode->i_mode = udf_convert_permissions(fe);
1369 inode->i_mode &= ~sbi->s_umask;
1370 read_unlock(&sbi->s_cred_lock);
1371
1372 link_count = le16_to_cpu(fe->fileLinkCount);
1373 if (!link_count)
1374 link_count = 1;
1375 set_nlink(inode, link_count);
1376
1377 inode->i_size = le64_to_cpu(fe->informationLength);
1378 iinfo->i_lenExtents = inode->i_size;
1379
1380 if (iinfo->i_efe == 0) {
1381 inode->i_blocks = le64_to_cpu(fe->logicalBlocksRecorded) <<
1382 (inode->i_sb->s_blocksize_bits - 9);
1383
1384 if (!udf_disk_stamp_to_time(&inode->i_atime, fe->accessTime))
1385 inode->i_atime = sbi->s_record_time;
1386
1387 if (!udf_disk_stamp_to_time(&inode->i_mtime,
1388 fe->modificationTime))
1389 inode->i_mtime = sbi->s_record_time;
1390
1391 if (!udf_disk_stamp_to_time(&inode->i_ctime, fe->attrTime))
1392 inode->i_ctime = sbi->s_record_time;
1393
1394 iinfo->i_unique = le64_to_cpu(fe->uniqueID);
1395 iinfo->i_lenEAttr = le32_to_cpu(fe->lengthExtendedAttr);
1396 iinfo->i_lenAlloc = le32_to_cpu(fe->lengthAllocDescs);
1397 iinfo->i_checkpoint = le32_to_cpu(fe->checkpoint);
1398 } else {
1399 inode->i_blocks = le64_to_cpu(efe->logicalBlocksRecorded) <<
1400 (inode->i_sb->s_blocksize_bits - 9);
1401
1402 if (!udf_disk_stamp_to_time(&inode->i_atime, efe->accessTime))
1403 inode->i_atime = sbi->s_record_time;
1404
1405 if (!udf_disk_stamp_to_time(&inode->i_mtime,
1406 efe->modificationTime))
1407 inode->i_mtime = sbi->s_record_time;
1408
1409 if (!udf_disk_stamp_to_time(&iinfo->i_crtime, efe->createTime))
1410 iinfo->i_crtime = sbi->s_record_time;
1411
1412 if (!udf_disk_stamp_to_time(&inode->i_ctime, efe->attrTime))
1413 inode->i_ctime = sbi->s_record_time;
1414
1415 iinfo->i_unique = le64_to_cpu(efe->uniqueID);
1416 iinfo->i_lenEAttr = le32_to_cpu(efe->lengthExtendedAttr);
1417 iinfo->i_lenAlloc = le32_to_cpu(efe->lengthAllocDescs);
1418 iinfo->i_checkpoint = le32_to_cpu(efe->checkpoint);
1419 }
1420
1421 switch (fe->icbTag.fileType) {
1422 case ICBTAG_FILE_TYPE_DIRECTORY:
1423 inode->i_op = &udf_dir_inode_operations;
1424 inode->i_fop = &udf_dir_operations;
1425 inode->i_mode |= S_IFDIR;
1426 inc_nlink(inode);
1427 break;
1428 case ICBTAG_FILE_TYPE_REALTIME:
1429 case ICBTAG_FILE_TYPE_REGULAR:
1430 case ICBTAG_FILE_TYPE_UNDEF:
1431 case ICBTAG_FILE_TYPE_VAT20:
1432 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
1433 inode->i_data.a_ops = &udf_adinicb_aops;
1434 else
1435 inode->i_data.a_ops = &udf_aops;
1436 inode->i_op = &udf_file_inode_operations;
1437 inode->i_fop = &udf_file_operations;
1438 inode->i_mode |= S_IFREG;
1439 break;
1440 case ICBTAG_FILE_TYPE_BLOCK:
1441 inode->i_mode |= S_IFBLK;
1442 break;
1443 case ICBTAG_FILE_TYPE_CHAR:
1444 inode->i_mode |= S_IFCHR;
1445 break;
1446 case ICBTAG_FILE_TYPE_FIFO:
1447 init_special_inode(inode, inode->i_mode | S_IFIFO, 0);
1448 break;
1449 case ICBTAG_FILE_TYPE_SOCKET:
1450 init_special_inode(inode, inode->i_mode | S_IFSOCK, 0);
1451 break;
1452 case ICBTAG_FILE_TYPE_SYMLINK:
1453 inode->i_data.a_ops = &udf_symlink_aops;
1454 inode->i_op = &udf_symlink_inode_operations;
1455 inode->i_mode = S_IFLNK | S_IRWXUGO;
1456 break;
1457 case ICBTAG_FILE_TYPE_MAIN:
1458 udf_debug("METADATA FILE-----\n");
1459 break;
1460 case ICBTAG_FILE_TYPE_MIRROR:
1461 udf_debug("METADATA MIRROR FILE-----\n");
1462 break;
1463 case ICBTAG_FILE_TYPE_BITMAP:
1464 udf_debug("METADATA BITMAP FILE-----\n");
1465 break;
1466 default:
1467 udf_err(inode->i_sb, "(ino %ld) failed unknown file type=%d\n",
1468 inode->i_ino, fe->icbTag.fileType);
1469 make_bad_inode(inode);
1470 return;
1471 }
1472 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
1473 struct deviceSpec *dsea =
1474 (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1);
1475 if (dsea) {
1476 init_special_inode(inode, inode->i_mode,
1477 MKDEV(le32_to_cpu(dsea->majorDeviceIdent),
1478 le32_to_cpu(dsea->minorDeviceIdent)));
1479
1480 } else
1481 make_bad_inode(inode);
1482 }
1483}
1484
1485static int udf_alloc_i_data(struct inode *inode, size_t size)
1486{
1487 struct udf_inode_info *iinfo = UDF_I(inode);
1488 iinfo->i_ext.i_data = kmalloc(size, GFP_KERNEL);
1489
1490 if (!iinfo->i_ext.i_data) {
1491 udf_err(inode->i_sb, "(ino %ld) no free memory\n",
1492 inode->i_ino);
1493 return -ENOMEM;
1494 }
1495
1496 return 0;
1497}
1498
1499static umode_t udf_convert_permissions(struct fileEntry *fe)
1500{
1501 umode_t mode;
1502 uint32_t permissions;
1503 uint32_t flags;
1504
1505 permissions = le32_to_cpu(fe->permissions);
1506 flags = le16_to_cpu(fe->icbTag.flags);
1507
1508 mode = ((permissions) & S_IRWXO) |
1509 ((permissions >> 2) & S_IRWXG) |
1510 ((permissions >> 4) & S_IRWXU) |
1511 ((flags & ICBTAG_FLAG_SETUID) ? S_ISUID : 0) |
1512 ((flags & ICBTAG_FLAG_SETGID) ? S_ISGID : 0) |
1513 ((flags & ICBTAG_FLAG_STICKY) ? S_ISVTX : 0);
1514
1515 return mode;
1516}
1517
1518int udf_write_inode(struct inode *inode, struct writeback_control *wbc)
1519{
1520 return udf_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL);
1521}
1522
1523static int udf_sync_inode(struct inode *inode)
1524{
1525 return udf_update_inode(inode, 1);
1526}
1527
1528static int udf_update_inode(struct inode *inode, int do_sync)
1529{
1530 struct buffer_head *bh = NULL;
1531 struct fileEntry *fe;
1532 struct extendedFileEntry *efe;
1533 uint64_t lb_recorded;
1534 uint32_t udfperms;
1535 uint16_t icbflags;
1536 uint16_t crclen;
1537 int err = 0;
1538 struct udf_sb_info *sbi = UDF_SB(inode->i_sb);
1539 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits;
1540 struct udf_inode_info *iinfo = UDF_I(inode);
1541
1542 bh = udf_tgetblk(inode->i_sb,
1543 udf_get_lb_pblock(inode->i_sb, &iinfo->i_location, 0));
1544 if (!bh) {
1545 udf_debug("getblk failure\n");
1546 return -ENOMEM;
1547 }
1548
1549 lock_buffer(bh);
1550 memset(bh->b_data, 0, inode->i_sb->s_blocksize);
1551 fe = (struct fileEntry *)bh->b_data;
1552 efe = (struct extendedFileEntry *)bh->b_data;
1553
1554 if (iinfo->i_use) {
1555 struct unallocSpaceEntry *use =
1556 (struct unallocSpaceEntry *)bh->b_data;
1557
1558 use->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc);
1559 memcpy(bh->b_data + sizeof(struct unallocSpaceEntry),
1560 iinfo->i_ext.i_data, inode->i_sb->s_blocksize -
1561 sizeof(struct unallocSpaceEntry));
1562 use->descTag.tagIdent = cpu_to_le16(TAG_IDENT_USE);
1563 use->descTag.tagLocation =
1564 cpu_to_le32(iinfo->i_location.logicalBlockNum);
1565 crclen = sizeof(struct unallocSpaceEntry) +
1566 iinfo->i_lenAlloc - sizeof(struct tag);
1567 use->descTag.descCRCLength = cpu_to_le16(crclen);
1568 use->descTag.descCRC = cpu_to_le16(crc_itu_t(0, (char *)use +
1569 sizeof(struct tag),
1570 crclen));
1571 use->descTag.tagChecksum = udf_tag_checksum(&use->descTag);
1572
1573 goto out;
1574 }
1575
1576 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_FORGET))
1577 fe->uid = cpu_to_le32(-1);
1578 else
1579 fe->uid = cpu_to_le32(i_uid_read(inode));
1580
1581 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_FORGET))
1582 fe->gid = cpu_to_le32(-1);
1583 else
1584 fe->gid = cpu_to_le32(i_gid_read(inode));
1585
1586 udfperms = ((inode->i_mode & S_IRWXO)) |
1587 ((inode->i_mode & S_IRWXG) << 2) |
1588 ((inode->i_mode & S_IRWXU) << 4);
1589
1590 udfperms |= (le32_to_cpu(fe->permissions) &
1591 (FE_PERM_O_DELETE | FE_PERM_O_CHATTR |
1592 FE_PERM_G_DELETE | FE_PERM_G_CHATTR |
1593 FE_PERM_U_DELETE | FE_PERM_U_CHATTR));
1594 fe->permissions = cpu_to_le32(udfperms);
1595
1596 if (S_ISDIR(inode->i_mode))
1597 fe->fileLinkCount = cpu_to_le16(inode->i_nlink - 1);
1598 else
1599 fe->fileLinkCount = cpu_to_le16(inode->i_nlink);
1600
1601 fe->informationLength = cpu_to_le64(inode->i_size);
1602
1603 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
1604 struct regid *eid;
1605 struct deviceSpec *dsea =
1606 (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1);
1607 if (!dsea) {
1608 dsea = (struct deviceSpec *)
1609 udf_add_extendedattr(inode,
1610 sizeof(struct deviceSpec) +
1611 sizeof(struct regid), 12, 0x3);
1612 dsea->attrType = cpu_to_le32(12);
1613 dsea->attrSubtype = 1;
1614 dsea->attrLength = cpu_to_le32(
1615 sizeof(struct deviceSpec) +
1616 sizeof(struct regid));
1617 dsea->impUseLength = cpu_to_le32(sizeof(struct regid));
1618 }
1619 eid = (struct regid *)dsea->impUse;
1620 memset(eid, 0, sizeof(struct regid));
1621 strcpy(eid->ident, UDF_ID_DEVELOPER);
1622 eid->identSuffix[0] = UDF_OS_CLASS_UNIX;
1623 eid->identSuffix[1] = UDF_OS_ID_LINUX;
1624 dsea->majorDeviceIdent = cpu_to_le32(imajor(inode));
1625 dsea->minorDeviceIdent = cpu_to_le32(iminor(inode));
1626 }
1627
1628 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
1629 lb_recorded = 0;
1630 else
1631 lb_recorded =
1632 (inode->i_blocks + (1 << (blocksize_bits - 9)) - 1) >>
1633 (blocksize_bits - 9);
1634
1635 if (iinfo->i_efe == 0) {
1636 memcpy(bh->b_data + sizeof(struct fileEntry),
1637 iinfo->i_ext.i_data,
1638 inode->i_sb->s_blocksize - sizeof(struct fileEntry));
1639 fe->logicalBlocksRecorded = cpu_to_le64(lb_recorded);
1640
1641 udf_time_to_disk_stamp(&fe->accessTime, inode->i_atime);
1642 udf_time_to_disk_stamp(&fe->modificationTime, inode->i_mtime);
1643 udf_time_to_disk_stamp(&fe->attrTime, inode->i_ctime);
1644 memset(&(fe->impIdent), 0, sizeof(struct regid));
1645 strcpy(fe->impIdent.ident, UDF_ID_DEVELOPER);
1646 fe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1647 fe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1648 fe->uniqueID = cpu_to_le64(iinfo->i_unique);
1649 fe->lengthExtendedAttr = cpu_to_le32(iinfo->i_lenEAttr);
1650 fe->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc);
1651 fe->checkpoint = cpu_to_le32(iinfo->i_checkpoint);
1652 fe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_FE);
1653 crclen = sizeof(struct fileEntry);
1654 } else {
1655 memcpy(bh->b_data + sizeof(struct extendedFileEntry),
1656 iinfo->i_ext.i_data,
1657 inode->i_sb->s_blocksize -
1658 sizeof(struct extendedFileEntry));
1659 efe->objectSize = cpu_to_le64(inode->i_size);
1660 efe->logicalBlocksRecorded = cpu_to_le64(lb_recorded);
1661
1662 if (iinfo->i_crtime.tv_sec > inode->i_atime.tv_sec ||
1663 (iinfo->i_crtime.tv_sec == inode->i_atime.tv_sec &&
1664 iinfo->i_crtime.tv_nsec > inode->i_atime.tv_nsec))
1665 iinfo->i_crtime = inode->i_atime;
1666
1667 if (iinfo->i_crtime.tv_sec > inode->i_mtime.tv_sec ||
1668 (iinfo->i_crtime.tv_sec == inode->i_mtime.tv_sec &&
1669 iinfo->i_crtime.tv_nsec > inode->i_mtime.tv_nsec))
1670 iinfo->i_crtime = inode->i_mtime;
1671
1672 if (iinfo->i_crtime.tv_sec > inode->i_ctime.tv_sec ||
1673 (iinfo->i_crtime.tv_sec == inode->i_ctime.tv_sec &&
1674 iinfo->i_crtime.tv_nsec > inode->i_ctime.tv_nsec))
1675 iinfo->i_crtime = inode->i_ctime;
1676
1677 udf_time_to_disk_stamp(&efe->accessTime, inode->i_atime);
1678 udf_time_to_disk_stamp(&efe->modificationTime, inode->i_mtime);
1679 udf_time_to_disk_stamp(&efe->createTime, iinfo->i_crtime);
1680 udf_time_to_disk_stamp(&efe->attrTime, inode->i_ctime);
1681
1682 memset(&(efe->impIdent), 0, sizeof(struct regid));
1683 strcpy(efe->impIdent.ident, UDF_ID_DEVELOPER);
1684 efe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1685 efe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1686 efe->uniqueID = cpu_to_le64(iinfo->i_unique);
1687 efe->lengthExtendedAttr = cpu_to_le32(iinfo->i_lenEAttr);
1688 efe->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc);
1689 efe->checkpoint = cpu_to_le32(iinfo->i_checkpoint);
1690 efe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_EFE);
1691 crclen = sizeof(struct extendedFileEntry);
1692 }
1693 if (iinfo->i_strat4096) {
1694 fe->icbTag.strategyType = cpu_to_le16(4096);
1695 fe->icbTag.strategyParameter = cpu_to_le16(1);
1696 fe->icbTag.numEntries = cpu_to_le16(2);
1697 } else {
1698 fe->icbTag.strategyType = cpu_to_le16(4);
1699 fe->icbTag.numEntries = cpu_to_le16(1);
1700 }
1701
1702 if (S_ISDIR(inode->i_mode))
1703 fe->icbTag.fileType = ICBTAG_FILE_TYPE_DIRECTORY;
1704 else if (S_ISREG(inode->i_mode))
1705 fe->icbTag.fileType = ICBTAG_FILE_TYPE_REGULAR;
1706 else if (S_ISLNK(inode->i_mode))
1707 fe->icbTag.fileType = ICBTAG_FILE_TYPE_SYMLINK;
1708 else if (S_ISBLK(inode->i_mode))
1709 fe->icbTag.fileType = ICBTAG_FILE_TYPE_BLOCK;
1710 else if (S_ISCHR(inode->i_mode))
1711 fe->icbTag.fileType = ICBTAG_FILE_TYPE_CHAR;
1712 else if (S_ISFIFO(inode->i_mode))
1713 fe->icbTag.fileType = ICBTAG_FILE_TYPE_FIFO;
1714 else if (S_ISSOCK(inode->i_mode))
1715 fe->icbTag.fileType = ICBTAG_FILE_TYPE_SOCKET;
1716
1717 icbflags = iinfo->i_alloc_type |
1718 ((inode->i_mode & S_ISUID) ? ICBTAG_FLAG_SETUID : 0) |
1719 ((inode->i_mode & S_ISGID) ? ICBTAG_FLAG_SETGID : 0) |
1720 ((inode->i_mode & S_ISVTX) ? ICBTAG_FLAG_STICKY : 0) |
1721 (le16_to_cpu(fe->icbTag.flags) &
1722 ~(ICBTAG_FLAG_AD_MASK | ICBTAG_FLAG_SETUID |
1723 ICBTAG_FLAG_SETGID | ICBTAG_FLAG_STICKY));
1724
1725 fe->icbTag.flags = cpu_to_le16(icbflags);
1726 if (sbi->s_udfrev >= 0x0200)
1727 fe->descTag.descVersion = cpu_to_le16(3);
1728 else
1729 fe->descTag.descVersion = cpu_to_le16(2);
1730 fe->descTag.tagSerialNum = cpu_to_le16(sbi->s_serial_number);
1731 fe->descTag.tagLocation = cpu_to_le32(
1732 iinfo->i_location.logicalBlockNum);
1733 crclen += iinfo->i_lenEAttr + iinfo->i_lenAlloc - sizeof(struct tag);
1734 fe->descTag.descCRCLength = cpu_to_le16(crclen);
1735 fe->descTag.descCRC = cpu_to_le16(crc_itu_t(0, (char *)fe + sizeof(struct tag),
1736 crclen));
1737 fe->descTag.tagChecksum = udf_tag_checksum(&fe->descTag);
1738
1739out:
1740 set_buffer_uptodate(bh);
1741 unlock_buffer(bh);
1742
1743
1744 mark_buffer_dirty(bh);
1745 if (do_sync) {
1746 sync_dirty_buffer(bh);
1747 if (buffer_write_io_error(bh)) {
1748 udf_warn(inode->i_sb, "IO error syncing udf inode [%08lx]\n",
1749 inode->i_ino);
1750 err = -EIO;
1751 }
1752 }
1753 brelse(bh);
1754
1755 return err;
1756}
1757
1758struct inode *udf_iget(struct super_block *sb, struct kernel_lb_addr *ino)
1759{
1760 unsigned long block = udf_get_lb_pblock(sb, ino, 0);
1761 struct inode *inode = iget_locked(sb, block);
1762
1763 if (!inode)
1764 return NULL;
1765
1766 if (inode->i_state & I_NEW) {
1767 memcpy(&UDF_I(inode)->i_location, ino, sizeof(struct kernel_lb_addr));
1768 __udf_read_inode(inode);
1769 unlock_new_inode(inode);
1770 }
1771
1772 if (is_bad_inode(inode))
1773 goto out_iput;
1774
1775 if (ino->logicalBlockNum >= UDF_SB(sb)->
1776 s_partmaps[ino->partitionReferenceNum].s_partition_len) {
1777 udf_debug("block=%d, partition=%d out of range\n",
1778 ino->logicalBlockNum, ino->partitionReferenceNum);
1779 make_bad_inode(inode);
1780 goto out_iput;
1781 }
1782
1783 return inode;
1784
1785 out_iput:
1786 iput(inode);
1787 return NULL;
1788}
1789
1790int udf_add_aext(struct inode *inode, struct extent_position *epos,
1791 struct kernel_lb_addr *eloc, uint32_t elen, int inc)
1792{
1793 int adsize;
1794 struct short_ad *sad = NULL;
1795 struct long_ad *lad = NULL;
1796 struct allocExtDesc *aed;
1797 uint8_t *ptr;
1798 struct udf_inode_info *iinfo = UDF_I(inode);
1799
1800 if (!epos->bh)
1801 ptr = iinfo->i_ext.i_data + epos->offset -
1802 udf_file_entry_alloc_offset(inode) +
1803 iinfo->i_lenEAttr;
1804 else
1805 ptr = epos->bh->b_data + epos->offset;
1806
1807 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
1808 adsize = sizeof(struct short_ad);
1809 else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
1810 adsize = sizeof(struct long_ad);
1811 else
1812 return -EIO;
1813
1814 if (epos->offset + (2 * adsize) > inode->i_sb->s_blocksize) {
1815 unsigned char *sptr, *dptr;
1816 struct buffer_head *nbh;
1817 int err, loffset;
1818 struct kernel_lb_addr obloc = epos->block;
1819
1820 epos->block.logicalBlockNum = udf_new_block(inode->i_sb, NULL,
1821 obloc.partitionReferenceNum,
1822 obloc.logicalBlockNum, &err);
1823 if (!epos->block.logicalBlockNum)
1824 return -ENOSPC;
1825 nbh = udf_tgetblk(inode->i_sb, udf_get_lb_pblock(inode->i_sb,
1826 &epos->block,
1827 0));
1828 if (!nbh)
1829 return -EIO;
1830 lock_buffer(nbh);
1831 memset(nbh->b_data, 0x00, inode->i_sb->s_blocksize);
1832 set_buffer_uptodate(nbh);
1833 unlock_buffer(nbh);
1834 mark_buffer_dirty_inode(nbh, inode);
1835
1836 aed = (struct allocExtDesc *)(nbh->b_data);
1837 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT))
1838 aed->previousAllocExtLocation =
1839 cpu_to_le32(obloc.logicalBlockNum);
1840 if (epos->offset + adsize > inode->i_sb->s_blocksize) {
1841 loffset = epos->offset;
1842 aed->lengthAllocDescs = cpu_to_le32(adsize);
1843 sptr = ptr - adsize;
1844 dptr = nbh->b_data + sizeof(struct allocExtDesc);
1845 memcpy(dptr, sptr, adsize);
1846 epos->offset = sizeof(struct allocExtDesc) + adsize;
1847 } else {
1848 loffset = epos->offset + adsize;
1849 aed->lengthAllocDescs = cpu_to_le32(0);
1850 sptr = ptr;
1851 epos->offset = sizeof(struct allocExtDesc);
1852
1853 if (epos->bh) {
1854 aed = (struct allocExtDesc *)epos->bh->b_data;
1855 le32_add_cpu(&aed->lengthAllocDescs, adsize);
1856 } else {
1857 iinfo->i_lenAlloc += adsize;
1858 mark_inode_dirty(inode);
1859 }
1860 }
1861 if (UDF_SB(inode->i_sb)->s_udfrev >= 0x0200)
1862 udf_new_tag(nbh->b_data, TAG_IDENT_AED, 3, 1,
1863 epos->block.logicalBlockNum, sizeof(struct tag));
1864 else
1865 udf_new_tag(nbh->b_data, TAG_IDENT_AED, 2, 1,
1866 epos->block.logicalBlockNum, sizeof(struct tag));
1867 switch (iinfo->i_alloc_type) {
1868 case ICBTAG_FLAG_AD_SHORT:
1869 sad = (struct short_ad *)sptr;
1870 sad->extLength = cpu_to_le32(EXT_NEXT_EXTENT_ALLOCDECS |
1871 inode->i_sb->s_blocksize);
1872 sad->extPosition =
1873 cpu_to_le32(epos->block.logicalBlockNum);
1874 break;
1875 case ICBTAG_FLAG_AD_LONG:
1876 lad = (struct long_ad *)sptr;
1877 lad->extLength = cpu_to_le32(EXT_NEXT_EXTENT_ALLOCDECS |
1878 inode->i_sb->s_blocksize);
1879 lad->extLocation = cpu_to_lelb(epos->block);
1880 memset(lad->impUse, 0x00, sizeof(lad->impUse));
1881 break;
1882 }
1883 if (epos->bh) {
1884 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
1885 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201)
1886 udf_update_tag(epos->bh->b_data, loffset);
1887 else
1888 udf_update_tag(epos->bh->b_data,
1889 sizeof(struct allocExtDesc));
1890 mark_buffer_dirty_inode(epos->bh, inode);
1891 brelse(epos->bh);
1892 } else {
1893 mark_inode_dirty(inode);
1894 }
1895 epos->bh = nbh;
1896 }
1897
1898 udf_write_aext(inode, epos, eloc, elen, inc);
1899
1900 if (!epos->bh) {
1901 iinfo->i_lenAlloc += adsize;
1902 mark_inode_dirty(inode);
1903 } else {
1904 aed = (struct allocExtDesc *)epos->bh->b_data;
1905 le32_add_cpu(&aed->lengthAllocDescs, adsize);
1906 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
1907 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201)
1908 udf_update_tag(epos->bh->b_data,
1909 epos->offset + (inc ? 0 : adsize));
1910 else
1911 udf_update_tag(epos->bh->b_data,
1912 sizeof(struct allocExtDesc));
1913 mark_buffer_dirty_inode(epos->bh, inode);
1914 }
1915
1916 return 0;
1917}
1918
1919void udf_write_aext(struct inode *inode, struct extent_position *epos,
1920 struct kernel_lb_addr *eloc, uint32_t elen, int inc)
1921{
1922 int adsize;
1923 uint8_t *ptr;
1924 struct short_ad *sad;
1925 struct long_ad *lad;
1926 struct udf_inode_info *iinfo = UDF_I(inode);
1927
1928 if (!epos->bh)
1929 ptr = iinfo->i_ext.i_data + epos->offset -
1930 udf_file_entry_alloc_offset(inode) +
1931 iinfo->i_lenEAttr;
1932 else
1933 ptr = epos->bh->b_data + epos->offset;
1934
1935 switch (iinfo->i_alloc_type) {
1936 case ICBTAG_FLAG_AD_SHORT:
1937 sad = (struct short_ad *)ptr;
1938 sad->extLength = cpu_to_le32(elen);
1939 sad->extPosition = cpu_to_le32(eloc->logicalBlockNum);
1940 adsize = sizeof(struct short_ad);
1941 break;
1942 case ICBTAG_FLAG_AD_LONG:
1943 lad = (struct long_ad *)ptr;
1944 lad->extLength = cpu_to_le32(elen);
1945 lad->extLocation = cpu_to_lelb(*eloc);
1946 memset(lad->impUse, 0x00, sizeof(lad->impUse));
1947 adsize = sizeof(struct long_ad);
1948 break;
1949 default:
1950 return;
1951 }
1952
1953 if (epos->bh) {
1954 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
1955 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) {
1956 struct allocExtDesc *aed =
1957 (struct allocExtDesc *)epos->bh->b_data;
1958 udf_update_tag(epos->bh->b_data,
1959 le32_to_cpu(aed->lengthAllocDescs) +
1960 sizeof(struct allocExtDesc));
1961 }
1962 mark_buffer_dirty_inode(epos->bh, inode);
1963 } else {
1964 mark_inode_dirty(inode);
1965 }
1966
1967 if (inc)
1968 epos->offset += adsize;
1969}
1970
1971int8_t udf_next_aext(struct inode *inode, struct extent_position *epos,
1972 struct kernel_lb_addr *eloc, uint32_t *elen, int inc)
1973{
1974 int8_t etype;
1975
1976 while ((etype = udf_current_aext(inode, epos, eloc, elen, inc)) ==
1977 (EXT_NEXT_EXTENT_ALLOCDECS >> 30)) {
1978 int block;
1979 epos->block = *eloc;
1980 epos->offset = sizeof(struct allocExtDesc);
1981 brelse(epos->bh);
1982 block = udf_get_lb_pblock(inode->i_sb, &epos->block, 0);
1983 epos->bh = udf_tread(inode->i_sb, block);
1984 if (!epos->bh) {
1985 udf_debug("reading block %d failed!\n", block);
1986 return -1;
1987 }
1988 }
1989
1990 return etype;
1991}
1992
1993int8_t udf_current_aext(struct inode *inode, struct extent_position *epos,
1994 struct kernel_lb_addr *eloc, uint32_t *elen, int inc)
1995{
1996 int alen;
1997 int8_t etype;
1998 uint8_t *ptr;
1999 struct short_ad *sad;
2000 struct long_ad *lad;
2001 struct udf_inode_info *iinfo = UDF_I(inode);
2002
2003 if (!epos->bh) {
2004 if (!epos->offset)
2005 epos->offset = udf_file_entry_alloc_offset(inode);
2006 ptr = iinfo->i_ext.i_data + epos->offset -
2007 udf_file_entry_alloc_offset(inode) +
2008 iinfo->i_lenEAttr;
2009 alen = udf_file_entry_alloc_offset(inode) +
2010 iinfo->i_lenAlloc;
2011 } else {
2012 if (!epos->offset)
2013 epos->offset = sizeof(struct allocExtDesc);
2014 ptr = epos->bh->b_data + epos->offset;
2015 alen = sizeof(struct allocExtDesc) +
2016 le32_to_cpu(((struct allocExtDesc *)epos->bh->b_data)->
2017 lengthAllocDescs);
2018 }
2019
2020 switch (iinfo->i_alloc_type) {
2021 case ICBTAG_FLAG_AD_SHORT:
2022 sad = udf_get_fileshortad(ptr, alen, &epos->offset, inc);
2023 if (!sad)
2024 return -1;
2025 etype = le32_to_cpu(sad->extLength) >> 30;
2026 eloc->logicalBlockNum = le32_to_cpu(sad->extPosition);
2027 eloc->partitionReferenceNum =
2028 iinfo->i_location.partitionReferenceNum;
2029 *elen = le32_to_cpu(sad->extLength) & UDF_EXTENT_LENGTH_MASK;
2030 break;
2031 case ICBTAG_FLAG_AD_LONG:
2032 lad = udf_get_filelongad(ptr, alen, &epos->offset, inc);
2033 if (!lad)
2034 return -1;
2035 etype = le32_to_cpu(lad->extLength) >> 30;
2036 *eloc = lelb_to_cpu(lad->extLocation);
2037 *elen = le32_to_cpu(lad->extLength) & UDF_EXTENT_LENGTH_MASK;
2038 break;
2039 default:
2040 udf_debug("alloc_type = %d unsupported\n", iinfo->i_alloc_type);
2041 return -1;
2042 }
2043
2044 return etype;
2045}
2046
2047static int8_t udf_insert_aext(struct inode *inode, struct extent_position epos,
2048 struct kernel_lb_addr neloc, uint32_t nelen)
2049{
2050 struct kernel_lb_addr oeloc;
2051 uint32_t oelen;
2052 int8_t etype;
2053
2054 if (epos.bh)
2055 get_bh(epos.bh);
2056
2057 while ((etype = udf_next_aext(inode, &epos, &oeloc, &oelen, 0)) != -1) {
2058 udf_write_aext(inode, &epos, &neloc, nelen, 1);
2059 neloc = oeloc;
2060 nelen = (etype << 30) | oelen;
2061 }
2062 udf_add_aext(inode, &epos, &neloc, nelen, 1);
2063 brelse(epos.bh);
2064
2065 return (nelen >> 30);
2066}
2067
2068int8_t udf_delete_aext(struct inode *inode, struct extent_position epos,
2069 struct kernel_lb_addr eloc, uint32_t elen)
2070{
2071 struct extent_position oepos;
2072 int adsize;
2073 int8_t etype;
2074 struct allocExtDesc *aed;
2075 struct udf_inode_info *iinfo;
2076
2077 if (epos.bh) {
2078 get_bh(epos.bh);
2079 get_bh(epos.bh);
2080 }
2081
2082 iinfo = UDF_I(inode);
2083 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
2084 adsize = sizeof(struct short_ad);
2085 else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
2086 adsize = sizeof(struct long_ad);
2087 else
2088 adsize = 0;
2089
2090 oepos = epos;
2091 if (udf_next_aext(inode, &epos, &eloc, &elen, 1) == -1)
2092 return -1;
2093
2094 while ((etype = udf_next_aext(inode, &epos, &eloc, &elen, 1)) != -1) {
2095 udf_write_aext(inode, &oepos, &eloc, (etype << 30) | elen, 1);
2096 if (oepos.bh != epos.bh) {
2097 oepos.block = epos.block;
2098 brelse(oepos.bh);
2099 get_bh(epos.bh);
2100 oepos.bh = epos.bh;
2101 oepos.offset = epos.offset - adsize;
2102 }
2103 }
2104 memset(&eloc, 0x00, sizeof(struct kernel_lb_addr));
2105 elen = 0;
2106
2107 if (epos.bh != oepos.bh) {
2108 udf_free_blocks(inode->i_sb, inode, &epos.block, 0, 1);
2109 udf_write_aext(inode, &oepos, &eloc, elen, 1);
2110 udf_write_aext(inode, &oepos, &eloc, elen, 1);
2111 if (!oepos.bh) {
2112 iinfo->i_lenAlloc -= (adsize * 2);
2113 mark_inode_dirty(inode);
2114 } else {
2115 aed = (struct allocExtDesc *)oepos.bh->b_data;
2116 le32_add_cpu(&aed->lengthAllocDescs, -(2 * adsize));
2117 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
2118 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201)
2119 udf_update_tag(oepos.bh->b_data,
2120 oepos.offset - (2 * adsize));
2121 else
2122 udf_update_tag(oepos.bh->b_data,
2123 sizeof(struct allocExtDesc));
2124 mark_buffer_dirty_inode(oepos.bh, inode);
2125 }
2126 } else {
2127 udf_write_aext(inode, &oepos, &eloc, elen, 1);
2128 if (!oepos.bh) {
2129 iinfo->i_lenAlloc -= adsize;
2130 mark_inode_dirty(inode);
2131 } else {
2132 aed = (struct allocExtDesc *)oepos.bh->b_data;
2133 le32_add_cpu(&aed->lengthAllocDescs, -adsize);
2134 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
2135 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201)
2136 udf_update_tag(oepos.bh->b_data,
2137 epos.offset - adsize);
2138 else
2139 udf_update_tag(oepos.bh->b_data,
2140 sizeof(struct allocExtDesc));
2141 mark_buffer_dirty_inode(oepos.bh, inode);
2142 }
2143 }
2144
2145 brelse(epos.bh);
2146 brelse(oepos.bh);
2147
2148 return (elen >> 30);
2149}
2150
2151int8_t inode_bmap(struct inode *inode, sector_t block,
2152 struct extent_position *pos, struct kernel_lb_addr *eloc,
2153 uint32_t *elen, sector_t *offset)
2154{
2155 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits;
2156 loff_t lbcount = 0, bcount =
2157 (loff_t) block << blocksize_bits;
2158 int8_t etype;
2159 struct udf_inode_info *iinfo;
2160
2161 iinfo = UDF_I(inode);
2162 pos->offset = 0;
2163 pos->block = iinfo->i_location;
2164 pos->bh = NULL;
2165 *elen = 0;
2166
2167 do {
2168 etype = udf_next_aext(inode, pos, eloc, elen, 1);
2169 if (etype == -1) {
2170 *offset = (bcount - lbcount) >> blocksize_bits;
2171 iinfo->i_lenExtents = lbcount;
2172 return -1;
2173 }
2174 lbcount += *elen;
2175 } while (lbcount <= bcount);
2176
2177 *offset = (bcount + *elen - lbcount) >> blocksize_bits;
2178
2179 return etype;
2180}
2181
2182long udf_block_map(struct inode *inode, sector_t block)
2183{
2184 struct kernel_lb_addr eloc;
2185 uint32_t elen;
2186 sector_t offset;
2187 struct extent_position epos = {};
2188 int ret;
2189
2190 down_read(&UDF_I(inode)->i_data_sem);
2191
2192 if (inode_bmap(inode, block, &epos, &eloc, &elen, &offset) ==
2193 (EXT_RECORDED_ALLOCATED >> 30))
2194 ret = udf_get_lb_pblock(inode->i_sb, &eloc, offset);
2195 else
2196 ret = 0;
2197
2198 up_read(&UDF_I(inode)->i_data_sem);
2199 brelse(epos.bh);
2200
2201 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_VARCONV))
2202 return udf_fixed_to_variable(ret);
2203 else
2204 return ret;
2205}
2206
