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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/writeback.h>
37#include <linux/slab.h>
38#include <linux/crc-itu-t.h>
39#include <linux/mpage.h>
40#include <linux/uio.h>
41#include <linux/bio.h>
42
43#include "udf_i.h"
44#include "udf_sb.h"
45
46#define EXTENT_MERGE_SIZE 5
47
48static umode_t udf_convert_permissions(struct fileEntry *);
49static int udf_update_inode(struct inode *, int);
50static int udf_sync_inode(struct inode *inode);
51static int udf_alloc_i_data(struct inode *inode, size_t size);
52static sector_t inode_getblk(struct inode *, sector_t, int *, int *);
53static int8_t udf_insert_aext(struct inode *, struct extent_position,
54 struct kernel_lb_addr, uint32_t);
55static void udf_split_extents(struct inode *, int *, int, udf_pblk_t,
56 struct kernel_long_ad *, int *);
57static void udf_prealloc_extents(struct inode *, int, int,
58 struct kernel_long_ad *, int *);
59static void udf_merge_extents(struct inode *, struct kernel_long_ad *, int *);
60static void udf_update_extents(struct inode *, struct kernel_long_ad *, int,
61 int, struct extent_position *);
62static int udf_get_block(struct inode *, sector_t, struct buffer_head *, int);
63
64static void __udf_clear_extent_cache(struct inode *inode)
65{
66 struct udf_inode_info *iinfo = UDF_I(inode);
67
68 if (iinfo->cached_extent.lstart != -1) {
69 brelse(iinfo->cached_extent.epos.bh);
70 iinfo->cached_extent.lstart = -1;
71 }
72}
73
74
75static void udf_clear_extent_cache(struct inode *inode)
76{
77 struct udf_inode_info *iinfo = UDF_I(inode);
78
79 spin_lock(&iinfo->i_extent_cache_lock);
80 __udf_clear_extent_cache(inode);
81 spin_unlock(&iinfo->i_extent_cache_lock);
82}
83
84
85static int udf_read_extent_cache(struct inode *inode, loff_t bcount,
86 loff_t *lbcount, struct extent_position *pos)
87{
88 struct udf_inode_info *iinfo = UDF_I(inode);
89 int ret = 0;
90
91 spin_lock(&iinfo->i_extent_cache_lock);
92 if ((iinfo->cached_extent.lstart <= bcount) &&
93 (iinfo->cached_extent.lstart != -1)) {
94
95 *lbcount = iinfo->cached_extent.lstart;
96 memcpy(pos, &iinfo->cached_extent.epos,
97 sizeof(struct extent_position));
98 if (pos->bh)
99 get_bh(pos->bh);
100 ret = 1;
101 }
102 spin_unlock(&iinfo->i_extent_cache_lock);
103 return ret;
104}
105
106
107static void udf_update_extent_cache(struct inode *inode, loff_t estart,
108 struct extent_position *pos)
109{
110 struct udf_inode_info *iinfo = UDF_I(inode);
111
112 spin_lock(&iinfo->i_extent_cache_lock);
113
114 __udf_clear_extent_cache(inode);
115 if (pos->bh)
116 get_bh(pos->bh);
117 memcpy(&iinfo->cached_extent.epos, pos, sizeof(*pos));
118 iinfo->cached_extent.lstart = estart;
119 switch (iinfo->i_alloc_type) {
120 case ICBTAG_FLAG_AD_SHORT:
121 iinfo->cached_extent.epos.offset -= sizeof(struct short_ad);
122 break;
123 case ICBTAG_FLAG_AD_LONG:
124 iinfo->cached_extent.epos.offset -= sizeof(struct long_ad);
125 break;
126 }
127 spin_unlock(&iinfo->i_extent_cache_lock);
128}
129
130void udf_evict_inode(struct inode *inode)
131{
132 struct udf_inode_info *iinfo = UDF_I(inode);
133 int want_delete = 0;
134
135 if (!inode->i_nlink && !is_bad_inode(inode)) {
136 want_delete = 1;
137 udf_setsize(inode, 0);
138 udf_update_inode(inode, IS_SYNC(inode));
139 }
140 truncate_inode_pages_final(&inode->i_data);
141 invalidate_inode_buffers(inode);
142 clear_inode(inode);
143 if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB &&
144 inode->i_size != iinfo->i_lenExtents) {
145 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",
146 inode->i_ino, inode->i_mode,
147 (unsigned long long)inode->i_size,
148 (unsigned long long)iinfo->i_lenExtents);
149 }
150 kfree(iinfo->i_ext.i_data);
151 iinfo->i_ext.i_data = NULL;
152 udf_clear_extent_cache(inode);
153 if (want_delete) {
154 udf_free_inode(inode);
155 }
156}
157
158static void udf_write_failed(struct address_space *mapping, loff_t to)
159{
160 struct inode *inode = mapping->host;
161 struct udf_inode_info *iinfo = UDF_I(inode);
162 loff_t isize = inode->i_size;
163
164 if (to > isize) {
165 truncate_pagecache(inode, isize);
166 if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
167 down_write(&iinfo->i_data_sem);
168 udf_clear_extent_cache(inode);
169 udf_truncate_extents(inode);
170 up_write(&iinfo->i_data_sem);
171 }
172 }
173}
174
175static int udf_writepage(struct page *page, struct writeback_control *wbc)
176{
177 return block_write_full_page(page, udf_get_block, wbc);
178}
179
180static int udf_writepages(struct address_space *mapping,
181 struct writeback_control *wbc)
182{
183 return mpage_writepages(mapping, wbc, udf_get_block);
184}
185
186static int udf_readpage(struct file *file, struct page *page)
187{
188 return mpage_readpage(page, udf_get_block);
189}
190
191static int udf_readpages(struct file *file, struct address_space *mapping,
192 struct list_head *pages, unsigned nr_pages)
193{
194 return mpage_readpages(mapping, pages, nr_pages, udf_get_block);
195}
196
197static int udf_write_begin(struct file *file, struct address_space *mapping,
198 loff_t pos, unsigned len, unsigned flags,
199 struct page **pagep, void **fsdata)
200{
201 int ret;
202
203 ret = block_write_begin(mapping, pos, len, flags, pagep, udf_get_block);
204 if (unlikely(ret))
205 udf_write_failed(mapping, pos + len);
206 return ret;
207}
208
209static ssize_t udf_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
210{
211 struct file *file = iocb->ki_filp;
212 struct address_space *mapping = file->f_mapping;
213 struct inode *inode = mapping->host;
214 size_t count = iov_iter_count(iter);
215 ssize_t ret;
216
217 ret = blockdev_direct_IO(iocb, inode, iter, udf_get_block);
218 if (unlikely(ret < 0 && iov_iter_rw(iter) == WRITE))
219 udf_write_failed(mapping, iocb->ki_pos + count);
220 return ret;
221}
222
223static sector_t udf_bmap(struct address_space *mapping, sector_t block)
224{
225 return generic_block_bmap(mapping, block, udf_get_block);
226}
227
228const struct address_space_operations udf_aops = {
229 .readpage = udf_readpage,
230 .readpages = udf_readpages,
231 .writepage = udf_writepage,
232 .writepages = udf_writepages,
233 .write_begin = udf_write_begin,
234 .write_end = generic_write_end,
235 .direct_IO = udf_direct_IO,
236 .bmap = udf_bmap,
237};
238
239
240
241
242
243
244
245int udf_expand_file_adinicb(struct inode *inode)
246{
247 struct page *page;
248 char *kaddr;
249 struct udf_inode_info *iinfo = UDF_I(inode);
250 int err;
251 struct writeback_control udf_wbc = {
252 .sync_mode = WB_SYNC_NONE,
253 .nr_to_write = 1,
254 };
255
256 WARN_ON_ONCE(!inode_is_locked(inode));
257 if (!iinfo->i_lenAlloc) {
258 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))
259 iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT;
260 else
261 iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG;
262
263 inode->i_data.a_ops = &udf_aops;
264 up_write(&iinfo->i_data_sem);
265 mark_inode_dirty(inode);
266 return 0;
267 }
268
269
270
271
272 up_write(&iinfo->i_data_sem);
273
274 page = find_or_create_page(inode->i_mapping, 0, GFP_NOFS);
275 if (!page)
276 return -ENOMEM;
277
278 if (!PageUptodate(page)) {
279 kaddr = kmap_atomic(page);
280 memset(kaddr + iinfo->i_lenAlloc, 0x00,
281 PAGE_SIZE - iinfo->i_lenAlloc);
282 memcpy(kaddr, iinfo->i_ext.i_data + iinfo->i_lenEAttr,
283 iinfo->i_lenAlloc);
284 flush_dcache_page(page);
285 SetPageUptodate(page);
286 kunmap_atomic(kaddr);
287 }
288 down_write(&iinfo->i_data_sem);
289 memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr, 0x00,
290 iinfo->i_lenAlloc);
291 iinfo->i_lenAlloc = 0;
292 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))
293 iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT;
294 else
295 iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG;
296
297 inode->i_data.a_ops = &udf_aops;
298 up_write(&iinfo->i_data_sem);
299 err = inode->i_data.a_ops->writepage(page, &udf_wbc);
300 if (err) {
301
302 lock_page(page);
303 down_write(&iinfo->i_data_sem);
304 kaddr = kmap_atomic(page);
305 memcpy(iinfo->i_ext.i_data + iinfo->i_lenEAttr, kaddr,
306 inode->i_size);
307 kunmap_atomic(kaddr);
308 unlock_page(page);
309 iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB;
310 inode->i_data.a_ops = &udf_adinicb_aops;
311 up_write(&iinfo->i_data_sem);
312 }
313 put_page(page);
314 mark_inode_dirty(inode);
315
316 return err;
317}
318
319struct buffer_head *udf_expand_dir_adinicb(struct inode *inode,
320 udf_pblk_t *block, int *err)
321{
322 udf_pblk_t newblock;
323 struct buffer_head *dbh = NULL;
324 struct kernel_lb_addr eloc;
325 uint8_t alloctype;
326 struct extent_position epos;
327
328 struct udf_fileident_bh sfibh, dfibh;
329 loff_t f_pos = udf_ext0_offset(inode);
330 int size = udf_ext0_offset(inode) + inode->i_size;
331 struct fileIdentDesc cfi, *sfi, *dfi;
332 struct udf_inode_info *iinfo = UDF_I(inode);
333
334 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))
335 alloctype = ICBTAG_FLAG_AD_SHORT;
336 else
337 alloctype = ICBTAG_FLAG_AD_LONG;
338
339 if (!inode->i_size) {
340 iinfo->i_alloc_type = alloctype;
341 mark_inode_dirty(inode);
342 return NULL;
343 }
344
345
346 *block = udf_new_block(inode->i_sb, inode,
347 iinfo->i_location.partitionReferenceNum,
348 iinfo->i_location.logicalBlockNum, err);
349 if (!(*block))
350 return NULL;
351 newblock = udf_get_pblock(inode->i_sb, *block,
352 iinfo->i_location.partitionReferenceNum,
353 0);
354 if (!newblock)
355 return NULL;
356 dbh = udf_tgetblk(inode->i_sb, newblock);
357 if (!dbh)
358 return NULL;
359 lock_buffer(dbh);
360 memset(dbh->b_data, 0x00, inode->i_sb->s_blocksize);
361 set_buffer_uptodate(dbh);
362 unlock_buffer(dbh);
363 mark_buffer_dirty_inode(dbh, inode);
364
365 sfibh.soffset = sfibh.eoffset =
366 f_pos & (inode->i_sb->s_blocksize - 1);
367 sfibh.sbh = sfibh.ebh = NULL;
368 dfibh.soffset = dfibh.eoffset = 0;
369 dfibh.sbh = dfibh.ebh = dbh;
370 while (f_pos < size) {
371 iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB;
372 sfi = udf_fileident_read(inode, &f_pos, &sfibh, &cfi, NULL,
373 NULL, NULL, NULL);
374 if (!sfi) {
375 brelse(dbh);
376 return NULL;
377 }
378 iinfo->i_alloc_type = alloctype;
379 sfi->descTag.tagLocation = cpu_to_le32(*block);
380 dfibh.soffset = dfibh.eoffset;
381 dfibh.eoffset += (sfibh.eoffset - sfibh.soffset);
382 dfi = (struct fileIdentDesc *)(dbh->b_data + dfibh.soffset);
383 if (udf_write_fi(inode, sfi, dfi, &dfibh, sfi->impUse,
384 sfi->fileIdent +
385 le16_to_cpu(sfi->lengthOfImpUse))) {
386 iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB;
387 brelse(dbh);
388 return NULL;
389 }
390 }
391 mark_buffer_dirty_inode(dbh, inode);
392
393 memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr, 0,
394 iinfo->i_lenAlloc);
395 iinfo->i_lenAlloc = 0;
396 eloc.logicalBlockNum = *block;
397 eloc.partitionReferenceNum =
398 iinfo->i_location.partitionReferenceNum;
399 iinfo->i_lenExtents = inode->i_size;
400 epos.bh = NULL;
401 epos.block = iinfo->i_location;
402 epos.offset = udf_file_entry_alloc_offset(inode);
403 udf_add_aext(inode, &epos, &eloc, inode->i_size, 0);
404
405
406 brelse(epos.bh);
407 mark_inode_dirty(inode);
408 return dbh;
409}
410
411static int udf_get_block(struct inode *inode, sector_t block,
412 struct buffer_head *bh_result, int create)
413{
414 int err, new;
415 sector_t phys = 0;
416 struct udf_inode_info *iinfo;
417
418 if (!create) {
419 phys = udf_block_map(inode, block);
420 if (phys)
421 map_bh(bh_result, inode->i_sb, phys);
422 return 0;
423 }
424
425 err = -EIO;
426 new = 0;
427 iinfo = UDF_I(inode);
428
429 down_write(&iinfo->i_data_sem);
430 if (block == iinfo->i_next_alloc_block + 1) {
431 iinfo->i_next_alloc_block++;
432 iinfo->i_next_alloc_goal++;
433 }
434
435 udf_clear_extent_cache(inode);
436 phys = inode_getblk(inode, block, &err, &new);
437 if (!phys)
438 goto abort;
439
440 if (new)
441 set_buffer_new(bh_result);
442 map_bh(bh_result, inode->i_sb, phys);
443
444abort:
445 up_write(&iinfo->i_data_sem);
446 return err;
447}
448
449static struct buffer_head *udf_getblk(struct inode *inode, udf_pblk_t block,
450 int create, int *err)
451{
452 struct buffer_head *bh;
453 struct buffer_head dummy;
454
455 dummy.b_state = 0;
456 dummy.b_blocknr = -1000;
457 *err = udf_get_block(inode, block, &dummy, create);
458 if (!*err && buffer_mapped(&dummy)) {
459 bh = sb_getblk(inode->i_sb, dummy.b_blocknr);
460 if (buffer_new(&dummy)) {
461 lock_buffer(bh);
462 memset(bh->b_data, 0x00, inode->i_sb->s_blocksize);
463 set_buffer_uptodate(bh);
464 unlock_buffer(bh);
465 mark_buffer_dirty_inode(bh, inode);
466 }
467 return bh;
468 }
469
470 return NULL;
471}
472
473
474static int udf_do_extend_file(struct inode *inode,
475 struct extent_position *last_pos,
476 struct kernel_long_ad *last_ext,
477 sector_t blocks)
478{
479 sector_t add;
480 int count = 0, fake = !(last_ext->extLength & UDF_EXTENT_LENGTH_MASK);
481 struct super_block *sb = inode->i_sb;
482 struct kernel_lb_addr prealloc_loc = {};
483 uint32_t prealloc_len = 0;
484 struct udf_inode_info *iinfo;
485 int err;
486
487
488
489 if (!blocks && fake)
490 return 0;
491
492 iinfo = UDF_I(inode);
493
494 if (last_ext->extLength & (sb->s_blocksize - 1)) {
495 last_ext->extLength =
496 (last_ext->extLength & UDF_EXTENT_FLAG_MASK) |
497 (((last_ext->extLength & UDF_EXTENT_LENGTH_MASK) +
498 sb->s_blocksize - 1) & ~(sb->s_blocksize - 1));
499 iinfo->i_lenExtents =
500 (iinfo->i_lenExtents + sb->s_blocksize - 1) &
501 ~(sb->s_blocksize - 1);
502 }
503
504
505 if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) ==
506 EXT_NOT_RECORDED_ALLOCATED) {
507
508 prealloc_loc = last_ext->extLocation;
509 prealloc_len = last_ext->extLength;
510
511 last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED |
512 (last_ext->extLength & UDF_EXTENT_LENGTH_MASK);
513 last_ext->extLocation.logicalBlockNum = 0;
514 last_ext->extLocation.partitionReferenceNum = 0;
515 }
516
517
518 if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) ==
519 EXT_NOT_RECORDED_NOT_ALLOCATED) {
520 add = ((1 << 30) - sb->s_blocksize -
521 (last_ext->extLength & UDF_EXTENT_LENGTH_MASK)) >>
522 sb->s_blocksize_bits;
523 if (add > blocks)
524 add = blocks;
525 blocks -= add;
526 last_ext->extLength += add << sb->s_blocksize_bits;
527 }
528
529 if (fake) {
530 udf_add_aext(inode, last_pos, &last_ext->extLocation,
531 last_ext->extLength, 1);
532 count++;
533 } else {
534 struct kernel_lb_addr tmploc;
535 uint32_t tmplen;
536
537 udf_write_aext(inode, last_pos, &last_ext->extLocation,
538 last_ext->extLength, 1);
539
540
541
542
543 udf_next_aext(inode, last_pos, &tmploc, &tmplen, 0);
544 }
545
546
547 if (!blocks)
548 goto out;
549
550
551 last_ext->extLocation.logicalBlockNum = 0;
552 last_ext->extLocation.partitionReferenceNum = 0;
553 add = (1 << (30-sb->s_blocksize_bits)) - 1;
554 last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED |
555 (add << sb->s_blocksize_bits);
556
557
558 while (blocks > add) {
559 blocks -= add;
560 err = udf_add_aext(inode, last_pos, &last_ext->extLocation,
561 last_ext->extLength, 1);
562 if (err)
563 return err;
564 count++;
565 }
566 if (blocks) {
567 last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED |
568 (blocks << sb->s_blocksize_bits);
569 err = udf_add_aext(inode, last_pos, &last_ext->extLocation,
570 last_ext->extLength, 1);
571 if (err)
572 return err;
573 count++;
574 }
575
576out:
577
578 if (prealloc_len) {
579 err = udf_add_aext(inode, last_pos, &prealloc_loc,
580 prealloc_len, 1);
581 if (err)
582 return err;
583 last_ext->extLocation = prealloc_loc;
584 last_ext->extLength = prealloc_len;
585 count++;
586 }
587
588
589 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
590 last_pos->offset -= sizeof(struct short_ad);
591 else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
592 last_pos->offset -= sizeof(struct long_ad);
593 else
594 return -EIO;
595
596 return count;
597}
598
599static int udf_extend_file(struct inode *inode, loff_t newsize)
600{
601
602 struct extent_position epos;
603 struct kernel_lb_addr eloc;
604 uint32_t elen;
605 int8_t etype;
606 struct super_block *sb = inode->i_sb;
607 sector_t first_block = newsize >> sb->s_blocksize_bits, offset;
608 int adsize;
609 struct udf_inode_info *iinfo = UDF_I(inode);
610 struct kernel_long_ad extent;
611 int err;
612
613 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
614 adsize = sizeof(struct short_ad);
615 else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
616 adsize = sizeof(struct long_ad);
617 else
618 BUG();
619
620 etype = inode_bmap(inode, first_block, &epos, &eloc, &elen, &offset);
621
622
623
624 if (etype != -1)
625 return 0;
626 if (newsize & (sb->s_blocksize - 1))
627 offset++;
628
629 if (offset == 0)
630 return 0;
631
632
633 if ((!epos.bh && epos.offset == udf_file_entry_alloc_offset(inode)) ||
634 (epos.bh && epos.offset == sizeof(struct allocExtDesc))) {
635
636
637 extent.extLocation.logicalBlockNum = 0;
638 extent.extLocation.partitionReferenceNum = 0;
639 extent.extLength = EXT_NOT_RECORDED_NOT_ALLOCATED;
640 } else {
641 epos.offset -= adsize;
642 etype = udf_next_aext(inode, &epos, &extent.extLocation,
643 &extent.extLength, 0);
644 extent.extLength |= etype << 30;
645 }
646 err = udf_do_extend_file(inode, &epos, &extent, offset);
647 if (err < 0)
648 goto out;
649 err = 0;
650 iinfo->i_lenExtents = newsize;
651out:
652 brelse(epos.bh);
653 return err;
654}
655
656static sector_t inode_getblk(struct inode *inode, sector_t block,
657 int *err, int *new)
658{
659 struct kernel_long_ad laarr[EXTENT_MERGE_SIZE];
660 struct extent_position prev_epos, cur_epos, next_epos;
661 int count = 0, startnum = 0, endnum = 0;
662 uint32_t elen = 0, tmpelen;
663 struct kernel_lb_addr eloc, tmpeloc;
664 int c = 1;
665 loff_t lbcount = 0, b_off = 0;
666 udf_pblk_t newblocknum, newblock;
667 sector_t offset = 0;
668 int8_t etype;
669 struct udf_inode_info *iinfo = UDF_I(inode);
670 udf_pblk_t goal = 0, pgoal = iinfo->i_location.logicalBlockNum;
671 int lastblock = 0;
672 bool isBeyondEOF;
673
674 *err = 0;
675 *new = 0;
676 prev_epos.offset = udf_file_entry_alloc_offset(inode);
677 prev_epos.block = iinfo->i_location;
678 prev_epos.bh = NULL;
679 cur_epos = next_epos = prev_epos;
680 b_off = (loff_t)block << inode->i_sb->s_blocksize_bits;
681
682
683
684
685 do {
686 if (prev_epos.bh != cur_epos.bh) {
687 brelse(prev_epos.bh);
688 get_bh(cur_epos.bh);
689 prev_epos.bh = cur_epos.bh;
690 }
691 if (cur_epos.bh != next_epos.bh) {
692 brelse(cur_epos.bh);
693 get_bh(next_epos.bh);
694 cur_epos.bh = next_epos.bh;
695 }
696
697 lbcount += elen;
698
699 prev_epos.block = cur_epos.block;
700 cur_epos.block = next_epos.block;
701
702 prev_epos.offset = cur_epos.offset;
703 cur_epos.offset = next_epos.offset;
704
705 etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 1);
706 if (etype == -1)
707 break;
708
709 c = !c;
710
711 laarr[c].extLength = (etype << 30) | elen;
712 laarr[c].extLocation = eloc;
713
714 if (etype != (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))
715 pgoal = eloc.logicalBlockNum +
716 ((elen + inode->i_sb->s_blocksize - 1) >>
717 inode->i_sb->s_blocksize_bits);
718
719 count++;
720 } while (lbcount + elen <= b_off);
721
722 b_off -= lbcount;
723 offset = b_off >> inode->i_sb->s_blocksize_bits;
724
725
726
727
728 udf_next_aext(inode, &prev_epos, &tmpeloc, &tmpelen, 0);
729 udf_next_aext(inode, &cur_epos, &tmpeloc, &tmpelen, 0);
730
731
732
733
734 if (etype == (EXT_RECORDED_ALLOCATED >> 30)) {
735 if (elen & (inode->i_sb->s_blocksize - 1)) {
736 elen = EXT_RECORDED_ALLOCATED |
737 ((elen + inode->i_sb->s_blocksize - 1) &
738 ~(inode->i_sb->s_blocksize - 1));
739 udf_write_aext(inode, &cur_epos, &eloc, elen, 1);
740 }
741 newblock = udf_get_lb_pblock(inode->i_sb, &eloc, offset);
742 goto out_free;
743 }
744
745
746 if (etype == -1) {
747 int ret;
748 isBeyondEOF = true;
749 if (count) {
750 if (c)
751 laarr[0] = laarr[1];
752 startnum = 1;
753 } else {
754
755 memset(&laarr[0].extLocation, 0x00,
756 sizeof(struct kernel_lb_addr));
757 laarr[0].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED;
758
759
760 startnum = (offset > 0);
761 }
762
763 ret = udf_do_extend_file(inode, &prev_epos, laarr, offset);
764 if (ret < 0) {
765 *err = ret;
766 newblock = 0;
767 goto out_free;
768 }
769 c = 0;
770 offset = 0;
771 count += ret;
772
773 if ((laarr[0].extLength & UDF_EXTENT_FLAG_MASK) !=
774 EXT_NOT_RECORDED_ALLOCATED) {
775
776
777 if (count)
778 c = !c;
779 laarr[c].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED |
780 inode->i_sb->s_blocksize;
781 memset(&laarr[c].extLocation, 0x00,
782 sizeof(struct kernel_lb_addr));
783 count++;
784 }
785 endnum = c + 1;
786 lastblock = 1;
787 } else {
788 isBeyondEOF = false;
789 endnum = startnum = ((count > 2) ? 2 : count);
790
791
792
793 if (!c && count != 1) {
794 laarr[2] = laarr[0];
795 laarr[0] = laarr[1];
796 laarr[1] = laarr[2];
797 c = 1;
798 }
799
800
801
802 etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 0);
803 if (etype != -1) {
804 laarr[c + 1].extLength = (etype << 30) | elen;
805 laarr[c + 1].extLocation = eloc;
806 count++;
807 startnum++;
808 endnum++;
809 } else
810 lastblock = 1;
811 }
812
813
814
815 if ((laarr[c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30))
816 newblocknum = laarr[c].extLocation.logicalBlockNum + offset;
817 else {
818 if (iinfo->i_next_alloc_block == block)
819 goal = iinfo->i_next_alloc_goal;
820
821 if (!goal) {
822 if (!(goal = pgoal))
823 goal = iinfo->i_location.logicalBlockNum + 1;
824 }
825
826 newblocknum = udf_new_block(inode->i_sb, inode,
827 iinfo->i_location.partitionReferenceNum,
828 goal, err);
829 if (!newblocknum) {
830 *err = -ENOSPC;
831 newblock = 0;
832 goto out_free;
833 }
834 if (isBeyondEOF)
835 iinfo->i_lenExtents += inode->i_sb->s_blocksize;
836 }
837
838
839
840
841
842 udf_split_extents(inode, &c, offset, newblocknum, laarr, &endnum);
843
844
845
846
847
848 if (S_ISREG(inode->i_mode))
849 udf_prealloc_extents(inode, c, lastblock, laarr, &endnum);
850
851
852 udf_merge_extents(inode, laarr, &endnum);
853
854
855
856
857 udf_update_extents(inode, laarr, startnum, endnum, &prev_epos);
858
859 newblock = udf_get_pblock(inode->i_sb, newblocknum,
860 iinfo->i_location.partitionReferenceNum, 0);
861 if (!newblock) {
862 *err = -EIO;
863 goto out_free;
864 }
865 *new = 1;
866 iinfo->i_next_alloc_block = block;
867 iinfo->i_next_alloc_goal = newblocknum;
868 inode->i_ctime = current_time(inode);
869
870 if (IS_SYNC(inode))
871 udf_sync_inode(inode);
872 else
873 mark_inode_dirty(inode);
874out_free:
875 brelse(prev_epos.bh);
876 brelse(cur_epos.bh);
877 brelse(next_epos.bh);
878 return newblock;
879}
880
881static void udf_split_extents(struct inode *inode, int *c, int offset,
882 udf_pblk_t newblocknum,
883 struct kernel_long_ad *laarr, int *endnum)
884{
885 unsigned long blocksize = inode->i_sb->s_blocksize;
886 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits;
887
888 if ((laarr[*c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30) ||
889 (laarr[*c].extLength >> 30) ==
890 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) {
891 int curr = *c;
892 int blen = ((laarr[curr].extLength & UDF_EXTENT_LENGTH_MASK) +
893 blocksize - 1) >> blocksize_bits;
894 int8_t etype = (laarr[curr].extLength >> 30);
895
896 if (blen == 1)
897 ;
898 else if (!offset || blen == offset + 1) {
899 laarr[curr + 2] = laarr[curr + 1];
900 laarr[curr + 1] = laarr[curr];
901 } else {
902 laarr[curr + 3] = laarr[curr + 1];
903 laarr[curr + 2] = laarr[curr + 1] = laarr[curr];
904 }
905
906 if (offset) {
907 if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30)) {
908 udf_free_blocks(inode->i_sb, inode,
909 &laarr[curr].extLocation,
910 0, offset);
911 laarr[curr].extLength =
912 EXT_NOT_RECORDED_NOT_ALLOCATED |
913 (offset << blocksize_bits);
914 laarr[curr].extLocation.logicalBlockNum = 0;
915 laarr[curr].extLocation.
916 partitionReferenceNum = 0;
917 } else
918 laarr[curr].extLength = (etype << 30) |
919 (offset << blocksize_bits);
920 curr++;
921 (*c)++;
922 (*endnum)++;
923 }
924
925 laarr[curr].extLocation.logicalBlockNum = newblocknum;
926 if (etype == (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))
927 laarr[curr].extLocation.partitionReferenceNum =
928 UDF_I(inode)->i_location.partitionReferenceNum;
929 laarr[curr].extLength = EXT_RECORDED_ALLOCATED |
930 blocksize;
931 curr++;
932
933 if (blen != offset + 1) {
934 if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30))
935 laarr[curr].extLocation.logicalBlockNum +=
936 offset + 1;
937 laarr[curr].extLength = (etype << 30) |
938 ((blen - (offset + 1)) << blocksize_bits);
939 curr++;
940 (*endnum)++;
941 }
942 }
943}
944
945static void udf_prealloc_extents(struct inode *inode, int c, int lastblock,
946 struct kernel_long_ad *laarr,
947 int *endnum)
948{
949 int start, length = 0, currlength = 0, i;
950
951 if (*endnum >= (c + 1)) {
952 if (!lastblock)
953 return;
954 else
955 start = c;
956 } else {
957 if ((laarr[c + 1].extLength >> 30) ==
958 (EXT_NOT_RECORDED_ALLOCATED >> 30)) {
959 start = c + 1;
960 length = currlength =
961 (((laarr[c + 1].extLength &
962 UDF_EXTENT_LENGTH_MASK) +
963 inode->i_sb->s_blocksize - 1) >>
964 inode->i_sb->s_blocksize_bits);
965 } else
966 start = c;
967 }
968
969 for (i = start + 1; i <= *endnum; i++) {
970 if (i == *endnum) {
971 if (lastblock)
972 length += UDF_DEFAULT_PREALLOC_BLOCKS;
973 } else if ((laarr[i].extLength >> 30) ==
974 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) {
975 length += (((laarr[i].extLength &
976 UDF_EXTENT_LENGTH_MASK) +
977 inode->i_sb->s_blocksize - 1) >>
978 inode->i_sb->s_blocksize_bits);
979 } else
980 break;
981 }
982
983 if (length) {
984 int next = laarr[start].extLocation.logicalBlockNum +
985 (((laarr[start].extLength & UDF_EXTENT_LENGTH_MASK) +
986 inode->i_sb->s_blocksize - 1) >>
987 inode->i_sb->s_blocksize_bits);
988 int numalloc = udf_prealloc_blocks(inode->i_sb, inode,
989 laarr[start].extLocation.partitionReferenceNum,
990 next, (UDF_DEFAULT_PREALLOC_BLOCKS > length ?
991 length : UDF_DEFAULT_PREALLOC_BLOCKS) -
992 currlength);
993 if (numalloc) {
994 if (start == (c + 1))
995 laarr[start].extLength +=
996 (numalloc <<
997 inode->i_sb->s_blocksize_bits);
998 else {
999 memmove(&laarr[c + 2], &laarr[c + 1],
1000 sizeof(struct long_ad) * (*endnum - (c + 1)));
1001 (*endnum)++;
1002 laarr[c + 1].extLocation.logicalBlockNum = next;
1003 laarr[c + 1].extLocation.partitionReferenceNum =
1004 laarr[c].extLocation.
1005 partitionReferenceNum;
1006 laarr[c + 1].extLength =
1007 EXT_NOT_RECORDED_ALLOCATED |
1008 (numalloc <<
1009 inode->i_sb->s_blocksize_bits);
1010 start = c + 1;
1011 }
1012
1013 for (i = start + 1; numalloc && i < *endnum; i++) {
1014 int elen = ((laarr[i].extLength &
1015 UDF_EXTENT_LENGTH_MASK) +
1016 inode->i_sb->s_blocksize - 1) >>
1017 inode->i_sb->s_blocksize_bits;
1018
1019 if (elen > numalloc) {
1020 laarr[i].extLength -=
1021 (numalloc <<
1022 inode->i_sb->s_blocksize_bits);
1023 numalloc = 0;
1024 } else {
1025 numalloc -= elen;
1026 if (*endnum > (i + 1))
1027 memmove(&laarr[i],
1028 &laarr[i + 1],
1029 sizeof(struct long_ad) *
1030 (*endnum - (i + 1)));
1031 i--;
1032 (*endnum)--;
1033 }
1034 }
1035 UDF_I(inode)->i_lenExtents +=
1036 numalloc << inode->i_sb->s_blocksize_bits;
1037 }
1038 }
1039}
1040
1041static void udf_merge_extents(struct inode *inode, struct kernel_long_ad *laarr,
1042 int *endnum)
1043{
1044 int i;
1045 unsigned long blocksize = inode->i_sb->s_blocksize;
1046 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits;
1047
1048 for (i = 0; i < (*endnum - 1); i++) {
1049 struct kernel_long_ad *li = &laarr[i];
1050 struct kernel_long_ad *lip1 = &laarr[i + 1];
1051
1052 if (((li->extLength >> 30) == (lip1->extLength >> 30)) &&
1053 (((li->extLength >> 30) ==
1054 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) ||
1055 ((lip1->extLocation.logicalBlockNum -
1056 li->extLocation.logicalBlockNum) ==
1057 (((li->extLength & UDF_EXTENT_LENGTH_MASK) +
1058 blocksize - 1) >> blocksize_bits)))) {
1059
1060 if (((li->extLength & UDF_EXTENT_LENGTH_MASK) +
1061 (lip1->extLength & UDF_EXTENT_LENGTH_MASK) +
1062 blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) {
1063 lip1->extLength = (lip1->extLength -
1064 (li->extLength &
1065 UDF_EXTENT_LENGTH_MASK) +
1066 UDF_EXTENT_LENGTH_MASK) &
1067 ~(blocksize - 1);
1068 li->extLength = (li->extLength &
1069 UDF_EXTENT_FLAG_MASK) +
1070 (UDF_EXTENT_LENGTH_MASK + 1) -
1071 blocksize;
1072 lip1->extLocation.logicalBlockNum =
1073 li->extLocation.logicalBlockNum +
1074 ((li->extLength &
1075 UDF_EXTENT_LENGTH_MASK) >>
1076 blocksize_bits);
1077 } else {
1078 li->extLength = lip1->extLength +
1079 (((li->extLength &
1080 UDF_EXTENT_LENGTH_MASK) +
1081 blocksize - 1) & ~(blocksize - 1));
1082 if (*endnum > (i + 2))
1083 memmove(&laarr[i + 1], &laarr[i + 2],
1084 sizeof(struct long_ad) *
1085 (*endnum - (i + 2)));
1086 i--;
1087 (*endnum)--;
1088 }
1089 } else if (((li->extLength >> 30) ==
1090 (EXT_NOT_RECORDED_ALLOCATED >> 30)) &&
1091 ((lip1->extLength >> 30) ==
1092 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))) {
1093 udf_free_blocks(inode->i_sb, inode, &li->extLocation, 0,
1094 ((li->extLength &
1095 UDF_EXTENT_LENGTH_MASK) +
1096 blocksize - 1) >> blocksize_bits);
1097 li->extLocation.logicalBlockNum = 0;
1098 li->extLocation.partitionReferenceNum = 0;
1099
1100 if (((li->extLength & UDF_EXTENT_LENGTH_MASK) +
1101 (lip1->extLength & UDF_EXTENT_LENGTH_MASK) +
1102 blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) {
1103 lip1->extLength = (lip1->extLength -
1104 (li->extLength &
1105 UDF_EXTENT_LENGTH_MASK) +
1106 UDF_EXTENT_LENGTH_MASK) &
1107 ~(blocksize - 1);
1108 li->extLength = (li->extLength &
1109 UDF_EXTENT_FLAG_MASK) +
1110 (UDF_EXTENT_LENGTH_MASK + 1) -
1111 blocksize;
1112 } else {
1113 li->extLength = lip1->extLength +
1114 (((li->extLength &
1115 UDF_EXTENT_LENGTH_MASK) +
1116 blocksize - 1) & ~(blocksize - 1));
1117 if (*endnum > (i + 2))
1118 memmove(&laarr[i + 1], &laarr[i + 2],
1119 sizeof(struct long_ad) *
1120 (*endnum - (i + 2)));
1121 i--;
1122 (*endnum)--;
1123 }
1124 } else if ((li->extLength >> 30) ==
1125 (EXT_NOT_RECORDED_ALLOCATED >> 30)) {
1126 udf_free_blocks(inode->i_sb, inode,
1127 &li->extLocation, 0,
1128 ((li->extLength &
1129 UDF_EXTENT_LENGTH_MASK) +
1130 blocksize - 1) >> blocksize_bits);
1131 li->extLocation.logicalBlockNum = 0;
1132 li->extLocation.partitionReferenceNum = 0;
1133 li->extLength = (li->extLength &
1134 UDF_EXTENT_LENGTH_MASK) |
1135 EXT_NOT_RECORDED_NOT_ALLOCATED;
1136 }
1137 }
1138}
1139
1140static void udf_update_extents(struct inode *inode, struct kernel_long_ad *laarr,
1141 int startnum, int endnum,
1142 struct extent_position *epos)
1143{
1144 int start = 0, i;
1145 struct kernel_lb_addr tmploc;
1146 uint32_t tmplen;
1147
1148 if (startnum > endnum) {
1149 for (i = 0; i < (startnum - endnum); i++)
1150 udf_delete_aext(inode, *epos);
1151 } else if (startnum < endnum) {
1152 for (i = 0; i < (endnum - startnum); i++) {
1153 udf_insert_aext(inode, *epos, laarr[i].extLocation,
1154 laarr[i].extLength);
1155 udf_next_aext(inode, epos, &laarr[i].extLocation,
1156 &laarr[i].extLength, 1);
1157 start++;
1158 }
1159 }
1160
1161 for (i = start; i < endnum; i++) {
1162 udf_next_aext(inode, epos, &tmploc, &tmplen, 0);
1163 udf_write_aext(inode, epos, &laarr[i].extLocation,
1164 laarr[i].extLength, 1);
1165 }
1166}
1167
1168struct buffer_head *udf_bread(struct inode *inode, udf_pblk_t block,
1169 int create, int *err)
1170{
1171 struct buffer_head *bh = NULL;
1172
1173 bh = udf_getblk(inode, block, create, err);
1174 if (!bh)
1175 return NULL;
1176
1177 if (buffer_uptodate(bh))
1178 return bh;
1179
1180 ll_rw_block(REQ_OP_READ, 0, 1, &bh);
1181
1182 wait_on_buffer(bh);
1183 if (buffer_uptodate(bh))
1184 return bh;
1185
1186 brelse(bh);
1187 *err = -EIO;
1188 return NULL;
1189}
1190
1191int udf_setsize(struct inode *inode, loff_t newsize)
1192{
1193 int err;
1194 struct udf_inode_info *iinfo;
1195 unsigned int bsize = i_blocksize(inode);
1196
1197 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
1198 S_ISLNK(inode->i_mode)))
1199 return -EINVAL;
1200 if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
1201 return -EPERM;
1202
1203 iinfo = UDF_I(inode);
1204 if (newsize > inode->i_size) {
1205 down_write(&iinfo->i_data_sem);
1206 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
1207 if (bsize <
1208 (udf_file_entry_alloc_offset(inode) + newsize)) {
1209 err = udf_expand_file_adinicb(inode);
1210 if (err)
1211 return err;
1212 down_write(&iinfo->i_data_sem);
1213 } else {
1214 iinfo->i_lenAlloc = newsize;
1215 goto set_size;
1216 }
1217 }
1218 err = udf_extend_file(inode, newsize);
1219 if (err) {
1220 up_write(&iinfo->i_data_sem);
1221 return err;
1222 }
1223set_size:
1224 up_write(&iinfo->i_data_sem);
1225 truncate_setsize(inode, newsize);
1226 } else {
1227 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
1228 down_write(&iinfo->i_data_sem);
1229 udf_clear_extent_cache(inode);
1230 memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr + newsize,
1231 0x00, bsize - newsize -
1232 udf_file_entry_alloc_offset(inode));
1233 iinfo->i_lenAlloc = newsize;
1234 truncate_setsize(inode, newsize);
1235 up_write(&iinfo->i_data_sem);
1236 goto update_time;
1237 }
1238 err = block_truncate_page(inode->i_mapping, newsize,
1239 udf_get_block);
1240 if (err)
1241 return err;
1242 truncate_setsize(inode, newsize);
1243 down_write(&iinfo->i_data_sem);
1244 udf_clear_extent_cache(inode);
1245 err = udf_truncate_extents(inode);
1246 up_write(&iinfo->i_data_sem);
1247 if (err)
1248 return err;
1249 }
1250update_time:
1251 inode->i_mtime = inode->i_ctime = current_time(inode);
1252 if (IS_SYNC(inode))
1253 udf_sync_inode(inode);
1254 else
1255 mark_inode_dirty(inode);
1256 return 0;
1257}
1258
1259
1260
1261
1262
1263
1264#define UDF_MAX_ICB_NESTING 1024
1265
1266static int udf_read_inode(struct inode *inode, bool hidden_inode)
1267{
1268 struct buffer_head *bh = NULL;
1269 struct fileEntry *fe;
1270 struct extendedFileEntry *efe;
1271 uint16_t ident;
1272 struct udf_inode_info *iinfo = UDF_I(inode);
1273 struct udf_sb_info *sbi = UDF_SB(inode->i_sb);
1274 struct kernel_lb_addr *iloc = &iinfo->i_location;
1275 unsigned int link_count;
1276 unsigned int indirections = 0;
1277 int bs = inode->i_sb->s_blocksize;
1278 int ret = -EIO;
1279 uint32_t uid, gid;
1280
1281reread:
1282 if (iloc->partitionReferenceNum >= sbi->s_partitions) {
1283 udf_debug("partition reference: %u > logical volume partitions: %u\n",
1284 iloc->partitionReferenceNum, sbi->s_partitions);
1285 return -EIO;
1286 }
1287
1288 if (iloc->logicalBlockNum >=
1289 sbi->s_partmaps[iloc->partitionReferenceNum].s_partition_len) {
1290 udf_debug("block=%u, partition=%u out of range\n",
1291 iloc->logicalBlockNum, iloc->partitionReferenceNum);
1292 return -EIO;
1293 }
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307 bh = udf_read_ptagged(inode->i_sb, iloc, 0, &ident);
1308 if (!bh) {
1309 udf_err(inode->i_sb, "(ino %lu) failed !bh\n", inode->i_ino);
1310 return -EIO;
1311 }
1312
1313 if (ident != TAG_IDENT_FE && ident != TAG_IDENT_EFE &&
1314 ident != TAG_IDENT_USE) {
1315 udf_err(inode->i_sb, "(ino %lu) failed ident=%u\n",
1316 inode->i_ino, ident);
1317 goto out;
1318 }
1319
1320 fe = (struct fileEntry *)bh->b_data;
1321 efe = (struct extendedFileEntry *)bh->b_data;
1322
1323 if (fe->icbTag.strategyType == cpu_to_le16(4096)) {
1324 struct buffer_head *ibh;
1325
1326 ibh = udf_read_ptagged(inode->i_sb, iloc, 1, &ident);
1327 if (ident == TAG_IDENT_IE && ibh) {
1328 struct kernel_lb_addr loc;
1329 struct indirectEntry *ie;
1330
1331 ie = (struct indirectEntry *)ibh->b_data;
1332 loc = lelb_to_cpu(ie->indirectICB.extLocation);
1333
1334 if (ie->indirectICB.extLength) {
1335 brelse(ibh);
1336 memcpy(&iinfo->i_location, &loc,
1337 sizeof(struct kernel_lb_addr));
1338 if (++indirections > UDF_MAX_ICB_NESTING) {
1339 udf_err(inode->i_sb,
1340 "too many ICBs in ICB hierarchy"
1341 " (max %d supported)\n",
1342 UDF_MAX_ICB_NESTING);
1343 goto out;
1344 }
1345 brelse(bh);
1346 goto reread;
1347 }
1348 }
1349 brelse(ibh);
1350 } else if (fe->icbTag.strategyType != cpu_to_le16(4)) {
1351 udf_err(inode->i_sb, "unsupported strategy type: %u\n",
1352 le16_to_cpu(fe->icbTag.strategyType));
1353 goto out;
1354 }
1355 if (fe->icbTag.strategyType == cpu_to_le16(4))
1356 iinfo->i_strat4096 = 0;
1357 else
1358 iinfo->i_strat4096 = 1;
1359
1360 iinfo->i_alloc_type = le16_to_cpu(fe->icbTag.flags) &
1361 ICBTAG_FLAG_AD_MASK;
1362 if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_SHORT &&
1363 iinfo->i_alloc_type != ICBTAG_FLAG_AD_LONG &&
1364 iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
1365 ret = -EIO;
1366 goto out;
1367 }
1368 iinfo->i_unique = 0;
1369 iinfo->i_lenEAttr = 0;
1370 iinfo->i_lenExtents = 0;
1371 iinfo->i_lenAlloc = 0;
1372 iinfo->i_next_alloc_block = 0;
1373 iinfo->i_next_alloc_goal = 0;
1374 if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_EFE)) {
1375 iinfo->i_efe = 1;
1376 iinfo->i_use = 0;
1377 ret = udf_alloc_i_data(inode, bs -
1378 sizeof(struct extendedFileEntry));
1379 if (ret)
1380 goto out;
1381 memcpy(iinfo->i_ext.i_data,
1382 bh->b_data + sizeof(struct extendedFileEntry),
1383 bs - sizeof(struct extendedFileEntry));
1384 } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_FE)) {
1385 iinfo->i_efe = 0;
1386 iinfo->i_use = 0;
1387 ret = udf_alloc_i_data(inode, bs - sizeof(struct fileEntry));
1388 if (ret)
1389 goto out;
1390 memcpy(iinfo->i_ext.i_data,
1391 bh->b_data + sizeof(struct fileEntry),
1392 bs - sizeof(struct fileEntry));
1393 } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_USE)) {
1394 iinfo->i_efe = 0;
1395 iinfo->i_use = 1;
1396 iinfo->i_lenAlloc = le32_to_cpu(
1397 ((struct unallocSpaceEntry *)bh->b_data)->
1398 lengthAllocDescs);
1399 ret = udf_alloc_i_data(inode, bs -
1400 sizeof(struct unallocSpaceEntry));
1401 if (ret)
1402 goto out;
1403 memcpy(iinfo->i_ext.i_data,
1404 bh->b_data + sizeof(struct unallocSpaceEntry),
1405 bs - sizeof(struct unallocSpaceEntry));
1406 return 0;
1407 }
1408
1409 ret = -EIO;
1410 read_lock(&sbi->s_cred_lock);
1411 uid = le32_to_cpu(fe->uid);
1412 if (uid == UDF_INVALID_ID ||
1413 UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_SET))
1414 inode->i_uid = sbi->s_uid;
1415 else
1416 i_uid_write(inode, uid);
1417
1418 gid = le32_to_cpu(fe->gid);
1419 if (gid == UDF_INVALID_ID ||
1420 UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_SET))
1421 inode->i_gid = sbi->s_gid;
1422 else
1423 i_gid_write(inode, gid);
1424
1425 if (fe->icbTag.fileType != ICBTAG_FILE_TYPE_DIRECTORY &&
1426 sbi->s_fmode != UDF_INVALID_MODE)
1427 inode->i_mode = sbi->s_fmode;
1428 else if (fe->icbTag.fileType == ICBTAG_FILE_TYPE_DIRECTORY &&
1429 sbi->s_dmode != UDF_INVALID_MODE)
1430 inode->i_mode = sbi->s_dmode;
1431 else
1432 inode->i_mode = udf_convert_permissions(fe);
1433 inode->i_mode &= ~sbi->s_umask;
1434 read_unlock(&sbi->s_cred_lock);
1435
1436 link_count = le16_to_cpu(fe->fileLinkCount);
1437 if (!link_count) {
1438 if (!hidden_inode) {
1439 ret = -ESTALE;
1440 goto out;
1441 }
1442 link_count = 1;
1443 }
1444 set_nlink(inode, link_count);
1445
1446 inode->i_size = le64_to_cpu(fe->informationLength);
1447 iinfo->i_lenExtents = inode->i_size;
1448
1449 if (iinfo->i_efe == 0) {
1450 inode->i_blocks = le64_to_cpu(fe->logicalBlocksRecorded) <<
1451 (inode->i_sb->s_blocksize_bits - 9);
1452
1453 udf_disk_stamp_to_time(&inode->i_atime, fe->accessTime);
1454 udf_disk_stamp_to_time(&inode->i_mtime, fe->modificationTime);
1455 udf_disk_stamp_to_time(&inode->i_ctime, fe->attrTime);
1456
1457 iinfo->i_unique = le64_to_cpu(fe->uniqueID);
1458 iinfo->i_lenEAttr = le32_to_cpu(fe->lengthExtendedAttr);
1459 iinfo->i_lenAlloc = le32_to_cpu(fe->lengthAllocDescs);
1460 iinfo->i_checkpoint = le32_to_cpu(fe->checkpoint);
1461 } else {
1462 inode->i_blocks = le64_to_cpu(efe->logicalBlocksRecorded) <<
1463 (inode->i_sb->s_blocksize_bits - 9);
1464
1465 udf_disk_stamp_to_time(&inode->i_atime, efe->accessTime);
1466 udf_disk_stamp_to_time(&inode->i_mtime, efe->modificationTime);
1467 udf_disk_stamp_to_time(&iinfo->i_crtime, efe->createTime);
1468 udf_disk_stamp_to_time(&inode->i_ctime, efe->attrTime);
1469
1470 iinfo->i_unique = le64_to_cpu(efe->uniqueID);
1471 iinfo->i_lenEAttr = le32_to_cpu(efe->lengthExtendedAttr);
1472 iinfo->i_lenAlloc = le32_to_cpu(efe->lengthAllocDescs);
1473 iinfo->i_checkpoint = le32_to_cpu(efe->checkpoint);
1474 }
1475 inode->i_generation = iinfo->i_unique;
1476
1477
1478
1479
1480
1481 if (iinfo->i_lenEAttr > bs || iinfo->i_lenAlloc > bs)
1482 goto out;
1483
1484 if (udf_file_entry_alloc_offset(inode) + iinfo->i_lenAlloc > bs)
1485 goto out;
1486
1487 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
1488
1489
1490
1491
1492 if (iinfo->i_lenAlloc != inode->i_size)
1493 goto out;
1494
1495 if (inode->i_size > bs - udf_file_entry_alloc_offset(inode))
1496 goto out;
1497 }
1498
1499 switch (fe->icbTag.fileType) {
1500 case ICBTAG_FILE_TYPE_DIRECTORY:
1501 inode->i_op = &udf_dir_inode_operations;
1502 inode->i_fop = &udf_dir_operations;
1503 inode->i_mode |= S_IFDIR;
1504 inc_nlink(inode);
1505 break;
1506 case ICBTAG_FILE_TYPE_REALTIME:
1507 case ICBTAG_FILE_TYPE_REGULAR:
1508 case ICBTAG_FILE_TYPE_UNDEF:
1509 case ICBTAG_FILE_TYPE_VAT20:
1510 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
1511 inode->i_data.a_ops = &udf_adinicb_aops;
1512 else
1513 inode->i_data.a_ops = &udf_aops;
1514 inode->i_op = &udf_file_inode_operations;
1515 inode->i_fop = &udf_file_operations;
1516 inode->i_mode |= S_IFREG;
1517 break;
1518 case ICBTAG_FILE_TYPE_BLOCK:
1519 inode->i_mode |= S_IFBLK;
1520 break;
1521 case ICBTAG_FILE_TYPE_CHAR:
1522 inode->i_mode |= S_IFCHR;
1523 break;
1524 case ICBTAG_FILE_TYPE_FIFO:
1525 init_special_inode(inode, inode->i_mode | S_IFIFO, 0);
1526 break;
1527 case ICBTAG_FILE_TYPE_SOCKET:
1528 init_special_inode(inode, inode->i_mode | S_IFSOCK, 0);
1529 break;
1530 case ICBTAG_FILE_TYPE_SYMLINK:
1531 inode->i_data.a_ops = &udf_symlink_aops;
1532 inode->i_op = &udf_symlink_inode_operations;
1533 inode_nohighmem(inode);
1534 inode->i_mode = S_IFLNK | 0777;
1535 break;
1536 case ICBTAG_FILE_TYPE_MAIN:
1537 udf_debug("METADATA FILE-----\n");
1538 break;
1539 case ICBTAG_FILE_TYPE_MIRROR:
1540 udf_debug("METADATA MIRROR FILE-----\n");
1541 break;
1542 case ICBTAG_FILE_TYPE_BITMAP:
1543 udf_debug("METADATA BITMAP FILE-----\n");
1544 break;
1545 default:
1546 udf_err(inode->i_sb, "(ino %lu) failed unknown file type=%u\n",
1547 inode->i_ino, fe->icbTag.fileType);
1548 goto out;
1549 }
1550 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
1551 struct deviceSpec *dsea =
1552 (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1);
1553 if (dsea) {
1554 init_special_inode(inode, inode->i_mode,
1555 MKDEV(le32_to_cpu(dsea->majorDeviceIdent),
1556 le32_to_cpu(dsea->minorDeviceIdent)));
1557
1558 } else
1559 goto out;
1560 }
1561 ret = 0;
1562out:
1563 brelse(bh);
1564 return ret;
1565}
1566
1567static int udf_alloc_i_data(struct inode *inode, size_t size)
1568{
1569 struct udf_inode_info *iinfo = UDF_I(inode);
1570 iinfo->i_ext.i_data = kmalloc(size, GFP_KERNEL);
1571 if (!iinfo->i_ext.i_data)
1572 return -ENOMEM;
1573 return 0;
1574}
1575
1576static umode_t udf_convert_permissions(struct fileEntry *fe)
1577{
1578 umode_t mode;
1579 uint32_t permissions;
1580 uint32_t flags;
1581
1582 permissions = le32_to_cpu(fe->permissions);
1583 flags = le16_to_cpu(fe->icbTag.flags);
1584
1585 mode = ((permissions) & 0007) |
1586 ((permissions >> 2) & 0070) |
1587 ((permissions >> 4) & 0700) |
1588 ((flags & ICBTAG_FLAG_SETUID) ? S_ISUID : 0) |
1589 ((flags & ICBTAG_FLAG_SETGID) ? S_ISGID : 0) |
1590 ((flags & ICBTAG_FLAG_STICKY) ? S_ISVTX : 0);
1591
1592 return mode;
1593}
1594
1595int udf_write_inode(struct inode *inode, struct writeback_control *wbc)
1596{
1597 return udf_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL);
1598}
1599
1600static int udf_sync_inode(struct inode *inode)
1601{
1602 return udf_update_inode(inode, 1);
1603}
1604
1605static void udf_adjust_time(struct udf_inode_info *iinfo, struct timespec64 time)
1606{
1607 if (iinfo->i_crtime.tv_sec > time.tv_sec ||
1608 (iinfo->i_crtime.tv_sec == time.tv_sec &&
1609 iinfo->i_crtime.tv_nsec > time.tv_nsec))
1610 iinfo->i_crtime = time;
1611}
1612
1613static int udf_update_inode(struct inode *inode, int do_sync)
1614{
1615 struct buffer_head *bh = NULL;
1616 struct fileEntry *fe;
1617 struct extendedFileEntry *efe;
1618 uint64_t lb_recorded;
1619 uint32_t udfperms;
1620 uint16_t icbflags;
1621 uint16_t crclen;
1622 int err = 0;
1623 struct udf_sb_info *sbi = UDF_SB(inode->i_sb);
1624 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits;
1625 struct udf_inode_info *iinfo = UDF_I(inode);
1626
1627 bh = udf_tgetblk(inode->i_sb,
1628 udf_get_lb_pblock(inode->i_sb, &iinfo->i_location, 0));
1629 if (!bh) {
1630 udf_debug("getblk failure\n");
1631 return -EIO;
1632 }
1633
1634 lock_buffer(bh);
1635 memset(bh->b_data, 0, inode->i_sb->s_blocksize);
1636 fe = (struct fileEntry *)bh->b_data;
1637 efe = (struct extendedFileEntry *)bh->b_data;
1638
1639 if (iinfo->i_use) {
1640 struct unallocSpaceEntry *use =
1641 (struct unallocSpaceEntry *)bh->b_data;
1642
1643 use->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc);
1644 memcpy(bh->b_data + sizeof(struct unallocSpaceEntry),
1645 iinfo->i_ext.i_data, inode->i_sb->s_blocksize -
1646 sizeof(struct unallocSpaceEntry));
1647 use->descTag.tagIdent = cpu_to_le16(TAG_IDENT_USE);
1648 crclen = sizeof(struct unallocSpaceEntry);
1649
1650 goto finish;
1651 }
1652
1653 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_FORGET))
1654 fe->uid = cpu_to_le32(UDF_INVALID_ID);
1655 else
1656 fe->uid = cpu_to_le32(i_uid_read(inode));
1657
1658 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_FORGET))
1659 fe->gid = cpu_to_le32(UDF_INVALID_ID);
1660 else
1661 fe->gid = cpu_to_le32(i_gid_read(inode));
1662
1663 udfperms = ((inode->i_mode & 0007)) |
1664 ((inode->i_mode & 0070) << 2) |
1665 ((inode->i_mode & 0700) << 4);
1666
1667 udfperms |= (le32_to_cpu(fe->permissions) &
1668 (FE_PERM_O_DELETE | FE_PERM_O_CHATTR |
1669 FE_PERM_G_DELETE | FE_PERM_G_CHATTR |
1670 FE_PERM_U_DELETE | FE_PERM_U_CHATTR));
1671 fe->permissions = cpu_to_le32(udfperms);
1672
1673 if (S_ISDIR(inode->i_mode) && inode->i_nlink > 0)
1674 fe->fileLinkCount = cpu_to_le16(inode->i_nlink - 1);
1675 else
1676 fe->fileLinkCount = cpu_to_le16(inode->i_nlink);
1677
1678 fe->informationLength = cpu_to_le64(inode->i_size);
1679
1680 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
1681 struct regid *eid;
1682 struct deviceSpec *dsea =
1683 (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1);
1684 if (!dsea) {
1685 dsea = (struct deviceSpec *)
1686 udf_add_extendedattr(inode,
1687 sizeof(struct deviceSpec) +
1688 sizeof(struct regid), 12, 0x3);
1689 dsea->attrType = cpu_to_le32(12);
1690 dsea->attrSubtype = 1;
1691 dsea->attrLength = cpu_to_le32(
1692 sizeof(struct deviceSpec) +
1693 sizeof(struct regid));
1694 dsea->impUseLength = cpu_to_le32(sizeof(struct regid));
1695 }
1696 eid = (struct regid *)dsea->impUse;
1697 memset(eid, 0, sizeof(*eid));
1698 strcpy(eid->ident, UDF_ID_DEVELOPER);
1699 eid->identSuffix[0] = UDF_OS_CLASS_UNIX;
1700 eid->identSuffix[1] = UDF_OS_ID_LINUX;
1701 dsea->majorDeviceIdent = cpu_to_le32(imajor(inode));
1702 dsea->minorDeviceIdent = cpu_to_le32(iminor(inode));
1703 }
1704
1705 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
1706 lb_recorded = 0;
1707 else
1708 lb_recorded =
1709 (inode->i_blocks + (1 << (blocksize_bits - 9)) - 1) >>
1710 (blocksize_bits - 9);
1711
1712 if (iinfo->i_efe == 0) {
1713 memcpy(bh->b_data + sizeof(struct fileEntry),
1714 iinfo->i_ext.i_data,
1715 inode->i_sb->s_blocksize - sizeof(struct fileEntry));
1716 fe->logicalBlocksRecorded = cpu_to_le64(lb_recorded);
1717
1718 udf_time_to_disk_stamp(&fe->accessTime, inode->i_atime);
1719 udf_time_to_disk_stamp(&fe->modificationTime, inode->i_mtime);
1720 udf_time_to_disk_stamp(&fe->attrTime, inode->i_ctime);
1721 memset(&(fe->impIdent), 0, sizeof(struct regid));
1722 strcpy(fe->impIdent.ident, UDF_ID_DEVELOPER);
1723 fe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1724 fe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1725 fe->uniqueID = cpu_to_le64(iinfo->i_unique);
1726 fe->lengthExtendedAttr = cpu_to_le32(iinfo->i_lenEAttr);
1727 fe->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc);
1728 fe->checkpoint = cpu_to_le32(iinfo->i_checkpoint);
1729 fe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_FE);
1730 crclen = sizeof(struct fileEntry);
1731 } else {
1732 memcpy(bh->b_data + sizeof(struct extendedFileEntry),
1733 iinfo->i_ext.i_data,
1734 inode->i_sb->s_blocksize -
1735 sizeof(struct extendedFileEntry));
1736 efe->objectSize = cpu_to_le64(inode->i_size);
1737 efe->logicalBlocksRecorded = cpu_to_le64(lb_recorded);
1738
1739 udf_adjust_time(iinfo, inode->i_atime);
1740 udf_adjust_time(iinfo, inode->i_mtime);
1741 udf_adjust_time(iinfo, inode->i_ctime);
1742
1743 udf_time_to_disk_stamp(&efe->accessTime, inode->i_atime);
1744 udf_time_to_disk_stamp(&efe->modificationTime, inode->i_mtime);
1745 udf_time_to_disk_stamp(&efe->createTime, iinfo->i_crtime);
1746 udf_time_to_disk_stamp(&efe->attrTime, inode->i_ctime);
1747
1748 memset(&(efe->impIdent), 0, sizeof(efe->impIdent));
1749 strcpy(efe->impIdent.ident, UDF_ID_DEVELOPER);
1750 efe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1751 efe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1752 efe->uniqueID = cpu_to_le64(iinfo->i_unique);
1753 efe->lengthExtendedAttr = cpu_to_le32(iinfo->i_lenEAttr);
1754 efe->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc);
1755 efe->checkpoint = cpu_to_le32(iinfo->i_checkpoint);
1756 efe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_EFE);
1757 crclen = sizeof(struct extendedFileEntry);
1758 }
1759
1760finish:
1761 if (iinfo->i_strat4096) {
1762 fe->icbTag.strategyType = cpu_to_le16(4096);
1763 fe->icbTag.strategyParameter = cpu_to_le16(1);
1764 fe->icbTag.numEntries = cpu_to_le16(2);
1765 } else {
1766 fe->icbTag.strategyType = cpu_to_le16(4);
1767 fe->icbTag.numEntries = cpu_to_le16(1);
1768 }
1769
1770 if (iinfo->i_use)
1771 fe->icbTag.fileType = ICBTAG_FILE_TYPE_USE;
1772 else if (S_ISDIR(inode->i_mode))
1773 fe->icbTag.fileType = ICBTAG_FILE_TYPE_DIRECTORY;
1774 else if (S_ISREG(inode->i_mode))
1775 fe->icbTag.fileType = ICBTAG_FILE_TYPE_REGULAR;
1776 else if (S_ISLNK(inode->i_mode))
1777 fe->icbTag.fileType = ICBTAG_FILE_TYPE_SYMLINK;
1778 else if (S_ISBLK(inode->i_mode))
1779 fe->icbTag.fileType = ICBTAG_FILE_TYPE_BLOCK;
1780 else if (S_ISCHR(inode->i_mode))
1781 fe->icbTag.fileType = ICBTAG_FILE_TYPE_CHAR;
1782 else if (S_ISFIFO(inode->i_mode))
1783 fe->icbTag.fileType = ICBTAG_FILE_TYPE_FIFO;
1784 else if (S_ISSOCK(inode->i_mode))
1785 fe->icbTag.fileType = ICBTAG_FILE_TYPE_SOCKET;
1786
1787 icbflags = iinfo->i_alloc_type |
1788 ((inode->i_mode & S_ISUID) ? ICBTAG_FLAG_SETUID : 0) |
1789 ((inode->i_mode & S_ISGID) ? ICBTAG_FLAG_SETGID : 0) |
1790 ((inode->i_mode & S_ISVTX) ? ICBTAG_FLAG_STICKY : 0) |
1791 (le16_to_cpu(fe->icbTag.flags) &
1792 ~(ICBTAG_FLAG_AD_MASK | ICBTAG_FLAG_SETUID |
1793 ICBTAG_FLAG_SETGID | ICBTAG_FLAG_STICKY));
1794
1795 fe->icbTag.flags = cpu_to_le16(icbflags);
1796 if (sbi->s_udfrev >= 0x0200)
1797 fe->descTag.descVersion = cpu_to_le16(3);
1798 else
1799 fe->descTag.descVersion = cpu_to_le16(2);
1800 fe->descTag.tagSerialNum = cpu_to_le16(sbi->s_serial_number);
1801 fe->descTag.tagLocation = cpu_to_le32(
1802 iinfo->i_location.logicalBlockNum);
1803 crclen += iinfo->i_lenEAttr + iinfo->i_lenAlloc - sizeof(struct tag);
1804 fe->descTag.descCRCLength = cpu_to_le16(crclen);
1805 fe->descTag.descCRC = cpu_to_le16(crc_itu_t(0, (char *)fe + sizeof(struct tag),
1806 crclen));
1807 fe->descTag.tagChecksum = udf_tag_checksum(&fe->descTag);
1808
1809 set_buffer_uptodate(bh);
1810 unlock_buffer(bh);
1811
1812
1813 mark_buffer_dirty(bh);
1814 if (do_sync) {
1815 sync_dirty_buffer(bh);
1816 if (buffer_write_io_error(bh)) {
1817 udf_warn(inode->i_sb, "IO error syncing udf inode [%08lx]\n",
1818 inode->i_ino);
1819 err = -EIO;
1820 }
1821 }
1822 brelse(bh);
1823
1824 return err;
1825}
1826
1827struct inode *__udf_iget(struct super_block *sb, struct kernel_lb_addr *ino,
1828 bool hidden_inode)
1829{
1830 unsigned long block = udf_get_lb_pblock(sb, ino, 0);
1831 struct inode *inode = iget_locked(sb, block);
1832 int err;
1833
1834 if (!inode)
1835 return ERR_PTR(-ENOMEM);
1836
1837 if (!(inode->i_state & I_NEW))
1838 return inode;
1839
1840 memcpy(&UDF_I(inode)->i_location, ino, sizeof(struct kernel_lb_addr));
1841 err = udf_read_inode(inode, hidden_inode);
1842 if (err < 0) {
1843 iget_failed(inode);
1844 return ERR_PTR(err);
1845 }
1846 unlock_new_inode(inode);
1847
1848 return inode;
1849}
1850
1851int udf_setup_indirect_aext(struct inode *inode, udf_pblk_t block,
1852 struct extent_position *epos)
1853{
1854 struct super_block *sb = inode->i_sb;
1855 struct buffer_head *bh;
1856 struct allocExtDesc *aed;
1857 struct extent_position nepos;
1858 struct kernel_lb_addr neloc;
1859 int ver, adsize;
1860
1861 if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
1862 adsize = sizeof(struct short_ad);
1863 else if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_LONG)
1864 adsize = sizeof(struct long_ad);
1865 else
1866 return -EIO;
1867
1868 neloc.logicalBlockNum = block;
1869 neloc.partitionReferenceNum = epos->block.partitionReferenceNum;
1870
1871 bh = udf_tgetblk(sb, udf_get_lb_pblock(sb, &neloc, 0));
1872 if (!bh)
1873 return -EIO;
1874 lock_buffer(bh);
1875 memset(bh->b_data, 0x00, sb->s_blocksize);
1876 set_buffer_uptodate(bh);
1877 unlock_buffer(bh);
1878 mark_buffer_dirty_inode(bh, inode);
1879
1880 aed = (struct allocExtDesc *)(bh->b_data);
1881 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_STRICT)) {
1882 aed->previousAllocExtLocation =
1883 cpu_to_le32(epos->block.logicalBlockNum);
1884 }
1885 aed->lengthAllocDescs = cpu_to_le32(0);
1886 if (UDF_SB(sb)->s_udfrev >= 0x0200)
1887 ver = 3;
1888 else
1889 ver = 2;
1890 udf_new_tag(bh->b_data, TAG_IDENT_AED, ver, 1, block,
1891 sizeof(struct tag));
1892
1893 nepos.block = neloc;
1894 nepos.offset = sizeof(struct allocExtDesc);
1895 nepos.bh = bh;
1896
1897
1898
1899
1900
1901 if (epos->offset + adsize > sb->s_blocksize) {
1902 struct kernel_lb_addr cp_loc;
1903 uint32_t cp_len;
1904 int cp_type;
1905
1906 epos->offset -= adsize;
1907 cp_type = udf_current_aext(inode, epos, &cp_loc, &cp_len, 0);
1908 cp_len |= ((uint32_t)cp_type) << 30;
1909
1910 __udf_add_aext(inode, &nepos, &cp_loc, cp_len, 1);
1911 udf_write_aext(inode, epos, &nepos.block,
1912 sb->s_blocksize | EXT_NEXT_EXTENT_ALLOCDECS, 0);
1913 } else {
1914 __udf_add_aext(inode, epos, &nepos.block,
1915 sb->s_blocksize | EXT_NEXT_EXTENT_ALLOCDECS, 0);
1916 }
1917
1918 brelse(epos->bh);
1919 *epos = nepos;
1920
1921 return 0;
1922}
1923
1924
1925
1926
1927
1928
1929int __udf_add_aext(struct inode *inode, struct extent_position *epos,
1930 struct kernel_lb_addr *eloc, uint32_t elen, int inc)
1931{
1932 struct udf_inode_info *iinfo = UDF_I(inode);
1933 struct allocExtDesc *aed;
1934 int adsize;
1935
1936 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
1937 adsize = sizeof(struct short_ad);
1938 else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
1939 adsize = sizeof(struct long_ad);
1940 else
1941 return -EIO;
1942
1943 if (!epos->bh) {
1944 WARN_ON(iinfo->i_lenAlloc !=
1945 epos->offset - udf_file_entry_alloc_offset(inode));
1946 } else {
1947 aed = (struct allocExtDesc *)epos->bh->b_data;
1948 WARN_ON(le32_to_cpu(aed->lengthAllocDescs) !=
1949 epos->offset - sizeof(struct allocExtDesc));
1950 WARN_ON(epos->offset + adsize > inode->i_sb->s_blocksize);
1951 }
1952
1953 udf_write_aext(inode, epos, eloc, elen, inc);
1954
1955 if (!epos->bh) {
1956 iinfo->i_lenAlloc += adsize;
1957 mark_inode_dirty(inode);
1958 } else {
1959 aed = (struct allocExtDesc *)epos->bh->b_data;
1960 le32_add_cpu(&aed->lengthAllocDescs, adsize);
1961 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
1962 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201)
1963 udf_update_tag(epos->bh->b_data,
1964 epos->offset + (inc ? 0 : adsize));
1965 else
1966 udf_update_tag(epos->bh->b_data,
1967 sizeof(struct allocExtDesc));
1968 mark_buffer_dirty_inode(epos->bh, inode);
1969 }
1970
1971 return 0;
1972}
1973
1974
1975
1976
1977
1978int udf_add_aext(struct inode *inode, struct extent_position *epos,
1979 struct kernel_lb_addr *eloc, uint32_t elen, int inc)
1980{
1981 int adsize;
1982 struct super_block *sb = inode->i_sb;
1983
1984 if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
1985 adsize = sizeof(struct short_ad);
1986 else if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_LONG)
1987 adsize = sizeof(struct long_ad);
1988 else
1989 return -EIO;
1990
1991 if (epos->offset + (2 * adsize) > sb->s_blocksize) {
1992 int err;
1993 udf_pblk_t new_block;
1994
1995 new_block = udf_new_block(sb, NULL,
1996 epos->block.partitionReferenceNum,
1997 epos->block.logicalBlockNum, &err);
1998 if (!new_block)
1999 return -ENOSPC;
2000
2001 err = udf_setup_indirect_aext(inode, new_block, epos);
2002 if (err)
2003 return err;
2004 }
2005
2006 return __udf_add_aext(inode, epos, eloc, elen, inc);
2007}
2008
2009void udf_write_aext(struct inode *inode, struct extent_position *epos,
2010 struct kernel_lb_addr *eloc, uint32_t elen, int inc)
2011{
2012 int adsize;
2013 uint8_t *ptr;
2014 struct short_ad *sad;
2015 struct long_ad *lad;
2016 struct udf_inode_info *iinfo = UDF_I(inode);
2017
2018 if (!epos->bh)
2019 ptr = iinfo->i_ext.i_data + epos->offset -
2020 udf_file_entry_alloc_offset(inode) +
2021 iinfo->i_lenEAttr;
2022 else
2023 ptr = epos->bh->b_data + epos->offset;
2024
2025 switch (iinfo->i_alloc_type) {
2026 case ICBTAG_FLAG_AD_SHORT:
2027 sad = (struct short_ad *)ptr;
2028 sad->extLength = cpu_to_le32(elen);
2029 sad->extPosition = cpu_to_le32(eloc->logicalBlockNum);
2030 adsize = sizeof(struct short_ad);
2031 break;
2032 case ICBTAG_FLAG_AD_LONG:
2033 lad = (struct long_ad *)ptr;
2034 lad->extLength = cpu_to_le32(elen);
2035 lad->extLocation = cpu_to_lelb(*eloc);
2036 memset(lad->impUse, 0x00, sizeof(lad->impUse));
2037 adsize = sizeof(struct long_ad);
2038 break;
2039 default:
2040 return;
2041 }
2042
2043 if (epos->bh) {
2044 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
2045 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) {
2046 struct allocExtDesc *aed =
2047 (struct allocExtDesc *)epos->bh->b_data;
2048 udf_update_tag(epos->bh->b_data,
2049 le32_to_cpu(aed->lengthAllocDescs) +
2050 sizeof(struct allocExtDesc));
2051 }
2052 mark_buffer_dirty_inode(epos->bh, inode);
2053 } else {
2054 mark_inode_dirty(inode);
2055 }
2056
2057 if (inc)
2058 epos->offset += adsize;
2059}
2060
2061
2062
2063
2064
2065#define UDF_MAX_INDIR_EXTS 16
2066
2067int8_t udf_next_aext(struct inode *inode, struct extent_position *epos,
2068 struct kernel_lb_addr *eloc, uint32_t *elen, int inc)
2069{
2070 int8_t etype;
2071 unsigned int indirections = 0;
2072
2073 while ((etype = udf_current_aext(inode, epos, eloc, elen, inc)) ==
2074 (EXT_NEXT_EXTENT_ALLOCDECS >> 30)) {
2075 udf_pblk_t block;
2076
2077 if (++indirections > UDF_MAX_INDIR_EXTS) {
2078 udf_err(inode->i_sb,
2079 "too many indirect extents in inode %lu\n",
2080 inode->i_ino);
2081 return -1;
2082 }
2083
2084 epos->block = *eloc;
2085 epos->offset = sizeof(struct allocExtDesc);
2086 brelse(epos->bh);
2087 block = udf_get_lb_pblock(inode->i_sb, &epos->block, 0);
2088 epos->bh = udf_tread(inode->i_sb, block);
2089 if (!epos->bh) {
2090 udf_debug("reading block %u failed!\n", block);
2091 return -1;
2092 }
2093 }
2094
2095 return etype;
2096}
2097
2098int8_t udf_current_aext(struct inode *inode, struct extent_position *epos,
2099 struct kernel_lb_addr *eloc, uint32_t *elen, int inc)
2100{
2101 int alen;
2102 int8_t etype;
2103 uint8_t *ptr;
2104 struct short_ad *sad;
2105 struct long_ad *lad;
2106 struct udf_inode_info *iinfo = UDF_I(inode);
2107
2108 if (!epos->bh) {
2109 if (!epos->offset)
2110 epos->offset = udf_file_entry_alloc_offset(inode);
2111 ptr = iinfo->i_ext.i_data + epos->offset -
2112 udf_file_entry_alloc_offset(inode) +
2113 iinfo->i_lenEAttr;
2114 alen = udf_file_entry_alloc_offset(inode) +
2115 iinfo->i_lenAlloc;
2116 } else {
2117 if (!epos->offset)
2118 epos->offset = sizeof(struct allocExtDesc);
2119 ptr = epos->bh->b_data + epos->offset;
2120 alen = sizeof(struct allocExtDesc) +
2121 le32_to_cpu(((struct allocExtDesc *)epos->bh->b_data)->
2122 lengthAllocDescs);
2123 }
2124
2125 switch (iinfo->i_alloc_type) {
2126 case ICBTAG_FLAG_AD_SHORT:
2127 sad = udf_get_fileshortad(ptr, alen, &epos->offset, inc);
2128 if (!sad)
2129 return -1;
2130 etype = le32_to_cpu(sad->extLength) >> 30;
2131 eloc->logicalBlockNum = le32_to_cpu(sad->extPosition);
2132 eloc->partitionReferenceNum =
2133 iinfo->i_location.partitionReferenceNum;
2134 *elen = le32_to_cpu(sad->extLength) & UDF_EXTENT_LENGTH_MASK;
2135 break;
2136 case ICBTAG_FLAG_AD_LONG:
2137 lad = udf_get_filelongad(ptr, alen, &epos->offset, inc);
2138 if (!lad)
2139 return -1;
2140 etype = le32_to_cpu(lad->extLength) >> 30;
2141 *eloc = lelb_to_cpu(lad->extLocation);
2142 *elen = le32_to_cpu(lad->extLength) & UDF_EXTENT_LENGTH_MASK;
2143 break;
2144 default:
2145 udf_debug("alloc_type = %u unsupported\n", iinfo->i_alloc_type);
2146 return -1;
2147 }
2148
2149 return etype;
2150}
2151
2152static int8_t udf_insert_aext(struct inode *inode, struct extent_position epos,
2153 struct kernel_lb_addr neloc, uint32_t nelen)
2154{
2155 struct kernel_lb_addr oeloc;
2156 uint32_t oelen;
2157 int8_t etype;
2158
2159 if (epos.bh)
2160 get_bh(epos.bh);
2161
2162 while ((etype = udf_next_aext(inode, &epos, &oeloc, &oelen, 0)) != -1) {
2163 udf_write_aext(inode, &epos, &neloc, nelen, 1);
2164 neloc = oeloc;
2165 nelen = (etype << 30) | oelen;
2166 }
2167 udf_add_aext(inode, &epos, &neloc, nelen, 1);
2168 brelse(epos.bh);
2169
2170 return (nelen >> 30);
2171}
2172
2173int8_t udf_delete_aext(struct inode *inode, struct extent_position epos)
2174{
2175 struct extent_position oepos;
2176 int adsize;
2177 int8_t etype;
2178 struct allocExtDesc *aed;
2179 struct udf_inode_info *iinfo;
2180 struct kernel_lb_addr eloc;
2181 uint32_t elen;
2182
2183 if (epos.bh) {
2184 get_bh(epos.bh);
2185 get_bh(epos.bh);
2186 }
2187
2188 iinfo = UDF_I(inode);
2189 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
2190 adsize = sizeof(struct short_ad);
2191 else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
2192 adsize = sizeof(struct long_ad);
2193 else
2194 adsize = 0;
2195
2196 oepos = epos;
2197 if (udf_next_aext(inode, &epos, &eloc, &elen, 1) == -1)
2198 return -1;
2199
2200 while ((etype = udf_next_aext(inode, &epos, &eloc, &elen, 1)) != -1) {
2201 udf_write_aext(inode, &oepos, &eloc, (etype << 30) | elen, 1);
2202 if (oepos.bh != epos.bh) {
2203 oepos.block = epos.block;
2204 brelse(oepos.bh);
2205 get_bh(epos.bh);
2206 oepos.bh = epos.bh;
2207 oepos.offset = epos.offset - adsize;
2208 }
2209 }
2210 memset(&eloc, 0x00, sizeof(struct kernel_lb_addr));
2211 elen = 0;
2212
2213 if (epos.bh != oepos.bh) {
2214 udf_free_blocks(inode->i_sb, inode, &epos.block, 0, 1);
2215 udf_write_aext(inode, &oepos, &eloc, elen, 1);
2216 udf_write_aext(inode, &oepos, &eloc, elen, 1);
2217 if (!oepos.bh) {
2218 iinfo->i_lenAlloc -= (adsize * 2);
2219 mark_inode_dirty(inode);
2220 } else {
2221 aed = (struct allocExtDesc *)oepos.bh->b_data;
2222 le32_add_cpu(&aed->lengthAllocDescs, -(2 * adsize));
2223 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
2224 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201)
2225 udf_update_tag(oepos.bh->b_data,
2226 oepos.offset - (2 * adsize));
2227 else
2228 udf_update_tag(oepos.bh->b_data,
2229 sizeof(struct allocExtDesc));
2230 mark_buffer_dirty_inode(oepos.bh, inode);
2231 }
2232 } else {
2233 udf_write_aext(inode, &oepos, &eloc, elen, 1);
2234 if (!oepos.bh) {
2235 iinfo->i_lenAlloc -= adsize;
2236 mark_inode_dirty(inode);
2237 } else {
2238 aed = (struct allocExtDesc *)oepos.bh->b_data;
2239 le32_add_cpu(&aed->lengthAllocDescs, -adsize);
2240 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
2241 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201)
2242 udf_update_tag(oepos.bh->b_data,
2243 epos.offset - adsize);
2244 else
2245 udf_update_tag(oepos.bh->b_data,
2246 sizeof(struct allocExtDesc));
2247 mark_buffer_dirty_inode(oepos.bh, inode);
2248 }
2249 }
2250
2251 brelse(epos.bh);
2252 brelse(oepos.bh);
2253
2254 return (elen >> 30);
2255}
2256
2257int8_t inode_bmap(struct inode *inode, sector_t block,
2258 struct extent_position *pos, struct kernel_lb_addr *eloc,
2259 uint32_t *elen, sector_t *offset)
2260{
2261 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits;
2262 loff_t lbcount = 0, bcount = (loff_t) block << blocksize_bits;
2263 int8_t etype;
2264 struct udf_inode_info *iinfo;
2265
2266 iinfo = UDF_I(inode);
2267 if (!udf_read_extent_cache(inode, bcount, &lbcount, pos)) {
2268 pos->offset = 0;
2269 pos->block = iinfo->i_location;
2270 pos->bh = NULL;
2271 }
2272 *elen = 0;
2273 do {
2274 etype = udf_next_aext(inode, pos, eloc, elen, 1);
2275 if (etype == -1) {
2276 *offset = (bcount - lbcount) >> blocksize_bits;
2277 iinfo->i_lenExtents = lbcount;
2278 return -1;
2279 }
2280 lbcount += *elen;
2281 } while (lbcount <= bcount);
2282
2283 udf_update_extent_cache(inode, lbcount - *elen, pos);
2284 *offset = (bcount + *elen - lbcount) >> blocksize_bits;
2285
2286 return etype;
2287}
2288
2289udf_pblk_t udf_block_map(struct inode *inode, sector_t block)
2290{
2291 struct kernel_lb_addr eloc;
2292 uint32_t elen;
2293 sector_t offset;
2294 struct extent_position epos = {};
2295 udf_pblk_t ret;
2296
2297 down_read(&UDF_I(inode)->i_data_sem);
2298
2299 if (inode_bmap(inode, block, &epos, &eloc, &elen, &offset) ==
2300 (EXT_RECORDED_ALLOCATED >> 30))
2301 ret = udf_get_lb_pblock(inode->i_sb, &eloc, offset);
2302 else
2303 ret = 0;
2304
2305 up_read(&UDF_I(inode)->i_data_sem);
2306 brelse(epos.bh);
2307
2308 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_VARCONV))
2309 return udf_fixed_to_variable(ret);
2310 else
2311 return ret;
2312}
2313
