5 * Inode handling routines for the OSTA-UDF(tm) filesystem.
8 * This file is distributed under the terms of the GNU General Public
9 * License (GPL). Copies of the GPL can be obtained from:
10 * ftp://prep.ai.mit.edu/pub/gnu/GPL
11 * Each contributing author retains all rights to their own work.
13 * (C) 1998 Dave Boynton
14 * (C) 1998-2004 Ben Fennema
15 * (C) 1999-2000 Stelias Computing Inc
19 * 10/04/98 dgb Added rudimentary directory functions
20 * 10/07/98 Fully working udf_block_map! It works!
21 * 11/25/98 bmap altered to better support extents
22 * 12/06/98 blf partition support in udf_iget, udf_block_map
24 * 12/12/98 rewrote udf_block_map to handle next extents and descs across
25 * block boundaries (which is not actually allowed)
26 * 12/20/98 added support for strategy 4096
27 * 03/07/99 rewrote udf_block_map (again)
28 * New funcs, inode_bmap, udf_next_aext
29 * 04/19/99 Support for writing device EA's for major/minor #
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>
45 MODULE_AUTHOR("Ben Fennema");
46 MODULE_DESCRIPTION("Universal Disk Format Filesystem");
47 MODULE_LICENSE("GPL");
49 #define EXTENT_MERGE_SIZE 5
51 static mode_t udf_convert_permissions(struct fileEntry *);
52 static int udf_update_inode(struct inode *, int);
53 static void udf_fill_inode(struct inode *, struct buffer_head *);
54 static int udf_sync_inode(struct inode *inode);
55 static int udf_alloc_i_data(struct inode *inode, size_t size);
56 static struct buffer_head *inode_getblk(struct inode *, sector_t, int *,
58 static int8_t udf_insert_aext(struct inode *, struct extent_position,
59 struct kernel_lb_addr, uint32_t);
60 static void udf_split_extents(struct inode *, int *, int, int,
61 struct kernel_long_ad[EXTENT_MERGE_SIZE], int *);
62 static void udf_prealloc_extents(struct inode *, int, int,
63 struct kernel_long_ad[EXTENT_MERGE_SIZE], int *);
64 static void udf_merge_extents(struct inode *,
65 struct kernel_long_ad[EXTENT_MERGE_SIZE], int *);
66 static void udf_update_extents(struct inode *,
67 struct kernel_long_ad[EXTENT_MERGE_SIZE], int, int,
68 struct extent_position *);
69 static int udf_get_block(struct inode *, sector_t, struct buffer_head *, int);
72 void udf_evict_inode(struct inode *inode)
74 struct udf_inode_info *iinfo = UDF_I(inode);
77 if (!inode->i_nlink && !is_bad_inode(inode)) {
79 udf_setsize(inode, 0);
80 udf_update_inode(inode, IS_SYNC(inode));
82 truncate_inode_pages(&inode->i_data, 0);
83 invalidate_inode_buffers(inode);
85 if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB &&
86 inode->i_size != iinfo->i_lenExtents) {
87 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",
88 inode->i_ino, inode->i_mode,
89 (unsigned long long)inode->i_size,
90 (unsigned long long)iinfo->i_lenExtents);
92 kfree(iinfo->i_ext.i_data);
93 iinfo->i_ext.i_data = NULL;
95 udf_free_inode(inode);
99 static int udf_writepage(struct page *page, struct writeback_control *wbc)
101 return block_write_full_page(page, udf_get_block, wbc);
104 static int udf_readpage(struct file *file, struct page *page)
106 return mpage_readpage(page, udf_get_block);
109 static int udf_readpages(struct file *file, struct address_space *mapping,
110 struct list_head *pages, unsigned nr_pages)
112 return mpage_readpages(mapping, pages, nr_pages, udf_get_block);
115 static int udf_write_begin(struct file *file, struct address_space *mapping,
116 loff_t pos, unsigned len, unsigned flags,
117 struct page **pagep, void **fsdata)
121 ret = block_write_begin(mapping, pos, len, flags, pagep, udf_get_block);
123 struct inode *inode = mapping->host;
124 struct udf_inode_info *iinfo = UDF_I(inode);
125 loff_t isize = inode->i_size;
127 if (pos + len > isize) {
128 truncate_pagecache(inode, pos + len, isize);
129 if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
130 down_write(&iinfo->i_data_sem);
131 udf_truncate_extents(inode);
132 up_write(&iinfo->i_data_sem);
140 static sector_t udf_bmap(struct address_space *mapping, sector_t block)
142 return generic_block_bmap(mapping, block, udf_get_block);
145 const struct address_space_operations udf_aops = {
146 .readpage = udf_readpage,
147 .readpages = udf_readpages,
148 .writepage = udf_writepage,
149 .write_begin = udf_write_begin,
150 .write_end = generic_write_end,
154 int udf_expand_file_adinicb(struct inode *inode)
158 struct udf_inode_info *iinfo = UDF_I(inode);
160 struct writeback_control udf_wbc = {
161 .sync_mode = WB_SYNC_NONE,
165 if (!iinfo->i_lenAlloc) {
166 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))
167 iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT;
169 iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG;
170 /* from now on we have normal address_space methods */
171 inode->i_data.a_ops = &udf_aops;
172 mark_inode_dirty(inode);
176 page = find_or_create_page(inode->i_mapping, 0, GFP_NOFS);
180 if (!PageUptodate(page)) {
182 memset(kaddr + iinfo->i_lenAlloc, 0x00,
183 PAGE_CACHE_SIZE - iinfo->i_lenAlloc);
184 memcpy(kaddr, iinfo->i_ext.i_data + iinfo->i_lenEAttr,
186 flush_dcache_page(page);
187 SetPageUptodate(page);
190 memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr, 0x00,
192 iinfo->i_lenAlloc = 0;
193 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))
194 iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT;
196 iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG;
197 /* from now on we have normal address_space methods */
198 inode->i_data.a_ops = &udf_aops;
199 err = inode->i_data.a_ops->writepage(page, &udf_wbc);
201 /* Restore everything back so that we don't lose data... */
204 memcpy(iinfo->i_ext.i_data + iinfo->i_lenEAttr, kaddr,
208 iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB;
209 inode->i_data.a_ops = &udf_adinicb_aops;
211 page_cache_release(page);
212 mark_inode_dirty(inode);
217 struct buffer_head *udf_expand_dir_adinicb(struct inode *inode, int *block,
221 struct buffer_head *dbh = NULL;
222 struct kernel_lb_addr eloc;
224 struct extent_position epos;
226 struct udf_fileident_bh sfibh, dfibh;
227 loff_t f_pos = udf_ext0_offset(inode);
228 int size = udf_ext0_offset(inode) + inode->i_size;
229 struct fileIdentDesc cfi, *sfi, *dfi;
230 struct udf_inode_info *iinfo = UDF_I(inode);
232 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))
233 alloctype = ICBTAG_FLAG_AD_SHORT;
235 alloctype = ICBTAG_FLAG_AD_LONG;
237 if (!inode->i_size) {
238 iinfo->i_alloc_type = alloctype;
239 mark_inode_dirty(inode);
243 /* alloc block, and copy data to it */
244 *block = udf_new_block(inode->i_sb, inode,
245 iinfo->i_location.partitionReferenceNum,
246 iinfo->i_location.logicalBlockNum, err);
249 newblock = udf_get_pblock(inode->i_sb, *block,
250 iinfo->i_location.partitionReferenceNum,
254 dbh = udf_tgetblk(inode->i_sb, newblock);
258 memset(dbh->b_data, 0x00, inode->i_sb->s_blocksize);
259 set_buffer_uptodate(dbh);
261 mark_buffer_dirty_inode(dbh, inode);
263 sfibh.soffset = sfibh.eoffset =
264 f_pos & (inode->i_sb->s_blocksize - 1);
265 sfibh.sbh = sfibh.ebh = NULL;
266 dfibh.soffset = dfibh.eoffset = 0;
267 dfibh.sbh = dfibh.ebh = dbh;
268 while (f_pos < size) {
269 iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB;
270 sfi = udf_fileident_read(inode, &f_pos, &sfibh, &cfi, NULL,
276 iinfo->i_alloc_type = alloctype;
277 sfi->descTag.tagLocation = cpu_to_le32(*block);
278 dfibh.soffset = dfibh.eoffset;
279 dfibh.eoffset += (sfibh.eoffset - sfibh.soffset);
280 dfi = (struct fileIdentDesc *)(dbh->b_data + dfibh.soffset);
281 if (udf_write_fi(inode, sfi, dfi, &dfibh, sfi->impUse,
283 le16_to_cpu(sfi->lengthOfImpUse))) {
284 iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB;
289 mark_buffer_dirty_inode(dbh, inode);
291 memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr, 0,
293 iinfo->i_lenAlloc = 0;
294 eloc.logicalBlockNum = *block;
295 eloc.partitionReferenceNum =
296 iinfo->i_location.partitionReferenceNum;
297 iinfo->i_lenExtents = inode->i_size;
299 epos.block = iinfo->i_location;
300 epos.offset = udf_file_entry_alloc_offset(inode);
301 udf_add_aext(inode, &epos, &eloc, inode->i_size, 0);
305 mark_inode_dirty(inode);
309 static int udf_get_block(struct inode *inode, sector_t block,
310 struct buffer_head *bh_result, int create)
313 struct buffer_head *bh;
315 struct udf_inode_info *iinfo;
318 phys = udf_block_map(inode, block);
320 map_bh(bh_result, inode->i_sb, phys);
327 iinfo = UDF_I(inode);
329 down_write(&iinfo->i_data_sem);
330 if (block == iinfo->i_next_alloc_block + 1) {
331 iinfo->i_next_alloc_block++;
332 iinfo->i_next_alloc_goal++;
337 bh = inode_getblk(inode, block, &err, &phys, &new);
344 set_buffer_new(bh_result);
345 map_bh(bh_result, inode->i_sb, phys);
348 up_write(&iinfo->i_data_sem);
352 static struct buffer_head *udf_getblk(struct inode *inode, long block,
353 int create, int *err)
355 struct buffer_head *bh;
356 struct buffer_head dummy;
359 dummy.b_blocknr = -1000;
360 *err = udf_get_block(inode, block, &dummy, create);
361 if (!*err && buffer_mapped(&dummy)) {
362 bh = sb_getblk(inode->i_sb, dummy.b_blocknr);
363 if (buffer_new(&dummy)) {
365 memset(bh->b_data, 0x00, inode->i_sb->s_blocksize);
366 set_buffer_uptodate(bh);
368 mark_buffer_dirty_inode(bh, inode);
376 /* Extend the file by 'blocks' blocks, return the number of extents added */
377 static int udf_do_extend_file(struct inode *inode,
378 struct extent_position *last_pos,
379 struct kernel_long_ad *last_ext,
383 int count = 0, fake = !(last_ext->extLength & UDF_EXTENT_LENGTH_MASK);
384 struct super_block *sb = inode->i_sb;
385 struct kernel_lb_addr prealloc_loc = {};
386 int prealloc_len = 0;
387 struct udf_inode_info *iinfo;
390 /* The previous extent is fake and we should not extend by anything
391 * - there's nothing to do... */
395 iinfo = UDF_I(inode);
396 /* Round the last extent up to a multiple of block size */
397 if (last_ext->extLength & (sb->s_blocksize - 1)) {
398 last_ext->extLength =
399 (last_ext->extLength & UDF_EXTENT_FLAG_MASK) |
400 (((last_ext->extLength & UDF_EXTENT_LENGTH_MASK) +
401 sb->s_blocksize - 1) & ~(sb->s_blocksize - 1));
402 iinfo->i_lenExtents =
403 (iinfo->i_lenExtents + sb->s_blocksize - 1) &
404 ~(sb->s_blocksize - 1);
407 /* Last extent are just preallocated blocks? */
408 if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) ==
409 EXT_NOT_RECORDED_ALLOCATED) {
410 /* Save the extent so that we can reattach it to the end */
411 prealloc_loc = last_ext->extLocation;
412 prealloc_len = last_ext->extLength;
413 /* Mark the extent as a hole */
414 last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED |
415 (last_ext->extLength & UDF_EXTENT_LENGTH_MASK);
416 last_ext->extLocation.logicalBlockNum = 0;
417 last_ext->extLocation.partitionReferenceNum = 0;
420 /* Can we merge with the previous extent? */
421 if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) ==
422 EXT_NOT_RECORDED_NOT_ALLOCATED) {
423 add = ((1 << 30) - sb->s_blocksize -
424 (last_ext->extLength & UDF_EXTENT_LENGTH_MASK)) >>
425 sb->s_blocksize_bits;
429 last_ext->extLength += add << sb->s_blocksize_bits;
433 udf_add_aext(inode, last_pos, &last_ext->extLocation,
434 last_ext->extLength, 1);
437 udf_write_aext(inode, last_pos, &last_ext->extLocation,
438 last_ext->extLength, 1);
440 /* Managed to do everything necessary? */
444 /* All further extents will be NOT_RECORDED_NOT_ALLOCATED */
445 last_ext->extLocation.logicalBlockNum = 0;
446 last_ext->extLocation.partitionReferenceNum = 0;
447 add = (1 << (30-sb->s_blocksize_bits)) - 1;
448 last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED |
449 (add << sb->s_blocksize_bits);
451 /* Create enough extents to cover the whole hole */
452 while (blocks > add) {
454 err = udf_add_aext(inode, last_pos, &last_ext->extLocation,
455 last_ext->extLength, 1);
461 last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED |
462 (blocks << sb->s_blocksize_bits);
463 err = udf_add_aext(inode, last_pos, &last_ext->extLocation,
464 last_ext->extLength, 1);
471 /* Do we have some preallocated blocks saved? */
473 err = udf_add_aext(inode, last_pos, &prealloc_loc,
477 last_ext->extLocation = prealloc_loc;
478 last_ext->extLength = prealloc_len;
482 /* last_pos should point to the last written extent... */
483 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
484 last_pos->offset -= sizeof(struct short_ad);
485 else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
486 last_pos->offset -= sizeof(struct long_ad);
493 static int udf_extend_file(struct inode *inode, loff_t newsize)
496 struct extent_position epos;
497 struct kernel_lb_addr eloc;
500 struct super_block *sb = inode->i_sb;
501 sector_t first_block = newsize >> sb->s_blocksize_bits, offset;
503 struct udf_inode_info *iinfo = UDF_I(inode);
504 struct kernel_long_ad extent;
507 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
508 adsize = sizeof(struct short_ad);
509 else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
510 adsize = sizeof(struct long_ad);
514 etype = inode_bmap(inode, first_block, &epos, &eloc, &elen, &offset);
516 /* File has extent covering the new size (could happen when extending
517 * inside a block)? */
520 if (newsize & (sb->s_blocksize - 1))
522 /* Extended file just to the boundary of the last file block? */
526 /* Truncate is extending the file by 'offset' blocks */
527 if ((!epos.bh && epos.offset == udf_file_entry_alloc_offset(inode)) ||
528 (epos.bh && epos.offset == sizeof(struct allocExtDesc))) {
529 /* File has no extents at all or has empty last
530 * indirect extent! Create a fake extent... */
531 extent.extLocation.logicalBlockNum = 0;
532 extent.extLocation.partitionReferenceNum = 0;
533 extent.extLength = EXT_NOT_RECORDED_NOT_ALLOCATED;
535 epos.offset -= adsize;
536 etype = udf_next_aext(inode, &epos, &extent.extLocation,
537 &extent.extLength, 0);
538 extent.extLength |= etype << 30;
540 err = udf_do_extend_file(inode, &epos, &extent, offset);
544 iinfo->i_lenExtents = newsize;
550 static struct buffer_head *inode_getblk(struct inode *inode, sector_t block,
551 int *err, sector_t *phys, int *new)
553 static sector_t last_block;
554 struct buffer_head *result = NULL;
555 struct kernel_long_ad laarr[EXTENT_MERGE_SIZE];
556 struct extent_position prev_epos, cur_epos, next_epos;
557 int count = 0, startnum = 0, endnum = 0;
558 uint32_t elen = 0, tmpelen;
559 struct kernel_lb_addr eloc, tmpeloc;
561 loff_t lbcount = 0, b_off = 0;
562 uint32_t newblocknum, newblock;
565 struct udf_inode_info *iinfo = UDF_I(inode);
566 int goal = 0, pgoal = iinfo->i_location.logicalBlockNum;
569 prev_epos.offset = udf_file_entry_alloc_offset(inode);
570 prev_epos.block = iinfo->i_location;
572 cur_epos = next_epos = prev_epos;
573 b_off = (loff_t)block << inode->i_sb->s_blocksize_bits;
575 /* find the extent which contains the block we are looking for.
576 alternate between laarr[0] and laarr[1] for locations of the
577 current extent, and the previous extent */
579 if (prev_epos.bh != cur_epos.bh) {
580 brelse(prev_epos.bh);
582 prev_epos.bh = cur_epos.bh;
584 if (cur_epos.bh != next_epos.bh) {
586 get_bh(next_epos.bh);
587 cur_epos.bh = next_epos.bh;
592 prev_epos.block = cur_epos.block;
593 cur_epos.block = next_epos.block;
595 prev_epos.offset = cur_epos.offset;
596 cur_epos.offset = next_epos.offset;
598 etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 1);
604 laarr[c].extLength = (etype << 30) | elen;
605 laarr[c].extLocation = eloc;
607 if (etype != (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))
608 pgoal = eloc.logicalBlockNum +
609 ((elen + inode->i_sb->s_blocksize - 1) >>
610 inode->i_sb->s_blocksize_bits);
613 } while (lbcount + elen <= b_off);
616 offset = b_off >> inode->i_sb->s_blocksize_bits;
618 * Move prev_epos and cur_epos into indirect extent if we are at
621 udf_next_aext(inode, &prev_epos, &tmpeloc, &tmpelen, 0);
622 udf_next_aext(inode, &cur_epos, &tmpeloc, &tmpelen, 0);
624 /* if the extent is allocated and recorded, return the block
625 if the extent is not a multiple of the blocksize, round up */
627 if (etype == (EXT_RECORDED_ALLOCATED >> 30)) {
628 if (elen & (inode->i_sb->s_blocksize - 1)) {
629 elen = EXT_RECORDED_ALLOCATED |
630 ((elen + inode->i_sb->s_blocksize - 1) &
631 ~(inode->i_sb->s_blocksize - 1));
632 udf_write_aext(inode, &cur_epos, &eloc, elen, 1);
634 brelse(prev_epos.bh);
636 brelse(next_epos.bh);
637 newblock = udf_get_lb_pblock(inode->i_sb, &eloc, offset);
643 /* Are we beyond EOF? */
652 /* Create a fake extent when there's not one */
653 memset(&laarr[0].extLocation, 0x00,
654 sizeof(struct kernel_lb_addr));
655 laarr[0].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED;
656 /* Will udf_do_extend_file() create real extent from
658 startnum = (offset > 0);
660 /* Create extents for the hole between EOF and offset */
661 ret = udf_do_extend_file(inode, &prev_epos, laarr, offset);
663 brelse(prev_epos.bh);
665 brelse(next_epos.bh);
672 /* We are not covered by a preallocated extent? */
673 if ((laarr[0].extLength & UDF_EXTENT_FLAG_MASK) !=
674 EXT_NOT_RECORDED_ALLOCATED) {
675 /* Is there any real extent? - otherwise we overwrite
679 laarr[c].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED |
680 inode->i_sb->s_blocksize;
681 memset(&laarr[c].extLocation, 0x00,
682 sizeof(struct kernel_lb_addr));
689 endnum = startnum = ((count > 2) ? 2 : count);
691 /* if the current extent is in position 0,
692 swap it with the previous */
693 if (!c && count != 1) {
700 /* if the current block is located in an extent,
701 read the next extent */
702 etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 0);
704 laarr[c + 1].extLength = (etype << 30) | elen;
705 laarr[c + 1].extLocation = eloc;
713 /* if the current extent is not recorded but allocated, get the
714 * block in the extent corresponding to the requested block */
715 if ((laarr[c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30))
716 newblocknum = laarr[c].extLocation.logicalBlockNum + offset;
717 else { /* otherwise, allocate a new block */
718 if (iinfo->i_next_alloc_block == block)
719 goal = iinfo->i_next_alloc_goal;
722 if (!(goal = pgoal)) /* XXX: what was intended here? */
723 goal = iinfo->i_location.logicalBlockNum + 1;
726 newblocknum = udf_new_block(inode->i_sb, inode,
727 iinfo->i_location.partitionReferenceNum,
730 brelse(prev_epos.bh);
734 iinfo->i_lenExtents += inode->i_sb->s_blocksize;
737 /* if the extent the requsted block is located in contains multiple
738 * blocks, split the extent into at most three extents. blocks prior
739 * to requested block, requested block, and blocks after requested
741 udf_split_extents(inode, &c, offset, newblocknum, laarr, &endnum);
743 #ifdef UDF_PREALLOCATE
744 /* We preallocate blocks only for regular files. It also makes sense
745 * for directories but there's a problem when to drop the
746 * preallocation. We might use some delayed work for that but I feel
747 * it's overengineering for a filesystem like UDF. */
748 if (S_ISREG(inode->i_mode))
749 udf_prealloc_extents(inode, c, lastblock, laarr, &endnum);
752 /* merge any continuous blocks in laarr */
753 udf_merge_extents(inode, laarr, &endnum);
755 /* write back the new extents, inserting new extents if the new number
756 * of extents is greater than the old number, and deleting extents if
757 * the new number of extents is less than the old number */
758 udf_update_extents(inode, laarr, startnum, endnum, &prev_epos);
760 brelse(prev_epos.bh);
762 newblock = udf_get_pblock(inode->i_sb, newblocknum,
763 iinfo->i_location.partitionReferenceNum, 0);
769 iinfo->i_next_alloc_block = block;
770 iinfo->i_next_alloc_goal = newblocknum;
771 inode->i_ctime = current_fs_time(inode->i_sb);
774 udf_sync_inode(inode);
776 mark_inode_dirty(inode);
781 static void udf_split_extents(struct inode *inode, int *c, int offset,
783 struct kernel_long_ad laarr[EXTENT_MERGE_SIZE],
786 unsigned long blocksize = inode->i_sb->s_blocksize;
787 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits;
789 if ((laarr[*c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30) ||
790 (laarr[*c].extLength >> 30) ==
791 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) {
793 int blen = ((laarr[curr].extLength & UDF_EXTENT_LENGTH_MASK) +
794 blocksize - 1) >> blocksize_bits;
795 int8_t etype = (laarr[curr].extLength >> 30);
799 else if (!offset || blen == offset + 1) {
800 laarr[curr + 2] = laarr[curr + 1];
801 laarr[curr + 1] = laarr[curr];
803 laarr[curr + 3] = laarr[curr + 1];
804 laarr[curr + 2] = laarr[curr + 1] = laarr[curr];
808 if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30)) {
809 udf_free_blocks(inode->i_sb, inode,
810 &laarr[curr].extLocation,
812 laarr[curr].extLength =
813 EXT_NOT_RECORDED_NOT_ALLOCATED |
814 (offset << blocksize_bits);
815 laarr[curr].extLocation.logicalBlockNum = 0;
816 laarr[curr].extLocation.
817 partitionReferenceNum = 0;
819 laarr[curr].extLength = (etype << 30) |
820 (offset << blocksize_bits);
826 laarr[curr].extLocation.logicalBlockNum = newblocknum;
827 if (etype == (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))
828 laarr[curr].extLocation.partitionReferenceNum =
829 UDF_I(inode)->i_location.partitionReferenceNum;
830 laarr[curr].extLength = EXT_RECORDED_ALLOCATED |
834 if (blen != offset + 1) {
835 if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30))
836 laarr[curr].extLocation.logicalBlockNum +=
838 laarr[curr].extLength = (etype << 30) |
839 ((blen - (offset + 1)) << blocksize_bits);
846 static void udf_prealloc_extents(struct inode *inode, int c, int lastblock,
847 struct kernel_long_ad laarr[EXTENT_MERGE_SIZE],
850 int start, length = 0, currlength = 0, i;
852 if (*endnum >= (c + 1)) {
858 if ((laarr[c + 1].extLength >> 30) ==
859 (EXT_NOT_RECORDED_ALLOCATED >> 30)) {
861 length = currlength =
862 (((laarr[c + 1].extLength &
863 UDF_EXTENT_LENGTH_MASK) +
864 inode->i_sb->s_blocksize - 1) >>
865 inode->i_sb->s_blocksize_bits);
870 for (i = start + 1; i <= *endnum; i++) {
873 length += UDF_DEFAULT_PREALLOC_BLOCKS;
874 } else if ((laarr[i].extLength >> 30) ==
875 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) {
876 length += (((laarr[i].extLength &
877 UDF_EXTENT_LENGTH_MASK) +
878 inode->i_sb->s_blocksize - 1) >>
879 inode->i_sb->s_blocksize_bits);
885 int next = laarr[start].extLocation.logicalBlockNum +
886 (((laarr[start].extLength & UDF_EXTENT_LENGTH_MASK) +
887 inode->i_sb->s_blocksize - 1) >>
888 inode->i_sb->s_blocksize_bits);
889 int numalloc = udf_prealloc_blocks(inode->i_sb, inode,
890 laarr[start].extLocation.partitionReferenceNum,
891 next, (UDF_DEFAULT_PREALLOC_BLOCKS > length ?
892 length : UDF_DEFAULT_PREALLOC_BLOCKS) -
895 if (start == (c + 1))
896 laarr[start].extLength +=
898 inode->i_sb->s_blocksize_bits);
900 memmove(&laarr[c + 2], &laarr[c + 1],
901 sizeof(struct long_ad) * (*endnum - (c + 1)));
903 laarr[c + 1].extLocation.logicalBlockNum = next;
904 laarr[c + 1].extLocation.partitionReferenceNum =
905 laarr[c].extLocation.
906 partitionReferenceNum;
907 laarr[c + 1].extLength =
908 EXT_NOT_RECORDED_ALLOCATED |
910 inode->i_sb->s_blocksize_bits);
914 for (i = start + 1; numalloc && i < *endnum; i++) {
915 int elen = ((laarr[i].extLength &
916 UDF_EXTENT_LENGTH_MASK) +
917 inode->i_sb->s_blocksize - 1) >>
918 inode->i_sb->s_blocksize_bits;
920 if (elen > numalloc) {
921 laarr[i].extLength -=
923 inode->i_sb->s_blocksize_bits);
927 if (*endnum > (i + 1))
930 sizeof(struct long_ad) *
931 (*endnum - (i + 1)));
936 UDF_I(inode)->i_lenExtents +=
937 numalloc << inode->i_sb->s_blocksize_bits;
942 static void udf_merge_extents(struct inode *inode,
943 struct kernel_long_ad laarr[EXTENT_MERGE_SIZE],
947 unsigned long blocksize = inode->i_sb->s_blocksize;
948 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits;
950 for (i = 0; i < (*endnum - 1); i++) {
951 struct kernel_long_ad *li /*l[i]*/ = &laarr[i];
952 struct kernel_long_ad *lip1 /*l[i plus 1]*/ = &laarr[i + 1];
954 if (((li->extLength >> 30) == (lip1->extLength >> 30)) &&
955 (((li->extLength >> 30) ==
956 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) ||
957 ((lip1->extLocation.logicalBlockNum -
958 li->extLocation.logicalBlockNum) ==
959 (((li->extLength & UDF_EXTENT_LENGTH_MASK) +
960 blocksize - 1) >> blocksize_bits)))) {
962 if (((li->extLength & UDF_EXTENT_LENGTH_MASK) +
963 (lip1->extLength & UDF_EXTENT_LENGTH_MASK) +
964 blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) {
965 lip1->extLength = (lip1->extLength -
967 UDF_EXTENT_LENGTH_MASK) +
968 UDF_EXTENT_LENGTH_MASK) &
970 li->extLength = (li->extLength &
971 UDF_EXTENT_FLAG_MASK) +
972 (UDF_EXTENT_LENGTH_MASK + 1) -
974 lip1->extLocation.logicalBlockNum =
975 li->extLocation.logicalBlockNum +
977 UDF_EXTENT_LENGTH_MASK) >>
980 li->extLength = lip1->extLength +
982 UDF_EXTENT_LENGTH_MASK) +
983 blocksize - 1) & ~(blocksize - 1));
984 if (*endnum > (i + 2))
985 memmove(&laarr[i + 1], &laarr[i + 2],
986 sizeof(struct long_ad) *
987 (*endnum - (i + 2)));
991 } else if (((li->extLength >> 30) ==
992 (EXT_NOT_RECORDED_ALLOCATED >> 30)) &&
993 ((lip1->extLength >> 30) ==
994 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))) {
995 udf_free_blocks(inode->i_sb, inode, &li->extLocation, 0,
997 UDF_EXTENT_LENGTH_MASK) +
998 blocksize - 1) >> blocksize_bits);
999 li->extLocation.logicalBlockNum = 0;
1000 li->extLocation.partitionReferenceNum = 0;
1002 if (((li->extLength & UDF_EXTENT_LENGTH_MASK) +
1003 (lip1->extLength & UDF_EXTENT_LENGTH_MASK) +
1004 blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) {
1005 lip1->extLength = (lip1->extLength -
1007 UDF_EXTENT_LENGTH_MASK) +
1008 UDF_EXTENT_LENGTH_MASK) &
1010 li->extLength = (li->extLength &
1011 UDF_EXTENT_FLAG_MASK) +
1012 (UDF_EXTENT_LENGTH_MASK + 1) -
1015 li->extLength = lip1->extLength +
1017 UDF_EXTENT_LENGTH_MASK) +
1018 blocksize - 1) & ~(blocksize - 1));
1019 if (*endnum > (i + 2))
1020 memmove(&laarr[i + 1], &laarr[i + 2],
1021 sizeof(struct long_ad) *
1022 (*endnum - (i + 2)));
1026 } else if ((li->extLength >> 30) ==
1027 (EXT_NOT_RECORDED_ALLOCATED >> 30)) {
1028 udf_free_blocks(inode->i_sb, inode,
1029 &li->extLocation, 0,
1031 UDF_EXTENT_LENGTH_MASK) +
1032 blocksize - 1) >> blocksize_bits);
1033 li->extLocation.logicalBlockNum = 0;
1034 li->extLocation.partitionReferenceNum = 0;
1035 li->extLength = (li->extLength &
1036 UDF_EXTENT_LENGTH_MASK) |
1037 EXT_NOT_RECORDED_NOT_ALLOCATED;
1042 static void udf_update_extents(struct inode *inode,
1043 struct kernel_long_ad laarr[EXTENT_MERGE_SIZE],
1044 int startnum, int endnum,
1045 struct extent_position *epos)
1048 struct kernel_lb_addr tmploc;
1051 if (startnum > endnum) {
1052 for (i = 0; i < (startnum - endnum); i++)
1053 udf_delete_aext(inode, *epos, laarr[i].extLocation,
1054 laarr[i].extLength);
1055 } else if (startnum < endnum) {
1056 for (i = 0; i < (endnum - startnum); i++) {
1057 udf_insert_aext(inode, *epos, laarr[i].extLocation,
1058 laarr[i].extLength);
1059 udf_next_aext(inode, epos, &laarr[i].extLocation,
1060 &laarr[i].extLength, 1);
1065 for (i = start; i < endnum; i++) {
1066 udf_next_aext(inode, epos, &tmploc, &tmplen, 0);
1067 udf_write_aext(inode, epos, &laarr[i].extLocation,
1068 laarr[i].extLength, 1);
1072 struct buffer_head *udf_bread(struct inode *inode, int block,
1073 int create, int *err)
1075 struct buffer_head *bh = NULL;
1077 bh = udf_getblk(inode, block, create, err);
1081 if (buffer_uptodate(bh))
1084 ll_rw_block(READ, 1, &bh);
1087 if (buffer_uptodate(bh))
1095 int udf_setsize(struct inode *inode, loff_t newsize)
1098 struct udf_inode_info *iinfo;
1099 int bsize = 1 << inode->i_blkbits;
1101 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
1102 S_ISLNK(inode->i_mode)))
1104 if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
1107 iinfo = UDF_I(inode);
1108 if (newsize > inode->i_size) {
1109 down_write(&iinfo->i_data_sem);
1110 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
1112 (udf_file_entry_alloc_offset(inode) + newsize)) {
1113 err = udf_expand_file_adinicb(inode);
1115 up_write(&iinfo->i_data_sem);
1119 iinfo->i_lenAlloc = newsize;
1121 err = udf_extend_file(inode, newsize);
1123 up_write(&iinfo->i_data_sem);
1126 truncate_setsize(inode, newsize);
1127 up_write(&iinfo->i_data_sem);
1129 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
1130 down_write(&iinfo->i_data_sem);
1131 memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr + newsize,
1132 0x00, bsize - newsize -
1133 udf_file_entry_alloc_offset(inode));
1134 iinfo->i_lenAlloc = newsize;
1135 truncate_setsize(inode, newsize);
1136 up_write(&iinfo->i_data_sem);
1139 err = block_truncate_page(inode->i_mapping, newsize,
1143 down_write(&iinfo->i_data_sem);
1144 truncate_setsize(inode, newsize);
1145 udf_truncate_extents(inode);
1146 up_write(&iinfo->i_data_sem);
1149 inode->i_mtime = inode->i_ctime = current_fs_time(inode->i_sb);
1151 udf_sync_inode(inode);
1153 mark_inode_dirty(inode);
1157 static void __udf_read_inode(struct inode *inode)
1159 struct buffer_head *bh = NULL;
1160 struct fileEntry *fe;
1162 struct udf_inode_info *iinfo = UDF_I(inode);
1165 * Set defaults, but the inode is still incomplete!
1166 * Note: get_new_inode() sets the following on a new inode:
1169 * i_flags = sb->s_flags
1171 * clean_inode(): zero fills and sets
1176 bh = udf_read_ptagged(inode->i_sb, &iinfo->i_location, 0, &ident);
1178 udf_err(inode->i_sb, "(ino %ld) failed !bh\n", inode->i_ino);
1179 make_bad_inode(inode);
1183 if (ident != TAG_IDENT_FE && ident != TAG_IDENT_EFE &&
1184 ident != TAG_IDENT_USE) {
1185 udf_err(inode->i_sb, "(ino %ld) failed ident=%d\n",
1186 inode->i_ino, ident);
1188 make_bad_inode(inode);
1192 fe = (struct fileEntry *)bh->b_data;
1194 if (fe->icbTag.strategyType == cpu_to_le16(4096)) {
1195 struct buffer_head *ibh;
1197 ibh = udf_read_ptagged(inode->i_sb, &iinfo->i_location, 1,
1199 if (ident == TAG_IDENT_IE && ibh) {
1200 struct buffer_head *nbh = NULL;
1201 struct kernel_lb_addr loc;
1202 struct indirectEntry *ie;
1204 ie = (struct indirectEntry *)ibh->b_data;
1205 loc = lelb_to_cpu(ie->indirectICB.extLocation);
1207 if (ie->indirectICB.extLength &&
1208 (nbh = udf_read_ptagged(inode->i_sb, &loc, 0,
1210 if (ident == TAG_IDENT_FE ||
1211 ident == TAG_IDENT_EFE) {
1212 memcpy(&iinfo->i_location,
1214 sizeof(struct kernel_lb_addr));
1218 __udf_read_inode(inode);
1225 } else if (fe->icbTag.strategyType != cpu_to_le16(4)) {
1226 udf_err(inode->i_sb, "unsupported strategy type: %d\n",
1227 le16_to_cpu(fe->icbTag.strategyType));
1229 make_bad_inode(inode);
1232 udf_fill_inode(inode, bh);
1237 static void udf_fill_inode(struct inode *inode, struct buffer_head *bh)
1239 struct fileEntry *fe;
1240 struct extendedFileEntry *efe;
1242 struct udf_sb_info *sbi = UDF_SB(inode->i_sb);
1243 struct udf_inode_info *iinfo = UDF_I(inode);
1244 unsigned int link_count;
1246 fe = (struct fileEntry *)bh->b_data;
1247 efe = (struct extendedFileEntry *)bh->b_data;
1249 if (fe->icbTag.strategyType == cpu_to_le16(4))
1250 iinfo->i_strat4096 = 0;
1251 else /* if (fe->icbTag.strategyType == cpu_to_le16(4096)) */
1252 iinfo->i_strat4096 = 1;
1254 iinfo->i_alloc_type = le16_to_cpu(fe->icbTag.flags) &
1255 ICBTAG_FLAG_AD_MASK;
1256 iinfo->i_unique = 0;
1257 iinfo->i_lenEAttr = 0;
1258 iinfo->i_lenExtents = 0;
1259 iinfo->i_lenAlloc = 0;
1260 iinfo->i_next_alloc_block = 0;
1261 iinfo->i_next_alloc_goal = 0;
1262 if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_EFE)) {
1265 if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize -
1266 sizeof(struct extendedFileEntry))) {
1267 make_bad_inode(inode);
1270 memcpy(iinfo->i_ext.i_data,
1271 bh->b_data + sizeof(struct extendedFileEntry),
1272 inode->i_sb->s_blocksize -
1273 sizeof(struct extendedFileEntry));
1274 } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_FE)) {
1277 if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize -
1278 sizeof(struct fileEntry))) {
1279 make_bad_inode(inode);
1282 memcpy(iinfo->i_ext.i_data,
1283 bh->b_data + sizeof(struct fileEntry),
1284 inode->i_sb->s_blocksize - sizeof(struct fileEntry));
1285 } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_USE)) {
1288 iinfo->i_lenAlloc = le32_to_cpu(
1289 ((struct unallocSpaceEntry *)bh->b_data)->
1291 if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize -
1292 sizeof(struct unallocSpaceEntry))) {
1293 make_bad_inode(inode);
1296 memcpy(iinfo->i_ext.i_data,
1297 bh->b_data + sizeof(struct unallocSpaceEntry),
1298 inode->i_sb->s_blocksize -
1299 sizeof(struct unallocSpaceEntry));
1303 read_lock(&sbi->s_cred_lock);
1304 inode->i_uid = le32_to_cpu(fe->uid);
1305 if (inode->i_uid == -1 ||
1306 UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_IGNORE) ||
1307 UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_SET))
1308 inode->i_uid = UDF_SB(inode->i_sb)->s_uid;
1310 inode->i_gid = le32_to_cpu(fe->gid);
1311 if (inode->i_gid == -1 ||
1312 UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_IGNORE) ||
1313 UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_SET))
1314 inode->i_gid = UDF_SB(inode->i_sb)->s_gid;
1316 if (fe->icbTag.fileType != ICBTAG_FILE_TYPE_DIRECTORY &&
1317 sbi->s_fmode != UDF_INVALID_MODE)
1318 inode->i_mode = sbi->s_fmode;
1319 else if (fe->icbTag.fileType == ICBTAG_FILE_TYPE_DIRECTORY &&
1320 sbi->s_dmode != UDF_INVALID_MODE)
1321 inode->i_mode = sbi->s_dmode;
1323 inode->i_mode = udf_convert_permissions(fe);
1324 inode->i_mode &= ~sbi->s_umask;
1325 read_unlock(&sbi->s_cred_lock);
1327 link_count = le16_to_cpu(fe->fileLinkCount);
1330 set_nlink(inode, link_count);
1332 inode->i_size = le64_to_cpu(fe->informationLength);
1333 iinfo->i_lenExtents = inode->i_size;
1335 if (iinfo->i_efe == 0) {
1336 inode->i_blocks = le64_to_cpu(fe->logicalBlocksRecorded) <<
1337 (inode->i_sb->s_blocksize_bits - 9);
1339 if (!udf_disk_stamp_to_time(&inode->i_atime, fe->accessTime))
1340 inode->i_atime = sbi->s_record_time;
1342 if (!udf_disk_stamp_to_time(&inode->i_mtime,
1343 fe->modificationTime))
1344 inode->i_mtime = sbi->s_record_time;
1346 if (!udf_disk_stamp_to_time(&inode->i_ctime, fe->attrTime))
1347 inode->i_ctime = sbi->s_record_time;
1349 iinfo->i_unique = le64_to_cpu(fe->uniqueID);
1350 iinfo->i_lenEAttr = le32_to_cpu(fe->lengthExtendedAttr);
1351 iinfo->i_lenAlloc = le32_to_cpu(fe->lengthAllocDescs);
1352 offset = sizeof(struct fileEntry) + iinfo->i_lenEAttr;
1354 inode->i_blocks = le64_to_cpu(efe->logicalBlocksRecorded) <<
1355 (inode->i_sb->s_blocksize_bits - 9);
1357 if (!udf_disk_stamp_to_time(&inode->i_atime, efe->accessTime))
1358 inode->i_atime = sbi->s_record_time;
1360 if (!udf_disk_stamp_to_time(&inode->i_mtime,
1361 efe->modificationTime))
1362 inode->i_mtime = sbi->s_record_time;
1364 if (!udf_disk_stamp_to_time(&iinfo->i_crtime, efe->createTime))
1365 iinfo->i_crtime = sbi->s_record_time;
1367 if (!udf_disk_stamp_to_time(&inode->i_ctime, efe->attrTime))
1368 inode->i_ctime = sbi->s_record_time;
1370 iinfo->i_unique = le64_to_cpu(efe->uniqueID);
1371 iinfo->i_lenEAttr = le32_to_cpu(efe->lengthExtendedAttr);
1372 iinfo->i_lenAlloc = le32_to_cpu(efe->lengthAllocDescs);
1373 offset = sizeof(struct extendedFileEntry) +
1377 switch (fe->icbTag.fileType) {
1378 case ICBTAG_FILE_TYPE_DIRECTORY:
1379 inode->i_op = &udf_dir_inode_operations;
1380 inode->i_fop = &udf_dir_operations;
1381 inode->i_mode |= S_IFDIR;
1384 case ICBTAG_FILE_TYPE_REALTIME:
1385 case ICBTAG_FILE_TYPE_REGULAR:
1386 case ICBTAG_FILE_TYPE_UNDEF:
1387 case ICBTAG_FILE_TYPE_VAT20:
1388 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
1389 inode->i_data.a_ops = &udf_adinicb_aops;
1391 inode->i_data.a_ops = &udf_aops;
1392 inode->i_op = &udf_file_inode_operations;
1393 inode->i_fop = &udf_file_operations;
1394 inode->i_mode |= S_IFREG;
1396 case ICBTAG_FILE_TYPE_BLOCK:
1397 inode->i_mode |= S_IFBLK;
1399 case ICBTAG_FILE_TYPE_CHAR:
1400 inode->i_mode |= S_IFCHR;
1402 case ICBTAG_FILE_TYPE_FIFO:
1403 init_special_inode(inode, inode->i_mode | S_IFIFO, 0);
1405 case ICBTAG_FILE_TYPE_SOCKET:
1406 init_special_inode(inode, inode->i_mode | S_IFSOCK, 0);
1408 case ICBTAG_FILE_TYPE_SYMLINK:
1409 inode->i_data.a_ops = &udf_symlink_aops;
1410 inode->i_op = &udf_symlink_inode_operations;
1411 inode->i_mode = S_IFLNK | S_IRWXUGO;
1413 case ICBTAG_FILE_TYPE_MAIN:
1414 udf_debug("METADATA FILE-----\n");
1416 case ICBTAG_FILE_TYPE_MIRROR:
1417 udf_debug("METADATA MIRROR FILE-----\n");
1419 case ICBTAG_FILE_TYPE_BITMAP:
1420 udf_debug("METADATA BITMAP FILE-----\n");
1423 udf_err(inode->i_sb, "(ino %ld) failed unknown file type=%d\n",
1424 inode->i_ino, fe->icbTag.fileType);
1425 make_bad_inode(inode);
1428 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
1429 struct deviceSpec *dsea =
1430 (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1);
1432 init_special_inode(inode, inode->i_mode,
1433 MKDEV(le32_to_cpu(dsea->majorDeviceIdent),
1434 le32_to_cpu(dsea->minorDeviceIdent)));
1435 /* Developer ID ??? */
1437 make_bad_inode(inode);
1441 static int udf_alloc_i_data(struct inode *inode, size_t size)
1443 struct udf_inode_info *iinfo = UDF_I(inode);
1444 iinfo->i_ext.i_data = kmalloc(size, GFP_KERNEL);
1446 if (!iinfo->i_ext.i_data) {
1447 udf_err(inode->i_sb, "(ino %ld) no free memory\n",
1455 static mode_t udf_convert_permissions(struct fileEntry *fe)
1458 uint32_t permissions;
1461 permissions = le32_to_cpu(fe->permissions);
1462 flags = le16_to_cpu(fe->icbTag.flags);
1464 mode = ((permissions) & S_IRWXO) |
1465 ((permissions >> 2) & S_IRWXG) |
1466 ((permissions >> 4) & S_IRWXU) |
1467 ((flags & ICBTAG_FLAG_SETUID) ? S_ISUID : 0) |
1468 ((flags & ICBTAG_FLAG_SETGID) ? S_ISGID : 0) |
1469 ((flags & ICBTAG_FLAG_STICKY) ? S_ISVTX : 0);
1474 int udf_write_inode(struct inode *inode, struct writeback_control *wbc)
1476 return udf_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL);
1479 static int udf_sync_inode(struct inode *inode)
1481 return udf_update_inode(inode, 1);
1484 static int udf_update_inode(struct inode *inode, int do_sync)
1486 struct buffer_head *bh = NULL;
1487 struct fileEntry *fe;
1488 struct extendedFileEntry *efe;
1493 struct udf_sb_info *sbi = UDF_SB(inode->i_sb);
1494 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits;
1495 struct udf_inode_info *iinfo = UDF_I(inode);
1497 bh = udf_tgetblk(inode->i_sb,
1498 udf_get_lb_pblock(inode->i_sb, &iinfo->i_location, 0));
1500 udf_debug("getblk failure\n");
1505 memset(bh->b_data, 0, inode->i_sb->s_blocksize);
1506 fe = (struct fileEntry *)bh->b_data;
1507 efe = (struct extendedFileEntry *)bh->b_data;
1510 struct unallocSpaceEntry *use =
1511 (struct unallocSpaceEntry *)bh->b_data;
1513 use->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc);
1514 memcpy(bh->b_data + sizeof(struct unallocSpaceEntry),
1515 iinfo->i_ext.i_data, inode->i_sb->s_blocksize -
1516 sizeof(struct unallocSpaceEntry));
1517 use->descTag.tagIdent = cpu_to_le16(TAG_IDENT_USE);
1518 use->descTag.tagLocation =
1519 cpu_to_le32(iinfo->i_location.logicalBlockNum);
1520 crclen = sizeof(struct unallocSpaceEntry) +
1521 iinfo->i_lenAlloc - sizeof(struct tag);
1522 use->descTag.descCRCLength = cpu_to_le16(crclen);
1523 use->descTag.descCRC = cpu_to_le16(crc_itu_t(0, (char *)use +
1526 use->descTag.tagChecksum = udf_tag_checksum(&use->descTag);
1531 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_FORGET))
1532 fe->uid = cpu_to_le32(-1);
1534 fe->uid = cpu_to_le32(inode->i_uid);
1536 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_FORGET))
1537 fe->gid = cpu_to_le32(-1);
1539 fe->gid = cpu_to_le32(inode->i_gid);
1541 udfperms = ((inode->i_mode & S_IRWXO)) |
1542 ((inode->i_mode & S_IRWXG) << 2) |
1543 ((inode->i_mode & S_IRWXU) << 4);
1545 udfperms |= (le32_to_cpu(fe->permissions) &
1546 (FE_PERM_O_DELETE | FE_PERM_O_CHATTR |
1547 FE_PERM_G_DELETE | FE_PERM_G_CHATTR |
1548 FE_PERM_U_DELETE | FE_PERM_U_CHATTR));
1549 fe->permissions = cpu_to_le32(udfperms);
1551 if (S_ISDIR(inode->i_mode))
1552 fe->fileLinkCount = cpu_to_le16(inode->i_nlink - 1);
1554 fe->fileLinkCount = cpu_to_le16(inode->i_nlink);
1556 fe->informationLength = cpu_to_le64(inode->i_size);
1558 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
1560 struct deviceSpec *dsea =
1561 (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1);
1563 dsea = (struct deviceSpec *)
1564 udf_add_extendedattr(inode,
1565 sizeof(struct deviceSpec) +
1566 sizeof(struct regid), 12, 0x3);
1567 dsea->attrType = cpu_to_le32(12);
1568 dsea->attrSubtype = 1;
1569 dsea->attrLength = cpu_to_le32(
1570 sizeof(struct deviceSpec) +
1571 sizeof(struct regid));
1572 dsea->impUseLength = cpu_to_le32(sizeof(struct regid));
1574 eid = (struct regid *)dsea->impUse;
1575 memset(eid, 0, sizeof(struct regid));
1576 strcpy(eid->ident, UDF_ID_DEVELOPER);
1577 eid->identSuffix[0] = UDF_OS_CLASS_UNIX;
1578 eid->identSuffix[1] = UDF_OS_ID_LINUX;
1579 dsea->majorDeviceIdent = cpu_to_le32(imajor(inode));
1580 dsea->minorDeviceIdent = cpu_to_le32(iminor(inode));
1583 if (iinfo->i_efe == 0) {
1584 memcpy(bh->b_data + sizeof(struct fileEntry),
1585 iinfo->i_ext.i_data,
1586 inode->i_sb->s_blocksize - sizeof(struct fileEntry));
1587 fe->logicalBlocksRecorded = cpu_to_le64(
1588 (inode->i_blocks + (1 << (blocksize_bits - 9)) - 1) >>
1589 (blocksize_bits - 9));
1591 udf_time_to_disk_stamp(&fe->accessTime, inode->i_atime);
1592 udf_time_to_disk_stamp(&fe->modificationTime, inode->i_mtime);
1593 udf_time_to_disk_stamp(&fe->attrTime, inode->i_ctime);
1594 memset(&(fe->impIdent), 0, sizeof(struct regid));
1595 strcpy(fe->impIdent.ident, UDF_ID_DEVELOPER);
1596 fe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1597 fe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1598 fe->uniqueID = cpu_to_le64(iinfo->i_unique);
1599 fe->lengthExtendedAttr = cpu_to_le32(iinfo->i_lenEAttr);
1600 fe->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc);
1601 fe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_FE);
1602 crclen = sizeof(struct fileEntry);
1604 memcpy(bh->b_data + sizeof(struct extendedFileEntry),
1605 iinfo->i_ext.i_data,
1606 inode->i_sb->s_blocksize -
1607 sizeof(struct extendedFileEntry));
1608 efe->objectSize = cpu_to_le64(inode->i_size);
1609 efe->logicalBlocksRecorded = cpu_to_le64(
1610 (inode->i_blocks + (1 << (blocksize_bits - 9)) - 1) >>
1611 (blocksize_bits - 9));
1613 if (iinfo->i_crtime.tv_sec > inode->i_atime.tv_sec ||
1614 (iinfo->i_crtime.tv_sec == inode->i_atime.tv_sec &&
1615 iinfo->i_crtime.tv_nsec > inode->i_atime.tv_nsec))
1616 iinfo->i_crtime = inode->i_atime;
1618 if (iinfo->i_crtime.tv_sec > inode->i_mtime.tv_sec ||
1619 (iinfo->i_crtime.tv_sec == inode->i_mtime.tv_sec &&
1620 iinfo->i_crtime.tv_nsec > inode->i_mtime.tv_nsec))
1621 iinfo->i_crtime = inode->i_mtime;
1623 if (iinfo->i_crtime.tv_sec > inode->i_ctime.tv_sec ||
1624 (iinfo->i_crtime.tv_sec == inode->i_ctime.tv_sec &&
1625 iinfo->i_crtime.tv_nsec > inode->i_ctime.tv_nsec))
1626 iinfo->i_crtime = inode->i_ctime;
1628 udf_time_to_disk_stamp(&efe->accessTime, inode->i_atime);
1629 udf_time_to_disk_stamp(&efe->modificationTime, inode->i_mtime);
1630 udf_time_to_disk_stamp(&efe->createTime, iinfo->i_crtime);
1631 udf_time_to_disk_stamp(&efe->attrTime, inode->i_ctime);
1633 memset(&(efe->impIdent), 0, sizeof(struct regid));
1634 strcpy(efe->impIdent.ident, UDF_ID_DEVELOPER);
1635 efe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1636 efe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1637 efe->uniqueID = cpu_to_le64(iinfo->i_unique);
1638 efe->lengthExtendedAttr = cpu_to_le32(iinfo->i_lenEAttr);
1639 efe->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc);
1640 efe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_EFE);
1641 crclen = sizeof(struct extendedFileEntry);
1643 if (iinfo->i_strat4096) {
1644 fe->icbTag.strategyType = cpu_to_le16(4096);
1645 fe->icbTag.strategyParameter = cpu_to_le16(1);
1646 fe->icbTag.numEntries = cpu_to_le16(2);
1648 fe->icbTag.strategyType = cpu_to_le16(4);
1649 fe->icbTag.numEntries = cpu_to_le16(1);
1652 if (S_ISDIR(inode->i_mode))
1653 fe->icbTag.fileType = ICBTAG_FILE_TYPE_DIRECTORY;
1654 else if (S_ISREG(inode->i_mode))
1655 fe->icbTag.fileType = ICBTAG_FILE_TYPE_REGULAR;
1656 else if (S_ISLNK(inode->i_mode))
1657 fe->icbTag.fileType = ICBTAG_FILE_TYPE_SYMLINK;
1658 else if (S_ISBLK(inode->i_mode))
1659 fe->icbTag.fileType = ICBTAG_FILE_TYPE_BLOCK;
1660 else if (S_ISCHR(inode->i_mode))
1661 fe->icbTag.fileType = ICBTAG_FILE_TYPE_CHAR;
1662 else if (S_ISFIFO(inode->i_mode))
1663 fe->icbTag.fileType = ICBTAG_FILE_TYPE_FIFO;
1664 else if (S_ISSOCK(inode->i_mode))
1665 fe->icbTag.fileType = ICBTAG_FILE_TYPE_SOCKET;
1667 icbflags = iinfo->i_alloc_type |
1668 ((inode->i_mode & S_ISUID) ? ICBTAG_FLAG_SETUID : 0) |
1669 ((inode->i_mode & S_ISGID) ? ICBTAG_FLAG_SETGID : 0) |
1670 ((inode->i_mode & S_ISVTX) ? ICBTAG_FLAG_STICKY : 0) |
1671 (le16_to_cpu(fe->icbTag.flags) &
1672 ~(ICBTAG_FLAG_AD_MASK | ICBTAG_FLAG_SETUID |
1673 ICBTAG_FLAG_SETGID | ICBTAG_FLAG_STICKY));
1675 fe->icbTag.flags = cpu_to_le16(icbflags);
1676 if (sbi->s_udfrev >= 0x0200)
1677 fe->descTag.descVersion = cpu_to_le16(3);
1679 fe->descTag.descVersion = cpu_to_le16(2);
1680 fe->descTag.tagSerialNum = cpu_to_le16(sbi->s_serial_number);
1681 fe->descTag.tagLocation = cpu_to_le32(
1682 iinfo->i_location.logicalBlockNum);
1683 crclen += iinfo->i_lenEAttr + iinfo->i_lenAlloc - sizeof(struct tag);
1684 fe->descTag.descCRCLength = cpu_to_le16(crclen);
1685 fe->descTag.descCRC = cpu_to_le16(crc_itu_t(0, (char *)fe + sizeof(struct tag),
1687 fe->descTag.tagChecksum = udf_tag_checksum(&fe->descTag);
1690 set_buffer_uptodate(bh);
1693 /* write the data blocks */
1694 mark_buffer_dirty(bh);
1696 sync_dirty_buffer(bh);
1697 if (buffer_write_io_error(bh)) {
1698 udf_warn(inode->i_sb, "IO error syncing udf inode [%08lx]\n",
1708 struct inode *udf_iget(struct super_block *sb, struct kernel_lb_addr *ino)
1710 unsigned long block = udf_get_lb_pblock(sb, ino, 0);
1711 struct inode *inode = iget_locked(sb, block);
1716 if (inode->i_state & I_NEW) {
1717 memcpy(&UDF_I(inode)->i_location, ino, sizeof(struct kernel_lb_addr));
1718 __udf_read_inode(inode);
1719 unlock_new_inode(inode);
1722 if (is_bad_inode(inode))
1725 if (ino->logicalBlockNum >= UDF_SB(sb)->
1726 s_partmaps[ino->partitionReferenceNum].s_partition_len) {
1727 udf_debug("block=%d, partition=%d out of range\n",
1728 ino->logicalBlockNum, ino->partitionReferenceNum);
1729 make_bad_inode(inode);
1740 int udf_add_aext(struct inode *inode, struct extent_position *epos,
1741 struct kernel_lb_addr *eloc, uint32_t elen, int inc)
1744 struct short_ad *sad = NULL;
1745 struct long_ad *lad = NULL;
1746 struct allocExtDesc *aed;
1748 struct udf_inode_info *iinfo = UDF_I(inode);
1751 ptr = iinfo->i_ext.i_data + epos->offset -
1752 udf_file_entry_alloc_offset(inode) +
1755 ptr = epos->bh->b_data + epos->offset;
1757 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
1758 adsize = sizeof(struct short_ad);
1759 else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
1760 adsize = sizeof(struct long_ad);
1764 if (epos->offset + (2 * adsize) > inode->i_sb->s_blocksize) {
1765 unsigned char *sptr, *dptr;
1766 struct buffer_head *nbh;
1768 struct kernel_lb_addr obloc = epos->block;
1770 epos->block.logicalBlockNum = udf_new_block(inode->i_sb, NULL,
1771 obloc.partitionReferenceNum,
1772 obloc.logicalBlockNum, &err);
1773 if (!epos->block.logicalBlockNum)
1775 nbh = udf_tgetblk(inode->i_sb, udf_get_lb_pblock(inode->i_sb,
1781 memset(nbh->b_data, 0x00, inode->i_sb->s_blocksize);
1782 set_buffer_uptodate(nbh);
1784 mark_buffer_dirty_inode(nbh, inode);
1786 aed = (struct allocExtDesc *)(nbh->b_data);
1787 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT))
1788 aed->previousAllocExtLocation =
1789 cpu_to_le32(obloc.logicalBlockNum);
1790 if (epos->offset + adsize > inode->i_sb->s_blocksize) {
1791 loffset = epos->offset;
1792 aed->lengthAllocDescs = cpu_to_le32(adsize);
1793 sptr = ptr - adsize;
1794 dptr = nbh->b_data + sizeof(struct allocExtDesc);
1795 memcpy(dptr, sptr, adsize);
1796 epos->offset = sizeof(struct allocExtDesc) + adsize;
1798 loffset = epos->offset + adsize;
1799 aed->lengthAllocDescs = cpu_to_le32(0);
1801 epos->offset = sizeof(struct allocExtDesc);
1804 aed = (struct allocExtDesc *)epos->bh->b_data;
1805 le32_add_cpu(&aed->lengthAllocDescs, adsize);
1807 iinfo->i_lenAlloc += adsize;
1808 mark_inode_dirty(inode);
1811 if (UDF_SB(inode->i_sb)->s_udfrev >= 0x0200)
1812 udf_new_tag(nbh->b_data, TAG_IDENT_AED, 3, 1,
1813 epos->block.logicalBlockNum, sizeof(struct tag));
1815 udf_new_tag(nbh->b_data, TAG_IDENT_AED, 2, 1,
1816 epos->block.logicalBlockNum, sizeof(struct tag));
1817 switch (iinfo->i_alloc_type) {
1818 case ICBTAG_FLAG_AD_SHORT:
1819 sad = (struct short_ad *)sptr;
1820 sad->extLength = cpu_to_le32(EXT_NEXT_EXTENT_ALLOCDECS |
1821 inode->i_sb->s_blocksize);
1823 cpu_to_le32(epos->block.logicalBlockNum);
1825 case ICBTAG_FLAG_AD_LONG:
1826 lad = (struct long_ad *)sptr;
1827 lad->extLength = cpu_to_le32(EXT_NEXT_EXTENT_ALLOCDECS |
1828 inode->i_sb->s_blocksize);
1829 lad->extLocation = cpu_to_lelb(epos->block);
1830 memset(lad->impUse, 0x00, sizeof(lad->impUse));
1834 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
1835 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201)
1836 udf_update_tag(epos->bh->b_data, loffset);
1838 udf_update_tag(epos->bh->b_data,
1839 sizeof(struct allocExtDesc));
1840 mark_buffer_dirty_inode(epos->bh, inode);
1843 mark_inode_dirty(inode);
1848 udf_write_aext(inode, epos, eloc, elen, inc);
1851 iinfo->i_lenAlloc += adsize;
1852 mark_inode_dirty(inode);
1854 aed = (struct allocExtDesc *)epos->bh->b_data;
1855 le32_add_cpu(&aed->lengthAllocDescs, adsize);
1856 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
1857 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201)
1858 udf_update_tag(epos->bh->b_data,
1859 epos->offset + (inc ? 0 : adsize));
1861 udf_update_tag(epos->bh->b_data,
1862 sizeof(struct allocExtDesc));
1863 mark_buffer_dirty_inode(epos->bh, inode);
1869 void udf_write_aext(struct inode *inode, struct extent_position *epos,
1870 struct kernel_lb_addr *eloc, uint32_t elen, int inc)
1874 struct short_ad *sad;
1875 struct long_ad *lad;
1876 struct udf_inode_info *iinfo = UDF_I(inode);
1879 ptr = iinfo->i_ext.i_data + epos->offset -
1880 udf_file_entry_alloc_offset(inode) +
1883 ptr = epos->bh->b_data + epos->offset;
1885 switch (iinfo->i_alloc_type) {
1886 case ICBTAG_FLAG_AD_SHORT:
1887 sad = (struct short_ad *)ptr;
1888 sad->extLength = cpu_to_le32(elen);
1889 sad->extPosition = cpu_to_le32(eloc->logicalBlockNum);
1890 adsize = sizeof(struct short_ad);
1892 case ICBTAG_FLAG_AD_LONG:
1893 lad = (struct long_ad *)ptr;
1894 lad->extLength = cpu_to_le32(elen);
1895 lad->extLocation = cpu_to_lelb(*eloc);
1896 memset(lad->impUse, 0x00, sizeof(lad->impUse));
1897 adsize = sizeof(struct long_ad);
1904 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
1905 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) {
1906 struct allocExtDesc *aed =
1907 (struct allocExtDesc *)epos->bh->b_data;
1908 udf_update_tag(epos->bh->b_data,
1909 le32_to_cpu(aed->lengthAllocDescs) +
1910 sizeof(struct allocExtDesc));
1912 mark_buffer_dirty_inode(epos->bh, inode);
1914 mark_inode_dirty(inode);
1918 epos->offset += adsize;
1921 int8_t udf_next_aext(struct inode *inode, struct extent_position *epos,
1922 struct kernel_lb_addr *eloc, uint32_t *elen, int inc)
1926 while ((etype = udf_current_aext(inode, epos, eloc, elen, inc)) ==
1927 (EXT_NEXT_EXTENT_ALLOCDECS >> 30)) {
1929 epos->block = *eloc;
1930 epos->offset = sizeof(struct allocExtDesc);
1932 block = udf_get_lb_pblock(inode->i_sb, &epos->block, 0);
1933 epos->bh = udf_tread(inode->i_sb, block);
1935 udf_debug("reading block %d failed!\n", block);
1943 int8_t udf_current_aext(struct inode *inode, struct extent_position *epos,
1944 struct kernel_lb_addr *eloc, uint32_t *elen, int inc)
1949 struct short_ad *sad;
1950 struct long_ad *lad;
1951 struct udf_inode_info *iinfo = UDF_I(inode);
1955 epos->offset = udf_file_entry_alloc_offset(inode);
1956 ptr = iinfo->i_ext.i_data + epos->offset -
1957 udf_file_entry_alloc_offset(inode) +
1959 alen = udf_file_entry_alloc_offset(inode) +
1963 epos->offset = sizeof(struct allocExtDesc);
1964 ptr = epos->bh->b_data + epos->offset;
1965 alen = sizeof(struct allocExtDesc) +
1966 le32_to_cpu(((struct allocExtDesc *)epos->bh->b_data)->
1970 switch (iinfo->i_alloc_type) {
1971 case ICBTAG_FLAG_AD_SHORT:
1972 sad = udf_get_fileshortad(ptr, alen, &epos->offset, inc);
1975 etype = le32_to_cpu(sad->extLength) >> 30;
1976 eloc->logicalBlockNum = le32_to_cpu(sad->extPosition);
1977 eloc->partitionReferenceNum =
1978 iinfo->i_location.partitionReferenceNum;
1979 *elen = le32_to_cpu(sad->extLength) & UDF_EXTENT_LENGTH_MASK;
1981 case ICBTAG_FLAG_AD_LONG:
1982 lad = udf_get_filelongad(ptr, alen, &epos->offset, inc);
1985 etype = le32_to_cpu(lad->extLength) >> 30;
1986 *eloc = lelb_to_cpu(lad->extLocation);
1987 *elen = le32_to_cpu(lad->extLength) & UDF_EXTENT_LENGTH_MASK;
1990 udf_debug("alloc_type = %d unsupported\n", iinfo->i_alloc_type);
1997 static int8_t udf_insert_aext(struct inode *inode, struct extent_position epos,
1998 struct kernel_lb_addr neloc, uint32_t nelen)
2000 struct kernel_lb_addr oeloc;
2007 while ((etype = udf_next_aext(inode, &epos, &oeloc, &oelen, 0)) != -1) {
2008 udf_write_aext(inode, &epos, &neloc, nelen, 1);
2010 nelen = (etype << 30) | oelen;
2012 udf_add_aext(inode, &epos, &neloc, nelen, 1);
2015 return (nelen >> 30);
2018 int8_t udf_delete_aext(struct inode *inode, struct extent_position epos,
2019 struct kernel_lb_addr eloc, uint32_t elen)
2021 struct extent_position oepos;
2024 struct allocExtDesc *aed;
2025 struct udf_inode_info *iinfo;
2032 iinfo = UDF_I(inode);
2033 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
2034 adsize = sizeof(struct short_ad);
2035 else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
2036 adsize = sizeof(struct long_ad);
2041 if (udf_next_aext(inode, &epos, &eloc, &elen, 1) == -1)
2044 while ((etype = udf_next_aext(inode, &epos, &eloc, &elen, 1)) != -1) {
2045 udf_write_aext(inode, &oepos, &eloc, (etype << 30) | elen, 1);
2046 if (oepos.bh != epos.bh) {
2047 oepos.block = epos.block;
2051 oepos.offset = epos.offset - adsize;
2054 memset(&eloc, 0x00, sizeof(struct kernel_lb_addr));
2057 if (epos.bh != oepos.bh) {
2058 udf_free_blocks(inode->i_sb, inode, &epos.block, 0, 1);
2059 udf_write_aext(inode, &oepos, &eloc, elen, 1);
2060 udf_write_aext(inode, &oepos, &eloc, elen, 1);
2062 iinfo->i_lenAlloc -= (adsize * 2);
2063 mark_inode_dirty(inode);
2065 aed = (struct allocExtDesc *)oepos.bh->b_data;
2066 le32_add_cpu(&aed->lengthAllocDescs, -(2 * adsize));
2067 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
2068 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201)
2069 udf_update_tag(oepos.bh->b_data,
2070 oepos.offset - (2 * adsize));
2072 udf_update_tag(oepos.bh->b_data,
2073 sizeof(struct allocExtDesc));
2074 mark_buffer_dirty_inode(oepos.bh, inode);
2077 udf_write_aext(inode, &oepos, &eloc, elen, 1);
2079 iinfo->i_lenAlloc -= adsize;
2080 mark_inode_dirty(inode);
2082 aed = (struct allocExtDesc *)oepos.bh->b_data;
2083 le32_add_cpu(&aed->lengthAllocDescs, -adsize);
2084 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
2085 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201)
2086 udf_update_tag(oepos.bh->b_data,
2087 epos.offset - adsize);
2089 udf_update_tag(oepos.bh->b_data,
2090 sizeof(struct allocExtDesc));
2091 mark_buffer_dirty_inode(oepos.bh, inode);
2098 return (elen >> 30);
2101 int8_t inode_bmap(struct inode *inode, sector_t block,
2102 struct extent_position *pos, struct kernel_lb_addr *eloc,
2103 uint32_t *elen, sector_t *offset)
2105 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits;
2106 loff_t lbcount = 0, bcount =
2107 (loff_t) block << blocksize_bits;
2109 struct udf_inode_info *iinfo;
2111 iinfo = UDF_I(inode);
2113 pos->block = iinfo->i_location;
2118 etype = udf_next_aext(inode, pos, eloc, elen, 1);
2120 *offset = (bcount - lbcount) >> blocksize_bits;
2121 iinfo->i_lenExtents = lbcount;
2125 } while (lbcount <= bcount);
2127 *offset = (bcount + *elen - lbcount) >> blocksize_bits;
2132 long udf_block_map(struct inode *inode, sector_t block)
2134 struct kernel_lb_addr eloc;
2137 struct extent_position epos = {};
2140 down_read(&UDF_I(inode)->i_data_sem);
2142 if (inode_bmap(inode, block, &epos, &eloc, &elen, &offset) ==
2143 (EXT_RECORDED_ALLOCATED >> 30))
2144 ret = udf_get_lb_pblock(inode->i_sb, &eloc, offset);
2148 up_read(&UDF_I(inode)->i_data_sem);
2151 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_VARCONV))
2152 return udf_fixed_to_variable(ret);