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>
44 MODULE_AUTHOR("Ben Fennema");
45 MODULE_DESCRIPTION("Universal Disk Format Filesystem");
46 MODULE_LICENSE("GPL");
48 #define EXTENT_MERGE_SIZE 5
50 static mode_t udf_convert_permissions(struct fileEntry *);
51 static int udf_update_inode(struct inode *, int);
52 static void udf_fill_inode(struct inode *, struct buffer_head *);
53 static int udf_sync_inode(struct inode *inode);
54 static int udf_alloc_i_data(struct inode *inode, size_t size);
55 static struct buffer_head *inode_getblk(struct inode *, sector_t, int *,
57 static int8_t udf_insert_aext(struct inode *, struct extent_position,
58 struct kernel_lb_addr, uint32_t);
59 static void udf_split_extents(struct inode *, int *, int, int,
60 struct kernel_long_ad[EXTENT_MERGE_SIZE], int *);
61 static void udf_prealloc_extents(struct inode *, int, int,
62 struct kernel_long_ad[EXTENT_MERGE_SIZE], int *);
63 static void udf_merge_extents(struct inode *,
64 struct kernel_long_ad[EXTENT_MERGE_SIZE], int *);
65 static void udf_update_extents(struct inode *,
66 struct kernel_long_ad[EXTENT_MERGE_SIZE], int, int,
67 struct extent_position *);
68 static int udf_get_block(struct inode *, sector_t, struct buffer_head *, int);
71 void udf_evict_inode(struct inode *inode)
73 struct udf_inode_info *iinfo = UDF_I(inode);
76 if (!inode->i_nlink && !is_bad_inode(inode)) {
78 udf_setsize(inode, 0);
79 udf_update_inode(inode, IS_SYNC(inode));
81 truncate_inode_pages(&inode->i_data, 0);
82 invalidate_inode_buffers(inode);
84 if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB &&
85 inode->i_size != iinfo->i_lenExtents) {
86 printk(KERN_WARNING "UDF-fs (%s): Inode %lu (mode %o) has "
87 "inode size %llu different from extent length %llu. "
88 "Filesystem need not be standards compliant.\n",
89 inode->i_sb->s_id, inode->i_ino, inode->i_mode,
90 (unsigned long long)inode->i_size,
91 (unsigned long long)iinfo->i_lenExtents);
93 kfree(iinfo->i_ext.i_data);
94 iinfo->i_ext.i_data = NULL;
96 udf_free_inode(inode);
100 static int udf_writepage(struct page *page, struct writeback_control *wbc)
102 return block_write_full_page(page, udf_get_block, wbc);
105 static int udf_readpage(struct file *file, struct page *page)
107 return block_read_full_page(page, udf_get_block);
110 static int udf_write_begin(struct file *file, struct address_space *mapping,
111 loff_t pos, unsigned len, unsigned flags,
112 struct page **pagep, void **fsdata)
116 ret = block_write_begin(mapping, pos, len, flags, pagep, udf_get_block);
118 struct inode *inode = mapping->host;
119 struct udf_inode_info *iinfo = UDF_I(inode);
120 loff_t isize = inode->i_size;
122 if (pos + len > isize) {
123 truncate_pagecache(inode, pos + len, isize);
124 if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
125 down_write(&iinfo->i_data_sem);
126 udf_truncate_extents(inode);
127 up_write(&iinfo->i_data_sem);
135 static sector_t udf_bmap(struct address_space *mapping, sector_t block)
137 return generic_block_bmap(mapping, block, udf_get_block);
140 const struct address_space_operations udf_aops = {
141 .readpage = udf_readpage,
142 .writepage = udf_writepage,
143 .write_begin = udf_write_begin,
144 .write_end = generic_write_end,
148 int udf_expand_file_adinicb(struct inode *inode)
152 struct udf_inode_info *iinfo = UDF_I(inode);
154 struct writeback_control udf_wbc = {
155 .sync_mode = WB_SYNC_NONE,
159 if (!iinfo->i_lenAlloc) {
160 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))
161 iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT;
163 iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG;
164 /* from now on we have normal address_space methods */
165 inode->i_data.a_ops = &udf_aops;
166 mark_inode_dirty(inode);
170 page = find_or_create_page(inode->i_mapping, 0, GFP_NOFS);
174 if (!PageUptodate(page)) {
176 memset(kaddr + iinfo->i_lenAlloc, 0x00,
177 PAGE_CACHE_SIZE - iinfo->i_lenAlloc);
178 memcpy(kaddr, iinfo->i_ext.i_data + iinfo->i_lenEAttr,
180 flush_dcache_page(page);
181 SetPageUptodate(page);
184 memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr, 0x00,
186 iinfo->i_lenAlloc = 0;
187 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))
188 iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT;
190 iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG;
191 /* from now on we have normal address_space methods */
192 inode->i_data.a_ops = &udf_aops;
193 err = inode->i_data.a_ops->writepage(page, &udf_wbc);
195 /* Restore everything back so that we don't lose data... */
198 memcpy(iinfo->i_ext.i_data + iinfo->i_lenEAttr, kaddr,
202 iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB;
203 inode->i_data.a_ops = &udf_adinicb_aops;
205 page_cache_release(page);
206 mark_inode_dirty(inode);
211 struct buffer_head *udf_expand_dir_adinicb(struct inode *inode, int *block,
215 struct buffer_head *dbh = NULL;
216 struct kernel_lb_addr eloc;
218 struct extent_position epos;
220 struct udf_fileident_bh sfibh, dfibh;
221 loff_t f_pos = udf_ext0_offset(inode);
222 int size = udf_ext0_offset(inode) + inode->i_size;
223 struct fileIdentDesc cfi, *sfi, *dfi;
224 struct udf_inode_info *iinfo = UDF_I(inode);
226 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))
227 alloctype = ICBTAG_FLAG_AD_SHORT;
229 alloctype = ICBTAG_FLAG_AD_LONG;
231 if (!inode->i_size) {
232 iinfo->i_alloc_type = alloctype;
233 mark_inode_dirty(inode);
237 /* alloc block, and copy data to it */
238 *block = udf_new_block(inode->i_sb, inode,
239 iinfo->i_location.partitionReferenceNum,
240 iinfo->i_location.logicalBlockNum, err);
243 newblock = udf_get_pblock(inode->i_sb, *block,
244 iinfo->i_location.partitionReferenceNum,
248 dbh = udf_tgetblk(inode->i_sb, newblock);
252 memset(dbh->b_data, 0x00, inode->i_sb->s_blocksize);
253 set_buffer_uptodate(dbh);
255 mark_buffer_dirty_inode(dbh, inode);
257 sfibh.soffset = sfibh.eoffset =
258 f_pos & (inode->i_sb->s_blocksize - 1);
259 sfibh.sbh = sfibh.ebh = NULL;
260 dfibh.soffset = dfibh.eoffset = 0;
261 dfibh.sbh = dfibh.ebh = dbh;
262 while (f_pos < size) {
263 iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB;
264 sfi = udf_fileident_read(inode, &f_pos, &sfibh, &cfi, NULL,
270 iinfo->i_alloc_type = alloctype;
271 sfi->descTag.tagLocation = cpu_to_le32(*block);
272 dfibh.soffset = dfibh.eoffset;
273 dfibh.eoffset += (sfibh.eoffset - sfibh.soffset);
274 dfi = (struct fileIdentDesc *)(dbh->b_data + dfibh.soffset);
275 if (udf_write_fi(inode, sfi, dfi, &dfibh, sfi->impUse,
277 le16_to_cpu(sfi->lengthOfImpUse))) {
278 iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB;
283 mark_buffer_dirty_inode(dbh, inode);
285 memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr, 0,
287 iinfo->i_lenAlloc = 0;
288 eloc.logicalBlockNum = *block;
289 eloc.partitionReferenceNum =
290 iinfo->i_location.partitionReferenceNum;
291 iinfo->i_lenExtents = inode->i_size;
293 epos.block = iinfo->i_location;
294 epos.offset = udf_file_entry_alloc_offset(inode);
295 udf_add_aext(inode, &epos, &eloc, inode->i_size, 0);
299 mark_inode_dirty(inode);
303 static int udf_get_block(struct inode *inode, sector_t block,
304 struct buffer_head *bh_result, int create)
307 struct buffer_head *bh;
309 struct udf_inode_info *iinfo;
312 phys = udf_block_map(inode, block);
314 map_bh(bh_result, inode->i_sb, phys);
321 iinfo = UDF_I(inode);
323 down_write(&iinfo->i_data_sem);
324 if (block == iinfo->i_next_alloc_block + 1) {
325 iinfo->i_next_alloc_block++;
326 iinfo->i_next_alloc_goal++;
331 bh = inode_getblk(inode, block, &err, &phys, &new);
338 set_buffer_new(bh_result);
339 map_bh(bh_result, inode->i_sb, phys);
342 up_write(&iinfo->i_data_sem);
346 static struct buffer_head *udf_getblk(struct inode *inode, long block,
347 int create, int *err)
349 struct buffer_head *bh;
350 struct buffer_head dummy;
353 dummy.b_blocknr = -1000;
354 *err = udf_get_block(inode, block, &dummy, create);
355 if (!*err && buffer_mapped(&dummy)) {
356 bh = sb_getblk(inode->i_sb, dummy.b_blocknr);
357 if (buffer_new(&dummy)) {
359 memset(bh->b_data, 0x00, inode->i_sb->s_blocksize);
360 set_buffer_uptodate(bh);
362 mark_buffer_dirty_inode(bh, inode);
370 /* Extend the file by 'blocks' blocks, return the number of extents added */
371 static int udf_do_extend_file(struct inode *inode,
372 struct extent_position *last_pos,
373 struct kernel_long_ad *last_ext,
377 int count = 0, fake = !(last_ext->extLength & UDF_EXTENT_LENGTH_MASK);
378 struct super_block *sb = inode->i_sb;
379 struct kernel_lb_addr prealloc_loc = {};
380 int prealloc_len = 0;
381 struct udf_inode_info *iinfo;
384 /* The previous extent is fake and we should not extend by anything
385 * - there's nothing to do... */
389 iinfo = UDF_I(inode);
390 /* Round the last extent up to a multiple of block size */
391 if (last_ext->extLength & (sb->s_blocksize - 1)) {
392 last_ext->extLength =
393 (last_ext->extLength & UDF_EXTENT_FLAG_MASK) |
394 (((last_ext->extLength & UDF_EXTENT_LENGTH_MASK) +
395 sb->s_blocksize - 1) & ~(sb->s_blocksize - 1));
396 iinfo->i_lenExtents =
397 (iinfo->i_lenExtents + sb->s_blocksize - 1) &
398 ~(sb->s_blocksize - 1);
401 /* Last extent are just preallocated blocks? */
402 if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) ==
403 EXT_NOT_RECORDED_ALLOCATED) {
404 /* Save the extent so that we can reattach it to the end */
405 prealloc_loc = last_ext->extLocation;
406 prealloc_len = last_ext->extLength;
407 /* Mark the extent as a hole */
408 last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED |
409 (last_ext->extLength & UDF_EXTENT_LENGTH_MASK);
410 last_ext->extLocation.logicalBlockNum = 0;
411 last_ext->extLocation.partitionReferenceNum = 0;
414 /* Can we merge with the previous extent? */
415 if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) ==
416 EXT_NOT_RECORDED_NOT_ALLOCATED) {
417 add = ((1 << 30) - sb->s_blocksize -
418 (last_ext->extLength & UDF_EXTENT_LENGTH_MASK)) >>
419 sb->s_blocksize_bits;
423 last_ext->extLength += add << sb->s_blocksize_bits;
427 udf_add_aext(inode, last_pos, &last_ext->extLocation,
428 last_ext->extLength, 1);
431 udf_write_aext(inode, last_pos, &last_ext->extLocation,
432 last_ext->extLength, 1);
434 /* Managed to do everything necessary? */
438 /* All further extents will be NOT_RECORDED_NOT_ALLOCATED */
439 last_ext->extLocation.logicalBlockNum = 0;
440 last_ext->extLocation.partitionReferenceNum = 0;
441 add = (1 << (30-sb->s_blocksize_bits)) - 1;
442 last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED |
443 (add << sb->s_blocksize_bits);
445 /* Create enough extents to cover the whole hole */
446 while (blocks > add) {
448 err = udf_add_aext(inode, last_pos, &last_ext->extLocation,
449 last_ext->extLength, 1);
455 last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED |
456 (blocks << sb->s_blocksize_bits);
457 err = udf_add_aext(inode, last_pos, &last_ext->extLocation,
458 last_ext->extLength, 1);
465 /* Do we have some preallocated blocks saved? */
467 err = udf_add_aext(inode, last_pos, &prealloc_loc,
471 last_ext->extLocation = prealloc_loc;
472 last_ext->extLength = prealloc_len;
476 /* last_pos should point to the last written extent... */
477 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
478 last_pos->offset -= sizeof(struct short_ad);
479 else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
480 last_pos->offset -= sizeof(struct long_ad);
487 static int udf_extend_file(struct inode *inode, loff_t newsize)
490 struct extent_position epos;
491 struct kernel_lb_addr eloc;
494 struct super_block *sb = inode->i_sb;
495 sector_t first_block = newsize >> sb->s_blocksize_bits, offset;
497 struct udf_inode_info *iinfo = UDF_I(inode);
498 struct kernel_long_ad extent;
501 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
502 adsize = sizeof(struct short_ad);
503 else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
504 adsize = sizeof(struct long_ad);
508 etype = inode_bmap(inode, first_block, &epos, &eloc, &elen, &offset);
510 /* File has extent covering the new size (could happen when extending
511 * inside a block)? */
514 if (newsize & (sb->s_blocksize - 1))
516 /* Extended file just to the boundary of the last file block? */
520 /* Truncate is extending the file by 'offset' blocks */
521 if ((!epos.bh && epos.offset == udf_file_entry_alloc_offset(inode)) ||
522 (epos.bh && epos.offset == sizeof(struct allocExtDesc))) {
523 /* File has no extents at all or has empty last
524 * indirect extent! Create a fake extent... */
525 extent.extLocation.logicalBlockNum = 0;
526 extent.extLocation.partitionReferenceNum = 0;
527 extent.extLength = EXT_NOT_RECORDED_NOT_ALLOCATED;
529 epos.offset -= adsize;
530 etype = udf_next_aext(inode, &epos, &extent.extLocation,
531 &extent.extLength, 0);
532 extent.extLength |= etype << 30;
534 err = udf_do_extend_file(inode, &epos, &extent, offset);
538 iinfo->i_lenExtents = newsize;
544 static struct buffer_head *inode_getblk(struct inode *inode, sector_t block,
545 int *err, sector_t *phys, int *new)
547 static sector_t last_block;
548 struct buffer_head *result = NULL;
549 struct kernel_long_ad laarr[EXTENT_MERGE_SIZE];
550 struct extent_position prev_epos, cur_epos, next_epos;
551 int count = 0, startnum = 0, endnum = 0;
552 uint32_t elen = 0, tmpelen;
553 struct kernel_lb_addr eloc, tmpeloc;
555 loff_t lbcount = 0, b_off = 0;
556 uint32_t newblocknum, newblock;
559 struct udf_inode_info *iinfo = UDF_I(inode);
560 int goal = 0, pgoal = iinfo->i_location.logicalBlockNum;
563 prev_epos.offset = udf_file_entry_alloc_offset(inode);
564 prev_epos.block = iinfo->i_location;
566 cur_epos = next_epos = prev_epos;
567 b_off = (loff_t)block << inode->i_sb->s_blocksize_bits;
569 /* find the extent which contains the block we are looking for.
570 alternate between laarr[0] and laarr[1] for locations of the
571 current extent, and the previous extent */
573 if (prev_epos.bh != cur_epos.bh) {
574 brelse(prev_epos.bh);
576 prev_epos.bh = cur_epos.bh;
578 if (cur_epos.bh != next_epos.bh) {
580 get_bh(next_epos.bh);
581 cur_epos.bh = next_epos.bh;
586 prev_epos.block = cur_epos.block;
587 cur_epos.block = next_epos.block;
589 prev_epos.offset = cur_epos.offset;
590 cur_epos.offset = next_epos.offset;
592 etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 1);
598 laarr[c].extLength = (etype << 30) | elen;
599 laarr[c].extLocation = eloc;
601 if (etype != (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))
602 pgoal = eloc.logicalBlockNum +
603 ((elen + inode->i_sb->s_blocksize - 1) >>
604 inode->i_sb->s_blocksize_bits);
607 } while (lbcount + elen <= b_off);
610 offset = b_off >> inode->i_sb->s_blocksize_bits;
612 * Move prev_epos and cur_epos into indirect extent if we are at
615 udf_next_aext(inode, &prev_epos, &tmpeloc, &tmpelen, 0);
616 udf_next_aext(inode, &cur_epos, &tmpeloc, &tmpelen, 0);
618 /* if the extent is allocated and recorded, return the block
619 if the extent is not a multiple of the blocksize, round up */
621 if (etype == (EXT_RECORDED_ALLOCATED >> 30)) {
622 if (elen & (inode->i_sb->s_blocksize - 1)) {
623 elen = EXT_RECORDED_ALLOCATED |
624 ((elen + inode->i_sb->s_blocksize - 1) &
625 ~(inode->i_sb->s_blocksize - 1));
626 udf_write_aext(inode, &cur_epos, &eloc, elen, 1);
628 brelse(prev_epos.bh);
630 brelse(next_epos.bh);
631 newblock = udf_get_lb_pblock(inode->i_sb, &eloc, offset);
637 /* Are we beyond EOF? */
646 /* Create a fake extent when there's not one */
647 memset(&laarr[0].extLocation, 0x00,
648 sizeof(struct kernel_lb_addr));
649 laarr[0].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED;
650 /* Will udf_do_extend_file() create real extent from
652 startnum = (offset > 0);
654 /* Create extents for the hole between EOF and offset */
655 ret = udf_do_extend_file(inode, &prev_epos, laarr, offset);
657 brelse(prev_epos.bh);
659 brelse(next_epos.bh);
666 /* We are not covered by a preallocated extent? */
667 if ((laarr[0].extLength & UDF_EXTENT_FLAG_MASK) !=
668 EXT_NOT_RECORDED_ALLOCATED) {
669 /* Is there any real extent? - otherwise we overwrite
673 laarr[c].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED |
674 inode->i_sb->s_blocksize;
675 memset(&laarr[c].extLocation, 0x00,
676 sizeof(struct kernel_lb_addr));
683 endnum = startnum = ((count > 2) ? 2 : count);
685 /* if the current extent is in position 0,
686 swap it with the previous */
687 if (!c && count != 1) {
694 /* if the current block is located in an extent,
695 read the next extent */
696 etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 0);
698 laarr[c + 1].extLength = (etype << 30) | elen;
699 laarr[c + 1].extLocation = eloc;
707 /* if the current extent is not recorded but allocated, get the
708 * block in the extent corresponding to the requested block */
709 if ((laarr[c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30))
710 newblocknum = laarr[c].extLocation.logicalBlockNum + offset;
711 else { /* otherwise, allocate a new block */
712 if (iinfo->i_next_alloc_block == block)
713 goal = iinfo->i_next_alloc_goal;
716 if (!(goal = pgoal)) /* XXX: what was intended here? */
717 goal = iinfo->i_location.logicalBlockNum + 1;
720 newblocknum = udf_new_block(inode->i_sb, inode,
721 iinfo->i_location.partitionReferenceNum,
724 brelse(prev_epos.bh);
728 iinfo->i_lenExtents += inode->i_sb->s_blocksize;
731 /* if the extent the requsted block is located in contains multiple
732 * blocks, split the extent into at most three extents. blocks prior
733 * to requested block, requested block, and blocks after requested
735 udf_split_extents(inode, &c, offset, newblocknum, laarr, &endnum);
737 #ifdef UDF_PREALLOCATE
738 /* We preallocate blocks only for regular files. It also makes sense
739 * for directories but there's a problem when to drop the
740 * preallocation. We might use some delayed work for that but I feel
741 * it's overengineering for a filesystem like UDF. */
742 if (S_ISREG(inode->i_mode))
743 udf_prealloc_extents(inode, c, lastblock, laarr, &endnum);
746 /* merge any continuous blocks in laarr */
747 udf_merge_extents(inode, laarr, &endnum);
749 /* write back the new extents, inserting new extents if the new number
750 * of extents is greater than the old number, and deleting extents if
751 * the new number of extents is less than the old number */
752 udf_update_extents(inode, laarr, startnum, endnum, &prev_epos);
754 brelse(prev_epos.bh);
756 newblock = udf_get_pblock(inode->i_sb, newblocknum,
757 iinfo->i_location.partitionReferenceNum, 0);
763 iinfo->i_next_alloc_block = block;
764 iinfo->i_next_alloc_goal = newblocknum;
765 inode->i_ctime = current_fs_time(inode->i_sb);
768 udf_sync_inode(inode);
770 mark_inode_dirty(inode);
775 static void udf_split_extents(struct inode *inode, int *c, int offset,
777 struct kernel_long_ad laarr[EXTENT_MERGE_SIZE],
780 unsigned long blocksize = inode->i_sb->s_blocksize;
781 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits;
783 if ((laarr[*c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30) ||
784 (laarr[*c].extLength >> 30) ==
785 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) {
787 int blen = ((laarr[curr].extLength & UDF_EXTENT_LENGTH_MASK) +
788 blocksize - 1) >> blocksize_bits;
789 int8_t etype = (laarr[curr].extLength >> 30);
793 else if (!offset || blen == offset + 1) {
794 laarr[curr + 2] = laarr[curr + 1];
795 laarr[curr + 1] = laarr[curr];
797 laarr[curr + 3] = laarr[curr + 1];
798 laarr[curr + 2] = laarr[curr + 1] = laarr[curr];
802 if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30)) {
803 udf_free_blocks(inode->i_sb, inode,
804 &laarr[curr].extLocation,
806 laarr[curr].extLength =
807 EXT_NOT_RECORDED_NOT_ALLOCATED |
808 (offset << blocksize_bits);
809 laarr[curr].extLocation.logicalBlockNum = 0;
810 laarr[curr].extLocation.
811 partitionReferenceNum = 0;
813 laarr[curr].extLength = (etype << 30) |
814 (offset << blocksize_bits);
820 laarr[curr].extLocation.logicalBlockNum = newblocknum;
821 if (etype == (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))
822 laarr[curr].extLocation.partitionReferenceNum =
823 UDF_I(inode)->i_location.partitionReferenceNum;
824 laarr[curr].extLength = EXT_RECORDED_ALLOCATED |
828 if (blen != offset + 1) {
829 if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30))
830 laarr[curr].extLocation.logicalBlockNum +=
832 laarr[curr].extLength = (etype << 30) |
833 ((blen - (offset + 1)) << blocksize_bits);
840 static void udf_prealloc_extents(struct inode *inode, int c, int lastblock,
841 struct kernel_long_ad laarr[EXTENT_MERGE_SIZE],
844 int start, length = 0, currlength = 0, i;
846 if (*endnum >= (c + 1)) {
852 if ((laarr[c + 1].extLength >> 30) ==
853 (EXT_NOT_RECORDED_ALLOCATED >> 30)) {
855 length = currlength =
856 (((laarr[c + 1].extLength &
857 UDF_EXTENT_LENGTH_MASK) +
858 inode->i_sb->s_blocksize - 1) >>
859 inode->i_sb->s_blocksize_bits);
864 for (i = start + 1; i <= *endnum; i++) {
867 length += UDF_DEFAULT_PREALLOC_BLOCKS;
868 } else if ((laarr[i].extLength >> 30) ==
869 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) {
870 length += (((laarr[i].extLength &
871 UDF_EXTENT_LENGTH_MASK) +
872 inode->i_sb->s_blocksize - 1) >>
873 inode->i_sb->s_blocksize_bits);
879 int next = laarr[start].extLocation.logicalBlockNum +
880 (((laarr[start].extLength & UDF_EXTENT_LENGTH_MASK) +
881 inode->i_sb->s_blocksize - 1) >>
882 inode->i_sb->s_blocksize_bits);
883 int numalloc = udf_prealloc_blocks(inode->i_sb, inode,
884 laarr[start].extLocation.partitionReferenceNum,
885 next, (UDF_DEFAULT_PREALLOC_BLOCKS > length ?
886 length : UDF_DEFAULT_PREALLOC_BLOCKS) -
889 if (start == (c + 1))
890 laarr[start].extLength +=
892 inode->i_sb->s_blocksize_bits);
894 memmove(&laarr[c + 2], &laarr[c + 1],
895 sizeof(struct long_ad) * (*endnum - (c + 1)));
897 laarr[c + 1].extLocation.logicalBlockNum = next;
898 laarr[c + 1].extLocation.partitionReferenceNum =
899 laarr[c].extLocation.
900 partitionReferenceNum;
901 laarr[c + 1].extLength =
902 EXT_NOT_RECORDED_ALLOCATED |
904 inode->i_sb->s_blocksize_bits);
908 for (i = start + 1; numalloc && i < *endnum; i++) {
909 int elen = ((laarr[i].extLength &
910 UDF_EXTENT_LENGTH_MASK) +
911 inode->i_sb->s_blocksize - 1) >>
912 inode->i_sb->s_blocksize_bits;
914 if (elen > numalloc) {
915 laarr[i].extLength -=
917 inode->i_sb->s_blocksize_bits);
921 if (*endnum > (i + 1))
924 sizeof(struct long_ad) *
925 (*endnum - (i + 1)));
930 UDF_I(inode)->i_lenExtents +=
931 numalloc << inode->i_sb->s_blocksize_bits;
936 static void udf_merge_extents(struct inode *inode,
937 struct kernel_long_ad laarr[EXTENT_MERGE_SIZE],
941 unsigned long blocksize = inode->i_sb->s_blocksize;
942 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits;
944 for (i = 0; i < (*endnum - 1); i++) {
945 struct kernel_long_ad *li /*l[i]*/ = &laarr[i];
946 struct kernel_long_ad *lip1 /*l[i plus 1]*/ = &laarr[i + 1];
948 if (((li->extLength >> 30) == (lip1->extLength >> 30)) &&
949 (((li->extLength >> 30) ==
950 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) ||
951 ((lip1->extLocation.logicalBlockNum -
952 li->extLocation.logicalBlockNum) ==
953 (((li->extLength & UDF_EXTENT_LENGTH_MASK) +
954 blocksize - 1) >> blocksize_bits)))) {
956 if (((li->extLength & UDF_EXTENT_LENGTH_MASK) +
957 (lip1->extLength & UDF_EXTENT_LENGTH_MASK) +
958 blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) {
959 lip1->extLength = (lip1->extLength -
961 UDF_EXTENT_LENGTH_MASK) +
962 UDF_EXTENT_LENGTH_MASK) &
964 li->extLength = (li->extLength &
965 UDF_EXTENT_FLAG_MASK) +
966 (UDF_EXTENT_LENGTH_MASK + 1) -
968 lip1->extLocation.logicalBlockNum =
969 li->extLocation.logicalBlockNum +
971 UDF_EXTENT_LENGTH_MASK) >>
974 li->extLength = lip1->extLength +
976 UDF_EXTENT_LENGTH_MASK) +
977 blocksize - 1) & ~(blocksize - 1));
978 if (*endnum > (i + 2))
979 memmove(&laarr[i + 1], &laarr[i + 2],
980 sizeof(struct long_ad) *
981 (*endnum - (i + 2)));
985 } else if (((li->extLength >> 30) ==
986 (EXT_NOT_RECORDED_ALLOCATED >> 30)) &&
987 ((lip1->extLength >> 30) ==
988 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))) {
989 udf_free_blocks(inode->i_sb, inode, &li->extLocation, 0,
991 UDF_EXTENT_LENGTH_MASK) +
992 blocksize - 1) >> blocksize_bits);
993 li->extLocation.logicalBlockNum = 0;
994 li->extLocation.partitionReferenceNum = 0;
996 if (((li->extLength & UDF_EXTENT_LENGTH_MASK) +
997 (lip1->extLength & UDF_EXTENT_LENGTH_MASK) +
998 blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) {
999 lip1->extLength = (lip1->extLength -
1001 UDF_EXTENT_LENGTH_MASK) +
1002 UDF_EXTENT_LENGTH_MASK) &
1004 li->extLength = (li->extLength &
1005 UDF_EXTENT_FLAG_MASK) +
1006 (UDF_EXTENT_LENGTH_MASK + 1) -
1009 li->extLength = lip1->extLength +
1011 UDF_EXTENT_LENGTH_MASK) +
1012 blocksize - 1) & ~(blocksize - 1));
1013 if (*endnum > (i + 2))
1014 memmove(&laarr[i + 1], &laarr[i + 2],
1015 sizeof(struct long_ad) *
1016 (*endnum - (i + 2)));
1020 } else if ((li->extLength >> 30) ==
1021 (EXT_NOT_RECORDED_ALLOCATED >> 30)) {
1022 udf_free_blocks(inode->i_sb, inode,
1023 &li->extLocation, 0,
1025 UDF_EXTENT_LENGTH_MASK) +
1026 blocksize - 1) >> blocksize_bits);
1027 li->extLocation.logicalBlockNum = 0;
1028 li->extLocation.partitionReferenceNum = 0;
1029 li->extLength = (li->extLength &
1030 UDF_EXTENT_LENGTH_MASK) |
1031 EXT_NOT_RECORDED_NOT_ALLOCATED;
1036 static void udf_update_extents(struct inode *inode,
1037 struct kernel_long_ad laarr[EXTENT_MERGE_SIZE],
1038 int startnum, int endnum,
1039 struct extent_position *epos)
1042 struct kernel_lb_addr tmploc;
1045 if (startnum > endnum) {
1046 for (i = 0; i < (startnum - endnum); i++)
1047 udf_delete_aext(inode, *epos, laarr[i].extLocation,
1048 laarr[i].extLength);
1049 } else if (startnum < endnum) {
1050 for (i = 0; i < (endnum - startnum); i++) {
1051 udf_insert_aext(inode, *epos, laarr[i].extLocation,
1052 laarr[i].extLength);
1053 udf_next_aext(inode, epos, &laarr[i].extLocation,
1054 &laarr[i].extLength, 1);
1059 for (i = start; i < endnum; i++) {
1060 udf_next_aext(inode, epos, &tmploc, &tmplen, 0);
1061 udf_write_aext(inode, epos, &laarr[i].extLocation,
1062 laarr[i].extLength, 1);
1066 struct buffer_head *udf_bread(struct inode *inode, int block,
1067 int create, int *err)
1069 struct buffer_head *bh = NULL;
1071 bh = udf_getblk(inode, block, create, err);
1075 if (buffer_uptodate(bh))
1078 ll_rw_block(READ, 1, &bh);
1081 if (buffer_uptodate(bh))
1089 int udf_setsize(struct inode *inode, loff_t newsize)
1092 struct udf_inode_info *iinfo;
1093 int bsize = 1 << inode->i_blkbits;
1095 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
1096 S_ISLNK(inode->i_mode)))
1098 if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
1101 iinfo = UDF_I(inode);
1102 if (newsize > inode->i_size) {
1103 down_write(&iinfo->i_data_sem);
1104 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
1106 (udf_file_entry_alloc_offset(inode) + newsize)) {
1107 err = udf_expand_file_adinicb(inode);
1109 up_write(&iinfo->i_data_sem);
1113 iinfo->i_lenAlloc = newsize;
1115 err = udf_extend_file(inode, newsize);
1117 up_write(&iinfo->i_data_sem);
1120 truncate_setsize(inode, newsize);
1121 up_write(&iinfo->i_data_sem);
1123 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
1124 down_write(&iinfo->i_data_sem);
1125 memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr + newsize,
1126 0x00, bsize - newsize -
1127 udf_file_entry_alloc_offset(inode));
1128 iinfo->i_lenAlloc = newsize;
1129 truncate_setsize(inode, newsize);
1130 up_write(&iinfo->i_data_sem);
1133 err = block_truncate_page(inode->i_mapping, newsize,
1137 down_write(&iinfo->i_data_sem);
1138 truncate_setsize(inode, newsize);
1139 udf_truncate_extents(inode);
1140 up_write(&iinfo->i_data_sem);
1143 inode->i_mtime = inode->i_ctime = current_fs_time(inode->i_sb);
1145 udf_sync_inode(inode);
1147 mark_inode_dirty(inode);
1151 static void __udf_read_inode(struct inode *inode)
1153 struct buffer_head *bh = NULL;
1154 struct fileEntry *fe;
1156 struct udf_inode_info *iinfo = UDF_I(inode);
1159 * Set defaults, but the inode is still incomplete!
1160 * Note: get_new_inode() sets the following on a new inode:
1163 * i_flags = sb->s_flags
1165 * clean_inode(): zero fills and sets
1170 bh = udf_read_ptagged(inode->i_sb, &iinfo->i_location, 0, &ident);
1172 printk(KERN_ERR "udf: udf_read_inode(ino %ld) failed !bh\n",
1174 make_bad_inode(inode);
1178 if (ident != TAG_IDENT_FE && ident != TAG_IDENT_EFE &&
1179 ident != TAG_IDENT_USE) {
1180 printk(KERN_ERR "udf: udf_read_inode(ino %ld) "
1181 "failed ident=%d\n", inode->i_ino, ident);
1183 make_bad_inode(inode);
1187 fe = (struct fileEntry *)bh->b_data;
1189 if (fe->icbTag.strategyType == cpu_to_le16(4096)) {
1190 struct buffer_head *ibh;
1192 ibh = udf_read_ptagged(inode->i_sb, &iinfo->i_location, 1,
1194 if (ident == TAG_IDENT_IE && ibh) {
1195 struct buffer_head *nbh = NULL;
1196 struct kernel_lb_addr loc;
1197 struct indirectEntry *ie;
1199 ie = (struct indirectEntry *)ibh->b_data;
1200 loc = lelb_to_cpu(ie->indirectICB.extLocation);
1202 if (ie->indirectICB.extLength &&
1203 (nbh = udf_read_ptagged(inode->i_sb, &loc, 0,
1205 if (ident == TAG_IDENT_FE ||
1206 ident == TAG_IDENT_EFE) {
1207 memcpy(&iinfo->i_location,
1209 sizeof(struct kernel_lb_addr));
1213 __udf_read_inode(inode);
1220 } else if (fe->icbTag.strategyType != cpu_to_le16(4)) {
1221 printk(KERN_ERR "udf: unsupported strategy type: %d\n",
1222 le16_to_cpu(fe->icbTag.strategyType));
1224 make_bad_inode(inode);
1227 udf_fill_inode(inode, bh);
1232 static void udf_fill_inode(struct inode *inode, struct buffer_head *bh)
1234 struct fileEntry *fe;
1235 struct extendedFileEntry *efe;
1237 struct udf_sb_info *sbi = UDF_SB(inode->i_sb);
1238 struct udf_inode_info *iinfo = UDF_I(inode);
1239 unsigned int link_count;
1241 fe = (struct fileEntry *)bh->b_data;
1242 efe = (struct extendedFileEntry *)bh->b_data;
1244 if (fe->icbTag.strategyType == cpu_to_le16(4))
1245 iinfo->i_strat4096 = 0;
1246 else /* if (fe->icbTag.strategyType == cpu_to_le16(4096)) */
1247 iinfo->i_strat4096 = 1;
1249 iinfo->i_alloc_type = le16_to_cpu(fe->icbTag.flags) &
1250 ICBTAG_FLAG_AD_MASK;
1251 iinfo->i_unique = 0;
1252 iinfo->i_lenEAttr = 0;
1253 iinfo->i_lenExtents = 0;
1254 iinfo->i_lenAlloc = 0;
1255 iinfo->i_next_alloc_block = 0;
1256 iinfo->i_next_alloc_goal = 0;
1257 if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_EFE)) {
1260 if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize -
1261 sizeof(struct extendedFileEntry))) {
1262 make_bad_inode(inode);
1265 memcpy(iinfo->i_ext.i_data,
1266 bh->b_data + sizeof(struct extendedFileEntry),
1267 inode->i_sb->s_blocksize -
1268 sizeof(struct extendedFileEntry));
1269 } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_FE)) {
1272 if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize -
1273 sizeof(struct fileEntry))) {
1274 make_bad_inode(inode);
1277 memcpy(iinfo->i_ext.i_data,
1278 bh->b_data + sizeof(struct fileEntry),
1279 inode->i_sb->s_blocksize - sizeof(struct fileEntry));
1280 } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_USE)) {
1283 iinfo->i_lenAlloc = le32_to_cpu(
1284 ((struct unallocSpaceEntry *)bh->b_data)->
1286 if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize -
1287 sizeof(struct unallocSpaceEntry))) {
1288 make_bad_inode(inode);
1291 memcpy(iinfo->i_ext.i_data,
1292 bh->b_data + sizeof(struct unallocSpaceEntry),
1293 inode->i_sb->s_blocksize -
1294 sizeof(struct unallocSpaceEntry));
1298 read_lock(&sbi->s_cred_lock);
1299 inode->i_uid = le32_to_cpu(fe->uid);
1300 if (inode->i_uid == -1 ||
1301 UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_IGNORE) ||
1302 UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_SET))
1303 inode->i_uid = UDF_SB(inode->i_sb)->s_uid;
1305 inode->i_gid = le32_to_cpu(fe->gid);
1306 if (inode->i_gid == -1 ||
1307 UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_IGNORE) ||
1308 UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_SET))
1309 inode->i_gid = UDF_SB(inode->i_sb)->s_gid;
1311 if (fe->icbTag.fileType != ICBTAG_FILE_TYPE_DIRECTORY &&
1312 sbi->s_fmode != UDF_INVALID_MODE)
1313 inode->i_mode = sbi->s_fmode;
1314 else if (fe->icbTag.fileType == ICBTAG_FILE_TYPE_DIRECTORY &&
1315 sbi->s_dmode != UDF_INVALID_MODE)
1316 inode->i_mode = sbi->s_dmode;
1318 inode->i_mode = udf_convert_permissions(fe);
1319 inode->i_mode &= ~sbi->s_umask;
1320 read_unlock(&sbi->s_cred_lock);
1322 link_count = le16_to_cpu(fe->fileLinkCount);
1325 set_nlink(inode, link_count);
1327 inode->i_size = le64_to_cpu(fe->informationLength);
1328 iinfo->i_lenExtents = inode->i_size;
1330 if (iinfo->i_efe == 0) {
1331 inode->i_blocks = le64_to_cpu(fe->logicalBlocksRecorded) <<
1332 (inode->i_sb->s_blocksize_bits - 9);
1334 if (!udf_disk_stamp_to_time(&inode->i_atime, fe->accessTime))
1335 inode->i_atime = sbi->s_record_time;
1337 if (!udf_disk_stamp_to_time(&inode->i_mtime,
1338 fe->modificationTime))
1339 inode->i_mtime = sbi->s_record_time;
1341 if (!udf_disk_stamp_to_time(&inode->i_ctime, fe->attrTime))
1342 inode->i_ctime = sbi->s_record_time;
1344 iinfo->i_unique = le64_to_cpu(fe->uniqueID);
1345 iinfo->i_lenEAttr = le32_to_cpu(fe->lengthExtendedAttr);
1346 iinfo->i_lenAlloc = le32_to_cpu(fe->lengthAllocDescs);
1347 offset = sizeof(struct fileEntry) + iinfo->i_lenEAttr;
1349 inode->i_blocks = le64_to_cpu(efe->logicalBlocksRecorded) <<
1350 (inode->i_sb->s_blocksize_bits - 9);
1352 if (!udf_disk_stamp_to_time(&inode->i_atime, efe->accessTime))
1353 inode->i_atime = sbi->s_record_time;
1355 if (!udf_disk_stamp_to_time(&inode->i_mtime,
1356 efe->modificationTime))
1357 inode->i_mtime = sbi->s_record_time;
1359 if (!udf_disk_stamp_to_time(&iinfo->i_crtime, efe->createTime))
1360 iinfo->i_crtime = sbi->s_record_time;
1362 if (!udf_disk_stamp_to_time(&inode->i_ctime, efe->attrTime))
1363 inode->i_ctime = sbi->s_record_time;
1365 iinfo->i_unique = le64_to_cpu(efe->uniqueID);
1366 iinfo->i_lenEAttr = le32_to_cpu(efe->lengthExtendedAttr);
1367 iinfo->i_lenAlloc = le32_to_cpu(efe->lengthAllocDescs);
1368 offset = sizeof(struct extendedFileEntry) +
1372 switch (fe->icbTag.fileType) {
1373 case ICBTAG_FILE_TYPE_DIRECTORY:
1374 inode->i_op = &udf_dir_inode_operations;
1375 inode->i_fop = &udf_dir_operations;
1376 inode->i_mode |= S_IFDIR;
1379 case ICBTAG_FILE_TYPE_REALTIME:
1380 case ICBTAG_FILE_TYPE_REGULAR:
1381 case ICBTAG_FILE_TYPE_UNDEF:
1382 case ICBTAG_FILE_TYPE_VAT20:
1383 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
1384 inode->i_data.a_ops = &udf_adinicb_aops;
1386 inode->i_data.a_ops = &udf_aops;
1387 inode->i_op = &udf_file_inode_operations;
1388 inode->i_fop = &udf_file_operations;
1389 inode->i_mode |= S_IFREG;
1391 case ICBTAG_FILE_TYPE_BLOCK:
1392 inode->i_mode |= S_IFBLK;
1394 case ICBTAG_FILE_TYPE_CHAR:
1395 inode->i_mode |= S_IFCHR;
1397 case ICBTAG_FILE_TYPE_FIFO:
1398 init_special_inode(inode, inode->i_mode | S_IFIFO, 0);
1400 case ICBTAG_FILE_TYPE_SOCKET:
1401 init_special_inode(inode, inode->i_mode | S_IFSOCK, 0);
1403 case ICBTAG_FILE_TYPE_SYMLINK:
1404 inode->i_data.a_ops = &udf_symlink_aops;
1405 inode->i_op = &udf_symlink_inode_operations;
1406 inode->i_mode = S_IFLNK | S_IRWXUGO;
1408 case ICBTAG_FILE_TYPE_MAIN:
1409 udf_debug("METADATA FILE-----\n");
1411 case ICBTAG_FILE_TYPE_MIRROR:
1412 udf_debug("METADATA MIRROR FILE-----\n");
1414 case ICBTAG_FILE_TYPE_BITMAP:
1415 udf_debug("METADATA BITMAP FILE-----\n");
1418 printk(KERN_ERR "udf: udf_fill_inode(ino %ld) failed unknown "
1419 "file type=%d\n", inode->i_ino,
1420 fe->icbTag.fileType);
1421 make_bad_inode(inode);
1424 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
1425 struct deviceSpec *dsea =
1426 (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1);
1428 init_special_inode(inode, inode->i_mode,
1429 MKDEV(le32_to_cpu(dsea->majorDeviceIdent),
1430 le32_to_cpu(dsea->minorDeviceIdent)));
1431 /* Developer ID ??? */
1433 make_bad_inode(inode);
1437 static int udf_alloc_i_data(struct inode *inode, size_t size)
1439 struct udf_inode_info *iinfo = UDF_I(inode);
1440 iinfo->i_ext.i_data = kmalloc(size, GFP_KERNEL);
1442 if (!iinfo->i_ext.i_data) {
1443 printk(KERN_ERR "udf:udf_alloc_i_data (ino %ld) "
1444 "no free memory\n", inode->i_ino);
1451 static mode_t udf_convert_permissions(struct fileEntry *fe)
1454 uint32_t permissions;
1457 permissions = le32_to_cpu(fe->permissions);
1458 flags = le16_to_cpu(fe->icbTag.flags);
1460 mode = ((permissions) & S_IRWXO) |
1461 ((permissions >> 2) & S_IRWXG) |
1462 ((permissions >> 4) & S_IRWXU) |
1463 ((flags & ICBTAG_FLAG_SETUID) ? S_ISUID : 0) |
1464 ((flags & ICBTAG_FLAG_SETGID) ? S_ISGID : 0) |
1465 ((flags & ICBTAG_FLAG_STICKY) ? S_ISVTX : 0);
1470 int udf_write_inode(struct inode *inode, struct writeback_control *wbc)
1472 return udf_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL);
1475 static int udf_sync_inode(struct inode *inode)
1477 return udf_update_inode(inode, 1);
1480 static int udf_update_inode(struct inode *inode, int do_sync)
1482 struct buffer_head *bh = NULL;
1483 struct fileEntry *fe;
1484 struct extendedFileEntry *efe;
1489 struct udf_sb_info *sbi = UDF_SB(inode->i_sb);
1490 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits;
1491 struct udf_inode_info *iinfo = UDF_I(inode);
1493 bh = udf_tgetblk(inode->i_sb,
1494 udf_get_lb_pblock(inode->i_sb, &iinfo->i_location, 0));
1496 udf_debug("getblk failure\n");
1501 memset(bh->b_data, 0, inode->i_sb->s_blocksize);
1502 fe = (struct fileEntry *)bh->b_data;
1503 efe = (struct extendedFileEntry *)bh->b_data;
1506 struct unallocSpaceEntry *use =
1507 (struct unallocSpaceEntry *)bh->b_data;
1509 use->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc);
1510 memcpy(bh->b_data + sizeof(struct unallocSpaceEntry),
1511 iinfo->i_ext.i_data, inode->i_sb->s_blocksize -
1512 sizeof(struct unallocSpaceEntry));
1513 use->descTag.tagIdent = cpu_to_le16(TAG_IDENT_USE);
1514 use->descTag.tagLocation =
1515 cpu_to_le32(iinfo->i_location.logicalBlockNum);
1516 crclen = sizeof(struct unallocSpaceEntry) +
1517 iinfo->i_lenAlloc - sizeof(struct tag);
1518 use->descTag.descCRCLength = cpu_to_le16(crclen);
1519 use->descTag.descCRC = cpu_to_le16(crc_itu_t(0, (char *)use +
1522 use->descTag.tagChecksum = udf_tag_checksum(&use->descTag);
1527 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_FORGET))
1528 fe->uid = cpu_to_le32(-1);
1530 fe->uid = cpu_to_le32(inode->i_uid);
1532 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_FORGET))
1533 fe->gid = cpu_to_le32(-1);
1535 fe->gid = cpu_to_le32(inode->i_gid);
1537 udfperms = ((inode->i_mode & S_IRWXO)) |
1538 ((inode->i_mode & S_IRWXG) << 2) |
1539 ((inode->i_mode & S_IRWXU) << 4);
1541 udfperms |= (le32_to_cpu(fe->permissions) &
1542 (FE_PERM_O_DELETE | FE_PERM_O_CHATTR |
1543 FE_PERM_G_DELETE | FE_PERM_G_CHATTR |
1544 FE_PERM_U_DELETE | FE_PERM_U_CHATTR));
1545 fe->permissions = cpu_to_le32(udfperms);
1547 if (S_ISDIR(inode->i_mode))
1548 fe->fileLinkCount = cpu_to_le16(inode->i_nlink - 1);
1550 fe->fileLinkCount = cpu_to_le16(inode->i_nlink);
1552 fe->informationLength = cpu_to_le64(inode->i_size);
1554 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
1556 struct deviceSpec *dsea =
1557 (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1);
1559 dsea = (struct deviceSpec *)
1560 udf_add_extendedattr(inode,
1561 sizeof(struct deviceSpec) +
1562 sizeof(struct regid), 12, 0x3);
1563 dsea->attrType = cpu_to_le32(12);
1564 dsea->attrSubtype = 1;
1565 dsea->attrLength = cpu_to_le32(
1566 sizeof(struct deviceSpec) +
1567 sizeof(struct regid));
1568 dsea->impUseLength = cpu_to_le32(sizeof(struct regid));
1570 eid = (struct regid *)dsea->impUse;
1571 memset(eid, 0, sizeof(struct regid));
1572 strcpy(eid->ident, UDF_ID_DEVELOPER);
1573 eid->identSuffix[0] = UDF_OS_CLASS_UNIX;
1574 eid->identSuffix[1] = UDF_OS_ID_LINUX;
1575 dsea->majorDeviceIdent = cpu_to_le32(imajor(inode));
1576 dsea->minorDeviceIdent = cpu_to_le32(iminor(inode));
1579 if (iinfo->i_efe == 0) {
1580 memcpy(bh->b_data + sizeof(struct fileEntry),
1581 iinfo->i_ext.i_data,
1582 inode->i_sb->s_blocksize - sizeof(struct fileEntry));
1583 fe->logicalBlocksRecorded = cpu_to_le64(
1584 (inode->i_blocks + (1 << (blocksize_bits - 9)) - 1) >>
1585 (blocksize_bits - 9));
1587 udf_time_to_disk_stamp(&fe->accessTime, inode->i_atime);
1588 udf_time_to_disk_stamp(&fe->modificationTime, inode->i_mtime);
1589 udf_time_to_disk_stamp(&fe->attrTime, inode->i_ctime);
1590 memset(&(fe->impIdent), 0, sizeof(struct regid));
1591 strcpy(fe->impIdent.ident, UDF_ID_DEVELOPER);
1592 fe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1593 fe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1594 fe->uniqueID = cpu_to_le64(iinfo->i_unique);
1595 fe->lengthExtendedAttr = cpu_to_le32(iinfo->i_lenEAttr);
1596 fe->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc);
1597 fe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_FE);
1598 crclen = sizeof(struct fileEntry);
1600 memcpy(bh->b_data + sizeof(struct extendedFileEntry),
1601 iinfo->i_ext.i_data,
1602 inode->i_sb->s_blocksize -
1603 sizeof(struct extendedFileEntry));
1604 efe->objectSize = cpu_to_le64(inode->i_size);
1605 efe->logicalBlocksRecorded = cpu_to_le64(
1606 (inode->i_blocks + (1 << (blocksize_bits - 9)) - 1) >>
1607 (blocksize_bits - 9));
1609 if (iinfo->i_crtime.tv_sec > inode->i_atime.tv_sec ||
1610 (iinfo->i_crtime.tv_sec == inode->i_atime.tv_sec &&
1611 iinfo->i_crtime.tv_nsec > inode->i_atime.tv_nsec))
1612 iinfo->i_crtime = inode->i_atime;
1614 if (iinfo->i_crtime.tv_sec > inode->i_mtime.tv_sec ||
1615 (iinfo->i_crtime.tv_sec == inode->i_mtime.tv_sec &&
1616 iinfo->i_crtime.tv_nsec > inode->i_mtime.tv_nsec))
1617 iinfo->i_crtime = inode->i_mtime;
1619 if (iinfo->i_crtime.tv_sec > inode->i_ctime.tv_sec ||
1620 (iinfo->i_crtime.tv_sec == inode->i_ctime.tv_sec &&
1621 iinfo->i_crtime.tv_nsec > inode->i_ctime.tv_nsec))
1622 iinfo->i_crtime = inode->i_ctime;
1624 udf_time_to_disk_stamp(&efe->accessTime, inode->i_atime);
1625 udf_time_to_disk_stamp(&efe->modificationTime, inode->i_mtime);
1626 udf_time_to_disk_stamp(&efe->createTime, iinfo->i_crtime);
1627 udf_time_to_disk_stamp(&efe->attrTime, inode->i_ctime);
1629 memset(&(efe->impIdent), 0, sizeof(struct regid));
1630 strcpy(efe->impIdent.ident, UDF_ID_DEVELOPER);
1631 efe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1632 efe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1633 efe->uniqueID = cpu_to_le64(iinfo->i_unique);
1634 efe->lengthExtendedAttr = cpu_to_le32(iinfo->i_lenEAttr);
1635 efe->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc);
1636 efe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_EFE);
1637 crclen = sizeof(struct extendedFileEntry);
1639 if (iinfo->i_strat4096) {
1640 fe->icbTag.strategyType = cpu_to_le16(4096);
1641 fe->icbTag.strategyParameter = cpu_to_le16(1);
1642 fe->icbTag.numEntries = cpu_to_le16(2);
1644 fe->icbTag.strategyType = cpu_to_le16(4);
1645 fe->icbTag.numEntries = cpu_to_le16(1);
1648 if (S_ISDIR(inode->i_mode))
1649 fe->icbTag.fileType = ICBTAG_FILE_TYPE_DIRECTORY;
1650 else if (S_ISREG(inode->i_mode))
1651 fe->icbTag.fileType = ICBTAG_FILE_TYPE_REGULAR;
1652 else if (S_ISLNK(inode->i_mode))
1653 fe->icbTag.fileType = ICBTAG_FILE_TYPE_SYMLINK;
1654 else if (S_ISBLK(inode->i_mode))
1655 fe->icbTag.fileType = ICBTAG_FILE_TYPE_BLOCK;
1656 else if (S_ISCHR(inode->i_mode))
1657 fe->icbTag.fileType = ICBTAG_FILE_TYPE_CHAR;
1658 else if (S_ISFIFO(inode->i_mode))
1659 fe->icbTag.fileType = ICBTAG_FILE_TYPE_FIFO;
1660 else if (S_ISSOCK(inode->i_mode))
1661 fe->icbTag.fileType = ICBTAG_FILE_TYPE_SOCKET;
1663 icbflags = iinfo->i_alloc_type |
1664 ((inode->i_mode & S_ISUID) ? ICBTAG_FLAG_SETUID : 0) |
1665 ((inode->i_mode & S_ISGID) ? ICBTAG_FLAG_SETGID : 0) |
1666 ((inode->i_mode & S_ISVTX) ? ICBTAG_FLAG_STICKY : 0) |
1667 (le16_to_cpu(fe->icbTag.flags) &
1668 ~(ICBTAG_FLAG_AD_MASK | ICBTAG_FLAG_SETUID |
1669 ICBTAG_FLAG_SETGID | ICBTAG_FLAG_STICKY));
1671 fe->icbTag.flags = cpu_to_le16(icbflags);
1672 if (sbi->s_udfrev >= 0x0200)
1673 fe->descTag.descVersion = cpu_to_le16(3);
1675 fe->descTag.descVersion = cpu_to_le16(2);
1676 fe->descTag.tagSerialNum = cpu_to_le16(sbi->s_serial_number);
1677 fe->descTag.tagLocation = cpu_to_le32(
1678 iinfo->i_location.logicalBlockNum);
1679 crclen += iinfo->i_lenEAttr + iinfo->i_lenAlloc - sizeof(struct tag);
1680 fe->descTag.descCRCLength = cpu_to_le16(crclen);
1681 fe->descTag.descCRC = cpu_to_le16(crc_itu_t(0, (char *)fe + sizeof(struct tag),
1683 fe->descTag.tagChecksum = udf_tag_checksum(&fe->descTag);
1686 set_buffer_uptodate(bh);
1689 /* write the data blocks */
1690 mark_buffer_dirty(bh);
1692 sync_dirty_buffer(bh);
1693 if (buffer_write_io_error(bh)) {
1694 printk(KERN_WARNING "IO error syncing udf inode "
1695 "[%s:%08lx]\n", inode->i_sb->s_id,
1705 struct inode *udf_iget(struct super_block *sb, struct kernel_lb_addr *ino)
1707 unsigned long block = udf_get_lb_pblock(sb, ino, 0);
1708 struct inode *inode = iget_locked(sb, block);
1713 if (inode->i_state & I_NEW) {
1714 memcpy(&UDF_I(inode)->i_location, ino, sizeof(struct kernel_lb_addr));
1715 __udf_read_inode(inode);
1716 unlock_new_inode(inode);
1719 if (is_bad_inode(inode))
1722 if (ino->logicalBlockNum >= UDF_SB(sb)->
1723 s_partmaps[ino->partitionReferenceNum].s_partition_len) {
1724 udf_debug("block=%d, partition=%d out of range\n",
1725 ino->logicalBlockNum, ino->partitionReferenceNum);
1726 make_bad_inode(inode);
1737 int udf_add_aext(struct inode *inode, struct extent_position *epos,
1738 struct kernel_lb_addr *eloc, uint32_t elen, int inc)
1741 struct short_ad *sad = NULL;
1742 struct long_ad *lad = NULL;
1743 struct allocExtDesc *aed;
1745 struct udf_inode_info *iinfo = UDF_I(inode);
1748 ptr = iinfo->i_ext.i_data + epos->offset -
1749 udf_file_entry_alloc_offset(inode) +
1752 ptr = epos->bh->b_data + epos->offset;
1754 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
1755 adsize = sizeof(struct short_ad);
1756 else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
1757 adsize = sizeof(struct long_ad);
1761 if (epos->offset + (2 * adsize) > inode->i_sb->s_blocksize) {
1762 unsigned char *sptr, *dptr;
1763 struct buffer_head *nbh;
1765 struct kernel_lb_addr obloc = epos->block;
1767 epos->block.logicalBlockNum = udf_new_block(inode->i_sb, NULL,
1768 obloc.partitionReferenceNum,
1769 obloc.logicalBlockNum, &err);
1770 if (!epos->block.logicalBlockNum)
1772 nbh = udf_tgetblk(inode->i_sb, udf_get_lb_pblock(inode->i_sb,
1778 memset(nbh->b_data, 0x00, inode->i_sb->s_blocksize);
1779 set_buffer_uptodate(nbh);
1781 mark_buffer_dirty_inode(nbh, inode);
1783 aed = (struct allocExtDesc *)(nbh->b_data);
1784 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT))
1785 aed->previousAllocExtLocation =
1786 cpu_to_le32(obloc.logicalBlockNum);
1787 if (epos->offset + adsize > inode->i_sb->s_blocksize) {
1788 loffset = epos->offset;
1789 aed->lengthAllocDescs = cpu_to_le32(adsize);
1790 sptr = ptr - adsize;
1791 dptr = nbh->b_data + sizeof(struct allocExtDesc);
1792 memcpy(dptr, sptr, adsize);
1793 epos->offset = sizeof(struct allocExtDesc) + adsize;
1795 loffset = epos->offset + adsize;
1796 aed->lengthAllocDescs = cpu_to_le32(0);
1798 epos->offset = sizeof(struct allocExtDesc);
1801 aed = (struct allocExtDesc *)epos->bh->b_data;
1802 le32_add_cpu(&aed->lengthAllocDescs, adsize);
1804 iinfo->i_lenAlloc += adsize;
1805 mark_inode_dirty(inode);
1808 if (UDF_SB(inode->i_sb)->s_udfrev >= 0x0200)
1809 udf_new_tag(nbh->b_data, TAG_IDENT_AED, 3, 1,
1810 epos->block.logicalBlockNum, sizeof(struct tag));
1812 udf_new_tag(nbh->b_data, TAG_IDENT_AED, 2, 1,
1813 epos->block.logicalBlockNum, sizeof(struct tag));
1814 switch (iinfo->i_alloc_type) {
1815 case ICBTAG_FLAG_AD_SHORT:
1816 sad = (struct short_ad *)sptr;
1817 sad->extLength = cpu_to_le32(EXT_NEXT_EXTENT_ALLOCDECS |
1818 inode->i_sb->s_blocksize);
1820 cpu_to_le32(epos->block.logicalBlockNum);
1822 case ICBTAG_FLAG_AD_LONG:
1823 lad = (struct long_ad *)sptr;
1824 lad->extLength = cpu_to_le32(EXT_NEXT_EXTENT_ALLOCDECS |
1825 inode->i_sb->s_blocksize);
1826 lad->extLocation = cpu_to_lelb(epos->block);
1827 memset(lad->impUse, 0x00, sizeof(lad->impUse));
1831 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
1832 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201)
1833 udf_update_tag(epos->bh->b_data, loffset);
1835 udf_update_tag(epos->bh->b_data,
1836 sizeof(struct allocExtDesc));
1837 mark_buffer_dirty_inode(epos->bh, inode);
1840 mark_inode_dirty(inode);
1845 udf_write_aext(inode, epos, eloc, elen, inc);
1848 iinfo->i_lenAlloc += adsize;
1849 mark_inode_dirty(inode);
1851 aed = (struct allocExtDesc *)epos->bh->b_data;
1852 le32_add_cpu(&aed->lengthAllocDescs, adsize);
1853 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
1854 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201)
1855 udf_update_tag(epos->bh->b_data,
1856 epos->offset + (inc ? 0 : adsize));
1858 udf_update_tag(epos->bh->b_data,
1859 sizeof(struct allocExtDesc));
1860 mark_buffer_dirty_inode(epos->bh, inode);
1866 void udf_write_aext(struct inode *inode, struct extent_position *epos,
1867 struct kernel_lb_addr *eloc, uint32_t elen, int inc)
1871 struct short_ad *sad;
1872 struct long_ad *lad;
1873 struct udf_inode_info *iinfo = UDF_I(inode);
1876 ptr = iinfo->i_ext.i_data + epos->offset -
1877 udf_file_entry_alloc_offset(inode) +
1880 ptr = epos->bh->b_data + epos->offset;
1882 switch (iinfo->i_alloc_type) {
1883 case ICBTAG_FLAG_AD_SHORT:
1884 sad = (struct short_ad *)ptr;
1885 sad->extLength = cpu_to_le32(elen);
1886 sad->extPosition = cpu_to_le32(eloc->logicalBlockNum);
1887 adsize = sizeof(struct short_ad);
1889 case ICBTAG_FLAG_AD_LONG:
1890 lad = (struct long_ad *)ptr;
1891 lad->extLength = cpu_to_le32(elen);
1892 lad->extLocation = cpu_to_lelb(*eloc);
1893 memset(lad->impUse, 0x00, sizeof(lad->impUse));
1894 adsize = sizeof(struct long_ad);
1901 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
1902 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) {
1903 struct allocExtDesc *aed =
1904 (struct allocExtDesc *)epos->bh->b_data;
1905 udf_update_tag(epos->bh->b_data,
1906 le32_to_cpu(aed->lengthAllocDescs) +
1907 sizeof(struct allocExtDesc));
1909 mark_buffer_dirty_inode(epos->bh, inode);
1911 mark_inode_dirty(inode);
1915 epos->offset += adsize;
1918 int8_t udf_next_aext(struct inode *inode, struct extent_position *epos,
1919 struct kernel_lb_addr *eloc, uint32_t *elen, int inc)
1923 while ((etype = udf_current_aext(inode, epos, eloc, elen, inc)) ==
1924 (EXT_NEXT_EXTENT_ALLOCDECS >> 30)) {
1926 epos->block = *eloc;
1927 epos->offset = sizeof(struct allocExtDesc);
1929 block = udf_get_lb_pblock(inode->i_sb, &epos->block, 0);
1930 epos->bh = udf_tread(inode->i_sb, block);
1932 udf_debug("reading block %d failed!\n", block);
1940 int8_t udf_current_aext(struct inode *inode, struct extent_position *epos,
1941 struct kernel_lb_addr *eloc, uint32_t *elen, int inc)
1946 struct short_ad *sad;
1947 struct long_ad *lad;
1948 struct udf_inode_info *iinfo = UDF_I(inode);
1952 epos->offset = udf_file_entry_alloc_offset(inode);
1953 ptr = iinfo->i_ext.i_data + epos->offset -
1954 udf_file_entry_alloc_offset(inode) +
1956 alen = udf_file_entry_alloc_offset(inode) +
1960 epos->offset = sizeof(struct allocExtDesc);
1961 ptr = epos->bh->b_data + epos->offset;
1962 alen = sizeof(struct allocExtDesc) +
1963 le32_to_cpu(((struct allocExtDesc *)epos->bh->b_data)->
1967 switch (iinfo->i_alloc_type) {
1968 case ICBTAG_FLAG_AD_SHORT:
1969 sad = udf_get_fileshortad(ptr, alen, &epos->offset, inc);
1972 etype = le32_to_cpu(sad->extLength) >> 30;
1973 eloc->logicalBlockNum = le32_to_cpu(sad->extPosition);
1974 eloc->partitionReferenceNum =
1975 iinfo->i_location.partitionReferenceNum;
1976 *elen = le32_to_cpu(sad->extLength) & UDF_EXTENT_LENGTH_MASK;
1978 case ICBTAG_FLAG_AD_LONG:
1979 lad = udf_get_filelongad(ptr, alen, &epos->offset, inc);
1982 etype = le32_to_cpu(lad->extLength) >> 30;
1983 *eloc = lelb_to_cpu(lad->extLocation);
1984 *elen = le32_to_cpu(lad->extLength) & UDF_EXTENT_LENGTH_MASK;
1987 udf_debug("alloc_type = %d unsupported\n",
1988 iinfo->i_alloc_type);
1995 static int8_t udf_insert_aext(struct inode *inode, struct extent_position epos,
1996 struct kernel_lb_addr neloc, uint32_t nelen)
1998 struct kernel_lb_addr oeloc;
2005 while ((etype = udf_next_aext(inode, &epos, &oeloc, &oelen, 0)) != -1) {
2006 udf_write_aext(inode, &epos, &neloc, nelen, 1);
2008 nelen = (etype << 30) | oelen;
2010 udf_add_aext(inode, &epos, &neloc, nelen, 1);
2013 return (nelen >> 30);
2016 int8_t udf_delete_aext(struct inode *inode, struct extent_position epos,
2017 struct kernel_lb_addr eloc, uint32_t elen)
2019 struct extent_position oepos;
2022 struct allocExtDesc *aed;
2023 struct udf_inode_info *iinfo;
2030 iinfo = UDF_I(inode);
2031 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
2032 adsize = sizeof(struct short_ad);
2033 else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
2034 adsize = sizeof(struct long_ad);
2039 if (udf_next_aext(inode, &epos, &eloc, &elen, 1) == -1)
2042 while ((etype = udf_next_aext(inode, &epos, &eloc, &elen, 1)) != -1) {
2043 udf_write_aext(inode, &oepos, &eloc, (etype << 30) | elen, 1);
2044 if (oepos.bh != epos.bh) {
2045 oepos.block = epos.block;
2049 oepos.offset = epos.offset - adsize;
2052 memset(&eloc, 0x00, sizeof(struct kernel_lb_addr));
2055 if (epos.bh != oepos.bh) {
2056 udf_free_blocks(inode->i_sb, inode, &epos.block, 0, 1);
2057 udf_write_aext(inode, &oepos, &eloc, elen, 1);
2058 udf_write_aext(inode, &oepos, &eloc, elen, 1);
2060 iinfo->i_lenAlloc -= (adsize * 2);
2061 mark_inode_dirty(inode);
2063 aed = (struct allocExtDesc *)oepos.bh->b_data;
2064 le32_add_cpu(&aed->lengthAllocDescs, -(2 * adsize));
2065 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
2066 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201)
2067 udf_update_tag(oepos.bh->b_data,
2068 oepos.offset - (2 * adsize));
2070 udf_update_tag(oepos.bh->b_data,
2071 sizeof(struct allocExtDesc));
2072 mark_buffer_dirty_inode(oepos.bh, inode);
2075 udf_write_aext(inode, &oepos, &eloc, elen, 1);
2077 iinfo->i_lenAlloc -= adsize;
2078 mark_inode_dirty(inode);
2080 aed = (struct allocExtDesc *)oepos.bh->b_data;
2081 le32_add_cpu(&aed->lengthAllocDescs, -adsize);
2082 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
2083 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201)
2084 udf_update_tag(oepos.bh->b_data,
2085 epos.offset - adsize);
2087 udf_update_tag(oepos.bh->b_data,
2088 sizeof(struct allocExtDesc));
2089 mark_buffer_dirty_inode(oepos.bh, inode);
2096 return (elen >> 30);
2099 int8_t inode_bmap(struct inode *inode, sector_t block,
2100 struct extent_position *pos, struct kernel_lb_addr *eloc,
2101 uint32_t *elen, sector_t *offset)
2103 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits;
2104 loff_t lbcount = 0, bcount =
2105 (loff_t) block << blocksize_bits;
2107 struct udf_inode_info *iinfo;
2109 iinfo = UDF_I(inode);
2111 pos->block = iinfo->i_location;
2116 etype = udf_next_aext(inode, pos, eloc, elen, 1);
2118 *offset = (bcount - lbcount) >> blocksize_bits;
2119 iinfo->i_lenExtents = lbcount;
2123 } while (lbcount <= bcount);
2125 *offset = (bcount + *elen - lbcount) >> blocksize_bits;
2130 long udf_block_map(struct inode *inode, sector_t block)
2132 struct kernel_lb_addr eloc;
2135 struct extent_position epos = {};
2138 down_read(&UDF_I(inode)->i_data_sem);
2140 if (inode_bmap(inode, block, &epos, &eloc, &elen, &offset) ==
2141 (EXT_RECORDED_ALLOCATED >> 30))
2142 ret = udf_get_lb_pblock(inode->i_sb, &eloc, offset);
2146 up_read(&UDF_I(inode)->i_data_sem);
2149 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_VARCONV))
2150 return udf_fixed_to_variable(ret);