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,
155 * Expand file stored in ICB to a normal one-block-file
157 * This function requires i_data_sem for writing and releases it.
158 * This function requires i_mutex held
160 int udf_expand_file_adinicb(struct inode *inode)
164 struct udf_inode_info *iinfo = UDF_I(inode);
166 struct writeback_control udf_wbc = {
167 .sync_mode = WB_SYNC_NONE,
171 if (!iinfo->i_lenAlloc) {
172 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))
173 iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT;
175 iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG;
176 /* from now on we have normal address_space methods */
177 inode->i_data.a_ops = &udf_aops;
178 up_write(&iinfo->i_data_sem);
179 mark_inode_dirty(inode);
183 * Release i_data_sem so that we can lock a page - page lock ranks
184 * above i_data_sem. i_mutex still protects us against file changes.
186 up_write(&iinfo->i_data_sem);
188 page = find_or_create_page(inode->i_mapping, 0, GFP_NOFS);
192 if (!PageUptodate(page)) {
194 memset(kaddr + iinfo->i_lenAlloc, 0x00,
195 PAGE_CACHE_SIZE - iinfo->i_lenAlloc);
196 memcpy(kaddr, iinfo->i_ext.i_data + iinfo->i_lenEAttr,
198 flush_dcache_page(page);
199 SetPageUptodate(page);
202 down_write(&iinfo->i_data_sem);
203 memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr, 0x00,
205 iinfo->i_lenAlloc = 0;
206 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))
207 iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT;
209 iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG;
210 /* from now on we have normal address_space methods */
211 inode->i_data.a_ops = &udf_aops;
212 up_write(&iinfo->i_data_sem);
213 err = inode->i_data.a_ops->writepage(page, &udf_wbc);
215 /* Restore everything back so that we don't lose data... */
218 down_write(&iinfo->i_data_sem);
219 memcpy(iinfo->i_ext.i_data + iinfo->i_lenEAttr, kaddr,
223 iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB;
224 inode->i_data.a_ops = &udf_adinicb_aops;
225 up_write(&iinfo->i_data_sem);
227 page_cache_release(page);
228 mark_inode_dirty(inode);
233 struct buffer_head *udf_expand_dir_adinicb(struct inode *inode, int *block,
237 struct buffer_head *dbh = NULL;
238 struct kernel_lb_addr eloc;
240 struct extent_position epos;
242 struct udf_fileident_bh sfibh, dfibh;
243 loff_t f_pos = udf_ext0_offset(inode);
244 int size = udf_ext0_offset(inode) + inode->i_size;
245 struct fileIdentDesc cfi, *sfi, *dfi;
246 struct udf_inode_info *iinfo = UDF_I(inode);
248 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))
249 alloctype = ICBTAG_FLAG_AD_SHORT;
251 alloctype = ICBTAG_FLAG_AD_LONG;
253 if (!inode->i_size) {
254 iinfo->i_alloc_type = alloctype;
255 mark_inode_dirty(inode);
259 /* alloc block, and copy data to it */
260 *block = udf_new_block(inode->i_sb, inode,
261 iinfo->i_location.partitionReferenceNum,
262 iinfo->i_location.logicalBlockNum, err);
265 newblock = udf_get_pblock(inode->i_sb, *block,
266 iinfo->i_location.partitionReferenceNum,
270 dbh = udf_tgetblk(inode->i_sb, newblock);
274 memset(dbh->b_data, 0x00, inode->i_sb->s_blocksize);
275 set_buffer_uptodate(dbh);
277 mark_buffer_dirty_inode(dbh, inode);
279 sfibh.soffset = sfibh.eoffset =
280 f_pos & (inode->i_sb->s_blocksize - 1);
281 sfibh.sbh = sfibh.ebh = NULL;
282 dfibh.soffset = dfibh.eoffset = 0;
283 dfibh.sbh = dfibh.ebh = dbh;
284 while (f_pos < size) {
285 iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB;
286 sfi = udf_fileident_read(inode, &f_pos, &sfibh, &cfi, NULL,
292 iinfo->i_alloc_type = alloctype;
293 sfi->descTag.tagLocation = cpu_to_le32(*block);
294 dfibh.soffset = dfibh.eoffset;
295 dfibh.eoffset += (sfibh.eoffset - sfibh.soffset);
296 dfi = (struct fileIdentDesc *)(dbh->b_data + dfibh.soffset);
297 if (udf_write_fi(inode, sfi, dfi, &dfibh, sfi->impUse,
299 le16_to_cpu(sfi->lengthOfImpUse))) {
300 iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB;
305 mark_buffer_dirty_inode(dbh, inode);
307 memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr, 0,
309 iinfo->i_lenAlloc = 0;
310 eloc.logicalBlockNum = *block;
311 eloc.partitionReferenceNum =
312 iinfo->i_location.partitionReferenceNum;
313 iinfo->i_lenExtents = inode->i_size;
315 epos.block = iinfo->i_location;
316 epos.offset = udf_file_entry_alloc_offset(inode);
317 udf_add_aext(inode, &epos, &eloc, inode->i_size, 0);
321 mark_inode_dirty(inode);
325 static int udf_get_block(struct inode *inode, sector_t block,
326 struct buffer_head *bh_result, int create)
329 struct buffer_head *bh;
331 struct udf_inode_info *iinfo;
334 phys = udf_block_map(inode, block);
336 map_bh(bh_result, inode->i_sb, phys);
343 iinfo = UDF_I(inode);
345 down_write(&iinfo->i_data_sem);
346 if (block == iinfo->i_next_alloc_block + 1) {
347 iinfo->i_next_alloc_block++;
348 iinfo->i_next_alloc_goal++;
353 bh = inode_getblk(inode, block, &err, &phys, &new);
360 set_buffer_new(bh_result);
361 map_bh(bh_result, inode->i_sb, phys);
364 up_write(&iinfo->i_data_sem);
368 static struct buffer_head *udf_getblk(struct inode *inode, long block,
369 int create, int *err)
371 struct buffer_head *bh;
372 struct buffer_head dummy;
375 dummy.b_blocknr = -1000;
376 *err = udf_get_block(inode, block, &dummy, create);
377 if (!*err && buffer_mapped(&dummy)) {
378 bh = sb_getblk(inode->i_sb, dummy.b_blocknr);
379 if (buffer_new(&dummy)) {
381 memset(bh->b_data, 0x00, inode->i_sb->s_blocksize);
382 set_buffer_uptodate(bh);
384 mark_buffer_dirty_inode(bh, inode);
392 /* Extend the file by 'blocks' blocks, return the number of extents added */
393 static int udf_do_extend_file(struct inode *inode,
394 struct extent_position *last_pos,
395 struct kernel_long_ad *last_ext,
399 int count = 0, fake = !(last_ext->extLength & UDF_EXTENT_LENGTH_MASK);
400 struct super_block *sb = inode->i_sb;
401 struct kernel_lb_addr prealloc_loc = {};
402 int prealloc_len = 0;
403 struct udf_inode_info *iinfo;
406 /* The previous extent is fake and we should not extend by anything
407 * - there's nothing to do... */
411 iinfo = UDF_I(inode);
412 /* Round the last extent up to a multiple of block size */
413 if (last_ext->extLength & (sb->s_blocksize - 1)) {
414 last_ext->extLength =
415 (last_ext->extLength & UDF_EXTENT_FLAG_MASK) |
416 (((last_ext->extLength & UDF_EXTENT_LENGTH_MASK) +
417 sb->s_blocksize - 1) & ~(sb->s_blocksize - 1));
418 iinfo->i_lenExtents =
419 (iinfo->i_lenExtents + sb->s_blocksize - 1) &
420 ~(sb->s_blocksize - 1);
423 /* Last extent are just preallocated blocks? */
424 if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) ==
425 EXT_NOT_RECORDED_ALLOCATED) {
426 /* Save the extent so that we can reattach it to the end */
427 prealloc_loc = last_ext->extLocation;
428 prealloc_len = last_ext->extLength;
429 /* Mark the extent as a hole */
430 last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED |
431 (last_ext->extLength & UDF_EXTENT_LENGTH_MASK);
432 last_ext->extLocation.logicalBlockNum = 0;
433 last_ext->extLocation.partitionReferenceNum = 0;
436 /* Can we merge with the previous extent? */
437 if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) ==
438 EXT_NOT_RECORDED_NOT_ALLOCATED) {
439 add = ((1 << 30) - sb->s_blocksize -
440 (last_ext->extLength & UDF_EXTENT_LENGTH_MASK)) >>
441 sb->s_blocksize_bits;
445 last_ext->extLength += add << sb->s_blocksize_bits;
449 udf_add_aext(inode, last_pos, &last_ext->extLocation,
450 last_ext->extLength, 1);
453 udf_write_aext(inode, last_pos, &last_ext->extLocation,
454 last_ext->extLength, 1);
456 /* Managed to do everything necessary? */
460 /* All further extents will be NOT_RECORDED_NOT_ALLOCATED */
461 last_ext->extLocation.logicalBlockNum = 0;
462 last_ext->extLocation.partitionReferenceNum = 0;
463 add = (1 << (30-sb->s_blocksize_bits)) - 1;
464 last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED |
465 (add << sb->s_blocksize_bits);
467 /* Create enough extents to cover the whole hole */
468 while (blocks > add) {
470 err = udf_add_aext(inode, last_pos, &last_ext->extLocation,
471 last_ext->extLength, 1);
477 last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED |
478 (blocks << sb->s_blocksize_bits);
479 err = udf_add_aext(inode, last_pos, &last_ext->extLocation,
480 last_ext->extLength, 1);
487 /* Do we have some preallocated blocks saved? */
489 err = udf_add_aext(inode, last_pos, &prealloc_loc,
493 last_ext->extLocation = prealloc_loc;
494 last_ext->extLength = prealloc_len;
498 /* last_pos should point to the last written extent... */
499 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
500 last_pos->offset -= sizeof(struct short_ad);
501 else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
502 last_pos->offset -= sizeof(struct long_ad);
509 static int udf_extend_file(struct inode *inode, loff_t newsize)
512 struct extent_position epos;
513 struct kernel_lb_addr eloc;
516 struct super_block *sb = inode->i_sb;
517 sector_t first_block = newsize >> sb->s_blocksize_bits, offset;
519 struct udf_inode_info *iinfo = UDF_I(inode);
520 struct kernel_long_ad extent;
523 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
524 adsize = sizeof(struct short_ad);
525 else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
526 adsize = sizeof(struct long_ad);
530 etype = inode_bmap(inode, first_block, &epos, &eloc, &elen, &offset);
532 /* File has extent covering the new size (could happen when extending
533 * inside a block)? */
536 if (newsize & (sb->s_blocksize - 1))
538 /* Extended file just to the boundary of the last file block? */
542 /* Truncate is extending the file by 'offset' blocks */
543 if ((!epos.bh && epos.offset == udf_file_entry_alloc_offset(inode)) ||
544 (epos.bh && epos.offset == sizeof(struct allocExtDesc))) {
545 /* File has no extents at all or has empty last
546 * indirect extent! Create a fake extent... */
547 extent.extLocation.logicalBlockNum = 0;
548 extent.extLocation.partitionReferenceNum = 0;
549 extent.extLength = EXT_NOT_RECORDED_NOT_ALLOCATED;
551 epos.offset -= adsize;
552 etype = udf_next_aext(inode, &epos, &extent.extLocation,
553 &extent.extLength, 0);
554 extent.extLength |= etype << 30;
556 err = udf_do_extend_file(inode, &epos, &extent, offset);
560 iinfo->i_lenExtents = newsize;
566 static struct buffer_head *inode_getblk(struct inode *inode, sector_t block,
567 int *err, sector_t *phys, int *new)
569 static sector_t last_block;
570 struct buffer_head *result = NULL;
571 struct kernel_long_ad laarr[EXTENT_MERGE_SIZE];
572 struct extent_position prev_epos, cur_epos, next_epos;
573 int count = 0, startnum = 0, endnum = 0;
574 uint32_t elen = 0, tmpelen;
575 struct kernel_lb_addr eloc, tmpeloc;
577 loff_t lbcount = 0, b_off = 0;
578 uint32_t newblocknum, newblock;
581 struct udf_inode_info *iinfo = UDF_I(inode);
582 int goal = 0, pgoal = iinfo->i_location.logicalBlockNum;
585 prev_epos.offset = udf_file_entry_alloc_offset(inode);
586 prev_epos.block = iinfo->i_location;
588 cur_epos = next_epos = prev_epos;
589 b_off = (loff_t)block << inode->i_sb->s_blocksize_bits;
591 /* find the extent which contains the block we are looking for.
592 alternate between laarr[0] and laarr[1] for locations of the
593 current extent, and the previous extent */
595 if (prev_epos.bh != cur_epos.bh) {
596 brelse(prev_epos.bh);
598 prev_epos.bh = cur_epos.bh;
600 if (cur_epos.bh != next_epos.bh) {
602 get_bh(next_epos.bh);
603 cur_epos.bh = next_epos.bh;
608 prev_epos.block = cur_epos.block;
609 cur_epos.block = next_epos.block;
611 prev_epos.offset = cur_epos.offset;
612 cur_epos.offset = next_epos.offset;
614 etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 1);
620 laarr[c].extLength = (etype << 30) | elen;
621 laarr[c].extLocation = eloc;
623 if (etype != (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))
624 pgoal = eloc.logicalBlockNum +
625 ((elen + inode->i_sb->s_blocksize - 1) >>
626 inode->i_sb->s_blocksize_bits);
629 } while (lbcount + elen <= b_off);
632 offset = b_off >> inode->i_sb->s_blocksize_bits;
634 * Move prev_epos and cur_epos into indirect extent if we are at
637 udf_next_aext(inode, &prev_epos, &tmpeloc, &tmpelen, 0);
638 udf_next_aext(inode, &cur_epos, &tmpeloc, &tmpelen, 0);
640 /* if the extent is allocated and recorded, return the block
641 if the extent is not a multiple of the blocksize, round up */
643 if (etype == (EXT_RECORDED_ALLOCATED >> 30)) {
644 if (elen & (inode->i_sb->s_blocksize - 1)) {
645 elen = EXT_RECORDED_ALLOCATED |
646 ((elen + inode->i_sb->s_blocksize - 1) &
647 ~(inode->i_sb->s_blocksize - 1));
648 udf_write_aext(inode, &cur_epos, &eloc, elen, 1);
650 brelse(prev_epos.bh);
652 brelse(next_epos.bh);
653 newblock = udf_get_lb_pblock(inode->i_sb, &eloc, offset);
659 /* Are we beyond EOF? */
668 /* Create a fake extent when there's not one */
669 memset(&laarr[0].extLocation, 0x00,
670 sizeof(struct kernel_lb_addr));
671 laarr[0].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED;
672 /* Will udf_do_extend_file() create real extent from
674 startnum = (offset > 0);
676 /* Create extents for the hole between EOF and offset */
677 ret = udf_do_extend_file(inode, &prev_epos, laarr, offset);
679 brelse(prev_epos.bh);
681 brelse(next_epos.bh);
688 /* We are not covered by a preallocated extent? */
689 if ((laarr[0].extLength & UDF_EXTENT_FLAG_MASK) !=
690 EXT_NOT_RECORDED_ALLOCATED) {
691 /* Is there any real extent? - otherwise we overwrite
695 laarr[c].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED |
696 inode->i_sb->s_blocksize;
697 memset(&laarr[c].extLocation, 0x00,
698 sizeof(struct kernel_lb_addr));
705 endnum = startnum = ((count > 2) ? 2 : count);
707 /* if the current extent is in position 0,
708 swap it with the previous */
709 if (!c && count != 1) {
716 /* if the current block is located in an extent,
717 read the next extent */
718 etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 0);
720 laarr[c + 1].extLength = (etype << 30) | elen;
721 laarr[c + 1].extLocation = eloc;
729 /* if the current extent is not recorded but allocated, get the
730 * block in the extent corresponding to the requested block */
731 if ((laarr[c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30))
732 newblocknum = laarr[c].extLocation.logicalBlockNum + offset;
733 else { /* otherwise, allocate a new block */
734 if (iinfo->i_next_alloc_block == block)
735 goal = iinfo->i_next_alloc_goal;
738 if (!(goal = pgoal)) /* XXX: what was intended here? */
739 goal = iinfo->i_location.logicalBlockNum + 1;
742 newblocknum = udf_new_block(inode->i_sb, inode,
743 iinfo->i_location.partitionReferenceNum,
746 brelse(prev_epos.bh);
748 brelse(next_epos.bh);
752 iinfo->i_lenExtents += inode->i_sb->s_blocksize;
755 /* if the extent the requsted block is located in contains multiple
756 * blocks, split the extent into at most three extents. blocks prior
757 * to requested block, requested block, and blocks after requested
759 udf_split_extents(inode, &c, offset, newblocknum, laarr, &endnum);
761 #ifdef UDF_PREALLOCATE
762 /* We preallocate blocks only for regular files. It also makes sense
763 * for directories but there's a problem when to drop the
764 * preallocation. We might use some delayed work for that but I feel
765 * it's overengineering for a filesystem like UDF. */
766 if (S_ISREG(inode->i_mode))
767 udf_prealloc_extents(inode, c, lastblock, laarr, &endnum);
770 /* merge any continuous blocks in laarr */
771 udf_merge_extents(inode, laarr, &endnum);
773 /* write back the new extents, inserting new extents if the new number
774 * of extents is greater than the old number, and deleting extents if
775 * the new number of extents is less than the old number */
776 udf_update_extents(inode, laarr, startnum, endnum, &prev_epos);
778 brelse(prev_epos.bh);
780 brelse(next_epos.bh);
782 newblock = udf_get_pblock(inode->i_sb, newblocknum,
783 iinfo->i_location.partitionReferenceNum, 0);
789 iinfo->i_next_alloc_block = block;
790 iinfo->i_next_alloc_goal = newblocknum;
791 inode->i_ctime = current_fs_time(inode->i_sb);
794 udf_sync_inode(inode);
796 mark_inode_dirty(inode);
801 static void udf_split_extents(struct inode *inode, int *c, int offset,
803 struct kernel_long_ad laarr[EXTENT_MERGE_SIZE],
806 unsigned long blocksize = inode->i_sb->s_blocksize;
807 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits;
809 if ((laarr[*c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30) ||
810 (laarr[*c].extLength >> 30) ==
811 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) {
813 int blen = ((laarr[curr].extLength & UDF_EXTENT_LENGTH_MASK) +
814 blocksize - 1) >> blocksize_bits;
815 int8_t etype = (laarr[curr].extLength >> 30);
819 else if (!offset || blen == offset + 1) {
820 laarr[curr + 2] = laarr[curr + 1];
821 laarr[curr + 1] = laarr[curr];
823 laarr[curr + 3] = laarr[curr + 1];
824 laarr[curr + 2] = laarr[curr + 1] = laarr[curr];
828 if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30)) {
829 udf_free_blocks(inode->i_sb, inode,
830 &laarr[curr].extLocation,
832 laarr[curr].extLength =
833 EXT_NOT_RECORDED_NOT_ALLOCATED |
834 (offset << blocksize_bits);
835 laarr[curr].extLocation.logicalBlockNum = 0;
836 laarr[curr].extLocation.
837 partitionReferenceNum = 0;
839 laarr[curr].extLength = (etype << 30) |
840 (offset << blocksize_bits);
846 laarr[curr].extLocation.logicalBlockNum = newblocknum;
847 if (etype == (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))
848 laarr[curr].extLocation.partitionReferenceNum =
849 UDF_I(inode)->i_location.partitionReferenceNum;
850 laarr[curr].extLength = EXT_RECORDED_ALLOCATED |
854 if (blen != offset + 1) {
855 if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30))
856 laarr[curr].extLocation.logicalBlockNum +=
858 laarr[curr].extLength = (etype << 30) |
859 ((blen - (offset + 1)) << blocksize_bits);
866 static void udf_prealloc_extents(struct inode *inode, int c, int lastblock,
867 struct kernel_long_ad laarr[EXTENT_MERGE_SIZE],
870 int start, length = 0, currlength = 0, i;
872 if (*endnum >= (c + 1)) {
878 if ((laarr[c + 1].extLength >> 30) ==
879 (EXT_NOT_RECORDED_ALLOCATED >> 30)) {
881 length = currlength =
882 (((laarr[c + 1].extLength &
883 UDF_EXTENT_LENGTH_MASK) +
884 inode->i_sb->s_blocksize - 1) >>
885 inode->i_sb->s_blocksize_bits);
890 for (i = start + 1; i <= *endnum; i++) {
893 length += UDF_DEFAULT_PREALLOC_BLOCKS;
894 } else if ((laarr[i].extLength >> 30) ==
895 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) {
896 length += (((laarr[i].extLength &
897 UDF_EXTENT_LENGTH_MASK) +
898 inode->i_sb->s_blocksize - 1) >>
899 inode->i_sb->s_blocksize_bits);
905 int next = laarr[start].extLocation.logicalBlockNum +
906 (((laarr[start].extLength & UDF_EXTENT_LENGTH_MASK) +
907 inode->i_sb->s_blocksize - 1) >>
908 inode->i_sb->s_blocksize_bits);
909 int numalloc = udf_prealloc_blocks(inode->i_sb, inode,
910 laarr[start].extLocation.partitionReferenceNum,
911 next, (UDF_DEFAULT_PREALLOC_BLOCKS > length ?
912 length : UDF_DEFAULT_PREALLOC_BLOCKS) -
915 if (start == (c + 1))
916 laarr[start].extLength +=
918 inode->i_sb->s_blocksize_bits);
920 memmove(&laarr[c + 2], &laarr[c + 1],
921 sizeof(struct long_ad) * (*endnum - (c + 1)));
923 laarr[c + 1].extLocation.logicalBlockNum = next;
924 laarr[c + 1].extLocation.partitionReferenceNum =
925 laarr[c].extLocation.
926 partitionReferenceNum;
927 laarr[c + 1].extLength =
928 EXT_NOT_RECORDED_ALLOCATED |
930 inode->i_sb->s_blocksize_bits);
934 for (i = start + 1; numalloc && i < *endnum; i++) {
935 int elen = ((laarr[i].extLength &
936 UDF_EXTENT_LENGTH_MASK) +
937 inode->i_sb->s_blocksize - 1) >>
938 inode->i_sb->s_blocksize_bits;
940 if (elen > numalloc) {
941 laarr[i].extLength -=
943 inode->i_sb->s_blocksize_bits);
947 if (*endnum > (i + 1))
950 sizeof(struct long_ad) *
951 (*endnum - (i + 1)));
956 UDF_I(inode)->i_lenExtents +=
957 numalloc << inode->i_sb->s_blocksize_bits;
962 static void udf_merge_extents(struct inode *inode,
963 struct kernel_long_ad laarr[EXTENT_MERGE_SIZE],
967 unsigned long blocksize = inode->i_sb->s_blocksize;
968 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits;
970 for (i = 0; i < (*endnum - 1); i++) {
971 struct kernel_long_ad *li /*l[i]*/ = &laarr[i];
972 struct kernel_long_ad *lip1 /*l[i plus 1]*/ = &laarr[i + 1];
974 if (((li->extLength >> 30) == (lip1->extLength >> 30)) &&
975 (((li->extLength >> 30) ==
976 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) ||
977 ((lip1->extLocation.logicalBlockNum -
978 li->extLocation.logicalBlockNum) ==
979 (((li->extLength & UDF_EXTENT_LENGTH_MASK) +
980 blocksize - 1) >> blocksize_bits)))) {
982 if (((li->extLength & UDF_EXTENT_LENGTH_MASK) +
983 (lip1->extLength & UDF_EXTENT_LENGTH_MASK) +
984 blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) {
985 lip1->extLength = (lip1->extLength -
987 UDF_EXTENT_LENGTH_MASK) +
988 UDF_EXTENT_LENGTH_MASK) &
990 li->extLength = (li->extLength &
991 UDF_EXTENT_FLAG_MASK) +
992 (UDF_EXTENT_LENGTH_MASK + 1) -
994 lip1->extLocation.logicalBlockNum =
995 li->extLocation.logicalBlockNum +
997 UDF_EXTENT_LENGTH_MASK) >>
1000 li->extLength = lip1->extLength +
1002 UDF_EXTENT_LENGTH_MASK) +
1003 blocksize - 1) & ~(blocksize - 1));
1004 if (*endnum > (i + 2))
1005 memmove(&laarr[i + 1], &laarr[i + 2],
1006 sizeof(struct long_ad) *
1007 (*endnum - (i + 2)));
1011 } else if (((li->extLength >> 30) ==
1012 (EXT_NOT_RECORDED_ALLOCATED >> 30)) &&
1013 ((lip1->extLength >> 30) ==
1014 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))) {
1015 udf_free_blocks(inode->i_sb, inode, &li->extLocation, 0,
1017 UDF_EXTENT_LENGTH_MASK) +
1018 blocksize - 1) >> blocksize_bits);
1019 li->extLocation.logicalBlockNum = 0;
1020 li->extLocation.partitionReferenceNum = 0;
1022 if (((li->extLength & UDF_EXTENT_LENGTH_MASK) +
1023 (lip1->extLength & UDF_EXTENT_LENGTH_MASK) +
1024 blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) {
1025 lip1->extLength = (lip1->extLength -
1027 UDF_EXTENT_LENGTH_MASK) +
1028 UDF_EXTENT_LENGTH_MASK) &
1030 li->extLength = (li->extLength &
1031 UDF_EXTENT_FLAG_MASK) +
1032 (UDF_EXTENT_LENGTH_MASK + 1) -
1035 li->extLength = lip1->extLength +
1037 UDF_EXTENT_LENGTH_MASK) +
1038 blocksize - 1) & ~(blocksize - 1));
1039 if (*endnum > (i + 2))
1040 memmove(&laarr[i + 1], &laarr[i + 2],
1041 sizeof(struct long_ad) *
1042 (*endnum - (i + 2)));
1046 } else if ((li->extLength >> 30) ==
1047 (EXT_NOT_RECORDED_ALLOCATED >> 30)) {
1048 udf_free_blocks(inode->i_sb, inode,
1049 &li->extLocation, 0,
1051 UDF_EXTENT_LENGTH_MASK) +
1052 blocksize - 1) >> blocksize_bits);
1053 li->extLocation.logicalBlockNum = 0;
1054 li->extLocation.partitionReferenceNum = 0;
1055 li->extLength = (li->extLength &
1056 UDF_EXTENT_LENGTH_MASK) |
1057 EXT_NOT_RECORDED_NOT_ALLOCATED;
1062 static void udf_update_extents(struct inode *inode,
1063 struct kernel_long_ad laarr[EXTENT_MERGE_SIZE],
1064 int startnum, int endnum,
1065 struct extent_position *epos)
1068 struct kernel_lb_addr tmploc;
1071 if (startnum > endnum) {
1072 for (i = 0; i < (startnum - endnum); i++)
1073 udf_delete_aext(inode, *epos, laarr[i].extLocation,
1074 laarr[i].extLength);
1075 } else if (startnum < endnum) {
1076 for (i = 0; i < (endnum - startnum); i++) {
1077 udf_insert_aext(inode, *epos, laarr[i].extLocation,
1078 laarr[i].extLength);
1079 udf_next_aext(inode, epos, &laarr[i].extLocation,
1080 &laarr[i].extLength, 1);
1085 for (i = start; i < endnum; i++) {
1086 udf_next_aext(inode, epos, &tmploc, &tmplen, 0);
1087 udf_write_aext(inode, epos, &laarr[i].extLocation,
1088 laarr[i].extLength, 1);
1092 struct buffer_head *udf_bread(struct inode *inode, int block,
1093 int create, int *err)
1095 struct buffer_head *bh = NULL;
1097 bh = udf_getblk(inode, block, create, err);
1101 if (buffer_uptodate(bh))
1104 ll_rw_block(READ, 1, &bh);
1107 if (buffer_uptodate(bh))
1115 int udf_setsize(struct inode *inode, loff_t newsize)
1118 struct udf_inode_info *iinfo;
1119 int bsize = 1 << inode->i_blkbits;
1121 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
1122 S_ISLNK(inode->i_mode)))
1124 if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
1127 iinfo = UDF_I(inode);
1128 if (newsize > inode->i_size) {
1129 down_write(&iinfo->i_data_sem);
1130 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
1132 (udf_file_entry_alloc_offset(inode) + newsize)) {
1133 err = udf_expand_file_adinicb(inode);
1136 down_write(&iinfo->i_data_sem);
1138 iinfo->i_lenAlloc = newsize;
1140 err = udf_extend_file(inode, newsize);
1142 up_write(&iinfo->i_data_sem);
1145 truncate_setsize(inode, newsize);
1146 up_write(&iinfo->i_data_sem);
1148 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
1149 down_write(&iinfo->i_data_sem);
1150 memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr + newsize,
1151 0x00, bsize - newsize -
1152 udf_file_entry_alloc_offset(inode));
1153 iinfo->i_lenAlloc = newsize;
1154 truncate_setsize(inode, newsize);
1155 up_write(&iinfo->i_data_sem);
1158 err = block_truncate_page(inode->i_mapping, newsize,
1162 down_write(&iinfo->i_data_sem);
1163 truncate_setsize(inode, newsize);
1164 udf_truncate_extents(inode);
1165 up_write(&iinfo->i_data_sem);
1168 inode->i_mtime = inode->i_ctime = current_fs_time(inode->i_sb);
1170 udf_sync_inode(inode);
1172 mark_inode_dirty(inode);
1176 static void __udf_read_inode(struct inode *inode)
1178 struct buffer_head *bh = NULL;
1179 struct fileEntry *fe;
1181 struct udf_inode_info *iinfo = UDF_I(inode);
1184 * Set defaults, but the inode is still incomplete!
1185 * Note: get_new_inode() sets the following on a new inode:
1188 * i_flags = sb->s_flags
1190 * clean_inode(): zero fills and sets
1195 bh = udf_read_ptagged(inode->i_sb, &iinfo->i_location, 0, &ident);
1197 udf_err(inode->i_sb, "(ino %ld) failed !bh\n", inode->i_ino);
1198 make_bad_inode(inode);
1202 if (ident != TAG_IDENT_FE && ident != TAG_IDENT_EFE &&
1203 ident != TAG_IDENT_USE) {
1204 udf_err(inode->i_sb, "(ino %ld) failed ident=%d\n",
1205 inode->i_ino, ident);
1207 make_bad_inode(inode);
1211 fe = (struct fileEntry *)bh->b_data;
1213 if (fe->icbTag.strategyType == cpu_to_le16(4096)) {
1214 struct buffer_head *ibh;
1216 ibh = udf_read_ptagged(inode->i_sb, &iinfo->i_location, 1,
1218 if (ident == TAG_IDENT_IE && ibh) {
1219 struct buffer_head *nbh = NULL;
1220 struct kernel_lb_addr loc;
1221 struct indirectEntry *ie;
1223 ie = (struct indirectEntry *)ibh->b_data;
1224 loc = lelb_to_cpu(ie->indirectICB.extLocation);
1226 if (ie->indirectICB.extLength &&
1227 (nbh = udf_read_ptagged(inode->i_sb, &loc, 0,
1229 if (ident == TAG_IDENT_FE ||
1230 ident == TAG_IDENT_EFE) {
1231 memcpy(&iinfo->i_location,
1233 sizeof(struct kernel_lb_addr));
1237 __udf_read_inode(inode);
1244 } else if (fe->icbTag.strategyType != cpu_to_le16(4)) {
1245 udf_err(inode->i_sb, "unsupported strategy type: %d\n",
1246 le16_to_cpu(fe->icbTag.strategyType));
1248 make_bad_inode(inode);
1251 udf_fill_inode(inode, bh);
1256 static void udf_fill_inode(struct inode *inode, struct buffer_head *bh)
1258 struct fileEntry *fe;
1259 struct extendedFileEntry *efe;
1261 struct udf_sb_info *sbi = UDF_SB(inode->i_sb);
1262 struct udf_inode_info *iinfo = UDF_I(inode);
1263 unsigned int link_count;
1265 fe = (struct fileEntry *)bh->b_data;
1266 efe = (struct extendedFileEntry *)bh->b_data;
1268 if (fe->icbTag.strategyType == cpu_to_le16(4))
1269 iinfo->i_strat4096 = 0;
1270 else /* if (fe->icbTag.strategyType == cpu_to_le16(4096)) */
1271 iinfo->i_strat4096 = 1;
1273 iinfo->i_alloc_type = le16_to_cpu(fe->icbTag.flags) &
1274 ICBTAG_FLAG_AD_MASK;
1275 iinfo->i_unique = 0;
1276 iinfo->i_lenEAttr = 0;
1277 iinfo->i_lenExtents = 0;
1278 iinfo->i_lenAlloc = 0;
1279 iinfo->i_next_alloc_block = 0;
1280 iinfo->i_next_alloc_goal = 0;
1281 if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_EFE)) {
1284 if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize -
1285 sizeof(struct extendedFileEntry))) {
1286 make_bad_inode(inode);
1289 memcpy(iinfo->i_ext.i_data,
1290 bh->b_data + sizeof(struct extendedFileEntry),
1291 inode->i_sb->s_blocksize -
1292 sizeof(struct extendedFileEntry));
1293 } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_FE)) {
1296 if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize -
1297 sizeof(struct fileEntry))) {
1298 make_bad_inode(inode);
1301 memcpy(iinfo->i_ext.i_data,
1302 bh->b_data + sizeof(struct fileEntry),
1303 inode->i_sb->s_blocksize - sizeof(struct fileEntry));
1304 } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_USE)) {
1307 iinfo->i_lenAlloc = le32_to_cpu(
1308 ((struct unallocSpaceEntry *)bh->b_data)->
1310 if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize -
1311 sizeof(struct unallocSpaceEntry))) {
1312 make_bad_inode(inode);
1315 memcpy(iinfo->i_ext.i_data,
1316 bh->b_data + sizeof(struct unallocSpaceEntry),
1317 inode->i_sb->s_blocksize -
1318 sizeof(struct unallocSpaceEntry));
1322 read_lock(&sbi->s_cred_lock);
1323 inode->i_uid = le32_to_cpu(fe->uid);
1324 if (inode->i_uid == -1 ||
1325 UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_IGNORE) ||
1326 UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_SET))
1327 inode->i_uid = UDF_SB(inode->i_sb)->s_uid;
1329 inode->i_gid = le32_to_cpu(fe->gid);
1330 if (inode->i_gid == -1 ||
1331 UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_IGNORE) ||
1332 UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_SET))
1333 inode->i_gid = UDF_SB(inode->i_sb)->s_gid;
1335 if (fe->icbTag.fileType != ICBTAG_FILE_TYPE_DIRECTORY &&
1336 sbi->s_fmode != UDF_INVALID_MODE)
1337 inode->i_mode = sbi->s_fmode;
1338 else if (fe->icbTag.fileType == ICBTAG_FILE_TYPE_DIRECTORY &&
1339 sbi->s_dmode != UDF_INVALID_MODE)
1340 inode->i_mode = sbi->s_dmode;
1342 inode->i_mode = udf_convert_permissions(fe);
1343 inode->i_mode &= ~sbi->s_umask;
1344 read_unlock(&sbi->s_cred_lock);
1346 link_count = le16_to_cpu(fe->fileLinkCount);
1349 set_nlink(inode, link_count);
1351 inode->i_size = le64_to_cpu(fe->informationLength);
1352 iinfo->i_lenExtents = inode->i_size;
1354 if (iinfo->i_efe == 0) {
1355 inode->i_blocks = le64_to_cpu(fe->logicalBlocksRecorded) <<
1356 (inode->i_sb->s_blocksize_bits - 9);
1358 if (!udf_disk_stamp_to_time(&inode->i_atime, fe->accessTime))
1359 inode->i_atime = sbi->s_record_time;
1361 if (!udf_disk_stamp_to_time(&inode->i_mtime,
1362 fe->modificationTime))
1363 inode->i_mtime = sbi->s_record_time;
1365 if (!udf_disk_stamp_to_time(&inode->i_ctime, fe->attrTime))
1366 inode->i_ctime = sbi->s_record_time;
1368 iinfo->i_unique = le64_to_cpu(fe->uniqueID);
1369 iinfo->i_lenEAttr = le32_to_cpu(fe->lengthExtendedAttr);
1370 iinfo->i_lenAlloc = le32_to_cpu(fe->lengthAllocDescs);
1371 offset = sizeof(struct fileEntry) + iinfo->i_lenEAttr;
1373 inode->i_blocks = le64_to_cpu(efe->logicalBlocksRecorded) <<
1374 (inode->i_sb->s_blocksize_bits - 9);
1376 if (!udf_disk_stamp_to_time(&inode->i_atime, efe->accessTime))
1377 inode->i_atime = sbi->s_record_time;
1379 if (!udf_disk_stamp_to_time(&inode->i_mtime,
1380 efe->modificationTime))
1381 inode->i_mtime = sbi->s_record_time;
1383 if (!udf_disk_stamp_to_time(&iinfo->i_crtime, efe->createTime))
1384 iinfo->i_crtime = sbi->s_record_time;
1386 if (!udf_disk_stamp_to_time(&inode->i_ctime, efe->attrTime))
1387 inode->i_ctime = sbi->s_record_time;
1389 iinfo->i_unique = le64_to_cpu(efe->uniqueID);
1390 iinfo->i_lenEAttr = le32_to_cpu(efe->lengthExtendedAttr);
1391 iinfo->i_lenAlloc = le32_to_cpu(efe->lengthAllocDescs);
1392 offset = sizeof(struct extendedFileEntry) +
1396 switch (fe->icbTag.fileType) {
1397 case ICBTAG_FILE_TYPE_DIRECTORY:
1398 inode->i_op = &udf_dir_inode_operations;
1399 inode->i_fop = &udf_dir_operations;
1400 inode->i_mode |= S_IFDIR;
1403 case ICBTAG_FILE_TYPE_REALTIME:
1404 case ICBTAG_FILE_TYPE_REGULAR:
1405 case ICBTAG_FILE_TYPE_UNDEF:
1406 case ICBTAG_FILE_TYPE_VAT20:
1407 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
1408 inode->i_data.a_ops = &udf_adinicb_aops;
1410 inode->i_data.a_ops = &udf_aops;
1411 inode->i_op = &udf_file_inode_operations;
1412 inode->i_fop = &udf_file_operations;
1413 inode->i_mode |= S_IFREG;
1415 case ICBTAG_FILE_TYPE_BLOCK:
1416 inode->i_mode |= S_IFBLK;
1418 case ICBTAG_FILE_TYPE_CHAR:
1419 inode->i_mode |= S_IFCHR;
1421 case ICBTAG_FILE_TYPE_FIFO:
1422 init_special_inode(inode, inode->i_mode | S_IFIFO, 0);
1424 case ICBTAG_FILE_TYPE_SOCKET:
1425 init_special_inode(inode, inode->i_mode | S_IFSOCK, 0);
1427 case ICBTAG_FILE_TYPE_SYMLINK:
1428 inode->i_data.a_ops = &udf_symlink_aops;
1429 inode->i_op = &udf_symlink_inode_operations;
1430 inode->i_mode = S_IFLNK | S_IRWXUGO;
1432 case ICBTAG_FILE_TYPE_MAIN:
1433 udf_debug("METADATA FILE-----\n");
1435 case ICBTAG_FILE_TYPE_MIRROR:
1436 udf_debug("METADATA MIRROR FILE-----\n");
1438 case ICBTAG_FILE_TYPE_BITMAP:
1439 udf_debug("METADATA BITMAP FILE-----\n");
1442 udf_err(inode->i_sb, "(ino %ld) failed unknown file type=%d\n",
1443 inode->i_ino, fe->icbTag.fileType);
1444 make_bad_inode(inode);
1447 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
1448 struct deviceSpec *dsea =
1449 (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1);
1451 init_special_inode(inode, inode->i_mode,
1452 MKDEV(le32_to_cpu(dsea->majorDeviceIdent),
1453 le32_to_cpu(dsea->minorDeviceIdent)));
1454 /* Developer ID ??? */
1456 make_bad_inode(inode);
1460 static int udf_alloc_i_data(struct inode *inode, size_t size)
1462 struct udf_inode_info *iinfo = UDF_I(inode);
1463 iinfo->i_ext.i_data = kmalloc(size, GFP_KERNEL);
1465 if (!iinfo->i_ext.i_data) {
1466 udf_err(inode->i_sb, "(ino %ld) no free memory\n",
1474 static mode_t udf_convert_permissions(struct fileEntry *fe)
1477 uint32_t permissions;
1480 permissions = le32_to_cpu(fe->permissions);
1481 flags = le16_to_cpu(fe->icbTag.flags);
1483 mode = ((permissions) & S_IRWXO) |
1484 ((permissions >> 2) & S_IRWXG) |
1485 ((permissions >> 4) & S_IRWXU) |
1486 ((flags & ICBTAG_FLAG_SETUID) ? S_ISUID : 0) |
1487 ((flags & ICBTAG_FLAG_SETGID) ? S_ISGID : 0) |
1488 ((flags & ICBTAG_FLAG_STICKY) ? S_ISVTX : 0);
1493 int udf_write_inode(struct inode *inode, struct writeback_control *wbc)
1495 return udf_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL);
1498 static int udf_sync_inode(struct inode *inode)
1500 return udf_update_inode(inode, 1);
1503 static int udf_update_inode(struct inode *inode, int do_sync)
1505 struct buffer_head *bh = NULL;
1506 struct fileEntry *fe;
1507 struct extendedFileEntry *efe;
1512 struct udf_sb_info *sbi = UDF_SB(inode->i_sb);
1513 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits;
1514 struct udf_inode_info *iinfo = UDF_I(inode);
1516 bh = udf_tgetblk(inode->i_sb,
1517 udf_get_lb_pblock(inode->i_sb, &iinfo->i_location, 0));
1519 udf_debug("getblk failure\n");
1524 memset(bh->b_data, 0, inode->i_sb->s_blocksize);
1525 fe = (struct fileEntry *)bh->b_data;
1526 efe = (struct extendedFileEntry *)bh->b_data;
1529 struct unallocSpaceEntry *use =
1530 (struct unallocSpaceEntry *)bh->b_data;
1532 use->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc);
1533 memcpy(bh->b_data + sizeof(struct unallocSpaceEntry),
1534 iinfo->i_ext.i_data, inode->i_sb->s_blocksize -
1535 sizeof(struct unallocSpaceEntry));
1536 use->descTag.tagIdent = cpu_to_le16(TAG_IDENT_USE);
1537 use->descTag.tagLocation =
1538 cpu_to_le32(iinfo->i_location.logicalBlockNum);
1539 crclen = sizeof(struct unallocSpaceEntry) +
1540 iinfo->i_lenAlloc - sizeof(struct tag);
1541 use->descTag.descCRCLength = cpu_to_le16(crclen);
1542 use->descTag.descCRC = cpu_to_le16(crc_itu_t(0, (char *)use +
1545 use->descTag.tagChecksum = udf_tag_checksum(&use->descTag);
1550 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_FORGET))
1551 fe->uid = cpu_to_le32(-1);
1553 fe->uid = cpu_to_le32(inode->i_uid);
1555 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_FORGET))
1556 fe->gid = cpu_to_le32(-1);
1558 fe->gid = cpu_to_le32(inode->i_gid);
1560 udfperms = ((inode->i_mode & S_IRWXO)) |
1561 ((inode->i_mode & S_IRWXG) << 2) |
1562 ((inode->i_mode & S_IRWXU) << 4);
1564 udfperms |= (le32_to_cpu(fe->permissions) &
1565 (FE_PERM_O_DELETE | FE_PERM_O_CHATTR |
1566 FE_PERM_G_DELETE | FE_PERM_G_CHATTR |
1567 FE_PERM_U_DELETE | FE_PERM_U_CHATTR));
1568 fe->permissions = cpu_to_le32(udfperms);
1570 if (S_ISDIR(inode->i_mode))
1571 fe->fileLinkCount = cpu_to_le16(inode->i_nlink - 1);
1573 fe->fileLinkCount = cpu_to_le16(inode->i_nlink);
1575 fe->informationLength = cpu_to_le64(inode->i_size);
1577 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
1579 struct deviceSpec *dsea =
1580 (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1);
1582 dsea = (struct deviceSpec *)
1583 udf_add_extendedattr(inode,
1584 sizeof(struct deviceSpec) +
1585 sizeof(struct regid), 12, 0x3);
1586 dsea->attrType = cpu_to_le32(12);
1587 dsea->attrSubtype = 1;
1588 dsea->attrLength = cpu_to_le32(
1589 sizeof(struct deviceSpec) +
1590 sizeof(struct regid));
1591 dsea->impUseLength = cpu_to_le32(sizeof(struct regid));
1593 eid = (struct regid *)dsea->impUse;
1594 memset(eid, 0, sizeof(struct regid));
1595 strcpy(eid->ident, UDF_ID_DEVELOPER);
1596 eid->identSuffix[0] = UDF_OS_CLASS_UNIX;
1597 eid->identSuffix[1] = UDF_OS_ID_LINUX;
1598 dsea->majorDeviceIdent = cpu_to_le32(imajor(inode));
1599 dsea->minorDeviceIdent = cpu_to_le32(iminor(inode));
1602 if (iinfo->i_efe == 0) {
1603 memcpy(bh->b_data + sizeof(struct fileEntry),
1604 iinfo->i_ext.i_data,
1605 inode->i_sb->s_blocksize - sizeof(struct fileEntry));
1606 fe->logicalBlocksRecorded = cpu_to_le64(
1607 (inode->i_blocks + (1 << (blocksize_bits - 9)) - 1) >>
1608 (blocksize_bits - 9));
1610 udf_time_to_disk_stamp(&fe->accessTime, inode->i_atime);
1611 udf_time_to_disk_stamp(&fe->modificationTime, inode->i_mtime);
1612 udf_time_to_disk_stamp(&fe->attrTime, inode->i_ctime);
1613 memset(&(fe->impIdent), 0, sizeof(struct regid));
1614 strcpy(fe->impIdent.ident, UDF_ID_DEVELOPER);
1615 fe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1616 fe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1617 fe->uniqueID = cpu_to_le64(iinfo->i_unique);
1618 fe->lengthExtendedAttr = cpu_to_le32(iinfo->i_lenEAttr);
1619 fe->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc);
1620 fe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_FE);
1621 crclen = sizeof(struct fileEntry);
1623 memcpy(bh->b_data + sizeof(struct extendedFileEntry),
1624 iinfo->i_ext.i_data,
1625 inode->i_sb->s_blocksize -
1626 sizeof(struct extendedFileEntry));
1627 efe->objectSize = cpu_to_le64(inode->i_size);
1628 efe->logicalBlocksRecorded = cpu_to_le64(
1629 (inode->i_blocks + (1 << (blocksize_bits - 9)) - 1) >>
1630 (blocksize_bits - 9));
1632 if (iinfo->i_crtime.tv_sec > inode->i_atime.tv_sec ||
1633 (iinfo->i_crtime.tv_sec == inode->i_atime.tv_sec &&
1634 iinfo->i_crtime.tv_nsec > inode->i_atime.tv_nsec))
1635 iinfo->i_crtime = inode->i_atime;
1637 if (iinfo->i_crtime.tv_sec > inode->i_mtime.tv_sec ||
1638 (iinfo->i_crtime.tv_sec == inode->i_mtime.tv_sec &&
1639 iinfo->i_crtime.tv_nsec > inode->i_mtime.tv_nsec))
1640 iinfo->i_crtime = inode->i_mtime;
1642 if (iinfo->i_crtime.tv_sec > inode->i_ctime.tv_sec ||
1643 (iinfo->i_crtime.tv_sec == inode->i_ctime.tv_sec &&
1644 iinfo->i_crtime.tv_nsec > inode->i_ctime.tv_nsec))
1645 iinfo->i_crtime = inode->i_ctime;
1647 udf_time_to_disk_stamp(&efe->accessTime, inode->i_atime);
1648 udf_time_to_disk_stamp(&efe->modificationTime, inode->i_mtime);
1649 udf_time_to_disk_stamp(&efe->createTime, iinfo->i_crtime);
1650 udf_time_to_disk_stamp(&efe->attrTime, inode->i_ctime);
1652 memset(&(efe->impIdent), 0, sizeof(struct regid));
1653 strcpy(efe->impIdent.ident, UDF_ID_DEVELOPER);
1654 efe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1655 efe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1656 efe->uniqueID = cpu_to_le64(iinfo->i_unique);
1657 efe->lengthExtendedAttr = cpu_to_le32(iinfo->i_lenEAttr);
1658 efe->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc);
1659 efe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_EFE);
1660 crclen = sizeof(struct extendedFileEntry);
1662 if (iinfo->i_strat4096) {
1663 fe->icbTag.strategyType = cpu_to_le16(4096);
1664 fe->icbTag.strategyParameter = cpu_to_le16(1);
1665 fe->icbTag.numEntries = cpu_to_le16(2);
1667 fe->icbTag.strategyType = cpu_to_le16(4);
1668 fe->icbTag.numEntries = cpu_to_le16(1);
1671 if (S_ISDIR(inode->i_mode))
1672 fe->icbTag.fileType = ICBTAG_FILE_TYPE_DIRECTORY;
1673 else if (S_ISREG(inode->i_mode))
1674 fe->icbTag.fileType = ICBTAG_FILE_TYPE_REGULAR;
1675 else if (S_ISLNK(inode->i_mode))
1676 fe->icbTag.fileType = ICBTAG_FILE_TYPE_SYMLINK;
1677 else if (S_ISBLK(inode->i_mode))
1678 fe->icbTag.fileType = ICBTAG_FILE_TYPE_BLOCK;
1679 else if (S_ISCHR(inode->i_mode))
1680 fe->icbTag.fileType = ICBTAG_FILE_TYPE_CHAR;
1681 else if (S_ISFIFO(inode->i_mode))
1682 fe->icbTag.fileType = ICBTAG_FILE_TYPE_FIFO;
1683 else if (S_ISSOCK(inode->i_mode))
1684 fe->icbTag.fileType = ICBTAG_FILE_TYPE_SOCKET;
1686 icbflags = iinfo->i_alloc_type |
1687 ((inode->i_mode & S_ISUID) ? ICBTAG_FLAG_SETUID : 0) |
1688 ((inode->i_mode & S_ISGID) ? ICBTAG_FLAG_SETGID : 0) |
1689 ((inode->i_mode & S_ISVTX) ? ICBTAG_FLAG_STICKY : 0) |
1690 (le16_to_cpu(fe->icbTag.flags) &
1691 ~(ICBTAG_FLAG_AD_MASK | ICBTAG_FLAG_SETUID |
1692 ICBTAG_FLAG_SETGID | ICBTAG_FLAG_STICKY));
1694 fe->icbTag.flags = cpu_to_le16(icbflags);
1695 if (sbi->s_udfrev >= 0x0200)
1696 fe->descTag.descVersion = cpu_to_le16(3);
1698 fe->descTag.descVersion = cpu_to_le16(2);
1699 fe->descTag.tagSerialNum = cpu_to_le16(sbi->s_serial_number);
1700 fe->descTag.tagLocation = cpu_to_le32(
1701 iinfo->i_location.logicalBlockNum);
1702 crclen += iinfo->i_lenEAttr + iinfo->i_lenAlloc - sizeof(struct tag);
1703 fe->descTag.descCRCLength = cpu_to_le16(crclen);
1704 fe->descTag.descCRC = cpu_to_le16(crc_itu_t(0, (char *)fe + sizeof(struct tag),
1706 fe->descTag.tagChecksum = udf_tag_checksum(&fe->descTag);
1709 set_buffer_uptodate(bh);
1712 /* write the data blocks */
1713 mark_buffer_dirty(bh);
1715 sync_dirty_buffer(bh);
1716 if (buffer_write_io_error(bh)) {
1717 udf_warn(inode->i_sb, "IO error syncing udf inode [%08lx]\n",
1727 struct inode *udf_iget(struct super_block *sb, struct kernel_lb_addr *ino)
1729 unsigned long block = udf_get_lb_pblock(sb, ino, 0);
1730 struct inode *inode = iget_locked(sb, block);
1735 if (inode->i_state & I_NEW) {
1736 memcpy(&UDF_I(inode)->i_location, ino, sizeof(struct kernel_lb_addr));
1737 __udf_read_inode(inode);
1738 unlock_new_inode(inode);
1741 if (is_bad_inode(inode))
1744 if (ino->logicalBlockNum >= UDF_SB(sb)->
1745 s_partmaps[ino->partitionReferenceNum].s_partition_len) {
1746 udf_debug("block=%d, partition=%d out of range\n",
1747 ino->logicalBlockNum, ino->partitionReferenceNum);
1748 make_bad_inode(inode);
1759 int udf_add_aext(struct inode *inode, struct extent_position *epos,
1760 struct kernel_lb_addr *eloc, uint32_t elen, int inc)
1763 struct short_ad *sad = NULL;
1764 struct long_ad *lad = NULL;
1765 struct allocExtDesc *aed;
1767 struct udf_inode_info *iinfo = UDF_I(inode);
1770 ptr = iinfo->i_ext.i_data + epos->offset -
1771 udf_file_entry_alloc_offset(inode) +
1774 ptr = epos->bh->b_data + epos->offset;
1776 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
1777 adsize = sizeof(struct short_ad);
1778 else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
1779 adsize = sizeof(struct long_ad);
1783 if (epos->offset + (2 * adsize) > inode->i_sb->s_blocksize) {
1784 unsigned char *sptr, *dptr;
1785 struct buffer_head *nbh;
1787 struct kernel_lb_addr obloc = epos->block;
1789 epos->block.logicalBlockNum = udf_new_block(inode->i_sb, NULL,
1790 obloc.partitionReferenceNum,
1791 obloc.logicalBlockNum, &err);
1792 if (!epos->block.logicalBlockNum)
1794 nbh = udf_tgetblk(inode->i_sb, udf_get_lb_pblock(inode->i_sb,
1800 memset(nbh->b_data, 0x00, inode->i_sb->s_blocksize);
1801 set_buffer_uptodate(nbh);
1803 mark_buffer_dirty_inode(nbh, inode);
1805 aed = (struct allocExtDesc *)(nbh->b_data);
1806 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT))
1807 aed->previousAllocExtLocation =
1808 cpu_to_le32(obloc.logicalBlockNum);
1809 if (epos->offset + adsize > inode->i_sb->s_blocksize) {
1810 loffset = epos->offset;
1811 aed->lengthAllocDescs = cpu_to_le32(adsize);
1812 sptr = ptr - adsize;
1813 dptr = nbh->b_data + sizeof(struct allocExtDesc);
1814 memcpy(dptr, sptr, adsize);
1815 epos->offset = sizeof(struct allocExtDesc) + adsize;
1817 loffset = epos->offset + adsize;
1818 aed->lengthAllocDescs = cpu_to_le32(0);
1820 epos->offset = sizeof(struct allocExtDesc);
1823 aed = (struct allocExtDesc *)epos->bh->b_data;
1824 le32_add_cpu(&aed->lengthAllocDescs, adsize);
1826 iinfo->i_lenAlloc += adsize;
1827 mark_inode_dirty(inode);
1830 if (UDF_SB(inode->i_sb)->s_udfrev >= 0x0200)
1831 udf_new_tag(nbh->b_data, TAG_IDENT_AED, 3, 1,
1832 epos->block.logicalBlockNum, sizeof(struct tag));
1834 udf_new_tag(nbh->b_data, TAG_IDENT_AED, 2, 1,
1835 epos->block.logicalBlockNum, sizeof(struct tag));
1836 switch (iinfo->i_alloc_type) {
1837 case ICBTAG_FLAG_AD_SHORT:
1838 sad = (struct short_ad *)sptr;
1839 sad->extLength = cpu_to_le32(EXT_NEXT_EXTENT_ALLOCDECS |
1840 inode->i_sb->s_blocksize);
1842 cpu_to_le32(epos->block.logicalBlockNum);
1844 case ICBTAG_FLAG_AD_LONG:
1845 lad = (struct long_ad *)sptr;
1846 lad->extLength = cpu_to_le32(EXT_NEXT_EXTENT_ALLOCDECS |
1847 inode->i_sb->s_blocksize);
1848 lad->extLocation = cpu_to_lelb(epos->block);
1849 memset(lad->impUse, 0x00, sizeof(lad->impUse));
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, loffset);
1857 udf_update_tag(epos->bh->b_data,
1858 sizeof(struct allocExtDesc));
1859 mark_buffer_dirty_inode(epos->bh, inode);
1862 mark_inode_dirty(inode);
1867 udf_write_aext(inode, epos, eloc, elen, inc);
1870 iinfo->i_lenAlloc += adsize;
1871 mark_inode_dirty(inode);
1873 aed = (struct allocExtDesc *)epos->bh->b_data;
1874 le32_add_cpu(&aed->lengthAllocDescs, adsize);
1875 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
1876 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201)
1877 udf_update_tag(epos->bh->b_data,
1878 epos->offset + (inc ? 0 : adsize));
1880 udf_update_tag(epos->bh->b_data,
1881 sizeof(struct allocExtDesc));
1882 mark_buffer_dirty_inode(epos->bh, inode);
1888 void udf_write_aext(struct inode *inode, struct extent_position *epos,
1889 struct kernel_lb_addr *eloc, uint32_t elen, int inc)
1893 struct short_ad *sad;
1894 struct long_ad *lad;
1895 struct udf_inode_info *iinfo = UDF_I(inode);
1898 ptr = iinfo->i_ext.i_data + epos->offset -
1899 udf_file_entry_alloc_offset(inode) +
1902 ptr = epos->bh->b_data + epos->offset;
1904 switch (iinfo->i_alloc_type) {
1905 case ICBTAG_FLAG_AD_SHORT:
1906 sad = (struct short_ad *)ptr;
1907 sad->extLength = cpu_to_le32(elen);
1908 sad->extPosition = cpu_to_le32(eloc->logicalBlockNum);
1909 adsize = sizeof(struct short_ad);
1911 case ICBTAG_FLAG_AD_LONG:
1912 lad = (struct long_ad *)ptr;
1913 lad->extLength = cpu_to_le32(elen);
1914 lad->extLocation = cpu_to_lelb(*eloc);
1915 memset(lad->impUse, 0x00, sizeof(lad->impUse));
1916 adsize = sizeof(struct long_ad);
1923 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
1924 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) {
1925 struct allocExtDesc *aed =
1926 (struct allocExtDesc *)epos->bh->b_data;
1927 udf_update_tag(epos->bh->b_data,
1928 le32_to_cpu(aed->lengthAllocDescs) +
1929 sizeof(struct allocExtDesc));
1931 mark_buffer_dirty_inode(epos->bh, inode);
1933 mark_inode_dirty(inode);
1937 epos->offset += adsize;
1940 int8_t udf_next_aext(struct inode *inode, struct extent_position *epos,
1941 struct kernel_lb_addr *eloc, uint32_t *elen, int inc)
1945 while ((etype = udf_current_aext(inode, epos, eloc, elen, inc)) ==
1946 (EXT_NEXT_EXTENT_ALLOCDECS >> 30)) {
1948 epos->block = *eloc;
1949 epos->offset = sizeof(struct allocExtDesc);
1951 block = udf_get_lb_pblock(inode->i_sb, &epos->block, 0);
1952 epos->bh = udf_tread(inode->i_sb, block);
1954 udf_debug("reading block %d failed!\n", block);
1962 int8_t udf_current_aext(struct inode *inode, struct extent_position *epos,
1963 struct kernel_lb_addr *eloc, uint32_t *elen, int inc)
1968 struct short_ad *sad;
1969 struct long_ad *lad;
1970 struct udf_inode_info *iinfo = UDF_I(inode);
1974 epos->offset = udf_file_entry_alloc_offset(inode);
1975 ptr = iinfo->i_ext.i_data + epos->offset -
1976 udf_file_entry_alloc_offset(inode) +
1978 alen = udf_file_entry_alloc_offset(inode) +
1982 epos->offset = sizeof(struct allocExtDesc);
1983 ptr = epos->bh->b_data + epos->offset;
1984 alen = sizeof(struct allocExtDesc) +
1985 le32_to_cpu(((struct allocExtDesc *)epos->bh->b_data)->
1989 switch (iinfo->i_alloc_type) {
1990 case ICBTAG_FLAG_AD_SHORT:
1991 sad = udf_get_fileshortad(ptr, alen, &epos->offset, inc);
1994 etype = le32_to_cpu(sad->extLength) >> 30;
1995 eloc->logicalBlockNum = le32_to_cpu(sad->extPosition);
1996 eloc->partitionReferenceNum =
1997 iinfo->i_location.partitionReferenceNum;
1998 *elen = le32_to_cpu(sad->extLength) & UDF_EXTENT_LENGTH_MASK;
2000 case ICBTAG_FLAG_AD_LONG:
2001 lad = udf_get_filelongad(ptr, alen, &epos->offset, inc);
2004 etype = le32_to_cpu(lad->extLength) >> 30;
2005 *eloc = lelb_to_cpu(lad->extLocation);
2006 *elen = le32_to_cpu(lad->extLength) & UDF_EXTENT_LENGTH_MASK;
2009 udf_debug("alloc_type = %d unsupported\n", iinfo->i_alloc_type);
2016 static int8_t udf_insert_aext(struct inode *inode, struct extent_position epos,
2017 struct kernel_lb_addr neloc, uint32_t nelen)
2019 struct kernel_lb_addr oeloc;
2026 while ((etype = udf_next_aext(inode, &epos, &oeloc, &oelen, 0)) != -1) {
2027 udf_write_aext(inode, &epos, &neloc, nelen, 1);
2029 nelen = (etype << 30) | oelen;
2031 udf_add_aext(inode, &epos, &neloc, nelen, 1);
2034 return (nelen >> 30);
2037 int8_t udf_delete_aext(struct inode *inode, struct extent_position epos,
2038 struct kernel_lb_addr eloc, uint32_t elen)
2040 struct extent_position oepos;
2043 struct allocExtDesc *aed;
2044 struct udf_inode_info *iinfo;
2051 iinfo = UDF_I(inode);
2052 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
2053 adsize = sizeof(struct short_ad);
2054 else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
2055 adsize = sizeof(struct long_ad);
2060 if (udf_next_aext(inode, &epos, &eloc, &elen, 1) == -1)
2063 while ((etype = udf_next_aext(inode, &epos, &eloc, &elen, 1)) != -1) {
2064 udf_write_aext(inode, &oepos, &eloc, (etype << 30) | elen, 1);
2065 if (oepos.bh != epos.bh) {
2066 oepos.block = epos.block;
2070 oepos.offset = epos.offset - adsize;
2073 memset(&eloc, 0x00, sizeof(struct kernel_lb_addr));
2076 if (epos.bh != oepos.bh) {
2077 udf_free_blocks(inode->i_sb, inode, &epos.block, 0, 1);
2078 udf_write_aext(inode, &oepos, &eloc, elen, 1);
2079 udf_write_aext(inode, &oepos, &eloc, elen, 1);
2081 iinfo->i_lenAlloc -= (adsize * 2);
2082 mark_inode_dirty(inode);
2084 aed = (struct allocExtDesc *)oepos.bh->b_data;
2085 le32_add_cpu(&aed->lengthAllocDescs, -(2 * adsize));
2086 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
2087 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201)
2088 udf_update_tag(oepos.bh->b_data,
2089 oepos.offset - (2 * adsize));
2091 udf_update_tag(oepos.bh->b_data,
2092 sizeof(struct allocExtDesc));
2093 mark_buffer_dirty_inode(oepos.bh, inode);
2096 udf_write_aext(inode, &oepos, &eloc, elen, 1);
2098 iinfo->i_lenAlloc -= adsize;
2099 mark_inode_dirty(inode);
2101 aed = (struct allocExtDesc *)oepos.bh->b_data;
2102 le32_add_cpu(&aed->lengthAllocDescs, -adsize);
2103 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
2104 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201)
2105 udf_update_tag(oepos.bh->b_data,
2106 epos.offset - adsize);
2108 udf_update_tag(oepos.bh->b_data,
2109 sizeof(struct allocExtDesc));
2110 mark_buffer_dirty_inode(oepos.bh, inode);
2117 return (elen >> 30);
2120 int8_t inode_bmap(struct inode *inode, sector_t block,
2121 struct extent_position *pos, struct kernel_lb_addr *eloc,
2122 uint32_t *elen, sector_t *offset)
2124 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits;
2125 loff_t lbcount = 0, bcount =
2126 (loff_t) block << blocksize_bits;
2128 struct udf_inode_info *iinfo;
2130 iinfo = UDF_I(inode);
2132 pos->block = iinfo->i_location;
2137 etype = udf_next_aext(inode, pos, eloc, elen, 1);
2139 *offset = (bcount - lbcount) >> blocksize_bits;
2140 iinfo->i_lenExtents = lbcount;
2144 } while (lbcount <= bcount);
2146 *offset = (bcount + *elen - lbcount) >> blocksize_bits;
2151 long udf_block_map(struct inode *inode, sector_t block)
2153 struct kernel_lb_addr eloc;
2156 struct extent_position epos = {};
2159 down_read(&UDF_I(inode)->i_data_sem);
2161 if (inode_bmap(inode, block, &epos, &eloc, &elen, &offset) ==
2162 (EXT_RECORDED_ALLOCATED >> 30))
2163 ret = udf_get_lb_pblock(inode->i_sb, &eloc, offset);
2167 up_read(&UDF_I(inode)->i_data_sem);
2170 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_VARCONV))
2171 return udf_fixed_to_variable(ret);