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;
586 prev_epos.offset = udf_file_entry_alloc_offset(inode);
587 prev_epos.block = iinfo->i_location;
589 cur_epos = next_epos = prev_epos;
590 b_off = (loff_t)block << inode->i_sb->s_blocksize_bits;
592 /* find the extent which contains the block we are looking for.
593 alternate between laarr[0] and laarr[1] for locations of the
594 current extent, and the previous extent */
596 if (prev_epos.bh != cur_epos.bh) {
597 brelse(prev_epos.bh);
599 prev_epos.bh = cur_epos.bh;
601 if (cur_epos.bh != next_epos.bh) {
603 get_bh(next_epos.bh);
604 cur_epos.bh = next_epos.bh;
609 prev_epos.block = cur_epos.block;
610 cur_epos.block = next_epos.block;
612 prev_epos.offset = cur_epos.offset;
613 cur_epos.offset = next_epos.offset;
615 etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 1);
621 laarr[c].extLength = (etype << 30) | elen;
622 laarr[c].extLocation = eloc;
624 if (etype != (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))
625 pgoal = eloc.logicalBlockNum +
626 ((elen + inode->i_sb->s_blocksize - 1) >>
627 inode->i_sb->s_blocksize_bits);
630 } while (lbcount + elen <= b_off);
633 offset = b_off >> inode->i_sb->s_blocksize_bits;
635 * Move prev_epos and cur_epos into indirect extent if we are at
638 udf_next_aext(inode, &prev_epos, &tmpeloc, &tmpelen, 0);
639 udf_next_aext(inode, &cur_epos, &tmpeloc, &tmpelen, 0);
641 /* if the extent is allocated and recorded, return the block
642 if the extent is not a multiple of the blocksize, round up */
644 if (etype == (EXT_RECORDED_ALLOCATED >> 30)) {
645 if (elen & (inode->i_sb->s_blocksize - 1)) {
646 elen = EXT_RECORDED_ALLOCATED |
647 ((elen + inode->i_sb->s_blocksize - 1) &
648 ~(inode->i_sb->s_blocksize - 1));
649 udf_write_aext(inode, &cur_epos, &eloc, elen, 1);
651 brelse(prev_epos.bh);
653 brelse(next_epos.bh);
654 newblock = udf_get_lb_pblock(inode->i_sb, &eloc, offset);
660 /* Are we beyond EOF? */
669 /* Create a fake extent when there's not one */
670 memset(&laarr[0].extLocation, 0x00,
671 sizeof(struct kernel_lb_addr));
672 laarr[0].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED;
673 /* Will udf_do_extend_file() create real extent from
675 startnum = (offset > 0);
677 /* Create extents for the hole between EOF and offset */
678 ret = udf_do_extend_file(inode, &prev_epos, laarr, offset);
680 brelse(prev_epos.bh);
682 brelse(next_epos.bh);
689 /* We are not covered by a preallocated extent? */
690 if ((laarr[0].extLength & UDF_EXTENT_FLAG_MASK) !=
691 EXT_NOT_RECORDED_ALLOCATED) {
692 /* Is there any real extent? - otherwise we overwrite
696 laarr[c].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED |
697 inode->i_sb->s_blocksize;
698 memset(&laarr[c].extLocation, 0x00,
699 sizeof(struct kernel_lb_addr));
707 endnum = startnum = ((count > 2) ? 2 : count);
709 /* if the current extent is in position 0,
710 swap it with the previous */
711 if (!c && count != 1) {
718 /* if the current block is located in an extent,
719 read the next extent */
720 etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 0);
722 laarr[c + 1].extLength = (etype << 30) | elen;
723 laarr[c + 1].extLocation = eloc;
731 /* if the current extent is not recorded but allocated, get the
732 * block in the extent corresponding to the requested block */
733 if ((laarr[c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30))
734 newblocknum = laarr[c].extLocation.logicalBlockNum + offset;
735 else { /* otherwise, allocate a new block */
736 if (iinfo->i_next_alloc_block == block)
737 goal = iinfo->i_next_alloc_goal;
740 if (!(goal = pgoal)) /* XXX: what was intended here? */
741 goal = iinfo->i_location.logicalBlockNum + 1;
744 newblocknum = udf_new_block(inode->i_sb, inode,
745 iinfo->i_location.partitionReferenceNum,
748 brelse(prev_epos.bh);
750 brelse(next_epos.bh);
755 iinfo->i_lenExtents += inode->i_sb->s_blocksize;
758 /* if the extent the requsted block is located in contains multiple
759 * blocks, split the extent into at most three extents. blocks prior
760 * to requested block, requested block, and blocks after requested
762 udf_split_extents(inode, &c, offset, newblocknum, laarr, &endnum);
764 #ifdef UDF_PREALLOCATE
765 /* We preallocate blocks only for regular files. It also makes sense
766 * for directories but there's a problem when to drop the
767 * preallocation. We might use some delayed work for that but I feel
768 * it's overengineering for a filesystem like UDF. */
769 if (S_ISREG(inode->i_mode))
770 udf_prealloc_extents(inode, c, lastblock, laarr, &endnum);
773 /* merge any continuous blocks in laarr */
774 udf_merge_extents(inode, laarr, &endnum);
776 /* write back the new extents, inserting new extents if the new number
777 * of extents is greater than the old number, and deleting extents if
778 * the new number of extents is less than the old number */
779 udf_update_extents(inode, laarr, startnum, endnum, &prev_epos);
781 brelse(prev_epos.bh);
783 brelse(next_epos.bh);
785 newblock = udf_get_pblock(inode->i_sb, newblocknum,
786 iinfo->i_location.partitionReferenceNum, 0);
792 iinfo->i_next_alloc_block = block;
793 iinfo->i_next_alloc_goal = newblocknum;
794 inode->i_ctime = current_fs_time(inode->i_sb);
797 udf_sync_inode(inode);
799 mark_inode_dirty(inode);
804 static void udf_split_extents(struct inode *inode, int *c, int offset,
806 struct kernel_long_ad laarr[EXTENT_MERGE_SIZE],
809 unsigned long blocksize = inode->i_sb->s_blocksize;
810 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits;
812 if ((laarr[*c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30) ||
813 (laarr[*c].extLength >> 30) ==
814 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) {
816 int blen = ((laarr[curr].extLength & UDF_EXTENT_LENGTH_MASK) +
817 blocksize - 1) >> blocksize_bits;
818 int8_t etype = (laarr[curr].extLength >> 30);
822 else if (!offset || blen == offset + 1) {
823 laarr[curr + 2] = laarr[curr + 1];
824 laarr[curr + 1] = laarr[curr];
826 laarr[curr + 3] = laarr[curr + 1];
827 laarr[curr + 2] = laarr[curr + 1] = laarr[curr];
831 if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30)) {
832 udf_free_blocks(inode->i_sb, inode,
833 &laarr[curr].extLocation,
835 laarr[curr].extLength =
836 EXT_NOT_RECORDED_NOT_ALLOCATED |
837 (offset << blocksize_bits);
838 laarr[curr].extLocation.logicalBlockNum = 0;
839 laarr[curr].extLocation.
840 partitionReferenceNum = 0;
842 laarr[curr].extLength = (etype << 30) |
843 (offset << blocksize_bits);
849 laarr[curr].extLocation.logicalBlockNum = newblocknum;
850 if (etype == (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))
851 laarr[curr].extLocation.partitionReferenceNum =
852 UDF_I(inode)->i_location.partitionReferenceNum;
853 laarr[curr].extLength = EXT_RECORDED_ALLOCATED |
857 if (blen != offset + 1) {
858 if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30))
859 laarr[curr].extLocation.logicalBlockNum +=
861 laarr[curr].extLength = (etype << 30) |
862 ((blen - (offset + 1)) << blocksize_bits);
869 static void udf_prealloc_extents(struct inode *inode, int c, int lastblock,
870 struct kernel_long_ad laarr[EXTENT_MERGE_SIZE],
873 int start, length = 0, currlength = 0, i;
875 if (*endnum >= (c + 1)) {
881 if ((laarr[c + 1].extLength >> 30) ==
882 (EXT_NOT_RECORDED_ALLOCATED >> 30)) {
884 length = currlength =
885 (((laarr[c + 1].extLength &
886 UDF_EXTENT_LENGTH_MASK) +
887 inode->i_sb->s_blocksize - 1) >>
888 inode->i_sb->s_blocksize_bits);
893 for (i = start + 1; i <= *endnum; i++) {
896 length += UDF_DEFAULT_PREALLOC_BLOCKS;
897 } else if ((laarr[i].extLength >> 30) ==
898 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) {
899 length += (((laarr[i].extLength &
900 UDF_EXTENT_LENGTH_MASK) +
901 inode->i_sb->s_blocksize - 1) >>
902 inode->i_sb->s_blocksize_bits);
908 int next = laarr[start].extLocation.logicalBlockNum +
909 (((laarr[start].extLength & UDF_EXTENT_LENGTH_MASK) +
910 inode->i_sb->s_blocksize - 1) >>
911 inode->i_sb->s_blocksize_bits);
912 int numalloc = udf_prealloc_blocks(inode->i_sb, inode,
913 laarr[start].extLocation.partitionReferenceNum,
914 next, (UDF_DEFAULT_PREALLOC_BLOCKS > length ?
915 length : UDF_DEFAULT_PREALLOC_BLOCKS) -
918 if (start == (c + 1))
919 laarr[start].extLength +=
921 inode->i_sb->s_blocksize_bits);
923 memmove(&laarr[c + 2], &laarr[c + 1],
924 sizeof(struct long_ad) * (*endnum - (c + 1)));
926 laarr[c + 1].extLocation.logicalBlockNum = next;
927 laarr[c + 1].extLocation.partitionReferenceNum =
928 laarr[c].extLocation.
929 partitionReferenceNum;
930 laarr[c + 1].extLength =
931 EXT_NOT_RECORDED_ALLOCATED |
933 inode->i_sb->s_blocksize_bits);
937 for (i = start + 1; numalloc && i < *endnum; i++) {
938 int elen = ((laarr[i].extLength &
939 UDF_EXTENT_LENGTH_MASK) +
940 inode->i_sb->s_blocksize - 1) >>
941 inode->i_sb->s_blocksize_bits;
943 if (elen > numalloc) {
944 laarr[i].extLength -=
946 inode->i_sb->s_blocksize_bits);
950 if (*endnum > (i + 1))
953 sizeof(struct long_ad) *
954 (*endnum - (i + 1)));
959 UDF_I(inode)->i_lenExtents +=
960 numalloc << inode->i_sb->s_blocksize_bits;
965 static void udf_merge_extents(struct inode *inode,
966 struct kernel_long_ad laarr[EXTENT_MERGE_SIZE],
970 unsigned long blocksize = inode->i_sb->s_blocksize;
971 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits;
973 for (i = 0; i < (*endnum - 1); i++) {
974 struct kernel_long_ad *li /*l[i]*/ = &laarr[i];
975 struct kernel_long_ad *lip1 /*l[i plus 1]*/ = &laarr[i + 1];
977 if (((li->extLength >> 30) == (lip1->extLength >> 30)) &&
978 (((li->extLength >> 30) ==
979 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) ||
980 ((lip1->extLocation.logicalBlockNum -
981 li->extLocation.logicalBlockNum) ==
982 (((li->extLength & UDF_EXTENT_LENGTH_MASK) +
983 blocksize - 1) >> blocksize_bits)))) {
985 if (((li->extLength & UDF_EXTENT_LENGTH_MASK) +
986 (lip1->extLength & UDF_EXTENT_LENGTH_MASK) +
987 blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) {
988 lip1->extLength = (lip1->extLength -
990 UDF_EXTENT_LENGTH_MASK) +
991 UDF_EXTENT_LENGTH_MASK) &
993 li->extLength = (li->extLength &
994 UDF_EXTENT_FLAG_MASK) +
995 (UDF_EXTENT_LENGTH_MASK + 1) -
997 lip1->extLocation.logicalBlockNum =
998 li->extLocation.logicalBlockNum +
1000 UDF_EXTENT_LENGTH_MASK) >>
1003 li->extLength = lip1->extLength +
1005 UDF_EXTENT_LENGTH_MASK) +
1006 blocksize - 1) & ~(blocksize - 1));
1007 if (*endnum > (i + 2))
1008 memmove(&laarr[i + 1], &laarr[i + 2],
1009 sizeof(struct long_ad) *
1010 (*endnum - (i + 2)));
1014 } else if (((li->extLength >> 30) ==
1015 (EXT_NOT_RECORDED_ALLOCATED >> 30)) &&
1016 ((lip1->extLength >> 30) ==
1017 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))) {
1018 udf_free_blocks(inode->i_sb, inode, &li->extLocation, 0,
1020 UDF_EXTENT_LENGTH_MASK) +
1021 blocksize - 1) >> blocksize_bits);
1022 li->extLocation.logicalBlockNum = 0;
1023 li->extLocation.partitionReferenceNum = 0;
1025 if (((li->extLength & UDF_EXTENT_LENGTH_MASK) +
1026 (lip1->extLength & UDF_EXTENT_LENGTH_MASK) +
1027 blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) {
1028 lip1->extLength = (lip1->extLength -
1030 UDF_EXTENT_LENGTH_MASK) +
1031 UDF_EXTENT_LENGTH_MASK) &
1033 li->extLength = (li->extLength &
1034 UDF_EXTENT_FLAG_MASK) +
1035 (UDF_EXTENT_LENGTH_MASK + 1) -
1038 li->extLength = lip1->extLength +
1040 UDF_EXTENT_LENGTH_MASK) +
1041 blocksize - 1) & ~(blocksize - 1));
1042 if (*endnum > (i + 2))
1043 memmove(&laarr[i + 1], &laarr[i + 2],
1044 sizeof(struct long_ad) *
1045 (*endnum - (i + 2)));
1049 } else if ((li->extLength >> 30) ==
1050 (EXT_NOT_RECORDED_ALLOCATED >> 30)) {
1051 udf_free_blocks(inode->i_sb, inode,
1052 &li->extLocation, 0,
1054 UDF_EXTENT_LENGTH_MASK) +
1055 blocksize - 1) >> blocksize_bits);
1056 li->extLocation.logicalBlockNum = 0;
1057 li->extLocation.partitionReferenceNum = 0;
1058 li->extLength = (li->extLength &
1059 UDF_EXTENT_LENGTH_MASK) |
1060 EXT_NOT_RECORDED_NOT_ALLOCATED;
1065 static void udf_update_extents(struct inode *inode,
1066 struct kernel_long_ad laarr[EXTENT_MERGE_SIZE],
1067 int startnum, int endnum,
1068 struct extent_position *epos)
1071 struct kernel_lb_addr tmploc;
1074 if (startnum > endnum) {
1075 for (i = 0; i < (startnum - endnum); i++)
1076 udf_delete_aext(inode, *epos, laarr[i].extLocation,
1077 laarr[i].extLength);
1078 } else if (startnum < endnum) {
1079 for (i = 0; i < (endnum - startnum); i++) {
1080 udf_insert_aext(inode, *epos, laarr[i].extLocation,
1081 laarr[i].extLength);
1082 udf_next_aext(inode, epos, &laarr[i].extLocation,
1083 &laarr[i].extLength, 1);
1088 for (i = start; i < endnum; i++) {
1089 udf_next_aext(inode, epos, &tmploc, &tmplen, 0);
1090 udf_write_aext(inode, epos, &laarr[i].extLocation,
1091 laarr[i].extLength, 1);
1095 struct buffer_head *udf_bread(struct inode *inode, int block,
1096 int create, int *err)
1098 struct buffer_head *bh = NULL;
1100 bh = udf_getblk(inode, block, create, err);
1104 if (buffer_uptodate(bh))
1107 ll_rw_block(READ, 1, &bh);
1110 if (buffer_uptodate(bh))
1118 int udf_setsize(struct inode *inode, loff_t newsize)
1121 struct udf_inode_info *iinfo;
1122 int bsize = 1 << inode->i_blkbits;
1124 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
1125 S_ISLNK(inode->i_mode)))
1127 if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
1130 iinfo = UDF_I(inode);
1131 if (newsize > inode->i_size) {
1132 down_write(&iinfo->i_data_sem);
1133 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
1135 (udf_file_entry_alloc_offset(inode) + newsize)) {
1136 err = udf_expand_file_adinicb(inode);
1139 down_write(&iinfo->i_data_sem);
1141 iinfo->i_lenAlloc = newsize;
1143 err = udf_extend_file(inode, newsize);
1145 up_write(&iinfo->i_data_sem);
1148 truncate_setsize(inode, newsize);
1149 up_write(&iinfo->i_data_sem);
1151 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
1152 down_write(&iinfo->i_data_sem);
1153 memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr + newsize,
1154 0x00, bsize - newsize -
1155 udf_file_entry_alloc_offset(inode));
1156 iinfo->i_lenAlloc = newsize;
1157 truncate_setsize(inode, newsize);
1158 up_write(&iinfo->i_data_sem);
1161 err = block_truncate_page(inode->i_mapping, newsize,
1165 down_write(&iinfo->i_data_sem);
1166 truncate_setsize(inode, newsize);
1167 udf_truncate_extents(inode);
1168 up_write(&iinfo->i_data_sem);
1171 inode->i_mtime = inode->i_ctime = current_fs_time(inode->i_sb);
1173 udf_sync_inode(inode);
1175 mark_inode_dirty(inode);
1180 * Maximum length of linked list formed by ICB hierarchy. The chosen number is
1181 * arbitrary - just that we hopefully don't limit any real use of rewritten
1182 * inode on write-once media but avoid looping for too long on corrupted media.
1184 #define UDF_MAX_ICB_NESTING 1024
1186 static void __udf_read_inode(struct inode *inode)
1188 struct buffer_head *bh = NULL;
1189 struct fileEntry *fe;
1191 struct udf_inode_info *iinfo = UDF_I(inode);
1192 unsigned int indirections = 0;
1196 * Set defaults, but the inode is still incomplete!
1197 * Note: get_new_inode() sets the following on a new inode:
1200 * i_flags = sb->s_flags
1202 * clean_inode(): zero fills and sets
1207 bh = udf_read_ptagged(inode->i_sb, &iinfo->i_location, 0, &ident);
1209 udf_err(inode->i_sb, "(ino %ld) failed !bh\n", inode->i_ino);
1210 make_bad_inode(inode);
1214 if (ident != TAG_IDENT_FE && ident != TAG_IDENT_EFE &&
1215 ident != TAG_IDENT_USE) {
1216 udf_err(inode->i_sb, "(ino %ld) failed ident=%d\n",
1217 inode->i_ino, ident);
1219 make_bad_inode(inode);
1223 fe = (struct fileEntry *)bh->b_data;
1225 if (fe->icbTag.strategyType == cpu_to_le16(4096)) {
1226 struct buffer_head *ibh;
1228 ibh = udf_read_ptagged(inode->i_sb, &iinfo->i_location, 1,
1230 if (ident == TAG_IDENT_IE && ibh) {
1231 struct kernel_lb_addr loc;
1232 struct indirectEntry *ie;
1234 ie = (struct indirectEntry *)ibh->b_data;
1235 loc = lelb_to_cpu(ie->indirectICB.extLocation);
1237 if (ie->indirectICB.extLength) {
1240 memcpy(&iinfo->i_location, &loc,
1241 sizeof(struct kernel_lb_addr));
1242 if (++indirections > UDF_MAX_ICB_NESTING) {
1243 udf_err(inode->i_sb,
1244 "too many ICBs in ICB hierarchy"
1245 " (max %d supported)\n",
1246 UDF_MAX_ICB_NESTING);
1247 make_bad_inode(inode);
1254 } else if (fe->icbTag.strategyType != cpu_to_le16(4)) {
1255 udf_err(inode->i_sb, "unsupported strategy type: %d\n",
1256 le16_to_cpu(fe->icbTag.strategyType));
1258 make_bad_inode(inode);
1261 udf_fill_inode(inode, bh);
1266 static void udf_fill_inode(struct inode *inode, struct buffer_head *bh)
1268 struct fileEntry *fe;
1269 struct extendedFileEntry *efe;
1271 struct udf_sb_info *sbi = UDF_SB(inode->i_sb);
1272 struct udf_inode_info *iinfo = UDF_I(inode);
1273 unsigned int link_count;
1274 int bs = inode->i_sb->s_blocksize;
1276 fe = (struct fileEntry *)bh->b_data;
1277 efe = (struct extendedFileEntry *)bh->b_data;
1279 if (fe->icbTag.strategyType == cpu_to_le16(4))
1280 iinfo->i_strat4096 = 0;
1281 else /* if (fe->icbTag.strategyType == cpu_to_le16(4096)) */
1282 iinfo->i_strat4096 = 1;
1284 iinfo->i_alloc_type = le16_to_cpu(fe->icbTag.flags) &
1285 ICBTAG_FLAG_AD_MASK;
1286 iinfo->i_unique = 0;
1287 iinfo->i_lenEAttr = 0;
1288 iinfo->i_lenExtents = 0;
1289 iinfo->i_lenAlloc = 0;
1290 iinfo->i_next_alloc_block = 0;
1291 iinfo->i_next_alloc_goal = 0;
1292 if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_EFE)) {
1295 if (udf_alloc_i_data(inode, bs -
1296 sizeof(struct extendedFileEntry))) {
1297 make_bad_inode(inode);
1300 memcpy(iinfo->i_ext.i_data,
1301 bh->b_data + sizeof(struct extendedFileEntry),
1302 bs - sizeof(struct extendedFileEntry));
1303 } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_FE)) {
1306 if (udf_alloc_i_data(inode, bs - sizeof(struct fileEntry))) {
1307 make_bad_inode(inode);
1310 memcpy(iinfo->i_ext.i_data,
1311 bh->b_data + sizeof(struct fileEntry),
1312 bs - sizeof(struct fileEntry));
1313 } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_USE)) {
1316 iinfo->i_lenAlloc = le32_to_cpu(
1317 ((struct unallocSpaceEntry *)bh->b_data)->
1319 if (udf_alloc_i_data(inode, bs -
1320 sizeof(struct unallocSpaceEntry))) {
1321 make_bad_inode(inode);
1324 memcpy(iinfo->i_ext.i_data,
1325 bh->b_data + sizeof(struct unallocSpaceEntry),
1326 bs - sizeof(struct unallocSpaceEntry));
1330 read_lock(&sbi->s_cred_lock);
1331 inode->i_uid = le32_to_cpu(fe->uid);
1332 if (inode->i_uid == -1 ||
1333 UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_IGNORE) ||
1334 UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_SET))
1335 inode->i_uid = UDF_SB(inode->i_sb)->s_uid;
1337 inode->i_gid = le32_to_cpu(fe->gid);
1338 if (inode->i_gid == -1 ||
1339 UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_IGNORE) ||
1340 UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_SET))
1341 inode->i_gid = UDF_SB(inode->i_sb)->s_gid;
1343 if (fe->icbTag.fileType != ICBTAG_FILE_TYPE_DIRECTORY &&
1344 sbi->s_fmode != UDF_INVALID_MODE)
1345 inode->i_mode = sbi->s_fmode;
1346 else if (fe->icbTag.fileType == ICBTAG_FILE_TYPE_DIRECTORY &&
1347 sbi->s_dmode != UDF_INVALID_MODE)
1348 inode->i_mode = sbi->s_dmode;
1350 inode->i_mode = udf_convert_permissions(fe);
1351 inode->i_mode &= ~sbi->s_umask;
1352 read_unlock(&sbi->s_cred_lock);
1354 link_count = le16_to_cpu(fe->fileLinkCount);
1357 set_nlink(inode, link_count);
1359 inode->i_size = le64_to_cpu(fe->informationLength);
1360 iinfo->i_lenExtents = inode->i_size;
1362 if (iinfo->i_efe == 0) {
1363 inode->i_blocks = le64_to_cpu(fe->logicalBlocksRecorded) <<
1364 (inode->i_sb->s_blocksize_bits - 9);
1366 if (!udf_disk_stamp_to_time(&inode->i_atime, fe->accessTime))
1367 inode->i_atime = sbi->s_record_time;
1369 if (!udf_disk_stamp_to_time(&inode->i_mtime,
1370 fe->modificationTime))
1371 inode->i_mtime = sbi->s_record_time;
1373 if (!udf_disk_stamp_to_time(&inode->i_ctime, fe->attrTime))
1374 inode->i_ctime = sbi->s_record_time;
1376 iinfo->i_unique = le64_to_cpu(fe->uniqueID);
1377 iinfo->i_lenEAttr = le32_to_cpu(fe->lengthExtendedAttr);
1378 iinfo->i_lenAlloc = le32_to_cpu(fe->lengthAllocDescs);
1379 offset = sizeof(struct fileEntry) + iinfo->i_lenEAttr;
1381 inode->i_blocks = le64_to_cpu(efe->logicalBlocksRecorded) <<
1382 (inode->i_sb->s_blocksize_bits - 9);
1384 if (!udf_disk_stamp_to_time(&inode->i_atime, efe->accessTime))
1385 inode->i_atime = sbi->s_record_time;
1387 if (!udf_disk_stamp_to_time(&inode->i_mtime,
1388 efe->modificationTime))
1389 inode->i_mtime = sbi->s_record_time;
1391 if (!udf_disk_stamp_to_time(&iinfo->i_crtime, efe->createTime))
1392 iinfo->i_crtime = sbi->s_record_time;
1394 if (!udf_disk_stamp_to_time(&inode->i_ctime, efe->attrTime))
1395 inode->i_ctime = sbi->s_record_time;
1397 iinfo->i_unique = le64_to_cpu(efe->uniqueID);
1398 iinfo->i_lenEAttr = le32_to_cpu(efe->lengthExtendedAttr);
1399 iinfo->i_lenAlloc = le32_to_cpu(efe->lengthAllocDescs);
1400 offset = sizeof(struct extendedFileEntry) +
1405 * Sanity check length of allocation descriptors and extended attrs to
1406 * avoid integer overflows
1408 if (iinfo->i_lenEAttr > bs || iinfo->i_lenAlloc > bs) {
1409 make_bad_inode(inode);
1412 /* Now do exact checks */
1413 if (udf_file_entry_alloc_offset(inode) + iinfo->i_lenAlloc > bs) {
1414 make_bad_inode(inode);
1417 /* Sanity checks for files in ICB so that we don't get confused later */
1418 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
1420 * For file in ICB data is stored in allocation descriptor
1421 * so sizes should match
1423 if (iinfo->i_lenAlloc != inode->i_size) {
1424 make_bad_inode(inode);
1427 /* File in ICB has to fit in there... */
1428 if (inode->i_size > bs - udf_file_entry_alloc_offset(inode)) {
1429 make_bad_inode(inode);
1434 switch (fe->icbTag.fileType) {
1435 case ICBTAG_FILE_TYPE_DIRECTORY:
1436 inode->i_op = &udf_dir_inode_operations;
1437 inode->i_fop = &udf_dir_operations;
1438 inode->i_mode |= S_IFDIR;
1441 case ICBTAG_FILE_TYPE_REALTIME:
1442 case ICBTAG_FILE_TYPE_REGULAR:
1443 case ICBTAG_FILE_TYPE_UNDEF:
1444 case ICBTAG_FILE_TYPE_VAT20:
1445 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
1446 inode->i_data.a_ops = &udf_adinicb_aops;
1448 inode->i_data.a_ops = &udf_aops;
1449 inode->i_op = &udf_file_inode_operations;
1450 inode->i_fop = &udf_file_operations;
1451 inode->i_mode |= S_IFREG;
1453 case ICBTAG_FILE_TYPE_BLOCK:
1454 inode->i_mode |= S_IFBLK;
1456 case ICBTAG_FILE_TYPE_CHAR:
1457 inode->i_mode |= S_IFCHR;
1459 case ICBTAG_FILE_TYPE_FIFO:
1460 init_special_inode(inode, inode->i_mode | S_IFIFO, 0);
1462 case ICBTAG_FILE_TYPE_SOCKET:
1463 init_special_inode(inode, inode->i_mode | S_IFSOCK, 0);
1465 case ICBTAG_FILE_TYPE_SYMLINK:
1466 inode->i_data.a_ops = &udf_symlink_aops;
1467 inode->i_op = &udf_symlink_inode_operations;
1468 inode->i_mode = S_IFLNK | S_IRWXUGO;
1470 case ICBTAG_FILE_TYPE_MAIN:
1471 udf_debug("METADATA FILE-----\n");
1473 case ICBTAG_FILE_TYPE_MIRROR:
1474 udf_debug("METADATA MIRROR FILE-----\n");
1476 case ICBTAG_FILE_TYPE_BITMAP:
1477 udf_debug("METADATA BITMAP FILE-----\n");
1480 udf_err(inode->i_sb, "(ino %ld) failed unknown file type=%d\n",
1481 inode->i_ino, fe->icbTag.fileType);
1482 make_bad_inode(inode);
1485 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
1486 struct deviceSpec *dsea =
1487 (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1);
1489 init_special_inode(inode, inode->i_mode,
1490 MKDEV(le32_to_cpu(dsea->majorDeviceIdent),
1491 le32_to_cpu(dsea->minorDeviceIdent)));
1492 /* Developer ID ??? */
1494 make_bad_inode(inode);
1498 static int udf_alloc_i_data(struct inode *inode, size_t size)
1500 struct udf_inode_info *iinfo = UDF_I(inode);
1501 iinfo->i_ext.i_data = kmalloc(size, GFP_KERNEL);
1503 if (!iinfo->i_ext.i_data) {
1504 udf_err(inode->i_sb, "(ino %ld) no free memory\n",
1512 static mode_t udf_convert_permissions(struct fileEntry *fe)
1515 uint32_t permissions;
1518 permissions = le32_to_cpu(fe->permissions);
1519 flags = le16_to_cpu(fe->icbTag.flags);
1521 mode = ((permissions) & S_IRWXO) |
1522 ((permissions >> 2) & S_IRWXG) |
1523 ((permissions >> 4) & S_IRWXU) |
1524 ((flags & ICBTAG_FLAG_SETUID) ? S_ISUID : 0) |
1525 ((flags & ICBTAG_FLAG_SETGID) ? S_ISGID : 0) |
1526 ((flags & ICBTAG_FLAG_STICKY) ? S_ISVTX : 0);
1531 int udf_write_inode(struct inode *inode, struct writeback_control *wbc)
1533 return udf_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL);
1536 static int udf_sync_inode(struct inode *inode)
1538 return udf_update_inode(inode, 1);
1541 static int udf_update_inode(struct inode *inode, int do_sync)
1543 struct buffer_head *bh = NULL;
1544 struct fileEntry *fe;
1545 struct extendedFileEntry *efe;
1550 struct udf_sb_info *sbi = UDF_SB(inode->i_sb);
1551 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits;
1552 struct udf_inode_info *iinfo = UDF_I(inode);
1554 bh = udf_tgetblk(inode->i_sb,
1555 udf_get_lb_pblock(inode->i_sb, &iinfo->i_location, 0));
1557 udf_debug("getblk failure\n");
1562 memset(bh->b_data, 0, inode->i_sb->s_blocksize);
1563 fe = (struct fileEntry *)bh->b_data;
1564 efe = (struct extendedFileEntry *)bh->b_data;
1567 struct unallocSpaceEntry *use =
1568 (struct unallocSpaceEntry *)bh->b_data;
1570 use->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc);
1571 memcpy(bh->b_data + sizeof(struct unallocSpaceEntry),
1572 iinfo->i_ext.i_data, inode->i_sb->s_blocksize -
1573 sizeof(struct unallocSpaceEntry));
1574 use->descTag.tagIdent = cpu_to_le16(TAG_IDENT_USE);
1575 use->descTag.tagLocation =
1576 cpu_to_le32(iinfo->i_location.logicalBlockNum);
1577 crclen = sizeof(struct unallocSpaceEntry) +
1578 iinfo->i_lenAlloc - sizeof(struct tag);
1579 use->descTag.descCRCLength = cpu_to_le16(crclen);
1580 use->descTag.descCRC = cpu_to_le16(crc_itu_t(0, (char *)use +
1583 use->descTag.tagChecksum = udf_tag_checksum(&use->descTag);
1588 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_FORGET))
1589 fe->uid = cpu_to_le32(-1);
1591 fe->uid = cpu_to_le32(inode->i_uid);
1593 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_FORGET))
1594 fe->gid = cpu_to_le32(-1);
1596 fe->gid = cpu_to_le32(inode->i_gid);
1598 udfperms = ((inode->i_mode & S_IRWXO)) |
1599 ((inode->i_mode & S_IRWXG) << 2) |
1600 ((inode->i_mode & S_IRWXU) << 4);
1602 udfperms |= (le32_to_cpu(fe->permissions) &
1603 (FE_PERM_O_DELETE | FE_PERM_O_CHATTR |
1604 FE_PERM_G_DELETE | FE_PERM_G_CHATTR |
1605 FE_PERM_U_DELETE | FE_PERM_U_CHATTR));
1606 fe->permissions = cpu_to_le32(udfperms);
1608 if (S_ISDIR(inode->i_mode))
1609 fe->fileLinkCount = cpu_to_le16(inode->i_nlink - 1);
1611 fe->fileLinkCount = cpu_to_le16(inode->i_nlink);
1613 fe->informationLength = cpu_to_le64(inode->i_size);
1615 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
1617 struct deviceSpec *dsea =
1618 (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1);
1620 dsea = (struct deviceSpec *)
1621 udf_add_extendedattr(inode,
1622 sizeof(struct deviceSpec) +
1623 sizeof(struct regid), 12, 0x3);
1624 dsea->attrType = cpu_to_le32(12);
1625 dsea->attrSubtype = 1;
1626 dsea->attrLength = cpu_to_le32(
1627 sizeof(struct deviceSpec) +
1628 sizeof(struct regid));
1629 dsea->impUseLength = cpu_to_le32(sizeof(struct regid));
1631 eid = (struct regid *)dsea->impUse;
1632 memset(eid, 0, sizeof(struct regid));
1633 strcpy(eid->ident, UDF_ID_DEVELOPER);
1634 eid->identSuffix[0] = UDF_OS_CLASS_UNIX;
1635 eid->identSuffix[1] = UDF_OS_ID_LINUX;
1636 dsea->majorDeviceIdent = cpu_to_le32(imajor(inode));
1637 dsea->minorDeviceIdent = cpu_to_le32(iminor(inode));
1640 if (iinfo->i_efe == 0) {
1641 memcpy(bh->b_data + sizeof(struct fileEntry),
1642 iinfo->i_ext.i_data,
1643 inode->i_sb->s_blocksize - sizeof(struct fileEntry));
1644 fe->logicalBlocksRecorded = cpu_to_le64(
1645 (inode->i_blocks + (1 << (blocksize_bits - 9)) - 1) >>
1646 (blocksize_bits - 9));
1648 udf_time_to_disk_stamp(&fe->accessTime, inode->i_atime);
1649 udf_time_to_disk_stamp(&fe->modificationTime, inode->i_mtime);
1650 udf_time_to_disk_stamp(&fe->attrTime, inode->i_ctime);
1651 memset(&(fe->impIdent), 0, sizeof(struct regid));
1652 strcpy(fe->impIdent.ident, UDF_ID_DEVELOPER);
1653 fe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1654 fe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1655 fe->uniqueID = cpu_to_le64(iinfo->i_unique);
1656 fe->lengthExtendedAttr = cpu_to_le32(iinfo->i_lenEAttr);
1657 fe->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc);
1658 fe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_FE);
1659 crclen = sizeof(struct fileEntry);
1661 memcpy(bh->b_data + sizeof(struct extendedFileEntry),
1662 iinfo->i_ext.i_data,
1663 inode->i_sb->s_blocksize -
1664 sizeof(struct extendedFileEntry));
1665 efe->objectSize = cpu_to_le64(inode->i_size);
1666 efe->logicalBlocksRecorded = cpu_to_le64(
1667 (inode->i_blocks + (1 << (blocksize_bits - 9)) - 1) >>
1668 (blocksize_bits - 9));
1670 if (iinfo->i_crtime.tv_sec > inode->i_atime.tv_sec ||
1671 (iinfo->i_crtime.tv_sec == inode->i_atime.tv_sec &&
1672 iinfo->i_crtime.tv_nsec > inode->i_atime.tv_nsec))
1673 iinfo->i_crtime = inode->i_atime;
1675 if (iinfo->i_crtime.tv_sec > inode->i_mtime.tv_sec ||
1676 (iinfo->i_crtime.tv_sec == inode->i_mtime.tv_sec &&
1677 iinfo->i_crtime.tv_nsec > inode->i_mtime.tv_nsec))
1678 iinfo->i_crtime = inode->i_mtime;
1680 if (iinfo->i_crtime.tv_sec > inode->i_ctime.tv_sec ||
1681 (iinfo->i_crtime.tv_sec == inode->i_ctime.tv_sec &&
1682 iinfo->i_crtime.tv_nsec > inode->i_ctime.tv_nsec))
1683 iinfo->i_crtime = inode->i_ctime;
1685 udf_time_to_disk_stamp(&efe->accessTime, inode->i_atime);
1686 udf_time_to_disk_stamp(&efe->modificationTime, inode->i_mtime);
1687 udf_time_to_disk_stamp(&efe->createTime, iinfo->i_crtime);
1688 udf_time_to_disk_stamp(&efe->attrTime, inode->i_ctime);
1690 memset(&(efe->impIdent), 0, sizeof(struct regid));
1691 strcpy(efe->impIdent.ident, UDF_ID_DEVELOPER);
1692 efe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1693 efe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1694 efe->uniqueID = cpu_to_le64(iinfo->i_unique);
1695 efe->lengthExtendedAttr = cpu_to_le32(iinfo->i_lenEAttr);
1696 efe->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc);
1697 efe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_EFE);
1698 crclen = sizeof(struct extendedFileEntry);
1700 if (iinfo->i_strat4096) {
1701 fe->icbTag.strategyType = cpu_to_le16(4096);
1702 fe->icbTag.strategyParameter = cpu_to_le16(1);
1703 fe->icbTag.numEntries = cpu_to_le16(2);
1705 fe->icbTag.strategyType = cpu_to_le16(4);
1706 fe->icbTag.numEntries = cpu_to_le16(1);
1709 if (S_ISDIR(inode->i_mode))
1710 fe->icbTag.fileType = ICBTAG_FILE_TYPE_DIRECTORY;
1711 else if (S_ISREG(inode->i_mode))
1712 fe->icbTag.fileType = ICBTAG_FILE_TYPE_REGULAR;
1713 else if (S_ISLNK(inode->i_mode))
1714 fe->icbTag.fileType = ICBTAG_FILE_TYPE_SYMLINK;
1715 else if (S_ISBLK(inode->i_mode))
1716 fe->icbTag.fileType = ICBTAG_FILE_TYPE_BLOCK;
1717 else if (S_ISCHR(inode->i_mode))
1718 fe->icbTag.fileType = ICBTAG_FILE_TYPE_CHAR;
1719 else if (S_ISFIFO(inode->i_mode))
1720 fe->icbTag.fileType = ICBTAG_FILE_TYPE_FIFO;
1721 else if (S_ISSOCK(inode->i_mode))
1722 fe->icbTag.fileType = ICBTAG_FILE_TYPE_SOCKET;
1724 icbflags = iinfo->i_alloc_type |
1725 ((inode->i_mode & S_ISUID) ? ICBTAG_FLAG_SETUID : 0) |
1726 ((inode->i_mode & S_ISGID) ? ICBTAG_FLAG_SETGID : 0) |
1727 ((inode->i_mode & S_ISVTX) ? ICBTAG_FLAG_STICKY : 0) |
1728 (le16_to_cpu(fe->icbTag.flags) &
1729 ~(ICBTAG_FLAG_AD_MASK | ICBTAG_FLAG_SETUID |
1730 ICBTAG_FLAG_SETGID | ICBTAG_FLAG_STICKY));
1732 fe->icbTag.flags = cpu_to_le16(icbflags);
1733 if (sbi->s_udfrev >= 0x0200)
1734 fe->descTag.descVersion = cpu_to_le16(3);
1736 fe->descTag.descVersion = cpu_to_le16(2);
1737 fe->descTag.tagSerialNum = cpu_to_le16(sbi->s_serial_number);
1738 fe->descTag.tagLocation = cpu_to_le32(
1739 iinfo->i_location.logicalBlockNum);
1740 crclen += iinfo->i_lenEAttr + iinfo->i_lenAlloc - sizeof(struct tag);
1741 fe->descTag.descCRCLength = cpu_to_le16(crclen);
1742 fe->descTag.descCRC = cpu_to_le16(crc_itu_t(0, (char *)fe + sizeof(struct tag),
1744 fe->descTag.tagChecksum = udf_tag_checksum(&fe->descTag);
1747 set_buffer_uptodate(bh);
1750 /* write the data blocks */
1751 mark_buffer_dirty(bh);
1753 sync_dirty_buffer(bh);
1754 if (buffer_write_io_error(bh)) {
1755 udf_warn(inode->i_sb, "IO error syncing udf inode [%08lx]\n",
1765 struct inode *udf_iget(struct super_block *sb, struct kernel_lb_addr *ino)
1767 unsigned long block = udf_get_lb_pblock(sb, ino, 0);
1768 struct inode *inode = iget_locked(sb, block);
1773 if (inode->i_state & I_NEW) {
1774 memcpy(&UDF_I(inode)->i_location, ino, sizeof(struct kernel_lb_addr));
1775 __udf_read_inode(inode);
1776 unlock_new_inode(inode);
1779 if (is_bad_inode(inode))
1782 if (ino->logicalBlockNum >= UDF_SB(sb)->
1783 s_partmaps[ino->partitionReferenceNum].s_partition_len) {
1784 udf_debug("block=%d, partition=%d out of range\n",
1785 ino->logicalBlockNum, ino->partitionReferenceNum);
1786 make_bad_inode(inode);
1797 int udf_add_aext(struct inode *inode, struct extent_position *epos,
1798 struct kernel_lb_addr *eloc, uint32_t elen, int inc)
1801 struct short_ad *sad = NULL;
1802 struct long_ad *lad = NULL;
1803 struct allocExtDesc *aed;
1805 struct udf_inode_info *iinfo = UDF_I(inode);
1808 ptr = iinfo->i_ext.i_data + epos->offset -
1809 udf_file_entry_alloc_offset(inode) +
1812 ptr = epos->bh->b_data + epos->offset;
1814 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
1815 adsize = sizeof(struct short_ad);
1816 else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
1817 adsize = sizeof(struct long_ad);
1821 if (epos->offset + (2 * adsize) > inode->i_sb->s_blocksize) {
1822 unsigned char *sptr, *dptr;
1823 struct buffer_head *nbh;
1825 struct kernel_lb_addr obloc = epos->block;
1827 epos->block.logicalBlockNum = udf_new_block(inode->i_sb, NULL,
1828 obloc.partitionReferenceNum,
1829 obloc.logicalBlockNum, &err);
1830 if (!epos->block.logicalBlockNum)
1832 nbh = udf_tgetblk(inode->i_sb, udf_get_lb_pblock(inode->i_sb,
1838 memset(nbh->b_data, 0x00, inode->i_sb->s_blocksize);
1839 set_buffer_uptodate(nbh);
1841 mark_buffer_dirty_inode(nbh, inode);
1843 aed = (struct allocExtDesc *)(nbh->b_data);
1844 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT))
1845 aed->previousAllocExtLocation =
1846 cpu_to_le32(obloc.logicalBlockNum);
1847 if (epos->offset + adsize > inode->i_sb->s_blocksize) {
1848 loffset = epos->offset;
1849 aed->lengthAllocDescs = cpu_to_le32(adsize);
1850 sptr = ptr - adsize;
1851 dptr = nbh->b_data + sizeof(struct allocExtDesc);
1852 memcpy(dptr, sptr, adsize);
1853 epos->offset = sizeof(struct allocExtDesc) + adsize;
1855 loffset = epos->offset + adsize;
1856 aed->lengthAllocDescs = cpu_to_le32(0);
1858 epos->offset = sizeof(struct allocExtDesc);
1861 aed = (struct allocExtDesc *)epos->bh->b_data;
1862 le32_add_cpu(&aed->lengthAllocDescs, adsize);
1864 iinfo->i_lenAlloc += adsize;
1865 mark_inode_dirty(inode);
1868 if (UDF_SB(inode->i_sb)->s_udfrev >= 0x0200)
1869 udf_new_tag(nbh->b_data, TAG_IDENT_AED, 3, 1,
1870 epos->block.logicalBlockNum, sizeof(struct tag));
1872 udf_new_tag(nbh->b_data, TAG_IDENT_AED, 2, 1,
1873 epos->block.logicalBlockNum, sizeof(struct tag));
1874 switch (iinfo->i_alloc_type) {
1875 case ICBTAG_FLAG_AD_SHORT:
1876 sad = (struct short_ad *)sptr;
1877 sad->extLength = cpu_to_le32(EXT_NEXT_EXTENT_ALLOCDECS |
1878 inode->i_sb->s_blocksize);
1880 cpu_to_le32(epos->block.logicalBlockNum);
1882 case ICBTAG_FLAG_AD_LONG:
1883 lad = (struct long_ad *)sptr;
1884 lad->extLength = cpu_to_le32(EXT_NEXT_EXTENT_ALLOCDECS |
1885 inode->i_sb->s_blocksize);
1886 lad->extLocation = cpu_to_lelb(epos->block);
1887 memset(lad->impUse, 0x00, sizeof(lad->impUse));
1891 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
1892 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201)
1893 udf_update_tag(epos->bh->b_data, loffset);
1895 udf_update_tag(epos->bh->b_data,
1896 sizeof(struct allocExtDesc));
1897 mark_buffer_dirty_inode(epos->bh, inode);
1900 mark_inode_dirty(inode);
1905 udf_write_aext(inode, epos, eloc, elen, inc);
1908 iinfo->i_lenAlloc += adsize;
1909 mark_inode_dirty(inode);
1911 aed = (struct allocExtDesc *)epos->bh->b_data;
1912 le32_add_cpu(&aed->lengthAllocDescs, adsize);
1913 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
1914 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201)
1915 udf_update_tag(epos->bh->b_data,
1916 epos->offset + (inc ? 0 : adsize));
1918 udf_update_tag(epos->bh->b_data,
1919 sizeof(struct allocExtDesc));
1920 mark_buffer_dirty_inode(epos->bh, inode);
1926 void udf_write_aext(struct inode *inode, struct extent_position *epos,
1927 struct kernel_lb_addr *eloc, uint32_t elen, int inc)
1931 struct short_ad *sad;
1932 struct long_ad *lad;
1933 struct udf_inode_info *iinfo = UDF_I(inode);
1936 ptr = iinfo->i_ext.i_data + epos->offset -
1937 udf_file_entry_alloc_offset(inode) +
1940 ptr = epos->bh->b_data + epos->offset;
1942 switch (iinfo->i_alloc_type) {
1943 case ICBTAG_FLAG_AD_SHORT:
1944 sad = (struct short_ad *)ptr;
1945 sad->extLength = cpu_to_le32(elen);
1946 sad->extPosition = cpu_to_le32(eloc->logicalBlockNum);
1947 adsize = sizeof(struct short_ad);
1949 case ICBTAG_FLAG_AD_LONG:
1950 lad = (struct long_ad *)ptr;
1951 lad->extLength = cpu_to_le32(elen);
1952 lad->extLocation = cpu_to_lelb(*eloc);
1953 memset(lad->impUse, 0x00, sizeof(lad->impUse));
1954 adsize = sizeof(struct long_ad);
1961 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
1962 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) {
1963 struct allocExtDesc *aed =
1964 (struct allocExtDesc *)epos->bh->b_data;
1965 udf_update_tag(epos->bh->b_data,
1966 le32_to_cpu(aed->lengthAllocDescs) +
1967 sizeof(struct allocExtDesc));
1969 mark_buffer_dirty_inode(epos->bh, inode);
1971 mark_inode_dirty(inode);
1975 epos->offset += adsize;
1978 int8_t udf_next_aext(struct inode *inode, struct extent_position *epos,
1979 struct kernel_lb_addr *eloc, uint32_t *elen, int inc)
1983 while ((etype = udf_current_aext(inode, epos, eloc, elen, inc)) ==
1984 (EXT_NEXT_EXTENT_ALLOCDECS >> 30)) {
1986 epos->block = *eloc;
1987 epos->offset = sizeof(struct allocExtDesc);
1989 block = udf_get_lb_pblock(inode->i_sb, &epos->block, 0);
1990 epos->bh = udf_tread(inode->i_sb, block);
1992 udf_debug("reading block %d failed!\n", block);
2000 int8_t udf_current_aext(struct inode *inode, struct extent_position *epos,
2001 struct kernel_lb_addr *eloc, uint32_t *elen, int inc)
2006 struct short_ad *sad;
2007 struct long_ad *lad;
2008 struct udf_inode_info *iinfo = UDF_I(inode);
2012 epos->offset = udf_file_entry_alloc_offset(inode);
2013 ptr = iinfo->i_ext.i_data + epos->offset -
2014 udf_file_entry_alloc_offset(inode) +
2016 alen = udf_file_entry_alloc_offset(inode) +
2020 epos->offset = sizeof(struct allocExtDesc);
2021 ptr = epos->bh->b_data + epos->offset;
2022 alen = sizeof(struct allocExtDesc) +
2023 le32_to_cpu(((struct allocExtDesc *)epos->bh->b_data)->
2027 switch (iinfo->i_alloc_type) {
2028 case ICBTAG_FLAG_AD_SHORT:
2029 sad = udf_get_fileshortad(ptr, alen, &epos->offset, inc);
2032 etype = le32_to_cpu(sad->extLength) >> 30;
2033 eloc->logicalBlockNum = le32_to_cpu(sad->extPosition);
2034 eloc->partitionReferenceNum =
2035 iinfo->i_location.partitionReferenceNum;
2036 *elen = le32_to_cpu(sad->extLength) & UDF_EXTENT_LENGTH_MASK;
2038 case ICBTAG_FLAG_AD_LONG:
2039 lad = udf_get_filelongad(ptr, alen, &epos->offset, inc);
2042 etype = le32_to_cpu(lad->extLength) >> 30;
2043 *eloc = lelb_to_cpu(lad->extLocation);
2044 *elen = le32_to_cpu(lad->extLength) & UDF_EXTENT_LENGTH_MASK;
2047 udf_debug("alloc_type = %d unsupported\n", iinfo->i_alloc_type);
2054 static int8_t udf_insert_aext(struct inode *inode, struct extent_position epos,
2055 struct kernel_lb_addr neloc, uint32_t nelen)
2057 struct kernel_lb_addr oeloc;
2064 while ((etype = udf_next_aext(inode, &epos, &oeloc, &oelen, 0)) != -1) {
2065 udf_write_aext(inode, &epos, &neloc, nelen, 1);
2067 nelen = (etype << 30) | oelen;
2069 udf_add_aext(inode, &epos, &neloc, nelen, 1);
2072 return (nelen >> 30);
2075 int8_t udf_delete_aext(struct inode *inode, struct extent_position epos,
2076 struct kernel_lb_addr eloc, uint32_t elen)
2078 struct extent_position oepos;
2081 struct allocExtDesc *aed;
2082 struct udf_inode_info *iinfo;
2089 iinfo = UDF_I(inode);
2090 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
2091 adsize = sizeof(struct short_ad);
2092 else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
2093 adsize = sizeof(struct long_ad);
2098 if (udf_next_aext(inode, &epos, &eloc, &elen, 1) == -1)
2101 while ((etype = udf_next_aext(inode, &epos, &eloc, &elen, 1)) != -1) {
2102 udf_write_aext(inode, &oepos, &eloc, (etype << 30) | elen, 1);
2103 if (oepos.bh != epos.bh) {
2104 oepos.block = epos.block;
2108 oepos.offset = epos.offset - adsize;
2111 memset(&eloc, 0x00, sizeof(struct kernel_lb_addr));
2114 if (epos.bh != oepos.bh) {
2115 udf_free_blocks(inode->i_sb, inode, &epos.block, 0, 1);
2116 udf_write_aext(inode, &oepos, &eloc, elen, 1);
2117 udf_write_aext(inode, &oepos, &eloc, elen, 1);
2119 iinfo->i_lenAlloc -= (adsize * 2);
2120 mark_inode_dirty(inode);
2122 aed = (struct allocExtDesc *)oepos.bh->b_data;
2123 le32_add_cpu(&aed->lengthAllocDescs, -(2 * adsize));
2124 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
2125 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201)
2126 udf_update_tag(oepos.bh->b_data,
2127 oepos.offset - (2 * adsize));
2129 udf_update_tag(oepos.bh->b_data,
2130 sizeof(struct allocExtDesc));
2131 mark_buffer_dirty_inode(oepos.bh, inode);
2134 udf_write_aext(inode, &oepos, &eloc, elen, 1);
2136 iinfo->i_lenAlloc -= adsize;
2137 mark_inode_dirty(inode);
2139 aed = (struct allocExtDesc *)oepos.bh->b_data;
2140 le32_add_cpu(&aed->lengthAllocDescs, -adsize);
2141 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
2142 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201)
2143 udf_update_tag(oepos.bh->b_data,
2144 epos.offset - adsize);
2146 udf_update_tag(oepos.bh->b_data,
2147 sizeof(struct allocExtDesc));
2148 mark_buffer_dirty_inode(oepos.bh, inode);
2155 return (elen >> 30);
2158 int8_t inode_bmap(struct inode *inode, sector_t block,
2159 struct extent_position *pos, struct kernel_lb_addr *eloc,
2160 uint32_t *elen, sector_t *offset)
2162 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits;
2163 loff_t lbcount = 0, bcount =
2164 (loff_t) block << blocksize_bits;
2166 struct udf_inode_info *iinfo;
2168 iinfo = UDF_I(inode);
2170 pos->block = iinfo->i_location;
2175 etype = udf_next_aext(inode, pos, eloc, elen, 1);
2177 *offset = (bcount - lbcount) >> blocksize_bits;
2178 iinfo->i_lenExtents = lbcount;
2182 } while (lbcount <= bcount);
2184 *offset = (bcount + *elen - lbcount) >> blocksize_bits;
2189 long udf_block_map(struct inode *inode, sector_t block)
2191 struct kernel_lb_addr eloc;
2194 struct extent_position epos = {};
2197 down_read(&UDF_I(inode)->i_data_sem);
2199 if (inode_bmap(inode, block, &epos, &eloc, &elen, &offset) ==
2200 (EXT_RECORDED_ALLOCATED >> 30))
2201 ret = udf_get_lb_pblock(inode->i_sb, &eloc, offset);
2205 up_read(&UDF_I(inode)->i_data_sem);
2208 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_VARCONV))
2209 return udf_fixed_to_variable(ret);