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/writeback.h>
37 #include <linux/slab.h>
38 #include <linux/crc-itu-t.h>
39 #include <linux/mpage.h>
40 #include <linux/uio.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 umode_t udf_convert_permissions(struct fileEntry *);
52 static int udf_update_inode(struct inode *, int);
53 static int udf_sync_inode(struct inode *inode);
54 static int udf_alloc_i_data(struct inode *inode, size_t size);
55 static sector_t inode_getblk(struct inode *, sector_t, int *, int *);
56 static int8_t udf_insert_aext(struct inode *, struct extent_position,
57 struct kernel_lb_addr, uint32_t);
58 static void udf_split_extents(struct inode *, int *, int, int,
59 struct kernel_long_ad[EXTENT_MERGE_SIZE], int *);
60 static void udf_prealloc_extents(struct inode *, int, int,
61 struct kernel_long_ad[EXTENT_MERGE_SIZE], int *);
62 static void udf_merge_extents(struct inode *,
63 struct kernel_long_ad[EXTENT_MERGE_SIZE], int *);
64 static void udf_update_extents(struct inode *,
65 struct kernel_long_ad[EXTENT_MERGE_SIZE], int, int,
66 struct extent_position *);
67 static int udf_get_block(struct inode *, sector_t, struct buffer_head *, int);
69 static void __udf_clear_extent_cache(struct inode *inode)
71 struct udf_inode_info *iinfo = UDF_I(inode);
73 if (iinfo->cached_extent.lstart != -1) {
74 brelse(iinfo->cached_extent.epos.bh);
75 iinfo->cached_extent.lstart = -1;
79 /* Invalidate extent cache */
80 static void udf_clear_extent_cache(struct inode *inode)
82 struct udf_inode_info *iinfo = UDF_I(inode);
84 spin_lock(&iinfo->i_extent_cache_lock);
85 __udf_clear_extent_cache(inode);
86 spin_unlock(&iinfo->i_extent_cache_lock);
89 /* Return contents of extent cache */
90 static int udf_read_extent_cache(struct inode *inode, loff_t bcount,
91 loff_t *lbcount, struct extent_position *pos)
93 struct udf_inode_info *iinfo = UDF_I(inode);
96 spin_lock(&iinfo->i_extent_cache_lock);
97 if ((iinfo->cached_extent.lstart <= bcount) &&
98 (iinfo->cached_extent.lstart != -1)) {
100 *lbcount = iinfo->cached_extent.lstart;
101 memcpy(pos, &iinfo->cached_extent.epos,
102 sizeof(struct extent_position));
107 spin_unlock(&iinfo->i_extent_cache_lock);
111 /* Add extent to extent cache */
112 static void udf_update_extent_cache(struct inode *inode, loff_t estart,
113 struct extent_position *pos, int next_epos)
115 struct udf_inode_info *iinfo = UDF_I(inode);
117 spin_lock(&iinfo->i_extent_cache_lock);
118 /* Invalidate previously cached extent */
119 __udf_clear_extent_cache(inode);
122 memcpy(&iinfo->cached_extent.epos, pos,
123 sizeof(struct extent_position));
124 iinfo->cached_extent.lstart = estart;
126 switch (iinfo->i_alloc_type) {
127 case ICBTAG_FLAG_AD_SHORT:
128 iinfo->cached_extent.epos.offset -=
129 sizeof(struct short_ad);
131 case ICBTAG_FLAG_AD_LONG:
132 iinfo->cached_extent.epos.offset -=
133 sizeof(struct long_ad);
135 spin_unlock(&iinfo->i_extent_cache_lock);
138 void udf_evict_inode(struct inode *inode)
140 struct udf_inode_info *iinfo = UDF_I(inode);
143 if (!is_bad_inode(inode)) {
144 if (!inode->i_nlink) {
146 udf_setsize(inode, 0);
147 udf_update_inode(inode, IS_SYNC(inode));
149 if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB &&
150 inode->i_size != iinfo->i_lenExtents) {
151 udf_warn(inode->i_sb,
152 "Inode %lu (mode %o) has inode size %llu different from extent length %llu. Filesystem need not be standards compliant.\n",
153 inode->i_ino, inode->i_mode,
154 (unsigned long long)inode->i_size,
155 (unsigned long long)iinfo->i_lenExtents);
158 truncate_inode_pages_final(&inode->i_data);
159 invalidate_inode_buffers(inode);
161 kfree(iinfo->i_ext.i_data);
162 iinfo->i_ext.i_data = NULL;
163 udf_clear_extent_cache(inode);
165 udf_free_inode(inode);
169 static void udf_write_failed(struct address_space *mapping, loff_t to)
171 struct inode *inode = mapping->host;
172 struct udf_inode_info *iinfo = UDF_I(inode);
173 loff_t isize = inode->i_size;
176 truncate_pagecache(inode, isize);
177 if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
178 down_write(&iinfo->i_data_sem);
179 udf_clear_extent_cache(inode);
180 udf_truncate_extents(inode);
181 up_write(&iinfo->i_data_sem);
186 static int udf_writepage(struct page *page, struct writeback_control *wbc)
188 return block_write_full_page(page, udf_get_block, wbc);
191 static int udf_writepages(struct address_space *mapping,
192 struct writeback_control *wbc)
194 return mpage_writepages(mapping, wbc, udf_get_block);
197 static int udf_readpage(struct file *file, struct page *page)
199 return mpage_readpage(page, udf_get_block);
202 static int udf_readpages(struct file *file, struct address_space *mapping,
203 struct list_head *pages, unsigned nr_pages)
205 return mpage_readpages(mapping, pages, nr_pages, udf_get_block);
208 static int udf_write_begin(struct file *file, struct address_space *mapping,
209 loff_t pos, unsigned len, unsigned flags,
210 struct page **pagep, void **fsdata)
214 ret = block_write_begin(mapping, pos, len, flags, pagep, udf_get_block);
216 udf_write_failed(mapping, pos + len);
220 static ssize_t udf_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
222 struct file *file = iocb->ki_filp;
223 struct address_space *mapping = file->f_mapping;
224 struct inode *inode = mapping->host;
225 size_t count = iov_iter_count(iter);
228 ret = blockdev_direct_IO(iocb, inode, iter, udf_get_block);
229 if (unlikely(ret < 0 && iov_iter_rw(iter) == WRITE))
230 udf_write_failed(mapping, iocb->ki_pos + count);
234 static sector_t udf_bmap(struct address_space *mapping, sector_t block)
236 return generic_block_bmap(mapping, block, udf_get_block);
239 const struct address_space_operations udf_aops = {
240 .readpage = udf_readpage,
241 .readpages = udf_readpages,
242 .writepage = udf_writepage,
243 .writepages = udf_writepages,
244 .write_begin = udf_write_begin,
245 .write_end = generic_write_end,
246 .direct_IO = udf_direct_IO,
251 * Expand file stored in ICB to a normal one-block-file
253 * This function requires i_data_sem for writing and releases it.
254 * This function requires i_mutex held
256 int udf_expand_file_adinicb(struct inode *inode)
260 struct udf_inode_info *iinfo = UDF_I(inode);
263 WARN_ON_ONCE(!inode_is_locked(inode));
264 if (!iinfo->i_lenAlloc) {
265 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))
266 iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT;
268 iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG;
269 /* from now on we have normal address_space methods */
270 inode->i_data.a_ops = &udf_aops;
271 up_write(&iinfo->i_data_sem);
272 mark_inode_dirty(inode);
276 * Release i_data_sem so that we can lock a page - page lock ranks
277 * above i_data_sem. i_mutex still protects us against file changes.
279 up_write(&iinfo->i_data_sem);
281 page = find_or_create_page(inode->i_mapping, 0, GFP_NOFS);
285 if (!PageUptodate(page)) {
287 memset(kaddr + iinfo->i_lenAlloc, 0x00,
288 PAGE_SIZE - iinfo->i_lenAlloc);
289 memcpy(kaddr, iinfo->i_ext.i_data + iinfo->i_lenEAttr,
291 flush_dcache_page(page);
292 SetPageUptodate(page);
295 down_write(&iinfo->i_data_sem);
296 memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr, 0x00,
298 iinfo->i_lenAlloc = 0;
299 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))
300 iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT;
302 iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG;
303 /* from now on we have normal address_space methods */
304 inode->i_data.a_ops = &udf_aops;
305 set_page_dirty(page);
307 up_write(&iinfo->i_data_sem);
308 err = filemap_fdatawrite(inode->i_mapping);
310 /* Restore everything back so that we don't lose data... */
313 down_write(&iinfo->i_data_sem);
314 memcpy(iinfo->i_ext.i_data + iinfo->i_lenEAttr, kaddr,
318 iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB;
319 inode->i_data.a_ops = &udf_adinicb_aops;
320 iinfo->i_lenAlloc = inode->i_size;
321 up_write(&iinfo->i_data_sem);
324 mark_inode_dirty(inode);
329 struct buffer_head *udf_expand_dir_adinicb(struct inode *inode, int *block,
333 struct buffer_head *dbh = NULL;
334 struct kernel_lb_addr eloc;
336 struct extent_position epos;
338 struct udf_fileident_bh sfibh, dfibh;
339 loff_t f_pos = udf_ext0_offset(inode);
340 int size = udf_ext0_offset(inode) + inode->i_size;
341 struct fileIdentDesc cfi, *sfi, *dfi;
342 struct udf_inode_info *iinfo = UDF_I(inode);
344 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))
345 alloctype = ICBTAG_FLAG_AD_SHORT;
347 alloctype = ICBTAG_FLAG_AD_LONG;
349 if (!inode->i_size) {
350 iinfo->i_alloc_type = alloctype;
351 mark_inode_dirty(inode);
355 /* alloc block, and copy data to it */
356 *block = udf_new_block(inode->i_sb, inode,
357 iinfo->i_location.partitionReferenceNum,
358 iinfo->i_location.logicalBlockNum, err);
361 newblock = udf_get_pblock(inode->i_sb, *block,
362 iinfo->i_location.partitionReferenceNum,
366 dbh = udf_tgetblk(inode->i_sb, newblock);
370 memset(dbh->b_data, 0x00, inode->i_sb->s_blocksize);
371 set_buffer_uptodate(dbh);
373 mark_buffer_dirty_inode(dbh, inode);
375 sfibh.soffset = sfibh.eoffset =
376 f_pos & (inode->i_sb->s_blocksize - 1);
377 sfibh.sbh = sfibh.ebh = NULL;
378 dfibh.soffset = dfibh.eoffset = 0;
379 dfibh.sbh = dfibh.ebh = dbh;
380 while (f_pos < size) {
381 iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB;
382 sfi = udf_fileident_read(inode, &f_pos, &sfibh, &cfi, NULL,
388 iinfo->i_alloc_type = alloctype;
389 sfi->descTag.tagLocation = cpu_to_le32(*block);
390 dfibh.soffset = dfibh.eoffset;
391 dfibh.eoffset += (sfibh.eoffset - sfibh.soffset);
392 dfi = (struct fileIdentDesc *)(dbh->b_data + dfibh.soffset);
393 if (udf_write_fi(inode, sfi, dfi, &dfibh, sfi->impUse,
395 le16_to_cpu(sfi->lengthOfImpUse))) {
396 iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB;
401 mark_buffer_dirty_inode(dbh, inode);
403 memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr, 0,
405 iinfo->i_lenAlloc = 0;
406 eloc.logicalBlockNum = *block;
407 eloc.partitionReferenceNum =
408 iinfo->i_location.partitionReferenceNum;
409 iinfo->i_lenExtents = inode->i_size;
411 epos.block = iinfo->i_location;
412 epos.offset = udf_file_entry_alloc_offset(inode);
413 udf_add_aext(inode, &epos, &eloc, inode->i_size, 0);
417 mark_inode_dirty(inode);
421 static int udf_get_block(struct inode *inode, sector_t block,
422 struct buffer_head *bh_result, int create)
426 struct udf_inode_info *iinfo;
429 phys = udf_block_map(inode, block);
431 map_bh(bh_result, inode->i_sb, phys);
437 iinfo = UDF_I(inode);
439 down_write(&iinfo->i_data_sem);
440 if (block == iinfo->i_next_alloc_block + 1) {
441 iinfo->i_next_alloc_block++;
442 iinfo->i_next_alloc_goal++;
445 udf_clear_extent_cache(inode);
446 phys = inode_getblk(inode, block, &err, &new);
451 set_buffer_new(bh_result);
452 map_bh(bh_result, inode->i_sb, phys);
455 up_write(&iinfo->i_data_sem);
459 static struct buffer_head *udf_getblk(struct inode *inode, long block,
460 int create, int *err)
462 struct buffer_head *bh;
463 struct buffer_head dummy;
466 dummy.b_blocknr = -1000;
467 *err = udf_get_block(inode, block, &dummy, create);
468 if (!*err && buffer_mapped(&dummy)) {
469 bh = sb_getblk(inode->i_sb, dummy.b_blocknr);
470 if (buffer_new(&dummy)) {
472 memset(bh->b_data, 0x00, inode->i_sb->s_blocksize);
473 set_buffer_uptodate(bh);
475 mark_buffer_dirty_inode(bh, inode);
483 /* Extend the file with new blocks totaling 'new_block_bytes',
484 * return the number of extents added
486 static int udf_do_extend_file(struct inode *inode,
487 struct extent_position *last_pos,
488 struct kernel_long_ad *last_ext,
489 loff_t new_block_bytes)
492 int count = 0, fake = !(last_ext->extLength & UDF_EXTENT_LENGTH_MASK);
493 struct super_block *sb = inode->i_sb;
494 struct kernel_lb_addr prealloc_loc = {};
495 int prealloc_len = 0;
496 struct udf_inode_info *iinfo;
499 /* The previous extent is fake and we should not extend by anything
500 * - there's nothing to do... */
501 if (!new_block_bytes && fake)
504 iinfo = UDF_I(inode);
505 /* Round the last extent up to a multiple of block size */
506 if (last_ext->extLength & (sb->s_blocksize - 1)) {
507 last_ext->extLength =
508 (last_ext->extLength & UDF_EXTENT_FLAG_MASK) |
509 (((last_ext->extLength & UDF_EXTENT_LENGTH_MASK) +
510 sb->s_blocksize - 1) & ~(sb->s_blocksize - 1));
511 iinfo->i_lenExtents =
512 (iinfo->i_lenExtents + sb->s_blocksize - 1) &
513 ~(sb->s_blocksize - 1);
516 /* Last extent are just preallocated blocks? */
517 if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) ==
518 EXT_NOT_RECORDED_ALLOCATED) {
519 /* Save the extent so that we can reattach it to the end */
520 prealloc_loc = last_ext->extLocation;
521 prealloc_len = last_ext->extLength;
522 /* Mark the extent as a hole */
523 last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED |
524 (last_ext->extLength & UDF_EXTENT_LENGTH_MASK);
525 last_ext->extLocation.logicalBlockNum = 0;
526 last_ext->extLocation.partitionReferenceNum = 0;
529 /* Can we merge with the previous extent? */
530 if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) ==
531 EXT_NOT_RECORDED_NOT_ALLOCATED) {
532 add = (1 << 30) - sb->s_blocksize -
533 (last_ext->extLength & UDF_EXTENT_LENGTH_MASK);
534 if (add > new_block_bytes)
535 add = new_block_bytes;
536 new_block_bytes -= add;
537 last_ext->extLength += add;
541 udf_add_aext(inode, last_pos, &last_ext->extLocation,
542 last_ext->extLength, 1);
545 struct kernel_lb_addr tmploc;
548 udf_write_aext(inode, last_pos, &last_ext->extLocation,
549 last_ext->extLength, 1);
552 * We've rewritten the last extent. If we are going to add
553 * more extents, we may need to enter possible following
554 * empty indirect extent.
556 if (new_block_bytes || prealloc_len)
557 udf_next_aext(inode, last_pos, &tmploc, &tmplen, 0);
560 /* Managed to do everything necessary? */
561 if (!new_block_bytes)
564 /* All further extents will be NOT_RECORDED_NOT_ALLOCATED */
565 last_ext->extLocation.logicalBlockNum = 0;
566 last_ext->extLocation.partitionReferenceNum = 0;
567 add = (1 << 30) - sb->s_blocksize;
568 last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | add;
570 /* Create enough extents to cover the whole hole */
571 while (new_block_bytes > add) {
572 new_block_bytes -= add;
573 err = udf_add_aext(inode, last_pos, &last_ext->extLocation,
574 last_ext->extLength, 1);
579 if (new_block_bytes) {
580 last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED |
582 err = udf_add_aext(inode, last_pos, &last_ext->extLocation,
583 last_ext->extLength, 1);
590 /* Do we have some preallocated blocks saved? */
592 err = udf_add_aext(inode, last_pos, &prealloc_loc,
596 last_ext->extLocation = prealloc_loc;
597 last_ext->extLength = prealloc_len;
601 /* last_pos should point to the last written extent... */
602 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
603 last_pos->offset -= sizeof(struct short_ad);
604 else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
605 last_pos->offset -= sizeof(struct long_ad);
612 /* Extend the final block of the file to final_block_len bytes */
613 static void udf_do_extend_final_block(struct inode *inode,
614 struct extent_position *last_pos,
615 struct kernel_long_ad *last_ext,
616 uint32_t final_block_len)
618 struct super_block *sb = inode->i_sb;
619 uint32_t added_bytes;
621 added_bytes = final_block_len -
622 (last_ext->extLength & (sb->s_blocksize - 1));
623 last_ext->extLength += added_bytes;
624 UDF_I(inode)->i_lenExtents += added_bytes;
626 udf_write_aext(inode, last_pos, &last_ext->extLocation,
627 last_ext->extLength, 1);
630 static int udf_extend_file(struct inode *inode, loff_t newsize)
633 struct extent_position epos;
634 struct kernel_lb_addr eloc;
637 struct super_block *sb = inode->i_sb;
638 sector_t first_block = newsize >> sb->s_blocksize_bits, offset;
639 unsigned long partial_final_block;
641 struct udf_inode_info *iinfo = UDF_I(inode);
642 struct kernel_long_ad extent;
644 int within_final_block;
646 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
647 adsize = sizeof(struct short_ad);
648 else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
649 adsize = sizeof(struct long_ad);
653 etype = inode_bmap(inode, first_block, &epos, &eloc, &elen, &offset);
654 within_final_block = (etype != -1);
656 if ((!epos.bh && epos.offset == udf_file_entry_alloc_offset(inode)) ||
657 (epos.bh && epos.offset == sizeof(struct allocExtDesc))) {
658 /* File has no extents at all or has empty last
659 * indirect extent! Create a fake extent... */
660 extent.extLocation.logicalBlockNum = 0;
661 extent.extLocation.partitionReferenceNum = 0;
662 extent.extLength = EXT_NOT_RECORDED_NOT_ALLOCATED;
664 epos.offset -= adsize;
665 etype = udf_next_aext(inode, &epos, &extent.extLocation,
666 &extent.extLength, 0);
667 extent.extLength |= etype << 30;
670 partial_final_block = newsize & (sb->s_blocksize - 1);
672 /* File has extent covering the new size (could happen when extending
675 if (within_final_block) {
676 /* Extending file within the last file block */
677 udf_do_extend_final_block(inode, &epos, &extent,
678 partial_final_block);
680 loff_t add = ((loff_t)offset << sb->s_blocksize_bits) |
682 err = udf_do_extend_file(inode, &epos, &extent, add);
688 iinfo->i_lenExtents = newsize;
694 static sector_t inode_getblk(struct inode *inode, sector_t block,
697 struct kernel_long_ad laarr[EXTENT_MERGE_SIZE];
698 struct extent_position prev_epos, cur_epos, next_epos;
699 int count = 0, startnum = 0, endnum = 0;
700 uint32_t elen = 0, tmpelen;
701 struct kernel_lb_addr eloc, tmpeloc;
703 loff_t lbcount = 0, b_off = 0;
704 uint32_t newblocknum, newblock;
707 struct udf_inode_info *iinfo = UDF_I(inode);
708 int goal = 0, pgoal = iinfo->i_location.logicalBlockNum;
714 prev_epos.offset = udf_file_entry_alloc_offset(inode);
715 prev_epos.block = iinfo->i_location;
717 cur_epos = next_epos = prev_epos;
718 b_off = (loff_t)block << inode->i_sb->s_blocksize_bits;
720 /* find the extent which contains the block we are looking for.
721 alternate between laarr[0] and laarr[1] for locations of the
722 current extent, and the previous extent */
724 if (prev_epos.bh != cur_epos.bh) {
725 brelse(prev_epos.bh);
727 prev_epos.bh = cur_epos.bh;
729 if (cur_epos.bh != next_epos.bh) {
731 get_bh(next_epos.bh);
732 cur_epos.bh = next_epos.bh;
737 prev_epos.block = cur_epos.block;
738 cur_epos.block = next_epos.block;
740 prev_epos.offset = cur_epos.offset;
741 cur_epos.offset = next_epos.offset;
743 etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 1);
749 laarr[c].extLength = (etype << 30) | elen;
750 laarr[c].extLocation = eloc;
752 if (etype != (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))
753 pgoal = eloc.logicalBlockNum +
754 ((elen + inode->i_sb->s_blocksize - 1) >>
755 inode->i_sb->s_blocksize_bits);
758 } while (lbcount + elen <= b_off);
761 offset = b_off >> inode->i_sb->s_blocksize_bits;
763 * Move prev_epos and cur_epos into indirect extent if we are at
766 udf_next_aext(inode, &prev_epos, &tmpeloc, &tmpelen, 0);
767 udf_next_aext(inode, &cur_epos, &tmpeloc, &tmpelen, 0);
769 /* if the extent is allocated and recorded, return the block
770 if the extent is not a multiple of the blocksize, round up */
772 if (etype == (EXT_RECORDED_ALLOCATED >> 30)) {
773 if (elen & (inode->i_sb->s_blocksize - 1)) {
774 elen = EXT_RECORDED_ALLOCATED |
775 ((elen + inode->i_sb->s_blocksize - 1) &
776 ~(inode->i_sb->s_blocksize - 1));
777 udf_write_aext(inode, &cur_epos, &eloc, elen, 1);
779 brelse(prev_epos.bh);
781 brelse(next_epos.bh);
782 newblock = udf_get_lb_pblock(inode->i_sb, &eloc, offset);
786 /* Are we beyond EOF? */
796 /* Create a fake extent when there's not one */
797 memset(&laarr[0].extLocation, 0x00,
798 sizeof(struct kernel_lb_addr));
799 laarr[0].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED;
800 /* Will udf_do_extend_file() create real extent from
802 startnum = (offset > 0);
804 /* Create extents for the hole between EOF and offset */
805 hole_len = (loff_t)offset << inode->i_blkbits;
806 ret = udf_do_extend_file(inode, &prev_epos, laarr, hole_len);
808 brelse(prev_epos.bh);
810 brelse(next_epos.bh);
817 /* We are not covered by a preallocated extent? */
818 if ((laarr[0].extLength & UDF_EXTENT_FLAG_MASK) !=
819 EXT_NOT_RECORDED_ALLOCATED) {
820 /* Is there any real extent? - otherwise we overwrite
824 laarr[c].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED |
825 inode->i_sb->s_blocksize;
826 memset(&laarr[c].extLocation, 0x00,
827 sizeof(struct kernel_lb_addr));
834 endnum = startnum = ((count > 2) ? 2 : count);
836 /* if the current extent is in position 0,
837 swap it with the previous */
838 if (!c && count != 1) {
845 /* if the current block is located in an extent,
846 read the next extent */
847 etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 0);
849 laarr[c + 1].extLength = (etype << 30) | elen;
850 laarr[c + 1].extLocation = eloc;
858 /* if the current extent is not recorded but allocated, get the
859 * block in the extent corresponding to the requested block */
860 if ((laarr[c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30))
861 newblocknum = laarr[c].extLocation.logicalBlockNum + offset;
862 else { /* otherwise, allocate a new block */
863 if (iinfo->i_next_alloc_block == block)
864 goal = iinfo->i_next_alloc_goal;
867 if (!(goal = pgoal)) /* XXX: what was intended here? */
868 goal = iinfo->i_location.logicalBlockNum + 1;
871 newblocknum = udf_new_block(inode->i_sb, inode,
872 iinfo->i_location.partitionReferenceNum,
875 brelse(prev_epos.bh);
877 brelse(next_epos.bh);
882 iinfo->i_lenExtents += inode->i_sb->s_blocksize;
885 /* if the extent the requsted block is located in contains multiple
886 * blocks, split the extent into at most three extents. blocks prior
887 * to requested block, requested block, and blocks after requested
889 udf_split_extents(inode, &c, offset, newblocknum, laarr, &endnum);
891 #ifdef UDF_PREALLOCATE
892 /* We preallocate blocks only for regular files. It also makes sense
893 * for directories but there's a problem when to drop the
894 * preallocation. We might use some delayed work for that but I feel
895 * it's overengineering for a filesystem like UDF. */
896 if (S_ISREG(inode->i_mode))
897 udf_prealloc_extents(inode, c, lastblock, laarr, &endnum);
900 /* merge any continuous blocks in laarr */
901 udf_merge_extents(inode, laarr, &endnum);
903 /* write back the new extents, inserting new extents if the new number
904 * of extents is greater than the old number, and deleting extents if
905 * the new number of extents is less than the old number */
906 udf_update_extents(inode, laarr, startnum, endnum, &prev_epos);
908 brelse(prev_epos.bh);
910 brelse(next_epos.bh);
912 newblock = udf_get_pblock(inode->i_sb, newblocknum,
913 iinfo->i_location.partitionReferenceNum, 0);
919 iinfo->i_next_alloc_block = block;
920 iinfo->i_next_alloc_goal = newblocknum;
921 inode->i_ctime = current_time(inode);
924 udf_sync_inode(inode);
926 mark_inode_dirty(inode);
931 static void udf_split_extents(struct inode *inode, int *c, int offset,
933 struct kernel_long_ad laarr[EXTENT_MERGE_SIZE],
936 unsigned long blocksize = inode->i_sb->s_blocksize;
937 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits;
939 if ((laarr[*c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30) ||
940 (laarr[*c].extLength >> 30) ==
941 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) {
943 int blen = ((laarr[curr].extLength & UDF_EXTENT_LENGTH_MASK) +
944 blocksize - 1) >> blocksize_bits;
945 int8_t etype = (laarr[curr].extLength >> 30);
949 else if (!offset || blen == offset + 1) {
950 laarr[curr + 2] = laarr[curr + 1];
951 laarr[curr + 1] = laarr[curr];
953 laarr[curr + 3] = laarr[curr + 1];
954 laarr[curr + 2] = laarr[curr + 1] = laarr[curr];
958 if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30)) {
959 udf_free_blocks(inode->i_sb, inode,
960 &laarr[curr].extLocation,
962 laarr[curr].extLength =
963 EXT_NOT_RECORDED_NOT_ALLOCATED |
964 (offset << blocksize_bits);
965 laarr[curr].extLocation.logicalBlockNum = 0;
966 laarr[curr].extLocation.
967 partitionReferenceNum = 0;
969 laarr[curr].extLength = (etype << 30) |
970 (offset << blocksize_bits);
976 laarr[curr].extLocation.logicalBlockNum = newblocknum;
977 if (etype == (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))
978 laarr[curr].extLocation.partitionReferenceNum =
979 UDF_I(inode)->i_location.partitionReferenceNum;
980 laarr[curr].extLength = EXT_RECORDED_ALLOCATED |
984 if (blen != offset + 1) {
985 if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30))
986 laarr[curr].extLocation.logicalBlockNum +=
988 laarr[curr].extLength = (etype << 30) |
989 ((blen - (offset + 1)) << blocksize_bits);
996 static void udf_prealloc_extents(struct inode *inode, int c, int lastblock,
997 struct kernel_long_ad laarr[EXTENT_MERGE_SIZE],
1000 int start, length = 0, currlength = 0, i;
1002 if (*endnum >= (c + 1)) {
1008 if ((laarr[c + 1].extLength >> 30) ==
1009 (EXT_NOT_RECORDED_ALLOCATED >> 30)) {
1011 length = currlength =
1012 (((laarr[c + 1].extLength &
1013 UDF_EXTENT_LENGTH_MASK) +
1014 inode->i_sb->s_blocksize - 1) >>
1015 inode->i_sb->s_blocksize_bits);
1020 for (i = start + 1; i <= *endnum; i++) {
1023 length += UDF_DEFAULT_PREALLOC_BLOCKS;
1024 } else if ((laarr[i].extLength >> 30) ==
1025 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) {
1026 length += (((laarr[i].extLength &
1027 UDF_EXTENT_LENGTH_MASK) +
1028 inode->i_sb->s_blocksize - 1) >>
1029 inode->i_sb->s_blocksize_bits);
1035 int next = laarr[start].extLocation.logicalBlockNum +
1036 (((laarr[start].extLength & UDF_EXTENT_LENGTH_MASK) +
1037 inode->i_sb->s_blocksize - 1) >>
1038 inode->i_sb->s_blocksize_bits);
1039 int numalloc = udf_prealloc_blocks(inode->i_sb, inode,
1040 laarr[start].extLocation.partitionReferenceNum,
1041 next, (UDF_DEFAULT_PREALLOC_BLOCKS > length ?
1042 length : UDF_DEFAULT_PREALLOC_BLOCKS) -
1045 if (start == (c + 1))
1046 laarr[start].extLength +=
1048 inode->i_sb->s_blocksize_bits);
1050 memmove(&laarr[c + 2], &laarr[c + 1],
1051 sizeof(struct long_ad) * (*endnum - (c + 1)));
1053 laarr[c + 1].extLocation.logicalBlockNum = next;
1054 laarr[c + 1].extLocation.partitionReferenceNum =
1055 laarr[c].extLocation.
1056 partitionReferenceNum;
1057 laarr[c + 1].extLength =
1058 EXT_NOT_RECORDED_ALLOCATED |
1060 inode->i_sb->s_blocksize_bits);
1064 for (i = start + 1; numalloc && i < *endnum; i++) {
1065 int elen = ((laarr[i].extLength &
1066 UDF_EXTENT_LENGTH_MASK) +
1067 inode->i_sb->s_blocksize - 1) >>
1068 inode->i_sb->s_blocksize_bits;
1070 if (elen > numalloc) {
1071 laarr[i].extLength -=
1073 inode->i_sb->s_blocksize_bits);
1077 if (*endnum > (i + 1))
1080 sizeof(struct long_ad) *
1081 (*endnum - (i + 1)));
1086 UDF_I(inode)->i_lenExtents +=
1087 numalloc << inode->i_sb->s_blocksize_bits;
1092 static void udf_merge_extents(struct inode *inode,
1093 struct kernel_long_ad laarr[EXTENT_MERGE_SIZE],
1097 unsigned long blocksize = inode->i_sb->s_blocksize;
1098 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits;
1100 for (i = 0; i < (*endnum - 1); i++) {
1101 struct kernel_long_ad *li /*l[i]*/ = &laarr[i];
1102 struct kernel_long_ad *lip1 /*l[i plus 1]*/ = &laarr[i + 1];
1104 if (((li->extLength >> 30) == (lip1->extLength >> 30)) &&
1105 (((li->extLength >> 30) ==
1106 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) ||
1107 ((lip1->extLocation.logicalBlockNum -
1108 li->extLocation.logicalBlockNum) ==
1109 (((li->extLength & UDF_EXTENT_LENGTH_MASK) +
1110 blocksize - 1) >> blocksize_bits)))) {
1112 if (((li->extLength & UDF_EXTENT_LENGTH_MASK) +
1113 (lip1->extLength & UDF_EXTENT_LENGTH_MASK) +
1114 blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) {
1115 lip1->extLength = (lip1->extLength -
1117 UDF_EXTENT_LENGTH_MASK) +
1118 UDF_EXTENT_LENGTH_MASK) &
1120 li->extLength = (li->extLength &
1121 UDF_EXTENT_FLAG_MASK) +
1122 (UDF_EXTENT_LENGTH_MASK + 1) -
1124 lip1->extLocation.logicalBlockNum =
1125 li->extLocation.logicalBlockNum +
1127 UDF_EXTENT_LENGTH_MASK) >>
1130 li->extLength = lip1->extLength +
1132 UDF_EXTENT_LENGTH_MASK) +
1133 blocksize - 1) & ~(blocksize - 1));
1134 if (*endnum > (i + 2))
1135 memmove(&laarr[i + 1], &laarr[i + 2],
1136 sizeof(struct long_ad) *
1137 (*endnum - (i + 2)));
1141 } else if (((li->extLength >> 30) ==
1142 (EXT_NOT_RECORDED_ALLOCATED >> 30)) &&
1143 ((lip1->extLength >> 30) ==
1144 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))) {
1145 udf_free_blocks(inode->i_sb, inode, &li->extLocation, 0,
1147 UDF_EXTENT_LENGTH_MASK) +
1148 blocksize - 1) >> blocksize_bits);
1149 li->extLocation.logicalBlockNum = 0;
1150 li->extLocation.partitionReferenceNum = 0;
1152 if (((li->extLength & UDF_EXTENT_LENGTH_MASK) +
1153 (lip1->extLength & UDF_EXTENT_LENGTH_MASK) +
1154 blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) {
1155 lip1->extLength = (lip1->extLength -
1157 UDF_EXTENT_LENGTH_MASK) +
1158 UDF_EXTENT_LENGTH_MASK) &
1160 li->extLength = (li->extLength &
1161 UDF_EXTENT_FLAG_MASK) +
1162 (UDF_EXTENT_LENGTH_MASK + 1) -
1165 li->extLength = lip1->extLength +
1167 UDF_EXTENT_LENGTH_MASK) +
1168 blocksize - 1) & ~(blocksize - 1));
1169 if (*endnum > (i + 2))
1170 memmove(&laarr[i + 1], &laarr[i + 2],
1171 sizeof(struct long_ad) *
1172 (*endnum - (i + 2)));
1176 } else if ((li->extLength >> 30) ==
1177 (EXT_NOT_RECORDED_ALLOCATED >> 30)) {
1178 udf_free_blocks(inode->i_sb, inode,
1179 &li->extLocation, 0,
1181 UDF_EXTENT_LENGTH_MASK) +
1182 blocksize - 1) >> blocksize_bits);
1183 li->extLocation.logicalBlockNum = 0;
1184 li->extLocation.partitionReferenceNum = 0;
1185 li->extLength = (li->extLength &
1186 UDF_EXTENT_LENGTH_MASK) |
1187 EXT_NOT_RECORDED_NOT_ALLOCATED;
1192 static void udf_update_extents(struct inode *inode,
1193 struct kernel_long_ad laarr[EXTENT_MERGE_SIZE],
1194 int startnum, int endnum,
1195 struct extent_position *epos)
1198 struct kernel_lb_addr tmploc;
1201 if (startnum > endnum) {
1202 for (i = 0; i < (startnum - endnum); i++)
1203 udf_delete_aext(inode, *epos, laarr[i].extLocation,
1204 laarr[i].extLength);
1205 } else if (startnum < endnum) {
1206 for (i = 0; i < (endnum - startnum); i++) {
1207 udf_insert_aext(inode, *epos, laarr[i].extLocation,
1208 laarr[i].extLength);
1209 udf_next_aext(inode, epos, &laarr[i].extLocation,
1210 &laarr[i].extLength, 1);
1215 for (i = start; i < endnum; i++) {
1216 udf_next_aext(inode, epos, &tmploc, &tmplen, 0);
1217 udf_write_aext(inode, epos, &laarr[i].extLocation,
1218 laarr[i].extLength, 1);
1222 struct buffer_head *udf_bread(struct inode *inode, int block,
1223 int create, int *err)
1225 struct buffer_head *bh = NULL;
1227 bh = udf_getblk(inode, block, create, err);
1231 if (buffer_uptodate(bh))
1234 ll_rw_block(REQ_OP_READ, 0, 1, &bh);
1237 if (buffer_uptodate(bh))
1245 int udf_setsize(struct inode *inode, loff_t newsize)
1248 struct udf_inode_info *iinfo;
1249 int bsize = i_blocksize(inode);
1251 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
1252 S_ISLNK(inode->i_mode)))
1254 if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
1257 iinfo = UDF_I(inode);
1258 if (newsize > inode->i_size) {
1259 down_write(&iinfo->i_data_sem);
1260 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
1262 (udf_file_entry_alloc_offset(inode) + newsize)) {
1263 err = udf_expand_file_adinicb(inode);
1266 down_write(&iinfo->i_data_sem);
1268 iinfo->i_lenAlloc = newsize;
1272 err = udf_extend_file(inode, newsize);
1274 up_write(&iinfo->i_data_sem);
1278 up_write(&iinfo->i_data_sem);
1279 truncate_setsize(inode, newsize);
1281 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
1282 down_write(&iinfo->i_data_sem);
1283 udf_clear_extent_cache(inode);
1284 memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr + newsize,
1285 0x00, bsize - newsize -
1286 udf_file_entry_alloc_offset(inode));
1287 iinfo->i_lenAlloc = newsize;
1288 truncate_setsize(inode, newsize);
1289 up_write(&iinfo->i_data_sem);
1292 err = block_truncate_page(inode->i_mapping, newsize,
1296 truncate_setsize(inode, newsize);
1297 down_write(&iinfo->i_data_sem);
1298 udf_clear_extent_cache(inode);
1299 udf_truncate_extents(inode);
1300 up_write(&iinfo->i_data_sem);
1303 inode->i_mtime = inode->i_ctime = current_time(inode);
1305 udf_sync_inode(inode);
1307 mark_inode_dirty(inode);
1312 * Maximum length of linked list formed by ICB hierarchy. The chosen number is
1313 * arbitrary - just that we hopefully don't limit any real use of rewritten
1314 * inode on write-once media but avoid looping for too long on corrupted media.
1316 #define UDF_MAX_ICB_NESTING 1024
1318 static int udf_read_inode(struct inode *inode, bool hidden_inode)
1320 struct buffer_head *bh = NULL;
1321 struct fileEntry *fe;
1322 struct extendedFileEntry *efe;
1324 struct udf_inode_info *iinfo = UDF_I(inode);
1325 struct udf_sb_info *sbi = UDF_SB(inode->i_sb);
1326 struct kernel_lb_addr *iloc = &iinfo->i_location;
1327 unsigned int link_count;
1328 unsigned int indirections = 0;
1329 int bs = inode->i_sb->s_blocksize;
1333 if (iloc->logicalBlockNum >=
1334 sbi->s_partmaps[iloc->partitionReferenceNum].s_partition_len) {
1335 udf_debug("block=%d, partition=%d out of range\n",
1336 iloc->logicalBlockNum, iloc->partitionReferenceNum);
1341 * Set defaults, but the inode is still incomplete!
1342 * Note: get_new_inode() sets the following on a new inode:
1345 * i_flags = sb->s_flags
1347 * clean_inode(): zero fills and sets
1352 bh = udf_read_ptagged(inode->i_sb, iloc, 0, &ident);
1354 udf_err(inode->i_sb, "(ino %ld) failed !bh\n", inode->i_ino);
1358 if (ident != TAG_IDENT_FE && ident != TAG_IDENT_EFE &&
1359 ident != TAG_IDENT_USE) {
1360 udf_err(inode->i_sb, "(ino %ld) failed ident=%d\n",
1361 inode->i_ino, ident);
1365 fe = (struct fileEntry *)bh->b_data;
1366 efe = (struct extendedFileEntry *)bh->b_data;
1368 if (fe->icbTag.strategyType == cpu_to_le16(4096)) {
1369 struct buffer_head *ibh;
1371 ibh = udf_read_ptagged(inode->i_sb, iloc, 1, &ident);
1372 if (ident == TAG_IDENT_IE && ibh) {
1373 struct kernel_lb_addr loc;
1374 struct indirectEntry *ie;
1376 ie = (struct indirectEntry *)ibh->b_data;
1377 loc = lelb_to_cpu(ie->indirectICB.extLocation);
1379 if (ie->indirectICB.extLength) {
1381 memcpy(&iinfo->i_location, &loc,
1382 sizeof(struct kernel_lb_addr));
1383 if (++indirections > UDF_MAX_ICB_NESTING) {
1384 udf_err(inode->i_sb,
1385 "too many ICBs in ICB hierarchy"
1386 " (max %d supported)\n",
1387 UDF_MAX_ICB_NESTING);
1395 } else if (fe->icbTag.strategyType != cpu_to_le16(4)) {
1396 udf_err(inode->i_sb, "unsupported strategy type: %d\n",
1397 le16_to_cpu(fe->icbTag.strategyType));
1400 if (fe->icbTag.strategyType == cpu_to_le16(4))
1401 iinfo->i_strat4096 = 0;
1402 else /* if (fe->icbTag.strategyType == cpu_to_le16(4096)) */
1403 iinfo->i_strat4096 = 1;
1405 iinfo->i_alloc_type = le16_to_cpu(fe->icbTag.flags) &
1406 ICBTAG_FLAG_AD_MASK;
1407 if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_SHORT &&
1408 iinfo->i_alloc_type != ICBTAG_FLAG_AD_LONG &&
1409 iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
1413 iinfo->i_unique = 0;
1414 iinfo->i_lenEAttr = 0;
1415 iinfo->i_lenExtents = 0;
1416 iinfo->i_lenAlloc = 0;
1417 iinfo->i_next_alloc_block = 0;
1418 iinfo->i_next_alloc_goal = 0;
1419 if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_EFE)) {
1422 ret = udf_alloc_i_data(inode, bs -
1423 sizeof(struct extendedFileEntry));
1426 memcpy(iinfo->i_ext.i_data,
1427 bh->b_data + sizeof(struct extendedFileEntry),
1428 bs - sizeof(struct extendedFileEntry));
1429 } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_FE)) {
1432 ret = udf_alloc_i_data(inode, bs - sizeof(struct fileEntry));
1435 memcpy(iinfo->i_ext.i_data,
1436 bh->b_data + sizeof(struct fileEntry),
1437 bs - sizeof(struct fileEntry));
1438 } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_USE)) {
1441 iinfo->i_lenAlloc = le32_to_cpu(
1442 ((struct unallocSpaceEntry *)bh->b_data)->
1444 ret = udf_alloc_i_data(inode, bs -
1445 sizeof(struct unallocSpaceEntry));
1448 memcpy(iinfo->i_ext.i_data,
1449 bh->b_data + sizeof(struct unallocSpaceEntry),
1450 bs - sizeof(struct unallocSpaceEntry));
1455 read_lock(&sbi->s_cred_lock);
1456 i_uid_write(inode, le32_to_cpu(fe->uid));
1457 if (!uid_valid(inode->i_uid) ||
1458 UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_IGNORE) ||
1459 UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_SET))
1460 inode->i_uid = UDF_SB(inode->i_sb)->s_uid;
1462 i_gid_write(inode, le32_to_cpu(fe->gid));
1463 if (!gid_valid(inode->i_gid) ||
1464 UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_IGNORE) ||
1465 UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_SET))
1466 inode->i_gid = UDF_SB(inode->i_sb)->s_gid;
1468 if (fe->icbTag.fileType != ICBTAG_FILE_TYPE_DIRECTORY &&
1469 sbi->s_fmode != UDF_INVALID_MODE)
1470 inode->i_mode = sbi->s_fmode;
1471 else if (fe->icbTag.fileType == ICBTAG_FILE_TYPE_DIRECTORY &&
1472 sbi->s_dmode != UDF_INVALID_MODE)
1473 inode->i_mode = sbi->s_dmode;
1475 inode->i_mode = udf_convert_permissions(fe);
1476 inode->i_mode &= ~sbi->s_umask;
1477 read_unlock(&sbi->s_cred_lock);
1479 link_count = le16_to_cpu(fe->fileLinkCount);
1481 if (!hidden_inode) {
1487 set_nlink(inode, link_count);
1489 inode->i_size = le64_to_cpu(fe->informationLength);
1490 iinfo->i_lenExtents = inode->i_size;
1492 if (iinfo->i_efe == 0) {
1493 inode->i_blocks = le64_to_cpu(fe->logicalBlocksRecorded) <<
1494 (inode->i_sb->s_blocksize_bits - 9);
1496 if (!udf_disk_stamp_to_time(&inode->i_atime, fe->accessTime))
1497 inode->i_atime = sbi->s_record_time;
1499 if (!udf_disk_stamp_to_time(&inode->i_mtime,
1500 fe->modificationTime))
1501 inode->i_mtime = sbi->s_record_time;
1503 if (!udf_disk_stamp_to_time(&inode->i_ctime, fe->attrTime))
1504 inode->i_ctime = sbi->s_record_time;
1506 iinfo->i_unique = le64_to_cpu(fe->uniqueID);
1507 iinfo->i_lenEAttr = le32_to_cpu(fe->lengthExtendedAttr);
1508 iinfo->i_lenAlloc = le32_to_cpu(fe->lengthAllocDescs);
1509 iinfo->i_checkpoint = le32_to_cpu(fe->checkpoint);
1511 inode->i_blocks = le64_to_cpu(efe->logicalBlocksRecorded) <<
1512 (inode->i_sb->s_blocksize_bits - 9);
1514 if (!udf_disk_stamp_to_time(&inode->i_atime, efe->accessTime))
1515 inode->i_atime = sbi->s_record_time;
1517 if (!udf_disk_stamp_to_time(&inode->i_mtime,
1518 efe->modificationTime))
1519 inode->i_mtime = sbi->s_record_time;
1521 if (!udf_disk_stamp_to_time(&iinfo->i_crtime, efe->createTime))
1522 iinfo->i_crtime = sbi->s_record_time;
1524 if (!udf_disk_stamp_to_time(&inode->i_ctime, efe->attrTime))
1525 inode->i_ctime = sbi->s_record_time;
1527 iinfo->i_unique = le64_to_cpu(efe->uniqueID);
1528 iinfo->i_lenEAttr = le32_to_cpu(efe->lengthExtendedAttr);
1529 iinfo->i_lenAlloc = le32_to_cpu(efe->lengthAllocDescs);
1530 iinfo->i_checkpoint = le32_to_cpu(efe->checkpoint);
1532 inode->i_generation = iinfo->i_unique;
1535 * Sanity check length of allocation descriptors and extended attrs to
1536 * avoid integer overflows
1538 if (iinfo->i_lenEAttr > bs || iinfo->i_lenAlloc > bs)
1540 /* Now do exact checks */
1541 if (udf_file_entry_alloc_offset(inode) + iinfo->i_lenAlloc > bs)
1543 /* Sanity checks for files in ICB so that we don't get confused later */
1544 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
1546 * For file in ICB data is stored in allocation descriptor
1547 * so sizes should match
1549 if (iinfo->i_lenAlloc != inode->i_size)
1551 /* File in ICB has to fit in there... */
1552 if (inode->i_size > bs - udf_file_entry_alloc_offset(inode))
1556 switch (fe->icbTag.fileType) {
1557 case ICBTAG_FILE_TYPE_DIRECTORY:
1558 inode->i_op = &udf_dir_inode_operations;
1559 inode->i_fop = &udf_dir_operations;
1560 inode->i_mode |= S_IFDIR;
1563 case ICBTAG_FILE_TYPE_REALTIME:
1564 case ICBTAG_FILE_TYPE_REGULAR:
1565 case ICBTAG_FILE_TYPE_UNDEF:
1566 case ICBTAG_FILE_TYPE_VAT20:
1567 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
1568 inode->i_data.a_ops = &udf_adinicb_aops;
1570 inode->i_data.a_ops = &udf_aops;
1571 inode->i_op = &udf_file_inode_operations;
1572 inode->i_fop = &udf_file_operations;
1573 inode->i_mode |= S_IFREG;
1575 case ICBTAG_FILE_TYPE_BLOCK:
1576 inode->i_mode |= S_IFBLK;
1578 case ICBTAG_FILE_TYPE_CHAR:
1579 inode->i_mode |= S_IFCHR;
1581 case ICBTAG_FILE_TYPE_FIFO:
1582 init_special_inode(inode, inode->i_mode | S_IFIFO, 0);
1584 case ICBTAG_FILE_TYPE_SOCKET:
1585 init_special_inode(inode, inode->i_mode | S_IFSOCK, 0);
1587 case ICBTAG_FILE_TYPE_SYMLINK:
1588 inode->i_data.a_ops = &udf_symlink_aops;
1589 inode->i_op = &page_symlink_inode_operations;
1590 inode_nohighmem(inode);
1591 inode->i_mode = S_IFLNK | S_IRWXUGO;
1593 case ICBTAG_FILE_TYPE_MAIN:
1594 udf_debug("METADATA FILE-----\n");
1596 case ICBTAG_FILE_TYPE_MIRROR:
1597 udf_debug("METADATA MIRROR FILE-----\n");
1599 case ICBTAG_FILE_TYPE_BITMAP:
1600 udf_debug("METADATA BITMAP FILE-----\n");
1603 udf_err(inode->i_sb, "(ino %ld) failed unknown file type=%d\n",
1604 inode->i_ino, fe->icbTag.fileType);
1607 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
1608 struct deviceSpec *dsea =
1609 (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1);
1611 init_special_inode(inode, inode->i_mode,
1612 MKDEV(le32_to_cpu(dsea->majorDeviceIdent),
1613 le32_to_cpu(dsea->minorDeviceIdent)));
1614 /* Developer ID ??? */
1624 static int udf_alloc_i_data(struct inode *inode, size_t size)
1626 struct udf_inode_info *iinfo = UDF_I(inode);
1627 iinfo->i_ext.i_data = kmalloc(size, GFP_KERNEL);
1629 if (!iinfo->i_ext.i_data) {
1630 udf_err(inode->i_sb, "(ino %ld) no free memory\n",
1638 static umode_t udf_convert_permissions(struct fileEntry *fe)
1641 uint32_t permissions;
1644 permissions = le32_to_cpu(fe->permissions);
1645 flags = le16_to_cpu(fe->icbTag.flags);
1647 mode = ((permissions) & S_IRWXO) |
1648 ((permissions >> 2) & S_IRWXG) |
1649 ((permissions >> 4) & S_IRWXU) |
1650 ((flags & ICBTAG_FLAG_SETUID) ? S_ISUID : 0) |
1651 ((flags & ICBTAG_FLAG_SETGID) ? S_ISGID : 0) |
1652 ((flags & ICBTAG_FLAG_STICKY) ? S_ISVTX : 0);
1657 int udf_write_inode(struct inode *inode, struct writeback_control *wbc)
1659 return udf_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL);
1662 static int udf_sync_inode(struct inode *inode)
1664 return udf_update_inode(inode, 1);
1667 static int udf_update_inode(struct inode *inode, int do_sync)
1669 struct buffer_head *bh = NULL;
1670 struct fileEntry *fe;
1671 struct extendedFileEntry *efe;
1672 uint64_t lb_recorded;
1677 struct udf_sb_info *sbi = UDF_SB(inode->i_sb);
1678 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits;
1679 struct udf_inode_info *iinfo = UDF_I(inode);
1681 bh = udf_tgetblk(inode->i_sb,
1682 udf_get_lb_pblock(inode->i_sb, &iinfo->i_location, 0));
1684 udf_debug("getblk failure\n");
1689 memset(bh->b_data, 0, inode->i_sb->s_blocksize);
1690 fe = (struct fileEntry *)bh->b_data;
1691 efe = (struct extendedFileEntry *)bh->b_data;
1694 struct unallocSpaceEntry *use =
1695 (struct unallocSpaceEntry *)bh->b_data;
1697 use->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc);
1698 memcpy(bh->b_data + sizeof(struct unallocSpaceEntry),
1699 iinfo->i_ext.i_data, inode->i_sb->s_blocksize -
1700 sizeof(struct unallocSpaceEntry));
1701 use->descTag.tagIdent = cpu_to_le16(TAG_IDENT_USE);
1702 crclen = sizeof(struct unallocSpaceEntry);
1707 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_FORGET))
1708 fe->uid = cpu_to_le32(-1);
1710 fe->uid = cpu_to_le32(i_uid_read(inode));
1712 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_FORGET))
1713 fe->gid = cpu_to_le32(-1);
1715 fe->gid = cpu_to_le32(i_gid_read(inode));
1717 udfperms = ((inode->i_mode & S_IRWXO)) |
1718 ((inode->i_mode & S_IRWXG) << 2) |
1719 ((inode->i_mode & S_IRWXU) << 4);
1721 udfperms |= (le32_to_cpu(fe->permissions) &
1722 (FE_PERM_O_DELETE | FE_PERM_O_CHATTR |
1723 FE_PERM_G_DELETE | FE_PERM_G_CHATTR |
1724 FE_PERM_U_DELETE | FE_PERM_U_CHATTR));
1725 fe->permissions = cpu_to_le32(udfperms);
1727 if (S_ISDIR(inode->i_mode) && inode->i_nlink > 0)
1728 fe->fileLinkCount = cpu_to_le16(inode->i_nlink - 1);
1730 fe->fileLinkCount = cpu_to_le16(inode->i_nlink);
1732 fe->informationLength = cpu_to_le64(inode->i_size);
1734 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
1736 struct deviceSpec *dsea =
1737 (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1);
1739 dsea = (struct deviceSpec *)
1740 udf_add_extendedattr(inode,
1741 sizeof(struct deviceSpec) +
1742 sizeof(struct regid), 12, 0x3);
1743 dsea->attrType = cpu_to_le32(12);
1744 dsea->attrSubtype = 1;
1745 dsea->attrLength = cpu_to_le32(
1746 sizeof(struct deviceSpec) +
1747 sizeof(struct regid));
1748 dsea->impUseLength = cpu_to_le32(sizeof(struct regid));
1750 eid = (struct regid *)dsea->impUse;
1751 memset(eid, 0, sizeof(struct regid));
1752 strcpy(eid->ident, UDF_ID_DEVELOPER);
1753 eid->identSuffix[0] = UDF_OS_CLASS_UNIX;
1754 eid->identSuffix[1] = UDF_OS_ID_LINUX;
1755 dsea->majorDeviceIdent = cpu_to_le32(imajor(inode));
1756 dsea->minorDeviceIdent = cpu_to_le32(iminor(inode));
1759 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
1760 lb_recorded = 0; /* No extents => no blocks! */
1763 (inode->i_blocks + (1 << (blocksize_bits - 9)) - 1) >>
1764 (blocksize_bits - 9);
1766 if (iinfo->i_efe == 0) {
1767 memcpy(bh->b_data + sizeof(struct fileEntry),
1768 iinfo->i_ext.i_data,
1769 inode->i_sb->s_blocksize - sizeof(struct fileEntry));
1770 fe->logicalBlocksRecorded = cpu_to_le64(lb_recorded);
1772 udf_time_to_disk_stamp(&fe->accessTime, inode->i_atime);
1773 udf_time_to_disk_stamp(&fe->modificationTime, inode->i_mtime);
1774 udf_time_to_disk_stamp(&fe->attrTime, inode->i_ctime);
1775 memset(&(fe->impIdent), 0, sizeof(struct regid));
1776 strcpy(fe->impIdent.ident, UDF_ID_DEVELOPER);
1777 fe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1778 fe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1779 fe->uniqueID = cpu_to_le64(iinfo->i_unique);
1780 fe->lengthExtendedAttr = cpu_to_le32(iinfo->i_lenEAttr);
1781 fe->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc);
1782 fe->checkpoint = cpu_to_le32(iinfo->i_checkpoint);
1783 fe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_FE);
1784 crclen = sizeof(struct fileEntry);
1786 memcpy(bh->b_data + sizeof(struct extendedFileEntry),
1787 iinfo->i_ext.i_data,
1788 inode->i_sb->s_blocksize -
1789 sizeof(struct extendedFileEntry));
1790 efe->objectSize = cpu_to_le64(inode->i_size);
1791 efe->logicalBlocksRecorded = cpu_to_le64(lb_recorded);
1793 if (iinfo->i_crtime.tv_sec > inode->i_atime.tv_sec ||
1794 (iinfo->i_crtime.tv_sec == inode->i_atime.tv_sec &&
1795 iinfo->i_crtime.tv_nsec > inode->i_atime.tv_nsec))
1796 iinfo->i_crtime = inode->i_atime;
1798 if (iinfo->i_crtime.tv_sec > inode->i_mtime.tv_sec ||
1799 (iinfo->i_crtime.tv_sec == inode->i_mtime.tv_sec &&
1800 iinfo->i_crtime.tv_nsec > inode->i_mtime.tv_nsec))
1801 iinfo->i_crtime = inode->i_mtime;
1803 if (iinfo->i_crtime.tv_sec > inode->i_ctime.tv_sec ||
1804 (iinfo->i_crtime.tv_sec == inode->i_ctime.tv_sec &&
1805 iinfo->i_crtime.tv_nsec > inode->i_ctime.tv_nsec))
1806 iinfo->i_crtime = inode->i_ctime;
1808 udf_time_to_disk_stamp(&efe->accessTime, inode->i_atime);
1809 udf_time_to_disk_stamp(&efe->modificationTime, inode->i_mtime);
1810 udf_time_to_disk_stamp(&efe->createTime, iinfo->i_crtime);
1811 udf_time_to_disk_stamp(&efe->attrTime, inode->i_ctime);
1813 memset(&(efe->impIdent), 0, sizeof(struct regid));
1814 strcpy(efe->impIdent.ident, UDF_ID_DEVELOPER);
1815 efe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1816 efe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1817 efe->uniqueID = cpu_to_le64(iinfo->i_unique);
1818 efe->lengthExtendedAttr = cpu_to_le32(iinfo->i_lenEAttr);
1819 efe->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc);
1820 efe->checkpoint = cpu_to_le32(iinfo->i_checkpoint);
1821 efe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_EFE);
1822 crclen = sizeof(struct extendedFileEntry);
1826 if (iinfo->i_strat4096) {
1827 fe->icbTag.strategyType = cpu_to_le16(4096);
1828 fe->icbTag.strategyParameter = cpu_to_le16(1);
1829 fe->icbTag.numEntries = cpu_to_le16(2);
1831 fe->icbTag.strategyType = cpu_to_le16(4);
1832 fe->icbTag.numEntries = cpu_to_le16(1);
1836 fe->icbTag.fileType = ICBTAG_FILE_TYPE_USE;
1837 else if (S_ISDIR(inode->i_mode))
1838 fe->icbTag.fileType = ICBTAG_FILE_TYPE_DIRECTORY;
1839 else if (S_ISREG(inode->i_mode))
1840 fe->icbTag.fileType = ICBTAG_FILE_TYPE_REGULAR;
1841 else if (S_ISLNK(inode->i_mode))
1842 fe->icbTag.fileType = ICBTAG_FILE_TYPE_SYMLINK;
1843 else if (S_ISBLK(inode->i_mode))
1844 fe->icbTag.fileType = ICBTAG_FILE_TYPE_BLOCK;
1845 else if (S_ISCHR(inode->i_mode))
1846 fe->icbTag.fileType = ICBTAG_FILE_TYPE_CHAR;
1847 else if (S_ISFIFO(inode->i_mode))
1848 fe->icbTag.fileType = ICBTAG_FILE_TYPE_FIFO;
1849 else if (S_ISSOCK(inode->i_mode))
1850 fe->icbTag.fileType = ICBTAG_FILE_TYPE_SOCKET;
1852 icbflags = iinfo->i_alloc_type |
1853 ((inode->i_mode & S_ISUID) ? ICBTAG_FLAG_SETUID : 0) |
1854 ((inode->i_mode & S_ISGID) ? ICBTAG_FLAG_SETGID : 0) |
1855 ((inode->i_mode & S_ISVTX) ? ICBTAG_FLAG_STICKY : 0) |
1856 (le16_to_cpu(fe->icbTag.flags) &
1857 ~(ICBTAG_FLAG_AD_MASK | ICBTAG_FLAG_SETUID |
1858 ICBTAG_FLAG_SETGID | ICBTAG_FLAG_STICKY));
1860 fe->icbTag.flags = cpu_to_le16(icbflags);
1861 if (sbi->s_udfrev >= 0x0200)
1862 fe->descTag.descVersion = cpu_to_le16(3);
1864 fe->descTag.descVersion = cpu_to_le16(2);
1865 fe->descTag.tagSerialNum = cpu_to_le16(sbi->s_serial_number);
1866 fe->descTag.tagLocation = cpu_to_le32(
1867 iinfo->i_location.logicalBlockNum);
1868 crclen += iinfo->i_lenEAttr + iinfo->i_lenAlloc - sizeof(struct tag);
1869 fe->descTag.descCRCLength = cpu_to_le16(crclen);
1870 fe->descTag.descCRC = cpu_to_le16(crc_itu_t(0, (char *)fe + sizeof(struct tag),
1872 fe->descTag.tagChecksum = udf_tag_checksum(&fe->descTag);
1874 set_buffer_uptodate(bh);
1877 /* write the data blocks */
1878 mark_buffer_dirty(bh);
1880 sync_dirty_buffer(bh);
1881 if (buffer_write_io_error(bh)) {
1882 udf_warn(inode->i_sb, "IO error syncing udf inode [%08lx]\n",
1892 struct inode *__udf_iget(struct super_block *sb, struct kernel_lb_addr *ino,
1895 unsigned long block = udf_get_lb_pblock(sb, ino, 0);
1896 struct inode *inode = iget_locked(sb, block);
1900 return ERR_PTR(-ENOMEM);
1902 if (!(inode->i_state & I_NEW))
1905 memcpy(&UDF_I(inode)->i_location, ino, sizeof(struct kernel_lb_addr));
1906 err = udf_read_inode(inode, hidden_inode);
1909 return ERR_PTR(err);
1911 unlock_new_inode(inode);
1916 int udf_setup_indirect_aext(struct inode *inode, int block,
1917 struct extent_position *epos)
1919 struct super_block *sb = inode->i_sb;
1920 struct buffer_head *bh;
1921 struct allocExtDesc *aed;
1922 struct extent_position nepos;
1923 struct kernel_lb_addr neloc;
1926 if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
1927 adsize = sizeof(struct short_ad);
1928 else if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_LONG)
1929 adsize = sizeof(struct long_ad);
1933 neloc.logicalBlockNum = block;
1934 neloc.partitionReferenceNum = epos->block.partitionReferenceNum;
1936 bh = udf_tgetblk(sb, udf_get_lb_pblock(sb, &neloc, 0));
1940 memset(bh->b_data, 0x00, sb->s_blocksize);
1941 set_buffer_uptodate(bh);
1943 mark_buffer_dirty_inode(bh, inode);
1945 aed = (struct allocExtDesc *)(bh->b_data);
1946 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_STRICT)) {
1947 aed->previousAllocExtLocation =
1948 cpu_to_le32(epos->block.logicalBlockNum);
1950 aed->lengthAllocDescs = cpu_to_le32(0);
1951 if (UDF_SB(sb)->s_udfrev >= 0x0200)
1955 udf_new_tag(bh->b_data, TAG_IDENT_AED, ver, 1, block,
1956 sizeof(struct tag));
1958 nepos.block = neloc;
1959 nepos.offset = sizeof(struct allocExtDesc);
1963 * Do we have to copy current last extent to make space for indirect
1966 if (epos->offset + adsize > sb->s_blocksize) {
1967 struct kernel_lb_addr cp_loc;
1971 epos->offset -= adsize;
1972 cp_type = udf_current_aext(inode, epos, &cp_loc, &cp_len, 0);
1973 cp_len |= ((uint32_t)cp_type) << 30;
1975 __udf_add_aext(inode, &nepos, &cp_loc, cp_len, 1);
1976 udf_write_aext(inode, epos, &nepos.block,
1977 sb->s_blocksize | EXT_NEXT_EXTENT_ALLOCDECS, 0);
1979 __udf_add_aext(inode, epos, &nepos.block,
1980 sb->s_blocksize | EXT_NEXT_EXTENT_ALLOCDECS, 0);
1990 * Append extent at the given position - should be the first free one in inode
1991 * / indirect extent. This function assumes there is enough space in the inode
1992 * or indirect extent. Use udf_add_aext() if you didn't check for this before.
1994 int __udf_add_aext(struct inode *inode, struct extent_position *epos,
1995 struct kernel_lb_addr *eloc, uint32_t elen, int inc)
1997 struct udf_inode_info *iinfo = UDF_I(inode);
1998 struct allocExtDesc *aed;
2001 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
2002 adsize = sizeof(struct short_ad);
2003 else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
2004 adsize = sizeof(struct long_ad);
2009 WARN_ON(iinfo->i_lenAlloc !=
2010 epos->offset - udf_file_entry_alloc_offset(inode));
2012 aed = (struct allocExtDesc *)epos->bh->b_data;
2013 WARN_ON(le32_to_cpu(aed->lengthAllocDescs) !=
2014 epos->offset - sizeof(struct allocExtDesc));
2015 WARN_ON(epos->offset + adsize > inode->i_sb->s_blocksize);
2018 udf_write_aext(inode, epos, eloc, elen, inc);
2021 iinfo->i_lenAlloc += adsize;
2022 mark_inode_dirty(inode);
2024 aed = (struct allocExtDesc *)epos->bh->b_data;
2025 le32_add_cpu(&aed->lengthAllocDescs, adsize);
2026 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
2027 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201)
2028 udf_update_tag(epos->bh->b_data,
2029 epos->offset + (inc ? 0 : adsize));
2031 udf_update_tag(epos->bh->b_data,
2032 sizeof(struct allocExtDesc));
2033 mark_buffer_dirty_inode(epos->bh, inode);
2040 * Append extent at given position - should be the first free one in inode
2041 * / indirect extent. Takes care of allocating and linking indirect blocks.
2043 int udf_add_aext(struct inode *inode, struct extent_position *epos,
2044 struct kernel_lb_addr *eloc, uint32_t elen, int inc)
2047 struct super_block *sb = inode->i_sb;
2049 if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
2050 adsize = sizeof(struct short_ad);
2051 else if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_LONG)
2052 adsize = sizeof(struct long_ad);
2056 if (epos->offset + (2 * adsize) > sb->s_blocksize) {
2060 new_block = udf_new_block(sb, NULL,
2061 epos->block.partitionReferenceNum,
2062 epos->block.logicalBlockNum, &err);
2066 err = udf_setup_indirect_aext(inode, new_block, epos);
2071 return __udf_add_aext(inode, epos, eloc, elen, inc);
2074 void udf_write_aext(struct inode *inode, struct extent_position *epos,
2075 struct kernel_lb_addr *eloc, uint32_t elen, int inc)
2079 struct short_ad *sad;
2080 struct long_ad *lad;
2081 struct udf_inode_info *iinfo = UDF_I(inode);
2084 ptr = iinfo->i_ext.i_data + epos->offset -
2085 udf_file_entry_alloc_offset(inode) +
2088 ptr = epos->bh->b_data + epos->offset;
2090 switch (iinfo->i_alloc_type) {
2091 case ICBTAG_FLAG_AD_SHORT:
2092 sad = (struct short_ad *)ptr;
2093 sad->extLength = cpu_to_le32(elen);
2094 sad->extPosition = cpu_to_le32(eloc->logicalBlockNum);
2095 adsize = sizeof(struct short_ad);
2097 case ICBTAG_FLAG_AD_LONG:
2098 lad = (struct long_ad *)ptr;
2099 lad->extLength = cpu_to_le32(elen);
2100 lad->extLocation = cpu_to_lelb(*eloc);
2101 memset(lad->impUse, 0x00, sizeof(lad->impUse));
2102 adsize = sizeof(struct long_ad);
2109 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
2110 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) {
2111 struct allocExtDesc *aed =
2112 (struct allocExtDesc *)epos->bh->b_data;
2113 udf_update_tag(epos->bh->b_data,
2114 le32_to_cpu(aed->lengthAllocDescs) +
2115 sizeof(struct allocExtDesc));
2117 mark_buffer_dirty_inode(epos->bh, inode);
2119 mark_inode_dirty(inode);
2123 epos->offset += adsize;
2127 * Only 1 indirect extent in a row really makes sense but allow upto 16 in case
2128 * someone does some weird stuff.
2130 #define UDF_MAX_INDIR_EXTS 16
2132 int8_t udf_next_aext(struct inode *inode, struct extent_position *epos,
2133 struct kernel_lb_addr *eloc, uint32_t *elen, int inc)
2136 unsigned int indirections = 0;
2138 while ((etype = udf_current_aext(inode, epos, eloc, elen, inc)) ==
2139 (EXT_NEXT_EXTENT_ALLOCDECS >> 30)) {
2142 if (++indirections > UDF_MAX_INDIR_EXTS) {
2143 udf_err(inode->i_sb,
2144 "too many indirect extents in inode %lu\n",
2149 epos->block = *eloc;
2150 epos->offset = sizeof(struct allocExtDesc);
2152 block = udf_get_lb_pblock(inode->i_sb, &epos->block, 0);
2153 epos->bh = udf_tread(inode->i_sb, block);
2155 udf_debug("reading block %d failed!\n", block);
2163 int8_t udf_current_aext(struct inode *inode, struct extent_position *epos,
2164 struct kernel_lb_addr *eloc, uint32_t *elen, int inc)
2169 struct short_ad *sad;
2170 struct long_ad *lad;
2171 struct udf_inode_info *iinfo = UDF_I(inode);
2175 epos->offset = udf_file_entry_alloc_offset(inode);
2176 ptr = iinfo->i_ext.i_data + epos->offset -
2177 udf_file_entry_alloc_offset(inode) +
2179 alen = udf_file_entry_alloc_offset(inode) +
2183 epos->offset = sizeof(struct allocExtDesc);
2184 ptr = epos->bh->b_data + epos->offset;
2185 alen = sizeof(struct allocExtDesc) +
2186 le32_to_cpu(((struct allocExtDesc *)epos->bh->b_data)->
2190 switch (iinfo->i_alloc_type) {
2191 case ICBTAG_FLAG_AD_SHORT:
2192 sad = udf_get_fileshortad(ptr, alen, &epos->offset, inc);
2195 etype = le32_to_cpu(sad->extLength) >> 30;
2196 eloc->logicalBlockNum = le32_to_cpu(sad->extPosition);
2197 eloc->partitionReferenceNum =
2198 iinfo->i_location.partitionReferenceNum;
2199 *elen = le32_to_cpu(sad->extLength) & UDF_EXTENT_LENGTH_MASK;
2201 case ICBTAG_FLAG_AD_LONG:
2202 lad = udf_get_filelongad(ptr, alen, &epos->offset, inc);
2205 etype = le32_to_cpu(lad->extLength) >> 30;
2206 *eloc = lelb_to_cpu(lad->extLocation);
2207 *elen = le32_to_cpu(lad->extLength) & UDF_EXTENT_LENGTH_MASK;
2210 udf_debug("alloc_type = %d unsupported\n", iinfo->i_alloc_type);
2217 static int8_t udf_insert_aext(struct inode *inode, struct extent_position epos,
2218 struct kernel_lb_addr neloc, uint32_t nelen)
2220 struct kernel_lb_addr oeloc;
2227 while ((etype = udf_next_aext(inode, &epos, &oeloc, &oelen, 0)) != -1) {
2228 udf_write_aext(inode, &epos, &neloc, nelen, 1);
2230 nelen = (etype << 30) | oelen;
2232 udf_add_aext(inode, &epos, &neloc, nelen, 1);
2235 return (nelen >> 30);
2238 int8_t udf_delete_aext(struct inode *inode, struct extent_position epos,
2239 struct kernel_lb_addr eloc, uint32_t elen)
2241 struct extent_position oepos;
2244 struct allocExtDesc *aed;
2245 struct udf_inode_info *iinfo;
2252 iinfo = UDF_I(inode);
2253 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
2254 adsize = sizeof(struct short_ad);
2255 else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
2256 adsize = sizeof(struct long_ad);
2261 if (udf_next_aext(inode, &epos, &eloc, &elen, 1) == -1)
2264 while ((etype = udf_next_aext(inode, &epos, &eloc, &elen, 1)) != -1) {
2265 udf_write_aext(inode, &oepos, &eloc, (etype << 30) | elen, 1);
2266 if (oepos.bh != epos.bh) {
2267 oepos.block = epos.block;
2271 oepos.offset = epos.offset - adsize;
2274 memset(&eloc, 0x00, sizeof(struct kernel_lb_addr));
2277 if (epos.bh != oepos.bh) {
2278 udf_free_blocks(inode->i_sb, inode, &epos.block, 0, 1);
2279 udf_write_aext(inode, &oepos, &eloc, elen, 1);
2280 udf_write_aext(inode, &oepos, &eloc, elen, 1);
2282 iinfo->i_lenAlloc -= (adsize * 2);
2283 mark_inode_dirty(inode);
2285 aed = (struct allocExtDesc *)oepos.bh->b_data;
2286 le32_add_cpu(&aed->lengthAllocDescs, -(2 * adsize));
2287 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
2288 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201)
2289 udf_update_tag(oepos.bh->b_data,
2290 oepos.offset - (2 * adsize));
2292 udf_update_tag(oepos.bh->b_data,
2293 sizeof(struct allocExtDesc));
2294 mark_buffer_dirty_inode(oepos.bh, inode);
2297 udf_write_aext(inode, &oepos, &eloc, elen, 1);
2299 iinfo->i_lenAlloc -= adsize;
2300 mark_inode_dirty(inode);
2302 aed = (struct allocExtDesc *)oepos.bh->b_data;
2303 le32_add_cpu(&aed->lengthAllocDescs, -adsize);
2304 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
2305 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201)
2306 udf_update_tag(oepos.bh->b_data,
2307 epos.offset - adsize);
2309 udf_update_tag(oepos.bh->b_data,
2310 sizeof(struct allocExtDesc));
2311 mark_buffer_dirty_inode(oepos.bh, inode);
2318 return (elen >> 30);
2321 int8_t inode_bmap(struct inode *inode, sector_t block,
2322 struct extent_position *pos, struct kernel_lb_addr *eloc,
2323 uint32_t *elen, sector_t *offset)
2325 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits;
2326 loff_t lbcount = 0, bcount =
2327 (loff_t) block << blocksize_bits;
2329 struct udf_inode_info *iinfo;
2331 iinfo = UDF_I(inode);
2332 if (!udf_read_extent_cache(inode, bcount, &lbcount, pos)) {
2334 pos->block = iinfo->i_location;
2339 etype = udf_next_aext(inode, pos, eloc, elen, 1);
2341 *offset = (bcount - lbcount) >> blocksize_bits;
2342 iinfo->i_lenExtents = lbcount;
2346 } while (lbcount <= bcount);
2347 /* update extent cache */
2348 udf_update_extent_cache(inode, lbcount - *elen, pos, 1);
2349 *offset = (bcount + *elen - lbcount) >> blocksize_bits;
2354 long udf_block_map(struct inode *inode, sector_t block)
2356 struct kernel_lb_addr eloc;
2359 struct extent_position epos = {};
2362 down_read(&UDF_I(inode)->i_data_sem);
2364 if (inode_bmap(inode, block, &epos, &eloc, &elen, &offset) ==
2365 (EXT_RECORDED_ALLOCATED >> 30))
2366 ret = udf_get_lb_pblock(inode->i_sb, &eloc, offset);
2370 up_read(&UDF_I(inode)->i_data_sem);
2373 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_VARCONV))
2374 return udf_fixed_to_variable(ret);