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>
41 #include <linux/bio.h>
46 #define EXTENT_MERGE_SIZE 5
48 #define FE_MAPPED_PERMS (FE_PERM_U_READ | FE_PERM_U_WRITE | FE_PERM_U_EXEC | \
49 FE_PERM_G_READ | FE_PERM_G_WRITE | FE_PERM_G_EXEC | \
50 FE_PERM_O_READ | FE_PERM_O_WRITE | FE_PERM_O_EXEC)
52 #define FE_DELETE_PERMS (FE_PERM_U_DELETE | FE_PERM_G_DELETE | \
55 static umode_t udf_convert_permissions(struct fileEntry *);
56 static int udf_update_inode(struct inode *, int);
57 static int udf_sync_inode(struct inode *inode);
58 static int udf_alloc_i_data(struct inode *inode, size_t size);
59 static sector_t inode_getblk(struct inode *, sector_t, int *, int *);
60 static int udf_insert_aext(struct inode *, struct extent_position,
61 struct kernel_lb_addr, uint32_t);
62 static void udf_split_extents(struct inode *, int *, int, udf_pblk_t,
63 struct kernel_long_ad *, int *);
64 static void udf_prealloc_extents(struct inode *, int, int,
65 struct kernel_long_ad *, int *);
66 static void udf_merge_extents(struct inode *, struct kernel_long_ad *, int *);
67 static int udf_update_extents(struct inode *, struct kernel_long_ad *, int,
68 int, struct extent_position *);
69 static int udf_get_block(struct inode *, sector_t, struct buffer_head *, int);
71 static void __udf_clear_extent_cache(struct inode *inode)
73 struct udf_inode_info *iinfo = UDF_I(inode);
75 if (iinfo->cached_extent.lstart != -1) {
76 brelse(iinfo->cached_extent.epos.bh);
77 iinfo->cached_extent.lstart = -1;
81 /* Invalidate extent cache */
82 static void udf_clear_extent_cache(struct inode *inode)
84 struct udf_inode_info *iinfo = UDF_I(inode);
86 spin_lock(&iinfo->i_extent_cache_lock);
87 __udf_clear_extent_cache(inode);
88 spin_unlock(&iinfo->i_extent_cache_lock);
91 /* Return contents of extent cache */
92 static int udf_read_extent_cache(struct inode *inode, loff_t bcount,
93 loff_t *lbcount, struct extent_position *pos)
95 struct udf_inode_info *iinfo = UDF_I(inode);
98 spin_lock(&iinfo->i_extent_cache_lock);
99 if ((iinfo->cached_extent.lstart <= bcount) &&
100 (iinfo->cached_extent.lstart != -1)) {
102 *lbcount = iinfo->cached_extent.lstart;
103 memcpy(pos, &iinfo->cached_extent.epos,
104 sizeof(struct extent_position));
109 spin_unlock(&iinfo->i_extent_cache_lock);
113 /* Add extent to extent cache */
114 static void udf_update_extent_cache(struct inode *inode, loff_t estart,
115 struct extent_position *pos)
117 struct udf_inode_info *iinfo = UDF_I(inode);
119 spin_lock(&iinfo->i_extent_cache_lock);
120 /* Invalidate previously cached extent */
121 __udf_clear_extent_cache(inode);
124 memcpy(&iinfo->cached_extent.epos, pos, sizeof(*pos));
125 iinfo->cached_extent.lstart = estart;
126 switch (iinfo->i_alloc_type) {
127 case ICBTAG_FLAG_AD_SHORT:
128 iinfo->cached_extent.epos.offset -= sizeof(struct short_ad);
130 case ICBTAG_FLAG_AD_LONG:
131 iinfo->cached_extent.epos.offset -= sizeof(struct long_ad);
134 spin_unlock(&iinfo->i_extent_cache_lock);
137 void udf_evict_inode(struct inode *inode)
139 struct udf_inode_info *iinfo = UDF_I(inode);
142 if (!is_bad_inode(inode)) {
143 if (!inode->i_nlink) {
145 udf_setsize(inode, 0);
146 udf_update_inode(inode, IS_SYNC(inode));
148 if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB &&
149 inode->i_size != iinfo->i_lenExtents) {
150 udf_warn(inode->i_sb,
151 "Inode %lu (mode %o) has inode size %llu different from extent length %llu. Filesystem need not be standards compliant.\n",
152 inode->i_ino, inode->i_mode,
153 (unsigned long long)inode->i_size,
154 (unsigned long long)iinfo->i_lenExtents);
157 truncate_inode_pages_final(&inode->i_data);
158 invalidate_inode_buffers(inode);
160 kfree(iinfo->i_data);
161 iinfo->i_data = NULL;
162 udf_clear_extent_cache(inode);
164 udf_free_inode(inode);
168 static void udf_write_failed(struct address_space *mapping, loff_t to)
170 struct inode *inode = mapping->host;
171 struct udf_inode_info *iinfo = UDF_I(inode);
172 loff_t isize = inode->i_size;
175 truncate_pagecache(inode, isize);
176 if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
177 down_write(&iinfo->i_data_sem);
178 udf_clear_extent_cache(inode);
179 udf_truncate_extents(inode);
180 up_write(&iinfo->i_data_sem);
185 static int udf_writepage(struct page *page, struct writeback_control *wbc)
187 return block_write_full_page(page, udf_get_block, wbc);
190 static int udf_writepages(struct address_space *mapping,
191 struct writeback_control *wbc)
193 return mpage_writepages(mapping, wbc, udf_get_block);
196 static int udf_read_folio(struct file *file, struct folio *folio)
198 return mpage_read_folio(folio, udf_get_block);
201 static void udf_readahead(struct readahead_control *rac)
203 mpage_readahead(rac, udf_get_block);
206 static int udf_write_begin(struct file *file, struct address_space *mapping,
207 loff_t pos, unsigned len,
208 struct page **pagep, void **fsdata)
212 ret = block_write_begin(mapping, pos, len, pagep, udf_get_block);
214 udf_write_failed(mapping, pos + len);
218 static ssize_t udf_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
220 struct file *file = iocb->ki_filp;
221 struct address_space *mapping = file->f_mapping;
222 struct inode *inode = mapping->host;
223 size_t count = iov_iter_count(iter);
226 ret = blockdev_direct_IO(iocb, inode, iter, udf_get_block);
227 if (unlikely(ret < 0 && iov_iter_rw(iter) == WRITE))
228 udf_write_failed(mapping, iocb->ki_pos + count);
232 static sector_t udf_bmap(struct address_space *mapping, sector_t block)
234 return generic_block_bmap(mapping, block, udf_get_block);
237 const struct address_space_operations udf_aops = {
238 .dirty_folio = block_dirty_folio,
239 .invalidate_folio = block_invalidate_folio,
240 .read_folio = udf_read_folio,
241 .readahead = udf_readahead,
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)) {
286 kaddr = kmap_atomic(page);
287 memset(kaddr + iinfo->i_lenAlloc, 0x00,
288 PAGE_SIZE - iinfo->i_lenAlloc);
289 memcpy(kaddr, iinfo->i_data + iinfo->i_lenEAttr,
291 flush_dcache_page(page);
292 SetPageUptodate(page);
293 kunmap_atomic(kaddr);
295 down_write(&iinfo->i_data_sem);
296 memset(iinfo->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... */
312 down_write(&iinfo->i_data_sem);
313 kaddr = kmap_atomic(page);
314 memcpy(iinfo->i_data + iinfo->i_lenEAttr, kaddr, inode->i_size);
315 kunmap_atomic(kaddr);
317 iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB;
318 inode->i_data.a_ops = &udf_adinicb_aops;
319 iinfo->i_lenAlloc = inode->i_size;
320 up_write(&iinfo->i_data_sem);
323 mark_inode_dirty(inode);
328 struct buffer_head *udf_expand_dir_adinicb(struct inode *inode,
329 udf_pblk_t *block, int *err)
332 struct buffer_head *dbh = NULL;
333 struct kernel_lb_addr eloc;
335 struct extent_position epos;
337 struct udf_fileident_bh sfibh, dfibh;
338 loff_t f_pos = udf_ext0_offset(inode);
339 int size = udf_ext0_offset(inode) + inode->i_size;
340 struct fileIdentDesc cfi, *sfi, *dfi;
341 struct udf_inode_info *iinfo = UDF_I(inode);
343 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))
344 alloctype = ICBTAG_FLAG_AD_SHORT;
346 alloctype = ICBTAG_FLAG_AD_LONG;
348 if (!inode->i_size) {
349 iinfo->i_alloc_type = alloctype;
350 mark_inode_dirty(inode);
354 /* alloc block, and copy data to it */
355 *block = udf_new_block(inode->i_sb, inode,
356 iinfo->i_location.partitionReferenceNum,
357 iinfo->i_location.logicalBlockNum, err);
360 newblock = udf_get_pblock(inode->i_sb, *block,
361 iinfo->i_location.partitionReferenceNum,
365 dbh = udf_tgetblk(inode->i_sb, newblock);
369 memset(dbh->b_data, 0x00, inode->i_sb->s_blocksize);
370 set_buffer_uptodate(dbh);
372 mark_buffer_dirty_inode(dbh, inode);
374 sfibh.soffset = sfibh.eoffset =
375 f_pos & (inode->i_sb->s_blocksize - 1);
376 sfibh.sbh = sfibh.ebh = NULL;
377 dfibh.soffset = dfibh.eoffset = 0;
378 dfibh.sbh = dfibh.ebh = dbh;
379 while (f_pos < size) {
380 iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB;
381 sfi = udf_fileident_read(inode, &f_pos, &sfibh, &cfi, NULL,
387 iinfo->i_alloc_type = alloctype;
388 sfi->descTag.tagLocation = cpu_to_le32(*block);
389 dfibh.soffset = dfibh.eoffset;
390 dfibh.eoffset += (sfibh.eoffset - sfibh.soffset);
391 dfi = (struct fileIdentDesc *)(dbh->b_data + dfibh.soffset);
392 if (udf_write_fi(inode, sfi, dfi, &dfibh, sfi->impUse,
393 udf_get_fi_ident(sfi))) {
394 iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB;
399 mark_buffer_dirty_inode(dbh, inode);
401 memset(iinfo->i_data + iinfo->i_lenEAttr, 0, iinfo->i_lenAlloc);
402 iinfo->i_lenAlloc = 0;
403 eloc.logicalBlockNum = *block;
404 eloc.partitionReferenceNum =
405 iinfo->i_location.partitionReferenceNum;
406 iinfo->i_lenExtents = inode->i_size;
408 epos.block = iinfo->i_location;
409 epos.offset = udf_file_entry_alloc_offset(inode);
410 udf_add_aext(inode, &epos, &eloc, inode->i_size, 0);
414 mark_inode_dirty(inode);
418 static int udf_get_block(struct inode *inode, sector_t block,
419 struct buffer_head *bh_result, int create)
423 struct udf_inode_info *iinfo;
426 phys = udf_block_map(inode, block);
428 map_bh(bh_result, inode->i_sb, phys);
434 iinfo = UDF_I(inode);
436 down_write(&iinfo->i_data_sem);
437 if (block == iinfo->i_next_alloc_block + 1) {
438 iinfo->i_next_alloc_block++;
439 iinfo->i_next_alloc_goal++;
443 * Block beyond EOF and prealloc extents? Just discard preallocation
444 * as it is not useful and complicates things.
446 if (((loff_t)block) << inode->i_blkbits >= iinfo->i_lenExtents)
447 udf_discard_prealloc(inode);
448 udf_clear_extent_cache(inode);
449 phys = inode_getblk(inode, block, &err, &new);
454 set_buffer_new(bh_result);
455 map_bh(bh_result, inode->i_sb, phys);
458 up_write(&iinfo->i_data_sem);
462 static struct buffer_head *udf_getblk(struct inode *inode, udf_pblk_t block,
463 int create, int *err)
465 struct buffer_head *bh;
466 struct buffer_head dummy;
469 dummy.b_blocknr = -1000;
470 *err = udf_get_block(inode, block, &dummy, create);
471 if (!*err && buffer_mapped(&dummy)) {
472 bh = sb_getblk(inode->i_sb, dummy.b_blocknr);
473 if (buffer_new(&dummy)) {
475 memset(bh->b_data, 0x00, inode->i_sb->s_blocksize);
476 set_buffer_uptodate(bh);
478 mark_buffer_dirty_inode(bh, inode);
486 /* Extend the file with new blocks totaling 'new_block_bytes',
487 * return the number of extents added
489 static int udf_do_extend_file(struct inode *inode,
490 struct extent_position *last_pos,
491 struct kernel_long_ad *last_ext,
492 loff_t new_block_bytes)
495 int count = 0, fake = !(last_ext->extLength & UDF_EXTENT_LENGTH_MASK);
496 struct super_block *sb = inode->i_sb;
497 struct udf_inode_info *iinfo;
500 /* The previous extent is fake and we should not extend by anything
501 * - there's nothing to do... */
502 if (!new_block_bytes && fake)
505 iinfo = UDF_I(inode);
506 /* Round the last extent up to a multiple of block size */
507 if (last_ext->extLength & (sb->s_blocksize - 1)) {
508 last_ext->extLength =
509 (last_ext->extLength & UDF_EXTENT_FLAG_MASK) |
510 (((last_ext->extLength & UDF_EXTENT_LENGTH_MASK) +
511 sb->s_blocksize - 1) & ~(sb->s_blocksize - 1));
512 iinfo->i_lenExtents =
513 (iinfo->i_lenExtents + sb->s_blocksize - 1) &
514 ~(sb->s_blocksize - 1);
517 /* Can we merge with the previous extent? */
518 if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) ==
519 EXT_NOT_RECORDED_NOT_ALLOCATED) {
520 add = (1 << 30) - sb->s_blocksize -
521 (last_ext->extLength & UDF_EXTENT_LENGTH_MASK);
522 if (add > new_block_bytes)
523 add = new_block_bytes;
524 new_block_bytes -= add;
525 last_ext->extLength += add;
529 err = udf_add_aext(inode, last_pos, &last_ext->extLocation,
530 last_ext->extLength, 1);
535 struct kernel_lb_addr tmploc;
538 udf_write_aext(inode, last_pos, &last_ext->extLocation,
539 last_ext->extLength, 1);
542 * We've rewritten the last extent. If we are going to add
543 * more extents, we may need to enter possible following
544 * empty indirect extent.
547 udf_next_aext(inode, last_pos, &tmploc, &tmplen, 0);
550 /* Managed to do everything necessary? */
551 if (!new_block_bytes)
554 /* All further extents will be NOT_RECORDED_NOT_ALLOCATED */
555 last_ext->extLocation.logicalBlockNum = 0;
556 last_ext->extLocation.partitionReferenceNum = 0;
557 add = (1 << 30) - sb->s_blocksize;
558 last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | add;
560 /* Create enough extents to cover the whole hole */
561 while (new_block_bytes > add) {
562 new_block_bytes -= add;
563 err = udf_add_aext(inode, last_pos, &last_ext->extLocation,
564 last_ext->extLength, 1);
569 if (new_block_bytes) {
570 last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED |
572 err = udf_add_aext(inode, last_pos, &last_ext->extLocation,
573 last_ext->extLength, 1);
580 /* last_pos should point to the last written extent... */
581 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
582 last_pos->offset -= sizeof(struct short_ad);
583 else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
584 last_pos->offset -= sizeof(struct long_ad);
590 /* Remove extents we've created so far */
591 udf_clear_extent_cache(inode);
592 udf_truncate_extents(inode);
596 /* Extend the final block of the file to final_block_len bytes */
597 static void udf_do_extend_final_block(struct inode *inode,
598 struct extent_position *last_pos,
599 struct kernel_long_ad *last_ext,
602 uint32_t added_bytes;
605 * Extent already large enough? It may be already rounded up to block
608 if (new_elen <= (last_ext->extLength & UDF_EXTENT_LENGTH_MASK))
610 added_bytes = new_elen - (last_ext->extLength & UDF_EXTENT_LENGTH_MASK);
611 last_ext->extLength += added_bytes;
612 UDF_I(inode)->i_lenExtents += added_bytes;
614 udf_write_aext(inode, last_pos, &last_ext->extLocation,
615 last_ext->extLength, 1);
618 static int udf_extend_file(struct inode *inode, loff_t newsize)
621 struct extent_position epos;
622 struct kernel_lb_addr eloc;
625 struct super_block *sb = inode->i_sb;
626 sector_t first_block = newsize >> sb->s_blocksize_bits, offset;
629 struct udf_inode_info *iinfo = UDF_I(inode);
630 struct kernel_long_ad extent;
632 bool within_last_ext;
634 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
635 adsize = sizeof(struct short_ad);
636 else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
637 adsize = sizeof(struct long_ad);
642 * When creating hole in file, just don't bother with preserving
643 * preallocation. It likely won't be very useful anyway.
645 udf_discard_prealloc(inode);
647 etype = inode_bmap(inode, first_block, &epos, &eloc, &elen, &offset);
648 within_last_ext = (etype != -1);
649 /* We don't expect extents past EOF... */
650 WARN_ON_ONCE(within_last_ext &&
651 elen > ((loff_t)offset + 1) << inode->i_blkbits);
653 if ((!epos.bh && epos.offset == udf_file_entry_alloc_offset(inode)) ||
654 (epos.bh && epos.offset == sizeof(struct allocExtDesc))) {
655 /* File has no extents at all or has empty last
656 * indirect extent! Create a fake extent... */
657 extent.extLocation.logicalBlockNum = 0;
658 extent.extLocation.partitionReferenceNum = 0;
659 extent.extLength = EXT_NOT_RECORDED_NOT_ALLOCATED;
661 epos.offset -= adsize;
662 etype = udf_next_aext(inode, &epos, &extent.extLocation,
663 &extent.extLength, 0);
664 extent.extLength |= etype << 30;
667 new_elen = ((loff_t)offset << inode->i_blkbits) |
668 (newsize & (sb->s_blocksize - 1));
670 /* File has extent covering the new size (could happen when extending
673 if (within_last_ext) {
674 /* Extending file within the last file block */
675 udf_do_extend_final_block(inode, &epos, &extent, new_elen);
677 err = udf_do_extend_file(inode, &epos, &extent, new_elen);
683 iinfo->i_lenExtents = newsize;
689 static sector_t inode_getblk(struct inode *inode, sector_t block,
692 struct kernel_long_ad laarr[EXTENT_MERGE_SIZE];
693 struct extent_position prev_epos, cur_epos, next_epos;
694 int count = 0, startnum = 0, endnum = 0;
695 uint32_t elen = 0, tmpelen;
696 struct kernel_lb_addr eloc, tmpeloc;
698 loff_t lbcount = 0, b_off = 0;
699 udf_pblk_t newblocknum, newblock = 0;
702 struct udf_inode_info *iinfo = UDF_I(inode);
703 udf_pblk_t goal = 0, pgoal = iinfo->i_location.logicalBlockNum;
709 prev_epos.offset = udf_file_entry_alloc_offset(inode);
710 prev_epos.block = iinfo->i_location;
712 cur_epos = next_epos = prev_epos;
713 b_off = (loff_t)block << inode->i_sb->s_blocksize_bits;
715 /* find the extent which contains the block we are looking for.
716 alternate between laarr[0] and laarr[1] for locations of the
717 current extent, and the previous extent */
719 if (prev_epos.bh != cur_epos.bh) {
720 brelse(prev_epos.bh);
722 prev_epos.bh = cur_epos.bh;
724 if (cur_epos.bh != next_epos.bh) {
726 get_bh(next_epos.bh);
727 cur_epos.bh = next_epos.bh;
732 prev_epos.block = cur_epos.block;
733 cur_epos.block = next_epos.block;
735 prev_epos.offset = cur_epos.offset;
736 cur_epos.offset = next_epos.offset;
738 etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 1);
744 laarr[c].extLength = (etype << 30) | elen;
745 laarr[c].extLocation = eloc;
747 if (etype != (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))
748 pgoal = eloc.logicalBlockNum +
749 ((elen + inode->i_sb->s_blocksize - 1) >>
750 inode->i_sb->s_blocksize_bits);
753 } while (lbcount + elen <= b_off);
756 offset = b_off >> inode->i_sb->s_blocksize_bits;
758 * Move prev_epos and cur_epos into indirect extent if we are at
761 udf_next_aext(inode, &prev_epos, &tmpeloc, &tmpelen, 0);
762 udf_next_aext(inode, &cur_epos, &tmpeloc, &tmpelen, 0);
764 /* if the extent is allocated and recorded, return the block
765 if the extent is not a multiple of the blocksize, round up */
767 if (etype == (EXT_RECORDED_ALLOCATED >> 30)) {
768 if (elen & (inode->i_sb->s_blocksize - 1)) {
769 elen = EXT_RECORDED_ALLOCATED |
770 ((elen + inode->i_sb->s_blocksize - 1) &
771 ~(inode->i_sb->s_blocksize - 1));
772 udf_write_aext(inode, &cur_epos, &eloc, elen, 1);
774 newblock = udf_get_lb_pblock(inode->i_sb, &eloc, offset);
778 /* Are we beyond EOF and preallocated extent? */
789 /* Create a fake extent when there's not one */
790 memset(&laarr[0].extLocation, 0x00,
791 sizeof(struct kernel_lb_addr));
792 laarr[0].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED;
793 /* Will udf_do_extend_file() create real extent from
795 startnum = (offset > 0);
797 /* Create extents for the hole between EOF and offset */
798 hole_len = (loff_t)offset << inode->i_blkbits;
799 ret = udf_do_extend_file(inode, &prev_epos, laarr, hole_len);
808 * Is there any real extent? - otherwise we overwrite the fake
813 laarr[c].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED |
814 inode->i_sb->s_blocksize;
815 memset(&laarr[c].extLocation, 0x00,
816 sizeof(struct kernel_lb_addr));
822 endnum = startnum = ((count > 2) ? 2 : count);
824 /* if the current extent is in position 0,
825 swap it with the previous */
826 if (!c && count != 1) {
833 /* if the current block is located in an extent,
834 read the next extent */
835 etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 0);
837 laarr[c + 1].extLength = (etype << 30) | elen;
838 laarr[c + 1].extLocation = eloc;
846 /* if the current extent is not recorded but allocated, get the
847 * block in the extent corresponding to the requested block */
848 if ((laarr[c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30))
849 newblocknum = laarr[c].extLocation.logicalBlockNum + offset;
850 else { /* otherwise, allocate a new block */
851 if (iinfo->i_next_alloc_block == block)
852 goal = iinfo->i_next_alloc_goal;
855 if (!(goal = pgoal)) /* XXX: what was intended here? */
856 goal = iinfo->i_location.logicalBlockNum + 1;
859 newblocknum = udf_new_block(inode->i_sb, inode,
860 iinfo->i_location.partitionReferenceNum,
867 iinfo->i_lenExtents += inode->i_sb->s_blocksize;
870 /* if the extent the requsted block is located in contains multiple
871 * blocks, split the extent into at most three extents. blocks prior
872 * to requested block, requested block, and blocks after requested
874 udf_split_extents(inode, &c, offset, newblocknum, laarr, &endnum);
876 /* We preallocate blocks only for regular files. It also makes sense
877 * for directories but there's a problem when to drop the
878 * preallocation. We might use some delayed work for that but I feel
879 * it's overengineering for a filesystem like UDF. */
880 if (S_ISREG(inode->i_mode))
881 udf_prealloc_extents(inode, c, lastblock, laarr, &endnum);
883 /* merge any continuous blocks in laarr */
884 udf_merge_extents(inode, laarr, &endnum);
886 /* write back the new extents, inserting new extents if the new number
887 * of extents is greater than the old number, and deleting extents if
888 * the new number of extents is less than the old number */
889 *err = udf_update_extents(inode, laarr, startnum, endnum, &prev_epos);
893 newblock = udf_get_pblock(inode->i_sb, newblocknum,
894 iinfo->i_location.partitionReferenceNum, 0);
900 iinfo->i_next_alloc_block = block;
901 iinfo->i_next_alloc_goal = newblocknum;
902 inode->i_ctime = current_time(inode);
905 udf_sync_inode(inode);
907 mark_inode_dirty(inode);
909 brelse(prev_epos.bh);
911 brelse(next_epos.bh);
915 static void udf_split_extents(struct inode *inode, int *c, int offset,
916 udf_pblk_t newblocknum,
917 struct kernel_long_ad *laarr, int *endnum)
919 unsigned long blocksize = inode->i_sb->s_blocksize;
920 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits;
922 if ((laarr[*c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30) ||
923 (laarr[*c].extLength >> 30) ==
924 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) {
926 int blen = ((laarr[curr].extLength & UDF_EXTENT_LENGTH_MASK) +
927 blocksize - 1) >> blocksize_bits;
928 int8_t etype = (laarr[curr].extLength >> 30);
932 else if (!offset || blen == offset + 1) {
933 laarr[curr + 2] = laarr[curr + 1];
934 laarr[curr + 1] = laarr[curr];
936 laarr[curr + 3] = laarr[curr + 1];
937 laarr[curr + 2] = laarr[curr + 1] = laarr[curr];
941 if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30)) {
942 udf_free_blocks(inode->i_sb, inode,
943 &laarr[curr].extLocation,
945 laarr[curr].extLength =
946 EXT_NOT_RECORDED_NOT_ALLOCATED |
947 (offset << blocksize_bits);
948 laarr[curr].extLocation.logicalBlockNum = 0;
949 laarr[curr].extLocation.
950 partitionReferenceNum = 0;
952 laarr[curr].extLength = (etype << 30) |
953 (offset << blocksize_bits);
959 laarr[curr].extLocation.logicalBlockNum = newblocknum;
960 if (etype == (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))
961 laarr[curr].extLocation.partitionReferenceNum =
962 UDF_I(inode)->i_location.partitionReferenceNum;
963 laarr[curr].extLength = EXT_RECORDED_ALLOCATED |
967 if (blen != offset + 1) {
968 if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30))
969 laarr[curr].extLocation.logicalBlockNum +=
971 laarr[curr].extLength = (etype << 30) |
972 ((blen - (offset + 1)) << blocksize_bits);
979 static void udf_prealloc_extents(struct inode *inode, int c, int lastblock,
980 struct kernel_long_ad *laarr,
983 int start, length = 0, currlength = 0, i;
985 if (*endnum >= (c + 1)) {
991 if ((laarr[c + 1].extLength >> 30) ==
992 (EXT_NOT_RECORDED_ALLOCATED >> 30)) {
994 length = currlength =
995 (((laarr[c + 1].extLength &
996 UDF_EXTENT_LENGTH_MASK) +
997 inode->i_sb->s_blocksize - 1) >>
998 inode->i_sb->s_blocksize_bits);
1003 for (i = start + 1; i <= *endnum; i++) {
1006 length += UDF_DEFAULT_PREALLOC_BLOCKS;
1007 } else if ((laarr[i].extLength >> 30) ==
1008 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) {
1009 length += (((laarr[i].extLength &
1010 UDF_EXTENT_LENGTH_MASK) +
1011 inode->i_sb->s_blocksize - 1) >>
1012 inode->i_sb->s_blocksize_bits);
1018 int next = laarr[start].extLocation.logicalBlockNum +
1019 (((laarr[start].extLength & UDF_EXTENT_LENGTH_MASK) +
1020 inode->i_sb->s_blocksize - 1) >>
1021 inode->i_sb->s_blocksize_bits);
1022 int numalloc = udf_prealloc_blocks(inode->i_sb, inode,
1023 laarr[start].extLocation.partitionReferenceNum,
1024 next, (UDF_DEFAULT_PREALLOC_BLOCKS > length ?
1025 length : UDF_DEFAULT_PREALLOC_BLOCKS) -
1028 if (start == (c + 1))
1029 laarr[start].extLength +=
1031 inode->i_sb->s_blocksize_bits);
1033 memmove(&laarr[c + 2], &laarr[c + 1],
1034 sizeof(struct long_ad) * (*endnum - (c + 1)));
1036 laarr[c + 1].extLocation.logicalBlockNum = next;
1037 laarr[c + 1].extLocation.partitionReferenceNum =
1038 laarr[c].extLocation.
1039 partitionReferenceNum;
1040 laarr[c + 1].extLength =
1041 EXT_NOT_RECORDED_ALLOCATED |
1043 inode->i_sb->s_blocksize_bits);
1047 for (i = start + 1; numalloc && i < *endnum; i++) {
1048 int elen = ((laarr[i].extLength &
1049 UDF_EXTENT_LENGTH_MASK) +
1050 inode->i_sb->s_blocksize - 1) >>
1051 inode->i_sb->s_blocksize_bits;
1053 if (elen > numalloc) {
1054 laarr[i].extLength -=
1056 inode->i_sb->s_blocksize_bits);
1060 if (*endnum > (i + 1))
1063 sizeof(struct long_ad) *
1064 (*endnum - (i + 1)));
1069 UDF_I(inode)->i_lenExtents +=
1070 numalloc << inode->i_sb->s_blocksize_bits;
1075 static void udf_merge_extents(struct inode *inode, struct kernel_long_ad *laarr,
1079 unsigned long blocksize = inode->i_sb->s_blocksize;
1080 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits;
1082 for (i = 0; i < (*endnum - 1); i++) {
1083 struct kernel_long_ad *li /*l[i]*/ = &laarr[i];
1084 struct kernel_long_ad *lip1 /*l[i plus 1]*/ = &laarr[i + 1];
1086 if (((li->extLength >> 30) == (lip1->extLength >> 30)) &&
1087 (((li->extLength >> 30) ==
1088 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) ||
1089 ((lip1->extLocation.logicalBlockNum -
1090 li->extLocation.logicalBlockNum) ==
1091 (((li->extLength & UDF_EXTENT_LENGTH_MASK) +
1092 blocksize - 1) >> blocksize_bits)))) {
1094 if (((li->extLength & UDF_EXTENT_LENGTH_MASK) +
1095 (lip1->extLength & UDF_EXTENT_LENGTH_MASK) +
1096 blocksize - 1) <= UDF_EXTENT_LENGTH_MASK) {
1097 li->extLength = lip1->extLength +
1099 UDF_EXTENT_LENGTH_MASK) +
1100 blocksize - 1) & ~(blocksize - 1));
1101 if (*endnum > (i + 2))
1102 memmove(&laarr[i + 1], &laarr[i + 2],
1103 sizeof(struct long_ad) *
1104 (*endnum - (i + 2)));
1108 } else if (((li->extLength >> 30) ==
1109 (EXT_NOT_RECORDED_ALLOCATED >> 30)) &&
1110 ((lip1->extLength >> 30) ==
1111 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))) {
1112 udf_free_blocks(inode->i_sb, inode, &li->extLocation, 0,
1114 UDF_EXTENT_LENGTH_MASK) +
1115 blocksize - 1) >> blocksize_bits);
1116 li->extLocation.logicalBlockNum = 0;
1117 li->extLocation.partitionReferenceNum = 0;
1119 if (((li->extLength & UDF_EXTENT_LENGTH_MASK) +
1120 (lip1->extLength & UDF_EXTENT_LENGTH_MASK) +
1121 blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) {
1122 lip1->extLength = (lip1->extLength -
1124 UDF_EXTENT_LENGTH_MASK) +
1125 UDF_EXTENT_LENGTH_MASK) &
1127 li->extLength = (li->extLength &
1128 UDF_EXTENT_FLAG_MASK) +
1129 (UDF_EXTENT_LENGTH_MASK + 1) -
1132 li->extLength = lip1->extLength +
1134 UDF_EXTENT_LENGTH_MASK) +
1135 blocksize - 1) & ~(blocksize - 1));
1136 if (*endnum > (i + 2))
1137 memmove(&laarr[i + 1], &laarr[i + 2],
1138 sizeof(struct long_ad) *
1139 (*endnum - (i + 2)));
1143 } else if ((li->extLength >> 30) ==
1144 (EXT_NOT_RECORDED_ALLOCATED >> 30)) {
1145 udf_free_blocks(inode->i_sb, inode,
1146 &li->extLocation, 0,
1148 UDF_EXTENT_LENGTH_MASK) +
1149 blocksize - 1) >> blocksize_bits);
1150 li->extLocation.logicalBlockNum = 0;
1151 li->extLocation.partitionReferenceNum = 0;
1152 li->extLength = (li->extLength &
1153 UDF_EXTENT_LENGTH_MASK) |
1154 EXT_NOT_RECORDED_NOT_ALLOCATED;
1159 static int udf_update_extents(struct inode *inode, struct kernel_long_ad *laarr,
1160 int startnum, int endnum,
1161 struct extent_position *epos)
1164 struct kernel_lb_addr tmploc;
1168 if (startnum > endnum) {
1169 for (i = 0; i < (startnum - endnum); i++)
1170 udf_delete_aext(inode, *epos);
1171 } else if (startnum < endnum) {
1172 for (i = 0; i < (endnum - startnum); i++) {
1173 err = udf_insert_aext(inode, *epos,
1174 laarr[i].extLocation,
1175 laarr[i].extLength);
1177 * If we fail here, we are likely corrupting the extent
1178 * list and leaking blocks. At least stop early to
1183 udf_next_aext(inode, epos, &laarr[i].extLocation,
1184 &laarr[i].extLength, 1);
1189 for (i = start; i < endnum; i++) {
1190 udf_next_aext(inode, epos, &tmploc, &tmplen, 0);
1191 udf_write_aext(inode, epos, &laarr[i].extLocation,
1192 laarr[i].extLength, 1);
1197 struct buffer_head *udf_bread(struct inode *inode, udf_pblk_t block,
1198 int create, int *err)
1200 struct buffer_head *bh = NULL;
1202 bh = udf_getblk(inode, block, create, err);
1206 if (bh_read(bh, 0) >= 0)
1214 int udf_setsize(struct inode *inode, loff_t newsize)
1217 struct udf_inode_info *iinfo;
1218 unsigned int bsize = i_blocksize(inode);
1220 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
1221 S_ISLNK(inode->i_mode)))
1223 if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
1226 iinfo = UDF_I(inode);
1227 if (newsize > inode->i_size) {
1228 down_write(&iinfo->i_data_sem);
1229 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
1231 (udf_file_entry_alloc_offset(inode) + newsize)) {
1232 err = udf_expand_file_adinicb(inode);
1235 down_write(&iinfo->i_data_sem);
1237 iinfo->i_lenAlloc = newsize;
1241 err = udf_extend_file(inode, newsize);
1243 up_write(&iinfo->i_data_sem);
1247 up_write(&iinfo->i_data_sem);
1248 truncate_setsize(inode, newsize);
1250 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
1251 down_write(&iinfo->i_data_sem);
1252 udf_clear_extent_cache(inode);
1253 memset(iinfo->i_data + iinfo->i_lenEAttr + newsize,
1254 0x00, bsize - newsize -
1255 udf_file_entry_alloc_offset(inode));
1256 iinfo->i_lenAlloc = newsize;
1257 truncate_setsize(inode, newsize);
1258 up_write(&iinfo->i_data_sem);
1261 err = block_truncate_page(inode->i_mapping, newsize,
1265 truncate_setsize(inode, newsize);
1266 down_write(&iinfo->i_data_sem);
1267 udf_clear_extent_cache(inode);
1268 err = udf_truncate_extents(inode);
1269 up_write(&iinfo->i_data_sem);
1274 inode->i_mtime = inode->i_ctime = current_time(inode);
1276 udf_sync_inode(inode);
1278 mark_inode_dirty(inode);
1283 * Maximum length of linked list formed by ICB hierarchy. The chosen number is
1284 * arbitrary - just that we hopefully don't limit any real use of rewritten
1285 * inode on write-once media but avoid looping for too long on corrupted media.
1287 #define UDF_MAX_ICB_NESTING 1024
1289 static int udf_read_inode(struct inode *inode, bool hidden_inode)
1291 struct buffer_head *bh = NULL;
1292 struct fileEntry *fe;
1293 struct extendedFileEntry *efe;
1295 struct udf_inode_info *iinfo = UDF_I(inode);
1296 struct udf_sb_info *sbi = UDF_SB(inode->i_sb);
1297 struct kernel_lb_addr *iloc = &iinfo->i_location;
1298 unsigned int link_count;
1299 unsigned int indirections = 0;
1300 int bs = inode->i_sb->s_blocksize;
1305 if (iloc->partitionReferenceNum >= sbi->s_partitions) {
1306 udf_debug("partition reference: %u > logical volume partitions: %u\n",
1307 iloc->partitionReferenceNum, sbi->s_partitions);
1311 if (iloc->logicalBlockNum >=
1312 sbi->s_partmaps[iloc->partitionReferenceNum].s_partition_len) {
1313 udf_debug("block=%u, partition=%u out of range\n",
1314 iloc->logicalBlockNum, iloc->partitionReferenceNum);
1319 * Set defaults, but the inode is still incomplete!
1320 * Note: get_new_inode() sets the following on a new inode:
1323 * i_flags = sb->s_flags
1325 * clean_inode(): zero fills and sets
1330 bh = udf_read_ptagged(inode->i_sb, iloc, 0, &ident);
1332 udf_err(inode->i_sb, "(ino %lu) failed !bh\n", inode->i_ino);
1336 if (ident != TAG_IDENT_FE && ident != TAG_IDENT_EFE &&
1337 ident != TAG_IDENT_USE) {
1338 udf_err(inode->i_sb, "(ino %lu) failed ident=%u\n",
1339 inode->i_ino, ident);
1343 fe = (struct fileEntry *)bh->b_data;
1344 efe = (struct extendedFileEntry *)bh->b_data;
1346 if (fe->icbTag.strategyType == cpu_to_le16(4096)) {
1347 struct buffer_head *ibh;
1349 ibh = udf_read_ptagged(inode->i_sb, iloc, 1, &ident);
1350 if (ident == TAG_IDENT_IE && ibh) {
1351 struct kernel_lb_addr loc;
1352 struct indirectEntry *ie;
1354 ie = (struct indirectEntry *)ibh->b_data;
1355 loc = lelb_to_cpu(ie->indirectICB.extLocation);
1357 if (ie->indirectICB.extLength) {
1359 memcpy(&iinfo->i_location, &loc,
1360 sizeof(struct kernel_lb_addr));
1361 if (++indirections > UDF_MAX_ICB_NESTING) {
1362 udf_err(inode->i_sb,
1363 "too many ICBs in ICB hierarchy"
1364 " (max %d supported)\n",
1365 UDF_MAX_ICB_NESTING);
1373 } else if (fe->icbTag.strategyType != cpu_to_le16(4)) {
1374 udf_err(inode->i_sb, "unsupported strategy type: %u\n",
1375 le16_to_cpu(fe->icbTag.strategyType));
1378 if (fe->icbTag.strategyType == cpu_to_le16(4))
1379 iinfo->i_strat4096 = 0;
1380 else /* if (fe->icbTag.strategyType == cpu_to_le16(4096)) */
1381 iinfo->i_strat4096 = 1;
1383 iinfo->i_alloc_type = le16_to_cpu(fe->icbTag.flags) &
1384 ICBTAG_FLAG_AD_MASK;
1385 if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_SHORT &&
1386 iinfo->i_alloc_type != ICBTAG_FLAG_AD_LONG &&
1387 iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
1391 iinfo->i_hidden = hidden_inode;
1392 iinfo->i_unique = 0;
1393 iinfo->i_lenEAttr = 0;
1394 iinfo->i_lenExtents = 0;
1395 iinfo->i_lenAlloc = 0;
1396 iinfo->i_next_alloc_block = 0;
1397 iinfo->i_next_alloc_goal = 0;
1398 if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_EFE)) {
1401 ret = udf_alloc_i_data(inode, bs -
1402 sizeof(struct extendedFileEntry));
1405 memcpy(iinfo->i_data,
1406 bh->b_data + sizeof(struct extendedFileEntry),
1407 bs - sizeof(struct extendedFileEntry));
1408 } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_FE)) {
1411 ret = udf_alloc_i_data(inode, bs - sizeof(struct fileEntry));
1414 memcpy(iinfo->i_data,
1415 bh->b_data + sizeof(struct fileEntry),
1416 bs - sizeof(struct fileEntry));
1417 } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_USE)) {
1420 iinfo->i_lenAlloc = le32_to_cpu(
1421 ((struct unallocSpaceEntry *)bh->b_data)->
1423 ret = udf_alloc_i_data(inode, bs -
1424 sizeof(struct unallocSpaceEntry));
1427 memcpy(iinfo->i_data,
1428 bh->b_data + sizeof(struct unallocSpaceEntry),
1429 bs - sizeof(struct unallocSpaceEntry));
1434 read_lock(&sbi->s_cred_lock);
1435 uid = le32_to_cpu(fe->uid);
1436 if (uid == UDF_INVALID_ID ||
1437 UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_SET))
1438 inode->i_uid = sbi->s_uid;
1440 i_uid_write(inode, uid);
1442 gid = le32_to_cpu(fe->gid);
1443 if (gid == UDF_INVALID_ID ||
1444 UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_SET))
1445 inode->i_gid = sbi->s_gid;
1447 i_gid_write(inode, gid);
1449 if (fe->icbTag.fileType != ICBTAG_FILE_TYPE_DIRECTORY &&
1450 sbi->s_fmode != UDF_INVALID_MODE)
1451 inode->i_mode = sbi->s_fmode;
1452 else if (fe->icbTag.fileType == ICBTAG_FILE_TYPE_DIRECTORY &&
1453 sbi->s_dmode != UDF_INVALID_MODE)
1454 inode->i_mode = sbi->s_dmode;
1456 inode->i_mode = udf_convert_permissions(fe);
1457 inode->i_mode &= ~sbi->s_umask;
1458 iinfo->i_extraPerms = le32_to_cpu(fe->permissions) & ~FE_MAPPED_PERMS;
1460 read_unlock(&sbi->s_cred_lock);
1462 link_count = le16_to_cpu(fe->fileLinkCount);
1464 if (!hidden_inode) {
1470 set_nlink(inode, link_count);
1472 inode->i_size = le64_to_cpu(fe->informationLength);
1473 iinfo->i_lenExtents = inode->i_size;
1475 if (iinfo->i_efe == 0) {
1476 inode->i_blocks = le64_to_cpu(fe->logicalBlocksRecorded) <<
1477 (inode->i_sb->s_blocksize_bits - 9);
1479 udf_disk_stamp_to_time(&inode->i_atime, fe->accessTime);
1480 udf_disk_stamp_to_time(&inode->i_mtime, fe->modificationTime);
1481 udf_disk_stamp_to_time(&inode->i_ctime, fe->attrTime);
1483 iinfo->i_unique = le64_to_cpu(fe->uniqueID);
1484 iinfo->i_lenEAttr = le32_to_cpu(fe->lengthExtendedAttr);
1485 iinfo->i_lenAlloc = le32_to_cpu(fe->lengthAllocDescs);
1486 iinfo->i_checkpoint = le32_to_cpu(fe->checkpoint);
1487 iinfo->i_streamdir = 0;
1488 iinfo->i_lenStreams = 0;
1490 inode->i_blocks = le64_to_cpu(efe->logicalBlocksRecorded) <<
1491 (inode->i_sb->s_blocksize_bits - 9);
1493 udf_disk_stamp_to_time(&inode->i_atime, efe->accessTime);
1494 udf_disk_stamp_to_time(&inode->i_mtime, efe->modificationTime);
1495 udf_disk_stamp_to_time(&iinfo->i_crtime, efe->createTime);
1496 udf_disk_stamp_to_time(&inode->i_ctime, efe->attrTime);
1498 iinfo->i_unique = le64_to_cpu(efe->uniqueID);
1499 iinfo->i_lenEAttr = le32_to_cpu(efe->lengthExtendedAttr);
1500 iinfo->i_lenAlloc = le32_to_cpu(efe->lengthAllocDescs);
1501 iinfo->i_checkpoint = le32_to_cpu(efe->checkpoint);
1504 iinfo->i_streamdir = (efe->streamDirectoryICB.extLength != 0);
1505 iinfo->i_locStreamdir =
1506 lelb_to_cpu(efe->streamDirectoryICB.extLocation);
1507 iinfo->i_lenStreams = le64_to_cpu(efe->objectSize);
1508 if (iinfo->i_lenStreams >= inode->i_size)
1509 iinfo->i_lenStreams -= inode->i_size;
1511 iinfo->i_lenStreams = 0;
1513 inode->i_generation = iinfo->i_unique;
1516 * Sanity check length of allocation descriptors and extended attrs to
1517 * avoid integer overflows
1519 if (iinfo->i_lenEAttr > bs || iinfo->i_lenAlloc > bs)
1521 /* Now do exact checks */
1522 if (udf_file_entry_alloc_offset(inode) + iinfo->i_lenAlloc > bs)
1524 /* Sanity checks for files in ICB so that we don't get confused later */
1525 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
1527 * For file in ICB data is stored in allocation descriptor
1528 * so sizes should match
1530 if (iinfo->i_lenAlloc != inode->i_size)
1532 /* File in ICB has to fit in there... */
1533 if (inode->i_size > bs - udf_file_entry_alloc_offset(inode))
1537 switch (fe->icbTag.fileType) {
1538 case ICBTAG_FILE_TYPE_DIRECTORY:
1539 inode->i_op = &udf_dir_inode_operations;
1540 inode->i_fop = &udf_dir_operations;
1541 inode->i_mode |= S_IFDIR;
1544 case ICBTAG_FILE_TYPE_REALTIME:
1545 case ICBTAG_FILE_TYPE_REGULAR:
1546 case ICBTAG_FILE_TYPE_UNDEF:
1547 case ICBTAG_FILE_TYPE_VAT20:
1548 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
1549 inode->i_data.a_ops = &udf_adinicb_aops;
1551 inode->i_data.a_ops = &udf_aops;
1552 inode->i_op = &udf_file_inode_operations;
1553 inode->i_fop = &udf_file_operations;
1554 inode->i_mode |= S_IFREG;
1556 case ICBTAG_FILE_TYPE_BLOCK:
1557 inode->i_mode |= S_IFBLK;
1559 case ICBTAG_FILE_TYPE_CHAR:
1560 inode->i_mode |= S_IFCHR;
1562 case ICBTAG_FILE_TYPE_FIFO:
1563 init_special_inode(inode, inode->i_mode | S_IFIFO, 0);
1565 case ICBTAG_FILE_TYPE_SOCKET:
1566 init_special_inode(inode, inode->i_mode | S_IFSOCK, 0);
1568 case ICBTAG_FILE_TYPE_SYMLINK:
1569 inode->i_data.a_ops = &udf_symlink_aops;
1570 inode->i_op = &udf_symlink_inode_operations;
1571 inode_nohighmem(inode);
1572 inode->i_mode = S_IFLNK | 0777;
1574 case ICBTAG_FILE_TYPE_MAIN:
1575 udf_debug("METADATA FILE-----\n");
1577 case ICBTAG_FILE_TYPE_MIRROR:
1578 udf_debug("METADATA MIRROR FILE-----\n");
1580 case ICBTAG_FILE_TYPE_BITMAP:
1581 udf_debug("METADATA BITMAP FILE-----\n");
1584 udf_err(inode->i_sb, "(ino %lu) failed unknown file type=%u\n",
1585 inode->i_ino, fe->icbTag.fileType);
1588 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
1589 struct deviceSpec *dsea =
1590 (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1);
1592 init_special_inode(inode, inode->i_mode,
1593 MKDEV(le32_to_cpu(dsea->majorDeviceIdent),
1594 le32_to_cpu(dsea->minorDeviceIdent)));
1595 /* Developer ID ??? */
1605 static int udf_alloc_i_data(struct inode *inode, size_t size)
1607 struct udf_inode_info *iinfo = UDF_I(inode);
1608 iinfo->i_data = kmalloc(size, GFP_KERNEL);
1614 static umode_t udf_convert_permissions(struct fileEntry *fe)
1617 uint32_t permissions;
1620 permissions = le32_to_cpu(fe->permissions);
1621 flags = le16_to_cpu(fe->icbTag.flags);
1623 mode = ((permissions) & 0007) |
1624 ((permissions >> 2) & 0070) |
1625 ((permissions >> 4) & 0700) |
1626 ((flags & ICBTAG_FLAG_SETUID) ? S_ISUID : 0) |
1627 ((flags & ICBTAG_FLAG_SETGID) ? S_ISGID : 0) |
1628 ((flags & ICBTAG_FLAG_STICKY) ? S_ISVTX : 0);
1633 void udf_update_extra_perms(struct inode *inode, umode_t mode)
1635 struct udf_inode_info *iinfo = UDF_I(inode);
1638 * UDF 2.01 sec. 3.3.3.3 Note 2:
1639 * In Unix, delete permission tracks write
1641 iinfo->i_extraPerms &= ~FE_DELETE_PERMS;
1643 iinfo->i_extraPerms |= FE_PERM_U_DELETE;
1645 iinfo->i_extraPerms |= FE_PERM_G_DELETE;
1647 iinfo->i_extraPerms |= FE_PERM_O_DELETE;
1650 int udf_write_inode(struct inode *inode, struct writeback_control *wbc)
1652 return udf_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL);
1655 static int udf_sync_inode(struct inode *inode)
1657 return udf_update_inode(inode, 1);
1660 static void udf_adjust_time(struct udf_inode_info *iinfo, struct timespec64 time)
1662 if (iinfo->i_crtime.tv_sec > time.tv_sec ||
1663 (iinfo->i_crtime.tv_sec == time.tv_sec &&
1664 iinfo->i_crtime.tv_nsec > time.tv_nsec))
1665 iinfo->i_crtime = time;
1668 static int udf_update_inode(struct inode *inode, int do_sync)
1670 struct buffer_head *bh = NULL;
1671 struct fileEntry *fe;
1672 struct extendedFileEntry *efe;
1673 uint64_t lb_recorded;
1678 struct udf_sb_info *sbi = UDF_SB(inode->i_sb);
1679 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits;
1680 struct udf_inode_info *iinfo = UDF_I(inode);
1682 bh = udf_tgetblk(inode->i_sb,
1683 udf_get_lb_pblock(inode->i_sb, &iinfo->i_location, 0));
1685 udf_debug("getblk failure\n");
1690 memset(bh->b_data, 0, inode->i_sb->s_blocksize);
1691 fe = (struct fileEntry *)bh->b_data;
1692 efe = (struct extendedFileEntry *)bh->b_data;
1695 struct unallocSpaceEntry *use =
1696 (struct unallocSpaceEntry *)bh->b_data;
1698 use->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc);
1699 memcpy(bh->b_data + sizeof(struct unallocSpaceEntry),
1700 iinfo->i_data, inode->i_sb->s_blocksize -
1701 sizeof(struct unallocSpaceEntry));
1702 use->descTag.tagIdent = cpu_to_le16(TAG_IDENT_USE);
1703 crclen = sizeof(struct unallocSpaceEntry);
1708 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_FORGET))
1709 fe->uid = cpu_to_le32(UDF_INVALID_ID);
1711 fe->uid = cpu_to_le32(i_uid_read(inode));
1713 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_FORGET))
1714 fe->gid = cpu_to_le32(UDF_INVALID_ID);
1716 fe->gid = cpu_to_le32(i_gid_read(inode));
1718 udfperms = ((inode->i_mode & 0007)) |
1719 ((inode->i_mode & 0070) << 2) |
1720 ((inode->i_mode & 0700) << 4);
1722 udfperms |= iinfo->i_extraPerms;
1723 fe->permissions = cpu_to_le32(udfperms);
1725 if (S_ISDIR(inode->i_mode) && inode->i_nlink > 0)
1726 fe->fileLinkCount = cpu_to_le16(inode->i_nlink - 1);
1728 if (iinfo->i_hidden)
1729 fe->fileLinkCount = cpu_to_le16(0);
1731 fe->fileLinkCount = cpu_to_le16(inode->i_nlink);
1734 fe->informationLength = cpu_to_le64(inode->i_size);
1736 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
1738 struct deviceSpec *dsea =
1739 (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1);
1741 dsea = (struct deviceSpec *)
1742 udf_add_extendedattr(inode,
1743 sizeof(struct deviceSpec) +
1744 sizeof(struct regid), 12, 0x3);
1745 dsea->attrType = cpu_to_le32(12);
1746 dsea->attrSubtype = 1;
1747 dsea->attrLength = cpu_to_le32(
1748 sizeof(struct deviceSpec) +
1749 sizeof(struct regid));
1750 dsea->impUseLength = cpu_to_le32(sizeof(struct regid));
1752 eid = (struct regid *)dsea->impUse;
1753 memset(eid, 0, sizeof(*eid));
1754 strcpy(eid->ident, UDF_ID_DEVELOPER);
1755 eid->identSuffix[0] = UDF_OS_CLASS_UNIX;
1756 eid->identSuffix[1] = UDF_OS_ID_LINUX;
1757 dsea->majorDeviceIdent = cpu_to_le32(imajor(inode));
1758 dsea->minorDeviceIdent = cpu_to_le32(iminor(inode));
1761 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
1762 lb_recorded = 0; /* No extents => no blocks! */
1765 (inode->i_blocks + (1 << (blocksize_bits - 9)) - 1) >>
1766 (blocksize_bits - 9);
1768 if (iinfo->i_efe == 0) {
1769 memcpy(bh->b_data + sizeof(struct fileEntry),
1771 inode->i_sb->s_blocksize - sizeof(struct fileEntry));
1772 fe->logicalBlocksRecorded = cpu_to_le64(lb_recorded);
1774 udf_time_to_disk_stamp(&fe->accessTime, inode->i_atime);
1775 udf_time_to_disk_stamp(&fe->modificationTime, inode->i_mtime);
1776 udf_time_to_disk_stamp(&fe->attrTime, inode->i_ctime);
1777 memset(&(fe->impIdent), 0, sizeof(struct regid));
1778 strcpy(fe->impIdent.ident, UDF_ID_DEVELOPER);
1779 fe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1780 fe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1781 fe->uniqueID = cpu_to_le64(iinfo->i_unique);
1782 fe->lengthExtendedAttr = cpu_to_le32(iinfo->i_lenEAttr);
1783 fe->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc);
1784 fe->checkpoint = cpu_to_le32(iinfo->i_checkpoint);
1785 fe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_FE);
1786 crclen = sizeof(struct fileEntry);
1788 memcpy(bh->b_data + sizeof(struct extendedFileEntry),
1790 inode->i_sb->s_blocksize -
1791 sizeof(struct extendedFileEntry));
1793 cpu_to_le64(inode->i_size + iinfo->i_lenStreams);
1794 efe->logicalBlocksRecorded = cpu_to_le64(lb_recorded);
1796 if (iinfo->i_streamdir) {
1797 struct long_ad *icb_lad = &efe->streamDirectoryICB;
1799 icb_lad->extLocation =
1800 cpu_to_lelb(iinfo->i_locStreamdir);
1801 icb_lad->extLength =
1802 cpu_to_le32(inode->i_sb->s_blocksize);
1805 udf_adjust_time(iinfo, inode->i_atime);
1806 udf_adjust_time(iinfo, inode->i_mtime);
1807 udf_adjust_time(iinfo, inode->i_ctime);
1809 udf_time_to_disk_stamp(&efe->accessTime, inode->i_atime);
1810 udf_time_to_disk_stamp(&efe->modificationTime, inode->i_mtime);
1811 udf_time_to_disk_stamp(&efe->createTime, iinfo->i_crtime);
1812 udf_time_to_disk_stamp(&efe->attrTime, inode->i_ctime);
1814 memset(&(efe->impIdent), 0, sizeof(efe->impIdent));
1815 strcpy(efe->impIdent.ident, UDF_ID_DEVELOPER);
1816 efe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1817 efe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1818 efe->uniqueID = cpu_to_le64(iinfo->i_unique);
1819 efe->lengthExtendedAttr = cpu_to_le32(iinfo->i_lenEAttr);
1820 efe->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc);
1821 efe->checkpoint = cpu_to_le32(iinfo->i_checkpoint);
1822 efe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_EFE);
1823 crclen = sizeof(struct extendedFileEntry);
1827 if (iinfo->i_strat4096) {
1828 fe->icbTag.strategyType = cpu_to_le16(4096);
1829 fe->icbTag.strategyParameter = cpu_to_le16(1);
1830 fe->icbTag.numEntries = cpu_to_le16(2);
1832 fe->icbTag.strategyType = cpu_to_le16(4);
1833 fe->icbTag.numEntries = cpu_to_le16(1);
1837 fe->icbTag.fileType = ICBTAG_FILE_TYPE_USE;
1838 else if (S_ISDIR(inode->i_mode))
1839 fe->icbTag.fileType = ICBTAG_FILE_TYPE_DIRECTORY;
1840 else if (S_ISREG(inode->i_mode))
1841 fe->icbTag.fileType = ICBTAG_FILE_TYPE_REGULAR;
1842 else if (S_ISLNK(inode->i_mode))
1843 fe->icbTag.fileType = ICBTAG_FILE_TYPE_SYMLINK;
1844 else if (S_ISBLK(inode->i_mode))
1845 fe->icbTag.fileType = ICBTAG_FILE_TYPE_BLOCK;
1846 else if (S_ISCHR(inode->i_mode))
1847 fe->icbTag.fileType = ICBTAG_FILE_TYPE_CHAR;
1848 else if (S_ISFIFO(inode->i_mode))
1849 fe->icbTag.fileType = ICBTAG_FILE_TYPE_FIFO;
1850 else if (S_ISSOCK(inode->i_mode))
1851 fe->icbTag.fileType = ICBTAG_FILE_TYPE_SOCKET;
1853 icbflags = iinfo->i_alloc_type |
1854 ((inode->i_mode & S_ISUID) ? ICBTAG_FLAG_SETUID : 0) |
1855 ((inode->i_mode & S_ISGID) ? ICBTAG_FLAG_SETGID : 0) |
1856 ((inode->i_mode & S_ISVTX) ? ICBTAG_FLAG_STICKY : 0) |
1857 (le16_to_cpu(fe->icbTag.flags) &
1858 ~(ICBTAG_FLAG_AD_MASK | ICBTAG_FLAG_SETUID |
1859 ICBTAG_FLAG_SETGID | ICBTAG_FLAG_STICKY));
1861 fe->icbTag.flags = cpu_to_le16(icbflags);
1862 if (sbi->s_udfrev >= 0x0200)
1863 fe->descTag.descVersion = cpu_to_le16(3);
1865 fe->descTag.descVersion = cpu_to_le16(2);
1866 fe->descTag.tagSerialNum = cpu_to_le16(sbi->s_serial_number);
1867 fe->descTag.tagLocation = cpu_to_le32(
1868 iinfo->i_location.logicalBlockNum);
1869 crclen += iinfo->i_lenEAttr + iinfo->i_lenAlloc - sizeof(struct tag);
1870 fe->descTag.descCRCLength = cpu_to_le16(crclen);
1871 fe->descTag.descCRC = cpu_to_le16(crc_itu_t(0, (char *)fe + sizeof(struct tag),
1873 fe->descTag.tagChecksum = udf_tag_checksum(&fe->descTag);
1875 set_buffer_uptodate(bh);
1878 /* write the data blocks */
1879 mark_buffer_dirty(bh);
1881 sync_dirty_buffer(bh);
1882 if (buffer_write_io_error(bh)) {
1883 udf_warn(inode->i_sb, "IO error syncing udf inode [%08lx]\n",
1893 struct inode *__udf_iget(struct super_block *sb, struct kernel_lb_addr *ino,
1896 unsigned long block = udf_get_lb_pblock(sb, ino, 0);
1897 struct inode *inode = iget_locked(sb, block);
1901 return ERR_PTR(-ENOMEM);
1903 if (!(inode->i_state & I_NEW)) {
1904 if (UDF_I(inode)->i_hidden != hidden_inode) {
1906 return ERR_PTR(-EFSCORRUPTED);
1911 memcpy(&UDF_I(inode)->i_location, ino, sizeof(struct kernel_lb_addr));
1912 err = udf_read_inode(inode, hidden_inode);
1915 return ERR_PTR(err);
1917 unlock_new_inode(inode);
1922 int udf_setup_indirect_aext(struct inode *inode, udf_pblk_t block,
1923 struct extent_position *epos)
1925 struct super_block *sb = inode->i_sb;
1926 struct buffer_head *bh;
1927 struct allocExtDesc *aed;
1928 struct extent_position nepos;
1929 struct kernel_lb_addr neloc;
1932 if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
1933 adsize = sizeof(struct short_ad);
1934 else if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_LONG)
1935 adsize = sizeof(struct long_ad);
1939 neloc.logicalBlockNum = block;
1940 neloc.partitionReferenceNum = epos->block.partitionReferenceNum;
1942 bh = udf_tgetblk(sb, udf_get_lb_pblock(sb, &neloc, 0));
1946 memset(bh->b_data, 0x00, sb->s_blocksize);
1947 set_buffer_uptodate(bh);
1949 mark_buffer_dirty_inode(bh, inode);
1951 aed = (struct allocExtDesc *)(bh->b_data);
1952 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_STRICT)) {
1953 aed->previousAllocExtLocation =
1954 cpu_to_le32(epos->block.logicalBlockNum);
1956 aed->lengthAllocDescs = cpu_to_le32(0);
1957 if (UDF_SB(sb)->s_udfrev >= 0x0200)
1961 udf_new_tag(bh->b_data, TAG_IDENT_AED, ver, 1, block,
1962 sizeof(struct tag));
1964 nepos.block = neloc;
1965 nepos.offset = sizeof(struct allocExtDesc);
1969 * Do we have to copy current last extent to make space for indirect
1972 if (epos->offset + adsize > sb->s_blocksize) {
1973 struct kernel_lb_addr cp_loc;
1977 epos->offset -= adsize;
1978 cp_type = udf_current_aext(inode, epos, &cp_loc, &cp_len, 0);
1979 cp_len |= ((uint32_t)cp_type) << 30;
1981 __udf_add_aext(inode, &nepos, &cp_loc, cp_len, 1);
1982 udf_write_aext(inode, epos, &nepos.block,
1983 sb->s_blocksize | EXT_NEXT_EXTENT_ALLOCDESCS, 0);
1985 __udf_add_aext(inode, epos, &nepos.block,
1986 sb->s_blocksize | EXT_NEXT_EXTENT_ALLOCDESCS, 0);
1996 * Append extent at the given position - should be the first free one in inode
1997 * / indirect extent. This function assumes there is enough space in the inode
1998 * or indirect extent. Use udf_add_aext() if you didn't check for this before.
2000 int __udf_add_aext(struct inode *inode, struct extent_position *epos,
2001 struct kernel_lb_addr *eloc, uint32_t elen, int inc)
2003 struct udf_inode_info *iinfo = UDF_I(inode);
2004 struct allocExtDesc *aed;
2007 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
2008 adsize = sizeof(struct short_ad);
2009 else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
2010 adsize = sizeof(struct long_ad);
2015 WARN_ON(iinfo->i_lenAlloc !=
2016 epos->offset - udf_file_entry_alloc_offset(inode));
2018 aed = (struct allocExtDesc *)epos->bh->b_data;
2019 WARN_ON(le32_to_cpu(aed->lengthAllocDescs) !=
2020 epos->offset - sizeof(struct allocExtDesc));
2021 WARN_ON(epos->offset + adsize > inode->i_sb->s_blocksize);
2024 udf_write_aext(inode, epos, eloc, elen, inc);
2027 iinfo->i_lenAlloc += adsize;
2028 mark_inode_dirty(inode);
2030 aed = (struct allocExtDesc *)epos->bh->b_data;
2031 le32_add_cpu(&aed->lengthAllocDescs, adsize);
2032 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
2033 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201)
2034 udf_update_tag(epos->bh->b_data,
2035 epos->offset + (inc ? 0 : adsize));
2037 udf_update_tag(epos->bh->b_data,
2038 sizeof(struct allocExtDesc));
2039 mark_buffer_dirty_inode(epos->bh, inode);
2046 * Append extent at given position - should be the first free one in inode
2047 * / indirect extent. Takes care of allocating and linking indirect blocks.
2049 int udf_add_aext(struct inode *inode, struct extent_position *epos,
2050 struct kernel_lb_addr *eloc, uint32_t elen, int inc)
2053 struct super_block *sb = inode->i_sb;
2055 if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
2056 adsize = sizeof(struct short_ad);
2057 else if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_LONG)
2058 adsize = sizeof(struct long_ad);
2062 if (epos->offset + (2 * adsize) > sb->s_blocksize) {
2064 udf_pblk_t new_block;
2066 new_block = udf_new_block(sb, NULL,
2067 epos->block.partitionReferenceNum,
2068 epos->block.logicalBlockNum, &err);
2072 err = udf_setup_indirect_aext(inode, new_block, epos);
2077 return __udf_add_aext(inode, epos, eloc, elen, inc);
2080 void udf_write_aext(struct inode *inode, struct extent_position *epos,
2081 struct kernel_lb_addr *eloc, uint32_t elen, int inc)
2085 struct short_ad *sad;
2086 struct long_ad *lad;
2087 struct udf_inode_info *iinfo = UDF_I(inode);
2090 ptr = iinfo->i_data + epos->offset -
2091 udf_file_entry_alloc_offset(inode) +
2094 ptr = epos->bh->b_data + epos->offset;
2096 switch (iinfo->i_alloc_type) {
2097 case ICBTAG_FLAG_AD_SHORT:
2098 sad = (struct short_ad *)ptr;
2099 sad->extLength = cpu_to_le32(elen);
2100 sad->extPosition = cpu_to_le32(eloc->logicalBlockNum);
2101 adsize = sizeof(struct short_ad);
2103 case ICBTAG_FLAG_AD_LONG:
2104 lad = (struct long_ad *)ptr;
2105 lad->extLength = cpu_to_le32(elen);
2106 lad->extLocation = cpu_to_lelb(*eloc);
2107 memset(lad->impUse, 0x00, sizeof(lad->impUse));
2108 adsize = sizeof(struct long_ad);
2115 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
2116 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) {
2117 struct allocExtDesc *aed =
2118 (struct allocExtDesc *)epos->bh->b_data;
2119 udf_update_tag(epos->bh->b_data,
2120 le32_to_cpu(aed->lengthAllocDescs) +
2121 sizeof(struct allocExtDesc));
2123 mark_buffer_dirty_inode(epos->bh, inode);
2125 mark_inode_dirty(inode);
2129 epos->offset += adsize;
2133 * Only 1 indirect extent in a row really makes sense but allow upto 16 in case
2134 * someone does some weird stuff.
2136 #define UDF_MAX_INDIR_EXTS 16
2138 int8_t udf_next_aext(struct inode *inode, struct extent_position *epos,
2139 struct kernel_lb_addr *eloc, uint32_t *elen, int inc)
2142 unsigned int indirections = 0;
2144 while ((etype = udf_current_aext(inode, epos, eloc, elen, inc)) ==
2145 (EXT_NEXT_EXTENT_ALLOCDESCS >> 30)) {
2148 if (++indirections > UDF_MAX_INDIR_EXTS) {
2149 udf_err(inode->i_sb,
2150 "too many indirect extents in inode %lu\n",
2155 epos->block = *eloc;
2156 epos->offset = sizeof(struct allocExtDesc);
2158 block = udf_get_lb_pblock(inode->i_sb, &epos->block, 0);
2159 epos->bh = udf_tread(inode->i_sb, block);
2161 udf_debug("reading block %u failed!\n", block);
2169 int8_t udf_current_aext(struct inode *inode, struct extent_position *epos,
2170 struct kernel_lb_addr *eloc, uint32_t *elen, int inc)
2175 struct short_ad *sad;
2176 struct long_ad *lad;
2177 struct udf_inode_info *iinfo = UDF_I(inode);
2181 epos->offset = udf_file_entry_alloc_offset(inode);
2182 ptr = iinfo->i_data + epos->offset -
2183 udf_file_entry_alloc_offset(inode) +
2185 alen = udf_file_entry_alloc_offset(inode) +
2189 epos->offset = sizeof(struct allocExtDesc);
2190 ptr = epos->bh->b_data + epos->offset;
2191 alen = sizeof(struct allocExtDesc) +
2192 le32_to_cpu(((struct allocExtDesc *)epos->bh->b_data)->
2196 switch (iinfo->i_alloc_type) {
2197 case ICBTAG_FLAG_AD_SHORT:
2198 sad = udf_get_fileshortad(ptr, alen, &epos->offset, inc);
2201 etype = le32_to_cpu(sad->extLength) >> 30;
2202 eloc->logicalBlockNum = le32_to_cpu(sad->extPosition);
2203 eloc->partitionReferenceNum =
2204 iinfo->i_location.partitionReferenceNum;
2205 *elen = le32_to_cpu(sad->extLength) & UDF_EXTENT_LENGTH_MASK;
2207 case ICBTAG_FLAG_AD_LONG:
2208 lad = udf_get_filelongad(ptr, alen, &epos->offset, inc);
2211 etype = le32_to_cpu(lad->extLength) >> 30;
2212 *eloc = lelb_to_cpu(lad->extLocation);
2213 *elen = le32_to_cpu(lad->extLength) & UDF_EXTENT_LENGTH_MASK;
2216 udf_debug("alloc_type = %u unsupported\n", iinfo->i_alloc_type);
2223 static int udf_insert_aext(struct inode *inode, struct extent_position epos,
2224 struct kernel_lb_addr neloc, uint32_t nelen)
2226 struct kernel_lb_addr oeloc;
2234 while ((etype = udf_next_aext(inode, &epos, &oeloc, &oelen, 0)) != -1) {
2235 udf_write_aext(inode, &epos, &neloc, nelen, 1);
2237 nelen = (etype << 30) | oelen;
2239 err = udf_add_aext(inode, &epos, &neloc, nelen, 1);
2245 int8_t udf_delete_aext(struct inode *inode, struct extent_position epos)
2247 struct extent_position oepos;
2250 struct allocExtDesc *aed;
2251 struct udf_inode_info *iinfo;
2252 struct kernel_lb_addr eloc;
2260 iinfo = UDF_I(inode);
2261 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
2262 adsize = sizeof(struct short_ad);
2263 else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
2264 adsize = sizeof(struct long_ad);
2269 if (udf_next_aext(inode, &epos, &eloc, &elen, 1) == -1)
2272 while ((etype = udf_next_aext(inode, &epos, &eloc, &elen, 1)) != -1) {
2273 udf_write_aext(inode, &oepos, &eloc, (etype << 30) | elen, 1);
2274 if (oepos.bh != epos.bh) {
2275 oepos.block = epos.block;
2279 oepos.offset = epos.offset - adsize;
2282 memset(&eloc, 0x00, sizeof(struct kernel_lb_addr));
2285 if (epos.bh != oepos.bh) {
2286 udf_free_blocks(inode->i_sb, inode, &epos.block, 0, 1);
2287 udf_write_aext(inode, &oepos, &eloc, elen, 1);
2288 udf_write_aext(inode, &oepos, &eloc, elen, 1);
2290 iinfo->i_lenAlloc -= (adsize * 2);
2291 mark_inode_dirty(inode);
2293 aed = (struct allocExtDesc *)oepos.bh->b_data;
2294 le32_add_cpu(&aed->lengthAllocDescs, -(2 * adsize));
2295 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
2296 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201)
2297 udf_update_tag(oepos.bh->b_data,
2298 oepos.offset - (2 * adsize));
2300 udf_update_tag(oepos.bh->b_data,
2301 sizeof(struct allocExtDesc));
2302 mark_buffer_dirty_inode(oepos.bh, inode);
2305 udf_write_aext(inode, &oepos, &eloc, elen, 1);
2307 iinfo->i_lenAlloc -= adsize;
2308 mark_inode_dirty(inode);
2310 aed = (struct allocExtDesc *)oepos.bh->b_data;
2311 le32_add_cpu(&aed->lengthAllocDescs, -adsize);
2312 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
2313 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201)
2314 udf_update_tag(oepos.bh->b_data,
2315 epos.offset - adsize);
2317 udf_update_tag(oepos.bh->b_data,
2318 sizeof(struct allocExtDesc));
2319 mark_buffer_dirty_inode(oepos.bh, inode);
2326 return (elen >> 30);
2329 int8_t inode_bmap(struct inode *inode, sector_t block,
2330 struct extent_position *pos, struct kernel_lb_addr *eloc,
2331 uint32_t *elen, sector_t *offset)
2333 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits;
2334 loff_t lbcount = 0, bcount = (loff_t) block << blocksize_bits;
2336 struct udf_inode_info *iinfo;
2338 iinfo = UDF_I(inode);
2339 if (!udf_read_extent_cache(inode, bcount, &lbcount, pos)) {
2341 pos->block = iinfo->i_location;
2346 etype = udf_next_aext(inode, pos, eloc, elen, 1);
2348 *offset = (bcount - lbcount) >> blocksize_bits;
2349 iinfo->i_lenExtents = lbcount;
2353 } while (lbcount <= bcount);
2354 /* update extent cache */
2355 udf_update_extent_cache(inode, lbcount - *elen, pos);
2356 *offset = (bcount + *elen - lbcount) >> blocksize_bits;
2361 udf_pblk_t udf_block_map(struct inode *inode, sector_t block)
2363 struct kernel_lb_addr eloc;
2366 struct extent_position epos = {};
2369 down_read(&UDF_I(inode)->i_data_sem);
2371 if (inode_bmap(inode, block, &epos, &eloc, &elen, &offset) ==
2372 (EXT_RECORDED_ALLOCATED >> 30))
2373 ret = udf_get_lb_pblock(inode->i_sb, &eloc, offset);
2377 up_read(&UDF_I(inode)->i_data_sem);
2380 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_VARCONV))
2381 return udf_fixed_to_variable(ret);