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 int8_t 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 void 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_readpage(struct file *file, struct page *page)
198 return mpage_readpage(page, 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, unsigned flags,
208 struct page **pagep, void **fsdata)
212 ret = block_write_begin(mapping, pos, len, flags, 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 .set_page_dirty = __set_page_dirty_buffers,
239 .readpage = udf_readpage,
240 .readahead = udf_readahead,
241 .writepage = udf_writepage,
242 .writepages = udf_writepages,
243 .write_begin = udf_write_begin,
244 .write_end = generic_write_end,
245 .direct_IO = udf_direct_IO,
250 * Expand file stored in ICB to a normal one-block-file
252 * This function requires i_data_sem for writing and releases it.
253 * This function requires i_mutex held
255 int udf_expand_file_adinicb(struct inode *inode)
259 struct udf_inode_info *iinfo = UDF_I(inode);
261 struct writeback_control udf_wbc = {
262 .sync_mode = WB_SYNC_NONE,
266 WARN_ON_ONCE(!inode_is_locked(inode));
267 if (!iinfo->i_lenAlloc) {
268 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))
269 iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT;
271 iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG;
272 /* from now on we have normal address_space methods */
273 inode->i_data.a_ops = &udf_aops;
274 up_write(&iinfo->i_data_sem);
275 mark_inode_dirty(inode);
279 * Release i_data_sem so that we can lock a page - page lock ranks
280 * above i_data_sem. i_mutex still protects us against file changes.
282 up_write(&iinfo->i_data_sem);
284 page = find_or_create_page(inode->i_mapping, 0, GFP_NOFS);
288 if (!PageUptodate(page)) {
289 kaddr = kmap_atomic(page);
290 memset(kaddr + iinfo->i_lenAlloc, 0x00,
291 PAGE_SIZE - iinfo->i_lenAlloc);
292 memcpy(kaddr, iinfo->i_data + iinfo->i_lenEAttr,
294 flush_dcache_page(page);
295 SetPageUptodate(page);
296 kunmap_atomic(kaddr);
298 down_write(&iinfo->i_data_sem);
299 memset(iinfo->i_data + iinfo->i_lenEAttr, 0x00,
301 iinfo->i_lenAlloc = 0;
302 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))
303 iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT;
305 iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG;
306 /* from now on we have normal address_space methods */
307 inode->i_data.a_ops = &udf_aops;
308 up_write(&iinfo->i_data_sem);
309 err = inode->i_data.a_ops->writepage(page, &udf_wbc);
311 /* Restore everything back so that we don't lose data... */
313 down_write(&iinfo->i_data_sem);
314 kaddr = kmap_atomic(page);
315 memcpy(iinfo->i_data + iinfo->i_lenEAttr, kaddr, inode->i_size);
316 kunmap_atomic(kaddr);
318 iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB;
319 inode->i_data.a_ops = &udf_adinicb_aops;
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,
394 le16_to_cpu(sfi->lengthOfImpUse))) {
395 iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB;
400 mark_buffer_dirty_inode(dbh, inode);
402 memset(iinfo->i_data + iinfo->i_lenEAttr, 0, iinfo->i_lenAlloc);
403 iinfo->i_lenAlloc = 0;
404 eloc.logicalBlockNum = *block;
405 eloc.partitionReferenceNum =
406 iinfo->i_location.partitionReferenceNum;
407 iinfo->i_lenExtents = inode->i_size;
409 epos.block = iinfo->i_location;
410 epos.offset = udf_file_entry_alloc_offset(inode);
411 udf_add_aext(inode, &epos, &eloc, inode->i_size, 0);
415 mark_inode_dirty(inode);
419 static int udf_get_block(struct inode *inode, sector_t block,
420 struct buffer_head *bh_result, int create)
424 struct udf_inode_info *iinfo;
427 phys = udf_block_map(inode, block);
429 map_bh(bh_result, inode->i_sb, phys);
435 iinfo = UDF_I(inode);
437 down_write(&iinfo->i_data_sem);
438 if (block == iinfo->i_next_alloc_block + 1) {
439 iinfo->i_next_alloc_block++;
440 iinfo->i_next_alloc_goal++;
443 udf_clear_extent_cache(inode);
444 phys = inode_getblk(inode, block, &err, &new);
449 set_buffer_new(bh_result);
450 map_bh(bh_result, inode->i_sb, phys);
453 up_write(&iinfo->i_data_sem);
457 static struct buffer_head *udf_getblk(struct inode *inode, udf_pblk_t block,
458 int create, int *err)
460 struct buffer_head *bh;
461 struct buffer_head dummy;
464 dummy.b_blocknr = -1000;
465 *err = udf_get_block(inode, block, &dummy, create);
466 if (!*err && buffer_mapped(&dummy)) {
467 bh = sb_getblk(inode->i_sb, dummy.b_blocknr);
468 if (buffer_new(&dummy)) {
470 memset(bh->b_data, 0x00, inode->i_sb->s_blocksize);
471 set_buffer_uptodate(bh);
473 mark_buffer_dirty_inode(bh, inode);
481 /* Extend the file with new blocks totaling 'new_block_bytes',
482 * return the number of extents added
484 static int udf_do_extend_file(struct inode *inode,
485 struct extent_position *last_pos,
486 struct kernel_long_ad *last_ext,
487 loff_t new_block_bytes)
490 int count = 0, fake = !(last_ext->extLength & UDF_EXTENT_LENGTH_MASK);
491 struct super_block *sb = inode->i_sb;
492 struct kernel_lb_addr prealloc_loc = {};
493 uint32_t prealloc_len = 0;
494 struct udf_inode_info *iinfo;
497 /* The previous extent is fake and we should not extend by anything
498 * - there's nothing to do... */
499 if (!new_block_bytes && fake)
502 iinfo = UDF_I(inode);
503 /* Round the last extent up to a multiple of block size */
504 if (last_ext->extLength & (sb->s_blocksize - 1)) {
505 last_ext->extLength =
506 (last_ext->extLength & UDF_EXTENT_FLAG_MASK) |
507 (((last_ext->extLength & UDF_EXTENT_LENGTH_MASK) +
508 sb->s_blocksize - 1) & ~(sb->s_blocksize - 1));
509 iinfo->i_lenExtents =
510 (iinfo->i_lenExtents + sb->s_blocksize - 1) &
511 ~(sb->s_blocksize - 1);
514 /* Last extent are just preallocated blocks? */
515 if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) ==
516 EXT_NOT_RECORDED_ALLOCATED) {
517 /* Save the extent so that we can reattach it to the end */
518 prealloc_loc = last_ext->extLocation;
519 prealloc_len = last_ext->extLength;
520 /* Mark the extent as a hole */
521 last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED |
522 (last_ext->extLength & UDF_EXTENT_LENGTH_MASK);
523 last_ext->extLocation.logicalBlockNum = 0;
524 last_ext->extLocation.partitionReferenceNum = 0;
527 /* Can we merge with the previous extent? */
528 if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) ==
529 EXT_NOT_RECORDED_NOT_ALLOCATED) {
530 add = (1 << 30) - sb->s_blocksize -
531 (last_ext->extLength & UDF_EXTENT_LENGTH_MASK);
532 if (add > new_block_bytes)
533 add = new_block_bytes;
534 new_block_bytes -= add;
535 last_ext->extLength += add;
539 udf_add_aext(inode, last_pos, &last_ext->extLocation,
540 last_ext->extLength, 1);
543 struct kernel_lb_addr tmploc;
546 udf_write_aext(inode, last_pos, &last_ext->extLocation,
547 last_ext->extLength, 1);
550 * We've rewritten the last extent. If we are going to add
551 * more extents, we may need to enter possible following
552 * empty indirect extent.
554 if (new_block_bytes || prealloc_len)
555 udf_next_aext(inode, last_pos, &tmploc, &tmplen, 0);
558 /* Managed to do everything necessary? */
559 if (!new_block_bytes)
562 /* All further extents will be NOT_RECORDED_NOT_ALLOCATED */
563 last_ext->extLocation.logicalBlockNum = 0;
564 last_ext->extLocation.partitionReferenceNum = 0;
565 add = (1 << 30) - sb->s_blocksize;
566 last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | add;
568 /* Create enough extents to cover the whole hole */
569 while (new_block_bytes > add) {
570 new_block_bytes -= add;
571 err = udf_add_aext(inode, last_pos, &last_ext->extLocation,
572 last_ext->extLength, 1);
577 if (new_block_bytes) {
578 last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED |
580 err = udf_add_aext(inode, last_pos, &last_ext->extLocation,
581 last_ext->extLength, 1);
588 /* Do we have some preallocated blocks saved? */
590 err = udf_add_aext(inode, last_pos, &prealloc_loc,
594 last_ext->extLocation = prealloc_loc;
595 last_ext->extLength = prealloc_len;
599 /* last_pos should point to the last written extent... */
600 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
601 last_pos->offset -= sizeof(struct short_ad);
602 else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
603 last_pos->offset -= sizeof(struct long_ad);
610 /* Extend the final block of the file to final_block_len bytes */
611 static void udf_do_extend_final_block(struct inode *inode,
612 struct extent_position *last_pos,
613 struct kernel_long_ad *last_ext,
614 uint32_t final_block_len)
616 struct super_block *sb = inode->i_sb;
617 uint32_t added_bytes;
619 added_bytes = final_block_len -
620 (last_ext->extLength & (sb->s_blocksize - 1));
621 last_ext->extLength += added_bytes;
622 UDF_I(inode)->i_lenExtents += added_bytes;
624 udf_write_aext(inode, last_pos, &last_ext->extLocation,
625 last_ext->extLength, 1);
628 static int udf_extend_file(struct inode *inode, loff_t newsize)
631 struct extent_position epos;
632 struct kernel_lb_addr eloc;
635 struct super_block *sb = inode->i_sb;
636 sector_t first_block = newsize >> sb->s_blocksize_bits, offset;
637 unsigned long partial_final_block;
639 struct udf_inode_info *iinfo = UDF_I(inode);
640 struct kernel_long_ad extent;
642 int within_final_block;
644 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
645 adsize = sizeof(struct short_ad);
646 else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
647 adsize = sizeof(struct long_ad);
651 etype = inode_bmap(inode, first_block, &epos, &eloc, &elen, &offset);
652 within_final_block = (etype != -1);
654 if ((!epos.bh && epos.offset == udf_file_entry_alloc_offset(inode)) ||
655 (epos.bh && epos.offset == sizeof(struct allocExtDesc))) {
656 /* File has no extents at all or has empty last
657 * indirect extent! Create a fake extent... */
658 extent.extLocation.logicalBlockNum = 0;
659 extent.extLocation.partitionReferenceNum = 0;
660 extent.extLength = EXT_NOT_RECORDED_NOT_ALLOCATED;
662 epos.offset -= adsize;
663 etype = udf_next_aext(inode, &epos, &extent.extLocation,
664 &extent.extLength, 0);
665 extent.extLength |= etype << 30;
668 partial_final_block = newsize & (sb->s_blocksize - 1);
670 /* File has extent covering the new size (could happen when extending
673 if (within_final_block) {
674 /* Extending file within the last file block */
675 udf_do_extend_final_block(inode, &epos, &extent,
676 partial_final_block);
678 loff_t add = ((loff_t)offset << sb->s_blocksize_bits) |
680 err = udf_do_extend_file(inode, &epos, &extent, add);
686 iinfo->i_lenExtents = newsize;
692 static sector_t inode_getblk(struct inode *inode, sector_t block,
695 struct kernel_long_ad laarr[EXTENT_MERGE_SIZE];
696 struct extent_position prev_epos, cur_epos, next_epos;
697 int count = 0, startnum = 0, endnum = 0;
698 uint32_t elen = 0, tmpelen;
699 struct kernel_lb_addr eloc, tmpeloc;
701 loff_t lbcount = 0, b_off = 0;
702 udf_pblk_t newblocknum, newblock;
705 struct udf_inode_info *iinfo = UDF_I(inode);
706 udf_pblk_t goal = 0, pgoal = iinfo->i_location.logicalBlockNum;
712 prev_epos.offset = udf_file_entry_alloc_offset(inode);
713 prev_epos.block = iinfo->i_location;
715 cur_epos = next_epos = prev_epos;
716 b_off = (loff_t)block << inode->i_sb->s_blocksize_bits;
718 /* find the extent which contains the block we are looking for.
719 alternate between laarr[0] and laarr[1] for locations of the
720 current extent, and the previous extent */
722 if (prev_epos.bh != cur_epos.bh) {
723 brelse(prev_epos.bh);
725 prev_epos.bh = cur_epos.bh;
727 if (cur_epos.bh != next_epos.bh) {
729 get_bh(next_epos.bh);
730 cur_epos.bh = next_epos.bh;
735 prev_epos.block = cur_epos.block;
736 cur_epos.block = next_epos.block;
738 prev_epos.offset = cur_epos.offset;
739 cur_epos.offset = next_epos.offset;
741 etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 1);
747 laarr[c].extLength = (etype << 30) | elen;
748 laarr[c].extLocation = eloc;
750 if (etype != (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))
751 pgoal = eloc.logicalBlockNum +
752 ((elen + inode->i_sb->s_blocksize - 1) >>
753 inode->i_sb->s_blocksize_bits);
756 } while (lbcount + elen <= b_off);
759 offset = b_off >> inode->i_sb->s_blocksize_bits;
761 * Move prev_epos and cur_epos into indirect extent if we are at
764 udf_next_aext(inode, &prev_epos, &tmpeloc, &tmpelen, 0);
765 udf_next_aext(inode, &cur_epos, &tmpeloc, &tmpelen, 0);
767 /* if the extent is allocated and recorded, return the block
768 if the extent is not a multiple of the blocksize, round up */
770 if (etype == (EXT_RECORDED_ALLOCATED >> 30)) {
771 if (elen & (inode->i_sb->s_blocksize - 1)) {
772 elen = EXT_RECORDED_ALLOCATED |
773 ((elen + inode->i_sb->s_blocksize - 1) &
774 ~(inode->i_sb->s_blocksize - 1));
775 udf_write_aext(inode, &cur_epos, &eloc, elen, 1);
777 newblock = udf_get_lb_pblock(inode->i_sb, &eloc, offset);
781 /* Are we beyond EOF? */
791 /* Create a fake extent when there's not one */
792 memset(&laarr[0].extLocation, 0x00,
793 sizeof(struct kernel_lb_addr));
794 laarr[0].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED;
795 /* Will udf_do_extend_file() create real extent from
797 startnum = (offset > 0);
799 /* Create extents for the hole between EOF and offset */
800 hole_len = (loff_t)offset << inode->i_blkbits;
801 ret = udf_do_extend_file(inode, &prev_epos, laarr, hole_len);
810 /* We are not covered by a preallocated extent? */
811 if ((laarr[0].extLength & UDF_EXTENT_FLAG_MASK) !=
812 EXT_NOT_RECORDED_ALLOCATED) {
813 /* Is there any real extent? - otherwise we overwrite
817 laarr[c].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED |
818 inode->i_sb->s_blocksize;
819 memset(&laarr[c].extLocation, 0x00,
820 sizeof(struct kernel_lb_addr));
827 endnum = startnum = ((count > 2) ? 2 : count);
829 /* if the current extent is in position 0,
830 swap it with the previous */
831 if (!c && count != 1) {
838 /* if the current block is located in an extent,
839 read the next extent */
840 etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 0);
842 laarr[c + 1].extLength = (etype << 30) | elen;
843 laarr[c + 1].extLocation = eloc;
851 /* if the current extent is not recorded but allocated, get the
852 * block in the extent corresponding to the requested block */
853 if ((laarr[c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30))
854 newblocknum = laarr[c].extLocation.logicalBlockNum + offset;
855 else { /* otherwise, allocate a new block */
856 if (iinfo->i_next_alloc_block == block)
857 goal = iinfo->i_next_alloc_goal;
860 if (!(goal = pgoal)) /* XXX: what was intended here? */
861 goal = iinfo->i_location.logicalBlockNum + 1;
864 newblocknum = udf_new_block(inode->i_sb, inode,
865 iinfo->i_location.partitionReferenceNum,
873 iinfo->i_lenExtents += inode->i_sb->s_blocksize;
876 /* if the extent the requsted block is located in contains multiple
877 * blocks, split the extent into at most three extents. blocks prior
878 * to requested block, requested block, and blocks after requested
880 udf_split_extents(inode, &c, offset, newblocknum, laarr, &endnum);
882 /* We preallocate blocks only for regular files. It also makes sense
883 * for directories but there's a problem when to drop the
884 * preallocation. We might use some delayed work for that but I feel
885 * it's overengineering for a filesystem like UDF. */
886 if (S_ISREG(inode->i_mode))
887 udf_prealloc_extents(inode, c, lastblock, laarr, &endnum);
889 /* merge any continuous blocks in laarr */
890 udf_merge_extents(inode, laarr, &endnum);
892 /* write back the new extents, inserting new extents if the new number
893 * of extents is greater than the old number, and deleting extents if
894 * the new number of extents is less than the old number */
895 udf_update_extents(inode, laarr, startnum, endnum, &prev_epos);
897 newblock = udf_get_pblock(inode->i_sb, newblocknum,
898 iinfo->i_location.partitionReferenceNum, 0);
904 iinfo->i_next_alloc_block = block;
905 iinfo->i_next_alloc_goal = newblocknum;
906 inode->i_ctime = current_time(inode);
909 udf_sync_inode(inode);
911 mark_inode_dirty(inode);
913 brelse(prev_epos.bh);
915 brelse(next_epos.bh);
919 static void udf_split_extents(struct inode *inode, int *c, int offset,
920 udf_pblk_t newblocknum,
921 struct kernel_long_ad *laarr, int *endnum)
923 unsigned long blocksize = inode->i_sb->s_blocksize;
924 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits;
926 if ((laarr[*c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30) ||
927 (laarr[*c].extLength >> 30) ==
928 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) {
930 int blen = ((laarr[curr].extLength & UDF_EXTENT_LENGTH_MASK) +
931 blocksize - 1) >> blocksize_bits;
932 int8_t etype = (laarr[curr].extLength >> 30);
936 else if (!offset || blen == offset + 1) {
937 laarr[curr + 2] = laarr[curr + 1];
938 laarr[curr + 1] = laarr[curr];
940 laarr[curr + 3] = laarr[curr + 1];
941 laarr[curr + 2] = laarr[curr + 1] = laarr[curr];
945 if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30)) {
946 udf_free_blocks(inode->i_sb, inode,
947 &laarr[curr].extLocation,
949 laarr[curr].extLength =
950 EXT_NOT_RECORDED_NOT_ALLOCATED |
951 (offset << blocksize_bits);
952 laarr[curr].extLocation.logicalBlockNum = 0;
953 laarr[curr].extLocation.
954 partitionReferenceNum = 0;
956 laarr[curr].extLength = (etype << 30) |
957 (offset << blocksize_bits);
963 laarr[curr].extLocation.logicalBlockNum = newblocknum;
964 if (etype == (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))
965 laarr[curr].extLocation.partitionReferenceNum =
966 UDF_I(inode)->i_location.partitionReferenceNum;
967 laarr[curr].extLength = EXT_RECORDED_ALLOCATED |
971 if (blen != offset + 1) {
972 if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30))
973 laarr[curr].extLocation.logicalBlockNum +=
975 laarr[curr].extLength = (etype << 30) |
976 ((blen - (offset + 1)) << blocksize_bits);
983 static void udf_prealloc_extents(struct inode *inode, int c, int lastblock,
984 struct kernel_long_ad *laarr,
987 int start, length = 0, currlength = 0, i;
989 if (*endnum >= (c + 1)) {
995 if ((laarr[c + 1].extLength >> 30) ==
996 (EXT_NOT_RECORDED_ALLOCATED >> 30)) {
998 length = currlength =
999 (((laarr[c + 1].extLength &
1000 UDF_EXTENT_LENGTH_MASK) +
1001 inode->i_sb->s_blocksize - 1) >>
1002 inode->i_sb->s_blocksize_bits);
1007 for (i = start + 1; i <= *endnum; i++) {
1010 length += UDF_DEFAULT_PREALLOC_BLOCKS;
1011 } else if ((laarr[i].extLength >> 30) ==
1012 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) {
1013 length += (((laarr[i].extLength &
1014 UDF_EXTENT_LENGTH_MASK) +
1015 inode->i_sb->s_blocksize - 1) >>
1016 inode->i_sb->s_blocksize_bits);
1022 int next = laarr[start].extLocation.logicalBlockNum +
1023 (((laarr[start].extLength & UDF_EXTENT_LENGTH_MASK) +
1024 inode->i_sb->s_blocksize - 1) >>
1025 inode->i_sb->s_blocksize_bits);
1026 int numalloc = udf_prealloc_blocks(inode->i_sb, inode,
1027 laarr[start].extLocation.partitionReferenceNum,
1028 next, (UDF_DEFAULT_PREALLOC_BLOCKS > length ?
1029 length : UDF_DEFAULT_PREALLOC_BLOCKS) -
1032 if (start == (c + 1))
1033 laarr[start].extLength +=
1035 inode->i_sb->s_blocksize_bits);
1037 memmove(&laarr[c + 2], &laarr[c + 1],
1038 sizeof(struct long_ad) * (*endnum - (c + 1)));
1040 laarr[c + 1].extLocation.logicalBlockNum = next;
1041 laarr[c + 1].extLocation.partitionReferenceNum =
1042 laarr[c].extLocation.
1043 partitionReferenceNum;
1044 laarr[c + 1].extLength =
1045 EXT_NOT_RECORDED_ALLOCATED |
1047 inode->i_sb->s_blocksize_bits);
1051 for (i = start + 1; numalloc && i < *endnum; i++) {
1052 int elen = ((laarr[i].extLength &
1053 UDF_EXTENT_LENGTH_MASK) +
1054 inode->i_sb->s_blocksize - 1) >>
1055 inode->i_sb->s_blocksize_bits;
1057 if (elen > numalloc) {
1058 laarr[i].extLength -=
1060 inode->i_sb->s_blocksize_bits);
1064 if (*endnum > (i + 1))
1067 sizeof(struct long_ad) *
1068 (*endnum - (i + 1)));
1073 UDF_I(inode)->i_lenExtents +=
1074 numalloc << inode->i_sb->s_blocksize_bits;
1079 static void udf_merge_extents(struct inode *inode, struct kernel_long_ad *laarr,
1083 unsigned long blocksize = inode->i_sb->s_blocksize;
1084 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits;
1086 for (i = 0; i < (*endnum - 1); i++) {
1087 struct kernel_long_ad *li /*l[i]*/ = &laarr[i];
1088 struct kernel_long_ad *lip1 /*l[i plus 1]*/ = &laarr[i + 1];
1090 if (((li->extLength >> 30) == (lip1->extLength >> 30)) &&
1091 (((li->extLength >> 30) ==
1092 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) ||
1093 ((lip1->extLocation.logicalBlockNum -
1094 li->extLocation.logicalBlockNum) ==
1095 (((li->extLength & UDF_EXTENT_LENGTH_MASK) +
1096 blocksize - 1) >> blocksize_bits)))) {
1098 if (((li->extLength & UDF_EXTENT_LENGTH_MASK) +
1099 (lip1->extLength & UDF_EXTENT_LENGTH_MASK) +
1100 blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) {
1101 lip1->extLength = (lip1->extLength -
1103 UDF_EXTENT_LENGTH_MASK) +
1104 UDF_EXTENT_LENGTH_MASK) &
1106 li->extLength = (li->extLength &
1107 UDF_EXTENT_FLAG_MASK) +
1108 (UDF_EXTENT_LENGTH_MASK + 1) -
1110 lip1->extLocation.logicalBlockNum =
1111 li->extLocation.logicalBlockNum +
1113 UDF_EXTENT_LENGTH_MASK) >>
1116 li->extLength = lip1->extLength +
1118 UDF_EXTENT_LENGTH_MASK) +
1119 blocksize - 1) & ~(blocksize - 1));
1120 if (*endnum > (i + 2))
1121 memmove(&laarr[i + 1], &laarr[i + 2],
1122 sizeof(struct long_ad) *
1123 (*endnum - (i + 2)));
1127 } else if (((li->extLength >> 30) ==
1128 (EXT_NOT_RECORDED_ALLOCATED >> 30)) &&
1129 ((lip1->extLength >> 30) ==
1130 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))) {
1131 udf_free_blocks(inode->i_sb, inode, &li->extLocation, 0,
1133 UDF_EXTENT_LENGTH_MASK) +
1134 blocksize - 1) >> blocksize_bits);
1135 li->extLocation.logicalBlockNum = 0;
1136 li->extLocation.partitionReferenceNum = 0;
1138 if (((li->extLength & UDF_EXTENT_LENGTH_MASK) +
1139 (lip1->extLength & UDF_EXTENT_LENGTH_MASK) +
1140 blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) {
1141 lip1->extLength = (lip1->extLength -
1143 UDF_EXTENT_LENGTH_MASK) +
1144 UDF_EXTENT_LENGTH_MASK) &
1146 li->extLength = (li->extLength &
1147 UDF_EXTENT_FLAG_MASK) +
1148 (UDF_EXTENT_LENGTH_MASK + 1) -
1151 li->extLength = lip1->extLength +
1153 UDF_EXTENT_LENGTH_MASK) +
1154 blocksize - 1) & ~(blocksize - 1));
1155 if (*endnum > (i + 2))
1156 memmove(&laarr[i + 1], &laarr[i + 2],
1157 sizeof(struct long_ad) *
1158 (*endnum - (i + 2)));
1162 } else if ((li->extLength >> 30) ==
1163 (EXT_NOT_RECORDED_ALLOCATED >> 30)) {
1164 udf_free_blocks(inode->i_sb, inode,
1165 &li->extLocation, 0,
1167 UDF_EXTENT_LENGTH_MASK) +
1168 blocksize - 1) >> blocksize_bits);
1169 li->extLocation.logicalBlockNum = 0;
1170 li->extLocation.partitionReferenceNum = 0;
1171 li->extLength = (li->extLength &
1172 UDF_EXTENT_LENGTH_MASK) |
1173 EXT_NOT_RECORDED_NOT_ALLOCATED;
1178 static void udf_update_extents(struct inode *inode, struct kernel_long_ad *laarr,
1179 int startnum, int endnum,
1180 struct extent_position *epos)
1183 struct kernel_lb_addr tmploc;
1186 if (startnum > endnum) {
1187 for (i = 0; i < (startnum - endnum); i++)
1188 udf_delete_aext(inode, *epos);
1189 } else if (startnum < endnum) {
1190 for (i = 0; i < (endnum - startnum); i++) {
1191 udf_insert_aext(inode, *epos, laarr[i].extLocation,
1192 laarr[i].extLength);
1193 udf_next_aext(inode, epos, &laarr[i].extLocation,
1194 &laarr[i].extLength, 1);
1199 for (i = start; i < endnum; i++) {
1200 udf_next_aext(inode, epos, &tmploc, &tmplen, 0);
1201 udf_write_aext(inode, epos, &laarr[i].extLocation,
1202 laarr[i].extLength, 1);
1206 struct buffer_head *udf_bread(struct inode *inode, udf_pblk_t block,
1207 int create, int *err)
1209 struct buffer_head *bh = NULL;
1211 bh = udf_getblk(inode, block, create, err);
1215 if (buffer_uptodate(bh))
1218 ll_rw_block(REQ_OP_READ, 0, 1, &bh);
1221 if (buffer_uptodate(bh))
1229 int udf_setsize(struct inode *inode, loff_t newsize)
1232 struct udf_inode_info *iinfo;
1233 unsigned int bsize = i_blocksize(inode);
1235 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
1236 S_ISLNK(inode->i_mode)))
1238 if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
1241 iinfo = UDF_I(inode);
1242 if (newsize > inode->i_size) {
1243 down_write(&iinfo->i_data_sem);
1244 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
1246 (udf_file_entry_alloc_offset(inode) + newsize)) {
1247 err = udf_expand_file_adinicb(inode);
1250 down_write(&iinfo->i_data_sem);
1252 iinfo->i_lenAlloc = newsize;
1256 err = udf_extend_file(inode, newsize);
1258 up_write(&iinfo->i_data_sem);
1262 up_write(&iinfo->i_data_sem);
1263 truncate_setsize(inode, newsize);
1265 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
1266 down_write(&iinfo->i_data_sem);
1267 udf_clear_extent_cache(inode);
1268 memset(iinfo->i_data + iinfo->i_lenEAttr + newsize,
1269 0x00, bsize - newsize -
1270 udf_file_entry_alloc_offset(inode));
1271 iinfo->i_lenAlloc = newsize;
1272 truncate_setsize(inode, newsize);
1273 up_write(&iinfo->i_data_sem);
1276 err = block_truncate_page(inode->i_mapping, newsize,
1280 truncate_setsize(inode, newsize);
1281 down_write(&iinfo->i_data_sem);
1282 udf_clear_extent_cache(inode);
1283 err = udf_truncate_extents(inode);
1284 up_write(&iinfo->i_data_sem);
1289 inode->i_mtime = inode->i_ctime = current_time(inode);
1291 udf_sync_inode(inode);
1293 mark_inode_dirty(inode);
1298 * Maximum length of linked list formed by ICB hierarchy. The chosen number is
1299 * arbitrary - just that we hopefully don't limit any real use of rewritten
1300 * inode on write-once media but avoid looping for too long on corrupted media.
1302 #define UDF_MAX_ICB_NESTING 1024
1304 static int udf_read_inode(struct inode *inode, bool hidden_inode)
1306 struct buffer_head *bh = NULL;
1307 struct fileEntry *fe;
1308 struct extendedFileEntry *efe;
1310 struct udf_inode_info *iinfo = UDF_I(inode);
1311 struct udf_sb_info *sbi = UDF_SB(inode->i_sb);
1312 struct kernel_lb_addr *iloc = &iinfo->i_location;
1313 unsigned int link_count;
1314 unsigned int indirections = 0;
1315 int bs = inode->i_sb->s_blocksize;
1320 if (iloc->partitionReferenceNum >= sbi->s_partitions) {
1321 udf_debug("partition reference: %u > logical volume partitions: %u\n",
1322 iloc->partitionReferenceNum, sbi->s_partitions);
1326 if (iloc->logicalBlockNum >=
1327 sbi->s_partmaps[iloc->partitionReferenceNum].s_partition_len) {
1328 udf_debug("block=%u, partition=%u out of range\n",
1329 iloc->logicalBlockNum, iloc->partitionReferenceNum);
1334 * Set defaults, but the inode is still incomplete!
1335 * Note: get_new_inode() sets the following on a new inode:
1338 * i_flags = sb->s_flags
1340 * clean_inode(): zero fills and sets
1345 bh = udf_read_ptagged(inode->i_sb, iloc, 0, &ident);
1347 udf_err(inode->i_sb, "(ino %lu) failed !bh\n", inode->i_ino);
1351 if (ident != TAG_IDENT_FE && ident != TAG_IDENT_EFE &&
1352 ident != TAG_IDENT_USE) {
1353 udf_err(inode->i_sb, "(ino %lu) failed ident=%u\n",
1354 inode->i_ino, ident);
1358 fe = (struct fileEntry *)bh->b_data;
1359 efe = (struct extendedFileEntry *)bh->b_data;
1361 if (fe->icbTag.strategyType == cpu_to_le16(4096)) {
1362 struct buffer_head *ibh;
1364 ibh = udf_read_ptagged(inode->i_sb, iloc, 1, &ident);
1365 if (ident == TAG_IDENT_IE && ibh) {
1366 struct kernel_lb_addr loc;
1367 struct indirectEntry *ie;
1369 ie = (struct indirectEntry *)ibh->b_data;
1370 loc = lelb_to_cpu(ie->indirectICB.extLocation);
1372 if (ie->indirectICB.extLength) {
1374 memcpy(&iinfo->i_location, &loc,
1375 sizeof(struct kernel_lb_addr));
1376 if (++indirections > UDF_MAX_ICB_NESTING) {
1377 udf_err(inode->i_sb,
1378 "too many ICBs in ICB hierarchy"
1379 " (max %d supported)\n",
1380 UDF_MAX_ICB_NESTING);
1388 } else if (fe->icbTag.strategyType != cpu_to_le16(4)) {
1389 udf_err(inode->i_sb, "unsupported strategy type: %u\n",
1390 le16_to_cpu(fe->icbTag.strategyType));
1393 if (fe->icbTag.strategyType == cpu_to_le16(4))
1394 iinfo->i_strat4096 = 0;
1395 else /* if (fe->icbTag.strategyType == cpu_to_le16(4096)) */
1396 iinfo->i_strat4096 = 1;
1398 iinfo->i_alloc_type = le16_to_cpu(fe->icbTag.flags) &
1399 ICBTAG_FLAG_AD_MASK;
1400 if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_SHORT &&
1401 iinfo->i_alloc_type != ICBTAG_FLAG_AD_LONG &&
1402 iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
1406 iinfo->i_unique = 0;
1407 iinfo->i_lenEAttr = 0;
1408 iinfo->i_lenExtents = 0;
1409 iinfo->i_lenAlloc = 0;
1410 iinfo->i_next_alloc_block = 0;
1411 iinfo->i_next_alloc_goal = 0;
1412 if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_EFE)) {
1415 ret = udf_alloc_i_data(inode, bs -
1416 sizeof(struct extendedFileEntry));
1419 memcpy(iinfo->i_data,
1420 bh->b_data + sizeof(struct extendedFileEntry),
1421 bs - sizeof(struct extendedFileEntry));
1422 } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_FE)) {
1425 ret = udf_alloc_i_data(inode, bs - sizeof(struct fileEntry));
1428 memcpy(iinfo->i_data,
1429 bh->b_data + sizeof(struct fileEntry),
1430 bs - sizeof(struct fileEntry));
1431 } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_USE)) {
1434 iinfo->i_lenAlloc = le32_to_cpu(
1435 ((struct unallocSpaceEntry *)bh->b_data)->
1437 ret = udf_alloc_i_data(inode, bs -
1438 sizeof(struct unallocSpaceEntry));
1441 memcpy(iinfo->i_data,
1442 bh->b_data + sizeof(struct unallocSpaceEntry),
1443 bs - sizeof(struct unallocSpaceEntry));
1448 read_lock(&sbi->s_cred_lock);
1449 uid = le32_to_cpu(fe->uid);
1450 if (uid == UDF_INVALID_ID ||
1451 UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_SET))
1452 inode->i_uid = sbi->s_uid;
1454 i_uid_write(inode, uid);
1456 gid = le32_to_cpu(fe->gid);
1457 if (gid == UDF_INVALID_ID ||
1458 UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_SET))
1459 inode->i_gid = sbi->s_gid;
1461 i_gid_write(inode, gid);
1463 if (fe->icbTag.fileType != ICBTAG_FILE_TYPE_DIRECTORY &&
1464 sbi->s_fmode != UDF_INVALID_MODE)
1465 inode->i_mode = sbi->s_fmode;
1466 else if (fe->icbTag.fileType == ICBTAG_FILE_TYPE_DIRECTORY &&
1467 sbi->s_dmode != UDF_INVALID_MODE)
1468 inode->i_mode = sbi->s_dmode;
1470 inode->i_mode = udf_convert_permissions(fe);
1471 inode->i_mode &= ~sbi->s_umask;
1472 iinfo->i_extraPerms = le32_to_cpu(fe->permissions) & ~FE_MAPPED_PERMS;
1474 read_unlock(&sbi->s_cred_lock);
1476 link_count = le16_to_cpu(fe->fileLinkCount);
1478 if (!hidden_inode) {
1484 set_nlink(inode, link_count);
1486 inode->i_size = le64_to_cpu(fe->informationLength);
1487 iinfo->i_lenExtents = inode->i_size;
1489 if (iinfo->i_efe == 0) {
1490 inode->i_blocks = le64_to_cpu(fe->logicalBlocksRecorded) <<
1491 (inode->i_sb->s_blocksize_bits - 9);
1493 udf_disk_stamp_to_time(&inode->i_atime, fe->accessTime);
1494 udf_disk_stamp_to_time(&inode->i_mtime, fe->modificationTime);
1495 udf_disk_stamp_to_time(&inode->i_ctime, fe->attrTime);
1497 iinfo->i_unique = le64_to_cpu(fe->uniqueID);
1498 iinfo->i_lenEAttr = le32_to_cpu(fe->lengthExtendedAttr);
1499 iinfo->i_lenAlloc = le32_to_cpu(fe->lengthAllocDescs);
1500 iinfo->i_checkpoint = le32_to_cpu(fe->checkpoint);
1501 iinfo->i_streamdir = 0;
1502 iinfo->i_lenStreams = 0;
1504 inode->i_blocks = le64_to_cpu(efe->logicalBlocksRecorded) <<
1505 (inode->i_sb->s_blocksize_bits - 9);
1507 udf_disk_stamp_to_time(&inode->i_atime, efe->accessTime);
1508 udf_disk_stamp_to_time(&inode->i_mtime, efe->modificationTime);
1509 udf_disk_stamp_to_time(&iinfo->i_crtime, efe->createTime);
1510 udf_disk_stamp_to_time(&inode->i_ctime, efe->attrTime);
1512 iinfo->i_unique = le64_to_cpu(efe->uniqueID);
1513 iinfo->i_lenEAttr = le32_to_cpu(efe->lengthExtendedAttr);
1514 iinfo->i_lenAlloc = le32_to_cpu(efe->lengthAllocDescs);
1515 iinfo->i_checkpoint = le32_to_cpu(efe->checkpoint);
1518 iinfo->i_streamdir = (efe->streamDirectoryICB.extLength != 0);
1519 iinfo->i_locStreamdir =
1520 lelb_to_cpu(efe->streamDirectoryICB.extLocation);
1521 iinfo->i_lenStreams = le64_to_cpu(efe->objectSize);
1522 if (iinfo->i_lenStreams >= inode->i_size)
1523 iinfo->i_lenStreams -= inode->i_size;
1525 iinfo->i_lenStreams = 0;
1527 inode->i_generation = iinfo->i_unique;
1530 * Sanity check length of allocation descriptors and extended attrs to
1531 * avoid integer overflows
1533 if (iinfo->i_lenEAttr > bs || iinfo->i_lenAlloc > bs)
1535 /* Now do exact checks */
1536 if (udf_file_entry_alloc_offset(inode) + iinfo->i_lenAlloc > bs)
1538 /* Sanity checks for files in ICB so that we don't get confused later */
1539 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
1541 * For file in ICB data is stored in allocation descriptor
1542 * so sizes should match
1544 if (iinfo->i_lenAlloc != inode->i_size)
1546 /* File in ICB has to fit in there... */
1547 if (inode->i_size > bs - udf_file_entry_alloc_offset(inode))
1551 switch (fe->icbTag.fileType) {
1552 case ICBTAG_FILE_TYPE_DIRECTORY:
1553 inode->i_op = &udf_dir_inode_operations;
1554 inode->i_fop = &udf_dir_operations;
1555 inode->i_mode |= S_IFDIR;
1558 case ICBTAG_FILE_TYPE_REALTIME:
1559 case ICBTAG_FILE_TYPE_REGULAR:
1560 case ICBTAG_FILE_TYPE_UNDEF:
1561 case ICBTAG_FILE_TYPE_VAT20:
1562 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
1563 inode->i_data.a_ops = &udf_adinicb_aops;
1565 inode->i_data.a_ops = &udf_aops;
1566 inode->i_op = &udf_file_inode_operations;
1567 inode->i_fop = &udf_file_operations;
1568 inode->i_mode |= S_IFREG;
1570 case ICBTAG_FILE_TYPE_BLOCK:
1571 inode->i_mode |= S_IFBLK;
1573 case ICBTAG_FILE_TYPE_CHAR:
1574 inode->i_mode |= S_IFCHR;
1576 case ICBTAG_FILE_TYPE_FIFO:
1577 init_special_inode(inode, inode->i_mode | S_IFIFO, 0);
1579 case ICBTAG_FILE_TYPE_SOCKET:
1580 init_special_inode(inode, inode->i_mode | S_IFSOCK, 0);
1582 case ICBTAG_FILE_TYPE_SYMLINK:
1583 inode->i_data.a_ops = &udf_symlink_aops;
1584 inode->i_op = &udf_symlink_inode_operations;
1585 inode_nohighmem(inode);
1586 inode->i_mode = S_IFLNK | 0777;
1588 case ICBTAG_FILE_TYPE_MAIN:
1589 udf_debug("METADATA FILE-----\n");
1591 case ICBTAG_FILE_TYPE_MIRROR:
1592 udf_debug("METADATA MIRROR FILE-----\n");
1594 case ICBTAG_FILE_TYPE_BITMAP:
1595 udf_debug("METADATA BITMAP FILE-----\n");
1598 udf_err(inode->i_sb, "(ino %lu) failed unknown file type=%u\n",
1599 inode->i_ino, fe->icbTag.fileType);
1602 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
1603 struct deviceSpec *dsea =
1604 (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1);
1606 init_special_inode(inode, inode->i_mode,
1607 MKDEV(le32_to_cpu(dsea->majorDeviceIdent),
1608 le32_to_cpu(dsea->minorDeviceIdent)));
1609 /* Developer ID ??? */
1619 static int udf_alloc_i_data(struct inode *inode, size_t size)
1621 struct udf_inode_info *iinfo = UDF_I(inode);
1622 iinfo->i_data = kmalloc(size, GFP_KERNEL);
1628 static umode_t udf_convert_permissions(struct fileEntry *fe)
1631 uint32_t permissions;
1634 permissions = le32_to_cpu(fe->permissions);
1635 flags = le16_to_cpu(fe->icbTag.flags);
1637 mode = ((permissions) & 0007) |
1638 ((permissions >> 2) & 0070) |
1639 ((permissions >> 4) & 0700) |
1640 ((flags & ICBTAG_FLAG_SETUID) ? S_ISUID : 0) |
1641 ((flags & ICBTAG_FLAG_SETGID) ? S_ISGID : 0) |
1642 ((flags & ICBTAG_FLAG_STICKY) ? S_ISVTX : 0);
1647 void udf_update_extra_perms(struct inode *inode, umode_t mode)
1649 struct udf_inode_info *iinfo = UDF_I(inode);
1652 * UDF 2.01 sec. 3.3.3.3 Note 2:
1653 * In Unix, delete permission tracks write
1655 iinfo->i_extraPerms &= ~FE_DELETE_PERMS;
1657 iinfo->i_extraPerms |= FE_PERM_U_DELETE;
1659 iinfo->i_extraPerms |= FE_PERM_G_DELETE;
1661 iinfo->i_extraPerms |= FE_PERM_O_DELETE;
1664 int udf_write_inode(struct inode *inode, struct writeback_control *wbc)
1666 return udf_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL);
1669 static int udf_sync_inode(struct inode *inode)
1671 return udf_update_inode(inode, 1);
1674 static void udf_adjust_time(struct udf_inode_info *iinfo, struct timespec64 time)
1676 if (iinfo->i_crtime.tv_sec > time.tv_sec ||
1677 (iinfo->i_crtime.tv_sec == time.tv_sec &&
1678 iinfo->i_crtime.tv_nsec > time.tv_nsec))
1679 iinfo->i_crtime = time;
1682 static int udf_update_inode(struct inode *inode, int do_sync)
1684 struct buffer_head *bh = NULL;
1685 struct fileEntry *fe;
1686 struct extendedFileEntry *efe;
1687 uint64_t lb_recorded;
1692 struct udf_sb_info *sbi = UDF_SB(inode->i_sb);
1693 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits;
1694 struct udf_inode_info *iinfo = UDF_I(inode);
1696 bh = udf_tgetblk(inode->i_sb,
1697 udf_get_lb_pblock(inode->i_sb, &iinfo->i_location, 0));
1699 udf_debug("getblk failure\n");
1704 memset(bh->b_data, 0, inode->i_sb->s_blocksize);
1705 fe = (struct fileEntry *)bh->b_data;
1706 efe = (struct extendedFileEntry *)bh->b_data;
1709 struct unallocSpaceEntry *use =
1710 (struct unallocSpaceEntry *)bh->b_data;
1712 use->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc);
1713 memcpy(bh->b_data + sizeof(struct unallocSpaceEntry),
1714 iinfo->i_data, inode->i_sb->s_blocksize -
1715 sizeof(struct unallocSpaceEntry));
1716 use->descTag.tagIdent = cpu_to_le16(TAG_IDENT_USE);
1717 crclen = sizeof(struct unallocSpaceEntry);
1722 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_FORGET))
1723 fe->uid = cpu_to_le32(UDF_INVALID_ID);
1725 fe->uid = cpu_to_le32(i_uid_read(inode));
1727 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_FORGET))
1728 fe->gid = cpu_to_le32(UDF_INVALID_ID);
1730 fe->gid = cpu_to_le32(i_gid_read(inode));
1732 udfperms = ((inode->i_mode & 0007)) |
1733 ((inode->i_mode & 0070) << 2) |
1734 ((inode->i_mode & 0700) << 4);
1736 udfperms |= iinfo->i_extraPerms;
1737 fe->permissions = cpu_to_le32(udfperms);
1739 if (S_ISDIR(inode->i_mode) && inode->i_nlink > 0)
1740 fe->fileLinkCount = cpu_to_le16(inode->i_nlink - 1);
1742 fe->fileLinkCount = cpu_to_le16(inode->i_nlink);
1744 fe->informationLength = cpu_to_le64(inode->i_size);
1746 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
1748 struct deviceSpec *dsea =
1749 (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1);
1751 dsea = (struct deviceSpec *)
1752 udf_add_extendedattr(inode,
1753 sizeof(struct deviceSpec) +
1754 sizeof(struct regid), 12, 0x3);
1755 dsea->attrType = cpu_to_le32(12);
1756 dsea->attrSubtype = 1;
1757 dsea->attrLength = cpu_to_le32(
1758 sizeof(struct deviceSpec) +
1759 sizeof(struct regid));
1760 dsea->impUseLength = cpu_to_le32(sizeof(struct regid));
1762 eid = (struct regid *)dsea->impUse;
1763 memset(eid, 0, sizeof(*eid));
1764 strcpy(eid->ident, UDF_ID_DEVELOPER);
1765 eid->identSuffix[0] = UDF_OS_CLASS_UNIX;
1766 eid->identSuffix[1] = UDF_OS_ID_LINUX;
1767 dsea->majorDeviceIdent = cpu_to_le32(imajor(inode));
1768 dsea->minorDeviceIdent = cpu_to_le32(iminor(inode));
1771 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
1772 lb_recorded = 0; /* No extents => no blocks! */
1775 (inode->i_blocks + (1 << (blocksize_bits - 9)) - 1) >>
1776 (blocksize_bits - 9);
1778 if (iinfo->i_efe == 0) {
1779 memcpy(bh->b_data + sizeof(struct fileEntry),
1781 inode->i_sb->s_blocksize - sizeof(struct fileEntry));
1782 fe->logicalBlocksRecorded = cpu_to_le64(lb_recorded);
1784 udf_time_to_disk_stamp(&fe->accessTime, inode->i_atime);
1785 udf_time_to_disk_stamp(&fe->modificationTime, inode->i_mtime);
1786 udf_time_to_disk_stamp(&fe->attrTime, inode->i_ctime);
1787 memset(&(fe->impIdent), 0, sizeof(struct regid));
1788 strcpy(fe->impIdent.ident, UDF_ID_DEVELOPER);
1789 fe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1790 fe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1791 fe->uniqueID = cpu_to_le64(iinfo->i_unique);
1792 fe->lengthExtendedAttr = cpu_to_le32(iinfo->i_lenEAttr);
1793 fe->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc);
1794 fe->checkpoint = cpu_to_le32(iinfo->i_checkpoint);
1795 fe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_FE);
1796 crclen = sizeof(struct fileEntry);
1798 memcpy(bh->b_data + sizeof(struct extendedFileEntry),
1800 inode->i_sb->s_blocksize -
1801 sizeof(struct extendedFileEntry));
1803 cpu_to_le64(inode->i_size + iinfo->i_lenStreams);
1804 efe->logicalBlocksRecorded = cpu_to_le64(lb_recorded);
1806 if (iinfo->i_streamdir) {
1807 struct long_ad *icb_lad = &efe->streamDirectoryICB;
1809 icb_lad->extLocation =
1810 cpu_to_lelb(iinfo->i_locStreamdir);
1811 icb_lad->extLength =
1812 cpu_to_le32(inode->i_sb->s_blocksize);
1815 udf_adjust_time(iinfo, inode->i_atime);
1816 udf_adjust_time(iinfo, inode->i_mtime);
1817 udf_adjust_time(iinfo, inode->i_ctime);
1819 udf_time_to_disk_stamp(&efe->accessTime, inode->i_atime);
1820 udf_time_to_disk_stamp(&efe->modificationTime, inode->i_mtime);
1821 udf_time_to_disk_stamp(&efe->createTime, iinfo->i_crtime);
1822 udf_time_to_disk_stamp(&efe->attrTime, inode->i_ctime);
1824 memset(&(efe->impIdent), 0, sizeof(efe->impIdent));
1825 strcpy(efe->impIdent.ident, UDF_ID_DEVELOPER);
1826 efe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1827 efe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1828 efe->uniqueID = cpu_to_le64(iinfo->i_unique);
1829 efe->lengthExtendedAttr = cpu_to_le32(iinfo->i_lenEAttr);
1830 efe->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc);
1831 efe->checkpoint = cpu_to_le32(iinfo->i_checkpoint);
1832 efe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_EFE);
1833 crclen = sizeof(struct extendedFileEntry);
1837 if (iinfo->i_strat4096) {
1838 fe->icbTag.strategyType = cpu_to_le16(4096);
1839 fe->icbTag.strategyParameter = cpu_to_le16(1);
1840 fe->icbTag.numEntries = cpu_to_le16(2);
1842 fe->icbTag.strategyType = cpu_to_le16(4);
1843 fe->icbTag.numEntries = cpu_to_le16(1);
1847 fe->icbTag.fileType = ICBTAG_FILE_TYPE_USE;
1848 else if (S_ISDIR(inode->i_mode))
1849 fe->icbTag.fileType = ICBTAG_FILE_TYPE_DIRECTORY;
1850 else if (S_ISREG(inode->i_mode))
1851 fe->icbTag.fileType = ICBTAG_FILE_TYPE_REGULAR;
1852 else if (S_ISLNK(inode->i_mode))
1853 fe->icbTag.fileType = ICBTAG_FILE_TYPE_SYMLINK;
1854 else if (S_ISBLK(inode->i_mode))
1855 fe->icbTag.fileType = ICBTAG_FILE_TYPE_BLOCK;
1856 else if (S_ISCHR(inode->i_mode))
1857 fe->icbTag.fileType = ICBTAG_FILE_TYPE_CHAR;
1858 else if (S_ISFIFO(inode->i_mode))
1859 fe->icbTag.fileType = ICBTAG_FILE_TYPE_FIFO;
1860 else if (S_ISSOCK(inode->i_mode))
1861 fe->icbTag.fileType = ICBTAG_FILE_TYPE_SOCKET;
1863 icbflags = iinfo->i_alloc_type |
1864 ((inode->i_mode & S_ISUID) ? ICBTAG_FLAG_SETUID : 0) |
1865 ((inode->i_mode & S_ISGID) ? ICBTAG_FLAG_SETGID : 0) |
1866 ((inode->i_mode & S_ISVTX) ? ICBTAG_FLAG_STICKY : 0) |
1867 (le16_to_cpu(fe->icbTag.flags) &
1868 ~(ICBTAG_FLAG_AD_MASK | ICBTAG_FLAG_SETUID |
1869 ICBTAG_FLAG_SETGID | ICBTAG_FLAG_STICKY));
1871 fe->icbTag.flags = cpu_to_le16(icbflags);
1872 if (sbi->s_udfrev >= 0x0200)
1873 fe->descTag.descVersion = cpu_to_le16(3);
1875 fe->descTag.descVersion = cpu_to_le16(2);
1876 fe->descTag.tagSerialNum = cpu_to_le16(sbi->s_serial_number);
1877 fe->descTag.tagLocation = cpu_to_le32(
1878 iinfo->i_location.logicalBlockNum);
1879 crclen += iinfo->i_lenEAttr + iinfo->i_lenAlloc - sizeof(struct tag);
1880 fe->descTag.descCRCLength = cpu_to_le16(crclen);
1881 fe->descTag.descCRC = cpu_to_le16(crc_itu_t(0, (char *)fe + sizeof(struct tag),
1883 fe->descTag.tagChecksum = udf_tag_checksum(&fe->descTag);
1885 set_buffer_uptodate(bh);
1888 /* write the data blocks */
1889 mark_buffer_dirty(bh);
1891 sync_dirty_buffer(bh);
1892 if (buffer_write_io_error(bh)) {
1893 udf_warn(inode->i_sb, "IO error syncing udf inode [%08lx]\n",
1903 struct inode *__udf_iget(struct super_block *sb, struct kernel_lb_addr *ino,
1906 unsigned long block = udf_get_lb_pblock(sb, ino, 0);
1907 struct inode *inode = iget_locked(sb, block);
1911 return ERR_PTR(-ENOMEM);
1913 if (!(inode->i_state & I_NEW))
1916 memcpy(&UDF_I(inode)->i_location, ino, sizeof(struct kernel_lb_addr));
1917 err = udf_read_inode(inode, hidden_inode);
1920 return ERR_PTR(err);
1922 unlock_new_inode(inode);
1927 int udf_setup_indirect_aext(struct inode *inode, udf_pblk_t block,
1928 struct extent_position *epos)
1930 struct super_block *sb = inode->i_sb;
1931 struct buffer_head *bh;
1932 struct allocExtDesc *aed;
1933 struct extent_position nepos;
1934 struct kernel_lb_addr neloc;
1937 if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
1938 adsize = sizeof(struct short_ad);
1939 else if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_LONG)
1940 adsize = sizeof(struct long_ad);
1944 neloc.logicalBlockNum = block;
1945 neloc.partitionReferenceNum = epos->block.partitionReferenceNum;
1947 bh = udf_tgetblk(sb, udf_get_lb_pblock(sb, &neloc, 0));
1951 memset(bh->b_data, 0x00, sb->s_blocksize);
1952 set_buffer_uptodate(bh);
1954 mark_buffer_dirty_inode(bh, inode);
1956 aed = (struct allocExtDesc *)(bh->b_data);
1957 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_STRICT)) {
1958 aed->previousAllocExtLocation =
1959 cpu_to_le32(epos->block.logicalBlockNum);
1961 aed->lengthAllocDescs = cpu_to_le32(0);
1962 if (UDF_SB(sb)->s_udfrev >= 0x0200)
1966 udf_new_tag(bh->b_data, TAG_IDENT_AED, ver, 1, block,
1967 sizeof(struct tag));
1969 nepos.block = neloc;
1970 nepos.offset = sizeof(struct allocExtDesc);
1974 * Do we have to copy current last extent to make space for indirect
1977 if (epos->offset + adsize > sb->s_blocksize) {
1978 struct kernel_lb_addr cp_loc;
1982 epos->offset -= adsize;
1983 cp_type = udf_current_aext(inode, epos, &cp_loc, &cp_len, 0);
1984 cp_len |= ((uint32_t)cp_type) << 30;
1986 __udf_add_aext(inode, &nepos, &cp_loc, cp_len, 1);
1987 udf_write_aext(inode, epos, &nepos.block,
1988 sb->s_blocksize | EXT_NEXT_EXTENT_ALLOCDESCS, 0);
1990 __udf_add_aext(inode, epos, &nepos.block,
1991 sb->s_blocksize | EXT_NEXT_EXTENT_ALLOCDESCS, 0);
2001 * Append extent at the given position - should be the first free one in inode
2002 * / indirect extent. This function assumes there is enough space in the inode
2003 * or indirect extent. Use udf_add_aext() if you didn't check for this before.
2005 int __udf_add_aext(struct inode *inode, struct extent_position *epos,
2006 struct kernel_lb_addr *eloc, uint32_t elen, int inc)
2008 struct udf_inode_info *iinfo = UDF_I(inode);
2009 struct allocExtDesc *aed;
2012 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
2013 adsize = sizeof(struct short_ad);
2014 else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
2015 adsize = sizeof(struct long_ad);
2020 WARN_ON(iinfo->i_lenAlloc !=
2021 epos->offset - udf_file_entry_alloc_offset(inode));
2023 aed = (struct allocExtDesc *)epos->bh->b_data;
2024 WARN_ON(le32_to_cpu(aed->lengthAllocDescs) !=
2025 epos->offset - sizeof(struct allocExtDesc));
2026 WARN_ON(epos->offset + adsize > inode->i_sb->s_blocksize);
2029 udf_write_aext(inode, epos, eloc, elen, inc);
2032 iinfo->i_lenAlloc += adsize;
2033 mark_inode_dirty(inode);
2035 aed = (struct allocExtDesc *)epos->bh->b_data;
2036 le32_add_cpu(&aed->lengthAllocDescs, adsize);
2037 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
2038 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201)
2039 udf_update_tag(epos->bh->b_data,
2040 epos->offset + (inc ? 0 : adsize));
2042 udf_update_tag(epos->bh->b_data,
2043 sizeof(struct allocExtDesc));
2044 mark_buffer_dirty_inode(epos->bh, inode);
2051 * Append extent at given position - should be the first free one in inode
2052 * / indirect extent. Takes care of allocating and linking indirect blocks.
2054 int udf_add_aext(struct inode *inode, struct extent_position *epos,
2055 struct kernel_lb_addr *eloc, uint32_t elen, int inc)
2058 struct super_block *sb = inode->i_sb;
2060 if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
2061 adsize = sizeof(struct short_ad);
2062 else if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_LONG)
2063 adsize = sizeof(struct long_ad);
2067 if (epos->offset + (2 * adsize) > sb->s_blocksize) {
2069 udf_pblk_t new_block;
2071 new_block = udf_new_block(sb, NULL,
2072 epos->block.partitionReferenceNum,
2073 epos->block.logicalBlockNum, &err);
2077 err = udf_setup_indirect_aext(inode, new_block, epos);
2082 return __udf_add_aext(inode, epos, eloc, elen, inc);
2085 void udf_write_aext(struct inode *inode, struct extent_position *epos,
2086 struct kernel_lb_addr *eloc, uint32_t elen, int inc)
2090 struct short_ad *sad;
2091 struct long_ad *lad;
2092 struct udf_inode_info *iinfo = UDF_I(inode);
2095 ptr = iinfo->i_data + epos->offset -
2096 udf_file_entry_alloc_offset(inode) +
2099 ptr = epos->bh->b_data + epos->offset;
2101 switch (iinfo->i_alloc_type) {
2102 case ICBTAG_FLAG_AD_SHORT:
2103 sad = (struct short_ad *)ptr;
2104 sad->extLength = cpu_to_le32(elen);
2105 sad->extPosition = cpu_to_le32(eloc->logicalBlockNum);
2106 adsize = sizeof(struct short_ad);
2108 case ICBTAG_FLAG_AD_LONG:
2109 lad = (struct long_ad *)ptr;
2110 lad->extLength = cpu_to_le32(elen);
2111 lad->extLocation = cpu_to_lelb(*eloc);
2112 memset(lad->impUse, 0x00, sizeof(lad->impUse));
2113 adsize = sizeof(struct long_ad);
2120 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
2121 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) {
2122 struct allocExtDesc *aed =
2123 (struct allocExtDesc *)epos->bh->b_data;
2124 udf_update_tag(epos->bh->b_data,
2125 le32_to_cpu(aed->lengthAllocDescs) +
2126 sizeof(struct allocExtDesc));
2128 mark_buffer_dirty_inode(epos->bh, inode);
2130 mark_inode_dirty(inode);
2134 epos->offset += adsize;
2138 * Only 1 indirect extent in a row really makes sense but allow upto 16 in case
2139 * someone does some weird stuff.
2141 #define UDF_MAX_INDIR_EXTS 16
2143 int8_t udf_next_aext(struct inode *inode, struct extent_position *epos,
2144 struct kernel_lb_addr *eloc, uint32_t *elen, int inc)
2147 unsigned int indirections = 0;
2149 while ((etype = udf_current_aext(inode, epos, eloc, elen, inc)) ==
2150 (EXT_NEXT_EXTENT_ALLOCDESCS >> 30)) {
2153 if (++indirections > UDF_MAX_INDIR_EXTS) {
2154 udf_err(inode->i_sb,
2155 "too many indirect extents in inode %lu\n",
2160 epos->block = *eloc;
2161 epos->offset = sizeof(struct allocExtDesc);
2163 block = udf_get_lb_pblock(inode->i_sb, &epos->block, 0);
2164 epos->bh = udf_tread(inode->i_sb, block);
2166 udf_debug("reading block %u failed!\n", block);
2174 int8_t udf_current_aext(struct inode *inode, struct extent_position *epos,
2175 struct kernel_lb_addr *eloc, uint32_t *elen, int inc)
2180 struct short_ad *sad;
2181 struct long_ad *lad;
2182 struct udf_inode_info *iinfo = UDF_I(inode);
2186 epos->offset = udf_file_entry_alloc_offset(inode);
2187 ptr = iinfo->i_data + epos->offset -
2188 udf_file_entry_alloc_offset(inode) +
2190 alen = udf_file_entry_alloc_offset(inode) +
2194 epos->offset = sizeof(struct allocExtDesc);
2195 ptr = epos->bh->b_data + epos->offset;
2196 alen = sizeof(struct allocExtDesc) +
2197 le32_to_cpu(((struct allocExtDesc *)epos->bh->b_data)->
2201 switch (iinfo->i_alloc_type) {
2202 case ICBTAG_FLAG_AD_SHORT:
2203 sad = udf_get_fileshortad(ptr, alen, &epos->offset, inc);
2206 etype = le32_to_cpu(sad->extLength) >> 30;
2207 eloc->logicalBlockNum = le32_to_cpu(sad->extPosition);
2208 eloc->partitionReferenceNum =
2209 iinfo->i_location.partitionReferenceNum;
2210 *elen = le32_to_cpu(sad->extLength) & UDF_EXTENT_LENGTH_MASK;
2212 case ICBTAG_FLAG_AD_LONG:
2213 lad = udf_get_filelongad(ptr, alen, &epos->offset, inc);
2216 etype = le32_to_cpu(lad->extLength) >> 30;
2217 *eloc = lelb_to_cpu(lad->extLocation);
2218 *elen = le32_to_cpu(lad->extLength) & UDF_EXTENT_LENGTH_MASK;
2221 udf_debug("alloc_type = %u unsupported\n", iinfo->i_alloc_type);
2228 static int8_t udf_insert_aext(struct inode *inode, struct extent_position epos,
2229 struct kernel_lb_addr neloc, uint32_t nelen)
2231 struct kernel_lb_addr oeloc;
2238 while ((etype = udf_next_aext(inode, &epos, &oeloc, &oelen, 0)) != -1) {
2239 udf_write_aext(inode, &epos, &neloc, nelen, 1);
2241 nelen = (etype << 30) | oelen;
2243 udf_add_aext(inode, &epos, &neloc, nelen, 1);
2246 return (nelen >> 30);
2249 int8_t udf_delete_aext(struct inode *inode, struct extent_position epos)
2251 struct extent_position oepos;
2254 struct allocExtDesc *aed;
2255 struct udf_inode_info *iinfo;
2256 struct kernel_lb_addr eloc;
2264 iinfo = UDF_I(inode);
2265 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
2266 adsize = sizeof(struct short_ad);
2267 else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
2268 adsize = sizeof(struct long_ad);
2273 if (udf_next_aext(inode, &epos, &eloc, &elen, 1) == -1)
2276 while ((etype = udf_next_aext(inode, &epos, &eloc, &elen, 1)) != -1) {
2277 udf_write_aext(inode, &oepos, &eloc, (etype << 30) | elen, 1);
2278 if (oepos.bh != epos.bh) {
2279 oepos.block = epos.block;
2283 oepos.offset = epos.offset - adsize;
2286 memset(&eloc, 0x00, sizeof(struct kernel_lb_addr));
2289 if (epos.bh != oepos.bh) {
2290 udf_free_blocks(inode->i_sb, inode, &epos.block, 0, 1);
2291 udf_write_aext(inode, &oepos, &eloc, elen, 1);
2292 udf_write_aext(inode, &oepos, &eloc, elen, 1);
2294 iinfo->i_lenAlloc -= (adsize * 2);
2295 mark_inode_dirty(inode);
2297 aed = (struct allocExtDesc *)oepos.bh->b_data;
2298 le32_add_cpu(&aed->lengthAllocDescs, -(2 * adsize));
2299 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
2300 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201)
2301 udf_update_tag(oepos.bh->b_data,
2302 oepos.offset - (2 * adsize));
2304 udf_update_tag(oepos.bh->b_data,
2305 sizeof(struct allocExtDesc));
2306 mark_buffer_dirty_inode(oepos.bh, inode);
2309 udf_write_aext(inode, &oepos, &eloc, elen, 1);
2311 iinfo->i_lenAlloc -= adsize;
2312 mark_inode_dirty(inode);
2314 aed = (struct allocExtDesc *)oepos.bh->b_data;
2315 le32_add_cpu(&aed->lengthAllocDescs, -adsize);
2316 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
2317 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201)
2318 udf_update_tag(oepos.bh->b_data,
2319 epos.offset - adsize);
2321 udf_update_tag(oepos.bh->b_data,
2322 sizeof(struct allocExtDesc));
2323 mark_buffer_dirty_inode(oepos.bh, inode);
2330 return (elen >> 30);
2333 int8_t inode_bmap(struct inode *inode, sector_t block,
2334 struct extent_position *pos, struct kernel_lb_addr *eloc,
2335 uint32_t *elen, sector_t *offset)
2337 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits;
2338 loff_t lbcount = 0, bcount = (loff_t) block << blocksize_bits;
2340 struct udf_inode_info *iinfo;
2342 iinfo = UDF_I(inode);
2343 if (!udf_read_extent_cache(inode, bcount, &lbcount, pos)) {
2345 pos->block = iinfo->i_location;
2350 etype = udf_next_aext(inode, pos, eloc, elen, 1);
2352 *offset = (bcount - lbcount) >> blocksize_bits;
2353 iinfo->i_lenExtents = lbcount;
2357 } while (lbcount <= bcount);
2358 /* update extent cache */
2359 udf_update_extent_cache(inode, lbcount - *elen, pos);
2360 *offset = (bcount + *elen - lbcount) >> blocksize_bits;
2365 udf_pblk_t udf_block_map(struct inode *inode, sector_t block)
2367 struct kernel_lb_addr eloc;
2370 struct extent_position epos = {};
2373 down_read(&UDF_I(inode)->i_data_sem);
2375 if (inode_bmap(inode, block, &epos, &eloc, &elen, &offset) ==
2376 (EXT_RECORDED_ALLOCATED >> 30))
2377 ret = udf_get_lb_pblock(inode->i_sb, &eloc, offset);
2381 up_read(&UDF_I(inode)->i_data_sem);
2384 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_VARCONV))
2385 return udf_fixed_to_variable(ret);