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/smp_lock.h>
35 #include <linux/module.h>
36 #include <linux/pagemap.h>
37 #include <linux/buffer_head.h>
38 #include <linux/writeback.h>
39 #include <linux/slab.h>
40 #include <linux/crc-itu-t.h>
45 MODULE_AUTHOR("Ben Fennema");
46 MODULE_DESCRIPTION("Universal Disk Format Filesystem");
47 MODULE_LICENSE("GPL");
49 #define EXTENT_MERGE_SIZE 5
51 static mode_t udf_convert_permissions(struct fileEntry *);
52 static int udf_update_inode(struct inode *, int);
53 static void udf_fill_inode(struct inode *, struct buffer_head *);
54 static int udf_alloc_i_data(struct inode *inode, size_t size);
55 static struct buffer_head *inode_getblk(struct inode *, sector_t, int *,
57 static int8_t udf_insert_aext(struct inode *, struct extent_position,
58 struct kernel_lb_addr, uint32_t);
59 static void udf_split_extents(struct inode *, int *, int, int,
60 struct kernel_long_ad[EXTENT_MERGE_SIZE], int *);
61 static void udf_prealloc_extents(struct inode *, int, int,
62 struct kernel_long_ad[EXTENT_MERGE_SIZE], int *);
63 static void udf_merge_extents(struct inode *,
64 struct kernel_long_ad[EXTENT_MERGE_SIZE], int *);
65 static void udf_update_extents(struct inode *,
66 struct kernel_long_ad[EXTENT_MERGE_SIZE], int, int,
67 struct extent_position *);
68 static int udf_get_block(struct inode *, sector_t, struct buffer_head *, int);
71 void udf_delete_inode(struct inode *inode)
73 truncate_inode_pages(&inode->i_data, 0);
75 if (is_bad_inode(inode))
82 udf_update_inode(inode, IS_SYNC(inode));
83 udf_free_inode(inode);
93 * If we are going to release inode from memory, we discard preallocation and
94 * truncate last inode extent to proper length. We could use drop_inode() but
95 * it's called under inode_lock and thus we cannot mark inode dirty there. We
96 * use clear_inode() but we have to make sure to write inode as it's not written
99 void udf_clear_inode(struct inode *inode)
101 struct udf_inode_info *iinfo;
102 if (!(inode->i_sb->s_flags & MS_RDONLY)) {
104 /* Discard preallocation for directories, symlinks, etc. */
105 udf_discard_prealloc(inode);
106 udf_truncate_tail_extent(inode);
108 write_inode_now(inode, 0);
109 invalidate_inode_buffers(inode);
111 iinfo = UDF_I(inode);
112 kfree(iinfo->i_ext.i_data);
113 iinfo->i_ext.i_data = NULL;
116 static int udf_writepage(struct page *page, struct writeback_control *wbc)
118 return block_write_full_page(page, udf_get_block, wbc);
121 static int udf_readpage(struct file *file, struct page *page)
123 return block_read_full_page(page, udf_get_block);
126 static int udf_write_begin(struct file *file, struct address_space *mapping,
127 loff_t pos, unsigned len, unsigned flags,
128 struct page **pagep, void **fsdata)
131 return block_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
135 static sector_t udf_bmap(struct address_space *mapping, sector_t block)
137 return generic_block_bmap(mapping, block, udf_get_block);
140 const struct address_space_operations udf_aops = {
141 .readpage = udf_readpage,
142 .writepage = udf_writepage,
143 .sync_page = block_sync_page,
144 .write_begin = udf_write_begin,
145 .write_end = generic_write_end,
149 void udf_expand_file_adinicb(struct inode *inode, int newsize, int *err)
153 struct udf_inode_info *iinfo = UDF_I(inode);
154 struct writeback_control udf_wbc = {
155 .sync_mode = WB_SYNC_NONE,
159 /* from now on we have normal address_space methods */
160 inode->i_data.a_ops = &udf_aops;
162 if (!iinfo->i_lenAlloc) {
163 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))
164 iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT;
166 iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG;
167 mark_inode_dirty(inode);
171 page = grab_cache_page(inode->i_mapping, 0);
172 BUG_ON(!PageLocked(page));
174 if (!PageUptodate(page)) {
176 memset(kaddr + iinfo->i_lenAlloc, 0x00,
177 PAGE_CACHE_SIZE - iinfo->i_lenAlloc);
178 memcpy(kaddr, iinfo->i_ext.i_data + iinfo->i_lenEAttr,
180 flush_dcache_page(page);
181 SetPageUptodate(page);
184 memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr, 0x00,
186 iinfo->i_lenAlloc = 0;
187 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))
188 iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT;
190 iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG;
192 inode->i_data.a_ops->writepage(page, &udf_wbc);
193 page_cache_release(page);
195 mark_inode_dirty(inode);
198 struct buffer_head *udf_expand_dir_adinicb(struct inode *inode, int *block,
202 struct buffer_head *dbh = NULL;
203 struct kernel_lb_addr eloc;
206 struct extent_position epos;
208 struct udf_fileident_bh sfibh, dfibh;
209 loff_t f_pos = udf_ext0_offset(inode);
210 int size = udf_ext0_offset(inode) + inode->i_size;
211 struct fileIdentDesc cfi, *sfi, *dfi;
212 struct udf_inode_info *iinfo = UDF_I(inode);
214 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))
215 alloctype = ICBTAG_FLAG_AD_SHORT;
217 alloctype = ICBTAG_FLAG_AD_LONG;
219 if (!inode->i_size) {
220 iinfo->i_alloc_type = alloctype;
221 mark_inode_dirty(inode);
225 /* alloc block, and copy data to it */
226 *block = udf_new_block(inode->i_sb, inode,
227 iinfo->i_location.partitionReferenceNum,
228 iinfo->i_location.logicalBlockNum, err);
231 newblock = udf_get_pblock(inode->i_sb, *block,
232 iinfo->i_location.partitionReferenceNum,
236 dbh = udf_tgetblk(inode->i_sb, newblock);
240 memset(dbh->b_data, 0x00, inode->i_sb->s_blocksize);
241 set_buffer_uptodate(dbh);
243 mark_buffer_dirty_inode(dbh, inode);
245 sfibh.soffset = sfibh.eoffset =
246 f_pos & (inode->i_sb->s_blocksize - 1);
247 sfibh.sbh = sfibh.ebh = NULL;
248 dfibh.soffset = dfibh.eoffset = 0;
249 dfibh.sbh = dfibh.ebh = dbh;
250 while (f_pos < size) {
251 iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB;
252 sfi = udf_fileident_read(inode, &f_pos, &sfibh, &cfi, NULL,
258 iinfo->i_alloc_type = alloctype;
259 sfi->descTag.tagLocation = cpu_to_le32(*block);
260 dfibh.soffset = dfibh.eoffset;
261 dfibh.eoffset += (sfibh.eoffset - sfibh.soffset);
262 dfi = (struct fileIdentDesc *)(dbh->b_data + dfibh.soffset);
263 if (udf_write_fi(inode, sfi, dfi, &dfibh, sfi->impUse,
265 le16_to_cpu(sfi->lengthOfImpUse))) {
266 iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB;
271 mark_buffer_dirty_inode(dbh, inode);
273 memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr, 0,
275 iinfo->i_lenAlloc = 0;
276 eloc.logicalBlockNum = *block;
277 eloc.partitionReferenceNum =
278 iinfo->i_location.partitionReferenceNum;
279 elen = inode->i_sb->s_blocksize;
280 iinfo->i_lenExtents = elen;
282 epos.block = iinfo->i_location;
283 epos.offset = udf_file_entry_alloc_offset(inode);
284 udf_add_aext(inode, &epos, &eloc, elen, 0);
288 mark_inode_dirty(inode);
292 static int udf_get_block(struct inode *inode, sector_t block,
293 struct buffer_head *bh_result, int create)
296 struct buffer_head *bh;
298 struct udf_inode_info *iinfo;
301 phys = udf_block_map(inode, block);
303 map_bh(bh_result, inode->i_sb, phys);
313 iinfo = UDF_I(inode);
314 if (block == iinfo->i_next_alloc_block + 1) {
315 iinfo->i_next_alloc_block++;
316 iinfo->i_next_alloc_goal++;
321 bh = inode_getblk(inode, block, &err, &phys, &new);
328 set_buffer_new(bh_result);
329 map_bh(bh_result, inode->i_sb, phys);
336 static struct buffer_head *udf_getblk(struct inode *inode, long block,
337 int create, int *err)
339 struct buffer_head *bh;
340 struct buffer_head dummy;
343 dummy.b_blocknr = -1000;
344 *err = udf_get_block(inode, block, &dummy, create);
345 if (!*err && buffer_mapped(&dummy)) {
346 bh = sb_getblk(inode->i_sb, dummy.b_blocknr);
347 if (buffer_new(&dummy)) {
349 memset(bh->b_data, 0x00, inode->i_sb->s_blocksize);
350 set_buffer_uptodate(bh);
352 mark_buffer_dirty_inode(bh, inode);
360 /* Extend the file by 'blocks' blocks, return the number of extents added */
361 int udf_extend_file(struct inode *inode, struct extent_position *last_pos,
362 struct kernel_long_ad *last_ext, sector_t blocks)
365 int count = 0, fake = !(last_ext->extLength & UDF_EXTENT_LENGTH_MASK);
366 struct super_block *sb = inode->i_sb;
367 struct kernel_lb_addr prealloc_loc = {};
368 int prealloc_len = 0;
369 struct udf_inode_info *iinfo;
371 /* The previous extent is fake and we should not extend by anything
372 * - there's nothing to do... */
376 iinfo = UDF_I(inode);
377 /* Round the last extent up to a multiple of block size */
378 if (last_ext->extLength & (sb->s_blocksize - 1)) {
379 last_ext->extLength =
380 (last_ext->extLength & UDF_EXTENT_FLAG_MASK) |
381 (((last_ext->extLength & UDF_EXTENT_LENGTH_MASK) +
382 sb->s_blocksize - 1) & ~(sb->s_blocksize - 1));
383 iinfo->i_lenExtents =
384 (iinfo->i_lenExtents + sb->s_blocksize - 1) &
385 ~(sb->s_blocksize - 1);
388 /* Last extent are just preallocated blocks? */
389 if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) ==
390 EXT_NOT_RECORDED_ALLOCATED) {
391 /* Save the extent so that we can reattach it to the end */
392 prealloc_loc = last_ext->extLocation;
393 prealloc_len = last_ext->extLength;
394 /* Mark the extent as a hole */
395 last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED |
396 (last_ext->extLength & UDF_EXTENT_LENGTH_MASK);
397 last_ext->extLocation.logicalBlockNum = 0;
398 last_ext->extLocation.partitionReferenceNum = 0;
401 /* Can we merge with the previous extent? */
402 if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) ==
403 EXT_NOT_RECORDED_NOT_ALLOCATED) {
404 add = ((1 << 30) - sb->s_blocksize -
405 (last_ext->extLength & UDF_EXTENT_LENGTH_MASK)) >>
406 sb->s_blocksize_bits;
410 last_ext->extLength += add << sb->s_blocksize_bits;
414 udf_add_aext(inode, last_pos, &last_ext->extLocation,
415 last_ext->extLength, 1);
418 udf_write_aext(inode, last_pos, &last_ext->extLocation,
419 last_ext->extLength, 1);
421 /* Managed to do everything necessary? */
425 /* All further extents will be NOT_RECORDED_NOT_ALLOCATED */
426 last_ext->extLocation.logicalBlockNum = 0;
427 last_ext->extLocation.partitionReferenceNum = 0;
428 add = (1 << (30-sb->s_blocksize_bits)) - 1;
429 last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED |
430 (add << sb->s_blocksize_bits);
432 /* Create enough extents to cover the whole hole */
433 while (blocks > add) {
435 if (udf_add_aext(inode, last_pos, &last_ext->extLocation,
436 last_ext->extLength, 1) == -1)
441 last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED |
442 (blocks << sb->s_blocksize_bits);
443 if (udf_add_aext(inode, last_pos, &last_ext->extLocation,
444 last_ext->extLength, 1) == -1)
450 /* Do we have some preallocated blocks saved? */
452 if (udf_add_aext(inode, last_pos, &prealloc_loc,
453 prealloc_len, 1) == -1)
455 last_ext->extLocation = prealloc_loc;
456 last_ext->extLength = prealloc_len;
460 /* last_pos should point to the last written extent... */
461 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
462 last_pos->offset -= sizeof(struct short_ad);
463 else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
464 last_pos->offset -= sizeof(struct long_ad);
471 static struct buffer_head *inode_getblk(struct inode *inode, sector_t block,
472 int *err, sector_t *phys, int *new)
474 static sector_t last_block;
475 struct buffer_head *result = NULL;
476 struct kernel_long_ad laarr[EXTENT_MERGE_SIZE];
477 struct extent_position prev_epos, cur_epos, next_epos;
478 int count = 0, startnum = 0, endnum = 0;
479 uint32_t elen = 0, tmpelen;
480 struct kernel_lb_addr eloc, tmpeloc;
482 loff_t lbcount = 0, b_off = 0;
483 uint32_t newblocknum, newblock;
486 struct udf_inode_info *iinfo = UDF_I(inode);
487 int goal = 0, pgoal = iinfo->i_location.logicalBlockNum;
490 prev_epos.offset = udf_file_entry_alloc_offset(inode);
491 prev_epos.block = iinfo->i_location;
493 cur_epos = next_epos = prev_epos;
494 b_off = (loff_t)block << inode->i_sb->s_blocksize_bits;
496 /* find the extent which contains the block we are looking for.
497 alternate between laarr[0] and laarr[1] for locations of the
498 current extent, and the previous extent */
500 if (prev_epos.bh != cur_epos.bh) {
501 brelse(prev_epos.bh);
503 prev_epos.bh = cur_epos.bh;
505 if (cur_epos.bh != next_epos.bh) {
507 get_bh(next_epos.bh);
508 cur_epos.bh = next_epos.bh;
513 prev_epos.block = cur_epos.block;
514 cur_epos.block = next_epos.block;
516 prev_epos.offset = cur_epos.offset;
517 cur_epos.offset = next_epos.offset;
519 etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 1);
525 laarr[c].extLength = (etype << 30) | elen;
526 laarr[c].extLocation = eloc;
528 if (etype != (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))
529 pgoal = eloc.logicalBlockNum +
530 ((elen + inode->i_sb->s_blocksize - 1) >>
531 inode->i_sb->s_blocksize_bits);
534 } while (lbcount + elen <= b_off);
537 offset = b_off >> inode->i_sb->s_blocksize_bits;
539 * Move prev_epos and cur_epos into indirect extent if we are at
542 udf_next_aext(inode, &prev_epos, &tmpeloc, &tmpelen, 0);
543 udf_next_aext(inode, &cur_epos, &tmpeloc, &tmpelen, 0);
545 /* if the extent is allocated and recorded, return the block
546 if the extent is not a multiple of the blocksize, round up */
548 if (etype == (EXT_RECORDED_ALLOCATED >> 30)) {
549 if (elen & (inode->i_sb->s_blocksize - 1)) {
550 elen = EXT_RECORDED_ALLOCATED |
551 ((elen + inode->i_sb->s_blocksize - 1) &
552 ~(inode->i_sb->s_blocksize - 1));
553 etype = udf_write_aext(inode, &cur_epos, &eloc, elen, 1);
555 brelse(prev_epos.bh);
557 brelse(next_epos.bh);
558 newblock = udf_get_lb_pblock(inode->i_sb, &eloc, offset);
564 /* Are we beyond EOF? */
573 /* Create a fake extent when there's not one */
574 memset(&laarr[0].extLocation, 0x00,
575 sizeof(struct kernel_lb_addr));
576 laarr[0].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED;
577 /* Will udf_extend_file() create real extent from
579 startnum = (offset > 0);
581 /* Create extents for the hole between EOF and offset */
582 ret = udf_extend_file(inode, &prev_epos, laarr, offset);
584 brelse(prev_epos.bh);
586 brelse(next_epos.bh);
587 /* We don't really know the error here so we just make
595 /* We are not covered by a preallocated extent? */
596 if ((laarr[0].extLength & UDF_EXTENT_FLAG_MASK) !=
597 EXT_NOT_RECORDED_ALLOCATED) {
598 /* Is there any real extent? - otherwise we overwrite
602 laarr[c].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED |
603 inode->i_sb->s_blocksize;
604 memset(&laarr[c].extLocation, 0x00,
605 sizeof(struct kernel_lb_addr));
612 endnum = startnum = ((count > 2) ? 2 : count);
614 /* if the current extent is in position 0,
615 swap it with the previous */
616 if (!c && count != 1) {
623 /* if the current block is located in an extent,
624 read the next extent */
625 etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 0);
627 laarr[c + 1].extLength = (etype << 30) | elen;
628 laarr[c + 1].extLocation = eloc;
636 /* if the current extent is not recorded but allocated, get the
637 * block in the extent corresponding to the requested block */
638 if ((laarr[c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30))
639 newblocknum = laarr[c].extLocation.logicalBlockNum + offset;
640 else { /* otherwise, allocate a new block */
641 if (iinfo->i_next_alloc_block == block)
642 goal = iinfo->i_next_alloc_goal;
645 if (!(goal = pgoal)) /* XXX: what was intended here? */
646 goal = iinfo->i_location.logicalBlockNum + 1;
649 newblocknum = udf_new_block(inode->i_sb, inode,
650 iinfo->i_location.partitionReferenceNum,
653 brelse(prev_epos.bh);
657 iinfo->i_lenExtents += inode->i_sb->s_blocksize;
660 /* if the extent the requsted block is located in contains multiple
661 * blocks, split the extent into at most three extents. blocks prior
662 * to requested block, requested block, and blocks after requested
664 udf_split_extents(inode, &c, offset, newblocknum, laarr, &endnum);
666 #ifdef UDF_PREALLOCATE
667 /* preallocate blocks */
668 udf_prealloc_extents(inode, c, lastblock, laarr, &endnum);
671 /* merge any continuous blocks in laarr */
672 udf_merge_extents(inode, laarr, &endnum);
674 /* write back the new extents, inserting new extents if the new number
675 * of extents is greater than the old number, and deleting extents if
676 * the new number of extents is less than the old number */
677 udf_update_extents(inode, laarr, startnum, endnum, &prev_epos);
679 brelse(prev_epos.bh);
681 newblock = udf_get_pblock(inode->i_sb, newblocknum,
682 iinfo->i_location.partitionReferenceNum, 0);
688 iinfo->i_next_alloc_block = block;
689 iinfo->i_next_alloc_goal = newblocknum;
690 inode->i_ctime = current_fs_time(inode->i_sb);
693 udf_sync_inode(inode);
695 mark_inode_dirty(inode);
700 static void udf_split_extents(struct inode *inode, int *c, int offset,
702 struct kernel_long_ad laarr[EXTENT_MERGE_SIZE],
705 unsigned long blocksize = inode->i_sb->s_blocksize;
706 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits;
708 if ((laarr[*c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30) ||
709 (laarr[*c].extLength >> 30) ==
710 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) {
712 int blen = ((laarr[curr].extLength & UDF_EXTENT_LENGTH_MASK) +
713 blocksize - 1) >> blocksize_bits;
714 int8_t etype = (laarr[curr].extLength >> 30);
718 else if (!offset || blen == offset + 1) {
719 laarr[curr + 2] = laarr[curr + 1];
720 laarr[curr + 1] = laarr[curr];
722 laarr[curr + 3] = laarr[curr + 1];
723 laarr[curr + 2] = laarr[curr + 1] = laarr[curr];
727 if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30)) {
728 udf_free_blocks(inode->i_sb, inode,
729 &laarr[curr].extLocation,
731 laarr[curr].extLength =
732 EXT_NOT_RECORDED_NOT_ALLOCATED |
733 (offset << blocksize_bits);
734 laarr[curr].extLocation.logicalBlockNum = 0;
735 laarr[curr].extLocation.
736 partitionReferenceNum = 0;
738 laarr[curr].extLength = (etype << 30) |
739 (offset << blocksize_bits);
745 laarr[curr].extLocation.logicalBlockNum = newblocknum;
746 if (etype == (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))
747 laarr[curr].extLocation.partitionReferenceNum =
748 UDF_I(inode)->i_location.partitionReferenceNum;
749 laarr[curr].extLength = EXT_RECORDED_ALLOCATED |
753 if (blen != offset + 1) {
754 if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30))
755 laarr[curr].extLocation.logicalBlockNum +=
757 laarr[curr].extLength = (etype << 30) |
758 ((blen - (offset + 1)) << blocksize_bits);
765 static void udf_prealloc_extents(struct inode *inode, int c, int lastblock,
766 struct kernel_long_ad laarr[EXTENT_MERGE_SIZE],
769 int start, length = 0, currlength = 0, i;
771 if (*endnum >= (c + 1)) {
777 if ((laarr[c + 1].extLength >> 30) ==
778 (EXT_NOT_RECORDED_ALLOCATED >> 30)) {
780 length = currlength =
781 (((laarr[c + 1].extLength &
782 UDF_EXTENT_LENGTH_MASK) +
783 inode->i_sb->s_blocksize - 1) >>
784 inode->i_sb->s_blocksize_bits);
789 for (i = start + 1; i <= *endnum; i++) {
792 length += UDF_DEFAULT_PREALLOC_BLOCKS;
793 } else if ((laarr[i].extLength >> 30) ==
794 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) {
795 length += (((laarr[i].extLength &
796 UDF_EXTENT_LENGTH_MASK) +
797 inode->i_sb->s_blocksize - 1) >>
798 inode->i_sb->s_blocksize_bits);
804 int next = laarr[start].extLocation.logicalBlockNum +
805 (((laarr[start].extLength & UDF_EXTENT_LENGTH_MASK) +
806 inode->i_sb->s_blocksize - 1) >>
807 inode->i_sb->s_blocksize_bits);
808 int numalloc = udf_prealloc_blocks(inode->i_sb, inode,
809 laarr[start].extLocation.partitionReferenceNum,
810 next, (UDF_DEFAULT_PREALLOC_BLOCKS > length ?
811 length : UDF_DEFAULT_PREALLOC_BLOCKS) -
814 if (start == (c + 1))
815 laarr[start].extLength +=
817 inode->i_sb->s_blocksize_bits);
819 memmove(&laarr[c + 2], &laarr[c + 1],
820 sizeof(struct long_ad) * (*endnum - (c + 1)));
822 laarr[c + 1].extLocation.logicalBlockNum = next;
823 laarr[c + 1].extLocation.partitionReferenceNum =
824 laarr[c].extLocation.
825 partitionReferenceNum;
826 laarr[c + 1].extLength =
827 EXT_NOT_RECORDED_ALLOCATED |
829 inode->i_sb->s_blocksize_bits);
833 for (i = start + 1; numalloc && i < *endnum; i++) {
834 int elen = ((laarr[i].extLength &
835 UDF_EXTENT_LENGTH_MASK) +
836 inode->i_sb->s_blocksize - 1) >>
837 inode->i_sb->s_blocksize_bits;
839 if (elen > numalloc) {
840 laarr[i].extLength -=
842 inode->i_sb->s_blocksize_bits);
846 if (*endnum > (i + 1))
849 sizeof(struct long_ad) *
850 (*endnum - (i + 1)));
855 UDF_I(inode)->i_lenExtents +=
856 numalloc << inode->i_sb->s_blocksize_bits;
861 static void udf_merge_extents(struct inode *inode,
862 struct kernel_long_ad laarr[EXTENT_MERGE_SIZE],
866 unsigned long blocksize = inode->i_sb->s_blocksize;
867 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits;
869 for (i = 0; i < (*endnum - 1); i++) {
870 struct kernel_long_ad *li /*l[i]*/ = &laarr[i];
871 struct kernel_long_ad *lip1 /*l[i plus 1]*/ = &laarr[i + 1];
873 if (((li->extLength >> 30) == (lip1->extLength >> 30)) &&
874 (((li->extLength >> 30) ==
875 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) ||
876 ((lip1->extLocation.logicalBlockNum -
877 li->extLocation.logicalBlockNum) ==
878 (((li->extLength & UDF_EXTENT_LENGTH_MASK) +
879 blocksize - 1) >> blocksize_bits)))) {
881 if (((li->extLength & UDF_EXTENT_LENGTH_MASK) +
882 (lip1->extLength & UDF_EXTENT_LENGTH_MASK) +
883 blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) {
884 lip1->extLength = (lip1->extLength -
886 UDF_EXTENT_LENGTH_MASK) +
887 UDF_EXTENT_LENGTH_MASK) &
889 li->extLength = (li->extLength &
890 UDF_EXTENT_FLAG_MASK) +
891 (UDF_EXTENT_LENGTH_MASK + 1) -
893 lip1->extLocation.logicalBlockNum =
894 li->extLocation.logicalBlockNum +
896 UDF_EXTENT_LENGTH_MASK) >>
899 li->extLength = lip1->extLength +
901 UDF_EXTENT_LENGTH_MASK) +
902 blocksize - 1) & ~(blocksize - 1));
903 if (*endnum > (i + 2))
904 memmove(&laarr[i + 1], &laarr[i + 2],
905 sizeof(struct long_ad) *
906 (*endnum - (i + 2)));
910 } else if (((li->extLength >> 30) ==
911 (EXT_NOT_RECORDED_ALLOCATED >> 30)) &&
912 ((lip1->extLength >> 30) ==
913 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))) {
914 udf_free_blocks(inode->i_sb, inode, &li->extLocation, 0,
916 UDF_EXTENT_LENGTH_MASK) +
917 blocksize - 1) >> blocksize_bits);
918 li->extLocation.logicalBlockNum = 0;
919 li->extLocation.partitionReferenceNum = 0;
921 if (((li->extLength & UDF_EXTENT_LENGTH_MASK) +
922 (lip1->extLength & UDF_EXTENT_LENGTH_MASK) +
923 blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) {
924 lip1->extLength = (lip1->extLength -
926 UDF_EXTENT_LENGTH_MASK) +
927 UDF_EXTENT_LENGTH_MASK) &
929 li->extLength = (li->extLength &
930 UDF_EXTENT_FLAG_MASK) +
931 (UDF_EXTENT_LENGTH_MASK + 1) -
934 li->extLength = lip1->extLength +
936 UDF_EXTENT_LENGTH_MASK) +
937 blocksize - 1) & ~(blocksize - 1));
938 if (*endnum > (i + 2))
939 memmove(&laarr[i + 1], &laarr[i + 2],
940 sizeof(struct long_ad) *
941 (*endnum - (i + 2)));
945 } else if ((li->extLength >> 30) ==
946 (EXT_NOT_RECORDED_ALLOCATED >> 30)) {
947 udf_free_blocks(inode->i_sb, inode,
950 UDF_EXTENT_LENGTH_MASK) +
951 blocksize - 1) >> blocksize_bits);
952 li->extLocation.logicalBlockNum = 0;
953 li->extLocation.partitionReferenceNum = 0;
954 li->extLength = (li->extLength &
955 UDF_EXTENT_LENGTH_MASK) |
956 EXT_NOT_RECORDED_NOT_ALLOCATED;
961 static void udf_update_extents(struct inode *inode,
962 struct kernel_long_ad laarr[EXTENT_MERGE_SIZE],
963 int startnum, int endnum,
964 struct extent_position *epos)
967 struct kernel_lb_addr tmploc;
970 if (startnum > endnum) {
971 for (i = 0; i < (startnum - endnum); i++)
972 udf_delete_aext(inode, *epos, laarr[i].extLocation,
974 } else if (startnum < endnum) {
975 for (i = 0; i < (endnum - startnum); i++) {
976 udf_insert_aext(inode, *epos, laarr[i].extLocation,
978 udf_next_aext(inode, epos, &laarr[i].extLocation,
979 &laarr[i].extLength, 1);
984 for (i = start; i < endnum; i++) {
985 udf_next_aext(inode, epos, &tmploc, &tmplen, 0);
986 udf_write_aext(inode, epos, &laarr[i].extLocation,
987 laarr[i].extLength, 1);
991 struct buffer_head *udf_bread(struct inode *inode, int block,
992 int create, int *err)
994 struct buffer_head *bh = NULL;
996 bh = udf_getblk(inode, block, create, err);
1000 if (buffer_uptodate(bh))
1003 ll_rw_block(READ, 1, &bh);
1006 if (buffer_uptodate(bh))
1014 void udf_truncate(struct inode *inode)
1018 struct udf_inode_info *iinfo;
1020 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
1021 S_ISLNK(inode->i_mode)))
1023 if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
1027 iinfo = UDF_I(inode);
1028 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
1029 if (inode->i_sb->s_blocksize <
1030 (udf_file_entry_alloc_offset(inode) +
1032 udf_expand_file_adinicb(inode, inode->i_size, &err);
1033 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
1034 inode->i_size = iinfo->i_lenAlloc;
1038 udf_truncate_extents(inode);
1040 offset = inode->i_size & (inode->i_sb->s_blocksize - 1);
1041 memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr + offset,
1042 0x00, inode->i_sb->s_blocksize -
1043 offset - udf_file_entry_alloc_offset(inode));
1044 iinfo->i_lenAlloc = inode->i_size;
1047 block_truncate_page(inode->i_mapping, inode->i_size,
1049 udf_truncate_extents(inode);
1052 inode->i_mtime = inode->i_ctime = current_fs_time(inode->i_sb);
1054 udf_sync_inode(inode);
1056 mark_inode_dirty(inode);
1060 static void __udf_read_inode(struct inode *inode)
1062 struct buffer_head *bh = NULL;
1063 struct fileEntry *fe;
1065 struct udf_inode_info *iinfo = UDF_I(inode);
1068 * Set defaults, but the inode is still incomplete!
1069 * Note: get_new_inode() sets the following on a new inode:
1072 * i_flags = sb->s_flags
1074 * clean_inode(): zero fills and sets
1079 bh = udf_read_ptagged(inode->i_sb, &iinfo->i_location, 0, &ident);
1081 printk(KERN_ERR "udf: udf_read_inode(ino %ld) failed !bh\n",
1083 make_bad_inode(inode);
1087 if (ident != TAG_IDENT_FE && ident != TAG_IDENT_EFE &&
1088 ident != TAG_IDENT_USE) {
1089 printk(KERN_ERR "udf: udf_read_inode(ino %ld) "
1090 "failed ident=%d\n", inode->i_ino, ident);
1092 make_bad_inode(inode);
1096 fe = (struct fileEntry *)bh->b_data;
1098 if (fe->icbTag.strategyType == cpu_to_le16(4096)) {
1099 struct buffer_head *ibh;
1101 ibh = udf_read_ptagged(inode->i_sb, &iinfo->i_location, 1,
1103 if (ident == TAG_IDENT_IE && ibh) {
1104 struct buffer_head *nbh = NULL;
1105 struct kernel_lb_addr loc;
1106 struct indirectEntry *ie;
1108 ie = (struct indirectEntry *)ibh->b_data;
1109 loc = lelb_to_cpu(ie->indirectICB.extLocation);
1111 if (ie->indirectICB.extLength &&
1112 (nbh = udf_read_ptagged(inode->i_sb, &loc, 0,
1114 if (ident == TAG_IDENT_FE ||
1115 ident == TAG_IDENT_EFE) {
1116 memcpy(&iinfo->i_location,
1118 sizeof(struct kernel_lb_addr));
1122 __udf_read_inode(inode);
1129 } else if (fe->icbTag.strategyType != cpu_to_le16(4)) {
1130 printk(KERN_ERR "udf: unsupported strategy type: %d\n",
1131 le16_to_cpu(fe->icbTag.strategyType));
1133 make_bad_inode(inode);
1136 udf_fill_inode(inode, bh);
1141 static void udf_fill_inode(struct inode *inode, struct buffer_head *bh)
1143 struct fileEntry *fe;
1144 struct extendedFileEntry *efe;
1146 struct udf_sb_info *sbi = UDF_SB(inode->i_sb);
1147 struct udf_inode_info *iinfo = UDF_I(inode);
1149 fe = (struct fileEntry *)bh->b_data;
1150 efe = (struct extendedFileEntry *)bh->b_data;
1152 if (fe->icbTag.strategyType == cpu_to_le16(4))
1153 iinfo->i_strat4096 = 0;
1154 else /* if (fe->icbTag.strategyType == cpu_to_le16(4096)) */
1155 iinfo->i_strat4096 = 1;
1157 iinfo->i_alloc_type = le16_to_cpu(fe->icbTag.flags) &
1158 ICBTAG_FLAG_AD_MASK;
1159 iinfo->i_unique = 0;
1160 iinfo->i_lenEAttr = 0;
1161 iinfo->i_lenExtents = 0;
1162 iinfo->i_lenAlloc = 0;
1163 iinfo->i_next_alloc_block = 0;
1164 iinfo->i_next_alloc_goal = 0;
1165 if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_EFE)) {
1168 if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize -
1169 sizeof(struct extendedFileEntry))) {
1170 make_bad_inode(inode);
1173 memcpy(iinfo->i_ext.i_data,
1174 bh->b_data + sizeof(struct extendedFileEntry),
1175 inode->i_sb->s_blocksize -
1176 sizeof(struct extendedFileEntry));
1177 } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_FE)) {
1180 if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize -
1181 sizeof(struct fileEntry))) {
1182 make_bad_inode(inode);
1185 memcpy(iinfo->i_ext.i_data,
1186 bh->b_data + sizeof(struct fileEntry),
1187 inode->i_sb->s_blocksize - sizeof(struct fileEntry));
1188 } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_USE)) {
1191 iinfo->i_lenAlloc = le32_to_cpu(
1192 ((struct unallocSpaceEntry *)bh->b_data)->
1194 if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize -
1195 sizeof(struct unallocSpaceEntry))) {
1196 make_bad_inode(inode);
1199 memcpy(iinfo->i_ext.i_data,
1200 bh->b_data + sizeof(struct unallocSpaceEntry),
1201 inode->i_sb->s_blocksize -
1202 sizeof(struct unallocSpaceEntry));
1206 inode->i_uid = le32_to_cpu(fe->uid);
1207 if (inode->i_uid == -1 ||
1208 UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_IGNORE) ||
1209 UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_SET))
1210 inode->i_uid = UDF_SB(inode->i_sb)->s_uid;
1212 inode->i_gid = le32_to_cpu(fe->gid);
1213 if (inode->i_gid == -1 ||
1214 UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_IGNORE) ||
1215 UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_SET))
1216 inode->i_gid = UDF_SB(inode->i_sb)->s_gid;
1218 inode->i_nlink = le16_to_cpu(fe->fileLinkCount);
1219 if (!inode->i_nlink)
1222 inode->i_size = le64_to_cpu(fe->informationLength);
1223 iinfo->i_lenExtents = inode->i_size;
1225 if (fe->icbTag.fileType != ICBTAG_FILE_TYPE_DIRECTORY &&
1226 sbi->s_fmode != UDF_INVALID_MODE)
1227 inode->i_mode = sbi->s_fmode;
1228 else if (fe->icbTag.fileType == ICBTAG_FILE_TYPE_DIRECTORY &&
1229 sbi->s_dmode != UDF_INVALID_MODE)
1230 inode->i_mode = sbi->s_dmode;
1232 inode->i_mode = udf_convert_permissions(fe);
1233 inode->i_mode &= ~sbi->s_umask;
1235 if (iinfo->i_efe == 0) {
1236 inode->i_blocks = le64_to_cpu(fe->logicalBlocksRecorded) <<
1237 (inode->i_sb->s_blocksize_bits - 9);
1239 if (!udf_disk_stamp_to_time(&inode->i_atime, fe->accessTime))
1240 inode->i_atime = sbi->s_record_time;
1242 if (!udf_disk_stamp_to_time(&inode->i_mtime,
1243 fe->modificationTime))
1244 inode->i_mtime = sbi->s_record_time;
1246 if (!udf_disk_stamp_to_time(&inode->i_ctime, fe->attrTime))
1247 inode->i_ctime = sbi->s_record_time;
1249 iinfo->i_unique = le64_to_cpu(fe->uniqueID);
1250 iinfo->i_lenEAttr = le32_to_cpu(fe->lengthExtendedAttr);
1251 iinfo->i_lenAlloc = le32_to_cpu(fe->lengthAllocDescs);
1252 offset = sizeof(struct fileEntry) + iinfo->i_lenEAttr;
1254 inode->i_blocks = le64_to_cpu(efe->logicalBlocksRecorded) <<
1255 (inode->i_sb->s_blocksize_bits - 9);
1257 if (!udf_disk_stamp_to_time(&inode->i_atime, efe->accessTime))
1258 inode->i_atime = sbi->s_record_time;
1260 if (!udf_disk_stamp_to_time(&inode->i_mtime,
1261 efe->modificationTime))
1262 inode->i_mtime = sbi->s_record_time;
1264 if (!udf_disk_stamp_to_time(&iinfo->i_crtime, efe->createTime))
1265 iinfo->i_crtime = sbi->s_record_time;
1267 if (!udf_disk_stamp_to_time(&inode->i_ctime, efe->attrTime))
1268 inode->i_ctime = sbi->s_record_time;
1270 iinfo->i_unique = le64_to_cpu(efe->uniqueID);
1271 iinfo->i_lenEAttr = le32_to_cpu(efe->lengthExtendedAttr);
1272 iinfo->i_lenAlloc = le32_to_cpu(efe->lengthAllocDescs);
1273 offset = sizeof(struct extendedFileEntry) +
1277 switch (fe->icbTag.fileType) {
1278 case ICBTAG_FILE_TYPE_DIRECTORY:
1279 inode->i_op = &udf_dir_inode_operations;
1280 inode->i_fop = &udf_dir_operations;
1281 inode->i_mode |= S_IFDIR;
1284 case ICBTAG_FILE_TYPE_REALTIME:
1285 case ICBTAG_FILE_TYPE_REGULAR:
1286 case ICBTAG_FILE_TYPE_UNDEF:
1287 case ICBTAG_FILE_TYPE_VAT20:
1288 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
1289 inode->i_data.a_ops = &udf_adinicb_aops;
1291 inode->i_data.a_ops = &udf_aops;
1292 inode->i_op = &udf_file_inode_operations;
1293 inode->i_fop = &udf_file_operations;
1294 inode->i_mode |= S_IFREG;
1296 case ICBTAG_FILE_TYPE_BLOCK:
1297 inode->i_mode |= S_IFBLK;
1299 case ICBTAG_FILE_TYPE_CHAR:
1300 inode->i_mode |= S_IFCHR;
1302 case ICBTAG_FILE_TYPE_FIFO:
1303 init_special_inode(inode, inode->i_mode | S_IFIFO, 0);
1305 case ICBTAG_FILE_TYPE_SOCKET:
1306 init_special_inode(inode, inode->i_mode | S_IFSOCK, 0);
1308 case ICBTAG_FILE_TYPE_SYMLINK:
1309 inode->i_data.a_ops = &udf_symlink_aops;
1310 inode->i_op = &page_symlink_inode_operations;
1311 inode->i_mode = S_IFLNK | S_IRWXUGO;
1313 case ICBTAG_FILE_TYPE_MAIN:
1314 udf_debug("METADATA FILE-----\n");
1316 case ICBTAG_FILE_TYPE_MIRROR:
1317 udf_debug("METADATA MIRROR FILE-----\n");
1319 case ICBTAG_FILE_TYPE_BITMAP:
1320 udf_debug("METADATA BITMAP FILE-----\n");
1323 printk(KERN_ERR "udf: udf_fill_inode(ino %ld) failed unknown "
1324 "file type=%d\n", inode->i_ino,
1325 fe->icbTag.fileType);
1326 make_bad_inode(inode);
1329 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
1330 struct deviceSpec *dsea =
1331 (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1);
1333 init_special_inode(inode, inode->i_mode,
1334 MKDEV(le32_to_cpu(dsea->majorDeviceIdent),
1335 le32_to_cpu(dsea->minorDeviceIdent)));
1336 /* Developer ID ??? */
1338 make_bad_inode(inode);
1342 static int udf_alloc_i_data(struct inode *inode, size_t size)
1344 struct udf_inode_info *iinfo = UDF_I(inode);
1345 iinfo->i_ext.i_data = kmalloc(size, GFP_KERNEL);
1347 if (!iinfo->i_ext.i_data) {
1348 printk(KERN_ERR "udf:udf_alloc_i_data (ino %ld) "
1349 "no free memory\n", inode->i_ino);
1356 static mode_t udf_convert_permissions(struct fileEntry *fe)
1359 uint32_t permissions;
1362 permissions = le32_to_cpu(fe->permissions);
1363 flags = le16_to_cpu(fe->icbTag.flags);
1365 mode = ((permissions) & S_IRWXO) |
1366 ((permissions >> 2) & S_IRWXG) |
1367 ((permissions >> 4) & S_IRWXU) |
1368 ((flags & ICBTAG_FLAG_SETUID) ? S_ISUID : 0) |
1369 ((flags & ICBTAG_FLAG_SETGID) ? S_ISGID : 0) |
1370 ((flags & ICBTAG_FLAG_STICKY) ? S_ISVTX : 0);
1375 int udf_write_inode(struct inode *inode, int sync)
1380 ret = udf_update_inode(inode, sync);
1386 int udf_sync_inode(struct inode *inode)
1388 return udf_update_inode(inode, 1);
1391 static int udf_update_inode(struct inode *inode, int do_sync)
1393 struct buffer_head *bh = NULL;
1394 struct fileEntry *fe;
1395 struct extendedFileEntry *efe;
1400 struct udf_sb_info *sbi = UDF_SB(inode->i_sb);
1401 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits;
1402 struct udf_inode_info *iinfo = UDF_I(inode);
1404 bh = udf_tread(inode->i_sb,
1405 udf_get_lb_pblock(inode->i_sb,
1406 &iinfo->i_location, 0));
1408 udf_debug("bread failure\n");
1412 memset(bh->b_data, 0x00, inode->i_sb->s_blocksize);
1414 fe = (struct fileEntry *)bh->b_data;
1415 efe = (struct extendedFileEntry *)bh->b_data;
1417 if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_USE)) {
1418 struct unallocSpaceEntry *use =
1419 (struct unallocSpaceEntry *)bh->b_data;
1421 use->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc);
1422 memcpy(bh->b_data + sizeof(struct unallocSpaceEntry),
1423 iinfo->i_ext.i_data, inode->i_sb->s_blocksize -
1424 sizeof(struct unallocSpaceEntry));
1425 crclen = sizeof(struct unallocSpaceEntry) +
1426 iinfo->i_lenAlloc - sizeof(struct tag);
1427 use->descTag.tagLocation = cpu_to_le32(
1430 use->descTag.descCRCLength = cpu_to_le16(crclen);
1431 use->descTag.descCRC = cpu_to_le16(crc_itu_t(0, (char *)use +
1434 use->descTag.tagChecksum = udf_tag_checksum(&use->descTag);
1436 mark_buffer_dirty(bh);
1441 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_FORGET))
1442 fe->uid = cpu_to_le32(-1);
1444 fe->uid = cpu_to_le32(inode->i_uid);
1446 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_FORGET))
1447 fe->gid = cpu_to_le32(-1);
1449 fe->gid = cpu_to_le32(inode->i_gid);
1451 udfperms = ((inode->i_mode & S_IRWXO)) |
1452 ((inode->i_mode & S_IRWXG) << 2) |
1453 ((inode->i_mode & S_IRWXU) << 4);
1455 udfperms |= (le32_to_cpu(fe->permissions) &
1456 (FE_PERM_O_DELETE | FE_PERM_O_CHATTR |
1457 FE_PERM_G_DELETE | FE_PERM_G_CHATTR |
1458 FE_PERM_U_DELETE | FE_PERM_U_CHATTR));
1459 fe->permissions = cpu_to_le32(udfperms);
1461 if (S_ISDIR(inode->i_mode))
1462 fe->fileLinkCount = cpu_to_le16(inode->i_nlink - 1);
1464 fe->fileLinkCount = cpu_to_le16(inode->i_nlink);
1466 fe->informationLength = cpu_to_le64(inode->i_size);
1468 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
1470 struct deviceSpec *dsea =
1471 (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1);
1473 dsea = (struct deviceSpec *)
1474 udf_add_extendedattr(inode,
1475 sizeof(struct deviceSpec) +
1476 sizeof(struct regid), 12, 0x3);
1477 dsea->attrType = cpu_to_le32(12);
1478 dsea->attrSubtype = 1;
1479 dsea->attrLength = cpu_to_le32(
1480 sizeof(struct deviceSpec) +
1481 sizeof(struct regid));
1482 dsea->impUseLength = cpu_to_le32(sizeof(struct regid));
1484 eid = (struct regid *)dsea->impUse;
1485 memset(eid, 0, sizeof(struct regid));
1486 strcpy(eid->ident, UDF_ID_DEVELOPER);
1487 eid->identSuffix[0] = UDF_OS_CLASS_UNIX;
1488 eid->identSuffix[1] = UDF_OS_ID_LINUX;
1489 dsea->majorDeviceIdent = cpu_to_le32(imajor(inode));
1490 dsea->minorDeviceIdent = cpu_to_le32(iminor(inode));
1493 if (iinfo->i_efe == 0) {
1494 memcpy(bh->b_data + sizeof(struct fileEntry),
1495 iinfo->i_ext.i_data,
1496 inode->i_sb->s_blocksize - sizeof(struct fileEntry));
1497 fe->logicalBlocksRecorded = cpu_to_le64(
1498 (inode->i_blocks + (1 << (blocksize_bits - 9)) - 1) >>
1499 (blocksize_bits - 9));
1501 udf_time_to_disk_stamp(&fe->accessTime, inode->i_atime);
1502 udf_time_to_disk_stamp(&fe->modificationTime, inode->i_mtime);
1503 udf_time_to_disk_stamp(&fe->attrTime, inode->i_ctime);
1504 memset(&(fe->impIdent), 0, sizeof(struct regid));
1505 strcpy(fe->impIdent.ident, UDF_ID_DEVELOPER);
1506 fe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1507 fe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1508 fe->uniqueID = cpu_to_le64(iinfo->i_unique);
1509 fe->lengthExtendedAttr = cpu_to_le32(iinfo->i_lenEAttr);
1510 fe->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc);
1511 fe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_FE);
1512 crclen = sizeof(struct fileEntry);
1514 memcpy(bh->b_data + sizeof(struct extendedFileEntry),
1515 iinfo->i_ext.i_data,
1516 inode->i_sb->s_blocksize -
1517 sizeof(struct extendedFileEntry));
1518 efe->objectSize = cpu_to_le64(inode->i_size);
1519 efe->logicalBlocksRecorded = cpu_to_le64(
1520 (inode->i_blocks + (1 << (blocksize_bits - 9)) - 1) >>
1521 (blocksize_bits - 9));
1523 if (iinfo->i_crtime.tv_sec > inode->i_atime.tv_sec ||
1524 (iinfo->i_crtime.tv_sec == inode->i_atime.tv_sec &&
1525 iinfo->i_crtime.tv_nsec > inode->i_atime.tv_nsec))
1526 iinfo->i_crtime = inode->i_atime;
1528 if (iinfo->i_crtime.tv_sec > inode->i_mtime.tv_sec ||
1529 (iinfo->i_crtime.tv_sec == inode->i_mtime.tv_sec &&
1530 iinfo->i_crtime.tv_nsec > inode->i_mtime.tv_nsec))
1531 iinfo->i_crtime = inode->i_mtime;
1533 if (iinfo->i_crtime.tv_sec > inode->i_ctime.tv_sec ||
1534 (iinfo->i_crtime.tv_sec == inode->i_ctime.tv_sec &&
1535 iinfo->i_crtime.tv_nsec > inode->i_ctime.tv_nsec))
1536 iinfo->i_crtime = inode->i_ctime;
1538 udf_time_to_disk_stamp(&efe->accessTime, inode->i_atime);
1539 udf_time_to_disk_stamp(&efe->modificationTime, inode->i_mtime);
1540 udf_time_to_disk_stamp(&efe->createTime, iinfo->i_crtime);
1541 udf_time_to_disk_stamp(&efe->attrTime, inode->i_ctime);
1543 memset(&(efe->impIdent), 0, sizeof(struct regid));
1544 strcpy(efe->impIdent.ident, UDF_ID_DEVELOPER);
1545 efe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1546 efe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1547 efe->uniqueID = cpu_to_le64(iinfo->i_unique);
1548 efe->lengthExtendedAttr = cpu_to_le32(iinfo->i_lenEAttr);
1549 efe->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc);
1550 efe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_EFE);
1551 crclen = sizeof(struct extendedFileEntry);
1553 if (iinfo->i_strat4096) {
1554 fe->icbTag.strategyType = cpu_to_le16(4096);
1555 fe->icbTag.strategyParameter = cpu_to_le16(1);
1556 fe->icbTag.numEntries = cpu_to_le16(2);
1558 fe->icbTag.strategyType = cpu_to_le16(4);
1559 fe->icbTag.numEntries = cpu_to_le16(1);
1562 if (S_ISDIR(inode->i_mode))
1563 fe->icbTag.fileType = ICBTAG_FILE_TYPE_DIRECTORY;
1564 else if (S_ISREG(inode->i_mode))
1565 fe->icbTag.fileType = ICBTAG_FILE_TYPE_REGULAR;
1566 else if (S_ISLNK(inode->i_mode))
1567 fe->icbTag.fileType = ICBTAG_FILE_TYPE_SYMLINK;
1568 else if (S_ISBLK(inode->i_mode))
1569 fe->icbTag.fileType = ICBTAG_FILE_TYPE_BLOCK;
1570 else if (S_ISCHR(inode->i_mode))
1571 fe->icbTag.fileType = ICBTAG_FILE_TYPE_CHAR;
1572 else if (S_ISFIFO(inode->i_mode))
1573 fe->icbTag.fileType = ICBTAG_FILE_TYPE_FIFO;
1574 else if (S_ISSOCK(inode->i_mode))
1575 fe->icbTag.fileType = ICBTAG_FILE_TYPE_SOCKET;
1577 icbflags = iinfo->i_alloc_type |
1578 ((inode->i_mode & S_ISUID) ? ICBTAG_FLAG_SETUID : 0) |
1579 ((inode->i_mode & S_ISGID) ? ICBTAG_FLAG_SETGID : 0) |
1580 ((inode->i_mode & S_ISVTX) ? ICBTAG_FLAG_STICKY : 0) |
1581 (le16_to_cpu(fe->icbTag.flags) &
1582 ~(ICBTAG_FLAG_AD_MASK | ICBTAG_FLAG_SETUID |
1583 ICBTAG_FLAG_SETGID | ICBTAG_FLAG_STICKY));
1585 fe->icbTag.flags = cpu_to_le16(icbflags);
1586 if (sbi->s_udfrev >= 0x0200)
1587 fe->descTag.descVersion = cpu_to_le16(3);
1589 fe->descTag.descVersion = cpu_to_le16(2);
1590 fe->descTag.tagSerialNum = cpu_to_le16(sbi->s_serial_number);
1591 fe->descTag.tagLocation = cpu_to_le32(
1592 iinfo->i_location.logicalBlockNum);
1593 crclen += iinfo->i_lenEAttr + iinfo->i_lenAlloc -
1595 fe->descTag.descCRCLength = cpu_to_le16(crclen);
1596 fe->descTag.descCRC = cpu_to_le16(crc_itu_t(0, (char *)fe + sizeof(struct tag),
1598 fe->descTag.tagChecksum = udf_tag_checksum(&fe->descTag);
1600 /* write the data blocks */
1601 mark_buffer_dirty(bh);
1603 sync_dirty_buffer(bh);
1604 if (buffer_req(bh) && !buffer_uptodate(bh)) {
1605 printk(KERN_WARNING "IO error syncing udf inode "
1606 "[%s:%08lx]\n", inode->i_sb->s_id,
1616 struct inode *udf_iget(struct super_block *sb, struct kernel_lb_addr *ino)
1618 unsigned long block = udf_get_lb_pblock(sb, ino, 0);
1619 struct inode *inode = iget_locked(sb, block);
1624 if (inode->i_state & I_NEW) {
1625 memcpy(&UDF_I(inode)->i_location, ino, sizeof(struct kernel_lb_addr));
1626 __udf_read_inode(inode);
1627 unlock_new_inode(inode);
1630 if (is_bad_inode(inode))
1633 if (ino->logicalBlockNum >= UDF_SB(sb)->
1634 s_partmaps[ino->partitionReferenceNum].s_partition_len) {
1635 udf_debug("block=%d, partition=%d out of range\n",
1636 ino->logicalBlockNum, ino->partitionReferenceNum);
1637 make_bad_inode(inode);
1648 int8_t udf_add_aext(struct inode *inode, struct extent_position *epos,
1649 struct kernel_lb_addr *eloc, uint32_t elen, int inc)
1652 struct short_ad *sad = NULL;
1653 struct long_ad *lad = NULL;
1654 struct allocExtDesc *aed;
1657 struct udf_inode_info *iinfo = UDF_I(inode);
1660 ptr = iinfo->i_ext.i_data + epos->offset -
1661 udf_file_entry_alloc_offset(inode) +
1664 ptr = epos->bh->b_data + epos->offset;
1666 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
1667 adsize = sizeof(struct short_ad);
1668 else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
1669 adsize = sizeof(struct long_ad);
1673 if (epos->offset + (2 * adsize) > inode->i_sb->s_blocksize) {
1675 struct buffer_head *nbh;
1677 struct kernel_lb_addr obloc = epos->block;
1679 epos->block.logicalBlockNum = udf_new_block(inode->i_sb, NULL,
1680 obloc.partitionReferenceNum,
1681 obloc.logicalBlockNum, &err);
1682 if (!epos->block.logicalBlockNum)
1684 nbh = udf_tgetblk(inode->i_sb, udf_get_lb_pblock(inode->i_sb,
1690 memset(nbh->b_data, 0x00, inode->i_sb->s_blocksize);
1691 set_buffer_uptodate(nbh);
1693 mark_buffer_dirty_inode(nbh, inode);
1695 aed = (struct allocExtDesc *)(nbh->b_data);
1696 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT))
1697 aed->previousAllocExtLocation =
1698 cpu_to_le32(obloc.logicalBlockNum);
1699 if (epos->offset + adsize > inode->i_sb->s_blocksize) {
1700 loffset = epos->offset;
1701 aed->lengthAllocDescs = cpu_to_le32(adsize);
1702 sptr = ptr - adsize;
1703 dptr = nbh->b_data + sizeof(struct allocExtDesc);
1704 memcpy(dptr, sptr, adsize);
1705 epos->offset = sizeof(struct allocExtDesc) + adsize;
1707 loffset = epos->offset + adsize;
1708 aed->lengthAllocDescs = cpu_to_le32(0);
1710 epos->offset = sizeof(struct allocExtDesc);
1713 aed = (struct allocExtDesc *)epos->bh->b_data;
1714 le32_add_cpu(&aed->lengthAllocDescs, adsize);
1716 iinfo->i_lenAlloc += adsize;
1717 mark_inode_dirty(inode);
1720 if (UDF_SB(inode->i_sb)->s_udfrev >= 0x0200)
1721 udf_new_tag(nbh->b_data, TAG_IDENT_AED, 3, 1,
1722 epos->block.logicalBlockNum, sizeof(struct tag));
1724 udf_new_tag(nbh->b_data, TAG_IDENT_AED, 2, 1,
1725 epos->block.logicalBlockNum, sizeof(struct tag));
1726 switch (iinfo->i_alloc_type) {
1727 case ICBTAG_FLAG_AD_SHORT:
1728 sad = (struct short_ad *)sptr;
1729 sad->extLength = cpu_to_le32(EXT_NEXT_EXTENT_ALLOCDECS |
1730 inode->i_sb->s_blocksize);
1732 cpu_to_le32(epos->block.logicalBlockNum);
1734 case ICBTAG_FLAG_AD_LONG:
1735 lad = (struct long_ad *)sptr;
1736 lad->extLength = cpu_to_le32(EXT_NEXT_EXTENT_ALLOCDECS |
1737 inode->i_sb->s_blocksize);
1738 lad->extLocation = cpu_to_lelb(epos->block);
1739 memset(lad->impUse, 0x00, sizeof(lad->impUse));
1743 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
1744 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201)
1745 udf_update_tag(epos->bh->b_data, loffset);
1747 udf_update_tag(epos->bh->b_data,
1748 sizeof(struct allocExtDesc));
1749 mark_buffer_dirty_inode(epos->bh, inode);
1752 mark_inode_dirty(inode);
1757 etype = udf_write_aext(inode, epos, eloc, elen, inc);
1760 iinfo->i_lenAlloc += adsize;
1761 mark_inode_dirty(inode);
1763 aed = (struct allocExtDesc *)epos->bh->b_data;
1764 le32_add_cpu(&aed->lengthAllocDescs, adsize);
1765 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
1766 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201)
1767 udf_update_tag(epos->bh->b_data,
1768 epos->offset + (inc ? 0 : adsize));
1770 udf_update_tag(epos->bh->b_data,
1771 sizeof(struct allocExtDesc));
1772 mark_buffer_dirty_inode(epos->bh, inode);
1778 int8_t udf_write_aext(struct inode *inode, struct extent_position *epos,
1779 struct kernel_lb_addr *eloc, uint32_t elen, int inc)
1783 struct short_ad *sad;
1784 struct long_ad *lad;
1785 struct udf_inode_info *iinfo = UDF_I(inode);
1788 ptr = iinfo->i_ext.i_data + epos->offset -
1789 udf_file_entry_alloc_offset(inode) +
1792 ptr = epos->bh->b_data + epos->offset;
1794 switch (iinfo->i_alloc_type) {
1795 case ICBTAG_FLAG_AD_SHORT:
1796 sad = (struct short_ad *)ptr;
1797 sad->extLength = cpu_to_le32(elen);
1798 sad->extPosition = cpu_to_le32(eloc->logicalBlockNum);
1799 adsize = sizeof(struct short_ad);
1801 case ICBTAG_FLAG_AD_LONG:
1802 lad = (struct long_ad *)ptr;
1803 lad->extLength = cpu_to_le32(elen);
1804 lad->extLocation = cpu_to_lelb(*eloc);
1805 memset(lad->impUse, 0x00, sizeof(lad->impUse));
1806 adsize = sizeof(struct long_ad);
1813 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
1814 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) {
1815 struct allocExtDesc *aed =
1816 (struct allocExtDesc *)epos->bh->b_data;
1817 udf_update_tag(epos->bh->b_data,
1818 le32_to_cpu(aed->lengthAllocDescs) +
1819 sizeof(struct allocExtDesc));
1821 mark_buffer_dirty_inode(epos->bh, inode);
1823 mark_inode_dirty(inode);
1827 epos->offset += adsize;
1829 return (elen >> 30);
1832 int8_t udf_next_aext(struct inode *inode, struct extent_position *epos,
1833 struct kernel_lb_addr *eloc, uint32_t *elen, int inc)
1837 while ((etype = udf_current_aext(inode, epos, eloc, elen, inc)) ==
1838 (EXT_NEXT_EXTENT_ALLOCDECS >> 30)) {
1840 epos->block = *eloc;
1841 epos->offset = sizeof(struct allocExtDesc);
1843 block = udf_get_lb_pblock(inode->i_sb, &epos->block, 0);
1844 epos->bh = udf_tread(inode->i_sb, block);
1846 udf_debug("reading block %d failed!\n", block);
1854 int8_t udf_current_aext(struct inode *inode, struct extent_position *epos,
1855 struct kernel_lb_addr *eloc, uint32_t *elen, int inc)
1860 struct short_ad *sad;
1861 struct long_ad *lad;
1862 struct udf_inode_info *iinfo = UDF_I(inode);
1866 epos->offset = udf_file_entry_alloc_offset(inode);
1867 ptr = iinfo->i_ext.i_data + epos->offset -
1868 udf_file_entry_alloc_offset(inode) +
1870 alen = udf_file_entry_alloc_offset(inode) +
1874 epos->offset = sizeof(struct allocExtDesc);
1875 ptr = epos->bh->b_data + epos->offset;
1876 alen = sizeof(struct allocExtDesc) +
1877 le32_to_cpu(((struct allocExtDesc *)epos->bh->b_data)->
1881 switch (iinfo->i_alloc_type) {
1882 case ICBTAG_FLAG_AD_SHORT:
1883 sad = udf_get_fileshortad(ptr, alen, &epos->offset, inc);
1886 etype = le32_to_cpu(sad->extLength) >> 30;
1887 eloc->logicalBlockNum = le32_to_cpu(sad->extPosition);
1888 eloc->partitionReferenceNum =
1889 iinfo->i_location.partitionReferenceNum;
1890 *elen = le32_to_cpu(sad->extLength) & UDF_EXTENT_LENGTH_MASK;
1892 case ICBTAG_FLAG_AD_LONG:
1893 lad = udf_get_filelongad(ptr, alen, &epos->offset, inc);
1896 etype = le32_to_cpu(lad->extLength) >> 30;
1897 *eloc = lelb_to_cpu(lad->extLocation);
1898 *elen = le32_to_cpu(lad->extLength) & UDF_EXTENT_LENGTH_MASK;
1901 udf_debug("alloc_type = %d unsupported\n",
1902 iinfo->i_alloc_type);
1909 static int8_t udf_insert_aext(struct inode *inode, struct extent_position epos,
1910 struct kernel_lb_addr neloc, uint32_t nelen)
1912 struct kernel_lb_addr oeloc;
1919 while ((etype = udf_next_aext(inode, &epos, &oeloc, &oelen, 0)) != -1) {
1920 udf_write_aext(inode, &epos, &neloc, nelen, 1);
1922 nelen = (etype << 30) | oelen;
1924 udf_add_aext(inode, &epos, &neloc, nelen, 1);
1927 return (nelen >> 30);
1930 int8_t udf_delete_aext(struct inode *inode, struct extent_position epos,
1931 struct kernel_lb_addr eloc, uint32_t elen)
1933 struct extent_position oepos;
1936 struct allocExtDesc *aed;
1937 struct udf_inode_info *iinfo;
1944 iinfo = UDF_I(inode);
1945 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
1946 adsize = sizeof(struct short_ad);
1947 else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
1948 adsize = sizeof(struct long_ad);
1953 if (udf_next_aext(inode, &epos, &eloc, &elen, 1) == -1)
1956 while ((etype = udf_next_aext(inode, &epos, &eloc, &elen, 1)) != -1) {
1957 udf_write_aext(inode, &oepos, &eloc, (etype << 30) | elen, 1);
1958 if (oepos.bh != epos.bh) {
1959 oepos.block = epos.block;
1963 oepos.offset = epos.offset - adsize;
1966 memset(&eloc, 0x00, sizeof(struct kernel_lb_addr));
1969 if (epos.bh != oepos.bh) {
1970 udf_free_blocks(inode->i_sb, inode, &epos.block, 0, 1);
1971 udf_write_aext(inode, &oepos, &eloc, elen, 1);
1972 udf_write_aext(inode, &oepos, &eloc, elen, 1);
1974 iinfo->i_lenAlloc -= (adsize * 2);
1975 mark_inode_dirty(inode);
1977 aed = (struct allocExtDesc *)oepos.bh->b_data;
1978 le32_add_cpu(&aed->lengthAllocDescs, -(2 * adsize));
1979 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
1980 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201)
1981 udf_update_tag(oepos.bh->b_data,
1982 oepos.offset - (2 * adsize));
1984 udf_update_tag(oepos.bh->b_data,
1985 sizeof(struct allocExtDesc));
1986 mark_buffer_dirty_inode(oepos.bh, inode);
1989 udf_write_aext(inode, &oepos, &eloc, elen, 1);
1991 iinfo->i_lenAlloc -= adsize;
1992 mark_inode_dirty(inode);
1994 aed = (struct allocExtDesc *)oepos.bh->b_data;
1995 le32_add_cpu(&aed->lengthAllocDescs, -adsize);
1996 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
1997 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201)
1998 udf_update_tag(oepos.bh->b_data,
1999 epos.offset - adsize);
2001 udf_update_tag(oepos.bh->b_data,
2002 sizeof(struct allocExtDesc));
2003 mark_buffer_dirty_inode(oepos.bh, inode);
2010 return (elen >> 30);
2013 int8_t inode_bmap(struct inode *inode, sector_t block,
2014 struct extent_position *pos, struct kernel_lb_addr *eloc,
2015 uint32_t *elen, sector_t *offset)
2017 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits;
2018 loff_t lbcount = 0, bcount =
2019 (loff_t) block << blocksize_bits;
2021 struct udf_inode_info *iinfo;
2023 iinfo = UDF_I(inode);
2025 pos->block = iinfo->i_location;
2030 etype = udf_next_aext(inode, pos, eloc, elen, 1);
2032 *offset = (bcount - lbcount) >> blocksize_bits;
2033 iinfo->i_lenExtents = lbcount;
2037 } while (lbcount <= bcount);
2039 *offset = (bcount + *elen - lbcount) >> blocksize_bits;
2044 long udf_block_map(struct inode *inode, sector_t block)
2046 struct kernel_lb_addr eloc;
2049 struct extent_position epos = {};
2054 if (inode_bmap(inode, block, &epos, &eloc, &elen, &offset) ==
2055 (EXT_RECORDED_ALLOCATED >> 30))
2056 ret = udf_get_lb_pblock(inode->i_sb, &eloc, offset);
2063 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_VARCONV))
2064 return udf_fixed_to_variable(ret);