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>
44 MODULE_AUTHOR("Ben Fennema");
45 MODULE_DESCRIPTION("Universal Disk Format Filesystem");
46 MODULE_LICENSE("GPL");
48 #define EXTENT_MERGE_SIZE 5
50 static mode_t udf_convert_permissions(struct fileEntry *);
51 static int udf_update_inode(struct inode *, int);
52 static void udf_fill_inode(struct inode *, struct buffer_head *);
53 static int udf_alloc_i_data(struct inode *inode, size_t size);
54 static struct buffer_head *inode_getblk(struct inode *, sector_t, int *,
56 static int8_t udf_insert_aext(struct inode *, struct extent_position,
57 kernel_lb_addr, uint32_t);
58 static void udf_split_extents(struct inode *, int *, int, int,
59 kernel_long_ad[EXTENT_MERGE_SIZE], int *);
60 static void udf_prealloc_extents(struct inode *, int, int,
61 kernel_long_ad[EXTENT_MERGE_SIZE], int *);
62 static void udf_merge_extents(struct inode *,
63 kernel_long_ad[EXTENT_MERGE_SIZE], int *);
64 static void udf_update_extents(struct inode *,
65 kernel_long_ad[EXTENT_MERGE_SIZE], int, int,
66 struct extent_position *);
67 static int udf_get_block(struct inode *, sector_t, struct buffer_head *, int);
70 void udf_delete_inode(struct inode *inode)
72 truncate_inode_pages(&inode->i_data, 0);
74 if (is_bad_inode(inode))
81 udf_update_inode(inode, IS_SYNC(inode));
82 udf_free_inode(inode);
92 * If we are going to release inode from memory, we discard preallocation and
93 * truncate last inode extent to proper length. We could use drop_inode() but
94 * it's called under inode_lock and thus we cannot mark inode dirty there. We
95 * use clear_inode() but we have to make sure to write inode as it's not written
98 void udf_clear_inode(struct inode *inode)
100 struct udf_inode_info *iinfo;
101 if (!(inode->i_sb->s_flags & MS_RDONLY)) {
103 /* Discard preallocation for directories, symlinks, etc. */
104 udf_discard_prealloc(inode);
105 udf_truncate_tail_extent(inode);
107 write_inode_now(inode, 0);
109 iinfo = UDF_I(inode);
110 kfree(iinfo->i_ext.i_data);
111 iinfo->i_ext.i_data = NULL;
114 static int udf_writepage(struct page *page, struct writeback_control *wbc)
116 return block_write_full_page(page, udf_get_block, wbc);
119 static int udf_readpage(struct file *file, struct page *page)
121 return block_read_full_page(page, udf_get_block);
124 static int udf_write_begin(struct file *file, struct address_space *mapping,
125 loff_t pos, unsigned len, unsigned flags,
126 struct page **pagep, void **fsdata)
129 return block_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
133 static sector_t udf_bmap(struct address_space *mapping, sector_t block)
135 return generic_block_bmap(mapping, block, udf_get_block);
138 const struct address_space_operations udf_aops = {
139 .readpage = udf_readpage,
140 .writepage = udf_writepage,
141 .sync_page = block_sync_page,
142 .write_begin = udf_write_begin,
143 .write_end = generic_write_end,
147 void udf_expand_file_adinicb(struct inode *inode, int newsize, int *err)
151 struct udf_inode_info *iinfo = UDF_I(inode);
152 struct writeback_control udf_wbc = {
153 .sync_mode = WB_SYNC_NONE,
157 /* from now on we have normal address_space methods */
158 inode->i_data.a_ops = &udf_aops;
160 if (!iinfo->i_lenAlloc) {
161 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))
162 iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT;
164 iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG;
165 mark_inode_dirty(inode);
169 page = grab_cache_page(inode->i_mapping, 0);
170 BUG_ON(!PageLocked(page));
172 if (!PageUptodate(page)) {
174 memset(kaddr + iinfo->i_lenAlloc, 0x00,
175 PAGE_CACHE_SIZE - iinfo->i_lenAlloc);
176 memcpy(kaddr, iinfo->i_ext.i_data + iinfo->i_lenEAttr,
178 flush_dcache_page(page);
179 SetPageUptodate(page);
182 memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr, 0x00,
184 iinfo->i_lenAlloc = 0;
185 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))
186 iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT;
188 iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG;
190 inode->i_data.a_ops->writepage(page, &udf_wbc);
191 page_cache_release(page);
193 mark_inode_dirty(inode);
196 struct buffer_head *udf_expand_dir_adinicb(struct inode *inode, int *block,
200 struct buffer_head *dbh = NULL;
204 struct extent_position epos;
206 struct udf_fileident_bh sfibh, dfibh;
207 loff_t f_pos = udf_ext0_offset(inode);
208 int size = udf_ext0_offset(inode) + inode->i_size;
209 struct fileIdentDesc cfi, *sfi, *dfi;
210 struct udf_inode_info *iinfo = UDF_I(inode);
212 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))
213 alloctype = ICBTAG_FLAG_AD_SHORT;
215 alloctype = ICBTAG_FLAG_AD_LONG;
217 if (!inode->i_size) {
218 iinfo->i_alloc_type = alloctype;
219 mark_inode_dirty(inode);
223 /* alloc block, and copy data to it */
224 *block = udf_new_block(inode->i_sb, inode,
225 iinfo->i_location.partitionReferenceNum,
226 iinfo->i_location.logicalBlockNum, err);
229 newblock = udf_get_pblock(inode->i_sb, *block,
230 iinfo->i_location.partitionReferenceNum,
234 dbh = udf_tgetblk(inode->i_sb, newblock);
238 memset(dbh->b_data, 0x00, inode->i_sb->s_blocksize);
239 set_buffer_uptodate(dbh);
241 mark_buffer_dirty_inode(dbh, inode);
243 sfibh.soffset = sfibh.eoffset =
244 f_pos & (inode->i_sb->s_blocksize - 1);
245 sfibh.sbh = sfibh.ebh = NULL;
246 dfibh.soffset = dfibh.eoffset = 0;
247 dfibh.sbh = dfibh.ebh = dbh;
248 while (f_pos < size) {
249 iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB;
250 sfi = udf_fileident_read(inode, &f_pos, &sfibh, &cfi, NULL,
256 iinfo->i_alloc_type = alloctype;
257 sfi->descTag.tagLocation = cpu_to_le32(*block);
258 dfibh.soffset = dfibh.eoffset;
259 dfibh.eoffset += (sfibh.eoffset - sfibh.soffset);
260 dfi = (struct fileIdentDesc *)(dbh->b_data + dfibh.soffset);
261 if (udf_write_fi(inode, sfi, dfi, &dfibh, sfi->impUse,
263 le16_to_cpu(sfi->lengthOfImpUse))) {
264 iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB;
269 mark_buffer_dirty_inode(dbh, inode);
271 memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr, 0,
273 iinfo->i_lenAlloc = 0;
274 eloc.logicalBlockNum = *block;
275 eloc.partitionReferenceNum =
276 iinfo->i_location.partitionReferenceNum;
277 elen = inode->i_sb->s_blocksize;
278 iinfo->i_lenExtents = elen;
280 epos.block = iinfo->i_location;
281 epos.offset = udf_file_entry_alloc_offset(inode);
282 udf_add_aext(inode, &epos, eloc, elen, 0);
286 mark_inode_dirty(inode);
290 static int udf_get_block(struct inode *inode, sector_t block,
291 struct buffer_head *bh_result, int create)
294 struct buffer_head *bh;
296 struct udf_inode_info *iinfo;
299 phys = udf_block_map(inode, block);
301 map_bh(bh_result, inode->i_sb, phys);
311 iinfo = UDF_I(inode);
312 if (block == iinfo->i_next_alloc_block + 1) {
313 iinfo->i_next_alloc_block++;
314 iinfo->i_next_alloc_goal++;
319 bh = inode_getblk(inode, block, &err, &phys, &new);
326 set_buffer_new(bh_result);
327 map_bh(bh_result, inode->i_sb, phys);
334 static struct buffer_head *udf_getblk(struct inode *inode, long block,
335 int create, int *err)
337 struct buffer_head *bh;
338 struct buffer_head dummy;
341 dummy.b_blocknr = -1000;
342 *err = udf_get_block(inode, block, &dummy, create);
343 if (!*err && buffer_mapped(&dummy)) {
344 bh = sb_getblk(inode->i_sb, dummy.b_blocknr);
345 if (buffer_new(&dummy)) {
347 memset(bh->b_data, 0x00, inode->i_sb->s_blocksize);
348 set_buffer_uptodate(bh);
350 mark_buffer_dirty_inode(bh, inode);
358 /* Extend the file by 'blocks' blocks, return the number of extents added */
359 int udf_extend_file(struct inode *inode, struct extent_position *last_pos,
360 kernel_long_ad *last_ext, sector_t blocks)
363 int count = 0, fake = !(last_ext->extLength & UDF_EXTENT_LENGTH_MASK);
364 struct super_block *sb = inode->i_sb;
365 kernel_lb_addr prealloc_loc = {};
366 int prealloc_len = 0;
367 struct udf_inode_info *iinfo;
369 /* The previous extent is fake and we should not extend by anything
370 * - there's nothing to do... */
374 iinfo = UDF_I(inode);
375 /* Round the last extent up to a multiple of block size */
376 if (last_ext->extLength & (sb->s_blocksize - 1)) {
377 last_ext->extLength =
378 (last_ext->extLength & UDF_EXTENT_FLAG_MASK) |
379 (((last_ext->extLength & UDF_EXTENT_LENGTH_MASK) +
380 sb->s_blocksize - 1) & ~(sb->s_blocksize - 1));
381 iinfo->i_lenExtents =
382 (iinfo->i_lenExtents + sb->s_blocksize - 1) &
383 ~(sb->s_blocksize - 1);
386 /* Last extent are just preallocated blocks? */
387 if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) ==
388 EXT_NOT_RECORDED_ALLOCATED) {
389 /* Save the extent so that we can reattach it to the end */
390 prealloc_loc = last_ext->extLocation;
391 prealloc_len = last_ext->extLength;
392 /* Mark the extent as a hole */
393 last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED |
394 (last_ext->extLength & UDF_EXTENT_LENGTH_MASK);
395 last_ext->extLocation.logicalBlockNum = 0;
396 last_ext->extLocation.partitionReferenceNum = 0;
399 /* Can we merge with the previous extent? */
400 if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) ==
401 EXT_NOT_RECORDED_NOT_ALLOCATED) {
402 add = ((1 << 30) - sb->s_blocksize -
403 (last_ext->extLength & UDF_EXTENT_LENGTH_MASK)) >>
404 sb->s_blocksize_bits;
408 last_ext->extLength += add << sb->s_blocksize_bits;
412 udf_add_aext(inode, last_pos, last_ext->extLocation,
413 last_ext->extLength, 1);
416 udf_write_aext(inode, last_pos, last_ext->extLocation,
417 last_ext->extLength, 1);
419 /* Managed to do everything necessary? */
423 /* All further extents will be NOT_RECORDED_NOT_ALLOCATED */
424 last_ext->extLocation.logicalBlockNum = 0;
425 last_ext->extLocation.partitionReferenceNum = 0;
426 add = (1 << (30-sb->s_blocksize_bits)) - 1;
427 last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED |
428 (add << sb->s_blocksize_bits);
430 /* Create enough extents to cover the whole hole */
431 while (blocks > add) {
433 if (udf_add_aext(inode, last_pos, last_ext->extLocation,
434 last_ext->extLength, 1) == -1)
439 last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED |
440 (blocks << sb->s_blocksize_bits);
441 if (udf_add_aext(inode, last_pos, last_ext->extLocation,
442 last_ext->extLength, 1) == -1)
448 /* Do we have some preallocated blocks saved? */
450 if (udf_add_aext(inode, last_pos, prealloc_loc,
451 prealloc_len, 1) == -1)
453 last_ext->extLocation = prealloc_loc;
454 last_ext->extLength = prealloc_len;
458 /* last_pos should point to the last written extent... */
459 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
460 last_pos->offset -= sizeof(short_ad);
461 else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
462 last_pos->offset -= sizeof(long_ad);
469 static struct buffer_head *inode_getblk(struct inode *inode, sector_t block,
470 int *err, sector_t *phys, int *new)
472 static sector_t last_block;
473 struct buffer_head *result = NULL;
474 kernel_long_ad laarr[EXTENT_MERGE_SIZE];
475 struct extent_position prev_epos, cur_epos, next_epos;
476 int count = 0, startnum = 0, endnum = 0;
477 uint32_t elen = 0, tmpelen;
478 kernel_lb_addr eloc, tmpeloc;
480 loff_t lbcount = 0, b_off = 0;
481 uint32_t newblocknum, newblock;
484 struct udf_inode_info *iinfo = UDF_I(inode);
485 int goal = 0, pgoal = iinfo->i_location.logicalBlockNum;
488 prev_epos.offset = udf_file_entry_alloc_offset(inode);
489 prev_epos.block = iinfo->i_location;
491 cur_epos = next_epos = prev_epos;
492 b_off = (loff_t)block << inode->i_sb->s_blocksize_bits;
494 /* find the extent which contains the block we are looking for.
495 alternate between laarr[0] and laarr[1] for locations of the
496 current extent, and the previous extent */
498 if (prev_epos.bh != cur_epos.bh) {
499 brelse(prev_epos.bh);
501 prev_epos.bh = cur_epos.bh;
503 if (cur_epos.bh != next_epos.bh) {
505 get_bh(next_epos.bh);
506 cur_epos.bh = next_epos.bh;
511 prev_epos.block = cur_epos.block;
512 cur_epos.block = next_epos.block;
514 prev_epos.offset = cur_epos.offset;
515 cur_epos.offset = next_epos.offset;
517 etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 1);
523 laarr[c].extLength = (etype << 30) | elen;
524 laarr[c].extLocation = eloc;
526 if (etype != (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))
527 pgoal = eloc.logicalBlockNum +
528 ((elen + inode->i_sb->s_blocksize - 1) >>
529 inode->i_sb->s_blocksize_bits);
532 } while (lbcount + elen <= b_off);
535 offset = b_off >> inode->i_sb->s_blocksize_bits;
537 * Move prev_epos and cur_epos into indirect extent if we are at
540 udf_next_aext(inode, &prev_epos, &tmpeloc, &tmpelen, 0);
541 udf_next_aext(inode, &cur_epos, &tmpeloc, &tmpelen, 0);
543 /* if the extent is allocated and recorded, return the block
544 if the extent is not a multiple of the blocksize, round up */
546 if (etype == (EXT_RECORDED_ALLOCATED >> 30)) {
547 if (elen & (inode->i_sb->s_blocksize - 1)) {
548 elen = EXT_RECORDED_ALLOCATED |
549 ((elen + inode->i_sb->s_blocksize - 1) &
550 ~(inode->i_sb->s_blocksize - 1));
551 etype = udf_write_aext(inode, &cur_epos, eloc, elen, 1);
553 brelse(prev_epos.bh);
555 brelse(next_epos.bh);
556 newblock = udf_get_lb_pblock(inode->i_sb, eloc, offset);
562 /* Are we beyond EOF? */
571 /* Create a fake extent when there's not one */
572 memset(&laarr[0].extLocation, 0x00,
573 sizeof(kernel_lb_addr));
574 laarr[0].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED;
575 /* Will udf_extend_file() create real extent from
577 startnum = (offset > 0);
579 /* Create extents for the hole between EOF and offset */
580 ret = udf_extend_file(inode, &prev_epos, laarr, offset);
582 brelse(prev_epos.bh);
584 brelse(next_epos.bh);
585 /* We don't really know the error here so we just make
593 /* We are not covered by a preallocated extent? */
594 if ((laarr[0].extLength & UDF_EXTENT_FLAG_MASK) !=
595 EXT_NOT_RECORDED_ALLOCATED) {
596 /* Is there any real extent? - otherwise we overwrite
600 laarr[c].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED |
601 inode->i_sb->s_blocksize;
602 memset(&laarr[c].extLocation, 0x00,
603 sizeof(kernel_lb_addr));
610 endnum = startnum = ((count > 2) ? 2 : count);
612 /* if the current extent is in position 0,
613 swap it with the previous */
614 if (!c && count != 1) {
621 /* if the current block is located in an extent,
622 read the next extent */
623 etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 0);
625 laarr[c + 1].extLength = (etype << 30) | elen;
626 laarr[c + 1].extLocation = eloc;
634 /* if the current extent is not recorded but allocated, get the
635 * block in the extent corresponding to the requested block */
636 if ((laarr[c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30))
637 newblocknum = laarr[c].extLocation.logicalBlockNum + offset;
638 else { /* otherwise, allocate a new block */
639 if (iinfo->i_next_alloc_block == block)
640 goal = iinfo->i_next_alloc_goal;
643 if (!(goal = pgoal)) /* XXX: what was intended here? */
644 goal = iinfo->i_location.logicalBlockNum + 1;
647 newblocknum = udf_new_block(inode->i_sb, inode,
648 iinfo->i_location.partitionReferenceNum,
651 brelse(prev_epos.bh);
655 iinfo->i_lenExtents += inode->i_sb->s_blocksize;
658 /* if the extent the requsted block is located in contains multiple
659 * blocks, split the extent into at most three extents. blocks prior
660 * to requested block, requested block, and blocks after requested
662 udf_split_extents(inode, &c, offset, newblocknum, laarr, &endnum);
664 #ifdef UDF_PREALLOCATE
665 /* preallocate blocks */
666 udf_prealloc_extents(inode, c, lastblock, laarr, &endnum);
669 /* merge any continuous blocks in laarr */
670 udf_merge_extents(inode, laarr, &endnum);
672 /* write back the new extents, inserting new extents if the new number
673 * of extents is greater than the old number, and deleting extents if
674 * the new number of extents is less than the old number */
675 udf_update_extents(inode, laarr, startnum, endnum, &prev_epos);
677 brelse(prev_epos.bh);
679 newblock = udf_get_pblock(inode->i_sb, newblocknum,
680 iinfo->i_location.partitionReferenceNum, 0);
686 iinfo->i_next_alloc_block = block;
687 iinfo->i_next_alloc_goal = newblocknum;
688 inode->i_ctime = current_fs_time(inode->i_sb);
691 udf_sync_inode(inode);
693 mark_inode_dirty(inode);
698 static void udf_split_extents(struct inode *inode, int *c, int offset,
700 kernel_long_ad laarr[EXTENT_MERGE_SIZE],
703 unsigned long blocksize = inode->i_sb->s_blocksize;
704 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits;
706 if ((laarr[*c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30) ||
707 (laarr[*c].extLength >> 30) ==
708 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) {
710 int blen = ((laarr[curr].extLength & UDF_EXTENT_LENGTH_MASK) +
711 blocksize - 1) >> blocksize_bits;
712 int8_t etype = (laarr[curr].extLength >> 30);
716 else if (!offset || blen == offset + 1) {
717 laarr[curr + 2] = laarr[curr + 1];
718 laarr[curr + 1] = laarr[curr];
720 laarr[curr + 3] = laarr[curr + 1];
721 laarr[curr + 2] = laarr[curr + 1] = laarr[curr];
725 if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30)) {
726 udf_free_blocks(inode->i_sb, inode,
727 laarr[curr].extLocation,
729 laarr[curr].extLength =
730 EXT_NOT_RECORDED_NOT_ALLOCATED |
731 (offset << blocksize_bits);
732 laarr[curr].extLocation.logicalBlockNum = 0;
733 laarr[curr].extLocation.
734 partitionReferenceNum = 0;
736 laarr[curr].extLength = (etype << 30) |
737 (offset << blocksize_bits);
743 laarr[curr].extLocation.logicalBlockNum = newblocknum;
744 if (etype == (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))
745 laarr[curr].extLocation.partitionReferenceNum =
746 UDF_I(inode)->i_location.partitionReferenceNum;
747 laarr[curr].extLength = EXT_RECORDED_ALLOCATED |
751 if (blen != offset + 1) {
752 if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30))
753 laarr[curr].extLocation.logicalBlockNum +=
755 laarr[curr].extLength = (etype << 30) |
756 ((blen - (offset + 1)) << blocksize_bits);
763 static void udf_prealloc_extents(struct inode *inode, int c, int lastblock,
764 kernel_long_ad laarr[EXTENT_MERGE_SIZE],
767 int start, length = 0, currlength = 0, i;
769 if (*endnum >= (c + 1)) {
775 if ((laarr[c + 1].extLength >> 30) ==
776 (EXT_NOT_RECORDED_ALLOCATED >> 30)) {
778 length = currlength =
779 (((laarr[c + 1].extLength &
780 UDF_EXTENT_LENGTH_MASK) +
781 inode->i_sb->s_blocksize - 1) >>
782 inode->i_sb->s_blocksize_bits);
787 for (i = start + 1; i <= *endnum; i++) {
790 length += UDF_DEFAULT_PREALLOC_BLOCKS;
791 } else if ((laarr[i].extLength >> 30) ==
792 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) {
793 length += (((laarr[i].extLength &
794 UDF_EXTENT_LENGTH_MASK) +
795 inode->i_sb->s_blocksize - 1) >>
796 inode->i_sb->s_blocksize_bits);
802 int next = laarr[start].extLocation.logicalBlockNum +
803 (((laarr[start].extLength & UDF_EXTENT_LENGTH_MASK) +
804 inode->i_sb->s_blocksize - 1) >>
805 inode->i_sb->s_blocksize_bits);
806 int numalloc = udf_prealloc_blocks(inode->i_sb, inode,
807 laarr[start].extLocation.partitionReferenceNum,
808 next, (UDF_DEFAULT_PREALLOC_BLOCKS > length ?
809 length : UDF_DEFAULT_PREALLOC_BLOCKS) -
812 if (start == (c + 1))
813 laarr[start].extLength +=
815 inode->i_sb->s_blocksize_bits);
817 memmove(&laarr[c + 2], &laarr[c + 1],
818 sizeof(long_ad) * (*endnum - (c + 1)));
820 laarr[c + 1].extLocation.logicalBlockNum = next;
821 laarr[c + 1].extLocation.partitionReferenceNum =
822 laarr[c].extLocation.
823 partitionReferenceNum;
824 laarr[c + 1].extLength =
825 EXT_NOT_RECORDED_ALLOCATED |
827 inode->i_sb->s_blocksize_bits);
831 for (i = start + 1; numalloc && i < *endnum; i++) {
832 int elen = ((laarr[i].extLength &
833 UDF_EXTENT_LENGTH_MASK) +
834 inode->i_sb->s_blocksize - 1) >>
835 inode->i_sb->s_blocksize_bits;
837 if (elen > numalloc) {
838 laarr[i].extLength -=
840 inode->i_sb->s_blocksize_bits);
844 if (*endnum > (i + 1))
848 (*endnum - (i + 1)));
853 UDF_I(inode)->i_lenExtents +=
854 numalloc << inode->i_sb->s_blocksize_bits;
859 static void udf_merge_extents(struct inode *inode,
860 kernel_long_ad laarr[EXTENT_MERGE_SIZE],
864 unsigned long blocksize = inode->i_sb->s_blocksize;
865 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits;
867 for (i = 0; i < (*endnum - 1); i++) {
868 kernel_long_ad *li /*l[i]*/ = &laarr[i];
869 kernel_long_ad *lip1 /*l[i plus 1]*/ = &laarr[i + 1];
871 if (((li->extLength >> 30) == (lip1->extLength >> 30)) &&
872 (((li->extLength >> 30) ==
873 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) ||
874 ((lip1->extLocation.logicalBlockNum -
875 li->extLocation.logicalBlockNum) ==
876 (((li->extLength & UDF_EXTENT_LENGTH_MASK) +
877 blocksize - 1) >> blocksize_bits)))) {
879 if (((li->extLength & UDF_EXTENT_LENGTH_MASK) +
880 (lip1->extLength & UDF_EXTENT_LENGTH_MASK) +
881 blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) {
882 lip1->extLength = (lip1->extLength -
884 UDF_EXTENT_LENGTH_MASK) +
885 UDF_EXTENT_LENGTH_MASK) &
887 li->extLength = (li->extLength &
888 UDF_EXTENT_FLAG_MASK) +
889 (UDF_EXTENT_LENGTH_MASK + 1) -
891 lip1->extLocation.logicalBlockNum =
892 li->extLocation.logicalBlockNum +
894 UDF_EXTENT_LENGTH_MASK) >>
897 li->extLength = lip1->extLength +
899 UDF_EXTENT_LENGTH_MASK) +
900 blocksize - 1) & ~(blocksize - 1));
901 if (*endnum > (i + 2))
902 memmove(&laarr[i + 1], &laarr[i + 2],
904 (*endnum - (i + 2)));
908 } else if (((li->extLength >> 30) ==
909 (EXT_NOT_RECORDED_ALLOCATED >> 30)) &&
910 ((lip1->extLength >> 30) ==
911 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))) {
912 udf_free_blocks(inode->i_sb, inode, li->extLocation, 0,
914 UDF_EXTENT_LENGTH_MASK) +
915 blocksize - 1) >> blocksize_bits);
916 li->extLocation.logicalBlockNum = 0;
917 li->extLocation.partitionReferenceNum = 0;
919 if (((li->extLength & UDF_EXTENT_LENGTH_MASK) +
920 (lip1->extLength & UDF_EXTENT_LENGTH_MASK) +
921 blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) {
922 lip1->extLength = (lip1->extLength -
924 UDF_EXTENT_LENGTH_MASK) +
925 UDF_EXTENT_LENGTH_MASK) &
927 li->extLength = (li->extLength &
928 UDF_EXTENT_FLAG_MASK) +
929 (UDF_EXTENT_LENGTH_MASK + 1) -
932 li->extLength = lip1->extLength +
934 UDF_EXTENT_LENGTH_MASK) +
935 blocksize - 1) & ~(blocksize - 1));
936 if (*endnum > (i + 2))
937 memmove(&laarr[i + 1], &laarr[i + 2],
939 (*endnum - (i + 2)));
943 } else if ((li->extLength >> 30) ==
944 (EXT_NOT_RECORDED_ALLOCATED >> 30)) {
945 udf_free_blocks(inode->i_sb, inode,
948 UDF_EXTENT_LENGTH_MASK) +
949 blocksize - 1) >> blocksize_bits);
950 li->extLocation.logicalBlockNum = 0;
951 li->extLocation.partitionReferenceNum = 0;
952 li->extLength = (li->extLength &
953 UDF_EXTENT_LENGTH_MASK) |
954 EXT_NOT_RECORDED_NOT_ALLOCATED;
959 static void udf_update_extents(struct inode *inode,
960 kernel_long_ad laarr[EXTENT_MERGE_SIZE],
961 int startnum, int endnum,
962 struct extent_position *epos)
965 kernel_lb_addr tmploc;
968 if (startnum > endnum) {
969 for (i = 0; i < (startnum - endnum); i++)
970 udf_delete_aext(inode, *epos, laarr[i].extLocation,
972 } else if (startnum < endnum) {
973 for (i = 0; i < (endnum - startnum); i++) {
974 udf_insert_aext(inode, *epos, laarr[i].extLocation,
976 udf_next_aext(inode, epos, &laarr[i].extLocation,
977 &laarr[i].extLength, 1);
982 for (i = start; i < endnum; i++) {
983 udf_next_aext(inode, epos, &tmploc, &tmplen, 0);
984 udf_write_aext(inode, epos, laarr[i].extLocation,
985 laarr[i].extLength, 1);
989 struct buffer_head *udf_bread(struct inode *inode, int block,
990 int create, int *err)
992 struct buffer_head *bh = NULL;
994 bh = udf_getblk(inode, block, create, err);
998 if (buffer_uptodate(bh))
1001 ll_rw_block(READ, 1, &bh);
1004 if (buffer_uptodate(bh))
1012 void udf_truncate(struct inode *inode)
1016 struct udf_inode_info *iinfo;
1018 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
1019 S_ISLNK(inode->i_mode)))
1021 if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
1025 iinfo = UDF_I(inode);
1026 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
1027 if (inode->i_sb->s_blocksize <
1028 (udf_file_entry_alloc_offset(inode) +
1030 udf_expand_file_adinicb(inode, inode->i_size, &err);
1031 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
1032 inode->i_size = iinfo->i_lenAlloc;
1036 udf_truncate_extents(inode);
1038 offset = inode->i_size & (inode->i_sb->s_blocksize - 1);
1039 memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr + offset,
1040 0x00, inode->i_sb->s_blocksize -
1041 offset - udf_file_entry_alloc_offset(inode));
1042 iinfo->i_lenAlloc = inode->i_size;
1045 block_truncate_page(inode->i_mapping, inode->i_size,
1047 udf_truncate_extents(inode);
1050 inode->i_mtime = inode->i_ctime = current_fs_time(inode->i_sb);
1052 udf_sync_inode(inode);
1054 mark_inode_dirty(inode);
1058 static void __udf_read_inode(struct inode *inode)
1060 struct buffer_head *bh = NULL;
1061 struct fileEntry *fe;
1063 struct udf_inode_info *iinfo = UDF_I(inode);
1066 * Set defaults, but the inode is still incomplete!
1067 * Note: get_new_inode() sets the following on a new inode:
1070 * i_flags = sb->s_flags
1072 * clean_inode(): zero fills and sets
1077 bh = udf_read_ptagged(inode->i_sb, iinfo->i_location, 0, &ident);
1079 printk(KERN_ERR "udf: udf_read_inode(ino %ld) failed !bh\n",
1081 make_bad_inode(inode);
1085 if (ident != TAG_IDENT_FE && ident != TAG_IDENT_EFE &&
1086 ident != TAG_IDENT_USE) {
1087 printk(KERN_ERR "udf: udf_read_inode(ino %ld) "
1088 "failed ident=%d\n", inode->i_ino, ident);
1090 make_bad_inode(inode);
1094 fe = (struct fileEntry *)bh->b_data;
1096 if (fe->icbTag.strategyType == cpu_to_le16(4096)) {
1097 struct buffer_head *ibh;
1099 ibh = udf_read_ptagged(inode->i_sb, iinfo->i_location, 1,
1101 if (ident == TAG_IDENT_IE && ibh) {
1102 struct buffer_head *nbh = NULL;
1104 struct indirectEntry *ie;
1106 ie = (struct indirectEntry *)ibh->b_data;
1107 loc = lelb_to_cpu(ie->indirectICB.extLocation);
1109 if (ie->indirectICB.extLength &&
1110 (nbh = udf_read_ptagged(inode->i_sb, loc, 0,
1112 if (ident == TAG_IDENT_FE ||
1113 ident == TAG_IDENT_EFE) {
1114 memcpy(&iinfo->i_location,
1116 sizeof(kernel_lb_addr));
1120 __udf_read_inode(inode);
1127 } else if (fe->icbTag.strategyType != cpu_to_le16(4)) {
1128 printk(KERN_ERR "udf: unsupported strategy type: %d\n",
1129 le16_to_cpu(fe->icbTag.strategyType));
1131 make_bad_inode(inode);
1134 udf_fill_inode(inode, bh);
1139 static void udf_fill_inode(struct inode *inode, struct buffer_head *bh)
1141 struct fileEntry *fe;
1142 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 inode->i_mode = udf_convert_permissions(fe);
1226 inode->i_mode &= ~UDF_SB(inode->i_sb)->s_umask;
1228 if (iinfo->i_efe == 0) {
1229 inode->i_blocks = le64_to_cpu(fe->logicalBlocksRecorded) <<
1230 (inode->i_sb->s_blocksize_bits - 9);
1232 if (udf_stamp_to_time(&convtime, &convtime_usec,
1233 lets_to_cpu(fe->accessTime))) {
1234 inode->i_atime.tv_sec = convtime;
1235 inode->i_atime.tv_nsec = convtime_usec * 1000;
1237 inode->i_atime = sbi->s_record_time;
1240 if (udf_stamp_to_time(&convtime, &convtime_usec,
1241 lets_to_cpu(fe->modificationTime))) {
1242 inode->i_mtime.tv_sec = convtime;
1243 inode->i_mtime.tv_nsec = convtime_usec * 1000;
1245 inode->i_mtime = sbi->s_record_time;
1248 if (udf_stamp_to_time(&convtime, &convtime_usec,
1249 lets_to_cpu(fe->attrTime))) {
1250 inode->i_ctime.tv_sec = convtime;
1251 inode->i_ctime.tv_nsec = convtime_usec * 1000;
1253 inode->i_ctime = sbi->s_record_time;
1256 iinfo->i_unique = le64_to_cpu(fe->uniqueID);
1257 iinfo->i_lenEAttr = le32_to_cpu(fe->lengthExtendedAttr);
1258 iinfo->i_lenAlloc = le32_to_cpu(fe->lengthAllocDescs);
1259 offset = sizeof(struct fileEntry) + iinfo->i_lenEAttr;
1261 inode->i_blocks = le64_to_cpu(efe->logicalBlocksRecorded) <<
1262 (inode->i_sb->s_blocksize_bits - 9);
1264 if (udf_stamp_to_time(&convtime, &convtime_usec,
1265 lets_to_cpu(efe->accessTime))) {
1266 inode->i_atime.tv_sec = convtime;
1267 inode->i_atime.tv_nsec = convtime_usec * 1000;
1269 inode->i_atime = sbi->s_record_time;
1272 if (udf_stamp_to_time(&convtime, &convtime_usec,
1273 lets_to_cpu(efe->modificationTime))) {
1274 inode->i_mtime.tv_sec = convtime;
1275 inode->i_mtime.tv_nsec = convtime_usec * 1000;
1277 inode->i_mtime = sbi->s_record_time;
1280 if (udf_stamp_to_time(&convtime, &convtime_usec,
1281 lets_to_cpu(efe->createTime))) {
1282 iinfo->i_crtime.tv_sec = convtime;
1283 iinfo->i_crtime.tv_nsec = convtime_usec * 1000;
1285 iinfo->i_crtime = sbi->s_record_time;
1288 if (udf_stamp_to_time(&convtime, &convtime_usec,
1289 lets_to_cpu(efe->attrTime))) {
1290 inode->i_ctime.tv_sec = convtime;
1291 inode->i_ctime.tv_nsec = convtime_usec * 1000;
1293 inode->i_ctime = sbi->s_record_time;
1296 iinfo->i_unique = le64_to_cpu(efe->uniqueID);
1297 iinfo->i_lenEAttr = le32_to_cpu(efe->lengthExtendedAttr);
1298 iinfo->i_lenAlloc = le32_to_cpu(efe->lengthAllocDescs);
1299 offset = sizeof(struct extendedFileEntry) +
1303 switch (fe->icbTag.fileType) {
1304 case ICBTAG_FILE_TYPE_DIRECTORY:
1305 inode->i_op = &udf_dir_inode_operations;
1306 inode->i_fop = &udf_dir_operations;
1307 inode->i_mode |= S_IFDIR;
1310 case ICBTAG_FILE_TYPE_REALTIME:
1311 case ICBTAG_FILE_TYPE_REGULAR:
1312 case ICBTAG_FILE_TYPE_UNDEF:
1313 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
1314 inode->i_data.a_ops = &udf_adinicb_aops;
1316 inode->i_data.a_ops = &udf_aops;
1317 inode->i_op = &udf_file_inode_operations;
1318 inode->i_fop = &udf_file_operations;
1319 inode->i_mode |= S_IFREG;
1321 case ICBTAG_FILE_TYPE_BLOCK:
1322 inode->i_mode |= S_IFBLK;
1324 case ICBTAG_FILE_TYPE_CHAR:
1325 inode->i_mode |= S_IFCHR;
1327 case ICBTAG_FILE_TYPE_FIFO:
1328 init_special_inode(inode, inode->i_mode | S_IFIFO, 0);
1330 case ICBTAG_FILE_TYPE_SOCKET:
1331 init_special_inode(inode, inode->i_mode | S_IFSOCK, 0);
1333 case ICBTAG_FILE_TYPE_SYMLINK:
1334 inode->i_data.a_ops = &udf_symlink_aops;
1335 inode->i_op = &page_symlink_inode_operations;
1336 inode->i_mode = S_IFLNK | S_IRWXUGO;
1339 printk(KERN_ERR "udf: udf_fill_inode(ino %ld) failed unknown "
1340 "file type=%d\n", inode->i_ino,
1341 fe->icbTag.fileType);
1342 make_bad_inode(inode);
1345 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
1346 struct deviceSpec *dsea =
1347 (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1);
1349 init_special_inode(inode, inode->i_mode,
1350 MKDEV(le32_to_cpu(dsea->majorDeviceIdent),
1351 le32_to_cpu(dsea->minorDeviceIdent)));
1352 /* Developer ID ??? */
1354 make_bad_inode(inode);
1358 static int udf_alloc_i_data(struct inode *inode, size_t size)
1360 struct udf_inode_info *iinfo = UDF_I(inode);
1361 iinfo->i_ext.i_data = kmalloc(size, GFP_KERNEL);
1363 if (!iinfo->i_ext.i_data) {
1364 printk(KERN_ERR "udf:udf_alloc_i_data (ino %ld) "
1365 "no free memory\n", inode->i_ino);
1372 static mode_t udf_convert_permissions(struct fileEntry *fe)
1375 uint32_t permissions;
1378 permissions = le32_to_cpu(fe->permissions);
1379 flags = le16_to_cpu(fe->icbTag.flags);
1381 mode = ((permissions) & S_IRWXO) |
1382 ((permissions >> 2) & S_IRWXG) |
1383 ((permissions >> 4) & S_IRWXU) |
1384 ((flags & ICBTAG_FLAG_SETUID) ? S_ISUID : 0) |
1385 ((flags & ICBTAG_FLAG_SETGID) ? S_ISGID : 0) |
1386 ((flags & ICBTAG_FLAG_STICKY) ? S_ISVTX : 0);
1391 int udf_write_inode(struct inode *inode, int sync)
1396 ret = udf_update_inode(inode, sync);
1402 int udf_sync_inode(struct inode *inode)
1404 return udf_update_inode(inode, 1);
1407 static int udf_update_inode(struct inode *inode, int do_sync)
1409 struct buffer_head *bh = NULL;
1410 struct fileEntry *fe;
1411 struct extendedFileEntry *efe;
1415 kernel_timestamp cpu_time;
1417 struct udf_sb_info *sbi = UDF_SB(inode->i_sb);
1418 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits;
1419 struct udf_inode_info *iinfo = UDF_I(inode);
1421 bh = udf_tread(inode->i_sb,
1422 udf_get_lb_pblock(inode->i_sb,
1423 iinfo->i_location, 0));
1425 udf_debug("bread failure\n");
1429 memset(bh->b_data, 0x00, inode->i_sb->s_blocksize);
1431 fe = (struct fileEntry *)bh->b_data;
1432 efe = (struct extendedFileEntry *)bh->b_data;
1434 if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_USE)) {
1435 struct unallocSpaceEntry *use =
1436 (struct unallocSpaceEntry *)bh->b_data;
1438 use->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc);
1439 memcpy(bh->b_data + sizeof(struct unallocSpaceEntry),
1440 iinfo->i_ext.i_data, inode->i_sb->s_blocksize -
1441 sizeof(struct unallocSpaceEntry));
1442 crclen = sizeof(struct unallocSpaceEntry) +
1443 iinfo->i_lenAlloc - sizeof(tag);
1444 use->descTag.tagLocation = cpu_to_le32(
1447 use->descTag.descCRCLength = cpu_to_le16(crclen);
1448 use->descTag.descCRC = cpu_to_le16(udf_crc((char *)use +
1449 sizeof(tag), crclen,
1451 use->descTag.tagChecksum = udf_tag_checksum(&use->descTag);
1453 mark_buffer_dirty(bh);
1458 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_FORGET))
1459 fe->uid = cpu_to_le32(-1);
1461 fe->uid = cpu_to_le32(inode->i_uid);
1463 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_FORGET))
1464 fe->gid = cpu_to_le32(-1);
1466 fe->gid = cpu_to_le32(inode->i_gid);
1468 udfperms = ((inode->i_mode & S_IRWXO)) |
1469 ((inode->i_mode & S_IRWXG) << 2) |
1470 ((inode->i_mode & S_IRWXU) << 4);
1472 udfperms |= (le32_to_cpu(fe->permissions) &
1473 (FE_PERM_O_DELETE | FE_PERM_O_CHATTR |
1474 FE_PERM_G_DELETE | FE_PERM_G_CHATTR |
1475 FE_PERM_U_DELETE | FE_PERM_U_CHATTR));
1476 fe->permissions = cpu_to_le32(udfperms);
1478 if (S_ISDIR(inode->i_mode))
1479 fe->fileLinkCount = cpu_to_le16(inode->i_nlink - 1);
1481 fe->fileLinkCount = cpu_to_le16(inode->i_nlink);
1483 fe->informationLength = cpu_to_le64(inode->i_size);
1485 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
1487 struct deviceSpec *dsea =
1488 (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1);
1490 dsea = (struct deviceSpec *)
1491 udf_add_extendedattr(inode,
1492 sizeof(struct deviceSpec) +
1493 sizeof(regid), 12, 0x3);
1494 dsea->attrType = cpu_to_le32(12);
1495 dsea->attrSubtype = 1;
1496 dsea->attrLength = cpu_to_le32(
1497 sizeof(struct deviceSpec) +
1499 dsea->impUseLength = cpu_to_le32(sizeof(regid));
1501 eid = (regid *)dsea->impUse;
1502 memset(eid, 0, sizeof(regid));
1503 strcpy(eid->ident, UDF_ID_DEVELOPER);
1504 eid->identSuffix[0] = UDF_OS_CLASS_UNIX;
1505 eid->identSuffix[1] = UDF_OS_ID_LINUX;
1506 dsea->majorDeviceIdent = cpu_to_le32(imajor(inode));
1507 dsea->minorDeviceIdent = cpu_to_le32(iminor(inode));
1510 if (iinfo->i_efe == 0) {
1511 memcpy(bh->b_data + sizeof(struct fileEntry),
1512 iinfo->i_ext.i_data,
1513 inode->i_sb->s_blocksize - sizeof(struct fileEntry));
1514 fe->logicalBlocksRecorded = cpu_to_le64(
1515 (inode->i_blocks + (1 << (blocksize_bits - 9)) - 1) >>
1516 (blocksize_bits - 9));
1518 if (udf_time_to_stamp(&cpu_time, inode->i_atime))
1519 fe->accessTime = cpu_to_lets(cpu_time);
1520 if (udf_time_to_stamp(&cpu_time, inode->i_mtime))
1521 fe->modificationTime = cpu_to_lets(cpu_time);
1522 if (udf_time_to_stamp(&cpu_time, inode->i_ctime))
1523 fe->attrTime = cpu_to_lets(cpu_time);
1524 memset(&(fe->impIdent), 0, sizeof(regid));
1525 strcpy(fe->impIdent.ident, UDF_ID_DEVELOPER);
1526 fe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1527 fe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1528 fe->uniqueID = cpu_to_le64(iinfo->i_unique);
1529 fe->lengthExtendedAttr = cpu_to_le32(iinfo->i_lenEAttr);
1530 fe->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc);
1531 fe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_FE);
1532 crclen = sizeof(struct fileEntry);
1534 memcpy(bh->b_data + sizeof(struct extendedFileEntry),
1535 iinfo->i_ext.i_data,
1536 inode->i_sb->s_blocksize -
1537 sizeof(struct extendedFileEntry));
1538 efe->objectSize = cpu_to_le64(inode->i_size);
1539 efe->logicalBlocksRecorded = cpu_to_le64(
1540 (inode->i_blocks + (1 << (blocksize_bits - 9)) - 1) >>
1541 (blocksize_bits - 9));
1543 if (iinfo->i_crtime.tv_sec > inode->i_atime.tv_sec ||
1544 (iinfo->i_crtime.tv_sec == inode->i_atime.tv_sec &&
1545 iinfo->i_crtime.tv_nsec > inode->i_atime.tv_nsec))
1546 iinfo->i_crtime = inode->i_atime;
1548 if (iinfo->i_crtime.tv_sec > inode->i_mtime.tv_sec ||
1549 (iinfo->i_crtime.tv_sec == inode->i_mtime.tv_sec &&
1550 iinfo->i_crtime.tv_nsec > inode->i_mtime.tv_nsec))
1551 iinfo->i_crtime = inode->i_mtime;
1553 if (iinfo->i_crtime.tv_sec > inode->i_ctime.tv_sec ||
1554 (iinfo->i_crtime.tv_sec == inode->i_ctime.tv_sec &&
1555 iinfo->i_crtime.tv_nsec > inode->i_ctime.tv_nsec))
1556 iinfo->i_crtime = inode->i_ctime;
1558 if (udf_time_to_stamp(&cpu_time, inode->i_atime))
1559 efe->accessTime = cpu_to_lets(cpu_time);
1560 if (udf_time_to_stamp(&cpu_time, inode->i_mtime))
1561 efe->modificationTime = cpu_to_lets(cpu_time);
1562 if (udf_time_to_stamp(&cpu_time, iinfo->i_crtime))
1563 efe->createTime = cpu_to_lets(cpu_time);
1564 if (udf_time_to_stamp(&cpu_time, inode->i_ctime))
1565 efe->attrTime = cpu_to_lets(cpu_time);
1567 memset(&(efe->impIdent), 0, sizeof(regid));
1568 strcpy(efe->impIdent.ident, UDF_ID_DEVELOPER);
1569 efe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1570 efe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1571 efe->uniqueID = cpu_to_le64(iinfo->i_unique);
1572 efe->lengthExtendedAttr = cpu_to_le32(iinfo->i_lenEAttr);
1573 efe->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc);
1574 efe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_EFE);
1575 crclen = sizeof(struct extendedFileEntry);
1577 if (iinfo->i_strat4096) {
1578 fe->icbTag.strategyType = cpu_to_le16(4096);
1579 fe->icbTag.strategyParameter = cpu_to_le16(1);
1580 fe->icbTag.numEntries = cpu_to_le16(2);
1582 fe->icbTag.strategyType = cpu_to_le16(4);
1583 fe->icbTag.numEntries = cpu_to_le16(1);
1586 if (S_ISDIR(inode->i_mode))
1587 fe->icbTag.fileType = ICBTAG_FILE_TYPE_DIRECTORY;
1588 else if (S_ISREG(inode->i_mode))
1589 fe->icbTag.fileType = ICBTAG_FILE_TYPE_REGULAR;
1590 else if (S_ISLNK(inode->i_mode))
1591 fe->icbTag.fileType = ICBTAG_FILE_TYPE_SYMLINK;
1592 else if (S_ISBLK(inode->i_mode))
1593 fe->icbTag.fileType = ICBTAG_FILE_TYPE_BLOCK;
1594 else if (S_ISCHR(inode->i_mode))
1595 fe->icbTag.fileType = ICBTAG_FILE_TYPE_CHAR;
1596 else if (S_ISFIFO(inode->i_mode))
1597 fe->icbTag.fileType = ICBTAG_FILE_TYPE_FIFO;
1598 else if (S_ISSOCK(inode->i_mode))
1599 fe->icbTag.fileType = ICBTAG_FILE_TYPE_SOCKET;
1601 icbflags = iinfo->i_alloc_type |
1602 ((inode->i_mode & S_ISUID) ? ICBTAG_FLAG_SETUID : 0) |
1603 ((inode->i_mode & S_ISGID) ? ICBTAG_FLAG_SETGID : 0) |
1604 ((inode->i_mode & S_ISVTX) ? ICBTAG_FLAG_STICKY : 0) |
1605 (le16_to_cpu(fe->icbTag.flags) &
1606 ~(ICBTAG_FLAG_AD_MASK | ICBTAG_FLAG_SETUID |
1607 ICBTAG_FLAG_SETGID | ICBTAG_FLAG_STICKY));
1609 fe->icbTag.flags = cpu_to_le16(icbflags);
1610 if (sbi->s_udfrev >= 0x0200)
1611 fe->descTag.descVersion = cpu_to_le16(3);
1613 fe->descTag.descVersion = cpu_to_le16(2);
1614 fe->descTag.tagSerialNum = cpu_to_le16(sbi->s_serial_number);
1615 fe->descTag.tagLocation = cpu_to_le32(
1616 iinfo->i_location.logicalBlockNum);
1617 crclen += iinfo->i_lenEAttr + iinfo->i_lenAlloc -
1619 fe->descTag.descCRCLength = cpu_to_le16(crclen);
1620 fe->descTag.descCRC = cpu_to_le16(udf_crc((char *)fe + sizeof(tag),
1622 fe->descTag.tagChecksum = udf_tag_checksum(&fe->descTag);
1624 /* write the data blocks */
1625 mark_buffer_dirty(bh);
1627 sync_dirty_buffer(bh);
1628 if (buffer_req(bh) && !buffer_uptodate(bh)) {
1629 printk(KERN_WARNING "IO error syncing udf inode "
1630 "[%s:%08lx]\n", inode->i_sb->s_id,
1640 struct inode *udf_iget(struct super_block *sb, kernel_lb_addr ino)
1642 unsigned long block = udf_get_lb_pblock(sb, ino, 0);
1643 struct inode *inode = iget_locked(sb, block);
1648 if (inode->i_state & I_NEW) {
1649 memcpy(&UDF_I(inode)->i_location, &ino, sizeof(kernel_lb_addr));
1650 __udf_read_inode(inode);
1651 unlock_new_inode(inode);
1654 if (is_bad_inode(inode))
1657 if (ino.logicalBlockNum >= UDF_SB(sb)->
1658 s_partmaps[ino.partitionReferenceNum].s_partition_len) {
1659 udf_debug("block=%d, partition=%d out of range\n",
1660 ino.logicalBlockNum, ino.partitionReferenceNum);
1661 make_bad_inode(inode);
1672 int8_t udf_add_aext(struct inode *inode, struct extent_position *epos,
1673 kernel_lb_addr eloc, uint32_t elen, int inc)
1676 short_ad *sad = NULL;
1677 long_ad *lad = NULL;
1678 struct allocExtDesc *aed;
1681 struct udf_inode_info *iinfo = UDF_I(inode);
1684 ptr = iinfo->i_ext.i_data + epos->offset -
1685 udf_file_entry_alloc_offset(inode) +
1688 ptr = epos->bh->b_data + epos->offset;
1690 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
1691 adsize = sizeof(short_ad);
1692 else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
1693 adsize = sizeof(long_ad);
1697 if (epos->offset + (2 * adsize) > inode->i_sb->s_blocksize) {
1699 struct buffer_head *nbh;
1701 kernel_lb_addr obloc = epos->block;
1703 epos->block.logicalBlockNum = udf_new_block(inode->i_sb, NULL,
1704 obloc.partitionReferenceNum,
1705 obloc.logicalBlockNum, &err);
1706 if (!epos->block.logicalBlockNum)
1708 nbh = udf_tgetblk(inode->i_sb, udf_get_lb_pblock(inode->i_sb,
1714 memset(nbh->b_data, 0x00, inode->i_sb->s_blocksize);
1715 set_buffer_uptodate(nbh);
1717 mark_buffer_dirty_inode(nbh, inode);
1719 aed = (struct allocExtDesc *)(nbh->b_data);
1720 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT))
1721 aed->previousAllocExtLocation =
1722 cpu_to_le32(obloc.logicalBlockNum);
1723 if (epos->offset + adsize > inode->i_sb->s_blocksize) {
1724 loffset = epos->offset;
1725 aed->lengthAllocDescs = cpu_to_le32(adsize);
1726 sptr = ptr - adsize;
1727 dptr = nbh->b_data + sizeof(struct allocExtDesc);
1728 memcpy(dptr, sptr, adsize);
1729 epos->offset = sizeof(struct allocExtDesc) + adsize;
1731 loffset = epos->offset + adsize;
1732 aed->lengthAllocDescs = cpu_to_le32(0);
1734 epos->offset = sizeof(struct allocExtDesc);
1737 aed = (struct allocExtDesc *)epos->bh->b_data;
1738 le32_add_cpu(&aed->lengthAllocDescs, adsize);
1740 iinfo->i_lenAlloc += adsize;
1741 mark_inode_dirty(inode);
1744 if (UDF_SB(inode->i_sb)->s_udfrev >= 0x0200)
1745 udf_new_tag(nbh->b_data, TAG_IDENT_AED, 3, 1,
1746 epos->block.logicalBlockNum, sizeof(tag));
1748 udf_new_tag(nbh->b_data, TAG_IDENT_AED, 2, 1,
1749 epos->block.logicalBlockNum, sizeof(tag));
1750 switch (iinfo->i_alloc_type) {
1751 case ICBTAG_FLAG_AD_SHORT:
1752 sad = (short_ad *)sptr;
1753 sad->extLength = cpu_to_le32(EXT_NEXT_EXTENT_ALLOCDECS |
1754 inode->i_sb->s_blocksize);
1756 cpu_to_le32(epos->block.logicalBlockNum);
1758 case ICBTAG_FLAG_AD_LONG:
1759 lad = (long_ad *)sptr;
1760 lad->extLength = cpu_to_le32(EXT_NEXT_EXTENT_ALLOCDECS |
1761 inode->i_sb->s_blocksize);
1762 lad->extLocation = cpu_to_lelb(epos->block);
1763 memset(lad->impUse, 0x00, sizeof(lad->impUse));
1767 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
1768 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201)
1769 udf_update_tag(epos->bh->b_data, loffset);
1771 udf_update_tag(epos->bh->b_data,
1772 sizeof(struct allocExtDesc));
1773 mark_buffer_dirty_inode(epos->bh, inode);
1776 mark_inode_dirty(inode);
1781 etype = udf_write_aext(inode, epos, eloc, elen, inc);
1784 iinfo->i_lenAlloc += adsize;
1785 mark_inode_dirty(inode);
1787 aed = (struct allocExtDesc *)epos->bh->b_data;
1788 le32_add_cpu(&aed->lengthAllocDescs, adsize);
1789 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
1790 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201)
1791 udf_update_tag(epos->bh->b_data,
1792 epos->offset + (inc ? 0 : adsize));
1794 udf_update_tag(epos->bh->b_data,
1795 sizeof(struct allocExtDesc));
1796 mark_buffer_dirty_inode(epos->bh, inode);
1802 int8_t udf_write_aext(struct inode *inode, struct extent_position *epos,
1803 kernel_lb_addr eloc, uint32_t elen, int inc)
1809 struct udf_inode_info *iinfo = UDF_I(inode);
1812 ptr = iinfo->i_ext.i_data + epos->offset -
1813 udf_file_entry_alloc_offset(inode) +
1816 ptr = epos->bh->b_data + epos->offset;
1818 switch (iinfo->i_alloc_type) {
1819 case ICBTAG_FLAG_AD_SHORT:
1820 sad = (short_ad *)ptr;
1821 sad->extLength = cpu_to_le32(elen);
1822 sad->extPosition = cpu_to_le32(eloc.logicalBlockNum);
1823 adsize = sizeof(short_ad);
1825 case ICBTAG_FLAG_AD_LONG:
1826 lad = (long_ad *)ptr;
1827 lad->extLength = cpu_to_le32(elen);
1828 lad->extLocation = cpu_to_lelb(eloc);
1829 memset(lad->impUse, 0x00, sizeof(lad->impUse));
1830 adsize = sizeof(long_ad);
1837 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
1838 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) {
1839 struct allocExtDesc *aed =
1840 (struct allocExtDesc *)epos->bh->b_data;
1841 udf_update_tag(epos->bh->b_data,
1842 le32_to_cpu(aed->lengthAllocDescs) +
1843 sizeof(struct allocExtDesc));
1845 mark_buffer_dirty_inode(epos->bh, inode);
1847 mark_inode_dirty(inode);
1851 epos->offset += adsize;
1853 return (elen >> 30);
1856 int8_t udf_next_aext(struct inode *inode, struct extent_position *epos,
1857 kernel_lb_addr *eloc, uint32_t *elen, int inc)
1861 while ((etype = udf_current_aext(inode, epos, eloc, elen, inc)) ==
1862 (EXT_NEXT_EXTENT_ALLOCDECS >> 30)) {
1864 epos->block = *eloc;
1865 epos->offset = sizeof(struct allocExtDesc);
1867 block = udf_get_lb_pblock(inode->i_sb, epos->block, 0);
1868 epos->bh = udf_tread(inode->i_sb, block);
1870 udf_debug("reading block %d failed!\n", block);
1878 int8_t udf_current_aext(struct inode *inode, struct extent_position *epos,
1879 kernel_lb_addr *eloc, uint32_t *elen, int inc)
1886 struct udf_inode_info *iinfo = UDF_I(inode);
1890 epos->offset = udf_file_entry_alloc_offset(inode);
1891 ptr = iinfo->i_ext.i_data + epos->offset -
1892 udf_file_entry_alloc_offset(inode) +
1894 alen = udf_file_entry_alloc_offset(inode) +
1898 epos->offset = sizeof(struct allocExtDesc);
1899 ptr = epos->bh->b_data + epos->offset;
1900 alen = sizeof(struct allocExtDesc) +
1901 le32_to_cpu(((struct allocExtDesc *)epos->bh->b_data)->
1905 switch (iinfo->i_alloc_type) {
1906 case ICBTAG_FLAG_AD_SHORT:
1907 sad = udf_get_fileshortad(ptr, alen, &epos->offset, inc);
1910 etype = le32_to_cpu(sad->extLength) >> 30;
1911 eloc->logicalBlockNum = le32_to_cpu(sad->extPosition);
1912 eloc->partitionReferenceNum =
1913 iinfo->i_location.partitionReferenceNum;
1914 *elen = le32_to_cpu(sad->extLength) & UDF_EXTENT_LENGTH_MASK;
1916 case ICBTAG_FLAG_AD_LONG:
1917 lad = udf_get_filelongad(ptr, alen, &epos->offset, inc);
1920 etype = le32_to_cpu(lad->extLength) >> 30;
1921 *eloc = lelb_to_cpu(lad->extLocation);
1922 *elen = le32_to_cpu(lad->extLength) & UDF_EXTENT_LENGTH_MASK;
1925 udf_debug("alloc_type = %d unsupported\n",
1926 iinfo->i_alloc_type);
1933 static int8_t udf_insert_aext(struct inode *inode, struct extent_position epos,
1934 kernel_lb_addr neloc, uint32_t nelen)
1936 kernel_lb_addr oeloc;
1943 while ((etype = udf_next_aext(inode, &epos, &oeloc, &oelen, 0)) != -1) {
1944 udf_write_aext(inode, &epos, neloc, nelen, 1);
1946 nelen = (etype << 30) | oelen;
1948 udf_add_aext(inode, &epos, neloc, nelen, 1);
1951 return (nelen >> 30);
1954 int8_t udf_delete_aext(struct inode *inode, struct extent_position epos,
1955 kernel_lb_addr eloc, uint32_t elen)
1957 struct extent_position oepos;
1960 struct allocExtDesc *aed;
1961 struct udf_inode_info *iinfo;
1968 iinfo = UDF_I(inode);
1969 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
1970 adsize = sizeof(short_ad);
1971 else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
1972 adsize = sizeof(long_ad);
1977 if (udf_next_aext(inode, &epos, &eloc, &elen, 1) == -1)
1980 while ((etype = udf_next_aext(inode, &epos, &eloc, &elen, 1)) != -1) {
1981 udf_write_aext(inode, &oepos, eloc, (etype << 30) | elen, 1);
1982 if (oepos.bh != epos.bh) {
1983 oepos.block = epos.block;
1987 oepos.offset = epos.offset - adsize;
1990 memset(&eloc, 0x00, sizeof(kernel_lb_addr));
1993 if (epos.bh != oepos.bh) {
1994 udf_free_blocks(inode->i_sb, inode, epos.block, 0, 1);
1995 udf_write_aext(inode, &oepos, eloc, elen, 1);
1996 udf_write_aext(inode, &oepos, eloc, elen, 1);
1998 iinfo->i_lenAlloc -= (adsize * 2);
1999 mark_inode_dirty(inode);
2001 aed = (struct allocExtDesc *)oepos.bh->b_data;
2002 le32_add_cpu(&aed->lengthAllocDescs, -(2 * adsize));
2003 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
2004 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201)
2005 udf_update_tag(oepos.bh->b_data,
2006 oepos.offset - (2 * adsize));
2008 udf_update_tag(oepos.bh->b_data,
2009 sizeof(struct allocExtDesc));
2010 mark_buffer_dirty_inode(oepos.bh, inode);
2013 udf_write_aext(inode, &oepos, eloc, elen, 1);
2015 iinfo->i_lenAlloc -= adsize;
2016 mark_inode_dirty(inode);
2018 aed = (struct allocExtDesc *)oepos.bh->b_data;
2019 le32_add_cpu(&aed->lengthAllocDescs, -adsize);
2020 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
2021 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201)
2022 udf_update_tag(oepos.bh->b_data,
2023 epos.offset - adsize);
2025 udf_update_tag(oepos.bh->b_data,
2026 sizeof(struct allocExtDesc));
2027 mark_buffer_dirty_inode(oepos.bh, inode);
2034 return (elen >> 30);
2037 int8_t inode_bmap(struct inode *inode, sector_t block,
2038 struct extent_position *pos, kernel_lb_addr *eloc,
2039 uint32_t *elen, sector_t *offset)
2041 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits;
2042 loff_t lbcount = 0, bcount =
2043 (loff_t) block << blocksize_bits;
2045 struct udf_inode_info *iinfo;
2047 iinfo = UDF_I(inode);
2049 pos->block = iinfo->i_location;
2054 etype = udf_next_aext(inode, pos, eloc, elen, 1);
2056 *offset = (bcount - lbcount) >> blocksize_bits;
2057 iinfo->i_lenExtents = lbcount;
2061 } while (lbcount <= bcount);
2063 *offset = (bcount + *elen - lbcount) >> blocksize_bits;
2068 long udf_block_map(struct inode *inode, sector_t block)
2070 kernel_lb_addr eloc;
2073 struct extent_position epos = {};
2078 if (inode_bmap(inode, block, &epos, &eloc, &elen, &offset) ==
2079 (EXT_RECORDED_ALLOCATED >> 30))
2080 ret = udf_get_lb_pblock(inode->i_sb, eloc, offset);
2087 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_VARCONV))
2088 return udf_fixed_to_variable(ret);