5 * Inode handling routines for the OSTA-UDF(tm) filesystem.
8 * This file is distributed under the terms of the GNU General Public
9 * License (GPL). Copies of the GPL can be obtained from:
10 * ftp://prep.ai.mit.edu/pub/gnu/GPL
11 * Each contributing author retains all rights to their own work.
13 * (C) 1998 Dave Boynton
14 * (C) 1998-2004 Ben Fennema
15 * (C) 1999-2000 Stelias Computing Inc
19 * 10/04/98 dgb Added rudimentary directory functions
20 * 10/07/98 Fully working udf_block_map! It works!
21 * 11/25/98 bmap altered to better support extents
22 * 12/06/98 blf partition support in udf_iget, udf_block_map
24 * 12/12/98 rewrote udf_block_map to handle next extents and descs across
25 * block boundaries (which is not actually allowed)
26 * 12/20/98 added support for strategy 4096
27 * 03/07/99 rewrote udf_block_map (again)
28 * New funcs, inode_bmap, udf_next_aext
29 * 04/19/99 Support for writing device EA's for major/minor #
34 #include <linux/module.h>
35 #include <linux/pagemap.h>
36 #include <linux/buffer_head.h>
37 #include <linux/writeback.h>
38 #include <linux/slab.h>
39 #include <linux/crc-itu-t.h>
40 #include <linux/mpage.h>
41 #include <linux/aio.h>
46 MODULE_AUTHOR("Ben Fennema");
47 MODULE_DESCRIPTION("Universal Disk Format Filesystem");
48 MODULE_LICENSE("GPL");
50 #define EXTENT_MERGE_SIZE 5
52 static umode_t udf_convert_permissions(struct fileEntry *);
53 static int udf_update_inode(struct inode *, int);
54 static void udf_fill_inode(struct inode *, struct buffer_head *);
55 static int udf_sync_inode(struct inode *inode);
56 static int udf_alloc_i_data(struct inode *inode, size_t size);
57 static sector_t inode_getblk(struct inode *, sector_t, int *, int *);
58 static int8_t udf_insert_aext(struct inode *, struct extent_position,
59 struct kernel_lb_addr, uint32_t);
60 static void udf_split_extents(struct inode *, int *, int, int,
61 struct kernel_long_ad[EXTENT_MERGE_SIZE], int *);
62 static void udf_prealloc_extents(struct inode *, int, int,
63 struct kernel_long_ad[EXTENT_MERGE_SIZE], int *);
64 static void udf_merge_extents(struct inode *,
65 struct kernel_long_ad[EXTENT_MERGE_SIZE], int *);
66 static void udf_update_extents(struct inode *,
67 struct kernel_long_ad[EXTENT_MERGE_SIZE], int, int,
68 struct extent_position *);
69 static int udf_get_block(struct inode *, sector_t, struct buffer_head *, int);
71 static void __udf_clear_extent_cache(struct inode *inode)
73 struct udf_inode_info *iinfo = UDF_I(inode);
75 if (iinfo->cached_extent.lstart != -1) {
76 brelse(iinfo->cached_extent.epos.bh);
77 iinfo->cached_extent.lstart = -1;
81 /* Invalidate extent cache */
82 static void udf_clear_extent_cache(struct inode *inode)
84 struct udf_inode_info *iinfo = UDF_I(inode);
86 spin_lock(&iinfo->i_extent_cache_lock);
87 __udf_clear_extent_cache(inode);
88 spin_unlock(&iinfo->i_extent_cache_lock);
91 /* Return contents of extent cache */
92 static int udf_read_extent_cache(struct inode *inode, loff_t bcount,
93 loff_t *lbcount, struct extent_position *pos)
95 struct udf_inode_info *iinfo = UDF_I(inode);
98 spin_lock(&iinfo->i_extent_cache_lock);
99 if ((iinfo->cached_extent.lstart <= bcount) &&
100 (iinfo->cached_extent.lstart != -1)) {
102 *lbcount = iinfo->cached_extent.lstart;
103 memcpy(pos, &iinfo->cached_extent.epos,
104 sizeof(struct extent_position));
109 spin_unlock(&iinfo->i_extent_cache_lock);
113 /* Add extent to extent cache */
114 static void udf_update_extent_cache(struct inode *inode, loff_t estart,
115 struct extent_position *pos, int next_epos)
117 struct udf_inode_info *iinfo = UDF_I(inode);
119 spin_lock(&iinfo->i_extent_cache_lock);
120 /* Invalidate previously cached extent */
121 __udf_clear_extent_cache(inode);
124 memcpy(&iinfo->cached_extent.epos, pos,
125 sizeof(struct extent_position));
126 iinfo->cached_extent.lstart = estart;
128 switch (iinfo->i_alloc_type) {
129 case ICBTAG_FLAG_AD_SHORT:
130 iinfo->cached_extent.epos.offset -=
131 sizeof(struct short_ad);
133 case ICBTAG_FLAG_AD_LONG:
134 iinfo->cached_extent.epos.offset -=
135 sizeof(struct long_ad);
137 spin_unlock(&iinfo->i_extent_cache_lock);
140 void udf_evict_inode(struct inode *inode)
142 struct udf_inode_info *iinfo = UDF_I(inode);
145 if (!inode->i_nlink && !is_bad_inode(inode)) {
147 udf_setsize(inode, 0);
148 udf_update_inode(inode, IS_SYNC(inode));
150 truncate_inode_pages(&inode->i_data, 0);
151 invalidate_inode_buffers(inode);
153 if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB &&
154 inode->i_size != iinfo->i_lenExtents) {
155 udf_warn(inode->i_sb, "Inode %lu (mode %o) has inode size %llu different from extent length %llu. Filesystem need not be standards compliant.\n",
156 inode->i_ino, inode->i_mode,
157 (unsigned long long)inode->i_size,
158 (unsigned long long)iinfo->i_lenExtents);
160 kfree(iinfo->i_ext.i_data);
161 iinfo->i_ext.i_data = NULL;
162 udf_clear_extent_cache(inode);
164 udf_free_inode(inode);
168 static void udf_write_failed(struct address_space *mapping, loff_t to)
170 struct inode *inode = mapping->host;
171 struct udf_inode_info *iinfo = UDF_I(inode);
172 loff_t isize = inode->i_size;
175 truncate_pagecache(inode, to, isize);
176 if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
177 down_write(&iinfo->i_data_sem);
178 udf_clear_extent_cache(inode);
179 udf_truncate_extents(inode);
180 up_write(&iinfo->i_data_sem);
185 static int udf_writepage(struct page *page, struct writeback_control *wbc)
187 return block_write_full_page(page, udf_get_block, wbc);
190 static int udf_writepages(struct address_space *mapping,
191 struct writeback_control *wbc)
193 return mpage_writepages(mapping, wbc, udf_get_block);
196 static int udf_readpage(struct file *file, struct page *page)
198 return mpage_readpage(page, udf_get_block);
201 static int udf_readpages(struct file *file, struct address_space *mapping,
202 struct list_head *pages, unsigned nr_pages)
204 return mpage_readpages(mapping, pages, nr_pages, udf_get_block);
207 static int udf_write_begin(struct file *file, struct address_space *mapping,
208 loff_t pos, unsigned len, unsigned flags,
209 struct page **pagep, void **fsdata)
213 ret = block_write_begin(mapping, pos, len, flags, pagep, udf_get_block);
215 udf_write_failed(mapping, pos + len);
219 static ssize_t udf_direct_IO(int rw, struct kiocb *iocb,
220 const struct iovec *iov,
221 loff_t offset, unsigned long nr_segs)
223 struct file *file = iocb->ki_filp;
224 struct address_space *mapping = file->f_mapping;
225 struct inode *inode = mapping->host;
228 ret = blockdev_direct_IO(rw, iocb, inode, iov, offset, nr_segs,
230 if (unlikely(ret < 0 && (rw & WRITE)))
231 udf_write_failed(mapping, offset + iov_length(iov, nr_segs));
235 static sector_t udf_bmap(struct address_space *mapping, sector_t block)
237 return generic_block_bmap(mapping, block, udf_get_block);
240 const struct address_space_operations udf_aops = {
241 .readpage = udf_readpage,
242 .readpages = udf_readpages,
243 .writepage = udf_writepage,
244 .writepages = udf_writepages,
245 .write_begin = udf_write_begin,
246 .write_end = generic_write_end,
247 .direct_IO = udf_direct_IO,
252 * Expand file stored in ICB to a normal one-block-file
254 * This function requires i_data_sem for writing and releases it.
255 * This function requires i_mutex held
257 int udf_expand_file_adinicb(struct inode *inode)
261 struct udf_inode_info *iinfo = UDF_I(inode);
263 struct writeback_control udf_wbc = {
264 .sync_mode = WB_SYNC_NONE,
268 if (!iinfo->i_lenAlloc) {
269 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))
270 iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT;
272 iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG;
273 /* from now on we have normal address_space methods */
274 inode->i_data.a_ops = &udf_aops;
275 up_write(&iinfo->i_data_sem);
276 mark_inode_dirty(inode);
280 * Release i_data_sem so that we can lock a page - page lock ranks
281 * above i_data_sem. i_mutex still protects us against file changes.
283 up_write(&iinfo->i_data_sem);
285 page = find_or_create_page(inode->i_mapping, 0, GFP_NOFS);
289 if (!PageUptodate(page)) {
291 memset(kaddr + iinfo->i_lenAlloc, 0x00,
292 PAGE_CACHE_SIZE - iinfo->i_lenAlloc);
293 memcpy(kaddr, iinfo->i_ext.i_data + iinfo->i_lenEAttr,
295 flush_dcache_page(page);
296 SetPageUptodate(page);
299 down_write(&iinfo->i_data_sem);
300 memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr, 0x00,
302 iinfo->i_lenAlloc = 0;
303 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))
304 iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT;
306 iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG;
307 /* from now on we have normal address_space methods */
308 inode->i_data.a_ops = &udf_aops;
309 up_write(&iinfo->i_data_sem);
310 err = inode->i_data.a_ops->writepage(page, &udf_wbc);
312 /* Restore everything back so that we don't lose data... */
315 down_write(&iinfo->i_data_sem);
316 memcpy(iinfo->i_ext.i_data + iinfo->i_lenEAttr, kaddr,
320 iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB;
321 inode->i_data.a_ops = &udf_adinicb_aops;
322 up_write(&iinfo->i_data_sem);
324 page_cache_release(page);
325 mark_inode_dirty(inode);
330 struct buffer_head *udf_expand_dir_adinicb(struct inode *inode, int *block,
334 struct buffer_head *dbh = NULL;
335 struct kernel_lb_addr eloc;
337 struct extent_position epos;
339 struct udf_fileident_bh sfibh, dfibh;
340 loff_t f_pos = udf_ext0_offset(inode);
341 int size = udf_ext0_offset(inode) + inode->i_size;
342 struct fileIdentDesc cfi, *sfi, *dfi;
343 struct udf_inode_info *iinfo = UDF_I(inode);
345 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))
346 alloctype = ICBTAG_FLAG_AD_SHORT;
348 alloctype = ICBTAG_FLAG_AD_LONG;
350 if (!inode->i_size) {
351 iinfo->i_alloc_type = alloctype;
352 mark_inode_dirty(inode);
356 /* alloc block, and copy data to it */
357 *block = udf_new_block(inode->i_sb, inode,
358 iinfo->i_location.partitionReferenceNum,
359 iinfo->i_location.logicalBlockNum, err);
362 newblock = udf_get_pblock(inode->i_sb, *block,
363 iinfo->i_location.partitionReferenceNum,
367 dbh = udf_tgetblk(inode->i_sb, newblock);
371 memset(dbh->b_data, 0x00, inode->i_sb->s_blocksize);
372 set_buffer_uptodate(dbh);
374 mark_buffer_dirty_inode(dbh, inode);
376 sfibh.soffset = sfibh.eoffset =
377 f_pos & (inode->i_sb->s_blocksize - 1);
378 sfibh.sbh = sfibh.ebh = NULL;
379 dfibh.soffset = dfibh.eoffset = 0;
380 dfibh.sbh = dfibh.ebh = dbh;
381 while (f_pos < size) {
382 iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB;
383 sfi = udf_fileident_read(inode, &f_pos, &sfibh, &cfi, NULL,
389 iinfo->i_alloc_type = alloctype;
390 sfi->descTag.tagLocation = cpu_to_le32(*block);
391 dfibh.soffset = dfibh.eoffset;
392 dfibh.eoffset += (sfibh.eoffset - sfibh.soffset);
393 dfi = (struct fileIdentDesc *)(dbh->b_data + dfibh.soffset);
394 if (udf_write_fi(inode, sfi, dfi, &dfibh, sfi->impUse,
396 le16_to_cpu(sfi->lengthOfImpUse))) {
397 iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB;
402 mark_buffer_dirty_inode(dbh, inode);
404 memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr, 0,
406 iinfo->i_lenAlloc = 0;
407 eloc.logicalBlockNum = *block;
408 eloc.partitionReferenceNum =
409 iinfo->i_location.partitionReferenceNum;
410 iinfo->i_lenExtents = inode->i_size;
412 epos.block = iinfo->i_location;
413 epos.offset = udf_file_entry_alloc_offset(inode);
414 udf_add_aext(inode, &epos, &eloc, inode->i_size, 0);
418 mark_inode_dirty(inode);
422 static int udf_get_block(struct inode *inode, sector_t block,
423 struct buffer_head *bh_result, int create)
427 struct udf_inode_info *iinfo;
430 phys = udf_block_map(inode, block);
432 map_bh(bh_result, inode->i_sb, phys);
438 iinfo = UDF_I(inode);
440 down_write(&iinfo->i_data_sem);
441 if (block == iinfo->i_next_alloc_block + 1) {
442 iinfo->i_next_alloc_block++;
443 iinfo->i_next_alloc_goal++;
446 udf_clear_extent_cache(inode);
447 phys = inode_getblk(inode, block, &err, &new);
452 set_buffer_new(bh_result);
453 map_bh(bh_result, inode->i_sb, phys);
456 up_write(&iinfo->i_data_sem);
460 static struct buffer_head *udf_getblk(struct inode *inode, long block,
461 int create, int *err)
463 struct buffer_head *bh;
464 struct buffer_head dummy;
467 dummy.b_blocknr = -1000;
468 *err = udf_get_block(inode, block, &dummy, create);
469 if (!*err && buffer_mapped(&dummy)) {
470 bh = sb_getblk(inode->i_sb, dummy.b_blocknr);
471 if (buffer_new(&dummy)) {
473 memset(bh->b_data, 0x00, inode->i_sb->s_blocksize);
474 set_buffer_uptodate(bh);
476 mark_buffer_dirty_inode(bh, inode);
484 /* Extend the file by 'blocks' blocks, return the number of extents added */
485 static int udf_do_extend_file(struct inode *inode,
486 struct extent_position *last_pos,
487 struct kernel_long_ad *last_ext,
491 int count = 0, fake = !(last_ext->extLength & UDF_EXTENT_LENGTH_MASK);
492 struct super_block *sb = inode->i_sb;
493 struct kernel_lb_addr prealloc_loc = {};
494 int prealloc_len = 0;
495 struct udf_inode_info *iinfo;
498 /* The previous extent is fake and we should not extend by anything
499 * - there's nothing to do... */
503 iinfo = UDF_I(inode);
504 /* Round the last extent up to a multiple of block size */
505 if (last_ext->extLength & (sb->s_blocksize - 1)) {
506 last_ext->extLength =
507 (last_ext->extLength & UDF_EXTENT_FLAG_MASK) |
508 (((last_ext->extLength & UDF_EXTENT_LENGTH_MASK) +
509 sb->s_blocksize - 1) & ~(sb->s_blocksize - 1));
510 iinfo->i_lenExtents =
511 (iinfo->i_lenExtents + sb->s_blocksize - 1) &
512 ~(sb->s_blocksize - 1);
515 /* Last extent are just preallocated blocks? */
516 if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) ==
517 EXT_NOT_RECORDED_ALLOCATED) {
518 /* Save the extent so that we can reattach it to the end */
519 prealloc_loc = last_ext->extLocation;
520 prealloc_len = last_ext->extLength;
521 /* Mark the extent as a hole */
522 last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED |
523 (last_ext->extLength & UDF_EXTENT_LENGTH_MASK);
524 last_ext->extLocation.logicalBlockNum = 0;
525 last_ext->extLocation.partitionReferenceNum = 0;
528 /* Can we merge with the previous extent? */
529 if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) ==
530 EXT_NOT_RECORDED_NOT_ALLOCATED) {
531 add = ((1 << 30) - sb->s_blocksize -
532 (last_ext->extLength & UDF_EXTENT_LENGTH_MASK)) >>
533 sb->s_blocksize_bits;
537 last_ext->extLength += add << sb->s_blocksize_bits;
541 udf_add_aext(inode, last_pos, &last_ext->extLocation,
542 last_ext->extLength, 1);
545 udf_write_aext(inode, last_pos, &last_ext->extLocation,
546 last_ext->extLength, 1);
548 /* Managed to do everything necessary? */
552 /* All further extents will be NOT_RECORDED_NOT_ALLOCATED */
553 last_ext->extLocation.logicalBlockNum = 0;
554 last_ext->extLocation.partitionReferenceNum = 0;
555 add = (1 << (30-sb->s_blocksize_bits)) - 1;
556 last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED |
557 (add << sb->s_blocksize_bits);
559 /* Create enough extents to cover the whole hole */
560 while (blocks > add) {
562 err = udf_add_aext(inode, last_pos, &last_ext->extLocation,
563 last_ext->extLength, 1);
569 last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED |
570 (blocks << sb->s_blocksize_bits);
571 err = udf_add_aext(inode, last_pos, &last_ext->extLocation,
572 last_ext->extLength, 1);
579 /* Do we have some preallocated blocks saved? */
581 err = udf_add_aext(inode, last_pos, &prealloc_loc,
585 last_ext->extLocation = prealloc_loc;
586 last_ext->extLength = prealloc_len;
590 /* last_pos should point to the last written extent... */
591 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
592 last_pos->offset -= sizeof(struct short_ad);
593 else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
594 last_pos->offset -= sizeof(struct long_ad);
601 static int udf_extend_file(struct inode *inode, loff_t newsize)
604 struct extent_position epos;
605 struct kernel_lb_addr eloc;
608 struct super_block *sb = inode->i_sb;
609 sector_t first_block = newsize >> sb->s_blocksize_bits, offset;
611 struct udf_inode_info *iinfo = UDF_I(inode);
612 struct kernel_long_ad extent;
615 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
616 adsize = sizeof(struct short_ad);
617 else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
618 adsize = sizeof(struct long_ad);
622 etype = inode_bmap(inode, first_block, &epos, &eloc, &elen, &offset);
624 /* File has extent covering the new size (could happen when extending
625 * inside a block)? */
628 if (newsize & (sb->s_blocksize - 1))
630 /* Extended file just to the boundary of the last file block? */
634 /* Truncate is extending the file by 'offset' blocks */
635 if ((!epos.bh && epos.offset == udf_file_entry_alloc_offset(inode)) ||
636 (epos.bh && epos.offset == sizeof(struct allocExtDesc))) {
637 /* File has no extents at all or has empty last
638 * indirect extent! Create a fake extent... */
639 extent.extLocation.logicalBlockNum = 0;
640 extent.extLocation.partitionReferenceNum = 0;
641 extent.extLength = EXT_NOT_RECORDED_NOT_ALLOCATED;
643 epos.offset -= adsize;
644 etype = udf_next_aext(inode, &epos, &extent.extLocation,
645 &extent.extLength, 0);
646 extent.extLength |= etype << 30;
648 err = udf_do_extend_file(inode, &epos, &extent, offset);
652 iinfo->i_lenExtents = newsize;
658 static sector_t inode_getblk(struct inode *inode, sector_t block,
661 struct kernel_long_ad laarr[EXTENT_MERGE_SIZE];
662 struct extent_position prev_epos, cur_epos, next_epos;
663 int count = 0, startnum = 0, endnum = 0;
664 uint32_t elen = 0, tmpelen;
665 struct kernel_lb_addr eloc, tmpeloc;
667 loff_t lbcount = 0, b_off = 0;
668 uint32_t newblocknum, newblock;
671 struct udf_inode_info *iinfo = UDF_I(inode);
672 int goal = 0, pgoal = iinfo->i_location.logicalBlockNum;
678 prev_epos.offset = udf_file_entry_alloc_offset(inode);
679 prev_epos.block = iinfo->i_location;
681 cur_epos = next_epos = prev_epos;
682 b_off = (loff_t)block << inode->i_sb->s_blocksize_bits;
684 /* find the extent which contains the block we are looking for.
685 alternate between laarr[0] and laarr[1] for locations of the
686 current extent, and the previous extent */
688 if (prev_epos.bh != cur_epos.bh) {
689 brelse(prev_epos.bh);
691 prev_epos.bh = cur_epos.bh;
693 if (cur_epos.bh != next_epos.bh) {
695 get_bh(next_epos.bh);
696 cur_epos.bh = next_epos.bh;
701 prev_epos.block = cur_epos.block;
702 cur_epos.block = next_epos.block;
704 prev_epos.offset = cur_epos.offset;
705 cur_epos.offset = next_epos.offset;
707 etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 1);
713 laarr[c].extLength = (etype << 30) | elen;
714 laarr[c].extLocation = eloc;
716 if (etype != (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))
717 pgoal = eloc.logicalBlockNum +
718 ((elen + inode->i_sb->s_blocksize - 1) >>
719 inode->i_sb->s_blocksize_bits);
722 } while (lbcount + elen <= b_off);
725 offset = b_off >> inode->i_sb->s_blocksize_bits;
727 * Move prev_epos and cur_epos into indirect extent if we are at
730 udf_next_aext(inode, &prev_epos, &tmpeloc, &tmpelen, 0);
731 udf_next_aext(inode, &cur_epos, &tmpeloc, &tmpelen, 0);
733 /* if the extent is allocated and recorded, return the block
734 if the extent is not a multiple of the blocksize, round up */
736 if (etype == (EXT_RECORDED_ALLOCATED >> 30)) {
737 if (elen & (inode->i_sb->s_blocksize - 1)) {
738 elen = EXT_RECORDED_ALLOCATED |
739 ((elen + inode->i_sb->s_blocksize - 1) &
740 ~(inode->i_sb->s_blocksize - 1));
741 udf_write_aext(inode, &cur_epos, &eloc, elen, 1);
743 brelse(prev_epos.bh);
745 brelse(next_epos.bh);
746 newblock = udf_get_lb_pblock(inode->i_sb, &eloc, offset);
750 /* Are we beyond EOF? */
759 /* Create a fake extent when there's not one */
760 memset(&laarr[0].extLocation, 0x00,
761 sizeof(struct kernel_lb_addr));
762 laarr[0].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED;
763 /* Will udf_do_extend_file() create real extent from
765 startnum = (offset > 0);
767 /* Create extents for the hole between EOF and offset */
768 ret = udf_do_extend_file(inode, &prev_epos, laarr, offset);
770 brelse(prev_epos.bh);
772 brelse(next_epos.bh);
779 /* We are not covered by a preallocated extent? */
780 if ((laarr[0].extLength & UDF_EXTENT_FLAG_MASK) !=
781 EXT_NOT_RECORDED_ALLOCATED) {
782 /* Is there any real extent? - otherwise we overwrite
786 laarr[c].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED |
787 inode->i_sb->s_blocksize;
788 memset(&laarr[c].extLocation, 0x00,
789 sizeof(struct kernel_lb_addr));
796 endnum = startnum = ((count > 2) ? 2 : count);
798 /* if the current extent is in position 0,
799 swap it with the previous */
800 if (!c && count != 1) {
807 /* if the current block is located in an extent,
808 read the next extent */
809 etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 0);
811 laarr[c + 1].extLength = (etype << 30) | elen;
812 laarr[c + 1].extLocation = eloc;
820 /* if the current extent is not recorded but allocated, get the
821 * block in the extent corresponding to the requested block */
822 if ((laarr[c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30))
823 newblocknum = laarr[c].extLocation.logicalBlockNum + offset;
824 else { /* otherwise, allocate a new block */
825 if (iinfo->i_next_alloc_block == block)
826 goal = iinfo->i_next_alloc_goal;
829 if (!(goal = pgoal)) /* XXX: what was intended here? */
830 goal = iinfo->i_location.logicalBlockNum + 1;
833 newblocknum = udf_new_block(inode->i_sb, inode,
834 iinfo->i_location.partitionReferenceNum,
837 brelse(prev_epos.bh);
839 brelse(next_epos.bh);
844 iinfo->i_lenExtents += inode->i_sb->s_blocksize;
847 /* if the extent the requsted block is located in contains multiple
848 * blocks, split the extent into at most three extents. blocks prior
849 * to requested block, requested block, and blocks after requested
851 udf_split_extents(inode, &c, offset, newblocknum, laarr, &endnum);
853 #ifdef UDF_PREALLOCATE
854 /* We preallocate blocks only for regular files. It also makes sense
855 * for directories but there's a problem when to drop the
856 * preallocation. We might use some delayed work for that but I feel
857 * it's overengineering for a filesystem like UDF. */
858 if (S_ISREG(inode->i_mode))
859 udf_prealloc_extents(inode, c, lastblock, laarr, &endnum);
862 /* merge any continuous blocks in laarr */
863 udf_merge_extents(inode, laarr, &endnum);
865 /* write back the new extents, inserting new extents if the new number
866 * of extents is greater than the old number, and deleting extents if
867 * the new number of extents is less than the old number */
868 udf_update_extents(inode, laarr, startnum, endnum, &prev_epos);
870 brelse(prev_epos.bh);
872 brelse(next_epos.bh);
874 newblock = udf_get_pblock(inode->i_sb, newblocknum,
875 iinfo->i_location.partitionReferenceNum, 0);
881 iinfo->i_next_alloc_block = block;
882 iinfo->i_next_alloc_goal = newblocknum;
883 inode->i_ctime = current_fs_time(inode->i_sb);
886 udf_sync_inode(inode);
888 mark_inode_dirty(inode);
893 static void udf_split_extents(struct inode *inode, int *c, int offset,
895 struct kernel_long_ad laarr[EXTENT_MERGE_SIZE],
898 unsigned long blocksize = inode->i_sb->s_blocksize;
899 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits;
901 if ((laarr[*c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30) ||
902 (laarr[*c].extLength >> 30) ==
903 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) {
905 int blen = ((laarr[curr].extLength & UDF_EXTENT_LENGTH_MASK) +
906 blocksize - 1) >> blocksize_bits;
907 int8_t etype = (laarr[curr].extLength >> 30);
911 else if (!offset || blen == offset + 1) {
912 laarr[curr + 2] = laarr[curr + 1];
913 laarr[curr + 1] = laarr[curr];
915 laarr[curr + 3] = laarr[curr + 1];
916 laarr[curr + 2] = laarr[curr + 1] = laarr[curr];
920 if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30)) {
921 udf_free_blocks(inode->i_sb, inode,
922 &laarr[curr].extLocation,
924 laarr[curr].extLength =
925 EXT_NOT_RECORDED_NOT_ALLOCATED |
926 (offset << blocksize_bits);
927 laarr[curr].extLocation.logicalBlockNum = 0;
928 laarr[curr].extLocation.
929 partitionReferenceNum = 0;
931 laarr[curr].extLength = (etype << 30) |
932 (offset << blocksize_bits);
938 laarr[curr].extLocation.logicalBlockNum = newblocknum;
939 if (etype == (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))
940 laarr[curr].extLocation.partitionReferenceNum =
941 UDF_I(inode)->i_location.partitionReferenceNum;
942 laarr[curr].extLength = EXT_RECORDED_ALLOCATED |
946 if (blen != offset + 1) {
947 if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30))
948 laarr[curr].extLocation.logicalBlockNum +=
950 laarr[curr].extLength = (etype << 30) |
951 ((blen - (offset + 1)) << blocksize_bits);
958 static void udf_prealloc_extents(struct inode *inode, int c, int lastblock,
959 struct kernel_long_ad laarr[EXTENT_MERGE_SIZE],
962 int start, length = 0, currlength = 0, i;
964 if (*endnum >= (c + 1)) {
970 if ((laarr[c + 1].extLength >> 30) ==
971 (EXT_NOT_RECORDED_ALLOCATED >> 30)) {
973 length = currlength =
974 (((laarr[c + 1].extLength &
975 UDF_EXTENT_LENGTH_MASK) +
976 inode->i_sb->s_blocksize - 1) >>
977 inode->i_sb->s_blocksize_bits);
982 for (i = start + 1; i <= *endnum; i++) {
985 length += UDF_DEFAULT_PREALLOC_BLOCKS;
986 } else if ((laarr[i].extLength >> 30) ==
987 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) {
988 length += (((laarr[i].extLength &
989 UDF_EXTENT_LENGTH_MASK) +
990 inode->i_sb->s_blocksize - 1) >>
991 inode->i_sb->s_blocksize_bits);
997 int next = laarr[start].extLocation.logicalBlockNum +
998 (((laarr[start].extLength & UDF_EXTENT_LENGTH_MASK) +
999 inode->i_sb->s_blocksize - 1) >>
1000 inode->i_sb->s_blocksize_bits);
1001 int numalloc = udf_prealloc_blocks(inode->i_sb, inode,
1002 laarr[start].extLocation.partitionReferenceNum,
1003 next, (UDF_DEFAULT_PREALLOC_BLOCKS > length ?
1004 length : UDF_DEFAULT_PREALLOC_BLOCKS) -
1007 if (start == (c + 1))
1008 laarr[start].extLength +=
1010 inode->i_sb->s_blocksize_bits);
1012 memmove(&laarr[c + 2], &laarr[c + 1],
1013 sizeof(struct long_ad) * (*endnum - (c + 1)));
1015 laarr[c + 1].extLocation.logicalBlockNum = next;
1016 laarr[c + 1].extLocation.partitionReferenceNum =
1017 laarr[c].extLocation.
1018 partitionReferenceNum;
1019 laarr[c + 1].extLength =
1020 EXT_NOT_RECORDED_ALLOCATED |
1022 inode->i_sb->s_blocksize_bits);
1026 for (i = start + 1; numalloc && i < *endnum; i++) {
1027 int elen = ((laarr[i].extLength &
1028 UDF_EXTENT_LENGTH_MASK) +
1029 inode->i_sb->s_blocksize - 1) >>
1030 inode->i_sb->s_blocksize_bits;
1032 if (elen > numalloc) {
1033 laarr[i].extLength -=
1035 inode->i_sb->s_blocksize_bits);
1039 if (*endnum > (i + 1))
1042 sizeof(struct long_ad) *
1043 (*endnum - (i + 1)));
1048 UDF_I(inode)->i_lenExtents +=
1049 numalloc << inode->i_sb->s_blocksize_bits;
1054 static void udf_merge_extents(struct inode *inode,
1055 struct kernel_long_ad laarr[EXTENT_MERGE_SIZE],
1059 unsigned long blocksize = inode->i_sb->s_blocksize;
1060 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits;
1062 for (i = 0; i < (*endnum - 1); i++) {
1063 struct kernel_long_ad *li /*l[i]*/ = &laarr[i];
1064 struct kernel_long_ad *lip1 /*l[i plus 1]*/ = &laarr[i + 1];
1066 if (((li->extLength >> 30) == (lip1->extLength >> 30)) &&
1067 (((li->extLength >> 30) ==
1068 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) ||
1069 ((lip1->extLocation.logicalBlockNum -
1070 li->extLocation.logicalBlockNum) ==
1071 (((li->extLength & UDF_EXTENT_LENGTH_MASK) +
1072 blocksize - 1) >> blocksize_bits)))) {
1074 if (((li->extLength & UDF_EXTENT_LENGTH_MASK) +
1075 (lip1->extLength & UDF_EXTENT_LENGTH_MASK) +
1076 blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) {
1077 lip1->extLength = (lip1->extLength -
1079 UDF_EXTENT_LENGTH_MASK) +
1080 UDF_EXTENT_LENGTH_MASK) &
1082 li->extLength = (li->extLength &
1083 UDF_EXTENT_FLAG_MASK) +
1084 (UDF_EXTENT_LENGTH_MASK + 1) -
1086 lip1->extLocation.logicalBlockNum =
1087 li->extLocation.logicalBlockNum +
1089 UDF_EXTENT_LENGTH_MASK) >>
1092 li->extLength = lip1->extLength +
1094 UDF_EXTENT_LENGTH_MASK) +
1095 blocksize - 1) & ~(blocksize - 1));
1096 if (*endnum > (i + 2))
1097 memmove(&laarr[i + 1], &laarr[i + 2],
1098 sizeof(struct long_ad) *
1099 (*endnum - (i + 2)));
1103 } else if (((li->extLength >> 30) ==
1104 (EXT_NOT_RECORDED_ALLOCATED >> 30)) &&
1105 ((lip1->extLength >> 30) ==
1106 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))) {
1107 udf_free_blocks(inode->i_sb, inode, &li->extLocation, 0,
1109 UDF_EXTENT_LENGTH_MASK) +
1110 blocksize - 1) >> blocksize_bits);
1111 li->extLocation.logicalBlockNum = 0;
1112 li->extLocation.partitionReferenceNum = 0;
1114 if (((li->extLength & UDF_EXTENT_LENGTH_MASK) +
1115 (lip1->extLength & UDF_EXTENT_LENGTH_MASK) +
1116 blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) {
1117 lip1->extLength = (lip1->extLength -
1119 UDF_EXTENT_LENGTH_MASK) +
1120 UDF_EXTENT_LENGTH_MASK) &
1122 li->extLength = (li->extLength &
1123 UDF_EXTENT_FLAG_MASK) +
1124 (UDF_EXTENT_LENGTH_MASK + 1) -
1127 li->extLength = lip1->extLength +
1129 UDF_EXTENT_LENGTH_MASK) +
1130 blocksize - 1) & ~(blocksize - 1));
1131 if (*endnum > (i + 2))
1132 memmove(&laarr[i + 1], &laarr[i + 2],
1133 sizeof(struct long_ad) *
1134 (*endnum - (i + 2)));
1138 } else if ((li->extLength >> 30) ==
1139 (EXT_NOT_RECORDED_ALLOCATED >> 30)) {
1140 udf_free_blocks(inode->i_sb, inode,
1141 &li->extLocation, 0,
1143 UDF_EXTENT_LENGTH_MASK) +
1144 blocksize - 1) >> blocksize_bits);
1145 li->extLocation.logicalBlockNum = 0;
1146 li->extLocation.partitionReferenceNum = 0;
1147 li->extLength = (li->extLength &
1148 UDF_EXTENT_LENGTH_MASK) |
1149 EXT_NOT_RECORDED_NOT_ALLOCATED;
1154 static void udf_update_extents(struct inode *inode,
1155 struct kernel_long_ad laarr[EXTENT_MERGE_SIZE],
1156 int startnum, int endnum,
1157 struct extent_position *epos)
1160 struct kernel_lb_addr tmploc;
1163 if (startnum > endnum) {
1164 for (i = 0; i < (startnum - endnum); i++)
1165 udf_delete_aext(inode, *epos, laarr[i].extLocation,
1166 laarr[i].extLength);
1167 } else if (startnum < endnum) {
1168 for (i = 0; i < (endnum - startnum); i++) {
1169 udf_insert_aext(inode, *epos, laarr[i].extLocation,
1170 laarr[i].extLength);
1171 udf_next_aext(inode, epos, &laarr[i].extLocation,
1172 &laarr[i].extLength, 1);
1177 for (i = start; i < endnum; i++) {
1178 udf_next_aext(inode, epos, &tmploc, &tmplen, 0);
1179 udf_write_aext(inode, epos, &laarr[i].extLocation,
1180 laarr[i].extLength, 1);
1184 struct buffer_head *udf_bread(struct inode *inode, int block,
1185 int create, int *err)
1187 struct buffer_head *bh = NULL;
1189 bh = udf_getblk(inode, block, create, err);
1193 if (buffer_uptodate(bh))
1196 ll_rw_block(READ, 1, &bh);
1199 if (buffer_uptodate(bh))
1207 int udf_setsize(struct inode *inode, loff_t newsize)
1210 struct udf_inode_info *iinfo;
1211 int bsize = 1 << inode->i_blkbits;
1213 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
1214 S_ISLNK(inode->i_mode)))
1216 if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
1219 iinfo = UDF_I(inode);
1220 if (newsize > inode->i_size) {
1221 down_write(&iinfo->i_data_sem);
1222 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
1224 (udf_file_entry_alloc_offset(inode) + newsize)) {
1225 err = udf_expand_file_adinicb(inode);
1228 down_write(&iinfo->i_data_sem);
1230 iinfo->i_lenAlloc = newsize;
1234 err = udf_extend_file(inode, newsize);
1236 up_write(&iinfo->i_data_sem);
1240 truncate_setsize(inode, newsize);
1241 up_write(&iinfo->i_data_sem);
1243 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
1244 down_write(&iinfo->i_data_sem);
1245 udf_clear_extent_cache(inode);
1246 memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr + newsize,
1247 0x00, bsize - newsize -
1248 udf_file_entry_alloc_offset(inode));
1249 iinfo->i_lenAlloc = newsize;
1250 truncate_setsize(inode, newsize);
1251 up_write(&iinfo->i_data_sem);
1254 err = block_truncate_page(inode->i_mapping, newsize,
1258 down_write(&iinfo->i_data_sem);
1259 udf_clear_extent_cache(inode);
1260 truncate_setsize(inode, newsize);
1261 udf_truncate_extents(inode);
1262 up_write(&iinfo->i_data_sem);
1265 inode->i_mtime = inode->i_ctime = current_fs_time(inode->i_sb);
1267 udf_sync_inode(inode);
1269 mark_inode_dirty(inode);
1274 * Maximum length of linked list formed by ICB hierarchy. The chosen number is
1275 * arbitrary - just that we hopefully don't limit any real use of rewritten
1276 * inode on write-once media but avoid looping for too long on corrupted media.
1278 #define UDF_MAX_ICB_NESTING 1024
1280 static void __udf_read_inode(struct inode *inode)
1282 struct buffer_head *bh = NULL;
1283 struct fileEntry *fe;
1285 struct udf_inode_info *iinfo = UDF_I(inode);
1286 unsigned int indirections = 0;
1290 * Set defaults, but the inode is still incomplete!
1291 * Note: get_new_inode() sets the following on a new inode:
1294 * i_flags = sb->s_flags
1296 * clean_inode(): zero fills and sets
1301 bh = udf_read_ptagged(inode->i_sb, &iinfo->i_location, 0, &ident);
1303 udf_err(inode->i_sb, "(ino %ld) failed !bh\n", inode->i_ino);
1304 make_bad_inode(inode);
1308 if (ident != TAG_IDENT_FE && ident != TAG_IDENT_EFE &&
1309 ident != TAG_IDENT_USE) {
1310 udf_err(inode->i_sb, "(ino %ld) failed ident=%d\n",
1311 inode->i_ino, ident);
1313 make_bad_inode(inode);
1317 fe = (struct fileEntry *)bh->b_data;
1319 if (fe->icbTag.strategyType == cpu_to_le16(4096)) {
1320 struct buffer_head *ibh;
1322 ibh = udf_read_ptagged(inode->i_sb, &iinfo->i_location, 1,
1324 if (ident == TAG_IDENT_IE && ibh) {
1325 struct kernel_lb_addr loc;
1326 struct indirectEntry *ie;
1328 ie = (struct indirectEntry *)ibh->b_data;
1329 loc = lelb_to_cpu(ie->indirectICB.extLocation);
1331 if (ie->indirectICB.extLength) {
1334 memcpy(&iinfo->i_location, &loc,
1335 sizeof(struct kernel_lb_addr));
1336 if (++indirections > UDF_MAX_ICB_NESTING) {
1337 udf_err(inode->i_sb,
1338 "too many ICBs in ICB hierarchy"
1339 " (max %d supported)\n",
1340 UDF_MAX_ICB_NESTING);
1341 make_bad_inode(inode);
1348 } else if (fe->icbTag.strategyType != cpu_to_le16(4)) {
1349 udf_err(inode->i_sb, "unsupported strategy type: %d\n",
1350 le16_to_cpu(fe->icbTag.strategyType));
1352 make_bad_inode(inode);
1355 udf_fill_inode(inode, bh);
1360 static void udf_fill_inode(struct inode *inode, struct buffer_head *bh)
1362 struct fileEntry *fe;
1363 struct extendedFileEntry *efe;
1364 struct udf_sb_info *sbi = UDF_SB(inode->i_sb);
1365 struct udf_inode_info *iinfo = UDF_I(inode);
1366 unsigned int link_count;
1368 fe = (struct fileEntry *)bh->b_data;
1369 efe = (struct extendedFileEntry *)bh->b_data;
1371 if (fe->icbTag.strategyType == cpu_to_le16(4))
1372 iinfo->i_strat4096 = 0;
1373 else /* if (fe->icbTag.strategyType == cpu_to_le16(4096)) */
1374 iinfo->i_strat4096 = 1;
1376 iinfo->i_alloc_type = le16_to_cpu(fe->icbTag.flags) &
1377 ICBTAG_FLAG_AD_MASK;
1378 iinfo->i_unique = 0;
1379 iinfo->i_lenEAttr = 0;
1380 iinfo->i_lenExtents = 0;
1381 iinfo->i_lenAlloc = 0;
1382 iinfo->i_next_alloc_block = 0;
1383 iinfo->i_next_alloc_goal = 0;
1384 if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_EFE)) {
1387 if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize -
1388 sizeof(struct extendedFileEntry))) {
1389 make_bad_inode(inode);
1392 memcpy(iinfo->i_ext.i_data,
1393 bh->b_data + sizeof(struct extendedFileEntry),
1394 inode->i_sb->s_blocksize -
1395 sizeof(struct extendedFileEntry));
1396 } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_FE)) {
1399 if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize -
1400 sizeof(struct fileEntry))) {
1401 make_bad_inode(inode);
1404 memcpy(iinfo->i_ext.i_data,
1405 bh->b_data + sizeof(struct fileEntry),
1406 inode->i_sb->s_blocksize - sizeof(struct fileEntry));
1407 } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_USE)) {
1410 iinfo->i_lenAlloc = le32_to_cpu(
1411 ((struct unallocSpaceEntry *)bh->b_data)->
1413 if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize -
1414 sizeof(struct unallocSpaceEntry))) {
1415 make_bad_inode(inode);
1418 memcpy(iinfo->i_ext.i_data,
1419 bh->b_data + sizeof(struct unallocSpaceEntry),
1420 inode->i_sb->s_blocksize -
1421 sizeof(struct unallocSpaceEntry));
1425 read_lock(&sbi->s_cred_lock);
1426 i_uid_write(inode, le32_to_cpu(fe->uid));
1427 if (!uid_valid(inode->i_uid) ||
1428 UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_IGNORE) ||
1429 UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_SET))
1430 inode->i_uid = UDF_SB(inode->i_sb)->s_uid;
1432 i_gid_write(inode, le32_to_cpu(fe->gid));
1433 if (!gid_valid(inode->i_gid) ||
1434 UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_IGNORE) ||
1435 UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_SET))
1436 inode->i_gid = UDF_SB(inode->i_sb)->s_gid;
1438 if (fe->icbTag.fileType != ICBTAG_FILE_TYPE_DIRECTORY &&
1439 sbi->s_fmode != UDF_INVALID_MODE)
1440 inode->i_mode = sbi->s_fmode;
1441 else if (fe->icbTag.fileType == ICBTAG_FILE_TYPE_DIRECTORY &&
1442 sbi->s_dmode != UDF_INVALID_MODE)
1443 inode->i_mode = sbi->s_dmode;
1445 inode->i_mode = udf_convert_permissions(fe);
1446 inode->i_mode &= ~sbi->s_umask;
1447 read_unlock(&sbi->s_cred_lock);
1449 link_count = le16_to_cpu(fe->fileLinkCount);
1452 set_nlink(inode, link_count);
1454 inode->i_size = le64_to_cpu(fe->informationLength);
1455 iinfo->i_lenExtents = inode->i_size;
1457 if (iinfo->i_efe == 0) {
1458 inode->i_blocks = le64_to_cpu(fe->logicalBlocksRecorded) <<
1459 (inode->i_sb->s_blocksize_bits - 9);
1461 if (!udf_disk_stamp_to_time(&inode->i_atime, fe->accessTime))
1462 inode->i_atime = sbi->s_record_time;
1464 if (!udf_disk_stamp_to_time(&inode->i_mtime,
1465 fe->modificationTime))
1466 inode->i_mtime = sbi->s_record_time;
1468 if (!udf_disk_stamp_to_time(&inode->i_ctime, fe->attrTime))
1469 inode->i_ctime = sbi->s_record_time;
1471 iinfo->i_unique = le64_to_cpu(fe->uniqueID);
1472 iinfo->i_lenEAttr = le32_to_cpu(fe->lengthExtendedAttr);
1473 iinfo->i_lenAlloc = le32_to_cpu(fe->lengthAllocDescs);
1474 iinfo->i_checkpoint = le32_to_cpu(fe->checkpoint);
1476 inode->i_blocks = le64_to_cpu(efe->logicalBlocksRecorded) <<
1477 (inode->i_sb->s_blocksize_bits - 9);
1479 if (!udf_disk_stamp_to_time(&inode->i_atime, efe->accessTime))
1480 inode->i_atime = sbi->s_record_time;
1482 if (!udf_disk_stamp_to_time(&inode->i_mtime,
1483 efe->modificationTime))
1484 inode->i_mtime = sbi->s_record_time;
1486 if (!udf_disk_stamp_to_time(&iinfo->i_crtime, efe->createTime))
1487 iinfo->i_crtime = sbi->s_record_time;
1489 if (!udf_disk_stamp_to_time(&inode->i_ctime, efe->attrTime))
1490 inode->i_ctime = sbi->s_record_time;
1492 iinfo->i_unique = le64_to_cpu(efe->uniqueID);
1493 iinfo->i_lenEAttr = le32_to_cpu(efe->lengthExtendedAttr);
1494 iinfo->i_lenAlloc = le32_to_cpu(efe->lengthAllocDescs);
1495 iinfo->i_checkpoint = le32_to_cpu(efe->checkpoint);
1498 switch (fe->icbTag.fileType) {
1499 case ICBTAG_FILE_TYPE_DIRECTORY:
1500 inode->i_op = &udf_dir_inode_operations;
1501 inode->i_fop = &udf_dir_operations;
1502 inode->i_mode |= S_IFDIR;
1505 case ICBTAG_FILE_TYPE_REALTIME:
1506 case ICBTAG_FILE_TYPE_REGULAR:
1507 case ICBTAG_FILE_TYPE_UNDEF:
1508 case ICBTAG_FILE_TYPE_VAT20:
1509 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
1510 inode->i_data.a_ops = &udf_adinicb_aops;
1512 inode->i_data.a_ops = &udf_aops;
1513 inode->i_op = &udf_file_inode_operations;
1514 inode->i_fop = &udf_file_operations;
1515 inode->i_mode |= S_IFREG;
1517 case ICBTAG_FILE_TYPE_BLOCK:
1518 inode->i_mode |= S_IFBLK;
1520 case ICBTAG_FILE_TYPE_CHAR:
1521 inode->i_mode |= S_IFCHR;
1523 case ICBTAG_FILE_TYPE_FIFO:
1524 init_special_inode(inode, inode->i_mode | S_IFIFO, 0);
1526 case ICBTAG_FILE_TYPE_SOCKET:
1527 init_special_inode(inode, inode->i_mode | S_IFSOCK, 0);
1529 case ICBTAG_FILE_TYPE_SYMLINK:
1530 inode->i_data.a_ops = &udf_symlink_aops;
1531 inode->i_op = &udf_symlink_inode_operations;
1532 inode->i_mode = S_IFLNK | S_IRWXUGO;
1534 case ICBTAG_FILE_TYPE_MAIN:
1535 udf_debug("METADATA FILE-----\n");
1537 case ICBTAG_FILE_TYPE_MIRROR:
1538 udf_debug("METADATA MIRROR FILE-----\n");
1540 case ICBTAG_FILE_TYPE_BITMAP:
1541 udf_debug("METADATA BITMAP FILE-----\n");
1544 udf_err(inode->i_sb, "(ino %ld) failed unknown file type=%d\n",
1545 inode->i_ino, fe->icbTag.fileType);
1546 make_bad_inode(inode);
1549 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
1550 struct deviceSpec *dsea =
1551 (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1);
1553 init_special_inode(inode, inode->i_mode,
1554 MKDEV(le32_to_cpu(dsea->majorDeviceIdent),
1555 le32_to_cpu(dsea->minorDeviceIdent)));
1556 /* Developer ID ??? */
1558 make_bad_inode(inode);
1562 static int udf_alloc_i_data(struct inode *inode, size_t size)
1564 struct udf_inode_info *iinfo = UDF_I(inode);
1565 iinfo->i_ext.i_data = kmalloc(size, GFP_KERNEL);
1567 if (!iinfo->i_ext.i_data) {
1568 udf_err(inode->i_sb, "(ino %ld) no free memory\n",
1576 static umode_t udf_convert_permissions(struct fileEntry *fe)
1579 uint32_t permissions;
1582 permissions = le32_to_cpu(fe->permissions);
1583 flags = le16_to_cpu(fe->icbTag.flags);
1585 mode = ((permissions) & S_IRWXO) |
1586 ((permissions >> 2) & S_IRWXG) |
1587 ((permissions >> 4) & S_IRWXU) |
1588 ((flags & ICBTAG_FLAG_SETUID) ? S_ISUID : 0) |
1589 ((flags & ICBTAG_FLAG_SETGID) ? S_ISGID : 0) |
1590 ((flags & ICBTAG_FLAG_STICKY) ? S_ISVTX : 0);
1595 int udf_write_inode(struct inode *inode, struct writeback_control *wbc)
1597 return udf_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL);
1600 static int udf_sync_inode(struct inode *inode)
1602 return udf_update_inode(inode, 1);
1605 static int udf_update_inode(struct inode *inode, int do_sync)
1607 struct buffer_head *bh = NULL;
1608 struct fileEntry *fe;
1609 struct extendedFileEntry *efe;
1610 uint64_t lb_recorded;
1615 struct udf_sb_info *sbi = UDF_SB(inode->i_sb);
1616 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits;
1617 struct udf_inode_info *iinfo = UDF_I(inode);
1619 bh = udf_tgetblk(inode->i_sb,
1620 udf_get_lb_pblock(inode->i_sb, &iinfo->i_location, 0));
1622 udf_debug("getblk failure\n");
1627 memset(bh->b_data, 0, inode->i_sb->s_blocksize);
1628 fe = (struct fileEntry *)bh->b_data;
1629 efe = (struct extendedFileEntry *)bh->b_data;
1632 struct unallocSpaceEntry *use =
1633 (struct unallocSpaceEntry *)bh->b_data;
1635 use->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc);
1636 memcpy(bh->b_data + sizeof(struct unallocSpaceEntry),
1637 iinfo->i_ext.i_data, inode->i_sb->s_blocksize -
1638 sizeof(struct unallocSpaceEntry));
1639 use->descTag.tagIdent = cpu_to_le16(TAG_IDENT_USE);
1640 use->descTag.tagLocation =
1641 cpu_to_le32(iinfo->i_location.logicalBlockNum);
1642 crclen = sizeof(struct unallocSpaceEntry) +
1643 iinfo->i_lenAlloc - sizeof(struct tag);
1644 use->descTag.descCRCLength = cpu_to_le16(crclen);
1645 use->descTag.descCRC = cpu_to_le16(crc_itu_t(0, (char *)use +
1648 use->descTag.tagChecksum = udf_tag_checksum(&use->descTag);
1653 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_FORGET))
1654 fe->uid = cpu_to_le32(-1);
1656 fe->uid = cpu_to_le32(i_uid_read(inode));
1658 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_FORGET))
1659 fe->gid = cpu_to_le32(-1);
1661 fe->gid = cpu_to_le32(i_gid_read(inode));
1663 udfperms = ((inode->i_mode & S_IRWXO)) |
1664 ((inode->i_mode & S_IRWXG) << 2) |
1665 ((inode->i_mode & S_IRWXU) << 4);
1667 udfperms |= (le32_to_cpu(fe->permissions) &
1668 (FE_PERM_O_DELETE | FE_PERM_O_CHATTR |
1669 FE_PERM_G_DELETE | FE_PERM_G_CHATTR |
1670 FE_PERM_U_DELETE | FE_PERM_U_CHATTR));
1671 fe->permissions = cpu_to_le32(udfperms);
1673 if (S_ISDIR(inode->i_mode))
1674 fe->fileLinkCount = cpu_to_le16(inode->i_nlink - 1);
1676 fe->fileLinkCount = cpu_to_le16(inode->i_nlink);
1678 fe->informationLength = cpu_to_le64(inode->i_size);
1680 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
1682 struct deviceSpec *dsea =
1683 (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1);
1685 dsea = (struct deviceSpec *)
1686 udf_add_extendedattr(inode,
1687 sizeof(struct deviceSpec) +
1688 sizeof(struct regid), 12, 0x3);
1689 dsea->attrType = cpu_to_le32(12);
1690 dsea->attrSubtype = 1;
1691 dsea->attrLength = cpu_to_le32(
1692 sizeof(struct deviceSpec) +
1693 sizeof(struct regid));
1694 dsea->impUseLength = cpu_to_le32(sizeof(struct regid));
1696 eid = (struct regid *)dsea->impUse;
1697 memset(eid, 0, sizeof(struct regid));
1698 strcpy(eid->ident, UDF_ID_DEVELOPER);
1699 eid->identSuffix[0] = UDF_OS_CLASS_UNIX;
1700 eid->identSuffix[1] = UDF_OS_ID_LINUX;
1701 dsea->majorDeviceIdent = cpu_to_le32(imajor(inode));
1702 dsea->minorDeviceIdent = cpu_to_le32(iminor(inode));
1705 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
1706 lb_recorded = 0; /* No extents => no blocks! */
1709 (inode->i_blocks + (1 << (blocksize_bits - 9)) - 1) >>
1710 (blocksize_bits - 9);
1712 if (iinfo->i_efe == 0) {
1713 memcpy(bh->b_data + sizeof(struct fileEntry),
1714 iinfo->i_ext.i_data,
1715 inode->i_sb->s_blocksize - sizeof(struct fileEntry));
1716 fe->logicalBlocksRecorded = cpu_to_le64(lb_recorded);
1718 udf_time_to_disk_stamp(&fe->accessTime, inode->i_atime);
1719 udf_time_to_disk_stamp(&fe->modificationTime, inode->i_mtime);
1720 udf_time_to_disk_stamp(&fe->attrTime, inode->i_ctime);
1721 memset(&(fe->impIdent), 0, sizeof(struct regid));
1722 strcpy(fe->impIdent.ident, UDF_ID_DEVELOPER);
1723 fe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1724 fe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1725 fe->uniqueID = cpu_to_le64(iinfo->i_unique);
1726 fe->lengthExtendedAttr = cpu_to_le32(iinfo->i_lenEAttr);
1727 fe->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc);
1728 fe->checkpoint = cpu_to_le32(iinfo->i_checkpoint);
1729 fe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_FE);
1730 crclen = sizeof(struct fileEntry);
1732 memcpy(bh->b_data + sizeof(struct extendedFileEntry),
1733 iinfo->i_ext.i_data,
1734 inode->i_sb->s_blocksize -
1735 sizeof(struct extendedFileEntry));
1736 efe->objectSize = cpu_to_le64(inode->i_size);
1737 efe->logicalBlocksRecorded = cpu_to_le64(lb_recorded);
1739 if (iinfo->i_crtime.tv_sec > inode->i_atime.tv_sec ||
1740 (iinfo->i_crtime.tv_sec == inode->i_atime.tv_sec &&
1741 iinfo->i_crtime.tv_nsec > inode->i_atime.tv_nsec))
1742 iinfo->i_crtime = inode->i_atime;
1744 if (iinfo->i_crtime.tv_sec > inode->i_mtime.tv_sec ||
1745 (iinfo->i_crtime.tv_sec == inode->i_mtime.tv_sec &&
1746 iinfo->i_crtime.tv_nsec > inode->i_mtime.tv_nsec))
1747 iinfo->i_crtime = inode->i_mtime;
1749 if (iinfo->i_crtime.tv_sec > inode->i_ctime.tv_sec ||
1750 (iinfo->i_crtime.tv_sec == inode->i_ctime.tv_sec &&
1751 iinfo->i_crtime.tv_nsec > inode->i_ctime.tv_nsec))
1752 iinfo->i_crtime = inode->i_ctime;
1754 udf_time_to_disk_stamp(&efe->accessTime, inode->i_atime);
1755 udf_time_to_disk_stamp(&efe->modificationTime, inode->i_mtime);
1756 udf_time_to_disk_stamp(&efe->createTime, iinfo->i_crtime);
1757 udf_time_to_disk_stamp(&efe->attrTime, inode->i_ctime);
1759 memset(&(efe->impIdent), 0, sizeof(struct regid));
1760 strcpy(efe->impIdent.ident, UDF_ID_DEVELOPER);
1761 efe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1762 efe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1763 efe->uniqueID = cpu_to_le64(iinfo->i_unique);
1764 efe->lengthExtendedAttr = cpu_to_le32(iinfo->i_lenEAttr);
1765 efe->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc);
1766 efe->checkpoint = cpu_to_le32(iinfo->i_checkpoint);
1767 efe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_EFE);
1768 crclen = sizeof(struct extendedFileEntry);
1770 if (iinfo->i_strat4096) {
1771 fe->icbTag.strategyType = cpu_to_le16(4096);
1772 fe->icbTag.strategyParameter = cpu_to_le16(1);
1773 fe->icbTag.numEntries = cpu_to_le16(2);
1775 fe->icbTag.strategyType = cpu_to_le16(4);
1776 fe->icbTag.numEntries = cpu_to_le16(1);
1779 if (S_ISDIR(inode->i_mode))
1780 fe->icbTag.fileType = ICBTAG_FILE_TYPE_DIRECTORY;
1781 else if (S_ISREG(inode->i_mode))
1782 fe->icbTag.fileType = ICBTAG_FILE_TYPE_REGULAR;
1783 else if (S_ISLNK(inode->i_mode))
1784 fe->icbTag.fileType = ICBTAG_FILE_TYPE_SYMLINK;
1785 else if (S_ISBLK(inode->i_mode))
1786 fe->icbTag.fileType = ICBTAG_FILE_TYPE_BLOCK;
1787 else if (S_ISCHR(inode->i_mode))
1788 fe->icbTag.fileType = ICBTAG_FILE_TYPE_CHAR;
1789 else if (S_ISFIFO(inode->i_mode))
1790 fe->icbTag.fileType = ICBTAG_FILE_TYPE_FIFO;
1791 else if (S_ISSOCK(inode->i_mode))
1792 fe->icbTag.fileType = ICBTAG_FILE_TYPE_SOCKET;
1794 icbflags = iinfo->i_alloc_type |
1795 ((inode->i_mode & S_ISUID) ? ICBTAG_FLAG_SETUID : 0) |
1796 ((inode->i_mode & S_ISGID) ? ICBTAG_FLAG_SETGID : 0) |
1797 ((inode->i_mode & S_ISVTX) ? ICBTAG_FLAG_STICKY : 0) |
1798 (le16_to_cpu(fe->icbTag.flags) &
1799 ~(ICBTAG_FLAG_AD_MASK | ICBTAG_FLAG_SETUID |
1800 ICBTAG_FLAG_SETGID | ICBTAG_FLAG_STICKY));
1802 fe->icbTag.flags = cpu_to_le16(icbflags);
1803 if (sbi->s_udfrev >= 0x0200)
1804 fe->descTag.descVersion = cpu_to_le16(3);
1806 fe->descTag.descVersion = cpu_to_le16(2);
1807 fe->descTag.tagSerialNum = cpu_to_le16(sbi->s_serial_number);
1808 fe->descTag.tagLocation = cpu_to_le32(
1809 iinfo->i_location.logicalBlockNum);
1810 crclen += iinfo->i_lenEAttr + iinfo->i_lenAlloc - sizeof(struct tag);
1811 fe->descTag.descCRCLength = cpu_to_le16(crclen);
1812 fe->descTag.descCRC = cpu_to_le16(crc_itu_t(0, (char *)fe + sizeof(struct tag),
1814 fe->descTag.tagChecksum = udf_tag_checksum(&fe->descTag);
1817 set_buffer_uptodate(bh);
1820 /* write the data blocks */
1821 mark_buffer_dirty(bh);
1823 sync_dirty_buffer(bh);
1824 if (buffer_write_io_error(bh)) {
1825 udf_warn(inode->i_sb, "IO error syncing udf inode [%08lx]\n",
1835 struct inode *udf_iget(struct super_block *sb, struct kernel_lb_addr *ino)
1837 unsigned long block = udf_get_lb_pblock(sb, ino, 0);
1838 struct inode *inode = iget_locked(sb, block);
1843 if (inode->i_state & I_NEW) {
1844 memcpy(&UDF_I(inode)->i_location, ino, sizeof(struct kernel_lb_addr));
1845 __udf_read_inode(inode);
1846 unlock_new_inode(inode);
1849 if (is_bad_inode(inode))
1852 if (ino->logicalBlockNum >= UDF_SB(sb)->
1853 s_partmaps[ino->partitionReferenceNum].s_partition_len) {
1854 udf_debug("block=%d, partition=%d out of range\n",
1855 ino->logicalBlockNum, ino->partitionReferenceNum);
1856 make_bad_inode(inode);
1867 int udf_add_aext(struct inode *inode, struct extent_position *epos,
1868 struct kernel_lb_addr *eloc, uint32_t elen, int inc)
1871 struct short_ad *sad = NULL;
1872 struct long_ad *lad = NULL;
1873 struct allocExtDesc *aed;
1875 struct udf_inode_info *iinfo = UDF_I(inode);
1878 ptr = iinfo->i_ext.i_data + epos->offset -
1879 udf_file_entry_alloc_offset(inode) +
1882 ptr = epos->bh->b_data + epos->offset;
1884 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
1885 adsize = sizeof(struct short_ad);
1886 else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
1887 adsize = sizeof(struct long_ad);
1891 if (epos->offset + (2 * adsize) > inode->i_sb->s_blocksize) {
1892 unsigned char *sptr, *dptr;
1893 struct buffer_head *nbh;
1895 struct kernel_lb_addr obloc = epos->block;
1897 epos->block.logicalBlockNum = udf_new_block(inode->i_sb, NULL,
1898 obloc.partitionReferenceNum,
1899 obloc.logicalBlockNum, &err);
1900 if (!epos->block.logicalBlockNum)
1902 nbh = udf_tgetblk(inode->i_sb, udf_get_lb_pblock(inode->i_sb,
1908 memset(nbh->b_data, 0x00, inode->i_sb->s_blocksize);
1909 set_buffer_uptodate(nbh);
1911 mark_buffer_dirty_inode(nbh, inode);
1913 aed = (struct allocExtDesc *)(nbh->b_data);
1914 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT))
1915 aed->previousAllocExtLocation =
1916 cpu_to_le32(obloc.logicalBlockNum);
1917 if (epos->offset + adsize > inode->i_sb->s_blocksize) {
1918 loffset = epos->offset;
1919 aed->lengthAllocDescs = cpu_to_le32(adsize);
1920 sptr = ptr - adsize;
1921 dptr = nbh->b_data + sizeof(struct allocExtDesc);
1922 memcpy(dptr, sptr, adsize);
1923 epos->offset = sizeof(struct allocExtDesc) + adsize;
1925 loffset = epos->offset + adsize;
1926 aed->lengthAllocDescs = cpu_to_le32(0);
1928 epos->offset = sizeof(struct allocExtDesc);
1931 aed = (struct allocExtDesc *)epos->bh->b_data;
1932 le32_add_cpu(&aed->lengthAllocDescs, adsize);
1934 iinfo->i_lenAlloc += adsize;
1935 mark_inode_dirty(inode);
1938 if (UDF_SB(inode->i_sb)->s_udfrev >= 0x0200)
1939 udf_new_tag(nbh->b_data, TAG_IDENT_AED, 3, 1,
1940 epos->block.logicalBlockNum, sizeof(struct tag));
1942 udf_new_tag(nbh->b_data, TAG_IDENT_AED, 2, 1,
1943 epos->block.logicalBlockNum, sizeof(struct tag));
1944 switch (iinfo->i_alloc_type) {
1945 case ICBTAG_FLAG_AD_SHORT:
1946 sad = (struct short_ad *)sptr;
1947 sad->extLength = cpu_to_le32(EXT_NEXT_EXTENT_ALLOCDECS |
1948 inode->i_sb->s_blocksize);
1950 cpu_to_le32(epos->block.logicalBlockNum);
1952 case ICBTAG_FLAG_AD_LONG:
1953 lad = (struct long_ad *)sptr;
1954 lad->extLength = cpu_to_le32(EXT_NEXT_EXTENT_ALLOCDECS |
1955 inode->i_sb->s_blocksize);
1956 lad->extLocation = cpu_to_lelb(epos->block);
1957 memset(lad->impUse, 0x00, sizeof(lad->impUse));
1961 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
1962 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201)
1963 udf_update_tag(epos->bh->b_data, loffset);
1965 udf_update_tag(epos->bh->b_data,
1966 sizeof(struct allocExtDesc));
1967 mark_buffer_dirty_inode(epos->bh, inode);
1970 mark_inode_dirty(inode);
1975 udf_write_aext(inode, epos, eloc, elen, inc);
1978 iinfo->i_lenAlloc += adsize;
1979 mark_inode_dirty(inode);
1981 aed = (struct allocExtDesc *)epos->bh->b_data;
1982 le32_add_cpu(&aed->lengthAllocDescs, adsize);
1983 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
1984 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201)
1985 udf_update_tag(epos->bh->b_data,
1986 epos->offset + (inc ? 0 : adsize));
1988 udf_update_tag(epos->bh->b_data,
1989 sizeof(struct allocExtDesc));
1990 mark_buffer_dirty_inode(epos->bh, inode);
1996 void udf_write_aext(struct inode *inode, struct extent_position *epos,
1997 struct kernel_lb_addr *eloc, uint32_t elen, int inc)
2001 struct short_ad *sad;
2002 struct long_ad *lad;
2003 struct udf_inode_info *iinfo = UDF_I(inode);
2006 ptr = iinfo->i_ext.i_data + epos->offset -
2007 udf_file_entry_alloc_offset(inode) +
2010 ptr = epos->bh->b_data + epos->offset;
2012 switch (iinfo->i_alloc_type) {
2013 case ICBTAG_FLAG_AD_SHORT:
2014 sad = (struct short_ad *)ptr;
2015 sad->extLength = cpu_to_le32(elen);
2016 sad->extPosition = cpu_to_le32(eloc->logicalBlockNum);
2017 adsize = sizeof(struct short_ad);
2019 case ICBTAG_FLAG_AD_LONG:
2020 lad = (struct long_ad *)ptr;
2021 lad->extLength = cpu_to_le32(elen);
2022 lad->extLocation = cpu_to_lelb(*eloc);
2023 memset(lad->impUse, 0x00, sizeof(lad->impUse));
2024 adsize = sizeof(struct long_ad);
2031 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
2032 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) {
2033 struct allocExtDesc *aed =
2034 (struct allocExtDesc *)epos->bh->b_data;
2035 udf_update_tag(epos->bh->b_data,
2036 le32_to_cpu(aed->lengthAllocDescs) +
2037 sizeof(struct allocExtDesc));
2039 mark_buffer_dirty_inode(epos->bh, inode);
2041 mark_inode_dirty(inode);
2045 epos->offset += adsize;
2048 int8_t udf_next_aext(struct inode *inode, struct extent_position *epos,
2049 struct kernel_lb_addr *eloc, uint32_t *elen, int inc)
2053 while ((etype = udf_current_aext(inode, epos, eloc, elen, inc)) ==
2054 (EXT_NEXT_EXTENT_ALLOCDECS >> 30)) {
2056 epos->block = *eloc;
2057 epos->offset = sizeof(struct allocExtDesc);
2059 block = udf_get_lb_pblock(inode->i_sb, &epos->block, 0);
2060 epos->bh = udf_tread(inode->i_sb, block);
2062 udf_debug("reading block %d failed!\n", block);
2070 int8_t udf_current_aext(struct inode *inode, struct extent_position *epos,
2071 struct kernel_lb_addr *eloc, uint32_t *elen, int inc)
2076 struct short_ad *sad;
2077 struct long_ad *lad;
2078 struct udf_inode_info *iinfo = UDF_I(inode);
2082 epos->offset = udf_file_entry_alloc_offset(inode);
2083 ptr = iinfo->i_ext.i_data + epos->offset -
2084 udf_file_entry_alloc_offset(inode) +
2086 alen = udf_file_entry_alloc_offset(inode) +
2090 epos->offset = sizeof(struct allocExtDesc);
2091 ptr = epos->bh->b_data + epos->offset;
2092 alen = sizeof(struct allocExtDesc) +
2093 le32_to_cpu(((struct allocExtDesc *)epos->bh->b_data)->
2097 switch (iinfo->i_alloc_type) {
2098 case ICBTAG_FLAG_AD_SHORT:
2099 sad = udf_get_fileshortad(ptr, alen, &epos->offset, inc);
2102 etype = le32_to_cpu(sad->extLength) >> 30;
2103 eloc->logicalBlockNum = le32_to_cpu(sad->extPosition);
2104 eloc->partitionReferenceNum =
2105 iinfo->i_location.partitionReferenceNum;
2106 *elen = le32_to_cpu(sad->extLength) & UDF_EXTENT_LENGTH_MASK;
2108 case ICBTAG_FLAG_AD_LONG:
2109 lad = udf_get_filelongad(ptr, alen, &epos->offset, inc);
2112 etype = le32_to_cpu(lad->extLength) >> 30;
2113 *eloc = lelb_to_cpu(lad->extLocation);
2114 *elen = le32_to_cpu(lad->extLength) & UDF_EXTENT_LENGTH_MASK;
2117 udf_debug("alloc_type = %d unsupported\n", iinfo->i_alloc_type);
2124 static int8_t udf_insert_aext(struct inode *inode, struct extent_position epos,
2125 struct kernel_lb_addr neloc, uint32_t nelen)
2127 struct kernel_lb_addr oeloc;
2134 while ((etype = udf_next_aext(inode, &epos, &oeloc, &oelen, 0)) != -1) {
2135 udf_write_aext(inode, &epos, &neloc, nelen, 1);
2137 nelen = (etype << 30) | oelen;
2139 udf_add_aext(inode, &epos, &neloc, nelen, 1);
2142 return (nelen >> 30);
2145 int8_t udf_delete_aext(struct inode *inode, struct extent_position epos,
2146 struct kernel_lb_addr eloc, uint32_t elen)
2148 struct extent_position oepos;
2151 struct allocExtDesc *aed;
2152 struct udf_inode_info *iinfo;
2159 iinfo = UDF_I(inode);
2160 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
2161 adsize = sizeof(struct short_ad);
2162 else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
2163 adsize = sizeof(struct long_ad);
2168 if (udf_next_aext(inode, &epos, &eloc, &elen, 1) == -1)
2171 while ((etype = udf_next_aext(inode, &epos, &eloc, &elen, 1)) != -1) {
2172 udf_write_aext(inode, &oepos, &eloc, (etype << 30) | elen, 1);
2173 if (oepos.bh != epos.bh) {
2174 oepos.block = epos.block;
2178 oepos.offset = epos.offset - adsize;
2181 memset(&eloc, 0x00, sizeof(struct kernel_lb_addr));
2184 if (epos.bh != oepos.bh) {
2185 udf_free_blocks(inode->i_sb, inode, &epos.block, 0, 1);
2186 udf_write_aext(inode, &oepos, &eloc, elen, 1);
2187 udf_write_aext(inode, &oepos, &eloc, elen, 1);
2189 iinfo->i_lenAlloc -= (adsize * 2);
2190 mark_inode_dirty(inode);
2192 aed = (struct allocExtDesc *)oepos.bh->b_data;
2193 le32_add_cpu(&aed->lengthAllocDescs, -(2 * adsize));
2194 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
2195 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201)
2196 udf_update_tag(oepos.bh->b_data,
2197 oepos.offset - (2 * adsize));
2199 udf_update_tag(oepos.bh->b_data,
2200 sizeof(struct allocExtDesc));
2201 mark_buffer_dirty_inode(oepos.bh, inode);
2204 udf_write_aext(inode, &oepos, &eloc, elen, 1);
2206 iinfo->i_lenAlloc -= adsize;
2207 mark_inode_dirty(inode);
2209 aed = (struct allocExtDesc *)oepos.bh->b_data;
2210 le32_add_cpu(&aed->lengthAllocDescs, -adsize);
2211 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
2212 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201)
2213 udf_update_tag(oepos.bh->b_data,
2214 epos.offset - adsize);
2216 udf_update_tag(oepos.bh->b_data,
2217 sizeof(struct allocExtDesc));
2218 mark_buffer_dirty_inode(oepos.bh, inode);
2225 return (elen >> 30);
2228 int8_t inode_bmap(struct inode *inode, sector_t block,
2229 struct extent_position *pos, struct kernel_lb_addr *eloc,
2230 uint32_t *elen, sector_t *offset)
2232 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits;
2233 loff_t lbcount = 0, bcount =
2234 (loff_t) block << blocksize_bits;
2236 struct udf_inode_info *iinfo;
2238 iinfo = UDF_I(inode);
2239 if (!udf_read_extent_cache(inode, bcount, &lbcount, pos)) {
2241 pos->block = iinfo->i_location;
2246 etype = udf_next_aext(inode, pos, eloc, elen, 1);
2248 *offset = (bcount - lbcount) >> blocksize_bits;
2249 iinfo->i_lenExtents = lbcount;
2253 } while (lbcount <= bcount);
2254 /* update extent cache */
2255 udf_update_extent_cache(inode, lbcount - *elen, pos, 1);
2256 *offset = (bcount + *elen - lbcount) >> blocksize_bits;
2261 long udf_block_map(struct inode *inode, sector_t block)
2263 struct kernel_lb_addr eloc;
2266 struct extent_position epos = {};
2269 down_read(&UDF_I(inode)->i_data_sem);
2271 if (inode_bmap(inode, block, &epos, &eloc, &elen, &offset) ==
2272 (EXT_RECORDED_ALLOCATED >> 30))
2273 ret = udf_get_lb_pblock(inode->i_sb, &eloc, offset);
2277 up_read(&UDF_I(inode)->i_data_sem);
2280 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_VARCONV))
2281 return udf_fixed_to_variable(ret);