Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * inode.c | |
3 | * | |
4 | * PURPOSE | |
5 | * Inode handling routines for the OSTA-UDF(tm) filesystem. | |
6 | * | |
1da177e4 LT |
7 | * COPYRIGHT |
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. | |
12 | * | |
13 | * (C) 1998 Dave Boynton | |
14 | * (C) 1998-2004 Ben Fennema | |
15 | * (C) 1999-2000 Stelias Computing Inc | |
16 | * | |
17 | * HISTORY | |
18 | * | |
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 | |
4b11111a MS |
22 | * 12/06/98 blf partition support in udf_iget, udf_block_map |
23 | * and udf_read_inode | |
1da177e4 LT |
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 # | |
30 | */ | |
31 | ||
32 | #include "udfdecl.h" | |
33 | #include <linux/mm.h> | |
1da177e4 LT |
34 | #include <linux/module.h> |
35 | #include <linux/pagemap.h> | |
1da177e4 LT |
36 | #include <linux/writeback.h> |
37 | #include <linux/slab.h> | |
f845fced | 38 | #include <linux/crc-itu-t.h> |
bc112323 | 39 | #include <linux/mpage.h> |
e2e40f2c | 40 | #include <linux/uio.h> |
2f8b5444 | 41 | #include <linux/bio.h> |
1da177e4 LT |
42 | |
43 | #include "udf_i.h" | |
44 | #include "udf_sb.h" | |
45 | ||
1da177e4 LT |
46 | #define EXTENT_MERGE_SIZE 5 |
47 | ||
c3367a1b SM |
48 | #define FE_MAPPED_PERMS (FE_PERM_U_READ | FE_PERM_U_WRITE | FE_PERM_U_EXEC | \ |
49 | FE_PERM_G_READ | FE_PERM_G_WRITE | FE_PERM_G_EXEC | \ | |
50 | FE_PERM_O_READ | FE_PERM_O_WRITE | FE_PERM_O_EXEC) | |
51 | ||
52 | #define FE_DELETE_PERMS (FE_PERM_U_DELETE | FE_PERM_G_DELETE | \ | |
53 | FE_PERM_O_DELETE) | |
54 | ||
f3a30be7 JK |
55 | struct udf_map_rq; |
56 | ||
faa17292 | 57 | static umode_t udf_convert_permissions(struct fileEntry *); |
1da177e4 | 58 | static int udf_update_inode(struct inode *, int); |
49521de1 | 59 | static int udf_sync_inode(struct inode *inode); |
647bd61a | 60 | static int udf_alloc_i_data(struct inode *inode, size_t size); |
b3c03fce | 61 | static int inode_getblk(struct inode *inode, struct udf_map_rq *map); |
19fd80de JK |
62 | static int udf_insert_aext(struct inode *, struct extent_position, |
63 | struct kernel_lb_addr, uint32_t); | |
b490bdd6 | 64 | static void udf_split_extents(struct inode *, int *, int, udf_pblk_t, |
3cc6f844 | 65 | struct kernel_long_ad *, int *); |
1da177e4 | 66 | static void udf_prealloc_extents(struct inode *, int, int, |
3cc6f844 FF |
67 | struct kernel_long_ad *, int *); |
68 | static void udf_merge_extents(struct inode *, struct kernel_long_ad *, int *); | |
19fd80de JK |
69 | static int udf_update_extents(struct inode *, struct kernel_long_ad *, int, |
70 | int, struct extent_position *); | |
1da177e4 LT |
71 | static int udf_get_block(struct inode *, sector_t, struct buffer_head *, int); |
72 | ||
99600051 NJ |
73 | static void __udf_clear_extent_cache(struct inode *inode) |
74 | { | |
75 | struct udf_inode_info *iinfo = UDF_I(inode); | |
76 | ||
77 | if (iinfo->cached_extent.lstart != -1) { | |
78 | brelse(iinfo->cached_extent.epos.bh); | |
79 | iinfo->cached_extent.lstart = -1; | |
80 | } | |
81 | } | |
82 | ||
83 | /* Invalidate extent cache */ | |
84 | static void udf_clear_extent_cache(struct inode *inode) | |
85 | { | |
86 | struct udf_inode_info *iinfo = UDF_I(inode); | |
87 | ||
88 | spin_lock(&iinfo->i_extent_cache_lock); | |
89 | __udf_clear_extent_cache(inode); | |
90 | spin_unlock(&iinfo->i_extent_cache_lock); | |
91 | } | |
92 | ||
93 | /* Return contents of extent cache */ | |
94 | static int udf_read_extent_cache(struct inode *inode, loff_t bcount, | |
95 | loff_t *lbcount, struct extent_position *pos) | |
96 | { | |
97 | struct udf_inode_info *iinfo = UDF_I(inode); | |
98 | int ret = 0; | |
99 | ||
100 | spin_lock(&iinfo->i_extent_cache_lock); | |
101 | if ((iinfo->cached_extent.lstart <= bcount) && | |
102 | (iinfo->cached_extent.lstart != -1)) { | |
103 | /* Cache hit */ | |
104 | *lbcount = iinfo->cached_extent.lstart; | |
105 | memcpy(pos, &iinfo->cached_extent.epos, | |
106 | sizeof(struct extent_position)); | |
107 | if (pos->bh) | |
108 | get_bh(pos->bh); | |
109 | ret = 1; | |
110 | } | |
111 | spin_unlock(&iinfo->i_extent_cache_lock); | |
112 | return ret; | |
113 | } | |
114 | ||
115 | /* Add extent to extent cache */ | |
116 | static void udf_update_extent_cache(struct inode *inode, loff_t estart, | |
b31c9ed9 | 117 | struct extent_position *pos) |
99600051 NJ |
118 | { |
119 | struct udf_inode_info *iinfo = UDF_I(inode); | |
120 | ||
121 | spin_lock(&iinfo->i_extent_cache_lock); | |
122 | /* Invalidate previously cached extent */ | |
123 | __udf_clear_extent_cache(inode); | |
124 | if (pos->bh) | |
125 | get_bh(pos->bh); | |
033c9da0 | 126 | memcpy(&iinfo->cached_extent.epos, pos, sizeof(*pos)); |
99600051 | 127 | iinfo->cached_extent.lstart = estart; |
b31c9ed9 FF |
128 | switch (iinfo->i_alloc_type) { |
129 | case ICBTAG_FLAG_AD_SHORT: | |
130 | iinfo->cached_extent.epos.offset -= sizeof(struct short_ad); | |
131 | break; | |
132 | case ICBTAG_FLAG_AD_LONG: | |
133 | iinfo->cached_extent.epos.offset -= sizeof(struct long_ad); | |
134 | break; | |
135 | } | |
99600051 NJ |
136 | spin_unlock(&iinfo->i_extent_cache_lock); |
137 | } | |
b1e32126 | 138 | |
3aac2b62 | 139 | void udf_evict_inode(struct inode *inode) |
1da177e4 | 140 | { |
2c948b3f | 141 | struct udf_inode_info *iinfo = UDF_I(inode); |
3aac2b62 AV |
142 | int want_delete = 0; |
143 | ||
044e2e26 JK |
144 | if (!is_bad_inode(inode)) { |
145 | if (!inode->i_nlink) { | |
146 | want_delete = 1; | |
147 | udf_setsize(inode, 0); | |
148 | udf_update_inode(inode, IS_SYNC(inode)); | |
149 | } | |
150 | if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB && | |
151 | inode->i_size != iinfo->i_lenExtents) { | |
152 | udf_warn(inode->i_sb, | |
153 | "Inode %lu (mode %o) has inode size %llu different from extent length %llu. Filesystem need not be standards compliant.\n", | |
154 | inode->i_ino, inode->i_mode, | |
155 | (unsigned long long)inode->i_size, | |
156 | (unsigned long long)iinfo->i_lenExtents); | |
157 | } | |
91b0abe3 JW |
158 | } |
159 | truncate_inode_pages_final(&inode->i_data); | |
3aac2b62 | 160 | invalidate_inode_buffers(inode); |
dbd5768f | 161 | clear_inode(inode); |
382a2287 JK |
162 | kfree(iinfo->i_data); |
163 | iinfo->i_data = NULL; | |
99600051 | 164 | udf_clear_extent_cache(inode); |
3aac2b62 | 165 | if (want_delete) { |
3aac2b62 | 166 | udf_free_inode(inode); |
3aac2b62 | 167 | } |
1da177e4 LT |
168 | } |
169 | ||
5eec54fc IA |
170 | static void udf_write_failed(struct address_space *mapping, loff_t to) |
171 | { | |
172 | struct inode *inode = mapping->host; | |
173 | struct udf_inode_info *iinfo = UDF_I(inode); | |
174 | loff_t isize = inode->i_size; | |
175 | ||
176 | if (to > isize) { | |
7caef267 | 177 | truncate_pagecache(inode, isize); |
5eec54fc IA |
178 | if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { |
179 | down_write(&iinfo->i_data_sem); | |
99600051 | 180 | udf_clear_extent_cache(inode); |
5eec54fc IA |
181 | udf_truncate_extents(inode); |
182 | up_write(&iinfo->i_data_sem); | |
183 | } | |
184 | } | |
185 | } | |
186 | ||
378b8e1a NJ |
187 | static int udf_writepages(struct address_space *mapping, |
188 | struct writeback_control *wbc) | |
189 | { | |
190 | return mpage_writepages(mapping, wbc, udf_get_block); | |
191 | } | |
192 | ||
f132ab7d | 193 | static int udf_read_folio(struct file *file, struct folio *folio) |
1da177e4 | 194 | { |
f132ab7d | 195 | return mpage_read_folio(folio, udf_get_block); |
bc112323 NJ |
196 | } |
197 | ||
d4388340 | 198 | static void udf_readahead(struct readahead_control *rac) |
bc112323 | 199 | { |
d4388340 | 200 | mpage_readahead(rac, udf_get_block); |
1da177e4 LT |
201 | } |
202 | ||
be021ee4 | 203 | static int udf_write_begin(struct file *file, struct address_space *mapping, |
9d6b0cd7 | 204 | loff_t pos, unsigned len, |
be021ee4 | 205 | struct page **pagep, void **fsdata) |
1da177e4 | 206 | { |
155130a4 CH |
207 | int ret; |
208 | ||
b3992d1e | 209 | ret = block_write_begin(mapping, pos, len, pagep, udf_get_block); |
5eec54fc IA |
210 | if (unlikely(ret)) |
211 | udf_write_failed(mapping, pos + len); | |
212 | return ret; | |
213 | } | |
155130a4 | 214 | |
c8b8e32d | 215 | static ssize_t udf_direct_IO(struct kiocb *iocb, struct iov_iter *iter) |
5eec54fc IA |
216 | { |
217 | struct file *file = iocb->ki_filp; | |
218 | struct address_space *mapping = file->f_mapping; | |
219 | struct inode *inode = mapping->host; | |
a6cbcd4a | 220 | size_t count = iov_iter_count(iter); |
5eec54fc IA |
221 | ssize_t ret; |
222 | ||
c8b8e32d | 223 | ret = blockdev_direct_IO(iocb, inode, iter, udf_get_block); |
6f673763 | 224 | if (unlikely(ret < 0 && iov_iter_rw(iter) == WRITE)) |
c8b8e32d | 225 | udf_write_failed(mapping, iocb->ki_pos + count); |
155130a4 | 226 | return ret; |
1da177e4 LT |
227 | } |
228 | ||
229 | static sector_t udf_bmap(struct address_space *mapping, sector_t block) | |
230 | { | |
cb00ea35 | 231 | return generic_block_bmap(mapping, block, udf_get_block); |
1da177e4 LT |
232 | } |
233 | ||
f5e54d6e | 234 | const struct address_space_operations udf_aops = { |
e621900a | 235 | .dirty_folio = block_dirty_folio, |
7ba13abb | 236 | .invalidate_folio = block_invalidate_folio, |
f132ab7d | 237 | .read_folio = udf_read_folio, |
d4388340 | 238 | .readahead = udf_readahead, |
378b8e1a | 239 | .writepages = udf_writepages, |
5eec54fc IA |
240 | .write_begin = udf_write_begin, |
241 | .write_end = generic_write_end, | |
242 | .direct_IO = udf_direct_IO, | |
28de7948 | 243 | .bmap = udf_bmap, |
36273e5b | 244 | .migrate_folio = buffer_migrate_folio, |
1da177e4 LT |
245 | }; |
246 | ||
d2eb8c35 JK |
247 | /* |
248 | * Expand file stored in ICB to a normal one-block-file | |
249 | * | |
d2eb8c35 JK |
250 | * This function requires i_mutex held |
251 | */ | |
7e49b6f2 | 252 | int udf_expand_file_adinicb(struct inode *inode) |
1da177e4 LT |
253 | { |
254 | struct page *page; | |
255 | char *kaddr; | |
48d6d8ff | 256 | struct udf_inode_info *iinfo = UDF_I(inode); |
7e49b6f2 | 257 | int err; |
1da177e4 | 258 | |
5955102c | 259 | WARN_ON_ONCE(!inode_is_locked(inode)); |
48d6d8ff | 260 | if (!iinfo->i_lenAlloc) { |
6a3b37e0 | 261 | down_write(&iinfo->i_data_sem); |
1da177e4 | 262 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) |
48d6d8ff | 263 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT; |
1da177e4 | 264 | else |
48d6d8ff | 265 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG; |
7e49b6f2 JK |
266 | /* from now on we have normal address_space methods */ |
267 | inode->i_data.a_ops = &udf_aops; | |
d2eb8c35 | 268 | up_write(&iinfo->i_data_sem); |
1da177e4 | 269 | mark_inode_dirty(inode); |
7e49b6f2 | 270 | return 0; |
1da177e4 LT |
271 | } |
272 | ||
7e49b6f2 JK |
273 | page = find_or_create_page(inode->i_mapping, 0, GFP_NOFS); |
274 | if (!page) | |
275 | return -ENOMEM; | |
cd7619d6 | 276 | |
cb00ea35 | 277 | if (!PageUptodate(page)) { |
5c26eac4 | 278 | kaddr = kmap_atomic(page); |
48d6d8ff | 279 | memset(kaddr + iinfo->i_lenAlloc, 0x00, |
09cbfeaf | 280 | PAGE_SIZE - iinfo->i_lenAlloc); |
382a2287 | 281 | memcpy(kaddr, iinfo->i_data + iinfo->i_lenEAttr, |
48d6d8ff | 282 | iinfo->i_lenAlloc); |
1da177e4 LT |
283 | flush_dcache_page(page); |
284 | SetPageUptodate(page); | |
5c26eac4 | 285 | kunmap_atomic(kaddr); |
1da177e4 | 286 | } |
d2eb8c35 | 287 | down_write(&iinfo->i_data_sem); |
382a2287 | 288 | memset(iinfo->i_data + iinfo->i_lenEAttr, 0x00, |
48d6d8ff MS |
289 | iinfo->i_lenAlloc); |
290 | iinfo->i_lenAlloc = 0; | |
1da177e4 | 291 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) |
48d6d8ff | 292 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT; |
1da177e4 | 293 | else |
48d6d8ff | 294 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG; |
7e49b6f2 JK |
295 | /* from now on we have normal address_space methods */ |
296 | inode->i_data.a_ops = &udf_aops; | |
7fc3b7c2 JK |
297 | set_page_dirty(page); |
298 | unlock_page(page); | |
d2eb8c35 | 299 | up_write(&iinfo->i_data_sem); |
7fc3b7c2 | 300 | err = filemap_fdatawrite(inode->i_mapping); |
7e49b6f2 JK |
301 | if (err) { |
302 | /* Restore everything back so that we don't lose data... */ | |
303 | lock_page(page); | |
d2eb8c35 | 304 | down_write(&iinfo->i_data_sem); |
5c26eac4 | 305 | kaddr = kmap_atomic(page); |
382a2287 | 306 | memcpy(iinfo->i_data + iinfo->i_lenEAttr, kaddr, inode->i_size); |
5c26eac4 | 307 | kunmap_atomic(kaddr); |
7e49b6f2 JK |
308 | unlock_page(page); |
309 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB; | |
310 | inode->i_data.a_ops = &udf_adinicb_aops; | |
ea856919 | 311 | iinfo->i_lenAlloc = inode->i_size; |
d2eb8c35 | 312 | up_write(&iinfo->i_data_sem); |
7e49b6f2 | 313 | } |
09cbfeaf | 314 | put_page(page); |
1da177e4 | 315 | mark_inode_dirty(inode); |
7e49b6f2 JK |
316 | |
317 | return err; | |
1da177e4 LT |
318 | } |
319 | ||
80942521 JK |
320 | #define UDF_MAP_CREATE 0x01 /* Mapping can allocate new blocks */ |
321 | #define UDF_MAP_NOPREALLOC 0x02 /* Do not preallocate blocks */ | |
f3a30be7 JK |
322 | |
323 | #define UDF_BLK_MAPPED 0x01 /* Block was successfully mapped */ | |
324 | #define UDF_BLK_NEW 0x02 /* Block was freshly allocated */ | |
325 | ||
326 | struct udf_map_rq { | |
327 | sector_t lblk; | |
328 | udf_pblk_t pblk; | |
329 | int iflags; /* UDF_MAP_ flags determining behavior */ | |
330 | int oflags; /* UDF_BLK_ flags reporting results */ | |
331 | }; | |
332 | ||
333 | static int udf_map_block(struct inode *inode, struct udf_map_rq *map) | |
1da177e4 | 334 | { |
b3c03fce | 335 | int err; |
f3a30be7 | 336 | struct udf_inode_info *iinfo = UDF_I(inode); |
1da177e4 | 337 | |
f3a30be7 JK |
338 | map->oflags = 0; |
339 | if (!(map->iflags & UDF_MAP_CREATE)) { | |
364a6665 JK |
340 | struct kernel_lb_addr eloc; |
341 | uint32_t elen; | |
342 | sector_t offset; | |
343 | struct extent_position epos = {}; | |
344 | ||
345 | down_read(&iinfo->i_data_sem); | |
346 | if (inode_bmap(inode, map->lblk, &epos, &eloc, &elen, &offset) | |
347 | == (EXT_RECORDED_ALLOCATED >> 30)) { | |
348 | map->pblk = udf_get_lb_pblock(inode->i_sb, &eloc, | |
349 | offset); | |
f3a30be7 | 350 | map->oflags |= UDF_BLK_MAPPED; |
364a6665 JK |
351 | } |
352 | up_read(&iinfo->i_data_sem); | |
353 | brelse(epos.bh); | |
354 | ||
1da177e4 LT |
355 | return 0; |
356 | } | |
357 | ||
4d0fb621 | 358 | down_write(&iinfo->i_data_sem); |
16d05565 JK |
359 | /* |
360 | * Block beyond EOF and prealloc extents? Just discard preallocation | |
361 | * as it is not useful and complicates things. | |
362 | */ | |
f3a30be7 | 363 | if (((loff_t)map->lblk) << inode->i_blkbits > iinfo->i_lenExtents) |
16d05565 | 364 | udf_discard_prealloc(inode); |
99600051 | 365 | udf_clear_extent_cache(inode); |
b3c03fce | 366 | err = inode_getblk(inode, map); |
f3a30be7 | 367 | up_write(&iinfo->i_data_sem); |
b3c03fce | 368 | return err; |
f3a30be7 | 369 | } |
28de7948 | 370 | |
f3a30be7 JK |
371 | static int udf_get_block(struct inode *inode, sector_t block, |
372 | struct buffer_head *bh_result, int create) | |
373 | { | |
374 | int err; | |
375 | struct udf_map_rq map = { | |
376 | .lblk = block, | |
377 | .iflags = create ? UDF_MAP_CREATE : 0, | |
378 | }; | |
379 | ||
80942521 JK |
380 | /* |
381 | * We preallocate blocks only for regular files. It also makes sense | |
382 | * for directories but there's a problem when to drop the | |
383 | * preallocation. We might use some delayed work for that but I feel | |
384 | * it's overengineering for a filesystem like UDF. | |
385 | */ | |
386 | if (!S_ISREG(inode->i_mode)) | |
387 | map.iflags |= UDF_MAP_NOPREALLOC; | |
f3a30be7 JK |
388 | err = udf_map_block(inode, &map); |
389 | if (err < 0) | |
390 | return err; | |
391 | if (map.oflags & UDF_BLK_MAPPED) { | |
392 | map_bh(bh_result, inode->i_sb, map.pblk); | |
393 | if (map.oflags & UDF_BLK_NEW) | |
394 | set_buffer_new(bh_result); | |
395 | } | |
396 | return 0; | |
1da177e4 LT |
397 | } |
398 | ||
fa33cdbf SM |
399 | /* Extend the file with new blocks totaling 'new_block_bytes', |
400 | * return the number of extents added | |
401 | */ | |
7e49b6f2 JK |
402 | static int udf_do_extend_file(struct inode *inode, |
403 | struct extent_position *last_pos, | |
404 | struct kernel_long_ad *last_ext, | |
fa33cdbf | 405 | loff_t new_block_bytes) |
31170b6a | 406 | { |
fa33cdbf | 407 | uint32_t add; |
31170b6a JK |
408 | int count = 0, fake = !(last_ext->extLength & UDF_EXTENT_LENGTH_MASK); |
409 | struct super_block *sb = inode->i_sb; | |
48d6d8ff | 410 | struct udf_inode_info *iinfo; |
7e49b6f2 | 411 | int err; |
31170b6a JK |
412 | |
413 | /* The previous extent is fake and we should not extend by anything | |
414 | * - there's nothing to do... */ | |
fa33cdbf | 415 | if (!new_block_bytes && fake) |
31170b6a | 416 | return 0; |
28de7948 | 417 | |
48d6d8ff | 418 | iinfo = UDF_I(inode); |
31170b6a JK |
419 | /* Round the last extent up to a multiple of block size */ |
420 | if (last_ext->extLength & (sb->s_blocksize - 1)) { | |
421 | last_ext->extLength = | |
28de7948 CG |
422 | (last_ext->extLength & UDF_EXTENT_FLAG_MASK) | |
423 | (((last_ext->extLength & UDF_EXTENT_LENGTH_MASK) + | |
424 | sb->s_blocksize - 1) & ~(sb->s_blocksize - 1)); | |
48d6d8ff MS |
425 | iinfo->i_lenExtents = |
426 | (iinfo->i_lenExtents + sb->s_blocksize - 1) & | |
28de7948 | 427 | ~(sb->s_blocksize - 1); |
31170b6a | 428 | } |
28de7948 | 429 | |
e57191a8 | 430 | add = 0; |
31170b6a | 431 | /* Can we merge with the previous extent? */ |
4b11111a MS |
432 | if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) == |
433 | EXT_NOT_RECORDED_NOT_ALLOCATED) { | |
fa33cdbf SM |
434 | add = (1 << 30) - sb->s_blocksize - |
435 | (last_ext->extLength & UDF_EXTENT_LENGTH_MASK); | |
436 | if (add > new_block_bytes) | |
437 | add = new_block_bytes; | |
438 | new_block_bytes -= add; | |
439 | last_ext->extLength += add; | |
31170b6a JK |
440 | } |
441 | ||
442 | if (fake) { | |
70bfb3a8 JK |
443 | err = udf_add_aext(inode, last_pos, &last_ext->extLocation, |
444 | last_ext->extLength, 1); | |
445 | if (err < 0) | |
446 | goto out_err; | |
31170b6a | 447 | count++; |
6c371578 JK |
448 | } else { |
449 | struct kernel_lb_addr tmploc; | |
450 | uint32_t tmplen; | |
451 | ||
97e961fd | 452 | udf_write_aext(inode, last_pos, &last_ext->extLocation, |
4b11111a | 453 | last_ext->extLength, 1); |
63c9e47a | 454 | |
6c371578 | 455 | /* |
63c9e47a SM |
456 | * We've rewritten the last extent. If we are going to add |
457 | * more extents, we may need to enter possible following | |
458 | * empty indirect extent. | |
6c371578 | 459 | */ |
16d05565 | 460 | if (new_block_bytes) |
63c9e47a | 461 | udf_next_aext(inode, last_pos, &tmploc, &tmplen, 0); |
6c371578 | 462 | } |
e57191a8 | 463 | iinfo->i_lenExtents += add; |
28de7948 | 464 | |
31170b6a | 465 | /* Managed to do everything necessary? */ |
fa33cdbf | 466 | if (!new_block_bytes) |
31170b6a JK |
467 | goto out; |
468 | ||
469 | /* All further extents will be NOT_RECORDED_NOT_ALLOCATED */ | |
470 | last_ext->extLocation.logicalBlockNum = 0; | |
4b11111a | 471 | last_ext->extLocation.partitionReferenceNum = 0; |
fa33cdbf SM |
472 | add = (1 << 30) - sb->s_blocksize; |
473 | last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | add; | |
28de7948 | 474 | |
31170b6a | 475 | /* Create enough extents to cover the whole hole */ |
fa33cdbf SM |
476 | while (new_block_bytes > add) { |
477 | new_block_bytes -= add; | |
7e49b6f2 JK |
478 | err = udf_add_aext(inode, last_pos, &last_ext->extLocation, |
479 | last_ext->extLength, 1); | |
480 | if (err) | |
70bfb3a8 | 481 | goto out_err; |
e57191a8 | 482 | iinfo->i_lenExtents += add; |
31170b6a JK |
483 | count++; |
484 | } | |
fa33cdbf | 485 | if (new_block_bytes) { |
31170b6a | 486 | last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | |
fa33cdbf | 487 | new_block_bytes; |
7e49b6f2 JK |
488 | err = udf_add_aext(inode, last_pos, &last_ext->extLocation, |
489 | last_ext->extLength, 1); | |
490 | if (err) | |
70bfb3a8 | 491 | goto out_err; |
e57191a8 | 492 | iinfo->i_lenExtents += new_block_bytes; |
31170b6a JK |
493 | count++; |
494 | } | |
28de7948 CG |
495 | |
496 | out: | |
31170b6a | 497 | /* last_pos should point to the last written extent... */ |
48d6d8ff | 498 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
5ca4e4be | 499 | last_pos->offset -= sizeof(struct short_ad); |
48d6d8ff | 500 | else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
5ca4e4be | 501 | last_pos->offset -= sizeof(struct long_ad); |
31170b6a | 502 | else |
7e49b6f2 | 503 | return -EIO; |
28de7948 | 504 | |
31170b6a | 505 | return count; |
70bfb3a8 JK |
506 | out_err: |
507 | /* Remove extents we've created so far */ | |
508 | udf_clear_extent_cache(inode); | |
509 | udf_truncate_extents(inode); | |
510 | return err; | |
31170b6a JK |
511 | } |
512 | ||
fa33cdbf SM |
513 | /* Extend the final block of the file to final_block_len bytes */ |
514 | static void udf_do_extend_final_block(struct inode *inode, | |
515 | struct extent_position *last_pos, | |
516 | struct kernel_long_ad *last_ext, | |
1f3868f0 | 517 | uint32_t new_elen) |
fa33cdbf | 518 | { |
fa33cdbf SM |
519 | uint32_t added_bytes; |
520 | ||
1f3868f0 JK |
521 | /* |
522 | * Extent already large enough? It may be already rounded up to block | |
523 | * size... | |
524 | */ | |
525 | if (new_elen <= (last_ext->extLength & UDF_EXTENT_LENGTH_MASK)) | |
526 | return; | |
83c7423d | 527 | added_bytes = new_elen - (last_ext->extLength & UDF_EXTENT_LENGTH_MASK); |
fa33cdbf SM |
528 | last_ext->extLength += added_bytes; |
529 | UDF_I(inode)->i_lenExtents += added_bytes; | |
530 | ||
531 | udf_write_aext(inode, last_pos, &last_ext->extLocation, | |
532 | last_ext->extLength, 1); | |
533 | } | |
534 | ||
7e49b6f2 JK |
535 | static int udf_extend_file(struct inode *inode, loff_t newsize) |
536 | { | |
537 | ||
538 | struct extent_position epos; | |
539 | struct kernel_lb_addr eloc; | |
540 | uint32_t elen; | |
541 | int8_t etype; | |
542 | struct super_block *sb = inode->i_sb; | |
543 | sector_t first_block = newsize >> sb->s_blocksize_bits, offset; | |
1f3868f0 | 544 | loff_t new_elen; |
7e49b6f2 JK |
545 | int adsize; |
546 | struct udf_inode_info *iinfo = UDF_I(inode); | |
547 | struct kernel_long_ad extent; | |
fa33cdbf | 548 | int err = 0; |
1f3868f0 | 549 | bool within_last_ext; |
7e49b6f2 JK |
550 | |
551 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) | |
552 | adsize = sizeof(struct short_ad); | |
553 | else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) | |
554 | adsize = sizeof(struct long_ad); | |
555 | else | |
556 | BUG(); | |
557 | ||
16d05565 JK |
558 | /* |
559 | * When creating hole in file, just don't bother with preserving | |
560 | * preallocation. It likely won't be very useful anyway. | |
561 | */ | |
562 | udf_discard_prealloc(inode); | |
563 | ||
7e49b6f2 | 564 | etype = inode_bmap(inode, first_block, &epos, &eloc, &elen, &offset); |
1f3868f0 | 565 | within_last_ext = (etype != -1); |
16d05565 | 566 | /* We don't expect extents past EOF... */ |
1f3868f0 | 567 | WARN_ON_ONCE(within_last_ext && |
16d05565 | 568 | elen > ((loff_t)offset + 1) << inode->i_blkbits); |
7e49b6f2 | 569 | |
7e49b6f2 JK |
570 | if ((!epos.bh && epos.offset == udf_file_entry_alloc_offset(inode)) || |
571 | (epos.bh && epos.offset == sizeof(struct allocExtDesc))) { | |
572 | /* File has no extents at all or has empty last | |
573 | * indirect extent! Create a fake extent... */ | |
574 | extent.extLocation.logicalBlockNum = 0; | |
575 | extent.extLocation.partitionReferenceNum = 0; | |
576 | extent.extLength = EXT_NOT_RECORDED_NOT_ALLOCATED; | |
577 | } else { | |
578 | epos.offset -= adsize; | |
579 | etype = udf_next_aext(inode, &epos, &extent.extLocation, | |
580 | &extent.extLength, 0); | |
581 | extent.extLength |= etype << 30; | |
582 | } | |
fa33cdbf | 583 | |
1f3868f0 JK |
584 | new_elen = ((loff_t)offset << inode->i_blkbits) | |
585 | (newsize & (sb->s_blocksize - 1)); | |
fa33cdbf SM |
586 | |
587 | /* File has extent covering the new size (could happen when extending | |
588 | * inside a block)? | |
589 | */ | |
1f3868f0 | 590 | if (within_last_ext) { |
fa33cdbf | 591 | /* Extending file within the last file block */ |
1f3868f0 | 592 | udf_do_extend_final_block(inode, &epos, &extent, new_elen); |
fa33cdbf | 593 | } else { |
1f3868f0 | 594 | err = udf_do_extend_file(inode, &epos, &extent, new_elen); |
fa33cdbf SM |
595 | } |
596 | ||
7e49b6f2 JK |
597 | if (err < 0) |
598 | goto out; | |
599 | err = 0; | |
7e49b6f2 JK |
600 | out: |
601 | brelse(epos.bh); | |
602 | return err; | |
603 | } | |
604 | ||
b3c03fce | 605 | static int inode_getblk(struct inode *inode, struct udf_map_rq *map) |
1da177e4 | 606 | { |
5ca4e4be | 607 | struct kernel_long_ad laarr[EXTENT_MERGE_SIZE]; |
ff116fc8 | 608 | struct extent_position prev_epos, cur_epos, next_epos; |
1da177e4 | 609 | int count = 0, startnum = 0, endnum = 0; |
85d71244 | 610 | uint32_t elen = 0, tmpelen; |
5ca4e4be | 611 | struct kernel_lb_addr eloc, tmpeloc; |
1da177e4 | 612 | int c = 1; |
60448b1d | 613 | loff_t lbcount = 0, b_off = 0; |
b3c03fce | 614 | udf_pblk_t newblocknum; |
60448b1d | 615 | sector_t offset = 0; |
1da177e4 | 616 | int8_t etype; |
48d6d8ff | 617 | struct udf_inode_info *iinfo = UDF_I(inode); |
b490bdd6 | 618 | udf_pblk_t goal = 0, pgoal = iinfo->i_location.logicalBlockNum; |
31170b6a | 619 | int lastblock = 0; |
fb719c59 | 620 | bool isBeyondEOF; |
b3c03fce | 621 | int ret = 0; |
1da177e4 | 622 | |
ff116fc8 | 623 | prev_epos.offset = udf_file_entry_alloc_offset(inode); |
48d6d8ff | 624 | prev_epos.block = iinfo->i_location; |
ff116fc8 JK |
625 | prev_epos.bh = NULL; |
626 | cur_epos = next_epos = prev_epos; | |
b3c03fce | 627 | b_off = (loff_t)map->lblk << inode->i_sb->s_blocksize_bits; |
1da177e4 LT |
628 | |
629 | /* find the extent which contains the block we are looking for. | |
cb00ea35 CG |
630 | alternate between laarr[0] and laarr[1] for locations of the |
631 | current extent, and the previous extent */ | |
632 | do { | |
633 | if (prev_epos.bh != cur_epos.bh) { | |
3bf25cb4 JK |
634 | brelse(prev_epos.bh); |
635 | get_bh(cur_epos.bh); | |
ff116fc8 | 636 | prev_epos.bh = cur_epos.bh; |
1da177e4 | 637 | } |
cb00ea35 | 638 | if (cur_epos.bh != next_epos.bh) { |
3bf25cb4 JK |
639 | brelse(cur_epos.bh); |
640 | get_bh(next_epos.bh); | |
ff116fc8 | 641 | cur_epos.bh = next_epos.bh; |
1da177e4 LT |
642 | } |
643 | ||
644 | lbcount += elen; | |
645 | ||
ff116fc8 JK |
646 | prev_epos.block = cur_epos.block; |
647 | cur_epos.block = next_epos.block; | |
1da177e4 | 648 | |
ff116fc8 JK |
649 | prev_epos.offset = cur_epos.offset; |
650 | cur_epos.offset = next_epos.offset; | |
1da177e4 | 651 | |
4b11111a MS |
652 | etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 1); |
653 | if (etype == -1) | |
1da177e4 LT |
654 | break; |
655 | ||
656 | c = !c; | |
657 | ||
658 | laarr[c].extLength = (etype << 30) | elen; | |
659 | laarr[c].extLocation = eloc; | |
660 | ||
661 | if (etype != (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) | |
662 | pgoal = eloc.logicalBlockNum + | |
28de7948 CG |
663 | ((elen + inode->i_sb->s_blocksize - 1) >> |
664 | inode->i_sb->s_blocksize_bits); | |
1da177e4 | 665 | |
cb00ea35 | 666 | count++; |
1da177e4 LT |
667 | } while (lbcount + elen <= b_off); |
668 | ||
669 | b_off -= lbcount; | |
670 | offset = b_off >> inode->i_sb->s_blocksize_bits; | |
85d71244 JK |
671 | /* |
672 | * Move prev_epos and cur_epos into indirect extent if we are at | |
673 | * the pointer to it | |
674 | */ | |
675 | udf_next_aext(inode, &prev_epos, &tmpeloc, &tmpelen, 0); | |
676 | udf_next_aext(inode, &cur_epos, &tmpeloc, &tmpelen, 0); | |
1da177e4 LT |
677 | |
678 | /* if the extent is allocated and recorded, return the block | |
cb00ea35 | 679 | if the extent is not a multiple of the blocksize, round up */ |
1da177e4 | 680 | |
cb00ea35 CG |
681 | if (etype == (EXT_RECORDED_ALLOCATED >> 30)) { |
682 | if (elen & (inode->i_sb->s_blocksize - 1)) { | |
1da177e4 | 683 | elen = EXT_RECORDED_ALLOCATED | |
28de7948 CG |
684 | ((elen + inode->i_sb->s_blocksize - 1) & |
685 | ~(inode->i_sb->s_blocksize - 1)); | |
b316c443 JK |
686 | iinfo->i_lenExtents = |
687 | ALIGN(iinfo->i_lenExtents, | |
688 | inode->i_sb->s_blocksize); | |
7e49b6f2 | 689 | udf_write_aext(inode, &cur_epos, &eloc, elen, 1); |
1da177e4 | 690 | } |
b3c03fce JK |
691 | map->oflags = UDF_BLK_MAPPED; |
692 | map->pblk = udf_get_lb_pblock(inode->i_sb, &eloc, offset); | |
02d4ca49 | 693 | goto out_free; |
1da177e4 LT |
694 | } |
695 | ||
16d05565 | 696 | /* Are we beyond EOF and preallocated extent? */ |
cb00ea35 | 697 | if (etype == -1) { |
fa33cdbf | 698 | loff_t hole_len; |
16d05565 | 699 | |
6981498d | 700 | isBeyondEOF = true; |
31170b6a JK |
701 | if (count) { |
702 | if (c) | |
703 | laarr[0] = laarr[1]; | |
704 | startnum = 1; | |
cb00ea35 | 705 | } else { |
31170b6a | 706 | /* Create a fake extent when there's not one */ |
4b11111a | 707 | memset(&laarr[0].extLocation, 0x00, |
5ca4e4be | 708 | sizeof(struct kernel_lb_addr)); |
31170b6a | 709 | laarr[0].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED; |
7e49b6f2 | 710 | /* Will udf_do_extend_file() create real extent from |
4b11111a | 711 | a fake one? */ |
31170b6a JK |
712 | startnum = (offset > 0); |
713 | } | |
714 | /* Create extents for the hole between EOF and offset */ | |
fa33cdbf SM |
715 | hole_len = (loff_t)offset << inode->i_blkbits; |
716 | ret = udf_do_extend_file(inode, &prev_epos, laarr, hole_len); | |
b3c03fce | 717 | if (ret < 0) |
02d4ca49 | 718 | goto out_free; |
31170b6a JK |
719 | c = 0; |
720 | offset = 0; | |
721 | count += ret; | |
722 | /* We are not covered by a preallocated extent? */ | |
4b11111a MS |
723 | if ((laarr[0].extLength & UDF_EXTENT_FLAG_MASK) != |
724 | EXT_NOT_RECORDED_ALLOCATED) { | |
31170b6a JK |
725 | /* Is there any real extent? - otherwise we overwrite |
726 | * the fake one... */ | |
727 | if (count) | |
728 | c = !c; | |
729 | laarr[c].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | | |
28de7948 | 730 | inode->i_sb->s_blocksize; |
4b11111a | 731 | memset(&laarr[c].extLocation, 0x00, |
5ca4e4be | 732 | sizeof(struct kernel_lb_addr)); |
cb00ea35 | 733 | count++; |
31170b6a | 734 | } |
cb00ea35 | 735 | endnum = c + 1; |
1da177e4 | 736 | lastblock = 1; |
cb00ea35 | 737 | } else { |
6981498d | 738 | isBeyondEOF = false; |
1da177e4 LT |
739 | endnum = startnum = ((count > 2) ? 2 : count); |
740 | ||
4b11111a MS |
741 | /* if the current extent is in position 0, |
742 | swap it with the previous */ | |
cb00ea35 | 743 | if (!c && count != 1) { |
31170b6a JK |
744 | laarr[2] = laarr[0]; |
745 | laarr[0] = laarr[1]; | |
746 | laarr[1] = laarr[2]; | |
747 | c = 1; | |
748 | } | |
1da177e4 | 749 | |
4b11111a MS |
750 | /* if the current block is located in an extent, |
751 | read the next extent */ | |
752 | etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 0); | |
753 | if (etype != -1) { | |
cb00ea35 CG |
754 | laarr[c + 1].extLength = (etype << 30) | elen; |
755 | laarr[c + 1].extLocation = eloc; | |
756 | count++; | |
757 | startnum++; | |
758 | endnum++; | |
4b11111a | 759 | } else |
1da177e4 LT |
760 | lastblock = 1; |
761 | } | |
1da177e4 LT |
762 | |
763 | /* if the current extent is not recorded but allocated, get the | |
28de7948 | 764 | * block in the extent corresponding to the requested block */ |
4b11111a | 765 | if ((laarr[c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30)) |
1da177e4 | 766 | newblocknum = laarr[c].extLocation.logicalBlockNum + offset; |
4b11111a | 767 | else { /* otherwise, allocate a new block */ |
b3c03fce | 768 | if (iinfo->i_next_alloc_block == map->lblk) |
48d6d8ff | 769 | goal = iinfo->i_next_alloc_goal; |
1da177e4 | 770 | |
cb00ea35 | 771 | if (!goal) { |
4b11111a | 772 | if (!(goal = pgoal)) /* XXX: what was intended here? */ |
48d6d8ff | 773 | goal = iinfo->i_location.logicalBlockNum + 1; |
1da177e4 LT |
774 | } |
775 | ||
4b11111a | 776 | newblocknum = udf_new_block(inode->i_sb, inode, |
48d6d8ff | 777 | iinfo->i_location.partitionReferenceNum, |
b3c03fce JK |
778 | goal, &ret); |
779 | if (!newblocknum) | |
02d4ca49 | 780 | goto out_free; |
fb719c59 NJ |
781 | if (isBeyondEOF) |
782 | iinfo->i_lenExtents += inode->i_sb->s_blocksize; | |
1da177e4 LT |
783 | } |
784 | ||
4b11111a MS |
785 | /* if the extent the requsted block is located in contains multiple |
786 | * blocks, split the extent into at most three extents. blocks prior | |
787 | * to requested block, requested block, and blocks after requested | |
788 | * block */ | |
1da177e4 LT |
789 | udf_split_extents(inode, &c, offset, newblocknum, laarr, &endnum); |
790 | ||
80942521 | 791 | if (!(map->iflags & UDF_MAP_NOPREALLOC)) |
81056dd0 | 792 | udf_prealloc_extents(inode, c, lastblock, laarr, &endnum); |
1da177e4 LT |
793 | |
794 | /* merge any continuous blocks in laarr */ | |
795 | udf_merge_extents(inode, laarr, &endnum); | |
796 | ||
797 | /* write back the new extents, inserting new extents if the new number | |
28de7948 CG |
798 | * of extents is greater than the old number, and deleting extents if |
799 | * the new number of extents is less than the old number */ | |
b3c03fce JK |
800 | ret = udf_update_extents(inode, laarr, startnum, endnum, &prev_epos); |
801 | if (ret < 0) | |
19fd80de | 802 | goto out_free; |
1da177e4 | 803 | |
b3c03fce | 804 | map->pblk = udf_get_pblock(inode->i_sb, newblocknum, |
48d6d8ff | 805 | iinfo->i_location.partitionReferenceNum, 0); |
b3c03fce JK |
806 | if (!map->pblk) { |
807 | ret = -EFSCORRUPTED; | |
02d4ca49 | 808 | goto out_free; |
7b0b0933 | 809 | } |
b3c03fce JK |
810 | map->oflags = UDF_BLK_NEW | UDF_BLK_MAPPED; |
811 | iinfo->i_next_alloc_block = map->lblk + 1; | |
de80dae0 | 812 | iinfo->i_next_alloc_goal = newblocknum + 1; |
c2050a45 | 813 | inode->i_ctime = current_time(inode); |
1da177e4 LT |
814 | |
815 | if (IS_SYNC(inode)) | |
816 | udf_sync_inode(inode); | |
817 | else | |
818 | mark_inode_dirty(inode); | |
b3c03fce | 819 | ret = 0; |
02d4ca49 FF |
820 | out_free: |
821 | brelse(prev_epos.bh); | |
822 | brelse(cur_epos.bh); | |
823 | brelse(next_epos.bh); | |
b3c03fce | 824 | return ret; |
1da177e4 LT |
825 | } |
826 | ||
cb00ea35 | 827 | static void udf_split_extents(struct inode *inode, int *c, int offset, |
b490bdd6 SM |
828 | udf_pblk_t newblocknum, |
829 | struct kernel_long_ad *laarr, int *endnum) | |
1da177e4 | 830 | { |
4b11111a MS |
831 | unsigned long blocksize = inode->i_sb->s_blocksize; |
832 | unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; | |
833 | ||
1da177e4 | 834 | if ((laarr[*c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30) || |
4b11111a MS |
835 | (laarr[*c].extLength >> 30) == |
836 | (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) { | |
1da177e4 LT |
837 | int curr = *c; |
838 | int blen = ((laarr[curr].extLength & UDF_EXTENT_LENGTH_MASK) + | |
4b11111a | 839 | blocksize - 1) >> blocksize_bits; |
1da177e4 LT |
840 | int8_t etype = (laarr[curr].extLength >> 30); |
841 | ||
4b11111a | 842 | if (blen == 1) |
28de7948 | 843 | ; |
4b11111a | 844 | else if (!offset || blen == offset + 1) { |
cb00ea35 CG |
845 | laarr[curr + 2] = laarr[curr + 1]; |
846 | laarr[curr + 1] = laarr[curr]; | |
847 | } else { | |
848 | laarr[curr + 3] = laarr[curr + 1]; | |
849 | laarr[curr + 2] = laarr[curr + 1] = laarr[curr]; | |
850 | } | |
851 | ||
852 | if (offset) { | |
853 | if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30)) { | |
4b11111a | 854 | udf_free_blocks(inode->i_sb, inode, |
97e961fd | 855 | &laarr[curr].extLocation, |
4b11111a MS |
856 | 0, offset); |
857 | laarr[curr].extLength = | |
858 | EXT_NOT_RECORDED_NOT_ALLOCATED | | |
859 | (offset << blocksize_bits); | |
1da177e4 | 860 | laarr[curr].extLocation.logicalBlockNum = 0; |
4b11111a MS |
861 | laarr[curr].extLocation. |
862 | partitionReferenceNum = 0; | |
863 | } else | |
1da177e4 | 864 | laarr[curr].extLength = (etype << 30) | |
4b11111a | 865 | (offset << blocksize_bits); |
cb00ea35 CG |
866 | curr++; |
867 | (*c)++; | |
868 | (*endnum)++; | |
1da177e4 | 869 | } |
647bd61a | 870 | |
1da177e4 LT |
871 | laarr[curr].extLocation.logicalBlockNum = newblocknum; |
872 | if (etype == (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) | |
873 | laarr[curr].extLocation.partitionReferenceNum = | |
c0b34438 | 874 | UDF_I(inode)->i_location.partitionReferenceNum; |
1da177e4 | 875 | laarr[curr].extLength = EXT_RECORDED_ALLOCATED | |
4b11111a | 876 | blocksize; |
cb00ea35 | 877 | curr++; |
1da177e4 | 878 | |
cb00ea35 | 879 | if (blen != offset + 1) { |
1da177e4 | 880 | if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30)) |
4b11111a MS |
881 | laarr[curr].extLocation.logicalBlockNum += |
882 | offset + 1; | |
28de7948 | 883 | laarr[curr].extLength = (etype << 30) | |
4b11111a | 884 | ((blen - (offset + 1)) << blocksize_bits); |
cb00ea35 CG |
885 | curr++; |
886 | (*endnum)++; | |
1da177e4 LT |
887 | } |
888 | } | |
889 | } | |
890 | ||
891 | static void udf_prealloc_extents(struct inode *inode, int c, int lastblock, | |
3cc6f844 | 892 | struct kernel_long_ad *laarr, |
cb00ea35 | 893 | int *endnum) |
1da177e4 LT |
894 | { |
895 | int start, length = 0, currlength = 0, i; | |
896 | ||
cb00ea35 | 897 | if (*endnum >= (c + 1)) { |
1da177e4 LT |
898 | if (!lastblock) |
899 | return; | |
900 | else | |
901 | start = c; | |
cb00ea35 | 902 | } else { |
4b11111a MS |
903 | if ((laarr[c + 1].extLength >> 30) == |
904 | (EXT_NOT_RECORDED_ALLOCATED >> 30)) { | |
cb00ea35 | 905 | start = c + 1; |
4b11111a MS |
906 | length = currlength = |
907 | (((laarr[c + 1].extLength & | |
908 | UDF_EXTENT_LENGTH_MASK) + | |
909 | inode->i_sb->s_blocksize - 1) >> | |
910 | inode->i_sb->s_blocksize_bits); | |
911 | } else | |
1da177e4 LT |
912 | start = c; |
913 | } | |
914 | ||
cb00ea35 CG |
915 | for (i = start + 1; i <= *endnum; i++) { |
916 | if (i == *endnum) { | |
1da177e4 LT |
917 | if (lastblock) |
918 | length += UDF_DEFAULT_PREALLOC_BLOCKS; | |
4b11111a MS |
919 | } else if ((laarr[i].extLength >> 30) == |
920 | (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) { | |
921 | length += (((laarr[i].extLength & | |
922 | UDF_EXTENT_LENGTH_MASK) + | |
923 | inode->i_sb->s_blocksize - 1) >> | |
924 | inode->i_sb->s_blocksize_bits); | |
925 | } else | |
1da177e4 LT |
926 | break; |
927 | } | |
928 | ||
cb00ea35 | 929 | if (length) { |
1da177e4 | 930 | int next = laarr[start].extLocation.logicalBlockNum + |
28de7948 | 931 | (((laarr[start].extLength & UDF_EXTENT_LENGTH_MASK) + |
4b11111a MS |
932 | inode->i_sb->s_blocksize - 1) >> |
933 | inode->i_sb->s_blocksize_bits); | |
1da177e4 | 934 | int numalloc = udf_prealloc_blocks(inode->i_sb, inode, |
4b11111a MS |
935 | laarr[start].extLocation.partitionReferenceNum, |
936 | next, (UDF_DEFAULT_PREALLOC_BLOCKS > length ? | |
937 | length : UDF_DEFAULT_PREALLOC_BLOCKS) - | |
938 | currlength); | |
28de7948 | 939 | if (numalloc) { |
4b11111a | 940 | if (start == (c + 1)) |
1da177e4 | 941 | laarr[start].extLength += |
4b11111a MS |
942 | (numalloc << |
943 | inode->i_sb->s_blocksize_bits); | |
944 | else { | |
cb00ea35 | 945 | memmove(&laarr[c + 2], &laarr[c + 1], |
5ca4e4be | 946 | sizeof(struct long_ad) * (*endnum - (c + 1))); |
cb00ea35 CG |
947 | (*endnum)++; |
948 | laarr[c + 1].extLocation.logicalBlockNum = next; | |
949 | laarr[c + 1].extLocation.partitionReferenceNum = | |
4b11111a MS |
950 | laarr[c].extLocation. |
951 | partitionReferenceNum; | |
952 | laarr[c + 1].extLength = | |
953 | EXT_NOT_RECORDED_ALLOCATED | | |
954 | (numalloc << | |
955 | inode->i_sb->s_blocksize_bits); | |
cb00ea35 | 956 | start = c + 1; |
1da177e4 LT |
957 | } |
958 | ||
cb00ea35 | 959 | for (i = start + 1; numalloc && i < *endnum; i++) { |
4b11111a MS |
960 | int elen = ((laarr[i].extLength & |
961 | UDF_EXTENT_LENGTH_MASK) + | |
962 | inode->i_sb->s_blocksize - 1) >> | |
963 | inode->i_sb->s_blocksize_bits; | |
1da177e4 | 964 | |
cb00ea35 | 965 | if (elen > numalloc) { |
1da177e4 | 966 | laarr[i].extLength -= |
4b11111a MS |
967 | (numalloc << |
968 | inode->i_sb->s_blocksize_bits); | |
1da177e4 | 969 | numalloc = 0; |
cb00ea35 | 970 | } else { |
1da177e4 | 971 | numalloc -= elen; |
cb00ea35 | 972 | if (*endnum > (i + 1)) |
4b11111a MS |
973 | memmove(&laarr[i], |
974 | &laarr[i + 1], | |
5ca4e4be | 975 | sizeof(struct long_ad) * |
4b11111a | 976 | (*endnum - (i + 1))); |
cb00ea35 CG |
977 | i--; |
978 | (*endnum)--; | |
1da177e4 LT |
979 | } |
980 | } | |
c0b34438 | 981 | UDF_I(inode)->i_lenExtents += |
4b11111a | 982 | numalloc << inode->i_sb->s_blocksize_bits; |
1da177e4 LT |
983 | } |
984 | } | |
985 | } | |
986 | ||
3cc6f844 | 987 | static void udf_merge_extents(struct inode *inode, struct kernel_long_ad *laarr, |
cb00ea35 | 988 | int *endnum) |
1da177e4 LT |
989 | { |
990 | int i; | |
4b11111a MS |
991 | unsigned long blocksize = inode->i_sb->s_blocksize; |
992 | unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; | |
1da177e4 | 993 | |
cb00ea35 | 994 | for (i = 0; i < (*endnum - 1); i++) { |
5ca4e4be PE |
995 | struct kernel_long_ad *li /*l[i]*/ = &laarr[i]; |
996 | struct kernel_long_ad *lip1 /*l[i plus 1]*/ = &laarr[i + 1]; | |
4b11111a MS |
997 | |
998 | if (((li->extLength >> 30) == (lip1->extLength >> 30)) && | |
999 | (((li->extLength >> 30) == | |
1000 | (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) || | |
1001 | ((lip1->extLocation.logicalBlockNum - | |
1002 | li->extLocation.logicalBlockNum) == | |
1003 | (((li->extLength & UDF_EXTENT_LENGTH_MASK) + | |
1004 | blocksize - 1) >> blocksize_bits)))) { | |
1005 | ||
1006 | if (((li->extLength & UDF_EXTENT_LENGTH_MASK) + | |
53cafe1d JK |
1007 | (lip1->extLength & UDF_EXTENT_LENGTH_MASK) + |
1008 | blocksize - 1) <= UDF_EXTENT_LENGTH_MASK) { | |
4b11111a MS |
1009 | li->extLength = lip1->extLength + |
1010 | (((li->extLength & | |
1011 | UDF_EXTENT_LENGTH_MASK) + | |
1012 | blocksize - 1) & ~(blocksize - 1)); | |
1013 | if (*endnum > (i + 2)) | |
1014 | memmove(&laarr[i + 1], &laarr[i + 2], | |
5ca4e4be | 1015 | sizeof(struct long_ad) * |
4b11111a MS |
1016 | (*endnum - (i + 2))); |
1017 | i--; | |
1018 | (*endnum)--; | |
1da177e4 | 1019 | } |
4b11111a MS |
1020 | } else if (((li->extLength >> 30) == |
1021 | (EXT_NOT_RECORDED_ALLOCATED >> 30)) && | |
1022 | ((lip1->extLength >> 30) == | |
1023 | (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))) { | |
97e961fd | 1024 | udf_free_blocks(inode->i_sb, inode, &li->extLocation, 0, |
4b11111a MS |
1025 | ((li->extLength & |
1026 | UDF_EXTENT_LENGTH_MASK) + | |
1027 | blocksize - 1) >> blocksize_bits); | |
1028 | li->extLocation.logicalBlockNum = 0; | |
1029 | li->extLocation.partitionReferenceNum = 0; | |
1030 | ||
1031 | if (((li->extLength & UDF_EXTENT_LENGTH_MASK) + | |
1032 | (lip1->extLength & UDF_EXTENT_LENGTH_MASK) + | |
1033 | blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) { | |
1034 | lip1->extLength = (lip1->extLength - | |
1035 | (li->extLength & | |
1036 | UDF_EXTENT_LENGTH_MASK) + | |
1037 | UDF_EXTENT_LENGTH_MASK) & | |
1038 | ~(blocksize - 1); | |
1039 | li->extLength = (li->extLength & | |
1040 | UDF_EXTENT_FLAG_MASK) + | |
1041 | (UDF_EXTENT_LENGTH_MASK + 1) - | |
1042 | blocksize; | |
cb00ea35 | 1043 | } else { |
4b11111a MS |
1044 | li->extLength = lip1->extLength + |
1045 | (((li->extLength & | |
1046 | UDF_EXTENT_LENGTH_MASK) + | |
1047 | blocksize - 1) & ~(blocksize - 1)); | |
cb00ea35 CG |
1048 | if (*endnum > (i + 2)) |
1049 | memmove(&laarr[i + 1], &laarr[i + 2], | |
5ca4e4be | 1050 | sizeof(struct long_ad) * |
4b11111a | 1051 | (*endnum - (i + 2))); |
cb00ea35 CG |
1052 | i--; |
1053 | (*endnum)--; | |
1da177e4 | 1054 | } |
4b11111a MS |
1055 | } else if ((li->extLength >> 30) == |
1056 | (EXT_NOT_RECORDED_ALLOCATED >> 30)) { | |
1057 | udf_free_blocks(inode->i_sb, inode, | |
97e961fd | 1058 | &li->extLocation, 0, |
4b11111a MS |
1059 | ((li->extLength & |
1060 | UDF_EXTENT_LENGTH_MASK) + | |
1061 | blocksize - 1) >> blocksize_bits); | |
1062 | li->extLocation.logicalBlockNum = 0; | |
1063 | li->extLocation.partitionReferenceNum = 0; | |
1064 | li->extLength = (li->extLength & | |
1065 | UDF_EXTENT_LENGTH_MASK) | | |
1066 | EXT_NOT_RECORDED_NOT_ALLOCATED; | |
1da177e4 LT |
1067 | } |
1068 | } | |
1069 | } | |
1070 | ||
19fd80de JK |
1071 | static int udf_update_extents(struct inode *inode, struct kernel_long_ad *laarr, |
1072 | int startnum, int endnum, | |
1073 | struct extent_position *epos) | |
1da177e4 LT |
1074 | { |
1075 | int start = 0, i; | |
5ca4e4be | 1076 | struct kernel_lb_addr tmploc; |
1da177e4 | 1077 | uint32_t tmplen; |
19fd80de | 1078 | int err; |
1da177e4 | 1079 | |
cb00ea35 CG |
1080 | if (startnum > endnum) { |
1081 | for (i = 0; i < (startnum - endnum); i++) | |
6c1e4d06 | 1082 | udf_delete_aext(inode, *epos); |
cb00ea35 CG |
1083 | } else if (startnum < endnum) { |
1084 | for (i = 0; i < (endnum - startnum); i++) { | |
19fd80de JK |
1085 | err = udf_insert_aext(inode, *epos, |
1086 | laarr[i].extLocation, | |
1087 | laarr[i].extLength); | |
1088 | /* | |
1089 | * If we fail here, we are likely corrupting the extent | |
1090 | * list and leaking blocks. At least stop early to | |
1091 | * limit the damage. | |
1092 | */ | |
1093 | if (err < 0) | |
1094 | return err; | |
ff116fc8 | 1095 | udf_next_aext(inode, epos, &laarr[i].extLocation, |
cb00ea35 CG |
1096 | &laarr[i].extLength, 1); |
1097 | start++; | |
1da177e4 LT |
1098 | } |
1099 | } | |
1100 | ||
cb00ea35 | 1101 | for (i = start; i < endnum; i++) { |
ff116fc8 | 1102 | udf_next_aext(inode, epos, &tmploc, &tmplen, 0); |
97e961fd | 1103 | udf_write_aext(inode, epos, &laarr[i].extLocation, |
cb00ea35 | 1104 | laarr[i].extLength, 1); |
1da177e4 | 1105 | } |
19fd80de | 1106 | return 0; |
1da177e4 LT |
1107 | } |
1108 | ||
b490bdd6 | 1109 | struct buffer_head *udf_bread(struct inode *inode, udf_pblk_t block, |
cb00ea35 | 1110 | int create, int *err) |
1da177e4 | 1111 | { |
cb00ea35 | 1112 | struct buffer_head *bh = NULL; |
32f123a3 JK |
1113 | struct udf_map_rq map = { |
1114 | .lblk = block, | |
1115 | .iflags = UDF_MAP_NOPREALLOC | (create ? UDF_MAP_CREATE : 0), | |
1116 | }; | |
1da177e4 | 1117 | |
32f123a3 JK |
1118 | *err = udf_map_block(inode, &map); |
1119 | if (*err || !(map.oflags & UDF_BLK_MAPPED)) | |
1120 | return NULL; | |
1121 | ||
1122 | bh = sb_getblk(inode->i_sb, map.pblk); | |
1123 | if (!bh) { | |
1124 | *err = -ENOMEM; | |
1da177e4 | 1125 | return NULL; |
32f123a3 JK |
1126 | } |
1127 | if (map.oflags & UDF_BLK_NEW) { | |
1128 | lock_buffer(bh); | |
1129 | memset(bh->b_data, 0x00, inode->i_sb->s_blocksize); | |
1130 | set_buffer_uptodate(bh); | |
1131 | unlock_buffer(bh); | |
1132 | mark_buffer_dirty_inode(bh, inode); | |
1133 | return bh; | |
1134 | } | |
1da177e4 | 1135 | |
59a16786 | 1136 | if (bh_read(bh, 0) >= 0) |
1da177e4 | 1137 | return bh; |
28de7948 | 1138 | |
1da177e4 LT |
1139 | brelse(bh); |
1140 | *err = -EIO; | |
1141 | return NULL; | |
1142 | } | |
1143 | ||
7e49b6f2 | 1144 | int udf_setsize(struct inode *inode, loff_t newsize) |
1da177e4 | 1145 | { |
1da177e4 | 1146 | int err; |
48d6d8ff | 1147 | struct udf_inode_info *iinfo; |
89a4d970 | 1148 | unsigned int bsize = i_blocksize(inode); |
1da177e4 LT |
1149 | |
1150 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || | |
cb00ea35 | 1151 | S_ISLNK(inode->i_mode))) |
7e49b6f2 | 1152 | return -EINVAL; |
1da177e4 | 1153 | if (IS_APPEND(inode) || IS_IMMUTABLE(inode)) |
7e49b6f2 | 1154 | return -EPERM; |
1da177e4 | 1155 | |
48d6d8ff | 1156 | iinfo = UDF_I(inode); |
7e49b6f2 | 1157 | if (newsize > inode->i_size) { |
7e49b6f2 | 1158 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { |
6a3b37e0 | 1159 | if (bsize >= |
7e49b6f2 | 1160 | (udf_file_entry_alloc_offset(inode) + newsize)) { |
d2eb8c35 | 1161 | down_write(&iinfo->i_data_sem); |
7e49b6f2 | 1162 | iinfo->i_lenAlloc = newsize; |
bb2b6d19 IA |
1163 | goto set_size; |
1164 | } | |
6a3b37e0 JK |
1165 | err = udf_expand_file_adinicb(inode); |
1166 | if (err) | |
1167 | return err; | |
7e49b6f2 | 1168 | } |
6a3b37e0 | 1169 | down_write(&iinfo->i_data_sem); |
7e49b6f2 JK |
1170 | err = udf_extend_file(inode, newsize); |
1171 | if (err) { | |
1172 | up_write(&iinfo->i_data_sem); | |
1173 | return err; | |
1da177e4 | 1174 | } |
bb2b6d19 | 1175 | set_size: |
4d0fb621 | 1176 | up_write(&iinfo->i_data_sem); |
f2e95355 | 1177 | truncate_setsize(inode, newsize); |
cb00ea35 | 1178 | } else { |
7e49b6f2 JK |
1179 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { |
1180 | down_write(&iinfo->i_data_sem); | |
99600051 | 1181 | udf_clear_extent_cache(inode); |
382a2287 | 1182 | memset(iinfo->i_data + iinfo->i_lenEAttr + newsize, |
7e49b6f2 JK |
1183 | 0x00, bsize - newsize - |
1184 | udf_file_entry_alloc_offset(inode)); | |
1185 | iinfo->i_lenAlloc = newsize; | |
1186 | truncate_setsize(inode, newsize); | |
1187 | up_write(&iinfo->i_data_sem); | |
1188 | goto update_time; | |
1189 | } | |
1190 | err = block_truncate_page(inode->i_mapping, newsize, | |
1191 | udf_get_block); | |
1192 | if (err) | |
1193 | return err; | |
f2e95355 | 1194 | truncate_setsize(inode, newsize); |
4d0fb621 | 1195 | down_write(&iinfo->i_data_sem); |
99600051 | 1196 | udf_clear_extent_cache(inode); |
2b42be5e | 1197 | err = udf_truncate_extents(inode); |
4d0fb621 | 1198 | up_write(&iinfo->i_data_sem); |
2b42be5e JK |
1199 | if (err) |
1200 | return err; | |
647bd61a | 1201 | } |
7e49b6f2 | 1202 | update_time: |
c2050a45 | 1203 | inode->i_mtime = inode->i_ctime = current_time(inode); |
1da177e4 | 1204 | if (IS_SYNC(inode)) |
cb00ea35 | 1205 | udf_sync_inode(inode); |
1da177e4 LT |
1206 | else |
1207 | mark_inode_dirty(inode); | |
7e49b6f2 | 1208 | return 0; |
1da177e4 LT |
1209 | } |
1210 | ||
c03aa9f6 JK |
1211 | /* |
1212 | * Maximum length of linked list formed by ICB hierarchy. The chosen number is | |
1213 | * arbitrary - just that we hopefully don't limit any real use of rewritten | |
1214 | * inode on write-once media but avoid looping for too long on corrupted media. | |
1215 | */ | |
1216 | #define UDF_MAX_ICB_NESTING 1024 | |
1217 | ||
6174c2eb | 1218 | static int udf_read_inode(struct inode *inode, bool hidden_inode) |
1da177e4 LT |
1219 | { |
1220 | struct buffer_head *bh = NULL; | |
1221 | struct fileEntry *fe; | |
bb7720a0 | 1222 | struct extendedFileEntry *efe; |
1da177e4 | 1223 | uint16_t ident; |
48d6d8ff | 1224 | struct udf_inode_info *iinfo = UDF_I(inode); |
bb7720a0 | 1225 | struct udf_sb_info *sbi = UDF_SB(inode->i_sb); |
6d3d5e86 | 1226 | struct kernel_lb_addr *iloc = &iinfo->i_location; |
bb7720a0 | 1227 | unsigned int link_count; |
c03aa9f6 | 1228 | unsigned int indirections = 0; |
79144954 | 1229 | int bs = inode->i_sb->s_blocksize; |
6d3d5e86 | 1230 | int ret = -EIO; |
0c9850f4 | 1231 | uint32_t uid, gid; |
1da177e4 | 1232 | |
c03aa9f6 | 1233 | reread: |
1d82a56b | 1234 | if (iloc->partitionReferenceNum >= sbi->s_partitions) { |
fcbf7637 | 1235 | udf_debug("partition reference: %u > logical volume partitions: %u\n", |
1d82a56b FF |
1236 | iloc->partitionReferenceNum, sbi->s_partitions); |
1237 | return -EIO; | |
1238 | } | |
1239 | ||
6d3d5e86 JK |
1240 | if (iloc->logicalBlockNum >= |
1241 | sbi->s_partmaps[iloc->partitionReferenceNum].s_partition_len) { | |
fcbf7637 | 1242 | udf_debug("block=%u, partition=%u out of range\n", |
6d3d5e86 JK |
1243 | iloc->logicalBlockNum, iloc->partitionReferenceNum); |
1244 | return -EIO; | |
1245 | } | |
1246 | ||
1da177e4 LT |
1247 | /* |
1248 | * Set defaults, but the inode is still incomplete! | |
1249 | * Note: get_new_inode() sets the following on a new inode: | |
1250 | * i_sb = sb | |
1251 | * i_no = ino | |
1252 | * i_flags = sb->s_flags | |
1253 | * i_state = 0 | |
1254 | * clean_inode(): zero fills and sets | |
1255 | * i_count = 1 | |
1256 | * i_nlink = 1 | |
1257 | * i_op = NULL; | |
1258 | */ | |
6d3d5e86 | 1259 | bh = udf_read_ptagged(inode->i_sb, iloc, 0, &ident); |
cb00ea35 | 1260 | if (!bh) { |
fcbf7637 | 1261 | udf_err(inode->i_sb, "(ino %lu) failed !bh\n", inode->i_ino); |
6d3d5e86 | 1262 | return -EIO; |
1da177e4 LT |
1263 | } |
1264 | ||
1265 | if (ident != TAG_IDENT_FE && ident != TAG_IDENT_EFE && | |
cb00ea35 | 1266 | ident != TAG_IDENT_USE) { |
fcbf7637 | 1267 | udf_err(inode->i_sb, "(ino %lu) failed ident=%u\n", |
78ace70c | 1268 | inode->i_ino, ident); |
6d3d5e86 | 1269 | goto out; |
1da177e4 LT |
1270 | } |
1271 | ||
1272 | fe = (struct fileEntry *)bh->b_data; | |
bb7720a0 | 1273 | efe = (struct extendedFileEntry *)bh->b_data; |
1da177e4 | 1274 | |
5e0f0017 | 1275 | if (fe->icbTag.strategyType == cpu_to_le16(4096)) { |
1ab92785 | 1276 | struct buffer_head *ibh; |
1da177e4 | 1277 | |
6d3d5e86 | 1278 | ibh = udf_read_ptagged(inode->i_sb, iloc, 1, &ident); |
1ab92785 | 1279 | if (ident == TAG_IDENT_IE && ibh) { |
5ca4e4be | 1280 | struct kernel_lb_addr loc; |
1ab92785 | 1281 | struct indirectEntry *ie; |
1282 | ||
1283 | ie = (struct indirectEntry *)ibh->b_data; | |
1284 | loc = lelb_to_cpu(ie->indirectICB.extLocation); | |
1285 | ||
c03aa9f6 | 1286 | if (ie->indirectICB.extLength) { |
c03aa9f6 JK |
1287 | brelse(ibh); |
1288 | memcpy(&iinfo->i_location, &loc, | |
1289 | sizeof(struct kernel_lb_addr)); | |
1290 | if (++indirections > UDF_MAX_ICB_NESTING) { | |
1291 | udf_err(inode->i_sb, | |
1292 | "too many ICBs in ICB hierarchy" | |
1293 | " (max %d supported)\n", | |
1294 | UDF_MAX_ICB_NESTING); | |
6d3d5e86 | 1295 | goto out; |
28de7948 | 1296 | } |
6d3d5e86 | 1297 | brelse(bh); |
c03aa9f6 | 1298 | goto reread; |
1da177e4 | 1299 | } |
28de7948 | 1300 | } |
1ab92785 | 1301 | brelse(ibh); |
5e0f0017 | 1302 | } else if (fe->icbTag.strategyType != cpu_to_le16(4)) { |
fcbf7637 | 1303 | udf_err(inode->i_sb, "unsupported strategy type: %u\n", |
78ace70c | 1304 | le16_to_cpu(fe->icbTag.strategyType)); |
6d3d5e86 | 1305 | goto out; |
1da177e4 | 1306 | } |
5e0f0017 | 1307 | if (fe->icbTag.strategyType == cpu_to_le16(4)) |
48d6d8ff | 1308 | iinfo->i_strat4096 = 0; |
5e0f0017 | 1309 | else /* if (fe->icbTag.strategyType == cpu_to_le16(4096)) */ |
48d6d8ff | 1310 | iinfo->i_strat4096 = 1; |
1da177e4 | 1311 | |
48d6d8ff | 1312 | iinfo->i_alloc_type = le16_to_cpu(fe->icbTag.flags) & |
4b11111a | 1313 | ICBTAG_FLAG_AD_MASK; |
d288d958 JK |
1314 | if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_SHORT && |
1315 | iinfo->i_alloc_type != ICBTAG_FLAG_AD_LONG && | |
1316 | iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { | |
1317 | ret = -EIO; | |
1318 | goto out; | |
1319 | } | |
fc8033a3 | 1320 | iinfo->i_hidden = hidden_inode; |
48d6d8ff MS |
1321 | iinfo->i_unique = 0; |
1322 | iinfo->i_lenEAttr = 0; | |
1323 | iinfo->i_lenExtents = 0; | |
1324 | iinfo->i_lenAlloc = 0; | |
1325 | iinfo->i_next_alloc_block = 0; | |
1326 | iinfo->i_next_alloc_goal = 0; | |
5e0f0017 | 1327 | if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_EFE)) { |
48d6d8ff MS |
1328 | iinfo->i_efe = 1; |
1329 | iinfo->i_use = 0; | |
79144954 | 1330 | ret = udf_alloc_i_data(inode, bs - |
6d3d5e86 JK |
1331 | sizeof(struct extendedFileEntry)); |
1332 | if (ret) | |
1333 | goto out; | |
382a2287 | 1334 | memcpy(iinfo->i_data, |
4b11111a | 1335 | bh->b_data + sizeof(struct extendedFileEntry), |
79144954 | 1336 | bs - sizeof(struct extendedFileEntry)); |
5e0f0017 | 1337 | } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_FE)) { |
48d6d8ff MS |
1338 | iinfo->i_efe = 0; |
1339 | iinfo->i_use = 0; | |
79144954 | 1340 | ret = udf_alloc_i_data(inode, bs - sizeof(struct fileEntry)); |
6d3d5e86 JK |
1341 | if (ret) |
1342 | goto out; | |
382a2287 | 1343 | memcpy(iinfo->i_data, |
c0b34438 | 1344 | bh->b_data + sizeof(struct fileEntry), |
79144954 | 1345 | bs - sizeof(struct fileEntry)); |
5e0f0017 | 1346 | } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_USE)) { |
48d6d8ff MS |
1347 | iinfo->i_efe = 0; |
1348 | iinfo->i_use = 1; | |
1349 | iinfo->i_lenAlloc = le32_to_cpu( | |
4b11111a MS |
1350 | ((struct unallocSpaceEntry *)bh->b_data)-> |
1351 | lengthAllocDescs); | |
79144954 | 1352 | ret = udf_alloc_i_data(inode, bs - |
6d3d5e86 JK |
1353 | sizeof(struct unallocSpaceEntry)); |
1354 | if (ret) | |
1355 | goto out; | |
382a2287 | 1356 | memcpy(iinfo->i_data, |
4b11111a | 1357 | bh->b_data + sizeof(struct unallocSpaceEntry), |
79144954 | 1358 | bs - sizeof(struct unallocSpaceEntry)); |
6d3d5e86 | 1359 | return 0; |
1da177e4 LT |
1360 | } |
1361 | ||
6d3d5e86 | 1362 | ret = -EIO; |
c03cad24 | 1363 | read_lock(&sbi->s_cred_lock); |
0c9850f4 JK |
1364 | uid = le32_to_cpu(fe->uid); |
1365 | if (uid == UDF_INVALID_ID || | |
ca76d2d8 | 1366 | UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_SET)) |
0c9850f4 JK |
1367 | inode->i_uid = sbi->s_uid; |
1368 | else | |
1369 | i_uid_write(inode, uid); | |
1da177e4 | 1370 | |
0c9850f4 JK |
1371 | gid = le32_to_cpu(fe->gid); |
1372 | if (gid == UDF_INVALID_ID || | |
ca76d2d8 | 1373 | UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_SET)) |
0c9850f4 JK |
1374 | inode->i_gid = sbi->s_gid; |
1375 | else | |
1376 | i_gid_write(inode, gid); | |
1da177e4 | 1377 | |
7ac9bcd5 | 1378 | if (fe->icbTag.fileType != ICBTAG_FILE_TYPE_DIRECTORY && |
87bc730c | 1379 | sbi->s_fmode != UDF_INVALID_MODE) |
7ac9bcd5 MS |
1380 | inode->i_mode = sbi->s_fmode; |
1381 | else if (fe->icbTag.fileType == ICBTAG_FILE_TYPE_DIRECTORY && | |
87bc730c | 1382 | sbi->s_dmode != UDF_INVALID_MODE) |
7ac9bcd5 MS |
1383 | inode->i_mode = sbi->s_dmode; |
1384 | else | |
1385 | inode->i_mode = udf_convert_permissions(fe); | |
1386 | inode->i_mode &= ~sbi->s_umask; | |
c3367a1b SM |
1387 | iinfo->i_extraPerms = le32_to_cpu(fe->permissions) & ~FE_MAPPED_PERMS; |
1388 | ||
c03cad24 JK |
1389 | read_unlock(&sbi->s_cred_lock); |
1390 | ||
bfe86848 | 1391 | link_count = le16_to_cpu(fe->fileLinkCount); |
4071b913 | 1392 | if (!link_count) { |
6174c2eb JK |
1393 | if (!hidden_inode) { |
1394 | ret = -ESTALE; | |
1395 | goto out; | |
1396 | } | |
1397 | link_count = 1; | |
4071b913 | 1398 | } |
bfe86848 | 1399 | set_nlink(inode, link_count); |
c03cad24 JK |
1400 | |
1401 | inode->i_size = le64_to_cpu(fe->informationLength); | |
1402 | iinfo->i_lenExtents = inode->i_size; | |
1da177e4 | 1403 | |
48d6d8ff | 1404 | if (iinfo->i_efe == 0) { |
1da177e4 | 1405 | inode->i_blocks = le64_to_cpu(fe->logicalBlocksRecorded) << |
28de7948 | 1406 | (inode->i_sb->s_blocksize_bits - 9); |
1da177e4 | 1407 | |
c3b9cecd AB |
1408 | udf_disk_stamp_to_time(&inode->i_atime, fe->accessTime); |
1409 | udf_disk_stamp_to_time(&inode->i_mtime, fe->modificationTime); | |
1410 | udf_disk_stamp_to_time(&inode->i_ctime, fe->attrTime); | |
1da177e4 | 1411 | |
48d6d8ff MS |
1412 | iinfo->i_unique = le64_to_cpu(fe->uniqueID); |
1413 | iinfo->i_lenEAttr = le32_to_cpu(fe->lengthExtendedAttr); | |
1414 | iinfo->i_lenAlloc = le32_to_cpu(fe->lengthAllocDescs); | |
d5e2cf07 | 1415 | iinfo->i_checkpoint = le32_to_cpu(fe->checkpoint); |
ab9a3a73 SM |
1416 | iinfo->i_streamdir = 0; |
1417 | iinfo->i_lenStreams = 0; | |
cb00ea35 | 1418 | } else { |
647bd61a | 1419 | inode->i_blocks = le64_to_cpu(efe->logicalBlocksRecorded) << |
cb00ea35 | 1420 | (inode->i_sb->s_blocksize_bits - 9); |
1da177e4 | 1421 | |
c3b9cecd AB |
1422 | udf_disk_stamp_to_time(&inode->i_atime, efe->accessTime); |
1423 | udf_disk_stamp_to_time(&inode->i_mtime, efe->modificationTime); | |
0220edda | 1424 | udf_disk_stamp_to_time(&iinfo->i_crtime, efe->createTime); |
c3b9cecd | 1425 | udf_disk_stamp_to_time(&inode->i_ctime, efe->attrTime); |
1da177e4 | 1426 | |
48d6d8ff MS |
1427 | iinfo->i_unique = le64_to_cpu(efe->uniqueID); |
1428 | iinfo->i_lenEAttr = le32_to_cpu(efe->lengthExtendedAttr); | |
1429 | iinfo->i_lenAlloc = le32_to_cpu(efe->lengthAllocDescs); | |
d5e2cf07 | 1430 | iinfo->i_checkpoint = le32_to_cpu(efe->checkpoint); |
ab9a3a73 SM |
1431 | |
1432 | /* Named streams */ | |
1433 | iinfo->i_streamdir = (efe->streamDirectoryICB.extLength != 0); | |
1434 | iinfo->i_locStreamdir = | |
1435 | lelb_to_cpu(efe->streamDirectoryICB.extLocation); | |
1436 | iinfo->i_lenStreams = le64_to_cpu(efe->objectSize); | |
1437 | if (iinfo->i_lenStreams >= inode->i_size) | |
1438 | iinfo->i_lenStreams -= inode->i_size; | |
1439 | else | |
1440 | iinfo->i_lenStreams = 0; | |
1da177e4 | 1441 | } |
470cca56 | 1442 | inode->i_generation = iinfo->i_unique; |
1da177e4 | 1443 | |
23b133bd JK |
1444 | /* |
1445 | * Sanity check length of allocation descriptors and extended attrs to | |
1446 | * avoid integer overflows | |
1447 | */ | |
1448 | if (iinfo->i_lenEAttr > bs || iinfo->i_lenAlloc > bs) | |
1449 | goto out; | |
1450 | /* Now do exact checks */ | |
1451 | if (udf_file_entry_alloc_offset(inode) + iinfo->i_lenAlloc > bs) | |
1452 | goto out; | |
e159332b JK |
1453 | /* Sanity checks for files in ICB so that we don't get confused later */ |
1454 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { | |
1455 | /* | |
1456 | * For file in ICB data is stored in allocation descriptor | |
1457 | * so sizes should match | |
1458 | */ | |
1459 | if (iinfo->i_lenAlloc != inode->i_size) | |
1460 | goto out; | |
1461 | /* File in ICB has to fit in there... */ | |
79144954 | 1462 | if (inode->i_size > bs - udf_file_entry_alloc_offset(inode)) |
e159332b JK |
1463 | goto out; |
1464 | } | |
1465 | ||
cb00ea35 CG |
1466 | switch (fe->icbTag.fileType) { |
1467 | case ICBTAG_FILE_TYPE_DIRECTORY: | |
28de7948 CG |
1468 | inode->i_op = &udf_dir_inode_operations; |
1469 | inode->i_fop = &udf_dir_operations; | |
1470 | inode->i_mode |= S_IFDIR; | |
1471 | inc_nlink(inode); | |
1472 | break; | |
cb00ea35 CG |
1473 | case ICBTAG_FILE_TYPE_REALTIME: |
1474 | case ICBTAG_FILE_TYPE_REGULAR: | |
1475 | case ICBTAG_FILE_TYPE_UNDEF: | |
742e1795 | 1476 | case ICBTAG_FILE_TYPE_VAT20: |
48d6d8ff | 1477 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
28de7948 CG |
1478 | inode->i_data.a_ops = &udf_adinicb_aops; |
1479 | else | |
1480 | inode->i_data.a_ops = &udf_aops; | |
1481 | inode->i_op = &udf_file_inode_operations; | |
1482 | inode->i_fop = &udf_file_operations; | |
1483 | inode->i_mode |= S_IFREG; | |
1484 | break; | |
cb00ea35 | 1485 | case ICBTAG_FILE_TYPE_BLOCK: |
28de7948 CG |
1486 | inode->i_mode |= S_IFBLK; |
1487 | break; | |
cb00ea35 | 1488 | case ICBTAG_FILE_TYPE_CHAR: |
28de7948 CG |
1489 | inode->i_mode |= S_IFCHR; |
1490 | break; | |
cb00ea35 | 1491 | case ICBTAG_FILE_TYPE_FIFO: |
28de7948 CG |
1492 | init_special_inode(inode, inode->i_mode | S_IFIFO, 0); |
1493 | break; | |
cb00ea35 | 1494 | case ICBTAG_FILE_TYPE_SOCKET: |
28de7948 CG |
1495 | init_special_inode(inode, inode->i_mode | S_IFSOCK, 0); |
1496 | break; | |
cb00ea35 | 1497 | case ICBTAG_FILE_TYPE_SYMLINK: |
28de7948 | 1498 | inode->i_data.a_ops = &udf_symlink_aops; |
ad4d0532 | 1499 | inode->i_op = &udf_symlink_inode_operations; |
21fc61c7 | 1500 | inode_nohighmem(inode); |
6ff6b2b3 | 1501 | inode->i_mode = S_IFLNK | 0777; |
28de7948 | 1502 | break; |
bfb257a5 JK |
1503 | case ICBTAG_FILE_TYPE_MAIN: |
1504 | udf_debug("METADATA FILE-----\n"); | |
1505 | break; | |
1506 | case ICBTAG_FILE_TYPE_MIRROR: | |
1507 | udf_debug("METADATA MIRROR FILE-----\n"); | |
1508 | break; | |
1509 | case ICBTAG_FILE_TYPE_BITMAP: | |
1510 | udf_debug("METADATA BITMAP FILE-----\n"); | |
1511 | break; | |
cb00ea35 | 1512 | default: |
fcbf7637 | 1513 | udf_err(inode->i_sb, "(ino %lu) failed unknown file type=%u\n", |
78ace70c | 1514 | inode->i_ino, fe->icbTag.fileType); |
6d3d5e86 | 1515 | goto out; |
1da177e4 | 1516 | } |
cb00ea35 | 1517 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { |
4b11111a MS |
1518 | struct deviceSpec *dsea = |
1519 | (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1); | |
cb00ea35 CG |
1520 | if (dsea) { |
1521 | init_special_inode(inode, inode->i_mode, | |
4b11111a MS |
1522 | MKDEV(le32_to_cpu(dsea->majorDeviceIdent), |
1523 | le32_to_cpu(dsea->minorDeviceIdent))); | |
1da177e4 | 1524 | /* Developer ID ??? */ |
4b11111a | 1525 | } else |
6d3d5e86 | 1526 | goto out; |
1da177e4 | 1527 | } |
6d3d5e86 JK |
1528 | ret = 0; |
1529 | out: | |
bb7720a0 | 1530 | brelse(bh); |
6d3d5e86 | 1531 | return ret; |
1da177e4 LT |
1532 | } |
1533 | ||
647bd61a CG |
1534 | static int udf_alloc_i_data(struct inode *inode, size_t size) |
1535 | { | |
48d6d8ff | 1536 | struct udf_inode_info *iinfo = UDF_I(inode); |
382a2287 JK |
1537 | iinfo->i_data = kmalloc(size, GFP_KERNEL); |
1538 | if (!iinfo->i_data) | |
647bd61a | 1539 | return -ENOMEM; |
647bd61a CG |
1540 | return 0; |
1541 | } | |
1542 | ||
faa17292 | 1543 | static umode_t udf_convert_permissions(struct fileEntry *fe) |
1da177e4 | 1544 | { |
faa17292 | 1545 | umode_t mode; |
1da177e4 LT |
1546 | uint32_t permissions; |
1547 | uint32_t flags; | |
1548 | ||
1549 | permissions = le32_to_cpu(fe->permissions); | |
1550 | flags = le16_to_cpu(fe->icbTag.flags); | |
1551 | ||
6ff6b2b3 FF |
1552 | mode = ((permissions) & 0007) | |
1553 | ((permissions >> 2) & 0070) | | |
1554 | ((permissions >> 4) & 0700) | | |
4b11111a MS |
1555 | ((flags & ICBTAG_FLAG_SETUID) ? S_ISUID : 0) | |
1556 | ((flags & ICBTAG_FLAG_SETGID) ? S_ISGID : 0) | | |
1557 | ((flags & ICBTAG_FLAG_STICKY) ? S_ISVTX : 0); | |
1da177e4 LT |
1558 | |
1559 | return mode; | |
1560 | } | |
1561 | ||
c3367a1b SM |
1562 | void udf_update_extra_perms(struct inode *inode, umode_t mode) |
1563 | { | |
1564 | struct udf_inode_info *iinfo = UDF_I(inode); | |
1565 | ||
1566 | /* | |
1567 | * UDF 2.01 sec. 3.3.3.3 Note 2: | |
1568 | * In Unix, delete permission tracks write | |
1569 | */ | |
1570 | iinfo->i_extraPerms &= ~FE_DELETE_PERMS; | |
1571 | if (mode & 0200) | |
1572 | iinfo->i_extraPerms |= FE_PERM_U_DELETE; | |
1573 | if (mode & 0020) | |
1574 | iinfo->i_extraPerms |= FE_PERM_G_DELETE; | |
1575 | if (mode & 0002) | |
1576 | iinfo->i_extraPerms |= FE_PERM_O_DELETE; | |
1577 | } | |
1578 | ||
a9185b41 | 1579 | int udf_write_inode(struct inode *inode, struct writeback_control *wbc) |
1da177e4 | 1580 | { |
49521de1 | 1581 | return udf_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL); |
1da177e4 LT |
1582 | } |
1583 | ||
49521de1 | 1584 | static int udf_sync_inode(struct inode *inode) |
1da177e4 LT |
1585 | { |
1586 | return udf_update_inode(inode, 1); | |
1587 | } | |
1588 | ||
c3b9cecd | 1589 | static void udf_adjust_time(struct udf_inode_info *iinfo, struct timespec64 time) |
7ed0fbd7 FF |
1590 | { |
1591 | if (iinfo->i_crtime.tv_sec > time.tv_sec || | |
1592 | (iinfo->i_crtime.tv_sec == time.tv_sec && | |
1593 | iinfo->i_crtime.tv_nsec > time.tv_nsec)) | |
1594 | iinfo->i_crtime = time; | |
1595 | } | |
1596 | ||
cb00ea35 | 1597 | static int udf_update_inode(struct inode *inode, int do_sync) |
1da177e4 LT |
1598 | { |
1599 | struct buffer_head *bh = NULL; | |
1600 | struct fileEntry *fe; | |
1601 | struct extendedFileEntry *efe; | |
b2527bfa | 1602 | uint64_t lb_recorded; |
1da177e4 LT |
1603 | uint32_t udfperms; |
1604 | uint16_t icbflags; | |
1605 | uint16_t crclen; | |
1da177e4 | 1606 | int err = 0; |
6c79e987 | 1607 | struct udf_sb_info *sbi = UDF_SB(inode->i_sb); |
4b11111a | 1608 | unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; |
48d6d8ff | 1609 | struct udf_inode_info *iinfo = UDF_I(inode); |
1da177e4 | 1610 | |
101ee137 | 1611 | bh = sb_getblk(inode->i_sb, |
5833ded9 | 1612 | udf_get_lb_pblock(inode->i_sb, &iinfo->i_location, 0)); |
cb00ea35 | 1613 | if (!bh) { |
aae917cd | 1614 | udf_debug("getblk failure\n"); |
0fd2ba36 | 1615 | return -EIO; |
1da177e4 LT |
1616 | } |
1617 | ||
aae917cd JK |
1618 | lock_buffer(bh); |
1619 | memset(bh->b_data, 0, inode->i_sb->s_blocksize); | |
1da177e4 LT |
1620 | fe = (struct fileEntry *)bh->b_data; |
1621 | efe = (struct extendedFileEntry *)bh->b_data; | |
1622 | ||
aae917cd | 1623 | if (iinfo->i_use) { |
1da177e4 | 1624 | struct unallocSpaceEntry *use = |
28de7948 | 1625 | (struct unallocSpaceEntry *)bh->b_data; |
1da177e4 | 1626 | |
48d6d8ff | 1627 | use->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc); |
4b11111a | 1628 | memcpy(bh->b_data + sizeof(struct unallocSpaceEntry), |
382a2287 | 1629 | iinfo->i_data, inode->i_sb->s_blocksize - |
4b11111a | 1630 | sizeof(struct unallocSpaceEntry)); |
aae917cd | 1631 | use->descTag.tagIdent = cpu_to_le16(TAG_IDENT_USE); |
70f19f58 | 1632 | crclen = sizeof(struct unallocSpaceEntry); |
1da177e4 | 1633 | |
70f19f58 | 1634 | goto finish; |
1da177e4 LT |
1635 | } |
1636 | ||
4d6660eb | 1637 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_FORGET)) |
0c9850f4 | 1638 | fe->uid = cpu_to_le32(UDF_INVALID_ID); |
cb00ea35 | 1639 | else |
c2ba138a | 1640 | fe->uid = cpu_to_le32(i_uid_read(inode)); |
1da177e4 | 1641 | |
4d6660eb | 1642 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_FORGET)) |
0c9850f4 | 1643 | fe->gid = cpu_to_le32(UDF_INVALID_ID); |
cb00ea35 | 1644 | else |
c2ba138a | 1645 | fe->gid = cpu_to_le32(i_gid_read(inode)); |
1da177e4 | 1646 | |
6ff6b2b3 FF |
1647 | udfperms = ((inode->i_mode & 0007)) | |
1648 | ((inode->i_mode & 0070) << 2) | | |
1649 | ((inode->i_mode & 0700) << 4); | |
1da177e4 | 1650 | |
c3367a1b | 1651 | udfperms |= iinfo->i_extraPerms; |
1da177e4 LT |
1652 | fe->permissions = cpu_to_le32(udfperms); |
1653 | ||
8a70ee33 | 1654 | if (S_ISDIR(inode->i_mode) && inode->i_nlink > 0) |
1da177e4 | 1655 | fe->fileLinkCount = cpu_to_le16(inode->i_nlink - 1); |
fc8033a3 JK |
1656 | else { |
1657 | if (iinfo->i_hidden) | |
1658 | fe->fileLinkCount = cpu_to_le16(0); | |
1659 | else | |
1660 | fe->fileLinkCount = cpu_to_le16(inode->i_nlink); | |
1661 | } | |
1da177e4 LT |
1662 | |
1663 | fe->informationLength = cpu_to_le64(inode->i_size); | |
1664 | ||
cb00ea35 | 1665 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { |
5ca4e4be | 1666 | struct regid *eid; |
28de7948 CG |
1667 | struct deviceSpec *dsea = |
1668 | (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1); | |
cb00ea35 | 1669 | if (!dsea) { |
1da177e4 | 1670 | dsea = (struct deviceSpec *) |
28de7948 CG |
1671 | udf_add_extendedattr(inode, |
1672 | sizeof(struct deviceSpec) + | |
5ca4e4be | 1673 | sizeof(struct regid), 12, 0x3); |
1da177e4 LT |
1674 | dsea->attrType = cpu_to_le32(12); |
1675 | dsea->attrSubtype = 1; | |
4b11111a MS |
1676 | dsea->attrLength = cpu_to_le32( |
1677 | sizeof(struct deviceSpec) + | |
5ca4e4be PE |
1678 | sizeof(struct regid)); |
1679 | dsea->impUseLength = cpu_to_le32(sizeof(struct regid)); | |
1da177e4 | 1680 | } |
5ca4e4be | 1681 | eid = (struct regid *)dsea->impUse; |
033c9da0 | 1682 | memset(eid, 0, sizeof(*eid)); |
1da177e4 LT |
1683 | strcpy(eid->ident, UDF_ID_DEVELOPER); |
1684 | eid->identSuffix[0] = UDF_OS_CLASS_UNIX; | |
1685 | eid->identSuffix[1] = UDF_OS_ID_LINUX; | |
1686 | dsea->majorDeviceIdent = cpu_to_le32(imajor(inode)); | |
1687 | dsea->minorDeviceIdent = cpu_to_le32(iminor(inode)); | |
1688 | } | |
1689 | ||
b2527bfa SN |
1690 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1691 | lb_recorded = 0; /* No extents => no blocks! */ | |
1692 | else | |
1693 | lb_recorded = | |
1694 | (inode->i_blocks + (1 << (blocksize_bits - 9)) - 1) >> | |
1695 | (blocksize_bits - 9); | |
1696 | ||
48d6d8ff | 1697 | if (iinfo->i_efe == 0) { |
c0b34438 | 1698 | memcpy(bh->b_data + sizeof(struct fileEntry), |
382a2287 | 1699 | iinfo->i_data, |
cb00ea35 | 1700 | inode->i_sb->s_blocksize - sizeof(struct fileEntry)); |
b2527bfa | 1701 | fe->logicalBlocksRecorded = cpu_to_le64(lb_recorded); |
1da177e4 | 1702 | |
c3b9cecd AB |
1703 | udf_time_to_disk_stamp(&fe->accessTime, inode->i_atime); |
1704 | udf_time_to_disk_stamp(&fe->modificationTime, inode->i_mtime); | |
1705 | udf_time_to_disk_stamp(&fe->attrTime, inode->i_ctime); | |
5ca4e4be | 1706 | memset(&(fe->impIdent), 0, sizeof(struct regid)); |
1da177e4 LT |
1707 | strcpy(fe->impIdent.ident, UDF_ID_DEVELOPER); |
1708 | fe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; | |
1709 | fe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; | |
48d6d8ff MS |
1710 | fe->uniqueID = cpu_to_le64(iinfo->i_unique); |
1711 | fe->lengthExtendedAttr = cpu_to_le32(iinfo->i_lenEAttr); | |
1712 | fe->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc); | |
d5e2cf07 | 1713 | fe->checkpoint = cpu_to_le32(iinfo->i_checkpoint); |
1da177e4 LT |
1714 | fe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_FE); |
1715 | crclen = sizeof(struct fileEntry); | |
cb00ea35 | 1716 | } else { |
4b11111a | 1717 | memcpy(bh->b_data + sizeof(struct extendedFileEntry), |
382a2287 | 1718 | iinfo->i_data, |
4b11111a MS |
1719 | inode->i_sb->s_blocksize - |
1720 | sizeof(struct extendedFileEntry)); | |
ab9a3a73 SM |
1721 | efe->objectSize = |
1722 | cpu_to_le64(inode->i_size + iinfo->i_lenStreams); | |
b2527bfa | 1723 | efe->logicalBlocksRecorded = cpu_to_le64(lb_recorded); |
1da177e4 | 1724 | |
ab9a3a73 SM |
1725 | if (iinfo->i_streamdir) { |
1726 | struct long_ad *icb_lad = &efe->streamDirectoryICB; | |
1727 | ||
1728 | icb_lad->extLocation = | |
1729 | cpu_to_lelb(iinfo->i_locStreamdir); | |
1730 | icb_lad->extLength = | |
1731 | cpu_to_le32(inode->i_sb->s_blocksize); | |
1732 | } | |
1733 | ||
c3b9cecd AB |
1734 | udf_adjust_time(iinfo, inode->i_atime); |
1735 | udf_adjust_time(iinfo, inode->i_mtime); | |
1736 | udf_adjust_time(iinfo, inode->i_ctime); | |
1da177e4 | 1737 | |
c3b9cecd AB |
1738 | udf_time_to_disk_stamp(&efe->accessTime, inode->i_atime); |
1739 | udf_time_to_disk_stamp(&efe->modificationTime, inode->i_mtime); | |
56774805 | 1740 | udf_time_to_disk_stamp(&efe->createTime, iinfo->i_crtime); |
c3b9cecd | 1741 | udf_time_to_disk_stamp(&efe->attrTime, inode->i_ctime); |
1da177e4 | 1742 | |
033c9da0 | 1743 | memset(&(efe->impIdent), 0, sizeof(efe->impIdent)); |
1da177e4 LT |
1744 | strcpy(efe->impIdent.ident, UDF_ID_DEVELOPER); |
1745 | efe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; | |
1746 | efe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; | |
48d6d8ff MS |
1747 | efe->uniqueID = cpu_to_le64(iinfo->i_unique); |
1748 | efe->lengthExtendedAttr = cpu_to_le32(iinfo->i_lenEAttr); | |
1749 | efe->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc); | |
d5e2cf07 | 1750 | efe->checkpoint = cpu_to_le32(iinfo->i_checkpoint); |
1da177e4 LT |
1751 | efe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_EFE); |
1752 | crclen = sizeof(struct extendedFileEntry); | |
1753 | } | |
70f19f58 SM |
1754 | |
1755 | finish: | |
48d6d8ff | 1756 | if (iinfo->i_strat4096) { |
1da177e4 LT |
1757 | fe->icbTag.strategyType = cpu_to_le16(4096); |
1758 | fe->icbTag.strategyParameter = cpu_to_le16(1); | |
1759 | fe->icbTag.numEntries = cpu_to_le16(2); | |
cb00ea35 | 1760 | } else { |
1da177e4 LT |
1761 | fe->icbTag.strategyType = cpu_to_le16(4); |
1762 | fe->icbTag.numEntries = cpu_to_le16(1); | |
1763 | } | |
1764 | ||
70f19f58 SM |
1765 | if (iinfo->i_use) |
1766 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_USE; | |
1767 | else if (S_ISDIR(inode->i_mode)) | |
1da177e4 LT |
1768 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_DIRECTORY; |
1769 | else if (S_ISREG(inode->i_mode)) | |
1770 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_REGULAR; | |
1771 | else if (S_ISLNK(inode->i_mode)) | |
1772 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_SYMLINK; | |
1773 | else if (S_ISBLK(inode->i_mode)) | |
1774 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_BLOCK; | |
1775 | else if (S_ISCHR(inode->i_mode)) | |
1776 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_CHAR; | |
1777 | else if (S_ISFIFO(inode->i_mode)) | |
1778 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_FIFO; | |
1779 | else if (S_ISSOCK(inode->i_mode)) | |
1780 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_SOCKET; | |
1781 | ||
48d6d8ff | 1782 | icbflags = iinfo->i_alloc_type | |
28de7948 CG |
1783 | ((inode->i_mode & S_ISUID) ? ICBTAG_FLAG_SETUID : 0) | |
1784 | ((inode->i_mode & S_ISGID) ? ICBTAG_FLAG_SETGID : 0) | | |
1785 | ((inode->i_mode & S_ISVTX) ? ICBTAG_FLAG_STICKY : 0) | | |
1786 | (le16_to_cpu(fe->icbTag.flags) & | |
1787 | ~(ICBTAG_FLAG_AD_MASK | ICBTAG_FLAG_SETUID | | |
1788 | ICBTAG_FLAG_SETGID | ICBTAG_FLAG_STICKY)); | |
1da177e4 LT |
1789 | |
1790 | fe->icbTag.flags = cpu_to_le16(icbflags); | |
6c79e987 | 1791 | if (sbi->s_udfrev >= 0x0200) |
1da177e4 LT |
1792 | fe->descTag.descVersion = cpu_to_le16(3); |
1793 | else | |
1794 | fe->descTag.descVersion = cpu_to_le16(2); | |
6c79e987 | 1795 | fe->descTag.tagSerialNum = cpu_to_le16(sbi->s_serial_number); |
4b11111a | 1796 | fe->descTag.tagLocation = cpu_to_le32( |
48d6d8ff | 1797 | iinfo->i_location.logicalBlockNum); |
aae917cd | 1798 | crclen += iinfo->i_lenEAttr + iinfo->i_lenAlloc - sizeof(struct tag); |
1da177e4 | 1799 | fe->descTag.descCRCLength = cpu_to_le16(crclen); |
5ca4e4be | 1800 | fe->descTag.descCRC = cpu_to_le16(crc_itu_t(0, (char *)fe + sizeof(struct tag), |
f845fced | 1801 | crclen)); |
3f2587bb | 1802 | fe->descTag.tagChecksum = udf_tag_checksum(&fe->descTag); |
1da177e4 | 1803 | |
5833ded9 | 1804 | set_buffer_uptodate(bh); |
aae917cd JK |
1805 | unlock_buffer(bh); |
1806 | ||
1da177e4 LT |
1807 | /* write the data blocks */ |
1808 | mark_buffer_dirty(bh); | |
cb00ea35 | 1809 | if (do_sync) { |
1da177e4 | 1810 | sync_dirty_buffer(bh); |
aae917cd | 1811 | if (buffer_write_io_error(bh)) { |
78ace70c JP |
1812 | udf_warn(inode->i_sb, "IO error syncing udf inode [%08lx]\n", |
1813 | inode->i_ino); | |
1da177e4 LT |
1814 | err = -EIO; |
1815 | } | |
1816 | } | |
3bf25cb4 | 1817 | brelse(bh); |
28de7948 | 1818 | |
1da177e4 LT |
1819 | return err; |
1820 | } | |
1821 | ||
6174c2eb JK |
1822 | struct inode *__udf_iget(struct super_block *sb, struct kernel_lb_addr *ino, |
1823 | bool hidden_inode) | |
1da177e4 LT |
1824 | { |
1825 | unsigned long block = udf_get_lb_pblock(sb, ino, 0); | |
1826 | struct inode *inode = iget_locked(sb, block); | |
6d3d5e86 | 1827 | int err; |
1da177e4 LT |
1828 | |
1829 | if (!inode) | |
6d3d5e86 | 1830 | return ERR_PTR(-ENOMEM); |
1da177e4 | 1831 | |
85a37983 JK |
1832 | if (!(inode->i_state & I_NEW)) { |
1833 | if (UDF_I(inode)->i_hidden != hidden_inode) { | |
1834 | iput(inode); | |
1835 | return ERR_PTR(-EFSCORRUPTED); | |
1836 | } | |
6d3d5e86 | 1837 | return inode; |
85a37983 | 1838 | } |
1da177e4 | 1839 | |
6d3d5e86 | 1840 | memcpy(&UDF_I(inode)->i_location, ino, sizeof(struct kernel_lb_addr)); |
6174c2eb | 1841 | err = udf_read_inode(inode, hidden_inode); |
6d3d5e86 JK |
1842 | if (err < 0) { |
1843 | iget_failed(inode); | |
1844 | return ERR_PTR(err); | |
1da177e4 | 1845 | } |
6d3d5e86 | 1846 | unlock_new_inode(inode); |
1da177e4 LT |
1847 | |
1848 | return inode; | |
1da177e4 LT |
1849 | } |
1850 | ||
b490bdd6 | 1851 | int udf_setup_indirect_aext(struct inode *inode, udf_pblk_t block, |
fcea62ba | 1852 | struct extent_position *epos) |
1da177e4 | 1853 | { |
fcea62ba JK |
1854 | struct super_block *sb = inode->i_sb; |
1855 | struct buffer_head *bh; | |
1da177e4 | 1856 | struct allocExtDesc *aed; |
fcea62ba JK |
1857 | struct extent_position nepos; |
1858 | struct kernel_lb_addr neloc; | |
1859 | int ver, adsize; | |
1da177e4 | 1860 | |
fcea62ba JK |
1861 | if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
1862 | adsize = sizeof(struct short_ad); | |
1863 | else if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_LONG) | |
1864 | adsize = sizeof(struct long_ad); | |
1da177e4 | 1865 | else |
4f1b1519 | 1866 | return -EIO; |
fcea62ba JK |
1867 | |
1868 | neloc.logicalBlockNum = block; | |
1869 | neloc.partitionReferenceNum = epos->block.partitionReferenceNum; | |
1870 | ||
101ee137 | 1871 | bh = sb_getblk(sb, udf_get_lb_pblock(sb, &neloc, 0)); |
fcea62ba JK |
1872 | if (!bh) |
1873 | return -EIO; | |
1874 | lock_buffer(bh); | |
1875 | memset(bh->b_data, 0x00, sb->s_blocksize); | |
1876 | set_buffer_uptodate(bh); | |
1877 | unlock_buffer(bh); | |
1878 | mark_buffer_dirty_inode(bh, inode); | |
1879 | ||
1880 | aed = (struct allocExtDesc *)(bh->b_data); | |
1881 | if (!UDF_QUERY_FLAG(sb, UDF_FLAG_STRICT)) { | |
1882 | aed->previousAllocExtLocation = | |
1883 | cpu_to_le32(epos->block.logicalBlockNum); | |
1884 | } | |
1885 | aed->lengthAllocDescs = cpu_to_le32(0); | |
1886 | if (UDF_SB(sb)->s_udfrev >= 0x0200) | |
1887 | ver = 3; | |
1da177e4 | 1888 | else |
fcea62ba JK |
1889 | ver = 2; |
1890 | udf_new_tag(bh->b_data, TAG_IDENT_AED, ver, 1, block, | |
1891 | sizeof(struct tag)); | |
1892 | ||
1893 | nepos.block = neloc; | |
1894 | nepos.offset = sizeof(struct allocExtDesc); | |
1895 | nepos.bh = bh; | |
1896 | ||
1897 | /* | |
1898 | * Do we have to copy current last extent to make space for indirect | |
1899 | * one? | |
1900 | */ | |
1901 | if (epos->offset + adsize > sb->s_blocksize) { | |
1902 | struct kernel_lb_addr cp_loc; | |
1903 | uint32_t cp_len; | |
1904 | int cp_type; | |
1905 | ||
1906 | epos->offset -= adsize; | |
1907 | cp_type = udf_current_aext(inode, epos, &cp_loc, &cp_len, 0); | |
1908 | cp_len |= ((uint32_t)cp_type) << 30; | |
1909 | ||
1910 | __udf_add_aext(inode, &nepos, &cp_loc, cp_len, 1); | |
1911 | udf_write_aext(inode, epos, &nepos.block, | |
800552ce | 1912 | sb->s_blocksize | EXT_NEXT_EXTENT_ALLOCDESCS, 0); |
fcea62ba JK |
1913 | } else { |
1914 | __udf_add_aext(inode, epos, &nepos.block, | |
800552ce | 1915 | sb->s_blocksize | EXT_NEXT_EXTENT_ALLOCDESCS, 0); |
fcea62ba JK |
1916 | } |
1917 | ||
1918 | brelse(epos->bh); | |
1919 | *epos = nepos; | |
1920 | ||
1921 | return 0; | |
1922 | } | |
1923 | ||
1924 | /* | |
1925 | * Append extent at the given position - should be the first free one in inode | |
1926 | * / indirect extent. This function assumes there is enough space in the inode | |
1927 | * or indirect extent. Use udf_add_aext() if you didn't check for this before. | |
1928 | */ | |
1929 | int __udf_add_aext(struct inode *inode, struct extent_position *epos, | |
1930 | struct kernel_lb_addr *eloc, uint32_t elen, int inc) | |
1931 | { | |
1932 | struct udf_inode_info *iinfo = UDF_I(inode); | |
1933 | struct allocExtDesc *aed; | |
1934 | int adsize; | |
1da177e4 | 1935 | |
48d6d8ff | 1936 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
5ca4e4be | 1937 | adsize = sizeof(struct short_ad); |
48d6d8ff | 1938 | else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
5ca4e4be | 1939 | adsize = sizeof(struct long_ad); |
1da177e4 | 1940 | else |
7e49b6f2 | 1941 | return -EIO; |
1da177e4 | 1942 | |
fcea62ba JK |
1943 | if (!epos->bh) { |
1944 | WARN_ON(iinfo->i_lenAlloc != | |
1945 | epos->offset - udf_file_entry_alloc_offset(inode)); | |
1946 | } else { | |
1947 | aed = (struct allocExtDesc *)epos->bh->b_data; | |
1948 | WARN_ON(le32_to_cpu(aed->lengthAllocDescs) != | |
1949 | epos->offset - sizeof(struct allocExtDesc)); | |
1950 | WARN_ON(epos->offset + adsize > inode->i_sb->s_blocksize); | |
1da177e4 LT |
1951 | } |
1952 | ||
7e49b6f2 | 1953 | udf_write_aext(inode, epos, eloc, elen, inc); |
1da177e4 | 1954 | |
cb00ea35 | 1955 | if (!epos->bh) { |
48d6d8ff | 1956 | iinfo->i_lenAlloc += adsize; |
1da177e4 | 1957 | mark_inode_dirty(inode); |
cb00ea35 | 1958 | } else { |
ff116fc8 | 1959 | aed = (struct allocExtDesc *)epos->bh->b_data; |
c2104fda | 1960 | le32_add_cpu(&aed->lengthAllocDescs, adsize); |
4b11111a MS |
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, | |
1964 | epos->offset + (inc ? 0 : adsize)); | |
1da177e4 | 1965 | else |
4b11111a MS |
1966 | udf_update_tag(epos->bh->b_data, |
1967 | sizeof(struct allocExtDesc)); | |
ff116fc8 | 1968 | mark_buffer_dirty_inode(epos->bh, inode); |
1da177e4 LT |
1969 | } |
1970 | ||
7e49b6f2 | 1971 | return 0; |
1da177e4 LT |
1972 | } |
1973 | ||
fcea62ba JK |
1974 | /* |
1975 | * Append extent at given position - should be the first free one in inode | |
1976 | * / indirect extent. Takes care of allocating and linking indirect blocks. | |
1977 | */ | |
1978 | int udf_add_aext(struct inode *inode, struct extent_position *epos, | |
1979 | struct kernel_lb_addr *eloc, uint32_t elen, int inc) | |
1980 | { | |
1981 | int adsize; | |
1982 | struct super_block *sb = inode->i_sb; | |
1983 | ||
1984 | if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_SHORT) | |
1985 | adsize = sizeof(struct short_ad); | |
1986 | else if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_LONG) | |
1987 | adsize = sizeof(struct long_ad); | |
1988 | else | |
1989 | return -EIO; | |
1990 | ||
1991 | if (epos->offset + (2 * adsize) > sb->s_blocksize) { | |
1992 | int err; | |
b490bdd6 | 1993 | udf_pblk_t new_block; |
fcea62ba JK |
1994 | |
1995 | new_block = udf_new_block(sb, NULL, | |
1996 | epos->block.partitionReferenceNum, | |
1997 | epos->block.logicalBlockNum, &err); | |
1998 | if (!new_block) | |
1999 | return -ENOSPC; | |
2000 | ||
2001 | err = udf_setup_indirect_aext(inode, new_block, epos); | |
2002 | if (err) | |
2003 | return err; | |
2004 | } | |
2005 | ||
2006 | return __udf_add_aext(inode, epos, eloc, elen, inc); | |
2007 | } | |
2008 | ||
7e49b6f2 JK |
2009 | void udf_write_aext(struct inode *inode, struct extent_position *epos, |
2010 | struct kernel_lb_addr *eloc, uint32_t elen, int inc) | |
1da177e4 LT |
2011 | { |
2012 | int adsize; | |
2013 | uint8_t *ptr; | |
5ca4e4be PE |
2014 | struct short_ad *sad; |
2015 | struct long_ad *lad; | |
48d6d8ff | 2016 | struct udf_inode_info *iinfo = UDF_I(inode); |
1da177e4 | 2017 | |
ff116fc8 | 2018 | if (!epos->bh) |
382a2287 | 2019 | ptr = iinfo->i_data + epos->offset - |
4b11111a | 2020 | udf_file_entry_alloc_offset(inode) + |
48d6d8ff | 2021 | iinfo->i_lenEAttr; |
1da177e4 | 2022 | else |
ff116fc8 | 2023 | ptr = epos->bh->b_data + epos->offset; |
1da177e4 | 2024 | |
48d6d8ff | 2025 | switch (iinfo->i_alloc_type) { |
cb00ea35 | 2026 | case ICBTAG_FLAG_AD_SHORT: |
5ca4e4be | 2027 | sad = (struct short_ad *)ptr; |
28de7948 | 2028 | sad->extLength = cpu_to_le32(elen); |
97e961fd | 2029 | sad->extPosition = cpu_to_le32(eloc->logicalBlockNum); |
5ca4e4be | 2030 | adsize = sizeof(struct short_ad); |
28de7948 | 2031 | break; |
cb00ea35 | 2032 | case ICBTAG_FLAG_AD_LONG: |
5ca4e4be | 2033 | lad = (struct long_ad *)ptr; |
28de7948 | 2034 | lad->extLength = cpu_to_le32(elen); |
97e961fd | 2035 | lad->extLocation = cpu_to_lelb(*eloc); |
28de7948 | 2036 | memset(lad->impUse, 0x00, sizeof(lad->impUse)); |
5ca4e4be | 2037 | adsize = sizeof(struct long_ad); |
28de7948 | 2038 | break; |
cb00ea35 | 2039 | default: |
7e49b6f2 | 2040 | return; |
1da177e4 LT |
2041 | } |
2042 | ||
cb00ea35 | 2043 | if (epos->bh) { |
28de7948 | 2044 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
6c79e987 | 2045 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) { |
4b11111a MS |
2046 | struct allocExtDesc *aed = |
2047 | (struct allocExtDesc *)epos->bh->b_data; | |
ff116fc8 | 2048 | udf_update_tag(epos->bh->b_data, |
4b11111a MS |
2049 | le32_to_cpu(aed->lengthAllocDescs) + |
2050 | sizeof(struct allocExtDesc)); | |
1da177e4 | 2051 | } |
ff116fc8 | 2052 | mark_buffer_dirty_inode(epos->bh, inode); |
28de7948 | 2053 | } else { |
1da177e4 | 2054 | mark_inode_dirty(inode); |
28de7948 | 2055 | } |
1da177e4 LT |
2056 | |
2057 | if (inc) | |
ff116fc8 | 2058 | epos->offset += adsize; |
1da177e4 LT |
2059 | } |
2060 | ||
b0918d9f VN |
2061 | /* |
2062 | * Only 1 indirect extent in a row really makes sense but allow upto 16 in case | |
2063 | * someone does some weird stuff. | |
2064 | */ | |
2065 | #define UDF_MAX_INDIR_EXTS 16 | |
2066 | ||
4b11111a | 2067 | int8_t udf_next_aext(struct inode *inode, struct extent_position *epos, |
5ca4e4be | 2068 | struct kernel_lb_addr *eloc, uint32_t *elen, int inc) |
1da177e4 LT |
2069 | { |
2070 | int8_t etype; | |
b0918d9f | 2071 | unsigned int indirections = 0; |
1da177e4 | 2072 | |
ff116fc8 | 2073 | while ((etype = udf_current_aext(inode, epos, eloc, elen, inc)) == |
800552ce | 2074 | (EXT_NEXT_EXTENT_ALLOCDESCS >> 30)) { |
b490bdd6 | 2075 | udf_pblk_t block; |
b0918d9f VN |
2076 | |
2077 | if (++indirections > UDF_MAX_INDIR_EXTS) { | |
2078 | udf_err(inode->i_sb, | |
2079 | "too many indirect extents in inode %lu\n", | |
2080 | inode->i_ino); | |
2081 | return -1; | |
2082 | } | |
2083 | ||
ff116fc8 JK |
2084 | epos->block = *eloc; |
2085 | epos->offset = sizeof(struct allocExtDesc); | |
3bf25cb4 | 2086 | brelse(epos->bh); |
97e961fd | 2087 | block = udf_get_lb_pblock(inode->i_sb, &epos->block, 0); |
101ee137 | 2088 | epos->bh = sb_bread(inode->i_sb, block); |
4b11111a | 2089 | if (!epos->bh) { |
fcbf7637 | 2090 | udf_debug("reading block %u failed!\n", block); |
1da177e4 LT |
2091 | return -1; |
2092 | } | |
2093 | } | |
2094 | ||
2095 | return etype; | |
2096 | } | |
2097 | ||
4b11111a | 2098 | int8_t udf_current_aext(struct inode *inode, struct extent_position *epos, |
5ca4e4be | 2099 | struct kernel_lb_addr *eloc, uint32_t *elen, int inc) |
1da177e4 LT |
2100 | { |
2101 | int alen; | |
2102 | int8_t etype; | |
2103 | uint8_t *ptr; | |
5ca4e4be PE |
2104 | struct short_ad *sad; |
2105 | struct long_ad *lad; | |
48d6d8ff | 2106 | struct udf_inode_info *iinfo = UDF_I(inode); |
28de7948 | 2107 | |
cb00ea35 | 2108 | if (!epos->bh) { |
ff116fc8 JK |
2109 | if (!epos->offset) |
2110 | epos->offset = udf_file_entry_alloc_offset(inode); | |
382a2287 | 2111 | ptr = iinfo->i_data + epos->offset - |
4b11111a | 2112 | udf_file_entry_alloc_offset(inode) + |
48d6d8ff | 2113 | iinfo->i_lenEAttr; |
4b11111a | 2114 | alen = udf_file_entry_alloc_offset(inode) + |
48d6d8ff | 2115 | iinfo->i_lenAlloc; |
cb00ea35 | 2116 | } else { |
ff116fc8 JK |
2117 | if (!epos->offset) |
2118 | epos->offset = sizeof(struct allocExtDesc); | |
2119 | ptr = epos->bh->b_data + epos->offset; | |
28de7948 | 2120 | alen = sizeof(struct allocExtDesc) + |
4b11111a MS |
2121 | le32_to_cpu(((struct allocExtDesc *)epos->bh->b_data)-> |
2122 | lengthAllocDescs); | |
1da177e4 LT |
2123 | } |
2124 | ||
48d6d8ff | 2125 | switch (iinfo->i_alloc_type) { |
cb00ea35 | 2126 | case ICBTAG_FLAG_AD_SHORT: |
4b11111a MS |
2127 | sad = udf_get_fileshortad(ptr, alen, &epos->offset, inc); |
2128 | if (!sad) | |
28de7948 CG |
2129 | return -1; |
2130 | etype = le32_to_cpu(sad->extLength) >> 30; | |
2131 | eloc->logicalBlockNum = le32_to_cpu(sad->extPosition); | |
4b11111a | 2132 | eloc->partitionReferenceNum = |
48d6d8ff | 2133 | iinfo->i_location.partitionReferenceNum; |
28de7948 CG |
2134 | *elen = le32_to_cpu(sad->extLength) & UDF_EXTENT_LENGTH_MASK; |
2135 | break; | |
cb00ea35 | 2136 | case ICBTAG_FLAG_AD_LONG: |
4b11111a MS |
2137 | lad = udf_get_filelongad(ptr, alen, &epos->offset, inc); |
2138 | if (!lad) | |
1da177e4 | 2139 | return -1; |
28de7948 CG |
2140 | etype = le32_to_cpu(lad->extLength) >> 30; |
2141 | *eloc = lelb_to_cpu(lad->extLocation); | |
2142 | *elen = le32_to_cpu(lad->extLength) & UDF_EXTENT_LENGTH_MASK; | |
2143 | break; | |
2144 | default: | |
fcbf7637 | 2145 | udf_debug("alloc_type = %u unsupported\n", iinfo->i_alloc_type); |
28de7948 | 2146 | return -1; |
1da177e4 LT |
2147 | } |
2148 | ||
2149 | return etype; | |
2150 | } | |
2151 | ||
19fd80de JK |
2152 | static int udf_insert_aext(struct inode *inode, struct extent_position epos, |
2153 | struct kernel_lb_addr neloc, uint32_t nelen) | |
1da177e4 | 2154 | { |
5ca4e4be | 2155 | struct kernel_lb_addr oeloc; |
1da177e4 LT |
2156 | uint32_t oelen; |
2157 | int8_t etype; | |
19fd80de | 2158 | int err; |
1da177e4 | 2159 | |
ff116fc8 | 2160 | if (epos.bh) |
3bf25cb4 | 2161 | get_bh(epos.bh); |
1da177e4 | 2162 | |
cb00ea35 | 2163 | while ((etype = udf_next_aext(inode, &epos, &oeloc, &oelen, 0)) != -1) { |
97e961fd | 2164 | udf_write_aext(inode, &epos, &neloc, nelen, 1); |
1da177e4 LT |
2165 | neloc = oeloc; |
2166 | nelen = (etype << 30) | oelen; | |
2167 | } | |
19fd80de | 2168 | err = udf_add_aext(inode, &epos, &neloc, nelen, 1); |
3bf25cb4 | 2169 | brelse(epos.bh); |
28de7948 | 2170 | |
19fd80de | 2171 | return err; |
1da177e4 LT |
2172 | } |
2173 | ||
6c1e4d06 | 2174 | int8_t udf_delete_aext(struct inode *inode, struct extent_position epos) |
1da177e4 | 2175 | { |
ff116fc8 JK |
2176 | struct extent_position oepos; |
2177 | int adsize; | |
1da177e4 LT |
2178 | int8_t etype; |
2179 | struct allocExtDesc *aed; | |
48d6d8ff | 2180 | struct udf_inode_info *iinfo; |
6c1e4d06 JK |
2181 | struct kernel_lb_addr eloc; |
2182 | uint32_t elen; | |
1da177e4 | 2183 | |
cb00ea35 | 2184 | if (epos.bh) { |
3bf25cb4 JK |
2185 | get_bh(epos.bh); |
2186 | get_bh(epos.bh); | |
1da177e4 LT |
2187 | } |
2188 | ||
48d6d8ff MS |
2189 | iinfo = UDF_I(inode); |
2190 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) | |
5ca4e4be | 2191 | adsize = sizeof(struct short_ad); |
48d6d8ff | 2192 | else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
5ca4e4be | 2193 | adsize = sizeof(struct long_ad); |
1da177e4 LT |
2194 | else |
2195 | adsize = 0; | |
2196 | ||
ff116fc8 JK |
2197 | oepos = epos; |
2198 | if (udf_next_aext(inode, &epos, &eloc, &elen, 1) == -1) | |
1da177e4 LT |
2199 | return -1; |
2200 | ||
cb00ea35 | 2201 | while ((etype = udf_next_aext(inode, &epos, &eloc, &elen, 1)) != -1) { |
97e961fd | 2202 | udf_write_aext(inode, &oepos, &eloc, (etype << 30) | elen, 1); |
cb00ea35 | 2203 | if (oepos.bh != epos.bh) { |
ff116fc8 | 2204 | oepos.block = epos.block; |
3bf25cb4 JK |
2205 | brelse(oepos.bh); |
2206 | get_bh(epos.bh); | |
ff116fc8 JK |
2207 | oepos.bh = epos.bh; |
2208 | oepos.offset = epos.offset - adsize; | |
1da177e4 LT |
2209 | } |
2210 | } | |
5ca4e4be | 2211 | memset(&eloc, 0x00, sizeof(struct kernel_lb_addr)); |
1da177e4 LT |
2212 | elen = 0; |
2213 | ||
cb00ea35 | 2214 | if (epos.bh != oepos.bh) { |
97e961fd PE |
2215 | udf_free_blocks(inode->i_sb, inode, &epos.block, 0, 1); |
2216 | udf_write_aext(inode, &oepos, &eloc, elen, 1); | |
2217 | udf_write_aext(inode, &oepos, &eloc, elen, 1); | |
cb00ea35 | 2218 | if (!oepos.bh) { |
48d6d8ff | 2219 | iinfo->i_lenAlloc -= (adsize * 2); |
1da177e4 | 2220 | mark_inode_dirty(inode); |
cb00ea35 | 2221 | } else { |
ff116fc8 | 2222 | aed = (struct allocExtDesc *)oepos.bh->b_data; |
c2104fda | 2223 | le32_add_cpu(&aed->lengthAllocDescs, -(2 * adsize)); |
28de7948 | 2224 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
6c79e987 | 2225 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) |
4b11111a MS |
2226 | udf_update_tag(oepos.bh->b_data, |
2227 | oepos.offset - (2 * adsize)); | |
1da177e4 | 2228 | else |
4b11111a MS |
2229 | udf_update_tag(oepos.bh->b_data, |
2230 | sizeof(struct allocExtDesc)); | |
ff116fc8 | 2231 | mark_buffer_dirty_inode(oepos.bh, inode); |
1da177e4 | 2232 | } |
cb00ea35 | 2233 | } else { |
97e961fd | 2234 | udf_write_aext(inode, &oepos, &eloc, elen, 1); |
cb00ea35 | 2235 | if (!oepos.bh) { |
48d6d8ff | 2236 | iinfo->i_lenAlloc -= adsize; |
1da177e4 | 2237 | mark_inode_dirty(inode); |
cb00ea35 | 2238 | } else { |
ff116fc8 | 2239 | aed = (struct allocExtDesc *)oepos.bh->b_data; |
c2104fda | 2240 | le32_add_cpu(&aed->lengthAllocDescs, -adsize); |
28de7948 | 2241 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
6c79e987 | 2242 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) |
4b11111a MS |
2243 | udf_update_tag(oepos.bh->b_data, |
2244 | epos.offset - adsize); | |
1da177e4 | 2245 | else |
4b11111a MS |
2246 | udf_update_tag(oepos.bh->b_data, |
2247 | sizeof(struct allocExtDesc)); | |
ff116fc8 | 2248 | mark_buffer_dirty_inode(oepos.bh, inode); |
1da177e4 LT |
2249 | } |
2250 | } | |
647bd61a | 2251 | |
3bf25cb4 JK |
2252 | brelse(epos.bh); |
2253 | brelse(oepos.bh); | |
28de7948 | 2254 | |
1da177e4 LT |
2255 | return (elen >> 30); |
2256 | } | |
2257 | ||
4b11111a | 2258 | int8_t inode_bmap(struct inode *inode, sector_t block, |
5ca4e4be | 2259 | struct extent_position *pos, struct kernel_lb_addr *eloc, |
4b11111a | 2260 | uint32_t *elen, sector_t *offset) |
1da177e4 | 2261 | { |
4b11111a | 2262 | unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; |
bbc9abd2 | 2263 | loff_t lbcount = 0, bcount = (loff_t) block << blocksize_bits; |
1da177e4 | 2264 | int8_t etype; |
48d6d8ff | 2265 | struct udf_inode_info *iinfo; |
1da177e4 | 2266 | |
48d6d8ff | 2267 | iinfo = UDF_I(inode); |
99600051 NJ |
2268 | if (!udf_read_extent_cache(inode, bcount, &lbcount, pos)) { |
2269 | pos->offset = 0; | |
2270 | pos->block = iinfo->i_location; | |
2271 | pos->bh = NULL; | |
2272 | } | |
1da177e4 | 2273 | *elen = 0; |
cb00ea35 | 2274 | do { |
4b11111a MS |
2275 | etype = udf_next_aext(inode, pos, eloc, elen, 1); |
2276 | if (etype == -1) { | |
2277 | *offset = (bcount - lbcount) >> blocksize_bits; | |
48d6d8ff | 2278 | iinfo->i_lenExtents = lbcount; |
1da177e4 LT |
2279 | return -1; |
2280 | } | |
2281 | lbcount += *elen; | |
2282 | } while (lbcount <= bcount); | |
99600051 | 2283 | /* update extent cache */ |
b31c9ed9 | 2284 | udf_update_extent_cache(inode, lbcount - *elen, pos); |
4b11111a | 2285 | *offset = (bcount + *elen - lbcount) >> blocksize_bits; |
1da177e4 LT |
2286 | |
2287 | return etype; | |
2288 | } |