Commit | Line | Data |
---|---|---|
5ce34554 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
1da177e4 LT |
2 | /* |
3 | * inode.c | |
4 | * | |
5 | * PURPOSE | |
6 | * Inode handling routines for the OSTA-UDF(tm) filesystem. | |
7 | * | |
1da177e4 | 8 | * COPYRIGHT |
1da177e4 LT |
9 | * (C) 1998 Dave Boynton |
10 | * (C) 1998-2004 Ben Fennema | |
11 | * (C) 1999-2000 Stelias Computing Inc | |
12 | * | |
13 | * HISTORY | |
14 | * | |
15 | * 10/04/98 dgb Added rudimentary directory functions | |
16 | * 10/07/98 Fully working udf_block_map! It works! | |
17 | * 11/25/98 bmap altered to better support extents | |
4b11111a MS |
18 | * 12/06/98 blf partition support in udf_iget, udf_block_map |
19 | * and udf_read_inode | |
1da177e4 LT |
20 | * 12/12/98 rewrote udf_block_map to handle next extents and descs across |
21 | * block boundaries (which is not actually allowed) | |
22 | * 12/20/98 added support for strategy 4096 | |
23 | * 03/07/99 rewrote udf_block_map (again) | |
24 | * New funcs, inode_bmap, udf_next_aext | |
25 | * 04/19/99 Support for writing device EA's for major/minor # | |
26 | */ | |
27 | ||
28 | #include "udfdecl.h" | |
29 | #include <linux/mm.h> | |
1da177e4 LT |
30 | #include <linux/module.h> |
31 | #include <linux/pagemap.h> | |
1da177e4 LT |
32 | #include <linux/writeback.h> |
33 | #include <linux/slab.h> | |
f845fced | 34 | #include <linux/crc-itu-t.h> |
bc112323 | 35 | #include <linux/mpage.h> |
e2e40f2c | 36 | #include <linux/uio.h> |
2f8b5444 | 37 | #include <linux/bio.h> |
1da177e4 LT |
38 | |
39 | #include "udf_i.h" | |
40 | #include "udf_sb.h" | |
41 | ||
1da177e4 LT |
42 | #define EXTENT_MERGE_SIZE 5 |
43 | ||
c3367a1b SM |
44 | #define FE_MAPPED_PERMS (FE_PERM_U_READ | FE_PERM_U_WRITE | FE_PERM_U_EXEC | \ |
45 | FE_PERM_G_READ | FE_PERM_G_WRITE | FE_PERM_G_EXEC | \ | |
46 | FE_PERM_O_READ | FE_PERM_O_WRITE | FE_PERM_O_EXEC) | |
47 | ||
48 | #define FE_DELETE_PERMS (FE_PERM_U_DELETE | FE_PERM_G_DELETE | \ | |
49 | FE_PERM_O_DELETE) | |
50 | ||
f3a30be7 JK |
51 | struct udf_map_rq; |
52 | ||
faa17292 | 53 | static umode_t udf_convert_permissions(struct fileEntry *); |
1da177e4 | 54 | static int udf_update_inode(struct inode *, int); |
49521de1 | 55 | static int udf_sync_inode(struct inode *inode); |
647bd61a | 56 | static int udf_alloc_i_data(struct inode *inode, size_t size); |
b3c03fce | 57 | static int inode_getblk(struct inode *inode, struct udf_map_rq *map); |
19fd80de JK |
58 | static int udf_insert_aext(struct inode *, struct extent_position, |
59 | struct kernel_lb_addr, uint32_t); | |
b490bdd6 | 60 | static void udf_split_extents(struct inode *, int *, int, udf_pblk_t, |
3cc6f844 | 61 | struct kernel_long_ad *, int *); |
1da177e4 | 62 | static void udf_prealloc_extents(struct inode *, int, int, |
3cc6f844 FF |
63 | struct kernel_long_ad *, int *); |
64 | static void udf_merge_extents(struct inode *, struct kernel_long_ad *, int *); | |
19fd80de JK |
65 | static int udf_update_extents(struct inode *, struct kernel_long_ad *, int, |
66 | int, struct extent_position *); | |
36580ed0 JK |
67 | static int udf_get_block_wb(struct inode *inode, sector_t block, |
68 | struct buffer_head *bh_result, int create); | |
1da177e4 | 69 | |
99600051 NJ |
70 | static void __udf_clear_extent_cache(struct inode *inode) |
71 | { | |
72 | struct udf_inode_info *iinfo = UDF_I(inode); | |
73 | ||
74 | if (iinfo->cached_extent.lstart != -1) { | |
75 | brelse(iinfo->cached_extent.epos.bh); | |
76 | iinfo->cached_extent.lstart = -1; | |
77 | } | |
78 | } | |
79 | ||
80 | /* Invalidate extent cache */ | |
81 | static void udf_clear_extent_cache(struct inode *inode) | |
82 | { | |
83 | struct udf_inode_info *iinfo = UDF_I(inode); | |
84 | ||
85 | spin_lock(&iinfo->i_extent_cache_lock); | |
86 | __udf_clear_extent_cache(inode); | |
87 | spin_unlock(&iinfo->i_extent_cache_lock); | |
88 | } | |
89 | ||
90 | /* Return contents of extent cache */ | |
91 | static int udf_read_extent_cache(struct inode *inode, loff_t bcount, | |
92 | loff_t *lbcount, struct extent_position *pos) | |
93 | { | |
94 | struct udf_inode_info *iinfo = UDF_I(inode); | |
95 | int ret = 0; | |
96 | ||
97 | spin_lock(&iinfo->i_extent_cache_lock); | |
98 | if ((iinfo->cached_extent.lstart <= bcount) && | |
99 | (iinfo->cached_extent.lstart != -1)) { | |
100 | /* Cache hit */ | |
101 | *lbcount = iinfo->cached_extent.lstart; | |
102 | memcpy(pos, &iinfo->cached_extent.epos, | |
103 | sizeof(struct extent_position)); | |
104 | if (pos->bh) | |
105 | get_bh(pos->bh); | |
106 | ret = 1; | |
107 | } | |
108 | spin_unlock(&iinfo->i_extent_cache_lock); | |
109 | return ret; | |
110 | } | |
111 | ||
112 | /* Add extent to extent cache */ | |
113 | static void udf_update_extent_cache(struct inode *inode, loff_t estart, | |
b31c9ed9 | 114 | struct extent_position *pos) |
99600051 NJ |
115 | { |
116 | struct udf_inode_info *iinfo = UDF_I(inode); | |
117 | ||
118 | spin_lock(&iinfo->i_extent_cache_lock); | |
119 | /* Invalidate previously cached extent */ | |
120 | __udf_clear_extent_cache(inode); | |
121 | if (pos->bh) | |
122 | get_bh(pos->bh); | |
033c9da0 | 123 | memcpy(&iinfo->cached_extent.epos, pos, sizeof(*pos)); |
99600051 | 124 | iinfo->cached_extent.lstart = estart; |
b31c9ed9 FF |
125 | switch (iinfo->i_alloc_type) { |
126 | case ICBTAG_FLAG_AD_SHORT: | |
127 | iinfo->cached_extent.epos.offset -= sizeof(struct short_ad); | |
128 | break; | |
129 | case ICBTAG_FLAG_AD_LONG: | |
130 | iinfo->cached_extent.epos.offset -= sizeof(struct long_ad); | |
131 | break; | |
132 | } | |
99600051 NJ |
133 | spin_unlock(&iinfo->i_extent_cache_lock); |
134 | } | |
b1e32126 | 135 | |
3aac2b62 | 136 | void udf_evict_inode(struct inode *inode) |
1da177e4 | 137 | { |
2c948b3f | 138 | struct udf_inode_info *iinfo = UDF_I(inode); |
3aac2b62 AV |
139 | int want_delete = 0; |
140 | ||
044e2e26 JK |
141 | if (!is_bad_inode(inode)) { |
142 | if (!inode->i_nlink) { | |
143 | want_delete = 1; | |
144 | udf_setsize(inode, 0); | |
145 | udf_update_inode(inode, IS_SYNC(inode)); | |
146 | } | |
147 | if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB && | |
148 | inode->i_size != iinfo->i_lenExtents) { | |
149 | udf_warn(inode->i_sb, | |
150 | "Inode %lu (mode %o) has inode size %llu different from extent length %llu. Filesystem need not be standards compliant.\n", | |
151 | inode->i_ino, inode->i_mode, | |
152 | (unsigned long long)inode->i_size, | |
153 | (unsigned long long)iinfo->i_lenExtents); | |
154 | } | |
91b0abe3 JW |
155 | } |
156 | truncate_inode_pages_final(&inode->i_data); | |
3aac2b62 | 157 | invalidate_inode_buffers(inode); |
dbd5768f | 158 | clear_inode(inode); |
382a2287 JK |
159 | kfree(iinfo->i_data); |
160 | iinfo->i_data = NULL; | |
99600051 | 161 | udf_clear_extent_cache(inode); |
3aac2b62 | 162 | if (want_delete) { |
3aac2b62 | 163 | udf_free_inode(inode); |
3aac2b62 | 164 | } |
1da177e4 LT |
165 | } |
166 | ||
5eec54fc IA |
167 | static void udf_write_failed(struct address_space *mapping, loff_t to) |
168 | { | |
169 | struct inode *inode = mapping->host; | |
170 | struct udf_inode_info *iinfo = UDF_I(inode); | |
171 | loff_t isize = inode->i_size; | |
172 | ||
173 | if (to > isize) { | |
7caef267 | 174 | truncate_pagecache(inode, isize); |
5eec54fc IA |
175 | if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { |
176 | down_write(&iinfo->i_data_sem); | |
99600051 | 177 | udf_clear_extent_cache(inode); |
5eec54fc IA |
178 | udf_truncate_extents(inode); |
179 | up_write(&iinfo->i_data_sem); | |
180 | } | |
181 | } | |
182 | } | |
183 | ||
3822a7c4 | 184 | static int udf_adinicb_writepage(struct folio *folio, |
79d3c6db | 185 | struct writeback_control *wbc, void *data) |
378b8e1a | 186 | { |
96acbef6 | 187 | struct inode *inode = folio->mapping->host; |
79d3c6db JK |
188 | struct udf_inode_info *iinfo = UDF_I(inode); |
189 | ||
96acbef6 MWO |
190 | BUG_ON(!folio_test_locked(folio)); |
191 | BUG_ON(folio->index != 0); | |
192 | memcpy_from_file_folio(iinfo->i_data + iinfo->i_lenEAttr, folio, 0, | |
5cfc4532 | 193 | i_size_read(inode)); |
96acbef6 | 194 | folio_unlock(folio); |
79d3c6db JK |
195 | mark_inode_dirty(inode); |
196 | ||
197 | return 0; | |
198 | } | |
199 | ||
759e4d74 JK |
200 | static int udf_writepages(struct address_space *mapping, |
201 | struct writeback_control *wbc) | |
79d3c6db JK |
202 | { |
203 | struct inode *inode = mapping->host; | |
204 | struct udf_inode_info *iinfo = UDF_I(inode); | |
205 | ||
206 | if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) | |
207 | return mpage_writepages(mapping, wbc, udf_get_block_wb); | |
208 | return write_cache_pages(mapping, wbc, udf_adinicb_writepage, NULL); | |
378b8e1a NJ |
209 | } |
210 | ||
174cb748 JK |
211 | static void udf_adinicb_readpage(struct page *page) |
212 | { | |
213 | struct inode *inode = page->mapping->host; | |
214 | char *kaddr; | |
215 | struct udf_inode_info *iinfo = UDF_I(inode); | |
216 | loff_t isize = i_size_read(inode); | |
217 | ||
7b7f6865 | 218 | kaddr = kmap_local_page(page); |
174cb748 JK |
219 | memcpy(kaddr, iinfo->i_data + iinfo->i_lenEAttr, isize); |
220 | memset(kaddr + isize, 0, PAGE_SIZE - isize); | |
221 | flush_dcache_page(page); | |
222 | SetPageUptodate(page); | |
7b7f6865 | 223 | kunmap_local(kaddr); |
174cb748 JK |
224 | } |
225 | ||
759e4d74 | 226 | static int udf_read_folio(struct file *file, struct folio *folio) |
1da177e4 | 227 | { |
b7c31e6f JK |
228 | struct udf_inode_info *iinfo = UDF_I(file_inode(file)); |
229 | ||
230 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { | |
231 | udf_adinicb_readpage(&folio->page); | |
232 | folio_unlock(folio); | |
233 | return 0; | |
234 | } | |
f132ab7d | 235 | return mpage_read_folio(folio, udf_get_block); |
bc112323 NJ |
236 | } |
237 | ||
d4388340 | 238 | static void udf_readahead(struct readahead_control *rac) |
bc112323 | 239 | { |
cecb1f06 JK |
240 | struct udf_inode_info *iinfo = UDF_I(rac->mapping->host); |
241 | ||
242 | /* | |
243 | * No readahead needed for in-ICB files and udf_get_block() would get | |
244 | * confused for such file anyway. | |
245 | */ | |
246 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) | |
247 | return; | |
248 | ||
d4388340 | 249 | mpage_readahead(rac, udf_get_block); |
1da177e4 LT |
250 | } |
251 | ||
759e4d74 JK |
252 | static int udf_write_begin(struct file *file, struct address_space *mapping, |
253 | loff_t pos, unsigned len, | |
254 | struct page **pagep, void **fsdata) | |
1da177e4 | 255 | { |
60b99a1b JK |
256 | struct udf_inode_info *iinfo = UDF_I(file_inode(file)); |
257 | struct page *page; | |
155130a4 CH |
258 | int ret; |
259 | ||
60b99a1b JK |
260 | if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { |
261 | ret = block_write_begin(mapping, pos, len, pagep, | |
262 | udf_get_block); | |
263 | if (unlikely(ret)) | |
264 | udf_write_failed(mapping, pos + len); | |
265 | return ret; | |
266 | } | |
267 | if (WARN_ON_ONCE(pos >= PAGE_SIZE)) | |
268 | return -EIO; | |
269 | page = grab_cache_page_write_begin(mapping, 0); | |
270 | if (!page) | |
271 | return -ENOMEM; | |
272 | *pagep = page; | |
273 | if (!PageUptodate(page)) | |
274 | udf_adinicb_readpage(page); | |
275 | return 0; | |
5eec54fc | 276 | } |
155130a4 | 277 | |
759e4d74 JK |
278 | static int udf_write_end(struct file *file, struct address_space *mapping, |
279 | loff_t pos, unsigned len, unsigned copied, | |
280 | struct page *page, void *fsdata) | |
c694e40b JK |
281 | { |
282 | struct inode *inode = file_inode(file); | |
283 | loff_t last_pos; | |
284 | ||
285 | if (UDF_I(inode)->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) | |
286 | return generic_write_end(file, mapping, pos, len, copied, page, | |
287 | fsdata); | |
288 | last_pos = pos + copied; | |
289 | if (last_pos > inode->i_size) | |
290 | i_size_write(inode, last_pos); | |
291 | set_page_dirty(page); | |
292 | unlock_page(page); | |
293 | put_page(page); | |
294 | ||
295 | return copied; | |
296 | } | |
297 | ||
759e4d74 | 298 | static ssize_t udf_direct_IO(struct kiocb *iocb, struct iov_iter *iter) |
5eec54fc IA |
299 | { |
300 | struct file *file = iocb->ki_filp; | |
301 | struct address_space *mapping = file->f_mapping; | |
302 | struct inode *inode = mapping->host; | |
a6cbcd4a | 303 | size_t count = iov_iter_count(iter); |
5eec54fc IA |
304 | ssize_t ret; |
305 | ||
d5abfb1b JK |
306 | /* Fallback to buffered IO for in-ICB files */ |
307 | if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) | |
308 | return 0; | |
c8b8e32d | 309 | ret = blockdev_direct_IO(iocb, inode, iter, udf_get_block); |
6f673763 | 310 | if (unlikely(ret < 0 && iov_iter_rw(iter) == WRITE)) |
c8b8e32d | 311 | udf_write_failed(mapping, iocb->ki_pos + count); |
155130a4 | 312 | return ret; |
1da177e4 LT |
313 | } |
314 | ||
315 | static sector_t udf_bmap(struct address_space *mapping, sector_t block) | |
316 | { | |
907c6c2f JK |
317 | struct udf_inode_info *iinfo = UDF_I(mapping->host); |
318 | ||
319 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) | |
320 | return -EINVAL; | |
cb00ea35 | 321 | return generic_block_bmap(mapping, block, udf_get_block); |
1da177e4 LT |
322 | } |
323 | ||
f5e54d6e | 324 | const struct address_space_operations udf_aops = { |
e621900a | 325 | .dirty_folio = block_dirty_folio, |
7ba13abb | 326 | .invalidate_folio = block_invalidate_folio, |
f132ab7d | 327 | .read_folio = udf_read_folio, |
d4388340 | 328 | .readahead = udf_readahead, |
378b8e1a | 329 | .writepages = udf_writepages, |
5eec54fc | 330 | .write_begin = udf_write_begin, |
c694e40b | 331 | .write_end = udf_write_end, |
5eec54fc | 332 | .direct_IO = udf_direct_IO, |
28de7948 | 333 | .bmap = udf_bmap, |
36273e5b | 334 | .migrate_folio = buffer_migrate_folio, |
1da177e4 LT |
335 | }; |
336 | ||
d2eb8c35 JK |
337 | /* |
338 | * Expand file stored in ICB to a normal one-block-file | |
339 | * | |
d2eb8c35 JK |
340 | * This function requires i_mutex held |
341 | */ | |
7e49b6f2 | 342 | int udf_expand_file_adinicb(struct inode *inode) |
1da177e4 LT |
343 | { |
344 | struct page *page; | |
48d6d8ff | 345 | struct udf_inode_info *iinfo = UDF_I(inode); |
7e49b6f2 | 346 | int err; |
1da177e4 | 347 | |
5955102c | 348 | WARN_ON_ONCE(!inode_is_locked(inode)); |
48d6d8ff | 349 | if (!iinfo->i_lenAlloc) { |
6a3b37e0 | 350 | down_write(&iinfo->i_data_sem); |
1da177e4 | 351 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) |
48d6d8ff | 352 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT; |
1da177e4 | 353 | else |
48d6d8ff | 354 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG; |
d2eb8c35 | 355 | up_write(&iinfo->i_data_sem); |
1da177e4 | 356 | mark_inode_dirty(inode); |
7e49b6f2 | 357 | return 0; |
1da177e4 LT |
358 | } |
359 | ||
7e49b6f2 JK |
360 | page = find_or_create_page(inode->i_mapping, 0, GFP_NOFS); |
361 | if (!page) | |
362 | return -ENOMEM; | |
cd7619d6 | 363 | |
1eeceaec JK |
364 | if (!PageUptodate(page)) |
365 | udf_adinicb_readpage(page); | |
d2eb8c35 | 366 | down_write(&iinfo->i_data_sem); |
382a2287 | 367 | memset(iinfo->i_data + iinfo->i_lenEAttr, 0x00, |
48d6d8ff MS |
368 | iinfo->i_lenAlloc); |
369 | iinfo->i_lenAlloc = 0; | |
1da177e4 | 370 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) |
48d6d8ff | 371 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT; |
1da177e4 | 372 | else |
48d6d8ff | 373 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG; |
7fc3b7c2 JK |
374 | set_page_dirty(page); |
375 | unlock_page(page); | |
d2eb8c35 | 376 | up_write(&iinfo->i_data_sem); |
7fc3b7c2 | 377 | err = filemap_fdatawrite(inode->i_mapping); |
7e49b6f2 JK |
378 | if (err) { |
379 | /* Restore everything back so that we don't lose data... */ | |
380 | lock_page(page); | |
d2eb8c35 | 381 | down_write(&iinfo->i_data_sem); |
1eeceaec JK |
382 | memcpy_to_page(page, 0, iinfo->i_data + iinfo->i_lenEAttr, |
383 | inode->i_size); | |
7e49b6f2 JK |
384 | unlock_page(page); |
385 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB; | |
ea856919 | 386 | iinfo->i_lenAlloc = inode->i_size; |
d2eb8c35 | 387 | up_write(&iinfo->i_data_sem); |
7e49b6f2 | 388 | } |
09cbfeaf | 389 | put_page(page); |
1da177e4 | 390 | mark_inode_dirty(inode); |
7e49b6f2 JK |
391 | |
392 | return err; | |
1da177e4 LT |
393 | } |
394 | ||
80942521 JK |
395 | #define UDF_MAP_CREATE 0x01 /* Mapping can allocate new blocks */ |
396 | #define UDF_MAP_NOPREALLOC 0x02 /* Do not preallocate blocks */ | |
f3a30be7 JK |
397 | |
398 | #define UDF_BLK_MAPPED 0x01 /* Block was successfully mapped */ | |
399 | #define UDF_BLK_NEW 0x02 /* Block was freshly allocated */ | |
400 | ||
401 | struct udf_map_rq { | |
402 | sector_t lblk; | |
403 | udf_pblk_t pblk; | |
404 | int iflags; /* UDF_MAP_ flags determining behavior */ | |
405 | int oflags; /* UDF_BLK_ flags reporting results */ | |
406 | }; | |
407 | ||
408 | static int udf_map_block(struct inode *inode, struct udf_map_rq *map) | |
1da177e4 | 409 | { |
b3c03fce | 410 | int err; |
f3a30be7 | 411 | struct udf_inode_info *iinfo = UDF_I(inode); |
1da177e4 | 412 | |
63bceed8 JK |
413 | if (WARN_ON_ONCE(iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)) |
414 | return -EFSCORRUPTED; | |
415 | ||
f3a30be7 JK |
416 | map->oflags = 0; |
417 | if (!(map->iflags & UDF_MAP_CREATE)) { | |
364a6665 JK |
418 | struct kernel_lb_addr eloc; |
419 | uint32_t elen; | |
420 | sector_t offset; | |
421 | struct extent_position epos = {}; | |
422 | ||
423 | down_read(&iinfo->i_data_sem); | |
424 | if (inode_bmap(inode, map->lblk, &epos, &eloc, &elen, &offset) | |
425 | == (EXT_RECORDED_ALLOCATED >> 30)) { | |
426 | map->pblk = udf_get_lb_pblock(inode->i_sb, &eloc, | |
427 | offset); | |
f3a30be7 | 428 | map->oflags |= UDF_BLK_MAPPED; |
364a6665 JK |
429 | } |
430 | up_read(&iinfo->i_data_sem); | |
431 | brelse(epos.bh); | |
432 | ||
1da177e4 LT |
433 | return 0; |
434 | } | |
435 | ||
4d0fb621 | 436 | down_write(&iinfo->i_data_sem); |
16d05565 JK |
437 | /* |
438 | * Block beyond EOF and prealloc extents? Just discard preallocation | |
439 | * as it is not useful and complicates things. | |
440 | */ | |
f54aa97f | 441 | if (((loff_t)map->lblk) << inode->i_blkbits >= iinfo->i_lenExtents) |
16d05565 | 442 | udf_discard_prealloc(inode); |
99600051 | 443 | udf_clear_extent_cache(inode); |
b3c03fce | 444 | err = inode_getblk(inode, map); |
f3a30be7 | 445 | up_write(&iinfo->i_data_sem); |
b3c03fce | 446 | return err; |
f3a30be7 | 447 | } |
28de7948 | 448 | |
36580ed0 JK |
449 | static int __udf_get_block(struct inode *inode, sector_t block, |
450 | struct buffer_head *bh_result, int flags) | |
f3a30be7 JK |
451 | { |
452 | int err; | |
453 | struct udf_map_rq map = { | |
454 | .lblk = block, | |
36580ed0 | 455 | .iflags = flags, |
f3a30be7 JK |
456 | }; |
457 | ||
458 | err = udf_map_block(inode, &map); | |
459 | if (err < 0) | |
460 | return err; | |
461 | if (map.oflags & UDF_BLK_MAPPED) { | |
462 | map_bh(bh_result, inode->i_sb, map.pblk); | |
463 | if (map.oflags & UDF_BLK_NEW) | |
464 | set_buffer_new(bh_result); | |
465 | } | |
466 | return 0; | |
1da177e4 LT |
467 | } |
468 | ||
36580ed0 JK |
469 | int udf_get_block(struct inode *inode, sector_t block, |
470 | struct buffer_head *bh_result, int create) | |
471 | { | |
472 | int flags = create ? UDF_MAP_CREATE : 0; | |
473 | ||
474 | /* | |
475 | * We preallocate blocks only for regular files. It also makes sense | |
476 | * for directories but there's a problem when to drop the | |
477 | * preallocation. We might use some delayed work for that but I feel | |
478 | * it's overengineering for a filesystem like UDF. | |
479 | */ | |
480 | if (!S_ISREG(inode->i_mode)) | |
481 | flags |= UDF_MAP_NOPREALLOC; | |
482 | return __udf_get_block(inode, block, bh_result, flags); | |
483 | } | |
484 | ||
485 | /* | |
486 | * We shouldn't be allocating blocks on page writeback since we allocate them | |
487 | * on page fault. We can spot dirty buffers without allocated blocks though | |
488 | * when truncate expands file. These however don't have valid data so we can | |
489 | * safely ignore them. So never allocate blocks from page writeback. | |
490 | */ | |
491 | static int udf_get_block_wb(struct inode *inode, sector_t block, | |
492 | struct buffer_head *bh_result, int create) | |
493 | { | |
494 | return __udf_get_block(inode, block, bh_result, 0); | |
495 | } | |
496 | ||
fa33cdbf SM |
497 | /* Extend the file with new blocks totaling 'new_block_bytes', |
498 | * return the number of extents added | |
499 | */ | |
7e49b6f2 JK |
500 | static int udf_do_extend_file(struct inode *inode, |
501 | struct extent_position *last_pos, | |
502 | struct kernel_long_ad *last_ext, | |
fa33cdbf | 503 | loff_t new_block_bytes) |
31170b6a | 504 | { |
fa33cdbf | 505 | uint32_t add; |
31170b6a JK |
506 | int count = 0, fake = !(last_ext->extLength & UDF_EXTENT_LENGTH_MASK); |
507 | struct super_block *sb = inode->i_sb; | |
48d6d8ff | 508 | struct udf_inode_info *iinfo; |
7e49b6f2 | 509 | int err; |
31170b6a JK |
510 | |
511 | /* The previous extent is fake and we should not extend by anything | |
512 | * - there's nothing to do... */ | |
fa33cdbf | 513 | if (!new_block_bytes && fake) |
31170b6a | 514 | return 0; |
28de7948 | 515 | |
48d6d8ff | 516 | iinfo = UDF_I(inode); |
31170b6a JK |
517 | /* Round the last extent up to a multiple of block size */ |
518 | if (last_ext->extLength & (sb->s_blocksize - 1)) { | |
519 | last_ext->extLength = | |
28de7948 CG |
520 | (last_ext->extLength & UDF_EXTENT_FLAG_MASK) | |
521 | (((last_ext->extLength & UDF_EXTENT_LENGTH_MASK) + | |
522 | sb->s_blocksize - 1) & ~(sb->s_blocksize - 1)); | |
48d6d8ff MS |
523 | iinfo->i_lenExtents = |
524 | (iinfo->i_lenExtents + sb->s_blocksize - 1) & | |
28de7948 | 525 | ~(sb->s_blocksize - 1); |
31170b6a | 526 | } |
28de7948 | 527 | |
e57191a8 | 528 | add = 0; |
31170b6a | 529 | /* Can we merge with the previous extent? */ |
4b11111a MS |
530 | if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) == |
531 | EXT_NOT_RECORDED_NOT_ALLOCATED) { | |
fa33cdbf SM |
532 | add = (1 << 30) - sb->s_blocksize - |
533 | (last_ext->extLength & UDF_EXTENT_LENGTH_MASK); | |
534 | if (add > new_block_bytes) | |
535 | add = new_block_bytes; | |
536 | new_block_bytes -= add; | |
537 | last_ext->extLength += add; | |
31170b6a JK |
538 | } |
539 | ||
540 | if (fake) { | |
70bfb3a8 JK |
541 | err = udf_add_aext(inode, last_pos, &last_ext->extLocation, |
542 | last_ext->extLength, 1); | |
543 | if (err < 0) | |
544 | goto out_err; | |
31170b6a | 545 | count++; |
6c371578 JK |
546 | } else { |
547 | struct kernel_lb_addr tmploc; | |
548 | uint32_t tmplen; | |
549 | ||
97e961fd | 550 | udf_write_aext(inode, last_pos, &last_ext->extLocation, |
4b11111a | 551 | last_ext->extLength, 1); |
63c9e47a | 552 | |
6c371578 | 553 | /* |
63c9e47a SM |
554 | * We've rewritten the last extent. If we are going to add |
555 | * more extents, we may need to enter possible following | |
556 | * empty indirect extent. | |
6c371578 | 557 | */ |
16d05565 | 558 | if (new_block_bytes) |
63c9e47a | 559 | udf_next_aext(inode, last_pos, &tmploc, &tmplen, 0); |
6c371578 | 560 | } |
e57191a8 | 561 | iinfo->i_lenExtents += add; |
28de7948 | 562 | |
31170b6a | 563 | /* Managed to do everything necessary? */ |
fa33cdbf | 564 | if (!new_block_bytes) |
31170b6a JK |
565 | goto out; |
566 | ||
567 | /* All further extents will be NOT_RECORDED_NOT_ALLOCATED */ | |
568 | last_ext->extLocation.logicalBlockNum = 0; | |
4b11111a | 569 | last_ext->extLocation.partitionReferenceNum = 0; |
fa33cdbf SM |
570 | add = (1 << 30) - sb->s_blocksize; |
571 | last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | add; | |
28de7948 | 572 | |
31170b6a | 573 | /* Create enough extents to cover the whole hole */ |
fa33cdbf SM |
574 | while (new_block_bytes > add) { |
575 | new_block_bytes -= add; | |
7e49b6f2 JK |
576 | err = udf_add_aext(inode, last_pos, &last_ext->extLocation, |
577 | last_ext->extLength, 1); | |
578 | if (err) | |
70bfb3a8 | 579 | goto out_err; |
e57191a8 | 580 | iinfo->i_lenExtents += add; |
31170b6a JK |
581 | count++; |
582 | } | |
fa33cdbf | 583 | if (new_block_bytes) { |
31170b6a | 584 | last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | |
fa33cdbf | 585 | new_block_bytes; |
7e49b6f2 JK |
586 | err = udf_add_aext(inode, last_pos, &last_ext->extLocation, |
587 | last_ext->extLength, 1); | |
588 | if (err) | |
70bfb3a8 | 589 | goto out_err; |
e57191a8 | 590 | iinfo->i_lenExtents += new_block_bytes; |
31170b6a JK |
591 | count++; |
592 | } | |
28de7948 CG |
593 | |
594 | out: | |
31170b6a | 595 | /* last_pos should point to the last written extent... */ |
48d6d8ff | 596 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
5ca4e4be | 597 | last_pos->offset -= sizeof(struct short_ad); |
48d6d8ff | 598 | else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
5ca4e4be | 599 | last_pos->offset -= sizeof(struct long_ad); |
31170b6a | 600 | else |
7e49b6f2 | 601 | return -EIO; |
28de7948 | 602 | |
31170b6a | 603 | return count; |
70bfb3a8 JK |
604 | out_err: |
605 | /* Remove extents we've created so far */ | |
606 | udf_clear_extent_cache(inode); | |
607 | udf_truncate_extents(inode); | |
608 | return err; | |
31170b6a JK |
609 | } |
610 | ||
fa33cdbf SM |
611 | /* Extend the final block of the file to final_block_len bytes */ |
612 | static void udf_do_extend_final_block(struct inode *inode, | |
613 | struct extent_position *last_pos, | |
614 | struct kernel_long_ad *last_ext, | |
1f3868f0 | 615 | uint32_t new_elen) |
fa33cdbf | 616 | { |
fa33cdbf SM |
617 | uint32_t added_bytes; |
618 | ||
1f3868f0 JK |
619 | /* |
620 | * Extent already large enough? It may be already rounded up to block | |
621 | * size... | |
622 | */ | |
623 | if (new_elen <= (last_ext->extLength & UDF_EXTENT_LENGTH_MASK)) | |
624 | return; | |
83c7423d | 625 | added_bytes = new_elen - (last_ext->extLength & UDF_EXTENT_LENGTH_MASK); |
fa33cdbf SM |
626 | last_ext->extLength += added_bytes; |
627 | UDF_I(inode)->i_lenExtents += added_bytes; | |
628 | ||
629 | udf_write_aext(inode, last_pos, &last_ext->extLocation, | |
630 | last_ext->extLength, 1); | |
631 | } | |
632 | ||
7e49b6f2 JK |
633 | static int udf_extend_file(struct inode *inode, loff_t newsize) |
634 | { | |
635 | ||
636 | struct extent_position epos; | |
637 | struct kernel_lb_addr eloc; | |
638 | uint32_t elen; | |
639 | int8_t etype; | |
640 | struct super_block *sb = inode->i_sb; | |
641 | sector_t first_block = newsize >> sb->s_blocksize_bits, offset; | |
1f3868f0 | 642 | loff_t new_elen; |
7e49b6f2 JK |
643 | int adsize; |
644 | struct udf_inode_info *iinfo = UDF_I(inode); | |
645 | struct kernel_long_ad extent; | |
fa33cdbf | 646 | int err = 0; |
1f3868f0 | 647 | bool within_last_ext; |
7e49b6f2 JK |
648 | |
649 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) | |
650 | adsize = sizeof(struct short_ad); | |
651 | else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) | |
652 | adsize = sizeof(struct long_ad); | |
653 | else | |
654 | BUG(); | |
655 | ||
2d532616 | 656 | down_write(&iinfo->i_data_sem); |
16d05565 JK |
657 | /* |
658 | * When creating hole in file, just don't bother with preserving | |
659 | * preallocation. It likely won't be very useful anyway. | |
660 | */ | |
661 | udf_discard_prealloc(inode); | |
662 | ||
7e49b6f2 | 663 | etype = inode_bmap(inode, first_block, &epos, &eloc, &elen, &offset); |
1f3868f0 | 664 | within_last_ext = (etype != -1); |
16d05565 | 665 | /* We don't expect extents past EOF... */ |
1f3868f0 | 666 | WARN_ON_ONCE(within_last_ext && |
16d05565 | 667 | elen > ((loff_t)offset + 1) << inode->i_blkbits); |
7e49b6f2 | 668 | |
7e49b6f2 JK |
669 | if ((!epos.bh && epos.offset == udf_file_entry_alloc_offset(inode)) || |
670 | (epos.bh && epos.offset == sizeof(struct allocExtDesc))) { | |
671 | /* File has no extents at all or has empty last | |
672 | * indirect extent! Create a fake extent... */ | |
673 | extent.extLocation.logicalBlockNum = 0; | |
674 | extent.extLocation.partitionReferenceNum = 0; | |
675 | extent.extLength = EXT_NOT_RECORDED_NOT_ALLOCATED; | |
676 | } else { | |
677 | epos.offset -= adsize; | |
678 | etype = udf_next_aext(inode, &epos, &extent.extLocation, | |
679 | &extent.extLength, 0); | |
680 | extent.extLength |= etype << 30; | |
681 | } | |
fa33cdbf | 682 | |
1f3868f0 JK |
683 | new_elen = ((loff_t)offset << inode->i_blkbits) | |
684 | (newsize & (sb->s_blocksize - 1)); | |
fa33cdbf SM |
685 | |
686 | /* File has extent covering the new size (could happen when extending | |
687 | * inside a block)? | |
688 | */ | |
1f3868f0 | 689 | if (within_last_ext) { |
fa33cdbf | 690 | /* Extending file within the last file block */ |
1f3868f0 | 691 | udf_do_extend_final_block(inode, &epos, &extent, new_elen); |
fa33cdbf | 692 | } else { |
1f3868f0 | 693 | err = udf_do_extend_file(inode, &epos, &extent, new_elen); |
fa33cdbf SM |
694 | } |
695 | ||
7e49b6f2 JK |
696 | if (err < 0) |
697 | goto out; | |
698 | err = 0; | |
7e49b6f2 JK |
699 | out: |
700 | brelse(epos.bh); | |
2d532616 | 701 | up_write(&iinfo->i_data_sem); |
7e49b6f2 JK |
702 | return err; |
703 | } | |
704 | ||
b3c03fce | 705 | static int inode_getblk(struct inode *inode, struct udf_map_rq *map) |
1da177e4 | 706 | { |
5ca4e4be | 707 | struct kernel_long_ad laarr[EXTENT_MERGE_SIZE]; |
ff116fc8 | 708 | struct extent_position prev_epos, cur_epos, next_epos; |
1da177e4 | 709 | int count = 0, startnum = 0, endnum = 0; |
85d71244 | 710 | uint32_t elen = 0, tmpelen; |
5ca4e4be | 711 | struct kernel_lb_addr eloc, tmpeloc; |
1da177e4 | 712 | int c = 1; |
60448b1d | 713 | loff_t lbcount = 0, b_off = 0; |
b3c03fce | 714 | udf_pblk_t newblocknum; |
60448b1d | 715 | sector_t offset = 0; |
1da177e4 | 716 | int8_t etype; |
48d6d8ff | 717 | struct udf_inode_info *iinfo = UDF_I(inode); |
b490bdd6 | 718 | udf_pblk_t goal = 0, pgoal = iinfo->i_location.logicalBlockNum; |
31170b6a | 719 | int lastblock = 0; |
fb719c59 | 720 | bool isBeyondEOF; |
b3c03fce | 721 | int ret = 0; |
1da177e4 | 722 | |
ff116fc8 | 723 | prev_epos.offset = udf_file_entry_alloc_offset(inode); |
48d6d8ff | 724 | prev_epos.block = iinfo->i_location; |
ff116fc8 JK |
725 | prev_epos.bh = NULL; |
726 | cur_epos = next_epos = prev_epos; | |
b3c03fce | 727 | b_off = (loff_t)map->lblk << inode->i_sb->s_blocksize_bits; |
1da177e4 LT |
728 | |
729 | /* find the extent which contains the block we are looking for. | |
cb00ea35 CG |
730 | alternate between laarr[0] and laarr[1] for locations of the |
731 | current extent, and the previous extent */ | |
732 | do { | |
733 | if (prev_epos.bh != cur_epos.bh) { | |
3bf25cb4 JK |
734 | brelse(prev_epos.bh); |
735 | get_bh(cur_epos.bh); | |
ff116fc8 | 736 | prev_epos.bh = cur_epos.bh; |
1da177e4 | 737 | } |
cb00ea35 | 738 | if (cur_epos.bh != next_epos.bh) { |
3bf25cb4 JK |
739 | brelse(cur_epos.bh); |
740 | get_bh(next_epos.bh); | |
ff116fc8 | 741 | cur_epos.bh = next_epos.bh; |
1da177e4 LT |
742 | } |
743 | ||
744 | lbcount += elen; | |
745 | ||
ff116fc8 JK |
746 | prev_epos.block = cur_epos.block; |
747 | cur_epos.block = next_epos.block; | |
1da177e4 | 748 | |
ff116fc8 JK |
749 | prev_epos.offset = cur_epos.offset; |
750 | cur_epos.offset = next_epos.offset; | |
1da177e4 | 751 | |
4b11111a MS |
752 | etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 1); |
753 | if (etype == -1) | |
1da177e4 LT |
754 | break; |
755 | ||
756 | c = !c; | |
757 | ||
758 | laarr[c].extLength = (etype << 30) | elen; | |
759 | laarr[c].extLocation = eloc; | |
760 | ||
761 | if (etype != (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) | |
762 | pgoal = eloc.logicalBlockNum + | |
28de7948 CG |
763 | ((elen + inode->i_sb->s_blocksize - 1) >> |
764 | inode->i_sb->s_blocksize_bits); | |
1da177e4 | 765 | |
cb00ea35 | 766 | count++; |
1da177e4 LT |
767 | } while (lbcount + elen <= b_off); |
768 | ||
769 | b_off -= lbcount; | |
770 | offset = b_off >> inode->i_sb->s_blocksize_bits; | |
85d71244 JK |
771 | /* |
772 | * Move prev_epos and cur_epos into indirect extent if we are at | |
773 | * the pointer to it | |
774 | */ | |
775 | udf_next_aext(inode, &prev_epos, &tmpeloc, &tmpelen, 0); | |
776 | udf_next_aext(inode, &cur_epos, &tmpeloc, &tmpelen, 0); | |
1da177e4 LT |
777 | |
778 | /* if the extent is allocated and recorded, return the block | |
cb00ea35 | 779 | if the extent is not a multiple of the blocksize, round up */ |
1da177e4 | 780 | |
cb00ea35 CG |
781 | if (etype == (EXT_RECORDED_ALLOCATED >> 30)) { |
782 | if (elen & (inode->i_sb->s_blocksize - 1)) { | |
1da177e4 | 783 | elen = EXT_RECORDED_ALLOCATED | |
28de7948 CG |
784 | ((elen + inode->i_sb->s_blocksize - 1) & |
785 | ~(inode->i_sb->s_blocksize - 1)); | |
b316c443 JK |
786 | iinfo->i_lenExtents = |
787 | ALIGN(iinfo->i_lenExtents, | |
788 | inode->i_sb->s_blocksize); | |
7e49b6f2 | 789 | udf_write_aext(inode, &cur_epos, &eloc, elen, 1); |
1da177e4 | 790 | } |
b3c03fce JK |
791 | map->oflags = UDF_BLK_MAPPED; |
792 | map->pblk = udf_get_lb_pblock(inode->i_sb, &eloc, offset); | |
02d4ca49 | 793 | goto out_free; |
1da177e4 LT |
794 | } |
795 | ||
16d05565 | 796 | /* Are we beyond EOF and preallocated extent? */ |
cb00ea35 | 797 | if (etype == -1) { |
fa33cdbf | 798 | loff_t hole_len; |
16d05565 | 799 | |
6981498d | 800 | isBeyondEOF = true; |
31170b6a JK |
801 | if (count) { |
802 | if (c) | |
803 | laarr[0] = laarr[1]; | |
804 | startnum = 1; | |
cb00ea35 | 805 | } else { |
31170b6a | 806 | /* Create a fake extent when there's not one */ |
4b11111a | 807 | memset(&laarr[0].extLocation, 0x00, |
5ca4e4be | 808 | sizeof(struct kernel_lb_addr)); |
31170b6a | 809 | laarr[0].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED; |
7e49b6f2 | 810 | /* Will udf_do_extend_file() create real extent from |
4b11111a | 811 | a fake one? */ |
31170b6a JK |
812 | startnum = (offset > 0); |
813 | } | |
814 | /* Create extents for the hole between EOF and offset */ | |
fa33cdbf SM |
815 | hole_len = (loff_t)offset << inode->i_blkbits; |
816 | ret = udf_do_extend_file(inode, &prev_epos, laarr, hole_len); | |
b3c03fce | 817 | if (ret < 0) |
02d4ca49 | 818 | goto out_free; |
31170b6a JK |
819 | c = 0; |
820 | offset = 0; | |
821 | count += ret; | |
36ec52ea JK |
822 | /* |
823 | * Is there any real extent? - otherwise we overwrite the fake | |
824 | * one... | |
825 | */ | |
826 | if (count) | |
827 | c = !c; | |
828 | laarr[c].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | | |
829 | inode->i_sb->s_blocksize; | |
830 | memset(&laarr[c].extLocation, 0x00, | |
831 | sizeof(struct kernel_lb_addr)); | |
832 | count++; | |
cb00ea35 | 833 | endnum = c + 1; |
1da177e4 | 834 | lastblock = 1; |
cb00ea35 | 835 | } else { |
6981498d | 836 | isBeyondEOF = false; |
1da177e4 LT |
837 | endnum = startnum = ((count > 2) ? 2 : count); |
838 | ||
4b11111a MS |
839 | /* if the current extent is in position 0, |
840 | swap it with the previous */ | |
cb00ea35 | 841 | if (!c && count != 1) { |
31170b6a JK |
842 | laarr[2] = laarr[0]; |
843 | laarr[0] = laarr[1]; | |
844 | laarr[1] = laarr[2]; | |
845 | c = 1; | |
846 | } | |
1da177e4 | 847 | |
4b11111a MS |
848 | /* if the current block is located in an extent, |
849 | read the next extent */ | |
850 | etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 0); | |
851 | if (etype != -1) { | |
cb00ea35 CG |
852 | laarr[c + 1].extLength = (etype << 30) | elen; |
853 | laarr[c + 1].extLocation = eloc; | |
854 | count++; | |
855 | startnum++; | |
856 | endnum++; | |
4b11111a | 857 | } else |
1da177e4 LT |
858 | lastblock = 1; |
859 | } | |
1da177e4 LT |
860 | |
861 | /* if the current extent is not recorded but allocated, get the | |
28de7948 | 862 | * block in the extent corresponding to the requested block */ |
4b11111a | 863 | if ((laarr[c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30)) |
1da177e4 | 864 | newblocknum = laarr[c].extLocation.logicalBlockNum + offset; |
4b11111a | 865 | else { /* otherwise, allocate a new block */ |
b3c03fce | 866 | if (iinfo->i_next_alloc_block == map->lblk) |
48d6d8ff | 867 | goal = iinfo->i_next_alloc_goal; |
1da177e4 | 868 | |
cb00ea35 | 869 | if (!goal) { |
4b11111a | 870 | if (!(goal = pgoal)) /* XXX: what was intended here? */ |
48d6d8ff | 871 | goal = iinfo->i_location.logicalBlockNum + 1; |
1da177e4 LT |
872 | } |
873 | ||
4b11111a | 874 | newblocknum = udf_new_block(inode->i_sb, inode, |
48d6d8ff | 875 | iinfo->i_location.partitionReferenceNum, |
b3c03fce JK |
876 | goal, &ret); |
877 | if (!newblocknum) | |
02d4ca49 | 878 | goto out_free; |
fb719c59 NJ |
879 | if (isBeyondEOF) |
880 | iinfo->i_lenExtents += inode->i_sb->s_blocksize; | |
1da177e4 LT |
881 | } |
882 | ||
4b11111a MS |
883 | /* if the extent the requsted block is located in contains multiple |
884 | * blocks, split the extent into at most three extents. blocks prior | |
885 | * to requested block, requested block, and blocks after requested | |
886 | * block */ | |
1da177e4 LT |
887 | udf_split_extents(inode, &c, offset, newblocknum, laarr, &endnum); |
888 | ||
80942521 | 889 | if (!(map->iflags & UDF_MAP_NOPREALLOC)) |
81056dd0 | 890 | udf_prealloc_extents(inode, c, lastblock, laarr, &endnum); |
1da177e4 LT |
891 | |
892 | /* merge any continuous blocks in laarr */ | |
893 | udf_merge_extents(inode, laarr, &endnum); | |
894 | ||
895 | /* write back the new extents, inserting new extents if the new number | |
28de7948 CG |
896 | * of extents is greater than the old number, and deleting extents if |
897 | * the new number of extents is less than the old number */ | |
b3c03fce JK |
898 | ret = udf_update_extents(inode, laarr, startnum, endnum, &prev_epos); |
899 | if (ret < 0) | |
19fd80de | 900 | goto out_free; |
1da177e4 | 901 | |
b3c03fce | 902 | map->pblk = udf_get_pblock(inode->i_sb, newblocknum, |
48d6d8ff | 903 | iinfo->i_location.partitionReferenceNum, 0); |
b3c03fce JK |
904 | if (!map->pblk) { |
905 | ret = -EFSCORRUPTED; | |
02d4ca49 | 906 | goto out_free; |
7b0b0933 | 907 | } |
b3c03fce JK |
908 | map->oflags = UDF_BLK_NEW | UDF_BLK_MAPPED; |
909 | iinfo->i_next_alloc_block = map->lblk + 1; | |
de80dae0 | 910 | iinfo->i_next_alloc_goal = newblocknum + 1; |
59ad88f2 | 911 | inode_set_ctime_current(inode); |
1da177e4 LT |
912 | |
913 | if (IS_SYNC(inode)) | |
914 | udf_sync_inode(inode); | |
915 | else | |
916 | mark_inode_dirty(inode); | |
b3c03fce | 917 | ret = 0; |
02d4ca49 FF |
918 | out_free: |
919 | brelse(prev_epos.bh); | |
920 | brelse(cur_epos.bh); | |
921 | brelse(next_epos.bh); | |
b3c03fce | 922 | return ret; |
1da177e4 LT |
923 | } |
924 | ||
cb00ea35 | 925 | static void udf_split_extents(struct inode *inode, int *c, int offset, |
b490bdd6 SM |
926 | udf_pblk_t newblocknum, |
927 | struct kernel_long_ad *laarr, int *endnum) | |
1da177e4 | 928 | { |
4b11111a MS |
929 | unsigned long blocksize = inode->i_sb->s_blocksize; |
930 | unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; | |
931 | ||
1da177e4 | 932 | if ((laarr[*c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30) || |
4b11111a MS |
933 | (laarr[*c].extLength >> 30) == |
934 | (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) { | |
1da177e4 LT |
935 | int curr = *c; |
936 | int blen = ((laarr[curr].extLength & UDF_EXTENT_LENGTH_MASK) + | |
4b11111a | 937 | blocksize - 1) >> blocksize_bits; |
1da177e4 LT |
938 | int8_t etype = (laarr[curr].extLength >> 30); |
939 | ||
4b11111a | 940 | if (blen == 1) |
28de7948 | 941 | ; |
4b11111a | 942 | else if (!offset || blen == offset + 1) { |
cb00ea35 CG |
943 | laarr[curr + 2] = laarr[curr + 1]; |
944 | laarr[curr + 1] = laarr[curr]; | |
945 | } else { | |
946 | laarr[curr + 3] = laarr[curr + 1]; | |
947 | laarr[curr + 2] = laarr[curr + 1] = laarr[curr]; | |
948 | } | |
949 | ||
950 | if (offset) { | |
951 | if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30)) { | |
4b11111a | 952 | udf_free_blocks(inode->i_sb, inode, |
97e961fd | 953 | &laarr[curr].extLocation, |
4b11111a MS |
954 | 0, offset); |
955 | laarr[curr].extLength = | |
956 | EXT_NOT_RECORDED_NOT_ALLOCATED | | |
957 | (offset << blocksize_bits); | |
1da177e4 | 958 | laarr[curr].extLocation.logicalBlockNum = 0; |
4b11111a MS |
959 | laarr[curr].extLocation. |
960 | partitionReferenceNum = 0; | |
961 | } else | |
1da177e4 | 962 | laarr[curr].extLength = (etype << 30) | |
4b11111a | 963 | (offset << blocksize_bits); |
cb00ea35 CG |
964 | curr++; |
965 | (*c)++; | |
966 | (*endnum)++; | |
1da177e4 | 967 | } |
647bd61a | 968 | |
1da177e4 LT |
969 | laarr[curr].extLocation.logicalBlockNum = newblocknum; |
970 | if (etype == (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) | |
971 | laarr[curr].extLocation.partitionReferenceNum = | |
c0b34438 | 972 | UDF_I(inode)->i_location.partitionReferenceNum; |
1da177e4 | 973 | laarr[curr].extLength = EXT_RECORDED_ALLOCATED | |
4b11111a | 974 | blocksize; |
cb00ea35 | 975 | curr++; |
1da177e4 | 976 | |
cb00ea35 | 977 | if (blen != offset + 1) { |
1da177e4 | 978 | if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30)) |
4b11111a MS |
979 | laarr[curr].extLocation.logicalBlockNum += |
980 | offset + 1; | |
28de7948 | 981 | laarr[curr].extLength = (etype << 30) | |
4b11111a | 982 | ((blen - (offset + 1)) << blocksize_bits); |
cb00ea35 CG |
983 | curr++; |
984 | (*endnum)++; | |
1da177e4 LT |
985 | } |
986 | } | |
987 | } | |
988 | ||
989 | static void udf_prealloc_extents(struct inode *inode, int c, int lastblock, | |
3cc6f844 | 990 | struct kernel_long_ad *laarr, |
cb00ea35 | 991 | int *endnum) |
1da177e4 LT |
992 | { |
993 | int start, length = 0, currlength = 0, i; | |
994 | ||
cb00ea35 | 995 | if (*endnum >= (c + 1)) { |
1da177e4 LT |
996 | if (!lastblock) |
997 | return; | |
998 | else | |
999 | start = c; | |
cb00ea35 | 1000 | } else { |
4b11111a MS |
1001 | if ((laarr[c + 1].extLength >> 30) == |
1002 | (EXT_NOT_RECORDED_ALLOCATED >> 30)) { | |
cb00ea35 | 1003 | start = c + 1; |
4b11111a MS |
1004 | length = currlength = |
1005 | (((laarr[c + 1].extLength & | |
1006 | UDF_EXTENT_LENGTH_MASK) + | |
1007 | inode->i_sb->s_blocksize - 1) >> | |
1008 | inode->i_sb->s_blocksize_bits); | |
1009 | } else | |
1da177e4 LT |
1010 | start = c; |
1011 | } | |
1012 | ||
cb00ea35 CG |
1013 | for (i = start + 1; i <= *endnum; i++) { |
1014 | if (i == *endnum) { | |
1da177e4 LT |
1015 | if (lastblock) |
1016 | length += UDF_DEFAULT_PREALLOC_BLOCKS; | |
4b11111a MS |
1017 | } else if ((laarr[i].extLength >> 30) == |
1018 | (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) { | |
1019 | length += (((laarr[i].extLength & | |
1020 | UDF_EXTENT_LENGTH_MASK) + | |
1021 | inode->i_sb->s_blocksize - 1) >> | |
1022 | inode->i_sb->s_blocksize_bits); | |
1023 | } else | |
1da177e4 LT |
1024 | break; |
1025 | } | |
1026 | ||
cb00ea35 | 1027 | if (length) { |
1da177e4 | 1028 | int next = laarr[start].extLocation.logicalBlockNum + |
28de7948 | 1029 | (((laarr[start].extLength & UDF_EXTENT_LENGTH_MASK) + |
4b11111a MS |
1030 | inode->i_sb->s_blocksize - 1) >> |
1031 | inode->i_sb->s_blocksize_bits); | |
1da177e4 | 1032 | int numalloc = udf_prealloc_blocks(inode->i_sb, inode, |
4b11111a MS |
1033 | laarr[start].extLocation.partitionReferenceNum, |
1034 | next, (UDF_DEFAULT_PREALLOC_BLOCKS > length ? | |
1035 | length : UDF_DEFAULT_PREALLOC_BLOCKS) - | |
1036 | currlength); | |
28de7948 | 1037 | if (numalloc) { |
4b11111a | 1038 | if (start == (c + 1)) |
1da177e4 | 1039 | laarr[start].extLength += |
4b11111a MS |
1040 | (numalloc << |
1041 | inode->i_sb->s_blocksize_bits); | |
1042 | else { | |
cb00ea35 | 1043 | memmove(&laarr[c + 2], &laarr[c + 1], |
5ca4e4be | 1044 | sizeof(struct long_ad) * (*endnum - (c + 1))); |
cb00ea35 CG |
1045 | (*endnum)++; |
1046 | laarr[c + 1].extLocation.logicalBlockNum = next; | |
1047 | laarr[c + 1].extLocation.partitionReferenceNum = | |
4b11111a MS |
1048 | laarr[c].extLocation. |
1049 | partitionReferenceNum; | |
1050 | laarr[c + 1].extLength = | |
1051 | EXT_NOT_RECORDED_ALLOCATED | | |
1052 | (numalloc << | |
1053 | inode->i_sb->s_blocksize_bits); | |
cb00ea35 | 1054 | start = c + 1; |
1da177e4 LT |
1055 | } |
1056 | ||
cb00ea35 | 1057 | for (i = start + 1; numalloc && i < *endnum; i++) { |
4b11111a MS |
1058 | int elen = ((laarr[i].extLength & |
1059 | UDF_EXTENT_LENGTH_MASK) + | |
1060 | inode->i_sb->s_blocksize - 1) >> | |
1061 | inode->i_sb->s_blocksize_bits; | |
1da177e4 | 1062 | |
cb00ea35 | 1063 | if (elen > numalloc) { |
1da177e4 | 1064 | laarr[i].extLength -= |
4b11111a MS |
1065 | (numalloc << |
1066 | inode->i_sb->s_blocksize_bits); | |
1da177e4 | 1067 | numalloc = 0; |
cb00ea35 | 1068 | } else { |
1da177e4 | 1069 | numalloc -= elen; |
cb00ea35 | 1070 | if (*endnum > (i + 1)) |
4b11111a MS |
1071 | memmove(&laarr[i], |
1072 | &laarr[i + 1], | |
5ca4e4be | 1073 | sizeof(struct long_ad) * |
4b11111a | 1074 | (*endnum - (i + 1))); |
cb00ea35 CG |
1075 | i--; |
1076 | (*endnum)--; | |
1da177e4 LT |
1077 | } |
1078 | } | |
c0b34438 | 1079 | UDF_I(inode)->i_lenExtents += |
4b11111a | 1080 | numalloc << inode->i_sb->s_blocksize_bits; |
1da177e4 LT |
1081 | } |
1082 | } | |
1083 | } | |
1084 | ||
3cc6f844 | 1085 | static void udf_merge_extents(struct inode *inode, struct kernel_long_ad *laarr, |
cb00ea35 | 1086 | int *endnum) |
1da177e4 LT |
1087 | { |
1088 | int i; | |
4b11111a MS |
1089 | unsigned long blocksize = inode->i_sb->s_blocksize; |
1090 | unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; | |
1da177e4 | 1091 | |
cb00ea35 | 1092 | for (i = 0; i < (*endnum - 1); i++) { |
5ca4e4be PE |
1093 | struct kernel_long_ad *li /*l[i]*/ = &laarr[i]; |
1094 | struct kernel_long_ad *lip1 /*l[i plus 1]*/ = &laarr[i + 1]; | |
4b11111a MS |
1095 | |
1096 | if (((li->extLength >> 30) == (lip1->extLength >> 30)) && | |
1097 | (((li->extLength >> 30) == | |
1098 | (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) || | |
1099 | ((lip1->extLocation.logicalBlockNum - | |
1100 | li->extLocation.logicalBlockNum) == | |
1101 | (((li->extLength & UDF_EXTENT_LENGTH_MASK) + | |
1102 | blocksize - 1) >> blocksize_bits)))) { | |
1103 | ||
1104 | if (((li->extLength & UDF_EXTENT_LENGTH_MASK) + | |
53cafe1d JK |
1105 | (lip1->extLength & UDF_EXTENT_LENGTH_MASK) + |
1106 | blocksize - 1) <= UDF_EXTENT_LENGTH_MASK) { | |
4b11111a MS |
1107 | li->extLength = lip1->extLength + |
1108 | (((li->extLength & | |
1109 | UDF_EXTENT_LENGTH_MASK) + | |
1110 | blocksize - 1) & ~(blocksize - 1)); | |
1111 | if (*endnum > (i + 2)) | |
1112 | memmove(&laarr[i + 1], &laarr[i + 2], | |
5ca4e4be | 1113 | sizeof(struct long_ad) * |
4b11111a MS |
1114 | (*endnum - (i + 2))); |
1115 | i--; | |
1116 | (*endnum)--; | |
1da177e4 | 1117 | } |
4b11111a MS |
1118 | } else if (((li->extLength >> 30) == |
1119 | (EXT_NOT_RECORDED_ALLOCATED >> 30)) && | |
1120 | ((lip1->extLength >> 30) == | |
1121 | (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))) { | |
97e961fd | 1122 | udf_free_blocks(inode->i_sb, inode, &li->extLocation, 0, |
4b11111a MS |
1123 | ((li->extLength & |
1124 | UDF_EXTENT_LENGTH_MASK) + | |
1125 | blocksize - 1) >> blocksize_bits); | |
1126 | li->extLocation.logicalBlockNum = 0; | |
1127 | li->extLocation.partitionReferenceNum = 0; | |
1128 | ||
1129 | if (((li->extLength & UDF_EXTENT_LENGTH_MASK) + | |
1130 | (lip1->extLength & UDF_EXTENT_LENGTH_MASK) + | |
1131 | blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) { | |
1132 | lip1->extLength = (lip1->extLength - | |
1133 | (li->extLength & | |
1134 | UDF_EXTENT_LENGTH_MASK) + | |
1135 | UDF_EXTENT_LENGTH_MASK) & | |
1136 | ~(blocksize - 1); | |
1137 | li->extLength = (li->extLength & | |
1138 | UDF_EXTENT_FLAG_MASK) + | |
1139 | (UDF_EXTENT_LENGTH_MASK + 1) - | |
1140 | blocksize; | |
cb00ea35 | 1141 | } else { |
4b11111a MS |
1142 | li->extLength = lip1->extLength + |
1143 | (((li->extLength & | |
1144 | UDF_EXTENT_LENGTH_MASK) + | |
1145 | blocksize - 1) & ~(blocksize - 1)); | |
cb00ea35 CG |
1146 | if (*endnum > (i + 2)) |
1147 | memmove(&laarr[i + 1], &laarr[i + 2], | |
5ca4e4be | 1148 | sizeof(struct long_ad) * |
4b11111a | 1149 | (*endnum - (i + 2))); |
cb00ea35 CG |
1150 | i--; |
1151 | (*endnum)--; | |
1da177e4 | 1152 | } |
4b11111a MS |
1153 | } else if ((li->extLength >> 30) == |
1154 | (EXT_NOT_RECORDED_ALLOCATED >> 30)) { | |
1155 | udf_free_blocks(inode->i_sb, inode, | |
97e961fd | 1156 | &li->extLocation, 0, |
4b11111a MS |
1157 | ((li->extLength & |
1158 | UDF_EXTENT_LENGTH_MASK) + | |
1159 | blocksize - 1) >> blocksize_bits); | |
1160 | li->extLocation.logicalBlockNum = 0; | |
1161 | li->extLocation.partitionReferenceNum = 0; | |
1162 | li->extLength = (li->extLength & | |
1163 | UDF_EXTENT_LENGTH_MASK) | | |
1164 | EXT_NOT_RECORDED_NOT_ALLOCATED; | |
1da177e4 LT |
1165 | } |
1166 | } | |
1167 | } | |
1168 | ||
19fd80de JK |
1169 | static int udf_update_extents(struct inode *inode, struct kernel_long_ad *laarr, |
1170 | int startnum, int endnum, | |
1171 | struct extent_position *epos) | |
1da177e4 LT |
1172 | { |
1173 | int start = 0, i; | |
5ca4e4be | 1174 | struct kernel_lb_addr tmploc; |
1da177e4 | 1175 | uint32_t tmplen; |
19fd80de | 1176 | int err; |
1da177e4 | 1177 | |
cb00ea35 CG |
1178 | if (startnum > endnum) { |
1179 | for (i = 0; i < (startnum - endnum); i++) | |
6c1e4d06 | 1180 | udf_delete_aext(inode, *epos); |
cb00ea35 CG |
1181 | } else if (startnum < endnum) { |
1182 | for (i = 0; i < (endnum - startnum); i++) { | |
19fd80de JK |
1183 | err = udf_insert_aext(inode, *epos, |
1184 | laarr[i].extLocation, | |
1185 | laarr[i].extLength); | |
1186 | /* | |
1187 | * If we fail here, we are likely corrupting the extent | |
1188 | * list and leaking blocks. At least stop early to | |
1189 | * limit the damage. | |
1190 | */ | |
1191 | if (err < 0) | |
1192 | return err; | |
ff116fc8 | 1193 | udf_next_aext(inode, epos, &laarr[i].extLocation, |
cb00ea35 CG |
1194 | &laarr[i].extLength, 1); |
1195 | start++; | |
1da177e4 LT |
1196 | } |
1197 | } | |
1198 | ||
cb00ea35 | 1199 | for (i = start; i < endnum; i++) { |
ff116fc8 | 1200 | udf_next_aext(inode, epos, &tmploc, &tmplen, 0); |
97e961fd | 1201 | udf_write_aext(inode, epos, &laarr[i].extLocation, |
cb00ea35 | 1202 | laarr[i].extLength, 1); |
1da177e4 | 1203 | } |
19fd80de | 1204 | return 0; |
1da177e4 LT |
1205 | } |
1206 | ||
b490bdd6 | 1207 | struct buffer_head *udf_bread(struct inode *inode, udf_pblk_t block, |
cb00ea35 | 1208 | int create, int *err) |
1da177e4 | 1209 | { |
cb00ea35 | 1210 | struct buffer_head *bh = NULL; |
32f123a3 JK |
1211 | struct udf_map_rq map = { |
1212 | .lblk = block, | |
1213 | .iflags = UDF_MAP_NOPREALLOC | (create ? UDF_MAP_CREATE : 0), | |
1214 | }; | |
1da177e4 | 1215 | |
32f123a3 JK |
1216 | *err = udf_map_block(inode, &map); |
1217 | if (*err || !(map.oflags & UDF_BLK_MAPPED)) | |
1218 | return NULL; | |
1219 | ||
1220 | bh = sb_getblk(inode->i_sb, map.pblk); | |
1221 | if (!bh) { | |
1222 | *err = -ENOMEM; | |
1da177e4 | 1223 | return NULL; |
32f123a3 JK |
1224 | } |
1225 | if (map.oflags & UDF_BLK_NEW) { | |
1226 | lock_buffer(bh); | |
1227 | memset(bh->b_data, 0x00, inode->i_sb->s_blocksize); | |
1228 | set_buffer_uptodate(bh); | |
1229 | unlock_buffer(bh); | |
1230 | mark_buffer_dirty_inode(bh, inode); | |
1231 | return bh; | |
1232 | } | |
1da177e4 | 1233 | |
59a16786 | 1234 | if (bh_read(bh, 0) >= 0) |
1da177e4 | 1235 | return bh; |
28de7948 | 1236 | |
1da177e4 LT |
1237 | brelse(bh); |
1238 | *err = -EIO; | |
1239 | return NULL; | |
1240 | } | |
1241 | ||
7e49b6f2 | 1242 | int udf_setsize(struct inode *inode, loff_t newsize) |
1da177e4 | 1243 | { |
b9a861fd | 1244 | int err = 0; |
48d6d8ff | 1245 | struct udf_inode_info *iinfo; |
89a4d970 | 1246 | unsigned int bsize = i_blocksize(inode); |
1da177e4 LT |
1247 | |
1248 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || | |
cb00ea35 | 1249 | S_ISLNK(inode->i_mode))) |
7e49b6f2 | 1250 | return -EINVAL; |
1da177e4 | 1251 | if (IS_APPEND(inode) || IS_IMMUTABLE(inode)) |
7e49b6f2 | 1252 | return -EPERM; |
1da177e4 | 1253 | |
b9a861fd | 1254 | filemap_invalidate_lock(inode->i_mapping); |
48d6d8ff | 1255 | iinfo = UDF_I(inode); |
7e49b6f2 | 1256 | if (newsize > inode->i_size) { |
7e49b6f2 | 1257 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { |
6a3b37e0 | 1258 | if (bsize >= |
7e49b6f2 | 1259 | (udf_file_entry_alloc_offset(inode) + newsize)) { |
d2eb8c35 | 1260 | down_write(&iinfo->i_data_sem); |
7e49b6f2 | 1261 | iinfo->i_lenAlloc = newsize; |
2d532616 | 1262 | up_write(&iinfo->i_data_sem); |
bb2b6d19 IA |
1263 | goto set_size; |
1264 | } | |
6a3b37e0 JK |
1265 | err = udf_expand_file_adinicb(inode); |
1266 | if (err) | |
b9a861fd | 1267 | goto out_unlock; |
7e49b6f2 JK |
1268 | } |
1269 | err = udf_extend_file(inode, newsize); | |
2d532616 | 1270 | if (err) |
b9a861fd | 1271 | goto out_unlock; |
bb2b6d19 | 1272 | set_size: |
f2e95355 | 1273 | truncate_setsize(inode, newsize); |
cb00ea35 | 1274 | } else { |
7e49b6f2 JK |
1275 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { |
1276 | down_write(&iinfo->i_data_sem); | |
99600051 | 1277 | udf_clear_extent_cache(inode); |
382a2287 | 1278 | memset(iinfo->i_data + iinfo->i_lenEAttr + newsize, |
7e49b6f2 JK |
1279 | 0x00, bsize - newsize - |
1280 | udf_file_entry_alloc_offset(inode)); | |
1281 | iinfo->i_lenAlloc = newsize; | |
1282 | truncate_setsize(inode, newsize); | |
1283 | up_write(&iinfo->i_data_sem); | |
1284 | goto update_time; | |
1285 | } | |
1286 | err = block_truncate_page(inode->i_mapping, newsize, | |
1287 | udf_get_block); | |
1288 | if (err) | |
b9a861fd | 1289 | goto out_unlock; |
f2e95355 | 1290 | truncate_setsize(inode, newsize); |
4d0fb621 | 1291 | down_write(&iinfo->i_data_sem); |
99600051 | 1292 | udf_clear_extent_cache(inode); |
2b42be5e | 1293 | err = udf_truncate_extents(inode); |
4d0fb621 | 1294 | up_write(&iinfo->i_data_sem); |
2b42be5e | 1295 | if (err) |
b9a861fd | 1296 | goto out_unlock; |
647bd61a | 1297 | } |
7e49b6f2 | 1298 | update_time: |
59ad88f2 | 1299 | inode->i_mtime = inode_set_ctime_current(inode); |
1da177e4 | 1300 | if (IS_SYNC(inode)) |
cb00ea35 | 1301 | udf_sync_inode(inode); |
1da177e4 LT |
1302 | else |
1303 | mark_inode_dirty(inode); | |
b9a861fd JK |
1304 | out_unlock: |
1305 | filemap_invalidate_unlock(inode->i_mapping); | |
1306 | return err; | |
1da177e4 LT |
1307 | } |
1308 | ||
c03aa9f6 JK |
1309 | /* |
1310 | * Maximum length of linked list formed by ICB hierarchy. The chosen number is | |
1311 | * arbitrary - just that we hopefully don't limit any real use of rewritten | |
1312 | * inode on write-once media but avoid looping for too long on corrupted media. | |
1313 | */ | |
1314 | #define UDF_MAX_ICB_NESTING 1024 | |
1315 | ||
6174c2eb | 1316 | static int udf_read_inode(struct inode *inode, bool hidden_inode) |
1da177e4 LT |
1317 | { |
1318 | struct buffer_head *bh = NULL; | |
1319 | struct fileEntry *fe; | |
bb7720a0 | 1320 | struct extendedFileEntry *efe; |
1da177e4 | 1321 | uint16_t ident; |
48d6d8ff | 1322 | struct udf_inode_info *iinfo = UDF_I(inode); |
bb7720a0 | 1323 | struct udf_sb_info *sbi = UDF_SB(inode->i_sb); |
6d3d5e86 | 1324 | struct kernel_lb_addr *iloc = &iinfo->i_location; |
bb7720a0 | 1325 | unsigned int link_count; |
c03aa9f6 | 1326 | unsigned int indirections = 0; |
79144954 | 1327 | int bs = inode->i_sb->s_blocksize; |
6d3d5e86 | 1328 | int ret = -EIO; |
0c9850f4 | 1329 | uint32_t uid, gid; |
59ad88f2 | 1330 | struct timespec64 ctime; |
1da177e4 | 1331 | |
c03aa9f6 | 1332 | reread: |
1d82a56b | 1333 | if (iloc->partitionReferenceNum >= sbi->s_partitions) { |
fcbf7637 | 1334 | udf_debug("partition reference: %u > logical volume partitions: %u\n", |
1d82a56b FF |
1335 | iloc->partitionReferenceNum, sbi->s_partitions); |
1336 | return -EIO; | |
1337 | } | |
1338 | ||
6d3d5e86 JK |
1339 | if (iloc->logicalBlockNum >= |
1340 | sbi->s_partmaps[iloc->partitionReferenceNum].s_partition_len) { | |
fcbf7637 | 1341 | udf_debug("block=%u, partition=%u out of range\n", |
6d3d5e86 JK |
1342 | iloc->logicalBlockNum, iloc->partitionReferenceNum); |
1343 | return -EIO; | |
1344 | } | |
1345 | ||
1da177e4 LT |
1346 | /* |
1347 | * Set defaults, but the inode is still incomplete! | |
1348 | * Note: get_new_inode() sets the following on a new inode: | |
1349 | * i_sb = sb | |
1350 | * i_no = ino | |
1351 | * i_flags = sb->s_flags | |
1352 | * i_state = 0 | |
1353 | * clean_inode(): zero fills and sets | |
1354 | * i_count = 1 | |
1355 | * i_nlink = 1 | |
1356 | * i_op = NULL; | |
1357 | */ | |
6d3d5e86 | 1358 | bh = udf_read_ptagged(inode->i_sb, iloc, 0, &ident); |
cb00ea35 | 1359 | if (!bh) { |
fcbf7637 | 1360 | udf_err(inode->i_sb, "(ino %lu) failed !bh\n", inode->i_ino); |
6d3d5e86 | 1361 | return -EIO; |
1da177e4 LT |
1362 | } |
1363 | ||
1364 | if (ident != TAG_IDENT_FE && ident != TAG_IDENT_EFE && | |
cb00ea35 | 1365 | ident != TAG_IDENT_USE) { |
fcbf7637 | 1366 | udf_err(inode->i_sb, "(ino %lu) failed ident=%u\n", |
78ace70c | 1367 | inode->i_ino, ident); |
6d3d5e86 | 1368 | goto out; |
1da177e4 LT |
1369 | } |
1370 | ||
1371 | fe = (struct fileEntry *)bh->b_data; | |
bb7720a0 | 1372 | efe = (struct extendedFileEntry *)bh->b_data; |
1da177e4 | 1373 | |
5e0f0017 | 1374 | if (fe->icbTag.strategyType == cpu_to_le16(4096)) { |
1ab92785 | 1375 | struct buffer_head *ibh; |
1da177e4 | 1376 | |
6d3d5e86 | 1377 | ibh = udf_read_ptagged(inode->i_sb, iloc, 1, &ident); |
1ab92785 | 1378 | if (ident == TAG_IDENT_IE && ibh) { |
5ca4e4be | 1379 | struct kernel_lb_addr loc; |
1ab92785 | 1380 | struct indirectEntry *ie; |
1381 | ||
1382 | ie = (struct indirectEntry *)ibh->b_data; | |
1383 | loc = lelb_to_cpu(ie->indirectICB.extLocation); | |
1384 | ||
c03aa9f6 | 1385 | if (ie->indirectICB.extLength) { |
c03aa9f6 JK |
1386 | brelse(ibh); |
1387 | memcpy(&iinfo->i_location, &loc, | |
1388 | sizeof(struct kernel_lb_addr)); | |
1389 | if (++indirections > UDF_MAX_ICB_NESTING) { | |
1390 | udf_err(inode->i_sb, | |
1391 | "too many ICBs in ICB hierarchy" | |
1392 | " (max %d supported)\n", | |
1393 | UDF_MAX_ICB_NESTING); | |
6d3d5e86 | 1394 | goto out; |
28de7948 | 1395 | } |
6d3d5e86 | 1396 | brelse(bh); |
c03aa9f6 | 1397 | goto reread; |
1da177e4 | 1398 | } |
28de7948 | 1399 | } |
1ab92785 | 1400 | brelse(ibh); |
5e0f0017 | 1401 | } else if (fe->icbTag.strategyType != cpu_to_le16(4)) { |
fcbf7637 | 1402 | udf_err(inode->i_sb, "unsupported strategy type: %u\n", |
78ace70c | 1403 | le16_to_cpu(fe->icbTag.strategyType)); |
6d3d5e86 | 1404 | goto out; |
1da177e4 | 1405 | } |
5e0f0017 | 1406 | if (fe->icbTag.strategyType == cpu_to_le16(4)) |
48d6d8ff | 1407 | iinfo->i_strat4096 = 0; |
5e0f0017 | 1408 | else /* if (fe->icbTag.strategyType == cpu_to_le16(4096)) */ |
48d6d8ff | 1409 | iinfo->i_strat4096 = 1; |
1da177e4 | 1410 | |
48d6d8ff | 1411 | iinfo->i_alloc_type = le16_to_cpu(fe->icbTag.flags) & |
4b11111a | 1412 | ICBTAG_FLAG_AD_MASK; |
d288d958 JK |
1413 | if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_SHORT && |
1414 | iinfo->i_alloc_type != ICBTAG_FLAG_AD_LONG && | |
1415 | iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { | |
1416 | ret = -EIO; | |
1417 | goto out; | |
1418 | } | |
fc8033a3 | 1419 | iinfo->i_hidden = hidden_inode; |
48d6d8ff MS |
1420 | iinfo->i_unique = 0; |
1421 | iinfo->i_lenEAttr = 0; | |
1422 | iinfo->i_lenExtents = 0; | |
1423 | iinfo->i_lenAlloc = 0; | |
1424 | iinfo->i_next_alloc_block = 0; | |
1425 | iinfo->i_next_alloc_goal = 0; | |
5e0f0017 | 1426 | if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_EFE)) { |
48d6d8ff MS |
1427 | iinfo->i_efe = 1; |
1428 | iinfo->i_use = 0; | |
79144954 | 1429 | ret = udf_alloc_i_data(inode, bs - |
6d3d5e86 JK |
1430 | sizeof(struct extendedFileEntry)); |
1431 | if (ret) | |
1432 | goto out; | |
382a2287 | 1433 | memcpy(iinfo->i_data, |
4b11111a | 1434 | bh->b_data + sizeof(struct extendedFileEntry), |
79144954 | 1435 | bs - sizeof(struct extendedFileEntry)); |
5e0f0017 | 1436 | } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_FE)) { |
48d6d8ff MS |
1437 | iinfo->i_efe = 0; |
1438 | iinfo->i_use = 0; | |
79144954 | 1439 | ret = udf_alloc_i_data(inode, bs - sizeof(struct fileEntry)); |
6d3d5e86 JK |
1440 | if (ret) |
1441 | goto out; | |
382a2287 | 1442 | memcpy(iinfo->i_data, |
c0b34438 | 1443 | bh->b_data + sizeof(struct fileEntry), |
79144954 | 1444 | bs - sizeof(struct fileEntry)); |
5e0f0017 | 1445 | } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_USE)) { |
48d6d8ff MS |
1446 | iinfo->i_efe = 0; |
1447 | iinfo->i_use = 1; | |
1448 | iinfo->i_lenAlloc = le32_to_cpu( | |
4b11111a MS |
1449 | ((struct unallocSpaceEntry *)bh->b_data)-> |
1450 | lengthAllocDescs); | |
79144954 | 1451 | ret = udf_alloc_i_data(inode, bs - |
6d3d5e86 JK |
1452 | sizeof(struct unallocSpaceEntry)); |
1453 | if (ret) | |
1454 | goto out; | |
382a2287 | 1455 | memcpy(iinfo->i_data, |
4b11111a | 1456 | bh->b_data + sizeof(struct unallocSpaceEntry), |
79144954 | 1457 | bs - sizeof(struct unallocSpaceEntry)); |
6d3d5e86 | 1458 | return 0; |
1da177e4 LT |
1459 | } |
1460 | ||
6d3d5e86 | 1461 | ret = -EIO; |
c03cad24 | 1462 | read_lock(&sbi->s_cred_lock); |
0c9850f4 JK |
1463 | uid = le32_to_cpu(fe->uid); |
1464 | if (uid == UDF_INVALID_ID || | |
ca76d2d8 | 1465 | UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_SET)) |
0c9850f4 JK |
1466 | inode->i_uid = sbi->s_uid; |
1467 | else | |
1468 | i_uid_write(inode, uid); | |
1da177e4 | 1469 | |
0c9850f4 JK |
1470 | gid = le32_to_cpu(fe->gid); |
1471 | if (gid == UDF_INVALID_ID || | |
ca76d2d8 | 1472 | UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_SET)) |
0c9850f4 JK |
1473 | inode->i_gid = sbi->s_gid; |
1474 | else | |
1475 | i_gid_write(inode, gid); | |
1da177e4 | 1476 | |
7ac9bcd5 | 1477 | if (fe->icbTag.fileType != ICBTAG_FILE_TYPE_DIRECTORY && |
87bc730c | 1478 | sbi->s_fmode != UDF_INVALID_MODE) |
7ac9bcd5 MS |
1479 | inode->i_mode = sbi->s_fmode; |
1480 | else if (fe->icbTag.fileType == ICBTAG_FILE_TYPE_DIRECTORY && | |
87bc730c | 1481 | sbi->s_dmode != UDF_INVALID_MODE) |
7ac9bcd5 MS |
1482 | inode->i_mode = sbi->s_dmode; |
1483 | else | |
1484 | inode->i_mode = udf_convert_permissions(fe); | |
1485 | inode->i_mode &= ~sbi->s_umask; | |
c3367a1b SM |
1486 | iinfo->i_extraPerms = le32_to_cpu(fe->permissions) & ~FE_MAPPED_PERMS; |
1487 | ||
c03cad24 JK |
1488 | read_unlock(&sbi->s_cred_lock); |
1489 | ||
bfe86848 | 1490 | link_count = le16_to_cpu(fe->fileLinkCount); |
4071b913 | 1491 | if (!link_count) { |
6174c2eb JK |
1492 | if (!hidden_inode) { |
1493 | ret = -ESTALE; | |
1494 | goto out; | |
1495 | } | |
1496 | link_count = 1; | |
4071b913 | 1497 | } |
bfe86848 | 1498 | set_nlink(inode, link_count); |
c03cad24 JK |
1499 | |
1500 | inode->i_size = le64_to_cpu(fe->informationLength); | |
1501 | iinfo->i_lenExtents = inode->i_size; | |
1da177e4 | 1502 | |
48d6d8ff | 1503 | if (iinfo->i_efe == 0) { |
1da177e4 | 1504 | inode->i_blocks = le64_to_cpu(fe->logicalBlocksRecorded) << |
28de7948 | 1505 | (inode->i_sb->s_blocksize_bits - 9); |
1da177e4 | 1506 | |
c3b9cecd AB |
1507 | udf_disk_stamp_to_time(&inode->i_atime, fe->accessTime); |
1508 | udf_disk_stamp_to_time(&inode->i_mtime, fe->modificationTime); | |
59ad88f2 JL |
1509 | udf_disk_stamp_to_time(&ctime, fe->attrTime); |
1510 | inode_set_ctime_to_ts(inode, ctime); | |
1da177e4 | 1511 | |
48d6d8ff MS |
1512 | iinfo->i_unique = le64_to_cpu(fe->uniqueID); |
1513 | iinfo->i_lenEAttr = le32_to_cpu(fe->lengthExtendedAttr); | |
1514 | iinfo->i_lenAlloc = le32_to_cpu(fe->lengthAllocDescs); | |
d5e2cf07 | 1515 | iinfo->i_checkpoint = le32_to_cpu(fe->checkpoint); |
ab9a3a73 SM |
1516 | iinfo->i_streamdir = 0; |
1517 | iinfo->i_lenStreams = 0; | |
cb00ea35 | 1518 | } else { |
647bd61a | 1519 | inode->i_blocks = le64_to_cpu(efe->logicalBlocksRecorded) << |
cb00ea35 | 1520 | (inode->i_sb->s_blocksize_bits - 9); |
1da177e4 | 1521 | |
c3b9cecd AB |
1522 | udf_disk_stamp_to_time(&inode->i_atime, efe->accessTime); |
1523 | udf_disk_stamp_to_time(&inode->i_mtime, efe->modificationTime); | |
0220edda | 1524 | udf_disk_stamp_to_time(&iinfo->i_crtime, efe->createTime); |
59ad88f2 JL |
1525 | udf_disk_stamp_to_time(&ctime, efe->attrTime); |
1526 | inode_set_ctime_to_ts(inode, ctime); | |
1da177e4 | 1527 | |
48d6d8ff MS |
1528 | iinfo->i_unique = le64_to_cpu(efe->uniqueID); |
1529 | iinfo->i_lenEAttr = le32_to_cpu(efe->lengthExtendedAttr); | |
1530 | iinfo->i_lenAlloc = le32_to_cpu(efe->lengthAllocDescs); | |
d5e2cf07 | 1531 | iinfo->i_checkpoint = le32_to_cpu(efe->checkpoint); |
ab9a3a73 SM |
1532 | |
1533 | /* Named streams */ | |
1534 | iinfo->i_streamdir = (efe->streamDirectoryICB.extLength != 0); | |
1535 | iinfo->i_locStreamdir = | |
1536 | lelb_to_cpu(efe->streamDirectoryICB.extLocation); | |
1537 | iinfo->i_lenStreams = le64_to_cpu(efe->objectSize); | |
1538 | if (iinfo->i_lenStreams >= inode->i_size) | |
1539 | iinfo->i_lenStreams -= inode->i_size; | |
1540 | else | |
1541 | iinfo->i_lenStreams = 0; | |
1da177e4 | 1542 | } |
470cca56 | 1543 | inode->i_generation = iinfo->i_unique; |
1da177e4 | 1544 | |
23b133bd JK |
1545 | /* |
1546 | * Sanity check length of allocation descriptors and extended attrs to | |
1547 | * avoid integer overflows | |
1548 | */ | |
1549 | if (iinfo->i_lenEAttr > bs || iinfo->i_lenAlloc > bs) | |
1550 | goto out; | |
1551 | /* Now do exact checks */ | |
1552 | if (udf_file_entry_alloc_offset(inode) + iinfo->i_lenAlloc > bs) | |
1553 | goto out; | |
e159332b JK |
1554 | /* Sanity checks for files in ICB so that we don't get confused later */ |
1555 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { | |
1556 | /* | |
1557 | * For file in ICB data is stored in allocation descriptor | |
1558 | * so sizes should match | |
1559 | */ | |
1560 | if (iinfo->i_lenAlloc != inode->i_size) | |
1561 | goto out; | |
1562 | /* File in ICB has to fit in there... */ | |
79144954 | 1563 | if (inode->i_size > bs - udf_file_entry_alloc_offset(inode)) |
e159332b JK |
1564 | goto out; |
1565 | } | |
1566 | ||
cb00ea35 CG |
1567 | switch (fe->icbTag.fileType) { |
1568 | case ICBTAG_FILE_TYPE_DIRECTORY: | |
28de7948 CG |
1569 | inode->i_op = &udf_dir_inode_operations; |
1570 | inode->i_fop = &udf_dir_operations; | |
1571 | inode->i_mode |= S_IFDIR; | |
1572 | inc_nlink(inode); | |
1573 | break; | |
cb00ea35 CG |
1574 | case ICBTAG_FILE_TYPE_REALTIME: |
1575 | case ICBTAG_FILE_TYPE_REGULAR: | |
1576 | case ICBTAG_FILE_TYPE_UNDEF: | |
742e1795 | 1577 | case ICBTAG_FILE_TYPE_VAT20: |
37a8a39f | 1578 | inode->i_data.a_ops = &udf_aops; |
28de7948 CG |
1579 | inode->i_op = &udf_file_inode_operations; |
1580 | inode->i_fop = &udf_file_operations; | |
1581 | inode->i_mode |= S_IFREG; | |
1582 | break; | |
cb00ea35 | 1583 | case ICBTAG_FILE_TYPE_BLOCK: |
28de7948 CG |
1584 | inode->i_mode |= S_IFBLK; |
1585 | break; | |
cb00ea35 | 1586 | case ICBTAG_FILE_TYPE_CHAR: |
28de7948 CG |
1587 | inode->i_mode |= S_IFCHR; |
1588 | break; | |
cb00ea35 | 1589 | case ICBTAG_FILE_TYPE_FIFO: |
28de7948 CG |
1590 | init_special_inode(inode, inode->i_mode | S_IFIFO, 0); |
1591 | break; | |
cb00ea35 | 1592 | case ICBTAG_FILE_TYPE_SOCKET: |
28de7948 CG |
1593 | init_special_inode(inode, inode->i_mode | S_IFSOCK, 0); |
1594 | break; | |
cb00ea35 | 1595 | case ICBTAG_FILE_TYPE_SYMLINK: |
28de7948 | 1596 | inode->i_data.a_ops = &udf_symlink_aops; |
ad4d0532 | 1597 | inode->i_op = &udf_symlink_inode_operations; |
21fc61c7 | 1598 | inode_nohighmem(inode); |
6ff6b2b3 | 1599 | inode->i_mode = S_IFLNK | 0777; |
28de7948 | 1600 | break; |
bfb257a5 JK |
1601 | case ICBTAG_FILE_TYPE_MAIN: |
1602 | udf_debug("METADATA FILE-----\n"); | |
1603 | break; | |
1604 | case ICBTAG_FILE_TYPE_MIRROR: | |
1605 | udf_debug("METADATA MIRROR FILE-----\n"); | |
1606 | break; | |
1607 | case ICBTAG_FILE_TYPE_BITMAP: | |
1608 | udf_debug("METADATA BITMAP FILE-----\n"); | |
1609 | break; | |
cb00ea35 | 1610 | default: |
fcbf7637 | 1611 | udf_err(inode->i_sb, "(ino %lu) failed unknown file type=%u\n", |
78ace70c | 1612 | inode->i_ino, fe->icbTag.fileType); |
6d3d5e86 | 1613 | goto out; |
1da177e4 | 1614 | } |
cb00ea35 | 1615 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { |
4b11111a MS |
1616 | struct deviceSpec *dsea = |
1617 | (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1); | |
cb00ea35 CG |
1618 | if (dsea) { |
1619 | init_special_inode(inode, inode->i_mode, | |
4b11111a MS |
1620 | MKDEV(le32_to_cpu(dsea->majorDeviceIdent), |
1621 | le32_to_cpu(dsea->minorDeviceIdent))); | |
1da177e4 | 1622 | /* Developer ID ??? */ |
4b11111a | 1623 | } else |
6d3d5e86 | 1624 | goto out; |
1da177e4 | 1625 | } |
6d3d5e86 JK |
1626 | ret = 0; |
1627 | out: | |
bb7720a0 | 1628 | brelse(bh); |
6d3d5e86 | 1629 | return ret; |
1da177e4 LT |
1630 | } |
1631 | ||
647bd61a CG |
1632 | static int udf_alloc_i_data(struct inode *inode, size_t size) |
1633 | { | |
48d6d8ff | 1634 | struct udf_inode_info *iinfo = UDF_I(inode); |
382a2287 JK |
1635 | iinfo->i_data = kmalloc(size, GFP_KERNEL); |
1636 | if (!iinfo->i_data) | |
647bd61a | 1637 | return -ENOMEM; |
647bd61a CG |
1638 | return 0; |
1639 | } | |
1640 | ||
faa17292 | 1641 | static umode_t udf_convert_permissions(struct fileEntry *fe) |
1da177e4 | 1642 | { |
faa17292 | 1643 | umode_t mode; |
1da177e4 LT |
1644 | uint32_t permissions; |
1645 | uint32_t flags; | |
1646 | ||
1647 | permissions = le32_to_cpu(fe->permissions); | |
1648 | flags = le16_to_cpu(fe->icbTag.flags); | |
1649 | ||
6ff6b2b3 FF |
1650 | mode = ((permissions) & 0007) | |
1651 | ((permissions >> 2) & 0070) | | |
1652 | ((permissions >> 4) & 0700) | | |
4b11111a MS |
1653 | ((flags & ICBTAG_FLAG_SETUID) ? S_ISUID : 0) | |
1654 | ((flags & ICBTAG_FLAG_SETGID) ? S_ISGID : 0) | | |
1655 | ((flags & ICBTAG_FLAG_STICKY) ? S_ISVTX : 0); | |
1da177e4 LT |
1656 | |
1657 | return mode; | |
1658 | } | |
1659 | ||
c3367a1b SM |
1660 | void udf_update_extra_perms(struct inode *inode, umode_t mode) |
1661 | { | |
1662 | struct udf_inode_info *iinfo = UDF_I(inode); | |
1663 | ||
1664 | /* | |
1665 | * UDF 2.01 sec. 3.3.3.3 Note 2: | |
1666 | * In Unix, delete permission tracks write | |
1667 | */ | |
1668 | iinfo->i_extraPerms &= ~FE_DELETE_PERMS; | |
1669 | if (mode & 0200) | |
1670 | iinfo->i_extraPerms |= FE_PERM_U_DELETE; | |
1671 | if (mode & 0020) | |
1672 | iinfo->i_extraPerms |= FE_PERM_G_DELETE; | |
1673 | if (mode & 0002) | |
1674 | iinfo->i_extraPerms |= FE_PERM_O_DELETE; | |
1675 | } | |
1676 | ||
a9185b41 | 1677 | int udf_write_inode(struct inode *inode, struct writeback_control *wbc) |
1da177e4 | 1678 | { |
49521de1 | 1679 | return udf_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL); |
1da177e4 LT |
1680 | } |
1681 | ||
49521de1 | 1682 | static int udf_sync_inode(struct inode *inode) |
1da177e4 LT |
1683 | { |
1684 | return udf_update_inode(inode, 1); | |
1685 | } | |
1686 | ||
c3b9cecd | 1687 | static void udf_adjust_time(struct udf_inode_info *iinfo, struct timespec64 time) |
7ed0fbd7 FF |
1688 | { |
1689 | if (iinfo->i_crtime.tv_sec > time.tv_sec || | |
1690 | (iinfo->i_crtime.tv_sec == time.tv_sec && | |
1691 | iinfo->i_crtime.tv_nsec > time.tv_nsec)) | |
1692 | iinfo->i_crtime = time; | |
1693 | } | |
1694 | ||
cb00ea35 | 1695 | static int udf_update_inode(struct inode *inode, int do_sync) |
1da177e4 LT |
1696 | { |
1697 | struct buffer_head *bh = NULL; | |
1698 | struct fileEntry *fe; | |
1699 | struct extendedFileEntry *efe; | |
b2527bfa | 1700 | uint64_t lb_recorded; |
1da177e4 LT |
1701 | uint32_t udfperms; |
1702 | uint16_t icbflags; | |
1703 | uint16_t crclen; | |
1da177e4 | 1704 | int err = 0; |
6c79e987 | 1705 | struct udf_sb_info *sbi = UDF_SB(inode->i_sb); |
4b11111a | 1706 | unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; |
48d6d8ff | 1707 | struct udf_inode_info *iinfo = UDF_I(inode); |
1da177e4 | 1708 | |
101ee137 | 1709 | bh = sb_getblk(inode->i_sb, |
5833ded9 | 1710 | udf_get_lb_pblock(inode->i_sb, &iinfo->i_location, 0)); |
cb00ea35 | 1711 | if (!bh) { |
aae917cd | 1712 | udf_debug("getblk failure\n"); |
0fd2ba36 | 1713 | return -EIO; |
1da177e4 LT |
1714 | } |
1715 | ||
aae917cd JK |
1716 | lock_buffer(bh); |
1717 | memset(bh->b_data, 0, inode->i_sb->s_blocksize); | |
1da177e4 LT |
1718 | fe = (struct fileEntry *)bh->b_data; |
1719 | efe = (struct extendedFileEntry *)bh->b_data; | |
1720 | ||
aae917cd | 1721 | if (iinfo->i_use) { |
1da177e4 | 1722 | struct unallocSpaceEntry *use = |
28de7948 | 1723 | (struct unallocSpaceEntry *)bh->b_data; |
1da177e4 | 1724 | |
48d6d8ff | 1725 | use->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc); |
4b11111a | 1726 | memcpy(bh->b_data + sizeof(struct unallocSpaceEntry), |
382a2287 | 1727 | iinfo->i_data, inode->i_sb->s_blocksize - |
4b11111a | 1728 | sizeof(struct unallocSpaceEntry)); |
aae917cd | 1729 | use->descTag.tagIdent = cpu_to_le16(TAG_IDENT_USE); |
70f19f58 | 1730 | crclen = sizeof(struct unallocSpaceEntry); |
1da177e4 | 1731 | |
70f19f58 | 1732 | goto finish; |
1da177e4 LT |
1733 | } |
1734 | ||
4d6660eb | 1735 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_FORGET)) |
0c9850f4 | 1736 | fe->uid = cpu_to_le32(UDF_INVALID_ID); |
cb00ea35 | 1737 | else |
c2ba138a | 1738 | fe->uid = cpu_to_le32(i_uid_read(inode)); |
1da177e4 | 1739 | |
4d6660eb | 1740 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_FORGET)) |
0c9850f4 | 1741 | fe->gid = cpu_to_le32(UDF_INVALID_ID); |
cb00ea35 | 1742 | else |
c2ba138a | 1743 | fe->gid = cpu_to_le32(i_gid_read(inode)); |
1da177e4 | 1744 | |
6ff6b2b3 FF |
1745 | udfperms = ((inode->i_mode & 0007)) | |
1746 | ((inode->i_mode & 0070) << 2) | | |
1747 | ((inode->i_mode & 0700) << 4); | |
1da177e4 | 1748 | |
c3367a1b | 1749 | udfperms |= iinfo->i_extraPerms; |
1da177e4 LT |
1750 | fe->permissions = cpu_to_le32(udfperms); |
1751 | ||
8a70ee33 | 1752 | if (S_ISDIR(inode->i_mode) && inode->i_nlink > 0) |
1da177e4 | 1753 | fe->fileLinkCount = cpu_to_le16(inode->i_nlink - 1); |
fc8033a3 JK |
1754 | else { |
1755 | if (iinfo->i_hidden) | |
1756 | fe->fileLinkCount = cpu_to_le16(0); | |
1757 | else | |
1758 | fe->fileLinkCount = cpu_to_le16(inode->i_nlink); | |
1759 | } | |
1da177e4 LT |
1760 | |
1761 | fe->informationLength = cpu_to_le64(inode->i_size); | |
1762 | ||
cb00ea35 | 1763 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { |
5ca4e4be | 1764 | struct regid *eid; |
28de7948 CG |
1765 | struct deviceSpec *dsea = |
1766 | (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1); | |
cb00ea35 | 1767 | if (!dsea) { |
1da177e4 | 1768 | dsea = (struct deviceSpec *) |
28de7948 CG |
1769 | udf_add_extendedattr(inode, |
1770 | sizeof(struct deviceSpec) + | |
5ca4e4be | 1771 | sizeof(struct regid), 12, 0x3); |
1da177e4 LT |
1772 | dsea->attrType = cpu_to_le32(12); |
1773 | dsea->attrSubtype = 1; | |
4b11111a MS |
1774 | dsea->attrLength = cpu_to_le32( |
1775 | sizeof(struct deviceSpec) + | |
5ca4e4be PE |
1776 | sizeof(struct regid)); |
1777 | dsea->impUseLength = cpu_to_le32(sizeof(struct regid)); | |
1da177e4 | 1778 | } |
5ca4e4be | 1779 | eid = (struct regid *)dsea->impUse; |
033c9da0 | 1780 | memset(eid, 0, sizeof(*eid)); |
1da177e4 LT |
1781 | strcpy(eid->ident, UDF_ID_DEVELOPER); |
1782 | eid->identSuffix[0] = UDF_OS_CLASS_UNIX; | |
1783 | eid->identSuffix[1] = UDF_OS_ID_LINUX; | |
1784 | dsea->majorDeviceIdent = cpu_to_le32(imajor(inode)); | |
1785 | dsea->minorDeviceIdent = cpu_to_le32(iminor(inode)); | |
1786 | } | |
1787 | ||
b2527bfa SN |
1788 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1789 | lb_recorded = 0; /* No extents => no blocks! */ | |
1790 | else | |
1791 | lb_recorded = | |
1792 | (inode->i_blocks + (1 << (blocksize_bits - 9)) - 1) >> | |
1793 | (blocksize_bits - 9); | |
1794 | ||
48d6d8ff | 1795 | if (iinfo->i_efe == 0) { |
c0b34438 | 1796 | memcpy(bh->b_data + sizeof(struct fileEntry), |
382a2287 | 1797 | iinfo->i_data, |
cb00ea35 | 1798 | inode->i_sb->s_blocksize - sizeof(struct fileEntry)); |
b2527bfa | 1799 | fe->logicalBlocksRecorded = cpu_to_le64(lb_recorded); |
1da177e4 | 1800 | |
c3b9cecd AB |
1801 | udf_time_to_disk_stamp(&fe->accessTime, inode->i_atime); |
1802 | udf_time_to_disk_stamp(&fe->modificationTime, inode->i_mtime); | |
59ad88f2 | 1803 | udf_time_to_disk_stamp(&fe->attrTime, inode_get_ctime(inode)); |
5ca4e4be | 1804 | memset(&(fe->impIdent), 0, sizeof(struct regid)); |
1da177e4 LT |
1805 | strcpy(fe->impIdent.ident, UDF_ID_DEVELOPER); |
1806 | fe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; | |
1807 | fe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; | |
48d6d8ff MS |
1808 | fe->uniqueID = cpu_to_le64(iinfo->i_unique); |
1809 | fe->lengthExtendedAttr = cpu_to_le32(iinfo->i_lenEAttr); | |
1810 | fe->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc); | |
d5e2cf07 | 1811 | fe->checkpoint = cpu_to_le32(iinfo->i_checkpoint); |
1da177e4 LT |
1812 | fe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_FE); |
1813 | crclen = sizeof(struct fileEntry); | |
cb00ea35 | 1814 | } else { |
4b11111a | 1815 | memcpy(bh->b_data + sizeof(struct extendedFileEntry), |
382a2287 | 1816 | iinfo->i_data, |
4b11111a MS |
1817 | inode->i_sb->s_blocksize - |
1818 | sizeof(struct extendedFileEntry)); | |
ab9a3a73 SM |
1819 | efe->objectSize = |
1820 | cpu_to_le64(inode->i_size + iinfo->i_lenStreams); | |
b2527bfa | 1821 | efe->logicalBlocksRecorded = cpu_to_le64(lb_recorded); |
1da177e4 | 1822 | |
ab9a3a73 SM |
1823 | if (iinfo->i_streamdir) { |
1824 | struct long_ad *icb_lad = &efe->streamDirectoryICB; | |
1825 | ||
1826 | icb_lad->extLocation = | |
1827 | cpu_to_lelb(iinfo->i_locStreamdir); | |
1828 | icb_lad->extLength = | |
1829 | cpu_to_le32(inode->i_sb->s_blocksize); | |
1830 | } | |
1831 | ||
c3b9cecd AB |
1832 | udf_adjust_time(iinfo, inode->i_atime); |
1833 | udf_adjust_time(iinfo, inode->i_mtime); | |
59ad88f2 | 1834 | udf_adjust_time(iinfo, inode_get_ctime(inode)); |
1da177e4 | 1835 | |
c3b9cecd AB |
1836 | udf_time_to_disk_stamp(&efe->accessTime, inode->i_atime); |
1837 | udf_time_to_disk_stamp(&efe->modificationTime, inode->i_mtime); | |
56774805 | 1838 | udf_time_to_disk_stamp(&efe->createTime, iinfo->i_crtime); |
59ad88f2 | 1839 | udf_time_to_disk_stamp(&efe->attrTime, inode_get_ctime(inode)); |
1da177e4 | 1840 | |
033c9da0 | 1841 | memset(&(efe->impIdent), 0, sizeof(efe->impIdent)); |
1da177e4 LT |
1842 | strcpy(efe->impIdent.ident, UDF_ID_DEVELOPER); |
1843 | efe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; | |
1844 | efe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; | |
48d6d8ff MS |
1845 | efe->uniqueID = cpu_to_le64(iinfo->i_unique); |
1846 | efe->lengthExtendedAttr = cpu_to_le32(iinfo->i_lenEAttr); | |
1847 | efe->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc); | |
d5e2cf07 | 1848 | efe->checkpoint = cpu_to_le32(iinfo->i_checkpoint); |
1da177e4 LT |
1849 | efe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_EFE); |
1850 | crclen = sizeof(struct extendedFileEntry); | |
1851 | } | |
70f19f58 SM |
1852 | |
1853 | finish: | |
48d6d8ff | 1854 | if (iinfo->i_strat4096) { |
1da177e4 LT |
1855 | fe->icbTag.strategyType = cpu_to_le16(4096); |
1856 | fe->icbTag.strategyParameter = cpu_to_le16(1); | |
1857 | fe->icbTag.numEntries = cpu_to_le16(2); | |
cb00ea35 | 1858 | } else { |
1da177e4 LT |
1859 | fe->icbTag.strategyType = cpu_to_le16(4); |
1860 | fe->icbTag.numEntries = cpu_to_le16(1); | |
1861 | } | |
1862 | ||
70f19f58 SM |
1863 | if (iinfo->i_use) |
1864 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_USE; | |
1865 | else if (S_ISDIR(inode->i_mode)) | |
1da177e4 LT |
1866 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_DIRECTORY; |
1867 | else if (S_ISREG(inode->i_mode)) | |
1868 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_REGULAR; | |
1869 | else if (S_ISLNK(inode->i_mode)) | |
1870 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_SYMLINK; | |
1871 | else if (S_ISBLK(inode->i_mode)) | |
1872 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_BLOCK; | |
1873 | else if (S_ISCHR(inode->i_mode)) | |
1874 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_CHAR; | |
1875 | else if (S_ISFIFO(inode->i_mode)) | |
1876 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_FIFO; | |
1877 | else if (S_ISSOCK(inode->i_mode)) | |
1878 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_SOCKET; | |
1879 | ||
48d6d8ff | 1880 | icbflags = iinfo->i_alloc_type | |
28de7948 CG |
1881 | ((inode->i_mode & S_ISUID) ? ICBTAG_FLAG_SETUID : 0) | |
1882 | ((inode->i_mode & S_ISGID) ? ICBTAG_FLAG_SETGID : 0) | | |
1883 | ((inode->i_mode & S_ISVTX) ? ICBTAG_FLAG_STICKY : 0) | | |
1884 | (le16_to_cpu(fe->icbTag.flags) & | |
1885 | ~(ICBTAG_FLAG_AD_MASK | ICBTAG_FLAG_SETUID | | |
1886 | ICBTAG_FLAG_SETGID | ICBTAG_FLAG_STICKY)); | |
1da177e4 LT |
1887 | |
1888 | fe->icbTag.flags = cpu_to_le16(icbflags); | |
6c79e987 | 1889 | if (sbi->s_udfrev >= 0x0200) |
1da177e4 LT |
1890 | fe->descTag.descVersion = cpu_to_le16(3); |
1891 | else | |
1892 | fe->descTag.descVersion = cpu_to_le16(2); | |
6c79e987 | 1893 | fe->descTag.tagSerialNum = cpu_to_le16(sbi->s_serial_number); |
4b11111a | 1894 | fe->descTag.tagLocation = cpu_to_le32( |
48d6d8ff | 1895 | iinfo->i_location.logicalBlockNum); |
aae917cd | 1896 | crclen += iinfo->i_lenEAttr + iinfo->i_lenAlloc - sizeof(struct tag); |
1da177e4 | 1897 | fe->descTag.descCRCLength = cpu_to_le16(crclen); |
5ca4e4be | 1898 | fe->descTag.descCRC = cpu_to_le16(crc_itu_t(0, (char *)fe + sizeof(struct tag), |
f845fced | 1899 | crclen)); |
3f2587bb | 1900 | fe->descTag.tagChecksum = udf_tag_checksum(&fe->descTag); |
1da177e4 | 1901 | |
5833ded9 | 1902 | set_buffer_uptodate(bh); |
aae917cd JK |
1903 | unlock_buffer(bh); |
1904 | ||
1da177e4 LT |
1905 | /* write the data blocks */ |
1906 | mark_buffer_dirty(bh); | |
cb00ea35 | 1907 | if (do_sync) { |
1da177e4 | 1908 | sync_dirty_buffer(bh); |
aae917cd | 1909 | if (buffer_write_io_error(bh)) { |
78ace70c JP |
1910 | udf_warn(inode->i_sb, "IO error syncing udf inode [%08lx]\n", |
1911 | inode->i_ino); | |
1da177e4 LT |
1912 | err = -EIO; |
1913 | } | |
1914 | } | |
3bf25cb4 | 1915 | brelse(bh); |
28de7948 | 1916 | |
1da177e4 LT |
1917 | return err; |
1918 | } | |
1919 | ||
6174c2eb JK |
1920 | struct inode *__udf_iget(struct super_block *sb, struct kernel_lb_addr *ino, |
1921 | bool hidden_inode) | |
1da177e4 LT |
1922 | { |
1923 | unsigned long block = udf_get_lb_pblock(sb, ino, 0); | |
1924 | struct inode *inode = iget_locked(sb, block); | |
6d3d5e86 | 1925 | int err; |
1da177e4 LT |
1926 | |
1927 | if (!inode) | |
6d3d5e86 | 1928 | return ERR_PTR(-ENOMEM); |
1da177e4 | 1929 | |
85a37983 JK |
1930 | if (!(inode->i_state & I_NEW)) { |
1931 | if (UDF_I(inode)->i_hidden != hidden_inode) { | |
1932 | iput(inode); | |
1933 | return ERR_PTR(-EFSCORRUPTED); | |
1934 | } | |
6d3d5e86 | 1935 | return inode; |
85a37983 | 1936 | } |
1da177e4 | 1937 | |
6d3d5e86 | 1938 | memcpy(&UDF_I(inode)->i_location, ino, sizeof(struct kernel_lb_addr)); |
6174c2eb | 1939 | err = udf_read_inode(inode, hidden_inode); |
6d3d5e86 JK |
1940 | if (err < 0) { |
1941 | iget_failed(inode); | |
1942 | return ERR_PTR(err); | |
1da177e4 | 1943 | } |
6d3d5e86 | 1944 | unlock_new_inode(inode); |
1da177e4 LT |
1945 | |
1946 | return inode; | |
1da177e4 LT |
1947 | } |
1948 | ||
b490bdd6 | 1949 | int udf_setup_indirect_aext(struct inode *inode, udf_pblk_t block, |
fcea62ba | 1950 | struct extent_position *epos) |
1da177e4 | 1951 | { |
fcea62ba JK |
1952 | struct super_block *sb = inode->i_sb; |
1953 | struct buffer_head *bh; | |
1da177e4 | 1954 | struct allocExtDesc *aed; |
fcea62ba JK |
1955 | struct extent_position nepos; |
1956 | struct kernel_lb_addr neloc; | |
1957 | int ver, adsize; | |
1da177e4 | 1958 | |
fcea62ba JK |
1959 | if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
1960 | adsize = sizeof(struct short_ad); | |
1961 | else if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_LONG) | |
1962 | adsize = sizeof(struct long_ad); | |
1da177e4 | 1963 | else |
4f1b1519 | 1964 | return -EIO; |
fcea62ba JK |
1965 | |
1966 | neloc.logicalBlockNum = block; | |
1967 | neloc.partitionReferenceNum = epos->block.partitionReferenceNum; | |
1968 | ||
101ee137 | 1969 | bh = sb_getblk(sb, udf_get_lb_pblock(sb, &neloc, 0)); |
fcea62ba JK |
1970 | if (!bh) |
1971 | return -EIO; | |
1972 | lock_buffer(bh); | |
1973 | memset(bh->b_data, 0x00, sb->s_blocksize); | |
1974 | set_buffer_uptodate(bh); | |
1975 | unlock_buffer(bh); | |
1976 | mark_buffer_dirty_inode(bh, inode); | |
1977 | ||
1978 | aed = (struct allocExtDesc *)(bh->b_data); | |
1979 | if (!UDF_QUERY_FLAG(sb, UDF_FLAG_STRICT)) { | |
1980 | aed->previousAllocExtLocation = | |
1981 | cpu_to_le32(epos->block.logicalBlockNum); | |
1982 | } | |
1983 | aed->lengthAllocDescs = cpu_to_le32(0); | |
1984 | if (UDF_SB(sb)->s_udfrev >= 0x0200) | |
1985 | ver = 3; | |
1da177e4 | 1986 | else |
fcea62ba JK |
1987 | ver = 2; |
1988 | udf_new_tag(bh->b_data, TAG_IDENT_AED, ver, 1, block, | |
1989 | sizeof(struct tag)); | |
1990 | ||
1991 | nepos.block = neloc; | |
1992 | nepos.offset = sizeof(struct allocExtDesc); | |
1993 | nepos.bh = bh; | |
1994 | ||
1995 | /* | |
1996 | * Do we have to copy current last extent to make space for indirect | |
1997 | * one? | |
1998 | */ | |
1999 | if (epos->offset + adsize > sb->s_blocksize) { | |
2000 | struct kernel_lb_addr cp_loc; | |
2001 | uint32_t cp_len; | |
2002 | int cp_type; | |
2003 | ||
2004 | epos->offset -= adsize; | |
2005 | cp_type = udf_current_aext(inode, epos, &cp_loc, &cp_len, 0); | |
2006 | cp_len |= ((uint32_t)cp_type) << 30; | |
2007 | ||
2008 | __udf_add_aext(inode, &nepos, &cp_loc, cp_len, 1); | |
2009 | udf_write_aext(inode, epos, &nepos.block, | |
800552ce | 2010 | sb->s_blocksize | EXT_NEXT_EXTENT_ALLOCDESCS, 0); |
fcea62ba JK |
2011 | } else { |
2012 | __udf_add_aext(inode, epos, &nepos.block, | |
800552ce | 2013 | sb->s_blocksize | EXT_NEXT_EXTENT_ALLOCDESCS, 0); |
fcea62ba JK |
2014 | } |
2015 | ||
2016 | brelse(epos->bh); | |
2017 | *epos = nepos; | |
2018 | ||
2019 | return 0; | |
2020 | } | |
2021 | ||
2022 | /* | |
2023 | * Append extent at the given position - should be the first free one in inode | |
2024 | * / indirect extent. This function assumes there is enough space in the inode | |
2025 | * or indirect extent. Use udf_add_aext() if you didn't check for this before. | |
2026 | */ | |
2027 | int __udf_add_aext(struct inode *inode, struct extent_position *epos, | |
2028 | struct kernel_lb_addr *eloc, uint32_t elen, int inc) | |
2029 | { | |
2030 | struct udf_inode_info *iinfo = UDF_I(inode); | |
2031 | struct allocExtDesc *aed; | |
2032 | int adsize; | |
1da177e4 | 2033 | |
48d6d8ff | 2034 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
5ca4e4be | 2035 | adsize = sizeof(struct short_ad); |
48d6d8ff | 2036 | else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
5ca4e4be | 2037 | adsize = sizeof(struct long_ad); |
1da177e4 | 2038 | else |
7e49b6f2 | 2039 | return -EIO; |
1da177e4 | 2040 | |
fcea62ba JK |
2041 | if (!epos->bh) { |
2042 | WARN_ON(iinfo->i_lenAlloc != | |
2043 | epos->offset - udf_file_entry_alloc_offset(inode)); | |
2044 | } else { | |
2045 | aed = (struct allocExtDesc *)epos->bh->b_data; | |
2046 | WARN_ON(le32_to_cpu(aed->lengthAllocDescs) != | |
2047 | epos->offset - sizeof(struct allocExtDesc)); | |
2048 | WARN_ON(epos->offset + adsize > inode->i_sb->s_blocksize); | |
1da177e4 LT |
2049 | } |
2050 | ||
7e49b6f2 | 2051 | udf_write_aext(inode, epos, eloc, elen, inc); |
1da177e4 | 2052 | |
cb00ea35 | 2053 | if (!epos->bh) { |
48d6d8ff | 2054 | iinfo->i_lenAlloc += adsize; |
1da177e4 | 2055 | mark_inode_dirty(inode); |
cb00ea35 | 2056 | } else { |
ff116fc8 | 2057 | aed = (struct allocExtDesc *)epos->bh->b_data; |
c2104fda | 2058 | le32_add_cpu(&aed->lengthAllocDescs, adsize); |
4b11111a MS |
2059 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
2060 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) | |
2061 | udf_update_tag(epos->bh->b_data, | |
2062 | epos->offset + (inc ? 0 : adsize)); | |
1da177e4 | 2063 | else |
4b11111a MS |
2064 | udf_update_tag(epos->bh->b_data, |
2065 | sizeof(struct allocExtDesc)); | |
ff116fc8 | 2066 | mark_buffer_dirty_inode(epos->bh, inode); |
1da177e4 LT |
2067 | } |
2068 | ||
7e49b6f2 | 2069 | return 0; |
1da177e4 LT |
2070 | } |
2071 | ||
fcea62ba JK |
2072 | /* |
2073 | * Append extent at given position - should be the first free one in inode | |
2074 | * / indirect extent. Takes care of allocating and linking indirect blocks. | |
2075 | */ | |
2076 | int udf_add_aext(struct inode *inode, struct extent_position *epos, | |
2077 | struct kernel_lb_addr *eloc, uint32_t elen, int inc) | |
2078 | { | |
2079 | int adsize; | |
2080 | struct super_block *sb = inode->i_sb; | |
2081 | ||
2082 | if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_SHORT) | |
2083 | adsize = sizeof(struct short_ad); | |
2084 | else if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_LONG) | |
2085 | adsize = sizeof(struct long_ad); | |
2086 | else | |
2087 | return -EIO; | |
2088 | ||
2089 | if (epos->offset + (2 * adsize) > sb->s_blocksize) { | |
2090 | int err; | |
b490bdd6 | 2091 | udf_pblk_t new_block; |
fcea62ba JK |
2092 | |
2093 | new_block = udf_new_block(sb, NULL, | |
2094 | epos->block.partitionReferenceNum, | |
2095 | epos->block.logicalBlockNum, &err); | |
2096 | if (!new_block) | |
2097 | return -ENOSPC; | |
2098 | ||
2099 | err = udf_setup_indirect_aext(inode, new_block, epos); | |
2100 | if (err) | |
2101 | return err; | |
2102 | } | |
2103 | ||
2104 | return __udf_add_aext(inode, epos, eloc, elen, inc); | |
2105 | } | |
2106 | ||
7e49b6f2 JK |
2107 | void udf_write_aext(struct inode *inode, struct extent_position *epos, |
2108 | struct kernel_lb_addr *eloc, uint32_t elen, int inc) | |
1da177e4 LT |
2109 | { |
2110 | int adsize; | |
2111 | uint8_t *ptr; | |
5ca4e4be PE |
2112 | struct short_ad *sad; |
2113 | struct long_ad *lad; | |
48d6d8ff | 2114 | struct udf_inode_info *iinfo = UDF_I(inode); |
1da177e4 | 2115 | |
ff116fc8 | 2116 | if (!epos->bh) |
382a2287 | 2117 | ptr = iinfo->i_data + epos->offset - |
4b11111a | 2118 | udf_file_entry_alloc_offset(inode) + |
48d6d8ff | 2119 | iinfo->i_lenEAttr; |
1da177e4 | 2120 | else |
ff116fc8 | 2121 | ptr = epos->bh->b_data + epos->offset; |
1da177e4 | 2122 | |
48d6d8ff | 2123 | switch (iinfo->i_alloc_type) { |
cb00ea35 | 2124 | case ICBTAG_FLAG_AD_SHORT: |
5ca4e4be | 2125 | sad = (struct short_ad *)ptr; |
28de7948 | 2126 | sad->extLength = cpu_to_le32(elen); |
97e961fd | 2127 | sad->extPosition = cpu_to_le32(eloc->logicalBlockNum); |
5ca4e4be | 2128 | adsize = sizeof(struct short_ad); |
28de7948 | 2129 | break; |
cb00ea35 | 2130 | case ICBTAG_FLAG_AD_LONG: |
5ca4e4be | 2131 | lad = (struct long_ad *)ptr; |
28de7948 | 2132 | lad->extLength = cpu_to_le32(elen); |
97e961fd | 2133 | lad->extLocation = cpu_to_lelb(*eloc); |
28de7948 | 2134 | memset(lad->impUse, 0x00, sizeof(lad->impUse)); |
5ca4e4be | 2135 | adsize = sizeof(struct long_ad); |
28de7948 | 2136 | break; |
cb00ea35 | 2137 | default: |
7e49b6f2 | 2138 | return; |
1da177e4 LT |
2139 | } |
2140 | ||
cb00ea35 | 2141 | if (epos->bh) { |
28de7948 | 2142 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
6c79e987 | 2143 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) { |
4b11111a MS |
2144 | struct allocExtDesc *aed = |
2145 | (struct allocExtDesc *)epos->bh->b_data; | |
ff116fc8 | 2146 | udf_update_tag(epos->bh->b_data, |
4b11111a MS |
2147 | le32_to_cpu(aed->lengthAllocDescs) + |
2148 | sizeof(struct allocExtDesc)); | |
1da177e4 | 2149 | } |
ff116fc8 | 2150 | mark_buffer_dirty_inode(epos->bh, inode); |
28de7948 | 2151 | } else { |
1da177e4 | 2152 | mark_inode_dirty(inode); |
28de7948 | 2153 | } |
1da177e4 LT |
2154 | |
2155 | if (inc) | |
ff116fc8 | 2156 | epos->offset += adsize; |
1da177e4 LT |
2157 | } |
2158 | ||
b0918d9f VN |
2159 | /* |
2160 | * Only 1 indirect extent in a row really makes sense but allow upto 16 in case | |
2161 | * someone does some weird stuff. | |
2162 | */ | |
2163 | #define UDF_MAX_INDIR_EXTS 16 | |
2164 | ||
4b11111a | 2165 | int8_t udf_next_aext(struct inode *inode, struct extent_position *epos, |
5ca4e4be | 2166 | struct kernel_lb_addr *eloc, uint32_t *elen, int inc) |
1da177e4 LT |
2167 | { |
2168 | int8_t etype; | |
b0918d9f | 2169 | unsigned int indirections = 0; |
1da177e4 | 2170 | |
ff116fc8 | 2171 | while ((etype = udf_current_aext(inode, epos, eloc, elen, inc)) == |
800552ce | 2172 | (EXT_NEXT_EXTENT_ALLOCDESCS >> 30)) { |
b490bdd6 | 2173 | udf_pblk_t block; |
b0918d9f VN |
2174 | |
2175 | if (++indirections > UDF_MAX_INDIR_EXTS) { | |
2176 | udf_err(inode->i_sb, | |
2177 | "too many indirect extents in inode %lu\n", | |
2178 | inode->i_ino); | |
2179 | return -1; | |
2180 | } | |
2181 | ||
ff116fc8 JK |
2182 | epos->block = *eloc; |
2183 | epos->offset = sizeof(struct allocExtDesc); | |
3bf25cb4 | 2184 | brelse(epos->bh); |
97e961fd | 2185 | block = udf_get_lb_pblock(inode->i_sb, &epos->block, 0); |
101ee137 | 2186 | epos->bh = sb_bread(inode->i_sb, block); |
4b11111a | 2187 | if (!epos->bh) { |
fcbf7637 | 2188 | udf_debug("reading block %u failed!\n", block); |
1da177e4 LT |
2189 | return -1; |
2190 | } | |
2191 | } | |
2192 | ||
2193 | return etype; | |
2194 | } | |
2195 | ||
4b11111a | 2196 | int8_t udf_current_aext(struct inode *inode, struct extent_position *epos, |
5ca4e4be | 2197 | struct kernel_lb_addr *eloc, uint32_t *elen, int inc) |
1da177e4 LT |
2198 | { |
2199 | int alen; | |
2200 | int8_t etype; | |
2201 | uint8_t *ptr; | |
5ca4e4be PE |
2202 | struct short_ad *sad; |
2203 | struct long_ad *lad; | |
48d6d8ff | 2204 | struct udf_inode_info *iinfo = UDF_I(inode); |
28de7948 | 2205 | |
cb00ea35 | 2206 | if (!epos->bh) { |
ff116fc8 JK |
2207 | if (!epos->offset) |
2208 | epos->offset = udf_file_entry_alloc_offset(inode); | |
382a2287 | 2209 | ptr = iinfo->i_data + epos->offset - |
4b11111a | 2210 | udf_file_entry_alloc_offset(inode) + |
48d6d8ff | 2211 | iinfo->i_lenEAttr; |
4b11111a | 2212 | alen = udf_file_entry_alloc_offset(inode) + |
48d6d8ff | 2213 | iinfo->i_lenAlloc; |
cb00ea35 | 2214 | } else { |
ff116fc8 JK |
2215 | if (!epos->offset) |
2216 | epos->offset = sizeof(struct allocExtDesc); | |
2217 | ptr = epos->bh->b_data + epos->offset; | |
28de7948 | 2218 | alen = sizeof(struct allocExtDesc) + |
4b11111a MS |
2219 | le32_to_cpu(((struct allocExtDesc *)epos->bh->b_data)-> |
2220 | lengthAllocDescs); | |
1da177e4 LT |
2221 | } |
2222 | ||
48d6d8ff | 2223 | switch (iinfo->i_alloc_type) { |
cb00ea35 | 2224 | case ICBTAG_FLAG_AD_SHORT: |
4b11111a MS |
2225 | sad = udf_get_fileshortad(ptr, alen, &epos->offset, inc); |
2226 | if (!sad) | |
28de7948 CG |
2227 | return -1; |
2228 | etype = le32_to_cpu(sad->extLength) >> 30; | |
2229 | eloc->logicalBlockNum = le32_to_cpu(sad->extPosition); | |
4b11111a | 2230 | eloc->partitionReferenceNum = |
48d6d8ff | 2231 | iinfo->i_location.partitionReferenceNum; |
28de7948 CG |
2232 | *elen = le32_to_cpu(sad->extLength) & UDF_EXTENT_LENGTH_MASK; |
2233 | break; | |
cb00ea35 | 2234 | case ICBTAG_FLAG_AD_LONG: |
4b11111a MS |
2235 | lad = udf_get_filelongad(ptr, alen, &epos->offset, inc); |
2236 | if (!lad) | |
1da177e4 | 2237 | return -1; |
28de7948 CG |
2238 | etype = le32_to_cpu(lad->extLength) >> 30; |
2239 | *eloc = lelb_to_cpu(lad->extLocation); | |
2240 | *elen = le32_to_cpu(lad->extLength) & UDF_EXTENT_LENGTH_MASK; | |
2241 | break; | |
2242 | default: | |
fcbf7637 | 2243 | udf_debug("alloc_type = %u unsupported\n", iinfo->i_alloc_type); |
28de7948 | 2244 | return -1; |
1da177e4 LT |
2245 | } |
2246 | ||
2247 | return etype; | |
2248 | } | |
2249 | ||
19fd80de JK |
2250 | static int udf_insert_aext(struct inode *inode, struct extent_position epos, |
2251 | struct kernel_lb_addr neloc, uint32_t nelen) | |
1da177e4 | 2252 | { |
5ca4e4be | 2253 | struct kernel_lb_addr oeloc; |
1da177e4 LT |
2254 | uint32_t oelen; |
2255 | int8_t etype; | |
19fd80de | 2256 | int err; |
1da177e4 | 2257 | |
ff116fc8 | 2258 | if (epos.bh) |
3bf25cb4 | 2259 | get_bh(epos.bh); |
1da177e4 | 2260 | |
cb00ea35 | 2261 | while ((etype = udf_next_aext(inode, &epos, &oeloc, &oelen, 0)) != -1) { |
97e961fd | 2262 | udf_write_aext(inode, &epos, &neloc, nelen, 1); |
1da177e4 LT |
2263 | neloc = oeloc; |
2264 | nelen = (etype << 30) | oelen; | |
2265 | } | |
19fd80de | 2266 | err = udf_add_aext(inode, &epos, &neloc, nelen, 1); |
3bf25cb4 | 2267 | brelse(epos.bh); |
28de7948 | 2268 | |
19fd80de | 2269 | return err; |
1da177e4 LT |
2270 | } |
2271 | ||
6c1e4d06 | 2272 | int8_t udf_delete_aext(struct inode *inode, struct extent_position epos) |
1da177e4 | 2273 | { |
ff116fc8 JK |
2274 | struct extent_position oepos; |
2275 | int adsize; | |
1da177e4 LT |
2276 | int8_t etype; |
2277 | struct allocExtDesc *aed; | |
48d6d8ff | 2278 | struct udf_inode_info *iinfo; |
6c1e4d06 JK |
2279 | struct kernel_lb_addr eloc; |
2280 | uint32_t elen; | |
1da177e4 | 2281 | |
cb00ea35 | 2282 | if (epos.bh) { |
3bf25cb4 JK |
2283 | get_bh(epos.bh); |
2284 | get_bh(epos.bh); | |
1da177e4 LT |
2285 | } |
2286 | ||
48d6d8ff MS |
2287 | iinfo = UDF_I(inode); |
2288 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) | |
5ca4e4be | 2289 | adsize = sizeof(struct short_ad); |
48d6d8ff | 2290 | else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
5ca4e4be | 2291 | adsize = sizeof(struct long_ad); |
1da177e4 LT |
2292 | else |
2293 | adsize = 0; | |
2294 | ||
ff116fc8 JK |
2295 | oepos = epos; |
2296 | if (udf_next_aext(inode, &epos, &eloc, &elen, 1) == -1) | |
1da177e4 LT |
2297 | return -1; |
2298 | ||
cb00ea35 | 2299 | while ((etype = udf_next_aext(inode, &epos, &eloc, &elen, 1)) != -1) { |
97e961fd | 2300 | udf_write_aext(inode, &oepos, &eloc, (etype << 30) | elen, 1); |
cb00ea35 | 2301 | if (oepos.bh != epos.bh) { |
ff116fc8 | 2302 | oepos.block = epos.block; |
3bf25cb4 JK |
2303 | brelse(oepos.bh); |
2304 | get_bh(epos.bh); | |
ff116fc8 JK |
2305 | oepos.bh = epos.bh; |
2306 | oepos.offset = epos.offset - adsize; | |
1da177e4 LT |
2307 | } |
2308 | } | |
5ca4e4be | 2309 | memset(&eloc, 0x00, sizeof(struct kernel_lb_addr)); |
1da177e4 LT |
2310 | elen = 0; |
2311 | ||
cb00ea35 | 2312 | if (epos.bh != oepos.bh) { |
97e961fd PE |
2313 | udf_free_blocks(inode->i_sb, inode, &epos.block, 0, 1); |
2314 | udf_write_aext(inode, &oepos, &eloc, elen, 1); | |
2315 | udf_write_aext(inode, &oepos, &eloc, elen, 1); | |
cb00ea35 | 2316 | if (!oepos.bh) { |
48d6d8ff | 2317 | iinfo->i_lenAlloc -= (adsize * 2); |
1da177e4 | 2318 | mark_inode_dirty(inode); |
cb00ea35 | 2319 | } else { |
ff116fc8 | 2320 | aed = (struct allocExtDesc *)oepos.bh->b_data; |
c2104fda | 2321 | le32_add_cpu(&aed->lengthAllocDescs, -(2 * adsize)); |
28de7948 | 2322 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
6c79e987 | 2323 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) |
4b11111a MS |
2324 | udf_update_tag(oepos.bh->b_data, |
2325 | oepos.offset - (2 * adsize)); | |
1da177e4 | 2326 | else |
4b11111a MS |
2327 | udf_update_tag(oepos.bh->b_data, |
2328 | sizeof(struct allocExtDesc)); | |
ff116fc8 | 2329 | mark_buffer_dirty_inode(oepos.bh, inode); |
1da177e4 | 2330 | } |
cb00ea35 | 2331 | } else { |
97e961fd | 2332 | udf_write_aext(inode, &oepos, &eloc, elen, 1); |
cb00ea35 | 2333 | if (!oepos.bh) { |
48d6d8ff | 2334 | iinfo->i_lenAlloc -= adsize; |
1da177e4 | 2335 | mark_inode_dirty(inode); |
cb00ea35 | 2336 | } else { |
ff116fc8 | 2337 | aed = (struct allocExtDesc *)oepos.bh->b_data; |
c2104fda | 2338 | le32_add_cpu(&aed->lengthAllocDescs, -adsize); |
28de7948 | 2339 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
6c79e987 | 2340 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) |
4b11111a MS |
2341 | udf_update_tag(oepos.bh->b_data, |
2342 | epos.offset - adsize); | |
1da177e4 | 2343 | else |
4b11111a MS |
2344 | udf_update_tag(oepos.bh->b_data, |
2345 | sizeof(struct allocExtDesc)); | |
ff116fc8 | 2346 | mark_buffer_dirty_inode(oepos.bh, inode); |
1da177e4 LT |
2347 | } |
2348 | } | |
647bd61a | 2349 | |
3bf25cb4 JK |
2350 | brelse(epos.bh); |
2351 | brelse(oepos.bh); | |
28de7948 | 2352 | |
1da177e4 LT |
2353 | return (elen >> 30); |
2354 | } | |
2355 | ||
4b11111a | 2356 | int8_t inode_bmap(struct inode *inode, sector_t block, |
5ca4e4be | 2357 | struct extent_position *pos, struct kernel_lb_addr *eloc, |
4b11111a | 2358 | uint32_t *elen, sector_t *offset) |
1da177e4 | 2359 | { |
4b11111a | 2360 | unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; |
bbc9abd2 | 2361 | loff_t lbcount = 0, bcount = (loff_t) block << blocksize_bits; |
1da177e4 | 2362 | int8_t etype; |
48d6d8ff | 2363 | struct udf_inode_info *iinfo; |
1da177e4 | 2364 | |
48d6d8ff | 2365 | iinfo = UDF_I(inode); |
99600051 NJ |
2366 | if (!udf_read_extent_cache(inode, bcount, &lbcount, pos)) { |
2367 | pos->offset = 0; | |
2368 | pos->block = iinfo->i_location; | |
2369 | pos->bh = NULL; | |
2370 | } | |
1da177e4 | 2371 | *elen = 0; |
cb00ea35 | 2372 | do { |
4b11111a MS |
2373 | etype = udf_next_aext(inode, pos, eloc, elen, 1); |
2374 | if (etype == -1) { | |
2375 | *offset = (bcount - lbcount) >> blocksize_bits; | |
48d6d8ff | 2376 | iinfo->i_lenExtents = lbcount; |
1da177e4 LT |
2377 | return -1; |
2378 | } | |
2379 | lbcount += *elen; | |
2380 | } while (lbcount <= bcount); | |
99600051 | 2381 | /* update extent cache */ |
b31c9ed9 | 2382 | udf_update_extent_cache(inode, lbcount - *elen, pos); |
4b11111a | 2383 | *offset = (bcount + *elen - lbcount) >> blocksize_bits; |
1da177e4 LT |
2384 | |
2385 | return etype; | |
2386 | } |