Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * inode.c | |
3 | * | |
4 | * PURPOSE | |
5 | * Inode handling routines for the OSTA-UDF(tm) filesystem. | |
6 | * | |
1da177e4 LT |
7 | * COPYRIGHT |
8 | * This file is distributed under the terms of the GNU General Public | |
9 | * License (GPL). Copies of the GPL can be obtained from: | |
10 | * ftp://prep.ai.mit.edu/pub/gnu/GPL | |
11 | * Each contributing author retains all rights to their own work. | |
12 | * | |
13 | * (C) 1998 Dave Boynton | |
14 | * (C) 1998-2004 Ben Fennema | |
15 | * (C) 1999-2000 Stelias Computing Inc | |
16 | * | |
17 | * HISTORY | |
18 | * | |
19 | * 10/04/98 dgb Added rudimentary directory functions | |
20 | * 10/07/98 Fully working udf_block_map! It works! | |
21 | * 11/25/98 bmap altered to better support extents | |
4b11111a MS |
22 | * 12/06/98 blf partition support in udf_iget, udf_block_map |
23 | * and udf_read_inode | |
1da177e4 LT |
24 | * 12/12/98 rewrote udf_block_map to handle next extents and descs across |
25 | * block boundaries (which is not actually allowed) | |
26 | * 12/20/98 added support for strategy 4096 | |
27 | * 03/07/99 rewrote udf_block_map (again) | |
28 | * New funcs, inode_bmap, udf_next_aext | |
29 | * 04/19/99 Support for writing device EA's for major/minor # | |
30 | */ | |
31 | ||
32 | #include "udfdecl.h" | |
33 | #include <linux/mm.h> | |
1da177e4 LT |
34 | #include <linux/module.h> |
35 | #include <linux/pagemap.h> | |
1da177e4 LT |
36 | #include <linux/writeback.h> |
37 | #include <linux/slab.h> | |
f845fced | 38 | #include <linux/crc-itu-t.h> |
bc112323 | 39 | #include <linux/mpage.h> |
e2e40f2c | 40 | #include <linux/uio.h> |
2f8b5444 | 41 | #include <linux/bio.h> |
1da177e4 LT |
42 | |
43 | #include "udf_i.h" | |
44 | #include "udf_sb.h" | |
45 | ||
1da177e4 LT |
46 | #define EXTENT_MERGE_SIZE 5 |
47 | ||
c3367a1b SM |
48 | #define FE_MAPPED_PERMS (FE_PERM_U_READ | FE_PERM_U_WRITE | FE_PERM_U_EXEC | \ |
49 | FE_PERM_G_READ | FE_PERM_G_WRITE | FE_PERM_G_EXEC | \ | |
50 | FE_PERM_O_READ | FE_PERM_O_WRITE | FE_PERM_O_EXEC) | |
51 | ||
52 | #define FE_DELETE_PERMS (FE_PERM_U_DELETE | FE_PERM_G_DELETE | \ | |
53 | FE_PERM_O_DELETE) | |
54 | ||
faa17292 | 55 | static umode_t udf_convert_permissions(struct fileEntry *); |
1da177e4 | 56 | static int udf_update_inode(struct inode *, int); |
49521de1 | 57 | static int udf_sync_inode(struct inode *inode); |
647bd61a | 58 | static int udf_alloc_i_data(struct inode *inode, size_t size); |
7b0b0933 | 59 | static sector_t inode_getblk(struct inode *, sector_t, int *, int *); |
ff116fc8 | 60 | static int8_t udf_insert_aext(struct inode *, struct extent_position, |
5ca4e4be | 61 | struct kernel_lb_addr, uint32_t); |
b490bdd6 | 62 | static void udf_split_extents(struct inode *, int *, int, udf_pblk_t, |
3cc6f844 | 63 | struct kernel_long_ad *, int *); |
1da177e4 | 64 | static void udf_prealloc_extents(struct inode *, int, int, |
3cc6f844 FF |
65 | struct kernel_long_ad *, int *); |
66 | static void udf_merge_extents(struct inode *, struct kernel_long_ad *, int *); | |
67 | static void udf_update_extents(struct inode *, struct kernel_long_ad *, int, | |
68 | int, struct extent_position *); | |
1da177e4 LT |
69 | static int udf_get_block(struct inode *, sector_t, struct buffer_head *, int); |
70 | ||
99600051 NJ |
71 | static void __udf_clear_extent_cache(struct inode *inode) |
72 | { | |
73 | struct udf_inode_info *iinfo = UDF_I(inode); | |
74 | ||
75 | if (iinfo->cached_extent.lstart != -1) { | |
76 | brelse(iinfo->cached_extent.epos.bh); | |
77 | iinfo->cached_extent.lstart = -1; | |
78 | } | |
79 | } | |
80 | ||
81 | /* Invalidate extent cache */ | |
82 | static void udf_clear_extent_cache(struct inode *inode) | |
83 | { | |
84 | struct udf_inode_info *iinfo = UDF_I(inode); | |
85 | ||
86 | spin_lock(&iinfo->i_extent_cache_lock); | |
87 | __udf_clear_extent_cache(inode); | |
88 | spin_unlock(&iinfo->i_extent_cache_lock); | |
89 | } | |
90 | ||
91 | /* Return contents of extent cache */ | |
92 | static int udf_read_extent_cache(struct inode *inode, loff_t bcount, | |
93 | loff_t *lbcount, struct extent_position *pos) | |
94 | { | |
95 | struct udf_inode_info *iinfo = UDF_I(inode); | |
96 | int ret = 0; | |
97 | ||
98 | spin_lock(&iinfo->i_extent_cache_lock); | |
99 | if ((iinfo->cached_extent.lstart <= bcount) && | |
100 | (iinfo->cached_extent.lstart != -1)) { | |
101 | /* Cache hit */ | |
102 | *lbcount = iinfo->cached_extent.lstart; | |
103 | memcpy(pos, &iinfo->cached_extent.epos, | |
104 | sizeof(struct extent_position)); | |
105 | if (pos->bh) | |
106 | get_bh(pos->bh); | |
107 | ret = 1; | |
108 | } | |
109 | spin_unlock(&iinfo->i_extent_cache_lock); | |
110 | return ret; | |
111 | } | |
112 | ||
113 | /* Add extent to extent cache */ | |
114 | static void udf_update_extent_cache(struct inode *inode, loff_t estart, | |
b31c9ed9 | 115 | struct extent_position *pos) |
99600051 NJ |
116 | { |
117 | struct udf_inode_info *iinfo = UDF_I(inode); | |
118 | ||
119 | spin_lock(&iinfo->i_extent_cache_lock); | |
120 | /* Invalidate previously cached extent */ | |
121 | __udf_clear_extent_cache(inode); | |
122 | if (pos->bh) | |
123 | get_bh(pos->bh); | |
033c9da0 | 124 | memcpy(&iinfo->cached_extent.epos, pos, sizeof(*pos)); |
99600051 | 125 | iinfo->cached_extent.lstart = estart; |
b31c9ed9 FF |
126 | switch (iinfo->i_alloc_type) { |
127 | case ICBTAG_FLAG_AD_SHORT: | |
128 | iinfo->cached_extent.epos.offset -= sizeof(struct short_ad); | |
129 | break; | |
130 | case ICBTAG_FLAG_AD_LONG: | |
131 | iinfo->cached_extent.epos.offset -= sizeof(struct long_ad); | |
132 | break; | |
133 | } | |
99600051 NJ |
134 | spin_unlock(&iinfo->i_extent_cache_lock); |
135 | } | |
b1e32126 | 136 | |
3aac2b62 | 137 | void udf_evict_inode(struct inode *inode) |
1da177e4 | 138 | { |
2c948b3f | 139 | struct udf_inode_info *iinfo = UDF_I(inode); |
3aac2b62 AV |
140 | int want_delete = 0; |
141 | ||
044e2e26 JK |
142 | if (!is_bad_inode(inode)) { |
143 | if (!inode->i_nlink) { | |
144 | want_delete = 1; | |
145 | udf_setsize(inode, 0); | |
146 | udf_update_inode(inode, IS_SYNC(inode)); | |
147 | } | |
148 | if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB && | |
149 | inode->i_size != iinfo->i_lenExtents) { | |
150 | udf_warn(inode->i_sb, | |
151 | "Inode %lu (mode %o) has inode size %llu different from extent length %llu. Filesystem need not be standards compliant.\n", | |
152 | inode->i_ino, inode->i_mode, | |
153 | (unsigned long long)inode->i_size, | |
154 | (unsigned long long)iinfo->i_lenExtents); | |
155 | } | |
91b0abe3 JW |
156 | } |
157 | truncate_inode_pages_final(&inode->i_data); | |
3aac2b62 | 158 | invalidate_inode_buffers(inode); |
dbd5768f | 159 | clear_inode(inode); |
382a2287 JK |
160 | kfree(iinfo->i_data); |
161 | iinfo->i_data = NULL; | |
99600051 | 162 | udf_clear_extent_cache(inode); |
3aac2b62 | 163 | if (want_delete) { |
3aac2b62 | 164 | udf_free_inode(inode); |
3aac2b62 | 165 | } |
1da177e4 LT |
166 | } |
167 | ||
5eec54fc IA |
168 | static void udf_write_failed(struct address_space *mapping, loff_t to) |
169 | { | |
170 | struct inode *inode = mapping->host; | |
171 | struct udf_inode_info *iinfo = UDF_I(inode); | |
172 | loff_t isize = inode->i_size; | |
173 | ||
174 | if (to > isize) { | |
7caef267 | 175 | truncate_pagecache(inode, isize); |
5eec54fc IA |
176 | if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { |
177 | down_write(&iinfo->i_data_sem); | |
99600051 | 178 | udf_clear_extent_cache(inode); |
5eec54fc IA |
179 | udf_truncate_extents(inode); |
180 | up_write(&iinfo->i_data_sem); | |
181 | } | |
182 | } | |
183 | } | |
184 | ||
1da177e4 LT |
185 | static int udf_writepage(struct page *page, struct writeback_control *wbc) |
186 | { | |
187 | return block_write_full_page(page, udf_get_block, wbc); | |
188 | } | |
189 | ||
378b8e1a NJ |
190 | static int udf_writepages(struct address_space *mapping, |
191 | struct writeback_control *wbc) | |
192 | { | |
193 | return mpage_writepages(mapping, wbc, udf_get_block); | |
194 | } | |
195 | ||
f132ab7d | 196 | static int udf_read_folio(struct file *file, struct folio *folio) |
1da177e4 | 197 | { |
f132ab7d | 198 | return mpage_read_folio(folio, udf_get_block); |
bc112323 NJ |
199 | } |
200 | ||
d4388340 | 201 | static void udf_readahead(struct readahead_control *rac) |
bc112323 | 202 | { |
d4388340 | 203 | mpage_readahead(rac, udf_get_block); |
1da177e4 LT |
204 | } |
205 | ||
be021ee4 | 206 | static int udf_write_begin(struct file *file, struct address_space *mapping, |
9d6b0cd7 | 207 | loff_t pos, unsigned len, |
be021ee4 | 208 | struct page **pagep, void **fsdata) |
1da177e4 | 209 | { |
155130a4 CH |
210 | int ret; |
211 | ||
b3992d1e | 212 | ret = block_write_begin(mapping, pos, len, pagep, udf_get_block); |
5eec54fc IA |
213 | if (unlikely(ret)) |
214 | udf_write_failed(mapping, pos + len); | |
215 | return ret; | |
216 | } | |
155130a4 | 217 | |
c8b8e32d | 218 | static ssize_t udf_direct_IO(struct kiocb *iocb, struct iov_iter *iter) |
5eec54fc IA |
219 | { |
220 | struct file *file = iocb->ki_filp; | |
221 | struct address_space *mapping = file->f_mapping; | |
222 | struct inode *inode = mapping->host; | |
a6cbcd4a | 223 | size_t count = iov_iter_count(iter); |
5eec54fc IA |
224 | ssize_t ret; |
225 | ||
c8b8e32d | 226 | ret = blockdev_direct_IO(iocb, inode, iter, udf_get_block); |
6f673763 | 227 | if (unlikely(ret < 0 && iov_iter_rw(iter) == WRITE)) |
c8b8e32d | 228 | udf_write_failed(mapping, iocb->ki_pos + count); |
155130a4 | 229 | return ret; |
1da177e4 LT |
230 | } |
231 | ||
232 | static sector_t udf_bmap(struct address_space *mapping, sector_t block) | |
233 | { | |
cb00ea35 | 234 | return generic_block_bmap(mapping, block, udf_get_block); |
1da177e4 LT |
235 | } |
236 | ||
f5e54d6e | 237 | const struct address_space_operations udf_aops = { |
e621900a | 238 | .dirty_folio = block_dirty_folio, |
7ba13abb | 239 | .invalidate_folio = block_invalidate_folio, |
f132ab7d | 240 | .read_folio = udf_read_folio, |
d4388340 | 241 | .readahead = udf_readahead, |
28de7948 | 242 | .writepage = udf_writepage, |
378b8e1a | 243 | .writepages = udf_writepages, |
5eec54fc IA |
244 | .write_begin = udf_write_begin, |
245 | .write_end = generic_write_end, | |
246 | .direct_IO = udf_direct_IO, | |
28de7948 | 247 | .bmap = udf_bmap, |
1da177e4 LT |
248 | }; |
249 | ||
d2eb8c35 JK |
250 | /* |
251 | * Expand file stored in ICB to a normal one-block-file | |
252 | * | |
253 | * This function requires i_data_sem for writing and releases it. | |
254 | * This function requires i_mutex held | |
255 | */ | |
7e49b6f2 | 256 | int udf_expand_file_adinicb(struct inode *inode) |
1da177e4 LT |
257 | { |
258 | struct page *page; | |
259 | char *kaddr; | |
48d6d8ff | 260 | struct udf_inode_info *iinfo = UDF_I(inode); |
7e49b6f2 | 261 | int err; |
1da177e4 | 262 | |
5955102c | 263 | WARN_ON_ONCE(!inode_is_locked(inode)); |
48d6d8ff | 264 | if (!iinfo->i_lenAlloc) { |
1da177e4 | 265 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) |
48d6d8ff | 266 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT; |
1da177e4 | 267 | else |
48d6d8ff | 268 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG; |
7e49b6f2 JK |
269 | /* from now on we have normal address_space methods */ |
270 | inode->i_data.a_ops = &udf_aops; | |
d2eb8c35 | 271 | up_write(&iinfo->i_data_sem); |
1da177e4 | 272 | mark_inode_dirty(inode); |
7e49b6f2 | 273 | return 0; |
1da177e4 | 274 | } |
d2eb8c35 JK |
275 | /* |
276 | * Release i_data_sem so that we can lock a page - page lock ranks | |
277 | * above i_data_sem. i_mutex still protects us against file changes. | |
278 | */ | |
279 | up_write(&iinfo->i_data_sem); | |
1da177e4 | 280 | |
7e49b6f2 JK |
281 | page = find_or_create_page(inode->i_mapping, 0, GFP_NOFS); |
282 | if (!page) | |
283 | return -ENOMEM; | |
cd7619d6 | 284 | |
cb00ea35 | 285 | if (!PageUptodate(page)) { |
5c26eac4 | 286 | kaddr = kmap_atomic(page); |
48d6d8ff | 287 | memset(kaddr + iinfo->i_lenAlloc, 0x00, |
09cbfeaf | 288 | PAGE_SIZE - iinfo->i_lenAlloc); |
382a2287 | 289 | memcpy(kaddr, iinfo->i_data + iinfo->i_lenEAttr, |
48d6d8ff | 290 | iinfo->i_lenAlloc); |
1da177e4 LT |
291 | flush_dcache_page(page); |
292 | SetPageUptodate(page); | |
5c26eac4 | 293 | kunmap_atomic(kaddr); |
1da177e4 | 294 | } |
d2eb8c35 | 295 | down_write(&iinfo->i_data_sem); |
382a2287 | 296 | memset(iinfo->i_data + iinfo->i_lenEAttr, 0x00, |
48d6d8ff MS |
297 | iinfo->i_lenAlloc); |
298 | iinfo->i_lenAlloc = 0; | |
1da177e4 | 299 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) |
48d6d8ff | 300 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT; |
1da177e4 | 301 | else |
48d6d8ff | 302 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG; |
7e49b6f2 JK |
303 | /* from now on we have normal address_space methods */ |
304 | inode->i_data.a_ops = &udf_aops; | |
7fc3b7c2 JK |
305 | set_page_dirty(page); |
306 | unlock_page(page); | |
d2eb8c35 | 307 | up_write(&iinfo->i_data_sem); |
7fc3b7c2 | 308 | err = filemap_fdatawrite(inode->i_mapping); |
7e49b6f2 JK |
309 | if (err) { |
310 | /* Restore everything back so that we don't lose data... */ | |
311 | lock_page(page); | |
d2eb8c35 | 312 | down_write(&iinfo->i_data_sem); |
5c26eac4 | 313 | kaddr = kmap_atomic(page); |
382a2287 | 314 | memcpy(iinfo->i_data + iinfo->i_lenEAttr, kaddr, inode->i_size); |
5c26eac4 | 315 | kunmap_atomic(kaddr); |
7e49b6f2 JK |
316 | unlock_page(page); |
317 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB; | |
318 | inode->i_data.a_ops = &udf_adinicb_aops; | |
ea856919 | 319 | iinfo->i_lenAlloc = inode->i_size; |
d2eb8c35 | 320 | up_write(&iinfo->i_data_sem); |
7e49b6f2 | 321 | } |
09cbfeaf | 322 | put_page(page); |
1da177e4 | 323 | mark_inode_dirty(inode); |
7e49b6f2 JK |
324 | |
325 | return err; | |
1da177e4 LT |
326 | } |
327 | ||
b490bdd6 SM |
328 | struct buffer_head *udf_expand_dir_adinicb(struct inode *inode, |
329 | udf_pblk_t *block, int *err) | |
1da177e4 | 330 | { |
b490bdd6 | 331 | udf_pblk_t newblock; |
ff116fc8 | 332 | struct buffer_head *dbh = NULL; |
5ca4e4be | 333 | struct kernel_lb_addr eloc; |
1da177e4 | 334 | uint8_t alloctype; |
ff116fc8 | 335 | struct extent_position epos; |
1da177e4 LT |
336 | |
337 | struct udf_fileident_bh sfibh, dfibh; | |
af793295 JK |
338 | loff_t f_pos = udf_ext0_offset(inode); |
339 | int size = udf_ext0_offset(inode) + inode->i_size; | |
1da177e4 | 340 | struct fileIdentDesc cfi, *sfi, *dfi; |
48d6d8ff | 341 | struct udf_inode_info *iinfo = UDF_I(inode); |
1da177e4 LT |
342 | |
343 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) | |
344 | alloctype = ICBTAG_FLAG_AD_SHORT; | |
345 | else | |
346 | alloctype = ICBTAG_FLAG_AD_LONG; | |
347 | ||
cb00ea35 | 348 | if (!inode->i_size) { |
48d6d8ff | 349 | iinfo->i_alloc_type = alloctype; |
1da177e4 LT |
350 | mark_inode_dirty(inode); |
351 | return NULL; | |
352 | } | |
353 | ||
354 | /* alloc block, and copy data to it */ | |
355 | *block = udf_new_block(inode->i_sb, inode, | |
48d6d8ff MS |
356 | iinfo->i_location.partitionReferenceNum, |
357 | iinfo->i_location.logicalBlockNum, err); | |
1da177e4 LT |
358 | if (!(*block)) |
359 | return NULL; | |
360 | newblock = udf_get_pblock(inode->i_sb, *block, | |
48d6d8ff | 361 | iinfo->i_location.partitionReferenceNum, |
c0b34438 | 362 | 0); |
1da177e4 LT |
363 | if (!newblock) |
364 | return NULL; | |
365 | dbh = udf_tgetblk(inode->i_sb, newblock); | |
366 | if (!dbh) | |
367 | return NULL; | |
368 | lock_buffer(dbh); | |
369 | memset(dbh->b_data, 0x00, inode->i_sb->s_blocksize); | |
370 | set_buffer_uptodate(dbh); | |
371 | unlock_buffer(dbh); | |
372 | mark_buffer_dirty_inode(dbh, inode); | |
373 | ||
4b11111a | 374 | sfibh.soffset = sfibh.eoffset = |
af793295 | 375 | f_pos & (inode->i_sb->s_blocksize - 1); |
ff116fc8 | 376 | sfibh.sbh = sfibh.ebh = NULL; |
1da177e4 LT |
377 | dfibh.soffset = dfibh.eoffset = 0; |
378 | dfibh.sbh = dfibh.ebh = dbh; | |
af793295 | 379 | while (f_pos < size) { |
48d6d8ff | 380 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB; |
4b11111a MS |
381 | sfi = udf_fileident_read(inode, &f_pos, &sfibh, &cfi, NULL, |
382 | NULL, NULL, NULL); | |
cb00ea35 | 383 | if (!sfi) { |
3bf25cb4 | 384 | brelse(dbh); |
1da177e4 LT |
385 | return NULL; |
386 | } | |
48d6d8ff | 387 | iinfo->i_alloc_type = alloctype; |
1da177e4 LT |
388 | sfi->descTag.tagLocation = cpu_to_le32(*block); |
389 | dfibh.soffset = dfibh.eoffset; | |
390 | dfibh.eoffset += (sfibh.eoffset - sfibh.soffset); | |
391 | dfi = (struct fileIdentDesc *)(dbh->b_data + dfibh.soffset); | |
392 | if (udf_write_fi(inode, sfi, dfi, &dfibh, sfi->impUse, | |
979a6e28 | 393 | udf_get_fi_ident(sfi))) { |
48d6d8ff | 394 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB; |
3bf25cb4 | 395 | brelse(dbh); |
1da177e4 LT |
396 | return NULL; |
397 | } | |
398 | } | |
399 | mark_buffer_dirty_inode(dbh, inode); | |
400 | ||
382a2287 | 401 | memset(iinfo->i_data + iinfo->i_lenEAttr, 0, iinfo->i_lenAlloc); |
48d6d8ff | 402 | iinfo->i_lenAlloc = 0; |
1da177e4 | 403 | eloc.logicalBlockNum = *block; |
4b11111a | 404 | eloc.partitionReferenceNum = |
48d6d8ff | 405 | iinfo->i_location.partitionReferenceNum; |
2c948b3f | 406 | iinfo->i_lenExtents = inode->i_size; |
ff116fc8 | 407 | epos.bh = NULL; |
48d6d8ff | 408 | epos.block = iinfo->i_location; |
ff116fc8 | 409 | epos.offset = udf_file_entry_alloc_offset(inode); |
2c948b3f | 410 | udf_add_aext(inode, &epos, &eloc, inode->i_size, 0); |
1da177e4 LT |
411 | /* UniqueID stuff */ |
412 | ||
3bf25cb4 | 413 | brelse(epos.bh); |
1da177e4 LT |
414 | mark_inode_dirty(inode); |
415 | return dbh; | |
416 | } | |
417 | ||
cb00ea35 CG |
418 | static int udf_get_block(struct inode *inode, sector_t block, |
419 | struct buffer_head *bh_result, int create) | |
1da177e4 LT |
420 | { |
421 | int err, new; | |
1ed16171 | 422 | sector_t phys = 0; |
48d6d8ff | 423 | struct udf_inode_info *iinfo; |
1da177e4 | 424 | |
cb00ea35 | 425 | if (!create) { |
1da177e4 LT |
426 | phys = udf_block_map(inode, block); |
427 | if (phys) | |
428 | map_bh(bh_result, inode->i_sb, phys); | |
429 | return 0; | |
430 | } | |
431 | ||
432 | err = -EIO; | |
433 | new = 0; | |
48d6d8ff | 434 | iinfo = UDF_I(inode); |
4d0fb621 AIB |
435 | |
436 | down_write(&iinfo->i_data_sem); | |
48d6d8ff MS |
437 | if (block == iinfo->i_next_alloc_block + 1) { |
438 | iinfo->i_next_alloc_block++; | |
439 | iinfo->i_next_alloc_goal++; | |
1da177e4 LT |
440 | } |
441 | ||
99600051 | 442 | udf_clear_extent_cache(inode); |
7b0b0933 JK |
443 | phys = inode_getblk(inode, block, &err, &new); |
444 | if (!phys) | |
1da177e4 | 445 | goto abort; |
1da177e4 LT |
446 | |
447 | if (new) | |
448 | set_buffer_new(bh_result); | |
449 | map_bh(bh_result, inode->i_sb, phys); | |
28de7948 CG |
450 | |
451 | abort: | |
4d0fb621 | 452 | up_write(&iinfo->i_data_sem); |
1da177e4 | 453 | return err; |
1da177e4 LT |
454 | } |
455 | ||
b490bdd6 | 456 | static struct buffer_head *udf_getblk(struct inode *inode, udf_pblk_t block, |
cb00ea35 | 457 | int create, int *err) |
1da177e4 | 458 | { |
28de7948 | 459 | struct buffer_head *bh; |
1da177e4 LT |
460 | struct buffer_head dummy; |
461 | ||
462 | dummy.b_state = 0; | |
463 | dummy.b_blocknr = -1000; | |
464 | *err = udf_get_block(inode, block, &dummy, create); | |
cb00ea35 | 465 | if (!*err && buffer_mapped(&dummy)) { |
1da177e4 | 466 | bh = sb_getblk(inode->i_sb, dummy.b_blocknr); |
cb00ea35 | 467 | if (buffer_new(&dummy)) { |
1da177e4 LT |
468 | lock_buffer(bh); |
469 | memset(bh->b_data, 0x00, inode->i_sb->s_blocksize); | |
470 | set_buffer_uptodate(bh); | |
471 | unlock_buffer(bh); | |
472 | mark_buffer_dirty_inode(bh, inode); | |
473 | } | |
474 | return bh; | |
475 | } | |
28de7948 | 476 | |
1da177e4 LT |
477 | return NULL; |
478 | } | |
479 | ||
fa33cdbf SM |
480 | /* Extend the file with new blocks totaling 'new_block_bytes', |
481 | * return the number of extents added | |
482 | */ | |
7e49b6f2 JK |
483 | static int udf_do_extend_file(struct inode *inode, |
484 | struct extent_position *last_pos, | |
485 | struct kernel_long_ad *last_ext, | |
fa33cdbf | 486 | loff_t new_block_bytes) |
31170b6a | 487 | { |
fa33cdbf | 488 | uint32_t add; |
31170b6a JK |
489 | int count = 0, fake = !(last_ext->extLength & UDF_EXTENT_LENGTH_MASK); |
490 | struct super_block *sb = inode->i_sb; | |
5ca4e4be | 491 | struct kernel_lb_addr prealloc_loc = {}; |
89a4d970 | 492 | uint32_t prealloc_len = 0; |
48d6d8ff | 493 | struct udf_inode_info *iinfo; |
7e49b6f2 | 494 | int err; |
31170b6a JK |
495 | |
496 | /* The previous extent is fake and we should not extend by anything | |
497 | * - there's nothing to do... */ | |
fa33cdbf | 498 | if (!new_block_bytes && fake) |
31170b6a | 499 | return 0; |
28de7948 | 500 | |
48d6d8ff | 501 | iinfo = UDF_I(inode); |
31170b6a JK |
502 | /* Round the last extent up to a multiple of block size */ |
503 | if (last_ext->extLength & (sb->s_blocksize - 1)) { | |
504 | last_ext->extLength = | |
28de7948 CG |
505 | (last_ext->extLength & UDF_EXTENT_FLAG_MASK) | |
506 | (((last_ext->extLength & UDF_EXTENT_LENGTH_MASK) + | |
507 | sb->s_blocksize - 1) & ~(sb->s_blocksize - 1)); | |
48d6d8ff MS |
508 | iinfo->i_lenExtents = |
509 | (iinfo->i_lenExtents + sb->s_blocksize - 1) & | |
28de7948 | 510 | ~(sb->s_blocksize - 1); |
31170b6a | 511 | } |
28de7948 | 512 | |
31170b6a | 513 | /* Last extent are just preallocated blocks? */ |
4b11111a MS |
514 | if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) == |
515 | EXT_NOT_RECORDED_ALLOCATED) { | |
31170b6a JK |
516 | /* Save the extent so that we can reattach it to the end */ |
517 | prealloc_loc = last_ext->extLocation; | |
518 | prealloc_len = last_ext->extLength; | |
519 | /* Mark the extent as a hole */ | |
520 | last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | | |
28de7948 | 521 | (last_ext->extLength & UDF_EXTENT_LENGTH_MASK); |
31170b6a | 522 | last_ext->extLocation.logicalBlockNum = 0; |
4b11111a | 523 | last_ext->extLocation.partitionReferenceNum = 0; |
31170b6a | 524 | } |
28de7948 | 525 | |
31170b6a | 526 | /* Can we merge with the previous extent? */ |
4b11111a MS |
527 | if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) == |
528 | EXT_NOT_RECORDED_NOT_ALLOCATED) { | |
fa33cdbf SM |
529 | add = (1 << 30) - sb->s_blocksize - |
530 | (last_ext->extLength & UDF_EXTENT_LENGTH_MASK); | |
531 | if (add > new_block_bytes) | |
532 | add = new_block_bytes; | |
533 | new_block_bytes -= add; | |
534 | last_ext->extLength += add; | |
31170b6a JK |
535 | } |
536 | ||
537 | if (fake) { | |
97e961fd | 538 | udf_add_aext(inode, last_pos, &last_ext->extLocation, |
cb00ea35 | 539 | last_ext->extLength, 1); |
31170b6a | 540 | count++; |
6c371578 JK |
541 | } else { |
542 | struct kernel_lb_addr tmploc; | |
543 | uint32_t tmplen; | |
544 | ||
97e961fd | 545 | udf_write_aext(inode, last_pos, &last_ext->extLocation, |
4b11111a | 546 | last_ext->extLength, 1); |
63c9e47a | 547 | |
6c371578 | 548 | /* |
63c9e47a SM |
549 | * We've rewritten the last extent. If we are going to add |
550 | * more extents, we may need to enter possible following | |
551 | * empty indirect extent. | |
6c371578 | 552 | */ |
63c9e47a SM |
553 | if (new_block_bytes || prealloc_len) |
554 | udf_next_aext(inode, last_pos, &tmploc, &tmplen, 0); | |
6c371578 | 555 | } |
28de7948 | 556 | |
31170b6a | 557 | /* Managed to do everything necessary? */ |
fa33cdbf | 558 | if (!new_block_bytes) |
31170b6a JK |
559 | goto out; |
560 | ||
561 | /* All further extents will be NOT_RECORDED_NOT_ALLOCATED */ | |
562 | last_ext->extLocation.logicalBlockNum = 0; | |
4b11111a | 563 | last_ext->extLocation.partitionReferenceNum = 0; |
fa33cdbf SM |
564 | add = (1 << 30) - sb->s_blocksize; |
565 | last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | add; | |
28de7948 | 566 | |
31170b6a | 567 | /* Create enough extents to cover the whole hole */ |
fa33cdbf SM |
568 | while (new_block_bytes > add) { |
569 | new_block_bytes -= add; | |
7e49b6f2 JK |
570 | err = udf_add_aext(inode, last_pos, &last_ext->extLocation, |
571 | last_ext->extLength, 1); | |
572 | if (err) | |
573 | return err; | |
31170b6a JK |
574 | count++; |
575 | } | |
fa33cdbf | 576 | if (new_block_bytes) { |
31170b6a | 577 | last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | |
fa33cdbf | 578 | new_block_bytes; |
7e49b6f2 JK |
579 | err = udf_add_aext(inode, last_pos, &last_ext->extLocation, |
580 | last_ext->extLength, 1); | |
581 | if (err) | |
582 | return err; | |
31170b6a JK |
583 | count++; |
584 | } | |
28de7948 CG |
585 | |
586 | out: | |
31170b6a JK |
587 | /* Do we have some preallocated blocks saved? */ |
588 | if (prealloc_len) { | |
7e49b6f2 JK |
589 | err = udf_add_aext(inode, last_pos, &prealloc_loc, |
590 | prealloc_len, 1); | |
591 | if (err) | |
592 | return err; | |
31170b6a JK |
593 | last_ext->extLocation = prealloc_loc; |
594 | last_ext->extLength = prealloc_len; | |
595 | count++; | |
596 | } | |
28de7948 | 597 | |
31170b6a | 598 | /* last_pos should point to the last written extent... */ |
48d6d8ff | 599 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
5ca4e4be | 600 | last_pos->offset -= sizeof(struct short_ad); |
48d6d8ff | 601 | else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
5ca4e4be | 602 | last_pos->offset -= sizeof(struct long_ad); |
31170b6a | 603 | else |
7e49b6f2 | 604 | return -EIO; |
28de7948 | 605 | |
31170b6a JK |
606 | return count; |
607 | } | |
608 | ||
fa33cdbf SM |
609 | /* Extend the final block of the file to final_block_len bytes */ |
610 | static void udf_do_extend_final_block(struct inode *inode, | |
611 | struct extent_position *last_pos, | |
612 | struct kernel_long_ad *last_ext, | |
613 | uint32_t final_block_len) | |
614 | { | |
615 | struct super_block *sb = inode->i_sb; | |
616 | uint32_t added_bytes; | |
617 | ||
618 | added_bytes = final_block_len - | |
619 | (last_ext->extLength & (sb->s_blocksize - 1)); | |
620 | last_ext->extLength += added_bytes; | |
621 | UDF_I(inode)->i_lenExtents += added_bytes; | |
622 | ||
623 | udf_write_aext(inode, last_pos, &last_ext->extLocation, | |
624 | last_ext->extLength, 1); | |
625 | } | |
626 | ||
7e49b6f2 JK |
627 | static int udf_extend_file(struct inode *inode, loff_t newsize) |
628 | { | |
629 | ||
630 | struct extent_position epos; | |
631 | struct kernel_lb_addr eloc; | |
632 | uint32_t elen; | |
633 | int8_t etype; | |
634 | struct super_block *sb = inode->i_sb; | |
635 | sector_t first_block = newsize >> sb->s_blocksize_bits, offset; | |
fa33cdbf | 636 | unsigned long partial_final_block; |
7e49b6f2 JK |
637 | int adsize; |
638 | struct udf_inode_info *iinfo = UDF_I(inode); | |
639 | struct kernel_long_ad extent; | |
fa33cdbf SM |
640 | int err = 0; |
641 | int within_final_block; | |
7e49b6f2 JK |
642 | |
643 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) | |
644 | adsize = sizeof(struct short_ad); | |
645 | else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) | |
646 | adsize = sizeof(struct long_ad); | |
647 | else | |
648 | BUG(); | |
649 | ||
650 | etype = inode_bmap(inode, first_block, &epos, &eloc, &elen, &offset); | |
fa33cdbf | 651 | within_final_block = (etype != -1); |
7e49b6f2 | 652 | |
7e49b6f2 JK |
653 | if ((!epos.bh && epos.offset == udf_file_entry_alloc_offset(inode)) || |
654 | (epos.bh && epos.offset == sizeof(struct allocExtDesc))) { | |
655 | /* File has no extents at all or has empty last | |
656 | * indirect extent! Create a fake extent... */ | |
657 | extent.extLocation.logicalBlockNum = 0; | |
658 | extent.extLocation.partitionReferenceNum = 0; | |
659 | extent.extLength = EXT_NOT_RECORDED_NOT_ALLOCATED; | |
660 | } else { | |
661 | epos.offset -= adsize; | |
662 | etype = udf_next_aext(inode, &epos, &extent.extLocation, | |
663 | &extent.extLength, 0); | |
664 | extent.extLength |= etype << 30; | |
665 | } | |
fa33cdbf SM |
666 | |
667 | partial_final_block = newsize & (sb->s_blocksize - 1); | |
668 | ||
669 | /* File has extent covering the new size (could happen when extending | |
670 | * inside a block)? | |
671 | */ | |
672 | if (within_final_block) { | |
673 | /* Extending file within the last file block */ | |
674 | udf_do_extend_final_block(inode, &epos, &extent, | |
675 | partial_final_block); | |
676 | } else { | |
677 | loff_t add = ((loff_t)offset << sb->s_blocksize_bits) | | |
678 | partial_final_block; | |
679 | err = udf_do_extend_file(inode, &epos, &extent, add); | |
680 | } | |
681 | ||
7e49b6f2 JK |
682 | if (err < 0) |
683 | goto out; | |
684 | err = 0; | |
685 | iinfo->i_lenExtents = newsize; | |
686 | out: | |
687 | brelse(epos.bh); | |
688 | return err; | |
689 | } | |
690 | ||
7b0b0933 JK |
691 | static sector_t inode_getblk(struct inode *inode, sector_t block, |
692 | int *err, int *new) | |
1da177e4 | 693 | { |
5ca4e4be | 694 | struct kernel_long_ad laarr[EXTENT_MERGE_SIZE]; |
ff116fc8 | 695 | struct extent_position prev_epos, cur_epos, next_epos; |
1da177e4 | 696 | int count = 0, startnum = 0, endnum = 0; |
85d71244 | 697 | uint32_t elen = 0, tmpelen; |
5ca4e4be | 698 | struct kernel_lb_addr eloc, tmpeloc; |
1da177e4 | 699 | int c = 1; |
60448b1d | 700 | loff_t lbcount = 0, b_off = 0; |
b490bdd6 | 701 | udf_pblk_t newblocknum, newblock; |
60448b1d | 702 | sector_t offset = 0; |
1da177e4 | 703 | int8_t etype; |
48d6d8ff | 704 | struct udf_inode_info *iinfo = UDF_I(inode); |
b490bdd6 | 705 | udf_pblk_t goal = 0, pgoal = iinfo->i_location.logicalBlockNum; |
31170b6a | 706 | int lastblock = 0; |
fb719c59 | 707 | bool isBeyondEOF; |
1da177e4 | 708 | |
7b0b0933 JK |
709 | *err = 0; |
710 | *new = 0; | |
ff116fc8 | 711 | prev_epos.offset = udf_file_entry_alloc_offset(inode); |
48d6d8ff | 712 | prev_epos.block = iinfo->i_location; |
ff116fc8 JK |
713 | prev_epos.bh = NULL; |
714 | cur_epos = next_epos = prev_epos; | |
28de7948 | 715 | b_off = (loff_t)block << inode->i_sb->s_blocksize_bits; |
1da177e4 LT |
716 | |
717 | /* find the extent which contains the block we are looking for. | |
cb00ea35 CG |
718 | alternate between laarr[0] and laarr[1] for locations of the |
719 | current extent, and the previous extent */ | |
720 | do { | |
721 | if (prev_epos.bh != cur_epos.bh) { | |
3bf25cb4 JK |
722 | brelse(prev_epos.bh); |
723 | get_bh(cur_epos.bh); | |
ff116fc8 | 724 | prev_epos.bh = cur_epos.bh; |
1da177e4 | 725 | } |
cb00ea35 | 726 | if (cur_epos.bh != next_epos.bh) { |
3bf25cb4 JK |
727 | brelse(cur_epos.bh); |
728 | get_bh(next_epos.bh); | |
ff116fc8 | 729 | cur_epos.bh = next_epos.bh; |
1da177e4 LT |
730 | } |
731 | ||
732 | lbcount += elen; | |
733 | ||
ff116fc8 JK |
734 | prev_epos.block = cur_epos.block; |
735 | cur_epos.block = next_epos.block; | |
1da177e4 | 736 | |
ff116fc8 JK |
737 | prev_epos.offset = cur_epos.offset; |
738 | cur_epos.offset = next_epos.offset; | |
1da177e4 | 739 | |
4b11111a MS |
740 | etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 1); |
741 | if (etype == -1) | |
1da177e4 LT |
742 | break; |
743 | ||
744 | c = !c; | |
745 | ||
746 | laarr[c].extLength = (etype << 30) | elen; | |
747 | laarr[c].extLocation = eloc; | |
748 | ||
749 | if (etype != (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) | |
750 | pgoal = eloc.logicalBlockNum + | |
28de7948 CG |
751 | ((elen + inode->i_sb->s_blocksize - 1) >> |
752 | inode->i_sb->s_blocksize_bits); | |
1da177e4 | 753 | |
cb00ea35 | 754 | count++; |
1da177e4 LT |
755 | } while (lbcount + elen <= b_off); |
756 | ||
757 | b_off -= lbcount; | |
758 | offset = b_off >> inode->i_sb->s_blocksize_bits; | |
85d71244 JK |
759 | /* |
760 | * Move prev_epos and cur_epos into indirect extent if we are at | |
761 | * the pointer to it | |
762 | */ | |
763 | udf_next_aext(inode, &prev_epos, &tmpeloc, &tmpelen, 0); | |
764 | udf_next_aext(inode, &cur_epos, &tmpeloc, &tmpelen, 0); | |
1da177e4 LT |
765 | |
766 | /* if the extent is allocated and recorded, return the block | |
cb00ea35 | 767 | if the extent is not a multiple of the blocksize, round up */ |
1da177e4 | 768 | |
cb00ea35 CG |
769 | if (etype == (EXT_RECORDED_ALLOCATED >> 30)) { |
770 | if (elen & (inode->i_sb->s_blocksize - 1)) { | |
1da177e4 | 771 | elen = EXT_RECORDED_ALLOCATED | |
28de7948 CG |
772 | ((elen + inode->i_sb->s_blocksize - 1) & |
773 | ~(inode->i_sb->s_blocksize - 1)); | |
7e49b6f2 | 774 | udf_write_aext(inode, &cur_epos, &eloc, elen, 1); |
1da177e4 | 775 | } |
97e961fd | 776 | newblock = udf_get_lb_pblock(inode->i_sb, &eloc, offset); |
02d4ca49 | 777 | goto out_free; |
1da177e4 LT |
778 | } |
779 | ||
31170b6a | 780 | /* Are we beyond EOF? */ |
cb00ea35 | 781 | if (etype == -1) { |
31170b6a | 782 | int ret; |
fa33cdbf | 783 | loff_t hole_len; |
6981498d | 784 | isBeyondEOF = true; |
31170b6a JK |
785 | if (count) { |
786 | if (c) | |
787 | laarr[0] = laarr[1]; | |
788 | startnum = 1; | |
cb00ea35 | 789 | } else { |
31170b6a | 790 | /* Create a fake extent when there's not one */ |
4b11111a | 791 | memset(&laarr[0].extLocation, 0x00, |
5ca4e4be | 792 | sizeof(struct kernel_lb_addr)); |
31170b6a | 793 | laarr[0].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED; |
7e49b6f2 | 794 | /* Will udf_do_extend_file() create real extent from |
4b11111a | 795 | a fake one? */ |
31170b6a JK |
796 | startnum = (offset > 0); |
797 | } | |
798 | /* Create extents for the hole between EOF and offset */ | |
fa33cdbf SM |
799 | hole_len = (loff_t)offset << inode->i_blkbits; |
800 | ret = udf_do_extend_file(inode, &prev_epos, laarr, hole_len); | |
7e49b6f2 | 801 | if (ret < 0) { |
7e49b6f2 | 802 | *err = ret; |
02d4ca49 FF |
803 | newblock = 0; |
804 | goto out_free; | |
31170b6a JK |
805 | } |
806 | c = 0; | |
807 | offset = 0; | |
808 | count += ret; | |
809 | /* We are not covered by a preallocated extent? */ | |
4b11111a MS |
810 | if ((laarr[0].extLength & UDF_EXTENT_FLAG_MASK) != |
811 | EXT_NOT_RECORDED_ALLOCATED) { | |
31170b6a JK |
812 | /* Is there any real extent? - otherwise we overwrite |
813 | * the fake one... */ | |
814 | if (count) | |
815 | c = !c; | |
816 | laarr[c].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | | |
28de7948 | 817 | inode->i_sb->s_blocksize; |
4b11111a | 818 | memset(&laarr[c].extLocation, 0x00, |
5ca4e4be | 819 | sizeof(struct kernel_lb_addr)); |
cb00ea35 | 820 | count++; |
31170b6a | 821 | } |
cb00ea35 | 822 | endnum = c + 1; |
1da177e4 | 823 | lastblock = 1; |
cb00ea35 | 824 | } else { |
6981498d | 825 | isBeyondEOF = false; |
1da177e4 LT |
826 | endnum = startnum = ((count > 2) ? 2 : count); |
827 | ||
4b11111a MS |
828 | /* if the current extent is in position 0, |
829 | swap it with the previous */ | |
cb00ea35 | 830 | if (!c && count != 1) { |
31170b6a JK |
831 | laarr[2] = laarr[0]; |
832 | laarr[0] = laarr[1]; | |
833 | laarr[1] = laarr[2]; | |
834 | c = 1; | |
835 | } | |
1da177e4 | 836 | |
4b11111a MS |
837 | /* if the current block is located in an extent, |
838 | read the next extent */ | |
839 | etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 0); | |
840 | if (etype != -1) { | |
cb00ea35 CG |
841 | laarr[c + 1].extLength = (etype << 30) | elen; |
842 | laarr[c + 1].extLocation = eloc; | |
843 | count++; | |
844 | startnum++; | |
845 | endnum++; | |
4b11111a | 846 | } else |
1da177e4 LT |
847 | lastblock = 1; |
848 | } | |
1da177e4 LT |
849 | |
850 | /* if the current extent is not recorded but allocated, get the | |
28de7948 | 851 | * block in the extent corresponding to the requested block */ |
4b11111a | 852 | if ((laarr[c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30)) |
1da177e4 | 853 | newblocknum = laarr[c].extLocation.logicalBlockNum + offset; |
4b11111a | 854 | else { /* otherwise, allocate a new block */ |
48d6d8ff MS |
855 | if (iinfo->i_next_alloc_block == block) |
856 | goal = iinfo->i_next_alloc_goal; | |
1da177e4 | 857 | |
cb00ea35 | 858 | if (!goal) { |
4b11111a | 859 | if (!(goal = pgoal)) /* XXX: what was intended here? */ |
48d6d8ff | 860 | goal = iinfo->i_location.logicalBlockNum + 1; |
1da177e4 LT |
861 | } |
862 | ||
4b11111a | 863 | newblocknum = udf_new_block(inode->i_sb, inode, |
48d6d8ff | 864 | iinfo->i_location.partitionReferenceNum, |
4b11111a MS |
865 | goal, err); |
866 | if (!newblocknum) { | |
1da177e4 | 867 | *err = -ENOSPC; |
02d4ca49 FF |
868 | newblock = 0; |
869 | goto out_free; | |
1da177e4 | 870 | } |
fb719c59 NJ |
871 | if (isBeyondEOF) |
872 | iinfo->i_lenExtents += inode->i_sb->s_blocksize; | |
1da177e4 LT |
873 | } |
874 | ||
4b11111a MS |
875 | /* if the extent the requsted block is located in contains multiple |
876 | * blocks, split the extent into at most three extents. blocks prior | |
877 | * to requested block, requested block, and blocks after requested | |
878 | * block */ | |
1da177e4 LT |
879 | udf_split_extents(inode, &c, offset, newblocknum, laarr, &endnum); |
880 | ||
81056dd0 JK |
881 | /* We preallocate blocks only for regular files. It also makes sense |
882 | * for directories but there's a problem when to drop the | |
883 | * preallocation. We might use some delayed work for that but I feel | |
884 | * it's overengineering for a filesystem like UDF. */ | |
885 | if (S_ISREG(inode->i_mode)) | |
886 | udf_prealloc_extents(inode, c, lastblock, laarr, &endnum); | |
1da177e4 LT |
887 | |
888 | /* merge any continuous blocks in laarr */ | |
889 | udf_merge_extents(inode, laarr, &endnum); | |
890 | ||
891 | /* write back the new extents, inserting new extents if the new number | |
28de7948 CG |
892 | * of extents is greater than the old number, and deleting extents if |
893 | * the new number of extents is less than the old number */ | |
ff116fc8 | 894 | udf_update_extents(inode, laarr, startnum, endnum, &prev_epos); |
1da177e4 | 895 | |
4b11111a | 896 | newblock = udf_get_pblock(inode->i_sb, newblocknum, |
48d6d8ff | 897 | iinfo->i_location.partitionReferenceNum, 0); |
7b0b0933 JK |
898 | if (!newblock) { |
899 | *err = -EIO; | |
02d4ca49 | 900 | goto out_free; |
7b0b0933 | 901 | } |
1da177e4 | 902 | *new = 1; |
48d6d8ff MS |
903 | iinfo->i_next_alloc_block = block; |
904 | iinfo->i_next_alloc_goal = newblocknum; | |
c2050a45 | 905 | inode->i_ctime = current_time(inode); |
1da177e4 LT |
906 | |
907 | if (IS_SYNC(inode)) | |
908 | udf_sync_inode(inode); | |
909 | else | |
910 | mark_inode_dirty(inode); | |
02d4ca49 FF |
911 | out_free: |
912 | brelse(prev_epos.bh); | |
913 | brelse(cur_epos.bh); | |
914 | brelse(next_epos.bh); | |
7b0b0933 | 915 | return newblock; |
1da177e4 LT |
916 | } |
917 | ||
cb00ea35 | 918 | static void udf_split_extents(struct inode *inode, int *c, int offset, |
b490bdd6 SM |
919 | udf_pblk_t newblocknum, |
920 | struct kernel_long_ad *laarr, int *endnum) | |
1da177e4 | 921 | { |
4b11111a MS |
922 | unsigned long blocksize = inode->i_sb->s_blocksize; |
923 | unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; | |
924 | ||
1da177e4 | 925 | if ((laarr[*c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30) || |
4b11111a MS |
926 | (laarr[*c].extLength >> 30) == |
927 | (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) { | |
1da177e4 LT |
928 | int curr = *c; |
929 | int blen = ((laarr[curr].extLength & UDF_EXTENT_LENGTH_MASK) + | |
4b11111a | 930 | blocksize - 1) >> blocksize_bits; |
1da177e4 LT |
931 | int8_t etype = (laarr[curr].extLength >> 30); |
932 | ||
4b11111a | 933 | if (blen == 1) |
28de7948 | 934 | ; |
4b11111a | 935 | else if (!offset || blen == offset + 1) { |
cb00ea35 CG |
936 | laarr[curr + 2] = laarr[curr + 1]; |
937 | laarr[curr + 1] = laarr[curr]; | |
938 | } else { | |
939 | laarr[curr + 3] = laarr[curr + 1]; | |
940 | laarr[curr + 2] = laarr[curr + 1] = laarr[curr]; | |
941 | } | |
942 | ||
943 | if (offset) { | |
944 | if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30)) { | |
4b11111a | 945 | udf_free_blocks(inode->i_sb, inode, |
97e961fd | 946 | &laarr[curr].extLocation, |
4b11111a MS |
947 | 0, offset); |
948 | laarr[curr].extLength = | |
949 | EXT_NOT_RECORDED_NOT_ALLOCATED | | |
950 | (offset << blocksize_bits); | |
1da177e4 | 951 | laarr[curr].extLocation.logicalBlockNum = 0; |
4b11111a MS |
952 | laarr[curr].extLocation. |
953 | partitionReferenceNum = 0; | |
954 | } else | |
1da177e4 | 955 | laarr[curr].extLength = (etype << 30) | |
4b11111a | 956 | (offset << blocksize_bits); |
cb00ea35 CG |
957 | curr++; |
958 | (*c)++; | |
959 | (*endnum)++; | |
1da177e4 | 960 | } |
647bd61a | 961 | |
1da177e4 LT |
962 | laarr[curr].extLocation.logicalBlockNum = newblocknum; |
963 | if (etype == (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) | |
964 | laarr[curr].extLocation.partitionReferenceNum = | |
c0b34438 | 965 | UDF_I(inode)->i_location.partitionReferenceNum; |
1da177e4 | 966 | laarr[curr].extLength = EXT_RECORDED_ALLOCATED | |
4b11111a | 967 | blocksize; |
cb00ea35 | 968 | curr++; |
1da177e4 | 969 | |
cb00ea35 | 970 | if (blen != offset + 1) { |
1da177e4 | 971 | if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30)) |
4b11111a MS |
972 | laarr[curr].extLocation.logicalBlockNum += |
973 | offset + 1; | |
28de7948 | 974 | laarr[curr].extLength = (etype << 30) | |
4b11111a | 975 | ((blen - (offset + 1)) << blocksize_bits); |
cb00ea35 CG |
976 | curr++; |
977 | (*endnum)++; | |
1da177e4 LT |
978 | } |
979 | } | |
980 | } | |
981 | ||
982 | static void udf_prealloc_extents(struct inode *inode, int c, int lastblock, | |
3cc6f844 | 983 | struct kernel_long_ad *laarr, |
cb00ea35 | 984 | int *endnum) |
1da177e4 LT |
985 | { |
986 | int start, length = 0, currlength = 0, i; | |
987 | ||
cb00ea35 | 988 | if (*endnum >= (c + 1)) { |
1da177e4 LT |
989 | if (!lastblock) |
990 | return; | |
991 | else | |
992 | start = c; | |
cb00ea35 | 993 | } else { |
4b11111a MS |
994 | if ((laarr[c + 1].extLength >> 30) == |
995 | (EXT_NOT_RECORDED_ALLOCATED >> 30)) { | |
cb00ea35 | 996 | start = c + 1; |
4b11111a MS |
997 | length = currlength = |
998 | (((laarr[c + 1].extLength & | |
999 | UDF_EXTENT_LENGTH_MASK) + | |
1000 | inode->i_sb->s_blocksize - 1) >> | |
1001 | inode->i_sb->s_blocksize_bits); | |
1002 | } else | |
1da177e4 LT |
1003 | start = c; |
1004 | } | |
1005 | ||
cb00ea35 CG |
1006 | for (i = start + 1; i <= *endnum; i++) { |
1007 | if (i == *endnum) { | |
1da177e4 LT |
1008 | if (lastblock) |
1009 | length += UDF_DEFAULT_PREALLOC_BLOCKS; | |
4b11111a MS |
1010 | } else if ((laarr[i].extLength >> 30) == |
1011 | (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) { | |
1012 | length += (((laarr[i].extLength & | |
1013 | UDF_EXTENT_LENGTH_MASK) + | |
1014 | inode->i_sb->s_blocksize - 1) >> | |
1015 | inode->i_sb->s_blocksize_bits); | |
1016 | } else | |
1da177e4 LT |
1017 | break; |
1018 | } | |
1019 | ||
cb00ea35 | 1020 | if (length) { |
1da177e4 | 1021 | int next = laarr[start].extLocation.logicalBlockNum + |
28de7948 | 1022 | (((laarr[start].extLength & UDF_EXTENT_LENGTH_MASK) + |
4b11111a MS |
1023 | inode->i_sb->s_blocksize - 1) >> |
1024 | inode->i_sb->s_blocksize_bits); | |
1da177e4 | 1025 | int numalloc = udf_prealloc_blocks(inode->i_sb, inode, |
4b11111a MS |
1026 | laarr[start].extLocation.partitionReferenceNum, |
1027 | next, (UDF_DEFAULT_PREALLOC_BLOCKS > length ? | |
1028 | length : UDF_DEFAULT_PREALLOC_BLOCKS) - | |
1029 | currlength); | |
28de7948 | 1030 | if (numalloc) { |
4b11111a | 1031 | if (start == (c + 1)) |
1da177e4 | 1032 | laarr[start].extLength += |
4b11111a MS |
1033 | (numalloc << |
1034 | inode->i_sb->s_blocksize_bits); | |
1035 | else { | |
cb00ea35 | 1036 | memmove(&laarr[c + 2], &laarr[c + 1], |
5ca4e4be | 1037 | sizeof(struct long_ad) * (*endnum - (c + 1))); |
cb00ea35 CG |
1038 | (*endnum)++; |
1039 | laarr[c + 1].extLocation.logicalBlockNum = next; | |
1040 | laarr[c + 1].extLocation.partitionReferenceNum = | |
4b11111a MS |
1041 | laarr[c].extLocation. |
1042 | partitionReferenceNum; | |
1043 | laarr[c + 1].extLength = | |
1044 | EXT_NOT_RECORDED_ALLOCATED | | |
1045 | (numalloc << | |
1046 | inode->i_sb->s_blocksize_bits); | |
cb00ea35 | 1047 | start = c + 1; |
1da177e4 LT |
1048 | } |
1049 | ||
cb00ea35 | 1050 | for (i = start + 1; numalloc && i < *endnum; i++) { |
4b11111a MS |
1051 | int elen = ((laarr[i].extLength & |
1052 | UDF_EXTENT_LENGTH_MASK) + | |
1053 | inode->i_sb->s_blocksize - 1) >> | |
1054 | inode->i_sb->s_blocksize_bits; | |
1da177e4 | 1055 | |
cb00ea35 | 1056 | if (elen > numalloc) { |
1da177e4 | 1057 | laarr[i].extLength -= |
4b11111a MS |
1058 | (numalloc << |
1059 | inode->i_sb->s_blocksize_bits); | |
1da177e4 | 1060 | numalloc = 0; |
cb00ea35 | 1061 | } else { |
1da177e4 | 1062 | numalloc -= elen; |
cb00ea35 | 1063 | if (*endnum > (i + 1)) |
4b11111a MS |
1064 | memmove(&laarr[i], |
1065 | &laarr[i + 1], | |
5ca4e4be | 1066 | sizeof(struct long_ad) * |
4b11111a | 1067 | (*endnum - (i + 1))); |
cb00ea35 CG |
1068 | i--; |
1069 | (*endnum)--; | |
1da177e4 LT |
1070 | } |
1071 | } | |
c0b34438 | 1072 | UDF_I(inode)->i_lenExtents += |
4b11111a | 1073 | numalloc << inode->i_sb->s_blocksize_bits; |
1da177e4 LT |
1074 | } |
1075 | } | |
1076 | } | |
1077 | ||
3cc6f844 | 1078 | static void udf_merge_extents(struct inode *inode, struct kernel_long_ad *laarr, |
cb00ea35 | 1079 | int *endnum) |
1da177e4 LT |
1080 | { |
1081 | int i; | |
4b11111a MS |
1082 | unsigned long blocksize = inode->i_sb->s_blocksize; |
1083 | unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; | |
1da177e4 | 1084 | |
cb00ea35 | 1085 | for (i = 0; i < (*endnum - 1); i++) { |
5ca4e4be PE |
1086 | struct kernel_long_ad *li /*l[i]*/ = &laarr[i]; |
1087 | struct kernel_long_ad *lip1 /*l[i plus 1]*/ = &laarr[i + 1]; | |
4b11111a MS |
1088 | |
1089 | if (((li->extLength >> 30) == (lip1->extLength >> 30)) && | |
1090 | (((li->extLength >> 30) == | |
1091 | (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) || | |
1092 | ((lip1->extLocation.logicalBlockNum - | |
1093 | li->extLocation.logicalBlockNum) == | |
1094 | (((li->extLength & UDF_EXTENT_LENGTH_MASK) + | |
1095 | blocksize - 1) >> blocksize_bits)))) { | |
1096 | ||
1097 | if (((li->extLength & UDF_EXTENT_LENGTH_MASK) + | |
1098 | (lip1->extLength & UDF_EXTENT_LENGTH_MASK) + | |
1099 | blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) { | |
1100 | lip1->extLength = (lip1->extLength - | |
1101 | (li->extLength & | |
1102 | UDF_EXTENT_LENGTH_MASK) + | |
1103 | UDF_EXTENT_LENGTH_MASK) & | |
1104 | ~(blocksize - 1); | |
1105 | li->extLength = (li->extLength & | |
1106 | UDF_EXTENT_FLAG_MASK) + | |
1107 | (UDF_EXTENT_LENGTH_MASK + 1) - | |
1108 | blocksize; | |
1109 | lip1->extLocation.logicalBlockNum = | |
1110 | li->extLocation.logicalBlockNum + | |
1111 | ((li->extLength & | |
1112 | UDF_EXTENT_LENGTH_MASK) >> | |
1113 | blocksize_bits); | |
1114 | } else { | |
1115 | li->extLength = lip1->extLength + | |
1116 | (((li->extLength & | |
1117 | UDF_EXTENT_LENGTH_MASK) + | |
1118 | blocksize - 1) & ~(blocksize - 1)); | |
1119 | if (*endnum > (i + 2)) | |
1120 | memmove(&laarr[i + 1], &laarr[i + 2], | |
5ca4e4be | 1121 | sizeof(struct long_ad) * |
4b11111a MS |
1122 | (*endnum - (i + 2))); |
1123 | i--; | |
1124 | (*endnum)--; | |
1da177e4 | 1125 | } |
4b11111a MS |
1126 | } else if (((li->extLength >> 30) == |
1127 | (EXT_NOT_RECORDED_ALLOCATED >> 30)) && | |
1128 | ((lip1->extLength >> 30) == | |
1129 | (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))) { | |
97e961fd | 1130 | udf_free_blocks(inode->i_sb, inode, &li->extLocation, 0, |
4b11111a MS |
1131 | ((li->extLength & |
1132 | UDF_EXTENT_LENGTH_MASK) + | |
1133 | blocksize - 1) >> blocksize_bits); | |
1134 | li->extLocation.logicalBlockNum = 0; | |
1135 | li->extLocation.partitionReferenceNum = 0; | |
1136 | ||
1137 | if (((li->extLength & UDF_EXTENT_LENGTH_MASK) + | |
1138 | (lip1->extLength & UDF_EXTENT_LENGTH_MASK) + | |
1139 | blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) { | |
1140 | lip1->extLength = (lip1->extLength - | |
1141 | (li->extLength & | |
1142 | UDF_EXTENT_LENGTH_MASK) + | |
1143 | UDF_EXTENT_LENGTH_MASK) & | |
1144 | ~(blocksize - 1); | |
1145 | li->extLength = (li->extLength & | |
1146 | UDF_EXTENT_FLAG_MASK) + | |
1147 | (UDF_EXTENT_LENGTH_MASK + 1) - | |
1148 | blocksize; | |
cb00ea35 | 1149 | } else { |
4b11111a MS |
1150 | li->extLength = lip1->extLength + |
1151 | (((li->extLength & | |
1152 | UDF_EXTENT_LENGTH_MASK) + | |
1153 | blocksize - 1) & ~(blocksize - 1)); | |
cb00ea35 CG |
1154 | if (*endnum > (i + 2)) |
1155 | memmove(&laarr[i + 1], &laarr[i + 2], | |
5ca4e4be | 1156 | sizeof(struct long_ad) * |
4b11111a | 1157 | (*endnum - (i + 2))); |
cb00ea35 CG |
1158 | i--; |
1159 | (*endnum)--; | |
1da177e4 | 1160 | } |
4b11111a MS |
1161 | } else if ((li->extLength >> 30) == |
1162 | (EXT_NOT_RECORDED_ALLOCATED >> 30)) { | |
1163 | udf_free_blocks(inode->i_sb, inode, | |
97e961fd | 1164 | &li->extLocation, 0, |
4b11111a MS |
1165 | ((li->extLength & |
1166 | UDF_EXTENT_LENGTH_MASK) + | |
1167 | blocksize - 1) >> blocksize_bits); | |
1168 | li->extLocation.logicalBlockNum = 0; | |
1169 | li->extLocation.partitionReferenceNum = 0; | |
1170 | li->extLength = (li->extLength & | |
1171 | UDF_EXTENT_LENGTH_MASK) | | |
1172 | EXT_NOT_RECORDED_NOT_ALLOCATED; | |
1da177e4 LT |
1173 | } |
1174 | } | |
1175 | } | |
1176 | ||
3cc6f844 | 1177 | static void udf_update_extents(struct inode *inode, struct kernel_long_ad *laarr, |
cb00ea35 CG |
1178 | int startnum, int endnum, |
1179 | struct extent_position *epos) | |
1da177e4 LT |
1180 | { |
1181 | int start = 0, i; | |
5ca4e4be | 1182 | struct kernel_lb_addr tmploc; |
1da177e4 LT |
1183 | uint32_t tmplen; |
1184 | ||
cb00ea35 CG |
1185 | if (startnum > endnum) { |
1186 | for (i = 0; i < (startnum - endnum); i++) | |
6c1e4d06 | 1187 | udf_delete_aext(inode, *epos); |
cb00ea35 CG |
1188 | } else if (startnum < endnum) { |
1189 | for (i = 0; i < (endnum - startnum); i++) { | |
ff116fc8 | 1190 | udf_insert_aext(inode, *epos, laarr[i].extLocation, |
cb00ea35 | 1191 | laarr[i].extLength); |
ff116fc8 | 1192 | udf_next_aext(inode, epos, &laarr[i].extLocation, |
cb00ea35 CG |
1193 | &laarr[i].extLength, 1); |
1194 | start++; | |
1da177e4 LT |
1195 | } |
1196 | } | |
1197 | ||
cb00ea35 | 1198 | for (i = start; i < endnum; i++) { |
ff116fc8 | 1199 | udf_next_aext(inode, epos, &tmploc, &tmplen, 0); |
97e961fd | 1200 | udf_write_aext(inode, epos, &laarr[i].extLocation, |
cb00ea35 | 1201 | laarr[i].extLength, 1); |
1da177e4 LT |
1202 | } |
1203 | } | |
1204 | ||
b490bdd6 | 1205 | struct buffer_head *udf_bread(struct inode *inode, udf_pblk_t block, |
cb00ea35 | 1206 | int create, int *err) |
1da177e4 | 1207 | { |
cb00ea35 | 1208 | struct buffer_head *bh = NULL; |
1da177e4 LT |
1209 | |
1210 | bh = udf_getblk(inode, block, create, err); | |
1211 | if (!bh) | |
1212 | return NULL; | |
1213 | ||
59a16786 | 1214 | if (bh_read(bh, 0) >= 0) |
1da177e4 | 1215 | return bh; |
28de7948 | 1216 | |
1da177e4 LT |
1217 | brelse(bh); |
1218 | *err = -EIO; | |
1219 | return NULL; | |
1220 | } | |
1221 | ||
7e49b6f2 | 1222 | int udf_setsize(struct inode *inode, loff_t newsize) |
1da177e4 | 1223 | { |
1da177e4 | 1224 | int err; |
48d6d8ff | 1225 | struct udf_inode_info *iinfo; |
89a4d970 | 1226 | unsigned int bsize = i_blocksize(inode); |
1da177e4 LT |
1227 | |
1228 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || | |
cb00ea35 | 1229 | S_ISLNK(inode->i_mode))) |
7e49b6f2 | 1230 | return -EINVAL; |
1da177e4 | 1231 | if (IS_APPEND(inode) || IS_IMMUTABLE(inode)) |
7e49b6f2 | 1232 | return -EPERM; |
1da177e4 | 1233 | |
48d6d8ff | 1234 | iinfo = UDF_I(inode); |
7e49b6f2 | 1235 | if (newsize > inode->i_size) { |
4d0fb621 | 1236 | down_write(&iinfo->i_data_sem); |
7e49b6f2 JK |
1237 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { |
1238 | if (bsize < | |
1239 | (udf_file_entry_alloc_offset(inode) + newsize)) { | |
1240 | err = udf_expand_file_adinicb(inode); | |
d2eb8c35 | 1241 | if (err) |
7e49b6f2 | 1242 | return err; |
d2eb8c35 | 1243 | down_write(&iinfo->i_data_sem); |
bb2b6d19 | 1244 | } else { |
7e49b6f2 | 1245 | iinfo->i_lenAlloc = newsize; |
bb2b6d19 IA |
1246 | goto set_size; |
1247 | } | |
7e49b6f2 JK |
1248 | } |
1249 | err = udf_extend_file(inode, newsize); | |
1250 | if (err) { | |
1251 | up_write(&iinfo->i_data_sem); | |
1252 | return err; | |
1da177e4 | 1253 | } |
bb2b6d19 | 1254 | set_size: |
4d0fb621 | 1255 | up_write(&iinfo->i_data_sem); |
f2e95355 | 1256 | truncate_setsize(inode, newsize); |
cb00ea35 | 1257 | } else { |
7e49b6f2 JK |
1258 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { |
1259 | down_write(&iinfo->i_data_sem); | |
99600051 | 1260 | udf_clear_extent_cache(inode); |
382a2287 | 1261 | memset(iinfo->i_data + iinfo->i_lenEAttr + newsize, |
7e49b6f2 JK |
1262 | 0x00, bsize - newsize - |
1263 | udf_file_entry_alloc_offset(inode)); | |
1264 | iinfo->i_lenAlloc = newsize; | |
1265 | truncate_setsize(inode, newsize); | |
1266 | up_write(&iinfo->i_data_sem); | |
1267 | goto update_time; | |
1268 | } | |
1269 | err = block_truncate_page(inode->i_mapping, newsize, | |
1270 | udf_get_block); | |
1271 | if (err) | |
1272 | return err; | |
f2e95355 | 1273 | truncate_setsize(inode, newsize); |
4d0fb621 | 1274 | down_write(&iinfo->i_data_sem); |
99600051 | 1275 | udf_clear_extent_cache(inode); |
2b42be5e | 1276 | err = udf_truncate_extents(inode); |
4d0fb621 | 1277 | up_write(&iinfo->i_data_sem); |
2b42be5e JK |
1278 | if (err) |
1279 | return err; | |
647bd61a | 1280 | } |
7e49b6f2 | 1281 | update_time: |
c2050a45 | 1282 | inode->i_mtime = inode->i_ctime = current_time(inode); |
1da177e4 | 1283 | if (IS_SYNC(inode)) |
cb00ea35 | 1284 | udf_sync_inode(inode); |
1da177e4 LT |
1285 | else |
1286 | mark_inode_dirty(inode); | |
7e49b6f2 | 1287 | return 0; |
1da177e4 LT |
1288 | } |
1289 | ||
c03aa9f6 JK |
1290 | /* |
1291 | * Maximum length of linked list formed by ICB hierarchy. The chosen number is | |
1292 | * arbitrary - just that we hopefully don't limit any real use of rewritten | |
1293 | * inode on write-once media but avoid looping for too long on corrupted media. | |
1294 | */ | |
1295 | #define UDF_MAX_ICB_NESTING 1024 | |
1296 | ||
6174c2eb | 1297 | static int udf_read_inode(struct inode *inode, bool hidden_inode) |
1da177e4 LT |
1298 | { |
1299 | struct buffer_head *bh = NULL; | |
1300 | struct fileEntry *fe; | |
bb7720a0 | 1301 | struct extendedFileEntry *efe; |
1da177e4 | 1302 | uint16_t ident; |
48d6d8ff | 1303 | struct udf_inode_info *iinfo = UDF_I(inode); |
bb7720a0 | 1304 | struct udf_sb_info *sbi = UDF_SB(inode->i_sb); |
6d3d5e86 | 1305 | struct kernel_lb_addr *iloc = &iinfo->i_location; |
bb7720a0 | 1306 | unsigned int link_count; |
c03aa9f6 | 1307 | unsigned int indirections = 0; |
79144954 | 1308 | int bs = inode->i_sb->s_blocksize; |
6d3d5e86 | 1309 | int ret = -EIO; |
0c9850f4 | 1310 | uint32_t uid, gid; |
1da177e4 | 1311 | |
c03aa9f6 | 1312 | reread: |
1d82a56b | 1313 | if (iloc->partitionReferenceNum >= sbi->s_partitions) { |
fcbf7637 | 1314 | udf_debug("partition reference: %u > logical volume partitions: %u\n", |
1d82a56b FF |
1315 | iloc->partitionReferenceNum, sbi->s_partitions); |
1316 | return -EIO; | |
1317 | } | |
1318 | ||
6d3d5e86 JK |
1319 | if (iloc->logicalBlockNum >= |
1320 | sbi->s_partmaps[iloc->partitionReferenceNum].s_partition_len) { | |
fcbf7637 | 1321 | udf_debug("block=%u, partition=%u out of range\n", |
6d3d5e86 JK |
1322 | iloc->logicalBlockNum, iloc->partitionReferenceNum); |
1323 | return -EIO; | |
1324 | } | |
1325 | ||
1da177e4 LT |
1326 | /* |
1327 | * Set defaults, but the inode is still incomplete! | |
1328 | * Note: get_new_inode() sets the following on a new inode: | |
1329 | * i_sb = sb | |
1330 | * i_no = ino | |
1331 | * i_flags = sb->s_flags | |
1332 | * i_state = 0 | |
1333 | * clean_inode(): zero fills and sets | |
1334 | * i_count = 1 | |
1335 | * i_nlink = 1 | |
1336 | * i_op = NULL; | |
1337 | */ | |
6d3d5e86 | 1338 | bh = udf_read_ptagged(inode->i_sb, iloc, 0, &ident); |
cb00ea35 | 1339 | if (!bh) { |
fcbf7637 | 1340 | udf_err(inode->i_sb, "(ino %lu) failed !bh\n", inode->i_ino); |
6d3d5e86 | 1341 | return -EIO; |
1da177e4 LT |
1342 | } |
1343 | ||
1344 | if (ident != TAG_IDENT_FE && ident != TAG_IDENT_EFE && | |
cb00ea35 | 1345 | ident != TAG_IDENT_USE) { |
fcbf7637 | 1346 | udf_err(inode->i_sb, "(ino %lu) failed ident=%u\n", |
78ace70c | 1347 | inode->i_ino, ident); |
6d3d5e86 | 1348 | goto out; |
1da177e4 LT |
1349 | } |
1350 | ||
1351 | fe = (struct fileEntry *)bh->b_data; | |
bb7720a0 | 1352 | efe = (struct extendedFileEntry *)bh->b_data; |
1da177e4 | 1353 | |
5e0f0017 | 1354 | if (fe->icbTag.strategyType == cpu_to_le16(4096)) { |
1ab92785 | 1355 | struct buffer_head *ibh; |
1da177e4 | 1356 | |
6d3d5e86 | 1357 | ibh = udf_read_ptagged(inode->i_sb, iloc, 1, &ident); |
1ab92785 | 1358 | if (ident == TAG_IDENT_IE && ibh) { |
5ca4e4be | 1359 | struct kernel_lb_addr loc; |
1ab92785 | 1360 | struct indirectEntry *ie; |
1361 | ||
1362 | ie = (struct indirectEntry *)ibh->b_data; | |
1363 | loc = lelb_to_cpu(ie->indirectICB.extLocation); | |
1364 | ||
c03aa9f6 | 1365 | if (ie->indirectICB.extLength) { |
c03aa9f6 JK |
1366 | brelse(ibh); |
1367 | memcpy(&iinfo->i_location, &loc, | |
1368 | sizeof(struct kernel_lb_addr)); | |
1369 | if (++indirections > UDF_MAX_ICB_NESTING) { | |
1370 | udf_err(inode->i_sb, | |
1371 | "too many ICBs in ICB hierarchy" | |
1372 | " (max %d supported)\n", | |
1373 | UDF_MAX_ICB_NESTING); | |
6d3d5e86 | 1374 | goto out; |
28de7948 | 1375 | } |
6d3d5e86 | 1376 | brelse(bh); |
c03aa9f6 | 1377 | goto reread; |
1da177e4 | 1378 | } |
28de7948 | 1379 | } |
1ab92785 | 1380 | brelse(ibh); |
5e0f0017 | 1381 | } else if (fe->icbTag.strategyType != cpu_to_le16(4)) { |
fcbf7637 | 1382 | udf_err(inode->i_sb, "unsupported strategy type: %u\n", |
78ace70c | 1383 | le16_to_cpu(fe->icbTag.strategyType)); |
6d3d5e86 | 1384 | goto out; |
1da177e4 | 1385 | } |
5e0f0017 | 1386 | if (fe->icbTag.strategyType == cpu_to_le16(4)) |
48d6d8ff | 1387 | iinfo->i_strat4096 = 0; |
5e0f0017 | 1388 | else /* if (fe->icbTag.strategyType == cpu_to_le16(4096)) */ |
48d6d8ff | 1389 | iinfo->i_strat4096 = 1; |
1da177e4 | 1390 | |
48d6d8ff | 1391 | iinfo->i_alloc_type = le16_to_cpu(fe->icbTag.flags) & |
4b11111a | 1392 | ICBTAG_FLAG_AD_MASK; |
d288d958 JK |
1393 | if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_SHORT && |
1394 | iinfo->i_alloc_type != ICBTAG_FLAG_AD_LONG && | |
1395 | iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { | |
1396 | ret = -EIO; | |
1397 | goto out; | |
1398 | } | |
48d6d8ff MS |
1399 | iinfo->i_unique = 0; |
1400 | iinfo->i_lenEAttr = 0; | |
1401 | iinfo->i_lenExtents = 0; | |
1402 | iinfo->i_lenAlloc = 0; | |
1403 | iinfo->i_next_alloc_block = 0; | |
1404 | iinfo->i_next_alloc_goal = 0; | |
5e0f0017 | 1405 | if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_EFE)) { |
48d6d8ff MS |
1406 | iinfo->i_efe = 1; |
1407 | iinfo->i_use = 0; | |
79144954 | 1408 | ret = udf_alloc_i_data(inode, bs - |
6d3d5e86 JK |
1409 | sizeof(struct extendedFileEntry)); |
1410 | if (ret) | |
1411 | goto out; | |
382a2287 | 1412 | memcpy(iinfo->i_data, |
4b11111a | 1413 | bh->b_data + sizeof(struct extendedFileEntry), |
79144954 | 1414 | bs - sizeof(struct extendedFileEntry)); |
5e0f0017 | 1415 | } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_FE)) { |
48d6d8ff MS |
1416 | iinfo->i_efe = 0; |
1417 | iinfo->i_use = 0; | |
79144954 | 1418 | ret = udf_alloc_i_data(inode, bs - sizeof(struct fileEntry)); |
6d3d5e86 JK |
1419 | if (ret) |
1420 | goto out; | |
382a2287 | 1421 | memcpy(iinfo->i_data, |
c0b34438 | 1422 | bh->b_data + sizeof(struct fileEntry), |
79144954 | 1423 | bs - sizeof(struct fileEntry)); |
5e0f0017 | 1424 | } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_USE)) { |
48d6d8ff MS |
1425 | iinfo->i_efe = 0; |
1426 | iinfo->i_use = 1; | |
1427 | iinfo->i_lenAlloc = le32_to_cpu( | |
4b11111a MS |
1428 | ((struct unallocSpaceEntry *)bh->b_data)-> |
1429 | lengthAllocDescs); | |
79144954 | 1430 | ret = udf_alloc_i_data(inode, bs - |
6d3d5e86 JK |
1431 | sizeof(struct unallocSpaceEntry)); |
1432 | if (ret) | |
1433 | goto out; | |
382a2287 | 1434 | memcpy(iinfo->i_data, |
4b11111a | 1435 | bh->b_data + sizeof(struct unallocSpaceEntry), |
79144954 | 1436 | bs - sizeof(struct unallocSpaceEntry)); |
6d3d5e86 | 1437 | return 0; |
1da177e4 LT |
1438 | } |
1439 | ||
6d3d5e86 | 1440 | ret = -EIO; |
c03cad24 | 1441 | read_lock(&sbi->s_cred_lock); |
0c9850f4 JK |
1442 | uid = le32_to_cpu(fe->uid); |
1443 | if (uid == UDF_INVALID_ID || | |
ca76d2d8 | 1444 | UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_SET)) |
0c9850f4 JK |
1445 | inode->i_uid = sbi->s_uid; |
1446 | else | |
1447 | i_uid_write(inode, uid); | |
1da177e4 | 1448 | |
0c9850f4 JK |
1449 | gid = le32_to_cpu(fe->gid); |
1450 | if (gid == UDF_INVALID_ID || | |
ca76d2d8 | 1451 | UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_SET)) |
0c9850f4 JK |
1452 | inode->i_gid = sbi->s_gid; |
1453 | else | |
1454 | i_gid_write(inode, gid); | |
1da177e4 | 1455 | |
7ac9bcd5 | 1456 | if (fe->icbTag.fileType != ICBTAG_FILE_TYPE_DIRECTORY && |
87bc730c | 1457 | sbi->s_fmode != UDF_INVALID_MODE) |
7ac9bcd5 MS |
1458 | inode->i_mode = sbi->s_fmode; |
1459 | else if (fe->icbTag.fileType == ICBTAG_FILE_TYPE_DIRECTORY && | |
87bc730c | 1460 | sbi->s_dmode != UDF_INVALID_MODE) |
7ac9bcd5 MS |
1461 | inode->i_mode = sbi->s_dmode; |
1462 | else | |
1463 | inode->i_mode = udf_convert_permissions(fe); | |
1464 | inode->i_mode &= ~sbi->s_umask; | |
c3367a1b SM |
1465 | iinfo->i_extraPerms = le32_to_cpu(fe->permissions) & ~FE_MAPPED_PERMS; |
1466 | ||
c03cad24 JK |
1467 | read_unlock(&sbi->s_cred_lock); |
1468 | ||
bfe86848 | 1469 | link_count = le16_to_cpu(fe->fileLinkCount); |
4071b913 | 1470 | if (!link_count) { |
6174c2eb JK |
1471 | if (!hidden_inode) { |
1472 | ret = -ESTALE; | |
1473 | goto out; | |
1474 | } | |
1475 | link_count = 1; | |
4071b913 | 1476 | } |
bfe86848 | 1477 | set_nlink(inode, link_count); |
c03cad24 JK |
1478 | |
1479 | inode->i_size = le64_to_cpu(fe->informationLength); | |
1480 | iinfo->i_lenExtents = inode->i_size; | |
1da177e4 | 1481 | |
48d6d8ff | 1482 | if (iinfo->i_efe == 0) { |
1da177e4 | 1483 | inode->i_blocks = le64_to_cpu(fe->logicalBlocksRecorded) << |
28de7948 | 1484 | (inode->i_sb->s_blocksize_bits - 9); |
1da177e4 | 1485 | |
c3b9cecd AB |
1486 | udf_disk_stamp_to_time(&inode->i_atime, fe->accessTime); |
1487 | udf_disk_stamp_to_time(&inode->i_mtime, fe->modificationTime); | |
1488 | udf_disk_stamp_to_time(&inode->i_ctime, fe->attrTime); | |
1da177e4 | 1489 | |
48d6d8ff MS |
1490 | iinfo->i_unique = le64_to_cpu(fe->uniqueID); |
1491 | iinfo->i_lenEAttr = le32_to_cpu(fe->lengthExtendedAttr); | |
1492 | iinfo->i_lenAlloc = le32_to_cpu(fe->lengthAllocDescs); | |
d5e2cf07 | 1493 | iinfo->i_checkpoint = le32_to_cpu(fe->checkpoint); |
ab9a3a73 SM |
1494 | iinfo->i_streamdir = 0; |
1495 | iinfo->i_lenStreams = 0; | |
cb00ea35 | 1496 | } else { |
647bd61a | 1497 | inode->i_blocks = le64_to_cpu(efe->logicalBlocksRecorded) << |
cb00ea35 | 1498 | (inode->i_sb->s_blocksize_bits - 9); |
1da177e4 | 1499 | |
c3b9cecd AB |
1500 | udf_disk_stamp_to_time(&inode->i_atime, efe->accessTime); |
1501 | udf_disk_stamp_to_time(&inode->i_mtime, efe->modificationTime); | |
0220edda | 1502 | udf_disk_stamp_to_time(&iinfo->i_crtime, efe->createTime); |
c3b9cecd | 1503 | udf_disk_stamp_to_time(&inode->i_ctime, efe->attrTime); |
1da177e4 | 1504 | |
48d6d8ff MS |
1505 | iinfo->i_unique = le64_to_cpu(efe->uniqueID); |
1506 | iinfo->i_lenEAttr = le32_to_cpu(efe->lengthExtendedAttr); | |
1507 | iinfo->i_lenAlloc = le32_to_cpu(efe->lengthAllocDescs); | |
d5e2cf07 | 1508 | iinfo->i_checkpoint = le32_to_cpu(efe->checkpoint); |
ab9a3a73 SM |
1509 | |
1510 | /* Named streams */ | |
1511 | iinfo->i_streamdir = (efe->streamDirectoryICB.extLength != 0); | |
1512 | iinfo->i_locStreamdir = | |
1513 | lelb_to_cpu(efe->streamDirectoryICB.extLocation); | |
1514 | iinfo->i_lenStreams = le64_to_cpu(efe->objectSize); | |
1515 | if (iinfo->i_lenStreams >= inode->i_size) | |
1516 | iinfo->i_lenStreams -= inode->i_size; | |
1517 | else | |
1518 | iinfo->i_lenStreams = 0; | |
1da177e4 | 1519 | } |
470cca56 | 1520 | inode->i_generation = iinfo->i_unique; |
1da177e4 | 1521 | |
23b133bd JK |
1522 | /* |
1523 | * Sanity check length of allocation descriptors and extended attrs to | |
1524 | * avoid integer overflows | |
1525 | */ | |
1526 | if (iinfo->i_lenEAttr > bs || iinfo->i_lenAlloc > bs) | |
1527 | goto out; | |
1528 | /* Now do exact checks */ | |
1529 | if (udf_file_entry_alloc_offset(inode) + iinfo->i_lenAlloc > bs) | |
1530 | goto out; | |
e159332b JK |
1531 | /* Sanity checks for files in ICB so that we don't get confused later */ |
1532 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { | |
1533 | /* | |
1534 | * For file in ICB data is stored in allocation descriptor | |
1535 | * so sizes should match | |
1536 | */ | |
1537 | if (iinfo->i_lenAlloc != inode->i_size) | |
1538 | goto out; | |
1539 | /* File in ICB has to fit in there... */ | |
79144954 | 1540 | if (inode->i_size > bs - udf_file_entry_alloc_offset(inode)) |
e159332b JK |
1541 | goto out; |
1542 | } | |
1543 | ||
cb00ea35 CG |
1544 | switch (fe->icbTag.fileType) { |
1545 | case ICBTAG_FILE_TYPE_DIRECTORY: | |
28de7948 CG |
1546 | inode->i_op = &udf_dir_inode_operations; |
1547 | inode->i_fop = &udf_dir_operations; | |
1548 | inode->i_mode |= S_IFDIR; | |
1549 | inc_nlink(inode); | |
1550 | break; | |
cb00ea35 CG |
1551 | case ICBTAG_FILE_TYPE_REALTIME: |
1552 | case ICBTAG_FILE_TYPE_REGULAR: | |
1553 | case ICBTAG_FILE_TYPE_UNDEF: | |
742e1795 | 1554 | case ICBTAG_FILE_TYPE_VAT20: |
48d6d8ff | 1555 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
28de7948 CG |
1556 | inode->i_data.a_ops = &udf_adinicb_aops; |
1557 | else | |
1558 | inode->i_data.a_ops = &udf_aops; | |
1559 | inode->i_op = &udf_file_inode_operations; | |
1560 | inode->i_fop = &udf_file_operations; | |
1561 | inode->i_mode |= S_IFREG; | |
1562 | break; | |
cb00ea35 | 1563 | case ICBTAG_FILE_TYPE_BLOCK: |
28de7948 CG |
1564 | inode->i_mode |= S_IFBLK; |
1565 | break; | |
cb00ea35 | 1566 | case ICBTAG_FILE_TYPE_CHAR: |
28de7948 CG |
1567 | inode->i_mode |= S_IFCHR; |
1568 | break; | |
cb00ea35 | 1569 | case ICBTAG_FILE_TYPE_FIFO: |
28de7948 CG |
1570 | init_special_inode(inode, inode->i_mode | S_IFIFO, 0); |
1571 | break; | |
cb00ea35 | 1572 | case ICBTAG_FILE_TYPE_SOCKET: |
28de7948 CG |
1573 | init_special_inode(inode, inode->i_mode | S_IFSOCK, 0); |
1574 | break; | |
cb00ea35 | 1575 | case ICBTAG_FILE_TYPE_SYMLINK: |
28de7948 | 1576 | inode->i_data.a_ops = &udf_symlink_aops; |
ad4d0532 | 1577 | inode->i_op = &udf_symlink_inode_operations; |
21fc61c7 | 1578 | inode_nohighmem(inode); |
6ff6b2b3 | 1579 | inode->i_mode = S_IFLNK | 0777; |
28de7948 | 1580 | break; |
bfb257a5 JK |
1581 | case ICBTAG_FILE_TYPE_MAIN: |
1582 | udf_debug("METADATA FILE-----\n"); | |
1583 | break; | |
1584 | case ICBTAG_FILE_TYPE_MIRROR: | |
1585 | udf_debug("METADATA MIRROR FILE-----\n"); | |
1586 | break; | |
1587 | case ICBTAG_FILE_TYPE_BITMAP: | |
1588 | udf_debug("METADATA BITMAP FILE-----\n"); | |
1589 | break; | |
cb00ea35 | 1590 | default: |
fcbf7637 | 1591 | udf_err(inode->i_sb, "(ino %lu) failed unknown file type=%u\n", |
78ace70c | 1592 | inode->i_ino, fe->icbTag.fileType); |
6d3d5e86 | 1593 | goto out; |
1da177e4 | 1594 | } |
cb00ea35 | 1595 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { |
4b11111a MS |
1596 | struct deviceSpec *dsea = |
1597 | (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1); | |
cb00ea35 CG |
1598 | if (dsea) { |
1599 | init_special_inode(inode, inode->i_mode, | |
4b11111a MS |
1600 | MKDEV(le32_to_cpu(dsea->majorDeviceIdent), |
1601 | le32_to_cpu(dsea->minorDeviceIdent))); | |
1da177e4 | 1602 | /* Developer ID ??? */ |
4b11111a | 1603 | } else |
6d3d5e86 | 1604 | goto out; |
1da177e4 | 1605 | } |
6d3d5e86 JK |
1606 | ret = 0; |
1607 | out: | |
bb7720a0 | 1608 | brelse(bh); |
6d3d5e86 | 1609 | return ret; |
1da177e4 LT |
1610 | } |
1611 | ||
647bd61a CG |
1612 | static int udf_alloc_i_data(struct inode *inode, size_t size) |
1613 | { | |
48d6d8ff | 1614 | struct udf_inode_info *iinfo = UDF_I(inode); |
382a2287 JK |
1615 | iinfo->i_data = kmalloc(size, GFP_KERNEL); |
1616 | if (!iinfo->i_data) | |
647bd61a | 1617 | return -ENOMEM; |
647bd61a CG |
1618 | return 0; |
1619 | } | |
1620 | ||
faa17292 | 1621 | static umode_t udf_convert_permissions(struct fileEntry *fe) |
1da177e4 | 1622 | { |
faa17292 | 1623 | umode_t mode; |
1da177e4 LT |
1624 | uint32_t permissions; |
1625 | uint32_t flags; | |
1626 | ||
1627 | permissions = le32_to_cpu(fe->permissions); | |
1628 | flags = le16_to_cpu(fe->icbTag.flags); | |
1629 | ||
6ff6b2b3 FF |
1630 | mode = ((permissions) & 0007) | |
1631 | ((permissions >> 2) & 0070) | | |
1632 | ((permissions >> 4) & 0700) | | |
4b11111a MS |
1633 | ((flags & ICBTAG_FLAG_SETUID) ? S_ISUID : 0) | |
1634 | ((flags & ICBTAG_FLAG_SETGID) ? S_ISGID : 0) | | |
1635 | ((flags & ICBTAG_FLAG_STICKY) ? S_ISVTX : 0); | |
1da177e4 LT |
1636 | |
1637 | return mode; | |
1638 | } | |
1639 | ||
c3367a1b SM |
1640 | void udf_update_extra_perms(struct inode *inode, umode_t mode) |
1641 | { | |
1642 | struct udf_inode_info *iinfo = UDF_I(inode); | |
1643 | ||
1644 | /* | |
1645 | * UDF 2.01 sec. 3.3.3.3 Note 2: | |
1646 | * In Unix, delete permission tracks write | |
1647 | */ | |
1648 | iinfo->i_extraPerms &= ~FE_DELETE_PERMS; | |
1649 | if (mode & 0200) | |
1650 | iinfo->i_extraPerms |= FE_PERM_U_DELETE; | |
1651 | if (mode & 0020) | |
1652 | iinfo->i_extraPerms |= FE_PERM_G_DELETE; | |
1653 | if (mode & 0002) | |
1654 | iinfo->i_extraPerms |= FE_PERM_O_DELETE; | |
1655 | } | |
1656 | ||
a9185b41 | 1657 | int udf_write_inode(struct inode *inode, struct writeback_control *wbc) |
1da177e4 | 1658 | { |
49521de1 | 1659 | return udf_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL); |
1da177e4 LT |
1660 | } |
1661 | ||
49521de1 | 1662 | static int udf_sync_inode(struct inode *inode) |
1da177e4 LT |
1663 | { |
1664 | return udf_update_inode(inode, 1); | |
1665 | } | |
1666 | ||
c3b9cecd | 1667 | static void udf_adjust_time(struct udf_inode_info *iinfo, struct timespec64 time) |
7ed0fbd7 FF |
1668 | { |
1669 | if (iinfo->i_crtime.tv_sec > time.tv_sec || | |
1670 | (iinfo->i_crtime.tv_sec == time.tv_sec && | |
1671 | iinfo->i_crtime.tv_nsec > time.tv_nsec)) | |
1672 | iinfo->i_crtime = time; | |
1673 | } | |
1674 | ||
cb00ea35 | 1675 | static int udf_update_inode(struct inode *inode, int do_sync) |
1da177e4 LT |
1676 | { |
1677 | struct buffer_head *bh = NULL; | |
1678 | struct fileEntry *fe; | |
1679 | struct extendedFileEntry *efe; | |
b2527bfa | 1680 | uint64_t lb_recorded; |
1da177e4 LT |
1681 | uint32_t udfperms; |
1682 | uint16_t icbflags; | |
1683 | uint16_t crclen; | |
1da177e4 | 1684 | int err = 0; |
6c79e987 | 1685 | struct udf_sb_info *sbi = UDF_SB(inode->i_sb); |
4b11111a | 1686 | unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; |
48d6d8ff | 1687 | struct udf_inode_info *iinfo = UDF_I(inode); |
1da177e4 | 1688 | |
5833ded9 JK |
1689 | bh = udf_tgetblk(inode->i_sb, |
1690 | udf_get_lb_pblock(inode->i_sb, &iinfo->i_location, 0)); | |
cb00ea35 | 1691 | if (!bh) { |
aae917cd | 1692 | udf_debug("getblk failure\n"); |
0fd2ba36 | 1693 | return -EIO; |
1da177e4 LT |
1694 | } |
1695 | ||
aae917cd JK |
1696 | lock_buffer(bh); |
1697 | memset(bh->b_data, 0, inode->i_sb->s_blocksize); | |
1da177e4 LT |
1698 | fe = (struct fileEntry *)bh->b_data; |
1699 | efe = (struct extendedFileEntry *)bh->b_data; | |
1700 | ||
aae917cd | 1701 | if (iinfo->i_use) { |
1da177e4 | 1702 | struct unallocSpaceEntry *use = |
28de7948 | 1703 | (struct unallocSpaceEntry *)bh->b_data; |
1da177e4 | 1704 | |
48d6d8ff | 1705 | use->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc); |
4b11111a | 1706 | memcpy(bh->b_data + sizeof(struct unallocSpaceEntry), |
382a2287 | 1707 | iinfo->i_data, inode->i_sb->s_blocksize - |
4b11111a | 1708 | sizeof(struct unallocSpaceEntry)); |
aae917cd | 1709 | use->descTag.tagIdent = cpu_to_le16(TAG_IDENT_USE); |
70f19f58 | 1710 | crclen = sizeof(struct unallocSpaceEntry); |
1da177e4 | 1711 | |
70f19f58 | 1712 | goto finish; |
1da177e4 LT |
1713 | } |
1714 | ||
4d6660eb | 1715 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_FORGET)) |
0c9850f4 | 1716 | fe->uid = cpu_to_le32(UDF_INVALID_ID); |
cb00ea35 | 1717 | else |
c2ba138a | 1718 | fe->uid = cpu_to_le32(i_uid_read(inode)); |
1da177e4 | 1719 | |
4d6660eb | 1720 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_FORGET)) |
0c9850f4 | 1721 | fe->gid = cpu_to_le32(UDF_INVALID_ID); |
cb00ea35 | 1722 | else |
c2ba138a | 1723 | fe->gid = cpu_to_le32(i_gid_read(inode)); |
1da177e4 | 1724 | |
6ff6b2b3 FF |
1725 | udfperms = ((inode->i_mode & 0007)) | |
1726 | ((inode->i_mode & 0070) << 2) | | |
1727 | ((inode->i_mode & 0700) << 4); | |
1da177e4 | 1728 | |
c3367a1b | 1729 | udfperms |= iinfo->i_extraPerms; |
1da177e4 LT |
1730 | fe->permissions = cpu_to_le32(udfperms); |
1731 | ||
8a70ee33 | 1732 | if (S_ISDIR(inode->i_mode) && inode->i_nlink > 0) |
1da177e4 LT |
1733 | fe->fileLinkCount = cpu_to_le16(inode->i_nlink - 1); |
1734 | else | |
1735 | fe->fileLinkCount = cpu_to_le16(inode->i_nlink); | |
1736 | ||
1737 | fe->informationLength = cpu_to_le64(inode->i_size); | |
1738 | ||
cb00ea35 | 1739 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { |
5ca4e4be | 1740 | struct regid *eid; |
28de7948 CG |
1741 | struct deviceSpec *dsea = |
1742 | (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1); | |
cb00ea35 | 1743 | if (!dsea) { |
1da177e4 | 1744 | dsea = (struct deviceSpec *) |
28de7948 CG |
1745 | udf_add_extendedattr(inode, |
1746 | sizeof(struct deviceSpec) + | |
5ca4e4be | 1747 | sizeof(struct regid), 12, 0x3); |
1da177e4 LT |
1748 | dsea->attrType = cpu_to_le32(12); |
1749 | dsea->attrSubtype = 1; | |
4b11111a MS |
1750 | dsea->attrLength = cpu_to_le32( |
1751 | sizeof(struct deviceSpec) + | |
5ca4e4be PE |
1752 | sizeof(struct regid)); |
1753 | dsea->impUseLength = cpu_to_le32(sizeof(struct regid)); | |
1da177e4 | 1754 | } |
5ca4e4be | 1755 | eid = (struct regid *)dsea->impUse; |
033c9da0 | 1756 | memset(eid, 0, sizeof(*eid)); |
1da177e4 LT |
1757 | strcpy(eid->ident, UDF_ID_DEVELOPER); |
1758 | eid->identSuffix[0] = UDF_OS_CLASS_UNIX; | |
1759 | eid->identSuffix[1] = UDF_OS_ID_LINUX; | |
1760 | dsea->majorDeviceIdent = cpu_to_le32(imajor(inode)); | |
1761 | dsea->minorDeviceIdent = cpu_to_le32(iminor(inode)); | |
1762 | } | |
1763 | ||
b2527bfa SN |
1764 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1765 | lb_recorded = 0; /* No extents => no blocks! */ | |
1766 | else | |
1767 | lb_recorded = | |
1768 | (inode->i_blocks + (1 << (blocksize_bits - 9)) - 1) >> | |
1769 | (blocksize_bits - 9); | |
1770 | ||
48d6d8ff | 1771 | if (iinfo->i_efe == 0) { |
c0b34438 | 1772 | memcpy(bh->b_data + sizeof(struct fileEntry), |
382a2287 | 1773 | iinfo->i_data, |
cb00ea35 | 1774 | inode->i_sb->s_blocksize - sizeof(struct fileEntry)); |
b2527bfa | 1775 | fe->logicalBlocksRecorded = cpu_to_le64(lb_recorded); |
1da177e4 | 1776 | |
c3b9cecd AB |
1777 | udf_time_to_disk_stamp(&fe->accessTime, inode->i_atime); |
1778 | udf_time_to_disk_stamp(&fe->modificationTime, inode->i_mtime); | |
1779 | udf_time_to_disk_stamp(&fe->attrTime, inode->i_ctime); | |
5ca4e4be | 1780 | memset(&(fe->impIdent), 0, sizeof(struct regid)); |
1da177e4 LT |
1781 | strcpy(fe->impIdent.ident, UDF_ID_DEVELOPER); |
1782 | fe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; | |
1783 | fe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; | |
48d6d8ff MS |
1784 | fe->uniqueID = cpu_to_le64(iinfo->i_unique); |
1785 | fe->lengthExtendedAttr = cpu_to_le32(iinfo->i_lenEAttr); | |
1786 | fe->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc); | |
d5e2cf07 | 1787 | fe->checkpoint = cpu_to_le32(iinfo->i_checkpoint); |
1da177e4 LT |
1788 | fe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_FE); |
1789 | crclen = sizeof(struct fileEntry); | |
cb00ea35 | 1790 | } else { |
4b11111a | 1791 | memcpy(bh->b_data + sizeof(struct extendedFileEntry), |
382a2287 | 1792 | iinfo->i_data, |
4b11111a MS |
1793 | inode->i_sb->s_blocksize - |
1794 | sizeof(struct extendedFileEntry)); | |
ab9a3a73 SM |
1795 | efe->objectSize = |
1796 | cpu_to_le64(inode->i_size + iinfo->i_lenStreams); | |
b2527bfa | 1797 | efe->logicalBlocksRecorded = cpu_to_le64(lb_recorded); |
1da177e4 | 1798 | |
ab9a3a73 SM |
1799 | if (iinfo->i_streamdir) { |
1800 | struct long_ad *icb_lad = &efe->streamDirectoryICB; | |
1801 | ||
1802 | icb_lad->extLocation = | |
1803 | cpu_to_lelb(iinfo->i_locStreamdir); | |
1804 | icb_lad->extLength = | |
1805 | cpu_to_le32(inode->i_sb->s_blocksize); | |
1806 | } | |
1807 | ||
c3b9cecd AB |
1808 | udf_adjust_time(iinfo, inode->i_atime); |
1809 | udf_adjust_time(iinfo, inode->i_mtime); | |
1810 | udf_adjust_time(iinfo, inode->i_ctime); | |
1da177e4 | 1811 | |
c3b9cecd AB |
1812 | udf_time_to_disk_stamp(&efe->accessTime, inode->i_atime); |
1813 | udf_time_to_disk_stamp(&efe->modificationTime, inode->i_mtime); | |
56774805 | 1814 | udf_time_to_disk_stamp(&efe->createTime, iinfo->i_crtime); |
c3b9cecd | 1815 | udf_time_to_disk_stamp(&efe->attrTime, inode->i_ctime); |
1da177e4 | 1816 | |
033c9da0 | 1817 | memset(&(efe->impIdent), 0, sizeof(efe->impIdent)); |
1da177e4 LT |
1818 | strcpy(efe->impIdent.ident, UDF_ID_DEVELOPER); |
1819 | efe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; | |
1820 | efe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; | |
48d6d8ff MS |
1821 | efe->uniqueID = cpu_to_le64(iinfo->i_unique); |
1822 | efe->lengthExtendedAttr = cpu_to_le32(iinfo->i_lenEAttr); | |
1823 | efe->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc); | |
d5e2cf07 | 1824 | efe->checkpoint = cpu_to_le32(iinfo->i_checkpoint); |
1da177e4 LT |
1825 | efe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_EFE); |
1826 | crclen = sizeof(struct extendedFileEntry); | |
1827 | } | |
70f19f58 SM |
1828 | |
1829 | finish: | |
48d6d8ff | 1830 | if (iinfo->i_strat4096) { |
1da177e4 LT |
1831 | fe->icbTag.strategyType = cpu_to_le16(4096); |
1832 | fe->icbTag.strategyParameter = cpu_to_le16(1); | |
1833 | fe->icbTag.numEntries = cpu_to_le16(2); | |
cb00ea35 | 1834 | } else { |
1da177e4 LT |
1835 | fe->icbTag.strategyType = cpu_to_le16(4); |
1836 | fe->icbTag.numEntries = cpu_to_le16(1); | |
1837 | } | |
1838 | ||
70f19f58 SM |
1839 | if (iinfo->i_use) |
1840 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_USE; | |
1841 | else if (S_ISDIR(inode->i_mode)) | |
1da177e4 LT |
1842 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_DIRECTORY; |
1843 | else if (S_ISREG(inode->i_mode)) | |
1844 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_REGULAR; | |
1845 | else if (S_ISLNK(inode->i_mode)) | |
1846 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_SYMLINK; | |
1847 | else if (S_ISBLK(inode->i_mode)) | |
1848 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_BLOCK; | |
1849 | else if (S_ISCHR(inode->i_mode)) | |
1850 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_CHAR; | |
1851 | else if (S_ISFIFO(inode->i_mode)) | |
1852 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_FIFO; | |
1853 | else if (S_ISSOCK(inode->i_mode)) | |
1854 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_SOCKET; | |
1855 | ||
48d6d8ff | 1856 | icbflags = iinfo->i_alloc_type | |
28de7948 CG |
1857 | ((inode->i_mode & S_ISUID) ? ICBTAG_FLAG_SETUID : 0) | |
1858 | ((inode->i_mode & S_ISGID) ? ICBTAG_FLAG_SETGID : 0) | | |
1859 | ((inode->i_mode & S_ISVTX) ? ICBTAG_FLAG_STICKY : 0) | | |
1860 | (le16_to_cpu(fe->icbTag.flags) & | |
1861 | ~(ICBTAG_FLAG_AD_MASK | ICBTAG_FLAG_SETUID | | |
1862 | ICBTAG_FLAG_SETGID | ICBTAG_FLAG_STICKY)); | |
1da177e4 LT |
1863 | |
1864 | fe->icbTag.flags = cpu_to_le16(icbflags); | |
6c79e987 | 1865 | if (sbi->s_udfrev >= 0x0200) |
1da177e4 LT |
1866 | fe->descTag.descVersion = cpu_to_le16(3); |
1867 | else | |
1868 | fe->descTag.descVersion = cpu_to_le16(2); | |
6c79e987 | 1869 | fe->descTag.tagSerialNum = cpu_to_le16(sbi->s_serial_number); |
4b11111a | 1870 | fe->descTag.tagLocation = cpu_to_le32( |
48d6d8ff | 1871 | iinfo->i_location.logicalBlockNum); |
aae917cd | 1872 | crclen += iinfo->i_lenEAttr + iinfo->i_lenAlloc - sizeof(struct tag); |
1da177e4 | 1873 | fe->descTag.descCRCLength = cpu_to_le16(crclen); |
5ca4e4be | 1874 | fe->descTag.descCRC = cpu_to_le16(crc_itu_t(0, (char *)fe + sizeof(struct tag), |
f845fced | 1875 | crclen)); |
3f2587bb | 1876 | fe->descTag.tagChecksum = udf_tag_checksum(&fe->descTag); |
1da177e4 | 1877 | |
5833ded9 | 1878 | set_buffer_uptodate(bh); |
aae917cd JK |
1879 | unlock_buffer(bh); |
1880 | ||
1da177e4 LT |
1881 | /* write the data blocks */ |
1882 | mark_buffer_dirty(bh); | |
cb00ea35 | 1883 | if (do_sync) { |
1da177e4 | 1884 | sync_dirty_buffer(bh); |
aae917cd | 1885 | if (buffer_write_io_error(bh)) { |
78ace70c JP |
1886 | udf_warn(inode->i_sb, "IO error syncing udf inode [%08lx]\n", |
1887 | inode->i_ino); | |
1da177e4 LT |
1888 | err = -EIO; |
1889 | } | |
1890 | } | |
3bf25cb4 | 1891 | brelse(bh); |
28de7948 | 1892 | |
1da177e4 LT |
1893 | return err; |
1894 | } | |
1895 | ||
6174c2eb JK |
1896 | struct inode *__udf_iget(struct super_block *sb, struct kernel_lb_addr *ino, |
1897 | bool hidden_inode) | |
1da177e4 LT |
1898 | { |
1899 | unsigned long block = udf_get_lb_pblock(sb, ino, 0); | |
1900 | struct inode *inode = iget_locked(sb, block); | |
6d3d5e86 | 1901 | int err; |
1da177e4 LT |
1902 | |
1903 | if (!inode) | |
6d3d5e86 | 1904 | return ERR_PTR(-ENOMEM); |
1da177e4 | 1905 | |
6d3d5e86 JK |
1906 | if (!(inode->i_state & I_NEW)) |
1907 | return inode; | |
1da177e4 | 1908 | |
6d3d5e86 | 1909 | memcpy(&UDF_I(inode)->i_location, ino, sizeof(struct kernel_lb_addr)); |
6174c2eb | 1910 | err = udf_read_inode(inode, hidden_inode); |
6d3d5e86 JK |
1911 | if (err < 0) { |
1912 | iget_failed(inode); | |
1913 | return ERR_PTR(err); | |
1da177e4 | 1914 | } |
6d3d5e86 | 1915 | unlock_new_inode(inode); |
1da177e4 LT |
1916 | |
1917 | return inode; | |
1da177e4 LT |
1918 | } |
1919 | ||
b490bdd6 | 1920 | int udf_setup_indirect_aext(struct inode *inode, udf_pblk_t block, |
fcea62ba | 1921 | struct extent_position *epos) |
1da177e4 | 1922 | { |
fcea62ba JK |
1923 | struct super_block *sb = inode->i_sb; |
1924 | struct buffer_head *bh; | |
1da177e4 | 1925 | struct allocExtDesc *aed; |
fcea62ba JK |
1926 | struct extent_position nepos; |
1927 | struct kernel_lb_addr neloc; | |
1928 | int ver, adsize; | |
1da177e4 | 1929 | |
fcea62ba JK |
1930 | if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
1931 | adsize = sizeof(struct short_ad); | |
1932 | else if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_LONG) | |
1933 | adsize = sizeof(struct long_ad); | |
1da177e4 | 1934 | else |
4f1b1519 | 1935 | return -EIO; |
fcea62ba JK |
1936 | |
1937 | neloc.logicalBlockNum = block; | |
1938 | neloc.partitionReferenceNum = epos->block.partitionReferenceNum; | |
1939 | ||
1940 | bh = udf_tgetblk(sb, udf_get_lb_pblock(sb, &neloc, 0)); | |
1941 | if (!bh) | |
1942 | return -EIO; | |
1943 | lock_buffer(bh); | |
1944 | memset(bh->b_data, 0x00, sb->s_blocksize); | |
1945 | set_buffer_uptodate(bh); | |
1946 | unlock_buffer(bh); | |
1947 | mark_buffer_dirty_inode(bh, inode); | |
1948 | ||
1949 | aed = (struct allocExtDesc *)(bh->b_data); | |
1950 | if (!UDF_QUERY_FLAG(sb, UDF_FLAG_STRICT)) { | |
1951 | aed->previousAllocExtLocation = | |
1952 | cpu_to_le32(epos->block.logicalBlockNum); | |
1953 | } | |
1954 | aed->lengthAllocDescs = cpu_to_le32(0); | |
1955 | if (UDF_SB(sb)->s_udfrev >= 0x0200) | |
1956 | ver = 3; | |
1da177e4 | 1957 | else |
fcea62ba JK |
1958 | ver = 2; |
1959 | udf_new_tag(bh->b_data, TAG_IDENT_AED, ver, 1, block, | |
1960 | sizeof(struct tag)); | |
1961 | ||
1962 | nepos.block = neloc; | |
1963 | nepos.offset = sizeof(struct allocExtDesc); | |
1964 | nepos.bh = bh; | |
1965 | ||
1966 | /* | |
1967 | * Do we have to copy current last extent to make space for indirect | |
1968 | * one? | |
1969 | */ | |
1970 | if (epos->offset + adsize > sb->s_blocksize) { | |
1971 | struct kernel_lb_addr cp_loc; | |
1972 | uint32_t cp_len; | |
1973 | int cp_type; | |
1974 | ||
1975 | epos->offset -= adsize; | |
1976 | cp_type = udf_current_aext(inode, epos, &cp_loc, &cp_len, 0); | |
1977 | cp_len |= ((uint32_t)cp_type) << 30; | |
1978 | ||
1979 | __udf_add_aext(inode, &nepos, &cp_loc, cp_len, 1); | |
1980 | udf_write_aext(inode, epos, &nepos.block, | |
800552ce | 1981 | sb->s_blocksize | EXT_NEXT_EXTENT_ALLOCDESCS, 0); |
fcea62ba JK |
1982 | } else { |
1983 | __udf_add_aext(inode, epos, &nepos.block, | |
800552ce | 1984 | sb->s_blocksize | EXT_NEXT_EXTENT_ALLOCDESCS, 0); |
fcea62ba JK |
1985 | } |
1986 | ||
1987 | brelse(epos->bh); | |
1988 | *epos = nepos; | |
1989 | ||
1990 | return 0; | |
1991 | } | |
1992 | ||
1993 | /* | |
1994 | * Append extent at the given position - should be the first free one in inode | |
1995 | * / indirect extent. This function assumes there is enough space in the inode | |
1996 | * or indirect extent. Use udf_add_aext() if you didn't check for this before. | |
1997 | */ | |
1998 | int __udf_add_aext(struct inode *inode, struct extent_position *epos, | |
1999 | struct kernel_lb_addr *eloc, uint32_t elen, int inc) | |
2000 | { | |
2001 | struct udf_inode_info *iinfo = UDF_I(inode); | |
2002 | struct allocExtDesc *aed; | |
2003 | int adsize; | |
1da177e4 | 2004 | |
48d6d8ff | 2005 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
5ca4e4be | 2006 | adsize = sizeof(struct short_ad); |
48d6d8ff | 2007 | else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
5ca4e4be | 2008 | adsize = sizeof(struct long_ad); |
1da177e4 | 2009 | else |
7e49b6f2 | 2010 | return -EIO; |
1da177e4 | 2011 | |
fcea62ba JK |
2012 | if (!epos->bh) { |
2013 | WARN_ON(iinfo->i_lenAlloc != | |
2014 | epos->offset - udf_file_entry_alloc_offset(inode)); | |
2015 | } else { | |
2016 | aed = (struct allocExtDesc *)epos->bh->b_data; | |
2017 | WARN_ON(le32_to_cpu(aed->lengthAllocDescs) != | |
2018 | epos->offset - sizeof(struct allocExtDesc)); | |
2019 | WARN_ON(epos->offset + adsize > inode->i_sb->s_blocksize); | |
1da177e4 LT |
2020 | } |
2021 | ||
7e49b6f2 | 2022 | udf_write_aext(inode, epos, eloc, elen, inc); |
1da177e4 | 2023 | |
cb00ea35 | 2024 | if (!epos->bh) { |
48d6d8ff | 2025 | iinfo->i_lenAlloc += adsize; |
1da177e4 | 2026 | mark_inode_dirty(inode); |
cb00ea35 | 2027 | } else { |
ff116fc8 | 2028 | aed = (struct allocExtDesc *)epos->bh->b_data; |
c2104fda | 2029 | le32_add_cpu(&aed->lengthAllocDescs, adsize); |
4b11111a MS |
2030 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
2031 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) | |
2032 | udf_update_tag(epos->bh->b_data, | |
2033 | epos->offset + (inc ? 0 : adsize)); | |
1da177e4 | 2034 | else |
4b11111a MS |
2035 | udf_update_tag(epos->bh->b_data, |
2036 | sizeof(struct allocExtDesc)); | |
ff116fc8 | 2037 | mark_buffer_dirty_inode(epos->bh, inode); |
1da177e4 LT |
2038 | } |
2039 | ||
7e49b6f2 | 2040 | return 0; |
1da177e4 LT |
2041 | } |
2042 | ||
fcea62ba JK |
2043 | /* |
2044 | * Append extent at given position - should be the first free one in inode | |
2045 | * / indirect extent. Takes care of allocating and linking indirect blocks. | |
2046 | */ | |
2047 | int udf_add_aext(struct inode *inode, struct extent_position *epos, | |
2048 | struct kernel_lb_addr *eloc, uint32_t elen, int inc) | |
2049 | { | |
2050 | int adsize; | |
2051 | struct super_block *sb = inode->i_sb; | |
2052 | ||
2053 | if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_SHORT) | |
2054 | adsize = sizeof(struct short_ad); | |
2055 | else if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_LONG) | |
2056 | adsize = sizeof(struct long_ad); | |
2057 | else | |
2058 | return -EIO; | |
2059 | ||
2060 | if (epos->offset + (2 * adsize) > sb->s_blocksize) { | |
2061 | int err; | |
b490bdd6 | 2062 | udf_pblk_t new_block; |
fcea62ba JK |
2063 | |
2064 | new_block = udf_new_block(sb, NULL, | |
2065 | epos->block.partitionReferenceNum, | |
2066 | epos->block.logicalBlockNum, &err); | |
2067 | if (!new_block) | |
2068 | return -ENOSPC; | |
2069 | ||
2070 | err = udf_setup_indirect_aext(inode, new_block, epos); | |
2071 | if (err) | |
2072 | return err; | |
2073 | } | |
2074 | ||
2075 | return __udf_add_aext(inode, epos, eloc, elen, inc); | |
2076 | } | |
2077 | ||
7e49b6f2 JK |
2078 | void udf_write_aext(struct inode *inode, struct extent_position *epos, |
2079 | struct kernel_lb_addr *eloc, uint32_t elen, int inc) | |
1da177e4 LT |
2080 | { |
2081 | int adsize; | |
2082 | uint8_t *ptr; | |
5ca4e4be PE |
2083 | struct short_ad *sad; |
2084 | struct long_ad *lad; | |
48d6d8ff | 2085 | struct udf_inode_info *iinfo = UDF_I(inode); |
1da177e4 | 2086 | |
ff116fc8 | 2087 | if (!epos->bh) |
382a2287 | 2088 | ptr = iinfo->i_data + epos->offset - |
4b11111a | 2089 | udf_file_entry_alloc_offset(inode) + |
48d6d8ff | 2090 | iinfo->i_lenEAttr; |
1da177e4 | 2091 | else |
ff116fc8 | 2092 | ptr = epos->bh->b_data + epos->offset; |
1da177e4 | 2093 | |
48d6d8ff | 2094 | switch (iinfo->i_alloc_type) { |
cb00ea35 | 2095 | case ICBTAG_FLAG_AD_SHORT: |
5ca4e4be | 2096 | sad = (struct short_ad *)ptr; |
28de7948 | 2097 | sad->extLength = cpu_to_le32(elen); |
97e961fd | 2098 | sad->extPosition = cpu_to_le32(eloc->logicalBlockNum); |
5ca4e4be | 2099 | adsize = sizeof(struct short_ad); |
28de7948 | 2100 | break; |
cb00ea35 | 2101 | case ICBTAG_FLAG_AD_LONG: |
5ca4e4be | 2102 | lad = (struct long_ad *)ptr; |
28de7948 | 2103 | lad->extLength = cpu_to_le32(elen); |
97e961fd | 2104 | lad->extLocation = cpu_to_lelb(*eloc); |
28de7948 | 2105 | memset(lad->impUse, 0x00, sizeof(lad->impUse)); |
5ca4e4be | 2106 | adsize = sizeof(struct long_ad); |
28de7948 | 2107 | break; |
cb00ea35 | 2108 | default: |
7e49b6f2 | 2109 | return; |
1da177e4 LT |
2110 | } |
2111 | ||
cb00ea35 | 2112 | if (epos->bh) { |
28de7948 | 2113 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
6c79e987 | 2114 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) { |
4b11111a MS |
2115 | struct allocExtDesc *aed = |
2116 | (struct allocExtDesc *)epos->bh->b_data; | |
ff116fc8 | 2117 | udf_update_tag(epos->bh->b_data, |
4b11111a MS |
2118 | le32_to_cpu(aed->lengthAllocDescs) + |
2119 | sizeof(struct allocExtDesc)); | |
1da177e4 | 2120 | } |
ff116fc8 | 2121 | mark_buffer_dirty_inode(epos->bh, inode); |
28de7948 | 2122 | } else { |
1da177e4 | 2123 | mark_inode_dirty(inode); |
28de7948 | 2124 | } |
1da177e4 LT |
2125 | |
2126 | if (inc) | |
ff116fc8 | 2127 | epos->offset += adsize; |
1da177e4 LT |
2128 | } |
2129 | ||
b0918d9f VN |
2130 | /* |
2131 | * Only 1 indirect extent in a row really makes sense but allow upto 16 in case | |
2132 | * someone does some weird stuff. | |
2133 | */ | |
2134 | #define UDF_MAX_INDIR_EXTS 16 | |
2135 | ||
4b11111a | 2136 | int8_t udf_next_aext(struct inode *inode, struct extent_position *epos, |
5ca4e4be | 2137 | struct kernel_lb_addr *eloc, uint32_t *elen, int inc) |
1da177e4 LT |
2138 | { |
2139 | int8_t etype; | |
b0918d9f | 2140 | unsigned int indirections = 0; |
1da177e4 | 2141 | |
ff116fc8 | 2142 | while ((etype = udf_current_aext(inode, epos, eloc, elen, inc)) == |
800552ce | 2143 | (EXT_NEXT_EXTENT_ALLOCDESCS >> 30)) { |
b490bdd6 | 2144 | udf_pblk_t block; |
b0918d9f VN |
2145 | |
2146 | if (++indirections > UDF_MAX_INDIR_EXTS) { | |
2147 | udf_err(inode->i_sb, | |
2148 | "too many indirect extents in inode %lu\n", | |
2149 | inode->i_ino); | |
2150 | return -1; | |
2151 | } | |
2152 | ||
ff116fc8 JK |
2153 | epos->block = *eloc; |
2154 | epos->offset = sizeof(struct allocExtDesc); | |
3bf25cb4 | 2155 | brelse(epos->bh); |
97e961fd | 2156 | block = udf_get_lb_pblock(inode->i_sb, &epos->block, 0); |
4b11111a MS |
2157 | epos->bh = udf_tread(inode->i_sb, block); |
2158 | if (!epos->bh) { | |
fcbf7637 | 2159 | udf_debug("reading block %u failed!\n", block); |
1da177e4 LT |
2160 | return -1; |
2161 | } | |
2162 | } | |
2163 | ||
2164 | return etype; | |
2165 | } | |
2166 | ||
4b11111a | 2167 | int8_t udf_current_aext(struct inode *inode, struct extent_position *epos, |
5ca4e4be | 2168 | struct kernel_lb_addr *eloc, uint32_t *elen, int inc) |
1da177e4 LT |
2169 | { |
2170 | int alen; | |
2171 | int8_t etype; | |
2172 | uint8_t *ptr; | |
5ca4e4be PE |
2173 | struct short_ad *sad; |
2174 | struct long_ad *lad; | |
48d6d8ff | 2175 | struct udf_inode_info *iinfo = UDF_I(inode); |
28de7948 | 2176 | |
cb00ea35 | 2177 | if (!epos->bh) { |
ff116fc8 JK |
2178 | if (!epos->offset) |
2179 | epos->offset = udf_file_entry_alloc_offset(inode); | |
382a2287 | 2180 | ptr = iinfo->i_data + epos->offset - |
4b11111a | 2181 | udf_file_entry_alloc_offset(inode) + |
48d6d8ff | 2182 | iinfo->i_lenEAttr; |
4b11111a | 2183 | alen = udf_file_entry_alloc_offset(inode) + |
48d6d8ff | 2184 | iinfo->i_lenAlloc; |
cb00ea35 | 2185 | } else { |
ff116fc8 JK |
2186 | if (!epos->offset) |
2187 | epos->offset = sizeof(struct allocExtDesc); | |
2188 | ptr = epos->bh->b_data + epos->offset; | |
28de7948 | 2189 | alen = sizeof(struct allocExtDesc) + |
4b11111a MS |
2190 | le32_to_cpu(((struct allocExtDesc *)epos->bh->b_data)-> |
2191 | lengthAllocDescs); | |
1da177e4 LT |
2192 | } |
2193 | ||
48d6d8ff | 2194 | switch (iinfo->i_alloc_type) { |
cb00ea35 | 2195 | case ICBTAG_FLAG_AD_SHORT: |
4b11111a MS |
2196 | sad = udf_get_fileshortad(ptr, alen, &epos->offset, inc); |
2197 | if (!sad) | |
28de7948 CG |
2198 | return -1; |
2199 | etype = le32_to_cpu(sad->extLength) >> 30; | |
2200 | eloc->logicalBlockNum = le32_to_cpu(sad->extPosition); | |
4b11111a | 2201 | eloc->partitionReferenceNum = |
48d6d8ff | 2202 | iinfo->i_location.partitionReferenceNum; |
28de7948 CG |
2203 | *elen = le32_to_cpu(sad->extLength) & UDF_EXTENT_LENGTH_MASK; |
2204 | break; | |
cb00ea35 | 2205 | case ICBTAG_FLAG_AD_LONG: |
4b11111a MS |
2206 | lad = udf_get_filelongad(ptr, alen, &epos->offset, inc); |
2207 | if (!lad) | |
1da177e4 | 2208 | return -1; |
28de7948 CG |
2209 | etype = le32_to_cpu(lad->extLength) >> 30; |
2210 | *eloc = lelb_to_cpu(lad->extLocation); | |
2211 | *elen = le32_to_cpu(lad->extLength) & UDF_EXTENT_LENGTH_MASK; | |
2212 | break; | |
2213 | default: | |
fcbf7637 | 2214 | udf_debug("alloc_type = %u unsupported\n", iinfo->i_alloc_type); |
28de7948 | 2215 | return -1; |
1da177e4 LT |
2216 | } |
2217 | ||
2218 | return etype; | |
2219 | } | |
2220 | ||
28de7948 | 2221 | static int8_t udf_insert_aext(struct inode *inode, struct extent_position epos, |
5ca4e4be | 2222 | struct kernel_lb_addr neloc, uint32_t nelen) |
1da177e4 | 2223 | { |
5ca4e4be | 2224 | struct kernel_lb_addr oeloc; |
1da177e4 LT |
2225 | uint32_t oelen; |
2226 | int8_t etype; | |
2227 | ||
ff116fc8 | 2228 | if (epos.bh) |
3bf25cb4 | 2229 | get_bh(epos.bh); |
1da177e4 | 2230 | |
cb00ea35 | 2231 | while ((etype = udf_next_aext(inode, &epos, &oeloc, &oelen, 0)) != -1) { |
97e961fd | 2232 | udf_write_aext(inode, &epos, &neloc, nelen, 1); |
1da177e4 LT |
2233 | neloc = oeloc; |
2234 | nelen = (etype << 30) | oelen; | |
2235 | } | |
97e961fd | 2236 | udf_add_aext(inode, &epos, &neloc, nelen, 1); |
3bf25cb4 | 2237 | brelse(epos.bh); |
28de7948 | 2238 | |
1da177e4 LT |
2239 | return (nelen >> 30); |
2240 | } | |
2241 | ||
6c1e4d06 | 2242 | int8_t udf_delete_aext(struct inode *inode, struct extent_position epos) |
1da177e4 | 2243 | { |
ff116fc8 JK |
2244 | struct extent_position oepos; |
2245 | int adsize; | |
1da177e4 LT |
2246 | int8_t etype; |
2247 | struct allocExtDesc *aed; | |
48d6d8ff | 2248 | struct udf_inode_info *iinfo; |
6c1e4d06 JK |
2249 | struct kernel_lb_addr eloc; |
2250 | uint32_t elen; | |
1da177e4 | 2251 | |
cb00ea35 | 2252 | if (epos.bh) { |
3bf25cb4 JK |
2253 | get_bh(epos.bh); |
2254 | get_bh(epos.bh); | |
1da177e4 LT |
2255 | } |
2256 | ||
48d6d8ff MS |
2257 | iinfo = UDF_I(inode); |
2258 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) | |
5ca4e4be | 2259 | adsize = sizeof(struct short_ad); |
48d6d8ff | 2260 | else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
5ca4e4be | 2261 | adsize = sizeof(struct long_ad); |
1da177e4 LT |
2262 | else |
2263 | adsize = 0; | |
2264 | ||
ff116fc8 JK |
2265 | oepos = epos; |
2266 | if (udf_next_aext(inode, &epos, &eloc, &elen, 1) == -1) | |
1da177e4 LT |
2267 | return -1; |
2268 | ||
cb00ea35 | 2269 | while ((etype = udf_next_aext(inode, &epos, &eloc, &elen, 1)) != -1) { |
97e961fd | 2270 | udf_write_aext(inode, &oepos, &eloc, (etype << 30) | elen, 1); |
cb00ea35 | 2271 | if (oepos.bh != epos.bh) { |
ff116fc8 | 2272 | oepos.block = epos.block; |
3bf25cb4 JK |
2273 | brelse(oepos.bh); |
2274 | get_bh(epos.bh); | |
ff116fc8 JK |
2275 | oepos.bh = epos.bh; |
2276 | oepos.offset = epos.offset - adsize; | |
1da177e4 LT |
2277 | } |
2278 | } | |
5ca4e4be | 2279 | memset(&eloc, 0x00, sizeof(struct kernel_lb_addr)); |
1da177e4 LT |
2280 | elen = 0; |
2281 | ||
cb00ea35 | 2282 | if (epos.bh != oepos.bh) { |
97e961fd PE |
2283 | udf_free_blocks(inode->i_sb, inode, &epos.block, 0, 1); |
2284 | udf_write_aext(inode, &oepos, &eloc, elen, 1); | |
2285 | udf_write_aext(inode, &oepos, &eloc, elen, 1); | |
cb00ea35 | 2286 | if (!oepos.bh) { |
48d6d8ff | 2287 | iinfo->i_lenAlloc -= (adsize * 2); |
1da177e4 | 2288 | mark_inode_dirty(inode); |
cb00ea35 | 2289 | } else { |
ff116fc8 | 2290 | aed = (struct allocExtDesc *)oepos.bh->b_data; |
c2104fda | 2291 | le32_add_cpu(&aed->lengthAllocDescs, -(2 * adsize)); |
28de7948 | 2292 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
6c79e987 | 2293 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) |
4b11111a MS |
2294 | udf_update_tag(oepos.bh->b_data, |
2295 | oepos.offset - (2 * adsize)); | |
1da177e4 | 2296 | else |
4b11111a MS |
2297 | udf_update_tag(oepos.bh->b_data, |
2298 | sizeof(struct allocExtDesc)); | |
ff116fc8 | 2299 | mark_buffer_dirty_inode(oepos.bh, inode); |
1da177e4 | 2300 | } |
cb00ea35 | 2301 | } else { |
97e961fd | 2302 | udf_write_aext(inode, &oepos, &eloc, elen, 1); |
cb00ea35 | 2303 | if (!oepos.bh) { |
48d6d8ff | 2304 | iinfo->i_lenAlloc -= adsize; |
1da177e4 | 2305 | mark_inode_dirty(inode); |
cb00ea35 | 2306 | } else { |
ff116fc8 | 2307 | aed = (struct allocExtDesc *)oepos.bh->b_data; |
c2104fda | 2308 | le32_add_cpu(&aed->lengthAllocDescs, -adsize); |
28de7948 | 2309 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
6c79e987 | 2310 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) |
4b11111a MS |
2311 | udf_update_tag(oepos.bh->b_data, |
2312 | epos.offset - adsize); | |
1da177e4 | 2313 | else |
4b11111a MS |
2314 | udf_update_tag(oepos.bh->b_data, |
2315 | sizeof(struct allocExtDesc)); | |
ff116fc8 | 2316 | mark_buffer_dirty_inode(oepos.bh, inode); |
1da177e4 LT |
2317 | } |
2318 | } | |
647bd61a | 2319 | |
3bf25cb4 JK |
2320 | brelse(epos.bh); |
2321 | brelse(oepos.bh); | |
28de7948 | 2322 | |
1da177e4 LT |
2323 | return (elen >> 30); |
2324 | } | |
2325 | ||
4b11111a | 2326 | int8_t inode_bmap(struct inode *inode, sector_t block, |
5ca4e4be | 2327 | struct extent_position *pos, struct kernel_lb_addr *eloc, |
4b11111a | 2328 | uint32_t *elen, sector_t *offset) |
1da177e4 | 2329 | { |
4b11111a | 2330 | unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; |
bbc9abd2 | 2331 | loff_t lbcount = 0, bcount = (loff_t) block << blocksize_bits; |
1da177e4 | 2332 | int8_t etype; |
48d6d8ff | 2333 | struct udf_inode_info *iinfo; |
1da177e4 | 2334 | |
48d6d8ff | 2335 | iinfo = UDF_I(inode); |
99600051 NJ |
2336 | if (!udf_read_extent_cache(inode, bcount, &lbcount, pos)) { |
2337 | pos->offset = 0; | |
2338 | pos->block = iinfo->i_location; | |
2339 | pos->bh = NULL; | |
2340 | } | |
1da177e4 | 2341 | *elen = 0; |
cb00ea35 | 2342 | do { |
4b11111a MS |
2343 | etype = udf_next_aext(inode, pos, eloc, elen, 1); |
2344 | if (etype == -1) { | |
2345 | *offset = (bcount - lbcount) >> blocksize_bits; | |
48d6d8ff | 2346 | iinfo->i_lenExtents = lbcount; |
1da177e4 LT |
2347 | return -1; |
2348 | } | |
2349 | lbcount += *elen; | |
2350 | } while (lbcount <= bcount); | |
99600051 | 2351 | /* update extent cache */ |
b31c9ed9 | 2352 | udf_update_extent_cache(inode, lbcount - *elen, pos); |
4b11111a | 2353 | *offset = (bcount + *elen - lbcount) >> blocksize_bits; |
1da177e4 LT |
2354 | |
2355 | return etype; | |
2356 | } | |
2357 | ||
b490bdd6 | 2358 | udf_pblk_t udf_block_map(struct inode *inode, sector_t block) |
1da177e4 | 2359 | { |
5ca4e4be | 2360 | struct kernel_lb_addr eloc; |
ff116fc8 | 2361 | uint32_t elen; |
60448b1d | 2362 | sector_t offset; |
28de7948 | 2363 | struct extent_position epos = {}; |
b490bdd6 | 2364 | udf_pblk_t ret; |
1da177e4 | 2365 | |
4d0fb621 | 2366 | down_read(&UDF_I(inode)->i_data_sem); |
1da177e4 | 2367 | |
4b11111a MS |
2368 | if (inode_bmap(inode, block, &epos, &eloc, &elen, &offset) == |
2369 | (EXT_RECORDED_ALLOCATED >> 30)) | |
97e961fd | 2370 | ret = udf_get_lb_pblock(inode->i_sb, &eloc, offset); |
1da177e4 LT |
2371 | else |
2372 | ret = 0; | |
2373 | ||
4d0fb621 | 2374 | up_read(&UDF_I(inode)->i_data_sem); |
3bf25cb4 | 2375 | brelse(epos.bh); |
1da177e4 LT |
2376 | |
2377 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_VARCONV)) | |
2378 | return udf_fixed_to_variable(ret); | |
2379 | else | |
2380 | return ret; | |
2381 | } |