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Commit | Line | Data |
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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 | ||
3aac2b62 AV |
142 | if (!inode->i_nlink && !is_bad_inode(inode)) { |
143 | want_delete = 1; | |
7e49b6f2 | 144 | udf_setsize(inode, 0); |
3aac2b62 | 145 | udf_update_inode(inode, IS_SYNC(inode)); |
91b0abe3 JW |
146 | } |
147 | truncate_inode_pages_final(&inode->i_data); | |
3aac2b62 | 148 | invalidate_inode_buffers(inode); |
dbd5768f | 149 | clear_inode(inode); |
2c948b3f JK |
150 | if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB && |
151 | inode->i_size != iinfo->i_lenExtents) { | |
78ace70c JP |
152 | udf_warn(inode->i_sb, "Inode %lu (mode %o) has inode size %llu different from extent length %llu. Filesystem need not be standards compliant.\n", |
153 | inode->i_ino, inode->i_mode, | |
154 | (unsigned long long)inode->i_size, | |
155 | (unsigned long long)iinfo->i_lenExtents); | |
1da177e4 | 156 | } |
48d6d8ff MS |
157 | kfree(iinfo->i_ext.i_data); |
158 | iinfo->i_ext.i_data = NULL; | |
99600051 | 159 | udf_clear_extent_cache(inode); |
3aac2b62 | 160 | if (want_delete) { |
3aac2b62 | 161 | udf_free_inode(inode); |
3aac2b62 | 162 | } |
1da177e4 LT |
163 | } |
164 | ||
5eec54fc IA |
165 | static void udf_write_failed(struct address_space *mapping, loff_t to) |
166 | { | |
167 | struct inode *inode = mapping->host; | |
168 | struct udf_inode_info *iinfo = UDF_I(inode); | |
169 | loff_t isize = inode->i_size; | |
170 | ||
171 | if (to > isize) { | |
7caef267 | 172 | truncate_pagecache(inode, isize); |
5eec54fc IA |
173 | if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { |
174 | down_write(&iinfo->i_data_sem); | |
99600051 | 175 | udf_clear_extent_cache(inode); |
5eec54fc IA |
176 | udf_truncate_extents(inode); |
177 | up_write(&iinfo->i_data_sem); | |
178 | } | |
179 | } | |
180 | } | |
181 | ||
1da177e4 LT |
182 | static int udf_writepage(struct page *page, struct writeback_control *wbc) |
183 | { | |
184 | return block_write_full_page(page, udf_get_block, wbc); | |
185 | } | |
186 | ||
378b8e1a NJ |
187 | static int udf_writepages(struct address_space *mapping, |
188 | struct writeback_control *wbc) | |
189 | { | |
190 | return mpage_writepages(mapping, wbc, udf_get_block); | |
191 | } | |
192 | ||
1da177e4 LT |
193 | static int udf_readpage(struct file *file, struct page *page) |
194 | { | |
bc112323 NJ |
195 | return mpage_readpage(page, udf_get_block); |
196 | } | |
197 | ||
d4388340 | 198 | static void udf_readahead(struct readahead_control *rac) |
bc112323 | 199 | { |
d4388340 | 200 | mpage_readahead(rac, udf_get_block); |
1da177e4 LT |
201 | } |
202 | ||
be021ee4 NP |
203 | static int udf_write_begin(struct file *file, struct address_space *mapping, |
204 | loff_t pos, unsigned len, unsigned flags, | |
205 | struct page **pagep, void **fsdata) | |
1da177e4 | 206 | { |
155130a4 CH |
207 | int ret; |
208 | ||
209 | ret = block_write_begin(mapping, pos, len, flags, pagep, udf_get_block); | |
5eec54fc IA |
210 | if (unlikely(ret)) |
211 | udf_write_failed(mapping, pos + len); | |
212 | return ret; | |
213 | } | |
155130a4 | 214 | |
c8b8e32d | 215 | static ssize_t udf_direct_IO(struct kiocb *iocb, struct iov_iter *iter) |
5eec54fc IA |
216 | { |
217 | struct file *file = iocb->ki_filp; | |
218 | struct address_space *mapping = file->f_mapping; | |
219 | struct inode *inode = mapping->host; | |
a6cbcd4a | 220 | size_t count = iov_iter_count(iter); |
5eec54fc IA |
221 | ssize_t ret; |
222 | ||
c8b8e32d | 223 | ret = blockdev_direct_IO(iocb, inode, iter, udf_get_block); |
6f673763 | 224 | if (unlikely(ret < 0 && iov_iter_rw(iter) == WRITE)) |
c8b8e32d | 225 | udf_write_failed(mapping, iocb->ki_pos + count); |
155130a4 | 226 | return ret; |
1da177e4 LT |
227 | } |
228 | ||
229 | static sector_t udf_bmap(struct address_space *mapping, sector_t block) | |
230 | { | |
cb00ea35 | 231 | return generic_block_bmap(mapping, block, udf_get_block); |
1da177e4 LT |
232 | } |
233 | ||
f5e54d6e | 234 | const struct address_space_operations udf_aops = { |
28de7948 | 235 | .readpage = udf_readpage, |
d4388340 | 236 | .readahead = udf_readahead, |
28de7948 | 237 | .writepage = udf_writepage, |
378b8e1a | 238 | .writepages = udf_writepages, |
5eec54fc IA |
239 | .write_begin = udf_write_begin, |
240 | .write_end = generic_write_end, | |
241 | .direct_IO = udf_direct_IO, | |
28de7948 | 242 | .bmap = udf_bmap, |
1da177e4 LT |
243 | }; |
244 | ||
d2eb8c35 JK |
245 | /* |
246 | * Expand file stored in ICB to a normal one-block-file | |
247 | * | |
248 | * This function requires i_data_sem for writing and releases it. | |
249 | * This function requires i_mutex held | |
250 | */ | |
7e49b6f2 | 251 | int udf_expand_file_adinicb(struct inode *inode) |
1da177e4 LT |
252 | { |
253 | struct page *page; | |
254 | char *kaddr; | |
48d6d8ff | 255 | struct udf_inode_info *iinfo = UDF_I(inode); |
7e49b6f2 | 256 | int err; |
1da177e4 LT |
257 | struct writeback_control udf_wbc = { |
258 | .sync_mode = WB_SYNC_NONE, | |
259 | .nr_to_write = 1, | |
260 | }; | |
261 | ||
5955102c | 262 | WARN_ON_ONCE(!inode_is_locked(inode)); |
48d6d8ff | 263 | if (!iinfo->i_lenAlloc) { |
1da177e4 | 264 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) |
48d6d8ff | 265 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT; |
1da177e4 | 266 | else |
48d6d8ff | 267 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG; |
7e49b6f2 JK |
268 | /* from now on we have normal address_space methods */ |
269 | inode->i_data.a_ops = &udf_aops; | |
d2eb8c35 | 270 | up_write(&iinfo->i_data_sem); |
1da177e4 | 271 | mark_inode_dirty(inode); |
7e49b6f2 | 272 | return 0; |
1da177e4 | 273 | } |
d2eb8c35 JK |
274 | /* |
275 | * Release i_data_sem so that we can lock a page - page lock ranks | |
276 | * above i_data_sem. i_mutex still protects us against file changes. | |
277 | */ | |
278 | up_write(&iinfo->i_data_sem); | |
1da177e4 | 279 | |
7e49b6f2 JK |
280 | page = find_or_create_page(inode->i_mapping, 0, GFP_NOFS); |
281 | if (!page) | |
282 | return -ENOMEM; | |
cd7619d6 | 283 | |
cb00ea35 | 284 | if (!PageUptodate(page)) { |
5c26eac4 | 285 | kaddr = kmap_atomic(page); |
48d6d8ff | 286 | memset(kaddr + iinfo->i_lenAlloc, 0x00, |
09cbfeaf | 287 | PAGE_SIZE - iinfo->i_lenAlloc); |
48d6d8ff MS |
288 | memcpy(kaddr, iinfo->i_ext.i_data + iinfo->i_lenEAttr, |
289 | iinfo->i_lenAlloc); | |
1da177e4 LT |
290 | flush_dcache_page(page); |
291 | SetPageUptodate(page); | |
5c26eac4 | 292 | kunmap_atomic(kaddr); |
1da177e4 | 293 | } |
d2eb8c35 | 294 | down_write(&iinfo->i_data_sem); |
48d6d8ff MS |
295 | memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr, 0x00, |
296 | iinfo->i_lenAlloc); | |
297 | iinfo->i_lenAlloc = 0; | |
1da177e4 | 298 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) |
48d6d8ff | 299 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT; |
1da177e4 | 300 | else |
48d6d8ff | 301 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG; |
7e49b6f2 JK |
302 | /* from now on we have normal address_space methods */ |
303 | inode->i_data.a_ops = &udf_aops; | |
d2eb8c35 | 304 | up_write(&iinfo->i_data_sem); |
7e49b6f2 JK |
305 | err = inode->i_data.a_ops->writepage(page, &udf_wbc); |
306 | if (err) { | |
307 | /* Restore everything back so that we don't lose data... */ | |
308 | lock_page(page); | |
d2eb8c35 | 309 | down_write(&iinfo->i_data_sem); |
5c26eac4 | 310 | kaddr = kmap_atomic(page); |
7e49b6f2 JK |
311 | memcpy(iinfo->i_ext.i_data + iinfo->i_lenEAttr, kaddr, |
312 | inode->i_size); | |
5c26eac4 | 313 | kunmap_atomic(kaddr); |
7e49b6f2 JK |
314 | unlock_page(page); |
315 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB; | |
316 | inode->i_data.a_ops = &udf_adinicb_aops; | |
d2eb8c35 | 317 | up_write(&iinfo->i_data_sem); |
7e49b6f2 | 318 | } |
09cbfeaf | 319 | put_page(page); |
1da177e4 | 320 | mark_inode_dirty(inode); |
7e49b6f2 JK |
321 | |
322 | return err; | |
1da177e4 LT |
323 | } |
324 | ||
b490bdd6 SM |
325 | struct buffer_head *udf_expand_dir_adinicb(struct inode *inode, |
326 | udf_pblk_t *block, int *err) | |
1da177e4 | 327 | { |
b490bdd6 | 328 | udf_pblk_t newblock; |
ff116fc8 | 329 | struct buffer_head *dbh = NULL; |
5ca4e4be | 330 | struct kernel_lb_addr eloc; |
1da177e4 | 331 | uint8_t alloctype; |
ff116fc8 | 332 | struct extent_position epos; |
1da177e4 LT |
333 | |
334 | struct udf_fileident_bh sfibh, dfibh; | |
af793295 JK |
335 | loff_t f_pos = udf_ext0_offset(inode); |
336 | int size = udf_ext0_offset(inode) + inode->i_size; | |
1da177e4 | 337 | struct fileIdentDesc cfi, *sfi, *dfi; |
48d6d8ff | 338 | struct udf_inode_info *iinfo = UDF_I(inode); |
1da177e4 LT |
339 | |
340 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) | |
341 | alloctype = ICBTAG_FLAG_AD_SHORT; | |
342 | else | |
343 | alloctype = ICBTAG_FLAG_AD_LONG; | |
344 | ||
cb00ea35 | 345 | if (!inode->i_size) { |
48d6d8ff | 346 | iinfo->i_alloc_type = alloctype; |
1da177e4 LT |
347 | mark_inode_dirty(inode); |
348 | return NULL; | |
349 | } | |
350 | ||
351 | /* alloc block, and copy data to it */ | |
352 | *block = udf_new_block(inode->i_sb, inode, | |
48d6d8ff MS |
353 | iinfo->i_location.partitionReferenceNum, |
354 | iinfo->i_location.logicalBlockNum, err); | |
1da177e4 LT |
355 | if (!(*block)) |
356 | return NULL; | |
357 | newblock = udf_get_pblock(inode->i_sb, *block, | |
48d6d8ff | 358 | iinfo->i_location.partitionReferenceNum, |
c0b34438 | 359 | 0); |
1da177e4 LT |
360 | if (!newblock) |
361 | return NULL; | |
362 | dbh = udf_tgetblk(inode->i_sb, newblock); | |
363 | if (!dbh) | |
364 | return NULL; | |
365 | lock_buffer(dbh); | |
366 | memset(dbh->b_data, 0x00, inode->i_sb->s_blocksize); | |
367 | set_buffer_uptodate(dbh); | |
368 | unlock_buffer(dbh); | |
369 | mark_buffer_dirty_inode(dbh, inode); | |
370 | ||
4b11111a | 371 | sfibh.soffset = sfibh.eoffset = |
af793295 | 372 | f_pos & (inode->i_sb->s_blocksize - 1); |
ff116fc8 | 373 | sfibh.sbh = sfibh.ebh = NULL; |
1da177e4 LT |
374 | dfibh.soffset = dfibh.eoffset = 0; |
375 | dfibh.sbh = dfibh.ebh = dbh; | |
af793295 | 376 | while (f_pos < size) { |
48d6d8ff | 377 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB; |
4b11111a MS |
378 | sfi = udf_fileident_read(inode, &f_pos, &sfibh, &cfi, NULL, |
379 | NULL, NULL, NULL); | |
cb00ea35 | 380 | if (!sfi) { |
3bf25cb4 | 381 | brelse(dbh); |
1da177e4 LT |
382 | return NULL; |
383 | } | |
48d6d8ff | 384 | iinfo->i_alloc_type = alloctype; |
1da177e4 LT |
385 | sfi->descTag.tagLocation = cpu_to_le32(*block); |
386 | dfibh.soffset = dfibh.eoffset; | |
387 | dfibh.eoffset += (sfibh.eoffset - sfibh.soffset); | |
388 | dfi = (struct fileIdentDesc *)(dbh->b_data + dfibh.soffset); | |
389 | if (udf_write_fi(inode, sfi, dfi, &dfibh, sfi->impUse, | |
4b11111a MS |
390 | sfi->fileIdent + |
391 | le16_to_cpu(sfi->lengthOfImpUse))) { | |
48d6d8ff | 392 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB; |
3bf25cb4 | 393 | brelse(dbh); |
1da177e4 LT |
394 | return NULL; |
395 | } | |
396 | } | |
397 | mark_buffer_dirty_inode(dbh, inode); | |
398 | ||
48d6d8ff MS |
399 | memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr, 0, |
400 | iinfo->i_lenAlloc); | |
401 | iinfo->i_lenAlloc = 0; | |
1da177e4 | 402 | eloc.logicalBlockNum = *block; |
4b11111a | 403 | eloc.partitionReferenceNum = |
48d6d8ff | 404 | iinfo->i_location.partitionReferenceNum; |
2c948b3f | 405 | iinfo->i_lenExtents = inode->i_size; |
ff116fc8 | 406 | epos.bh = NULL; |
48d6d8ff | 407 | epos.block = iinfo->i_location; |
ff116fc8 | 408 | epos.offset = udf_file_entry_alloc_offset(inode); |
2c948b3f | 409 | udf_add_aext(inode, &epos, &eloc, inode->i_size, 0); |
1da177e4 LT |
410 | /* UniqueID stuff */ |
411 | ||
3bf25cb4 | 412 | brelse(epos.bh); |
1da177e4 LT |
413 | mark_inode_dirty(inode); |
414 | return dbh; | |
415 | } | |
416 | ||
cb00ea35 CG |
417 | static int udf_get_block(struct inode *inode, sector_t block, |
418 | struct buffer_head *bh_result, int create) | |
1da177e4 LT |
419 | { |
420 | int err, new; | |
1ed16171 | 421 | sector_t phys = 0; |
48d6d8ff | 422 | struct udf_inode_info *iinfo; |
1da177e4 | 423 | |
cb00ea35 | 424 | if (!create) { |
1da177e4 LT |
425 | phys = udf_block_map(inode, block); |
426 | if (phys) | |
427 | map_bh(bh_result, inode->i_sb, phys); | |
428 | return 0; | |
429 | } | |
430 | ||
431 | err = -EIO; | |
432 | new = 0; | |
48d6d8ff | 433 | iinfo = UDF_I(inode); |
4d0fb621 AIB |
434 | |
435 | down_write(&iinfo->i_data_sem); | |
48d6d8ff MS |
436 | if (block == iinfo->i_next_alloc_block + 1) { |
437 | iinfo->i_next_alloc_block++; | |
438 | iinfo->i_next_alloc_goal++; | |
1da177e4 LT |
439 | } |
440 | ||
99600051 | 441 | udf_clear_extent_cache(inode); |
7b0b0933 JK |
442 | phys = inode_getblk(inode, block, &err, &new); |
443 | if (!phys) | |
1da177e4 | 444 | goto abort; |
1da177e4 LT |
445 | |
446 | if (new) | |
447 | set_buffer_new(bh_result); | |
448 | map_bh(bh_result, inode->i_sb, phys); | |
28de7948 CG |
449 | |
450 | abort: | |
4d0fb621 | 451 | up_write(&iinfo->i_data_sem); |
1da177e4 | 452 | return err; |
1da177e4 LT |
453 | } |
454 | ||
b490bdd6 | 455 | static struct buffer_head *udf_getblk(struct inode *inode, udf_pblk_t block, |
cb00ea35 | 456 | int create, int *err) |
1da177e4 | 457 | { |
28de7948 | 458 | struct buffer_head *bh; |
1da177e4 LT |
459 | struct buffer_head dummy; |
460 | ||
461 | dummy.b_state = 0; | |
462 | dummy.b_blocknr = -1000; | |
463 | *err = udf_get_block(inode, block, &dummy, create); | |
cb00ea35 | 464 | if (!*err && buffer_mapped(&dummy)) { |
1da177e4 | 465 | bh = sb_getblk(inode->i_sb, dummy.b_blocknr); |
cb00ea35 | 466 | if (buffer_new(&dummy)) { |
1da177e4 LT |
467 | lock_buffer(bh); |
468 | memset(bh->b_data, 0x00, inode->i_sb->s_blocksize); | |
469 | set_buffer_uptodate(bh); | |
470 | unlock_buffer(bh); | |
471 | mark_buffer_dirty_inode(bh, inode); | |
472 | } | |
473 | return bh; | |
474 | } | |
28de7948 | 475 | |
1da177e4 LT |
476 | return NULL; |
477 | } | |
478 | ||
fa33cdbf SM |
479 | /* Extend the file with new blocks totaling 'new_block_bytes', |
480 | * return the number of extents added | |
481 | */ | |
7e49b6f2 JK |
482 | static int udf_do_extend_file(struct inode *inode, |
483 | struct extent_position *last_pos, | |
484 | struct kernel_long_ad *last_ext, | |
fa33cdbf | 485 | loff_t new_block_bytes) |
31170b6a | 486 | { |
fa33cdbf | 487 | uint32_t add; |
31170b6a JK |
488 | int count = 0, fake = !(last_ext->extLength & UDF_EXTENT_LENGTH_MASK); |
489 | struct super_block *sb = inode->i_sb; | |
5ca4e4be | 490 | struct kernel_lb_addr prealloc_loc = {}; |
89a4d970 | 491 | uint32_t prealloc_len = 0; |
48d6d8ff | 492 | struct udf_inode_info *iinfo; |
7e49b6f2 | 493 | int err; |
31170b6a JK |
494 | |
495 | /* The previous extent is fake and we should not extend by anything | |
496 | * - there's nothing to do... */ | |
fa33cdbf | 497 | if (!new_block_bytes && fake) |
31170b6a | 498 | return 0; |
28de7948 | 499 | |
48d6d8ff | 500 | iinfo = UDF_I(inode); |
31170b6a JK |
501 | /* Round the last extent up to a multiple of block size */ |
502 | if (last_ext->extLength & (sb->s_blocksize - 1)) { | |
503 | last_ext->extLength = | |
28de7948 CG |
504 | (last_ext->extLength & UDF_EXTENT_FLAG_MASK) | |
505 | (((last_ext->extLength & UDF_EXTENT_LENGTH_MASK) + | |
506 | sb->s_blocksize - 1) & ~(sb->s_blocksize - 1)); | |
48d6d8ff MS |
507 | iinfo->i_lenExtents = |
508 | (iinfo->i_lenExtents + sb->s_blocksize - 1) & | |
28de7948 | 509 | ~(sb->s_blocksize - 1); |
31170b6a | 510 | } |
28de7948 | 511 | |
31170b6a | 512 | /* Last extent are just preallocated blocks? */ |
4b11111a MS |
513 | if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) == |
514 | EXT_NOT_RECORDED_ALLOCATED) { | |
31170b6a JK |
515 | /* Save the extent so that we can reattach it to the end */ |
516 | prealloc_loc = last_ext->extLocation; | |
517 | prealloc_len = last_ext->extLength; | |
518 | /* Mark the extent as a hole */ | |
519 | last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | | |
28de7948 | 520 | (last_ext->extLength & UDF_EXTENT_LENGTH_MASK); |
31170b6a | 521 | last_ext->extLocation.logicalBlockNum = 0; |
4b11111a | 522 | last_ext->extLocation.partitionReferenceNum = 0; |
31170b6a | 523 | } |
28de7948 | 524 | |
31170b6a | 525 | /* Can we merge with the previous extent? */ |
4b11111a MS |
526 | if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) == |
527 | EXT_NOT_RECORDED_NOT_ALLOCATED) { | |
fa33cdbf SM |
528 | add = (1 << 30) - sb->s_blocksize - |
529 | (last_ext->extLength & UDF_EXTENT_LENGTH_MASK); | |
530 | if (add > new_block_bytes) | |
531 | add = new_block_bytes; | |
532 | new_block_bytes -= add; | |
533 | last_ext->extLength += add; | |
31170b6a JK |
534 | } |
535 | ||
536 | if (fake) { | |
97e961fd | 537 | udf_add_aext(inode, last_pos, &last_ext->extLocation, |
cb00ea35 | 538 | last_ext->extLength, 1); |
31170b6a | 539 | count++; |
6c371578 JK |
540 | } else { |
541 | struct kernel_lb_addr tmploc; | |
542 | uint32_t tmplen; | |
543 | ||
97e961fd | 544 | udf_write_aext(inode, last_pos, &last_ext->extLocation, |
4b11111a | 545 | last_ext->extLength, 1); |
6c371578 JK |
546 | /* |
547 | * We've rewritten the last extent but there may be empty | |
548 | * indirect extent after it - enter it. | |
549 | */ | |
550 | udf_next_aext(inode, last_pos, &tmploc, &tmplen, 0); | |
551 | } | |
28de7948 | 552 | |
31170b6a | 553 | /* Managed to do everything necessary? */ |
fa33cdbf | 554 | if (!new_block_bytes) |
31170b6a JK |
555 | goto out; |
556 | ||
557 | /* All further extents will be NOT_RECORDED_NOT_ALLOCATED */ | |
558 | last_ext->extLocation.logicalBlockNum = 0; | |
4b11111a | 559 | last_ext->extLocation.partitionReferenceNum = 0; |
fa33cdbf SM |
560 | add = (1 << 30) - sb->s_blocksize; |
561 | last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | add; | |
28de7948 | 562 | |
31170b6a | 563 | /* Create enough extents to cover the whole hole */ |
fa33cdbf SM |
564 | while (new_block_bytes > add) { |
565 | new_block_bytes -= add; | |
7e49b6f2 JK |
566 | err = udf_add_aext(inode, last_pos, &last_ext->extLocation, |
567 | last_ext->extLength, 1); | |
568 | if (err) | |
569 | return err; | |
31170b6a JK |
570 | count++; |
571 | } | |
fa33cdbf | 572 | if (new_block_bytes) { |
31170b6a | 573 | last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | |
fa33cdbf | 574 | new_block_bytes; |
7e49b6f2 JK |
575 | err = udf_add_aext(inode, last_pos, &last_ext->extLocation, |
576 | last_ext->extLength, 1); | |
577 | if (err) | |
578 | return err; | |
31170b6a JK |
579 | count++; |
580 | } | |
28de7948 CG |
581 | |
582 | out: | |
31170b6a JK |
583 | /* Do we have some preallocated blocks saved? */ |
584 | if (prealloc_len) { | |
7e49b6f2 JK |
585 | err = udf_add_aext(inode, last_pos, &prealloc_loc, |
586 | prealloc_len, 1); | |
587 | if (err) | |
588 | return err; | |
31170b6a JK |
589 | last_ext->extLocation = prealloc_loc; |
590 | last_ext->extLength = prealloc_len; | |
591 | count++; | |
592 | } | |
28de7948 | 593 | |
31170b6a | 594 | /* last_pos should point to the last written extent... */ |
48d6d8ff | 595 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
5ca4e4be | 596 | last_pos->offset -= sizeof(struct short_ad); |
48d6d8ff | 597 | else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
5ca4e4be | 598 | last_pos->offset -= sizeof(struct long_ad); |
31170b6a | 599 | else |
7e49b6f2 | 600 | return -EIO; |
28de7948 | 601 | |
31170b6a JK |
602 | return count; |
603 | } | |
604 | ||
fa33cdbf SM |
605 | /* Extend the final block of the file to final_block_len bytes */ |
606 | static void udf_do_extend_final_block(struct inode *inode, | |
607 | struct extent_position *last_pos, | |
608 | struct kernel_long_ad *last_ext, | |
609 | uint32_t final_block_len) | |
610 | { | |
611 | struct super_block *sb = inode->i_sb; | |
612 | uint32_t added_bytes; | |
613 | ||
614 | added_bytes = final_block_len - | |
615 | (last_ext->extLength & (sb->s_blocksize - 1)); | |
616 | last_ext->extLength += added_bytes; | |
617 | UDF_I(inode)->i_lenExtents += added_bytes; | |
618 | ||
619 | udf_write_aext(inode, last_pos, &last_ext->extLocation, | |
620 | last_ext->extLength, 1); | |
621 | } | |
622 | ||
7e49b6f2 JK |
623 | static int udf_extend_file(struct inode *inode, loff_t newsize) |
624 | { | |
625 | ||
626 | struct extent_position epos; | |
627 | struct kernel_lb_addr eloc; | |
628 | uint32_t elen; | |
629 | int8_t etype; | |
630 | struct super_block *sb = inode->i_sb; | |
631 | sector_t first_block = newsize >> sb->s_blocksize_bits, offset; | |
fa33cdbf | 632 | unsigned long partial_final_block; |
7e49b6f2 JK |
633 | int adsize; |
634 | struct udf_inode_info *iinfo = UDF_I(inode); | |
635 | struct kernel_long_ad extent; | |
fa33cdbf SM |
636 | int err = 0; |
637 | int within_final_block; | |
7e49b6f2 JK |
638 | |
639 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) | |
640 | adsize = sizeof(struct short_ad); | |
641 | else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) | |
642 | adsize = sizeof(struct long_ad); | |
643 | else | |
644 | BUG(); | |
645 | ||
646 | etype = inode_bmap(inode, first_block, &epos, &eloc, &elen, &offset); | |
fa33cdbf | 647 | within_final_block = (etype != -1); |
7e49b6f2 | 648 | |
7e49b6f2 JK |
649 | if ((!epos.bh && epos.offset == udf_file_entry_alloc_offset(inode)) || |
650 | (epos.bh && epos.offset == sizeof(struct allocExtDesc))) { | |
651 | /* File has no extents at all or has empty last | |
652 | * indirect extent! Create a fake extent... */ | |
653 | extent.extLocation.logicalBlockNum = 0; | |
654 | extent.extLocation.partitionReferenceNum = 0; | |
655 | extent.extLength = EXT_NOT_RECORDED_NOT_ALLOCATED; | |
656 | } else { | |
657 | epos.offset -= adsize; | |
658 | etype = udf_next_aext(inode, &epos, &extent.extLocation, | |
659 | &extent.extLength, 0); | |
660 | extent.extLength |= etype << 30; | |
661 | } | |
fa33cdbf SM |
662 | |
663 | partial_final_block = newsize & (sb->s_blocksize - 1); | |
664 | ||
665 | /* File has extent covering the new size (could happen when extending | |
666 | * inside a block)? | |
667 | */ | |
668 | if (within_final_block) { | |
669 | /* Extending file within the last file block */ | |
670 | udf_do_extend_final_block(inode, &epos, &extent, | |
671 | partial_final_block); | |
672 | } else { | |
673 | loff_t add = ((loff_t)offset << sb->s_blocksize_bits) | | |
674 | partial_final_block; | |
675 | err = udf_do_extend_file(inode, &epos, &extent, add); | |
676 | } | |
677 | ||
7e49b6f2 JK |
678 | if (err < 0) |
679 | goto out; | |
680 | err = 0; | |
681 | iinfo->i_lenExtents = newsize; | |
682 | out: | |
683 | brelse(epos.bh); | |
684 | return err; | |
685 | } | |
686 | ||
7b0b0933 JK |
687 | static sector_t inode_getblk(struct inode *inode, sector_t block, |
688 | int *err, int *new) | |
1da177e4 | 689 | { |
5ca4e4be | 690 | struct kernel_long_ad laarr[EXTENT_MERGE_SIZE]; |
ff116fc8 | 691 | struct extent_position prev_epos, cur_epos, next_epos; |
1da177e4 | 692 | int count = 0, startnum = 0, endnum = 0; |
85d71244 | 693 | uint32_t elen = 0, tmpelen; |
5ca4e4be | 694 | struct kernel_lb_addr eloc, tmpeloc; |
1da177e4 | 695 | int c = 1; |
60448b1d | 696 | loff_t lbcount = 0, b_off = 0; |
b490bdd6 | 697 | udf_pblk_t newblocknum, newblock; |
60448b1d | 698 | sector_t offset = 0; |
1da177e4 | 699 | int8_t etype; |
48d6d8ff | 700 | struct udf_inode_info *iinfo = UDF_I(inode); |
b490bdd6 | 701 | udf_pblk_t goal = 0, pgoal = iinfo->i_location.logicalBlockNum; |
31170b6a | 702 | int lastblock = 0; |
fb719c59 | 703 | bool isBeyondEOF; |
1da177e4 | 704 | |
7b0b0933 JK |
705 | *err = 0; |
706 | *new = 0; | |
ff116fc8 | 707 | prev_epos.offset = udf_file_entry_alloc_offset(inode); |
48d6d8ff | 708 | prev_epos.block = iinfo->i_location; |
ff116fc8 JK |
709 | prev_epos.bh = NULL; |
710 | cur_epos = next_epos = prev_epos; | |
28de7948 | 711 | b_off = (loff_t)block << inode->i_sb->s_blocksize_bits; |
1da177e4 LT |
712 | |
713 | /* find the extent which contains the block we are looking for. | |
cb00ea35 CG |
714 | alternate between laarr[0] and laarr[1] for locations of the |
715 | current extent, and the previous extent */ | |
716 | do { | |
717 | if (prev_epos.bh != cur_epos.bh) { | |
3bf25cb4 JK |
718 | brelse(prev_epos.bh); |
719 | get_bh(cur_epos.bh); | |
ff116fc8 | 720 | prev_epos.bh = cur_epos.bh; |
1da177e4 | 721 | } |
cb00ea35 | 722 | if (cur_epos.bh != next_epos.bh) { |
3bf25cb4 JK |
723 | brelse(cur_epos.bh); |
724 | get_bh(next_epos.bh); | |
ff116fc8 | 725 | cur_epos.bh = next_epos.bh; |
1da177e4 LT |
726 | } |
727 | ||
728 | lbcount += elen; | |
729 | ||
ff116fc8 JK |
730 | prev_epos.block = cur_epos.block; |
731 | cur_epos.block = next_epos.block; | |
1da177e4 | 732 | |
ff116fc8 JK |
733 | prev_epos.offset = cur_epos.offset; |
734 | cur_epos.offset = next_epos.offset; | |
1da177e4 | 735 | |
4b11111a MS |
736 | etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 1); |
737 | if (etype == -1) | |
1da177e4 LT |
738 | break; |
739 | ||
740 | c = !c; | |
741 | ||
742 | laarr[c].extLength = (etype << 30) | elen; | |
743 | laarr[c].extLocation = eloc; | |
744 | ||
745 | if (etype != (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) | |
746 | pgoal = eloc.logicalBlockNum + | |
28de7948 CG |
747 | ((elen + inode->i_sb->s_blocksize - 1) >> |
748 | inode->i_sb->s_blocksize_bits); | |
1da177e4 | 749 | |
cb00ea35 | 750 | count++; |
1da177e4 LT |
751 | } while (lbcount + elen <= b_off); |
752 | ||
753 | b_off -= lbcount; | |
754 | offset = b_off >> inode->i_sb->s_blocksize_bits; | |
85d71244 JK |
755 | /* |
756 | * Move prev_epos and cur_epos into indirect extent if we are at | |
757 | * the pointer to it | |
758 | */ | |
759 | udf_next_aext(inode, &prev_epos, &tmpeloc, &tmpelen, 0); | |
760 | udf_next_aext(inode, &cur_epos, &tmpeloc, &tmpelen, 0); | |
1da177e4 LT |
761 | |
762 | /* if the extent is allocated and recorded, return the block | |
cb00ea35 | 763 | if the extent is not a multiple of the blocksize, round up */ |
1da177e4 | 764 | |
cb00ea35 CG |
765 | if (etype == (EXT_RECORDED_ALLOCATED >> 30)) { |
766 | if (elen & (inode->i_sb->s_blocksize - 1)) { | |
1da177e4 | 767 | elen = EXT_RECORDED_ALLOCATED | |
28de7948 CG |
768 | ((elen + inode->i_sb->s_blocksize - 1) & |
769 | ~(inode->i_sb->s_blocksize - 1)); | |
7e49b6f2 | 770 | udf_write_aext(inode, &cur_epos, &eloc, elen, 1); |
1da177e4 | 771 | } |
97e961fd | 772 | newblock = udf_get_lb_pblock(inode->i_sb, &eloc, offset); |
02d4ca49 | 773 | goto out_free; |
1da177e4 LT |
774 | } |
775 | ||
31170b6a | 776 | /* Are we beyond EOF? */ |
cb00ea35 | 777 | if (etype == -1) { |
31170b6a | 778 | int ret; |
fa33cdbf | 779 | loff_t hole_len; |
6981498d | 780 | isBeyondEOF = true; |
31170b6a JK |
781 | if (count) { |
782 | if (c) | |
783 | laarr[0] = laarr[1]; | |
784 | startnum = 1; | |
cb00ea35 | 785 | } else { |
31170b6a | 786 | /* Create a fake extent when there's not one */ |
4b11111a | 787 | memset(&laarr[0].extLocation, 0x00, |
5ca4e4be | 788 | sizeof(struct kernel_lb_addr)); |
31170b6a | 789 | laarr[0].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED; |
7e49b6f2 | 790 | /* Will udf_do_extend_file() create real extent from |
4b11111a | 791 | a fake one? */ |
31170b6a JK |
792 | startnum = (offset > 0); |
793 | } | |
794 | /* Create extents for the hole between EOF and offset */ | |
fa33cdbf SM |
795 | hole_len = (loff_t)offset << inode->i_blkbits; |
796 | ret = udf_do_extend_file(inode, &prev_epos, laarr, hole_len); | |
7e49b6f2 | 797 | if (ret < 0) { |
7e49b6f2 | 798 | *err = ret; |
02d4ca49 FF |
799 | newblock = 0; |
800 | goto out_free; | |
31170b6a JK |
801 | } |
802 | c = 0; | |
803 | offset = 0; | |
804 | count += ret; | |
805 | /* We are not covered by a preallocated extent? */ | |
4b11111a MS |
806 | if ((laarr[0].extLength & UDF_EXTENT_FLAG_MASK) != |
807 | EXT_NOT_RECORDED_ALLOCATED) { | |
31170b6a JK |
808 | /* Is there any real extent? - otherwise we overwrite |
809 | * the fake one... */ | |
810 | if (count) | |
811 | c = !c; | |
812 | laarr[c].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | | |
28de7948 | 813 | inode->i_sb->s_blocksize; |
4b11111a | 814 | memset(&laarr[c].extLocation, 0x00, |
5ca4e4be | 815 | sizeof(struct kernel_lb_addr)); |
cb00ea35 | 816 | count++; |
31170b6a | 817 | } |
cb00ea35 | 818 | endnum = c + 1; |
1da177e4 | 819 | lastblock = 1; |
cb00ea35 | 820 | } else { |
6981498d | 821 | isBeyondEOF = false; |
1da177e4 LT |
822 | endnum = startnum = ((count > 2) ? 2 : count); |
823 | ||
4b11111a MS |
824 | /* if the current extent is in position 0, |
825 | swap it with the previous */ | |
cb00ea35 | 826 | if (!c && count != 1) { |
31170b6a JK |
827 | laarr[2] = laarr[0]; |
828 | laarr[0] = laarr[1]; | |
829 | laarr[1] = laarr[2]; | |
830 | c = 1; | |
831 | } | |
1da177e4 | 832 | |
4b11111a MS |
833 | /* if the current block is located in an extent, |
834 | read the next extent */ | |
835 | etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 0); | |
836 | if (etype != -1) { | |
cb00ea35 CG |
837 | laarr[c + 1].extLength = (etype << 30) | elen; |
838 | laarr[c + 1].extLocation = eloc; | |
839 | count++; | |
840 | startnum++; | |
841 | endnum++; | |
4b11111a | 842 | } else |
1da177e4 LT |
843 | lastblock = 1; |
844 | } | |
1da177e4 LT |
845 | |
846 | /* if the current extent is not recorded but allocated, get the | |
28de7948 | 847 | * block in the extent corresponding to the requested block */ |
4b11111a | 848 | if ((laarr[c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30)) |
1da177e4 | 849 | newblocknum = laarr[c].extLocation.logicalBlockNum + offset; |
4b11111a | 850 | else { /* otherwise, allocate a new block */ |
48d6d8ff MS |
851 | if (iinfo->i_next_alloc_block == block) |
852 | goal = iinfo->i_next_alloc_goal; | |
1da177e4 | 853 | |
cb00ea35 | 854 | if (!goal) { |
4b11111a | 855 | if (!(goal = pgoal)) /* XXX: what was intended here? */ |
48d6d8ff | 856 | goal = iinfo->i_location.logicalBlockNum + 1; |
1da177e4 LT |
857 | } |
858 | ||
4b11111a | 859 | newblocknum = udf_new_block(inode->i_sb, inode, |
48d6d8ff | 860 | iinfo->i_location.partitionReferenceNum, |
4b11111a MS |
861 | goal, err); |
862 | if (!newblocknum) { | |
1da177e4 | 863 | *err = -ENOSPC; |
02d4ca49 FF |
864 | newblock = 0; |
865 | goto out_free; | |
1da177e4 | 866 | } |
fb719c59 NJ |
867 | if (isBeyondEOF) |
868 | iinfo->i_lenExtents += inode->i_sb->s_blocksize; | |
1da177e4 LT |
869 | } |
870 | ||
4b11111a MS |
871 | /* if the extent the requsted block is located in contains multiple |
872 | * blocks, split the extent into at most three extents. blocks prior | |
873 | * to requested block, requested block, and blocks after requested | |
874 | * block */ | |
1da177e4 LT |
875 | udf_split_extents(inode, &c, offset, newblocknum, laarr, &endnum); |
876 | ||
81056dd0 JK |
877 | /* We preallocate blocks only for regular files. It also makes sense |
878 | * for directories but there's a problem when to drop the | |
879 | * preallocation. We might use some delayed work for that but I feel | |
880 | * it's overengineering for a filesystem like UDF. */ | |
881 | if (S_ISREG(inode->i_mode)) | |
882 | udf_prealloc_extents(inode, c, lastblock, laarr, &endnum); | |
1da177e4 LT |
883 | |
884 | /* merge any continuous blocks in laarr */ | |
885 | udf_merge_extents(inode, laarr, &endnum); | |
886 | ||
887 | /* write back the new extents, inserting new extents if the new number | |
28de7948 CG |
888 | * of extents is greater than the old number, and deleting extents if |
889 | * the new number of extents is less than the old number */ | |
ff116fc8 | 890 | udf_update_extents(inode, laarr, startnum, endnum, &prev_epos); |
1da177e4 | 891 | |
4b11111a | 892 | newblock = udf_get_pblock(inode->i_sb, newblocknum, |
48d6d8ff | 893 | iinfo->i_location.partitionReferenceNum, 0); |
7b0b0933 JK |
894 | if (!newblock) { |
895 | *err = -EIO; | |
02d4ca49 | 896 | goto out_free; |
7b0b0933 | 897 | } |
1da177e4 | 898 | *new = 1; |
48d6d8ff MS |
899 | iinfo->i_next_alloc_block = block; |
900 | iinfo->i_next_alloc_goal = newblocknum; | |
c2050a45 | 901 | inode->i_ctime = current_time(inode); |
1da177e4 LT |
902 | |
903 | if (IS_SYNC(inode)) | |
904 | udf_sync_inode(inode); | |
905 | else | |
906 | mark_inode_dirty(inode); | |
02d4ca49 FF |
907 | out_free: |
908 | brelse(prev_epos.bh); | |
909 | brelse(cur_epos.bh); | |
910 | brelse(next_epos.bh); | |
7b0b0933 | 911 | return newblock; |
1da177e4 LT |
912 | } |
913 | ||
cb00ea35 | 914 | static void udf_split_extents(struct inode *inode, int *c, int offset, |
b490bdd6 SM |
915 | udf_pblk_t newblocknum, |
916 | struct kernel_long_ad *laarr, int *endnum) | |
1da177e4 | 917 | { |
4b11111a MS |
918 | unsigned long blocksize = inode->i_sb->s_blocksize; |
919 | unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; | |
920 | ||
1da177e4 | 921 | if ((laarr[*c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30) || |
4b11111a MS |
922 | (laarr[*c].extLength >> 30) == |
923 | (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) { | |
1da177e4 LT |
924 | int curr = *c; |
925 | int blen = ((laarr[curr].extLength & UDF_EXTENT_LENGTH_MASK) + | |
4b11111a | 926 | blocksize - 1) >> blocksize_bits; |
1da177e4 LT |
927 | int8_t etype = (laarr[curr].extLength >> 30); |
928 | ||
4b11111a | 929 | if (blen == 1) |
28de7948 | 930 | ; |
4b11111a | 931 | else if (!offset || blen == offset + 1) { |
cb00ea35 CG |
932 | laarr[curr + 2] = laarr[curr + 1]; |
933 | laarr[curr + 1] = laarr[curr]; | |
934 | } else { | |
935 | laarr[curr + 3] = laarr[curr + 1]; | |
936 | laarr[curr + 2] = laarr[curr + 1] = laarr[curr]; | |
937 | } | |
938 | ||
939 | if (offset) { | |
940 | if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30)) { | |
4b11111a | 941 | udf_free_blocks(inode->i_sb, inode, |
97e961fd | 942 | &laarr[curr].extLocation, |
4b11111a MS |
943 | 0, offset); |
944 | laarr[curr].extLength = | |
945 | EXT_NOT_RECORDED_NOT_ALLOCATED | | |
946 | (offset << blocksize_bits); | |
1da177e4 | 947 | laarr[curr].extLocation.logicalBlockNum = 0; |
4b11111a MS |
948 | laarr[curr].extLocation. |
949 | partitionReferenceNum = 0; | |
950 | } else | |
1da177e4 | 951 | laarr[curr].extLength = (etype << 30) | |
4b11111a | 952 | (offset << blocksize_bits); |
cb00ea35 CG |
953 | curr++; |
954 | (*c)++; | |
955 | (*endnum)++; | |
1da177e4 | 956 | } |
647bd61a | 957 | |
1da177e4 LT |
958 | laarr[curr].extLocation.logicalBlockNum = newblocknum; |
959 | if (etype == (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) | |
960 | laarr[curr].extLocation.partitionReferenceNum = | |
c0b34438 | 961 | UDF_I(inode)->i_location.partitionReferenceNum; |
1da177e4 | 962 | laarr[curr].extLength = EXT_RECORDED_ALLOCATED | |
4b11111a | 963 | blocksize; |
cb00ea35 | 964 | curr++; |
1da177e4 | 965 | |
cb00ea35 | 966 | if (blen != offset + 1) { |
1da177e4 | 967 | if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30)) |
4b11111a MS |
968 | laarr[curr].extLocation.logicalBlockNum += |
969 | offset + 1; | |
28de7948 | 970 | laarr[curr].extLength = (etype << 30) | |
4b11111a | 971 | ((blen - (offset + 1)) << blocksize_bits); |
cb00ea35 CG |
972 | curr++; |
973 | (*endnum)++; | |
1da177e4 LT |
974 | } |
975 | } | |
976 | } | |
977 | ||
978 | static void udf_prealloc_extents(struct inode *inode, int c, int lastblock, | |
3cc6f844 | 979 | struct kernel_long_ad *laarr, |
cb00ea35 | 980 | int *endnum) |
1da177e4 LT |
981 | { |
982 | int start, length = 0, currlength = 0, i; | |
983 | ||
cb00ea35 | 984 | if (*endnum >= (c + 1)) { |
1da177e4 LT |
985 | if (!lastblock) |
986 | return; | |
987 | else | |
988 | start = c; | |
cb00ea35 | 989 | } else { |
4b11111a MS |
990 | if ((laarr[c + 1].extLength >> 30) == |
991 | (EXT_NOT_RECORDED_ALLOCATED >> 30)) { | |
cb00ea35 | 992 | start = c + 1; |
4b11111a MS |
993 | length = currlength = |
994 | (((laarr[c + 1].extLength & | |
995 | UDF_EXTENT_LENGTH_MASK) + | |
996 | inode->i_sb->s_blocksize - 1) >> | |
997 | inode->i_sb->s_blocksize_bits); | |
998 | } else | |
1da177e4 LT |
999 | start = c; |
1000 | } | |
1001 | ||
cb00ea35 CG |
1002 | for (i = start + 1; i <= *endnum; i++) { |
1003 | if (i == *endnum) { | |
1da177e4 LT |
1004 | if (lastblock) |
1005 | length += UDF_DEFAULT_PREALLOC_BLOCKS; | |
4b11111a MS |
1006 | } else if ((laarr[i].extLength >> 30) == |
1007 | (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) { | |
1008 | length += (((laarr[i].extLength & | |
1009 | UDF_EXTENT_LENGTH_MASK) + | |
1010 | inode->i_sb->s_blocksize - 1) >> | |
1011 | inode->i_sb->s_blocksize_bits); | |
1012 | } else | |
1da177e4 LT |
1013 | break; |
1014 | } | |
1015 | ||
cb00ea35 | 1016 | if (length) { |
1da177e4 | 1017 | int next = laarr[start].extLocation.logicalBlockNum + |
28de7948 | 1018 | (((laarr[start].extLength & UDF_EXTENT_LENGTH_MASK) + |
4b11111a MS |
1019 | inode->i_sb->s_blocksize - 1) >> |
1020 | inode->i_sb->s_blocksize_bits); | |
1da177e4 | 1021 | int numalloc = udf_prealloc_blocks(inode->i_sb, inode, |
4b11111a MS |
1022 | laarr[start].extLocation.partitionReferenceNum, |
1023 | next, (UDF_DEFAULT_PREALLOC_BLOCKS > length ? | |
1024 | length : UDF_DEFAULT_PREALLOC_BLOCKS) - | |
1025 | currlength); | |
28de7948 | 1026 | if (numalloc) { |
4b11111a | 1027 | if (start == (c + 1)) |
1da177e4 | 1028 | laarr[start].extLength += |
4b11111a MS |
1029 | (numalloc << |
1030 | inode->i_sb->s_blocksize_bits); | |
1031 | else { | |
cb00ea35 | 1032 | memmove(&laarr[c + 2], &laarr[c + 1], |
5ca4e4be | 1033 | sizeof(struct long_ad) * (*endnum - (c + 1))); |
cb00ea35 CG |
1034 | (*endnum)++; |
1035 | laarr[c + 1].extLocation.logicalBlockNum = next; | |
1036 | laarr[c + 1].extLocation.partitionReferenceNum = | |
4b11111a MS |
1037 | laarr[c].extLocation. |
1038 | partitionReferenceNum; | |
1039 | laarr[c + 1].extLength = | |
1040 | EXT_NOT_RECORDED_ALLOCATED | | |
1041 | (numalloc << | |
1042 | inode->i_sb->s_blocksize_bits); | |
cb00ea35 | 1043 | start = c + 1; |
1da177e4 LT |
1044 | } |
1045 | ||
cb00ea35 | 1046 | for (i = start + 1; numalloc && i < *endnum; i++) { |
4b11111a MS |
1047 | int elen = ((laarr[i].extLength & |
1048 | UDF_EXTENT_LENGTH_MASK) + | |
1049 | inode->i_sb->s_blocksize - 1) >> | |
1050 | inode->i_sb->s_blocksize_bits; | |
1da177e4 | 1051 | |
cb00ea35 | 1052 | if (elen > numalloc) { |
1da177e4 | 1053 | laarr[i].extLength -= |
4b11111a MS |
1054 | (numalloc << |
1055 | inode->i_sb->s_blocksize_bits); | |
1da177e4 | 1056 | numalloc = 0; |
cb00ea35 | 1057 | } else { |
1da177e4 | 1058 | numalloc -= elen; |
cb00ea35 | 1059 | if (*endnum > (i + 1)) |
4b11111a MS |
1060 | memmove(&laarr[i], |
1061 | &laarr[i + 1], | |
5ca4e4be | 1062 | sizeof(struct long_ad) * |
4b11111a | 1063 | (*endnum - (i + 1))); |
cb00ea35 CG |
1064 | i--; |
1065 | (*endnum)--; | |
1da177e4 LT |
1066 | } |
1067 | } | |
c0b34438 | 1068 | UDF_I(inode)->i_lenExtents += |
4b11111a | 1069 | numalloc << inode->i_sb->s_blocksize_bits; |
1da177e4 LT |
1070 | } |
1071 | } | |
1072 | } | |
1073 | ||
3cc6f844 | 1074 | static void udf_merge_extents(struct inode *inode, struct kernel_long_ad *laarr, |
cb00ea35 | 1075 | int *endnum) |
1da177e4 LT |
1076 | { |
1077 | int i; | |
4b11111a MS |
1078 | unsigned long blocksize = inode->i_sb->s_blocksize; |
1079 | unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; | |
1da177e4 | 1080 | |
cb00ea35 | 1081 | for (i = 0; i < (*endnum - 1); i++) { |
5ca4e4be PE |
1082 | struct kernel_long_ad *li /*l[i]*/ = &laarr[i]; |
1083 | struct kernel_long_ad *lip1 /*l[i plus 1]*/ = &laarr[i + 1]; | |
4b11111a MS |
1084 | |
1085 | if (((li->extLength >> 30) == (lip1->extLength >> 30)) && | |
1086 | (((li->extLength >> 30) == | |
1087 | (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) || | |
1088 | ((lip1->extLocation.logicalBlockNum - | |
1089 | li->extLocation.logicalBlockNum) == | |
1090 | (((li->extLength & UDF_EXTENT_LENGTH_MASK) + | |
1091 | blocksize - 1) >> blocksize_bits)))) { | |
1092 | ||
1093 | if (((li->extLength & UDF_EXTENT_LENGTH_MASK) + | |
1094 | (lip1->extLength & UDF_EXTENT_LENGTH_MASK) + | |
1095 | blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) { | |
1096 | lip1->extLength = (lip1->extLength - | |
1097 | (li->extLength & | |
1098 | UDF_EXTENT_LENGTH_MASK) + | |
1099 | UDF_EXTENT_LENGTH_MASK) & | |
1100 | ~(blocksize - 1); | |
1101 | li->extLength = (li->extLength & | |
1102 | UDF_EXTENT_FLAG_MASK) + | |
1103 | (UDF_EXTENT_LENGTH_MASK + 1) - | |
1104 | blocksize; | |
1105 | lip1->extLocation.logicalBlockNum = | |
1106 | li->extLocation.logicalBlockNum + | |
1107 | ((li->extLength & | |
1108 | UDF_EXTENT_LENGTH_MASK) >> | |
1109 | blocksize_bits); | |
1110 | } else { | |
1111 | li->extLength = lip1->extLength + | |
1112 | (((li->extLength & | |
1113 | UDF_EXTENT_LENGTH_MASK) + | |
1114 | blocksize - 1) & ~(blocksize - 1)); | |
1115 | if (*endnum > (i + 2)) | |
1116 | memmove(&laarr[i + 1], &laarr[i + 2], | |
5ca4e4be | 1117 | sizeof(struct long_ad) * |
4b11111a MS |
1118 | (*endnum - (i + 2))); |
1119 | i--; | |
1120 | (*endnum)--; | |
1da177e4 | 1121 | } |
4b11111a MS |
1122 | } else if (((li->extLength >> 30) == |
1123 | (EXT_NOT_RECORDED_ALLOCATED >> 30)) && | |
1124 | ((lip1->extLength >> 30) == | |
1125 | (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))) { | |
97e961fd | 1126 | udf_free_blocks(inode->i_sb, inode, &li->extLocation, 0, |
4b11111a MS |
1127 | ((li->extLength & |
1128 | UDF_EXTENT_LENGTH_MASK) + | |
1129 | blocksize - 1) >> blocksize_bits); | |
1130 | li->extLocation.logicalBlockNum = 0; | |
1131 | li->extLocation.partitionReferenceNum = 0; | |
1132 | ||
1133 | if (((li->extLength & UDF_EXTENT_LENGTH_MASK) + | |
1134 | (lip1->extLength & UDF_EXTENT_LENGTH_MASK) + | |
1135 | blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) { | |
1136 | lip1->extLength = (lip1->extLength - | |
1137 | (li->extLength & | |
1138 | UDF_EXTENT_LENGTH_MASK) + | |
1139 | UDF_EXTENT_LENGTH_MASK) & | |
1140 | ~(blocksize - 1); | |
1141 | li->extLength = (li->extLength & | |
1142 | UDF_EXTENT_FLAG_MASK) + | |
1143 | (UDF_EXTENT_LENGTH_MASK + 1) - | |
1144 | blocksize; | |
cb00ea35 | 1145 | } else { |
4b11111a MS |
1146 | li->extLength = lip1->extLength + |
1147 | (((li->extLength & | |
1148 | UDF_EXTENT_LENGTH_MASK) + | |
1149 | blocksize - 1) & ~(blocksize - 1)); | |
cb00ea35 CG |
1150 | if (*endnum > (i + 2)) |
1151 | memmove(&laarr[i + 1], &laarr[i + 2], | |
5ca4e4be | 1152 | sizeof(struct long_ad) * |
4b11111a | 1153 | (*endnum - (i + 2))); |
cb00ea35 CG |
1154 | i--; |
1155 | (*endnum)--; | |
1da177e4 | 1156 | } |
4b11111a MS |
1157 | } else if ((li->extLength >> 30) == |
1158 | (EXT_NOT_RECORDED_ALLOCATED >> 30)) { | |
1159 | udf_free_blocks(inode->i_sb, inode, | |
97e961fd | 1160 | &li->extLocation, 0, |
4b11111a MS |
1161 | ((li->extLength & |
1162 | UDF_EXTENT_LENGTH_MASK) + | |
1163 | blocksize - 1) >> blocksize_bits); | |
1164 | li->extLocation.logicalBlockNum = 0; | |
1165 | li->extLocation.partitionReferenceNum = 0; | |
1166 | li->extLength = (li->extLength & | |
1167 | UDF_EXTENT_LENGTH_MASK) | | |
1168 | EXT_NOT_RECORDED_NOT_ALLOCATED; | |
1da177e4 LT |
1169 | } |
1170 | } | |
1171 | } | |
1172 | ||
3cc6f844 | 1173 | static void udf_update_extents(struct inode *inode, struct kernel_long_ad *laarr, |
cb00ea35 CG |
1174 | int startnum, int endnum, |
1175 | struct extent_position *epos) | |
1da177e4 LT |
1176 | { |
1177 | int start = 0, i; | |
5ca4e4be | 1178 | struct kernel_lb_addr tmploc; |
1da177e4 LT |
1179 | uint32_t tmplen; |
1180 | ||
cb00ea35 CG |
1181 | if (startnum > endnum) { |
1182 | for (i = 0; i < (startnum - endnum); i++) | |
6c1e4d06 | 1183 | udf_delete_aext(inode, *epos); |
cb00ea35 CG |
1184 | } else if (startnum < endnum) { |
1185 | for (i = 0; i < (endnum - startnum); i++) { | |
ff116fc8 | 1186 | udf_insert_aext(inode, *epos, laarr[i].extLocation, |
cb00ea35 | 1187 | laarr[i].extLength); |
ff116fc8 | 1188 | udf_next_aext(inode, epos, &laarr[i].extLocation, |
cb00ea35 CG |
1189 | &laarr[i].extLength, 1); |
1190 | start++; | |
1da177e4 LT |
1191 | } |
1192 | } | |
1193 | ||
cb00ea35 | 1194 | for (i = start; i < endnum; i++) { |
ff116fc8 | 1195 | udf_next_aext(inode, epos, &tmploc, &tmplen, 0); |
97e961fd | 1196 | udf_write_aext(inode, epos, &laarr[i].extLocation, |
cb00ea35 | 1197 | laarr[i].extLength, 1); |
1da177e4 LT |
1198 | } |
1199 | } | |
1200 | ||
b490bdd6 | 1201 | struct buffer_head *udf_bread(struct inode *inode, udf_pblk_t block, |
cb00ea35 | 1202 | int create, int *err) |
1da177e4 | 1203 | { |
cb00ea35 | 1204 | struct buffer_head *bh = NULL; |
1da177e4 LT |
1205 | |
1206 | bh = udf_getblk(inode, block, create, err); | |
1207 | if (!bh) | |
1208 | return NULL; | |
1209 | ||
1210 | if (buffer_uptodate(bh)) | |
1211 | return bh; | |
28de7948 | 1212 | |
dfec8a14 | 1213 | ll_rw_block(REQ_OP_READ, 0, 1, &bh); |
28de7948 | 1214 | |
1da177e4 LT |
1215 | wait_on_buffer(bh); |
1216 | if (buffer_uptodate(bh)) | |
1217 | return bh; | |
28de7948 | 1218 | |
1da177e4 LT |
1219 | brelse(bh); |
1220 | *err = -EIO; | |
1221 | return NULL; | |
1222 | } | |
1223 | ||
7e49b6f2 | 1224 | int udf_setsize(struct inode *inode, loff_t newsize) |
1da177e4 | 1225 | { |
1da177e4 | 1226 | int err; |
48d6d8ff | 1227 | struct udf_inode_info *iinfo; |
89a4d970 | 1228 | unsigned int bsize = i_blocksize(inode); |
1da177e4 LT |
1229 | |
1230 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || | |
cb00ea35 | 1231 | S_ISLNK(inode->i_mode))) |
7e49b6f2 | 1232 | return -EINVAL; |
1da177e4 | 1233 | if (IS_APPEND(inode) || IS_IMMUTABLE(inode)) |
7e49b6f2 | 1234 | return -EPERM; |
1da177e4 | 1235 | |
48d6d8ff | 1236 | iinfo = UDF_I(inode); |
7e49b6f2 | 1237 | if (newsize > inode->i_size) { |
4d0fb621 | 1238 | down_write(&iinfo->i_data_sem); |
7e49b6f2 JK |
1239 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { |
1240 | if (bsize < | |
1241 | (udf_file_entry_alloc_offset(inode) + newsize)) { | |
1242 | err = udf_expand_file_adinicb(inode); | |
d2eb8c35 | 1243 | if (err) |
7e49b6f2 | 1244 | return err; |
d2eb8c35 | 1245 | down_write(&iinfo->i_data_sem); |
bb2b6d19 | 1246 | } else { |
7e49b6f2 | 1247 | iinfo->i_lenAlloc = newsize; |
bb2b6d19 IA |
1248 | goto set_size; |
1249 | } | |
7e49b6f2 JK |
1250 | } |
1251 | err = udf_extend_file(inode, newsize); | |
1252 | if (err) { | |
1253 | up_write(&iinfo->i_data_sem); | |
1254 | return err; | |
1da177e4 | 1255 | } |
bb2b6d19 | 1256 | set_size: |
4d0fb621 | 1257 | up_write(&iinfo->i_data_sem); |
f2e95355 | 1258 | truncate_setsize(inode, newsize); |
cb00ea35 | 1259 | } else { |
7e49b6f2 JK |
1260 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { |
1261 | down_write(&iinfo->i_data_sem); | |
99600051 | 1262 | udf_clear_extent_cache(inode); |
7e49b6f2 JK |
1263 | memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr + newsize, |
1264 | 0x00, bsize - newsize - | |
1265 | udf_file_entry_alloc_offset(inode)); | |
1266 | iinfo->i_lenAlloc = newsize; | |
1267 | truncate_setsize(inode, newsize); | |
1268 | up_write(&iinfo->i_data_sem); | |
1269 | goto update_time; | |
1270 | } | |
1271 | err = block_truncate_page(inode->i_mapping, newsize, | |
1272 | udf_get_block); | |
1273 | if (err) | |
1274 | return err; | |
f2e95355 | 1275 | truncate_setsize(inode, newsize); |
4d0fb621 | 1276 | down_write(&iinfo->i_data_sem); |
99600051 | 1277 | udf_clear_extent_cache(inode); |
2b42be5e | 1278 | err = udf_truncate_extents(inode); |
4d0fb621 | 1279 | up_write(&iinfo->i_data_sem); |
2b42be5e JK |
1280 | if (err) |
1281 | return err; | |
647bd61a | 1282 | } |
7e49b6f2 | 1283 | update_time: |
c2050a45 | 1284 | inode->i_mtime = inode->i_ctime = current_time(inode); |
1da177e4 | 1285 | if (IS_SYNC(inode)) |
cb00ea35 | 1286 | udf_sync_inode(inode); |
1da177e4 LT |
1287 | else |
1288 | mark_inode_dirty(inode); | |
7e49b6f2 | 1289 | return 0; |
1da177e4 LT |
1290 | } |
1291 | ||
c03aa9f6 JK |
1292 | /* |
1293 | * Maximum length of linked list formed by ICB hierarchy. The chosen number is | |
1294 | * arbitrary - just that we hopefully don't limit any real use of rewritten | |
1295 | * inode on write-once media but avoid looping for too long on corrupted media. | |
1296 | */ | |
1297 | #define UDF_MAX_ICB_NESTING 1024 | |
1298 | ||
6174c2eb | 1299 | static int udf_read_inode(struct inode *inode, bool hidden_inode) |
1da177e4 LT |
1300 | { |
1301 | struct buffer_head *bh = NULL; | |
1302 | struct fileEntry *fe; | |
bb7720a0 | 1303 | struct extendedFileEntry *efe; |
1da177e4 | 1304 | uint16_t ident; |
48d6d8ff | 1305 | struct udf_inode_info *iinfo = UDF_I(inode); |
bb7720a0 | 1306 | struct udf_sb_info *sbi = UDF_SB(inode->i_sb); |
6d3d5e86 | 1307 | struct kernel_lb_addr *iloc = &iinfo->i_location; |
bb7720a0 | 1308 | unsigned int link_count; |
c03aa9f6 | 1309 | unsigned int indirections = 0; |
79144954 | 1310 | int bs = inode->i_sb->s_blocksize; |
6d3d5e86 | 1311 | int ret = -EIO; |
0c9850f4 | 1312 | uint32_t uid, gid; |
1da177e4 | 1313 | |
c03aa9f6 | 1314 | reread: |
1d82a56b | 1315 | if (iloc->partitionReferenceNum >= sbi->s_partitions) { |
fcbf7637 | 1316 | udf_debug("partition reference: %u > logical volume partitions: %u\n", |
1d82a56b FF |
1317 | iloc->partitionReferenceNum, sbi->s_partitions); |
1318 | return -EIO; | |
1319 | } | |
1320 | ||
6d3d5e86 JK |
1321 | if (iloc->logicalBlockNum >= |
1322 | sbi->s_partmaps[iloc->partitionReferenceNum].s_partition_len) { | |
fcbf7637 | 1323 | udf_debug("block=%u, partition=%u out of range\n", |
6d3d5e86 JK |
1324 | iloc->logicalBlockNum, iloc->partitionReferenceNum); |
1325 | return -EIO; | |
1326 | } | |
1327 | ||
1da177e4 LT |
1328 | /* |
1329 | * Set defaults, but the inode is still incomplete! | |
1330 | * Note: get_new_inode() sets the following on a new inode: | |
1331 | * i_sb = sb | |
1332 | * i_no = ino | |
1333 | * i_flags = sb->s_flags | |
1334 | * i_state = 0 | |
1335 | * clean_inode(): zero fills and sets | |
1336 | * i_count = 1 | |
1337 | * i_nlink = 1 | |
1338 | * i_op = NULL; | |
1339 | */ | |
6d3d5e86 | 1340 | bh = udf_read_ptagged(inode->i_sb, iloc, 0, &ident); |
cb00ea35 | 1341 | if (!bh) { |
fcbf7637 | 1342 | udf_err(inode->i_sb, "(ino %lu) failed !bh\n", inode->i_ino); |
6d3d5e86 | 1343 | return -EIO; |
1da177e4 LT |
1344 | } |
1345 | ||
1346 | if (ident != TAG_IDENT_FE && ident != TAG_IDENT_EFE && | |
cb00ea35 | 1347 | ident != TAG_IDENT_USE) { |
fcbf7637 | 1348 | udf_err(inode->i_sb, "(ino %lu) failed ident=%u\n", |
78ace70c | 1349 | inode->i_ino, ident); |
6d3d5e86 | 1350 | goto out; |
1da177e4 LT |
1351 | } |
1352 | ||
1353 | fe = (struct fileEntry *)bh->b_data; | |
bb7720a0 | 1354 | efe = (struct extendedFileEntry *)bh->b_data; |
1da177e4 | 1355 | |
5e0f0017 | 1356 | if (fe->icbTag.strategyType == cpu_to_le16(4096)) { |
1ab92785 | 1357 | struct buffer_head *ibh; |
1da177e4 | 1358 | |
6d3d5e86 | 1359 | ibh = udf_read_ptagged(inode->i_sb, iloc, 1, &ident); |
1ab92785 | 1360 | if (ident == TAG_IDENT_IE && ibh) { |
5ca4e4be | 1361 | struct kernel_lb_addr loc; |
1ab92785 | 1362 | struct indirectEntry *ie; |
1363 | ||
1364 | ie = (struct indirectEntry *)ibh->b_data; | |
1365 | loc = lelb_to_cpu(ie->indirectICB.extLocation); | |
1366 | ||
c03aa9f6 | 1367 | if (ie->indirectICB.extLength) { |
c03aa9f6 JK |
1368 | brelse(ibh); |
1369 | memcpy(&iinfo->i_location, &loc, | |
1370 | sizeof(struct kernel_lb_addr)); | |
1371 | if (++indirections > UDF_MAX_ICB_NESTING) { | |
1372 | udf_err(inode->i_sb, | |
1373 | "too many ICBs in ICB hierarchy" | |
1374 | " (max %d supported)\n", | |
1375 | UDF_MAX_ICB_NESTING); | |
6d3d5e86 | 1376 | goto out; |
28de7948 | 1377 | } |
6d3d5e86 | 1378 | brelse(bh); |
c03aa9f6 | 1379 | goto reread; |
1da177e4 | 1380 | } |
28de7948 | 1381 | } |
1ab92785 | 1382 | brelse(ibh); |
5e0f0017 | 1383 | } else if (fe->icbTag.strategyType != cpu_to_le16(4)) { |
fcbf7637 | 1384 | udf_err(inode->i_sb, "unsupported strategy type: %u\n", |
78ace70c | 1385 | le16_to_cpu(fe->icbTag.strategyType)); |
6d3d5e86 | 1386 | goto out; |
1da177e4 | 1387 | } |
5e0f0017 | 1388 | if (fe->icbTag.strategyType == cpu_to_le16(4)) |
48d6d8ff | 1389 | iinfo->i_strat4096 = 0; |
5e0f0017 | 1390 | else /* if (fe->icbTag.strategyType == cpu_to_le16(4096)) */ |
48d6d8ff | 1391 | iinfo->i_strat4096 = 1; |
1da177e4 | 1392 | |
48d6d8ff | 1393 | iinfo->i_alloc_type = le16_to_cpu(fe->icbTag.flags) & |
4b11111a | 1394 | ICBTAG_FLAG_AD_MASK; |
d288d958 JK |
1395 | if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_SHORT && |
1396 | iinfo->i_alloc_type != ICBTAG_FLAG_AD_LONG && | |
1397 | iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { | |
1398 | ret = -EIO; | |
1399 | goto out; | |
1400 | } | |
48d6d8ff MS |
1401 | iinfo->i_unique = 0; |
1402 | iinfo->i_lenEAttr = 0; | |
1403 | iinfo->i_lenExtents = 0; | |
1404 | iinfo->i_lenAlloc = 0; | |
1405 | iinfo->i_next_alloc_block = 0; | |
1406 | iinfo->i_next_alloc_goal = 0; | |
5e0f0017 | 1407 | if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_EFE)) { |
48d6d8ff MS |
1408 | iinfo->i_efe = 1; |
1409 | iinfo->i_use = 0; | |
79144954 | 1410 | ret = udf_alloc_i_data(inode, bs - |
6d3d5e86 JK |
1411 | sizeof(struct extendedFileEntry)); |
1412 | if (ret) | |
1413 | goto out; | |
48d6d8ff | 1414 | memcpy(iinfo->i_ext.i_data, |
4b11111a | 1415 | bh->b_data + sizeof(struct extendedFileEntry), |
79144954 | 1416 | bs - sizeof(struct extendedFileEntry)); |
5e0f0017 | 1417 | } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_FE)) { |
48d6d8ff MS |
1418 | iinfo->i_efe = 0; |
1419 | iinfo->i_use = 0; | |
79144954 | 1420 | ret = udf_alloc_i_data(inode, bs - sizeof(struct fileEntry)); |
6d3d5e86 JK |
1421 | if (ret) |
1422 | goto out; | |
48d6d8ff | 1423 | memcpy(iinfo->i_ext.i_data, |
c0b34438 | 1424 | bh->b_data + sizeof(struct fileEntry), |
79144954 | 1425 | bs - sizeof(struct fileEntry)); |
5e0f0017 | 1426 | } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_USE)) { |
48d6d8ff MS |
1427 | iinfo->i_efe = 0; |
1428 | iinfo->i_use = 1; | |
1429 | iinfo->i_lenAlloc = le32_to_cpu( | |
4b11111a MS |
1430 | ((struct unallocSpaceEntry *)bh->b_data)-> |
1431 | lengthAllocDescs); | |
79144954 | 1432 | ret = udf_alloc_i_data(inode, bs - |
6d3d5e86 JK |
1433 | sizeof(struct unallocSpaceEntry)); |
1434 | if (ret) | |
1435 | goto out; | |
48d6d8ff | 1436 | memcpy(iinfo->i_ext.i_data, |
4b11111a | 1437 | bh->b_data + sizeof(struct unallocSpaceEntry), |
79144954 | 1438 | bs - sizeof(struct unallocSpaceEntry)); |
6d3d5e86 | 1439 | return 0; |
1da177e4 LT |
1440 | } |
1441 | ||
6d3d5e86 | 1442 | ret = -EIO; |
c03cad24 | 1443 | read_lock(&sbi->s_cred_lock); |
0c9850f4 JK |
1444 | uid = le32_to_cpu(fe->uid); |
1445 | if (uid == UDF_INVALID_ID || | |
ca76d2d8 | 1446 | UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_SET)) |
0c9850f4 JK |
1447 | inode->i_uid = sbi->s_uid; |
1448 | else | |
1449 | i_uid_write(inode, uid); | |
1da177e4 | 1450 | |
0c9850f4 JK |
1451 | gid = le32_to_cpu(fe->gid); |
1452 | if (gid == UDF_INVALID_ID || | |
ca76d2d8 | 1453 | UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_SET)) |
0c9850f4 JK |
1454 | inode->i_gid = sbi->s_gid; |
1455 | else | |
1456 | i_gid_write(inode, gid); | |
1da177e4 | 1457 | |
7ac9bcd5 | 1458 | if (fe->icbTag.fileType != ICBTAG_FILE_TYPE_DIRECTORY && |
87bc730c | 1459 | sbi->s_fmode != UDF_INVALID_MODE) |
7ac9bcd5 MS |
1460 | inode->i_mode = sbi->s_fmode; |
1461 | else if (fe->icbTag.fileType == ICBTAG_FILE_TYPE_DIRECTORY && | |
87bc730c | 1462 | sbi->s_dmode != UDF_INVALID_MODE) |
7ac9bcd5 MS |
1463 | inode->i_mode = sbi->s_dmode; |
1464 | else | |
1465 | inode->i_mode = udf_convert_permissions(fe); | |
1466 | inode->i_mode &= ~sbi->s_umask; | |
c3367a1b SM |
1467 | iinfo->i_extraPerms = le32_to_cpu(fe->permissions) & ~FE_MAPPED_PERMS; |
1468 | ||
c03cad24 JK |
1469 | read_unlock(&sbi->s_cred_lock); |
1470 | ||
bfe86848 | 1471 | link_count = le16_to_cpu(fe->fileLinkCount); |
4071b913 | 1472 | if (!link_count) { |
6174c2eb JK |
1473 | if (!hidden_inode) { |
1474 | ret = -ESTALE; | |
1475 | goto out; | |
1476 | } | |
1477 | link_count = 1; | |
4071b913 | 1478 | } |
bfe86848 | 1479 | set_nlink(inode, link_count); |
c03cad24 JK |
1480 | |
1481 | inode->i_size = le64_to_cpu(fe->informationLength); | |
1482 | iinfo->i_lenExtents = inode->i_size; | |
1da177e4 | 1483 | |
48d6d8ff | 1484 | if (iinfo->i_efe == 0) { |
1da177e4 | 1485 | inode->i_blocks = le64_to_cpu(fe->logicalBlocksRecorded) << |
28de7948 | 1486 | (inode->i_sb->s_blocksize_bits - 9); |
1da177e4 | 1487 | |
c3b9cecd AB |
1488 | udf_disk_stamp_to_time(&inode->i_atime, fe->accessTime); |
1489 | udf_disk_stamp_to_time(&inode->i_mtime, fe->modificationTime); | |
1490 | udf_disk_stamp_to_time(&inode->i_ctime, fe->attrTime); | |
1da177e4 | 1491 | |
48d6d8ff MS |
1492 | iinfo->i_unique = le64_to_cpu(fe->uniqueID); |
1493 | iinfo->i_lenEAttr = le32_to_cpu(fe->lengthExtendedAttr); | |
1494 | iinfo->i_lenAlloc = le32_to_cpu(fe->lengthAllocDescs); | |
d5e2cf07 | 1495 | iinfo->i_checkpoint = le32_to_cpu(fe->checkpoint); |
ab9a3a73 SM |
1496 | iinfo->i_streamdir = 0; |
1497 | iinfo->i_lenStreams = 0; | |
cb00ea35 | 1498 | } else { |
647bd61a | 1499 | inode->i_blocks = le64_to_cpu(efe->logicalBlocksRecorded) << |
cb00ea35 | 1500 | (inode->i_sb->s_blocksize_bits - 9); |
1da177e4 | 1501 | |
c3b9cecd AB |
1502 | udf_disk_stamp_to_time(&inode->i_atime, efe->accessTime); |
1503 | udf_disk_stamp_to_time(&inode->i_mtime, efe->modificationTime); | |
0220edda | 1504 | udf_disk_stamp_to_time(&iinfo->i_crtime, efe->createTime); |
c3b9cecd | 1505 | udf_disk_stamp_to_time(&inode->i_ctime, efe->attrTime); |
1da177e4 | 1506 | |
48d6d8ff MS |
1507 | iinfo->i_unique = le64_to_cpu(efe->uniqueID); |
1508 | iinfo->i_lenEAttr = le32_to_cpu(efe->lengthExtendedAttr); | |
1509 | iinfo->i_lenAlloc = le32_to_cpu(efe->lengthAllocDescs); | |
d5e2cf07 | 1510 | iinfo->i_checkpoint = le32_to_cpu(efe->checkpoint); |
ab9a3a73 SM |
1511 | |
1512 | /* Named streams */ | |
1513 | iinfo->i_streamdir = (efe->streamDirectoryICB.extLength != 0); | |
1514 | iinfo->i_locStreamdir = | |
1515 | lelb_to_cpu(efe->streamDirectoryICB.extLocation); | |
1516 | iinfo->i_lenStreams = le64_to_cpu(efe->objectSize); | |
1517 | if (iinfo->i_lenStreams >= inode->i_size) | |
1518 | iinfo->i_lenStreams -= inode->i_size; | |
1519 | else | |
1520 | iinfo->i_lenStreams = 0; | |
1da177e4 | 1521 | } |
470cca56 | 1522 | inode->i_generation = iinfo->i_unique; |
1da177e4 | 1523 | |
23b133bd JK |
1524 | /* |
1525 | * Sanity check length of allocation descriptors and extended attrs to | |
1526 | * avoid integer overflows | |
1527 | */ | |
1528 | if (iinfo->i_lenEAttr > bs || iinfo->i_lenAlloc > bs) | |
1529 | goto out; | |
1530 | /* Now do exact checks */ | |
1531 | if (udf_file_entry_alloc_offset(inode) + iinfo->i_lenAlloc > bs) | |
1532 | goto out; | |
e159332b JK |
1533 | /* Sanity checks for files in ICB so that we don't get confused later */ |
1534 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { | |
1535 | /* | |
1536 | * For file in ICB data is stored in allocation descriptor | |
1537 | * so sizes should match | |
1538 | */ | |
1539 | if (iinfo->i_lenAlloc != inode->i_size) | |
1540 | goto out; | |
1541 | /* File in ICB has to fit in there... */ | |
79144954 | 1542 | if (inode->i_size > bs - udf_file_entry_alloc_offset(inode)) |
e159332b JK |
1543 | goto out; |
1544 | } | |
1545 | ||
cb00ea35 CG |
1546 | switch (fe->icbTag.fileType) { |
1547 | case ICBTAG_FILE_TYPE_DIRECTORY: | |
28de7948 CG |
1548 | inode->i_op = &udf_dir_inode_operations; |
1549 | inode->i_fop = &udf_dir_operations; | |
1550 | inode->i_mode |= S_IFDIR; | |
1551 | inc_nlink(inode); | |
1552 | break; | |
cb00ea35 CG |
1553 | case ICBTAG_FILE_TYPE_REALTIME: |
1554 | case ICBTAG_FILE_TYPE_REGULAR: | |
1555 | case ICBTAG_FILE_TYPE_UNDEF: | |
742e1795 | 1556 | case ICBTAG_FILE_TYPE_VAT20: |
48d6d8ff | 1557 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
28de7948 CG |
1558 | inode->i_data.a_ops = &udf_adinicb_aops; |
1559 | else | |
1560 | inode->i_data.a_ops = &udf_aops; | |
1561 | inode->i_op = &udf_file_inode_operations; | |
1562 | inode->i_fop = &udf_file_operations; | |
1563 | inode->i_mode |= S_IFREG; | |
1564 | break; | |
cb00ea35 | 1565 | case ICBTAG_FILE_TYPE_BLOCK: |
28de7948 CG |
1566 | inode->i_mode |= S_IFBLK; |
1567 | break; | |
cb00ea35 | 1568 | case ICBTAG_FILE_TYPE_CHAR: |
28de7948 CG |
1569 | inode->i_mode |= S_IFCHR; |
1570 | break; | |
cb00ea35 | 1571 | case ICBTAG_FILE_TYPE_FIFO: |
28de7948 CG |
1572 | init_special_inode(inode, inode->i_mode | S_IFIFO, 0); |
1573 | break; | |
cb00ea35 | 1574 | case ICBTAG_FILE_TYPE_SOCKET: |
28de7948 CG |
1575 | init_special_inode(inode, inode->i_mode | S_IFSOCK, 0); |
1576 | break; | |
cb00ea35 | 1577 | case ICBTAG_FILE_TYPE_SYMLINK: |
28de7948 | 1578 | inode->i_data.a_ops = &udf_symlink_aops; |
ad4d0532 | 1579 | inode->i_op = &udf_symlink_inode_operations; |
21fc61c7 | 1580 | inode_nohighmem(inode); |
6ff6b2b3 | 1581 | inode->i_mode = S_IFLNK | 0777; |
28de7948 | 1582 | break; |
bfb257a5 JK |
1583 | case ICBTAG_FILE_TYPE_MAIN: |
1584 | udf_debug("METADATA FILE-----\n"); | |
1585 | break; | |
1586 | case ICBTAG_FILE_TYPE_MIRROR: | |
1587 | udf_debug("METADATA MIRROR FILE-----\n"); | |
1588 | break; | |
1589 | case ICBTAG_FILE_TYPE_BITMAP: | |
1590 | udf_debug("METADATA BITMAP FILE-----\n"); | |
1591 | break; | |
cb00ea35 | 1592 | default: |
fcbf7637 | 1593 | udf_err(inode->i_sb, "(ino %lu) failed unknown file type=%u\n", |
78ace70c | 1594 | inode->i_ino, fe->icbTag.fileType); |
6d3d5e86 | 1595 | goto out; |
1da177e4 | 1596 | } |
cb00ea35 | 1597 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { |
4b11111a MS |
1598 | struct deviceSpec *dsea = |
1599 | (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1); | |
cb00ea35 CG |
1600 | if (dsea) { |
1601 | init_special_inode(inode, inode->i_mode, | |
4b11111a MS |
1602 | MKDEV(le32_to_cpu(dsea->majorDeviceIdent), |
1603 | le32_to_cpu(dsea->minorDeviceIdent))); | |
1da177e4 | 1604 | /* Developer ID ??? */ |
4b11111a | 1605 | } else |
6d3d5e86 | 1606 | goto out; |
1da177e4 | 1607 | } |
6d3d5e86 JK |
1608 | ret = 0; |
1609 | out: | |
bb7720a0 | 1610 | brelse(bh); |
6d3d5e86 | 1611 | return ret; |
1da177e4 LT |
1612 | } |
1613 | ||
647bd61a CG |
1614 | static int udf_alloc_i_data(struct inode *inode, size_t size) |
1615 | { | |
48d6d8ff MS |
1616 | struct udf_inode_info *iinfo = UDF_I(inode); |
1617 | iinfo->i_ext.i_data = kmalloc(size, GFP_KERNEL); | |
b5f52454 | 1618 | if (!iinfo->i_ext.i_data) |
647bd61a | 1619 | return -ENOMEM; |
647bd61a CG |
1620 | return 0; |
1621 | } | |
1622 | ||
faa17292 | 1623 | static umode_t udf_convert_permissions(struct fileEntry *fe) |
1da177e4 | 1624 | { |
faa17292 | 1625 | umode_t mode; |
1da177e4 LT |
1626 | uint32_t permissions; |
1627 | uint32_t flags; | |
1628 | ||
1629 | permissions = le32_to_cpu(fe->permissions); | |
1630 | flags = le16_to_cpu(fe->icbTag.flags); | |
1631 | ||
6ff6b2b3 FF |
1632 | mode = ((permissions) & 0007) | |
1633 | ((permissions >> 2) & 0070) | | |
1634 | ((permissions >> 4) & 0700) | | |
4b11111a MS |
1635 | ((flags & ICBTAG_FLAG_SETUID) ? S_ISUID : 0) | |
1636 | ((flags & ICBTAG_FLAG_SETGID) ? S_ISGID : 0) | | |
1637 | ((flags & ICBTAG_FLAG_STICKY) ? S_ISVTX : 0); | |
1da177e4 LT |
1638 | |
1639 | return mode; | |
1640 | } | |
1641 | ||
c3367a1b SM |
1642 | void udf_update_extra_perms(struct inode *inode, umode_t mode) |
1643 | { | |
1644 | struct udf_inode_info *iinfo = UDF_I(inode); | |
1645 | ||
1646 | /* | |
1647 | * UDF 2.01 sec. 3.3.3.3 Note 2: | |
1648 | * In Unix, delete permission tracks write | |
1649 | */ | |
1650 | iinfo->i_extraPerms &= ~FE_DELETE_PERMS; | |
1651 | if (mode & 0200) | |
1652 | iinfo->i_extraPerms |= FE_PERM_U_DELETE; | |
1653 | if (mode & 0020) | |
1654 | iinfo->i_extraPerms |= FE_PERM_G_DELETE; | |
1655 | if (mode & 0002) | |
1656 | iinfo->i_extraPerms |= FE_PERM_O_DELETE; | |
1657 | } | |
1658 | ||
a9185b41 | 1659 | int udf_write_inode(struct inode *inode, struct writeback_control *wbc) |
1da177e4 | 1660 | { |
49521de1 | 1661 | return udf_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL); |
1da177e4 LT |
1662 | } |
1663 | ||
49521de1 | 1664 | static int udf_sync_inode(struct inode *inode) |
1da177e4 LT |
1665 | { |
1666 | return udf_update_inode(inode, 1); | |
1667 | } | |
1668 | ||
c3b9cecd | 1669 | static void udf_adjust_time(struct udf_inode_info *iinfo, struct timespec64 time) |
7ed0fbd7 FF |
1670 | { |
1671 | if (iinfo->i_crtime.tv_sec > time.tv_sec || | |
1672 | (iinfo->i_crtime.tv_sec == time.tv_sec && | |
1673 | iinfo->i_crtime.tv_nsec > time.tv_nsec)) | |
1674 | iinfo->i_crtime = time; | |
1675 | } | |
1676 | ||
cb00ea35 | 1677 | static int udf_update_inode(struct inode *inode, int do_sync) |
1da177e4 LT |
1678 | { |
1679 | struct buffer_head *bh = NULL; | |
1680 | struct fileEntry *fe; | |
1681 | struct extendedFileEntry *efe; | |
b2527bfa | 1682 | uint64_t lb_recorded; |
1da177e4 LT |
1683 | uint32_t udfperms; |
1684 | uint16_t icbflags; | |
1685 | uint16_t crclen; | |
1da177e4 | 1686 | int err = 0; |
6c79e987 | 1687 | struct udf_sb_info *sbi = UDF_SB(inode->i_sb); |
4b11111a | 1688 | unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; |
48d6d8ff | 1689 | struct udf_inode_info *iinfo = UDF_I(inode); |
1da177e4 | 1690 | |
5833ded9 JK |
1691 | bh = udf_tgetblk(inode->i_sb, |
1692 | udf_get_lb_pblock(inode->i_sb, &iinfo->i_location, 0)); | |
cb00ea35 | 1693 | if (!bh) { |
aae917cd | 1694 | udf_debug("getblk failure\n"); |
0fd2ba36 | 1695 | return -EIO; |
1da177e4 LT |
1696 | } |
1697 | ||
aae917cd JK |
1698 | lock_buffer(bh); |
1699 | memset(bh->b_data, 0, inode->i_sb->s_blocksize); | |
1da177e4 LT |
1700 | fe = (struct fileEntry *)bh->b_data; |
1701 | efe = (struct extendedFileEntry *)bh->b_data; | |
1702 | ||
aae917cd | 1703 | if (iinfo->i_use) { |
1da177e4 | 1704 | struct unallocSpaceEntry *use = |
28de7948 | 1705 | (struct unallocSpaceEntry *)bh->b_data; |
1da177e4 | 1706 | |
48d6d8ff | 1707 | use->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc); |
4b11111a | 1708 | memcpy(bh->b_data + sizeof(struct unallocSpaceEntry), |
48d6d8ff | 1709 | iinfo->i_ext.i_data, inode->i_sb->s_blocksize - |
4b11111a | 1710 | sizeof(struct unallocSpaceEntry)); |
aae917cd | 1711 | use->descTag.tagIdent = cpu_to_le16(TAG_IDENT_USE); |
70f19f58 | 1712 | crclen = sizeof(struct unallocSpaceEntry); |
1da177e4 | 1713 | |
70f19f58 | 1714 | goto finish; |
1da177e4 LT |
1715 | } |
1716 | ||
4d6660eb | 1717 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_FORGET)) |
0c9850f4 | 1718 | fe->uid = cpu_to_le32(UDF_INVALID_ID); |
cb00ea35 | 1719 | else |
c2ba138a | 1720 | fe->uid = cpu_to_le32(i_uid_read(inode)); |
1da177e4 | 1721 | |
4d6660eb | 1722 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_FORGET)) |
0c9850f4 | 1723 | fe->gid = cpu_to_le32(UDF_INVALID_ID); |
cb00ea35 | 1724 | else |
c2ba138a | 1725 | fe->gid = cpu_to_le32(i_gid_read(inode)); |
1da177e4 | 1726 | |
6ff6b2b3 FF |
1727 | udfperms = ((inode->i_mode & 0007)) | |
1728 | ((inode->i_mode & 0070) << 2) | | |
1729 | ((inode->i_mode & 0700) << 4); | |
1da177e4 | 1730 | |
c3367a1b | 1731 | udfperms |= iinfo->i_extraPerms; |
1da177e4 LT |
1732 | fe->permissions = cpu_to_le32(udfperms); |
1733 | ||
8a70ee33 | 1734 | if (S_ISDIR(inode->i_mode) && inode->i_nlink > 0) |
1da177e4 LT |
1735 | fe->fileLinkCount = cpu_to_le16(inode->i_nlink - 1); |
1736 | else | |
1737 | fe->fileLinkCount = cpu_to_le16(inode->i_nlink); | |
1738 | ||
1739 | fe->informationLength = cpu_to_le64(inode->i_size); | |
1740 | ||
cb00ea35 | 1741 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { |
5ca4e4be | 1742 | struct regid *eid; |
28de7948 CG |
1743 | struct deviceSpec *dsea = |
1744 | (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1); | |
cb00ea35 | 1745 | if (!dsea) { |
1da177e4 | 1746 | dsea = (struct deviceSpec *) |
28de7948 CG |
1747 | udf_add_extendedattr(inode, |
1748 | sizeof(struct deviceSpec) + | |
5ca4e4be | 1749 | sizeof(struct regid), 12, 0x3); |
1da177e4 LT |
1750 | dsea->attrType = cpu_to_le32(12); |
1751 | dsea->attrSubtype = 1; | |
4b11111a MS |
1752 | dsea->attrLength = cpu_to_le32( |
1753 | sizeof(struct deviceSpec) + | |
5ca4e4be PE |
1754 | sizeof(struct regid)); |
1755 | dsea->impUseLength = cpu_to_le32(sizeof(struct regid)); | |
1da177e4 | 1756 | } |
5ca4e4be | 1757 | eid = (struct regid *)dsea->impUse; |
033c9da0 | 1758 | memset(eid, 0, sizeof(*eid)); |
1da177e4 LT |
1759 | strcpy(eid->ident, UDF_ID_DEVELOPER); |
1760 | eid->identSuffix[0] = UDF_OS_CLASS_UNIX; | |
1761 | eid->identSuffix[1] = UDF_OS_ID_LINUX; | |
1762 | dsea->majorDeviceIdent = cpu_to_le32(imajor(inode)); | |
1763 | dsea->minorDeviceIdent = cpu_to_le32(iminor(inode)); | |
1764 | } | |
1765 | ||
b2527bfa SN |
1766 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1767 | lb_recorded = 0; /* No extents => no blocks! */ | |
1768 | else | |
1769 | lb_recorded = | |
1770 | (inode->i_blocks + (1 << (blocksize_bits - 9)) - 1) >> | |
1771 | (blocksize_bits - 9); | |
1772 | ||
48d6d8ff | 1773 | if (iinfo->i_efe == 0) { |
c0b34438 | 1774 | memcpy(bh->b_data + sizeof(struct fileEntry), |
48d6d8ff | 1775 | iinfo->i_ext.i_data, |
cb00ea35 | 1776 | inode->i_sb->s_blocksize - sizeof(struct fileEntry)); |
b2527bfa | 1777 | fe->logicalBlocksRecorded = cpu_to_le64(lb_recorded); |
1da177e4 | 1778 | |
c3b9cecd AB |
1779 | udf_time_to_disk_stamp(&fe->accessTime, inode->i_atime); |
1780 | udf_time_to_disk_stamp(&fe->modificationTime, inode->i_mtime); | |
1781 | udf_time_to_disk_stamp(&fe->attrTime, inode->i_ctime); | |
5ca4e4be | 1782 | memset(&(fe->impIdent), 0, sizeof(struct regid)); |
1da177e4 LT |
1783 | strcpy(fe->impIdent.ident, UDF_ID_DEVELOPER); |
1784 | fe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; | |
1785 | fe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; | |
48d6d8ff MS |
1786 | fe->uniqueID = cpu_to_le64(iinfo->i_unique); |
1787 | fe->lengthExtendedAttr = cpu_to_le32(iinfo->i_lenEAttr); | |
1788 | fe->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc); | |
d5e2cf07 | 1789 | fe->checkpoint = cpu_to_le32(iinfo->i_checkpoint); |
1da177e4 LT |
1790 | fe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_FE); |
1791 | crclen = sizeof(struct fileEntry); | |
cb00ea35 | 1792 | } else { |
4b11111a | 1793 | memcpy(bh->b_data + sizeof(struct extendedFileEntry), |
48d6d8ff | 1794 | iinfo->i_ext.i_data, |
4b11111a MS |
1795 | inode->i_sb->s_blocksize - |
1796 | sizeof(struct extendedFileEntry)); | |
ab9a3a73 SM |
1797 | efe->objectSize = |
1798 | cpu_to_le64(inode->i_size + iinfo->i_lenStreams); | |
b2527bfa | 1799 | efe->logicalBlocksRecorded = cpu_to_le64(lb_recorded); |
1da177e4 | 1800 | |
ab9a3a73 SM |
1801 | if (iinfo->i_streamdir) { |
1802 | struct long_ad *icb_lad = &efe->streamDirectoryICB; | |
1803 | ||
1804 | icb_lad->extLocation = | |
1805 | cpu_to_lelb(iinfo->i_locStreamdir); | |
1806 | icb_lad->extLength = | |
1807 | cpu_to_le32(inode->i_sb->s_blocksize); | |
1808 | } | |
1809 | ||
c3b9cecd AB |
1810 | udf_adjust_time(iinfo, inode->i_atime); |
1811 | udf_adjust_time(iinfo, inode->i_mtime); | |
1812 | udf_adjust_time(iinfo, inode->i_ctime); | |
1da177e4 | 1813 | |
c3b9cecd AB |
1814 | udf_time_to_disk_stamp(&efe->accessTime, inode->i_atime); |
1815 | udf_time_to_disk_stamp(&efe->modificationTime, inode->i_mtime); | |
56774805 | 1816 | udf_time_to_disk_stamp(&efe->createTime, iinfo->i_crtime); |
c3b9cecd | 1817 | udf_time_to_disk_stamp(&efe->attrTime, inode->i_ctime); |
1da177e4 | 1818 | |
033c9da0 | 1819 | memset(&(efe->impIdent), 0, sizeof(efe->impIdent)); |
1da177e4 LT |
1820 | strcpy(efe->impIdent.ident, UDF_ID_DEVELOPER); |
1821 | efe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; | |
1822 | efe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; | |
48d6d8ff MS |
1823 | efe->uniqueID = cpu_to_le64(iinfo->i_unique); |
1824 | efe->lengthExtendedAttr = cpu_to_le32(iinfo->i_lenEAttr); | |
1825 | efe->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc); | |
d5e2cf07 | 1826 | efe->checkpoint = cpu_to_le32(iinfo->i_checkpoint); |
1da177e4 LT |
1827 | efe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_EFE); |
1828 | crclen = sizeof(struct extendedFileEntry); | |
1829 | } | |
70f19f58 SM |
1830 | |
1831 | finish: | |
48d6d8ff | 1832 | if (iinfo->i_strat4096) { |
1da177e4 LT |
1833 | fe->icbTag.strategyType = cpu_to_le16(4096); |
1834 | fe->icbTag.strategyParameter = cpu_to_le16(1); | |
1835 | fe->icbTag.numEntries = cpu_to_le16(2); | |
cb00ea35 | 1836 | } else { |
1da177e4 LT |
1837 | fe->icbTag.strategyType = cpu_to_le16(4); |
1838 | fe->icbTag.numEntries = cpu_to_le16(1); | |
1839 | } | |
1840 | ||
70f19f58 SM |
1841 | if (iinfo->i_use) |
1842 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_USE; | |
1843 | else if (S_ISDIR(inode->i_mode)) | |
1da177e4 LT |
1844 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_DIRECTORY; |
1845 | else if (S_ISREG(inode->i_mode)) | |
1846 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_REGULAR; | |
1847 | else if (S_ISLNK(inode->i_mode)) | |
1848 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_SYMLINK; | |
1849 | else if (S_ISBLK(inode->i_mode)) | |
1850 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_BLOCK; | |
1851 | else if (S_ISCHR(inode->i_mode)) | |
1852 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_CHAR; | |
1853 | else if (S_ISFIFO(inode->i_mode)) | |
1854 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_FIFO; | |
1855 | else if (S_ISSOCK(inode->i_mode)) | |
1856 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_SOCKET; | |
1857 | ||
48d6d8ff | 1858 | icbflags = iinfo->i_alloc_type | |
28de7948 CG |
1859 | ((inode->i_mode & S_ISUID) ? ICBTAG_FLAG_SETUID : 0) | |
1860 | ((inode->i_mode & S_ISGID) ? ICBTAG_FLAG_SETGID : 0) | | |
1861 | ((inode->i_mode & S_ISVTX) ? ICBTAG_FLAG_STICKY : 0) | | |
1862 | (le16_to_cpu(fe->icbTag.flags) & | |
1863 | ~(ICBTAG_FLAG_AD_MASK | ICBTAG_FLAG_SETUID | | |
1864 | ICBTAG_FLAG_SETGID | ICBTAG_FLAG_STICKY)); | |
1da177e4 LT |
1865 | |
1866 | fe->icbTag.flags = cpu_to_le16(icbflags); | |
6c79e987 | 1867 | if (sbi->s_udfrev >= 0x0200) |
1da177e4 LT |
1868 | fe->descTag.descVersion = cpu_to_le16(3); |
1869 | else | |
1870 | fe->descTag.descVersion = cpu_to_le16(2); | |
6c79e987 | 1871 | fe->descTag.tagSerialNum = cpu_to_le16(sbi->s_serial_number); |
4b11111a | 1872 | fe->descTag.tagLocation = cpu_to_le32( |
48d6d8ff | 1873 | iinfo->i_location.logicalBlockNum); |
aae917cd | 1874 | crclen += iinfo->i_lenEAttr + iinfo->i_lenAlloc - sizeof(struct tag); |
1da177e4 | 1875 | fe->descTag.descCRCLength = cpu_to_le16(crclen); |
5ca4e4be | 1876 | fe->descTag.descCRC = cpu_to_le16(crc_itu_t(0, (char *)fe + sizeof(struct tag), |
f845fced | 1877 | crclen)); |
3f2587bb | 1878 | fe->descTag.tagChecksum = udf_tag_checksum(&fe->descTag); |
1da177e4 | 1879 | |
5833ded9 | 1880 | set_buffer_uptodate(bh); |
aae917cd JK |
1881 | unlock_buffer(bh); |
1882 | ||
1da177e4 LT |
1883 | /* write the data blocks */ |
1884 | mark_buffer_dirty(bh); | |
cb00ea35 | 1885 | if (do_sync) { |
1da177e4 | 1886 | sync_dirty_buffer(bh); |
aae917cd | 1887 | if (buffer_write_io_error(bh)) { |
78ace70c JP |
1888 | udf_warn(inode->i_sb, "IO error syncing udf inode [%08lx]\n", |
1889 | inode->i_ino); | |
1da177e4 LT |
1890 | err = -EIO; |
1891 | } | |
1892 | } | |
3bf25cb4 | 1893 | brelse(bh); |
28de7948 | 1894 | |
1da177e4 LT |
1895 | return err; |
1896 | } | |
1897 | ||
6174c2eb JK |
1898 | struct inode *__udf_iget(struct super_block *sb, struct kernel_lb_addr *ino, |
1899 | bool hidden_inode) | |
1da177e4 LT |
1900 | { |
1901 | unsigned long block = udf_get_lb_pblock(sb, ino, 0); | |
1902 | struct inode *inode = iget_locked(sb, block); | |
6d3d5e86 | 1903 | int err; |
1da177e4 LT |
1904 | |
1905 | if (!inode) | |
6d3d5e86 | 1906 | return ERR_PTR(-ENOMEM); |
1da177e4 | 1907 | |
6d3d5e86 JK |
1908 | if (!(inode->i_state & I_NEW)) |
1909 | return inode; | |
1da177e4 | 1910 | |
6d3d5e86 | 1911 | memcpy(&UDF_I(inode)->i_location, ino, sizeof(struct kernel_lb_addr)); |
6174c2eb | 1912 | err = udf_read_inode(inode, hidden_inode); |
6d3d5e86 JK |
1913 | if (err < 0) { |
1914 | iget_failed(inode); | |
1915 | return ERR_PTR(err); | |
1da177e4 | 1916 | } |
6d3d5e86 | 1917 | unlock_new_inode(inode); |
1da177e4 LT |
1918 | |
1919 | return inode; | |
1da177e4 LT |
1920 | } |
1921 | ||
b490bdd6 | 1922 | int udf_setup_indirect_aext(struct inode *inode, udf_pblk_t block, |
fcea62ba | 1923 | struct extent_position *epos) |
1da177e4 | 1924 | { |
fcea62ba JK |
1925 | struct super_block *sb = inode->i_sb; |
1926 | struct buffer_head *bh; | |
1da177e4 | 1927 | struct allocExtDesc *aed; |
fcea62ba JK |
1928 | struct extent_position nepos; |
1929 | struct kernel_lb_addr neloc; | |
1930 | int ver, adsize; | |
1da177e4 | 1931 | |
fcea62ba JK |
1932 | if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
1933 | adsize = sizeof(struct short_ad); | |
1934 | else if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_LONG) | |
1935 | adsize = sizeof(struct long_ad); | |
1da177e4 | 1936 | else |
4f1b1519 | 1937 | return -EIO; |
fcea62ba JK |
1938 | |
1939 | neloc.logicalBlockNum = block; | |
1940 | neloc.partitionReferenceNum = epos->block.partitionReferenceNum; | |
1941 | ||
1942 | bh = udf_tgetblk(sb, udf_get_lb_pblock(sb, &neloc, 0)); | |
1943 | if (!bh) | |
1944 | return -EIO; | |
1945 | lock_buffer(bh); | |
1946 | memset(bh->b_data, 0x00, sb->s_blocksize); | |
1947 | set_buffer_uptodate(bh); | |
1948 | unlock_buffer(bh); | |
1949 | mark_buffer_dirty_inode(bh, inode); | |
1950 | ||
1951 | aed = (struct allocExtDesc *)(bh->b_data); | |
1952 | if (!UDF_QUERY_FLAG(sb, UDF_FLAG_STRICT)) { | |
1953 | aed->previousAllocExtLocation = | |
1954 | cpu_to_le32(epos->block.logicalBlockNum); | |
1955 | } | |
1956 | aed->lengthAllocDescs = cpu_to_le32(0); | |
1957 | if (UDF_SB(sb)->s_udfrev >= 0x0200) | |
1958 | ver = 3; | |
1da177e4 | 1959 | else |
fcea62ba JK |
1960 | ver = 2; |
1961 | udf_new_tag(bh->b_data, TAG_IDENT_AED, ver, 1, block, | |
1962 | sizeof(struct tag)); | |
1963 | ||
1964 | nepos.block = neloc; | |
1965 | nepos.offset = sizeof(struct allocExtDesc); | |
1966 | nepos.bh = bh; | |
1967 | ||
1968 | /* | |
1969 | * Do we have to copy current last extent to make space for indirect | |
1970 | * one? | |
1971 | */ | |
1972 | if (epos->offset + adsize > sb->s_blocksize) { | |
1973 | struct kernel_lb_addr cp_loc; | |
1974 | uint32_t cp_len; | |
1975 | int cp_type; | |
1976 | ||
1977 | epos->offset -= adsize; | |
1978 | cp_type = udf_current_aext(inode, epos, &cp_loc, &cp_len, 0); | |
1979 | cp_len |= ((uint32_t)cp_type) << 30; | |
1980 | ||
1981 | __udf_add_aext(inode, &nepos, &cp_loc, cp_len, 1); | |
1982 | udf_write_aext(inode, epos, &nepos.block, | |
800552ce | 1983 | sb->s_blocksize | EXT_NEXT_EXTENT_ALLOCDESCS, 0); |
fcea62ba JK |
1984 | } else { |
1985 | __udf_add_aext(inode, epos, &nepos.block, | |
800552ce | 1986 | sb->s_blocksize | EXT_NEXT_EXTENT_ALLOCDESCS, 0); |
fcea62ba JK |
1987 | } |
1988 | ||
1989 | brelse(epos->bh); | |
1990 | *epos = nepos; | |
1991 | ||
1992 | return 0; | |
1993 | } | |
1994 | ||
1995 | /* | |
1996 | * Append extent at the given position - should be the first free one in inode | |
1997 | * / indirect extent. This function assumes there is enough space in the inode | |
1998 | * or indirect extent. Use udf_add_aext() if you didn't check for this before. | |
1999 | */ | |
2000 | int __udf_add_aext(struct inode *inode, struct extent_position *epos, | |
2001 | struct kernel_lb_addr *eloc, uint32_t elen, int inc) | |
2002 | { | |
2003 | struct udf_inode_info *iinfo = UDF_I(inode); | |
2004 | struct allocExtDesc *aed; | |
2005 | int adsize; | |
1da177e4 | 2006 | |
48d6d8ff | 2007 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
5ca4e4be | 2008 | adsize = sizeof(struct short_ad); |
48d6d8ff | 2009 | else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
5ca4e4be | 2010 | adsize = sizeof(struct long_ad); |
1da177e4 | 2011 | else |
7e49b6f2 | 2012 | return -EIO; |
1da177e4 | 2013 | |
fcea62ba JK |
2014 | if (!epos->bh) { |
2015 | WARN_ON(iinfo->i_lenAlloc != | |
2016 | epos->offset - udf_file_entry_alloc_offset(inode)); | |
2017 | } else { | |
2018 | aed = (struct allocExtDesc *)epos->bh->b_data; | |
2019 | WARN_ON(le32_to_cpu(aed->lengthAllocDescs) != | |
2020 | epos->offset - sizeof(struct allocExtDesc)); | |
2021 | WARN_ON(epos->offset + adsize > inode->i_sb->s_blocksize); | |
1da177e4 LT |
2022 | } |
2023 | ||
7e49b6f2 | 2024 | udf_write_aext(inode, epos, eloc, elen, inc); |
1da177e4 | 2025 | |
cb00ea35 | 2026 | if (!epos->bh) { |
48d6d8ff | 2027 | iinfo->i_lenAlloc += adsize; |
1da177e4 | 2028 | mark_inode_dirty(inode); |
cb00ea35 | 2029 | } else { |
ff116fc8 | 2030 | aed = (struct allocExtDesc *)epos->bh->b_data; |
c2104fda | 2031 | le32_add_cpu(&aed->lengthAllocDescs, adsize); |
4b11111a MS |
2032 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
2033 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) | |
2034 | udf_update_tag(epos->bh->b_data, | |
2035 | epos->offset + (inc ? 0 : adsize)); | |
1da177e4 | 2036 | else |
4b11111a MS |
2037 | udf_update_tag(epos->bh->b_data, |
2038 | sizeof(struct allocExtDesc)); | |
ff116fc8 | 2039 | mark_buffer_dirty_inode(epos->bh, inode); |
1da177e4 LT |
2040 | } |
2041 | ||
7e49b6f2 | 2042 | return 0; |
1da177e4 LT |
2043 | } |
2044 | ||
fcea62ba JK |
2045 | /* |
2046 | * Append extent at given position - should be the first free one in inode | |
2047 | * / indirect extent. Takes care of allocating and linking indirect blocks. | |
2048 | */ | |
2049 | int udf_add_aext(struct inode *inode, struct extent_position *epos, | |
2050 | struct kernel_lb_addr *eloc, uint32_t elen, int inc) | |
2051 | { | |
2052 | int adsize; | |
2053 | struct super_block *sb = inode->i_sb; | |
2054 | ||
2055 | if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_SHORT) | |
2056 | adsize = sizeof(struct short_ad); | |
2057 | else if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_LONG) | |
2058 | adsize = sizeof(struct long_ad); | |
2059 | else | |
2060 | return -EIO; | |
2061 | ||
2062 | if (epos->offset + (2 * adsize) > sb->s_blocksize) { | |
2063 | int err; | |
b490bdd6 | 2064 | udf_pblk_t new_block; |
fcea62ba JK |
2065 | |
2066 | new_block = udf_new_block(sb, NULL, | |
2067 | epos->block.partitionReferenceNum, | |
2068 | epos->block.logicalBlockNum, &err); | |
2069 | if (!new_block) | |
2070 | return -ENOSPC; | |
2071 | ||
2072 | err = udf_setup_indirect_aext(inode, new_block, epos); | |
2073 | if (err) | |
2074 | return err; | |
2075 | } | |
2076 | ||
2077 | return __udf_add_aext(inode, epos, eloc, elen, inc); | |
2078 | } | |
2079 | ||
7e49b6f2 JK |
2080 | void udf_write_aext(struct inode *inode, struct extent_position *epos, |
2081 | struct kernel_lb_addr *eloc, uint32_t elen, int inc) | |
1da177e4 LT |
2082 | { |
2083 | int adsize; | |
2084 | uint8_t *ptr; | |
5ca4e4be PE |
2085 | struct short_ad *sad; |
2086 | struct long_ad *lad; | |
48d6d8ff | 2087 | struct udf_inode_info *iinfo = UDF_I(inode); |
1da177e4 | 2088 | |
ff116fc8 | 2089 | if (!epos->bh) |
48d6d8ff | 2090 | ptr = iinfo->i_ext.i_data + epos->offset - |
4b11111a | 2091 | udf_file_entry_alloc_offset(inode) + |
48d6d8ff | 2092 | iinfo->i_lenEAttr; |
1da177e4 | 2093 | else |
ff116fc8 | 2094 | ptr = epos->bh->b_data + epos->offset; |
1da177e4 | 2095 | |
48d6d8ff | 2096 | switch (iinfo->i_alloc_type) { |
cb00ea35 | 2097 | case ICBTAG_FLAG_AD_SHORT: |
5ca4e4be | 2098 | sad = (struct short_ad *)ptr; |
28de7948 | 2099 | sad->extLength = cpu_to_le32(elen); |
97e961fd | 2100 | sad->extPosition = cpu_to_le32(eloc->logicalBlockNum); |
5ca4e4be | 2101 | adsize = sizeof(struct short_ad); |
28de7948 | 2102 | break; |
cb00ea35 | 2103 | case ICBTAG_FLAG_AD_LONG: |
5ca4e4be | 2104 | lad = (struct long_ad *)ptr; |
28de7948 | 2105 | lad->extLength = cpu_to_le32(elen); |
97e961fd | 2106 | lad->extLocation = cpu_to_lelb(*eloc); |
28de7948 | 2107 | memset(lad->impUse, 0x00, sizeof(lad->impUse)); |
5ca4e4be | 2108 | adsize = sizeof(struct long_ad); |
28de7948 | 2109 | break; |
cb00ea35 | 2110 | default: |
7e49b6f2 | 2111 | return; |
1da177e4 LT |
2112 | } |
2113 | ||
cb00ea35 | 2114 | if (epos->bh) { |
28de7948 | 2115 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
6c79e987 | 2116 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) { |
4b11111a MS |
2117 | struct allocExtDesc *aed = |
2118 | (struct allocExtDesc *)epos->bh->b_data; | |
ff116fc8 | 2119 | udf_update_tag(epos->bh->b_data, |
4b11111a MS |
2120 | le32_to_cpu(aed->lengthAllocDescs) + |
2121 | sizeof(struct allocExtDesc)); | |
1da177e4 | 2122 | } |
ff116fc8 | 2123 | mark_buffer_dirty_inode(epos->bh, inode); |
28de7948 | 2124 | } else { |
1da177e4 | 2125 | mark_inode_dirty(inode); |
28de7948 | 2126 | } |
1da177e4 LT |
2127 | |
2128 | if (inc) | |
ff116fc8 | 2129 | epos->offset += adsize; |
1da177e4 LT |
2130 | } |
2131 | ||
b0918d9f VN |
2132 | /* |
2133 | * Only 1 indirect extent in a row really makes sense but allow upto 16 in case | |
2134 | * someone does some weird stuff. | |
2135 | */ | |
2136 | #define UDF_MAX_INDIR_EXTS 16 | |
2137 | ||
4b11111a | 2138 | int8_t udf_next_aext(struct inode *inode, struct extent_position *epos, |
5ca4e4be | 2139 | struct kernel_lb_addr *eloc, uint32_t *elen, int inc) |
1da177e4 LT |
2140 | { |
2141 | int8_t etype; | |
b0918d9f | 2142 | unsigned int indirections = 0; |
1da177e4 | 2143 | |
ff116fc8 | 2144 | while ((etype = udf_current_aext(inode, epos, eloc, elen, inc)) == |
800552ce | 2145 | (EXT_NEXT_EXTENT_ALLOCDESCS >> 30)) { |
b490bdd6 | 2146 | udf_pblk_t block; |
b0918d9f VN |
2147 | |
2148 | if (++indirections > UDF_MAX_INDIR_EXTS) { | |
2149 | udf_err(inode->i_sb, | |
2150 | "too many indirect extents in inode %lu\n", | |
2151 | inode->i_ino); | |
2152 | return -1; | |
2153 | } | |
2154 | ||
ff116fc8 JK |
2155 | epos->block = *eloc; |
2156 | epos->offset = sizeof(struct allocExtDesc); | |
3bf25cb4 | 2157 | brelse(epos->bh); |
97e961fd | 2158 | block = udf_get_lb_pblock(inode->i_sb, &epos->block, 0); |
4b11111a MS |
2159 | epos->bh = udf_tread(inode->i_sb, block); |
2160 | if (!epos->bh) { | |
fcbf7637 | 2161 | udf_debug("reading block %u failed!\n", block); |
1da177e4 LT |
2162 | return -1; |
2163 | } | |
2164 | } | |
2165 | ||
2166 | return etype; | |
2167 | } | |
2168 | ||
4b11111a | 2169 | int8_t udf_current_aext(struct inode *inode, struct extent_position *epos, |
5ca4e4be | 2170 | struct kernel_lb_addr *eloc, uint32_t *elen, int inc) |
1da177e4 LT |
2171 | { |
2172 | int alen; | |
2173 | int8_t etype; | |
2174 | uint8_t *ptr; | |
5ca4e4be PE |
2175 | struct short_ad *sad; |
2176 | struct long_ad *lad; | |
48d6d8ff | 2177 | struct udf_inode_info *iinfo = UDF_I(inode); |
28de7948 | 2178 | |
cb00ea35 | 2179 | if (!epos->bh) { |
ff116fc8 JK |
2180 | if (!epos->offset) |
2181 | epos->offset = udf_file_entry_alloc_offset(inode); | |
48d6d8ff | 2182 | ptr = iinfo->i_ext.i_data + epos->offset - |
4b11111a | 2183 | udf_file_entry_alloc_offset(inode) + |
48d6d8ff | 2184 | iinfo->i_lenEAttr; |
4b11111a | 2185 | alen = udf_file_entry_alloc_offset(inode) + |
48d6d8ff | 2186 | iinfo->i_lenAlloc; |
cb00ea35 | 2187 | } else { |
ff116fc8 JK |
2188 | if (!epos->offset) |
2189 | epos->offset = sizeof(struct allocExtDesc); | |
2190 | ptr = epos->bh->b_data + epos->offset; | |
28de7948 | 2191 | alen = sizeof(struct allocExtDesc) + |
4b11111a MS |
2192 | le32_to_cpu(((struct allocExtDesc *)epos->bh->b_data)-> |
2193 | lengthAllocDescs); | |
1da177e4 LT |
2194 | } |
2195 | ||
48d6d8ff | 2196 | switch (iinfo->i_alloc_type) { |
cb00ea35 | 2197 | case ICBTAG_FLAG_AD_SHORT: |
4b11111a MS |
2198 | sad = udf_get_fileshortad(ptr, alen, &epos->offset, inc); |
2199 | if (!sad) | |
28de7948 CG |
2200 | return -1; |
2201 | etype = le32_to_cpu(sad->extLength) >> 30; | |
2202 | eloc->logicalBlockNum = le32_to_cpu(sad->extPosition); | |
4b11111a | 2203 | eloc->partitionReferenceNum = |
48d6d8ff | 2204 | iinfo->i_location.partitionReferenceNum; |
28de7948 CG |
2205 | *elen = le32_to_cpu(sad->extLength) & UDF_EXTENT_LENGTH_MASK; |
2206 | break; | |
cb00ea35 | 2207 | case ICBTAG_FLAG_AD_LONG: |
4b11111a MS |
2208 | lad = udf_get_filelongad(ptr, alen, &epos->offset, inc); |
2209 | if (!lad) | |
1da177e4 | 2210 | return -1; |
28de7948 CG |
2211 | etype = le32_to_cpu(lad->extLength) >> 30; |
2212 | *eloc = lelb_to_cpu(lad->extLocation); | |
2213 | *elen = le32_to_cpu(lad->extLength) & UDF_EXTENT_LENGTH_MASK; | |
2214 | break; | |
2215 | default: | |
fcbf7637 | 2216 | udf_debug("alloc_type = %u unsupported\n", iinfo->i_alloc_type); |
28de7948 | 2217 | return -1; |
1da177e4 LT |
2218 | } |
2219 | ||
2220 | return etype; | |
2221 | } | |
2222 | ||
28de7948 | 2223 | static int8_t udf_insert_aext(struct inode *inode, struct extent_position epos, |
5ca4e4be | 2224 | struct kernel_lb_addr neloc, uint32_t nelen) |
1da177e4 | 2225 | { |
5ca4e4be | 2226 | struct kernel_lb_addr oeloc; |
1da177e4 LT |
2227 | uint32_t oelen; |
2228 | int8_t etype; | |
2229 | ||
ff116fc8 | 2230 | if (epos.bh) |
3bf25cb4 | 2231 | get_bh(epos.bh); |
1da177e4 | 2232 | |
cb00ea35 | 2233 | while ((etype = udf_next_aext(inode, &epos, &oeloc, &oelen, 0)) != -1) { |
97e961fd | 2234 | udf_write_aext(inode, &epos, &neloc, nelen, 1); |
1da177e4 LT |
2235 | neloc = oeloc; |
2236 | nelen = (etype << 30) | oelen; | |
2237 | } | |
97e961fd | 2238 | udf_add_aext(inode, &epos, &neloc, nelen, 1); |
3bf25cb4 | 2239 | brelse(epos.bh); |
28de7948 | 2240 | |
1da177e4 LT |
2241 | return (nelen >> 30); |
2242 | } | |
2243 | ||
6c1e4d06 | 2244 | int8_t udf_delete_aext(struct inode *inode, struct extent_position epos) |
1da177e4 | 2245 | { |
ff116fc8 JK |
2246 | struct extent_position oepos; |
2247 | int adsize; | |
1da177e4 LT |
2248 | int8_t etype; |
2249 | struct allocExtDesc *aed; | |
48d6d8ff | 2250 | struct udf_inode_info *iinfo; |
6c1e4d06 JK |
2251 | struct kernel_lb_addr eloc; |
2252 | uint32_t elen; | |
1da177e4 | 2253 | |
cb00ea35 | 2254 | if (epos.bh) { |
3bf25cb4 JK |
2255 | get_bh(epos.bh); |
2256 | get_bh(epos.bh); | |
1da177e4 LT |
2257 | } |
2258 | ||
48d6d8ff MS |
2259 | iinfo = UDF_I(inode); |
2260 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) | |
5ca4e4be | 2261 | adsize = sizeof(struct short_ad); |
48d6d8ff | 2262 | else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
5ca4e4be | 2263 | adsize = sizeof(struct long_ad); |
1da177e4 LT |
2264 | else |
2265 | adsize = 0; | |
2266 | ||
ff116fc8 JK |
2267 | oepos = epos; |
2268 | if (udf_next_aext(inode, &epos, &eloc, &elen, 1) == -1) | |
1da177e4 LT |
2269 | return -1; |
2270 | ||
cb00ea35 | 2271 | while ((etype = udf_next_aext(inode, &epos, &eloc, &elen, 1)) != -1) { |
97e961fd | 2272 | udf_write_aext(inode, &oepos, &eloc, (etype << 30) | elen, 1); |
cb00ea35 | 2273 | if (oepos.bh != epos.bh) { |
ff116fc8 | 2274 | oepos.block = epos.block; |
3bf25cb4 JK |
2275 | brelse(oepos.bh); |
2276 | get_bh(epos.bh); | |
ff116fc8 JK |
2277 | oepos.bh = epos.bh; |
2278 | oepos.offset = epos.offset - adsize; | |
1da177e4 LT |
2279 | } |
2280 | } | |
5ca4e4be | 2281 | memset(&eloc, 0x00, sizeof(struct kernel_lb_addr)); |
1da177e4 LT |
2282 | elen = 0; |
2283 | ||
cb00ea35 | 2284 | if (epos.bh != oepos.bh) { |
97e961fd PE |
2285 | udf_free_blocks(inode->i_sb, inode, &epos.block, 0, 1); |
2286 | udf_write_aext(inode, &oepos, &eloc, elen, 1); | |
2287 | udf_write_aext(inode, &oepos, &eloc, elen, 1); | |
cb00ea35 | 2288 | if (!oepos.bh) { |
48d6d8ff | 2289 | iinfo->i_lenAlloc -= (adsize * 2); |
1da177e4 | 2290 | mark_inode_dirty(inode); |
cb00ea35 | 2291 | } else { |
ff116fc8 | 2292 | aed = (struct allocExtDesc *)oepos.bh->b_data; |
c2104fda | 2293 | le32_add_cpu(&aed->lengthAllocDescs, -(2 * adsize)); |
28de7948 | 2294 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
6c79e987 | 2295 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) |
4b11111a MS |
2296 | udf_update_tag(oepos.bh->b_data, |
2297 | oepos.offset - (2 * adsize)); | |
1da177e4 | 2298 | else |
4b11111a MS |
2299 | udf_update_tag(oepos.bh->b_data, |
2300 | sizeof(struct allocExtDesc)); | |
ff116fc8 | 2301 | mark_buffer_dirty_inode(oepos.bh, inode); |
1da177e4 | 2302 | } |
cb00ea35 | 2303 | } else { |
97e961fd | 2304 | udf_write_aext(inode, &oepos, &eloc, elen, 1); |
cb00ea35 | 2305 | if (!oepos.bh) { |
48d6d8ff | 2306 | iinfo->i_lenAlloc -= adsize; |
1da177e4 | 2307 | mark_inode_dirty(inode); |
cb00ea35 | 2308 | } else { |
ff116fc8 | 2309 | aed = (struct allocExtDesc *)oepos.bh->b_data; |
c2104fda | 2310 | le32_add_cpu(&aed->lengthAllocDescs, -adsize); |
28de7948 | 2311 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
6c79e987 | 2312 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) |
4b11111a MS |
2313 | udf_update_tag(oepos.bh->b_data, |
2314 | epos.offset - adsize); | |
1da177e4 | 2315 | else |
4b11111a MS |
2316 | udf_update_tag(oepos.bh->b_data, |
2317 | sizeof(struct allocExtDesc)); | |
ff116fc8 | 2318 | mark_buffer_dirty_inode(oepos.bh, inode); |
1da177e4 LT |
2319 | } |
2320 | } | |
647bd61a | 2321 | |
3bf25cb4 JK |
2322 | brelse(epos.bh); |
2323 | brelse(oepos.bh); | |
28de7948 | 2324 | |
1da177e4 LT |
2325 | return (elen >> 30); |
2326 | } | |
2327 | ||
4b11111a | 2328 | int8_t inode_bmap(struct inode *inode, sector_t block, |
5ca4e4be | 2329 | struct extent_position *pos, struct kernel_lb_addr *eloc, |
4b11111a | 2330 | uint32_t *elen, sector_t *offset) |
1da177e4 | 2331 | { |
4b11111a | 2332 | unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; |
bbc9abd2 | 2333 | loff_t lbcount = 0, bcount = (loff_t) block << blocksize_bits; |
1da177e4 | 2334 | int8_t etype; |
48d6d8ff | 2335 | struct udf_inode_info *iinfo; |
1da177e4 | 2336 | |
48d6d8ff | 2337 | iinfo = UDF_I(inode); |
99600051 NJ |
2338 | if (!udf_read_extent_cache(inode, bcount, &lbcount, pos)) { |
2339 | pos->offset = 0; | |
2340 | pos->block = iinfo->i_location; | |
2341 | pos->bh = NULL; | |
2342 | } | |
1da177e4 | 2343 | *elen = 0; |
cb00ea35 | 2344 | do { |
4b11111a MS |
2345 | etype = udf_next_aext(inode, pos, eloc, elen, 1); |
2346 | if (etype == -1) { | |
2347 | *offset = (bcount - lbcount) >> blocksize_bits; | |
48d6d8ff | 2348 | iinfo->i_lenExtents = lbcount; |
1da177e4 LT |
2349 | return -1; |
2350 | } | |
2351 | lbcount += *elen; | |
2352 | } while (lbcount <= bcount); | |
99600051 | 2353 | /* update extent cache */ |
b31c9ed9 | 2354 | udf_update_extent_cache(inode, lbcount - *elen, pos); |
4b11111a | 2355 | *offset = (bcount + *elen - lbcount) >> blocksize_bits; |
1da177e4 LT |
2356 | |
2357 | return etype; | |
2358 | } | |
2359 | ||
b490bdd6 | 2360 | udf_pblk_t udf_block_map(struct inode *inode, sector_t block) |
1da177e4 | 2361 | { |
5ca4e4be | 2362 | struct kernel_lb_addr eloc; |
ff116fc8 | 2363 | uint32_t elen; |
60448b1d | 2364 | sector_t offset; |
28de7948 | 2365 | struct extent_position epos = {}; |
b490bdd6 | 2366 | udf_pblk_t ret; |
1da177e4 | 2367 | |
4d0fb621 | 2368 | down_read(&UDF_I(inode)->i_data_sem); |
1da177e4 | 2369 | |
4b11111a MS |
2370 | if (inode_bmap(inode, block, &epos, &eloc, &elen, &offset) == |
2371 | (EXT_RECORDED_ALLOCATED >> 30)) | |
97e961fd | 2372 | ret = udf_get_lb_pblock(inode->i_sb, &eloc, offset); |
1da177e4 LT |
2373 | else |
2374 | ret = 0; | |
2375 | ||
4d0fb621 | 2376 | up_read(&UDF_I(inode)->i_data_sem); |
3bf25cb4 | 2377 | brelse(epos.bh); |
1da177e4 LT |
2378 | |
2379 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_VARCONV)) | |
2380 | return udf_fixed_to_variable(ret); | |
2381 | else | |
2382 | return ret; | |
2383 | } |