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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 | ||
46 | MODULE_AUTHOR("Ben Fennema"); | |
47 | MODULE_DESCRIPTION("Universal Disk Format Filesystem"); | |
48 | MODULE_LICENSE("GPL"); | |
49 | ||
50 | #define EXTENT_MERGE_SIZE 5 | |
51 | ||
faa17292 | 52 | static umode_t udf_convert_permissions(struct fileEntry *); |
1da177e4 | 53 | static int udf_update_inode(struct inode *, int); |
49521de1 | 54 | static int udf_sync_inode(struct inode *inode); |
647bd61a | 55 | static int udf_alloc_i_data(struct inode *inode, size_t size); |
7b0b0933 | 56 | static sector_t inode_getblk(struct inode *, sector_t, int *, int *); |
ff116fc8 | 57 | static int8_t udf_insert_aext(struct inode *, struct extent_position, |
5ca4e4be | 58 | struct kernel_lb_addr, uint32_t); |
1da177e4 | 59 | static void udf_split_extents(struct inode *, int *, int, int, |
5ca4e4be | 60 | struct kernel_long_ad[EXTENT_MERGE_SIZE], int *); |
1da177e4 | 61 | static void udf_prealloc_extents(struct inode *, int, int, |
5ca4e4be | 62 | struct kernel_long_ad[EXTENT_MERGE_SIZE], int *); |
1da177e4 | 63 | static void udf_merge_extents(struct inode *, |
5ca4e4be | 64 | struct kernel_long_ad[EXTENT_MERGE_SIZE], int *); |
1da177e4 | 65 | static void udf_update_extents(struct inode *, |
5ca4e4be | 66 | struct kernel_long_ad[EXTENT_MERGE_SIZE], int, int, |
cb00ea35 | 67 | struct extent_position *); |
1da177e4 LT |
68 | static int udf_get_block(struct inode *, sector_t, struct buffer_head *, int); |
69 | ||
99600051 NJ |
70 | static void __udf_clear_extent_cache(struct inode *inode) |
71 | { | |
72 | struct udf_inode_info *iinfo = UDF_I(inode); | |
73 | ||
74 | if (iinfo->cached_extent.lstart != -1) { | |
75 | brelse(iinfo->cached_extent.epos.bh); | |
76 | iinfo->cached_extent.lstart = -1; | |
77 | } | |
78 | } | |
79 | ||
80 | /* Invalidate extent cache */ | |
81 | static void udf_clear_extent_cache(struct inode *inode) | |
82 | { | |
83 | struct udf_inode_info *iinfo = UDF_I(inode); | |
84 | ||
85 | spin_lock(&iinfo->i_extent_cache_lock); | |
86 | __udf_clear_extent_cache(inode); | |
87 | spin_unlock(&iinfo->i_extent_cache_lock); | |
88 | } | |
89 | ||
90 | /* Return contents of extent cache */ | |
91 | static int udf_read_extent_cache(struct inode *inode, loff_t bcount, | |
92 | loff_t *lbcount, struct extent_position *pos) | |
93 | { | |
94 | struct udf_inode_info *iinfo = UDF_I(inode); | |
95 | int ret = 0; | |
96 | ||
97 | spin_lock(&iinfo->i_extent_cache_lock); | |
98 | if ((iinfo->cached_extent.lstart <= bcount) && | |
99 | (iinfo->cached_extent.lstart != -1)) { | |
100 | /* Cache hit */ | |
101 | *lbcount = iinfo->cached_extent.lstart; | |
102 | memcpy(pos, &iinfo->cached_extent.epos, | |
103 | sizeof(struct extent_position)); | |
104 | if (pos->bh) | |
105 | get_bh(pos->bh); | |
106 | ret = 1; | |
107 | } | |
108 | spin_unlock(&iinfo->i_extent_cache_lock); | |
109 | return ret; | |
110 | } | |
111 | ||
112 | /* Add extent to extent cache */ | |
113 | static void udf_update_extent_cache(struct inode *inode, loff_t estart, | |
114 | struct extent_position *pos, int next_epos) | |
115 | { | |
116 | struct udf_inode_info *iinfo = UDF_I(inode); | |
117 | ||
118 | spin_lock(&iinfo->i_extent_cache_lock); | |
119 | /* Invalidate previously cached extent */ | |
120 | __udf_clear_extent_cache(inode); | |
121 | if (pos->bh) | |
122 | get_bh(pos->bh); | |
123 | memcpy(&iinfo->cached_extent.epos, pos, | |
124 | sizeof(struct extent_position)); | |
125 | iinfo->cached_extent.lstart = estart; | |
126 | if (next_epos) | |
127 | switch (iinfo->i_alloc_type) { | |
128 | case ICBTAG_FLAG_AD_SHORT: | |
129 | iinfo->cached_extent.epos.offset -= | |
130 | sizeof(struct short_ad); | |
131 | break; | |
132 | case ICBTAG_FLAG_AD_LONG: | |
133 | iinfo->cached_extent.epos.offset -= | |
134 | sizeof(struct long_ad); | |
135 | } | |
136 | spin_unlock(&iinfo->i_extent_cache_lock); | |
137 | } | |
b1e32126 | 138 | |
3aac2b62 | 139 | void udf_evict_inode(struct inode *inode) |
1da177e4 | 140 | { |
2c948b3f | 141 | struct udf_inode_info *iinfo = UDF_I(inode); |
3aac2b62 AV |
142 | int want_delete = 0; |
143 | ||
3aac2b62 AV |
144 | if (!inode->i_nlink && !is_bad_inode(inode)) { |
145 | want_delete = 1; | |
7e49b6f2 | 146 | udf_setsize(inode, 0); |
3aac2b62 | 147 | udf_update_inode(inode, IS_SYNC(inode)); |
91b0abe3 JW |
148 | } |
149 | truncate_inode_pages_final(&inode->i_data); | |
3aac2b62 | 150 | invalidate_inode_buffers(inode); |
dbd5768f | 151 | clear_inode(inode); |
2c948b3f JK |
152 | if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB && |
153 | inode->i_size != iinfo->i_lenExtents) { | |
78ace70c JP |
154 | 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", |
155 | inode->i_ino, inode->i_mode, | |
156 | (unsigned long long)inode->i_size, | |
157 | (unsigned long long)iinfo->i_lenExtents); | |
1da177e4 | 158 | } |
48d6d8ff MS |
159 | kfree(iinfo->i_ext.i_data); |
160 | iinfo->i_ext.i_data = NULL; | |
99600051 | 161 | udf_clear_extent_cache(inode); |
3aac2b62 | 162 | if (want_delete) { |
3aac2b62 | 163 | udf_free_inode(inode); |
3aac2b62 | 164 | } |
1da177e4 LT |
165 | } |
166 | ||
5eec54fc IA |
167 | static void udf_write_failed(struct address_space *mapping, loff_t to) |
168 | { | |
169 | struct inode *inode = mapping->host; | |
170 | struct udf_inode_info *iinfo = UDF_I(inode); | |
171 | loff_t isize = inode->i_size; | |
172 | ||
173 | if (to > isize) { | |
7caef267 | 174 | truncate_pagecache(inode, isize); |
5eec54fc IA |
175 | if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { |
176 | down_write(&iinfo->i_data_sem); | |
99600051 | 177 | udf_clear_extent_cache(inode); |
5eec54fc IA |
178 | udf_truncate_extents(inode); |
179 | up_write(&iinfo->i_data_sem); | |
180 | } | |
181 | } | |
182 | } | |
183 | ||
1da177e4 LT |
184 | static int udf_writepage(struct page *page, struct writeback_control *wbc) |
185 | { | |
186 | return block_write_full_page(page, udf_get_block, wbc); | |
187 | } | |
188 | ||
378b8e1a NJ |
189 | static int udf_writepages(struct address_space *mapping, |
190 | struct writeback_control *wbc) | |
191 | { | |
192 | return mpage_writepages(mapping, wbc, udf_get_block); | |
193 | } | |
194 | ||
1da177e4 LT |
195 | static int udf_readpage(struct file *file, struct page *page) |
196 | { | |
bc112323 NJ |
197 | return mpage_readpage(page, udf_get_block); |
198 | } | |
199 | ||
200 | static int udf_readpages(struct file *file, struct address_space *mapping, | |
201 | struct list_head *pages, unsigned nr_pages) | |
202 | { | |
203 | return mpage_readpages(mapping, pages, nr_pages, udf_get_block); | |
1da177e4 LT |
204 | } |
205 | ||
be021ee4 NP |
206 | static int udf_write_begin(struct file *file, struct address_space *mapping, |
207 | loff_t pos, unsigned len, unsigned flags, | |
208 | struct page **pagep, void **fsdata) | |
1da177e4 | 209 | { |
155130a4 CH |
210 | int ret; |
211 | ||
212 | ret = block_write_begin(mapping, pos, len, flags, pagep, udf_get_block); | |
5eec54fc IA |
213 | if (unlikely(ret)) |
214 | udf_write_failed(mapping, pos + len); | |
215 | return ret; | |
216 | } | |
155130a4 | 217 | |
c8b8e32d | 218 | static ssize_t udf_direct_IO(struct kiocb *iocb, struct iov_iter *iter) |
5eec54fc IA |
219 | { |
220 | struct file *file = iocb->ki_filp; | |
221 | struct address_space *mapping = file->f_mapping; | |
222 | struct inode *inode = mapping->host; | |
a6cbcd4a | 223 | size_t count = iov_iter_count(iter); |
5eec54fc IA |
224 | ssize_t ret; |
225 | ||
c8b8e32d | 226 | ret = blockdev_direct_IO(iocb, inode, iter, udf_get_block); |
6f673763 | 227 | if (unlikely(ret < 0 && iov_iter_rw(iter) == WRITE)) |
c8b8e32d | 228 | udf_write_failed(mapping, iocb->ki_pos + count); |
155130a4 | 229 | return ret; |
1da177e4 LT |
230 | } |
231 | ||
232 | static sector_t udf_bmap(struct address_space *mapping, sector_t block) | |
233 | { | |
cb00ea35 | 234 | return generic_block_bmap(mapping, block, udf_get_block); |
1da177e4 LT |
235 | } |
236 | ||
f5e54d6e | 237 | const struct address_space_operations udf_aops = { |
28de7948 | 238 | .readpage = udf_readpage, |
bc112323 | 239 | .readpages = udf_readpages, |
28de7948 | 240 | .writepage = udf_writepage, |
378b8e1a | 241 | .writepages = udf_writepages, |
5eec54fc IA |
242 | .write_begin = udf_write_begin, |
243 | .write_end = generic_write_end, | |
244 | .direct_IO = udf_direct_IO, | |
28de7948 | 245 | .bmap = udf_bmap, |
1da177e4 LT |
246 | }; |
247 | ||
d2eb8c35 JK |
248 | /* |
249 | * Expand file stored in ICB to a normal one-block-file | |
250 | * | |
251 | * This function requires i_data_sem for writing and releases it. | |
252 | * This function requires i_mutex held | |
253 | */ | |
7e49b6f2 | 254 | int udf_expand_file_adinicb(struct inode *inode) |
1da177e4 LT |
255 | { |
256 | struct page *page; | |
257 | char *kaddr; | |
48d6d8ff | 258 | struct udf_inode_info *iinfo = UDF_I(inode); |
7e49b6f2 | 259 | int err; |
1da177e4 LT |
260 | struct writeback_control udf_wbc = { |
261 | .sync_mode = WB_SYNC_NONE, | |
262 | .nr_to_write = 1, | |
263 | }; | |
264 | ||
5955102c | 265 | WARN_ON_ONCE(!inode_is_locked(inode)); |
48d6d8ff | 266 | if (!iinfo->i_lenAlloc) { |
1da177e4 | 267 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) |
48d6d8ff | 268 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT; |
1da177e4 | 269 | else |
48d6d8ff | 270 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG; |
7e49b6f2 JK |
271 | /* from now on we have normal address_space methods */ |
272 | inode->i_data.a_ops = &udf_aops; | |
d2eb8c35 | 273 | up_write(&iinfo->i_data_sem); |
1da177e4 | 274 | mark_inode_dirty(inode); |
7e49b6f2 | 275 | return 0; |
1da177e4 | 276 | } |
d2eb8c35 JK |
277 | /* |
278 | * Release i_data_sem so that we can lock a page - page lock ranks | |
279 | * above i_data_sem. i_mutex still protects us against file changes. | |
280 | */ | |
281 | up_write(&iinfo->i_data_sem); | |
1da177e4 | 282 | |
7e49b6f2 JK |
283 | page = find_or_create_page(inode->i_mapping, 0, GFP_NOFS); |
284 | if (!page) | |
285 | return -ENOMEM; | |
cd7619d6 | 286 | |
cb00ea35 | 287 | if (!PageUptodate(page)) { |
1da177e4 | 288 | kaddr = kmap(page); |
48d6d8ff | 289 | memset(kaddr + iinfo->i_lenAlloc, 0x00, |
09cbfeaf | 290 | PAGE_SIZE - iinfo->i_lenAlloc); |
48d6d8ff MS |
291 | memcpy(kaddr, iinfo->i_ext.i_data + iinfo->i_lenEAttr, |
292 | iinfo->i_lenAlloc); | |
1da177e4 LT |
293 | flush_dcache_page(page); |
294 | SetPageUptodate(page); | |
295 | kunmap(page); | |
296 | } | |
d2eb8c35 | 297 | down_write(&iinfo->i_data_sem); |
48d6d8ff MS |
298 | memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr, 0x00, |
299 | iinfo->i_lenAlloc); | |
300 | iinfo->i_lenAlloc = 0; | |
1da177e4 | 301 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) |
48d6d8ff | 302 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT; |
1da177e4 | 303 | else |
48d6d8ff | 304 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG; |
7e49b6f2 JK |
305 | /* from now on we have normal address_space methods */ |
306 | inode->i_data.a_ops = &udf_aops; | |
d2eb8c35 | 307 | up_write(&iinfo->i_data_sem); |
7e49b6f2 JK |
308 | err = inode->i_data.a_ops->writepage(page, &udf_wbc); |
309 | if (err) { | |
310 | /* Restore everything back so that we don't lose data... */ | |
311 | lock_page(page); | |
312 | kaddr = kmap(page); | |
d2eb8c35 | 313 | down_write(&iinfo->i_data_sem); |
7e49b6f2 JK |
314 | memcpy(iinfo->i_ext.i_data + iinfo->i_lenEAttr, kaddr, |
315 | inode->i_size); | |
316 | kunmap(page); | |
317 | unlock_page(page); | |
318 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB; | |
319 | inode->i_data.a_ops = &udf_adinicb_aops; | |
d2eb8c35 | 320 | up_write(&iinfo->i_data_sem); |
7e49b6f2 | 321 | } |
09cbfeaf | 322 | put_page(page); |
1da177e4 | 323 | mark_inode_dirty(inode); |
7e49b6f2 JK |
324 | |
325 | return err; | |
1da177e4 LT |
326 | } |
327 | ||
cb00ea35 CG |
328 | struct buffer_head *udf_expand_dir_adinicb(struct inode *inode, int *block, |
329 | int *err) | |
1da177e4 LT |
330 | { |
331 | int newblock; | |
ff116fc8 | 332 | struct buffer_head *dbh = NULL; |
5ca4e4be | 333 | struct kernel_lb_addr eloc; |
1da177e4 | 334 | uint8_t alloctype; |
ff116fc8 | 335 | struct extent_position epos; |
1da177e4 LT |
336 | |
337 | struct udf_fileident_bh sfibh, dfibh; | |
af793295 JK |
338 | loff_t f_pos = udf_ext0_offset(inode); |
339 | int size = udf_ext0_offset(inode) + inode->i_size; | |
1da177e4 | 340 | struct fileIdentDesc cfi, *sfi, *dfi; |
48d6d8ff | 341 | struct udf_inode_info *iinfo = UDF_I(inode); |
1da177e4 LT |
342 | |
343 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) | |
344 | alloctype = ICBTAG_FLAG_AD_SHORT; | |
345 | else | |
346 | alloctype = ICBTAG_FLAG_AD_LONG; | |
347 | ||
cb00ea35 | 348 | if (!inode->i_size) { |
48d6d8ff | 349 | iinfo->i_alloc_type = alloctype; |
1da177e4 LT |
350 | mark_inode_dirty(inode); |
351 | return NULL; | |
352 | } | |
353 | ||
354 | /* alloc block, and copy data to it */ | |
355 | *block = udf_new_block(inode->i_sb, inode, | |
48d6d8ff MS |
356 | iinfo->i_location.partitionReferenceNum, |
357 | iinfo->i_location.logicalBlockNum, err); | |
1da177e4 LT |
358 | if (!(*block)) |
359 | return NULL; | |
360 | newblock = udf_get_pblock(inode->i_sb, *block, | |
48d6d8ff | 361 | iinfo->i_location.partitionReferenceNum, |
c0b34438 | 362 | 0); |
1da177e4 LT |
363 | if (!newblock) |
364 | return NULL; | |
365 | dbh = udf_tgetblk(inode->i_sb, newblock); | |
366 | if (!dbh) | |
367 | return NULL; | |
368 | lock_buffer(dbh); | |
369 | memset(dbh->b_data, 0x00, inode->i_sb->s_blocksize); | |
370 | set_buffer_uptodate(dbh); | |
371 | unlock_buffer(dbh); | |
372 | mark_buffer_dirty_inode(dbh, inode); | |
373 | ||
4b11111a | 374 | sfibh.soffset = sfibh.eoffset = |
af793295 | 375 | f_pos & (inode->i_sb->s_blocksize - 1); |
ff116fc8 | 376 | sfibh.sbh = sfibh.ebh = NULL; |
1da177e4 LT |
377 | dfibh.soffset = dfibh.eoffset = 0; |
378 | dfibh.sbh = dfibh.ebh = dbh; | |
af793295 | 379 | while (f_pos < size) { |
48d6d8ff | 380 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB; |
4b11111a MS |
381 | sfi = udf_fileident_read(inode, &f_pos, &sfibh, &cfi, NULL, |
382 | NULL, NULL, NULL); | |
cb00ea35 | 383 | if (!sfi) { |
3bf25cb4 | 384 | brelse(dbh); |
1da177e4 LT |
385 | return NULL; |
386 | } | |
48d6d8ff | 387 | iinfo->i_alloc_type = alloctype; |
1da177e4 LT |
388 | sfi->descTag.tagLocation = cpu_to_le32(*block); |
389 | dfibh.soffset = dfibh.eoffset; | |
390 | dfibh.eoffset += (sfibh.eoffset - sfibh.soffset); | |
391 | dfi = (struct fileIdentDesc *)(dbh->b_data + dfibh.soffset); | |
392 | if (udf_write_fi(inode, sfi, dfi, &dfibh, sfi->impUse, | |
4b11111a MS |
393 | sfi->fileIdent + |
394 | le16_to_cpu(sfi->lengthOfImpUse))) { | |
48d6d8ff | 395 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB; |
3bf25cb4 | 396 | brelse(dbh); |
1da177e4 LT |
397 | return NULL; |
398 | } | |
399 | } | |
400 | mark_buffer_dirty_inode(dbh, inode); | |
401 | ||
48d6d8ff MS |
402 | memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr, 0, |
403 | iinfo->i_lenAlloc); | |
404 | iinfo->i_lenAlloc = 0; | |
1da177e4 | 405 | eloc.logicalBlockNum = *block; |
4b11111a | 406 | eloc.partitionReferenceNum = |
48d6d8ff | 407 | iinfo->i_location.partitionReferenceNum; |
2c948b3f | 408 | iinfo->i_lenExtents = inode->i_size; |
ff116fc8 | 409 | epos.bh = NULL; |
48d6d8ff | 410 | epos.block = iinfo->i_location; |
ff116fc8 | 411 | epos.offset = udf_file_entry_alloc_offset(inode); |
2c948b3f | 412 | udf_add_aext(inode, &epos, &eloc, inode->i_size, 0); |
1da177e4 LT |
413 | /* UniqueID stuff */ |
414 | ||
3bf25cb4 | 415 | brelse(epos.bh); |
1da177e4 LT |
416 | mark_inode_dirty(inode); |
417 | return dbh; | |
418 | } | |
419 | ||
cb00ea35 CG |
420 | static int udf_get_block(struct inode *inode, sector_t block, |
421 | struct buffer_head *bh_result, int create) | |
1da177e4 LT |
422 | { |
423 | int err, new; | |
1ed16171 | 424 | sector_t phys = 0; |
48d6d8ff | 425 | struct udf_inode_info *iinfo; |
1da177e4 | 426 | |
cb00ea35 | 427 | if (!create) { |
1da177e4 LT |
428 | phys = udf_block_map(inode, block); |
429 | if (phys) | |
430 | map_bh(bh_result, inode->i_sb, phys); | |
431 | return 0; | |
432 | } | |
433 | ||
434 | err = -EIO; | |
435 | new = 0; | |
48d6d8ff | 436 | iinfo = UDF_I(inode); |
4d0fb621 AIB |
437 | |
438 | down_write(&iinfo->i_data_sem); | |
48d6d8ff MS |
439 | if (block == iinfo->i_next_alloc_block + 1) { |
440 | iinfo->i_next_alloc_block++; | |
441 | iinfo->i_next_alloc_goal++; | |
1da177e4 LT |
442 | } |
443 | ||
99600051 | 444 | udf_clear_extent_cache(inode); |
7b0b0933 JK |
445 | phys = inode_getblk(inode, block, &err, &new); |
446 | if (!phys) | |
1da177e4 | 447 | goto abort; |
1da177e4 LT |
448 | |
449 | if (new) | |
450 | set_buffer_new(bh_result); | |
451 | map_bh(bh_result, inode->i_sb, phys); | |
28de7948 CG |
452 | |
453 | abort: | |
4d0fb621 | 454 | up_write(&iinfo->i_data_sem); |
1da177e4 | 455 | return err; |
1da177e4 LT |
456 | } |
457 | ||
cb00ea35 CG |
458 | static struct buffer_head *udf_getblk(struct inode *inode, long block, |
459 | int create, int *err) | |
1da177e4 | 460 | { |
28de7948 | 461 | struct buffer_head *bh; |
1da177e4 LT |
462 | struct buffer_head dummy; |
463 | ||
464 | dummy.b_state = 0; | |
465 | dummy.b_blocknr = -1000; | |
466 | *err = udf_get_block(inode, block, &dummy, create); | |
cb00ea35 | 467 | if (!*err && buffer_mapped(&dummy)) { |
1da177e4 | 468 | bh = sb_getblk(inode->i_sb, dummy.b_blocknr); |
cb00ea35 | 469 | if (buffer_new(&dummy)) { |
1da177e4 LT |
470 | lock_buffer(bh); |
471 | memset(bh->b_data, 0x00, inode->i_sb->s_blocksize); | |
472 | set_buffer_uptodate(bh); | |
473 | unlock_buffer(bh); | |
474 | mark_buffer_dirty_inode(bh, inode); | |
475 | } | |
476 | return bh; | |
477 | } | |
28de7948 | 478 | |
1da177e4 LT |
479 | return NULL; |
480 | } | |
481 | ||
31170b6a | 482 | /* Extend the file by 'blocks' blocks, return the number of extents added */ |
7e49b6f2 JK |
483 | static int udf_do_extend_file(struct inode *inode, |
484 | struct extent_position *last_pos, | |
485 | struct kernel_long_ad *last_ext, | |
486 | sector_t blocks) | |
31170b6a JK |
487 | { |
488 | sector_t add; | |
489 | int count = 0, fake = !(last_ext->extLength & UDF_EXTENT_LENGTH_MASK); | |
490 | struct super_block *sb = inode->i_sb; | |
5ca4e4be | 491 | struct kernel_lb_addr prealloc_loc = {}; |
31170b6a | 492 | int prealloc_len = 0; |
48d6d8ff | 493 | struct udf_inode_info *iinfo; |
7e49b6f2 | 494 | int err; |
31170b6a JK |
495 | |
496 | /* The previous extent is fake and we should not extend by anything | |
497 | * - there's nothing to do... */ | |
498 | if (!blocks && fake) | |
499 | return 0; | |
28de7948 | 500 | |
48d6d8ff | 501 | iinfo = UDF_I(inode); |
31170b6a JK |
502 | /* Round the last extent up to a multiple of block size */ |
503 | if (last_ext->extLength & (sb->s_blocksize - 1)) { | |
504 | last_ext->extLength = | |
28de7948 CG |
505 | (last_ext->extLength & UDF_EXTENT_FLAG_MASK) | |
506 | (((last_ext->extLength & UDF_EXTENT_LENGTH_MASK) + | |
507 | sb->s_blocksize - 1) & ~(sb->s_blocksize - 1)); | |
48d6d8ff MS |
508 | iinfo->i_lenExtents = |
509 | (iinfo->i_lenExtents + sb->s_blocksize - 1) & | |
28de7948 | 510 | ~(sb->s_blocksize - 1); |
31170b6a | 511 | } |
28de7948 | 512 | |
31170b6a | 513 | /* Last extent are just preallocated blocks? */ |
4b11111a MS |
514 | if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) == |
515 | EXT_NOT_RECORDED_ALLOCATED) { | |
31170b6a JK |
516 | /* Save the extent so that we can reattach it to the end */ |
517 | prealloc_loc = last_ext->extLocation; | |
518 | prealloc_len = last_ext->extLength; | |
519 | /* Mark the extent as a hole */ | |
520 | last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | | |
28de7948 | 521 | (last_ext->extLength & UDF_EXTENT_LENGTH_MASK); |
31170b6a | 522 | last_ext->extLocation.logicalBlockNum = 0; |
4b11111a | 523 | last_ext->extLocation.partitionReferenceNum = 0; |
31170b6a | 524 | } |
28de7948 | 525 | |
31170b6a | 526 | /* Can we merge with the previous extent? */ |
4b11111a MS |
527 | if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) == |
528 | EXT_NOT_RECORDED_NOT_ALLOCATED) { | |
529 | add = ((1 << 30) - sb->s_blocksize - | |
530 | (last_ext->extLength & UDF_EXTENT_LENGTH_MASK)) >> | |
531 | sb->s_blocksize_bits; | |
31170b6a JK |
532 | if (add > blocks) |
533 | add = blocks; | |
534 | blocks -= add; | |
535 | last_ext->extLength += add << sb->s_blocksize_bits; | |
536 | } | |
537 | ||
538 | if (fake) { | |
97e961fd | 539 | udf_add_aext(inode, last_pos, &last_ext->extLocation, |
cb00ea35 | 540 | last_ext->extLength, 1); |
31170b6a | 541 | count++; |
6c371578 JK |
542 | } else { |
543 | struct kernel_lb_addr tmploc; | |
544 | uint32_t tmplen; | |
545 | ||
97e961fd | 546 | udf_write_aext(inode, last_pos, &last_ext->extLocation, |
4b11111a | 547 | last_ext->extLength, 1); |
6c371578 JK |
548 | /* |
549 | * We've rewritten the last extent but there may be empty | |
550 | * indirect extent after it - enter it. | |
551 | */ | |
552 | udf_next_aext(inode, last_pos, &tmploc, &tmplen, 0); | |
553 | } | |
28de7948 | 554 | |
31170b6a JK |
555 | /* Managed to do everything necessary? */ |
556 | if (!blocks) | |
557 | goto out; | |
558 | ||
559 | /* All further extents will be NOT_RECORDED_NOT_ALLOCATED */ | |
560 | last_ext->extLocation.logicalBlockNum = 0; | |
4b11111a | 561 | last_ext->extLocation.partitionReferenceNum = 0; |
28de7948 | 562 | add = (1 << (30-sb->s_blocksize_bits)) - 1; |
4b11111a MS |
563 | last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | |
564 | (add << sb->s_blocksize_bits); | |
28de7948 | 565 | |
31170b6a JK |
566 | /* Create enough extents to cover the whole hole */ |
567 | while (blocks > add) { | |
568 | blocks -= add; | |
7e49b6f2 JK |
569 | err = udf_add_aext(inode, last_pos, &last_ext->extLocation, |
570 | last_ext->extLength, 1); | |
571 | if (err) | |
572 | return err; | |
31170b6a JK |
573 | count++; |
574 | } | |
575 | if (blocks) { | |
576 | last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | | |
28de7948 | 577 | (blocks << sb->s_blocksize_bits); |
7e49b6f2 JK |
578 | err = udf_add_aext(inode, last_pos, &last_ext->extLocation, |
579 | last_ext->extLength, 1); | |
580 | if (err) | |
581 | return err; | |
31170b6a JK |
582 | count++; |
583 | } | |
28de7948 CG |
584 | |
585 | out: | |
31170b6a JK |
586 | /* Do we have some preallocated blocks saved? */ |
587 | if (prealloc_len) { | |
7e49b6f2 JK |
588 | err = udf_add_aext(inode, last_pos, &prealloc_loc, |
589 | prealloc_len, 1); | |
590 | if (err) | |
591 | return err; | |
31170b6a JK |
592 | last_ext->extLocation = prealloc_loc; |
593 | last_ext->extLength = prealloc_len; | |
594 | count++; | |
595 | } | |
28de7948 | 596 | |
31170b6a | 597 | /* last_pos should point to the last written extent... */ |
48d6d8ff | 598 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
5ca4e4be | 599 | last_pos->offset -= sizeof(struct short_ad); |
48d6d8ff | 600 | else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
5ca4e4be | 601 | last_pos->offset -= sizeof(struct long_ad); |
31170b6a | 602 | else |
7e49b6f2 | 603 | return -EIO; |
28de7948 | 604 | |
31170b6a JK |
605 | return count; |
606 | } | |
607 | ||
7e49b6f2 JK |
608 | static int udf_extend_file(struct inode *inode, loff_t newsize) |
609 | { | |
610 | ||
611 | struct extent_position epos; | |
612 | struct kernel_lb_addr eloc; | |
613 | uint32_t elen; | |
614 | int8_t etype; | |
615 | struct super_block *sb = inode->i_sb; | |
616 | sector_t first_block = newsize >> sb->s_blocksize_bits, offset; | |
617 | int adsize; | |
618 | struct udf_inode_info *iinfo = UDF_I(inode); | |
619 | struct kernel_long_ad extent; | |
620 | int err; | |
621 | ||
622 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) | |
623 | adsize = sizeof(struct short_ad); | |
624 | else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) | |
625 | adsize = sizeof(struct long_ad); | |
626 | else | |
627 | BUG(); | |
628 | ||
629 | etype = inode_bmap(inode, first_block, &epos, &eloc, &elen, &offset); | |
630 | ||
631 | /* File has extent covering the new size (could happen when extending | |
632 | * inside a block)? */ | |
633 | if (etype != -1) | |
634 | return 0; | |
635 | if (newsize & (sb->s_blocksize - 1)) | |
636 | offset++; | |
637 | /* Extended file just to the boundary of the last file block? */ | |
638 | if (offset == 0) | |
639 | return 0; | |
640 | ||
641 | /* Truncate is extending the file by 'offset' blocks */ | |
642 | if ((!epos.bh && epos.offset == udf_file_entry_alloc_offset(inode)) || | |
643 | (epos.bh && epos.offset == sizeof(struct allocExtDesc))) { | |
644 | /* File has no extents at all or has empty last | |
645 | * indirect extent! Create a fake extent... */ | |
646 | extent.extLocation.logicalBlockNum = 0; | |
647 | extent.extLocation.partitionReferenceNum = 0; | |
648 | extent.extLength = EXT_NOT_RECORDED_NOT_ALLOCATED; | |
649 | } else { | |
650 | epos.offset -= adsize; | |
651 | etype = udf_next_aext(inode, &epos, &extent.extLocation, | |
652 | &extent.extLength, 0); | |
653 | extent.extLength |= etype << 30; | |
654 | } | |
655 | err = udf_do_extend_file(inode, &epos, &extent, offset); | |
656 | if (err < 0) | |
657 | goto out; | |
658 | err = 0; | |
659 | iinfo->i_lenExtents = newsize; | |
660 | out: | |
661 | brelse(epos.bh); | |
662 | return err; | |
663 | } | |
664 | ||
7b0b0933 JK |
665 | static sector_t inode_getblk(struct inode *inode, sector_t block, |
666 | int *err, int *new) | |
1da177e4 | 667 | { |
5ca4e4be | 668 | struct kernel_long_ad laarr[EXTENT_MERGE_SIZE]; |
ff116fc8 | 669 | struct extent_position prev_epos, cur_epos, next_epos; |
1da177e4 | 670 | int count = 0, startnum = 0, endnum = 0; |
85d71244 | 671 | uint32_t elen = 0, tmpelen; |
5ca4e4be | 672 | struct kernel_lb_addr eloc, tmpeloc; |
1da177e4 | 673 | int c = 1; |
60448b1d JK |
674 | loff_t lbcount = 0, b_off = 0; |
675 | uint32_t newblocknum, newblock; | |
676 | sector_t offset = 0; | |
1da177e4 | 677 | int8_t etype; |
48d6d8ff MS |
678 | struct udf_inode_info *iinfo = UDF_I(inode); |
679 | int goal = 0, pgoal = iinfo->i_location.logicalBlockNum; | |
31170b6a | 680 | int lastblock = 0; |
fb719c59 | 681 | bool isBeyondEOF; |
1da177e4 | 682 | |
7b0b0933 JK |
683 | *err = 0; |
684 | *new = 0; | |
ff116fc8 | 685 | prev_epos.offset = udf_file_entry_alloc_offset(inode); |
48d6d8ff | 686 | prev_epos.block = iinfo->i_location; |
ff116fc8 JK |
687 | prev_epos.bh = NULL; |
688 | cur_epos = next_epos = prev_epos; | |
28de7948 | 689 | b_off = (loff_t)block << inode->i_sb->s_blocksize_bits; |
1da177e4 LT |
690 | |
691 | /* find the extent which contains the block we are looking for. | |
cb00ea35 CG |
692 | alternate between laarr[0] and laarr[1] for locations of the |
693 | current extent, and the previous extent */ | |
694 | do { | |
695 | if (prev_epos.bh != cur_epos.bh) { | |
3bf25cb4 JK |
696 | brelse(prev_epos.bh); |
697 | get_bh(cur_epos.bh); | |
ff116fc8 | 698 | prev_epos.bh = cur_epos.bh; |
1da177e4 | 699 | } |
cb00ea35 | 700 | if (cur_epos.bh != next_epos.bh) { |
3bf25cb4 JK |
701 | brelse(cur_epos.bh); |
702 | get_bh(next_epos.bh); | |
ff116fc8 | 703 | cur_epos.bh = next_epos.bh; |
1da177e4 LT |
704 | } |
705 | ||
706 | lbcount += elen; | |
707 | ||
ff116fc8 JK |
708 | prev_epos.block = cur_epos.block; |
709 | cur_epos.block = next_epos.block; | |
1da177e4 | 710 | |
ff116fc8 JK |
711 | prev_epos.offset = cur_epos.offset; |
712 | cur_epos.offset = next_epos.offset; | |
1da177e4 | 713 | |
4b11111a MS |
714 | etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 1); |
715 | if (etype == -1) | |
1da177e4 LT |
716 | break; |
717 | ||
718 | c = !c; | |
719 | ||
720 | laarr[c].extLength = (etype << 30) | elen; | |
721 | laarr[c].extLocation = eloc; | |
722 | ||
723 | if (etype != (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) | |
724 | pgoal = eloc.logicalBlockNum + | |
28de7948 CG |
725 | ((elen + inode->i_sb->s_blocksize - 1) >> |
726 | inode->i_sb->s_blocksize_bits); | |
1da177e4 | 727 | |
cb00ea35 | 728 | count++; |
1da177e4 LT |
729 | } while (lbcount + elen <= b_off); |
730 | ||
731 | b_off -= lbcount; | |
732 | offset = b_off >> inode->i_sb->s_blocksize_bits; | |
85d71244 JK |
733 | /* |
734 | * Move prev_epos and cur_epos into indirect extent if we are at | |
735 | * the pointer to it | |
736 | */ | |
737 | udf_next_aext(inode, &prev_epos, &tmpeloc, &tmpelen, 0); | |
738 | udf_next_aext(inode, &cur_epos, &tmpeloc, &tmpelen, 0); | |
1da177e4 LT |
739 | |
740 | /* if the extent is allocated and recorded, return the block | |
cb00ea35 | 741 | if the extent is not a multiple of the blocksize, round up */ |
1da177e4 | 742 | |
cb00ea35 CG |
743 | if (etype == (EXT_RECORDED_ALLOCATED >> 30)) { |
744 | if (elen & (inode->i_sb->s_blocksize - 1)) { | |
1da177e4 | 745 | elen = EXT_RECORDED_ALLOCATED | |
28de7948 CG |
746 | ((elen + inode->i_sb->s_blocksize - 1) & |
747 | ~(inode->i_sb->s_blocksize - 1)); | |
7e49b6f2 | 748 | udf_write_aext(inode, &cur_epos, &eloc, elen, 1); |
1da177e4 | 749 | } |
3bf25cb4 JK |
750 | brelse(prev_epos.bh); |
751 | brelse(cur_epos.bh); | |
752 | brelse(next_epos.bh); | |
97e961fd | 753 | newblock = udf_get_lb_pblock(inode->i_sb, &eloc, offset); |
7b0b0933 | 754 | return newblock; |
1da177e4 LT |
755 | } |
756 | ||
31170b6a | 757 | /* Are we beyond EOF? */ |
cb00ea35 | 758 | if (etype == -1) { |
31170b6a | 759 | int ret; |
6981498d | 760 | isBeyondEOF = true; |
31170b6a JK |
761 | if (count) { |
762 | if (c) | |
763 | laarr[0] = laarr[1]; | |
764 | startnum = 1; | |
cb00ea35 | 765 | } else { |
31170b6a | 766 | /* Create a fake extent when there's not one */ |
4b11111a | 767 | memset(&laarr[0].extLocation, 0x00, |
5ca4e4be | 768 | sizeof(struct kernel_lb_addr)); |
31170b6a | 769 | laarr[0].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED; |
7e49b6f2 | 770 | /* Will udf_do_extend_file() create real extent from |
4b11111a | 771 | a fake one? */ |
31170b6a JK |
772 | startnum = (offset > 0); |
773 | } | |
774 | /* Create extents for the hole between EOF and offset */ | |
7e49b6f2 JK |
775 | ret = udf_do_extend_file(inode, &prev_epos, laarr, offset); |
776 | if (ret < 0) { | |
31170b6a JK |
777 | brelse(prev_epos.bh); |
778 | brelse(cur_epos.bh); | |
779 | brelse(next_epos.bh); | |
7e49b6f2 | 780 | *err = ret; |
7b0b0933 | 781 | return 0; |
31170b6a JK |
782 | } |
783 | c = 0; | |
784 | offset = 0; | |
785 | count += ret; | |
786 | /* We are not covered by a preallocated extent? */ | |
4b11111a MS |
787 | if ((laarr[0].extLength & UDF_EXTENT_FLAG_MASK) != |
788 | EXT_NOT_RECORDED_ALLOCATED) { | |
31170b6a JK |
789 | /* Is there any real extent? - otherwise we overwrite |
790 | * the fake one... */ | |
791 | if (count) | |
792 | c = !c; | |
793 | laarr[c].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | | |
28de7948 | 794 | inode->i_sb->s_blocksize; |
4b11111a | 795 | memset(&laarr[c].extLocation, 0x00, |
5ca4e4be | 796 | sizeof(struct kernel_lb_addr)); |
cb00ea35 | 797 | count++; |
31170b6a | 798 | } |
cb00ea35 | 799 | endnum = c + 1; |
1da177e4 | 800 | lastblock = 1; |
cb00ea35 | 801 | } else { |
6981498d | 802 | isBeyondEOF = false; |
1da177e4 LT |
803 | endnum = startnum = ((count > 2) ? 2 : count); |
804 | ||
4b11111a MS |
805 | /* if the current extent is in position 0, |
806 | swap it with the previous */ | |
cb00ea35 | 807 | if (!c && count != 1) { |
31170b6a JK |
808 | laarr[2] = laarr[0]; |
809 | laarr[0] = laarr[1]; | |
810 | laarr[1] = laarr[2]; | |
811 | c = 1; | |
812 | } | |
1da177e4 | 813 | |
4b11111a MS |
814 | /* if the current block is located in an extent, |
815 | read the next extent */ | |
816 | etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 0); | |
817 | if (etype != -1) { | |
cb00ea35 CG |
818 | laarr[c + 1].extLength = (etype << 30) | elen; |
819 | laarr[c + 1].extLocation = eloc; | |
820 | count++; | |
821 | startnum++; | |
822 | endnum++; | |
4b11111a | 823 | } else |
1da177e4 LT |
824 | lastblock = 1; |
825 | } | |
1da177e4 LT |
826 | |
827 | /* if the current extent is not recorded but allocated, get the | |
28de7948 | 828 | * block in the extent corresponding to the requested block */ |
4b11111a | 829 | if ((laarr[c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30)) |
1da177e4 | 830 | newblocknum = laarr[c].extLocation.logicalBlockNum + offset; |
4b11111a | 831 | else { /* otherwise, allocate a new block */ |
48d6d8ff MS |
832 | if (iinfo->i_next_alloc_block == block) |
833 | goal = iinfo->i_next_alloc_goal; | |
1da177e4 | 834 | |
cb00ea35 | 835 | if (!goal) { |
4b11111a | 836 | if (!(goal = pgoal)) /* XXX: what was intended here? */ |
48d6d8ff | 837 | goal = iinfo->i_location.logicalBlockNum + 1; |
1da177e4 LT |
838 | } |
839 | ||
4b11111a | 840 | newblocknum = udf_new_block(inode->i_sb, inode, |
48d6d8ff | 841 | iinfo->i_location.partitionReferenceNum, |
4b11111a MS |
842 | goal, err); |
843 | if (!newblocknum) { | |
3bf25cb4 | 844 | brelse(prev_epos.bh); |
2fb7d99d NJ |
845 | brelse(cur_epos.bh); |
846 | brelse(next_epos.bh); | |
1da177e4 | 847 | *err = -ENOSPC; |
7b0b0933 | 848 | return 0; |
1da177e4 | 849 | } |
fb719c59 NJ |
850 | if (isBeyondEOF) |
851 | iinfo->i_lenExtents += inode->i_sb->s_blocksize; | |
1da177e4 LT |
852 | } |
853 | ||
4b11111a MS |
854 | /* if the extent the requsted block is located in contains multiple |
855 | * blocks, split the extent into at most three extents. blocks prior | |
856 | * to requested block, requested block, and blocks after requested | |
857 | * block */ | |
1da177e4 LT |
858 | udf_split_extents(inode, &c, offset, newblocknum, laarr, &endnum); |
859 | ||
81056dd0 JK |
860 | /* We preallocate blocks only for regular files. It also makes sense |
861 | * for directories but there's a problem when to drop the | |
862 | * preallocation. We might use some delayed work for that but I feel | |
863 | * it's overengineering for a filesystem like UDF. */ | |
864 | if (S_ISREG(inode->i_mode)) | |
865 | udf_prealloc_extents(inode, c, lastblock, laarr, &endnum); | |
1da177e4 LT |
866 | |
867 | /* merge any continuous blocks in laarr */ | |
868 | udf_merge_extents(inode, laarr, &endnum); | |
869 | ||
870 | /* write back the new extents, inserting new extents if the new number | |
28de7948 CG |
871 | * of extents is greater than the old number, and deleting extents if |
872 | * the new number of extents is less than the old number */ | |
ff116fc8 | 873 | udf_update_extents(inode, laarr, startnum, endnum, &prev_epos); |
1da177e4 | 874 | |
3bf25cb4 | 875 | brelse(prev_epos.bh); |
2fb7d99d NJ |
876 | brelse(cur_epos.bh); |
877 | brelse(next_epos.bh); | |
1da177e4 | 878 | |
4b11111a | 879 | newblock = udf_get_pblock(inode->i_sb, newblocknum, |
48d6d8ff | 880 | iinfo->i_location.partitionReferenceNum, 0); |
7b0b0933 JK |
881 | if (!newblock) { |
882 | *err = -EIO; | |
883 | return 0; | |
884 | } | |
1da177e4 | 885 | *new = 1; |
48d6d8ff MS |
886 | iinfo->i_next_alloc_block = block; |
887 | iinfo->i_next_alloc_goal = newblocknum; | |
c2050a45 | 888 | inode->i_ctime = current_time(inode); |
1da177e4 LT |
889 | |
890 | if (IS_SYNC(inode)) | |
891 | udf_sync_inode(inode); | |
892 | else | |
893 | mark_inode_dirty(inode); | |
28de7948 | 894 | |
7b0b0933 | 895 | return newblock; |
1da177e4 LT |
896 | } |
897 | ||
cb00ea35 CG |
898 | static void udf_split_extents(struct inode *inode, int *c, int offset, |
899 | int newblocknum, | |
5ca4e4be | 900 | struct kernel_long_ad laarr[EXTENT_MERGE_SIZE], |
cb00ea35 | 901 | int *endnum) |
1da177e4 | 902 | { |
4b11111a MS |
903 | unsigned long blocksize = inode->i_sb->s_blocksize; |
904 | unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; | |
905 | ||
1da177e4 | 906 | if ((laarr[*c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30) || |
4b11111a MS |
907 | (laarr[*c].extLength >> 30) == |
908 | (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) { | |
1da177e4 LT |
909 | int curr = *c; |
910 | int blen = ((laarr[curr].extLength & UDF_EXTENT_LENGTH_MASK) + | |
4b11111a | 911 | blocksize - 1) >> blocksize_bits; |
1da177e4 LT |
912 | int8_t etype = (laarr[curr].extLength >> 30); |
913 | ||
4b11111a | 914 | if (blen == 1) |
28de7948 | 915 | ; |
4b11111a | 916 | else if (!offset || blen == offset + 1) { |
cb00ea35 CG |
917 | laarr[curr + 2] = laarr[curr + 1]; |
918 | laarr[curr + 1] = laarr[curr]; | |
919 | } else { | |
920 | laarr[curr + 3] = laarr[curr + 1]; | |
921 | laarr[curr + 2] = laarr[curr + 1] = laarr[curr]; | |
922 | } | |
923 | ||
924 | if (offset) { | |
925 | if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30)) { | |
4b11111a | 926 | udf_free_blocks(inode->i_sb, inode, |
97e961fd | 927 | &laarr[curr].extLocation, |
4b11111a MS |
928 | 0, offset); |
929 | laarr[curr].extLength = | |
930 | EXT_NOT_RECORDED_NOT_ALLOCATED | | |
931 | (offset << blocksize_bits); | |
1da177e4 | 932 | laarr[curr].extLocation.logicalBlockNum = 0; |
4b11111a MS |
933 | laarr[curr].extLocation. |
934 | partitionReferenceNum = 0; | |
935 | } else | |
1da177e4 | 936 | laarr[curr].extLength = (etype << 30) | |
4b11111a | 937 | (offset << blocksize_bits); |
cb00ea35 CG |
938 | curr++; |
939 | (*c)++; | |
940 | (*endnum)++; | |
1da177e4 | 941 | } |
647bd61a | 942 | |
1da177e4 LT |
943 | laarr[curr].extLocation.logicalBlockNum = newblocknum; |
944 | if (etype == (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) | |
945 | laarr[curr].extLocation.partitionReferenceNum = | |
c0b34438 | 946 | UDF_I(inode)->i_location.partitionReferenceNum; |
1da177e4 | 947 | laarr[curr].extLength = EXT_RECORDED_ALLOCATED | |
4b11111a | 948 | blocksize; |
cb00ea35 | 949 | curr++; |
1da177e4 | 950 | |
cb00ea35 | 951 | if (blen != offset + 1) { |
1da177e4 | 952 | if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30)) |
4b11111a MS |
953 | laarr[curr].extLocation.logicalBlockNum += |
954 | offset + 1; | |
28de7948 | 955 | laarr[curr].extLength = (etype << 30) | |
4b11111a | 956 | ((blen - (offset + 1)) << blocksize_bits); |
cb00ea35 CG |
957 | curr++; |
958 | (*endnum)++; | |
1da177e4 LT |
959 | } |
960 | } | |
961 | } | |
962 | ||
963 | static void udf_prealloc_extents(struct inode *inode, int c, int lastblock, | |
5ca4e4be | 964 | struct kernel_long_ad laarr[EXTENT_MERGE_SIZE], |
cb00ea35 | 965 | int *endnum) |
1da177e4 LT |
966 | { |
967 | int start, length = 0, currlength = 0, i; | |
968 | ||
cb00ea35 | 969 | if (*endnum >= (c + 1)) { |
1da177e4 LT |
970 | if (!lastblock) |
971 | return; | |
972 | else | |
973 | start = c; | |
cb00ea35 | 974 | } else { |
4b11111a MS |
975 | if ((laarr[c + 1].extLength >> 30) == |
976 | (EXT_NOT_RECORDED_ALLOCATED >> 30)) { | |
cb00ea35 | 977 | start = c + 1; |
4b11111a MS |
978 | length = currlength = |
979 | (((laarr[c + 1].extLength & | |
980 | UDF_EXTENT_LENGTH_MASK) + | |
981 | inode->i_sb->s_blocksize - 1) >> | |
982 | inode->i_sb->s_blocksize_bits); | |
983 | } else | |
1da177e4 LT |
984 | start = c; |
985 | } | |
986 | ||
cb00ea35 CG |
987 | for (i = start + 1; i <= *endnum; i++) { |
988 | if (i == *endnum) { | |
1da177e4 LT |
989 | if (lastblock) |
990 | length += UDF_DEFAULT_PREALLOC_BLOCKS; | |
4b11111a MS |
991 | } else if ((laarr[i].extLength >> 30) == |
992 | (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) { | |
993 | length += (((laarr[i].extLength & | |
994 | UDF_EXTENT_LENGTH_MASK) + | |
995 | inode->i_sb->s_blocksize - 1) >> | |
996 | inode->i_sb->s_blocksize_bits); | |
997 | } else | |
1da177e4 LT |
998 | break; |
999 | } | |
1000 | ||
cb00ea35 | 1001 | if (length) { |
1da177e4 | 1002 | int next = laarr[start].extLocation.logicalBlockNum + |
28de7948 | 1003 | (((laarr[start].extLength & UDF_EXTENT_LENGTH_MASK) + |
4b11111a MS |
1004 | inode->i_sb->s_blocksize - 1) >> |
1005 | inode->i_sb->s_blocksize_bits); | |
1da177e4 | 1006 | int numalloc = udf_prealloc_blocks(inode->i_sb, inode, |
4b11111a MS |
1007 | laarr[start].extLocation.partitionReferenceNum, |
1008 | next, (UDF_DEFAULT_PREALLOC_BLOCKS > length ? | |
1009 | length : UDF_DEFAULT_PREALLOC_BLOCKS) - | |
1010 | currlength); | |
28de7948 | 1011 | if (numalloc) { |
4b11111a | 1012 | if (start == (c + 1)) |
1da177e4 | 1013 | laarr[start].extLength += |
4b11111a MS |
1014 | (numalloc << |
1015 | inode->i_sb->s_blocksize_bits); | |
1016 | else { | |
cb00ea35 | 1017 | memmove(&laarr[c + 2], &laarr[c + 1], |
5ca4e4be | 1018 | sizeof(struct long_ad) * (*endnum - (c + 1))); |
cb00ea35 CG |
1019 | (*endnum)++; |
1020 | laarr[c + 1].extLocation.logicalBlockNum = next; | |
1021 | laarr[c + 1].extLocation.partitionReferenceNum = | |
4b11111a MS |
1022 | laarr[c].extLocation. |
1023 | partitionReferenceNum; | |
1024 | laarr[c + 1].extLength = | |
1025 | EXT_NOT_RECORDED_ALLOCATED | | |
1026 | (numalloc << | |
1027 | inode->i_sb->s_blocksize_bits); | |
cb00ea35 | 1028 | start = c + 1; |
1da177e4 LT |
1029 | } |
1030 | ||
cb00ea35 | 1031 | for (i = start + 1; numalloc && i < *endnum; i++) { |
4b11111a MS |
1032 | int elen = ((laarr[i].extLength & |
1033 | UDF_EXTENT_LENGTH_MASK) + | |
1034 | inode->i_sb->s_blocksize - 1) >> | |
1035 | inode->i_sb->s_blocksize_bits; | |
1da177e4 | 1036 | |
cb00ea35 | 1037 | if (elen > numalloc) { |
1da177e4 | 1038 | laarr[i].extLength -= |
4b11111a MS |
1039 | (numalloc << |
1040 | inode->i_sb->s_blocksize_bits); | |
1da177e4 | 1041 | numalloc = 0; |
cb00ea35 | 1042 | } else { |
1da177e4 | 1043 | numalloc -= elen; |
cb00ea35 | 1044 | if (*endnum > (i + 1)) |
4b11111a MS |
1045 | memmove(&laarr[i], |
1046 | &laarr[i + 1], | |
5ca4e4be | 1047 | sizeof(struct long_ad) * |
4b11111a | 1048 | (*endnum - (i + 1))); |
cb00ea35 CG |
1049 | i--; |
1050 | (*endnum)--; | |
1da177e4 LT |
1051 | } |
1052 | } | |
c0b34438 | 1053 | UDF_I(inode)->i_lenExtents += |
4b11111a | 1054 | numalloc << inode->i_sb->s_blocksize_bits; |
1da177e4 LT |
1055 | } |
1056 | } | |
1057 | } | |
1058 | ||
1059 | static void udf_merge_extents(struct inode *inode, | |
5ca4e4be | 1060 | struct kernel_long_ad laarr[EXTENT_MERGE_SIZE], |
cb00ea35 | 1061 | int *endnum) |
1da177e4 LT |
1062 | { |
1063 | int i; | |
4b11111a MS |
1064 | unsigned long blocksize = inode->i_sb->s_blocksize; |
1065 | unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; | |
1da177e4 | 1066 | |
cb00ea35 | 1067 | for (i = 0; i < (*endnum - 1); i++) { |
5ca4e4be PE |
1068 | struct kernel_long_ad *li /*l[i]*/ = &laarr[i]; |
1069 | struct kernel_long_ad *lip1 /*l[i plus 1]*/ = &laarr[i + 1]; | |
4b11111a MS |
1070 | |
1071 | if (((li->extLength >> 30) == (lip1->extLength >> 30)) && | |
1072 | (((li->extLength >> 30) == | |
1073 | (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) || | |
1074 | ((lip1->extLocation.logicalBlockNum - | |
1075 | li->extLocation.logicalBlockNum) == | |
1076 | (((li->extLength & UDF_EXTENT_LENGTH_MASK) + | |
1077 | blocksize - 1) >> blocksize_bits)))) { | |
1078 | ||
1079 | if (((li->extLength & UDF_EXTENT_LENGTH_MASK) + | |
1080 | (lip1->extLength & UDF_EXTENT_LENGTH_MASK) + | |
1081 | blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) { | |
1082 | lip1->extLength = (lip1->extLength - | |
1083 | (li->extLength & | |
1084 | UDF_EXTENT_LENGTH_MASK) + | |
1085 | UDF_EXTENT_LENGTH_MASK) & | |
1086 | ~(blocksize - 1); | |
1087 | li->extLength = (li->extLength & | |
1088 | UDF_EXTENT_FLAG_MASK) + | |
1089 | (UDF_EXTENT_LENGTH_MASK + 1) - | |
1090 | blocksize; | |
1091 | lip1->extLocation.logicalBlockNum = | |
1092 | li->extLocation.logicalBlockNum + | |
1093 | ((li->extLength & | |
1094 | UDF_EXTENT_LENGTH_MASK) >> | |
1095 | blocksize_bits); | |
1096 | } else { | |
1097 | li->extLength = lip1->extLength + | |
1098 | (((li->extLength & | |
1099 | UDF_EXTENT_LENGTH_MASK) + | |
1100 | blocksize - 1) & ~(blocksize - 1)); | |
1101 | if (*endnum > (i + 2)) | |
1102 | memmove(&laarr[i + 1], &laarr[i + 2], | |
5ca4e4be | 1103 | sizeof(struct long_ad) * |
4b11111a MS |
1104 | (*endnum - (i + 2))); |
1105 | i--; | |
1106 | (*endnum)--; | |
1da177e4 | 1107 | } |
4b11111a MS |
1108 | } else if (((li->extLength >> 30) == |
1109 | (EXT_NOT_RECORDED_ALLOCATED >> 30)) && | |
1110 | ((lip1->extLength >> 30) == | |
1111 | (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))) { | |
97e961fd | 1112 | udf_free_blocks(inode->i_sb, inode, &li->extLocation, 0, |
4b11111a MS |
1113 | ((li->extLength & |
1114 | UDF_EXTENT_LENGTH_MASK) + | |
1115 | blocksize - 1) >> blocksize_bits); | |
1116 | li->extLocation.logicalBlockNum = 0; | |
1117 | li->extLocation.partitionReferenceNum = 0; | |
1118 | ||
1119 | if (((li->extLength & UDF_EXTENT_LENGTH_MASK) + | |
1120 | (lip1->extLength & UDF_EXTENT_LENGTH_MASK) + | |
1121 | blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) { | |
1122 | lip1->extLength = (lip1->extLength - | |
1123 | (li->extLength & | |
1124 | UDF_EXTENT_LENGTH_MASK) + | |
1125 | UDF_EXTENT_LENGTH_MASK) & | |
1126 | ~(blocksize - 1); | |
1127 | li->extLength = (li->extLength & | |
1128 | UDF_EXTENT_FLAG_MASK) + | |
1129 | (UDF_EXTENT_LENGTH_MASK + 1) - | |
1130 | blocksize; | |
cb00ea35 | 1131 | } else { |
4b11111a MS |
1132 | li->extLength = lip1->extLength + |
1133 | (((li->extLength & | |
1134 | UDF_EXTENT_LENGTH_MASK) + | |
1135 | blocksize - 1) & ~(blocksize - 1)); | |
cb00ea35 CG |
1136 | if (*endnum > (i + 2)) |
1137 | memmove(&laarr[i + 1], &laarr[i + 2], | |
5ca4e4be | 1138 | sizeof(struct long_ad) * |
4b11111a | 1139 | (*endnum - (i + 2))); |
cb00ea35 CG |
1140 | i--; |
1141 | (*endnum)--; | |
1da177e4 | 1142 | } |
4b11111a MS |
1143 | } else if ((li->extLength >> 30) == |
1144 | (EXT_NOT_RECORDED_ALLOCATED >> 30)) { | |
1145 | udf_free_blocks(inode->i_sb, inode, | |
97e961fd | 1146 | &li->extLocation, 0, |
4b11111a MS |
1147 | ((li->extLength & |
1148 | UDF_EXTENT_LENGTH_MASK) + | |
1149 | blocksize - 1) >> blocksize_bits); | |
1150 | li->extLocation.logicalBlockNum = 0; | |
1151 | li->extLocation.partitionReferenceNum = 0; | |
1152 | li->extLength = (li->extLength & | |
1153 | UDF_EXTENT_LENGTH_MASK) | | |
1154 | EXT_NOT_RECORDED_NOT_ALLOCATED; | |
1da177e4 LT |
1155 | } |
1156 | } | |
1157 | } | |
1158 | ||
1159 | static void udf_update_extents(struct inode *inode, | |
5ca4e4be | 1160 | struct kernel_long_ad laarr[EXTENT_MERGE_SIZE], |
cb00ea35 CG |
1161 | int startnum, int endnum, |
1162 | struct extent_position *epos) | |
1da177e4 LT |
1163 | { |
1164 | int start = 0, i; | |
5ca4e4be | 1165 | struct kernel_lb_addr tmploc; |
1da177e4 LT |
1166 | uint32_t tmplen; |
1167 | ||
cb00ea35 CG |
1168 | if (startnum > endnum) { |
1169 | for (i = 0; i < (startnum - endnum); i++) | |
ff116fc8 | 1170 | udf_delete_aext(inode, *epos, laarr[i].extLocation, |
cb00ea35 CG |
1171 | laarr[i].extLength); |
1172 | } else if (startnum < endnum) { | |
1173 | for (i = 0; i < (endnum - startnum); i++) { | |
ff116fc8 | 1174 | udf_insert_aext(inode, *epos, laarr[i].extLocation, |
cb00ea35 | 1175 | laarr[i].extLength); |
ff116fc8 | 1176 | udf_next_aext(inode, epos, &laarr[i].extLocation, |
cb00ea35 CG |
1177 | &laarr[i].extLength, 1); |
1178 | start++; | |
1da177e4 LT |
1179 | } |
1180 | } | |
1181 | ||
cb00ea35 | 1182 | for (i = start; i < endnum; i++) { |
ff116fc8 | 1183 | udf_next_aext(inode, epos, &tmploc, &tmplen, 0); |
97e961fd | 1184 | udf_write_aext(inode, epos, &laarr[i].extLocation, |
cb00ea35 | 1185 | laarr[i].extLength, 1); |
1da177e4 LT |
1186 | } |
1187 | } | |
1188 | ||
cb00ea35 CG |
1189 | struct buffer_head *udf_bread(struct inode *inode, int block, |
1190 | int create, int *err) | |
1da177e4 | 1191 | { |
cb00ea35 | 1192 | struct buffer_head *bh = NULL; |
1da177e4 LT |
1193 | |
1194 | bh = udf_getblk(inode, block, create, err); | |
1195 | if (!bh) | |
1196 | return NULL; | |
1197 | ||
1198 | if (buffer_uptodate(bh)) | |
1199 | return bh; | |
28de7948 | 1200 | |
dfec8a14 | 1201 | ll_rw_block(REQ_OP_READ, 0, 1, &bh); |
28de7948 | 1202 | |
1da177e4 LT |
1203 | wait_on_buffer(bh); |
1204 | if (buffer_uptodate(bh)) | |
1205 | return bh; | |
28de7948 | 1206 | |
1da177e4 LT |
1207 | brelse(bh); |
1208 | *err = -EIO; | |
1209 | return NULL; | |
1210 | } | |
1211 | ||
7e49b6f2 | 1212 | int udf_setsize(struct inode *inode, loff_t newsize) |
1da177e4 | 1213 | { |
1da177e4 | 1214 | int err; |
48d6d8ff | 1215 | struct udf_inode_info *iinfo; |
7e49b6f2 | 1216 | int bsize = 1 << inode->i_blkbits; |
1da177e4 LT |
1217 | |
1218 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || | |
cb00ea35 | 1219 | S_ISLNK(inode->i_mode))) |
7e49b6f2 | 1220 | return -EINVAL; |
1da177e4 | 1221 | if (IS_APPEND(inode) || IS_IMMUTABLE(inode)) |
7e49b6f2 | 1222 | return -EPERM; |
1da177e4 | 1223 | |
48d6d8ff | 1224 | iinfo = UDF_I(inode); |
7e49b6f2 | 1225 | if (newsize > inode->i_size) { |
4d0fb621 | 1226 | down_write(&iinfo->i_data_sem); |
7e49b6f2 JK |
1227 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { |
1228 | if (bsize < | |
1229 | (udf_file_entry_alloc_offset(inode) + newsize)) { | |
1230 | err = udf_expand_file_adinicb(inode); | |
d2eb8c35 | 1231 | if (err) |
7e49b6f2 | 1232 | return err; |
d2eb8c35 | 1233 | down_write(&iinfo->i_data_sem); |
bb2b6d19 | 1234 | } else { |
7e49b6f2 | 1235 | iinfo->i_lenAlloc = newsize; |
bb2b6d19 IA |
1236 | goto set_size; |
1237 | } | |
7e49b6f2 JK |
1238 | } |
1239 | err = udf_extend_file(inode, newsize); | |
1240 | if (err) { | |
1241 | up_write(&iinfo->i_data_sem); | |
1242 | return err; | |
1da177e4 | 1243 | } |
bb2b6d19 | 1244 | set_size: |
7e49b6f2 | 1245 | truncate_setsize(inode, newsize); |
4d0fb621 | 1246 | up_write(&iinfo->i_data_sem); |
cb00ea35 | 1247 | } else { |
7e49b6f2 JK |
1248 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { |
1249 | down_write(&iinfo->i_data_sem); | |
99600051 | 1250 | udf_clear_extent_cache(inode); |
7e49b6f2 JK |
1251 | memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr + newsize, |
1252 | 0x00, bsize - newsize - | |
1253 | udf_file_entry_alloc_offset(inode)); | |
1254 | iinfo->i_lenAlloc = newsize; | |
1255 | truncate_setsize(inode, newsize); | |
1256 | up_write(&iinfo->i_data_sem); | |
1257 | goto update_time; | |
1258 | } | |
1259 | err = block_truncate_page(inode->i_mapping, newsize, | |
1260 | udf_get_block); | |
1261 | if (err) | |
1262 | return err; | |
4d0fb621 | 1263 | down_write(&iinfo->i_data_sem); |
99600051 | 1264 | udf_clear_extent_cache(inode); |
7e49b6f2 | 1265 | truncate_setsize(inode, newsize); |
1da177e4 | 1266 | udf_truncate_extents(inode); |
4d0fb621 | 1267 | up_write(&iinfo->i_data_sem); |
647bd61a | 1268 | } |
7e49b6f2 | 1269 | update_time: |
c2050a45 | 1270 | inode->i_mtime = inode->i_ctime = current_time(inode); |
1da177e4 | 1271 | if (IS_SYNC(inode)) |
cb00ea35 | 1272 | udf_sync_inode(inode); |
1da177e4 LT |
1273 | else |
1274 | mark_inode_dirty(inode); | |
7e49b6f2 | 1275 | return 0; |
1da177e4 LT |
1276 | } |
1277 | ||
c03aa9f6 JK |
1278 | /* |
1279 | * Maximum length of linked list formed by ICB hierarchy. The chosen number is | |
1280 | * arbitrary - just that we hopefully don't limit any real use of rewritten | |
1281 | * inode on write-once media but avoid looping for too long on corrupted media. | |
1282 | */ | |
1283 | #define UDF_MAX_ICB_NESTING 1024 | |
1284 | ||
6174c2eb | 1285 | static int udf_read_inode(struct inode *inode, bool hidden_inode) |
1da177e4 LT |
1286 | { |
1287 | struct buffer_head *bh = NULL; | |
1288 | struct fileEntry *fe; | |
bb7720a0 | 1289 | struct extendedFileEntry *efe; |
1da177e4 | 1290 | uint16_t ident; |
48d6d8ff | 1291 | struct udf_inode_info *iinfo = UDF_I(inode); |
bb7720a0 | 1292 | struct udf_sb_info *sbi = UDF_SB(inode->i_sb); |
6d3d5e86 | 1293 | struct kernel_lb_addr *iloc = &iinfo->i_location; |
bb7720a0 | 1294 | unsigned int link_count; |
c03aa9f6 | 1295 | unsigned int indirections = 0; |
79144954 | 1296 | int bs = inode->i_sb->s_blocksize; |
6d3d5e86 | 1297 | int ret = -EIO; |
1da177e4 | 1298 | |
c03aa9f6 | 1299 | reread: |
6d3d5e86 JK |
1300 | if (iloc->logicalBlockNum >= |
1301 | sbi->s_partmaps[iloc->partitionReferenceNum].s_partition_len) { | |
1302 | udf_debug("block=%d, partition=%d out of range\n", | |
1303 | iloc->logicalBlockNum, iloc->partitionReferenceNum); | |
1304 | return -EIO; | |
1305 | } | |
1306 | ||
1da177e4 LT |
1307 | /* |
1308 | * Set defaults, but the inode is still incomplete! | |
1309 | * Note: get_new_inode() sets the following on a new inode: | |
1310 | * i_sb = sb | |
1311 | * i_no = ino | |
1312 | * i_flags = sb->s_flags | |
1313 | * i_state = 0 | |
1314 | * clean_inode(): zero fills and sets | |
1315 | * i_count = 1 | |
1316 | * i_nlink = 1 | |
1317 | * i_op = NULL; | |
1318 | */ | |
6d3d5e86 | 1319 | bh = udf_read_ptagged(inode->i_sb, iloc, 0, &ident); |
cb00ea35 | 1320 | if (!bh) { |
78ace70c | 1321 | udf_err(inode->i_sb, "(ino %ld) failed !bh\n", inode->i_ino); |
6d3d5e86 | 1322 | return -EIO; |
1da177e4 LT |
1323 | } |
1324 | ||
1325 | if (ident != TAG_IDENT_FE && ident != TAG_IDENT_EFE && | |
cb00ea35 | 1326 | ident != TAG_IDENT_USE) { |
78ace70c JP |
1327 | udf_err(inode->i_sb, "(ino %ld) failed ident=%d\n", |
1328 | inode->i_ino, ident); | |
6d3d5e86 | 1329 | goto out; |
1da177e4 LT |
1330 | } |
1331 | ||
1332 | fe = (struct fileEntry *)bh->b_data; | |
bb7720a0 | 1333 | efe = (struct extendedFileEntry *)bh->b_data; |
1da177e4 | 1334 | |
5e0f0017 | 1335 | if (fe->icbTag.strategyType == cpu_to_le16(4096)) { |
1ab92785 | 1336 | struct buffer_head *ibh; |
1da177e4 | 1337 | |
6d3d5e86 | 1338 | ibh = udf_read_ptagged(inode->i_sb, iloc, 1, &ident); |
1ab92785 | 1339 | if (ident == TAG_IDENT_IE && ibh) { |
5ca4e4be | 1340 | struct kernel_lb_addr loc; |
1ab92785 | 1341 | struct indirectEntry *ie; |
1342 | ||
1343 | ie = (struct indirectEntry *)ibh->b_data; | |
1344 | loc = lelb_to_cpu(ie->indirectICB.extLocation); | |
1345 | ||
c03aa9f6 | 1346 | if (ie->indirectICB.extLength) { |
c03aa9f6 JK |
1347 | brelse(ibh); |
1348 | memcpy(&iinfo->i_location, &loc, | |
1349 | sizeof(struct kernel_lb_addr)); | |
1350 | if (++indirections > UDF_MAX_ICB_NESTING) { | |
1351 | udf_err(inode->i_sb, | |
1352 | "too many ICBs in ICB hierarchy" | |
1353 | " (max %d supported)\n", | |
1354 | UDF_MAX_ICB_NESTING); | |
6d3d5e86 | 1355 | goto out; |
28de7948 | 1356 | } |
6d3d5e86 | 1357 | brelse(bh); |
c03aa9f6 | 1358 | goto reread; |
1da177e4 | 1359 | } |
28de7948 | 1360 | } |
1ab92785 | 1361 | brelse(ibh); |
5e0f0017 | 1362 | } else if (fe->icbTag.strategyType != cpu_to_le16(4)) { |
78ace70c JP |
1363 | udf_err(inode->i_sb, "unsupported strategy type: %d\n", |
1364 | le16_to_cpu(fe->icbTag.strategyType)); | |
6d3d5e86 | 1365 | goto out; |
1da177e4 | 1366 | } |
5e0f0017 | 1367 | if (fe->icbTag.strategyType == cpu_to_le16(4)) |
48d6d8ff | 1368 | iinfo->i_strat4096 = 0; |
5e0f0017 | 1369 | else /* if (fe->icbTag.strategyType == cpu_to_le16(4096)) */ |
48d6d8ff | 1370 | iinfo->i_strat4096 = 1; |
1da177e4 | 1371 | |
48d6d8ff | 1372 | iinfo->i_alloc_type = le16_to_cpu(fe->icbTag.flags) & |
4b11111a | 1373 | ICBTAG_FLAG_AD_MASK; |
48d6d8ff MS |
1374 | iinfo->i_unique = 0; |
1375 | iinfo->i_lenEAttr = 0; | |
1376 | iinfo->i_lenExtents = 0; | |
1377 | iinfo->i_lenAlloc = 0; | |
1378 | iinfo->i_next_alloc_block = 0; | |
1379 | iinfo->i_next_alloc_goal = 0; | |
5e0f0017 | 1380 | if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_EFE)) { |
48d6d8ff MS |
1381 | iinfo->i_efe = 1; |
1382 | iinfo->i_use = 0; | |
79144954 | 1383 | ret = udf_alloc_i_data(inode, bs - |
6d3d5e86 JK |
1384 | sizeof(struct extendedFileEntry)); |
1385 | if (ret) | |
1386 | goto out; | |
48d6d8ff | 1387 | memcpy(iinfo->i_ext.i_data, |
4b11111a | 1388 | bh->b_data + sizeof(struct extendedFileEntry), |
79144954 | 1389 | bs - sizeof(struct extendedFileEntry)); |
5e0f0017 | 1390 | } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_FE)) { |
48d6d8ff MS |
1391 | iinfo->i_efe = 0; |
1392 | iinfo->i_use = 0; | |
79144954 | 1393 | ret = udf_alloc_i_data(inode, bs - sizeof(struct fileEntry)); |
6d3d5e86 JK |
1394 | if (ret) |
1395 | goto out; | |
48d6d8ff | 1396 | memcpy(iinfo->i_ext.i_data, |
c0b34438 | 1397 | bh->b_data + sizeof(struct fileEntry), |
79144954 | 1398 | bs - sizeof(struct fileEntry)); |
5e0f0017 | 1399 | } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_USE)) { |
48d6d8ff MS |
1400 | iinfo->i_efe = 0; |
1401 | iinfo->i_use = 1; | |
1402 | iinfo->i_lenAlloc = le32_to_cpu( | |
4b11111a MS |
1403 | ((struct unallocSpaceEntry *)bh->b_data)-> |
1404 | lengthAllocDescs); | |
79144954 | 1405 | ret = udf_alloc_i_data(inode, bs - |
6d3d5e86 JK |
1406 | sizeof(struct unallocSpaceEntry)); |
1407 | if (ret) | |
1408 | goto out; | |
48d6d8ff | 1409 | memcpy(iinfo->i_ext.i_data, |
4b11111a | 1410 | bh->b_data + sizeof(struct unallocSpaceEntry), |
79144954 | 1411 | bs - sizeof(struct unallocSpaceEntry)); |
6d3d5e86 | 1412 | return 0; |
1da177e4 LT |
1413 | } |
1414 | ||
6d3d5e86 | 1415 | ret = -EIO; |
c03cad24 | 1416 | read_lock(&sbi->s_cred_lock); |
c2ba138a EB |
1417 | i_uid_write(inode, le32_to_cpu(fe->uid)); |
1418 | if (!uid_valid(inode->i_uid) || | |
ca76d2d8 CG |
1419 | UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_IGNORE) || |
1420 | UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_SET)) | |
4d6660eb | 1421 | inode->i_uid = UDF_SB(inode->i_sb)->s_uid; |
1da177e4 | 1422 | |
c2ba138a EB |
1423 | i_gid_write(inode, le32_to_cpu(fe->gid)); |
1424 | if (!gid_valid(inode->i_gid) || | |
ca76d2d8 CG |
1425 | UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_IGNORE) || |
1426 | UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_SET)) | |
4d6660eb | 1427 | inode->i_gid = UDF_SB(inode->i_sb)->s_gid; |
1da177e4 | 1428 | |
7ac9bcd5 | 1429 | if (fe->icbTag.fileType != ICBTAG_FILE_TYPE_DIRECTORY && |
87bc730c | 1430 | sbi->s_fmode != UDF_INVALID_MODE) |
7ac9bcd5 MS |
1431 | inode->i_mode = sbi->s_fmode; |
1432 | else if (fe->icbTag.fileType == ICBTAG_FILE_TYPE_DIRECTORY && | |
87bc730c | 1433 | sbi->s_dmode != UDF_INVALID_MODE) |
7ac9bcd5 MS |
1434 | inode->i_mode = sbi->s_dmode; |
1435 | else | |
1436 | inode->i_mode = udf_convert_permissions(fe); | |
1437 | inode->i_mode &= ~sbi->s_umask; | |
c03cad24 JK |
1438 | read_unlock(&sbi->s_cred_lock); |
1439 | ||
bfe86848 | 1440 | link_count = le16_to_cpu(fe->fileLinkCount); |
4071b913 | 1441 | if (!link_count) { |
6174c2eb JK |
1442 | if (!hidden_inode) { |
1443 | ret = -ESTALE; | |
1444 | goto out; | |
1445 | } | |
1446 | link_count = 1; | |
4071b913 | 1447 | } |
bfe86848 | 1448 | set_nlink(inode, link_count); |
c03cad24 JK |
1449 | |
1450 | inode->i_size = le64_to_cpu(fe->informationLength); | |
1451 | iinfo->i_lenExtents = inode->i_size; | |
1da177e4 | 1452 | |
48d6d8ff | 1453 | if (iinfo->i_efe == 0) { |
1da177e4 | 1454 | inode->i_blocks = le64_to_cpu(fe->logicalBlocksRecorded) << |
28de7948 | 1455 | (inode->i_sb->s_blocksize_bits - 9); |
1da177e4 | 1456 | |
56774805 | 1457 | if (!udf_disk_stamp_to_time(&inode->i_atime, fe->accessTime)) |
cbf5676a | 1458 | inode->i_atime = sbi->s_record_time; |
1459 | ||
56774805 MS |
1460 | if (!udf_disk_stamp_to_time(&inode->i_mtime, |
1461 | fe->modificationTime)) | |
cbf5676a | 1462 | inode->i_mtime = sbi->s_record_time; |
1463 | ||
56774805 | 1464 | if (!udf_disk_stamp_to_time(&inode->i_ctime, fe->attrTime)) |
cbf5676a | 1465 | inode->i_ctime = sbi->s_record_time; |
1da177e4 | 1466 | |
48d6d8ff MS |
1467 | iinfo->i_unique = le64_to_cpu(fe->uniqueID); |
1468 | iinfo->i_lenEAttr = le32_to_cpu(fe->lengthExtendedAttr); | |
1469 | iinfo->i_lenAlloc = le32_to_cpu(fe->lengthAllocDescs); | |
d5e2cf07 | 1470 | iinfo->i_checkpoint = le32_to_cpu(fe->checkpoint); |
cb00ea35 | 1471 | } else { |
647bd61a | 1472 | inode->i_blocks = le64_to_cpu(efe->logicalBlocksRecorded) << |
cb00ea35 | 1473 | (inode->i_sb->s_blocksize_bits - 9); |
1da177e4 | 1474 | |
56774805 | 1475 | if (!udf_disk_stamp_to_time(&inode->i_atime, efe->accessTime)) |
cbf5676a | 1476 | inode->i_atime = sbi->s_record_time; |
1477 | ||
56774805 MS |
1478 | if (!udf_disk_stamp_to_time(&inode->i_mtime, |
1479 | efe->modificationTime)) | |
cbf5676a | 1480 | inode->i_mtime = sbi->s_record_time; |
1481 | ||
56774805 | 1482 | if (!udf_disk_stamp_to_time(&iinfo->i_crtime, efe->createTime)) |
cbf5676a | 1483 | iinfo->i_crtime = sbi->s_record_time; |
1484 | ||
56774805 | 1485 | if (!udf_disk_stamp_to_time(&inode->i_ctime, efe->attrTime)) |
cbf5676a | 1486 | inode->i_ctime = sbi->s_record_time; |
1da177e4 | 1487 | |
48d6d8ff MS |
1488 | iinfo->i_unique = le64_to_cpu(efe->uniqueID); |
1489 | iinfo->i_lenEAttr = le32_to_cpu(efe->lengthExtendedAttr); | |
1490 | iinfo->i_lenAlloc = le32_to_cpu(efe->lengthAllocDescs); | |
d5e2cf07 | 1491 | iinfo->i_checkpoint = le32_to_cpu(efe->checkpoint); |
1da177e4 | 1492 | } |
470cca56 | 1493 | inode->i_generation = iinfo->i_unique; |
1da177e4 | 1494 | |
23b133bd JK |
1495 | /* |
1496 | * Sanity check length of allocation descriptors and extended attrs to | |
1497 | * avoid integer overflows | |
1498 | */ | |
1499 | if (iinfo->i_lenEAttr > bs || iinfo->i_lenAlloc > bs) | |
1500 | goto out; | |
1501 | /* Now do exact checks */ | |
1502 | if (udf_file_entry_alloc_offset(inode) + iinfo->i_lenAlloc > bs) | |
1503 | goto out; | |
e159332b JK |
1504 | /* Sanity checks for files in ICB so that we don't get confused later */ |
1505 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { | |
1506 | /* | |
1507 | * For file in ICB data is stored in allocation descriptor | |
1508 | * so sizes should match | |
1509 | */ | |
1510 | if (iinfo->i_lenAlloc != inode->i_size) | |
1511 | goto out; | |
1512 | /* File in ICB has to fit in there... */ | |
79144954 | 1513 | if (inode->i_size > bs - udf_file_entry_alloc_offset(inode)) |
e159332b JK |
1514 | goto out; |
1515 | } | |
1516 | ||
cb00ea35 CG |
1517 | switch (fe->icbTag.fileType) { |
1518 | case ICBTAG_FILE_TYPE_DIRECTORY: | |
28de7948 CG |
1519 | inode->i_op = &udf_dir_inode_operations; |
1520 | inode->i_fop = &udf_dir_operations; | |
1521 | inode->i_mode |= S_IFDIR; | |
1522 | inc_nlink(inode); | |
1523 | break; | |
cb00ea35 CG |
1524 | case ICBTAG_FILE_TYPE_REALTIME: |
1525 | case ICBTAG_FILE_TYPE_REGULAR: | |
1526 | case ICBTAG_FILE_TYPE_UNDEF: | |
742e1795 | 1527 | case ICBTAG_FILE_TYPE_VAT20: |
48d6d8ff | 1528 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
28de7948 CG |
1529 | inode->i_data.a_ops = &udf_adinicb_aops; |
1530 | else | |
1531 | inode->i_data.a_ops = &udf_aops; | |
1532 | inode->i_op = &udf_file_inode_operations; | |
1533 | inode->i_fop = &udf_file_operations; | |
1534 | inode->i_mode |= S_IFREG; | |
1535 | break; | |
cb00ea35 | 1536 | case ICBTAG_FILE_TYPE_BLOCK: |
28de7948 CG |
1537 | inode->i_mode |= S_IFBLK; |
1538 | break; | |
cb00ea35 | 1539 | case ICBTAG_FILE_TYPE_CHAR: |
28de7948 CG |
1540 | inode->i_mode |= S_IFCHR; |
1541 | break; | |
cb00ea35 | 1542 | case ICBTAG_FILE_TYPE_FIFO: |
28de7948 CG |
1543 | init_special_inode(inode, inode->i_mode | S_IFIFO, 0); |
1544 | break; | |
cb00ea35 | 1545 | case ICBTAG_FILE_TYPE_SOCKET: |
28de7948 CG |
1546 | init_special_inode(inode, inode->i_mode | S_IFSOCK, 0); |
1547 | break; | |
cb00ea35 | 1548 | case ICBTAG_FILE_TYPE_SYMLINK: |
28de7948 | 1549 | inode->i_data.a_ops = &udf_symlink_aops; |
c73119c5 | 1550 | inode->i_op = &page_symlink_inode_operations; |
21fc61c7 | 1551 | inode_nohighmem(inode); |
28de7948 CG |
1552 | inode->i_mode = S_IFLNK | S_IRWXUGO; |
1553 | break; | |
bfb257a5 JK |
1554 | case ICBTAG_FILE_TYPE_MAIN: |
1555 | udf_debug("METADATA FILE-----\n"); | |
1556 | break; | |
1557 | case ICBTAG_FILE_TYPE_MIRROR: | |
1558 | udf_debug("METADATA MIRROR FILE-----\n"); | |
1559 | break; | |
1560 | case ICBTAG_FILE_TYPE_BITMAP: | |
1561 | udf_debug("METADATA BITMAP FILE-----\n"); | |
1562 | break; | |
cb00ea35 | 1563 | default: |
78ace70c JP |
1564 | udf_err(inode->i_sb, "(ino %ld) failed unknown file type=%d\n", |
1565 | inode->i_ino, fe->icbTag.fileType); | |
6d3d5e86 | 1566 | goto out; |
1da177e4 | 1567 | } |
cb00ea35 | 1568 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { |
4b11111a MS |
1569 | struct deviceSpec *dsea = |
1570 | (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1); | |
cb00ea35 CG |
1571 | if (dsea) { |
1572 | init_special_inode(inode, inode->i_mode, | |
4b11111a MS |
1573 | MKDEV(le32_to_cpu(dsea->majorDeviceIdent), |
1574 | le32_to_cpu(dsea->minorDeviceIdent))); | |
1da177e4 | 1575 | /* Developer ID ??? */ |
4b11111a | 1576 | } else |
6d3d5e86 | 1577 | goto out; |
1da177e4 | 1578 | } |
6d3d5e86 JK |
1579 | ret = 0; |
1580 | out: | |
bb7720a0 | 1581 | brelse(bh); |
6d3d5e86 | 1582 | return ret; |
1da177e4 LT |
1583 | } |
1584 | ||
647bd61a CG |
1585 | static int udf_alloc_i_data(struct inode *inode, size_t size) |
1586 | { | |
48d6d8ff MS |
1587 | struct udf_inode_info *iinfo = UDF_I(inode); |
1588 | iinfo->i_ext.i_data = kmalloc(size, GFP_KERNEL); | |
647bd61a | 1589 | |
48d6d8ff | 1590 | if (!iinfo->i_ext.i_data) { |
78ace70c JP |
1591 | udf_err(inode->i_sb, "(ino %ld) no free memory\n", |
1592 | inode->i_ino); | |
647bd61a CG |
1593 | return -ENOMEM; |
1594 | } | |
1595 | ||
1596 | return 0; | |
1597 | } | |
1598 | ||
faa17292 | 1599 | static umode_t udf_convert_permissions(struct fileEntry *fe) |
1da177e4 | 1600 | { |
faa17292 | 1601 | umode_t mode; |
1da177e4 LT |
1602 | uint32_t permissions; |
1603 | uint32_t flags; | |
1604 | ||
1605 | permissions = le32_to_cpu(fe->permissions); | |
1606 | flags = le16_to_cpu(fe->icbTag.flags); | |
1607 | ||
4b11111a MS |
1608 | mode = ((permissions) & S_IRWXO) | |
1609 | ((permissions >> 2) & S_IRWXG) | | |
1610 | ((permissions >> 4) & S_IRWXU) | | |
1611 | ((flags & ICBTAG_FLAG_SETUID) ? S_ISUID : 0) | | |
1612 | ((flags & ICBTAG_FLAG_SETGID) ? S_ISGID : 0) | | |
1613 | ((flags & ICBTAG_FLAG_STICKY) ? S_ISVTX : 0); | |
1da177e4 LT |
1614 | |
1615 | return mode; | |
1616 | } | |
1617 | ||
a9185b41 | 1618 | int udf_write_inode(struct inode *inode, struct writeback_control *wbc) |
1da177e4 | 1619 | { |
49521de1 | 1620 | return udf_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL); |
1da177e4 LT |
1621 | } |
1622 | ||
49521de1 | 1623 | static int udf_sync_inode(struct inode *inode) |
1da177e4 LT |
1624 | { |
1625 | return udf_update_inode(inode, 1); | |
1626 | } | |
1627 | ||
cb00ea35 | 1628 | static int udf_update_inode(struct inode *inode, int do_sync) |
1da177e4 LT |
1629 | { |
1630 | struct buffer_head *bh = NULL; | |
1631 | struct fileEntry *fe; | |
1632 | struct extendedFileEntry *efe; | |
b2527bfa | 1633 | uint64_t lb_recorded; |
1da177e4 LT |
1634 | uint32_t udfperms; |
1635 | uint16_t icbflags; | |
1636 | uint16_t crclen; | |
1da177e4 | 1637 | int err = 0; |
6c79e987 | 1638 | struct udf_sb_info *sbi = UDF_SB(inode->i_sb); |
4b11111a | 1639 | unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; |
48d6d8ff | 1640 | struct udf_inode_info *iinfo = UDF_I(inode); |
1da177e4 | 1641 | |
5833ded9 JK |
1642 | bh = udf_tgetblk(inode->i_sb, |
1643 | udf_get_lb_pblock(inode->i_sb, &iinfo->i_location, 0)); | |
cb00ea35 | 1644 | if (!bh) { |
aae917cd | 1645 | udf_debug("getblk failure\n"); |
0fd2ba36 | 1646 | return -EIO; |
1da177e4 LT |
1647 | } |
1648 | ||
aae917cd JK |
1649 | lock_buffer(bh); |
1650 | memset(bh->b_data, 0, inode->i_sb->s_blocksize); | |
1da177e4 LT |
1651 | fe = (struct fileEntry *)bh->b_data; |
1652 | efe = (struct extendedFileEntry *)bh->b_data; | |
1653 | ||
aae917cd | 1654 | if (iinfo->i_use) { |
1da177e4 | 1655 | struct unallocSpaceEntry *use = |
28de7948 | 1656 | (struct unallocSpaceEntry *)bh->b_data; |
1da177e4 | 1657 | |
48d6d8ff | 1658 | use->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc); |
4b11111a | 1659 | memcpy(bh->b_data + sizeof(struct unallocSpaceEntry), |
48d6d8ff | 1660 | iinfo->i_ext.i_data, inode->i_sb->s_blocksize - |
4b11111a | 1661 | sizeof(struct unallocSpaceEntry)); |
aae917cd | 1662 | use->descTag.tagIdent = cpu_to_le16(TAG_IDENT_USE); |
70f19f58 | 1663 | crclen = sizeof(struct unallocSpaceEntry); |
1da177e4 | 1664 | |
70f19f58 | 1665 | goto finish; |
1da177e4 LT |
1666 | } |
1667 | ||
4d6660eb PS |
1668 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_FORGET)) |
1669 | fe->uid = cpu_to_le32(-1); | |
cb00ea35 | 1670 | else |
c2ba138a | 1671 | fe->uid = cpu_to_le32(i_uid_read(inode)); |
1da177e4 | 1672 | |
4d6660eb PS |
1673 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_FORGET)) |
1674 | fe->gid = cpu_to_le32(-1); | |
cb00ea35 | 1675 | else |
c2ba138a | 1676 | fe->gid = cpu_to_le32(i_gid_read(inode)); |
1da177e4 | 1677 | |
4b11111a MS |
1678 | udfperms = ((inode->i_mode & S_IRWXO)) | |
1679 | ((inode->i_mode & S_IRWXG) << 2) | | |
1680 | ((inode->i_mode & S_IRWXU) << 4); | |
1da177e4 | 1681 | |
4b11111a MS |
1682 | udfperms |= (le32_to_cpu(fe->permissions) & |
1683 | (FE_PERM_O_DELETE | FE_PERM_O_CHATTR | | |
1684 | FE_PERM_G_DELETE | FE_PERM_G_CHATTR | | |
1685 | FE_PERM_U_DELETE | FE_PERM_U_CHATTR)); | |
1da177e4 LT |
1686 | fe->permissions = cpu_to_le32(udfperms); |
1687 | ||
8a70ee33 | 1688 | if (S_ISDIR(inode->i_mode) && inode->i_nlink > 0) |
1da177e4 LT |
1689 | fe->fileLinkCount = cpu_to_le16(inode->i_nlink - 1); |
1690 | else | |
1691 | fe->fileLinkCount = cpu_to_le16(inode->i_nlink); | |
1692 | ||
1693 | fe->informationLength = cpu_to_le64(inode->i_size); | |
1694 | ||
cb00ea35 | 1695 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { |
5ca4e4be | 1696 | struct regid *eid; |
28de7948 CG |
1697 | struct deviceSpec *dsea = |
1698 | (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1); | |
cb00ea35 | 1699 | if (!dsea) { |
1da177e4 | 1700 | dsea = (struct deviceSpec *) |
28de7948 CG |
1701 | udf_add_extendedattr(inode, |
1702 | sizeof(struct deviceSpec) + | |
5ca4e4be | 1703 | sizeof(struct regid), 12, 0x3); |
1da177e4 LT |
1704 | dsea->attrType = cpu_to_le32(12); |
1705 | dsea->attrSubtype = 1; | |
4b11111a MS |
1706 | dsea->attrLength = cpu_to_le32( |
1707 | sizeof(struct deviceSpec) + | |
5ca4e4be PE |
1708 | sizeof(struct regid)); |
1709 | dsea->impUseLength = cpu_to_le32(sizeof(struct regid)); | |
1da177e4 | 1710 | } |
5ca4e4be PE |
1711 | eid = (struct regid *)dsea->impUse; |
1712 | memset(eid, 0, sizeof(struct regid)); | |
1da177e4 LT |
1713 | strcpy(eid->ident, UDF_ID_DEVELOPER); |
1714 | eid->identSuffix[0] = UDF_OS_CLASS_UNIX; | |
1715 | eid->identSuffix[1] = UDF_OS_ID_LINUX; | |
1716 | dsea->majorDeviceIdent = cpu_to_le32(imajor(inode)); | |
1717 | dsea->minorDeviceIdent = cpu_to_le32(iminor(inode)); | |
1718 | } | |
1719 | ||
b2527bfa SN |
1720 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1721 | lb_recorded = 0; /* No extents => no blocks! */ | |
1722 | else | |
1723 | lb_recorded = | |
1724 | (inode->i_blocks + (1 << (blocksize_bits - 9)) - 1) >> | |
1725 | (blocksize_bits - 9); | |
1726 | ||
48d6d8ff | 1727 | if (iinfo->i_efe == 0) { |
c0b34438 | 1728 | memcpy(bh->b_data + sizeof(struct fileEntry), |
48d6d8ff | 1729 | iinfo->i_ext.i_data, |
cb00ea35 | 1730 | inode->i_sb->s_blocksize - sizeof(struct fileEntry)); |
b2527bfa | 1731 | fe->logicalBlocksRecorded = cpu_to_le64(lb_recorded); |
1da177e4 | 1732 | |
56774805 MS |
1733 | udf_time_to_disk_stamp(&fe->accessTime, inode->i_atime); |
1734 | udf_time_to_disk_stamp(&fe->modificationTime, inode->i_mtime); | |
1735 | udf_time_to_disk_stamp(&fe->attrTime, inode->i_ctime); | |
5ca4e4be | 1736 | memset(&(fe->impIdent), 0, sizeof(struct regid)); |
1da177e4 LT |
1737 | strcpy(fe->impIdent.ident, UDF_ID_DEVELOPER); |
1738 | fe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; | |
1739 | fe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; | |
48d6d8ff MS |
1740 | fe->uniqueID = cpu_to_le64(iinfo->i_unique); |
1741 | fe->lengthExtendedAttr = cpu_to_le32(iinfo->i_lenEAttr); | |
1742 | fe->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc); | |
d5e2cf07 | 1743 | fe->checkpoint = cpu_to_le32(iinfo->i_checkpoint); |
1da177e4 LT |
1744 | fe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_FE); |
1745 | crclen = sizeof(struct fileEntry); | |
cb00ea35 | 1746 | } else { |
4b11111a | 1747 | memcpy(bh->b_data + sizeof(struct extendedFileEntry), |
48d6d8ff | 1748 | iinfo->i_ext.i_data, |
4b11111a MS |
1749 | inode->i_sb->s_blocksize - |
1750 | sizeof(struct extendedFileEntry)); | |
1da177e4 | 1751 | efe->objectSize = cpu_to_le64(inode->i_size); |
b2527bfa | 1752 | efe->logicalBlocksRecorded = cpu_to_le64(lb_recorded); |
1da177e4 | 1753 | |
48d6d8ff MS |
1754 | if (iinfo->i_crtime.tv_sec > inode->i_atime.tv_sec || |
1755 | (iinfo->i_crtime.tv_sec == inode->i_atime.tv_sec && | |
1756 | iinfo->i_crtime.tv_nsec > inode->i_atime.tv_nsec)) | |
1757 | iinfo->i_crtime = inode->i_atime; | |
4b11111a | 1758 | |
48d6d8ff MS |
1759 | if (iinfo->i_crtime.tv_sec > inode->i_mtime.tv_sec || |
1760 | (iinfo->i_crtime.tv_sec == inode->i_mtime.tv_sec && | |
1761 | iinfo->i_crtime.tv_nsec > inode->i_mtime.tv_nsec)) | |
1762 | iinfo->i_crtime = inode->i_mtime; | |
4b11111a | 1763 | |
48d6d8ff MS |
1764 | if (iinfo->i_crtime.tv_sec > inode->i_ctime.tv_sec || |
1765 | (iinfo->i_crtime.tv_sec == inode->i_ctime.tv_sec && | |
1766 | iinfo->i_crtime.tv_nsec > inode->i_ctime.tv_nsec)) | |
1767 | iinfo->i_crtime = inode->i_ctime; | |
1da177e4 | 1768 | |
56774805 MS |
1769 | udf_time_to_disk_stamp(&efe->accessTime, inode->i_atime); |
1770 | udf_time_to_disk_stamp(&efe->modificationTime, inode->i_mtime); | |
1771 | udf_time_to_disk_stamp(&efe->createTime, iinfo->i_crtime); | |
1772 | udf_time_to_disk_stamp(&efe->attrTime, inode->i_ctime); | |
1da177e4 | 1773 | |
5ca4e4be | 1774 | memset(&(efe->impIdent), 0, sizeof(struct regid)); |
1da177e4 LT |
1775 | strcpy(efe->impIdent.ident, UDF_ID_DEVELOPER); |
1776 | efe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; | |
1777 | efe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; | |
48d6d8ff MS |
1778 | efe->uniqueID = cpu_to_le64(iinfo->i_unique); |
1779 | efe->lengthExtendedAttr = cpu_to_le32(iinfo->i_lenEAttr); | |
1780 | efe->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc); | |
d5e2cf07 | 1781 | efe->checkpoint = cpu_to_le32(iinfo->i_checkpoint); |
1da177e4 LT |
1782 | efe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_EFE); |
1783 | crclen = sizeof(struct extendedFileEntry); | |
1784 | } | |
70f19f58 SM |
1785 | |
1786 | finish: | |
48d6d8ff | 1787 | if (iinfo->i_strat4096) { |
1da177e4 LT |
1788 | fe->icbTag.strategyType = cpu_to_le16(4096); |
1789 | fe->icbTag.strategyParameter = cpu_to_le16(1); | |
1790 | fe->icbTag.numEntries = cpu_to_le16(2); | |
cb00ea35 | 1791 | } else { |
1da177e4 LT |
1792 | fe->icbTag.strategyType = cpu_to_le16(4); |
1793 | fe->icbTag.numEntries = cpu_to_le16(1); | |
1794 | } | |
1795 | ||
70f19f58 SM |
1796 | if (iinfo->i_use) |
1797 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_USE; | |
1798 | else if (S_ISDIR(inode->i_mode)) | |
1da177e4 LT |
1799 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_DIRECTORY; |
1800 | else if (S_ISREG(inode->i_mode)) | |
1801 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_REGULAR; | |
1802 | else if (S_ISLNK(inode->i_mode)) | |
1803 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_SYMLINK; | |
1804 | else if (S_ISBLK(inode->i_mode)) | |
1805 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_BLOCK; | |
1806 | else if (S_ISCHR(inode->i_mode)) | |
1807 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_CHAR; | |
1808 | else if (S_ISFIFO(inode->i_mode)) | |
1809 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_FIFO; | |
1810 | else if (S_ISSOCK(inode->i_mode)) | |
1811 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_SOCKET; | |
1812 | ||
48d6d8ff | 1813 | icbflags = iinfo->i_alloc_type | |
28de7948 CG |
1814 | ((inode->i_mode & S_ISUID) ? ICBTAG_FLAG_SETUID : 0) | |
1815 | ((inode->i_mode & S_ISGID) ? ICBTAG_FLAG_SETGID : 0) | | |
1816 | ((inode->i_mode & S_ISVTX) ? ICBTAG_FLAG_STICKY : 0) | | |
1817 | (le16_to_cpu(fe->icbTag.flags) & | |
1818 | ~(ICBTAG_FLAG_AD_MASK | ICBTAG_FLAG_SETUID | | |
1819 | ICBTAG_FLAG_SETGID | ICBTAG_FLAG_STICKY)); | |
1da177e4 LT |
1820 | |
1821 | fe->icbTag.flags = cpu_to_le16(icbflags); | |
6c79e987 | 1822 | if (sbi->s_udfrev >= 0x0200) |
1da177e4 LT |
1823 | fe->descTag.descVersion = cpu_to_le16(3); |
1824 | else | |
1825 | fe->descTag.descVersion = cpu_to_le16(2); | |
6c79e987 | 1826 | fe->descTag.tagSerialNum = cpu_to_le16(sbi->s_serial_number); |
4b11111a | 1827 | fe->descTag.tagLocation = cpu_to_le32( |
48d6d8ff | 1828 | iinfo->i_location.logicalBlockNum); |
aae917cd | 1829 | crclen += iinfo->i_lenEAttr + iinfo->i_lenAlloc - sizeof(struct tag); |
1da177e4 | 1830 | fe->descTag.descCRCLength = cpu_to_le16(crclen); |
5ca4e4be | 1831 | fe->descTag.descCRC = cpu_to_le16(crc_itu_t(0, (char *)fe + sizeof(struct tag), |
f845fced | 1832 | crclen)); |
3f2587bb | 1833 | fe->descTag.tagChecksum = udf_tag_checksum(&fe->descTag); |
1da177e4 | 1834 | |
5833ded9 | 1835 | set_buffer_uptodate(bh); |
aae917cd JK |
1836 | unlock_buffer(bh); |
1837 | ||
1da177e4 LT |
1838 | /* write the data blocks */ |
1839 | mark_buffer_dirty(bh); | |
cb00ea35 | 1840 | if (do_sync) { |
1da177e4 | 1841 | sync_dirty_buffer(bh); |
aae917cd | 1842 | if (buffer_write_io_error(bh)) { |
78ace70c JP |
1843 | udf_warn(inode->i_sb, "IO error syncing udf inode [%08lx]\n", |
1844 | inode->i_ino); | |
1da177e4 LT |
1845 | err = -EIO; |
1846 | } | |
1847 | } | |
3bf25cb4 | 1848 | brelse(bh); |
28de7948 | 1849 | |
1da177e4 LT |
1850 | return err; |
1851 | } | |
1852 | ||
6174c2eb JK |
1853 | struct inode *__udf_iget(struct super_block *sb, struct kernel_lb_addr *ino, |
1854 | bool hidden_inode) | |
1da177e4 LT |
1855 | { |
1856 | unsigned long block = udf_get_lb_pblock(sb, ino, 0); | |
1857 | struct inode *inode = iget_locked(sb, block); | |
6d3d5e86 | 1858 | int err; |
1da177e4 LT |
1859 | |
1860 | if (!inode) | |
6d3d5e86 | 1861 | return ERR_PTR(-ENOMEM); |
1da177e4 | 1862 | |
6d3d5e86 JK |
1863 | if (!(inode->i_state & I_NEW)) |
1864 | return inode; | |
1da177e4 | 1865 | |
6d3d5e86 | 1866 | memcpy(&UDF_I(inode)->i_location, ino, sizeof(struct kernel_lb_addr)); |
6174c2eb | 1867 | err = udf_read_inode(inode, hidden_inode); |
6d3d5e86 JK |
1868 | if (err < 0) { |
1869 | iget_failed(inode); | |
1870 | return ERR_PTR(err); | |
1da177e4 | 1871 | } |
6d3d5e86 | 1872 | unlock_new_inode(inode); |
1da177e4 LT |
1873 | |
1874 | return inode; | |
1da177e4 LT |
1875 | } |
1876 | ||
fcea62ba JK |
1877 | int udf_setup_indirect_aext(struct inode *inode, int block, |
1878 | struct extent_position *epos) | |
1da177e4 | 1879 | { |
fcea62ba JK |
1880 | struct super_block *sb = inode->i_sb; |
1881 | struct buffer_head *bh; | |
1da177e4 | 1882 | struct allocExtDesc *aed; |
fcea62ba JK |
1883 | struct extent_position nepos; |
1884 | struct kernel_lb_addr neloc; | |
1885 | int ver, adsize; | |
1da177e4 | 1886 | |
fcea62ba JK |
1887 | if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
1888 | adsize = sizeof(struct short_ad); | |
1889 | else if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_LONG) | |
1890 | adsize = sizeof(struct long_ad); | |
1da177e4 | 1891 | else |
4f1b1519 | 1892 | return -EIO; |
fcea62ba JK |
1893 | |
1894 | neloc.logicalBlockNum = block; | |
1895 | neloc.partitionReferenceNum = epos->block.partitionReferenceNum; | |
1896 | ||
1897 | bh = udf_tgetblk(sb, udf_get_lb_pblock(sb, &neloc, 0)); | |
1898 | if (!bh) | |
1899 | return -EIO; | |
1900 | lock_buffer(bh); | |
1901 | memset(bh->b_data, 0x00, sb->s_blocksize); | |
1902 | set_buffer_uptodate(bh); | |
1903 | unlock_buffer(bh); | |
1904 | mark_buffer_dirty_inode(bh, inode); | |
1905 | ||
1906 | aed = (struct allocExtDesc *)(bh->b_data); | |
1907 | if (!UDF_QUERY_FLAG(sb, UDF_FLAG_STRICT)) { | |
1908 | aed->previousAllocExtLocation = | |
1909 | cpu_to_le32(epos->block.logicalBlockNum); | |
1910 | } | |
1911 | aed->lengthAllocDescs = cpu_to_le32(0); | |
1912 | if (UDF_SB(sb)->s_udfrev >= 0x0200) | |
1913 | ver = 3; | |
1da177e4 | 1914 | else |
fcea62ba JK |
1915 | ver = 2; |
1916 | udf_new_tag(bh->b_data, TAG_IDENT_AED, ver, 1, block, | |
1917 | sizeof(struct tag)); | |
1918 | ||
1919 | nepos.block = neloc; | |
1920 | nepos.offset = sizeof(struct allocExtDesc); | |
1921 | nepos.bh = bh; | |
1922 | ||
1923 | /* | |
1924 | * Do we have to copy current last extent to make space for indirect | |
1925 | * one? | |
1926 | */ | |
1927 | if (epos->offset + adsize > sb->s_blocksize) { | |
1928 | struct kernel_lb_addr cp_loc; | |
1929 | uint32_t cp_len; | |
1930 | int cp_type; | |
1931 | ||
1932 | epos->offset -= adsize; | |
1933 | cp_type = udf_current_aext(inode, epos, &cp_loc, &cp_len, 0); | |
1934 | cp_len |= ((uint32_t)cp_type) << 30; | |
1935 | ||
1936 | __udf_add_aext(inode, &nepos, &cp_loc, cp_len, 1); | |
1937 | udf_write_aext(inode, epos, &nepos.block, | |
1938 | sb->s_blocksize | EXT_NEXT_EXTENT_ALLOCDECS, 0); | |
1939 | } else { | |
1940 | __udf_add_aext(inode, epos, &nepos.block, | |
1941 | sb->s_blocksize | EXT_NEXT_EXTENT_ALLOCDECS, 0); | |
1942 | } | |
1943 | ||
1944 | brelse(epos->bh); | |
1945 | *epos = nepos; | |
1946 | ||
1947 | return 0; | |
1948 | } | |
1949 | ||
1950 | /* | |
1951 | * Append extent at the given position - should be the first free one in inode | |
1952 | * / indirect extent. This function assumes there is enough space in the inode | |
1953 | * or indirect extent. Use udf_add_aext() if you didn't check for this before. | |
1954 | */ | |
1955 | int __udf_add_aext(struct inode *inode, struct extent_position *epos, | |
1956 | struct kernel_lb_addr *eloc, uint32_t elen, int inc) | |
1957 | { | |
1958 | struct udf_inode_info *iinfo = UDF_I(inode); | |
1959 | struct allocExtDesc *aed; | |
1960 | int adsize; | |
1da177e4 | 1961 | |
48d6d8ff | 1962 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
5ca4e4be | 1963 | adsize = sizeof(struct short_ad); |
48d6d8ff | 1964 | else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
5ca4e4be | 1965 | adsize = sizeof(struct long_ad); |
1da177e4 | 1966 | else |
7e49b6f2 | 1967 | return -EIO; |
1da177e4 | 1968 | |
fcea62ba JK |
1969 | if (!epos->bh) { |
1970 | WARN_ON(iinfo->i_lenAlloc != | |
1971 | epos->offset - udf_file_entry_alloc_offset(inode)); | |
1972 | } else { | |
1973 | aed = (struct allocExtDesc *)epos->bh->b_data; | |
1974 | WARN_ON(le32_to_cpu(aed->lengthAllocDescs) != | |
1975 | epos->offset - sizeof(struct allocExtDesc)); | |
1976 | WARN_ON(epos->offset + adsize > inode->i_sb->s_blocksize); | |
1da177e4 LT |
1977 | } |
1978 | ||
7e49b6f2 | 1979 | udf_write_aext(inode, epos, eloc, elen, inc); |
1da177e4 | 1980 | |
cb00ea35 | 1981 | if (!epos->bh) { |
48d6d8ff | 1982 | iinfo->i_lenAlloc += adsize; |
1da177e4 | 1983 | mark_inode_dirty(inode); |
cb00ea35 | 1984 | } else { |
ff116fc8 | 1985 | aed = (struct allocExtDesc *)epos->bh->b_data; |
c2104fda | 1986 | le32_add_cpu(&aed->lengthAllocDescs, adsize); |
4b11111a MS |
1987 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
1988 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) | |
1989 | udf_update_tag(epos->bh->b_data, | |
1990 | epos->offset + (inc ? 0 : adsize)); | |
1da177e4 | 1991 | else |
4b11111a MS |
1992 | udf_update_tag(epos->bh->b_data, |
1993 | sizeof(struct allocExtDesc)); | |
ff116fc8 | 1994 | mark_buffer_dirty_inode(epos->bh, inode); |
1da177e4 LT |
1995 | } |
1996 | ||
7e49b6f2 | 1997 | return 0; |
1da177e4 LT |
1998 | } |
1999 | ||
fcea62ba JK |
2000 | /* |
2001 | * Append extent at given position - should be the first free one in inode | |
2002 | * / indirect extent. Takes care of allocating and linking indirect blocks. | |
2003 | */ | |
2004 | int udf_add_aext(struct inode *inode, struct extent_position *epos, | |
2005 | struct kernel_lb_addr *eloc, uint32_t elen, int inc) | |
2006 | { | |
2007 | int adsize; | |
2008 | struct super_block *sb = inode->i_sb; | |
2009 | ||
2010 | if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_SHORT) | |
2011 | adsize = sizeof(struct short_ad); | |
2012 | else if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_LONG) | |
2013 | adsize = sizeof(struct long_ad); | |
2014 | else | |
2015 | return -EIO; | |
2016 | ||
2017 | if (epos->offset + (2 * adsize) > sb->s_blocksize) { | |
2018 | int err; | |
2019 | int new_block; | |
2020 | ||
2021 | new_block = udf_new_block(sb, NULL, | |
2022 | epos->block.partitionReferenceNum, | |
2023 | epos->block.logicalBlockNum, &err); | |
2024 | if (!new_block) | |
2025 | return -ENOSPC; | |
2026 | ||
2027 | err = udf_setup_indirect_aext(inode, new_block, epos); | |
2028 | if (err) | |
2029 | return err; | |
2030 | } | |
2031 | ||
2032 | return __udf_add_aext(inode, epos, eloc, elen, inc); | |
2033 | } | |
2034 | ||
7e49b6f2 JK |
2035 | void udf_write_aext(struct inode *inode, struct extent_position *epos, |
2036 | struct kernel_lb_addr *eloc, uint32_t elen, int inc) | |
1da177e4 LT |
2037 | { |
2038 | int adsize; | |
2039 | uint8_t *ptr; | |
5ca4e4be PE |
2040 | struct short_ad *sad; |
2041 | struct long_ad *lad; | |
48d6d8ff | 2042 | struct udf_inode_info *iinfo = UDF_I(inode); |
1da177e4 | 2043 | |
ff116fc8 | 2044 | if (!epos->bh) |
48d6d8ff | 2045 | ptr = iinfo->i_ext.i_data + epos->offset - |
4b11111a | 2046 | udf_file_entry_alloc_offset(inode) + |
48d6d8ff | 2047 | iinfo->i_lenEAttr; |
1da177e4 | 2048 | else |
ff116fc8 | 2049 | ptr = epos->bh->b_data + epos->offset; |
1da177e4 | 2050 | |
48d6d8ff | 2051 | switch (iinfo->i_alloc_type) { |
cb00ea35 | 2052 | case ICBTAG_FLAG_AD_SHORT: |
5ca4e4be | 2053 | sad = (struct short_ad *)ptr; |
28de7948 | 2054 | sad->extLength = cpu_to_le32(elen); |
97e961fd | 2055 | sad->extPosition = cpu_to_le32(eloc->logicalBlockNum); |
5ca4e4be | 2056 | adsize = sizeof(struct short_ad); |
28de7948 | 2057 | break; |
cb00ea35 | 2058 | case ICBTAG_FLAG_AD_LONG: |
5ca4e4be | 2059 | lad = (struct long_ad *)ptr; |
28de7948 | 2060 | lad->extLength = cpu_to_le32(elen); |
97e961fd | 2061 | lad->extLocation = cpu_to_lelb(*eloc); |
28de7948 | 2062 | memset(lad->impUse, 0x00, sizeof(lad->impUse)); |
5ca4e4be | 2063 | adsize = sizeof(struct long_ad); |
28de7948 | 2064 | break; |
cb00ea35 | 2065 | default: |
7e49b6f2 | 2066 | return; |
1da177e4 LT |
2067 | } |
2068 | ||
cb00ea35 | 2069 | if (epos->bh) { |
28de7948 | 2070 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
6c79e987 | 2071 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) { |
4b11111a MS |
2072 | struct allocExtDesc *aed = |
2073 | (struct allocExtDesc *)epos->bh->b_data; | |
ff116fc8 | 2074 | udf_update_tag(epos->bh->b_data, |
4b11111a MS |
2075 | le32_to_cpu(aed->lengthAllocDescs) + |
2076 | sizeof(struct allocExtDesc)); | |
1da177e4 | 2077 | } |
ff116fc8 | 2078 | mark_buffer_dirty_inode(epos->bh, inode); |
28de7948 | 2079 | } else { |
1da177e4 | 2080 | mark_inode_dirty(inode); |
28de7948 | 2081 | } |
1da177e4 LT |
2082 | |
2083 | if (inc) | |
ff116fc8 | 2084 | epos->offset += adsize; |
1da177e4 LT |
2085 | } |
2086 | ||
b0918d9f VN |
2087 | /* |
2088 | * Only 1 indirect extent in a row really makes sense but allow upto 16 in case | |
2089 | * someone does some weird stuff. | |
2090 | */ | |
2091 | #define UDF_MAX_INDIR_EXTS 16 | |
2092 | ||
4b11111a | 2093 | int8_t udf_next_aext(struct inode *inode, struct extent_position *epos, |
5ca4e4be | 2094 | struct kernel_lb_addr *eloc, uint32_t *elen, int inc) |
1da177e4 LT |
2095 | { |
2096 | int8_t etype; | |
b0918d9f | 2097 | unsigned int indirections = 0; |
1da177e4 | 2098 | |
ff116fc8 | 2099 | while ((etype = udf_current_aext(inode, epos, eloc, elen, inc)) == |
cb00ea35 | 2100 | (EXT_NEXT_EXTENT_ALLOCDECS >> 30)) { |
4b11111a | 2101 | int block; |
b0918d9f VN |
2102 | |
2103 | if (++indirections > UDF_MAX_INDIR_EXTS) { | |
2104 | udf_err(inode->i_sb, | |
2105 | "too many indirect extents in inode %lu\n", | |
2106 | inode->i_ino); | |
2107 | return -1; | |
2108 | } | |
2109 | ||
ff116fc8 JK |
2110 | epos->block = *eloc; |
2111 | epos->offset = sizeof(struct allocExtDesc); | |
3bf25cb4 | 2112 | brelse(epos->bh); |
97e961fd | 2113 | block = udf_get_lb_pblock(inode->i_sb, &epos->block, 0); |
4b11111a MS |
2114 | epos->bh = udf_tread(inode->i_sb, block); |
2115 | if (!epos->bh) { | |
2116 | udf_debug("reading block %d failed!\n", block); | |
1da177e4 LT |
2117 | return -1; |
2118 | } | |
2119 | } | |
2120 | ||
2121 | return etype; | |
2122 | } | |
2123 | ||
4b11111a | 2124 | int8_t udf_current_aext(struct inode *inode, struct extent_position *epos, |
5ca4e4be | 2125 | struct kernel_lb_addr *eloc, uint32_t *elen, int inc) |
1da177e4 LT |
2126 | { |
2127 | int alen; | |
2128 | int8_t etype; | |
2129 | uint8_t *ptr; | |
5ca4e4be PE |
2130 | struct short_ad *sad; |
2131 | struct long_ad *lad; | |
48d6d8ff | 2132 | struct udf_inode_info *iinfo = UDF_I(inode); |
28de7948 | 2133 | |
cb00ea35 | 2134 | if (!epos->bh) { |
ff116fc8 JK |
2135 | if (!epos->offset) |
2136 | epos->offset = udf_file_entry_alloc_offset(inode); | |
48d6d8ff | 2137 | ptr = iinfo->i_ext.i_data + epos->offset - |
4b11111a | 2138 | udf_file_entry_alloc_offset(inode) + |
48d6d8ff | 2139 | iinfo->i_lenEAttr; |
4b11111a | 2140 | alen = udf_file_entry_alloc_offset(inode) + |
48d6d8ff | 2141 | iinfo->i_lenAlloc; |
cb00ea35 | 2142 | } else { |
ff116fc8 JK |
2143 | if (!epos->offset) |
2144 | epos->offset = sizeof(struct allocExtDesc); | |
2145 | ptr = epos->bh->b_data + epos->offset; | |
28de7948 | 2146 | alen = sizeof(struct allocExtDesc) + |
4b11111a MS |
2147 | le32_to_cpu(((struct allocExtDesc *)epos->bh->b_data)-> |
2148 | lengthAllocDescs); | |
1da177e4 LT |
2149 | } |
2150 | ||
48d6d8ff | 2151 | switch (iinfo->i_alloc_type) { |
cb00ea35 | 2152 | case ICBTAG_FLAG_AD_SHORT: |
4b11111a MS |
2153 | sad = udf_get_fileshortad(ptr, alen, &epos->offset, inc); |
2154 | if (!sad) | |
28de7948 CG |
2155 | return -1; |
2156 | etype = le32_to_cpu(sad->extLength) >> 30; | |
2157 | eloc->logicalBlockNum = le32_to_cpu(sad->extPosition); | |
4b11111a | 2158 | eloc->partitionReferenceNum = |
48d6d8ff | 2159 | iinfo->i_location.partitionReferenceNum; |
28de7948 CG |
2160 | *elen = le32_to_cpu(sad->extLength) & UDF_EXTENT_LENGTH_MASK; |
2161 | break; | |
cb00ea35 | 2162 | case ICBTAG_FLAG_AD_LONG: |
4b11111a MS |
2163 | lad = udf_get_filelongad(ptr, alen, &epos->offset, inc); |
2164 | if (!lad) | |
1da177e4 | 2165 | return -1; |
28de7948 CG |
2166 | etype = le32_to_cpu(lad->extLength) >> 30; |
2167 | *eloc = lelb_to_cpu(lad->extLocation); | |
2168 | *elen = le32_to_cpu(lad->extLength) & UDF_EXTENT_LENGTH_MASK; | |
2169 | break; | |
2170 | default: | |
a983f368 | 2171 | udf_debug("alloc_type = %d unsupported\n", iinfo->i_alloc_type); |
28de7948 | 2172 | return -1; |
1da177e4 LT |
2173 | } |
2174 | ||
2175 | return etype; | |
2176 | } | |
2177 | ||
28de7948 | 2178 | static int8_t udf_insert_aext(struct inode *inode, struct extent_position epos, |
5ca4e4be | 2179 | struct kernel_lb_addr neloc, uint32_t nelen) |
1da177e4 | 2180 | { |
5ca4e4be | 2181 | struct kernel_lb_addr oeloc; |
1da177e4 LT |
2182 | uint32_t oelen; |
2183 | int8_t etype; | |
2184 | ||
ff116fc8 | 2185 | if (epos.bh) |
3bf25cb4 | 2186 | get_bh(epos.bh); |
1da177e4 | 2187 | |
cb00ea35 | 2188 | while ((etype = udf_next_aext(inode, &epos, &oeloc, &oelen, 0)) != -1) { |
97e961fd | 2189 | udf_write_aext(inode, &epos, &neloc, nelen, 1); |
1da177e4 LT |
2190 | neloc = oeloc; |
2191 | nelen = (etype << 30) | oelen; | |
2192 | } | |
97e961fd | 2193 | udf_add_aext(inode, &epos, &neloc, nelen, 1); |
3bf25cb4 | 2194 | brelse(epos.bh); |
28de7948 | 2195 | |
1da177e4 LT |
2196 | return (nelen >> 30); |
2197 | } | |
2198 | ||
4b11111a | 2199 | int8_t udf_delete_aext(struct inode *inode, struct extent_position epos, |
5ca4e4be | 2200 | struct kernel_lb_addr eloc, uint32_t elen) |
1da177e4 | 2201 | { |
ff116fc8 JK |
2202 | struct extent_position oepos; |
2203 | int adsize; | |
1da177e4 LT |
2204 | int8_t etype; |
2205 | struct allocExtDesc *aed; | |
48d6d8ff | 2206 | struct udf_inode_info *iinfo; |
1da177e4 | 2207 | |
cb00ea35 | 2208 | if (epos.bh) { |
3bf25cb4 JK |
2209 | get_bh(epos.bh); |
2210 | get_bh(epos.bh); | |
1da177e4 LT |
2211 | } |
2212 | ||
48d6d8ff MS |
2213 | iinfo = UDF_I(inode); |
2214 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) | |
5ca4e4be | 2215 | adsize = sizeof(struct short_ad); |
48d6d8ff | 2216 | else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
5ca4e4be | 2217 | adsize = sizeof(struct long_ad); |
1da177e4 LT |
2218 | else |
2219 | adsize = 0; | |
2220 | ||
ff116fc8 JK |
2221 | oepos = epos; |
2222 | if (udf_next_aext(inode, &epos, &eloc, &elen, 1) == -1) | |
1da177e4 LT |
2223 | return -1; |
2224 | ||
cb00ea35 | 2225 | while ((etype = udf_next_aext(inode, &epos, &eloc, &elen, 1)) != -1) { |
97e961fd | 2226 | udf_write_aext(inode, &oepos, &eloc, (etype << 30) | elen, 1); |
cb00ea35 | 2227 | if (oepos.bh != epos.bh) { |
ff116fc8 | 2228 | oepos.block = epos.block; |
3bf25cb4 JK |
2229 | brelse(oepos.bh); |
2230 | get_bh(epos.bh); | |
ff116fc8 JK |
2231 | oepos.bh = epos.bh; |
2232 | oepos.offset = epos.offset - adsize; | |
1da177e4 LT |
2233 | } |
2234 | } | |
5ca4e4be | 2235 | memset(&eloc, 0x00, sizeof(struct kernel_lb_addr)); |
1da177e4 LT |
2236 | elen = 0; |
2237 | ||
cb00ea35 | 2238 | if (epos.bh != oepos.bh) { |
97e961fd PE |
2239 | udf_free_blocks(inode->i_sb, inode, &epos.block, 0, 1); |
2240 | udf_write_aext(inode, &oepos, &eloc, elen, 1); | |
2241 | udf_write_aext(inode, &oepos, &eloc, elen, 1); | |
cb00ea35 | 2242 | if (!oepos.bh) { |
48d6d8ff | 2243 | iinfo->i_lenAlloc -= (adsize * 2); |
1da177e4 | 2244 | mark_inode_dirty(inode); |
cb00ea35 | 2245 | } else { |
ff116fc8 | 2246 | aed = (struct allocExtDesc *)oepos.bh->b_data; |
c2104fda | 2247 | le32_add_cpu(&aed->lengthAllocDescs, -(2 * adsize)); |
28de7948 | 2248 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
6c79e987 | 2249 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) |
4b11111a MS |
2250 | udf_update_tag(oepos.bh->b_data, |
2251 | oepos.offset - (2 * adsize)); | |
1da177e4 | 2252 | else |
4b11111a MS |
2253 | udf_update_tag(oepos.bh->b_data, |
2254 | sizeof(struct allocExtDesc)); | |
ff116fc8 | 2255 | mark_buffer_dirty_inode(oepos.bh, inode); |
1da177e4 | 2256 | } |
cb00ea35 | 2257 | } else { |
97e961fd | 2258 | udf_write_aext(inode, &oepos, &eloc, elen, 1); |
cb00ea35 | 2259 | if (!oepos.bh) { |
48d6d8ff | 2260 | iinfo->i_lenAlloc -= adsize; |
1da177e4 | 2261 | mark_inode_dirty(inode); |
cb00ea35 | 2262 | } else { |
ff116fc8 | 2263 | aed = (struct allocExtDesc *)oepos.bh->b_data; |
c2104fda | 2264 | le32_add_cpu(&aed->lengthAllocDescs, -adsize); |
28de7948 | 2265 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
6c79e987 | 2266 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) |
4b11111a MS |
2267 | udf_update_tag(oepos.bh->b_data, |
2268 | epos.offset - adsize); | |
1da177e4 | 2269 | else |
4b11111a MS |
2270 | udf_update_tag(oepos.bh->b_data, |
2271 | sizeof(struct allocExtDesc)); | |
ff116fc8 | 2272 | mark_buffer_dirty_inode(oepos.bh, inode); |
1da177e4 LT |
2273 | } |
2274 | } | |
647bd61a | 2275 | |
3bf25cb4 JK |
2276 | brelse(epos.bh); |
2277 | brelse(oepos.bh); | |
28de7948 | 2278 | |
1da177e4 LT |
2279 | return (elen >> 30); |
2280 | } | |
2281 | ||
4b11111a | 2282 | int8_t inode_bmap(struct inode *inode, sector_t block, |
5ca4e4be | 2283 | struct extent_position *pos, struct kernel_lb_addr *eloc, |
4b11111a | 2284 | uint32_t *elen, sector_t *offset) |
1da177e4 | 2285 | { |
4b11111a | 2286 | unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; |
cb00ea35 | 2287 | loff_t lbcount = 0, bcount = |
4b11111a | 2288 | (loff_t) block << blocksize_bits; |
1da177e4 | 2289 | int8_t etype; |
48d6d8ff | 2290 | struct udf_inode_info *iinfo; |
1da177e4 | 2291 | |
48d6d8ff | 2292 | iinfo = UDF_I(inode); |
99600051 NJ |
2293 | if (!udf_read_extent_cache(inode, bcount, &lbcount, pos)) { |
2294 | pos->offset = 0; | |
2295 | pos->block = iinfo->i_location; | |
2296 | pos->bh = NULL; | |
2297 | } | |
1da177e4 | 2298 | *elen = 0; |
cb00ea35 | 2299 | do { |
4b11111a MS |
2300 | etype = udf_next_aext(inode, pos, eloc, elen, 1); |
2301 | if (etype == -1) { | |
2302 | *offset = (bcount - lbcount) >> blocksize_bits; | |
48d6d8ff | 2303 | iinfo->i_lenExtents = lbcount; |
1da177e4 LT |
2304 | return -1; |
2305 | } | |
2306 | lbcount += *elen; | |
2307 | } while (lbcount <= bcount); | |
99600051 NJ |
2308 | /* update extent cache */ |
2309 | udf_update_extent_cache(inode, lbcount - *elen, pos, 1); | |
4b11111a | 2310 | *offset = (bcount + *elen - lbcount) >> blocksize_bits; |
1da177e4 LT |
2311 | |
2312 | return etype; | |
2313 | } | |
2314 | ||
60448b1d | 2315 | long udf_block_map(struct inode *inode, sector_t block) |
1da177e4 | 2316 | { |
5ca4e4be | 2317 | struct kernel_lb_addr eloc; |
ff116fc8 | 2318 | uint32_t elen; |
60448b1d | 2319 | sector_t offset; |
28de7948 | 2320 | struct extent_position epos = {}; |
1da177e4 LT |
2321 | int ret; |
2322 | ||
4d0fb621 | 2323 | down_read(&UDF_I(inode)->i_data_sem); |
1da177e4 | 2324 | |
4b11111a MS |
2325 | if (inode_bmap(inode, block, &epos, &eloc, &elen, &offset) == |
2326 | (EXT_RECORDED_ALLOCATED >> 30)) | |
97e961fd | 2327 | ret = udf_get_lb_pblock(inode->i_sb, &eloc, offset); |
1da177e4 LT |
2328 | else |
2329 | ret = 0; | |
2330 | ||
4d0fb621 | 2331 | up_read(&UDF_I(inode)->i_data_sem); |
3bf25cb4 | 2332 | brelse(epos.bh); |
1da177e4 LT |
2333 | |
2334 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_VARCONV)) | |
2335 | return udf_fixed_to_variable(ret); | |
2336 | else | |
2337 | return ret; | |
2338 | } |