Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * inode.c | |
3 | * | |
4 | * PURPOSE | |
5 | * Inode handling routines for the OSTA-UDF(tm) filesystem. | |
6 | * | |
1da177e4 LT |
7 | * COPYRIGHT |
8 | * This file is distributed under the terms of the GNU General Public | |
9 | * License (GPL). Copies of the GPL can be obtained from: | |
10 | * ftp://prep.ai.mit.edu/pub/gnu/GPL | |
11 | * Each contributing author retains all rights to their own work. | |
12 | * | |
13 | * (C) 1998 Dave Boynton | |
14 | * (C) 1998-2004 Ben Fennema | |
15 | * (C) 1999-2000 Stelias Computing Inc | |
16 | * | |
17 | * HISTORY | |
18 | * | |
19 | * 10/04/98 dgb Added rudimentary directory functions | |
20 | * 10/07/98 Fully working udf_block_map! It works! | |
21 | * 11/25/98 bmap altered to better support extents | |
4b11111a MS |
22 | * 12/06/98 blf partition support in udf_iget, udf_block_map |
23 | * and udf_read_inode | |
1da177e4 LT |
24 | * 12/12/98 rewrote udf_block_map to handle next extents and descs across |
25 | * block boundaries (which is not actually allowed) | |
26 | * 12/20/98 added support for strategy 4096 | |
27 | * 03/07/99 rewrote udf_block_map (again) | |
28 | * New funcs, inode_bmap, udf_next_aext | |
29 | * 04/19/99 Support for writing device EA's for major/minor # | |
30 | */ | |
31 | ||
32 | #include "udfdecl.h" | |
33 | #include <linux/mm.h> | |
1da177e4 LT |
34 | #include <linux/module.h> |
35 | #include <linux/pagemap.h> | |
1da177e4 LT |
36 | #include <linux/writeback.h> |
37 | #include <linux/slab.h> | |
f845fced | 38 | #include <linux/crc-itu-t.h> |
bc112323 | 39 | #include <linux/mpage.h> |
e2e40f2c | 40 | #include <linux/uio.h> |
1da177e4 LT |
41 | |
42 | #include "udf_i.h" | |
43 | #include "udf_sb.h" | |
44 | ||
45 | MODULE_AUTHOR("Ben Fennema"); | |
46 | MODULE_DESCRIPTION("Universal Disk Format Filesystem"); | |
47 | MODULE_LICENSE("GPL"); | |
48 | ||
49 | #define EXTENT_MERGE_SIZE 5 | |
50 | ||
faa17292 | 51 | static umode_t udf_convert_permissions(struct fileEntry *); |
1da177e4 | 52 | static int udf_update_inode(struct inode *, int); |
49521de1 | 53 | static int udf_sync_inode(struct inode *inode); |
647bd61a | 54 | static int udf_alloc_i_data(struct inode *inode, size_t size); |
7b0b0933 | 55 | static sector_t inode_getblk(struct inode *, sector_t, int *, int *); |
ff116fc8 | 56 | static int8_t udf_insert_aext(struct inode *, struct extent_position, |
5ca4e4be | 57 | struct kernel_lb_addr, uint32_t); |
1da177e4 | 58 | static void udf_split_extents(struct inode *, int *, int, int, |
5ca4e4be | 59 | struct kernel_long_ad[EXTENT_MERGE_SIZE], int *); |
1da177e4 | 60 | static void udf_prealloc_extents(struct inode *, int, int, |
5ca4e4be | 61 | struct kernel_long_ad[EXTENT_MERGE_SIZE], int *); |
1da177e4 | 62 | static void udf_merge_extents(struct inode *, |
5ca4e4be | 63 | struct kernel_long_ad[EXTENT_MERGE_SIZE], int *); |
1da177e4 | 64 | static void udf_update_extents(struct inode *, |
5ca4e4be | 65 | struct kernel_long_ad[EXTENT_MERGE_SIZE], int, int, |
cb00ea35 | 66 | struct extent_position *); |
1da177e4 LT |
67 | static int udf_get_block(struct inode *, sector_t, struct buffer_head *, int); |
68 | ||
99600051 NJ |
69 | static void __udf_clear_extent_cache(struct inode *inode) |
70 | { | |
71 | struct udf_inode_info *iinfo = UDF_I(inode); | |
72 | ||
73 | if (iinfo->cached_extent.lstart != -1) { | |
74 | brelse(iinfo->cached_extent.epos.bh); | |
75 | iinfo->cached_extent.lstart = -1; | |
76 | } | |
77 | } | |
78 | ||
79 | /* Invalidate extent cache */ | |
80 | static void udf_clear_extent_cache(struct inode *inode) | |
81 | { | |
82 | struct udf_inode_info *iinfo = UDF_I(inode); | |
83 | ||
84 | spin_lock(&iinfo->i_extent_cache_lock); | |
85 | __udf_clear_extent_cache(inode); | |
86 | spin_unlock(&iinfo->i_extent_cache_lock); | |
87 | } | |
88 | ||
89 | /* Return contents of extent cache */ | |
90 | static int udf_read_extent_cache(struct inode *inode, loff_t bcount, | |
91 | loff_t *lbcount, struct extent_position *pos) | |
92 | { | |
93 | struct udf_inode_info *iinfo = UDF_I(inode); | |
94 | int ret = 0; | |
95 | ||
96 | spin_lock(&iinfo->i_extent_cache_lock); | |
97 | if ((iinfo->cached_extent.lstart <= bcount) && | |
98 | (iinfo->cached_extent.lstart != -1)) { | |
99 | /* Cache hit */ | |
100 | *lbcount = iinfo->cached_extent.lstart; | |
101 | memcpy(pos, &iinfo->cached_extent.epos, | |
102 | sizeof(struct extent_position)); | |
103 | if (pos->bh) | |
104 | get_bh(pos->bh); | |
105 | ret = 1; | |
106 | } | |
107 | spin_unlock(&iinfo->i_extent_cache_lock); | |
108 | return ret; | |
109 | } | |
110 | ||
111 | /* Add extent to extent cache */ | |
112 | static void udf_update_extent_cache(struct inode *inode, loff_t estart, | |
113 | struct extent_position *pos, int next_epos) | |
114 | { | |
115 | struct udf_inode_info *iinfo = UDF_I(inode); | |
116 | ||
117 | spin_lock(&iinfo->i_extent_cache_lock); | |
118 | /* Invalidate previously cached extent */ | |
119 | __udf_clear_extent_cache(inode); | |
120 | if (pos->bh) | |
121 | get_bh(pos->bh); | |
122 | memcpy(&iinfo->cached_extent.epos, pos, | |
123 | sizeof(struct extent_position)); | |
124 | iinfo->cached_extent.lstart = estart; | |
125 | if (next_epos) | |
126 | switch (iinfo->i_alloc_type) { | |
127 | case ICBTAG_FLAG_AD_SHORT: | |
128 | iinfo->cached_extent.epos.offset -= | |
129 | sizeof(struct short_ad); | |
130 | break; | |
131 | case ICBTAG_FLAG_AD_LONG: | |
132 | iinfo->cached_extent.epos.offset -= | |
133 | sizeof(struct long_ad); | |
134 | } | |
135 | spin_unlock(&iinfo->i_extent_cache_lock); | |
136 | } | |
b1e32126 | 137 | |
3aac2b62 | 138 | void udf_evict_inode(struct inode *inode) |
1da177e4 | 139 | { |
2c948b3f | 140 | struct udf_inode_info *iinfo = UDF_I(inode); |
3aac2b62 AV |
141 | int want_delete = 0; |
142 | ||
3aac2b62 AV |
143 | if (!inode->i_nlink && !is_bad_inode(inode)) { |
144 | want_delete = 1; | |
7e49b6f2 | 145 | udf_setsize(inode, 0); |
3aac2b62 | 146 | udf_update_inode(inode, IS_SYNC(inode)); |
91b0abe3 JW |
147 | } |
148 | truncate_inode_pages_final(&inode->i_data); | |
3aac2b62 | 149 | invalidate_inode_buffers(inode); |
dbd5768f | 150 | clear_inode(inode); |
2c948b3f JK |
151 | if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB && |
152 | inode->i_size != iinfo->i_lenExtents) { | |
78ace70c JP |
153 | 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", |
154 | inode->i_ino, inode->i_mode, | |
155 | (unsigned long long)inode->i_size, | |
156 | (unsigned long long)iinfo->i_lenExtents); | |
1da177e4 | 157 | } |
48d6d8ff MS |
158 | kfree(iinfo->i_ext.i_data); |
159 | iinfo->i_ext.i_data = NULL; | |
99600051 | 160 | udf_clear_extent_cache(inode); |
3aac2b62 | 161 | if (want_delete) { |
3aac2b62 | 162 | udf_free_inode(inode); |
3aac2b62 | 163 | } |
1da177e4 LT |
164 | } |
165 | ||
5eec54fc IA |
166 | static void udf_write_failed(struct address_space *mapping, loff_t to) |
167 | { | |
168 | struct inode *inode = mapping->host; | |
169 | struct udf_inode_info *iinfo = UDF_I(inode); | |
170 | loff_t isize = inode->i_size; | |
171 | ||
172 | if (to > isize) { | |
7caef267 | 173 | truncate_pagecache(inode, isize); |
5eec54fc IA |
174 | if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { |
175 | down_write(&iinfo->i_data_sem); | |
99600051 | 176 | udf_clear_extent_cache(inode); |
5eec54fc IA |
177 | udf_truncate_extents(inode); |
178 | up_write(&iinfo->i_data_sem); | |
179 | } | |
180 | } | |
181 | } | |
182 | ||
1da177e4 LT |
183 | static int udf_writepage(struct page *page, struct writeback_control *wbc) |
184 | { | |
185 | return block_write_full_page(page, udf_get_block, wbc); | |
186 | } | |
187 | ||
378b8e1a NJ |
188 | static int udf_writepages(struct address_space *mapping, |
189 | struct writeback_control *wbc) | |
190 | { | |
191 | return mpage_writepages(mapping, wbc, udf_get_block); | |
192 | } | |
193 | ||
1da177e4 LT |
194 | static int udf_readpage(struct file *file, struct page *page) |
195 | { | |
bc112323 NJ |
196 | return mpage_readpage(page, udf_get_block); |
197 | } | |
198 | ||
199 | static int udf_readpages(struct file *file, struct address_space *mapping, | |
200 | struct list_head *pages, unsigned nr_pages) | |
201 | { | |
202 | return mpage_readpages(mapping, pages, nr_pages, udf_get_block); | |
1da177e4 LT |
203 | } |
204 | ||
be021ee4 NP |
205 | static int udf_write_begin(struct file *file, struct address_space *mapping, |
206 | loff_t pos, unsigned len, unsigned flags, | |
207 | struct page **pagep, void **fsdata) | |
1da177e4 | 208 | { |
155130a4 CH |
209 | int ret; |
210 | ||
211 | ret = block_write_begin(mapping, pos, len, flags, pagep, udf_get_block); | |
5eec54fc IA |
212 | if (unlikely(ret)) |
213 | udf_write_failed(mapping, pos + len); | |
214 | return ret; | |
215 | } | |
155130a4 | 216 | |
22c6186e | 217 | static ssize_t udf_direct_IO(struct kiocb *iocb, struct iov_iter *iter, |
d8d3d94b | 218 | loff_t offset) |
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 | ||
17f8c842 | 226 | ret = blockdev_direct_IO(iocb, inode, iter, offset, udf_get_block); |
6f673763 | 227 | if (unlikely(ret < 0 && iov_iter_rw(iter) == WRITE)) |
a6cbcd4a | 228 | udf_write_failed(mapping, offset + 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 | ||
09ebb17a | 265 | WARN_ON_ONCE(!mutex_is_locked(&inode->i_mutex)); |
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 MS |
289 | memset(kaddr + iinfo->i_lenAlloc, 0x00, |
290 | PAGE_CACHE_SIZE - iinfo->i_lenAlloc); | |
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 | } |
1da177e4 | 322 | page_cache_release(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++; |
4b11111a | 542 | } else |
97e961fd | 543 | udf_write_aext(inode, last_pos, &last_ext->extLocation, |
4b11111a | 544 | last_ext->extLength, 1); |
28de7948 | 545 | |
31170b6a JK |
546 | /* Managed to do everything necessary? */ |
547 | if (!blocks) | |
548 | goto out; | |
549 | ||
550 | /* All further extents will be NOT_RECORDED_NOT_ALLOCATED */ | |
551 | last_ext->extLocation.logicalBlockNum = 0; | |
4b11111a | 552 | last_ext->extLocation.partitionReferenceNum = 0; |
28de7948 | 553 | add = (1 << (30-sb->s_blocksize_bits)) - 1; |
4b11111a MS |
554 | last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | |
555 | (add << sb->s_blocksize_bits); | |
28de7948 | 556 | |
31170b6a JK |
557 | /* Create enough extents to cover the whole hole */ |
558 | while (blocks > add) { | |
559 | blocks -= add; | |
7e49b6f2 JK |
560 | err = udf_add_aext(inode, last_pos, &last_ext->extLocation, |
561 | last_ext->extLength, 1); | |
562 | if (err) | |
563 | return err; | |
31170b6a JK |
564 | count++; |
565 | } | |
566 | if (blocks) { | |
567 | last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | | |
28de7948 | 568 | (blocks << sb->s_blocksize_bits); |
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 | } | |
28de7948 CG |
575 | |
576 | out: | |
31170b6a JK |
577 | /* Do we have some preallocated blocks saved? */ |
578 | if (prealloc_len) { | |
7e49b6f2 JK |
579 | err = udf_add_aext(inode, last_pos, &prealloc_loc, |
580 | prealloc_len, 1); | |
581 | if (err) | |
582 | return err; | |
31170b6a JK |
583 | last_ext->extLocation = prealloc_loc; |
584 | last_ext->extLength = prealloc_len; | |
585 | count++; | |
586 | } | |
28de7948 | 587 | |
31170b6a | 588 | /* last_pos should point to the last written extent... */ |
48d6d8ff | 589 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
5ca4e4be | 590 | last_pos->offset -= sizeof(struct short_ad); |
48d6d8ff | 591 | else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
5ca4e4be | 592 | last_pos->offset -= sizeof(struct long_ad); |
31170b6a | 593 | else |
7e49b6f2 | 594 | return -EIO; |
28de7948 | 595 | |
31170b6a JK |
596 | return count; |
597 | } | |
598 | ||
7e49b6f2 JK |
599 | static int udf_extend_file(struct inode *inode, loff_t newsize) |
600 | { | |
601 | ||
602 | struct extent_position epos; | |
603 | struct kernel_lb_addr eloc; | |
604 | uint32_t elen; | |
605 | int8_t etype; | |
606 | struct super_block *sb = inode->i_sb; | |
607 | sector_t first_block = newsize >> sb->s_blocksize_bits, offset; | |
608 | int adsize; | |
609 | struct udf_inode_info *iinfo = UDF_I(inode); | |
610 | struct kernel_long_ad extent; | |
611 | int err; | |
612 | ||
613 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) | |
614 | adsize = sizeof(struct short_ad); | |
615 | else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) | |
616 | adsize = sizeof(struct long_ad); | |
617 | else | |
618 | BUG(); | |
619 | ||
620 | etype = inode_bmap(inode, first_block, &epos, &eloc, &elen, &offset); | |
621 | ||
622 | /* File has extent covering the new size (could happen when extending | |
623 | * inside a block)? */ | |
624 | if (etype != -1) | |
625 | return 0; | |
626 | if (newsize & (sb->s_blocksize - 1)) | |
627 | offset++; | |
628 | /* Extended file just to the boundary of the last file block? */ | |
629 | if (offset == 0) | |
630 | return 0; | |
631 | ||
632 | /* Truncate is extending the file by 'offset' blocks */ | |
633 | if ((!epos.bh && epos.offset == udf_file_entry_alloc_offset(inode)) || | |
634 | (epos.bh && epos.offset == sizeof(struct allocExtDesc))) { | |
635 | /* File has no extents at all or has empty last | |
636 | * indirect extent! Create a fake extent... */ | |
637 | extent.extLocation.logicalBlockNum = 0; | |
638 | extent.extLocation.partitionReferenceNum = 0; | |
639 | extent.extLength = EXT_NOT_RECORDED_NOT_ALLOCATED; | |
640 | } else { | |
641 | epos.offset -= adsize; | |
642 | etype = udf_next_aext(inode, &epos, &extent.extLocation, | |
643 | &extent.extLength, 0); | |
644 | extent.extLength |= etype << 30; | |
645 | } | |
646 | err = udf_do_extend_file(inode, &epos, &extent, offset); | |
647 | if (err < 0) | |
648 | goto out; | |
649 | err = 0; | |
650 | iinfo->i_lenExtents = newsize; | |
651 | out: | |
652 | brelse(epos.bh); | |
653 | return err; | |
654 | } | |
655 | ||
7b0b0933 JK |
656 | static sector_t inode_getblk(struct inode *inode, sector_t block, |
657 | int *err, int *new) | |
1da177e4 | 658 | { |
5ca4e4be | 659 | struct kernel_long_ad laarr[EXTENT_MERGE_SIZE]; |
ff116fc8 | 660 | struct extent_position prev_epos, cur_epos, next_epos; |
1da177e4 | 661 | int count = 0, startnum = 0, endnum = 0; |
85d71244 | 662 | uint32_t elen = 0, tmpelen; |
5ca4e4be | 663 | struct kernel_lb_addr eloc, tmpeloc; |
1da177e4 | 664 | int c = 1; |
60448b1d JK |
665 | loff_t lbcount = 0, b_off = 0; |
666 | uint32_t newblocknum, newblock; | |
667 | sector_t offset = 0; | |
1da177e4 | 668 | int8_t etype; |
48d6d8ff MS |
669 | struct udf_inode_info *iinfo = UDF_I(inode); |
670 | int goal = 0, pgoal = iinfo->i_location.logicalBlockNum; | |
31170b6a | 671 | int lastblock = 0; |
fb719c59 | 672 | bool isBeyondEOF; |
1da177e4 | 673 | |
7b0b0933 JK |
674 | *err = 0; |
675 | *new = 0; | |
ff116fc8 | 676 | prev_epos.offset = udf_file_entry_alloc_offset(inode); |
48d6d8ff | 677 | prev_epos.block = iinfo->i_location; |
ff116fc8 JK |
678 | prev_epos.bh = NULL; |
679 | cur_epos = next_epos = prev_epos; | |
28de7948 | 680 | b_off = (loff_t)block << inode->i_sb->s_blocksize_bits; |
1da177e4 LT |
681 | |
682 | /* find the extent which contains the block we are looking for. | |
cb00ea35 CG |
683 | alternate between laarr[0] and laarr[1] for locations of the |
684 | current extent, and the previous extent */ | |
685 | do { | |
686 | if (prev_epos.bh != cur_epos.bh) { | |
3bf25cb4 JK |
687 | brelse(prev_epos.bh); |
688 | get_bh(cur_epos.bh); | |
ff116fc8 | 689 | prev_epos.bh = cur_epos.bh; |
1da177e4 | 690 | } |
cb00ea35 | 691 | if (cur_epos.bh != next_epos.bh) { |
3bf25cb4 JK |
692 | brelse(cur_epos.bh); |
693 | get_bh(next_epos.bh); | |
ff116fc8 | 694 | cur_epos.bh = next_epos.bh; |
1da177e4 LT |
695 | } |
696 | ||
697 | lbcount += elen; | |
698 | ||
ff116fc8 JK |
699 | prev_epos.block = cur_epos.block; |
700 | cur_epos.block = next_epos.block; | |
1da177e4 | 701 | |
ff116fc8 JK |
702 | prev_epos.offset = cur_epos.offset; |
703 | cur_epos.offset = next_epos.offset; | |
1da177e4 | 704 | |
4b11111a MS |
705 | etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 1); |
706 | if (etype == -1) | |
1da177e4 LT |
707 | break; |
708 | ||
709 | c = !c; | |
710 | ||
711 | laarr[c].extLength = (etype << 30) | elen; | |
712 | laarr[c].extLocation = eloc; | |
713 | ||
714 | if (etype != (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) | |
715 | pgoal = eloc.logicalBlockNum + | |
28de7948 CG |
716 | ((elen + inode->i_sb->s_blocksize - 1) >> |
717 | inode->i_sb->s_blocksize_bits); | |
1da177e4 | 718 | |
cb00ea35 | 719 | count++; |
1da177e4 LT |
720 | } while (lbcount + elen <= b_off); |
721 | ||
722 | b_off -= lbcount; | |
723 | offset = b_off >> inode->i_sb->s_blocksize_bits; | |
85d71244 JK |
724 | /* |
725 | * Move prev_epos and cur_epos into indirect extent if we are at | |
726 | * the pointer to it | |
727 | */ | |
728 | udf_next_aext(inode, &prev_epos, &tmpeloc, &tmpelen, 0); | |
729 | udf_next_aext(inode, &cur_epos, &tmpeloc, &tmpelen, 0); | |
1da177e4 LT |
730 | |
731 | /* if the extent is allocated and recorded, return the block | |
cb00ea35 | 732 | if the extent is not a multiple of the blocksize, round up */ |
1da177e4 | 733 | |
cb00ea35 CG |
734 | if (etype == (EXT_RECORDED_ALLOCATED >> 30)) { |
735 | if (elen & (inode->i_sb->s_blocksize - 1)) { | |
1da177e4 | 736 | elen = EXT_RECORDED_ALLOCATED | |
28de7948 CG |
737 | ((elen + inode->i_sb->s_blocksize - 1) & |
738 | ~(inode->i_sb->s_blocksize - 1)); | |
7e49b6f2 | 739 | udf_write_aext(inode, &cur_epos, &eloc, elen, 1); |
1da177e4 | 740 | } |
3bf25cb4 JK |
741 | brelse(prev_epos.bh); |
742 | brelse(cur_epos.bh); | |
743 | brelse(next_epos.bh); | |
97e961fd | 744 | newblock = udf_get_lb_pblock(inode->i_sb, &eloc, offset); |
7b0b0933 | 745 | return newblock; |
1da177e4 LT |
746 | } |
747 | ||
31170b6a | 748 | /* Are we beyond EOF? */ |
cb00ea35 | 749 | if (etype == -1) { |
31170b6a | 750 | int ret; |
6981498d | 751 | isBeyondEOF = true; |
31170b6a JK |
752 | if (count) { |
753 | if (c) | |
754 | laarr[0] = laarr[1]; | |
755 | startnum = 1; | |
cb00ea35 | 756 | } else { |
31170b6a | 757 | /* Create a fake extent when there's not one */ |
4b11111a | 758 | memset(&laarr[0].extLocation, 0x00, |
5ca4e4be | 759 | sizeof(struct kernel_lb_addr)); |
31170b6a | 760 | laarr[0].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED; |
7e49b6f2 | 761 | /* Will udf_do_extend_file() create real extent from |
4b11111a | 762 | a fake one? */ |
31170b6a JK |
763 | startnum = (offset > 0); |
764 | } | |
765 | /* Create extents for the hole between EOF and offset */ | |
7e49b6f2 JK |
766 | ret = udf_do_extend_file(inode, &prev_epos, laarr, offset); |
767 | if (ret < 0) { | |
31170b6a JK |
768 | brelse(prev_epos.bh); |
769 | brelse(cur_epos.bh); | |
770 | brelse(next_epos.bh); | |
7e49b6f2 | 771 | *err = ret; |
7b0b0933 | 772 | return 0; |
31170b6a JK |
773 | } |
774 | c = 0; | |
775 | offset = 0; | |
776 | count += ret; | |
777 | /* We are not covered by a preallocated extent? */ | |
4b11111a MS |
778 | if ((laarr[0].extLength & UDF_EXTENT_FLAG_MASK) != |
779 | EXT_NOT_RECORDED_ALLOCATED) { | |
31170b6a JK |
780 | /* Is there any real extent? - otherwise we overwrite |
781 | * the fake one... */ | |
782 | if (count) | |
783 | c = !c; | |
784 | laarr[c].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | | |
28de7948 | 785 | inode->i_sb->s_blocksize; |
4b11111a | 786 | memset(&laarr[c].extLocation, 0x00, |
5ca4e4be | 787 | sizeof(struct kernel_lb_addr)); |
cb00ea35 | 788 | count++; |
31170b6a | 789 | } |
cb00ea35 | 790 | endnum = c + 1; |
1da177e4 | 791 | lastblock = 1; |
cb00ea35 | 792 | } else { |
6981498d | 793 | isBeyondEOF = false; |
1da177e4 LT |
794 | endnum = startnum = ((count > 2) ? 2 : count); |
795 | ||
4b11111a MS |
796 | /* if the current extent is in position 0, |
797 | swap it with the previous */ | |
cb00ea35 | 798 | if (!c && count != 1) { |
31170b6a JK |
799 | laarr[2] = laarr[0]; |
800 | laarr[0] = laarr[1]; | |
801 | laarr[1] = laarr[2]; | |
802 | c = 1; | |
803 | } | |
1da177e4 | 804 | |
4b11111a MS |
805 | /* if the current block is located in an extent, |
806 | read the next extent */ | |
807 | etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 0); | |
808 | if (etype != -1) { | |
cb00ea35 CG |
809 | laarr[c + 1].extLength = (etype << 30) | elen; |
810 | laarr[c + 1].extLocation = eloc; | |
811 | count++; | |
812 | startnum++; | |
813 | endnum++; | |
4b11111a | 814 | } else |
1da177e4 LT |
815 | lastblock = 1; |
816 | } | |
1da177e4 LT |
817 | |
818 | /* if the current extent is not recorded but allocated, get the | |
28de7948 | 819 | * block in the extent corresponding to the requested block */ |
4b11111a | 820 | if ((laarr[c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30)) |
1da177e4 | 821 | newblocknum = laarr[c].extLocation.logicalBlockNum + offset; |
4b11111a | 822 | else { /* otherwise, allocate a new block */ |
48d6d8ff MS |
823 | if (iinfo->i_next_alloc_block == block) |
824 | goal = iinfo->i_next_alloc_goal; | |
1da177e4 | 825 | |
cb00ea35 | 826 | if (!goal) { |
4b11111a | 827 | if (!(goal = pgoal)) /* XXX: what was intended here? */ |
48d6d8ff | 828 | goal = iinfo->i_location.logicalBlockNum + 1; |
1da177e4 LT |
829 | } |
830 | ||
4b11111a | 831 | newblocknum = udf_new_block(inode->i_sb, inode, |
48d6d8ff | 832 | iinfo->i_location.partitionReferenceNum, |
4b11111a MS |
833 | goal, err); |
834 | if (!newblocknum) { | |
3bf25cb4 | 835 | brelse(prev_epos.bh); |
2fb7d99d NJ |
836 | brelse(cur_epos.bh); |
837 | brelse(next_epos.bh); | |
1da177e4 | 838 | *err = -ENOSPC; |
7b0b0933 | 839 | return 0; |
1da177e4 | 840 | } |
fb719c59 NJ |
841 | if (isBeyondEOF) |
842 | iinfo->i_lenExtents += inode->i_sb->s_blocksize; | |
1da177e4 LT |
843 | } |
844 | ||
4b11111a MS |
845 | /* if the extent the requsted block is located in contains multiple |
846 | * blocks, split the extent into at most three extents. blocks prior | |
847 | * to requested block, requested block, and blocks after requested | |
848 | * block */ | |
1da177e4 LT |
849 | udf_split_extents(inode, &c, offset, newblocknum, laarr, &endnum); |
850 | ||
851 | #ifdef UDF_PREALLOCATE | |
81056dd0 JK |
852 | /* We preallocate blocks only for regular files. It also makes sense |
853 | * for directories but there's a problem when to drop the | |
854 | * preallocation. We might use some delayed work for that but I feel | |
855 | * it's overengineering for a filesystem like UDF. */ | |
856 | if (S_ISREG(inode->i_mode)) | |
857 | udf_prealloc_extents(inode, c, lastblock, laarr, &endnum); | |
1da177e4 LT |
858 | #endif |
859 | ||
860 | /* merge any continuous blocks in laarr */ | |
861 | udf_merge_extents(inode, laarr, &endnum); | |
862 | ||
863 | /* write back the new extents, inserting new extents if the new number | |
28de7948 CG |
864 | * of extents is greater than the old number, and deleting extents if |
865 | * the new number of extents is less than the old number */ | |
ff116fc8 | 866 | udf_update_extents(inode, laarr, startnum, endnum, &prev_epos); |
1da177e4 | 867 | |
3bf25cb4 | 868 | brelse(prev_epos.bh); |
2fb7d99d NJ |
869 | brelse(cur_epos.bh); |
870 | brelse(next_epos.bh); | |
1da177e4 | 871 | |
4b11111a | 872 | newblock = udf_get_pblock(inode->i_sb, newblocknum, |
48d6d8ff | 873 | iinfo->i_location.partitionReferenceNum, 0); |
7b0b0933 JK |
874 | if (!newblock) { |
875 | *err = -EIO; | |
876 | return 0; | |
877 | } | |
1da177e4 | 878 | *new = 1; |
48d6d8ff MS |
879 | iinfo->i_next_alloc_block = block; |
880 | iinfo->i_next_alloc_goal = newblocknum; | |
1da177e4 LT |
881 | inode->i_ctime = current_fs_time(inode->i_sb); |
882 | ||
883 | if (IS_SYNC(inode)) | |
884 | udf_sync_inode(inode); | |
885 | else | |
886 | mark_inode_dirty(inode); | |
28de7948 | 887 | |
7b0b0933 | 888 | return newblock; |
1da177e4 LT |
889 | } |
890 | ||
cb00ea35 CG |
891 | static void udf_split_extents(struct inode *inode, int *c, int offset, |
892 | int newblocknum, | |
5ca4e4be | 893 | struct kernel_long_ad laarr[EXTENT_MERGE_SIZE], |
cb00ea35 | 894 | int *endnum) |
1da177e4 | 895 | { |
4b11111a MS |
896 | unsigned long blocksize = inode->i_sb->s_blocksize; |
897 | unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; | |
898 | ||
1da177e4 | 899 | if ((laarr[*c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30) || |
4b11111a MS |
900 | (laarr[*c].extLength >> 30) == |
901 | (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) { | |
1da177e4 LT |
902 | int curr = *c; |
903 | int blen = ((laarr[curr].extLength & UDF_EXTENT_LENGTH_MASK) + | |
4b11111a | 904 | blocksize - 1) >> blocksize_bits; |
1da177e4 LT |
905 | int8_t etype = (laarr[curr].extLength >> 30); |
906 | ||
4b11111a | 907 | if (blen == 1) |
28de7948 | 908 | ; |
4b11111a | 909 | else if (!offset || blen == offset + 1) { |
cb00ea35 CG |
910 | laarr[curr + 2] = laarr[curr + 1]; |
911 | laarr[curr + 1] = laarr[curr]; | |
912 | } else { | |
913 | laarr[curr + 3] = laarr[curr + 1]; | |
914 | laarr[curr + 2] = laarr[curr + 1] = laarr[curr]; | |
915 | } | |
916 | ||
917 | if (offset) { | |
918 | if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30)) { | |
4b11111a | 919 | udf_free_blocks(inode->i_sb, inode, |
97e961fd | 920 | &laarr[curr].extLocation, |
4b11111a MS |
921 | 0, offset); |
922 | laarr[curr].extLength = | |
923 | EXT_NOT_RECORDED_NOT_ALLOCATED | | |
924 | (offset << blocksize_bits); | |
1da177e4 | 925 | laarr[curr].extLocation.logicalBlockNum = 0; |
4b11111a MS |
926 | laarr[curr].extLocation. |
927 | partitionReferenceNum = 0; | |
928 | } else | |
1da177e4 | 929 | laarr[curr].extLength = (etype << 30) | |
4b11111a | 930 | (offset << blocksize_bits); |
cb00ea35 CG |
931 | curr++; |
932 | (*c)++; | |
933 | (*endnum)++; | |
1da177e4 | 934 | } |
647bd61a | 935 | |
1da177e4 LT |
936 | laarr[curr].extLocation.logicalBlockNum = newblocknum; |
937 | if (etype == (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) | |
938 | laarr[curr].extLocation.partitionReferenceNum = | |
c0b34438 | 939 | UDF_I(inode)->i_location.partitionReferenceNum; |
1da177e4 | 940 | laarr[curr].extLength = EXT_RECORDED_ALLOCATED | |
4b11111a | 941 | blocksize; |
cb00ea35 | 942 | curr++; |
1da177e4 | 943 | |
cb00ea35 | 944 | if (blen != offset + 1) { |
1da177e4 | 945 | if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30)) |
4b11111a MS |
946 | laarr[curr].extLocation.logicalBlockNum += |
947 | offset + 1; | |
28de7948 | 948 | laarr[curr].extLength = (etype << 30) | |
4b11111a | 949 | ((blen - (offset + 1)) << blocksize_bits); |
cb00ea35 CG |
950 | curr++; |
951 | (*endnum)++; | |
1da177e4 LT |
952 | } |
953 | } | |
954 | } | |
955 | ||
956 | static void udf_prealloc_extents(struct inode *inode, int c, int lastblock, | |
5ca4e4be | 957 | struct kernel_long_ad laarr[EXTENT_MERGE_SIZE], |
cb00ea35 | 958 | int *endnum) |
1da177e4 LT |
959 | { |
960 | int start, length = 0, currlength = 0, i; | |
961 | ||
cb00ea35 | 962 | if (*endnum >= (c + 1)) { |
1da177e4 LT |
963 | if (!lastblock) |
964 | return; | |
965 | else | |
966 | start = c; | |
cb00ea35 | 967 | } else { |
4b11111a MS |
968 | if ((laarr[c + 1].extLength >> 30) == |
969 | (EXT_NOT_RECORDED_ALLOCATED >> 30)) { | |
cb00ea35 | 970 | start = c + 1; |
4b11111a MS |
971 | length = currlength = |
972 | (((laarr[c + 1].extLength & | |
973 | UDF_EXTENT_LENGTH_MASK) + | |
974 | inode->i_sb->s_blocksize - 1) >> | |
975 | inode->i_sb->s_blocksize_bits); | |
976 | } else | |
1da177e4 LT |
977 | start = c; |
978 | } | |
979 | ||
cb00ea35 CG |
980 | for (i = start + 1; i <= *endnum; i++) { |
981 | if (i == *endnum) { | |
1da177e4 LT |
982 | if (lastblock) |
983 | length += UDF_DEFAULT_PREALLOC_BLOCKS; | |
4b11111a MS |
984 | } else if ((laarr[i].extLength >> 30) == |
985 | (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) { | |
986 | length += (((laarr[i].extLength & | |
987 | UDF_EXTENT_LENGTH_MASK) + | |
988 | inode->i_sb->s_blocksize - 1) >> | |
989 | inode->i_sb->s_blocksize_bits); | |
990 | } else | |
1da177e4 LT |
991 | break; |
992 | } | |
993 | ||
cb00ea35 | 994 | if (length) { |
1da177e4 | 995 | int next = laarr[start].extLocation.logicalBlockNum + |
28de7948 | 996 | (((laarr[start].extLength & UDF_EXTENT_LENGTH_MASK) + |
4b11111a MS |
997 | inode->i_sb->s_blocksize - 1) >> |
998 | inode->i_sb->s_blocksize_bits); | |
1da177e4 | 999 | int numalloc = udf_prealloc_blocks(inode->i_sb, inode, |
4b11111a MS |
1000 | laarr[start].extLocation.partitionReferenceNum, |
1001 | next, (UDF_DEFAULT_PREALLOC_BLOCKS > length ? | |
1002 | length : UDF_DEFAULT_PREALLOC_BLOCKS) - | |
1003 | currlength); | |
28de7948 | 1004 | if (numalloc) { |
4b11111a | 1005 | if (start == (c + 1)) |
1da177e4 | 1006 | laarr[start].extLength += |
4b11111a MS |
1007 | (numalloc << |
1008 | inode->i_sb->s_blocksize_bits); | |
1009 | else { | |
cb00ea35 | 1010 | memmove(&laarr[c + 2], &laarr[c + 1], |
5ca4e4be | 1011 | sizeof(struct long_ad) * (*endnum - (c + 1))); |
cb00ea35 CG |
1012 | (*endnum)++; |
1013 | laarr[c + 1].extLocation.logicalBlockNum = next; | |
1014 | laarr[c + 1].extLocation.partitionReferenceNum = | |
4b11111a MS |
1015 | laarr[c].extLocation. |
1016 | partitionReferenceNum; | |
1017 | laarr[c + 1].extLength = | |
1018 | EXT_NOT_RECORDED_ALLOCATED | | |
1019 | (numalloc << | |
1020 | inode->i_sb->s_blocksize_bits); | |
cb00ea35 | 1021 | start = c + 1; |
1da177e4 LT |
1022 | } |
1023 | ||
cb00ea35 | 1024 | for (i = start + 1; numalloc && i < *endnum; i++) { |
4b11111a MS |
1025 | int elen = ((laarr[i].extLength & |
1026 | UDF_EXTENT_LENGTH_MASK) + | |
1027 | inode->i_sb->s_blocksize - 1) >> | |
1028 | inode->i_sb->s_blocksize_bits; | |
1da177e4 | 1029 | |
cb00ea35 | 1030 | if (elen > numalloc) { |
1da177e4 | 1031 | laarr[i].extLength -= |
4b11111a MS |
1032 | (numalloc << |
1033 | inode->i_sb->s_blocksize_bits); | |
1da177e4 | 1034 | numalloc = 0; |
cb00ea35 | 1035 | } else { |
1da177e4 | 1036 | numalloc -= elen; |
cb00ea35 | 1037 | if (*endnum > (i + 1)) |
4b11111a MS |
1038 | memmove(&laarr[i], |
1039 | &laarr[i + 1], | |
5ca4e4be | 1040 | sizeof(struct long_ad) * |
4b11111a | 1041 | (*endnum - (i + 1))); |
cb00ea35 CG |
1042 | i--; |
1043 | (*endnum)--; | |
1da177e4 LT |
1044 | } |
1045 | } | |
c0b34438 | 1046 | UDF_I(inode)->i_lenExtents += |
4b11111a | 1047 | numalloc << inode->i_sb->s_blocksize_bits; |
1da177e4 LT |
1048 | } |
1049 | } | |
1050 | } | |
1051 | ||
1052 | static void udf_merge_extents(struct inode *inode, | |
5ca4e4be | 1053 | struct kernel_long_ad laarr[EXTENT_MERGE_SIZE], |
cb00ea35 | 1054 | int *endnum) |
1da177e4 LT |
1055 | { |
1056 | int i; | |
4b11111a MS |
1057 | unsigned long blocksize = inode->i_sb->s_blocksize; |
1058 | unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; | |
1da177e4 | 1059 | |
cb00ea35 | 1060 | for (i = 0; i < (*endnum - 1); i++) { |
5ca4e4be PE |
1061 | struct kernel_long_ad *li /*l[i]*/ = &laarr[i]; |
1062 | struct kernel_long_ad *lip1 /*l[i plus 1]*/ = &laarr[i + 1]; | |
4b11111a MS |
1063 | |
1064 | if (((li->extLength >> 30) == (lip1->extLength >> 30)) && | |
1065 | (((li->extLength >> 30) == | |
1066 | (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) || | |
1067 | ((lip1->extLocation.logicalBlockNum - | |
1068 | li->extLocation.logicalBlockNum) == | |
1069 | (((li->extLength & UDF_EXTENT_LENGTH_MASK) + | |
1070 | blocksize - 1) >> blocksize_bits)))) { | |
1071 | ||
1072 | if (((li->extLength & UDF_EXTENT_LENGTH_MASK) + | |
1073 | (lip1->extLength & UDF_EXTENT_LENGTH_MASK) + | |
1074 | blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) { | |
1075 | lip1->extLength = (lip1->extLength - | |
1076 | (li->extLength & | |
1077 | UDF_EXTENT_LENGTH_MASK) + | |
1078 | UDF_EXTENT_LENGTH_MASK) & | |
1079 | ~(blocksize - 1); | |
1080 | li->extLength = (li->extLength & | |
1081 | UDF_EXTENT_FLAG_MASK) + | |
1082 | (UDF_EXTENT_LENGTH_MASK + 1) - | |
1083 | blocksize; | |
1084 | lip1->extLocation.logicalBlockNum = | |
1085 | li->extLocation.logicalBlockNum + | |
1086 | ((li->extLength & | |
1087 | UDF_EXTENT_LENGTH_MASK) >> | |
1088 | blocksize_bits); | |
1089 | } else { | |
1090 | li->extLength = lip1->extLength + | |
1091 | (((li->extLength & | |
1092 | UDF_EXTENT_LENGTH_MASK) + | |
1093 | blocksize - 1) & ~(blocksize - 1)); | |
1094 | if (*endnum > (i + 2)) | |
1095 | memmove(&laarr[i + 1], &laarr[i + 2], | |
5ca4e4be | 1096 | sizeof(struct long_ad) * |
4b11111a MS |
1097 | (*endnum - (i + 2))); |
1098 | i--; | |
1099 | (*endnum)--; | |
1da177e4 | 1100 | } |
4b11111a MS |
1101 | } else if (((li->extLength >> 30) == |
1102 | (EXT_NOT_RECORDED_ALLOCATED >> 30)) && | |
1103 | ((lip1->extLength >> 30) == | |
1104 | (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))) { | |
97e961fd | 1105 | udf_free_blocks(inode->i_sb, inode, &li->extLocation, 0, |
4b11111a MS |
1106 | ((li->extLength & |
1107 | UDF_EXTENT_LENGTH_MASK) + | |
1108 | blocksize - 1) >> blocksize_bits); | |
1109 | li->extLocation.logicalBlockNum = 0; | |
1110 | li->extLocation.partitionReferenceNum = 0; | |
1111 | ||
1112 | if (((li->extLength & UDF_EXTENT_LENGTH_MASK) + | |
1113 | (lip1->extLength & UDF_EXTENT_LENGTH_MASK) + | |
1114 | blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) { | |
1115 | lip1->extLength = (lip1->extLength - | |
1116 | (li->extLength & | |
1117 | UDF_EXTENT_LENGTH_MASK) + | |
1118 | UDF_EXTENT_LENGTH_MASK) & | |
1119 | ~(blocksize - 1); | |
1120 | li->extLength = (li->extLength & | |
1121 | UDF_EXTENT_FLAG_MASK) + | |
1122 | (UDF_EXTENT_LENGTH_MASK + 1) - | |
1123 | blocksize; | |
cb00ea35 | 1124 | } else { |
4b11111a MS |
1125 | li->extLength = lip1->extLength + |
1126 | (((li->extLength & | |
1127 | UDF_EXTENT_LENGTH_MASK) + | |
1128 | blocksize - 1) & ~(blocksize - 1)); | |
cb00ea35 CG |
1129 | if (*endnum > (i + 2)) |
1130 | memmove(&laarr[i + 1], &laarr[i + 2], | |
5ca4e4be | 1131 | sizeof(struct long_ad) * |
4b11111a | 1132 | (*endnum - (i + 2))); |
cb00ea35 CG |
1133 | i--; |
1134 | (*endnum)--; | |
1da177e4 | 1135 | } |
4b11111a MS |
1136 | } else if ((li->extLength >> 30) == |
1137 | (EXT_NOT_RECORDED_ALLOCATED >> 30)) { | |
1138 | udf_free_blocks(inode->i_sb, inode, | |
97e961fd | 1139 | &li->extLocation, 0, |
4b11111a MS |
1140 | ((li->extLength & |
1141 | UDF_EXTENT_LENGTH_MASK) + | |
1142 | blocksize - 1) >> blocksize_bits); | |
1143 | li->extLocation.logicalBlockNum = 0; | |
1144 | li->extLocation.partitionReferenceNum = 0; | |
1145 | li->extLength = (li->extLength & | |
1146 | UDF_EXTENT_LENGTH_MASK) | | |
1147 | EXT_NOT_RECORDED_NOT_ALLOCATED; | |
1da177e4 LT |
1148 | } |
1149 | } | |
1150 | } | |
1151 | ||
1152 | static void udf_update_extents(struct inode *inode, | |
5ca4e4be | 1153 | struct kernel_long_ad laarr[EXTENT_MERGE_SIZE], |
cb00ea35 CG |
1154 | int startnum, int endnum, |
1155 | struct extent_position *epos) | |
1da177e4 LT |
1156 | { |
1157 | int start = 0, i; | |
5ca4e4be | 1158 | struct kernel_lb_addr tmploc; |
1da177e4 LT |
1159 | uint32_t tmplen; |
1160 | ||
cb00ea35 CG |
1161 | if (startnum > endnum) { |
1162 | for (i = 0; i < (startnum - endnum); i++) | |
ff116fc8 | 1163 | udf_delete_aext(inode, *epos, laarr[i].extLocation, |
cb00ea35 CG |
1164 | laarr[i].extLength); |
1165 | } else if (startnum < endnum) { | |
1166 | for (i = 0; i < (endnum - startnum); i++) { | |
ff116fc8 | 1167 | udf_insert_aext(inode, *epos, laarr[i].extLocation, |
cb00ea35 | 1168 | laarr[i].extLength); |
ff116fc8 | 1169 | udf_next_aext(inode, epos, &laarr[i].extLocation, |
cb00ea35 CG |
1170 | &laarr[i].extLength, 1); |
1171 | start++; | |
1da177e4 LT |
1172 | } |
1173 | } | |
1174 | ||
cb00ea35 | 1175 | for (i = start; i < endnum; i++) { |
ff116fc8 | 1176 | udf_next_aext(inode, epos, &tmploc, &tmplen, 0); |
97e961fd | 1177 | udf_write_aext(inode, epos, &laarr[i].extLocation, |
cb00ea35 | 1178 | laarr[i].extLength, 1); |
1da177e4 LT |
1179 | } |
1180 | } | |
1181 | ||
cb00ea35 CG |
1182 | struct buffer_head *udf_bread(struct inode *inode, int block, |
1183 | int create, int *err) | |
1da177e4 | 1184 | { |
cb00ea35 | 1185 | struct buffer_head *bh = NULL; |
1da177e4 LT |
1186 | |
1187 | bh = udf_getblk(inode, block, create, err); | |
1188 | if (!bh) | |
1189 | return NULL; | |
1190 | ||
1191 | if (buffer_uptodate(bh)) | |
1192 | return bh; | |
28de7948 | 1193 | |
1da177e4 | 1194 | ll_rw_block(READ, 1, &bh); |
28de7948 | 1195 | |
1da177e4 LT |
1196 | wait_on_buffer(bh); |
1197 | if (buffer_uptodate(bh)) | |
1198 | return bh; | |
28de7948 | 1199 | |
1da177e4 LT |
1200 | brelse(bh); |
1201 | *err = -EIO; | |
1202 | return NULL; | |
1203 | } | |
1204 | ||
7e49b6f2 | 1205 | int udf_setsize(struct inode *inode, loff_t newsize) |
1da177e4 | 1206 | { |
1da177e4 | 1207 | int err; |
48d6d8ff | 1208 | struct udf_inode_info *iinfo; |
04447026 | 1209 | int bsize = i_blocksize(inode); |
1da177e4 LT |
1210 | |
1211 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || | |
cb00ea35 | 1212 | S_ISLNK(inode->i_mode))) |
7e49b6f2 | 1213 | return -EINVAL; |
1da177e4 | 1214 | if (IS_APPEND(inode) || IS_IMMUTABLE(inode)) |
7e49b6f2 | 1215 | return -EPERM; |
1da177e4 | 1216 | |
48d6d8ff | 1217 | iinfo = UDF_I(inode); |
7e49b6f2 | 1218 | if (newsize > inode->i_size) { |
4d0fb621 | 1219 | down_write(&iinfo->i_data_sem); |
7e49b6f2 JK |
1220 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { |
1221 | if (bsize < | |
1222 | (udf_file_entry_alloc_offset(inode) + newsize)) { | |
1223 | err = udf_expand_file_adinicb(inode); | |
d2eb8c35 | 1224 | if (err) |
7e49b6f2 | 1225 | return err; |
d2eb8c35 | 1226 | down_write(&iinfo->i_data_sem); |
bb2b6d19 | 1227 | } else { |
7e49b6f2 | 1228 | iinfo->i_lenAlloc = newsize; |
bb2b6d19 IA |
1229 | goto set_size; |
1230 | } | |
7e49b6f2 JK |
1231 | } |
1232 | err = udf_extend_file(inode, newsize); | |
1233 | if (err) { | |
1234 | up_write(&iinfo->i_data_sem); | |
1235 | return err; | |
1da177e4 | 1236 | } |
bb2b6d19 | 1237 | set_size: |
4d0fb621 | 1238 | up_write(&iinfo->i_data_sem); |
f57b4ae0 | 1239 | truncate_setsize(inode, newsize); |
cb00ea35 | 1240 | } else { |
7e49b6f2 JK |
1241 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { |
1242 | down_write(&iinfo->i_data_sem); | |
99600051 | 1243 | udf_clear_extent_cache(inode); |
7e49b6f2 JK |
1244 | memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr + newsize, |
1245 | 0x00, bsize - newsize - | |
1246 | udf_file_entry_alloc_offset(inode)); | |
1247 | iinfo->i_lenAlloc = newsize; | |
1248 | truncate_setsize(inode, newsize); | |
1249 | up_write(&iinfo->i_data_sem); | |
1250 | goto update_time; | |
1251 | } | |
1252 | err = block_truncate_page(inode->i_mapping, newsize, | |
1253 | udf_get_block); | |
1254 | if (err) | |
1255 | return err; | |
f57b4ae0 | 1256 | truncate_setsize(inode, newsize); |
4d0fb621 | 1257 | down_write(&iinfo->i_data_sem); |
99600051 | 1258 | udf_clear_extent_cache(inode); |
1da177e4 | 1259 | udf_truncate_extents(inode); |
4d0fb621 | 1260 | up_write(&iinfo->i_data_sem); |
647bd61a | 1261 | } |
7e49b6f2 | 1262 | update_time: |
1da177e4 LT |
1263 | inode->i_mtime = inode->i_ctime = current_fs_time(inode->i_sb); |
1264 | if (IS_SYNC(inode)) | |
cb00ea35 | 1265 | udf_sync_inode(inode); |
1da177e4 LT |
1266 | else |
1267 | mark_inode_dirty(inode); | |
7e49b6f2 | 1268 | return 0; |
1da177e4 LT |
1269 | } |
1270 | ||
c03aa9f6 JK |
1271 | /* |
1272 | * Maximum length of linked list formed by ICB hierarchy. The chosen number is | |
1273 | * arbitrary - just that we hopefully don't limit any real use of rewritten | |
1274 | * inode on write-once media but avoid looping for too long on corrupted media. | |
1275 | */ | |
1276 | #define UDF_MAX_ICB_NESTING 1024 | |
1277 | ||
6174c2eb | 1278 | static int udf_read_inode(struct inode *inode, bool hidden_inode) |
1da177e4 LT |
1279 | { |
1280 | struct buffer_head *bh = NULL; | |
1281 | struct fileEntry *fe; | |
bb7720a0 | 1282 | struct extendedFileEntry *efe; |
1da177e4 | 1283 | uint16_t ident; |
48d6d8ff | 1284 | struct udf_inode_info *iinfo = UDF_I(inode); |
bb7720a0 | 1285 | struct udf_sb_info *sbi = UDF_SB(inode->i_sb); |
6d3d5e86 | 1286 | struct kernel_lb_addr *iloc = &iinfo->i_location; |
bb7720a0 | 1287 | unsigned int link_count; |
c03aa9f6 | 1288 | unsigned int indirections = 0; |
79144954 | 1289 | int bs = inode->i_sb->s_blocksize; |
6d3d5e86 | 1290 | int ret = -EIO; |
1da177e4 | 1291 | |
c03aa9f6 | 1292 | reread: |
6d3d5e86 JK |
1293 | if (iloc->logicalBlockNum >= |
1294 | sbi->s_partmaps[iloc->partitionReferenceNum].s_partition_len) { | |
1295 | udf_debug("block=%d, partition=%d out of range\n", | |
1296 | iloc->logicalBlockNum, iloc->partitionReferenceNum); | |
1297 | return -EIO; | |
1298 | } | |
1299 | ||
1da177e4 LT |
1300 | /* |
1301 | * Set defaults, but the inode is still incomplete! | |
1302 | * Note: get_new_inode() sets the following on a new inode: | |
1303 | * i_sb = sb | |
1304 | * i_no = ino | |
1305 | * i_flags = sb->s_flags | |
1306 | * i_state = 0 | |
1307 | * clean_inode(): zero fills and sets | |
1308 | * i_count = 1 | |
1309 | * i_nlink = 1 | |
1310 | * i_op = NULL; | |
1311 | */ | |
6d3d5e86 | 1312 | bh = udf_read_ptagged(inode->i_sb, iloc, 0, &ident); |
cb00ea35 | 1313 | if (!bh) { |
78ace70c | 1314 | udf_err(inode->i_sb, "(ino %ld) failed !bh\n", inode->i_ino); |
6d3d5e86 | 1315 | return -EIO; |
1da177e4 LT |
1316 | } |
1317 | ||
1318 | if (ident != TAG_IDENT_FE && ident != TAG_IDENT_EFE && | |
cb00ea35 | 1319 | ident != TAG_IDENT_USE) { |
78ace70c JP |
1320 | udf_err(inode->i_sb, "(ino %ld) failed ident=%d\n", |
1321 | inode->i_ino, ident); | |
6d3d5e86 | 1322 | goto out; |
1da177e4 LT |
1323 | } |
1324 | ||
1325 | fe = (struct fileEntry *)bh->b_data; | |
bb7720a0 | 1326 | efe = (struct extendedFileEntry *)bh->b_data; |
1da177e4 | 1327 | |
5e0f0017 | 1328 | if (fe->icbTag.strategyType == cpu_to_le16(4096)) { |
1ab92785 | 1329 | struct buffer_head *ibh; |
1da177e4 | 1330 | |
6d3d5e86 | 1331 | ibh = udf_read_ptagged(inode->i_sb, iloc, 1, &ident); |
1ab92785 | 1332 | if (ident == TAG_IDENT_IE && ibh) { |
5ca4e4be | 1333 | struct kernel_lb_addr loc; |
1ab92785 | 1334 | struct indirectEntry *ie; |
1335 | ||
1336 | ie = (struct indirectEntry *)ibh->b_data; | |
1337 | loc = lelb_to_cpu(ie->indirectICB.extLocation); | |
1338 | ||
c03aa9f6 | 1339 | if (ie->indirectICB.extLength) { |
c03aa9f6 JK |
1340 | brelse(ibh); |
1341 | memcpy(&iinfo->i_location, &loc, | |
1342 | sizeof(struct kernel_lb_addr)); | |
1343 | if (++indirections > UDF_MAX_ICB_NESTING) { | |
1344 | udf_err(inode->i_sb, | |
1345 | "too many ICBs in ICB hierarchy" | |
1346 | " (max %d supported)\n", | |
1347 | UDF_MAX_ICB_NESTING); | |
6d3d5e86 | 1348 | goto out; |
28de7948 | 1349 | } |
6d3d5e86 | 1350 | brelse(bh); |
c03aa9f6 | 1351 | goto reread; |
1da177e4 | 1352 | } |
28de7948 | 1353 | } |
1ab92785 | 1354 | brelse(ibh); |
5e0f0017 | 1355 | } else if (fe->icbTag.strategyType != cpu_to_le16(4)) { |
78ace70c JP |
1356 | udf_err(inode->i_sb, "unsupported strategy type: %d\n", |
1357 | le16_to_cpu(fe->icbTag.strategyType)); | |
6d3d5e86 | 1358 | goto out; |
1da177e4 | 1359 | } |
5e0f0017 | 1360 | if (fe->icbTag.strategyType == cpu_to_le16(4)) |
48d6d8ff | 1361 | iinfo->i_strat4096 = 0; |
5e0f0017 | 1362 | else /* if (fe->icbTag.strategyType == cpu_to_le16(4096)) */ |
48d6d8ff | 1363 | iinfo->i_strat4096 = 1; |
1da177e4 | 1364 | |
48d6d8ff | 1365 | iinfo->i_alloc_type = le16_to_cpu(fe->icbTag.flags) & |
4b11111a | 1366 | ICBTAG_FLAG_AD_MASK; |
48d6d8ff MS |
1367 | iinfo->i_unique = 0; |
1368 | iinfo->i_lenEAttr = 0; | |
1369 | iinfo->i_lenExtents = 0; | |
1370 | iinfo->i_lenAlloc = 0; | |
1371 | iinfo->i_next_alloc_block = 0; | |
1372 | iinfo->i_next_alloc_goal = 0; | |
5e0f0017 | 1373 | if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_EFE)) { |
48d6d8ff MS |
1374 | iinfo->i_efe = 1; |
1375 | iinfo->i_use = 0; | |
79144954 | 1376 | ret = udf_alloc_i_data(inode, bs - |
6d3d5e86 JK |
1377 | sizeof(struct extendedFileEntry)); |
1378 | if (ret) | |
1379 | goto out; | |
48d6d8ff | 1380 | memcpy(iinfo->i_ext.i_data, |
4b11111a | 1381 | bh->b_data + sizeof(struct extendedFileEntry), |
79144954 | 1382 | bs - sizeof(struct extendedFileEntry)); |
5e0f0017 | 1383 | } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_FE)) { |
48d6d8ff MS |
1384 | iinfo->i_efe = 0; |
1385 | iinfo->i_use = 0; | |
79144954 | 1386 | ret = udf_alloc_i_data(inode, bs - sizeof(struct fileEntry)); |
6d3d5e86 JK |
1387 | if (ret) |
1388 | goto out; | |
48d6d8ff | 1389 | memcpy(iinfo->i_ext.i_data, |
c0b34438 | 1390 | bh->b_data + sizeof(struct fileEntry), |
79144954 | 1391 | bs - sizeof(struct fileEntry)); |
5e0f0017 | 1392 | } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_USE)) { |
48d6d8ff MS |
1393 | iinfo->i_efe = 0; |
1394 | iinfo->i_use = 1; | |
1395 | iinfo->i_lenAlloc = le32_to_cpu( | |
4b11111a MS |
1396 | ((struct unallocSpaceEntry *)bh->b_data)-> |
1397 | lengthAllocDescs); | |
79144954 | 1398 | ret = udf_alloc_i_data(inode, bs - |
6d3d5e86 JK |
1399 | sizeof(struct unallocSpaceEntry)); |
1400 | if (ret) | |
1401 | goto out; | |
48d6d8ff | 1402 | memcpy(iinfo->i_ext.i_data, |
4b11111a | 1403 | bh->b_data + sizeof(struct unallocSpaceEntry), |
79144954 | 1404 | bs - sizeof(struct unallocSpaceEntry)); |
6d3d5e86 | 1405 | return 0; |
1da177e4 LT |
1406 | } |
1407 | ||
6d3d5e86 | 1408 | ret = -EIO; |
c03cad24 | 1409 | read_lock(&sbi->s_cred_lock); |
c2ba138a EB |
1410 | i_uid_write(inode, le32_to_cpu(fe->uid)); |
1411 | if (!uid_valid(inode->i_uid) || | |
ca76d2d8 CG |
1412 | UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_IGNORE) || |
1413 | UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_SET)) | |
4d6660eb | 1414 | inode->i_uid = UDF_SB(inode->i_sb)->s_uid; |
1da177e4 | 1415 | |
c2ba138a EB |
1416 | i_gid_write(inode, le32_to_cpu(fe->gid)); |
1417 | if (!gid_valid(inode->i_gid) || | |
ca76d2d8 CG |
1418 | UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_IGNORE) || |
1419 | UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_SET)) | |
4d6660eb | 1420 | inode->i_gid = UDF_SB(inode->i_sb)->s_gid; |
1da177e4 | 1421 | |
7ac9bcd5 | 1422 | if (fe->icbTag.fileType != ICBTAG_FILE_TYPE_DIRECTORY && |
87bc730c | 1423 | sbi->s_fmode != UDF_INVALID_MODE) |
7ac9bcd5 MS |
1424 | inode->i_mode = sbi->s_fmode; |
1425 | else if (fe->icbTag.fileType == ICBTAG_FILE_TYPE_DIRECTORY && | |
87bc730c | 1426 | sbi->s_dmode != UDF_INVALID_MODE) |
7ac9bcd5 MS |
1427 | inode->i_mode = sbi->s_dmode; |
1428 | else | |
1429 | inode->i_mode = udf_convert_permissions(fe); | |
1430 | inode->i_mode &= ~sbi->s_umask; | |
c03cad24 JK |
1431 | read_unlock(&sbi->s_cred_lock); |
1432 | ||
bfe86848 | 1433 | link_count = le16_to_cpu(fe->fileLinkCount); |
4071b913 | 1434 | if (!link_count) { |
6174c2eb JK |
1435 | if (!hidden_inode) { |
1436 | ret = -ESTALE; | |
1437 | goto out; | |
1438 | } | |
1439 | link_count = 1; | |
4071b913 | 1440 | } |
bfe86848 | 1441 | set_nlink(inode, link_count); |
c03cad24 JK |
1442 | |
1443 | inode->i_size = le64_to_cpu(fe->informationLength); | |
1444 | iinfo->i_lenExtents = inode->i_size; | |
1da177e4 | 1445 | |
48d6d8ff | 1446 | if (iinfo->i_efe == 0) { |
1da177e4 | 1447 | inode->i_blocks = le64_to_cpu(fe->logicalBlocksRecorded) << |
28de7948 | 1448 | (inode->i_sb->s_blocksize_bits - 9); |
1da177e4 | 1449 | |
56774805 | 1450 | if (!udf_disk_stamp_to_time(&inode->i_atime, fe->accessTime)) |
cbf5676a | 1451 | inode->i_atime = sbi->s_record_time; |
1452 | ||
56774805 MS |
1453 | if (!udf_disk_stamp_to_time(&inode->i_mtime, |
1454 | fe->modificationTime)) | |
cbf5676a | 1455 | inode->i_mtime = sbi->s_record_time; |
1456 | ||
56774805 | 1457 | if (!udf_disk_stamp_to_time(&inode->i_ctime, fe->attrTime)) |
cbf5676a | 1458 | inode->i_ctime = sbi->s_record_time; |
1da177e4 | 1459 | |
48d6d8ff MS |
1460 | iinfo->i_unique = le64_to_cpu(fe->uniqueID); |
1461 | iinfo->i_lenEAttr = le32_to_cpu(fe->lengthExtendedAttr); | |
1462 | iinfo->i_lenAlloc = le32_to_cpu(fe->lengthAllocDescs); | |
d5e2cf07 | 1463 | iinfo->i_checkpoint = le32_to_cpu(fe->checkpoint); |
cb00ea35 | 1464 | } else { |
647bd61a | 1465 | inode->i_blocks = le64_to_cpu(efe->logicalBlocksRecorded) << |
cb00ea35 | 1466 | (inode->i_sb->s_blocksize_bits - 9); |
1da177e4 | 1467 | |
56774805 | 1468 | if (!udf_disk_stamp_to_time(&inode->i_atime, efe->accessTime)) |
cbf5676a | 1469 | inode->i_atime = sbi->s_record_time; |
1470 | ||
56774805 MS |
1471 | if (!udf_disk_stamp_to_time(&inode->i_mtime, |
1472 | efe->modificationTime)) | |
cbf5676a | 1473 | inode->i_mtime = sbi->s_record_time; |
1474 | ||
56774805 | 1475 | if (!udf_disk_stamp_to_time(&iinfo->i_crtime, efe->createTime)) |
cbf5676a | 1476 | iinfo->i_crtime = sbi->s_record_time; |
1477 | ||
56774805 | 1478 | if (!udf_disk_stamp_to_time(&inode->i_ctime, efe->attrTime)) |
cbf5676a | 1479 | inode->i_ctime = sbi->s_record_time; |
1da177e4 | 1480 | |
48d6d8ff MS |
1481 | iinfo->i_unique = le64_to_cpu(efe->uniqueID); |
1482 | iinfo->i_lenEAttr = le32_to_cpu(efe->lengthExtendedAttr); | |
1483 | iinfo->i_lenAlloc = le32_to_cpu(efe->lengthAllocDescs); | |
d5e2cf07 | 1484 | iinfo->i_checkpoint = le32_to_cpu(efe->checkpoint); |
1da177e4 | 1485 | } |
470cca56 | 1486 | inode->i_generation = iinfo->i_unique; |
1da177e4 | 1487 | |
23b133bd JK |
1488 | /* |
1489 | * Sanity check length of allocation descriptors and extended attrs to | |
1490 | * avoid integer overflows | |
1491 | */ | |
1492 | if (iinfo->i_lenEAttr > bs || iinfo->i_lenAlloc > bs) | |
1493 | goto out; | |
1494 | /* Now do exact checks */ | |
1495 | if (udf_file_entry_alloc_offset(inode) + iinfo->i_lenAlloc > bs) | |
1496 | goto out; | |
e159332b JK |
1497 | /* Sanity checks for files in ICB so that we don't get confused later */ |
1498 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { | |
1499 | /* | |
1500 | * For file in ICB data is stored in allocation descriptor | |
1501 | * so sizes should match | |
1502 | */ | |
1503 | if (iinfo->i_lenAlloc != inode->i_size) | |
1504 | goto out; | |
1505 | /* File in ICB has to fit in there... */ | |
79144954 | 1506 | if (inode->i_size > bs - udf_file_entry_alloc_offset(inode)) |
e159332b JK |
1507 | goto out; |
1508 | } | |
1509 | ||
cb00ea35 CG |
1510 | switch (fe->icbTag.fileType) { |
1511 | case ICBTAG_FILE_TYPE_DIRECTORY: | |
28de7948 CG |
1512 | inode->i_op = &udf_dir_inode_operations; |
1513 | inode->i_fop = &udf_dir_operations; | |
1514 | inode->i_mode |= S_IFDIR; | |
1515 | inc_nlink(inode); | |
1516 | break; | |
cb00ea35 CG |
1517 | case ICBTAG_FILE_TYPE_REALTIME: |
1518 | case ICBTAG_FILE_TYPE_REGULAR: | |
1519 | case ICBTAG_FILE_TYPE_UNDEF: | |
742e1795 | 1520 | case ICBTAG_FILE_TYPE_VAT20: |
48d6d8ff | 1521 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
28de7948 CG |
1522 | inode->i_data.a_ops = &udf_adinicb_aops; |
1523 | else | |
1524 | inode->i_data.a_ops = &udf_aops; | |
1525 | inode->i_op = &udf_file_inode_operations; | |
1526 | inode->i_fop = &udf_file_operations; | |
1527 | inode->i_mode |= S_IFREG; | |
1528 | break; | |
cb00ea35 | 1529 | case ICBTAG_FILE_TYPE_BLOCK: |
28de7948 CG |
1530 | inode->i_mode |= S_IFBLK; |
1531 | break; | |
cb00ea35 | 1532 | case ICBTAG_FILE_TYPE_CHAR: |
28de7948 CG |
1533 | inode->i_mode |= S_IFCHR; |
1534 | break; | |
cb00ea35 | 1535 | case ICBTAG_FILE_TYPE_FIFO: |
28de7948 CG |
1536 | init_special_inode(inode, inode->i_mode | S_IFIFO, 0); |
1537 | break; | |
cb00ea35 | 1538 | case ICBTAG_FILE_TYPE_SOCKET: |
28de7948 CG |
1539 | init_special_inode(inode, inode->i_mode | S_IFSOCK, 0); |
1540 | break; | |
cb00ea35 | 1541 | case ICBTAG_FILE_TYPE_SYMLINK: |
28de7948 | 1542 | inode->i_data.a_ops = &udf_symlink_aops; |
c15d0fc0 | 1543 | inode->i_op = &udf_symlink_inode_operations; |
28de7948 CG |
1544 | inode->i_mode = S_IFLNK | S_IRWXUGO; |
1545 | break; | |
bfb257a5 JK |
1546 | case ICBTAG_FILE_TYPE_MAIN: |
1547 | udf_debug("METADATA FILE-----\n"); | |
1548 | break; | |
1549 | case ICBTAG_FILE_TYPE_MIRROR: | |
1550 | udf_debug("METADATA MIRROR FILE-----\n"); | |
1551 | break; | |
1552 | case ICBTAG_FILE_TYPE_BITMAP: | |
1553 | udf_debug("METADATA BITMAP FILE-----\n"); | |
1554 | break; | |
cb00ea35 | 1555 | default: |
78ace70c JP |
1556 | udf_err(inode->i_sb, "(ino %ld) failed unknown file type=%d\n", |
1557 | inode->i_ino, fe->icbTag.fileType); | |
6d3d5e86 | 1558 | goto out; |
1da177e4 | 1559 | } |
cb00ea35 | 1560 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { |
4b11111a MS |
1561 | struct deviceSpec *dsea = |
1562 | (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1); | |
cb00ea35 CG |
1563 | if (dsea) { |
1564 | init_special_inode(inode, inode->i_mode, | |
4b11111a MS |
1565 | MKDEV(le32_to_cpu(dsea->majorDeviceIdent), |
1566 | le32_to_cpu(dsea->minorDeviceIdent))); | |
1da177e4 | 1567 | /* Developer ID ??? */ |
4b11111a | 1568 | } else |
6d3d5e86 | 1569 | goto out; |
1da177e4 | 1570 | } |
6d3d5e86 JK |
1571 | ret = 0; |
1572 | out: | |
bb7720a0 | 1573 | brelse(bh); |
6d3d5e86 | 1574 | return ret; |
1da177e4 LT |
1575 | } |
1576 | ||
647bd61a CG |
1577 | static int udf_alloc_i_data(struct inode *inode, size_t size) |
1578 | { | |
48d6d8ff MS |
1579 | struct udf_inode_info *iinfo = UDF_I(inode); |
1580 | iinfo->i_ext.i_data = kmalloc(size, GFP_KERNEL); | |
647bd61a | 1581 | |
48d6d8ff | 1582 | if (!iinfo->i_ext.i_data) { |
78ace70c JP |
1583 | udf_err(inode->i_sb, "(ino %ld) no free memory\n", |
1584 | inode->i_ino); | |
647bd61a CG |
1585 | return -ENOMEM; |
1586 | } | |
1587 | ||
1588 | return 0; | |
1589 | } | |
1590 | ||
faa17292 | 1591 | static umode_t udf_convert_permissions(struct fileEntry *fe) |
1da177e4 | 1592 | { |
faa17292 | 1593 | umode_t mode; |
1da177e4 LT |
1594 | uint32_t permissions; |
1595 | uint32_t flags; | |
1596 | ||
1597 | permissions = le32_to_cpu(fe->permissions); | |
1598 | flags = le16_to_cpu(fe->icbTag.flags); | |
1599 | ||
4b11111a MS |
1600 | mode = ((permissions) & S_IRWXO) | |
1601 | ((permissions >> 2) & S_IRWXG) | | |
1602 | ((permissions >> 4) & S_IRWXU) | | |
1603 | ((flags & ICBTAG_FLAG_SETUID) ? S_ISUID : 0) | | |
1604 | ((flags & ICBTAG_FLAG_SETGID) ? S_ISGID : 0) | | |
1605 | ((flags & ICBTAG_FLAG_STICKY) ? S_ISVTX : 0); | |
1da177e4 LT |
1606 | |
1607 | return mode; | |
1608 | } | |
1609 | ||
a9185b41 | 1610 | int udf_write_inode(struct inode *inode, struct writeback_control *wbc) |
1da177e4 | 1611 | { |
49521de1 | 1612 | return udf_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL); |
1da177e4 LT |
1613 | } |
1614 | ||
49521de1 | 1615 | static int udf_sync_inode(struct inode *inode) |
1da177e4 LT |
1616 | { |
1617 | return udf_update_inode(inode, 1); | |
1618 | } | |
1619 | ||
cb00ea35 | 1620 | static int udf_update_inode(struct inode *inode, int do_sync) |
1da177e4 LT |
1621 | { |
1622 | struct buffer_head *bh = NULL; | |
1623 | struct fileEntry *fe; | |
1624 | struct extendedFileEntry *efe; | |
b2527bfa | 1625 | uint64_t lb_recorded; |
1da177e4 LT |
1626 | uint32_t udfperms; |
1627 | uint16_t icbflags; | |
1628 | uint16_t crclen; | |
1da177e4 | 1629 | int err = 0; |
6c79e987 | 1630 | struct udf_sb_info *sbi = UDF_SB(inode->i_sb); |
4b11111a | 1631 | unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; |
48d6d8ff | 1632 | struct udf_inode_info *iinfo = UDF_I(inode); |
1da177e4 | 1633 | |
5833ded9 JK |
1634 | bh = udf_tgetblk(inode->i_sb, |
1635 | udf_get_lb_pblock(inode->i_sb, &iinfo->i_location, 0)); | |
cb00ea35 | 1636 | if (!bh) { |
aae917cd | 1637 | udf_debug("getblk failure\n"); |
0fd2ba36 | 1638 | return -EIO; |
1da177e4 LT |
1639 | } |
1640 | ||
aae917cd JK |
1641 | lock_buffer(bh); |
1642 | memset(bh->b_data, 0, inode->i_sb->s_blocksize); | |
1da177e4 LT |
1643 | fe = (struct fileEntry *)bh->b_data; |
1644 | efe = (struct extendedFileEntry *)bh->b_data; | |
1645 | ||
aae917cd | 1646 | if (iinfo->i_use) { |
1da177e4 | 1647 | struct unallocSpaceEntry *use = |
28de7948 | 1648 | (struct unallocSpaceEntry *)bh->b_data; |
1da177e4 | 1649 | |
48d6d8ff | 1650 | use->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc); |
4b11111a | 1651 | memcpy(bh->b_data + sizeof(struct unallocSpaceEntry), |
48d6d8ff | 1652 | iinfo->i_ext.i_data, inode->i_sb->s_blocksize - |
4b11111a | 1653 | sizeof(struct unallocSpaceEntry)); |
aae917cd | 1654 | use->descTag.tagIdent = cpu_to_le16(TAG_IDENT_USE); |
70f19f58 | 1655 | crclen = sizeof(struct unallocSpaceEntry); |
1da177e4 | 1656 | |
70f19f58 | 1657 | goto finish; |
1da177e4 LT |
1658 | } |
1659 | ||
4d6660eb PS |
1660 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_FORGET)) |
1661 | fe->uid = cpu_to_le32(-1); | |
cb00ea35 | 1662 | else |
c2ba138a | 1663 | fe->uid = cpu_to_le32(i_uid_read(inode)); |
1da177e4 | 1664 | |
4d6660eb PS |
1665 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_FORGET)) |
1666 | fe->gid = cpu_to_le32(-1); | |
cb00ea35 | 1667 | else |
c2ba138a | 1668 | fe->gid = cpu_to_le32(i_gid_read(inode)); |
1da177e4 | 1669 | |
4b11111a MS |
1670 | udfperms = ((inode->i_mode & S_IRWXO)) | |
1671 | ((inode->i_mode & S_IRWXG) << 2) | | |
1672 | ((inode->i_mode & S_IRWXU) << 4); | |
1da177e4 | 1673 | |
4b11111a MS |
1674 | udfperms |= (le32_to_cpu(fe->permissions) & |
1675 | (FE_PERM_O_DELETE | FE_PERM_O_CHATTR | | |
1676 | FE_PERM_G_DELETE | FE_PERM_G_CHATTR | | |
1677 | FE_PERM_U_DELETE | FE_PERM_U_CHATTR)); | |
1da177e4 LT |
1678 | fe->permissions = cpu_to_le32(udfperms); |
1679 | ||
8a70ee33 | 1680 | if (S_ISDIR(inode->i_mode) && inode->i_nlink > 0) |
1da177e4 LT |
1681 | fe->fileLinkCount = cpu_to_le16(inode->i_nlink - 1); |
1682 | else | |
1683 | fe->fileLinkCount = cpu_to_le16(inode->i_nlink); | |
1684 | ||
1685 | fe->informationLength = cpu_to_le64(inode->i_size); | |
1686 | ||
cb00ea35 | 1687 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { |
5ca4e4be | 1688 | struct regid *eid; |
28de7948 CG |
1689 | struct deviceSpec *dsea = |
1690 | (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1); | |
cb00ea35 | 1691 | if (!dsea) { |
1da177e4 | 1692 | dsea = (struct deviceSpec *) |
28de7948 CG |
1693 | udf_add_extendedattr(inode, |
1694 | sizeof(struct deviceSpec) + | |
5ca4e4be | 1695 | sizeof(struct regid), 12, 0x3); |
1da177e4 LT |
1696 | dsea->attrType = cpu_to_le32(12); |
1697 | dsea->attrSubtype = 1; | |
4b11111a MS |
1698 | dsea->attrLength = cpu_to_le32( |
1699 | sizeof(struct deviceSpec) + | |
5ca4e4be PE |
1700 | sizeof(struct regid)); |
1701 | dsea->impUseLength = cpu_to_le32(sizeof(struct regid)); | |
1da177e4 | 1702 | } |
5ca4e4be PE |
1703 | eid = (struct regid *)dsea->impUse; |
1704 | memset(eid, 0, sizeof(struct regid)); | |
1da177e4 LT |
1705 | strcpy(eid->ident, UDF_ID_DEVELOPER); |
1706 | eid->identSuffix[0] = UDF_OS_CLASS_UNIX; | |
1707 | eid->identSuffix[1] = UDF_OS_ID_LINUX; | |
1708 | dsea->majorDeviceIdent = cpu_to_le32(imajor(inode)); | |
1709 | dsea->minorDeviceIdent = cpu_to_le32(iminor(inode)); | |
1710 | } | |
1711 | ||
b2527bfa SN |
1712 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1713 | lb_recorded = 0; /* No extents => no blocks! */ | |
1714 | else | |
1715 | lb_recorded = | |
1716 | (inode->i_blocks + (1 << (blocksize_bits - 9)) - 1) >> | |
1717 | (blocksize_bits - 9); | |
1718 | ||
48d6d8ff | 1719 | if (iinfo->i_efe == 0) { |
c0b34438 | 1720 | memcpy(bh->b_data + sizeof(struct fileEntry), |
48d6d8ff | 1721 | iinfo->i_ext.i_data, |
cb00ea35 | 1722 | inode->i_sb->s_blocksize - sizeof(struct fileEntry)); |
b2527bfa | 1723 | fe->logicalBlocksRecorded = cpu_to_le64(lb_recorded); |
1da177e4 | 1724 | |
56774805 MS |
1725 | udf_time_to_disk_stamp(&fe->accessTime, inode->i_atime); |
1726 | udf_time_to_disk_stamp(&fe->modificationTime, inode->i_mtime); | |
1727 | udf_time_to_disk_stamp(&fe->attrTime, inode->i_ctime); | |
5ca4e4be | 1728 | memset(&(fe->impIdent), 0, sizeof(struct regid)); |
1da177e4 LT |
1729 | strcpy(fe->impIdent.ident, UDF_ID_DEVELOPER); |
1730 | fe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; | |
1731 | fe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; | |
48d6d8ff MS |
1732 | fe->uniqueID = cpu_to_le64(iinfo->i_unique); |
1733 | fe->lengthExtendedAttr = cpu_to_le32(iinfo->i_lenEAttr); | |
1734 | fe->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc); | |
d5e2cf07 | 1735 | fe->checkpoint = cpu_to_le32(iinfo->i_checkpoint); |
1da177e4 LT |
1736 | fe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_FE); |
1737 | crclen = sizeof(struct fileEntry); | |
cb00ea35 | 1738 | } else { |
4b11111a | 1739 | memcpy(bh->b_data + sizeof(struct extendedFileEntry), |
48d6d8ff | 1740 | iinfo->i_ext.i_data, |
4b11111a MS |
1741 | inode->i_sb->s_blocksize - |
1742 | sizeof(struct extendedFileEntry)); | |
1da177e4 | 1743 | efe->objectSize = cpu_to_le64(inode->i_size); |
b2527bfa | 1744 | efe->logicalBlocksRecorded = cpu_to_le64(lb_recorded); |
1da177e4 | 1745 | |
48d6d8ff MS |
1746 | if (iinfo->i_crtime.tv_sec > inode->i_atime.tv_sec || |
1747 | (iinfo->i_crtime.tv_sec == inode->i_atime.tv_sec && | |
1748 | iinfo->i_crtime.tv_nsec > inode->i_atime.tv_nsec)) | |
1749 | iinfo->i_crtime = inode->i_atime; | |
4b11111a | 1750 | |
48d6d8ff MS |
1751 | if (iinfo->i_crtime.tv_sec > inode->i_mtime.tv_sec || |
1752 | (iinfo->i_crtime.tv_sec == inode->i_mtime.tv_sec && | |
1753 | iinfo->i_crtime.tv_nsec > inode->i_mtime.tv_nsec)) | |
1754 | iinfo->i_crtime = inode->i_mtime; | |
4b11111a | 1755 | |
48d6d8ff MS |
1756 | if (iinfo->i_crtime.tv_sec > inode->i_ctime.tv_sec || |
1757 | (iinfo->i_crtime.tv_sec == inode->i_ctime.tv_sec && | |
1758 | iinfo->i_crtime.tv_nsec > inode->i_ctime.tv_nsec)) | |
1759 | iinfo->i_crtime = inode->i_ctime; | |
1da177e4 | 1760 | |
56774805 MS |
1761 | udf_time_to_disk_stamp(&efe->accessTime, inode->i_atime); |
1762 | udf_time_to_disk_stamp(&efe->modificationTime, inode->i_mtime); | |
1763 | udf_time_to_disk_stamp(&efe->createTime, iinfo->i_crtime); | |
1764 | udf_time_to_disk_stamp(&efe->attrTime, inode->i_ctime); | |
1da177e4 | 1765 | |
5ca4e4be | 1766 | memset(&(efe->impIdent), 0, sizeof(struct regid)); |
1da177e4 LT |
1767 | strcpy(efe->impIdent.ident, UDF_ID_DEVELOPER); |
1768 | efe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; | |
1769 | efe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; | |
48d6d8ff MS |
1770 | efe->uniqueID = cpu_to_le64(iinfo->i_unique); |
1771 | efe->lengthExtendedAttr = cpu_to_le32(iinfo->i_lenEAttr); | |
1772 | efe->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc); | |
d5e2cf07 | 1773 | efe->checkpoint = cpu_to_le32(iinfo->i_checkpoint); |
1da177e4 LT |
1774 | efe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_EFE); |
1775 | crclen = sizeof(struct extendedFileEntry); | |
1776 | } | |
70f19f58 SM |
1777 | |
1778 | finish: | |
48d6d8ff | 1779 | if (iinfo->i_strat4096) { |
1da177e4 LT |
1780 | fe->icbTag.strategyType = cpu_to_le16(4096); |
1781 | fe->icbTag.strategyParameter = cpu_to_le16(1); | |
1782 | fe->icbTag.numEntries = cpu_to_le16(2); | |
cb00ea35 | 1783 | } else { |
1da177e4 LT |
1784 | fe->icbTag.strategyType = cpu_to_le16(4); |
1785 | fe->icbTag.numEntries = cpu_to_le16(1); | |
1786 | } | |
1787 | ||
70f19f58 SM |
1788 | if (iinfo->i_use) |
1789 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_USE; | |
1790 | else if (S_ISDIR(inode->i_mode)) | |
1da177e4 LT |
1791 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_DIRECTORY; |
1792 | else if (S_ISREG(inode->i_mode)) | |
1793 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_REGULAR; | |
1794 | else if (S_ISLNK(inode->i_mode)) | |
1795 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_SYMLINK; | |
1796 | else if (S_ISBLK(inode->i_mode)) | |
1797 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_BLOCK; | |
1798 | else if (S_ISCHR(inode->i_mode)) | |
1799 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_CHAR; | |
1800 | else if (S_ISFIFO(inode->i_mode)) | |
1801 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_FIFO; | |
1802 | else if (S_ISSOCK(inode->i_mode)) | |
1803 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_SOCKET; | |
1804 | ||
48d6d8ff | 1805 | icbflags = iinfo->i_alloc_type | |
28de7948 CG |
1806 | ((inode->i_mode & S_ISUID) ? ICBTAG_FLAG_SETUID : 0) | |
1807 | ((inode->i_mode & S_ISGID) ? ICBTAG_FLAG_SETGID : 0) | | |
1808 | ((inode->i_mode & S_ISVTX) ? ICBTAG_FLAG_STICKY : 0) | | |
1809 | (le16_to_cpu(fe->icbTag.flags) & | |
1810 | ~(ICBTAG_FLAG_AD_MASK | ICBTAG_FLAG_SETUID | | |
1811 | ICBTAG_FLAG_SETGID | ICBTAG_FLAG_STICKY)); | |
1da177e4 LT |
1812 | |
1813 | fe->icbTag.flags = cpu_to_le16(icbflags); | |
6c79e987 | 1814 | if (sbi->s_udfrev >= 0x0200) |
1da177e4 LT |
1815 | fe->descTag.descVersion = cpu_to_le16(3); |
1816 | else | |
1817 | fe->descTag.descVersion = cpu_to_le16(2); | |
6c79e987 | 1818 | fe->descTag.tagSerialNum = cpu_to_le16(sbi->s_serial_number); |
4b11111a | 1819 | fe->descTag.tagLocation = cpu_to_le32( |
48d6d8ff | 1820 | iinfo->i_location.logicalBlockNum); |
aae917cd | 1821 | crclen += iinfo->i_lenEAttr + iinfo->i_lenAlloc - sizeof(struct tag); |
1da177e4 | 1822 | fe->descTag.descCRCLength = cpu_to_le16(crclen); |
5ca4e4be | 1823 | fe->descTag.descCRC = cpu_to_le16(crc_itu_t(0, (char *)fe + sizeof(struct tag), |
f845fced | 1824 | crclen)); |
3f2587bb | 1825 | fe->descTag.tagChecksum = udf_tag_checksum(&fe->descTag); |
1da177e4 | 1826 | |
5833ded9 | 1827 | set_buffer_uptodate(bh); |
aae917cd JK |
1828 | unlock_buffer(bh); |
1829 | ||
1da177e4 LT |
1830 | /* write the data blocks */ |
1831 | mark_buffer_dirty(bh); | |
cb00ea35 | 1832 | if (do_sync) { |
1da177e4 | 1833 | sync_dirty_buffer(bh); |
aae917cd | 1834 | if (buffer_write_io_error(bh)) { |
78ace70c JP |
1835 | udf_warn(inode->i_sb, "IO error syncing udf inode [%08lx]\n", |
1836 | inode->i_ino); | |
1da177e4 LT |
1837 | err = -EIO; |
1838 | } | |
1839 | } | |
3bf25cb4 | 1840 | brelse(bh); |
28de7948 | 1841 | |
1da177e4 LT |
1842 | return err; |
1843 | } | |
1844 | ||
6174c2eb JK |
1845 | struct inode *__udf_iget(struct super_block *sb, struct kernel_lb_addr *ino, |
1846 | bool hidden_inode) | |
1da177e4 LT |
1847 | { |
1848 | unsigned long block = udf_get_lb_pblock(sb, ino, 0); | |
1849 | struct inode *inode = iget_locked(sb, block); | |
6d3d5e86 | 1850 | int err; |
1da177e4 LT |
1851 | |
1852 | if (!inode) | |
6d3d5e86 | 1853 | return ERR_PTR(-ENOMEM); |
1da177e4 | 1854 | |
6d3d5e86 JK |
1855 | if (!(inode->i_state & I_NEW)) |
1856 | return inode; | |
1da177e4 | 1857 | |
6d3d5e86 | 1858 | memcpy(&UDF_I(inode)->i_location, ino, sizeof(struct kernel_lb_addr)); |
6174c2eb | 1859 | err = udf_read_inode(inode, hidden_inode); |
6d3d5e86 JK |
1860 | if (err < 0) { |
1861 | iget_failed(inode); | |
1862 | return ERR_PTR(err); | |
1da177e4 | 1863 | } |
6d3d5e86 | 1864 | unlock_new_inode(inode); |
1da177e4 LT |
1865 | |
1866 | return inode; | |
1da177e4 LT |
1867 | } |
1868 | ||
7e49b6f2 JK |
1869 | int udf_add_aext(struct inode *inode, struct extent_position *epos, |
1870 | struct kernel_lb_addr *eloc, uint32_t elen, int inc) | |
1da177e4 LT |
1871 | { |
1872 | int adsize; | |
5ca4e4be PE |
1873 | struct short_ad *sad = NULL; |
1874 | struct long_ad *lad = NULL; | |
1da177e4 | 1875 | struct allocExtDesc *aed; |
1da177e4 | 1876 | uint8_t *ptr; |
48d6d8ff | 1877 | struct udf_inode_info *iinfo = UDF_I(inode); |
1da177e4 | 1878 | |
ff116fc8 | 1879 | if (!epos->bh) |
48d6d8ff | 1880 | ptr = iinfo->i_ext.i_data + epos->offset - |
4b11111a | 1881 | udf_file_entry_alloc_offset(inode) + |
48d6d8ff | 1882 | iinfo->i_lenEAttr; |
1da177e4 | 1883 | else |
ff116fc8 | 1884 | ptr = epos->bh->b_data + epos->offset; |
1da177e4 | 1885 | |
48d6d8ff | 1886 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
5ca4e4be | 1887 | adsize = sizeof(struct short_ad); |
48d6d8ff | 1888 | else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
5ca4e4be | 1889 | adsize = sizeof(struct long_ad); |
1da177e4 | 1890 | else |
7e49b6f2 | 1891 | return -EIO; |
1da177e4 | 1892 | |
cb00ea35 | 1893 | if (epos->offset + (2 * adsize) > inode->i_sb->s_blocksize) { |
391e8bbd | 1894 | unsigned char *sptr, *dptr; |
1da177e4 LT |
1895 | struct buffer_head *nbh; |
1896 | int err, loffset; | |
5ca4e4be | 1897 | struct kernel_lb_addr obloc = epos->block; |
1da177e4 | 1898 | |
4b11111a MS |
1899 | epos->block.logicalBlockNum = udf_new_block(inode->i_sb, NULL, |
1900 | obloc.partitionReferenceNum, | |
1901 | obloc.logicalBlockNum, &err); | |
1902 | if (!epos->block.logicalBlockNum) | |
7e49b6f2 | 1903 | return -ENOSPC; |
4b11111a | 1904 | nbh = udf_tgetblk(inode->i_sb, udf_get_lb_pblock(inode->i_sb, |
97e961fd | 1905 | &epos->block, |
4b11111a MS |
1906 | 0)); |
1907 | if (!nbh) | |
7e49b6f2 | 1908 | return -EIO; |
1da177e4 LT |
1909 | lock_buffer(nbh); |
1910 | memset(nbh->b_data, 0x00, inode->i_sb->s_blocksize); | |
1911 | set_buffer_uptodate(nbh); | |
1912 | unlock_buffer(nbh); | |
1913 | mark_buffer_dirty_inode(nbh, inode); | |
1914 | ||
1915 | aed = (struct allocExtDesc *)(nbh->b_data); | |
1916 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT)) | |
4b11111a MS |
1917 | aed->previousAllocExtLocation = |
1918 | cpu_to_le32(obloc.logicalBlockNum); | |
cb00ea35 | 1919 | if (epos->offset + adsize > inode->i_sb->s_blocksize) { |
ff116fc8 | 1920 | loffset = epos->offset; |
1da177e4 LT |
1921 | aed->lengthAllocDescs = cpu_to_le32(adsize); |
1922 | sptr = ptr - adsize; | |
1923 | dptr = nbh->b_data + sizeof(struct allocExtDesc); | |
1924 | memcpy(dptr, sptr, adsize); | |
ff116fc8 | 1925 | epos->offset = sizeof(struct allocExtDesc) + adsize; |
cb00ea35 | 1926 | } else { |
ff116fc8 | 1927 | loffset = epos->offset + adsize; |
1da177e4 LT |
1928 | aed->lengthAllocDescs = cpu_to_le32(0); |
1929 | sptr = ptr; | |
ff116fc8 | 1930 | epos->offset = sizeof(struct allocExtDesc); |
1da177e4 | 1931 | |
cb00ea35 | 1932 | if (epos->bh) { |
ff116fc8 | 1933 | aed = (struct allocExtDesc *)epos->bh->b_data; |
c2104fda | 1934 | le32_add_cpu(&aed->lengthAllocDescs, adsize); |
cb00ea35 | 1935 | } else { |
48d6d8ff | 1936 | iinfo->i_lenAlloc += adsize; |
1da177e4 LT |
1937 | mark_inode_dirty(inode); |
1938 | } | |
1939 | } | |
6c79e987 | 1940 | if (UDF_SB(inode->i_sb)->s_udfrev >= 0x0200) |
1da177e4 | 1941 | udf_new_tag(nbh->b_data, TAG_IDENT_AED, 3, 1, |
5ca4e4be | 1942 | epos->block.logicalBlockNum, sizeof(struct tag)); |
1da177e4 LT |
1943 | else |
1944 | udf_new_tag(nbh->b_data, TAG_IDENT_AED, 2, 1, | |
5ca4e4be | 1945 | epos->block.logicalBlockNum, sizeof(struct tag)); |
48d6d8ff | 1946 | switch (iinfo->i_alloc_type) { |
cb00ea35 | 1947 | case ICBTAG_FLAG_AD_SHORT: |
5ca4e4be | 1948 | sad = (struct short_ad *)sptr; |
28de7948 CG |
1949 | sad->extLength = cpu_to_le32(EXT_NEXT_EXTENT_ALLOCDECS | |
1950 | inode->i_sb->s_blocksize); | |
4b11111a MS |
1951 | sad->extPosition = |
1952 | cpu_to_le32(epos->block.logicalBlockNum); | |
28de7948 | 1953 | break; |
cb00ea35 | 1954 | case ICBTAG_FLAG_AD_LONG: |
5ca4e4be | 1955 | lad = (struct long_ad *)sptr; |
28de7948 CG |
1956 | lad->extLength = cpu_to_le32(EXT_NEXT_EXTENT_ALLOCDECS | |
1957 | inode->i_sb->s_blocksize); | |
1958 | lad->extLocation = cpu_to_lelb(epos->block); | |
1959 | memset(lad->impUse, 0x00, sizeof(lad->impUse)); | |
1960 | break; | |
1da177e4 | 1961 | } |
cb00ea35 | 1962 | if (epos->bh) { |
28de7948 | 1963 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
6c79e987 | 1964 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) |
ff116fc8 | 1965 | udf_update_tag(epos->bh->b_data, loffset); |
1da177e4 | 1966 | else |
4b11111a MS |
1967 | udf_update_tag(epos->bh->b_data, |
1968 | sizeof(struct allocExtDesc)); | |
ff116fc8 | 1969 | mark_buffer_dirty_inode(epos->bh, inode); |
3bf25cb4 | 1970 | brelse(epos->bh); |
28de7948 | 1971 | } else { |
1da177e4 | 1972 | mark_inode_dirty(inode); |
28de7948 | 1973 | } |
ff116fc8 | 1974 | epos->bh = nbh; |
1da177e4 LT |
1975 | } |
1976 | ||
7e49b6f2 | 1977 | udf_write_aext(inode, epos, eloc, elen, inc); |
1da177e4 | 1978 | |
cb00ea35 | 1979 | if (!epos->bh) { |
48d6d8ff | 1980 | iinfo->i_lenAlloc += adsize; |
1da177e4 | 1981 | mark_inode_dirty(inode); |
cb00ea35 | 1982 | } else { |
ff116fc8 | 1983 | aed = (struct allocExtDesc *)epos->bh->b_data; |
c2104fda | 1984 | le32_add_cpu(&aed->lengthAllocDescs, adsize); |
4b11111a MS |
1985 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
1986 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) | |
1987 | udf_update_tag(epos->bh->b_data, | |
1988 | epos->offset + (inc ? 0 : adsize)); | |
1da177e4 | 1989 | else |
4b11111a MS |
1990 | udf_update_tag(epos->bh->b_data, |
1991 | sizeof(struct allocExtDesc)); | |
ff116fc8 | 1992 | mark_buffer_dirty_inode(epos->bh, inode); |
1da177e4 LT |
1993 | } |
1994 | ||
7e49b6f2 | 1995 | return 0; |
1da177e4 LT |
1996 | } |
1997 | ||
7e49b6f2 JK |
1998 | void udf_write_aext(struct inode *inode, struct extent_position *epos, |
1999 | struct kernel_lb_addr *eloc, uint32_t elen, int inc) | |
1da177e4 LT |
2000 | { |
2001 | int adsize; | |
2002 | uint8_t *ptr; | |
5ca4e4be PE |
2003 | struct short_ad *sad; |
2004 | struct long_ad *lad; | |
48d6d8ff | 2005 | struct udf_inode_info *iinfo = UDF_I(inode); |
1da177e4 | 2006 | |
ff116fc8 | 2007 | if (!epos->bh) |
48d6d8ff | 2008 | ptr = iinfo->i_ext.i_data + epos->offset - |
4b11111a | 2009 | udf_file_entry_alloc_offset(inode) + |
48d6d8ff | 2010 | iinfo->i_lenEAttr; |
1da177e4 | 2011 | else |
ff116fc8 | 2012 | ptr = epos->bh->b_data + epos->offset; |
1da177e4 | 2013 | |
48d6d8ff | 2014 | switch (iinfo->i_alloc_type) { |
cb00ea35 | 2015 | case ICBTAG_FLAG_AD_SHORT: |
5ca4e4be | 2016 | sad = (struct short_ad *)ptr; |
28de7948 | 2017 | sad->extLength = cpu_to_le32(elen); |
97e961fd | 2018 | sad->extPosition = cpu_to_le32(eloc->logicalBlockNum); |
5ca4e4be | 2019 | adsize = sizeof(struct short_ad); |
28de7948 | 2020 | break; |
cb00ea35 | 2021 | case ICBTAG_FLAG_AD_LONG: |
5ca4e4be | 2022 | lad = (struct long_ad *)ptr; |
28de7948 | 2023 | lad->extLength = cpu_to_le32(elen); |
97e961fd | 2024 | lad->extLocation = cpu_to_lelb(*eloc); |
28de7948 | 2025 | memset(lad->impUse, 0x00, sizeof(lad->impUse)); |
5ca4e4be | 2026 | adsize = sizeof(struct long_ad); |
28de7948 | 2027 | break; |
cb00ea35 | 2028 | default: |
7e49b6f2 | 2029 | return; |
1da177e4 LT |
2030 | } |
2031 | ||
cb00ea35 | 2032 | if (epos->bh) { |
28de7948 | 2033 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
6c79e987 | 2034 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) { |
4b11111a MS |
2035 | struct allocExtDesc *aed = |
2036 | (struct allocExtDesc *)epos->bh->b_data; | |
ff116fc8 | 2037 | udf_update_tag(epos->bh->b_data, |
4b11111a MS |
2038 | le32_to_cpu(aed->lengthAllocDescs) + |
2039 | sizeof(struct allocExtDesc)); | |
1da177e4 | 2040 | } |
ff116fc8 | 2041 | mark_buffer_dirty_inode(epos->bh, inode); |
28de7948 | 2042 | } else { |
1da177e4 | 2043 | mark_inode_dirty(inode); |
28de7948 | 2044 | } |
1da177e4 LT |
2045 | |
2046 | if (inc) | |
ff116fc8 | 2047 | epos->offset += adsize; |
1da177e4 LT |
2048 | } |
2049 | ||
aef22a3d VN |
2050 | /* |
2051 | * Only 1 indirect extent in a row really makes sense but allow upto 16 in case | |
2052 | * someone does some weird stuff. | |
2053 | */ | |
2054 | #define UDF_MAX_INDIR_EXTS 16 | |
2055 | ||
4b11111a | 2056 | int8_t udf_next_aext(struct inode *inode, struct extent_position *epos, |
5ca4e4be | 2057 | struct kernel_lb_addr *eloc, uint32_t *elen, int inc) |
1da177e4 LT |
2058 | { |
2059 | int8_t etype; | |
aef22a3d | 2060 | unsigned int indirections = 0; |
1da177e4 | 2061 | |
ff116fc8 | 2062 | while ((etype = udf_current_aext(inode, epos, eloc, elen, inc)) == |
cb00ea35 | 2063 | (EXT_NEXT_EXTENT_ALLOCDECS >> 30)) { |
4b11111a | 2064 | int block; |
aef22a3d VN |
2065 | |
2066 | if (++indirections > UDF_MAX_INDIR_EXTS) { | |
2067 | udf_err(inode->i_sb, | |
2068 | "too many indirect extents in inode %lu\n", | |
2069 | inode->i_ino); | |
2070 | return -1; | |
2071 | } | |
2072 | ||
ff116fc8 JK |
2073 | epos->block = *eloc; |
2074 | epos->offset = sizeof(struct allocExtDesc); | |
3bf25cb4 | 2075 | brelse(epos->bh); |
97e961fd | 2076 | block = udf_get_lb_pblock(inode->i_sb, &epos->block, 0); |
4b11111a MS |
2077 | epos->bh = udf_tread(inode->i_sb, block); |
2078 | if (!epos->bh) { | |
2079 | udf_debug("reading block %d failed!\n", block); | |
1da177e4 LT |
2080 | return -1; |
2081 | } | |
2082 | } | |
2083 | ||
2084 | return etype; | |
2085 | } | |
2086 | ||
4b11111a | 2087 | int8_t udf_current_aext(struct inode *inode, struct extent_position *epos, |
5ca4e4be | 2088 | struct kernel_lb_addr *eloc, uint32_t *elen, int inc) |
1da177e4 LT |
2089 | { |
2090 | int alen; | |
2091 | int8_t etype; | |
2092 | uint8_t *ptr; | |
5ca4e4be PE |
2093 | struct short_ad *sad; |
2094 | struct long_ad *lad; | |
48d6d8ff | 2095 | struct udf_inode_info *iinfo = UDF_I(inode); |
28de7948 | 2096 | |
cb00ea35 | 2097 | if (!epos->bh) { |
ff116fc8 JK |
2098 | if (!epos->offset) |
2099 | epos->offset = udf_file_entry_alloc_offset(inode); | |
48d6d8ff | 2100 | ptr = iinfo->i_ext.i_data + epos->offset - |
4b11111a | 2101 | udf_file_entry_alloc_offset(inode) + |
48d6d8ff | 2102 | iinfo->i_lenEAttr; |
4b11111a | 2103 | alen = udf_file_entry_alloc_offset(inode) + |
48d6d8ff | 2104 | iinfo->i_lenAlloc; |
cb00ea35 | 2105 | } else { |
ff116fc8 JK |
2106 | if (!epos->offset) |
2107 | epos->offset = sizeof(struct allocExtDesc); | |
2108 | ptr = epos->bh->b_data + epos->offset; | |
28de7948 | 2109 | alen = sizeof(struct allocExtDesc) + |
4b11111a MS |
2110 | le32_to_cpu(((struct allocExtDesc *)epos->bh->b_data)-> |
2111 | lengthAllocDescs); | |
1da177e4 LT |
2112 | } |
2113 | ||
48d6d8ff | 2114 | switch (iinfo->i_alloc_type) { |
cb00ea35 | 2115 | case ICBTAG_FLAG_AD_SHORT: |
4b11111a MS |
2116 | sad = udf_get_fileshortad(ptr, alen, &epos->offset, inc); |
2117 | if (!sad) | |
28de7948 CG |
2118 | return -1; |
2119 | etype = le32_to_cpu(sad->extLength) >> 30; | |
2120 | eloc->logicalBlockNum = le32_to_cpu(sad->extPosition); | |
4b11111a | 2121 | eloc->partitionReferenceNum = |
48d6d8ff | 2122 | iinfo->i_location.partitionReferenceNum; |
28de7948 CG |
2123 | *elen = le32_to_cpu(sad->extLength) & UDF_EXTENT_LENGTH_MASK; |
2124 | break; | |
cb00ea35 | 2125 | case ICBTAG_FLAG_AD_LONG: |
4b11111a MS |
2126 | lad = udf_get_filelongad(ptr, alen, &epos->offset, inc); |
2127 | if (!lad) | |
1da177e4 | 2128 | return -1; |
28de7948 CG |
2129 | etype = le32_to_cpu(lad->extLength) >> 30; |
2130 | *eloc = lelb_to_cpu(lad->extLocation); | |
2131 | *elen = le32_to_cpu(lad->extLength) & UDF_EXTENT_LENGTH_MASK; | |
2132 | break; | |
2133 | default: | |
a983f368 | 2134 | udf_debug("alloc_type = %d unsupported\n", iinfo->i_alloc_type); |
28de7948 | 2135 | return -1; |
1da177e4 LT |
2136 | } |
2137 | ||
2138 | return etype; | |
2139 | } | |
2140 | ||
28de7948 | 2141 | static int8_t udf_insert_aext(struct inode *inode, struct extent_position epos, |
5ca4e4be | 2142 | struct kernel_lb_addr neloc, uint32_t nelen) |
1da177e4 | 2143 | { |
5ca4e4be | 2144 | struct kernel_lb_addr oeloc; |
1da177e4 LT |
2145 | uint32_t oelen; |
2146 | int8_t etype; | |
2147 | ||
ff116fc8 | 2148 | if (epos.bh) |
3bf25cb4 | 2149 | get_bh(epos.bh); |
1da177e4 | 2150 | |
cb00ea35 | 2151 | while ((etype = udf_next_aext(inode, &epos, &oeloc, &oelen, 0)) != -1) { |
97e961fd | 2152 | udf_write_aext(inode, &epos, &neloc, nelen, 1); |
1da177e4 LT |
2153 | neloc = oeloc; |
2154 | nelen = (etype << 30) | oelen; | |
2155 | } | |
97e961fd | 2156 | udf_add_aext(inode, &epos, &neloc, nelen, 1); |
3bf25cb4 | 2157 | brelse(epos.bh); |
28de7948 | 2158 | |
1da177e4 LT |
2159 | return (nelen >> 30); |
2160 | } | |
2161 | ||
4b11111a | 2162 | int8_t udf_delete_aext(struct inode *inode, struct extent_position epos, |
5ca4e4be | 2163 | struct kernel_lb_addr eloc, uint32_t elen) |
1da177e4 | 2164 | { |
ff116fc8 JK |
2165 | struct extent_position oepos; |
2166 | int adsize; | |
1da177e4 LT |
2167 | int8_t etype; |
2168 | struct allocExtDesc *aed; | |
48d6d8ff | 2169 | struct udf_inode_info *iinfo; |
1da177e4 | 2170 | |
cb00ea35 | 2171 | if (epos.bh) { |
3bf25cb4 JK |
2172 | get_bh(epos.bh); |
2173 | get_bh(epos.bh); | |
1da177e4 LT |
2174 | } |
2175 | ||
48d6d8ff MS |
2176 | iinfo = UDF_I(inode); |
2177 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) | |
5ca4e4be | 2178 | adsize = sizeof(struct short_ad); |
48d6d8ff | 2179 | else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
5ca4e4be | 2180 | adsize = sizeof(struct long_ad); |
1da177e4 LT |
2181 | else |
2182 | adsize = 0; | |
2183 | ||
ff116fc8 JK |
2184 | oepos = epos; |
2185 | if (udf_next_aext(inode, &epos, &eloc, &elen, 1) == -1) | |
1da177e4 LT |
2186 | return -1; |
2187 | ||
cb00ea35 | 2188 | while ((etype = udf_next_aext(inode, &epos, &eloc, &elen, 1)) != -1) { |
97e961fd | 2189 | udf_write_aext(inode, &oepos, &eloc, (etype << 30) | elen, 1); |
cb00ea35 | 2190 | if (oepos.bh != epos.bh) { |
ff116fc8 | 2191 | oepos.block = epos.block; |
3bf25cb4 JK |
2192 | brelse(oepos.bh); |
2193 | get_bh(epos.bh); | |
ff116fc8 JK |
2194 | oepos.bh = epos.bh; |
2195 | oepos.offset = epos.offset - adsize; | |
1da177e4 LT |
2196 | } |
2197 | } | |
5ca4e4be | 2198 | memset(&eloc, 0x00, sizeof(struct kernel_lb_addr)); |
1da177e4 LT |
2199 | elen = 0; |
2200 | ||
cb00ea35 | 2201 | if (epos.bh != oepos.bh) { |
97e961fd PE |
2202 | udf_free_blocks(inode->i_sb, inode, &epos.block, 0, 1); |
2203 | udf_write_aext(inode, &oepos, &eloc, elen, 1); | |
2204 | udf_write_aext(inode, &oepos, &eloc, elen, 1); | |
cb00ea35 | 2205 | if (!oepos.bh) { |
48d6d8ff | 2206 | iinfo->i_lenAlloc -= (adsize * 2); |
1da177e4 | 2207 | mark_inode_dirty(inode); |
cb00ea35 | 2208 | } else { |
ff116fc8 | 2209 | aed = (struct allocExtDesc *)oepos.bh->b_data; |
c2104fda | 2210 | le32_add_cpu(&aed->lengthAllocDescs, -(2 * adsize)); |
28de7948 | 2211 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
6c79e987 | 2212 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) |
4b11111a MS |
2213 | udf_update_tag(oepos.bh->b_data, |
2214 | oepos.offset - (2 * adsize)); | |
1da177e4 | 2215 | else |
4b11111a MS |
2216 | udf_update_tag(oepos.bh->b_data, |
2217 | sizeof(struct allocExtDesc)); | |
ff116fc8 | 2218 | mark_buffer_dirty_inode(oepos.bh, inode); |
1da177e4 | 2219 | } |
cb00ea35 | 2220 | } else { |
97e961fd | 2221 | udf_write_aext(inode, &oepos, &eloc, elen, 1); |
cb00ea35 | 2222 | if (!oepos.bh) { |
48d6d8ff | 2223 | iinfo->i_lenAlloc -= adsize; |
1da177e4 | 2224 | mark_inode_dirty(inode); |
cb00ea35 | 2225 | } else { |
ff116fc8 | 2226 | aed = (struct allocExtDesc *)oepos.bh->b_data; |
c2104fda | 2227 | le32_add_cpu(&aed->lengthAllocDescs, -adsize); |
28de7948 | 2228 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
6c79e987 | 2229 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) |
4b11111a MS |
2230 | udf_update_tag(oepos.bh->b_data, |
2231 | epos.offset - adsize); | |
1da177e4 | 2232 | else |
4b11111a MS |
2233 | udf_update_tag(oepos.bh->b_data, |
2234 | sizeof(struct allocExtDesc)); | |
ff116fc8 | 2235 | mark_buffer_dirty_inode(oepos.bh, inode); |
1da177e4 LT |
2236 | } |
2237 | } | |
647bd61a | 2238 | |
3bf25cb4 JK |
2239 | brelse(epos.bh); |
2240 | brelse(oepos.bh); | |
28de7948 | 2241 | |
1da177e4 LT |
2242 | return (elen >> 30); |
2243 | } | |
2244 | ||
4b11111a | 2245 | int8_t inode_bmap(struct inode *inode, sector_t block, |
5ca4e4be | 2246 | struct extent_position *pos, struct kernel_lb_addr *eloc, |
4b11111a | 2247 | uint32_t *elen, sector_t *offset) |
1da177e4 | 2248 | { |
4b11111a | 2249 | unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; |
cb00ea35 | 2250 | loff_t lbcount = 0, bcount = |
4b11111a | 2251 | (loff_t) block << blocksize_bits; |
1da177e4 | 2252 | int8_t etype; |
48d6d8ff | 2253 | struct udf_inode_info *iinfo; |
1da177e4 | 2254 | |
48d6d8ff | 2255 | iinfo = UDF_I(inode); |
99600051 NJ |
2256 | if (!udf_read_extent_cache(inode, bcount, &lbcount, pos)) { |
2257 | pos->offset = 0; | |
2258 | pos->block = iinfo->i_location; | |
2259 | pos->bh = NULL; | |
2260 | } | |
1da177e4 | 2261 | *elen = 0; |
cb00ea35 | 2262 | do { |
4b11111a MS |
2263 | etype = udf_next_aext(inode, pos, eloc, elen, 1); |
2264 | if (etype == -1) { | |
2265 | *offset = (bcount - lbcount) >> blocksize_bits; | |
48d6d8ff | 2266 | iinfo->i_lenExtents = lbcount; |
1da177e4 LT |
2267 | return -1; |
2268 | } | |
2269 | lbcount += *elen; | |
2270 | } while (lbcount <= bcount); | |
99600051 NJ |
2271 | /* update extent cache */ |
2272 | udf_update_extent_cache(inode, lbcount - *elen, pos, 1); | |
4b11111a | 2273 | *offset = (bcount + *elen - lbcount) >> blocksize_bits; |
1da177e4 LT |
2274 | |
2275 | return etype; | |
2276 | } | |
2277 | ||
60448b1d | 2278 | long udf_block_map(struct inode *inode, sector_t block) |
1da177e4 | 2279 | { |
5ca4e4be | 2280 | struct kernel_lb_addr eloc; |
ff116fc8 | 2281 | uint32_t elen; |
60448b1d | 2282 | sector_t offset; |
28de7948 | 2283 | struct extent_position epos = {}; |
1da177e4 LT |
2284 | int ret; |
2285 | ||
4d0fb621 | 2286 | down_read(&UDF_I(inode)->i_data_sem); |
1da177e4 | 2287 | |
4b11111a MS |
2288 | if (inode_bmap(inode, block, &epos, &eloc, &elen, &offset) == |
2289 | (EXT_RECORDED_ALLOCATED >> 30)) | |
97e961fd | 2290 | ret = udf_get_lb_pblock(inode->i_sb, &eloc, offset); |
1da177e4 LT |
2291 | else |
2292 | ret = 0; | |
2293 | ||
4d0fb621 | 2294 | up_read(&UDF_I(inode)->i_data_sem); |
3bf25cb4 | 2295 | brelse(epos.bh); |
1da177e4 LT |
2296 | |
2297 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_VARCONV)) | |
2298 | return udf_fixed_to_variable(ret); | |
2299 | else | |
2300 | return ret; | |
2301 | } |