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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * inode.c | |
3 | * | |
4 | * PURPOSE | |
5 | * Inode handling routines for the OSTA-UDF(tm) filesystem. | |
6 | * | |
1da177e4 LT |
7 | * COPYRIGHT |
8 | * This file is distributed under the terms of the GNU General Public | |
9 | * License (GPL). Copies of the GPL can be obtained from: | |
10 | * ftp://prep.ai.mit.edu/pub/gnu/GPL | |
11 | * Each contributing author retains all rights to their own work. | |
12 | * | |
13 | * (C) 1998 Dave Boynton | |
14 | * (C) 1998-2004 Ben Fennema | |
15 | * (C) 1999-2000 Stelias Computing Inc | |
16 | * | |
17 | * HISTORY | |
18 | * | |
19 | * 10/04/98 dgb Added rudimentary directory functions | |
20 | * 10/07/98 Fully working udf_block_map! It works! | |
21 | * 11/25/98 bmap altered to better support extents | |
4b11111a MS |
22 | * 12/06/98 blf partition support in udf_iget, udf_block_map |
23 | * and udf_read_inode | |
1da177e4 LT |
24 | * 12/12/98 rewrote udf_block_map to handle next extents and descs across |
25 | * block boundaries (which is not actually allowed) | |
26 | * 12/20/98 added support for strategy 4096 | |
27 | * 03/07/99 rewrote udf_block_map (again) | |
28 | * New funcs, inode_bmap, udf_next_aext | |
29 | * 04/19/99 Support for writing device EA's for major/minor # | |
30 | */ | |
31 | ||
32 | #include "udfdecl.h" | |
33 | #include <linux/mm.h> | |
34 | #include <linux/smp_lock.h> | |
35 | #include <linux/module.h> | |
36 | #include <linux/pagemap.h> | |
37 | #include <linux/buffer_head.h> | |
38 | #include <linux/writeback.h> | |
39 | #include <linux/slab.h> | |
f845fced | 40 | #include <linux/crc-itu-t.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 | ||
51 | static mode_t udf_convert_permissions(struct fileEntry *); | |
52 | static int udf_update_inode(struct inode *, int); | |
53 | static void udf_fill_inode(struct inode *, struct buffer_head *); | |
647bd61a | 54 | static int udf_alloc_i_data(struct inode *inode, size_t size); |
60448b1d | 55 | static struct buffer_head *inode_getblk(struct inode *, sector_t, int *, |
1ed16171 | 56 | sector_t *, int *); |
ff116fc8 | 57 | static int8_t udf_insert_aext(struct inode *, struct extent_position, |
cb00ea35 | 58 | kernel_lb_addr, uint32_t); |
1da177e4 | 59 | static void udf_split_extents(struct inode *, int *, int, int, |
cb00ea35 | 60 | kernel_long_ad[EXTENT_MERGE_SIZE], int *); |
1da177e4 | 61 | static void udf_prealloc_extents(struct inode *, int, int, |
cb00ea35 | 62 | kernel_long_ad[EXTENT_MERGE_SIZE], int *); |
1da177e4 | 63 | static void udf_merge_extents(struct inode *, |
cb00ea35 | 64 | kernel_long_ad[EXTENT_MERGE_SIZE], int *); |
1da177e4 | 65 | static void udf_update_extents(struct inode *, |
cb00ea35 CG |
66 | kernel_long_ad[EXTENT_MERGE_SIZE], int, int, |
67 | struct extent_position *); | |
1da177e4 LT |
68 | static int udf_get_block(struct inode *, sector_t, struct buffer_head *, int); |
69 | ||
b1e32126 | 70 | |
cb00ea35 | 71 | void udf_delete_inode(struct inode *inode) |
1da177e4 | 72 | { |
fef26658 MF |
73 | truncate_inode_pages(&inode->i_data, 0); |
74 | ||
1da177e4 LT |
75 | if (is_bad_inode(inode)) |
76 | goto no_delete; | |
77 | ||
78 | inode->i_size = 0; | |
79 | udf_truncate(inode); | |
80 | lock_kernel(); | |
81 | ||
82 | udf_update_inode(inode, IS_SYNC(inode)); | |
83 | udf_free_inode(inode); | |
84 | ||
85 | unlock_kernel(); | |
86 | return; | |
28de7948 CG |
87 | |
88 | no_delete: | |
1da177e4 LT |
89 | clear_inode(inode); |
90 | } | |
91 | ||
74584ae5 JK |
92 | /* |
93 | * If we are going to release inode from memory, we discard preallocation and | |
94 | * truncate last inode extent to proper length. We could use drop_inode() but | |
95 | * it's called under inode_lock and thus we cannot mark inode dirty there. We | |
96 | * use clear_inode() but we have to make sure to write inode as it's not written | |
97 | * automatically. | |
98 | */ | |
1da177e4 LT |
99 | void udf_clear_inode(struct inode *inode) |
100 | { | |
48d6d8ff | 101 | struct udf_inode_info *iinfo; |
1da177e4 LT |
102 | if (!(inode->i_sb->s_flags & MS_RDONLY)) { |
103 | lock_kernel(); | |
74584ae5 | 104 | /* Discard preallocation for directories, symlinks, etc. */ |
1da177e4 | 105 | udf_discard_prealloc(inode); |
74584ae5 | 106 | udf_truncate_tail_extent(inode); |
1da177e4 | 107 | unlock_kernel(); |
32a8f24d | 108 | write_inode_now(inode, 0); |
1da177e4 | 109 | } |
48d6d8ff MS |
110 | iinfo = UDF_I(inode); |
111 | kfree(iinfo->i_ext.i_data); | |
112 | iinfo->i_ext.i_data = NULL; | |
1da177e4 LT |
113 | } |
114 | ||
115 | static int udf_writepage(struct page *page, struct writeback_control *wbc) | |
116 | { | |
117 | return block_write_full_page(page, udf_get_block, wbc); | |
118 | } | |
119 | ||
120 | static int udf_readpage(struct file *file, struct page *page) | |
121 | { | |
122 | return block_read_full_page(page, udf_get_block); | |
123 | } | |
124 | ||
be021ee4 NP |
125 | static int udf_write_begin(struct file *file, struct address_space *mapping, |
126 | loff_t pos, unsigned len, unsigned flags, | |
127 | struct page **pagep, void **fsdata) | |
1da177e4 | 128 | { |
be021ee4 NP |
129 | *pagep = NULL; |
130 | return block_write_begin(file, mapping, pos, len, flags, pagep, fsdata, | |
131 | udf_get_block); | |
1da177e4 LT |
132 | } |
133 | ||
134 | static sector_t udf_bmap(struct address_space *mapping, sector_t block) | |
135 | { | |
cb00ea35 | 136 | return generic_block_bmap(mapping, block, udf_get_block); |
1da177e4 LT |
137 | } |
138 | ||
f5e54d6e | 139 | const struct address_space_operations udf_aops = { |
28de7948 CG |
140 | .readpage = udf_readpage, |
141 | .writepage = udf_writepage, | |
142 | .sync_page = block_sync_page, | |
be021ee4 NP |
143 | .write_begin = udf_write_begin, |
144 | .write_end = generic_write_end, | |
28de7948 | 145 | .bmap = udf_bmap, |
1da177e4 LT |
146 | }; |
147 | ||
cb00ea35 | 148 | void udf_expand_file_adinicb(struct inode *inode, int newsize, int *err) |
1da177e4 LT |
149 | { |
150 | struct page *page; | |
151 | char *kaddr; | |
48d6d8ff | 152 | struct udf_inode_info *iinfo = UDF_I(inode); |
1da177e4 LT |
153 | struct writeback_control udf_wbc = { |
154 | .sync_mode = WB_SYNC_NONE, | |
155 | .nr_to_write = 1, | |
156 | }; | |
157 | ||
158 | /* from now on we have normal address_space methods */ | |
159 | inode->i_data.a_ops = &udf_aops; | |
160 | ||
48d6d8ff | 161 | if (!iinfo->i_lenAlloc) { |
1da177e4 | 162 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) |
48d6d8ff | 163 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT; |
1da177e4 | 164 | else |
48d6d8ff | 165 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG; |
1da177e4 LT |
166 | mark_inode_dirty(inode); |
167 | return; | |
168 | } | |
169 | ||
170 | page = grab_cache_page(inode->i_mapping, 0); | |
cd7619d6 MM |
171 | BUG_ON(!PageLocked(page)); |
172 | ||
cb00ea35 | 173 | if (!PageUptodate(page)) { |
1da177e4 | 174 | kaddr = kmap(page); |
48d6d8ff MS |
175 | memset(kaddr + iinfo->i_lenAlloc, 0x00, |
176 | PAGE_CACHE_SIZE - iinfo->i_lenAlloc); | |
177 | memcpy(kaddr, iinfo->i_ext.i_data + iinfo->i_lenEAttr, | |
178 | iinfo->i_lenAlloc); | |
1da177e4 LT |
179 | flush_dcache_page(page); |
180 | SetPageUptodate(page); | |
181 | kunmap(page); | |
182 | } | |
48d6d8ff MS |
183 | memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr, 0x00, |
184 | iinfo->i_lenAlloc); | |
185 | iinfo->i_lenAlloc = 0; | |
1da177e4 | 186 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) |
48d6d8ff | 187 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT; |
1da177e4 | 188 | else |
48d6d8ff | 189 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG; |
1da177e4 LT |
190 | |
191 | inode->i_data.a_ops->writepage(page, &udf_wbc); | |
192 | page_cache_release(page); | |
193 | ||
194 | mark_inode_dirty(inode); | |
195 | } | |
196 | ||
cb00ea35 CG |
197 | struct buffer_head *udf_expand_dir_adinicb(struct inode *inode, int *block, |
198 | int *err) | |
1da177e4 LT |
199 | { |
200 | int newblock; | |
ff116fc8 JK |
201 | struct buffer_head *dbh = NULL; |
202 | kernel_lb_addr eloc; | |
203 | uint32_t elen; | |
1da177e4 | 204 | uint8_t alloctype; |
ff116fc8 | 205 | struct extent_position epos; |
1da177e4 LT |
206 | |
207 | struct udf_fileident_bh sfibh, dfibh; | |
af793295 JK |
208 | loff_t f_pos = udf_ext0_offset(inode); |
209 | int size = udf_ext0_offset(inode) + inode->i_size; | |
1da177e4 | 210 | struct fileIdentDesc cfi, *sfi, *dfi; |
48d6d8ff | 211 | struct udf_inode_info *iinfo = UDF_I(inode); |
1da177e4 LT |
212 | |
213 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) | |
214 | alloctype = ICBTAG_FLAG_AD_SHORT; | |
215 | else | |
216 | alloctype = ICBTAG_FLAG_AD_LONG; | |
217 | ||
cb00ea35 | 218 | if (!inode->i_size) { |
48d6d8ff | 219 | iinfo->i_alloc_type = alloctype; |
1da177e4 LT |
220 | mark_inode_dirty(inode); |
221 | return NULL; | |
222 | } | |
223 | ||
224 | /* alloc block, and copy data to it */ | |
225 | *block = udf_new_block(inode->i_sb, inode, | |
48d6d8ff MS |
226 | iinfo->i_location.partitionReferenceNum, |
227 | iinfo->i_location.logicalBlockNum, err); | |
1da177e4 LT |
228 | if (!(*block)) |
229 | return NULL; | |
230 | newblock = udf_get_pblock(inode->i_sb, *block, | |
48d6d8ff | 231 | iinfo->i_location.partitionReferenceNum, |
c0b34438 | 232 | 0); |
1da177e4 LT |
233 | if (!newblock) |
234 | return NULL; | |
235 | dbh = udf_tgetblk(inode->i_sb, newblock); | |
236 | if (!dbh) | |
237 | return NULL; | |
238 | lock_buffer(dbh); | |
239 | memset(dbh->b_data, 0x00, inode->i_sb->s_blocksize); | |
240 | set_buffer_uptodate(dbh); | |
241 | unlock_buffer(dbh); | |
242 | mark_buffer_dirty_inode(dbh, inode); | |
243 | ||
4b11111a | 244 | sfibh.soffset = sfibh.eoffset = |
af793295 | 245 | f_pos & (inode->i_sb->s_blocksize - 1); |
ff116fc8 | 246 | sfibh.sbh = sfibh.ebh = NULL; |
1da177e4 LT |
247 | dfibh.soffset = dfibh.eoffset = 0; |
248 | dfibh.sbh = dfibh.ebh = dbh; | |
af793295 | 249 | while (f_pos < size) { |
48d6d8ff | 250 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB; |
4b11111a MS |
251 | sfi = udf_fileident_read(inode, &f_pos, &sfibh, &cfi, NULL, |
252 | NULL, NULL, NULL); | |
cb00ea35 | 253 | if (!sfi) { |
3bf25cb4 | 254 | brelse(dbh); |
1da177e4 LT |
255 | return NULL; |
256 | } | |
48d6d8ff | 257 | iinfo->i_alloc_type = alloctype; |
1da177e4 LT |
258 | sfi->descTag.tagLocation = cpu_to_le32(*block); |
259 | dfibh.soffset = dfibh.eoffset; | |
260 | dfibh.eoffset += (sfibh.eoffset - sfibh.soffset); | |
261 | dfi = (struct fileIdentDesc *)(dbh->b_data + dfibh.soffset); | |
262 | if (udf_write_fi(inode, sfi, dfi, &dfibh, sfi->impUse, | |
4b11111a MS |
263 | sfi->fileIdent + |
264 | le16_to_cpu(sfi->lengthOfImpUse))) { | |
48d6d8ff | 265 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB; |
3bf25cb4 | 266 | brelse(dbh); |
1da177e4 LT |
267 | return NULL; |
268 | } | |
269 | } | |
270 | mark_buffer_dirty_inode(dbh, inode); | |
271 | ||
48d6d8ff MS |
272 | memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr, 0, |
273 | iinfo->i_lenAlloc); | |
274 | iinfo->i_lenAlloc = 0; | |
1da177e4 | 275 | eloc.logicalBlockNum = *block; |
4b11111a | 276 | eloc.partitionReferenceNum = |
48d6d8ff | 277 | iinfo->i_location.partitionReferenceNum; |
05343c4f | 278 | elen = inode->i_sb->s_blocksize; |
48d6d8ff | 279 | iinfo->i_lenExtents = elen; |
ff116fc8 | 280 | epos.bh = NULL; |
48d6d8ff | 281 | epos.block = iinfo->i_location; |
ff116fc8 JK |
282 | epos.offset = udf_file_entry_alloc_offset(inode); |
283 | udf_add_aext(inode, &epos, eloc, elen, 0); | |
1da177e4 LT |
284 | /* UniqueID stuff */ |
285 | ||
3bf25cb4 | 286 | brelse(epos.bh); |
1da177e4 LT |
287 | mark_inode_dirty(inode); |
288 | return dbh; | |
289 | } | |
290 | ||
cb00ea35 CG |
291 | static int udf_get_block(struct inode *inode, sector_t block, |
292 | struct buffer_head *bh_result, int create) | |
1da177e4 LT |
293 | { |
294 | int err, new; | |
295 | struct buffer_head *bh; | |
1ed16171 | 296 | sector_t phys = 0; |
48d6d8ff | 297 | struct udf_inode_info *iinfo; |
1da177e4 | 298 | |
cb00ea35 | 299 | if (!create) { |
1da177e4 LT |
300 | phys = udf_block_map(inode, block); |
301 | if (phys) | |
302 | map_bh(bh_result, inode->i_sb, phys); | |
303 | return 0; | |
304 | } | |
305 | ||
306 | err = -EIO; | |
307 | new = 0; | |
308 | bh = NULL; | |
309 | ||
310 | lock_kernel(); | |
311 | ||
48d6d8ff MS |
312 | iinfo = UDF_I(inode); |
313 | if (block == iinfo->i_next_alloc_block + 1) { | |
314 | iinfo->i_next_alloc_block++; | |
315 | iinfo->i_next_alloc_goal++; | |
1da177e4 LT |
316 | } |
317 | ||
318 | err = 0; | |
319 | ||
320 | bh = inode_getblk(inode, block, &err, &phys, &new); | |
2c2111c2 | 321 | BUG_ON(bh); |
1da177e4 LT |
322 | if (err) |
323 | goto abort; | |
2c2111c2 | 324 | BUG_ON(!phys); |
1da177e4 LT |
325 | |
326 | if (new) | |
327 | set_buffer_new(bh_result); | |
328 | map_bh(bh_result, inode->i_sb, phys); | |
28de7948 CG |
329 | |
330 | abort: | |
1da177e4 LT |
331 | unlock_kernel(); |
332 | return err; | |
1da177e4 LT |
333 | } |
334 | ||
cb00ea35 CG |
335 | static struct buffer_head *udf_getblk(struct inode *inode, long block, |
336 | int create, int *err) | |
1da177e4 | 337 | { |
28de7948 | 338 | struct buffer_head *bh; |
1da177e4 LT |
339 | struct buffer_head dummy; |
340 | ||
341 | dummy.b_state = 0; | |
342 | dummy.b_blocknr = -1000; | |
343 | *err = udf_get_block(inode, block, &dummy, create); | |
cb00ea35 | 344 | if (!*err && buffer_mapped(&dummy)) { |
1da177e4 | 345 | bh = sb_getblk(inode->i_sb, dummy.b_blocknr); |
cb00ea35 | 346 | if (buffer_new(&dummy)) { |
1da177e4 LT |
347 | lock_buffer(bh); |
348 | memset(bh->b_data, 0x00, inode->i_sb->s_blocksize); | |
349 | set_buffer_uptodate(bh); | |
350 | unlock_buffer(bh); | |
351 | mark_buffer_dirty_inode(bh, inode); | |
352 | } | |
353 | return bh; | |
354 | } | |
28de7948 | 355 | |
1da177e4 LT |
356 | return NULL; |
357 | } | |
358 | ||
31170b6a JK |
359 | /* Extend the file by 'blocks' blocks, return the number of extents added */ |
360 | int udf_extend_file(struct inode *inode, struct extent_position *last_pos, | |
4b11111a | 361 | kernel_long_ad *last_ext, sector_t blocks) |
31170b6a JK |
362 | { |
363 | sector_t add; | |
364 | int count = 0, fake = !(last_ext->extLength & UDF_EXTENT_LENGTH_MASK); | |
365 | struct super_block *sb = inode->i_sb; | |
28de7948 | 366 | kernel_lb_addr prealloc_loc = {}; |
31170b6a | 367 | int prealloc_len = 0; |
48d6d8ff | 368 | struct udf_inode_info *iinfo; |
31170b6a JK |
369 | |
370 | /* The previous extent is fake and we should not extend by anything | |
371 | * - there's nothing to do... */ | |
372 | if (!blocks && fake) | |
373 | return 0; | |
28de7948 | 374 | |
48d6d8ff | 375 | iinfo = UDF_I(inode); |
31170b6a JK |
376 | /* Round the last extent up to a multiple of block size */ |
377 | if (last_ext->extLength & (sb->s_blocksize - 1)) { | |
378 | last_ext->extLength = | |
28de7948 CG |
379 | (last_ext->extLength & UDF_EXTENT_FLAG_MASK) | |
380 | (((last_ext->extLength & UDF_EXTENT_LENGTH_MASK) + | |
381 | sb->s_blocksize - 1) & ~(sb->s_blocksize - 1)); | |
48d6d8ff MS |
382 | iinfo->i_lenExtents = |
383 | (iinfo->i_lenExtents + sb->s_blocksize - 1) & | |
28de7948 | 384 | ~(sb->s_blocksize - 1); |
31170b6a | 385 | } |
28de7948 | 386 | |
31170b6a | 387 | /* Last extent are just preallocated blocks? */ |
4b11111a MS |
388 | if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) == |
389 | EXT_NOT_RECORDED_ALLOCATED) { | |
31170b6a JK |
390 | /* Save the extent so that we can reattach it to the end */ |
391 | prealloc_loc = last_ext->extLocation; | |
392 | prealloc_len = last_ext->extLength; | |
393 | /* Mark the extent as a hole */ | |
394 | last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | | |
28de7948 | 395 | (last_ext->extLength & UDF_EXTENT_LENGTH_MASK); |
31170b6a | 396 | last_ext->extLocation.logicalBlockNum = 0; |
4b11111a | 397 | last_ext->extLocation.partitionReferenceNum = 0; |
31170b6a | 398 | } |
28de7948 | 399 | |
31170b6a | 400 | /* Can we merge with the previous extent? */ |
4b11111a MS |
401 | if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) == |
402 | EXT_NOT_RECORDED_NOT_ALLOCATED) { | |
403 | add = ((1 << 30) - sb->s_blocksize - | |
404 | (last_ext->extLength & UDF_EXTENT_LENGTH_MASK)) >> | |
405 | sb->s_blocksize_bits; | |
31170b6a JK |
406 | if (add > blocks) |
407 | add = blocks; | |
408 | blocks -= add; | |
409 | last_ext->extLength += add << sb->s_blocksize_bits; | |
410 | } | |
411 | ||
412 | if (fake) { | |
413 | udf_add_aext(inode, last_pos, last_ext->extLocation, | |
cb00ea35 | 414 | last_ext->extLength, 1); |
31170b6a | 415 | count++; |
4b11111a MS |
416 | } else |
417 | udf_write_aext(inode, last_pos, last_ext->extLocation, | |
418 | last_ext->extLength, 1); | |
28de7948 | 419 | |
31170b6a JK |
420 | /* Managed to do everything necessary? */ |
421 | if (!blocks) | |
422 | goto out; | |
423 | ||
424 | /* All further extents will be NOT_RECORDED_NOT_ALLOCATED */ | |
425 | last_ext->extLocation.logicalBlockNum = 0; | |
4b11111a | 426 | last_ext->extLocation.partitionReferenceNum = 0; |
28de7948 | 427 | add = (1 << (30-sb->s_blocksize_bits)) - 1; |
4b11111a MS |
428 | last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | |
429 | (add << sb->s_blocksize_bits); | |
28de7948 | 430 | |
31170b6a JK |
431 | /* Create enough extents to cover the whole hole */ |
432 | while (blocks > add) { | |
433 | blocks -= add; | |
434 | if (udf_add_aext(inode, last_pos, last_ext->extLocation, | |
cb00ea35 | 435 | last_ext->extLength, 1) == -1) |
31170b6a JK |
436 | return -1; |
437 | count++; | |
438 | } | |
439 | if (blocks) { | |
440 | last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | | |
28de7948 | 441 | (blocks << sb->s_blocksize_bits); |
31170b6a | 442 | if (udf_add_aext(inode, last_pos, last_ext->extLocation, |
cb00ea35 | 443 | last_ext->extLength, 1) == -1) |
31170b6a JK |
444 | return -1; |
445 | count++; | |
446 | } | |
28de7948 CG |
447 | |
448 | out: | |
31170b6a JK |
449 | /* Do we have some preallocated blocks saved? */ |
450 | if (prealloc_len) { | |
4b11111a MS |
451 | if (udf_add_aext(inode, last_pos, prealloc_loc, |
452 | prealloc_len, 1) == -1) | |
31170b6a JK |
453 | return -1; |
454 | last_ext->extLocation = prealloc_loc; | |
455 | last_ext->extLength = prealloc_len; | |
456 | count++; | |
457 | } | |
28de7948 | 458 | |
31170b6a | 459 | /* last_pos should point to the last written extent... */ |
48d6d8ff | 460 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
31170b6a | 461 | last_pos->offset -= sizeof(short_ad); |
48d6d8ff | 462 | else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
31170b6a JK |
463 | last_pos->offset -= sizeof(long_ad); |
464 | else | |
465 | return -1; | |
28de7948 | 466 | |
31170b6a JK |
467 | return count; |
468 | } | |
469 | ||
cb00ea35 | 470 | static struct buffer_head *inode_getblk(struct inode *inode, sector_t block, |
1ed16171 | 471 | int *err, sector_t *phys, int *new) |
1da177e4 | 472 | { |
31170b6a | 473 | static sector_t last_block; |
ff116fc8 | 474 | struct buffer_head *result = NULL; |
1da177e4 | 475 | kernel_long_ad laarr[EXTENT_MERGE_SIZE]; |
ff116fc8 | 476 | struct extent_position prev_epos, cur_epos, next_epos; |
1da177e4 | 477 | int count = 0, startnum = 0, endnum = 0; |
85d71244 JK |
478 | uint32_t elen = 0, tmpelen; |
479 | kernel_lb_addr eloc, tmpeloc; | |
1da177e4 | 480 | int c = 1; |
60448b1d JK |
481 | loff_t lbcount = 0, b_off = 0; |
482 | uint32_t newblocknum, newblock; | |
483 | sector_t offset = 0; | |
1da177e4 | 484 | int8_t etype; |
48d6d8ff MS |
485 | struct udf_inode_info *iinfo = UDF_I(inode); |
486 | int goal = 0, pgoal = iinfo->i_location.logicalBlockNum; | |
31170b6a | 487 | int lastblock = 0; |
1da177e4 | 488 | |
ff116fc8 | 489 | prev_epos.offset = udf_file_entry_alloc_offset(inode); |
48d6d8ff | 490 | prev_epos.block = iinfo->i_location; |
ff116fc8 JK |
491 | prev_epos.bh = NULL; |
492 | cur_epos = next_epos = prev_epos; | |
28de7948 | 493 | b_off = (loff_t)block << inode->i_sb->s_blocksize_bits; |
1da177e4 LT |
494 | |
495 | /* find the extent which contains the block we are looking for. | |
cb00ea35 CG |
496 | alternate between laarr[0] and laarr[1] for locations of the |
497 | current extent, and the previous extent */ | |
498 | do { | |
499 | if (prev_epos.bh != cur_epos.bh) { | |
3bf25cb4 JK |
500 | brelse(prev_epos.bh); |
501 | get_bh(cur_epos.bh); | |
ff116fc8 | 502 | prev_epos.bh = cur_epos.bh; |
1da177e4 | 503 | } |
cb00ea35 | 504 | if (cur_epos.bh != next_epos.bh) { |
3bf25cb4 JK |
505 | brelse(cur_epos.bh); |
506 | get_bh(next_epos.bh); | |
ff116fc8 | 507 | cur_epos.bh = next_epos.bh; |
1da177e4 LT |
508 | } |
509 | ||
510 | lbcount += elen; | |
511 | ||
ff116fc8 JK |
512 | prev_epos.block = cur_epos.block; |
513 | cur_epos.block = next_epos.block; | |
1da177e4 | 514 | |
ff116fc8 JK |
515 | prev_epos.offset = cur_epos.offset; |
516 | cur_epos.offset = next_epos.offset; | |
1da177e4 | 517 | |
4b11111a MS |
518 | etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 1); |
519 | if (etype == -1) | |
1da177e4 LT |
520 | break; |
521 | ||
522 | c = !c; | |
523 | ||
524 | laarr[c].extLength = (etype << 30) | elen; | |
525 | laarr[c].extLocation = eloc; | |
526 | ||
527 | if (etype != (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) | |
528 | pgoal = eloc.logicalBlockNum + | |
28de7948 CG |
529 | ((elen + inode->i_sb->s_blocksize - 1) >> |
530 | inode->i_sb->s_blocksize_bits); | |
1da177e4 | 531 | |
cb00ea35 | 532 | count++; |
1da177e4 LT |
533 | } while (lbcount + elen <= b_off); |
534 | ||
535 | b_off -= lbcount; | |
536 | offset = b_off >> inode->i_sb->s_blocksize_bits; | |
85d71244 JK |
537 | /* |
538 | * Move prev_epos and cur_epos into indirect extent if we are at | |
539 | * the pointer to it | |
540 | */ | |
541 | udf_next_aext(inode, &prev_epos, &tmpeloc, &tmpelen, 0); | |
542 | udf_next_aext(inode, &cur_epos, &tmpeloc, &tmpelen, 0); | |
1da177e4 LT |
543 | |
544 | /* if the extent is allocated and recorded, return the block | |
cb00ea35 | 545 | if the extent is not a multiple of the blocksize, round up */ |
1da177e4 | 546 | |
cb00ea35 CG |
547 | if (etype == (EXT_RECORDED_ALLOCATED >> 30)) { |
548 | if (elen & (inode->i_sb->s_blocksize - 1)) { | |
1da177e4 | 549 | elen = EXT_RECORDED_ALLOCATED | |
28de7948 CG |
550 | ((elen + inode->i_sb->s_blocksize - 1) & |
551 | ~(inode->i_sb->s_blocksize - 1)); | |
ff116fc8 | 552 | etype = udf_write_aext(inode, &cur_epos, eloc, elen, 1); |
1da177e4 | 553 | } |
3bf25cb4 JK |
554 | brelse(prev_epos.bh); |
555 | brelse(cur_epos.bh); | |
556 | brelse(next_epos.bh); | |
1da177e4 LT |
557 | newblock = udf_get_lb_pblock(inode->i_sb, eloc, offset); |
558 | *phys = newblock; | |
559 | return NULL; | |
560 | } | |
561 | ||
31170b6a JK |
562 | last_block = block; |
563 | /* Are we beyond EOF? */ | |
cb00ea35 | 564 | if (etype == -1) { |
31170b6a JK |
565 | int ret; |
566 | ||
567 | if (count) { | |
568 | if (c) | |
569 | laarr[0] = laarr[1]; | |
570 | startnum = 1; | |
cb00ea35 | 571 | } else { |
31170b6a | 572 | /* Create a fake extent when there's not one */ |
4b11111a MS |
573 | memset(&laarr[0].extLocation, 0x00, |
574 | sizeof(kernel_lb_addr)); | |
31170b6a | 575 | laarr[0].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED; |
4b11111a MS |
576 | /* Will udf_extend_file() create real extent from |
577 | a fake one? */ | |
31170b6a JK |
578 | startnum = (offset > 0); |
579 | } | |
580 | /* Create extents for the hole between EOF and offset */ | |
581 | ret = udf_extend_file(inode, &prev_epos, laarr, offset); | |
582 | if (ret == -1) { | |
583 | brelse(prev_epos.bh); | |
584 | brelse(cur_epos.bh); | |
585 | brelse(next_epos.bh); | |
586 | /* We don't really know the error here so we just make | |
587 | * something up */ | |
588 | *err = -ENOSPC; | |
589 | return NULL; | |
590 | } | |
591 | c = 0; | |
592 | offset = 0; | |
593 | count += ret; | |
594 | /* We are not covered by a preallocated extent? */ | |
4b11111a MS |
595 | if ((laarr[0].extLength & UDF_EXTENT_FLAG_MASK) != |
596 | EXT_NOT_RECORDED_ALLOCATED) { | |
31170b6a JK |
597 | /* Is there any real extent? - otherwise we overwrite |
598 | * the fake one... */ | |
599 | if (count) | |
600 | c = !c; | |
601 | laarr[c].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | | |
28de7948 | 602 | inode->i_sb->s_blocksize; |
4b11111a MS |
603 | memset(&laarr[c].extLocation, 0x00, |
604 | sizeof(kernel_lb_addr)); | |
cb00ea35 CG |
605 | count++; |
606 | endnum++; | |
31170b6a | 607 | } |
cb00ea35 | 608 | endnum = c + 1; |
1da177e4 | 609 | lastblock = 1; |
cb00ea35 | 610 | } else { |
1da177e4 LT |
611 | endnum = startnum = ((count > 2) ? 2 : count); |
612 | ||
4b11111a MS |
613 | /* if the current extent is in position 0, |
614 | swap it with the previous */ | |
cb00ea35 | 615 | if (!c && count != 1) { |
31170b6a JK |
616 | laarr[2] = laarr[0]; |
617 | laarr[0] = laarr[1]; | |
618 | laarr[1] = laarr[2]; | |
619 | c = 1; | |
620 | } | |
1da177e4 | 621 | |
4b11111a MS |
622 | /* if the current block is located in an extent, |
623 | read the next extent */ | |
624 | etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 0); | |
625 | if (etype != -1) { | |
cb00ea35 CG |
626 | laarr[c + 1].extLength = (etype << 30) | elen; |
627 | laarr[c + 1].extLocation = eloc; | |
628 | count++; | |
629 | startnum++; | |
630 | endnum++; | |
4b11111a | 631 | } else |
1da177e4 LT |
632 | lastblock = 1; |
633 | } | |
1da177e4 LT |
634 | |
635 | /* if the current extent is not recorded but allocated, get the | |
28de7948 | 636 | * block in the extent corresponding to the requested block */ |
4b11111a | 637 | if ((laarr[c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30)) |
1da177e4 | 638 | newblocknum = laarr[c].extLocation.logicalBlockNum + offset; |
4b11111a | 639 | else { /* otherwise, allocate a new block */ |
48d6d8ff MS |
640 | if (iinfo->i_next_alloc_block == block) |
641 | goal = iinfo->i_next_alloc_goal; | |
1da177e4 | 642 | |
cb00ea35 | 643 | if (!goal) { |
4b11111a | 644 | if (!(goal = pgoal)) /* XXX: what was intended here? */ |
48d6d8ff | 645 | goal = iinfo->i_location.logicalBlockNum + 1; |
1da177e4 LT |
646 | } |
647 | ||
4b11111a | 648 | newblocknum = udf_new_block(inode->i_sb, inode, |
48d6d8ff | 649 | iinfo->i_location.partitionReferenceNum, |
4b11111a MS |
650 | goal, err); |
651 | if (!newblocknum) { | |
3bf25cb4 | 652 | brelse(prev_epos.bh); |
1da177e4 LT |
653 | *err = -ENOSPC; |
654 | return NULL; | |
655 | } | |
48d6d8ff | 656 | iinfo->i_lenExtents += inode->i_sb->s_blocksize; |
1da177e4 LT |
657 | } |
658 | ||
4b11111a MS |
659 | /* if the extent the requsted block is located in contains multiple |
660 | * blocks, split the extent into at most three extents. blocks prior | |
661 | * to requested block, requested block, and blocks after requested | |
662 | * block */ | |
1da177e4 LT |
663 | udf_split_extents(inode, &c, offset, newblocknum, laarr, &endnum); |
664 | ||
665 | #ifdef UDF_PREALLOCATE | |
666 | /* preallocate blocks */ | |
667 | udf_prealloc_extents(inode, c, lastblock, laarr, &endnum); | |
668 | #endif | |
669 | ||
670 | /* merge any continuous blocks in laarr */ | |
671 | udf_merge_extents(inode, laarr, &endnum); | |
672 | ||
673 | /* write back the new extents, inserting new extents if the new number | |
28de7948 CG |
674 | * of extents is greater than the old number, and deleting extents if |
675 | * the new number of extents is less than the old number */ | |
ff116fc8 | 676 | udf_update_extents(inode, laarr, startnum, endnum, &prev_epos); |
1da177e4 | 677 | |
3bf25cb4 | 678 | brelse(prev_epos.bh); |
1da177e4 | 679 | |
4b11111a | 680 | newblock = udf_get_pblock(inode->i_sb, newblocknum, |
48d6d8ff | 681 | iinfo->i_location.partitionReferenceNum, 0); |
4b11111a | 682 | if (!newblock) |
1da177e4 | 683 | return NULL; |
1da177e4 LT |
684 | *phys = newblock; |
685 | *err = 0; | |
686 | *new = 1; | |
48d6d8ff MS |
687 | iinfo->i_next_alloc_block = block; |
688 | iinfo->i_next_alloc_goal = newblocknum; | |
1da177e4 LT |
689 | inode->i_ctime = current_fs_time(inode->i_sb); |
690 | ||
691 | if (IS_SYNC(inode)) | |
692 | udf_sync_inode(inode); | |
693 | else | |
694 | mark_inode_dirty(inode); | |
28de7948 | 695 | |
1da177e4 LT |
696 | return result; |
697 | } | |
698 | ||
cb00ea35 CG |
699 | static void udf_split_extents(struct inode *inode, int *c, int offset, |
700 | int newblocknum, | |
701 | kernel_long_ad laarr[EXTENT_MERGE_SIZE], | |
702 | int *endnum) | |
1da177e4 | 703 | { |
4b11111a MS |
704 | unsigned long blocksize = inode->i_sb->s_blocksize; |
705 | unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; | |
706 | ||
1da177e4 | 707 | if ((laarr[*c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30) || |
4b11111a MS |
708 | (laarr[*c].extLength >> 30) == |
709 | (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) { | |
1da177e4 LT |
710 | int curr = *c; |
711 | int blen = ((laarr[curr].extLength & UDF_EXTENT_LENGTH_MASK) + | |
4b11111a | 712 | blocksize - 1) >> blocksize_bits; |
1da177e4 LT |
713 | int8_t etype = (laarr[curr].extLength >> 30); |
714 | ||
4b11111a | 715 | if (blen == 1) |
28de7948 | 716 | ; |
4b11111a | 717 | else if (!offset || blen == offset + 1) { |
cb00ea35 CG |
718 | laarr[curr + 2] = laarr[curr + 1]; |
719 | laarr[curr + 1] = laarr[curr]; | |
720 | } else { | |
721 | laarr[curr + 3] = laarr[curr + 1]; | |
722 | laarr[curr + 2] = laarr[curr + 1] = laarr[curr]; | |
723 | } | |
724 | ||
725 | if (offset) { | |
726 | if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30)) { | |
4b11111a MS |
727 | udf_free_blocks(inode->i_sb, inode, |
728 | laarr[curr].extLocation, | |
729 | 0, offset); | |
730 | laarr[curr].extLength = | |
731 | EXT_NOT_RECORDED_NOT_ALLOCATED | | |
732 | (offset << blocksize_bits); | |
1da177e4 | 733 | laarr[curr].extLocation.logicalBlockNum = 0; |
4b11111a MS |
734 | laarr[curr].extLocation. |
735 | partitionReferenceNum = 0; | |
736 | } else | |
1da177e4 | 737 | laarr[curr].extLength = (etype << 30) | |
4b11111a | 738 | (offset << blocksize_bits); |
cb00ea35 CG |
739 | curr++; |
740 | (*c)++; | |
741 | (*endnum)++; | |
1da177e4 | 742 | } |
647bd61a | 743 | |
1da177e4 LT |
744 | laarr[curr].extLocation.logicalBlockNum = newblocknum; |
745 | if (etype == (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) | |
746 | laarr[curr].extLocation.partitionReferenceNum = | |
c0b34438 | 747 | UDF_I(inode)->i_location.partitionReferenceNum; |
1da177e4 | 748 | laarr[curr].extLength = EXT_RECORDED_ALLOCATED | |
4b11111a | 749 | blocksize; |
cb00ea35 | 750 | curr++; |
1da177e4 | 751 | |
cb00ea35 | 752 | if (blen != offset + 1) { |
1da177e4 | 753 | if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30)) |
4b11111a MS |
754 | laarr[curr].extLocation.logicalBlockNum += |
755 | offset + 1; | |
28de7948 | 756 | laarr[curr].extLength = (etype << 30) | |
4b11111a | 757 | ((blen - (offset + 1)) << blocksize_bits); |
cb00ea35 CG |
758 | curr++; |
759 | (*endnum)++; | |
1da177e4 LT |
760 | } |
761 | } | |
762 | } | |
763 | ||
764 | static void udf_prealloc_extents(struct inode *inode, int c, int lastblock, | |
cb00ea35 CG |
765 | kernel_long_ad laarr[EXTENT_MERGE_SIZE], |
766 | int *endnum) | |
1da177e4 LT |
767 | { |
768 | int start, length = 0, currlength = 0, i; | |
769 | ||
cb00ea35 | 770 | if (*endnum >= (c + 1)) { |
1da177e4 LT |
771 | if (!lastblock) |
772 | return; | |
773 | else | |
774 | start = c; | |
cb00ea35 | 775 | } else { |
4b11111a MS |
776 | if ((laarr[c + 1].extLength >> 30) == |
777 | (EXT_NOT_RECORDED_ALLOCATED >> 30)) { | |
cb00ea35 | 778 | start = c + 1; |
4b11111a MS |
779 | length = currlength = |
780 | (((laarr[c + 1].extLength & | |
781 | UDF_EXTENT_LENGTH_MASK) + | |
782 | inode->i_sb->s_blocksize - 1) >> | |
783 | inode->i_sb->s_blocksize_bits); | |
784 | } else | |
1da177e4 LT |
785 | start = c; |
786 | } | |
787 | ||
cb00ea35 CG |
788 | for (i = start + 1; i <= *endnum; i++) { |
789 | if (i == *endnum) { | |
1da177e4 LT |
790 | if (lastblock) |
791 | length += UDF_DEFAULT_PREALLOC_BLOCKS; | |
4b11111a MS |
792 | } else if ((laarr[i].extLength >> 30) == |
793 | (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) { | |
794 | length += (((laarr[i].extLength & | |
795 | UDF_EXTENT_LENGTH_MASK) + | |
796 | inode->i_sb->s_blocksize - 1) >> | |
797 | inode->i_sb->s_blocksize_bits); | |
798 | } else | |
1da177e4 LT |
799 | break; |
800 | } | |
801 | ||
cb00ea35 | 802 | if (length) { |
1da177e4 | 803 | int next = laarr[start].extLocation.logicalBlockNum + |
28de7948 | 804 | (((laarr[start].extLength & UDF_EXTENT_LENGTH_MASK) + |
4b11111a MS |
805 | inode->i_sb->s_blocksize - 1) >> |
806 | inode->i_sb->s_blocksize_bits); | |
1da177e4 | 807 | int numalloc = udf_prealloc_blocks(inode->i_sb, inode, |
4b11111a MS |
808 | laarr[start].extLocation.partitionReferenceNum, |
809 | next, (UDF_DEFAULT_PREALLOC_BLOCKS > length ? | |
810 | length : UDF_DEFAULT_PREALLOC_BLOCKS) - | |
811 | currlength); | |
28de7948 | 812 | if (numalloc) { |
4b11111a | 813 | if (start == (c + 1)) |
1da177e4 | 814 | laarr[start].extLength += |
4b11111a MS |
815 | (numalloc << |
816 | inode->i_sb->s_blocksize_bits); | |
817 | else { | |
cb00ea35 CG |
818 | memmove(&laarr[c + 2], &laarr[c + 1], |
819 | sizeof(long_ad) * (*endnum - (c + 1))); | |
820 | (*endnum)++; | |
821 | laarr[c + 1].extLocation.logicalBlockNum = next; | |
822 | laarr[c + 1].extLocation.partitionReferenceNum = | |
4b11111a MS |
823 | laarr[c].extLocation. |
824 | partitionReferenceNum; | |
825 | laarr[c + 1].extLength = | |
826 | EXT_NOT_RECORDED_ALLOCATED | | |
827 | (numalloc << | |
828 | inode->i_sb->s_blocksize_bits); | |
cb00ea35 | 829 | start = c + 1; |
1da177e4 LT |
830 | } |
831 | ||
cb00ea35 | 832 | for (i = start + 1; numalloc && i < *endnum; i++) { |
4b11111a MS |
833 | int elen = ((laarr[i].extLength & |
834 | UDF_EXTENT_LENGTH_MASK) + | |
835 | inode->i_sb->s_blocksize - 1) >> | |
836 | inode->i_sb->s_blocksize_bits; | |
1da177e4 | 837 | |
cb00ea35 | 838 | if (elen > numalloc) { |
1da177e4 | 839 | laarr[i].extLength -= |
4b11111a MS |
840 | (numalloc << |
841 | inode->i_sb->s_blocksize_bits); | |
1da177e4 | 842 | numalloc = 0; |
cb00ea35 | 843 | } else { |
1da177e4 | 844 | numalloc -= elen; |
cb00ea35 | 845 | if (*endnum > (i + 1)) |
4b11111a MS |
846 | memmove(&laarr[i], |
847 | &laarr[i + 1], | |
848 | sizeof(long_ad) * | |
849 | (*endnum - (i + 1))); | |
cb00ea35 CG |
850 | i--; |
851 | (*endnum)--; | |
1da177e4 LT |
852 | } |
853 | } | |
c0b34438 | 854 | UDF_I(inode)->i_lenExtents += |
4b11111a | 855 | numalloc << inode->i_sb->s_blocksize_bits; |
1da177e4 LT |
856 | } |
857 | } | |
858 | } | |
859 | ||
860 | static void udf_merge_extents(struct inode *inode, | |
cb00ea35 CG |
861 | kernel_long_ad laarr[EXTENT_MERGE_SIZE], |
862 | int *endnum) | |
1da177e4 LT |
863 | { |
864 | int i; | |
4b11111a MS |
865 | unsigned long blocksize = inode->i_sb->s_blocksize; |
866 | unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; | |
1da177e4 | 867 | |
cb00ea35 | 868 | for (i = 0; i < (*endnum - 1); i++) { |
4b11111a MS |
869 | kernel_long_ad *li /*l[i]*/ = &laarr[i]; |
870 | kernel_long_ad *lip1 /*l[i plus 1]*/ = &laarr[i + 1]; | |
871 | ||
872 | if (((li->extLength >> 30) == (lip1->extLength >> 30)) && | |
873 | (((li->extLength >> 30) == | |
874 | (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) || | |
875 | ((lip1->extLocation.logicalBlockNum - | |
876 | li->extLocation.logicalBlockNum) == | |
877 | (((li->extLength & UDF_EXTENT_LENGTH_MASK) + | |
878 | blocksize - 1) >> blocksize_bits)))) { | |
879 | ||
880 | if (((li->extLength & UDF_EXTENT_LENGTH_MASK) + | |
881 | (lip1->extLength & UDF_EXTENT_LENGTH_MASK) + | |
882 | blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) { | |
883 | lip1->extLength = (lip1->extLength - | |
884 | (li->extLength & | |
885 | UDF_EXTENT_LENGTH_MASK) + | |
886 | UDF_EXTENT_LENGTH_MASK) & | |
887 | ~(blocksize - 1); | |
888 | li->extLength = (li->extLength & | |
889 | UDF_EXTENT_FLAG_MASK) + | |
890 | (UDF_EXTENT_LENGTH_MASK + 1) - | |
891 | blocksize; | |
892 | lip1->extLocation.logicalBlockNum = | |
893 | li->extLocation.logicalBlockNum + | |
894 | ((li->extLength & | |
895 | UDF_EXTENT_LENGTH_MASK) >> | |
896 | blocksize_bits); | |
897 | } else { | |
898 | li->extLength = lip1->extLength + | |
899 | (((li->extLength & | |
900 | UDF_EXTENT_LENGTH_MASK) + | |
901 | blocksize - 1) & ~(blocksize - 1)); | |
902 | if (*endnum > (i + 2)) | |
903 | memmove(&laarr[i + 1], &laarr[i + 2], | |
904 | sizeof(long_ad) * | |
905 | (*endnum - (i + 2))); | |
906 | i--; | |
907 | (*endnum)--; | |
1da177e4 | 908 | } |
4b11111a MS |
909 | } else if (((li->extLength >> 30) == |
910 | (EXT_NOT_RECORDED_ALLOCATED >> 30)) && | |
911 | ((lip1->extLength >> 30) == | |
912 | (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))) { | |
913 | udf_free_blocks(inode->i_sb, inode, li->extLocation, 0, | |
914 | ((li->extLength & | |
915 | UDF_EXTENT_LENGTH_MASK) + | |
916 | blocksize - 1) >> blocksize_bits); | |
917 | li->extLocation.logicalBlockNum = 0; | |
918 | li->extLocation.partitionReferenceNum = 0; | |
919 | ||
920 | if (((li->extLength & UDF_EXTENT_LENGTH_MASK) + | |
921 | (lip1->extLength & UDF_EXTENT_LENGTH_MASK) + | |
922 | blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) { | |
923 | lip1->extLength = (lip1->extLength - | |
924 | (li->extLength & | |
925 | UDF_EXTENT_LENGTH_MASK) + | |
926 | UDF_EXTENT_LENGTH_MASK) & | |
927 | ~(blocksize - 1); | |
928 | li->extLength = (li->extLength & | |
929 | UDF_EXTENT_FLAG_MASK) + | |
930 | (UDF_EXTENT_LENGTH_MASK + 1) - | |
931 | blocksize; | |
cb00ea35 | 932 | } else { |
4b11111a MS |
933 | li->extLength = lip1->extLength + |
934 | (((li->extLength & | |
935 | UDF_EXTENT_LENGTH_MASK) + | |
936 | blocksize - 1) & ~(blocksize - 1)); | |
cb00ea35 CG |
937 | if (*endnum > (i + 2)) |
938 | memmove(&laarr[i + 1], &laarr[i + 2], | |
4b11111a MS |
939 | sizeof(long_ad) * |
940 | (*endnum - (i + 2))); | |
cb00ea35 CG |
941 | i--; |
942 | (*endnum)--; | |
1da177e4 | 943 | } |
4b11111a MS |
944 | } else if ((li->extLength >> 30) == |
945 | (EXT_NOT_RECORDED_ALLOCATED >> 30)) { | |
946 | udf_free_blocks(inode->i_sb, inode, | |
947 | li->extLocation, 0, | |
948 | ((li->extLength & | |
949 | UDF_EXTENT_LENGTH_MASK) + | |
950 | blocksize - 1) >> blocksize_bits); | |
951 | li->extLocation.logicalBlockNum = 0; | |
952 | li->extLocation.partitionReferenceNum = 0; | |
953 | li->extLength = (li->extLength & | |
954 | UDF_EXTENT_LENGTH_MASK) | | |
955 | EXT_NOT_RECORDED_NOT_ALLOCATED; | |
1da177e4 LT |
956 | } |
957 | } | |
958 | } | |
959 | ||
960 | static void udf_update_extents(struct inode *inode, | |
cb00ea35 CG |
961 | kernel_long_ad laarr[EXTENT_MERGE_SIZE], |
962 | int startnum, int endnum, | |
963 | struct extent_position *epos) | |
1da177e4 LT |
964 | { |
965 | int start = 0, i; | |
966 | kernel_lb_addr tmploc; | |
967 | uint32_t tmplen; | |
968 | ||
cb00ea35 CG |
969 | if (startnum > endnum) { |
970 | for (i = 0; i < (startnum - endnum); i++) | |
ff116fc8 | 971 | udf_delete_aext(inode, *epos, laarr[i].extLocation, |
cb00ea35 CG |
972 | laarr[i].extLength); |
973 | } else if (startnum < endnum) { | |
974 | for (i = 0; i < (endnum - startnum); i++) { | |
ff116fc8 | 975 | udf_insert_aext(inode, *epos, laarr[i].extLocation, |
cb00ea35 | 976 | laarr[i].extLength); |
ff116fc8 | 977 | udf_next_aext(inode, epos, &laarr[i].extLocation, |
cb00ea35 CG |
978 | &laarr[i].extLength, 1); |
979 | start++; | |
1da177e4 LT |
980 | } |
981 | } | |
982 | ||
cb00ea35 | 983 | for (i = start; i < endnum; i++) { |
ff116fc8 JK |
984 | udf_next_aext(inode, epos, &tmploc, &tmplen, 0); |
985 | udf_write_aext(inode, epos, laarr[i].extLocation, | |
cb00ea35 | 986 | laarr[i].extLength, 1); |
1da177e4 LT |
987 | } |
988 | } | |
989 | ||
cb00ea35 CG |
990 | struct buffer_head *udf_bread(struct inode *inode, int block, |
991 | int create, int *err) | |
1da177e4 | 992 | { |
cb00ea35 | 993 | struct buffer_head *bh = NULL; |
1da177e4 LT |
994 | |
995 | bh = udf_getblk(inode, block, create, err); | |
996 | if (!bh) | |
997 | return NULL; | |
998 | ||
999 | if (buffer_uptodate(bh)) | |
1000 | return bh; | |
28de7948 | 1001 | |
1da177e4 | 1002 | ll_rw_block(READ, 1, &bh); |
28de7948 | 1003 | |
1da177e4 LT |
1004 | wait_on_buffer(bh); |
1005 | if (buffer_uptodate(bh)) | |
1006 | return bh; | |
28de7948 | 1007 | |
1da177e4 LT |
1008 | brelse(bh); |
1009 | *err = -EIO; | |
1010 | return NULL; | |
1011 | } | |
1012 | ||
cb00ea35 | 1013 | void udf_truncate(struct inode *inode) |
1da177e4 LT |
1014 | { |
1015 | int offset; | |
1016 | int err; | |
48d6d8ff | 1017 | struct udf_inode_info *iinfo; |
1da177e4 LT |
1018 | |
1019 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || | |
cb00ea35 | 1020 | S_ISLNK(inode->i_mode))) |
1da177e4 LT |
1021 | return; |
1022 | if (IS_APPEND(inode) || IS_IMMUTABLE(inode)) | |
1023 | return; | |
1024 | ||
1025 | lock_kernel(); | |
48d6d8ff MS |
1026 | iinfo = UDF_I(inode); |
1027 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { | |
4b11111a MS |
1028 | if (inode->i_sb->s_blocksize < |
1029 | (udf_file_entry_alloc_offset(inode) + | |
1030 | inode->i_size)) { | |
1da177e4 | 1031 | udf_expand_file_adinicb(inode, inode->i_size, &err); |
48d6d8ff MS |
1032 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { |
1033 | inode->i_size = iinfo->i_lenAlloc; | |
1da177e4 LT |
1034 | unlock_kernel(); |
1035 | return; | |
4b11111a | 1036 | } else |
1da177e4 | 1037 | udf_truncate_extents(inode); |
cb00ea35 | 1038 | } else { |
1da177e4 | 1039 | offset = inode->i_size & (inode->i_sb->s_blocksize - 1); |
48d6d8ff | 1040 | memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr + offset, |
c0b34438 | 1041 | 0x00, inode->i_sb->s_blocksize - |
4b11111a | 1042 | offset - udf_file_entry_alloc_offset(inode)); |
48d6d8ff | 1043 | iinfo->i_lenAlloc = inode->i_size; |
1da177e4 | 1044 | } |
cb00ea35 | 1045 | } else { |
4b11111a MS |
1046 | block_truncate_page(inode->i_mapping, inode->i_size, |
1047 | udf_get_block); | |
1da177e4 | 1048 | udf_truncate_extents(inode); |
647bd61a | 1049 | } |
1da177e4 LT |
1050 | |
1051 | inode->i_mtime = inode->i_ctime = current_fs_time(inode->i_sb); | |
1052 | if (IS_SYNC(inode)) | |
cb00ea35 | 1053 | udf_sync_inode(inode); |
1da177e4 LT |
1054 | else |
1055 | mark_inode_dirty(inode); | |
1056 | unlock_kernel(); | |
1057 | } | |
1058 | ||
cb00ea35 | 1059 | static void __udf_read_inode(struct inode *inode) |
1da177e4 LT |
1060 | { |
1061 | struct buffer_head *bh = NULL; | |
1062 | struct fileEntry *fe; | |
1063 | uint16_t ident; | |
48d6d8ff | 1064 | struct udf_inode_info *iinfo = UDF_I(inode); |
1da177e4 LT |
1065 | |
1066 | /* | |
1067 | * Set defaults, but the inode is still incomplete! | |
1068 | * Note: get_new_inode() sets the following on a new inode: | |
1069 | * i_sb = sb | |
1070 | * i_no = ino | |
1071 | * i_flags = sb->s_flags | |
1072 | * i_state = 0 | |
1073 | * clean_inode(): zero fills and sets | |
1074 | * i_count = 1 | |
1075 | * i_nlink = 1 | |
1076 | * i_op = NULL; | |
1077 | */ | |
48d6d8ff | 1078 | bh = udf_read_ptagged(inode->i_sb, iinfo->i_location, 0, &ident); |
cb00ea35 | 1079 | if (!bh) { |
1da177e4 | 1080 | printk(KERN_ERR "udf: udf_read_inode(ino %ld) failed !bh\n", |
cb00ea35 | 1081 | inode->i_ino); |
1da177e4 LT |
1082 | make_bad_inode(inode); |
1083 | return; | |
1084 | } | |
1085 | ||
1086 | if (ident != TAG_IDENT_FE && ident != TAG_IDENT_EFE && | |
cb00ea35 | 1087 | ident != TAG_IDENT_USE) { |
4b11111a MS |
1088 | printk(KERN_ERR "udf: udf_read_inode(ino %ld) " |
1089 | "failed ident=%d\n", inode->i_ino, ident); | |
3bf25cb4 | 1090 | brelse(bh); |
1da177e4 LT |
1091 | make_bad_inode(inode); |
1092 | return; | |
1093 | } | |
1094 | ||
1095 | fe = (struct fileEntry *)bh->b_data; | |
1096 | ||
5e0f0017 | 1097 | if (fe->icbTag.strategyType == cpu_to_le16(4096)) { |
1ab92785 | 1098 | struct buffer_head *ibh; |
1da177e4 | 1099 | |
48d6d8ff | 1100 | ibh = udf_read_ptagged(inode->i_sb, iinfo->i_location, 1, |
4b11111a | 1101 | &ident); |
1ab92785 | 1102 | if (ident == TAG_IDENT_IE && ibh) { |
1103 | struct buffer_head *nbh = NULL; | |
1104 | kernel_lb_addr loc; | |
1105 | struct indirectEntry *ie; | |
1106 | ||
1107 | ie = (struct indirectEntry *)ibh->b_data; | |
1108 | loc = lelb_to_cpu(ie->indirectICB.extLocation); | |
1109 | ||
1110 | if (ie->indirectICB.extLength && | |
1111 | (nbh = udf_read_ptagged(inode->i_sb, loc, 0, | |
1112 | &ident))) { | |
1113 | if (ident == TAG_IDENT_FE || | |
1114 | ident == TAG_IDENT_EFE) { | |
1115 | memcpy(&iinfo->i_location, | |
1116 | &loc, | |
1117 | sizeof(kernel_lb_addr)); | |
1118 | brelse(bh); | |
3bf25cb4 | 1119 | brelse(ibh); |
1ab92785 | 1120 | brelse(nbh); |
1121 | __udf_read_inode(inode); | |
1122 | return; | |
28de7948 | 1123 | } |
1ab92785 | 1124 | brelse(nbh); |
1da177e4 | 1125 | } |
28de7948 | 1126 | } |
1ab92785 | 1127 | brelse(ibh); |
5e0f0017 | 1128 | } else if (fe->icbTag.strategyType != cpu_to_le16(4)) { |
1da177e4 | 1129 | printk(KERN_ERR "udf: unsupported strategy type: %d\n", |
cb00ea35 | 1130 | le16_to_cpu(fe->icbTag.strategyType)); |
3bf25cb4 | 1131 | brelse(bh); |
1da177e4 LT |
1132 | make_bad_inode(inode); |
1133 | return; | |
1134 | } | |
1135 | udf_fill_inode(inode, bh); | |
31170b6a | 1136 | |
3bf25cb4 | 1137 | brelse(bh); |
1da177e4 LT |
1138 | } |
1139 | ||
1140 | static void udf_fill_inode(struct inode *inode, struct buffer_head *bh) | |
1141 | { | |
1142 | struct fileEntry *fe; | |
1143 | struct extendedFileEntry *efe; | |
1da177e4 | 1144 | int offset; |
6c79e987 | 1145 | struct udf_sb_info *sbi = UDF_SB(inode->i_sb); |
48d6d8ff | 1146 | struct udf_inode_info *iinfo = UDF_I(inode); |
1da177e4 LT |
1147 | |
1148 | fe = (struct fileEntry *)bh->b_data; | |
1149 | efe = (struct extendedFileEntry *)bh->b_data; | |
1150 | ||
5e0f0017 | 1151 | if (fe->icbTag.strategyType == cpu_to_le16(4)) |
48d6d8ff | 1152 | iinfo->i_strat4096 = 0; |
5e0f0017 | 1153 | else /* if (fe->icbTag.strategyType == cpu_to_le16(4096)) */ |
48d6d8ff | 1154 | iinfo->i_strat4096 = 1; |
1da177e4 | 1155 | |
48d6d8ff | 1156 | iinfo->i_alloc_type = le16_to_cpu(fe->icbTag.flags) & |
4b11111a | 1157 | ICBTAG_FLAG_AD_MASK; |
48d6d8ff MS |
1158 | iinfo->i_unique = 0; |
1159 | iinfo->i_lenEAttr = 0; | |
1160 | iinfo->i_lenExtents = 0; | |
1161 | iinfo->i_lenAlloc = 0; | |
1162 | iinfo->i_next_alloc_block = 0; | |
1163 | iinfo->i_next_alloc_goal = 0; | |
5e0f0017 | 1164 | if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_EFE)) { |
48d6d8ff MS |
1165 | iinfo->i_efe = 1; |
1166 | iinfo->i_use = 0; | |
4b11111a MS |
1167 | if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize - |
1168 | sizeof(struct extendedFileEntry))) { | |
647bd61a CG |
1169 | make_bad_inode(inode); |
1170 | return; | |
1171 | } | |
48d6d8ff | 1172 | memcpy(iinfo->i_ext.i_data, |
4b11111a MS |
1173 | bh->b_data + sizeof(struct extendedFileEntry), |
1174 | inode->i_sb->s_blocksize - | |
1175 | sizeof(struct extendedFileEntry)); | |
5e0f0017 | 1176 | } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_FE)) { |
48d6d8ff MS |
1177 | iinfo->i_efe = 0; |
1178 | iinfo->i_use = 0; | |
4b11111a MS |
1179 | if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize - |
1180 | sizeof(struct fileEntry))) { | |
647bd61a CG |
1181 | make_bad_inode(inode); |
1182 | return; | |
1183 | } | |
48d6d8ff | 1184 | memcpy(iinfo->i_ext.i_data, |
c0b34438 | 1185 | bh->b_data + sizeof(struct fileEntry), |
cb00ea35 | 1186 | inode->i_sb->s_blocksize - sizeof(struct fileEntry)); |
5e0f0017 | 1187 | } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_USE)) { |
48d6d8ff MS |
1188 | iinfo->i_efe = 0; |
1189 | iinfo->i_use = 1; | |
1190 | iinfo->i_lenAlloc = le32_to_cpu( | |
4b11111a MS |
1191 | ((struct unallocSpaceEntry *)bh->b_data)-> |
1192 | lengthAllocDescs); | |
1193 | if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize - | |
1194 | sizeof(struct unallocSpaceEntry))) { | |
647bd61a CG |
1195 | make_bad_inode(inode); |
1196 | return; | |
1197 | } | |
48d6d8ff | 1198 | memcpy(iinfo->i_ext.i_data, |
4b11111a MS |
1199 | bh->b_data + sizeof(struct unallocSpaceEntry), |
1200 | inode->i_sb->s_blocksize - | |
1201 | sizeof(struct unallocSpaceEntry)); | |
1da177e4 LT |
1202 | return; |
1203 | } | |
1204 | ||
1205 | inode->i_uid = le32_to_cpu(fe->uid); | |
ca76d2d8 CG |
1206 | if (inode->i_uid == -1 || |
1207 | UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_IGNORE) || | |
1208 | UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_SET)) | |
4d6660eb | 1209 | inode->i_uid = UDF_SB(inode->i_sb)->s_uid; |
1da177e4 LT |
1210 | |
1211 | inode->i_gid = le32_to_cpu(fe->gid); | |
ca76d2d8 CG |
1212 | if (inode->i_gid == -1 || |
1213 | UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_IGNORE) || | |
1214 | UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_SET)) | |
4d6660eb | 1215 | inode->i_gid = UDF_SB(inode->i_sb)->s_gid; |
1da177e4 LT |
1216 | |
1217 | inode->i_nlink = le16_to_cpu(fe->fileLinkCount); | |
1218 | if (!inode->i_nlink) | |
1219 | inode->i_nlink = 1; | |
647bd61a | 1220 | |
1da177e4 | 1221 | inode->i_size = le64_to_cpu(fe->informationLength); |
48d6d8ff | 1222 | iinfo->i_lenExtents = inode->i_size; |
1da177e4 LT |
1223 | |
1224 | inode->i_mode = udf_convert_permissions(fe); | |
1225 | inode->i_mode &= ~UDF_SB(inode->i_sb)->s_umask; | |
1226 | ||
48d6d8ff | 1227 | if (iinfo->i_efe == 0) { |
1da177e4 | 1228 | inode->i_blocks = le64_to_cpu(fe->logicalBlocksRecorded) << |
28de7948 | 1229 | (inode->i_sb->s_blocksize_bits - 9); |
1da177e4 | 1230 | |
56774805 | 1231 | if (!udf_disk_stamp_to_time(&inode->i_atime, fe->accessTime)) |
cbf5676a | 1232 | inode->i_atime = sbi->s_record_time; |
1233 | ||
56774805 MS |
1234 | if (!udf_disk_stamp_to_time(&inode->i_mtime, |
1235 | fe->modificationTime)) | |
cbf5676a | 1236 | inode->i_mtime = sbi->s_record_time; |
1237 | ||
56774805 | 1238 | if (!udf_disk_stamp_to_time(&inode->i_ctime, fe->attrTime)) |
cbf5676a | 1239 | inode->i_ctime = sbi->s_record_time; |
1da177e4 | 1240 | |
48d6d8ff MS |
1241 | iinfo->i_unique = le64_to_cpu(fe->uniqueID); |
1242 | iinfo->i_lenEAttr = le32_to_cpu(fe->lengthExtendedAttr); | |
1243 | iinfo->i_lenAlloc = le32_to_cpu(fe->lengthAllocDescs); | |
1244 | offset = sizeof(struct fileEntry) + iinfo->i_lenEAttr; | |
cb00ea35 | 1245 | } else { |
647bd61a | 1246 | inode->i_blocks = le64_to_cpu(efe->logicalBlocksRecorded) << |
cb00ea35 | 1247 | (inode->i_sb->s_blocksize_bits - 9); |
1da177e4 | 1248 | |
56774805 | 1249 | if (!udf_disk_stamp_to_time(&inode->i_atime, efe->accessTime)) |
cbf5676a | 1250 | inode->i_atime = sbi->s_record_time; |
1251 | ||
56774805 MS |
1252 | if (!udf_disk_stamp_to_time(&inode->i_mtime, |
1253 | efe->modificationTime)) | |
cbf5676a | 1254 | inode->i_mtime = sbi->s_record_time; |
1255 | ||
56774805 | 1256 | if (!udf_disk_stamp_to_time(&iinfo->i_crtime, efe->createTime)) |
cbf5676a | 1257 | iinfo->i_crtime = sbi->s_record_time; |
1258 | ||
56774805 | 1259 | if (!udf_disk_stamp_to_time(&inode->i_ctime, efe->attrTime)) |
cbf5676a | 1260 | inode->i_ctime = sbi->s_record_time; |
1da177e4 | 1261 | |
48d6d8ff MS |
1262 | iinfo->i_unique = le64_to_cpu(efe->uniqueID); |
1263 | iinfo->i_lenEAttr = le32_to_cpu(efe->lengthExtendedAttr); | |
1264 | iinfo->i_lenAlloc = le32_to_cpu(efe->lengthAllocDescs); | |
4b11111a | 1265 | offset = sizeof(struct extendedFileEntry) + |
48d6d8ff | 1266 | iinfo->i_lenEAttr; |
1da177e4 LT |
1267 | } |
1268 | ||
cb00ea35 CG |
1269 | switch (fe->icbTag.fileType) { |
1270 | case ICBTAG_FILE_TYPE_DIRECTORY: | |
28de7948 CG |
1271 | inode->i_op = &udf_dir_inode_operations; |
1272 | inode->i_fop = &udf_dir_operations; | |
1273 | inode->i_mode |= S_IFDIR; | |
1274 | inc_nlink(inode); | |
1275 | break; | |
cb00ea35 CG |
1276 | case ICBTAG_FILE_TYPE_REALTIME: |
1277 | case ICBTAG_FILE_TYPE_REGULAR: | |
1278 | case ICBTAG_FILE_TYPE_UNDEF: | |
742e1795 | 1279 | case ICBTAG_FILE_TYPE_VAT20: |
48d6d8ff | 1280 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
28de7948 CG |
1281 | inode->i_data.a_ops = &udf_adinicb_aops; |
1282 | else | |
1283 | inode->i_data.a_ops = &udf_aops; | |
1284 | inode->i_op = &udf_file_inode_operations; | |
1285 | inode->i_fop = &udf_file_operations; | |
1286 | inode->i_mode |= S_IFREG; | |
1287 | break; | |
cb00ea35 | 1288 | case ICBTAG_FILE_TYPE_BLOCK: |
28de7948 CG |
1289 | inode->i_mode |= S_IFBLK; |
1290 | break; | |
cb00ea35 | 1291 | case ICBTAG_FILE_TYPE_CHAR: |
28de7948 CG |
1292 | inode->i_mode |= S_IFCHR; |
1293 | break; | |
cb00ea35 | 1294 | case ICBTAG_FILE_TYPE_FIFO: |
28de7948 CG |
1295 | init_special_inode(inode, inode->i_mode | S_IFIFO, 0); |
1296 | break; | |
cb00ea35 | 1297 | case ICBTAG_FILE_TYPE_SOCKET: |
28de7948 CG |
1298 | init_special_inode(inode, inode->i_mode | S_IFSOCK, 0); |
1299 | break; | |
cb00ea35 | 1300 | case ICBTAG_FILE_TYPE_SYMLINK: |
28de7948 CG |
1301 | inode->i_data.a_ops = &udf_symlink_aops; |
1302 | inode->i_op = &page_symlink_inode_operations; | |
1303 | inode->i_mode = S_IFLNK | S_IRWXUGO; | |
1304 | break; | |
bfb257a5 JK |
1305 | case ICBTAG_FILE_TYPE_MAIN: |
1306 | udf_debug("METADATA FILE-----\n"); | |
1307 | break; | |
1308 | case ICBTAG_FILE_TYPE_MIRROR: | |
1309 | udf_debug("METADATA MIRROR FILE-----\n"); | |
1310 | break; | |
1311 | case ICBTAG_FILE_TYPE_BITMAP: | |
1312 | udf_debug("METADATA BITMAP FILE-----\n"); | |
1313 | break; | |
cb00ea35 | 1314 | default: |
4b11111a MS |
1315 | printk(KERN_ERR "udf: udf_fill_inode(ino %ld) failed unknown " |
1316 | "file type=%d\n", inode->i_ino, | |
1317 | fe->icbTag.fileType); | |
28de7948 CG |
1318 | make_bad_inode(inode); |
1319 | return; | |
1da177e4 | 1320 | } |
cb00ea35 | 1321 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { |
4b11111a MS |
1322 | struct deviceSpec *dsea = |
1323 | (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1); | |
cb00ea35 CG |
1324 | if (dsea) { |
1325 | init_special_inode(inode, inode->i_mode, | |
4b11111a MS |
1326 | MKDEV(le32_to_cpu(dsea->majorDeviceIdent), |
1327 | le32_to_cpu(dsea->minorDeviceIdent))); | |
1da177e4 | 1328 | /* Developer ID ??? */ |
4b11111a | 1329 | } else |
1da177e4 | 1330 | make_bad_inode(inode); |
1da177e4 LT |
1331 | } |
1332 | } | |
1333 | ||
647bd61a CG |
1334 | static int udf_alloc_i_data(struct inode *inode, size_t size) |
1335 | { | |
48d6d8ff MS |
1336 | struct udf_inode_info *iinfo = UDF_I(inode); |
1337 | iinfo->i_ext.i_data = kmalloc(size, GFP_KERNEL); | |
647bd61a | 1338 | |
48d6d8ff | 1339 | if (!iinfo->i_ext.i_data) { |
4b11111a MS |
1340 | printk(KERN_ERR "udf:udf_alloc_i_data (ino %ld) " |
1341 | "no free memory\n", inode->i_ino); | |
647bd61a CG |
1342 | return -ENOMEM; |
1343 | } | |
1344 | ||
1345 | return 0; | |
1346 | } | |
1347 | ||
cb00ea35 | 1348 | static mode_t udf_convert_permissions(struct fileEntry *fe) |
1da177e4 LT |
1349 | { |
1350 | mode_t mode; | |
1351 | uint32_t permissions; | |
1352 | uint32_t flags; | |
1353 | ||
1354 | permissions = le32_to_cpu(fe->permissions); | |
1355 | flags = le16_to_cpu(fe->icbTag.flags); | |
1356 | ||
4b11111a MS |
1357 | mode = ((permissions) & S_IRWXO) | |
1358 | ((permissions >> 2) & S_IRWXG) | | |
1359 | ((permissions >> 4) & S_IRWXU) | | |
1360 | ((flags & ICBTAG_FLAG_SETUID) ? S_ISUID : 0) | | |
1361 | ((flags & ICBTAG_FLAG_SETGID) ? S_ISGID : 0) | | |
1362 | ((flags & ICBTAG_FLAG_STICKY) ? S_ISVTX : 0); | |
1da177e4 LT |
1363 | |
1364 | return mode; | |
1365 | } | |
1366 | ||
cb00ea35 | 1367 | int udf_write_inode(struct inode *inode, int sync) |
1da177e4 LT |
1368 | { |
1369 | int ret; | |
28de7948 | 1370 | |
1da177e4 LT |
1371 | lock_kernel(); |
1372 | ret = udf_update_inode(inode, sync); | |
1373 | unlock_kernel(); | |
28de7948 | 1374 | |
1da177e4 LT |
1375 | return ret; |
1376 | } | |
1377 | ||
cb00ea35 | 1378 | int udf_sync_inode(struct inode *inode) |
1da177e4 LT |
1379 | { |
1380 | return udf_update_inode(inode, 1); | |
1381 | } | |
1382 | ||
cb00ea35 | 1383 | static int udf_update_inode(struct inode *inode, int do_sync) |
1da177e4 LT |
1384 | { |
1385 | struct buffer_head *bh = NULL; | |
1386 | struct fileEntry *fe; | |
1387 | struct extendedFileEntry *efe; | |
1388 | uint32_t udfperms; | |
1389 | uint16_t icbflags; | |
1390 | uint16_t crclen; | |
1da177e4 | 1391 | int err = 0; |
6c79e987 | 1392 | struct udf_sb_info *sbi = UDF_SB(inode->i_sb); |
4b11111a | 1393 | unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; |
48d6d8ff | 1394 | struct udf_inode_info *iinfo = UDF_I(inode); |
1da177e4 | 1395 | |
4b11111a MS |
1396 | bh = udf_tread(inode->i_sb, |
1397 | udf_get_lb_pblock(inode->i_sb, | |
48d6d8ff | 1398 | iinfo->i_location, 0)); |
cb00ea35 | 1399 | if (!bh) { |
1da177e4 LT |
1400 | udf_debug("bread failure\n"); |
1401 | return -EIO; | |
1402 | } | |
1403 | ||
1404 | memset(bh->b_data, 0x00, inode->i_sb->s_blocksize); | |
1405 | ||
1406 | fe = (struct fileEntry *)bh->b_data; | |
1407 | efe = (struct extendedFileEntry *)bh->b_data; | |
1408 | ||
5e0f0017 | 1409 | if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_USE)) { |
1da177e4 | 1410 | struct unallocSpaceEntry *use = |
28de7948 | 1411 | (struct unallocSpaceEntry *)bh->b_data; |
1da177e4 | 1412 | |
48d6d8ff | 1413 | use->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc); |
4b11111a | 1414 | memcpy(bh->b_data + sizeof(struct unallocSpaceEntry), |
48d6d8ff | 1415 | iinfo->i_ext.i_data, inode->i_sb->s_blocksize - |
4b11111a MS |
1416 | sizeof(struct unallocSpaceEntry)); |
1417 | crclen = sizeof(struct unallocSpaceEntry) + | |
48d6d8ff | 1418 | iinfo->i_lenAlloc - sizeof(tag); |
4b11111a | 1419 | use->descTag.tagLocation = cpu_to_le32( |
48d6d8ff | 1420 | iinfo->i_location. |
4b11111a | 1421 | logicalBlockNum); |
1da177e4 | 1422 | use->descTag.descCRCLength = cpu_to_le16(crclen); |
f845fced BC |
1423 | use->descTag.descCRC = cpu_to_le16(crc_itu_t(0, (char *)use + |
1424 | sizeof(tag), | |
1425 | crclen)); | |
3f2587bb | 1426 | use->descTag.tagChecksum = udf_tag_checksum(&use->descTag); |
1da177e4 LT |
1427 | |
1428 | mark_buffer_dirty(bh); | |
3bf25cb4 | 1429 | brelse(bh); |
1da177e4 LT |
1430 | return err; |
1431 | } | |
1432 | ||
4d6660eb PS |
1433 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_FORGET)) |
1434 | fe->uid = cpu_to_le32(-1); | |
cb00ea35 CG |
1435 | else |
1436 | fe->uid = cpu_to_le32(inode->i_uid); | |
1da177e4 | 1437 | |
4d6660eb PS |
1438 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_FORGET)) |
1439 | fe->gid = cpu_to_le32(-1); | |
cb00ea35 CG |
1440 | else |
1441 | fe->gid = cpu_to_le32(inode->i_gid); | |
1da177e4 | 1442 | |
4b11111a MS |
1443 | udfperms = ((inode->i_mode & S_IRWXO)) | |
1444 | ((inode->i_mode & S_IRWXG) << 2) | | |
1445 | ((inode->i_mode & S_IRWXU) << 4); | |
1da177e4 | 1446 | |
4b11111a MS |
1447 | udfperms |= (le32_to_cpu(fe->permissions) & |
1448 | (FE_PERM_O_DELETE | FE_PERM_O_CHATTR | | |
1449 | FE_PERM_G_DELETE | FE_PERM_G_CHATTR | | |
1450 | FE_PERM_U_DELETE | FE_PERM_U_CHATTR)); | |
1da177e4 LT |
1451 | fe->permissions = cpu_to_le32(udfperms); |
1452 | ||
1453 | if (S_ISDIR(inode->i_mode)) | |
1454 | fe->fileLinkCount = cpu_to_le16(inode->i_nlink - 1); | |
1455 | else | |
1456 | fe->fileLinkCount = cpu_to_le16(inode->i_nlink); | |
1457 | ||
1458 | fe->informationLength = cpu_to_le64(inode->i_size); | |
1459 | ||
cb00ea35 | 1460 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { |
1da177e4 | 1461 | regid *eid; |
28de7948 CG |
1462 | struct deviceSpec *dsea = |
1463 | (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1); | |
cb00ea35 | 1464 | if (!dsea) { |
1da177e4 | 1465 | dsea = (struct deviceSpec *) |
28de7948 CG |
1466 | udf_add_extendedattr(inode, |
1467 | sizeof(struct deviceSpec) + | |
1468 | sizeof(regid), 12, 0x3); | |
1da177e4 LT |
1469 | dsea->attrType = cpu_to_le32(12); |
1470 | dsea->attrSubtype = 1; | |
4b11111a MS |
1471 | dsea->attrLength = cpu_to_le32( |
1472 | sizeof(struct deviceSpec) + | |
1473 | sizeof(regid)); | |
1da177e4 LT |
1474 | dsea->impUseLength = cpu_to_le32(sizeof(regid)); |
1475 | } | |
28de7948 | 1476 | eid = (regid *)dsea->impUse; |
1da177e4 LT |
1477 | memset(eid, 0, sizeof(regid)); |
1478 | strcpy(eid->ident, UDF_ID_DEVELOPER); | |
1479 | eid->identSuffix[0] = UDF_OS_CLASS_UNIX; | |
1480 | eid->identSuffix[1] = UDF_OS_ID_LINUX; | |
1481 | dsea->majorDeviceIdent = cpu_to_le32(imajor(inode)); | |
1482 | dsea->minorDeviceIdent = cpu_to_le32(iminor(inode)); | |
1483 | } | |
1484 | ||
48d6d8ff | 1485 | if (iinfo->i_efe == 0) { |
c0b34438 | 1486 | memcpy(bh->b_data + sizeof(struct fileEntry), |
48d6d8ff | 1487 | iinfo->i_ext.i_data, |
cb00ea35 | 1488 | inode->i_sb->s_blocksize - sizeof(struct fileEntry)); |
28de7948 | 1489 | fe->logicalBlocksRecorded = cpu_to_le64( |
4b11111a MS |
1490 | (inode->i_blocks + (1 << (blocksize_bits - 9)) - 1) >> |
1491 | (blocksize_bits - 9)); | |
1da177e4 | 1492 | |
56774805 MS |
1493 | udf_time_to_disk_stamp(&fe->accessTime, inode->i_atime); |
1494 | udf_time_to_disk_stamp(&fe->modificationTime, inode->i_mtime); | |
1495 | udf_time_to_disk_stamp(&fe->attrTime, inode->i_ctime); | |
1da177e4 LT |
1496 | memset(&(fe->impIdent), 0, sizeof(regid)); |
1497 | strcpy(fe->impIdent.ident, UDF_ID_DEVELOPER); | |
1498 | fe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; | |
1499 | fe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; | |
48d6d8ff MS |
1500 | fe->uniqueID = cpu_to_le64(iinfo->i_unique); |
1501 | fe->lengthExtendedAttr = cpu_to_le32(iinfo->i_lenEAttr); | |
1502 | fe->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc); | |
1da177e4 LT |
1503 | fe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_FE); |
1504 | crclen = sizeof(struct fileEntry); | |
cb00ea35 | 1505 | } else { |
4b11111a | 1506 | memcpy(bh->b_data + sizeof(struct extendedFileEntry), |
48d6d8ff | 1507 | iinfo->i_ext.i_data, |
4b11111a MS |
1508 | inode->i_sb->s_blocksize - |
1509 | sizeof(struct extendedFileEntry)); | |
1da177e4 | 1510 | efe->objectSize = cpu_to_le64(inode->i_size); |
28de7948 | 1511 | efe->logicalBlocksRecorded = cpu_to_le64( |
4b11111a MS |
1512 | (inode->i_blocks + (1 << (blocksize_bits - 9)) - 1) >> |
1513 | (blocksize_bits - 9)); | |
1da177e4 | 1514 | |
48d6d8ff MS |
1515 | if (iinfo->i_crtime.tv_sec > inode->i_atime.tv_sec || |
1516 | (iinfo->i_crtime.tv_sec == inode->i_atime.tv_sec && | |
1517 | iinfo->i_crtime.tv_nsec > inode->i_atime.tv_nsec)) | |
1518 | iinfo->i_crtime = inode->i_atime; | |
4b11111a | 1519 | |
48d6d8ff MS |
1520 | if (iinfo->i_crtime.tv_sec > inode->i_mtime.tv_sec || |
1521 | (iinfo->i_crtime.tv_sec == inode->i_mtime.tv_sec && | |
1522 | iinfo->i_crtime.tv_nsec > inode->i_mtime.tv_nsec)) | |
1523 | iinfo->i_crtime = inode->i_mtime; | |
4b11111a | 1524 | |
48d6d8ff MS |
1525 | if (iinfo->i_crtime.tv_sec > inode->i_ctime.tv_sec || |
1526 | (iinfo->i_crtime.tv_sec == inode->i_ctime.tv_sec && | |
1527 | iinfo->i_crtime.tv_nsec > inode->i_ctime.tv_nsec)) | |
1528 | iinfo->i_crtime = inode->i_ctime; | |
1da177e4 | 1529 | |
56774805 MS |
1530 | udf_time_to_disk_stamp(&efe->accessTime, inode->i_atime); |
1531 | udf_time_to_disk_stamp(&efe->modificationTime, inode->i_mtime); | |
1532 | udf_time_to_disk_stamp(&efe->createTime, iinfo->i_crtime); | |
1533 | udf_time_to_disk_stamp(&efe->attrTime, inode->i_ctime); | |
1da177e4 LT |
1534 | |
1535 | memset(&(efe->impIdent), 0, sizeof(regid)); | |
1536 | strcpy(efe->impIdent.ident, UDF_ID_DEVELOPER); | |
1537 | efe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; | |
1538 | efe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; | |
48d6d8ff MS |
1539 | efe->uniqueID = cpu_to_le64(iinfo->i_unique); |
1540 | efe->lengthExtendedAttr = cpu_to_le32(iinfo->i_lenEAttr); | |
1541 | efe->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc); | |
1da177e4 LT |
1542 | efe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_EFE); |
1543 | crclen = sizeof(struct extendedFileEntry); | |
1544 | } | |
48d6d8ff | 1545 | if (iinfo->i_strat4096) { |
1da177e4 LT |
1546 | fe->icbTag.strategyType = cpu_to_le16(4096); |
1547 | fe->icbTag.strategyParameter = cpu_to_le16(1); | |
1548 | fe->icbTag.numEntries = cpu_to_le16(2); | |
cb00ea35 | 1549 | } else { |
1da177e4 LT |
1550 | fe->icbTag.strategyType = cpu_to_le16(4); |
1551 | fe->icbTag.numEntries = cpu_to_le16(1); | |
1552 | } | |
1553 | ||
1554 | if (S_ISDIR(inode->i_mode)) | |
1555 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_DIRECTORY; | |
1556 | else if (S_ISREG(inode->i_mode)) | |
1557 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_REGULAR; | |
1558 | else if (S_ISLNK(inode->i_mode)) | |
1559 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_SYMLINK; | |
1560 | else if (S_ISBLK(inode->i_mode)) | |
1561 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_BLOCK; | |
1562 | else if (S_ISCHR(inode->i_mode)) | |
1563 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_CHAR; | |
1564 | else if (S_ISFIFO(inode->i_mode)) | |
1565 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_FIFO; | |
1566 | else if (S_ISSOCK(inode->i_mode)) | |
1567 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_SOCKET; | |
1568 | ||
48d6d8ff | 1569 | icbflags = iinfo->i_alloc_type | |
28de7948 CG |
1570 | ((inode->i_mode & S_ISUID) ? ICBTAG_FLAG_SETUID : 0) | |
1571 | ((inode->i_mode & S_ISGID) ? ICBTAG_FLAG_SETGID : 0) | | |
1572 | ((inode->i_mode & S_ISVTX) ? ICBTAG_FLAG_STICKY : 0) | | |
1573 | (le16_to_cpu(fe->icbTag.flags) & | |
1574 | ~(ICBTAG_FLAG_AD_MASK | ICBTAG_FLAG_SETUID | | |
1575 | ICBTAG_FLAG_SETGID | ICBTAG_FLAG_STICKY)); | |
1da177e4 LT |
1576 | |
1577 | fe->icbTag.flags = cpu_to_le16(icbflags); | |
6c79e987 | 1578 | if (sbi->s_udfrev >= 0x0200) |
1da177e4 LT |
1579 | fe->descTag.descVersion = cpu_to_le16(3); |
1580 | else | |
1581 | fe->descTag.descVersion = cpu_to_le16(2); | |
6c79e987 | 1582 | fe->descTag.tagSerialNum = cpu_to_le16(sbi->s_serial_number); |
4b11111a | 1583 | fe->descTag.tagLocation = cpu_to_le32( |
48d6d8ff MS |
1584 | iinfo->i_location.logicalBlockNum); |
1585 | crclen += iinfo->i_lenEAttr + iinfo->i_lenAlloc - | |
c0b34438 | 1586 | sizeof(tag); |
1da177e4 | 1587 | fe->descTag.descCRCLength = cpu_to_le16(crclen); |
f845fced BC |
1588 | fe->descTag.descCRC = cpu_to_le16(crc_itu_t(0, (char *)fe + sizeof(tag), |
1589 | crclen)); | |
3f2587bb | 1590 | fe->descTag.tagChecksum = udf_tag_checksum(&fe->descTag); |
1da177e4 LT |
1591 | |
1592 | /* write the data blocks */ | |
1593 | mark_buffer_dirty(bh); | |
cb00ea35 | 1594 | if (do_sync) { |
1da177e4 | 1595 | sync_dirty_buffer(bh); |
cb00ea35 | 1596 | if (buffer_req(bh) && !buffer_uptodate(bh)) { |
4b11111a MS |
1597 | printk(KERN_WARNING "IO error syncing udf inode " |
1598 | "[%s:%08lx]\n", inode->i_sb->s_id, | |
1599 | inode->i_ino); | |
1da177e4 LT |
1600 | err = -EIO; |
1601 | } | |
1602 | } | |
3bf25cb4 | 1603 | brelse(bh); |
28de7948 | 1604 | |
1da177e4 LT |
1605 | return err; |
1606 | } | |
1607 | ||
cb00ea35 | 1608 | struct inode *udf_iget(struct super_block *sb, kernel_lb_addr ino) |
1da177e4 LT |
1609 | { |
1610 | unsigned long block = udf_get_lb_pblock(sb, ino, 0); | |
1611 | struct inode *inode = iget_locked(sb, block); | |
1612 | ||
1613 | if (!inode) | |
1614 | return NULL; | |
1615 | ||
1616 | if (inode->i_state & I_NEW) { | |
c0b34438 | 1617 | memcpy(&UDF_I(inode)->i_location, &ino, sizeof(kernel_lb_addr)); |
1da177e4 LT |
1618 | __udf_read_inode(inode); |
1619 | unlock_new_inode(inode); | |
1620 | } | |
1621 | ||
1622 | if (is_bad_inode(inode)) | |
1623 | goto out_iput; | |
1624 | ||
4b11111a MS |
1625 | if (ino.logicalBlockNum >= UDF_SB(sb)-> |
1626 | s_partmaps[ino.partitionReferenceNum].s_partition_len) { | |
1da177e4 | 1627 | udf_debug("block=%d, partition=%d out of range\n", |
cb00ea35 | 1628 | ino.logicalBlockNum, ino.partitionReferenceNum); |
1da177e4 LT |
1629 | make_bad_inode(inode); |
1630 | goto out_iput; | |
1631 | } | |
1632 | ||
1633 | return inode; | |
1634 | ||
28de7948 | 1635 | out_iput: |
1da177e4 LT |
1636 | iput(inode); |
1637 | return NULL; | |
1638 | } | |
1639 | ||
4b11111a | 1640 | int8_t udf_add_aext(struct inode *inode, struct extent_position *epos, |
cb00ea35 | 1641 | kernel_lb_addr eloc, uint32_t elen, int inc) |
1da177e4 LT |
1642 | { |
1643 | int adsize; | |
1644 | short_ad *sad = NULL; | |
1645 | long_ad *lad = NULL; | |
1646 | struct allocExtDesc *aed; | |
1647 | int8_t etype; | |
1648 | uint8_t *ptr; | |
48d6d8ff | 1649 | struct udf_inode_info *iinfo = UDF_I(inode); |
1da177e4 | 1650 | |
ff116fc8 | 1651 | if (!epos->bh) |
48d6d8ff | 1652 | ptr = iinfo->i_ext.i_data + epos->offset - |
4b11111a | 1653 | udf_file_entry_alloc_offset(inode) + |
48d6d8ff | 1654 | iinfo->i_lenEAttr; |
1da177e4 | 1655 | else |
ff116fc8 | 1656 | ptr = epos->bh->b_data + epos->offset; |
1da177e4 | 1657 | |
48d6d8ff | 1658 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
1da177e4 | 1659 | adsize = sizeof(short_ad); |
48d6d8ff | 1660 | else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
1da177e4 LT |
1661 | adsize = sizeof(long_ad); |
1662 | else | |
1663 | return -1; | |
1664 | ||
cb00ea35 | 1665 | if (epos->offset + (2 * adsize) > inode->i_sb->s_blocksize) { |
1da177e4 LT |
1666 | char *sptr, *dptr; |
1667 | struct buffer_head *nbh; | |
1668 | int err, loffset; | |
ff116fc8 | 1669 | kernel_lb_addr obloc = epos->block; |
1da177e4 | 1670 | |
4b11111a MS |
1671 | epos->block.logicalBlockNum = udf_new_block(inode->i_sb, NULL, |
1672 | obloc.partitionReferenceNum, | |
1673 | obloc.logicalBlockNum, &err); | |
1674 | if (!epos->block.logicalBlockNum) | |
1da177e4 | 1675 | return -1; |
4b11111a MS |
1676 | nbh = udf_tgetblk(inode->i_sb, udf_get_lb_pblock(inode->i_sb, |
1677 | epos->block, | |
1678 | 0)); | |
1679 | if (!nbh) | |
1da177e4 | 1680 | return -1; |
1da177e4 LT |
1681 | lock_buffer(nbh); |
1682 | memset(nbh->b_data, 0x00, inode->i_sb->s_blocksize); | |
1683 | set_buffer_uptodate(nbh); | |
1684 | unlock_buffer(nbh); | |
1685 | mark_buffer_dirty_inode(nbh, inode); | |
1686 | ||
1687 | aed = (struct allocExtDesc *)(nbh->b_data); | |
1688 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT)) | |
4b11111a MS |
1689 | aed->previousAllocExtLocation = |
1690 | cpu_to_le32(obloc.logicalBlockNum); | |
cb00ea35 | 1691 | if (epos->offset + adsize > inode->i_sb->s_blocksize) { |
ff116fc8 | 1692 | loffset = epos->offset; |
1da177e4 LT |
1693 | aed->lengthAllocDescs = cpu_to_le32(adsize); |
1694 | sptr = ptr - adsize; | |
1695 | dptr = nbh->b_data + sizeof(struct allocExtDesc); | |
1696 | memcpy(dptr, sptr, adsize); | |
ff116fc8 | 1697 | epos->offset = sizeof(struct allocExtDesc) + adsize; |
cb00ea35 | 1698 | } else { |
ff116fc8 | 1699 | loffset = epos->offset + adsize; |
1da177e4 LT |
1700 | aed->lengthAllocDescs = cpu_to_le32(0); |
1701 | sptr = ptr; | |
ff116fc8 | 1702 | epos->offset = sizeof(struct allocExtDesc); |
1da177e4 | 1703 | |
cb00ea35 | 1704 | if (epos->bh) { |
ff116fc8 | 1705 | aed = (struct allocExtDesc *)epos->bh->b_data; |
c2104fda | 1706 | le32_add_cpu(&aed->lengthAllocDescs, adsize); |
cb00ea35 | 1707 | } else { |
48d6d8ff | 1708 | iinfo->i_lenAlloc += adsize; |
1da177e4 LT |
1709 | mark_inode_dirty(inode); |
1710 | } | |
1711 | } | |
6c79e987 | 1712 | if (UDF_SB(inode->i_sb)->s_udfrev >= 0x0200) |
1da177e4 | 1713 | udf_new_tag(nbh->b_data, TAG_IDENT_AED, 3, 1, |
cb00ea35 | 1714 | epos->block.logicalBlockNum, sizeof(tag)); |
1da177e4 LT |
1715 | else |
1716 | udf_new_tag(nbh->b_data, TAG_IDENT_AED, 2, 1, | |
cb00ea35 | 1717 | epos->block.logicalBlockNum, sizeof(tag)); |
48d6d8ff | 1718 | switch (iinfo->i_alloc_type) { |
cb00ea35 | 1719 | case ICBTAG_FLAG_AD_SHORT: |
28de7948 CG |
1720 | sad = (short_ad *)sptr; |
1721 | sad->extLength = cpu_to_le32(EXT_NEXT_EXTENT_ALLOCDECS | | |
1722 | inode->i_sb->s_blocksize); | |
4b11111a MS |
1723 | sad->extPosition = |
1724 | cpu_to_le32(epos->block.logicalBlockNum); | |
28de7948 | 1725 | break; |
cb00ea35 | 1726 | case ICBTAG_FLAG_AD_LONG: |
28de7948 CG |
1727 | lad = (long_ad *)sptr; |
1728 | lad->extLength = cpu_to_le32(EXT_NEXT_EXTENT_ALLOCDECS | | |
1729 | inode->i_sb->s_blocksize); | |
1730 | lad->extLocation = cpu_to_lelb(epos->block); | |
1731 | memset(lad->impUse, 0x00, sizeof(lad->impUse)); | |
1732 | break; | |
1da177e4 | 1733 | } |
cb00ea35 | 1734 | if (epos->bh) { |
28de7948 | 1735 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
6c79e987 | 1736 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) |
ff116fc8 | 1737 | udf_update_tag(epos->bh->b_data, loffset); |
1da177e4 | 1738 | else |
4b11111a MS |
1739 | udf_update_tag(epos->bh->b_data, |
1740 | sizeof(struct allocExtDesc)); | |
ff116fc8 | 1741 | mark_buffer_dirty_inode(epos->bh, inode); |
3bf25cb4 | 1742 | brelse(epos->bh); |
28de7948 | 1743 | } else { |
1da177e4 | 1744 | mark_inode_dirty(inode); |
28de7948 | 1745 | } |
ff116fc8 | 1746 | epos->bh = nbh; |
1da177e4 LT |
1747 | } |
1748 | ||
ff116fc8 | 1749 | etype = udf_write_aext(inode, epos, eloc, elen, inc); |
1da177e4 | 1750 | |
cb00ea35 | 1751 | if (!epos->bh) { |
48d6d8ff | 1752 | iinfo->i_lenAlloc += adsize; |
1da177e4 | 1753 | mark_inode_dirty(inode); |
cb00ea35 | 1754 | } else { |
ff116fc8 | 1755 | aed = (struct allocExtDesc *)epos->bh->b_data; |
c2104fda | 1756 | le32_add_cpu(&aed->lengthAllocDescs, adsize); |
4b11111a MS |
1757 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
1758 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) | |
1759 | udf_update_tag(epos->bh->b_data, | |
1760 | epos->offset + (inc ? 0 : adsize)); | |
1da177e4 | 1761 | else |
4b11111a MS |
1762 | udf_update_tag(epos->bh->b_data, |
1763 | sizeof(struct allocExtDesc)); | |
ff116fc8 | 1764 | mark_buffer_dirty_inode(epos->bh, inode); |
1da177e4 LT |
1765 | } |
1766 | ||
1767 | return etype; | |
1768 | } | |
1769 | ||
4b11111a | 1770 | int8_t udf_write_aext(struct inode *inode, struct extent_position *epos, |
cb00ea35 | 1771 | kernel_lb_addr eloc, uint32_t elen, int inc) |
1da177e4 LT |
1772 | { |
1773 | int adsize; | |
1774 | uint8_t *ptr; | |
28de7948 CG |
1775 | short_ad *sad; |
1776 | long_ad *lad; | |
48d6d8ff | 1777 | struct udf_inode_info *iinfo = UDF_I(inode); |
1da177e4 | 1778 | |
ff116fc8 | 1779 | if (!epos->bh) |
48d6d8ff | 1780 | ptr = iinfo->i_ext.i_data + epos->offset - |
4b11111a | 1781 | udf_file_entry_alloc_offset(inode) + |
48d6d8ff | 1782 | iinfo->i_lenEAttr; |
1da177e4 | 1783 | else |
ff116fc8 | 1784 | ptr = epos->bh->b_data + epos->offset; |
1da177e4 | 1785 | |
48d6d8ff | 1786 | switch (iinfo->i_alloc_type) { |
cb00ea35 | 1787 | case ICBTAG_FLAG_AD_SHORT: |
28de7948 CG |
1788 | sad = (short_ad *)ptr; |
1789 | sad->extLength = cpu_to_le32(elen); | |
1790 | sad->extPosition = cpu_to_le32(eloc.logicalBlockNum); | |
1791 | adsize = sizeof(short_ad); | |
1792 | break; | |
cb00ea35 | 1793 | case ICBTAG_FLAG_AD_LONG: |
28de7948 CG |
1794 | lad = (long_ad *)ptr; |
1795 | lad->extLength = cpu_to_le32(elen); | |
1796 | lad->extLocation = cpu_to_lelb(eloc); | |
1797 | memset(lad->impUse, 0x00, sizeof(lad->impUse)); | |
1798 | adsize = sizeof(long_ad); | |
1799 | break; | |
cb00ea35 CG |
1800 | default: |
1801 | return -1; | |
1da177e4 LT |
1802 | } |
1803 | ||
cb00ea35 | 1804 | if (epos->bh) { |
28de7948 | 1805 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
6c79e987 | 1806 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) { |
4b11111a MS |
1807 | struct allocExtDesc *aed = |
1808 | (struct allocExtDesc *)epos->bh->b_data; | |
ff116fc8 | 1809 | udf_update_tag(epos->bh->b_data, |
4b11111a MS |
1810 | le32_to_cpu(aed->lengthAllocDescs) + |
1811 | sizeof(struct allocExtDesc)); | |
1da177e4 | 1812 | } |
ff116fc8 | 1813 | mark_buffer_dirty_inode(epos->bh, inode); |
28de7948 | 1814 | } else { |
1da177e4 | 1815 | mark_inode_dirty(inode); |
28de7948 | 1816 | } |
1da177e4 LT |
1817 | |
1818 | if (inc) | |
ff116fc8 | 1819 | epos->offset += adsize; |
28de7948 | 1820 | |
1da177e4 LT |
1821 | return (elen >> 30); |
1822 | } | |
1823 | ||
4b11111a MS |
1824 | int8_t udf_next_aext(struct inode *inode, struct extent_position *epos, |
1825 | kernel_lb_addr *eloc, uint32_t *elen, int inc) | |
1da177e4 LT |
1826 | { |
1827 | int8_t etype; | |
1828 | ||
ff116fc8 | 1829 | while ((etype = udf_current_aext(inode, epos, eloc, elen, inc)) == |
cb00ea35 | 1830 | (EXT_NEXT_EXTENT_ALLOCDECS >> 30)) { |
4b11111a | 1831 | int block; |
ff116fc8 JK |
1832 | epos->block = *eloc; |
1833 | epos->offset = sizeof(struct allocExtDesc); | |
3bf25cb4 | 1834 | brelse(epos->bh); |
4b11111a MS |
1835 | block = udf_get_lb_pblock(inode->i_sb, epos->block, 0); |
1836 | epos->bh = udf_tread(inode->i_sb, block); | |
1837 | if (!epos->bh) { | |
1838 | udf_debug("reading block %d failed!\n", block); | |
1da177e4 LT |
1839 | return -1; |
1840 | } | |
1841 | } | |
1842 | ||
1843 | return etype; | |
1844 | } | |
1845 | ||
4b11111a MS |
1846 | int8_t udf_current_aext(struct inode *inode, struct extent_position *epos, |
1847 | kernel_lb_addr *eloc, uint32_t *elen, int inc) | |
1da177e4 LT |
1848 | { |
1849 | int alen; | |
1850 | int8_t etype; | |
1851 | uint8_t *ptr; | |
28de7948 CG |
1852 | short_ad *sad; |
1853 | long_ad *lad; | |
48d6d8ff | 1854 | struct udf_inode_info *iinfo = UDF_I(inode); |
28de7948 | 1855 | |
cb00ea35 | 1856 | if (!epos->bh) { |
ff116fc8 JK |
1857 | if (!epos->offset) |
1858 | epos->offset = udf_file_entry_alloc_offset(inode); | |
48d6d8ff | 1859 | ptr = iinfo->i_ext.i_data + epos->offset - |
4b11111a | 1860 | udf_file_entry_alloc_offset(inode) + |
48d6d8ff | 1861 | iinfo->i_lenEAttr; |
4b11111a | 1862 | alen = udf_file_entry_alloc_offset(inode) + |
48d6d8ff | 1863 | iinfo->i_lenAlloc; |
cb00ea35 | 1864 | } else { |
ff116fc8 JK |
1865 | if (!epos->offset) |
1866 | epos->offset = sizeof(struct allocExtDesc); | |
1867 | ptr = epos->bh->b_data + epos->offset; | |
28de7948 | 1868 | alen = sizeof(struct allocExtDesc) + |
4b11111a MS |
1869 | le32_to_cpu(((struct allocExtDesc *)epos->bh->b_data)-> |
1870 | lengthAllocDescs); | |
1da177e4 LT |
1871 | } |
1872 | ||
48d6d8ff | 1873 | switch (iinfo->i_alloc_type) { |
cb00ea35 | 1874 | case ICBTAG_FLAG_AD_SHORT: |
4b11111a MS |
1875 | sad = udf_get_fileshortad(ptr, alen, &epos->offset, inc); |
1876 | if (!sad) | |
28de7948 CG |
1877 | return -1; |
1878 | etype = le32_to_cpu(sad->extLength) >> 30; | |
1879 | eloc->logicalBlockNum = le32_to_cpu(sad->extPosition); | |
4b11111a | 1880 | eloc->partitionReferenceNum = |
48d6d8ff | 1881 | iinfo->i_location.partitionReferenceNum; |
28de7948 CG |
1882 | *elen = le32_to_cpu(sad->extLength) & UDF_EXTENT_LENGTH_MASK; |
1883 | break; | |
cb00ea35 | 1884 | case ICBTAG_FLAG_AD_LONG: |
4b11111a MS |
1885 | lad = udf_get_filelongad(ptr, alen, &epos->offset, inc); |
1886 | if (!lad) | |
1da177e4 | 1887 | return -1; |
28de7948 CG |
1888 | etype = le32_to_cpu(lad->extLength) >> 30; |
1889 | *eloc = lelb_to_cpu(lad->extLocation); | |
1890 | *elen = le32_to_cpu(lad->extLength) & UDF_EXTENT_LENGTH_MASK; | |
1891 | break; | |
1892 | default: | |
4b11111a | 1893 | udf_debug("alloc_type = %d unsupported\n", |
48d6d8ff | 1894 | iinfo->i_alloc_type); |
28de7948 | 1895 | return -1; |
1da177e4 LT |
1896 | } |
1897 | ||
1898 | return etype; | |
1899 | } | |
1900 | ||
28de7948 CG |
1901 | static int8_t udf_insert_aext(struct inode *inode, struct extent_position epos, |
1902 | kernel_lb_addr neloc, uint32_t nelen) | |
1da177e4 LT |
1903 | { |
1904 | kernel_lb_addr oeloc; | |
1905 | uint32_t oelen; | |
1906 | int8_t etype; | |
1907 | ||
ff116fc8 | 1908 | if (epos.bh) |
3bf25cb4 | 1909 | get_bh(epos.bh); |
1da177e4 | 1910 | |
cb00ea35 | 1911 | while ((etype = udf_next_aext(inode, &epos, &oeloc, &oelen, 0)) != -1) { |
ff116fc8 | 1912 | udf_write_aext(inode, &epos, neloc, nelen, 1); |
1da177e4 LT |
1913 | neloc = oeloc; |
1914 | nelen = (etype << 30) | oelen; | |
1915 | } | |
ff116fc8 | 1916 | udf_add_aext(inode, &epos, neloc, nelen, 1); |
3bf25cb4 | 1917 | brelse(epos.bh); |
28de7948 | 1918 | |
1da177e4 LT |
1919 | return (nelen >> 30); |
1920 | } | |
1921 | ||
4b11111a | 1922 | int8_t udf_delete_aext(struct inode *inode, struct extent_position epos, |
cb00ea35 | 1923 | kernel_lb_addr eloc, uint32_t elen) |
1da177e4 | 1924 | { |
ff116fc8 JK |
1925 | struct extent_position oepos; |
1926 | int adsize; | |
1da177e4 LT |
1927 | int8_t etype; |
1928 | struct allocExtDesc *aed; | |
48d6d8ff | 1929 | struct udf_inode_info *iinfo; |
1da177e4 | 1930 | |
cb00ea35 | 1931 | if (epos.bh) { |
3bf25cb4 JK |
1932 | get_bh(epos.bh); |
1933 | get_bh(epos.bh); | |
1da177e4 LT |
1934 | } |
1935 | ||
48d6d8ff MS |
1936 | iinfo = UDF_I(inode); |
1937 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) | |
1da177e4 | 1938 | adsize = sizeof(short_ad); |
48d6d8ff | 1939 | else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
1da177e4 LT |
1940 | adsize = sizeof(long_ad); |
1941 | else | |
1942 | adsize = 0; | |
1943 | ||
ff116fc8 JK |
1944 | oepos = epos; |
1945 | if (udf_next_aext(inode, &epos, &eloc, &elen, 1) == -1) | |
1da177e4 LT |
1946 | return -1; |
1947 | ||
cb00ea35 | 1948 | while ((etype = udf_next_aext(inode, &epos, &eloc, &elen, 1)) != -1) { |
ff116fc8 | 1949 | udf_write_aext(inode, &oepos, eloc, (etype << 30) | elen, 1); |
cb00ea35 | 1950 | if (oepos.bh != epos.bh) { |
ff116fc8 | 1951 | oepos.block = epos.block; |
3bf25cb4 JK |
1952 | brelse(oepos.bh); |
1953 | get_bh(epos.bh); | |
ff116fc8 JK |
1954 | oepos.bh = epos.bh; |
1955 | oepos.offset = epos.offset - adsize; | |
1da177e4 LT |
1956 | } |
1957 | } | |
1958 | memset(&eloc, 0x00, sizeof(kernel_lb_addr)); | |
1959 | elen = 0; | |
1960 | ||
cb00ea35 | 1961 | if (epos.bh != oepos.bh) { |
ff116fc8 JK |
1962 | udf_free_blocks(inode->i_sb, inode, epos.block, 0, 1); |
1963 | udf_write_aext(inode, &oepos, eloc, elen, 1); | |
1964 | udf_write_aext(inode, &oepos, eloc, elen, 1); | |
cb00ea35 | 1965 | if (!oepos.bh) { |
48d6d8ff | 1966 | iinfo->i_lenAlloc -= (adsize * 2); |
1da177e4 | 1967 | mark_inode_dirty(inode); |
cb00ea35 | 1968 | } else { |
ff116fc8 | 1969 | aed = (struct allocExtDesc *)oepos.bh->b_data; |
c2104fda | 1970 | le32_add_cpu(&aed->lengthAllocDescs, -(2 * adsize)); |
28de7948 | 1971 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
6c79e987 | 1972 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) |
4b11111a MS |
1973 | udf_update_tag(oepos.bh->b_data, |
1974 | oepos.offset - (2 * adsize)); | |
1da177e4 | 1975 | else |
4b11111a MS |
1976 | udf_update_tag(oepos.bh->b_data, |
1977 | sizeof(struct allocExtDesc)); | |
ff116fc8 | 1978 | mark_buffer_dirty_inode(oepos.bh, inode); |
1da177e4 | 1979 | } |
cb00ea35 | 1980 | } else { |
ff116fc8 | 1981 | udf_write_aext(inode, &oepos, eloc, elen, 1); |
cb00ea35 | 1982 | if (!oepos.bh) { |
48d6d8ff | 1983 | iinfo->i_lenAlloc -= adsize; |
1da177e4 | 1984 | mark_inode_dirty(inode); |
cb00ea35 | 1985 | } else { |
ff116fc8 | 1986 | aed = (struct allocExtDesc *)oepos.bh->b_data; |
c2104fda | 1987 | le32_add_cpu(&aed->lengthAllocDescs, -adsize); |
28de7948 | 1988 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
6c79e987 | 1989 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) |
4b11111a MS |
1990 | udf_update_tag(oepos.bh->b_data, |
1991 | epos.offset - adsize); | |
1da177e4 | 1992 | else |
4b11111a MS |
1993 | udf_update_tag(oepos.bh->b_data, |
1994 | sizeof(struct allocExtDesc)); | |
ff116fc8 | 1995 | mark_buffer_dirty_inode(oepos.bh, inode); |
1da177e4 LT |
1996 | } |
1997 | } | |
647bd61a | 1998 | |
3bf25cb4 JK |
1999 | brelse(epos.bh); |
2000 | brelse(oepos.bh); | |
28de7948 | 2001 | |
1da177e4 LT |
2002 | return (elen >> 30); |
2003 | } | |
2004 | ||
4b11111a MS |
2005 | int8_t inode_bmap(struct inode *inode, sector_t block, |
2006 | struct extent_position *pos, kernel_lb_addr *eloc, | |
2007 | uint32_t *elen, sector_t *offset) | |
1da177e4 | 2008 | { |
4b11111a | 2009 | unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; |
cb00ea35 | 2010 | loff_t lbcount = 0, bcount = |
4b11111a | 2011 | (loff_t) block << blocksize_bits; |
1da177e4 | 2012 | int8_t etype; |
48d6d8ff | 2013 | struct udf_inode_info *iinfo; |
1da177e4 | 2014 | |
48d6d8ff | 2015 | iinfo = UDF_I(inode); |
ff116fc8 | 2016 | pos->offset = 0; |
48d6d8ff | 2017 | pos->block = iinfo->i_location; |
ff116fc8 | 2018 | pos->bh = NULL; |
1da177e4 | 2019 | *elen = 0; |
1da177e4 | 2020 | |
cb00ea35 | 2021 | do { |
4b11111a MS |
2022 | etype = udf_next_aext(inode, pos, eloc, elen, 1); |
2023 | if (etype == -1) { | |
2024 | *offset = (bcount - lbcount) >> blocksize_bits; | |
48d6d8ff | 2025 | iinfo->i_lenExtents = lbcount; |
1da177e4 LT |
2026 | return -1; |
2027 | } | |
2028 | lbcount += *elen; | |
2029 | } while (lbcount <= bcount); | |
2030 | ||
4b11111a | 2031 | *offset = (bcount + *elen - lbcount) >> blocksize_bits; |
1da177e4 LT |
2032 | |
2033 | return etype; | |
2034 | } | |
2035 | ||
60448b1d | 2036 | long udf_block_map(struct inode *inode, sector_t block) |
1da177e4 | 2037 | { |
ff116fc8 JK |
2038 | kernel_lb_addr eloc; |
2039 | uint32_t elen; | |
60448b1d | 2040 | sector_t offset; |
28de7948 | 2041 | struct extent_position epos = {}; |
1da177e4 LT |
2042 | int ret; |
2043 | ||
2044 | lock_kernel(); | |
2045 | ||
4b11111a MS |
2046 | if (inode_bmap(inode, block, &epos, &eloc, &elen, &offset) == |
2047 | (EXT_RECORDED_ALLOCATED >> 30)) | |
60448b1d | 2048 | ret = udf_get_lb_pblock(inode->i_sb, eloc, offset); |
1da177e4 LT |
2049 | else |
2050 | ret = 0; | |
2051 | ||
2052 | unlock_kernel(); | |
3bf25cb4 | 2053 | brelse(epos.bh); |
1da177e4 LT |
2054 | |
2055 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_VARCONV)) | |
2056 | return udf_fixed_to_variable(ret); | |
2057 | else | |
2058 | return ret; | |
2059 | } |