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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> | |
40 | ||
41 | #include "udf_i.h" | |
42 | #include "udf_sb.h" | |
43 | ||
44 | MODULE_AUTHOR("Ben Fennema"); | |
45 | MODULE_DESCRIPTION("Universal Disk Format Filesystem"); | |
46 | MODULE_LICENSE("GPL"); | |
47 | ||
48 | #define EXTENT_MERGE_SIZE 5 | |
49 | ||
50 | static mode_t udf_convert_permissions(struct fileEntry *); | |
51 | static int udf_update_inode(struct inode *, int); | |
52 | static void udf_fill_inode(struct inode *, struct buffer_head *); | |
647bd61a | 53 | static int udf_alloc_i_data(struct inode *inode, size_t size); |
60448b1d | 54 | static struct buffer_head *inode_getblk(struct inode *, sector_t, int *, |
cb00ea35 | 55 | long *, int *); |
ff116fc8 | 56 | static int8_t udf_insert_aext(struct inode *, struct extent_position, |
cb00ea35 | 57 | kernel_lb_addr, uint32_t); |
1da177e4 | 58 | static void udf_split_extents(struct inode *, int *, int, int, |
cb00ea35 | 59 | kernel_long_ad[EXTENT_MERGE_SIZE], int *); |
1da177e4 | 60 | static void udf_prealloc_extents(struct inode *, int, int, |
cb00ea35 | 61 | kernel_long_ad[EXTENT_MERGE_SIZE], int *); |
1da177e4 | 62 | static void udf_merge_extents(struct inode *, |
cb00ea35 | 63 | kernel_long_ad[EXTENT_MERGE_SIZE], int *); |
1da177e4 | 64 | static void udf_update_extents(struct inode *, |
cb00ea35 CG |
65 | kernel_long_ad[EXTENT_MERGE_SIZE], int, int, |
66 | struct extent_position *); | |
1da177e4 LT |
67 | static int udf_get_block(struct inode *, sector_t, struct buffer_head *, int); |
68 | ||
69 | /* | |
70 | * udf_delete_inode | |
71 | * | |
72 | * PURPOSE | |
73 | * Clean-up before the specified inode is destroyed. | |
74 | * | |
75 | * DESCRIPTION | |
76 | * This routine is called when the kernel destroys an inode structure | |
77 | * ie. when iput() finds i_count == 0. | |
78 | * | |
79 | * HISTORY | |
80 | * July 1, 1997 - Andrew E. Mileski | |
81 | * Written, tested, and released. | |
82 | * | |
83 | * Called at the last iput() if i_nlink is zero. | |
84 | */ | |
cb00ea35 | 85 | void udf_delete_inode(struct inode *inode) |
1da177e4 | 86 | { |
fef26658 MF |
87 | truncate_inode_pages(&inode->i_data, 0); |
88 | ||
1da177e4 LT |
89 | if (is_bad_inode(inode)) |
90 | goto no_delete; | |
91 | ||
92 | inode->i_size = 0; | |
93 | udf_truncate(inode); | |
94 | lock_kernel(); | |
95 | ||
96 | udf_update_inode(inode, IS_SYNC(inode)); | |
97 | udf_free_inode(inode); | |
98 | ||
99 | unlock_kernel(); | |
100 | return; | |
28de7948 CG |
101 | |
102 | no_delete: | |
1da177e4 LT |
103 | clear_inode(inode); |
104 | } | |
105 | ||
74584ae5 JK |
106 | /* |
107 | * If we are going to release inode from memory, we discard preallocation and | |
108 | * truncate last inode extent to proper length. We could use drop_inode() but | |
109 | * it's called under inode_lock and thus we cannot mark inode dirty there. We | |
110 | * use clear_inode() but we have to make sure to write inode as it's not written | |
111 | * automatically. | |
112 | */ | |
1da177e4 LT |
113 | void udf_clear_inode(struct inode *inode) |
114 | { | |
115 | if (!(inode->i_sb->s_flags & MS_RDONLY)) { | |
116 | lock_kernel(); | |
74584ae5 | 117 | /* Discard preallocation for directories, symlinks, etc. */ |
1da177e4 | 118 | udf_discard_prealloc(inode); |
74584ae5 | 119 | udf_truncate_tail_extent(inode); |
1da177e4 | 120 | unlock_kernel(); |
74584ae5 | 121 | write_inode_now(inode, 1); |
1da177e4 | 122 | } |
1da177e4 LT |
123 | kfree(UDF_I_DATA(inode)); |
124 | UDF_I_DATA(inode) = NULL; | |
125 | } | |
126 | ||
127 | static int udf_writepage(struct page *page, struct writeback_control *wbc) | |
128 | { | |
129 | return block_write_full_page(page, udf_get_block, wbc); | |
130 | } | |
131 | ||
132 | static int udf_readpage(struct file *file, struct page *page) | |
133 | { | |
134 | return block_read_full_page(page, udf_get_block); | |
135 | } | |
136 | ||
be021ee4 NP |
137 | static int udf_write_begin(struct file *file, struct address_space *mapping, |
138 | loff_t pos, unsigned len, unsigned flags, | |
139 | struct page **pagep, void **fsdata) | |
1da177e4 | 140 | { |
be021ee4 NP |
141 | *pagep = NULL; |
142 | return block_write_begin(file, mapping, pos, len, flags, pagep, fsdata, | |
143 | udf_get_block); | |
1da177e4 LT |
144 | } |
145 | ||
146 | static sector_t udf_bmap(struct address_space *mapping, sector_t block) | |
147 | { | |
cb00ea35 | 148 | return generic_block_bmap(mapping, block, udf_get_block); |
1da177e4 LT |
149 | } |
150 | ||
f5e54d6e | 151 | const struct address_space_operations udf_aops = { |
28de7948 CG |
152 | .readpage = udf_readpage, |
153 | .writepage = udf_writepage, | |
154 | .sync_page = block_sync_page, | |
be021ee4 NP |
155 | .write_begin = udf_write_begin, |
156 | .write_end = generic_write_end, | |
28de7948 | 157 | .bmap = udf_bmap, |
1da177e4 LT |
158 | }; |
159 | ||
cb00ea35 | 160 | void udf_expand_file_adinicb(struct inode *inode, int newsize, int *err) |
1da177e4 LT |
161 | { |
162 | struct page *page; | |
163 | char *kaddr; | |
164 | struct writeback_control udf_wbc = { | |
165 | .sync_mode = WB_SYNC_NONE, | |
166 | .nr_to_write = 1, | |
167 | }; | |
168 | ||
169 | /* from now on we have normal address_space methods */ | |
170 | inode->i_data.a_ops = &udf_aops; | |
171 | ||
cb00ea35 | 172 | if (!UDF_I_LENALLOC(inode)) { |
1da177e4 LT |
173 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) |
174 | UDF_I_ALLOCTYPE(inode) = ICBTAG_FLAG_AD_SHORT; | |
175 | else | |
176 | UDF_I_ALLOCTYPE(inode) = ICBTAG_FLAG_AD_LONG; | |
177 | mark_inode_dirty(inode); | |
178 | return; | |
179 | } | |
180 | ||
181 | page = grab_cache_page(inode->i_mapping, 0); | |
cd7619d6 MM |
182 | BUG_ON(!PageLocked(page)); |
183 | ||
cb00ea35 | 184 | if (!PageUptodate(page)) { |
1da177e4 LT |
185 | kaddr = kmap(page); |
186 | memset(kaddr + UDF_I_LENALLOC(inode), 0x00, | |
cb00ea35 | 187 | PAGE_CACHE_SIZE - UDF_I_LENALLOC(inode)); |
1da177e4 | 188 | memcpy(kaddr, UDF_I_DATA(inode) + UDF_I_LENEATTR(inode), |
cb00ea35 | 189 | UDF_I_LENALLOC(inode)); |
1da177e4 LT |
190 | flush_dcache_page(page); |
191 | SetPageUptodate(page); | |
192 | kunmap(page); | |
193 | } | |
194 | memset(UDF_I_DATA(inode) + UDF_I_LENEATTR(inode), 0x00, | |
cb00ea35 | 195 | UDF_I_LENALLOC(inode)); |
1da177e4 LT |
196 | UDF_I_LENALLOC(inode) = 0; |
197 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) | |
198 | UDF_I_ALLOCTYPE(inode) = ICBTAG_FLAG_AD_SHORT; | |
199 | else | |
200 | UDF_I_ALLOCTYPE(inode) = ICBTAG_FLAG_AD_LONG; | |
201 | ||
202 | inode->i_data.a_ops->writepage(page, &udf_wbc); | |
203 | page_cache_release(page); | |
204 | ||
205 | mark_inode_dirty(inode); | |
206 | } | |
207 | ||
cb00ea35 CG |
208 | struct buffer_head *udf_expand_dir_adinicb(struct inode *inode, int *block, |
209 | int *err) | |
1da177e4 LT |
210 | { |
211 | int newblock; | |
ff116fc8 JK |
212 | struct buffer_head *dbh = NULL; |
213 | kernel_lb_addr eloc; | |
214 | uint32_t elen; | |
1da177e4 | 215 | uint8_t alloctype; |
ff116fc8 | 216 | struct extent_position epos; |
1da177e4 LT |
217 | |
218 | struct udf_fileident_bh sfibh, dfibh; | |
219 | loff_t f_pos = udf_ext0_offset(inode) >> 2; | |
220 | int size = (udf_ext0_offset(inode) + inode->i_size) >> 2; | |
221 | struct fileIdentDesc cfi, *sfi, *dfi; | |
222 | ||
223 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) | |
224 | alloctype = ICBTAG_FLAG_AD_SHORT; | |
225 | else | |
226 | alloctype = ICBTAG_FLAG_AD_LONG; | |
227 | ||
cb00ea35 | 228 | if (!inode->i_size) { |
1da177e4 LT |
229 | UDF_I_ALLOCTYPE(inode) = alloctype; |
230 | mark_inode_dirty(inode); | |
231 | return NULL; | |
232 | } | |
233 | ||
234 | /* alloc block, and copy data to it */ | |
235 | *block = udf_new_block(inode->i_sb, inode, | |
cb00ea35 CG |
236 | UDF_I_LOCATION(inode).partitionReferenceNum, |
237 | UDF_I_LOCATION(inode).logicalBlockNum, err); | |
1da177e4 LT |
238 | if (!(*block)) |
239 | return NULL; | |
240 | newblock = udf_get_pblock(inode->i_sb, *block, | |
4b11111a MS |
241 | UDF_I_LOCATION(inode).partitionReferenceNum, |
242 | 0); | |
1da177e4 LT |
243 | if (!newblock) |
244 | return NULL; | |
245 | dbh = udf_tgetblk(inode->i_sb, newblock); | |
246 | if (!dbh) | |
247 | return NULL; | |
248 | lock_buffer(dbh); | |
249 | memset(dbh->b_data, 0x00, inode->i_sb->s_blocksize); | |
250 | set_buffer_uptodate(dbh); | |
251 | unlock_buffer(dbh); | |
252 | mark_buffer_dirty_inode(dbh, inode); | |
253 | ||
4b11111a MS |
254 | sfibh.soffset = sfibh.eoffset = |
255 | (f_pos & ((inode->i_sb->s_blocksize - 1) >> 2)) << 2; | |
ff116fc8 | 256 | sfibh.sbh = sfibh.ebh = NULL; |
1da177e4 LT |
257 | dfibh.soffset = dfibh.eoffset = 0; |
258 | dfibh.sbh = dfibh.ebh = dbh; | |
cb00ea35 | 259 | while ((f_pos < size)) { |
1da177e4 | 260 | UDF_I_ALLOCTYPE(inode) = ICBTAG_FLAG_AD_IN_ICB; |
4b11111a MS |
261 | sfi = udf_fileident_read(inode, &f_pos, &sfibh, &cfi, NULL, |
262 | NULL, NULL, NULL); | |
cb00ea35 | 263 | if (!sfi) { |
3bf25cb4 | 264 | brelse(dbh); |
1da177e4 LT |
265 | return NULL; |
266 | } | |
267 | UDF_I_ALLOCTYPE(inode) = alloctype; | |
268 | sfi->descTag.tagLocation = cpu_to_le32(*block); | |
269 | dfibh.soffset = dfibh.eoffset; | |
270 | dfibh.eoffset += (sfibh.eoffset - sfibh.soffset); | |
271 | dfi = (struct fileIdentDesc *)(dbh->b_data + dfibh.soffset); | |
272 | if (udf_write_fi(inode, sfi, dfi, &dfibh, sfi->impUse, | |
4b11111a MS |
273 | sfi->fileIdent + |
274 | le16_to_cpu(sfi->lengthOfImpUse))) { | |
1da177e4 | 275 | UDF_I_ALLOCTYPE(inode) = ICBTAG_FLAG_AD_IN_ICB; |
3bf25cb4 | 276 | brelse(dbh); |
1da177e4 LT |
277 | return NULL; |
278 | } | |
279 | } | |
280 | mark_buffer_dirty_inode(dbh, inode); | |
281 | ||
4b11111a MS |
282 | memset(UDF_I_DATA(inode) + UDF_I_LENEATTR(inode), 0, |
283 | UDF_I_LENALLOC(inode)); | |
1da177e4 | 284 | UDF_I_LENALLOC(inode) = 0; |
1da177e4 | 285 | eloc.logicalBlockNum = *block; |
4b11111a MS |
286 | eloc.partitionReferenceNum = |
287 | UDF_I_LOCATION(inode).partitionReferenceNum; | |
1da177e4 LT |
288 | elen = inode->i_size; |
289 | UDF_I_LENEXTENTS(inode) = elen; | |
ff116fc8 JK |
290 | epos.bh = NULL; |
291 | epos.block = UDF_I_LOCATION(inode); | |
292 | epos.offset = udf_file_entry_alloc_offset(inode); | |
293 | udf_add_aext(inode, &epos, eloc, elen, 0); | |
1da177e4 LT |
294 | /* UniqueID stuff */ |
295 | ||
3bf25cb4 | 296 | brelse(epos.bh); |
1da177e4 LT |
297 | mark_inode_dirty(inode); |
298 | return dbh; | |
299 | } | |
300 | ||
cb00ea35 CG |
301 | static int udf_get_block(struct inode *inode, sector_t block, |
302 | struct buffer_head *bh_result, int create) | |
1da177e4 LT |
303 | { |
304 | int err, new; | |
305 | struct buffer_head *bh; | |
306 | unsigned long phys; | |
307 | ||
cb00ea35 | 308 | if (!create) { |
1da177e4 LT |
309 | phys = udf_block_map(inode, block); |
310 | if (phys) | |
311 | map_bh(bh_result, inode->i_sb, phys); | |
312 | return 0; | |
313 | } | |
314 | ||
315 | err = -EIO; | |
316 | new = 0; | |
317 | bh = NULL; | |
318 | ||
319 | lock_kernel(); | |
320 | ||
321 | if (block < 0) | |
322 | goto abort_negative; | |
323 | ||
cb00ea35 CG |
324 | if (block == UDF_I_NEXT_ALLOC_BLOCK(inode) + 1) { |
325 | UDF_I_NEXT_ALLOC_BLOCK(inode)++; | |
326 | UDF_I_NEXT_ALLOC_GOAL(inode)++; | |
1da177e4 LT |
327 | } |
328 | ||
329 | err = 0; | |
330 | ||
331 | bh = inode_getblk(inode, block, &err, &phys, &new); | |
2c2111c2 | 332 | BUG_ON(bh); |
1da177e4 LT |
333 | if (err) |
334 | goto abort; | |
2c2111c2 | 335 | BUG_ON(!phys); |
1da177e4 LT |
336 | |
337 | if (new) | |
338 | set_buffer_new(bh_result); | |
339 | map_bh(bh_result, inode->i_sb, phys); | |
28de7948 CG |
340 | |
341 | abort: | |
1da177e4 LT |
342 | unlock_kernel(); |
343 | return err; | |
344 | ||
28de7948 | 345 | abort_negative: |
1da177e4 LT |
346 | udf_warning(inode->i_sb, "udf_get_block", "block < 0"); |
347 | goto abort; | |
348 | } | |
349 | ||
cb00ea35 CG |
350 | static struct buffer_head *udf_getblk(struct inode *inode, long block, |
351 | int create, int *err) | |
1da177e4 | 352 | { |
28de7948 | 353 | struct buffer_head *bh; |
1da177e4 LT |
354 | struct buffer_head dummy; |
355 | ||
356 | dummy.b_state = 0; | |
357 | dummy.b_blocknr = -1000; | |
358 | *err = udf_get_block(inode, block, &dummy, create); | |
cb00ea35 | 359 | if (!*err && buffer_mapped(&dummy)) { |
1da177e4 | 360 | bh = sb_getblk(inode->i_sb, dummy.b_blocknr); |
cb00ea35 | 361 | if (buffer_new(&dummy)) { |
1da177e4 LT |
362 | lock_buffer(bh); |
363 | memset(bh->b_data, 0x00, inode->i_sb->s_blocksize); | |
364 | set_buffer_uptodate(bh); | |
365 | unlock_buffer(bh); | |
366 | mark_buffer_dirty_inode(bh, inode); | |
367 | } | |
368 | return bh; | |
369 | } | |
28de7948 | 370 | |
1da177e4 LT |
371 | return NULL; |
372 | } | |
373 | ||
31170b6a JK |
374 | /* Extend the file by 'blocks' blocks, return the number of extents added */ |
375 | int udf_extend_file(struct inode *inode, struct extent_position *last_pos, | |
4b11111a | 376 | kernel_long_ad *last_ext, sector_t blocks) |
31170b6a JK |
377 | { |
378 | sector_t add; | |
379 | int count = 0, fake = !(last_ext->extLength & UDF_EXTENT_LENGTH_MASK); | |
380 | struct super_block *sb = inode->i_sb; | |
28de7948 | 381 | kernel_lb_addr prealloc_loc = {}; |
31170b6a JK |
382 | int prealloc_len = 0; |
383 | ||
384 | /* The previous extent is fake and we should not extend by anything | |
385 | * - there's nothing to do... */ | |
386 | if (!blocks && fake) | |
387 | return 0; | |
28de7948 | 388 | |
31170b6a JK |
389 | /* Round the last extent up to a multiple of block size */ |
390 | if (last_ext->extLength & (sb->s_blocksize - 1)) { | |
391 | last_ext->extLength = | |
28de7948 CG |
392 | (last_ext->extLength & UDF_EXTENT_FLAG_MASK) | |
393 | (((last_ext->extLength & UDF_EXTENT_LENGTH_MASK) + | |
394 | sb->s_blocksize - 1) & ~(sb->s_blocksize - 1)); | |
31170b6a | 395 | UDF_I_LENEXTENTS(inode) = |
28de7948 CG |
396 | (UDF_I_LENEXTENTS(inode) + sb->s_blocksize - 1) & |
397 | ~(sb->s_blocksize - 1); | |
31170b6a | 398 | } |
28de7948 | 399 | |
31170b6a | 400 | /* Last extent are just preallocated blocks? */ |
4b11111a MS |
401 | if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) == |
402 | EXT_NOT_RECORDED_ALLOCATED) { | |
31170b6a JK |
403 | /* Save the extent so that we can reattach it to the end */ |
404 | prealloc_loc = last_ext->extLocation; | |
405 | prealloc_len = last_ext->extLength; | |
406 | /* Mark the extent as a hole */ | |
407 | last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | | |
28de7948 | 408 | (last_ext->extLength & UDF_EXTENT_LENGTH_MASK); |
31170b6a | 409 | last_ext->extLocation.logicalBlockNum = 0; |
4b11111a | 410 | last_ext->extLocation.partitionReferenceNum = 0; |
31170b6a | 411 | } |
28de7948 | 412 | |
31170b6a | 413 | /* Can we merge with the previous extent? */ |
4b11111a MS |
414 | if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) == |
415 | EXT_NOT_RECORDED_NOT_ALLOCATED) { | |
416 | add = ((1 << 30) - sb->s_blocksize - | |
417 | (last_ext->extLength & UDF_EXTENT_LENGTH_MASK)) >> | |
418 | sb->s_blocksize_bits; | |
31170b6a JK |
419 | if (add > blocks) |
420 | add = blocks; | |
421 | blocks -= add; | |
422 | last_ext->extLength += add << sb->s_blocksize_bits; | |
423 | } | |
424 | ||
425 | if (fake) { | |
426 | udf_add_aext(inode, last_pos, last_ext->extLocation, | |
cb00ea35 | 427 | last_ext->extLength, 1); |
31170b6a | 428 | count++; |
4b11111a MS |
429 | } else |
430 | udf_write_aext(inode, last_pos, last_ext->extLocation, | |
431 | last_ext->extLength, 1); | |
28de7948 | 432 | |
31170b6a JK |
433 | /* Managed to do everything necessary? */ |
434 | if (!blocks) | |
435 | goto out; | |
436 | ||
437 | /* All further extents will be NOT_RECORDED_NOT_ALLOCATED */ | |
438 | last_ext->extLocation.logicalBlockNum = 0; | |
4b11111a | 439 | last_ext->extLocation.partitionReferenceNum = 0; |
28de7948 | 440 | add = (1 << (30-sb->s_blocksize_bits)) - 1; |
4b11111a MS |
441 | last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | |
442 | (add << sb->s_blocksize_bits); | |
28de7948 | 443 | |
31170b6a JK |
444 | /* Create enough extents to cover the whole hole */ |
445 | while (blocks > add) { | |
446 | blocks -= add; | |
447 | if (udf_add_aext(inode, last_pos, last_ext->extLocation, | |
cb00ea35 | 448 | last_ext->extLength, 1) == -1) |
31170b6a JK |
449 | return -1; |
450 | count++; | |
451 | } | |
452 | if (blocks) { | |
453 | last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | | |
28de7948 | 454 | (blocks << sb->s_blocksize_bits); |
31170b6a | 455 | if (udf_add_aext(inode, last_pos, last_ext->extLocation, |
cb00ea35 | 456 | last_ext->extLength, 1) == -1) |
31170b6a JK |
457 | return -1; |
458 | count++; | |
459 | } | |
28de7948 CG |
460 | |
461 | out: | |
31170b6a JK |
462 | /* Do we have some preallocated blocks saved? */ |
463 | if (prealloc_len) { | |
4b11111a MS |
464 | if (udf_add_aext(inode, last_pos, prealloc_loc, |
465 | prealloc_len, 1) == -1) | |
31170b6a JK |
466 | return -1; |
467 | last_ext->extLocation = prealloc_loc; | |
468 | last_ext->extLength = prealloc_len; | |
469 | count++; | |
470 | } | |
28de7948 | 471 | |
31170b6a JK |
472 | /* last_pos should point to the last written extent... */ |
473 | if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_SHORT) | |
474 | last_pos->offset -= sizeof(short_ad); | |
475 | else if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_LONG) | |
476 | last_pos->offset -= sizeof(long_ad); | |
477 | else | |
478 | return -1; | |
28de7948 | 479 | |
31170b6a JK |
480 | return count; |
481 | } | |
482 | ||
cb00ea35 CG |
483 | static struct buffer_head *inode_getblk(struct inode *inode, sector_t block, |
484 | int *err, long *phys, int *new) | |
1da177e4 | 485 | { |
31170b6a | 486 | static sector_t last_block; |
ff116fc8 | 487 | struct buffer_head *result = NULL; |
1da177e4 | 488 | kernel_long_ad laarr[EXTENT_MERGE_SIZE]; |
ff116fc8 | 489 | struct extent_position prev_epos, cur_epos, next_epos; |
1da177e4 | 490 | int count = 0, startnum = 0, endnum = 0; |
85d71244 JK |
491 | uint32_t elen = 0, tmpelen; |
492 | kernel_lb_addr eloc, tmpeloc; | |
1da177e4 | 493 | int c = 1; |
60448b1d JK |
494 | loff_t lbcount = 0, b_off = 0; |
495 | uint32_t newblocknum, newblock; | |
496 | sector_t offset = 0; | |
1da177e4 LT |
497 | int8_t etype; |
498 | int goal = 0, pgoal = UDF_I_LOCATION(inode).logicalBlockNum; | |
31170b6a | 499 | int lastblock = 0; |
1da177e4 | 500 | |
ff116fc8 JK |
501 | prev_epos.offset = udf_file_entry_alloc_offset(inode); |
502 | prev_epos.block = UDF_I_LOCATION(inode); | |
503 | prev_epos.bh = NULL; | |
504 | cur_epos = next_epos = prev_epos; | |
28de7948 | 505 | b_off = (loff_t)block << inode->i_sb->s_blocksize_bits; |
1da177e4 LT |
506 | |
507 | /* find the extent which contains the block we are looking for. | |
cb00ea35 CG |
508 | alternate between laarr[0] and laarr[1] for locations of the |
509 | current extent, and the previous extent */ | |
510 | do { | |
511 | if (prev_epos.bh != cur_epos.bh) { | |
3bf25cb4 JK |
512 | brelse(prev_epos.bh); |
513 | get_bh(cur_epos.bh); | |
ff116fc8 | 514 | prev_epos.bh = cur_epos.bh; |
1da177e4 | 515 | } |
cb00ea35 | 516 | if (cur_epos.bh != next_epos.bh) { |
3bf25cb4 JK |
517 | brelse(cur_epos.bh); |
518 | get_bh(next_epos.bh); | |
ff116fc8 | 519 | cur_epos.bh = next_epos.bh; |
1da177e4 LT |
520 | } |
521 | ||
522 | lbcount += elen; | |
523 | ||
ff116fc8 JK |
524 | prev_epos.block = cur_epos.block; |
525 | cur_epos.block = next_epos.block; | |
1da177e4 | 526 | |
ff116fc8 JK |
527 | prev_epos.offset = cur_epos.offset; |
528 | cur_epos.offset = next_epos.offset; | |
1da177e4 | 529 | |
4b11111a MS |
530 | etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 1); |
531 | if (etype == -1) | |
1da177e4 LT |
532 | break; |
533 | ||
534 | c = !c; | |
535 | ||
536 | laarr[c].extLength = (etype << 30) | elen; | |
537 | laarr[c].extLocation = eloc; | |
538 | ||
539 | if (etype != (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) | |
540 | pgoal = eloc.logicalBlockNum + | |
28de7948 CG |
541 | ((elen + inode->i_sb->s_blocksize - 1) >> |
542 | inode->i_sb->s_blocksize_bits); | |
1da177e4 | 543 | |
cb00ea35 | 544 | count++; |
1da177e4 LT |
545 | } while (lbcount + elen <= b_off); |
546 | ||
547 | b_off -= lbcount; | |
548 | offset = b_off >> inode->i_sb->s_blocksize_bits; | |
85d71244 JK |
549 | /* |
550 | * Move prev_epos and cur_epos into indirect extent if we are at | |
551 | * the pointer to it | |
552 | */ | |
553 | udf_next_aext(inode, &prev_epos, &tmpeloc, &tmpelen, 0); | |
554 | udf_next_aext(inode, &cur_epos, &tmpeloc, &tmpelen, 0); | |
1da177e4 LT |
555 | |
556 | /* if the extent is allocated and recorded, return the block | |
cb00ea35 | 557 | if the extent is not a multiple of the blocksize, round up */ |
1da177e4 | 558 | |
cb00ea35 CG |
559 | if (etype == (EXT_RECORDED_ALLOCATED >> 30)) { |
560 | if (elen & (inode->i_sb->s_blocksize - 1)) { | |
1da177e4 | 561 | elen = EXT_RECORDED_ALLOCATED | |
28de7948 CG |
562 | ((elen + inode->i_sb->s_blocksize - 1) & |
563 | ~(inode->i_sb->s_blocksize - 1)); | |
ff116fc8 | 564 | etype = udf_write_aext(inode, &cur_epos, eloc, elen, 1); |
1da177e4 | 565 | } |
3bf25cb4 JK |
566 | brelse(prev_epos.bh); |
567 | brelse(cur_epos.bh); | |
568 | brelse(next_epos.bh); | |
1da177e4 LT |
569 | newblock = udf_get_lb_pblock(inode->i_sb, eloc, offset); |
570 | *phys = newblock; | |
571 | return NULL; | |
572 | } | |
573 | ||
31170b6a JK |
574 | last_block = block; |
575 | /* Are we beyond EOF? */ | |
cb00ea35 | 576 | if (etype == -1) { |
31170b6a JK |
577 | int ret; |
578 | ||
579 | if (count) { | |
580 | if (c) | |
581 | laarr[0] = laarr[1]; | |
582 | startnum = 1; | |
cb00ea35 | 583 | } else { |
31170b6a | 584 | /* Create a fake extent when there's not one */ |
4b11111a MS |
585 | memset(&laarr[0].extLocation, 0x00, |
586 | sizeof(kernel_lb_addr)); | |
31170b6a | 587 | laarr[0].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED; |
4b11111a MS |
588 | /* Will udf_extend_file() create real extent from |
589 | a fake one? */ | |
31170b6a JK |
590 | startnum = (offset > 0); |
591 | } | |
592 | /* Create extents for the hole between EOF and offset */ | |
593 | ret = udf_extend_file(inode, &prev_epos, laarr, offset); | |
594 | if (ret == -1) { | |
595 | brelse(prev_epos.bh); | |
596 | brelse(cur_epos.bh); | |
597 | brelse(next_epos.bh); | |
598 | /* We don't really know the error here so we just make | |
599 | * something up */ | |
600 | *err = -ENOSPC; | |
601 | return NULL; | |
602 | } | |
603 | c = 0; | |
604 | offset = 0; | |
605 | count += ret; | |
606 | /* We are not covered by a preallocated extent? */ | |
4b11111a MS |
607 | if ((laarr[0].extLength & UDF_EXTENT_FLAG_MASK) != |
608 | EXT_NOT_RECORDED_ALLOCATED) { | |
31170b6a JK |
609 | /* Is there any real extent? - otherwise we overwrite |
610 | * the fake one... */ | |
611 | if (count) | |
612 | c = !c; | |
613 | laarr[c].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | | |
28de7948 | 614 | inode->i_sb->s_blocksize; |
4b11111a MS |
615 | memset(&laarr[c].extLocation, 0x00, |
616 | sizeof(kernel_lb_addr)); | |
cb00ea35 CG |
617 | count++; |
618 | endnum++; | |
31170b6a | 619 | } |
cb00ea35 | 620 | endnum = c + 1; |
1da177e4 | 621 | lastblock = 1; |
cb00ea35 | 622 | } else { |
1da177e4 LT |
623 | endnum = startnum = ((count > 2) ? 2 : count); |
624 | ||
4b11111a MS |
625 | /* if the current extent is in position 0, |
626 | swap it with the previous */ | |
cb00ea35 | 627 | if (!c && count != 1) { |
31170b6a JK |
628 | laarr[2] = laarr[0]; |
629 | laarr[0] = laarr[1]; | |
630 | laarr[1] = laarr[2]; | |
631 | c = 1; | |
632 | } | |
1da177e4 | 633 | |
4b11111a MS |
634 | /* if the current block is located in an extent, |
635 | read the next extent */ | |
636 | etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 0); | |
637 | if (etype != -1) { | |
cb00ea35 CG |
638 | laarr[c + 1].extLength = (etype << 30) | elen; |
639 | laarr[c + 1].extLocation = eloc; | |
640 | count++; | |
641 | startnum++; | |
642 | endnum++; | |
4b11111a | 643 | } else |
1da177e4 LT |
644 | lastblock = 1; |
645 | } | |
1da177e4 LT |
646 | |
647 | /* if the current extent is not recorded but allocated, get the | |
28de7948 | 648 | * block in the extent corresponding to the requested block */ |
4b11111a | 649 | if ((laarr[c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30)) |
1da177e4 | 650 | newblocknum = laarr[c].extLocation.logicalBlockNum + offset; |
4b11111a | 651 | else { /* otherwise, allocate a new block */ |
1da177e4 LT |
652 | if (UDF_I_NEXT_ALLOC_BLOCK(inode) == block) |
653 | goal = UDF_I_NEXT_ALLOC_GOAL(inode); | |
654 | ||
cb00ea35 | 655 | if (!goal) { |
4b11111a MS |
656 | if (!(goal = pgoal)) /* XXX: what was intended here? */ |
657 | goal = UDF_I_LOCATION(inode).logicalBlockNum+1; | |
1da177e4 LT |
658 | } |
659 | ||
4b11111a MS |
660 | newblocknum = udf_new_block(inode->i_sb, inode, |
661 | UDF_I_LOCATION(inode).partitionReferenceNum, | |
662 | goal, err); | |
663 | if (!newblocknum) { | |
3bf25cb4 | 664 | brelse(prev_epos.bh); |
1da177e4 LT |
665 | *err = -ENOSPC; |
666 | return NULL; | |
667 | } | |
668 | UDF_I_LENEXTENTS(inode) += inode->i_sb->s_blocksize; | |
669 | } | |
670 | ||
4b11111a MS |
671 | /* if the extent the requsted block is located in contains multiple |
672 | * blocks, split the extent into at most three extents. blocks prior | |
673 | * to requested block, requested block, and blocks after requested | |
674 | * block */ | |
1da177e4 LT |
675 | udf_split_extents(inode, &c, offset, newblocknum, laarr, &endnum); |
676 | ||
677 | #ifdef UDF_PREALLOCATE | |
678 | /* preallocate blocks */ | |
679 | udf_prealloc_extents(inode, c, lastblock, laarr, &endnum); | |
680 | #endif | |
681 | ||
682 | /* merge any continuous blocks in laarr */ | |
683 | udf_merge_extents(inode, laarr, &endnum); | |
684 | ||
685 | /* write back the new extents, inserting new extents if the new number | |
28de7948 CG |
686 | * of extents is greater than the old number, and deleting extents if |
687 | * the new number of extents is less than the old number */ | |
ff116fc8 | 688 | udf_update_extents(inode, laarr, startnum, endnum, &prev_epos); |
1da177e4 | 689 | |
3bf25cb4 | 690 | brelse(prev_epos.bh); |
1da177e4 | 691 | |
4b11111a MS |
692 | newblock = udf_get_pblock(inode->i_sb, newblocknum, |
693 | UDF_I_LOCATION(inode).partitionReferenceNum, 0); | |
694 | if (!newblock) | |
1da177e4 | 695 | return NULL; |
1da177e4 LT |
696 | *phys = newblock; |
697 | *err = 0; | |
698 | *new = 1; | |
699 | UDF_I_NEXT_ALLOC_BLOCK(inode) = block; | |
700 | UDF_I_NEXT_ALLOC_GOAL(inode) = newblocknum; | |
701 | inode->i_ctime = current_fs_time(inode->i_sb); | |
702 | ||
703 | if (IS_SYNC(inode)) | |
704 | udf_sync_inode(inode); | |
705 | else | |
706 | mark_inode_dirty(inode); | |
28de7948 | 707 | |
1da177e4 LT |
708 | return result; |
709 | } | |
710 | ||
cb00ea35 CG |
711 | static void udf_split_extents(struct inode *inode, int *c, int offset, |
712 | int newblocknum, | |
713 | kernel_long_ad laarr[EXTENT_MERGE_SIZE], | |
714 | int *endnum) | |
1da177e4 | 715 | { |
4b11111a MS |
716 | unsigned long blocksize = inode->i_sb->s_blocksize; |
717 | unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; | |
718 | ||
1da177e4 | 719 | if ((laarr[*c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30) || |
4b11111a MS |
720 | (laarr[*c].extLength >> 30) == |
721 | (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) { | |
1da177e4 LT |
722 | int curr = *c; |
723 | int blen = ((laarr[curr].extLength & UDF_EXTENT_LENGTH_MASK) + | |
4b11111a | 724 | blocksize - 1) >> blocksize_bits; |
1da177e4 LT |
725 | int8_t etype = (laarr[curr].extLength >> 30); |
726 | ||
4b11111a | 727 | if (blen == 1) |
28de7948 | 728 | ; |
4b11111a | 729 | else if (!offset || blen == offset + 1) { |
cb00ea35 CG |
730 | laarr[curr + 2] = laarr[curr + 1]; |
731 | laarr[curr + 1] = laarr[curr]; | |
732 | } else { | |
733 | laarr[curr + 3] = laarr[curr + 1]; | |
734 | laarr[curr + 2] = laarr[curr + 1] = laarr[curr]; | |
735 | } | |
736 | ||
737 | if (offset) { | |
738 | if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30)) { | |
4b11111a MS |
739 | udf_free_blocks(inode->i_sb, inode, |
740 | laarr[curr].extLocation, | |
741 | 0, offset); | |
742 | laarr[curr].extLength = | |
743 | EXT_NOT_RECORDED_NOT_ALLOCATED | | |
744 | (offset << blocksize_bits); | |
1da177e4 | 745 | laarr[curr].extLocation.logicalBlockNum = 0; |
4b11111a MS |
746 | laarr[curr].extLocation. |
747 | partitionReferenceNum = 0; | |
748 | } else | |
1da177e4 | 749 | laarr[curr].extLength = (etype << 30) | |
4b11111a | 750 | (offset << blocksize_bits); |
cb00ea35 CG |
751 | curr++; |
752 | (*c)++; | |
753 | (*endnum)++; | |
1da177e4 | 754 | } |
647bd61a | 755 | |
1da177e4 LT |
756 | laarr[curr].extLocation.logicalBlockNum = newblocknum; |
757 | if (etype == (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) | |
758 | laarr[curr].extLocation.partitionReferenceNum = | |
28de7948 | 759 | UDF_I_LOCATION(inode).partitionReferenceNum; |
1da177e4 | 760 | laarr[curr].extLength = EXT_RECORDED_ALLOCATED | |
4b11111a | 761 | blocksize; |
cb00ea35 | 762 | curr++; |
1da177e4 | 763 | |
cb00ea35 | 764 | if (blen != offset + 1) { |
1da177e4 | 765 | if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30)) |
4b11111a MS |
766 | laarr[curr].extLocation.logicalBlockNum += |
767 | offset + 1; | |
28de7948 | 768 | laarr[curr].extLength = (etype << 30) | |
4b11111a | 769 | ((blen - (offset + 1)) << blocksize_bits); |
cb00ea35 CG |
770 | curr++; |
771 | (*endnum)++; | |
1da177e4 LT |
772 | } |
773 | } | |
774 | } | |
775 | ||
776 | static void udf_prealloc_extents(struct inode *inode, int c, int lastblock, | |
cb00ea35 CG |
777 | kernel_long_ad laarr[EXTENT_MERGE_SIZE], |
778 | int *endnum) | |
1da177e4 LT |
779 | { |
780 | int start, length = 0, currlength = 0, i; | |
781 | ||
cb00ea35 | 782 | if (*endnum >= (c + 1)) { |
1da177e4 LT |
783 | if (!lastblock) |
784 | return; | |
785 | else | |
786 | start = c; | |
cb00ea35 | 787 | } else { |
4b11111a MS |
788 | if ((laarr[c + 1].extLength >> 30) == |
789 | (EXT_NOT_RECORDED_ALLOCATED >> 30)) { | |
cb00ea35 | 790 | start = c + 1; |
4b11111a MS |
791 | length = currlength = |
792 | (((laarr[c + 1].extLength & | |
793 | UDF_EXTENT_LENGTH_MASK) + | |
794 | inode->i_sb->s_blocksize - 1) >> | |
795 | inode->i_sb->s_blocksize_bits); | |
796 | } else | |
1da177e4 LT |
797 | start = c; |
798 | } | |
799 | ||
cb00ea35 CG |
800 | for (i = start + 1; i <= *endnum; i++) { |
801 | if (i == *endnum) { | |
1da177e4 LT |
802 | if (lastblock) |
803 | length += UDF_DEFAULT_PREALLOC_BLOCKS; | |
4b11111a MS |
804 | } else if ((laarr[i].extLength >> 30) == |
805 | (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) { | |
806 | length += (((laarr[i].extLength & | |
807 | UDF_EXTENT_LENGTH_MASK) + | |
808 | inode->i_sb->s_blocksize - 1) >> | |
809 | inode->i_sb->s_blocksize_bits); | |
810 | } else | |
1da177e4 LT |
811 | break; |
812 | } | |
813 | ||
cb00ea35 | 814 | if (length) { |
1da177e4 | 815 | int next = laarr[start].extLocation.logicalBlockNum + |
28de7948 | 816 | (((laarr[start].extLength & UDF_EXTENT_LENGTH_MASK) + |
4b11111a MS |
817 | inode->i_sb->s_blocksize - 1) >> |
818 | inode->i_sb->s_blocksize_bits); | |
1da177e4 | 819 | int numalloc = udf_prealloc_blocks(inode->i_sb, inode, |
4b11111a MS |
820 | laarr[start].extLocation.partitionReferenceNum, |
821 | next, (UDF_DEFAULT_PREALLOC_BLOCKS > length ? | |
822 | length : UDF_DEFAULT_PREALLOC_BLOCKS) - | |
823 | currlength); | |
28de7948 | 824 | if (numalloc) { |
4b11111a | 825 | if (start == (c + 1)) |
1da177e4 | 826 | laarr[start].extLength += |
4b11111a MS |
827 | (numalloc << |
828 | inode->i_sb->s_blocksize_bits); | |
829 | else { | |
cb00ea35 CG |
830 | memmove(&laarr[c + 2], &laarr[c + 1], |
831 | sizeof(long_ad) * (*endnum - (c + 1))); | |
832 | (*endnum)++; | |
833 | laarr[c + 1].extLocation.logicalBlockNum = next; | |
834 | laarr[c + 1].extLocation.partitionReferenceNum = | |
4b11111a MS |
835 | laarr[c].extLocation. |
836 | partitionReferenceNum; | |
837 | laarr[c + 1].extLength = | |
838 | EXT_NOT_RECORDED_ALLOCATED | | |
839 | (numalloc << | |
840 | inode->i_sb->s_blocksize_bits); | |
cb00ea35 | 841 | start = c + 1; |
1da177e4 LT |
842 | } |
843 | ||
cb00ea35 | 844 | for (i = start + 1; numalloc && i < *endnum; i++) { |
4b11111a MS |
845 | int elen = ((laarr[i].extLength & |
846 | UDF_EXTENT_LENGTH_MASK) + | |
847 | inode->i_sb->s_blocksize - 1) >> | |
848 | inode->i_sb->s_blocksize_bits; | |
1da177e4 | 849 | |
cb00ea35 | 850 | if (elen > numalloc) { |
1da177e4 | 851 | laarr[i].extLength -= |
4b11111a MS |
852 | (numalloc << |
853 | inode->i_sb->s_blocksize_bits); | |
1da177e4 | 854 | numalloc = 0; |
cb00ea35 | 855 | } else { |
1da177e4 | 856 | numalloc -= elen; |
cb00ea35 | 857 | if (*endnum > (i + 1)) |
4b11111a MS |
858 | memmove(&laarr[i], |
859 | &laarr[i + 1], | |
860 | sizeof(long_ad) * | |
861 | (*endnum - (i + 1))); | |
cb00ea35 CG |
862 | i--; |
863 | (*endnum)--; | |
1da177e4 LT |
864 | } |
865 | } | |
4b11111a MS |
866 | UDF_I_LENEXTENTS(inode) += |
867 | numalloc << inode->i_sb->s_blocksize_bits; | |
1da177e4 LT |
868 | } |
869 | } | |
870 | } | |
871 | ||
872 | static void udf_merge_extents(struct inode *inode, | |
cb00ea35 CG |
873 | kernel_long_ad laarr[EXTENT_MERGE_SIZE], |
874 | int *endnum) | |
1da177e4 LT |
875 | { |
876 | int i; | |
4b11111a MS |
877 | unsigned long blocksize = inode->i_sb->s_blocksize; |
878 | unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; | |
1da177e4 | 879 | |
cb00ea35 | 880 | for (i = 0; i < (*endnum - 1); i++) { |
4b11111a MS |
881 | kernel_long_ad *li /*l[i]*/ = &laarr[i]; |
882 | kernel_long_ad *lip1 /*l[i plus 1]*/ = &laarr[i + 1]; | |
883 | ||
884 | if (((li->extLength >> 30) == (lip1->extLength >> 30)) && | |
885 | (((li->extLength >> 30) == | |
886 | (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) || | |
887 | ((lip1->extLocation.logicalBlockNum - | |
888 | li->extLocation.logicalBlockNum) == | |
889 | (((li->extLength & UDF_EXTENT_LENGTH_MASK) + | |
890 | blocksize - 1) >> blocksize_bits)))) { | |
891 | ||
892 | if (((li->extLength & UDF_EXTENT_LENGTH_MASK) + | |
893 | (lip1->extLength & UDF_EXTENT_LENGTH_MASK) + | |
894 | blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) { | |
895 | lip1->extLength = (lip1->extLength - | |
896 | (li->extLength & | |
897 | UDF_EXTENT_LENGTH_MASK) + | |
898 | UDF_EXTENT_LENGTH_MASK) & | |
899 | ~(blocksize - 1); | |
900 | li->extLength = (li->extLength & | |
901 | UDF_EXTENT_FLAG_MASK) + | |
902 | (UDF_EXTENT_LENGTH_MASK + 1) - | |
903 | blocksize; | |
904 | lip1->extLocation.logicalBlockNum = | |
905 | li->extLocation.logicalBlockNum + | |
906 | ((li->extLength & | |
907 | UDF_EXTENT_LENGTH_MASK) >> | |
908 | blocksize_bits); | |
909 | } else { | |
910 | li->extLength = lip1->extLength + | |
911 | (((li->extLength & | |
912 | UDF_EXTENT_LENGTH_MASK) + | |
913 | blocksize - 1) & ~(blocksize - 1)); | |
914 | if (*endnum > (i + 2)) | |
915 | memmove(&laarr[i + 1], &laarr[i + 2], | |
916 | sizeof(long_ad) * | |
917 | (*endnum - (i + 2))); | |
918 | i--; | |
919 | (*endnum)--; | |
1da177e4 | 920 | } |
4b11111a MS |
921 | } else if (((li->extLength >> 30) == |
922 | (EXT_NOT_RECORDED_ALLOCATED >> 30)) && | |
923 | ((lip1->extLength >> 30) == | |
924 | (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))) { | |
925 | udf_free_blocks(inode->i_sb, inode, li->extLocation, 0, | |
926 | ((li->extLength & | |
927 | UDF_EXTENT_LENGTH_MASK) + | |
928 | blocksize - 1) >> blocksize_bits); | |
929 | li->extLocation.logicalBlockNum = 0; | |
930 | li->extLocation.partitionReferenceNum = 0; | |
931 | ||
932 | if (((li->extLength & UDF_EXTENT_LENGTH_MASK) + | |
933 | (lip1->extLength & UDF_EXTENT_LENGTH_MASK) + | |
934 | blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) { | |
935 | lip1->extLength = (lip1->extLength - | |
936 | (li->extLength & | |
937 | UDF_EXTENT_LENGTH_MASK) + | |
938 | UDF_EXTENT_LENGTH_MASK) & | |
939 | ~(blocksize - 1); | |
940 | li->extLength = (li->extLength & | |
941 | UDF_EXTENT_FLAG_MASK) + | |
942 | (UDF_EXTENT_LENGTH_MASK + 1) - | |
943 | blocksize; | |
cb00ea35 | 944 | } else { |
4b11111a MS |
945 | li->extLength = lip1->extLength + |
946 | (((li->extLength & | |
947 | UDF_EXTENT_LENGTH_MASK) + | |
948 | blocksize - 1) & ~(blocksize - 1)); | |
cb00ea35 CG |
949 | if (*endnum > (i + 2)) |
950 | memmove(&laarr[i + 1], &laarr[i + 2], | |
4b11111a MS |
951 | sizeof(long_ad) * |
952 | (*endnum - (i + 2))); | |
cb00ea35 CG |
953 | i--; |
954 | (*endnum)--; | |
1da177e4 | 955 | } |
4b11111a MS |
956 | } else if ((li->extLength >> 30) == |
957 | (EXT_NOT_RECORDED_ALLOCATED >> 30)) { | |
958 | udf_free_blocks(inode->i_sb, inode, | |
959 | li->extLocation, 0, | |
960 | ((li->extLength & | |
961 | UDF_EXTENT_LENGTH_MASK) + | |
962 | blocksize - 1) >> blocksize_bits); | |
963 | li->extLocation.logicalBlockNum = 0; | |
964 | li->extLocation.partitionReferenceNum = 0; | |
965 | li->extLength = (li->extLength & | |
966 | UDF_EXTENT_LENGTH_MASK) | | |
967 | EXT_NOT_RECORDED_NOT_ALLOCATED; | |
1da177e4 LT |
968 | } |
969 | } | |
970 | } | |
971 | ||
972 | static void udf_update_extents(struct inode *inode, | |
cb00ea35 CG |
973 | kernel_long_ad laarr[EXTENT_MERGE_SIZE], |
974 | int startnum, int endnum, | |
975 | struct extent_position *epos) | |
1da177e4 LT |
976 | { |
977 | int start = 0, i; | |
978 | kernel_lb_addr tmploc; | |
979 | uint32_t tmplen; | |
980 | ||
cb00ea35 CG |
981 | if (startnum > endnum) { |
982 | for (i = 0; i < (startnum - endnum); i++) | |
ff116fc8 | 983 | udf_delete_aext(inode, *epos, laarr[i].extLocation, |
cb00ea35 CG |
984 | laarr[i].extLength); |
985 | } else if (startnum < endnum) { | |
986 | for (i = 0; i < (endnum - startnum); i++) { | |
ff116fc8 | 987 | udf_insert_aext(inode, *epos, laarr[i].extLocation, |
cb00ea35 | 988 | laarr[i].extLength); |
ff116fc8 | 989 | udf_next_aext(inode, epos, &laarr[i].extLocation, |
cb00ea35 CG |
990 | &laarr[i].extLength, 1); |
991 | start++; | |
1da177e4 LT |
992 | } |
993 | } | |
994 | ||
cb00ea35 | 995 | for (i = start; i < endnum; i++) { |
ff116fc8 JK |
996 | udf_next_aext(inode, epos, &tmploc, &tmplen, 0); |
997 | udf_write_aext(inode, epos, laarr[i].extLocation, | |
cb00ea35 | 998 | laarr[i].extLength, 1); |
1da177e4 LT |
999 | } |
1000 | } | |
1001 | ||
cb00ea35 CG |
1002 | struct buffer_head *udf_bread(struct inode *inode, int block, |
1003 | int create, int *err) | |
1da177e4 | 1004 | { |
cb00ea35 | 1005 | struct buffer_head *bh = NULL; |
1da177e4 LT |
1006 | |
1007 | bh = udf_getblk(inode, block, create, err); | |
1008 | if (!bh) | |
1009 | return NULL; | |
1010 | ||
1011 | if (buffer_uptodate(bh)) | |
1012 | return bh; | |
28de7948 | 1013 | |
1da177e4 | 1014 | ll_rw_block(READ, 1, &bh); |
28de7948 | 1015 | |
1da177e4 LT |
1016 | wait_on_buffer(bh); |
1017 | if (buffer_uptodate(bh)) | |
1018 | return bh; | |
28de7948 | 1019 | |
1da177e4 LT |
1020 | brelse(bh); |
1021 | *err = -EIO; | |
1022 | return NULL; | |
1023 | } | |
1024 | ||
cb00ea35 | 1025 | void udf_truncate(struct inode *inode) |
1da177e4 LT |
1026 | { |
1027 | int offset; | |
1028 | int err; | |
1029 | ||
1030 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || | |
cb00ea35 | 1031 | S_ISLNK(inode->i_mode))) |
1da177e4 LT |
1032 | return; |
1033 | if (IS_APPEND(inode) || IS_IMMUTABLE(inode)) | |
1034 | return; | |
1035 | ||
1036 | lock_kernel(); | |
cb00ea35 | 1037 | if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_IN_ICB) { |
4b11111a MS |
1038 | if (inode->i_sb->s_blocksize < |
1039 | (udf_file_entry_alloc_offset(inode) + | |
1040 | inode->i_size)) { | |
1da177e4 | 1041 | udf_expand_file_adinicb(inode, inode->i_size, &err); |
cb00ea35 | 1042 | if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_IN_ICB) { |
1da177e4 LT |
1043 | inode->i_size = UDF_I_LENALLOC(inode); |
1044 | unlock_kernel(); | |
1045 | return; | |
4b11111a | 1046 | } else |
1da177e4 | 1047 | udf_truncate_extents(inode); |
cb00ea35 | 1048 | } else { |
1da177e4 | 1049 | offset = inode->i_size & (inode->i_sb->s_blocksize - 1); |
4b11111a MS |
1050 | memset(UDF_I_DATA(inode) + UDF_I_LENEATTR(inode) + |
1051 | offset, 0x00, inode->i_sb->s_blocksize - | |
1052 | offset - udf_file_entry_alloc_offset(inode)); | |
1da177e4 LT |
1053 | UDF_I_LENALLOC(inode) = inode->i_size; |
1054 | } | |
cb00ea35 | 1055 | } else { |
4b11111a MS |
1056 | block_truncate_page(inode->i_mapping, inode->i_size, |
1057 | udf_get_block); | |
1da177e4 | 1058 | udf_truncate_extents(inode); |
647bd61a | 1059 | } |
1da177e4 LT |
1060 | |
1061 | inode->i_mtime = inode->i_ctime = current_fs_time(inode->i_sb); | |
1062 | if (IS_SYNC(inode)) | |
cb00ea35 | 1063 | udf_sync_inode(inode); |
1da177e4 LT |
1064 | else |
1065 | mark_inode_dirty(inode); | |
1066 | unlock_kernel(); | |
1067 | } | |
1068 | ||
cb00ea35 | 1069 | static void __udf_read_inode(struct inode *inode) |
1da177e4 LT |
1070 | { |
1071 | struct buffer_head *bh = NULL; | |
1072 | struct fileEntry *fe; | |
1073 | uint16_t ident; | |
1074 | ||
1075 | /* | |
1076 | * Set defaults, but the inode is still incomplete! | |
1077 | * Note: get_new_inode() sets the following on a new inode: | |
1078 | * i_sb = sb | |
1079 | * i_no = ino | |
1080 | * i_flags = sb->s_flags | |
1081 | * i_state = 0 | |
1082 | * clean_inode(): zero fills and sets | |
1083 | * i_count = 1 | |
1084 | * i_nlink = 1 | |
1085 | * i_op = NULL; | |
1086 | */ | |
1da177e4 | 1087 | bh = udf_read_ptagged(inode->i_sb, UDF_I_LOCATION(inode), 0, &ident); |
cb00ea35 | 1088 | if (!bh) { |
1da177e4 | 1089 | printk(KERN_ERR "udf: udf_read_inode(ino %ld) failed !bh\n", |
cb00ea35 | 1090 | inode->i_ino); |
1da177e4 LT |
1091 | make_bad_inode(inode); |
1092 | return; | |
1093 | } | |
1094 | ||
1095 | if (ident != TAG_IDENT_FE && ident != TAG_IDENT_EFE && | |
cb00ea35 | 1096 | ident != TAG_IDENT_USE) { |
4b11111a MS |
1097 | printk(KERN_ERR "udf: udf_read_inode(ino %ld) " |
1098 | "failed ident=%d\n", inode->i_ino, ident); | |
3bf25cb4 | 1099 | brelse(bh); |
1da177e4 LT |
1100 | make_bad_inode(inode); |
1101 | return; | |
1102 | } | |
1103 | ||
1104 | fe = (struct fileEntry *)bh->b_data; | |
1105 | ||
5e0f0017 | 1106 | if (fe->icbTag.strategyType == cpu_to_le16(4096)) { |
1da177e4 LT |
1107 | struct buffer_head *ibh = NULL, *nbh = NULL; |
1108 | struct indirectEntry *ie; | |
1109 | ||
4b11111a MS |
1110 | ibh = udf_read_ptagged(inode->i_sb, UDF_I_LOCATION(inode), 1, |
1111 | &ident); | |
cb00ea35 CG |
1112 | if (ident == TAG_IDENT_IE) { |
1113 | if (ibh) { | |
1da177e4 LT |
1114 | kernel_lb_addr loc; |
1115 | ie = (struct indirectEntry *)ibh->b_data; | |
647bd61a | 1116 | |
1da177e4 | 1117 | loc = lelb_to_cpu(ie->indirectICB.extLocation); |
647bd61a CG |
1118 | |
1119 | if (ie->indirectICB.extLength && | |
4b11111a MS |
1120 | (nbh = udf_read_ptagged(inode->i_sb, loc, 0, |
1121 | &ident))) { | |
28de7948 CG |
1122 | if (ident == TAG_IDENT_FE || |
1123 | ident == TAG_IDENT_EFE) { | |
4b11111a MS |
1124 | memcpy(&UDF_I_LOCATION(inode), |
1125 | &loc, | |
cb00ea35 | 1126 | sizeof(kernel_lb_addr)); |
3bf25cb4 JK |
1127 | brelse(bh); |
1128 | brelse(ibh); | |
1129 | brelse(nbh); | |
1da177e4 LT |
1130 | __udf_read_inode(inode); |
1131 | return; | |
cb00ea35 | 1132 | } else { |
3bf25cb4 JK |
1133 | brelse(nbh); |
1134 | brelse(ibh); | |
1da177e4 | 1135 | } |
28de7948 | 1136 | } else { |
3bf25cb4 | 1137 | brelse(ibh); |
28de7948 | 1138 | } |
1da177e4 | 1139 | } |
28de7948 | 1140 | } else { |
3bf25cb4 | 1141 | brelse(ibh); |
28de7948 | 1142 | } |
5e0f0017 | 1143 | } else if (fe->icbTag.strategyType != cpu_to_le16(4)) { |
1da177e4 | 1144 | printk(KERN_ERR "udf: unsupported strategy type: %d\n", |
cb00ea35 | 1145 | le16_to_cpu(fe->icbTag.strategyType)); |
3bf25cb4 | 1146 | brelse(bh); |
1da177e4 LT |
1147 | make_bad_inode(inode); |
1148 | return; | |
1149 | } | |
1150 | udf_fill_inode(inode, bh); | |
31170b6a | 1151 | |
3bf25cb4 | 1152 | brelse(bh); |
1da177e4 LT |
1153 | } |
1154 | ||
1155 | static void udf_fill_inode(struct inode *inode, struct buffer_head *bh) | |
1156 | { | |
1157 | struct fileEntry *fe; | |
1158 | struct extendedFileEntry *efe; | |
1159 | time_t convtime; | |
1160 | long convtime_usec; | |
1161 | int offset; | |
6c79e987 | 1162 | struct udf_sb_info *sbi = UDF_SB(inode->i_sb); |
1da177e4 LT |
1163 | |
1164 | fe = (struct fileEntry *)bh->b_data; | |
1165 | efe = (struct extendedFileEntry *)bh->b_data; | |
1166 | ||
5e0f0017 | 1167 | if (fe->icbTag.strategyType == cpu_to_le16(4)) |
1da177e4 | 1168 | UDF_I_STRAT4096(inode) = 0; |
5e0f0017 | 1169 | else /* if (fe->icbTag.strategyType == cpu_to_le16(4096)) */ |
1da177e4 LT |
1170 | UDF_I_STRAT4096(inode) = 1; |
1171 | ||
4b11111a MS |
1172 | UDF_I_ALLOCTYPE(inode) = le16_to_cpu(fe->icbTag.flags) & |
1173 | ICBTAG_FLAG_AD_MASK; | |
1da177e4 LT |
1174 | UDF_I_UNIQUE(inode) = 0; |
1175 | UDF_I_LENEATTR(inode) = 0; | |
1176 | UDF_I_LENEXTENTS(inode) = 0; | |
1177 | UDF_I_LENALLOC(inode) = 0; | |
1178 | UDF_I_NEXT_ALLOC_BLOCK(inode) = 0; | |
1179 | UDF_I_NEXT_ALLOC_GOAL(inode) = 0; | |
5e0f0017 | 1180 | if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_EFE)) { |
1da177e4 LT |
1181 | UDF_I_EFE(inode) = 1; |
1182 | UDF_I_USE(inode) = 0; | |
4b11111a MS |
1183 | if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize - |
1184 | sizeof(struct extendedFileEntry))) { | |
647bd61a CG |
1185 | make_bad_inode(inode); |
1186 | return; | |
1187 | } | |
4b11111a MS |
1188 | memcpy(UDF_I_DATA(inode), |
1189 | bh->b_data + sizeof(struct extendedFileEntry), | |
1190 | inode->i_sb->s_blocksize - | |
1191 | sizeof(struct extendedFileEntry)); | |
5e0f0017 | 1192 | } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_FE)) { |
1da177e4 LT |
1193 | UDF_I_EFE(inode) = 0; |
1194 | UDF_I_USE(inode) = 0; | |
4b11111a MS |
1195 | if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize - |
1196 | sizeof(struct fileEntry))) { | |
647bd61a CG |
1197 | make_bad_inode(inode); |
1198 | return; | |
1199 | } | |
cb00ea35 CG |
1200 | memcpy(UDF_I_DATA(inode), bh->b_data + sizeof(struct fileEntry), |
1201 | inode->i_sb->s_blocksize - sizeof(struct fileEntry)); | |
5e0f0017 | 1202 | } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_USE)) { |
1da177e4 LT |
1203 | UDF_I_EFE(inode) = 0; |
1204 | UDF_I_USE(inode) = 1; | |
4b11111a MS |
1205 | UDF_I_LENALLOC(inode) = le32_to_cpu( |
1206 | ((struct unallocSpaceEntry *)bh->b_data)-> | |
1207 | lengthAllocDescs); | |
1208 | if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize - | |
1209 | sizeof(struct unallocSpaceEntry))) { | |
647bd61a CG |
1210 | make_bad_inode(inode); |
1211 | return; | |
1212 | } | |
4b11111a MS |
1213 | memcpy(UDF_I_DATA(inode), |
1214 | bh->b_data + sizeof(struct unallocSpaceEntry), | |
1215 | inode->i_sb->s_blocksize - | |
1216 | sizeof(struct unallocSpaceEntry)); | |
1da177e4 LT |
1217 | return; |
1218 | } | |
1219 | ||
1220 | inode->i_uid = le32_to_cpu(fe->uid); | |
ca76d2d8 CG |
1221 | if (inode->i_uid == -1 || |
1222 | UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_IGNORE) || | |
1223 | UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_SET)) | |
4d6660eb | 1224 | inode->i_uid = UDF_SB(inode->i_sb)->s_uid; |
1da177e4 LT |
1225 | |
1226 | inode->i_gid = le32_to_cpu(fe->gid); | |
ca76d2d8 CG |
1227 | if (inode->i_gid == -1 || |
1228 | UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_IGNORE) || | |
1229 | UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_SET)) | |
4d6660eb | 1230 | inode->i_gid = UDF_SB(inode->i_sb)->s_gid; |
1da177e4 LT |
1231 | |
1232 | inode->i_nlink = le16_to_cpu(fe->fileLinkCount); | |
1233 | if (!inode->i_nlink) | |
1234 | inode->i_nlink = 1; | |
647bd61a | 1235 | |
1da177e4 LT |
1236 | inode->i_size = le64_to_cpu(fe->informationLength); |
1237 | UDF_I_LENEXTENTS(inode) = inode->i_size; | |
1238 | ||
1239 | inode->i_mode = udf_convert_permissions(fe); | |
1240 | inode->i_mode &= ~UDF_SB(inode->i_sb)->s_umask; | |
1241 | ||
cb00ea35 | 1242 | if (UDF_I_EFE(inode) == 0) { |
1da177e4 | 1243 | inode->i_blocks = le64_to_cpu(fe->logicalBlocksRecorded) << |
28de7948 | 1244 | (inode->i_sb->s_blocksize_bits - 9); |
1da177e4 | 1245 | |
cb00ea35 CG |
1246 | if (udf_stamp_to_time(&convtime, &convtime_usec, |
1247 | lets_to_cpu(fe->accessTime))) { | |
1da177e4 LT |
1248 | inode->i_atime.tv_sec = convtime; |
1249 | inode->i_atime.tv_nsec = convtime_usec * 1000; | |
cb00ea35 | 1250 | } else { |
6c79e987 | 1251 | inode->i_atime = sbi->s_record_time; |
1da177e4 LT |
1252 | } |
1253 | ||
cb00ea35 CG |
1254 | if (udf_stamp_to_time(&convtime, &convtime_usec, |
1255 | lets_to_cpu(fe->modificationTime))) { | |
1da177e4 LT |
1256 | inode->i_mtime.tv_sec = convtime; |
1257 | inode->i_mtime.tv_nsec = convtime_usec * 1000; | |
cb00ea35 | 1258 | } else { |
6c79e987 | 1259 | inode->i_mtime = sbi->s_record_time; |
1da177e4 LT |
1260 | } |
1261 | ||
cb00ea35 CG |
1262 | if (udf_stamp_to_time(&convtime, &convtime_usec, |
1263 | lets_to_cpu(fe->attrTime))) { | |
1da177e4 LT |
1264 | inode->i_ctime.tv_sec = convtime; |
1265 | inode->i_ctime.tv_nsec = convtime_usec * 1000; | |
cb00ea35 | 1266 | } else { |
6c79e987 | 1267 | inode->i_ctime = sbi->s_record_time; |
1da177e4 LT |
1268 | } |
1269 | ||
1270 | UDF_I_UNIQUE(inode) = le64_to_cpu(fe->uniqueID); | |
1271 | UDF_I_LENEATTR(inode) = le32_to_cpu(fe->lengthExtendedAttr); | |
1272 | UDF_I_LENALLOC(inode) = le32_to_cpu(fe->lengthAllocDescs); | |
1273 | offset = sizeof(struct fileEntry) + UDF_I_LENEATTR(inode); | |
cb00ea35 | 1274 | } else { |
647bd61a | 1275 | inode->i_blocks = le64_to_cpu(efe->logicalBlocksRecorded) << |
cb00ea35 | 1276 | (inode->i_sb->s_blocksize_bits - 9); |
1da177e4 | 1277 | |
cb00ea35 CG |
1278 | if (udf_stamp_to_time(&convtime, &convtime_usec, |
1279 | lets_to_cpu(efe->accessTime))) { | |
1da177e4 LT |
1280 | inode->i_atime.tv_sec = convtime; |
1281 | inode->i_atime.tv_nsec = convtime_usec * 1000; | |
cb00ea35 | 1282 | } else { |
6c79e987 | 1283 | inode->i_atime = sbi->s_record_time; |
1da177e4 LT |
1284 | } |
1285 | ||
cb00ea35 CG |
1286 | if (udf_stamp_to_time(&convtime, &convtime_usec, |
1287 | lets_to_cpu(efe->modificationTime))) { | |
1da177e4 LT |
1288 | inode->i_mtime.tv_sec = convtime; |
1289 | inode->i_mtime.tv_nsec = convtime_usec * 1000; | |
cb00ea35 | 1290 | } else { |
6c79e987 | 1291 | inode->i_mtime = sbi->s_record_time; |
1da177e4 LT |
1292 | } |
1293 | ||
cb00ea35 CG |
1294 | if (udf_stamp_to_time(&convtime, &convtime_usec, |
1295 | lets_to_cpu(efe->createTime))) { | |
1da177e4 LT |
1296 | UDF_I_CRTIME(inode).tv_sec = convtime; |
1297 | UDF_I_CRTIME(inode).tv_nsec = convtime_usec * 1000; | |
cb00ea35 | 1298 | } else { |
6c79e987 | 1299 | UDF_I_CRTIME(inode) = sbi->s_record_time; |
1da177e4 LT |
1300 | } |
1301 | ||
cb00ea35 CG |
1302 | if (udf_stamp_to_time(&convtime, &convtime_usec, |
1303 | lets_to_cpu(efe->attrTime))) { | |
1da177e4 LT |
1304 | inode->i_ctime.tv_sec = convtime; |
1305 | inode->i_ctime.tv_nsec = convtime_usec * 1000; | |
cb00ea35 | 1306 | } else { |
6c79e987 | 1307 | inode->i_ctime = sbi->s_record_time; |
1da177e4 LT |
1308 | } |
1309 | ||
1310 | UDF_I_UNIQUE(inode) = le64_to_cpu(efe->uniqueID); | |
1311 | UDF_I_LENEATTR(inode) = le32_to_cpu(efe->lengthExtendedAttr); | |
1312 | UDF_I_LENALLOC(inode) = le32_to_cpu(efe->lengthAllocDescs); | |
4b11111a MS |
1313 | offset = sizeof(struct extendedFileEntry) + |
1314 | UDF_I_LENEATTR(inode); | |
1da177e4 LT |
1315 | } |
1316 | ||
cb00ea35 CG |
1317 | switch (fe->icbTag.fileType) { |
1318 | case ICBTAG_FILE_TYPE_DIRECTORY: | |
28de7948 CG |
1319 | inode->i_op = &udf_dir_inode_operations; |
1320 | inode->i_fop = &udf_dir_operations; | |
1321 | inode->i_mode |= S_IFDIR; | |
1322 | inc_nlink(inode); | |
1323 | break; | |
cb00ea35 CG |
1324 | case ICBTAG_FILE_TYPE_REALTIME: |
1325 | case ICBTAG_FILE_TYPE_REGULAR: | |
1326 | case ICBTAG_FILE_TYPE_UNDEF: | |
28de7948 CG |
1327 | if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_IN_ICB) |
1328 | inode->i_data.a_ops = &udf_adinicb_aops; | |
1329 | else | |
1330 | inode->i_data.a_ops = &udf_aops; | |
1331 | inode->i_op = &udf_file_inode_operations; | |
1332 | inode->i_fop = &udf_file_operations; | |
1333 | inode->i_mode |= S_IFREG; | |
1334 | break; | |
cb00ea35 | 1335 | case ICBTAG_FILE_TYPE_BLOCK: |
28de7948 CG |
1336 | inode->i_mode |= S_IFBLK; |
1337 | break; | |
cb00ea35 | 1338 | case ICBTAG_FILE_TYPE_CHAR: |
28de7948 CG |
1339 | inode->i_mode |= S_IFCHR; |
1340 | break; | |
cb00ea35 | 1341 | case ICBTAG_FILE_TYPE_FIFO: |
28de7948 CG |
1342 | init_special_inode(inode, inode->i_mode | S_IFIFO, 0); |
1343 | break; | |
cb00ea35 | 1344 | case ICBTAG_FILE_TYPE_SOCKET: |
28de7948 CG |
1345 | init_special_inode(inode, inode->i_mode | S_IFSOCK, 0); |
1346 | break; | |
cb00ea35 | 1347 | case ICBTAG_FILE_TYPE_SYMLINK: |
28de7948 CG |
1348 | inode->i_data.a_ops = &udf_symlink_aops; |
1349 | inode->i_op = &page_symlink_inode_operations; | |
1350 | inode->i_mode = S_IFLNK | S_IRWXUGO; | |
1351 | break; | |
cb00ea35 | 1352 | default: |
4b11111a MS |
1353 | printk(KERN_ERR "udf: udf_fill_inode(ino %ld) failed unknown " |
1354 | "file type=%d\n", inode->i_ino, | |
1355 | fe->icbTag.fileType); | |
28de7948 CG |
1356 | make_bad_inode(inode); |
1357 | return; | |
1da177e4 | 1358 | } |
cb00ea35 | 1359 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { |
4b11111a MS |
1360 | struct deviceSpec *dsea = |
1361 | (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1); | |
cb00ea35 CG |
1362 | if (dsea) { |
1363 | init_special_inode(inode, inode->i_mode, | |
4b11111a MS |
1364 | MKDEV(le32_to_cpu(dsea->majorDeviceIdent), |
1365 | le32_to_cpu(dsea->minorDeviceIdent))); | |
1da177e4 | 1366 | /* Developer ID ??? */ |
4b11111a | 1367 | } else |
1da177e4 | 1368 | make_bad_inode(inode); |
1da177e4 LT |
1369 | } |
1370 | } | |
1371 | ||
647bd61a CG |
1372 | static int udf_alloc_i_data(struct inode *inode, size_t size) |
1373 | { | |
1374 | UDF_I_DATA(inode) = kmalloc(size, GFP_KERNEL); | |
1375 | ||
cb00ea35 | 1376 | if (!UDF_I_DATA(inode)) { |
4b11111a MS |
1377 | printk(KERN_ERR "udf:udf_alloc_i_data (ino %ld) " |
1378 | "no free memory\n", inode->i_ino); | |
647bd61a CG |
1379 | return -ENOMEM; |
1380 | } | |
1381 | ||
1382 | return 0; | |
1383 | } | |
1384 | ||
cb00ea35 | 1385 | static mode_t udf_convert_permissions(struct fileEntry *fe) |
1da177e4 LT |
1386 | { |
1387 | mode_t mode; | |
1388 | uint32_t permissions; | |
1389 | uint32_t flags; | |
1390 | ||
1391 | permissions = le32_to_cpu(fe->permissions); | |
1392 | flags = le16_to_cpu(fe->icbTag.flags); | |
1393 | ||
4b11111a MS |
1394 | mode = ((permissions) & S_IRWXO) | |
1395 | ((permissions >> 2) & S_IRWXG) | | |
1396 | ((permissions >> 4) & S_IRWXU) | | |
1397 | ((flags & ICBTAG_FLAG_SETUID) ? S_ISUID : 0) | | |
1398 | ((flags & ICBTAG_FLAG_SETGID) ? S_ISGID : 0) | | |
1399 | ((flags & ICBTAG_FLAG_STICKY) ? S_ISVTX : 0); | |
1da177e4 LT |
1400 | |
1401 | return mode; | |
1402 | } | |
1403 | ||
1404 | /* | |
1405 | * udf_write_inode | |
1406 | * | |
1407 | * PURPOSE | |
1408 | * Write out the specified inode. | |
1409 | * | |
1410 | * DESCRIPTION | |
1411 | * This routine is called whenever an inode is synced. | |
1412 | * Currently this routine is just a placeholder. | |
1413 | * | |
1414 | * HISTORY | |
1415 | * July 1, 1997 - Andrew E. Mileski | |
1416 | * Written, tested, and released. | |
1417 | */ | |
1418 | ||
cb00ea35 | 1419 | int udf_write_inode(struct inode *inode, int sync) |
1da177e4 LT |
1420 | { |
1421 | int ret; | |
28de7948 | 1422 | |
1da177e4 LT |
1423 | lock_kernel(); |
1424 | ret = udf_update_inode(inode, sync); | |
1425 | unlock_kernel(); | |
28de7948 | 1426 | |
1da177e4 LT |
1427 | return ret; |
1428 | } | |
1429 | ||
cb00ea35 | 1430 | int udf_sync_inode(struct inode *inode) |
1da177e4 LT |
1431 | { |
1432 | return udf_update_inode(inode, 1); | |
1433 | } | |
1434 | ||
cb00ea35 | 1435 | static int udf_update_inode(struct inode *inode, int do_sync) |
1da177e4 LT |
1436 | { |
1437 | struct buffer_head *bh = NULL; | |
1438 | struct fileEntry *fe; | |
1439 | struct extendedFileEntry *efe; | |
1440 | uint32_t udfperms; | |
1441 | uint16_t icbflags; | |
1442 | uint16_t crclen; | |
1da177e4 LT |
1443 | kernel_timestamp cpu_time; |
1444 | int err = 0; | |
6c79e987 | 1445 | struct udf_sb_info *sbi = UDF_SB(inode->i_sb); |
4b11111a | 1446 | unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; |
1da177e4 | 1447 | |
4b11111a MS |
1448 | bh = udf_tread(inode->i_sb, |
1449 | udf_get_lb_pblock(inode->i_sb, | |
1450 | UDF_I_LOCATION(inode), 0)); | |
cb00ea35 | 1451 | if (!bh) { |
1da177e4 LT |
1452 | udf_debug("bread failure\n"); |
1453 | return -EIO; | |
1454 | } | |
1455 | ||
1456 | memset(bh->b_data, 0x00, inode->i_sb->s_blocksize); | |
1457 | ||
1458 | fe = (struct fileEntry *)bh->b_data; | |
1459 | efe = (struct extendedFileEntry *)bh->b_data; | |
1460 | ||
5e0f0017 | 1461 | if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_USE)) { |
1da177e4 | 1462 | struct unallocSpaceEntry *use = |
28de7948 | 1463 | (struct unallocSpaceEntry *)bh->b_data; |
1da177e4 LT |
1464 | |
1465 | use->lengthAllocDescs = cpu_to_le32(UDF_I_LENALLOC(inode)); | |
4b11111a MS |
1466 | memcpy(bh->b_data + sizeof(struct unallocSpaceEntry), |
1467 | UDF_I_DATA(inode), inode->i_sb->s_blocksize - | |
1468 | sizeof(struct unallocSpaceEntry)); | |
1469 | crclen = sizeof(struct unallocSpaceEntry) + | |
1470 | UDF_I_LENALLOC(inode) - sizeof(tag); | |
1471 | use->descTag.tagLocation = cpu_to_le32( | |
1472 | UDF_I_LOCATION(inode). | |
1473 | logicalBlockNum); | |
1da177e4 | 1474 | use->descTag.descCRCLength = cpu_to_le16(crclen); |
4b11111a MS |
1475 | use->descTag.descCRC = cpu_to_le16(udf_crc((char *)use + |
1476 | sizeof(tag), crclen, | |
1477 | 0)); | |
3f2587bb | 1478 | use->descTag.tagChecksum = udf_tag_checksum(&use->descTag); |
1da177e4 LT |
1479 | |
1480 | mark_buffer_dirty(bh); | |
3bf25cb4 | 1481 | brelse(bh); |
1da177e4 LT |
1482 | return err; |
1483 | } | |
1484 | ||
4d6660eb PS |
1485 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_FORGET)) |
1486 | fe->uid = cpu_to_le32(-1); | |
cb00ea35 CG |
1487 | else |
1488 | fe->uid = cpu_to_le32(inode->i_uid); | |
1da177e4 | 1489 | |
4d6660eb PS |
1490 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_FORGET)) |
1491 | fe->gid = cpu_to_le32(-1); | |
cb00ea35 CG |
1492 | else |
1493 | fe->gid = cpu_to_le32(inode->i_gid); | |
1da177e4 | 1494 | |
4b11111a MS |
1495 | udfperms = ((inode->i_mode & S_IRWXO)) | |
1496 | ((inode->i_mode & S_IRWXG) << 2) | | |
1497 | ((inode->i_mode & S_IRWXU) << 4); | |
1da177e4 | 1498 | |
4b11111a MS |
1499 | udfperms |= (le32_to_cpu(fe->permissions) & |
1500 | (FE_PERM_O_DELETE | FE_PERM_O_CHATTR | | |
1501 | FE_PERM_G_DELETE | FE_PERM_G_CHATTR | | |
1502 | FE_PERM_U_DELETE | FE_PERM_U_CHATTR)); | |
1da177e4 LT |
1503 | fe->permissions = cpu_to_le32(udfperms); |
1504 | ||
1505 | if (S_ISDIR(inode->i_mode)) | |
1506 | fe->fileLinkCount = cpu_to_le16(inode->i_nlink - 1); | |
1507 | else | |
1508 | fe->fileLinkCount = cpu_to_le16(inode->i_nlink); | |
1509 | ||
1510 | fe->informationLength = cpu_to_le64(inode->i_size); | |
1511 | ||
cb00ea35 | 1512 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { |
1da177e4 | 1513 | regid *eid; |
28de7948 CG |
1514 | struct deviceSpec *dsea = |
1515 | (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1); | |
cb00ea35 | 1516 | if (!dsea) { |
1da177e4 | 1517 | dsea = (struct deviceSpec *) |
28de7948 CG |
1518 | udf_add_extendedattr(inode, |
1519 | sizeof(struct deviceSpec) + | |
1520 | sizeof(regid), 12, 0x3); | |
1da177e4 LT |
1521 | dsea->attrType = cpu_to_le32(12); |
1522 | dsea->attrSubtype = 1; | |
4b11111a MS |
1523 | dsea->attrLength = cpu_to_le32( |
1524 | sizeof(struct deviceSpec) + | |
1525 | sizeof(regid)); | |
1da177e4 LT |
1526 | dsea->impUseLength = cpu_to_le32(sizeof(regid)); |
1527 | } | |
28de7948 | 1528 | eid = (regid *)dsea->impUse; |
1da177e4 LT |
1529 | memset(eid, 0, sizeof(regid)); |
1530 | strcpy(eid->ident, UDF_ID_DEVELOPER); | |
1531 | eid->identSuffix[0] = UDF_OS_CLASS_UNIX; | |
1532 | eid->identSuffix[1] = UDF_OS_ID_LINUX; | |
1533 | dsea->majorDeviceIdent = cpu_to_le32(imajor(inode)); | |
1534 | dsea->minorDeviceIdent = cpu_to_le32(iminor(inode)); | |
1535 | } | |
1536 | ||
cb00ea35 CG |
1537 | if (UDF_I_EFE(inode) == 0) { |
1538 | memcpy(bh->b_data + sizeof(struct fileEntry), UDF_I_DATA(inode), | |
1539 | inode->i_sb->s_blocksize - sizeof(struct fileEntry)); | |
28de7948 | 1540 | fe->logicalBlocksRecorded = cpu_to_le64( |
4b11111a MS |
1541 | (inode->i_blocks + (1 << (blocksize_bits - 9)) - 1) >> |
1542 | (blocksize_bits - 9)); | |
1da177e4 LT |
1543 | |
1544 | if (udf_time_to_stamp(&cpu_time, inode->i_atime)) | |
1545 | fe->accessTime = cpu_to_lets(cpu_time); | |
1546 | if (udf_time_to_stamp(&cpu_time, inode->i_mtime)) | |
1547 | fe->modificationTime = cpu_to_lets(cpu_time); | |
1548 | if (udf_time_to_stamp(&cpu_time, inode->i_ctime)) | |
1549 | fe->attrTime = cpu_to_lets(cpu_time); | |
1550 | memset(&(fe->impIdent), 0, sizeof(regid)); | |
1551 | strcpy(fe->impIdent.ident, UDF_ID_DEVELOPER); | |
1552 | fe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; | |
1553 | fe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; | |
1554 | fe->uniqueID = cpu_to_le64(UDF_I_UNIQUE(inode)); | |
1555 | fe->lengthExtendedAttr = cpu_to_le32(UDF_I_LENEATTR(inode)); | |
1556 | fe->lengthAllocDescs = cpu_to_le32(UDF_I_LENALLOC(inode)); | |
1557 | fe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_FE); | |
1558 | crclen = sizeof(struct fileEntry); | |
cb00ea35 | 1559 | } else { |
4b11111a MS |
1560 | memcpy(bh->b_data + sizeof(struct extendedFileEntry), |
1561 | UDF_I_DATA(inode), | |
1562 | inode->i_sb->s_blocksize - | |
1563 | sizeof(struct extendedFileEntry)); | |
1da177e4 | 1564 | efe->objectSize = cpu_to_le64(inode->i_size); |
28de7948 | 1565 | efe->logicalBlocksRecorded = cpu_to_le64( |
4b11111a MS |
1566 | (inode->i_blocks + (1 << (blocksize_bits - 9)) - 1) >> |
1567 | (blocksize_bits - 9)); | |
1da177e4 LT |
1568 | |
1569 | if (UDF_I_CRTIME(inode).tv_sec > inode->i_atime.tv_sec || | |
cb00ea35 | 1570 | (UDF_I_CRTIME(inode).tv_sec == inode->i_atime.tv_sec && |
4b11111a | 1571 | UDF_I_CRTIME(inode).tv_nsec > inode->i_atime.tv_nsec)) |
1da177e4 | 1572 | UDF_I_CRTIME(inode) = inode->i_atime; |
4b11111a | 1573 | |
1da177e4 | 1574 | if (UDF_I_CRTIME(inode).tv_sec > inode->i_mtime.tv_sec || |
cb00ea35 | 1575 | (UDF_I_CRTIME(inode).tv_sec == inode->i_mtime.tv_sec && |
4b11111a | 1576 | UDF_I_CRTIME(inode).tv_nsec > inode->i_mtime.tv_nsec)) |
1da177e4 | 1577 | UDF_I_CRTIME(inode) = inode->i_mtime; |
4b11111a | 1578 | |
1da177e4 | 1579 | if (UDF_I_CRTIME(inode).tv_sec > inode->i_ctime.tv_sec || |
cb00ea35 | 1580 | (UDF_I_CRTIME(inode).tv_sec == inode->i_ctime.tv_sec && |
4b11111a | 1581 | UDF_I_CRTIME(inode).tv_nsec > inode->i_ctime.tv_nsec)) |
1da177e4 | 1582 | UDF_I_CRTIME(inode) = inode->i_ctime; |
1da177e4 LT |
1583 | |
1584 | if (udf_time_to_stamp(&cpu_time, inode->i_atime)) | |
1585 | efe->accessTime = cpu_to_lets(cpu_time); | |
1586 | if (udf_time_to_stamp(&cpu_time, inode->i_mtime)) | |
1587 | efe->modificationTime = cpu_to_lets(cpu_time); | |
1588 | if (udf_time_to_stamp(&cpu_time, UDF_I_CRTIME(inode))) | |
1589 | efe->createTime = cpu_to_lets(cpu_time); | |
1590 | if (udf_time_to_stamp(&cpu_time, inode->i_ctime)) | |
1591 | efe->attrTime = cpu_to_lets(cpu_time); | |
1592 | ||
1593 | memset(&(efe->impIdent), 0, sizeof(regid)); | |
1594 | strcpy(efe->impIdent.ident, UDF_ID_DEVELOPER); | |
1595 | efe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; | |
1596 | efe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; | |
1597 | efe->uniqueID = cpu_to_le64(UDF_I_UNIQUE(inode)); | |
1598 | efe->lengthExtendedAttr = cpu_to_le32(UDF_I_LENEATTR(inode)); | |
1599 | efe->lengthAllocDescs = cpu_to_le32(UDF_I_LENALLOC(inode)); | |
1600 | efe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_EFE); | |
1601 | crclen = sizeof(struct extendedFileEntry); | |
1602 | } | |
cb00ea35 | 1603 | if (UDF_I_STRAT4096(inode)) { |
1da177e4 LT |
1604 | fe->icbTag.strategyType = cpu_to_le16(4096); |
1605 | fe->icbTag.strategyParameter = cpu_to_le16(1); | |
1606 | fe->icbTag.numEntries = cpu_to_le16(2); | |
cb00ea35 | 1607 | } else { |
1da177e4 LT |
1608 | fe->icbTag.strategyType = cpu_to_le16(4); |
1609 | fe->icbTag.numEntries = cpu_to_le16(1); | |
1610 | } | |
1611 | ||
1612 | if (S_ISDIR(inode->i_mode)) | |
1613 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_DIRECTORY; | |
1614 | else if (S_ISREG(inode->i_mode)) | |
1615 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_REGULAR; | |
1616 | else if (S_ISLNK(inode->i_mode)) | |
1617 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_SYMLINK; | |
1618 | else if (S_ISBLK(inode->i_mode)) | |
1619 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_BLOCK; | |
1620 | else if (S_ISCHR(inode->i_mode)) | |
1621 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_CHAR; | |
1622 | else if (S_ISFIFO(inode->i_mode)) | |
1623 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_FIFO; | |
1624 | else if (S_ISSOCK(inode->i_mode)) | |
1625 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_SOCKET; | |
1626 | ||
28de7948 CG |
1627 | icbflags = UDF_I_ALLOCTYPE(inode) | |
1628 | ((inode->i_mode & S_ISUID) ? ICBTAG_FLAG_SETUID : 0) | | |
1629 | ((inode->i_mode & S_ISGID) ? ICBTAG_FLAG_SETGID : 0) | | |
1630 | ((inode->i_mode & S_ISVTX) ? ICBTAG_FLAG_STICKY : 0) | | |
1631 | (le16_to_cpu(fe->icbTag.flags) & | |
1632 | ~(ICBTAG_FLAG_AD_MASK | ICBTAG_FLAG_SETUID | | |
1633 | ICBTAG_FLAG_SETGID | ICBTAG_FLAG_STICKY)); | |
1da177e4 LT |
1634 | |
1635 | fe->icbTag.flags = cpu_to_le16(icbflags); | |
6c79e987 | 1636 | if (sbi->s_udfrev >= 0x0200) |
1da177e4 LT |
1637 | fe->descTag.descVersion = cpu_to_le16(3); |
1638 | else | |
1639 | fe->descTag.descVersion = cpu_to_le16(2); | |
6c79e987 | 1640 | fe->descTag.tagSerialNum = cpu_to_le16(sbi->s_serial_number); |
4b11111a MS |
1641 | fe->descTag.tagLocation = cpu_to_le32( |
1642 | UDF_I_LOCATION(inode).logicalBlockNum); | |
1da177e4 LT |
1643 | crclen += UDF_I_LENEATTR(inode) + UDF_I_LENALLOC(inode) - sizeof(tag); |
1644 | fe->descTag.descCRCLength = cpu_to_le16(crclen); | |
4b11111a MS |
1645 | fe->descTag.descCRC = cpu_to_le16(udf_crc((char *)fe + sizeof(tag), |
1646 | crclen, 0)); | |
3f2587bb | 1647 | fe->descTag.tagChecksum = udf_tag_checksum(&fe->descTag); |
1da177e4 LT |
1648 | |
1649 | /* write the data blocks */ | |
1650 | mark_buffer_dirty(bh); | |
cb00ea35 | 1651 | if (do_sync) { |
1da177e4 | 1652 | sync_dirty_buffer(bh); |
cb00ea35 | 1653 | if (buffer_req(bh) && !buffer_uptodate(bh)) { |
4b11111a MS |
1654 | printk(KERN_WARNING "IO error syncing udf inode " |
1655 | "[%s:%08lx]\n", inode->i_sb->s_id, | |
1656 | inode->i_ino); | |
1da177e4 LT |
1657 | err = -EIO; |
1658 | } | |
1659 | } | |
3bf25cb4 | 1660 | brelse(bh); |
28de7948 | 1661 | |
1da177e4 LT |
1662 | return err; |
1663 | } | |
1664 | ||
cb00ea35 | 1665 | struct inode *udf_iget(struct super_block *sb, kernel_lb_addr ino) |
1da177e4 LT |
1666 | { |
1667 | unsigned long block = udf_get_lb_pblock(sb, ino, 0); | |
1668 | struct inode *inode = iget_locked(sb, block); | |
1669 | ||
1670 | if (!inode) | |
1671 | return NULL; | |
1672 | ||
1673 | if (inode->i_state & I_NEW) { | |
1674 | memcpy(&UDF_I_LOCATION(inode), &ino, sizeof(kernel_lb_addr)); | |
1675 | __udf_read_inode(inode); | |
1676 | unlock_new_inode(inode); | |
1677 | } | |
1678 | ||
1679 | if (is_bad_inode(inode)) | |
1680 | goto out_iput; | |
1681 | ||
4b11111a MS |
1682 | if (ino.logicalBlockNum >= UDF_SB(sb)-> |
1683 | s_partmaps[ino.partitionReferenceNum].s_partition_len) { | |
1da177e4 | 1684 | udf_debug("block=%d, partition=%d out of range\n", |
cb00ea35 | 1685 | ino.logicalBlockNum, ino.partitionReferenceNum); |
1da177e4 LT |
1686 | make_bad_inode(inode); |
1687 | goto out_iput; | |
1688 | } | |
1689 | ||
1690 | return inode; | |
1691 | ||
28de7948 | 1692 | out_iput: |
1da177e4 LT |
1693 | iput(inode); |
1694 | return NULL; | |
1695 | } | |
1696 | ||
4b11111a | 1697 | int8_t udf_add_aext(struct inode *inode, struct extent_position *epos, |
cb00ea35 | 1698 | kernel_lb_addr eloc, uint32_t elen, int inc) |
1da177e4 LT |
1699 | { |
1700 | int adsize; | |
1701 | short_ad *sad = NULL; | |
1702 | long_ad *lad = NULL; | |
1703 | struct allocExtDesc *aed; | |
1704 | int8_t etype; | |
1705 | uint8_t *ptr; | |
1706 | ||
ff116fc8 | 1707 | if (!epos->bh) |
4b11111a MS |
1708 | ptr = UDF_I_DATA(inode) + epos->offset - |
1709 | udf_file_entry_alloc_offset(inode) + | |
1710 | UDF_I_LENEATTR(inode); | |
1da177e4 | 1711 | else |
ff116fc8 | 1712 | ptr = epos->bh->b_data + epos->offset; |
1da177e4 LT |
1713 | |
1714 | if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_SHORT) | |
1715 | adsize = sizeof(short_ad); | |
1716 | else if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_LONG) | |
1717 | adsize = sizeof(long_ad); | |
1718 | else | |
1719 | return -1; | |
1720 | ||
cb00ea35 | 1721 | if (epos->offset + (2 * adsize) > inode->i_sb->s_blocksize) { |
1da177e4 LT |
1722 | char *sptr, *dptr; |
1723 | struct buffer_head *nbh; | |
1724 | int err, loffset; | |
ff116fc8 | 1725 | kernel_lb_addr obloc = epos->block; |
1da177e4 | 1726 | |
4b11111a MS |
1727 | epos->block.logicalBlockNum = udf_new_block(inode->i_sb, NULL, |
1728 | obloc.partitionReferenceNum, | |
1729 | obloc.logicalBlockNum, &err); | |
1730 | if (!epos->block.logicalBlockNum) | |
1da177e4 | 1731 | return -1; |
4b11111a MS |
1732 | nbh = udf_tgetblk(inode->i_sb, udf_get_lb_pblock(inode->i_sb, |
1733 | epos->block, | |
1734 | 0)); | |
1735 | if (!nbh) | |
1da177e4 | 1736 | return -1; |
1da177e4 LT |
1737 | lock_buffer(nbh); |
1738 | memset(nbh->b_data, 0x00, inode->i_sb->s_blocksize); | |
1739 | set_buffer_uptodate(nbh); | |
1740 | unlock_buffer(nbh); | |
1741 | mark_buffer_dirty_inode(nbh, inode); | |
1742 | ||
1743 | aed = (struct allocExtDesc *)(nbh->b_data); | |
1744 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT)) | |
4b11111a MS |
1745 | aed->previousAllocExtLocation = |
1746 | cpu_to_le32(obloc.logicalBlockNum); | |
cb00ea35 | 1747 | if (epos->offset + adsize > inode->i_sb->s_blocksize) { |
ff116fc8 | 1748 | loffset = epos->offset; |
1da177e4 LT |
1749 | aed->lengthAllocDescs = cpu_to_le32(adsize); |
1750 | sptr = ptr - adsize; | |
1751 | dptr = nbh->b_data + sizeof(struct allocExtDesc); | |
1752 | memcpy(dptr, sptr, adsize); | |
ff116fc8 | 1753 | epos->offset = sizeof(struct allocExtDesc) + adsize; |
cb00ea35 | 1754 | } else { |
ff116fc8 | 1755 | loffset = epos->offset + adsize; |
1da177e4 LT |
1756 | aed->lengthAllocDescs = cpu_to_le32(0); |
1757 | sptr = ptr; | |
ff116fc8 | 1758 | epos->offset = sizeof(struct allocExtDesc); |
1da177e4 | 1759 | |
cb00ea35 | 1760 | if (epos->bh) { |
ff116fc8 | 1761 | aed = (struct allocExtDesc *)epos->bh->b_data; |
1da177e4 | 1762 | aed->lengthAllocDescs = |
4b11111a MS |
1763 | cpu_to_le32(le32_to_cpu( |
1764 | aed->lengthAllocDescs) + adsize); | |
cb00ea35 | 1765 | } else { |
1da177e4 LT |
1766 | UDF_I_LENALLOC(inode) += adsize; |
1767 | mark_inode_dirty(inode); | |
1768 | } | |
1769 | } | |
6c79e987 | 1770 | if (UDF_SB(inode->i_sb)->s_udfrev >= 0x0200) |
1da177e4 | 1771 | udf_new_tag(nbh->b_data, TAG_IDENT_AED, 3, 1, |
cb00ea35 | 1772 | epos->block.logicalBlockNum, sizeof(tag)); |
1da177e4 LT |
1773 | else |
1774 | udf_new_tag(nbh->b_data, TAG_IDENT_AED, 2, 1, | |
cb00ea35 CG |
1775 | epos->block.logicalBlockNum, sizeof(tag)); |
1776 | switch (UDF_I_ALLOCTYPE(inode)) { | |
1777 | case ICBTAG_FLAG_AD_SHORT: | |
28de7948 CG |
1778 | sad = (short_ad *)sptr; |
1779 | sad->extLength = cpu_to_le32(EXT_NEXT_EXTENT_ALLOCDECS | | |
1780 | inode->i_sb->s_blocksize); | |
4b11111a MS |
1781 | sad->extPosition = |
1782 | cpu_to_le32(epos->block.logicalBlockNum); | |
28de7948 | 1783 | break; |
cb00ea35 | 1784 | case ICBTAG_FLAG_AD_LONG: |
28de7948 CG |
1785 | lad = (long_ad *)sptr; |
1786 | lad->extLength = cpu_to_le32(EXT_NEXT_EXTENT_ALLOCDECS | | |
1787 | inode->i_sb->s_blocksize); | |
1788 | lad->extLocation = cpu_to_lelb(epos->block); | |
1789 | memset(lad->impUse, 0x00, sizeof(lad->impUse)); | |
1790 | break; | |
1da177e4 | 1791 | } |
cb00ea35 | 1792 | if (epos->bh) { |
28de7948 | 1793 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
6c79e987 | 1794 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) |
ff116fc8 | 1795 | udf_update_tag(epos->bh->b_data, loffset); |
1da177e4 | 1796 | else |
4b11111a MS |
1797 | udf_update_tag(epos->bh->b_data, |
1798 | sizeof(struct allocExtDesc)); | |
ff116fc8 | 1799 | mark_buffer_dirty_inode(epos->bh, inode); |
3bf25cb4 | 1800 | brelse(epos->bh); |
28de7948 | 1801 | } else { |
1da177e4 | 1802 | mark_inode_dirty(inode); |
28de7948 | 1803 | } |
ff116fc8 | 1804 | epos->bh = nbh; |
1da177e4 LT |
1805 | } |
1806 | ||
ff116fc8 | 1807 | etype = udf_write_aext(inode, epos, eloc, elen, inc); |
1da177e4 | 1808 | |
cb00ea35 | 1809 | if (!epos->bh) { |
1da177e4 LT |
1810 | UDF_I_LENALLOC(inode) += adsize; |
1811 | mark_inode_dirty(inode); | |
cb00ea35 | 1812 | } else { |
ff116fc8 | 1813 | aed = (struct allocExtDesc *)epos->bh->b_data; |
1da177e4 | 1814 | aed->lengthAllocDescs = |
4b11111a MS |
1815 | cpu_to_le32(le32_to_cpu(aed->lengthAllocDescs) + |
1816 | adsize); | |
1817 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || | |
1818 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) | |
1819 | udf_update_tag(epos->bh->b_data, | |
1820 | epos->offset + (inc ? 0 : adsize)); | |
1da177e4 | 1821 | else |
4b11111a MS |
1822 | udf_update_tag(epos->bh->b_data, |
1823 | sizeof(struct allocExtDesc)); | |
ff116fc8 | 1824 | mark_buffer_dirty_inode(epos->bh, inode); |
1da177e4 LT |
1825 | } |
1826 | ||
1827 | return etype; | |
1828 | } | |
1829 | ||
4b11111a | 1830 | int8_t udf_write_aext(struct inode *inode, struct extent_position *epos, |
cb00ea35 | 1831 | kernel_lb_addr eloc, uint32_t elen, int inc) |
1da177e4 LT |
1832 | { |
1833 | int adsize; | |
1834 | uint8_t *ptr; | |
28de7948 CG |
1835 | short_ad *sad; |
1836 | long_ad *lad; | |
1da177e4 | 1837 | |
ff116fc8 | 1838 | if (!epos->bh) |
4b11111a MS |
1839 | ptr = UDF_I_DATA(inode) + epos->offset - |
1840 | udf_file_entry_alloc_offset(inode) + | |
1841 | UDF_I_LENEATTR(inode); | |
1da177e4 | 1842 | else |
ff116fc8 | 1843 | ptr = epos->bh->b_data + epos->offset; |
1da177e4 | 1844 | |
cb00ea35 CG |
1845 | switch (UDF_I_ALLOCTYPE(inode)) { |
1846 | case ICBTAG_FLAG_AD_SHORT: | |
28de7948 CG |
1847 | sad = (short_ad *)ptr; |
1848 | sad->extLength = cpu_to_le32(elen); | |
1849 | sad->extPosition = cpu_to_le32(eloc.logicalBlockNum); | |
1850 | adsize = sizeof(short_ad); | |
1851 | break; | |
cb00ea35 | 1852 | case ICBTAG_FLAG_AD_LONG: |
28de7948 CG |
1853 | lad = (long_ad *)ptr; |
1854 | lad->extLength = cpu_to_le32(elen); | |
1855 | lad->extLocation = cpu_to_lelb(eloc); | |
1856 | memset(lad->impUse, 0x00, sizeof(lad->impUse)); | |
1857 | adsize = sizeof(long_ad); | |
1858 | break; | |
cb00ea35 CG |
1859 | default: |
1860 | return -1; | |
1da177e4 LT |
1861 | } |
1862 | ||
cb00ea35 | 1863 | if (epos->bh) { |
28de7948 | 1864 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
6c79e987 | 1865 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) { |
4b11111a MS |
1866 | struct allocExtDesc *aed = |
1867 | (struct allocExtDesc *)epos->bh->b_data; | |
ff116fc8 | 1868 | udf_update_tag(epos->bh->b_data, |
4b11111a MS |
1869 | le32_to_cpu(aed->lengthAllocDescs) + |
1870 | sizeof(struct allocExtDesc)); | |
1da177e4 | 1871 | } |
ff116fc8 | 1872 | mark_buffer_dirty_inode(epos->bh, inode); |
28de7948 | 1873 | } else { |
1da177e4 | 1874 | mark_inode_dirty(inode); |
28de7948 | 1875 | } |
1da177e4 LT |
1876 | |
1877 | if (inc) | |
ff116fc8 | 1878 | epos->offset += adsize; |
28de7948 | 1879 | |
1da177e4 LT |
1880 | return (elen >> 30); |
1881 | } | |
1882 | ||
4b11111a MS |
1883 | int8_t udf_next_aext(struct inode *inode, struct extent_position *epos, |
1884 | kernel_lb_addr *eloc, uint32_t *elen, int inc) | |
1da177e4 LT |
1885 | { |
1886 | int8_t etype; | |
1887 | ||
ff116fc8 | 1888 | while ((etype = udf_current_aext(inode, epos, eloc, elen, inc)) == |
cb00ea35 | 1889 | (EXT_NEXT_EXTENT_ALLOCDECS >> 30)) { |
4b11111a | 1890 | int block; |
ff116fc8 JK |
1891 | epos->block = *eloc; |
1892 | epos->offset = sizeof(struct allocExtDesc); | |
3bf25cb4 | 1893 | brelse(epos->bh); |
4b11111a MS |
1894 | block = udf_get_lb_pblock(inode->i_sb, epos->block, 0); |
1895 | epos->bh = udf_tread(inode->i_sb, block); | |
1896 | if (!epos->bh) { | |
1897 | udf_debug("reading block %d failed!\n", block); | |
1da177e4 LT |
1898 | return -1; |
1899 | } | |
1900 | } | |
1901 | ||
1902 | return etype; | |
1903 | } | |
1904 | ||
4b11111a MS |
1905 | int8_t udf_current_aext(struct inode *inode, struct extent_position *epos, |
1906 | kernel_lb_addr *eloc, uint32_t *elen, int inc) | |
1da177e4 LT |
1907 | { |
1908 | int alen; | |
1909 | int8_t etype; | |
1910 | uint8_t *ptr; | |
28de7948 CG |
1911 | short_ad *sad; |
1912 | long_ad *lad; | |
1913 | ||
cb00ea35 | 1914 | if (!epos->bh) { |
ff116fc8 JK |
1915 | if (!epos->offset) |
1916 | epos->offset = udf_file_entry_alloc_offset(inode); | |
4b11111a MS |
1917 | ptr = UDF_I_DATA(inode) + epos->offset - |
1918 | udf_file_entry_alloc_offset(inode) + | |
1919 | UDF_I_LENEATTR(inode); | |
1920 | alen = udf_file_entry_alloc_offset(inode) + | |
1921 | UDF_I_LENALLOC(inode); | |
cb00ea35 | 1922 | } else { |
ff116fc8 JK |
1923 | if (!epos->offset) |
1924 | epos->offset = sizeof(struct allocExtDesc); | |
1925 | ptr = epos->bh->b_data + epos->offset; | |
28de7948 | 1926 | alen = sizeof(struct allocExtDesc) + |
4b11111a MS |
1927 | le32_to_cpu(((struct allocExtDesc *)epos->bh->b_data)-> |
1928 | lengthAllocDescs); | |
1da177e4 LT |
1929 | } |
1930 | ||
cb00ea35 CG |
1931 | switch (UDF_I_ALLOCTYPE(inode)) { |
1932 | case ICBTAG_FLAG_AD_SHORT: | |
4b11111a MS |
1933 | sad = udf_get_fileshortad(ptr, alen, &epos->offset, inc); |
1934 | if (!sad) | |
28de7948 CG |
1935 | return -1; |
1936 | etype = le32_to_cpu(sad->extLength) >> 30; | |
1937 | eloc->logicalBlockNum = le32_to_cpu(sad->extPosition); | |
4b11111a MS |
1938 | eloc->partitionReferenceNum = |
1939 | UDF_I_LOCATION(inode).partitionReferenceNum; | |
28de7948 CG |
1940 | *elen = le32_to_cpu(sad->extLength) & UDF_EXTENT_LENGTH_MASK; |
1941 | break; | |
cb00ea35 | 1942 | case ICBTAG_FLAG_AD_LONG: |
4b11111a MS |
1943 | lad = udf_get_filelongad(ptr, alen, &epos->offset, inc); |
1944 | if (!lad) | |
1da177e4 | 1945 | return -1; |
28de7948 CG |
1946 | etype = le32_to_cpu(lad->extLength) >> 30; |
1947 | *eloc = lelb_to_cpu(lad->extLocation); | |
1948 | *elen = le32_to_cpu(lad->extLength) & UDF_EXTENT_LENGTH_MASK; | |
1949 | break; | |
1950 | default: | |
4b11111a MS |
1951 | udf_debug("alloc_type = %d unsupported\n", |
1952 | UDF_I_ALLOCTYPE(inode)); | |
28de7948 | 1953 | return -1; |
1da177e4 LT |
1954 | } |
1955 | ||
1956 | return etype; | |
1957 | } | |
1958 | ||
28de7948 CG |
1959 | static int8_t udf_insert_aext(struct inode *inode, struct extent_position epos, |
1960 | kernel_lb_addr neloc, uint32_t nelen) | |
1da177e4 LT |
1961 | { |
1962 | kernel_lb_addr oeloc; | |
1963 | uint32_t oelen; | |
1964 | int8_t etype; | |
1965 | ||
ff116fc8 | 1966 | if (epos.bh) |
3bf25cb4 | 1967 | get_bh(epos.bh); |
1da177e4 | 1968 | |
cb00ea35 | 1969 | while ((etype = udf_next_aext(inode, &epos, &oeloc, &oelen, 0)) != -1) { |
ff116fc8 | 1970 | udf_write_aext(inode, &epos, neloc, nelen, 1); |
1da177e4 LT |
1971 | neloc = oeloc; |
1972 | nelen = (etype << 30) | oelen; | |
1973 | } | |
ff116fc8 | 1974 | udf_add_aext(inode, &epos, neloc, nelen, 1); |
3bf25cb4 | 1975 | brelse(epos.bh); |
28de7948 | 1976 | |
1da177e4 LT |
1977 | return (nelen >> 30); |
1978 | } | |
1979 | ||
4b11111a | 1980 | int8_t udf_delete_aext(struct inode *inode, struct extent_position epos, |
cb00ea35 | 1981 | kernel_lb_addr eloc, uint32_t elen) |
1da177e4 | 1982 | { |
ff116fc8 JK |
1983 | struct extent_position oepos; |
1984 | int adsize; | |
1da177e4 LT |
1985 | int8_t etype; |
1986 | struct allocExtDesc *aed; | |
1987 | ||
cb00ea35 | 1988 | if (epos.bh) { |
3bf25cb4 JK |
1989 | get_bh(epos.bh); |
1990 | get_bh(epos.bh); | |
1da177e4 LT |
1991 | } |
1992 | ||
1993 | if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_SHORT) | |
1994 | adsize = sizeof(short_ad); | |
1995 | else if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_LONG) | |
1996 | adsize = sizeof(long_ad); | |
1997 | else | |
1998 | adsize = 0; | |
1999 | ||
ff116fc8 JK |
2000 | oepos = epos; |
2001 | if (udf_next_aext(inode, &epos, &eloc, &elen, 1) == -1) | |
1da177e4 LT |
2002 | return -1; |
2003 | ||
cb00ea35 | 2004 | while ((etype = udf_next_aext(inode, &epos, &eloc, &elen, 1)) != -1) { |
ff116fc8 | 2005 | udf_write_aext(inode, &oepos, eloc, (etype << 30) | elen, 1); |
cb00ea35 | 2006 | if (oepos.bh != epos.bh) { |
ff116fc8 | 2007 | oepos.block = epos.block; |
3bf25cb4 JK |
2008 | brelse(oepos.bh); |
2009 | get_bh(epos.bh); | |
ff116fc8 JK |
2010 | oepos.bh = epos.bh; |
2011 | oepos.offset = epos.offset - adsize; | |
1da177e4 LT |
2012 | } |
2013 | } | |
2014 | memset(&eloc, 0x00, sizeof(kernel_lb_addr)); | |
2015 | elen = 0; | |
2016 | ||
cb00ea35 | 2017 | if (epos.bh != oepos.bh) { |
ff116fc8 JK |
2018 | udf_free_blocks(inode->i_sb, inode, epos.block, 0, 1); |
2019 | udf_write_aext(inode, &oepos, eloc, elen, 1); | |
2020 | udf_write_aext(inode, &oepos, eloc, elen, 1); | |
cb00ea35 | 2021 | if (!oepos.bh) { |
1da177e4 LT |
2022 | UDF_I_LENALLOC(inode) -= (adsize * 2); |
2023 | mark_inode_dirty(inode); | |
cb00ea35 | 2024 | } else { |
ff116fc8 | 2025 | aed = (struct allocExtDesc *)oepos.bh->b_data; |
1da177e4 | 2026 | aed->lengthAllocDescs = |
4b11111a MS |
2027 | cpu_to_le32(le32_to_cpu(aed->lengthAllocDescs) - |
2028 | (2 * adsize)); | |
28de7948 | 2029 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
6c79e987 | 2030 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) |
4b11111a MS |
2031 | udf_update_tag(oepos.bh->b_data, |
2032 | oepos.offset - (2 * adsize)); | |
1da177e4 | 2033 | else |
4b11111a MS |
2034 | udf_update_tag(oepos.bh->b_data, |
2035 | sizeof(struct allocExtDesc)); | |
ff116fc8 | 2036 | mark_buffer_dirty_inode(oepos.bh, inode); |
1da177e4 | 2037 | } |
cb00ea35 | 2038 | } else { |
ff116fc8 | 2039 | udf_write_aext(inode, &oepos, eloc, elen, 1); |
cb00ea35 | 2040 | if (!oepos.bh) { |
1da177e4 LT |
2041 | UDF_I_LENALLOC(inode) -= adsize; |
2042 | mark_inode_dirty(inode); | |
cb00ea35 | 2043 | } else { |
ff116fc8 | 2044 | aed = (struct allocExtDesc *)oepos.bh->b_data; |
1da177e4 | 2045 | aed->lengthAllocDescs = |
4b11111a MS |
2046 | cpu_to_le32(le32_to_cpu(aed->lengthAllocDescs) - |
2047 | adsize); | |
28de7948 | 2048 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
6c79e987 | 2049 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) |
4b11111a MS |
2050 | udf_update_tag(oepos.bh->b_data, |
2051 | epos.offset - adsize); | |
1da177e4 | 2052 | else |
4b11111a MS |
2053 | udf_update_tag(oepos.bh->b_data, |
2054 | sizeof(struct allocExtDesc)); | |
ff116fc8 | 2055 | mark_buffer_dirty_inode(oepos.bh, inode); |
1da177e4 LT |
2056 | } |
2057 | } | |
647bd61a | 2058 | |
3bf25cb4 JK |
2059 | brelse(epos.bh); |
2060 | brelse(oepos.bh); | |
28de7948 | 2061 | |
1da177e4 LT |
2062 | return (elen >> 30); |
2063 | } | |
2064 | ||
4b11111a MS |
2065 | int8_t inode_bmap(struct inode *inode, sector_t block, |
2066 | struct extent_position *pos, kernel_lb_addr *eloc, | |
2067 | uint32_t *elen, sector_t *offset) | |
1da177e4 | 2068 | { |
4b11111a | 2069 | unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; |
cb00ea35 | 2070 | loff_t lbcount = 0, bcount = |
4b11111a | 2071 | (loff_t) block << blocksize_bits; |
1da177e4 LT |
2072 | int8_t etype; |
2073 | ||
cb00ea35 | 2074 | if (block < 0) { |
1da177e4 LT |
2075 | printk(KERN_ERR "udf: inode_bmap: block < 0\n"); |
2076 | return -1; | |
2077 | } | |
1da177e4 | 2078 | |
ff116fc8 JK |
2079 | pos->offset = 0; |
2080 | pos->block = UDF_I_LOCATION(inode); | |
2081 | pos->bh = NULL; | |
1da177e4 | 2082 | *elen = 0; |
1da177e4 | 2083 | |
cb00ea35 | 2084 | do { |
4b11111a MS |
2085 | etype = udf_next_aext(inode, pos, eloc, elen, 1); |
2086 | if (etype == -1) { | |
2087 | *offset = (bcount - lbcount) >> blocksize_bits; | |
1da177e4 LT |
2088 | UDF_I_LENEXTENTS(inode) = lbcount; |
2089 | return -1; | |
2090 | } | |
2091 | lbcount += *elen; | |
2092 | } while (lbcount <= bcount); | |
2093 | ||
4b11111a | 2094 | *offset = (bcount + *elen - lbcount) >> blocksize_bits; |
1da177e4 LT |
2095 | |
2096 | return etype; | |
2097 | } | |
2098 | ||
60448b1d | 2099 | long udf_block_map(struct inode *inode, sector_t block) |
1da177e4 | 2100 | { |
ff116fc8 JK |
2101 | kernel_lb_addr eloc; |
2102 | uint32_t elen; | |
60448b1d | 2103 | sector_t offset; |
28de7948 | 2104 | struct extent_position epos = {}; |
1da177e4 LT |
2105 | int ret; |
2106 | ||
2107 | lock_kernel(); | |
2108 | ||
4b11111a MS |
2109 | if (inode_bmap(inode, block, &epos, &eloc, &elen, &offset) == |
2110 | (EXT_RECORDED_ALLOCATED >> 30)) | |
60448b1d | 2111 | ret = udf_get_lb_pblock(inode->i_sb, eloc, offset); |
1da177e4 LT |
2112 | else |
2113 | ret = 0; | |
2114 | ||
2115 | unlock_kernel(); | |
3bf25cb4 | 2116 | brelse(epos.bh); |
1da177e4 LT |
2117 | |
2118 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_VARCONV)) | |
2119 | return udf_fixed_to_variable(ret); | |
2120 | else | |
2121 | return ret; | |
2122 | } |