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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 | |
22 | * 12/06/98 blf partition support in udf_iget, udf_block_map and udf_read_inode | |
23 | * 12/12/98 rewrote udf_block_map to handle next extents and descs across | |
24 | * block boundaries (which is not actually allowed) | |
25 | * 12/20/98 added support for strategy 4096 | |
26 | * 03/07/99 rewrote udf_block_map (again) | |
27 | * New funcs, inode_bmap, udf_next_aext | |
28 | * 04/19/99 Support for writing device EA's for major/minor # | |
29 | */ | |
30 | ||
31 | #include "udfdecl.h" | |
32 | #include <linux/mm.h> | |
33 | #include <linux/smp_lock.h> | |
34 | #include <linux/module.h> | |
35 | #include <linux/pagemap.h> | |
36 | #include <linux/buffer_head.h> | |
37 | #include <linux/writeback.h> | |
38 | #include <linux/slab.h> | |
39 | ||
40 | #include "udf_i.h" | |
41 | #include "udf_sb.h" | |
42 | ||
43 | MODULE_AUTHOR("Ben Fennema"); | |
44 | MODULE_DESCRIPTION("Universal Disk Format Filesystem"); | |
45 | MODULE_LICENSE("GPL"); | |
46 | ||
47 | #define EXTENT_MERGE_SIZE 5 | |
48 | ||
49 | static mode_t udf_convert_permissions(struct fileEntry *); | |
50 | static int udf_update_inode(struct inode *, int); | |
51 | static void udf_fill_inode(struct inode *, struct buffer_head *); | |
647bd61a | 52 | static int udf_alloc_i_data(struct inode *inode, size_t size); |
60448b1d | 53 | static struct buffer_head *inode_getblk(struct inode *, sector_t, int *, |
cb00ea35 | 54 | long *, int *); |
ff116fc8 | 55 | static int8_t udf_insert_aext(struct inode *, struct extent_position, |
cb00ea35 | 56 | kernel_lb_addr, uint32_t); |
1da177e4 | 57 | static void udf_split_extents(struct inode *, int *, int, int, |
cb00ea35 | 58 | kernel_long_ad[EXTENT_MERGE_SIZE], int *); |
1da177e4 | 59 | static void udf_prealloc_extents(struct inode *, int, int, |
cb00ea35 | 60 | kernel_long_ad[EXTENT_MERGE_SIZE], int *); |
1da177e4 | 61 | static void udf_merge_extents(struct inode *, |
cb00ea35 | 62 | kernel_long_ad[EXTENT_MERGE_SIZE], int *); |
1da177e4 | 63 | static void udf_update_extents(struct inode *, |
cb00ea35 CG |
64 | kernel_long_ad[EXTENT_MERGE_SIZE], int, int, |
65 | struct extent_position *); | |
1da177e4 LT |
66 | static int udf_get_block(struct inode *, sector_t, struct buffer_head *, int); |
67 | ||
68 | /* | |
69 | * udf_delete_inode | |
70 | * | |
71 | * PURPOSE | |
72 | * Clean-up before the specified inode is destroyed. | |
73 | * | |
74 | * DESCRIPTION | |
75 | * This routine is called when the kernel destroys an inode structure | |
76 | * ie. when iput() finds i_count == 0. | |
77 | * | |
78 | * HISTORY | |
79 | * July 1, 1997 - Andrew E. Mileski | |
80 | * Written, tested, and released. | |
81 | * | |
82 | * Called at the last iput() if i_nlink is zero. | |
83 | */ | |
cb00ea35 | 84 | void udf_delete_inode(struct inode *inode) |
1da177e4 | 85 | { |
fef26658 MF |
86 | truncate_inode_pages(&inode->i_data, 0); |
87 | ||
1da177e4 LT |
88 | if (is_bad_inode(inode)) |
89 | goto no_delete; | |
90 | ||
91 | inode->i_size = 0; | |
92 | udf_truncate(inode); | |
93 | lock_kernel(); | |
94 | ||
95 | udf_update_inode(inode, IS_SYNC(inode)); | |
96 | udf_free_inode(inode); | |
97 | ||
98 | unlock_kernel(); | |
99 | return; | |
28de7948 CG |
100 | |
101 | no_delete: | |
1da177e4 LT |
102 | clear_inode(inode); |
103 | } | |
104 | ||
74584ae5 JK |
105 | /* |
106 | * If we are going to release inode from memory, we discard preallocation and | |
107 | * truncate last inode extent to proper length. We could use drop_inode() but | |
108 | * it's called under inode_lock and thus we cannot mark inode dirty there. We | |
109 | * use clear_inode() but we have to make sure to write inode as it's not written | |
110 | * automatically. | |
111 | */ | |
1da177e4 LT |
112 | void udf_clear_inode(struct inode *inode) |
113 | { | |
114 | if (!(inode->i_sb->s_flags & MS_RDONLY)) { | |
115 | lock_kernel(); | |
74584ae5 | 116 | /* Discard preallocation for directories, symlinks, etc. */ |
1da177e4 | 117 | udf_discard_prealloc(inode); |
74584ae5 | 118 | udf_truncate_tail_extent(inode); |
1da177e4 | 119 | unlock_kernel(); |
74584ae5 | 120 | write_inode_now(inode, 1); |
1da177e4 | 121 | } |
1da177e4 LT |
122 | kfree(UDF_I_DATA(inode)); |
123 | UDF_I_DATA(inode) = NULL; | |
124 | } | |
125 | ||
126 | static int udf_writepage(struct page *page, struct writeback_control *wbc) | |
127 | { | |
128 | return block_write_full_page(page, udf_get_block, wbc); | |
129 | } | |
130 | ||
131 | static int udf_readpage(struct file *file, struct page *page) | |
132 | { | |
133 | return block_read_full_page(page, udf_get_block); | |
134 | } | |
135 | ||
cb00ea35 CG |
136 | static int udf_prepare_write(struct file *file, struct page *page, |
137 | unsigned from, unsigned to) | |
1da177e4 LT |
138 | { |
139 | return block_prepare_write(page, from, to, udf_get_block); | |
140 | } | |
141 | ||
142 | static sector_t udf_bmap(struct address_space *mapping, sector_t block) | |
143 | { | |
cb00ea35 | 144 | return generic_block_bmap(mapping, block, udf_get_block); |
1da177e4 LT |
145 | } |
146 | ||
f5e54d6e | 147 | const struct address_space_operations udf_aops = { |
28de7948 CG |
148 | .readpage = udf_readpage, |
149 | .writepage = udf_writepage, | |
150 | .sync_page = block_sync_page, | |
151 | .prepare_write = udf_prepare_write, | |
152 | .commit_write = generic_commit_write, | |
153 | .bmap = udf_bmap, | |
1da177e4 LT |
154 | }; |
155 | ||
cb00ea35 | 156 | void udf_expand_file_adinicb(struct inode *inode, int newsize, int *err) |
1da177e4 LT |
157 | { |
158 | struct page *page; | |
159 | char *kaddr; | |
160 | struct writeback_control udf_wbc = { | |
161 | .sync_mode = WB_SYNC_NONE, | |
162 | .nr_to_write = 1, | |
163 | }; | |
164 | ||
165 | /* from now on we have normal address_space methods */ | |
166 | inode->i_data.a_ops = &udf_aops; | |
167 | ||
cb00ea35 | 168 | if (!UDF_I_LENALLOC(inode)) { |
1da177e4 LT |
169 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) |
170 | UDF_I_ALLOCTYPE(inode) = ICBTAG_FLAG_AD_SHORT; | |
171 | else | |
172 | UDF_I_ALLOCTYPE(inode) = ICBTAG_FLAG_AD_LONG; | |
173 | mark_inode_dirty(inode); | |
174 | return; | |
175 | } | |
176 | ||
177 | page = grab_cache_page(inode->i_mapping, 0); | |
cd7619d6 MM |
178 | BUG_ON(!PageLocked(page)); |
179 | ||
cb00ea35 | 180 | if (!PageUptodate(page)) { |
1da177e4 LT |
181 | kaddr = kmap(page); |
182 | memset(kaddr + UDF_I_LENALLOC(inode), 0x00, | |
cb00ea35 | 183 | PAGE_CACHE_SIZE - UDF_I_LENALLOC(inode)); |
1da177e4 | 184 | memcpy(kaddr, UDF_I_DATA(inode) + UDF_I_LENEATTR(inode), |
cb00ea35 | 185 | UDF_I_LENALLOC(inode)); |
1da177e4 LT |
186 | flush_dcache_page(page); |
187 | SetPageUptodate(page); | |
188 | kunmap(page); | |
189 | } | |
190 | memset(UDF_I_DATA(inode) + UDF_I_LENEATTR(inode), 0x00, | |
cb00ea35 | 191 | UDF_I_LENALLOC(inode)); |
1da177e4 LT |
192 | UDF_I_LENALLOC(inode) = 0; |
193 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) | |
194 | UDF_I_ALLOCTYPE(inode) = ICBTAG_FLAG_AD_SHORT; | |
195 | else | |
196 | UDF_I_ALLOCTYPE(inode) = ICBTAG_FLAG_AD_LONG; | |
197 | ||
198 | inode->i_data.a_ops->writepage(page, &udf_wbc); | |
199 | page_cache_release(page); | |
200 | ||
201 | mark_inode_dirty(inode); | |
202 | } | |
203 | ||
cb00ea35 CG |
204 | struct buffer_head *udf_expand_dir_adinicb(struct inode *inode, int *block, |
205 | int *err) | |
1da177e4 LT |
206 | { |
207 | int newblock; | |
ff116fc8 JK |
208 | struct buffer_head *dbh = NULL; |
209 | kernel_lb_addr eloc; | |
210 | uint32_t elen; | |
1da177e4 | 211 | uint8_t alloctype; |
ff116fc8 | 212 | struct extent_position epos; |
1da177e4 LT |
213 | |
214 | struct udf_fileident_bh sfibh, dfibh; | |
215 | loff_t f_pos = udf_ext0_offset(inode) >> 2; | |
216 | int size = (udf_ext0_offset(inode) + inode->i_size) >> 2; | |
217 | struct fileIdentDesc cfi, *sfi, *dfi; | |
218 | ||
219 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) | |
220 | alloctype = ICBTAG_FLAG_AD_SHORT; | |
221 | else | |
222 | alloctype = ICBTAG_FLAG_AD_LONG; | |
223 | ||
cb00ea35 | 224 | if (!inode->i_size) { |
1da177e4 LT |
225 | UDF_I_ALLOCTYPE(inode) = alloctype; |
226 | mark_inode_dirty(inode); | |
227 | return NULL; | |
228 | } | |
229 | ||
230 | /* alloc block, and copy data to it */ | |
231 | *block = udf_new_block(inode->i_sb, inode, | |
cb00ea35 CG |
232 | UDF_I_LOCATION(inode).partitionReferenceNum, |
233 | UDF_I_LOCATION(inode).logicalBlockNum, err); | |
1da177e4 LT |
234 | if (!(*block)) |
235 | return NULL; | |
236 | newblock = udf_get_pblock(inode->i_sb, *block, | |
28de7948 | 237 | UDF_I_LOCATION(inode).partitionReferenceNum, 0); |
1da177e4 LT |
238 | if (!newblock) |
239 | return NULL; | |
240 | dbh = udf_tgetblk(inode->i_sb, newblock); | |
241 | if (!dbh) | |
242 | return NULL; | |
243 | lock_buffer(dbh); | |
244 | memset(dbh->b_data, 0x00, inode->i_sb->s_blocksize); | |
245 | set_buffer_uptodate(dbh); | |
246 | unlock_buffer(dbh); | |
247 | mark_buffer_dirty_inode(dbh, inode); | |
248 | ||
28de7948 | 249 | sfibh.soffset = sfibh.eoffset = (f_pos & ((inode->i_sb->s_blocksize - 1) >> 2)) << 2; |
ff116fc8 | 250 | sfibh.sbh = sfibh.ebh = NULL; |
1da177e4 LT |
251 | dfibh.soffset = dfibh.eoffset = 0; |
252 | dfibh.sbh = dfibh.ebh = dbh; | |
cb00ea35 | 253 | while ((f_pos < size)) { |
1da177e4 | 254 | UDF_I_ALLOCTYPE(inode) = ICBTAG_FLAG_AD_IN_ICB; |
28de7948 | 255 | sfi = udf_fileident_read(inode, &f_pos, &sfibh, &cfi, NULL, NULL, NULL, NULL); |
cb00ea35 | 256 | if (!sfi) { |
3bf25cb4 | 257 | brelse(dbh); |
1da177e4 LT |
258 | return NULL; |
259 | } | |
260 | UDF_I_ALLOCTYPE(inode) = alloctype; | |
261 | sfi->descTag.tagLocation = cpu_to_le32(*block); | |
262 | dfibh.soffset = dfibh.eoffset; | |
263 | dfibh.eoffset += (sfibh.eoffset - sfibh.soffset); | |
264 | dfi = (struct fileIdentDesc *)(dbh->b_data + dfibh.soffset); | |
265 | if (udf_write_fi(inode, sfi, dfi, &dfibh, sfi->impUse, | |
28de7948 | 266 | sfi->fileIdent + le16_to_cpu(sfi->lengthOfImpUse))) { |
1da177e4 | 267 | UDF_I_ALLOCTYPE(inode) = ICBTAG_FLAG_AD_IN_ICB; |
3bf25cb4 | 268 | brelse(dbh); |
1da177e4 LT |
269 | return NULL; |
270 | } | |
271 | } | |
272 | mark_buffer_dirty_inode(dbh, inode); | |
273 | ||
28de7948 | 274 | memset(UDF_I_DATA(inode) + UDF_I_LENEATTR(inode), 0, UDF_I_LENALLOC(inode)); |
1da177e4 | 275 | UDF_I_LENALLOC(inode) = 0; |
1da177e4 | 276 | eloc.logicalBlockNum = *block; |
28de7948 | 277 | eloc.partitionReferenceNum = UDF_I_LOCATION(inode).partitionReferenceNum; |
1da177e4 LT |
278 | elen = inode->i_size; |
279 | UDF_I_LENEXTENTS(inode) = elen; | |
ff116fc8 JK |
280 | epos.bh = NULL; |
281 | epos.block = UDF_I_LOCATION(inode); | |
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; | |
296 | unsigned long phys; | |
297 | ||
cb00ea35 | 298 | if (!create) { |
1da177e4 LT |
299 | phys = udf_block_map(inode, block); |
300 | if (phys) | |
301 | map_bh(bh_result, inode->i_sb, phys); | |
302 | return 0; | |
303 | } | |
304 | ||
305 | err = -EIO; | |
306 | new = 0; | |
307 | bh = NULL; | |
308 | ||
309 | lock_kernel(); | |
310 | ||
311 | if (block < 0) | |
312 | goto abort_negative; | |
313 | ||
cb00ea35 CG |
314 | if (block == UDF_I_NEXT_ALLOC_BLOCK(inode) + 1) { |
315 | UDF_I_NEXT_ALLOC_BLOCK(inode)++; | |
316 | UDF_I_NEXT_ALLOC_GOAL(inode)++; | |
1da177e4 LT |
317 | } |
318 | ||
319 | err = 0; | |
320 | ||
321 | bh = inode_getblk(inode, block, &err, &phys, &new); | |
2c2111c2 | 322 | BUG_ON(bh); |
1da177e4 LT |
323 | if (err) |
324 | goto abort; | |
2c2111c2 | 325 | BUG_ON(!phys); |
1da177e4 LT |
326 | |
327 | if (new) | |
328 | set_buffer_new(bh_result); | |
329 | map_bh(bh_result, inode->i_sb, phys); | |
28de7948 CG |
330 | |
331 | abort: | |
1da177e4 LT |
332 | unlock_kernel(); |
333 | return err; | |
334 | ||
28de7948 | 335 | abort_negative: |
1da177e4 LT |
336 | udf_warning(inode->i_sb, "udf_get_block", "block < 0"); |
337 | goto abort; | |
338 | } | |
339 | ||
cb00ea35 CG |
340 | static struct buffer_head *udf_getblk(struct inode *inode, long block, |
341 | int create, int *err) | |
1da177e4 | 342 | { |
28de7948 | 343 | struct buffer_head *bh; |
1da177e4 LT |
344 | struct buffer_head dummy; |
345 | ||
346 | dummy.b_state = 0; | |
347 | dummy.b_blocknr = -1000; | |
348 | *err = udf_get_block(inode, block, &dummy, create); | |
cb00ea35 | 349 | if (!*err && buffer_mapped(&dummy)) { |
1da177e4 | 350 | bh = sb_getblk(inode->i_sb, dummy.b_blocknr); |
cb00ea35 | 351 | if (buffer_new(&dummy)) { |
1da177e4 LT |
352 | lock_buffer(bh); |
353 | memset(bh->b_data, 0x00, inode->i_sb->s_blocksize); | |
354 | set_buffer_uptodate(bh); | |
355 | unlock_buffer(bh); | |
356 | mark_buffer_dirty_inode(bh, inode); | |
357 | } | |
358 | return bh; | |
359 | } | |
28de7948 | 360 | |
1da177e4 LT |
361 | return NULL; |
362 | } | |
363 | ||
31170b6a JK |
364 | /* Extend the file by 'blocks' blocks, return the number of extents added */ |
365 | int udf_extend_file(struct inode *inode, struct extent_position *last_pos, | |
cb00ea35 | 366 | kernel_long_ad * last_ext, sector_t blocks) |
31170b6a JK |
367 | { |
368 | sector_t add; | |
369 | int count = 0, fake = !(last_ext->extLength & UDF_EXTENT_LENGTH_MASK); | |
370 | struct super_block *sb = inode->i_sb; | |
28de7948 | 371 | kernel_lb_addr prealloc_loc = {}; |
31170b6a JK |
372 | int prealloc_len = 0; |
373 | ||
374 | /* The previous extent is fake and we should not extend by anything | |
375 | * - there's nothing to do... */ | |
376 | if (!blocks && fake) | |
377 | return 0; | |
28de7948 | 378 | |
31170b6a JK |
379 | /* Round the last extent up to a multiple of block size */ |
380 | if (last_ext->extLength & (sb->s_blocksize - 1)) { | |
381 | last_ext->extLength = | |
28de7948 CG |
382 | (last_ext->extLength & UDF_EXTENT_FLAG_MASK) | |
383 | (((last_ext->extLength & UDF_EXTENT_LENGTH_MASK) + | |
384 | sb->s_blocksize - 1) & ~(sb->s_blocksize - 1)); | |
31170b6a | 385 | UDF_I_LENEXTENTS(inode) = |
28de7948 CG |
386 | (UDF_I_LENEXTENTS(inode) + sb->s_blocksize - 1) & |
387 | ~(sb->s_blocksize - 1); | |
31170b6a | 388 | } |
28de7948 | 389 | |
31170b6a | 390 | /* Last extent are just preallocated blocks? */ |
28de7948 | 391 | if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) == EXT_NOT_RECORDED_ALLOCATED) { |
31170b6a JK |
392 | /* Save the extent so that we can reattach it to the end */ |
393 | prealloc_loc = last_ext->extLocation; | |
394 | prealloc_len = last_ext->extLength; | |
395 | /* Mark the extent as a hole */ | |
396 | last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | | |
28de7948 | 397 | (last_ext->extLength & UDF_EXTENT_LENGTH_MASK); |
31170b6a | 398 | last_ext->extLocation.logicalBlockNum = 0; |
28de7948 | 399 | last_ext->extLocation.partitionReferenceNum = 0; |
31170b6a | 400 | } |
28de7948 | 401 | |
31170b6a | 402 | /* Can we merge with the previous extent? */ |
28de7948 CG |
403 | if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) == EXT_NOT_RECORDED_NOT_ALLOCATED) { |
404 | add = ((1 << 30) - sb->s_blocksize - (last_ext->extLength & | |
405 | UDF_EXTENT_LENGTH_MASK)) >> 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++; |
28de7948 CG |
416 | } else { |
417 | udf_write_aext(inode, last_pos, last_ext->extLocation, last_ext->extLength, 1); | |
418 | } | |
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; | |
28de7948 CG |
426 | last_ext->extLocation.partitionReferenceNum = 0; |
427 | add = (1 << (30-sb->s_blocksize_bits)) - 1; | |
428 | last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | (add << sb->s_blocksize_bits); | |
429 | ||
31170b6a JK |
430 | /* Create enough extents to cover the whole hole */ |
431 | while (blocks > add) { | |
432 | blocks -= add; | |
433 | if (udf_add_aext(inode, last_pos, last_ext->extLocation, | |
cb00ea35 | 434 | last_ext->extLength, 1) == -1) |
31170b6a JK |
435 | return -1; |
436 | count++; | |
437 | } | |
438 | if (blocks) { | |
439 | last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | | |
28de7948 | 440 | (blocks << sb->s_blocksize_bits); |
31170b6a | 441 | if (udf_add_aext(inode, last_pos, last_ext->extLocation, |
cb00ea35 | 442 | last_ext->extLength, 1) == -1) |
31170b6a JK |
443 | return -1; |
444 | count++; | |
445 | } | |
28de7948 CG |
446 | |
447 | out: | |
31170b6a JK |
448 | /* Do we have some preallocated blocks saved? */ |
449 | if (prealloc_len) { | |
28de7948 | 450 | if (udf_add_aext(inode, last_pos, prealloc_loc, prealloc_len, 1) == -1) |
31170b6a JK |
451 | return -1; |
452 | last_ext->extLocation = prealloc_loc; | |
453 | last_ext->extLength = prealloc_len; | |
454 | count++; | |
455 | } | |
28de7948 | 456 | |
31170b6a JK |
457 | /* last_pos should point to the last written extent... */ |
458 | if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_SHORT) | |
459 | last_pos->offset -= sizeof(short_ad); | |
460 | else if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_LONG) | |
461 | last_pos->offset -= sizeof(long_ad); | |
462 | else | |
463 | return -1; | |
28de7948 | 464 | |
31170b6a JK |
465 | return count; |
466 | } | |
467 | ||
cb00ea35 CG |
468 | static struct buffer_head *inode_getblk(struct inode *inode, sector_t block, |
469 | int *err, long *phys, int *new) | |
1da177e4 | 470 | { |
31170b6a | 471 | static sector_t last_block; |
ff116fc8 | 472 | struct buffer_head *result = NULL; |
1da177e4 | 473 | kernel_long_ad laarr[EXTENT_MERGE_SIZE]; |
ff116fc8 | 474 | struct extent_position prev_epos, cur_epos, next_epos; |
1da177e4 | 475 | int count = 0, startnum = 0, endnum = 0; |
85d71244 JK |
476 | uint32_t elen = 0, tmpelen; |
477 | kernel_lb_addr eloc, tmpeloc; | |
1da177e4 | 478 | int c = 1; |
60448b1d JK |
479 | loff_t lbcount = 0, b_off = 0; |
480 | uint32_t newblocknum, newblock; | |
481 | sector_t offset = 0; | |
1da177e4 LT |
482 | int8_t etype; |
483 | int goal = 0, pgoal = UDF_I_LOCATION(inode).logicalBlockNum; | |
31170b6a | 484 | int lastblock = 0; |
1da177e4 | 485 | |
ff116fc8 JK |
486 | prev_epos.offset = udf_file_entry_alloc_offset(inode); |
487 | prev_epos.block = UDF_I_LOCATION(inode); | |
488 | prev_epos.bh = NULL; | |
489 | cur_epos = next_epos = prev_epos; | |
28de7948 | 490 | b_off = (loff_t)block << inode->i_sb->s_blocksize_bits; |
1da177e4 LT |
491 | |
492 | /* find the extent which contains the block we are looking for. | |
cb00ea35 CG |
493 | alternate between laarr[0] and laarr[1] for locations of the |
494 | current extent, and the previous extent */ | |
495 | do { | |
496 | if (prev_epos.bh != cur_epos.bh) { | |
3bf25cb4 JK |
497 | brelse(prev_epos.bh); |
498 | get_bh(cur_epos.bh); | |
ff116fc8 | 499 | prev_epos.bh = cur_epos.bh; |
1da177e4 | 500 | } |
cb00ea35 | 501 | if (cur_epos.bh != next_epos.bh) { |
3bf25cb4 JK |
502 | brelse(cur_epos.bh); |
503 | get_bh(next_epos.bh); | |
ff116fc8 | 504 | cur_epos.bh = next_epos.bh; |
1da177e4 LT |
505 | } |
506 | ||
507 | lbcount += elen; | |
508 | ||
ff116fc8 JK |
509 | prev_epos.block = cur_epos.block; |
510 | cur_epos.block = next_epos.block; | |
1da177e4 | 511 | |
ff116fc8 JK |
512 | prev_epos.offset = cur_epos.offset; |
513 | cur_epos.offset = next_epos.offset; | |
1da177e4 | 514 | |
28de7948 | 515 | if ((etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 1)) == -1) |
1da177e4 LT |
516 | break; |
517 | ||
518 | c = !c; | |
519 | ||
520 | laarr[c].extLength = (etype << 30) | elen; | |
521 | laarr[c].extLocation = eloc; | |
522 | ||
523 | if (etype != (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) | |
524 | pgoal = eloc.logicalBlockNum + | |
28de7948 CG |
525 | ((elen + inode->i_sb->s_blocksize - 1) >> |
526 | inode->i_sb->s_blocksize_bits); | |
1da177e4 | 527 | |
cb00ea35 | 528 | count++; |
1da177e4 LT |
529 | } while (lbcount + elen <= b_off); |
530 | ||
531 | b_off -= lbcount; | |
532 | offset = b_off >> inode->i_sb->s_blocksize_bits; | |
85d71244 JK |
533 | /* |
534 | * Move prev_epos and cur_epos into indirect extent if we are at | |
535 | * the pointer to it | |
536 | */ | |
537 | udf_next_aext(inode, &prev_epos, &tmpeloc, &tmpelen, 0); | |
538 | udf_next_aext(inode, &cur_epos, &tmpeloc, &tmpelen, 0); | |
1da177e4 LT |
539 | |
540 | /* if the extent is allocated and recorded, return the block | |
cb00ea35 | 541 | if the extent is not a multiple of the blocksize, round up */ |
1da177e4 | 542 | |
cb00ea35 CG |
543 | if (etype == (EXT_RECORDED_ALLOCATED >> 30)) { |
544 | if (elen & (inode->i_sb->s_blocksize - 1)) { | |
1da177e4 | 545 | elen = EXT_RECORDED_ALLOCATED | |
28de7948 CG |
546 | ((elen + inode->i_sb->s_blocksize - 1) & |
547 | ~(inode->i_sb->s_blocksize - 1)); | |
ff116fc8 | 548 | etype = udf_write_aext(inode, &cur_epos, eloc, elen, 1); |
1da177e4 | 549 | } |
3bf25cb4 JK |
550 | brelse(prev_epos.bh); |
551 | brelse(cur_epos.bh); | |
552 | brelse(next_epos.bh); | |
1da177e4 LT |
553 | newblock = udf_get_lb_pblock(inode->i_sb, eloc, offset); |
554 | *phys = newblock; | |
555 | return NULL; | |
556 | } | |
557 | ||
31170b6a JK |
558 | last_block = block; |
559 | /* Are we beyond EOF? */ | |
cb00ea35 | 560 | if (etype == -1) { |
31170b6a JK |
561 | int ret; |
562 | ||
563 | if (count) { | |
564 | if (c) | |
565 | laarr[0] = laarr[1]; | |
566 | startnum = 1; | |
cb00ea35 | 567 | } else { |
31170b6a | 568 | /* Create a fake extent when there's not one */ |
28de7948 | 569 | memset(&laarr[0].extLocation, 0x00, sizeof(kernel_lb_addr)); |
31170b6a JK |
570 | laarr[0].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED; |
571 | /* Will udf_extend_file() create real extent from a fake one? */ | |
572 | startnum = (offset > 0); | |
573 | } | |
574 | /* Create extents for the hole between EOF and offset */ | |
575 | ret = udf_extend_file(inode, &prev_epos, laarr, offset); | |
576 | if (ret == -1) { | |
577 | brelse(prev_epos.bh); | |
578 | brelse(cur_epos.bh); | |
579 | brelse(next_epos.bh); | |
580 | /* We don't really know the error here so we just make | |
581 | * something up */ | |
582 | *err = -ENOSPC; | |
583 | return NULL; | |
584 | } | |
585 | c = 0; | |
586 | offset = 0; | |
587 | count += ret; | |
588 | /* We are not covered by a preallocated extent? */ | |
28de7948 | 589 | if ((laarr[0].extLength & UDF_EXTENT_FLAG_MASK) != EXT_NOT_RECORDED_ALLOCATED) { |
31170b6a JK |
590 | /* Is there any real extent? - otherwise we overwrite |
591 | * the fake one... */ | |
592 | if (count) | |
593 | c = !c; | |
594 | laarr[c].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | | |
28de7948 CG |
595 | inode->i_sb->s_blocksize; |
596 | memset(&laarr[c].extLocation, 0x00, sizeof(kernel_lb_addr)); | |
cb00ea35 CG |
597 | count++; |
598 | endnum++; | |
31170b6a | 599 | } |
cb00ea35 | 600 | endnum = c + 1; |
1da177e4 | 601 | lastblock = 1; |
cb00ea35 | 602 | } else { |
1da177e4 LT |
603 | endnum = startnum = ((count > 2) ? 2 : count); |
604 | ||
31170b6a | 605 | /* if the current extent is in position 0, swap it with the previous */ |
cb00ea35 | 606 | if (!c && count != 1) { |
31170b6a JK |
607 | laarr[2] = laarr[0]; |
608 | laarr[0] = laarr[1]; | |
609 | laarr[1] = laarr[2]; | |
610 | c = 1; | |
611 | } | |
1da177e4 | 612 | |
31170b6a | 613 | /* if the current block is located in an extent, read the next extent */ |
28de7948 | 614 | if ((etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 0)) != -1) { |
cb00ea35 CG |
615 | laarr[c + 1].extLength = (etype << 30) | elen; |
616 | laarr[c + 1].extLocation = eloc; | |
617 | count++; | |
618 | startnum++; | |
619 | endnum++; | |
620 | } else { | |
1da177e4 | 621 | lastblock = 1; |
31170b6a | 622 | } |
1da177e4 | 623 | } |
1da177e4 LT |
624 | |
625 | /* if the current extent is not recorded but allocated, get the | |
28de7948 CG |
626 | * block in the extent corresponding to the requested block */ |
627 | if ((laarr[c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30)) { | |
1da177e4 | 628 | newblocknum = laarr[c].extLocation.logicalBlockNum + offset; |
28de7948 | 629 | } else { /* otherwise, allocate a new block */ |
1da177e4 LT |
630 | if (UDF_I_NEXT_ALLOC_BLOCK(inode) == block) |
631 | goal = UDF_I_NEXT_ALLOC_GOAL(inode); | |
632 | ||
cb00ea35 | 633 | if (!goal) { |
1da177e4 | 634 | if (!(goal = pgoal)) |
28de7948 | 635 | goal = UDF_I_LOCATION(inode).logicalBlockNum + 1; |
1da177e4 LT |
636 | } |
637 | ||
638 | if (!(newblocknum = udf_new_block(inode->i_sb, inode, | |
28de7948 CG |
639 | UDF_I_LOCATION(inode).partitionReferenceNum, |
640 | goal, err))) { | |
3bf25cb4 | 641 | brelse(prev_epos.bh); |
1da177e4 LT |
642 | *err = -ENOSPC; |
643 | return NULL; | |
644 | } | |
645 | UDF_I_LENEXTENTS(inode) += inode->i_sb->s_blocksize; | |
646 | } | |
647 | ||
648 | /* if the extent the requsted block is located in contains multiple blocks, | |
28de7948 CG |
649 | * split the extent into at most three extents. blocks prior to requested |
650 | * block, requested block, and blocks after requested block */ | |
1da177e4 LT |
651 | udf_split_extents(inode, &c, offset, newblocknum, laarr, &endnum); |
652 | ||
653 | #ifdef UDF_PREALLOCATE | |
654 | /* preallocate blocks */ | |
655 | udf_prealloc_extents(inode, c, lastblock, laarr, &endnum); | |
656 | #endif | |
657 | ||
658 | /* merge any continuous blocks in laarr */ | |
659 | udf_merge_extents(inode, laarr, &endnum); | |
660 | ||
661 | /* write back the new extents, inserting new extents if the new number | |
28de7948 CG |
662 | * of extents is greater than the old number, and deleting extents if |
663 | * the new number of extents is less than the old number */ | |
ff116fc8 | 664 | udf_update_extents(inode, laarr, startnum, endnum, &prev_epos); |
1da177e4 | 665 | |
3bf25cb4 | 666 | brelse(prev_epos.bh); |
1da177e4 LT |
667 | |
668 | if (!(newblock = udf_get_pblock(inode->i_sb, newblocknum, | |
28de7948 | 669 | UDF_I_LOCATION(inode).partitionReferenceNum, 0))) { |
1da177e4 LT |
670 | return NULL; |
671 | } | |
672 | *phys = newblock; | |
673 | *err = 0; | |
674 | *new = 1; | |
675 | UDF_I_NEXT_ALLOC_BLOCK(inode) = block; | |
676 | UDF_I_NEXT_ALLOC_GOAL(inode) = newblocknum; | |
677 | inode->i_ctime = current_fs_time(inode->i_sb); | |
678 | ||
679 | if (IS_SYNC(inode)) | |
680 | udf_sync_inode(inode); | |
681 | else | |
682 | mark_inode_dirty(inode); | |
28de7948 | 683 | |
1da177e4 LT |
684 | return result; |
685 | } | |
686 | ||
cb00ea35 CG |
687 | static void udf_split_extents(struct inode *inode, int *c, int offset, |
688 | int newblocknum, | |
689 | kernel_long_ad laarr[EXTENT_MERGE_SIZE], | |
690 | int *endnum) | |
1da177e4 LT |
691 | { |
692 | if ((laarr[*c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30) || | |
28de7948 | 693 | (laarr[*c].extLength >> 30) == (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) { |
1da177e4 LT |
694 | int curr = *c; |
695 | int blen = ((laarr[curr].extLength & UDF_EXTENT_LENGTH_MASK) + | |
28de7948 | 696 | inode->i_sb->s_blocksize - 1) >> inode->i_sb->s_blocksize_bits; |
1da177e4 LT |
697 | int8_t etype = (laarr[curr].extLength >> 30); |
698 | ||
28de7948 CG |
699 | if (blen == 1) { |
700 | ; | |
701 | } else if (!offset || blen == offset + 1) { | |
cb00ea35 CG |
702 | laarr[curr + 2] = laarr[curr + 1]; |
703 | laarr[curr + 1] = laarr[curr]; | |
704 | } else { | |
705 | laarr[curr + 3] = laarr[curr + 1]; | |
706 | laarr[curr + 2] = laarr[curr + 1] = laarr[curr]; | |
707 | } | |
708 | ||
709 | if (offset) { | |
710 | if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30)) { | |
28de7948 CG |
711 | udf_free_blocks(inode->i_sb, inode, laarr[curr].extLocation, 0, offset); |
712 | laarr[curr].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | | |
713 | (offset << inode->i_sb->s_blocksize_bits); | |
1da177e4 | 714 | laarr[curr].extLocation.logicalBlockNum = 0; |
28de7948 CG |
715 | laarr[curr].extLocation.partitionReferenceNum = 0; |
716 | } else { | |
1da177e4 | 717 | laarr[curr].extLength = (etype << 30) | |
28de7948 CG |
718 | (offset << inode->i_sb->s_blocksize_bits); |
719 | } | |
cb00ea35 CG |
720 | curr++; |
721 | (*c)++; | |
722 | (*endnum)++; | |
1da177e4 | 723 | } |
647bd61a | 724 | |
1da177e4 LT |
725 | laarr[curr].extLocation.logicalBlockNum = newblocknum; |
726 | if (etype == (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) | |
727 | laarr[curr].extLocation.partitionReferenceNum = | |
28de7948 | 728 | UDF_I_LOCATION(inode).partitionReferenceNum; |
1da177e4 | 729 | laarr[curr].extLength = EXT_RECORDED_ALLOCATED | |
28de7948 | 730 | inode->i_sb->s_blocksize; |
cb00ea35 | 731 | curr++; |
1da177e4 | 732 | |
cb00ea35 | 733 | if (blen != offset + 1) { |
1da177e4 | 734 | if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30)) |
28de7948 CG |
735 | laarr[curr].extLocation.logicalBlockNum += (offset + 1); |
736 | laarr[curr].extLength = (etype << 30) | | |
737 | ((blen - (offset + 1)) << inode->i_sb->s_blocksize_bits); | |
cb00ea35 CG |
738 | curr++; |
739 | (*endnum)++; | |
1da177e4 LT |
740 | } |
741 | } | |
742 | } | |
743 | ||
744 | static void udf_prealloc_extents(struct inode *inode, int c, int lastblock, | |
cb00ea35 CG |
745 | kernel_long_ad laarr[EXTENT_MERGE_SIZE], |
746 | int *endnum) | |
1da177e4 LT |
747 | { |
748 | int start, length = 0, currlength = 0, i; | |
749 | ||
cb00ea35 | 750 | if (*endnum >= (c + 1)) { |
1da177e4 LT |
751 | if (!lastblock) |
752 | return; | |
753 | else | |
754 | start = c; | |
cb00ea35 | 755 | } else { |
28de7948 | 756 | if ((laarr[c + 1].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30)) { |
cb00ea35 | 757 | start = c + 1; |
28de7948 CG |
758 | length = currlength = (((laarr[c + 1].extLength & UDF_EXTENT_LENGTH_MASK) + |
759 | inode->i_sb->s_blocksize - 1) >> inode->i_sb->s_blocksize_bits); | |
760 | } else { | |
1da177e4 | 761 | start = c; |
28de7948 | 762 | } |
1da177e4 LT |
763 | } |
764 | ||
cb00ea35 CG |
765 | for (i = start + 1; i <= *endnum; i++) { |
766 | if (i == *endnum) { | |
1da177e4 LT |
767 | if (lastblock) |
768 | length += UDF_DEFAULT_PREALLOC_BLOCKS; | |
28de7948 CG |
769 | } else if ((laarr[i].extLength >> 30) == (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) { |
770 | length += (((laarr[i].extLength & UDF_EXTENT_LENGTH_MASK) + | |
771 | inode->i_sb->s_blocksize - 1) >> inode->i_sb->s_blocksize_bits); | |
772 | } else { | |
1da177e4 | 773 | break; |
28de7948 | 774 | } |
1da177e4 LT |
775 | } |
776 | ||
cb00ea35 | 777 | if (length) { |
1da177e4 | 778 | int next = laarr[start].extLocation.logicalBlockNum + |
28de7948 CG |
779 | (((laarr[start].extLength & UDF_EXTENT_LENGTH_MASK) + |
780 | inode->i_sb->s_blocksize - 1) >> inode->i_sb->s_blocksize_bits); | |
1da177e4 | 781 | int numalloc = udf_prealloc_blocks(inode->i_sb, inode, |
28de7948 CG |
782 | laarr[start].extLocation.partitionReferenceNum, |
783 | next, (UDF_DEFAULT_PREALLOC_BLOCKS > length ? length : | |
784 | UDF_DEFAULT_PREALLOC_BLOCKS) - currlength); | |
785 | if (numalloc) { | |
786 | if (start == (c + 1)) { | |
1da177e4 | 787 | laarr[start].extLength += |
28de7948 CG |
788 | (numalloc << inode->i_sb->s_blocksize_bits); |
789 | } else { | |
cb00ea35 CG |
790 | memmove(&laarr[c + 2], &laarr[c + 1], |
791 | sizeof(long_ad) * (*endnum - (c + 1))); | |
792 | (*endnum)++; | |
793 | laarr[c + 1].extLocation.logicalBlockNum = next; | |
794 | laarr[c + 1].extLocation.partitionReferenceNum = | |
28de7948 CG |
795 | laarr[c].extLocation.partitionReferenceNum; |
796 | laarr[c + 1].extLength = EXT_NOT_RECORDED_ALLOCATED | | |
797 | (numalloc << inode->i_sb->s_blocksize_bits); | |
cb00ea35 | 798 | start = c + 1; |
1da177e4 LT |
799 | } |
800 | ||
cb00ea35 | 801 | for (i = start + 1; numalloc && i < *endnum; i++) { |
28de7948 CG |
802 | int elen = ((laarr[i].extLength & UDF_EXTENT_LENGTH_MASK) + |
803 | inode->i_sb->s_blocksize - 1) >> inode->i_sb->s_blocksize_bits; | |
1da177e4 | 804 | |
cb00ea35 | 805 | if (elen > numalloc) { |
1da177e4 | 806 | laarr[i].extLength -= |
28de7948 | 807 | (numalloc << inode->i_sb->s_blocksize_bits); |
1da177e4 | 808 | numalloc = 0; |
cb00ea35 | 809 | } else { |
1da177e4 | 810 | numalloc -= elen; |
cb00ea35 | 811 | if (*endnum > (i + 1)) |
28de7948 CG |
812 | memmove(&laarr[i], &laarr[i + 1], |
813 | sizeof(long_ad) * (*endnum - (i + 1))); | |
cb00ea35 CG |
814 | i--; |
815 | (*endnum)--; | |
1da177e4 LT |
816 | } |
817 | } | |
28de7948 | 818 | UDF_I_LENEXTENTS(inode) += numalloc << inode->i_sb->s_blocksize_bits; |
1da177e4 LT |
819 | } |
820 | } | |
821 | } | |
822 | ||
823 | static void udf_merge_extents(struct inode *inode, | |
cb00ea35 CG |
824 | kernel_long_ad laarr[EXTENT_MERGE_SIZE], |
825 | int *endnum) | |
1da177e4 LT |
826 | { |
827 | int i; | |
828 | ||
cb00ea35 | 829 | for (i = 0; i < (*endnum - 1); i++) { |
28de7948 CG |
830 | if ((laarr[i].extLength >> 30) == (laarr[i + 1].extLength >> 30)) { |
831 | if (((laarr[i].extLength >> 30) == (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) || | |
832 | ((laarr[i + 1].extLocation.logicalBlockNum - laarr[i].extLocation.logicalBlockNum) == | |
cb00ea35 | 833 | (((laarr[i].extLength & UDF_EXTENT_LENGTH_MASK) + |
28de7948 CG |
834 | inode->i_sb->s_blocksize - 1) >> inode->i_sb->s_blocksize_bits))) { |
835 | if (((laarr[i].extLength & UDF_EXTENT_LENGTH_MASK) + | |
836 | (laarr[i + 1].extLength & UDF_EXTENT_LENGTH_MASK) + | |
837 | inode->i_sb->s_blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) { | |
838 | laarr[i + 1].extLength = (laarr[i + 1].extLength - | |
839 | (laarr[i].extLength & UDF_EXTENT_LENGTH_MASK) + | |
840 | UDF_EXTENT_LENGTH_MASK) & ~(inode->i_sb->s_blocksize - 1); | |
841 | laarr[i].extLength = (laarr[i].extLength & UDF_EXTENT_FLAG_MASK) + | |
842 | (UDF_EXTENT_LENGTH_MASK + 1) - inode->i_sb->s_blocksize; | |
843 | laarr[i + 1].extLocation.logicalBlockNum = | |
844 | laarr[i].extLocation.logicalBlockNum + | |
845 | ((laarr[i].extLength & UDF_EXTENT_LENGTH_MASK) >> | |
846 | inode->i_sb->s_blocksize_bits); | |
cb00ea35 | 847 | } else { |
28de7948 CG |
848 | laarr[i].extLength = laarr[i + 1].extLength + |
849 | (((laarr[i].extLength & UDF_EXTENT_LENGTH_MASK) + | |
850 | inode->i_sb->s_blocksize - 1) & ~(inode->i_sb->s_blocksize - 1)); | |
cb00ea35 | 851 | if (*endnum > (i + 2)) |
28de7948 CG |
852 | memmove(&laarr[i + 1], &laarr[i + 2], |
853 | sizeof(long_ad) * (*endnum - (i + 2))); | |
cb00ea35 CG |
854 | i--; |
855 | (*endnum)--; | |
1da177e4 LT |
856 | } |
857 | } | |
28de7948 CG |
858 | } else if (((laarr[i].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30)) && |
859 | ((laarr[i + 1].extLength >> 30) == (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))) { | |
860 | udf_free_blocks(inode->i_sb, inode, laarr[i].extLocation, 0, | |
861 | ((laarr[i].extLength & UDF_EXTENT_LENGTH_MASK) + | |
862 | inode->i_sb->s_blocksize - 1) >> inode->i_sb->s_blocksize_bits); | |
1da177e4 LT |
863 | laarr[i].extLocation.logicalBlockNum = 0; |
864 | laarr[i].extLocation.partitionReferenceNum = 0; | |
865 | ||
866 | if (((laarr[i].extLength & UDF_EXTENT_LENGTH_MASK) + | |
cb00ea35 | 867 | (laarr[i + 1].extLength & UDF_EXTENT_LENGTH_MASK) + |
28de7948 CG |
868 | inode->i_sb->s_blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) { |
869 | laarr[i + 1].extLength = (laarr[i + 1].extLength - | |
870 | (laarr[i].extLength & UDF_EXTENT_LENGTH_MASK) + | |
871 | UDF_EXTENT_LENGTH_MASK) & ~(inode->i_sb->s_blocksize - 1); | |
872 | laarr[i].extLength = (laarr[i].extLength & UDF_EXTENT_FLAG_MASK) + | |
873 | (UDF_EXTENT_LENGTH_MASK + 1) - inode->i_sb->s_blocksize; | |
cb00ea35 CG |
874 | } else { |
875 | laarr[i].extLength = laarr[i + 1].extLength + | |
28de7948 CG |
876 | (((laarr[i].extLength & UDF_EXTENT_LENGTH_MASK) + |
877 | inode->i_sb->s_blocksize - 1) & ~(inode->i_sb->s_blocksize - 1)); | |
cb00ea35 CG |
878 | if (*endnum > (i + 2)) |
879 | memmove(&laarr[i + 1], &laarr[i + 2], | |
28de7948 | 880 | sizeof(long_ad) * (*endnum - (i + 2))); |
cb00ea35 CG |
881 | i--; |
882 | (*endnum)--; | |
1da177e4 | 883 | } |
28de7948 CG |
884 | } else if ((laarr[i].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30)) { |
885 | udf_free_blocks(inode->i_sb, inode, laarr[i].extLocation, 0, | |
886 | ((laarr[i].extLength & UDF_EXTENT_LENGTH_MASK) + | |
887 | inode->i_sb->s_blocksize - 1) >> inode->i_sb->s_blocksize_bits); | |
1da177e4 LT |
888 | laarr[i].extLocation.logicalBlockNum = 0; |
889 | laarr[i].extLocation.partitionReferenceNum = 0; | |
28de7948 CG |
890 | laarr[i].extLength = (laarr[i].extLength & UDF_EXTENT_LENGTH_MASK) | |
891 | EXT_NOT_RECORDED_NOT_ALLOCATED; | |
1da177e4 LT |
892 | } |
893 | } | |
894 | } | |
895 | ||
896 | static void udf_update_extents(struct inode *inode, | |
cb00ea35 CG |
897 | kernel_long_ad laarr[EXTENT_MERGE_SIZE], |
898 | int startnum, int endnum, | |
899 | struct extent_position *epos) | |
1da177e4 LT |
900 | { |
901 | int start = 0, i; | |
902 | kernel_lb_addr tmploc; | |
903 | uint32_t tmplen; | |
904 | ||
cb00ea35 CG |
905 | if (startnum > endnum) { |
906 | for (i = 0; i < (startnum - endnum); i++) | |
ff116fc8 | 907 | udf_delete_aext(inode, *epos, laarr[i].extLocation, |
cb00ea35 CG |
908 | laarr[i].extLength); |
909 | } else if (startnum < endnum) { | |
910 | for (i = 0; i < (endnum - startnum); i++) { | |
ff116fc8 | 911 | udf_insert_aext(inode, *epos, laarr[i].extLocation, |
cb00ea35 | 912 | laarr[i].extLength); |
ff116fc8 | 913 | udf_next_aext(inode, epos, &laarr[i].extLocation, |
cb00ea35 CG |
914 | &laarr[i].extLength, 1); |
915 | start++; | |
1da177e4 LT |
916 | } |
917 | } | |
918 | ||
cb00ea35 | 919 | for (i = start; i < endnum; i++) { |
ff116fc8 JK |
920 | udf_next_aext(inode, epos, &tmploc, &tmplen, 0); |
921 | udf_write_aext(inode, epos, laarr[i].extLocation, | |
cb00ea35 | 922 | laarr[i].extLength, 1); |
1da177e4 LT |
923 | } |
924 | } | |
925 | ||
cb00ea35 CG |
926 | struct buffer_head *udf_bread(struct inode *inode, int block, |
927 | int create, int *err) | |
1da177e4 | 928 | { |
cb00ea35 | 929 | struct buffer_head *bh = NULL; |
1da177e4 LT |
930 | |
931 | bh = udf_getblk(inode, block, create, err); | |
932 | if (!bh) | |
933 | return NULL; | |
934 | ||
935 | if (buffer_uptodate(bh)) | |
936 | return bh; | |
28de7948 | 937 | |
1da177e4 | 938 | ll_rw_block(READ, 1, &bh); |
28de7948 | 939 | |
1da177e4 LT |
940 | wait_on_buffer(bh); |
941 | if (buffer_uptodate(bh)) | |
942 | return bh; | |
28de7948 | 943 | |
1da177e4 LT |
944 | brelse(bh); |
945 | *err = -EIO; | |
946 | return NULL; | |
947 | } | |
948 | ||
cb00ea35 | 949 | void udf_truncate(struct inode *inode) |
1da177e4 LT |
950 | { |
951 | int offset; | |
952 | int err; | |
953 | ||
954 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || | |
cb00ea35 | 955 | S_ISLNK(inode->i_mode))) |
1da177e4 LT |
956 | return; |
957 | if (IS_APPEND(inode) || IS_IMMUTABLE(inode)) | |
958 | return; | |
959 | ||
960 | lock_kernel(); | |
cb00ea35 | 961 | if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_IN_ICB) { |
28de7948 CG |
962 | if (inode->i_sb->s_blocksize < (udf_file_entry_alloc_offset(inode) + |
963 | inode->i_size)) { | |
1da177e4 | 964 | udf_expand_file_adinicb(inode, inode->i_size, &err); |
cb00ea35 | 965 | if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_IN_ICB) { |
1da177e4 LT |
966 | inode->i_size = UDF_I_LENALLOC(inode); |
967 | unlock_kernel(); | |
968 | return; | |
28de7948 | 969 | } else { |
1da177e4 | 970 | udf_truncate_extents(inode); |
28de7948 | 971 | } |
cb00ea35 | 972 | } else { |
1da177e4 | 973 | offset = inode->i_size & (inode->i_sb->s_blocksize - 1); |
28de7948 CG |
974 | memset(UDF_I_DATA(inode) + UDF_I_LENEATTR(inode) + offset, 0x00, |
975 | inode->i_sb->s_blocksize - offset - udf_file_entry_alloc_offset(inode)); | |
1da177e4 LT |
976 | UDF_I_LENALLOC(inode) = inode->i_size; |
977 | } | |
cb00ea35 | 978 | } else { |
28de7948 | 979 | block_truncate_page(inode->i_mapping, inode->i_size, udf_get_block); |
1da177e4 | 980 | udf_truncate_extents(inode); |
647bd61a | 981 | } |
1da177e4 LT |
982 | |
983 | inode->i_mtime = inode->i_ctime = current_fs_time(inode->i_sb); | |
984 | if (IS_SYNC(inode)) | |
cb00ea35 | 985 | udf_sync_inode(inode); |
1da177e4 LT |
986 | else |
987 | mark_inode_dirty(inode); | |
988 | unlock_kernel(); | |
989 | } | |
990 | ||
cb00ea35 | 991 | static void __udf_read_inode(struct inode *inode) |
1da177e4 LT |
992 | { |
993 | struct buffer_head *bh = NULL; | |
994 | struct fileEntry *fe; | |
995 | uint16_t ident; | |
996 | ||
997 | /* | |
998 | * Set defaults, but the inode is still incomplete! | |
999 | * Note: get_new_inode() sets the following on a new inode: | |
1000 | * i_sb = sb | |
1001 | * i_no = ino | |
1002 | * i_flags = sb->s_flags | |
1003 | * i_state = 0 | |
1004 | * clean_inode(): zero fills and sets | |
1005 | * i_count = 1 | |
1006 | * i_nlink = 1 | |
1007 | * i_op = NULL; | |
1008 | */ | |
1da177e4 | 1009 | bh = udf_read_ptagged(inode->i_sb, UDF_I_LOCATION(inode), 0, &ident); |
cb00ea35 | 1010 | if (!bh) { |
1da177e4 | 1011 | printk(KERN_ERR "udf: udf_read_inode(ino %ld) failed !bh\n", |
cb00ea35 | 1012 | inode->i_ino); |
1da177e4 LT |
1013 | make_bad_inode(inode); |
1014 | return; | |
1015 | } | |
1016 | ||
1017 | if (ident != TAG_IDENT_FE && ident != TAG_IDENT_EFE && | |
cb00ea35 | 1018 | ident != TAG_IDENT_USE) { |
28de7948 | 1019 | printk(KERN_ERR "udf: udf_read_inode(ino %ld) failed ident=%d\n", |
cb00ea35 | 1020 | inode->i_ino, ident); |
3bf25cb4 | 1021 | brelse(bh); |
1da177e4 LT |
1022 | make_bad_inode(inode); |
1023 | return; | |
1024 | } | |
1025 | ||
1026 | fe = (struct fileEntry *)bh->b_data; | |
1027 | ||
cb00ea35 | 1028 | if (le16_to_cpu(fe->icbTag.strategyType) == 4096) { |
1da177e4 LT |
1029 | struct buffer_head *ibh = NULL, *nbh = NULL; |
1030 | struct indirectEntry *ie; | |
1031 | ||
28de7948 | 1032 | ibh = udf_read_ptagged(inode->i_sb, UDF_I_LOCATION(inode), 1, &ident); |
cb00ea35 CG |
1033 | if (ident == TAG_IDENT_IE) { |
1034 | if (ibh) { | |
1da177e4 LT |
1035 | kernel_lb_addr loc; |
1036 | ie = (struct indirectEntry *)ibh->b_data; | |
647bd61a | 1037 | |
1da177e4 | 1038 | loc = lelb_to_cpu(ie->indirectICB.extLocation); |
647bd61a CG |
1039 | |
1040 | if (ie->indirectICB.extLength && | |
28de7948 CG |
1041 | (nbh = udf_read_ptagged(inode->i_sb, loc, 0, &ident))) { |
1042 | if (ident == TAG_IDENT_FE || | |
1043 | ident == TAG_IDENT_EFE) { | |
1044 | memcpy(&UDF_I_LOCATION(inode), &loc, | |
cb00ea35 | 1045 | sizeof(kernel_lb_addr)); |
3bf25cb4 JK |
1046 | brelse(bh); |
1047 | brelse(ibh); | |
1048 | brelse(nbh); | |
1da177e4 LT |
1049 | __udf_read_inode(inode); |
1050 | return; | |
cb00ea35 | 1051 | } else { |
3bf25cb4 JK |
1052 | brelse(nbh); |
1053 | brelse(ibh); | |
1da177e4 | 1054 | } |
28de7948 | 1055 | } else { |
3bf25cb4 | 1056 | brelse(ibh); |
28de7948 | 1057 | } |
1da177e4 | 1058 | } |
28de7948 | 1059 | } else { |
3bf25cb4 | 1060 | brelse(ibh); |
28de7948 | 1061 | } |
cb00ea35 | 1062 | } else if (le16_to_cpu(fe->icbTag.strategyType) != 4) { |
1da177e4 | 1063 | printk(KERN_ERR "udf: unsupported strategy type: %d\n", |
cb00ea35 | 1064 | le16_to_cpu(fe->icbTag.strategyType)); |
3bf25cb4 | 1065 | brelse(bh); |
1da177e4 LT |
1066 | make_bad_inode(inode); |
1067 | return; | |
1068 | } | |
1069 | udf_fill_inode(inode, bh); | |
31170b6a | 1070 | |
3bf25cb4 | 1071 | brelse(bh); |
1da177e4 LT |
1072 | } |
1073 | ||
1074 | static void udf_fill_inode(struct inode *inode, struct buffer_head *bh) | |
1075 | { | |
1076 | struct fileEntry *fe; | |
1077 | struct extendedFileEntry *efe; | |
1078 | time_t convtime; | |
1079 | long convtime_usec; | |
1080 | int offset; | |
1081 | ||
1082 | fe = (struct fileEntry *)bh->b_data; | |
1083 | efe = (struct extendedFileEntry *)bh->b_data; | |
1084 | ||
1085 | if (le16_to_cpu(fe->icbTag.strategyType) == 4) | |
1086 | UDF_I_STRAT4096(inode) = 0; | |
28de7948 | 1087 | else /* if (le16_to_cpu(fe->icbTag.strategyType) == 4096) */ |
1da177e4 LT |
1088 | UDF_I_STRAT4096(inode) = 1; |
1089 | ||
28de7948 | 1090 | UDF_I_ALLOCTYPE(inode) = le16_to_cpu(fe->icbTag.flags) & ICBTAG_FLAG_AD_MASK; |
1da177e4 LT |
1091 | UDF_I_UNIQUE(inode) = 0; |
1092 | UDF_I_LENEATTR(inode) = 0; | |
1093 | UDF_I_LENEXTENTS(inode) = 0; | |
1094 | UDF_I_LENALLOC(inode) = 0; | |
1095 | UDF_I_NEXT_ALLOC_BLOCK(inode) = 0; | |
1096 | UDF_I_NEXT_ALLOC_GOAL(inode) = 0; | |
cb00ea35 | 1097 | if (le16_to_cpu(fe->descTag.tagIdent) == TAG_IDENT_EFE) { |
1da177e4 LT |
1098 | UDF_I_EFE(inode) = 1; |
1099 | UDF_I_USE(inode) = 0; | |
28de7948 | 1100 | if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize - sizeof(struct extendedFileEntry))) { |
647bd61a CG |
1101 | make_bad_inode(inode); |
1102 | return; | |
1103 | } | |
28de7948 CG |
1104 | memcpy(UDF_I_DATA(inode), bh->b_data + sizeof(struct extendedFileEntry), |
1105 | inode->i_sb->s_blocksize - sizeof(struct extendedFileEntry)); | |
cb00ea35 | 1106 | } else if (le16_to_cpu(fe->descTag.tagIdent) == TAG_IDENT_FE) { |
1da177e4 LT |
1107 | UDF_I_EFE(inode) = 0; |
1108 | UDF_I_USE(inode) = 0; | |
28de7948 | 1109 | if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize - sizeof(struct fileEntry))) { |
647bd61a CG |
1110 | make_bad_inode(inode); |
1111 | return; | |
1112 | } | |
cb00ea35 CG |
1113 | memcpy(UDF_I_DATA(inode), bh->b_data + sizeof(struct fileEntry), |
1114 | inode->i_sb->s_blocksize - sizeof(struct fileEntry)); | |
1115 | } else if (le16_to_cpu(fe->descTag.tagIdent) == TAG_IDENT_USE) { | |
1da177e4 LT |
1116 | UDF_I_EFE(inode) = 0; |
1117 | UDF_I_USE(inode) = 1; | |
1118 | UDF_I_LENALLOC(inode) = | |
28de7948 CG |
1119 | le32_to_cpu(((struct unallocSpaceEntry *)bh->b_data)->lengthAllocDescs); |
1120 | if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize - sizeof(struct unallocSpaceEntry))) { | |
647bd61a CG |
1121 | make_bad_inode(inode); |
1122 | return; | |
1123 | } | |
28de7948 CG |
1124 | memcpy(UDF_I_DATA(inode), bh->b_data + sizeof(struct unallocSpaceEntry), |
1125 | inode->i_sb->s_blocksize - sizeof(struct unallocSpaceEntry)); | |
1da177e4 LT |
1126 | return; |
1127 | } | |
1128 | ||
1129 | inode->i_uid = le32_to_cpu(fe->uid); | |
ca76d2d8 CG |
1130 | if (inode->i_uid == -1 || |
1131 | UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_IGNORE) || | |
1132 | UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_SET)) | |
4d6660eb | 1133 | inode->i_uid = UDF_SB(inode->i_sb)->s_uid; |
1da177e4 LT |
1134 | |
1135 | inode->i_gid = le32_to_cpu(fe->gid); | |
ca76d2d8 CG |
1136 | if (inode->i_gid == -1 || |
1137 | UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_IGNORE) || | |
1138 | UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_SET)) | |
4d6660eb | 1139 | inode->i_gid = UDF_SB(inode->i_sb)->s_gid; |
1da177e4 LT |
1140 | |
1141 | inode->i_nlink = le16_to_cpu(fe->fileLinkCount); | |
1142 | if (!inode->i_nlink) | |
1143 | inode->i_nlink = 1; | |
647bd61a | 1144 | |
1da177e4 LT |
1145 | inode->i_size = le64_to_cpu(fe->informationLength); |
1146 | UDF_I_LENEXTENTS(inode) = inode->i_size; | |
1147 | ||
1148 | inode->i_mode = udf_convert_permissions(fe); | |
1149 | inode->i_mode &= ~UDF_SB(inode->i_sb)->s_umask; | |
1150 | ||
cb00ea35 | 1151 | if (UDF_I_EFE(inode) == 0) { |
1da177e4 | 1152 | inode->i_blocks = le64_to_cpu(fe->logicalBlocksRecorded) << |
28de7948 | 1153 | (inode->i_sb->s_blocksize_bits - 9); |
1da177e4 | 1154 | |
cb00ea35 CG |
1155 | if (udf_stamp_to_time(&convtime, &convtime_usec, |
1156 | lets_to_cpu(fe->accessTime))) { | |
1da177e4 LT |
1157 | inode->i_atime.tv_sec = convtime; |
1158 | inode->i_atime.tv_nsec = convtime_usec * 1000; | |
cb00ea35 | 1159 | } else { |
1da177e4 LT |
1160 | inode->i_atime = UDF_SB_RECORDTIME(inode->i_sb); |
1161 | } | |
1162 | ||
cb00ea35 CG |
1163 | if (udf_stamp_to_time(&convtime, &convtime_usec, |
1164 | lets_to_cpu(fe->modificationTime))) { | |
1da177e4 LT |
1165 | inode->i_mtime.tv_sec = convtime; |
1166 | inode->i_mtime.tv_nsec = convtime_usec * 1000; | |
cb00ea35 | 1167 | } else { |
1da177e4 LT |
1168 | inode->i_mtime = UDF_SB_RECORDTIME(inode->i_sb); |
1169 | } | |
1170 | ||
cb00ea35 CG |
1171 | if (udf_stamp_to_time(&convtime, &convtime_usec, |
1172 | lets_to_cpu(fe->attrTime))) { | |
1da177e4 LT |
1173 | inode->i_ctime.tv_sec = convtime; |
1174 | inode->i_ctime.tv_nsec = convtime_usec * 1000; | |
cb00ea35 | 1175 | } else { |
1da177e4 LT |
1176 | inode->i_ctime = UDF_SB_RECORDTIME(inode->i_sb); |
1177 | } | |
1178 | ||
1179 | UDF_I_UNIQUE(inode) = le64_to_cpu(fe->uniqueID); | |
1180 | UDF_I_LENEATTR(inode) = le32_to_cpu(fe->lengthExtendedAttr); | |
1181 | UDF_I_LENALLOC(inode) = le32_to_cpu(fe->lengthAllocDescs); | |
1182 | offset = sizeof(struct fileEntry) + UDF_I_LENEATTR(inode); | |
cb00ea35 | 1183 | } else { |
647bd61a | 1184 | inode->i_blocks = le64_to_cpu(efe->logicalBlocksRecorded) << |
cb00ea35 | 1185 | (inode->i_sb->s_blocksize_bits - 9); |
1da177e4 | 1186 | |
cb00ea35 CG |
1187 | if (udf_stamp_to_time(&convtime, &convtime_usec, |
1188 | lets_to_cpu(efe->accessTime))) { | |
1da177e4 LT |
1189 | inode->i_atime.tv_sec = convtime; |
1190 | inode->i_atime.tv_nsec = convtime_usec * 1000; | |
cb00ea35 | 1191 | } else { |
1da177e4 LT |
1192 | inode->i_atime = UDF_SB_RECORDTIME(inode->i_sb); |
1193 | } | |
1194 | ||
cb00ea35 CG |
1195 | if (udf_stamp_to_time(&convtime, &convtime_usec, |
1196 | lets_to_cpu(efe->modificationTime))) { | |
1da177e4 LT |
1197 | inode->i_mtime.tv_sec = convtime; |
1198 | inode->i_mtime.tv_nsec = convtime_usec * 1000; | |
cb00ea35 | 1199 | } else { |
1da177e4 LT |
1200 | inode->i_mtime = UDF_SB_RECORDTIME(inode->i_sb); |
1201 | } | |
1202 | ||
cb00ea35 CG |
1203 | if (udf_stamp_to_time(&convtime, &convtime_usec, |
1204 | lets_to_cpu(efe->createTime))) { | |
1da177e4 LT |
1205 | UDF_I_CRTIME(inode).tv_sec = convtime; |
1206 | UDF_I_CRTIME(inode).tv_nsec = convtime_usec * 1000; | |
cb00ea35 | 1207 | } else { |
1da177e4 LT |
1208 | UDF_I_CRTIME(inode) = UDF_SB_RECORDTIME(inode->i_sb); |
1209 | } | |
1210 | ||
cb00ea35 CG |
1211 | if (udf_stamp_to_time(&convtime, &convtime_usec, |
1212 | lets_to_cpu(efe->attrTime))) { | |
1da177e4 LT |
1213 | inode->i_ctime.tv_sec = convtime; |
1214 | inode->i_ctime.tv_nsec = convtime_usec * 1000; | |
cb00ea35 | 1215 | } else { |
1da177e4 LT |
1216 | inode->i_ctime = UDF_SB_RECORDTIME(inode->i_sb); |
1217 | } | |
1218 | ||
1219 | UDF_I_UNIQUE(inode) = le64_to_cpu(efe->uniqueID); | |
1220 | UDF_I_LENEATTR(inode) = le32_to_cpu(efe->lengthExtendedAttr); | |
1221 | UDF_I_LENALLOC(inode) = le32_to_cpu(efe->lengthAllocDescs); | |
28de7948 | 1222 | offset = sizeof(struct extendedFileEntry) + UDF_I_LENEATTR(inode); |
1da177e4 LT |
1223 | } |
1224 | ||
cb00ea35 CG |
1225 | switch (fe->icbTag.fileType) { |
1226 | case ICBTAG_FILE_TYPE_DIRECTORY: | |
28de7948 CG |
1227 | inode->i_op = &udf_dir_inode_operations; |
1228 | inode->i_fop = &udf_dir_operations; | |
1229 | inode->i_mode |= S_IFDIR; | |
1230 | inc_nlink(inode); | |
1231 | break; | |
cb00ea35 CG |
1232 | case ICBTAG_FILE_TYPE_REALTIME: |
1233 | case ICBTAG_FILE_TYPE_REGULAR: | |
1234 | case ICBTAG_FILE_TYPE_UNDEF: | |
28de7948 CG |
1235 | if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_IN_ICB) |
1236 | inode->i_data.a_ops = &udf_adinicb_aops; | |
1237 | else | |
1238 | inode->i_data.a_ops = &udf_aops; | |
1239 | inode->i_op = &udf_file_inode_operations; | |
1240 | inode->i_fop = &udf_file_operations; | |
1241 | inode->i_mode |= S_IFREG; | |
1242 | break; | |
cb00ea35 | 1243 | case ICBTAG_FILE_TYPE_BLOCK: |
28de7948 CG |
1244 | inode->i_mode |= S_IFBLK; |
1245 | break; | |
cb00ea35 | 1246 | case ICBTAG_FILE_TYPE_CHAR: |
28de7948 CG |
1247 | inode->i_mode |= S_IFCHR; |
1248 | break; | |
cb00ea35 | 1249 | case ICBTAG_FILE_TYPE_FIFO: |
28de7948 CG |
1250 | init_special_inode(inode, inode->i_mode | S_IFIFO, 0); |
1251 | break; | |
cb00ea35 | 1252 | case ICBTAG_FILE_TYPE_SOCKET: |
28de7948 CG |
1253 | init_special_inode(inode, inode->i_mode | S_IFSOCK, 0); |
1254 | break; | |
cb00ea35 | 1255 | case ICBTAG_FILE_TYPE_SYMLINK: |
28de7948 CG |
1256 | inode->i_data.a_ops = &udf_symlink_aops; |
1257 | inode->i_op = &page_symlink_inode_operations; | |
1258 | inode->i_mode = S_IFLNK | S_IRWXUGO; | |
1259 | break; | |
cb00ea35 | 1260 | default: |
28de7948 CG |
1261 | printk(KERN_ERR "udf: udf_fill_inode(ino %ld) failed unknown file type=%d\n", |
1262 | inode->i_ino, fe->icbTag.fileType); | |
1263 | make_bad_inode(inode); | |
1264 | return; | |
1da177e4 | 1265 | } |
cb00ea35 | 1266 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { |
28de7948 | 1267 | struct deviceSpec *dsea = (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1); |
cb00ea35 CG |
1268 | if (dsea) { |
1269 | init_special_inode(inode, inode->i_mode, | |
28de7948 CG |
1270 | MKDEV(le32_to_cpu(dsea->majorDeviceIdent), |
1271 | le32_to_cpu(dsea->minorDeviceIdent))); | |
1da177e4 | 1272 | /* Developer ID ??? */ |
cb00ea35 | 1273 | } else { |
1da177e4 LT |
1274 | make_bad_inode(inode); |
1275 | } | |
1276 | } | |
1277 | } | |
1278 | ||
647bd61a CG |
1279 | static int udf_alloc_i_data(struct inode *inode, size_t size) |
1280 | { | |
1281 | UDF_I_DATA(inode) = kmalloc(size, GFP_KERNEL); | |
1282 | ||
cb00ea35 | 1283 | if (!UDF_I_DATA(inode)) { |
28de7948 | 1284 | printk(KERN_ERR "udf:udf_alloc_i_data (ino %ld) no free memory\n", |
647bd61a CG |
1285 | inode->i_ino); |
1286 | return -ENOMEM; | |
1287 | } | |
1288 | ||
1289 | return 0; | |
1290 | } | |
1291 | ||
cb00ea35 | 1292 | static mode_t udf_convert_permissions(struct fileEntry *fe) |
1da177e4 LT |
1293 | { |
1294 | mode_t mode; | |
1295 | uint32_t permissions; | |
1296 | uint32_t flags; | |
1297 | ||
1298 | permissions = le32_to_cpu(fe->permissions); | |
1299 | flags = le16_to_cpu(fe->icbTag.flags); | |
1300 | ||
28de7948 CG |
1301 | mode = (( permissions ) & S_IRWXO) | |
1302 | (( permissions >> 2 ) & S_IRWXG) | | |
1303 | (( permissions >> 4 ) & S_IRWXU) | | |
1304 | (( flags & ICBTAG_FLAG_SETUID) ? S_ISUID : 0) | | |
1305 | (( flags & ICBTAG_FLAG_SETGID) ? S_ISGID : 0) | | |
1306 | (( flags & ICBTAG_FLAG_STICKY) ? S_ISVTX : 0); | |
1da177e4 LT |
1307 | |
1308 | return mode; | |
1309 | } | |
1310 | ||
1311 | /* | |
1312 | * udf_write_inode | |
1313 | * | |
1314 | * PURPOSE | |
1315 | * Write out the specified inode. | |
1316 | * | |
1317 | * DESCRIPTION | |
1318 | * This routine is called whenever an inode is synced. | |
1319 | * Currently this routine is just a placeholder. | |
1320 | * | |
1321 | * HISTORY | |
1322 | * July 1, 1997 - Andrew E. Mileski | |
1323 | * Written, tested, and released. | |
1324 | */ | |
1325 | ||
cb00ea35 | 1326 | int udf_write_inode(struct inode *inode, int sync) |
1da177e4 LT |
1327 | { |
1328 | int ret; | |
28de7948 | 1329 | |
1da177e4 LT |
1330 | lock_kernel(); |
1331 | ret = udf_update_inode(inode, sync); | |
1332 | unlock_kernel(); | |
28de7948 | 1333 | |
1da177e4 LT |
1334 | return ret; |
1335 | } | |
1336 | ||
cb00ea35 | 1337 | int udf_sync_inode(struct inode *inode) |
1da177e4 LT |
1338 | { |
1339 | return udf_update_inode(inode, 1); | |
1340 | } | |
1341 | ||
cb00ea35 | 1342 | static int udf_update_inode(struct inode *inode, int do_sync) |
1da177e4 LT |
1343 | { |
1344 | struct buffer_head *bh = NULL; | |
1345 | struct fileEntry *fe; | |
1346 | struct extendedFileEntry *efe; | |
1347 | uint32_t udfperms; | |
1348 | uint16_t icbflags; | |
1349 | uint16_t crclen; | |
1350 | int i; | |
1351 | kernel_timestamp cpu_time; | |
1352 | int err = 0; | |
1353 | ||
28de7948 | 1354 | bh = udf_tread(inode->i_sb, udf_get_lb_pblock(inode->i_sb, UDF_I_LOCATION(inode), 0)); |
cb00ea35 | 1355 | if (!bh) { |
1da177e4 LT |
1356 | udf_debug("bread failure\n"); |
1357 | return -EIO; | |
1358 | } | |
1359 | ||
1360 | memset(bh->b_data, 0x00, inode->i_sb->s_blocksize); | |
1361 | ||
1362 | fe = (struct fileEntry *)bh->b_data; | |
1363 | efe = (struct extendedFileEntry *)bh->b_data; | |
1364 | ||
cb00ea35 | 1365 | if (le16_to_cpu(fe->descTag.tagIdent) == TAG_IDENT_USE) { |
1da177e4 | 1366 | struct unallocSpaceEntry *use = |
28de7948 | 1367 | (struct unallocSpaceEntry *)bh->b_data; |
1da177e4 LT |
1368 | |
1369 | use->lengthAllocDescs = cpu_to_le32(UDF_I_LENALLOC(inode)); | |
28de7948 CG |
1370 | memcpy(bh->b_data + sizeof(struct unallocSpaceEntry), UDF_I_DATA(inode), |
1371 | inode->i_sb->s_blocksize - sizeof(struct unallocSpaceEntry)); | |
1372 | crclen = sizeof(struct unallocSpaceEntry) + UDF_I_LENALLOC(inode) - sizeof(tag); | |
1373 | use->descTag.tagLocation = cpu_to_le32(UDF_I_LOCATION(inode).logicalBlockNum); | |
1da177e4 | 1374 | use->descTag.descCRCLength = cpu_to_le16(crclen); |
28de7948 | 1375 | use->descTag.descCRC = cpu_to_le16(udf_crc((char *)use + sizeof(tag), crclen, 0)); |
1da177e4 LT |
1376 | |
1377 | use->descTag.tagChecksum = 0; | |
28de7948 | 1378 | for (i = 0; i < 16; i++) { |
1da177e4 | 1379 | if (i != 4) |
28de7948 CG |
1380 | use->descTag.tagChecksum += ((uint8_t *)&(use->descTag))[i]; |
1381 | } | |
1da177e4 LT |
1382 | |
1383 | mark_buffer_dirty(bh); | |
3bf25cb4 | 1384 | brelse(bh); |
1da177e4 LT |
1385 | return err; |
1386 | } | |
1387 | ||
4d6660eb PS |
1388 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_FORGET)) |
1389 | fe->uid = cpu_to_le32(-1); | |
cb00ea35 CG |
1390 | else |
1391 | fe->uid = cpu_to_le32(inode->i_uid); | |
1da177e4 | 1392 | |
4d6660eb PS |
1393 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_FORGET)) |
1394 | fe->gid = cpu_to_le32(-1); | |
cb00ea35 CG |
1395 | else |
1396 | fe->gid = cpu_to_le32(inode->i_gid); | |
1da177e4 | 1397 | |
28de7948 CG |
1398 | udfperms = ((inode->i_mode & S_IRWXO) ) | |
1399 | ((inode->i_mode & S_IRWXG) << 2) | | |
1400 | ((inode->i_mode & S_IRWXU) << 4); | |
1da177e4 | 1401 | |
28de7948 CG |
1402 | udfperms |= (le32_to_cpu(fe->permissions) & |
1403 | (FE_PERM_O_DELETE | FE_PERM_O_CHATTR | | |
1404 | FE_PERM_G_DELETE | FE_PERM_G_CHATTR | | |
1405 | FE_PERM_U_DELETE | FE_PERM_U_CHATTR)); | |
1da177e4 LT |
1406 | fe->permissions = cpu_to_le32(udfperms); |
1407 | ||
1408 | if (S_ISDIR(inode->i_mode)) | |
1409 | fe->fileLinkCount = cpu_to_le16(inode->i_nlink - 1); | |
1410 | else | |
1411 | fe->fileLinkCount = cpu_to_le16(inode->i_nlink); | |
1412 | ||
1413 | fe->informationLength = cpu_to_le64(inode->i_size); | |
1414 | ||
cb00ea35 | 1415 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { |
1da177e4 | 1416 | regid *eid; |
28de7948 CG |
1417 | struct deviceSpec *dsea = |
1418 | (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1); | |
cb00ea35 | 1419 | if (!dsea) { |
1da177e4 | 1420 | dsea = (struct deviceSpec *) |
28de7948 CG |
1421 | udf_add_extendedattr(inode, |
1422 | sizeof(struct deviceSpec) + | |
1423 | sizeof(regid), 12, 0x3); | |
1da177e4 LT |
1424 | dsea->attrType = cpu_to_le32(12); |
1425 | dsea->attrSubtype = 1; | |
28de7948 CG |
1426 | dsea->attrLength = cpu_to_le32(sizeof(struct deviceSpec) + |
1427 | sizeof(regid)); | |
1da177e4 LT |
1428 | dsea->impUseLength = cpu_to_le32(sizeof(regid)); |
1429 | } | |
28de7948 | 1430 | eid = (regid *)dsea->impUse; |
1da177e4 LT |
1431 | memset(eid, 0, sizeof(regid)); |
1432 | strcpy(eid->ident, UDF_ID_DEVELOPER); | |
1433 | eid->identSuffix[0] = UDF_OS_CLASS_UNIX; | |
1434 | eid->identSuffix[1] = UDF_OS_ID_LINUX; | |
1435 | dsea->majorDeviceIdent = cpu_to_le32(imajor(inode)); | |
1436 | dsea->minorDeviceIdent = cpu_to_le32(iminor(inode)); | |
1437 | } | |
1438 | ||
cb00ea35 CG |
1439 | if (UDF_I_EFE(inode) == 0) { |
1440 | memcpy(bh->b_data + sizeof(struct fileEntry), UDF_I_DATA(inode), | |
1441 | inode->i_sb->s_blocksize - sizeof(struct fileEntry)); | |
28de7948 CG |
1442 | fe->logicalBlocksRecorded = cpu_to_le64( |
1443 | (inode->i_blocks + (1 << (inode->i_sb->s_blocksize_bits - 9)) - 1) >> | |
1444 | (inode->i_sb->s_blocksize_bits - 9)); | |
1da177e4 LT |
1445 | |
1446 | if (udf_time_to_stamp(&cpu_time, inode->i_atime)) | |
1447 | fe->accessTime = cpu_to_lets(cpu_time); | |
1448 | if (udf_time_to_stamp(&cpu_time, inode->i_mtime)) | |
1449 | fe->modificationTime = cpu_to_lets(cpu_time); | |
1450 | if (udf_time_to_stamp(&cpu_time, inode->i_ctime)) | |
1451 | fe->attrTime = cpu_to_lets(cpu_time); | |
1452 | memset(&(fe->impIdent), 0, sizeof(regid)); | |
1453 | strcpy(fe->impIdent.ident, UDF_ID_DEVELOPER); | |
1454 | fe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; | |
1455 | fe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; | |
1456 | fe->uniqueID = cpu_to_le64(UDF_I_UNIQUE(inode)); | |
1457 | fe->lengthExtendedAttr = cpu_to_le32(UDF_I_LENEATTR(inode)); | |
1458 | fe->lengthAllocDescs = cpu_to_le32(UDF_I_LENALLOC(inode)); | |
1459 | fe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_FE); | |
1460 | crclen = sizeof(struct fileEntry); | |
cb00ea35 | 1461 | } else { |
28de7948 CG |
1462 | memcpy(bh->b_data + sizeof(struct extendedFileEntry), UDF_I_DATA(inode), |
1463 | inode->i_sb->s_blocksize - sizeof(struct extendedFileEntry)); | |
1da177e4 | 1464 | efe->objectSize = cpu_to_le64(inode->i_size); |
28de7948 CG |
1465 | efe->logicalBlocksRecorded = cpu_to_le64( |
1466 | (inode->i_blocks + (1 << (inode->i_sb->s_blocksize_bits - 9)) - 1) >> | |
1467 | (inode->i_sb->s_blocksize_bits - 9)); | |
1da177e4 LT |
1468 | |
1469 | if (UDF_I_CRTIME(inode).tv_sec > inode->i_atime.tv_sec || | |
cb00ea35 CG |
1470 | (UDF_I_CRTIME(inode).tv_sec == inode->i_atime.tv_sec && |
1471 | UDF_I_CRTIME(inode).tv_nsec > inode->i_atime.tv_nsec)) { | |
1da177e4 LT |
1472 | UDF_I_CRTIME(inode) = inode->i_atime; |
1473 | } | |
1474 | if (UDF_I_CRTIME(inode).tv_sec > inode->i_mtime.tv_sec || | |
cb00ea35 CG |
1475 | (UDF_I_CRTIME(inode).tv_sec == inode->i_mtime.tv_sec && |
1476 | UDF_I_CRTIME(inode).tv_nsec > inode->i_mtime.tv_nsec)) { | |
1da177e4 LT |
1477 | UDF_I_CRTIME(inode) = inode->i_mtime; |
1478 | } | |
1479 | if (UDF_I_CRTIME(inode).tv_sec > inode->i_ctime.tv_sec || | |
cb00ea35 CG |
1480 | (UDF_I_CRTIME(inode).tv_sec == inode->i_ctime.tv_sec && |
1481 | UDF_I_CRTIME(inode).tv_nsec > inode->i_ctime.tv_nsec)) { | |
1da177e4 LT |
1482 | UDF_I_CRTIME(inode) = inode->i_ctime; |
1483 | } | |
1484 | ||
1485 | if (udf_time_to_stamp(&cpu_time, inode->i_atime)) | |
1486 | efe->accessTime = cpu_to_lets(cpu_time); | |
1487 | if (udf_time_to_stamp(&cpu_time, inode->i_mtime)) | |
1488 | efe->modificationTime = cpu_to_lets(cpu_time); | |
1489 | if (udf_time_to_stamp(&cpu_time, UDF_I_CRTIME(inode))) | |
1490 | efe->createTime = cpu_to_lets(cpu_time); | |
1491 | if (udf_time_to_stamp(&cpu_time, inode->i_ctime)) | |
1492 | efe->attrTime = cpu_to_lets(cpu_time); | |
1493 | ||
1494 | memset(&(efe->impIdent), 0, sizeof(regid)); | |
1495 | strcpy(efe->impIdent.ident, UDF_ID_DEVELOPER); | |
1496 | efe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; | |
1497 | efe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; | |
1498 | efe->uniqueID = cpu_to_le64(UDF_I_UNIQUE(inode)); | |
1499 | efe->lengthExtendedAttr = cpu_to_le32(UDF_I_LENEATTR(inode)); | |
1500 | efe->lengthAllocDescs = cpu_to_le32(UDF_I_LENALLOC(inode)); | |
1501 | efe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_EFE); | |
1502 | crclen = sizeof(struct extendedFileEntry); | |
1503 | } | |
cb00ea35 | 1504 | if (UDF_I_STRAT4096(inode)) { |
1da177e4 LT |
1505 | fe->icbTag.strategyType = cpu_to_le16(4096); |
1506 | fe->icbTag.strategyParameter = cpu_to_le16(1); | |
1507 | fe->icbTag.numEntries = cpu_to_le16(2); | |
cb00ea35 | 1508 | } else { |
1da177e4 LT |
1509 | fe->icbTag.strategyType = cpu_to_le16(4); |
1510 | fe->icbTag.numEntries = cpu_to_le16(1); | |
1511 | } | |
1512 | ||
1513 | if (S_ISDIR(inode->i_mode)) | |
1514 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_DIRECTORY; | |
1515 | else if (S_ISREG(inode->i_mode)) | |
1516 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_REGULAR; | |
1517 | else if (S_ISLNK(inode->i_mode)) | |
1518 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_SYMLINK; | |
1519 | else if (S_ISBLK(inode->i_mode)) | |
1520 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_BLOCK; | |
1521 | else if (S_ISCHR(inode->i_mode)) | |
1522 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_CHAR; | |
1523 | else if (S_ISFIFO(inode->i_mode)) | |
1524 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_FIFO; | |
1525 | else if (S_ISSOCK(inode->i_mode)) | |
1526 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_SOCKET; | |
1527 | ||
28de7948 CG |
1528 | icbflags = UDF_I_ALLOCTYPE(inode) | |
1529 | ((inode->i_mode & S_ISUID) ? ICBTAG_FLAG_SETUID : 0) | | |
1530 | ((inode->i_mode & S_ISGID) ? ICBTAG_FLAG_SETGID : 0) | | |
1531 | ((inode->i_mode & S_ISVTX) ? ICBTAG_FLAG_STICKY : 0) | | |
1532 | (le16_to_cpu(fe->icbTag.flags) & | |
1533 | ~(ICBTAG_FLAG_AD_MASK | ICBTAG_FLAG_SETUID | | |
1534 | ICBTAG_FLAG_SETGID | ICBTAG_FLAG_STICKY)); | |
1da177e4 LT |
1535 | |
1536 | fe->icbTag.flags = cpu_to_le16(icbflags); | |
1537 | if (UDF_SB_UDFREV(inode->i_sb) >= 0x0200) | |
1538 | fe->descTag.descVersion = cpu_to_le16(3); | |
1539 | else | |
1540 | fe->descTag.descVersion = cpu_to_le16(2); | |
1541 | fe->descTag.tagSerialNum = cpu_to_le16(UDF_SB_SERIALNUM(inode->i_sb)); | |
28de7948 | 1542 | fe->descTag.tagLocation = cpu_to_le32(UDF_I_LOCATION(inode).logicalBlockNum); |
1da177e4 LT |
1543 | crclen += UDF_I_LENEATTR(inode) + UDF_I_LENALLOC(inode) - sizeof(tag); |
1544 | fe->descTag.descCRCLength = cpu_to_le16(crclen); | |
28de7948 | 1545 | fe->descTag.descCRC = cpu_to_le16(udf_crc((char *)fe + sizeof(tag), crclen, 0)); |
1da177e4 LT |
1546 | |
1547 | fe->descTag.tagChecksum = 0; | |
28de7948 | 1548 | for (i = 0; i < 16; i++) { |
1da177e4 | 1549 | if (i != 4) |
28de7948 CG |
1550 | fe->descTag.tagChecksum += ((uint8_t *)&(fe->descTag))[i]; |
1551 | } | |
1da177e4 LT |
1552 | |
1553 | /* write the data blocks */ | |
1554 | mark_buffer_dirty(bh); | |
cb00ea35 | 1555 | if (do_sync) { |
1da177e4 | 1556 | sync_dirty_buffer(bh); |
cb00ea35 | 1557 | if (buffer_req(bh) && !buffer_uptodate(bh)) { |
1da177e4 | 1558 | printk("IO error syncing udf inode [%s:%08lx]\n", |
cb00ea35 | 1559 | inode->i_sb->s_id, inode->i_ino); |
1da177e4 LT |
1560 | err = -EIO; |
1561 | } | |
1562 | } | |
3bf25cb4 | 1563 | brelse(bh); |
28de7948 | 1564 | |
1da177e4 LT |
1565 | return err; |
1566 | } | |
1567 | ||
cb00ea35 | 1568 | struct inode *udf_iget(struct super_block *sb, kernel_lb_addr ino) |
1da177e4 LT |
1569 | { |
1570 | unsigned long block = udf_get_lb_pblock(sb, ino, 0); | |
1571 | struct inode *inode = iget_locked(sb, block); | |
1572 | ||
1573 | if (!inode) | |
1574 | return NULL; | |
1575 | ||
1576 | if (inode->i_state & I_NEW) { | |
1577 | memcpy(&UDF_I_LOCATION(inode), &ino, sizeof(kernel_lb_addr)); | |
1578 | __udf_read_inode(inode); | |
1579 | unlock_new_inode(inode); | |
1580 | } | |
1581 | ||
1582 | if (is_bad_inode(inode)) | |
1583 | goto out_iput; | |
1584 | ||
28de7948 | 1585 | if (ino.logicalBlockNum >= UDF_SB_PARTLEN(sb, ino.partitionReferenceNum)) { |
1da177e4 | 1586 | udf_debug("block=%d, partition=%d out of range\n", |
cb00ea35 | 1587 | ino.logicalBlockNum, ino.partitionReferenceNum); |
1da177e4 LT |
1588 | make_bad_inode(inode); |
1589 | goto out_iput; | |
1590 | } | |
1591 | ||
1592 | return inode; | |
1593 | ||
28de7948 | 1594 | out_iput: |
1da177e4 LT |
1595 | iput(inode); |
1596 | return NULL; | |
1597 | } | |
1598 | ||
cb00ea35 CG |
1599 | int8_t udf_add_aext(struct inode * inode, struct extent_position * epos, |
1600 | kernel_lb_addr eloc, uint32_t elen, int inc) | |
1da177e4 LT |
1601 | { |
1602 | int adsize; | |
1603 | short_ad *sad = NULL; | |
1604 | long_ad *lad = NULL; | |
1605 | struct allocExtDesc *aed; | |
1606 | int8_t etype; | |
1607 | uint8_t *ptr; | |
1608 | ||
ff116fc8 | 1609 | if (!epos->bh) |
28de7948 | 1610 | ptr = UDF_I_DATA(inode) + epos->offset - udf_file_entry_alloc_offset(inode) + UDF_I_LENEATTR(inode); |
1da177e4 | 1611 | else |
ff116fc8 | 1612 | ptr = epos->bh->b_data + epos->offset; |
1da177e4 LT |
1613 | |
1614 | if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_SHORT) | |
1615 | adsize = sizeof(short_ad); | |
1616 | else if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_LONG) | |
1617 | adsize = sizeof(long_ad); | |
1618 | else | |
1619 | return -1; | |
1620 | ||
cb00ea35 | 1621 | if (epos->offset + (2 * adsize) > inode->i_sb->s_blocksize) { |
1da177e4 LT |
1622 | char *sptr, *dptr; |
1623 | struct buffer_head *nbh; | |
1624 | int err, loffset; | |
ff116fc8 | 1625 | kernel_lb_addr obloc = epos->block; |
1da177e4 | 1626 | |
28de7948 CG |
1627 | if (!(epos->block.logicalBlockNum = udf_new_block(inode->i_sb, NULL, |
1628 | obloc.partitionReferenceNum, | |
1629 | obloc.logicalBlockNum, &err))) { | |
1da177e4 LT |
1630 | return -1; |
1631 | } | |
28de7948 CG |
1632 | if (!(nbh = udf_tgetblk(inode->i_sb, udf_get_lb_pblock(inode->i_sb, |
1633 | epos->block, 0)))) { | |
1da177e4 LT |
1634 | return -1; |
1635 | } | |
1636 | lock_buffer(nbh); | |
1637 | memset(nbh->b_data, 0x00, inode->i_sb->s_blocksize); | |
1638 | set_buffer_uptodate(nbh); | |
1639 | unlock_buffer(nbh); | |
1640 | mark_buffer_dirty_inode(nbh, inode); | |
1641 | ||
1642 | aed = (struct allocExtDesc *)(nbh->b_data); | |
1643 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT)) | |
28de7948 | 1644 | aed->previousAllocExtLocation = cpu_to_le32(obloc.logicalBlockNum); |
cb00ea35 | 1645 | if (epos->offset + adsize > inode->i_sb->s_blocksize) { |
ff116fc8 | 1646 | loffset = epos->offset; |
1da177e4 LT |
1647 | aed->lengthAllocDescs = cpu_to_le32(adsize); |
1648 | sptr = ptr - adsize; | |
1649 | dptr = nbh->b_data + sizeof(struct allocExtDesc); | |
1650 | memcpy(dptr, sptr, adsize); | |
ff116fc8 | 1651 | epos->offset = sizeof(struct allocExtDesc) + adsize; |
cb00ea35 | 1652 | } else { |
ff116fc8 | 1653 | loffset = epos->offset + adsize; |
1da177e4 LT |
1654 | aed->lengthAllocDescs = cpu_to_le32(0); |
1655 | sptr = ptr; | |
ff116fc8 | 1656 | epos->offset = sizeof(struct allocExtDesc); |
1da177e4 | 1657 | |
cb00ea35 | 1658 | if (epos->bh) { |
ff116fc8 | 1659 | aed = (struct allocExtDesc *)epos->bh->b_data; |
1da177e4 | 1660 | aed->lengthAllocDescs = |
28de7948 | 1661 | cpu_to_le32(le32_to_cpu(aed->lengthAllocDescs) + adsize); |
cb00ea35 | 1662 | } else { |
1da177e4 LT |
1663 | UDF_I_LENALLOC(inode) += adsize; |
1664 | mark_inode_dirty(inode); | |
1665 | } | |
1666 | } | |
1667 | if (UDF_SB_UDFREV(inode->i_sb) >= 0x0200) | |
1668 | udf_new_tag(nbh->b_data, TAG_IDENT_AED, 3, 1, | |
cb00ea35 | 1669 | epos->block.logicalBlockNum, sizeof(tag)); |
1da177e4 LT |
1670 | else |
1671 | udf_new_tag(nbh->b_data, TAG_IDENT_AED, 2, 1, | |
cb00ea35 CG |
1672 | epos->block.logicalBlockNum, sizeof(tag)); |
1673 | switch (UDF_I_ALLOCTYPE(inode)) { | |
1674 | case ICBTAG_FLAG_AD_SHORT: | |
28de7948 CG |
1675 | sad = (short_ad *)sptr; |
1676 | sad->extLength = cpu_to_le32(EXT_NEXT_EXTENT_ALLOCDECS | | |
1677 | inode->i_sb->s_blocksize); | |
1678 | sad->extPosition = cpu_to_le32(epos->block.logicalBlockNum); | |
1679 | break; | |
cb00ea35 | 1680 | case ICBTAG_FLAG_AD_LONG: |
28de7948 CG |
1681 | lad = (long_ad *)sptr; |
1682 | lad->extLength = cpu_to_le32(EXT_NEXT_EXTENT_ALLOCDECS | | |
1683 | inode->i_sb->s_blocksize); | |
1684 | lad->extLocation = cpu_to_lelb(epos->block); | |
1685 | memset(lad->impUse, 0x00, sizeof(lad->impUse)); | |
1686 | break; | |
1da177e4 | 1687 | } |
cb00ea35 | 1688 | if (epos->bh) { |
28de7948 CG |
1689 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
1690 | UDF_SB_UDFREV(inode->i_sb) >= 0x0201) | |
ff116fc8 | 1691 | udf_update_tag(epos->bh->b_data, loffset); |
1da177e4 | 1692 | else |
28de7948 | 1693 | udf_update_tag(epos->bh->b_data, sizeof(struct allocExtDesc)); |
ff116fc8 | 1694 | mark_buffer_dirty_inode(epos->bh, inode); |
3bf25cb4 | 1695 | brelse(epos->bh); |
28de7948 | 1696 | } else { |
1da177e4 | 1697 | mark_inode_dirty(inode); |
28de7948 | 1698 | } |
ff116fc8 | 1699 | epos->bh = nbh; |
1da177e4 LT |
1700 | } |
1701 | ||
ff116fc8 | 1702 | etype = udf_write_aext(inode, epos, eloc, elen, inc); |
1da177e4 | 1703 | |
cb00ea35 | 1704 | if (!epos->bh) { |
1da177e4 LT |
1705 | UDF_I_LENALLOC(inode) += adsize; |
1706 | mark_inode_dirty(inode); | |
cb00ea35 | 1707 | } else { |
ff116fc8 | 1708 | aed = (struct allocExtDesc *)epos->bh->b_data; |
1da177e4 | 1709 | aed->lengthAllocDescs = |
28de7948 CG |
1710 | cpu_to_le32(le32_to_cpu(aed->lengthAllocDescs) + adsize); |
1711 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || UDF_SB_UDFREV(inode->i_sb) >= 0x0201) | |
1712 | udf_update_tag(epos->bh->b_data, epos->offset + (inc ? 0 : adsize)); | |
1da177e4 | 1713 | else |
28de7948 | 1714 | udf_update_tag(epos->bh->b_data, sizeof(struct allocExtDesc)); |
ff116fc8 | 1715 | mark_buffer_dirty_inode(epos->bh, inode); |
1da177e4 LT |
1716 | } |
1717 | ||
1718 | return etype; | |
1719 | } | |
1720 | ||
cb00ea35 CG |
1721 | int8_t udf_write_aext(struct inode * inode, struct extent_position * epos, |
1722 | kernel_lb_addr eloc, uint32_t elen, int inc) | |
1da177e4 LT |
1723 | { |
1724 | int adsize; | |
1725 | uint8_t *ptr; | |
28de7948 CG |
1726 | short_ad *sad; |
1727 | long_ad *lad; | |
1da177e4 | 1728 | |
ff116fc8 | 1729 | if (!epos->bh) |
28de7948 | 1730 | ptr = UDF_I_DATA(inode) + epos->offset - udf_file_entry_alloc_offset(inode) + UDF_I_LENEATTR(inode); |
1da177e4 | 1731 | else |
ff116fc8 | 1732 | ptr = epos->bh->b_data + epos->offset; |
1da177e4 | 1733 | |
cb00ea35 CG |
1734 | switch (UDF_I_ALLOCTYPE(inode)) { |
1735 | case ICBTAG_FLAG_AD_SHORT: | |
28de7948 CG |
1736 | sad = (short_ad *)ptr; |
1737 | sad->extLength = cpu_to_le32(elen); | |
1738 | sad->extPosition = cpu_to_le32(eloc.logicalBlockNum); | |
1739 | adsize = sizeof(short_ad); | |
1740 | break; | |
cb00ea35 | 1741 | case ICBTAG_FLAG_AD_LONG: |
28de7948 CG |
1742 | lad = (long_ad *)ptr; |
1743 | lad->extLength = cpu_to_le32(elen); | |
1744 | lad->extLocation = cpu_to_lelb(eloc); | |
1745 | memset(lad->impUse, 0x00, sizeof(lad->impUse)); | |
1746 | adsize = sizeof(long_ad); | |
1747 | break; | |
cb00ea35 CG |
1748 | default: |
1749 | return -1; | |
1da177e4 LT |
1750 | } |
1751 | ||
cb00ea35 | 1752 | if (epos->bh) { |
28de7948 CG |
1753 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
1754 | UDF_SB_UDFREV(inode->i_sb) >= 0x0201) { | |
1755 | struct allocExtDesc *aed = (struct allocExtDesc *)epos->bh->b_data; | |
ff116fc8 | 1756 | udf_update_tag(epos->bh->b_data, |
28de7948 | 1757 | le32_to_cpu(aed->lengthAllocDescs) + sizeof(struct allocExtDesc)); |
1da177e4 | 1758 | } |
ff116fc8 | 1759 | mark_buffer_dirty_inode(epos->bh, inode); |
28de7948 | 1760 | } else { |
1da177e4 | 1761 | mark_inode_dirty(inode); |
28de7948 | 1762 | } |
1da177e4 LT |
1763 | |
1764 | if (inc) | |
ff116fc8 | 1765 | epos->offset += adsize; |
28de7948 | 1766 | |
1da177e4 LT |
1767 | return (elen >> 30); |
1768 | } | |
1769 | ||
cb00ea35 CG |
1770 | int8_t udf_next_aext(struct inode * inode, struct extent_position * epos, |
1771 | kernel_lb_addr * eloc, uint32_t * elen, int inc) | |
1da177e4 LT |
1772 | { |
1773 | int8_t etype; | |
1774 | ||
ff116fc8 | 1775 | while ((etype = udf_current_aext(inode, epos, eloc, elen, inc)) == |
cb00ea35 | 1776 | (EXT_NEXT_EXTENT_ALLOCDECS >> 30)) { |
ff116fc8 JK |
1777 | epos->block = *eloc; |
1778 | epos->offset = sizeof(struct allocExtDesc); | |
3bf25cb4 | 1779 | brelse(epos->bh); |
28de7948 | 1780 | if (!(epos->bh = udf_tread(inode->i_sb, udf_get_lb_pblock(inode->i_sb, epos->block, 0)))) { |
1da177e4 | 1781 | udf_debug("reading block %d failed!\n", |
28de7948 | 1782 | udf_get_lb_pblock(inode->i_sb, epos->block, 0)); |
1da177e4 LT |
1783 | return -1; |
1784 | } | |
1785 | } | |
1786 | ||
1787 | return etype; | |
1788 | } | |
1789 | ||
cb00ea35 CG |
1790 | int8_t udf_current_aext(struct inode * inode, struct extent_position * epos, |
1791 | kernel_lb_addr * eloc, uint32_t * elen, int inc) | |
1da177e4 LT |
1792 | { |
1793 | int alen; | |
1794 | int8_t etype; | |
1795 | uint8_t *ptr; | |
28de7948 CG |
1796 | short_ad *sad; |
1797 | long_ad *lad; | |
1798 | ||
1da177e4 | 1799 | |
cb00ea35 | 1800 | if (!epos->bh) { |
ff116fc8 JK |
1801 | if (!epos->offset) |
1802 | epos->offset = udf_file_entry_alloc_offset(inode); | |
28de7948 CG |
1803 | ptr = UDF_I_DATA(inode) + epos->offset - udf_file_entry_alloc_offset(inode) + UDF_I_LENEATTR(inode); |
1804 | alen = udf_file_entry_alloc_offset(inode) + UDF_I_LENALLOC(inode); | |
cb00ea35 | 1805 | } else { |
ff116fc8 JK |
1806 | if (!epos->offset) |
1807 | epos->offset = sizeof(struct allocExtDesc); | |
1808 | ptr = epos->bh->b_data + epos->offset; | |
28de7948 CG |
1809 | alen = sizeof(struct allocExtDesc) + |
1810 | le32_to_cpu(((struct allocExtDesc *)epos->bh->b_data)->lengthAllocDescs); | |
1da177e4 LT |
1811 | } |
1812 | ||
cb00ea35 CG |
1813 | switch (UDF_I_ALLOCTYPE(inode)) { |
1814 | case ICBTAG_FLAG_AD_SHORT: | |
28de7948 CG |
1815 | if (!(sad = udf_get_fileshortad(ptr, alen, &epos->offset, inc))) |
1816 | return -1; | |
1817 | etype = le32_to_cpu(sad->extLength) >> 30; | |
1818 | eloc->logicalBlockNum = le32_to_cpu(sad->extPosition); | |
1819 | eloc->partitionReferenceNum = UDF_I_LOCATION(inode).partitionReferenceNum; | |
1820 | *elen = le32_to_cpu(sad->extLength) & UDF_EXTENT_LENGTH_MASK; | |
1821 | break; | |
cb00ea35 | 1822 | case ICBTAG_FLAG_AD_LONG: |
28de7948 | 1823 | if (!(lad = udf_get_filelongad(ptr, alen, &epos->offset, inc))) |
1da177e4 | 1824 | return -1; |
28de7948 CG |
1825 | etype = le32_to_cpu(lad->extLength) >> 30; |
1826 | *eloc = lelb_to_cpu(lad->extLocation); | |
1827 | *elen = le32_to_cpu(lad->extLength) & UDF_EXTENT_LENGTH_MASK; | |
1828 | break; | |
1829 | default: | |
1830 | udf_debug("alloc_type = %d unsupported\n", UDF_I_ALLOCTYPE(inode)); | |
1831 | return -1; | |
1da177e4 LT |
1832 | } |
1833 | ||
1834 | return etype; | |
1835 | } | |
1836 | ||
28de7948 CG |
1837 | static int8_t udf_insert_aext(struct inode *inode, struct extent_position epos, |
1838 | kernel_lb_addr neloc, uint32_t nelen) | |
1da177e4 LT |
1839 | { |
1840 | kernel_lb_addr oeloc; | |
1841 | uint32_t oelen; | |
1842 | int8_t etype; | |
1843 | ||
ff116fc8 | 1844 | if (epos.bh) |
3bf25cb4 | 1845 | get_bh(epos.bh); |
1da177e4 | 1846 | |
cb00ea35 | 1847 | while ((etype = udf_next_aext(inode, &epos, &oeloc, &oelen, 0)) != -1) { |
ff116fc8 | 1848 | udf_write_aext(inode, &epos, neloc, nelen, 1); |
1da177e4 LT |
1849 | neloc = oeloc; |
1850 | nelen = (etype << 30) | oelen; | |
1851 | } | |
ff116fc8 | 1852 | udf_add_aext(inode, &epos, neloc, nelen, 1); |
3bf25cb4 | 1853 | brelse(epos.bh); |
28de7948 | 1854 | |
1da177e4 LT |
1855 | return (nelen >> 30); |
1856 | } | |
1857 | ||
cb00ea35 CG |
1858 | int8_t udf_delete_aext(struct inode * inode, struct extent_position epos, |
1859 | kernel_lb_addr eloc, uint32_t elen) | |
1da177e4 | 1860 | { |
ff116fc8 JK |
1861 | struct extent_position oepos; |
1862 | int adsize; | |
1da177e4 LT |
1863 | int8_t etype; |
1864 | struct allocExtDesc *aed; | |
1865 | ||
cb00ea35 | 1866 | if (epos.bh) { |
3bf25cb4 JK |
1867 | get_bh(epos.bh); |
1868 | get_bh(epos.bh); | |
1da177e4 LT |
1869 | } |
1870 | ||
1871 | if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_SHORT) | |
1872 | adsize = sizeof(short_ad); | |
1873 | else if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_LONG) | |
1874 | adsize = sizeof(long_ad); | |
1875 | else | |
1876 | adsize = 0; | |
1877 | ||
ff116fc8 JK |
1878 | oepos = epos; |
1879 | if (udf_next_aext(inode, &epos, &eloc, &elen, 1) == -1) | |
1da177e4 LT |
1880 | return -1; |
1881 | ||
cb00ea35 | 1882 | while ((etype = udf_next_aext(inode, &epos, &eloc, &elen, 1)) != -1) { |
ff116fc8 | 1883 | udf_write_aext(inode, &oepos, eloc, (etype << 30) | elen, 1); |
cb00ea35 | 1884 | if (oepos.bh != epos.bh) { |
ff116fc8 | 1885 | oepos.block = epos.block; |
3bf25cb4 JK |
1886 | brelse(oepos.bh); |
1887 | get_bh(epos.bh); | |
ff116fc8 JK |
1888 | oepos.bh = epos.bh; |
1889 | oepos.offset = epos.offset - adsize; | |
1da177e4 LT |
1890 | } |
1891 | } | |
1892 | memset(&eloc, 0x00, sizeof(kernel_lb_addr)); | |
1893 | elen = 0; | |
1894 | ||
cb00ea35 | 1895 | if (epos.bh != oepos.bh) { |
ff116fc8 JK |
1896 | udf_free_blocks(inode->i_sb, inode, epos.block, 0, 1); |
1897 | udf_write_aext(inode, &oepos, eloc, elen, 1); | |
1898 | udf_write_aext(inode, &oepos, eloc, elen, 1); | |
cb00ea35 | 1899 | if (!oepos.bh) { |
1da177e4 LT |
1900 | UDF_I_LENALLOC(inode) -= (adsize * 2); |
1901 | mark_inode_dirty(inode); | |
cb00ea35 | 1902 | } else { |
ff116fc8 | 1903 | aed = (struct allocExtDesc *)oepos.bh->b_data; |
1da177e4 | 1904 | aed->lengthAllocDescs = |
28de7948 CG |
1905 | cpu_to_le32(le32_to_cpu(aed->lengthAllocDescs) - (2 * adsize)); |
1906 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || | |
1907 | UDF_SB_UDFREV(inode->i_sb) >= 0x0201) | |
1908 | udf_update_tag(oepos.bh->b_data, oepos.offset - (2 * adsize)); | |
1da177e4 | 1909 | else |
28de7948 | 1910 | udf_update_tag(oepos.bh->b_data, sizeof(struct allocExtDesc)); |
ff116fc8 | 1911 | mark_buffer_dirty_inode(oepos.bh, inode); |
1da177e4 | 1912 | } |
cb00ea35 | 1913 | } else { |
ff116fc8 | 1914 | udf_write_aext(inode, &oepos, eloc, elen, 1); |
cb00ea35 | 1915 | if (!oepos.bh) { |
1da177e4 LT |
1916 | UDF_I_LENALLOC(inode) -= adsize; |
1917 | mark_inode_dirty(inode); | |
cb00ea35 | 1918 | } else { |
ff116fc8 | 1919 | aed = (struct allocExtDesc *)oepos.bh->b_data; |
1da177e4 | 1920 | aed->lengthAllocDescs = |
28de7948 CG |
1921 | cpu_to_le32(le32_to_cpu(aed->lengthAllocDescs) - adsize); |
1922 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || | |
1923 | UDF_SB_UDFREV(inode->i_sb) >= 0x0201) | |
1924 | udf_update_tag(oepos.bh->b_data, epos.offset - adsize); | |
1da177e4 | 1925 | else |
28de7948 | 1926 | udf_update_tag(oepos.bh->b_data, sizeof(struct allocExtDesc)); |
ff116fc8 | 1927 | mark_buffer_dirty_inode(oepos.bh, inode); |
1da177e4 LT |
1928 | } |
1929 | } | |
647bd61a | 1930 | |
3bf25cb4 JK |
1931 | brelse(epos.bh); |
1932 | brelse(oepos.bh); | |
28de7948 | 1933 | |
1da177e4 LT |
1934 | return (elen >> 30); |
1935 | } | |
1936 | ||
cb00ea35 CG |
1937 | int8_t inode_bmap(struct inode * inode, sector_t block, |
1938 | struct extent_position * pos, kernel_lb_addr * eloc, | |
1939 | uint32_t * elen, sector_t * offset) | |
1da177e4 | 1940 | { |
cb00ea35 CG |
1941 | loff_t lbcount = 0, bcount = |
1942 | (loff_t) block << inode->i_sb->s_blocksize_bits; | |
1da177e4 LT |
1943 | int8_t etype; |
1944 | ||
cb00ea35 | 1945 | if (block < 0) { |
1da177e4 LT |
1946 | printk(KERN_ERR "udf: inode_bmap: block < 0\n"); |
1947 | return -1; | |
1948 | } | |
1da177e4 | 1949 | |
ff116fc8 JK |
1950 | pos->offset = 0; |
1951 | pos->block = UDF_I_LOCATION(inode); | |
1952 | pos->bh = NULL; | |
1da177e4 | 1953 | *elen = 0; |
1da177e4 | 1954 | |
cb00ea35 CG |
1955 | do { |
1956 | if ((etype = udf_next_aext(inode, pos, eloc, elen, 1)) == -1) { | |
28de7948 | 1957 | *offset = (bcount - lbcount) >> inode->i_sb->s_blocksize_bits; |
1da177e4 LT |
1958 | UDF_I_LENEXTENTS(inode) = lbcount; |
1959 | return -1; | |
1960 | } | |
1961 | lbcount += *elen; | |
1962 | } while (lbcount <= bcount); | |
1963 | ||
60448b1d | 1964 | *offset = (bcount + *elen - lbcount) >> inode->i_sb->s_blocksize_bits; |
1da177e4 LT |
1965 | |
1966 | return etype; | |
1967 | } | |
1968 | ||
60448b1d | 1969 | long udf_block_map(struct inode *inode, sector_t block) |
1da177e4 | 1970 | { |
ff116fc8 JK |
1971 | kernel_lb_addr eloc; |
1972 | uint32_t elen; | |
60448b1d | 1973 | sector_t offset; |
28de7948 | 1974 | struct extent_position epos = {}; |
1da177e4 LT |
1975 | int ret; |
1976 | ||
1977 | lock_kernel(); | |
1978 | ||
28de7948 | 1979 | if (inode_bmap(inode, block, &epos, &eloc, &elen, &offset) == (EXT_RECORDED_ALLOCATED >> 30)) |
60448b1d | 1980 | ret = udf_get_lb_pblock(inode->i_sb, eloc, offset); |
1da177e4 LT |
1981 | else |
1982 | ret = 0; | |
1983 | ||
1984 | unlock_kernel(); | |
3bf25cb4 | 1985 | brelse(epos.bh); |
1da177e4 LT |
1986 | |
1987 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_VARCONV)) | |
1988 | return udf_fixed_to_variable(ret); | |
1989 | else | |
1990 | return ret; | |
1991 | } |