Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * inode.c | |
3 | * | |
4 | * PURPOSE | |
5 | * Inode handling routines for the OSTA-UDF(tm) filesystem. | |
6 | * | |
1da177e4 LT |
7 | * COPYRIGHT |
8 | * This file is distributed under the terms of the GNU General Public | |
9 | * License (GPL). Copies of the GPL can be obtained from: | |
10 | * ftp://prep.ai.mit.edu/pub/gnu/GPL | |
11 | * Each contributing author retains all rights to their own work. | |
12 | * | |
13 | * (C) 1998 Dave Boynton | |
14 | * (C) 1998-2004 Ben Fennema | |
15 | * (C) 1999-2000 Stelias Computing Inc | |
16 | * | |
17 | * HISTORY | |
18 | * | |
19 | * 10/04/98 dgb Added rudimentary directory functions | |
20 | * 10/07/98 Fully working udf_block_map! It works! | |
21 | * 11/25/98 bmap altered to better support extents | |
4b11111a MS |
22 | * 12/06/98 blf partition support in udf_iget, udf_block_map |
23 | * and udf_read_inode | |
1da177e4 LT |
24 | * 12/12/98 rewrote udf_block_map to handle next extents and descs across |
25 | * block boundaries (which is not actually allowed) | |
26 | * 12/20/98 added support for strategy 4096 | |
27 | * 03/07/99 rewrote udf_block_map (again) | |
28 | * New funcs, inode_bmap, udf_next_aext | |
29 | * 04/19/99 Support for writing device EA's for major/minor # | |
30 | */ | |
31 | ||
32 | #include "udfdecl.h" | |
33 | #include <linux/mm.h> | |
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> | |
907f4554 | 39 | #include <linux/quotaops.h> |
1da177e4 | 40 | #include <linux/slab.h> |
f845fced | 41 | #include <linux/crc-itu-t.h> |
1da177e4 LT |
42 | |
43 | #include "udf_i.h" | |
44 | #include "udf_sb.h" | |
45 | ||
46 | MODULE_AUTHOR("Ben Fennema"); | |
47 | MODULE_DESCRIPTION("Universal Disk Format Filesystem"); | |
48 | MODULE_LICENSE("GPL"); | |
49 | ||
50 | #define EXTENT_MERGE_SIZE 5 | |
51 | ||
52 | static mode_t udf_convert_permissions(struct fileEntry *); | |
53 | static int udf_update_inode(struct inode *, int); | |
54 | static void udf_fill_inode(struct inode *, struct buffer_head *); | |
647bd61a | 55 | static int udf_alloc_i_data(struct inode *inode, size_t size); |
60448b1d | 56 | static struct buffer_head *inode_getblk(struct inode *, sector_t, int *, |
1ed16171 | 57 | sector_t *, int *); |
ff116fc8 | 58 | static int8_t udf_insert_aext(struct inode *, struct extent_position, |
5ca4e4be | 59 | struct kernel_lb_addr, uint32_t); |
1da177e4 | 60 | static void udf_split_extents(struct inode *, int *, int, int, |
5ca4e4be | 61 | struct kernel_long_ad[EXTENT_MERGE_SIZE], int *); |
1da177e4 | 62 | static void udf_prealloc_extents(struct inode *, int, int, |
5ca4e4be | 63 | struct kernel_long_ad[EXTENT_MERGE_SIZE], int *); |
1da177e4 | 64 | static void udf_merge_extents(struct inode *, |
5ca4e4be | 65 | struct kernel_long_ad[EXTENT_MERGE_SIZE], int *); |
1da177e4 | 66 | static void udf_update_extents(struct inode *, |
5ca4e4be | 67 | struct kernel_long_ad[EXTENT_MERGE_SIZE], int, int, |
cb00ea35 | 68 | struct extent_position *); |
1da177e4 LT |
69 | static int udf_get_block(struct inode *, sector_t, struct buffer_head *, int); |
70 | ||
b1e32126 | 71 | |
cb00ea35 | 72 | void udf_delete_inode(struct inode *inode) |
1da177e4 | 73 | { |
907f4554 | 74 | if (!is_bad_inode(inode)) |
871a2931 | 75 | dquot_initialize(inode); |
907f4554 | 76 | |
fef26658 MF |
77 | truncate_inode_pages(&inode->i_data, 0); |
78 | ||
1da177e4 LT |
79 | if (is_bad_inode(inode)) |
80 | goto no_delete; | |
81 | ||
82 | inode->i_size = 0; | |
83 | udf_truncate(inode); | |
84 | lock_kernel(); | |
85 | ||
86 | udf_update_inode(inode, IS_SYNC(inode)); | |
87 | udf_free_inode(inode); | |
88 | ||
89 | unlock_kernel(); | |
90 | return; | |
28de7948 CG |
91 | |
92 | no_delete: | |
1da177e4 LT |
93 | clear_inode(inode); |
94 | } | |
95 | ||
74584ae5 | 96 | /* |
81056dd0 JK |
97 | * If we are going to release inode from memory, we truncate last inode extent |
98 | * to proper length. We could use drop_inode() but it's called under inode_lock | |
99 | * and thus we cannot mark inode dirty there. We use clear_inode() but we have | |
100 | * to make sure to write inode as it's not written automatically. | |
74584ae5 | 101 | */ |
1da177e4 LT |
102 | void udf_clear_inode(struct inode *inode) |
103 | { | |
2c948b3f JK |
104 | struct udf_inode_info *iinfo = UDF_I(inode); |
105 | ||
106 | if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB && | |
107 | inode->i_size != iinfo->i_lenExtents) { | |
108 | printk(KERN_WARNING "UDF-fs (%s): Inode %lu (mode %o) has " | |
109 | "inode size %llu different from extent lenght %llu. " | |
110 | "Filesystem need not be standards compliant.\n", | |
111 | inode->i_sb->s_id, inode->i_ino, inode->i_mode, | |
112 | (unsigned long long)inode->i_size, | |
113 | (unsigned long long)iinfo->i_lenExtents); | |
1da177e4 | 114 | } |
257ba15c | 115 | |
9f754758 | 116 | dquot_drop(inode); |
48d6d8ff MS |
117 | kfree(iinfo->i_ext.i_data); |
118 | iinfo->i_ext.i_data = NULL; | |
1da177e4 LT |
119 | } |
120 | ||
121 | static int udf_writepage(struct page *page, struct writeback_control *wbc) | |
122 | { | |
123 | return block_write_full_page(page, udf_get_block, wbc); | |
124 | } | |
125 | ||
126 | static int udf_readpage(struct file *file, struct page *page) | |
127 | { | |
128 | return block_read_full_page(page, udf_get_block); | |
129 | } | |
130 | ||
be021ee4 NP |
131 | static int udf_write_begin(struct file *file, struct address_space *mapping, |
132 | loff_t pos, unsigned len, unsigned flags, | |
133 | struct page **pagep, void **fsdata) | |
1da177e4 | 134 | { |
be021ee4 NP |
135 | *pagep = NULL; |
136 | return block_write_begin(file, mapping, pos, len, flags, pagep, fsdata, | |
137 | udf_get_block); | |
1da177e4 LT |
138 | } |
139 | ||
140 | static sector_t udf_bmap(struct address_space *mapping, sector_t block) | |
141 | { | |
cb00ea35 | 142 | return generic_block_bmap(mapping, block, udf_get_block); |
1da177e4 LT |
143 | } |
144 | ||
f5e54d6e | 145 | const struct address_space_operations udf_aops = { |
28de7948 CG |
146 | .readpage = udf_readpage, |
147 | .writepage = udf_writepage, | |
148 | .sync_page = block_sync_page, | |
be021ee4 NP |
149 | .write_begin = udf_write_begin, |
150 | .write_end = generic_write_end, | |
28de7948 | 151 | .bmap = udf_bmap, |
1da177e4 LT |
152 | }; |
153 | ||
cb00ea35 | 154 | void udf_expand_file_adinicb(struct inode *inode, int newsize, int *err) |
1da177e4 LT |
155 | { |
156 | struct page *page; | |
157 | char *kaddr; | |
48d6d8ff | 158 | struct udf_inode_info *iinfo = UDF_I(inode); |
1da177e4 LT |
159 | struct writeback_control udf_wbc = { |
160 | .sync_mode = WB_SYNC_NONE, | |
161 | .nr_to_write = 1, | |
162 | }; | |
163 | ||
164 | /* from now on we have normal address_space methods */ | |
165 | inode->i_data.a_ops = &udf_aops; | |
166 | ||
48d6d8ff | 167 | if (!iinfo->i_lenAlloc) { |
1da177e4 | 168 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) |
48d6d8ff | 169 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT; |
1da177e4 | 170 | else |
48d6d8ff | 171 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG; |
1da177e4 LT |
172 | mark_inode_dirty(inode); |
173 | return; | |
174 | } | |
175 | ||
176 | page = grab_cache_page(inode->i_mapping, 0); | |
cd7619d6 MM |
177 | BUG_ON(!PageLocked(page)); |
178 | ||
cb00ea35 | 179 | if (!PageUptodate(page)) { |
1da177e4 | 180 | kaddr = kmap(page); |
48d6d8ff MS |
181 | memset(kaddr + iinfo->i_lenAlloc, 0x00, |
182 | PAGE_CACHE_SIZE - iinfo->i_lenAlloc); | |
183 | memcpy(kaddr, iinfo->i_ext.i_data + iinfo->i_lenEAttr, | |
184 | iinfo->i_lenAlloc); | |
1da177e4 LT |
185 | flush_dcache_page(page); |
186 | SetPageUptodate(page); | |
187 | kunmap(page); | |
188 | } | |
48d6d8ff MS |
189 | memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr, 0x00, |
190 | iinfo->i_lenAlloc); | |
191 | iinfo->i_lenAlloc = 0; | |
1da177e4 | 192 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) |
48d6d8ff | 193 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT; |
1da177e4 | 194 | else |
48d6d8ff | 195 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG; |
1da177e4 LT |
196 | |
197 | inode->i_data.a_ops->writepage(page, &udf_wbc); | |
198 | page_cache_release(page); | |
199 | ||
200 | mark_inode_dirty(inode); | |
201 | } | |
202 | ||
cb00ea35 CG |
203 | struct buffer_head *udf_expand_dir_adinicb(struct inode *inode, int *block, |
204 | int *err) | |
1da177e4 LT |
205 | { |
206 | int newblock; | |
ff116fc8 | 207 | struct buffer_head *dbh = NULL; |
5ca4e4be | 208 | struct kernel_lb_addr eloc; |
1da177e4 | 209 | uint8_t alloctype; |
ff116fc8 | 210 | struct extent_position epos; |
1da177e4 LT |
211 | |
212 | struct udf_fileident_bh sfibh, dfibh; | |
af793295 JK |
213 | loff_t f_pos = udf_ext0_offset(inode); |
214 | int size = udf_ext0_offset(inode) + inode->i_size; | |
1da177e4 | 215 | struct fileIdentDesc cfi, *sfi, *dfi; |
48d6d8ff | 216 | struct udf_inode_info *iinfo = UDF_I(inode); |
1da177e4 LT |
217 | |
218 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) | |
219 | alloctype = ICBTAG_FLAG_AD_SHORT; | |
220 | else | |
221 | alloctype = ICBTAG_FLAG_AD_LONG; | |
222 | ||
cb00ea35 | 223 | if (!inode->i_size) { |
48d6d8ff | 224 | iinfo->i_alloc_type = alloctype; |
1da177e4 LT |
225 | mark_inode_dirty(inode); |
226 | return NULL; | |
227 | } | |
228 | ||
229 | /* alloc block, and copy data to it */ | |
230 | *block = udf_new_block(inode->i_sb, inode, | |
48d6d8ff MS |
231 | iinfo->i_location.partitionReferenceNum, |
232 | iinfo->i_location.logicalBlockNum, err); | |
1da177e4 LT |
233 | if (!(*block)) |
234 | return NULL; | |
235 | newblock = udf_get_pblock(inode->i_sb, *block, | |
48d6d8ff | 236 | iinfo->i_location.partitionReferenceNum, |
c0b34438 | 237 | 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 | ||
4b11111a | 249 | sfibh.soffset = sfibh.eoffset = |
af793295 | 250 | f_pos & (inode->i_sb->s_blocksize - 1); |
ff116fc8 | 251 | sfibh.sbh = sfibh.ebh = NULL; |
1da177e4 LT |
252 | dfibh.soffset = dfibh.eoffset = 0; |
253 | dfibh.sbh = dfibh.ebh = dbh; | |
af793295 | 254 | while (f_pos < size) { |
48d6d8ff | 255 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB; |
4b11111a MS |
256 | sfi = udf_fileident_read(inode, &f_pos, &sfibh, &cfi, NULL, |
257 | NULL, NULL, NULL); | |
cb00ea35 | 258 | if (!sfi) { |
3bf25cb4 | 259 | brelse(dbh); |
1da177e4 LT |
260 | return NULL; |
261 | } | |
48d6d8ff | 262 | iinfo->i_alloc_type = alloctype; |
1da177e4 LT |
263 | sfi->descTag.tagLocation = cpu_to_le32(*block); |
264 | dfibh.soffset = dfibh.eoffset; | |
265 | dfibh.eoffset += (sfibh.eoffset - sfibh.soffset); | |
266 | dfi = (struct fileIdentDesc *)(dbh->b_data + dfibh.soffset); | |
267 | if (udf_write_fi(inode, sfi, dfi, &dfibh, sfi->impUse, | |
4b11111a MS |
268 | sfi->fileIdent + |
269 | le16_to_cpu(sfi->lengthOfImpUse))) { | |
48d6d8ff | 270 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB; |
3bf25cb4 | 271 | brelse(dbh); |
1da177e4 LT |
272 | return NULL; |
273 | } | |
274 | } | |
275 | mark_buffer_dirty_inode(dbh, inode); | |
276 | ||
48d6d8ff MS |
277 | memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr, 0, |
278 | iinfo->i_lenAlloc); | |
279 | iinfo->i_lenAlloc = 0; | |
1da177e4 | 280 | eloc.logicalBlockNum = *block; |
4b11111a | 281 | eloc.partitionReferenceNum = |
48d6d8ff | 282 | iinfo->i_location.partitionReferenceNum; |
2c948b3f | 283 | iinfo->i_lenExtents = inode->i_size; |
ff116fc8 | 284 | epos.bh = NULL; |
48d6d8ff | 285 | epos.block = iinfo->i_location; |
ff116fc8 | 286 | epos.offset = udf_file_entry_alloc_offset(inode); |
2c948b3f | 287 | udf_add_aext(inode, &epos, &eloc, inode->i_size, 0); |
1da177e4 LT |
288 | /* UniqueID stuff */ |
289 | ||
3bf25cb4 | 290 | brelse(epos.bh); |
1da177e4 LT |
291 | mark_inode_dirty(inode); |
292 | return dbh; | |
293 | } | |
294 | ||
cb00ea35 CG |
295 | static int udf_get_block(struct inode *inode, sector_t block, |
296 | struct buffer_head *bh_result, int create) | |
1da177e4 LT |
297 | { |
298 | int err, new; | |
299 | struct buffer_head *bh; | |
1ed16171 | 300 | sector_t phys = 0; |
48d6d8ff | 301 | struct udf_inode_info *iinfo; |
1da177e4 | 302 | |
cb00ea35 | 303 | if (!create) { |
1da177e4 LT |
304 | phys = udf_block_map(inode, block); |
305 | if (phys) | |
306 | map_bh(bh_result, inode->i_sb, phys); | |
307 | return 0; | |
308 | } | |
309 | ||
310 | err = -EIO; | |
311 | new = 0; | |
312 | bh = NULL; | |
313 | ||
314 | lock_kernel(); | |
315 | ||
48d6d8ff MS |
316 | iinfo = UDF_I(inode); |
317 | if (block == iinfo->i_next_alloc_block + 1) { | |
318 | iinfo->i_next_alloc_block++; | |
319 | iinfo->i_next_alloc_goal++; | |
1da177e4 LT |
320 | } |
321 | ||
322 | err = 0; | |
323 | ||
324 | bh = inode_getblk(inode, block, &err, &phys, &new); | |
2c2111c2 | 325 | BUG_ON(bh); |
1da177e4 LT |
326 | if (err) |
327 | goto abort; | |
2c2111c2 | 328 | BUG_ON(!phys); |
1da177e4 LT |
329 | |
330 | if (new) | |
331 | set_buffer_new(bh_result); | |
332 | map_bh(bh_result, inode->i_sb, phys); | |
28de7948 CG |
333 | |
334 | abort: | |
1da177e4 LT |
335 | unlock_kernel(); |
336 | return err; | |
1da177e4 LT |
337 | } |
338 | ||
cb00ea35 CG |
339 | static struct buffer_head *udf_getblk(struct inode *inode, long block, |
340 | int create, int *err) | |
1da177e4 | 341 | { |
28de7948 | 342 | struct buffer_head *bh; |
1da177e4 LT |
343 | struct buffer_head dummy; |
344 | ||
345 | dummy.b_state = 0; | |
346 | dummy.b_blocknr = -1000; | |
347 | *err = udf_get_block(inode, block, &dummy, create); | |
cb00ea35 | 348 | if (!*err && buffer_mapped(&dummy)) { |
1da177e4 | 349 | bh = sb_getblk(inode->i_sb, dummy.b_blocknr); |
cb00ea35 | 350 | if (buffer_new(&dummy)) { |
1da177e4 LT |
351 | lock_buffer(bh); |
352 | memset(bh->b_data, 0x00, inode->i_sb->s_blocksize); | |
353 | set_buffer_uptodate(bh); | |
354 | unlock_buffer(bh); | |
355 | mark_buffer_dirty_inode(bh, inode); | |
356 | } | |
357 | return bh; | |
358 | } | |
28de7948 | 359 | |
1da177e4 LT |
360 | return NULL; |
361 | } | |
362 | ||
31170b6a JK |
363 | /* Extend the file by 'blocks' blocks, return the number of extents added */ |
364 | int udf_extend_file(struct inode *inode, struct extent_position *last_pos, | |
5ca4e4be | 365 | struct kernel_long_ad *last_ext, sector_t blocks) |
31170b6a JK |
366 | { |
367 | sector_t add; | |
368 | int count = 0, fake = !(last_ext->extLength & UDF_EXTENT_LENGTH_MASK); | |
369 | struct super_block *sb = inode->i_sb; | |
5ca4e4be | 370 | struct kernel_lb_addr prealloc_loc = {}; |
31170b6a | 371 | int prealloc_len = 0; |
48d6d8ff | 372 | struct udf_inode_info *iinfo; |
31170b6a JK |
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 | |
48d6d8ff | 379 | iinfo = UDF_I(inode); |
31170b6a JK |
380 | /* Round the last extent up to a multiple of block size */ |
381 | if (last_ext->extLength & (sb->s_blocksize - 1)) { | |
382 | last_ext->extLength = | |
28de7948 CG |
383 | (last_ext->extLength & UDF_EXTENT_FLAG_MASK) | |
384 | (((last_ext->extLength & UDF_EXTENT_LENGTH_MASK) + | |
385 | sb->s_blocksize - 1) & ~(sb->s_blocksize - 1)); | |
48d6d8ff MS |
386 | iinfo->i_lenExtents = |
387 | (iinfo->i_lenExtents + sb->s_blocksize - 1) & | |
28de7948 | 388 | ~(sb->s_blocksize - 1); |
31170b6a | 389 | } |
28de7948 | 390 | |
31170b6a | 391 | /* Last extent are just preallocated blocks? */ |
4b11111a MS |
392 | if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) == |
393 | EXT_NOT_RECORDED_ALLOCATED) { | |
31170b6a JK |
394 | /* Save the extent so that we can reattach it to the end */ |
395 | prealloc_loc = last_ext->extLocation; | |
396 | prealloc_len = last_ext->extLength; | |
397 | /* Mark the extent as a hole */ | |
398 | last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | | |
28de7948 | 399 | (last_ext->extLength & UDF_EXTENT_LENGTH_MASK); |
31170b6a | 400 | last_ext->extLocation.logicalBlockNum = 0; |
4b11111a | 401 | last_ext->extLocation.partitionReferenceNum = 0; |
31170b6a | 402 | } |
28de7948 | 403 | |
31170b6a | 404 | /* Can we merge with the previous extent? */ |
4b11111a MS |
405 | if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) == |
406 | EXT_NOT_RECORDED_NOT_ALLOCATED) { | |
407 | add = ((1 << 30) - sb->s_blocksize - | |
408 | (last_ext->extLength & UDF_EXTENT_LENGTH_MASK)) >> | |
409 | sb->s_blocksize_bits; | |
31170b6a JK |
410 | if (add > blocks) |
411 | add = blocks; | |
412 | blocks -= add; | |
413 | last_ext->extLength += add << sb->s_blocksize_bits; | |
414 | } | |
415 | ||
416 | if (fake) { | |
97e961fd | 417 | udf_add_aext(inode, last_pos, &last_ext->extLocation, |
cb00ea35 | 418 | last_ext->extLength, 1); |
31170b6a | 419 | count++; |
4b11111a | 420 | } else |
97e961fd | 421 | udf_write_aext(inode, last_pos, &last_ext->extLocation, |
4b11111a | 422 | last_ext->extLength, 1); |
28de7948 | 423 | |
31170b6a JK |
424 | /* Managed to do everything necessary? */ |
425 | if (!blocks) | |
426 | goto out; | |
427 | ||
428 | /* All further extents will be NOT_RECORDED_NOT_ALLOCATED */ | |
429 | last_ext->extLocation.logicalBlockNum = 0; | |
4b11111a | 430 | last_ext->extLocation.partitionReferenceNum = 0; |
28de7948 | 431 | add = (1 << (30-sb->s_blocksize_bits)) - 1; |
4b11111a MS |
432 | last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | |
433 | (add << sb->s_blocksize_bits); | |
28de7948 | 434 | |
31170b6a JK |
435 | /* Create enough extents to cover the whole hole */ |
436 | while (blocks > add) { | |
437 | blocks -= add; | |
97e961fd | 438 | if (udf_add_aext(inode, last_pos, &last_ext->extLocation, |
cb00ea35 | 439 | last_ext->extLength, 1) == -1) |
31170b6a JK |
440 | return -1; |
441 | count++; | |
442 | } | |
443 | if (blocks) { | |
444 | last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | | |
28de7948 | 445 | (blocks << sb->s_blocksize_bits); |
97e961fd | 446 | if (udf_add_aext(inode, last_pos, &last_ext->extLocation, |
cb00ea35 | 447 | last_ext->extLength, 1) == -1) |
31170b6a JK |
448 | return -1; |
449 | count++; | |
450 | } | |
28de7948 CG |
451 | |
452 | out: | |
31170b6a JK |
453 | /* Do we have some preallocated blocks saved? */ |
454 | if (prealloc_len) { | |
97e961fd | 455 | if (udf_add_aext(inode, last_pos, &prealloc_loc, |
4b11111a | 456 | prealloc_len, 1) == -1) |
31170b6a JK |
457 | return -1; |
458 | last_ext->extLocation = prealloc_loc; | |
459 | last_ext->extLength = prealloc_len; | |
460 | count++; | |
461 | } | |
28de7948 | 462 | |
31170b6a | 463 | /* last_pos should point to the last written extent... */ |
48d6d8ff | 464 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
5ca4e4be | 465 | last_pos->offset -= sizeof(struct short_ad); |
48d6d8ff | 466 | else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
5ca4e4be | 467 | last_pos->offset -= sizeof(struct long_ad); |
31170b6a JK |
468 | else |
469 | return -1; | |
28de7948 | 470 | |
31170b6a JK |
471 | return count; |
472 | } | |
473 | ||
cb00ea35 | 474 | static struct buffer_head *inode_getblk(struct inode *inode, sector_t block, |
1ed16171 | 475 | int *err, sector_t *phys, int *new) |
1da177e4 | 476 | { |
31170b6a | 477 | static sector_t last_block; |
ff116fc8 | 478 | struct buffer_head *result = NULL; |
5ca4e4be | 479 | struct kernel_long_ad laarr[EXTENT_MERGE_SIZE]; |
ff116fc8 | 480 | struct extent_position prev_epos, cur_epos, next_epos; |
1da177e4 | 481 | int count = 0, startnum = 0, endnum = 0; |
85d71244 | 482 | uint32_t elen = 0, tmpelen; |
5ca4e4be | 483 | struct kernel_lb_addr eloc, tmpeloc; |
1da177e4 | 484 | int c = 1; |
60448b1d JK |
485 | loff_t lbcount = 0, b_off = 0; |
486 | uint32_t newblocknum, newblock; | |
487 | sector_t offset = 0; | |
1da177e4 | 488 | int8_t etype; |
48d6d8ff MS |
489 | struct udf_inode_info *iinfo = UDF_I(inode); |
490 | int goal = 0, pgoal = iinfo->i_location.logicalBlockNum; | |
31170b6a | 491 | int lastblock = 0; |
1da177e4 | 492 | |
ff116fc8 | 493 | prev_epos.offset = udf_file_entry_alloc_offset(inode); |
48d6d8ff | 494 | prev_epos.block = iinfo->i_location; |
ff116fc8 JK |
495 | prev_epos.bh = NULL; |
496 | cur_epos = next_epos = prev_epos; | |
28de7948 | 497 | b_off = (loff_t)block << inode->i_sb->s_blocksize_bits; |
1da177e4 LT |
498 | |
499 | /* find the extent which contains the block we are looking for. | |
cb00ea35 CG |
500 | alternate between laarr[0] and laarr[1] for locations of the |
501 | current extent, and the previous extent */ | |
502 | do { | |
503 | if (prev_epos.bh != cur_epos.bh) { | |
3bf25cb4 JK |
504 | brelse(prev_epos.bh); |
505 | get_bh(cur_epos.bh); | |
ff116fc8 | 506 | prev_epos.bh = cur_epos.bh; |
1da177e4 | 507 | } |
cb00ea35 | 508 | if (cur_epos.bh != next_epos.bh) { |
3bf25cb4 JK |
509 | brelse(cur_epos.bh); |
510 | get_bh(next_epos.bh); | |
ff116fc8 | 511 | cur_epos.bh = next_epos.bh; |
1da177e4 LT |
512 | } |
513 | ||
514 | lbcount += elen; | |
515 | ||
ff116fc8 JK |
516 | prev_epos.block = cur_epos.block; |
517 | cur_epos.block = next_epos.block; | |
1da177e4 | 518 | |
ff116fc8 JK |
519 | prev_epos.offset = cur_epos.offset; |
520 | cur_epos.offset = next_epos.offset; | |
1da177e4 | 521 | |
4b11111a MS |
522 | etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 1); |
523 | if (etype == -1) | |
1da177e4 LT |
524 | break; |
525 | ||
526 | c = !c; | |
527 | ||
528 | laarr[c].extLength = (etype << 30) | elen; | |
529 | laarr[c].extLocation = eloc; | |
530 | ||
531 | if (etype != (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) | |
532 | pgoal = eloc.logicalBlockNum + | |
28de7948 CG |
533 | ((elen + inode->i_sb->s_blocksize - 1) >> |
534 | inode->i_sb->s_blocksize_bits); | |
1da177e4 | 535 | |
cb00ea35 | 536 | count++; |
1da177e4 LT |
537 | } while (lbcount + elen <= b_off); |
538 | ||
539 | b_off -= lbcount; | |
540 | offset = b_off >> inode->i_sb->s_blocksize_bits; | |
85d71244 JK |
541 | /* |
542 | * Move prev_epos and cur_epos into indirect extent if we are at | |
543 | * the pointer to it | |
544 | */ | |
545 | udf_next_aext(inode, &prev_epos, &tmpeloc, &tmpelen, 0); | |
546 | udf_next_aext(inode, &cur_epos, &tmpeloc, &tmpelen, 0); | |
1da177e4 LT |
547 | |
548 | /* if the extent is allocated and recorded, return the block | |
cb00ea35 | 549 | if the extent is not a multiple of the blocksize, round up */ |
1da177e4 | 550 | |
cb00ea35 CG |
551 | if (etype == (EXT_RECORDED_ALLOCATED >> 30)) { |
552 | if (elen & (inode->i_sb->s_blocksize - 1)) { | |
1da177e4 | 553 | elen = EXT_RECORDED_ALLOCATED | |
28de7948 CG |
554 | ((elen + inode->i_sb->s_blocksize - 1) & |
555 | ~(inode->i_sb->s_blocksize - 1)); | |
97e961fd | 556 | etype = udf_write_aext(inode, &cur_epos, &eloc, elen, 1); |
1da177e4 | 557 | } |
3bf25cb4 JK |
558 | brelse(prev_epos.bh); |
559 | brelse(cur_epos.bh); | |
560 | brelse(next_epos.bh); | |
97e961fd | 561 | newblock = udf_get_lb_pblock(inode->i_sb, &eloc, offset); |
1da177e4 LT |
562 | *phys = newblock; |
563 | return NULL; | |
564 | } | |
565 | ||
31170b6a JK |
566 | last_block = block; |
567 | /* Are we beyond EOF? */ | |
cb00ea35 | 568 | if (etype == -1) { |
31170b6a JK |
569 | int ret; |
570 | ||
571 | if (count) { | |
572 | if (c) | |
573 | laarr[0] = laarr[1]; | |
574 | startnum = 1; | |
cb00ea35 | 575 | } else { |
31170b6a | 576 | /* Create a fake extent when there's not one */ |
4b11111a | 577 | memset(&laarr[0].extLocation, 0x00, |
5ca4e4be | 578 | sizeof(struct kernel_lb_addr)); |
31170b6a | 579 | laarr[0].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED; |
4b11111a MS |
580 | /* Will udf_extend_file() create real extent from |
581 | a fake one? */ | |
31170b6a JK |
582 | startnum = (offset > 0); |
583 | } | |
584 | /* Create extents for the hole between EOF and offset */ | |
585 | ret = udf_extend_file(inode, &prev_epos, laarr, offset); | |
586 | if (ret == -1) { | |
587 | brelse(prev_epos.bh); | |
588 | brelse(cur_epos.bh); | |
589 | brelse(next_epos.bh); | |
590 | /* We don't really know the error here so we just make | |
591 | * something up */ | |
592 | *err = -ENOSPC; | |
593 | return NULL; | |
594 | } | |
595 | c = 0; | |
596 | offset = 0; | |
597 | count += ret; | |
598 | /* We are not covered by a preallocated extent? */ | |
4b11111a MS |
599 | if ((laarr[0].extLength & UDF_EXTENT_FLAG_MASK) != |
600 | EXT_NOT_RECORDED_ALLOCATED) { | |
31170b6a JK |
601 | /* Is there any real extent? - otherwise we overwrite |
602 | * the fake one... */ | |
603 | if (count) | |
604 | c = !c; | |
605 | laarr[c].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | | |
28de7948 | 606 | inode->i_sb->s_blocksize; |
4b11111a | 607 | memset(&laarr[c].extLocation, 0x00, |
5ca4e4be | 608 | sizeof(struct kernel_lb_addr)); |
cb00ea35 CG |
609 | count++; |
610 | endnum++; | |
31170b6a | 611 | } |
cb00ea35 | 612 | endnum = c + 1; |
1da177e4 | 613 | lastblock = 1; |
cb00ea35 | 614 | } else { |
1da177e4 LT |
615 | endnum = startnum = ((count > 2) ? 2 : count); |
616 | ||
4b11111a MS |
617 | /* if the current extent is in position 0, |
618 | swap it with the previous */ | |
cb00ea35 | 619 | if (!c && count != 1) { |
31170b6a JK |
620 | laarr[2] = laarr[0]; |
621 | laarr[0] = laarr[1]; | |
622 | laarr[1] = laarr[2]; | |
623 | c = 1; | |
624 | } | |
1da177e4 | 625 | |
4b11111a MS |
626 | /* if the current block is located in an extent, |
627 | read the next extent */ | |
628 | etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 0); | |
629 | if (etype != -1) { | |
cb00ea35 CG |
630 | laarr[c + 1].extLength = (etype << 30) | elen; |
631 | laarr[c + 1].extLocation = eloc; | |
632 | count++; | |
633 | startnum++; | |
634 | endnum++; | |
4b11111a | 635 | } else |
1da177e4 LT |
636 | lastblock = 1; |
637 | } | |
1da177e4 LT |
638 | |
639 | /* if the current extent is not recorded but allocated, get the | |
28de7948 | 640 | * block in the extent corresponding to the requested block */ |
4b11111a | 641 | if ((laarr[c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30)) |
1da177e4 | 642 | newblocknum = laarr[c].extLocation.logicalBlockNum + offset; |
4b11111a | 643 | else { /* otherwise, allocate a new block */ |
48d6d8ff MS |
644 | if (iinfo->i_next_alloc_block == block) |
645 | goal = iinfo->i_next_alloc_goal; | |
1da177e4 | 646 | |
cb00ea35 | 647 | if (!goal) { |
4b11111a | 648 | if (!(goal = pgoal)) /* XXX: what was intended here? */ |
48d6d8ff | 649 | goal = iinfo->i_location.logicalBlockNum + 1; |
1da177e4 LT |
650 | } |
651 | ||
4b11111a | 652 | newblocknum = udf_new_block(inode->i_sb, inode, |
48d6d8ff | 653 | iinfo->i_location.partitionReferenceNum, |
4b11111a MS |
654 | goal, err); |
655 | if (!newblocknum) { | |
3bf25cb4 | 656 | brelse(prev_epos.bh); |
1da177e4 LT |
657 | *err = -ENOSPC; |
658 | return NULL; | |
659 | } | |
48d6d8ff | 660 | iinfo->i_lenExtents += inode->i_sb->s_blocksize; |
1da177e4 LT |
661 | } |
662 | ||
4b11111a MS |
663 | /* if the extent the requsted block is located in contains multiple |
664 | * blocks, split the extent into at most three extents. blocks prior | |
665 | * to requested block, requested block, and blocks after requested | |
666 | * block */ | |
1da177e4 LT |
667 | udf_split_extents(inode, &c, offset, newblocknum, laarr, &endnum); |
668 | ||
669 | #ifdef UDF_PREALLOCATE | |
81056dd0 JK |
670 | /* We preallocate blocks only for regular files. It also makes sense |
671 | * for directories but there's a problem when to drop the | |
672 | * preallocation. We might use some delayed work for that but I feel | |
673 | * it's overengineering for a filesystem like UDF. */ | |
674 | if (S_ISREG(inode->i_mode)) | |
675 | udf_prealloc_extents(inode, c, lastblock, laarr, &endnum); | |
1da177e4 LT |
676 | #endif |
677 | ||
678 | /* merge any continuous blocks in laarr */ | |
679 | udf_merge_extents(inode, laarr, &endnum); | |
680 | ||
681 | /* write back the new extents, inserting new extents if the new number | |
28de7948 CG |
682 | * of extents is greater than the old number, and deleting extents if |
683 | * the new number of extents is less than the old number */ | |
ff116fc8 | 684 | udf_update_extents(inode, laarr, startnum, endnum, &prev_epos); |
1da177e4 | 685 | |
3bf25cb4 | 686 | brelse(prev_epos.bh); |
1da177e4 | 687 | |
4b11111a | 688 | newblock = udf_get_pblock(inode->i_sb, newblocknum, |
48d6d8ff | 689 | iinfo->i_location.partitionReferenceNum, 0); |
4b11111a | 690 | if (!newblock) |
1da177e4 | 691 | return NULL; |
1da177e4 LT |
692 | *phys = newblock; |
693 | *err = 0; | |
694 | *new = 1; | |
48d6d8ff MS |
695 | iinfo->i_next_alloc_block = block; |
696 | iinfo->i_next_alloc_goal = newblocknum; | |
1da177e4 LT |
697 | inode->i_ctime = current_fs_time(inode->i_sb); |
698 | ||
699 | if (IS_SYNC(inode)) | |
700 | udf_sync_inode(inode); | |
701 | else | |
702 | mark_inode_dirty(inode); | |
28de7948 | 703 | |
1da177e4 LT |
704 | return result; |
705 | } | |
706 | ||
cb00ea35 CG |
707 | static void udf_split_extents(struct inode *inode, int *c, int offset, |
708 | int newblocknum, | |
5ca4e4be | 709 | struct kernel_long_ad laarr[EXTENT_MERGE_SIZE], |
cb00ea35 | 710 | int *endnum) |
1da177e4 | 711 | { |
4b11111a MS |
712 | unsigned long blocksize = inode->i_sb->s_blocksize; |
713 | unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; | |
714 | ||
1da177e4 | 715 | if ((laarr[*c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30) || |
4b11111a MS |
716 | (laarr[*c].extLength >> 30) == |
717 | (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) { | |
1da177e4 LT |
718 | int curr = *c; |
719 | int blen = ((laarr[curr].extLength & UDF_EXTENT_LENGTH_MASK) + | |
4b11111a | 720 | blocksize - 1) >> blocksize_bits; |
1da177e4 LT |
721 | int8_t etype = (laarr[curr].extLength >> 30); |
722 | ||
4b11111a | 723 | if (blen == 1) |
28de7948 | 724 | ; |
4b11111a | 725 | else if (!offset || blen == offset + 1) { |
cb00ea35 CG |
726 | laarr[curr + 2] = laarr[curr + 1]; |
727 | laarr[curr + 1] = laarr[curr]; | |
728 | } else { | |
729 | laarr[curr + 3] = laarr[curr + 1]; | |
730 | laarr[curr + 2] = laarr[curr + 1] = laarr[curr]; | |
731 | } | |
732 | ||
733 | if (offset) { | |
734 | if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30)) { | |
4b11111a | 735 | udf_free_blocks(inode->i_sb, inode, |
97e961fd | 736 | &laarr[curr].extLocation, |
4b11111a MS |
737 | 0, offset); |
738 | laarr[curr].extLength = | |
739 | EXT_NOT_RECORDED_NOT_ALLOCATED | | |
740 | (offset << blocksize_bits); | |
1da177e4 | 741 | laarr[curr].extLocation.logicalBlockNum = 0; |
4b11111a MS |
742 | laarr[curr].extLocation. |
743 | partitionReferenceNum = 0; | |
744 | } else | |
1da177e4 | 745 | laarr[curr].extLength = (etype << 30) | |
4b11111a | 746 | (offset << blocksize_bits); |
cb00ea35 CG |
747 | curr++; |
748 | (*c)++; | |
749 | (*endnum)++; | |
1da177e4 | 750 | } |
647bd61a | 751 | |
1da177e4 LT |
752 | laarr[curr].extLocation.logicalBlockNum = newblocknum; |
753 | if (etype == (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) | |
754 | laarr[curr].extLocation.partitionReferenceNum = | |
c0b34438 | 755 | UDF_I(inode)->i_location.partitionReferenceNum; |
1da177e4 | 756 | laarr[curr].extLength = EXT_RECORDED_ALLOCATED | |
4b11111a | 757 | blocksize; |
cb00ea35 | 758 | curr++; |
1da177e4 | 759 | |
cb00ea35 | 760 | if (blen != offset + 1) { |
1da177e4 | 761 | if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30)) |
4b11111a MS |
762 | laarr[curr].extLocation.logicalBlockNum += |
763 | offset + 1; | |
28de7948 | 764 | laarr[curr].extLength = (etype << 30) | |
4b11111a | 765 | ((blen - (offset + 1)) << blocksize_bits); |
cb00ea35 CG |
766 | curr++; |
767 | (*endnum)++; | |
1da177e4 LT |
768 | } |
769 | } | |
770 | } | |
771 | ||
772 | static void udf_prealloc_extents(struct inode *inode, int c, int lastblock, | |
5ca4e4be | 773 | struct kernel_long_ad laarr[EXTENT_MERGE_SIZE], |
cb00ea35 | 774 | int *endnum) |
1da177e4 LT |
775 | { |
776 | int start, length = 0, currlength = 0, i; | |
777 | ||
cb00ea35 | 778 | if (*endnum >= (c + 1)) { |
1da177e4 LT |
779 | if (!lastblock) |
780 | return; | |
781 | else | |
782 | start = c; | |
cb00ea35 | 783 | } else { |
4b11111a MS |
784 | if ((laarr[c + 1].extLength >> 30) == |
785 | (EXT_NOT_RECORDED_ALLOCATED >> 30)) { | |
cb00ea35 | 786 | start = c + 1; |
4b11111a MS |
787 | length = currlength = |
788 | (((laarr[c + 1].extLength & | |
789 | UDF_EXTENT_LENGTH_MASK) + | |
790 | inode->i_sb->s_blocksize - 1) >> | |
791 | inode->i_sb->s_blocksize_bits); | |
792 | } else | |
1da177e4 LT |
793 | start = c; |
794 | } | |
795 | ||
cb00ea35 CG |
796 | for (i = start + 1; i <= *endnum; i++) { |
797 | if (i == *endnum) { | |
1da177e4 LT |
798 | if (lastblock) |
799 | length += UDF_DEFAULT_PREALLOC_BLOCKS; | |
4b11111a MS |
800 | } else if ((laarr[i].extLength >> 30) == |
801 | (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) { | |
802 | length += (((laarr[i].extLength & | |
803 | UDF_EXTENT_LENGTH_MASK) + | |
804 | inode->i_sb->s_blocksize - 1) >> | |
805 | inode->i_sb->s_blocksize_bits); | |
806 | } else | |
1da177e4 LT |
807 | break; |
808 | } | |
809 | ||
cb00ea35 | 810 | if (length) { |
1da177e4 | 811 | int next = laarr[start].extLocation.logicalBlockNum + |
28de7948 | 812 | (((laarr[start].extLength & UDF_EXTENT_LENGTH_MASK) + |
4b11111a MS |
813 | inode->i_sb->s_blocksize - 1) >> |
814 | inode->i_sb->s_blocksize_bits); | |
1da177e4 | 815 | int numalloc = udf_prealloc_blocks(inode->i_sb, inode, |
4b11111a MS |
816 | laarr[start].extLocation.partitionReferenceNum, |
817 | next, (UDF_DEFAULT_PREALLOC_BLOCKS > length ? | |
818 | length : UDF_DEFAULT_PREALLOC_BLOCKS) - | |
819 | currlength); | |
28de7948 | 820 | if (numalloc) { |
4b11111a | 821 | if (start == (c + 1)) |
1da177e4 | 822 | laarr[start].extLength += |
4b11111a MS |
823 | (numalloc << |
824 | inode->i_sb->s_blocksize_bits); | |
825 | else { | |
cb00ea35 | 826 | memmove(&laarr[c + 2], &laarr[c + 1], |
5ca4e4be | 827 | sizeof(struct long_ad) * (*endnum - (c + 1))); |
cb00ea35 CG |
828 | (*endnum)++; |
829 | laarr[c + 1].extLocation.logicalBlockNum = next; | |
830 | laarr[c + 1].extLocation.partitionReferenceNum = | |
4b11111a MS |
831 | laarr[c].extLocation. |
832 | partitionReferenceNum; | |
833 | laarr[c + 1].extLength = | |
834 | EXT_NOT_RECORDED_ALLOCATED | | |
835 | (numalloc << | |
836 | inode->i_sb->s_blocksize_bits); | |
cb00ea35 | 837 | start = c + 1; |
1da177e4 LT |
838 | } |
839 | ||
cb00ea35 | 840 | for (i = start + 1; numalloc && i < *endnum; i++) { |
4b11111a MS |
841 | int elen = ((laarr[i].extLength & |
842 | UDF_EXTENT_LENGTH_MASK) + | |
843 | inode->i_sb->s_blocksize - 1) >> | |
844 | inode->i_sb->s_blocksize_bits; | |
1da177e4 | 845 | |
cb00ea35 | 846 | if (elen > numalloc) { |
1da177e4 | 847 | laarr[i].extLength -= |
4b11111a MS |
848 | (numalloc << |
849 | inode->i_sb->s_blocksize_bits); | |
1da177e4 | 850 | numalloc = 0; |
cb00ea35 | 851 | } else { |
1da177e4 | 852 | numalloc -= elen; |
cb00ea35 | 853 | if (*endnum > (i + 1)) |
4b11111a MS |
854 | memmove(&laarr[i], |
855 | &laarr[i + 1], | |
5ca4e4be | 856 | sizeof(struct long_ad) * |
4b11111a | 857 | (*endnum - (i + 1))); |
cb00ea35 CG |
858 | i--; |
859 | (*endnum)--; | |
1da177e4 LT |
860 | } |
861 | } | |
c0b34438 | 862 | UDF_I(inode)->i_lenExtents += |
4b11111a | 863 | numalloc << inode->i_sb->s_blocksize_bits; |
1da177e4 LT |
864 | } |
865 | } | |
866 | } | |
867 | ||
868 | static void udf_merge_extents(struct inode *inode, | |
5ca4e4be | 869 | struct kernel_long_ad laarr[EXTENT_MERGE_SIZE], |
cb00ea35 | 870 | int *endnum) |
1da177e4 LT |
871 | { |
872 | int i; | |
4b11111a MS |
873 | unsigned long blocksize = inode->i_sb->s_blocksize; |
874 | unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; | |
1da177e4 | 875 | |
cb00ea35 | 876 | for (i = 0; i < (*endnum - 1); i++) { |
5ca4e4be PE |
877 | struct kernel_long_ad *li /*l[i]*/ = &laarr[i]; |
878 | struct kernel_long_ad *lip1 /*l[i plus 1]*/ = &laarr[i + 1]; | |
4b11111a MS |
879 | |
880 | if (((li->extLength >> 30) == (lip1->extLength >> 30)) && | |
881 | (((li->extLength >> 30) == | |
882 | (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) || | |
883 | ((lip1->extLocation.logicalBlockNum - | |
884 | li->extLocation.logicalBlockNum) == | |
885 | (((li->extLength & UDF_EXTENT_LENGTH_MASK) + | |
886 | blocksize - 1) >> blocksize_bits)))) { | |
887 | ||
888 | if (((li->extLength & UDF_EXTENT_LENGTH_MASK) + | |
889 | (lip1->extLength & UDF_EXTENT_LENGTH_MASK) + | |
890 | blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) { | |
891 | lip1->extLength = (lip1->extLength - | |
892 | (li->extLength & | |
893 | UDF_EXTENT_LENGTH_MASK) + | |
894 | UDF_EXTENT_LENGTH_MASK) & | |
895 | ~(blocksize - 1); | |
896 | li->extLength = (li->extLength & | |
897 | UDF_EXTENT_FLAG_MASK) + | |
898 | (UDF_EXTENT_LENGTH_MASK + 1) - | |
899 | blocksize; | |
900 | lip1->extLocation.logicalBlockNum = | |
901 | li->extLocation.logicalBlockNum + | |
902 | ((li->extLength & | |
903 | UDF_EXTENT_LENGTH_MASK) >> | |
904 | blocksize_bits); | |
905 | } else { | |
906 | li->extLength = lip1->extLength + | |
907 | (((li->extLength & | |
908 | UDF_EXTENT_LENGTH_MASK) + | |
909 | blocksize - 1) & ~(blocksize - 1)); | |
910 | if (*endnum > (i + 2)) | |
911 | memmove(&laarr[i + 1], &laarr[i + 2], | |
5ca4e4be | 912 | sizeof(struct long_ad) * |
4b11111a MS |
913 | (*endnum - (i + 2))); |
914 | i--; | |
915 | (*endnum)--; | |
1da177e4 | 916 | } |
4b11111a MS |
917 | } else if (((li->extLength >> 30) == |
918 | (EXT_NOT_RECORDED_ALLOCATED >> 30)) && | |
919 | ((lip1->extLength >> 30) == | |
920 | (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))) { | |
97e961fd | 921 | udf_free_blocks(inode->i_sb, inode, &li->extLocation, 0, |
4b11111a MS |
922 | ((li->extLength & |
923 | UDF_EXTENT_LENGTH_MASK) + | |
924 | blocksize - 1) >> blocksize_bits); | |
925 | li->extLocation.logicalBlockNum = 0; | |
926 | li->extLocation.partitionReferenceNum = 0; | |
927 | ||
928 | if (((li->extLength & UDF_EXTENT_LENGTH_MASK) + | |
929 | (lip1->extLength & UDF_EXTENT_LENGTH_MASK) + | |
930 | blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) { | |
931 | lip1->extLength = (lip1->extLength - | |
932 | (li->extLength & | |
933 | UDF_EXTENT_LENGTH_MASK) + | |
934 | UDF_EXTENT_LENGTH_MASK) & | |
935 | ~(blocksize - 1); | |
936 | li->extLength = (li->extLength & | |
937 | UDF_EXTENT_FLAG_MASK) + | |
938 | (UDF_EXTENT_LENGTH_MASK + 1) - | |
939 | blocksize; | |
cb00ea35 | 940 | } else { |
4b11111a MS |
941 | li->extLength = lip1->extLength + |
942 | (((li->extLength & | |
943 | UDF_EXTENT_LENGTH_MASK) + | |
944 | blocksize - 1) & ~(blocksize - 1)); | |
cb00ea35 CG |
945 | if (*endnum > (i + 2)) |
946 | memmove(&laarr[i + 1], &laarr[i + 2], | |
5ca4e4be | 947 | sizeof(struct long_ad) * |
4b11111a | 948 | (*endnum - (i + 2))); |
cb00ea35 CG |
949 | i--; |
950 | (*endnum)--; | |
1da177e4 | 951 | } |
4b11111a MS |
952 | } else if ((li->extLength >> 30) == |
953 | (EXT_NOT_RECORDED_ALLOCATED >> 30)) { | |
954 | udf_free_blocks(inode->i_sb, inode, | |
97e961fd | 955 | &li->extLocation, 0, |
4b11111a MS |
956 | ((li->extLength & |
957 | UDF_EXTENT_LENGTH_MASK) + | |
958 | blocksize - 1) >> blocksize_bits); | |
959 | li->extLocation.logicalBlockNum = 0; | |
960 | li->extLocation.partitionReferenceNum = 0; | |
961 | li->extLength = (li->extLength & | |
962 | UDF_EXTENT_LENGTH_MASK) | | |
963 | EXT_NOT_RECORDED_NOT_ALLOCATED; | |
1da177e4 LT |
964 | } |
965 | } | |
966 | } | |
967 | ||
968 | static void udf_update_extents(struct inode *inode, | |
5ca4e4be | 969 | struct kernel_long_ad laarr[EXTENT_MERGE_SIZE], |
cb00ea35 CG |
970 | int startnum, int endnum, |
971 | struct extent_position *epos) | |
1da177e4 LT |
972 | { |
973 | int start = 0, i; | |
5ca4e4be | 974 | struct kernel_lb_addr tmploc; |
1da177e4 LT |
975 | uint32_t tmplen; |
976 | ||
cb00ea35 CG |
977 | if (startnum > endnum) { |
978 | for (i = 0; i < (startnum - endnum); i++) | |
ff116fc8 | 979 | udf_delete_aext(inode, *epos, laarr[i].extLocation, |
cb00ea35 CG |
980 | laarr[i].extLength); |
981 | } else if (startnum < endnum) { | |
982 | for (i = 0; i < (endnum - startnum); i++) { | |
ff116fc8 | 983 | udf_insert_aext(inode, *epos, laarr[i].extLocation, |
cb00ea35 | 984 | laarr[i].extLength); |
ff116fc8 | 985 | udf_next_aext(inode, epos, &laarr[i].extLocation, |
cb00ea35 CG |
986 | &laarr[i].extLength, 1); |
987 | start++; | |
1da177e4 LT |
988 | } |
989 | } | |
990 | ||
cb00ea35 | 991 | for (i = start; i < endnum; i++) { |
ff116fc8 | 992 | udf_next_aext(inode, epos, &tmploc, &tmplen, 0); |
97e961fd | 993 | udf_write_aext(inode, epos, &laarr[i].extLocation, |
cb00ea35 | 994 | laarr[i].extLength, 1); |
1da177e4 LT |
995 | } |
996 | } | |
997 | ||
cb00ea35 CG |
998 | struct buffer_head *udf_bread(struct inode *inode, int block, |
999 | int create, int *err) | |
1da177e4 | 1000 | { |
cb00ea35 | 1001 | struct buffer_head *bh = NULL; |
1da177e4 LT |
1002 | |
1003 | bh = udf_getblk(inode, block, create, err); | |
1004 | if (!bh) | |
1005 | return NULL; | |
1006 | ||
1007 | if (buffer_uptodate(bh)) | |
1008 | return bh; | |
28de7948 | 1009 | |
1da177e4 | 1010 | ll_rw_block(READ, 1, &bh); |
28de7948 | 1011 | |
1da177e4 LT |
1012 | wait_on_buffer(bh); |
1013 | if (buffer_uptodate(bh)) | |
1014 | return bh; | |
28de7948 | 1015 | |
1da177e4 LT |
1016 | brelse(bh); |
1017 | *err = -EIO; | |
1018 | return NULL; | |
1019 | } | |
1020 | ||
cb00ea35 | 1021 | void udf_truncate(struct inode *inode) |
1da177e4 LT |
1022 | { |
1023 | int offset; | |
1024 | int err; | |
48d6d8ff | 1025 | struct udf_inode_info *iinfo; |
1da177e4 LT |
1026 | |
1027 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || | |
cb00ea35 | 1028 | S_ISLNK(inode->i_mode))) |
1da177e4 LT |
1029 | return; |
1030 | if (IS_APPEND(inode) || IS_IMMUTABLE(inode)) | |
1031 | return; | |
1032 | ||
1033 | lock_kernel(); | |
48d6d8ff MS |
1034 | iinfo = UDF_I(inode); |
1035 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { | |
4b11111a MS |
1036 | if (inode->i_sb->s_blocksize < |
1037 | (udf_file_entry_alloc_offset(inode) + | |
1038 | inode->i_size)) { | |
1da177e4 | 1039 | udf_expand_file_adinicb(inode, inode->i_size, &err); |
48d6d8ff MS |
1040 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { |
1041 | inode->i_size = iinfo->i_lenAlloc; | |
1da177e4 LT |
1042 | unlock_kernel(); |
1043 | return; | |
4b11111a | 1044 | } else |
1da177e4 | 1045 | udf_truncate_extents(inode); |
cb00ea35 | 1046 | } else { |
1da177e4 | 1047 | offset = inode->i_size & (inode->i_sb->s_blocksize - 1); |
48d6d8ff | 1048 | memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr + offset, |
c0b34438 | 1049 | 0x00, inode->i_sb->s_blocksize - |
4b11111a | 1050 | offset - udf_file_entry_alloc_offset(inode)); |
48d6d8ff | 1051 | iinfo->i_lenAlloc = inode->i_size; |
1da177e4 | 1052 | } |
cb00ea35 | 1053 | } else { |
4b11111a MS |
1054 | block_truncate_page(inode->i_mapping, inode->i_size, |
1055 | udf_get_block); | |
1da177e4 | 1056 | udf_truncate_extents(inode); |
647bd61a | 1057 | } |
1da177e4 LT |
1058 | |
1059 | inode->i_mtime = inode->i_ctime = current_fs_time(inode->i_sb); | |
1060 | if (IS_SYNC(inode)) | |
cb00ea35 | 1061 | udf_sync_inode(inode); |
1da177e4 LT |
1062 | else |
1063 | mark_inode_dirty(inode); | |
1064 | unlock_kernel(); | |
1065 | } | |
1066 | ||
cb00ea35 | 1067 | static void __udf_read_inode(struct inode *inode) |
1da177e4 LT |
1068 | { |
1069 | struct buffer_head *bh = NULL; | |
1070 | struct fileEntry *fe; | |
1071 | uint16_t ident; | |
48d6d8ff | 1072 | struct udf_inode_info *iinfo = UDF_I(inode); |
1da177e4 LT |
1073 | |
1074 | /* | |
1075 | * Set defaults, but the inode is still incomplete! | |
1076 | * Note: get_new_inode() sets the following on a new inode: | |
1077 | * i_sb = sb | |
1078 | * i_no = ino | |
1079 | * i_flags = sb->s_flags | |
1080 | * i_state = 0 | |
1081 | * clean_inode(): zero fills and sets | |
1082 | * i_count = 1 | |
1083 | * i_nlink = 1 | |
1084 | * i_op = NULL; | |
1085 | */ | |
97e961fd | 1086 | bh = udf_read_ptagged(inode->i_sb, &iinfo->i_location, 0, &ident); |
cb00ea35 | 1087 | if (!bh) { |
1da177e4 | 1088 | printk(KERN_ERR "udf: udf_read_inode(ino %ld) failed !bh\n", |
cb00ea35 | 1089 | inode->i_ino); |
1da177e4 LT |
1090 | make_bad_inode(inode); |
1091 | return; | |
1092 | } | |
1093 | ||
1094 | if (ident != TAG_IDENT_FE && ident != TAG_IDENT_EFE && | |
cb00ea35 | 1095 | ident != TAG_IDENT_USE) { |
4b11111a MS |
1096 | printk(KERN_ERR "udf: udf_read_inode(ino %ld) " |
1097 | "failed ident=%d\n", inode->i_ino, ident); | |
3bf25cb4 | 1098 | brelse(bh); |
1da177e4 LT |
1099 | make_bad_inode(inode); |
1100 | return; | |
1101 | } | |
1102 | ||
1103 | fe = (struct fileEntry *)bh->b_data; | |
1104 | ||
5e0f0017 | 1105 | if (fe->icbTag.strategyType == cpu_to_le16(4096)) { |
1ab92785 | 1106 | struct buffer_head *ibh; |
1da177e4 | 1107 | |
97e961fd | 1108 | ibh = udf_read_ptagged(inode->i_sb, &iinfo->i_location, 1, |
4b11111a | 1109 | &ident); |
1ab92785 | 1110 | if (ident == TAG_IDENT_IE && ibh) { |
1111 | struct buffer_head *nbh = NULL; | |
5ca4e4be | 1112 | struct kernel_lb_addr loc; |
1ab92785 | 1113 | struct indirectEntry *ie; |
1114 | ||
1115 | ie = (struct indirectEntry *)ibh->b_data; | |
1116 | loc = lelb_to_cpu(ie->indirectICB.extLocation); | |
1117 | ||
1118 | if (ie->indirectICB.extLength && | |
97e961fd | 1119 | (nbh = udf_read_ptagged(inode->i_sb, &loc, 0, |
1ab92785 | 1120 | &ident))) { |
1121 | if (ident == TAG_IDENT_FE || | |
1122 | ident == TAG_IDENT_EFE) { | |
1123 | memcpy(&iinfo->i_location, | |
1124 | &loc, | |
5ca4e4be | 1125 | sizeof(struct kernel_lb_addr)); |
1ab92785 | 1126 | brelse(bh); |
3bf25cb4 | 1127 | brelse(ibh); |
1ab92785 | 1128 | brelse(nbh); |
1129 | __udf_read_inode(inode); | |
1130 | return; | |
28de7948 | 1131 | } |
1ab92785 | 1132 | brelse(nbh); |
1da177e4 | 1133 | } |
28de7948 | 1134 | } |
1ab92785 | 1135 | brelse(ibh); |
5e0f0017 | 1136 | } else if (fe->icbTag.strategyType != cpu_to_le16(4)) { |
1da177e4 | 1137 | printk(KERN_ERR "udf: unsupported strategy type: %d\n", |
cb00ea35 | 1138 | le16_to_cpu(fe->icbTag.strategyType)); |
3bf25cb4 | 1139 | brelse(bh); |
1da177e4 LT |
1140 | make_bad_inode(inode); |
1141 | return; | |
1142 | } | |
1143 | udf_fill_inode(inode, bh); | |
31170b6a | 1144 | |
3bf25cb4 | 1145 | brelse(bh); |
1da177e4 LT |
1146 | } |
1147 | ||
1148 | static void udf_fill_inode(struct inode *inode, struct buffer_head *bh) | |
1149 | { | |
1150 | struct fileEntry *fe; | |
1151 | struct extendedFileEntry *efe; | |
1da177e4 | 1152 | int offset; |
6c79e987 | 1153 | struct udf_sb_info *sbi = UDF_SB(inode->i_sb); |
48d6d8ff | 1154 | struct udf_inode_info *iinfo = UDF_I(inode); |
1da177e4 LT |
1155 | |
1156 | fe = (struct fileEntry *)bh->b_data; | |
1157 | efe = (struct extendedFileEntry *)bh->b_data; | |
1158 | ||
5e0f0017 | 1159 | if (fe->icbTag.strategyType == cpu_to_le16(4)) |
48d6d8ff | 1160 | iinfo->i_strat4096 = 0; |
5e0f0017 | 1161 | else /* if (fe->icbTag.strategyType == cpu_to_le16(4096)) */ |
48d6d8ff | 1162 | iinfo->i_strat4096 = 1; |
1da177e4 | 1163 | |
48d6d8ff | 1164 | iinfo->i_alloc_type = le16_to_cpu(fe->icbTag.flags) & |
4b11111a | 1165 | ICBTAG_FLAG_AD_MASK; |
48d6d8ff MS |
1166 | iinfo->i_unique = 0; |
1167 | iinfo->i_lenEAttr = 0; | |
1168 | iinfo->i_lenExtents = 0; | |
1169 | iinfo->i_lenAlloc = 0; | |
1170 | iinfo->i_next_alloc_block = 0; | |
1171 | iinfo->i_next_alloc_goal = 0; | |
5e0f0017 | 1172 | if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_EFE)) { |
48d6d8ff MS |
1173 | iinfo->i_efe = 1; |
1174 | iinfo->i_use = 0; | |
4b11111a MS |
1175 | if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize - |
1176 | sizeof(struct extendedFileEntry))) { | |
647bd61a CG |
1177 | make_bad_inode(inode); |
1178 | return; | |
1179 | } | |
48d6d8ff | 1180 | memcpy(iinfo->i_ext.i_data, |
4b11111a MS |
1181 | bh->b_data + sizeof(struct extendedFileEntry), |
1182 | inode->i_sb->s_blocksize - | |
1183 | sizeof(struct extendedFileEntry)); | |
5e0f0017 | 1184 | } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_FE)) { |
48d6d8ff MS |
1185 | iinfo->i_efe = 0; |
1186 | iinfo->i_use = 0; | |
4b11111a MS |
1187 | if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize - |
1188 | sizeof(struct fileEntry))) { | |
647bd61a CG |
1189 | make_bad_inode(inode); |
1190 | return; | |
1191 | } | |
48d6d8ff | 1192 | memcpy(iinfo->i_ext.i_data, |
c0b34438 | 1193 | bh->b_data + sizeof(struct fileEntry), |
cb00ea35 | 1194 | inode->i_sb->s_blocksize - sizeof(struct fileEntry)); |
5e0f0017 | 1195 | } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_USE)) { |
48d6d8ff MS |
1196 | iinfo->i_efe = 0; |
1197 | iinfo->i_use = 1; | |
1198 | iinfo->i_lenAlloc = le32_to_cpu( | |
4b11111a MS |
1199 | ((struct unallocSpaceEntry *)bh->b_data)-> |
1200 | lengthAllocDescs); | |
1201 | if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize - | |
1202 | sizeof(struct unallocSpaceEntry))) { | |
647bd61a CG |
1203 | make_bad_inode(inode); |
1204 | return; | |
1205 | } | |
48d6d8ff | 1206 | memcpy(iinfo->i_ext.i_data, |
4b11111a MS |
1207 | bh->b_data + sizeof(struct unallocSpaceEntry), |
1208 | inode->i_sb->s_blocksize - | |
1209 | sizeof(struct unallocSpaceEntry)); | |
1da177e4 LT |
1210 | return; |
1211 | } | |
1212 | ||
1213 | inode->i_uid = le32_to_cpu(fe->uid); | |
ca76d2d8 CG |
1214 | if (inode->i_uid == -1 || |
1215 | UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_IGNORE) || | |
1216 | UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_SET)) | |
4d6660eb | 1217 | inode->i_uid = UDF_SB(inode->i_sb)->s_uid; |
1da177e4 LT |
1218 | |
1219 | inode->i_gid = le32_to_cpu(fe->gid); | |
ca76d2d8 CG |
1220 | if (inode->i_gid == -1 || |
1221 | UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_IGNORE) || | |
1222 | UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_SET)) | |
4d6660eb | 1223 | inode->i_gid = UDF_SB(inode->i_sb)->s_gid; |
1da177e4 LT |
1224 | |
1225 | inode->i_nlink = le16_to_cpu(fe->fileLinkCount); | |
1226 | if (!inode->i_nlink) | |
1227 | inode->i_nlink = 1; | |
647bd61a | 1228 | |
1da177e4 | 1229 | inode->i_size = le64_to_cpu(fe->informationLength); |
48d6d8ff | 1230 | iinfo->i_lenExtents = inode->i_size; |
1da177e4 | 1231 | |
7ac9bcd5 | 1232 | if (fe->icbTag.fileType != ICBTAG_FILE_TYPE_DIRECTORY && |
87bc730c | 1233 | sbi->s_fmode != UDF_INVALID_MODE) |
7ac9bcd5 MS |
1234 | inode->i_mode = sbi->s_fmode; |
1235 | else if (fe->icbTag.fileType == ICBTAG_FILE_TYPE_DIRECTORY && | |
87bc730c | 1236 | sbi->s_dmode != UDF_INVALID_MODE) |
7ac9bcd5 MS |
1237 | inode->i_mode = sbi->s_dmode; |
1238 | else | |
1239 | inode->i_mode = udf_convert_permissions(fe); | |
1240 | inode->i_mode &= ~sbi->s_umask; | |
1da177e4 | 1241 | |
48d6d8ff | 1242 | if (iinfo->i_efe == 0) { |
1da177e4 | 1243 | inode->i_blocks = le64_to_cpu(fe->logicalBlocksRecorded) << |
28de7948 | 1244 | (inode->i_sb->s_blocksize_bits - 9); |
1da177e4 | 1245 | |
56774805 | 1246 | if (!udf_disk_stamp_to_time(&inode->i_atime, fe->accessTime)) |
cbf5676a | 1247 | inode->i_atime = sbi->s_record_time; |
1248 | ||
56774805 MS |
1249 | if (!udf_disk_stamp_to_time(&inode->i_mtime, |
1250 | fe->modificationTime)) | |
cbf5676a | 1251 | inode->i_mtime = sbi->s_record_time; |
1252 | ||
56774805 | 1253 | if (!udf_disk_stamp_to_time(&inode->i_ctime, fe->attrTime)) |
cbf5676a | 1254 | inode->i_ctime = sbi->s_record_time; |
1da177e4 | 1255 | |
48d6d8ff MS |
1256 | iinfo->i_unique = le64_to_cpu(fe->uniqueID); |
1257 | iinfo->i_lenEAttr = le32_to_cpu(fe->lengthExtendedAttr); | |
1258 | iinfo->i_lenAlloc = le32_to_cpu(fe->lengthAllocDescs); | |
1259 | offset = sizeof(struct fileEntry) + iinfo->i_lenEAttr; | |
cb00ea35 | 1260 | } else { |
647bd61a | 1261 | inode->i_blocks = le64_to_cpu(efe->logicalBlocksRecorded) << |
cb00ea35 | 1262 | (inode->i_sb->s_blocksize_bits - 9); |
1da177e4 | 1263 | |
56774805 | 1264 | if (!udf_disk_stamp_to_time(&inode->i_atime, efe->accessTime)) |
cbf5676a | 1265 | inode->i_atime = sbi->s_record_time; |
1266 | ||
56774805 MS |
1267 | if (!udf_disk_stamp_to_time(&inode->i_mtime, |
1268 | efe->modificationTime)) | |
cbf5676a | 1269 | inode->i_mtime = sbi->s_record_time; |
1270 | ||
56774805 | 1271 | if (!udf_disk_stamp_to_time(&iinfo->i_crtime, efe->createTime)) |
cbf5676a | 1272 | iinfo->i_crtime = sbi->s_record_time; |
1273 | ||
56774805 | 1274 | if (!udf_disk_stamp_to_time(&inode->i_ctime, efe->attrTime)) |
cbf5676a | 1275 | inode->i_ctime = sbi->s_record_time; |
1da177e4 | 1276 | |
48d6d8ff MS |
1277 | iinfo->i_unique = le64_to_cpu(efe->uniqueID); |
1278 | iinfo->i_lenEAttr = le32_to_cpu(efe->lengthExtendedAttr); | |
1279 | iinfo->i_lenAlloc = le32_to_cpu(efe->lengthAllocDescs); | |
4b11111a | 1280 | offset = sizeof(struct extendedFileEntry) + |
48d6d8ff | 1281 | iinfo->i_lenEAttr; |
1da177e4 LT |
1282 | } |
1283 | ||
cb00ea35 CG |
1284 | switch (fe->icbTag.fileType) { |
1285 | case ICBTAG_FILE_TYPE_DIRECTORY: | |
28de7948 CG |
1286 | inode->i_op = &udf_dir_inode_operations; |
1287 | inode->i_fop = &udf_dir_operations; | |
1288 | inode->i_mode |= S_IFDIR; | |
1289 | inc_nlink(inode); | |
1290 | break; | |
cb00ea35 CG |
1291 | case ICBTAG_FILE_TYPE_REALTIME: |
1292 | case ICBTAG_FILE_TYPE_REGULAR: | |
1293 | case ICBTAG_FILE_TYPE_UNDEF: | |
742e1795 | 1294 | case ICBTAG_FILE_TYPE_VAT20: |
48d6d8ff | 1295 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
28de7948 CG |
1296 | inode->i_data.a_ops = &udf_adinicb_aops; |
1297 | else | |
1298 | inode->i_data.a_ops = &udf_aops; | |
1299 | inode->i_op = &udf_file_inode_operations; | |
1300 | inode->i_fop = &udf_file_operations; | |
1301 | inode->i_mode |= S_IFREG; | |
1302 | break; | |
cb00ea35 | 1303 | case ICBTAG_FILE_TYPE_BLOCK: |
28de7948 CG |
1304 | inode->i_mode |= S_IFBLK; |
1305 | break; | |
cb00ea35 | 1306 | case ICBTAG_FILE_TYPE_CHAR: |
28de7948 CG |
1307 | inode->i_mode |= S_IFCHR; |
1308 | break; | |
cb00ea35 | 1309 | case ICBTAG_FILE_TYPE_FIFO: |
28de7948 CG |
1310 | init_special_inode(inode, inode->i_mode | S_IFIFO, 0); |
1311 | break; | |
cb00ea35 | 1312 | case ICBTAG_FILE_TYPE_SOCKET: |
28de7948 CG |
1313 | init_special_inode(inode, inode->i_mode | S_IFSOCK, 0); |
1314 | break; | |
cb00ea35 | 1315 | case ICBTAG_FILE_TYPE_SYMLINK: |
28de7948 CG |
1316 | inode->i_data.a_ops = &udf_symlink_aops; |
1317 | inode->i_op = &page_symlink_inode_operations; | |
1318 | inode->i_mode = S_IFLNK | S_IRWXUGO; | |
1319 | break; | |
bfb257a5 JK |
1320 | case ICBTAG_FILE_TYPE_MAIN: |
1321 | udf_debug("METADATA FILE-----\n"); | |
1322 | break; | |
1323 | case ICBTAG_FILE_TYPE_MIRROR: | |
1324 | udf_debug("METADATA MIRROR FILE-----\n"); | |
1325 | break; | |
1326 | case ICBTAG_FILE_TYPE_BITMAP: | |
1327 | udf_debug("METADATA BITMAP FILE-----\n"); | |
1328 | break; | |
cb00ea35 | 1329 | default: |
4b11111a MS |
1330 | printk(KERN_ERR "udf: udf_fill_inode(ino %ld) failed unknown " |
1331 | "file type=%d\n", inode->i_ino, | |
1332 | fe->icbTag.fileType); | |
28de7948 CG |
1333 | make_bad_inode(inode); |
1334 | return; | |
1da177e4 | 1335 | } |
cb00ea35 | 1336 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { |
4b11111a MS |
1337 | struct deviceSpec *dsea = |
1338 | (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1); | |
cb00ea35 CG |
1339 | if (dsea) { |
1340 | init_special_inode(inode, inode->i_mode, | |
4b11111a MS |
1341 | MKDEV(le32_to_cpu(dsea->majorDeviceIdent), |
1342 | le32_to_cpu(dsea->minorDeviceIdent))); | |
1da177e4 | 1343 | /* Developer ID ??? */ |
4b11111a | 1344 | } else |
1da177e4 | 1345 | make_bad_inode(inode); |
1da177e4 LT |
1346 | } |
1347 | } | |
1348 | ||
647bd61a CG |
1349 | static int udf_alloc_i_data(struct inode *inode, size_t size) |
1350 | { | |
48d6d8ff MS |
1351 | struct udf_inode_info *iinfo = UDF_I(inode); |
1352 | iinfo->i_ext.i_data = kmalloc(size, GFP_KERNEL); | |
647bd61a | 1353 | |
48d6d8ff | 1354 | if (!iinfo->i_ext.i_data) { |
4b11111a MS |
1355 | printk(KERN_ERR "udf:udf_alloc_i_data (ino %ld) " |
1356 | "no free memory\n", inode->i_ino); | |
647bd61a CG |
1357 | return -ENOMEM; |
1358 | } | |
1359 | ||
1360 | return 0; | |
1361 | } | |
1362 | ||
cb00ea35 | 1363 | static mode_t udf_convert_permissions(struct fileEntry *fe) |
1da177e4 LT |
1364 | { |
1365 | mode_t mode; | |
1366 | uint32_t permissions; | |
1367 | uint32_t flags; | |
1368 | ||
1369 | permissions = le32_to_cpu(fe->permissions); | |
1370 | flags = le16_to_cpu(fe->icbTag.flags); | |
1371 | ||
4b11111a MS |
1372 | mode = ((permissions) & S_IRWXO) | |
1373 | ((permissions >> 2) & S_IRWXG) | | |
1374 | ((permissions >> 4) & S_IRWXU) | | |
1375 | ((flags & ICBTAG_FLAG_SETUID) ? S_ISUID : 0) | | |
1376 | ((flags & ICBTAG_FLAG_SETGID) ? S_ISGID : 0) | | |
1377 | ((flags & ICBTAG_FLAG_STICKY) ? S_ISVTX : 0); | |
1da177e4 LT |
1378 | |
1379 | return mode; | |
1380 | } | |
1381 | ||
cb00ea35 | 1382 | int udf_write_inode(struct inode *inode, int sync) |
1da177e4 LT |
1383 | { |
1384 | int ret; | |
28de7948 | 1385 | |
1da177e4 LT |
1386 | lock_kernel(); |
1387 | ret = udf_update_inode(inode, sync); | |
1388 | unlock_kernel(); | |
28de7948 | 1389 | |
1da177e4 LT |
1390 | return ret; |
1391 | } | |
1392 | ||
cb00ea35 | 1393 | int udf_sync_inode(struct inode *inode) |
1da177e4 LT |
1394 | { |
1395 | return udf_update_inode(inode, 1); | |
1396 | } | |
1397 | ||
cb00ea35 | 1398 | static int udf_update_inode(struct inode *inode, int do_sync) |
1da177e4 LT |
1399 | { |
1400 | struct buffer_head *bh = NULL; | |
1401 | struct fileEntry *fe; | |
1402 | struct extendedFileEntry *efe; | |
1403 | uint32_t udfperms; | |
1404 | uint16_t icbflags; | |
1405 | uint16_t crclen; | |
1da177e4 | 1406 | int err = 0; |
6c79e987 | 1407 | struct udf_sb_info *sbi = UDF_SB(inode->i_sb); |
4b11111a | 1408 | unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; |
48d6d8ff | 1409 | struct udf_inode_info *iinfo = UDF_I(inode); |
1da177e4 | 1410 | |
4b11111a MS |
1411 | bh = udf_tread(inode->i_sb, |
1412 | udf_get_lb_pblock(inode->i_sb, | |
97e961fd | 1413 | &iinfo->i_location, 0)); |
cb00ea35 | 1414 | if (!bh) { |
1da177e4 LT |
1415 | udf_debug("bread failure\n"); |
1416 | return -EIO; | |
1417 | } | |
1418 | ||
1419 | memset(bh->b_data, 0x00, inode->i_sb->s_blocksize); | |
1420 | ||
1421 | fe = (struct fileEntry *)bh->b_data; | |
1422 | efe = (struct extendedFileEntry *)bh->b_data; | |
1423 | ||
5e0f0017 | 1424 | if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_USE)) { |
1da177e4 | 1425 | struct unallocSpaceEntry *use = |
28de7948 | 1426 | (struct unallocSpaceEntry *)bh->b_data; |
1da177e4 | 1427 | |
48d6d8ff | 1428 | use->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc); |
4b11111a | 1429 | memcpy(bh->b_data + sizeof(struct unallocSpaceEntry), |
48d6d8ff | 1430 | iinfo->i_ext.i_data, inode->i_sb->s_blocksize - |
4b11111a MS |
1431 | sizeof(struct unallocSpaceEntry)); |
1432 | crclen = sizeof(struct unallocSpaceEntry) + | |
5ca4e4be | 1433 | iinfo->i_lenAlloc - sizeof(struct tag); |
4b11111a | 1434 | use->descTag.tagLocation = cpu_to_le32( |
48d6d8ff | 1435 | iinfo->i_location. |
4b11111a | 1436 | logicalBlockNum); |
1da177e4 | 1437 | use->descTag.descCRCLength = cpu_to_le16(crclen); |
f845fced | 1438 | use->descTag.descCRC = cpu_to_le16(crc_itu_t(0, (char *)use + |
5ca4e4be | 1439 | sizeof(struct tag), |
f845fced | 1440 | crclen)); |
3f2587bb | 1441 | use->descTag.tagChecksum = udf_tag_checksum(&use->descTag); |
1da177e4 LT |
1442 | |
1443 | mark_buffer_dirty(bh); | |
3bf25cb4 | 1444 | brelse(bh); |
1da177e4 LT |
1445 | return err; |
1446 | } | |
1447 | ||
4d6660eb PS |
1448 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_FORGET)) |
1449 | fe->uid = cpu_to_le32(-1); | |
cb00ea35 CG |
1450 | else |
1451 | fe->uid = cpu_to_le32(inode->i_uid); | |
1da177e4 | 1452 | |
4d6660eb PS |
1453 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_FORGET)) |
1454 | fe->gid = cpu_to_le32(-1); | |
cb00ea35 CG |
1455 | else |
1456 | fe->gid = cpu_to_le32(inode->i_gid); | |
1da177e4 | 1457 | |
4b11111a MS |
1458 | udfperms = ((inode->i_mode & S_IRWXO)) | |
1459 | ((inode->i_mode & S_IRWXG) << 2) | | |
1460 | ((inode->i_mode & S_IRWXU) << 4); | |
1da177e4 | 1461 | |
4b11111a MS |
1462 | udfperms |= (le32_to_cpu(fe->permissions) & |
1463 | (FE_PERM_O_DELETE | FE_PERM_O_CHATTR | | |
1464 | FE_PERM_G_DELETE | FE_PERM_G_CHATTR | | |
1465 | FE_PERM_U_DELETE | FE_PERM_U_CHATTR)); | |
1da177e4 LT |
1466 | fe->permissions = cpu_to_le32(udfperms); |
1467 | ||
1468 | if (S_ISDIR(inode->i_mode)) | |
1469 | fe->fileLinkCount = cpu_to_le16(inode->i_nlink - 1); | |
1470 | else | |
1471 | fe->fileLinkCount = cpu_to_le16(inode->i_nlink); | |
1472 | ||
1473 | fe->informationLength = cpu_to_le64(inode->i_size); | |
1474 | ||
cb00ea35 | 1475 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { |
5ca4e4be | 1476 | struct regid *eid; |
28de7948 CG |
1477 | struct deviceSpec *dsea = |
1478 | (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1); | |
cb00ea35 | 1479 | if (!dsea) { |
1da177e4 | 1480 | dsea = (struct deviceSpec *) |
28de7948 CG |
1481 | udf_add_extendedattr(inode, |
1482 | sizeof(struct deviceSpec) + | |
5ca4e4be | 1483 | sizeof(struct regid), 12, 0x3); |
1da177e4 LT |
1484 | dsea->attrType = cpu_to_le32(12); |
1485 | dsea->attrSubtype = 1; | |
4b11111a MS |
1486 | dsea->attrLength = cpu_to_le32( |
1487 | sizeof(struct deviceSpec) + | |
5ca4e4be PE |
1488 | sizeof(struct regid)); |
1489 | dsea->impUseLength = cpu_to_le32(sizeof(struct regid)); | |
1da177e4 | 1490 | } |
5ca4e4be PE |
1491 | eid = (struct regid *)dsea->impUse; |
1492 | memset(eid, 0, sizeof(struct regid)); | |
1da177e4 LT |
1493 | strcpy(eid->ident, UDF_ID_DEVELOPER); |
1494 | eid->identSuffix[0] = UDF_OS_CLASS_UNIX; | |
1495 | eid->identSuffix[1] = UDF_OS_ID_LINUX; | |
1496 | dsea->majorDeviceIdent = cpu_to_le32(imajor(inode)); | |
1497 | dsea->minorDeviceIdent = cpu_to_le32(iminor(inode)); | |
1498 | } | |
1499 | ||
48d6d8ff | 1500 | if (iinfo->i_efe == 0) { |
c0b34438 | 1501 | memcpy(bh->b_data + sizeof(struct fileEntry), |
48d6d8ff | 1502 | iinfo->i_ext.i_data, |
cb00ea35 | 1503 | inode->i_sb->s_blocksize - sizeof(struct fileEntry)); |
28de7948 | 1504 | fe->logicalBlocksRecorded = cpu_to_le64( |
4b11111a MS |
1505 | (inode->i_blocks + (1 << (blocksize_bits - 9)) - 1) >> |
1506 | (blocksize_bits - 9)); | |
1da177e4 | 1507 | |
56774805 MS |
1508 | udf_time_to_disk_stamp(&fe->accessTime, inode->i_atime); |
1509 | udf_time_to_disk_stamp(&fe->modificationTime, inode->i_mtime); | |
1510 | udf_time_to_disk_stamp(&fe->attrTime, inode->i_ctime); | |
5ca4e4be | 1511 | memset(&(fe->impIdent), 0, sizeof(struct regid)); |
1da177e4 LT |
1512 | strcpy(fe->impIdent.ident, UDF_ID_DEVELOPER); |
1513 | fe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; | |
1514 | fe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; | |
48d6d8ff MS |
1515 | fe->uniqueID = cpu_to_le64(iinfo->i_unique); |
1516 | fe->lengthExtendedAttr = cpu_to_le32(iinfo->i_lenEAttr); | |
1517 | fe->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc); | |
1da177e4 LT |
1518 | fe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_FE); |
1519 | crclen = sizeof(struct fileEntry); | |
cb00ea35 | 1520 | } else { |
4b11111a | 1521 | memcpy(bh->b_data + sizeof(struct extendedFileEntry), |
48d6d8ff | 1522 | iinfo->i_ext.i_data, |
4b11111a MS |
1523 | inode->i_sb->s_blocksize - |
1524 | sizeof(struct extendedFileEntry)); | |
1da177e4 | 1525 | efe->objectSize = cpu_to_le64(inode->i_size); |
28de7948 | 1526 | efe->logicalBlocksRecorded = cpu_to_le64( |
4b11111a MS |
1527 | (inode->i_blocks + (1 << (blocksize_bits - 9)) - 1) >> |
1528 | (blocksize_bits - 9)); | |
1da177e4 | 1529 | |
48d6d8ff MS |
1530 | if (iinfo->i_crtime.tv_sec > inode->i_atime.tv_sec || |
1531 | (iinfo->i_crtime.tv_sec == inode->i_atime.tv_sec && | |
1532 | iinfo->i_crtime.tv_nsec > inode->i_atime.tv_nsec)) | |
1533 | iinfo->i_crtime = inode->i_atime; | |
4b11111a | 1534 | |
48d6d8ff MS |
1535 | if (iinfo->i_crtime.tv_sec > inode->i_mtime.tv_sec || |
1536 | (iinfo->i_crtime.tv_sec == inode->i_mtime.tv_sec && | |
1537 | iinfo->i_crtime.tv_nsec > inode->i_mtime.tv_nsec)) | |
1538 | iinfo->i_crtime = inode->i_mtime; | |
4b11111a | 1539 | |
48d6d8ff MS |
1540 | if (iinfo->i_crtime.tv_sec > inode->i_ctime.tv_sec || |
1541 | (iinfo->i_crtime.tv_sec == inode->i_ctime.tv_sec && | |
1542 | iinfo->i_crtime.tv_nsec > inode->i_ctime.tv_nsec)) | |
1543 | iinfo->i_crtime = inode->i_ctime; | |
1da177e4 | 1544 | |
56774805 MS |
1545 | udf_time_to_disk_stamp(&efe->accessTime, inode->i_atime); |
1546 | udf_time_to_disk_stamp(&efe->modificationTime, inode->i_mtime); | |
1547 | udf_time_to_disk_stamp(&efe->createTime, iinfo->i_crtime); | |
1548 | udf_time_to_disk_stamp(&efe->attrTime, inode->i_ctime); | |
1da177e4 | 1549 | |
5ca4e4be | 1550 | memset(&(efe->impIdent), 0, sizeof(struct regid)); |
1da177e4 LT |
1551 | strcpy(efe->impIdent.ident, UDF_ID_DEVELOPER); |
1552 | efe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; | |
1553 | efe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; | |
48d6d8ff MS |
1554 | efe->uniqueID = cpu_to_le64(iinfo->i_unique); |
1555 | efe->lengthExtendedAttr = cpu_to_le32(iinfo->i_lenEAttr); | |
1556 | efe->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc); | |
1da177e4 LT |
1557 | efe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_EFE); |
1558 | crclen = sizeof(struct extendedFileEntry); | |
1559 | } | |
48d6d8ff | 1560 | if (iinfo->i_strat4096) { |
1da177e4 LT |
1561 | fe->icbTag.strategyType = cpu_to_le16(4096); |
1562 | fe->icbTag.strategyParameter = cpu_to_le16(1); | |
1563 | fe->icbTag.numEntries = cpu_to_le16(2); | |
cb00ea35 | 1564 | } else { |
1da177e4 LT |
1565 | fe->icbTag.strategyType = cpu_to_le16(4); |
1566 | fe->icbTag.numEntries = cpu_to_le16(1); | |
1567 | } | |
1568 | ||
1569 | if (S_ISDIR(inode->i_mode)) | |
1570 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_DIRECTORY; | |
1571 | else if (S_ISREG(inode->i_mode)) | |
1572 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_REGULAR; | |
1573 | else if (S_ISLNK(inode->i_mode)) | |
1574 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_SYMLINK; | |
1575 | else if (S_ISBLK(inode->i_mode)) | |
1576 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_BLOCK; | |
1577 | else if (S_ISCHR(inode->i_mode)) | |
1578 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_CHAR; | |
1579 | else if (S_ISFIFO(inode->i_mode)) | |
1580 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_FIFO; | |
1581 | else if (S_ISSOCK(inode->i_mode)) | |
1582 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_SOCKET; | |
1583 | ||
48d6d8ff | 1584 | icbflags = iinfo->i_alloc_type | |
28de7948 CG |
1585 | ((inode->i_mode & S_ISUID) ? ICBTAG_FLAG_SETUID : 0) | |
1586 | ((inode->i_mode & S_ISGID) ? ICBTAG_FLAG_SETGID : 0) | | |
1587 | ((inode->i_mode & S_ISVTX) ? ICBTAG_FLAG_STICKY : 0) | | |
1588 | (le16_to_cpu(fe->icbTag.flags) & | |
1589 | ~(ICBTAG_FLAG_AD_MASK | ICBTAG_FLAG_SETUID | | |
1590 | ICBTAG_FLAG_SETGID | ICBTAG_FLAG_STICKY)); | |
1da177e4 LT |
1591 | |
1592 | fe->icbTag.flags = cpu_to_le16(icbflags); | |
6c79e987 | 1593 | if (sbi->s_udfrev >= 0x0200) |
1da177e4 LT |
1594 | fe->descTag.descVersion = cpu_to_le16(3); |
1595 | else | |
1596 | fe->descTag.descVersion = cpu_to_le16(2); | |
6c79e987 | 1597 | fe->descTag.tagSerialNum = cpu_to_le16(sbi->s_serial_number); |
4b11111a | 1598 | fe->descTag.tagLocation = cpu_to_le32( |
48d6d8ff MS |
1599 | iinfo->i_location.logicalBlockNum); |
1600 | crclen += iinfo->i_lenEAttr + iinfo->i_lenAlloc - | |
5ca4e4be | 1601 | sizeof(struct tag); |
1da177e4 | 1602 | fe->descTag.descCRCLength = cpu_to_le16(crclen); |
5ca4e4be | 1603 | fe->descTag.descCRC = cpu_to_le16(crc_itu_t(0, (char *)fe + sizeof(struct tag), |
f845fced | 1604 | crclen)); |
3f2587bb | 1605 | fe->descTag.tagChecksum = udf_tag_checksum(&fe->descTag); |
1da177e4 LT |
1606 | |
1607 | /* write the data blocks */ | |
1608 | mark_buffer_dirty(bh); | |
cb00ea35 | 1609 | if (do_sync) { |
1da177e4 | 1610 | sync_dirty_buffer(bh); |
cb00ea35 | 1611 | if (buffer_req(bh) && !buffer_uptodate(bh)) { |
4b11111a MS |
1612 | printk(KERN_WARNING "IO error syncing udf inode " |
1613 | "[%s:%08lx]\n", inode->i_sb->s_id, | |
1614 | inode->i_ino); | |
1da177e4 LT |
1615 | err = -EIO; |
1616 | } | |
1617 | } | |
3bf25cb4 | 1618 | brelse(bh); |
28de7948 | 1619 | |
1da177e4 LT |
1620 | return err; |
1621 | } | |
1622 | ||
97e961fd | 1623 | struct inode *udf_iget(struct super_block *sb, struct kernel_lb_addr *ino) |
1da177e4 LT |
1624 | { |
1625 | unsigned long block = udf_get_lb_pblock(sb, ino, 0); | |
1626 | struct inode *inode = iget_locked(sb, block); | |
1627 | ||
1628 | if (!inode) | |
1629 | return NULL; | |
1630 | ||
1631 | if (inode->i_state & I_NEW) { | |
97e961fd | 1632 | memcpy(&UDF_I(inode)->i_location, ino, sizeof(struct kernel_lb_addr)); |
1da177e4 LT |
1633 | __udf_read_inode(inode); |
1634 | unlock_new_inode(inode); | |
1635 | } | |
1636 | ||
1637 | if (is_bad_inode(inode)) | |
1638 | goto out_iput; | |
1639 | ||
97e961fd PE |
1640 | if (ino->logicalBlockNum >= UDF_SB(sb)-> |
1641 | s_partmaps[ino->partitionReferenceNum].s_partition_len) { | |
1da177e4 | 1642 | udf_debug("block=%d, partition=%d out of range\n", |
97e961fd | 1643 | ino->logicalBlockNum, ino->partitionReferenceNum); |
1da177e4 LT |
1644 | make_bad_inode(inode); |
1645 | goto out_iput; | |
1646 | } | |
1647 | ||
1648 | return inode; | |
1649 | ||
28de7948 | 1650 | out_iput: |
1da177e4 LT |
1651 | iput(inode); |
1652 | return NULL; | |
1653 | } | |
1654 | ||
4b11111a | 1655 | int8_t udf_add_aext(struct inode *inode, struct extent_position *epos, |
97e961fd | 1656 | struct kernel_lb_addr *eloc, uint32_t elen, int inc) |
1da177e4 LT |
1657 | { |
1658 | int adsize; | |
5ca4e4be PE |
1659 | struct short_ad *sad = NULL; |
1660 | struct long_ad *lad = NULL; | |
1da177e4 LT |
1661 | struct allocExtDesc *aed; |
1662 | int8_t etype; | |
1663 | uint8_t *ptr; | |
48d6d8ff | 1664 | struct udf_inode_info *iinfo = UDF_I(inode); |
1da177e4 | 1665 | |
ff116fc8 | 1666 | if (!epos->bh) |
48d6d8ff | 1667 | ptr = iinfo->i_ext.i_data + epos->offset - |
4b11111a | 1668 | udf_file_entry_alloc_offset(inode) + |
48d6d8ff | 1669 | iinfo->i_lenEAttr; |
1da177e4 | 1670 | else |
ff116fc8 | 1671 | ptr = epos->bh->b_data + epos->offset; |
1da177e4 | 1672 | |
48d6d8ff | 1673 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
5ca4e4be | 1674 | adsize = sizeof(struct short_ad); |
48d6d8ff | 1675 | else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
5ca4e4be | 1676 | adsize = sizeof(struct long_ad); |
1da177e4 LT |
1677 | else |
1678 | return -1; | |
1679 | ||
cb00ea35 | 1680 | if (epos->offset + (2 * adsize) > inode->i_sb->s_blocksize) { |
1da177e4 LT |
1681 | char *sptr, *dptr; |
1682 | struct buffer_head *nbh; | |
1683 | int err, loffset; | |
5ca4e4be | 1684 | struct kernel_lb_addr obloc = epos->block; |
1da177e4 | 1685 | |
4b11111a MS |
1686 | epos->block.logicalBlockNum = udf_new_block(inode->i_sb, NULL, |
1687 | obloc.partitionReferenceNum, | |
1688 | obloc.logicalBlockNum, &err); | |
1689 | if (!epos->block.logicalBlockNum) | |
1da177e4 | 1690 | return -1; |
4b11111a | 1691 | nbh = udf_tgetblk(inode->i_sb, udf_get_lb_pblock(inode->i_sb, |
97e961fd | 1692 | &epos->block, |
4b11111a MS |
1693 | 0)); |
1694 | if (!nbh) | |
1da177e4 | 1695 | return -1; |
1da177e4 LT |
1696 | lock_buffer(nbh); |
1697 | memset(nbh->b_data, 0x00, inode->i_sb->s_blocksize); | |
1698 | set_buffer_uptodate(nbh); | |
1699 | unlock_buffer(nbh); | |
1700 | mark_buffer_dirty_inode(nbh, inode); | |
1701 | ||
1702 | aed = (struct allocExtDesc *)(nbh->b_data); | |
1703 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT)) | |
4b11111a MS |
1704 | aed->previousAllocExtLocation = |
1705 | cpu_to_le32(obloc.logicalBlockNum); | |
cb00ea35 | 1706 | if (epos->offset + adsize > inode->i_sb->s_blocksize) { |
ff116fc8 | 1707 | loffset = epos->offset; |
1da177e4 LT |
1708 | aed->lengthAllocDescs = cpu_to_le32(adsize); |
1709 | sptr = ptr - adsize; | |
1710 | dptr = nbh->b_data + sizeof(struct allocExtDesc); | |
1711 | memcpy(dptr, sptr, adsize); | |
ff116fc8 | 1712 | epos->offset = sizeof(struct allocExtDesc) + adsize; |
cb00ea35 | 1713 | } else { |
ff116fc8 | 1714 | loffset = epos->offset + adsize; |
1da177e4 LT |
1715 | aed->lengthAllocDescs = cpu_to_le32(0); |
1716 | sptr = ptr; | |
ff116fc8 | 1717 | epos->offset = sizeof(struct allocExtDesc); |
1da177e4 | 1718 | |
cb00ea35 | 1719 | if (epos->bh) { |
ff116fc8 | 1720 | aed = (struct allocExtDesc *)epos->bh->b_data; |
c2104fda | 1721 | le32_add_cpu(&aed->lengthAllocDescs, adsize); |
cb00ea35 | 1722 | } else { |
48d6d8ff | 1723 | iinfo->i_lenAlloc += adsize; |
1da177e4 LT |
1724 | mark_inode_dirty(inode); |
1725 | } | |
1726 | } | |
6c79e987 | 1727 | if (UDF_SB(inode->i_sb)->s_udfrev >= 0x0200) |
1da177e4 | 1728 | udf_new_tag(nbh->b_data, TAG_IDENT_AED, 3, 1, |
5ca4e4be | 1729 | epos->block.logicalBlockNum, sizeof(struct tag)); |
1da177e4 LT |
1730 | else |
1731 | udf_new_tag(nbh->b_data, TAG_IDENT_AED, 2, 1, | |
5ca4e4be | 1732 | epos->block.logicalBlockNum, sizeof(struct tag)); |
48d6d8ff | 1733 | switch (iinfo->i_alloc_type) { |
cb00ea35 | 1734 | case ICBTAG_FLAG_AD_SHORT: |
5ca4e4be | 1735 | sad = (struct short_ad *)sptr; |
28de7948 CG |
1736 | sad->extLength = cpu_to_le32(EXT_NEXT_EXTENT_ALLOCDECS | |
1737 | inode->i_sb->s_blocksize); | |
4b11111a MS |
1738 | sad->extPosition = |
1739 | cpu_to_le32(epos->block.logicalBlockNum); | |
28de7948 | 1740 | break; |
cb00ea35 | 1741 | case ICBTAG_FLAG_AD_LONG: |
5ca4e4be | 1742 | lad = (struct long_ad *)sptr; |
28de7948 CG |
1743 | lad->extLength = cpu_to_le32(EXT_NEXT_EXTENT_ALLOCDECS | |
1744 | inode->i_sb->s_blocksize); | |
1745 | lad->extLocation = cpu_to_lelb(epos->block); | |
1746 | memset(lad->impUse, 0x00, sizeof(lad->impUse)); | |
1747 | break; | |
1da177e4 | 1748 | } |
cb00ea35 | 1749 | if (epos->bh) { |
28de7948 | 1750 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
6c79e987 | 1751 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) |
ff116fc8 | 1752 | udf_update_tag(epos->bh->b_data, loffset); |
1da177e4 | 1753 | else |
4b11111a MS |
1754 | udf_update_tag(epos->bh->b_data, |
1755 | sizeof(struct allocExtDesc)); | |
ff116fc8 | 1756 | mark_buffer_dirty_inode(epos->bh, inode); |
3bf25cb4 | 1757 | brelse(epos->bh); |
28de7948 | 1758 | } else { |
1da177e4 | 1759 | mark_inode_dirty(inode); |
28de7948 | 1760 | } |
ff116fc8 | 1761 | epos->bh = nbh; |
1da177e4 LT |
1762 | } |
1763 | ||
ff116fc8 | 1764 | etype = udf_write_aext(inode, epos, eloc, elen, inc); |
1da177e4 | 1765 | |
cb00ea35 | 1766 | if (!epos->bh) { |
48d6d8ff | 1767 | iinfo->i_lenAlloc += adsize; |
1da177e4 | 1768 | mark_inode_dirty(inode); |
cb00ea35 | 1769 | } else { |
ff116fc8 | 1770 | aed = (struct allocExtDesc *)epos->bh->b_data; |
c2104fda | 1771 | le32_add_cpu(&aed->lengthAllocDescs, adsize); |
4b11111a MS |
1772 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
1773 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) | |
1774 | udf_update_tag(epos->bh->b_data, | |
1775 | epos->offset + (inc ? 0 : adsize)); | |
1da177e4 | 1776 | else |
4b11111a MS |
1777 | udf_update_tag(epos->bh->b_data, |
1778 | sizeof(struct allocExtDesc)); | |
ff116fc8 | 1779 | mark_buffer_dirty_inode(epos->bh, inode); |
1da177e4 LT |
1780 | } |
1781 | ||
1782 | return etype; | |
1783 | } | |
1784 | ||
4b11111a | 1785 | int8_t udf_write_aext(struct inode *inode, struct extent_position *epos, |
97e961fd | 1786 | struct kernel_lb_addr *eloc, uint32_t elen, int inc) |
1da177e4 LT |
1787 | { |
1788 | int adsize; | |
1789 | uint8_t *ptr; | |
5ca4e4be PE |
1790 | struct short_ad *sad; |
1791 | struct long_ad *lad; | |
48d6d8ff | 1792 | struct udf_inode_info *iinfo = UDF_I(inode); |
1da177e4 | 1793 | |
ff116fc8 | 1794 | if (!epos->bh) |
48d6d8ff | 1795 | ptr = iinfo->i_ext.i_data + epos->offset - |
4b11111a | 1796 | udf_file_entry_alloc_offset(inode) + |
48d6d8ff | 1797 | iinfo->i_lenEAttr; |
1da177e4 | 1798 | else |
ff116fc8 | 1799 | ptr = epos->bh->b_data + epos->offset; |
1da177e4 | 1800 | |
48d6d8ff | 1801 | switch (iinfo->i_alloc_type) { |
cb00ea35 | 1802 | case ICBTAG_FLAG_AD_SHORT: |
5ca4e4be | 1803 | sad = (struct short_ad *)ptr; |
28de7948 | 1804 | sad->extLength = cpu_to_le32(elen); |
97e961fd | 1805 | sad->extPosition = cpu_to_le32(eloc->logicalBlockNum); |
5ca4e4be | 1806 | adsize = sizeof(struct short_ad); |
28de7948 | 1807 | break; |
cb00ea35 | 1808 | case ICBTAG_FLAG_AD_LONG: |
5ca4e4be | 1809 | lad = (struct long_ad *)ptr; |
28de7948 | 1810 | lad->extLength = cpu_to_le32(elen); |
97e961fd | 1811 | lad->extLocation = cpu_to_lelb(*eloc); |
28de7948 | 1812 | memset(lad->impUse, 0x00, sizeof(lad->impUse)); |
5ca4e4be | 1813 | adsize = sizeof(struct long_ad); |
28de7948 | 1814 | break; |
cb00ea35 CG |
1815 | default: |
1816 | return -1; | |
1da177e4 LT |
1817 | } |
1818 | ||
cb00ea35 | 1819 | if (epos->bh) { |
28de7948 | 1820 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
6c79e987 | 1821 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) { |
4b11111a MS |
1822 | struct allocExtDesc *aed = |
1823 | (struct allocExtDesc *)epos->bh->b_data; | |
ff116fc8 | 1824 | udf_update_tag(epos->bh->b_data, |
4b11111a MS |
1825 | le32_to_cpu(aed->lengthAllocDescs) + |
1826 | sizeof(struct allocExtDesc)); | |
1da177e4 | 1827 | } |
ff116fc8 | 1828 | mark_buffer_dirty_inode(epos->bh, inode); |
28de7948 | 1829 | } else { |
1da177e4 | 1830 | mark_inode_dirty(inode); |
28de7948 | 1831 | } |
1da177e4 LT |
1832 | |
1833 | if (inc) | |
ff116fc8 | 1834 | epos->offset += adsize; |
28de7948 | 1835 | |
1da177e4 LT |
1836 | return (elen >> 30); |
1837 | } | |
1838 | ||
4b11111a | 1839 | int8_t udf_next_aext(struct inode *inode, struct extent_position *epos, |
5ca4e4be | 1840 | struct kernel_lb_addr *eloc, uint32_t *elen, int inc) |
1da177e4 LT |
1841 | { |
1842 | int8_t etype; | |
1843 | ||
ff116fc8 | 1844 | while ((etype = udf_current_aext(inode, epos, eloc, elen, inc)) == |
cb00ea35 | 1845 | (EXT_NEXT_EXTENT_ALLOCDECS >> 30)) { |
4b11111a | 1846 | int block; |
ff116fc8 JK |
1847 | epos->block = *eloc; |
1848 | epos->offset = sizeof(struct allocExtDesc); | |
3bf25cb4 | 1849 | brelse(epos->bh); |
97e961fd | 1850 | block = udf_get_lb_pblock(inode->i_sb, &epos->block, 0); |
4b11111a MS |
1851 | epos->bh = udf_tread(inode->i_sb, block); |
1852 | if (!epos->bh) { | |
1853 | udf_debug("reading block %d failed!\n", block); | |
1da177e4 LT |
1854 | return -1; |
1855 | } | |
1856 | } | |
1857 | ||
1858 | return etype; | |
1859 | } | |
1860 | ||
4b11111a | 1861 | int8_t udf_current_aext(struct inode *inode, struct extent_position *epos, |
5ca4e4be | 1862 | struct kernel_lb_addr *eloc, uint32_t *elen, int inc) |
1da177e4 LT |
1863 | { |
1864 | int alen; | |
1865 | int8_t etype; | |
1866 | uint8_t *ptr; | |
5ca4e4be PE |
1867 | struct short_ad *sad; |
1868 | struct long_ad *lad; | |
48d6d8ff | 1869 | struct udf_inode_info *iinfo = UDF_I(inode); |
28de7948 | 1870 | |
cb00ea35 | 1871 | if (!epos->bh) { |
ff116fc8 JK |
1872 | if (!epos->offset) |
1873 | epos->offset = udf_file_entry_alloc_offset(inode); | |
48d6d8ff | 1874 | ptr = iinfo->i_ext.i_data + epos->offset - |
4b11111a | 1875 | udf_file_entry_alloc_offset(inode) + |
48d6d8ff | 1876 | iinfo->i_lenEAttr; |
4b11111a | 1877 | alen = udf_file_entry_alloc_offset(inode) + |
48d6d8ff | 1878 | iinfo->i_lenAlloc; |
cb00ea35 | 1879 | } else { |
ff116fc8 JK |
1880 | if (!epos->offset) |
1881 | epos->offset = sizeof(struct allocExtDesc); | |
1882 | ptr = epos->bh->b_data + epos->offset; | |
28de7948 | 1883 | alen = sizeof(struct allocExtDesc) + |
4b11111a MS |
1884 | le32_to_cpu(((struct allocExtDesc *)epos->bh->b_data)-> |
1885 | lengthAllocDescs); | |
1da177e4 LT |
1886 | } |
1887 | ||
48d6d8ff | 1888 | switch (iinfo->i_alloc_type) { |
cb00ea35 | 1889 | case ICBTAG_FLAG_AD_SHORT: |
4b11111a MS |
1890 | sad = udf_get_fileshortad(ptr, alen, &epos->offset, inc); |
1891 | if (!sad) | |
28de7948 CG |
1892 | return -1; |
1893 | etype = le32_to_cpu(sad->extLength) >> 30; | |
1894 | eloc->logicalBlockNum = le32_to_cpu(sad->extPosition); | |
4b11111a | 1895 | eloc->partitionReferenceNum = |
48d6d8ff | 1896 | iinfo->i_location.partitionReferenceNum; |
28de7948 CG |
1897 | *elen = le32_to_cpu(sad->extLength) & UDF_EXTENT_LENGTH_MASK; |
1898 | break; | |
cb00ea35 | 1899 | case ICBTAG_FLAG_AD_LONG: |
4b11111a MS |
1900 | lad = udf_get_filelongad(ptr, alen, &epos->offset, inc); |
1901 | if (!lad) | |
1da177e4 | 1902 | return -1; |
28de7948 CG |
1903 | etype = le32_to_cpu(lad->extLength) >> 30; |
1904 | *eloc = lelb_to_cpu(lad->extLocation); | |
1905 | *elen = le32_to_cpu(lad->extLength) & UDF_EXTENT_LENGTH_MASK; | |
1906 | break; | |
1907 | default: | |
4b11111a | 1908 | udf_debug("alloc_type = %d unsupported\n", |
48d6d8ff | 1909 | iinfo->i_alloc_type); |
28de7948 | 1910 | return -1; |
1da177e4 LT |
1911 | } |
1912 | ||
1913 | return etype; | |
1914 | } | |
1915 | ||
28de7948 | 1916 | static int8_t udf_insert_aext(struct inode *inode, struct extent_position epos, |
5ca4e4be | 1917 | struct kernel_lb_addr neloc, uint32_t nelen) |
1da177e4 | 1918 | { |
5ca4e4be | 1919 | struct kernel_lb_addr oeloc; |
1da177e4 LT |
1920 | uint32_t oelen; |
1921 | int8_t etype; | |
1922 | ||
ff116fc8 | 1923 | if (epos.bh) |
3bf25cb4 | 1924 | get_bh(epos.bh); |
1da177e4 | 1925 | |
cb00ea35 | 1926 | while ((etype = udf_next_aext(inode, &epos, &oeloc, &oelen, 0)) != -1) { |
97e961fd | 1927 | udf_write_aext(inode, &epos, &neloc, nelen, 1); |
1da177e4 LT |
1928 | neloc = oeloc; |
1929 | nelen = (etype << 30) | oelen; | |
1930 | } | |
97e961fd | 1931 | udf_add_aext(inode, &epos, &neloc, nelen, 1); |
3bf25cb4 | 1932 | brelse(epos.bh); |
28de7948 | 1933 | |
1da177e4 LT |
1934 | return (nelen >> 30); |
1935 | } | |
1936 | ||
4b11111a | 1937 | int8_t udf_delete_aext(struct inode *inode, struct extent_position epos, |
5ca4e4be | 1938 | struct kernel_lb_addr eloc, uint32_t elen) |
1da177e4 | 1939 | { |
ff116fc8 JK |
1940 | struct extent_position oepos; |
1941 | int adsize; | |
1da177e4 LT |
1942 | int8_t etype; |
1943 | struct allocExtDesc *aed; | |
48d6d8ff | 1944 | struct udf_inode_info *iinfo; |
1da177e4 | 1945 | |
cb00ea35 | 1946 | if (epos.bh) { |
3bf25cb4 JK |
1947 | get_bh(epos.bh); |
1948 | get_bh(epos.bh); | |
1da177e4 LT |
1949 | } |
1950 | ||
48d6d8ff MS |
1951 | iinfo = UDF_I(inode); |
1952 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) | |
5ca4e4be | 1953 | adsize = sizeof(struct short_ad); |
48d6d8ff | 1954 | else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
5ca4e4be | 1955 | adsize = sizeof(struct long_ad); |
1da177e4 LT |
1956 | else |
1957 | adsize = 0; | |
1958 | ||
ff116fc8 JK |
1959 | oepos = epos; |
1960 | if (udf_next_aext(inode, &epos, &eloc, &elen, 1) == -1) | |
1da177e4 LT |
1961 | return -1; |
1962 | ||
cb00ea35 | 1963 | while ((etype = udf_next_aext(inode, &epos, &eloc, &elen, 1)) != -1) { |
97e961fd | 1964 | udf_write_aext(inode, &oepos, &eloc, (etype << 30) | elen, 1); |
cb00ea35 | 1965 | if (oepos.bh != epos.bh) { |
ff116fc8 | 1966 | oepos.block = epos.block; |
3bf25cb4 JK |
1967 | brelse(oepos.bh); |
1968 | get_bh(epos.bh); | |
ff116fc8 JK |
1969 | oepos.bh = epos.bh; |
1970 | oepos.offset = epos.offset - adsize; | |
1da177e4 LT |
1971 | } |
1972 | } | |
5ca4e4be | 1973 | memset(&eloc, 0x00, sizeof(struct kernel_lb_addr)); |
1da177e4 LT |
1974 | elen = 0; |
1975 | ||
cb00ea35 | 1976 | if (epos.bh != oepos.bh) { |
97e961fd PE |
1977 | udf_free_blocks(inode->i_sb, inode, &epos.block, 0, 1); |
1978 | udf_write_aext(inode, &oepos, &eloc, elen, 1); | |
1979 | udf_write_aext(inode, &oepos, &eloc, elen, 1); | |
cb00ea35 | 1980 | if (!oepos.bh) { |
48d6d8ff | 1981 | iinfo->i_lenAlloc -= (adsize * 2); |
1da177e4 | 1982 | mark_inode_dirty(inode); |
cb00ea35 | 1983 | } else { |
ff116fc8 | 1984 | aed = (struct allocExtDesc *)oepos.bh->b_data; |
c2104fda | 1985 | le32_add_cpu(&aed->lengthAllocDescs, -(2 * adsize)); |
28de7948 | 1986 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
6c79e987 | 1987 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) |
4b11111a MS |
1988 | udf_update_tag(oepos.bh->b_data, |
1989 | oepos.offset - (2 * adsize)); | |
1da177e4 | 1990 | else |
4b11111a MS |
1991 | udf_update_tag(oepos.bh->b_data, |
1992 | sizeof(struct allocExtDesc)); | |
ff116fc8 | 1993 | mark_buffer_dirty_inode(oepos.bh, inode); |
1da177e4 | 1994 | } |
cb00ea35 | 1995 | } else { |
97e961fd | 1996 | udf_write_aext(inode, &oepos, &eloc, elen, 1); |
cb00ea35 | 1997 | if (!oepos.bh) { |
48d6d8ff | 1998 | iinfo->i_lenAlloc -= adsize; |
1da177e4 | 1999 | mark_inode_dirty(inode); |
cb00ea35 | 2000 | } else { |
ff116fc8 | 2001 | aed = (struct allocExtDesc *)oepos.bh->b_data; |
c2104fda | 2002 | le32_add_cpu(&aed->lengthAllocDescs, -adsize); |
28de7948 | 2003 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
6c79e987 | 2004 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) |
4b11111a MS |
2005 | udf_update_tag(oepos.bh->b_data, |
2006 | epos.offset - adsize); | |
1da177e4 | 2007 | else |
4b11111a MS |
2008 | udf_update_tag(oepos.bh->b_data, |
2009 | sizeof(struct allocExtDesc)); | |
ff116fc8 | 2010 | mark_buffer_dirty_inode(oepos.bh, inode); |
1da177e4 LT |
2011 | } |
2012 | } | |
647bd61a | 2013 | |
3bf25cb4 JK |
2014 | brelse(epos.bh); |
2015 | brelse(oepos.bh); | |
28de7948 | 2016 | |
1da177e4 LT |
2017 | return (elen >> 30); |
2018 | } | |
2019 | ||
4b11111a | 2020 | int8_t inode_bmap(struct inode *inode, sector_t block, |
5ca4e4be | 2021 | struct extent_position *pos, struct kernel_lb_addr *eloc, |
4b11111a | 2022 | uint32_t *elen, sector_t *offset) |
1da177e4 | 2023 | { |
4b11111a | 2024 | unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; |
cb00ea35 | 2025 | loff_t lbcount = 0, bcount = |
4b11111a | 2026 | (loff_t) block << blocksize_bits; |
1da177e4 | 2027 | int8_t etype; |
48d6d8ff | 2028 | struct udf_inode_info *iinfo; |
1da177e4 | 2029 | |
48d6d8ff | 2030 | iinfo = UDF_I(inode); |
ff116fc8 | 2031 | pos->offset = 0; |
48d6d8ff | 2032 | pos->block = iinfo->i_location; |
ff116fc8 | 2033 | pos->bh = NULL; |
1da177e4 | 2034 | *elen = 0; |
1da177e4 | 2035 | |
cb00ea35 | 2036 | do { |
4b11111a MS |
2037 | etype = udf_next_aext(inode, pos, eloc, elen, 1); |
2038 | if (etype == -1) { | |
2039 | *offset = (bcount - lbcount) >> blocksize_bits; | |
48d6d8ff | 2040 | iinfo->i_lenExtents = lbcount; |
1da177e4 LT |
2041 | return -1; |
2042 | } | |
2043 | lbcount += *elen; | |
2044 | } while (lbcount <= bcount); | |
2045 | ||
4b11111a | 2046 | *offset = (bcount + *elen - lbcount) >> blocksize_bits; |
1da177e4 LT |
2047 | |
2048 | return etype; | |
2049 | } | |
2050 | ||
60448b1d | 2051 | long udf_block_map(struct inode *inode, sector_t block) |
1da177e4 | 2052 | { |
5ca4e4be | 2053 | struct kernel_lb_addr eloc; |
ff116fc8 | 2054 | uint32_t elen; |
60448b1d | 2055 | sector_t offset; |
28de7948 | 2056 | struct extent_position epos = {}; |
1da177e4 LT |
2057 | int ret; |
2058 | ||
2059 | lock_kernel(); | |
2060 | ||
4b11111a MS |
2061 | if (inode_bmap(inode, block, &epos, &eloc, &elen, &offset) == |
2062 | (EXT_RECORDED_ALLOCATED >> 30)) | |
97e961fd | 2063 | ret = udf_get_lb_pblock(inode->i_sb, &eloc, offset); |
1da177e4 LT |
2064 | else |
2065 | ret = 0; | |
2066 | ||
2067 | unlock_kernel(); | |
3bf25cb4 | 2068 | brelse(epos.bh); |
1da177e4 LT |
2069 | |
2070 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_VARCONV)) | |
2071 | return udf_fixed_to_variable(ret); | |
2072 | else | |
2073 | return ret; | |
2074 | } |