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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * inode.c | |
3 | * | |
4 | * PURPOSE | |
5 | * Inode handling routines for the OSTA-UDF(tm) filesystem. | |
6 | * | |
1da177e4 LT |
7 | * COPYRIGHT |
8 | * This file is distributed under the terms of the GNU General Public | |
9 | * License (GPL). Copies of the GPL can be obtained from: | |
10 | * ftp://prep.ai.mit.edu/pub/gnu/GPL | |
11 | * Each contributing author retains all rights to their own work. | |
12 | * | |
13 | * (C) 1998 Dave Boynton | |
14 | * (C) 1998-2004 Ben Fennema | |
15 | * (C) 1999-2000 Stelias Computing Inc | |
16 | * | |
17 | * HISTORY | |
18 | * | |
19 | * 10/04/98 dgb Added rudimentary directory functions | |
20 | * 10/07/98 Fully working udf_block_map! It works! | |
21 | * 11/25/98 bmap altered to better support extents | |
4b11111a MS |
22 | * 12/06/98 blf partition support in udf_iget, udf_block_map |
23 | * and udf_read_inode | |
1da177e4 LT |
24 | * 12/12/98 rewrote udf_block_map to handle next extents and descs across |
25 | * block boundaries (which is not actually allowed) | |
26 | * 12/20/98 added support for strategy 4096 | |
27 | * 03/07/99 rewrote udf_block_map (again) | |
28 | * New funcs, inode_bmap, udf_next_aext | |
29 | * 04/19/99 Support for writing device EA's for major/minor # | |
30 | */ | |
31 | ||
32 | #include "udfdecl.h" | |
33 | #include <linux/mm.h> | |
34 | #include <linux/smp_lock.h> | |
35 | #include <linux/module.h> | |
36 | #include <linux/pagemap.h> | |
37 | #include <linux/buffer_head.h> | |
38 | #include <linux/writeback.h> | |
39 | #include <linux/slab.h> | |
f845fced | 40 | #include <linux/crc-itu-t.h> |
1da177e4 LT |
41 | |
42 | #include "udf_i.h" | |
43 | #include "udf_sb.h" | |
44 | ||
45 | MODULE_AUTHOR("Ben Fennema"); | |
46 | MODULE_DESCRIPTION("Universal Disk Format Filesystem"); | |
47 | MODULE_LICENSE("GPL"); | |
48 | ||
49 | #define EXTENT_MERGE_SIZE 5 | |
50 | ||
51 | static mode_t udf_convert_permissions(struct fileEntry *); | |
52 | static int udf_update_inode(struct inode *, int); | |
53 | static void udf_fill_inode(struct inode *, struct buffer_head *); | |
647bd61a | 54 | static int udf_alloc_i_data(struct inode *inode, size_t size); |
60448b1d | 55 | static struct buffer_head *inode_getblk(struct inode *, sector_t, int *, |
1ed16171 | 56 | sector_t *, int *); |
ff116fc8 | 57 | static int8_t udf_insert_aext(struct inode *, struct extent_position, |
5ca4e4be | 58 | struct kernel_lb_addr, uint32_t); |
1da177e4 | 59 | static void udf_split_extents(struct inode *, int *, int, int, |
5ca4e4be | 60 | struct kernel_long_ad[EXTENT_MERGE_SIZE], int *); |
1da177e4 | 61 | static void udf_prealloc_extents(struct inode *, int, int, |
5ca4e4be | 62 | struct kernel_long_ad[EXTENT_MERGE_SIZE], int *); |
1da177e4 | 63 | static void udf_merge_extents(struct inode *, |
5ca4e4be | 64 | struct kernel_long_ad[EXTENT_MERGE_SIZE], int *); |
1da177e4 | 65 | static void udf_update_extents(struct inode *, |
5ca4e4be | 66 | struct kernel_long_ad[EXTENT_MERGE_SIZE], int, int, |
cb00ea35 | 67 | struct extent_position *); |
1da177e4 LT |
68 | static int udf_get_block(struct inode *, sector_t, struct buffer_head *, int); |
69 | ||
b1e32126 | 70 | |
cb00ea35 | 71 | void udf_delete_inode(struct inode *inode) |
1da177e4 | 72 | { |
fef26658 MF |
73 | truncate_inode_pages(&inode->i_data, 0); |
74 | ||
1da177e4 LT |
75 | if (is_bad_inode(inode)) |
76 | goto no_delete; | |
77 | ||
78 | inode->i_size = 0; | |
79 | udf_truncate(inode); | |
80 | lock_kernel(); | |
81 | ||
82 | udf_update_inode(inode, IS_SYNC(inode)); | |
83 | udf_free_inode(inode); | |
84 | ||
85 | unlock_kernel(); | |
86 | return; | |
28de7948 CG |
87 | |
88 | no_delete: | |
1da177e4 LT |
89 | clear_inode(inode); |
90 | } | |
91 | ||
74584ae5 | 92 | /* |
81056dd0 JK |
93 | * If we are going to release inode from memory, we truncate last inode extent |
94 | * to proper length. We could use drop_inode() but it's called under inode_lock | |
95 | * and thus we cannot mark inode dirty there. We use clear_inode() but we have | |
96 | * to make sure to write inode as it's not written automatically. | |
74584ae5 | 97 | */ |
1da177e4 LT |
98 | void udf_clear_inode(struct inode *inode) |
99 | { | |
2c948b3f JK |
100 | struct udf_inode_info *iinfo = UDF_I(inode); |
101 | ||
102 | if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB && | |
103 | inode->i_size != iinfo->i_lenExtents) { | |
104 | printk(KERN_WARNING "UDF-fs (%s): Inode %lu (mode %o) has " | |
1537a363 | 105 | "inode size %llu different from extent length %llu. " |
2c948b3f JK |
106 | "Filesystem need not be standards compliant.\n", |
107 | inode->i_sb->s_id, inode->i_ino, inode->i_mode, | |
108 | (unsigned long long)inode->i_size, | |
109 | (unsigned long long)iinfo->i_lenExtents); | |
1da177e4 | 110 | } |
257ba15c | 111 | |
48d6d8ff MS |
112 | kfree(iinfo->i_ext.i_data); |
113 | iinfo->i_ext.i_data = NULL; | |
1da177e4 LT |
114 | } |
115 | ||
116 | static int udf_writepage(struct page *page, struct writeback_control *wbc) | |
117 | { | |
118 | return block_write_full_page(page, udf_get_block, wbc); | |
119 | } | |
120 | ||
121 | static int udf_readpage(struct file *file, struct page *page) | |
122 | { | |
123 | return block_read_full_page(page, udf_get_block); | |
124 | } | |
125 | ||
be021ee4 NP |
126 | static int udf_write_begin(struct file *file, struct address_space *mapping, |
127 | loff_t pos, unsigned len, unsigned flags, | |
128 | struct page **pagep, void **fsdata) | |
1da177e4 | 129 | { |
155130a4 CH |
130 | int ret; |
131 | ||
132 | ret = block_write_begin(mapping, pos, len, flags, pagep, udf_get_block); | |
133 | if (unlikely(ret)) { | |
134 | loff_t isize = mapping->host->i_size; | |
135 | if (pos + len > isize) | |
136 | vmtruncate(mapping->host, isize); | |
137 | } | |
138 | ||
139 | return ret; | |
1da177e4 LT |
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, | |
be021ee4 NP |
151 | .write_begin = udf_write_begin, |
152 | .write_end = generic_write_end, | |
28de7948 | 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; | |
48d6d8ff | 160 | struct udf_inode_info *iinfo = UDF_I(inode); |
1da177e4 LT |
161 | struct writeback_control udf_wbc = { |
162 | .sync_mode = WB_SYNC_NONE, | |
163 | .nr_to_write = 1, | |
164 | }; | |
165 | ||
166 | /* from now on we have normal address_space methods */ | |
167 | inode->i_data.a_ops = &udf_aops; | |
168 | ||
48d6d8ff | 169 | if (!iinfo->i_lenAlloc) { |
1da177e4 | 170 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) |
48d6d8ff | 171 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT; |
1da177e4 | 172 | else |
48d6d8ff | 173 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG; |
1da177e4 LT |
174 | mark_inode_dirty(inode); |
175 | return; | |
176 | } | |
177 | ||
178 | page = grab_cache_page(inode->i_mapping, 0); | |
cd7619d6 MM |
179 | BUG_ON(!PageLocked(page)); |
180 | ||
cb00ea35 | 181 | if (!PageUptodate(page)) { |
1da177e4 | 182 | kaddr = kmap(page); |
48d6d8ff MS |
183 | memset(kaddr + iinfo->i_lenAlloc, 0x00, |
184 | PAGE_CACHE_SIZE - iinfo->i_lenAlloc); | |
185 | memcpy(kaddr, iinfo->i_ext.i_data + iinfo->i_lenEAttr, | |
186 | iinfo->i_lenAlloc); | |
1da177e4 LT |
187 | flush_dcache_page(page); |
188 | SetPageUptodate(page); | |
189 | kunmap(page); | |
190 | } | |
48d6d8ff MS |
191 | memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr, 0x00, |
192 | iinfo->i_lenAlloc); | |
193 | iinfo->i_lenAlloc = 0; | |
1da177e4 | 194 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) |
48d6d8ff | 195 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT; |
1da177e4 | 196 | else |
48d6d8ff | 197 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG; |
1da177e4 LT |
198 | |
199 | inode->i_data.a_ops->writepage(page, &udf_wbc); | |
200 | page_cache_release(page); | |
201 | ||
202 | mark_inode_dirty(inode); | |
203 | } | |
204 | ||
cb00ea35 CG |
205 | struct buffer_head *udf_expand_dir_adinicb(struct inode *inode, int *block, |
206 | int *err) | |
1da177e4 LT |
207 | { |
208 | int newblock; | |
ff116fc8 | 209 | struct buffer_head *dbh = NULL; |
5ca4e4be | 210 | struct kernel_lb_addr eloc; |
1da177e4 | 211 | uint8_t alloctype; |
ff116fc8 | 212 | struct extent_position epos; |
1da177e4 LT |
213 | |
214 | struct udf_fileident_bh sfibh, dfibh; | |
af793295 JK |
215 | loff_t f_pos = udf_ext0_offset(inode); |
216 | int size = udf_ext0_offset(inode) + inode->i_size; | |
1da177e4 | 217 | struct fileIdentDesc cfi, *sfi, *dfi; |
48d6d8ff | 218 | struct udf_inode_info *iinfo = UDF_I(inode); |
1da177e4 LT |
219 | |
220 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) | |
221 | alloctype = ICBTAG_FLAG_AD_SHORT; | |
222 | else | |
223 | alloctype = ICBTAG_FLAG_AD_LONG; | |
224 | ||
cb00ea35 | 225 | if (!inode->i_size) { |
48d6d8ff | 226 | iinfo->i_alloc_type = alloctype; |
1da177e4 LT |
227 | mark_inode_dirty(inode); |
228 | return NULL; | |
229 | } | |
230 | ||
231 | /* alloc block, and copy data to it */ | |
232 | *block = udf_new_block(inode->i_sb, inode, | |
48d6d8ff MS |
233 | iinfo->i_location.partitionReferenceNum, |
234 | iinfo->i_location.logicalBlockNum, err); | |
1da177e4 LT |
235 | if (!(*block)) |
236 | return NULL; | |
237 | newblock = udf_get_pblock(inode->i_sb, *block, | |
48d6d8ff | 238 | iinfo->i_location.partitionReferenceNum, |
c0b34438 | 239 | 0); |
1da177e4 LT |
240 | if (!newblock) |
241 | return NULL; | |
242 | dbh = udf_tgetblk(inode->i_sb, newblock); | |
243 | if (!dbh) | |
244 | return NULL; | |
245 | lock_buffer(dbh); | |
246 | memset(dbh->b_data, 0x00, inode->i_sb->s_blocksize); | |
247 | set_buffer_uptodate(dbh); | |
248 | unlock_buffer(dbh); | |
249 | mark_buffer_dirty_inode(dbh, inode); | |
250 | ||
4b11111a | 251 | sfibh.soffset = sfibh.eoffset = |
af793295 | 252 | f_pos & (inode->i_sb->s_blocksize - 1); |
ff116fc8 | 253 | sfibh.sbh = sfibh.ebh = NULL; |
1da177e4 LT |
254 | dfibh.soffset = dfibh.eoffset = 0; |
255 | dfibh.sbh = dfibh.ebh = dbh; | |
af793295 | 256 | while (f_pos < size) { |
48d6d8ff | 257 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB; |
4b11111a MS |
258 | sfi = udf_fileident_read(inode, &f_pos, &sfibh, &cfi, NULL, |
259 | NULL, NULL, NULL); | |
cb00ea35 | 260 | if (!sfi) { |
3bf25cb4 | 261 | brelse(dbh); |
1da177e4 LT |
262 | return NULL; |
263 | } | |
48d6d8ff | 264 | iinfo->i_alloc_type = alloctype; |
1da177e4 LT |
265 | sfi->descTag.tagLocation = cpu_to_le32(*block); |
266 | dfibh.soffset = dfibh.eoffset; | |
267 | dfibh.eoffset += (sfibh.eoffset - sfibh.soffset); | |
268 | dfi = (struct fileIdentDesc *)(dbh->b_data + dfibh.soffset); | |
269 | if (udf_write_fi(inode, sfi, dfi, &dfibh, sfi->impUse, | |
4b11111a MS |
270 | sfi->fileIdent + |
271 | le16_to_cpu(sfi->lengthOfImpUse))) { | |
48d6d8ff | 272 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB; |
3bf25cb4 | 273 | brelse(dbh); |
1da177e4 LT |
274 | return NULL; |
275 | } | |
276 | } | |
277 | mark_buffer_dirty_inode(dbh, inode); | |
278 | ||
48d6d8ff MS |
279 | memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr, 0, |
280 | iinfo->i_lenAlloc); | |
281 | iinfo->i_lenAlloc = 0; | |
1da177e4 | 282 | eloc.logicalBlockNum = *block; |
4b11111a | 283 | eloc.partitionReferenceNum = |
48d6d8ff | 284 | iinfo->i_location.partitionReferenceNum; |
2c948b3f | 285 | iinfo->i_lenExtents = inode->i_size; |
ff116fc8 | 286 | epos.bh = NULL; |
48d6d8ff | 287 | epos.block = iinfo->i_location; |
ff116fc8 | 288 | epos.offset = udf_file_entry_alloc_offset(inode); |
2c948b3f | 289 | udf_add_aext(inode, &epos, &eloc, inode->i_size, 0); |
1da177e4 LT |
290 | /* UniqueID stuff */ |
291 | ||
3bf25cb4 | 292 | brelse(epos.bh); |
1da177e4 LT |
293 | mark_inode_dirty(inode); |
294 | return dbh; | |
295 | } | |
296 | ||
cb00ea35 CG |
297 | static int udf_get_block(struct inode *inode, sector_t block, |
298 | struct buffer_head *bh_result, int create) | |
1da177e4 LT |
299 | { |
300 | int err, new; | |
301 | struct buffer_head *bh; | |
1ed16171 | 302 | sector_t phys = 0; |
48d6d8ff | 303 | struct udf_inode_info *iinfo; |
1da177e4 | 304 | |
cb00ea35 | 305 | if (!create) { |
1da177e4 LT |
306 | phys = udf_block_map(inode, block); |
307 | if (phys) | |
308 | map_bh(bh_result, inode->i_sb, phys); | |
309 | return 0; | |
310 | } | |
311 | ||
312 | err = -EIO; | |
313 | new = 0; | |
314 | bh = NULL; | |
315 | ||
316 | lock_kernel(); | |
317 | ||
48d6d8ff MS |
318 | iinfo = UDF_I(inode); |
319 | if (block == iinfo->i_next_alloc_block + 1) { | |
320 | iinfo->i_next_alloc_block++; | |
321 | iinfo->i_next_alloc_goal++; | |
1da177e4 LT |
322 | } |
323 | ||
324 | err = 0; | |
325 | ||
326 | bh = inode_getblk(inode, block, &err, &phys, &new); | |
2c2111c2 | 327 | BUG_ON(bh); |
1da177e4 LT |
328 | if (err) |
329 | goto abort; | |
2c2111c2 | 330 | BUG_ON(!phys); |
1da177e4 LT |
331 | |
332 | if (new) | |
333 | set_buffer_new(bh_result); | |
334 | map_bh(bh_result, inode->i_sb, phys); | |
28de7948 CG |
335 | |
336 | abort: | |
1da177e4 LT |
337 | unlock_kernel(); |
338 | return err; | |
1da177e4 LT |
339 | } |
340 | ||
cb00ea35 CG |
341 | static struct buffer_head *udf_getblk(struct inode *inode, long block, |
342 | int create, int *err) | |
1da177e4 | 343 | { |
28de7948 | 344 | struct buffer_head *bh; |
1da177e4 LT |
345 | struct buffer_head dummy; |
346 | ||
347 | dummy.b_state = 0; | |
348 | dummy.b_blocknr = -1000; | |
349 | *err = udf_get_block(inode, block, &dummy, create); | |
cb00ea35 | 350 | if (!*err && buffer_mapped(&dummy)) { |
1da177e4 | 351 | bh = sb_getblk(inode->i_sb, dummy.b_blocknr); |
cb00ea35 | 352 | if (buffer_new(&dummy)) { |
1da177e4 LT |
353 | lock_buffer(bh); |
354 | memset(bh->b_data, 0x00, inode->i_sb->s_blocksize); | |
355 | set_buffer_uptodate(bh); | |
356 | unlock_buffer(bh); | |
357 | mark_buffer_dirty_inode(bh, inode); | |
358 | } | |
359 | return bh; | |
360 | } | |
28de7948 | 361 | |
1da177e4 LT |
362 | return NULL; |
363 | } | |
364 | ||
31170b6a JK |
365 | /* Extend the file by 'blocks' blocks, return the number of extents added */ |
366 | int udf_extend_file(struct inode *inode, struct extent_position *last_pos, | |
5ca4e4be | 367 | struct kernel_long_ad *last_ext, sector_t blocks) |
31170b6a JK |
368 | { |
369 | sector_t add; | |
370 | int count = 0, fake = !(last_ext->extLength & UDF_EXTENT_LENGTH_MASK); | |
371 | struct super_block *sb = inode->i_sb; | |
5ca4e4be | 372 | struct kernel_lb_addr prealloc_loc = {}; |
31170b6a | 373 | int prealloc_len = 0; |
48d6d8ff | 374 | struct udf_inode_info *iinfo; |
31170b6a JK |
375 | |
376 | /* The previous extent is fake and we should not extend by anything | |
377 | * - there's nothing to do... */ | |
378 | if (!blocks && fake) | |
379 | return 0; | |
28de7948 | 380 | |
48d6d8ff | 381 | iinfo = UDF_I(inode); |
31170b6a JK |
382 | /* Round the last extent up to a multiple of block size */ |
383 | if (last_ext->extLength & (sb->s_blocksize - 1)) { | |
384 | last_ext->extLength = | |
28de7948 CG |
385 | (last_ext->extLength & UDF_EXTENT_FLAG_MASK) | |
386 | (((last_ext->extLength & UDF_EXTENT_LENGTH_MASK) + | |
387 | sb->s_blocksize - 1) & ~(sb->s_blocksize - 1)); | |
48d6d8ff MS |
388 | iinfo->i_lenExtents = |
389 | (iinfo->i_lenExtents + sb->s_blocksize - 1) & | |
28de7948 | 390 | ~(sb->s_blocksize - 1); |
31170b6a | 391 | } |
28de7948 | 392 | |
31170b6a | 393 | /* Last extent are just preallocated blocks? */ |
4b11111a MS |
394 | if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) == |
395 | EXT_NOT_RECORDED_ALLOCATED) { | |
31170b6a JK |
396 | /* Save the extent so that we can reattach it to the end */ |
397 | prealloc_loc = last_ext->extLocation; | |
398 | prealloc_len = last_ext->extLength; | |
399 | /* Mark the extent as a hole */ | |
400 | last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | | |
28de7948 | 401 | (last_ext->extLength & UDF_EXTENT_LENGTH_MASK); |
31170b6a | 402 | last_ext->extLocation.logicalBlockNum = 0; |
4b11111a | 403 | last_ext->extLocation.partitionReferenceNum = 0; |
31170b6a | 404 | } |
28de7948 | 405 | |
31170b6a | 406 | /* Can we merge with the previous extent? */ |
4b11111a MS |
407 | if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) == |
408 | EXT_NOT_RECORDED_NOT_ALLOCATED) { | |
409 | add = ((1 << 30) - sb->s_blocksize - | |
410 | (last_ext->extLength & UDF_EXTENT_LENGTH_MASK)) >> | |
411 | sb->s_blocksize_bits; | |
31170b6a JK |
412 | if (add > blocks) |
413 | add = blocks; | |
414 | blocks -= add; | |
415 | last_ext->extLength += add << sb->s_blocksize_bits; | |
416 | } | |
417 | ||
418 | if (fake) { | |
97e961fd | 419 | udf_add_aext(inode, last_pos, &last_ext->extLocation, |
cb00ea35 | 420 | last_ext->extLength, 1); |
31170b6a | 421 | count++; |
4b11111a | 422 | } else |
97e961fd | 423 | udf_write_aext(inode, last_pos, &last_ext->extLocation, |
4b11111a | 424 | last_ext->extLength, 1); |
28de7948 | 425 | |
31170b6a JK |
426 | /* Managed to do everything necessary? */ |
427 | if (!blocks) | |
428 | goto out; | |
429 | ||
430 | /* All further extents will be NOT_RECORDED_NOT_ALLOCATED */ | |
431 | last_ext->extLocation.logicalBlockNum = 0; | |
4b11111a | 432 | last_ext->extLocation.partitionReferenceNum = 0; |
28de7948 | 433 | add = (1 << (30-sb->s_blocksize_bits)) - 1; |
4b11111a MS |
434 | last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | |
435 | (add << sb->s_blocksize_bits); | |
28de7948 | 436 | |
31170b6a JK |
437 | /* Create enough extents to cover the whole hole */ |
438 | while (blocks > add) { | |
439 | blocks -= add; | |
97e961fd | 440 | if (udf_add_aext(inode, last_pos, &last_ext->extLocation, |
cb00ea35 | 441 | last_ext->extLength, 1) == -1) |
31170b6a JK |
442 | return -1; |
443 | count++; | |
444 | } | |
445 | if (blocks) { | |
446 | last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | | |
28de7948 | 447 | (blocks << sb->s_blocksize_bits); |
97e961fd | 448 | if (udf_add_aext(inode, last_pos, &last_ext->extLocation, |
cb00ea35 | 449 | last_ext->extLength, 1) == -1) |
31170b6a JK |
450 | return -1; |
451 | count++; | |
452 | } | |
28de7948 CG |
453 | |
454 | out: | |
31170b6a JK |
455 | /* Do we have some preallocated blocks saved? */ |
456 | if (prealloc_len) { | |
97e961fd | 457 | if (udf_add_aext(inode, last_pos, &prealloc_loc, |
4b11111a | 458 | prealloc_len, 1) == -1) |
31170b6a JK |
459 | return -1; |
460 | last_ext->extLocation = prealloc_loc; | |
461 | last_ext->extLength = prealloc_len; | |
462 | count++; | |
463 | } | |
28de7948 | 464 | |
31170b6a | 465 | /* last_pos should point to the last written extent... */ |
48d6d8ff | 466 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
5ca4e4be | 467 | last_pos->offset -= sizeof(struct short_ad); |
48d6d8ff | 468 | else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
5ca4e4be | 469 | last_pos->offset -= sizeof(struct long_ad); |
31170b6a JK |
470 | else |
471 | return -1; | |
28de7948 | 472 | |
31170b6a JK |
473 | return count; |
474 | } | |
475 | ||
cb00ea35 | 476 | static struct buffer_head *inode_getblk(struct inode *inode, sector_t block, |
1ed16171 | 477 | int *err, sector_t *phys, int *new) |
1da177e4 | 478 | { |
31170b6a | 479 | static sector_t last_block; |
ff116fc8 | 480 | struct buffer_head *result = NULL; |
5ca4e4be | 481 | struct kernel_long_ad laarr[EXTENT_MERGE_SIZE]; |
ff116fc8 | 482 | struct extent_position prev_epos, cur_epos, next_epos; |
1da177e4 | 483 | int count = 0, startnum = 0, endnum = 0; |
85d71244 | 484 | uint32_t elen = 0, tmpelen; |
5ca4e4be | 485 | struct kernel_lb_addr eloc, tmpeloc; |
1da177e4 | 486 | int c = 1; |
60448b1d JK |
487 | loff_t lbcount = 0, b_off = 0; |
488 | uint32_t newblocknum, newblock; | |
489 | sector_t offset = 0; | |
1da177e4 | 490 | int8_t etype; |
48d6d8ff MS |
491 | struct udf_inode_info *iinfo = UDF_I(inode); |
492 | int goal = 0, pgoal = iinfo->i_location.logicalBlockNum; | |
31170b6a | 493 | int lastblock = 0; |
1da177e4 | 494 | |
ff116fc8 | 495 | prev_epos.offset = udf_file_entry_alloc_offset(inode); |
48d6d8ff | 496 | prev_epos.block = iinfo->i_location; |
ff116fc8 JK |
497 | prev_epos.bh = NULL; |
498 | cur_epos = next_epos = prev_epos; | |
28de7948 | 499 | b_off = (loff_t)block << inode->i_sb->s_blocksize_bits; |
1da177e4 LT |
500 | |
501 | /* find the extent which contains the block we are looking for. | |
cb00ea35 CG |
502 | alternate between laarr[0] and laarr[1] for locations of the |
503 | current extent, and the previous extent */ | |
504 | do { | |
505 | if (prev_epos.bh != cur_epos.bh) { | |
3bf25cb4 JK |
506 | brelse(prev_epos.bh); |
507 | get_bh(cur_epos.bh); | |
ff116fc8 | 508 | prev_epos.bh = cur_epos.bh; |
1da177e4 | 509 | } |
cb00ea35 | 510 | if (cur_epos.bh != next_epos.bh) { |
3bf25cb4 JK |
511 | brelse(cur_epos.bh); |
512 | get_bh(next_epos.bh); | |
ff116fc8 | 513 | cur_epos.bh = next_epos.bh; |
1da177e4 LT |
514 | } |
515 | ||
516 | lbcount += elen; | |
517 | ||
ff116fc8 JK |
518 | prev_epos.block = cur_epos.block; |
519 | cur_epos.block = next_epos.block; | |
1da177e4 | 520 | |
ff116fc8 JK |
521 | prev_epos.offset = cur_epos.offset; |
522 | cur_epos.offset = next_epos.offset; | |
1da177e4 | 523 | |
4b11111a MS |
524 | etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 1); |
525 | if (etype == -1) | |
1da177e4 LT |
526 | break; |
527 | ||
528 | c = !c; | |
529 | ||
530 | laarr[c].extLength = (etype << 30) | elen; | |
531 | laarr[c].extLocation = eloc; | |
532 | ||
533 | if (etype != (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) | |
534 | pgoal = eloc.logicalBlockNum + | |
28de7948 CG |
535 | ((elen + inode->i_sb->s_blocksize - 1) >> |
536 | inode->i_sb->s_blocksize_bits); | |
1da177e4 | 537 | |
cb00ea35 | 538 | count++; |
1da177e4 LT |
539 | } while (lbcount + elen <= b_off); |
540 | ||
541 | b_off -= lbcount; | |
542 | offset = b_off >> inode->i_sb->s_blocksize_bits; | |
85d71244 JK |
543 | /* |
544 | * Move prev_epos and cur_epos into indirect extent if we are at | |
545 | * the pointer to it | |
546 | */ | |
547 | udf_next_aext(inode, &prev_epos, &tmpeloc, &tmpelen, 0); | |
548 | udf_next_aext(inode, &cur_epos, &tmpeloc, &tmpelen, 0); | |
1da177e4 LT |
549 | |
550 | /* if the extent is allocated and recorded, return the block | |
cb00ea35 | 551 | if the extent is not a multiple of the blocksize, round up */ |
1da177e4 | 552 | |
cb00ea35 CG |
553 | if (etype == (EXT_RECORDED_ALLOCATED >> 30)) { |
554 | if (elen & (inode->i_sb->s_blocksize - 1)) { | |
1da177e4 | 555 | elen = EXT_RECORDED_ALLOCATED | |
28de7948 CG |
556 | ((elen + inode->i_sb->s_blocksize - 1) & |
557 | ~(inode->i_sb->s_blocksize - 1)); | |
97e961fd | 558 | etype = udf_write_aext(inode, &cur_epos, &eloc, elen, 1); |
1da177e4 | 559 | } |
3bf25cb4 JK |
560 | brelse(prev_epos.bh); |
561 | brelse(cur_epos.bh); | |
562 | brelse(next_epos.bh); | |
97e961fd | 563 | newblock = udf_get_lb_pblock(inode->i_sb, &eloc, offset); |
1da177e4 LT |
564 | *phys = newblock; |
565 | return NULL; | |
566 | } | |
567 | ||
31170b6a JK |
568 | last_block = block; |
569 | /* Are we beyond EOF? */ | |
cb00ea35 | 570 | if (etype == -1) { |
31170b6a JK |
571 | int ret; |
572 | ||
573 | if (count) { | |
574 | if (c) | |
575 | laarr[0] = laarr[1]; | |
576 | startnum = 1; | |
cb00ea35 | 577 | } else { |
31170b6a | 578 | /* Create a fake extent when there's not one */ |
4b11111a | 579 | memset(&laarr[0].extLocation, 0x00, |
5ca4e4be | 580 | sizeof(struct kernel_lb_addr)); |
31170b6a | 581 | laarr[0].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED; |
4b11111a MS |
582 | /* Will udf_extend_file() create real extent from |
583 | a fake one? */ | |
31170b6a JK |
584 | startnum = (offset > 0); |
585 | } | |
586 | /* Create extents for the hole between EOF and offset */ | |
587 | ret = udf_extend_file(inode, &prev_epos, laarr, offset); | |
588 | if (ret == -1) { | |
589 | brelse(prev_epos.bh); | |
590 | brelse(cur_epos.bh); | |
591 | brelse(next_epos.bh); | |
592 | /* We don't really know the error here so we just make | |
593 | * something up */ | |
594 | *err = -ENOSPC; | |
595 | return NULL; | |
596 | } | |
597 | c = 0; | |
598 | offset = 0; | |
599 | count += ret; | |
600 | /* We are not covered by a preallocated extent? */ | |
4b11111a MS |
601 | if ((laarr[0].extLength & UDF_EXTENT_FLAG_MASK) != |
602 | EXT_NOT_RECORDED_ALLOCATED) { | |
31170b6a JK |
603 | /* Is there any real extent? - otherwise we overwrite |
604 | * the fake one... */ | |
605 | if (count) | |
606 | c = !c; | |
607 | laarr[c].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | | |
28de7948 | 608 | inode->i_sb->s_blocksize; |
4b11111a | 609 | memset(&laarr[c].extLocation, 0x00, |
5ca4e4be | 610 | sizeof(struct kernel_lb_addr)); |
cb00ea35 CG |
611 | count++; |
612 | endnum++; | |
31170b6a | 613 | } |
cb00ea35 | 614 | endnum = c + 1; |
1da177e4 | 615 | lastblock = 1; |
cb00ea35 | 616 | } else { |
1da177e4 LT |
617 | endnum = startnum = ((count > 2) ? 2 : count); |
618 | ||
4b11111a MS |
619 | /* if the current extent is in position 0, |
620 | swap it with the previous */ | |
cb00ea35 | 621 | if (!c && count != 1) { |
31170b6a JK |
622 | laarr[2] = laarr[0]; |
623 | laarr[0] = laarr[1]; | |
624 | laarr[1] = laarr[2]; | |
625 | c = 1; | |
626 | } | |
1da177e4 | 627 | |
4b11111a MS |
628 | /* if the current block is located in an extent, |
629 | read the next extent */ | |
630 | etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 0); | |
631 | if (etype != -1) { | |
cb00ea35 CG |
632 | laarr[c + 1].extLength = (etype << 30) | elen; |
633 | laarr[c + 1].extLocation = eloc; | |
634 | count++; | |
635 | startnum++; | |
636 | endnum++; | |
4b11111a | 637 | } else |
1da177e4 LT |
638 | lastblock = 1; |
639 | } | |
1da177e4 LT |
640 | |
641 | /* if the current extent is not recorded but allocated, get the | |
28de7948 | 642 | * block in the extent corresponding to the requested block */ |
4b11111a | 643 | if ((laarr[c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30)) |
1da177e4 | 644 | newblocknum = laarr[c].extLocation.logicalBlockNum + offset; |
4b11111a | 645 | else { /* otherwise, allocate a new block */ |
48d6d8ff MS |
646 | if (iinfo->i_next_alloc_block == block) |
647 | goal = iinfo->i_next_alloc_goal; | |
1da177e4 | 648 | |
cb00ea35 | 649 | if (!goal) { |
4b11111a | 650 | if (!(goal = pgoal)) /* XXX: what was intended here? */ |
48d6d8ff | 651 | goal = iinfo->i_location.logicalBlockNum + 1; |
1da177e4 LT |
652 | } |
653 | ||
4b11111a | 654 | newblocknum = udf_new_block(inode->i_sb, inode, |
48d6d8ff | 655 | iinfo->i_location.partitionReferenceNum, |
4b11111a MS |
656 | goal, err); |
657 | if (!newblocknum) { | |
3bf25cb4 | 658 | brelse(prev_epos.bh); |
1da177e4 LT |
659 | *err = -ENOSPC; |
660 | return NULL; | |
661 | } | |
48d6d8ff | 662 | iinfo->i_lenExtents += inode->i_sb->s_blocksize; |
1da177e4 LT |
663 | } |
664 | ||
4b11111a MS |
665 | /* if the extent the requsted block is located in contains multiple |
666 | * blocks, split the extent into at most three extents. blocks prior | |
667 | * to requested block, requested block, and blocks after requested | |
668 | * block */ | |
1da177e4 LT |
669 | udf_split_extents(inode, &c, offset, newblocknum, laarr, &endnum); |
670 | ||
671 | #ifdef UDF_PREALLOCATE | |
81056dd0 JK |
672 | /* We preallocate blocks only for regular files. It also makes sense |
673 | * for directories but there's a problem when to drop the | |
674 | * preallocation. We might use some delayed work for that but I feel | |
675 | * it's overengineering for a filesystem like UDF. */ | |
676 | if (S_ISREG(inode->i_mode)) | |
677 | udf_prealloc_extents(inode, c, lastblock, laarr, &endnum); | |
1da177e4 LT |
678 | #endif |
679 | ||
680 | /* merge any continuous blocks in laarr */ | |
681 | udf_merge_extents(inode, laarr, &endnum); | |
682 | ||
683 | /* write back the new extents, inserting new extents if the new number | |
28de7948 CG |
684 | * of extents is greater than the old number, and deleting extents if |
685 | * the new number of extents is less than the old number */ | |
ff116fc8 | 686 | udf_update_extents(inode, laarr, startnum, endnum, &prev_epos); |
1da177e4 | 687 | |
3bf25cb4 | 688 | brelse(prev_epos.bh); |
1da177e4 | 689 | |
4b11111a | 690 | newblock = udf_get_pblock(inode->i_sb, newblocknum, |
48d6d8ff | 691 | iinfo->i_location.partitionReferenceNum, 0); |
4b11111a | 692 | if (!newblock) |
1da177e4 | 693 | return NULL; |
1da177e4 LT |
694 | *phys = newblock; |
695 | *err = 0; | |
696 | *new = 1; | |
48d6d8ff MS |
697 | iinfo->i_next_alloc_block = block; |
698 | iinfo->i_next_alloc_goal = newblocknum; | |
1da177e4 LT |
699 | inode->i_ctime = current_fs_time(inode->i_sb); |
700 | ||
701 | if (IS_SYNC(inode)) | |
702 | udf_sync_inode(inode); | |
703 | else | |
704 | mark_inode_dirty(inode); | |
28de7948 | 705 | |
1da177e4 LT |
706 | return result; |
707 | } | |
708 | ||
cb00ea35 CG |
709 | static void udf_split_extents(struct inode *inode, int *c, int offset, |
710 | int newblocknum, | |
5ca4e4be | 711 | struct kernel_long_ad laarr[EXTENT_MERGE_SIZE], |
cb00ea35 | 712 | int *endnum) |
1da177e4 | 713 | { |
4b11111a MS |
714 | unsigned long blocksize = inode->i_sb->s_blocksize; |
715 | unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; | |
716 | ||
1da177e4 | 717 | if ((laarr[*c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30) || |
4b11111a MS |
718 | (laarr[*c].extLength >> 30) == |
719 | (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) { | |
1da177e4 LT |
720 | int curr = *c; |
721 | int blen = ((laarr[curr].extLength & UDF_EXTENT_LENGTH_MASK) + | |
4b11111a | 722 | blocksize - 1) >> blocksize_bits; |
1da177e4 LT |
723 | int8_t etype = (laarr[curr].extLength >> 30); |
724 | ||
4b11111a | 725 | if (blen == 1) |
28de7948 | 726 | ; |
4b11111a | 727 | else if (!offset || blen == offset + 1) { |
cb00ea35 CG |
728 | laarr[curr + 2] = laarr[curr + 1]; |
729 | laarr[curr + 1] = laarr[curr]; | |
730 | } else { | |
731 | laarr[curr + 3] = laarr[curr + 1]; | |
732 | laarr[curr + 2] = laarr[curr + 1] = laarr[curr]; | |
733 | } | |
734 | ||
735 | if (offset) { | |
736 | if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30)) { | |
4b11111a | 737 | udf_free_blocks(inode->i_sb, inode, |
97e961fd | 738 | &laarr[curr].extLocation, |
4b11111a MS |
739 | 0, offset); |
740 | laarr[curr].extLength = | |
741 | EXT_NOT_RECORDED_NOT_ALLOCATED | | |
742 | (offset << blocksize_bits); | |
1da177e4 | 743 | laarr[curr].extLocation.logicalBlockNum = 0; |
4b11111a MS |
744 | laarr[curr].extLocation. |
745 | partitionReferenceNum = 0; | |
746 | } else | |
1da177e4 | 747 | laarr[curr].extLength = (etype << 30) | |
4b11111a | 748 | (offset << blocksize_bits); |
cb00ea35 CG |
749 | curr++; |
750 | (*c)++; | |
751 | (*endnum)++; | |
1da177e4 | 752 | } |
647bd61a | 753 | |
1da177e4 LT |
754 | laarr[curr].extLocation.logicalBlockNum = newblocknum; |
755 | if (etype == (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) | |
756 | laarr[curr].extLocation.partitionReferenceNum = | |
c0b34438 | 757 | UDF_I(inode)->i_location.partitionReferenceNum; |
1da177e4 | 758 | laarr[curr].extLength = EXT_RECORDED_ALLOCATED | |
4b11111a | 759 | blocksize; |
cb00ea35 | 760 | curr++; |
1da177e4 | 761 | |
cb00ea35 | 762 | if (blen != offset + 1) { |
1da177e4 | 763 | if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30)) |
4b11111a MS |
764 | laarr[curr].extLocation.logicalBlockNum += |
765 | offset + 1; | |
28de7948 | 766 | laarr[curr].extLength = (etype << 30) | |
4b11111a | 767 | ((blen - (offset + 1)) << blocksize_bits); |
cb00ea35 CG |
768 | curr++; |
769 | (*endnum)++; | |
1da177e4 LT |
770 | } |
771 | } | |
772 | } | |
773 | ||
774 | static void udf_prealloc_extents(struct inode *inode, int c, int lastblock, | |
5ca4e4be | 775 | struct kernel_long_ad laarr[EXTENT_MERGE_SIZE], |
cb00ea35 | 776 | int *endnum) |
1da177e4 LT |
777 | { |
778 | int start, length = 0, currlength = 0, i; | |
779 | ||
cb00ea35 | 780 | if (*endnum >= (c + 1)) { |
1da177e4 LT |
781 | if (!lastblock) |
782 | return; | |
783 | else | |
784 | start = c; | |
cb00ea35 | 785 | } else { |
4b11111a MS |
786 | if ((laarr[c + 1].extLength >> 30) == |
787 | (EXT_NOT_RECORDED_ALLOCATED >> 30)) { | |
cb00ea35 | 788 | start = c + 1; |
4b11111a MS |
789 | length = currlength = |
790 | (((laarr[c + 1].extLength & | |
791 | UDF_EXTENT_LENGTH_MASK) + | |
792 | inode->i_sb->s_blocksize - 1) >> | |
793 | inode->i_sb->s_blocksize_bits); | |
794 | } else | |
1da177e4 LT |
795 | start = c; |
796 | } | |
797 | ||
cb00ea35 CG |
798 | for (i = start + 1; i <= *endnum; i++) { |
799 | if (i == *endnum) { | |
1da177e4 LT |
800 | if (lastblock) |
801 | length += UDF_DEFAULT_PREALLOC_BLOCKS; | |
4b11111a MS |
802 | } else if ((laarr[i].extLength >> 30) == |
803 | (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) { | |
804 | length += (((laarr[i].extLength & | |
805 | UDF_EXTENT_LENGTH_MASK) + | |
806 | inode->i_sb->s_blocksize - 1) >> | |
807 | inode->i_sb->s_blocksize_bits); | |
808 | } else | |
1da177e4 LT |
809 | break; |
810 | } | |
811 | ||
cb00ea35 | 812 | if (length) { |
1da177e4 | 813 | int next = laarr[start].extLocation.logicalBlockNum + |
28de7948 | 814 | (((laarr[start].extLength & UDF_EXTENT_LENGTH_MASK) + |
4b11111a MS |
815 | inode->i_sb->s_blocksize - 1) >> |
816 | inode->i_sb->s_blocksize_bits); | |
1da177e4 | 817 | int numalloc = udf_prealloc_blocks(inode->i_sb, inode, |
4b11111a MS |
818 | laarr[start].extLocation.partitionReferenceNum, |
819 | next, (UDF_DEFAULT_PREALLOC_BLOCKS > length ? | |
820 | length : UDF_DEFAULT_PREALLOC_BLOCKS) - | |
821 | currlength); | |
28de7948 | 822 | if (numalloc) { |
4b11111a | 823 | if (start == (c + 1)) |
1da177e4 | 824 | laarr[start].extLength += |
4b11111a MS |
825 | (numalloc << |
826 | inode->i_sb->s_blocksize_bits); | |
827 | else { | |
cb00ea35 | 828 | memmove(&laarr[c + 2], &laarr[c + 1], |
5ca4e4be | 829 | sizeof(struct long_ad) * (*endnum - (c + 1))); |
cb00ea35 CG |
830 | (*endnum)++; |
831 | laarr[c + 1].extLocation.logicalBlockNum = next; | |
832 | laarr[c + 1].extLocation.partitionReferenceNum = | |
4b11111a MS |
833 | laarr[c].extLocation. |
834 | partitionReferenceNum; | |
835 | laarr[c + 1].extLength = | |
836 | EXT_NOT_RECORDED_ALLOCATED | | |
837 | (numalloc << | |
838 | inode->i_sb->s_blocksize_bits); | |
cb00ea35 | 839 | start = c + 1; |
1da177e4 LT |
840 | } |
841 | ||
cb00ea35 | 842 | for (i = start + 1; numalloc && i < *endnum; i++) { |
4b11111a MS |
843 | int elen = ((laarr[i].extLength & |
844 | UDF_EXTENT_LENGTH_MASK) + | |
845 | inode->i_sb->s_blocksize - 1) >> | |
846 | inode->i_sb->s_blocksize_bits; | |
1da177e4 | 847 | |
cb00ea35 | 848 | if (elen > numalloc) { |
1da177e4 | 849 | laarr[i].extLength -= |
4b11111a MS |
850 | (numalloc << |
851 | inode->i_sb->s_blocksize_bits); | |
1da177e4 | 852 | numalloc = 0; |
cb00ea35 | 853 | } else { |
1da177e4 | 854 | numalloc -= elen; |
cb00ea35 | 855 | if (*endnum > (i + 1)) |
4b11111a MS |
856 | memmove(&laarr[i], |
857 | &laarr[i + 1], | |
5ca4e4be | 858 | sizeof(struct long_ad) * |
4b11111a | 859 | (*endnum - (i + 1))); |
cb00ea35 CG |
860 | i--; |
861 | (*endnum)--; | |
1da177e4 LT |
862 | } |
863 | } | |
c0b34438 | 864 | UDF_I(inode)->i_lenExtents += |
4b11111a | 865 | numalloc << inode->i_sb->s_blocksize_bits; |
1da177e4 LT |
866 | } |
867 | } | |
868 | } | |
869 | ||
870 | static void udf_merge_extents(struct inode *inode, | |
5ca4e4be | 871 | struct kernel_long_ad laarr[EXTENT_MERGE_SIZE], |
cb00ea35 | 872 | int *endnum) |
1da177e4 LT |
873 | { |
874 | int i; | |
4b11111a MS |
875 | unsigned long blocksize = inode->i_sb->s_blocksize; |
876 | unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; | |
1da177e4 | 877 | |
cb00ea35 | 878 | for (i = 0; i < (*endnum - 1); i++) { |
5ca4e4be PE |
879 | struct kernel_long_ad *li /*l[i]*/ = &laarr[i]; |
880 | struct kernel_long_ad *lip1 /*l[i plus 1]*/ = &laarr[i + 1]; | |
4b11111a MS |
881 | |
882 | if (((li->extLength >> 30) == (lip1->extLength >> 30)) && | |
883 | (((li->extLength >> 30) == | |
884 | (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) || | |
885 | ((lip1->extLocation.logicalBlockNum - | |
886 | li->extLocation.logicalBlockNum) == | |
887 | (((li->extLength & UDF_EXTENT_LENGTH_MASK) + | |
888 | blocksize - 1) >> blocksize_bits)))) { | |
889 | ||
890 | if (((li->extLength & UDF_EXTENT_LENGTH_MASK) + | |
891 | (lip1->extLength & UDF_EXTENT_LENGTH_MASK) + | |
892 | blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) { | |
893 | lip1->extLength = (lip1->extLength - | |
894 | (li->extLength & | |
895 | UDF_EXTENT_LENGTH_MASK) + | |
896 | UDF_EXTENT_LENGTH_MASK) & | |
897 | ~(blocksize - 1); | |
898 | li->extLength = (li->extLength & | |
899 | UDF_EXTENT_FLAG_MASK) + | |
900 | (UDF_EXTENT_LENGTH_MASK + 1) - | |
901 | blocksize; | |
902 | lip1->extLocation.logicalBlockNum = | |
903 | li->extLocation.logicalBlockNum + | |
904 | ((li->extLength & | |
905 | UDF_EXTENT_LENGTH_MASK) >> | |
906 | blocksize_bits); | |
907 | } else { | |
908 | li->extLength = lip1->extLength + | |
909 | (((li->extLength & | |
910 | UDF_EXTENT_LENGTH_MASK) + | |
911 | blocksize - 1) & ~(blocksize - 1)); | |
912 | if (*endnum > (i + 2)) | |
913 | memmove(&laarr[i + 1], &laarr[i + 2], | |
5ca4e4be | 914 | sizeof(struct long_ad) * |
4b11111a MS |
915 | (*endnum - (i + 2))); |
916 | i--; | |
917 | (*endnum)--; | |
1da177e4 | 918 | } |
4b11111a MS |
919 | } else if (((li->extLength >> 30) == |
920 | (EXT_NOT_RECORDED_ALLOCATED >> 30)) && | |
921 | ((lip1->extLength >> 30) == | |
922 | (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))) { | |
97e961fd | 923 | udf_free_blocks(inode->i_sb, inode, &li->extLocation, 0, |
4b11111a MS |
924 | ((li->extLength & |
925 | UDF_EXTENT_LENGTH_MASK) + | |
926 | blocksize - 1) >> blocksize_bits); | |
927 | li->extLocation.logicalBlockNum = 0; | |
928 | li->extLocation.partitionReferenceNum = 0; | |
929 | ||
930 | if (((li->extLength & UDF_EXTENT_LENGTH_MASK) + | |
931 | (lip1->extLength & UDF_EXTENT_LENGTH_MASK) + | |
932 | blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) { | |
933 | lip1->extLength = (lip1->extLength - | |
934 | (li->extLength & | |
935 | UDF_EXTENT_LENGTH_MASK) + | |
936 | UDF_EXTENT_LENGTH_MASK) & | |
937 | ~(blocksize - 1); | |
938 | li->extLength = (li->extLength & | |
939 | UDF_EXTENT_FLAG_MASK) + | |
940 | (UDF_EXTENT_LENGTH_MASK + 1) - | |
941 | blocksize; | |
cb00ea35 | 942 | } else { |
4b11111a MS |
943 | li->extLength = lip1->extLength + |
944 | (((li->extLength & | |
945 | UDF_EXTENT_LENGTH_MASK) + | |
946 | blocksize - 1) & ~(blocksize - 1)); | |
cb00ea35 CG |
947 | if (*endnum > (i + 2)) |
948 | memmove(&laarr[i + 1], &laarr[i + 2], | |
5ca4e4be | 949 | sizeof(struct long_ad) * |
4b11111a | 950 | (*endnum - (i + 2))); |
cb00ea35 CG |
951 | i--; |
952 | (*endnum)--; | |
1da177e4 | 953 | } |
4b11111a MS |
954 | } else if ((li->extLength >> 30) == |
955 | (EXT_NOT_RECORDED_ALLOCATED >> 30)) { | |
956 | udf_free_blocks(inode->i_sb, inode, | |
97e961fd | 957 | &li->extLocation, 0, |
4b11111a MS |
958 | ((li->extLength & |
959 | UDF_EXTENT_LENGTH_MASK) + | |
960 | blocksize - 1) >> blocksize_bits); | |
961 | li->extLocation.logicalBlockNum = 0; | |
962 | li->extLocation.partitionReferenceNum = 0; | |
963 | li->extLength = (li->extLength & | |
964 | UDF_EXTENT_LENGTH_MASK) | | |
965 | EXT_NOT_RECORDED_NOT_ALLOCATED; | |
1da177e4 LT |
966 | } |
967 | } | |
968 | } | |
969 | ||
970 | static void udf_update_extents(struct inode *inode, | |
5ca4e4be | 971 | struct kernel_long_ad laarr[EXTENT_MERGE_SIZE], |
cb00ea35 CG |
972 | int startnum, int endnum, |
973 | struct extent_position *epos) | |
1da177e4 LT |
974 | { |
975 | int start = 0, i; | |
5ca4e4be | 976 | struct kernel_lb_addr tmploc; |
1da177e4 LT |
977 | uint32_t tmplen; |
978 | ||
cb00ea35 CG |
979 | if (startnum > endnum) { |
980 | for (i = 0; i < (startnum - endnum); i++) | |
ff116fc8 | 981 | udf_delete_aext(inode, *epos, laarr[i].extLocation, |
cb00ea35 CG |
982 | laarr[i].extLength); |
983 | } else if (startnum < endnum) { | |
984 | for (i = 0; i < (endnum - startnum); i++) { | |
ff116fc8 | 985 | udf_insert_aext(inode, *epos, laarr[i].extLocation, |
cb00ea35 | 986 | laarr[i].extLength); |
ff116fc8 | 987 | udf_next_aext(inode, epos, &laarr[i].extLocation, |
cb00ea35 CG |
988 | &laarr[i].extLength, 1); |
989 | start++; | |
1da177e4 LT |
990 | } |
991 | } | |
992 | ||
cb00ea35 | 993 | for (i = start; i < endnum; i++) { |
ff116fc8 | 994 | udf_next_aext(inode, epos, &tmploc, &tmplen, 0); |
97e961fd | 995 | udf_write_aext(inode, epos, &laarr[i].extLocation, |
cb00ea35 | 996 | laarr[i].extLength, 1); |
1da177e4 LT |
997 | } |
998 | } | |
999 | ||
cb00ea35 CG |
1000 | struct buffer_head *udf_bread(struct inode *inode, int block, |
1001 | int create, int *err) | |
1da177e4 | 1002 | { |
cb00ea35 | 1003 | struct buffer_head *bh = NULL; |
1da177e4 LT |
1004 | |
1005 | bh = udf_getblk(inode, block, create, err); | |
1006 | if (!bh) | |
1007 | return NULL; | |
1008 | ||
1009 | if (buffer_uptodate(bh)) | |
1010 | return bh; | |
28de7948 | 1011 | |
1da177e4 | 1012 | ll_rw_block(READ, 1, &bh); |
28de7948 | 1013 | |
1da177e4 LT |
1014 | wait_on_buffer(bh); |
1015 | if (buffer_uptodate(bh)) | |
1016 | return bh; | |
28de7948 | 1017 | |
1da177e4 LT |
1018 | brelse(bh); |
1019 | *err = -EIO; | |
1020 | return NULL; | |
1021 | } | |
1022 | ||
cb00ea35 | 1023 | void udf_truncate(struct inode *inode) |
1da177e4 LT |
1024 | { |
1025 | int offset; | |
1026 | int err; | |
48d6d8ff | 1027 | struct udf_inode_info *iinfo; |
1da177e4 LT |
1028 | |
1029 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || | |
cb00ea35 | 1030 | S_ISLNK(inode->i_mode))) |
1da177e4 LT |
1031 | return; |
1032 | if (IS_APPEND(inode) || IS_IMMUTABLE(inode)) | |
1033 | return; | |
1034 | ||
1035 | lock_kernel(); | |
48d6d8ff MS |
1036 | iinfo = UDF_I(inode); |
1037 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { | |
4b11111a MS |
1038 | if (inode->i_sb->s_blocksize < |
1039 | (udf_file_entry_alloc_offset(inode) + | |
1040 | inode->i_size)) { | |
1da177e4 | 1041 | udf_expand_file_adinicb(inode, inode->i_size, &err); |
48d6d8ff MS |
1042 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { |
1043 | inode->i_size = iinfo->i_lenAlloc; | |
1da177e4 LT |
1044 | unlock_kernel(); |
1045 | return; | |
4b11111a | 1046 | } else |
1da177e4 | 1047 | udf_truncate_extents(inode); |
cb00ea35 | 1048 | } else { |
1da177e4 | 1049 | offset = inode->i_size & (inode->i_sb->s_blocksize - 1); |
48d6d8ff | 1050 | memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr + offset, |
c0b34438 | 1051 | 0x00, inode->i_sb->s_blocksize - |
4b11111a | 1052 | offset - udf_file_entry_alloc_offset(inode)); |
48d6d8ff | 1053 | iinfo->i_lenAlloc = inode->i_size; |
1da177e4 | 1054 | } |
cb00ea35 | 1055 | } else { |
4b11111a MS |
1056 | block_truncate_page(inode->i_mapping, inode->i_size, |
1057 | udf_get_block); | |
1da177e4 | 1058 | udf_truncate_extents(inode); |
647bd61a | 1059 | } |
1da177e4 LT |
1060 | |
1061 | inode->i_mtime = inode->i_ctime = current_fs_time(inode->i_sb); | |
1062 | if (IS_SYNC(inode)) | |
cb00ea35 | 1063 | udf_sync_inode(inode); |
1da177e4 LT |
1064 | else |
1065 | mark_inode_dirty(inode); | |
1066 | unlock_kernel(); | |
1067 | } | |
1068 | ||
cb00ea35 | 1069 | static void __udf_read_inode(struct inode *inode) |
1da177e4 LT |
1070 | { |
1071 | struct buffer_head *bh = NULL; | |
1072 | struct fileEntry *fe; | |
1073 | uint16_t ident; | |
48d6d8ff | 1074 | struct udf_inode_info *iinfo = UDF_I(inode); |
1da177e4 LT |
1075 | |
1076 | /* | |
1077 | * Set defaults, but the inode is still incomplete! | |
1078 | * Note: get_new_inode() sets the following on a new inode: | |
1079 | * i_sb = sb | |
1080 | * i_no = ino | |
1081 | * i_flags = sb->s_flags | |
1082 | * i_state = 0 | |
1083 | * clean_inode(): zero fills and sets | |
1084 | * i_count = 1 | |
1085 | * i_nlink = 1 | |
1086 | * i_op = NULL; | |
1087 | */ | |
97e961fd | 1088 | bh = udf_read_ptagged(inode->i_sb, &iinfo->i_location, 0, &ident); |
cb00ea35 | 1089 | if (!bh) { |
1da177e4 | 1090 | printk(KERN_ERR "udf: udf_read_inode(ino %ld) failed !bh\n", |
cb00ea35 | 1091 | inode->i_ino); |
1da177e4 LT |
1092 | make_bad_inode(inode); |
1093 | return; | |
1094 | } | |
1095 | ||
1096 | if (ident != TAG_IDENT_FE && ident != TAG_IDENT_EFE && | |
cb00ea35 | 1097 | ident != TAG_IDENT_USE) { |
4b11111a MS |
1098 | printk(KERN_ERR "udf: udf_read_inode(ino %ld) " |
1099 | "failed ident=%d\n", inode->i_ino, ident); | |
3bf25cb4 | 1100 | brelse(bh); |
1da177e4 LT |
1101 | make_bad_inode(inode); |
1102 | return; | |
1103 | } | |
1104 | ||
1105 | fe = (struct fileEntry *)bh->b_data; | |
1106 | ||
5e0f0017 | 1107 | if (fe->icbTag.strategyType == cpu_to_le16(4096)) { |
1ab92785 | 1108 | struct buffer_head *ibh; |
1da177e4 | 1109 | |
97e961fd | 1110 | ibh = udf_read_ptagged(inode->i_sb, &iinfo->i_location, 1, |
4b11111a | 1111 | &ident); |
1ab92785 | 1112 | if (ident == TAG_IDENT_IE && ibh) { |
1113 | struct buffer_head *nbh = NULL; | |
5ca4e4be | 1114 | struct kernel_lb_addr loc; |
1ab92785 | 1115 | struct indirectEntry *ie; |
1116 | ||
1117 | ie = (struct indirectEntry *)ibh->b_data; | |
1118 | loc = lelb_to_cpu(ie->indirectICB.extLocation); | |
1119 | ||
1120 | if (ie->indirectICB.extLength && | |
97e961fd | 1121 | (nbh = udf_read_ptagged(inode->i_sb, &loc, 0, |
1ab92785 | 1122 | &ident))) { |
1123 | if (ident == TAG_IDENT_FE || | |
1124 | ident == TAG_IDENT_EFE) { | |
1125 | memcpy(&iinfo->i_location, | |
1126 | &loc, | |
5ca4e4be | 1127 | sizeof(struct kernel_lb_addr)); |
1ab92785 | 1128 | brelse(bh); |
3bf25cb4 | 1129 | brelse(ibh); |
1ab92785 | 1130 | brelse(nbh); |
1131 | __udf_read_inode(inode); | |
1132 | return; | |
28de7948 | 1133 | } |
1ab92785 | 1134 | brelse(nbh); |
1da177e4 | 1135 | } |
28de7948 | 1136 | } |
1ab92785 | 1137 | brelse(ibh); |
5e0f0017 | 1138 | } else if (fe->icbTag.strategyType != cpu_to_le16(4)) { |
1da177e4 | 1139 | printk(KERN_ERR "udf: unsupported strategy type: %d\n", |
cb00ea35 | 1140 | le16_to_cpu(fe->icbTag.strategyType)); |
3bf25cb4 | 1141 | brelse(bh); |
1da177e4 LT |
1142 | make_bad_inode(inode); |
1143 | return; | |
1144 | } | |
1145 | udf_fill_inode(inode, bh); | |
31170b6a | 1146 | |
3bf25cb4 | 1147 | brelse(bh); |
1da177e4 LT |
1148 | } |
1149 | ||
1150 | static void udf_fill_inode(struct inode *inode, struct buffer_head *bh) | |
1151 | { | |
1152 | struct fileEntry *fe; | |
1153 | struct extendedFileEntry *efe; | |
1da177e4 | 1154 | int offset; |
6c79e987 | 1155 | struct udf_sb_info *sbi = UDF_SB(inode->i_sb); |
48d6d8ff | 1156 | struct udf_inode_info *iinfo = UDF_I(inode); |
1da177e4 LT |
1157 | |
1158 | fe = (struct fileEntry *)bh->b_data; | |
1159 | efe = (struct extendedFileEntry *)bh->b_data; | |
1160 | ||
5e0f0017 | 1161 | if (fe->icbTag.strategyType == cpu_to_le16(4)) |
48d6d8ff | 1162 | iinfo->i_strat4096 = 0; |
5e0f0017 | 1163 | else /* if (fe->icbTag.strategyType == cpu_to_le16(4096)) */ |
48d6d8ff | 1164 | iinfo->i_strat4096 = 1; |
1da177e4 | 1165 | |
48d6d8ff | 1166 | iinfo->i_alloc_type = le16_to_cpu(fe->icbTag.flags) & |
4b11111a | 1167 | ICBTAG_FLAG_AD_MASK; |
48d6d8ff MS |
1168 | iinfo->i_unique = 0; |
1169 | iinfo->i_lenEAttr = 0; | |
1170 | iinfo->i_lenExtents = 0; | |
1171 | iinfo->i_lenAlloc = 0; | |
1172 | iinfo->i_next_alloc_block = 0; | |
1173 | iinfo->i_next_alloc_goal = 0; | |
5e0f0017 | 1174 | if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_EFE)) { |
48d6d8ff MS |
1175 | iinfo->i_efe = 1; |
1176 | iinfo->i_use = 0; | |
4b11111a MS |
1177 | if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize - |
1178 | sizeof(struct extendedFileEntry))) { | |
647bd61a CG |
1179 | make_bad_inode(inode); |
1180 | return; | |
1181 | } | |
48d6d8ff | 1182 | memcpy(iinfo->i_ext.i_data, |
4b11111a MS |
1183 | bh->b_data + sizeof(struct extendedFileEntry), |
1184 | inode->i_sb->s_blocksize - | |
1185 | sizeof(struct extendedFileEntry)); | |
5e0f0017 | 1186 | } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_FE)) { |
48d6d8ff MS |
1187 | iinfo->i_efe = 0; |
1188 | iinfo->i_use = 0; | |
4b11111a MS |
1189 | if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize - |
1190 | sizeof(struct fileEntry))) { | |
647bd61a CG |
1191 | make_bad_inode(inode); |
1192 | return; | |
1193 | } | |
48d6d8ff | 1194 | memcpy(iinfo->i_ext.i_data, |
c0b34438 | 1195 | bh->b_data + sizeof(struct fileEntry), |
cb00ea35 | 1196 | inode->i_sb->s_blocksize - sizeof(struct fileEntry)); |
5e0f0017 | 1197 | } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_USE)) { |
48d6d8ff MS |
1198 | iinfo->i_efe = 0; |
1199 | iinfo->i_use = 1; | |
1200 | iinfo->i_lenAlloc = le32_to_cpu( | |
4b11111a MS |
1201 | ((struct unallocSpaceEntry *)bh->b_data)-> |
1202 | lengthAllocDescs); | |
1203 | if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize - | |
1204 | sizeof(struct unallocSpaceEntry))) { | |
647bd61a CG |
1205 | make_bad_inode(inode); |
1206 | return; | |
1207 | } | |
48d6d8ff | 1208 | memcpy(iinfo->i_ext.i_data, |
4b11111a MS |
1209 | bh->b_data + sizeof(struct unallocSpaceEntry), |
1210 | inode->i_sb->s_blocksize - | |
1211 | sizeof(struct unallocSpaceEntry)); | |
1da177e4 LT |
1212 | return; |
1213 | } | |
1214 | ||
1215 | inode->i_uid = le32_to_cpu(fe->uid); | |
ca76d2d8 CG |
1216 | if (inode->i_uid == -1 || |
1217 | UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_IGNORE) || | |
1218 | UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_SET)) | |
4d6660eb | 1219 | inode->i_uid = UDF_SB(inode->i_sb)->s_uid; |
1da177e4 LT |
1220 | |
1221 | inode->i_gid = le32_to_cpu(fe->gid); | |
ca76d2d8 CG |
1222 | if (inode->i_gid == -1 || |
1223 | UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_IGNORE) || | |
1224 | UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_SET)) | |
4d6660eb | 1225 | inode->i_gid = UDF_SB(inode->i_sb)->s_gid; |
1da177e4 LT |
1226 | |
1227 | inode->i_nlink = le16_to_cpu(fe->fileLinkCount); | |
1228 | if (!inode->i_nlink) | |
1229 | inode->i_nlink = 1; | |
647bd61a | 1230 | |
1da177e4 | 1231 | inode->i_size = le64_to_cpu(fe->informationLength); |
48d6d8ff | 1232 | iinfo->i_lenExtents = inode->i_size; |
1da177e4 | 1233 | |
7ac9bcd5 | 1234 | if (fe->icbTag.fileType != ICBTAG_FILE_TYPE_DIRECTORY && |
87bc730c | 1235 | sbi->s_fmode != UDF_INVALID_MODE) |
7ac9bcd5 MS |
1236 | inode->i_mode = sbi->s_fmode; |
1237 | else if (fe->icbTag.fileType == ICBTAG_FILE_TYPE_DIRECTORY && | |
87bc730c | 1238 | sbi->s_dmode != UDF_INVALID_MODE) |
7ac9bcd5 MS |
1239 | inode->i_mode = sbi->s_dmode; |
1240 | else | |
1241 | inode->i_mode = udf_convert_permissions(fe); | |
1242 | inode->i_mode &= ~sbi->s_umask; | |
1da177e4 | 1243 | |
48d6d8ff | 1244 | if (iinfo->i_efe == 0) { |
1da177e4 | 1245 | inode->i_blocks = le64_to_cpu(fe->logicalBlocksRecorded) << |
28de7948 | 1246 | (inode->i_sb->s_blocksize_bits - 9); |
1da177e4 | 1247 | |
56774805 | 1248 | if (!udf_disk_stamp_to_time(&inode->i_atime, fe->accessTime)) |
cbf5676a | 1249 | inode->i_atime = sbi->s_record_time; |
1250 | ||
56774805 MS |
1251 | if (!udf_disk_stamp_to_time(&inode->i_mtime, |
1252 | fe->modificationTime)) | |
cbf5676a | 1253 | inode->i_mtime = sbi->s_record_time; |
1254 | ||
56774805 | 1255 | if (!udf_disk_stamp_to_time(&inode->i_ctime, fe->attrTime)) |
cbf5676a | 1256 | inode->i_ctime = sbi->s_record_time; |
1da177e4 | 1257 | |
48d6d8ff MS |
1258 | iinfo->i_unique = le64_to_cpu(fe->uniqueID); |
1259 | iinfo->i_lenEAttr = le32_to_cpu(fe->lengthExtendedAttr); | |
1260 | iinfo->i_lenAlloc = le32_to_cpu(fe->lengthAllocDescs); | |
1261 | offset = sizeof(struct fileEntry) + iinfo->i_lenEAttr; | |
cb00ea35 | 1262 | } else { |
647bd61a | 1263 | inode->i_blocks = le64_to_cpu(efe->logicalBlocksRecorded) << |
cb00ea35 | 1264 | (inode->i_sb->s_blocksize_bits - 9); |
1da177e4 | 1265 | |
56774805 | 1266 | if (!udf_disk_stamp_to_time(&inode->i_atime, efe->accessTime)) |
cbf5676a | 1267 | inode->i_atime = sbi->s_record_time; |
1268 | ||
56774805 MS |
1269 | if (!udf_disk_stamp_to_time(&inode->i_mtime, |
1270 | efe->modificationTime)) | |
cbf5676a | 1271 | inode->i_mtime = sbi->s_record_time; |
1272 | ||
56774805 | 1273 | if (!udf_disk_stamp_to_time(&iinfo->i_crtime, efe->createTime)) |
cbf5676a | 1274 | iinfo->i_crtime = sbi->s_record_time; |
1275 | ||
56774805 | 1276 | if (!udf_disk_stamp_to_time(&inode->i_ctime, efe->attrTime)) |
cbf5676a | 1277 | inode->i_ctime = sbi->s_record_time; |
1da177e4 | 1278 | |
48d6d8ff MS |
1279 | iinfo->i_unique = le64_to_cpu(efe->uniqueID); |
1280 | iinfo->i_lenEAttr = le32_to_cpu(efe->lengthExtendedAttr); | |
1281 | iinfo->i_lenAlloc = le32_to_cpu(efe->lengthAllocDescs); | |
4b11111a | 1282 | offset = sizeof(struct extendedFileEntry) + |
48d6d8ff | 1283 | iinfo->i_lenEAttr; |
1da177e4 LT |
1284 | } |
1285 | ||
cb00ea35 CG |
1286 | switch (fe->icbTag.fileType) { |
1287 | case ICBTAG_FILE_TYPE_DIRECTORY: | |
28de7948 CG |
1288 | inode->i_op = &udf_dir_inode_operations; |
1289 | inode->i_fop = &udf_dir_operations; | |
1290 | inode->i_mode |= S_IFDIR; | |
1291 | inc_nlink(inode); | |
1292 | break; | |
cb00ea35 CG |
1293 | case ICBTAG_FILE_TYPE_REALTIME: |
1294 | case ICBTAG_FILE_TYPE_REGULAR: | |
1295 | case ICBTAG_FILE_TYPE_UNDEF: | |
742e1795 | 1296 | case ICBTAG_FILE_TYPE_VAT20: |
48d6d8ff | 1297 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
28de7948 CG |
1298 | inode->i_data.a_ops = &udf_adinicb_aops; |
1299 | else | |
1300 | inode->i_data.a_ops = &udf_aops; | |
1301 | inode->i_op = &udf_file_inode_operations; | |
1302 | inode->i_fop = &udf_file_operations; | |
1303 | inode->i_mode |= S_IFREG; | |
1304 | break; | |
cb00ea35 | 1305 | case ICBTAG_FILE_TYPE_BLOCK: |
28de7948 CG |
1306 | inode->i_mode |= S_IFBLK; |
1307 | break; | |
cb00ea35 | 1308 | case ICBTAG_FILE_TYPE_CHAR: |
28de7948 CG |
1309 | inode->i_mode |= S_IFCHR; |
1310 | break; | |
cb00ea35 | 1311 | case ICBTAG_FILE_TYPE_FIFO: |
28de7948 CG |
1312 | init_special_inode(inode, inode->i_mode | S_IFIFO, 0); |
1313 | break; | |
cb00ea35 | 1314 | case ICBTAG_FILE_TYPE_SOCKET: |
28de7948 CG |
1315 | init_special_inode(inode, inode->i_mode | S_IFSOCK, 0); |
1316 | break; | |
cb00ea35 | 1317 | case ICBTAG_FILE_TYPE_SYMLINK: |
28de7948 | 1318 | inode->i_data.a_ops = &udf_symlink_aops; |
c15d0fc0 | 1319 | inode->i_op = &udf_symlink_inode_operations; |
28de7948 CG |
1320 | inode->i_mode = S_IFLNK | S_IRWXUGO; |
1321 | break; | |
bfb257a5 JK |
1322 | case ICBTAG_FILE_TYPE_MAIN: |
1323 | udf_debug("METADATA FILE-----\n"); | |
1324 | break; | |
1325 | case ICBTAG_FILE_TYPE_MIRROR: | |
1326 | udf_debug("METADATA MIRROR FILE-----\n"); | |
1327 | break; | |
1328 | case ICBTAG_FILE_TYPE_BITMAP: | |
1329 | udf_debug("METADATA BITMAP FILE-----\n"); | |
1330 | break; | |
cb00ea35 | 1331 | default: |
4b11111a MS |
1332 | printk(KERN_ERR "udf: udf_fill_inode(ino %ld) failed unknown " |
1333 | "file type=%d\n", inode->i_ino, | |
1334 | fe->icbTag.fileType); | |
28de7948 CG |
1335 | make_bad_inode(inode); |
1336 | return; | |
1da177e4 | 1337 | } |
cb00ea35 | 1338 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { |
4b11111a MS |
1339 | struct deviceSpec *dsea = |
1340 | (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1); | |
cb00ea35 CG |
1341 | if (dsea) { |
1342 | init_special_inode(inode, inode->i_mode, | |
4b11111a MS |
1343 | MKDEV(le32_to_cpu(dsea->majorDeviceIdent), |
1344 | le32_to_cpu(dsea->minorDeviceIdent))); | |
1da177e4 | 1345 | /* Developer ID ??? */ |
4b11111a | 1346 | } else |
1da177e4 | 1347 | make_bad_inode(inode); |
1da177e4 LT |
1348 | } |
1349 | } | |
1350 | ||
647bd61a CG |
1351 | static int udf_alloc_i_data(struct inode *inode, size_t size) |
1352 | { | |
48d6d8ff MS |
1353 | struct udf_inode_info *iinfo = UDF_I(inode); |
1354 | iinfo->i_ext.i_data = kmalloc(size, GFP_KERNEL); | |
647bd61a | 1355 | |
48d6d8ff | 1356 | if (!iinfo->i_ext.i_data) { |
4b11111a MS |
1357 | printk(KERN_ERR "udf:udf_alloc_i_data (ino %ld) " |
1358 | "no free memory\n", inode->i_ino); | |
647bd61a CG |
1359 | return -ENOMEM; |
1360 | } | |
1361 | ||
1362 | return 0; | |
1363 | } | |
1364 | ||
cb00ea35 | 1365 | static mode_t udf_convert_permissions(struct fileEntry *fe) |
1da177e4 LT |
1366 | { |
1367 | mode_t mode; | |
1368 | uint32_t permissions; | |
1369 | uint32_t flags; | |
1370 | ||
1371 | permissions = le32_to_cpu(fe->permissions); | |
1372 | flags = le16_to_cpu(fe->icbTag.flags); | |
1373 | ||
4b11111a MS |
1374 | mode = ((permissions) & S_IRWXO) | |
1375 | ((permissions >> 2) & S_IRWXG) | | |
1376 | ((permissions >> 4) & S_IRWXU) | | |
1377 | ((flags & ICBTAG_FLAG_SETUID) ? S_ISUID : 0) | | |
1378 | ((flags & ICBTAG_FLAG_SETGID) ? S_ISGID : 0) | | |
1379 | ((flags & ICBTAG_FLAG_STICKY) ? S_ISVTX : 0); | |
1da177e4 LT |
1380 | |
1381 | return mode; | |
1382 | } | |
1383 | ||
a9185b41 | 1384 | int udf_write_inode(struct inode *inode, struct writeback_control *wbc) |
1da177e4 LT |
1385 | { |
1386 | int ret; | |
28de7948 | 1387 | |
1da177e4 | 1388 | lock_kernel(); |
a9185b41 | 1389 | ret = udf_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL); |
1da177e4 | 1390 | unlock_kernel(); |
28de7948 | 1391 | |
1da177e4 LT |
1392 | return ret; |
1393 | } | |
1394 | ||
cb00ea35 | 1395 | int udf_sync_inode(struct inode *inode) |
1da177e4 LT |
1396 | { |
1397 | return udf_update_inode(inode, 1); | |
1398 | } | |
1399 | ||
cb00ea35 | 1400 | static int udf_update_inode(struct inode *inode, int do_sync) |
1da177e4 LT |
1401 | { |
1402 | struct buffer_head *bh = NULL; | |
1403 | struct fileEntry *fe; | |
1404 | struct extendedFileEntry *efe; | |
1405 | uint32_t udfperms; | |
1406 | uint16_t icbflags; | |
1407 | uint16_t crclen; | |
1da177e4 | 1408 | int err = 0; |
6c79e987 | 1409 | struct udf_sb_info *sbi = UDF_SB(inode->i_sb); |
4b11111a | 1410 | unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; |
48d6d8ff | 1411 | struct udf_inode_info *iinfo = UDF_I(inode); |
1da177e4 | 1412 | |
5833ded9 JK |
1413 | bh = udf_tgetblk(inode->i_sb, |
1414 | udf_get_lb_pblock(inode->i_sb, &iinfo->i_location, 0)); | |
cb00ea35 | 1415 | if (!bh) { |
aae917cd JK |
1416 | udf_debug("getblk failure\n"); |
1417 | return -ENOMEM; | |
1da177e4 LT |
1418 | } |
1419 | ||
aae917cd JK |
1420 | lock_buffer(bh); |
1421 | memset(bh->b_data, 0, inode->i_sb->s_blocksize); | |
1da177e4 LT |
1422 | fe = (struct fileEntry *)bh->b_data; |
1423 | efe = (struct extendedFileEntry *)bh->b_data; | |
1424 | ||
aae917cd | 1425 | if (iinfo->i_use) { |
1da177e4 | 1426 | struct unallocSpaceEntry *use = |
28de7948 | 1427 | (struct unallocSpaceEntry *)bh->b_data; |
1da177e4 | 1428 | |
48d6d8ff | 1429 | use->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc); |
4b11111a | 1430 | memcpy(bh->b_data + sizeof(struct unallocSpaceEntry), |
48d6d8ff | 1431 | iinfo->i_ext.i_data, inode->i_sb->s_blocksize - |
4b11111a | 1432 | sizeof(struct unallocSpaceEntry)); |
aae917cd JK |
1433 | use->descTag.tagIdent = cpu_to_le16(TAG_IDENT_USE); |
1434 | use->descTag.tagLocation = | |
1435 | cpu_to_le32(iinfo->i_location.logicalBlockNum); | |
4b11111a | 1436 | crclen = sizeof(struct unallocSpaceEntry) + |
5ca4e4be | 1437 | iinfo->i_lenAlloc - sizeof(struct tag); |
1da177e4 | 1438 | use->descTag.descCRCLength = cpu_to_le16(crclen); |
f845fced | 1439 | use->descTag.descCRC = cpu_to_le16(crc_itu_t(0, (char *)use + |
5ca4e4be | 1440 | sizeof(struct tag), |
f845fced | 1441 | crclen)); |
3f2587bb | 1442 | use->descTag.tagChecksum = udf_tag_checksum(&use->descTag); |
1da177e4 | 1443 | |
aae917cd | 1444 | goto out; |
1da177e4 LT |
1445 | } |
1446 | ||
4d6660eb PS |
1447 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_FORGET)) |
1448 | fe->uid = cpu_to_le32(-1); | |
cb00ea35 CG |
1449 | else |
1450 | fe->uid = cpu_to_le32(inode->i_uid); | |
1da177e4 | 1451 | |
4d6660eb PS |
1452 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_FORGET)) |
1453 | fe->gid = cpu_to_le32(-1); | |
cb00ea35 CG |
1454 | else |
1455 | fe->gid = cpu_to_le32(inode->i_gid); | |
1da177e4 | 1456 | |
4b11111a MS |
1457 | udfperms = ((inode->i_mode & S_IRWXO)) | |
1458 | ((inode->i_mode & S_IRWXG) << 2) | | |
1459 | ((inode->i_mode & S_IRWXU) << 4); | |
1da177e4 | 1460 | |
4b11111a MS |
1461 | udfperms |= (le32_to_cpu(fe->permissions) & |
1462 | (FE_PERM_O_DELETE | FE_PERM_O_CHATTR | | |
1463 | FE_PERM_G_DELETE | FE_PERM_G_CHATTR | | |
1464 | FE_PERM_U_DELETE | FE_PERM_U_CHATTR)); | |
1da177e4 LT |
1465 | fe->permissions = cpu_to_le32(udfperms); |
1466 | ||
1467 | if (S_ISDIR(inode->i_mode)) | |
1468 | fe->fileLinkCount = cpu_to_le16(inode->i_nlink - 1); | |
1469 | else | |
1470 | fe->fileLinkCount = cpu_to_le16(inode->i_nlink); | |
1471 | ||
1472 | fe->informationLength = cpu_to_le64(inode->i_size); | |
1473 | ||
cb00ea35 | 1474 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { |
5ca4e4be | 1475 | struct regid *eid; |
28de7948 CG |
1476 | struct deviceSpec *dsea = |
1477 | (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1); | |
cb00ea35 | 1478 | if (!dsea) { |
1da177e4 | 1479 | dsea = (struct deviceSpec *) |
28de7948 CG |
1480 | udf_add_extendedattr(inode, |
1481 | sizeof(struct deviceSpec) + | |
5ca4e4be | 1482 | sizeof(struct regid), 12, 0x3); |
1da177e4 LT |
1483 | dsea->attrType = cpu_to_le32(12); |
1484 | dsea->attrSubtype = 1; | |
4b11111a MS |
1485 | dsea->attrLength = cpu_to_le32( |
1486 | sizeof(struct deviceSpec) + | |
5ca4e4be PE |
1487 | sizeof(struct regid)); |
1488 | dsea->impUseLength = cpu_to_le32(sizeof(struct regid)); | |
1da177e4 | 1489 | } |
5ca4e4be PE |
1490 | eid = (struct regid *)dsea->impUse; |
1491 | memset(eid, 0, sizeof(struct regid)); | |
1da177e4 LT |
1492 | strcpy(eid->ident, UDF_ID_DEVELOPER); |
1493 | eid->identSuffix[0] = UDF_OS_CLASS_UNIX; | |
1494 | eid->identSuffix[1] = UDF_OS_ID_LINUX; | |
1495 | dsea->majorDeviceIdent = cpu_to_le32(imajor(inode)); | |
1496 | dsea->minorDeviceIdent = cpu_to_le32(iminor(inode)); | |
1497 | } | |
1498 | ||
48d6d8ff | 1499 | if (iinfo->i_efe == 0) { |
c0b34438 | 1500 | memcpy(bh->b_data + sizeof(struct fileEntry), |
48d6d8ff | 1501 | iinfo->i_ext.i_data, |
cb00ea35 | 1502 | inode->i_sb->s_blocksize - sizeof(struct fileEntry)); |
28de7948 | 1503 | fe->logicalBlocksRecorded = cpu_to_le64( |
4b11111a MS |
1504 | (inode->i_blocks + (1 << (blocksize_bits - 9)) - 1) >> |
1505 | (blocksize_bits - 9)); | |
1da177e4 | 1506 | |
56774805 MS |
1507 | udf_time_to_disk_stamp(&fe->accessTime, inode->i_atime); |
1508 | udf_time_to_disk_stamp(&fe->modificationTime, inode->i_mtime); | |
1509 | udf_time_to_disk_stamp(&fe->attrTime, inode->i_ctime); | |
5ca4e4be | 1510 | memset(&(fe->impIdent), 0, sizeof(struct regid)); |
1da177e4 LT |
1511 | strcpy(fe->impIdent.ident, UDF_ID_DEVELOPER); |
1512 | fe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; | |
1513 | fe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; | |
48d6d8ff MS |
1514 | fe->uniqueID = cpu_to_le64(iinfo->i_unique); |
1515 | fe->lengthExtendedAttr = cpu_to_le32(iinfo->i_lenEAttr); | |
1516 | fe->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc); | |
1da177e4 LT |
1517 | fe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_FE); |
1518 | crclen = sizeof(struct fileEntry); | |
cb00ea35 | 1519 | } else { |
4b11111a | 1520 | memcpy(bh->b_data + sizeof(struct extendedFileEntry), |
48d6d8ff | 1521 | iinfo->i_ext.i_data, |
4b11111a MS |
1522 | inode->i_sb->s_blocksize - |
1523 | sizeof(struct extendedFileEntry)); | |
1da177e4 | 1524 | efe->objectSize = cpu_to_le64(inode->i_size); |
28de7948 | 1525 | efe->logicalBlocksRecorded = cpu_to_le64( |
4b11111a MS |
1526 | (inode->i_blocks + (1 << (blocksize_bits - 9)) - 1) >> |
1527 | (blocksize_bits - 9)); | |
1da177e4 | 1528 | |
48d6d8ff MS |
1529 | if (iinfo->i_crtime.tv_sec > inode->i_atime.tv_sec || |
1530 | (iinfo->i_crtime.tv_sec == inode->i_atime.tv_sec && | |
1531 | iinfo->i_crtime.tv_nsec > inode->i_atime.tv_nsec)) | |
1532 | iinfo->i_crtime = inode->i_atime; | |
4b11111a | 1533 | |
48d6d8ff MS |
1534 | if (iinfo->i_crtime.tv_sec > inode->i_mtime.tv_sec || |
1535 | (iinfo->i_crtime.tv_sec == inode->i_mtime.tv_sec && | |
1536 | iinfo->i_crtime.tv_nsec > inode->i_mtime.tv_nsec)) | |
1537 | iinfo->i_crtime = inode->i_mtime; | |
4b11111a | 1538 | |
48d6d8ff MS |
1539 | if (iinfo->i_crtime.tv_sec > inode->i_ctime.tv_sec || |
1540 | (iinfo->i_crtime.tv_sec == inode->i_ctime.tv_sec && | |
1541 | iinfo->i_crtime.tv_nsec > inode->i_ctime.tv_nsec)) | |
1542 | iinfo->i_crtime = inode->i_ctime; | |
1da177e4 | 1543 | |
56774805 MS |
1544 | udf_time_to_disk_stamp(&efe->accessTime, inode->i_atime); |
1545 | udf_time_to_disk_stamp(&efe->modificationTime, inode->i_mtime); | |
1546 | udf_time_to_disk_stamp(&efe->createTime, iinfo->i_crtime); | |
1547 | udf_time_to_disk_stamp(&efe->attrTime, inode->i_ctime); | |
1da177e4 | 1548 | |
5ca4e4be | 1549 | memset(&(efe->impIdent), 0, sizeof(struct regid)); |
1da177e4 LT |
1550 | strcpy(efe->impIdent.ident, UDF_ID_DEVELOPER); |
1551 | efe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; | |
1552 | efe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; | |
48d6d8ff MS |
1553 | efe->uniqueID = cpu_to_le64(iinfo->i_unique); |
1554 | efe->lengthExtendedAttr = cpu_to_le32(iinfo->i_lenEAttr); | |
1555 | efe->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc); | |
1da177e4 LT |
1556 | efe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_EFE); |
1557 | crclen = sizeof(struct extendedFileEntry); | |
1558 | } | |
48d6d8ff | 1559 | if (iinfo->i_strat4096) { |
1da177e4 LT |
1560 | fe->icbTag.strategyType = cpu_to_le16(4096); |
1561 | fe->icbTag.strategyParameter = cpu_to_le16(1); | |
1562 | fe->icbTag.numEntries = cpu_to_le16(2); | |
cb00ea35 | 1563 | } else { |
1da177e4 LT |
1564 | fe->icbTag.strategyType = cpu_to_le16(4); |
1565 | fe->icbTag.numEntries = cpu_to_le16(1); | |
1566 | } | |
1567 | ||
1568 | if (S_ISDIR(inode->i_mode)) | |
1569 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_DIRECTORY; | |
1570 | else if (S_ISREG(inode->i_mode)) | |
1571 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_REGULAR; | |
1572 | else if (S_ISLNK(inode->i_mode)) | |
1573 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_SYMLINK; | |
1574 | else if (S_ISBLK(inode->i_mode)) | |
1575 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_BLOCK; | |
1576 | else if (S_ISCHR(inode->i_mode)) | |
1577 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_CHAR; | |
1578 | else if (S_ISFIFO(inode->i_mode)) | |
1579 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_FIFO; | |
1580 | else if (S_ISSOCK(inode->i_mode)) | |
1581 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_SOCKET; | |
1582 | ||
48d6d8ff | 1583 | icbflags = iinfo->i_alloc_type | |
28de7948 CG |
1584 | ((inode->i_mode & S_ISUID) ? ICBTAG_FLAG_SETUID : 0) | |
1585 | ((inode->i_mode & S_ISGID) ? ICBTAG_FLAG_SETGID : 0) | | |
1586 | ((inode->i_mode & S_ISVTX) ? ICBTAG_FLAG_STICKY : 0) | | |
1587 | (le16_to_cpu(fe->icbTag.flags) & | |
1588 | ~(ICBTAG_FLAG_AD_MASK | ICBTAG_FLAG_SETUID | | |
1589 | ICBTAG_FLAG_SETGID | ICBTAG_FLAG_STICKY)); | |
1da177e4 LT |
1590 | |
1591 | fe->icbTag.flags = cpu_to_le16(icbflags); | |
6c79e987 | 1592 | if (sbi->s_udfrev >= 0x0200) |
1da177e4 LT |
1593 | fe->descTag.descVersion = cpu_to_le16(3); |
1594 | else | |
1595 | fe->descTag.descVersion = cpu_to_le16(2); | |
6c79e987 | 1596 | fe->descTag.tagSerialNum = cpu_to_le16(sbi->s_serial_number); |
4b11111a | 1597 | fe->descTag.tagLocation = cpu_to_le32( |
48d6d8ff | 1598 | iinfo->i_location.logicalBlockNum); |
aae917cd | 1599 | crclen += iinfo->i_lenEAttr + iinfo->i_lenAlloc - sizeof(struct tag); |
1da177e4 | 1600 | fe->descTag.descCRCLength = cpu_to_le16(crclen); |
5ca4e4be | 1601 | fe->descTag.descCRC = cpu_to_le16(crc_itu_t(0, (char *)fe + sizeof(struct tag), |
f845fced | 1602 | crclen)); |
3f2587bb | 1603 | fe->descTag.tagChecksum = udf_tag_checksum(&fe->descTag); |
1da177e4 | 1604 | |
aae917cd | 1605 | out: |
5833ded9 | 1606 | set_buffer_uptodate(bh); |
aae917cd JK |
1607 | unlock_buffer(bh); |
1608 | ||
1da177e4 LT |
1609 | /* write the data blocks */ |
1610 | mark_buffer_dirty(bh); | |
cb00ea35 | 1611 | if (do_sync) { |
1da177e4 | 1612 | sync_dirty_buffer(bh); |
aae917cd | 1613 | if (buffer_write_io_error(bh)) { |
4b11111a MS |
1614 | printk(KERN_WARNING "IO error syncing udf inode " |
1615 | "[%s:%08lx]\n", inode->i_sb->s_id, | |
1616 | inode->i_ino); | |
1da177e4 LT |
1617 | err = -EIO; |
1618 | } | |
1619 | } | |
3bf25cb4 | 1620 | brelse(bh); |
28de7948 | 1621 | |
1da177e4 LT |
1622 | return err; |
1623 | } | |
1624 | ||
97e961fd | 1625 | struct inode *udf_iget(struct super_block *sb, struct kernel_lb_addr *ino) |
1da177e4 LT |
1626 | { |
1627 | unsigned long block = udf_get_lb_pblock(sb, ino, 0); | |
1628 | struct inode *inode = iget_locked(sb, block); | |
1629 | ||
1630 | if (!inode) | |
1631 | return NULL; | |
1632 | ||
1633 | if (inode->i_state & I_NEW) { | |
97e961fd | 1634 | memcpy(&UDF_I(inode)->i_location, ino, sizeof(struct kernel_lb_addr)); |
1da177e4 LT |
1635 | __udf_read_inode(inode); |
1636 | unlock_new_inode(inode); | |
1637 | } | |
1638 | ||
1639 | if (is_bad_inode(inode)) | |
1640 | goto out_iput; | |
1641 | ||
97e961fd PE |
1642 | if (ino->logicalBlockNum >= UDF_SB(sb)-> |
1643 | s_partmaps[ino->partitionReferenceNum].s_partition_len) { | |
1da177e4 | 1644 | udf_debug("block=%d, partition=%d out of range\n", |
97e961fd | 1645 | ino->logicalBlockNum, ino->partitionReferenceNum); |
1da177e4 LT |
1646 | make_bad_inode(inode); |
1647 | goto out_iput; | |
1648 | } | |
1649 | ||
1650 | return inode; | |
1651 | ||
28de7948 | 1652 | out_iput: |
1da177e4 LT |
1653 | iput(inode); |
1654 | return NULL; | |
1655 | } | |
1656 | ||
4b11111a | 1657 | int8_t udf_add_aext(struct inode *inode, struct extent_position *epos, |
97e961fd | 1658 | struct kernel_lb_addr *eloc, uint32_t elen, int inc) |
1da177e4 LT |
1659 | { |
1660 | int adsize; | |
5ca4e4be PE |
1661 | struct short_ad *sad = NULL; |
1662 | struct long_ad *lad = NULL; | |
1da177e4 LT |
1663 | struct allocExtDesc *aed; |
1664 | int8_t etype; | |
1665 | uint8_t *ptr; | |
48d6d8ff | 1666 | struct udf_inode_info *iinfo = UDF_I(inode); |
1da177e4 | 1667 | |
ff116fc8 | 1668 | if (!epos->bh) |
48d6d8ff | 1669 | ptr = iinfo->i_ext.i_data + epos->offset - |
4b11111a | 1670 | udf_file_entry_alloc_offset(inode) + |
48d6d8ff | 1671 | iinfo->i_lenEAttr; |
1da177e4 | 1672 | else |
ff116fc8 | 1673 | ptr = epos->bh->b_data + epos->offset; |
1da177e4 | 1674 | |
48d6d8ff | 1675 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
5ca4e4be | 1676 | adsize = sizeof(struct short_ad); |
48d6d8ff | 1677 | else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
5ca4e4be | 1678 | adsize = sizeof(struct long_ad); |
1da177e4 LT |
1679 | else |
1680 | return -1; | |
1681 | ||
cb00ea35 | 1682 | if (epos->offset + (2 * adsize) > inode->i_sb->s_blocksize) { |
391e8bbd | 1683 | unsigned char *sptr, *dptr; |
1da177e4 LT |
1684 | struct buffer_head *nbh; |
1685 | int err, loffset; | |
5ca4e4be | 1686 | struct kernel_lb_addr obloc = epos->block; |
1da177e4 | 1687 | |
4b11111a MS |
1688 | epos->block.logicalBlockNum = udf_new_block(inode->i_sb, NULL, |
1689 | obloc.partitionReferenceNum, | |
1690 | obloc.logicalBlockNum, &err); | |
1691 | if (!epos->block.logicalBlockNum) | |
1da177e4 | 1692 | return -1; |
4b11111a | 1693 | nbh = udf_tgetblk(inode->i_sb, udf_get_lb_pblock(inode->i_sb, |
97e961fd | 1694 | &epos->block, |
4b11111a MS |
1695 | 0)); |
1696 | if (!nbh) | |
1da177e4 | 1697 | return -1; |
1da177e4 LT |
1698 | lock_buffer(nbh); |
1699 | memset(nbh->b_data, 0x00, inode->i_sb->s_blocksize); | |
1700 | set_buffer_uptodate(nbh); | |
1701 | unlock_buffer(nbh); | |
1702 | mark_buffer_dirty_inode(nbh, inode); | |
1703 | ||
1704 | aed = (struct allocExtDesc *)(nbh->b_data); | |
1705 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT)) | |
4b11111a MS |
1706 | aed->previousAllocExtLocation = |
1707 | cpu_to_le32(obloc.logicalBlockNum); | |
cb00ea35 | 1708 | if (epos->offset + adsize > inode->i_sb->s_blocksize) { |
ff116fc8 | 1709 | loffset = epos->offset; |
1da177e4 LT |
1710 | aed->lengthAllocDescs = cpu_to_le32(adsize); |
1711 | sptr = ptr - adsize; | |
1712 | dptr = nbh->b_data + sizeof(struct allocExtDesc); | |
1713 | memcpy(dptr, sptr, adsize); | |
ff116fc8 | 1714 | epos->offset = sizeof(struct allocExtDesc) + adsize; |
cb00ea35 | 1715 | } else { |
ff116fc8 | 1716 | loffset = epos->offset + adsize; |
1da177e4 LT |
1717 | aed->lengthAllocDescs = cpu_to_le32(0); |
1718 | sptr = ptr; | |
ff116fc8 | 1719 | epos->offset = sizeof(struct allocExtDesc); |
1da177e4 | 1720 | |
cb00ea35 | 1721 | if (epos->bh) { |
ff116fc8 | 1722 | aed = (struct allocExtDesc *)epos->bh->b_data; |
c2104fda | 1723 | le32_add_cpu(&aed->lengthAllocDescs, adsize); |
cb00ea35 | 1724 | } else { |
48d6d8ff | 1725 | iinfo->i_lenAlloc += adsize; |
1da177e4 LT |
1726 | mark_inode_dirty(inode); |
1727 | } | |
1728 | } | |
6c79e987 | 1729 | if (UDF_SB(inode->i_sb)->s_udfrev >= 0x0200) |
1da177e4 | 1730 | udf_new_tag(nbh->b_data, TAG_IDENT_AED, 3, 1, |
5ca4e4be | 1731 | epos->block.logicalBlockNum, sizeof(struct tag)); |
1da177e4 LT |
1732 | else |
1733 | udf_new_tag(nbh->b_data, TAG_IDENT_AED, 2, 1, | |
5ca4e4be | 1734 | epos->block.logicalBlockNum, sizeof(struct tag)); |
48d6d8ff | 1735 | switch (iinfo->i_alloc_type) { |
cb00ea35 | 1736 | case ICBTAG_FLAG_AD_SHORT: |
5ca4e4be | 1737 | sad = (struct short_ad *)sptr; |
28de7948 CG |
1738 | sad->extLength = cpu_to_le32(EXT_NEXT_EXTENT_ALLOCDECS | |
1739 | inode->i_sb->s_blocksize); | |
4b11111a MS |
1740 | sad->extPosition = |
1741 | cpu_to_le32(epos->block.logicalBlockNum); | |
28de7948 | 1742 | break; |
cb00ea35 | 1743 | case ICBTAG_FLAG_AD_LONG: |
5ca4e4be | 1744 | lad = (struct long_ad *)sptr; |
28de7948 CG |
1745 | lad->extLength = cpu_to_le32(EXT_NEXT_EXTENT_ALLOCDECS | |
1746 | inode->i_sb->s_blocksize); | |
1747 | lad->extLocation = cpu_to_lelb(epos->block); | |
1748 | memset(lad->impUse, 0x00, sizeof(lad->impUse)); | |
1749 | break; | |
1da177e4 | 1750 | } |
cb00ea35 | 1751 | if (epos->bh) { |
28de7948 | 1752 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
6c79e987 | 1753 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) |
ff116fc8 | 1754 | udf_update_tag(epos->bh->b_data, loffset); |
1da177e4 | 1755 | else |
4b11111a MS |
1756 | udf_update_tag(epos->bh->b_data, |
1757 | sizeof(struct allocExtDesc)); | |
ff116fc8 | 1758 | mark_buffer_dirty_inode(epos->bh, inode); |
3bf25cb4 | 1759 | brelse(epos->bh); |
28de7948 | 1760 | } else { |
1da177e4 | 1761 | mark_inode_dirty(inode); |
28de7948 | 1762 | } |
ff116fc8 | 1763 | epos->bh = nbh; |
1da177e4 LT |
1764 | } |
1765 | ||
ff116fc8 | 1766 | etype = udf_write_aext(inode, epos, eloc, elen, inc); |
1da177e4 | 1767 | |
cb00ea35 | 1768 | if (!epos->bh) { |
48d6d8ff | 1769 | iinfo->i_lenAlloc += adsize; |
1da177e4 | 1770 | mark_inode_dirty(inode); |
cb00ea35 | 1771 | } else { |
ff116fc8 | 1772 | aed = (struct allocExtDesc *)epos->bh->b_data; |
c2104fda | 1773 | le32_add_cpu(&aed->lengthAllocDescs, adsize); |
4b11111a MS |
1774 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
1775 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) | |
1776 | udf_update_tag(epos->bh->b_data, | |
1777 | epos->offset + (inc ? 0 : adsize)); | |
1da177e4 | 1778 | else |
4b11111a MS |
1779 | udf_update_tag(epos->bh->b_data, |
1780 | sizeof(struct allocExtDesc)); | |
ff116fc8 | 1781 | mark_buffer_dirty_inode(epos->bh, inode); |
1da177e4 LT |
1782 | } |
1783 | ||
1784 | return etype; | |
1785 | } | |
1786 | ||
4b11111a | 1787 | int8_t udf_write_aext(struct inode *inode, struct extent_position *epos, |
97e961fd | 1788 | struct kernel_lb_addr *eloc, uint32_t elen, int inc) |
1da177e4 LT |
1789 | { |
1790 | int adsize; | |
1791 | uint8_t *ptr; | |
5ca4e4be PE |
1792 | struct short_ad *sad; |
1793 | struct long_ad *lad; | |
48d6d8ff | 1794 | struct udf_inode_info *iinfo = UDF_I(inode); |
1da177e4 | 1795 | |
ff116fc8 | 1796 | if (!epos->bh) |
48d6d8ff | 1797 | ptr = iinfo->i_ext.i_data + epos->offset - |
4b11111a | 1798 | udf_file_entry_alloc_offset(inode) + |
48d6d8ff | 1799 | iinfo->i_lenEAttr; |
1da177e4 | 1800 | else |
ff116fc8 | 1801 | ptr = epos->bh->b_data + epos->offset; |
1da177e4 | 1802 | |
48d6d8ff | 1803 | switch (iinfo->i_alloc_type) { |
cb00ea35 | 1804 | case ICBTAG_FLAG_AD_SHORT: |
5ca4e4be | 1805 | sad = (struct short_ad *)ptr; |
28de7948 | 1806 | sad->extLength = cpu_to_le32(elen); |
97e961fd | 1807 | sad->extPosition = cpu_to_le32(eloc->logicalBlockNum); |
5ca4e4be | 1808 | adsize = sizeof(struct short_ad); |
28de7948 | 1809 | break; |
cb00ea35 | 1810 | case ICBTAG_FLAG_AD_LONG: |
5ca4e4be | 1811 | lad = (struct long_ad *)ptr; |
28de7948 | 1812 | lad->extLength = cpu_to_le32(elen); |
97e961fd | 1813 | lad->extLocation = cpu_to_lelb(*eloc); |
28de7948 | 1814 | memset(lad->impUse, 0x00, sizeof(lad->impUse)); |
5ca4e4be | 1815 | adsize = sizeof(struct long_ad); |
28de7948 | 1816 | break; |
cb00ea35 CG |
1817 | default: |
1818 | return -1; | |
1da177e4 LT |
1819 | } |
1820 | ||
cb00ea35 | 1821 | if (epos->bh) { |
28de7948 | 1822 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
6c79e987 | 1823 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) { |
4b11111a MS |
1824 | struct allocExtDesc *aed = |
1825 | (struct allocExtDesc *)epos->bh->b_data; | |
ff116fc8 | 1826 | udf_update_tag(epos->bh->b_data, |
4b11111a MS |
1827 | le32_to_cpu(aed->lengthAllocDescs) + |
1828 | sizeof(struct allocExtDesc)); | |
1da177e4 | 1829 | } |
ff116fc8 | 1830 | mark_buffer_dirty_inode(epos->bh, inode); |
28de7948 | 1831 | } else { |
1da177e4 | 1832 | mark_inode_dirty(inode); |
28de7948 | 1833 | } |
1da177e4 LT |
1834 | |
1835 | if (inc) | |
ff116fc8 | 1836 | epos->offset += adsize; |
28de7948 | 1837 | |
1da177e4 LT |
1838 | return (elen >> 30); |
1839 | } | |
1840 | ||
4b11111a | 1841 | int8_t udf_next_aext(struct inode *inode, struct extent_position *epos, |
5ca4e4be | 1842 | struct kernel_lb_addr *eloc, uint32_t *elen, int inc) |
1da177e4 LT |
1843 | { |
1844 | int8_t etype; | |
1845 | ||
ff116fc8 | 1846 | while ((etype = udf_current_aext(inode, epos, eloc, elen, inc)) == |
cb00ea35 | 1847 | (EXT_NEXT_EXTENT_ALLOCDECS >> 30)) { |
4b11111a | 1848 | int block; |
ff116fc8 JK |
1849 | epos->block = *eloc; |
1850 | epos->offset = sizeof(struct allocExtDesc); | |
3bf25cb4 | 1851 | brelse(epos->bh); |
97e961fd | 1852 | block = udf_get_lb_pblock(inode->i_sb, &epos->block, 0); |
4b11111a MS |
1853 | epos->bh = udf_tread(inode->i_sb, block); |
1854 | if (!epos->bh) { | |
1855 | udf_debug("reading block %d failed!\n", block); | |
1da177e4 LT |
1856 | return -1; |
1857 | } | |
1858 | } | |
1859 | ||
1860 | return etype; | |
1861 | } | |
1862 | ||
4b11111a | 1863 | int8_t udf_current_aext(struct inode *inode, struct extent_position *epos, |
5ca4e4be | 1864 | struct kernel_lb_addr *eloc, uint32_t *elen, int inc) |
1da177e4 LT |
1865 | { |
1866 | int alen; | |
1867 | int8_t etype; | |
1868 | uint8_t *ptr; | |
5ca4e4be PE |
1869 | struct short_ad *sad; |
1870 | struct long_ad *lad; | |
48d6d8ff | 1871 | struct udf_inode_info *iinfo = UDF_I(inode); |
28de7948 | 1872 | |
cb00ea35 | 1873 | if (!epos->bh) { |
ff116fc8 JK |
1874 | if (!epos->offset) |
1875 | epos->offset = udf_file_entry_alloc_offset(inode); | |
48d6d8ff | 1876 | ptr = iinfo->i_ext.i_data + epos->offset - |
4b11111a | 1877 | udf_file_entry_alloc_offset(inode) + |
48d6d8ff | 1878 | iinfo->i_lenEAttr; |
4b11111a | 1879 | alen = udf_file_entry_alloc_offset(inode) + |
48d6d8ff | 1880 | iinfo->i_lenAlloc; |
cb00ea35 | 1881 | } else { |
ff116fc8 JK |
1882 | if (!epos->offset) |
1883 | epos->offset = sizeof(struct allocExtDesc); | |
1884 | ptr = epos->bh->b_data + epos->offset; | |
28de7948 | 1885 | alen = sizeof(struct allocExtDesc) + |
4b11111a MS |
1886 | le32_to_cpu(((struct allocExtDesc *)epos->bh->b_data)-> |
1887 | lengthAllocDescs); | |
1da177e4 LT |
1888 | } |
1889 | ||
48d6d8ff | 1890 | switch (iinfo->i_alloc_type) { |
cb00ea35 | 1891 | case ICBTAG_FLAG_AD_SHORT: |
4b11111a MS |
1892 | sad = udf_get_fileshortad(ptr, alen, &epos->offset, inc); |
1893 | if (!sad) | |
28de7948 CG |
1894 | return -1; |
1895 | etype = le32_to_cpu(sad->extLength) >> 30; | |
1896 | eloc->logicalBlockNum = le32_to_cpu(sad->extPosition); | |
4b11111a | 1897 | eloc->partitionReferenceNum = |
48d6d8ff | 1898 | iinfo->i_location.partitionReferenceNum; |
28de7948 CG |
1899 | *elen = le32_to_cpu(sad->extLength) & UDF_EXTENT_LENGTH_MASK; |
1900 | break; | |
cb00ea35 | 1901 | case ICBTAG_FLAG_AD_LONG: |
4b11111a MS |
1902 | lad = udf_get_filelongad(ptr, alen, &epos->offset, inc); |
1903 | if (!lad) | |
1da177e4 | 1904 | return -1; |
28de7948 CG |
1905 | etype = le32_to_cpu(lad->extLength) >> 30; |
1906 | *eloc = lelb_to_cpu(lad->extLocation); | |
1907 | *elen = le32_to_cpu(lad->extLength) & UDF_EXTENT_LENGTH_MASK; | |
1908 | break; | |
1909 | default: | |
4b11111a | 1910 | udf_debug("alloc_type = %d unsupported\n", |
48d6d8ff | 1911 | iinfo->i_alloc_type); |
28de7948 | 1912 | return -1; |
1da177e4 LT |
1913 | } |
1914 | ||
1915 | return etype; | |
1916 | } | |
1917 | ||
28de7948 | 1918 | static int8_t udf_insert_aext(struct inode *inode, struct extent_position epos, |
5ca4e4be | 1919 | struct kernel_lb_addr neloc, uint32_t nelen) |
1da177e4 | 1920 | { |
5ca4e4be | 1921 | struct kernel_lb_addr oeloc; |
1da177e4 LT |
1922 | uint32_t oelen; |
1923 | int8_t etype; | |
1924 | ||
ff116fc8 | 1925 | if (epos.bh) |
3bf25cb4 | 1926 | get_bh(epos.bh); |
1da177e4 | 1927 | |
cb00ea35 | 1928 | while ((etype = udf_next_aext(inode, &epos, &oeloc, &oelen, 0)) != -1) { |
97e961fd | 1929 | udf_write_aext(inode, &epos, &neloc, nelen, 1); |
1da177e4 LT |
1930 | neloc = oeloc; |
1931 | nelen = (etype << 30) | oelen; | |
1932 | } | |
97e961fd | 1933 | udf_add_aext(inode, &epos, &neloc, nelen, 1); |
3bf25cb4 | 1934 | brelse(epos.bh); |
28de7948 | 1935 | |
1da177e4 LT |
1936 | return (nelen >> 30); |
1937 | } | |
1938 | ||
4b11111a | 1939 | int8_t udf_delete_aext(struct inode *inode, struct extent_position epos, |
5ca4e4be | 1940 | struct kernel_lb_addr eloc, uint32_t elen) |
1da177e4 | 1941 | { |
ff116fc8 JK |
1942 | struct extent_position oepos; |
1943 | int adsize; | |
1da177e4 LT |
1944 | int8_t etype; |
1945 | struct allocExtDesc *aed; | |
48d6d8ff | 1946 | struct udf_inode_info *iinfo; |
1da177e4 | 1947 | |
cb00ea35 | 1948 | if (epos.bh) { |
3bf25cb4 JK |
1949 | get_bh(epos.bh); |
1950 | get_bh(epos.bh); | |
1da177e4 LT |
1951 | } |
1952 | ||
48d6d8ff MS |
1953 | iinfo = UDF_I(inode); |
1954 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) | |
5ca4e4be | 1955 | adsize = sizeof(struct short_ad); |
48d6d8ff | 1956 | else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
5ca4e4be | 1957 | adsize = sizeof(struct long_ad); |
1da177e4 LT |
1958 | else |
1959 | adsize = 0; | |
1960 | ||
ff116fc8 JK |
1961 | oepos = epos; |
1962 | if (udf_next_aext(inode, &epos, &eloc, &elen, 1) == -1) | |
1da177e4 LT |
1963 | return -1; |
1964 | ||
cb00ea35 | 1965 | while ((etype = udf_next_aext(inode, &epos, &eloc, &elen, 1)) != -1) { |
97e961fd | 1966 | udf_write_aext(inode, &oepos, &eloc, (etype << 30) | elen, 1); |
cb00ea35 | 1967 | if (oepos.bh != epos.bh) { |
ff116fc8 | 1968 | oepos.block = epos.block; |
3bf25cb4 JK |
1969 | brelse(oepos.bh); |
1970 | get_bh(epos.bh); | |
ff116fc8 JK |
1971 | oepos.bh = epos.bh; |
1972 | oepos.offset = epos.offset - adsize; | |
1da177e4 LT |
1973 | } |
1974 | } | |
5ca4e4be | 1975 | memset(&eloc, 0x00, sizeof(struct kernel_lb_addr)); |
1da177e4 LT |
1976 | elen = 0; |
1977 | ||
cb00ea35 | 1978 | if (epos.bh != oepos.bh) { |
97e961fd PE |
1979 | udf_free_blocks(inode->i_sb, inode, &epos.block, 0, 1); |
1980 | udf_write_aext(inode, &oepos, &eloc, elen, 1); | |
1981 | udf_write_aext(inode, &oepos, &eloc, elen, 1); | |
cb00ea35 | 1982 | if (!oepos.bh) { |
48d6d8ff | 1983 | iinfo->i_lenAlloc -= (adsize * 2); |
1da177e4 | 1984 | mark_inode_dirty(inode); |
cb00ea35 | 1985 | } else { |
ff116fc8 | 1986 | aed = (struct allocExtDesc *)oepos.bh->b_data; |
c2104fda | 1987 | le32_add_cpu(&aed->lengthAllocDescs, -(2 * adsize)); |
28de7948 | 1988 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
6c79e987 | 1989 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) |
4b11111a MS |
1990 | udf_update_tag(oepos.bh->b_data, |
1991 | oepos.offset - (2 * adsize)); | |
1da177e4 | 1992 | else |
4b11111a MS |
1993 | udf_update_tag(oepos.bh->b_data, |
1994 | sizeof(struct allocExtDesc)); | |
ff116fc8 | 1995 | mark_buffer_dirty_inode(oepos.bh, inode); |
1da177e4 | 1996 | } |
cb00ea35 | 1997 | } else { |
97e961fd | 1998 | udf_write_aext(inode, &oepos, &eloc, elen, 1); |
cb00ea35 | 1999 | if (!oepos.bh) { |
48d6d8ff | 2000 | iinfo->i_lenAlloc -= adsize; |
1da177e4 | 2001 | mark_inode_dirty(inode); |
cb00ea35 | 2002 | } else { |
ff116fc8 | 2003 | aed = (struct allocExtDesc *)oepos.bh->b_data; |
c2104fda | 2004 | le32_add_cpu(&aed->lengthAllocDescs, -adsize); |
28de7948 | 2005 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
6c79e987 | 2006 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) |
4b11111a MS |
2007 | udf_update_tag(oepos.bh->b_data, |
2008 | epos.offset - adsize); | |
1da177e4 | 2009 | else |
4b11111a MS |
2010 | udf_update_tag(oepos.bh->b_data, |
2011 | sizeof(struct allocExtDesc)); | |
ff116fc8 | 2012 | mark_buffer_dirty_inode(oepos.bh, inode); |
1da177e4 LT |
2013 | } |
2014 | } | |
647bd61a | 2015 | |
3bf25cb4 JK |
2016 | brelse(epos.bh); |
2017 | brelse(oepos.bh); | |
28de7948 | 2018 | |
1da177e4 LT |
2019 | return (elen >> 30); |
2020 | } | |
2021 | ||
4b11111a | 2022 | int8_t inode_bmap(struct inode *inode, sector_t block, |
5ca4e4be | 2023 | struct extent_position *pos, struct kernel_lb_addr *eloc, |
4b11111a | 2024 | uint32_t *elen, sector_t *offset) |
1da177e4 | 2025 | { |
4b11111a | 2026 | unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; |
cb00ea35 | 2027 | loff_t lbcount = 0, bcount = |
4b11111a | 2028 | (loff_t) block << blocksize_bits; |
1da177e4 | 2029 | int8_t etype; |
48d6d8ff | 2030 | struct udf_inode_info *iinfo; |
1da177e4 | 2031 | |
48d6d8ff | 2032 | iinfo = UDF_I(inode); |
ff116fc8 | 2033 | pos->offset = 0; |
48d6d8ff | 2034 | pos->block = iinfo->i_location; |
ff116fc8 | 2035 | pos->bh = NULL; |
1da177e4 | 2036 | *elen = 0; |
1da177e4 | 2037 | |
cb00ea35 | 2038 | do { |
4b11111a MS |
2039 | etype = udf_next_aext(inode, pos, eloc, elen, 1); |
2040 | if (etype == -1) { | |
2041 | *offset = (bcount - lbcount) >> blocksize_bits; | |
48d6d8ff | 2042 | iinfo->i_lenExtents = lbcount; |
1da177e4 LT |
2043 | return -1; |
2044 | } | |
2045 | lbcount += *elen; | |
2046 | } while (lbcount <= bcount); | |
2047 | ||
4b11111a | 2048 | *offset = (bcount + *elen - lbcount) >> blocksize_bits; |
1da177e4 LT |
2049 | |
2050 | return etype; | |
2051 | } | |
2052 | ||
60448b1d | 2053 | long udf_block_map(struct inode *inode, sector_t block) |
1da177e4 | 2054 | { |
5ca4e4be | 2055 | struct kernel_lb_addr eloc; |
ff116fc8 | 2056 | uint32_t elen; |
60448b1d | 2057 | sector_t offset; |
28de7948 | 2058 | struct extent_position epos = {}; |
1da177e4 LT |
2059 | int ret; |
2060 | ||
2061 | lock_kernel(); | |
2062 | ||
4b11111a MS |
2063 | if (inode_bmap(inode, block, &epos, &eloc, &elen, &offset) == |
2064 | (EXT_RECORDED_ALLOCATED >> 30)) | |
97e961fd | 2065 | ret = udf_get_lb_pblock(inode->i_sb, &eloc, offset); |
1da177e4 LT |
2066 | else |
2067 | ret = 0; | |
2068 | ||
2069 | unlock_kernel(); | |
3bf25cb4 | 2070 | brelse(epos.bh); |
1da177e4 LT |
2071 | |
2072 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_VARCONV)) | |
2073 | return udf_fixed_to_variable(ret); | |
2074 | else | |
2075 | return ret; | |
2076 | } |