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> | |
39 | #include <linux/slab.h> | |
40 | ||
41 | #include "udf_i.h" | |
42 | #include "udf_sb.h" | |
43 | ||
44 | MODULE_AUTHOR("Ben Fennema"); | |
45 | MODULE_DESCRIPTION("Universal Disk Format Filesystem"); | |
46 | MODULE_LICENSE("GPL"); | |
47 | ||
48 | #define EXTENT_MERGE_SIZE 5 | |
49 | ||
50 | static mode_t udf_convert_permissions(struct fileEntry *); | |
51 | static int udf_update_inode(struct inode *, int); | |
52 | static void udf_fill_inode(struct inode *, struct buffer_head *); | |
647bd61a | 53 | static int udf_alloc_i_data(struct inode *inode, size_t size); |
60448b1d | 54 | static struct buffer_head *inode_getblk(struct inode *, sector_t, int *, |
1ed16171 | 55 | sector_t *, int *); |
ff116fc8 | 56 | static int8_t udf_insert_aext(struct inode *, struct extent_position, |
cb00ea35 | 57 | kernel_lb_addr, uint32_t); |
1da177e4 | 58 | static void udf_split_extents(struct inode *, int *, int, int, |
cb00ea35 | 59 | kernel_long_ad[EXTENT_MERGE_SIZE], int *); |
1da177e4 | 60 | static void udf_prealloc_extents(struct inode *, int, int, |
cb00ea35 | 61 | kernel_long_ad[EXTENT_MERGE_SIZE], int *); |
1da177e4 | 62 | static void udf_merge_extents(struct inode *, |
cb00ea35 | 63 | kernel_long_ad[EXTENT_MERGE_SIZE], int *); |
1da177e4 | 64 | static void udf_update_extents(struct inode *, |
cb00ea35 CG |
65 | kernel_long_ad[EXTENT_MERGE_SIZE], int, int, |
66 | struct extent_position *); | |
1da177e4 LT |
67 | static int udf_get_block(struct inode *, sector_t, struct buffer_head *, int); |
68 | ||
69 | /* | |
70 | * udf_delete_inode | |
71 | * | |
72 | * PURPOSE | |
73 | * Clean-up before the specified inode is destroyed. | |
74 | * | |
75 | * DESCRIPTION | |
76 | * This routine is called when the kernel destroys an inode structure | |
77 | * ie. when iput() finds i_count == 0. | |
78 | * | |
79 | * HISTORY | |
80 | * July 1, 1997 - Andrew E. Mileski | |
81 | * Written, tested, and released. | |
82 | * | |
83 | * Called at the last iput() if i_nlink is zero. | |
84 | */ | |
cb00ea35 | 85 | void udf_delete_inode(struct inode *inode) |
1da177e4 | 86 | { |
fef26658 MF |
87 | truncate_inode_pages(&inode->i_data, 0); |
88 | ||
1da177e4 LT |
89 | if (is_bad_inode(inode)) |
90 | goto no_delete; | |
91 | ||
92 | inode->i_size = 0; | |
93 | udf_truncate(inode); | |
94 | lock_kernel(); | |
95 | ||
96 | udf_update_inode(inode, IS_SYNC(inode)); | |
97 | udf_free_inode(inode); | |
98 | ||
99 | unlock_kernel(); | |
100 | return; | |
28de7948 CG |
101 | |
102 | no_delete: | |
1da177e4 LT |
103 | clear_inode(inode); |
104 | } | |
105 | ||
74584ae5 JK |
106 | /* |
107 | * If we are going to release inode from memory, we discard preallocation and | |
108 | * truncate last inode extent to proper length. We could use drop_inode() but | |
109 | * it's called under inode_lock and thus we cannot mark inode dirty there. We | |
110 | * use clear_inode() but we have to make sure to write inode as it's not written | |
111 | * automatically. | |
112 | */ | |
1da177e4 LT |
113 | void udf_clear_inode(struct inode *inode) |
114 | { | |
48d6d8ff | 115 | struct udf_inode_info *iinfo; |
1da177e4 LT |
116 | if (!(inode->i_sb->s_flags & MS_RDONLY)) { |
117 | lock_kernel(); | |
74584ae5 | 118 | /* Discard preallocation for directories, symlinks, etc. */ |
1da177e4 | 119 | udf_discard_prealloc(inode); |
74584ae5 | 120 | udf_truncate_tail_extent(inode); |
1da177e4 | 121 | unlock_kernel(); |
74584ae5 | 122 | write_inode_now(inode, 1); |
1da177e4 | 123 | } |
48d6d8ff MS |
124 | iinfo = UDF_I(inode); |
125 | kfree(iinfo->i_ext.i_data); | |
126 | iinfo->i_ext.i_data = NULL; | |
1da177e4 LT |
127 | } |
128 | ||
129 | static int udf_writepage(struct page *page, struct writeback_control *wbc) | |
130 | { | |
131 | return block_write_full_page(page, udf_get_block, wbc); | |
132 | } | |
133 | ||
134 | static int udf_readpage(struct file *file, struct page *page) | |
135 | { | |
136 | return block_read_full_page(page, udf_get_block); | |
137 | } | |
138 | ||
be021ee4 NP |
139 | static int udf_write_begin(struct file *file, struct address_space *mapping, |
140 | loff_t pos, unsigned len, unsigned flags, | |
141 | struct page **pagep, void **fsdata) | |
1da177e4 | 142 | { |
be021ee4 NP |
143 | *pagep = NULL; |
144 | return block_write_begin(file, mapping, pos, len, flags, pagep, fsdata, | |
145 | udf_get_block); | |
1da177e4 LT |
146 | } |
147 | ||
148 | static sector_t udf_bmap(struct address_space *mapping, sector_t block) | |
149 | { | |
cb00ea35 | 150 | return generic_block_bmap(mapping, block, udf_get_block); |
1da177e4 LT |
151 | } |
152 | ||
f5e54d6e | 153 | const struct address_space_operations udf_aops = { |
28de7948 CG |
154 | .readpage = udf_readpage, |
155 | .writepage = udf_writepage, | |
156 | .sync_page = block_sync_page, | |
be021ee4 NP |
157 | .write_begin = udf_write_begin, |
158 | .write_end = generic_write_end, | |
28de7948 | 159 | .bmap = udf_bmap, |
1da177e4 LT |
160 | }; |
161 | ||
cb00ea35 | 162 | void udf_expand_file_adinicb(struct inode *inode, int newsize, int *err) |
1da177e4 LT |
163 | { |
164 | struct page *page; | |
165 | char *kaddr; | |
48d6d8ff | 166 | struct udf_inode_info *iinfo = UDF_I(inode); |
1da177e4 LT |
167 | struct writeback_control udf_wbc = { |
168 | .sync_mode = WB_SYNC_NONE, | |
169 | .nr_to_write = 1, | |
170 | }; | |
171 | ||
172 | /* from now on we have normal address_space methods */ | |
173 | inode->i_data.a_ops = &udf_aops; | |
174 | ||
48d6d8ff | 175 | if (!iinfo->i_lenAlloc) { |
1da177e4 | 176 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) |
48d6d8ff | 177 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT; |
1da177e4 | 178 | else |
48d6d8ff | 179 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG; |
1da177e4 LT |
180 | mark_inode_dirty(inode); |
181 | return; | |
182 | } | |
183 | ||
184 | page = grab_cache_page(inode->i_mapping, 0); | |
cd7619d6 MM |
185 | BUG_ON(!PageLocked(page)); |
186 | ||
cb00ea35 | 187 | if (!PageUptodate(page)) { |
1da177e4 | 188 | kaddr = kmap(page); |
48d6d8ff MS |
189 | memset(kaddr + iinfo->i_lenAlloc, 0x00, |
190 | PAGE_CACHE_SIZE - iinfo->i_lenAlloc); | |
191 | memcpy(kaddr, iinfo->i_ext.i_data + iinfo->i_lenEAttr, | |
192 | iinfo->i_lenAlloc); | |
1da177e4 LT |
193 | flush_dcache_page(page); |
194 | SetPageUptodate(page); | |
195 | kunmap(page); | |
196 | } | |
48d6d8ff MS |
197 | memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr, 0x00, |
198 | iinfo->i_lenAlloc); | |
199 | iinfo->i_lenAlloc = 0; | |
1da177e4 | 200 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) |
48d6d8ff | 201 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT; |
1da177e4 | 202 | else |
48d6d8ff | 203 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG; |
1da177e4 LT |
204 | |
205 | inode->i_data.a_ops->writepage(page, &udf_wbc); | |
206 | page_cache_release(page); | |
207 | ||
208 | mark_inode_dirty(inode); | |
209 | } | |
210 | ||
cb00ea35 CG |
211 | struct buffer_head *udf_expand_dir_adinicb(struct inode *inode, int *block, |
212 | int *err) | |
1da177e4 LT |
213 | { |
214 | int newblock; | |
ff116fc8 JK |
215 | struct buffer_head *dbh = NULL; |
216 | kernel_lb_addr eloc; | |
217 | uint32_t elen; | |
1da177e4 | 218 | uint8_t alloctype; |
ff116fc8 | 219 | struct extent_position epos; |
1da177e4 LT |
220 | |
221 | struct udf_fileident_bh sfibh, dfibh; | |
222 | loff_t f_pos = udf_ext0_offset(inode) >> 2; | |
223 | int size = (udf_ext0_offset(inode) + inode->i_size) >> 2; | |
224 | struct fileIdentDesc cfi, *sfi, *dfi; | |
48d6d8ff | 225 | struct udf_inode_info *iinfo = UDF_I(inode); |
1da177e4 LT |
226 | |
227 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) | |
228 | alloctype = ICBTAG_FLAG_AD_SHORT; | |
229 | else | |
230 | alloctype = ICBTAG_FLAG_AD_LONG; | |
231 | ||
cb00ea35 | 232 | if (!inode->i_size) { |
48d6d8ff | 233 | iinfo->i_alloc_type = alloctype; |
1da177e4 LT |
234 | mark_inode_dirty(inode); |
235 | return NULL; | |
236 | } | |
237 | ||
238 | /* alloc block, and copy data to it */ | |
239 | *block = udf_new_block(inode->i_sb, inode, | |
48d6d8ff MS |
240 | iinfo->i_location.partitionReferenceNum, |
241 | iinfo->i_location.logicalBlockNum, err); | |
1da177e4 LT |
242 | if (!(*block)) |
243 | return NULL; | |
244 | newblock = udf_get_pblock(inode->i_sb, *block, | |
48d6d8ff | 245 | iinfo->i_location.partitionReferenceNum, |
c0b34438 | 246 | 0); |
1da177e4 LT |
247 | if (!newblock) |
248 | return NULL; | |
249 | dbh = udf_tgetblk(inode->i_sb, newblock); | |
250 | if (!dbh) | |
251 | return NULL; | |
252 | lock_buffer(dbh); | |
253 | memset(dbh->b_data, 0x00, inode->i_sb->s_blocksize); | |
254 | set_buffer_uptodate(dbh); | |
255 | unlock_buffer(dbh); | |
256 | mark_buffer_dirty_inode(dbh, inode); | |
257 | ||
4b11111a MS |
258 | sfibh.soffset = sfibh.eoffset = |
259 | (f_pos & ((inode->i_sb->s_blocksize - 1) >> 2)) << 2; | |
ff116fc8 | 260 | sfibh.sbh = sfibh.ebh = NULL; |
1da177e4 LT |
261 | dfibh.soffset = dfibh.eoffset = 0; |
262 | dfibh.sbh = dfibh.ebh = dbh; | |
cb00ea35 | 263 | while ((f_pos < size)) { |
48d6d8ff | 264 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB; |
4b11111a MS |
265 | sfi = udf_fileident_read(inode, &f_pos, &sfibh, &cfi, NULL, |
266 | NULL, NULL, NULL); | |
cb00ea35 | 267 | if (!sfi) { |
3bf25cb4 | 268 | brelse(dbh); |
1da177e4 LT |
269 | return NULL; |
270 | } | |
48d6d8ff | 271 | iinfo->i_alloc_type = alloctype; |
1da177e4 LT |
272 | sfi->descTag.tagLocation = cpu_to_le32(*block); |
273 | dfibh.soffset = dfibh.eoffset; | |
274 | dfibh.eoffset += (sfibh.eoffset - sfibh.soffset); | |
275 | dfi = (struct fileIdentDesc *)(dbh->b_data + dfibh.soffset); | |
276 | if (udf_write_fi(inode, sfi, dfi, &dfibh, sfi->impUse, | |
4b11111a MS |
277 | sfi->fileIdent + |
278 | le16_to_cpu(sfi->lengthOfImpUse))) { | |
48d6d8ff | 279 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB; |
3bf25cb4 | 280 | brelse(dbh); |
1da177e4 LT |
281 | return NULL; |
282 | } | |
283 | } | |
284 | mark_buffer_dirty_inode(dbh, inode); | |
285 | ||
48d6d8ff MS |
286 | memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr, 0, |
287 | iinfo->i_lenAlloc); | |
288 | iinfo->i_lenAlloc = 0; | |
1da177e4 | 289 | eloc.logicalBlockNum = *block; |
4b11111a | 290 | eloc.partitionReferenceNum = |
48d6d8ff | 291 | iinfo->i_location.partitionReferenceNum; |
1da177e4 | 292 | elen = inode->i_size; |
48d6d8ff | 293 | iinfo->i_lenExtents = elen; |
ff116fc8 | 294 | epos.bh = NULL; |
48d6d8ff | 295 | epos.block = iinfo->i_location; |
ff116fc8 JK |
296 | epos.offset = udf_file_entry_alloc_offset(inode); |
297 | udf_add_aext(inode, &epos, eloc, elen, 0); | |
1da177e4 LT |
298 | /* UniqueID stuff */ |
299 | ||
3bf25cb4 | 300 | brelse(epos.bh); |
1da177e4 LT |
301 | mark_inode_dirty(inode); |
302 | return dbh; | |
303 | } | |
304 | ||
cb00ea35 CG |
305 | static int udf_get_block(struct inode *inode, sector_t block, |
306 | struct buffer_head *bh_result, int create) | |
1da177e4 LT |
307 | { |
308 | int err, new; | |
309 | struct buffer_head *bh; | |
1ed16171 | 310 | sector_t phys = 0; |
48d6d8ff | 311 | struct udf_inode_info *iinfo; |
1da177e4 | 312 | |
cb00ea35 | 313 | if (!create) { |
1da177e4 LT |
314 | phys = udf_block_map(inode, block); |
315 | if (phys) | |
316 | map_bh(bh_result, inode->i_sb, phys); | |
317 | return 0; | |
318 | } | |
319 | ||
320 | err = -EIO; | |
321 | new = 0; | |
322 | bh = NULL; | |
323 | ||
324 | lock_kernel(); | |
325 | ||
326 | if (block < 0) | |
327 | goto abort_negative; | |
328 | ||
48d6d8ff MS |
329 | iinfo = UDF_I(inode); |
330 | if (block == iinfo->i_next_alloc_block + 1) { | |
331 | iinfo->i_next_alloc_block++; | |
332 | iinfo->i_next_alloc_goal++; | |
1da177e4 LT |
333 | } |
334 | ||
335 | err = 0; | |
336 | ||
337 | bh = inode_getblk(inode, block, &err, &phys, &new); | |
2c2111c2 | 338 | BUG_ON(bh); |
1da177e4 LT |
339 | if (err) |
340 | goto abort; | |
2c2111c2 | 341 | BUG_ON(!phys); |
1da177e4 LT |
342 | |
343 | if (new) | |
344 | set_buffer_new(bh_result); | |
345 | map_bh(bh_result, inode->i_sb, phys); | |
28de7948 CG |
346 | |
347 | abort: | |
1da177e4 LT |
348 | unlock_kernel(); |
349 | return err; | |
350 | ||
28de7948 | 351 | abort_negative: |
1da177e4 LT |
352 | udf_warning(inode->i_sb, "udf_get_block", "block < 0"); |
353 | goto abort; | |
354 | } | |
355 | ||
cb00ea35 CG |
356 | static struct buffer_head *udf_getblk(struct inode *inode, long block, |
357 | int create, int *err) | |
1da177e4 | 358 | { |
28de7948 | 359 | struct buffer_head *bh; |
1da177e4 LT |
360 | struct buffer_head dummy; |
361 | ||
362 | dummy.b_state = 0; | |
363 | dummy.b_blocknr = -1000; | |
364 | *err = udf_get_block(inode, block, &dummy, create); | |
cb00ea35 | 365 | if (!*err && buffer_mapped(&dummy)) { |
1da177e4 | 366 | bh = sb_getblk(inode->i_sb, dummy.b_blocknr); |
cb00ea35 | 367 | if (buffer_new(&dummy)) { |
1da177e4 LT |
368 | lock_buffer(bh); |
369 | memset(bh->b_data, 0x00, inode->i_sb->s_blocksize); | |
370 | set_buffer_uptodate(bh); | |
371 | unlock_buffer(bh); | |
372 | mark_buffer_dirty_inode(bh, inode); | |
373 | } | |
374 | return bh; | |
375 | } | |
28de7948 | 376 | |
1da177e4 LT |
377 | return NULL; |
378 | } | |
379 | ||
31170b6a JK |
380 | /* Extend the file by 'blocks' blocks, return the number of extents added */ |
381 | int udf_extend_file(struct inode *inode, struct extent_position *last_pos, | |
4b11111a | 382 | kernel_long_ad *last_ext, sector_t blocks) |
31170b6a JK |
383 | { |
384 | sector_t add; | |
385 | int count = 0, fake = !(last_ext->extLength & UDF_EXTENT_LENGTH_MASK); | |
386 | struct super_block *sb = inode->i_sb; | |
28de7948 | 387 | kernel_lb_addr prealloc_loc = {}; |
31170b6a | 388 | int prealloc_len = 0; |
48d6d8ff | 389 | struct udf_inode_info *iinfo; |
31170b6a JK |
390 | |
391 | /* The previous extent is fake and we should not extend by anything | |
392 | * - there's nothing to do... */ | |
393 | if (!blocks && fake) | |
394 | return 0; | |
28de7948 | 395 | |
48d6d8ff | 396 | iinfo = UDF_I(inode); |
31170b6a JK |
397 | /* Round the last extent up to a multiple of block size */ |
398 | if (last_ext->extLength & (sb->s_blocksize - 1)) { | |
399 | last_ext->extLength = | |
28de7948 CG |
400 | (last_ext->extLength & UDF_EXTENT_FLAG_MASK) | |
401 | (((last_ext->extLength & UDF_EXTENT_LENGTH_MASK) + | |
402 | sb->s_blocksize - 1) & ~(sb->s_blocksize - 1)); | |
48d6d8ff MS |
403 | iinfo->i_lenExtents = |
404 | (iinfo->i_lenExtents + sb->s_blocksize - 1) & | |
28de7948 | 405 | ~(sb->s_blocksize - 1); |
31170b6a | 406 | } |
28de7948 | 407 | |
31170b6a | 408 | /* Last extent are just preallocated blocks? */ |
4b11111a MS |
409 | if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) == |
410 | EXT_NOT_RECORDED_ALLOCATED) { | |
31170b6a JK |
411 | /* Save the extent so that we can reattach it to the end */ |
412 | prealloc_loc = last_ext->extLocation; | |
413 | prealloc_len = last_ext->extLength; | |
414 | /* Mark the extent as a hole */ | |
415 | last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | | |
28de7948 | 416 | (last_ext->extLength & UDF_EXTENT_LENGTH_MASK); |
31170b6a | 417 | last_ext->extLocation.logicalBlockNum = 0; |
4b11111a | 418 | last_ext->extLocation.partitionReferenceNum = 0; |
31170b6a | 419 | } |
28de7948 | 420 | |
31170b6a | 421 | /* Can we merge with the previous extent? */ |
4b11111a MS |
422 | if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) == |
423 | EXT_NOT_RECORDED_NOT_ALLOCATED) { | |
424 | add = ((1 << 30) - sb->s_blocksize - | |
425 | (last_ext->extLength & UDF_EXTENT_LENGTH_MASK)) >> | |
426 | sb->s_blocksize_bits; | |
31170b6a JK |
427 | if (add > blocks) |
428 | add = blocks; | |
429 | blocks -= add; | |
430 | last_ext->extLength += add << sb->s_blocksize_bits; | |
431 | } | |
432 | ||
433 | if (fake) { | |
434 | udf_add_aext(inode, last_pos, last_ext->extLocation, | |
cb00ea35 | 435 | last_ext->extLength, 1); |
31170b6a | 436 | count++; |
4b11111a MS |
437 | } else |
438 | udf_write_aext(inode, last_pos, last_ext->extLocation, | |
439 | last_ext->extLength, 1); | |
28de7948 | 440 | |
31170b6a JK |
441 | /* Managed to do everything necessary? */ |
442 | if (!blocks) | |
443 | goto out; | |
444 | ||
445 | /* All further extents will be NOT_RECORDED_NOT_ALLOCATED */ | |
446 | last_ext->extLocation.logicalBlockNum = 0; | |
4b11111a | 447 | last_ext->extLocation.partitionReferenceNum = 0; |
28de7948 | 448 | add = (1 << (30-sb->s_blocksize_bits)) - 1; |
4b11111a MS |
449 | last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | |
450 | (add << sb->s_blocksize_bits); | |
28de7948 | 451 | |
31170b6a JK |
452 | /* Create enough extents to cover the whole hole */ |
453 | while (blocks > add) { | |
454 | blocks -= add; | |
455 | if (udf_add_aext(inode, last_pos, last_ext->extLocation, | |
cb00ea35 | 456 | last_ext->extLength, 1) == -1) |
31170b6a JK |
457 | return -1; |
458 | count++; | |
459 | } | |
460 | if (blocks) { | |
461 | last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | | |
28de7948 | 462 | (blocks << sb->s_blocksize_bits); |
31170b6a | 463 | if (udf_add_aext(inode, last_pos, last_ext->extLocation, |
cb00ea35 | 464 | last_ext->extLength, 1) == -1) |
31170b6a JK |
465 | return -1; |
466 | count++; | |
467 | } | |
28de7948 CG |
468 | |
469 | out: | |
31170b6a JK |
470 | /* Do we have some preallocated blocks saved? */ |
471 | if (prealloc_len) { | |
4b11111a MS |
472 | if (udf_add_aext(inode, last_pos, prealloc_loc, |
473 | prealloc_len, 1) == -1) | |
31170b6a JK |
474 | return -1; |
475 | last_ext->extLocation = prealloc_loc; | |
476 | last_ext->extLength = prealloc_len; | |
477 | count++; | |
478 | } | |
28de7948 | 479 | |
31170b6a | 480 | /* last_pos should point to the last written extent... */ |
48d6d8ff | 481 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
31170b6a | 482 | last_pos->offset -= sizeof(short_ad); |
48d6d8ff | 483 | else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
31170b6a JK |
484 | last_pos->offset -= sizeof(long_ad); |
485 | else | |
486 | return -1; | |
28de7948 | 487 | |
31170b6a JK |
488 | return count; |
489 | } | |
490 | ||
cb00ea35 | 491 | static struct buffer_head *inode_getblk(struct inode *inode, sector_t block, |
1ed16171 | 492 | int *err, sector_t *phys, int *new) |
1da177e4 | 493 | { |
31170b6a | 494 | static sector_t last_block; |
ff116fc8 | 495 | struct buffer_head *result = NULL; |
1da177e4 | 496 | kernel_long_ad laarr[EXTENT_MERGE_SIZE]; |
ff116fc8 | 497 | struct extent_position prev_epos, cur_epos, next_epos; |
1da177e4 | 498 | int count = 0, startnum = 0, endnum = 0; |
85d71244 JK |
499 | uint32_t elen = 0, tmpelen; |
500 | kernel_lb_addr eloc, tmpeloc; | |
1da177e4 | 501 | int c = 1; |
60448b1d JK |
502 | loff_t lbcount = 0, b_off = 0; |
503 | uint32_t newblocknum, newblock; | |
504 | sector_t offset = 0; | |
1da177e4 | 505 | int8_t etype; |
48d6d8ff MS |
506 | struct udf_inode_info *iinfo = UDF_I(inode); |
507 | int goal = 0, pgoal = iinfo->i_location.logicalBlockNum; | |
31170b6a | 508 | int lastblock = 0; |
1da177e4 | 509 | |
ff116fc8 | 510 | prev_epos.offset = udf_file_entry_alloc_offset(inode); |
48d6d8ff | 511 | prev_epos.block = iinfo->i_location; |
ff116fc8 JK |
512 | prev_epos.bh = NULL; |
513 | cur_epos = next_epos = prev_epos; | |
28de7948 | 514 | b_off = (loff_t)block << inode->i_sb->s_blocksize_bits; |
1da177e4 LT |
515 | |
516 | /* find the extent which contains the block we are looking for. | |
cb00ea35 CG |
517 | alternate between laarr[0] and laarr[1] for locations of the |
518 | current extent, and the previous extent */ | |
519 | do { | |
520 | if (prev_epos.bh != cur_epos.bh) { | |
3bf25cb4 JK |
521 | brelse(prev_epos.bh); |
522 | get_bh(cur_epos.bh); | |
ff116fc8 | 523 | prev_epos.bh = cur_epos.bh; |
1da177e4 | 524 | } |
cb00ea35 | 525 | if (cur_epos.bh != next_epos.bh) { |
3bf25cb4 JK |
526 | brelse(cur_epos.bh); |
527 | get_bh(next_epos.bh); | |
ff116fc8 | 528 | cur_epos.bh = next_epos.bh; |
1da177e4 LT |
529 | } |
530 | ||
531 | lbcount += elen; | |
532 | ||
ff116fc8 JK |
533 | prev_epos.block = cur_epos.block; |
534 | cur_epos.block = next_epos.block; | |
1da177e4 | 535 | |
ff116fc8 JK |
536 | prev_epos.offset = cur_epos.offset; |
537 | cur_epos.offset = next_epos.offset; | |
1da177e4 | 538 | |
4b11111a MS |
539 | etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 1); |
540 | if (etype == -1) | |
1da177e4 LT |
541 | break; |
542 | ||
543 | c = !c; | |
544 | ||
545 | laarr[c].extLength = (etype << 30) | elen; | |
546 | laarr[c].extLocation = eloc; | |
547 | ||
548 | if (etype != (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) | |
549 | pgoal = eloc.logicalBlockNum + | |
28de7948 CG |
550 | ((elen + inode->i_sb->s_blocksize - 1) >> |
551 | inode->i_sb->s_blocksize_bits); | |
1da177e4 | 552 | |
cb00ea35 | 553 | count++; |
1da177e4 LT |
554 | } while (lbcount + elen <= b_off); |
555 | ||
556 | b_off -= lbcount; | |
557 | offset = b_off >> inode->i_sb->s_blocksize_bits; | |
85d71244 JK |
558 | /* |
559 | * Move prev_epos and cur_epos into indirect extent if we are at | |
560 | * the pointer to it | |
561 | */ | |
562 | udf_next_aext(inode, &prev_epos, &tmpeloc, &tmpelen, 0); | |
563 | udf_next_aext(inode, &cur_epos, &tmpeloc, &tmpelen, 0); | |
1da177e4 LT |
564 | |
565 | /* if the extent is allocated and recorded, return the block | |
cb00ea35 | 566 | if the extent is not a multiple of the blocksize, round up */ |
1da177e4 | 567 | |
cb00ea35 CG |
568 | if (etype == (EXT_RECORDED_ALLOCATED >> 30)) { |
569 | if (elen & (inode->i_sb->s_blocksize - 1)) { | |
1da177e4 | 570 | elen = EXT_RECORDED_ALLOCATED | |
28de7948 CG |
571 | ((elen + inode->i_sb->s_blocksize - 1) & |
572 | ~(inode->i_sb->s_blocksize - 1)); | |
ff116fc8 | 573 | etype = udf_write_aext(inode, &cur_epos, eloc, elen, 1); |
1da177e4 | 574 | } |
3bf25cb4 JK |
575 | brelse(prev_epos.bh); |
576 | brelse(cur_epos.bh); | |
577 | brelse(next_epos.bh); | |
1da177e4 LT |
578 | newblock = udf_get_lb_pblock(inode->i_sb, eloc, offset); |
579 | *phys = newblock; | |
580 | return NULL; | |
581 | } | |
582 | ||
31170b6a JK |
583 | last_block = block; |
584 | /* Are we beyond EOF? */ | |
cb00ea35 | 585 | if (etype == -1) { |
31170b6a JK |
586 | int ret; |
587 | ||
588 | if (count) { | |
589 | if (c) | |
590 | laarr[0] = laarr[1]; | |
591 | startnum = 1; | |
cb00ea35 | 592 | } else { |
31170b6a | 593 | /* Create a fake extent when there's not one */ |
4b11111a MS |
594 | memset(&laarr[0].extLocation, 0x00, |
595 | sizeof(kernel_lb_addr)); | |
31170b6a | 596 | laarr[0].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED; |
4b11111a MS |
597 | /* Will udf_extend_file() create real extent from |
598 | a fake one? */ | |
31170b6a JK |
599 | startnum = (offset > 0); |
600 | } | |
601 | /* Create extents for the hole between EOF and offset */ | |
602 | ret = udf_extend_file(inode, &prev_epos, laarr, offset); | |
603 | if (ret == -1) { | |
604 | brelse(prev_epos.bh); | |
605 | brelse(cur_epos.bh); | |
606 | brelse(next_epos.bh); | |
607 | /* We don't really know the error here so we just make | |
608 | * something up */ | |
609 | *err = -ENOSPC; | |
610 | return NULL; | |
611 | } | |
612 | c = 0; | |
613 | offset = 0; | |
614 | count += ret; | |
615 | /* We are not covered by a preallocated extent? */ | |
4b11111a MS |
616 | if ((laarr[0].extLength & UDF_EXTENT_FLAG_MASK) != |
617 | EXT_NOT_RECORDED_ALLOCATED) { | |
31170b6a JK |
618 | /* Is there any real extent? - otherwise we overwrite |
619 | * the fake one... */ | |
620 | if (count) | |
621 | c = !c; | |
622 | laarr[c].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | | |
28de7948 | 623 | inode->i_sb->s_blocksize; |
4b11111a MS |
624 | memset(&laarr[c].extLocation, 0x00, |
625 | sizeof(kernel_lb_addr)); | |
cb00ea35 CG |
626 | count++; |
627 | endnum++; | |
31170b6a | 628 | } |
cb00ea35 | 629 | endnum = c + 1; |
1da177e4 | 630 | lastblock = 1; |
cb00ea35 | 631 | } else { |
1da177e4 LT |
632 | endnum = startnum = ((count > 2) ? 2 : count); |
633 | ||
4b11111a MS |
634 | /* if the current extent is in position 0, |
635 | swap it with the previous */ | |
cb00ea35 | 636 | if (!c && count != 1) { |
31170b6a JK |
637 | laarr[2] = laarr[0]; |
638 | laarr[0] = laarr[1]; | |
639 | laarr[1] = laarr[2]; | |
640 | c = 1; | |
641 | } | |
1da177e4 | 642 | |
4b11111a MS |
643 | /* if the current block is located in an extent, |
644 | read the next extent */ | |
645 | etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 0); | |
646 | if (etype != -1) { | |
cb00ea35 CG |
647 | laarr[c + 1].extLength = (etype << 30) | elen; |
648 | laarr[c + 1].extLocation = eloc; | |
649 | count++; | |
650 | startnum++; | |
651 | endnum++; | |
4b11111a | 652 | } else |
1da177e4 LT |
653 | lastblock = 1; |
654 | } | |
1da177e4 LT |
655 | |
656 | /* if the current extent is not recorded but allocated, get the | |
28de7948 | 657 | * block in the extent corresponding to the requested block */ |
4b11111a | 658 | if ((laarr[c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30)) |
1da177e4 | 659 | newblocknum = laarr[c].extLocation.logicalBlockNum + offset; |
4b11111a | 660 | else { /* otherwise, allocate a new block */ |
48d6d8ff MS |
661 | if (iinfo->i_next_alloc_block == block) |
662 | goal = iinfo->i_next_alloc_goal; | |
1da177e4 | 663 | |
cb00ea35 | 664 | if (!goal) { |
4b11111a | 665 | if (!(goal = pgoal)) /* XXX: what was intended here? */ |
48d6d8ff | 666 | goal = iinfo->i_location.logicalBlockNum + 1; |
1da177e4 LT |
667 | } |
668 | ||
4b11111a | 669 | newblocknum = udf_new_block(inode->i_sb, inode, |
48d6d8ff | 670 | iinfo->i_location.partitionReferenceNum, |
4b11111a MS |
671 | goal, err); |
672 | if (!newblocknum) { | |
3bf25cb4 | 673 | brelse(prev_epos.bh); |
1da177e4 LT |
674 | *err = -ENOSPC; |
675 | return NULL; | |
676 | } | |
48d6d8ff | 677 | iinfo->i_lenExtents += inode->i_sb->s_blocksize; |
1da177e4 LT |
678 | } |
679 | ||
4b11111a MS |
680 | /* if the extent the requsted block is located in contains multiple |
681 | * blocks, split the extent into at most three extents. blocks prior | |
682 | * to requested block, requested block, and blocks after requested | |
683 | * block */ | |
1da177e4 LT |
684 | udf_split_extents(inode, &c, offset, newblocknum, laarr, &endnum); |
685 | ||
686 | #ifdef UDF_PREALLOCATE | |
687 | /* preallocate blocks */ | |
688 | udf_prealloc_extents(inode, c, lastblock, laarr, &endnum); | |
689 | #endif | |
690 | ||
691 | /* merge any continuous blocks in laarr */ | |
692 | udf_merge_extents(inode, laarr, &endnum); | |
693 | ||
694 | /* write back the new extents, inserting new extents if the new number | |
28de7948 CG |
695 | * of extents is greater than the old number, and deleting extents if |
696 | * the new number of extents is less than the old number */ | |
ff116fc8 | 697 | udf_update_extents(inode, laarr, startnum, endnum, &prev_epos); |
1da177e4 | 698 | |
3bf25cb4 | 699 | brelse(prev_epos.bh); |
1da177e4 | 700 | |
4b11111a | 701 | newblock = udf_get_pblock(inode->i_sb, newblocknum, |
48d6d8ff | 702 | iinfo->i_location.partitionReferenceNum, 0); |
4b11111a | 703 | if (!newblock) |
1da177e4 | 704 | return NULL; |
1da177e4 LT |
705 | *phys = newblock; |
706 | *err = 0; | |
707 | *new = 1; | |
48d6d8ff MS |
708 | iinfo->i_next_alloc_block = block; |
709 | iinfo->i_next_alloc_goal = newblocknum; | |
1da177e4 LT |
710 | inode->i_ctime = current_fs_time(inode->i_sb); |
711 | ||
712 | if (IS_SYNC(inode)) | |
713 | udf_sync_inode(inode); | |
714 | else | |
715 | mark_inode_dirty(inode); | |
28de7948 | 716 | |
1da177e4 LT |
717 | return result; |
718 | } | |
719 | ||
cb00ea35 CG |
720 | static void udf_split_extents(struct inode *inode, int *c, int offset, |
721 | int newblocknum, | |
722 | kernel_long_ad laarr[EXTENT_MERGE_SIZE], | |
723 | int *endnum) | |
1da177e4 | 724 | { |
4b11111a MS |
725 | unsigned long blocksize = inode->i_sb->s_blocksize; |
726 | unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; | |
727 | ||
1da177e4 | 728 | if ((laarr[*c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30) || |
4b11111a MS |
729 | (laarr[*c].extLength >> 30) == |
730 | (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) { | |
1da177e4 LT |
731 | int curr = *c; |
732 | int blen = ((laarr[curr].extLength & UDF_EXTENT_LENGTH_MASK) + | |
4b11111a | 733 | blocksize - 1) >> blocksize_bits; |
1da177e4 LT |
734 | int8_t etype = (laarr[curr].extLength >> 30); |
735 | ||
4b11111a | 736 | if (blen == 1) |
28de7948 | 737 | ; |
4b11111a | 738 | else if (!offset || blen == offset + 1) { |
cb00ea35 CG |
739 | laarr[curr + 2] = laarr[curr + 1]; |
740 | laarr[curr + 1] = laarr[curr]; | |
741 | } else { | |
742 | laarr[curr + 3] = laarr[curr + 1]; | |
743 | laarr[curr + 2] = laarr[curr + 1] = laarr[curr]; | |
744 | } | |
745 | ||
746 | if (offset) { | |
747 | if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30)) { | |
4b11111a MS |
748 | udf_free_blocks(inode->i_sb, inode, |
749 | laarr[curr].extLocation, | |
750 | 0, offset); | |
751 | laarr[curr].extLength = | |
752 | EXT_NOT_RECORDED_NOT_ALLOCATED | | |
753 | (offset << blocksize_bits); | |
1da177e4 | 754 | laarr[curr].extLocation.logicalBlockNum = 0; |
4b11111a MS |
755 | laarr[curr].extLocation. |
756 | partitionReferenceNum = 0; | |
757 | } else | |
1da177e4 | 758 | laarr[curr].extLength = (etype << 30) | |
4b11111a | 759 | (offset << blocksize_bits); |
cb00ea35 CG |
760 | curr++; |
761 | (*c)++; | |
762 | (*endnum)++; | |
1da177e4 | 763 | } |
647bd61a | 764 | |
1da177e4 LT |
765 | laarr[curr].extLocation.logicalBlockNum = newblocknum; |
766 | if (etype == (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) | |
767 | laarr[curr].extLocation.partitionReferenceNum = | |
c0b34438 | 768 | UDF_I(inode)->i_location.partitionReferenceNum; |
1da177e4 | 769 | laarr[curr].extLength = EXT_RECORDED_ALLOCATED | |
4b11111a | 770 | blocksize; |
cb00ea35 | 771 | curr++; |
1da177e4 | 772 | |
cb00ea35 | 773 | if (blen != offset + 1) { |
1da177e4 | 774 | if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30)) |
4b11111a MS |
775 | laarr[curr].extLocation.logicalBlockNum += |
776 | offset + 1; | |
28de7948 | 777 | laarr[curr].extLength = (etype << 30) | |
4b11111a | 778 | ((blen - (offset + 1)) << blocksize_bits); |
cb00ea35 CG |
779 | curr++; |
780 | (*endnum)++; | |
1da177e4 LT |
781 | } |
782 | } | |
783 | } | |
784 | ||
785 | static void udf_prealloc_extents(struct inode *inode, int c, int lastblock, | |
cb00ea35 CG |
786 | kernel_long_ad laarr[EXTENT_MERGE_SIZE], |
787 | int *endnum) | |
1da177e4 LT |
788 | { |
789 | int start, length = 0, currlength = 0, i; | |
790 | ||
cb00ea35 | 791 | if (*endnum >= (c + 1)) { |
1da177e4 LT |
792 | if (!lastblock) |
793 | return; | |
794 | else | |
795 | start = c; | |
cb00ea35 | 796 | } else { |
4b11111a MS |
797 | if ((laarr[c + 1].extLength >> 30) == |
798 | (EXT_NOT_RECORDED_ALLOCATED >> 30)) { | |
cb00ea35 | 799 | start = c + 1; |
4b11111a MS |
800 | length = currlength = |
801 | (((laarr[c + 1].extLength & | |
802 | UDF_EXTENT_LENGTH_MASK) + | |
803 | inode->i_sb->s_blocksize - 1) >> | |
804 | inode->i_sb->s_blocksize_bits); | |
805 | } else | |
1da177e4 LT |
806 | start = c; |
807 | } | |
808 | ||
cb00ea35 CG |
809 | for (i = start + 1; i <= *endnum; i++) { |
810 | if (i == *endnum) { | |
1da177e4 LT |
811 | if (lastblock) |
812 | length += UDF_DEFAULT_PREALLOC_BLOCKS; | |
4b11111a MS |
813 | } else if ((laarr[i].extLength >> 30) == |
814 | (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) { | |
815 | length += (((laarr[i].extLength & | |
816 | UDF_EXTENT_LENGTH_MASK) + | |
817 | inode->i_sb->s_blocksize - 1) >> | |
818 | inode->i_sb->s_blocksize_bits); | |
819 | } else | |
1da177e4 LT |
820 | break; |
821 | } | |
822 | ||
cb00ea35 | 823 | if (length) { |
1da177e4 | 824 | int next = laarr[start].extLocation.logicalBlockNum + |
28de7948 | 825 | (((laarr[start].extLength & UDF_EXTENT_LENGTH_MASK) + |
4b11111a MS |
826 | inode->i_sb->s_blocksize - 1) >> |
827 | inode->i_sb->s_blocksize_bits); | |
1da177e4 | 828 | int numalloc = udf_prealloc_blocks(inode->i_sb, inode, |
4b11111a MS |
829 | laarr[start].extLocation.partitionReferenceNum, |
830 | next, (UDF_DEFAULT_PREALLOC_BLOCKS > length ? | |
831 | length : UDF_DEFAULT_PREALLOC_BLOCKS) - | |
832 | currlength); | |
28de7948 | 833 | if (numalloc) { |
4b11111a | 834 | if (start == (c + 1)) |
1da177e4 | 835 | laarr[start].extLength += |
4b11111a MS |
836 | (numalloc << |
837 | inode->i_sb->s_blocksize_bits); | |
838 | else { | |
cb00ea35 CG |
839 | memmove(&laarr[c + 2], &laarr[c + 1], |
840 | sizeof(long_ad) * (*endnum - (c + 1))); | |
841 | (*endnum)++; | |
842 | laarr[c + 1].extLocation.logicalBlockNum = next; | |
843 | laarr[c + 1].extLocation.partitionReferenceNum = | |
4b11111a MS |
844 | laarr[c].extLocation. |
845 | partitionReferenceNum; | |
846 | laarr[c + 1].extLength = | |
847 | EXT_NOT_RECORDED_ALLOCATED | | |
848 | (numalloc << | |
849 | inode->i_sb->s_blocksize_bits); | |
cb00ea35 | 850 | start = c + 1; |
1da177e4 LT |
851 | } |
852 | ||
cb00ea35 | 853 | for (i = start + 1; numalloc && i < *endnum; i++) { |
4b11111a MS |
854 | int elen = ((laarr[i].extLength & |
855 | UDF_EXTENT_LENGTH_MASK) + | |
856 | inode->i_sb->s_blocksize - 1) >> | |
857 | inode->i_sb->s_blocksize_bits; | |
1da177e4 | 858 | |
cb00ea35 | 859 | if (elen > numalloc) { |
1da177e4 | 860 | laarr[i].extLength -= |
4b11111a MS |
861 | (numalloc << |
862 | inode->i_sb->s_blocksize_bits); | |
1da177e4 | 863 | numalloc = 0; |
cb00ea35 | 864 | } else { |
1da177e4 | 865 | numalloc -= elen; |
cb00ea35 | 866 | if (*endnum > (i + 1)) |
4b11111a MS |
867 | memmove(&laarr[i], |
868 | &laarr[i + 1], | |
869 | sizeof(long_ad) * | |
870 | (*endnum - (i + 1))); | |
cb00ea35 CG |
871 | i--; |
872 | (*endnum)--; | |
1da177e4 LT |
873 | } |
874 | } | |
c0b34438 | 875 | UDF_I(inode)->i_lenExtents += |
4b11111a | 876 | numalloc << inode->i_sb->s_blocksize_bits; |
1da177e4 LT |
877 | } |
878 | } | |
879 | } | |
880 | ||
881 | static void udf_merge_extents(struct inode *inode, | |
cb00ea35 CG |
882 | kernel_long_ad laarr[EXTENT_MERGE_SIZE], |
883 | int *endnum) | |
1da177e4 LT |
884 | { |
885 | int i; | |
4b11111a MS |
886 | unsigned long blocksize = inode->i_sb->s_blocksize; |
887 | unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; | |
1da177e4 | 888 | |
cb00ea35 | 889 | for (i = 0; i < (*endnum - 1); i++) { |
4b11111a MS |
890 | kernel_long_ad *li /*l[i]*/ = &laarr[i]; |
891 | kernel_long_ad *lip1 /*l[i plus 1]*/ = &laarr[i + 1]; | |
892 | ||
893 | if (((li->extLength >> 30) == (lip1->extLength >> 30)) && | |
894 | (((li->extLength >> 30) == | |
895 | (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) || | |
896 | ((lip1->extLocation.logicalBlockNum - | |
897 | li->extLocation.logicalBlockNum) == | |
898 | (((li->extLength & UDF_EXTENT_LENGTH_MASK) + | |
899 | blocksize - 1) >> blocksize_bits)))) { | |
900 | ||
901 | if (((li->extLength & UDF_EXTENT_LENGTH_MASK) + | |
902 | (lip1->extLength & UDF_EXTENT_LENGTH_MASK) + | |
903 | blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) { | |
904 | lip1->extLength = (lip1->extLength - | |
905 | (li->extLength & | |
906 | UDF_EXTENT_LENGTH_MASK) + | |
907 | UDF_EXTENT_LENGTH_MASK) & | |
908 | ~(blocksize - 1); | |
909 | li->extLength = (li->extLength & | |
910 | UDF_EXTENT_FLAG_MASK) + | |
911 | (UDF_EXTENT_LENGTH_MASK + 1) - | |
912 | blocksize; | |
913 | lip1->extLocation.logicalBlockNum = | |
914 | li->extLocation.logicalBlockNum + | |
915 | ((li->extLength & | |
916 | UDF_EXTENT_LENGTH_MASK) >> | |
917 | blocksize_bits); | |
918 | } else { | |
919 | li->extLength = lip1->extLength + | |
920 | (((li->extLength & | |
921 | UDF_EXTENT_LENGTH_MASK) + | |
922 | blocksize - 1) & ~(blocksize - 1)); | |
923 | if (*endnum > (i + 2)) | |
924 | memmove(&laarr[i + 1], &laarr[i + 2], | |
925 | sizeof(long_ad) * | |
926 | (*endnum - (i + 2))); | |
927 | i--; | |
928 | (*endnum)--; | |
1da177e4 | 929 | } |
4b11111a MS |
930 | } else if (((li->extLength >> 30) == |
931 | (EXT_NOT_RECORDED_ALLOCATED >> 30)) && | |
932 | ((lip1->extLength >> 30) == | |
933 | (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))) { | |
934 | udf_free_blocks(inode->i_sb, inode, li->extLocation, 0, | |
935 | ((li->extLength & | |
936 | UDF_EXTENT_LENGTH_MASK) + | |
937 | blocksize - 1) >> blocksize_bits); | |
938 | li->extLocation.logicalBlockNum = 0; | |
939 | li->extLocation.partitionReferenceNum = 0; | |
940 | ||
941 | if (((li->extLength & UDF_EXTENT_LENGTH_MASK) + | |
942 | (lip1->extLength & UDF_EXTENT_LENGTH_MASK) + | |
943 | blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) { | |
944 | lip1->extLength = (lip1->extLength - | |
945 | (li->extLength & | |
946 | UDF_EXTENT_LENGTH_MASK) + | |
947 | UDF_EXTENT_LENGTH_MASK) & | |
948 | ~(blocksize - 1); | |
949 | li->extLength = (li->extLength & | |
950 | UDF_EXTENT_FLAG_MASK) + | |
951 | (UDF_EXTENT_LENGTH_MASK + 1) - | |
952 | blocksize; | |
cb00ea35 | 953 | } else { |
4b11111a MS |
954 | li->extLength = lip1->extLength + |
955 | (((li->extLength & | |
956 | UDF_EXTENT_LENGTH_MASK) + | |
957 | blocksize - 1) & ~(blocksize - 1)); | |
cb00ea35 CG |
958 | if (*endnum > (i + 2)) |
959 | memmove(&laarr[i + 1], &laarr[i + 2], | |
4b11111a MS |
960 | sizeof(long_ad) * |
961 | (*endnum - (i + 2))); | |
cb00ea35 CG |
962 | i--; |
963 | (*endnum)--; | |
1da177e4 | 964 | } |
4b11111a MS |
965 | } else if ((li->extLength >> 30) == |
966 | (EXT_NOT_RECORDED_ALLOCATED >> 30)) { | |
967 | udf_free_blocks(inode->i_sb, inode, | |
968 | li->extLocation, 0, | |
969 | ((li->extLength & | |
970 | UDF_EXTENT_LENGTH_MASK) + | |
971 | blocksize - 1) >> blocksize_bits); | |
972 | li->extLocation.logicalBlockNum = 0; | |
973 | li->extLocation.partitionReferenceNum = 0; | |
974 | li->extLength = (li->extLength & | |
975 | UDF_EXTENT_LENGTH_MASK) | | |
976 | EXT_NOT_RECORDED_NOT_ALLOCATED; | |
1da177e4 LT |
977 | } |
978 | } | |
979 | } | |
980 | ||
981 | static void udf_update_extents(struct inode *inode, | |
cb00ea35 CG |
982 | kernel_long_ad laarr[EXTENT_MERGE_SIZE], |
983 | int startnum, int endnum, | |
984 | struct extent_position *epos) | |
1da177e4 LT |
985 | { |
986 | int start = 0, i; | |
987 | kernel_lb_addr tmploc; | |
988 | uint32_t tmplen; | |
989 | ||
cb00ea35 CG |
990 | if (startnum > endnum) { |
991 | for (i = 0; i < (startnum - endnum); i++) | |
ff116fc8 | 992 | udf_delete_aext(inode, *epos, laarr[i].extLocation, |
cb00ea35 CG |
993 | laarr[i].extLength); |
994 | } else if (startnum < endnum) { | |
995 | for (i = 0; i < (endnum - startnum); i++) { | |
ff116fc8 | 996 | udf_insert_aext(inode, *epos, laarr[i].extLocation, |
cb00ea35 | 997 | laarr[i].extLength); |
ff116fc8 | 998 | udf_next_aext(inode, epos, &laarr[i].extLocation, |
cb00ea35 CG |
999 | &laarr[i].extLength, 1); |
1000 | start++; | |
1da177e4 LT |
1001 | } |
1002 | } | |
1003 | ||
cb00ea35 | 1004 | for (i = start; i < endnum; i++) { |
ff116fc8 JK |
1005 | udf_next_aext(inode, epos, &tmploc, &tmplen, 0); |
1006 | udf_write_aext(inode, epos, laarr[i].extLocation, | |
cb00ea35 | 1007 | laarr[i].extLength, 1); |
1da177e4 LT |
1008 | } |
1009 | } | |
1010 | ||
cb00ea35 CG |
1011 | struct buffer_head *udf_bread(struct inode *inode, int block, |
1012 | int create, int *err) | |
1da177e4 | 1013 | { |
cb00ea35 | 1014 | struct buffer_head *bh = NULL; |
1da177e4 LT |
1015 | |
1016 | bh = udf_getblk(inode, block, create, err); | |
1017 | if (!bh) | |
1018 | return NULL; | |
1019 | ||
1020 | if (buffer_uptodate(bh)) | |
1021 | return bh; | |
28de7948 | 1022 | |
1da177e4 | 1023 | ll_rw_block(READ, 1, &bh); |
28de7948 | 1024 | |
1da177e4 LT |
1025 | wait_on_buffer(bh); |
1026 | if (buffer_uptodate(bh)) | |
1027 | return bh; | |
28de7948 | 1028 | |
1da177e4 LT |
1029 | brelse(bh); |
1030 | *err = -EIO; | |
1031 | return NULL; | |
1032 | } | |
1033 | ||
cb00ea35 | 1034 | void udf_truncate(struct inode *inode) |
1da177e4 LT |
1035 | { |
1036 | int offset; | |
1037 | int err; | |
48d6d8ff | 1038 | struct udf_inode_info *iinfo; |
1da177e4 LT |
1039 | |
1040 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || | |
cb00ea35 | 1041 | S_ISLNK(inode->i_mode))) |
1da177e4 LT |
1042 | return; |
1043 | if (IS_APPEND(inode) || IS_IMMUTABLE(inode)) | |
1044 | return; | |
1045 | ||
1046 | lock_kernel(); | |
48d6d8ff MS |
1047 | iinfo = UDF_I(inode); |
1048 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { | |
4b11111a MS |
1049 | if (inode->i_sb->s_blocksize < |
1050 | (udf_file_entry_alloc_offset(inode) + | |
1051 | inode->i_size)) { | |
1da177e4 | 1052 | udf_expand_file_adinicb(inode, inode->i_size, &err); |
48d6d8ff MS |
1053 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { |
1054 | inode->i_size = iinfo->i_lenAlloc; | |
1da177e4 LT |
1055 | unlock_kernel(); |
1056 | return; | |
4b11111a | 1057 | } else |
1da177e4 | 1058 | udf_truncate_extents(inode); |
cb00ea35 | 1059 | } else { |
1da177e4 | 1060 | offset = inode->i_size & (inode->i_sb->s_blocksize - 1); |
48d6d8ff | 1061 | memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr + offset, |
c0b34438 | 1062 | 0x00, inode->i_sb->s_blocksize - |
4b11111a | 1063 | offset - udf_file_entry_alloc_offset(inode)); |
48d6d8ff | 1064 | iinfo->i_lenAlloc = inode->i_size; |
1da177e4 | 1065 | } |
cb00ea35 | 1066 | } else { |
4b11111a MS |
1067 | block_truncate_page(inode->i_mapping, inode->i_size, |
1068 | udf_get_block); | |
1da177e4 | 1069 | udf_truncate_extents(inode); |
647bd61a | 1070 | } |
1da177e4 LT |
1071 | |
1072 | inode->i_mtime = inode->i_ctime = current_fs_time(inode->i_sb); | |
1073 | if (IS_SYNC(inode)) | |
cb00ea35 | 1074 | udf_sync_inode(inode); |
1da177e4 LT |
1075 | else |
1076 | mark_inode_dirty(inode); | |
1077 | unlock_kernel(); | |
1078 | } | |
1079 | ||
cb00ea35 | 1080 | static void __udf_read_inode(struct inode *inode) |
1da177e4 LT |
1081 | { |
1082 | struct buffer_head *bh = NULL; | |
1083 | struct fileEntry *fe; | |
1084 | uint16_t ident; | |
48d6d8ff | 1085 | struct udf_inode_info *iinfo = UDF_I(inode); |
1da177e4 LT |
1086 | |
1087 | /* | |
1088 | * Set defaults, but the inode is still incomplete! | |
1089 | * Note: get_new_inode() sets the following on a new inode: | |
1090 | * i_sb = sb | |
1091 | * i_no = ino | |
1092 | * i_flags = sb->s_flags | |
1093 | * i_state = 0 | |
1094 | * clean_inode(): zero fills and sets | |
1095 | * i_count = 1 | |
1096 | * i_nlink = 1 | |
1097 | * i_op = NULL; | |
1098 | */ | |
48d6d8ff | 1099 | bh = udf_read_ptagged(inode->i_sb, iinfo->i_location, 0, &ident); |
cb00ea35 | 1100 | if (!bh) { |
1da177e4 | 1101 | printk(KERN_ERR "udf: udf_read_inode(ino %ld) failed !bh\n", |
cb00ea35 | 1102 | inode->i_ino); |
1da177e4 LT |
1103 | make_bad_inode(inode); |
1104 | return; | |
1105 | } | |
1106 | ||
1107 | if (ident != TAG_IDENT_FE && ident != TAG_IDENT_EFE && | |
cb00ea35 | 1108 | ident != TAG_IDENT_USE) { |
4b11111a MS |
1109 | printk(KERN_ERR "udf: udf_read_inode(ino %ld) " |
1110 | "failed ident=%d\n", inode->i_ino, ident); | |
3bf25cb4 | 1111 | brelse(bh); |
1da177e4 LT |
1112 | make_bad_inode(inode); |
1113 | return; | |
1114 | } | |
1115 | ||
1116 | fe = (struct fileEntry *)bh->b_data; | |
1117 | ||
5e0f0017 | 1118 | if (fe->icbTag.strategyType == cpu_to_le16(4096)) { |
1da177e4 LT |
1119 | struct buffer_head *ibh = NULL, *nbh = NULL; |
1120 | struct indirectEntry *ie; | |
1121 | ||
48d6d8ff | 1122 | ibh = udf_read_ptagged(inode->i_sb, iinfo->i_location, 1, |
4b11111a | 1123 | &ident); |
cb00ea35 CG |
1124 | if (ident == TAG_IDENT_IE) { |
1125 | if (ibh) { | |
1da177e4 LT |
1126 | kernel_lb_addr loc; |
1127 | ie = (struct indirectEntry *)ibh->b_data; | |
647bd61a | 1128 | |
1da177e4 | 1129 | loc = lelb_to_cpu(ie->indirectICB.extLocation); |
647bd61a CG |
1130 | |
1131 | if (ie->indirectICB.extLength && | |
4b11111a MS |
1132 | (nbh = udf_read_ptagged(inode->i_sb, loc, 0, |
1133 | &ident))) { | |
28de7948 CG |
1134 | if (ident == TAG_IDENT_FE || |
1135 | ident == TAG_IDENT_EFE) { | |
48d6d8ff | 1136 | memcpy(&iinfo->i_location, |
4b11111a | 1137 | &loc, |
cb00ea35 | 1138 | sizeof(kernel_lb_addr)); |
3bf25cb4 JK |
1139 | brelse(bh); |
1140 | brelse(ibh); | |
1141 | brelse(nbh); | |
1da177e4 LT |
1142 | __udf_read_inode(inode); |
1143 | return; | |
cb00ea35 | 1144 | } else { |
3bf25cb4 JK |
1145 | brelse(nbh); |
1146 | brelse(ibh); | |
1da177e4 | 1147 | } |
28de7948 | 1148 | } else { |
3bf25cb4 | 1149 | brelse(ibh); |
28de7948 | 1150 | } |
1da177e4 | 1151 | } |
28de7948 | 1152 | } else { |
3bf25cb4 | 1153 | brelse(ibh); |
28de7948 | 1154 | } |
5e0f0017 | 1155 | } else if (fe->icbTag.strategyType != cpu_to_le16(4)) { |
1da177e4 | 1156 | printk(KERN_ERR "udf: unsupported strategy type: %d\n", |
cb00ea35 | 1157 | le16_to_cpu(fe->icbTag.strategyType)); |
3bf25cb4 | 1158 | brelse(bh); |
1da177e4 LT |
1159 | make_bad_inode(inode); |
1160 | return; | |
1161 | } | |
1162 | udf_fill_inode(inode, bh); | |
31170b6a | 1163 | |
3bf25cb4 | 1164 | brelse(bh); |
1da177e4 LT |
1165 | } |
1166 | ||
1167 | static void udf_fill_inode(struct inode *inode, struct buffer_head *bh) | |
1168 | { | |
1169 | struct fileEntry *fe; | |
1170 | struct extendedFileEntry *efe; | |
1171 | time_t convtime; | |
1172 | long convtime_usec; | |
1173 | int offset; | |
6c79e987 | 1174 | struct udf_sb_info *sbi = UDF_SB(inode->i_sb); |
48d6d8ff | 1175 | struct udf_inode_info *iinfo = UDF_I(inode); |
1da177e4 LT |
1176 | |
1177 | fe = (struct fileEntry *)bh->b_data; | |
1178 | efe = (struct extendedFileEntry *)bh->b_data; | |
1179 | ||
5e0f0017 | 1180 | if (fe->icbTag.strategyType == cpu_to_le16(4)) |
48d6d8ff | 1181 | iinfo->i_strat4096 = 0; |
5e0f0017 | 1182 | else /* if (fe->icbTag.strategyType == cpu_to_le16(4096)) */ |
48d6d8ff | 1183 | iinfo->i_strat4096 = 1; |
1da177e4 | 1184 | |
48d6d8ff | 1185 | iinfo->i_alloc_type = le16_to_cpu(fe->icbTag.flags) & |
4b11111a | 1186 | ICBTAG_FLAG_AD_MASK; |
48d6d8ff MS |
1187 | iinfo->i_unique = 0; |
1188 | iinfo->i_lenEAttr = 0; | |
1189 | iinfo->i_lenExtents = 0; | |
1190 | iinfo->i_lenAlloc = 0; | |
1191 | iinfo->i_next_alloc_block = 0; | |
1192 | iinfo->i_next_alloc_goal = 0; | |
5e0f0017 | 1193 | if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_EFE)) { |
48d6d8ff MS |
1194 | iinfo->i_efe = 1; |
1195 | iinfo->i_use = 0; | |
4b11111a MS |
1196 | if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize - |
1197 | sizeof(struct extendedFileEntry))) { | |
647bd61a CG |
1198 | make_bad_inode(inode); |
1199 | return; | |
1200 | } | |
48d6d8ff | 1201 | memcpy(iinfo->i_ext.i_data, |
4b11111a MS |
1202 | bh->b_data + sizeof(struct extendedFileEntry), |
1203 | inode->i_sb->s_blocksize - | |
1204 | sizeof(struct extendedFileEntry)); | |
5e0f0017 | 1205 | } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_FE)) { |
48d6d8ff MS |
1206 | iinfo->i_efe = 0; |
1207 | iinfo->i_use = 0; | |
4b11111a MS |
1208 | if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize - |
1209 | sizeof(struct fileEntry))) { | |
647bd61a CG |
1210 | make_bad_inode(inode); |
1211 | return; | |
1212 | } | |
48d6d8ff | 1213 | memcpy(iinfo->i_ext.i_data, |
c0b34438 | 1214 | bh->b_data + sizeof(struct fileEntry), |
cb00ea35 | 1215 | inode->i_sb->s_blocksize - sizeof(struct fileEntry)); |
5e0f0017 | 1216 | } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_USE)) { |
48d6d8ff MS |
1217 | iinfo->i_efe = 0; |
1218 | iinfo->i_use = 1; | |
1219 | iinfo->i_lenAlloc = le32_to_cpu( | |
4b11111a MS |
1220 | ((struct unallocSpaceEntry *)bh->b_data)-> |
1221 | lengthAllocDescs); | |
1222 | if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize - | |
1223 | sizeof(struct unallocSpaceEntry))) { | |
647bd61a CG |
1224 | make_bad_inode(inode); |
1225 | return; | |
1226 | } | |
48d6d8ff | 1227 | memcpy(iinfo->i_ext.i_data, |
4b11111a MS |
1228 | bh->b_data + sizeof(struct unallocSpaceEntry), |
1229 | inode->i_sb->s_blocksize - | |
1230 | sizeof(struct unallocSpaceEntry)); | |
1da177e4 LT |
1231 | return; |
1232 | } | |
1233 | ||
1234 | inode->i_uid = le32_to_cpu(fe->uid); | |
ca76d2d8 CG |
1235 | if (inode->i_uid == -1 || |
1236 | UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_IGNORE) || | |
1237 | UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_SET)) | |
4d6660eb | 1238 | inode->i_uid = UDF_SB(inode->i_sb)->s_uid; |
1da177e4 LT |
1239 | |
1240 | inode->i_gid = le32_to_cpu(fe->gid); | |
ca76d2d8 CG |
1241 | if (inode->i_gid == -1 || |
1242 | UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_IGNORE) || | |
1243 | UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_SET)) | |
4d6660eb | 1244 | inode->i_gid = UDF_SB(inode->i_sb)->s_gid; |
1da177e4 LT |
1245 | |
1246 | inode->i_nlink = le16_to_cpu(fe->fileLinkCount); | |
1247 | if (!inode->i_nlink) | |
1248 | inode->i_nlink = 1; | |
647bd61a | 1249 | |
1da177e4 | 1250 | inode->i_size = le64_to_cpu(fe->informationLength); |
48d6d8ff | 1251 | iinfo->i_lenExtents = inode->i_size; |
1da177e4 LT |
1252 | |
1253 | inode->i_mode = udf_convert_permissions(fe); | |
1254 | inode->i_mode &= ~UDF_SB(inode->i_sb)->s_umask; | |
1255 | ||
48d6d8ff | 1256 | if (iinfo->i_efe == 0) { |
1da177e4 | 1257 | inode->i_blocks = le64_to_cpu(fe->logicalBlocksRecorded) << |
28de7948 | 1258 | (inode->i_sb->s_blocksize_bits - 9); |
1da177e4 | 1259 | |
cb00ea35 CG |
1260 | if (udf_stamp_to_time(&convtime, &convtime_usec, |
1261 | lets_to_cpu(fe->accessTime))) { | |
1da177e4 LT |
1262 | inode->i_atime.tv_sec = convtime; |
1263 | inode->i_atime.tv_nsec = convtime_usec * 1000; | |
cb00ea35 | 1264 | } else { |
6c79e987 | 1265 | inode->i_atime = sbi->s_record_time; |
1da177e4 LT |
1266 | } |
1267 | ||
cb00ea35 CG |
1268 | if (udf_stamp_to_time(&convtime, &convtime_usec, |
1269 | lets_to_cpu(fe->modificationTime))) { | |
1da177e4 LT |
1270 | inode->i_mtime.tv_sec = convtime; |
1271 | inode->i_mtime.tv_nsec = convtime_usec * 1000; | |
cb00ea35 | 1272 | } else { |
6c79e987 | 1273 | inode->i_mtime = sbi->s_record_time; |
1da177e4 LT |
1274 | } |
1275 | ||
cb00ea35 CG |
1276 | if (udf_stamp_to_time(&convtime, &convtime_usec, |
1277 | lets_to_cpu(fe->attrTime))) { | |
1da177e4 LT |
1278 | inode->i_ctime.tv_sec = convtime; |
1279 | inode->i_ctime.tv_nsec = convtime_usec * 1000; | |
cb00ea35 | 1280 | } else { |
6c79e987 | 1281 | inode->i_ctime = sbi->s_record_time; |
1da177e4 LT |
1282 | } |
1283 | ||
48d6d8ff MS |
1284 | iinfo->i_unique = le64_to_cpu(fe->uniqueID); |
1285 | iinfo->i_lenEAttr = le32_to_cpu(fe->lengthExtendedAttr); | |
1286 | iinfo->i_lenAlloc = le32_to_cpu(fe->lengthAllocDescs); | |
1287 | offset = sizeof(struct fileEntry) + iinfo->i_lenEAttr; | |
cb00ea35 | 1288 | } else { |
647bd61a | 1289 | inode->i_blocks = le64_to_cpu(efe->logicalBlocksRecorded) << |
cb00ea35 | 1290 | (inode->i_sb->s_blocksize_bits - 9); |
1da177e4 | 1291 | |
cb00ea35 CG |
1292 | if (udf_stamp_to_time(&convtime, &convtime_usec, |
1293 | lets_to_cpu(efe->accessTime))) { | |
1da177e4 LT |
1294 | inode->i_atime.tv_sec = convtime; |
1295 | inode->i_atime.tv_nsec = convtime_usec * 1000; | |
cb00ea35 | 1296 | } else { |
6c79e987 | 1297 | inode->i_atime = sbi->s_record_time; |
1da177e4 LT |
1298 | } |
1299 | ||
cb00ea35 CG |
1300 | if (udf_stamp_to_time(&convtime, &convtime_usec, |
1301 | lets_to_cpu(efe->modificationTime))) { | |
1da177e4 LT |
1302 | inode->i_mtime.tv_sec = convtime; |
1303 | inode->i_mtime.tv_nsec = convtime_usec * 1000; | |
cb00ea35 | 1304 | } else { |
6c79e987 | 1305 | inode->i_mtime = sbi->s_record_time; |
1da177e4 LT |
1306 | } |
1307 | ||
cb00ea35 CG |
1308 | if (udf_stamp_to_time(&convtime, &convtime_usec, |
1309 | lets_to_cpu(efe->createTime))) { | |
48d6d8ff MS |
1310 | iinfo->i_crtime.tv_sec = convtime; |
1311 | iinfo->i_crtime.tv_nsec = convtime_usec * 1000; | |
cb00ea35 | 1312 | } else { |
48d6d8ff | 1313 | iinfo->i_crtime = sbi->s_record_time; |
1da177e4 LT |
1314 | } |
1315 | ||
cb00ea35 CG |
1316 | if (udf_stamp_to_time(&convtime, &convtime_usec, |
1317 | lets_to_cpu(efe->attrTime))) { | |
1da177e4 LT |
1318 | inode->i_ctime.tv_sec = convtime; |
1319 | inode->i_ctime.tv_nsec = convtime_usec * 1000; | |
cb00ea35 | 1320 | } else { |
6c79e987 | 1321 | inode->i_ctime = sbi->s_record_time; |
1da177e4 LT |
1322 | } |
1323 | ||
48d6d8ff MS |
1324 | iinfo->i_unique = le64_to_cpu(efe->uniqueID); |
1325 | iinfo->i_lenEAttr = le32_to_cpu(efe->lengthExtendedAttr); | |
1326 | iinfo->i_lenAlloc = le32_to_cpu(efe->lengthAllocDescs); | |
4b11111a | 1327 | offset = sizeof(struct extendedFileEntry) + |
48d6d8ff | 1328 | iinfo->i_lenEAttr; |
1da177e4 LT |
1329 | } |
1330 | ||
cb00ea35 CG |
1331 | switch (fe->icbTag.fileType) { |
1332 | case ICBTAG_FILE_TYPE_DIRECTORY: | |
28de7948 CG |
1333 | inode->i_op = &udf_dir_inode_operations; |
1334 | inode->i_fop = &udf_dir_operations; | |
1335 | inode->i_mode |= S_IFDIR; | |
1336 | inc_nlink(inode); | |
1337 | break; | |
cb00ea35 CG |
1338 | case ICBTAG_FILE_TYPE_REALTIME: |
1339 | case ICBTAG_FILE_TYPE_REGULAR: | |
1340 | case ICBTAG_FILE_TYPE_UNDEF: | |
48d6d8ff | 1341 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
28de7948 CG |
1342 | inode->i_data.a_ops = &udf_adinicb_aops; |
1343 | else | |
1344 | inode->i_data.a_ops = &udf_aops; | |
1345 | inode->i_op = &udf_file_inode_operations; | |
1346 | inode->i_fop = &udf_file_operations; | |
1347 | inode->i_mode |= S_IFREG; | |
1348 | break; | |
cb00ea35 | 1349 | case ICBTAG_FILE_TYPE_BLOCK: |
28de7948 CG |
1350 | inode->i_mode |= S_IFBLK; |
1351 | break; | |
cb00ea35 | 1352 | case ICBTAG_FILE_TYPE_CHAR: |
28de7948 CG |
1353 | inode->i_mode |= S_IFCHR; |
1354 | break; | |
cb00ea35 | 1355 | case ICBTAG_FILE_TYPE_FIFO: |
28de7948 CG |
1356 | init_special_inode(inode, inode->i_mode | S_IFIFO, 0); |
1357 | break; | |
cb00ea35 | 1358 | case ICBTAG_FILE_TYPE_SOCKET: |
28de7948 CG |
1359 | init_special_inode(inode, inode->i_mode | S_IFSOCK, 0); |
1360 | break; | |
cb00ea35 | 1361 | case ICBTAG_FILE_TYPE_SYMLINK: |
28de7948 CG |
1362 | inode->i_data.a_ops = &udf_symlink_aops; |
1363 | inode->i_op = &page_symlink_inode_operations; | |
1364 | inode->i_mode = S_IFLNK | S_IRWXUGO; | |
1365 | break; | |
cb00ea35 | 1366 | default: |
4b11111a MS |
1367 | printk(KERN_ERR "udf: udf_fill_inode(ino %ld) failed unknown " |
1368 | "file type=%d\n", inode->i_ino, | |
1369 | fe->icbTag.fileType); | |
28de7948 CG |
1370 | make_bad_inode(inode); |
1371 | return; | |
1da177e4 | 1372 | } |
cb00ea35 | 1373 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { |
4b11111a MS |
1374 | struct deviceSpec *dsea = |
1375 | (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1); | |
cb00ea35 CG |
1376 | if (dsea) { |
1377 | init_special_inode(inode, inode->i_mode, | |
4b11111a MS |
1378 | MKDEV(le32_to_cpu(dsea->majorDeviceIdent), |
1379 | le32_to_cpu(dsea->minorDeviceIdent))); | |
1da177e4 | 1380 | /* Developer ID ??? */ |
4b11111a | 1381 | } else |
1da177e4 | 1382 | make_bad_inode(inode); |
1da177e4 LT |
1383 | } |
1384 | } | |
1385 | ||
647bd61a CG |
1386 | static int udf_alloc_i_data(struct inode *inode, size_t size) |
1387 | { | |
48d6d8ff MS |
1388 | struct udf_inode_info *iinfo = UDF_I(inode); |
1389 | iinfo->i_ext.i_data = kmalloc(size, GFP_KERNEL); | |
647bd61a | 1390 | |
48d6d8ff | 1391 | if (!iinfo->i_ext.i_data) { |
4b11111a MS |
1392 | printk(KERN_ERR "udf:udf_alloc_i_data (ino %ld) " |
1393 | "no free memory\n", inode->i_ino); | |
647bd61a CG |
1394 | return -ENOMEM; |
1395 | } | |
1396 | ||
1397 | return 0; | |
1398 | } | |
1399 | ||
cb00ea35 | 1400 | static mode_t udf_convert_permissions(struct fileEntry *fe) |
1da177e4 LT |
1401 | { |
1402 | mode_t mode; | |
1403 | uint32_t permissions; | |
1404 | uint32_t flags; | |
1405 | ||
1406 | permissions = le32_to_cpu(fe->permissions); | |
1407 | flags = le16_to_cpu(fe->icbTag.flags); | |
1408 | ||
4b11111a MS |
1409 | mode = ((permissions) & S_IRWXO) | |
1410 | ((permissions >> 2) & S_IRWXG) | | |
1411 | ((permissions >> 4) & S_IRWXU) | | |
1412 | ((flags & ICBTAG_FLAG_SETUID) ? S_ISUID : 0) | | |
1413 | ((flags & ICBTAG_FLAG_SETGID) ? S_ISGID : 0) | | |
1414 | ((flags & ICBTAG_FLAG_STICKY) ? S_ISVTX : 0); | |
1da177e4 LT |
1415 | |
1416 | return mode; | |
1417 | } | |
1418 | ||
1419 | /* | |
1420 | * udf_write_inode | |
1421 | * | |
1422 | * PURPOSE | |
1423 | * Write out the specified inode. | |
1424 | * | |
1425 | * DESCRIPTION | |
1426 | * This routine is called whenever an inode is synced. | |
1427 | * Currently this routine is just a placeholder. | |
1428 | * | |
1429 | * HISTORY | |
1430 | * July 1, 1997 - Andrew E. Mileski | |
1431 | * Written, tested, and released. | |
1432 | */ | |
1433 | ||
cb00ea35 | 1434 | int udf_write_inode(struct inode *inode, int sync) |
1da177e4 LT |
1435 | { |
1436 | int ret; | |
28de7948 | 1437 | |
1da177e4 LT |
1438 | lock_kernel(); |
1439 | ret = udf_update_inode(inode, sync); | |
1440 | unlock_kernel(); | |
28de7948 | 1441 | |
1da177e4 LT |
1442 | return ret; |
1443 | } | |
1444 | ||
cb00ea35 | 1445 | int udf_sync_inode(struct inode *inode) |
1da177e4 LT |
1446 | { |
1447 | return udf_update_inode(inode, 1); | |
1448 | } | |
1449 | ||
cb00ea35 | 1450 | static int udf_update_inode(struct inode *inode, int do_sync) |
1da177e4 LT |
1451 | { |
1452 | struct buffer_head *bh = NULL; | |
1453 | struct fileEntry *fe; | |
1454 | struct extendedFileEntry *efe; | |
1455 | uint32_t udfperms; | |
1456 | uint16_t icbflags; | |
1457 | uint16_t crclen; | |
1da177e4 LT |
1458 | kernel_timestamp cpu_time; |
1459 | int err = 0; | |
6c79e987 | 1460 | struct udf_sb_info *sbi = UDF_SB(inode->i_sb); |
4b11111a | 1461 | unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; |
48d6d8ff | 1462 | struct udf_inode_info *iinfo = UDF_I(inode); |
1da177e4 | 1463 | |
4b11111a MS |
1464 | bh = udf_tread(inode->i_sb, |
1465 | udf_get_lb_pblock(inode->i_sb, | |
48d6d8ff | 1466 | iinfo->i_location, 0)); |
cb00ea35 | 1467 | if (!bh) { |
1da177e4 LT |
1468 | udf_debug("bread failure\n"); |
1469 | return -EIO; | |
1470 | } | |
1471 | ||
1472 | memset(bh->b_data, 0x00, inode->i_sb->s_blocksize); | |
1473 | ||
1474 | fe = (struct fileEntry *)bh->b_data; | |
1475 | efe = (struct extendedFileEntry *)bh->b_data; | |
1476 | ||
5e0f0017 | 1477 | if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_USE)) { |
1da177e4 | 1478 | struct unallocSpaceEntry *use = |
28de7948 | 1479 | (struct unallocSpaceEntry *)bh->b_data; |
1da177e4 | 1480 | |
48d6d8ff | 1481 | use->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc); |
4b11111a | 1482 | memcpy(bh->b_data + sizeof(struct unallocSpaceEntry), |
48d6d8ff | 1483 | iinfo->i_ext.i_data, inode->i_sb->s_blocksize - |
4b11111a MS |
1484 | sizeof(struct unallocSpaceEntry)); |
1485 | crclen = sizeof(struct unallocSpaceEntry) + | |
48d6d8ff | 1486 | iinfo->i_lenAlloc - sizeof(tag); |
4b11111a | 1487 | use->descTag.tagLocation = cpu_to_le32( |
48d6d8ff | 1488 | iinfo->i_location. |
4b11111a | 1489 | logicalBlockNum); |
1da177e4 | 1490 | use->descTag.descCRCLength = cpu_to_le16(crclen); |
4b11111a MS |
1491 | use->descTag.descCRC = cpu_to_le16(udf_crc((char *)use + |
1492 | sizeof(tag), crclen, | |
1493 | 0)); | |
3f2587bb | 1494 | use->descTag.tagChecksum = udf_tag_checksum(&use->descTag); |
1da177e4 LT |
1495 | |
1496 | mark_buffer_dirty(bh); | |
3bf25cb4 | 1497 | brelse(bh); |
1da177e4 LT |
1498 | return err; |
1499 | } | |
1500 | ||
4d6660eb PS |
1501 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_FORGET)) |
1502 | fe->uid = cpu_to_le32(-1); | |
cb00ea35 CG |
1503 | else |
1504 | fe->uid = cpu_to_le32(inode->i_uid); | |
1da177e4 | 1505 | |
4d6660eb PS |
1506 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_FORGET)) |
1507 | fe->gid = cpu_to_le32(-1); | |
cb00ea35 CG |
1508 | else |
1509 | fe->gid = cpu_to_le32(inode->i_gid); | |
1da177e4 | 1510 | |
4b11111a MS |
1511 | udfperms = ((inode->i_mode & S_IRWXO)) | |
1512 | ((inode->i_mode & S_IRWXG) << 2) | | |
1513 | ((inode->i_mode & S_IRWXU) << 4); | |
1da177e4 | 1514 | |
4b11111a MS |
1515 | udfperms |= (le32_to_cpu(fe->permissions) & |
1516 | (FE_PERM_O_DELETE | FE_PERM_O_CHATTR | | |
1517 | FE_PERM_G_DELETE | FE_PERM_G_CHATTR | | |
1518 | FE_PERM_U_DELETE | FE_PERM_U_CHATTR)); | |
1da177e4 LT |
1519 | fe->permissions = cpu_to_le32(udfperms); |
1520 | ||
1521 | if (S_ISDIR(inode->i_mode)) | |
1522 | fe->fileLinkCount = cpu_to_le16(inode->i_nlink - 1); | |
1523 | else | |
1524 | fe->fileLinkCount = cpu_to_le16(inode->i_nlink); | |
1525 | ||
1526 | fe->informationLength = cpu_to_le64(inode->i_size); | |
1527 | ||
cb00ea35 | 1528 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { |
1da177e4 | 1529 | regid *eid; |
28de7948 CG |
1530 | struct deviceSpec *dsea = |
1531 | (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1); | |
cb00ea35 | 1532 | if (!dsea) { |
1da177e4 | 1533 | dsea = (struct deviceSpec *) |
28de7948 CG |
1534 | udf_add_extendedattr(inode, |
1535 | sizeof(struct deviceSpec) + | |
1536 | sizeof(regid), 12, 0x3); | |
1da177e4 LT |
1537 | dsea->attrType = cpu_to_le32(12); |
1538 | dsea->attrSubtype = 1; | |
4b11111a MS |
1539 | dsea->attrLength = cpu_to_le32( |
1540 | sizeof(struct deviceSpec) + | |
1541 | sizeof(regid)); | |
1da177e4 LT |
1542 | dsea->impUseLength = cpu_to_le32(sizeof(regid)); |
1543 | } | |
28de7948 | 1544 | eid = (regid *)dsea->impUse; |
1da177e4 LT |
1545 | memset(eid, 0, sizeof(regid)); |
1546 | strcpy(eid->ident, UDF_ID_DEVELOPER); | |
1547 | eid->identSuffix[0] = UDF_OS_CLASS_UNIX; | |
1548 | eid->identSuffix[1] = UDF_OS_ID_LINUX; | |
1549 | dsea->majorDeviceIdent = cpu_to_le32(imajor(inode)); | |
1550 | dsea->minorDeviceIdent = cpu_to_le32(iminor(inode)); | |
1551 | } | |
1552 | ||
48d6d8ff | 1553 | if (iinfo->i_efe == 0) { |
c0b34438 | 1554 | memcpy(bh->b_data + sizeof(struct fileEntry), |
48d6d8ff | 1555 | iinfo->i_ext.i_data, |
cb00ea35 | 1556 | inode->i_sb->s_blocksize - sizeof(struct fileEntry)); |
28de7948 | 1557 | fe->logicalBlocksRecorded = cpu_to_le64( |
4b11111a MS |
1558 | (inode->i_blocks + (1 << (blocksize_bits - 9)) - 1) >> |
1559 | (blocksize_bits - 9)); | |
1da177e4 LT |
1560 | |
1561 | if (udf_time_to_stamp(&cpu_time, inode->i_atime)) | |
1562 | fe->accessTime = cpu_to_lets(cpu_time); | |
1563 | if (udf_time_to_stamp(&cpu_time, inode->i_mtime)) | |
1564 | fe->modificationTime = cpu_to_lets(cpu_time); | |
1565 | if (udf_time_to_stamp(&cpu_time, inode->i_ctime)) | |
1566 | fe->attrTime = cpu_to_lets(cpu_time); | |
1567 | memset(&(fe->impIdent), 0, sizeof(regid)); | |
1568 | strcpy(fe->impIdent.ident, UDF_ID_DEVELOPER); | |
1569 | fe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; | |
1570 | fe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; | |
48d6d8ff MS |
1571 | fe->uniqueID = cpu_to_le64(iinfo->i_unique); |
1572 | fe->lengthExtendedAttr = cpu_to_le32(iinfo->i_lenEAttr); | |
1573 | fe->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc); | |
1da177e4 LT |
1574 | fe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_FE); |
1575 | crclen = sizeof(struct fileEntry); | |
cb00ea35 | 1576 | } else { |
4b11111a | 1577 | memcpy(bh->b_data + sizeof(struct extendedFileEntry), |
48d6d8ff | 1578 | iinfo->i_ext.i_data, |
4b11111a MS |
1579 | inode->i_sb->s_blocksize - |
1580 | sizeof(struct extendedFileEntry)); | |
1da177e4 | 1581 | efe->objectSize = cpu_to_le64(inode->i_size); |
28de7948 | 1582 | efe->logicalBlocksRecorded = cpu_to_le64( |
4b11111a MS |
1583 | (inode->i_blocks + (1 << (blocksize_bits - 9)) - 1) >> |
1584 | (blocksize_bits - 9)); | |
1da177e4 | 1585 | |
48d6d8ff MS |
1586 | if (iinfo->i_crtime.tv_sec > inode->i_atime.tv_sec || |
1587 | (iinfo->i_crtime.tv_sec == inode->i_atime.tv_sec && | |
1588 | iinfo->i_crtime.tv_nsec > inode->i_atime.tv_nsec)) | |
1589 | iinfo->i_crtime = inode->i_atime; | |
4b11111a | 1590 | |
48d6d8ff MS |
1591 | if (iinfo->i_crtime.tv_sec > inode->i_mtime.tv_sec || |
1592 | (iinfo->i_crtime.tv_sec == inode->i_mtime.tv_sec && | |
1593 | iinfo->i_crtime.tv_nsec > inode->i_mtime.tv_nsec)) | |
1594 | iinfo->i_crtime = inode->i_mtime; | |
4b11111a | 1595 | |
48d6d8ff MS |
1596 | if (iinfo->i_crtime.tv_sec > inode->i_ctime.tv_sec || |
1597 | (iinfo->i_crtime.tv_sec == inode->i_ctime.tv_sec && | |
1598 | iinfo->i_crtime.tv_nsec > inode->i_ctime.tv_nsec)) | |
1599 | iinfo->i_crtime = inode->i_ctime; | |
1da177e4 LT |
1600 | |
1601 | if (udf_time_to_stamp(&cpu_time, inode->i_atime)) | |
1602 | efe->accessTime = cpu_to_lets(cpu_time); | |
1603 | if (udf_time_to_stamp(&cpu_time, inode->i_mtime)) | |
1604 | efe->modificationTime = cpu_to_lets(cpu_time); | |
48d6d8ff | 1605 | if (udf_time_to_stamp(&cpu_time, iinfo->i_crtime)) |
1da177e4 LT |
1606 | efe->createTime = cpu_to_lets(cpu_time); |
1607 | if (udf_time_to_stamp(&cpu_time, inode->i_ctime)) | |
1608 | efe->attrTime = cpu_to_lets(cpu_time); | |
1609 | ||
1610 | memset(&(efe->impIdent), 0, sizeof(regid)); | |
1611 | strcpy(efe->impIdent.ident, UDF_ID_DEVELOPER); | |
1612 | efe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; | |
1613 | efe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; | |
48d6d8ff MS |
1614 | efe->uniqueID = cpu_to_le64(iinfo->i_unique); |
1615 | efe->lengthExtendedAttr = cpu_to_le32(iinfo->i_lenEAttr); | |
1616 | efe->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc); | |
1da177e4 LT |
1617 | efe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_EFE); |
1618 | crclen = sizeof(struct extendedFileEntry); | |
1619 | } | |
48d6d8ff | 1620 | if (iinfo->i_strat4096) { |
1da177e4 LT |
1621 | fe->icbTag.strategyType = cpu_to_le16(4096); |
1622 | fe->icbTag.strategyParameter = cpu_to_le16(1); | |
1623 | fe->icbTag.numEntries = cpu_to_le16(2); | |
cb00ea35 | 1624 | } else { |
1da177e4 LT |
1625 | fe->icbTag.strategyType = cpu_to_le16(4); |
1626 | fe->icbTag.numEntries = cpu_to_le16(1); | |
1627 | } | |
1628 | ||
1629 | if (S_ISDIR(inode->i_mode)) | |
1630 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_DIRECTORY; | |
1631 | else if (S_ISREG(inode->i_mode)) | |
1632 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_REGULAR; | |
1633 | else if (S_ISLNK(inode->i_mode)) | |
1634 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_SYMLINK; | |
1635 | else if (S_ISBLK(inode->i_mode)) | |
1636 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_BLOCK; | |
1637 | else if (S_ISCHR(inode->i_mode)) | |
1638 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_CHAR; | |
1639 | else if (S_ISFIFO(inode->i_mode)) | |
1640 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_FIFO; | |
1641 | else if (S_ISSOCK(inode->i_mode)) | |
1642 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_SOCKET; | |
1643 | ||
48d6d8ff | 1644 | icbflags = iinfo->i_alloc_type | |
28de7948 CG |
1645 | ((inode->i_mode & S_ISUID) ? ICBTAG_FLAG_SETUID : 0) | |
1646 | ((inode->i_mode & S_ISGID) ? ICBTAG_FLAG_SETGID : 0) | | |
1647 | ((inode->i_mode & S_ISVTX) ? ICBTAG_FLAG_STICKY : 0) | | |
1648 | (le16_to_cpu(fe->icbTag.flags) & | |
1649 | ~(ICBTAG_FLAG_AD_MASK | ICBTAG_FLAG_SETUID | | |
1650 | ICBTAG_FLAG_SETGID | ICBTAG_FLAG_STICKY)); | |
1da177e4 LT |
1651 | |
1652 | fe->icbTag.flags = cpu_to_le16(icbflags); | |
6c79e987 | 1653 | if (sbi->s_udfrev >= 0x0200) |
1da177e4 LT |
1654 | fe->descTag.descVersion = cpu_to_le16(3); |
1655 | else | |
1656 | fe->descTag.descVersion = cpu_to_le16(2); | |
6c79e987 | 1657 | fe->descTag.tagSerialNum = cpu_to_le16(sbi->s_serial_number); |
4b11111a | 1658 | fe->descTag.tagLocation = cpu_to_le32( |
48d6d8ff MS |
1659 | iinfo->i_location.logicalBlockNum); |
1660 | crclen += iinfo->i_lenEAttr + iinfo->i_lenAlloc - | |
c0b34438 | 1661 | sizeof(tag); |
1da177e4 | 1662 | fe->descTag.descCRCLength = cpu_to_le16(crclen); |
4b11111a MS |
1663 | fe->descTag.descCRC = cpu_to_le16(udf_crc((char *)fe + sizeof(tag), |
1664 | crclen, 0)); | |
3f2587bb | 1665 | fe->descTag.tagChecksum = udf_tag_checksum(&fe->descTag); |
1da177e4 LT |
1666 | |
1667 | /* write the data blocks */ | |
1668 | mark_buffer_dirty(bh); | |
cb00ea35 | 1669 | if (do_sync) { |
1da177e4 | 1670 | sync_dirty_buffer(bh); |
cb00ea35 | 1671 | if (buffer_req(bh) && !buffer_uptodate(bh)) { |
4b11111a MS |
1672 | printk(KERN_WARNING "IO error syncing udf inode " |
1673 | "[%s:%08lx]\n", inode->i_sb->s_id, | |
1674 | inode->i_ino); | |
1da177e4 LT |
1675 | err = -EIO; |
1676 | } | |
1677 | } | |
3bf25cb4 | 1678 | brelse(bh); |
28de7948 | 1679 | |
1da177e4 LT |
1680 | return err; |
1681 | } | |
1682 | ||
cb00ea35 | 1683 | struct inode *udf_iget(struct super_block *sb, kernel_lb_addr ino) |
1da177e4 LT |
1684 | { |
1685 | unsigned long block = udf_get_lb_pblock(sb, ino, 0); | |
1686 | struct inode *inode = iget_locked(sb, block); | |
1687 | ||
1688 | if (!inode) | |
1689 | return NULL; | |
1690 | ||
1691 | if (inode->i_state & I_NEW) { | |
c0b34438 | 1692 | memcpy(&UDF_I(inode)->i_location, &ino, sizeof(kernel_lb_addr)); |
1da177e4 LT |
1693 | __udf_read_inode(inode); |
1694 | unlock_new_inode(inode); | |
1695 | } | |
1696 | ||
1697 | if (is_bad_inode(inode)) | |
1698 | goto out_iput; | |
1699 | ||
4b11111a MS |
1700 | if (ino.logicalBlockNum >= UDF_SB(sb)-> |
1701 | s_partmaps[ino.partitionReferenceNum].s_partition_len) { | |
1da177e4 | 1702 | udf_debug("block=%d, partition=%d out of range\n", |
cb00ea35 | 1703 | ino.logicalBlockNum, ino.partitionReferenceNum); |
1da177e4 LT |
1704 | make_bad_inode(inode); |
1705 | goto out_iput; | |
1706 | } | |
1707 | ||
1708 | return inode; | |
1709 | ||
28de7948 | 1710 | out_iput: |
1da177e4 LT |
1711 | iput(inode); |
1712 | return NULL; | |
1713 | } | |
1714 | ||
4b11111a | 1715 | int8_t udf_add_aext(struct inode *inode, struct extent_position *epos, |
cb00ea35 | 1716 | kernel_lb_addr eloc, uint32_t elen, int inc) |
1da177e4 LT |
1717 | { |
1718 | int adsize; | |
1719 | short_ad *sad = NULL; | |
1720 | long_ad *lad = NULL; | |
1721 | struct allocExtDesc *aed; | |
1722 | int8_t etype; | |
1723 | uint8_t *ptr; | |
48d6d8ff | 1724 | struct udf_inode_info *iinfo = UDF_I(inode); |
1da177e4 | 1725 | |
ff116fc8 | 1726 | if (!epos->bh) |
48d6d8ff | 1727 | ptr = iinfo->i_ext.i_data + epos->offset - |
4b11111a | 1728 | udf_file_entry_alloc_offset(inode) + |
48d6d8ff | 1729 | iinfo->i_lenEAttr; |
1da177e4 | 1730 | else |
ff116fc8 | 1731 | ptr = epos->bh->b_data + epos->offset; |
1da177e4 | 1732 | |
48d6d8ff | 1733 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
1da177e4 | 1734 | adsize = sizeof(short_ad); |
48d6d8ff | 1735 | else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
1da177e4 LT |
1736 | adsize = sizeof(long_ad); |
1737 | else | |
1738 | return -1; | |
1739 | ||
cb00ea35 | 1740 | if (epos->offset + (2 * adsize) > inode->i_sb->s_blocksize) { |
1da177e4 LT |
1741 | char *sptr, *dptr; |
1742 | struct buffer_head *nbh; | |
1743 | int err, loffset; | |
ff116fc8 | 1744 | kernel_lb_addr obloc = epos->block; |
1da177e4 | 1745 | |
4b11111a MS |
1746 | epos->block.logicalBlockNum = udf_new_block(inode->i_sb, NULL, |
1747 | obloc.partitionReferenceNum, | |
1748 | obloc.logicalBlockNum, &err); | |
1749 | if (!epos->block.logicalBlockNum) | |
1da177e4 | 1750 | return -1; |
4b11111a MS |
1751 | nbh = udf_tgetblk(inode->i_sb, udf_get_lb_pblock(inode->i_sb, |
1752 | epos->block, | |
1753 | 0)); | |
1754 | if (!nbh) | |
1da177e4 | 1755 | return -1; |
1da177e4 LT |
1756 | lock_buffer(nbh); |
1757 | memset(nbh->b_data, 0x00, inode->i_sb->s_blocksize); | |
1758 | set_buffer_uptodate(nbh); | |
1759 | unlock_buffer(nbh); | |
1760 | mark_buffer_dirty_inode(nbh, inode); | |
1761 | ||
1762 | aed = (struct allocExtDesc *)(nbh->b_data); | |
1763 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT)) | |
4b11111a MS |
1764 | aed->previousAllocExtLocation = |
1765 | cpu_to_le32(obloc.logicalBlockNum); | |
cb00ea35 | 1766 | if (epos->offset + adsize > inode->i_sb->s_blocksize) { |
ff116fc8 | 1767 | loffset = epos->offset; |
1da177e4 LT |
1768 | aed->lengthAllocDescs = cpu_to_le32(adsize); |
1769 | sptr = ptr - adsize; | |
1770 | dptr = nbh->b_data + sizeof(struct allocExtDesc); | |
1771 | memcpy(dptr, sptr, adsize); | |
ff116fc8 | 1772 | epos->offset = sizeof(struct allocExtDesc) + adsize; |
cb00ea35 | 1773 | } else { |
ff116fc8 | 1774 | loffset = epos->offset + adsize; |
1da177e4 LT |
1775 | aed->lengthAllocDescs = cpu_to_le32(0); |
1776 | sptr = ptr; | |
ff116fc8 | 1777 | epos->offset = sizeof(struct allocExtDesc); |
1da177e4 | 1778 | |
cb00ea35 | 1779 | if (epos->bh) { |
ff116fc8 | 1780 | aed = (struct allocExtDesc *)epos->bh->b_data; |
1da177e4 | 1781 | aed->lengthAllocDescs = |
4b11111a MS |
1782 | cpu_to_le32(le32_to_cpu( |
1783 | aed->lengthAllocDescs) + adsize); | |
cb00ea35 | 1784 | } else { |
48d6d8ff | 1785 | iinfo->i_lenAlloc += adsize; |
1da177e4 LT |
1786 | mark_inode_dirty(inode); |
1787 | } | |
1788 | } | |
6c79e987 | 1789 | if (UDF_SB(inode->i_sb)->s_udfrev >= 0x0200) |
1da177e4 | 1790 | udf_new_tag(nbh->b_data, TAG_IDENT_AED, 3, 1, |
cb00ea35 | 1791 | epos->block.logicalBlockNum, sizeof(tag)); |
1da177e4 LT |
1792 | else |
1793 | udf_new_tag(nbh->b_data, TAG_IDENT_AED, 2, 1, | |
cb00ea35 | 1794 | epos->block.logicalBlockNum, sizeof(tag)); |
48d6d8ff | 1795 | switch (iinfo->i_alloc_type) { |
cb00ea35 | 1796 | case ICBTAG_FLAG_AD_SHORT: |
28de7948 CG |
1797 | sad = (short_ad *)sptr; |
1798 | sad->extLength = cpu_to_le32(EXT_NEXT_EXTENT_ALLOCDECS | | |
1799 | inode->i_sb->s_blocksize); | |
4b11111a MS |
1800 | sad->extPosition = |
1801 | cpu_to_le32(epos->block.logicalBlockNum); | |
28de7948 | 1802 | break; |
cb00ea35 | 1803 | case ICBTAG_FLAG_AD_LONG: |
28de7948 CG |
1804 | lad = (long_ad *)sptr; |
1805 | lad->extLength = cpu_to_le32(EXT_NEXT_EXTENT_ALLOCDECS | | |
1806 | inode->i_sb->s_blocksize); | |
1807 | lad->extLocation = cpu_to_lelb(epos->block); | |
1808 | memset(lad->impUse, 0x00, sizeof(lad->impUse)); | |
1809 | break; | |
1da177e4 | 1810 | } |
cb00ea35 | 1811 | if (epos->bh) { |
28de7948 | 1812 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
6c79e987 | 1813 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) |
ff116fc8 | 1814 | udf_update_tag(epos->bh->b_data, loffset); |
1da177e4 | 1815 | else |
4b11111a MS |
1816 | udf_update_tag(epos->bh->b_data, |
1817 | sizeof(struct allocExtDesc)); | |
ff116fc8 | 1818 | mark_buffer_dirty_inode(epos->bh, inode); |
3bf25cb4 | 1819 | brelse(epos->bh); |
28de7948 | 1820 | } else { |
1da177e4 | 1821 | mark_inode_dirty(inode); |
28de7948 | 1822 | } |
ff116fc8 | 1823 | epos->bh = nbh; |
1da177e4 LT |
1824 | } |
1825 | ||
ff116fc8 | 1826 | etype = udf_write_aext(inode, epos, eloc, elen, inc); |
1da177e4 | 1827 | |
cb00ea35 | 1828 | if (!epos->bh) { |
48d6d8ff | 1829 | iinfo->i_lenAlloc += adsize; |
1da177e4 | 1830 | mark_inode_dirty(inode); |
cb00ea35 | 1831 | } else { |
ff116fc8 | 1832 | aed = (struct allocExtDesc *)epos->bh->b_data; |
1da177e4 | 1833 | aed->lengthAllocDescs = |
4b11111a MS |
1834 | cpu_to_le32(le32_to_cpu(aed->lengthAllocDescs) + |
1835 | adsize); | |
1836 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || | |
1837 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) | |
1838 | udf_update_tag(epos->bh->b_data, | |
1839 | epos->offset + (inc ? 0 : adsize)); | |
1da177e4 | 1840 | else |
4b11111a MS |
1841 | udf_update_tag(epos->bh->b_data, |
1842 | sizeof(struct allocExtDesc)); | |
ff116fc8 | 1843 | mark_buffer_dirty_inode(epos->bh, inode); |
1da177e4 LT |
1844 | } |
1845 | ||
1846 | return etype; | |
1847 | } | |
1848 | ||
4b11111a | 1849 | int8_t udf_write_aext(struct inode *inode, struct extent_position *epos, |
cb00ea35 | 1850 | kernel_lb_addr eloc, uint32_t elen, int inc) |
1da177e4 LT |
1851 | { |
1852 | int adsize; | |
1853 | uint8_t *ptr; | |
28de7948 CG |
1854 | short_ad *sad; |
1855 | long_ad *lad; | |
48d6d8ff | 1856 | struct udf_inode_info *iinfo = UDF_I(inode); |
1da177e4 | 1857 | |
ff116fc8 | 1858 | if (!epos->bh) |
48d6d8ff | 1859 | ptr = iinfo->i_ext.i_data + epos->offset - |
4b11111a | 1860 | udf_file_entry_alloc_offset(inode) + |
48d6d8ff | 1861 | iinfo->i_lenEAttr; |
1da177e4 | 1862 | else |
ff116fc8 | 1863 | ptr = epos->bh->b_data + epos->offset; |
1da177e4 | 1864 | |
48d6d8ff | 1865 | switch (iinfo->i_alloc_type) { |
cb00ea35 | 1866 | case ICBTAG_FLAG_AD_SHORT: |
28de7948 CG |
1867 | sad = (short_ad *)ptr; |
1868 | sad->extLength = cpu_to_le32(elen); | |
1869 | sad->extPosition = cpu_to_le32(eloc.logicalBlockNum); | |
1870 | adsize = sizeof(short_ad); | |
1871 | break; | |
cb00ea35 | 1872 | case ICBTAG_FLAG_AD_LONG: |
28de7948 CG |
1873 | lad = (long_ad *)ptr; |
1874 | lad->extLength = cpu_to_le32(elen); | |
1875 | lad->extLocation = cpu_to_lelb(eloc); | |
1876 | memset(lad->impUse, 0x00, sizeof(lad->impUse)); | |
1877 | adsize = sizeof(long_ad); | |
1878 | break; | |
cb00ea35 CG |
1879 | default: |
1880 | return -1; | |
1da177e4 LT |
1881 | } |
1882 | ||
cb00ea35 | 1883 | if (epos->bh) { |
28de7948 | 1884 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
6c79e987 | 1885 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) { |
4b11111a MS |
1886 | struct allocExtDesc *aed = |
1887 | (struct allocExtDesc *)epos->bh->b_data; | |
ff116fc8 | 1888 | udf_update_tag(epos->bh->b_data, |
4b11111a MS |
1889 | le32_to_cpu(aed->lengthAllocDescs) + |
1890 | sizeof(struct allocExtDesc)); | |
1da177e4 | 1891 | } |
ff116fc8 | 1892 | mark_buffer_dirty_inode(epos->bh, inode); |
28de7948 | 1893 | } else { |
1da177e4 | 1894 | mark_inode_dirty(inode); |
28de7948 | 1895 | } |
1da177e4 LT |
1896 | |
1897 | if (inc) | |
ff116fc8 | 1898 | epos->offset += adsize; |
28de7948 | 1899 | |
1da177e4 LT |
1900 | return (elen >> 30); |
1901 | } | |
1902 | ||
4b11111a MS |
1903 | int8_t udf_next_aext(struct inode *inode, struct extent_position *epos, |
1904 | kernel_lb_addr *eloc, uint32_t *elen, int inc) | |
1da177e4 LT |
1905 | { |
1906 | int8_t etype; | |
1907 | ||
ff116fc8 | 1908 | while ((etype = udf_current_aext(inode, epos, eloc, elen, inc)) == |
cb00ea35 | 1909 | (EXT_NEXT_EXTENT_ALLOCDECS >> 30)) { |
4b11111a | 1910 | int block; |
ff116fc8 JK |
1911 | epos->block = *eloc; |
1912 | epos->offset = sizeof(struct allocExtDesc); | |
3bf25cb4 | 1913 | brelse(epos->bh); |
4b11111a MS |
1914 | block = udf_get_lb_pblock(inode->i_sb, epos->block, 0); |
1915 | epos->bh = udf_tread(inode->i_sb, block); | |
1916 | if (!epos->bh) { | |
1917 | udf_debug("reading block %d failed!\n", block); | |
1da177e4 LT |
1918 | return -1; |
1919 | } | |
1920 | } | |
1921 | ||
1922 | return etype; | |
1923 | } | |
1924 | ||
4b11111a MS |
1925 | int8_t udf_current_aext(struct inode *inode, struct extent_position *epos, |
1926 | kernel_lb_addr *eloc, uint32_t *elen, int inc) | |
1da177e4 LT |
1927 | { |
1928 | int alen; | |
1929 | int8_t etype; | |
1930 | uint8_t *ptr; | |
28de7948 CG |
1931 | short_ad *sad; |
1932 | long_ad *lad; | |
48d6d8ff | 1933 | struct udf_inode_info *iinfo = UDF_I(inode); |
28de7948 | 1934 | |
cb00ea35 | 1935 | if (!epos->bh) { |
ff116fc8 JK |
1936 | if (!epos->offset) |
1937 | epos->offset = udf_file_entry_alloc_offset(inode); | |
48d6d8ff | 1938 | ptr = iinfo->i_ext.i_data + epos->offset - |
4b11111a | 1939 | udf_file_entry_alloc_offset(inode) + |
48d6d8ff | 1940 | iinfo->i_lenEAttr; |
4b11111a | 1941 | alen = udf_file_entry_alloc_offset(inode) + |
48d6d8ff | 1942 | iinfo->i_lenAlloc; |
cb00ea35 | 1943 | } else { |
ff116fc8 JK |
1944 | if (!epos->offset) |
1945 | epos->offset = sizeof(struct allocExtDesc); | |
1946 | ptr = epos->bh->b_data + epos->offset; | |
28de7948 | 1947 | alen = sizeof(struct allocExtDesc) + |
4b11111a MS |
1948 | le32_to_cpu(((struct allocExtDesc *)epos->bh->b_data)-> |
1949 | lengthAllocDescs); | |
1da177e4 LT |
1950 | } |
1951 | ||
48d6d8ff | 1952 | switch (iinfo->i_alloc_type) { |
cb00ea35 | 1953 | case ICBTAG_FLAG_AD_SHORT: |
4b11111a MS |
1954 | sad = udf_get_fileshortad(ptr, alen, &epos->offset, inc); |
1955 | if (!sad) | |
28de7948 CG |
1956 | return -1; |
1957 | etype = le32_to_cpu(sad->extLength) >> 30; | |
1958 | eloc->logicalBlockNum = le32_to_cpu(sad->extPosition); | |
4b11111a | 1959 | eloc->partitionReferenceNum = |
48d6d8ff | 1960 | iinfo->i_location.partitionReferenceNum; |
28de7948 CG |
1961 | *elen = le32_to_cpu(sad->extLength) & UDF_EXTENT_LENGTH_MASK; |
1962 | break; | |
cb00ea35 | 1963 | case ICBTAG_FLAG_AD_LONG: |
4b11111a MS |
1964 | lad = udf_get_filelongad(ptr, alen, &epos->offset, inc); |
1965 | if (!lad) | |
1da177e4 | 1966 | return -1; |
28de7948 CG |
1967 | etype = le32_to_cpu(lad->extLength) >> 30; |
1968 | *eloc = lelb_to_cpu(lad->extLocation); | |
1969 | *elen = le32_to_cpu(lad->extLength) & UDF_EXTENT_LENGTH_MASK; | |
1970 | break; | |
1971 | default: | |
4b11111a | 1972 | udf_debug("alloc_type = %d unsupported\n", |
48d6d8ff | 1973 | iinfo->i_alloc_type); |
28de7948 | 1974 | return -1; |
1da177e4 LT |
1975 | } |
1976 | ||
1977 | return etype; | |
1978 | } | |
1979 | ||
28de7948 CG |
1980 | static int8_t udf_insert_aext(struct inode *inode, struct extent_position epos, |
1981 | kernel_lb_addr neloc, uint32_t nelen) | |
1da177e4 LT |
1982 | { |
1983 | kernel_lb_addr oeloc; | |
1984 | uint32_t oelen; | |
1985 | int8_t etype; | |
1986 | ||
ff116fc8 | 1987 | if (epos.bh) |
3bf25cb4 | 1988 | get_bh(epos.bh); |
1da177e4 | 1989 | |
cb00ea35 | 1990 | while ((etype = udf_next_aext(inode, &epos, &oeloc, &oelen, 0)) != -1) { |
ff116fc8 | 1991 | udf_write_aext(inode, &epos, neloc, nelen, 1); |
1da177e4 LT |
1992 | neloc = oeloc; |
1993 | nelen = (etype << 30) | oelen; | |
1994 | } | |
ff116fc8 | 1995 | udf_add_aext(inode, &epos, neloc, nelen, 1); |
3bf25cb4 | 1996 | brelse(epos.bh); |
28de7948 | 1997 | |
1da177e4 LT |
1998 | return (nelen >> 30); |
1999 | } | |
2000 | ||
4b11111a | 2001 | int8_t udf_delete_aext(struct inode *inode, struct extent_position epos, |
cb00ea35 | 2002 | kernel_lb_addr eloc, uint32_t elen) |
1da177e4 | 2003 | { |
ff116fc8 JK |
2004 | struct extent_position oepos; |
2005 | int adsize; | |
1da177e4 LT |
2006 | int8_t etype; |
2007 | struct allocExtDesc *aed; | |
48d6d8ff | 2008 | struct udf_inode_info *iinfo; |
1da177e4 | 2009 | |
cb00ea35 | 2010 | if (epos.bh) { |
3bf25cb4 JK |
2011 | get_bh(epos.bh); |
2012 | get_bh(epos.bh); | |
1da177e4 LT |
2013 | } |
2014 | ||
48d6d8ff MS |
2015 | iinfo = UDF_I(inode); |
2016 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) | |
1da177e4 | 2017 | adsize = sizeof(short_ad); |
48d6d8ff | 2018 | else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
1da177e4 LT |
2019 | adsize = sizeof(long_ad); |
2020 | else | |
2021 | adsize = 0; | |
2022 | ||
ff116fc8 JK |
2023 | oepos = epos; |
2024 | if (udf_next_aext(inode, &epos, &eloc, &elen, 1) == -1) | |
1da177e4 LT |
2025 | return -1; |
2026 | ||
cb00ea35 | 2027 | while ((etype = udf_next_aext(inode, &epos, &eloc, &elen, 1)) != -1) { |
ff116fc8 | 2028 | udf_write_aext(inode, &oepos, eloc, (etype << 30) | elen, 1); |
cb00ea35 | 2029 | if (oepos.bh != epos.bh) { |
ff116fc8 | 2030 | oepos.block = epos.block; |
3bf25cb4 JK |
2031 | brelse(oepos.bh); |
2032 | get_bh(epos.bh); | |
ff116fc8 JK |
2033 | oepos.bh = epos.bh; |
2034 | oepos.offset = epos.offset - adsize; | |
1da177e4 LT |
2035 | } |
2036 | } | |
2037 | memset(&eloc, 0x00, sizeof(kernel_lb_addr)); | |
2038 | elen = 0; | |
2039 | ||
cb00ea35 | 2040 | if (epos.bh != oepos.bh) { |
ff116fc8 JK |
2041 | udf_free_blocks(inode->i_sb, inode, epos.block, 0, 1); |
2042 | udf_write_aext(inode, &oepos, eloc, elen, 1); | |
2043 | udf_write_aext(inode, &oepos, eloc, elen, 1); | |
cb00ea35 | 2044 | if (!oepos.bh) { |
48d6d8ff | 2045 | iinfo->i_lenAlloc -= (adsize * 2); |
1da177e4 | 2046 | mark_inode_dirty(inode); |
cb00ea35 | 2047 | } else { |
ff116fc8 | 2048 | aed = (struct allocExtDesc *)oepos.bh->b_data; |
1da177e4 | 2049 | aed->lengthAllocDescs = |
4b11111a MS |
2050 | cpu_to_le32(le32_to_cpu(aed->lengthAllocDescs) - |
2051 | (2 * adsize)); | |
28de7948 | 2052 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
6c79e987 | 2053 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) |
4b11111a MS |
2054 | udf_update_tag(oepos.bh->b_data, |
2055 | oepos.offset - (2 * adsize)); | |
1da177e4 | 2056 | else |
4b11111a MS |
2057 | udf_update_tag(oepos.bh->b_data, |
2058 | sizeof(struct allocExtDesc)); | |
ff116fc8 | 2059 | mark_buffer_dirty_inode(oepos.bh, inode); |
1da177e4 | 2060 | } |
cb00ea35 | 2061 | } else { |
ff116fc8 | 2062 | udf_write_aext(inode, &oepos, eloc, elen, 1); |
cb00ea35 | 2063 | if (!oepos.bh) { |
48d6d8ff | 2064 | iinfo->i_lenAlloc -= adsize; |
1da177e4 | 2065 | mark_inode_dirty(inode); |
cb00ea35 | 2066 | } else { |
ff116fc8 | 2067 | aed = (struct allocExtDesc *)oepos.bh->b_data; |
1da177e4 | 2068 | aed->lengthAllocDescs = |
4b11111a MS |
2069 | cpu_to_le32(le32_to_cpu(aed->lengthAllocDescs) - |
2070 | adsize); | |
28de7948 | 2071 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
6c79e987 | 2072 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) |
4b11111a MS |
2073 | udf_update_tag(oepos.bh->b_data, |
2074 | epos.offset - adsize); | |
1da177e4 | 2075 | else |
4b11111a MS |
2076 | udf_update_tag(oepos.bh->b_data, |
2077 | sizeof(struct allocExtDesc)); | |
ff116fc8 | 2078 | mark_buffer_dirty_inode(oepos.bh, inode); |
1da177e4 LT |
2079 | } |
2080 | } | |
647bd61a | 2081 | |
3bf25cb4 JK |
2082 | brelse(epos.bh); |
2083 | brelse(oepos.bh); | |
28de7948 | 2084 | |
1da177e4 LT |
2085 | return (elen >> 30); |
2086 | } | |
2087 | ||
4b11111a MS |
2088 | int8_t inode_bmap(struct inode *inode, sector_t block, |
2089 | struct extent_position *pos, kernel_lb_addr *eloc, | |
2090 | uint32_t *elen, sector_t *offset) | |
1da177e4 | 2091 | { |
4b11111a | 2092 | unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; |
cb00ea35 | 2093 | loff_t lbcount = 0, bcount = |
4b11111a | 2094 | (loff_t) block << blocksize_bits; |
1da177e4 | 2095 | int8_t etype; |
48d6d8ff | 2096 | struct udf_inode_info *iinfo; |
1da177e4 | 2097 | |
cb00ea35 | 2098 | if (block < 0) { |
1da177e4 LT |
2099 | printk(KERN_ERR "udf: inode_bmap: block < 0\n"); |
2100 | return -1; | |
2101 | } | |
1da177e4 | 2102 | |
48d6d8ff | 2103 | iinfo = UDF_I(inode); |
ff116fc8 | 2104 | pos->offset = 0; |
48d6d8ff | 2105 | pos->block = iinfo->i_location; |
ff116fc8 | 2106 | pos->bh = NULL; |
1da177e4 | 2107 | *elen = 0; |
1da177e4 | 2108 | |
cb00ea35 | 2109 | do { |
4b11111a MS |
2110 | etype = udf_next_aext(inode, pos, eloc, elen, 1); |
2111 | if (etype == -1) { | |
2112 | *offset = (bcount - lbcount) >> blocksize_bits; | |
48d6d8ff | 2113 | iinfo->i_lenExtents = lbcount; |
1da177e4 LT |
2114 | return -1; |
2115 | } | |
2116 | lbcount += *elen; | |
2117 | } while (lbcount <= bcount); | |
2118 | ||
4b11111a | 2119 | *offset = (bcount + *elen - lbcount) >> blocksize_bits; |
1da177e4 LT |
2120 | |
2121 | return etype; | |
2122 | } | |
2123 | ||
60448b1d | 2124 | long udf_block_map(struct inode *inode, sector_t block) |
1da177e4 | 2125 | { |
ff116fc8 JK |
2126 | kernel_lb_addr eloc; |
2127 | uint32_t elen; | |
60448b1d | 2128 | sector_t offset; |
28de7948 | 2129 | struct extent_position epos = {}; |
1da177e4 LT |
2130 | int ret; |
2131 | ||
2132 | lock_kernel(); | |
2133 | ||
4b11111a MS |
2134 | if (inode_bmap(inode, block, &epos, &eloc, &elen, &offset) == |
2135 | (EXT_RECORDED_ALLOCATED >> 30)) | |
60448b1d | 2136 | ret = udf_get_lb_pblock(inode->i_sb, eloc, offset); |
1da177e4 LT |
2137 | else |
2138 | ret = 0; | |
2139 | ||
2140 | unlock_kernel(); | |
3bf25cb4 | 2141 | brelse(epos.bh); |
1da177e4 LT |
2142 | |
2143 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_VARCONV)) | |
2144 | return udf_fixed_to_variable(ret); | |
2145 | else | |
2146 | return ret; | |
2147 | } |