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 | ||
b1e32126 | 69 | |
cb00ea35 | 70 | void udf_delete_inode(struct inode *inode) |
1da177e4 | 71 | { |
fef26658 MF |
72 | truncate_inode_pages(&inode->i_data, 0); |
73 | ||
1da177e4 LT |
74 | if (is_bad_inode(inode)) |
75 | goto no_delete; | |
76 | ||
77 | inode->i_size = 0; | |
78 | udf_truncate(inode); | |
79 | lock_kernel(); | |
80 | ||
81 | udf_update_inode(inode, IS_SYNC(inode)); | |
82 | udf_free_inode(inode); | |
83 | ||
84 | unlock_kernel(); | |
85 | return; | |
28de7948 CG |
86 | |
87 | no_delete: | |
1da177e4 LT |
88 | clear_inode(inode); |
89 | } | |
90 | ||
74584ae5 JK |
91 | /* |
92 | * If we are going to release inode from memory, we discard preallocation and | |
93 | * truncate last inode extent to proper length. We could use drop_inode() but | |
94 | * it's called under inode_lock and thus we cannot mark inode dirty there. We | |
95 | * use clear_inode() but we have to make sure to write inode as it's not written | |
96 | * automatically. | |
97 | */ | |
1da177e4 LT |
98 | void udf_clear_inode(struct inode *inode) |
99 | { | |
48d6d8ff | 100 | struct udf_inode_info *iinfo; |
1da177e4 LT |
101 | if (!(inode->i_sb->s_flags & MS_RDONLY)) { |
102 | lock_kernel(); | |
74584ae5 | 103 | /* Discard preallocation for directories, symlinks, etc. */ |
1da177e4 | 104 | udf_discard_prealloc(inode); |
74584ae5 | 105 | udf_truncate_tail_extent(inode); |
1da177e4 | 106 | unlock_kernel(); |
32a8f24d | 107 | write_inode_now(inode, 0); |
1da177e4 | 108 | } |
48d6d8ff MS |
109 | iinfo = UDF_I(inode); |
110 | kfree(iinfo->i_ext.i_data); | |
111 | iinfo->i_ext.i_data = NULL; | |
1da177e4 LT |
112 | } |
113 | ||
114 | static int udf_writepage(struct page *page, struct writeback_control *wbc) | |
115 | { | |
116 | return block_write_full_page(page, udf_get_block, wbc); | |
117 | } | |
118 | ||
119 | static int udf_readpage(struct file *file, struct page *page) | |
120 | { | |
121 | return block_read_full_page(page, udf_get_block); | |
122 | } | |
123 | ||
be021ee4 NP |
124 | static int udf_write_begin(struct file *file, struct address_space *mapping, |
125 | loff_t pos, unsigned len, unsigned flags, | |
126 | struct page **pagep, void **fsdata) | |
1da177e4 | 127 | { |
be021ee4 NP |
128 | *pagep = NULL; |
129 | return block_write_begin(file, mapping, pos, len, flags, pagep, fsdata, | |
130 | udf_get_block); | |
1da177e4 LT |
131 | } |
132 | ||
133 | static sector_t udf_bmap(struct address_space *mapping, sector_t block) | |
134 | { | |
cb00ea35 | 135 | return generic_block_bmap(mapping, block, udf_get_block); |
1da177e4 LT |
136 | } |
137 | ||
f5e54d6e | 138 | const struct address_space_operations udf_aops = { |
28de7948 CG |
139 | .readpage = udf_readpage, |
140 | .writepage = udf_writepage, | |
141 | .sync_page = block_sync_page, | |
be021ee4 NP |
142 | .write_begin = udf_write_begin, |
143 | .write_end = generic_write_end, | |
28de7948 | 144 | .bmap = udf_bmap, |
1da177e4 LT |
145 | }; |
146 | ||
cb00ea35 | 147 | void udf_expand_file_adinicb(struct inode *inode, int newsize, int *err) |
1da177e4 LT |
148 | { |
149 | struct page *page; | |
150 | char *kaddr; | |
48d6d8ff | 151 | struct udf_inode_info *iinfo = UDF_I(inode); |
1da177e4 LT |
152 | struct writeback_control udf_wbc = { |
153 | .sync_mode = WB_SYNC_NONE, | |
154 | .nr_to_write = 1, | |
155 | }; | |
156 | ||
157 | /* from now on we have normal address_space methods */ | |
158 | inode->i_data.a_ops = &udf_aops; | |
159 | ||
48d6d8ff | 160 | if (!iinfo->i_lenAlloc) { |
1da177e4 | 161 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) |
48d6d8ff | 162 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT; |
1da177e4 | 163 | else |
48d6d8ff | 164 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG; |
1da177e4 LT |
165 | mark_inode_dirty(inode); |
166 | return; | |
167 | } | |
168 | ||
169 | page = grab_cache_page(inode->i_mapping, 0); | |
cd7619d6 MM |
170 | BUG_ON(!PageLocked(page)); |
171 | ||
cb00ea35 | 172 | if (!PageUptodate(page)) { |
1da177e4 | 173 | kaddr = kmap(page); |
48d6d8ff MS |
174 | memset(kaddr + iinfo->i_lenAlloc, 0x00, |
175 | PAGE_CACHE_SIZE - iinfo->i_lenAlloc); | |
176 | memcpy(kaddr, iinfo->i_ext.i_data + iinfo->i_lenEAttr, | |
177 | iinfo->i_lenAlloc); | |
1da177e4 LT |
178 | flush_dcache_page(page); |
179 | SetPageUptodate(page); | |
180 | kunmap(page); | |
181 | } | |
48d6d8ff MS |
182 | memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr, 0x00, |
183 | iinfo->i_lenAlloc); | |
184 | iinfo->i_lenAlloc = 0; | |
1da177e4 | 185 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) |
48d6d8ff | 186 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT; |
1da177e4 | 187 | else |
48d6d8ff | 188 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG; |
1da177e4 LT |
189 | |
190 | inode->i_data.a_ops->writepage(page, &udf_wbc); | |
191 | page_cache_release(page); | |
192 | ||
193 | mark_inode_dirty(inode); | |
194 | } | |
195 | ||
cb00ea35 CG |
196 | struct buffer_head *udf_expand_dir_adinicb(struct inode *inode, int *block, |
197 | int *err) | |
1da177e4 LT |
198 | { |
199 | int newblock; | |
ff116fc8 JK |
200 | struct buffer_head *dbh = NULL; |
201 | kernel_lb_addr eloc; | |
202 | uint32_t elen; | |
1da177e4 | 203 | uint8_t alloctype; |
ff116fc8 | 204 | struct extent_position epos; |
1da177e4 LT |
205 | |
206 | struct udf_fileident_bh sfibh, dfibh; | |
af793295 JK |
207 | loff_t f_pos = udf_ext0_offset(inode); |
208 | int size = udf_ext0_offset(inode) + inode->i_size; | |
1da177e4 | 209 | struct fileIdentDesc cfi, *sfi, *dfi; |
48d6d8ff | 210 | struct udf_inode_info *iinfo = UDF_I(inode); |
1da177e4 LT |
211 | |
212 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) | |
213 | alloctype = ICBTAG_FLAG_AD_SHORT; | |
214 | else | |
215 | alloctype = ICBTAG_FLAG_AD_LONG; | |
216 | ||
cb00ea35 | 217 | if (!inode->i_size) { |
48d6d8ff | 218 | iinfo->i_alloc_type = alloctype; |
1da177e4 LT |
219 | mark_inode_dirty(inode); |
220 | return NULL; | |
221 | } | |
222 | ||
223 | /* alloc block, and copy data to it */ | |
224 | *block = udf_new_block(inode->i_sb, inode, | |
48d6d8ff MS |
225 | iinfo->i_location.partitionReferenceNum, |
226 | iinfo->i_location.logicalBlockNum, err); | |
1da177e4 LT |
227 | if (!(*block)) |
228 | return NULL; | |
229 | newblock = udf_get_pblock(inode->i_sb, *block, | |
48d6d8ff | 230 | iinfo->i_location.partitionReferenceNum, |
c0b34438 | 231 | 0); |
1da177e4 LT |
232 | if (!newblock) |
233 | return NULL; | |
234 | dbh = udf_tgetblk(inode->i_sb, newblock); | |
235 | if (!dbh) | |
236 | return NULL; | |
237 | lock_buffer(dbh); | |
238 | memset(dbh->b_data, 0x00, inode->i_sb->s_blocksize); | |
239 | set_buffer_uptodate(dbh); | |
240 | unlock_buffer(dbh); | |
241 | mark_buffer_dirty_inode(dbh, inode); | |
242 | ||
4b11111a | 243 | sfibh.soffset = sfibh.eoffset = |
af793295 | 244 | f_pos & (inode->i_sb->s_blocksize - 1); |
ff116fc8 | 245 | sfibh.sbh = sfibh.ebh = NULL; |
1da177e4 LT |
246 | dfibh.soffset = dfibh.eoffset = 0; |
247 | dfibh.sbh = dfibh.ebh = dbh; | |
af793295 | 248 | while (f_pos < size) { |
48d6d8ff | 249 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB; |
4b11111a MS |
250 | sfi = udf_fileident_read(inode, &f_pos, &sfibh, &cfi, NULL, |
251 | NULL, NULL, NULL); | |
cb00ea35 | 252 | if (!sfi) { |
3bf25cb4 | 253 | brelse(dbh); |
1da177e4 LT |
254 | return NULL; |
255 | } | |
48d6d8ff | 256 | iinfo->i_alloc_type = alloctype; |
1da177e4 LT |
257 | sfi->descTag.tagLocation = cpu_to_le32(*block); |
258 | dfibh.soffset = dfibh.eoffset; | |
259 | dfibh.eoffset += (sfibh.eoffset - sfibh.soffset); | |
260 | dfi = (struct fileIdentDesc *)(dbh->b_data + dfibh.soffset); | |
261 | if (udf_write_fi(inode, sfi, dfi, &dfibh, sfi->impUse, | |
4b11111a MS |
262 | sfi->fileIdent + |
263 | le16_to_cpu(sfi->lengthOfImpUse))) { | |
48d6d8ff | 264 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB; |
3bf25cb4 | 265 | brelse(dbh); |
1da177e4 LT |
266 | return NULL; |
267 | } | |
268 | } | |
269 | mark_buffer_dirty_inode(dbh, inode); | |
270 | ||
48d6d8ff MS |
271 | memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr, 0, |
272 | iinfo->i_lenAlloc); | |
273 | iinfo->i_lenAlloc = 0; | |
1da177e4 | 274 | eloc.logicalBlockNum = *block; |
4b11111a | 275 | eloc.partitionReferenceNum = |
48d6d8ff | 276 | iinfo->i_location.partitionReferenceNum; |
05343c4f | 277 | elen = inode->i_sb->s_blocksize; |
48d6d8ff | 278 | iinfo->i_lenExtents = elen; |
ff116fc8 | 279 | epos.bh = NULL; |
48d6d8ff | 280 | epos.block = iinfo->i_location; |
ff116fc8 JK |
281 | epos.offset = udf_file_entry_alloc_offset(inode); |
282 | udf_add_aext(inode, &epos, eloc, elen, 0); | |
1da177e4 LT |
283 | /* UniqueID stuff */ |
284 | ||
3bf25cb4 | 285 | brelse(epos.bh); |
1da177e4 LT |
286 | mark_inode_dirty(inode); |
287 | return dbh; | |
288 | } | |
289 | ||
cb00ea35 CG |
290 | static int udf_get_block(struct inode *inode, sector_t block, |
291 | struct buffer_head *bh_result, int create) | |
1da177e4 LT |
292 | { |
293 | int err, new; | |
294 | struct buffer_head *bh; | |
1ed16171 | 295 | sector_t phys = 0; |
48d6d8ff | 296 | struct udf_inode_info *iinfo; |
1da177e4 | 297 | |
cb00ea35 | 298 | if (!create) { |
1da177e4 LT |
299 | phys = udf_block_map(inode, block); |
300 | if (phys) | |
301 | map_bh(bh_result, inode->i_sb, phys); | |
302 | return 0; | |
303 | } | |
304 | ||
305 | err = -EIO; | |
306 | new = 0; | |
307 | bh = NULL; | |
308 | ||
309 | lock_kernel(); | |
310 | ||
48d6d8ff MS |
311 | iinfo = UDF_I(inode); |
312 | if (block == iinfo->i_next_alloc_block + 1) { | |
313 | iinfo->i_next_alloc_block++; | |
314 | iinfo->i_next_alloc_goal++; | |
1da177e4 LT |
315 | } |
316 | ||
317 | err = 0; | |
318 | ||
319 | bh = inode_getblk(inode, block, &err, &phys, &new); | |
2c2111c2 | 320 | BUG_ON(bh); |
1da177e4 LT |
321 | if (err) |
322 | goto abort; | |
2c2111c2 | 323 | BUG_ON(!phys); |
1da177e4 LT |
324 | |
325 | if (new) | |
326 | set_buffer_new(bh_result); | |
327 | map_bh(bh_result, inode->i_sb, phys); | |
28de7948 CG |
328 | |
329 | abort: | |
1da177e4 LT |
330 | unlock_kernel(); |
331 | return err; | |
1da177e4 LT |
332 | } |
333 | ||
cb00ea35 CG |
334 | static struct buffer_head *udf_getblk(struct inode *inode, long block, |
335 | int create, int *err) | |
1da177e4 | 336 | { |
28de7948 | 337 | struct buffer_head *bh; |
1da177e4 LT |
338 | struct buffer_head dummy; |
339 | ||
340 | dummy.b_state = 0; | |
341 | dummy.b_blocknr = -1000; | |
342 | *err = udf_get_block(inode, block, &dummy, create); | |
cb00ea35 | 343 | if (!*err && buffer_mapped(&dummy)) { |
1da177e4 | 344 | bh = sb_getblk(inode->i_sb, dummy.b_blocknr); |
cb00ea35 | 345 | if (buffer_new(&dummy)) { |
1da177e4 LT |
346 | lock_buffer(bh); |
347 | memset(bh->b_data, 0x00, inode->i_sb->s_blocksize); | |
348 | set_buffer_uptodate(bh); | |
349 | unlock_buffer(bh); | |
350 | mark_buffer_dirty_inode(bh, inode); | |
351 | } | |
352 | return bh; | |
353 | } | |
28de7948 | 354 | |
1da177e4 LT |
355 | return NULL; |
356 | } | |
357 | ||
31170b6a JK |
358 | /* Extend the file by 'blocks' blocks, return the number of extents added */ |
359 | int udf_extend_file(struct inode *inode, struct extent_position *last_pos, | |
4b11111a | 360 | kernel_long_ad *last_ext, sector_t blocks) |
31170b6a JK |
361 | { |
362 | sector_t add; | |
363 | int count = 0, fake = !(last_ext->extLength & UDF_EXTENT_LENGTH_MASK); | |
364 | struct super_block *sb = inode->i_sb; | |
28de7948 | 365 | kernel_lb_addr prealloc_loc = {}; |
31170b6a | 366 | int prealloc_len = 0; |
48d6d8ff | 367 | struct udf_inode_info *iinfo; |
31170b6a JK |
368 | |
369 | /* The previous extent is fake and we should not extend by anything | |
370 | * - there's nothing to do... */ | |
371 | if (!blocks && fake) | |
372 | return 0; | |
28de7948 | 373 | |
48d6d8ff | 374 | iinfo = UDF_I(inode); |
31170b6a JK |
375 | /* Round the last extent up to a multiple of block size */ |
376 | if (last_ext->extLength & (sb->s_blocksize - 1)) { | |
377 | last_ext->extLength = | |
28de7948 CG |
378 | (last_ext->extLength & UDF_EXTENT_FLAG_MASK) | |
379 | (((last_ext->extLength & UDF_EXTENT_LENGTH_MASK) + | |
380 | sb->s_blocksize - 1) & ~(sb->s_blocksize - 1)); | |
48d6d8ff MS |
381 | iinfo->i_lenExtents = |
382 | (iinfo->i_lenExtents + sb->s_blocksize - 1) & | |
28de7948 | 383 | ~(sb->s_blocksize - 1); |
31170b6a | 384 | } |
28de7948 | 385 | |
31170b6a | 386 | /* Last extent are just preallocated blocks? */ |
4b11111a MS |
387 | if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) == |
388 | EXT_NOT_RECORDED_ALLOCATED) { | |
31170b6a JK |
389 | /* Save the extent so that we can reattach it to the end */ |
390 | prealloc_loc = last_ext->extLocation; | |
391 | prealloc_len = last_ext->extLength; | |
392 | /* Mark the extent as a hole */ | |
393 | last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | | |
28de7948 | 394 | (last_ext->extLength & UDF_EXTENT_LENGTH_MASK); |
31170b6a | 395 | last_ext->extLocation.logicalBlockNum = 0; |
4b11111a | 396 | last_ext->extLocation.partitionReferenceNum = 0; |
31170b6a | 397 | } |
28de7948 | 398 | |
31170b6a | 399 | /* Can we merge with the previous extent? */ |
4b11111a MS |
400 | if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) == |
401 | EXT_NOT_RECORDED_NOT_ALLOCATED) { | |
402 | add = ((1 << 30) - sb->s_blocksize - | |
403 | (last_ext->extLength & UDF_EXTENT_LENGTH_MASK)) >> | |
404 | sb->s_blocksize_bits; | |
31170b6a JK |
405 | if (add > blocks) |
406 | add = blocks; | |
407 | blocks -= add; | |
408 | last_ext->extLength += add << sb->s_blocksize_bits; | |
409 | } | |
410 | ||
411 | if (fake) { | |
412 | udf_add_aext(inode, last_pos, last_ext->extLocation, | |
cb00ea35 | 413 | last_ext->extLength, 1); |
31170b6a | 414 | count++; |
4b11111a MS |
415 | } else |
416 | udf_write_aext(inode, last_pos, last_ext->extLocation, | |
417 | last_ext->extLength, 1); | |
28de7948 | 418 | |
31170b6a JK |
419 | /* Managed to do everything necessary? */ |
420 | if (!blocks) | |
421 | goto out; | |
422 | ||
423 | /* All further extents will be NOT_RECORDED_NOT_ALLOCATED */ | |
424 | last_ext->extLocation.logicalBlockNum = 0; | |
4b11111a | 425 | last_ext->extLocation.partitionReferenceNum = 0; |
28de7948 | 426 | add = (1 << (30-sb->s_blocksize_bits)) - 1; |
4b11111a MS |
427 | last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | |
428 | (add << sb->s_blocksize_bits); | |
28de7948 | 429 | |
31170b6a JK |
430 | /* Create enough extents to cover the whole hole */ |
431 | while (blocks > add) { | |
432 | blocks -= add; | |
433 | if (udf_add_aext(inode, last_pos, last_ext->extLocation, | |
cb00ea35 | 434 | last_ext->extLength, 1) == -1) |
31170b6a JK |
435 | return -1; |
436 | count++; | |
437 | } | |
438 | if (blocks) { | |
439 | last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | | |
28de7948 | 440 | (blocks << sb->s_blocksize_bits); |
31170b6a | 441 | if (udf_add_aext(inode, last_pos, last_ext->extLocation, |
cb00ea35 | 442 | last_ext->extLength, 1) == -1) |
31170b6a JK |
443 | return -1; |
444 | count++; | |
445 | } | |
28de7948 CG |
446 | |
447 | out: | |
31170b6a JK |
448 | /* Do we have some preallocated blocks saved? */ |
449 | if (prealloc_len) { | |
4b11111a MS |
450 | if (udf_add_aext(inode, last_pos, prealloc_loc, |
451 | prealloc_len, 1) == -1) | |
31170b6a JK |
452 | return -1; |
453 | last_ext->extLocation = prealloc_loc; | |
454 | last_ext->extLength = prealloc_len; | |
455 | count++; | |
456 | } | |
28de7948 | 457 | |
31170b6a | 458 | /* last_pos should point to the last written extent... */ |
48d6d8ff | 459 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
31170b6a | 460 | last_pos->offset -= sizeof(short_ad); |
48d6d8ff | 461 | else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
31170b6a JK |
462 | last_pos->offset -= sizeof(long_ad); |
463 | else | |
464 | return -1; | |
28de7948 | 465 | |
31170b6a JK |
466 | return count; |
467 | } | |
468 | ||
cb00ea35 | 469 | static struct buffer_head *inode_getblk(struct inode *inode, sector_t block, |
1ed16171 | 470 | int *err, sector_t *phys, int *new) |
1da177e4 | 471 | { |
31170b6a | 472 | static sector_t last_block; |
ff116fc8 | 473 | struct buffer_head *result = NULL; |
1da177e4 | 474 | kernel_long_ad laarr[EXTENT_MERGE_SIZE]; |
ff116fc8 | 475 | struct extent_position prev_epos, cur_epos, next_epos; |
1da177e4 | 476 | int count = 0, startnum = 0, endnum = 0; |
85d71244 JK |
477 | uint32_t elen = 0, tmpelen; |
478 | kernel_lb_addr eloc, tmpeloc; | |
1da177e4 | 479 | int c = 1; |
60448b1d JK |
480 | loff_t lbcount = 0, b_off = 0; |
481 | uint32_t newblocknum, newblock; | |
482 | sector_t offset = 0; | |
1da177e4 | 483 | int8_t etype; |
48d6d8ff MS |
484 | struct udf_inode_info *iinfo = UDF_I(inode); |
485 | int goal = 0, pgoal = iinfo->i_location.logicalBlockNum; | |
31170b6a | 486 | int lastblock = 0; |
1da177e4 | 487 | |
ff116fc8 | 488 | prev_epos.offset = udf_file_entry_alloc_offset(inode); |
48d6d8ff | 489 | prev_epos.block = iinfo->i_location; |
ff116fc8 JK |
490 | prev_epos.bh = NULL; |
491 | cur_epos = next_epos = prev_epos; | |
28de7948 | 492 | b_off = (loff_t)block << inode->i_sb->s_blocksize_bits; |
1da177e4 LT |
493 | |
494 | /* find the extent which contains the block we are looking for. | |
cb00ea35 CG |
495 | alternate between laarr[0] and laarr[1] for locations of the |
496 | current extent, and the previous extent */ | |
497 | do { | |
498 | if (prev_epos.bh != cur_epos.bh) { | |
3bf25cb4 JK |
499 | brelse(prev_epos.bh); |
500 | get_bh(cur_epos.bh); | |
ff116fc8 | 501 | prev_epos.bh = cur_epos.bh; |
1da177e4 | 502 | } |
cb00ea35 | 503 | if (cur_epos.bh != next_epos.bh) { |
3bf25cb4 JK |
504 | brelse(cur_epos.bh); |
505 | get_bh(next_epos.bh); | |
ff116fc8 | 506 | cur_epos.bh = next_epos.bh; |
1da177e4 LT |
507 | } |
508 | ||
509 | lbcount += elen; | |
510 | ||
ff116fc8 JK |
511 | prev_epos.block = cur_epos.block; |
512 | cur_epos.block = next_epos.block; | |
1da177e4 | 513 | |
ff116fc8 JK |
514 | prev_epos.offset = cur_epos.offset; |
515 | cur_epos.offset = next_epos.offset; | |
1da177e4 | 516 | |
4b11111a MS |
517 | etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 1); |
518 | if (etype == -1) | |
1da177e4 LT |
519 | break; |
520 | ||
521 | c = !c; | |
522 | ||
523 | laarr[c].extLength = (etype << 30) | elen; | |
524 | laarr[c].extLocation = eloc; | |
525 | ||
526 | if (etype != (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) | |
527 | pgoal = eloc.logicalBlockNum + | |
28de7948 CG |
528 | ((elen + inode->i_sb->s_blocksize - 1) >> |
529 | inode->i_sb->s_blocksize_bits); | |
1da177e4 | 530 | |
cb00ea35 | 531 | count++; |
1da177e4 LT |
532 | } while (lbcount + elen <= b_off); |
533 | ||
534 | b_off -= lbcount; | |
535 | offset = b_off >> inode->i_sb->s_blocksize_bits; | |
85d71244 JK |
536 | /* |
537 | * Move prev_epos and cur_epos into indirect extent if we are at | |
538 | * the pointer to it | |
539 | */ | |
540 | udf_next_aext(inode, &prev_epos, &tmpeloc, &tmpelen, 0); | |
541 | udf_next_aext(inode, &cur_epos, &tmpeloc, &tmpelen, 0); | |
1da177e4 LT |
542 | |
543 | /* if the extent is allocated and recorded, return the block | |
cb00ea35 | 544 | if the extent is not a multiple of the blocksize, round up */ |
1da177e4 | 545 | |
cb00ea35 CG |
546 | if (etype == (EXT_RECORDED_ALLOCATED >> 30)) { |
547 | if (elen & (inode->i_sb->s_blocksize - 1)) { | |
1da177e4 | 548 | elen = EXT_RECORDED_ALLOCATED | |
28de7948 CG |
549 | ((elen + inode->i_sb->s_blocksize - 1) & |
550 | ~(inode->i_sb->s_blocksize - 1)); | |
ff116fc8 | 551 | etype = udf_write_aext(inode, &cur_epos, eloc, elen, 1); |
1da177e4 | 552 | } |
3bf25cb4 JK |
553 | brelse(prev_epos.bh); |
554 | brelse(cur_epos.bh); | |
555 | brelse(next_epos.bh); | |
1da177e4 LT |
556 | newblock = udf_get_lb_pblock(inode->i_sb, eloc, offset); |
557 | *phys = newblock; | |
558 | return NULL; | |
559 | } | |
560 | ||
31170b6a JK |
561 | last_block = block; |
562 | /* Are we beyond EOF? */ | |
cb00ea35 | 563 | if (etype == -1) { |
31170b6a JK |
564 | int ret; |
565 | ||
566 | if (count) { | |
567 | if (c) | |
568 | laarr[0] = laarr[1]; | |
569 | startnum = 1; | |
cb00ea35 | 570 | } else { |
31170b6a | 571 | /* Create a fake extent when there's not one */ |
4b11111a MS |
572 | memset(&laarr[0].extLocation, 0x00, |
573 | sizeof(kernel_lb_addr)); | |
31170b6a | 574 | laarr[0].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED; |
4b11111a MS |
575 | /* Will udf_extend_file() create real extent from |
576 | a fake one? */ | |
31170b6a JK |
577 | startnum = (offset > 0); |
578 | } | |
579 | /* Create extents for the hole between EOF and offset */ | |
580 | ret = udf_extend_file(inode, &prev_epos, laarr, offset); | |
581 | if (ret == -1) { | |
582 | brelse(prev_epos.bh); | |
583 | brelse(cur_epos.bh); | |
584 | brelse(next_epos.bh); | |
585 | /* We don't really know the error here so we just make | |
586 | * something up */ | |
587 | *err = -ENOSPC; | |
588 | return NULL; | |
589 | } | |
590 | c = 0; | |
591 | offset = 0; | |
592 | count += ret; | |
593 | /* We are not covered by a preallocated extent? */ | |
4b11111a MS |
594 | if ((laarr[0].extLength & UDF_EXTENT_FLAG_MASK) != |
595 | EXT_NOT_RECORDED_ALLOCATED) { | |
31170b6a JK |
596 | /* Is there any real extent? - otherwise we overwrite |
597 | * the fake one... */ | |
598 | if (count) | |
599 | c = !c; | |
600 | laarr[c].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | | |
28de7948 | 601 | inode->i_sb->s_blocksize; |
4b11111a MS |
602 | memset(&laarr[c].extLocation, 0x00, |
603 | sizeof(kernel_lb_addr)); | |
cb00ea35 CG |
604 | count++; |
605 | endnum++; | |
31170b6a | 606 | } |
cb00ea35 | 607 | endnum = c + 1; |
1da177e4 | 608 | lastblock = 1; |
cb00ea35 | 609 | } else { |
1da177e4 LT |
610 | endnum = startnum = ((count > 2) ? 2 : count); |
611 | ||
4b11111a MS |
612 | /* if the current extent is in position 0, |
613 | swap it with the previous */ | |
cb00ea35 | 614 | if (!c && count != 1) { |
31170b6a JK |
615 | laarr[2] = laarr[0]; |
616 | laarr[0] = laarr[1]; | |
617 | laarr[1] = laarr[2]; | |
618 | c = 1; | |
619 | } | |
1da177e4 | 620 | |
4b11111a MS |
621 | /* if the current block is located in an extent, |
622 | read the next extent */ | |
623 | etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 0); | |
624 | if (etype != -1) { | |
cb00ea35 CG |
625 | laarr[c + 1].extLength = (etype << 30) | elen; |
626 | laarr[c + 1].extLocation = eloc; | |
627 | count++; | |
628 | startnum++; | |
629 | endnum++; | |
4b11111a | 630 | } else |
1da177e4 LT |
631 | lastblock = 1; |
632 | } | |
1da177e4 LT |
633 | |
634 | /* if the current extent is not recorded but allocated, get the | |
28de7948 | 635 | * block in the extent corresponding to the requested block */ |
4b11111a | 636 | if ((laarr[c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30)) |
1da177e4 | 637 | newblocknum = laarr[c].extLocation.logicalBlockNum + offset; |
4b11111a | 638 | else { /* otherwise, allocate a new block */ |
48d6d8ff MS |
639 | if (iinfo->i_next_alloc_block == block) |
640 | goal = iinfo->i_next_alloc_goal; | |
1da177e4 | 641 | |
cb00ea35 | 642 | if (!goal) { |
4b11111a | 643 | if (!(goal = pgoal)) /* XXX: what was intended here? */ |
48d6d8ff | 644 | goal = iinfo->i_location.logicalBlockNum + 1; |
1da177e4 LT |
645 | } |
646 | ||
4b11111a | 647 | newblocknum = udf_new_block(inode->i_sb, inode, |
48d6d8ff | 648 | iinfo->i_location.partitionReferenceNum, |
4b11111a MS |
649 | goal, err); |
650 | if (!newblocknum) { | |
3bf25cb4 | 651 | brelse(prev_epos.bh); |
1da177e4 LT |
652 | *err = -ENOSPC; |
653 | return NULL; | |
654 | } | |
48d6d8ff | 655 | iinfo->i_lenExtents += inode->i_sb->s_blocksize; |
1da177e4 LT |
656 | } |
657 | ||
4b11111a MS |
658 | /* if the extent the requsted block is located in contains multiple |
659 | * blocks, split the extent into at most three extents. blocks prior | |
660 | * to requested block, requested block, and blocks after requested | |
661 | * block */ | |
1da177e4 LT |
662 | udf_split_extents(inode, &c, offset, newblocknum, laarr, &endnum); |
663 | ||
664 | #ifdef UDF_PREALLOCATE | |
665 | /* preallocate blocks */ | |
666 | udf_prealloc_extents(inode, c, lastblock, laarr, &endnum); | |
667 | #endif | |
668 | ||
669 | /* merge any continuous blocks in laarr */ | |
670 | udf_merge_extents(inode, laarr, &endnum); | |
671 | ||
672 | /* write back the new extents, inserting new extents if the new number | |
28de7948 CG |
673 | * of extents is greater than the old number, and deleting extents if |
674 | * the new number of extents is less than the old number */ | |
ff116fc8 | 675 | udf_update_extents(inode, laarr, startnum, endnum, &prev_epos); |
1da177e4 | 676 | |
3bf25cb4 | 677 | brelse(prev_epos.bh); |
1da177e4 | 678 | |
4b11111a | 679 | newblock = udf_get_pblock(inode->i_sb, newblocknum, |
48d6d8ff | 680 | iinfo->i_location.partitionReferenceNum, 0); |
4b11111a | 681 | if (!newblock) |
1da177e4 | 682 | return NULL; |
1da177e4 LT |
683 | *phys = newblock; |
684 | *err = 0; | |
685 | *new = 1; | |
48d6d8ff MS |
686 | iinfo->i_next_alloc_block = block; |
687 | iinfo->i_next_alloc_goal = newblocknum; | |
1da177e4 LT |
688 | inode->i_ctime = current_fs_time(inode->i_sb); |
689 | ||
690 | if (IS_SYNC(inode)) | |
691 | udf_sync_inode(inode); | |
692 | else | |
693 | mark_inode_dirty(inode); | |
28de7948 | 694 | |
1da177e4 LT |
695 | return result; |
696 | } | |
697 | ||
cb00ea35 CG |
698 | static void udf_split_extents(struct inode *inode, int *c, int offset, |
699 | int newblocknum, | |
700 | kernel_long_ad laarr[EXTENT_MERGE_SIZE], | |
701 | int *endnum) | |
1da177e4 | 702 | { |
4b11111a MS |
703 | unsigned long blocksize = inode->i_sb->s_blocksize; |
704 | unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; | |
705 | ||
1da177e4 | 706 | if ((laarr[*c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30) || |
4b11111a MS |
707 | (laarr[*c].extLength >> 30) == |
708 | (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) { | |
1da177e4 LT |
709 | int curr = *c; |
710 | int blen = ((laarr[curr].extLength & UDF_EXTENT_LENGTH_MASK) + | |
4b11111a | 711 | blocksize - 1) >> blocksize_bits; |
1da177e4 LT |
712 | int8_t etype = (laarr[curr].extLength >> 30); |
713 | ||
4b11111a | 714 | if (blen == 1) |
28de7948 | 715 | ; |
4b11111a | 716 | else if (!offset || blen == offset + 1) { |
cb00ea35 CG |
717 | laarr[curr + 2] = laarr[curr + 1]; |
718 | laarr[curr + 1] = laarr[curr]; | |
719 | } else { | |
720 | laarr[curr + 3] = laarr[curr + 1]; | |
721 | laarr[curr + 2] = laarr[curr + 1] = laarr[curr]; | |
722 | } | |
723 | ||
724 | if (offset) { | |
725 | if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30)) { | |
4b11111a MS |
726 | udf_free_blocks(inode->i_sb, inode, |
727 | laarr[curr].extLocation, | |
728 | 0, offset); | |
729 | laarr[curr].extLength = | |
730 | EXT_NOT_RECORDED_NOT_ALLOCATED | | |
731 | (offset << blocksize_bits); | |
1da177e4 | 732 | laarr[curr].extLocation.logicalBlockNum = 0; |
4b11111a MS |
733 | laarr[curr].extLocation. |
734 | partitionReferenceNum = 0; | |
735 | } else | |
1da177e4 | 736 | laarr[curr].extLength = (etype << 30) | |
4b11111a | 737 | (offset << blocksize_bits); |
cb00ea35 CG |
738 | curr++; |
739 | (*c)++; | |
740 | (*endnum)++; | |
1da177e4 | 741 | } |
647bd61a | 742 | |
1da177e4 LT |
743 | laarr[curr].extLocation.logicalBlockNum = newblocknum; |
744 | if (etype == (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) | |
745 | laarr[curr].extLocation.partitionReferenceNum = | |
c0b34438 | 746 | UDF_I(inode)->i_location.partitionReferenceNum; |
1da177e4 | 747 | laarr[curr].extLength = EXT_RECORDED_ALLOCATED | |
4b11111a | 748 | blocksize; |
cb00ea35 | 749 | curr++; |
1da177e4 | 750 | |
cb00ea35 | 751 | if (blen != offset + 1) { |
1da177e4 | 752 | if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30)) |
4b11111a MS |
753 | laarr[curr].extLocation.logicalBlockNum += |
754 | offset + 1; | |
28de7948 | 755 | laarr[curr].extLength = (etype << 30) | |
4b11111a | 756 | ((blen - (offset + 1)) << blocksize_bits); |
cb00ea35 CG |
757 | curr++; |
758 | (*endnum)++; | |
1da177e4 LT |
759 | } |
760 | } | |
761 | } | |
762 | ||
763 | static void udf_prealloc_extents(struct inode *inode, int c, int lastblock, | |
cb00ea35 CG |
764 | kernel_long_ad laarr[EXTENT_MERGE_SIZE], |
765 | int *endnum) | |
1da177e4 LT |
766 | { |
767 | int start, length = 0, currlength = 0, i; | |
768 | ||
cb00ea35 | 769 | if (*endnum >= (c + 1)) { |
1da177e4 LT |
770 | if (!lastblock) |
771 | return; | |
772 | else | |
773 | start = c; | |
cb00ea35 | 774 | } else { |
4b11111a MS |
775 | if ((laarr[c + 1].extLength >> 30) == |
776 | (EXT_NOT_RECORDED_ALLOCATED >> 30)) { | |
cb00ea35 | 777 | start = c + 1; |
4b11111a MS |
778 | length = currlength = |
779 | (((laarr[c + 1].extLength & | |
780 | UDF_EXTENT_LENGTH_MASK) + | |
781 | inode->i_sb->s_blocksize - 1) >> | |
782 | inode->i_sb->s_blocksize_bits); | |
783 | } else | |
1da177e4 LT |
784 | start = c; |
785 | } | |
786 | ||
cb00ea35 CG |
787 | for (i = start + 1; i <= *endnum; i++) { |
788 | if (i == *endnum) { | |
1da177e4 LT |
789 | if (lastblock) |
790 | length += UDF_DEFAULT_PREALLOC_BLOCKS; | |
4b11111a MS |
791 | } else if ((laarr[i].extLength >> 30) == |
792 | (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) { | |
793 | length += (((laarr[i].extLength & | |
794 | UDF_EXTENT_LENGTH_MASK) + | |
795 | inode->i_sb->s_blocksize - 1) >> | |
796 | inode->i_sb->s_blocksize_bits); | |
797 | } else | |
1da177e4 LT |
798 | break; |
799 | } | |
800 | ||
cb00ea35 | 801 | if (length) { |
1da177e4 | 802 | int next = laarr[start].extLocation.logicalBlockNum + |
28de7948 | 803 | (((laarr[start].extLength & UDF_EXTENT_LENGTH_MASK) + |
4b11111a MS |
804 | inode->i_sb->s_blocksize - 1) >> |
805 | inode->i_sb->s_blocksize_bits); | |
1da177e4 | 806 | int numalloc = udf_prealloc_blocks(inode->i_sb, inode, |
4b11111a MS |
807 | laarr[start].extLocation.partitionReferenceNum, |
808 | next, (UDF_DEFAULT_PREALLOC_BLOCKS > length ? | |
809 | length : UDF_DEFAULT_PREALLOC_BLOCKS) - | |
810 | currlength); | |
28de7948 | 811 | if (numalloc) { |
4b11111a | 812 | if (start == (c + 1)) |
1da177e4 | 813 | laarr[start].extLength += |
4b11111a MS |
814 | (numalloc << |
815 | inode->i_sb->s_blocksize_bits); | |
816 | else { | |
cb00ea35 CG |
817 | memmove(&laarr[c + 2], &laarr[c + 1], |
818 | sizeof(long_ad) * (*endnum - (c + 1))); | |
819 | (*endnum)++; | |
820 | laarr[c + 1].extLocation.logicalBlockNum = next; | |
821 | laarr[c + 1].extLocation.partitionReferenceNum = | |
4b11111a MS |
822 | laarr[c].extLocation. |
823 | partitionReferenceNum; | |
824 | laarr[c + 1].extLength = | |
825 | EXT_NOT_RECORDED_ALLOCATED | | |
826 | (numalloc << | |
827 | inode->i_sb->s_blocksize_bits); | |
cb00ea35 | 828 | start = c + 1; |
1da177e4 LT |
829 | } |
830 | ||
cb00ea35 | 831 | for (i = start + 1; numalloc && i < *endnum; i++) { |
4b11111a MS |
832 | int elen = ((laarr[i].extLength & |
833 | UDF_EXTENT_LENGTH_MASK) + | |
834 | inode->i_sb->s_blocksize - 1) >> | |
835 | inode->i_sb->s_blocksize_bits; | |
1da177e4 | 836 | |
cb00ea35 | 837 | if (elen > numalloc) { |
1da177e4 | 838 | laarr[i].extLength -= |
4b11111a MS |
839 | (numalloc << |
840 | inode->i_sb->s_blocksize_bits); | |
1da177e4 | 841 | numalloc = 0; |
cb00ea35 | 842 | } else { |
1da177e4 | 843 | numalloc -= elen; |
cb00ea35 | 844 | if (*endnum > (i + 1)) |
4b11111a MS |
845 | memmove(&laarr[i], |
846 | &laarr[i + 1], | |
847 | sizeof(long_ad) * | |
848 | (*endnum - (i + 1))); | |
cb00ea35 CG |
849 | i--; |
850 | (*endnum)--; | |
1da177e4 LT |
851 | } |
852 | } | |
c0b34438 | 853 | UDF_I(inode)->i_lenExtents += |
4b11111a | 854 | numalloc << inode->i_sb->s_blocksize_bits; |
1da177e4 LT |
855 | } |
856 | } | |
857 | } | |
858 | ||
859 | static void udf_merge_extents(struct inode *inode, | |
cb00ea35 CG |
860 | kernel_long_ad laarr[EXTENT_MERGE_SIZE], |
861 | int *endnum) | |
1da177e4 LT |
862 | { |
863 | int i; | |
4b11111a MS |
864 | unsigned long blocksize = inode->i_sb->s_blocksize; |
865 | unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; | |
1da177e4 | 866 | |
cb00ea35 | 867 | for (i = 0; i < (*endnum - 1); i++) { |
4b11111a MS |
868 | kernel_long_ad *li /*l[i]*/ = &laarr[i]; |
869 | kernel_long_ad *lip1 /*l[i plus 1]*/ = &laarr[i + 1]; | |
870 | ||
871 | if (((li->extLength >> 30) == (lip1->extLength >> 30)) && | |
872 | (((li->extLength >> 30) == | |
873 | (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) || | |
874 | ((lip1->extLocation.logicalBlockNum - | |
875 | li->extLocation.logicalBlockNum) == | |
876 | (((li->extLength & UDF_EXTENT_LENGTH_MASK) + | |
877 | blocksize - 1) >> blocksize_bits)))) { | |
878 | ||
879 | if (((li->extLength & UDF_EXTENT_LENGTH_MASK) + | |
880 | (lip1->extLength & UDF_EXTENT_LENGTH_MASK) + | |
881 | blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) { | |
882 | lip1->extLength = (lip1->extLength - | |
883 | (li->extLength & | |
884 | UDF_EXTENT_LENGTH_MASK) + | |
885 | UDF_EXTENT_LENGTH_MASK) & | |
886 | ~(blocksize - 1); | |
887 | li->extLength = (li->extLength & | |
888 | UDF_EXTENT_FLAG_MASK) + | |
889 | (UDF_EXTENT_LENGTH_MASK + 1) - | |
890 | blocksize; | |
891 | lip1->extLocation.logicalBlockNum = | |
892 | li->extLocation.logicalBlockNum + | |
893 | ((li->extLength & | |
894 | UDF_EXTENT_LENGTH_MASK) >> | |
895 | blocksize_bits); | |
896 | } else { | |
897 | li->extLength = lip1->extLength + | |
898 | (((li->extLength & | |
899 | UDF_EXTENT_LENGTH_MASK) + | |
900 | blocksize - 1) & ~(blocksize - 1)); | |
901 | if (*endnum > (i + 2)) | |
902 | memmove(&laarr[i + 1], &laarr[i + 2], | |
903 | sizeof(long_ad) * | |
904 | (*endnum - (i + 2))); | |
905 | i--; | |
906 | (*endnum)--; | |
1da177e4 | 907 | } |
4b11111a MS |
908 | } else if (((li->extLength >> 30) == |
909 | (EXT_NOT_RECORDED_ALLOCATED >> 30)) && | |
910 | ((lip1->extLength >> 30) == | |
911 | (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))) { | |
912 | udf_free_blocks(inode->i_sb, inode, li->extLocation, 0, | |
913 | ((li->extLength & | |
914 | UDF_EXTENT_LENGTH_MASK) + | |
915 | blocksize - 1) >> blocksize_bits); | |
916 | li->extLocation.logicalBlockNum = 0; | |
917 | li->extLocation.partitionReferenceNum = 0; | |
918 | ||
919 | if (((li->extLength & UDF_EXTENT_LENGTH_MASK) + | |
920 | (lip1->extLength & UDF_EXTENT_LENGTH_MASK) + | |
921 | blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) { | |
922 | lip1->extLength = (lip1->extLength - | |
923 | (li->extLength & | |
924 | UDF_EXTENT_LENGTH_MASK) + | |
925 | UDF_EXTENT_LENGTH_MASK) & | |
926 | ~(blocksize - 1); | |
927 | li->extLength = (li->extLength & | |
928 | UDF_EXTENT_FLAG_MASK) + | |
929 | (UDF_EXTENT_LENGTH_MASK + 1) - | |
930 | blocksize; | |
cb00ea35 | 931 | } else { |
4b11111a MS |
932 | li->extLength = lip1->extLength + |
933 | (((li->extLength & | |
934 | UDF_EXTENT_LENGTH_MASK) + | |
935 | blocksize - 1) & ~(blocksize - 1)); | |
cb00ea35 CG |
936 | if (*endnum > (i + 2)) |
937 | memmove(&laarr[i + 1], &laarr[i + 2], | |
4b11111a MS |
938 | sizeof(long_ad) * |
939 | (*endnum - (i + 2))); | |
cb00ea35 CG |
940 | i--; |
941 | (*endnum)--; | |
1da177e4 | 942 | } |
4b11111a MS |
943 | } else if ((li->extLength >> 30) == |
944 | (EXT_NOT_RECORDED_ALLOCATED >> 30)) { | |
945 | udf_free_blocks(inode->i_sb, inode, | |
946 | li->extLocation, 0, | |
947 | ((li->extLength & | |
948 | UDF_EXTENT_LENGTH_MASK) + | |
949 | blocksize - 1) >> blocksize_bits); | |
950 | li->extLocation.logicalBlockNum = 0; | |
951 | li->extLocation.partitionReferenceNum = 0; | |
952 | li->extLength = (li->extLength & | |
953 | UDF_EXTENT_LENGTH_MASK) | | |
954 | EXT_NOT_RECORDED_NOT_ALLOCATED; | |
1da177e4 LT |
955 | } |
956 | } | |
957 | } | |
958 | ||
959 | static void udf_update_extents(struct inode *inode, | |
cb00ea35 CG |
960 | kernel_long_ad laarr[EXTENT_MERGE_SIZE], |
961 | int startnum, int endnum, | |
962 | struct extent_position *epos) | |
1da177e4 LT |
963 | { |
964 | int start = 0, i; | |
965 | kernel_lb_addr tmploc; | |
966 | uint32_t tmplen; | |
967 | ||
cb00ea35 CG |
968 | if (startnum > endnum) { |
969 | for (i = 0; i < (startnum - endnum); i++) | |
ff116fc8 | 970 | udf_delete_aext(inode, *epos, laarr[i].extLocation, |
cb00ea35 CG |
971 | laarr[i].extLength); |
972 | } else if (startnum < endnum) { | |
973 | for (i = 0; i < (endnum - startnum); i++) { | |
ff116fc8 | 974 | udf_insert_aext(inode, *epos, laarr[i].extLocation, |
cb00ea35 | 975 | laarr[i].extLength); |
ff116fc8 | 976 | udf_next_aext(inode, epos, &laarr[i].extLocation, |
cb00ea35 CG |
977 | &laarr[i].extLength, 1); |
978 | start++; | |
1da177e4 LT |
979 | } |
980 | } | |
981 | ||
cb00ea35 | 982 | for (i = start; i < endnum; i++) { |
ff116fc8 JK |
983 | udf_next_aext(inode, epos, &tmploc, &tmplen, 0); |
984 | udf_write_aext(inode, epos, laarr[i].extLocation, | |
cb00ea35 | 985 | laarr[i].extLength, 1); |
1da177e4 LT |
986 | } |
987 | } | |
988 | ||
cb00ea35 CG |
989 | struct buffer_head *udf_bread(struct inode *inode, int block, |
990 | int create, int *err) | |
1da177e4 | 991 | { |
cb00ea35 | 992 | struct buffer_head *bh = NULL; |
1da177e4 LT |
993 | |
994 | bh = udf_getblk(inode, block, create, err); | |
995 | if (!bh) | |
996 | return NULL; | |
997 | ||
998 | if (buffer_uptodate(bh)) | |
999 | return bh; | |
28de7948 | 1000 | |
1da177e4 | 1001 | ll_rw_block(READ, 1, &bh); |
28de7948 | 1002 | |
1da177e4 LT |
1003 | wait_on_buffer(bh); |
1004 | if (buffer_uptodate(bh)) | |
1005 | return bh; | |
28de7948 | 1006 | |
1da177e4 LT |
1007 | brelse(bh); |
1008 | *err = -EIO; | |
1009 | return NULL; | |
1010 | } | |
1011 | ||
cb00ea35 | 1012 | void udf_truncate(struct inode *inode) |
1da177e4 LT |
1013 | { |
1014 | int offset; | |
1015 | int err; | |
48d6d8ff | 1016 | struct udf_inode_info *iinfo; |
1da177e4 LT |
1017 | |
1018 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || | |
cb00ea35 | 1019 | S_ISLNK(inode->i_mode))) |
1da177e4 LT |
1020 | return; |
1021 | if (IS_APPEND(inode) || IS_IMMUTABLE(inode)) | |
1022 | return; | |
1023 | ||
1024 | lock_kernel(); | |
48d6d8ff MS |
1025 | iinfo = UDF_I(inode); |
1026 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { | |
4b11111a MS |
1027 | if (inode->i_sb->s_blocksize < |
1028 | (udf_file_entry_alloc_offset(inode) + | |
1029 | inode->i_size)) { | |
1da177e4 | 1030 | udf_expand_file_adinicb(inode, inode->i_size, &err); |
48d6d8ff MS |
1031 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { |
1032 | inode->i_size = iinfo->i_lenAlloc; | |
1da177e4 LT |
1033 | unlock_kernel(); |
1034 | return; | |
4b11111a | 1035 | } else |
1da177e4 | 1036 | udf_truncate_extents(inode); |
cb00ea35 | 1037 | } else { |
1da177e4 | 1038 | offset = inode->i_size & (inode->i_sb->s_blocksize - 1); |
48d6d8ff | 1039 | memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr + offset, |
c0b34438 | 1040 | 0x00, inode->i_sb->s_blocksize - |
4b11111a | 1041 | offset - udf_file_entry_alloc_offset(inode)); |
48d6d8ff | 1042 | iinfo->i_lenAlloc = inode->i_size; |
1da177e4 | 1043 | } |
cb00ea35 | 1044 | } else { |
4b11111a MS |
1045 | block_truncate_page(inode->i_mapping, inode->i_size, |
1046 | udf_get_block); | |
1da177e4 | 1047 | udf_truncate_extents(inode); |
647bd61a | 1048 | } |
1da177e4 LT |
1049 | |
1050 | inode->i_mtime = inode->i_ctime = current_fs_time(inode->i_sb); | |
1051 | if (IS_SYNC(inode)) | |
cb00ea35 | 1052 | udf_sync_inode(inode); |
1da177e4 LT |
1053 | else |
1054 | mark_inode_dirty(inode); | |
1055 | unlock_kernel(); | |
1056 | } | |
1057 | ||
cb00ea35 | 1058 | static void __udf_read_inode(struct inode *inode) |
1da177e4 LT |
1059 | { |
1060 | struct buffer_head *bh = NULL; | |
1061 | struct fileEntry *fe; | |
1062 | uint16_t ident; | |
48d6d8ff | 1063 | struct udf_inode_info *iinfo = UDF_I(inode); |
1da177e4 LT |
1064 | |
1065 | /* | |
1066 | * Set defaults, but the inode is still incomplete! | |
1067 | * Note: get_new_inode() sets the following on a new inode: | |
1068 | * i_sb = sb | |
1069 | * i_no = ino | |
1070 | * i_flags = sb->s_flags | |
1071 | * i_state = 0 | |
1072 | * clean_inode(): zero fills and sets | |
1073 | * i_count = 1 | |
1074 | * i_nlink = 1 | |
1075 | * i_op = NULL; | |
1076 | */ | |
48d6d8ff | 1077 | bh = udf_read_ptagged(inode->i_sb, iinfo->i_location, 0, &ident); |
cb00ea35 | 1078 | if (!bh) { |
1da177e4 | 1079 | printk(KERN_ERR "udf: udf_read_inode(ino %ld) failed !bh\n", |
cb00ea35 | 1080 | inode->i_ino); |
1da177e4 LT |
1081 | make_bad_inode(inode); |
1082 | return; | |
1083 | } | |
1084 | ||
1085 | if (ident != TAG_IDENT_FE && ident != TAG_IDENT_EFE && | |
cb00ea35 | 1086 | ident != TAG_IDENT_USE) { |
4b11111a MS |
1087 | printk(KERN_ERR "udf: udf_read_inode(ino %ld) " |
1088 | "failed ident=%d\n", inode->i_ino, ident); | |
3bf25cb4 | 1089 | brelse(bh); |
1da177e4 LT |
1090 | make_bad_inode(inode); |
1091 | return; | |
1092 | } | |
1093 | ||
1094 | fe = (struct fileEntry *)bh->b_data; | |
1095 | ||
5e0f0017 | 1096 | if (fe->icbTag.strategyType == cpu_to_le16(4096)) { |
1ab92785 | 1097 | struct buffer_head *ibh; |
1da177e4 | 1098 | |
48d6d8ff | 1099 | ibh = udf_read_ptagged(inode->i_sb, iinfo->i_location, 1, |
4b11111a | 1100 | &ident); |
1ab92785 | 1101 | if (ident == TAG_IDENT_IE && ibh) { |
1102 | struct buffer_head *nbh = NULL; | |
1103 | kernel_lb_addr loc; | |
1104 | struct indirectEntry *ie; | |
1105 | ||
1106 | ie = (struct indirectEntry *)ibh->b_data; | |
1107 | loc = lelb_to_cpu(ie->indirectICB.extLocation); | |
1108 | ||
1109 | if (ie->indirectICB.extLength && | |
1110 | (nbh = udf_read_ptagged(inode->i_sb, loc, 0, | |
1111 | &ident))) { | |
1112 | if (ident == TAG_IDENT_FE || | |
1113 | ident == TAG_IDENT_EFE) { | |
1114 | memcpy(&iinfo->i_location, | |
1115 | &loc, | |
1116 | sizeof(kernel_lb_addr)); | |
1117 | brelse(bh); | |
3bf25cb4 | 1118 | brelse(ibh); |
1ab92785 | 1119 | brelse(nbh); |
1120 | __udf_read_inode(inode); | |
1121 | return; | |
28de7948 | 1122 | } |
1ab92785 | 1123 | brelse(nbh); |
1da177e4 | 1124 | } |
28de7948 | 1125 | } |
1ab92785 | 1126 | brelse(ibh); |
5e0f0017 | 1127 | } else if (fe->icbTag.strategyType != cpu_to_le16(4)) { |
1da177e4 | 1128 | printk(KERN_ERR "udf: unsupported strategy type: %d\n", |
cb00ea35 | 1129 | le16_to_cpu(fe->icbTag.strategyType)); |
3bf25cb4 | 1130 | brelse(bh); |
1da177e4 LT |
1131 | make_bad_inode(inode); |
1132 | return; | |
1133 | } | |
1134 | udf_fill_inode(inode, bh); | |
31170b6a | 1135 | |
3bf25cb4 | 1136 | brelse(bh); |
1da177e4 LT |
1137 | } |
1138 | ||
1139 | static void udf_fill_inode(struct inode *inode, struct buffer_head *bh) | |
1140 | { | |
1141 | struct fileEntry *fe; | |
1142 | struct extendedFileEntry *efe; | |
1da177e4 | 1143 | int offset; |
6c79e987 | 1144 | struct udf_sb_info *sbi = UDF_SB(inode->i_sb); |
48d6d8ff | 1145 | struct udf_inode_info *iinfo = UDF_I(inode); |
1da177e4 LT |
1146 | |
1147 | fe = (struct fileEntry *)bh->b_data; | |
1148 | efe = (struct extendedFileEntry *)bh->b_data; | |
1149 | ||
5e0f0017 | 1150 | if (fe->icbTag.strategyType == cpu_to_le16(4)) |
48d6d8ff | 1151 | iinfo->i_strat4096 = 0; |
5e0f0017 | 1152 | else /* if (fe->icbTag.strategyType == cpu_to_le16(4096)) */ |
48d6d8ff | 1153 | iinfo->i_strat4096 = 1; |
1da177e4 | 1154 | |
48d6d8ff | 1155 | iinfo->i_alloc_type = le16_to_cpu(fe->icbTag.flags) & |
4b11111a | 1156 | ICBTAG_FLAG_AD_MASK; |
48d6d8ff MS |
1157 | iinfo->i_unique = 0; |
1158 | iinfo->i_lenEAttr = 0; | |
1159 | iinfo->i_lenExtents = 0; | |
1160 | iinfo->i_lenAlloc = 0; | |
1161 | iinfo->i_next_alloc_block = 0; | |
1162 | iinfo->i_next_alloc_goal = 0; | |
5e0f0017 | 1163 | if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_EFE)) { |
48d6d8ff MS |
1164 | iinfo->i_efe = 1; |
1165 | iinfo->i_use = 0; | |
4b11111a MS |
1166 | if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize - |
1167 | sizeof(struct extendedFileEntry))) { | |
647bd61a CG |
1168 | make_bad_inode(inode); |
1169 | return; | |
1170 | } | |
48d6d8ff | 1171 | memcpy(iinfo->i_ext.i_data, |
4b11111a MS |
1172 | bh->b_data + sizeof(struct extendedFileEntry), |
1173 | inode->i_sb->s_blocksize - | |
1174 | sizeof(struct extendedFileEntry)); | |
5e0f0017 | 1175 | } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_FE)) { |
48d6d8ff MS |
1176 | iinfo->i_efe = 0; |
1177 | iinfo->i_use = 0; | |
4b11111a MS |
1178 | if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize - |
1179 | sizeof(struct fileEntry))) { | |
647bd61a CG |
1180 | make_bad_inode(inode); |
1181 | return; | |
1182 | } | |
48d6d8ff | 1183 | memcpy(iinfo->i_ext.i_data, |
c0b34438 | 1184 | bh->b_data + sizeof(struct fileEntry), |
cb00ea35 | 1185 | inode->i_sb->s_blocksize - sizeof(struct fileEntry)); |
5e0f0017 | 1186 | } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_USE)) { |
48d6d8ff MS |
1187 | iinfo->i_efe = 0; |
1188 | iinfo->i_use = 1; | |
1189 | iinfo->i_lenAlloc = le32_to_cpu( | |
4b11111a MS |
1190 | ((struct unallocSpaceEntry *)bh->b_data)-> |
1191 | lengthAllocDescs); | |
1192 | if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize - | |
1193 | sizeof(struct unallocSpaceEntry))) { | |
647bd61a CG |
1194 | make_bad_inode(inode); |
1195 | return; | |
1196 | } | |
48d6d8ff | 1197 | memcpy(iinfo->i_ext.i_data, |
4b11111a MS |
1198 | bh->b_data + sizeof(struct unallocSpaceEntry), |
1199 | inode->i_sb->s_blocksize - | |
1200 | sizeof(struct unallocSpaceEntry)); | |
1da177e4 LT |
1201 | return; |
1202 | } | |
1203 | ||
1204 | inode->i_uid = le32_to_cpu(fe->uid); | |
ca76d2d8 CG |
1205 | if (inode->i_uid == -1 || |
1206 | UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_IGNORE) || | |
1207 | UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_SET)) | |
4d6660eb | 1208 | inode->i_uid = UDF_SB(inode->i_sb)->s_uid; |
1da177e4 LT |
1209 | |
1210 | inode->i_gid = le32_to_cpu(fe->gid); | |
ca76d2d8 CG |
1211 | if (inode->i_gid == -1 || |
1212 | UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_IGNORE) || | |
1213 | UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_SET)) | |
4d6660eb | 1214 | inode->i_gid = UDF_SB(inode->i_sb)->s_gid; |
1da177e4 LT |
1215 | |
1216 | inode->i_nlink = le16_to_cpu(fe->fileLinkCount); | |
1217 | if (!inode->i_nlink) | |
1218 | inode->i_nlink = 1; | |
647bd61a | 1219 | |
1da177e4 | 1220 | inode->i_size = le64_to_cpu(fe->informationLength); |
48d6d8ff | 1221 | iinfo->i_lenExtents = inode->i_size; |
1da177e4 LT |
1222 | |
1223 | inode->i_mode = udf_convert_permissions(fe); | |
1224 | inode->i_mode &= ~UDF_SB(inode->i_sb)->s_umask; | |
1225 | ||
48d6d8ff | 1226 | if (iinfo->i_efe == 0) { |
1da177e4 | 1227 | inode->i_blocks = le64_to_cpu(fe->logicalBlocksRecorded) << |
28de7948 | 1228 | (inode->i_sb->s_blocksize_bits - 9); |
1da177e4 | 1229 | |
56774805 | 1230 | if (!udf_disk_stamp_to_time(&inode->i_atime, fe->accessTime)) |
cbf5676a | 1231 | inode->i_atime = sbi->s_record_time; |
1232 | ||
56774805 MS |
1233 | if (!udf_disk_stamp_to_time(&inode->i_mtime, |
1234 | fe->modificationTime)) | |
cbf5676a | 1235 | inode->i_mtime = sbi->s_record_time; |
1236 | ||
56774805 | 1237 | if (!udf_disk_stamp_to_time(&inode->i_ctime, fe->attrTime)) |
cbf5676a | 1238 | inode->i_ctime = sbi->s_record_time; |
1da177e4 | 1239 | |
48d6d8ff MS |
1240 | iinfo->i_unique = le64_to_cpu(fe->uniqueID); |
1241 | iinfo->i_lenEAttr = le32_to_cpu(fe->lengthExtendedAttr); | |
1242 | iinfo->i_lenAlloc = le32_to_cpu(fe->lengthAllocDescs); | |
1243 | offset = sizeof(struct fileEntry) + iinfo->i_lenEAttr; | |
cb00ea35 | 1244 | } else { |
647bd61a | 1245 | inode->i_blocks = le64_to_cpu(efe->logicalBlocksRecorded) << |
cb00ea35 | 1246 | (inode->i_sb->s_blocksize_bits - 9); |
1da177e4 | 1247 | |
56774805 | 1248 | if (!udf_disk_stamp_to_time(&inode->i_atime, efe->accessTime)) |
cbf5676a | 1249 | inode->i_atime = sbi->s_record_time; |
1250 | ||
56774805 MS |
1251 | if (!udf_disk_stamp_to_time(&inode->i_mtime, |
1252 | efe->modificationTime)) | |
cbf5676a | 1253 | inode->i_mtime = sbi->s_record_time; |
1254 | ||
56774805 | 1255 | if (!udf_disk_stamp_to_time(&iinfo->i_crtime, efe->createTime)) |
cbf5676a | 1256 | iinfo->i_crtime = sbi->s_record_time; |
1257 | ||
56774805 | 1258 | if (!udf_disk_stamp_to_time(&inode->i_ctime, efe->attrTime)) |
cbf5676a | 1259 | inode->i_ctime = sbi->s_record_time; |
1da177e4 | 1260 | |
48d6d8ff MS |
1261 | iinfo->i_unique = le64_to_cpu(efe->uniqueID); |
1262 | iinfo->i_lenEAttr = le32_to_cpu(efe->lengthExtendedAttr); | |
1263 | iinfo->i_lenAlloc = le32_to_cpu(efe->lengthAllocDescs); | |
4b11111a | 1264 | offset = sizeof(struct extendedFileEntry) + |
48d6d8ff | 1265 | iinfo->i_lenEAttr; |
1da177e4 LT |
1266 | } |
1267 | ||
cb00ea35 CG |
1268 | switch (fe->icbTag.fileType) { |
1269 | case ICBTAG_FILE_TYPE_DIRECTORY: | |
28de7948 CG |
1270 | inode->i_op = &udf_dir_inode_operations; |
1271 | inode->i_fop = &udf_dir_operations; | |
1272 | inode->i_mode |= S_IFDIR; | |
1273 | inc_nlink(inode); | |
1274 | break; | |
cb00ea35 CG |
1275 | case ICBTAG_FILE_TYPE_REALTIME: |
1276 | case ICBTAG_FILE_TYPE_REGULAR: | |
1277 | case ICBTAG_FILE_TYPE_UNDEF: | |
742e1795 | 1278 | case ICBTAG_FILE_TYPE_VAT20: |
48d6d8ff | 1279 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
28de7948 CG |
1280 | inode->i_data.a_ops = &udf_adinicb_aops; |
1281 | else | |
1282 | inode->i_data.a_ops = &udf_aops; | |
1283 | inode->i_op = &udf_file_inode_operations; | |
1284 | inode->i_fop = &udf_file_operations; | |
1285 | inode->i_mode |= S_IFREG; | |
1286 | break; | |
cb00ea35 | 1287 | case ICBTAG_FILE_TYPE_BLOCK: |
28de7948 CG |
1288 | inode->i_mode |= S_IFBLK; |
1289 | break; | |
cb00ea35 | 1290 | case ICBTAG_FILE_TYPE_CHAR: |
28de7948 CG |
1291 | inode->i_mode |= S_IFCHR; |
1292 | break; | |
cb00ea35 | 1293 | case ICBTAG_FILE_TYPE_FIFO: |
28de7948 CG |
1294 | init_special_inode(inode, inode->i_mode | S_IFIFO, 0); |
1295 | break; | |
cb00ea35 | 1296 | case ICBTAG_FILE_TYPE_SOCKET: |
28de7948 CG |
1297 | init_special_inode(inode, inode->i_mode | S_IFSOCK, 0); |
1298 | break; | |
cb00ea35 | 1299 | case ICBTAG_FILE_TYPE_SYMLINK: |
28de7948 CG |
1300 | inode->i_data.a_ops = &udf_symlink_aops; |
1301 | inode->i_op = &page_symlink_inode_operations; | |
1302 | inode->i_mode = S_IFLNK | S_IRWXUGO; | |
1303 | break; | |
cb00ea35 | 1304 | default: |
4b11111a MS |
1305 | printk(KERN_ERR "udf: udf_fill_inode(ino %ld) failed unknown " |
1306 | "file type=%d\n", inode->i_ino, | |
1307 | fe->icbTag.fileType); | |
28de7948 CG |
1308 | make_bad_inode(inode); |
1309 | return; | |
1da177e4 | 1310 | } |
cb00ea35 | 1311 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { |
4b11111a MS |
1312 | struct deviceSpec *dsea = |
1313 | (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1); | |
cb00ea35 CG |
1314 | if (dsea) { |
1315 | init_special_inode(inode, inode->i_mode, | |
4b11111a MS |
1316 | MKDEV(le32_to_cpu(dsea->majorDeviceIdent), |
1317 | le32_to_cpu(dsea->minorDeviceIdent))); | |
1da177e4 | 1318 | /* Developer ID ??? */ |
4b11111a | 1319 | } else |
1da177e4 | 1320 | make_bad_inode(inode); |
1da177e4 LT |
1321 | } |
1322 | } | |
1323 | ||
647bd61a CG |
1324 | static int udf_alloc_i_data(struct inode *inode, size_t size) |
1325 | { | |
48d6d8ff MS |
1326 | struct udf_inode_info *iinfo = UDF_I(inode); |
1327 | iinfo->i_ext.i_data = kmalloc(size, GFP_KERNEL); | |
647bd61a | 1328 | |
48d6d8ff | 1329 | if (!iinfo->i_ext.i_data) { |
4b11111a MS |
1330 | printk(KERN_ERR "udf:udf_alloc_i_data (ino %ld) " |
1331 | "no free memory\n", inode->i_ino); | |
647bd61a CG |
1332 | return -ENOMEM; |
1333 | } | |
1334 | ||
1335 | return 0; | |
1336 | } | |
1337 | ||
cb00ea35 | 1338 | static mode_t udf_convert_permissions(struct fileEntry *fe) |
1da177e4 LT |
1339 | { |
1340 | mode_t mode; | |
1341 | uint32_t permissions; | |
1342 | uint32_t flags; | |
1343 | ||
1344 | permissions = le32_to_cpu(fe->permissions); | |
1345 | flags = le16_to_cpu(fe->icbTag.flags); | |
1346 | ||
4b11111a MS |
1347 | mode = ((permissions) & S_IRWXO) | |
1348 | ((permissions >> 2) & S_IRWXG) | | |
1349 | ((permissions >> 4) & S_IRWXU) | | |
1350 | ((flags & ICBTAG_FLAG_SETUID) ? S_ISUID : 0) | | |
1351 | ((flags & ICBTAG_FLAG_SETGID) ? S_ISGID : 0) | | |
1352 | ((flags & ICBTAG_FLAG_STICKY) ? S_ISVTX : 0); | |
1da177e4 LT |
1353 | |
1354 | return mode; | |
1355 | } | |
1356 | ||
cb00ea35 | 1357 | int udf_write_inode(struct inode *inode, int sync) |
1da177e4 LT |
1358 | { |
1359 | int ret; | |
28de7948 | 1360 | |
1da177e4 LT |
1361 | lock_kernel(); |
1362 | ret = udf_update_inode(inode, sync); | |
1363 | unlock_kernel(); | |
28de7948 | 1364 | |
1da177e4 LT |
1365 | return ret; |
1366 | } | |
1367 | ||
cb00ea35 | 1368 | int udf_sync_inode(struct inode *inode) |
1da177e4 LT |
1369 | { |
1370 | return udf_update_inode(inode, 1); | |
1371 | } | |
1372 | ||
cb00ea35 | 1373 | static int udf_update_inode(struct inode *inode, int do_sync) |
1da177e4 LT |
1374 | { |
1375 | struct buffer_head *bh = NULL; | |
1376 | struct fileEntry *fe; | |
1377 | struct extendedFileEntry *efe; | |
1378 | uint32_t udfperms; | |
1379 | uint16_t icbflags; | |
1380 | uint16_t crclen; | |
1da177e4 | 1381 | int err = 0; |
6c79e987 | 1382 | struct udf_sb_info *sbi = UDF_SB(inode->i_sb); |
4b11111a | 1383 | unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; |
48d6d8ff | 1384 | struct udf_inode_info *iinfo = UDF_I(inode); |
1da177e4 | 1385 | |
4b11111a MS |
1386 | bh = udf_tread(inode->i_sb, |
1387 | udf_get_lb_pblock(inode->i_sb, | |
48d6d8ff | 1388 | iinfo->i_location, 0)); |
cb00ea35 | 1389 | if (!bh) { |
1da177e4 LT |
1390 | udf_debug("bread failure\n"); |
1391 | return -EIO; | |
1392 | } | |
1393 | ||
1394 | memset(bh->b_data, 0x00, inode->i_sb->s_blocksize); | |
1395 | ||
1396 | fe = (struct fileEntry *)bh->b_data; | |
1397 | efe = (struct extendedFileEntry *)bh->b_data; | |
1398 | ||
5e0f0017 | 1399 | if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_USE)) { |
1da177e4 | 1400 | struct unallocSpaceEntry *use = |
28de7948 | 1401 | (struct unallocSpaceEntry *)bh->b_data; |
1da177e4 | 1402 | |
48d6d8ff | 1403 | use->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc); |
4b11111a | 1404 | memcpy(bh->b_data + sizeof(struct unallocSpaceEntry), |
48d6d8ff | 1405 | iinfo->i_ext.i_data, inode->i_sb->s_blocksize - |
4b11111a MS |
1406 | sizeof(struct unallocSpaceEntry)); |
1407 | crclen = sizeof(struct unallocSpaceEntry) + | |
48d6d8ff | 1408 | iinfo->i_lenAlloc - sizeof(tag); |
4b11111a | 1409 | use->descTag.tagLocation = cpu_to_le32( |
48d6d8ff | 1410 | iinfo->i_location. |
4b11111a | 1411 | logicalBlockNum); |
1da177e4 | 1412 | use->descTag.descCRCLength = cpu_to_le16(crclen); |
4b11111a MS |
1413 | use->descTag.descCRC = cpu_to_le16(udf_crc((char *)use + |
1414 | sizeof(tag), crclen, | |
1415 | 0)); | |
3f2587bb | 1416 | use->descTag.tagChecksum = udf_tag_checksum(&use->descTag); |
1da177e4 LT |
1417 | |
1418 | mark_buffer_dirty(bh); | |
3bf25cb4 | 1419 | brelse(bh); |
1da177e4 LT |
1420 | return err; |
1421 | } | |
1422 | ||
4d6660eb PS |
1423 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_FORGET)) |
1424 | fe->uid = cpu_to_le32(-1); | |
cb00ea35 CG |
1425 | else |
1426 | fe->uid = cpu_to_le32(inode->i_uid); | |
1da177e4 | 1427 | |
4d6660eb PS |
1428 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_FORGET)) |
1429 | fe->gid = cpu_to_le32(-1); | |
cb00ea35 CG |
1430 | else |
1431 | fe->gid = cpu_to_le32(inode->i_gid); | |
1da177e4 | 1432 | |
4b11111a MS |
1433 | udfperms = ((inode->i_mode & S_IRWXO)) | |
1434 | ((inode->i_mode & S_IRWXG) << 2) | | |
1435 | ((inode->i_mode & S_IRWXU) << 4); | |
1da177e4 | 1436 | |
4b11111a MS |
1437 | udfperms |= (le32_to_cpu(fe->permissions) & |
1438 | (FE_PERM_O_DELETE | FE_PERM_O_CHATTR | | |
1439 | FE_PERM_G_DELETE | FE_PERM_G_CHATTR | | |
1440 | FE_PERM_U_DELETE | FE_PERM_U_CHATTR)); | |
1da177e4 LT |
1441 | fe->permissions = cpu_to_le32(udfperms); |
1442 | ||
1443 | if (S_ISDIR(inode->i_mode)) | |
1444 | fe->fileLinkCount = cpu_to_le16(inode->i_nlink - 1); | |
1445 | else | |
1446 | fe->fileLinkCount = cpu_to_le16(inode->i_nlink); | |
1447 | ||
1448 | fe->informationLength = cpu_to_le64(inode->i_size); | |
1449 | ||
cb00ea35 | 1450 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { |
1da177e4 | 1451 | regid *eid; |
28de7948 CG |
1452 | struct deviceSpec *dsea = |
1453 | (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1); | |
cb00ea35 | 1454 | if (!dsea) { |
1da177e4 | 1455 | dsea = (struct deviceSpec *) |
28de7948 CG |
1456 | udf_add_extendedattr(inode, |
1457 | sizeof(struct deviceSpec) + | |
1458 | sizeof(regid), 12, 0x3); | |
1da177e4 LT |
1459 | dsea->attrType = cpu_to_le32(12); |
1460 | dsea->attrSubtype = 1; | |
4b11111a MS |
1461 | dsea->attrLength = cpu_to_le32( |
1462 | sizeof(struct deviceSpec) + | |
1463 | sizeof(regid)); | |
1da177e4 LT |
1464 | dsea->impUseLength = cpu_to_le32(sizeof(regid)); |
1465 | } | |
28de7948 | 1466 | eid = (regid *)dsea->impUse; |
1da177e4 LT |
1467 | memset(eid, 0, sizeof(regid)); |
1468 | strcpy(eid->ident, UDF_ID_DEVELOPER); | |
1469 | eid->identSuffix[0] = UDF_OS_CLASS_UNIX; | |
1470 | eid->identSuffix[1] = UDF_OS_ID_LINUX; | |
1471 | dsea->majorDeviceIdent = cpu_to_le32(imajor(inode)); | |
1472 | dsea->minorDeviceIdent = cpu_to_le32(iminor(inode)); | |
1473 | } | |
1474 | ||
48d6d8ff | 1475 | if (iinfo->i_efe == 0) { |
c0b34438 | 1476 | memcpy(bh->b_data + sizeof(struct fileEntry), |
48d6d8ff | 1477 | iinfo->i_ext.i_data, |
cb00ea35 | 1478 | inode->i_sb->s_blocksize - sizeof(struct fileEntry)); |
28de7948 | 1479 | fe->logicalBlocksRecorded = cpu_to_le64( |
4b11111a MS |
1480 | (inode->i_blocks + (1 << (blocksize_bits - 9)) - 1) >> |
1481 | (blocksize_bits - 9)); | |
1da177e4 | 1482 | |
56774805 MS |
1483 | udf_time_to_disk_stamp(&fe->accessTime, inode->i_atime); |
1484 | udf_time_to_disk_stamp(&fe->modificationTime, inode->i_mtime); | |
1485 | udf_time_to_disk_stamp(&fe->attrTime, inode->i_ctime); | |
1da177e4 LT |
1486 | memset(&(fe->impIdent), 0, sizeof(regid)); |
1487 | strcpy(fe->impIdent.ident, UDF_ID_DEVELOPER); | |
1488 | fe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; | |
1489 | fe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; | |
48d6d8ff MS |
1490 | fe->uniqueID = cpu_to_le64(iinfo->i_unique); |
1491 | fe->lengthExtendedAttr = cpu_to_le32(iinfo->i_lenEAttr); | |
1492 | fe->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc); | |
1da177e4 LT |
1493 | fe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_FE); |
1494 | crclen = sizeof(struct fileEntry); | |
cb00ea35 | 1495 | } else { |
4b11111a | 1496 | memcpy(bh->b_data + sizeof(struct extendedFileEntry), |
48d6d8ff | 1497 | iinfo->i_ext.i_data, |
4b11111a MS |
1498 | inode->i_sb->s_blocksize - |
1499 | sizeof(struct extendedFileEntry)); | |
1da177e4 | 1500 | efe->objectSize = cpu_to_le64(inode->i_size); |
28de7948 | 1501 | efe->logicalBlocksRecorded = cpu_to_le64( |
4b11111a MS |
1502 | (inode->i_blocks + (1 << (blocksize_bits - 9)) - 1) >> |
1503 | (blocksize_bits - 9)); | |
1da177e4 | 1504 | |
48d6d8ff MS |
1505 | if (iinfo->i_crtime.tv_sec > inode->i_atime.tv_sec || |
1506 | (iinfo->i_crtime.tv_sec == inode->i_atime.tv_sec && | |
1507 | iinfo->i_crtime.tv_nsec > inode->i_atime.tv_nsec)) | |
1508 | iinfo->i_crtime = inode->i_atime; | |
4b11111a | 1509 | |
48d6d8ff MS |
1510 | if (iinfo->i_crtime.tv_sec > inode->i_mtime.tv_sec || |
1511 | (iinfo->i_crtime.tv_sec == inode->i_mtime.tv_sec && | |
1512 | iinfo->i_crtime.tv_nsec > inode->i_mtime.tv_nsec)) | |
1513 | iinfo->i_crtime = inode->i_mtime; | |
4b11111a | 1514 | |
48d6d8ff MS |
1515 | if (iinfo->i_crtime.tv_sec > inode->i_ctime.tv_sec || |
1516 | (iinfo->i_crtime.tv_sec == inode->i_ctime.tv_sec && | |
1517 | iinfo->i_crtime.tv_nsec > inode->i_ctime.tv_nsec)) | |
1518 | iinfo->i_crtime = inode->i_ctime; | |
1da177e4 | 1519 | |
56774805 MS |
1520 | udf_time_to_disk_stamp(&efe->accessTime, inode->i_atime); |
1521 | udf_time_to_disk_stamp(&efe->modificationTime, inode->i_mtime); | |
1522 | udf_time_to_disk_stamp(&efe->createTime, iinfo->i_crtime); | |
1523 | udf_time_to_disk_stamp(&efe->attrTime, inode->i_ctime); | |
1da177e4 LT |
1524 | |
1525 | memset(&(efe->impIdent), 0, sizeof(regid)); | |
1526 | strcpy(efe->impIdent.ident, UDF_ID_DEVELOPER); | |
1527 | efe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; | |
1528 | efe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; | |
48d6d8ff MS |
1529 | efe->uniqueID = cpu_to_le64(iinfo->i_unique); |
1530 | efe->lengthExtendedAttr = cpu_to_le32(iinfo->i_lenEAttr); | |
1531 | efe->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc); | |
1da177e4 LT |
1532 | efe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_EFE); |
1533 | crclen = sizeof(struct extendedFileEntry); | |
1534 | } | |
48d6d8ff | 1535 | if (iinfo->i_strat4096) { |
1da177e4 LT |
1536 | fe->icbTag.strategyType = cpu_to_le16(4096); |
1537 | fe->icbTag.strategyParameter = cpu_to_le16(1); | |
1538 | fe->icbTag.numEntries = cpu_to_le16(2); | |
cb00ea35 | 1539 | } else { |
1da177e4 LT |
1540 | fe->icbTag.strategyType = cpu_to_le16(4); |
1541 | fe->icbTag.numEntries = cpu_to_le16(1); | |
1542 | } | |
1543 | ||
1544 | if (S_ISDIR(inode->i_mode)) | |
1545 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_DIRECTORY; | |
1546 | else if (S_ISREG(inode->i_mode)) | |
1547 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_REGULAR; | |
1548 | else if (S_ISLNK(inode->i_mode)) | |
1549 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_SYMLINK; | |
1550 | else if (S_ISBLK(inode->i_mode)) | |
1551 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_BLOCK; | |
1552 | else if (S_ISCHR(inode->i_mode)) | |
1553 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_CHAR; | |
1554 | else if (S_ISFIFO(inode->i_mode)) | |
1555 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_FIFO; | |
1556 | else if (S_ISSOCK(inode->i_mode)) | |
1557 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_SOCKET; | |
1558 | ||
48d6d8ff | 1559 | icbflags = iinfo->i_alloc_type | |
28de7948 CG |
1560 | ((inode->i_mode & S_ISUID) ? ICBTAG_FLAG_SETUID : 0) | |
1561 | ((inode->i_mode & S_ISGID) ? ICBTAG_FLAG_SETGID : 0) | | |
1562 | ((inode->i_mode & S_ISVTX) ? ICBTAG_FLAG_STICKY : 0) | | |
1563 | (le16_to_cpu(fe->icbTag.flags) & | |
1564 | ~(ICBTAG_FLAG_AD_MASK | ICBTAG_FLAG_SETUID | | |
1565 | ICBTAG_FLAG_SETGID | ICBTAG_FLAG_STICKY)); | |
1da177e4 LT |
1566 | |
1567 | fe->icbTag.flags = cpu_to_le16(icbflags); | |
6c79e987 | 1568 | if (sbi->s_udfrev >= 0x0200) |
1da177e4 LT |
1569 | fe->descTag.descVersion = cpu_to_le16(3); |
1570 | else | |
1571 | fe->descTag.descVersion = cpu_to_le16(2); | |
6c79e987 | 1572 | fe->descTag.tagSerialNum = cpu_to_le16(sbi->s_serial_number); |
4b11111a | 1573 | fe->descTag.tagLocation = cpu_to_le32( |
48d6d8ff MS |
1574 | iinfo->i_location.logicalBlockNum); |
1575 | crclen += iinfo->i_lenEAttr + iinfo->i_lenAlloc - | |
c0b34438 | 1576 | sizeof(tag); |
1da177e4 | 1577 | fe->descTag.descCRCLength = cpu_to_le16(crclen); |
4b11111a MS |
1578 | fe->descTag.descCRC = cpu_to_le16(udf_crc((char *)fe + sizeof(tag), |
1579 | crclen, 0)); | |
3f2587bb | 1580 | fe->descTag.tagChecksum = udf_tag_checksum(&fe->descTag); |
1da177e4 LT |
1581 | |
1582 | /* write the data blocks */ | |
1583 | mark_buffer_dirty(bh); | |
cb00ea35 | 1584 | if (do_sync) { |
1da177e4 | 1585 | sync_dirty_buffer(bh); |
cb00ea35 | 1586 | if (buffer_req(bh) && !buffer_uptodate(bh)) { |
4b11111a MS |
1587 | printk(KERN_WARNING "IO error syncing udf inode " |
1588 | "[%s:%08lx]\n", inode->i_sb->s_id, | |
1589 | inode->i_ino); | |
1da177e4 LT |
1590 | err = -EIO; |
1591 | } | |
1592 | } | |
3bf25cb4 | 1593 | brelse(bh); |
28de7948 | 1594 | |
1da177e4 LT |
1595 | return err; |
1596 | } | |
1597 | ||
cb00ea35 | 1598 | struct inode *udf_iget(struct super_block *sb, kernel_lb_addr ino) |
1da177e4 LT |
1599 | { |
1600 | unsigned long block = udf_get_lb_pblock(sb, ino, 0); | |
1601 | struct inode *inode = iget_locked(sb, block); | |
1602 | ||
1603 | if (!inode) | |
1604 | return NULL; | |
1605 | ||
1606 | if (inode->i_state & I_NEW) { | |
c0b34438 | 1607 | memcpy(&UDF_I(inode)->i_location, &ino, sizeof(kernel_lb_addr)); |
1da177e4 LT |
1608 | __udf_read_inode(inode); |
1609 | unlock_new_inode(inode); | |
1610 | } | |
1611 | ||
1612 | if (is_bad_inode(inode)) | |
1613 | goto out_iput; | |
1614 | ||
4b11111a MS |
1615 | if (ino.logicalBlockNum >= UDF_SB(sb)-> |
1616 | s_partmaps[ino.partitionReferenceNum].s_partition_len) { | |
1da177e4 | 1617 | udf_debug("block=%d, partition=%d out of range\n", |
cb00ea35 | 1618 | ino.logicalBlockNum, ino.partitionReferenceNum); |
1da177e4 LT |
1619 | make_bad_inode(inode); |
1620 | goto out_iput; | |
1621 | } | |
1622 | ||
1623 | return inode; | |
1624 | ||
28de7948 | 1625 | out_iput: |
1da177e4 LT |
1626 | iput(inode); |
1627 | return NULL; | |
1628 | } | |
1629 | ||
4b11111a | 1630 | int8_t udf_add_aext(struct inode *inode, struct extent_position *epos, |
cb00ea35 | 1631 | kernel_lb_addr eloc, uint32_t elen, int inc) |
1da177e4 LT |
1632 | { |
1633 | int adsize; | |
1634 | short_ad *sad = NULL; | |
1635 | long_ad *lad = NULL; | |
1636 | struct allocExtDesc *aed; | |
1637 | int8_t etype; | |
1638 | uint8_t *ptr; | |
48d6d8ff | 1639 | struct udf_inode_info *iinfo = UDF_I(inode); |
1da177e4 | 1640 | |
ff116fc8 | 1641 | if (!epos->bh) |
48d6d8ff | 1642 | ptr = iinfo->i_ext.i_data + epos->offset - |
4b11111a | 1643 | udf_file_entry_alloc_offset(inode) + |
48d6d8ff | 1644 | iinfo->i_lenEAttr; |
1da177e4 | 1645 | else |
ff116fc8 | 1646 | ptr = epos->bh->b_data + epos->offset; |
1da177e4 | 1647 | |
48d6d8ff | 1648 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
1da177e4 | 1649 | adsize = sizeof(short_ad); |
48d6d8ff | 1650 | else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
1da177e4 LT |
1651 | adsize = sizeof(long_ad); |
1652 | else | |
1653 | return -1; | |
1654 | ||
cb00ea35 | 1655 | if (epos->offset + (2 * adsize) > inode->i_sb->s_blocksize) { |
1da177e4 LT |
1656 | char *sptr, *dptr; |
1657 | struct buffer_head *nbh; | |
1658 | int err, loffset; | |
ff116fc8 | 1659 | kernel_lb_addr obloc = epos->block; |
1da177e4 | 1660 | |
4b11111a MS |
1661 | epos->block.logicalBlockNum = udf_new_block(inode->i_sb, NULL, |
1662 | obloc.partitionReferenceNum, | |
1663 | obloc.logicalBlockNum, &err); | |
1664 | if (!epos->block.logicalBlockNum) | |
1da177e4 | 1665 | return -1; |
4b11111a MS |
1666 | nbh = udf_tgetblk(inode->i_sb, udf_get_lb_pblock(inode->i_sb, |
1667 | epos->block, | |
1668 | 0)); | |
1669 | if (!nbh) | |
1da177e4 | 1670 | return -1; |
1da177e4 LT |
1671 | lock_buffer(nbh); |
1672 | memset(nbh->b_data, 0x00, inode->i_sb->s_blocksize); | |
1673 | set_buffer_uptodate(nbh); | |
1674 | unlock_buffer(nbh); | |
1675 | mark_buffer_dirty_inode(nbh, inode); | |
1676 | ||
1677 | aed = (struct allocExtDesc *)(nbh->b_data); | |
1678 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT)) | |
4b11111a MS |
1679 | aed->previousAllocExtLocation = |
1680 | cpu_to_le32(obloc.logicalBlockNum); | |
cb00ea35 | 1681 | if (epos->offset + adsize > inode->i_sb->s_blocksize) { |
ff116fc8 | 1682 | loffset = epos->offset; |
1da177e4 LT |
1683 | aed->lengthAllocDescs = cpu_to_le32(adsize); |
1684 | sptr = ptr - adsize; | |
1685 | dptr = nbh->b_data + sizeof(struct allocExtDesc); | |
1686 | memcpy(dptr, sptr, adsize); | |
ff116fc8 | 1687 | epos->offset = sizeof(struct allocExtDesc) + adsize; |
cb00ea35 | 1688 | } else { |
ff116fc8 | 1689 | loffset = epos->offset + adsize; |
1da177e4 LT |
1690 | aed->lengthAllocDescs = cpu_to_le32(0); |
1691 | sptr = ptr; | |
ff116fc8 | 1692 | epos->offset = sizeof(struct allocExtDesc); |
1da177e4 | 1693 | |
cb00ea35 | 1694 | if (epos->bh) { |
ff116fc8 | 1695 | aed = (struct allocExtDesc *)epos->bh->b_data; |
c2104fda | 1696 | le32_add_cpu(&aed->lengthAllocDescs, adsize); |
cb00ea35 | 1697 | } else { |
48d6d8ff | 1698 | iinfo->i_lenAlloc += adsize; |
1da177e4 LT |
1699 | mark_inode_dirty(inode); |
1700 | } | |
1701 | } | |
6c79e987 | 1702 | if (UDF_SB(inode->i_sb)->s_udfrev >= 0x0200) |
1da177e4 | 1703 | udf_new_tag(nbh->b_data, TAG_IDENT_AED, 3, 1, |
cb00ea35 | 1704 | epos->block.logicalBlockNum, sizeof(tag)); |
1da177e4 LT |
1705 | else |
1706 | udf_new_tag(nbh->b_data, TAG_IDENT_AED, 2, 1, | |
cb00ea35 | 1707 | epos->block.logicalBlockNum, sizeof(tag)); |
48d6d8ff | 1708 | switch (iinfo->i_alloc_type) { |
cb00ea35 | 1709 | case ICBTAG_FLAG_AD_SHORT: |
28de7948 CG |
1710 | sad = (short_ad *)sptr; |
1711 | sad->extLength = cpu_to_le32(EXT_NEXT_EXTENT_ALLOCDECS | | |
1712 | inode->i_sb->s_blocksize); | |
4b11111a MS |
1713 | sad->extPosition = |
1714 | cpu_to_le32(epos->block.logicalBlockNum); | |
28de7948 | 1715 | break; |
cb00ea35 | 1716 | case ICBTAG_FLAG_AD_LONG: |
28de7948 CG |
1717 | lad = (long_ad *)sptr; |
1718 | lad->extLength = cpu_to_le32(EXT_NEXT_EXTENT_ALLOCDECS | | |
1719 | inode->i_sb->s_blocksize); | |
1720 | lad->extLocation = cpu_to_lelb(epos->block); | |
1721 | memset(lad->impUse, 0x00, sizeof(lad->impUse)); | |
1722 | break; | |
1da177e4 | 1723 | } |
cb00ea35 | 1724 | if (epos->bh) { |
28de7948 | 1725 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
6c79e987 | 1726 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) |
ff116fc8 | 1727 | udf_update_tag(epos->bh->b_data, loffset); |
1da177e4 | 1728 | else |
4b11111a MS |
1729 | udf_update_tag(epos->bh->b_data, |
1730 | sizeof(struct allocExtDesc)); | |
ff116fc8 | 1731 | mark_buffer_dirty_inode(epos->bh, inode); |
3bf25cb4 | 1732 | brelse(epos->bh); |
28de7948 | 1733 | } else { |
1da177e4 | 1734 | mark_inode_dirty(inode); |
28de7948 | 1735 | } |
ff116fc8 | 1736 | epos->bh = nbh; |
1da177e4 LT |
1737 | } |
1738 | ||
ff116fc8 | 1739 | etype = udf_write_aext(inode, epos, eloc, elen, inc); |
1da177e4 | 1740 | |
cb00ea35 | 1741 | if (!epos->bh) { |
48d6d8ff | 1742 | iinfo->i_lenAlloc += adsize; |
1da177e4 | 1743 | mark_inode_dirty(inode); |
cb00ea35 | 1744 | } else { |
ff116fc8 | 1745 | aed = (struct allocExtDesc *)epos->bh->b_data; |
c2104fda | 1746 | le32_add_cpu(&aed->lengthAllocDescs, adsize); |
4b11111a MS |
1747 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
1748 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) | |
1749 | udf_update_tag(epos->bh->b_data, | |
1750 | epos->offset + (inc ? 0 : adsize)); | |
1da177e4 | 1751 | else |
4b11111a MS |
1752 | udf_update_tag(epos->bh->b_data, |
1753 | sizeof(struct allocExtDesc)); | |
ff116fc8 | 1754 | mark_buffer_dirty_inode(epos->bh, inode); |
1da177e4 LT |
1755 | } |
1756 | ||
1757 | return etype; | |
1758 | } | |
1759 | ||
4b11111a | 1760 | int8_t udf_write_aext(struct inode *inode, struct extent_position *epos, |
cb00ea35 | 1761 | kernel_lb_addr eloc, uint32_t elen, int inc) |
1da177e4 LT |
1762 | { |
1763 | int adsize; | |
1764 | uint8_t *ptr; | |
28de7948 CG |
1765 | short_ad *sad; |
1766 | long_ad *lad; | |
48d6d8ff | 1767 | struct udf_inode_info *iinfo = UDF_I(inode); |
1da177e4 | 1768 | |
ff116fc8 | 1769 | if (!epos->bh) |
48d6d8ff | 1770 | ptr = iinfo->i_ext.i_data + epos->offset - |
4b11111a | 1771 | udf_file_entry_alloc_offset(inode) + |
48d6d8ff | 1772 | iinfo->i_lenEAttr; |
1da177e4 | 1773 | else |
ff116fc8 | 1774 | ptr = epos->bh->b_data + epos->offset; |
1da177e4 | 1775 | |
48d6d8ff | 1776 | switch (iinfo->i_alloc_type) { |
cb00ea35 | 1777 | case ICBTAG_FLAG_AD_SHORT: |
28de7948 CG |
1778 | sad = (short_ad *)ptr; |
1779 | sad->extLength = cpu_to_le32(elen); | |
1780 | sad->extPosition = cpu_to_le32(eloc.logicalBlockNum); | |
1781 | adsize = sizeof(short_ad); | |
1782 | break; | |
cb00ea35 | 1783 | case ICBTAG_FLAG_AD_LONG: |
28de7948 CG |
1784 | lad = (long_ad *)ptr; |
1785 | lad->extLength = cpu_to_le32(elen); | |
1786 | lad->extLocation = cpu_to_lelb(eloc); | |
1787 | memset(lad->impUse, 0x00, sizeof(lad->impUse)); | |
1788 | adsize = sizeof(long_ad); | |
1789 | break; | |
cb00ea35 CG |
1790 | default: |
1791 | return -1; | |
1da177e4 LT |
1792 | } |
1793 | ||
cb00ea35 | 1794 | if (epos->bh) { |
28de7948 | 1795 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
6c79e987 | 1796 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) { |
4b11111a MS |
1797 | struct allocExtDesc *aed = |
1798 | (struct allocExtDesc *)epos->bh->b_data; | |
ff116fc8 | 1799 | udf_update_tag(epos->bh->b_data, |
4b11111a MS |
1800 | le32_to_cpu(aed->lengthAllocDescs) + |
1801 | sizeof(struct allocExtDesc)); | |
1da177e4 | 1802 | } |
ff116fc8 | 1803 | mark_buffer_dirty_inode(epos->bh, inode); |
28de7948 | 1804 | } else { |
1da177e4 | 1805 | mark_inode_dirty(inode); |
28de7948 | 1806 | } |
1da177e4 LT |
1807 | |
1808 | if (inc) | |
ff116fc8 | 1809 | epos->offset += adsize; |
28de7948 | 1810 | |
1da177e4 LT |
1811 | return (elen >> 30); |
1812 | } | |
1813 | ||
4b11111a MS |
1814 | int8_t udf_next_aext(struct inode *inode, struct extent_position *epos, |
1815 | kernel_lb_addr *eloc, uint32_t *elen, int inc) | |
1da177e4 LT |
1816 | { |
1817 | int8_t etype; | |
1818 | ||
ff116fc8 | 1819 | while ((etype = udf_current_aext(inode, epos, eloc, elen, inc)) == |
cb00ea35 | 1820 | (EXT_NEXT_EXTENT_ALLOCDECS >> 30)) { |
4b11111a | 1821 | int block; |
ff116fc8 JK |
1822 | epos->block = *eloc; |
1823 | epos->offset = sizeof(struct allocExtDesc); | |
3bf25cb4 | 1824 | brelse(epos->bh); |
4b11111a MS |
1825 | block = udf_get_lb_pblock(inode->i_sb, epos->block, 0); |
1826 | epos->bh = udf_tread(inode->i_sb, block); | |
1827 | if (!epos->bh) { | |
1828 | udf_debug("reading block %d failed!\n", block); | |
1da177e4 LT |
1829 | return -1; |
1830 | } | |
1831 | } | |
1832 | ||
1833 | return etype; | |
1834 | } | |
1835 | ||
4b11111a MS |
1836 | int8_t udf_current_aext(struct inode *inode, struct extent_position *epos, |
1837 | kernel_lb_addr *eloc, uint32_t *elen, int inc) | |
1da177e4 LT |
1838 | { |
1839 | int alen; | |
1840 | int8_t etype; | |
1841 | uint8_t *ptr; | |
28de7948 CG |
1842 | short_ad *sad; |
1843 | long_ad *lad; | |
48d6d8ff | 1844 | struct udf_inode_info *iinfo = UDF_I(inode); |
28de7948 | 1845 | |
cb00ea35 | 1846 | if (!epos->bh) { |
ff116fc8 JK |
1847 | if (!epos->offset) |
1848 | epos->offset = udf_file_entry_alloc_offset(inode); | |
48d6d8ff | 1849 | ptr = iinfo->i_ext.i_data + epos->offset - |
4b11111a | 1850 | udf_file_entry_alloc_offset(inode) + |
48d6d8ff | 1851 | iinfo->i_lenEAttr; |
4b11111a | 1852 | alen = udf_file_entry_alloc_offset(inode) + |
48d6d8ff | 1853 | iinfo->i_lenAlloc; |
cb00ea35 | 1854 | } else { |
ff116fc8 JK |
1855 | if (!epos->offset) |
1856 | epos->offset = sizeof(struct allocExtDesc); | |
1857 | ptr = epos->bh->b_data + epos->offset; | |
28de7948 | 1858 | alen = sizeof(struct allocExtDesc) + |
4b11111a MS |
1859 | le32_to_cpu(((struct allocExtDesc *)epos->bh->b_data)-> |
1860 | lengthAllocDescs); | |
1da177e4 LT |
1861 | } |
1862 | ||
48d6d8ff | 1863 | switch (iinfo->i_alloc_type) { |
cb00ea35 | 1864 | case ICBTAG_FLAG_AD_SHORT: |
4b11111a MS |
1865 | sad = udf_get_fileshortad(ptr, alen, &epos->offset, inc); |
1866 | if (!sad) | |
28de7948 CG |
1867 | return -1; |
1868 | etype = le32_to_cpu(sad->extLength) >> 30; | |
1869 | eloc->logicalBlockNum = le32_to_cpu(sad->extPosition); | |
4b11111a | 1870 | eloc->partitionReferenceNum = |
48d6d8ff | 1871 | iinfo->i_location.partitionReferenceNum; |
28de7948 CG |
1872 | *elen = le32_to_cpu(sad->extLength) & UDF_EXTENT_LENGTH_MASK; |
1873 | break; | |
cb00ea35 | 1874 | case ICBTAG_FLAG_AD_LONG: |
4b11111a MS |
1875 | lad = udf_get_filelongad(ptr, alen, &epos->offset, inc); |
1876 | if (!lad) | |
1da177e4 | 1877 | return -1; |
28de7948 CG |
1878 | etype = le32_to_cpu(lad->extLength) >> 30; |
1879 | *eloc = lelb_to_cpu(lad->extLocation); | |
1880 | *elen = le32_to_cpu(lad->extLength) & UDF_EXTENT_LENGTH_MASK; | |
1881 | break; | |
1882 | default: | |
4b11111a | 1883 | udf_debug("alloc_type = %d unsupported\n", |
48d6d8ff | 1884 | iinfo->i_alloc_type); |
28de7948 | 1885 | return -1; |
1da177e4 LT |
1886 | } |
1887 | ||
1888 | return etype; | |
1889 | } | |
1890 | ||
28de7948 CG |
1891 | static int8_t udf_insert_aext(struct inode *inode, struct extent_position epos, |
1892 | kernel_lb_addr neloc, uint32_t nelen) | |
1da177e4 LT |
1893 | { |
1894 | kernel_lb_addr oeloc; | |
1895 | uint32_t oelen; | |
1896 | int8_t etype; | |
1897 | ||
ff116fc8 | 1898 | if (epos.bh) |
3bf25cb4 | 1899 | get_bh(epos.bh); |
1da177e4 | 1900 | |
cb00ea35 | 1901 | while ((etype = udf_next_aext(inode, &epos, &oeloc, &oelen, 0)) != -1) { |
ff116fc8 | 1902 | udf_write_aext(inode, &epos, neloc, nelen, 1); |
1da177e4 LT |
1903 | neloc = oeloc; |
1904 | nelen = (etype << 30) | oelen; | |
1905 | } | |
ff116fc8 | 1906 | udf_add_aext(inode, &epos, neloc, nelen, 1); |
3bf25cb4 | 1907 | brelse(epos.bh); |
28de7948 | 1908 | |
1da177e4 LT |
1909 | return (nelen >> 30); |
1910 | } | |
1911 | ||
4b11111a | 1912 | int8_t udf_delete_aext(struct inode *inode, struct extent_position epos, |
cb00ea35 | 1913 | kernel_lb_addr eloc, uint32_t elen) |
1da177e4 | 1914 | { |
ff116fc8 JK |
1915 | struct extent_position oepos; |
1916 | int adsize; | |
1da177e4 LT |
1917 | int8_t etype; |
1918 | struct allocExtDesc *aed; | |
48d6d8ff | 1919 | struct udf_inode_info *iinfo; |
1da177e4 | 1920 | |
cb00ea35 | 1921 | if (epos.bh) { |
3bf25cb4 JK |
1922 | get_bh(epos.bh); |
1923 | get_bh(epos.bh); | |
1da177e4 LT |
1924 | } |
1925 | ||
48d6d8ff MS |
1926 | iinfo = UDF_I(inode); |
1927 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) | |
1da177e4 | 1928 | adsize = sizeof(short_ad); |
48d6d8ff | 1929 | else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
1da177e4 LT |
1930 | adsize = sizeof(long_ad); |
1931 | else | |
1932 | adsize = 0; | |
1933 | ||
ff116fc8 JK |
1934 | oepos = epos; |
1935 | if (udf_next_aext(inode, &epos, &eloc, &elen, 1) == -1) | |
1da177e4 LT |
1936 | return -1; |
1937 | ||
cb00ea35 | 1938 | while ((etype = udf_next_aext(inode, &epos, &eloc, &elen, 1)) != -1) { |
ff116fc8 | 1939 | udf_write_aext(inode, &oepos, eloc, (etype << 30) | elen, 1); |
cb00ea35 | 1940 | if (oepos.bh != epos.bh) { |
ff116fc8 | 1941 | oepos.block = epos.block; |
3bf25cb4 JK |
1942 | brelse(oepos.bh); |
1943 | get_bh(epos.bh); | |
ff116fc8 JK |
1944 | oepos.bh = epos.bh; |
1945 | oepos.offset = epos.offset - adsize; | |
1da177e4 LT |
1946 | } |
1947 | } | |
1948 | memset(&eloc, 0x00, sizeof(kernel_lb_addr)); | |
1949 | elen = 0; | |
1950 | ||
cb00ea35 | 1951 | if (epos.bh != oepos.bh) { |
ff116fc8 JK |
1952 | udf_free_blocks(inode->i_sb, inode, epos.block, 0, 1); |
1953 | udf_write_aext(inode, &oepos, eloc, elen, 1); | |
1954 | udf_write_aext(inode, &oepos, eloc, elen, 1); | |
cb00ea35 | 1955 | if (!oepos.bh) { |
48d6d8ff | 1956 | iinfo->i_lenAlloc -= (adsize * 2); |
1da177e4 | 1957 | mark_inode_dirty(inode); |
cb00ea35 | 1958 | } else { |
ff116fc8 | 1959 | aed = (struct allocExtDesc *)oepos.bh->b_data; |
c2104fda | 1960 | le32_add_cpu(&aed->lengthAllocDescs, -(2 * adsize)); |
28de7948 | 1961 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
6c79e987 | 1962 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) |
4b11111a MS |
1963 | udf_update_tag(oepos.bh->b_data, |
1964 | oepos.offset - (2 * adsize)); | |
1da177e4 | 1965 | else |
4b11111a MS |
1966 | udf_update_tag(oepos.bh->b_data, |
1967 | sizeof(struct allocExtDesc)); | |
ff116fc8 | 1968 | mark_buffer_dirty_inode(oepos.bh, inode); |
1da177e4 | 1969 | } |
cb00ea35 | 1970 | } else { |
ff116fc8 | 1971 | udf_write_aext(inode, &oepos, eloc, elen, 1); |
cb00ea35 | 1972 | if (!oepos.bh) { |
48d6d8ff | 1973 | iinfo->i_lenAlloc -= adsize; |
1da177e4 | 1974 | mark_inode_dirty(inode); |
cb00ea35 | 1975 | } else { |
ff116fc8 | 1976 | aed = (struct allocExtDesc *)oepos.bh->b_data; |
c2104fda | 1977 | le32_add_cpu(&aed->lengthAllocDescs, -adsize); |
28de7948 | 1978 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
6c79e987 | 1979 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) |
4b11111a MS |
1980 | udf_update_tag(oepos.bh->b_data, |
1981 | epos.offset - adsize); | |
1da177e4 | 1982 | else |
4b11111a MS |
1983 | udf_update_tag(oepos.bh->b_data, |
1984 | sizeof(struct allocExtDesc)); | |
ff116fc8 | 1985 | mark_buffer_dirty_inode(oepos.bh, inode); |
1da177e4 LT |
1986 | } |
1987 | } | |
647bd61a | 1988 | |
3bf25cb4 JK |
1989 | brelse(epos.bh); |
1990 | brelse(oepos.bh); | |
28de7948 | 1991 | |
1da177e4 LT |
1992 | return (elen >> 30); |
1993 | } | |
1994 | ||
4b11111a MS |
1995 | int8_t inode_bmap(struct inode *inode, sector_t block, |
1996 | struct extent_position *pos, kernel_lb_addr *eloc, | |
1997 | uint32_t *elen, sector_t *offset) | |
1da177e4 | 1998 | { |
4b11111a | 1999 | unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; |
cb00ea35 | 2000 | loff_t lbcount = 0, bcount = |
4b11111a | 2001 | (loff_t) block << blocksize_bits; |
1da177e4 | 2002 | int8_t etype; |
48d6d8ff | 2003 | struct udf_inode_info *iinfo; |
1da177e4 | 2004 | |
48d6d8ff | 2005 | iinfo = UDF_I(inode); |
ff116fc8 | 2006 | pos->offset = 0; |
48d6d8ff | 2007 | pos->block = iinfo->i_location; |
ff116fc8 | 2008 | pos->bh = NULL; |
1da177e4 | 2009 | *elen = 0; |
1da177e4 | 2010 | |
cb00ea35 | 2011 | do { |
4b11111a MS |
2012 | etype = udf_next_aext(inode, pos, eloc, elen, 1); |
2013 | if (etype == -1) { | |
2014 | *offset = (bcount - lbcount) >> blocksize_bits; | |
48d6d8ff | 2015 | iinfo->i_lenExtents = lbcount; |
1da177e4 LT |
2016 | return -1; |
2017 | } | |
2018 | lbcount += *elen; | |
2019 | } while (lbcount <= bcount); | |
2020 | ||
4b11111a | 2021 | *offset = (bcount + *elen - lbcount) >> blocksize_bits; |
1da177e4 LT |
2022 | |
2023 | return etype; | |
2024 | } | |
2025 | ||
60448b1d | 2026 | long udf_block_map(struct inode *inode, sector_t block) |
1da177e4 | 2027 | { |
ff116fc8 JK |
2028 | kernel_lb_addr eloc; |
2029 | uint32_t elen; | |
60448b1d | 2030 | sector_t offset; |
28de7948 | 2031 | struct extent_position epos = {}; |
1da177e4 LT |
2032 | int ret; |
2033 | ||
2034 | lock_kernel(); | |
2035 | ||
4b11111a MS |
2036 | if (inode_bmap(inode, block, &epos, &eloc, &elen, &offset) == |
2037 | (EXT_RECORDED_ALLOCATED >> 30)) | |
60448b1d | 2038 | ret = udf_get_lb_pblock(inode->i_sb, eloc, offset); |
1da177e4 LT |
2039 | else |
2040 | ret = 0; | |
2041 | ||
2042 | unlock_kernel(); | |
3bf25cb4 | 2043 | brelse(epos.bh); |
1da177e4 LT |
2044 | |
2045 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_VARCONV)) | |
2046 | return udf_fixed_to_variable(ret); | |
2047 | else | |
2048 | return ret; | |
2049 | } |