]>
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> | |
f845fced | 40 | #include <linux/crc-itu-t.h> |
1da177e4 LT |
41 | |
42 | #include "udf_i.h" | |
43 | #include "udf_sb.h" | |
44 | ||
45 | MODULE_AUTHOR("Ben Fennema"); | |
46 | MODULE_DESCRIPTION("Universal Disk Format Filesystem"); | |
47 | MODULE_LICENSE("GPL"); | |
48 | ||
49 | #define EXTENT_MERGE_SIZE 5 | |
50 | ||
51 | static mode_t udf_convert_permissions(struct fileEntry *); | |
52 | static int udf_update_inode(struct inode *, int); | |
53 | static void udf_fill_inode(struct inode *, struct buffer_head *); | |
647bd61a | 54 | static int udf_alloc_i_data(struct inode *inode, size_t size); |
60448b1d | 55 | static struct buffer_head *inode_getblk(struct inode *, sector_t, int *, |
1ed16171 | 56 | sector_t *, int *); |
ff116fc8 | 57 | static int8_t udf_insert_aext(struct inode *, struct extent_position, |
cb00ea35 | 58 | kernel_lb_addr, uint32_t); |
1da177e4 | 59 | static void udf_split_extents(struct inode *, int *, int, int, |
cb00ea35 | 60 | kernel_long_ad[EXTENT_MERGE_SIZE], int *); |
1da177e4 | 61 | static void udf_prealloc_extents(struct inode *, int, int, |
cb00ea35 | 62 | kernel_long_ad[EXTENT_MERGE_SIZE], int *); |
1da177e4 | 63 | static void udf_merge_extents(struct inode *, |
cb00ea35 | 64 | kernel_long_ad[EXTENT_MERGE_SIZE], int *); |
1da177e4 | 65 | static void udf_update_extents(struct inode *, |
cb00ea35 CG |
66 | kernel_long_ad[EXTENT_MERGE_SIZE], int, int, |
67 | struct extent_position *); | |
1da177e4 LT |
68 | static int udf_get_block(struct inode *, sector_t, struct buffer_head *, int); |
69 | ||
b1e32126 | 70 | |
cb00ea35 | 71 | void udf_delete_inode(struct inode *inode) |
1da177e4 | 72 | { |
fef26658 MF |
73 | truncate_inode_pages(&inode->i_data, 0); |
74 | ||
1da177e4 LT |
75 | if (is_bad_inode(inode)) |
76 | goto no_delete; | |
77 | ||
78 | inode->i_size = 0; | |
79 | udf_truncate(inode); | |
80 | lock_kernel(); | |
81 | ||
82 | udf_update_inode(inode, IS_SYNC(inode)); | |
83 | udf_free_inode(inode); | |
84 | ||
85 | unlock_kernel(); | |
86 | return; | |
28de7948 CG |
87 | |
88 | no_delete: | |
1da177e4 LT |
89 | clear_inode(inode); |
90 | } | |
91 | ||
74584ae5 JK |
92 | /* |
93 | * If we are going to release inode from memory, we discard preallocation and | |
94 | * truncate last inode extent to proper length. We could use drop_inode() but | |
95 | * it's called under inode_lock and thus we cannot mark inode dirty there. We | |
96 | * use clear_inode() but we have to make sure to write inode as it's not written | |
97 | * automatically. | |
98 | */ | |
1da177e4 LT |
99 | void udf_clear_inode(struct inode *inode) |
100 | { | |
48d6d8ff | 101 | struct udf_inode_info *iinfo; |
1da177e4 LT |
102 | if (!(inode->i_sb->s_flags & MS_RDONLY)) { |
103 | lock_kernel(); | |
74584ae5 | 104 | /* Discard preallocation for directories, symlinks, etc. */ |
1da177e4 | 105 | udf_discard_prealloc(inode); |
74584ae5 | 106 | udf_truncate_tail_extent(inode); |
1da177e4 | 107 | unlock_kernel(); |
32a8f24d | 108 | write_inode_now(inode, 0); |
52b19ac9 | 109 | invalidate_inode_buffers(inode); |
1da177e4 | 110 | } |
48d6d8ff MS |
111 | iinfo = UDF_I(inode); |
112 | kfree(iinfo->i_ext.i_data); | |
113 | iinfo->i_ext.i_data = NULL; | |
1da177e4 LT |
114 | } |
115 | ||
116 | static int udf_writepage(struct page *page, struct writeback_control *wbc) | |
117 | { | |
118 | return block_write_full_page(page, udf_get_block, wbc); | |
119 | } | |
120 | ||
121 | static int udf_readpage(struct file *file, struct page *page) | |
122 | { | |
123 | return block_read_full_page(page, udf_get_block); | |
124 | } | |
125 | ||
be021ee4 NP |
126 | static int udf_write_begin(struct file *file, struct address_space *mapping, |
127 | loff_t pos, unsigned len, unsigned flags, | |
128 | struct page **pagep, void **fsdata) | |
1da177e4 | 129 | { |
be021ee4 NP |
130 | *pagep = NULL; |
131 | return block_write_begin(file, mapping, pos, len, flags, pagep, fsdata, | |
132 | udf_get_block); | |
1da177e4 LT |
133 | } |
134 | ||
135 | static sector_t udf_bmap(struct address_space *mapping, sector_t block) | |
136 | { | |
cb00ea35 | 137 | return generic_block_bmap(mapping, block, udf_get_block); |
1da177e4 LT |
138 | } |
139 | ||
f5e54d6e | 140 | const struct address_space_operations udf_aops = { |
28de7948 CG |
141 | .readpage = udf_readpage, |
142 | .writepage = udf_writepage, | |
143 | .sync_page = block_sync_page, | |
be021ee4 NP |
144 | .write_begin = udf_write_begin, |
145 | .write_end = generic_write_end, | |
28de7948 | 146 | .bmap = udf_bmap, |
1da177e4 LT |
147 | }; |
148 | ||
cb00ea35 | 149 | void udf_expand_file_adinicb(struct inode *inode, int newsize, int *err) |
1da177e4 LT |
150 | { |
151 | struct page *page; | |
152 | char *kaddr; | |
48d6d8ff | 153 | struct udf_inode_info *iinfo = UDF_I(inode); |
1da177e4 LT |
154 | struct writeback_control udf_wbc = { |
155 | .sync_mode = WB_SYNC_NONE, | |
156 | .nr_to_write = 1, | |
157 | }; | |
158 | ||
159 | /* from now on we have normal address_space methods */ | |
160 | inode->i_data.a_ops = &udf_aops; | |
161 | ||
48d6d8ff | 162 | if (!iinfo->i_lenAlloc) { |
1da177e4 | 163 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) |
48d6d8ff | 164 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT; |
1da177e4 | 165 | else |
48d6d8ff | 166 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG; |
1da177e4 LT |
167 | mark_inode_dirty(inode); |
168 | return; | |
169 | } | |
170 | ||
171 | page = grab_cache_page(inode->i_mapping, 0); | |
cd7619d6 MM |
172 | BUG_ON(!PageLocked(page)); |
173 | ||
cb00ea35 | 174 | if (!PageUptodate(page)) { |
1da177e4 | 175 | kaddr = kmap(page); |
48d6d8ff MS |
176 | memset(kaddr + iinfo->i_lenAlloc, 0x00, |
177 | PAGE_CACHE_SIZE - iinfo->i_lenAlloc); | |
178 | memcpy(kaddr, iinfo->i_ext.i_data + iinfo->i_lenEAttr, | |
179 | iinfo->i_lenAlloc); | |
1da177e4 LT |
180 | flush_dcache_page(page); |
181 | SetPageUptodate(page); | |
182 | kunmap(page); | |
183 | } | |
48d6d8ff MS |
184 | memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr, 0x00, |
185 | iinfo->i_lenAlloc); | |
186 | iinfo->i_lenAlloc = 0; | |
1da177e4 | 187 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) |
48d6d8ff | 188 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT; |
1da177e4 | 189 | else |
48d6d8ff | 190 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG; |
1da177e4 LT |
191 | |
192 | inode->i_data.a_ops->writepage(page, &udf_wbc); | |
193 | page_cache_release(page); | |
194 | ||
195 | mark_inode_dirty(inode); | |
196 | } | |
197 | ||
cb00ea35 CG |
198 | struct buffer_head *udf_expand_dir_adinicb(struct inode *inode, int *block, |
199 | int *err) | |
1da177e4 LT |
200 | { |
201 | int newblock; | |
ff116fc8 JK |
202 | struct buffer_head *dbh = NULL; |
203 | kernel_lb_addr eloc; | |
204 | uint32_t elen; | |
1da177e4 | 205 | uint8_t alloctype; |
ff116fc8 | 206 | struct extent_position epos; |
1da177e4 LT |
207 | |
208 | struct udf_fileident_bh sfibh, dfibh; | |
af793295 JK |
209 | loff_t f_pos = udf_ext0_offset(inode); |
210 | int size = udf_ext0_offset(inode) + inode->i_size; | |
1da177e4 | 211 | struct fileIdentDesc cfi, *sfi, *dfi; |
48d6d8ff | 212 | struct udf_inode_info *iinfo = UDF_I(inode); |
1da177e4 LT |
213 | |
214 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) | |
215 | alloctype = ICBTAG_FLAG_AD_SHORT; | |
216 | else | |
217 | alloctype = ICBTAG_FLAG_AD_LONG; | |
218 | ||
cb00ea35 | 219 | if (!inode->i_size) { |
48d6d8ff | 220 | iinfo->i_alloc_type = alloctype; |
1da177e4 LT |
221 | mark_inode_dirty(inode); |
222 | return NULL; | |
223 | } | |
224 | ||
225 | /* alloc block, and copy data to it */ | |
226 | *block = udf_new_block(inode->i_sb, inode, | |
48d6d8ff MS |
227 | iinfo->i_location.partitionReferenceNum, |
228 | iinfo->i_location.logicalBlockNum, err); | |
1da177e4 LT |
229 | if (!(*block)) |
230 | return NULL; | |
231 | newblock = udf_get_pblock(inode->i_sb, *block, | |
48d6d8ff | 232 | iinfo->i_location.partitionReferenceNum, |
c0b34438 | 233 | 0); |
1da177e4 LT |
234 | if (!newblock) |
235 | return NULL; | |
236 | dbh = udf_tgetblk(inode->i_sb, newblock); | |
237 | if (!dbh) | |
238 | return NULL; | |
239 | lock_buffer(dbh); | |
240 | memset(dbh->b_data, 0x00, inode->i_sb->s_blocksize); | |
241 | set_buffer_uptodate(dbh); | |
242 | unlock_buffer(dbh); | |
243 | mark_buffer_dirty_inode(dbh, inode); | |
244 | ||
4b11111a | 245 | sfibh.soffset = sfibh.eoffset = |
af793295 | 246 | f_pos & (inode->i_sb->s_blocksize - 1); |
ff116fc8 | 247 | sfibh.sbh = sfibh.ebh = NULL; |
1da177e4 LT |
248 | dfibh.soffset = dfibh.eoffset = 0; |
249 | dfibh.sbh = dfibh.ebh = dbh; | |
af793295 | 250 | while (f_pos < size) { |
48d6d8ff | 251 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB; |
4b11111a MS |
252 | sfi = udf_fileident_read(inode, &f_pos, &sfibh, &cfi, NULL, |
253 | NULL, NULL, NULL); | |
cb00ea35 | 254 | if (!sfi) { |
3bf25cb4 | 255 | brelse(dbh); |
1da177e4 LT |
256 | return NULL; |
257 | } | |
48d6d8ff | 258 | iinfo->i_alloc_type = alloctype; |
1da177e4 LT |
259 | sfi->descTag.tagLocation = cpu_to_le32(*block); |
260 | dfibh.soffset = dfibh.eoffset; | |
261 | dfibh.eoffset += (sfibh.eoffset - sfibh.soffset); | |
262 | dfi = (struct fileIdentDesc *)(dbh->b_data + dfibh.soffset); | |
263 | if (udf_write_fi(inode, sfi, dfi, &dfibh, sfi->impUse, | |
4b11111a MS |
264 | sfi->fileIdent + |
265 | le16_to_cpu(sfi->lengthOfImpUse))) { | |
48d6d8ff | 266 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB; |
3bf25cb4 | 267 | brelse(dbh); |
1da177e4 LT |
268 | return NULL; |
269 | } | |
270 | } | |
271 | mark_buffer_dirty_inode(dbh, inode); | |
272 | ||
48d6d8ff MS |
273 | memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr, 0, |
274 | iinfo->i_lenAlloc); | |
275 | iinfo->i_lenAlloc = 0; | |
1da177e4 | 276 | eloc.logicalBlockNum = *block; |
4b11111a | 277 | eloc.partitionReferenceNum = |
48d6d8ff | 278 | iinfo->i_location.partitionReferenceNum; |
05343c4f | 279 | elen = inode->i_sb->s_blocksize; |
48d6d8ff | 280 | iinfo->i_lenExtents = elen; |
ff116fc8 | 281 | epos.bh = NULL; |
48d6d8ff | 282 | epos.block = iinfo->i_location; |
ff116fc8 JK |
283 | epos.offset = udf_file_entry_alloc_offset(inode); |
284 | udf_add_aext(inode, &epos, eloc, elen, 0); | |
1da177e4 LT |
285 | /* UniqueID stuff */ |
286 | ||
3bf25cb4 | 287 | brelse(epos.bh); |
1da177e4 LT |
288 | mark_inode_dirty(inode); |
289 | return dbh; | |
290 | } | |
291 | ||
cb00ea35 CG |
292 | static int udf_get_block(struct inode *inode, sector_t block, |
293 | struct buffer_head *bh_result, int create) | |
1da177e4 LT |
294 | { |
295 | int err, new; | |
296 | struct buffer_head *bh; | |
1ed16171 | 297 | sector_t phys = 0; |
48d6d8ff | 298 | struct udf_inode_info *iinfo; |
1da177e4 | 299 | |
cb00ea35 | 300 | if (!create) { |
1da177e4 LT |
301 | phys = udf_block_map(inode, block); |
302 | if (phys) | |
303 | map_bh(bh_result, inode->i_sb, phys); | |
304 | return 0; | |
305 | } | |
306 | ||
307 | err = -EIO; | |
308 | new = 0; | |
309 | bh = NULL; | |
310 | ||
311 | lock_kernel(); | |
312 | ||
48d6d8ff MS |
313 | iinfo = UDF_I(inode); |
314 | if (block == iinfo->i_next_alloc_block + 1) { | |
315 | iinfo->i_next_alloc_block++; | |
316 | iinfo->i_next_alloc_goal++; | |
1da177e4 LT |
317 | } |
318 | ||
319 | err = 0; | |
320 | ||
321 | bh = inode_getblk(inode, block, &err, &phys, &new); | |
2c2111c2 | 322 | BUG_ON(bh); |
1da177e4 LT |
323 | if (err) |
324 | goto abort; | |
2c2111c2 | 325 | BUG_ON(!phys); |
1da177e4 LT |
326 | |
327 | if (new) | |
328 | set_buffer_new(bh_result); | |
329 | map_bh(bh_result, inode->i_sb, phys); | |
28de7948 CG |
330 | |
331 | abort: | |
1da177e4 LT |
332 | unlock_kernel(); |
333 | return err; | |
1da177e4 LT |
334 | } |
335 | ||
cb00ea35 CG |
336 | static struct buffer_head *udf_getblk(struct inode *inode, long block, |
337 | int create, int *err) | |
1da177e4 | 338 | { |
28de7948 | 339 | struct buffer_head *bh; |
1da177e4 LT |
340 | struct buffer_head dummy; |
341 | ||
342 | dummy.b_state = 0; | |
343 | dummy.b_blocknr = -1000; | |
344 | *err = udf_get_block(inode, block, &dummy, create); | |
cb00ea35 | 345 | if (!*err && buffer_mapped(&dummy)) { |
1da177e4 | 346 | bh = sb_getblk(inode->i_sb, dummy.b_blocknr); |
cb00ea35 | 347 | if (buffer_new(&dummy)) { |
1da177e4 LT |
348 | lock_buffer(bh); |
349 | memset(bh->b_data, 0x00, inode->i_sb->s_blocksize); | |
350 | set_buffer_uptodate(bh); | |
351 | unlock_buffer(bh); | |
352 | mark_buffer_dirty_inode(bh, inode); | |
353 | } | |
354 | return bh; | |
355 | } | |
28de7948 | 356 | |
1da177e4 LT |
357 | return NULL; |
358 | } | |
359 | ||
31170b6a JK |
360 | /* Extend the file by 'blocks' blocks, return the number of extents added */ |
361 | int udf_extend_file(struct inode *inode, struct extent_position *last_pos, | |
4b11111a | 362 | kernel_long_ad *last_ext, sector_t blocks) |
31170b6a JK |
363 | { |
364 | sector_t add; | |
365 | int count = 0, fake = !(last_ext->extLength & UDF_EXTENT_LENGTH_MASK); | |
366 | struct super_block *sb = inode->i_sb; | |
28de7948 | 367 | kernel_lb_addr prealloc_loc = {}; |
31170b6a | 368 | int prealloc_len = 0; |
48d6d8ff | 369 | struct udf_inode_info *iinfo; |
31170b6a JK |
370 | |
371 | /* The previous extent is fake and we should not extend by anything | |
372 | * - there's nothing to do... */ | |
373 | if (!blocks && fake) | |
374 | return 0; | |
28de7948 | 375 | |
48d6d8ff | 376 | iinfo = UDF_I(inode); |
31170b6a JK |
377 | /* Round the last extent up to a multiple of block size */ |
378 | if (last_ext->extLength & (sb->s_blocksize - 1)) { | |
379 | last_ext->extLength = | |
28de7948 CG |
380 | (last_ext->extLength & UDF_EXTENT_FLAG_MASK) | |
381 | (((last_ext->extLength & UDF_EXTENT_LENGTH_MASK) + | |
382 | sb->s_blocksize - 1) & ~(sb->s_blocksize - 1)); | |
48d6d8ff MS |
383 | iinfo->i_lenExtents = |
384 | (iinfo->i_lenExtents + sb->s_blocksize - 1) & | |
28de7948 | 385 | ~(sb->s_blocksize - 1); |
31170b6a | 386 | } |
28de7948 | 387 | |
31170b6a | 388 | /* Last extent are just preallocated blocks? */ |
4b11111a MS |
389 | if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) == |
390 | EXT_NOT_RECORDED_ALLOCATED) { | |
31170b6a JK |
391 | /* Save the extent so that we can reattach it to the end */ |
392 | prealloc_loc = last_ext->extLocation; | |
393 | prealloc_len = last_ext->extLength; | |
394 | /* Mark the extent as a hole */ | |
395 | last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | | |
28de7948 | 396 | (last_ext->extLength & UDF_EXTENT_LENGTH_MASK); |
31170b6a | 397 | last_ext->extLocation.logicalBlockNum = 0; |
4b11111a | 398 | last_ext->extLocation.partitionReferenceNum = 0; |
31170b6a | 399 | } |
28de7948 | 400 | |
31170b6a | 401 | /* Can we merge with the previous extent? */ |
4b11111a MS |
402 | if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) == |
403 | EXT_NOT_RECORDED_NOT_ALLOCATED) { | |
404 | add = ((1 << 30) - sb->s_blocksize - | |
405 | (last_ext->extLength & UDF_EXTENT_LENGTH_MASK)) >> | |
406 | sb->s_blocksize_bits; | |
31170b6a JK |
407 | if (add > blocks) |
408 | add = blocks; | |
409 | blocks -= add; | |
410 | last_ext->extLength += add << sb->s_blocksize_bits; | |
411 | } | |
412 | ||
413 | if (fake) { | |
414 | udf_add_aext(inode, last_pos, last_ext->extLocation, | |
cb00ea35 | 415 | last_ext->extLength, 1); |
31170b6a | 416 | count++; |
4b11111a MS |
417 | } else |
418 | udf_write_aext(inode, last_pos, last_ext->extLocation, | |
419 | last_ext->extLength, 1); | |
28de7948 | 420 | |
31170b6a JK |
421 | /* Managed to do everything necessary? */ |
422 | if (!blocks) | |
423 | goto out; | |
424 | ||
425 | /* All further extents will be NOT_RECORDED_NOT_ALLOCATED */ | |
426 | last_ext->extLocation.logicalBlockNum = 0; | |
4b11111a | 427 | last_ext->extLocation.partitionReferenceNum = 0; |
28de7948 | 428 | add = (1 << (30-sb->s_blocksize_bits)) - 1; |
4b11111a MS |
429 | last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | |
430 | (add << sb->s_blocksize_bits); | |
28de7948 | 431 | |
31170b6a JK |
432 | /* Create enough extents to cover the whole hole */ |
433 | while (blocks > add) { | |
434 | blocks -= add; | |
435 | if (udf_add_aext(inode, last_pos, last_ext->extLocation, | |
cb00ea35 | 436 | last_ext->extLength, 1) == -1) |
31170b6a JK |
437 | return -1; |
438 | count++; | |
439 | } | |
440 | if (blocks) { | |
441 | last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | | |
28de7948 | 442 | (blocks << sb->s_blocksize_bits); |
31170b6a | 443 | if (udf_add_aext(inode, last_pos, last_ext->extLocation, |
cb00ea35 | 444 | last_ext->extLength, 1) == -1) |
31170b6a JK |
445 | return -1; |
446 | count++; | |
447 | } | |
28de7948 CG |
448 | |
449 | out: | |
31170b6a JK |
450 | /* Do we have some preallocated blocks saved? */ |
451 | if (prealloc_len) { | |
4b11111a MS |
452 | if (udf_add_aext(inode, last_pos, prealloc_loc, |
453 | prealloc_len, 1) == -1) | |
31170b6a JK |
454 | return -1; |
455 | last_ext->extLocation = prealloc_loc; | |
456 | last_ext->extLength = prealloc_len; | |
457 | count++; | |
458 | } | |
28de7948 | 459 | |
31170b6a | 460 | /* last_pos should point to the last written extent... */ |
48d6d8ff | 461 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
31170b6a | 462 | last_pos->offset -= sizeof(short_ad); |
48d6d8ff | 463 | else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
31170b6a JK |
464 | last_pos->offset -= sizeof(long_ad); |
465 | else | |
466 | return -1; | |
28de7948 | 467 | |
31170b6a JK |
468 | return count; |
469 | } | |
470 | ||
cb00ea35 | 471 | static struct buffer_head *inode_getblk(struct inode *inode, sector_t block, |
1ed16171 | 472 | int *err, sector_t *phys, int *new) |
1da177e4 | 473 | { |
31170b6a | 474 | static sector_t last_block; |
ff116fc8 | 475 | struct buffer_head *result = NULL; |
1da177e4 | 476 | kernel_long_ad laarr[EXTENT_MERGE_SIZE]; |
ff116fc8 | 477 | struct extent_position prev_epos, cur_epos, next_epos; |
1da177e4 | 478 | int count = 0, startnum = 0, endnum = 0; |
85d71244 JK |
479 | uint32_t elen = 0, tmpelen; |
480 | kernel_lb_addr eloc, tmpeloc; | |
1da177e4 | 481 | int c = 1; |
60448b1d JK |
482 | loff_t lbcount = 0, b_off = 0; |
483 | uint32_t newblocknum, newblock; | |
484 | sector_t offset = 0; | |
1da177e4 | 485 | int8_t etype; |
48d6d8ff MS |
486 | struct udf_inode_info *iinfo = UDF_I(inode); |
487 | int goal = 0, pgoal = iinfo->i_location.logicalBlockNum; | |
31170b6a | 488 | int lastblock = 0; |
1da177e4 | 489 | |
ff116fc8 | 490 | prev_epos.offset = udf_file_entry_alloc_offset(inode); |
48d6d8ff | 491 | prev_epos.block = iinfo->i_location; |
ff116fc8 JK |
492 | prev_epos.bh = NULL; |
493 | cur_epos = next_epos = prev_epos; | |
28de7948 | 494 | b_off = (loff_t)block << inode->i_sb->s_blocksize_bits; |
1da177e4 LT |
495 | |
496 | /* find the extent which contains the block we are looking for. | |
cb00ea35 CG |
497 | alternate between laarr[0] and laarr[1] for locations of the |
498 | current extent, and the previous extent */ | |
499 | do { | |
500 | if (prev_epos.bh != cur_epos.bh) { | |
3bf25cb4 JK |
501 | brelse(prev_epos.bh); |
502 | get_bh(cur_epos.bh); | |
ff116fc8 | 503 | prev_epos.bh = cur_epos.bh; |
1da177e4 | 504 | } |
cb00ea35 | 505 | if (cur_epos.bh != next_epos.bh) { |
3bf25cb4 JK |
506 | brelse(cur_epos.bh); |
507 | get_bh(next_epos.bh); | |
ff116fc8 | 508 | cur_epos.bh = next_epos.bh; |
1da177e4 LT |
509 | } |
510 | ||
511 | lbcount += elen; | |
512 | ||
ff116fc8 JK |
513 | prev_epos.block = cur_epos.block; |
514 | cur_epos.block = next_epos.block; | |
1da177e4 | 515 | |
ff116fc8 JK |
516 | prev_epos.offset = cur_epos.offset; |
517 | cur_epos.offset = next_epos.offset; | |
1da177e4 | 518 | |
4b11111a MS |
519 | etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 1); |
520 | if (etype == -1) | |
1da177e4 LT |
521 | break; |
522 | ||
523 | c = !c; | |
524 | ||
525 | laarr[c].extLength = (etype << 30) | elen; | |
526 | laarr[c].extLocation = eloc; | |
527 | ||
528 | if (etype != (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) | |
529 | pgoal = eloc.logicalBlockNum + | |
28de7948 CG |
530 | ((elen + inode->i_sb->s_blocksize - 1) >> |
531 | inode->i_sb->s_blocksize_bits); | |
1da177e4 | 532 | |
cb00ea35 | 533 | count++; |
1da177e4 LT |
534 | } while (lbcount + elen <= b_off); |
535 | ||
536 | b_off -= lbcount; | |
537 | offset = b_off >> inode->i_sb->s_blocksize_bits; | |
85d71244 JK |
538 | /* |
539 | * Move prev_epos and cur_epos into indirect extent if we are at | |
540 | * the pointer to it | |
541 | */ | |
542 | udf_next_aext(inode, &prev_epos, &tmpeloc, &tmpelen, 0); | |
543 | udf_next_aext(inode, &cur_epos, &tmpeloc, &tmpelen, 0); | |
1da177e4 LT |
544 | |
545 | /* if the extent is allocated and recorded, return the block | |
cb00ea35 | 546 | if the extent is not a multiple of the blocksize, round up */ |
1da177e4 | 547 | |
cb00ea35 CG |
548 | if (etype == (EXT_RECORDED_ALLOCATED >> 30)) { |
549 | if (elen & (inode->i_sb->s_blocksize - 1)) { | |
1da177e4 | 550 | elen = EXT_RECORDED_ALLOCATED | |
28de7948 CG |
551 | ((elen + inode->i_sb->s_blocksize - 1) & |
552 | ~(inode->i_sb->s_blocksize - 1)); | |
ff116fc8 | 553 | etype = udf_write_aext(inode, &cur_epos, eloc, elen, 1); |
1da177e4 | 554 | } |
3bf25cb4 JK |
555 | brelse(prev_epos.bh); |
556 | brelse(cur_epos.bh); | |
557 | brelse(next_epos.bh); | |
1da177e4 LT |
558 | newblock = udf_get_lb_pblock(inode->i_sb, eloc, offset); |
559 | *phys = newblock; | |
560 | return NULL; | |
561 | } | |
562 | ||
31170b6a JK |
563 | last_block = block; |
564 | /* Are we beyond EOF? */ | |
cb00ea35 | 565 | if (etype == -1) { |
31170b6a JK |
566 | int ret; |
567 | ||
568 | if (count) { | |
569 | if (c) | |
570 | laarr[0] = laarr[1]; | |
571 | startnum = 1; | |
cb00ea35 | 572 | } else { |
31170b6a | 573 | /* Create a fake extent when there's not one */ |
4b11111a MS |
574 | memset(&laarr[0].extLocation, 0x00, |
575 | sizeof(kernel_lb_addr)); | |
31170b6a | 576 | laarr[0].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED; |
4b11111a MS |
577 | /* Will udf_extend_file() create real extent from |
578 | a fake one? */ | |
31170b6a JK |
579 | startnum = (offset > 0); |
580 | } | |
581 | /* Create extents for the hole between EOF and offset */ | |
582 | ret = udf_extend_file(inode, &prev_epos, laarr, offset); | |
583 | if (ret == -1) { | |
584 | brelse(prev_epos.bh); | |
585 | brelse(cur_epos.bh); | |
586 | brelse(next_epos.bh); | |
587 | /* We don't really know the error here so we just make | |
588 | * something up */ | |
589 | *err = -ENOSPC; | |
590 | return NULL; | |
591 | } | |
592 | c = 0; | |
593 | offset = 0; | |
594 | count += ret; | |
595 | /* We are not covered by a preallocated extent? */ | |
4b11111a MS |
596 | if ((laarr[0].extLength & UDF_EXTENT_FLAG_MASK) != |
597 | EXT_NOT_RECORDED_ALLOCATED) { | |
31170b6a JK |
598 | /* Is there any real extent? - otherwise we overwrite |
599 | * the fake one... */ | |
600 | if (count) | |
601 | c = !c; | |
602 | laarr[c].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | | |
28de7948 | 603 | inode->i_sb->s_blocksize; |
4b11111a MS |
604 | memset(&laarr[c].extLocation, 0x00, |
605 | sizeof(kernel_lb_addr)); | |
cb00ea35 CG |
606 | count++; |
607 | endnum++; | |
31170b6a | 608 | } |
cb00ea35 | 609 | endnum = c + 1; |
1da177e4 | 610 | lastblock = 1; |
cb00ea35 | 611 | } else { |
1da177e4 LT |
612 | endnum = startnum = ((count > 2) ? 2 : count); |
613 | ||
4b11111a MS |
614 | /* if the current extent is in position 0, |
615 | swap it with the previous */ | |
cb00ea35 | 616 | if (!c && count != 1) { |
31170b6a JK |
617 | laarr[2] = laarr[0]; |
618 | laarr[0] = laarr[1]; | |
619 | laarr[1] = laarr[2]; | |
620 | c = 1; | |
621 | } | |
1da177e4 | 622 | |
4b11111a MS |
623 | /* if the current block is located in an extent, |
624 | read the next extent */ | |
625 | etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 0); | |
626 | if (etype != -1) { | |
cb00ea35 CG |
627 | laarr[c + 1].extLength = (etype << 30) | elen; |
628 | laarr[c + 1].extLocation = eloc; | |
629 | count++; | |
630 | startnum++; | |
631 | endnum++; | |
4b11111a | 632 | } else |
1da177e4 LT |
633 | lastblock = 1; |
634 | } | |
1da177e4 LT |
635 | |
636 | /* if the current extent is not recorded but allocated, get the | |
28de7948 | 637 | * block in the extent corresponding to the requested block */ |
4b11111a | 638 | if ((laarr[c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30)) |
1da177e4 | 639 | newblocknum = laarr[c].extLocation.logicalBlockNum + offset; |
4b11111a | 640 | else { /* otherwise, allocate a new block */ |
48d6d8ff MS |
641 | if (iinfo->i_next_alloc_block == block) |
642 | goal = iinfo->i_next_alloc_goal; | |
1da177e4 | 643 | |
cb00ea35 | 644 | if (!goal) { |
4b11111a | 645 | if (!(goal = pgoal)) /* XXX: what was intended here? */ |
48d6d8ff | 646 | goal = iinfo->i_location.logicalBlockNum + 1; |
1da177e4 LT |
647 | } |
648 | ||
4b11111a | 649 | newblocknum = udf_new_block(inode->i_sb, inode, |
48d6d8ff | 650 | iinfo->i_location.partitionReferenceNum, |
4b11111a MS |
651 | goal, err); |
652 | if (!newblocknum) { | |
3bf25cb4 | 653 | brelse(prev_epos.bh); |
1da177e4 LT |
654 | *err = -ENOSPC; |
655 | return NULL; | |
656 | } | |
48d6d8ff | 657 | iinfo->i_lenExtents += inode->i_sb->s_blocksize; |
1da177e4 LT |
658 | } |
659 | ||
4b11111a MS |
660 | /* if the extent the requsted block is located in contains multiple |
661 | * blocks, split the extent into at most three extents. blocks prior | |
662 | * to requested block, requested block, and blocks after requested | |
663 | * block */ | |
1da177e4 LT |
664 | udf_split_extents(inode, &c, offset, newblocknum, laarr, &endnum); |
665 | ||
666 | #ifdef UDF_PREALLOCATE | |
667 | /* preallocate blocks */ | |
668 | udf_prealloc_extents(inode, c, lastblock, laarr, &endnum); | |
669 | #endif | |
670 | ||
671 | /* merge any continuous blocks in laarr */ | |
672 | udf_merge_extents(inode, laarr, &endnum); | |
673 | ||
674 | /* write back the new extents, inserting new extents if the new number | |
28de7948 CG |
675 | * of extents is greater than the old number, and deleting extents if |
676 | * the new number of extents is less than the old number */ | |
ff116fc8 | 677 | udf_update_extents(inode, laarr, startnum, endnum, &prev_epos); |
1da177e4 | 678 | |
3bf25cb4 | 679 | brelse(prev_epos.bh); |
1da177e4 | 680 | |
4b11111a | 681 | newblock = udf_get_pblock(inode->i_sb, newblocknum, |
48d6d8ff | 682 | iinfo->i_location.partitionReferenceNum, 0); |
4b11111a | 683 | if (!newblock) |
1da177e4 | 684 | return NULL; |
1da177e4 LT |
685 | *phys = newblock; |
686 | *err = 0; | |
687 | *new = 1; | |
48d6d8ff MS |
688 | iinfo->i_next_alloc_block = block; |
689 | iinfo->i_next_alloc_goal = newblocknum; | |
1da177e4 LT |
690 | inode->i_ctime = current_fs_time(inode->i_sb); |
691 | ||
692 | if (IS_SYNC(inode)) | |
693 | udf_sync_inode(inode); | |
694 | else | |
695 | mark_inode_dirty(inode); | |
28de7948 | 696 | |
1da177e4 LT |
697 | return result; |
698 | } | |
699 | ||
cb00ea35 CG |
700 | static void udf_split_extents(struct inode *inode, int *c, int offset, |
701 | int newblocknum, | |
702 | kernel_long_ad laarr[EXTENT_MERGE_SIZE], | |
703 | int *endnum) | |
1da177e4 | 704 | { |
4b11111a MS |
705 | unsigned long blocksize = inode->i_sb->s_blocksize; |
706 | unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; | |
707 | ||
1da177e4 | 708 | if ((laarr[*c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30) || |
4b11111a MS |
709 | (laarr[*c].extLength >> 30) == |
710 | (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) { | |
1da177e4 LT |
711 | int curr = *c; |
712 | int blen = ((laarr[curr].extLength & UDF_EXTENT_LENGTH_MASK) + | |
4b11111a | 713 | blocksize - 1) >> blocksize_bits; |
1da177e4 LT |
714 | int8_t etype = (laarr[curr].extLength >> 30); |
715 | ||
4b11111a | 716 | if (blen == 1) |
28de7948 | 717 | ; |
4b11111a | 718 | else if (!offset || blen == offset + 1) { |
cb00ea35 CG |
719 | laarr[curr + 2] = laarr[curr + 1]; |
720 | laarr[curr + 1] = laarr[curr]; | |
721 | } else { | |
722 | laarr[curr + 3] = laarr[curr + 1]; | |
723 | laarr[curr + 2] = laarr[curr + 1] = laarr[curr]; | |
724 | } | |
725 | ||
726 | if (offset) { | |
727 | if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30)) { | |
4b11111a MS |
728 | udf_free_blocks(inode->i_sb, inode, |
729 | laarr[curr].extLocation, | |
730 | 0, offset); | |
731 | laarr[curr].extLength = | |
732 | EXT_NOT_RECORDED_NOT_ALLOCATED | | |
733 | (offset << blocksize_bits); | |
1da177e4 | 734 | laarr[curr].extLocation.logicalBlockNum = 0; |
4b11111a MS |
735 | laarr[curr].extLocation. |
736 | partitionReferenceNum = 0; | |
737 | } else | |
1da177e4 | 738 | laarr[curr].extLength = (etype << 30) | |
4b11111a | 739 | (offset << blocksize_bits); |
cb00ea35 CG |
740 | curr++; |
741 | (*c)++; | |
742 | (*endnum)++; | |
1da177e4 | 743 | } |
647bd61a | 744 | |
1da177e4 LT |
745 | laarr[curr].extLocation.logicalBlockNum = newblocknum; |
746 | if (etype == (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) | |
747 | laarr[curr].extLocation.partitionReferenceNum = | |
c0b34438 | 748 | UDF_I(inode)->i_location.partitionReferenceNum; |
1da177e4 | 749 | laarr[curr].extLength = EXT_RECORDED_ALLOCATED | |
4b11111a | 750 | blocksize; |
cb00ea35 | 751 | curr++; |
1da177e4 | 752 | |
cb00ea35 | 753 | if (blen != offset + 1) { |
1da177e4 | 754 | if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30)) |
4b11111a MS |
755 | laarr[curr].extLocation.logicalBlockNum += |
756 | offset + 1; | |
28de7948 | 757 | laarr[curr].extLength = (etype << 30) | |
4b11111a | 758 | ((blen - (offset + 1)) << blocksize_bits); |
cb00ea35 CG |
759 | curr++; |
760 | (*endnum)++; | |
1da177e4 LT |
761 | } |
762 | } | |
763 | } | |
764 | ||
765 | static void udf_prealloc_extents(struct inode *inode, int c, int lastblock, | |
cb00ea35 CG |
766 | kernel_long_ad laarr[EXTENT_MERGE_SIZE], |
767 | int *endnum) | |
1da177e4 LT |
768 | { |
769 | int start, length = 0, currlength = 0, i; | |
770 | ||
cb00ea35 | 771 | if (*endnum >= (c + 1)) { |
1da177e4 LT |
772 | if (!lastblock) |
773 | return; | |
774 | else | |
775 | start = c; | |
cb00ea35 | 776 | } else { |
4b11111a MS |
777 | if ((laarr[c + 1].extLength >> 30) == |
778 | (EXT_NOT_RECORDED_ALLOCATED >> 30)) { | |
cb00ea35 | 779 | start = c + 1; |
4b11111a MS |
780 | length = currlength = |
781 | (((laarr[c + 1].extLength & | |
782 | UDF_EXTENT_LENGTH_MASK) + | |
783 | inode->i_sb->s_blocksize - 1) >> | |
784 | inode->i_sb->s_blocksize_bits); | |
785 | } else | |
1da177e4 LT |
786 | start = c; |
787 | } | |
788 | ||
cb00ea35 CG |
789 | for (i = start + 1; i <= *endnum; i++) { |
790 | if (i == *endnum) { | |
1da177e4 LT |
791 | if (lastblock) |
792 | length += UDF_DEFAULT_PREALLOC_BLOCKS; | |
4b11111a MS |
793 | } else if ((laarr[i].extLength >> 30) == |
794 | (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) { | |
795 | length += (((laarr[i].extLength & | |
796 | UDF_EXTENT_LENGTH_MASK) + | |
797 | inode->i_sb->s_blocksize - 1) >> | |
798 | inode->i_sb->s_blocksize_bits); | |
799 | } else | |
1da177e4 LT |
800 | break; |
801 | } | |
802 | ||
cb00ea35 | 803 | if (length) { |
1da177e4 | 804 | int next = laarr[start].extLocation.logicalBlockNum + |
28de7948 | 805 | (((laarr[start].extLength & UDF_EXTENT_LENGTH_MASK) + |
4b11111a MS |
806 | inode->i_sb->s_blocksize - 1) >> |
807 | inode->i_sb->s_blocksize_bits); | |
1da177e4 | 808 | int numalloc = udf_prealloc_blocks(inode->i_sb, inode, |
4b11111a MS |
809 | laarr[start].extLocation.partitionReferenceNum, |
810 | next, (UDF_DEFAULT_PREALLOC_BLOCKS > length ? | |
811 | length : UDF_DEFAULT_PREALLOC_BLOCKS) - | |
812 | currlength); | |
28de7948 | 813 | if (numalloc) { |
4b11111a | 814 | if (start == (c + 1)) |
1da177e4 | 815 | laarr[start].extLength += |
4b11111a MS |
816 | (numalloc << |
817 | inode->i_sb->s_blocksize_bits); | |
818 | else { | |
cb00ea35 CG |
819 | memmove(&laarr[c + 2], &laarr[c + 1], |
820 | sizeof(long_ad) * (*endnum - (c + 1))); | |
821 | (*endnum)++; | |
822 | laarr[c + 1].extLocation.logicalBlockNum = next; | |
823 | laarr[c + 1].extLocation.partitionReferenceNum = | |
4b11111a MS |
824 | laarr[c].extLocation. |
825 | partitionReferenceNum; | |
826 | laarr[c + 1].extLength = | |
827 | EXT_NOT_RECORDED_ALLOCATED | | |
828 | (numalloc << | |
829 | inode->i_sb->s_blocksize_bits); | |
cb00ea35 | 830 | start = c + 1; |
1da177e4 LT |
831 | } |
832 | ||
cb00ea35 | 833 | for (i = start + 1; numalloc && i < *endnum; i++) { |
4b11111a MS |
834 | int elen = ((laarr[i].extLength & |
835 | UDF_EXTENT_LENGTH_MASK) + | |
836 | inode->i_sb->s_blocksize - 1) >> | |
837 | inode->i_sb->s_blocksize_bits; | |
1da177e4 | 838 | |
cb00ea35 | 839 | if (elen > numalloc) { |
1da177e4 | 840 | laarr[i].extLength -= |
4b11111a MS |
841 | (numalloc << |
842 | inode->i_sb->s_blocksize_bits); | |
1da177e4 | 843 | numalloc = 0; |
cb00ea35 | 844 | } else { |
1da177e4 | 845 | numalloc -= elen; |
cb00ea35 | 846 | if (*endnum > (i + 1)) |
4b11111a MS |
847 | memmove(&laarr[i], |
848 | &laarr[i + 1], | |
849 | sizeof(long_ad) * | |
850 | (*endnum - (i + 1))); | |
cb00ea35 CG |
851 | i--; |
852 | (*endnum)--; | |
1da177e4 LT |
853 | } |
854 | } | |
c0b34438 | 855 | UDF_I(inode)->i_lenExtents += |
4b11111a | 856 | numalloc << inode->i_sb->s_blocksize_bits; |
1da177e4 LT |
857 | } |
858 | } | |
859 | } | |
860 | ||
861 | static void udf_merge_extents(struct inode *inode, | |
cb00ea35 CG |
862 | kernel_long_ad laarr[EXTENT_MERGE_SIZE], |
863 | int *endnum) | |
1da177e4 LT |
864 | { |
865 | int i; | |
4b11111a MS |
866 | unsigned long blocksize = inode->i_sb->s_blocksize; |
867 | unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; | |
1da177e4 | 868 | |
cb00ea35 | 869 | for (i = 0; i < (*endnum - 1); i++) { |
4b11111a MS |
870 | kernel_long_ad *li /*l[i]*/ = &laarr[i]; |
871 | kernel_long_ad *lip1 /*l[i plus 1]*/ = &laarr[i + 1]; | |
872 | ||
873 | if (((li->extLength >> 30) == (lip1->extLength >> 30)) && | |
874 | (((li->extLength >> 30) == | |
875 | (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) || | |
876 | ((lip1->extLocation.logicalBlockNum - | |
877 | li->extLocation.logicalBlockNum) == | |
878 | (((li->extLength & UDF_EXTENT_LENGTH_MASK) + | |
879 | blocksize - 1) >> blocksize_bits)))) { | |
880 | ||
881 | if (((li->extLength & UDF_EXTENT_LENGTH_MASK) + | |
882 | (lip1->extLength & UDF_EXTENT_LENGTH_MASK) + | |
883 | blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) { | |
884 | lip1->extLength = (lip1->extLength - | |
885 | (li->extLength & | |
886 | UDF_EXTENT_LENGTH_MASK) + | |
887 | UDF_EXTENT_LENGTH_MASK) & | |
888 | ~(blocksize - 1); | |
889 | li->extLength = (li->extLength & | |
890 | UDF_EXTENT_FLAG_MASK) + | |
891 | (UDF_EXTENT_LENGTH_MASK + 1) - | |
892 | blocksize; | |
893 | lip1->extLocation.logicalBlockNum = | |
894 | li->extLocation.logicalBlockNum + | |
895 | ((li->extLength & | |
896 | UDF_EXTENT_LENGTH_MASK) >> | |
897 | blocksize_bits); | |
898 | } else { | |
899 | li->extLength = lip1->extLength + | |
900 | (((li->extLength & | |
901 | UDF_EXTENT_LENGTH_MASK) + | |
902 | blocksize - 1) & ~(blocksize - 1)); | |
903 | if (*endnum > (i + 2)) | |
904 | memmove(&laarr[i + 1], &laarr[i + 2], | |
905 | sizeof(long_ad) * | |
906 | (*endnum - (i + 2))); | |
907 | i--; | |
908 | (*endnum)--; | |
1da177e4 | 909 | } |
4b11111a MS |
910 | } else if (((li->extLength >> 30) == |
911 | (EXT_NOT_RECORDED_ALLOCATED >> 30)) && | |
912 | ((lip1->extLength >> 30) == | |
913 | (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))) { | |
914 | udf_free_blocks(inode->i_sb, inode, li->extLocation, 0, | |
915 | ((li->extLength & | |
916 | UDF_EXTENT_LENGTH_MASK) + | |
917 | blocksize - 1) >> blocksize_bits); | |
918 | li->extLocation.logicalBlockNum = 0; | |
919 | li->extLocation.partitionReferenceNum = 0; | |
920 | ||
921 | if (((li->extLength & UDF_EXTENT_LENGTH_MASK) + | |
922 | (lip1->extLength & UDF_EXTENT_LENGTH_MASK) + | |
923 | blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) { | |
924 | lip1->extLength = (lip1->extLength - | |
925 | (li->extLength & | |
926 | UDF_EXTENT_LENGTH_MASK) + | |
927 | UDF_EXTENT_LENGTH_MASK) & | |
928 | ~(blocksize - 1); | |
929 | li->extLength = (li->extLength & | |
930 | UDF_EXTENT_FLAG_MASK) + | |
931 | (UDF_EXTENT_LENGTH_MASK + 1) - | |
932 | blocksize; | |
cb00ea35 | 933 | } else { |
4b11111a MS |
934 | li->extLength = lip1->extLength + |
935 | (((li->extLength & | |
936 | UDF_EXTENT_LENGTH_MASK) + | |
937 | blocksize - 1) & ~(blocksize - 1)); | |
cb00ea35 CG |
938 | if (*endnum > (i + 2)) |
939 | memmove(&laarr[i + 1], &laarr[i + 2], | |
4b11111a MS |
940 | sizeof(long_ad) * |
941 | (*endnum - (i + 2))); | |
cb00ea35 CG |
942 | i--; |
943 | (*endnum)--; | |
1da177e4 | 944 | } |
4b11111a MS |
945 | } else if ((li->extLength >> 30) == |
946 | (EXT_NOT_RECORDED_ALLOCATED >> 30)) { | |
947 | udf_free_blocks(inode->i_sb, inode, | |
948 | li->extLocation, 0, | |
949 | ((li->extLength & | |
950 | UDF_EXTENT_LENGTH_MASK) + | |
951 | blocksize - 1) >> blocksize_bits); | |
952 | li->extLocation.logicalBlockNum = 0; | |
953 | li->extLocation.partitionReferenceNum = 0; | |
954 | li->extLength = (li->extLength & | |
955 | UDF_EXTENT_LENGTH_MASK) | | |
956 | EXT_NOT_RECORDED_NOT_ALLOCATED; | |
1da177e4 LT |
957 | } |
958 | } | |
959 | } | |
960 | ||
961 | static void udf_update_extents(struct inode *inode, | |
cb00ea35 CG |
962 | kernel_long_ad laarr[EXTENT_MERGE_SIZE], |
963 | int startnum, int endnum, | |
964 | struct extent_position *epos) | |
1da177e4 LT |
965 | { |
966 | int start = 0, i; | |
967 | kernel_lb_addr tmploc; | |
968 | uint32_t tmplen; | |
969 | ||
cb00ea35 CG |
970 | if (startnum > endnum) { |
971 | for (i = 0; i < (startnum - endnum); i++) | |
ff116fc8 | 972 | udf_delete_aext(inode, *epos, laarr[i].extLocation, |
cb00ea35 CG |
973 | laarr[i].extLength); |
974 | } else if (startnum < endnum) { | |
975 | for (i = 0; i < (endnum - startnum); i++) { | |
ff116fc8 | 976 | udf_insert_aext(inode, *epos, laarr[i].extLocation, |
cb00ea35 | 977 | laarr[i].extLength); |
ff116fc8 | 978 | udf_next_aext(inode, epos, &laarr[i].extLocation, |
cb00ea35 CG |
979 | &laarr[i].extLength, 1); |
980 | start++; | |
1da177e4 LT |
981 | } |
982 | } | |
983 | ||
cb00ea35 | 984 | for (i = start; i < endnum; i++) { |
ff116fc8 JK |
985 | udf_next_aext(inode, epos, &tmploc, &tmplen, 0); |
986 | udf_write_aext(inode, epos, laarr[i].extLocation, | |
cb00ea35 | 987 | laarr[i].extLength, 1); |
1da177e4 LT |
988 | } |
989 | } | |
990 | ||
cb00ea35 CG |
991 | struct buffer_head *udf_bread(struct inode *inode, int block, |
992 | int create, int *err) | |
1da177e4 | 993 | { |
cb00ea35 | 994 | struct buffer_head *bh = NULL; |
1da177e4 LT |
995 | |
996 | bh = udf_getblk(inode, block, create, err); | |
997 | if (!bh) | |
998 | return NULL; | |
999 | ||
1000 | if (buffer_uptodate(bh)) | |
1001 | return bh; | |
28de7948 | 1002 | |
1da177e4 | 1003 | ll_rw_block(READ, 1, &bh); |
28de7948 | 1004 | |
1da177e4 LT |
1005 | wait_on_buffer(bh); |
1006 | if (buffer_uptodate(bh)) | |
1007 | return bh; | |
28de7948 | 1008 | |
1da177e4 LT |
1009 | brelse(bh); |
1010 | *err = -EIO; | |
1011 | return NULL; | |
1012 | } | |
1013 | ||
cb00ea35 | 1014 | void udf_truncate(struct inode *inode) |
1da177e4 LT |
1015 | { |
1016 | int offset; | |
1017 | int err; | |
48d6d8ff | 1018 | struct udf_inode_info *iinfo; |
1da177e4 LT |
1019 | |
1020 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || | |
cb00ea35 | 1021 | S_ISLNK(inode->i_mode))) |
1da177e4 LT |
1022 | return; |
1023 | if (IS_APPEND(inode) || IS_IMMUTABLE(inode)) | |
1024 | return; | |
1025 | ||
1026 | lock_kernel(); | |
48d6d8ff MS |
1027 | iinfo = UDF_I(inode); |
1028 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { | |
4b11111a MS |
1029 | if (inode->i_sb->s_blocksize < |
1030 | (udf_file_entry_alloc_offset(inode) + | |
1031 | inode->i_size)) { | |
1da177e4 | 1032 | udf_expand_file_adinicb(inode, inode->i_size, &err); |
48d6d8ff MS |
1033 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { |
1034 | inode->i_size = iinfo->i_lenAlloc; | |
1da177e4 LT |
1035 | unlock_kernel(); |
1036 | return; | |
4b11111a | 1037 | } else |
1da177e4 | 1038 | udf_truncate_extents(inode); |
cb00ea35 | 1039 | } else { |
1da177e4 | 1040 | offset = inode->i_size & (inode->i_sb->s_blocksize - 1); |
48d6d8ff | 1041 | memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr + offset, |
c0b34438 | 1042 | 0x00, inode->i_sb->s_blocksize - |
4b11111a | 1043 | offset - udf_file_entry_alloc_offset(inode)); |
48d6d8ff | 1044 | iinfo->i_lenAlloc = inode->i_size; |
1da177e4 | 1045 | } |
cb00ea35 | 1046 | } else { |
4b11111a MS |
1047 | block_truncate_page(inode->i_mapping, inode->i_size, |
1048 | udf_get_block); | |
1da177e4 | 1049 | udf_truncate_extents(inode); |
647bd61a | 1050 | } |
1da177e4 LT |
1051 | |
1052 | inode->i_mtime = inode->i_ctime = current_fs_time(inode->i_sb); | |
1053 | if (IS_SYNC(inode)) | |
cb00ea35 | 1054 | udf_sync_inode(inode); |
1da177e4 LT |
1055 | else |
1056 | mark_inode_dirty(inode); | |
1057 | unlock_kernel(); | |
1058 | } | |
1059 | ||
cb00ea35 | 1060 | static void __udf_read_inode(struct inode *inode) |
1da177e4 LT |
1061 | { |
1062 | struct buffer_head *bh = NULL; | |
1063 | struct fileEntry *fe; | |
1064 | uint16_t ident; | |
48d6d8ff | 1065 | struct udf_inode_info *iinfo = UDF_I(inode); |
1da177e4 LT |
1066 | |
1067 | /* | |
1068 | * Set defaults, but the inode is still incomplete! | |
1069 | * Note: get_new_inode() sets the following on a new inode: | |
1070 | * i_sb = sb | |
1071 | * i_no = ino | |
1072 | * i_flags = sb->s_flags | |
1073 | * i_state = 0 | |
1074 | * clean_inode(): zero fills and sets | |
1075 | * i_count = 1 | |
1076 | * i_nlink = 1 | |
1077 | * i_op = NULL; | |
1078 | */ | |
48d6d8ff | 1079 | bh = udf_read_ptagged(inode->i_sb, iinfo->i_location, 0, &ident); |
cb00ea35 | 1080 | if (!bh) { |
1da177e4 | 1081 | printk(KERN_ERR "udf: udf_read_inode(ino %ld) failed !bh\n", |
cb00ea35 | 1082 | inode->i_ino); |
1da177e4 LT |
1083 | make_bad_inode(inode); |
1084 | return; | |
1085 | } | |
1086 | ||
1087 | if (ident != TAG_IDENT_FE && ident != TAG_IDENT_EFE && | |
cb00ea35 | 1088 | ident != TAG_IDENT_USE) { |
4b11111a MS |
1089 | printk(KERN_ERR "udf: udf_read_inode(ino %ld) " |
1090 | "failed ident=%d\n", inode->i_ino, ident); | |
3bf25cb4 | 1091 | brelse(bh); |
1da177e4 LT |
1092 | make_bad_inode(inode); |
1093 | return; | |
1094 | } | |
1095 | ||
1096 | fe = (struct fileEntry *)bh->b_data; | |
1097 | ||
5e0f0017 | 1098 | if (fe->icbTag.strategyType == cpu_to_le16(4096)) { |
1ab92785 | 1099 | struct buffer_head *ibh; |
1da177e4 | 1100 | |
48d6d8ff | 1101 | ibh = udf_read_ptagged(inode->i_sb, iinfo->i_location, 1, |
4b11111a | 1102 | &ident); |
1ab92785 | 1103 | if (ident == TAG_IDENT_IE && ibh) { |
1104 | struct buffer_head *nbh = NULL; | |
1105 | kernel_lb_addr loc; | |
1106 | struct indirectEntry *ie; | |
1107 | ||
1108 | ie = (struct indirectEntry *)ibh->b_data; | |
1109 | loc = lelb_to_cpu(ie->indirectICB.extLocation); | |
1110 | ||
1111 | if (ie->indirectICB.extLength && | |
1112 | (nbh = udf_read_ptagged(inode->i_sb, loc, 0, | |
1113 | &ident))) { | |
1114 | if (ident == TAG_IDENT_FE || | |
1115 | ident == TAG_IDENT_EFE) { | |
1116 | memcpy(&iinfo->i_location, | |
1117 | &loc, | |
1118 | sizeof(kernel_lb_addr)); | |
1119 | brelse(bh); | |
3bf25cb4 | 1120 | brelse(ibh); |
1ab92785 | 1121 | brelse(nbh); |
1122 | __udf_read_inode(inode); | |
1123 | return; | |
28de7948 | 1124 | } |
1ab92785 | 1125 | brelse(nbh); |
1da177e4 | 1126 | } |
28de7948 | 1127 | } |
1ab92785 | 1128 | brelse(ibh); |
5e0f0017 | 1129 | } else if (fe->icbTag.strategyType != cpu_to_le16(4)) { |
1da177e4 | 1130 | printk(KERN_ERR "udf: unsupported strategy type: %d\n", |
cb00ea35 | 1131 | le16_to_cpu(fe->icbTag.strategyType)); |
3bf25cb4 | 1132 | brelse(bh); |
1da177e4 LT |
1133 | make_bad_inode(inode); |
1134 | return; | |
1135 | } | |
1136 | udf_fill_inode(inode, bh); | |
31170b6a | 1137 | |
3bf25cb4 | 1138 | brelse(bh); |
1da177e4 LT |
1139 | } |
1140 | ||
1141 | static void udf_fill_inode(struct inode *inode, struct buffer_head *bh) | |
1142 | { | |
1143 | struct fileEntry *fe; | |
1144 | struct extendedFileEntry *efe; | |
1da177e4 | 1145 | int offset; |
6c79e987 | 1146 | struct udf_sb_info *sbi = UDF_SB(inode->i_sb); |
48d6d8ff | 1147 | struct udf_inode_info *iinfo = UDF_I(inode); |
1da177e4 LT |
1148 | |
1149 | fe = (struct fileEntry *)bh->b_data; | |
1150 | efe = (struct extendedFileEntry *)bh->b_data; | |
1151 | ||
5e0f0017 | 1152 | if (fe->icbTag.strategyType == cpu_to_le16(4)) |
48d6d8ff | 1153 | iinfo->i_strat4096 = 0; |
5e0f0017 | 1154 | else /* if (fe->icbTag.strategyType == cpu_to_le16(4096)) */ |
48d6d8ff | 1155 | iinfo->i_strat4096 = 1; |
1da177e4 | 1156 | |
48d6d8ff | 1157 | iinfo->i_alloc_type = le16_to_cpu(fe->icbTag.flags) & |
4b11111a | 1158 | ICBTAG_FLAG_AD_MASK; |
48d6d8ff MS |
1159 | iinfo->i_unique = 0; |
1160 | iinfo->i_lenEAttr = 0; | |
1161 | iinfo->i_lenExtents = 0; | |
1162 | iinfo->i_lenAlloc = 0; | |
1163 | iinfo->i_next_alloc_block = 0; | |
1164 | iinfo->i_next_alloc_goal = 0; | |
5e0f0017 | 1165 | if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_EFE)) { |
48d6d8ff MS |
1166 | iinfo->i_efe = 1; |
1167 | iinfo->i_use = 0; | |
4b11111a MS |
1168 | if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize - |
1169 | sizeof(struct extendedFileEntry))) { | |
647bd61a CG |
1170 | make_bad_inode(inode); |
1171 | return; | |
1172 | } | |
48d6d8ff | 1173 | memcpy(iinfo->i_ext.i_data, |
4b11111a MS |
1174 | bh->b_data + sizeof(struct extendedFileEntry), |
1175 | inode->i_sb->s_blocksize - | |
1176 | sizeof(struct extendedFileEntry)); | |
5e0f0017 | 1177 | } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_FE)) { |
48d6d8ff MS |
1178 | iinfo->i_efe = 0; |
1179 | iinfo->i_use = 0; | |
4b11111a MS |
1180 | if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize - |
1181 | sizeof(struct fileEntry))) { | |
647bd61a CG |
1182 | make_bad_inode(inode); |
1183 | return; | |
1184 | } | |
48d6d8ff | 1185 | memcpy(iinfo->i_ext.i_data, |
c0b34438 | 1186 | bh->b_data + sizeof(struct fileEntry), |
cb00ea35 | 1187 | inode->i_sb->s_blocksize - sizeof(struct fileEntry)); |
5e0f0017 | 1188 | } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_USE)) { |
48d6d8ff MS |
1189 | iinfo->i_efe = 0; |
1190 | iinfo->i_use = 1; | |
1191 | iinfo->i_lenAlloc = le32_to_cpu( | |
4b11111a MS |
1192 | ((struct unallocSpaceEntry *)bh->b_data)-> |
1193 | lengthAllocDescs); | |
1194 | if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize - | |
1195 | sizeof(struct unallocSpaceEntry))) { | |
647bd61a CG |
1196 | make_bad_inode(inode); |
1197 | return; | |
1198 | } | |
48d6d8ff | 1199 | memcpy(iinfo->i_ext.i_data, |
4b11111a MS |
1200 | bh->b_data + sizeof(struct unallocSpaceEntry), |
1201 | inode->i_sb->s_blocksize - | |
1202 | sizeof(struct unallocSpaceEntry)); | |
1da177e4 LT |
1203 | return; |
1204 | } | |
1205 | ||
1206 | inode->i_uid = le32_to_cpu(fe->uid); | |
ca76d2d8 CG |
1207 | if (inode->i_uid == -1 || |
1208 | UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_IGNORE) || | |
1209 | UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_SET)) | |
4d6660eb | 1210 | inode->i_uid = UDF_SB(inode->i_sb)->s_uid; |
1da177e4 LT |
1211 | |
1212 | inode->i_gid = le32_to_cpu(fe->gid); | |
ca76d2d8 CG |
1213 | if (inode->i_gid == -1 || |
1214 | UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_IGNORE) || | |
1215 | UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_SET)) | |
4d6660eb | 1216 | inode->i_gid = UDF_SB(inode->i_sb)->s_gid; |
1da177e4 LT |
1217 | |
1218 | inode->i_nlink = le16_to_cpu(fe->fileLinkCount); | |
1219 | if (!inode->i_nlink) | |
1220 | inode->i_nlink = 1; | |
647bd61a | 1221 | |
1da177e4 | 1222 | inode->i_size = le64_to_cpu(fe->informationLength); |
48d6d8ff | 1223 | iinfo->i_lenExtents = inode->i_size; |
1da177e4 LT |
1224 | |
1225 | inode->i_mode = udf_convert_permissions(fe); | |
1226 | inode->i_mode &= ~UDF_SB(inode->i_sb)->s_umask; | |
1227 | ||
48d6d8ff | 1228 | if (iinfo->i_efe == 0) { |
1da177e4 | 1229 | inode->i_blocks = le64_to_cpu(fe->logicalBlocksRecorded) << |
28de7948 | 1230 | (inode->i_sb->s_blocksize_bits - 9); |
1da177e4 | 1231 | |
56774805 | 1232 | if (!udf_disk_stamp_to_time(&inode->i_atime, fe->accessTime)) |
cbf5676a | 1233 | inode->i_atime = sbi->s_record_time; |
1234 | ||
56774805 MS |
1235 | if (!udf_disk_stamp_to_time(&inode->i_mtime, |
1236 | fe->modificationTime)) | |
cbf5676a | 1237 | inode->i_mtime = sbi->s_record_time; |
1238 | ||
56774805 | 1239 | if (!udf_disk_stamp_to_time(&inode->i_ctime, fe->attrTime)) |
cbf5676a | 1240 | inode->i_ctime = sbi->s_record_time; |
1da177e4 | 1241 | |
48d6d8ff MS |
1242 | iinfo->i_unique = le64_to_cpu(fe->uniqueID); |
1243 | iinfo->i_lenEAttr = le32_to_cpu(fe->lengthExtendedAttr); | |
1244 | iinfo->i_lenAlloc = le32_to_cpu(fe->lengthAllocDescs); | |
1245 | offset = sizeof(struct fileEntry) + iinfo->i_lenEAttr; | |
cb00ea35 | 1246 | } else { |
647bd61a | 1247 | inode->i_blocks = le64_to_cpu(efe->logicalBlocksRecorded) << |
cb00ea35 | 1248 | (inode->i_sb->s_blocksize_bits - 9); |
1da177e4 | 1249 | |
56774805 | 1250 | if (!udf_disk_stamp_to_time(&inode->i_atime, efe->accessTime)) |
cbf5676a | 1251 | inode->i_atime = sbi->s_record_time; |
1252 | ||
56774805 MS |
1253 | if (!udf_disk_stamp_to_time(&inode->i_mtime, |
1254 | efe->modificationTime)) | |
cbf5676a | 1255 | inode->i_mtime = sbi->s_record_time; |
1256 | ||
56774805 | 1257 | if (!udf_disk_stamp_to_time(&iinfo->i_crtime, efe->createTime)) |
cbf5676a | 1258 | iinfo->i_crtime = sbi->s_record_time; |
1259 | ||
56774805 | 1260 | if (!udf_disk_stamp_to_time(&inode->i_ctime, efe->attrTime)) |
cbf5676a | 1261 | inode->i_ctime = sbi->s_record_time; |
1da177e4 | 1262 | |
48d6d8ff MS |
1263 | iinfo->i_unique = le64_to_cpu(efe->uniqueID); |
1264 | iinfo->i_lenEAttr = le32_to_cpu(efe->lengthExtendedAttr); | |
1265 | iinfo->i_lenAlloc = le32_to_cpu(efe->lengthAllocDescs); | |
4b11111a | 1266 | offset = sizeof(struct extendedFileEntry) + |
48d6d8ff | 1267 | iinfo->i_lenEAttr; |
1da177e4 LT |
1268 | } |
1269 | ||
cb00ea35 CG |
1270 | switch (fe->icbTag.fileType) { |
1271 | case ICBTAG_FILE_TYPE_DIRECTORY: | |
28de7948 CG |
1272 | inode->i_op = &udf_dir_inode_operations; |
1273 | inode->i_fop = &udf_dir_operations; | |
1274 | inode->i_mode |= S_IFDIR; | |
1275 | inc_nlink(inode); | |
1276 | break; | |
cb00ea35 CG |
1277 | case ICBTAG_FILE_TYPE_REALTIME: |
1278 | case ICBTAG_FILE_TYPE_REGULAR: | |
1279 | case ICBTAG_FILE_TYPE_UNDEF: | |
742e1795 | 1280 | case ICBTAG_FILE_TYPE_VAT20: |
48d6d8ff | 1281 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
28de7948 CG |
1282 | inode->i_data.a_ops = &udf_adinicb_aops; |
1283 | else | |
1284 | inode->i_data.a_ops = &udf_aops; | |
1285 | inode->i_op = &udf_file_inode_operations; | |
1286 | inode->i_fop = &udf_file_operations; | |
1287 | inode->i_mode |= S_IFREG; | |
1288 | break; | |
cb00ea35 | 1289 | case ICBTAG_FILE_TYPE_BLOCK: |
28de7948 CG |
1290 | inode->i_mode |= S_IFBLK; |
1291 | break; | |
cb00ea35 | 1292 | case ICBTAG_FILE_TYPE_CHAR: |
28de7948 CG |
1293 | inode->i_mode |= S_IFCHR; |
1294 | break; | |
cb00ea35 | 1295 | case ICBTAG_FILE_TYPE_FIFO: |
28de7948 CG |
1296 | init_special_inode(inode, inode->i_mode | S_IFIFO, 0); |
1297 | break; | |
cb00ea35 | 1298 | case ICBTAG_FILE_TYPE_SOCKET: |
28de7948 CG |
1299 | init_special_inode(inode, inode->i_mode | S_IFSOCK, 0); |
1300 | break; | |
cb00ea35 | 1301 | case ICBTAG_FILE_TYPE_SYMLINK: |
28de7948 CG |
1302 | inode->i_data.a_ops = &udf_symlink_aops; |
1303 | inode->i_op = &page_symlink_inode_operations; | |
1304 | inode->i_mode = S_IFLNK | S_IRWXUGO; | |
1305 | break; | |
bfb257a5 JK |
1306 | case ICBTAG_FILE_TYPE_MAIN: |
1307 | udf_debug("METADATA FILE-----\n"); | |
1308 | break; | |
1309 | case ICBTAG_FILE_TYPE_MIRROR: | |
1310 | udf_debug("METADATA MIRROR FILE-----\n"); | |
1311 | break; | |
1312 | case ICBTAG_FILE_TYPE_BITMAP: | |
1313 | udf_debug("METADATA BITMAP FILE-----\n"); | |
1314 | break; | |
cb00ea35 | 1315 | default: |
4b11111a MS |
1316 | printk(KERN_ERR "udf: udf_fill_inode(ino %ld) failed unknown " |
1317 | "file type=%d\n", inode->i_ino, | |
1318 | fe->icbTag.fileType); | |
28de7948 CG |
1319 | make_bad_inode(inode); |
1320 | return; | |
1da177e4 | 1321 | } |
cb00ea35 | 1322 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { |
4b11111a MS |
1323 | struct deviceSpec *dsea = |
1324 | (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1); | |
cb00ea35 CG |
1325 | if (dsea) { |
1326 | init_special_inode(inode, inode->i_mode, | |
4b11111a MS |
1327 | MKDEV(le32_to_cpu(dsea->majorDeviceIdent), |
1328 | le32_to_cpu(dsea->minorDeviceIdent))); | |
1da177e4 | 1329 | /* Developer ID ??? */ |
4b11111a | 1330 | } else |
1da177e4 | 1331 | make_bad_inode(inode); |
1da177e4 LT |
1332 | } |
1333 | } | |
1334 | ||
647bd61a CG |
1335 | static int udf_alloc_i_data(struct inode *inode, size_t size) |
1336 | { | |
48d6d8ff MS |
1337 | struct udf_inode_info *iinfo = UDF_I(inode); |
1338 | iinfo->i_ext.i_data = kmalloc(size, GFP_KERNEL); | |
647bd61a | 1339 | |
48d6d8ff | 1340 | if (!iinfo->i_ext.i_data) { |
4b11111a MS |
1341 | printk(KERN_ERR "udf:udf_alloc_i_data (ino %ld) " |
1342 | "no free memory\n", inode->i_ino); | |
647bd61a CG |
1343 | return -ENOMEM; |
1344 | } | |
1345 | ||
1346 | return 0; | |
1347 | } | |
1348 | ||
cb00ea35 | 1349 | static mode_t udf_convert_permissions(struct fileEntry *fe) |
1da177e4 LT |
1350 | { |
1351 | mode_t mode; | |
1352 | uint32_t permissions; | |
1353 | uint32_t flags; | |
1354 | ||
1355 | permissions = le32_to_cpu(fe->permissions); | |
1356 | flags = le16_to_cpu(fe->icbTag.flags); | |
1357 | ||
4b11111a MS |
1358 | mode = ((permissions) & S_IRWXO) | |
1359 | ((permissions >> 2) & S_IRWXG) | | |
1360 | ((permissions >> 4) & S_IRWXU) | | |
1361 | ((flags & ICBTAG_FLAG_SETUID) ? S_ISUID : 0) | | |
1362 | ((flags & ICBTAG_FLAG_SETGID) ? S_ISGID : 0) | | |
1363 | ((flags & ICBTAG_FLAG_STICKY) ? S_ISVTX : 0); | |
1da177e4 LT |
1364 | |
1365 | return mode; | |
1366 | } | |
1367 | ||
cb00ea35 | 1368 | int udf_write_inode(struct inode *inode, int sync) |
1da177e4 LT |
1369 | { |
1370 | int ret; | |
28de7948 | 1371 | |
1da177e4 LT |
1372 | lock_kernel(); |
1373 | ret = udf_update_inode(inode, sync); | |
1374 | unlock_kernel(); | |
28de7948 | 1375 | |
1da177e4 LT |
1376 | return ret; |
1377 | } | |
1378 | ||
cb00ea35 | 1379 | int udf_sync_inode(struct inode *inode) |
1da177e4 LT |
1380 | { |
1381 | return udf_update_inode(inode, 1); | |
1382 | } | |
1383 | ||
cb00ea35 | 1384 | static int udf_update_inode(struct inode *inode, int do_sync) |
1da177e4 LT |
1385 | { |
1386 | struct buffer_head *bh = NULL; | |
1387 | struct fileEntry *fe; | |
1388 | struct extendedFileEntry *efe; | |
1389 | uint32_t udfperms; | |
1390 | uint16_t icbflags; | |
1391 | uint16_t crclen; | |
1da177e4 | 1392 | int err = 0; |
6c79e987 | 1393 | struct udf_sb_info *sbi = UDF_SB(inode->i_sb); |
4b11111a | 1394 | unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; |
48d6d8ff | 1395 | struct udf_inode_info *iinfo = UDF_I(inode); |
1da177e4 | 1396 | |
4b11111a MS |
1397 | bh = udf_tread(inode->i_sb, |
1398 | udf_get_lb_pblock(inode->i_sb, | |
48d6d8ff | 1399 | iinfo->i_location, 0)); |
cb00ea35 | 1400 | if (!bh) { |
1da177e4 LT |
1401 | udf_debug("bread failure\n"); |
1402 | return -EIO; | |
1403 | } | |
1404 | ||
1405 | memset(bh->b_data, 0x00, inode->i_sb->s_blocksize); | |
1406 | ||
1407 | fe = (struct fileEntry *)bh->b_data; | |
1408 | efe = (struct extendedFileEntry *)bh->b_data; | |
1409 | ||
5e0f0017 | 1410 | if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_USE)) { |
1da177e4 | 1411 | struct unallocSpaceEntry *use = |
28de7948 | 1412 | (struct unallocSpaceEntry *)bh->b_data; |
1da177e4 | 1413 | |
48d6d8ff | 1414 | use->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc); |
4b11111a | 1415 | memcpy(bh->b_data + sizeof(struct unallocSpaceEntry), |
48d6d8ff | 1416 | iinfo->i_ext.i_data, inode->i_sb->s_blocksize - |
4b11111a MS |
1417 | sizeof(struct unallocSpaceEntry)); |
1418 | crclen = sizeof(struct unallocSpaceEntry) + | |
48d6d8ff | 1419 | iinfo->i_lenAlloc - sizeof(tag); |
4b11111a | 1420 | use->descTag.tagLocation = cpu_to_le32( |
48d6d8ff | 1421 | iinfo->i_location. |
4b11111a | 1422 | logicalBlockNum); |
1da177e4 | 1423 | use->descTag.descCRCLength = cpu_to_le16(crclen); |
f845fced BC |
1424 | use->descTag.descCRC = cpu_to_le16(crc_itu_t(0, (char *)use + |
1425 | sizeof(tag), | |
1426 | crclen)); | |
3f2587bb | 1427 | use->descTag.tagChecksum = udf_tag_checksum(&use->descTag); |
1da177e4 LT |
1428 | |
1429 | mark_buffer_dirty(bh); | |
3bf25cb4 | 1430 | brelse(bh); |
1da177e4 LT |
1431 | return err; |
1432 | } | |
1433 | ||
4d6660eb PS |
1434 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_FORGET)) |
1435 | fe->uid = cpu_to_le32(-1); | |
cb00ea35 CG |
1436 | else |
1437 | fe->uid = cpu_to_le32(inode->i_uid); | |
1da177e4 | 1438 | |
4d6660eb PS |
1439 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_FORGET)) |
1440 | fe->gid = cpu_to_le32(-1); | |
cb00ea35 CG |
1441 | else |
1442 | fe->gid = cpu_to_le32(inode->i_gid); | |
1da177e4 | 1443 | |
4b11111a MS |
1444 | udfperms = ((inode->i_mode & S_IRWXO)) | |
1445 | ((inode->i_mode & S_IRWXG) << 2) | | |
1446 | ((inode->i_mode & S_IRWXU) << 4); | |
1da177e4 | 1447 | |
4b11111a MS |
1448 | udfperms |= (le32_to_cpu(fe->permissions) & |
1449 | (FE_PERM_O_DELETE | FE_PERM_O_CHATTR | | |
1450 | FE_PERM_G_DELETE | FE_PERM_G_CHATTR | | |
1451 | FE_PERM_U_DELETE | FE_PERM_U_CHATTR)); | |
1da177e4 LT |
1452 | fe->permissions = cpu_to_le32(udfperms); |
1453 | ||
1454 | if (S_ISDIR(inode->i_mode)) | |
1455 | fe->fileLinkCount = cpu_to_le16(inode->i_nlink - 1); | |
1456 | else | |
1457 | fe->fileLinkCount = cpu_to_le16(inode->i_nlink); | |
1458 | ||
1459 | fe->informationLength = cpu_to_le64(inode->i_size); | |
1460 | ||
cb00ea35 | 1461 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { |
1da177e4 | 1462 | regid *eid; |
28de7948 CG |
1463 | struct deviceSpec *dsea = |
1464 | (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1); | |
cb00ea35 | 1465 | if (!dsea) { |
1da177e4 | 1466 | dsea = (struct deviceSpec *) |
28de7948 CG |
1467 | udf_add_extendedattr(inode, |
1468 | sizeof(struct deviceSpec) + | |
1469 | sizeof(regid), 12, 0x3); | |
1da177e4 LT |
1470 | dsea->attrType = cpu_to_le32(12); |
1471 | dsea->attrSubtype = 1; | |
4b11111a MS |
1472 | dsea->attrLength = cpu_to_le32( |
1473 | sizeof(struct deviceSpec) + | |
1474 | sizeof(regid)); | |
1da177e4 LT |
1475 | dsea->impUseLength = cpu_to_le32(sizeof(regid)); |
1476 | } | |
28de7948 | 1477 | eid = (regid *)dsea->impUse; |
1da177e4 LT |
1478 | memset(eid, 0, sizeof(regid)); |
1479 | strcpy(eid->ident, UDF_ID_DEVELOPER); | |
1480 | eid->identSuffix[0] = UDF_OS_CLASS_UNIX; | |
1481 | eid->identSuffix[1] = UDF_OS_ID_LINUX; | |
1482 | dsea->majorDeviceIdent = cpu_to_le32(imajor(inode)); | |
1483 | dsea->minorDeviceIdent = cpu_to_le32(iminor(inode)); | |
1484 | } | |
1485 | ||
48d6d8ff | 1486 | if (iinfo->i_efe == 0) { |
c0b34438 | 1487 | memcpy(bh->b_data + sizeof(struct fileEntry), |
48d6d8ff | 1488 | iinfo->i_ext.i_data, |
cb00ea35 | 1489 | inode->i_sb->s_blocksize - sizeof(struct fileEntry)); |
28de7948 | 1490 | fe->logicalBlocksRecorded = cpu_to_le64( |
4b11111a MS |
1491 | (inode->i_blocks + (1 << (blocksize_bits - 9)) - 1) >> |
1492 | (blocksize_bits - 9)); | |
1da177e4 | 1493 | |
56774805 MS |
1494 | udf_time_to_disk_stamp(&fe->accessTime, inode->i_atime); |
1495 | udf_time_to_disk_stamp(&fe->modificationTime, inode->i_mtime); | |
1496 | udf_time_to_disk_stamp(&fe->attrTime, inode->i_ctime); | |
1da177e4 LT |
1497 | memset(&(fe->impIdent), 0, sizeof(regid)); |
1498 | strcpy(fe->impIdent.ident, UDF_ID_DEVELOPER); | |
1499 | fe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; | |
1500 | fe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; | |
48d6d8ff MS |
1501 | fe->uniqueID = cpu_to_le64(iinfo->i_unique); |
1502 | fe->lengthExtendedAttr = cpu_to_le32(iinfo->i_lenEAttr); | |
1503 | fe->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc); | |
1da177e4 LT |
1504 | fe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_FE); |
1505 | crclen = sizeof(struct fileEntry); | |
cb00ea35 | 1506 | } else { |
4b11111a | 1507 | memcpy(bh->b_data + sizeof(struct extendedFileEntry), |
48d6d8ff | 1508 | iinfo->i_ext.i_data, |
4b11111a MS |
1509 | inode->i_sb->s_blocksize - |
1510 | sizeof(struct extendedFileEntry)); | |
1da177e4 | 1511 | efe->objectSize = cpu_to_le64(inode->i_size); |
28de7948 | 1512 | efe->logicalBlocksRecorded = cpu_to_le64( |
4b11111a MS |
1513 | (inode->i_blocks + (1 << (blocksize_bits - 9)) - 1) >> |
1514 | (blocksize_bits - 9)); | |
1da177e4 | 1515 | |
48d6d8ff MS |
1516 | if (iinfo->i_crtime.tv_sec > inode->i_atime.tv_sec || |
1517 | (iinfo->i_crtime.tv_sec == inode->i_atime.tv_sec && | |
1518 | iinfo->i_crtime.tv_nsec > inode->i_atime.tv_nsec)) | |
1519 | iinfo->i_crtime = inode->i_atime; | |
4b11111a | 1520 | |
48d6d8ff MS |
1521 | if (iinfo->i_crtime.tv_sec > inode->i_mtime.tv_sec || |
1522 | (iinfo->i_crtime.tv_sec == inode->i_mtime.tv_sec && | |
1523 | iinfo->i_crtime.tv_nsec > inode->i_mtime.tv_nsec)) | |
1524 | iinfo->i_crtime = inode->i_mtime; | |
4b11111a | 1525 | |
48d6d8ff MS |
1526 | if (iinfo->i_crtime.tv_sec > inode->i_ctime.tv_sec || |
1527 | (iinfo->i_crtime.tv_sec == inode->i_ctime.tv_sec && | |
1528 | iinfo->i_crtime.tv_nsec > inode->i_ctime.tv_nsec)) | |
1529 | iinfo->i_crtime = inode->i_ctime; | |
1da177e4 | 1530 | |
56774805 MS |
1531 | udf_time_to_disk_stamp(&efe->accessTime, inode->i_atime); |
1532 | udf_time_to_disk_stamp(&efe->modificationTime, inode->i_mtime); | |
1533 | udf_time_to_disk_stamp(&efe->createTime, iinfo->i_crtime); | |
1534 | udf_time_to_disk_stamp(&efe->attrTime, inode->i_ctime); | |
1da177e4 LT |
1535 | |
1536 | memset(&(efe->impIdent), 0, sizeof(regid)); | |
1537 | strcpy(efe->impIdent.ident, UDF_ID_DEVELOPER); | |
1538 | efe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; | |
1539 | efe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; | |
48d6d8ff MS |
1540 | efe->uniqueID = cpu_to_le64(iinfo->i_unique); |
1541 | efe->lengthExtendedAttr = cpu_to_le32(iinfo->i_lenEAttr); | |
1542 | efe->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc); | |
1da177e4 LT |
1543 | efe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_EFE); |
1544 | crclen = sizeof(struct extendedFileEntry); | |
1545 | } | |
48d6d8ff | 1546 | if (iinfo->i_strat4096) { |
1da177e4 LT |
1547 | fe->icbTag.strategyType = cpu_to_le16(4096); |
1548 | fe->icbTag.strategyParameter = cpu_to_le16(1); | |
1549 | fe->icbTag.numEntries = cpu_to_le16(2); | |
cb00ea35 | 1550 | } else { |
1da177e4 LT |
1551 | fe->icbTag.strategyType = cpu_to_le16(4); |
1552 | fe->icbTag.numEntries = cpu_to_le16(1); | |
1553 | } | |
1554 | ||
1555 | if (S_ISDIR(inode->i_mode)) | |
1556 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_DIRECTORY; | |
1557 | else if (S_ISREG(inode->i_mode)) | |
1558 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_REGULAR; | |
1559 | else if (S_ISLNK(inode->i_mode)) | |
1560 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_SYMLINK; | |
1561 | else if (S_ISBLK(inode->i_mode)) | |
1562 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_BLOCK; | |
1563 | else if (S_ISCHR(inode->i_mode)) | |
1564 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_CHAR; | |
1565 | else if (S_ISFIFO(inode->i_mode)) | |
1566 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_FIFO; | |
1567 | else if (S_ISSOCK(inode->i_mode)) | |
1568 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_SOCKET; | |
1569 | ||
48d6d8ff | 1570 | icbflags = iinfo->i_alloc_type | |
28de7948 CG |
1571 | ((inode->i_mode & S_ISUID) ? ICBTAG_FLAG_SETUID : 0) | |
1572 | ((inode->i_mode & S_ISGID) ? ICBTAG_FLAG_SETGID : 0) | | |
1573 | ((inode->i_mode & S_ISVTX) ? ICBTAG_FLAG_STICKY : 0) | | |
1574 | (le16_to_cpu(fe->icbTag.flags) & | |
1575 | ~(ICBTAG_FLAG_AD_MASK | ICBTAG_FLAG_SETUID | | |
1576 | ICBTAG_FLAG_SETGID | ICBTAG_FLAG_STICKY)); | |
1da177e4 LT |
1577 | |
1578 | fe->icbTag.flags = cpu_to_le16(icbflags); | |
6c79e987 | 1579 | if (sbi->s_udfrev >= 0x0200) |
1da177e4 LT |
1580 | fe->descTag.descVersion = cpu_to_le16(3); |
1581 | else | |
1582 | fe->descTag.descVersion = cpu_to_le16(2); | |
6c79e987 | 1583 | fe->descTag.tagSerialNum = cpu_to_le16(sbi->s_serial_number); |
4b11111a | 1584 | fe->descTag.tagLocation = cpu_to_le32( |
48d6d8ff MS |
1585 | iinfo->i_location.logicalBlockNum); |
1586 | crclen += iinfo->i_lenEAttr + iinfo->i_lenAlloc - | |
c0b34438 | 1587 | sizeof(tag); |
1da177e4 | 1588 | fe->descTag.descCRCLength = cpu_to_le16(crclen); |
f845fced BC |
1589 | fe->descTag.descCRC = cpu_to_le16(crc_itu_t(0, (char *)fe + sizeof(tag), |
1590 | crclen)); | |
3f2587bb | 1591 | fe->descTag.tagChecksum = udf_tag_checksum(&fe->descTag); |
1da177e4 LT |
1592 | |
1593 | /* write the data blocks */ | |
1594 | mark_buffer_dirty(bh); | |
cb00ea35 | 1595 | if (do_sync) { |
1da177e4 | 1596 | sync_dirty_buffer(bh); |
cb00ea35 | 1597 | if (buffer_req(bh) && !buffer_uptodate(bh)) { |
4b11111a MS |
1598 | printk(KERN_WARNING "IO error syncing udf inode " |
1599 | "[%s:%08lx]\n", inode->i_sb->s_id, | |
1600 | inode->i_ino); | |
1da177e4 LT |
1601 | err = -EIO; |
1602 | } | |
1603 | } | |
3bf25cb4 | 1604 | brelse(bh); |
28de7948 | 1605 | |
1da177e4 LT |
1606 | return err; |
1607 | } | |
1608 | ||
cb00ea35 | 1609 | struct inode *udf_iget(struct super_block *sb, kernel_lb_addr ino) |
1da177e4 LT |
1610 | { |
1611 | unsigned long block = udf_get_lb_pblock(sb, ino, 0); | |
1612 | struct inode *inode = iget_locked(sb, block); | |
1613 | ||
1614 | if (!inode) | |
1615 | return NULL; | |
1616 | ||
1617 | if (inode->i_state & I_NEW) { | |
c0b34438 | 1618 | memcpy(&UDF_I(inode)->i_location, &ino, sizeof(kernel_lb_addr)); |
1da177e4 LT |
1619 | __udf_read_inode(inode); |
1620 | unlock_new_inode(inode); | |
1621 | } | |
1622 | ||
1623 | if (is_bad_inode(inode)) | |
1624 | goto out_iput; | |
1625 | ||
4b11111a MS |
1626 | if (ino.logicalBlockNum >= UDF_SB(sb)-> |
1627 | s_partmaps[ino.partitionReferenceNum].s_partition_len) { | |
1da177e4 | 1628 | udf_debug("block=%d, partition=%d out of range\n", |
cb00ea35 | 1629 | ino.logicalBlockNum, ino.partitionReferenceNum); |
1da177e4 LT |
1630 | make_bad_inode(inode); |
1631 | goto out_iput; | |
1632 | } | |
1633 | ||
1634 | return inode; | |
1635 | ||
28de7948 | 1636 | out_iput: |
1da177e4 LT |
1637 | iput(inode); |
1638 | return NULL; | |
1639 | } | |
1640 | ||
4b11111a | 1641 | int8_t udf_add_aext(struct inode *inode, struct extent_position *epos, |
cb00ea35 | 1642 | kernel_lb_addr eloc, uint32_t elen, int inc) |
1da177e4 LT |
1643 | { |
1644 | int adsize; | |
1645 | short_ad *sad = NULL; | |
1646 | long_ad *lad = NULL; | |
1647 | struct allocExtDesc *aed; | |
1648 | int8_t etype; | |
1649 | uint8_t *ptr; | |
48d6d8ff | 1650 | struct udf_inode_info *iinfo = UDF_I(inode); |
1da177e4 | 1651 | |
ff116fc8 | 1652 | if (!epos->bh) |
48d6d8ff | 1653 | ptr = iinfo->i_ext.i_data + epos->offset - |
4b11111a | 1654 | udf_file_entry_alloc_offset(inode) + |
48d6d8ff | 1655 | iinfo->i_lenEAttr; |
1da177e4 | 1656 | else |
ff116fc8 | 1657 | ptr = epos->bh->b_data + epos->offset; |
1da177e4 | 1658 | |
48d6d8ff | 1659 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
1da177e4 | 1660 | adsize = sizeof(short_ad); |
48d6d8ff | 1661 | else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
1da177e4 LT |
1662 | adsize = sizeof(long_ad); |
1663 | else | |
1664 | return -1; | |
1665 | ||
cb00ea35 | 1666 | if (epos->offset + (2 * adsize) > inode->i_sb->s_blocksize) { |
1da177e4 LT |
1667 | char *sptr, *dptr; |
1668 | struct buffer_head *nbh; | |
1669 | int err, loffset; | |
ff116fc8 | 1670 | kernel_lb_addr obloc = epos->block; |
1da177e4 | 1671 | |
4b11111a MS |
1672 | epos->block.logicalBlockNum = udf_new_block(inode->i_sb, NULL, |
1673 | obloc.partitionReferenceNum, | |
1674 | obloc.logicalBlockNum, &err); | |
1675 | if (!epos->block.logicalBlockNum) | |
1da177e4 | 1676 | return -1; |
4b11111a MS |
1677 | nbh = udf_tgetblk(inode->i_sb, udf_get_lb_pblock(inode->i_sb, |
1678 | epos->block, | |
1679 | 0)); | |
1680 | if (!nbh) | |
1da177e4 | 1681 | return -1; |
1da177e4 LT |
1682 | lock_buffer(nbh); |
1683 | memset(nbh->b_data, 0x00, inode->i_sb->s_blocksize); | |
1684 | set_buffer_uptodate(nbh); | |
1685 | unlock_buffer(nbh); | |
1686 | mark_buffer_dirty_inode(nbh, inode); | |
1687 | ||
1688 | aed = (struct allocExtDesc *)(nbh->b_data); | |
1689 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT)) | |
4b11111a MS |
1690 | aed->previousAllocExtLocation = |
1691 | cpu_to_le32(obloc.logicalBlockNum); | |
cb00ea35 | 1692 | if (epos->offset + adsize > inode->i_sb->s_blocksize) { |
ff116fc8 | 1693 | loffset = epos->offset; |
1da177e4 LT |
1694 | aed->lengthAllocDescs = cpu_to_le32(adsize); |
1695 | sptr = ptr - adsize; | |
1696 | dptr = nbh->b_data + sizeof(struct allocExtDesc); | |
1697 | memcpy(dptr, sptr, adsize); | |
ff116fc8 | 1698 | epos->offset = sizeof(struct allocExtDesc) + adsize; |
cb00ea35 | 1699 | } else { |
ff116fc8 | 1700 | loffset = epos->offset + adsize; |
1da177e4 LT |
1701 | aed->lengthAllocDescs = cpu_to_le32(0); |
1702 | sptr = ptr; | |
ff116fc8 | 1703 | epos->offset = sizeof(struct allocExtDesc); |
1da177e4 | 1704 | |
cb00ea35 | 1705 | if (epos->bh) { |
ff116fc8 | 1706 | aed = (struct allocExtDesc *)epos->bh->b_data; |
c2104fda | 1707 | le32_add_cpu(&aed->lengthAllocDescs, adsize); |
cb00ea35 | 1708 | } else { |
48d6d8ff | 1709 | iinfo->i_lenAlloc += adsize; |
1da177e4 LT |
1710 | mark_inode_dirty(inode); |
1711 | } | |
1712 | } | |
6c79e987 | 1713 | if (UDF_SB(inode->i_sb)->s_udfrev >= 0x0200) |
1da177e4 | 1714 | udf_new_tag(nbh->b_data, TAG_IDENT_AED, 3, 1, |
cb00ea35 | 1715 | epos->block.logicalBlockNum, sizeof(tag)); |
1da177e4 LT |
1716 | else |
1717 | udf_new_tag(nbh->b_data, TAG_IDENT_AED, 2, 1, | |
cb00ea35 | 1718 | epos->block.logicalBlockNum, sizeof(tag)); |
48d6d8ff | 1719 | switch (iinfo->i_alloc_type) { |
cb00ea35 | 1720 | case ICBTAG_FLAG_AD_SHORT: |
28de7948 CG |
1721 | sad = (short_ad *)sptr; |
1722 | sad->extLength = cpu_to_le32(EXT_NEXT_EXTENT_ALLOCDECS | | |
1723 | inode->i_sb->s_blocksize); | |
4b11111a MS |
1724 | sad->extPosition = |
1725 | cpu_to_le32(epos->block.logicalBlockNum); | |
28de7948 | 1726 | break; |
cb00ea35 | 1727 | case ICBTAG_FLAG_AD_LONG: |
28de7948 CG |
1728 | lad = (long_ad *)sptr; |
1729 | lad->extLength = cpu_to_le32(EXT_NEXT_EXTENT_ALLOCDECS | | |
1730 | inode->i_sb->s_blocksize); | |
1731 | lad->extLocation = cpu_to_lelb(epos->block); | |
1732 | memset(lad->impUse, 0x00, sizeof(lad->impUse)); | |
1733 | break; | |
1da177e4 | 1734 | } |
cb00ea35 | 1735 | if (epos->bh) { |
28de7948 | 1736 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
6c79e987 | 1737 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) |
ff116fc8 | 1738 | udf_update_tag(epos->bh->b_data, loffset); |
1da177e4 | 1739 | else |
4b11111a MS |
1740 | udf_update_tag(epos->bh->b_data, |
1741 | sizeof(struct allocExtDesc)); | |
ff116fc8 | 1742 | mark_buffer_dirty_inode(epos->bh, inode); |
3bf25cb4 | 1743 | brelse(epos->bh); |
28de7948 | 1744 | } else { |
1da177e4 | 1745 | mark_inode_dirty(inode); |
28de7948 | 1746 | } |
ff116fc8 | 1747 | epos->bh = nbh; |
1da177e4 LT |
1748 | } |
1749 | ||
ff116fc8 | 1750 | etype = udf_write_aext(inode, epos, eloc, elen, inc); |
1da177e4 | 1751 | |
cb00ea35 | 1752 | if (!epos->bh) { |
48d6d8ff | 1753 | iinfo->i_lenAlloc += adsize; |
1da177e4 | 1754 | mark_inode_dirty(inode); |
cb00ea35 | 1755 | } else { |
ff116fc8 | 1756 | aed = (struct allocExtDesc *)epos->bh->b_data; |
c2104fda | 1757 | le32_add_cpu(&aed->lengthAllocDescs, adsize); |
4b11111a MS |
1758 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
1759 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) | |
1760 | udf_update_tag(epos->bh->b_data, | |
1761 | epos->offset + (inc ? 0 : adsize)); | |
1da177e4 | 1762 | else |
4b11111a MS |
1763 | udf_update_tag(epos->bh->b_data, |
1764 | sizeof(struct allocExtDesc)); | |
ff116fc8 | 1765 | mark_buffer_dirty_inode(epos->bh, inode); |
1da177e4 LT |
1766 | } |
1767 | ||
1768 | return etype; | |
1769 | } | |
1770 | ||
4b11111a | 1771 | int8_t udf_write_aext(struct inode *inode, struct extent_position *epos, |
cb00ea35 | 1772 | kernel_lb_addr eloc, uint32_t elen, int inc) |
1da177e4 LT |
1773 | { |
1774 | int adsize; | |
1775 | uint8_t *ptr; | |
28de7948 CG |
1776 | short_ad *sad; |
1777 | long_ad *lad; | |
48d6d8ff | 1778 | struct udf_inode_info *iinfo = UDF_I(inode); |
1da177e4 | 1779 | |
ff116fc8 | 1780 | if (!epos->bh) |
48d6d8ff | 1781 | ptr = iinfo->i_ext.i_data + epos->offset - |
4b11111a | 1782 | udf_file_entry_alloc_offset(inode) + |
48d6d8ff | 1783 | iinfo->i_lenEAttr; |
1da177e4 | 1784 | else |
ff116fc8 | 1785 | ptr = epos->bh->b_data + epos->offset; |
1da177e4 | 1786 | |
48d6d8ff | 1787 | switch (iinfo->i_alloc_type) { |
cb00ea35 | 1788 | case ICBTAG_FLAG_AD_SHORT: |
28de7948 CG |
1789 | sad = (short_ad *)ptr; |
1790 | sad->extLength = cpu_to_le32(elen); | |
1791 | sad->extPosition = cpu_to_le32(eloc.logicalBlockNum); | |
1792 | adsize = sizeof(short_ad); | |
1793 | break; | |
cb00ea35 | 1794 | case ICBTAG_FLAG_AD_LONG: |
28de7948 CG |
1795 | lad = (long_ad *)ptr; |
1796 | lad->extLength = cpu_to_le32(elen); | |
1797 | lad->extLocation = cpu_to_lelb(eloc); | |
1798 | memset(lad->impUse, 0x00, sizeof(lad->impUse)); | |
1799 | adsize = sizeof(long_ad); | |
1800 | break; | |
cb00ea35 CG |
1801 | default: |
1802 | return -1; | |
1da177e4 LT |
1803 | } |
1804 | ||
cb00ea35 | 1805 | if (epos->bh) { |
28de7948 | 1806 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
6c79e987 | 1807 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) { |
4b11111a MS |
1808 | struct allocExtDesc *aed = |
1809 | (struct allocExtDesc *)epos->bh->b_data; | |
ff116fc8 | 1810 | udf_update_tag(epos->bh->b_data, |
4b11111a MS |
1811 | le32_to_cpu(aed->lengthAllocDescs) + |
1812 | sizeof(struct allocExtDesc)); | |
1da177e4 | 1813 | } |
ff116fc8 | 1814 | mark_buffer_dirty_inode(epos->bh, inode); |
28de7948 | 1815 | } else { |
1da177e4 | 1816 | mark_inode_dirty(inode); |
28de7948 | 1817 | } |
1da177e4 LT |
1818 | |
1819 | if (inc) | |
ff116fc8 | 1820 | epos->offset += adsize; |
28de7948 | 1821 | |
1da177e4 LT |
1822 | return (elen >> 30); |
1823 | } | |
1824 | ||
4b11111a MS |
1825 | int8_t udf_next_aext(struct inode *inode, struct extent_position *epos, |
1826 | kernel_lb_addr *eloc, uint32_t *elen, int inc) | |
1da177e4 LT |
1827 | { |
1828 | int8_t etype; | |
1829 | ||
ff116fc8 | 1830 | while ((etype = udf_current_aext(inode, epos, eloc, elen, inc)) == |
cb00ea35 | 1831 | (EXT_NEXT_EXTENT_ALLOCDECS >> 30)) { |
4b11111a | 1832 | int block; |
ff116fc8 JK |
1833 | epos->block = *eloc; |
1834 | epos->offset = sizeof(struct allocExtDesc); | |
3bf25cb4 | 1835 | brelse(epos->bh); |
4b11111a MS |
1836 | block = udf_get_lb_pblock(inode->i_sb, epos->block, 0); |
1837 | epos->bh = udf_tread(inode->i_sb, block); | |
1838 | if (!epos->bh) { | |
1839 | udf_debug("reading block %d failed!\n", block); | |
1da177e4 LT |
1840 | return -1; |
1841 | } | |
1842 | } | |
1843 | ||
1844 | return etype; | |
1845 | } | |
1846 | ||
4b11111a MS |
1847 | int8_t udf_current_aext(struct inode *inode, struct extent_position *epos, |
1848 | kernel_lb_addr *eloc, uint32_t *elen, int inc) | |
1da177e4 LT |
1849 | { |
1850 | int alen; | |
1851 | int8_t etype; | |
1852 | uint8_t *ptr; | |
28de7948 CG |
1853 | short_ad *sad; |
1854 | long_ad *lad; | |
48d6d8ff | 1855 | struct udf_inode_info *iinfo = UDF_I(inode); |
28de7948 | 1856 | |
cb00ea35 | 1857 | if (!epos->bh) { |
ff116fc8 JK |
1858 | if (!epos->offset) |
1859 | epos->offset = udf_file_entry_alloc_offset(inode); | |
48d6d8ff | 1860 | ptr = iinfo->i_ext.i_data + epos->offset - |
4b11111a | 1861 | udf_file_entry_alloc_offset(inode) + |
48d6d8ff | 1862 | iinfo->i_lenEAttr; |
4b11111a | 1863 | alen = udf_file_entry_alloc_offset(inode) + |
48d6d8ff | 1864 | iinfo->i_lenAlloc; |
cb00ea35 | 1865 | } else { |
ff116fc8 JK |
1866 | if (!epos->offset) |
1867 | epos->offset = sizeof(struct allocExtDesc); | |
1868 | ptr = epos->bh->b_data + epos->offset; | |
28de7948 | 1869 | alen = sizeof(struct allocExtDesc) + |
4b11111a MS |
1870 | le32_to_cpu(((struct allocExtDesc *)epos->bh->b_data)-> |
1871 | lengthAllocDescs); | |
1da177e4 LT |
1872 | } |
1873 | ||
48d6d8ff | 1874 | switch (iinfo->i_alloc_type) { |
cb00ea35 | 1875 | case ICBTAG_FLAG_AD_SHORT: |
4b11111a MS |
1876 | sad = udf_get_fileshortad(ptr, alen, &epos->offset, inc); |
1877 | if (!sad) | |
28de7948 CG |
1878 | return -1; |
1879 | etype = le32_to_cpu(sad->extLength) >> 30; | |
1880 | eloc->logicalBlockNum = le32_to_cpu(sad->extPosition); | |
4b11111a | 1881 | eloc->partitionReferenceNum = |
48d6d8ff | 1882 | iinfo->i_location.partitionReferenceNum; |
28de7948 CG |
1883 | *elen = le32_to_cpu(sad->extLength) & UDF_EXTENT_LENGTH_MASK; |
1884 | break; | |
cb00ea35 | 1885 | case ICBTAG_FLAG_AD_LONG: |
4b11111a MS |
1886 | lad = udf_get_filelongad(ptr, alen, &epos->offset, inc); |
1887 | if (!lad) | |
1da177e4 | 1888 | return -1; |
28de7948 CG |
1889 | etype = le32_to_cpu(lad->extLength) >> 30; |
1890 | *eloc = lelb_to_cpu(lad->extLocation); | |
1891 | *elen = le32_to_cpu(lad->extLength) & UDF_EXTENT_LENGTH_MASK; | |
1892 | break; | |
1893 | default: | |
4b11111a | 1894 | udf_debug("alloc_type = %d unsupported\n", |
48d6d8ff | 1895 | iinfo->i_alloc_type); |
28de7948 | 1896 | return -1; |
1da177e4 LT |
1897 | } |
1898 | ||
1899 | return etype; | |
1900 | } | |
1901 | ||
28de7948 CG |
1902 | static int8_t udf_insert_aext(struct inode *inode, struct extent_position epos, |
1903 | kernel_lb_addr neloc, uint32_t nelen) | |
1da177e4 LT |
1904 | { |
1905 | kernel_lb_addr oeloc; | |
1906 | uint32_t oelen; | |
1907 | int8_t etype; | |
1908 | ||
ff116fc8 | 1909 | if (epos.bh) |
3bf25cb4 | 1910 | get_bh(epos.bh); |
1da177e4 | 1911 | |
cb00ea35 | 1912 | while ((etype = udf_next_aext(inode, &epos, &oeloc, &oelen, 0)) != -1) { |
ff116fc8 | 1913 | udf_write_aext(inode, &epos, neloc, nelen, 1); |
1da177e4 LT |
1914 | neloc = oeloc; |
1915 | nelen = (etype << 30) | oelen; | |
1916 | } | |
ff116fc8 | 1917 | udf_add_aext(inode, &epos, neloc, nelen, 1); |
3bf25cb4 | 1918 | brelse(epos.bh); |
28de7948 | 1919 | |
1da177e4 LT |
1920 | return (nelen >> 30); |
1921 | } | |
1922 | ||
4b11111a | 1923 | int8_t udf_delete_aext(struct inode *inode, struct extent_position epos, |
cb00ea35 | 1924 | kernel_lb_addr eloc, uint32_t elen) |
1da177e4 | 1925 | { |
ff116fc8 JK |
1926 | struct extent_position oepos; |
1927 | int adsize; | |
1da177e4 LT |
1928 | int8_t etype; |
1929 | struct allocExtDesc *aed; | |
48d6d8ff | 1930 | struct udf_inode_info *iinfo; |
1da177e4 | 1931 | |
cb00ea35 | 1932 | if (epos.bh) { |
3bf25cb4 JK |
1933 | get_bh(epos.bh); |
1934 | get_bh(epos.bh); | |
1da177e4 LT |
1935 | } |
1936 | ||
48d6d8ff MS |
1937 | iinfo = UDF_I(inode); |
1938 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) | |
1da177e4 | 1939 | adsize = sizeof(short_ad); |
48d6d8ff | 1940 | else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
1da177e4 LT |
1941 | adsize = sizeof(long_ad); |
1942 | else | |
1943 | adsize = 0; | |
1944 | ||
ff116fc8 JK |
1945 | oepos = epos; |
1946 | if (udf_next_aext(inode, &epos, &eloc, &elen, 1) == -1) | |
1da177e4 LT |
1947 | return -1; |
1948 | ||
cb00ea35 | 1949 | while ((etype = udf_next_aext(inode, &epos, &eloc, &elen, 1)) != -1) { |
ff116fc8 | 1950 | udf_write_aext(inode, &oepos, eloc, (etype << 30) | elen, 1); |
cb00ea35 | 1951 | if (oepos.bh != epos.bh) { |
ff116fc8 | 1952 | oepos.block = epos.block; |
3bf25cb4 JK |
1953 | brelse(oepos.bh); |
1954 | get_bh(epos.bh); | |
ff116fc8 JK |
1955 | oepos.bh = epos.bh; |
1956 | oepos.offset = epos.offset - adsize; | |
1da177e4 LT |
1957 | } |
1958 | } | |
1959 | memset(&eloc, 0x00, sizeof(kernel_lb_addr)); | |
1960 | elen = 0; | |
1961 | ||
cb00ea35 | 1962 | if (epos.bh != oepos.bh) { |
ff116fc8 JK |
1963 | udf_free_blocks(inode->i_sb, inode, epos.block, 0, 1); |
1964 | udf_write_aext(inode, &oepos, eloc, elen, 1); | |
1965 | udf_write_aext(inode, &oepos, eloc, elen, 1); | |
cb00ea35 | 1966 | if (!oepos.bh) { |
48d6d8ff | 1967 | iinfo->i_lenAlloc -= (adsize * 2); |
1da177e4 | 1968 | mark_inode_dirty(inode); |
cb00ea35 | 1969 | } else { |
ff116fc8 | 1970 | aed = (struct allocExtDesc *)oepos.bh->b_data; |
c2104fda | 1971 | le32_add_cpu(&aed->lengthAllocDescs, -(2 * adsize)); |
28de7948 | 1972 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
6c79e987 | 1973 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) |
4b11111a MS |
1974 | udf_update_tag(oepos.bh->b_data, |
1975 | oepos.offset - (2 * adsize)); | |
1da177e4 | 1976 | else |
4b11111a MS |
1977 | udf_update_tag(oepos.bh->b_data, |
1978 | sizeof(struct allocExtDesc)); | |
ff116fc8 | 1979 | mark_buffer_dirty_inode(oepos.bh, inode); |
1da177e4 | 1980 | } |
cb00ea35 | 1981 | } else { |
ff116fc8 | 1982 | udf_write_aext(inode, &oepos, eloc, elen, 1); |
cb00ea35 | 1983 | if (!oepos.bh) { |
48d6d8ff | 1984 | iinfo->i_lenAlloc -= adsize; |
1da177e4 | 1985 | mark_inode_dirty(inode); |
cb00ea35 | 1986 | } else { |
ff116fc8 | 1987 | aed = (struct allocExtDesc *)oepos.bh->b_data; |
c2104fda | 1988 | le32_add_cpu(&aed->lengthAllocDescs, -adsize); |
28de7948 | 1989 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
6c79e987 | 1990 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) |
4b11111a MS |
1991 | udf_update_tag(oepos.bh->b_data, |
1992 | epos.offset - adsize); | |
1da177e4 | 1993 | else |
4b11111a MS |
1994 | udf_update_tag(oepos.bh->b_data, |
1995 | sizeof(struct allocExtDesc)); | |
ff116fc8 | 1996 | mark_buffer_dirty_inode(oepos.bh, inode); |
1da177e4 LT |
1997 | } |
1998 | } | |
647bd61a | 1999 | |
3bf25cb4 JK |
2000 | brelse(epos.bh); |
2001 | brelse(oepos.bh); | |
28de7948 | 2002 | |
1da177e4 LT |
2003 | return (elen >> 30); |
2004 | } | |
2005 | ||
4b11111a MS |
2006 | int8_t inode_bmap(struct inode *inode, sector_t block, |
2007 | struct extent_position *pos, kernel_lb_addr *eloc, | |
2008 | uint32_t *elen, sector_t *offset) | |
1da177e4 | 2009 | { |
4b11111a | 2010 | unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; |
cb00ea35 | 2011 | loff_t lbcount = 0, bcount = |
4b11111a | 2012 | (loff_t) block << blocksize_bits; |
1da177e4 | 2013 | int8_t etype; |
48d6d8ff | 2014 | struct udf_inode_info *iinfo; |
1da177e4 | 2015 | |
48d6d8ff | 2016 | iinfo = UDF_I(inode); |
ff116fc8 | 2017 | pos->offset = 0; |
48d6d8ff | 2018 | pos->block = iinfo->i_location; |
ff116fc8 | 2019 | pos->bh = NULL; |
1da177e4 | 2020 | *elen = 0; |
1da177e4 | 2021 | |
cb00ea35 | 2022 | do { |
4b11111a MS |
2023 | etype = udf_next_aext(inode, pos, eloc, elen, 1); |
2024 | if (etype == -1) { | |
2025 | *offset = (bcount - lbcount) >> blocksize_bits; | |
48d6d8ff | 2026 | iinfo->i_lenExtents = lbcount; |
1da177e4 LT |
2027 | return -1; |
2028 | } | |
2029 | lbcount += *elen; | |
2030 | } while (lbcount <= bcount); | |
2031 | ||
4b11111a | 2032 | *offset = (bcount + *elen - lbcount) >> blocksize_bits; |
1da177e4 LT |
2033 | |
2034 | return etype; | |
2035 | } | |
2036 | ||
60448b1d | 2037 | long udf_block_map(struct inode *inode, sector_t block) |
1da177e4 | 2038 | { |
ff116fc8 JK |
2039 | kernel_lb_addr eloc; |
2040 | uint32_t elen; | |
60448b1d | 2041 | sector_t offset; |
28de7948 | 2042 | struct extent_position epos = {}; |
1da177e4 LT |
2043 | int ret; |
2044 | ||
2045 | lock_kernel(); | |
2046 | ||
4b11111a MS |
2047 | if (inode_bmap(inode, block, &epos, &eloc, &elen, &offset) == |
2048 | (EXT_RECORDED_ALLOCATED >> 30)) | |
60448b1d | 2049 | ret = udf_get_lb_pblock(inode->i_sb, eloc, offset); |
1da177e4 LT |
2050 | else |
2051 | ret = 0; | |
2052 | ||
2053 | unlock_kernel(); | |
3bf25cb4 | 2054 | brelse(epos.bh); |
1da177e4 LT |
2055 | |
2056 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_VARCONV)) | |
2057 | return udf_fixed_to_variable(ret); | |
2058 | else | |
2059 | return ret; | |
2060 | } |