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> | |
1da177e4 LT |
34 | #include <linux/module.h> |
35 | #include <linux/pagemap.h> | |
36 | #include <linux/buffer_head.h> | |
37 | #include <linux/writeback.h> | |
38 | #include <linux/slab.h> | |
f845fced | 39 | #include <linux/crc-itu-t.h> |
bc112323 | 40 | #include <linux/mpage.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 *); | |
49521de1 | 54 | static int udf_sync_inode(struct inode *inode); |
647bd61a | 55 | static int udf_alloc_i_data(struct inode *inode, size_t size); |
60448b1d | 56 | static struct buffer_head *inode_getblk(struct inode *, sector_t, int *, |
1ed16171 | 57 | sector_t *, int *); |
ff116fc8 | 58 | static int8_t udf_insert_aext(struct inode *, struct extent_position, |
5ca4e4be | 59 | struct kernel_lb_addr, uint32_t); |
1da177e4 | 60 | static void udf_split_extents(struct inode *, int *, int, int, |
5ca4e4be | 61 | struct kernel_long_ad[EXTENT_MERGE_SIZE], int *); |
1da177e4 | 62 | static void udf_prealloc_extents(struct inode *, int, int, |
5ca4e4be | 63 | struct kernel_long_ad[EXTENT_MERGE_SIZE], int *); |
1da177e4 | 64 | static void udf_merge_extents(struct inode *, |
5ca4e4be | 65 | struct kernel_long_ad[EXTENT_MERGE_SIZE], int *); |
1da177e4 | 66 | static void udf_update_extents(struct inode *, |
5ca4e4be | 67 | struct kernel_long_ad[EXTENT_MERGE_SIZE], int, int, |
cb00ea35 | 68 | struct extent_position *); |
1da177e4 LT |
69 | static int udf_get_block(struct inode *, sector_t, struct buffer_head *, int); |
70 | ||
b1e32126 | 71 | |
3aac2b62 | 72 | void udf_evict_inode(struct inode *inode) |
1da177e4 | 73 | { |
2c948b3f | 74 | struct udf_inode_info *iinfo = UDF_I(inode); |
3aac2b62 AV |
75 | int want_delete = 0; |
76 | ||
3aac2b62 AV |
77 | if (!inode->i_nlink && !is_bad_inode(inode)) { |
78 | want_delete = 1; | |
7e49b6f2 | 79 | udf_setsize(inode, 0); |
3aac2b62 | 80 | udf_update_inode(inode, IS_SYNC(inode)); |
7e49b6f2 JK |
81 | } else |
82 | truncate_inode_pages(&inode->i_data, 0); | |
3aac2b62 AV |
83 | invalidate_inode_buffers(inode); |
84 | end_writeback(inode); | |
2c948b3f JK |
85 | if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB && |
86 | inode->i_size != iinfo->i_lenExtents) { | |
78ace70c JP |
87 | udf_warn(inode->i_sb, "Inode %lu (mode %o) has inode size %llu different from extent length %llu. Filesystem need not be standards compliant.\n", |
88 | inode->i_ino, inode->i_mode, | |
89 | (unsigned long long)inode->i_size, | |
90 | (unsigned long long)iinfo->i_lenExtents); | |
1da177e4 | 91 | } |
48d6d8ff MS |
92 | kfree(iinfo->i_ext.i_data); |
93 | iinfo->i_ext.i_data = NULL; | |
3aac2b62 | 94 | if (want_delete) { |
3aac2b62 | 95 | udf_free_inode(inode); |
3aac2b62 | 96 | } |
1da177e4 LT |
97 | } |
98 | ||
99 | static int udf_writepage(struct page *page, struct writeback_control *wbc) | |
100 | { | |
101 | return block_write_full_page(page, udf_get_block, wbc); | |
102 | } | |
103 | ||
104 | static int udf_readpage(struct file *file, struct page *page) | |
105 | { | |
bc112323 NJ |
106 | return mpage_readpage(page, udf_get_block); |
107 | } | |
108 | ||
109 | static int udf_readpages(struct file *file, struct address_space *mapping, | |
110 | struct list_head *pages, unsigned nr_pages) | |
111 | { | |
112 | return mpage_readpages(mapping, pages, nr_pages, udf_get_block); | |
1da177e4 LT |
113 | } |
114 | ||
be021ee4 NP |
115 | static int udf_write_begin(struct file *file, struct address_space *mapping, |
116 | loff_t pos, unsigned len, unsigned flags, | |
117 | struct page **pagep, void **fsdata) | |
1da177e4 | 118 | { |
155130a4 CH |
119 | int ret; |
120 | ||
121 | ret = block_write_begin(mapping, pos, len, flags, pagep, udf_get_block); | |
122 | if (unlikely(ret)) { | |
7e49b6f2 JK |
123 | struct inode *inode = mapping->host; |
124 | struct udf_inode_info *iinfo = UDF_I(inode); | |
125 | loff_t isize = inode->i_size; | |
126 | ||
127 | if (pos + len > isize) { | |
128 | truncate_pagecache(inode, pos + len, isize); | |
129 | if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { | |
130 | down_write(&iinfo->i_data_sem); | |
131 | udf_truncate_extents(inode); | |
132 | up_write(&iinfo->i_data_sem); | |
133 | } | |
134 | } | |
155130a4 CH |
135 | } |
136 | ||
137 | return ret; | |
1da177e4 LT |
138 | } |
139 | ||
140 | static sector_t udf_bmap(struct address_space *mapping, sector_t block) | |
141 | { | |
cb00ea35 | 142 | return generic_block_bmap(mapping, block, udf_get_block); |
1da177e4 LT |
143 | } |
144 | ||
f5e54d6e | 145 | const struct address_space_operations udf_aops = { |
28de7948 | 146 | .readpage = udf_readpage, |
bc112323 | 147 | .readpages = udf_readpages, |
28de7948 | 148 | .writepage = udf_writepage, |
be021ee4 NP |
149 | .write_begin = udf_write_begin, |
150 | .write_end = generic_write_end, | |
28de7948 | 151 | .bmap = udf_bmap, |
1da177e4 LT |
152 | }; |
153 | ||
7e49b6f2 | 154 | int udf_expand_file_adinicb(struct inode *inode) |
1da177e4 LT |
155 | { |
156 | struct page *page; | |
157 | char *kaddr; | |
48d6d8ff | 158 | struct udf_inode_info *iinfo = UDF_I(inode); |
7e49b6f2 | 159 | int err; |
1da177e4 LT |
160 | struct writeback_control udf_wbc = { |
161 | .sync_mode = WB_SYNC_NONE, | |
162 | .nr_to_write = 1, | |
163 | }; | |
164 | ||
48d6d8ff | 165 | if (!iinfo->i_lenAlloc) { |
1da177e4 | 166 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) |
48d6d8ff | 167 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT; |
1da177e4 | 168 | else |
48d6d8ff | 169 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG; |
7e49b6f2 JK |
170 | /* from now on we have normal address_space methods */ |
171 | inode->i_data.a_ops = &udf_aops; | |
1da177e4 | 172 | mark_inode_dirty(inode); |
7e49b6f2 | 173 | return 0; |
1da177e4 LT |
174 | } |
175 | ||
7e49b6f2 JK |
176 | page = find_or_create_page(inode->i_mapping, 0, GFP_NOFS); |
177 | if (!page) | |
178 | return -ENOMEM; | |
cd7619d6 | 179 | |
cb00ea35 | 180 | if (!PageUptodate(page)) { |
1da177e4 | 181 | kaddr = kmap(page); |
48d6d8ff MS |
182 | memset(kaddr + iinfo->i_lenAlloc, 0x00, |
183 | PAGE_CACHE_SIZE - iinfo->i_lenAlloc); | |
184 | memcpy(kaddr, iinfo->i_ext.i_data + iinfo->i_lenEAttr, | |
185 | iinfo->i_lenAlloc); | |
1da177e4 LT |
186 | flush_dcache_page(page); |
187 | SetPageUptodate(page); | |
188 | kunmap(page); | |
189 | } | |
48d6d8ff MS |
190 | memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr, 0x00, |
191 | iinfo->i_lenAlloc); | |
192 | iinfo->i_lenAlloc = 0; | |
1da177e4 | 193 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) |
48d6d8ff | 194 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT; |
1da177e4 | 195 | else |
48d6d8ff | 196 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG; |
7e49b6f2 JK |
197 | /* from now on we have normal address_space methods */ |
198 | inode->i_data.a_ops = &udf_aops; | |
199 | err = inode->i_data.a_ops->writepage(page, &udf_wbc); | |
200 | if (err) { | |
201 | /* Restore everything back so that we don't lose data... */ | |
202 | lock_page(page); | |
203 | kaddr = kmap(page); | |
204 | memcpy(iinfo->i_ext.i_data + iinfo->i_lenEAttr, kaddr, | |
205 | inode->i_size); | |
206 | kunmap(page); | |
207 | unlock_page(page); | |
208 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB; | |
209 | inode->i_data.a_ops = &udf_adinicb_aops; | |
210 | } | |
1da177e4 | 211 | page_cache_release(page); |
1da177e4 | 212 | mark_inode_dirty(inode); |
7e49b6f2 JK |
213 | |
214 | return err; | |
1da177e4 LT |
215 | } |
216 | ||
cb00ea35 CG |
217 | struct buffer_head *udf_expand_dir_adinicb(struct inode *inode, int *block, |
218 | int *err) | |
1da177e4 LT |
219 | { |
220 | int newblock; | |
ff116fc8 | 221 | struct buffer_head *dbh = NULL; |
5ca4e4be | 222 | struct kernel_lb_addr eloc; |
1da177e4 | 223 | uint8_t alloctype; |
ff116fc8 | 224 | struct extent_position epos; |
1da177e4 LT |
225 | |
226 | struct udf_fileident_bh sfibh, dfibh; | |
af793295 JK |
227 | loff_t f_pos = udf_ext0_offset(inode); |
228 | int size = udf_ext0_offset(inode) + inode->i_size; | |
1da177e4 | 229 | struct fileIdentDesc cfi, *sfi, *dfi; |
48d6d8ff | 230 | struct udf_inode_info *iinfo = UDF_I(inode); |
1da177e4 LT |
231 | |
232 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) | |
233 | alloctype = ICBTAG_FLAG_AD_SHORT; | |
234 | else | |
235 | alloctype = ICBTAG_FLAG_AD_LONG; | |
236 | ||
cb00ea35 | 237 | if (!inode->i_size) { |
48d6d8ff | 238 | iinfo->i_alloc_type = alloctype; |
1da177e4 LT |
239 | mark_inode_dirty(inode); |
240 | return NULL; | |
241 | } | |
242 | ||
243 | /* alloc block, and copy data to it */ | |
244 | *block = udf_new_block(inode->i_sb, inode, | |
48d6d8ff MS |
245 | iinfo->i_location.partitionReferenceNum, |
246 | iinfo->i_location.logicalBlockNum, err); | |
1da177e4 LT |
247 | if (!(*block)) |
248 | return NULL; | |
249 | newblock = udf_get_pblock(inode->i_sb, *block, | |
48d6d8ff | 250 | iinfo->i_location.partitionReferenceNum, |
c0b34438 | 251 | 0); |
1da177e4 LT |
252 | if (!newblock) |
253 | return NULL; | |
254 | dbh = udf_tgetblk(inode->i_sb, newblock); | |
255 | if (!dbh) | |
256 | return NULL; | |
257 | lock_buffer(dbh); | |
258 | memset(dbh->b_data, 0x00, inode->i_sb->s_blocksize); | |
259 | set_buffer_uptodate(dbh); | |
260 | unlock_buffer(dbh); | |
261 | mark_buffer_dirty_inode(dbh, inode); | |
262 | ||
4b11111a | 263 | sfibh.soffset = sfibh.eoffset = |
af793295 | 264 | f_pos & (inode->i_sb->s_blocksize - 1); |
ff116fc8 | 265 | sfibh.sbh = sfibh.ebh = NULL; |
1da177e4 LT |
266 | dfibh.soffset = dfibh.eoffset = 0; |
267 | dfibh.sbh = dfibh.ebh = dbh; | |
af793295 | 268 | while (f_pos < size) { |
48d6d8ff | 269 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB; |
4b11111a MS |
270 | sfi = udf_fileident_read(inode, &f_pos, &sfibh, &cfi, NULL, |
271 | NULL, NULL, NULL); | |
cb00ea35 | 272 | if (!sfi) { |
3bf25cb4 | 273 | brelse(dbh); |
1da177e4 LT |
274 | return NULL; |
275 | } | |
48d6d8ff | 276 | iinfo->i_alloc_type = alloctype; |
1da177e4 LT |
277 | sfi->descTag.tagLocation = cpu_to_le32(*block); |
278 | dfibh.soffset = dfibh.eoffset; | |
279 | dfibh.eoffset += (sfibh.eoffset - sfibh.soffset); | |
280 | dfi = (struct fileIdentDesc *)(dbh->b_data + dfibh.soffset); | |
281 | if (udf_write_fi(inode, sfi, dfi, &dfibh, sfi->impUse, | |
4b11111a MS |
282 | sfi->fileIdent + |
283 | le16_to_cpu(sfi->lengthOfImpUse))) { | |
48d6d8ff | 284 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB; |
3bf25cb4 | 285 | brelse(dbh); |
1da177e4 LT |
286 | return NULL; |
287 | } | |
288 | } | |
289 | mark_buffer_dirty_inode(dbh, inode); | |
290 | ||
48d6d8ff MS |
291 | memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr, 0, |
292 | iinfo->i_lenAlloc); | |
293 | iinfo->i_lenAlloc = 0; | |
1da177e4 | 294 | eloc.logicalBlockNum = *block; |
4b11111a | 295 | eloc.partitionReferenceNum = |
48d6d8ff | 296 | iinfo->i_location.partitionReferenceNum; |
2c948b3f | 297 | iinfo->i_lenExtents = inode->i_size; |
ff116fc8 | 298 | epos.bh = NULL; |
48d6d8ff | 299 | epos.block = iinfo->i_location; |
ff116fc8 | 300 | epos.offset = udf_file_entry_alloc_offset(inode); |
2c948b3f | 301 | udf_add_aext(inode, &epos, &eloc, inode->i_size, 0); |
1da177e4 LT |
302 | /* UniqueID stuff */ |
303 | ||
3bf25cb4 | 304 | brelse(epos.bh); |
1da177e4 LT |
305 | mark_inode_dirty(inode); |
306 | return dbh; | |
307 | } | |
308 | ||
cb00ea35 CG |
309 | static int udf_get_block(struct inode *inode, sector_t block, |
310 | struct buffer_head *bh_result, int create) | |
1da177e4 LT |
311 | { |
312 | int err, new; | |
313 | struct buffer_head *bh; | |
1ed16171 | 314 | sector_t phys = 0; |
48d6d8ff | 315 | struct udf_inode_info *iinfo; |
1da177e4 | 316 | |
cb00ea35 | 317 | if (!create) { |
1da177e4 LT |
318 | phys = udf_block_map(inode, block); |
319 | if (phys) | |
320 | map_bh(bh_result, inode->i_sb, phys); | |
321 | return 0; | |
322 | } | |
323 | ||
324 | err = -EIO; | |
325 | new = 0; | |
326 | bh = NULL; | |
48d6d8ff | 327 | iinfo = UDF_I(inode); |
4d0fb621 AIB |
328 | |
329 | down_write(&iinfo->i_data_sem); | |
48d6d8ff MS |
330 | if (block == iinfo->i_next_alloc_block + 1) { |
331 | iinfo->i_next_alloc_block++; | |
332 | iinfo->i_next_alloc_goal++; | |
1da177e4 LT |
333 | } |
334 | ||
335 | err = 0; | |
336 | ||
337 | bh = inode_getblk(inode, block, &err, &phys, &new); | |
2c2111c2 | 338 | BUG_ON(bh); |
1da177e4 LT |
339 | if (err) |
340 | goto abort; | |
2c2111c2 | 341 | BUG_ON(!phys); |
1da177e4 LT |
342 | |
343 | if (new) | |
344 | set_buffer_new(bh_result); | |
345 | map_bh(bh_result, inode->i_sb, phys); | |
28de7948 CG |
346 | |
347 | abort: | |
4d0fb621 | 348 | up_write(&iinfo->i_data_sem); |
1da177e4 | 349 | return err; |
1da177e4 LT |
350 | } |
351 | ||
cb00ea35 CG |
352 | static struct buffer_head *udf_getblk(struct inode *inode, long block, |
353 | int create, int *err) | |
1da177e4 | 354 | { |
28de7948 | 355 | struct buffer_head *bh; |
1da177e4 LT |
356 | struct buffer_head dummy; |
357 | ||
358 | dummy.b_state = 0; | |
359 | dummy.b_blocknr = -1000; | |
360 | *err = udf_get_block(inode, block, &dummy, create); | |
cb00ea35 | 361 | if (!*err && buffer_mapped(&dummy)) { |
1da177e4 | 362 | bh = sb_getblk(inode->i_sb, dummy.b_blocknr); |
cb00ea35 | 363 | if (buffer_new(&dummy)) { |
1da177e4 LT |
364 | lock_buffer(bh); |
365 | memset(bh->b_data, 0x00, inode->i_sb->s_blocksize); | |
366 | set_buffer_uptodate(bh); | |
367 | unlock_buffer(bh); | |
368 | mark_buffer_dirty_inode(bh, inode); | |
369 | } | |
370 | return bh; | |
371 | } | |
28de7948 | 372 | |
1da177e4 LT |
373 | return NULL; |
374 | } | |
375 | ||
31170b6a | 376 | /* Extend the file by 'blocks' blocks, return the number of extents added */ |
7e49b6f2 JK |
377 | static int udf_do_extend_file(struct inode *inode, |
378 | struct extent_position *last_pos, | |
379 | struct kernel_long_ad *last_ext, | |
380 | sector_t blocks) | |
31170b6a JK |
381 | { |
382 | sector_t add; | |
383 | int count = 0, fake = !(last_ext->extLength & UDF_EXTENT_LENGTH_MASK); | |
384 | struct super_block *sb = inode->i_sb; | |
5ca4e4be | 385 | struct kernel_lb_addr prealloc_loc = {}; |
31170b6a | 386 | int prealloc_len = 0; |
48d6d8ff | 387 | struct udf_inode_info *iinfo; |
7e49b6f2 | 388 | int err; |
31170b6a JK |
389 | |
390 | /* The previous extent is fake and we should not extend by anything | |
391 | * - there's nothing to do... */ | |
392 | if (!blocks && fake) | |
393 | return 0; | |
28de7948 | 394 | |
48d6d8ff | 395 | iinfo = UDF_I(inode); |
31170b6a JK |
396 | /* Round the last extent up to a multiple of block size */ |
397 | if (last_ext->extLength & (sb->s_blocksize - 1)) { | |
398 | last_ext->extLength = | |
28de7948 CG |
399 | (last_ext->extLength & UDF_EXTENT_FLAG_MASK) | |
400 | (((last_ext->extLength & UDF_EXTENT_LENGTH_MASK) + | |
401 | sb->s_blocksize - 1) & ~(sb->s_blocksize - 1)); | |
48d6d8ff MS |
402 | iinfo->i_lenExtents = |
403 | (iinfo->i_lenExtents + sb->s_blocksize - 1) & | |
28de7948 | 404 | ~(sb->s_blocksize - 1); |
31170b6a | 405 | } |
28de7948 | 406 | |
31170b6a | 407 | /* Last extent are just preallocated blocks? */ |
4b11111a MS |
408 | if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) == |
409 | EXT_NOT_RECORDED_ALLOCATED) { | |
31170b6a JK |
410 | /* Save the extent so that we can reattach it to the end */ |
411 | prealloc_loc = last_ext->extLocation; | |
412 | prealloc_len = last_ext->extLength; | |
413 | /* Mark the extent as a hole */ | |
414 | last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | | |
28de7948 | 415 | (last_ext->extLength & UDF_EXTENT_LENGTH_MASK); |
31170b6a | 416 | last_ext->extLocation.logicalBlockNum = 0; |
4b11111a | 417 | last_ext->extLocation.partitionReferenceNum = 0; |
31170b6a | 418 | } |
28de7948 | 419 | |
31170b6a | 420 | /* Can we merge with the previous extent? */ |
4b11111a MS |
421 | if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) == |
422 | EXT_NOT_RECORDED_NOT_ALLOCATED) { | |
423 | add = ((1 << 30) - sb->s_blocksize - | |
424 | (last_ext->extLength & UDF_EXTENT_LENGTH_MASK)) >> | |
425 | sb->s_blocksize_bits; | |
31170b6a JK |
426 | if (add > blocks) |
427 | add = blocks; | |
428 | blocks -= add; | |
429 | last_ext->extLength += add << sb->s_blocksize_bits; | |
430 | } | |
431 | ||
432 | if (fake) { | |
97e961fd | 433 | udf_add_aext(inode, last_pos, &last_ext->extLocation, |
cb00ea35 | 434 | last_ext->extLength, 1); |
31170b6a | 435 | count++; |
4b11111a | 436 | } else |
97e961fd | 437 | udf_write_aext(inode, last_pos, &last_ext->extLocation, |
4b11111a | 438 | last_ext->extLength, 1); |
28de7948 | 439 | |
31170b6a JK |
440 | /* Managed to do everything necessary? */ |
441 | if (!blocks) | |
442 | goto out; | |
443 | ||
444 | /* All further extents will be NOT_RECORDED_NOT_ALLOCATED */ | |
445 | last_ext->extLocation.logicalBlockNum = 0; | |
4b11111a | 446 | last_ext->extLocation.partitionReferenceNum = 0; |
28de7948 | 447 | add = (1 << (30-sb->s_blocksize_bits)) - 1; |
4b11111a MS |
448 | last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | |
449 | (add << sb->s_blocksize_bits); | |
28de7948 | 450 | |
31170b6a JK |
451 | /* Create enough extents to cover the whole hole */ |
452 | while (blocks > add) { | |
453 | blocks -= add; | |
7e49b6f2 JK |
454 | err = udf_add_aext(inode, last_pos, &last_ext->extLocation, |
455 | last_ext->extLength, 1); | |
456 | if (err) | |
457 | return err; | |
31170b6a JK |
458 | count++; |
459 | } | |
460 | if (blocks) { | |
461 | last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | | |
28de7948 | 462 | (blocks << sb->s_blocksize_bits); |
7e49b6f2 JK |
463 | err = udf_add_aext(inode, last_pos, &last_ext->extLocation, |
464 | last_ext->extLength, 1); | |
465 | if (err) | |
466 | return err; | |
31170b6a JK |
467 | count++; |
468 | } | |
28de7948 CG |
469 | |
470 | out: | |
31170b6a JK |
471 | /* Do we have some preallocated blocks saved? */ |
472 | if (prealloc_len) { | |
7e49b6f2 JK |
473 | err = udf_add_aext(inode, last_pos, &prealloc_loc, |
474 | prealloc_len, 1); | |
475 | if (err) | |
476 | return err; | |
31170b6a JK |
477 | last_ext->extLocation = prealloc_loc; |
478 | last_ext->extLength = prealloc_len; | |
479 | count++; | |
480 | } | |
28de7948 | 481 | |
31170b6a | 482 | /* last_pos should point to the last written extent... */ |
48d6d8ff | 483 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
5ca4e4be | 484 | last_pos->offset -= sizeof(struct short_ad); |
48d6d8ff | 485 | else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
5ca4e4be | 486 | last_pos->offset -= sizeof(struct long_ad); |
31170b6a | 487 | else |
7e49b6f2 | 488 | return -EIO; |
28de7948 | 489 | |
31170b6a JK |
490 | return count; |
491 | } | |
492 | ||
7e49b6f2 JK |
493 | static int udf_extend_file(struct inode *inode, loff_t newsize) |
494 | { | |
495 | ||
496 | struct extent_position epos; | |
497 | struct kernel_lb_addr eloc; | |
498 | uint32_t elen; | |
499 | int8_t etype; | |
500 | struct super_block *sb = inode->i_sb; | |
501 | sector_t first_block = newsize >> sb->s_blocksize_bits, offset; | |
502 | int adsize; | |
503 | struct udf_inode_info *iinfo = UDF_I(inode); | |
504 | struct kernel_long_ad extent; | |
505 | int err; | |
506 | ||
507 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) | |
508 | adsize = sizeof(struct short_ad); | |
509 | else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) | |
510 | adsize = sizeof(struct long_ad); | |
511 | else | |
512 | BUG(); | |
513 | ||
514 | etype = inode_bmap(inode, first_block, &epos, &eloc, &elen, &offset); | |
515 | ||
516 | /* File has extent covering the new size (could happen when extending | |
517 | * inside a block)? */ | |
518 | if (etype != -1) | |
519 | return 0; | |
520 | if (newsize & (sb->s_blocksize - 1)) | |
521 | offset++; | |
522 | /* Extended file just to the boundary of the last file block? */ | |
523 | if (offset == 0) | |
524 | return 0; | |
525 | ||
526 | /* Truncate is extending the file by 'offset' blocks */ | |
527 | if ((!epos.bh && epos.offset == udf_file_entry_alloc_offset(inode)) || | |
528 | (epos.bh && epos.offset == sizeof(struct allocExtDesc))) { | |
529 | /* File has no extents at all or has empty last | |
530 | * indirect extent! Create a fake extent... */ | |
531 | extent.extLocation.logicalBlockNum = 0; | |
532 | extent.extLocation.partitionReferenceNum = 0; | |
533 | extent.extLength = EXT_NOT_RECORDED_NOT_ALLOCATED; | |
534 | } else { | |
535 | epos.offset -= adsize; | |
536 | etype = udf_next_aext(inode, &epos, &extent.extLocation, | |
537 | &extent.extLength, 0); | |
538 | extent.extLength |= etype << 30; | |
539 | } | |
540 | err = udf_do_extend_file(inode, &epos, &extent, offset); | |
541 | if (err < 0) | |
542 | goto out; | |
543 | err = 0; | |
544 | iinfo->i_lenExtents = newsize; | |
545 | out: | |
546 | brelse(epos.bh); | |
547 | return err; | |
548 | } | |
549 | ||
cb00ea35 | 550 | static struct buffer_head *inode_getblk(struct inode *inode, sector_t block, |
1ed16171 | 551 | int *err, sector_t *phys, int *new) |
1da177e4 | 552 | { |
31170b6a | 553 | static sector_t last_block; |
ff116fc8 | 554 | struct buffer_head *result = NULL; |
5ca4e4be | 555 | struct kernel_long_ad laarr[EXTENT_MERGE_SIZE]; |
ff116fc8 | 556 | struct extent_position prev_epos, cur_epos, next_epos; |
1da177e4 | 557 | int count = 0, startnum = 0, endnum = 0; |
85d71244 | 558 | uint32_t elen = 0, tmpelen; |
5ca4e4be | 559 | struct kernel_lb_addr eloc, tmpeloc; |
1da177e4 | 560 | int c = 1; |
60448b1d JK |
561 | loff_t lbcount = 0, b_off = 0; |
562 | uint32_t newblocknum, newblock; | |
563 | sector_t offset = 0; | |
1da177e4 | 564 | int8_t etype; |
48d6d8ff MS |
565 | struct udf_inode_info *iinfo = UDF_I(inode); |
566 | int goal = 0, pgoal = iinfo->i_location.logicalBlockNum; | |
31170b6a | 567 | int lastblock = 0; |
1da177e4 | 568 | |
ff116fc8 | 569 | prev_epos.offset = udf_file_entry_alloc_offset(inode); |
48d6d8ff | 570 | prev_epos.block = iinfo->i_location; |
ff116fc8 JK |
571 | prev_epos.bh = NULL; |
572 | cur_epos = next_epos = prev_epos; | |
28de7948 | 573 | b_off = (loff_t)block << inode->i_sb->s_blocksize_bits; |
1da177e4 LT |
574 | |
575 | /* find the extent which contains the block we are looking for. | |
cb00ea35 CG |
576 | alternate between laarr[0] and laarr[1] for locations of the |
577 | current extent, and the previous extent */ | |
578 | do { | |
579 | if (prev_epos.bh != cur_epos.bh) { | |
3bf25cb4 JK |
580 | brelse(prev_epos.bh); |
581 | get_bh(cur_epos.bh); | |
ff116fc8 | 582 | prev_epos.bh = cur_epos.bh; |
1da177e4 | 583 | } |
cb00ea35 | 584 | if (cur_epos.bh != next_epos.bh) { |
3bf25cb4 JK |
585 | brelse(cur_epos.bh); |
586 | get_bh(next_epos.bh); | |
ff116fc8 | 587 | cur_epos.bh = next_epos.bh; |
1da177e4 LT |
588 | } |
589 | ||
590 | lbcount += elen; | |
591 | ||
ff116fc8 JK |
592 | prev_epos.block = cur_epos.block; |
593 | cur_epos.block = next_epos.block; | |
1da177e4 | 594 | |
ff116fc8 JK |
595 | prev_epos.offset = cur_epos.offset; |
596 | cur_epos.offset = next_epos.offset; | |
1da177e4 | 597 | |
4b11111a MS |
598 | etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 1); |
599 | if (etype == -1) | |
1da177e4 LT |
600 | break; |
601 | ||
602 | c = !c; | |
603 | ||
604 | laarr[c].extLength = (etype << 30) | elen; | |
605 | laarr[c].extLocation = eloc; | |
606 | ||
607 | if (etype != (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) | |
608 | pgoal = eloc.logicalBlockNum + | |
28de7948 CG |
609 | ((elen + inode->i_sb->s_blocksize - 1) >> |
610 | inode->i_sb->s_blocksize_bits); | |
1da177e4 | 611 | |
cb00ea35 | 612 | count++; |
1da177e4 LT |
613 | } while (lbcount + elen <= b_off); |
614 | ||
615 | b_off -= lbcount; | |
616 | offset = b_off >> inode->i_sb->s_blocksize_bits; | |
85d71244 JK |
617 | /* |
618 | * Move prev_epos and cur_epos into indirect extent if we are at | |
619 | * the pointer to it | |
620 | */ | |
621 | udf_next_aext(inode, &prev_epos, &tmpeloc, &tmpelen, 0); | |
622 | udf_next_aext(inode, &cur_epos, &tmpeloc, &tmpelen, 0); | |
1da177e4 LT |
623 | |
624 | /* if the extent is allocated and recorded, return the block | |
cb00ea35 | 625 | if the extent is not a multiple of the blocksize, round up */ |
1da177e4 | 626 | |
cb00ea35 CG |
627 | if (etype == (EXT_RECORDED_ALLOCATED >> 30)) { |
628 | if (elen & (inode->i_sb->s_blocksize - 1)) { | |
1da177e4 | 629 | elen = EXT_RECORDED_ALLOCATED | |
28de7948 CG |
630 | ((elen + inode->i_sb->s_blocksize - 1) & |
631 | ~(inode->i_sb->s_blocksize - 1)); | |
7e49b6f2 | 632 | udf_write_aext(inode, &cur_epos, &eloc, elen, 1); |
1da177e4 | 633 | } |
3bf25cb4 JK |
634 | brelse(prev_epos.bh); |
635 | brelse(cur_epos.bh); | |
636 | brelse(next_epos.bh); | |
97e961fd | 637 | newblock = udf_get_lb_pblock(inode->i_sb, &eloc, offset); |
1da177e4 LT |
638 | *phys = newblock; |
639 | return NULL; | |
640 | } | |
641 | ||
31170b6a JK |
642 | last_block = block; |
643 | /* Are we beyond EOF? */ | |
cb00ea35 | 644 | if (etype == -1) { |
31170b6a JK |
645 | int ret; |
646 | ||
647 | if (count) { | |
648 | if (c) | |
649 | laarr[0] = laarr[1]; | |
650 | startnum = 1; | |
cb00ea35 | 651 | } else { |
31170b6a | 652 | /* Create a fake extent when there's not one */ |
4b11111a | 653 | memset(&laarr[0].extLocation, 0x00, |
5ca4e4be | 654 | sizeof(struct kernel_lb_addr)); |
31170b6a | 655 | laarr[0].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED; |
7e49b6f2 | 656 | /* Will udf_do_extend_file() create real extent from |
4b11111a | 657 | a fake one? */ |
31170b6a JK |
658 | startnum = (offset > 0); |
659 | } | |
660 | /* Create extents for the hole between EOF and offset */ | |
7e49b6f2 JK |
661 | ret = udf_do_extend_file(inode, &prev_epos, laarr, offset); |
662 | if (ret < 0) { | |
31170b6a JK |
663 | brelse(prev_epos.bh); |
664 | brelse(cur_epos.bh); | |
665 | brelse(next_epos.bh); | |
7e49b6f2 | 666 | *err = ret; |
31170b6a JK |
667 | return NULL; |
668 | } | |
669 | c = 0; | |
670 | offset = 0; | |
671 | count += ret; | |
672 | /* We are not covered by a preallocated extent? */ | |
4b11111a MS |
673 | if ((laarr[0].extLength & UDF_EXTENT_FLAG_MASK) != |
674 | EXT_NOT_RECORDED_ALLOCATED) { | |
31170b6a JK |
675 | /* Is there any real extent? - otherwise we overwrite |
676 | * the fake one... */ | |
677 | if (count) | |
678 | c = !c; | |
679 | laarr[c].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | | |
28de7948 | 680 | inode->i_sb->s_blocksize; |
4b11111a | 681 | memset(&laarr[c].extLocation, 0x00, |
5ca4e4be | 682 | sizeof(struct kernel_lb_addr)); |
cb00ea35 CG |
683 | count++; |
684 | endnum++; | |
31170b6a | 685 | } |
cb00ea35 | 686 | endnum = c + 1; |
1da177e4 | 687 | lastblock = 1; |
cb00ea35 | 688 | } else { |
1da177e4 LT |
689 | endnum = startnum = ((count > 2) ? 2 : count); |
690 | ||
4b11111a MS |
691 | /* if the current extent is in position 0, |
692 | swap it with the previous */ | |
cb00ea35 | 693 | if (!c && count != 1) { |
31170b6a JK |
694 | laarr[2] = laarr[0]; |
695 | laarr[0] = laarr[1]; | |
696 | laarr[1] = laarr[2]; | |
697 | c = 1; | |
698 | } | |
1da177e4 | 699 | |
4b11111a MS |
700 | /* if the current block is located in an extent, |
701 | read the next extent */ | |
702 | etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 0); | |
703 | if (etype != -1) { | |
cb00ea35 CG |
704 | laarr[c + 1].extLength = (etype << 30) | elen; |
705 | laarr[c + 1].extLocation = eloc; | |
706 | count++; | |
707 | startnum++; | |
708 | endnum++; | |
4b11111a | 709 | } else |
1da177e4 LT |
710 | lastblock = 1; |
711 | } | |
1da177e4 LT |
712 | |
713 | /* if the current extent is not recorded but allocated, get the | |
28de7948 | 714 | * block in the extent corresponding to the requested block */ |
4b11111a | 715 | if ((laarr[c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30)) |
1da177e4 | 716 | newblocknum = laarr[c].extLocation.logicalBlockNum + offset; |
4b11111a | 717 | else { /* otherwise, allocate a new block */ |
48d6d8ff MS |
718 | if (iinfo->i_next_alloc_block == block) |
719 | goal = iinfo->i_next_alloc_goal; | |
1da177e4 | 720 | |
cb00ea35 | 721 | if (!goal) { |
4b11111a | 722 | if (!(goal = pgoal)) /* XXX: what was intended here? */ |
48d6d8ff | 723 | goal = iinfo->i_location.logicalBlockNum + 1; |
1da177e4 LT |
724 | } |
725 | ||
4b11111a | 726 | newblocknum = udf_new_block(inode->i_sb, inode, |
48d6d8ff | 727 | iinfo->i_location.partitionReferenceNum, |
4b11111a MS |
728 | goal, err); |
729 | if (!newblocknum) { | |
3bf25cb4 | 730 | brelse(prev_epos.bh); |
1da177e4 LT |
731 | *err = -ENOSPC; |
732 | return NULL; | |
733 | } | |
48d6d8ff | 734 | iinfo->i_lenExtents += inode->i_sb->s_blocksize; |
1da177e4 LT |
735 | } |
736 | ||
4b11111a MS |
737 | /* if the extent the requsted block is located in contains multiple |
738 | * blocks, split the extent into at most three extents. blocks prior | |
739 | * to requested block, requested block, and blocks after requested | |
740 | * block */ | |
1da177e4 LT |
741 | udf_split_extents(inode, &c, offset, newblocknum, laarr, &endnum); |
742 | ||
743 | #ifdef UDF_PREALLOCATE | |
81056dd0 JK |
744 | /* We preallocate blocks only for regular files. It also makes sense |
745 | * for directories but there's a problem when to drop the | |
746 | * preallocation. We might use some delayed work for that but I feel | |
747 | * it's overengineering for a filesystem like UDF. */ | |
748 | if (S_ISREG(inode->i_mode)) | |
749 | udf_prealloc_extents(inode, c, lastblock, laarr, &endnum); | |
1da177e4 LT |
750 | #endif |
751 | ||
752 | /* merge any continuous blocks in laarr */ | |
753 | udf_merge_extents(inode, laarr, &endnum); | |
754 | ||
755 | /* write back the new extents, inserting new extents if the new number | |
28de7948 CG |
756 | * of extents is greater than the old number, and deleting extents if |
757 | * the new number of extents is less than the old number */ | |
ff116fc8 | 758 | udf_update_extents(inode, laarr, startnum, endnum, &prev_epos); |
1da177e4 | 759 | |
3bf25cb4 | 760 | brelse(prev_epos.bh); |
1da177e4 | 761 | |
4b11111a | 762 | newblock = udf_get_pblock(inode->i_sb, newblocknum, |
48d6d8ff | 763 | iinfo->i_location.partitionReferenceNum, 0); |
4b11111a | 764 | if (!newblock) |
1da177e4 | 765 | return NULL; |
1da177e4 LT |
766 | *phys = newblock; |
767 | *err = 0; | |
768 | *new = 1; | |
48d6d8ff MS |
769 | iinfo->i_next_alloc_block = block; |
770 | iinfo->i_next_alloc_goal = newblocknum; | |
1da177e4 LT |
771 | inode->i_ctime = current_fs_time(inode->i_sb); |
772 | ||
773 | if (IS_SYNC(inode)) | |
774 | udf_sync_inode(inode); | |
775 | else | |
776 | mark_inode_dirty(inode); | |
28de7948 | 777 | |
1da177e4 LT |
778 | return result; |
779 | } | |
780 | ||
cb00ea35 CG |
781 | static void udf_split_extents(struct inode *inode, int *c, int offset, |
782 | int newblocknum, | |
5ca4e4be | 783 | struct kernel_long_ad laarr[EXTENT_MERGE_SIZE], |
cb00ea35 | 784 | int *endnum) |
1da177e4 | 785 | { |
4b11111a MS |
786 | unsigned long blocksize = inode->i_sb->s_blocksize; |
787 | unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; | |
788 | ||
1da177e4 | 789 | if ((laarr[*c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30) || |
4b11111a MS |
790 | (laarr[*c].extLength >> 30) == |
791 | (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) { | |
1da177e4 LT |
792 | int curr = *c; |
793 | int blen = ((laarr[curr].extLength & UDF_EXTENT_LENGTH_MASK) + | |
4b11111a | 794 | blocksize - 1) >> blocksize_bits; |
1da177e4 LT |
795 | int8_t etype = (laarr[curr].extLength >> 30); |
796 | ||
4b11111a | 797 | if (blen == 1) |
28de7948 | 798 | ; |
4b11111a | 799 | else if (!offset || blen == offset + 1) { |
cb00ea35 CG |
800 | laarr[curr + 2] = laarr[curr + 1]; |
801 | laarr[curr + 1] = laarr[curr]; | |
802 | } else { | |
803 | laarr[curr + 3] = laarr[curr + 1]; | |
804 | laarr[curr + 2] = laarr[curr + 1] = laarr[curr]; | |
805 | } | |
806 | ||
807 | if (offset) { | |
808 | if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30)) { | |
4b11111a | 809 | udf_free_blocks(inode->i_sb, inode, |
97e961fd | 810 | &laarr[curr].extLocation, |
4b11111a MS |
811 | 0, offset); |
812 | laarr[curr].extLength = | |
813 | EXT_NOT_RECORDED_NOT_ALLOCATED | | |
814 | (offset << blocksize_bits); | |
1da177e4 | 815 | laarr[curr].extLocation.logicalBlockNum = 0; |
4b11111a MS |
816 | laarr[curr].extLocation. |
817 | partitionReferenceNum = 0; | |
818 | } else | |
1da177e4 | 819 | laarr[curr].extLength = (etype << 30) | |
4b11111a | 820 | (offset << blocksize_bits); |
cb00ea35 CG |
821 | curr++; |
822 | (*c)++; | |
823 | (*endnum)++; | |
1da177e4 | 824 | } |
647bd61a | 825 | |
1da177e4 LT |
826 | laarr[curr].extLocation.logicalBlockNum = newblocknum; |
827 | if (etype == (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) | |
828 | laarr[curr].extLocation.partitionReferenceNum = | |
c0b34438 | 829 | UDF_I(inode)->i_location.partitionReferenceNum; |
1da177e4 | 830 | laarr[curr].extLength = EXT_RECORDED_ALLOCATED | |
4b11111a | 831 | blocksize; |
cb00ea35 | 832 | curr++; |
1da177e4 | 833 | |
cb00ea35 | 834 | if (blen != offset + 1) { |
1da177e4 | 835 | if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30)) |
4b11111a MS |
836 | laarr[curr].extLocation.logicalBlockNum += |
837 | offset + 1; | |
28de7948 | 838 | laarr[curr].extLength = (etype << 30) | |
4b11111a | 839 | ((blen - (offset + 1)) << blocksize_bits); |
cb00ea35 CG |
840 | curr++; |
841 | (*endnum)++; | |
1da177e4 LT |
842 | } |
843 | } | |
844 | } | |
845 | ||
846 | static void udf_prealloc_extents(struct inode *inode, int c, int lastblock, | |
5ca4e4be | 847 | struct kernel_long_ad laarr[EXTENT_MERGE_SIZE], |
cb00ea35 | 848 | int *endnum) |
1da177e4 LT |
849 | { |
850 | int start, length = 0, currlength = 0, i; | |
851 | ||
cb00ea35 | 852 | if (*endnum >= (c + 1)) { |
1da177e4 LT |
853 | if (!lastblock) |
854 | return; | |
855 | else | |
856 | start = c; | |
cb00ea35 | 857 | } else { |
4b11111a MS |
858 | if ((laarr[c + 1].extLength >> 30) == |
859 | (EXT_NOT_RECORDED_ALLOCATED >> 30)) { | |
cb00ea35 | 860 | start = c + 1; |
4b11111a MS |
861 | length = currlength = |
862 | (((laarr[c + 1].extLength & | |
863 | UDF_EXTENT_LENGTH_MASK) + | |
864 | inode->i_sb->s_blocksize - 1) >> | |
865 | inode->i_sb->s_blocksize_bits); | |
866 | } else | |
1da177e4 LT |
867 | start = c; |
868 | } | |
869 | ||
cb00ea35 CG |
870 | for (i = start + 1; i <= *endnum; i++) { |
871 | if (i == *endnum) { | |
1da177e4 LT |
872 | if (lastblock) |
873 | length += UDF_DEFAULT_PREALLOC_BLOCKS; | |
4b11111a MS |
874 | } else if ((laarr[i].extLength >> 30) == |
875 | (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) { | |
876 | length += (((laarr[i].extLength & | |
877 | UDF_EXTENT_LENGTH_MASK) + | |
878 | inode->i_sb->s_blocksize - 1) >> | |
879 | inode->i_sb->s_blocksize_bits); | |
880 | } else | |
1da177e4 LT |
881 | break; |
882 | } | |
883 | ||
cb00ea35 | 884 | if (length) { |
1da177e4 | 885 | int next = laarr[start].extLocation.logicalBlockNum + |
28de7948 | 886 | (((laarr[start].extLength & UDF_EXTENT_LENGTH_MASK) + |
4b11111a MS |
887 | inode->i_sb->s_blocksize - 1) >> |
888 | inode->i_sb->s_blocksize_bits); | |
1da177e4 | 889 | int numalloc = udf_prealloc_blocks(inode->i_sb, inode, |
4b11111a MS |
890 | laarr[start].extLocation.partitionReferenceNum, |
891 | next, (UDF_DEFAULT_PREALLOC_BLOCKS > length ? | |
892 | length : UDF_DEFAULT_PREALLOC_BLOCKS) - | |
893 | currlength); | |
28de7948 | 894 | if (numalloc) { |
4b11111a | 895 | if (start == (c + 1)) |
1da177e4 | 896 | laarr[start].extLength += |
4b11111a MS |
897 | (numalloc << |
898 | inode->i_sb->s_blocksize_bits); | |
899 | else { | |
cb00ea35 | 900 | memmove(&laarr[c + 2], &laarr[c + 1], |
5ca4e4be | 901 | sizeof(struct long_ad) * (*endnum - (c + 1))); |
cb00ea35 CG |
902 | (*endnum)++; |
903 | laarr[c + 1].extLocation.logicalBlockNum = next; | |
904 | laarr[c + 1].extLocation.partitionReferenceNum = | |
4b11111a MS |
905 | laarr[c].extLocation. |
906 | partitionReferenceNum; | |
907 | laarr[c + 1].extLength = | |
908 | EXT_NOT_RECORDED_ALLOCATED | | |
909 | (numalloc << | |
910 | inode->i_sb->s_blocksize_bits); | |
cb00ea35 | 911 | start = c + 1; |
1da177e4 LT |
912 | } |
913 | ||
cb00ea35 | 914 | for (i = start + 1; numalloc && i < *endnum; i++) { |
4b11111a MS |
915 | int elen = ((laarr[i].extLength & |
916 | UDF_EXTENT_LENGTH_MASK) + | |
917 | inode->i_sb->s_blocksize - 1) >> | |
918 | inode->i_sb->s_blocksize_bits; | |
1da177e4 | 919 | |
cb00ea35 | 920 | if (elen > numalloc) { |
1da177e4 | 921 | laarr[i].extLength -= |
4b11111a MS |
922 | (numalloc << |
923 | inode->i_sb->s_blocksize_bits); | |
1da177e4 | 924 | numalloc = 0; |
cb00ea35 | 925 | } else { |
1da177e4 | 926 | numalloc -= elen; |
cb00ea35 | 927 | if (*endnum > (i + 1)) |
4b11111a MS |
928 | memmove(&laarr[i], |
929 | &laarr[i + 1], | |
5ca4e4be | 930 | sizeof(struct long_ad) * |
4b11111a | 931 | (*endnum - (i + 1))); |
cb00ea35 CG |
932 | i--; |
933 | (*endnum)--; | |
1da177e4 LT |
934 | } |
935 | } | |
c0b34438 | 936 | UDF_I(inode)->i_lenExtents += |
4b11111a | 937 | numalloc << inode->i_sb->s_blocksize_bits; |
1da177e4 LT |
938 | } |
939 | } | |
940 | } | |
941 | ||
942 | static void udf_merge_extents(struct inode *inode, | |
5ca4e4be | 943 | struct kernel_long_ad laarr[EXTENT_MERGE_SIZE], |
cb00ea35 | 944 | int *endnum) |
1da177e4 LT |
945 | { |
946 | int i; | |
4b11111a MS |
947 | unsigned long blocksize = inode->i_sb->s_blocksize; |
948 | unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; | |
1da177e4 | 949 | |
cb00ea35 | 950 | for (i = 0; i < (*endnum - 1); i++) { |
5ca4e4be PE |
951 | struct kernel_long_ad *li /*l[i]*/ = &laarr[i]; |
952 | struct kernel_long_ad *lip1 /*l[i plus 1]*/ = &laarr[i + 1]; | |
4b11111a MS |
953 | |
954 | if (((li->extLength >> 30) == (lip1->extLength >> 30)) && | |
955 | (((li->extLength >> 30) == | |
956 | (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) || | |
957 | ((lip1->extLocation.logicalBlockNum - | |
958 | li->extLocation.logicalBlockNum) == | |
959 | (((li->extLength & UDF_EXTENT_LENGTH_MASK) + | |
960 | blocksize - 1) >> blocksize_bits)))) { | |
961 | ||
962 | if (((li->extLength & UDF_EXTENT_LENGTH_MASK) + | |
963 | (lip1->extLength & UDF_EXTENT_LENGTH_MASK) + | |
964 | blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) { | |
965 | lip1->extLength = (lip1->extLength - | |
966 | (li->extLength & | |
967 | UDF_EXTENT_LENGTH_MASK) + | |
968 | UDF_EXTENT_LENGTH_MASK) & | |
969 | ~(blocksize - 1); | |
970 | li->extLength = (li->extLength & | |
971 | UDF_EXTENT_FLAG_MASK) + | |
972 | (UDF_EXTENT_LENGTH_MASK + 1) - | |
973 | blocksize; | |
974 | lip1->extLocation.logicalBlockNum = | |
975 | li->extLocation.logicalBlockNum + | |
976 | ((li->extLength & | |
977 | UDF_EXTENT_LENGTH_MASK) >> | |
978 | blocksize_bits); | |
979 | } else { | |
980 | li->extLength = lip1->extLength + | |
981 | (((li->extLength & | |
982 | UDF_EXTENT_LENGTH_MASK) + | |
983 | blocksize - 1) & ~(blocksize - 1)); | |
984 | if (*endnum > (i + 2)) | |
985 | memmove(&laarr[i + 1], &laarr[i + 2], | |
5ca4e4be | 986 | sizeof(struct long_ad) * |
4b11111a MS |
987 | (*endnum - (i + 2))); |
988 | i--; | |
989 | (*endnum)--; | |
1da177e4 | 990 | } |
4b11111a MS |
991 | } else if (((li->extLength >> 30) == |
992 | (EXT_NOT_RECORDED_ALLOCATED >> 30)) && | |
993 | ((lip1->extLength >> 30) == | |
994 | (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))) { | |
97e961fd | 995 | udf_free_blocks(inode->i_sb, inode, &li->extLocation, 0, |
4b11111a MS |
996 | ((li->extLength & |
997 | UDF_EXTENT_LENGTH_MASK) + | |
998 | blocksize - 1) >> blocksize_bits); | |
999 | li->extLocation.logicalBlockNum = 0; | |
1000 | li->extLocation.partitionReferenceNum = 0; | |
1001 | ||
1002 | if (((li->extLength & UDF_EXTENT_LENGTH_MASK) + | |
1003 | (lip1->extLength & UDF_EXTENT_LENGTH_MASK) + | |
1004 | blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) { | |
1005 | lip1->extLength = (lip1->extLength - | |
1006 | (li->extLength & | |
1007 | UDF_EXTENT_LENGTH_MASK) + | |
1008 | UDF_EXTENT_LENGTH_MASK) & | |
1009 | ~(blocksize - 1); | |
1010 | li->extLength = (li->extLength & | |
1011 | UDF_EXTENT_FLAG_MASK) + | |
1012 | (UDF_EXTENT_LENGTH_MASK + 1) - | |
1013 | blocksize; | |
cb00ea35 | 1014 | } else { |
4b11111a MS |
1015 | li->extLength = lip1->extLength + |
1016 | (((li->extLength & | |
1017 | UDF_EXTENT_LENGTH_MASK) + | |
1018 | blocksize - 1) & ~(blocksize - 1)); | |
cb00ea35 CG |
1019 | if (*endnum > (i + 2)) |
1020 | memmove(&laarr[i + 1], &laarr[i + 2], | |
5ca4e4be | 1021 | sizeof(struct long_ad) * |
4b11111a | 1022 | (*endnum - (i + 2))); |
cb00ea35 CG |
1023 | i--; |
1024 | (*endnum)--; | |
1da177e4 | 1025 | } |
4b11111a MS |
1026 | } else if ((li->extLength >> 30) == |
1027 | (EXT_NOT_RECORDED_ALLOCATED >> 30)) { | |
1028 | udf_free_blocks(inode->i_sb, inode, | |
97e961fd | 1029 | &li->extLocation, 0, |
4b11111a MS |
1030 | ((li->extLength & |
1031 | UDF_EXTENT_LENGTH_MASK) + | |
1032 | blocksize - 1) >> blocksize_bits); | |
1033 | li->extLocation.logicalBlockNum = 0; | |
1034 | li->extLocation.partitionReferenceNum = 0; | |
1035 | li->extLength = (li->extLength & | |
1036 | UDF_EXTENT_LENGTH_MASK) | | |
1037 | EXT_NOT_RECORDED_NOT_ALLOCATED; | |
1da177e4 LT |
1038 | } |
1039 | } | |
1040 | } | |
1041 | ||
1042 | static void udf_update_extents(struct inode *inode, | |
5ca4e4be | 1043 | struct kernel_long_ad laarr[EXTENT_MERGE_SIZE], |
cb00ea35 CG |
1044 | int startnum, int endnum, |
1045 | struct extent_position *epos) | |
1da177e4 LT |
1046 | { |
1047 | int start = 0, i; | |
5ca4e4be | 1048 | struct kernel_lb_addr tmploc; |
1da177e4 LT |
1049 | uint32_t tmplen; |
1050 | ||
cb00ea35 CG |
1051 | if (startnum > endnum) { |
1052 | for (i = 0; i < (startnum - endnum); i++) | |
ff116fc8 | 1053 | udf_delete_aext(inode, *epos, laarr[i].extLocation, |
cb00ea35 CG |
1054 | laarr[i].extLength); |
1055 | } else if (startnum < endnum) { | |
1056 | for (i = 0; i < (endnum - startnum); i++) { | |
ff116fc8 | 1057 | udf_insert_aext(inode, *epos, laarr[i].extLocation, |
cb00ea35 | 1058 | laarr[i].extLength); |
ff116fc8 | 1059 | udf_next_aext(inode, epos, &laarr[i].extLocation, |
cb00ea35 CG |
1060 | &laarr[i].extLength, 1); |
1061 | start++; | |
1da177e4 LT |
1062 | } |
1063 | } | |
1064 | ||
cb00ea35 | 1065 | for (i = start; i < endnum; i++) { |
ff116fc8 | 1066 | udf_next_aext(inode, epos, &tmploc, &tmplen, 0); |
97e961fd | 1067 | udf_write_aext(inode, epos, &laarr[i].extLocation, |
cb00ea35 | 1068 | laarr[i].extLength, 1); |
1da177e4 LT |
1069 | } |
1070 | } | |
1071 | ||
cb00ea35 CG |
1072 | struct buffer_head *udf_bread(struct inode *inode, int block, |
1073 | int create, int *err) | |
1da177e4 | 1074 | { |
cb00ea35 | 1075 | struct buffer_head *bh = NULL; |
1da177e4 LT |
1076 | |
1077 | bh = udf_getblk(inode, block, create, err); | |
1078 | if (!bh) | |
1079 | return NULL; | |
1080 | ||
1081 | if (buffer_uptodate(bh)) | |
1082 | return bh; | |
28de7948 | 1083 | |
1da177e4 | 1084 | ll_rw_block(READ, 1, &bh); |
28de7948 | 1085 | |
1da177e4 LT |
1086 | wait_on_buffer(bh); |
1087 | if (buffer_uptodate(bh)) | |
1088 | return bh; | |
28de7948 | 1089 | |
1da177e4 LT |
1090 | brelse(bh); |
1091 | *err = -EIO; | |
1092 | return NULL; | |
1093 | } | |
1094 | ||
7e49b6f2 | 1095 | int udf_setsize(struct inode *inode, loff_t newsize) |
1da177e4 | 1096 | { |
1da177e4 | 1097 | int err; |
48d6d8ff | 1098 | struct udf_inode_info *iinfo; |
7e49b6f2 | 1099 | int bsize = 1 << inode->i_blkbits; |
1da177e4 LT |
1100 | |
1101 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || | |
cb00ea35 | 1102 | S_ISLNK(inode->i_mode))) |
7e49b6f2 | 1103 | return -EINVAL; |
1da177e4 | 1104 | if (IS_APPEND(inode) || IS_IMMUTABLE(inode)) |
7e49b6f2 | 1105 | return -EPERM; |
1da177e4 | 1106 | |
48d6d8ff | 1107 | iinfo = UDF_I(inode); |
7e49b6f2 | 1108 | if (newsize > inode->i_size) { |
4d0fb621 | 1109 | down_write(&iinfo->i_data_sem); |
7e49b6f2 JK |
1110 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { |
1111 | if (bsize < | |
1112 | (udf_file_entry_alloc_offset(inode) + newsize)) { | |
1113 | err = udf_expand_file_adinicb(inode); | |
1114 | if (err) { | |
1115 | up_write(&iinfo->i_data_sem); | |
1116 | return err; | |
1117 | } | |
4b11111a | 1118 | } else |
7e49b6f2 JK |
1119 | iinfo->i_lenAlloc = newsize; |
1120 | } | |
1121 | err = udf_extend_file(inode, newsize); | |
1122 | if (err) { | |
1123 | up_write(&iinfo->i_data_sem); | |
1124 | return err; | |
1da177e4 | 1125 | } |
7e49b6f2 | 1126 | truncate_setsize(inode, newsize); |
4d0fb621 | 1127 | up_write(&iinfo->i_data_sem); |
cb00ea35 | 1128 | } else { |
7e49b6f2 JK |
1129 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { |
1130 | down_write(&iinfo->i_data_sem); | |
1131 | memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr + newsize, | |
1132 | 0x00, bsize - newsize - | |
1133 | udf_file_entry_alloc_offset(inode)); | |
1134 | iinfo->i_lenAlloc = newsize; | |
1135 | truncate_setsize(inode, newsize); | |
1136 | up_write(&iinfo->i_data_sem); | |
1137 | goto update_time; | |
1138 | } | |
1139 | err = block_truncate_page(inode->i_mapping, newsize, | |
1140 | udf_get_block); | |
1141 | if (err) | |
1142 | return err; | |
4d0fb621 | 1143 | down_write(&iinfo->i_data_sem); |
7e49b6f2 | 1144 | truncate_setsize(inode, newsize); |
1da177e4 | 1145 | udf_truncate_extents(inode); |
4d0fb621 | 1146 | up_write(&iinfo->i_data_sem); |
647bd61a | 1147 | } |
7e49b6f2 | 1148 | update_time: |
1da177e4 LT |
1149 | inode->i_mtime = inode->i_ctime = current_fs_time(inode->i_sb); |
1150 | if (IS_SYNC(inode)) | |
cb00ea35 | 1151 | udf_sync_inode(inode); |
1da177e4 LT |
1152 | else |
1153 | mark_inode_dirty(inode); | |
7e49b6f2 | 1154 | return 0; |
1da177e4 LT |
1155 | } |
1156 | ||
cb00ea35 | 1157 | static void __udf_read_inode(struct inode *inode) |
1da177e4 LT |
1158 | { |
1159 | struct buffer_head *bh = NULL; | |
1160 | struct fileEntry *fe; | |
1161 | uint16_t ident; | |
48d6d8ff | 1162 | struct udf_inode_info *iinfo = UDF_I(inode); |
1da177e4 LT |
1163 | |
1164 | /* | |
1165 | * Set defaults, but the inode is still incomplete! | |
1166 | * Note: get_new_inode() sets the following on a new inode: | |
1167 | * i_sb = sb | |
1168 | * i_no = ino | |
1169 | * i_flags = sb->s_flags | |
1170 | * i_state = 0 | |
1171 | * clean_inode(): zero fills and sets | |
1172 | * i_count = 1 | |
1173 | * i_nlink = 1 | |
1174 | * i_op = NULL; | |
1175 | */ | |
97e961fd | 1176 | bh = udf_read_ptagged(inode->i_sb, &iinfo->i_location, 0, &ident); |
cb00ea35 | 1177 | if (!bh) { |
78ace70c | 1178 | udf_err(inode->i_sb, "(ino %ld) failed !bh\n", inode->i_ino); |
1da177e4 LT |
1179 | make_bad_inode(inode); |
1180 | return; | |
1181 | } | |
1182 | ||
1183 | if (ident != TAG_IDENT_FE && ident != TAG_IDENT_EFE && | |
cb00ea35 | 1184 | ident != TAG_IDENT_USE) { |
78ace70c JP |
1185 | udf_err(inode->i_sb, "(ino %ld) failed ident=%d\n", |
1186 | inode->i_ino, ident); | |
3bf25cb4 | 1187 | brelse(bh); |
1da177e4 LT |
1188 | make_bad_inode(inode); |
1189 | return; | |
1190 | } | |
1191 | ||
1192 | fe = (struct fileEntry *)bh->b_data; | |
1193 | ||
5e0f0017 | 1194 | if (fe->icbTag.strategyType == cpu_to_le16(4096)) { |
1ab92785 | 1195 | struct buffer_head *ibh; |
1da177e4 | 1196 | |
97e961fd | 1197 | ibh = udf_read_ptagged(inode->i_sb, &iinfo->i_location, 1, |
4b11111a | 1198 | &ident); |
1ab92785 | 1199 | if (ident == TAG_IDENT_IE && ibh) { |
1200 | struct buffer_head *nbh = NULL; | |
5ca4e4be | 1201 | struct kernel_lb_addr loc; |
1ab92785 | 1202 | struct indirectEntry *ie; |
1203 | ||
1204 | ie = (struct indirectEntry *)ibh->b_data; | |
1205 | loc = lelb_to_cpu(ie->indirectICB.extLocation); | |
1206 | ||
1207 | if (ie->indirectICB.extLength && | |
97e961fd | 1208 | (nbh = udf_read_ptagged(inode->i_sb, &loc, 0, |
1ab92785 | 1209 | &ident))) { |
1210 | if (ident == TAG_IDENT_FE || | |
1211 | ident == TAG_IDENT_EFE) { | |
1212 | memcpy(&iinfo->i_location, | |
1213 | &loc, | |
5ca4e4be | 1214 | sizeof(struct kernel_lb_addr)); |
1ab92785 | 1215 | brelse(bh); |
3bf25cb4 | 1216 | brelse(ibh); |
1ab92785 | 1217 | brelse(nbh); |
1218 | __udf_read_inode(inode); | |
1219 | return; | |
28de7948 | 1220 | } |
1ab92785 | 1221 | brelse(nbh); |
1da177e4 | 1222 | } |
28de7948 | 1223 | } |
1ab92785 | 1224 | brelse(ibh); |
5e0f0017 | 1225 | } else if (fe->icbTag.strategyType != cpu_to_le16(4)) { |
78ace70c JP |
1226 | udf_err(inode->i_sb, "unsupported strategy type: %d\n", |
1227 | le16_to_cpu(fe->icbTag.strategyType)); | |
3bf25cb4 | 1228 | brelse(bh); |
1da177e4 LT |
1229 | make_bad_inode(inode); |
1230 | return; | |
1231 | } | |
1232 | udf_fill_inode(inode, bh); | |
31170b6a | 1233 | |
3bf25cb4 | 1234 | brelse(bh); |
1da177e4 LT |
1235 | } |
1236 | ||
1237 | static void udf_fill_inode(struct inode *inode, struct buffer_head *bh) | |
1238 | { | |
1239 | struct fileEntry *fe; | |
1240 | struct extendedFileEntry *efe; | |
1da177e4 | 1241 | int offset; |
6c79e987 | 1242 | struct udf_sb_info *sbi = UDF_SB(inode->i_sb); |
48d6d8ff | 1243 | struct udf_inode_info *iinfo = UDF_I(inode); |
bfe86848 | 1244 | unsigned int link_count; |
1da177e4 LT |
1245 | |
1246 | fe = (struct fileEntry *)bh->b_data; | |
1247 | efe = (struct extendedFileEntry *)bh->b_data; | |
1248 | ||
5e0f0017 | 1249 | if (fe->icbTag.strategyType == cpu_to_le16(4)) |
48d6d8ff | 1250 | iinfo->i_strat4096 = 0; |
5e0f0017 | 1251 | else /* if (fe->icbTag.strategyType == cpu_to_le16(4096)) */ |
48d6d8ff | 1252 | iinfo->i_strat4096 = 1; |
1da177e4 | 1253 | |
48d6d8ff | 1254 | iinfo->i_alloc_type = le16_to_cpu(fe->icbTag.flags) & |
4b11111a | 1255 | ICBTAG_FLAG_AD_MASK; |
48d6d8ff MS |
1256 | iinfo->i_unique = 0; |
1257 | iinfo->i_lenEAttr = 0; | |
1258 | iinfo->i_lenExtents = 0; | |
1259 | iinfo->i_lenAlloc = 0; | |
1260 | iinfo->i_next_alloc_block = 0; | |
1261 | iinfo->i_next_alloc_goal = 0; | |
5e0f0017 | 1262 | if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_EFE)) { |
48d6d8ff MS |
1263 | iinfo->i_efe = 1; |
1264 | iinfo->i_use = 0; | |
4b11111a MS |
1265 | if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize - |
1266 | sizeof(struct extendedFileEntry))) { | |
647bd61a CG |
1267 | make_bad_inode(inode); |
1268 | return; | |
1269 | } | |
48d6d8ff | 1270 | memcpy(iinfo->i_ext.i_data, |
4b11111a MS |
1271 | bh->b_data + sizeof(struct extendedFileEntry), |
1272 | inode->i_sb->s_blocksize - | |
1273 | sizeof(struct extendedFileEntry)); | |
5e0f0017 | 1274 | } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_FE)) { |
48d6d8ff MS |
1275 | iinfo->i_efe = 0; |
1276 | iinfo->i_use = 0; | |
4b11111a MS |
1277 | if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize - |
1278 | sizeof(struct fileEntry))) { | |
647bd61a CG |
1279 | make_bad_inode(inode); |
1280 | return; | |
1281 | } | |
48d6d8ff | 1282 | memcpy(iinfo->i_ext.i_data, |
c0b34438 | 1283 | bh->b_data + sizeof(struct fileEntry), |
cb00ea35 | 1284 | inode->i_sb->s_blocksize - sizeof(struct fileEntry)); |
5e0f0017 | 1285 | } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_USE)) { |
48d6d8ff MS |
1286 | iinfo->i_efe = 0; |
1287 | iinfo->i_use = 1; | |
1288 | iinfo->i_lenAlloc = le32_to_cpu( | |
4b11111a MS |
1289 | ((struct unallocSpaceEntry *)bh->b_data)-> |
1290 | lengthAllocDescs); | |
1291 | if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize - | |
1292 | sizeof(struct unallocSpaceEntry))) { | |
647bd61a CG |
1293 | make_bad_inode(inode); |
1294 | return; | |
1295 | } | |
48d6d8ff | 1296 | memcpy(iinfo->i_ext.i_data, |
4b11111a MS |
1297 | bh->b_data + sizeof(struct unallocSpaceEntry), |
1298 | inode->i_sb->s_blocksize - | |
1299 | sizeof(struct unallocSpaceEntry)); | |
1da177e4 LT |
1300 | return; |
1301 | } | |
1302 | ||
c03cad24 | 1303 | read_lock(&sbi->s_cred_lock); |
1da177e4 | 1304 | inode->i_uid = le32_to_cpu(fe->uid); |
ca76d2d8 CG |
1305 | if (inode->i_uid == -1 || |
1306 | UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_IGNORE) || | |
1307 | UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_SET)) | |
4d6660eb | 1308 | inode->i_uid = UDF_SB(inode->i_sb)->s_uid; |
1da177e4 LT |
1309 | |
1310 | inode->i_gid = le32_to_cpu(fe->gid); | |
ca76d2d8 CG |
1311 | if (inode->i_gid == -1 || |
1312 | UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_IGNORE) || | |
1313 | UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_SET)) | |
4d6660eb | 1314 | inode->i_gid = UDF_SB(inode->i_sb)->s_gid; |
1da177e4 | 1315 | |
7ac9bcd5 | 1316 | if (fe->icbTag.fileType != ICBTAG_FILE_TYPE_DIRECTORY && |
87bc730c | 1317 | sbi->s_fmode != UDF_INVALID_MODE) |
7ac9bcd5 MS |
1318 | inode->i_mode = sbi->s_fmode; |
1319 | else if (fe->icbTag.fileType == ICBTAG_FILE_TYPE_DIRECTORY && | |
87bc730c | 1320 | sbi->s_dmode != UDF_INVALID_MODE) |
7ac9bcd5 MS |
1321 | inode->i_mode = sbi->s_dmode; |
1322 | else | |
1323 | inode->i_mode = udf_convert_permissions(fe); | |
1324 | inode->i_mode &= ~sbi->s_umask; | |
c03cad24 JK |
1325 | read_unlock(&sbi->s_cred_lock); |
1326 | ||
bfe86848 MS |
1327 | link_count = le16_to_cpu(fe->fileLinkCount); |
1328 | if (!link_count) | |
1329 | link_count = 1; | |
1330 | set_nlink(inode, link_count); | |
c03cad24 JK |
1331 | |
1332 | inode->i_size = le64_to_cpu(fe->informationLength); | |
1333 | iinfo->i_lenExtents = inode->i_size; | |
1da177e4 | 1334 | |
48d6d8ff | 1335 | if (iinfo->i_efe == 0) { |
1da177e4 | 1336 | inode->i_blocks = le64_to_cpu(fe->logicalBlocksRecorded) << |
28de7948 | 1337 | (inode->i_sb->s_blocksize_bits - 9); |
1da177e4 | 1338 | |
56774805 | 1339 | if (!udf_disk_stamp_to_time(&inode->i_atime, fe->accessTime)) |
cbf5676a | 1340 | inode->i_atime = sbi->s_record_time; |
1341 | ||
56774805 MS |
1342 | if (!udf_disk_stamp_to_time(&inode->i_mtime, |
1343 | fe->modificationTime)) | |
cbf5676a | 1344 | inode->i_mtime = sbi->s_record_time; |
1345 | ||
56774805 | 1346 | if (!udf_disk_stamp_to_time(&inode->i_ctime, fe->attrTime)) |
cbf5676a | 1347 | inode->i_ctime = sbi->s_record_time; |
1da177e4 | 1348 | |
48d6d8ff MS |
1349 | iinfo->i_unique = le64_to_cpu(fe->uniqueID); |
1350 | iinfo->i_lenEAttr = le32_to_cpu(fe->lengthExtendedAttr); | |
1351 | iinfo->i_lenAlloc = le32_to_cpu(fe->lengthAllocDescs); | |
1352 | offset = sizeof(struct fileEntry) + iinfo->i_lenEAttr; | |
cb00ea35 | 1353 | } else { |
647bd61a | 1354 | inode->i_blocks = le64_to_cpu(efe->logicalBlocksRecorded) << |
cb00ea35 | 1355 | (inode->i_sb->s_blocksize_bits - 9); |
1da177e4 | 1356 | |
56774805 | 1357 | if (!udf_disk_stamp_to_time(&inode->i_atime, efe->accessTime)) |
cbf5676a | 1358 | inode->i_atime = sbi->s_record_time; |
1359 | ||
56774805 MS |
1360 | if (!udf_disk_stamp_to_time(&inode->i_mtime, |
1361 | efe->modificationTime)) | |
cbf5676a | 1362 | inode->i_mtime = sbi->s_record_time; |
1363 | ||
56774805 | 1364 | if (!udf_disk_stamp_to_time(&iinfo->i_crtime, efe->createTime)) |
cbf5676a | 1365 | iinfo->i_crtime = sbi->s_record_time; |
1366 | ||
56774805 | 1367 | if (!udf_disk_stamp_to_time(&inode->i_ctime, efe->attrTime)) |
cbf5676a | 1368 | inode->i_ctime = sbi->s_record_time; |
1da177e4 | 1369 | |
48d6d8ff MS |
1370 | iinfo->i_unique = le64_to_cpu(efe->uniqueID); |
1371 | iinfo->i_lenEAttr = le32_to_cpu(efe->lengthExtendedAttr); | |
1372 | iinfo->i_lenAlloc = le32_to_cpu(efe->lengthAllocDescs); | |
4b11111a | 1373 | offset = sizeof(struct extendedFileEntry) + |
48d6d8ff | 1374 | iinfo->i_lenEAttr; |
1da177e4 LT |
1375 | } |
1376 | ||
cb00ea35 CG |
1377 | switch (fe->icbTag.fileType) { |
1378 | case ICBTAG_FILE_TYPE_DIRECTORY: | |
28de7948 CG |
1379 | inode->i_op = &udf_dir_inode_operations; |
1380 | inode->i_fop = &udf_dir_operations; | |
1381 | inode->i_mode |= S_IFDIR; | |
1382 | inc_nlink(inode); | |
1383 | break; | |
cb00ea35 CG |
1384 | case ICBTAG_FILE_TYPE_REALTIME: |
1385 | case ICBTAG_FILE_TYPE_REGULAR: | |
1386 | case ICBTAG_FILE_TYPE_UNDEF: | |
742e1795 | 1387 | case ICBTAG_FILE_TYPE_VAT20: |
48d6d8ff | 1388 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
28de7948 CG |
1389 | inode->i_data.a_ops = &udf_adinicb_aops; |
1390 | else | |
1391 | inode->i_data.a_ops = &udf_aops; | |
1392 | inode->i_op = &udf_file_inode_operations; | |
1393 | inode->i_fop = &udf_file_operations; | |
1394 | inode->i_mode |= S_IFREG; | |
1395 | break; | |
cb00ea35 | 1396 | case ICBTAG_FILE_TYPE_BLOCK: |
28de7948 CG |
1397 | inode->i_mode |= S_IFBLK; |
1398 | break; | |
cb00ea35 | 1399 | case ICBTAG_FILE_TYPE_CHAR: |
28de7948 CG |
1400 | inode->i_mode |= S_IFCHR; |
1401 | break; | |
cb00ea35 | 1402 | case ICBTAG_FILE_TYPE_FIFO: |
28de7948 CG |
1403 | init_special_inode(inode, inode->i_mode | S_IFIFO, 0); |
1404 | break; | |
cb00ea35 | 1405 | case ICBTAG_FILE_TYPE_SOCKET: |
28de7948 CG |
1406 | init_special_inode(inode, inode->i_mode | S_IFSOCK, 0); |
1407 | break; | |
cb00ea35 | 1408 | case ICBTAG_FILE_TYPE_SYMLINK: |
28de7948 | 1409 | inode->i_data.a_ops = &udf_symlink_aops; |
c15d0fc0 | 1410 | inode->i_op = &udf_symlink_inode_operations; |
28de7948 CG |
1411 | inode->i_mode = S_IFLNK | S_IRWXUGO; |
1412 | break; | |
bfb257a5 JK |
1413 | case ICBTAG_FILE_TYPE_MAIN: |
1414 | udf_debug("METADATA FILE-----\n"); | |
1415 | break; | |
1416 | case ICBTAG_FILE_TYPE_MIRROR: | |
1417 | udf_debug("METADATA MIRROR FILE-----\n"); | |
1418 | break; | |
1419 | case ICBTAG_FILE_TYPE_BITMAP: | |
1420 | udf_debug("METADATA BITMAP FILE-----\n"); | |
1421 | break; | |
cb00ea35 | 1422 | default: |
78ace70c JP |
1423 | udf_err(inode->i_sb, "(ino %ld) failed unknown file type=%d\n", |
1424 | inode->i_ino, fe->icbTag.fileType); | |
28de7948 CG |
1425 | make_bad_inode(inode); |
1426 | return; | |
1da177e4 | 1427 | } |
cb00ea35 | 1428 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { |
4b11111a MS |
1429 | struct deviceSpec *dsea = |
1430 | (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1); | |
cb00ea35 CG |
1431 | if (dsea) { |
1432 | init_special_inode(inode, inode->i_mode, | |
4b11111a MS |
1433 | MKDEV(le32_to_cpu(dsea->majorDeviceIdent), |
1434 | le32_to_cpu(dsea->minorDeviceIdent))); | |
1da177e4 | 1435 | /* Developer ID ??? */ |
4b11111a | 1436 | } else |
1da177e4 | 1437 | make_bad_inode(inode); |
1da177e4 LT |
1438 | } |
1439 | } | |
1440 | ||
647bd61a CG |
1441 | static int udf_alloc_i_data(struct inode *inode, size_t size) |
1442 | { | |
48d6d8ff MS |
1443 | struct udf_inode_info *iinfo = UDF_I(inode); |
1444 | iinfo->i_ext.i_data = kmalloc(size, GFP_KERNEL); | |
647bd61a | 1445 | |
48d6d8ff | 1446 | if (!iinfo->i_ext.i_data) { |
78ace70c JP |
1447 | udf_err(inode->i_sb, "(ino %ld) no free memory\n", |
1448 | inode->i_ino); | |
647bd61a CG |
1449 | return -ENOMEM; |
1450 | } | |
1451 | ||
1452 | return 0; | |
1453 | } | |
1454 | ||
cb00ea35 | 1455 | static mode_t udf_convert_permissions(struct fileEntry *fe) |
1da177e4 LT |
1456 | { |
1457 | mode_t mode; | |
1458 | uint32_t permissions; | |
1459 | uint32_t flags; | |
1460 | ||
1461 | permissions = le32_to_cpu(fe->permissions); | |
1462 | flags = le16_to_cpu(fe->icbTag.flags); | |
1463 | ||
4b11111a MS |
1464 | mode = ((permissions) & S_IRWXO) | |
1465 | ((permissions >> 2) & S_IRWXG) | | |
1466 | ((permissions >> 4) & S_IRWXU) | | |
1467 | ((flags & ICBTAG_FLAG_SETUID) ? S_ISUID : 0) | | |
1468 | ((flags & ICBTAG_FLAG_SETGID) ? S_ISGID : 0) | | |
1469 | ((flags & ICBTAG_FLAG_STICKY) ? S_ISVTX : 0); | |
1da177e4 LT |
1470 | |
1471 | return mode; | |
1472 | } | |
1473 | ||
a9185b41 | 1474 | int udf_write_inode(struct inode *inode, struct writeback_control *wbc) |
1da177e4 | 1475 | { |
49521de1 | 1476 | return udf_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL); |
1da177e4 LT |
1477 | } |
1478 | ||
49521de1 | 1479 | static int udf_sync_inode(struct inode *inode) |
1da177e4 LT |
1480 | { |
1481 | return udf_update_inode(inode, 1); | |
1482 | } | |
1483 | ||
cb00ea35 | 1484 | static int udf_update_inode(struct inode *inode, int do_sync) |
1da177e4 LT |
1485 | { |
1486 | struct buffer_head *bh = NULL; | |
1487 | struct fileEntry *fe; | |
1488 | struct extendedFileEntry *efe; | |
1489 | uint32_t udfperms; | |
1490 | uint16_t icbflags; | |
1491 | uint16_t crclen; | |
1da177e4 | 1492 | int err = 0; |
6c79e987 | 1493 | struct udf_sb_info *sbi = UDF_SB(inode->i_sb); |
4b11111a | 1494 | unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; |
48d6d8ff | 1495 | struct udf_inode_info *iinfo = UDF_I(inode); |
1da177e4 | 1496 | |
5833ded9 JK |
1497 | bh = udf_tgetblk(inode->i_sb, |
1498 | udf_get_lb_pblock(inode->i_sb, &iinfo->i_location, 0)); | |
cb00ea35 | 1499 | if (!bh) { |
aae917cd JK |
1500 | udf_debug("getblk failure\n"); |
1501 | return -ENOMEM; | |
1da177e4 LT |
1502 | } |
1503 | ||
aae917cd JK |
1504 | lock_buffer(bh); |
1505 | memset(bh->b_data, 0, inode->i_sb->s_blocksize); | |
1da177e4 LT |
1506 | fe = (struct fileEntry *)bh->b_data; |
1507 | efe = (struct extendedFileEntry *)bh->b_data; | |
1508 | ||
aae917cd | 1509 | if (iinfo->i_use) { |
1da177e4 | 1510 | struct unallocSpaceEntry *use = |
28de7948 | 1511 | (struct unallocSpaceEntry *)bh->b_data; |
1da177e4 | 1512 | |
48d6d8ff | 1513 | use->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc); |
4b11111a | 1514 | memcpy(bh->b_data + sizeof(struct unallocSpaceEntry), |
48d6d8ff | 1515 | iinfo->i_ext.i_data, inode->i_sb->s_blocksize - |
4b11111a | 1516 | sizeof(struct unallocSpaceEntry)); |
aae917cd JK |
1517 | use->descTag.tagIdent = cpu_to_le16(TAG_IDENT_USE); |
1518 | use->descTag.tagLocation = | |
1519 | cpu_to_le32(iinfo->i_location.logicalBlockNum); | |
4b11111a | 1520 | crclen = sizeof(struct unallocSpaceEntry) + |
5ca4e4be | 1521 | iinfo->i_lenAlloc - sizeof(struct tag); |
1da177e4 | 1522 | use->descTag.descCRCLength = cpu_to_le16(crclen); |
f845fced | 1523 | use->descTag.descCRC = cpu_to_le16(crc_itu_t(0, (char *)use + |
5ca4e4be | 1524 | sizeof(struct tag), |
f845fced | 1525 | crclen)); |
3f2587bb | 1526 | use->descTag.tagChecksum = udf_tag_checksum(&use->descTag); |
1da177e4 | 1527 | |
aae917cd | 1528 | goto out; |
1da177e4 LT |
1529 | } |
1530 | ||
4d6660eb PS |
1531 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_FORGET)) |
1532 | fe->uid = cpu_to_le32(-1); | |
cb00ea35 CG |
1533 | else |
1534 | fe->uid = cpu_to_le32(inode->i_uid); | |
1da177e4 | 1535 | |
4d6660eb PS |
1536 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_FORGET)) |
1537 | fe->gid = cpu_to_le32(-1); | |
cb00ea35 CG |
1538 | else |
1539 | fe->gid = cpu_to_le32(inode->i_gid); | |
1da177e4 | 1540 | |
4b11111a MS |
1541 | udfperms = ((inode->i_mode & S_IRWXO)) | |
1542 | ((inode->i_mode & S_IRWXG) << 2) | | |
1543 | ((inode->i_mode & S_IRWXU) << 4); | |
1da177e4 | 1544 | |
4b11111a MS |
1545 | udfperms |= (le32_to_cpu(fe->permissions) & |
1546 | (FE_PERM_O_DELETE | FE_PERM_O_CHATTR | | |
1547 | FE_PERM_G_DELETE | FE_PERM_G_CHATTR | | |
1548 | FE_PERM_U_DELETE | FE_PERM_U_CHATTR)); | |
1da177e4 LT |
1549 | fe->permissions = cpu_to_le32(udfperms); |
1550 | ||
1551 | if (S_ISDIR(inode->i_mode)) | |
1552 | fe->fileLinkCount = cpu_to_le16(inode->i_nlink - 1); | |
1553 | else | |
1554 | fe->fileLinkCount = cpu_to_le16(inode->i_nlink); | |
1555 | ||
1556 | fe->informationLength = cpu_to_le64(inode->i_size); | |
1557 | ||
cb00ea35 | 1558 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { |
5ca4e4be | 1559 | struct regid *eid; |
28de7948 CG |
1560 | struct deviceSpec *dsea = |
1561 | (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1); | |
cb00ea35 | 1562 | if (!dsea) { |
1da177e4 | 1563 | dsea = (struct deviceSpec *) |
28de7948 CG |
1564 | udf_add_extendedattr(inode, |
1565 | sizeof(struct deviceSpec) + | |
5ca4e4be | 1566 | sizeof(struct regid), 12, 0x3); |
1da177e4 LT |
1567 | dsea->attrType = cpu_to_le32(12); |
1568 | dsea->attrSubtype = 1; | |
4b11111a MS |
1569 | dsea->attrLength = cpu_to_le32( |
1570 | sizeof(struct deviceSpec) + | |
5ca4e4be PE |
1571 | sizeof(struct regid)); |
1572 | dsea->impUseLength = cpu_to_le32(sizeof(struct regid)); | |
1da177e4 | 1573 | } |
5ca4e4be PE |
1574 | eid = (struct regid *)dsea->impUse; |
1575 | memset(eid, 0, sizeof(struct regid)); | |
1da177e4 LT |
1576 | strcpy(eid->ident, UDF_ID_DEVELOPER); |
1577 | eid->identSuffix[0] = UDF_OS_CLASS_UNIX; | |
1578 | eid->identSuffix[1] = UDF_OS_ID_LINUX; | |
1579 | dsea->majorDeviceIdent = cpu_to_le32(imajor(inode)); | |
1580 | dsea->minorDeviceIdent = cpu_to_le32(iminor(inode)); | |
1581 | } | |
1582 | ||
48d6d8ff | 1583 | if (iinfo->i_efe == 0) { |
c0b34438 | 1584 | memcpy(bh->b_data + sizeof(struct fileEntry), |
48d6d8ff | 1585 | iinfo->i_ext.i_data, |
cb00ea35 | 1586 | inode->i_sb->s_blocksize - sizeof(struct fileEntry)); |
28de7948 | 1587 | fe->logicalBlocksRecorded = cpu_to_le64( |
4b11111a MS |
1588 | (inode->i_blocks + (1 << (blocksize_bits - 9)) - 1) >> |
1589 | (blocksize_bits - 9)); | |
1da177e4 | 1590 | |
56774805 MS |
1591 | udf_time_to_disk_stamp(&fe->accessTime, inode->i_atime); |
1592 | udf_time_to_disk_stamp(&fe->modificationTime, inode->i_mtime); | |
1593 | udf_time_to_disk_stamp(&fe->attrTime, inode->i_ctime); | |
5ca4e4be | 1594 | memset(&(fe->impIdent), 0, sizeof(struct regid)); |
1da177e4 LT |
1595 | strcpy(fe->impIdent.ident, UDF_ID_DEVELOPER); |
1596 | fe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; | |
1597 | fe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; | |
48d6d8ff MS |
1598 | fe->uniqueID = cpu_to_le64(iinfo->i_unique); |
1599 | fe->lengthExtendedAttr = cpu_to_le32(iinfo->i_lenEAttr); | |
1600 | fe->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc); | |
1da177e4 LT |
1601 | fe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_FE); |
1602 | crclen = sizeof(struct fileEntry); | |
cb00ea35 | 1603 | } else { |
4b11111a | 1604 | memcpy(bh->b_data + sizeof(struct extendedFileEntry), |
48d6d8ff | 1605 | iinfo->i_ext.i_data, |
4b11111a MS |
1606 | inode->i_sb->s_blocksize - |
1607 | sizeof(struct extendedFileEntry)); | |
1da177e4 | 1608 | efe->objectSize = cpu_to_le64(inode->i_size); |
28de7948 | 1609 | efe->logicalBlocksRecorded = cpu_to_le64( |
4b11111a MS |
1610 | (inode->i_blocks + (1 << (blocksize_bits - 9)) - 1) >> |
1611 | (blocksize_bits - 9)); | |
1da177e4 | 1612 | |
48d6d8ff MS |
1613 | if (iinfo->i_crtime.tv_sec > inode->i_atime.tv_sec || |
1614 | (iinfo->i_crtime.tv_sec == inode->i_atime.tv_sec && | |
1615 | iinfo->i_crtime.tv_nsec > inode->i_atime.tv_nsec)) | |
1616 | iinfo->i_crtime = inode->i_atime; | |
4b11111a | 1617 | |
48d6d8ff MS |
1618 | if (iinfo->i_crtime.tv_sec > inode->i_mtime.tv_sec || |
1619 | (iinfo->i_crtime.tv_sec == inode->i_mtime.tv_sec && | |
1620 | iinfo->i_crtime.tv_nsec > inode->i_mtime.tv_nsec)) | |
1621 | iinfo->i_crtime = inode->i_mtime; | |
4b11111a | 1622 | |
48d6d8ff MS |
1623 | if (iinfo->i_crtime.tv_sec > inode->i_ctime.tv_sec || |
1624 | (iinfo->i_crtime.tv_sec == inode->i_ctime.tv_sec && | |
1625 | iinfo->i_crtime.tv_nsec > inode->i_ctime.tv_nsec)) | |
1626 | iinfo->i_crtime = inode->i_ctime; | |
1da177e4 | 1627 | |
56774805 MS |
1628 | udf_time_to_disk_stamp(&efe->accessTime, inode->i_atime); |
1629 | udf_time_to_disk_stamp(&efe->modificationTime, inode->i_mtime); | |
1630 | udf_time_to_disk_stamp(&efe->createTime, iinfo->i_crtime); | |
1631 | udf_time_to_disk_stamp(&efe->attrTime, inode->i_ctime); | |
1da177e4 | 1632 | |
5ca4e4be | 1633 | memset(&(efe->impIdent), 0, sizeof(struct regid)); |
1da177e4 LT |
1634 | strcpy(efe->impIdent.ident, UDF_ID_DEVELOPER); |
1635 | efe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; | |
1636 | efe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; | |
48d6d8ff MS |
1637 | efe->uniqueID = cpu_to_le64(iinfo->i_unique); |
1638 | efe->lengthExtendedAttr = cpu_to_le32(iinfo->i_lenEAttr); | |
1639 | efe->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc); | |
1da177e4 LT |
1640 | efe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_EFE); |
1641 | crclen = sizeof(struct extendedFileEntry); | |
1642 | } | |
48d6d8ff | 1643 | if (iinfo->i_strat4096) { |
1da177e4 LT |
1644 | fe->icbTag.strategyType = cpu_to_le16(4096); |
1645 | fe->icbTag.strategyParameter = cpu_to_le16(1); | |
1646 | fe->icbTag.numEntries = cpu_to_le16(2); | |
cb00ea35 | 1647 | } else { |
1da177e4 LT |
1648 | fe->icbTag.strategyType = cpu_to_le16(4); |
1649 | fe->icbTag.numEntries = cpu_to_le16(1); | |
1650 | } | |
1651 | ||
1652 | if (S_ISDIR(inode->i_mode)) | |
1653 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_DIRECTORY; | |
1654 | else if (S_ISREG(inode->i_mode)) | |
1655 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_REGULAR; | |
1656 | else if (S_ISLNK(inode->i_mode)) | |
1657 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_SYMLINK; | |
1658 | else if (S_ISBLK(inode->i_mode)) | |
1659 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_BLOCK; | |
1660 | else if (S_ISCHR(inode->i_mode)) | |
1661 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_CHAR; | |
1662 | else if (S_ISFIFO(inode->i_mode)) | |
1663 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_FIFO; | |
1664 | else if (S_ISSOCK(inode->i_mode)) | |
1665 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_SOCKET; | |
1666 | ||
48d6d8ff | 1667 | icbflags = iinfo->i_alloc_type | |
28de7948 CG |
1668 | ((inode->i_mode & S_ISUID) ? ICBTAG_FLAG_SETUID : 0) | |
1669 | ((inode->i_mode & S_ISGID) ? ICBTAG_FLAG_SETGID : 0) | | |
1670 | ((inode->i_mode & S_ISVTX) ? ICBTAG_FLAG_STICKY : 0) | | |
1671 | (le16_to_cpu(fe->icbTag.flags) & | |
1672 | ~(ICBTAG_FLAG_AD_MASK | ICBTAG_FLAG_SETUID | | |
1673 | ICBTAG_FLAG_SETGID | ICBTAG_FLAG_STICKY)); | |
1da177e4 LT |
1674 | |
1675 | fe->icbTag.flags = cpu_to_le16(icbflags); | |
6c79e987 | 1676 | if (sbi->s_udfrev >= 0x0200) |
1da177e4 LT |
1677 | fe->descTag.descVersion = cpu_to_le16(3); |
1678 | else | |
1679 | fe->descTag.descVersion = cpu_to_le16(2); | |
6c79e987 | 1680 | fe->descTag.tagSerialNum = cpu_to_le16(sbi->s_serial_number); |
4b11111a | 1681 | fe->descTag.tagLocation = cpu_to_le32( |
48d6d8ff | 1682 | iinfo->i_location.logicalBlockNum); |
aae917cd | 1683 | crclen += iinfo->i_lenEAttr + iinfo->i_lenAlloc - sizeof(struct tag); |
1da177e4 | 1684 | fe->descTag.descCRCLength = cpu_to_le16(crclen); |
5ca4e4be | 1685 | fe->descTag.descCRC = cpu_to_le16(crc_itu_t(0, (char *)fe + sizeof(struct tag), |
f845fced | 1686 | crclen)); |
3f2587bb | 1687 | fe->descTag.tagChecksum = udf_tag_checksum(&fe->descTag); |
1da177e4 | 1688 | |
aae917cd | 1689 | out: |
5833ded9 | 1690 | set_buffer_uptodate(bh); |
aae917cd JK |
1691 | unlock_buffer(bh); |
1692 | ||
1da177e4 LT |
1693 | /* write the data blocks */ |
1694 | mark_buffer_dirty(bh); | |
cb00ea35 | 1695 | if (do_sync) { |
1da177e4 | 1696 | sync_dirty_buffer(bh); |
aae917cd | 1697 | if (buffer_write_io_error(bh)) { |
78ace70c JP |
1698 | udf_warn(inode->i_sb, "IO error syncing udf inode [%08lx]\n", |
1699 | inode->i_ino); | |
1da177e4 LT |
1700 | err = -EIO; |
1701 | } | |
1702 | } | |
3bf25cb4 | 1703 | brelse(bh); |
28de7948 | 1704 | |
1da177e4 LT |
1705 | return err; |
1706 | } | |
1707 | ||
97e961fd | 1708 | struct inode *udf_iget(struct super_block *sb, struct kernel_lb_addr *ino) |
1da177e4 LT |
1709 | { |
1710 | unsigned long block = udf_get_lb_pblock(sb, ino, 0); | |
1711 | struct inode *inode = iget_locked(sb, block); | |
1712 | ||
1713 | if (!inode) | |
1714 | return NULL; | |
1715 | ||
1716 | if (inode->i_state & I_NEW) { | |
97e961fd | 1717 | memcpy(&UDF_I(inode)->i_location, ino, sizeof(struct kernel_lb_addr)); |
1da177e4 LT |
1718 | __udf_read_inode(inode); |
1719 | unlock_new_inode(inode); | |
1720 | } | |
1721 | ||
1722 | if (is_bad_inode(inode)) | |
1723 | goto out_iput; | |
1724 | ||
97e961fd PE |
1725 | if (ino->logicalBlockNum >= UDF_SB(sb)-> |
1726 | s_partmaps[ino->partitionReferenceNum].s_partition_len) { | |
1da177e4 | 1727 | udf_debug("block=%d, partition=%d out of range\n", |
97e961fd | 1728 | ino->logicalBlockNum, ino->partitionReferenceNum); |
1da177e4 LT |
1729 | make_bad_inode(inode); |
1730 | goto out_iput; | |
1731 | } | |
1732 | ||
1733 | return inode; | |
1734 | ||
28de7948 | 1735 | out_iput: |
1da177e4 LT |
1736 | iput(inode); |
1737 | return NULL; | |
1738 | } | |
1739 | ||
7e49b6f2 JK |
1740 | int udf_add_aext(struct inode *inode, struct extent_position *epos, |
1741 | struct kernel_lb_addr *eloc, uint32_t elen, int inc) | |
1da177e4 LT |
1742 | { |
1743 | int adsize; | |
5ca4e4be PE |
1744 | struct short_ad *sad = NULL; |
1745 | struct long_ad *lad = NULL; | |
1da177e4 | 1746 | struct allocExtDesc *aed; |
1da177e4 | 1747 | uint8_t *ptr; |
48d6d8ff | 1748 | struct udf_inode_info *iinfo = UDF_I(inode); |
1da177e4 | 1749 | |
ff116fc8 | 1750 | if (!epos->bh) |
48d6d8ff | 1751 | ptr = iinfo->i_ext.i_data + epos->offset - |
4b11111a | 1752 | udf_file_entry_alloc_offset(inode) + |
48d6d8ff | 1753 | iinfo->i_lenEAttr; |
1da177e4 | 1754 | else |
ff116fc8 | 1755 | ptr = epos->bh->b_data + epos->offset; |
1da177e4 | 1756 | |
48d6d8ff | 1757 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
5ca4e4be | 1758 | adsize = sizeof(struct short_ad); |
48d6d8ff | 1759 | else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
5ca4e4be | 1760 | adsize = sizeof(struct long_ad); |
1da177e4 | 1761 | else |
7e49b6f2 | 1762 | return -EIO; |
1da177e4 | 1763 | |
cb00ea35 | 1764 | if (epos->offset + (2 * adsize) > inode->i_sb->s_blocksize) { |
391e8bbd | 1765 | unsigned char *sptr, *dptr; |
1da177e4 LT |
1766 | struct buffer_head *nbh; |
1767 | int err, loffset; | |
5ca4e4be | 1768 | struct kernel_lb_addr obloc = epos->block; |
1da177e4 | 1769 | |
4b11111a MS |
1770 | epos->block.logicalBlockNum = udf_new_block(inode->i_sb, NULL, |
1771 | obloc.partitionReferenceNum, | |
1772 | obloc.logicalBlockNum, &err); | |
1773 | if (!epos->block.logicalBlockNum) | |
7e49b6f2 | 1774 | return -ENOSPC; |
4b11111a | 1775 | nbh = udf_tgetblk(inode->i_sb, udf_get_lb_pblock(inode->i_sb, |
97e961fd | 1776 | &epos->block, |
4b11111a MS |
1777 | 0)); |
1778 | if (!nbh) | |
7e49b6f2 | 1779 | return -EIO; |
1da177e4 LT |
1780 | lock_buffer(nbh); |
1781 | memset(nbh->b_data, 0x00, inode->i_sb->s_blocksize); | |
1782 | set_buffer_uptodate(nbh); | |
1783 | unlock_buffer(nbh); | |
1784 | mark_buffer_dirty_inode(nbh, inode); | |
1785 | ||
1786 | aed = (struct allocExtDesc *)(nbh->b_data); | |
1787 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT)) | |
4b11111a MS |
1788 | aed->previousAllocExtLocation = |
1789 | cpu_to_le32(obloc.logicalBlockNum); | |
cb00ea35 | 1790 | if (epos->offset + adsize > inode->i_sb->s_blocksize) { |
ff116fc8 | 1791 | loffset = epos->offset; |
1da177e4 LT |
1792 | aed->lengthAllocDescs = cpu_to_le32(adsize); |
1793 | sptr = ptr - adsize; | |
1794 | dptr = nbh->b_data + sizeof(struct allocExtDesc); | |
1795 | memcpy(dptr, sptr, adsize); | |
ff116fc8 | 1796 | epos->offset = sizeof(struct allocExtDesc) + adsize; |
cb00ea35 | 1797 | } else { |
ff116fc8 | 1798 | loffset = epos->offset + adsize; |
1da177e4 LT |
1799 | aed->lengthAllocDescs = cpu_to_le32(0); |
1800 | sptr = ptr; | |
ff116fc8 | 1801 | epos->offset = sizeof(struct allocExtDesc); |
1da177e4 | 1802 | |
cb00ea35 | 1803 | if (epos->bh) { |
ff116fc8 | 1804 | aed = (struct allocExtDesc *)epos->bh->b_data; |
c2104fda | 1805 | le32_add_cpu(&aed->lengthAllocDescs, adsize); |
cb00ea35 | 1806 | } else { |
48d6d8ff | 1807 | iinfo->i_lenAlloc += adsize; |
1da177e4 LT |
1808 | mark_inode_dirty(inode); |
1809 | } | |
1810 | } | |
6c79e987 | 1811 | if (UDF_SB(inode->i_sb)->s_udfrev >= 0x0200) |
1da177e4 | 1812 | udf_new_tag(nbh->b_data, TAG_IDENT_AED, 3, 1, |
5ca4e4be | 1813 | epos->block.logicalBlockNum, sizeof(struct tag)); |
1da177e4 LT |
1814 | else |
1815 | udf_new_tag(nbh->b_data, TAG_IDENT_AED, 2, 1, | |
5ca4e4be | 1816 | epos->block.logicalBlockNum, sizeof(struct tag)); |
48d6d8ff | 1817 | switch (iinfo->i_alloc_type) { |
cb00ea35 | 1818 | case ICBTAG_FLAG_AD_SHORT: |
5ca4e4be | 1819 | sad = (struct short_ad *)sptr; |
28de7948 CG |
1820 | sad->extLength = cpu_to_le32(EXT_NEXT_EXTENT_ALLOCDECS | |
1821 | inode->i_sb->s_blocksize); | |
4b11111a MS |
1822 | sad->extPosition = |
1823 | cpu_to_le32(epos->block.logicalBlockNum); | |
28de7948 | 1824 | break; |
cb00ea35 | 1825 | case ICBTAG_FLAG_AD_LONG: |
5ca4e4be | 1826 | lad = (struct long_ad *)sptr; |
28de7948 CG |
1827 | lad->extLength = cpu_to_le32(EXT_NEXT_EXTENT_ALLOCDECS | |
1828 | inode->i_sb->s_blocksize); | |
1829 | lad->extLocation = cpu_to_lelb(epos->block); | |
1830 | memset(lad->impUse, 0x00, sizeof(lad->impUse)); | |
1831 | break; | |
1da177e4 | 1832 | } |
cb00ea35 | 1833 | if (epos->bh) { |
28de7948 | 1834 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
6c79e987 | 1835 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) |
ff116fc8 | 1836 | udf_update_tag(epos->bh->b_data, loffset); |
1da177e4 | 1837 | else |
4b11111a MS |
1838 | udf_update_tag(epos->bh->b_data, |
1839 | sizeof(struct allocExtDesc)); | |
ff116fc8 | 1840 | mark_buffer_dirty_inode(epos->bh, inode); |
3bf25cb4 | 1841 | brelse(epos->bh); |
28de7948 | 1842 | } else { |
1da177e4 | 1843 | mark_inode_dirty(inode); |
28de7948 | 1844 | } |
ff116fc8 | 1845 | epos->bh = nbh; |
1da177e4 LT |
1846 | } |
1847 | ||
7e49b6f2 | 1848 | udf_write_aext(inode, epos, eloc, elen, inc); |
1da177e4 | 1849 | |
cb00ea35 | 1850 | if (!epos->bh) { |
48d6d8ff | 1851 | iinfo->i_lenAlloc += adsize; |
1da177e4 | 1852 | mark_inode_dirty(inode); |
cb00ea35 | 1853 | } else { |
ff116fc8 | 1854 | aed = (struct allocExtDesc *)epos->bh->b_data; |
c2104fda | 1855 | le32_add_cpu(&aed->lengthAllocDescs, adsize); |
4b11111a MS |
1856 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
1857 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) | |
1858 | udf_update_tag(epos->bh->b_data, | |
1859 | epos->offset + (inc ? 0 : adsize)); | |
1da177e4 | 1860 | else |
4b11111a MS |
1861 | udf_update_tag(epos->bh->b_data, |
1862 | sizeof(struct allocExtDesc)); | |
ff116fc8 | 1863 | mark_buffer_dirty_inode(epos->bh, inode); |
1da177e4 LT |
1864 | } |
1865 | ||
7e49b6f2 | 1866 | return 0; |
1da177e4 LT |
1867 | } |
1868 | ||
7e49b6f2 JK |
1869 | void udf_write_aext(struct inode *inode, struct extent_position *epos, |
1870 | struct kernel_lb_addr *eloc, uint32_t elen, int inc) | |
1da177e4 LT |
1871 | { |
1872 | int adsize; | |
1873 | uint8_t *ptr; | |
5ca4e4be PE |
1874 | struct short_ad *sad; |
1875 | struct long_ad *lad; | |
48d6d8ff | 1876 | struct udf_inode_info *iinfo = UDF_I(inode); |
1da177e4 | 1877 | |
ff116fc8 | 1878 | if (!epos->bh) |
48d6d8ff | 1879 | ptr = iinfo->i_ext.i_data + epos->offset - |
4b11111a | 1880 | udf_file_entry_alloc_offset(inode) + |
48d6d8ff | 1881 | iinfo->i_lenEAttr; |
1da177e4 | 1882 | else |
ff116fc8 | 1883 | ptr = epos->bh->b_data + epos->offset; |
1da177e4 | 1884 | |
48d6d8ff | 1885 | switch (iinfo->i_alloc_type) { |
cb00ea35 | 1886 | case ICBTAG_FLAG_AD_SHORT: |
5ca4e4be | 1887 | sad = (struct short_ad *)ptr; |
28de7948 | 1888 | sad->extLength = cpu_to_le32(elen); |
97e961fd | 1889 | sad->extPosition = cpu_to_le32(eloc->logicalBlockNum); |
5ca4e4be | 1890 | adsize = sizeof(struct short_ad); |
28de7948 | 1891 | break; |
cb00ea35 | 1892 | case ICBTAG_FLAG_AD_LONG: |
5ca4e4be | 1893 | lad = (struct long_ad *)ptr; |
28de7948 | 1894 | lad->extLength = cpu_to_le32(elen); |
97e961fd | 1895 | lad->extLocation = cpu_to_lelb(*eloc); |
28de7948 | 1896 | memset(lad->impUse, 0x00, sizeof(lad->impUse)); |
5ca4e4be | 1897 | adsize = sizeof(struct long_ad); |
28de7948 | 1898 | break; |
cb00ea35 | 1899 | default: |
7e49b6f2 | 1900 | return; |
1da177e4 LT |
1901 | } |
1902 | ||
cb00ea35 | 1903 | if (epos->bh) { |
28de7948 | 1904 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
6c79e987 | 1905 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) { |
4b11111a MS |
1906 | struct allocExtDesc *aed = |
1907 | (struct allocExtDesc *)epos->bh->b_data; | |
ff116fc8 | 1908 | udf_update_tag(epos->bh->b_data, |
4b11111a MS |
1909 | le32_to_cpu(aed->lengthAllocDescs) + |
1910 | sizeof(struct allocExtDesc)); | |
1da177e4 | 1911 | } |
ff116fc8 | 1912 | mark_buffer_dirty_inode(epos->bh, inode); |
28de7948 | 1913 | } else { |
1da177e4 | 1914 | mark_inode_dirty(inode); |
28de7948 | 1915 | } |
1da177e4 LT |
1916 | |
1917 | if (inc) | |
ff116fc8 | 1918 | epos->offset += adsize; |
1da177e4 LT |
1919 | } |
1920 | ||
4b11111a | 1921 | int8_t udf_next_aext(struct inode *inode, struct extent_position *epos, |
5ca4e4be | 1922 | struct kernel_lb_addr *eloc, uint32_t *elen, int inc) |
1da177e4 LT |
1923 | { |
1924 | int8_t etype; | |
1925 | ||
ff116fc8 | 1926 | while ((etype = udf_current_aext(inode, epos, eloc, elen, inc)) == |
cb00ea35 | 1927 | (EXT_NEXT_EXTENT_ALLOCDECS >> 30)) { |
4b11111a | 1928 | int block; |
ff116fc8 JK |
1929 | epos->block = *eloc; |
1930 | epos->offset = sizeof(struct allocExtDesc); | |
3bf25cb4 | 1931 | brelse(epos->bh); |
97e961fd | 1932 | block = udf_get_lb_pblock(inode->i_sb, &epos->block, 0); |
4b11111a MS |
1933 | epos->bh = udf_tread(inode->i_sb, block); |
1934 | if (!epos->bh) { | |
1935 | udf_debug("reading block %d failed!\n", block); | |
1da177e4 LT |
1936 | return -1; |
1937 | } | |
1938 | } | |
1939 | ||
1940 | return etype; | |
1941 | } | |
1942 | ||
4b11111a | 1943 | int8_t udf_current_aext(struct inode *inode, struct extent_position *epos, |
5ca4e4be | 1944 | struct kernel_lb_addr *eloc, uint32_t *elen, int inc) |
1da177e4 LT |
1945 | { |
1946 | int alen; | |
1947 | int8_t etype; | |
1948 | uint8_t *ptr; | |
5ca4e4be PE |
1949 | struct short_ad *sad; |
1950 | struct long_ad *lad; | |
48d6d8ff | 1951 | struct udf_inode_info *iinfo = UDF_I(inode); |
28de7948 | 1952 | |
cb00ea35 | 1953 | if (!epos->bh) { |
ff116fc8 JK |
1954 | if (!epos->offset) |
1955 | epos->offset = udf_file_entry_alloc_offset(inode); | |
48d6d8ff | 1956 | ptr = iinfo->i_ext.i_data + epos->offset - |
4b11111a | 1957 | udf_file_entry_alloc_offset(inode) + |
48d6d8ff | 1958 | iinfo->i_lenEAttr; |
4b11111a | 1959 | alen = udf_file_entry_alloc_offset(inode) + |
48d6d8ff | 1960 | iinfo->i_lenAlloc; |
cb00ea35 | 1961 | } else { |
ff116fc8 JK |
1962 | if (!epos->offset) |
1963 | epos->offset = sizeof(struct allocExtDesc); | |
1964 | ptr = epos->bh->b_data + epos->offset; | |
28de7948 | 1965 | alen = sizeof(struct allocExtDesc) + |
4b11111a MS |
1966 | le32_to_cpu(((struct allocExtDesc *)epos->bh->b_data)-> |
1967 | lengthAllocDescs); | |
1da177e4 LT |
1968 | } |
1969 | ||
48d6d8ff | 1970 | switch (iinfo->i_alloc_type) { |
cb00ea35 | 1971 | case ICBTAG_FLAG_AD_SHORT: |
4b11111a MS |
1972 | sad = udf_get_fileshortad(ptr, alen, &epos->offset, inc); |
1973 | if (!sad) | |
28de7948 CG |
1974 | return -1; |
1975 | etype = le32_to_cpu(sad->extLength) >> 30; | |
1976 | eloc->logicalBlockNum = le32_to_cpu(sad->extPosition); | |
4b11111a | 1977 | eloc->partitionReferenceNum = |
48d6d8ff | 1978 | iinfo->i_location.partitionReferenceNum; |
28de7948 CG |
1979 | *elen = le32_to_cpu(sad->extLength) & UDF_EXTENT_LENGTH_MASK; |
1980 | break; | |
cb00ea35 | 1981 | case ICBTAG_FLAG_AD_LONG: |
4b11111a MS |
1982 | lad = udf_get_filelongad(ptr, alen, &epos->offset, inc); |
1983 | if (!lad) | |
1da177e4 | 1984 | return -1; |
28de7948 CG |
1985 | etype = le32_to_cpu(lad->extLength) >> 30; |
1986 | *eloc = lelb_to_cpu(lad->extLocation); | |
1987 | *elen = le32_to_cpu(lad->extLength) & UDF_EXTENT_LENGTH_MASK; | |
1988 | break; | |
1989 | default: | |
a983f368 | 1990 | udf_debug("alloc_type = %d unsupported\n", iinfo->i_alloc_type); |
28de7948 | 1991 | return -1; |
1da177e4 LT |
1992 | } |
1993 | ||
1994 | return etype; | |
1995 | } | |
1996 | ||
28de7948 | 1997 | static int8_t udf_insert_aext(struct inode *inode, struct extent_position epos, |
5ca4e4be | 1998 | struct kernel_lb_addr neloc, uint32_t nelen) |
1da177e4 | 1999 | { |
5ca4e4be | 2000 | struct kernel_lb_addr oeloc; |
1da177e4 LT |
2001 | uint32_t oelen; |
2002 | int8_t etype; | |
2003 | ||
ff116fc8 | 2004 | if (epos.bh) |
3bf25cb4 | 2005 | get_bh(epos.bh); |
1da177e4 | 2006 | |
cb00ea35 | 2007 | while ((etype = udf_next_aext(inode, &epos, &oeloc, &oelen, 0)) != -1) { |
97e961fd | 2008 | udf_write_aext(inode, &epos, &neloc, nelen, 1); |
1da177e4 LT |
2009 | neloc = oeloc; |
2010 | nelen = (etype << 30) | oelen; | |
2011 | } | |
97e961fd | 2012 | udf_add_aext(inode, &epos, &neloc, nelen, 1); |
3bf25cb4 | 2013 | brelse(epos.bh); |
28de7948 | 2014 | |
1da177e4 LT |
2015 | return (nelen >> 30); |
2016 | } | |
2017 | ||
4b11111a | 2018 | int8_t udf_delete_aext(struct inode *inode, struct extent_position epos, |
5ca4e4be | 2019 | struct kernel_lb_addr eloc, uint32_t elen) |
1da177e4 | 2020 | { |
ff116fc8 JK |
2021 | struct extent_position oepos; |
2022 | int adsize; | |
1da177e4 LT |
2023 | int8_t etype; |
2024 | struct allocExtDesc *aed; | |
48d6d8ff | 2025 | struct udf_inode_info *iinfo; |
1da177e4 | 2026 | |
cb00ea35 | 2027 | if (epos.bh) { |
3bf25cb4 JK |
2028 | get_bh(epos.bh); |
2029 | get_bh(epos.bh); | |
1da177e4 LT |
2030 | } |
2031 | ||
48d6d8ff MS |
2032 | iinfo = UDF_I(inode); |
2033 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) | |
5ca4e4be | 2034 | adsize = sizeof(struct short_ad); |
48d6d8ff | 2035 | else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
5ca4e4be | 2036 | adsize = sizeof(struct long_ad); |
1da177e4 LT |
2037 | else |
2038 | adsize = 0; | |
2039 | ||
ff116fc8 JK |
2040 | oepos = epos; |
2041 | if (udf_next_aext(inode, &epos, &eloc, &elen, 1) == -1) | |
1da177e4 LT |
2042 | return -1; |
2043 | ||
cb00ea35 | 2044 | while ((etype = udf_next_aext(inode, &epos, &eloc, &elen, 1)) != -1) { |
97e961fd | 2045 | udf_write_aext(inode, &oepos, &eloc, (etype << 30) | elen, 1); |
cb00ea35 | 2046 | if (oepos.bh != epos.bh) { |
ff116fc8 | 2047 | oepos.block = epos.block; |
3bf25cb4 JK |
2048 | brelse(oepos.bh); |
2049 | get_bh(epos.bh); | |
ff116fc8 JK |
2050 | oepos.bh = epos.bh; |
2051 | oepos.offset = epos.offset - adsize; | |
1da177e4 LT |
2052 | } |
2053 | } | |
5ca4e4be | 2054 | memset(&eloc, 0x00, sizeof(struct kernel_lb_addr)); |
1da177e4 LT |
2055 | elen = 0; |
2056 | ||
cb00ea35 | 2057 | if (epos.bh != oepos.bh) { |
97e961fd PE |
2058 | udf_free_blocks(inode->i_sb, inode, &epos.block, 0, 1); |
2059 | udf_write_aext(inode, &oepos, &eloc, elen, 1); | |
2060 | udf_write_aext(inode, &oepos, &eloc, elen, 1); | |
cb00ea35 | 2061 | if (!oepos.bh) { |
48d6d8ff | 2062 | iinfo->i_lenAlloc -= (adsize * 2); |
1da177e4 | 2063 | mark_inode_dirty(inode); |
cb00ea35 | 2064 | } else { |
ff116fc8 | 2065 | aed = (struct allocExtDesc *)oepos.bh->b_data; |
c2104fda | 2066 | le32_add_cpu(&aed->lengthAllocDescs, -(2 * adsize)); |
28de7948 | 2067 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
6c79e987 | 2068 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) |
4b11111a MS |
2069 | udf_update_tag(oepos.bh->b_data, |
2070 | oepos.offset - (2 * adsize)); | |
1da177e4 | 2071 | else |
4b11111a MS |
2072 | udf_update_tag(oepos.bh->b_data, |
2073 | sizeof(struct allocExtDesc)); | |
ff116fc8 | 2074 | mark_buffer_dirty_inode(oepos.bh, inode); |
1da177e4 | 2075 | } |
cb00ea35 | 2076 | } else { |
97e961fd | 2077 | udf_write_aext(inode, &oepos, &eloc, elen, 1); |
cb00ea35 | 2078 | if (!oepos.bh) { |
48d6d8ff | 2079 | iinfo->i_lenAlloc -= adsize; |
1da177e4 | 2080 | mark_inode_dirty(inode); |
cb00ea35 | 2081 | } else { |
ff116fc8 | 2082 | aed = (struct allocExtDesc *)oepos.bh->b_data; |
c2104fda | 2083 | le32_add_cpu(&aed->lengthAllocDescs, -adsize); |
28de7948 | 2084 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
6c79e987 | 2085 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) |
4b11111a MS |
2086 | udf_update_tag(oepos.bh->b_data, |
2087 | epos.offset - adsize); | |
1da177e4 | 2088 | else |
4b11111a MS |
2089 | udf_update_tag(oepos.bh->b_data, |
2090 | sizeof(struct allocExtDesc)); | |
ff116fc8 | 2091 | mark_buffer_dirty_inode(oepos.bh, inode); |
1da177e4 LT |
2092 | } |
2093 | } | |
647bd61a | 2094 | |
3bf25cb4 JK |
2095 | brelse(epos.bh); |
2096 | brelse(oepos.bh); | |
28de7948 | 2097 | |
1da177e4 LT |
2098 | return (elen >> 30); |
2099 | } | |
2100 | ||
4b11111a | 2101 | int8_t inode_bmap(struct inode *inode, sector_t block, |
5ca4e4be | 2102 | struct extent_position *pos, struct kernel_lb_addr *eloc, |
4b11111a | 2103 | uint32_t *elen, sector_t *offset) |
1da177e4 | 2104 | { |
4b11111a | 2105 | unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; |
cb00ea35 | 2106 | loff_t lbcount = 0, bcount = |
4b11111a | 2107 | (loff_t) block << blocksize_bits; |
1da177e4 | 2108 | int8_t etype; |
48d6d8ff | 2109 | struct udf_inode_info *iinfo; |
1da177e4 | 2110 | |
48d6d8ff | 2111 | iinfo = UDF_I(inode); |
ff116fc8 | 2112 | pos->offset = 0; |
48d6d8ff | 2113 | pos->block = iinfo->i_location; |
ff116fc8 | 2114 | pos->bh = NULL; |
1da177e4 | 2115 | *elen = 0; |
1da177e4 | 2116 | |
cb00ea35 | 2117 | do { |
4b11111a MS |
2118 | etype = udf_next_aext(inode, pos, eloc, elen, 1); |
2119 | if (etype == -1) { | |
2120 | *offset = (bcount - lbcount) >> blocksize_bits; | |
48d6d8ff | 2121 | iinfo->i_lenExtents = lbcount; |
1da177e4 LT |
2122 | return -1; |
2123 | } | |
2124 | lbcount += *elen; | |
2125 | } while (lbcount <= bcount); | |
2126 | ||
4b11111a | 2127 | *offset = (bcount + *elen - lbcount) >> blocksize_bits; |
1da177e4 LT |
2128 | |
2129 | return etype; | |
2130 | } | |
2131 | ||
60448b1d | 2132 | long udf_block_map(struct inode *inode, sector_t block) |
1da177e4 | 2133 | { |
5ca4e4be | 2134 | struct kernel_lb_addr eloc; |
ff116fc8 | 2135 | uint32_t elen; |
60448b1d | 2136 | sector_t offset; |
28de7948 | 2137 | struct extent_position epos = {}; |
1da177e4 LT |
2138 | int ret; |
2139 | ||
4d0fb621 | 2140 | down_read(&UDF_I(inode)->i_data_sem); |
1da177e4 | 2141 | |
4b11111a MS |
2142 | if (inode_bmap(inode, block, &epos, &eloc, &elen, &offset) == |
2143 | (EXT_RECORDED_ALLOCATED >> 30)) | |
97e961fd | 2144 | ret = udf_get_lb_pblock(inode->i_sb, &eloc, offset); |
1da177e4 LT |
2145 | else |
2146 | ret = 0; | |
2147 | ||
4d0fb621 | 2148 | up_read(&UDF_I(inode)->i_data_sem); |
3bf25cb4 | 2149 | brelse(epos.bh); |
1da177e4 LT |
2150 | |
2151 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_VARCONV)) | |
2152 | return udf_fixed_to_variable(ret); | |
2153 | else | |
2154 | return ret; | |
2155 | } |