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> | |
1da177e4 LT |
36 | #include <linux/writeback.h> |
37 | #include <linux/slab.h> | |
f845fced | 38 | #include <linux/crc-itu-t.h> |
bc112323 | 39 | #include <linux/mpage.h> |
e2e40f2c | 40 | #include <linux/uio.h> |
2f8b5444 | 41 | #include <linux/bio.h> |
1da177e4 LT |
42 | |
43 | #include "udf_i.h" | |
44 | #include "udf_sb.h" | |
45 | ||
1da177e4 LT |
46 | #define EXTENT_MERGE_SIZE 5 |
47 | ||
c3367a1b SM |
48 | #define FE_MAPPED_PERMS (FE_PERM_U_READ | FE_PERM_U_WRITE | FE_PERM_U_EXEC | \ |
49 | FE_PERM_G_READ | FE_PERM_G_WRITE | FE_PERM_G_EXEC | \ | |
50 | FE_PERM_O_READ | FE_PERM_O_WRITE | FE_PERM_O_EXEC) | |
51 | ||
52 | #define FE_DELETE_PERMS (FE_PERM_U_DELETE | FE_PERM_G_DELETE | \ | |
53 | FE_PERM_O_DELETE) | |
54 | ||
faa17292 | 55 | static umode_t udf_convert_permissions(struct fileEntry *); |
1da177e4 | 56 | static int udf_update_inode(struct inode *, int); |
49521de1 | 57 | static int udf_sync_inode(struct inode *inode); |
647bd61a | 58 | static int udf_alloc_i_data(struct inode *inode, size_t size); |
7b0b0933 | 59 | static sector_t inode_getblk(struct inode *, sector_t, int *, int *); |
ff116fc8 | 60 | static int8_t udf_insert_aext(struct inode *, struct extent_position, |
5ca4e4be | 61 | struct kernel_lb_addr, uint32_t); |
b490bdd6 | 62 | static void udf_split_extents(struct inode *, int *, int, udf_pblk_t, |
3cc6f844 | 63 | struct kernel_long_ad *, int *); |
1da177e4 | 64 | static void udf_prealloc_extents(struct inode *, int, int, |
3cc6f844 FF |
65 | struct kernel_long_ad *, int *); |
66 | static void udf_merge_extents(struct inode *, struct kernel_long_ad *, int *); | |
67 | static void udf_update_extents(struct inode *, struct kernel_long_ad *, int, | |
68 | int, struct extent_position *); | |
1da177e4 LT |
69 | static int udf_get_block(struct inode *, sector_t, struct buffer_head *, int); |
70 | ||
99600051 NJ |
71 | static void __udf_clear_extent_cache(struct inode *inode) |
72 | { | |
73 | struct udf_inode_info *iinfo = UDF_I(inode); | |
74 | ||
75 | if (iinfo->cached_extent.lstart != -1) { | |
76 | brelse(iinfo->cached_extent.epos.bh); | |
77 | iinfo->cached_extent.lstart = -1; | |
78 | } | |
79 | } | |
80 | ||
81 | /* Invalidate extent cache */ | |
82 | static void udf_clear_extent_cache(struct inode *inode) | |
83 | { | |
84 | struct udf_inode_info *iinfo = UDF_I(inode); | |
85 | ||
86 | spin_lock(&iinfo->i_extent_cache_lock); | |
87 | __udf_clear_extent_cache(inode); | |
88 | spin_unlock(&iinfo->i_extent_cache_lock); | |
89 | } | |
90 | ||
91 | /* Return contents of extent cache */ | |
92 | static int udf_read_extent_cache(struct inode *inode, loff_t bcount, | |
93 | loff_t *lbcount, struct extent_position *pos) | |
94 | { | |
95 | struct udf_inode_info *iinfo = UDF_I(inode); | |
96 | int ret = 0; | |
97 | ||
98 | spin_lock(&iinfo->i_extent_cache_lock); | |
99 | if ((iinfo->cached_extent.lstart <= bcount) && | |
100 | (iinfo->cached_extent.lstart != -1)) { | |
101 | /* Cache hit */ | |
102 | *lbcount = iinfo->cached_extent.lstart; | |
103 | memcpy(pos, &iinfo->cached_extent.epos, | |
104 | sizeof(struct extent_position)); | |
105 | if (pos->bh) | |
106 | get_bh(pos->bh); | |
107 | ret = 1; | |
108 | } | |
109 | spin_unlock(&iinfo->i_extent_cache_lock); | |
110 | return ret; | |
111 | } | |
112 | ||
113 | /* Add extent to extent cache */ | |
114 | static void udf_update_extent_cache(struct inode *inode, loff_t estart, | |
b31c9ed9 | 115 | struct extent_position *pos) |
99600051 NJ |
116 | { |
117 | struct udf_inode_info *iinfo = UDF_I(inode); | |
118 | ||
119 | spin_lock(&iinfo->i_extent_cache_lock); | |
120 | /* Invalidate previously cached extent */ | |
121 | __udf_clear_extent_cache(inode); | |
122 | if (pos->bh) | |
123 | get_bh(pos->bh); | |
033c9da0 | 124 | memcpy(&iinfo->cached_extent.epos, pos, sizeof(*pos)); |
99600051 | 125 | iinfo->cached_extent.lstart = estart; |
b31c9ed9 FF |
126 | switch (iinfo->i_alloc_type) { |
127 | case ICBTAG_FLAG_AD_SHORT: | |
128 | iinfo->cached_extent.epos.offset -= sizeof(struct short_ad); | |
129 | break; | |
130 | case ICBTAG_FLAG_AD_LONG: | |
131 | iinfo->cached_extent.epos.offset -= sizeof(struct long_ad); | |
132 | break; | |
133 | } | |
99600051 NJ |
134 | spin_unlock(&iinfo->i_extent_cache_lock); |
135 | } | |
b1e32126 | 136 | |
3aac2b62 | 137 | void udf_evict_inode(struct inode *inode) |
1da177e4 | 138 | { |
2c948b3f | 139 | struct udf_inode_info *iinfo = UDF_I(inode); |
3aac2b62 AV |
140 | int want_delete = 0; |
141 | ||
3aac2b62 AV |
142 | if (!inode->i_nlink && !is_bad_inode(inode)) { |
143 | want_delete = 1; | |
7e49b6f2 | 144 | udf_setsize(inode, 0); |
3aac2b62 | 145 | udf_update_inode(inode, IS_SYNC(inode)); |
91b0abe3 JW |
146 | } |
147 | truncate_inode_pages_final(&inode->i_data); | |
3aac2b62 | 148 | invalidate_inode_buffers(inode); |
dbd5768f | 149 | clear_inode(inode); |
2c948b3f JK |
150 | if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB && |
151 | inode->i_size != iinfo->i_lenExtents) { | |
78ace70c JP |
152 | 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", |
153 | inode->i_ino, inode->i_mode, | |
154 | (unsigned long long)inode->i_size, | |
155 | (unsigned long long)iinfo->i_lenExtents); | |
1da177e4 | 156 | } |
48d6d8ff MS |
157 | kfree(iinfo->i_ext.i_data); |
158 | iinfo->i_ext.i_data = NULL; | |
99600051 | 159 | udf_clear_extent_cache(inode); |
3aac2b62 | 160 | if (want_delete) { |
3aac2b62 | 161 | udf_free_inode(inode); |
3aac2b62 | 162 | } |
1da177e4 LT |
163 | } |
164 | ||
5eec54fc IA |
165 | static void udf_write_failed(struct address_space *mapping, loff_t to) |
166 | { | |
167 | struct inode *inode = mapping->host; | |
168 | struct udf_inode_info *iinfo = UDF_I(inode); | |
169 | loff_t isize = inode->i_size; | |
170 | ||
171 | if (to > isize) { | |
7caef267 | 172 | truncate_pagecache(inode, isize); |
5eec54fc IA |
173 | if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { |
174 | down_write(&iinfo->i_data_sem); | |
99600051 | 175 | udf_clear_extent_cache(inode); |
5eec54fc IA |
176 | udf_truncate_extents(inode); |
177 | up_write(&iinfo->i_data_sem); | |
178 | } | |
179 | } | |
180 | } | |
181 | ||
1da177e4 LT |
182 | static int udf_writepage(struct page *page, struct writeback_control *wbc) |
183 | { | |
184 | return block_write_full_page(page, udf_get_block, wbc); | |
185 | } | |
186 | ||
378b8e1a NJ |
187 | static int udf_writepages(struct address_space *mapping, |
188 | struct writeback_control *wbc) | |
189 | { | |
190 | return mpage_writepages(mapping, wbc, udf_get_block); | |
191 | } | |
192 | ||
1da177e4 LT |
193 | static int udf_readpage(struct file *file, struct page *page) |
194 | { | |
bc112323 NJ |
195 | return mpage_readpage(page, udf_get_block); |
196 | } | |
197 | ||
198 | static int udf_readpages(struct file *file, struct address_space *mapping, | |
199 | struct list_head *pages, unsigned nr_pages) | |
200 | { | |
201 | return mpage_readpages(mapping, pages, nr_pages, udf_get_block); | |
1da177e4 LT |
202 | } |
203 | ||
be021ee4 NP |
204 | static int udf_write_begin(struct file *file, struct address_space *mapping, |
205 | loff_t pos, unsigned len, unsigned flags, | |
206 | struct page **pagep, void **fsdata) | |
1da177e4 | 207 | { |
155130a4 CH |
208 | int ret; |
209 | ||
210 | ret = block_write_begin(mapping, pos, len, flags, pagep, udf_get_block); | |
5eec54fc IA |
211 | if (unlikely(ret)) |
212 | udf_write_failed(mapping, pos + len); | |
213 | return ret; | |
214 | } | |
155130a4 | 215 | |
c8b8e32d | 216 | static ssize_t udf_direct_IO(struct kiocb *iocb, struct iov_iter *iter) |
5eec54fc IA |
217 | { |
218 | struct file *file = iocb->ki_filp; | |
219 | struct address_space *mapping = file->f_mapping; | |
220 | struct inode *inode = mapping->host; | |
a6cbcd4a | 221 | size_t count = iov_iter_count(iter); |
5eec54fc IA |
222 | ssize_t ret; |
223 | ||
c8b8e32d | 224 | ret = blockdev_direct_IO(iocb, inode, iter, udf_get_block); |
6f673763 | 225 | if (unlikely(ret < 0 && iov_iter_rw(iter) == WRITE)) |
c8b8e32d | 226 | udf_write_failed(mapping, iocb->ki_pos + count); |
155130a4 | 227 | return ret; |
1da177e4 LT |
228 | } |
229 | ||
230 | static sector_t udf_bmap(struct address_space *mapping, sector_t block) | |
231 | { | |
cb00ea35 | 232 | return generic_block_bmap(mapping, block, udf_get_block); |
1da177e4 LT |
233 | } |
234 | ||
f5e54d6e | 235 | const struct address_space_operations udf_aops = { |
28de7948 | 236 | .readpage = udf_readpage, |
bc112323 | 237 | .readpages = udf_readpages, |
28de7948 | 238 | .writepage = udf_writepage, |
378b8e1a | 239 | .writepages = udf_writepages, |
5eec54fc IA |
240 | .write_begin = udf_write_begin, |
241 | .write_end = generic_write_end, | |
242 | .direct_IO = udf_direct_IO, | |
28de7948 | 243 | .bmap = udf_bmap, |
1da177e4 LT |
244 | }; |
245 | ||
d2eb8c35 JK |
246 | /* |
247 | * Expand file stored in ICB to a normal one-block-file | |
248 | * | |
249 | * This function requires i_data_sem for writing and releases it. | |
250 | * This function requires i_mutex held | |
251 | */ | |
7e49b6f2 | 252 | int udf_expand_file_adinicb(struct inode *inode) |
1da177e4 LT |
253 | { |
254 | struct page *page; | |
255 | char *kaddr; | |
48d6d8ff | 256 | struct udf_inode_info *iinfo = UDF_I(inode); |
7e49b6f2 | 257 | int err; |
1da177e4 LT |
258 | struct writeback_control udf_wbc = { |
259 | .sync_mode = WB_SYNC_NONE, | |
260 | .nr_to_write = 1, | |
261 | }; | |
262 | ||
5955102c | 263 | WARN_ON_ONCE(!inode_is_locked(inode)); |
48d6d8ff | 264 | if (!iinfo->i_lenAlloc) { |
1da177e4 | 265 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) |
48d6d8ff | 266 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT; |
1da177e4 | 267 | else |
48d6d8ff | 268 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG; |
7e49b6f2 JK |
269 | /* from now on we have normal address_space methods */ |
270 | inode->i_data.a_ops = &udf_aops; | |
d2eb8c35 | 271 | up_write(&iinfo->i_data_sem); |
1da177e4 | 272 | mark_inode_dirty(inode); |
7e49b6f2 | 273 | return 0; |
1da177e4 | 274 | } |
d2eb8c35 JK |
275 | /* |
276 | * Release i_data_sem so that we can lock a page - page lock ranks | |
277 | * above i_data_sem. i_mutex still protects us against file changes. | |
278 | */ | |
279 | up_write(&iinfo->i_data_sem); | |
1da177e4 | 280 | |
7e49b6f2 JK |
281 | page = find_or_create_page(inode->i_mapping, 0, GFP_NOFS); |
282 | if (!page) | |
283 | return -ENOMEM; | |
cd7619d6 | 284 | |
cb00ea35 | 285 | if (!PageUptodate(page)) { |
5c26eac4 | 286 | kaddr = kmap_atomic(page); |
48d6d8ff | 287 | memset(kaddr + iinfo->i_lenAlloc, 0x00, |
09cbfeaf | 288 | PAGE_SIZE - iinfo->i_lenAlloc); |
48d6d8ff MS |
289 | memcpy(kaddr, iinfo->i_ext.i_data + iinfo->i_lenEAttr, |
290 | iinfo->i_lenAlloc); | |
1da177e4 LT |
291 | flush_dcache_page(page); |
292 | SetPageUptodate(page); | |
5c26eac4 | 293 | kunmap_atomic(kaddr); |
1da177e4 | 294 | } |
d2eb8c35 | 295 | down_write(&iinfo->i_data_sem); |
48d6d8ff MS |
296 | memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr, 0x00, |
297 | iinfo->i_lenAlloc); | |
298 | iinfo->i_lenAlloc = 0; | |
1da177e4 | 299 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) |
48d6d8ff | 300 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT; |
1da177e4 | 301 | else |
48d6d8ff | 302 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG; |
7e49b6f2 JK |
303 | /* from now on we have normal address_space methods */ |
304 | inode->i_data.a_ops = &udf_aops; | |
d2eb8c35 | 305 | up_write(&iinfo->i_data_sem); |
7e49b6f2 JK |
306 | err = inode->i_data.a_ops->writepage(page, &udf_wbc); |
307 | if (err) { | |
308 | /* Restore everything back so that we don't lose data... */ | |
309 | lock_page(page); | |
d2eb8c35 | 310 | down_write(&iinfo->i_data_sem); |
5c26eac4 | 311 | kaddr = kmap_atomic(page); |
7e49b6f2 JK |
312 | memcpy(iinfo->i_ext.i_data + iinfo->i_lenEAttr, kaddr, |
313 | inode->i_size); | |
5c26eac4 | 314 | kunmap_atomic(kaddr); |
7e49b6f2 JK |
315 | unlock_page(page); |
316 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB; | |
317 | inode->i_data.a_ops = &udf_adinicb_aops; | |
d2eb8c35 | 318 | up_write(&iinfo->i_data_sem); |
7e49b6f2 | 319 | } |
09cbfeaf | 320 | put_page(page); |
1da177e4 | 321 | mark_inode_dirty(inode); |
7e49b6f2 JK |
322 | |
323 | return err; | |
1da177e4 LT |
324 | } |
325 | ||
b490bdd6 SM |
326 | struct buffer_head *udf_expand_dir_adinicb(struct inode *inode, |
327 | udf_pblk_t *block, int *err) | |
1da177e4 | 328 | { |
b490bdd6 | 329 | udf_pblk_t newblock; |
ff116fc8 | 330 | struct buffer_head *dbh = NULL; |
5ca4e4be | 331 | struct kernel_lb_addr eloc; |
1da177e4 | 332 | uint8_t alloctype; |
ff116fc8 | 333 | struct extent_position epos; |
1da177e4 LT |
334 | |
335 | struct udf_fileident_bh sfibh, dfibh; | |
af793295 JK |
336 | loff_t f_pos = udf_ext0_offset(inode); |
337 | int size = udf_ext0_offset(inode) + inode->i_size; | |
1da177e4 | 338 | struct fileIdentDesc cfi, *sfi, *dfi; |
48d6d8ff | 339 | struct udf_inode_info *iinfo = UDF_I(inode); |
1da177e4 LT |
340 | |
341 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) | |
342 | alloctype = ICBTAG_FLAG_AD_SHORT; | |
343 | else | |
344 | alloctype = ICBTAG_FLAG_AD_LONG; | |
345 | ||
cb00ea35 | 346 | if (!inode->i_size) { |
48d6d8ff | 347 | iinfo->i_alloc_type = alloctype; |
1da177e4 LT |
348 | mark_inode_dirty(inode); |
349 | return NULL; | |
350 | } | |
351 | ||
352 | /* alloc block, and copy data to it */ | |
353 | *block = udf_new_block(inode->i_sb, inode, | |
48d6d8ff MS |
354 | iinfo->i_location.partitionReferenceNum, |
355 | iinfo->i_location.logicalBlockNum, err); | |
1da177e4 LT |
356 | if (!(*block)) |
357 | return NULL; | |
358 | newblock = udf_get_pblock(inode->i_sb, *block, | |
48d6d8ff | 359 | iinfo->i_location.partitionReferenceNum, |
c0b34438 | 360 | 0); |
1da177e4 LT |
361 | if (!newblock) |
362 | return NULL; | |
363 | dbh = udf_tgetblk(inode->i_sb, newblock); | |
364 | if (!dbh) | |
365 | return NULL; | |
366 | lock_buffer(dbh); | |
367 | memset(dbh->b_data, 0x00, inode->i_sb->s_blocksize); | |
368 | set_buffer_uptodate(dbh); | |
369 | unlock_buffer(dbh); | |
370 | mark_buffer_dirty_inode(dbh, inode); | |
371 | ||
4b11111a | 372 | sfibh.soffset = sfibh.eoffset = |
af793295 | 373 | f_pos & (inode->i_sb->s_blocksize - 1); |
ff116fc8 | 374 | sfibh.sbh = sfibh.ebh = NULL; |
1da177e4 LT |
375 | dfibh.soffset = dfibh.eoffset = 0; |
376 | dfibh.sbh = dfibh.ebh = dbh; | |
af793295 | 377 | while (f_pos < size) { |
48d6d8ff | 378 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB; |
4b11111a MS |
379 | sfi = udf_fileident_read(inode, &f_pos, &sfibh, &cfi, NULL, |
380 | NULL, NULL, NULL); | |
cb00ea35 | 381 | if (!sfi) { |
3bf25cb4 | 382 | brelse(dbh); |
1da177e4 LT |
383 | return NULL; |
384 | } | |
48d6d8ff | 385 | iinfo->i_alloc_type = alloctype; |
1da177e4 LT |
386 | sfi->descTag.tagLocation = cpu_to_le32(*block); |
387 | dfibh.soffset = dfibh.eoffset; | |
388 | dfibh.eoffset += (sfibh.eoffset - sfibh.soffset); | |
389 | dfi = (struct fileIdentDesc *)(dbh->b_data + dfibh.soffset); | |
390 | if (udf_write_fi(inode, sfi, dfi, &dfibh, sfi->impUse, | |
4b11111a MS |
391 | sfi->fileIdent + |
392 | le16_to_cpu(sfi->lengthOfImpUse))) { | |
48d6d8ff | 393 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB; |
3bf25cb4 | 394 | brelse(dbh); |
1da177e4 LT |
395 | return NULL; |
396 | } | |
397 | } | |
398 | mark_buffer_dirty_inode(dbh, inode); | |
399 | ||
48d6d8ff MS |
400 | memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr, 0, |
401 | iinfo->i_lenAlloc); | |
402 | iinfo->i_lenAlloc = 0; | |
1da177e4 | 403 | eloc.logicalBlockNum = *block; |
4b11111a | 404 | eloc.partitionReferenceNum = |
48d6d8ff | 405 | iinfo->i_location.partitionReferenceNum; |
2c948b3f | 406 | iinfo->i_lenExtents = inode->i_size; |
ff116fc8 | 407 | epos.bh = NULL; |
48d6d8ff | 408 | epos.block = iinfo->i_location; |
ff116fc8 | 409 | epos.offset = udf_file_entry_alloc_offset(inode); |
2c948b3f | 410 | udf_add_aext(inode, &epos, &eloc, inode->i_size, 0); |
1da177e4 LT |
411 | /* UniqueID stuff */ |
412 | ||
3bf25cb4 | 413 | brelse(epos.bh); |
1da177e4 LT |
414 | mark_inode_dirty(inode); |
415 | return dbh; | |
416 | } | |
417 | ||
cb00ea35 CG |
418 | static int udf_get_block(struct inode *inode, sector_t block, |
419 | struct buffer_head *bh_result, int create) | |
1da177e4 LT |
420 | { |
421 | int err, new; | |
1ed16171 | 422 | sector_t phys = 0; |
48d6d8ff | 423 | struct udf_inode_info *iinfo; |
1da177e4 | 424 | |
cb00ea35 | 425 | if (!create) { |
1da177e4 LT |
426 | phys = udf_block_map(inode, block); |
427 | if (phys) | |
428 | map_bh(bh_result, inode->i_sb, phys); | |
429 | return 0; | |
430 | } | |
431 | ||
432 | err = -EIO; | |
433 | new = 0; | |
48d6d8ff | 434 | iinfo = UDF_I(inode); |
4d0fb621 AIB |
435 | |
436 | down_write(&iinfo->i_data_sem); | |
48d6d8ff MS |
437 | if (block == iinfo->i_next_alloc_block + 1) { |
438 | iinfo->i_next_alloc_block++; | |
439 | iinfo->i_next_alloc_goal++; | |
1da177e4 LT |
440 | } |
441 | ||
99600051 | 442 | udf_clear_extent_cache(inode); |
7b0b0933 JK |
443 | phys = inode_getblk(inode, block, &err, &new); |
444 | if (!phys) | |
1da177e4 | 445 | goto abort; |
1da177e4 LT |
446 | |
447 | if (new) | |
448 | set_buffer_new(bh_result); | |
449 | map_bh(bh_result, inode->i_sb, phys); | |
28de7948 CG |
450 | |
451 | abort: | |
4d0fb621 | 452 | up_write(&iinfo->i_data_sem); |
1da177e4 | 453 | return err; |
1da177e4 LT |
454 | } |
455 | ||
b490bdd6 | 456 | static struct buffer_head *udf_getblk(struct inode *inode, udf_pblk_t block, |
cb00ea35 | 457 | int create, int *err) |
1da177e4 | 458 | { |
28de7948 | 459 | struct buffer_head *bh; |
1da177e4 LT |
460 | struct buffer_head dummy; |
461 | ||
462 | dummy.b_state = 0; | |
463 | dummy.b_blocknr = -1000; | |
464 | *err = udf_get_block(inode, block, &dummy, create); | |
cb00ea35 | 465 | if (!*err && buffer_mapped(&dummy)) { |
1da177e4 | 466 | bh = sb_getblk(inode->i_sb, dummy.b_blocknr); |
cb00ea35 | 467 | if (buffer_new(&dummy)) { |
1da177e4 LT |
468 | lock_buffer(bh); |
469 | memset(bh->b_data, 0x00, inode->i_sb->s_blocksize); | |
470 | set_buffer_uptodate(bh); | |
471 | unlock_buffer(bh); | |
472 | mark_buffer_dirty_inode(bh, inode); | |
473 | } | |
474 | return bh; | |
475 | } | |
28de7948 | 476 | |
1da177e4 LT |
477 | return NULL; |
478 | } | |
479 | ||
fa33cdbf SM |
480 | /* Extend the file with new blocks totaling 'new_block_bytes', |
481 | * return the number of extents added | |
482 | */ | |
7e49b6f2 JK |
483 | static int udf_do_extend_file(struct inode *inode, |
484 | struct extent_position *last_pos, | |
485 | struct kernel_long_ad *last_ext, | |
fa33cdbf | 486 | loff_t new_block_bytes) |
31170b6a | 487 | { |
fa33cdbf | 488 | uint32_t add; |
31170b6a JK |
489 | int count = 0, fake = !(last_ext->extLength & UDF_EXTENT_LENGTH_MASK); |
490 | struct super_block *sb = inode->i_sb; | |
5ca4e4be | 491 | struct kernel_lb_addr prealloc_loc = {}; |
89a4d970 | 492 | uint32_t prealloc_len = 0; |
48d6d8ff | 493 | struct udf_inode_info *iinfo; |
7e49b6f2 | 494 | int err; |
31170b6a JK |
495 | |
496 | /* The previous extent is fake and we should not extend by anything | |
497 | * - there's nothing to do... */ | |
fa33cdbf | 498 | if (!new_block_bytes && fake) |
31170b6a | 499 | return 0; |
28de7948 | 500 | |
48d6d8ff | 501 | iinfo = UDF_I(inode); |
31170b6a JK |
502 | /* Round the last extent up to a multiple of block size */ |
503 | if (last_ext->extLength & (sb->s_blocksize - 1)) { | |
504 | last_ext->extLength = | |
28de7948 CG |
505 | (last_ext->extLength & UDF_EXTENT_FLAG_MASK) | |
506 | (((last_ext->extLength & UDF_EXTENT_LENGTH_MASK) + | |
507 | sb->s_blocksize - 1) & ~(sb->s_blocksize - 1)); | |
48d6d8ff MS |
508 | iinfo->i_lenExtents = |
509 | (iinfo->i_lenExtents + sb->s_blocksize - 1) & | |
28de7948 | 510 | ~(sb->s_blocksize - 1); |
31170b6a | 511 | } |
28de7948 | 512 | |
31170b6a | 513 | /* Last extent are just preallocated blocks? */ |
4b11111a MS |
514 | if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) == |
515 | EXT_NOT_RECORDED_ALLOCATED) { | |
31170b6a JK |
516 | /* Save the extent so that we can reattach it to the end */ |
517 | prealloc_loc = last_ext->extLocation; | |
518 | prealloc_len = last_ext->extLength; | |
519 | /* Mark the extent as a hole */ | |
520 | last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | | |
28de7948 | 521 | (last_ext->extLength & UDF_EXTENT_LENGTH_MASK); |
31170b6a | 522 | last_ext->extLocation.logicalBlockNum = 0; |
4b11111a | 523 | last_ext->extLocation.partitionReferenceNum = 0; |
31170b6a | 524 | } |
28de7948 | 525 | |
31170b6a | 526 | /* Can we merge with the previous extent? */ |
4b11111a MS |
527 | if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) == |
528 | EXT_NOT_RECORDED_NOT_ALLOCATED) { | |
fa33cdbf SM |
529 | add = (1 << 30) - sb->s_blocksize - |
530 | (last_ext->extLength & UDF_EXTENT_LENGTH_MASK); | |
531 | if (add > new_block_bytes) | |
532 | add = new_block_bytes; | |
533 | new_block_bytes -= add; | |
534 | last_ext->extLength += add; | |
31170b6a JK |
535 | } |
536 | ||
537 | if (fake) { | |
97e961fd | 538 | udf_add_aext(inode, last_pos, &last_ext->extLocation, |
cb00ea35 | 539 | last_ext->extLength, 1); |
31170b6a | 540 | count++; |
6c371578 JK |
541 | } else { |
542 | struct kernel_lb_addr tmploc; | |
543 | uint32_t tmplen; | |
544 | ||
97e961fd | 545 | udf_write_aext(inode, last_pos, &last_ext->extLocation, |
4b11111a | 546 | last_ext->extLength, 1); |
6c371578 JK |
547 | /* |
548 | * We've rewritten the last extent but there may be empty | |
549 | * indirect extent after it - enter it. | |
550 | */ | |
551 | udf_next_aext(inode, last_pos, &tmploc, &tmplen, 0); | |
552 | } | |
28de7948 | 553 | |
31170b6a | 554 | /* Managed to do everything necessary? */ |
fa33cdbf | 555 | if (!new_block_bytes) |
31170b6a JK |
556 | goto out; |
557 | ||
558 | /* All further extents will be NOT_RECORDED_NOT_ALLOCATED */ | |
559 | last_ext->extLocation.logicalBlockNum = 0; | |
4b11111a | 560 | last_ext->extLocation.partitionReferenceNum = 0; |
fa33cdbf SM |
561 | add = (1 << 30) - sb->s_blocksize; |
562 | last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | add; | |
28de7948 | 563 | |
31170b6a | 564 | /* Create enough extents to cover the whole hole */ |
fa33cdbf SM |
565 | while (new_block_bytes > add) { |
566 | new_block_bytes -= add; | |
7e49b6f2 JK |
567 | err = udf_add_aext(inode, last_pos, &last_ext->extLocation, |
568 | last_ext->extLength, 1); | |
569 | if (err) | |
570 | return err; | |
31170b6a JK |
571 | count++; |
572 | } | |
fa33cdbf | 573 | if (new_block_bytes) { |
31170b6a | 574 | last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | |
fa33cdbf | 575 | new_block_bytes; |
7e49b6f2 JK |
576 | err = udf_add_aext(inode, last_pos, &last_ext->extLocation, |
577 | last_ext->extLength, 1); | |
578 | if (err) | |
579 | return err; | |
31170b6a JK |
580 | count++; |
581 | } | |
28de7948 CG |
582 | |
583 | out: | |
31170b6a JK |
584 | /* Do we have some preallocated blocks saved? */ |
585 | if (prealloc_len) { | |
7e49b6f2 JK |
586 | err = udf_add_aext(inode, last_pos, &prealloc_loc, |
587 | prealloc_len, 1); | |
588 | if (err) | |
589 | return err; | |
31170b6a JK |
590 | last_ext->extLocation = prealloc_loc; |
591 | last_ext->extLength = prealloc_len; | |
592 | count++; | |
593 | } | |
28de7948 | 594 | |
31170b6a | 595 | /* last_pos should point to the last written extent... */ |
48d6d8ff | 596 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
5ca4e4be | 597 | last_pos->offset -= sizeof(struct short_ad); |
48d6d8ff | 598 | else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
5ca4e4be | 599 | last_pos->offset -= sizeof(struct long_ad); |
31170b6a | 600 | else |
7e49b6f2 | 601 | return -EIO; |
28de7948 | 602 | |
31170b6a JK |
603 | return count; |
604 | } | |
605 | ||
fa33cdbf SM |
606 | /* Extend the final block of the file to final_block_len bytes */ |
607 | static void udf_do_extend_final_block(struct inode *inode, | |
608 | struct extent_position *last_pos, | |
609 | struct kernel_long_ad *last_ext, | |
610 | uint32_t final_block_len) | |
611 | { | |
612 | struct super_block *sb = inode->i_sb; | |
613 | uint32_t added_bytes; | |
614 | ||
615 | added_bytes = final_block_len - | |
616 | (last_ext->extLength & (sb->s_blocksize - 1)); | |
617 | last_ext->extLength += added_bytes; | |
618 | UDF_I(inode)->i_lenExtents += added_bytes; | |
619 | ||
620 | udf_write_aext(inode, last_pos, &last_ext->extLocation, | |
621 | last_ext->extLength, 1); | |
622 | } | |
623 | ||
7e49b6f2 JK |
624 | static int udf_extend_file(struct inode *inode, loff_t newsize) |
625 | { | |
626 | ||
627 | struct extent_position epos; | |
628 | struct kernel_lb_addr eloc; | |
629 | uint32_t elen; | |
630 | int8_t etype; | |
631 | struct super_block *sb = inode->i_sb; | |
632 | sector_t first_block = newsize >> sb->s_blocksize_bits, offset; | |
fa33cdbf | 633 | unsigned long partial_final_block; |
7e49b6f2 JK |
634 | int adsize; |
635 | struct udf_inode_info *iinfo = UDF_I(inode); | |
636 | struct kernel_long_ad extent; | |
fa33cdbf SM |
637 | int err = 0; |
638 | int within_final_block; | |
7e49b6f2 JK |
639 | |
640 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) | |
641 | adsize = sizeof(struct short_ad); | |
642 | else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) | |
643 | adsize = sizeof(struct long_ad); | |
644 | else | |
645 | BUG(); | |
646 | ||
647 | etype = inode_bmap(inode, first_block, &epos, &eloc, &elen, &offset); | |
fa33cdbf | 648 | within_final_block = (etype != -1); |
7e49b6f2 | 649 | |
7e49b6f2 JK |
650 | if ((!epos.bh && epos.offset == udf_file_entry_alloc_offset(inode)) || |
651 | (epos.bh && epos.offset == sizeof(struct allocExtDesc))) { | |
652 | /* File has no extents at all or has empty last | |
653 | * indirect extent! Create a fake extent... */ | |
654 | extent.extLocation.logicalBlockNum = 0; | |
655 | extent.extLocation.partitionReferenceNum = 0; | |
656 | extent.extLength = EXT_NOT_RECORDED_NOT_ALLOCATED; | |
657 | } else { | |
658 | epos.offset -= adsize; | |
659 | etype = udf_next_aext(inode, &epos, &extent.extLocation, | |
660 | &extent.extLength, 0); | |
661 | extent.extLength |= etype << 30; | |
662 | } | |
fa33cdbf SM |
663 | |
664 | partial_final_block = newsize & (sb->s_blocksize - 1); | |
665 | ||
666 | /* File has extent covering the new size (could happen when extending | |
667 | * inside a block)? | |
668 | */ | |
669 | if (within_final_block) { | |
670 | /* Extending file within the last file block */ | |
671 | udf_do_extend_final_block(inode, &epos, &extent, | |
672 | partial_final_block); | |
673 | } else { | |
674 | loff_t add = ((loff_t)offset << sb->s_blocksize_bits) | | |
675 | partial_final_block; | |
676 | err = udf_do_extend_file(inode, &epos, &extent, add); | |
677 | } | |
678 | ||
7e49b6f2 JK |
679 | if (err < 0) |
680 | goto out; | |
681 | err = 0; | |
682 | iinfo->i_lenExtents = newsize; | |
683 | out: | |
684 | brelse(epos.bh); | |
685 | return err; | |
686 | } | |
687 | ||
7b0b0933 JK |
688 | static sector_t inode_getblk(struct inode *inode, sector_t block, |
689 | int *err, int *new) | |
1da177e4 | 690 | { |
5ca4e4be | 691 | struct kernel_long_ad laarr[EXTENT_MERGE_SIZE]; |
ff116fc8 | 692 | struct extent_position prev_epos, cur_epos, next_epos; |
1da177e4 | 693 | int count = 0, startnum = 0, endnum = 0; |
85d71244 | 694 | uint32_t elen = 0, tmpelen; |
5ca4e4be | 695 | struct kernel_lb_addr eloc, tmpeloc; |
1da177e4 | 696 | int c = 1; |
60448b1d | 697 | loff_t lbcount = 0, b_off = 0; |
b490bdd6 | 698 | udf_pblk_t newblocknum, newblock; |
60448b1d | 699 | sector_t offset = 0; |
1da177e4 | 700 | int8_t etype; |
48d6d8ff | 701 | struct udf_inode_info *iinfo = UDF_I(inode); |
b490bdd6 | 702 | udf_pblk_t goal = 0, pgoal = iinfo->i_location.logicalBlockNum; |
31170b6a | 703 | int lastblock = 0; |
fb719c59 | 704 | bool isBeyondEOF; |
1da177e4 | 705 | |
7b0b0933 JK |
706 | *err = 0; |
707 | *new = 0; | |
ff116fc8 | 708 | prev_epos.offset = udf_file_entry_alloc_offset(inode); |
48d6d8ff | 709 | prev_epos.block = iinfo->i_location; |
ff116fc8 JK |
710 | prev_epos.bh = NULL; |
711 | cur_epos = next_epos = prev_epos; | |
28de7948 | 712 | b_off = (loff_t)block << inode->i_sb->s_blocksize_bits; |
1da177e4 LT |
713 | |
714 | /* find the extent which contains the block we are looking for. | |
cb00ea35 CG |
715 | alternate between laarr[0] and laarr[1] for locations of the |
716 | current extent, and the previous extent */ | |
717 | do { | |
718 | if (prev_epos.bh != cur_epos.bh) { | |
3bf25cb4 JK |
719 | brelse(prev_epos.bh); |
720 | get_bh(cur_epos.bh); | |
ff116fc8 | 721 | prev_epos.bh = cur_epos.bh; |
1da177e4 | 722 | } |
cb00ea35 | 723 | if (cur_epos.bh != next_epos.bh) { |
3bf25cb4 JK |
724 | brelse(cur_epos.bh); |
725 | get_bh(next_epos.bh); | |
ff116fc8 | 726 | cur_epos.bh = next_epos.bh; |
1da177e4 LT |
727 | } |
728 | ||
729 | lbcount += elen; | |
730 | ||
ff116fc8 JK |
731 | prev_epos.block = cur_epos.block; |
732 | cur_epos.block = next_epos.block; | |
1da177e4 | 733 | |
ff116fc8 JK |
734 | prev_epos.offset = cur_epos.offset; |
735 | cur_epos.offset = next_epos.offset; | |
1da177e4 | 736 | |
4b11111a MS |
737 | etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 1); |
738 | if (etype == -1) | |
1da177e4 LT |
739 | break; |
740 | ||
741 | c = !c; | |
742 | ||
743 | laarr[c].extLength = (etype << 30) | elen; | |
744 | laarr[c].extLocation = eloc; | |
745 | ||
746 | if (etype != (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) | |
747 | pgoal = eloc.logicalBlockNum + | |
28de7948 CG |
748 | ((elen + inode->i_sb->s_blocksize - 1) >> |
749 | inode->i_sb->s_blocksize_bits); | |
1da177e4 | 750 | |
cb00ea35 | 751 | count++; |
1da177e4 LT |
752 | } while (lbcount + elen <= b_off); |
753 | ||
754 | b_off -= lbcount; | |
755 | offset = b_off >> inode->i_sb->s_blocksize_bits; | |
85d71244 JK |
756 | /* |
757 | * Move prev_epos and cur_epos into indirect extent if we are at | |
758 | * the pointer to it | |
759 | */ | |
760 | udf_next_aext(inode, &prev_epos, &tmpeloc, &tmpelen, 0); | |
761 | udf_next_aext(inode, &cur_epos, &tmpeloc, &tmpelen, 0); | |
1da177e4 LT |
762 | |
763 | /* if the extent is allocated and recorded, return the block | |
cb00ea35 | 764 | if the extent is not a multiple of the blocksize, round up */ |
1da177e4 | 765 | |
cb00ea35 CG |
766 | if (etype == (EXT_RECORDED_ALLOCATED >> 30)) { |
767 | if (elen & (inode->i_sb->s_blocksize - 1)) { | |
1da177e4 | 768 | elen = EXT_RECORDED_ALLOCATED | |
28de7948 CG |
769 | ((elen + inode->i_sb->s_blocksize - 1) & |
770 | ~(inode->i_sb->s_blocksize - 1)); | |
7e49b6f2 | 771 | udf_write_aext(inode, &cur_epos, &eloc, elen, 1); |
1da177e4 | 772 | } |
97e961fd | 773 | newblock = udf_get_lb_pblock(inode->i_sb, &eloc, offset); |
02d4ca49 | 774 | goto out_free; |
1da177e4 LT |
775 | } |
776 | ||
31170b6a | 777 | /* Are we beyond EOF? */ |
cb00ea35 | 778 | if (etype == -1) { |
31170b6a | 779 | int ret; |
fa33cdbf | 780 | loff_t hole_len; |
6981498d | 781 | isBeyondEOF = true; |
31170b6a JK |
782 | if (count) { |
783 | if (c) | |
784 | laarr[0] = laarr[1]; | |
785 | startnum = 1; | |
cb00ea35 | 786 | } else { |
31170b6a | 787 | /* Create a fake extent when there's not one */ |
4b11111a | 788 | memset(&laarr[0].extLocation, 0x00, |
5ca4e4be | 789 | sizeof(struct kernel_lb_addr)); |
31170b6a | 790 | laarr[0].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED; |
7e49b6f2 | 791 | /* Will udf_do_extend_file() create real extent from |
4b11111a | 792 | a fake one? */ |
31170b6a JK |
793 | startnum = (offset > 0); |
794 | } | |
795 | /* Create extents for the hole between EOF and offset */ | |
fa33cdbf SM |
796 | hole_len = (loff_t)offset << inode->i_blkbits; |
797 | ret = udf_do_extend_file(inode, &prev_epos, laarr, hole_len); | |
7e49b6f2 | 798 | if (ret < 0) { |
7e49b6f2 | 799 | *err = ret; |
02d4ca49 FF |
800 | newblock = 0; |
801 | goto out_free; | |
31170b6a JK |
802 | } |
803 | c = 0; | |
804 | offset = 0; | |
805 | count += ret; | |
806 | /* We are not covered by a preallocated extent? */ | |
4b11111a MS |
807 | if ((laarr[0].extLength & UDF_EXTENT_FLAG_MASK) != |
808 | EXT_NOT_RECORDED_ALLOCATED) { | |
31170b6a JK |
809 | /* Is there any real extent? - otherwise we overwrite |
810 | * the fake one... */ | |
811 | if (count) | |
812 | c = !c; | |
813 | laarr[c].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | | |
28de7948 | 814 | inode->i_sb->s_blocksize; |
4b11111a | 815 | memset(&laarr[c].extLocation, 0x00, |
5ca4e4be | 816 | sizeof(struct kernel_lb_addr)); |
cb00ea35 | 817 | count++; |
31170b6a | 818 | } |
cb00ea35 | 819 | endnum = c + 1; |
1da177e4 | 820 | lastblock = 1; |
cb00ea35 | 821 | } else { |
6981498d | 822 | isBeyondEOF = false; |
1da177e4 LT |
823 | endnum = startnum = ((count > 2) ? 2 : count); |
824 | ||
4b11111a MS |
825 | /* if the current extent is in position 0, |
826 | swap it with the previous */ | |
cb00ea35 | 827 | if (!c && count != 1) { |
31170b6a JK |
828 | laarr[2] = laarr[0]; |
829 | laarr[0] = laarr[1]; | |
830 | laarr[1] = laarr[2]; | |
831 | c = 1; | |
832 | } | |
1da177e4 | 833 | |
4b11111a MS |
834 | /* if the current block is located in an extent, |
835 | read the next extent */ | |
836 | etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 0); | |
837 | if (etype != -1) { | |
cb00ea35 CG |
838 | laarr[c + 1].extLength = (etype << 30) | elen; |
839 | laarr[c + 1].extLocation = eloc; | |
840 | count++; | |
841 | startnum++; | |
842 | endnum++; | |
4b11111a | 843 | } else |
1da177e4 LT |
844 | lastblock = 1; |
845 | } | |
1da177e4 LT |
846 | |
847 | /* if the current extent is not recorded but allocated, get the | |
28de7948 | 848 | * block in the extent corresponding to the requested block */ |
4b11111a | 849 | if ((laarr[c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30)) |
1da177e4 | 850 | newblocknum = laarr[c].extLocation.logicalBlockNum + offset; |
4b11111a | 851 | else { /* otherwise, allocate a new block */ |
48d6d8ff MS |
852 | if (iinfo->i_next_alloc_block == block) |
853 | goal = iinfo->i_next_alloc_goal; | |
1da177e4 | 854 | |
cb00ea35 | 855 | if (!goal) { |
4b11111a | 856 | if (!(goal = pgoal)) /* XXX: what was intended here? */ |
48d6d8ff | 857 | goal = iinfo->i_location.logicalBlockNum + 1; |
1da177e4 LT |
858 | } |
859 | ||
4b11111a | 860 | newblocknum = udf_new_block(inode->i_sb, inode, |
48d6d8ff | 861 | iinfo->i_location.partitionReferenceNum, |
4b11111a MS |
862 | goal, err); |
863 | if (!newblocknum) { | |
1da177e4 | 864 | *err = -ENOSPC; |
02d4ca49 FF |
865 | newblock = 0; |
866 | goto out_free; | |
1da177e4 | 867 | } |
fb719c59 NJ |
868 | if (isBeyondEOF) |
869 | iinfo->i_lenExtents += inode->i_sb->s_blocksize; | |
1da177e4 LT |
870 | } |
871 | ||
4b11111a MS |
872 | /* if the extent the requsted block is located in contains multiple |
873 | * blocks, split the extent into at most three extents. blocks prior | |
874 | * to requested block, requested block, and blocks after requested | |
875 | * block */ | |
1da177e4 LT |
876 | udf_split_extents(inode, &c, offset, newblocknum, laarr, &endnum); |
877 | ||
81056dd0 JK |
878 | /* We preallocate blocks only for regular files. It also makes sense |
879 | * for directories but there's a problem when to drop the | |
880 | * preallocation. We might use some delayed work for that but I feel | |
881 | * it's overengineering for a filesystem like UDF. */ | |
882 | if (S_ISREG(inode->i_mode)) | |
883 | udf_prealloc_extents(inode, c, lastblock, laarr, &endnum); | |
1da177e4 LT |
884 | |
885 | /* merge any continuous blocks in laarr */ | |
886 | udf_merge_extents(inode, laarr, &endnum); | |
887 | ||
888 | /* write back the new extents, inserting new extents if the new number | |
28de7948 CG |
889 | * of extents is greater than the old number, and deleting extents if |
890 | * the new number of extents is less than the old number */ | |
ff116fc8 | 891 | udf_update_extents(inode, laarr, startnum, endnum, &prev_epos); |
1da177e4 | 892 | |
4b11111a | 893 | newblock = udf_get_pblock(inode->i_sb, newblocknum, |
48d6d8ff | 894 | iinfo->i_location.partitionReferenceNum, 0); |
7b0b0933 JK |
895 | if (!newblock) { |
896 | *err = -EIO; | |
02d4ca49 | 897 | goto out_free; |
7b0b0933 | 898 | } |
1da177e4 | 899 | *new = 1; |
48d6d8ff MS |
900 | iinfo->i_next_alloc_block = block; |
901 | iinfo->i_next_alloc_goal = newblocknum; | |
c2050a45 | 902 | inode->i_ctime = current_time(inode); |
1da177e4 LT |
903 | |
904 | if (IS_SYNC(inode)) | |
905 | udf_sync_inode(inode); | |
906 | else | |
907 | mark_inode_dirty(inode); | |
02d4ca49 FF |
908 | out_free: |
909 | brelse(prev_epos.bh); | |
910 | brelse(cur_epos.bh); | |
911 | brelse(next_epos.bh); | |
7b0b0933 | 912 | return newblock; |
1da177e4 LT |
913 | } |
914 | ||
cb00ea35 | 915 | static void udf_split_extents(struct inode *inode, int *c, int offset, |
b490bdd6 SM |
916 | udf_pblk_t newblocknum, |
917 | struct kernel_long_ad *laarr, int *endnum) | |
1da177e4 | 918 | { |
4b11111a MS |
919 | unsigned long blocksize = inode->i_sb->s_blocksize; |
920 | unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; | |
921 | ||
1da177e4 | 922 | if ((laarr[*c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30) || |
4b11111a MS |
923 | (laarr[*c].extLength >> 30) == |
924 | (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) { | |
1da177e4 LT |
925 | int curr = *c; |
926 | int blen = ((laarr[curr].extLength & UDF_EXTENT_LENGTH_MASK) + | |
4b11111a | 927 | blocksize - 1) >> blocksize_bits; |
1da177e4 LT |
928 | int8_t etype = (laarr[curr].extLength >> 30); |
929 | ||
4b11111a | 930 | if (blen == 1) |
28de7948 | 931 | ; |
4b11111a | 932 | else if (!offset || blen == offset + 1) { |
cb00ea35 CG |
933 | laarr[curr + 2] = laarr[curr + 1]; |
934 | laarr[curr + 1] = laarr[curr]; | |
935 | } else { | |
936 | laarr[curr + 3] = laarr[curr + 1]; | |
937 | laarr[curr + 2] = laarr[curr + 1] = laarr[curr]; | |
938 | } | |
939 | ||
940 | if (offset) { | |
941 | if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30)) { | |
4b11111a | 942 | udf_free_blocks(inode->i_sb, inode, |
97e961fd | 943 | &laarr[curr].extLocation, |
4b11111a MS |
944 | 0, offset); |
945 | laarr[curr].extLength = | |
946 | EXT_NOT_RECORDED_NOT_ALLOCATED | | |
947 | (offset << blocksize_bits); | |
1da177e4 | 948 | laarr[curr].extLocation.logicalBlockNum = 0; |
4b11111a MS |
949 | laarr[curr].extLocation. |
950 | partitionReferenceNum = 0; | |
951 | } else | |
1da177e4 | 952 | laarr[curr].extLength = (etype << 30) | |
4b11111a | 953 | (offset << blocksize_bits); |
cb00ea35 CG |
954 | curr++; |
955 | (*c)++; | |
956 | (*endnum)++; | |
1da177e4 | 957 | } |
647bd61a | 958 | |
1da177e4 LT |
959 | laarr[curr].extLocation.logicalBlockNum = newblocknum; |
960 | if (etype == (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) | |
961 | laarr[curr].extLocation.partitionReferenceNum = | |
c0b34438 | 962 | UDF_I(inode)->i_location.partitionReferenceNum; |
1da177e4 | 963 | laarr[curr].extLength = EXT_RECORDED_ALLOCATED | |
4b11111a | 964 | blocksize; |
cb00ea35 | 965 | curr++; |
1da177e4 | 966 | |
cb00ea35 | 967 | if (blen != offset + 1) { |
1da177e4 | 968 | if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30)) |
4b11111a MS |
969 | laarr[curr].extLocation.logicalBlockNum += |
970 | offset + 1; | |
28de7948 | 971 | laarr[curr].extLength = (etype << 30) | |
4b11111a | 972 | ((blen - (offset + 1)) << blocksize_bits); |
cb00ea35 CG |
973 | curr++; |
974 | (*endnum)++; | |
1da177e4 LT |
975 | } |
976 | } | |
977 | } | |
978 | ||
979 | static void udf_prealloc_extents(struct inode *inode, int c, int lastblock, | |
3cc6f844 | 980 | struct kernel_long_ad *laarr, |
cb00ea35 | 981 | int *endnum) |
1da177e4 LT |
982 | { |
983 | int start, length = 0, currlength = 0, i; | |
984 | ||
cb00ea35 | 985 | if (*endnum >= (c + 1)) { |
1da177e4 LT |
986 | if (!lastblock) |
987 | return; | |
988 | else | |
989 | start = c; | |
cb00ea35 | 990 | } else { |
4b11111a MS |
991 | if ((laarr[c + 1].extLength >> 30) == |
992 | (EXT_NOT_RECORDED_ALLOCATED >> 30)) { | |
cb00ea35 | 993 | start = c + 1; |
4b11111a MS |
994 | length = currlength = |
995 | (((laarr[c + 1].extLength & | |
996 | UDF_EXTENT_LENGTH_MASK) + | |
997 | inode->i_sb->s_blocksize - 1) >> | |
998 | inode->i_sb->s_blocksize_bits); | |
999 | } else | |
1da177e4 LT |
1000 | start = c; |
1001 | } | |
1002 | ||
cb00ea35 CG |
1003 | for (i = start + 1; i <= *endnum; i++) { |
1004 | if (i == *endnum) { | |
1da177e4 LT |
1005 | if (lastblock) |
1006 | length += UDF_DEFAULT_PREALLOC_BLOCKS; | |
4b11111a MS |
1007 | } else if ((laarr[i].extLength >> 30) == |
1008 | (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) { | |
1009 | length += (((laarr[i].extLength & | |
1010 | UDF_EXTENT_LENGTH_MASK) + | |
1011 | inode->i_sb->s_blocksize - 1) >> | |
1012 | inode->i_sb->s_blocksize_bits); | |
1013 | } else | |
1da177e4 LT |
1014 | break; |
1015 | } | |
1016 | ||
cb00ea35 | 1017 | if (length) { |
1da177e4 | 1018 | int next = laarr[start].extLocation.logicalBlockNum + |
28de7948 | 1019 | (((laarr[start].extLength & UDF_EXTENT_LENGTH_MASK) + |
4b11111a MS |
1020 | inode->i_sb->s_blocksize - 1) >> |
1021 | inode->i_sb->s_blocksize_bits); | |
1da177e4 | 1022 | int numalloc = udf_prealloc_blocks(inode->i_sb, inode, |
4b11111a MS |
1023 | laarr[start].extLocation.partitionReferenceNum, |
1024 | next, (UDF_DEFAULT_PREALLOC_BLOCKS > length ? | |
1025 | length : UDF_DEFAULT_PREALLOC_BLOCKS) - | |
1026 | currlength); | |
28de7948 | 1027 | if (numalloc) { |
4b11111a | 1028 | if (start == (c + 1)) |
1da177e4 | 1029 | laarr[start].extLength += |
4b11111a MS |
1030 | (numalloc << |
1031 | inode->i_sb->s_blocksize_bits); | |
1032 | else { | |
cb00ea35 | 1033 | memmove(&laarr[c + 2], &laarr[c + 1], |
5ca4e4be | 1034 | sizeof(struct long_ad) * (*endnum - (c + 1))); |
cb00ea35 CG |
1035 | (*endnum)++; |
1036 | laarr[c + 1].extLocation.logicalBlockNum = next; | |
1037 | laarr[c + 1].extLocation.partitionReferenceNum = | |
4b11111a MS |
1038 | laarr[c].extLocation. |
1039 | partitionReferenceNum; | |
1040 | laarr[c + 1].extLength = | |
1041 | EXT_NOT_RECORDED_ALLOCATED | | |
1042 | (numalloc << | |
1043 | inode->i_sb->s_blocksize_bits); | |
cb00ea35 | 1044 | start = c + 1; |
1da177e4 LT |
1045 | } |
1046 | ||
cb00ea35 | 1047 | for (i = start + 1; numalloc && i < *endnum; i++) { |
4b11111a MS |
1048 | int elen = ((laarr[i].extLength & |
1049 | UDF_EXTENT_LENGTH_MASK) + | |
1050 | inode->i_sb->s_blocksize - 1) >> | |
1051 | inode->i_sb->s_blocksize_bits; | |
1da177e4 | 1052 | |
cb00ea35 | 1053 | if (elen > numalloc) { |
1da177e4 | 1054 | laarr[i].extLength -= |
4b11111a MS |
1055 | (numalloc << |
1056 | inode->i_sb->s_blocksize_bits); | |
1da177e4 | 1057 | numalloc = 0; |
cb00ea35 | 1058 | } else { |
1da177e4 | 1059 | numalloc -= elen; |
cb00ea35 | 1060 | if (*endnum > (i + 1)) |
4b11111a MS |
1061 | memmove(&laarr[i], |
1062 | &laarr[i + 1], | |
5ca4e4be | 1063 | sizeof(struct long_ad) * |
4b11111a | 1064 | (*endnum - (i + 1))); |
cb00ea35 CG |
1065 | i--; |
1066 | (*endnum)--; | |
1da177e4 LT |
1067 | } |
1068 | } | |
c0b34438 | 1069 | UDF_I(inode)->i_lenExtents += |
4b11111a | 1070 | numalloc << inode->i_sb->s_blocksize_bits; |
1da177e4 LT |
1071 | } |
1072 | } | |
1073 | } | |
1074 | ||
3cc6f844 | 1075 | static void udf_merge_extents(struct inode *inode, struct kernel_long_ad *laarr, |
cb00ea35 | 1076 | int *endnum) |
1da177e4 LT |
1077 | { |
1078 | int i; | |
4b11111a MS |
1079 | unsigned long blocksize = inode->i_sb->s_blocksize; |
1080 | unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; | |
1da177e4 | 1081 | |
cb00ea35 | 1082 | for (i = 0; i < (*endnum - 1); i++) { |
5ca4e4be PE |
1083 | struct kernel_long_ad *li /*l[i]*/ = &laarr[i]; |
1084 | struct kernel_long_ad *lip1 /*l[i plus 1]*/ = &laarr[i + 1]; | |
4b11111a MS |
1085 | |
1086 | if (((li->extLength >> 30) == (lip1->extLength >> 30)) && | |
1087 | (((li->extLength >> 30) == | |
1088 | (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) || | |
1089 | ((lip1->extLocation.logicalBlockNum - | |
1090 | li->extLocation.logicalBlockNum) == | |
1091 | (((li->extLength & UDF_EXTENT_LENGTH_MASK) + | |
1092 | blocksize - 1) >> blocksize_bits)))) { | |
1093 | ||
1094 | if (((li->extLength & UDF_EXTENT_LENGTH_MASK) + | |
1095 | (lip1->extLength & UDF_EXTENT_LENGTH_MASK) + | |
1096 | blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) { | |
1097 | lip1->extLength = (lip1->extLength - | |
1098 | (li->extLength & | |
1099 | UDF_EXTENT_LENGTH_MASK) + | |
1100 | UDF_EXTENT_LENGTH_MASK) & | |
1101 | ~(blocksize - 1); | |
1102 | li->extLength = (li->extLength & | |
1103 | UDF_EXTENT_FLAG_MASK) + | |
1104 | (UDF_EXTENT_LENGTH_MASK + 1) - | |
1105 | blocksize; | |
1106 | lip1->extLocation.logicalBlockNum = | |
1107 | li->extLocation.logicalBlockNum + | |
1108 | ((li->extLength & | |
1109 | UDF_EXTENT_LENGTH_MASK) >> | |
1110 | blocksize_bits); | |
1111 | } else { | |
1112 | li->extLength = lip1->extLength + | |
1113 | (((li->extLength & | |
1114 | UDF_EXTENT_LENGTH_MASK) + | |
1115 | blocksize - 1) & ~(blocksize - 1)); | |
1116 | if (*endnum > (i + 2)) | |
1117 | memmove(&laarr[i + 1], &laarr[i + 2], | |
5ca4e4be | 1118 | sizeof(struct long_ad) * |
4b11111a MS |
1119 | (*endnum - (i + 2))); |
1120 | i--; | |
1121 | (*endnum)--; | |
1da177e4 | 1122 | } |
4b11111a MS |
1123 | } else if (((li->extLength >> 30) == |
1124 | (EXT_NOT_RECORDED_ALLOCATED >> 30)) && | |
1125 | ((lip1->extLength >> 30) == | |
1126 | (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))) { | |
97e961fd | 1127 | udf_free_blocks(inode->i_sb, inode, &li->extLocation, 0, |
4b11111a MS |
1128 | ((li->extLength & |
1129 | UDF_EXTENT_LENGTH_MASK) + | |
1130 | blocksize - 1) >> blocksize_bits); | |
1131 | li->extLocation.logicalBlockNum = 0; | |
1132 | li->extLocation.partitionReferenceNum = 0; | |
1133 | ||
1134 | if (((li->extLength & UDF_EXTENT_LENGTH_MASK) + | |
1135 | (lip1->extLength & UDF_EXTENT_LENGTH_MASK) + | |
1136 | blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) { | |
1137 | lip1->extLength = (lip1->extLength - | |
1138 | (li->extLength & | |
1139 | UDF_EXTENT_LENGTH_MASK) + | |
1140 | UDF_EXTENT_LENGTH_MASK) & | |
1141 | ~(blocksize - 1); | |
1142 | li->extLength = (li->extLength & | |
1143 | UDF_EXTENT_FLAG_MASK) + | |
1144 | (UDF_EXTENT_LENGTH_MASK + 1) - | |
1145 | blocksize; | |
cb00ea35 | 1146 | } else { |
4b11111a MS |
1147 | li->extLength = lip1->extLength + |
1148 | (((li->extLength & | |
1149 | UDF_EXTENT_LENGTH_MASK) + | |
1150 | blocksize - 1) & ~(blocksize - 1)); | |
cb00ea35 CG |
1151 | if (*endnum > (i + 2)) |
1152 | memmove(&laarr[i + 1], &laarr[i + 2], | |
5ca4e4be | 1153 | sizeof(struct long_ad) * |
4b11111a | 1154 | (*endnum - (i + 2))); |
cb00ea35 CG |
1155 | i--; |
1156 | (*endnum)--; | |
1da177e4 | 1157 | } |
4b11111a MS |
1158 | } else if ((li->extLength >> 30) == |
1159 | (EXT_NOT_RECORDED_ALLOCATED >> 30)) { | |
1160 | udf_free_blocks(inode->i_sb, inode, | |
97e961fd | 1161 | &li->extLocation, 0, |
4b11111a MS |
1162 | ((li->extLength & |
1163 | UDF_EXTENT_LENGTH_MASK) + | |
1164 | blocksize - 1) >> blocksize_bits); | |
1165 | li->extLocation.logicalBlockNum = 0; | |
1166 | li->extLocation.partitionReferenceNum = 0; | |
1167 | li->extLength = (li->extLength & | |
1168 | UDF_EXTENT_LENGTH_MASK) | | |
1169 | EXT_NOT_RECORDED_NOT_ALLOCATED; | |
1da177e4 LT |
1170 | } |
1171 | } | |
1172 | } | |
1173 | ||
3cc6f844 | 1174 | static void udf_update_extents(struct inode *inode, struct kernel_long_ad *laarr, |
cb00ea35 CG |
1175 | int startnum, int endnum, |
1176 | struct extent_position *epos) | |
1da177e4 LT |
1177 | { |
1178 | int start = 0, i; | |
5ca4e4be | 1179 | struct kernel_lb_addr tmploc; |
1da177e4 LT |
1180 | uint32_t tmplen; |
1181 | ||
cb00ea35 CG |
1182 | if (startnum > endnum) { |
1183 | for (i = 0; i < (startnum - endnum); i++) | |
6c1e4d06 | 1184 | udf_delete_aext(inode, *epos); |
cb00ea35 CG |
1185 | } else if (startnum < endnum) { |
1186 | for (i = 0; i < (endnum - startnum); i++) { | |
ff116fc8 | 1187 | udf_insert_aext(inode, *epos, laarr[i].extLocation, |
cb00ea35 | 1188 | laarr[i].extLength); |
ff116fc8 | 1189 | udf_next_aext(inode, epos, &laarr[i].extLocation, |
cb00ea35 CG |
1190 | &laarr[i].extLength, 1); |
1191 | start++; | |
1da177e4 LT |
1192 | } |
1193 | } | |
1194 | ||
cb00ea35 | 1195 | for (i = start; i < endnum; i++) { |
ff116fc8 | 1196 | udf_next_aext(inode, epos, &tmploc, &tmplen, 0); |
97e961fd | 1197 | udf_write_aext(inode, epos, &laarr[i].extLocation, |
cb00ea35 | 1198 | laarr[i].extLength, 1); |
1da177e4 LT |
1199 | } |
1200 | } | |
1201 | ||
b490bdd6 | 1202 | struct buffer_head *udf_bread(struct inode *inode, udf_pblk_t block, |
cb00ea35 | 1203 | int create, int *err) |
1da177e4 | 1204 | { |
cb00ea35 | 1205 | struct buffer_head *bh = NULL; |
1da177e4 LT |
1206 | |
1207 | bh = udf_getblk(inode, block, create, err); | |
1208 | if (!bh) | |
1209 | return NULL; | |
1210 | ||
1211 | if (buffer_uptodate(bh)) | |
1212 | return bh; | |
28de7948 | 1213 | |
dfec8a14 | 1214 | ll_rw_block(REQ_OP_READ, 0, 1, &bh); |
28de7948 | 1215 | |
1da177e4 LT |
1216 | wait_on_buffer(bh); |
1217 | if (buffer_uptodate(bh)) | |
1218 | return bh; | |
28de7948 | 1219 | |
1da177e4 LT |
1220 | brelse(bh); |
1221 | *err = -EIO; | |
1222 | return NULL; | |
1223 | } | |
1224 | ||
7e49b6f2 | 1225 | int udf_setsize(struct inode *inode, loff_t newsize) |
1da177e4 | 1226 | { |
1da177e4 | 1227 | int err; |
48d6d8ff | 1228 | struct udf_inode_info *iinfo; |
89a4d970 | 1229 | unsigned int bsize = i_blocksize(inode); |
1da177e4 LT |
1230 | |
1231 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || | |
cb00ea35 | 1232 | S_ISLNK(inode->i_mode))) |
7e49b6f2 | 1233 | return -EINVAL; |
1da177e4 | 1234 | if (IS_APPEND(inode) || IS_IMMUTABLE(inode)) |
7e49b6f2 | 1235 | return -EPERM; |
1da177e4 | 1236 | |
48d6d8ff | 1237 | iinfo = UDF_I(inode); |
7e49b6f2 | 1238 | if (newsize > inode->i_size) { |
4d0fb621 | 1239 | down_write(&iinfo->i_data_sem); |
7e49b6f2 JK |
1240 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { |
1241 | if (bsize < | |
1242 | (udf_file_entry_alloc_offset(inode) + newsize)) { | |
1243 | err = udf_expand_file_adinicb(inode); | |
d2eb8c35 | 1244 | if (err) |
7e49b6f2 | 1245 | return err; |
d2eb8c35 | 1246 | down_write(&iinfo->i_data_sem); |
bb2b6d19 | 1247 | } else { |
7e49b6f2 | 1248 | iinfo->i_lenAlloc = newsize; |
bb2b6d19 IA |
1249 | goto set_size; |
1250 | } | |
7e49b6f2 JK |
1251 | } |
1252 | err = udf_extend_file(inode, newsize); | |
1253 | if (err) { | |
1254 | up_write(&iinfo->i_data_sem); | |
1255 | return err; | |
1da177e4 | 1256 | } |
bb2b6d19 | 1257 | set_size: |
4d0fb621 | 1258 | up_write(&iinfo->i_data_sem); |
f2e95355 | 1259 | truncate_setsize(inode, newsize); |
cb00ea35 | 1260 | } else { |
7e49b6f2 JK |
1261 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { |
1262 | down_write(&iinfo->i_data_sem); | |
99600051 | 1263 | udf_clear_extent_cache(inode); |
7e49b6f2 JK |
1264 | memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr + newsize, |
1265 | 0x00, bsize - newsize - | |
1266 | udf_file_entry_alloc_offset(inode)); | |
1267 | iinfo->i_lenAlloc = newsize; | |
1268 | truncate_setsize(inode, newsize); | |
1269 | up_write(&iinfo->i_data_sem); | |
1270 | goto update_time; | |
1271 | } | |
1272 | err = block_truncate_page(inode->i_mapping, newsize, | |
1273 | udf_get_block); | |
1274 | if (err) | |
1275 | return err; | |
f2e95355 | 1276 | truncate_setsize(inode, newsize); |
4d0fb621 | 1277 | down_write(&iinfo->i_data_sem); |
99600051 | 1278 | udf_clear_extent_cache(inode); |
2b42be5e | 1279 | err = udf_truncate_extents(inode); |
4d0fb621 | 1280 | up_write(&iinfo->i_data_sem); |
2b42be5e JK |
1281 | if (err) |
1282 | return err; | |
647bd61a | 1283 | } |
7e49b6f2 | 1284 | update_time: |
c2050a45 | 1285 | inode->i_mtime = inode->i_ctime = current_time(inode); |
1da177e4 | 1286 | if (IS_SYNC(inode)) |
cb00ea35 | 1287 | udf_sync_inode(inode); |
1da177e4 LT |
1288 | else |
1289 | mark_inode_dirty(inode); | |
7e49b6f2 | 1290 | return 0; |
1da177e4 LT |
1291 | } |
1292 | ||
c03aa9f6 JK |
1293 | /* |
1294 | * Maximum length of linked list formed by ICB hierarchy. The chosen number is | |
1295 | * arbitrary - just that we hopefully don't limit any real use of rewritten | |
1296 | * inode on write-once media but avoid looping for too long on corrupted media. | |
1297 | */ | |
1298 | #define UDF_MAX_ICB_NESTING 1024 | |
1299 | ||
6174c2eb | 1300 | static int udf_read_inode(struct inode *inode, bool hidden_inode) |
1da177e4 LT |
1301 | { |
1302 | struct buffer_head *bh = NULL; | |
1303 | struct fileEntry *fe; | |
bb7720a0 | 1304 | struct extendedFileEntry *efe; |
1da177e4 | 1305 | uint16_t ident; |
48d6d8ff | 1306 | struct udf_inode_info *iinfo = UDF_I(inode); |
bb7720a0 | 1307 | struct udf_sb_info *sbi = UDF_SB(inode->i_sb); |
6d3d5e86 | 1308 | struct kernel_lb_addr *iloc = &iinfo->i_location; |
bb7720a0 | 1309 | unsigned int link_count; |
c03aa9f6 | 1310 | unsigned int indirections = 0; |
79144954 | 1311 | int bs = inode->i_sb->s_blocksize; |
6d3d5e86 | 1312 | int ret = -EIO; |
0c9850f4 | 1313 | uint32_t uid, gid; |
1da177e4 | 1314 | |
c03aa9f6 | 1315 | reread: |
1d82a56b | 1316 | if (iloc->partitionReferenceNum >= sbi->s_partitions) { |
fcbf7637 | 1317 | udf_debug("partition reference: %u > logical volume partitions: %u\n", |
1d82a56b FF |
1318 | iloc->partitionReferenceNum, sbi->s_partitions); |
1319 | return -EIO; | |
1320 | } | |
1321 | ||
6d3d5e86 JK |
1322 | if (iloc->logicalBlockNum >= |
1323 | sbi->s_partmaps[iloc->partitionReferenceNum].s_partition_len) { | |
fcbf7637 | 1324 | udf_debug("block=%u, partition=%u out of range\n", |
6d3d5e86 JK |
1325 | iloc->logicalBlockNum, iloc->partitionReferenceNum); |
1326 | return -EIO; | |
1327 | } | |
1328 | ||
1da177e4 LT |
1329 | /* |
1330 | * Set defaults, but the inode is still incomplete! | |
1331 | * Note: get_new_inode() sets the following on a new inode: | |
1332 | * i_sb = sb | |
1333 | * i_no = ino | |
1334 | * i_flags = sb->s_flags | |
1335 | * i_state = 0 | |
1336 | * clean_inode(): zero fills and sets | |
1337 | * i_count = 1 | |
1338 | * i_nlink = 1 | |
1339 | * i_op = NULL; | |
1340 | */ | |
6d3d5e86 | 1341 | bh = udf_read_ptagged(inode->i_sb, iloc, 0, &ident); |
cb00ea35 | 1342 | if (!bh) { |
fcbf7637 | 1343 | udf_err(inode->i_sb, "(ino %lu) failed !bh\n", inode->i_ino); |
6d3d5e86 | 1344 | return -EIO; |
1da177e4 LT |
1345 | } |
1346 | ||
1347 | if (ident != TAG_IDENT_FE && ident != TAG_IDENT_EFE && | |
cb00ea35 | 1348 | ident != TAG_IDENT_USE) { |
fcbf7637 | 1349 | udf_err(inode->i_sb, "(ino %lu) failed ident=%u\n", |
78ace70c | 1350 | inode->i_ino, ident); |
6d3d5e86 | 1351 | goto out; |
1da177e4 LT |
1352 | } |
1353 | ||
1354 | fe = (struct fileEntry *)bh->b_data; | |
bb7720a0 | 1355 | efe = (struct extendedFileEntry *)bh->b_data; |
1da177e4 | 1356 | |
5e0f0017 | 1357 | if (fe->icbTag.strategyType == cpu_to_le16(4096)) { |
1ab92785 | 1358 | struct buffer_head *ibh; |
1da177e4 | 1359 | |
6d3d5e86 | 1360 | ibh = udf_read_ptagged(inode->i_sb, iloc, 1, &ident); |
1ab92785 | 1361 | if (ident == TAG_IDENT_IE && ibh) { |
5ca4e4be | 1362 | struct kernel_lb_addr loc; |
1ab92785 | 1363 | struct indirectEntry *ie; |
1364 | ||
1365 | ie = (struct indirectEntry *)ibh->b_data; | |
1366 | loc = lelb_to_cpu(ie->indirectICB.extLocation); | |
1367 | ||
c03aa9f6 | 1368 | if (ie->indirectICB.extLength) { |
c03aa9f6 JK |
1369 | brelse(ibh); |
1370 | memcpy(&iinfo->i_location, &loc, | |
1371 | sizeof(struct kernel_lb_addr)); | |
1372 | if (++indirections > UDF_MAX_ICB_NESTING) { | |
1373 | udf_err(inode->i_sb, | |
1374 | "too many ICBs in ICB hierarchy" | |
1375 | " (max %d supported)\n", | |
1376 | UDF_MAX_ICB_NESTING); | |
6d3d5e86 | 1377 | goto out; |
28de7948 | 1378 | } |
6d3d5e86 | 1379 | brelse(bh); |
c03aa9f6 | 1380 | goto reread; |
1da177e4 | 1381 | } |
28de7948 | 1382 | } |
1ab92785 | 1383 | brelse(ibh); |
5e0f0017 | 1384 | } else if (fe->icbTag.strategyType != cpu_to_le16(4)) { |
fcbf7637 | 1385 | udf_err(inode->i_sb, "unsupported strategy type: %u\n", |
78ace70c | 1386 | le16_to_cpu(fe->icbTag.strategyType)); |
6d3d5e86 | 1387 | goto out; |
1da177e4 | 1388 | } |
5e0f0017 | 1389 | if (fe->icbTag.strategyType == cpu_to_le16(4)) |
48d6d8ff | 1390 | iinfo->i_strat4096 = 0; |
5e0f0017 | 1391 | else /* if (fe->icbTag.strategyType == cpu_to_le16(4096)) */ |
48d6d8ff | 1392 | iinfo->i_strat4096 = 1; |
1da177e4 | 1393 | |
48d6d8ff | 1394 | iinfo->i_alloc_type = le16_to_cpu(fe->icbTag.flags) & |
4b11111a | 1395 | ICBTAG_FLAG_AD_MASK; |
d288d958 JK |
1396 | if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_SHORT && |
1397 | iinfo->i_alloc_type != ICBTAG_FLAG_AD_LONG && | |
1398 | iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { | |
1399 | ret = -EIO; | |
1400 | goto out; | |
1401 | } | |
48d6d8ff MS |
1402 | iinfo->i_unique = 0; |
1403 | iinfo->i_lenEAttr = 0; | |
1404 | iinfo->i_lenExtents = 0; | |
1405 | iinfo->i_lenAlloc = 0; | |
1406 | iinfo->i_next_alloc_block = 0; | |
1407 | iinfo->i_next_alloc_goal = 0; | |
5e0f0017 | 1408 | if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_EFE)) { |
48d6d8ff MS |
1409 | iinfo->i_efe = 1; |
1410 | iinfo->i_use = 0; | |
79144954 | 1411 | ret = udf_alloc_i_data(inode, bs - |
6d3d5e86 JK |
1412 | sizeof(struct extendedFileEntry)); |
1413 | if (ret) | |
1414 | goto out; | |
48d6d8ff | 1415 | memcpy(iinfo->i_ext.i_data, |
4b11111a | 1416 | bh->b_data + sizeof(struct extendedFileEntry), |
79144954 | 1417 | bs - sizeof(struct extendedFileEntry)); |
5e0f0017 | 1418 | } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_FE)) { |
48d6d8ff MS |
1419 | iinfo->i_efe = 0; |
1420 | iinfo->i_use = 0; | |
79144954 | 1421 | ret = udf_alloc_i_data(inode, bs - sizeof(struct fileEntry)); |
6d3d5e86 JK |
1422 | if (ret) |
1423 | goto out; | |
48d6d8ff | 1424 | memcpy(iinfo->i_ext.i_data, |
c0b34438 | 1425 | bh->b_data + sizeof(struct fileEntry), |
79144954 | 1426 | bs - sizeof(struct fileEntry)); |
5e0f0017 | 1427 | } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_USE)) { |
48d6d8ff MS |
1428 | iinfo->i_efe = 0; |
1429 | iinfo->i_use = 1; | |
1430 | iinfo->i_lenAlloc = le32_to_cpu( | |
4b11111a MS |
1431 | ((struct unallocSpaceEntry *)bh->b_data)-> |
1432 | lengthAllocDescs); | |
79144954 | 1433 | ret = udf_alloc_i_data(inode, bs - |
6d3d5e86 JK |
1434 | sizeof(struct unallocSpaceEntry)); |
1435 | if (ret) | |
1436 | goto out; | |
48d6d8ff | 1437 | memcpy(iinfo->i_ext.i_data, |
4b11111a | 1438 | bh->b_data + sizeof(struct unallocSpaceEntry), |
79144954 | 1439 | bs - sizeof(struct unallocSpaceEntry)); |
6d3d5e86 | 1440 | return 0; |
1da177e4 LT |
1441 | } |
1442 | ||
6d3d5e86 | 1443 | ret = -EIO; |
c03cad24 | 1444 | read_lock(&sbi->s_cred_lock); |
0c9850f4 JK |
1445 | uid = le32_to_cpu(fe->uid); |
1446 | if (uid == UDF_INVALID_ID || | |
ca76d2d8 | 1447 | UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_SET)) |
0c9850f4 JK |
1448 | inode->i_uid = sbi->s_uid; |
1449 | else | |
1450 | i_uid_write(inode, uid); | |
1da177e4 | 1451 | |
0c9850f4 JK |
1452 | gid = le32_to_cpu(fe->gid); |
1453 | if (gid == UDF_INVALID_ID || | |
ca76d2d8 | 1454 | UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_SET)) |
0c9850f4 JK |
1455 | inode->i_gid = sbi->s_gid; |
1456 | else | |
1457 | i_gid_write(inode, gid); | |
1da177e4 | 1458 | |
7ac9bcd5 | 1459 | if (fe->icbTag.fileType != ICBTAG_FILE_TYPE_DIRECTORY && |
87bc730c | 1460 | sbi->s_fmode != UDF_INVALID_MODE) |
7ac9bcd5 MS |
1461 | inode->i_mode = sbi->s_fmode; |
1462 | else if (fe->icbTag.fileType == ICBTAG_FILE_TYPE_DIRECTORY && | |
87bc730c | 1463 | sbi->s_dmode != UDF_INVALID_MODE) |
7ac9bcd5 MS |
1464 | inode->i_mode = sbi->s_dmode; |
1465 | else | |
1466 | inode->i_mode = udf_convert_permissions(fe); | |
1467 | inode->i_mode &= ~sbi->s_umask; | |
c3367a1b SM |
1468 | iinfo->i_extraPerms = le32_to_cpu(fe->permissions) & ~FE_MAPPED_PERMS; |
1469 | ||
c03cad24 JK |
1470 | read_unlock(&sbi->s_cred_lock); |
1471 | ||
bfe86848 | 1472 | link_count = le16_to_cpu(fe->fileLinkCount); |
4071b913 | 1473 | if (!link_count) { |
6174c2eb JK |
1474 | if (!hidden_inode) { |
1475 | ret = -ESTALE; | |
1476 | goto out; | |
1477 | } | |
1478 | link_count = 1; | |
4071b913 | 1479 | } |
bfe86848 | 1480 | set_nlink(inode, link_count); |
c03cad24 JK |
1481 | |
1482 | inode->i_size = le64_to_cpu(fe->informationLength); | |
1483 | iinfo->i_lenExtents = inode->i_size; | |
1da177e4 | 1484 | |
48d6d8ff | 1485 | if (iinfo->i_efe == 0) { |
1da177e4 | 1486 | inode->i_blocks = le64_to_cpu(fe->logicalBlocksRecorded) << |
28de7948 | 1487 | (inode->i_sb->s_blocksize_bits - 9); |
1da177e4 | 1488 | |
c3b9cecd AB |
1489 | udf_disk_stamp_to_time(&inode->i_atime, fe->accessTime); |
1490 | udf_disk_stamp_to_time(&inode->i_mtime, fe->modificationTime); | |
1491 | udf_disk_stamp_to_time(&inode->i_ctime, fe->attrTime); | |
1da177e4 | 1492 | |
48d6d8ff MS |
1493 | iinfo->i_unique = le64_to_cpu(fe->uniqueID); |
1494 | iinfo->i_lenEAttr = le32_to_cpu(fe->lengthExtendedAttr); | |
1495 | iinfo->i_lenAlloc = le32_to_cpu(fe->lengthAllocDescs); | |
d5e2cf07 | 1496 | iinfo->i_checkpoint = le32_to_cpu(fe->checkpoint); |
ab9a3a73 SM |
1497 | iinfo->i_streamdir = 0; |
1498 | iinfo->i_lenStreams = 0; | |
cb00ea35 | 1499 | } else { |
647bd61a | 1500 | inode->i_blocks = le64_to_cpu(efe->logicalBlocksRecorded) << |
cb00ea35 | 1501 | (inode->i_sb->s_blocksize_bits - 9); |
1da177e4 | 1502 | |
c3b9cecd AB |
1503 | udf_disk_stamp_to_time(&inode->i_atime, efe->accessTime); |
1504 | udf_disk_stamp_to_time(&inode->i_mtime, efe->modificationTime); | |
0220edda | 1505 | udf_disk_stamp_to_time(&iinfo->i_crtime, efe->createTime); |
c3b9cecd | 1506 | udf_disk_stamp_to_time(&inode->i_ctime, efe->attrTime); |
1da177e4 | 1507 | |
48d6d8ff MS |
1508 | iinfo->i_unique = le64_to_cpu(efe->uniqueID); |
1509 | iinfo->i_lenEAttr = le32_to_cpu(efe->lengthExtendedAttr); | |
1510 | iinfo->i_lenAlloc = le32_to_cpu(efe->lengthAllocDescs); | |
d5e2cf07 | 1511 | iinfo->i_checkpoint = le32_to_cpu(efe->checkpoint); |
ab9a3a73 SM |
1512 | |
1513 | /* Named streams */ | |
1514 | iinfo->i_streamdir = (efe->streamDirectoryICB.extLength != 0); | |
1515 | iinfo->i_locStreamdir = | |
1516 | lelb_to_cpu(efe->streamDirectoryICB.extLocation); | |
1517 | iinfo->i_lenStreams = le64_to_cpu(efe->objectSize); | |
1518 | if (iinfo->i_lenStreams >= inode->i_size) | |
1519 | iinfo->i_lenStreams -= inode->i_size; | |
1520 | else | |
1521 | iinfo->i_lenStreams = 0; | |
1da177e4 | 1522 | } |
470cca56 | 1523 | inode->i_generation = iinfo->i_unique; |
1da177e4 | 1524 | |
23b133bd JK |
1525 | /* |
1526 | * Sanity check length of allocation descriptors and extended attrs to | |
1527 | * avoid integer overflows | |
1528 | */ | |
1529 | if (iinfo->i_lenEAttr > bs || iinfo->i_lenAlloc > bs) | |
1530 | goto out; | |
1531 | /* Now do exact checks */ | |
1532 | if (udf_file_entry_alloc_offset(inode) + iinfo->i_lenAlloc > bs) | |
1533 | goto out; | |
e159332b JK |
1534 | /* Sanity checks for files in ICB so that we don't get confused later */ |
1535 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { | |
1536 | /* | |
1537 | * For file in ICB data is stored in allocation descriptor | |
1538 | * so sizes should match | |
1539 | */ | |
1540 | if (iinfo->i_lenAlloc != inode->i_size) | |
1541 | goto out; | |
1542 | /* File in ICB has to fit in there... */ | |
79144954 | 1543 | if (inode->i_size > bs - udf_file_entry_alloc_offset(inode)) |
e159332b JK |
1544 | goto out; |
1545 | } | |
1546 | ||
cb00ea35 CG |
1547 | switch (fe->icbTag.fileType) { |
1548 | case ICBTAG_FILE_TYPE_DIRECTORY: | |
28de7948 CG |
1549 | inode->i_op = &udf_dir_inode_operations; |
1550 | inode->i_fop = &udf_dir_operations; | |
1551 | inode->i_mode |= S_IFDIR; | |
1552 | inc_nlink(inode); | |
1553 | break; | |
cb00ea35 CG |
1554 | case ICBTAG_FILE_TYPE_REALTIME: |
1555 | case ICBTAG_FILE_TYPE_REGULAR: | |
1556 | case ICBTAG_FILE_TYPE_UNDEF: | |
742e1795 | 1557 | case ICBTAG_FILE_TYPE_VAT20: |
48d6d8ff | 1558 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
28de7948 CG |
1559 | inode->i_data.a_ops = &udf_adinicb_aops; |
1560 | else | |
1561 | inode->i_data.a_ops = &udf_aops; | |
1562 | inode->i_op = &udf_file_inode_operations; | |
1563 | inode->i_fop = &udf_file_operations; | |
1564 | inode->i_mode |= S_IFREG; | |
1565 | break; | |
cb00ea35 | 1566 | case ICBTAG_FILE_TYPE_BLOCK: |
28de7948 CG |
1567 | inode->i_mode |= S_IFBLK; |
1568 | break; | |
cb00ea35 | 1569 | case ICBTAG_FILE_TYPE_CHAR: |
28de7948 CG |
1570 | inode->i_mode |= S_IFCHR; |
1571 | break; | |
cb00ea35 | 1572 | case ICBTAG_FILE_TYPE_FIFO: |
28de7948 CG |
1573 | init_special_inode(inode, inode->i_mode | S_IFIFO, 0); |
1574 | break; | |
cb00ea35 | 1575 | case ICBTAG_FILE_TYPE_SOCKET: |
28de7948 CG |
1576 | init_special_inode(inode, inode->i_mode | S_IFSOCK, 0); |
1577 | break; | |
cb00ea35 | 1578 | case ICBTAG_FILE_TYPE_SYMLINK: |
28de7948 | 1579 | inode->i_data.a_ops = &udf_symlink_aops; |
ad4d0532 | 1580 | inode->i_op = &udf_symlink_inode_operations; |
21fc61c7 | 1581 | inode_nohighmem(inode); |
6ff6b2b3 | 1582 | inode->i_mode = S_IFLNK | 0777; |
28de7948 | 1583 | break; |
bfb257a5 JK |
1584 | case ICBTAG_FILE_TYPE_MAIN: |
1585 | udf_debug("METADATA FILE-----\n"); | |
1586 | break; | |
1587 | case ICBTAG_FILE_TYPE_MIRROR: | |
1588 | udf_debug("METADATA MIRROR FILE-----\n"); | |
1589 | break; | |
1590 | case ICBTAG_FILE_TYPE_BITMAP: | |
1591 | udf_debug("METADATA BITMAP FILE-----\n"); | |
1592 | break; | |
cb00ea35 | 1593 | default: |
fcbf7637 | 1594 | udf_err(inode->i_sb, "(ino %lu) failed unknown file type=%u\n", |
78ace70c | 1595 | inode->i_ino, fe->icbTag.fileType); |
6d3d5e86 | 1596 | goto out; |
1da177e4 | 1597 | } |
cb00ea35 | 1598 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { |
4b11111a MS |
1599 | struct deviceSpec *dsea = |
1600 | (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1); | |
cb00ea35 CG |
1601 | if (dsea) { |
1602 | init_special_inode(inode, inode->i_mode, | |
4b11111a MS |
1603 | MKDEV(le32_to_cpu(dsea->majorDeviceIdent), |
1604 | le32_to_cpu(dsea->minorDeviceIdent))); | |
1da177e4 | 1605 | /* Developer ID ??? */ |
4b11111a | 1606 | } else |
6d3d5e86 | 1607 | goto out; |
1da177e4 | 1608 | } |
6d3d5e86 JK |
1609 | ret = 0; |
1610 | out: | |
bb7720a0 | 1611 | brelse(bh); |
6d3d5e86 | 1612 | return ret; |
1da177e4 LT |
1613 | } |
1614 | ||
647bd61a CG |
1615 | static int udf_alloc_i_data(struct inode *inode, size_t size) |
1616 | { | |
48d6d8ff MS |
1617 | struct udf_inode_info *iinfo = UDF_I(inode); |
1618 | iinfo->i_ext.i_data = kmalloc(size, GFP_KERNEL); | |
b5f52454 | 1619 | if (!iinfo->i_ext.i_data) |
647bd61a | 1620 | return -ENOMEM; |
647bd61a CG |
1621 | return 0; |
1622 | } | |
1623 | ||
faa17292 | 1624 | static umode_t udf_convert_permissions(struct fileEntry *fe) |
1da177e4 | 1625 | { |
faa17292 | 1626 | umode_t mode; |
1da177e4 LT |
1627 | uint32_t permissions; |
1628 | uint32_t flags; | |
1629 | ||
1630 | permissions = le32_to_cpu(fe->permissions); | |
1631 | flags = le16_to_cpu(fe->icbTag.flags); | |
1632 | ||
6ff6b2b3 FF |
1633 | mode = ((permissions) & 0007) | |
1634 | ((permissions >> 2) & 0070) | | |
1635 | ((permissions >> 4) & 0700) | | |
4b11111a MS |
1636 | ((flags & ICBTAG_FLAG_SETUID) ? S_ISUID : 0) | |
1637 | ((flags & ICBTAG_FLAG_SETGID) ? S_ISGID : 0) | | |
1638 | ((flags & ICBTAG_FLAG_STICKY) ? S_ISVTX : 0); | |
1da177e4 LT |
1639 | |
1640 | return mode; | |
1641 | } | |
1642 | ||
c3367a1b SM |
1643 | void udf_update_extra_perms(struct inode *inode, umode_t mode) |
1644 | { | |
1645 | struct udf_inode_info *iinfo = UDF_I(inode); | |
1646 | ||
1647 | /* | |
1648 | * UDF 2.01 sec. 3.3.3.3 Note 2: | |
1649 | * In Unix, delete permission tracks write | |
1650 | */ | |
1651 | iinfo->i_extraPerms &= ~FE_DELETE_PERMS; | |
1652 | if (mode & 0200) | |
1653 | iinfo->i_extraPerms |= FE_PERM_U_DELETE; | |
1654 | if (mode & 0020) | |
1655 | iinfo->i_extraPerms |= FE_PERM_G_DELETE; | |
1656 | if (mode & 0002) | |
1657 | iinfo->i_extraPerms |= FE_PERM_O_DELETE; | |
1658 | } | |
1659 | ||
a9185b41 | 1660 | int udf_write_inode(struct inode *inode, struct writeback_control *wbc) |
1da177e4 | 1661 | { |
49521de1 | 1662 | return udf_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL); |
1da177e4 LT |
1663 | } |
1664 | ||
49521de1 | 1665 | static int udf_sync_inode(struct inode *inode) |
1da177e4 LT |
1666 | { |
1667 | return udf_update_inode(inode, 1); | |
1668 | } | |
1669 | ||
c3b9cecd | 1670 | static void udf_adjust_time(struct udf_inode_info *iinfo, struct timespec64 time) |
7ed0fbd7 FF |
1671 | { |
1672 | if (iinfo->i_crtime.tv_sec > time.tv_sec || | |
1673 | (iinfo->i_crtime.tv_sec == time.tv_sec && | |
1674 | iinfo->i_crtime.tv_nsec > time.tv_nsec)) | |
1675 | iinfo->i_crtime = time; | |
1676 | } | |
1677 | ||
cb00ea35 | 1678 | static int udf_update_inode(struct inode *inode, int do_sync) |
1da177e4 LT |
1679 | { |
1680 | struct buffer_head *bh = NULL; | |
1681 | struct fileEntry *fe; | |
1682 | struct extendedFileEntry *efe; | |
b2527bfa | 1683 | uint64_t lb_recorded; |
1da177e4 LT |
1684 | uint32_t udfperms; |
1685 | uint16_t icbflags; | |
1686 | uint16_t crclen; | |
1da177e4 | 1687 | int err = 0; |
6c79e987 | 1688 | struct udf_sb_info *sbi = UDF_SB(inode->i_sb); |
4b11111a | 1689 | unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; |
48d6d8ff | 1690 | struct udf_inode_info *iinfo = UDF_I(inode); |
1da177e4 | 1691 | |
5833ded9 JK |
1692 | bh = udf_tgetblk(inode->i_sb, |
1693 | udf_get_lb_pblock(inode->i_sb, &iinfo->i_location, 0)); | |
cb00ea35 | 1694 | if (!bh) { |
aae917cd | 1695 | udf_debug("getblk failure\n"); |
0fd2ba36 | 1696 | return -EIO; |
1da177e4 LT |
1697 | } |
1698 | ||
aae917cd JK |
1699 | lock_buffer(bh); |
1700 | memset(bh->b_data, 0, inode->i_sb->s_blocksize); | |
1da177e4 LT |
1701 | fe = (struct fileEntry *)bh->b_data; |
1702 | efe = (struct extendedFileEntry *)bh->b_data; | |
1703 | ||
aae917cd | 1704 | if (iinfo->i_use) { |
1da177e4 | 1705 | struct unallocSpaceEntry *use = |
28de7948 | 1706 | (struct unallocSpaceEntry *)bh->b_data; |
1da177e4 | 1707 | |
48d6d8ff | 1708 | use->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc); |
4b11111a | 1709 | memcpy(bh->b_data + sizeof(struct unallocSpaceEntry), |
48d6d8ff | 1710 | iinfo->i_ext.i_data, inode->i_sb->s_blocksize - |
4b11111a | 1711 | sizeof(struct unallocSpaceEntry)); |
aae917cd | 1712 | use->descTag.tagIdent = cpu_to_le16(TAG_IDENT_USE); |
70f19f58 | 1713 | crclen = sizeof(struct unallocSpaceEntry); |
1da177e4 | 1714 | |
70f19f58 | 1715 | goto finish; |
1da177e4 LT |
1716 | } |
1717 | ||
4d6660eb | 1718 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_FORGET)) |
0c9850f4 | 1719 | fe->uid = cpu_to_le32(UDF_INVALID_ID); |
cb00ea35 | 1720 | else |
c2ba138a | 1721 | fe->uid = cpu_to_le32(i_uid_read(inode)); |
1da177e4 | 1722 | |
4d6660eb | 1723 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_FORGET)) |
0c9850f4 | 1724 | fe->gid = cpu_to_le32(UDF_INVALID_ID); |
cb00ea35 | 1725 | else |
c2ba138a | 1726 | fe->gid = cpu_to_le32(i_gid_read(inode)); |
1da177e4 | 1727 | |
6ff6b2b3 FF |
1728 | udfperms = ((inode->i_mode & 0007)) | |
1729 | ((inode->i_mode & 0070) << 2) | | |
1730 | ((inode->i_mode & 0700) << 4); | |
1da177e4 | 1731 | |
c3367a1b | 1732 | udfperms |= iinfo->i_extraPerms; |
1da177e4 LT |
1733 | fe->permissions = cpu_to_le32(udfperms); |
1734 | ||
8a70ee33 | 1735 | if (S_ISDIR(inode->i_mode) && inode->i_nlink > 0) |
1da177e4 LT |
1736 | fe->fileLinkCount = cpu_to_le16(inode->i_nlink - 1); |
1737 | else | |
1738 | fe->fileLinkCount = cpu_to_le16(inode->i_nlink); | |
1739 | ||
1740 | fe->informationLength = cpu_to_le64(inode->i_size); | |
1741 | ||
cb00ea35 | 1742 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { |
5ca4e4be | 1743 | struct regid *eid; |
28de7948 CG |
1744 | struct deviceSpec *dsea = |
1745 | (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1); | |
cb00ea35 | 1746 | if (!dsea) { |
1da177e4 | 1747 | dsea = (struct deviceSpec *) |
28de7948 CG |
1748 | udf_add_extendedattr(inode, |
1749 | sizeof(struct deviceSpec) + | |
5ca4e4be | 1750 | sizeof(struct regid), 12, 0x3); |
1da177e4 LT |
1751 | dsea->attrType = cpu_to_le32(12); |
1752 | dsea->attrSubtype = 1; | |
4b11111a MS |
1753 | dsea->attrLength = cpu_to_le32( |
1754 | sizeof(struct deviceSpec) + | |
5ca4e4be PE |
1755 | sizeof(struct regid)); |
1756 | dsea->impUseLength = cpu_to_le32(sizeof(struct regid)); | |
1da177e4 | 1757 | } |
5ca4e4be | 1758 | eid = (struct regid *)dsea->impUse; |
033c9da0 | 1759 | memset(eid, 0, sizeof(*eid)); |
1da177e4 LT |
1760 | strcpy(eid->ident, UDF_ID_DEVELOPER); |
1761 | eid->identSuffix[0] = UDF_OS_CLASS_UNIX; | |
1762 | eid->identSuffix[1] = UDF_OS_ID_LINUX; | |
1763 | dsea->majorDeviceIdent = cpu_to_le32(imajor(inode)); | |
1764 | dsea->minorDeviceIdent = cpu_to_le32(iminor(inode)); | |
1765 | } | |
1766 | ||
b2527bfa SN |
1767 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1768 | lb_recorded = 0; /* No extents => no blocks! */ | |
1769 | else | |
1770 | lb_recorded = | |
1771 | (inode->i_blocks + (1 << (blocksize_bits - 9)) - 1) >> | |
1772 | (blocksize_bits - 9); | |
1773 | ||
48d6d8ff | 1774 | if (iinfo->i_efe == 0) { |
c0b34438 | 1775 | memcpy(bh->b_data + sizeof(struct fileEntry), |
48d6d8ff | 1776 | iinfo->i_ext.i_data, |
cb00ea35 | 1777 | inode->i_sb->s_blocksize - sizeof(struct fileEntry)); |
b2527bfa | 1778 | fe->logicalBlocksRecorded = cpu_to_le64(lb_recorded); |
1da177e4 | 1779 | |
c3b9cecd AB |
1780 | udf_time_to_disk_stamp(&fe->accessTime, inode->i_atime); |
1781 | udf_time_to_disk_stamp(&fe->modificationTime, inode->i_mtime); | |
1782 | udf_time_to_disk_stamp(&fe->attrTime, inode->i_ctime); | |
5ca4e4be | 1783 | memset(&(fe->impIdent), 0, sizeof(struct regid)); |
1da177e4 LT |
1784 | strcpy(fe->impIdent.ident, UDF_ID_DEVELOPER); |
1785 | fe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; | |
1786 | fe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; | |
48d6d8ff MS |
1787 | fe->uniqueID = cpu_to_le64(iinfo->i_unique); |
1788 | fe->lengthExtendedAttr = cpu_to_le32(iinfo->i_lenEAttr); | |
1789 | fe->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc); | |
d5e2cf07 | 1790 | fe->checkpoint = cpu_to_le32(iinfo->i_checkpoint); |
1da177e4 LT |
1791 | fe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_FE); |
1792 | crclen = sizeof(struct fileEntry); | |
cb00ea35 | 1793 | } else { |
4b11111a | 1794 | memcpy(bh->b_data + sizeof(struct extendedFileEntry), |
48d6d8ff | 1795 | iinfo->i_ext.i_data, |
4b11111a MS |
1796 | inode->i_sb->s_blocksize - |
1797 | sizeof(struct extendedFileEntry)); | |
ab9a3a73 SM |
1798 | efe->objectSize = |
1799 | cpu_to_le64(inode->i_size + iinfo->i_lenStreams); | |
b2527bfa | 1800 | efe->logicalBlocksRecorded = cpu_to_le64(lb_recorded); |
1da177e4 | 1801 | |
ab9a3a73 SM |
1802 | if (iinfo->i_streamdir) { |
1803 | struct long_ad *icb_lad = &efe->streamDirectoryICB; | |
1804 | ||
1805 | icb_lad->extLocation = | |
1806 | cpu_to_lelb(iinfo->i_locStreamdir); | |
1807 | icb_lad->extLength = | |
1808 | cpu_to_le32(inode->i_sb->s_blocksize); | |
1809 | } | |
1810 | ||
c3b9cecd AB |
1811 | udf_adjust_time(iinfo, inode->i_atime); |
1812 | udf_adjust_time(iinfo, inode->i_mtime); | |
1813 | udf_adjust_time(iinfo, inode->i_ctime); | |
1da177e4 | 1814 | |
c3b9cecd AB |
1815 | udf_time_to_disk_stamp(&efe->accessTime, inode->i_atime); |
1816 | udf_time_to_disk_stamp(&efe->modificationTime, inode->i_mtime); | |
56774805 | 1817 | udf_time_to_disk_stamp(&efe->createTime, iinfo->i_crtime); |
c3b9cecd | 1818 | udf_time_to_disk_stamp(&efe->attrTime, inode->i_ctime); |
1da177e4 | 1819 | |
033c9da0 | 1820 | memset(&(efe->impIdent), 0, sizeof(efe->impIdent)); |
1da177e4 LT |
1821 | strcpy(efe->impIdent.ident, UDF_ID_DEVELOPER); |
1822 | efe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; | |
1823 | efe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; | |
48d6d8ff MS |
1824 | efe->uniqueID = cpu_to_le64(iinfo->i_unique); |
1825 | efe->lengthExtendedAttr = cpu_to_le32(iinfo->i_lenEAttr); | |
1826 | efe->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc); | |
d5e2cf07 | 1827 | efe->checkpoint = cpu_to_le32(iinfo->i_checkpoint); |
1da177e4 LT |
1828 | efe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_EFE); |
1829 | crclen = sizeof(struct extendedFileEntry); | |
1830 | } | |
70f19f58 SM |
1831 | |
1832 | finish: | |
48d6d8ff | 1833 | if (iinfo->i_strat4096) { |
1da177e4 LT |
1834 | fe->icbTag.strategyType = cpu_to_le16(4096); |
1835 | fe->icbTag.strategyParameter = cpu_to_le16(1); | |
1836 | fe->icbTag.numEntries = cpu_to_le16(2); | |
cb00ea35 | 1837 | } else { |
1da177e4 LT |
1838 | fe->icbTag.strategyType = cpu_to_le16(4); |
1839 | fe->icbTag.numEntries = cpu_to_le16(1); | |
1840 | } | |
1841 | ||
70f19f58 SM |
1842 | if (iinfo->i_use) |
1843 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_USE; | |
1844 | else if (S_ISDIR(inode->i_mode)) | |
1da177e4 LT |
1845 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_DIRECTORY; |
1846 | else if (S_ISREG(inode->i_mode)) | |
1847 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_REGULAR; | |
1848 | else if (S_ISLNK(inode->i_mode)) | |
1849 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_SYMLINK; | |
1850 | else if (S_ISBLK(inode->i_mode)) | |
1851 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_BLOCK; | |
1852 | else if (S_ISCHR(inode->i_mode)) | |
1853 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_CHAR; | |
1854 | else if (S_ISFIFO(inode->i_mode)) | |
1855 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_FIFO; | |
1856 | else if (S_ISSOCK(inode->i_mode)) | |
1857 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_SOCKET; | |
1858 | ||
48d6d8ff | 1859 | icbflags = iinfo->i_alloc_type | |
28de7948 CG |
1860 | ((inode->i_mode & S_ISUID) ? ICBTAG_FLAG_SETUID : 0) | |
1861 | ((inode->i_mode & S_ISGID) ? ICBTAG_FLAG_SETGID : 0) | | |
1862 | ((inode->i_mode & S_ISVTX) ? ICBTAG_FLAG_STICKY : 0) | | |
1863 | (le16_to_cpu(fe->icbTag.flags) & | |
1864 | ~(ICBTAG_FLAG_AD_MASK | ICBTAG_FLAG_SETUID | | |
1865 | ICBTAG_FLAG_SETGID | ICBTAG_FLAG_STICKY)); | |
1da177e4 LT |
1866 | |
1867 | fe->icbTag.flags = cpu_to_le16(icbflags); | |
6c79e987 | 1868 | if (sbi->s_udfrev >= 0x0200) |
1da177e4 LT |
1869 | fe->descTag.descVersion = cpu_to_le16(3); |
1870 | else | |
1871 | fe->descTag.descVersion = cpu_to_le16(2); | |
6c79e987 | 1872 | fe->descTag.tagSerialNum = cpu_to_le16(sbi->s_serial_number); |
4b11111a | 1873 | fe->descTag.tagLocation = cpu_to_le32( |
48d6d8ff | 1874 | iinfo->i_location.logicalBlockNum); |
aae917cd | 1875 | crclen += iinfo->i_lenEAttr + iinfo->i_lenAlloc - sizeof(struct tag); |
1da177e4 | 1876 | fe->descTag.descCRCLength = cpu_to_le16(crclen); |
5ca4e4be | 1877 | fe->descTag.descCRC = cpu_to_le16(crc_itu_t(0, (char *)fe + sizeof(struct tag), |
f845fced | 1878 | crclen)); |
3f2587bb | 1879 | fe->descTag.tagChecksum = udf_tag_checksum(&fe->descTag); |
1da177e4 | 1880 | |
5833ded9 | 1881 | set_buffer_uptodate(bh); |
aae917cd JK |
1882 | unlock_buffer(bh); |
1883 | ||
1da177e4 LT |
1884 | /* write the data blocks */ |
1885 | mark_buffer_dirty(bh); | |
cb00ea35 | 1886 | if (do_sync) { |
1da177e4 | 1887 | sync_dirty_buffer(bh); |
aae917cd | 1888 | if (buffer_write_io_error(bh)) { |
78ace70c JP |
1889 | udf_warn(inode->i_sb, "IO error syncing udf inode [%08lx]\n", |
1890 | inode->i_ino); | |
1da177e4 LT |
1891 | err = -EIO; |
1892 | } | |
1893 | } | |
3bf25cb4 | 1894 | brelse(bh); |
28de7948 | 1895 | |
1da177e4 LT |
1896 | return err; |
1897 | } | |
1898 | ||
6174c2eb JK |
1899 | struct inode *__udf_iget(struct super_block *sb, struct kernel_lb_addr *ino, |
1900 | bool hidden_inode) | |
1da177e4 LT |
1901 | { |
1902 | unsigned long block = udf_get_lb_pblock(sb, ino, 0); | |
1903 | struct inode *inode = iget_locked(sb, block); | |
6d3d5e86 | 1904 | int err; |
1da177e4 LT |
1905 | |
1906 | if (!inode) | |
6d3d5e86 | 1907 | return ERR_PTR(-ENOMEM); |
1da177e4 | 1908 | |
6d3d5e86 JK |
1909 | if (!(inode->i_state & I_NEW)) |
1910 | return inode; | |
1da177e4 | 1911 | |
6d3d5e86 | 1912 | memcpy(&UDF_I(inode)->i_location, ino, sizeof(struct kernel_lb_addr)); |
6174c2eb | 1913 | err = udf_read_inode(inode, hidden_inode); |
6d3d5e86 JK |
1914 | if (err < 0) { |
1915 | iget_failed(inode); | |
1916 | return ERR_PTR(err); | |
1da177e4 | 1917 | } |
6d3d5e86 | 1918 | unlock_new_inode(inode); |
1da177e4 LT |
1919 | |
1920 | return inode; | |
1da177e4 LT |
1921 | } |
1922 | ||
b490bdd6 | 1923 | int udf_setup_indirect_aext(struct inode *inode, udf_pblk_t block, |
fcea62ba | 1924 | struct extent_position *epos) |
1da177e4 | 1925 | { |
fcea62ba JK |
1926 | struct super_block *sb = inode->i_sb; |
1927 | struct buffer_head *bh; | |
1da177e4 | 1928 | struct allocExtDesc *aed; |
fcea62ba JK |
1929 | struct extent_position nepos; |
1930 | struct kernel_lb_addr neloc; | |
1931 | int ver, adsize; | |
1da177e4 | 1932 | |
fcea62ba JK |
1933 | if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
1934 | adsize = sizeof(struct short_ad); | |
1935 | else if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_LONG) | |
1936 | adsize = sizeof(struct long_ad); | |
1da177e4 | 1937 | else |
4f1b1519 | 1938 | return -EIO; |
fcea62ba JK |
1939 | |
1940 | neloc.logicalBlockNum = block; | |
1941 | neloc.partitionReferenceNum = epos->block.partitionReferenceNum; | |
1942 | ||
1943 | bh = udf_tgetblk(sb, udf_get_lb_pblock(sb, &neloc, 0)); | |
1944 | if (!bh) | |
1945 | return -EIO; | |
1946 | lock_buffer(bh); | |
1947 | memset(bh->b_data, 0x00, sb->s_blocksize); | |
1948 | set_buffer_uptodate(bh); | |
1949 | unlock_buffer(bh); | |
1950 | mark_buffer_dirty_inode(bh, inode); | |
1951 | ||
1952 | aed = (struct allocExtDesc *)(bh->b_data); | |
1953 | if (!UDF_QUERY_FLAG(sb, UDF_FLAG_STRICT)) { | |
1954 | aed->previousAllocExtLocation = | |
1955 | cpu_to_le32(epos->block.logicalBlockNum); | |
1956 | } | |
1957 | aed->lengthAllocDescs = cpu_to_le32(0); | |
1958 | if (UDF_SB(sb)->s_udfrev >= 0x0200) | |
1959 | ver = 3; | |
1da177e4 | 1960 | else |
fcea62ba JK |
1961 | ver = 2; |
1962 | udf_new_tag(bh->b_data, TAG_IDENT_AED, ver, 1, block, | |
1963 | sizeof(struct tag)); | |
1964 | ||
1965 | nepos.block = neloc; | |
1966 | nepos.offset = sizeof(struct allocExtDesc); | |
1967 | nepos.bh = bh; | |
1968 | ||
1969 | /* | |
1970 | * Do we have to copy current last extent to make space for indirect | |
1971 | * one? | |
1972 | */ | |
1973 | if (epos->offset + adsize > sb->s_blocksize) { | |
1974 | struct kernel_lb_addr cp_loc; | |
1975 | uint32_t cp_len; | |
1976 | int cp_type; | |
1977 | ||
1978 | epos->offset -= adsize; | |
1979 | cp_type = udf_current_aext(inode, epos, &cp_loc, &cp_len, 0); | |
1980 | cp_len |= ((uint32_t)cp_type) << 30; | |
1981 | ||
1982 | __udf_add_aext(inode, &nepos, &cp_loc, cp_len, 1); | |
1983 | udf_write_aext(inode, epos, &nepos.block, | |
800552ce | 1984 | sb->s_blocksize | EXT_NEXT_EXTENT_ALLOCDESCS, 0); |
fcea62ba JK |
1985 | } else { |
1986 | __udf_add_aext(inode, epos, &nepos.block, | |
800552ce | 1987 | sb->s_blocksize | EXT_NEXT_EXTENT_ALLOCDESCS, 0); |
fcea62ba JK |
1988 | } |
1989 | ||
1990 | brelse(epos->bh); | |
1991 | *epos = nepos; | |
1992 | ||
1993 | return 0; | |
1994 | } | |
1995 | ||
1996 | /* | |
1997 | * Append extent at the given position - should be the first free one in inode | |
1998 | * / indirect extent. This function assumes there is enough space in the inode | |
1999 | * or indirect extent. Use udf_add_aext() if you didn't check for this before. | |
2000 | */ | |
2001 | int __udf_add_aext(struct inode *inode, struct extent_position *epos, | |
2002 | struct kernel_lb_addr *eloc, uint32_t elen, int inc) | |
2003 | { | |
2004 | struct udf_inode_info *iinfo = UDF_I(inode); | |
2005 | struct allocExtDesc *aed; | |
2006 | int adsize; | |
1da177e4 | 2007 | |
48d6d8ff | 2008 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
5ca4e4be | 2009 | adsize = sizeof(struct short_ad); |
48d6d8ff | 2010 | else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
5ca4e4be | 2011 | adsize = sizeof(struct long_ad); |
1da177e4 | 2012 | else |
7e49b6f2 | 2013 | return -EIO; |
1da177e4 | 2014 | |
fcea62ba JK |
2015 | if (!epos->bh) { |
2016 | WARN_ON(iinfo->i_lenAlloc != | |
2017 | epos->offset - udf_file_entry_alloc_offset(inode)); | |
2018 | } else { | |
2019 | aed = (struct allocExtDesc *)epos->bh->b_data; | |
2020 | WARN_ON(le32_to_cpu(aed->lengthAllocDescs) != | |
2021 | epos->offset - sizeof(struct allocExtDesc)); | |
2022 | WARN_ON(epos->offset + adsize > inode->i_sb->s_blocksize); | |
1da177e4 LT |
2023 | } |
2024 | ||
7e49b6f2 | 2025 | udf_write_aext(inode, epos, eloc, elen, inc); |
1da177e4 | 2026 | |
cb00ea35 | 2027 | if (!epos->bh) { |
48d6d8ff | 2028 | iinfo->i_lenAlloc += adsize; |
1da177e4 | 2029 | mark_inode_dirty(inode); |
cb00ea35 | 2030 | } else { |
ff116fc8 | 2031 | aed = (struct allocExtDesc *)epos->bh->b_data; |
c2104fda | 2032 | le32_add_cpu(&aed->lengthAllocDescs, adsize); |
4b11111a MS |
2033 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
2034 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) | |
2035 | udf_update_tag(epos->bh->b_data, | |
2036 | epos->offset + (inc ? 0 : adsize)); | |
1da177e4 | 2037 | else |
4b11111a MS |
2038 | udf_update_tag(epos->bh->b_data, |
2039 | sizeof(struct allocExtDesc)); | |
ff116fc8 | 2040 | mark_buffer_dirty_inode(epos->bh, inode); |
1da177e4 LT |
2041 | } |
2042 | ||
7e49b6f2 | 2043 | return 0; |
1da177e4 LT |
2044 | } |
2045 | ||
fcea62ba JK |
2046 | /* |
2047 | * Append extent at given position - should be the first free one in inode | |
2048 | * / indirect extent. Takes care of allocating and linking indirect blocks. | |
2049 | */ | |
2050 | int udf_add_aext(struct inode *inode, struct extent_position *epos, | |
2051 | struct kernel_lb_addr *eloc, uint32_t elen, int inc) | |
2052 | { | |
2053 | int adsize; | |
2054 | struct super_block *sb = inode->i_sb; | |
2055 | ||
2056 | if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_SHORT) | |
2057 | adsize = sizeof(struct short_ad); | |
2058 | else if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_LONG) | |
2059 | adsize = sizeof(struct long_ad); | |
2060 | else | |
2061 | return -EIO; | |
2062 | ||
2063 | if (epos->offset + (2 * adsize) > sb->s_blocksize) { | |
2064 | int err; | |
b490bdd6 | 2065 | udf_pblk_t new_block; |
fcea62ba JK |
2066 | |
2067 | new_block = udf_new_block(sb, NULL, | |
2068 | epos->block.partitionReferenceNum, | |
2069 | epos->block.logicalBlockNum, &err); | |
2070 | if (!new_block) | |
2071 | return -ENOSPC; | |
2072 | ||
2073 | err = udf_setup_indirect_aext(inode, new_block, epos); | |
2074 | if (err) | |
2075 | return err; | |
2076 | } | |
2077 | ||
2078 | return __udf_add_aext(inode, epos, eloc, elen, inc); | |
2079 | } | |
2080 | ||
7e49b6f2 JK |
2081 | void udf_write_aext(struct inode *inode, struct extent_position *epos, |
2082 | struct kernel_lb_addr *eloc, uint32_t elen, int inc) | |
1da177e4 LT |
2083 | { |
2084 | int adsize; | |
2085 | uint8_t *ptr; | |
5ca4e4be PE |
2086 | struct short_ad *sad; |
2087 | struct long_ad *lad; | |
48d6d8ff | 2088 | struct udf_inode_info *iinfo = UDF_I(inode); |
1da177e4 | 2089 | |
ff116fc8 | 2090 | if (!epos->bh) |
48d6d8ff | 2091 | ptr = iinfo->i_ext.i_data + epos->offset - |
4b11111a | 2092 | udf_file_entry_alloc_offset(inode) + |
48d6d8ff | 2093 | iinfo->i_lenEAttr; |
1da177e4 | 2094 | else |
ff116fc8 | 2095 | ptr = epos->bh->b_data + epos->offset; |
1da177e4 | 2096 | |
48d6d8ff | 2097 | switch (iinfo->i_alloc_type) { |
cb00ea35 | 2098 | case ICBTAG_FLAG_AD_SHORT: |
5ca4e4be | 2099 | sad = (struct short_ad *)ptr; |
28de7948 | 2100 | sad->extLength = cpu_to_le32(elen); |
97e961fd | 2101 | sad->extPosition = cpu_to_le32(eloc->logicalBlockNum); |
5ca4e4be | 2102 | adsize = sizeof(struct short_ad); |
28de7948 | 2103 | break; |
cb00ea35 | 2104 | case ICBTAG_FLAG_AD_LONG: |
5ca4e4be | 2105 | lad = (struct long_ad *)ptr; |
28de7948 | 2106 | lad->extLength = cpu_to_le32(elen); |
97e961fd | 2107 | lad->extLocation = cpu_to_lelb(*eloc); |
28de7948 | 2108 | memset(lad->impUse, 0x00, sizeof(lad->impUse)); |
5ca4e4be | 2109 | adsize = sizeof(struct long_ad); |
28de7948 | 2110 | break; |
cb00ea35 | 2111 | default: |
7e49b6f2 | 2112 | return; |
1da177e4 LT |
2113 | } |
2114 | ||
cb00ea35 | 2115 | if (epos->bh) { |
28de7948 | 2116 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
6c79e987 | 2117 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) { |
4b11111a MS |
2118 | struct allocExtDesc *aed = |
2119 | (struct allocExtDesc *)epos->bh->b_data; | |
ff116fc8 | 2120 | udf_update_tag(epos->bh->b_data, |
4b11111a MS |
2121 | le32_to_cpu(aed->lengthAllocDescs) + |
2122 | sizeof(struct allocExtDesc)); | |
1da177e4 | 2123 | } |
ff116fc8 | 2124 | mark_buffer_dirty_inode(epos->bh, inode); |
28de7948 | 2125 | } else { |
1da177e4 | 2126 | mark_inode_dirty(inode); |
28de7948 | 2127 | } |
1da177e4 LT |
2128 | |
2129 | if (inc) | |
ff116fc8 | 2130 | epos->offset += adsize; |
1da177e4 LT |
2131 | } |
2132 | ||
b0918d9f VN |
2133 | /* |
2134 | * Only 1 indirect extent in a row really makes sense but allow upto 16 in case | |
2135 | * someone does some weird stuff. | |
2136 | */ | |
2137 | #define UDF_MAX_INDIR_EXTS 16 | |
2138 | ||
4b11111a | 2139 | int8_t udf_next_aext(struct inode *inode, struct extent_position *epos, |
5ca4e4be | 2140 | struct kernel_lb_addr *eloc, uint32_t *elen, int inc) |
1da177e4 LT |
2141 | { |
2142 | int8_t etype; | |
b0918d9f | 2143 | unsigned int indirections = 0; |
1da177e4 | 2144 | |
ff116fc8 | 2145 | while ((etype = udf_current_aext(inode, epos, eloc, elen, inc)) == |
800552ce | 2146 | (EXT_NEXT_EXTENT_ALLOCDESCS >> 30)) { |
b490bdd6 | 2147 | udf_pblk_t block; |
b0918d9f VN |
2148 | |
2149 | if (++indirections > UDF_MAX_INDIR_EXTS) { | |
2150 | udf_err(inode->i_sb, | |
2151 | "too many indirect extents in inode %lu\n", | |
2152 | inode->i_ino); | |
2153 | return -1; | |
2154 | } | |
2155 | ||
ff116fc8 JK |
2156 | epos->block = *eloc; |
2157 | epos->offset = sizeof(struct allocExtDesc); | |
3bf25cb4 | 2158 | brelse(epos->bh); |
97e961fd | 2159 | block = udf_get_lb_pblock(inode->i_sb, &epos->block, 0); |
4b11111a MS |
2160 | epos->bh = udf_tread(inode->i_sb, block); |
2161 | if (!epos->bh) { | |
fcbf7637 | 2162 | udf_debug("reading block %u failed!\n", block); |
1da177e4 LT |
2163 | return -1; |
2164 | } | |
2165 | } | |
2166 | ||
2167 | return etype; | |
2168 | } | |
2169 | ||
4b11111a | 2170 | int8_t udf_current_aext(struct inode *inode, struct extent_position *epos, |
5ca4e4be | 2171 | struct kernel_lb_addr *eloc, uint32_t *elen, int inc) |
1da177e4 LT |
2172 | { |
2173 | int alen; | |
2174 | int8_t etype; | |
2175 | uint8_t *ptr; | |
5ca4e4be PE |
2176 | struct short_ad *sad; |
2177 | struct long_ad *lad; | |
48d6d8ff | 2178 | struct udf_inode_info *iinfo = UDF_I(inode); |
28de7948 | 2179 | |
cb00ea35 | 2180 | if (!epos->bh) { |
ff116fc8 JK |
2181 | if (!epos->offset) |
2182 | epos->offset = udf_file_entry_alloc_offset(inode); | |
48d6d8ff | 2183 | ptr = iinfo->i_ext.i_data + epos->offset - |
4b11111a | 2184 | udf_file_entry_alloc_offset(inode) + |
48d6d8ff | 2185 | iinfo->i_lenEAttr; |
4b11111a | 2186 | alen = udf_file_entry_alloc_offset(inode) + |
48d6d8ff | 2187 | iinfo->i_lenAlloc; |
cb00ea35 | 2188 | } else { |
ff116fc8 JK |
2189 | if (!epos->offset) |
2190 | epos->offset = sizeof(struct allocExtDesc); | |
2191 | ptr = epos->bh->b_data + epos->offset; | |
28de7948 | 2192 | alen = sizeof(struct allocExtDesc) + |
4b11111a MS |
2193 | le32_to_cpu(((struct allocExtDesc *)epos->bh->b_data)-> |
2194 | lengthAllocDescs); | |
1da177e4 LT |
2195 | } |
2196 | ||
48d6d8ff | 2197 | switch (iinfo->i_alloc_type) { |
cb00ea35 | 2198 | case ICBTAG_FLAG_AD_SHORT: |
4b11111a MS |
2199 | sad = udf_get_fileshortad(ptr, alen, &epos->offset, inc); |
2200 | if (!sad) | |
28de7948 CG |
2201 | return -1; |
2202 | etype = le32_to_cpu(sad->extLength) >> 30; | |
2203 | eloc->logicalBlockNum = le32_to_cpu(sad->extPosition); | |
4b11111a | 2204 | eloc->partitionReferenceNum = |
48d6d8ff | 2205 | iinfo->i_location.partitionReferenceNum; |
28de7948 CG |
2206 | *elen = le32_to_cpu(sad->extLength) & UDF_EXTENT_LENGTH_MASK; |
2207 | break; | |
cb00ea35 | 2208 | case ICBTAG_FLAG_AD_LONG: |
4b11111a MS |
2209 | lad = udf_get_filelongad(ptr, alen, &epos->offset, inc); |
2210 | if (!lad) | |
1da177e4 | 2211 | return -1; |
28de7948 CG |
2212 | etype = le32_to_cpu(lad->extLength) >> 30; |
2213 | *eloc = lelb_to_cpu(lad->extLocation); | |
2214 | *elen = le32_to_cpu(lad->extLength) & UDF_EXTENT_LENGTH_MASK; | |
2215 | break; | |
2216 | default: | |
fcbf7637 | 2217 | udf_debug("alloc_type = %u unsupported\n", iinfo->i_alloc_type); |
28de7948 | 2218 | return -1; |
1da177e4 LT |
2219 | } |
2220 | ||
2221 | return etype; | |
2222 | } | |
2223 | ||
28de7948 | 2224 | static int8_t udf_insert_aext(struct inode *inode, struct extent_position epos, |
5ca4e4be | 2225 | struct kernel_lb_addr neloc, uint32_t nelen) |
1da177e4 | 2226 | { |
5ca4e4be | 2227 | struct kernel_lb_addr oeloc; |
1da177e4 LT |
2228 | uint32_t oelen; |
2229 | int8_t etype; | |
2230 | ||
ff116fc8 | 2231 | if (epos.bh) |
3bf25cb4 | 2232 | get_bh(epos.bh); |
1da177e4 | 2233 | |
cb00ea35 | 2234 | while ((etype = udf_next_aext(inode, &epos, &oeloc, &oelen, 0)) != -1) { |
97e961fd | 2235 | udf_write_aext(inode, &epos, &neloc, nelen, 1); |
1da177e4 LT |
2236 | neloc = oeloc; |
2237 | nelen = (etype << 30) | oelen; | |
2238 | } | |
97e961fd | 2239 | udf_add_aext(inode, &epos, &neloc, nelen, 1); |
3bf25cb4 | 2240 | brelse(epos.bh); |
28de7948 | 2241 | |
1da177e4 LT |
2242 | return (nelen >> 30); |
2243 | } | |
2244 | ||
6c1e4d06 | 2245 | int8_t udf_delete_aext(struct inode *inode, struct extent_position epos) |
1da177e4 | 2246 | { |
ff116fc8 JK |
2247 | struct extent_position oepos; |
2248 | int adsize; | |
1da177e4 LT |
2249 | int8_t etype; |
2250 | struct allocExtDesc *aed; | |
48d6d8ff | 2251 | struct udf_inode_info *iinfo; |
6c1e4d06 JK |
2252 | struct kernel_lb_addr eloc; |
2253 | uint32_t elen; | |
1da177e4 | 2254 | |
cb00ea35 | 2255 | if (epos.bh) { |
3bf25cb4 JK |
2256 | get_bh(epos.bh); |
2257 | get_bh(epos.bh); | |
1da177e4 LT |
2258 | } |
2259 | ||
48d6d8ff MS |
2260 | iinfo = UDF_I(inode); |
2261 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) | |
5ca4e4be | 2262 | adsize = sizeof(struct short_ad); |
48d6d8ff | 2263 | else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
5ca4e4be | 2264 | adsize = sizeof(struct long_ad); |
1da177e4 LT |
2265 | else |
2266 | adsize = 0; | |
2267 | ||
ff116fc8 JK |
2268 | oepos = epos; |
2269 | if (udf_next_aext(inode, &epos, &eloc, &elen, 1) == -1) | |
1da177e4 LT |
2270 | return -1; |
2271 | ||
cb00ea35 | 2272 | while ((etype = udf_next_aext(inode, &epos, &eloc, &elen, 1)) != -1) { |
97e961fd | 2273 | udf_write_aext(inode, &oepos, &eloc, (etype << 30) | elen, 1); |
cb00ea35 | 2274 | if (oepos.bh != epos.bh) { |
ff116fc8 | 2275 | oepos.block = epos.block; |
3bf25cb4 JK |
2276 | brelse(oepos.bh); |
2277 | get_bh(epos.bh); | |
ff116fc8 JK |
2278 | oepos.bh = epos.bh; |
2279 | oepos.offset = epos.offset - adsize; | |
1da177e4 LT |
2280 | } |
2281 | } | |
5ca4e4be | 2282 | memset(&eloc, 0x00, sizeof(struct kernel_lb_addr)); |
1da177e4 LT |
2283 | elen = 0; |
2284 | ||
cb00ea35 | 2285 | if (epos.bh != oepos.bh) { |
97e961fd PE |
2286 | udf_free_blocks(inode->i_sb, inode, &epos.block, 0, 1); |
2287 | udf_write_aext(inode, &oepos, &eloc, elen, 1); | |
2288 | udf_write_aext(inode, &oepos, &eloc, elen, 1); | |
cb00ea35 | 2289 | if (!oepos.bh) { |
48d6d8ff | 2290 | iinfo->i_lenAlloc -= (adsize * 2); |
1da177e4 | 2291 | mark_inode_dirty(inode); |
cb00ea35 | 2292 | } else { |
ff116fc8 | 2293 | aed = (struct allocExtDesc *)oepos.bh->b_data; |
c2104fda | 2294 | le32_add_cpu(&aed->lengthAllocDescs, -(2 * adsize)); |
28de7948 | 2295 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
6c79e987 | 2296 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) |
4b11111a MS |
2297 | udf_update_tag(oepos.bh->b_data, |
2298 | oepos.offset - (2 * adsize)); | |
1da177e4 | 2299 | else |
4b11111a MS |
2300 | udf_update_tag(oepos.bh->b_data, |
2301 | sizeof(struct allocExtDesc)); | |
ff116fc8 | 2302 | mark_buffer_dirty_inode(oepos.bh, inode); |
1da177e4 | 2303 | } |
cb00ea35 | 2304 | } else { |
97e961fd | 2305 | udf_write_aext(inode, &oepos, &eloc, elen, 1); |
cb00ea35 | 2306 | if (!oepos.bh) { |
48d6d8ff | 2307 | iinfo->i_lenAlloc -= adsize; |
1da177e4 | 2308 | mark_inode_dirty(inode); |
cb00ea35 | 2309 | } else { |
ff116fc8 | 2310 | aed = (struct allocExtDesc *)oepos.bh->b_data; |
c2104fda | 2311 | le32_add_cpu(&aed->lengthAllocDescs, -adsize); |
28de7948 | 2312 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
6c79e987 | 2313 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) |
4b11111a MS |
2314 | udf_update_tag(oepos.bh->b_data, |
2315 | epos.offset - adsize); | |
1da177e4 | 2316 | else |
4b11111a MS |
2317 | udf_update_tag(oepos.bh->b_data, |
2318 | sizeof(struct allocExtDesc)); | |
ff116fc8 | 2319 | mark_buffer_dirty_inode(oepos.bh, inode); |
1da177e4 LT |
2320 | } |
2321 | } | |
647bd61a | 2322 | |
3bf25cb4 JK |
2323 | brelse(epos.bh); |
2324 | brelse(oepos.bh); | |
28de7948 | 2325 | |
1da177e4 LT |
2326 | return (elen >> 30); |
2327 | } | |
2328 | ||
4b11111a | 2329 | int8_t inode_bmap(struct inode *inode, sector_t block, |
5ca4e4be | 2330 | struct extent_position *pos, struct kernel_lb_addr *eloc, |
4b11111a | 2331 | uint32_t *elen, sector_t *offset) |
1da177e4 | 2332 | { |
4b11111a | 2333 | unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; |
bbc9abd2 | 2334 | loff_t lbcount = 0, bcount = (loff_t) block << blocksize_bits; |
1da177e4 | 2335 | int8_t etype; |
48d6d8ff | 2336 | struct udf_inode_info *iinfo; |
1da177e4 | 2337 | |
48d6d8ff | 2338 | iinfo = UDF_I(inode); |
99600051 NJ |
2339 | if (!udf_read_extent_cache(inode, bcount, &lbcount, pos)) { |
2340 | pos->offset = 0; | |
2341 | pos->block = iinfo->i_location; | |
2342 | pos->bh = NULL; | |
2343 | } | |
1da177e4 | 2344 | *elen = 0; |
cb00ea35 | 2345 | do { |
4b11111a MS |
2346 | etype = udf_next_aext(inode, pos, eloc, elen, 1); |
2347 | if (etype == -1) { | |
2348 | *offset = (bcount - lbcount) >> blocksize_bits; | |
48d6d8ff | 2349 | iinfo->i_lenExtents = lbcount; |
1da177e4 LT |
2350 | return -1; |
2351 | } | |
2352 | lbcount += *elen; | |
2353 | } while (lbcount <= bcount); | |
99600051 | 2354 | /* update extent cache */ |
b31c9ed9 | 2355 | udf_update_extent_cache(inode, lbcount - *elen, pos); |
4b11111a | 2356 | *offset = (bcount + *elen - lbcount) >> blocksize_bits; |
1da177e4 LT |
2357 | |
2358 | return etype; | |
2359 | } | |
2360 | ||
b490bdd6 | 2361 | udf_pblk_t udf_block_map(struct inode *inode, sector_t block) |
1da177e4 | 2362 | { |
5ca4e4be | 2363 | struct kernel_lb_addr eloc; |
ff116fc8 | 2364 | uint32_t elen; |
60448b1d | 2365 | sector_t offset; |
28de7948 | 2366 | struct extent_position epos = {}; |
b490bdd6 | 2367 | udf_pblk_t ret; |
1da177e4 | 2368 | |
4d0fb621 | 2369 | down_read(&UDF_I(inode)->i_data_sem); |
1da177e4 | 2370 | |
4b11111a MS |
2371 | if (inode_bmap(inode, block, &epos, &eloc, &elen, &offset) == |
2372 | (EXT_RECORDED_ALLOCATED >> 30)) | |
97e961fd | 2373 | ret = udf_get_lb_pblock(inode->i_sb, &eloc, offset); |
1da177e4 LT |
2374 | else |
2375 | ret = 0; | |
2376 | ||
4d0fb621 | 2377 | up_read(&UDF_I(inode)->i_data_sem); |
3bf25cb4 | 2378 | brelse(epos.bh); |
1da177e4 LT |
2379 | |
2380 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_VARCONV)) | |
2381 | return udf_fixed_to_variable(ret); | |
2382 | else | |
2383 | return ret; | |
2384 | } |