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Commit | Line | Data |
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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 | ||
faa17292 | 48 | static umode_t udf_convert_permissions(struct fileEntry *); |
1da177e4 | 49 | static int udf_update_inode(struct inode *, int); |
49521de1 | 50 | static int udf_sync_inode(struct inode *inode); |
647bd61a | 51 | static int udf_alloc_i_data(struct inode *inode, size_t size); |
7b0b0933 | 52 | static sector_t inode_getblk(struct inode *, sector_t, int *, int *); |
ff116fc8 | 53 | static int8_t udf_insert_aext(struct inode *, struct extent_position, |
5ca4e4be | 54 | struct kernel_lb_addr, uint32_t); |
1da177e4 | 55 | static void udf_split_extents(struct inode *, int *, int, int, |
3cc6f844 | 56 | struct kernel_long_ad *, int *); |
1da177e4 | 57 | static void udf_prealloc_extents(struct inode *, int, int, |
3cc6f844 FF |
58 | struct kernel_long_ad *, int *); |
59 | static void udf_merge_extents(struct inode *, struct kernel_long_ad *, int *); | |
60 | static void udf_update_extents(struct inode *, struct kernel_long_ad *, int, | |
61 | int, struct extent_position *); | |
1da177e4 LT |
62 | static int udf_get_block(struct inode *, sector_t, struct buffer_head *, int); |
63 | ||
99600051 NJ |
64 | static void __udf_clear_extent_cache(struct inode *inode) |
65 | { | |
66 | struct udf_inode_info *iinfo = UDF_I(inode); | |
67 | ||
68 | if (iinfo->cached_extent.lstart != -1) { | |
69 | brelse(iinfo->cached_extent.epos.bh); | |
70 | iinfo->cached_extent.lstart = -1; | |
71 | } | |
72 | } | |
73 | ||
74 | /* Invalidate extent cache */ | |
75 | static void udf_clear_extent_cache(struct inode *inode) | |
76 | { | |
77 | struct udf_inode_info *iinfo = UDF_I(inode); | |
78 | ||
79 | spin_lock(&iinfo->i_extent_cache_lock); | |
80 | __udf_clear_extent_cache(inode); | |
81 | spin_unlock(&iinfo->i_extent_cache_lock); | |
82 | } | |
83 | ||
84 | /* Return contents of extent cache */ | |
85 | static int udf_read_extent_cache(struct inode *inode, loff_t bcount, | |
86 | loff_t *lbcount, struct extent_position *pos) | |
87 | { | |
88 | struct udf_inode_info *iinfo = UDF_I(inode); | |
89 | int ret = 0; | |
90 | ||
91 | spin_lock(&iinfo->i_extent_cache_lock); | |
92 | if ((iinfo->cached_extent.lstart <= bcount) && | |
93 | (iinfo->cached_extent.lstart != -1)) { | |
94 | /* Cache hit */ | |
95 | *lbcount = iinfo->cached_extent.lstart; | |
96 | memcpy(pos, &iinfo->cached_extent.epos, | |
97 | sizeof(struct extent_position)); | |
98 | if (pos->bh) | |
99 | get_bh(pos->bh); | |
100 | ret = 1; | |
101 | } | |
102 | spin_unlock(&iinfo->i_extent_cache_lock); | |
103 | return ret; | |
104 | } | |
105 | ||
106 | /* Add extent to extent cache */ | |
107 | static void udf_update_extent_cache(struct inode *inode, loff_t estart, | |
b31c9ed9 | 108 | struct extent_position *pos) |
99600051 NJ |
109 | { |
110 | struct udf_inode_info *iinfo = UDF_I(inode); | |
111 | ||
112 | spin_lock(&iinfo->i_extent_cache_lock); | |
113 | /* Invalidate previously cached extent */ | |
114 | __udf_clear_extent_cache(inode); | |
115 | if (pos->bh) | |
116 | get_bh(pos->bh); | |
b31c9ed9 | 117 | memcpy(&iinfo->cached_extent.epos, pos, sizeof(struct extent_position)); |
99600051 | 118 | iinfo->cached_extent.lstart = estart; |
b31c9ed9 FF |
119 | switch (iinfo->i_alloc_type) { |
120 | case ICBTAG_FLAG_AD_SHORT: | |
121 | iinfo->cached_extent.epos.offset -= sizeof(struct short_ad); | |
122 | break; | |
123 | case ICBTAG_FLAG_AD_LONG: | |
124 | iinfo->cached_extent.epos.offset -= sizeof(struct long_ad); | |
125 | break; | |
126 | } | |
99600051 NJ |
127 | spin_unlock(&iinfo->i_extent_cache_lock); |
128 | } | |
b1e32126 | 129 | |
3aac2b62 | 130 | void udf_evict_inode(struct inode *inode) |
1da177e4 | 131 | { |
2c948b3f | 132 | struct udf_inode_info *iinfo = UDF_I(inode); |
3aac2b62 AV |
133 | int want_delete = 0; |
134 | ||
3aac2b62 AV |
135 | if (!inode->i_nlink && !is_bad_inode(inode)) { |
136 | want_delete = 1; | |
7e49b6f2 | 137 | udf_setsize(inode, 0); |
3aac2b62 | 138 | udf_update_inode(inode, IS_SYNC(inode)); |
91b0abe3 JW |
139 | } |
140 | truncate_inode_pages_final(&inode->i_data); | |
3aac2b62 | 141 | invalidate_inode_buffers(inode); |
dbd5768f | 142 | clear_inode(inode); |
2c948b3f JK |
143 | if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB && |
144 | inode->i_size != iinfo->i_lenExtents) { | |
78ace70c JP |
145 | 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", |
146 | inode->i_ino, inode->i_mode, | |
147 | (unsigned long long)inode->i_size, | |
148 | (unsigned long long)iinfo->i_lenExtents); | |
1da177e4 | 149 | } |
48d6d8ff MS |
150 | kfree(iinfo->i_ext.i_data); |
151 | iinfo->i_ext.i_data = NULL; | |
99600051 | 152 | udf_clear_extent_cache(inode); |
3aac2b62 | 153 | if (want_delete) { |
3aac2b62 | 154 | udf_free_inode(inode); |
3aac2b62 | 155 | } |
1da177e4 LT |
156 | } |
157 | ||
5eec54fc IA |
158 | static void udf_write_failed(struct address_space *mapping, loff_t to) |
159 | { | |
160 | struct inode *inode = mapping->host; | |
161 | struct udf_inode_info *iinfo = UDF_I(inode); | |
162 | loff_t isize = inode->i_size; | |
163 | ||
164 | if (to > isize) { | |
7caef267 | 165 | truncate_pagecache(inode, isize); |
5eec54fc IA |
166 | if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { |
167 | down_write(&iinfo->i_data_sem); | |
99600051 | 168 | udf_clear_extent_cache(inode); |
5eec54fc IA |
169 | udf_truncate_extents(inode); |
170 | up_write(&iinfo->i_data_sem); | |
171 | } | |
172 | } | |
173 | } | |
174 | ||
1da177e4 LT |
175 | static int udf_writepage(struct page *page, struct writeback_control *wbc) |
176 | { | |
177 | return block_write_full_page(page, udf_get_block, wbc); | |
178 | } | |
179 | ||
378b8e1a NJ |
180 | static int udf_writepages(struct address_space *mapping, |
181 | struct writeback_control *wbc) | |
182 | { | |
183 | return mpage_writepages(mapping, wbc, udf_get_block); | |
184 | } | |
185 | ||
1da177e4 LT |
186 | static int udf_readpage(struct file *file, struct page *page) |
187 | { | |
bc112323 NJ |
188 | return mpage_readpage(page, udf_get_block); |
189 | } | |
190 | ||
191 | static int udf_readpages(struct file *file, struct address_space *mapping, | |
192 | struct list_head *pages, unsigned nr_pages) | |
193 | { | |
194 | return mpage_readpages(mapping, pages, nr_pages, udf_get_block); | |
1da177e4 LT |
195 | } |
196 | ||
be021ee4 NP |
197 | static int udf_write_begin(struct file *file, struct address_space *mapping, |
198 | loff_t pos, unsigned len, unsigned flags, | |
199 | struct page **pagep, void **fsdata) | |
1da177e4 | 200 | { |
155130a4 CH |
201 | int ret; |
202 | ||
203 | ret = block_write_begin(mapping, pos, len, flags, pagep, udf_get_block); | |
5eec54fc IA |
204 | if (unlikely(ret)) |
205 | udf_write_failed(mapping, pos + len); | |
206 | return ret; | |
207 | } | |
155130a4 | 208 | |
c8b8e32d | 209 | static ssize_t udf_direct_IO(struct kiocb *iocb, struct iov_iter *iter) |
5eec54fc IA |
210 | { |
211 | struct file *file = iocb->ki_filp; | |
212 | struct address_space *mapping = file->f_mapping; | |
213 | struct inode *inode = mapping->host; | |
a6cbcd4a | 214 | size_t count = iov_iter_count(iter); |
5eec54fc IA |
215 | ssize_t ret; |
216 | ||
c8b8e32d | 217 | ret = blockdev_direct_IO(iocb, inode, iter, udf_get_block); |
6f673763 | 218 | if (unlikely(ret < 0 && iov_iter_rw(iter) == WRITE)) |
c8b8e32d | 219 | udf_write_failed(mapping, iocb->ki_pos + count); |
155130a4 | 220 | return ret; |
1da177e4 LT |
221 | } |
222 | ||
223 | static sector_t udf_bmap(struct address_space *mapping, sector_t block) | |
224 | { | |
cb00ea35 | 225 | return generic_block_bmap(mapping, block, udf_get_block); |
1da177e4 LT |
226 | } |
227 | ||
f5e54d6e | 228 | const struct address_space_operations udf_aops = { |
28de7948 | 229 | .readpage = udf_readpage, |
bc112323 | 230 | .readpages = udf_readpages, |
28de7948 | 231 | .writepage = udf_writepage, |
378b8e1a | 232 | .writepages = udf_writepages, |
5eec54fc IA |
233 | .write_begin = udf_write_begin, |
234 | .write_end = generic_write_end, | |
235 | .direct_IO = udf_direct_IO, | |
28de7948 | 236 | .bmap = udf_bmap, |
1da177e4 LT |
237 | }; |
238 | ||
d2eb8c35 JK |
239 | /* |
240 | * Expand file stored in ICB to a normal one-block-file | |
241 | * | |
242 | * This function requires i_data_sem for writing and releases it. | |
243 | * This function requires i_mutex held | |
244 | */ | |
7e49b6f2 | 245 | int udf_expand_file_adinicb(struct inode *inode) |
1da177e4 LT |
246 | { |
247 | struct page *page; | |
248 | char *kaddr; | |
48d6d8ff | 249 | struct udf_inode_info *iinfo = UDF_I(inode); |
7e49b6f2 | 250 | int err; |
1da177e4 LT |
251 | struct writeback_control udf_wbc = { |
252 | .sync_mode = WB_SYNC_NONE, | |
253 | .nr_to_write = 1, | |
254 | }; | |
255 | ||
5955102c | 256 | WARN_ON_ONCE(!inode_is_locked(inode)); |
48d6d8ff | 257 | if (!iinfo->i_lenAlloc) { |
1da177e4 | 258 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) |
48d6d8ff | 259 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT; |
1da177e4 | 260 | else |
48d6d8ff | 261 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG; |
7e49b6f2 JK |
262 | /* from now on we have normal address_space methods */ |
263 | inode->i_data.a_ops = &udf_aops; | |
d2eb8c35 | 264 | up_write(&iinfo->i_data_sem); |
1da177e4 | 265 | mark_inode_dirty(inode); |
7e49b6f2 | 266 | return 0; |
1da177e4 | 267 | } |
d2eb8c35 JK |
268 | /* |
269 | * Release i_data_sem so that we can lock a page - page lock ranks | |
270 | * above i_data_sem. i_mutex still protects us against file changes. | |
271 | */ | |
272 | up_write(&iinfo->i_data_sem); | |
1da177e4 | 273 | |
7e49b6f2 JK |
274 | page = find_or_create_page(inode->i_mapping, 0, GFP_NOFS); |
275 | if (!page) | |
276 | return -ENOMEM; | |
cd7619d6 | 277 | |
cb00ea35 | 278 | if (!PageUptodate(page)) { |
1da177e4 | 279 | kaddr = kmap(page); |
48d6d8ff | 280 | memset(kaddr + iinfo->i_lenAlloc, 0x00, |
09cbfeaf | 281 | PAGE_SIZE - iinfo->i_lenAlloc); |
48d6d8ff MS |
282 | memcpy(kaddr, iinfo->i_ext.i_data + iinfo->i_lenEAttr, |
283 | iinfo->i_lenAlloc); | |
1da177e4 LT |
284 | flush_dcache_page(page); |
285 | SetPageUptodate(page); | |
286 | kunmap(page); | |
287 | } | |
d2eb8c35 | 288 | down_write(&iinfo->i_data_sem); |
48d6d8ff MS |
289 | memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr, 0x00, |
290 | iinfo->i_lenAlloc); | |
291 | iinfo->i_lenAlloc = 0; | |
1da177e4 | 292 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) |
48d6d8ff | 293 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT; |
1da177e4 | 294 | else |
48d6d8ff | 295 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG; |
7e49b6f2 JK |
296 | /* from now on we have normal address_space methods */ |
297 | inode->i_data.a_ops = &udf_aops; | |
d2eb8c35 | 298 | up_write(&iinfo->i_data_sem); |
7e49b6f2 JK |
299 | err = inode->i_data.a_ops->writepage(page, &udf_wbc); |
300 | if (err) { | |
301 | /* Restore everything back so that we don't lose data... */ | |
302 | lock_page(page); | |
303 | kaddr = kmap(page); | |
d2eb8c35 | 304 | down_write(&iinfo->i_data_sem); |
7e49b6f2 JK |
305 | memcpy(iinfo->i_ext.i_data + iinfo->i_lenEAttr, kaddr, |
306 | inode->i_size); | |
307 | kunmap(page); | |
308 | unlock_page(page); | |
309 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB; | |
310 | inode->i_data.a_ops = &udf_adinicb_aops; | |
d2eb8c35 | 311 | up_write(&iinfo->i_data_sem); |
7e49b6f2 | 312 | } |
09cbfeaf | 313 | put_page(page); |
1da177e4 | 314 | mark_inode_dirty(inode); |
7e49b6f2 JK |
315 | |
316 | return err; | |
1da177e4 LT |
317 | } |
318 | ||
cb00ea35 CG |
319 | struct buffer_head *udf_expand_dir_adinicb(struct inode *inode, int *block, |
320 | int *err) | |
1da177e4 LT |
321 | { |
322 | int newblock; | |
ff116fc8 | 323 | struct buffer_head *dbh = NULL; |
5ca4e4be | 324 | struct kernel_lb_addr eloc; |
1da177e4 | 325 | uint8_t alloctype; |
ff116fc8 | 326 | struct extent_position epos; |
1da177e4 LT |
327 | |
328 | struct udf_fileident_bh sfibh, dfibh; | |
af793295 JK |
329 | loff_t f_pos = udf_ext0_offset(inode); |
330 | int size = udf_ext0_offset(inode) + inode->i_size; | |
1da177e4 | 331 | struct fileIdentDesc cfi, *sfi, *dfi; |
48d6d8ff | 332 | struct udf_inode_info *iinfo = UDF_I(inode); |
1da177e4 LT |
333 | |
334 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) | |
335 | alloctype = ICBTAG_FLAG_AD_SHORT; | |
336 | else | |
337 | alloctype = ICBTAG_FLAG_AD_LONG; | |
338 | ||
cb00ea35 | 339 | if (!inode->i_size) { |
48d6d8ff | 340 | iinfo->i_alloc_type = alloctype; |
1da177e4 LT |
341 | mark_inode_dirty(inode); |
342 | return NULL; | |
343 | } | |
344 | ||
345 | /* alloc block, and copy data to it */ | |
346 | *block = udf_new_block(inode->i_sb, inode, | |
48d6d8ff MS |
347 | iinfo->i_location.partitionReferenceNum, |
348 | iinfo->i_location.logicalBlockNum, err); | |
1da177e4 LT |
349 | if (!(*block)) |
350 | return NULL; | |
351 | newblock = udf_get_pblock(inode->i_sb, *block, | |
48d6d8ff | 352 | iinfo->i_location.partitionReferenceNum, |
c0b34438 | 353 | 0); |
1da177e4 LT |
354 | if (!newblock) |
355 | return NULL; | |
356 | dbh = udf_tgetblk(inode->i_sb, newblock); | |
357 | if (!dbh) | |
358 | return NULL; | |
359 | lock_buffer(dbh); | |
360 | memset(dbh->b_data, 0x00, inode->i_sb->s_blocksize); | |
361 | set_buffer_uptodate(dbh); | |
362 | unlock_buffer(dbh); | |
363 | mark_buffer_dirty_inode(dbh, inode); | |
364 | ||
4b11111a | 365 | sfibh.soffset = sfibh.eoffset = |
af793295 | 366 | f_pos & (inode->i_sb->s_blocksize - 1); |
ff116fc8 | 367 | sfibh.sbh = sfibh.ebh = NULL; |
1da177e4 LT |
368 | dfibh.soffset = dfibh.eoffset = 0; |
369 | dfibh.sbh = dfibh.ebh = dbh; | |
af793295 | 370 | while (f_pos < size) { |
48d6d8ff | 371 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB; |
4b11111a MS |
372 | sfi = udf_fileident_read(inode, &f_pos, &sfibh, &cfi, NULL, |
373 | NULL, NULL, NULL); | |
cb00ea35 | 374 | if (!sfi) { |
3bf25cb4 | 375 | brelse(dbh); |
1da177e4 LT |
376 | return NULL; |
377 | } | |
48d6d8ff | 378 | iinfo->i_alloc_type = alloctype; |
1da177e4 LT |
379 | sfi->descTag.tagLocation = cpu_to_le32(*block); |
380 | dfibh.soffset = dfibh.eoffset; | |
381 | dfibh.eoffset += (sfibh.eoffset - sfibh.soffset); | |
382 | dfi = (struct fileIdentDesc *)(dbh->b_data + dfibh.soffset); | |
383 | if (udf_write_fi(inode, sfi, dfi, &dfibh, sfi->impUse, | |
4b11111a MS |
384 | sfi->fileIdent + |
385 | le16_to_cpu(sfi->lengthOfImpUse))) { | |
48d6d8ff | 386 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB; |
3bf25cb4 | 387 | brelse(dbh); |
1da177e4 LT |
388 | return NULL; |
389 | } | |
390 | } | |
391 | mark_buffer_dirty_inode(dbh, inode); | |
392 | ||
48d6d8ff MS |
393 | memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr, 0, |
394 | iinfo->i_lenAlloc); | |
395 | iinfo->i_lenAlloc = 0; | |
1da177e4 | 396 | eloc.logicalBlockNum = *block; |
4b11111a | 397 | eloc.partitionReferenceNum = |
48d6d8ff | 398 | iinfo->i_location.partitionReferenceNum; |
2c948b3f | 399 | iinfo->i_lenExtents = inode->i_size; |
ff116fc8 | 400 | epos.bh = NULL; |
48d6d8ff | 401 | epos.block = iinfo->i_location; |
ff116fc8 | 402 | epos.offset = udf_file_entry_alloc_offset(inode); |
2c948b3f | 403 | udf_add_aext(inode, &epos, &eloc, inode->i_size, 0); |
1da177e4 LT |
404 | /* UniqueID stuff */ |
405 | ||
3bf25cb4 | 406 | brelse(epos.bh); |
1da177e4 LT |
407 | mark_inode_dirty(inode); |
408 | return dbh; | |
409 | } | |
410 | ||
cb00ea35 CG |
411 | static int udf_get_block(struct inode *inode, sector_t block, |
412 | struct buffer_head *bh_result, int create) | |
1da177e4 LT |
413 | { |
414 | int err, new; | |
1ed16171 | 415 | sector_t phys = 0; |
48d6d8ff | 416 | struct udf_inode_info *iinfo; |
1da177e4 | 417 | |
cb00ea35 | 418 | if (!create) { |
1da177e4 LT |
419 | phys = udf_block_map(inode, block); |
420 | if (phys) | |
421 | map_bh(bh_result, inode->i_sb, phys); | |
422 | return 0; | |
423 | } | |
424 | ||
425 | err = -EIO; | |
426 | new = 0; | |
48d6d8ff | 427 | iinfo = UDF_I(inode); |
4d0fb621 AIB |
428 | |
429 | down_write(&iinfo->i_data_sem); | |
48d6d8ff MS |
430 | if (block == iinfo->i_next_alloc_block + 1) { |
431 | iinfo->i_next_alloc_block++; | |
432 | iinfo->i_next_alloc_goal++; | |
1da177e4 LT |
433 | } |
434 | ||
99600051 | 435 | udf_clear_extent_cache(inode); |
7b0b0933 JK |
436 | phys = inode_getblk(inode, block, &err, &new); |
437 | if (!phys) | |
1da177e4 | 438 | goto abort; |
1da177e4 LT |
439 | |
440 | if (new) | |
441 | set_buffer_new(bh_result); | |
442 | map_bh(bh_result, inode->i_sb, phys); | |
28de7948 CG |
443 | |
444 | abort: | |
4d0fb621 | 445 | up_write(&iinfo->i_data_sem); |
1da177e4 | 446 | return err; |
1da177e4 LT |
447 | } |
448 | ||
cb00ea35 CG |
449 | static struct buffer_head *udf_getblk(struct inode *inode, long block, |
450 | int create, int *err) | |
1da177e4 | 451 | { |
28de7948 | 452 | struct buffer_head *bh; |
1da177e4 LT |
453 | struct buffer_head dummy; |
454 | ||
455 | dummy.b_state = 0; | |
456 | dummy.b_blocknr = -1000; | |
457 | *err = udf_get_block(inode, block, &dummy, create); | |
cb00ea35 | 458 | if (!*err && buffer_mapped(&dummy)) { |
1da177e4 | 459 | bh = sb_getblk(inode->i_sb, dummy.b_blocknr); |
cb00ea35 | 460 | if (buffer_new(&dummy)) { |
1da177e4 LT |
461 | lock_buffer(bh); |
462 | memset(bh->b_data, 0x00, inode->i_sb->s_blocksize); | |
463 | set_buffer_uptodate(bh); | |
464 | unlock_buffer(bh); | |
465 | mark_buffer_dirty_inode(bh, inode); | |
466 | } | |
467 | return bh; | |
468 | } | |
28de7948 | 469 | |
1da177e4 LT |
470 | return NULL; |
471 | } | |
472 | ||
31170b6a | 473 | /* Extend the file by 'blocks' blocks, return the number of extents added */ |
7e49b6f2 JK |
474 | static int udf_do_extend_file(struct inode *inode, |
475 | struct extent_position *last_pos, | |
476 | struct kernel_long_ad *last_ext, | |
477 | sector_t blocks) | |
31170b6a JK |
478 | { |
479 | sector_t add; | |
480 | int count = 0, fake = !(last_ext->extLength & UDF_EXTENT_LENGTH_MASK); | |
481 | struct super_block *sb = inode->i_sb; | |
5ca4e4be | 482 | struct kernel_lb_addr prealloc_loc = {}; |
31170b6a | 483 | int prealloc_len = 0; |
48d6d8ff | 484 | struct udf_inode_info *iinfo; |
7e49b6f2 | 485 | int err; |
31170b6a JK |
486 | |
487 | /* The previous extent is fake and we should not extend by anything | |
488 | * - there's nothing to do... */ | |
489 | if (!blocks && fake) | |
490 | return 0; | |
28de7948 | 491 | |
48d6d8ff | 492 | iinfo = UDF_I(inode); |
31170b6a JK |
493 | /* Round the last extent up to a multiple of block size */ |
494 | if (last_ext->extLength & (sb->s_blocksize - 1)) { | |
495 | last_ext->extLength = | |
28de7948 CG |
496 | (last_ext->extLength & UDF_EXTENT_FLAG_MASK) | |
497 | (((last_ext->extLength & UDF_EXTENT_LENGTH_MASK) + | |
498 | sb->s_blocksize - 1) & ~(sb->s_blocksize - 1)); | |
48d6d8ff MS |
499 | iinfo->i_lenExtents = |
500 | (iinfo->i_lenExtents + sb->s_blocksize - 1) & | |
28de7948 | 501 | ~(sb->s_blocksize - 1); |
31170b6a | 502 | } |
28de7948 | 503 | |
31170b6a | 504 | /* Last extent are just preallocated blocks? */ |
4b11111a MS |
505 | if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) == |
506 | EXT_NOT_RECORDED_ALLOCATED) { | |
31170b6a JK |
507 | /* Save the extent so that we can reattach it to the end */ |
508 | prealloc_loc = last_ext->extLocation; | |
509 | prealloc_len = last_ext->extLength; | |
510 | /* Mark the extent as a hole */ | |
511 | last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | | |
28de7948 | 512 | (last_ext->extLength & UDF_EXTENT_LENGTH_MASK); |
31170b6a | 513 | last_ext->extLocation.logicalBlockNum = 0; |
4b11111a | 514 | last_ext->extLocation.partitionReferenceNum = 0; |
31170b6a | 515 | } |
28de7948 | 516 | |
31170b6a | 517 | /* Can we merge with the previous extent? */ |
4b11111a MS |
518 | if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) == |
519 | EXT_NOT_RECORDED_NOT_ALLOCATED) { | |
520 | add = ((1 << 30) - sb->s_blocksize - | |
521 | (last_ext->extLength & UDF_EXTENT_LENGTH_MASK)) >> | |
522 | sb->s_blocksize_bits; | |
31170b6a JK |
523 | if (add > blocks) |
524 | add = blocks; | |
525 | blocks -= add; | |
526 | last_ext->extLength += add << sb->s_blocksize_bits; | |
527 | } | |
528 | ||
529 | if (fake) { | |
97e961fd | 530 | udf_add_aext(inode, last_pos, &last_ext->extLocation, |
cb00ea35 | 531 | last_ext->extLength, 1); |
31170b6a | 532 | count++; |
6c371578 JK |
533 | } else { |
534 | struct kernel_lb_addr tmploc; | |
535 | uint32_t tmplen; | |
536 | ||
97e961fd | 537 | udf_write_aext(inode, last_pos, &last_ext->extLocation, |
4b11111a | 538 | last_ext->extLength, 1); |
6c371578 JK |
539 | /* |
540 | * We've rewritten the last extent but there may be empty | |
541 | * indirect extent after it - enter it. | |
542 | */ | |
543 | udf_next_aext(inode, last_pos, &tmploc, &tmplen, 0); | |
544 | } | |
28de7948 | 545 | |
31170b6a JK |
546 | /* Managed to do everything necessary? */ |
547 | if (!blocks) | |
548 | goto out; | |
549 | ||
550 | /* All further extents will be NOT_RECORDED_NOT_ALLOCATED */ | |
551 | last_ext->extLocation.logicalBlockNum = 0; | |
4b11111a | 552 | last_ext->extLocation.partitionReferenceNum = 0; |
28de7948 | 553 | add = (1 << (30-sb->s_blocksize_bits)) - 1; |
4b11111a MS |
554 | last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | |
555 | (add << sb->s_blocksize_bits); | |
28de7948 | 556 | |
31170b6a JK |
557 | /* Create enough extents to cover the whole hole */ |
558 | while (blocks > add) { | |
559 | blocks -= add; | |
7e49b6f2 JK |
560 | err = udf_add_aext(inode, last_pos, &last_ext->extLocation, |
561 | last_ext->extLength, 1); | |
562 | if (err) | |
563 | return err; | |
31170b6a JK |
564 | count++; |
565 | } | |
566 | if (blocks) { | |
567 | last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | | |
28de7948 | 568 | (blocks << sb->s_blocksize_bits); |
7e49b6f2 JK |
569 | err = udf_add_aext(inode, last_pos, &last_ext->extLocation, |
570 | last_ext->extLength, 1); | |
571 | if (err) | |
572 | return err; | |
31170b6a JK |
573 | count++; |
574 | } | |
28de7948 CG |
575 | |
576 | out: | |
31170b6a JK |
577 | /* Do we have some preallocated blocks saved? */ |
578 | if (prealloc_len) { | |
7e49b6f2 JK |
579 | err = udf_add_aext(inode, last_pos, &prealloc_loc, |
580 | prealloc_len, 1); | |
581 | if (err) | |
582 | return err; | |
31170b6a JK |
583 | last_ext->extLocation = prealloc_loc; |
584 | last_ext->extLength = prealloc_len; | |
585 | count++; | |
586 | } | |
28de7948 | 587 | |
31170b6a | 588 | /* last_pos should point to the last written extent... */ |
48d6d8ff | 589 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
5ca4e4be | 590 | last_pos->offset -= sizeof(struct short_ad); |
48d6d8ff | 591 | else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
5ca4e4be | 592 | last_pos->offset -= sizeof(struct long_ad); |
31170b6a | 593 | else |
7e49b6f2 | 594 | return -EIO; |
28de7948 | 595 | |
31170b6a JK |
596 | return count; |
597 | } | |
598 | ||
7e49b6f2 JK |
599 | static int udf_extend_file(struct inode *inode, loff_t newsize) |
600 | { | |
601 | ||
602 | struct extent_position epos; | |
603 | struct kernel_lb_addr eloc; | |
604 | uint32_t elen; | |
605 | int8_t etype; | |
606 | struct super_block *sb = inode->i_sb; | |
607 | sector_t first_block = newsize >> sb->s_blocksize_bits, offset; | |
608 | int adsize; | |
609 | struct udf_inode_info *iinfo = UDF_I(inode); | |
610 | struct kernel_long_ad extent; | |
611 | int err; | |
612 | ||
613 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) | |
614 | adsize = sizeof(struct short_ad); | |
615 | else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) | |
616 | adsize = sizeof(struct long_ad); | |
617 | else | |
618 | BUG(); | |
619 | ||
620 | etype = inode_bmap(inode, first_block, &epos, &eloc, &elen, &offset); | |
621 | ||
622 | /* File has extent covering the new size (could happen when extending | |
623 | * inside a block)? */ | |
624 | if (etype != -1) | |
625 | return 0; | |
626 | if (newsize & (sb->s_blocksize - 1)) | |
627 | offset++; | |
628 | /* Extended file just to the boundary of the last file block? */ | |
629 | if (offset == 0) | |
630 | return 0; | |
631 | ||
632 | /* Truncate is extending the file by 'offset' blocks */ | |
633 | if ((!epos.bh && epos.offset == udf_file_entry_alloc_offset(inode)) || | |
634 | (epos.bh && epos.offset == sizeof(struct allocExtDesc))) { | |
635 | /* File has no extents at all or has empty last | |
636 | * indirect extent! Create a fake extent... */ | |
637 | extent.extLocation.logicalBlockNum = 0; | |
638 | extent.extLocation.partitionReferenceNum = 0; | |
639 | extent.extLength = EXT_NOT_RECORDED_NOT_ALLOCATED; | |
640 | } else { | |
641 | epos.offset -= adsize; | |
642 | etype = udf_next_aext(inode, &epos, &extent.extLocation, | |
643 | &extent.extLength, 0); | |
644 | extent.extLength |= etype << 30; | |
645 | } | |
646 | err = udf_do_extend_file(inode, &epos, &extent, offset); | |
647 | if (err < 0) | |
648 | goto out; | |
649 | err = 0; | |
650 | iinfo->i_lenExtents = newsize; | |
651 | out: | |
652 | brelse(epos.bh); | |
653 | return err; | |
654 | } | |
655 | ||
7b0b0933 JK |
656 | static sector_t inode_getblk(struct inode *inode, sector_t block, |
657 | int *err, int *new) | |
1da177e4 | 658 | { |
5ca4e4be | 659 | struct kernel_long_ad laarr[EXTENT_MERGE_SIZE]; |
ff116fc8 | 660 | struct extent_position prev_epos, cur_epos, next_epos; |
1da177e4 | 661 | int count = 0, startnum = 0, endnum = 0; |
85d71244 | 662 | uint32_t elen = 0, tmpelen; |
5ca4e4be | 663 | struct kernel_lb_addr eloc, tmpeloc; |
1da177e4 | 664 | int c = 1; |
60448b1d JK |
665 | loff_t lbcount = 0, b_off = 0; |
666 | uint32_t newblocknum, newblock; | |
667 | sector_t offset = 0; | |
1da177e4 | 668 | int8_t etype; |
48d6d8ff MS |
669 | struct udf_inode_info *iinfo = UDF_I(inode); |
670 | int goal = 0, pgoal = iinfo->i_location.logicalBlockNum; | |
31170b6a | 671 | int lastblock = 0; |
fb719c59 | 672 | bool isBeyondEOF; |
1da177e4 | 673 | |
7b0b0933 JK |
674 | *err = 0; |
675 | *new = 0; | |
ff116fc8 | 676 | prev_epos.offset = udf_file_entry_alloc_offset(inode); |
48d6d8ff | 677 | prev_epos.block = iinfo->i_location; |
ff116fc8 JK |
678 | prev_epos.bh = NULL; |
679 | cur_epos = next_epos = prev_epos; | |
28de7948 | 680 | b_off = (loff_t)block << inode->i_sb->s_blocksize_bits; |
1da177e4 LT |
681 | |
682 | /* find the extent which contains the block we are looking for. | |
cb00ea35 CG |
683 | alternate between laarr[0] and laarr[1] for locations of the |
684 | current extent, and the previous extent */ | |
685 | do { | |
686 | if (prev_epos.bh != cur_epos.bh) { | |
3bf25cb4 JK |
687 | brelse(prev_epos.bh); |
688 | get_bh(cur_epos.bh); | |
ff116fc8 | 689 | prev_epos.bh = cur_epos.bh; |
1da177e4 | 690 | } |
cb00ea35 | 691 | if (cur_epos.bh != next_epos.bh) { |
3bf25cb4 JK |
692 | brelse(cur_epos.bh); |
693 | get_bh(next_epos.bh); | |
ff116fc8 | 694 | cur_epos.bh = next_epos.bh; |
1da177e4 LT |
695 | } |
696 | ||
697 | lbcount += elen; | |
698 | ||
ff116fc8 JK |
699 | prev_epos.block = cur_epos.block; |
700 | cur_epos.block = next_epos.block; | |
1da177e4 | 701 | |
ff116fc8 JK |
702 | prev_epos.offset = cur_epos.offset; |
703 | cur_epos.offset = next_epos.offset; | |
1da177e4 | 704 | |
4b11111a MS |
705 | etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 1); |
706 | if (etype == -1) | |
1da177e4 LT |
707 | break; |
708 | ||
709 | c = !c; | |
710 | ||
711 | laarr[c].extLength = (etype << 30) | elen; | |
712 | laarr[c].extLocation = eloc; | |
713 | ||
714 | if (etype != (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) | |
715 | pgoal = eloc.logicalBlockNum + | |
28de7948 CG |
716 | ((elen + inode->i_sb->s_blocksize - 1) >> |
717 | inode->i_sb->s_blocksize_bits); | |
1da177e4 | 718 | |
cb00ea35 | 719 | count++; |
1da177e4 LT |
720 | } while (lbcount + elen <= b_off); |
721 | ||
722 | b_off -= lbcount; | |
723 | offset = b_off >> inode->i_sb->s_blocksize_bits; | |
85d71244 JK |
724 | /* |
725 | * Move prev_epos and cur_epos into indirect extent if we are at | |
726 | * the pointer to it | |
727 | */ | |
728 | udf_next_aext(inode, &prev_epos, &tmpeloc, &tmpelen, 0); | |
729 | udf_next_aext(inode, &cur_epos, &tmpeloc, &tmpelen, 0); | |
1da177e4 LT |
730 | |
731 | /* if the extent is allocated and recorded, return the block | |
cb00ea35 | 732 | if the extent is not a multiple of the blocksize, round up */ |
1da177e4 | 733 | |
cb00ea35 CG |
734 | if (etype == (EXT_RECORDED_ALLOCATED >> 30)) { |
735 | if (elen & (inode->i_sb->s_blocksize - 1)) { | |
1da177e4 | 736 | elen = EXT_RECORDED_ALLOCATED | |
28de7948 CG |
737 | ((elen + inode->i_sb->s_blocksize - 1) & |
738 | ~(inode->i_sb->s_blocksize - 1)); | |
7e49b6f2 | 739 | udf_write_aext(inode, &cur_epos, &eloc, elen, 1); |
1da177e4 | 740 | } |
97e961fd | 741 | newblock = udf_get_lb_pblock(inode->i_sb, &eloc, offset); |
02d4ca49 | 742 | goto out_free; |
1da177e4 LT |
743 | } |
744 | ||
31170b6a | 745 | /* Are we beyond EOF? */ |
cb00ea35 | 746 | if (etype == -1) { |
31170b6a | 747 | int ret; |
6981498d | 748 | isBeyondEOF = true; |
31170b6a JK |
749 | if (count) { |
750 | if (c) | |
751 | laarr[0] = laarr[1]; | |
752 | startnum = 1; | |
cb00ea35 | 753 | } else { |
31170b6a | 754 | /* Create a fake extent when there's not one */ |
4b11111a | 755 | memset(&laarr[0].extLocation, 0x00, |
5ca4e4be | 756 | sizeof(struct kernel_lb_addr)); |
31170b6a | 757 | laarr[0].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED; |
7e49b6f2 | 758 | /* Will udf_do_extend_file() create real extent from |
4b11111a | 759 | a fake one? */ |
31170b6a JK |
760 | startnum = (offset > 0); |
761 | } | |
762 | /* Create extents for the hole between EOF and offset */ | |
7e49b6f2 JK |
763 | ret = udf_do_extend_file(inode, &prev_epos, laarr, offset); |
764 | if (ret < 0) { | |
7e49b6f2 | 765 | *err = ret; |
02d4ca49 FF |
766 | newblock = 0; |
767 | goto out_free; | |
31170b6a JK |
768 | } |
769 | c = 0; | |
770 | offset = 0; | |
771 | count += ret; | |
772 | /* We are not covered by a preallocated extent? */ | |
4b11111a MS |
773 | if ((laarr[0].extLength & UDF_EXTENT_FLAG_MASK) != |
774 | EXT_NOT_RECORDED_ALLOCATED) { | |
31170b6a JK |
775 | /* Is there any real extent? - otherwise we overwrite |
776 | * the fake one... */ | |
777 | if (count) | |
778 | c = !c; | |
779 | laarr[c].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | | |
28de7948 | 780 | inode->i_sb->s_blocksize; |
4b11111a | 781 | memset(&laarr[c].extLocation, 0x00, |
5ca4e4be | 782 | sizeof(struct kernel_lb_addr)); |
cb00ea35 | 783 | count++; |
31170b6a | 784 | } |
cb00ea35 | 785 | endnum = c + 1; |
1da177e4 | 786 | lastblock = 1; |
cb00ea35 | 787 | } else { |
6981498d | 788 | isBeyondEOF = false; |
1da177e4 LT |
789 | endnum = startnum = ((count > 2) ? 2 : count); |
790 | ||
4b11111a MS |
791 | /* if the current extent is in position 0, |
792 | swap it with the previous */ | |
cb00ea35 | 793 | if (!c && count != 1) { |
31170b6a JK |
794 | laarr[2] = laarr[0]; |
795 | laarr[0] = laarr[1]; | |
796 | laarr[1] = laarr[2]; | |
797 | c = 1; | |
798 | } | |
1da177e4 | 799 | |
4b11111a MS |
800 | /* if the current block is located in an extent, |
801 | read the next extent */ | |
802 | etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 0); | |
803 | if (etype != -1) { | |
cb00ea35 CG |
804 | laarr[c + 1].extLength = (etype << 30) | elen; |
805 | laarr[c + 1].extLocation = eloc; | |
806 | count++; | |
807 | startnum++; | |
808 | endnum++; | |
4b11111a | 809 | } else |
1da177e4 LT |
810 | lastblock = 1; |
811 | } | |
1da177e4 LT |
812 | |
813 | /* if the current extent is not recorded but allocated, get the | |
28de7948 | 814 | * block in the extent corresponding to the requested block */ |
4b11111a | 815 | if ((laarr[c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30)) |
1da177e4 | 816 | newblocknum = laarr[c].extLocation.logicalBlockNum + offset; |
4b11111a | 817 | else { /* otherwise, allocate a new block */ |
48d6d8ff MS |
818 | if (iinfo->i_next_alloc_block == block) |
819 | goal = iinfo->i_next_alloc_goal; | |
1da177e4 | 820 | |
cb00ea35 | 821 | if (!goal) { |
4b11111a | 822 | if (!(goal = pgoal)) /* XXX: what was intended here? */ |
48d6d8ff | 823 | goal = iinfo->i_location.logicalBlockNum + 1; |
1da177e4 LT |
824 | } |
825 | ||
4b11111a | 826 | newblocknum = udf_new_block(inode->i_sb, inode, |
48d6d8ff | 827 | iinfo->i_location.partitionReferenceNum, |
4b11111a MS |
828 | goal, err); |
829 | if (!newblocknum) { | |
1da177e4 | 830 | *err = -ENOSPC; |
02d4ca49 FF |
831 | newblock = 0; |
832 | goto out_free; | |
1da177e4 | 833 | } |
fb719c59 NJ |
834 | if (isBeyondEOF) |
835 | iinfo->i_lenExtents += inode->i_sb->s_blocksize; | |
1da177e4 LT |
836 | } |
837 | ||
4b11111a MS |
838 | /* if the extent the requsted block is located in contains multiple |
839 | * blocks, split the extent into at most three extents. blocks prior | |
840 | * to requested block, requested block, and blocks after requested | |
841 | * block */ | |
1da177e4 LT |
842 | udf_split_extents(inode, &c, offset, newblocknum, laarr, &endnum); |
843 | ||
81056dd0 JK |
844 | /* We preallocate blocks only for regular files. It also makes sense |
845 | * for directories but there's a problem when to drop the | |
846 | * preallocation. We might use some delayed work for that but I feel | |
847 | * it's overengineering for a filesystem like UDF. */ | |
848 | if (S_ISREG(inode->i_mode)) | |
849 | udf_prealloc_extents(inode, c, lastblock, laarr, &endnum); | |
1da177e4 LT |
850 | |
851 | /* merge any continuous blocks in laarr */ | |
852 | udf_merge_extents(inode, laarr, &endnum); | |
853 | ||
854 | /* write back the new extents, inserting new extents if the new number | |
28de7948 CG |
855 | * of extents is greater than the old number, and deleting extents if |
856 | * the new number of extents is less than the old number */ | |
ff116fc8 | 857 | udf_update_extents(inode, laarr, startnum, endnum, &prev_epos); |
1da177e4 | 858 | |
4b11111a | 859 | newblock = udf_get_pblock(inode->i_sb, newblocknum, |
48d6d8ff | 860 | iinfo->i_location.partitionReferenceNum, 0); |
7b0b0933 JK |
861 | if (!newblock) { |
862 | *err = -EIO; | |
02d4ca49 | 863 | goto out_free; |
7b0b0933 | 864 | } |
1da177e4 | 865 | *new = 1; |
48d6d8ff MS |
866 | iinfo->i_next_alloc_block = block; |
867 | iinfo->i_next_alloc_goal = newblocknum; | |
c2050a45 | 868 | inode->i_ctime = current_time(inode); |
1da177e4 LT |
869 | |
870 | if (IS_SYNC(inode)) | |
871 | udf_sync_inode(inode); | |
872 | else | |
873 | mark_inode_dirty(inode); | |
02d4ca49 FF |
874 | out_free: |
875 | brelse(prev_epos.bh); | |
876 | brelse(cur_epos.bh); | |
877 | brelse(next_epos.bh); | |
7b0b0933 | 878 | return newblock; |
1da177e4 LT |
879 | } |
880 | ||
cb00ea35 | 881 | static void udf_split_extents(struct inode *inode, int *c, int offset, |
3cc6f844 | 882 | int newblocknum, struct kernel_long_ad *laarr, |
cb00ea35 | 883 | int *endnum) |
1da177e4 | 884 | { |
4b11111a MS |
885 | unsigned long blocksize = inode->i_sb->s_blocksize; |
886 | unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; | |
887 | ||
1da177e4 | 888 | if ((laarr[*c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30) || |
4b11111a MS |
889 | (laarr[*c].extLength >> 30) == |
890 | (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) { | |
1da177e4 LT |
891 | int curr = *c; |
892 | int blen = ((laarr[curr].extLength & UDF_EXTENT_LENGTH_MASK) + | |
4b11111a | 893 | blocksize - 1) >> blocksize_bits; |
1da177e4 LT |
894 | int8_t etype = (laarr[curr].extLength >> 30); |
895 | ||
4b11111a | 896 | if (blen == 1) |
28de7948 | 897 | ; |
4b11111a | 898 | else if (!offset || blen == offset + 1) { |
cb00ea35 CG |
899 | laarr[curr + 2] = laarr[curr + 1]; |
900 | laarr[curr + 1] = laarr[curr]; | |
901 | } else { | |
902 | laarr[curr + 3] = laarr[curr + 1]; | |
903 | laarr[curr + 2] = laarr[curr + 1] = laarr[curr]; | |
904 | } | |
905 | ||
906 | if (offset) { | |
907 | if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30)) { | |
4b11111a | 908 | udf_free_blocks(inode->i_sb, inode, |
97e961fd | 909 | &laarr[curr].extLocation, |
4b11111a MS |
910 | 0, offset); |
911 | laarr[curr].extLength = | |
912 | EXT_NOT_RECORDED_NOT_ALLOCATED | | |
913 | (offset << blocksize_bits); | |
1da177e4 | 914 | laarr[curr].extLocation.logicalBlockNum = 0; |
4b11111a MS |
915 | laarr[curr].extLocation. |
916 | partitionReferenceNum = 0; | |
917 | } else | |
1da177e4 | 918 | laarr[curr].extLength = (etype << 30) | |
4b11111a | 919 | (offset << blocksize_bits); |
cb00ea35 CG |
920 | curr++; |
921 | (*c)++; | |
922 | (*endnum)++; | |
1da177e4 | 923 | } |
647bd61a | 924 | |
1da177e4 LT |
925 | laarr[curr].extLocation.logicalBlockNum = newblocknum; |
926 | if (etype == (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) | |
927 | laarr[curr].extLocation.partitionReferenceNum = | |
c0b34438 | 928 | UDF_I(inode)->i_location.partitionReferenceNum; |
1da177e4 | 929 | laarr[curr].extLength = EXT_RECORDED_ALLOCATED | |
4b11111a | 930 | blocksize; |
cb00ea35 | 931 | curr++; |
1da177e4 | 932 | |
cb00ea35 | 933 | if (blen != offset + 1) { |
1da177e4 | 934 | if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30)) |
4b11111a MS |
935 | laarr[curr].extLocation.logicalBlockNum += |
936 | offset + 1; | |
28de7948 | 937 | laarr[curr].extLength = (etype << 30) | |
4b11111a | 938 | ((blen - (offset + 1)) << blocksize_bits); |
cb00ea35 CG |
939 | curr++; |
940 | (*endnum)++; | |
1da177e4 LT |
941 | } |
942 | } | |
943 | } | |
944 | ||
945 | static void udf_prealloc_extents(struct inode *inode, int c, int lastblock, | |
3cc6f844 | 946 | struct kernel_long_ad *laarr, |
cb00ea35 | 947 | int *endnum) |
1da177e4 LT |
948 | { |
949 | int start, length = 0, currlength = 0, i; | |
950 | ||
cb00ea35 | 951 | if (*endnum >= (c + 1)) { |
1da177e4 LT |
952 | if (!lastblock) |
953 | return; | |
954 | else | |
955 | start = c; | |
cb00ea35 | 956 | } else { |
4b11111a MS |
957 | if ((laarr[c + 1].extLength >> 30) == |
958 | (EXT_NOT_RECORDED_ALLOCATED >> 30)) { | |
cb00ea35 | 959 | start = c + 1; |
4b11111a MS |
960 | length = currlength = |
961 | (((laarr[c + 1].extLength & | |
962 | UDF_EXTENT_LENGTH_MASK) + | |
963 | inode->i_sb->s_blocksize - 1) >> | |
964 | inode->i_sb->s_blocksize_bits); | |
965 | } else | |
1da177e4 LT |
966 | start = c; |
967 | } | |
968 | ||
cb00ea35 CG |
969 | for (i = start + 1; i <= *endnum; i++) { |
970 | if (i == *endnum) { | |
1da177e4 LT |
971 | if (lastblock) |
972 | length += UDF_DEFAULT_PREALLOC_BLOCKS; | |
4b11111a MS |
973 | } else if ((laarr[i].extLength >> 30) == |
974 | (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) { | |
975 | length += (((laarr[i].extLength & | |
976 | UDF_EXTENT_LENGTH_MASK) + | |
977 | inode->i_sb->s_blocksize - 1) >> | |
978 | inode->i_sb->s_blocksize_bits); | |
979 | } else | |
1da177e4 LT |
980 | break; |
981 | } | |
982 | ||
cb00ea35 | 983 | if (length) { |
1da177e4 | 984 | int next = laarr[start].extLocation.logicalBlockNum + |
28de7948 | 985 | (((laarr[start].extLength & UDF_EXTENT_LENGTH_MASK) + |
4b11111a MS |
986 | inode->i_sb->s_blocksize - 1) >> |
987 | inode->i_sb->s_blocksize_bits); | |
1da177e4 | 988 | int numalloc = udf_prealloc_blocks(inode->i_sb, inode, |
4b11111a MS |
989 | laarr[start].extLocation.partitionReferenceNum, |
990 | next, (UDF_DEFAULT_PREALLOC_BLOCKS > length ? | |
991 | length : UDF_DEFAULT_PREALLOC_BLOCKS) - | |
992 | currlength); | |
28de7948 | 993 | if (numalloc) { |
4b11111a | 994 | if (start == (c + 1)) |
1da177e4 | 995 | laarr[start].extLength += |
4b11111a MS |
996 | (numalloc << |
997 | inode->i_sb->s_blocksize_bits); | |
998 | else { | |
cb00ea35 | 999 | memmove(&laarr[c + 2], &laarr[c + 1], |
5ca4e4be | 1000 | sizeof(struct long_ad) * (*endnum - (c + 1))); |
cb00ea35 CG |
1001 | (*endnum)++; |
1002 | laarr[c + 1].extLocation.logicalBlockNum = next; | |
1003 | laarr[c + 1].extLocation.partitionReferenceNum = | |
4b11111a MS |
1004 | laarr[c].extLocation. |
1005 | partitionReferenceNum; | |
1006 | laarr[c + 1].extLength = | |
1007 | EXT_NOT_RECORDED_ALLOCATED | | |
1008 | (numalloc << | |
1009 | inode->i_sb->s_blocksize_bits); | |
cb00ea35 | 1010 | start = c + 1; |
1da177e4 LT |
1011 | } |
1012 | ||
cb00ea35 | 1013 | for (i = start + 1; numalloc && i < *endnum; i++) { |
4b11111a MS |
1014 | int elen = ((laarr[i].extLength & |
1015 | UDF_EXTENT_LENGTH_MASK) + | |
1016 | inode->i_sb->s_blocksize - 1) >> | |
1017 | inode->i_sb->s_blocksize_bits; | |
1da177e4 | 1018 | |
cb00ea35 | 1019 | if (elen > numalloc) { |
1da177e4 | 1020 | laarr[i].extLength -= |
4b11111a MS |
1021 | (numalloc << |
1022 | inode->i_sb->s_blocksize_bits); | |
1da177e4 | 1023 | numalloc = 0; |
cb00ea35 | 1024 | } else { |
1da177e4 | 1025 | numalloc -= elen; |
cb00ea35 | 1026 | if (*endnum > (i + 1)) |
4b11111a MS |
1027 | memmove(&laarr[i], |
1028 | &laarr[i + 1], | |
5ca4e4be | 1029 | sizeof(struct long_ad) * |
4b11111a | 1030 | (*endnum - (i + 1))); |
cb00ea35 CG |
1031 | i--; |
1032 | (*endnum)--; | |
1da177e4 LT |
1033 | } |
1034 | } | |
c0b34438 | 1035 | UDF_I(inode)->i_lenExtents += |
4b11111a | 1036 | numalloc << inode->i_sb->s_blocksize_bits; |
1da177e4 LT |
1037 | } |
1038 | } | |
1039 | } | |
1040 | ||
3cc6f844 | 1041 | static void udf_merge_extents(struct inode *inode, struct kernel_long_ad *laarr, |
cb00ea35 | 1042 | int *endnum) |
1da177e4 LT |
1043 | { |
1044 | int i; | |
4b11111a MS |
1045 | unsigned long blocksize = inode->i_sb->s_blocksize; |
1046 | unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; | |
1da177e4 | 1047 | |
cb00ea35 | 1048 | for (i = 0; i < (*endnum - 1); i++) { |
5ca4e4be PE |
1049 | struct kernel_long_ad *li /*l[i]*/ = &laarr[i]; |
1050 | struct kernel_long_ad *lip1 /*l[i plus 1]*/ = &laarr[i + 1]; | |
4b11111a MS |
1051 | |
1052 | if (((li->extLength >> 30) == (lip1->extLength >> 30)) && | |
1053 | (((li->extLength >> 30) == | |
1054 | (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) || | |
1055 | ((lip1->extLocation.logicalBlockNum - | |
1056 | li->extLocation.logicalBlockNum) == | |
1057 | (((li->extLength & UDF_EXTENT_LENGTH_MASK) + | |
1058 | blocksize - 1) >> blocksize_bits)))) { | |
1059 | ||
1060 | if (((li->extLength & UDF_EXTENT_LENGTH_MASK) + | |
1061 | (lip1->extLength & UDF_EXTENT_LENGTH_MASK) + | |
1062 | blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) { | |
1063 | lip1->extLength = (lip1->extLength - | |
1064 | (li->extLength & | |
1065 | UDF_EXTENT_LENGTH_MASK) + | |
1066 | UDF_EXTENT_LENGTH_MASK) & | |
1067 | ~(blocksize - 1); | |
1068 | li->extLength = (li->extLength & | |
1069 | UDF_EXTENT_FLAG_MASK) + | |
1070 | (UDF_EXTENT_LENGTH_MASK + 1) - | |
1071 | blocksize; | |
1072 | lip1->extLocation.logicalBlockNum = | |
1073 | li->extLocation.logicalBlockNum + | |
1074 | ((li->extLength & | |
1075 | UDF_EXTENT_LENGTH_MASK) >> | |
1076 | blocksize_bits); | |
1077 | } else { | |
1078 | li->extLength = lip1->extLength + | |
1079 | (((li->extLength & | |
1080 | UDF_EXTENT_LENGTH_MASK) + | |
1081 | blocksize - 1) & ~(blocksize - 1)); | |
1082 | if (*endnum > (i + 2)) | |
1083 | memmove(&laarr[i + 1], &laarr[i + 2], | |
5ca4e4be | 1084 | sizeof(struct long_ad) * |
4b11111a MS |
1085 | (*endnum - (i + 2))); |
1086 | i--; | |
1087 | (*endnum)--; | |
1da177e4 | 1088 | } |
4b11111a MS |
1089 | } else if (((li->extLength >> 30) == |
1090 | (EXT_NOT_RECORDED_ALLOCATED >> 30)) && | |
1091 | ((lip1->extLength >> 30) == | |
1092 | (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))) { | |
97e961fd | 1093 | udf_free_blocks(inode->i_sb, inode, &li->extLocation, 0, |
4b11111a MS |
1094 | ((li->extLength & |
1095 | UDF_EXTENT_LENGTH_MASK) + | |
1096 | blocksize - 1) >> blocksize_bits); | |
1097 | li->extLocation.logicalBlockNum = 0; | |
1098 | li->extLocation.partitionReferenceNum = 0; | |
1099 | ||
1100 | if (((li->extLength & UDF_EXTENT_LENGTH_MASK) + | |
1101 | (lip1->extLength & UDF_EXTENT_LENGTH_MASK) + | |
1102 | blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) { | |
1103 | lip1->extLength = (lip1->extLength - | |
1104 | (li->extLength & | |
1105 | UDF_EXTENT_LENGTH_MASK) + | |
1106 | UDF_EXTENT_LENGTH_MASK) & | |
1107 | ~(blocksize - 1); | |
1108 | li->extLength = (li->extLength & | |
1109 | UDF_EXTENT_FLAG_MASK) + | |
1110 | (UDF_EXTENT_LENGTH_MASK + 1) - | |
1111 | blocksize; | |
cb00ea35 | 1112 | } else { |
4b11111a MS |
1113 | li->extLength = lip1->extLength + |
1114 | (((li->extLength & | |
1115 | UDF_EXTENT_LENGTH_MASK) + | |
1116 | blocksize - 1) & ~(blocksize - 1)); | |
cb00ea35 CG |
1117 | if (*endnum > (i + 2)) |
1118 | memmove(&laarr[i + 1], &laarr[i + 2], | |
5ca4e4be | 1119 | sizeof(struct long_ad) * |
4b11111a | 1120 | (*endnum - (i + 2))); |
cb00ea35 CG |
1121 | i--; |
1122 | (*endnum)--; | |
1da177e4 | 1123 | } |
4b11111a MS |
1124 | } else if ((li->extLength >> 30) == |
1125 | (EXT_NOT_RECORDED_ALLOCATED >> 30)) { | |
1126 | udf_free_blocks(inode->i_sb, inode, | |
97e961fd | 1127 | &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 | li->extLength = (li->extLength & | |
1134 | UDF_EXTENT_LENGTH_MASK) | | |
1135 | EXT_NOT_RECORDED_NOT_ALLOCATED; | |
1da177e4 LT |
1136 | } |
1137 | } | |
1138 | } | |
1139 | ||
3cc6f844 | 1140 | static void udf_update_extents(struct inode *inode, struct kernel_long_ad *laarr, |
cb00ea35 CG |
1141 | int startnum, int endnum, |
1142 | struct extent_position *epos) | |
1da177e4 LT |
1143 | { |
1144 | int start = 0, i; | |
5ca4e4be | 1145 | struct kernel_lb_addr tmploc; |
1da177e4 LT |
1146 | uint32_t tmplen; |
1147 | ||
cb00ea35 CG |
1148 | if (startnum > endnum) { |
1149 | for (i = 0; i < (startnum - endnum); i++) | |
ff116fc8 | 1150 | udf_delete_aext(inode, *epos, laarr[i].extLocation, |
cb00ea35 CG |
1151 | laarr[i].extLength); |
1152 | } else if (startnum < endnum) { | |
1153 | for (i = 0; i < (endnum - startnum); i++) { | |
ff116fc8 | 1154 | udf_insert_aext(inode, *epos, laarr[i].extLocation, |
cb00ea35 | 1155 | laarr[i].extLength); |
ff116fc8 | 1156 | udf_next_aext(inode, epos, &laarr[i].extLocation, |
cb00ea35 CG |
1157 | &laarr[i].extLength, 1); |
1158 | start++; | |
1da177e4 LT |
1159 | } |
1160 | } | |
1161 | ||
cb00ea35 | 1162 | for (i = start; i < endnum; i++) { |
ff116fc8 | 1163 | udf_next_aext(inode, epos, &tmploc, &tmplen, 0); |
97e961fd | 1164 | udf_write_aext(inode, epos, &laarr[i].extLocation, |
cb00ea35 | 1165 | laarr[i].extLength, 1); |
1da177e4 LT |
1166 | } |
1167 | } | |
1168 | ||
cb00ea35 CG |
1169 | struct buffer_head *udf_bread(struct inode *inode, int block, |
1170 | int create, int *err) | |
1da177e4 | 1171 | { |
cb00ea35 | 1172 | struct buffer_head *bh = NULL; |
1da177e4 LT |
1173 | |
1174 | bh = udf_getblk(inode, block, create, err); | |
1175 | if (!bh) | |
1176 | return NULL; | |
1177 | ||
1178 | if (buffer_uptodate(bh)) | |
1179 | return bh; | |
28de7948 | 1180 | |
dfec8a14 | 1181 | ll_rw_block(REQ_OP_READ, 0, 1, &bh); |
28de7948 | 1182 | |
1da177e4 LT |
1183 | wait_on_buffer(bh); |
1184 | if (buffer_uptodate(bh)) | |
1185 | return bh; | |
28de7948 | 1186 | |
1da177e4 LT |
1187 | brelse(bh); |
1188 | *err = -EIO; | |
1189 | return NULL; | |
1190 | } | |
1191 | ||
7e49b6f2 | 1192 | int udf_setsize(struct inode *inode, loff_t newsize) |
1da177e4 | 1193 | { |
1da177e4 | 1194 | int err; |
48d6d8ff | 1195 | struct udf_inode_info *iinfo; |
7e49b6f2 | 1196 | int bsize = 1 << inode->i_blkbits; |
1da177e4 LT |
1197 | |
1198 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || | |
cb00ea35 | 1199 | S_ISLNK(inode->i_mode))) |
7e49b6f2 | 1200 | return -EINVAL; |
1da177e4 | 1201 | if (IS_APPEND(inode) || IS_IMMUTABLE(inode)) |
7e49b6f2 | 1202 | return -EPERM; |
1da177e4 | 1203 | |
48d6d8ff | 1204 | iinfo = UDF_I(inode); |
7e49b6f2 | 1205 | if (newsize > inode->i_size) { |
4d0fb621 | 1206 | down_write(&iinfo->i_data_sem); |
7e49b6f2 JK |
1207 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { |
1208 | if (bsize < | |
1209 | (udf_file_entry_alloc_offset(inode) + newsize)) { | |
1210 | err = udf_expand_file_adinicb(inode); | |
d2eb8c35 | 1211 | if (err) |
7e49b6f2 | 1212 | return err; |
d2eb8c35 | 1213 | down_write(&iinfo->i_data_sem); |
bb2b6d19 | 1214 | } else { |
7e49b6f2 | 1215 | iinfo->i_lenAlloc = newsize; |
bb2b6d19 IA |
1216 | goto set_size; |
1217 | } | |
7e49b6f2 JK |
1218 | } |
1219 | err = udf_extend_file(inode, newsize); | |
1220 | if (err) { | |
1221 | up_write(&iinfo->i_data_sem); | |
1222 | return err; | |
1da177e4 | 1223 | } |
bb2b6d19 | 1224 | set_size: |
7e49b6f2 | 1225 | truncate_setsize(inode, newsize); |
4d0fb621 | 1226 | up_write(&iinfo->i_data_sem); |
cb00ea35 | 1227 | } else { |
7e49b6f2 JK |
1228 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { |
1229 | down_write(&iinfo->i_data_sem); | |
99600051 | 1230 | udf_clear_extent_cache(inode); |
7e49b6f2 JK |
1231 | memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr + newsize, |
1232 | 0x00, bsize - newsize - | |
1233 | udf_file_entry_alloc_offset(inode)); | |
1234 | iinfo->i_lenAlloc = newsize; | |
1235 | truncate_setsize(inode, newsize); | |
1236 | up_write(&iinfo->i_data_sem); | |
1237 | goto update_time; | |
1238 | } | |
1239 | err = block_truncate_page(inode->i_mapping, newsize, | |
1240 | udf_get_block); | |
1241 | if (err) | |
1242 | return err; | |
4d0fb621 | 1243 | down_write(&iinfo->i_data_sem); |
99600051 | 1244 | udf_clear_extent_cache(inode); |
7e49b6f2 | 1245 | truncate_setsize(inode, newsize); |
1da177e4 | 1246 | udf_truncate_extents(inode); |
4d0fb621 | 1247 | up_write(&iinfo->i_data_sem); |
647bd61a | 1248 | } |
7e49b6f2 | 1249 | update_time: |
c2050a45 | 1250 | inode->i_mtime = inode->i_ctime = current_time(inode); |
1da177e4 | 1251 | if (IS_SYNC(inode)) |
cb00ea35 | 1252 | udf_sync_inode(inode); |
1da177e4 LT |
1253 | else |
1254 | mark_inode_dirty(inode); | |
7e49b6f2 | 1255 | return 0; |
1da177e4 LT |
1256 | } |
1257 | ||
c03aa9f6 JK |
1258 | /* |
1259 | * Maximum length of linked list formed by ICB hierarchy. The chosen number is | |
1260 | * arbitrary - just that we hopefully don't limit any real use of rewritten | |
1261 | * inode on write-once media but avoid looping for too long on corrupted media. | |
1262 | */ | |
1263 | #define UDF_MAX_ICB_NESTING 1024 | |
1264 | ||
6174c2eb | 1265 | static int udf_read_inode(struct inode *inode, bool hidden_inode) |
1da177e4 LT |
1266 | { |
1267 | struct buffer_head *bh = NULL; | |
1268 | struct fileEntry *fe; | |
bb7720a0 | 1269 | struct extendedFileEntry *efe; |
1da177e4 | 1270 | uint16_t ident; |
48d6d8ff | 1271 | struct udf_inode_info *iinfo = UDF_I(inode); |
bb7720a0 | 1272 | struct udf_sb_info *sbi = UDF_SB(inode->i_sb); |
6d3d5e86 | 1273 | struct kernel_lb_addr *iloc = &iinfo->i_location; |
bb7720a0 | 1274 | unsigned int link_count; |
c03aa9f6 | 1275 | unsigned int indirections = 0; |
79144954 | 1276 | int bs = inode->i_sb->s_blocksize; |
6d3d5e86 | 1277 | int ret = -EIO; |
1da177e4 | 1278 | |
c03aa9f6 | 1279 | reread: |
6d3d5e86 JK |
1280 | if (iloc->logicalBlockNum >= |
1281 | sbi->s_partmaps[iloc->partitionReferenceNum].s_partition_len) { | |
1282 | udf_debug("block=%d, partition=%d out of range\n", | |
1283 | iloc->logicalBlockNum, iloc->partitionReferenceNum); | |
1284 | return -EIO; | |
1285 | } | |
1286 | ||
1da177e4 LT |
1287 | /* |
1288 | * Set defaults, but the inode is still incomplete! | |
1289 | * Note: get_new_inode() sets the following on a new inode: | |
1290 | * i_sb = sb | |
1291 | * i_no = ino | |
1292 | * i_flags = sb->s_flags | |
1293 | * i_state = 0 | |
1294 | * clean_inode(): zero fills and sets | |
1295 | * i_count = 1 | |
1296 | * i_nlink = 1 | |
1297 | * i_op = NULL; | |
1298 | */ | |
6d3d5e86 | 1299 | bh = udf_read_ptagged(inode->i_sb, iloc, 0, &ident); |
cb00ea35 | 1300 | if (!bh) { |
78ace70c | 1301 | udf_err(inode->i_sb, "(ino %ld) failed !bh\n", inode->i_ino); |
6d3d5e86 | 1302 | return -EIO; |
1da177e4 LT |
1303 | } |
1304 | ||
1305 | if (ident != TAG_IDENT_FE && ident != TAG_IDENT_EFE && | |
cb00ea35 | 1306 | ident != TAG_IDENT_USE) { |
78ace70c JP |
1307 | udf_err(inode->i_sb, "(ino %ld) failed ident=%d\n", |
1308 | inode->i_ino, ident); | |
6d3d5e86 | 1309 | goto out; |
1da177e4 LT |
1310 | } |
1311 | ||
1312 | fe = (struct fileEntry *)bh->b_data; | |
bb7720a0 | 1313 | efe = (struct extendedFileEntry *)bh->b_data; |
1da177e4 | 1314 | |
5e0f0017 | 1315 | if (fe->icbTag.strategyType == cpu_to_le16(4096)) { |
1ab92785 | 1316 | struct buffer_head *ibh; |
1da177e4 | 1317 | |
6d3d5e86 | 1318 | ibh = udf_read_ptagged(inode->i_sb, iloc, 1, &ident); |
1ab92785 | 1319 | if (ident == TAG_IDENT_IE && ibh) { |
5ca4e4be | 1320 | struct kernel_lb_addr loc; |
1ab92785 | 1321 | struct indirectEntry *ie; |
1322 | ||
1323 | ie = (struct indirectEntry *)ibh->b_data; | |
1324 | loc = lelb_to_cpu(ie->indirectICB.extLocation); | |
1325 | ||
c03aa9f6 | 1326 | if (ie->indirectICB.extLength) { |
c03aa9f6 JK |
1327 | brelse(ibh); |
1328 | memcpy(&iinfo->i_location, &loc, | |
1329 | sizeof(struct kernel_lb_addr)); | |
1330 | if (++indirections > UDF_MAX_ICB_NESTING) { | |
1331 | udf_err(inode->i_sb, | |
1332 | "too many ICBs in ICB hierarchy" | |
1333 | " (max %d supported)\n", | |
1334 | UDF_MAX_ICB_NESTING); | |
6d3d5e86 | 1335 | goto out; |
28de7948 | 1336 | } |
6d3d5e86 | 1337 | brelse(bh); |
c03aa9f6 | 1338 | goto reread; |
1da177e4 | 1339 | } |
28de7948 | 1340 | } |
1ab92785 | 1341 | brelse(ibh); |
5e0f0017 | 1342 | } else if (fe->icbTag.strategyType != cpu_to_le16(4)) { |
78ace70c JP |
1343 | udf_err(inode->i_sb, "unsupported strategy type: %d\n", |
1344 | le16_to_cpu(fe->icbTag.strategyType)); | |
6d3d5e86 | 1345 | goto out; |
1da177e4 | 1346 | } |
5e0f0017 | 1347 | if (fe->icbTag.strategyType == cpu_to_le16(4)) |
48d6d8ff | 1348 | iinfo->i_strat4096 = 0; |
5e0f0017 | 1349 | else /* if (fe->icbTag.strategyType == cpu_to_le16(4096)) */ |
48d6d8ff | 1350 | iinfo->i_strat4096 = 1; |
1da177e4 | 1351 | |
48d6d8ff | 1352 | iinfo->i_alloc_type = le16_to_cpu(fe->icbTag.flags) & |
4b11111a | 1353 | ICBTAG_FLAG_AD_MASK; |
48d6d8ff MS |
1354 | iinfo->i_unique = 0; |
1355 | iinfo->i_lenEAttr = 0; | |
1356 | iinfo->i_lenExtents = 0; | |
1357 | iinfo->i_lenAlloc = 0; | |
1358 | iinfo->i_next_alloc_block = 0; | |
1359 | iinfo->i_next_alloc_goal = 0; | |
5e0f0017 | 1360 | if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_EFE)) { |
48d6d8ff MS |
1361 | iinfo->i_efe = 1; |
1362 | iinfo->i_use = 0; | |
79144954 | 1363 | ret = udf_alloc_i_data(inode, bs - |
6d3d5e86 JK |
1364 | sizeof(struct extendedFileEntry)); |
1365 | if (ret) | |
1366 | goto out; | |
48d6d8ff | 1367 | memcpy(iinfo->i_ext.i_data, |
4b11111a | 1368 | bh->b_data + sizeof(struct extendedFileEntry), |
79144954 | 1369 | bs - sizeof(struct extendedFileEntry)); |
5e0f0017 | 1370 | } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_FE)) { |
48d6d8ff MS |
1371 | iinfo->i_efe = 0; |
1372 | iinfo->i_use = 0; | |
79144954 | 1373 | ret = udf_alloc_i_data(inode, bs - sizeof(struct fileEntry)); |
6d3d5e86 JK |
1374 | if (ret) |
1375 | goto out; | |
48d6d8ff | 1376 | memcpy(iinfo->i_ext.i_data, |
c0b34438 | 1377 | bh->b_data + sizeof(struct fileEntry), |
79144954 | 1378 | bs - sizeof(struct fileEntry)); |
5e0f0017 | 1379 | } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_USE)) { |
48d6d8ff MS |
1380 | iinfo->i_efe = 0; |
1381 | iinfo->i_use = 1; | |
1382 | iinfo->i_lenAlloc = le32_to_cpu( | |
4b11111a MS |
1383 | ((struct unallocSpaceEntry *)bh->b_data)-> |
1384 | lengthAllocDescs); | |
79144954 | 1385 | ret = udf_alloc_i_data(inode, bs - |
6d3d5e86 JK |
1386 | sizeof(struct unallocSpaceEntry)); |
1387 | if (ret) | |
1388 | goto out; | |
48d6d8ff | 1389 | memcpy(iinfo->i_ext.i_data, |
4b11111a | 1390 | bh->b_data + sizeof(struct unallocSpaceEntry), |
79144954 | 1391 | bs - sizeof(struct unallocSpaceEntry)); |
6d3d5e86 | 1392 | return 0; |
1da177e4 LT |
1393 | } |
1394 | ||
6d3d5e86 | 1395 | ret = -EIO; |
c03cad24 | 1396 | read_lock(&sbi->s_cred_lock); |
c2ba138a EB |
1397 | i_uid_write(inode, le32_to_cpu(fe->uid)); |
1398 | if (!uid_valid(inode->i_uid) || | |
ca76d2d8 CG |
1399 | UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_IGNORE) || |
1400 | UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_SET)) | |
4d6660eb | 1401 | inode->i_uid = UDF_SB(inode->i_sb)->s_uid; |
1da177e4 | 1402 | |
c2ba138a EB |
1403 | i_gid_write(inode, le32_to_cpu(fe->gid)); |
1404 | if (!gid_valid(inode->i_gid) || | |
ca76d2d8 CG |
1405 | UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_IGNORE) || |
1406 | UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_SET)) | |
4d6660eb | 1407 | inode->i_gid = UDF_SB(inode->i_sb)->s_gid; |
1da177e4 | 1408 | |
7ac9bcd5 | 1409 | if (fe->icbTag.fileType != ICBTAG_FILE_TYPE_DIRECTORY && |
87bc730c | 1410 | sbi->s_fmode != UDF_INVALID_MODE) |
7ac9bcd5 MS |
1411 | inode->i_mode = sbi->s_fmode; |
1412 | else if (fe->icbTag.fileType == ICBTAG_FILE_TYPE_DIRECTORY && | |
87bc730c | 1413 | sbi->s_dmode != UDF_INVALID_MODE) |
7ac9bcd5 MS |
1414 | inode->i_mode = sbi->s_dmode; |
1415 | else | |
1416 | inode->i_mode = udf_convert_permissions(fe); | |
1417 | inode->i_mode &= ~sbi->s_umask; | |
c03cad24 JK |
1418 | read_unlock(&sbi->s_cred_lock); |
1419 | ||
bfe86848 | 1420 | link_count = le16_to_cpu(fe->fileLinkCount); |
4071b913 | 1421 | if (!link_count) { |
6174c2eb JK |
1422 | if (!hidden_inode) { |
1423 | ret = -ESTALE; | |
1424 | goto out; | |
1425 | } | |
1426 | link_count = 1; | |
4071b913 | 1427 | } |
bfe86848 | 1428 | set_nlink(inode, link_count); |
c03cad24 JK |
1429 | |
1430 | inode->i_size = le64_to_cpu(fe->informationLength); | |
1431 | iinfo->i_lenExtents = inode->i_size; | |
1da177e4 | 1432 | |
48d6d8ff | 1433 | if (iinfo->i_efe == 0) { |
1da177e4 | 1434 | inode->i_blocks = le64_to_cpu(fe->logicalBlocksRecorded) << |
28de7948 | 1435 | (inode->i_sb->s_blocksize_bits - 9); |
1da177e4 | 1436 | |
56774805 | 1437 | if (!udf_disk_stamp_to_time(&inode->i_atime, fe->accessTime)) |
cbf5676a | 1438 | inode->i_atime = sbi->s_record_time; |
1439 | ||
56774805 MS |
1440 | if (!udf_disk_stamp_to_time(&inode->i_mtime, |
1441 | fe->modificationTime)) | |
cbf5676a | 1442 | inode->i_mtime = sbi->s_record_time; |
1443 | ||
56774805 | 1444 | if (!udf_disk_stamp_to_time(&inode->i_ctime, fe->attrTime)) |
cbf5676a | 1445 | inode->i_ctime = sbi->s_record_time; |
1da177e4 | 1446 | |
48d6d8ff MS |
1447 | iinfo->i_unique = le64_to_cpu(fe->uniqueID); |
1448 | iinfo->i_lenEAttr = le32_to_cpu(fe->lengthExtendedAttr); | |
1449 | iinfo->i_lenAlloc = le32_to_cpu(fe->lengthAllocDescs); | |
d5e2cf07 | 1450 | iinfo->i_checkpoint = le32_to_cpu(fe->checkpoint); |
cb00ea35 | 1451 | } else { |
647bd61a | 1452 | inode->i_blocks = le64_to_cpu(efe->logicalBlocksRecorded) << |
cb00ea35 | 1453 | (inode->i_sb->s_blocksize_bits - 9); |
1da177e4 | 1454 | |
56774805 | 1455 | if (!udf_disk_stamp_to_time(&inode->i_atime, efe->accessTime)) |
cbf5676a | 1456 | inode->i_atime = sbi->s_record_time; |
1457 | ||
56774805 MS |
1458 | if (!udf_disk_stamp_to_time(&inode->i_mtime, |
1459 | efe->modificationTime)) | |
cbf5676a | 1460 | inode->i_mtime = sbi->s_record_time; |
1461 | ||
56774805 | 1462 | if (!udf_disk_stamp_to_time(&iinfo->i_crtime, efe->createTime)) |
cbf5676a | 1463 | iinfo->i_crtime = sbi->s_record_time; |
1464 | ||
56774805 | 1465 | if (!udf_disk_stamp_to_time(&inode->i_ctime, efe->attrTime)) |
cbf5676a | 1466 | inode->i_ctime = sbi->s_record_time; |
1da177e4 | 1467 | |
48d6d8ff MS |
1468 | iinfo->i_unique = le64_to_cpu(efe->uniqueID); |
1469 | iinfo->i_lenEAttr = le32_to_cpu(efe->lengthExtendedAttr); | |
1470 | iinfo->i_lenAlloc = le32_to_cpu(efe->lengthAllocDescs); | |
d5e2cf07 | 1471 | iinfo->i_checkpoint = le32_to_cpu(efe->checkpoint); |
1da177e4 | 1472 | } |
470cca56 | 1473 | inode->i_generation = iinfo->i_unique; |
1da177e4 | 1474 | |
23b133bd JK |
1475 | /* |
1476 | * Sanity check length of allocation descriptors and extended attrs to | |
1477 | * avoid integer overflows | |
1478 | */ | |
1479 | if (iinfo->i_lenEAttr > bs || iinfo->i_lenAlloc > bs) | |
1480 | goto out; | |
1481 | /* Now do exact checks */ | |
1482 | if (udf_file_entry_alloc_offset(inode) + iinfo->i_lenAlloc > bs) | |
1483 | goto out; | |
e159332b JK |
1484 | /* Sanity checks for files in ICB so that we don't get confused later */ |
1485 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { | |
1486 | /* | |
1487 | * For file in ICB data is stored in allocation descriptor | |
1488 | * so sizes should match | |
1489 | */ | |
1490 | if (iinfo->i_lenAlloc != inode->i_size) | |
1491 | goto out; | |
1492 | /* File in ICB has to fit in there... */ | |
79144954 | 1493 | if (inode->i_size > bs - udf_file_entry_alloc_offset(inode)) |
e159332b JK |
1494 | goto out; |
1495 | } | |
1496 | ||
cb00ea35 CG |
1497 | switch (fe->icbTag.fileType) { |
1498 | case ICBTAG_FILE_TYPE_DIRECTORY: | |
28de7948 CG |
1499 | inode->i_op = &udf_dir_inode_operations; |
1500 | inode->i_fop = &udf_dir_operations; | |
1501 | inode->i_mode |= S_IFDIR; | |
1502 | inc_nlink(inode); | |
1503 | break; | |
cb00ea35 CG |
1504 | case ICBTAG_FILE_TYPE_REALTIME: |
1505 | case ICBTAG_FILE_TYPE_REGULAR: | |
1506 | case ICBTAG_FILE_TYPE_UNDEF: | |
742e1795 | 1507 | case ICBTAG_FILE_TYPE_VAT20: |
48d6d8ff | 1508 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
28de7948 CG |
1509 | inode->i_data.a_ops = &udf_adinicb_aops; |
1510 | else | |
1511 | inode->i_data.a_ops = &udf_aops; | |
1512 | inode->i_op = &udf_file_inode_operations; | |
1513 | inode->i_fop = &udf_file_operations; | |
1514 | inode->i_mode |= S_IFREG; | |
1515 | break; | |
cb00ea35 | 1516 | case ICBTAG_FILE_TYPE_BLOCK: |
28de7948 CG |
1517 | inode->i_mode |= S_IFBLK; |
1518 | break; | |
cb00ea35 | 1519 | case ICBTAG_FILE_TYPE_CHAR: |
28de7948 CG |
1520 | inode->i_mode |= S_IFCHR; |
1521 | break; | |
cb00ea35 | 1522 | case ICBTAG_FILE_TYPE_FIFO: |
28de7948 CG |
1523 | init_special_inode(inode, inode->i_mode | S_IFIFO, 0); |
1524 | break; | |
cb00ea35 | 1525 | case ICBTAG_FILE_TYPE_SOCKET: |
28de7948 CG |
1526 | init_special_inode(inode, inode->i_mode | S_IFSOCK, 0); |
1527 | break; | |
cb00ea35 | 1528 | case ICBTAG_FILE_TYPE_SYMLINK: |
28de7948 | 1529 | inode->i_data.a_ops = &udf_symlink_aops; |
ad4d0532 | 1530 | inode->i_op = &udf_symlink_inode_operations; |
21fc61c7 | 1531 | inode_nohighmem(inode); |
28de7948 CG |
1532 | inode->i_mode = S_IFLNK | S_IRWXUGO; |
1533 | break; | |
bfb257a5 JK |
1534 | case ICBTAG_FILE_TYPE_MAIN: |
1535 | udf_debug("METADATA FILE-----\n"); | |
1536 | break; | |
1537 | case ICBTAG_FILE_TYPE_MIRROR: | |
1538 | udf_debug("METADATA MIRROR FILE-----\n"); | |
1539 | break; | |
1540 | case ICBTAG_FILE_TYPE_BITMAP: | |
1541 | udf_debug("METADATA BITMAP FILE-----\n"); | |
1542 | break; | |
cb00ea35 | 1543 | default: |
78ace70c JP |
1544 | udf_err(inode->i_sb, "(ino %ld) failed unknown file type=%d\n", |
1545 | inode->i_ino, fe->icbTag.fileType); | |
6d3d5e86 | 1546 | goto out; |
1da177e4 | 1547 | } |
cb00ea35 | 1548 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { |
4b11111a MS |
1549 | struct deviceSpec *dsea = |
1550 | (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1); | |
cb00ea35 CG |
1551 | if (dsea) { |
1552 | init_special_inode(inode, inode->i_mode, | |
4b11111a MS |
1553 | MKDEV(le32_to_cpu(dsea->majorDeviceIdent), |
1554 | le32_to_cpu(dsea->minorDeviceIdent))); | |
1da177e4 | 1555 | /* Developer ID ??? */ |
4b11111a | 1556 | } else |
6d3d5e86 | 1557 | goto out; |
1da177e4 | 1558 | } |
6d3d5e86 JK |
1559 | ret = 0; |
1560 | out: | |
bb7720a0 | 1561 | brelse(bh); |
6d3d5e86 | 1562 | return ret; |
1da177e4 LT |
1563 | } |
1564 | ||
647bd61a CG |
1565 | static int udf_alloc_i_data(struct inode *inode, size_t size) |
1566 | { | |
48d6d8ff MS |
1567 | struct udf_inode_info *iinfo = UDF_I(inode); |
1568 | iinfo->i_ext.i_data = kmalloc(size, GFP_KERNEL); | |
647bd61a | 1569 | |
48d6d8ff | 1570 | if (!iinfo->i_ext.i_data) { |
78ace70c JP |
1571 | udf_err(inode->i_sb, "(ino %ld) no free memory\n", |
1572 | inode->i_ino); | |
647bd61a CG |
1573 | return -ENOMEM; |
1574 | } | |
1575 | ||
1576 | return 0; | |
1577 | } | |
1578 | ||
faa17292 | 1579 | static umode_t udf_convert_permissions(struct fileEntry *fe) |
1da177e4 | 1580 | { |
faa17292 | 1581 | umode_t mode; |
1da177e4 LT |
1582 | uint32_t permissions; |
1583 | uint32_t flags; | |
1584 | ||
1585 | permissions = le32_to_cpu(fe->permissions); | |
1586 | flags = le16_to_cpu(fe->icbTag.flags); | |
1587 | ||
4b11111a MS |
1588 | mode = ((permissions) & S_IRWXO) | |
1589 | ((permissions >> 2) & S_IRWXG) | | |
1590 | ((permissions >> 4) & S_IRWXU) | | |
1591 | ((flags & ICBTAG_FLAG_SETUID) ? S_ISUID : 0) | | |
1592 | ((flags & ICBTAG_FLAG_SETGID) ? S_ISGID : 0) | | |
1593 | ((flags & ICBTAG_FLAG_STICKY) ? S_ISVTX : 0); | |
1da177e4 LT |
1594 | |
1595 | return mode; | |
1596 | } | |
1597 | ||
a9185b41 | 1598 | int udf_write_inode(struct inode *inode, struct writeback_control *wbc) |
1da177e4 | 1599 | { |
49521de1 | 1600 | return udf_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL); |
1da177e4 LT |
1601 | } |
1602 | ||
49521de1 | 1603 | static int udf_sync_inode(struct inode *inode) |
1da177e4 LT |
1604 | { |
1605 | return udf_update_inode(inode, 1); | |
1606 | } | |
1607 | ||
7ed0fbd7 FF |
1608 | static void udf_adjust_time(struct udf_inode_info *iinfo, struct timespec time) |
1609 | { | |
1610 | if (iinfo->i_crtime.tv_sec > time.tv_sec || | |
1611 | (iinfo->i_crtime.tv_sec == time.tv_sec && | |
1612 | iinfo->i_crtime.tv_nsec > time.tv_nsec)) | |
1613 | iinfo->i_crtime = time; | |
1614 | } | |
1615 | ||
cb00ea35 | 1616 | static int udf_update_inode(struct inode *inode, int do_sync) |
1da177e4 LT |
1617 | { |
1618 | struct buffer_head *bh = NULL; | |
1619 | struct fileEntry *fe; | |
1620 | struct extendedFileEntry *efe; | |
b2527bfa | 1621 | uint64_t lb_recorded; |
1da177e4 LT |
1622 | uint32_t udfperms; |
1623 | uint16_t icbflags; | |
1624 | uint16_t crclen; | |
1da177e4 | 1625 | int err = 0; |
6c79e987 | 1626 | struct udf_sb_info *sbi = UDF_SB(inode->i_sb); |
4b11111a | 1627 | unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; |
48d6d8ff | 1628 | struct udf_inode_info *iinfo = UDF_I(inode); |
1da177e4 | 1629 | |
5833ded9 JK |
1630 | bh = udf_tgetblk(inode->i_sb, |
1631 | udf_get_lb_pblock(inode->i_sb, &iinfo->i_location, 0)); | |
cb00ea35 | 1632 | if (!bh) { |
aae917cd | 1633 | udf_debug("getblk failure\n"); |
0fd2ba36 | 1634 | return -EIO; |
1da177e4 LT |
1635 | } |
1636 | ||
aae917cd JK |
1637 | lock_buffer(bh); |
1638 | memset(bh->b_data, 0, inode->i_sb->s_blocksize); | |
1da177e4 LT |
1639 | fe = (struct fileEntry *)bh->b_data; |
1640 | efe = (struct extendedFileEntry *)bh->b_data; | |
1641 | ||
aae917cd | 1642 | if (iinfo->i_use) { |
1da177e4 | 1643 | struct unallocSpaceEntry *use = |
28de7948 | 1644 | (struct unallocSpaceEntry *)bh->b_data; |
1da177e4 | 1645 | |
48d6d8ff | 1646 | use->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc); |
4b11111a | 1647 | memcpy(bh->b_data + sizeof(struct unallocSpaceEntry), |
48d6d8ff | 1648 | iinfo->i_ext.i_data, inode->i_sb->s_blocksize - |
4b11111a | 1649 | sizeof(struct unallocSpaceEntry)); |
aae917cd | 1650 | use->descTag.tagIdent = cpu_to_le16(TAG_IDENT_USE); |
70f19f58 | 1651 | crclen = sizeof(struct unallocSpaceEntry); |
1da177e4 | 1652 | |
70f19f58 | 1653 | goto finish; |
1da177e4 LT |
1654 | } |
1655 | ||
4d6660eb PS |
1656 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_FORGET)) |
1657 | fe->uid = cpu_to_le32(-1); | |
cb00ea35 | 1658 | else |
c2ba138a | 1659 | fe->uid = cpu_to_le32(i_uid_read(inode)); |
1da177e4 | 1660 | |
4d6660eb PS |
1661 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_FORGET)) |
1662 | fe->gid = cpu_to_le32(-1); | |
cb00ea35 | 1663 | else |
c2ba138a | 1664 | fe->gid = cpu_to_le32(i_gid_read(inode)); |
1da177e4 | 1665 | |
4b11111a MS |
1666 | udfperms = ((inode->i_mode & S_IRWXO)) | |
1667 | ((inode->i_mode & S_IRWXG) << 2) | | |
1668 | ((inode->i_mode & S_IRWXU) << 4); | |
1da177e4 | 1669 | |
4b11111a MS |
1670 | udfperms |= (le32_to_cpu(fe->permissions) & |
1671 | (FE_PERM_O_DELETE | FE_PERM_O_CHATTR | | |
1672 | FE_PERM_G_DELETE | FE_PERM_G_CHATTR | | |
1673 | FE_PERM_U_DELETE | FE_PERM_U_CHATTR)); | |
1da177e4 LT |
1674 | fe->permissions = cpu_to_le32(udfperms); |
1675 | ||
8a70ee33 | 1676 | if (S_ISDIR(inode->i_mode) && inode->i_nlink > 0) |
1da177e4 LT |
1677 | fe->fileLinkCount = cpu_to_le16(inode->i_nlink - 1); |
1678 | else | |
1679 | fe->fileLinkCount = cpu_to_le16(inode->i_nlink); | |
1680 | ||
1681 | fe->informationLength = cpu_to_le64(inode->i_size); | |
1682 | ||
cb00ea35 | 1683 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { |
5ca4e4be | 1684 | struct regid *eid; |
28de7948 CG |
1685 | struct deviceSpec *dsea = |
1686 | (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1); | |
cb00ea35 | 1687 | if (!dsea) { |
1da177e4 | 1688 | dsea = (struct deviceSpec *) |
28de7948 CG |
1689 | udf_add_extendedattr(inode, |
1690 | sizeof(struct deviceSpec) + | |
5ca4e4be | 1691 | sizeof(struct regid), 12, 0x3); |
1da177e4 LT |
1692 | dsea->attrType = cpu_to_le32(12); |
1693 | dsea->attrSubtype = 1; | |
4b11111a MS |
1694 | dsea->attrLength = cpu_to_le32( |
1695 | sizeof(struct deviceSpec) + | |
5ca4e4be PE |
1696 | sizeof(struct regid)); |
1697 | dsea->impUseLength = cpu_to_le32(sizeof(struct regid)); | |
1da177e4 | 1698 | } |
5ca4e4be PE |
1699 | eid = (struct regid *)dsea->impUse; |
1700 | memset(eid, 0, sizeof(struct regid)); | |
1da177e4 LT |
1701 | strcpy(eid->ident, UDF_ID_DEVELOPER); |
1702 | eid->identSuffix[0] = UDF_OS_CLASS_UNIX; | |
1703 | eid->identSuffix[1] = UDF_OS_ID_LINUX; | |
1704 | dsea->majorDeviceIdent = cpu_to_le32(imajor(inode)); | |
1705 | dsea->minorDeviceIdent = cpu_to_le32(iminor(inode)); | |
1706 | } | |
1707 | ||
b2527bfa SN |
1708 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
1709 | lb_recorded = 0; /* No extents => no blocks! */ | |
1710 | else | |
1711 | lb_recorded = | |
1712 | (inode->i_blocks + (1 << (blocksize_bits - 9)) - 1) >> | |
1713 | (blocksize_bits - 9); | |
1714 | ||
48d6d8ff | 1715 | if (iinfo->i_efe == 0) { |
c0b34438 | 1716 | memcpy(bh->b_data + sizeof(struct fileEntry), |
48d6d8ff | 1717 | iinfo->i_ext.i_data, |
cb00ea35 | 1718 | inode->i_sb->s_blocksize - sizeof(struct fileEntry)); |
b2527bfa | 1719 | fe->logicalBlocksRecorded = cpu_to_le64(lb_recorded); |
1da177e4 | 1720 | |
56774805 MS |
1721 | udf_time_to_disk_stamp(&fe->accessTime, inode->i_atime); |
1722 | udf_time_to_disk_stamp(&fe->modificationTime, inode->i_mtime); | |
1723 | udf_time_to_disk_stamp(&fe->attrTime, inode->i_ctime); | |
5ca4e4be | 1724 | memset(&(fe->impIdent), 0, sizeof(struct regid)); |
1da177e4 LT |
1725 | strcpy(fe->impIdent.ident, UDF_ID_DEVELOPER); |
1726 | fe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; | |
1727 | fe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; | |
48d6d8ff MS |
1728 | fe->uniqueID = cpu_to_le64(iinfo->i_unique); |
1729 | fe->lengthExtendedAttr = cpu_to_le32(iinfo->i_lenEAttr); | |
1730 | fe->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc); | |
d5e2cf07 | 1731 | fe->checkpoint = cpu_to_le32(iinfo->i_checkpoint); |
1da177e4 LT |
1732 | fe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_FE); |
1733 | crclen = sizeof(struct fileEntry); | |
cb00ea35 | 1734 | } else { |
4b11111a | 1735 | memcpy(bh->b_data + sizeof(struct extendedFileEntry), |
48d6d8ff | 1736 | iinfo->i_ext.i_data, |
4b11111a MS |
1737 | inode->i_sb->s_blocksize - |
1738 | sizeof(struct extendedFileEntry)); | |
1da177e4 | 1739 | efe->objectSize = cpu_to_le64(inode->i_size); |
b2527bfa | 1740 | efe->logicalBlocksRecorded = cpu_to_le64(lb_recorded); |
1da177e4 | 1741 | |
7ed0fbd7 FF |
1742 | udf_adjust_time(iinfo, inode->i_atime); |
1743 | udf_adjust_time(iinfo, inode->i_mtime); | |
1744 | udf_adjust_time(iinfo, inode->i_ctime); | |
1da177e4 | 1745 | |
56774805 MS |
1746 | udf_time_to_disk_stamp(&efe->accessTime, inode->i_atime); |
1747 | udf_time_to_disk_stamp(&efe->modificationTime, inode->i_mtime); | |
1748 | udf_time_to_disk_stamp(&efe->createTime, iinfo->i_crtime); | |
1749 | udf_time_to_disk_stamp(&efe->attrTime, inode->i_ctime); | |
1da177e4 | 1750 | |
5ca4e4be | 1751 | memset(&(efe->impIdent), 0, sizeof(struct regid)); |
1da177e4 LT |
1752 | strcpy(efe->impIdent.ident, UDF_ID_DEVELOPER); |
1753 | efe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; | |
1754 | efe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; | |
48d6d8ff MS |
1755 | efe->uniqueID = cpu_to_le64(iinfo->i_unique); |
1756 | efe->lengthExtendedAttr = cpu_to_le32(iinfo->i_lenEAttr); | |
1757 | efe->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc); | |
d5e2cf07 | 1758 | efe->checkpoint = cpu_to_le32(iinfo->i_checkpoint); |
1da177e4 LT |
1759 | efe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_EFE); |
1760 | crclen = sizeof(struct extendedFileEntry); | |
1761 | } | |
70f19f58 SM |
1762 | |
1763 | finish: | |
48d6d8ff | 1764 | if (iinfo->i_strat4096) { |
1da177e4 LT |
1765 | fe->icbTag.strategyType = cpu_to_le16(4096); |
1766 | fe->icbTag.strategyParameter = cpu_to_le16(1); | |
1767 | fe->icbTag.numEntries = cpu_to_le16(2); | |
cb00ea35 | 1768 | } else { |
1da177e4 LT |
1769 | fe->icbTag.strategyType = cpu_to_le16(4); |
1770 | fe->icbTag.numEntries = cpu_to_le16(1); | |
1771 | } | |
1772 | ||
70f19f58 SM |
1773 | if (iinfo->i_use) |
1774 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_USE; | |
1775 | else if (S_ISDIR(inode->i_mode)) | |
1da177e4 LT |
1776 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_DIRECTORY; |
1777 | else if (S_ISREG(inode->i_mode)) | |
1778 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_REGULAR; | |
1779 | else if (S_ISLNK(inode->i_mode)) | |
1780 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_SYMLINK; | |
1781 | else if (S_ISBLK(inode->i_mode)) | |
1782 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_BLOCK; | |
1783 | else if (S_ISCHR(inode->i_mode)) | |
1784 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_CHAR; | |
1785 | else if (S_ISFIFO(inode->i_mode)) | |
1786 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_FIFO; | |
1787 | else if (S_ISSOCK(inode->i_mode)) | |
1788 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_SOCKET; | |
1789 | ||
48d6d8ff | 1790 | icbflags = iinfo->i_alloc_type | |
28de7948 CG |
1791 | ((inode->i_mode & S_ISUID) ? ICBTAG_FLAG_SETUID : 0) | |
1792 | ((inode->i_mode & S_ISGID) ? ICBTAG_FLAG_SETGID : 0) | | |
1793 | ((inode->i_mode & S_ISVTX) ? ICBTAG_FLAG_STICKY : 0) | | |
1794 | (le16_to_cpu(fe->icbTag.flags) & | |
1795 | ~(ICBTAG_FLAG_AD_MASK | ICBTAG_FLAG_SETUID | | |
1796 | ICBTAG_FLAG_SETGID | ICBTAG_FLAG_STICKY)); | |
1da177e4 LT |
1797 | |
1798 | fe->icbTag.flags = cpu_to_le16(icbflags); | |
6c79e987 | 1799 | if (sbi->s_udfrev >= 0x0200) |
1da177e4 LT |
1800 | fe->descTag.descVersion = cpu_to_le16(3); |
1801 | else | |
1802 | fe->descTag.descVersion = cpu_to_le16(2); | |
6c79e987 | 1803 | fe->descTag.tagSerialNum = cpu_to_le16(sbi->s_serial_number); |
4b11111a | 1804 | fe->descTag.tagLocation = cpu_to_le32( |
48d6d8ff | 1805 | iinfo->i_location.logicalBlockNum); |
aae917cd | 1806 | crclen += iinfo->i_lenEAttr + iinfo->i_lenAlloc - sizeof(struct tag); |
1da177e4 | 1807 | fe->descTag.descCRCLength = cpu_to_le16(crclen); |
5ca4e4be | 1808 | fe->descTag.descCRC = cpu_to_le16(crc_itu_t(0, (char *)fe + sizeof(struct tag), |
f845fced | 1809 | crclen)); |
3f2587bb | 1810 | fe->descTag.tagChecksum = udf_tag_checksum(&fe->descTag); |
1da177e4 | 1811 | |
5833ded9 | 1812 | set_buffer_uptodate(bh); |
aae917cd JK |
1813 | unlock_buffer(bh); |
1814 | ||
1da177e4 LT |
1815 | /* write the data blocks */ |
1816 | mark_buffer_dirty(bh); | |
cb00ea35 | 1817 | if (do_sync) { |
1da177e4 | 1818 | sync_dirty_buffer(bh); |
aae917cd | 1819 | if (buffer_write_io_error(bh)) { |
78ace70c JP |
1820 | udf_warn(inode->i_sb, "IO error syncing udf inode [%08lx]\n", |
1821 | inode->i_ino); | |
1da177e4 LT |
1822 | err = -EIO; |
1823 | } | |
1824 | } | |
3bf25cb4 | 1825 | brelse(bh); |
28de7948 | 1826 | |
1da177e4 LT |
1827 | return err; |
1828 | } | |
1829 | ||
6174c2eb JK |
1830 | struct inode *__udf_iget(struct super_block *sb, struct kernel_lb_addr *ino, |
1831 | bool hidden_inode) | |
1da177e4 LT |
1832 | { |
1833 | unsigned long block = udf_get_lb_pblock(sb, ino, 0); | |
1834 | struct inode *inode = iget_locked(sb, block); | |
6d3d5e86 | 1835 | int err; |
1da177e4 LT |
1836 | |
1837 | if (!inode) | |
6d3d5e86 | 1838 | return ERR_PTR(-ENOMEM); |
1da177e4 | 1839 | |
6d3d5e86 JK |
1840 | if (!(inode->i_state & I_NEW)) |
1841 | return inode; | |
1da177e4 | 1842 | |
6d3d5e86 | 1843 | memcpy(&UDF_I(inode)->i_location, ino, sizeof(struct kernel_lb_addr)); |
6174c2eb | 1844 | err = udf_read_inode(inode, hidden_inode); |
6d3d5e86 JK |
1845 | if (err < 0) { |
1846 | iget_failed(inode); | |
1847 | return ERR_PTR(err); | |
1da177e4 | 1848 | } |
6d3d5e86 | 1849 | unlock_new_inode(inode); |
1da177e4 LT |
1850 | |
1851 | return inode; | |
1da177e4 LT |
1852 | } |
1853 | ||
fcea62ba JK |
1854 | int udf_setup_indirect_aext(struct inode *inode, int block, |
1855 | struct extent_position *epos) | |
1da177e4 | 1856 | { |
fcea62ba JK |
1857 | struct super_block *sb = inode->i_sb; |
1858 | struct buffer_head *bh; | |
1da177e4 | 1859 | struct allocExtDesc *aed; |
fcea62ba JK |
1860 | struct extent_position nepos; |
1861 | struct kernel_lb_addr neloc; | |
1862 | int ver, adsize; | |
1da177e4 | 1863 | |
fcea62ba JK |
1864 | if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
1865 | adsize = sizeof(struct short_ad); | |
1866 | else if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_LONG) | |
1867 | adsize = sizeof(struct long_ad); | |
1da177e4 | 1868 | else |
4f1b1519 | 1869 | return -EIO; |
fcea62ba JK |
1870 | |
1871 | neloc.logicalBlockNum = block; | |
1872 | neloc.partitionReferenceNum = epos->block.partitionReferenceNum; | |
1873 | ||
1874 | bh = udf_tgetblk(sb, udf_get_lb_pblock(sb, &neloc, 0)); | |
1875 | if (!bh) | |
1876 | return -EIO; | |
1877 | lock_buffer(bh); | |
1878 | memset(bh->b_data, 0x00, sb->s_blocksize); | |
1879 | set_buffer_uptodate(bh); | |
1880 | unlock_buffer(bh); | |
1881 | mark_buffer_dirty_inode(bh, inode); | |
1882 | ||
1883 | aed = (struct allocExtDesc *)(bh->b_data); | |
1884 | if (!UDF_QUERY_FLAG(sb, UDF_FLAG_STRICT)) { | |
1885 | aed->previousAllocExtLocation = | |
1886 | cpu_to_le32(epos->block.logicalBlockNum); | |
1887 | } | |
1888 | aed->lengthAllocDescs = cpu_to_le32(0); | |
1889 | if (UDF_SB(sb)->s_udfrev >= 0x0200) | |
1890 | ver = 3; | |
1da177e4 | 1891 | else |
fcea62ba JK |
1892 | ver = 2; |
1893 | udf_new_tag(bh->b_data, TAG_IDENT_AED, ver, 1, block, | |
1894 | sizeof(struct tag)); | |
1895 | ||
1896 | nepos.block = neloc; | |
1897 | nepos.offset = sizeof(struct allocExtDesc); | |
1898 | nepos.bh = bh; | |
1899 | ||
1900 | /* | |
1901 | * Do we have to copy current last extent to make space for indirect | |
1902 | * one? | |
1903 | */ | |
1904 | if (epos->offset + adsize > sb->s_blocksize) { | |
1905 | struct kernel_lb_addr cp_loc; | |
1906 | uint32_t cp_len; | |
1907 | int cp_type; | |
1908 | ||
1909 | epos->offset -= adsize; | |
1910 | cp_type = udf_current_aext(inode, epos, &cp_loc, &cp_len, 0); | |
1911 | cp_len |= ((uint32_t)cp_type) << 30; | |
1912 | ||
1913 | __udf_add_aext(inode, &nepos, &cp_loc, cp_len, 1); | |
1914 | udf_write_aext(inode, epos, &nepos.block, | |
1915 | sb->s_blocksize | EXT_NEXT_EXTENT_ALLOCDECS, 0); | |
1916 | } else { | |
1917 | __udf_add_aext(inode, epos, &nepos.block, | |
1918 | sb->s_blocksize | EXT_NEXT_EXTENT_ALLOCDECS, 0); | |
1919 | } | |
1920 | ||
1921 | brelse(epos->bh); | |
1922 | *epos = nepos; | |
1923 | ||
1924 | return 0; | |
1925 | } | |
1926 | ||
1927 | /* | |
1928 | * Append extent at the given position - should be the first free one in inode | |
1929 | * / indirect extent. This function assumes there is enough space in the inode | |
1930 | * or indirect extent. Use udf_add_aext() if you didn't check for this before. | |
1931 | */ | |
1932 | int __udf_add_aext(struct inode *inode, struct extent_position *epos, | |
1933 | struct kernel_lb_addr *eloc, uint32_t elen, int inc) | |
1934 | { | |
1935 | struct udf_inode_info *iinfo = UDF_I(inode); | |
1936 | struct allocExtDesc *aed; | |
1937 | int adsize; | |
1da177e4 | 1938 | |
48d6d8ff | 1939 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
5ca4e4be | 1940 | adsize = sizeof(struct short_ad); |
48d6d8ff | 1941 | else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
5ca4e4be | 1942 | adsize = sizeof(struct long_ad); |
1da177e4 | 1943 | else |
7e49b6f2 | 1944 | return -EIO; |
1da177e4 | 1945 | |
fcea62ba JK |
1946 | if (!epos->bh) { |
1947 | WARN_ON(iinfo->i_lenAlloc != | |
1948 | epos->offset - udf_file_entry_alloc_offset(inode)); | |
1949 | } else { | |
1950 | aed = (struct allocExtDesc *)epos->bh->b_data; | |
1951 | WARN_ON(le32_to_cpu(aed->lengthAllocDescs) != | |
1952 | epos->offset - sizeof(struct allocExtDesc)); | |
1953 | WARN_ON(epos->offset + adsize > inode->i_sb->s_blocksize); | |
1da177e4 LT |
1954 | } |
1955 | ||
7e49b6f2 | 1956 | udf_write_aext(inode, epos, eloc, elen, inc); |
1da177e4 | 1957 | |
cb00ea35 | 1958 | if (!epos->bh) { |
48d6d8ff | 1959 | iinfo->i_lenAlloc += adsize; |
1da177e4 | 1960 | mark_inode_dirty(inode); |
cb00ea35 | 1961 | } else { |
ff116fc8 | 1962 | aed = (struct allocExtDesc *)epos->bh->b_data; |
c2104fda | 1963 | le32_add_cpu(&aed->lengthAllocDescs, adsize); |
4b11111a MS |
1964 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
1965 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) | |
1966 | udf_update_tag(epos->bh->b_data, | |
1967 | epos->offset + (inc ? 0 : adsize)); | |
1da177e4 | 1968 | else |
4b11111a MS |
1969 | udf_update_tag(epos->bh->b_data, |
1970 | sizeof(struct allocExtDesc)); | |
ff116fc8 | 1971 | mark_buffer_dirty_inode(epos->bh, inode); |
1da177e4 LT |
1972 | } |
1973 | ||
7e49b6f2 | 1974 | return 0; |
1da177e4 LT |
1975 | } |
1976 | ||
fcea62ba JK |
1977 | /* |
1978 | * Append extent at given position - should be the first free one in inode | |
1979 | * / indirect extent. Takes care of allocating and linking indirect blocks. | |
1980 | */ | |
1981 | int udf_add_aext(struct inode *inode, struct extent_position *epos, | |
1982 | struct kernel_lb_addr *eloc, uint32_t elen, int inc) | |
1983 | { | |
1984 | int adsize; | |
1985 | struct super_block *sb = inode->i_sb; | |
1986 | ||
1987 | if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_SHORT) | |
1988 | adsize = sizeof(struct short_ad); | |
1989 | else if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_LONG) | |
1990 | adsize = sizeof(struct long_ad); | |
1991 | else | |
1992 | return -EIO; | |
1993 | ||
1994 | if (epos->offset + (2 * adsize) > sb->s_blocksize) { | |
1995 | int err; | |
1996 | int new_block; | |
1997 | ||
1998 | new_block = udf_new_block(sb, NULL, | |
1999 | epos->block.partitionReferenceNum, | |
2000 | epos->block.logicalBlockNum, &err); | |
2001 | if (!new_block) | |
2002 | return -ENOSPC; | |
2003 | ||
2004 | err = udf_setup_indirect_aext(inode, new_block, epos); | |
2005 | if (err) | |
2006 | return err; | |
2007 | } | |
2008 | ||
2009 | return __udf_add_aext(inode, epos, eloc, elen, inc); | |
2010 | } | |
2011 | ||
7e49b6f2 JK |
2012 | void udf_write_aext(struct inode *inode, struct extent_position *epos, |
2013 | struct kernel_lb_addr *eloc, uint32_t elen, int inc) | |
1da177e4 LT |
2014 | { |
2015 | int adsize; | |
2016 | uint8_t *ptr; | |
5ca4e4be PE |
2017 | struct short_ad *sad; |
2018 | struct long_ad *lad; | |
48d6d8ff | 2019 | struct udf_inode_info *iinfo = UDF_I(inode); |
1da177e4 | 2020 | |
ff116fc8 | 2021 | if (!epos->bh) |
48d6d8ff | 2022 | ptr = iinfo->i_ext.i_data + epos->offset - |
4b11111a | 2023 | udf_file_entry_alloc_offset(inode) + |
48d6d8ff | 2024 | iinfo->i_lenEAttr; |
1da177e4 | 2025 | else |
ff116fc8 | 2026 | ptr = epos->bh->b_data + epos->offset; |
1da177e4 | 2027 | |
48d6d8ff | 2028 | switch (iinfo->i_alloc_type) { |
cb00ea35 | 2029 | case ICBTAG_FLAG_AD_SHORT: |
5ca4e4be | 2030 | sad = (struct short_ad *)ptr; |
28de7948 | 2031 | sad->extLength = cpu_to_le32(elen); |
97e961fd | 2032 | sad->extPosition = cpu_to_le32(eloc->logicalBlockNum); |
5ca4e4be | 2033 | adsize = sizeof(struct short_ad); |
28de7948 | 2034 | break; |
cb00ea35 | 2035 | case ICBTAG_FLAG_AD_LONG: |
5ca4e4be | 2036 | lad = (struct long_ad *)ptr; |
28de7948 | 2037 | lad->extLength = cpu_to_le32(elen); |
97e961fd | 2038 | lad->extLocation = cpu_to_lelb(*eloc); |
28de7948 | 2039 | memset(lad->impUse, 0x00, sizeof(lad->impUse)); |
5ca4e4be | 2040 | adsize = sizeof(struct long_ad); |
28de7948 | 2041 | break; |
cb00ea35 | 2042 | default: |
7e49b6f2 | 2043 | return; |
1da177e4 LT |
2044 | } |
2045 | ||
cb00ea35 | 2046 | if (epos->bh) { |
28de7948 | 2047 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
6c79e987 | 2048 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) { |
4b11111a MS |
2049 | struct allocExtDesc *aed = |
2050 | (struct allocExtDesc *)epos->bh->b_data; | |
ff116fc8 | 2051 | udf_update_tag(epos->bh->b_data, |
4b11111a MS |
2052 | le32_to_cpu(aed->lengthAllocDescs) + |
2053 | sizeof(struct allocExtDesc)); | |
1da177e4 | 2054 | } |
ff116fc8 | 2055 | mark_buffer_dirty_inode(epos->bh, inode); |
28de7948 | 2056 | } else { |
1da177e4 | 2057 | mark_inode_dirty(inode); |
28de7948 | 2058 | } |
1da177e4 LT |
2059 | |
2060 | if (inc) | |
ff116fc8 | 2061 | epos->offset += adsize; |
1da177e4 LT |
2062 | } |
2063 | ||
b0918d9f VN |
2064 | /* |
2065 | * Only 1 indirect extent in a row really makes sense but allow upto 16 in case | |
2066 | * someone does some weird stuff. | |
2067 | */ | |
2068 | #define UDF_MAX_INDIR_EXTS 16 | |
2069 | ||
4b11111a | 2070 | int8_t udf_next_aext(struct inode *inode, struct extent_position *epos, |
5ca4e4be | 2071 | struct kernel_lb_addr *eloc, uint32_t *elen, int inc) |
1da177e4 LT |
2072 | { |
2073 | int8_t etype; | |
b0918d9f | 2074 | unsigned int indirections = 0; |
1da177e4 | 2075 | |
ff116fc8 | 2076 | while ((etype = udf_current_aext(inode, epos, eloc, elen, inc)) == |
cb00ea35 | 2077 | (EXT_NEXT_EXTENT_ALLOCDECS >> 30)) { |
4b11111a | 2078 | int block; |
b0918d9f VN |
2079 | |
2080 | if (++indirections > UDF_MAX_INDIR_EXTS) { | |
2081 | udf_err(inode->i_sb, | |
2082 | "too many indirect extents in inode %lu\n", | |
2083 | inode->i_ino); | |
2084 | return -1; | |
2085 | } | |
2086 | ||
ff116fc8 JK |
2087 | epos->block = *eloc; |
2088 | epos->offset = sizeof(struct allocExtDesc); | |
3bf25cb4 | 2089 | brelse(epos->bh); |
97e961fd | 2090 | block = udf_get_lb_pblock(inode->i_sb, &epos->block, 0); |
4b11111a MS |
2091 | epos->bh = udf_tread(inode->i_sb, block); |
2092 | if (!epos->bh) { | |
2093 | udf_debug("reading block %d failed!\n", block); | |
1da177e4 LT |
2094 | return -1; |
2095 | } | |
2096 | } | |
2097 | ||
2098 | return etype; | |
2099 | } | |
2100 | ||
4b11111a | 2101 | int8_t udf_current_aext(struct inode *inode, struct extent_position *epos, |
5ca4e4be | 2102 | struct kernel_lb_addr *eloc, uint32_t *elen, int inc) |
1da177e4 LT |
2103 | { |
2104 | int alen; | |
2105 | int8_t etype; | |
2106 | uint8_t *ptr; | |
5ca4e4be PE |
2107 | struct short_ad *sad; |
2108 | struct long_ad *lad; | |
48d6d8ff | 2109 | struct udf_inode_info *iinfo = UDF_I(inode); |
28de7948 | 2110 | |
cb00ea35 | 2111 | if (!epos->bh) { |
ff116fc8 JK |
2112 | if (!epos->offset) |
2113 | epos->offset = udf_file_entry_alloc_offset(inode); | |
48d6d8ff | 2114 | ptr = iinfo->i_ext.i_data + epos->offset - |
4b11111a | 2115 | udf_file_entry_alloc_offset(inode) + |
48d6d8ff | 2116 | iinfo->i_lenEAttr; |
4b11111a | 2117 | alen = udf_file_entry_alloc_offset(inode) + |
48d6d8ff | 2118 | iinfo->i_lenAlloc; |
cb00ea35 | 2119 | } else { |
ff116fc8 JK |
2120 | if (!epos->offset) |
2121 | epos->offset = sizeof(struct allocExtDesc); | |
2122 | ptr = epos->bh->b_data + epos->offset; | |
28de7948 | 2123 | alen = sizeof(struct allocExtDesc) + |
4b11111a MS |
2124 | le32_to_cpu(((struct allocExtDesc *)epos->bh->b_data)-> |
2125 | lengthAllocDescs); | |
1da177e4 LT |
2126 | } |
2127 | ||
48d6d8ff | 2128 | switch (iinfo->i_alloc_type) { |
cb00ea35 | 2129 | case ICBTAG_FLAG_AD_SHORT: |
4b11111a MS |
2130 | sad = udf_get_fileshortad(ptr, alen, &epos->offset, inc); |
2131 | if (!sad) | |
28de7948 CG |
2132 | return -1; |
2133 | etype = le32_to_cpu(sad->extLength) >> 30; | |
2134 | eloc->logicalBlockNum = le32_to_cpu(sad->extPosition); | |
4b11111a | 2135 | eloc->partitionReferenceNum = |
48d6d8ff | 2136 | iinfo->i_location.partitionReferenceNum; |
28de7948 CG |
2137 | *elen = le32_to_cpu(sad->extLength) & UDF_EXTENT_LENGTH_MASK; |
2138 | break; | |
cb00ea35 | 2139 | case ICBTAG_FLAG_AD_LONG: |
4b11111a MS |
2140 | lad = udf_get_filelongad(ptr, alen, &epos->offset, inc); |
2141 | if (!lad) | |
1da177e4 | 2142 | return -1; |
28de7948 CG |
2143 | etype = le32_to_cpu(lad->extLength) >> 30; |
2144 | *eloc = lelb_to_cpu(lad->extLocation); | |
2145 | *elen = le32_to_cpu(lad->extLength) & UDF_EXTENT_LENGTH_MASK; | |
2146 | break; | |
2147 | default: | |
a983f368 | 2148 | udf_debug("alloc_type = %d unsupported\n", iinfo->i_alloc_type); |
28de7948 | 2149 | return -1; |
1da177e4 LT |
2150 | } |
2151 | ||
2152 | return etype; | |
2153 | } | |
2154 | ||
28de7948 | 2155 | static int8_t udf_insert_aext(struct inode *inode, struct extent_position epos, |
5ca4e4be | 2156 | struct kernel_lb_addr neloc, uint32_t nelen) |
1da177e4 | 2157 | { |
5ca4e4be | 2158 | struct kernel_lb_addr oeloc; |
1da177e4 LT |
2159 | uint32_t oelen; |
2160 | int8_t etype; | |
2161 | ||
ff116fc8 | 2162 | if (epos.bh) |
3bf25cb4 | 2163 | get_bh(epos.bh); |
1da177e4 | 2164 | |
cb00ea35 | 2165 | while ((etype = udf_next_aext(inode, &epos, &oeloc, &oelen, 0)) != -1) { |
97e961fd | 2166 | udf_write_aext(inode, &epos, &neloc, nelen, 1); |
1da177e4 LT |
2167 | neloc = oeloc; |
2168 | nelen = (etype << 30) | oelen; | |
2169 | } | |
97e961fd | 2170 | udf_add_aext(inode, &epos, &neloc, nelen, 1); |
3bf25cb4 | 2171 | brelse(epos.bh); |
28de7948 | 2172 | |
1da177e4 LT |
2173 | return (nelen >> 30); |
2174 | } | |
2175 | ||
4b11111a | 2176 | int8_t udf_delete_aext(struct inode *inode, struct extent_position epos, |
5ca4e4be | 2177 | struct kernel_lb_addr eloc, uint32_t elen) |
1da177e4 | 2178 | { |
ff116fc8 JK |
2179 | struct extent_position oepos; |
2180 | int adsize; | |
1da177e4 LT |
2181 | int8_t etype; |
2182 | struct allocExtDesc *aed; | |
48d6d8ff | 2183 | struct udf_inode_info *iinfo; |
1da177e4 | 2184 | |
cb00ea35 | 2185 | if (epos.bh) { |
3bf25cb4 JK |
2186 | get_bh(epos.bh); |
2187 | get_bh(epos.bh); | |
1da177e4 LT |
2188 | } |
2189 | ||
48d6d8ff MS |
2190 | iinfo = UDF_I(inode); |
2191 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) | |
5ca4e4be | 2192 | adsize = sizeof(struct short_ad); |
48d6d8ff | 2193 | else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
5ca4e4be | 2194 | adsize = sizeof(struct long_ad); |
1da177e4 LT |
2195 | else |
2196 | adsize = 0; | |
2197 | ||
ff116fc8 JK |
2198 | oepos = epos; |
2199 | if (udf_next_aext(inode, &epos, &eloc, &elen, 1) == -1) | |
1da177e4 LT |
2200 | return -1; |
2201 | ||
cb00ea35 | 2202 | while ((etype = udf_next_aext(inode, &epos, &eloc, &elen, 1)) != -1) { |
97e961fd | 2203 | udf_write_aext(inode, &oepos, &eloc, (etype << 30) | elen, 1); |
cb00ea35 | 2204 | if (oepos.bh != epos.bh) { |
ff116fc8 | 2205 | oepos.block = epos.block; |
3bf25cb4 JK |
2206 | brelse(oepos.bh); |
2207 | get_bh(epos.bh); | |
ff116fc8 JK |
2208 | oepos.bh = epos.bh; |
2209 | oepos.offset = epos.offset - adsize; | |
1da177e4 LT |
2210 | } |
2211 | } | |
5ca4e4be | 2212 | memset(&eloc, 0x00, sizeof(struct kernel_lb_addr)); |
1da177e4 LT |
2213 | elen = 0; |
2214 | ||
cb00ea35 | 2215 | if (epos.bh != oepos.bh) { |
97e961fd PE |
2216 | udf_free_blocks(inode->i_sb, inode, &epos.block, 0, 1); |
2217 | udf_write_aext(inode, &oepos, &eloc, elen, 1); | |
2218 | udf_write_aext(inode, &oepos, &eloc, elen, 1); | |
cb00ea35 | 2219 | if (!oepos.bh) { |
48d6d8ff | 2220 | iinfo->i_lenAlloc -= (adsize * 2); |
1da177e4 | 2221 | mark_inode_dirty(inode); |
cb00ea35 | 2222 | } else { |
ff116fc8 | 2223 | aed = (struct allocExtDesc *)oepos.bh->b_data; |
c2104fda | 2224 | le32_add_cpu(&aed->lengthAllocDescs, -(2 * adsize)); |
28de7948 | 2225 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
6c79e987 | 2226 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) |
4b11111a MS |
2227 | udf_update_tag(oepos.bh->b_data, |
2228 | oepos.offset - (2 * adsize)); | |
1da177e4 | 2229 | else |
4b11111a MS |
2230 | udf_update_tag(oepos.bh->b_data, |
2231 | sizeof(struct allocExtDesc)); | |
ff116fc8 | 2232 | mark_buffer_dirty_inode(oepos.bh, inode); |
1da177e4 | 2233 | } |
cb00ea35 | 2234 | } else { |
97e961fd | 2235 | udf_write_aext(inode, &oepos, &eloc, elen, 1); |
cb00ea35 | 2236 | if (!oepos.bh) { |
48d6d8ff | 2237 | iinfo->i_lenAlloc -= adsize; |
1da177e4 | 2238 | mark_inode_dirty(inode); |
cb00ea35 | 2239 | } else { |
ff116fc8 | 2240 | aed = (struct allocExtDesc *)oepos.bh->b_data; |
c2104fda | 2241 | le32_add_cpu(&aed->lengthAllocDescs, -adsize); |
28de7948 | 2242 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
6c79e987 | 2243 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) |
4b11111a MS |
2244 | udf_update_tag(oepos.bh->b_data, |
2245 | epos.offset - adsize); | |
1da177e4 | 2246 | else |
4b11111a MS |
2247 | udf_update_tag(oepos.bh->b_data, |
2248 | sizeof(struct allocExtDesc)); | |
ff116fc8 | 2249 | mark_buffer_dirty_inode(oepos.bh, inode); |
1da177e4 LT |
2250 | } |
2251 | } | |
647bd61a | 2252 | |
3bf25cb4 JK |
2253 | brelse(epos.bh); |
2254 | brelse(oepos.bh); | |
28de7948 | 2255 | |
1da177e4 LT |
2256 | return (elen >> 30); |
2257 | } | |
2258 | ||
4b11111a | 2259 | int8_t inode_bmap(struct inode *inode, sector_t block, |
5ca4e4be | 2260 | struct extent_position *pos, struct kernel_lb_addr *eloc, |
4b11111a | 2261 | uint32_t *elen, sector_t *offset) |
1da177e4 | 2262 | { |
4b11111a | 2263 | unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; |
bbc9abd2 | 2264 | loff_t lbcount = 0, bcount = (loff_t) block << blocksize_bits; |
1da177e4 | 2265 | int8_t etype; |
48d6d8ff | 2266 | struct udf_inode_info *iinfo; |
1da177e4 | 2267 | |
48d6d8ff | 2268 | iinfo = UDF_I(inode); |
99600051 NJ |
2269 | if (!udf_read_extent_cache(inode, bcount, &lbcount, pos)) { |
2270 | pos->offset = 0; | |
2271 | pos->block = iinfo->i_location; | |
2272 | pos->bh = NULL; | |
2273 | } | |
1da177e4 | 2274 | *elen = 0; |
cb00ea35 | 2275 | do { |
4b11111a MS |
2276 | etype = udf_next_aext(inode, pos, eloc, elen, 1); |
2277 | if (etype == -1) { | |
2278 | *offset = (bcount - lbcount) >> blocksize_bits; | |
48d6d8ff | 2279 | iinfo->i_lenExtents = lbcount; |
1da177e4 LT |
2280 | return -1; |
2281 | } | |
2282 | lbcount += *elen; | |
2283 | } while (lbcount <= bcount); | |
99600051 | 2284 | /* update extent cache */ |
b31c9ed9 | 2285 | udf_update_extent_cache(inode, lbcount - *elen, pos); |
4b11111a | 2286 | *offset = (bcount + *elen - lbcount) >> blocksize_bits; |
1da177e4 LT |
2287 | |
2288 | return etype; | |
2289 | } | |
2290 | ||
60448b1d | 2291 | long udf_block_map(struct inode *inode, sector_t block) |
1da177e4 | 2292 | { |
5ca4e4be | 2293 | struct kernel_lb_addr eloc; |
ff116fc8 | 2294 | uint32_t elen; |
60448b1d | 2295 | sector_t offset; |
28de7948 | 2296 | struct extent_position epos = {}; |
1da177e4 LT |
2297 | int ret; |
2298 | ||
4d0fb621 | 2299 | down_read(&UDF_I(inode)->i_data_sem); |
1da177e4 | 2300 | |
4b11111a MS |
2301 | if (inode_bmap(inode, block, &epos, &eloc, &elen, &offset) == |
2302 | (EXT_RECORDED_ALLOCATED >> 30)) | |
97e961fd | 2303 | ret = udf_get_lb_pblock(inode->i_sb, &eloc, offset); |
1da177e4 LT |
2304 | else |
2305 | ret = 0; | |
2306 | ||
4d0fb621 | 2307 | up_read(&UDF_I(inode)->i_data_sem); |
3bf25cb4 | 2308 | brelse(epos.bh); |
1da177e4 LT |
2309 | |
2310 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_VARCONV)) | |
2311 | return udf_fixed_to_variable(ret); | |
2312 | else | |
2313 | return ret; | |
2314 | } |