Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * inode.c | |
3 | * | |
4 | * PURPOSE | |
5 | * Inode handling routines for the OSTA-UDF(tm) filesystem. | |
6 | * | |
1da177e4 LT |
7 | * COPYRIGHT |
8 | * This file is distributed under the terms of the GNU General Public | |
9 | * License (GPL). Copies of the GPL can be obtained from: | |
10 | * ftp://prep.ai.mit.edu/pub/gnu/GPL | |
11 | * Each contributing author retains all rights to their own work. | |
12 | * | |
13 | * (C) 1998 Dave Boynton | |
14 | * (C) 1998-2004 Ben Fennema | |
15 | * (C) 1999-2000 Stelias Computing Inc | |
16 | * | |
17 | * HISTORY | |
18 | * | |
19 | * 10/04/98 dgb Added rudimentary directory functions | |
20 | * 10/07/98 Fully working udf_block_map! It works! | |
21 | * 11/25/98 bmap altered to better support extents | |
4b11111a MS |
22 | * 12/06/98 blf partition support in udf_iget, udf_block_map |
23 | * and udf_read_inode | |
1da177e4 LT |
24 | * 12/12/98 rewrote udf_block_map to handle next extents and descs across |
25 | * block boundaries (which is not actually allowed) | |
26 | * 12/20/98 added support for strategy 4096 | |
27 | * 03/07/99 rewrote udf_block_map (again) | |
28 | * New funcs, inode_bmap, udf_next_aext | |
29 | * 04/19/99 Support for writing device EA's for major/minor # | |
30 | */ | |
31 | ||
32 | #include "udfdecl.h" | |
33 | #include <linux/mm.h> | |
1da177e4 LT |
34 | #include <linux/module.h> |
35 | #include <linux/pagemap.h> | |
36 | #include <linux/buffer_head.h> | |
37 | #include <linux/writeback.h> | |
38 | #include <linux/slab.h> | |
f845fced | 39 | #include <linux/crc-itu-t.h> |
1da177e4 LT |
40 | |
41 | #include "udf_i.h" | |
42 | #include "udf_sb.h" | |
43 | ||
44 | MODULE_AUTHOR("Ben Fennema"); | |
45 | MODULE_DESCRIPTION("Universal Disk Format Filesystem"); | |
46 | MODULE_LICENSE("GPL"); | |
47 | ||
48 | #define EXTENT_MERGE_SIZE 5 | |
49 | ||
50 | static mode_t udf_convert_permissions(struct fileEntry *); | |
51 | static int udf_update_inode(struct inode *, int); | |
52 | static void udf_fill_inode(struct inode *, struct buffer_head *); | |
49521de1 | 53 | static int udf_sync_inode(struct inode *inode); |
647bd61a | 54 | static int udf_alloc_i_data(struct inode *inode, size_t size); |
60448b1d | 55 | static struct buffer_head *inode_getblk(struct inode *, sector_t, int *, |
1ed16171 | 56 | sector_t *, int *); |
ff116fc8 | 57 | static int8_t udf_insert_aext(struct inode *, struct extent_position, |
5ca4e4be | 58 | struct kernel_lb_addr, uint32_t); |
1da177e4 | 59 | static void udf_split_extents(struct inode *, int *, int, int, |
5ca4e4be | 60 | struct kernel_long_ad[EXTENT_MERGE_SIZE], int *); |
1da177e4 | 61 | static void udf_prealloc_extents(struct inode *, int, int, |
5ca4e4be | 62 | struct kernel_long_ad[EXTENT_MERGE_SIZE], int *); |
1da177e4 | 63 | static void udf_merge_extents(struct inode *, |
5ca4e4be | 64 | struct kernel_long_ad[EXTENT_MERGE_SIZE], int *); |
1da177e4 | 65 | static void udf_update_extents(struct inode *, |
5ca4e4be | 66 | struct kernel_long_ad[EXTENT_MERGE_SIZE], int, int, |
cb00ea35 | 67 | struct extent_position *); |
1da177e4 LT |
68 | static int udf_get_block(struct inode *, sector_t, struct buffer_head *, int); |
69 | ||
b1e32126 | 70 | |
3aac2b62 | 71 | void udf_evict_inode(struct inode *inode) |
1da177e4 | 72 | { |
2c948b3f | 73 | struct udf_inode_info *iinfo = UDF_I(inode); |
3aac2b62 AV |
74 | int want_delete = 0; |
75 | ||
3aac2b62 AV |
76 | if (!inode->i_nlink && !is_bad_inode(inode)) { |
77 | want_delete = 1; | |
7e49b6f2 | 78 | udf_setsize(inode, 0); |
3aac2b62 | 79 | udf_update_inode(inode, IS_SYNC(inode)); |
7e49b6f2 JK |
80 | } else |
81 | truncate_inode_pages(&inode->i_data, 0); | |
3aac2b62 AV |
82 | invalidate_inode_buffers(inode); |
83 | end_writeback(inode); | |
2c948b3f JK |
84 | if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB && |
85 | inode->i_size != iinfo->i_lenExtents) { | |
86 | printk(KERN_WARNING "UDF-fs (%s): Inode %lu (mode %o) has " | |
1537a363 | 87 | "inode size %llu different from extent length %llu. " |
2c948b3f JK |
88 | "Filesystem need not be standards compliant.\n", |
89 | inode->i_sb->s_id, inode->i_ino, inode->i_mode, | |
90 | (unsigned long long)inode->i_size, | |
91 | (unsigned long long)iinfo->i_lenExtents); | |
1da177e4 | 92 | } |
48d6d8ff MS |
93 | kfree(iinfo->i_ext.i_data); |
94 | iinfo->i_ext.i_data = NULL; | |
3aac2b62 | 95 | if (want_delete) { |
3aac2b62 | 96 | udf_free_inode(inode); |
3aac2b62 | 97 | } |
1da177e4 LT |
98 | } |
99 | ||
100 | static int udf_writepage(struct page *page, struct writeback_control *wbc) | |
101 | { | |
102 | return block_write_full_page(page, udf_get_block, wbc); | |
103 | } | |
104 | ||
105 | static int udf_readpage(struct file *file, struct page *page) | |
106 | { | |
107 | return block_read_full_page(page, udf_get_block); | |
108 | } | |
109 | ||
be021ee4 NP |
110 | static int udf_write_begin(struct file *file, struct address_space *mapping, |
111 | loff_t pos, unsigned len, unsigned flags, | |
112 | struct page **pagep, void **fsdata) | |
1da177e4 | 113 | { |
155130a4 CH |
114 | int ret; |
115 | ||
116 | ret = block_write_begin(mapping, pos, len, flags, pagep, udf_get_block); | |
117 | if (unlikely(ret)) { | |
7e49b6f2 JK |
118 | struct inode *inode = mapping->host; |
119 | struct udf_inode_info *iinfo = UDF_I(inode); | |
120 | loff_t isize = inode->i_size; | |
121 | ||
122 | if (pos + len > isize) { | |
123 | truncate_pagecache(inode, pos + len, isize); | |
124 | if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { | |
125 | down_write(&iinfo->i_data_sem); | |
126 | udf_truncate_extents(inode); | |
127 | up_write(&iinfo->i_data_sem); | |
128 | } | |
129 | } | |
155130a4 CH |
130 | } |
131 | ||
132 | return ret; | |
1da177e4 LT |
133 | } |
134 | ||
135 | static sector_t udf_bmap(struct address_space *mapping, sector_t block) | |
136 | { | |
cb00ea35 | 137 | return generic_block_bmap(mapping, block, udf_get_block); |
1da177e4 LT |
138 | } |
139 | ||
f5e54d6e | 140 | const struct address_space_operations udf_aops = { |
28de7948 CG |
141 | .readpage = udf_readpage, |
142 | .writepage = udf_writepage, | |
143 | .sync_page = block_sync_page, | |
be021ee4 NP |
144 | .write_begin = udf_write_begin, |
145 | .write_end = generic_write_end, | |
28de7948 | 146 | .bmap = udf_bmap, |
1da177e4 LT |
147 | }; |
148 | ||
7e49b6f2 | 149 | int udf_expand_file_adinicb(struct inode *inode) |
1da177e4 LT |
150 | { |
151 | struct page *page; | |
152 | char *kaddr; | |
48d6d8ff | 153 | struct udf_inode_info *iinfo = UDF_I(inode); |
7e49b6f2 | 154 | int err; |
1da177e4 LT |
155 | struct writeback_control udf_wbc = { |
156 | .sync_mode = WB_SYNC_NONE, | |
157 | .nr_to_write = 1, | |
158 | }; | |
159 | ||
48d6d8ff | 160 | if (!iinfo->i_lenAlloc) { |
1da177e4 | 161 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) |
48d6d8ff | 162 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT; |
1da177e4 | 163 | else |
48d6d8ff | 164 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG; |
7e49b6f2 JK |
165 | /* from now on we have normal address_space methods */ |
166 | inode->i_data.a_ops = &udf_aops; | |
1da177e4 | 167 | mark_inode_dirty(inode); |
7e49b6f2 | 168 | return 0; |
1da177e4 LT |
169 | } |
170 | ||
7e49b6f2 JK |
171 | page = find_or_create_page(inode->i_mapping, 0, GFP_NOFS); |
172 | if (!page) | |
173 | return -ENOMEM; | |
cd7619d6 | 174 | |
cb00ea35 | 175 | if (!PageUptodate(page)) { |
1da177e4 | 176 | kaddr = kmap(page); |
48d6d8ff MS |
177 | memset(kaddr + iinfo->i_lenAlloc, 0x00, |
178 | PAGE_CACHE_SIZE - iinfo->i_lenAlloc); | |
179 | memcpy(kaddr, iinfo->i_ext.i_data + iinfo->i_lenEAttr, | |
180 | iinfo->i_lenAlloc); | |
1da177e4 LT |
181 | flush_dcache_page(page); |
182 | SetPageUptodate(page); | |
183 | kunmap(page); | |
184 | } | |
48d6d8ff MS |
185 | memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr, 0x00, |
186 | iinfo->i_lenAlloc); | |
187 | iinfo->i_lenAlloc = 0; | |
1da177e4 | 188 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) |
48d6d8ff | 189 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT; |
1da177e4 | 190 | else |
48d6d8ff | 191 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG; |
7e49b6f2 JK |
192 | /* from now on we have normal address_space methods */ |
193 | inode->i_data.a_ops = &udf_aops; | |
194 | err = inode->i_data.a_ops->writepage(page, &udf_wbc); | |
195 | if (err) { | |
196 | /* Restore everything back so that we don't lose data... */ | |
197 | lock_page(page); | |
198 | kaddr = kmap(page); | |
199 | memcpy(iinfo->i_ext.i_data + iinfo->i_lenEAttr, kaddr, | |
200 | inode->i_size); | |
201 | kunmap(page); | |
202 | unlock_page(page); | |
203 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB; | |
204 | inode->i_data.a_ops = &udf_adinicb_aops; | |
205 | } | |
1da177e4 | 206 | page_cache_release(page); |
1da177e4 | 207 | mark_inode_dirty(inode); |
7e49b6f2 JK |
208 | |
209 | return err; | |
1da177e4 LT |
210 | } |
211 | ||
cb00ea35 CG |
212 | struct buffer_head *udf_expand_dir_adinicb(struct inode *inode, int *block, |
213 | int *err) | |
1da177e4 LT |
214 | { |
215 | int newblock; | |
ff116fc8 | 216 | struct buffer_head *dbh = NULL; |
5ca4e4be | 217 | struct kernel_lb_addr eloc; |
1da177e4 | 218 | uint8_t alloctype; |
ff116fc8 | 219 | struct extent_position epos; |
1da177e4 LT |
220 | |
221 | struct udf_fileident_bh sfibh, dfibh; | |
af793295 JK |
222 | loff_t f_pos = udf_ext0_offset(inode); |
223 | int size = udf_ext0_offset(inode) + inode->i_size; | |
1da177e4 | 224 | struct fileIdentDesc cfi, *sfi, *dfi; |
48d6d8ff | 225 | struct udf_inode_info *iinfo = UDF_I(inode); |
1da177e4 LT |
226 | |
227 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) | |
228 | alloctype = ICBTAG_FLAG_AD_SHORT; | |
229 | else | |
230 | alloctype = ICBTAG_FLAG_AD_LONG; | |
231 | ||
cb00ea35 | 232 | if (!inode->i_size) { |
48d6d8ff | 233 | iinfo->i_alloc_type = alloctype; |
1da177e4 LT |
234 | mark_inode_dirty(inode); |
235 | return NULL; | |
236 | } | |
237 | ||
238 | /* alloc block, and copy data to it */ | |
239 | *block = udf_new_block(inode->i_sb, inode, | |
48d6d8ff MS |
240 | iinfo->i_location.partitionReferenceNum, |
241 | iinfo->i_location.logicalBlockNum, err); | |
1da177e4 LT |
242 | if (!(*block)) |
243 | return NULL; | |
244 | newblock = udf_get_pblock(inode->i_sb, *block, | |
48d6d8ff | 245 | iinfo->i_location.partitionReferenceNum, |
c0b34438 | 246 | 0); |
1da177e4 LT |
247 | if (!newblock) |
248 | return NULL; | |
249 | dbh = udf_tgetblk(inode->i_sb, newblock); | |
250 | if (!dbh) | |
251 | return NULL; | |
252 | lock_buffer(dbh); | |
253 | memset(dbh->b_data, 0x00, inode->i_sb->s_blocksize); | |
254 | set_buffer_uptodate(dbh); | |
255 | unlock_buffer(dbh); | |
256 | mark_buffer_dirty_inode(dbh, inode); | |
257 | ||
4b11111a | 258 | sfibh.soffset = sfibh.eoffset = |
af793295 | 259 | f_pos & (inode->i_sb->s_blocksize - 1); |
ff116fc8 | 260 | sfibh.sbh = sfibh.ebh = NULL; |
1da177e4 LT |
261 | dfibh.soffset = dfibh.eoffset = 0; |
262 | dfibh.sbh = dfibh.ebh = dbh; | |
af793295 | 263 | while (f_pos < size) { |
48d6d8ff | 264 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB; |
4b11111a MS |
265 | sfi = udf_fileident_read(inode, &f_pos, &sfibh, &cfi, NULL, |
266 | NULL, NULL, NULL); | |
cb00ea35 | 267 | if (!sfi) { |
3bf25cb4 | 268 | brelse(dbh); |
1da177e4 LT |
269 | return NULL; |
270 | } | |
48d6d8ff | 271 | iinfo->i_alloc_type = alloctype; |
1da177e4 LT |
272 | sfi->descTag.tagLocation = cpu_to_le32(*block); |
273 | dfibh.soffset = dfibh.eoffset; | |
274 | dfibh.eoffset += (sfibh.eoffset - sfibh.soffset); | |
275 | dfi = (struct fileIdentDesc *)(dbh->b_data + dfibh.soffset); | |
276 | if (udf_write_fi(inode, sfi, dfi, &dfibh, sfi->impUse, | |
4b11111a MS |
277 | sfi->fileIdent + |
278 | le16_to_cpu(sfi->lengthOfImpUse))) { | |
48d6d8ff | 279 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB; |
3bf25cb4 | 280 | brelse(dbh); |
1da177e4 LT |
281 | return NULL; |
282 | } | |
283 | } | |
284 | mark_buffer_dirty_inode(dbh, inode); | |
285 | ||
48d6d8ff MS |
286 | memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr, 0, |
287 | iinfo->i_lenAlloc); | |
288 | iinfo->i_lenAlloc = 0; | |
1da177e4 | 289 | eloc.logicalBlockNum = *block; |
4b11111a | 290 | eloc.partitionReferenceNum = |
48d6d8ff | 291 | iinfo->i_location.partitionReferenceNum; |
2c948b3f | 292 | iinfo->i_lenExtents = inode->i_size; |
ff116fc8 | 293 | epos.bh = NULL; |
48d6d8ff | 294 | epos.block = iinfo->i_location; |
ff116fc8 | 295 | epos.offset = udf_file_entry_alloc_offset(inode); |
2c948b3f | 296 | udf_add_aext(inode, &epos, &eloc, inode->i_size, 0); |
1da177e4 LT |
297 | /* UniqueID stuff */ |
298 | ||
3bf25cb4 | 299 | brelse(epos.bh); |
1da177e4 LT |
300 | mark_inode_dirty(inode); |
301 | return dbh; | |
302 | } | |
303 | ||
cb00ea35 CG |
304 | static int udf_get_block(struct inode *inode, sector_t block, |
305 | struct buffer_head *bh_result, int create) | |
1da177e4 LT |
306 | { |
307 | int err, new; | |
308 | struct buffer_head *bh; | |
1ed16171 | 309 | sector_t phys = 0; |
48d6d8ff | 310 | struct udf_inode_info *iinfo; |
1da177e4 | 311 | |
cb00ea35 | 312 | if (!create) { |
1da177e4 LT |
313 | phys = udf_block_map(inode, block); |
314 | if (phys) | |
315 | map_bh(bh_result, inode->i_sb, phys); | |
316 | return 0; | |
317 | } | |
318 | ||
319 | err = -EIO; | |
320 | new = 0; | |
321 | bh = NULL; | |
48d6d8ff | 322 | iinfo = UDF_I(inode); |
4d0fb621 AIB |
323 | |
324 | down_write(&iinfo->i_data_sem); | |
48d6d8ff MS |
325 | if (block == iinfo->i_next_alloc_block + 1) { |
326 | iinfo->i_next_alloc_block++; | |
327 | iinfo->i_next_alloc_goal++; | |
1da177e4 LT |
328 | } |
329 | ||
330 | err = 0; | |
331 | ||
332 | bh = inode_getblk(inode, block, &err, &phys, &new); | |
2c2111c2 | 333 | BUG_ON(bh); |
1da177e4 LT |
334 | if (err) |
335 | goto abort; | |
2c2111c2 | 336 | BUG_ON(!phys); |
1da177e4 LT |
337 | |
338 | if (new) | |
339 | set_buffer_new(bh_result); | |
340 | map_bh(bh_result, inode->i_sb, phys); | |
28de7948 CG |
341 | |
342 | abort: | |
4d0fb621 | 343 | up_write(&iinfo->i_data_sem); |
1da177e4 | 344 | return err; |
1da177e4 LT |
345 | } |
346 | ||
cb00ea35 CG |
347 | static struct buffer_head *udf_getblk(struct inode *inode, long block, |
348 | int create, int *err) | |
1da177e4 | 349 | { |
28de7948 | 350 | struct buffer_head *bh; |
1da177e4 LT |
351 | struct buffer_head dummy; |
352 | ||
353 | dummy.b_state = 0; | |
354 | dummy.b_blocknr = -1000; | |
355 | *err = udf_get_block(inode, block, &dummy, create); | |
cb00ea35 | 356 | if (!*err && buffer_mapped(&dummy)) { |
1da177e4 | 357 | bh = sb_getblk(inode->i_sb, dummy.b_blocknr); |
cb00ea35 | 358 | if (buffer_new(&dummy)) { |
1da177e4 LT |
359 | lock_buffer(bh); |
360 | memset(bh->b_data, 0x00, inode->i_sb->s_blocksize); | |
361 | set_buffer_uptodate(bh); | |
362 | unlock_buffer(bh); | |
363 | mark_buffer_dirty_inode(bh, inode); | |
364 | } | |
365 | return bh; | |
366 | } | |
28de7948 | 367 | |
1da177e4 LT |
368 | return NULL; |
369 | } | |
370 | ||
31170b6a | 371 | /* Extend the file by 'blocks' blocks, return the number of extents added */ |
7e49b6f2 JK |
372 | static int udf_do_extend_file(struct inode *inode, |
373 | struct extent_position *last_pos, | |
374 | struct kernel_long_ad *last_ext, | |
375 | sector_t blocks) | |
31170b6a JK |
376 | { |
377 | sector_t add; | |
378 | int count = 0, fake = !(last_ext->extLength & UDF_EXTENT_LENGTH_MASK); | |
379 | struct super_block *sb = inode->i_sb; | |
5ca4e4be | 380 | struct kernel_lb_addr prealloc_loc = {}; |
31170b6a | 381 | int prealloc_len = 0; |
48d6d8ff | 382 | struct udf_inode_info *iinfo; |
7e49b6f2 | 383 | int err; |
31170b6a JK |
384 | |
385 | /* The previous extent is fake and we should not extend by anything | |
386 | * - there's nothing to do... */ | |
387 | if (!blocks && fake) | |
388 | return 0; | |
28de7948 | 389 | |
48d6d8ff | 390 | iinfo = UDF_I(inode); |
31170b6a JK |
391 | /* Round the last extent up to a multiple of block size */ |
392 | if (last_ext->extLength & (sb->s_blocksize - 1)) { | |
393 | last_ext->extLength = | |
28de7948 CG |
394 | (last_ext->extLength & UDF_EXTENT_FLAG_MASK) | |
395 | (((last_ext->extLength & UDF_EXTENT_LENGTH_MASK) + | |
396 | sb->s_blocksize - 1) & ~(sb->s_blocksize - 1)); | |
48d6d8ff MS |
397 | iinfo->i_lenExtents = |
398 | (iinfo->i_lenExtents + sb->s_blocksize - 1) & | |
28de7948 | 399 | ~(sb->s_blocksize - 1); |
31170b6a | 400 | } |
28de7948 | 401 | |
31170b6a | 402 | /* Last extent are just preallocated blocks? */ |
4b11111a MS |
403 | if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) == |
404 | EXT_NOT_RECORDED_ALLOCATED) { | |
31170b6a JK |
405 | /* Save the extent so that we can reattach it to the end */ |
406 | prealloc_loc = last_ext->extLocation; | |
407 | prealloc_len = last_ext->extLength; | |
408 | /* Mark the extent as a hole */ | |
409 | last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | | |
28de7948 | 410 | (last_ext->extLength & UDF_EXTENT_LENGTH_MASK); |
31170b6a | 411 | last_ext->extLocation.logicalBlockNum = 0; |
4b11111a | 412 | last_ext->extLocation.partitionReferenceNum = 0; |
31170b6a | 413 | } |
28de7948 | 414 | |
31170b6a | 415 | /* Can we merge with the previous extent? */ |
4b11111a MS |
416 | if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) == |
417 | EXT_NOT_RECORDED_NOT_ALLOCATED) { | |
418 | add = ((1 << 30) - sb->s_blocksize - | |
419 | (last_ext->extLength & UDF_EXTENT_LENGTH_MASK)) >> | |
420 | sb->s_blocksize_bits; | |
31170b6a JK |
421 | if (add > blocks) |
422 | add = blocks; | |
423 | blocks -= add; | |
424 | last_ext->extLength += add << sb->s_blocksize_bits; | |
425 | } | |
426 | ||
427 | if (fake) { | |
97e961fd | 428 | udf_add_aext(inode, last_pos, &last_ext->extLocation, |
cb00ea35 | 429 | last_ext->extLength, 1); |
31170b6a | 430 | count++; |
4b11111a | 431 | } else |
97e961fd | 432 | udf_write_aext(inode, last_pos, &last_ext->extLocation, |
4b11111a | 433 | last_ext->extLength, 1); |
28de7948 | 434 | |
31170b6a JK |
435 | /* Managed to do everything necessary? */ |
436 | if (!blocks) | |
437 | goto out; | |
438 | ||
439 | /* All further extents will be NOT_RECORDED_NOT_ALLOCATED */ | |
440 | last_ext->extLocation.logicalBlockNum = 0; | |
4b11111a | 441 | last_ext->extLocation.partitionReferenceNum = 0; |
28de7948 | 442 | add = (1 << (30-sb->s_blocksize_bits)) - 1; |
4b11111a MS |
443 | last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | |
444 | (add << sb->s_blocksize_bits); | |
28de7948 | 445 | |
31170b6a JK |
446 | /* Create enough extents to cover the whole hole */ |
447 | while (blocks > add) { | |
448 | blocks -= add; | |
7e49b6f2 JK |
449 | err = udf_add_aext(inode, last_pos, &last_ext->extLocation, |
450 | last_ext->extLength, 1); | |
451 | if (err) | |
452 | return err; | |
31170b6a JK |
453 | count++; |
454 | } | |
455 | if (blocks) { | |
456 | last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | | |
28de7948 | 457 | (blocks << sb->s_blocksize_bits); |
7e49b6f2 JK |
458 | err = udf_add_aext(inode, last_pos, &last_ext->extLocation, |
459 | last_ext->extLength, 1); | |
460 | if (err) | |
461 | return err; | |
31170b6a JK |
462 | count++; |
463 | } | |
28de7948 CG |
464 | |
465 | out: | |
31170b6a JK |
466 | /* Do we have some preallocated blocks saved? */ |
467 | if (prealloc_len) { | |
7e49b6f2 JK |
468 | err = udf_add_aext(inode, last_pos, &prealloc_loc, |
469 | prealloc_len, 1); | |
470 | if (err) | |
471 | return err; | |
31170b6a JK |
472 | last_ext->extLocation = prealloc_loc; |
473 | last_ext->extLength = prealloc_len; | |
474 | count++; | |
475 | } | |
28de7948 | 476 | |
31170b6a | 477 | /* last_pos should point to the last written extent... */ |
48d6d8ff | 478 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
5ca4e4be | 479 | last_pos->offset -= sizeof(struct short_ad); |
48d6d8ff | 480 | else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
5ca4e4be | 481 | last_pos->offset -= sizeof(struct long_ad); |
31170b6a | 482 | else |
7e49b6f2 | 483 | return -EIO; |
28de7948 | 484 | |
31170b6a JK |
485 | return count; |
486 | } | |
487 | ||
7e49b6f2 JK |
488 | static int udf_extend_file(struct inode *inode, loff_t newsize) |
489 | { | |
490 | ||
491 | struct extent_position epos; | |
492 | struct kernel_lb_addr eloc; | |
493 | uint32_t elen; | |
494 | int8_t etype; | |
495 | struct super_block *sb = inode->i_sb; | |
496 | sector_t first_block = newsize >> sb->s_blocksize_bits, offset; | |
497 | int adsize; | |
498 | struct udf_inode_info *iinfo = UDF_I(inode); | |
499 | struct kernel_long_ad extent; | |
500 | int err; | |
501 | ||
502 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) | |
503 | adsize = sizeof(struct short_ad); | |
504 | else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) | |
505 | adsize = sizeof(struct long_ad); | |
506 | else | |
507 | BUG(); | |
508 | ||
509 | etype = inode_bmap(inode, first_block, &epos, &eloc, &elen, &offset); | |
510 | ||
511 | /* File has extent covering the new size (could happen when extending | |
512 | * inside a block)? */ | |
513 | if (etype != -1) | |
514 | return 0; | |
515 | if (newsize & (sb->s_blocksize - 1)) | |
516 | offset++; | |
517 | /* Extended file just to the boundary of the last file block? */ | |
518 | if (offset == 0) | |
519 | return 0; | |
520 | ||
521 | /* Truncate is extending the file by 'offset' blocks */ | |
522 | if ((!epos.bh && epos.offset == udf_file_entry_alloc_offset(inode)) || | |
523 | (epos.bh && epos.offset == sizeof(struct allocExtDesc))) { | |
524 | /* File has no extents at all or has empty last | |
525 | * indirect extent! Create a fake extent... */ | |
526 | extent.extLocation.logicalBlockNum = 0; | |
527 | extent.extLocation.partitionReferenceNum = 0; | |
528 | extent.extLength = EXT_NOT_RECORDED_NOT_ALLOCATED; | |
529 | } else { | |
530 | epos.offset -= adsize; | |
531 | etype = udf_next_aext(inode, &epos, &extent.extLocation, | |
532 | &extent.extLength, 0); | |
533 | extent.extLength |= etype << 30; | |
534 | } | |
535 | err = udf_do_extend_file(inode, &epos, &extent, offset); | |
536 | if (err < 0) | |
537 | goto out; | |
538 | err = 0; | |
539 | iinfo->i_lenExtents = newsize; | |
540 | out: | |
541 | brelse(epos.bh); | |
542 | return err; | |
543 | } | |
544 | ||
cb00ea35 | 545 | static struct buffer_head *inode_getblk(struct inode *inode, sector_t block, |
1ed16171 | 546 | int *err, sector_t *phys, int *new) |
1da177e4 | 547 | { |
31170b6a | 548 | static sector_t last_block; |
ff116fc8 | 549 | struct buffer_head *result = NULL; |
5ca4e4be | 550 | struct kernel_long_ad laarr[EXTENT_MERGE_SIZE]; |
ff116fc8 | 551 | struct extent_position prev_epos, cur_epos, next_epos; |
1da177e4 | 552 | int count = 0, startnum = 0, endnum = 0; |
85d71244 | 553 | uint32_t elen = 0, tmpelen; |
5ca4e4be | 554 | struct kernel_lb_addr eloc, tmpeloc; |
1da177e4 | 555 | int c = 1; |
60448b1d JK |
556 | loff_t lbcount = 0, b_off = 0; |
557 | uint32_t newblocknum, newblock; | |
558 | sector_t offset = 0; | |
1da177e4 | 559 | int8_t etype; |
48d6d8ff MS |
560 | struct udf_inode_info *iinfo = UDF_I(inode); |
561 | int goal = 0, pgoal = iinfo->i_location.logicalBlockNum; | |
31170b6a | 562 | int lastblock = 0; |
1da177e4 | 563 | |
ff116fc8 | 564 | prev_epos.offset = udf_file_entry_alloc_offset(inode); |
48d6d8ff | 565 | prev_epos.block = iinfo->i_location; |
ff116fc8 JK |
566 | prev_epos.bh = NULL; |
567 | cur_epos = next_epos = prev_epos; | |
28de7948 | 568 | b_off = (loff_t)block << inode->i_sb->s_blocksize_bits; |
1da177e4 LT |
569 | |
570 | /* find the extent which contains the block we are looking for. | |
cb00ea35 CG |
571 | alternate between laarr[0] and laarr[1] for locations of the |
572 | current extent, and the previous extent */ | |
573 | do { | |
574 | if (prev_epos.bh != cur_epos.bh) { | |
3bf25cb4 JK |
575 | brelse(prev_epos.bh); |
576 | get_bh(cur_epos.bh); | |
ff116fc8 | 577 | prev_epos.bh = cur_epos.bh; |
1da177e4 | 578 | } |
cb00ea35 | 579 | if (cur_epos.bh != next_epos.bh) { |
3bf25cb4 JK |
580 | brelse(cur_epos.bh); |
581 | get_bh(next_epos.bh); | |
ff116fc8 | 582 | cur_epos.bh = next_epos.bh; |
1da177e4 LT |
583 | } |
584 | ||
585 | lbcount += elen; | |
586 | ||
ff116fc8 JK |
587 | prev_epos.block = cur_epos.block; |
588 | cur_epos.block = next_epos.block; | |
1da177e4 | 589 | |
ff116fc8 JK |
590 | prev_epos.offset = cur_epos.offset; |
591 | cur_epos.offset = next_epos.offset; | |
1da177e4 | 592 | |
4b11111a MS |
593 | etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 1); |
594 | if (etype == -1) | |
1da177e4 LT |
595 | break; |
596 | ||
597 | c = !c; | |
598 | ||
599 | laarr[c].extLength = (etype << 30) | elen; | |
600 | laarr[c].extLocation = eloc; | |
601 | ||
602 | if (etype != (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) | |
603 | pgoal = eloc.logicalBlockNum + | |
28de7948 CG |
604 | ((elen + inode->i_sb->s_blocksize - 1) >> |
605 | inode->i_sb->s_blocksize_bits); | |
1da177e4 | 606 | |
cb00ea35 | 607 | count++; |
1da177e4 LT |
608 | } while (lbcount + elen <= b_off); |
609 | ||
610 | b_off -= lbcount; | |
611 | offset = b_off >> inode->i_sb->s_blocksize_bits; | |
85d71244 JK |
612 | /* |
613 | * Move prev_epos and cur_epos into indirect extent if we are at | |
614 | * the pointer to it | |
615 | */ | |
616 | udf_next_aext(inode, &prev_epos, &tmpeloc, &tmpelen, 0); | |
617 | udf_next_aext(inode, &cur_epos, &tmpeloc, &tmpelen, 0); | |
1da177e4 LT |
618 | |
619 | /* if the extent is allocated and recorded, return the block | |
cb00ea35 | 620 | if the extent is not a multiple of the blocksize, round up */ |
1da177e4 | 621 | |
cb00ea35 CG |
622 | if (etype == (EXT_RECORDED_ALLOCATED >> 30)) { |
623 | if (elen & (inode->i_sb->s_blocksize - 1)) { | |
1da177e4 | 624 | elen = EXT_RECORDED_ALLOCATED | |
28de7948 CG |
625 | ((elen + inode->i_sb->s_blocksize - 1) & |
626 | ~(inode->i_sb->s_blocksize - 1)); | |
7e49b6f2 | 627 | udf_write_aext(inode, &cur_epos, &eloc, elen, 1); |
1da177e4 | 628 | } |
3bf25cb4 JK |
629 | brelse(prev_epos.bh); |
630 | brelse(cur_epos.bh); | |
631 | brelse(next_epos.bh); | |
97e961fd | 632 | newblock = udf_get_lb_pblock(inode->i_sb, &eloc, offset); |
1da177e4 LT |
633 | *phys = newblock; |
634 | return NULL; | |
635 | } | |
636 | ||
31170b6a JK |
637 | last_block = block; |
638 | /* Are we beyond EOF? */ | |
cb00ea35 | 639 | if (etype == -1) { |
31170b6a JK |
640 | int ret; |
641 | ||
642 | if (count) { | |
643 | if (c) | |
644 | laarr[0] = laarr[1]; | |
645 | startnum = 1; | |
cb00ea35 | 646 | } else { |
31170b6a | 647 | /* Create a fake extent when there's not one */ |
4b11111a | 648 | memset(&laarr[0].extLocation, 0x00, |
5ca4e4be | 649 | sizeof(struct kernel_lb_addr)); |
31170b6a | 650 | laarr[0].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED; |
7e49b6f2 | 651 | /* Will udf_do_extend_file() create real extent from |
4b11111a | 652 | a fake one? */ |
31170b6a JK |
653 | startnum = (offset > 0); |
654 | } | |
655 | /* Create extents for the hole between EOF and offset */ | |
7e49b6f2 JK |
656 | ret = udf_do_extend_file(inode, &prev_epos, laarr, offset); |
657 | if (ret < 0) { | |
31170b6a JK |
658 | brelse(prev_epos.bh); |
659 | brelse(cur_epos.bh); | |
660 | brelse(next_epos.bh); | |
7e49b6f2 | 661 | *err = ret; |
31170b6a JK |
662 | return NULL; |
663 | } | |
664 | c = 0; | |
665 | offset = 0; | |
666 | count += ret; | |
667 | /* We are not covered by a preallocated extent? */ | |
4b11111a MS |
668 | if ((laarr[0].extLength & UDF_EXTENT_FLAG_MASK) != |
669 | EXT_NOT_RECORDED_ALLOCATED) { | |
31170b6a JK |
670 | /* Is there any real extent? - otherwise we overwrite |
671 | * the fake one... */ | |
672 | if (count) | |
673 | c = !c; | |
674 | laarr[c].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | | |
28de7948 | 675 | inode->i_sb->s_blocksize; |
4b11111a | 676 | memset(&laarr[c].extLocation, 0x00, |
5ca4e4be | 677 | sizeof(struct kernel_lb_addr)); |
cb00ea35 CG |
678 | count++; |
679 | endnum++; | |
31170b6a | 680 | } |
cb00ea35 | 681 | endnum = c + 1; |
1da177e4 | 682 | lastblock = 1; |
cb00ea35 | 683 | } else { |
1da177e4 LT |
684 | endnum = startnum = ((count > 2) ? 2 : count); |
685 | ||
4b11111a MS |
686 | /* if the current extent is in position 0, |
687 | swap it with the previous */ | |
cb00ea35 | 688 | if (!c && count != 1) { |
31170b6a JK |
689 | laarr[2] = laarr[0]; |
690 | laarr[0] = laarr[1]; | |
691 | laarr[1] = laarr[2]; | |
692 | c = 1; | |
693 | } | |
1da177e4 | 694 | |
4b11111a MS |
695 | /* if the current block is located in an extent, |
696 | read the next extent */ | |
697 | etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 0); | |
698 | if (etype != -1) { | |
cb00ea35 CG |
699 | laarr[c + 1].extLength = (etype << 30) | elen; |
700 | laarr[c + 1].extLocation = eloc; | |
701 | count++; | |
702 | startnum++; | |
703 | endnum++; | |
4b11111a | 704 | } else |
1da177e4 LT |
705 | lastblock = 1; |
706 | } | |
1da177e4 LT |
707 | |
708 | /* if the current extent is not recorded but allocated, get the | |
28de7948 | 709 | * block in the extent corresponding to the requested block */ |
4b11111a | 710 | if ((laarr[c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30)) |
1da177e4 | 711 | newblocknum = laarr[c].extLocation.logicalBlockNum + offset; |
4b11111a | 712 | else { /* otherwise, allocate a new block */ |
48d6d8ff MS |
713 | if (iinfo->i_next_alloc_block == block) |
714 | goal = iinfo->i_next_alloc_goal; | |
1da177e4 | 715 | |
cb00ea35 | 716 | if (!goal) { |
4b11111a | 717 | if (!(goal = pgoal)) /* XXX: what was intended here? */ |
48d6d8ff | 718 | goal = iinfo->i_location.logicalBlockNum + 1; |
1da177e4 LT |
719 | } |
720 | ||
4b11111a | 721 | newblocknum = udf_new_block(inode->i_sb, inode, |
48d6d8ff | 722 | iinfo->i_location.partitionReferenceNum, |
4b11111a MS |
723 | goal, err); |
724 | if (!newblocknum) { | |
3bf25cb4 | 725 | brelse(prev_epos.bh); |
1da177e4 LT |
726 | *err = -ENOSPC; |
727 | return NULL; | |
728 | } | |
48d6d8ff | 729 | iinfo->i_lenExtents += inode->i_sb->s_blocksize; |
1da177e4 LT |
730 | } |
731 | ||
4b11111a MS |
732 | /* if the extent the requsted block is located in contains multiple |
733 | * blocks, split the extent into at most three extents. blocks prior | |
734 | * to requested block, requested block, and blocks after requested | |
735 | * block */ | |
1da177e4 LT |
736 | udf_split_extents(inode, &c, offset, newblocknum, laarr, &endnum); |
737 | ||
738 | #ifdef UDF_PREALLOCATE | |
81056dd0 JK |
739 | /* We preallocate blocks only for regular files. It also makes sense |
740 | * for directories but there's a problem when to drop the | |
741 | * preallocation. We might use some delayed work for that but I feel | |
742 | * it's overengineering for a filesystem like UDF. */ | |
743 | if (S_ISREG(inode->i_mode)) | |
744 | udf_prealloc_extents(inode, c, lastblock, laarr, &endnum); | |
1da177e4 LT |
745 | #endif |
746 | ||
747 | /* merge any continuous blocks in laarr */ | |
748 | udf_merge_extents(inode, laarr, &endnum); | |
749 | ||
750 | /* write back the new extents, inserting new extents if the new number | |
28de7948 CG |
751 | * of extents is greater than the old number, and deleting extents if |
752 | * the new number of extents is less than the old number */ | |
ff116fc8 | 753 | udf_update_extents(inode, laarr, startnum, endnum, &prev_epos); |
1da177e4 | 754 | |
3bf25cb4 | 755 | brelse(prev_epos.bh); |
1da177e4 | 756 | |
4b11111a | 757 | newblock = udf_get_pblock(inode->i_sb, newblocknum, |
48d6d8ff | 758 | iinfo->i_location.partitionReferenceNum, 0); |
4b11111a | 759 | if (!newblock) |
1da177e4 | 760 | return NULL; |
1da177e4 LT |
761 | *phys = newblock; |
762 | *err = 0; | |
763 | *new = 1; | |
48d6d8ff MS |
764 | iinfo->i_next_alloc_block = block; |
765 | iinfo->i_next_alloc_goal = newblocknum; | |
1da177e4 LT |
766 | inode->i_ctime = current_fs_time(inode->i_sb); |
767 | ||
768 | if (IS_SYNC(inode)) | |
769 | udf_sync_inode(inode); | |
770 | else | |
771 | mark_inode_dirty(inode); | |
28de7948 | 772 | |
1da177e4 LT |
773 | return result; |
774 | } | |
775 | ||
cb00ea35 CG |
776 | static void udf_split_extents(struct inode *inode, int *c, int offset, |
777 | int newblocknum, | |
5ca4e4be | 778 | struct kernel_long_ad laarr[EXTENT_MERGE_SIZE], |
cb00ea35 | 779 | int *endnum) |
1da177e4 | 780 | { |
4b11111a MS |
781 | unsigned long blocksize = inode->i_sb->s_blocksize; |
782 | unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; | |
783 | ||
1da177e4 | 784 | if ((laarr[*c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30) || |
4b11111a MS |
785 | (laarr[*c].extLength >> 30) == |
786 | (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) { | |
1da177e4 LT |
787 | int curr = *c; |
788 | int blen = ((laarr[curr].extLength & UDF_EXTENT_LENGTH_MASK) + | |
4b11111a | 789 | blocksize - 1) >> blocksize_bits; |
1da177e4 LT |
790 | int8_t etype = (laarr[curr].extLength >> 30); |
791 | ||
4b11111a | 792 | if (blen == 1) |
28de7948 | 793 | ; |
4b11111a | 794 | else if (!offset || blen == offset + 1) { |
cb00ea35 CG |
795 | laarr[curr + 2] = laarr[curr + 1]; |
796 | laarr[curr + 1] = laarr[curr]; | |
797 | } else { | |
798 | laarr[curr + 3] = laarr[curr + 1]; | |
799 | laarr[curr + 2] = laarr[curr + 1] = laarr[curr]; | |
800 | } | |
801 | ||
802 | if (offset) { | |
803 | if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30)) { | |
4b11111a | 804 | udf_free_blocks(inode->i_sb, inode, |
97e961fd | 805 | &laarr[curr].extLocation, |
4b11111a MS |
806 | 0, offset); |
807 | laarr[curr].extLength = | |
808 | EXT_NOT_RECORDED_NOT_ALLOCATED | | |
809 | (offset << blocksize_bits); | |
1da177e4 | 810 | laarr[curr].extLocation.logicalBlockNum = 0; |
4b11111a MS |
811 | laarr[curr].extLocation. |
812 | partitionReferenceNum = 0; | |
813 | } else | |
1da177e4 | 814 | laarr[curr].extLength = (etype << 30) | |
4b11111a | 815 | (offset << blocksize_bits); |
cb00ea35 CG |
816 | curr++; |
817 | (*c)++; | |
818 | (*endnum)++; | |
1da177e4 | 819 | } |
647bd61a | 820 | |
1da177e4 LT |
821 | laarr[curr].extLocation.logicalBlockNum = newblocknum; |
822 | if (etype == (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) | |
823 | laarr[curr].extLocation.partitionReferenceNum = | |
c0b34438 | 824 | UDF_I(inode)->i_location.partitionReferenceNum; |
1da177e4 | 825 | laarr[curr].extLength = EXT_RECORDED_ALLOCATED | |
4b11111a | 826 | blocksize; |
cb00ea35 | 827 | curr++; |
1da177e4 | 828 | |
cb00ea35 | 829 | if (blen != offset + 1) { |
1da177e4 | 830 | if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30)) |
4b11111a MS |
831 | laarr[curr].extLocation.logicalBlockNum += |
832 | offset + 1; | |
28de7948 | 833 | laarr[curr].extLength = (etype << 30) | |
4b11111a | 834 | ((blen - (offset + 1)) << blocksize_bits); |
cb00ea35 CG |
835 | curr++; |
836 | (*endnum)++; | |
1da177e4 LT |
837 | } |
838 | } | |
839 | } | |
840 | ||
841 | static void udf_prealloc_extents(struct inode *inode, int c, int lastblock, | |
5ca4e4be | 842 | struct kernel_long_ad laarr[EXTENT_MERGE_SIZE], |
cb00ea35 | 843 | int *endnum) |
1da177e4 LT |
844 | { |
845 | int start, length = 0, currlength = 0, i; | |
846 | ||
cb00ea35 | 847 | if (*endnum >= (c + 1)) { |
1da177e4 LT |
848 | if (!lastblock) |
849 | return; | |
850 | else | |
851 | start = c; | |
cb00ea35 | 852 | } else { |
4b11111a MS |
853 | if ((laarr[c + 1].extLength >> 30) == |
854 | (EXT_NOT_RECORDED_ALLOCATED >> 30)) { | |
cb00ea35 | 855 | start = c + 1; |
4b11111a MS |
856 | length = currlength = |
857 | (((laarr[c + 1].extLength & | |
858 | UDF_EXTENT_LENGTH_MASK) + | |
859 | inode->i_sb->s_blocksize - 1) >> | |
860 | inode->i_sb->s_blocksize_bits); | |
861 | } else | |
1da177e4 LT |
862 | start = c; |
863 | } | |
864 | ||
cb00ea35 CG |
865 | for (i = start + 1; i <= *endnum; i++) { |
866 | if (i == *endnum) { | |
1da177e4 LT |
867 | if (lastblock) |
868 | length += UDF_DEFAULT_PREALLOC_BLOCKS; | |
4b11111a MS |
869 | } else if ((laarr[i].extLength >> 30) == |
870 | (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) { | |
871 | length += (((laarr[i].extLength & | |
872 | UDF_EXTENT_LENGTH_MASK) + | |
873 | inode->i_sb->s_blocksize - 1) >> | |
874 | inode->i_sb->s_blocksize_bits); | |
875 | } else | |
1da177e4 LT |
876 | break; |
877 | } | |
878 | ||
cb00ea35 | 879 | if (length) { |
1da177e4 | 880 | int next = laarr[start].extLocation.logicalBlockNum + |
28de7948 | 881 | (((laarr[start].extLength & UDF_EXTENT_LENGTH_MASK) + |
4b11111a MS |
882 | inode->i_sb->s_blocksize - 1) >> |
883 | inode->i_sb->s_blocksize_bits); | |
1da177e4 | 884 | int numalloc = udf_prealloc_blocks(inode->i_sb, inode, |
4b11111a MS |
885 | laarr[start].extLocation.partitionReferenceNum, |
886 | next, (UDF_DEFAULT_PREALLOC_BLOCKS > length ? | |
887 | length : UDF_DEFAULT_PREALLOC_BLOCKS) - | |
888 | currlength); | |
28de7948 | 889 | if (numalloc) { |
4b11111a | 890 | if (start == (c + 1)) |
1da177e4 | 891 | laarr[start].extLength += |
4b11111a MS |
892 | (numalloc << |
893 | inode->i_sb->s_blocksize_bits); | |
894 | else { | |
cb00ea35 | 895 | memmove(&laarr[c + 2], &laarr[c + 1], |
5ca4e4be | 896 | sizeof(struct long_ad) * (*endnum - (c + 1))); |
cb00ea35 CG |
897 | (*endnum)++; |
898 | laarr[c + 1].extLocation.logicalBlockNum = next; | |
899 | laarr[c + 1].extLocation.partitionReferenceNum = | |
4b11111a MS |
900 | laarr[c].extLocation. |
901 | partitionReferenceNum; | |
902 | laarr[c + 1].extLength = | |
903 | EXT_NOT_RECORDED_ALLOCATED | | |
904 | (numalloc << | |
905 | inode->i_sb->s_blocksize_bits); | |
cb00ea35 | 906 | start = c + 1; |
1da177e4 LT |
907 | } |
908 | ||
cb00ea35 | 909 | for (i = start + 1; numalloc && i < *endnum; i++) { |
4b11111a MS |
910 | int elen = ((laarr[i].extLength & |
911 | UDF_EXTENT_LENGTH_MASK) + | |
912 | inode->i_sb->s_blocksize - 1) >> | |
913 | inode->i_sb->s_blocksize_bits; | |
1da177e4 | 914 | |
cb00ea35 | 915 | if (elen > numalloc) { |
1da177e4 | 916 | laarr[i].extLength -= |
4b11111a MS |
917 | (numalloc << |
918 | inode->i_sb->s_blocksize_bits); | |
1da177e4 | 919 | numalloc = 0; |
cb00ea35 | 920 | } else { |
1da177e4 | 921 | numalloc -= elen; |
cb00ea35 | 922 | if (*endnum > (i + 1)) |
4b11111a MS |
923 | memmove(&laarr[i], |
924 | &laarr[i + 1], | |
5ca4e4be | 925 | sizeof(struct long_ad) * |
4b11111a | 926 | (*endnum - (i + 1))); |
cb00ea35 CG |
927 | i--; |
928 | (*endnum)--; | |
1da177e4 LT |
929 | } |
930 | } | |
c0b34438 | 931 | UDF_I(inode)->i_lenExtents += |
4b11111a | 932 | numalloc << inode->i_sb->s_blocksize_bits; |
1da177e4 LT |
933 | } |
934 | } | |
935 | } | |
936 | ||
937 | static void udf_merge_extents(struct inode *inode, | |
5ca4e4be | 938 | struct kernel_long_ad laarr[EXTENT_MERGE_SIZE], |
cb00ea35 | 939 | int *endnum) |
1da177e4 LT |
940 | { |
941 | int i; | |
4b11111a MS |
942 | unsigned long blocksize = inode->i_sb->s_blocksize; |
943 | unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; | |
1da177e4 | 944 | |
cb00ea35 | 945 | for (i = 0; i < (*endnum - 1); i++) { |
5ca4e4be PE |
946 | struct kernel_long_ad *li /*l[i]*/ = &laarr[i]; |
947 | struct kernel_long_ad *lip1 /*l[i plus 1]*/ = &laarr[i + 1]; | |
4b11111a MS |
948 | |
949 | if (((li->extLength >> 30) == (lip1->extLength >> 30)) && | |
950 | (((li->extLength >> 30) == | |
951 | (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) || | |
952 | ((lip1->extLocation.logicalBlockNum - | |
953 | li->extLocation.logicalBlockNum) == | |
954 | (((li->extLength & UDF_EXTENT_LENGTH_MASK) + | |
955 | blocksize - 1) >> blocksize_bits)))) { | |
956 | ||
957 | if (((li->extLength & UDF_EXTENT_LENGTH_MASK) + | |
958 | (lip1->extLength & UDF_EXTENT_LENGTH_MASK) + | |
959 | blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) { | |
960 | lip1->extLength = (lip1->extLength - | |
961 | (li->extLength & | |
962 | UDF_EXTENT_LENGTH_MASK) + | |
963 | UDF_EXTENT_LENGTH_MASK) & | |
964 | ~(blocksize - 1); | |
965 | li->extLength = (li->extLength & | |
966 | UDF_EXTENT_FLAG_MASK) + | |
967 | (UDF_EXTENT_LENGTH_MASK + 1) - | |
968 | blocksize; | |
969 | lip1->extLocation.logicalBlockNum = | |
970 | li->extLocation.logicalBlockNum + | |
971 | ((li->extLength & | |
972 | UDF_EXTENT_LENGTH_MASK) >> | |
973 | blocksize_bits); | |
974 | } else { | |
975 | li->extLength = lip1->extLength + | |
976 | (((li->extLength & | |
977 | UDF_EXTENT_LENGTH_MASK) + | |
978 | blocksize - 1) & ~(blocksize - 1)); | |
979 | if (*endnum > (i + 2)) | |
980 | memmove(&laarr[i + 1], &laarr[i + 2], | |
5ca4e4be | 981 | sizeof(struct long_ad) * |
4b11111a MS |
982 | (*endnum - (i + 2))); |
983 | i--; | |
984 | (*endnum)--; | |
1da177e4 | 985 | } |
4b11111a MS |
986 | } else if (((li->extLength >> 30) == |
987 | (EXT_NOT_RECORDED_ALLOCATED >> 30)) && | |
988 | ((lip1->extLength >> 30) == | |
989 | (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))) { | |
97e961fd | 990 | udf_free_blocks(inode->i_sb, inode, &li->extLocation, 0, |
4b11111a MS |
991 | ((li->extLength & |
992 | UDF_EXTENT_LENGTH_MASK) + | |
993 | blocksize - 1) >> blocksize_bits); | |
994 | li->extLocation.logicalBlockNum = 0; | |
995 | li->extLocation.partitionReferenceNum = 0; | |
996 | ||
997 | if (((li->extLength & UDF_EXTENT_LENGTH_MASK) + | |
998 | (lip1->extLength & UDF_EXTENT_LENGTH_MASK) + | |
999 | blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) { | |
1000 | lip1->extLength = (lip1->extLength - | |
1001 | (li->extLength & | |
1002 | UDF_EXTENT_LENGTH_MASK) + | |
1003 | UDF_EXTENT_LENGTH_MASK) & | |
1004 | ~(blocksize - 1); | |
1005 | li->extLength = (li->extLength & | |
1006 | UDF_EXTENT_FLAG_MASK) + | |
1007 | (UDF_EXTENT_LENGTH_MASK + 1) - | |
1008 | blocksize; | |
cb00ea35 | 1009 | } else { |
4b11111a MS |
1010 | li->extLength = lip1->extLength + |
1011 | (((li->extLength & | |
1012 | UDF_EXTENT_LENGTH_MASK) + | |
1013 | blocksize - 1) & ~(blocksize - 1)); | |
cb00ea35 CG |
1014 | if (*endnum > (i + 2)) |
1015 | memmove(&laarr[i + 1], &laarr[i + 2], | |
5ca4e4be | 1016 | sizeof(struct long_ad) * |
4b11111a | 1017 | (*endnum - (i + 2))); |
cb00ea35 CG |
1018 | i--; |
1019 | (*endnum)--; | |
1da177e4 | 1020 | } |
4b11111a MS |
1021 | } else if ((li->extLength >> 30) == |
1022 | (EXT_NOT_RECORDED_ALLOCATED >> 30)) { | |
1023 | udf_free_blocks(inode->i_sb, inode, | |
97e961fd | 1024 | &li->extLocation, 0, |
4b11111a MS |
1025 | ((li->extLength & |
1026 | UDF_EXTENT_LENGTH_MASK) + | |
1027 | blocksize - 1) >> blocksize_bits); | |
1028 | li->extLocation.logicalBlockNum = 0; | |
1029 | li->extLocation.partitionReferenceNum = 0; | |
1030 | li->extLength = (li->extLength & | |
1031 | UDF_EXTENT_LENGTH_MASK) | | |
1032 | EXT_NOT_RECORDED_NOT_ALLOCATED; | |
1da177e4 LT |
1033 | } |
1034 | } | |
1035 | } | |
1036 | ||
1037 | static void udf_update_extents(struct inode *inode, | |
5ca4e4be | 1038 | struct kernel_long_ad laarr[EXTENT_MERGE_SIZE], |
cb00ea35 CG |
1039 | int startnum, int endnum, |
1040 | struct extent_position *epos) | |
1da177e4 LT |
1041 | { |
1042 | int start = 0, i; | |
5ca4e4be | 1043 | struct kernel_lb_addr tmploc; |
1da177e4 LT |
1044 | uint32_t tmplen; |
1045 | ||
cb00ea35 CG |
1046 | if (startnum > endnum) { |
1047 | for (i = 0; i < (startnum - endnum); i++) | |
ff116fc8 | 1048 | udf_delete_aext(inode, *epos, laarr[i].extLocation, |
cb00ea35 CG |
1049 | laarr[i].extLength); |
1050 | } else if (startnum < endnum) { | |
1051 | for (i = 0; i < (endnum - startnum); i++) { | |
ff116fc8 | 1052 | udf_insert_aext(inode, *epos, laarr[i].extLocation, |
cb00ea35 | 1053 | laarr[i].extLength); |
ff116fc8 | 1054 | udf_next_aext(inode, epos, &laarr[i].extLocation, |
cb00ea35 CG |
1055 | &laarr[i].extLength, 1); |
1056 | start++; | |
1da177e4 LT |
1057 | } |
1058 | } | |
1059 | ||
cb00ea35 | 1060 | for (i = start; i < endnum; i++) { |
ff116fc8 | 1061 | udf_next_aext(inode, epos, &tmploc, &tmplen, 0); |
97e961fd | 1062 | udf_write_aext(inode, epos, &laarr[i].extLocation, |
cb00ea35 | 1063 | laarr[i].extLength, 1); |
1da177e4 LT |
1064 | } |
1065 | } | |
1066 | ||
cb00ea35 CG |
1067 | struct buffer_head *udf_bread(struct inode *inode, int block, |
1068 | int create, int *err) | |
1da177e4 | 1069 | { |
cb00ea35 | 1070 | struct buffer_head *bh = NULL; |
1da177e4 LT |
1071 | |
1072 | bh = udf_getblk(inode, block, create, err); | |
1073 | if (!bh) | |
1074 | return NULL; | |
1075 | ||
1076 | if (buffer_uptodate(bh)) | |
1077 | return bh; | |
28de7948 | 1078 | |
1da177e4 | 1079 | ll_rw_block(READ, 1, &bh); |
28de7948 | 1080 | |
1da177e4 LT |
1081 | wait_on_buffer(bh); |
1082 | if (buffer_uptodate(bh)) | |
1083 | return bh; | |
28de7948 | 1084 | |
1da177e4 LT |
1085 | brelse(bh); |
1086 | *err = -EIO; | |
1087 | return NULL; | |
1088 | } | |
1089 | ||
7e49b6f2 | 1090 | int udf_setsize(struct inode *inode, loff_t newsize) |
1da177e4 | 1091 | { |
1da177e4 | 1092 | int err; |
48d6d8ff | 1093 | struct udf_inode_info *iinfo; |
7e49b6f2 | 1094 | int bsize = 1 << inode->i_blkbits; |
1da177e4 LT |
1095 | |
1096 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || | |
cb00ea35 | 1097 | S_ISLNK(inode->i_mode))) |
7e49b6f2 | 1098 | return -EINVAL; |
1da177e4 | 1099 | if (IS_APPEND(inode) || IS_IMMUTABLE(inode)) |
7e49b6f2 | 1100 | return -EPERM; |
1da177e4 | 1101 | |
48d6d8ff | 1102 | iinfo = UDF_I(inode); |
7e49b6f2 | 1103 | if (newsize > inode->i_size) { |
4d0fb621 | 1104 | down_write(&iinfo->i_data_sem); |
7e49b6f2 JK |
1105 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { |
1106 | if (bsize < | |
1107 | (udf_file_entry_alloc_offset(inode) + newsize)) { | |
1108 | err = udf_expand_file_adinicb(inode); | |
1109 | if (err) { | |
1110 | up_write(&iinfo->i_data_sem); | |
1111 | return err; | |
1112 | } | |
4b11111a | 1113 | } else |
7e49b6f2 JK |
1114 | iinfo->i_lenAlloc = newsize; |
1115 | } | |
1116 | err = udf_extend_file(inode, newsize); | |
1117 | if (err) { | |
1118 | up_write(&iinfo->i_data_sem); | |
1119 | return err; | |
1da177e4 | 1120 | } |
7e49b6f2 | 1121 | truncate_setsize(inode, newsize); |
4d0fb621 | 1122 | up_write(&iinfo->i_data_sem); |
cb00ea35 | 1123 | } else { |
7e49b6f2 JK |
1124 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { |
1125 | down_write(&iinfo->i_data_sem); | |
1126 | memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr + newsize, | |
1127 | 0x00, bsize - newsize - | |
1128 | udf_file_entry_alloc_offset(inode)); | |
1129 | iinfo->i_lenAlloc = newsize; | |
1130 | truncate_setsize(inode, newsize); | |
1131 | up_write(&iinfo->i_data_sem); | |
1132 | goto update_time; | |
1133 | } | |
1134 | err = block_truncate_page(inode->i_mapping, newsize, | |
1135 | udf_get_block); | |
1136 | if (err) | |
1137 | return err; | |
4d0fb621 | 1138 | down_write(&iinfo->i_data_sem); |
7e49b6f2 | 1139 | truncate_setsize(inode, newsize); |
1da177e4 | 1140 | udf_truncate_extents(inode); |
4d0fb621 | 1141 | up_write(&iinfo->i_data_sem); |
647bd61a | 1142 | } |
7e49b6f2 | 1143 | update_time: |
1da177e4 LT |
1144 | inode->i_mtime = inode->i_ctime = current_fs_time(inode->i_sb); |
1145 | if (IS_SYNC(inode)) | |
cb00ea35 | 1146 | udf_sync_inode(inode); |
1da177e4 LT |
1147 | else |
1148 | mark_inode_dirty(inode); | |
7e49b6f2 | 1149 | return 0; |
1da177e4 LT |
1150 | } |
1151 | ||
cb00ea35 | 1152 | static void __udf_read_inode(struct inode *inode) |
1da177e4 LT |
1153 | { |
1154 | struct buffer_head *bh = NULL; | |
1155 | struct fileEntry *fe; | |
1156 | uint16_t ident; | |
48d6d8ff | 1157 | struct udf_inode_info *iinfo = UDF_I(inode); |
1da177e4 LT |
1158 | |
1159 | /* | |
1160 | * Set defaults, but the inode is still incomplete! | |
1161 | * Note: get_new_inode() sets the following on a new inode: | |
1162 | * i_sb = sb | |
1163 | * i_no = ino | |
1164 | * i_flags = sb->s_flags | |
1165 | * i_state = 0 | |
1166 | * clean_inode(): zero fills and sets | |
1167 | * i_count = 1 | |
1168 | * i_nlink = 1 | |
1169 | * i_op = NULL; | |
1170 | */ | |
97e961fd | 1171 | bh = udf_read_ptagged(inode->i_sb, &iinfo->i_location, 0, &ident); |
cb00ea35 | 1172 | if (!bh) { |
1da177e4 | 1173 | printk(KERN_ERR "udf: udf_read_inode(ino %ld) failed !bh\n", |
cb00ea35 | 1174 | inode->i_ino); |
1da177e4 LT |
1175 | make_bad_inode(inode); |
1176 | return; | |
1177 | } | |
1178 | ||
1179 | if (ident != TAG_IDENT_FE && ident != TAG_IDENT_EFE && | |
cb00ea35 | 1180 | ident != TAG_IDENT_USE) { |
4b11111a MS |
1181 | printk(KERN_ERR "udf: udf_read_inode(ino %ld) " |
1182 | "failed ident=%d\n", inode->i_ino, ident); | |
3bf25cb4 | 1183 | brelse(bh); |
1da177e4 LT |
1184 | make_bad_inode(inode); |
1185 | return; | |
1186 | } | |
1187 | ||
1188 | fe = (struct fileEntry *)bh->b_data; | |
1189 | ||
5e0f0017 | 1190 | if (fe->icbTag.strategyType == cpu_to_le16(4096)) { |
1ab92785 | 1191 | struct buffer_head *ibh; |
1da177e4 | 1192 | |
97e961fd | 1193 | ibh = udf_read_ptagged(inode->i_sb, &iinfo->i_location, 1, |
4b11111a | 1194 | &ident); |
1ab92785 | 1195 | if (ident == TAG_IDENT_IE && ibh) { |
1196 | struct buffer_head *nbh = NULL; | |
5ca4e4be | 1197 | struct kernel_lb_addr loc; |
1ab92785 | 1198 | struct indirectEntry *ie; |
1199 | ||
1200 | ie = (struct indirectEntry *)ibh->b_data; | |
1201 | loc = lelb_to_cpu(ie->indirectICB.extLocation); | |
1202 | ||
1203 | if (ie->indirectICB.extLength && | |
97e961fd | 1204 | (nbh = udf_read_ptagged(inode->i_sb, &loc, 0, |
1ab92785 | 1205 | &ident))) { |
1206 | if (ident == TAG_IDENT_FE || | |
1207 | ident == TAG_IDENT_EFE) { | |
1208 | memcpy(&iinfo->i_location, | |
1209 | &loc, | |
5ca4e4be | 1210 | sizeof(struct kernel_lb_addr)); |
1ab92785 | 1211 | brelse(bh); |
3bf25cb4 | 1212 | brelse(ibh); |
1ab92785 | 1213 | brelse(nbh); |
1214 | __udf_read_inode(inode); | |
1215 | return; | |
28de7948 | 1216 | } |
1ab92785 | 1217 | brelse(nbh); |
1da177e4 | 1218 | } |
28de7948 | 1219 | } |
1ab92785 | 1220 | brelse(ibh); |
5e0f0017 | 1221 | } else if (fe->icbTag.strategyType != cpu_to_le16(4)) { |
1da177e4 | 1222 | printk(KERN_ERR "udf: unsupported strategy type: %d\n", |
cb00ea35 | 1223 | le16_to_cpu(fe->icbTag.strategyType)); |
3bf25cb4 | 1224 | brelse(bh); |
1da177e4 LT |
1225 | make_bad_inode(inode); |
1226 | return; | |
1227 | } | |
1228 | udf_fill_inode(inode, bh); | |
31170b6a | 1229 | |
3bf25cb4 | 1230 | brelse(bh); |
1da177e4 LT |
1231 | } |
1232 | ||
1233 | static void udf_fill_inode(struct inode *inode, struct buffer_head *bh) | |
1234 | { | |
1235 | struct fileEntry *fe; | |
1236 | struct extendedFileEntry *efe; | |
1da177e4 | 1237 | int offset; |
6c79e987 | 1238 | struct udf_sb_info *sbi = UDF_SB(inode->i_sb); |
48d6d8ff | 1239 | struct udf_inode_info *iinfo = UDF_I(inode); |
1da177e4 LT |
1240 | |
1241 | fe = (struct fileEntry *)bh->b_data; | |
1242 | efe = (struct extendedFileEntry *)bh->b_data; | |
1243 | ||
5e0f0017 | 1244 | if (fe->icbTag.strategyType == cpu_to_le16(4)) |
48d6d8ff | 1245 | iinfo->i_strat4096 = 0; |
5e0f0017 | 1246 | else /* if (fe->icbTag.strategyType == cpu_to_le16(4096)) */ |
48d6d8ff | 1247 | iinfo->i_strat4096 = 1; |
1da177e4 | 1248 | |
48d6d8ff | 1249 | iinfo->i_alloc_type = le16_to_cpu(fe->icbTag.flags) & |
4b11111a | 1250 | ICBTAG_FLAG_AD_MASK; |
48d6d8ff MS |
1251 | iinfo->i_unique = 0; |
1252 | iinfo->i_lenEAttr = 0; | |
1253 | iinfo->i_lenExtents = 0; | |
1254 | iinfo->i_lenAlloc = 0; | |
1255 | iinfo->i_next_alloc_block = 0; | |
1256 | iinfo->i_next_alloc_goal = 0; | |
5e0f0017 | 1257 | if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_EFE)) { |
48d6d8ff MS |
1258 | iinfo->i_efe = 1; |
1259 | iinfo->i_use = 0; | |
4b11111a MS |
1260 | if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize - |
1261 | sizeof(struct extendedFileEntry))) { | |
647bd61a CG |
1262 | make_bad_inode(inode); |
1263 | return; | |
1264 | } | |
48d6d8ff | 1265 | memcpy(iinfo->i_ext.i_data, |
4b11111a MS |
1266 | bh->b_data + sizeof(struct extendedFileEntry), |
1267 | inode->i_sb->s_blocksize - | |
1268 | sizeof(struct extendedFileEntry)); | |
5e0f0017 | 1269 | } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_FE)) { |
48d6d8ff MS |
1270 | iinfo->i_efe = 0; |
1271 | iinfo->i_use = 0; | |
4b11111a MS |
1272 | if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize - |
1273 | sizeof(struct fileEntry))) { | |
647bd61a CG |
1274 | make_bad_inode(inode); |
1275 | return; | |
1276 | } | |
48d6d8ff | 1277 | memcpy(iinfo->i_ext.i_data, |
c0b34438 | 1278 | bh->b_data + sizeof(struct fileEntry), |
cb00ea35 | 1279 | inode->i_sb->s_blocksize - sizeof(struct fileEntry)); |
5e0f0017 | 1280 | } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_USE)) { |
48d6d8ff MS |
1281 | iinfo->i_efe = 0; |
1282 | iinfo->i_use = 1; | |
1283 | iinfo->i_lenAlloc = le32_to_cpu( | |
4b11111a MS |
1284 | ((struct unallocSpaceEntry *)bh->b_data)-> |
1285 | lengthAllocDescs); | |
1286 | if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize - | |
1287 | sizeof(struct unallocSpaceEntry))) { | |
647bd61a CG |
1288 | make_bad_inode(inode); |
1289 | return; | |
1290 | } | |
48d6d8ff | 1291 | memcpy(iinfo->i_ext.i_data, |
4b11111a MS |
1292 | bh->b_data + sizeof(struct unallocSpaceEntry), |
1293 | inode->i_sb->s_blocksize - | |
1294 | sizeof(struct unallocSpaceEntry)); | |
1da177e4 LT |
1295 | return; |
1296 | } | |
1297 | ||
c03cad24 | 1298 | read_lock(&sbi->s_cred_lock); |
1da177e4 | 1299 | inode->i_uid = le32_to_cpu(fe->uid); |
ca76d2d8 CG |
1300 | if (inode->i_uid == -1 || |
1301 | UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_IGNORE) || | |
1302 | UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_SET)) | |
4d6660eb | 1303 | inode->i_uid = UDF_SB(inode->i_sb)->s_uid; |
1da177e4 LT |
1304 | |
1305 | inode->i_gid = le32_to_cpu(fe->gid); | |
ca76d2d8 CG |
1306 | if (inode->i_gid == -1 || |
1307 | UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_IGNORE) || | |
1308 | UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_SET)) | |
4d6660eb | 1309 | inode->i_gid = UDF_SB(inode->i_sb)->s_gid; |
1da177e4 | 1310 | |
7ac9bcd5 | 1311 | if (fe->icbTag.fileType != ICBTAG_FILE_TYPE_DIRECTORY && |
87bc730c | 1312 | sbi->s_fmode != UDF_INVALID_MODE) |
7ac9bcd5 MS |
1313 | inode->i_mode = sbi->s_fmode; |
1314 | else if (fe->icbTag.fileType == ICBTAG_FILE_TYPE_DIRECTORY && | |
87bc730c | 1315 | sbi->s_dmode != UDF_INVALID_MODE) |
7ac9bcd5 MS |
1316 | inode->i_mode = sbi->s_dmode; |
1317 | else | |
1318 | inode->i_mode = udf_convert_permissions(fe); | |
1319 | inode->i_mode &= ~sbi->s_umask; | |
c03cad24 JK |
1320 | read_unlock(&sbi->s_cred_lock); |
1321 | ||
1322 | inode->i_nlink = le16_to_cpu(fe->fileLinkCount); | |
1323 | if (!inode->i_nlink) | |
1324 | inode->i_nlink = 1; | |
1325 | ||
1326 | inode->i_size = le64_to_cpu(fe->informationLength); | |
1327 | iinfo->i_lenExtents = inode->i_size; | |
1da177e4 | 1328 | |
48d6d8ff | 1329 | if (iinfo->i_efe == 0) { |
1da177e4 | 1330 | inode->i_blocks = le64_to_cpu(fe->logicalBlocksRecorded) << |
28de7948 | 1331 | (inode->i_sb->s_blocksize_bits - 9); |
1da177e4 | 1332 | |
56774805 | 1333 | if (!udf_disk_stamp_to_time(&inode->i_atime, fe->accessTime)) |
cbf5676a | 1334 | inode->i_atime = sbi->s_record_time; |
1335 | ||
56774805 MS |
1336 | if (!udf_disk_stamp_to_time(&inode->i_mtime, |
1337 | fe->modificationTime)) | |
cbf5676a | 1338 | inode->i_mtime = sbi->s_record_time; |
1339 | ||
56774805 | 1340 | if (!udf_disk_stamp_to_time(&inode->i_ctime, fe->attrTime)) |
cbf5676a | 1341 | inode->i_ctime = sbi->s_record_time; |
1da177e4 | 1342 | |
48d6d8ff MS |
1343 | iinfo->i_unique = le64_to_cpu(fe->uniqueID); |
1344 | iinfo->i_lenEAttr = le32_to_cpu(fe->lengthExtendedAttr); | |
1345 | iinfo->i_lenAlloc = le32_to_cpu(fe->lengthAllocDescs); | |
1346 | offset = sizeof(struct fileEntry) + iinfo->i_lenEAttr; | |
cb00ea35 | 1347 | } else { |
647bd61a | 1348 | inode->i_blocks = le64_to_cpu(efe->logicalBlocksRecorded) << |
cb00ea35 | 1349 | (inode->i_sb->s_blocksize_bits - 9); |
1da177e4 | 1350 | |
56774805 | 1351 | if (!udf_disk_stamp_to_time(&inode->i_atime, efe->accessTime)) |
cbf5676a | 1352 | inode->i_atime = sbi->s_record_time; |
1353 | ||
56774805 MS |
1354 | if (!udf_disk_stamp_to_time(&inode->i_mtime, |
1355 | efe->modificationTime)) | |
cbf5676a | 1356 | inode->i_mtime = sbi->s_record_time; |
1357 | ||
56774805 | 1358 | if (!udf_disk_stamp_to_time(&iinfo->i_crtime, efe->createTime)) |
cbf5676a | 1359 | iinfo->i_crtime = sbi->s_record_time; |
1360 | ||
56774805 | 1361 | if (!udf_disk_stamp_to_time(&inode->i_ctime, efe->attrTime)) |
cbf5676a | 1362 | inode->i_ctime = sbi->s_record_time; |
1da177e4 | 1363 | |
48d6d8ff MS |
1364 | iinfo->i_unique = le64_to_cpu(efe->uniqueID); |
1365 | iinfo->i_lenEAttr = le32_to_cpu(efe->lengthExtendedAttr); | |
1366 | iinfo->i_lenAlloc = le32_to_cpu(efe->lengthAllocDescs); | |
4b11111a | 1367 | offset = sizeof(struct extendedFileEntry) + |
48d6d8ff | 1368 | iinfo->i_lenEAttr; |
1da177e4 LT |
1369 | } |
1370 | ||
cb00ea35 CG |
1371 | switch (fe->icbTag.fileType) { |
1372 | case ICBTAG_FILE_TYPE_DIRECTORY: | |
28de7948 CG |
1373 | inode->i_op = &udf_dir_inode_operations; |
1374 | inode->i_fop = &udf_dir_operations; | |
1375 | inode->i_mode |= S_IFDIR; | |
1376 | inc_nlink(inode); | |
1377 | break; | |
cb00ea35 CG |
1378 | case ICBTAG_FILE_TYPE_REALTIME: |
1379 | case ICBTAG_FILE_TYPE_REGULAR: | |
1380 | case ICBTAG_FILE_TYPE_UNDEF: | |
742e1795 | 1381 | case ICBTAG_FILE_TYPE_VAT20: |
48d6d8ff | 1382 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
28de7948 CG |
1383 | inode->i_data.a_ops = &udf_adinicb_aops; |
1384 | else | |
1385 | inode->i_data.a_ops = &udf_aops; | |
1386 | inode->i_op = &udf_file_inode_operations; | |
1387 | inode->i_fop = &udf_file_operations; | |
1388 | inode->i_mode |= S_IFREG; | |
1389 | break; | |
cb00ea35 | 1390 | case ICBTAG_FILE_TYPE_BLOCK: |
28de7948 CG |
1391 | inode->i_mode |= S_IFBLK; |
1392 | break; | |
cb00ea35 | 1393 | case ICBTAG_FILE_TYPE_CHAR: |
28de7948 CG |
1394 | inode->i_mode |= S_IFCHR; |
1395 | break; | |
cb00ea35 | 1396 | case ICBTAG_FILE_TYPE_FIFO: |
28de7948 CG |
1397 | init_special_inode(inode, inode->i_mode | S_IFIFO, 0); |
1398 | break; | |
cb00ea35 | 1399 | case ICBTAG_FILE_TYPE_SOCKET: |
28de7948 CG |
1400 | init_special_inode(inode, inode->i_mode | S_IFSOCK, 0); |
1401 | break; | |
cb00ea35 | 1402 | case ICBTAG_FILE_TYPE_SYMLINK: |
28de7948 | 1403 | inode->i_data.a_ops = &udf_symlink_aops; |
c15d0fc0 | 1404 | inode->i_op = &udf_symlink_inode_operations; |
28de7948 CG |
1405 | inode->i_mode = S_IFLNK | S_IRWXUGO; |
1406 | break; | |
bfb257a5 JK |
1407 | case ICBTAG_FILE_TYPE_MAIN: |
1408 | udf_debug("METADATA FILE-----\n"); | |
1409 | break; | |
1410 | case ICBTAG_FILE_TYPE_MIRROR: | |
1411 | udf_debug("METADATA MIRROR FILE-----\n"); | |
1412 | break; | |
1413 | case ICBTAG_FILE_TYPE_BITMAP: | |
1414 | udf_debug("METADATA BITMAP FILE-----\n"); | |
1415 | break; | |
cb00ea35 | 1416 | default: |
4b11111a MS |
1417 | printk(KERN_ERR "udf: udf_fill_inode(ino %ld) failed unknown " |
1418 | "file type=%d\n", inode->i_ino, | |
1419 | fe->icbTag.fileType); | |
28de7948 CG |
1420 | make_bad_inode(inode); |
1421 | return; | |
1da177e4 | 1422 | } |
cb00ea35 | 1423 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { |
4b11111a MS |
1424 | struct deviceSpec *dsea = |
1425 | (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1); | |
cb00ea35 CG |
1426 | if (dsea) { |
1427 | init_special_inode(inode, inode->i_mode, | |
4b11111a MS |
1428 | MKDEV(le32_to_cpu(dsea->majorDeviceIdent), |
1429 | le32_to_cpu(dsea->minorDeviceIdent))); | |
1da177e4 | 1430 | /* Developer ID ??? */ |
4b11111a | 1431 | } else |
1da177e4 | 1432 | make_bad_inode(inode); |
1da177e4 LT |
1433 | } |
1434 | } | |
1435 | ||
647bd61a CG |
1436 | static int udf_alloc_i_data(struct inode *inode, size_t size) |
1437 | { | |
48d6d8ff MS |
1438 | struct udf_inode_info *iinfo = UDF_I(inode); |
1439 | iinfo->i_ext.i_data = kmalloc(size, GFP_KERNEL); | |
647bd61a | 1440 | |
48d6d8ff | 1441 | if (!iinfo->i_ext.i_data) { |
4b11111a MS |
1442 | printk(KERN_ERR "udf:udf_alloc_i_data (ino %ld) " |
1443 | "no free memory\n", inode->i_ino); | |
647bd61a CG |
1444 | return -ENOMEM; |
1445 | } | |
1446 | ||
1447 | return 0; | |
1448 | } | |
1449 | ||
cb00ea35 | 1450 | static mode_t udf_convert_permissions(struct fileEntry *fe) |
1da177e4 LT |
1451 | { |
1452 | mode_t mode; | |
1453 | uint32_t permissions; | |
1454 | uint32_t flags; | |
1455 | ||
1456 | permissions = le32_to_cpu(fe->permissions); | |
1457 | flags = le16_to_cpu(fe->icbTag.flags); | |
1458 | ||
4b11111a MS |
1459 | mode = ((permissions) & S_IRWXO) | |
1460 | ((permissions >> 2) & S_IRWXG) | | |
1461 | ((permissions >> 4) & S_IRWXU) | | |
1462 | ((flags & ICBTAG_FLAG_SETUID) ? S_ISUID : 0) | | |
1463 | ((flags & ICBTAG_FLAG_SETGID) ? S_ISGID : 0) | | |
1464 | ((flags & ICBTAG_FLAG_STICKY) ? S_ISVTX : 0); | |
1da177e4 LT |
1465 | |
1466 | return mode; | |
1467 | } | |
1468 | ||
a9185b41 | 1469 | int udf_write_inode(struct inode *inode, struct writeback_control *wbc) |
1da177e4 | 1470 | { |
49521de1 | 1471 | return udf_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL); |
1da177e4 LT |
1472 | } |
1473 | ||
49521de1 | 1474 | static int udf_sync_inode(struct inode *inode) |
1da177e4 LT |
1475 | { |
1476 | return udf_update_inode(inode, 1); | |
1477 | } | |
1478 | ||
cb00ea35 | 1479 | static int udf_update_inode(struct inode *inode, int do_sync) |
1da177e4 LT |
1480 | { |
1481 | struct buffer_head *bh = NULL; | |
1482 | struct fileEntry *fe; | |
1483 | struct extendedFileEntry *efe; | |
1484 | uint32_t udfperms; | |
1485 | uint16_t icbflags; | |
1486 | uint16_t crclen; | |
1da177e4 | 1487 | int err = 0; |
6c79e987 | 1488 | struct udf_sb_info *sbi = UDF_SB(inode->i_sb); |
4b11111a | 1489 | unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; |
48d6d8ff | 1490 | struct udf_inode_info *iinfo = UDF_I(inode); |
1da177e4 | 1491 | |
5833ded9 JK |
1492 | bh = udf_tgetblk(inode->i_sb, |
1493 | udf_get_lb_pblock(inode->i_sb, &iinfo->i_location, 0)); | |
cb00ea35 | 1494 | if (!bh) { |
aae917cd JK |
1495 | udf_debug("getblk failure\n"); |
1496 | return -ENOMEM; | |
1da177e4 LT |
1497 | } |
1498 | ||
aae917cd JK |
1499 | lock_buffer(bh); |
1500 | memset(bh->b_data, 0, inode->i_sb->s_blocksize); | |
1da177e4 LT |
1501 | fe = (struct fileEntry *)bh->b_data; |
1502 | efe = (struct extendedFileEntry *)bh->b_data; | |
1503 | ||
aae917cd | 1504 | if (iinfo->i_use) { |
1da177e4 | 1505 | struct unallocSpaceEntry *use = |
28de7948 | 1506 | (struct unallocSpaceEntry *)bh->b_data; |
1da177e4 | 1507 | |
48d6d8ff | 1508 | use->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc); |
4b11111a | 1509 | memcpy(bh->b_data + sizeof(struct unallocSpaceEntry), |
48d6d8ff | 1510 | iinfo->i_ext.i_data, inode->i_sb->s_blocksize - |
4b11111a | 1511 | sizeof(struct unallocSpaceEntry)); |
aae917cd JK |
1512 | use->descTag.tagIdent = cpu_to_le16(TAG_IDENT_USE); |
1513 | use->descTag.tagLocation = | |
1514 | cpu_to_le32(iinfo->i_location.logicalBlockNum); | |
4b11111a | 1515 | crclen = sizeof(struct unallocSpaceEntry) + |
5ca4e4be | 1516 | iinfo->i_lenAlloc - sizeof(struct tag); |
1da177e4 | 1517 | use->descTag.descCRCLength = cpu_to_le16(crclen); |
f845fced | 1518 | use->descTag.descCRC = cpu_to_le16(crc_itu_t(0, (char *)use + |
5ca4e4be | 1519 | sizeof(struct tag), |
f845fced | 1520 | crclen)); |
3f2587bb | 1521 | use->descTag.tagChecksum = udf_tag_checksum(&use->descTag); |
1da177e4 | 1522 | |
aae917cd | 1523 | goto out; |
1da177e4 LT |
1524 | } |
1525 | ||
4d6660eb PS |
1526 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_FORGET)) |
1527 | fe->uid = cpu_to_le32(-1); | |
cb00ea35 CG |
1528 | else |
1529 | fe->uid = cpu_to_le32(inode->i_uid); | |
1da177e4 | 1530 | |
4d6660eb PS |
1531 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_FORGET)) |
1532 | fe->gid = cpu_to_le32(-1); | |
cb00ea35 CG |
1533 | else |
1534 | fe->gid = cpu_to_le32(inode->i_gid); | |
1da177e4 | 1535 | |
4b11111a MS |
1536 | udfperms = ((inode->i_mode & S_IRWXO)) | |
1537 | ((inode->i_mode & S_IRWXG) << 2) | | |
1538 | ((inode->i_mode & S_IRWXU) << 4); | |
1da177e4 | 1539 | |
4b11111a MS |
1540 | udfperms |= (le32_to_cpu(fe->permissions) & |
1541 | (FE_PERM_O_DELETE | FE_PERM_O_CHATTR | | |
1542 | FE_PERM_G_DELETE | FE_PERM_G_CHATTR | | |
1543 | FE_PERM_U_DELETE | FE_PERM_U_CHATTR)); | |
1da177e4 LT |
1544 | fe->permissions = cpu_to_le32(udfperms); |
1545 | ||
1546 | if (S_ISDIR(inode->i_mode)) | |
1547 | fe->fileLinkCount = cpu_to_le16(inode->i_nlink - 1); | |
1548 | else | |
1549 | fe->fileLinkCount = cpu_to_le16(inode->i_nlink); | |
1550 | ||
1551 | fe->informationLength = cpu_to_le64(inode->i_size); | |
1552 | ||
cb00ea35 | 1553 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { |
5ca4e4be | 1554 | struct regid *eid; |
28de7948 CG |
1555 | struct deviceSpec *dsea = |
1556 | (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1); | |
cb00ea35 | 1557 | if (!dsea) { |
1da177e4 | 1558 | dsea = (struct deviceSpec *) |
28de7948 CG |
1559 | udf_add_extendedattr(inode, |
1560 | sizeof(struct deviceSpec) + | |
5ca4e4be | 1561 | sizeof(struct regid), 12, 0x3); |
1da177e4 LT |
1562 | dsea->attrType = cpu_to_le32(12); |
1563 | dsea->attrSubtype = 1; | |
4b11111a MS |
1564 | dsea->attrLength = cpu_to_le32( |
1565 | sizeof(struct deviceSpec) + | |
5ca4e4be PE |
1566 | sizeof(struct regid)); |
1567 | dsea->impUseLength = cpu_to_le32(sizeof(struct regid)); | |
1da177e4 | 1568 | } |
5ca4e4be PE |
1569 | eid = (struct regid *)dsea->impUse; |
1570 | memset(eid, 0, sizeof(struct regid)); | |
1da177e4 LT |
1571 | strcpy(eid->ident, UDF_ID_DEVELOPER); |
1572 | eid->identSuffix[0] = UDF_OS_CLASS_UNIX; | |
1573 | eid->identSuffix[1] = UDF_OS_ID_LINUX; | |
1574 | dsea->majorDeviceIdent = cpu_to_le32(imajor(inode)); | |
1575 | dsea->minorDeviceIdent = cpu_to_le32(iminor(inode)); | |
1576 | } | |
1577 | ||
48d6d8ff | 1578 | if (iinfo->i_efe == 0) { |
c0b34438 | 1579 | memcpy(bh->b_data + sizeof(struct fileEntry), |
48d6d8ff | 1580 | iinfo->i_ext.i_data, |
cb00ea35 | 1581 | inode->i_sb->s_blocksize - sizeof(struct fileEntry)); |
28de7948 | 1582 | fe->logicalBlocksRecorded = cpu_to_le64( |
4b11111a MS |
1583 | (inode->i_blocks + (1 << (blocksize_bits - 9)) - 1) >> |
1584 | (blocksize_bits - 9)); | |
1da177e4 | 1585 | |
56774805 MS |
1586 | udf_time_to_disk_stamp(&fe->accessTime, inode->i_atime); |
1587 | udf_time_to_disk_stamp(&fe->modificationTime, inode->i_mtime); | |
1588 | udf_time_to_disk_stamp(&fe->attrTime, inode->i_ctime); | |
5ca4e4be | 1589 | memset(&(fe->impIdent), 0, sizeof(struct regid)); |
1da177e4 LT |
1590 | strcpy(fe->impIdent.ident, UDF_ID_DEVELOPER); |
1591 | fe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; | |
1592 | fe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; | |
48d6d8ff MS |
1593 | fe->uniqueID = cpu_to_le64(iinfo->i_unique); |
1594 | fe->lengthExtendedAttr = cpu_to_le32(iinfo->i_lenEAttr); | |
1595 | fe->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc); | |
1da177e4 LT |
1596 | fe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_FE); |
1597 | crclen = sizeof(struct fileEntry); | |
cb00ea35 | 1598 | } else { |
4b11111a | 1599 | memcpy(bh->b_data + sizeof(struct extendedFileEntry), |
48d6d8ff | 1600 | iinfo->i_ext.i_data, |
4b11111a MS |
1601 | inode->i_sb->s_blocksize - |
1602 | sizeof(struct extendedFileEntry)); | |
1da177e4 | 1603 | efe->objectSize = cpu_to_le64(inode->i_size); |
28de7948 | 1604 | efe->logicalBlocksRecorded = cpu_to_le64( |
4b11111a MS |
1605 | (inode->i_blocks + (1 << (blocksize_bits - 9)) - 1) >> |
1606 | (blocksize_bits - 9)); | |
1da177e4 | 1607 | |
48d6d8ff MS |
1608 | if (iinfo->i_crtime.tv_sec > inode->i_atime.tv_sec || |
1609 | (iinfo->i_crtime.tv_sec == inode->i_atime.tv_sec && | |
1610 | iinfo->i_crtime.tv_nsec > inode->i_atime.tv_nsec)) | |
1611 | iinfo->i_crtime = inode->i_atime; | |
4b11111a | 1612 | |
48d6d8ff MS |
1613 | if (iinfo->i_crtime.tv_sec > inode->i_mtime.tv_sec || |
1614 | (iinfo->i_crtime.tv_sec == inode->i_mtime.tv_sec && | |
1615 | iinfo->i_crtime.tv_nsec > inode->i_mtime.tv_nsec)) | |
1616 | iinfo->i_crtime = inode->i_mtime; | |
4b11111a | 1617 | |
48d6d8ff MS |
1618 | if (iinfo->i_crtime.tv_sec > inode->i_ctime.tv_sec || |
1619 | (iinfo->i_crtime.tv_sec == inode->i_ctime.tv_sec && | |
1620 | iinfo->i_crtime.tv_nsec > inode->i_ctime.tv_nsec)) | |
1621 | iinfo->i_crtime = inode->i_ctime; | |
1da177e4 | 1622 | |
56774805 MS |
1623 | udf_time_to_disk_stamp(&efe->accessTime, inode->i_atime); |
1624 | udf_time_to_disk_stamp(&efe->modificationTime, inode->i_mtime); | |
1625 | udf_time_to_disk_stamp(&efe->createTime, iinfo->i_crtime); | |
1626 | udf_time_to_disk_stamp(&efe->attrTime, inode->i_ctime); | |
1da177e4 | 1627 | |
5ca4e4be | 1628 | memset(&(efe->impIdent), 0, sizeof(struct regid)); |
1da177e4 LT |
1629 | strcpy(efe->impIdent.ident, UDF_ID_DEVELOPER); |
1630 | efe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; | |
1631 | efe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; | |
48d6d8ff MS |
1632 | efe->uniqueID = cpu_to_le64(iinfo->i_unique); |
1633 | efe->lengthExtendedAttr = cpu_to_le32(iinfo->i_lenEAttr); | |
1634 | efe->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc); | |
1da177e4 LT |
1635 | efe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_EFE); |
1636 | crclen = sizeof(struct extendedFileEntry); | |
1637 | } | |
48d6d8ff | 1638 | if (iinfo->i_strat4096) { |
1da177e4 LT |
1639 | fe->icbTag.strategyType = cpu_to_le16(4096); |
1640 | fe->icbTag.strategyParameter = cpu_to_le16(1); | |
1641 | fe->icbTag.numEntries = cpu_to_le16(2); | |
cb00ea35 | 1642 | } else { |
1da177e4 LT |
1643 | fe->icbTag.strategyType = cpu_to_le16(4); |
1644 | fe->icbTag.numEntries = cpu_to_le16(1); | |
1645 | } | |
1646 | ||
1647 | if (S_ISDIR(inode->i_mode)) | |
1648 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_DIRECTORY; | |
1649 | else if (S_ISREG(inode->i_mode)) | |
1650 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_REGULAR; | |
1651 | else if (S_ISLNK(inode->i_mode)) | |
1652 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_SYMLINK; | |
1653 | else if (S_ISBLK(inode->i_mode)) | |
1654 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_BLOCK; | |
1655 | else if (S_ISCHR(inode->i_mode)) | |
1656 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_CHAR; | |
1657 | else if (S_ISFIFO(inode->i_mode)) | |
1658 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_FIFO; | |
1659 | else if (S_ISSOCK(inode->i_mode)) | |
1660 | fe->icbTag.fileType = ICBTAG_FILE_TYPE_SOCKET; | |
1661 | ||
48d6d8ff | 1662 | icbflags = iinfo->i_alloc_type | |
28de7948 CG |
1663 | ((inode->i_mode & S_ISUID) ? ICBTAG_FLAG_SETUID : 0) | |
1664 | ((inode->i_mode & S_ISGID) ? ICBTAG_FLAG_SETGID : 0) | | |
1665 | ((inode->i_mode & S_ISVTX) ? ICBTAG_FLAG_STICKY : 0) | | |
1666 | (le16_to_cpu(fe->icbTag.flags) & | |
1667 | ~(ICBTAG_FLAG_AD_MASK | ICBTAG_FLAG_SETUID | | |
1668 | ICBTAG_FLAG_SETGID | ICBTAG_FLAG_STICKY)); | |
1da177e4 LT |
1669 | |
1670 | fe->icbTag.flags = cpu_to_le16(icbflags); | |
6c79e987 | 1671 | if (sbi->s_udfrev >= 0x0200) |
1da177e4 LT |
1672 | fe->descTag.descVersion = cpu_to_le16(3); |
1673 | else | |
1674 | fe->descTag.descVersion = cpu_to_le16(2); | |
6c79e987 | 1675 | fe->descTag.tagSerialNum = cpu_to_le16(sbi->s_serial_number); |
4b11111a | 1676 | fe->descTag.tagLocation = cpu_to_le32( |
48d6d8ff | 1677 | iinfo->i_location.logicalBlockNum); |
aae917cd | 1678 | crclen += iinfo->i_lenEAttr + iinfo->i_lenAlloc - sizeof(struct tag); |
1da177e4 | 1679 | fe->descTag.descCRCLength = cpu_to_le16(crclen); |
5ca4e4be | 1680 | fe->descTag.descCRC = cpu_to_le16(crc_itu_t(0, (char *)fe + sizeof(struct tag), |
f845fced | 1681 | crclen)); |
3f2587bb | 1682 | fe->descTag.tagChecksum = udf_tag_checksum(&fe->descTag); |
1da177e4 | 1683 | |
aae917cd | 1684 | out: |
5833ded9 | 1685 | set_buffer_uptodate(bh); |
aae917cd JK |
1686 | unlock_buffer(bh); |
1687 | ||
1da177e4 LT |
1688 | /* write the data blocks */ |
1689 | mark_buffer_dirty(bh); | |
cb00ea35 | 1690 | if (do_sync) { |
1da177e4 | 1691 | sync_dirty_buffer(bh); |
aae917cd | 1692 | if (buffer_write_io_error(bh)) { |
4b11111a MS |
1693 | printk(KERN_WARNING "IO error syncing udf inode " |
1694 | "[%s:%08lx]\n", inode->i_sb->s_id, | |
1695 | inode->i_ino); | |
1da177e4 LT |
1696 | err = -EIO; |
1697 | } | |
1698 | } | |
3bf25cb4 | 1699 | brelse(bh); |
28de7948 | 1700 | |
1da177e4 LT |
1701 | return err; |
1702 | } | |
1703 | ||
97e961fd | 1704 | struct inode *udf_iget(struct super_block *sb, struct kernel_lb_addr *ino) |
1da177e4 LT |
1705 | { |
1706 | unsigned long block = udf_get_lb_pblock(sb, ino, 0); | |
1707 | struct inode *inode = iget_locked(sb, block); | |
1708 | ||
1709 | if (!inode) | |
1710 | return NULL; | |
1711 | ||
1712 | if (inode->i_state & I_NEW) { | |
97e961fd | 1713 | memcpy(&UDF_I(inode)->i_location, ino, sizeof(struct kernel_lb_addr)); |
1da177e4 LT |
1714 | __udf_read_inode(inode); |
1715 | unlock_new_inode(inode); | |
1716 | } | |
1717 | ||
1718 | if (is_bad_inode(inode)) | |
1719 | goto out_iput; | |
1720 | ||
97e961fd PE |
1721 | if (ino->logicalBlockNum >= UDF_SB(sb)-> |
1722 | s_partmaps[ino->partitionReferenceNum].s_partition_len) { | |
1da177e4 | 1723 | udf_debug("block=%d, partition=%d out of range\n", |
97e961fd | 1724 | ino->logicalBlockNum, ino->partitionReferenceNum); |
1da177e4 LT |
1725 | make_bad_inode(inode); |
1726 | goto out_iput; | |
1727 | } | |
1728 | ||
1729 | return inode; | |
1730 | ||
28de7948 | 1731 | out_iput: |
1da177e4 LT |
1732 | iput(inode); |
1733 | return NULL; | |
1734 | } | |
1735 | ||
7e49b6f2 JK |
1736 | int udf_add_aext(struct inode *inode, struct extent_position *epos, |
1737 | struct kernel_lb_addr *eloc, uint32_t elen, int inc) | |
1da177e4 LT |
1738 | { |
1739 | int adsize; | |
5ca4e4be PE |
1740 | struct short_ad *sad = NULL; |
1741 | struct long_ad *lad = NULL; | |
1da177e4 | 1742 | struct allocExtDesc *aed; |
1da177e4 | 1743 | uint8_t *ptr; |
48d6d8ff | 1744 | struct udf_inode_info *iinfo = UDF_I(inode); |
1da177e4 | 1745 | |
ff116fc8 | 1746 | if (!epos->bh) |
48d6d8ff | 1747 | ptr = iinfo->i_ext.i_data + epos->offset - |
4b11111a | 1748 | udf_file_entry_alloc_offset(inode) + |
48d6d8ff | 1749 | iinfo->i_lenEAttr; |
1da177e4 | 1750 | else |
ff116fc8 | 1751 | ptr = epos->bh->b_data + epos->offset; |
1da177e4 | 1752 | |
48d6d8ff | 1753 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
5ca4e4be | 1754 | adsize = sizeof(struct short_ad); |
48d6d8ff | 1755 | else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
5ca4e4be | 1756 | adsize = sizeof(struct long_ad); |
1da177e4 | 1757 | else |
7e49b6f2 | 1758 | return -EIO; |
1da177e4 | 1759 | |
cb00ea35 | 1760 | if (epos->offset + (2 * adsize) > inode->i_sb->s_blocksize) { |
391e8bbd | 1761 | unsigned char *sptr, *dptr; |
1da177e4 LT |
1762 | struct buffer_head *nbh; |
1763 | int err, loffset; | |
5ca4e4be | 1764 | struct kernel_lb_addr obloc = epos->block; |
1da177e4 | 1765 | |
4b11111a MS |
1766 | epos->block.logicalBlockNum = udf_new_block(inode->i_sb, NULL, |
1767 | obloc.partitionReferenceNum, | |
1768 | obloc.logicalBlockNum, &err); | |
1769 | if (!epos->block.logicalBlockNum) | |
7e49b6f2 | 1770 | return -ENOSPC; |
4b11111a | 1771 | nbh = udf_tgetblk(inode->i_sb, udf_get_lb_pblock(inode->i_sb, |
97e961fd | 1772 | &epos->block, |
4b11111a MS |
1773 | 0)); |
1774 | if (!nbh) | |
7e49b6f2 | 1775 | return -EIO; |
1da177e4 LT |
1776 | lock_buffer(nbh); |
1777 | memset(nbh->b_data, 0x00, inode->i_sb->s_blocksize); | |
1778 | set_buffer_uptodate(nbh); | |
1779 | unlock_buffer(nbh); | |
1780 | mark_buffer_dirty_inode(nbh, inode); | |
1781 | ||
1782 | aed = (struct allocExtDesc *)(nbh->b_data); | |
1783 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT)) | |
4b11111a MS |
1784 | aed->previousAllocExtLocation = |
1785 | cpu_to_le32(obloc.logicalBlockNum); | |
cb00ea35 | 1786 | if (epos->offset + adsize > inode->i_sb->s_blocksize) { |
ff116fc8 | 1787 | loffset = epos->offset; |
1da177e4 LT |
1788 | aed->lengthAllocDescs = cpu_to_le32(adsize); |
1789 | sptr = ptr - adsize; | |
1790 | dptr = nbh->b_data + sizeof(struct allocExtDesc); | |
1791 | memcpy(dptr, sptr, adsize); | |
ff116fc8 | 1792 | epos->offset = sizeof(struct allocExtDesc) + adsize; |
cb00ea35 | 1793 | } else { |
ff116fc8 | 1794 | loffset = epos->offset + adsize; |
1da177e4 LT |
1795 | aed->lengthAllocDescs = cpu_to_le32(0); |
1796 | sptr = ptr; | |
ff116fc8 | 1797 | epos->offset = sizeof(struct allocExtDesc); |
1da177e4 | 1798 | |
cb00ea35 | 1799 | if (epos->bh) { |
ff116fc8 | 1800 | aed = (struct allocExtDesc *)epos->bh->b_data; |
c2104fda | 1801 | le32_add_cpu(&aed->lengthAllocDescs, adsize); |
cb00ea35 | 1802 | } else { |
48d6d8ff | 1803 | iinfo->i_lenAlloc += adsize; |
1da177e4 LT |
1804 | mark_inode_dirty(inode); |
1805 | } | |
1806 | } | |
6c79e987 | 1807 | if (UDF_SB(inode->i_sb)->s_udfrev >= 0x0200) |
1da177e4 | 1808 | udf_new_tag(nbh->b_data, TAG_IDENT_AED, 3, 1, |
5ca4e4be | 1809 | epos->block.logicalBlockNum, sizeof(struct tag)); |
1da177e4 LT |
1810 | else |
1811 | udf_new_tag(nbh->b_data, TAG_IDENT_AED, 2, 1, | |
5ca4e4be | 1812 | epos->block.logicalBlockNum, sizeof(struct tag)); |
48d6d8ff | 1813 | switch (iinfo->i_alloc_type) { |
cb00ea35 | 1814 | case ICBTAG_FLAG_AD_SHORT: |
5ca4e4be | 1815 | sad = (struct short_ad *)sptr; |
28de7948 CG |
1816 | sad->extLength = cpu_to_le32(EXT_NEXT_EXTENT_ALLOCDECS | |
1817 | inode->i_sb->s_blocksize); | |
4b11111a MS |
1818 | sad->extPosition = |
1819 | cpu_to_le32(epos->block.logicalBlockNum); | |
28de7948 | 1820 | break; |
cb00ea35 | 1821 | case ICBTAG_FLAG_AD_LONG: |
5ca4e4be | 1822 | lad = (struct long_ad *)sptr; |
28de7948 CG |
1823 | lad->extLength = cpu_to_le32(EXT_NEXT_EXTENT_ALLOCDECS | |
1824 | inode->i_sb->s_blocksize); | |
1825 | lad->extLocation = cpu_to_lelb(epos->block); | |
1826 | memset(lad->impUse, 0x00, sizeof(lad->impUse)); | |
1827 | break; | |
1da177e4 | 1828 | } |
cb00ea35 | 1829 | if (epos->bh) { |
28de7948 | 1830 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
6c79e987 | 1831 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) |
ff116fc8 | 1832 | udf_update_tag(epos->bh->b_data, loffset); |
1da177e4 | 1833 | else |
4b11111a MS |
1834 | udf_update_tag(epos->bh->b_data, |
1835 | sizeof(struct allocExtDesc)); | |
ff116fc8 | 1836 | mark_buffer_dirty_inode(epos->bh, inode); |
3bf25cb4 | 1837 | brelse(epos->bh); |
28de7948 | 1838 | } else { |
1da177e4 | 1839 | mark_inode_dirty(inode); |
28de7948 | 1840 | } |
ff116fc8 | 1841 | epos->bh = nbh; |
1da177e4 LT |
1842 | } |
1843 | ||
7e49b6f2 | 1844 | udf_write_aext(inode, epos, eloc, elen, inc); |
1da177e4 | 1845 | |
cb00ea35 | 1846 | if (!epos->bh) { |
48d6d8ff | 1847 | iinfo->i_lenAlloc += adsize; |
1da177e4 | 1848 | mark_inode_dirty(inode); |
cb00ea35 | 1849 | } else { |
ff116fc8 | 1850 | aed = (struct allocExtDesc *)epos->bh->b_data; |
c2104fda | 1851 | le32_add_cpu(&aed->lengthAllocDescs, adsize); |
4b11111a MS |
1852 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
1853 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) | |
1854 | udf_update_tag(epos->bh->b_data, | |
1855 | epos->offset + (inc ? 0 : adsize)); | |
1da177e4 | 1856 | else |
4b11111a MS |
1857 | udf_update_tag(epos->bh->b_data, |
1858 | sizeof(struct allocExtDesc)); | |
ff116fc8 | 1859 | mark_buffer_dirty_inode(epos->bh, inode); |
1da177e4 LT |
1860 | } |
1861 | ||
7e49b6f2 | 1862 | return 0; |
1da177e4 LT |
1863 | } |
1864 | ||
7e49b6f2 JK |
1865 | void udf_write_aext(struct inode *inode, struct extent_position *epos, |
1866 | struct kernel_lb_addr *eloc, uint32_t elen, int inc) | |
1da177e4 LT |
1867 | { |
1868 | int adsize; | |
1869 | uint8_t *ptr; | |
5ca4e4be PE |
1870 | struct short_ad *sad; |
1871 | struct long_ad *lad; | |
48d6d8ff | 1872 | struct udf_inode_info *iinfo = UDF_I(inode); |
1da177e4 | 1873 | |
ff116fc8 | 1874 | if (!epos->bh) |
48d6d8ff | 1875 | ptr = iinfo->i_ext.i_data + epos->offset - |
4b11111a | 1876 | udf_file_entry_alloc_offset(inode) + |
48d6d8ff | 1877 | iinfo->i_lenEAttr; |
1da177e4 | 1878 | else |
ff116fc8 | 1879 | ptr = epos->bh->b_data + epos->offset; |
1da177e4 | 1880 | |
48d6d8ff | 1881 | switch (iinfo->i_alloc_type) { |
cb00ea35 | 1882 | case ICBTAG_FLAG_AD_SHORT: |
5ca4e4be | 1883 | sad = (struct short_ad *)ptr; |
28de7948 | 1884 | sad->extLength = cpu_to_le32(elen); |
97e961fd | 1885 | sad->extPosition = cpu_to_le32(eloc->logicalBlockNum); |
5ca4e4be | 1886 | adsize = sizeof(struct short_ad); |
28de7948 | 1887 | break; |
cb00ea35 | 1888 | case ICBTAG_FLAG_AD_LONG: |
5ca4e4be | 1889 | lad = (struct long_ad *)ptr; |
28de7948 | 1890 | lad->extLength = cpu_to_le32(elen); |
97e961fd | 1891 | lad->extLocation = cpu_to_lelb(*eloc); |
28de7948 | 1892 | memset(lad->impUse, 0x00, sizeof(lad->impUse)); |
5ca4e4be | 1893 | adsize = sizeof(struct long_ad); |
28de7948 | 1894 | break; |
cb00ea35 | 1895 | default: |
7e49b6f2 | 1896 | return; |
1da177e4 LT |
1897 | } |
1898 | ||
cb00ea35 | 1899 | if (epos->bh) { |
28de7948 | 1900 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
6c79e987 | 1901 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) { |
4b11111a MS |
1902 | struct allocExtDesc *aed = |
1903 | (struct allocExtDesc *)epos->bh->b_data; | |
ff116fc8 | 1904 | udf_update_tag(epos->bh->b_data, |
4b11111a MS |
1905 | le32_to_cpu(aed->lengthAllocDescs) + |
1906 | sizeof(struct allocExtDesc)); | |
1da177e4 | 1907 | } |
ff116fc8 | 1908 | mark_buffer_dirty_inode(epos->bh, inode); |
28de7948 | 1909 | } else { |
1da177e4 | 1910 | mark_inode_dirty(inode); |
28de7948 | 1911 | } |
1da177e4 LT |
1912 | |
1913 | if (inc) | |
ff116fc8 | 1914 | epos->offset += adsize; |
1da177e4 LT |
1915 | } |
1916 | ||
4b11111a | 1917 | int8_t udf_next_aext(struct inode *inode, struct extent_position *epos, |
5ca4e4be | 1918 | struct kernel_lb_addr *eloc, uint32_t *elen, int inc) |
1da177e4 LT |
1919 | { |
1920 | int8_t etype; | |
1921 | ||
ff116fc8 | 1922 | while ((etype = udf_current_aext(inode, epos, eloc, elen, inc)) == |
cb00ea35 | 1923 | (EXT_NEXT_EXTENT_ALLOCDECS >> 30)) { |
4b11111a | 1924 | int block; |
ff116fc8 JK |
1925 | epos->block = *eloc; |
1926 | epos->offset = sizeof(struct allocExtDesc); | |
3bf25cb4 | 1927 | brelse(epos->bh); |
97e961fd | 1928 | block = udf_get_lb_pblock(inode->i_sb, &epos->block, 0); |
4b11111a MS |
1929 | epos->bh = udf_tread(inode->i_sb, block); |
1930 | if (!epos->bh) { | |
1931 | udf_debug("reading block %d failed!\n", block); | |
1da177e4 LT |
1932 | return -1; |
1933 | } | |
1934 | } | |
1935 | ||
1936 | return etype; | |
1937 | } | |
1938 | ||
4b11111a | 1939 | int8_t udf_current_aext(struct inode *inode, struct extent_position *epos, |
5ca4e4be | 1940 | struct kernel_lb_addr *eloc, uint32_t *elen, int inc) |
1da177e4 LT |
1941 | { |
1942 | int alen; | |
1943 | int8_t etype; | |
1944 | uint8_t *ptr; | |
5ca4e4be PE |
1945 | struct short_ad *sad; |
1946 | struct long_ad *lad; | |
48d6d8ff | 1947 | struct udf_inode_info *iinfo = UDF_I(inode); |
28de7948 | 1948 | |
cb00ea35 | 1949 | if (!epos->bh) { |
ff116fc8 JK |
1950 | if (!epos->offset) |
1951 | epos->offset = udf_file_entry_alloc_offset(inode); | |
48d6d8ff | 1952 | ptr = iinfo->i_ext.i_data + epos->offset - |
4b11111a | 1953 | udf_file_entry_alloc_offset(inode) + |
48d6d8ff | 1954 | iinfo->i_lenEAttr; |
4b11111a | 1955 | alen = udf_file_entry_alloc_offset(inode) + |
48d6d8ff | 1956 | iinfo->i_lenAlloc; |
cb00ea35 | 1957 | } else { |
ff116fc8 JK |
1958 | if (!epos->offset) |
1959 | epos->offset = sizeof(struct allocExtDesc); | |
1960 | ptr = epos->bh->b_data + epos->offset; | |
28de7948 | 1961 | alen = sizeof(struct allocExtDesc) + |
4b11111a MS |
1962 | le32_to_cpu(((struct allocExtDesc *)epos->bh->b_data)-> |
1963 | lengthAllocDescs); | |
1da177e4 LT |
1964 | } |
1965 | ||
48d6d8ff | 1966 | switch (iinfo->i_alloc_type) { |
cb00ea35 | 1967 | case ICBTAG_FLAG_AD_SHORT: |
4b11111a MS |
1968 | sad = udf_get_fileshortad(ptr, alen, &epos->offset, inc); |
1969 | if (!sad) | |
28de7948 CG |
1970 | return -1; |
1971 | etype = le32_to_cpu(sad->extLength) >> 30; | |
1972 | eloc->logicalBlockNum = le32_to_cpu(sad->extPosition); | |
4b11111a | 1973 | eloc->partitionReferenceNum = |
48d6d8ff | 1974 | iinfo->i_location.partitionReferenceNum; |
28de7948 CG |
1975 | *elen = le32_to_cpu(sad->extLength) & UDF_EXTENT_LENGTH_MASK; |
1976 | break; | |
cb00ea35 | 1977 | case ICBTAG_FLAG_AD_LONG: |
4b11111a MS |
1978 | lad = udf_get_filelongad(ptr, alen, &epos->offset, inc); |
1979 | if (!lad) | |
1da177e4 | 1980 | return -1; |
28de7948 CG |
1981 | etype = le32_to_cpu(lad->extLength) >> 30; |
1982 | *eloc = lelb_to_cpu(lad->extLocation); | |
1983 | *elen = le32_to_cpu(lad->extLength) & UDF_EXTENT_LENGTH_MASK; | |
1984 | break; | |
1985 | default: | |
4b11111a | 1986 | udf_debug("alloc_type = %d unsupported\n", |
48d6d8ff | 1987 | iinfo->i_alloc_type); |
28de7948 | 1988 | return -1; |
1da177e4 LT |
1989 | } |
1990 | ||
1991 | return etype; | |
1992 | } | |
1993 | ||
28de7948 | 1994 | static int8_t udf_insert_aext(struct inode *inode, struct extent_position epos, |
5ca4e4be | 1995 | struct kernel_lb_addr neloc, uint32_t nelen) |
1da177e4 | 1996 | { |
5ca4e4be | 1997 | struct kernel_lb_addr oeloc; |
1da177e4 LT |
1998 | uint32_t oelen; |
1999 | int8_t etype; | |
2000 | ||
ff116fc8 | 2001 | if (epos.bh) |
3bf25cb4 | 2002 | get_bh(epos.bh); |
1da177e4 | 2003 | |
cb00ea35 | 2004 | while ((etype = udf_next_aext(inode, &epos, &oeloc, &oelen, 0)) != -1) { |
97e961fd | 2005 | udf_write_aext(inode, &epos, &neloc, nelen, 1); |
1da177e4 LT |
2006 | neloc = oeloc; |
2007 | nelen = (etype << 30) | oelen; | |
2008 | } | |
97e961fd | 2009 | udf_add_aext(inode, &epos, &neloc, nelen, 1); |
3bf25cb4 | 2010 | brelse(epos.bh); |
28de7948 | 2011 | |
1da177e4 LT |
2012 | return (nelen >> 30); |
2013 | } | |
2014 | ||
4b11111a | 2015 | int8_t udf_delete_aext(struct inode *inode, struct extent_position epos, |
5ca4e4be | 2016 | struct kernel_lb_addr eloc, uint32_t elen) |
1da177e4 | 2017 | { |
ff116fc8 JK |
2018 | struct extent_position oepos; |
2019 | int adsize; | |
1da177e4 LT |
2020 | int8_t etype; |
2021 | struct allocExtDesc *aed; | |
48d6d8ff | 2022 | struct udf_inode_info *iinfo; |
1da177e4 | 2023 | |
cb00ea35 | 2024 | if (epos.bh) { |
3bf25cb4 JK |
2025 | get_bh(epos.bh); |
2026 | get_bh(epos.bh); | |
1da177e4 LT |
2027 | } |
2028 | ||
48d6d8ff MS |
2029 | iinfo = UDF_I(inode); |
2030 | if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) | |
5ca4e4be | 2031 | adsize = sizeof(struct short_ad); |
48d6d8ff | 2032 | else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
5ca4e4be | 2033 | adsize = sizeof(struct long_ad); |
1da177e4 LT |
2034 | else |
2035 | adsize = 0; | |
2036 | ||
ff116fc8 JK |
2037 | oepos = epos; |
2038 | if (udf_next_aext(inode, &epos, &eloc, &elen, 1) == -1) | |
1da177e4 LT |
2039 | return -1; |
2040 | ||
cb00ea35 | 2041 | while ((etype = udf_next_aext(inode, &epos, &eloc, &elen, 1)) != -1) { |
97e961fd | 2042 | udf_write_aext(inode, &oepos, &eloc, (etype << 30) | elen, 1); |
cb00ea35 | 2043 | if (oepos.bh != epos.bh) { |
ff116fc8 | 2044 | oepos.block = epos.block; |
3bf25cb4 JK |
2045 | brelse(oepos.bh); |
2046 | get_bh(epos.bh); | |
ff116fc8 JK |
2047 | oepos.bh = epos.bh; |
2048 | oepos.offset = epos.offset - adsize; | |
1da177e4 LT |
2049 | } |
2050 | } | |
5ca4e4be | 2051 | memset(&eloc, 0x00, sizeof(struct kernel_lb_addr)); |
1da177e4 LT |
2052 | elen = 0; |
2053 | ||
cb00ea35 | 2054 | if (epos.bh != oepos.bh) { |
97e961fd PE |
2055 | udf_free_blocks(inode->i_sb, inode, &epos.block, 0, 1); |
2056 | udf_write_aext(inode, &oepos, &eloc, elen, 1); | |
2057 | udf_write_aext(inode, &oepos, &eloc, elen, 1); | |
cb00ea35 | 2058 | if (!oepos.bh) { |
48d6d8ff | 2059 | iinfo->i_lenAlloc -= (adsize * 2); |
1da177e4 | 2060 | mark_inode_dirty(inode); |
cb00ea35 | 2061 | } else { |
ff116fc8 | 2062 | aed = (struct allocExtDesc *)oepos.bh->b_data; |
c2104fda | 2063 | le32_add_cpu(&aed->lengthAllocDescs, -(2 * adsize)); |
28de7948 | 2064 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
6c79e987 | 2065 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) |
4b11111a MS |
2066 | udf_update_tag(oepos.bh->b_data, |
2067 | oepos.offset - (2 * adsize)); | |
1da177e4 | 2068 | else |
4b11111a MS |
2069 | udf_update_tag(oepos.bh->b_data, |
2070 | sizeof(struct allocExtDesc)); | |
ff116fc8 | 2071 | mark_buffer_dirty_inode(oepos.bh, inode); |
1da177e4 | 2072 | } |
cb00ea35 | 2073 | } else { |
97e961fd | 2074 | udf_write_aext(inode, &oepos, &eloc, elen, 1); |
cb00ea35 | 2075 | if (!oepos.bh) { |
48d6d8ff | 2076 | iinfo->i_lenAlloc -= adsize; |
1da177e4 | 2077 | mark_inode_dirty(inode); |
cb00ea35 | 2078 | } else { |
ff116fc8 | 2079 | aed = (struct allocExtDesc *)oepos.bh->b_data; |
c2104fda | 2080 | le32_add_cpu(&aed->lengthAllocDescs, -adsize); |
28de7948 | 2081 | if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
6c79e987 | 2082 | UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) |
4b11111a MS |
2083 | udf_update_tag(oepos.bh->b_data, |
2084 | epos.offset - adsize); | |
1da177e4 | 2085 | else |
4b11111a MS |
2086 | udf_update_tag(oepos.bh->b_data, |
2087 | sizeof(struct allocExtDesc)); | |
ff116fc8 | 2088 | mark_buffer_dirty_inode(oepos.bh, inode); |
1da177e4 LT |
2089 | } |
2090 | } | |
647bd61a | 2091 | |
3bf25cb4 JK |
2092 | brelse(epos.bh); |
2093 | brelse(oepos.bh); | |
28de7948 | 2094 | |
1da177e4 LT |
2095 | return (elen >> 30); |
2096 | } | |
2097 | ||
4b11111a | 2098 | int8_t inode_bmap(struct inode *inode, sector_t block, |
5ca4e4be | 2099 | struct extent_position *pos, struct kernel_lb_addr *eloc, |
4b11111a | 2100 | uint32_t *elen, sector_t *offset) |
1da177e4 | 2101 | { |
4b11111a | 2102 | unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; |
cb00ea35 | 2103 | loff_t lbcount = 0, bcount = |
4b11111a | 2104 | (loff_t) block << blocksize_bits; |
1da177e4 | 2105 | int8_t etype; |
48d6d8ff | 2106 | struct udf_inode_info *iinfo; |
1da177e4 | 2107 | |
48d6d8ff | 2108 | iinfo = UDF_I(inode); |
ff116fc8 | 2109 | pos->offset = 0; |
48d6d8ff | 2110 | pos->block = iinfo->i_location; |
ff116fc8 | 2111 | pos->bh = NULL; |
1da177e4 | 2112 | *elen = 0; |
1da177e4 | 2113 | |
cb00ea35 | 2114 | do { |
4b11111a MS |
2115 | etype = udf_next_aext(inode, pos, eloc, elen, 1); |
2116 | if (etype == -1) { | |
2117 | *offset = (bcount - lbcount) >> blocksize_bits; | |
48d6d8ff | 2118 | iinfo->i_lenExtents = lbcount; |
1da177e4 LT |
2119 | return -1; |
2120 | } | |
2121 | lbcount += *elen; | |
2122 | } while (lbcount <= bcount); | |
2123 | ||
4b11111a | 2124 | *offset = (bcount + *elen - lbcount) >> blocksize_bits; |
1da177e4 LT |
2125 | |
2126 | return etype; | |
2127 | } | |
2128 | ||
60448b1d | 2129 | long udf_block_map(struct inode *inode, sector_t block) |
1da177e4 | 2130 | { |
5ca4e4be | 2131 | struct kernel_lb_addr eloc; |
ff116fc8 | 2132 | uint32_t elen; |
60448b1d | 2133 | sector_t offset; |
28de7948 | 2134 | struct extent_position epos = {}; |
1da177e4 LT |
2135 | int ret; |
2136 | ||
4d0fb621 | 2137 | down_read(&UDF_I(inode)->i_data_sem); |
1da177e4 | 2138 | |
4b11111a MS |
2139 | if (inode_bmap(inode, block, &epos, &eloc, &elen, &offset) == |
2140 | (EXT_RECORDED_ALLOCATED >> 30)) | |
97e961fd | 2141 | ret = udf_get_lb_pblock(inode->i_sb, &eloc, offset); |
1da177e4 LT |
2142 | else |
2143 | ret = 0; | |
2144 | ||
4d0fb621 | 2145 | up_read(&UDF_I(inode)->i_data_sem); |
3bf25cb4 | 2146 | brelse(epos.bh); |
1da177e4 LT |
2147 | |
2148 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_VARCONV)) | |
2149 | return udf_fixed_to_variable(ret); | |
2150 | else | |
2151 | return ret; | |
2152 | } |