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