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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * linux/fs/ufs/inode.c | |
3 | * | |
4 | * Copyright (C) 1998 | |
5 | * Daniel Pirkl <daniel.pirkl@email.cz> | |
6 | * Charles University, Faculty of Mathematics and Physics | |
7 | * | |
8 | * from | |
9 | * | |
10 | * linux/fs/ext2/inode.c | |
11 | * | |
12 | * Copyright (C) 1992, 1993, 1994, 1995 | |
13 | * Remy Card (card@masi.ibp.fr) | |
14 | * Laboratoire MASI - Institut Blaise Pascal | |
15 | * Universite Pierre et Marie Curie (Paris VI) | |
16 | * | |
17 | * from | |
18 | * | |
19 | * linux/fs/minix/inode.c | |
20 | * | |
21 | * Copyright (C) 1991, 1992 Linus Torvalds | |
22 | * | |
23 | * Goal-directed block allocation by Stephen Tweedie (sct@dcs.ed.ac.uk), 1993 | |
24 | * Big-endian to little-endian byte-swapping/bitmaps by | |
25 | * David S. Miller (davem@caip.rutgers.edu), 1995 | |
26 | */ | |
27 | ||
28 | #include <asm/uaccess.h> | |
29 | #include <asm/system.h> | |
30 | ||
31 | #include <linux/errno.h> | |
32 | #include <linux/fs.h> | |
33 | #include <linux/ufs_fs.h> | |
34 | #include <linux/time.h> | |
35 | #include <linux/stat.h> | |
36 | #include <linux/string.h> | |
37 | #include <linux/mm.h> | |
38 | #include <linux/smp_lock.h> | |
39 | #include <linux/buffer_head.h> | |
40 | ||
41 | #include "swab.h" | |
42 | #include "util.h" | |
43 | ||
1da177e4 LT |
44 | static int ufs_block_to_path(struct inode *inode, sector_t i_block, sector_t offsets[4]) |
45 | { | |
46 | struct ufs_sb_private_info *uspi = UFS_SB(inode->i_sb)->s_uspi; | |
47 | int ptrs = uspi->s_apb; | |
48 | int ptrs_bits = uspi->s_apbshift; | |
49 | const long direct_blocks = UFS_NDADDR, | |
50 | indirect_blocks = ptrs, | |
51 | double_blocks = (1 << (ptrs_bits * 2)); | |
52 | int n = 0; | |
53 | ||
54 | ||
abf5d15f | 55 | UFSD("ptrs=uspi->s_apb = %d,double_blocks=%ld \n",ptrs,double_blocks); |
1da177e4 LT |
56 | if (i_block < 0) { |
57 | ufs_warning(inode->i_sb, "ufs_block_to_path", "block < 0"); | |
58 | } else if (i_block < direct_blocks) { | |
59 | offsets[n++] = i_block; | |
60 | } else if ((i_block -= direct_blocks) < indirect_blocks) { | |
61 | offsets[n++] = UFS_IND_BLOCK; | |
62 | offsets[n++] = i_block; | |
63 | } else if ((i_block -= indirect_blocks) < double_blocks) { | |
64 | offsets[n++] = UFS_DIND_BLOCK; | |
65 | offsets[n++] = i_block >> ptrs_bits; | |
66 | offsets[n++] = i_block & (ptrs - 1); | |
67 | } else if (((i_block -= double_blocks) >> (ptrs_bits * 2)) < ptrs) { | |
68 | offsets[n++] = UFS_TIND_BLOCK; | |
69 | offsets[n++] = i_block >> (ptrs_bits * 2); | |
70 | offsets[n++] = (i_block >> ptrs_bits) & (ptrs - 1); | |
71 | offsets[n++] = i_block & (ptrs - 1); | |
72 | } else { | |
73 | ufs_warning(inode->i_sb, "ufs_block_to_path", "block > big"); | |
74 | } | |
75 | return n; | |
76 | } | |
77 | ||
78 | /* | |
79 | * Returns the location of the fragment from | |
80 | * the begining of the filesystem. | |
81 | */ | |
82 | ||
83 | u64 ufs_frag_map(struct inode *inode, sector_t frag) | |
84 | { | |
85 | struct ufs_inode_info *ufsi = UFS_I(inode); | |
86 | struct super_block *sb = inode->i_sb; | |
87 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; | |
88 | u64 mask = (u64) uspi->s_apbmask>>uspi->s_fpbshift; | |
89 | int shift = uspi->s_apbshift-uspi->s_fpbshift; | |
90 | sector_t offsets[4], *p; | |
91 | int depth = ufs_block_to_path(inode, frag >> uspi->s_fpbshift, offsets); | |
92 | u64 ret = 0L; | |
93 | __fs32 block; | |
94 | __fs64 u2_block = 0L; | |
95 | unsigned flags = UFS_SB(sb)->s_flags; | |
96 | u64 temp = 0L; | |
97 | ||
abf5d15f ED |
98 | UFSD(": frag = %llu depth = %d\n", (unsigned long long)frag, depth); |
99 | UFSD(": uspi->s_fpbshift = %d ,uspi->s_apbmask = %x, mask=%llx\n",uspi->s_fpbshift,uspi->s_apbmask,mask); | |
1da177e4 LT |
100 | |
101 | if (depth == 0) | |
102 | return 0; | |
103 | ||
104 | p = offsets; | |
105 | ||
106 | lock_kernel(); | |
107 | if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) | |
108 | goto ufs2; | |
109 | ||
110 | block = ufsi->i_u1.i_data[*p++]; | |
111 | if (!block) | |
112 | goto out; | |
113 | while (--depth) { | |
114 | struct buffer_head *bh; | |
115 | sector_t n = *p++; | |
116 | ||
117 | bh = sb_bread(sb, uspi->s_sbbase + fs32_to_cpu(sb, block)+(n>>shift)); | |
118 | if (!bh) | |
119 | goto out; | |
120 | block = ((__fs32 *) bh->b_data)[n & mask]; | |
121 | brelse (bh); | |
122 | if (!block) | |
123 | goto out; | |
124 | } | |
125 | ret = (u64) (uspi->s_sbbase + fs32_to_cpu(sb, block) + (frag & uspi->s_fpbmask)); | |
126 | goto out; | |
127 | ufs2: | |
128 | u2_block = ufsi->i_u1.u2_i_data[*p++]; | |
129 | if (!u2_block) | |
130 | goto out; | |
131 | ||
132 | ||
133 | while (--depth) { | |
134 | struct buffer_head *bh; | |
135 | sector_t n = *p++; | |
136 | ||
137 | ||
138 | temp = (u64)(uspi->s_sbbase) + fs64_to_cpu(sb, u2_block); | |
139 | bh = sb_bread(sb, temp +(u64) (n>>shift)); | |
140 | if (!bh) | |
141 | goto out; | |
142 | u2_block = ((__fs64 *)bh->b_data)[n & mask]; | |
143 | brelse(bh); | |
144 | if (!u2_block) | |
145 | goto out; | |
146 | } | |
147 | temp = (u64)uspi->s_sbbase + fs64_to_cpu(sb, u2_block); | |
148 | ret = temp + (u64) (frag & uspi->s_fpbmask); | |
149 | ||
150 | out: | |
151 | unlock_kernel(); | |
152 | return ret; | |
153 | } | |
154 | ||
022a6dc5 | 155 | static void ufs_clear_frag(struct inode *inode, struct buffer_head *bh) |
c9a27b5d ED |
156 | { |
157 | lock_buffer(bh); | |
158 | memset(bh->b_data, 0, inode->i_sb->s_blocksize); | |
159 | set_buffer_uptodate(bh); | |
160 | mark_buffer_dirty(bh); | |
161 | unlock_buffer(bh); | |
162 | if (IS_SYNC(inode)) | |
163 | sync_dirty_buffer(bh); | |
164 | } | |
165 | ||
022a6dc5 ED |
166 | static struct buffer_head * |
167 | ufs_clear_frags(struct inode *inode, sector_t beg, | |
168 | unsigned int n) | |
169 | { | |
170 | struct buffer_head *res, *bh; | |
171 | sector_t end = beg + n; | |
172 | ||
173 | res = sb_getblk(inode->i_sb, beg); | |
174 | ufs_clear_frag(inode, res); | |
175 | for (++beg; beg < end; ++beg) { | |
176 | bh = sb_getblk(inode->i_sb, beg); | |
177 | ufs_clear_frag(inode, bh); | |
178 | } | |
179 | return res; | |
180 | } | |
181 | ||
182 | /** | |
183 | * ufs_inode_getfrag() - allocate new fragment(s) | |
184 | * @inode - pointer to inode | |
185 | * @fragment - number of `fragment' which hold pointer | |
186 | * to new allocated fragment(s) | |
187 | * @new_fragment - number of new allocated fragment(s) | |
188 | * @required - how many fragment(s) we require | |
189 | * @err - we set it if something wrong | |
190 | * @phys - pointer to where we save physical number of new allocated fragments, | |
191 | * NULL if we allocate not data(indirect blocks for example). | |
192 | * @new - we set it if we allocate new block | |
193 | * @locked_page - for ufs_new_fragments() | |
194 | */ | |
195 | static struct buffer_head * | |
196 | ufs_inode_getfrag(struct inode *inode, unsigned int fragment, | |
197 | sector_t new_fragment, unsigned int required, int *err, | |
198 | long *phys, int *new, struct page *locked_page) | |
1da177e4 LT |
199 | { |
200 | struct ufs_inode_info *ufsi = UFS_I(inode); | |
022a6dc5 ED |
201 | struct super_block *sb = inode->i_sb; |
202 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; | |
1da177e4 LT |
203 | struct buffer_head * result; |
204 | unsigned block, blockoff, lastfrag, lastblock, lastblockoff; | |
205 | unsigned tmp, goal; | |
206 | __fs32 * p, * p2; | |
1da177e4 | 207 | |
022a6dc5 ED |
208 | UFSD("ENTER, ino %lu, fragment %u, new_fragment %llu, required %u, " |
209 | "metadata %d\n", inode->i_ino, fragment, | |
210 | (unsigned long long)new_fragment, required, !phys); | |
1da177e4 | 211 | |
1da177e4 LT |
212 | /* TODO : to be done for write support |
213 | if ( (flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) | |
214 | goto ufs2; | |
215 | */ | |
216 | ||
217 | block = ufs_fragstoblks (fragment); | |
218 | blockoff = ufs_fragnum (fragment); | |
219 | p = ufsi->i_u1.i_data + block; | |
220 | goal = 0; | |
221 | ||
222 | repeat: | |
223 | tmp = fs32_to_cpu(sb, *p); | |
224 | lastfrag = ufsi->i_lastfrag; | |
225 | if (tmp && fragment < lastfrag) { | |
022a6dc5 | 226 | if (!phys) { |
1da177e4 LT |
227 | result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff); |
228 | if (tmp == fs32_to_cpu(sb, *p)) { | |
abf5d15f | 229 | UFSD("EXIT, result %u\n", tmp + blockoff); |
1da177e4 LT |
230 | return result; |
231 | } | |
232 | brelse (result); | |
233 | goto repeat; | |
234 | } else { | |
c9a27b5d | 235 | *phys = tmp + blockoff; |
1da177e4 LT |
236 | return NULL; |
237 | } | |
238 | } | |
239 | ||
240 | lastblock = ufs_fragstoblks (lastfrag); | |
241 | lastblockoff = ufs_fragnum (lastfrag); | |
242 | /* | |
243 | * We will extend file into new block beyond last allocated block | |
244 | */ | |
245 | if (lastblock < block) { | |
246 | /* | |
247 | * We must reallocate last allocated block | |
248 | */ | |
249 | if (lastblockoff) { | |
250 | p2 = ufsi->i_u1.i_data + lastblock; | |
251 | tmp = ufs_new_fragments (inode, p2, lastfrag, | |
6ef4d6bf ED |
252 | fs32_to_cpu(sb, *p2), uspi->s_fpb - lastblockoff, |
253 | err, locked_page); | |
1da177e4 LT |
254 | if (!tmp) { |
255 | if (lastfrag != ufsi->i_lastfrag) | |
256 | goto repeat; | |
257 | else | |
258 | return NULL; | |
259 | } | |
260 | lastfrag = ufsi->i_lastfrag; | |
261 | ||
262 | } | |
263 | goal = fs32_to_cpu(sb, ufsi->i_u1.i_data[lastblock]) + uspi->s_fpb; | |
264 | tmp = ufs_new_fragments (inode, p, fragment - blockoff, | |
6ef4d6bf ED |
265 | goal, required + blockoff, |
266 | err, locked_page); | |
1da177e4 LT |
267 | } |
268 | /* | |
269 | * We will extend last allocated block | |
270 | */ | |
271 | else if (lastblock == block) { | |
6ef4d6bf ED |
272 | tmp = ufs_new_fragments(inode, p, fragment - (blockoff - lastblockoff), |
273 | fs32_to_cpu(sb, *p), required + (blockoff - lastblockoff), | |
274 | err, locked_page); | |
1da177e4 LT |
275 | } |
276 | /* | |
277 | * We will allocate new block before last allocated block | |
278 | */ | |
279 | else /* (lastblock > block) */ { | |
280 | if (lastblock && (tmp = fs32_to_cpu(sb, ufsi->i_u1.i_data[lastblock-1]))) | |
281 | goal = tmp + uspi->s_fpb; | |
6ef4d6bf ED |
282 | tmp = ufs_new_fragments(inode, p, fragment - blockoff, |
283 | goal, uspi->s_fpb, err, locked_page); | |
1da177e4 LT |
284 | } |
285 | if (!tmp) { | |
286 | if ((!blockoff && *p) || | |
287 | (blockoff && lastfrag != ufsi->i_lastfrag)) | |
288 | goto repeat; | |
289 | *err = -ENOSPC; | |
290 | return NULL; | |
291 | } | |
292 | ||
022a6dc5 ED |
293 | if (!phys) { |
294 | result = ufs_clear_frags(inode, tmp + blockoff, required); | |
1da177e4 | 295 | } else { |
c9a27b5d | 296 | *phys = tmp + blockoff; |
1da177e4 LT |
297 | result = NULL; |
298 | *err = 0; | |
299 | *new = 1; | |
300 | } | |
301 | ||
302 | inode->i_ctime = CURRENT_TIME_SEC; | |
303 | if (IS_SYNC(inode)) | |
304 | ufs_sync_inode (inode); | |
305 | mark_inode_dirty(inode); | |
abf5d15f | 306 | UFSD("EXIT, result %u\n", tmp + blockoff); |
1da177e4 LT |
307 | return result; |
308 | ||
309 | /* This part : To be implemented .... | |
310 | Required only for writing, not required for READ-ONLY. | |
311 | ufs2: | |
312 | ||
313 | u2_block = ufs_fragstoblks(fragment); | |
314 | u2_blockoff = ufs_fragnum(fragment); | |
315 | p = ufsi->i_u1.u2_i_data + block; | |
316 | goal = 0; | |
317 | ||
318 | repeat2: | |
319 | tmp = fs32_to_cpu(sb, *p); | |
320 | lastfrag = ufsi->i_lastfrag; | |
321 | ||
322 | */ | |
323 | } | |
324 | ||
022a6dc5 ED |
325 | /** |
326 | * ufs_inode_getblock() - allocate new block | |
327 | * @inode - pointer to inode | |
328 | * @bh - pointer to block which hold "pointer" to new allocated block | |
329 | * @fragment - number of `fragment' which hold pointer | |
330 | * to new allocated block | |
331 | * @new_fragment - number of new allocated fragment | |
332 | * (block will hold this fragment and also uspi->s_fpb-1) | |
333 | * @err - see ufs_inode_getfrag() | |
334 | * @phys - see ufs_inode_getfrag() | |
335 | * @new - see ufs_inode_getfrag() | |
336 | * @locked_page - see ufs_inode_getfrag() | |
337 | */ | |
338 | static struct buffer_head * | |
339 | ufs_inode_getblock(struct inode *inode, struct buffer_head *bh, | |
340 | unsigned int fragment, sector_t new_fragment, int *err, | |
341 | long *phys, int *new, struct page *locked_page) | |
1da177e4 | 342 | { |
022a6dc5 ED |
343 | struct super_block *sb = inode->i_sb; |
344 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; | |
1da177e4 LT |
345 | struct buffer_head * result; |
346 | unsigned tmp, goal, block, blockoff; | |
347 | __fs32 * p; | |
348 | ||
1da177e4 LT |
349 | block = ufs_fragstoblks (fragment); |
350 | blockoff = ufs_fragnum (fragment); | |
351 | ||
022a6dc5 ED |
352 | UFSD("ENTER, ino %lu, fragment %u, new_fragment %llu, metadata %d\n", |
353 | inode->i_ino, fragment, (unsigned long long)new_fragment, !phys); | |
1da177e4 LT |
354 | |
355 | result = NULL; | |
356 | if (!bh) | |
357 | goto out; | |
358 | if (!buffer_uptodate(bh)) { | |
359 | ll_rw_block (READ, 1, &bh); | |
360 | wait_on_buffer (bh); | |
361 | if (!buffer_uptodate(bh)) | |
362 | goto out; | |
363 | } | |
364 | ||
365 | p = (__fs32 *) bh->b_data + block; | |
366 | repeat: | |
367 | tmp = fs32_to_cpu(sb, *p); | |
368 | if (tmp) { | |
022a6dc5 | 369 | if (!phys) { |
1da177e4 LT |
370 | result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff); |
371 | if (tmp == fs32_to_cpu(sb, *p)) | |
372 | goto out; | |
373 | brelse (result); | |
374 | goto repeat; | |
375 | } else { | |
c9a27b5d | 376 | *phys = tmp + blockoff; |
1da177e4 LT |
377 | goto out; |
378 | } | |
379 | } | |
380 | ||
381 | if (block && (tmp = fs32_to_cpu(sb, ((__fs32*)bh->b_data)[block-1]) + uspi->s_fpb)) | |
382 | goal = tmp + uspi->s_fpb; | |
383 | else | |
384 | goal = bh->b_blocknr + uspi->s_fpb; | |
6ef4d6bf ED |
385 | tmp = ufs_new_fragments(inode, p, ufs_blknum(new_fragment), goal, |
386 | uspi->s_fpb, err, locked_page); | |
1da177e4 LT |
387 | if (!tmp) { |
388 | if (fs32_to_cpu(sb, *p)) | |
389 | goto repeat; | |
390 | goto out; | |
391 | } | |
392 | ||
c9a27b5d | 393 | |
022a6dc5 ED |
394 | if (!phys) { |
395 | result = ufs_clear_frags(inode, tmp + blockoff, uspi->s_fpb); | |
1da177e4 | 396 | } else { |
c9a27b5d | 397 | *phys = tmp + blockoff; |
1da177e4 LT |
398 | *new = 1; |
399 | } | |
400 | ||
401 | mark_buffer_dirty(bh); | |
402 | if (IS_SYNC(inode)) | |
403 | sync_dirty_buffer(bh); | |
404 | inode->i_ctime = CURRENT_TIME_SEC; | |
405 | mark_inode_dirty(inode); | |
abf5d15f | 406 | UFSD("result %u\n", tmp + blockoff); |
1da177e4 LT |
407 | out: |
408 | brelse (bh); | |
abf5d15f | 409 | UFSD("EXIT\n"); |
1da177e4 LT |
410 | return result; |
411 | } | |
412 | ||
022a6dc5 ED |
413 | /** |
414 | * ufs_getfrag_bloc() - `get_block_t' function, interface between UFS and | |
415 | * readpage, writepage and so on | |
1da177e4 LT |
416 | */ |
417 | ||
022a6dc5 | 418 | int ufs_getfrag_block(struct inode *inode, sector_t fragment, struct buffer_head *bh_result, int create) |
1da177e4 LT |
419 | { |
420 | struct super_block * sb = inode->i_sb; | |
421 | struct ufs_sb_private_info * uspi = UFS_SB(sb)->s_uspi; | |
422 | struct buffer_head * bh; | |
423 | int ret, err, new; | |
424 | unsigned long ptr,phys; | |
425 | u64 phys64 = 0; | |
426 | ||
427 | if (!create) { | |
428 | phys64 = ufs_frag_map(inode, fragment); | |
abf5d15f | 429 | UFSD("phys64 = %llu \n",phys64); |
1da177e4 LT |
430 | if (phys64) |
431 | map_bh(bh_result, sb, phys64); | |
432 | return 0; | |
433 | } | |
434 | ||
435 | /* This code entered only while writing ....? */ | |
436 | ||
437 | err = -EIO; | |
438 | new = 0; | |
439 | ret = 0; | |
440 | bh = NULL; | |
441 | ||
442 | lock_kernel(); | |
443 | ||
abf5d15f | 444 | UFSD("ENTER, ino %lu, fragment %llu\n", inode->i_ino, (unsigned long long)fragment); |
1da177e4 LT |
445 | if (fragment < 0) |
446 | goto abort_negative; | |
447 | if (fragment > | |
448 | ((UFS_NDADDR + uspi->s_apb + uspi->s_2apb + uspi->s_3apb) | |
449 | << uspi->s_fpbshift)) | |
450 | goto abort_too_big; | |
451 | ||
452 | err = 0; | |
453 | ptr = fragment; | |
454 | ||
455 | /* | |
456 | * ok, these macros clean the logic up a bit and make | |
457 | * it much more readable: | |
458 | */ | |
459 | #define GET_INODE_DATABLOCK(x) \ | |
022a6dc5 | 460 | ufs_inode_getfrag(inode, x, fragment, 1, &err, &phys, &new, bh_result->b_page) |
1da177e4 | 461 | #define GET_INODE_PTR(x) \ |
022a6dc5 | 462 | ufs_inode_getfrag(inode, x, fragment, uspi->s_fpb, &err, NULL, NULL, bh_result->b_page) |
1da177e4 | 463 | #define GET_INDIRECT_DATABLOCK(x) \ |
022a6dc5 ED |
464 | ufs_inode_getblock(inode, bh, x, fragment, \ |
465 | &err, &phys, &new, bh_result->b_page); | |
1da177e4 | 466 | #define GET_INDIRECT_PTR(x) \ |
022a6dc5 ED |
467 | ufs_inode_getblock(inode, bh, x, fragment, \ |
468 | &err, NULL, NULL, bh_result->b_page); | |
1da177e4 LT |
469 | |
470 | if (ptr < UFS_NDIR_FRAGMENT) { | |
471 | bh = GET_INODE_DATABLOCK(ptr); | |
472 | goto out; | |
473 | } | |
474 | ptr -= UFS_NDIR_FRAGMENT; | |
475 | if (ptr < (1 << (uspi->s_apbshift + uspi->s_fpbshift))) { | |
476 | bh = GET_INODE_PTR(UFS_IND_FRAGMENT + (ptr >> uspi->s_apbshift)); | |
477 | goto get_indirect; | |
478 | } | |
479 | ptr -= 1 << (uspi->s_apbshift + uspi->s_fpbshift); | |
480 | if (ptr < (1 << (uspi->s_2apbshift + uspi->s_fpbshift))) { | |
481 | bh = GET_INODE_PTR(UFS_DIND_FRAGMENT + (ptr >> uspi->s_2apbshift)); | |
482 | goto get_double; | |
483 | } | |
484 | ptr -= 1 << (uspi->s_2apbshift + uspi->s_fpbshift); | |
485 | bh = GET_INODE_PTR(UFS_TIND_FRAGMENT + (ptr >> uspi->s_3apbshift)); | |
486 | bh = GET_INDIRECT_PTR((ptr >> uspi->s_2apbshift) & uspi->s_apbmask); | |
487 | get_double: | |
488 | bh = GET_INDIRECT_PTR((ptr >> uspi->s_apbshift) & uspi->s_apbmask); | |
489 | get_indirect: | |
490 | bh = GET_INDIRECT_DATABLOCK(ptr & uspi->s_apbmask); | |
491 | ||
492 | #undef GET_INODE_DATABLOCK | |
493 | #undef GET_INODE_PTR | |
494 | #undef GET_INDIRECT_DATABLOCK | |
495 | #undef GET_INDIRECT_PTR | |
496 | ||
497 | out: | |
498 | if (err) | |
499 | goto abort; | |
500 | if (new) | |
501 | set_buffer_new(bh_result); | |
502 | map_bh(bh_result, sb, phys); | |
503 | abort: | |
504 | unlock_kernel(); | |
505 | return err; | |
506 | ||
507 | abort_negative: | |
508 | ufs_warning(sb, "ufs_get_block", "block < 0"); | |
509 | goto abort; | |
510 | ||
511 | abort_too_big: | |
512 | ufs_warning(sb, "ufs_get_block", "block > big"); | |
513 | goto abort; | |
514 | } | |
515 | ||
516 | struct buffer_head *ufs_getfrag(struct inode *inode, unsigned int fragment, | |
517 | int create, int *err) | |
518 | { | |
519 | struct buffer_head dummy; | |
520 | int error; | |
521 | ||
522 | dummy.b_state = 0; | |
523 | dummy.b_blocknr = -1000; | |
524 | error = ufs_getfrag_block(inode, fragment, &dummy, create); | |
525 | *err = error; | |
526 | if (!error && buffer_mapped(&dummy)) { | |
527 | struct buffer_head *bh; | |
528 | bh = sb_getblk(inode->i_sb, dummy.b_blocknr); | |
529 | if (buffer_new(&dummy)) { | |
530 | memset(bh->b_data, 0, inode->i_sb->s_blocksize); | |
531 | set_buffer_uptodate(bh); | |
532 | mark_buffer_dirty(bh); | |
533 | } | |
534 | return bh; | |
535 | } | |
536 | return NULL; | |
537 | } | |
538 | ||
539 | struct buffer_head * ufs_bread (struct inode * inode, unsigned fragment, | |
540 | int create, int * err) | |
541 | { | |
542 | struct buffer_head * bh; | |
543 | ||
abf5d15f | 544 | UFSD("ENTER, ino %lu, fragment %u\n", inode->i_ino, fragment); |
1da177e4 LT |
545 | bh = ufs_getfrag (inode, fragment, create, err); |
546 | if (!bh || buffer_uptodate(bh)) | |
547 | return bh; | |
548 | ll_rw_block (READ, 1, &bh); | |
549 | wait_on_buffer (bh); | |
550 | if (buffer_uptodate(bh)) | |
551 | return bh; | |
552 | brelse (bh); | |
553 | *err = -EIO; | |
554 | return NULL; | |
555 | } | |
556 | ||
557 | static int ufs_writepage(struct page *page, struct writeback_control *wbc) | |
558 | { | |
559 | return block_write_full_page(page,ufs_getfrag_block,wbc); | |
560 | } | |
561 | static int ufs_readpage(struct file *file, struct page *page) | |
562 | { | |
563 | return block_read_full_page(page,ufs_getfrag_block); | |
564 | } | |
565 | static int ufs_prepare_write(struct file *file, struct page *page, unsigned from, unsigned to) | |
566 | { | |
567 | return block_prepare_write(page,from,to,ufs_getfrag_block); | |
568 | } | |
569 | static sector_t ufs_bmap(struct address_space *mapping, sector_t block) | |
570 | { | |
571 | return generic_block_bmap(mapping,block,ufs_getfrag_block); | |
572 | } | |
573 | struct address_space_operations ufs_aops = { | |
574 | .readpage = ufs_readpage, | |
575 | .writepage = ufs_writepage, | |
576 | .sync_page = block_sync_page, | |
577 | .prepare_write = ufs_prepare_write, | |
578 | .commit_write = generic_commit_write, | |
579 | .bmap = ufs_bmap | |
580 | }; | |
581 | ||
826843a3 ED |
582 | static void ufs_set_inode_ops(struct inode *inode) |
583 | { | |
584 | if (S_ISREG(inode->i_mode)) { | |
585 | inode->i_op = &ufs_file_inode_operations; | |
586 | inode->i_fop = &ufs_file_operations; | |
587 | inode->i_mapping->a_ops = &ufs_aops; | |
588 | } else if (S_ISDIR(inode->i_mode)) { | |
589 | inode->i_op = &ufs_dir_inode_operations; | |
590 | inode->i_fop = &ufs_dir_operations; | |
591 | inode->i_mapping->a_ops = &ufs_aops; | |
592 | } else if (S_ISLNK(inode->i_mode)) { | |
593 | if (!inode->i_blocks) | |
594 | inode->i_op = &ufs_fast_symlink_inode_operations; | |
595 | else { | |
596 | inode->i_op = &page_symlink_inode_operations; | |
597 | inode->i_mapping->a_ops = &ufs_aops; | |
598 | } | |
599 | } else | |
600 | init_special_inode(inode, inode->i_mode, | |
601 | ufs_get_inode_dev(inode->i_sb, UFS_I(inode))); | |
602 | } | |
603 | ||
1da177e4 LT |
604 | void ufs_read_inode (struct inode * inode) |
605 | { | |
606 | struct ufs_inode_info *ufsi = UFS_I(inode); | |
607 | struct super_block * sb; | |
608 | struct ufs_sb_private_info * uspi; | |
609 | struct ufs_inode * ufs_inode; | |
610 | struct ufs2_inode *ufs2_inode; | |
611 | struct buffer_head * bh; | |
612 | mode_t mode; | |
613 | unsigned i; | |
614 | unsigned flags; | |
615 | ||
abf5d15f | 616 | UFSD("ENTER, ino %lu\n", inode->i_ino); |
1da177e4 LT |
617 | |
618 | sb = inode->i_sb; | |
619 | uspi = UFS_SB(sb)->s_uspi; | |
620 | flags = UFS_SB(sb)->s_flags; | |
621 | ||
622 | if (inode->i_ino < UFS_ROOTINO || | |
623 | inode->i_ino > (uspi->s_ncg * uspi->s_ipg)) { | |
624 | ufs_warning (sb, "ufs_read_inode", "bad inode number (%lu)\n", inode->i_ino); | |
625 | goto bad_inode; | |
626 | } | |
627 | ||
628 | bh = sb_bread(sb, uspi->s_sbbase + ufs_inotofsba(inode->i_ino)); | |
629 | if (!bh) { | |
630 | ufs_warning (sb, "ufs_read_inode", "unable to read inode %lu\n", inode->i_ino); | |
631 | goto bad_inode; | |
632 | } | |
633 | if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) | |
634 | goto ufs2_inode; | |
635 | ||
636 | ufs_inode = (struct ufs_inode *) (bh->b_data + sizeof(struct ufs_inode) * ufs_inotofsbo(inode->i_ino)); | |
637 | ||
638 | /* | |
639 | * Copy data to the in-core inode. | |
640 | */ | |
641 | inode->i_mode = mode = fs16_to_cpu(sb, ufs_inode->ui_mode); | |
642 | inode->i_nlink = fs16_to_cpu(sb, ufs_inode->ui_nlink); | |
643 | if (inode->i_nlink == 0) | |
644 | ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino); | |
645 | ||
646 | /* | |
647 | * Linux now has 32-bit uid and gid, so we can support EFT. | |
648 | */ | |
649 | inode->i_uid = ufs_get_inode_uid(sb, ufs_inode); | |
650 | inode->i_gid = ufs_get_inode_gid(sb, ufs_inode); | |
651 | ||
652 | inode->i_size = fs64_to_cpu(sb, ufs_inode->ui_size); | |
653 | inode->i_atime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_atime.tv_sec); | |
654 | inode->i_ctime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_ctime.tv_sec); | |
655 | inode->i_mtime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_mtime.tv_sec); | |
656 | inode->i_mtime.tv_nsec = 0; | |
657 | inode->i_atime.tv_nsec = 0; | |
658 | inode->i_ctime.tv_nsec = 0; | |
659 | inode->i_blocks = fs32_to_cpu(sb, ufs_inode->ui_blocks); | |
660 | inode->i_blksize = PAGE_SIZE; /* This is the optimal IO size (for stat) */ | |
661 | inode->i_version++; | |
662 | ufsi->i_flags = fs32_to_cpu(sb, ufs_inode->ui_flags); | |
663 | ufsi->i_gen = fs32_to_cpu(sb, ufs_inode->ui_gen); | |
664 | ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow); | |
665 | ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag); | |
666 | ufsi->i_lastfrag = (inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift; | |
dd187a26 | 667 | ufsi->i_dir_start_lookup = 0; |
1da177e4 LT |
668 | |
669 | if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) { | |
670 | for (i = 0; i < (UFS_NDADDR + UFS_NINDIR); i++) | |
671 | ufsi->i_u1.i_data[i] = ufs_inode->ui_u2.ui_addr.ui_db[i]; | |
dd187a26 | 672 | } else { |
1da177e4 LT |
673 | for (i = 0; i < (UFS_NDADDR + UFS_NINDIR) * 4; i++) |
674 | ufsi->i_u1.i_symlink[i] = ufs_inode->ui_u2.ui_symlink[i]; | |
675 | } | |
676 | ufsi->i_osync = 0; | |
677 | ||
826843a3 | 678 | ufs_set_inode_ops(inode); |
1da177e4 LT |
679 | |
680 | brelse (bh); | |
681 | ||
abf5d15f | 682 | UFSD("EXIT\n"); |
1da177e4 LT |
683 | return; |
684 | ||
685 | bad_inode: | |
686 | make_bad_inode(inode); | |
687 | return; | |
688 | ||
689 | ufs2_inode : | |
abf5d15f | 690 | UFSD("Reading ufs2 inode, ino %lu\n", inode->i_ino); |
1da177e4 LT |
691 | |
692 | ufs2_inode = (struct ufs2_inode *)(bh->b_data + sizeof(struct ufs2_inode) * ufs_inotofsbo(inode->i_ino)); | |
693 | ||
694 | /* | |
695 | * Copy data to the in-core inode. | |
696 | */ | |
697 | inode->i_mode = mode = fs16_to_cpu(sb, ufs2_inode->ui_mode); | |
698 | inode->i_nlink = fs16_to_cpu(sb, ufs2_inode->ui_nlink); | |
699 | if (inode->i_nlink == 0) | |
700 | ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino); | |
701 | ||
702 | /* | |
703 | * Linux now has 32-bit uid and gid, so we can support EFT. | |
704 | */ | |
705 | inode->i_uid = fs32_to_cpu(sb, ufs2_inode->ui_uid); | |
706 | inode->i_gid = fs32_to_cpu(sb, ufs2_inode->ui_gid); | |
707 | ||
708 | inode->i_size = fs64_to_cpu(sb, ufs2_inode->ui_size); | |
709 | inode->i_atime.tv_sec = fs32_to_cpu(sb, ufs2_inode->ui_atime.tv_sec); | |
710 | inode->i_ctime.tv_sec = fs32_to_cpu(sb, ufs2_inode->ui_ctime.tv_sec); | |
711 | inode->i_mtime.tv_sec = fs32_to_cpu(sb, ufs2_inode->ui_mtime.tv_sec); | |
712 | inode->i_mtime.tv_nsec = 0; | |
713 | inode->i_atime.tv_nsec = 0; | |
714 | inode->i_ctime.tv_nsec = 0; | |
715 | inode->i_blocks = fs64_to_cpu(sb, ufs2_inode->ui_blocks); | |
716 | inode->i_blksize = PAGE_SIZE; /*This is the optimal IO size(for stat)*/ | |
717 | ||
718 | inode->i_version++; | |
719 | ufsi->i_flags = fs32_to_cpu(sb, ufs2_inode->ui_flags); | |
720 | ufsi->i_gen = fs32_to_cpu(sb, ufs2_inode->ui_gen); | |
721 | /* | |
722 | ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow); | |
723 | ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag); | |
724 | */ | |
725 | ufsi->i_lastfrag= (inode->i_size + uspi->s_fsize- 1) >> uspi->s_fshift; | |
726 | ||
727 | if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) { | |
728 | for (i = 0; i < (UFS_NDADDR + UFS_NINDIR); i++) | |
729 | ufsi->i_u1.u2_i_data[i] = | |
730 | ufs2_inode->ui_u2.ui_addr.ui_db[i]; | |
731 | } | |
732 | else { | |
733 | for (i = 0; i < (UFS_NDADDR + UFS_NINDIR) * 4; i++) | |
734 | ufsi->i_u1.i_symlink[i] = ufs2_inode->ui_u2.ui_symlink[i]; | |
735 | } | |
736 | ufsi->i_osync = 0; | |
737 | ||
826843a3 | 738 | ufs_set_inode_ops(inode); |
1da177e4 LT |
739 | |
740 | brelse(bh); | |
741 | ||
abf5d15f | 742 | UFSD("EXIT\n"); |
1da177e4 LT |
743 | return; |
744 | } | |
745 | ||
746 | static int ufs_update_inode(struct inode * inode, int do_sync) | |
747 | { | |
748 | struct ufs_inode_info *ufsi = UFS_I(inode); | |
749 | struct super_block * sb; | |
750 | struct ufs_sb_private_info * uspi; | |
751 | struct buffer_head * bh; | |
752 | struct ufs_inode * ufs_inode; | |
753 | unsigned i; | |
754 | unsigned flags; | |
755 | ||
abf5d15f | 756 | UFSD("ENTER, ino %lu\n", inode->i_ino); |
1da177e4 LT |
757 | |
758 | sb = inode->i_sb; | |
759 | uspi = UFS_SB(sb)->s_uspi; | |
760 | flags = UFS_SB(sb)->s_flags; | |
761 | ||
762 | if (inode->i_ino < UFS_ROOTINO || | |
763 | inode->i_ino > (uspi->s_ncg * uspi->s_ipg)) { | |
764 | ufs_warning (sb, "ufs_read_inode", "bad inode number (%lu)\n", inode->i_ino); | |
765 | return -1; | |
766 | } | |
767 | ||
768 | bh = sb_bread(sb, ufs_inotofsba(inode->i_ino)); | |
769 | if (!bh) { | |
770 | ufs_warning (sb, "ufs_read_inode", "unable to read inode %lu\n", inode->i_ino); | |
771 | return -1; | |
772 | } | |
773 | ufs_inode = (struct ufs_inode *) (bh->b_data + ufs_inotofsbo(inode->i_ino) * sizeof(struct ufs_inode)); | |
774 | ||
775 | ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode); | |
776 | ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink); | |
777 | ||
778 | ufs_set_inode_uid(sb, ufs_inode, inode->i_uid); | |
779 | ufs_set_inode_gid(sb, ufs_inode, inode->i_gid); | |
780 | ||
781 | ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size); | |
782 | ufs_inode->ui_atime.tv_sec = cpu_to_fs32(sb, inode->i_atime.tv_sec); | |
783 | ufs_inode->ui_atime.tv_usec = 0; | |
784 | ufs_inode->ui_ctime.tv_sec = cpu_to_fs32(sb, inode->i_ctime.tv_sec); | |
785 | ufs_inode->ui_ctime.tv_usec = 0; | |
786 | ufs_inode->ui_mtime.tv_sec = cpu_to_fs32(sb, inode->i_mtime.tv_sec); | |
787 | ufs_inode->ui_mtime.tv_usec = 0; | |
788 | ufs_inode->ui_blocks = cpu_to_fs32(sb, inode->i_blocks); | |
789 | ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags); | |
790 | ufs_inode->ui_gen = cpu_to_fs32(sb, ufsi->i_gen); | |
791 | ||
792 | if ((flags & UFS_UID_MASK) == UFS_UID_EFT) { | |
793 | ufs_inode->ui_u3.ui_sun.ui_shadow = cpu_to_fs32(sb, ufsi->i_shadow); | |
794 | ufs_inode->ui_u3.ui_sun.ui_oeftflag = cpu_to_fs32(sb, ufsi->i_oeftflag); | |
795 | } | |
796 | ||
797 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { | |
798 | /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */ | |
799 | ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.i_data[0]; | |
800 | } else if (inode->i_blocks) { | |
801 | for (i = 0; i < (UFS_NDADDR + UFS_NINDIR); i++) | |
802 | ufs_inode->ui_u2.ui_addr.ui_db[i] = ufsi->i_u1.i_data[i]; | |
803 | } | |
804 | else { | |
805 | for (i = 0; i < (UFS_NDADDR + UFS_NINDIR) * 4; i++) | |
806 | ufs_inode->ui_u2.ui_symlink[i] = ufsi->i_u1.i_symlink[i]; | |
807 | } | |
808 | ||
809 | if (!inode->i_nlink) | |
810 | memset (ufs_inode, 0, sizeof(struct ufs_inode)); | |
811 | ||
812 | mark_buffer_dirty(bh); | |
813 | if (do_sync) | |
814 | sync_dirty_buffer(bh); | |
815 | brelse (bh); | |
816 | ||
abf5d15f | 817 | UFSD("EXIT\n"); |
1da177e4 LT |
818 | return 0; |
819 | } | |
820 | ||
821 | int ufs_write_inode (struct inode * inode, int wait) | |
822 | { | |
823 | int ret; | |
824 | lock_kernel(); | |
825 | ret = ufs_update_inode (inode, wait); | |
826 | unlock_kernel(); | |
827 | return ret; | |
828 | } | |
829 | ||
830 | int ufs_sync_inode (struct inode *inode) | |
831 | { | |
832 | return ufs_update_inode (inode, 1); | |
833 | } | |
834 | ||
835 | void ufs_delete_inode (struct inode * inode) | |
836 | { | |
fef26658 | 837 | truncate_inode_pages(&inode->i_data, 0); |
1da177e4 LT |
838 | /*UFS_I(inode)->i_dtime = CURRENT_TIME;*/ |
839 | lock_kernel(); | |
840 | mark_inode_dirty(inode); | |
841 | ufs_update_inode(inode, IS_SYNC(inode)); | |
842 | inode->i_size = 0; | |
843 | if (inode->i_blocks) | |
844 | ufs_truncate (inode); | |
845 | ufs_free_inode (inode); | |
846 | unlock_kernel(); | |
847 | } |