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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 | ||
138bb68a AB |
44 | static u64 ufs_frag_map(struct inode *inode, sector_t frag); |
45 | ||
1da177e4 LT |
46 | static int ufs_block_to_path(struct inode *inode, sector_t i_block, sector_t offsets[4]) |
47 | { | |
48 | struct ufs_sb_private_info *uspi = UFS_SB(inode->i_sb)->s_uspi; | |
49 | int ptrs = uspi->s_apb; | |
50 | int ptrs_bits = uspi->s_apbshift; | |
51 | const long direct_blocks = UFS_NDADDR, | |
52 | indirect_blocks = ptrs, | |
53 | double_blocks = (1 << (ptrs_bits * 2)); | |
54 | int n = 0; | |
55 | ||
56 | ||
abf5d15f | 57 | UFSD("ptrs=uspi->s_apb = %d,double_blocks=%ld \n",ptrs,double_blocks); |
1da177e4 LT |
58 | if (i_block < 0) { |
59 | ufs_warning(inode->i_sb, "ufs_block_to_path", "block < 0"); | |
60 | } else if (i_block < direct_blocks) { | |
61 | offsets[n++] = i_block; | |
62 | } else if ((i_block -= direct_blocks) < indirect_blocks) { | |
63 | offsets[n++] = UFS_IND_BLOCK; | |
64 | offsets[n++] = i_block; | |
65 | } else if ((i_block -= indirect_blocks) < double_blocks) { | |
66 | offsets[n++] = UFS_DIND_BLOCK; | |
67 | offsets[n++] = i_block >> ptrs_bits; | |
68 | offsets[n++] = i_block & (ptrs - 1); | |
69 | } else if (((i_block -= double_blocks) >> (ptrs_bits * 2)) < ptrs) { | |
70 | offsets[n++] = UFS_TIND_BLOCK; | |
71 | offsets[n++] = i_block >> (ptrs_bits * 2); | |
72 | offsets[n++] = (i_block >> ptrs_bits) & (ptrs - 1); | |
73 | offsets[n++] = i_block & (ptrs - 1); | |
74 | } else { | |
75 | ufs_warning(inode->i_sb, "ufs_block_to_path", "block > big"); | |
76 | } | |
77 | return n; | |
78 | } | |
79 | ||
80 | /* | |
81 | * Returns the location of the fragment from | |
82 | * the begining of the filesystem. | |
83 | */ | |
84 | ||
138bb68a | 85 | static u64 ufs_frag_map(struct inode *inode, sector_t frag) |
1da177e4 LT |
86 | { |
87 | struct ufs_inode_info *ufsi = UFS_I(inode); | |
88 | struct super_block *sb = inode->i_sb; | |
89 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; | |
90 | u64 mask = (u64) uspi->s_apbmask>>uspi->s_fpbshift; | |
91 | int shift = uspi->s_apbshift-uspi->s_fpbshift; | |
92 | sector_t offsets[4], *p; | |
93 | int depth = ufs_block_to_path(inode, frag >> uspi->s_fpbshift, offsets); | |
94 | u64 ret = 0L; | |
95 | __fs32 block; | |
96 | __fs64 u2_block = 0L; | |
97 | unsigned flags = UFS_SB(sb)->s_flags; | |
98 | u64 temp = 0L; | |
99 | ||
abf5d15f | 100 | UFSD(": frag = %llu depth = %d\n", (unsigned long long)frag, depth); |
7256d819 AM |
101 | UFSD(": uspi->s_fpbshift = %d ,uspi->s_apbmask = %x, mask=%llx\n", |
102 | uspi->s_fpbshift, uspi->s_apbmask, | |
103 | (unsigned long long)mask); | |
1da177e4 LT |
104 | |
105 | if (depth == 0) | |
106 | return 0; | |
107 | ||
108 | p = offsets; | |
109 | ||
110 | lock_kernel(); | |
111 | if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) | |
112 | goto ufs2; | |
113 | ||
114 | block = ufsi->i_u1.i_data[*p++]; | |
115 | if (!block) | |
116 | goto out; | |
117 | while (--depth) { | |
118 | struct buffer_head *bh; | |
119 | sector_t n = *p++; | |
120 | ||
121 | bh = sb_bread(sb, uspi->s_sbbase + fs32_to_cpu(sb, block)+(n>>shift)); | |
122 | if (!bh) | |
123 | goto out; | |
124 | block = ((__fs32 *) bh->b_data)[n & mask]; | |
125 | brelse (bh); | |
126 | if (!block) | |
127 | goto out; | |
128 | } | |
129 | ret = (u64) (uspi->s_sbbase + fs32_to_cpu(sb, block) + (frag & uspi->s_fpbmask)); | |
130 | goto out; | |
131 | ufs2: | |
132 | u2_block = ufsi->i_u1.u2_i_data[*p++]; | |
133 | if (!u2_block) | |
134 | goto out; | |
135 | ||
136 | ||
137 | while (--depth) { | |
138 | struct buffer_head *bh; | |
139 | sector_t n = *p++; | |
140 | ||
141 | ||
142 | temp = (u64)(uspi->s_sbbase) + fs64_to_cpu(sb, u2_block); | |
143 | bh = sb_bread(sb, temp +(u64) (n>>shift)); | |
144 | if (!bh) | |
145 | goto out; | |
146 | u2_block = ((__fs64 *)bh->b_data)[n & mask]; | |
147 | brelse(bh); | |
148 | if (!u2_block) | |
149 | goto out; | |
150 | } | |
151 | temp = (u64)uspi->s_sbbase + fs64_to_cpu(sb, u2_block); | |
152 | ret = temp + (u64) (frag & uspi->s_fpbmask); | |
153 | ||
154 | out: | |
155 | unlock_kernel(); | |
156 | return ret; | |
157 | } | |
158 | ||
022a6dc5 | 159 | static void ufs_clear_frag(struct inode *inode, struct buffer_head *bh) |
c9a27b5d ED |
160 | { |
161 | lock_buffer(bh); | |
162 | memset(bh->b_data, 0, inode->i_sb->s_blocksize); | |
163 | set_buffer_uptodate(bh); | |
164 | mark_buffer_dirty(bh); | |
165 | unlock_buffer(bh); | |
166 | if (IS_SYNC(inode)) | |
167 | sync_dirty_buffer(bh); | |
168 | } | |
169 | ||
022a6dc5 ED |
170 | static struct buffer_head * |
171 | ufs_clear_frags(struct inode *inode, sector_t beg, | |
172 | unsigned int n) | |
173 | { | |
174 | struct buffer_head *res, *bh; | |
175 | sector_t end = beg + n; | |
176 | ||
177 | res = sb_getblk(inode->i_sb, beg); | |
178 | ufs_clear_frag(inode, res); | |
179 | for (++beg; beg < end; ++beg) { | |
180 | bh = sb_getblk(inode->i_sb, beg); | |
181 | ufs_clear_frag(inode, bh); | |
f3914758 | 182 | brelse(bh); |
022a6dc5 ED |
183 | } |
184 | return res; | |
185 | } | |
186 | ||
187 | /** | |
188 | * ufs_inode_getfrag() - allocate new fragment(s) | |
189 | * @inode - pointer to inode | |
190 | * @fragment - number of `fragment' which hold pointer | |
191 | * to new allocated fragment(s) | |
192 | * @new_fragment - number of new allocated fragment(s) | |
193 | * @required - how many fragment(s) we require | |
194 | * @err - we set it if something wrong | |
195 | * @phys - pointer to where we save physical number of new allocated fragments, | |
196 | * NULL if we allocate not data(indirect blocks for example). | |
197 | * @new - we set it if we allocate new block | |
198 | * @locked_page - for ufs_new_fragments() | |
199 | */ | |
200 | static struct buffer_head * | |
201 | ufs_inode_getfrag(struct inode *inode, unsigned int fragment, | |
202 | sector_t new_fragment, unsigned int required, int *err, | |
203 | long *phys, int *new, struct page *locked_page) | |
1da177e4 LT |
204 | { |
205 | struct ufs_inode_info *ufsi = UFS_I(inode); | |
022a6dc5 ED |
206 | struct super_block *sb = inode->i_sb; |
207 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; | |
1da177e4 LT |
208 | struct buffer_head * result; |
209 | unsigned block, blockoff, lastfrag, lastblock, lastblockoff; | |
210 | unsigned tmp, goal; | |
211 | __fs32 * p, * p2; | |
1da177e4 | 212 | |
022a6dc5 ED |
213 | UFSD("ENTER, ino %lu, fragment %u, new_fragment %llu, required %u, " |
214 | "metadata %d\n", inode->i_ino, fragment, | |
215 | (unsigned long long)new_fragment, required, !phys); | |
1da177e4 | 216 | |
1da177e4 LT |
217 | /* TODO : to be done for write support |
218 | if ( (flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) | |
219 | goto ufs2; | |
220 | */ | |
221 | ||
222 | block = ufs_fragstoblks (fragment); | |
223 | blockoff = ufs_fragnum (fragment); | |
224 | p = ufsi->i_u1.i_data + block; | |
225 | goal = 0; | |
226 | ||
227 | repeat: | |
228 | tmp = fs32_to_cpu(sb, *p); | |
229 | lastfrag = ufsi->i_lastfrag; | |
230 | if (tmp && fragment < lastfrag) { | |
022a6dc5 | 231 | if (!phys) { |
1da177e4 LT |
232 | result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff); |
233 | if (tmp == fs32_to_cpu(sb, *p)) { | |
abf5d15f | 234 | UFSD("EXIT, result %u\n", tmp + blockoff); |
1da177e4 LT |
235 | return result; |
236 | } | |
237 | brelse (result); | |
238 | goto repeat; | |
239 | } else { | |
c9a27b5d | 240 | *phys = tmp + blockoff; |
1da177e4 LT |
241 | return NULL; |
242 | } | |
243 | } | |
244 | ||
245 | lastblock = ufs_fragstoblks (lastfrag); | |
246 | lastblockoff = ufs_fragnum (lastfrag); | |
247 | /* | |
248 | * We will extend file into new block beyond last allocated block | |
249 | */ | |
250 | if (lastblock < block) { | |
251 | /* | |
252 | * We must reallocate last allocated block | |
253 | */ | |
254 | if (lastblockoff) { | |
255 | p2 = ufsi->i_u1.i_data + lastblock; | |
256 | tmp = ufs_new_fragments (inode, p2, lastfrag, | |
6ef4d6bf ED |
257 | fs32_to_cpu(sb, *p2), uspi->s_fpb - lastblockoff, |
258 | err, locked_page); | |
1da177e4 LT |
259 | if (!tmp) { |
260 | if (lastfrag != ufsi->i_lastfrag) | |
261 | goto repeat; | |
262 | else | |
263 | return NULL; | |
264 | } | |
265 | lastfrag = ufsi->i_lastfrag; | |
266 | ||
267 | } | |
268 | goal = fs32_to_cpu(sb, ufsi->i_u1.i_data[lastblock]) + uspi->s_fpb; | |
269 | tmp = ufs_new_fragments (inode, p, fragment - blockoff, | |
6ef4d6bf ED |
270 | goal, required + blockoff, |
271 | err, locked_page); | |
1da177e4 LT |
272 | } |
273 | /* | |
274 | * We will extend last allocated block | |
275 | */ | |
276 | else if (lastblock == block) { | |
6ef4d6bf ED |
277 | tmp = ufs_new_fragments(inode, p, fragment - (blockoff - lastblockoff), |
278 | fs32_to_cpu(sb, *p), required + (blockoff - lastblockoff), | |
279 | err, locked_page); | |
1da177e4 LT |
280 | } |
281 | /* | |
282 | * We will allocate new block before last allocated block | |
283 | */ | |
284 | else /* (lastblock > block) */ { | |
285 | if (lastblock && (tmp = fs32_to_cpu(sb, ufsi->i_u1.i_data[lastblock-1]))) | |
286 | goal = tmp + uspi->s_fpb; | |
6ef4d6bf ED |
287 | tmp = ufs_new_fragments(inode, p, fragment - blockoff, |
288 | goal, uspi->s_fpb, err, locked_page); | |
1da177e4 LT |
289 | } |
290 | if (!tmp) { | |
291 | if ((!blockoff && *p) || | |
292 | (blockoff && lastfrag != ufsi->i_lastfrag)) | |
293 | goto repeat; | |
294 | *err = -ENOSPC; | |
295 | return NULL; | |
296 | } | |
297 | ||
022a6dc5 ED |
298 | if (!phys) { |
299 | result = ufs_clear_frags(inode, tmp + blockoff, required); | |
1da177e4 | 300 | } else { |
c9a27b5d | 301 | *phys = tmp + blockoff; |
1da177e4 LT |
302 | result = NULL; |
303 | *err = 0; | |
304 | *new = 1; | |
305 | } | |
306 | ||
307 | inode->i_ctime = CURRENT_TIME_SEC; | |
308 | if (IS_SYNC(inode)) | |
309 | ufs_sync_inode (inode); | |
310 | mark_inode_dirty(inode); | |
abf5d15f | 311 | UFSD("EXIT, result %u\n", tmp + blockoff); |
1da177e4 LT |
312 | return result; |
313 | ||
314 | /* This part : To be implemented .... | |
315 | Required only for writing, not required for READ-ONLY. | |
316 | ufs2: | |
317 | ||
318 | u2_block = ufs_fragstoblks(fragment); | |
319 | u2_blockoff = ufs_fragnum(fragment); | |
320 | p = ufsi->i_u1.u2_i_data + block; | |
321 | goal = 0; | |
322 | ||
323 | repeat2: | |
324 | tmp = fs32_to_cpu(sb, *p); | |
325 | lastfrag = ufsi->i_lastfrag; | |
326 | ||
327 | */ | |
328 | } | |
329 | ||
022a6dc5 ED |
330 | /** |
331 | * ufs_inode_getblock() - allocate new block | |
332 | * @inode - pointer to inode | |
333 | * @bh - pointer to block which hold "pointer" to new allocated block | |
334 | * @fragment - number of `fragment' which hold pointer | |
335 | * to new allocated block | |
336 | * @new_fragment - number of new allocated fragment | |
337 | * (block will hold this fragment and also uspi->s_fpb-1) | |
338 | * @err - see ufs_inode_getfrag() | |
339 | * @phys - see ufs_inode_getfrag() | |
340 | * @new - see ufs_inode_getfrag() | |
341 | * @locked_page - see ufs_inode_getfrag() | |
342 | */ | |
343 | static struct buffer_head * | |
344 | ufs_inode_getblock(struct inode *inode, struct buffer_head *bh, | |
345 | unsigned int fragment, sector_t new_fragment, int *err, | |
346 | long *phys, int *new, struct page *locked_page) | |
1da177e4 | 347 | { |
022a6dc5 ED |
348 | struct super_block *sb = inode->i_sb; |
349 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; | |
1da177e4 LT |
350 | struct buffer_head * result; |
351 | unsigned tmp, goal, block, blockoff; | |
352 | __fs32 * p; | |
353 | ||
1da177e4 LT |
354 | block = ufs_fragstoblks (fragment); |
355 | blockoff = ufs_fragnum (fragment); | |
356 | ||
022a6dc5 ED |
357 | UFSD("ENTER, ino %lu, fragment %u, new_fragment %llu, metadata %d\n", |
358 | inode->i_ino, fragment, (unsigned long long)new_fragment, !phys); | |
1da177e4 LT |
359 | |
360 | result = NULL; | |
361 | if (!bh) | |
362 | goto out; | |
363 | if (!buffer_uptodate(bh)) { | |
364 | ll_rw_block (READ, 1, &bh); | |
365 | wait_on_buffer (bh); | |
366 | if (!buffer_uptodate(bh)) | |
367 | goto out; | |
368 | } | |
369 | ||
370 | p = (__fs32 *) bh->b_data + block; | |
371 | repeat: | |
372 | tmp = fs32_to_cpu(sb, *p); | |
373 | if (tmp) { | |
022a6dc5 | 374 | if (!phys) { |
1da177e4 LT |
375 | result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff); |
376 | if (tmp == fs32_to_cpu(sb, *p)) | |
377 | goto out; | |
378 | brelse (result); | |
379 | goto repeat; | |
380 | } else { | |
c9a27b5d | 381 | *phys = tmp + blockoff; |
1da177e4 LT |
382 | goto out; |
383 | } | |
384 | } | |
385 | ||
386 | if (block && (tmp = fs32_to_cpu(sb, ((__fs32*)bh->b_data)[block-1]) + uspi->s_fpb)) | |
387 | goal = tmp + uspi->s_fpb; | |
388 | else | |
389 | goal = bh->b_blocknr + uspi->s_fpb; | |
6ef4d6bf ED |
390 | tmp = ufs_new_fragments(inode, p, ufs_blknum(new_fragment), goal, |
391 | uspi->s_fpb, err, locked_page); | |
1da177e4 LT |
392 | if (!tmp) { |
393 | if (fs32_to_cpu(sb, *p)) | |
394 | goto repeat; | |
395 | goto out; | |
396 | } | |
397 | ||
c9a27b5d | 398 | |
022a6dc5 ED |
399 | if (!phys) { |
400 | result = ufs_clear_frags(inode, tmp + blockoff, uspi->s_fpb); | |
1da177e4 | 401 | } else { |
c9a27b5d | 402 | *phys = tmp + blockoff; |
1da177e4 LT |
403 | *new = 1; |
404 | } | |
405 | ||
406 | mark_buffer_dirty(bh); | |
407 | if (IS_SYNC(inode)) | |
408 | sync_dirty_buffer(bh); | |
409 | inode->i_ctime = CURRENT_TIME_SEC; | |
410 | mark_inode_dirty(inode); | |
abf5d15f | 411 | UFSD("result %u\n", tmp + blockoff); |
1da177e4 LT |
412 | out: |
413 | brelse (bh); | |
abf5d15f | 414 | UFSD("EXIT\n"); |
1da177e4 LT |
415 | return result; |
416 | } | |
417 | ||
022a6dc5 ED |
418 | /** |
419 | * ufs_getfrag_bloc() - `get_block_t' function, interface between UFS and | |
420 | * readpage, writepage and so on | |
1da177e4 LT |
421 | */ |
422 | ||
022a6dc5 | 423 | int ufs_getfrag_block(struct inode *inode, sector_t fragment, struct buffer_head *bh_result, int create) |
1da177e4 LT |
424 | { |
425 | struct super_block * sb = inode->i_sb; | |
426 | struct ufs_sb_private_info * uspi = UFS_SB(sb)->s_uspi; | |
427 | struct buffer_head * bh; | |
428 | int ret, err, new; | |
429 | unsigned long ptr,phys; | |
430 | u64 phys64 = 0; | |
431 | ||
432 | if (!create) { | |
433 | phys64 = ufs_frag_map(inode, fragment); | |
7256d819 | 434 | UFSD("phys64 = %llu\n", (unsigned long long)phys64); |
1da177e4 LT |
435 | if (phys64) |
436 | map_bh(bh_result, sb, phys64); | |
437 | return 0; | |
438 | } | |
439 | ||
440 | /* This code entered only while writing ....? */ | |
441 | ||
442 | err = -EIO; | |
443 | new = 0; | |
444 | ret = 0; | |
445 | bh = NULL; | |
446 | ||
447 | lock_kernel(); | |
448 | ||
abf5d15f | 449 | UFSD("ENTER, ino %lu, fragment %llu\n", inode->i_ino, (unsigned long long)fragment); |
1da177e4 LT |
450 | if (fragment < 0) |
451 | goto abort_negative; | |
452 | if (fragment > | |
453 | ((UFS_NDADDR + uspi->s_apb + uspi->s_2apb + uspi->s_3apb) | |
454 | << uspi->s_fpbshift)) | |
455 | goto abort_too_big; | |
456 | ||
457 | err = 0; | |
458 | ptr = fragment; | |
459 | ||
460 | /* | |
461 | * ok, these macros clean the logic up a bit and make | |
462 | * it much more readable: | |
463 | */ | |
464 | #define GET_INODE_DATABLOCK(x) \ | |
022a6dc5 | 465 | ufs_inode_getfrag(inode, x, fragment, 1, &err, &phys, &new, bh_result->b_page) |
1da177e4 | 466 | #define GET_INODE_PTR(x) \ |
022a6dc5 | 467 | ufs_inode_getfrag(inode, x, fragment, uspi->s_fpb, &err, NULL, NULL, bh_result->b_page) |
1da177e4 | 468 | #define GET_INDIRECT_DATABLOCK(x) \ |
022a6dc5 ED |
469 | ufs_inode_getblock(inode, bh, x, fragment, \ |
470 | &err, &phys, &new, bh_result->b_page); | |
1da177e4 | 471 | #define GET_INDIRECT_PTR(x) \ |
022a6dc5 ED |
472 | ufs_inode_getblock(inode, bh, x, fragment, \ |
473 | &err, NULL, NULL, bh_result->b_page); | |
1da177e4 LT |
474 | |
475 | if (ptr < UFS_NDIR_FRAGMENT) { | |
476 | bh = GET_INODE_DATABLOCK(ptr); | |
477 | goto out; | |
478 | } | |
479 | ptr -= UFS_NDIR_FRAGMENT; | |
480 | if (ptr < (1 << (uspi->s_apbshift + uspi->s_fpbshift))) { | |
481 | bh = GET_INODE_PTR(UFS_IND_FRAGMENT + (ptr >> uspi->s_apbshift)); | |
482 | goto get_indirect; | |
483 | } | |
484 | ptr -= 1 << (uspi->s_apbshift + uspi->s_fpbshift); | |
485 | if (ptr < (1 << (uspi->s_2apbshift + uspi->s_fpbshift))) { | |
486 | bh = GET_INODE_PTR(UFS_DIND_FRAGMENT + (ptr >> uspi->s_2apbshift)); | |
487 | goto get_double; | |
488 | } | |
489 | ptr -= 1 << (uspi->s_2apbshift + uspi->s_fpbshift); | |
490 | bh = GET_INODE_PTR(UFS_TIND_FRAGMENT + (ptr >> uspi->s_3apbshift)); | |
491 | bh = GET_INDIRECT_PTR((ptr >> uspi->s_2apbshift) & uspi->s_apbmask); | |
492 | get_double: | |
493 | bh = GET_INDIRECT_PTR((ptr >> uspi->s_apbshift) & uspi->s_apbmask); | |
494 | get_indirect: | |
495 | bh = GET_INDIRECT_DATABLOCK(ptr & uspi->s_apbmask); | |
496 | ||
497 | #undef GET_INODE_DATABLOCK | |
498 | #undef GET_INODE_PTR | |
499 | #undef GET_INDIRECT_DATABLOCK | |
500 | #undef GET_INDIRECT_PTR | |
501 | ||
502 | out: | |
503 | if (err) | |
504 | goto abort; | |
505 | if (new) | |
506 | set_buffer_new(bh_result); | |
507 | map_bh(bh_result, sb, phys); | |
508 | abort: | |
509 | unlock_kernel(); | |
510 | return err; | |
511 | ||
512 | abort_negative: | |
513 | ufs_warning(sb, "ufs_get_block", "block < 0"); | |
514 | goto abort; | |
515 | ||
516 | abort_too_big: | |
517 | ufs_warning(sb, "ufs_get_block", "block > big"); | |
518 | goto abort; | |
519 | } | |
520 | ||
138bb68a AB |
521 | static struct buffer_head *ufs_getfrag(struct inode *inode, |
522 | unsigned int fragment, | |
523 | int create, int *err) | |
1da177e4 LT |
524 | { |
525 | struct buffer_head dummy; | |
526 | int error; | |
527 | ||
528 | dummy.b_state = 0; | |
529 | dummy.b_blocknr = -1000; | |
530 | error = ufs_getfrag_block(inode, fragment, &dummy, create); | |
531 | *err = error; | |
532 | if (!error && buffer_mapped(&dummy)) { | |
533 | struct buffer_head *bh; | |
534 | bh = sb_getblk(inode->i_sb, dummy.b_blocknr); | |
535 | if (buffer_new(&dummy)) { | |
536 | memset(bh->b_data, 0, inode->i_sb->s_blocksize); | |
537 | set_buffer_uptodate(bh); | |
538 | mark_buffer_dirty(bh); | |
539 | } | |
540 | return bh; | |
541 | } | |
542 | return NULL; | |
543 | } | |
544 | ||
545 | struct buffer_head * ufs_bread (struct inode * inode, unsigned fragment, | |
546 | int create, int * err) | |
547 | { | |
548 | struct buffer_head * bh; | |
549 | ||
abf5d15f | 550 | UFSD("ENTER, ino %lu, fragment %u\n", inode->i_ino, fragment); |
1da177e4 LT |
551 | bh = ufs_getfrag (inode, fragment, create, err); |
552 | if (!bh || buffer_uptodate(bh)) | |
553 | return bh; | |
554 | ll_rw_block (READ, 1, &bh); | |
555 | wait_on_buffer (bh); | |
556 | if (buffer_uptodate(bh)) | |
557 | return bh; | |
558 | brelse (bh); | |
559 | *err = -EIO; | |
560 | return NULL; | |
561 | } | |
562 | ||
563 | static int ufs_writepage(struct page *page, struct writeback_control *wbc) | |
564 | { | |
565 | return block_write_full_page(page,ufs_getfrag_block,wbc); | |
566 | } | |
567 | static int ufs_readpage(struct file *file, struct page *page) | |
568 | { | |
569 | return block_read_full_page(page,ufs_getfrag_block); | |
570 | } | |
571 | static int ufs_prepare_write(struct file *file, struct page *page, unsigned from, unsigned to) | |
572 | { | |
573 | return block_prepare_write(page,from,to,ufs_getfrag_block); | |
574 | } | |
575 | static sector_t ufs_bmap(struct address_space *mapping, sector_t block) | |
576 | { | |
577 | return generic_block_bmap(mapping,block,ufs_getfrag_block); | |
578 | } | |
f5e54d6e | 579 | const struct address_space_operations ufs_aops = { |
1da177e4 LT |
580 | .readpage = ufs_readpage, |
581 | .writepage = ufs_writepage, | |
582 | .sync_page = block_sync_page, | |
583 | .prepare_write = ufs_prepare_write, | |
584 | .commit_write = generic_commit_write, | |
585 | .bmap = ufs_bmap | |
586 | }; | |
587 | ||
826843a3 ED |
588 | static void ufs_set_inode_ops(struct inode *inode) |
589 | { | |
590 | if (S_ISREG(inode->i_mode)) { | |
591 | inode->i_op = &ufs_file_inode_operations; | |
592 | inode->i_fop = &ufs_file_operations; | |
593 | inode->i_mapping->a_ops = &ufs_aops; | |
594 | } else if (S_ISDIR(inode->i_mode)) { | |
595 | inode->i_op = &ufs_dir_inode_operations; | |
596 | inode->i_fop = &ufs_dir_operations; | |
597 | inode->i_mapping->a_ops = &ufs_aops; | |
598 | } else if (S_ISLNK(inode->i_mode)) { | |
599 | if (!inode->i_blocks) | |
600 | inode->i_op = &ufs_fast_symlink_inode_operations; | |
601 | else { | |
602 | inode->i_op = &page_symlink_inode_operations; | |
603 | inode->i_mapping->a_ops = &ufs_aops; | |
604 | } | |
605 | } else | |
606 | init_special_inode(inode, inode->i_mode, | |
607 | ufs_get_inode_dev(inode->i_sb, UFS_I(inode))); | |
608 | } | |
609 | ||
05f225dc | 610 | static void ufs1_read_inode(struct inode *inode, struct ufs_inode *ufs_inode) |
1da177e4 LT |
611 | { |
612 | struct ufs_inode_info *ufsi = UFS_I(inode); | |
05f225dc | 613 | struct super_block *sb = inode->i_sb; |
1da177e4 LT |
614 | mode_t mode; |
615 | unsigned i; | |
1da177e4 LT |
616 | |
617 | /* | |
618 | * Copy data to the in-core inode. | |
619 | */ | |
620 | inode->i_mode = mode = fs16_to_cpu(sb, ufs_inode->ui_mode); | |
621 | inode->i_nlink = fs16_to_cpu(sb, ufs_inode->ui_nlink); | |
622 | if (inode->i_nlink == 0) | |
623 | ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino); | |
624 | ||
625 | /* | |
626 | * Linux now has 32-bit uid and gid, so we can support EFT. | |
627 | */ | |
628 | inode->i_uid = ufs_get_inode_uid(sb, ufs_inode); | |
629 | inode->i_gid = ufs_get_inode_gid(sb, ufs_inode); | |
630 | ||
631 | inode->i_size = fs64_to_cpu(sb, ufs_inode->ui_size); | |
632 | inode->i_atime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_atime.tv_sec); | |
633 | inode->i_ctime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_ctime.tv_sec); | |
634 | inode->i_mtime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_mtime.tv_sec); | |
635 | inode->i_mtime.tv_nsec = 0; | |
636 | inode->i_atime.tv_nsec = 0; | |
637 | inode->i_ctime.tv_nsec = 0; | |
638 | inode->i_blocks = fs32_to_cpu(sb, ufs_inode->ui_blocks); | |
1da177e4 LT |
639 | ufsi->i_flags = fs32_to_cpu(sb, ufs_inode->ui_flags); |
640 | ufsi->i_gen = fs32_to_cpu(sb, ufs_inode->ui_gen); | |
641 | ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow); | |
642 | ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag); | |
05f225dc | 643 | |
1da177e4 LT |
644 | |
645 | if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) { | |
646 | for (i = 0; i < (UFS_NDADDR + UFS_NINDIR); i++) | |
647 | ufsi->i_u1.i_data[i] = ufs_inode->ui_u2.ui_addr.ui_db[i]; | |
dd187a26 | 648 | } else { |
1da177e4 LT |
649 | for (i = 0; i < (UFS_NDADDR + UFS_NINDIR) * 4; i++) |
650 | ufsi->i_u1.i_symlink[i] = ufs_inode->ui_u2.ui_symlink[i]; | |
651 | } | |
05f225dc | 652 | } |
1da177e4 | 653 | |
05f225dc ED |
654 | static void ufs2_read_inode(struct inode *inode, struct ufs2_inode *ufs2_inode) |
655 | { | |
656 | struct ufs_inode_info *ufsi = UFS_I(inode); | |
657 | struct super_block *sb = inode->i_sb; | |
658 | mode_t mode; | |
659 | unsigned i; | |
1da177e4 | 660 | |
abf5d15f | 661 | UFSD("Reading ufs2 inode, ino %lu\n", inode->i_ino); |
1da177e4 LT |
662 | /* |
663 | * Copy data to the in-core inode. | |
664 | */ | |
665 | inode->i_mode = mode = fs16_to_cpu(sb, ufs2_inode->ui_mode); | |
666 | inode->i_nlink = fs16_to_cpu(sb, ufs2_inode->ui_nlink); | |
667 | if (inode->i_nlink == 0) | |
668 | ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino); | |
669 | ||
670 | /* | |
671 | * Linux now has 32-bit uid and gid, so we can support EFT. | |
672 | */ | |
673 | inode->i_uid = fs32_to_cpu(sb, ufs2_inode->ui_uid); | |
674 | inode->i_gid = fs32_to_cpu(sb, ufs2_inode->ui_gid); | |
675 | ||
676 | inode->i_size = fs64_to_cpu(sb, ufs2_inode->ui_size); | |
677 | inode->i_atime.tv_sec = fs32_to_cpu(sb, ufs2_inode->ui_atime.tv_sec); | |
678 | inode->i_ctime.tv_sec = fs32_to_cpu(sb, ufs2_inode->ui_ctime.tv_sec); | |
679 | inode->i_mtime.tv_sec = fs32_to_cpu(sb, ufs2_inode->ui_mtime.tv_sec); | |
680 | inode->i_mtime.tv_nsec = 0; | |
681 | inode->i_atime.tv_nsec = 0; | |
682 | inode->i_ctime.tv_nsec = 0; | |
683 | inode->i_blocks = fs64_to_cpu(sb, ufs2_inode->ui_blocks); | |
1da177e4 LT |
684 | ufsi->i_flags = fs32_to_cpu(sb, ufs2_inode->ui_flags); |
685 | ufsi->i_gen = fs32_to_cpu(sb, ufs2_inode->ui_gen); | |
686 | /* | |
687 | ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow); | |
688 | ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag); | |
689 | */ | |
1da177e4 LT |
690 | |
691 | if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) { | |
692 | for (i = 0; i < (UFS_NDADDR + UFS_NINDIR); i++) | |
693 | ufsi->i_u1.u2_i_data[i] = | |
694 | ufs2_inode->ui_u2.ui_addr.ui_db[i]; | |
05f225dc | 695 | } else { |
1da177e4 LT |
696 | for (i = 0; i < (UFS_NDADDR + UFS_NINDIR) * 4; i++) |
697 | ufsi->i_u1.i_symlink[i] = ufs2_inode->ui_u2.ui_symlink[i]; | |
698 | } | |
05f225dc ED |
699 | } |
700 | ||
701 | void ufs_read_inode(struct inode * inode) | |
702 | { | |
703 | struct ufs_inode_info *ufsi = UFS_I(inode); | |
704 | struct super_block * sb; | |
705 | struct ufs_sb_private_info * uspi; | |
706 | struct buffer_head * bh; | |
707 | ||
708 | UFSD("ENTER, ino %lu\n", inode->i_ino); | |
709 | ||
710 | sb = inode->i_sb; | |
711 | uspi = UFS_SB(sb)->s_uspi; | |
712 | ||
713 | if (inode->i_ino < UFS_ROOTINO || | |
714 | inode->i_ino > (uspi->s_ncg * uspi->s_ipg)) { | |
715 | ufs_warning(sb, "ufs_read_inode", "bad inode number (%lu)\n", | |
716 | inode->i_ino); | |
717 | goto bad_inode; | |
718 | } | |
719 | ||
720 | bh = sb_bread(sb, uspi->s_sbbase + ufs_inotofsba(inode->i_ino)); | |
721 | if (!bh) { | |
722 | ufs_warning(sb, "ufs_read_inode", "unable to read inode %lu\n", | |
723 | inode->i_ino); | |
724 | goto bad_inode; | |
725 | } | |
726 | if ((UFS_SB(sb)->s_flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { | |
727 | struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data; | |
728 | ||
729 | ufs2_read_inode(inode, | |
730 | ufs2_inode + ufs_inotofsbo(inode->i_ino)); | |
731 | } else { | |
732 | struct ufs_inode *ufs_inode = (struct ufs_inode *)bh->b_data; | |
733 | ||
734 | ufs1_read_inode(inode, ufs_inode + ufs_inotofsbo(inode->i_ino)); | |
735 | } | |
736 | ||
737 | inode->i_blksize = PAGE_SIZE;/*This is the optimal IO size (for stat)*/ | |
738 | inode->i_version++; | |
739 | ufsi->i_lastfrag = | |
740 | (inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift; | |
741 | ufsi->i_dir_start_lookup = 0; | |
1da177e4 LT |
742 | ufsi->i_osync = 0; |
743 | ||
826843a3 | 744 | ufs_set_inode_ops(inode); |
1da177e4 LT |
745 | |
746 | brelse(bh); | |
747 | ||
abf5d15f | 748 | UFSD("EXIT\n"); |
1da177e4 | 749 | return; |
05f225dc ED |
750 | |
751 | bad_inode: | |
752 | make_bad_inode(inode); | |
1da177e4 LT |
753 | } |
754 | ||
755 | static int ufs_update_inode(struct inode * inode, int do_sync) | |
756 | { | |
757 | struct ufs_inode_info *ufsi = UFS_I(inode); | |
758 | struct super_block * sb; | |
759 | struct ufs_sb_private_info * uspi; | |
760 | struct buffer_head * bh; | |
761 | struct ufs_inode * ufs_inode; | |
762 | unsigned i; | |
763 | unsigned flags; | |
764 | ||
abf5d15f | 765 | UFSD("ENTER, ino %lu\n", inode->i_ino); |
1da177e4 LT |
766 | |
767 | sb = inode->i_sb; | |
768 | uspi = UFS_SB(sb)->s_uspi; | |
769 | flags = UFS_SB(sb)->s_flags; | |
770 | ||
771 | if (inode->i_ino < UFS_ROOTINO || | |
772 | inode->i_ino > (uspi->s_ncg * uspi->s_ipg)) { | |
773 | ufs_warning (sb, "ufs_read_inode", "bad inode number (%lu)\n", inode->i_ino); | |
774 | return -1; | |
775 | } | |
776 | ||
777 | bh = sb_bread(sb, ufs_inotofsba(inode->i_ino)); | |
778 | if (!bh) { | |
779 | ufs_warning (sb, "ufs_read_inode", "unable to read inode %lu\n", inode->i_ino); | |
780 | return -1; | |
781 | } | |
782 | ufs_inode = (struct ufs_inode *) (bh->b_data + ufs_inotofsbo(inode->i_ino) * sizeof(struct ufs_inode)); | |
783 | ||
784 | ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode); | |
785 | ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink); | |
786 | ||
787 | ufs_set_inode_uid(sb, ufs_inode, inode->i_uid); | |
788 | ufs_set_inode_gid(sb, ufs_inode, inode->i_gid); | |
789 | ||
790 | ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size); | |
791 | ufs_inode->ui_atime.tv_sec = cpu_to_fs32(sb, inode->i_atime.tv_sec); | |
792 | ufs_inode->ui_atime.tv_usec = 0; | |
793 | ufs_inode->ui_ctime.tv_sec = cpu_to_fs32(sb, inode->i_ctime.tv_sec); | |
794 | ufs_inode->ui_ctime.tv_usec = 0; | |
795 | ufs_inode->ui_mtime.tv_sec = cpu_to_fs32(sb, inode->i_mtime.tv_sec); | |
796 | ufs_inode->ui_mtime.tv_usec = 0; | |
797 | ufs_inode->ui_blocks = cpu_to_fs32(sb, inode->i_blocks); | |
798 | ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags); | |
799 | ufs_inode->ui_gen = cpu_to_fs32(sb, ufsi->i_gen); | |
800 | ||
801 | if ((flags & UFS_UID_MASK) == UFS_UID_EFT) { | |
802 | ufs_inode->ui_u3.ui_sun.ui_shadow = cpu_to_fs32(sb, ufsi->i_shadow); | |
803 | ufs_inode->ui_u3.ui_sun.ui_oeftflag = cpu_to_fs32(sb, ufsi->i_oeftflag); | |
804 | } | |
805 | ||
806 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { | |
807 | /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */ | |
808 | ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.i_data[0]; | |
809 | } else if (inode->i_blocks) { | |
810 | for (i = 0; i < (UFS_NDADDR + UFS_NINDIR); i++) | |
811 | ufs_inode->ui_u2.ui_addr.ui_db[i] = ufsi->i_u1.i_data[i]; | |
812 | } | |
813 | else { | |
814 | for (i = 0; i < (UFS_NDADDR + UFS_NINDIR) * 4; i++) | |
815 | ufs_inode->ui_u2.ui_symlink[i] = ufsi->i_u1.i_symlink[i]; | |
816 | } | |
817 | ||
818 | if (!inode->i_nlink) | |
819 | memset (ufs_inode, 0, sizeof(struct ufs_inode)); | |
820 | ||
821 | mark_buffer_dirty(bh); | |
822 | if (do_sync) | |
823 | sync_dirty_buffer(bh); | |
824 | brelse (bh); | |
825 | ||
abf5d15f | 826 | UFSD("EXIT\n"); |
1da177e4 LT |
827 | return 0; |
828 | } | |
829 | ||
830 | int ufs_write_inode (struct inode * inode, int wait) | |
831 | { | |
832 | int ret; | |
833 | lock_kernel(); | |
834 | ret = ufs_update_inode (inode, wait); | |
835 | unlock_kernel(); | |
836 | return ret; | |
837 | } | |
838 | ||
839 | int ufs_sync_inode (struct inode *inode) | |
840 | { | |
841 | return ufs_update_inode (inode, 1); | |
842 | } | |
843 | ||
844 | void ufs_delete_inode (struct inode * inode) | |
845 | { | |
10e5dce0 ED |
846 | loff_t old_i_size; |
847 | ||
fef26658 | 848 | truncate_inode_pages(&inode->i_data, 0); |
1da177e4 LT |
849 | /*UFS_I(inode)->i_dtime = CURRENT_TIME;*/ |
850 | lock_kernel(); | |
851 | mark_inode_dirty(inode); | |
852 | ufs_update_inode(inode, IS_SYNC(inode)); | |
10e5dce0 | 853 | old_i_size = inode->i_size; |
1da177e4 | 854 | inode->i_size = 0; |
10e5dce0 ED |
855 | if (inode->i_blocks && ufs_truncate(inode, old_i_size)) |
856 | ufs_warning(inode->i_sb, __FUNCTION__, "ufs_truncate failed\n"); | |
1da177e4 LT |
857 | ufs_free_inode (inode); |
858 | unlock_kernel(); | |
859 | } |