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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 ED |
159 | /** |
160 | * ufs_inode_getfrag() - allocate new fragment(s) | |
161 | * @inode - pointer to inode | |
162 | * @fragment - number of `fragment' which hold pointer | |
163 | * to new allocated fragment(s) | |
164 | * @new_fragment - number of new allocated fragment(s) | |
165 | * @required - how many fragment(s) we require | |
166 | * @err - we set it if something wrong | |
167 | * @phys - pointer to where we save physical number of new allocated fragments, | |
168 | * NULL if we allocate not data(indirect blocks for example). | |
169 | * @new - we set it if we allocate new block | |
170 | * @locked_page - for ufs_new_fragments() | |
171 | */ | |
172 | static struct buffer_head * | |
173 | ufs_inode_getfrag(struct inode *inode, unsigned int fragment, | |
174 | sector_t new_fragment, unsigned int required, int *err, | |
175 | long *phys, int *new, struct page *locked_page) | |
1da177e4 LT |
176 | { |
177 | struct ufs_inode_info *ufsi = UFS_I(inode); | |
022a6dc5 ED |
178 | struct super_block *sb = inode->i_sb; |
179 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; | |
1da177e4 LT |
180 | struct buffer_head * result; |
181 | unsigned block, blockoff, lastfrag, lastblock, lastblockoff; | |
182 | unsigned tmp, goal; | |
183 | __fs32 * p, * p2; | |
1da177e4 | 184 | |
022a6dc5 ED |
185 | UFSD("ENTER, ino %lu, fragment %u, new_fragment %llu, required %u, " |
186 | "metadata %d\n", inode->i_ino, fragment, | |
187 | (unsigned long long)new_fragment, required, !phys); | |
1da177e4 | 188 | |
1da177e4 LT |
189 | /* TODO : to be done for write support |
190 | if ( (flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) | |
191 | goto ufs2; | |
192 | */ | |
193 | ||
194 | block = ufs_fragstoblks (fragment); | |
195 | blockoff = ufs_fragnum (fragment); | |
196 | p = ufsi->i_u1.i_data + block; | |
197 | goal = 0; | |
198 | ||
199 | repeat: | |
200 | tmp = fs32_to_cpu(sb, *p); | |
201 | lastfrag = ufsi->i_lastfrag; | |
202 | if (tmp && fragment < lastfrag) { | |
022a6dc5 | 203 | if (!phys) { |
1da177e4 LT |
204 | result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff); |
205 | if (tmp == fs32_to_cpu(sb, *p)) { | |
abf5d15f | 206 | UFSD("EXIT, result %u\n", tmp + blockoff); |
1da177e4 LT |
207 | return result; |
208 | } | |
209 | brelse (result); | |
210 | goto repeat; | |
211 | } else { | |
c9a27b5d | 212 | *phys = tmp + blockoff; |
1da177e4 LT |
213 | return NULL; |
214 | } | |
215 | } | |
216 | ||
217 | lastblock = ufs_fragstoblks (lastfrag); | |
218 | lastblockoff = ufs_fragnum (lastfrag); | |
219 | /* | |
220 | * We will extend file into new block beyond last allocated block | |
221 | */ | |
222 | if (lastblock < block) { | |
223 | /* | |
224 | * We must reallocate last allocated block | |
225 | */ | |
226 | if (lastblockoff) { | |
227 | p2 = ufsi->i_u1.i_data + lastblock; | |
228 | tmp = ufs_new_fragments (inode, p2, lastfrag, | |
6ef4d6bf ED |
229 | fs32_to_cpu(sb, *p2), uspi->s_fpb - lastblockoff, |
230 | err, locked_page); | |
1da177e4 LT |
231 | if (!tmp) { |
232 | if (lastfrag != ufsi->i_lastfrag) | |
233 | goto repeat; | |
234 | else | |
235 | return NULL; | |
236 | } | |
237 | lastfrag = ufsi->i_lastfrag; | |
238 | ||
239 | } | |
c37336b0 ED |
240 | tmp = fs32_to_cpu(sb, ufsi->i_u1.i_data[lastblock]); |
241 | if (tmp) | |
242 | goal = tmp + uspi->s_fpb; | |
1da177e4 | 243 | tmp = ufs_new_fragments (inode, p, fragment - blockoff, |
6ef4d6bf | 244 | goal, required + blockoff, |
a685e26f ED |
245 | err, |
246 | phys != NULL ? locked_page : NULL); | |
1da177e4 LT |
247 | } |
248 | /* | |
249 | * We will extend last allocated block | |
250 | */ | |
251 | else if (lastblock == block) { | |
6ef4d6bf ED |
252 | tmp = ufs_new_fragments(inode, p, fragment - (blockoff - lastblockoff), |
253 | fs32_to_cpu(sb, *p), required + (blockoff - lastblockoff), | |
a685e26f | 254 | err, phys != NULL ? locked_page : NULL); |
c37336b0 | 255 | } else /* (lastblock > block) */ { |
1da177e4 LT |
256 | /* |
257 | * We will allocate new block before last allocated block | |
258 | */ | |
c37336b0 ED |
259 | if (block) { |
260 | tmp = fs32_to_cpu(sb, ufsi->i_u1.i_data[block-1]); | |
261 | if (tmp) | |
262 | goal = tmp + uspi->s_fpb; | |
263 | } | |
6ef4d6bf | 264 | tmp = ufs_new_fragments(inode, p, fragment - blockoff, |
a685e26f ED |
265 | goal, uspi->s_fpb, err, |
266 | phys != NULL ? locked_page : NULL); | |
1da177e4 LT |
267 | } |
268 | if (!tmp) { | |
269 | if ((!blockoff && *p) || | |
270 | (blockoff && lastfrag != ufsi->i_lastfrag)) | |
271 | goto repeat; | |
272 | *err = -ENOSPC; | |
273 | return NULL; | |
274 | } | |
275 | ||
022a6dc5 | 276 | if (!phys) { |
d63b7090 | 277 | result = sb_getblk(sb, tmp + blockoff); |
1da177e4 | 278 | } else { |
c9a27b5d | 279 | *phys = tmp + blockoff; |
1da177e4 LT |
280 | result = NULL; |
281 | *err = 0; | |
282 | *new = 1; | |
283 | } | |
284 | ||
285 | inode->i_ctime = CURRENT_TIME_SEC; | |
286 | if (IS_SYNC(inode)) | |
287 | ufs_sync_inode (inode); | |
288 | mark_inode_dirty(inode); | |
abf5d15f | 289 | UFSD("EXIT, result %u\n", tmp + blockoff); |
1da177e4 LT |
290 | return result; |
291 | ||
292 | /* This part : To be implemented .... | |
293 | Required only for writing, not required for READ-ONLY. | |
294 | ufs2: | |
295 | ||
296 | u2_block = ufs_fragstoblks(fragment); | |
297 | u2_blockoff = ufs_fragnum(fragment); | |
298 | p = ufsi->i_u1.u2_i_data + block; | |
299 | goal = 0; | |
300 | ||
301 | repeat2: | |
302 | tmp = fs32_to_cpu(sb, *p); | |
303 | lastfrag = ufsi->i_lastfrag; | |
304 | ||
305 | */ | |
306 | } | |
307 | ||
022a6dc5 ED |
308 | /** |
309 | * ufs_inode_getblock() - allocate new block | |
310 | * @inode - pointer to inode | |
311 | * @bh - pointer to block which hold "pointer" to new allocated block | |
312 | * @fragment - number of `fragment' which hold pointer | |
313 | * to new allocated block | |
314 | * @new_fragment - number of new allocated fragment | |
315 | * (block will hold this fragment and also uspi->s_fpb-1) | |
316 | * @err - see ufs_inode_getfrag() | |
317 | * @phys - see ufs_inode_getfrag() | |
318 | * @new - see ufs_inode_getfrag() | |
319 | * @locked_page - see ufs_inode_getfrag() | |
320 | */ | |
321 | static struct buffer_head * | |
322 | ufs_inode_getblock(struct inode *inode, struct buffer_head *bh, | |
323 | unsigned int fragment, sector_t new_fragment, int *err, | |
324 | long *phys, int *new, struct page *locked_page) | |
1da177e4 | 325 | { |
022a6dc5 ED |
326 | struct super_block *sb = inode->i_sb; |
327 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; | |
1da177e4 LT |
328 | struct buffer_head * result; |
329 | unsigned tmp, goal, block, blockoff; | |
330 | __fs32 * p; | |
331 | ||
1da177e4 LT |
332 | block = ufs_fragstoblks (fragment); |
333 | blockoff = ufs_fragnum (fragment); | |
334 | ||
022a6dc5 ED |
335 | UFSD("ENTER, ino %lu, fragment %u, new_fragment %llu, metadata %d\n", |
336 | inode->i_ino, fragment, (unsigned long long)new_fragment, !phys); | |
1da177e4 LT |
337 | |
338 | result = NULL; | |
339 | if (!bh) | |
340 | goto out; | |
341 | if (!buffer_uptodate(bh)) { | |
342 | ll_rw_block (READ, 1, &bh); | |
343 | wait_on_buffer (bh); | |
344 | if (!buffer_uptodate(bh)) | |
345 | goto out; | |
346 | } | |
347 | ||
348 | p = (__fs32 *) bh->b_data + block; | |
349 | repeat: | |
350 | tmp = fs32_to_cpu(sb, *p); | |
351 | if (tmp) { | |
022a6dc5 | 352 | if (!phys) { |
1da177e4 LT |
353 | result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff); |
354 | if (tmp == fs32_to_cpu(sb, *p)) | |
355 | goto out; | |
356 | brelse (result); | |
357 | goto repeat; | |
358 | } else { | |
c9a27b5d | 359 | *phys = tmp + blockoff; |
1da177e4 LT |
360 | goto out; |
361 | } | |
362 | } | |
363 | ||
c37336b0 | 364 | if (block && (tmp = fs32_to_cpu(sb, ((__fs32*)bh->b_data)[block-1]))) |
1da177e4 LT |
365 | goal = tmp + uspi->s_fpb; |
366 | else | |
367 | goal = bh->b_blocknr + uspi->s_fpb; | |
6ef4d6bf ED |
368 | tmp = ufs_new_fragments(inode, p, ufs_blknum(new_fragment), goal, |
369 | uspi->s_fpb, err, locked_page); | |
1da177e4 LT |
370 | if (!tmp) { |
371 | if (fs32_to_cpu(sb, *p)) | |
372 | goto repeat; | |
373 | goto out; | |
374 | } | |
375 | ||
c9a27b5d | 376 | |
022a6dc5 | 377 | if (!phys) { |
d63b7090 | 378 | result = sb_getblk(sb, tmp + blockoff); |
1da177e4 | 379 | } else { |
c9a27b5d | 380 | *phys = tmp + blockoff; |
1da177e4 LT |
381 | *new = 1; |
382 | } | |
383 | ||
384 | mark_buffer_dirty(bh); | |
385 | if (IS_SYNC(inode)) | |
386 | sync_dirty_buffer(bh); | |
387 | inode->i_ctime = CURRENT_TIME_SEC; | |
388 | mark_inode_dirty(inode); | |
abf5d15f | 389 | UFSD("result %u\n", tmp + blockoff); |
1da177e4 LT |
390 | out: |
391 | brelse (bh); | |
abf5d15f | 392 | UFSD("EXIT\n"); |
1da177e4 LT |
393 | return result; |
394 | } | |
395 | ||
022a6dc5 ED |
396 | /** |
397 | * ufs_getfrag_bloc() - `get_block_t' function, interface between UFS and | |
398 | * readpage, writepage and so on | |
1da177e4 LT |
399 | */ |
400 | ||
022a6dc5 | 401 | int ufs_getfrag_block(struct inode *inode, sector_t fragment, struct buffer_head *bh_result, int create) |
1da177e4 LT |
402 | { |
403 | struct super_block * sb = inode->i_sb; | |
404 | struct ufs_sb_private_info * uspi = UFS_SB(sb)->s_uspi; | |
405 | struct buffer_head * bh; | |
406 | int ret, err, new; | |
407 | unsigned long ptr,phys; | |
408 | u64 phys64 = 0; | |
409 | ||
410 | if (!create) { | |
411 | phys64 = ufs_frag_map(inode, fragment); | |
7256d819 | 412 | UFSD("phys64 = %llu\n", (unsigned long long)phys64); |
1da177e4 LT |
413 | if (phys64) |
414 | map_bh(bh_result, sb, phys64); | |
415 | return 0; | |
416 | } | |
417 | ||
418 | /* This code entered only while writing ....? */ | |
419 | ||
420 | err = -EIO; | |
421 | new = 0; | |
422 | ret = 0; | |
423 | bh = NULL; | |
424 | ||
425 | lock_kernel(); | |
426 | ||
abf5d15f | 427 | UFSD("ENTER, ino %lu, fragment %llu\n", inode->i_ino, (unsigned long long)fragment); |
1da177e4 LT |
428 | if (fragment < 0) |
429 | goto abort_negative; | |
430 | if (fragment > | |
431 | ((UFS_NDADDR + uspi->s_apb + uspi->s_2apb + uspi->s_3apb) | |
432 | << uspi->s_fpbshift)) | |
433 | goto abort_too_big; | |
434 | ||
435 | err = 0; | |
436 | ptr = fragment; | |
437 | ||
438 | /* | |
439 | * ok, these macros clean the logic up a bit and make | |
440 | * it much more readable: | |
441 | */ | |
442 | #define GET_INODE_DATABLOCK(x) \ | |
a685e26f ED |
443 | ufs_inode_getfrag(inode, x, fragment, 1, &err, &phys, &new,\ |
444 | bh_result->b_page) | |
1da177e4 | 445 | #define GET_INODE_PTR(x) \ |
a685e26f ED |
446 | ufs_inode_getfrag(inode, x, fragment, uspi->s_fpb, &err, NULL, NULL,\ |
447 | bh_result->b_page) | |
1da177e4 | 448 | #define GET_INDIRECT_DATABLOCK(x) \ |
022a6dc5 | 449 | ufs_inode_getblock(inode, bh, x, fragment, \ |
d63b7090 | 450 | &err, &phys, &new, bh_result->b_page) |
1da177e4 | 451 | #define GET_INDIRECT_PTR(x) \ |
022a6dc5 | 452 | ufs_inode_getblock(inode, bh, x, fragment, \ |
d63b7090 | 453 | &err, NULL, NULL, NULL) |
1da177e4 LT |
454 | |
455 | if (ptr < UFS_NDIR_FRAGMENT) { | |
456 | bh = GET_INODE_DATABLOCK(ptr); | |
457 | goto out; | |
458 | } | |
459 | ptr -= UFS_NDIR_FRAGMENT; | |
460 | if (ptr < (1 << (uspi->s_apbshift + uspi->s_fpbshift))) { | |
461 | bh = GET_INODE_PTR(UFS_IND_FRAGMENT + (ptr >> uspi->s_apbshift)); | |
462 | goto get_indirect; | |
463 | } | |
464 | ptr -= 1 << (uspi->s_apbshift + uspi->s_fpbshift); | |
465 | if (ptr < (1 << (uspi->s_2apbshift + uspi->s_fpbshift))) { | |
466 | bh = GET_INODE_PTR(UFS_DIND_FRAGMENT + (ptr >> uspi->s_2apbshift)); | |
467 | goto get_double; | |
468 | } | |
469 | ptr -= 1 << (uspi->s_2apbshift + uspi->s_fpbshift); | |
470 | bh = GET_INODE_PTR(UFS_TIND_FRAGMENT + (ptr >> uspi->s_3apbshift)); | |
471 | bh = GET_INDIRECT_PTR((ptr >> uspi->s_2apbshift) & uspi->s_apbmask); | |
472 | get_double: | |
473 | bh = GET_INDIRECT_PTR((ptr >> uspi->s_apbshift) & uspi->s_apbmask); | |
474 | get_indirect: | |
475 | bh = GET_INDIRECT_DATABLOCK(ptr & uspi->s_apbmask); | |
476 | ||
477 | #undef GET_INODE_DATABLOCK | |
478 | #undef GET_INODE_PTR | |
479 | #undef GET_INDIRECT_DATABLOCK | |
480 | #undef GET_INDIRECT_PTR | |
481 | ||
482 | out: | |
483 | if (err) | |
484 | goto abort; | |
485 | if (new) | |
486 | set_buffer_new(bh_result); | |
487 | map_bh(bh_result, sb, phys); | |
488 | abort: | |
489 | unlock_kernel(); | |
490 | return err; | |
491 | ||
492 | abort_negative: | |
493 | ufs_warning(sb, "ufs_get_block", "block < 0"); | |
494 | goto abort; | |
495 | ||
496 | abort_too_big: | |
497 | ufs_warning(sb, "ufs_get_block", "block > big"); | |
498 | goto abort; | |
499 | } | |
500 | ||
138bb68a AB |
501 | static struct buffer_head *ufs_getfrag(struct inode *inode, |
502 | unsigned int fragment, | |
503 | int create, int *err) | |
1da177e4 LT |
504 | { |
505 | struct buffer_head dummy; | |
506 | int error; | |
507 | ||
508 | dummy.b_state = 0; | |
509 | dummy.b_blocknr = -1000; | |
510 | error = ufs_getfrag_block(inode, fragment, &dummy, create); | |
511 | *err = error; | |
512 | if (!error && buffer_mapped(&dummy)) { | |
513 | struct buffer_head *bh; | |
514 | bh = sb_getblk(inode->i_sb, dummy.b_blocknr); | |
515 | if (buffer_new(&dummy)) { | |
516 | memset(bh->b_data, 0, inode->i_sb->s_blocksize); | |
517 | set_buffer_uptodate(bh); | |
518 | mark_buffer_dirty(bh); | |
519 | } | |
520 | return bh; | |
521 | } | |
522 | return NULL; | |
523 | } | |
524 | ||
525 | struct buffer_head * ufs_bread (struct inode * inode, unsigned fragment, | |
526 | int create, int * err) | |
527 | { | |
528 | struct buffer_head * bh; | |
529 | ||
abf5d15f | 530 | UFSD("ENTER, ino %lu, fragment %u\n", inode->i_ino, fragment); |
1da177e4 LT |
531 | bh = ufs_getfrag (inode, fragment, create, err); |
532 | if (!bh || buffer_uptodate(bh)) | |
533 | return bh; | |
534 | ll_rw_block (READ, 1, &bh); | |
535 | wait_on_buffer (bh); | |
536 | if (buffer_uptodate(bh)) | |
537 | return bh; | |
538 | brelse (bh); | |
539 | *err = -EIO; | |
540 | return NULL; | |
541 | } | |
542 | ||
543 | static int ufs_writepage(struct page *page, struct writeback_control *wbc) | |
544 | { | |
545 | return block_write_full_page(page,ufs_getfrag_block,wbc); | |
546 | } | |
547 | static int ufs_readpage(struct file *file, struct page *page) | |
548 | { | |
549 | return block_read_full_page(page,ufs_getfrag_block); | |
550 | } | |
551 | static int ufs_prepare_write(struct file *file, struct page *page, unsigned from, unsigned to) | |
552 | { | |
553 | return block_prepare_write(page,from,to,ufs_getfrag_block); | |
554 | } | |
555 | static sector_t ufs_bmap(struct address_space *mapping, sector_t block) | |
556 | { | |
557 | return generic_block_bmap(mapping,block,ufs_getfrag_block); | |
558 | } | |
f5e54d6e | 559 | const struct address_space_operations ufs_aops = { |
1da177e4 LT |
560 | .readpage = ufs_readpage, |
561 | .writepage = ufs_writepage, | |
562 | .sync_page = block_sync_page, | |
563 | .prepare_write = ufs_prepare_write, | |
564 | .commit_write = generic_commit_write, | |
565 | .bmap = ufs_bmap | |
566 | }; | |
567 | ||
826843a3 ED |
568 | static void ufs_set_inode_ops(struct inode *inode) |
569 | { | |
570 | if (S_ISREG(inode->i_mode)) { | |
571 | inode->i_op = &ufs_file_inode_operations; | |
572 | inode->i_fop = &ufs_file_operations; | |
573 | inode->i_mapping->a_ops = &ufs_aops; | |
574 | } else if (S_ISDIR(inode->i_mode)) { | |
575 | inode->i_op = &ufs_dir_inode_operations; | |
576 | inode->i_fop = &ufs_dir_operations; | |
577 | inode->i_mapping->a_ops = &ufs_aops; | |
578 | } else if (S_ISLNK(inode->i_mode)) { | |
579 | if (!inode->i_blocks) | |
580 | inode->i_op = &ufs_fast_symlink_inode_operations; | |
581 | else { | |
582 | inode->i_op = &page_symlink_inode_operations; | |
583 | inode->i_mapping->a_ops = &ufs_aops; | |
584 | } | |
585 | } else | |
586 | init_special_inode(inode, inode->i_mode, | |
587 | ufs_get_inode_dev(inode->i_sb, UFS_I(inode))); | |
588 | } | |
589 | ||
05f225dc | 590 | static void ufs1_read_inode(struct inode *inode, struct ufs_inode *ufs_inode) |
1da177e4 LT |
591 | { |
592 | struct ufs_inode_info *ufsi = UFS_I(inode); | |
05f225dc | 593 | struct super_block *sb = inode->i_sb; |
1da177e4 LT |
594 | mode_t mode; |
595 | unsigned i; | |
1da177e4 LT |
596 | |
597 | /* | |
598 | * Copy data to the in-core inode. | |
599 | */ | |
600 | inode->i_mode = mode = fs16_to_cpu(sb, ufs_inode->ui_mode); | |
601 | inode->i_nlink = fs16_to_cpu(sb, ufs_inode->ui_nlink); | |
602 | if (inode->i_nlink == 0) | |
603 | ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino); | |
604 | ||
605 | /* | |
606 | * Linux now has 32-bit uid and gid, so we can support EFT. | |
607 | */ | |
608 | inode->i_uid = ufs_get_inode_uid(sb, ufs_inode); | |
609 | inode->i_gid = ufs_get_inode_gid(sb, ufs_inode); | |
610 | ||
611 | inode->i_size = fs64_to_cpu(sb, ufs_inode->ui_size); | |
612 | inode->i_atime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_atime.tv_sec); | |
613 | inode->i_ctime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_ctime.tv_sec); | |
614 | inode->i_mtime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_mtime.tv_sec); | |
615 | inode->i_mtime.tv_nsec = 0; | |
616 | inode->i_atime.tv_nsec = 0; | |
617 | inode->i_ctime.tv_nsec = 0; | |
618 | inode->i_blocks = fs32_to_cpu(sb, ufs_inode->ui_blocks); | |
3313e292 | 619 | inode->i_generation = fs32_to_cpu(sb, ufs_inode->ui_gen); |
1da177e4 | 620 | ufsi->i_flags = fs32_to_cpu(sb, ufs_inode->ui_flags); |
1da177e4 LT |
621 | ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow); |
622 | ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag); | |
05f225dc | 623 | |
1da177e4 LT |
624 | |
625 | if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) { | |
626 | for (i = 0; i < (UFS_NDADDR + UFS_NINDIR); i++) | |
627 | ufsi->i_u1.i_data[i] = ufs_inode->ui_u2.ui_addr.ui_db[i]; | |
dd187a26 | 628 | } else { |
1da177e4 LT |
629 | for (i = 0; i < (UFS_NDADDR + UFS_NINDIR) * 4; i++) |
630 | ufsi->i_u1.i_symlink[i] = ufs_inode->ui_u2.ui_symlink[i]; | |
631 | } | |
05f225dc | 632 | } |
1da177e4 | 633 | |
05f225dc ED |
634 | static void ufs2_read_inode(struct inode *inode, struct ufs2_inode *ufs2_inode) |
635 | { | |
636 | struct ufs_inode_info *ufsi = UFS_I(inode); | |
637 | struct super_block *sb = inode->i_sb; | |
638 | mode_t mode; | |
639 | unsigned i; | |
1da177e4 | 640 | |
abf5d15f | 641 | UFSD("Reading ufs2 inode, ino %lu\n", inode->i_ino); |
1da177e4 LT |
642 | /* |
643 | * Copy data to the in-core inode. | |
644 | */ | |
645 | inode->i_mode = mode = fs16_to_cpu(sb, ufs2_inode->ui_mode); | |
646 | inode->i_nlink = fs16_to_cpu(sb, ufs2_inode->ui_nlink); | |
647 | if (inode->i_nlink == 0) | |
648 | ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino); | |
649 | ||
650 | /* | |
651 | * Linux now has 32-bit uid and gid, so we can support EFT. | |
652 | */ | |
653 | inode->i_uid = fs32_to_cpu(sb, ufs2_inode->ui_uid); | |
654 | inode->i_gid = fs32_to_cpu(sb, ufs2_inode->ui_gid); | |
655 | ||
656 | inode->i_size = fs64_to_cpu(sb, ufs2_inode->ui_size); | |
657 | inode->i_atime.tv_sec = fs32_to_cpu(sb, ufs2_inode->ui_atime.tv_sec); | |
658 | inode->i_ctime.tv_sec = fs32_to_cpu(sb, ufs2_inode->ui_ctime.tv_sec); | |
659 | inode->i_mtime.tv_sec = fs32_to_cpu(sb, ufs2_inode->ui_mtime.tv_sec); | |
660 | inode->i_mtime.tv_nsec = 0; | |
661 | inode->i_atime.tv_nsec = 0; | |
662 | inode->i_ctime.tv_nsec = 0; | |
663 | inode->i_blocks = fs64_to_cpu(sb, ufs2_inode->ui_blocks); | |
3313e292 | 664 | inode->i_generation = fs32_to_cpu(sb, ufs2_inode->ui_gen); |
1da177e4 | 665 | ufsi->i_flags = fs32_to_cpu(sb, ufs2_inode->ui_flags); |
1da177e4 LT |
666 | /* |
667 | ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow); | |
668 | ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag); | |
669 | */ | |
1da177e4 LT |
670 | |
671 | if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) { | |
672 | for (i = 0; i < (UFS_NDADDR + UFS_NINDIR); i++) | |
673 | ufsi->i_u1.u2_i_data[i] = | |
674 | ufs2_inode->ui_u2.ui_addr.ui_db[i]; | |
05f225dc | 675 | } else { |
1da177e4 LT |
676 | for (i = 0; i < (UFS_NDADDR + UFS_NINDIR) * 4; i++) |
677 | ufsi->i_u1.i_symlink[i] = ufs2_inode->ui_u2.ui_symlink[i]; | |
678 | } | |
05f225dc ED |
679 | } |
680 | ||
681 | void ufs_read_inode(struct inode * inode) | |
682 | { | |
683 | struct ufs_inode_info *ufsi = UFS_I(inode); | |
684 | struct super_block * sb; | |
685 | struct ufs_sb_private_info * uspi; | |
686 | struct buffer_head * bh; | |
687 | ||
688 | UFSD("ENTER, ino %lu\n", inode->i_ino); | |
689 | ||
690 | sb = inode->i_sb; | |
691 | uspi = UFS_SB(sb)->s_uspi; | |
692 | ||
693 | if (inode->i_ino < UFS_ROOTINO || | |
694 | inode->i_ino > (uspi->s_ncg * uspi->s_ipg)) { | |
695 | ufs_warning(sb, "ufs_read_inode", "bad inode number (%lu)\n", | |
696 | inode->i_ino); | |
697 | goto bad_inode; | |
698 | } | |
699 | ||
700 | bh = sb_bread(sb, uspi->s_sbbase + ufs_inotofsba(inode->i_ino)); | |
701 | if (!bh) { | |
702 | ufs_warning(sb, "ufs_read_inode", "unable to read inode %lu\n", | |
703 | inode->i_ino); | |
704 | goto bad_inode; | |
705 | } | |
706 | if ((UFS_SB(sb)->s_flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { | |
707 | struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data; | |
708 | ||
709 | ufs2_read_inode(inode, | |
710 | ufs2_inode + ufs_inotofsbo(inode->i_ino)); | |
711 | } else { | |
712 | struct ufs_inode *ufs_inode = (struct ufs_inode *)bh->b_data; | |
713 | ||
714 | ufs1_read_inode(inode, ufs_inode + ufs_inotofsbo(inode->i_ino)); | |
715 | } | |
716 | ||
05f225dc ED |
717 | inode->i_version++; |
718 | ufsi->i_lastfrag = | |
719 | (inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift; | |
720 | ufsi->i_dir_start_lookup = 0; | |
1da177e4 LT |
721 | ufsi->i_osync = 0; |
722 | ||
826843a3 | 723 | ufs_set_inode_ops(inode); |
1da177e4 LT |
724 | |
725 | brelse(bh); | |
726 | ||
abf5d15f | 727 | UFSD("EXIT\n"); |
1da177e4 | 728 | return; |
05f225dc ED |
729 | |
730 | bad_inode: | |
731 | make_bad_inode(inode); | |
1da177e4 LT |
732 | } |
733 | ||
3313e292 | 734 | static void ufs1_update_inode(struct inode *inode, struct ufs_inode *ufs_inode) |
1da177e4 | 735 | { |
3313e292 ED |
736 | struct super_block *sb = inode->i_sb; |
737 | struct ufs_inode_info *ufsi = UFS_I(inode); | |
738 | unsigned i; | |
1da177e4 LT |
739 | |
740 | ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode); | |
741 | ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink); | |
742 | ||
743 | ufs_set_inode_uid(sb, ufs_inode, inode->i_uid); | |
744 | ufs_set_inode_gid(sb, ufs_inode, inode->i_gid); | |
745 | ||
746 | ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size); | |
747 | ufs_inode->ui_atime.tv_sec = cpu_to_fs32(sb, inode->i_atime.tv_sec); | |
748 | ufs_inode->ui_atime.tv_usec = 0; | |
749 | ufs_inode->ui_ctime.tv_sec = cpu_to_fs32(sb, inode->i_ctime.tv_sec); | |
750 | ufs_inode->ui_ctime.tv_usec = 0; | |
751 | ufs_inode->ui_mtime.tv_sec = cpu_to_fs32(sb, inode->i_mtime.tv_sec); | |
752 | ufs_inode->ui_mtime.tv_usec = 0; | |
753 | ufs_inode->ui_blocks = cpu_to_fs32(sb, inode->i_blocks); | |
754 | ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags); | |
3313e292 | 755 | ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation); |
1da177e4 | 756 | |
3313e292 | 757 | if ((UFS_SB(sb)->s_flags & UFS_UID_MASK) == UFS_UID_EFT) { |
1da177e4 LT |
758 | ufs_inode->ui_u3.ui_sun.ui_shadow = cpu_to_fs32(sb, ufsi->i_shadow); |
759 | ufs_inode->ui_u3.ui_sun.ui_oeftflag = cpu_to_fs32(sb, ufsi->i_oeftflag); | |
760 | } | |
761 | ||
762 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { | |
763 | /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */ | |
764 | ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.i_data[0]; | |
765 | } else if (inode->i_blocks) { | |
766 | for (i = 0; i < (UFS_NDADDR + UFS_NINDIR); i++) | |
767 | ufs_inode->ui_u2.ui_addr.ui_db[i] = ufsi->i_u1.i_data[i]; | |
768 | } | |
769 | else { | |
770 | for (i = 0; i < (UFS_NDADDR + UFS_NINDIR) * 4; i++) | |
771 | ufs_inode->ui_u2.ui_symlink[i] = ufsi->i_u1.i_symlink[i]; | |
772 | } | |
773 | ||
774 | if (!inode->i_nlink) | |
775 | memset (ufs_inode, 0, sizeof(struct ufs_inode)); | |
3313e292 ED |
776 | } |
777 | ||
778 | static void ufs2_update_inode(struct inode *inode, struct ufs2_inode *ufs_inode) | |
779 | { | |
780 | struct super_block *sb = inode->i_sb; | |
781 | struct ufs_inode_info *ufsi = UFS_I(inode); | |
782 | unsigned i; | |
783 | ||
784 | UFSD("ENTER\n"); | |
785 | ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode); | |
786 | ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink); | |
787 | ||
788 | ufs_inode->ui_uid = cpu_to_fs32(sb, inode->i_uid); | |
789 | ufs_inode->ui_gid = cpu_to_fs32(sb, inode->i_gid); | |
790 | ||
791 | ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size); | |
792 | ufs_inode->ui_atime.tv_sec = cpu_to_fs32(sb, inode->i_atime.tv_sec); | |
793 | ufs_inode->ui_atime.tv_usec = 0; | |
794 | ufs_inode->ui_ctime.tv_sec = cpu_to_fs32(sb, inode->i_ctime.tv_sec); | |
795 | ufs_inode->ui_ctime.tv_usec = 0; | |
796 | ufs_inode->ui_mtime.tv_sec = cpu_to_fs32(sb, inode->i_mtime.tv_sec); | |
797 | ufs_inode->ui_mtime.tv_usec = 0; | |
798 | ||
799 | ufs_inode->ui_blocks = cpu_to_fs64(sb, inode->i_blocks); | |
800 | ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags); | |
801 | ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation); | |
802 | ||
803 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { | |
804 | /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */ | |
805 | ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.u2_i_data[0]; | |
806 | } else if (inode->i_blocks) { | |
807 | for (i = 0; i < (UFS_NDADDR + UFS_NINDIR); i++) | |
808 | ufs_inode->ui_u2.ui_addr.ui_db[i] = ufsi->i_u1.u2_i_data[i]; | |
809 | } else { | |
810 | for (i = 0; i < (UFS_NDADDR + UFS_NINDIR) * 4; i++) | |
811 | ufs_inode->ui_u2.ui_symlink[i] = ufsi->i_u1.i_symlink[i]; | |
812 | } | |
813 | ||
814 | if (!inode->i_nlink) | |
815 | memset (ufs_inode, 0, sizeof(struct ufs2_inode)); | |
816 | UFSD("EXIT\n"); | |
817 | } | |
818 | ||
819 | static int ufs_update_inode(struct inode * inode, int do_sync) | |
820 | { | |
821 | struct super_block *sb = inode->i_sb; | |
822 | struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; | |
823 | struct buffer_head * bh; | |
824 | ||
825 | UFSD("ENTER, ino %lu\n", inode->i_ino); | |
826 | ||
827 | if (inode->i_ino < UFS_ROOTINO || | |
828 | inode->i_ino > (uspi->s_ncg * uspi->s_ipg)) { | |
829 | ufs_warning (sb, "ufs_read_inode", "bad inode number (%lu)\n", inode->i_ino); | |
830 | return -1; | |
831 | } | |
832 | ||
833 | bh = sb_bread(sb, ufs_inotofsba(inode->i_ino)); | |
834 | if (!bh) { | |
835 | ufs_warning (sb, "ufs_read_inode", "unable to read inode %lu\n", inode->i_ino); | |
836 | return -1; | |
837 | } | |
838 | if (uspi->fs_magic == UFS2_MAGIC) { | |
839 | struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data; | |
840 | ||
841 | ufs2_update_inode(inode, | |
842 | ufs2_inode + ufs_inotofsbo(inode->i_ino)); | |
843 | } else { | |
844 | struct ufs_inode *ufs_inode = (struct ufs_inode *) bh->b_data; | |
845 | ||
846 | ufs1_update_inode(inode, ufs_inode + ufs_inotofsbo(inode->i_ino)); | |
847 | } | |
1da177e4 LT |
848 | |
849 | mark_buffer_dirty(bh); | |
850 | if (do_sync) | |
851 | sync_dirty_buffer(bh); | |
852 | brelse (bh); | |
853 | ||
abf5d15f | 854 | UFSD("EXIT\n"); |
1da177e4 LT |
855 | return 0; |
856 | } | |
857 | ||
858 | int ufs_write_inode (struct inode * inode, int wait) | |
859 | { | |
860 | int ret; | |
861 | lock_kernel(); | |
862 | ret = ufs_update_inode (inode, wait); | |
863 | unlock_kernel(); | |
864 | return ret; | |
865 | } | |
866 | ||
867 | int ufs_sync_inode (struct inode *inode) | |
868 | { | |
869 | return ufs_update_inode (inode, 1); | |
870 | } | |
871 | ||
872 | void ufs_delete_inode (struct inode * inode) | |
873 | { | |
10e5dce0 ED |
874 | loff_t old_i_size; |
875 | ||
fef26658 | 876 | truncate_inode_pages(&inode->i_data, 0); |
1da177e4 LT |
877 | /*UFS_I(inode)->i_dtime = CURRENT_TIME;*/ |
878 | lock_kernel(); | |
879 | mark_inode_dirty(inode); | |
880 | ufs_update_inode(inode, IS_SYNC(inode)); | |
10e5dce0 | 881 | old_i_size = inode->i_size; |
1da177e4 | 882 | inode->i_size = 0; |
10e5dce0 ED |
883 | if (inode->i_blocks && ufs_truncate(inode, old_i_size)) |
884 | ufs_warning(inode->i_sb, __FUNCTION__, "ufs_truncate failed\n"); | |
1da177e4 LT |
885 | ufs_free_inode (inode); |
886 | unlock_kernel(); | |
887 | } |