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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 | ||
c9a27b5d ED |
155 | static void ufs_clear_block(struct inode *inode, struct buffer_head *bh) |
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 | ||
6ef4d6bf ED |
166 | static struct buffer_head *ufs_inode_getfrag(struct inode *inode, |
167 | unsigned int fragment, unsigned int new_fragment, | |
168 | unsigned int required, int *err, int metadata, | |
169 | long *phys, int *new, struct page *locked_page) | |
1da177e4 LT |
170 | { |
171 | struct ufs_inode_info *ufsi = UFS_I(inode); | |
172 | struct super_block * sb; | |
173 | struct ufs_sb_private_info * uspi; | |
174 | struct buffer_head * result; | |
175 | unsigned block, blockoff, lastfrag, lastblock, lastblockoff; | |
176 | unsigned tmp, goal; | |
177 | __fs32 * p, * p2; | |
178 | unsigned flags = 0; | |
179 | ||
abf5d15f ED |
180 | UFSD("ENTER, ino %lu, fragment %u, new_fragment %u, required %u\n", |
181 | inode->i_ino, fragment, new_fragment, required); | |
1da177e4 LT |
182 | |
183 | sb = inode->i_sb; | |
184 | uspi = UFS_SB(sb)->s_uspi; | |
185 | ||
186 | flags = UFS_SB(sb)->s_flags; | |
187 | /* TODO : to be done for write support | |
188 | if ( (flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) | |
189 | goto ufs2; | |
190 | */ | |
191 | ||
192 | block = ufs_fragstoblks (fragment); | |
193 | blockoff = ufs_fragnum (fragment); | |
194 | p = ufsi->i_u1.i_data + block; | |
195 | goal = 0; | |
196 | ||
197 | repeat: | |
198 | tmp = fs32_to_cpu(sb, *p); | |
199 | lastfrag = ufsi->i_lastfrag; | |
200 | if (tmp && fragment < lastfrag) { | |
201 | if (metadata) { | |
202 | result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff); | |
203 | if (tmp == fs32_to_cpu(sb, *p)) { | |
abf5d15f | 204 | UFSD("EXIT, result %u\n", tmp + blockoff); |
1da177e4 LT |
205 | return result; |
206 | } | |
207 | brelse (result); | |
208 | goto repeat; | |
209 | } else { | |
c9a27b5d | 210 | *phys = tmp + blockoff; |
1da177e4 LT |
211 | return NULL; |
212 | } | |
213 | } | |
214 | ||
215 | lastblock = ufs_fragstoblks (lastfrag); | |
216 | lastblockoff = ufs_fragnum (lastfrag); | |
217 | /* | |
218 | * We will extend file into new block beyond last allocated block | |
219 | */ | |
220 | if (lastblock < block) { | |
221 | /* | |
222 | * We must reallocate last allocated block | |
223 | */ | |
224 | if (lastblockoff) { | |
225 | p2 = ufsi->i_u1.i_data + lastblock; | |
226 | tmp = ufs_new_fragments (inode, p2, lastfrag, | |
6ef4d6bf ED |
227 | fs32_to_cpu(sb, *p2), uspi->s_fpb - lastblockoff, |
228 | err, locked_page); | |
1da177e4 LT |
229 | if (!tmp) { |
230 | if (lastfrag != ufsi->i_lastfrag) | |
231 | goto repeat; | |
232 | else | |
233 | return NULL; | |
234 | } | |
235 | lastfrag = ufsi->i_lastfrag; | |
236 | ||
237 | } | |
238 | goal = fs32_to_cpu(sb, ufsi->i_u1.i_data[lastblock]) + uspi->s_fpb; | |
239 | tmp = ufs_new_fragments (inode, p, fragment - blockoff, | |
6ef4d6bf ED |
240 | goal, required + blockoff, |
241 | err, locked_page); | |
1da177e4 LT |
242 | } |
243 | /* | |
244 | * We will extend last allocated block | |
245 | */ | |
246 | else if (lastblock == block) { | |
6ef4d6bf ED |
247 | tmp = ufs_new_fragments(inode, p, fragment - (blockoff - lastblockoff), |
248 | fs32_to_cpu(sb, *p), required + (blockoff - lastblockoff), | |
249 | err, locked_page); | |
1da177e4 LT |
250 | } |
251 | /* | |
252 | * We will allocate new block before last allocated block | |
253 | */ | |
254 | else /* (lastblock > block) */ { | |
255 | if (lastblock && (tmp = fs32_to_cpu(sb, ufsi->i_u1.i_data[lastblock-1]))) | |
256 | goal = tmp + uspi->s_fpb; | |
6ef4d6bf ED |
257 | tmp = ufs_new_fragments(inode, p, fragment - blockoff, |
258 | goal, uspi->s_fpb, err, locked_page); | |
1da177e4 LT |
259 | } |
260 | if (!tmp) { | |
261 | if ((!blockoff && *p) || | |
262 | (blockoff && lastfrag != ufsi->i_lastfrag)) | |
263 | goto repeat; | |
264 | *err = -ENOSPC; | |
265 | return NULL; | |
266 | } | |
267 | ||
1da177e4 LT |
268 | if (metadata) { |
269 | result = sb_getblk(inode->i_sb, tmp + blockoff); | |
c9a27b5d | 270 | ufs_clear_block(inode, result); |
1da177e4 | 271 | } else { |
c9a27b5d | 272 | *phys = tmp + blockoff; |
1da177e4 LT |
273 | result = NULL; |
274 | *err = 0; | |
275 | *new = 1; | |
276 | } | |
277 | ||
278 | inode->i_ctime = CURRENT_TIME_SEC; | |
279 | if (IS_SYNC(inode)) | |
280 | ufs_sync_inode (inode); | |
281 | mark_inode_dirty(inode); | |
abf5d15f | 282 | UFSD("EXIT, result %u\n", tmp + blockoff); |
1da177e4 LT |
283 | return result; |
284 | ||
285 | /* This part : To be implemented .... | |
286 | Required only for writing, not required for READ-ONLY. | |
287 | ufs2: | |
288 | ||
289 | u2_block = ufs_fragstoblks(fragment); | |
290 | u2_blockoff = ufs_fragnum(fragment); | |
291 | p = ufsi->i_u1.u2_i_data + block; | |
292 | goal = 0; | |
293 | ||
294 | repeat2: | |
295 | tmp = fs32_to_cpu(sb, *p); | |
296 | lastfrag = ufsi->i_lastfrag; | |
297 | ||
298 | */ | |
299 | } | |
300 | ||
6ef4d6bf ED |
301 | static struct buffer_head *ufs_block_getfrag(struct inode *inode, struct buffer_head *bh, |
302 | unsigned int fragment, unsigned int new_fragment, | |
303 | unsigned int blocksize, int * err, int metadata, | |
304 | long *phys, int *new, struct page *locked_page) | |
1da177e4 LT |
305 | { |
306 | struct super_block * sb; | |
307 | struct ufs_sb_private_info * uspi; | |
308 | struct buffer_head * result; | |
309 | unsigned tmp, goal, block, blockoff; | |
310 | __fs32 * p; | |
311 | ||
312 | sb = inode->i_sb; | |
313 | uspi = UFS_SB(sb)->s_uspi; | |
314 | block = ufs_fragstoblks (fragment); | |
315 | blockoff = ufs_fragnum (fragment); | |
316 | ||
abf5d15f | 317 | UFSD("ENTER, ino %lu, fragment %u, new_fragment %u\n", inode->i_ino, fragment, new_fragment); |
1da177e4 LT |
318 | |
319 | result = NULL; | |
320 | if (!bh) | |
321 | goto out; | |
322 | if (!buffer_uptodate(bh)) { | |
323 | ll_rw_block (READ, 1, &bh); | |
324 | wait_on_buffer (bh); | |
325 | if (!buffer_uptodate(bh)) | |
326 | goto out; | |
327 | } | |
328 | ||
329 | p = (__fs32 *) bh->b_data + block; | |
330 | repeat: | |
331 | tmp = fs32_to_cpu(sb, *p); | |
332 | if (tmp) { | |
333 | if (metadata) { | |
334 | result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff); | |
335 | if (tmp == fs32_to_cpu(sb, *p)) | |
336 | goto out; | |
337 | brelse (result); | |
338 | goto repeat; | |
339 | } else { | |
c9a27b5d | 340 | *phys = tmp + blockoff; |
1da177e4 LT |
341 | goto out; |
342 | } | |
343 | } | |
344 | ||
345 | if (block && (tmp = fs32_to_cpu(sb, ((__fs32*)bh->b_data)[block-1]) + uspi->s_fpb)) | |
346 | goal = tmp + uspi->s_fpb; | |
347 | else | |
348 | goal = bh->b_blocknr + uspi->s_fpb; | |
6ef4d6bf ED |
349 | tmp = ufs_new_fragments(inode, p, ufs_blknum(new_fragment), goal, |
350 | uspi->s_fpb, err, locked_page); | |
1da177e4 LT |
351 | if (!tmp) { |
352 | if (fs32_to_cpu(sb, *p)) | |
353 | goto repeat; | |
354 | goto out; | |
355 | } | |
356 | ||
c9a27b5d | 357 | |
1da177e4 LT |
358 | if (metadata) { |
359 | result = sb_getblk(sb, tmp + blockoff); | |
c9a27b5d | 360 | ufs_clear_block(inode, result); |
1da177e4 | 361 | } else { |
c9a27b5d | 362 | *phys = tmp + blockoff; |
1da177e4 LT |
363 | *new = 1; |
364 | } | |
365 | ||
366 | mark_buffer_dirty(bh); | |
367 | if (IS_SYNC(inode)) | |
368 | sync_dirty_buffer(bh); | |
369 | inode->i_ctime = CURRENT_TIME_SEC; | |
370 | mark_inode_dirty(inode); | |
abf5d15f | 371 | UFSD("result %u\n", tmp + blockoff); |
1da177e4 LT |
372 | out: |
373 | brelse (bh); | |
abf5d15f | 374 | UFSD("EXIT\n"); |
1da177e4 LT |
375 | return result; |
376 | } | |
377 | ||
378 | /* | |
379 | * This function gets the block which contains the fragment. | |
380 | */ | |
381 | ||
09114eb8 | 382 | int ufs_getfrag_block (struct inode *inode, sector_t fragment, struct buffer_head *bh_result, int create) |
1da177e4 LT |
383 | { |
384 | struct super_block * sb = inode->i_sb; | |
385 | struct ufs_sb_private_info * uspi = UFS_SB(sb)->s_uspi; | |
386 | struct buffer_head * bh; | |
387 | int ret, err, new; | |
388 | unsigned long ptr,phys; | |
389 | u64 phys64 = 0; | |
390 | ||
391 | if (!create) { | |
392 | phys64 = ufs_frag_map(inode, fragment); | |
abf5d15f | 393 | UFSD("phys64 = %llu \n",phys64); |
1da177e4 LT |
394 | if (phys64) |
395 | map_bh(bh_result, sb, phys64); | |
396 | return 0; | |
397 | } | |
398 | ||
399 | /* This code entered only while writing ....? */ | |
400 | ||
401 | err = -EIO; | |
402 | new = 0; | |
403 | ret = 0; | |
404 | bh = NULL; | |
405 | ||
406 | lock_kernel(); | |
407 | ||
abf5d15f | 408 | UFSD("ENTER, ino %lu, fragment %llu\n", inode->i_ino, (unsigned long long)fragment); |
1da177e4 LT |
409 | if (fragment < 0) |
410 | goto abort_negative; | |
411 | if (fragment > | |
412 | ((UFS_NDADDR + uspi->s_apb + uspi->s_2apb + uspi->s_3apb) | |
413 | << uspi->s_fpbshift)) | |
414 | goto abort_too_big; | |
415 | ||
416 | err = 0; | |
417 | ptr = fragment; | |
418 | ||
419 | /* | |
420 | * ok, these macros clean the logic up a bit and make | |
421 | * it much more readable: | |
422 | */ | |
423 | #define GET_INODE_DATABLOCK(x) \ | |
6ef4d6bf | 424 | ufs_inode_getfrag(inode, x, fragment, 1, &err, 0, &phys, &new, bh_result->b_page) |
1da177e4 | 425 | #define GET_INODE_PTR(x) \ |
6ef4d6bf | 426 | ufs_inode_getfrag(inode, x, fragment, uspi->s_fpb, &err, 1, NULL, NULL, bh_result->b_page) |
1da177e4 | 427 | #define GET_INDIRECT_DATABLOCK(x) \ |
6ef4d6bf ED |
428 | ufs_block_getfrag(inode, bh, x, fragment, sb->s_blocksize, \ |
429 | &err, 0, &phys, &new, bh_result->b_page); | |
1da177e4 | 430 | #define GET_INDIRECT_PTR(x) \ |
6ef4d6bf ED |
431 | ufs_block_getfrag(inode, bh, x, fragment, sb->s_blocksize, \ |
432 | &err, 1, NULL, NULL, bh_result->b_page); | |
1da177e4 LT |
433 | |
434 | if (ptr < UFS_NDIR_FRAGMENT) { | |
435 | bh = GET_INODE_DATABLOCK(ptr); | |
436 | goto out; | |
437 | } | |
438 | ptr -= UFS_NDIR_FRAGMENT; | |
439 | if (ptr < (1 << (uspi->s_apbshift + uspi->s_fpbshift))) { | |
440 | bh = GET_INODE_PTR(UFS_IND_FRAGMENT + (ptr >> uspi->s_apbshift)); | |
441 | goto get_indirect; | |
442 | } | |
443 | ptr -= 1 << (uspi->s_apbshift + uspi->s_fpbshift); | |
444 | if (ptr < (1 << (uspi->s_2apbshift + uspi->s_fpbshift))) { | |
445 | bh = GET_INODE_PTR(UFS_DIND_FRAGMENT + (ptr >> uspi->s_2apbshift)); | |
446 | goto get_double; | |
447 | } | |
448 | ptr -= 1 << (uspi->s_2apbshift + uspi->s_fpbshift); | |
449 | bh = GET_INODE_PTR(UFS_TIND_FRAGMENT + (ptr >> uspi->s_3apbshift)); | |
450 | bh = GET_INDIRECT_PTR((ptr >> uspi->s_2apbshift) & uspi->s_apbmask); | |
451 | get_double: | |
452 | bh = GET_INDIRECT_PTR((ptr >> uspi->s_apbshift) & uspi->s_apbmask); | |
453 | get_indirect: | |
454 | bh = GET_INDIRECT_DATABLOCK(ptr & uspi->s_apbmask); | |
455 | ||
456 | #undef GET_INODE_DATABLOCK | |
457 | #undef GET_INODE_PTR | |
458 | #undef GET_INDIRECT_DATABLOCK | |
459 | #undef GET_INDIRECT_PTR | |
460 | ||
461 | out: | |
462 | if (err) | |
463 | goto abort; | |
464 | if (new) | |
465 | set_buffer_new(bh_result); | |
466 | map_bh(bh_result, sb, phys); | |
467 | abort: | |
468 | unlock_kernel(); | |
469 | return err; | |
470 | ||
471 | abort_negative: | |
472 | ufs_warning(sb, "ufs_get_block", "block < 0"); | |
473 | goto abort; | |
474 | ||
475 | abort_too_big: | |
476 | ufs_warning(sb, "ufs_get_block", "block > big"); | |
477 | goto abort; | |
478 | } | |
479 | ||
480 | struct buffer_head *ufs_getfrag(struct inode *inode, unsigned int fragment, | |
481 | int create, int *err) | |
482 | { | |
483 | struct buffer_head dummy; | |
484 | int error; | |
485 | ||
486 | dummy.b_state = 0; | |
487 | dummy.b_blocknr = -1000; | |
488 | error = ufs_getfrag_block(inode, fragment, &dummy, create); | |
489 | *err = error; | |
490 | if (!error && buffer_mapped(&dummy)) { | |
491 | struct buffer_head *bh; | |
492 | bh = sb_getblk(inode->i_sb, dummy.b_blocknr); | |
493 | if (buffer_new(&dummy)) { | |
494 | memset(bh->b_data, 0, inode->i_sb->s_blocksize); | |
495 | set_buffer_uptodate(bh); | |
496 | mark_buffer_dirty(bh); | |
497 | } | |
498 | return bh; | |
499 | } | |
500 | return NULL; | |
501 | } | |
502 | ||
503 | struct buffer_head * ufs_bread (struct inode * inode, unsigned fragment, | |
504 | int create, int * err) | |
505 | { | |
506 | struct buffer_head * bh; | |
507 | ||
abf5d15f | 508 | UFSD("ENTER, ino %lu, fragment %u\n", inode->i_ino, fragment); |
1da177e4 LT |
509 | bh = ufs_getfrag (inode, fragment, create, err); |
510 | if (!bh || buffer_uptodate(bh)) | |
511 | return bh; | |
512 | ll_rw_block (READ, 1, &bh); | |
513 | wait_on_buffer (bh); | |
514 | if (buffer_uptodate(bh)) | |
515 | return bh; | |
516 | brelse (bh); | |
517 | *err = -EIO; | |
518 | return NULL; | |
519 | } | |
520 | ||
521 | static int ufs_writepage(struct page *page, struct writeback_control *wbc) | |
522 | { | |
523 | return block_write_full_page(page,ufs_getfrag_block,wbc); | |
524 | } | |
525 | static int ufs_readpage(struct file *file, struct page *page) | |
526 | { | |
527 | return block_read_full_page(page,ufs_getfrag_block); | |
528 | } | |
529 | static int ufs_prepare_write(struct file *file, struct page *page, unsigned from, unsigned to) | |
530 | { | |
531 | return block_prepare_write(page,from,to,ufs_getfrag_block); | |
532 | } | |
533 | static sector_t ufs_bmap(struct address_space *mapping, sector_t block) | |
534 | { | |
535 | return generic_block_bmap(mapping,block,ufs_getfrag_block); | |
536 | } | |
537 | struct address_space_operations ufs_aops = { | |
538 | .readpage = ufs_readpage, | |
539 | .writepage = ufs_writepage, | |
540 | .sync_page = block_sync_page, | |
541 | .prepare_write = ufs_prepare_write, | |
542 | .commit_write = generic_commit_write, | |
543 | .bmap = ufs_bmap | |
544 | }; | |
545 | ||
826843a3 ED |
546 | static void ufs_set_inode_ops(struct inode *inode) |
547 | { | |
548 | if (S_ISREG(inode->i_mode)) { | |
549 | inode->i_op = &ufs_file_inode_operations; | |
550 | inode->i_fop = &ufs_file_operations; | |
551 | inode->i_mapping->a_ops = &ufs_aops; | |
552 | } else if (S_ISDIR(inode->i_mode)) { | |
553 | inode->i_op = &ufs_dir_inode_operations; | |
554 | inode->i_fop = &ufs_dir_operations; | |
555 | inode->i_mapping->a_ops = &ufs_aops; | |
556 | } else if (S_ISLNK(inode->i_mode)) { | |
557 | if (!inode->i_blocks) | |
558 | inode->i_op = &ufs_fast_symlink_inode_operations; | |
559 | else { | |
560 | inode->i_op = &page_symlink_inode_operations; | |
561 | inode->i_mapping->a_ops = &ufs_aops; | |
562 | } | |
563 | } else | |
564 | init_special_inode(inode, inode->i_mode, | |
565 | ufs_get_inode_dev(inode->i_sb, UFS_I(inode))); | |
566 | } | |
567 | ||
1da177e4 LT |
568 | void ufs_read_inode (struct inode * inode) |
569 | { | |
570 | struct ufs_inode_info *ufsi = UFS_I(inode); | |
571 | struct super_block * sb; | |
572 | struct ufs_sb_private_info * uspi; | |
573 | struct ufs_inode * ufs_inode; | |
574 | struct ufs2_inode *ufs2_inode; | |
575 | struct buffer_head * bh; | |
576 | mode_t mode; | |
577 | unsigned i; | |
578 | unsigned flags; | |
579 | ||
abf5d15f | 580 | UFSD("ENTER, ino %lu\n", inode->i_ino); |
1da177e4 LT |
581 | |
582 | sb = inode->i_sb; | |
583 | uspi = UFS_SB(sb)->s_uspi; | |
584 | flags = UFS_SB(sb)->s_flags; | |
585 | ||
586 | if (inode->i_ino < UFS_ROOTINO || | |
587 | inode->i_ino > (uspi->s_ncg * uspi->s_ipg)) { | |
588 | ufs_warning (sb, "ufs_read_inode", "bad inode number (%lu)\n", inode->i_ino); | |
589 | goto bad_inode; | |
590 | } | |
591 | ||
592 | bh = sb_bread(sb, uspi->s_sbbase + ufs_inotofsba(inode->i_ino)); | |
593 | if (!bh) { | |
594 | ufs_warning (sb, "ufs_read_inode", "unable to read inode %lu\n", inode->i_ino); | |
595 | goto bad_inode; | |
596 | } | |
597 | if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) | |
598 | goto ufs2_inode; | |
599 | ||
600 | ufs_inode = (struct ufs_inode *) (bh->b_data + sizeof(struct ufs_inode) * ufs_inotofsbo(inode->i_ino)); | |
601 | ||
602 | /* | |
603 | * Copy data to the in-core inode. | |
604 | */ | |
605 | inode->i_mode = mode = fs16_to_cpu(sb, ufs_inode->ui_mode); | |
606 | inode->i_nlink = fs16_to_cpu(sb, ufs_inode->ui_nlink); | |
607 | if (inode->i_nlink == 0) | |
608 | ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino); | |
609 | ||
610 | /* | |
611 | * Linux now has 32-bit uid and gid, so we can support EFT. | |
612 | */ | |
613 | inode->i_uid = ufs_get_inode_uid(sb, ufs_inode); | |
614 | inode->i_gid = ufs_get_inode_gid(sb, ufs_inode); | |
615 | ||
616 | inode->i_size = fs64_to_cpu(sb, ufs_inode->ui_size); | |
617 | inode->i_atime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_atime.tv_sec); | |
618 | inode->i_ctime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_ctime.tv_sec); | |
619 | inode->i_mtime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_mtime.tv_sec); | |
620 | inode->i_mtime.tv_nsec = 0; | |
621 | inode->i_atime.tv_nsec = 0; | |
622 | inode->i_ctime.tv_nsec = 0; | |
623 | inode->i_blocks = fs32_to_cpu(sb, ufs_inode->ui_blocks); | |
624 | inode->i_blksize = PAGE_SIZE; /* This is the optimal IO size (for stat) */ | |
625 | inode->i_version++; | |
626 | ufsi->i_flags = fs32_to_cpu(sb, ufs_inode->ui_flags); | |
627 | ufsi->i_gen = fs32_to_cpu(sb, ufs_inode->ui_gen); | |
628 | ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow); | |
629 | ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag); | |
630 | ufsi->i_lastfrag = (inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift; | |
dd187a26 | 631 | ufsi->i_dir_start_lookup = 0; |
1da177e4 LT |
632 | |
633 | if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) { | |
634 | for (i = 0; i < (UFS_NDADDR + UFS_NINDIR); i++) | |
635 | ufsi->i_u1.i_data[i] = ufs_inode->ui_u2.ui_addr.ui_db[i]; | |
dd187a26 | 636 | } else { |
1da177e4 LT |
637 | for (i = 0; i < (UFS_NDADDR + UFS_NINDIR) * 4; i++) |
638 | ufsi->i_u1.i_symlink[i] = ufs_inode->ui_u2.ui_symlink[i]; | |
639 | } | |
640 | ufsi->i_osync = 0; | |
641 | ||
826843a3 | 642 | ufs_set_inode_ops(inode); |
1da177e4 LT |
643 | |
644 | brelse (bh); | |
645 | ||
abf5d15f | 646 | UFSD("EXIT\n"); |
1da177e4 LT |
647 | return; |
648 | ||
649 | bad_inode: | |
650 | make_bad_inode(inode); | |
651 | return; | |
652 | ||
653 | ufs2_inode : | |
abf5d15f | 654 | UFSD("Reading ufs2 inode, ino %lu\n", inode->i_ino); |
1da177e4 LT |
655 | |
656 | ufs2_inode = (struct ufs2_inode *)(bh->b_data + sizeof(struct ufs2_inode) * ufs_inotofsbo(inode->i_ino)); | |
657 | ||
658 | /* | |
659 | * Copy data to the in-core inode. | |
660 | */ | |
661 | inode->i_mode = mode = fs16_to_cpu(sb, ufs2_inode->ui_mode); | |
662 | inode->i_nlink = fs16_to_cpu(sb, ufs2_inode->ui_nlink); | |
663 | if (inode->i_nlink == 0) | |
664 | ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino); | |
665 | ||
666 | /* | |
667 | * Linux now has 32-bit uid and gid, so we can support EFT. | |
668 | */ | |
669 | inode->i_uid = fs32_to_cpu(sb, ufs2_inode->ui_uid); | |
670 | inode->i_gid = fs32_to_cpu(sb, ufs2_inode->ui_gid); | |
671 | ||
672 | inode->i_size = fs64_to_cpu(sb, ufs2_inode->ui_size); | |
673 | inode->i_atime.tv_sec = fs32_to_cpu(sb, ufs2_inode->ui_atime.tv_sec); | |
674 | inode->i_ctime.tv_sec = fs32_to_cpu(sb, ufs2_inode->ui_ctime.tv_sec); | |
675 | inode->i_mtime.tv_sec = fs32_to_cpu(sb, ufs2_inode->ui_mtime.tv_sec); | |
676 | inode->i_mtime.tv_nsec = 0; | |
677 | inode->i_atime.tv_nsec = 0; | |
678 | inode->i_ctime.tv_nsec = 0; | |
679 | inode->i_blocks = fs64_to_cpu(sb, ufs2_inode->ui_blocks); | |
680 | inode->i_blksize = PAGE_SIZE; /*This is the optimal IO size(for stat)*/ | |
681 | ||
682 | inode->i_version++; | |
683 | ufsi->i_flags = fs32_to_cpu(sb, ufs2_inode->ui_flags); | |
684 | ufsi->i_gen = fs32_to_cpu(sb, ufs2_inode->ui_gen); | |
685 | /* | |
686 | ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow); | |
687 | ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag); | |
688 | */ | |
689 | ufsi->i_lastfrag= (inode->i_size + uspi->s_fsize- 1) >> uspi->s_fshift; | |
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]; | |
695 | } | |
696 | else { | |
697 | for (i = 0; i < (UFS_NDADDR + UFS_NINDIR) * 4; i++) | |
698 | ufsi->i_u1.i_symlink[i] = ufs2_inode->ui_u2.ui_symlink[i]; | |
699 | } | |
700 | ufsi->i_osync = 0; | |
701 | ||
826843a3 | 702 | ufs_set_inode_ops(inode); |
1da177e4 LT |
703 | |
704 | brelse(bh); | |
705 | ||
abf5d15f | 706 | UFSD("EXIT\n"); |
1da177e4 LT |
707 | return; |
708 | } | |
709 | ||
710 | static int ufs_update_inode(struct inode * inode, int do_sync) | |
711 | { | |
712 | struct ufs_inode_info *ufsi = UFS_I(inode); | |
713 | struct super_block * sb; | |
714 | struct ufs_sb_private_info * uspi; | |
715 | struct buffer_head * bh; | |
716 | struct ufs_inode * ufs_inode; | |
717 | unsigned i; | |
718 | unsigned flags; | |
719 | ||
abf5d15f | 720 | UFSD("ENTER, ino %lu\n", inode->i_ino); |
1da177e4 LT |
721 | |
722 | sb = inode->i_sb; | |
723 | uspi = UFS_SB(sb)->s_uspi; | |
724 | flags = UFS_SB(sb)->s_flags; | |
725 | ||
726 | if (inode->i_ino < UFS_ROOTINO || | |
727 | inode->i_ino > (uspi->s_ncg * uspi->s_ipg)) { | |
728 | ufs_warning (sb, "ufs_read_inode", "bad inode number (%lu)\n", inode->i_ino); | |
729 | return -1; | |
730 | } | |
731 | ||
732 | bh = sb_bread(sb, ufs_inotofsba(inode->i_ino)); | |
733 | if (!bh) { | |
734 | ufs_warning (sb, "ufs_read_inode", "unable to read inode %lu\n", inode->i_ino); | |
735 | return -1; | |
736 | } | |
737 | ufs_inode = (struct ufs_inode *) (bh->b_data + ufs_inotofsbo(inode->i_ino) * sizeof(struct ufs_inode)); | |
738 | ||
739 | ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode); | |
740 | ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink); | |
741 | ||
742 | ufs_set_inode_uid(sb, ufs_inode, inode->i_uid); | |
743 | ufs_set_inode_gid(sb, ufs_inode, inode->i_gid); | |
744 | ||
745 | ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size); | |
746 | ufs_inode->ui_atime.tv_sec = cpu_to_fs32(sb, inode->i_atime.tv_sec); | |
747 | ufs_inode->ui_atime.tv_usec = 0; | |
748 | ufs_inode->ui_ctime.tv_sec = cpu_to_fs32(sb, inode->i_ctime.tv_sec); | |
749 | ufs_inode->ui_ctime.tv_usec = 0; | |
750 | ufs_inode->ui_mtime.tv_sec = cpu_to_fs32(sb, inode->i_mtime.tv_sec); | |
751 | ufs_inode->ui_mtime.tv_usec = 0; | |
752 | ufs_inode->ui_blocks = cpu_to_fs32(sb, inode->i_blocks); | |
753 | ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags); | |
754 | ufs_inode->ui_gen = cpu_to_fs32(sb, ufsi->i_gen); | |
755 | ||
756 | if ((flags & UFS_UID_MASK) == UFS_UID_EFT) { | |
757 | ufs_inode->ui_u3.ui_sun.ui_shadow = cpu_to_fs32(sb, ufsi->i_shadow); | |
758 | ufs_inode->ui_u3.ui_sun.ui_oeftflag = cpu_to_fs32(sb, ufsi->i_oeftflag); | |
759 | } | |
760 | ||
761 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { | |
762 | /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */ | |
763 | ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.i_data[0]; | |
764 | } else if (inode->i_blocks) { | |
765 | for (i = 0; i < (UFS_NDADDR + UFS_NINDIR); i++) | |
766 | ufs_inode->ui_u2.ui_addr.ui_db[i] = ufsi->i_u1.i_data[i]; | |
767 | } | |
768 | else { | |
769 | for (i = 0; i < (UFS_NDADDR + UFS_NINDIR) * 4; i++) | |
770 | ufs_inode->ui_u2.ui_symlink[i] = ufsi->i_u1.i_symlink[i]; | |
771 | } | |
772 | ||
773 | if (!inode->i_nlink) | |
774 | memset (ufs_inode, 0, sizeof(struct ufs_inode)); | |
775 | ||
776 | mark_buffer_dirty(bh); | |
777 | if (do_sync) | |
778 | sync_dirty_buffer(bh); | |
779 | brelse (bh); | |
780 | ||
abf5d15f | 781 | UFSD("EXIT\n"); |
1da177e4 LT |
782 | return 0; |
783 | } | |
784 | ||
785 | int ufs_write_inode (struct inode * inode, int wait) | |
786 | { | |
787 | int ret; | |
788 | lock_kernel(); | |
789 | ret = ufs_update_inode (inode, wait); | |
790 | unlock_kernel(); | |
791 | return ret; | |
792 | } | |
793 | ||
794 | int ufs_sync_inode (struct inode *inode) | |
795 | { | |
796 | return ufs_update_inode (inode, 1); | |
797 | } | |
798 | ||
799 | void ufs_delete_inode (struct inode * inode) | |
800 | { | |
fef26658 | 801 | truncate_inode_pages(&inode->i_data, 0); |
1da177e4 LT |
802 | /*UFS_I(inode)->i_dtime = CURRENT_TIME;*/ |
803 | lock_kernel(); | |
804 | mark_inode_dirty(inode); | |
805 | ufs_update_inode(inode, IS_SYNC(inode)); | |
806 | inode->i_size = 0; | |
807 | if (inode->i_blocks) | |
808 | ufs_truncate (inode); | |
809 | ufs_free_inode (inode); | |
810 | unlock_kernel(); | |
811 | } |