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