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[PATCH] fuse: fix bug in control filesystem mount
[thirdparty/kernel/linux.git] / fs / ufs / inode.c
CommitLineData
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		 44static u64 ufs_frag_map(struct inode *inode, sector_t frag);
45
1da177e4
LT		 46static 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 85static 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;
131ufs2:
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
154out:
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 */
172static struct buffer_head *
173ufs_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
199repeat:
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
ED		 244 goal, required + blockoff,
245 err, locked_page);
1da177e4
LT		 246 }
247 /*
248 * We will extend last allocated block
249 */
250 else if (lastblock == block) {
6ef4d6bf
ED		 251 tmp = ufs_new_fragments(inode, p, fragment - (blockoff - lastblockoff),
252 fs32_to_cpu(sb, *p), required + (blockoff - lastblockoff),
253 err, locked_page);
c37336b0 254 } else /* (lastblock > block) */ {
1da177e4
LT		 255 /*
256 * We will allocate new block before last allocated block
257 */
c37336b0
ED		 258 if (block) {
259 tmp = fs32_to_cpu(sb, ufsi->i_u1.i_data[block-1]);
260 if (tmp)
261 goal = tmp + uspi->s_fpb;
262 }
6ef4d6bf
ED		 263 tmp = ufs_new_fragments(inode, p, fragment - blockoff,
264 goal, uspi->s_fpb, err, locked_page);
1da177e4
LT		 265 }
266 if (!tmp) {
267 if ((!blockoff && *p) ||
268 (blockoff && lastfrag != ufsi->i_lastfrag))
269 goto repeat;
270 *err = -ENOSPC;
271 return NULL;
272 }
273
022a6dc5 274 if (!phys) {
d63b7090 275 result = sb_getblk(sb, tmp + blockoff);
1da177e4 276 } else {
c9a27b5d 277 *phys = tmp + blockoff;
1da177e4
LT		 278 result = NULL;
279 *err = 0;
280 *new = 1;
281 }
282
283 inode->i_ctime = CURRENT_TIME_SEC;
284 if (IS_SYNC(inode))
285 ufs_sync_inode (inode);
286 mark_inode_dirty(inode);
abf5d15f 287 UFSD("EXIT, result %u\n", tmp + blockoff);
1da177e4
LT		 288 return result;
289
290 /* This part : To be implemented ....
291 Required only for writing, not required for READ-ONLY.
292ufs2:
293
294 u2_block = ufs_fragstoblks(fragment);
295 u2_blockoff = ufs_fragnum(fragment);
296 p = ufsi->i_u1.u2_i_data + block;
297 goal = 0;
298
299repeat2:
300 tmp = fs32_to_cpu(sb, *p);
301 lastfrag = ufsi->i_lastfrag;
302
303 */
304}
305
022a6dc5
ED		 306/**
307 * ufs_inode_getblock() - allocate new block
308 * @inode - pointer to inode
309 * @bh - pointer to block which hold "pointer" to new allocated block
310 * @fragment - number of `fragment' which hold pointer
311 * to new allocated block
312 * @new_fragment - number of new allocated fragment
313 * (block will hold this fragment and also uspi->s_fpb-1)
314 * @err - see ufs_inode_getfrag()
315 * @phys - see ufs_inode_getfrag()
316 * @new - see ufs_inode_getfrag()
317 * @locked_page - see ufs_inode_getfrag()
318 */
319static struct buffer_head *
320ufs_inode_getblock(struct inode *inode, struct buffer_head *bh,
321 unsigned int fragment, sector_t new_fragment, int *err,
322 long *phys, int *new, struct page *locked_page)
1da177e4 323{
022a6dc5
ED		 324 struct super_block *sb = inode->i_sb;
325 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
1da177e4
LT		 326 struct buffer_head * result;
327 unsigned tmp, goal, block, blockoff;
328 __fs32 * p;
329
1da177e4
LT		 330 block = ufs_fragstoblks (fragment);
331 blockoff = ufs_fragnum (fragment);
332
022a6dc5
ED		 333 UFSD("ENTER, ino %lu, fragment %u, new_fragment %llu, metadata %d\n",
334 inode->i_ino, fragment, (unsigned long long)new_fragment, !phys);
1da177e4
LT		 335
336 result = NULL;
337 if (!bh)
338 goto out;
339 if (!buffer_uptodate(bh)) {
340 ll_rw_block (READ, 1, &bh);
341 wait_on_buffer (bh);
342 if (!buffer_uptodate(bh))
343 goto out;
344 }
345
346 p = (__fs32 *) bh->b_data + block;
347repeat:
348 tmp = fs32_to_cpu(sb, *p);
349 if (tmp) {
022a6dc5 350 if (!phys) {
1da177e4
LT		 351 result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff);
352 if (tmp == fs32_to_cpu(sb, *p))
353 goto out;
354 brelse (result);
355 goto repeat;
356 } else {
c9a27b5d 357 *phys = tmp + blockoff;
1da177e4
LT		 358 goto out;
359 }
360 }
361
c37336b0 362 if (block && (tmp = fs32_to_cpu(sb, ((__fs32*)bh->b_data)[block-1])))
1da177e4
LT		 363 goal = tmp + uspi->s_fpb;
364 else
365 goal = bh->b_blocknr + uspi->s_fpb;
6ef4d6bf
ED		 366 tmp = ufs_new_fragments(inode, p, ufs_blknum(new_fragment), goal,
367 uspi->s_fpb, err, locked_page);
1da177e4
LT		 368 if (!tmp) {
369 if (fs32_to_cpu(sb, *p))
370 goto repeat;
371 goto out;
372 }
373
c9a27b5d 374
022a6dc5 375 if (!phys) {
d63b7090 376 result = sb_getblk(sb, tmp + blockoff);
1da177e4 377 } else {
c9a27b5d 378 *phys = tmp + blockoff;
1da177e4
LT		 379 *new = 1;
380 }
381
382 mark_buffer_dirty(bh);
383 if (IS_SYNC(inode))
384 sync_dirty_buffer(bh);
385 inode->i_ctime = CURRENT_TIME_SEC;
386 mark_inode_dirty(inode);
abf5d15f 387 UFSD("result %u\n", tmp + blockoff);
1da177e4
LT		 388out:
389 brelse (bh);
abf5d15f 390 UFSD("EXIT\n");
1da177e4
LT		 391 return result;
392}
393
022a6dc5
ED		 394/**
395 * ufs_getfrag_bloc() - `get_block_t' function, interface between UFS and
396 * readpage, writepage and so on
1da177e4
LT		 397 */
398
022a6dc5 399int ufs_getfrag_block(struct inode *inode, sector_t fragment, struct buffer_head *bh_result, int create)
1da177e4
LT		 400{
401 struct super_block * sb = inode->i_sb;
402 struct ufs_sb_private_info * uspi = UFS_SB(sb)->s_uspi;
403 struct buffer_head * bh;
404 int ret, err, new;
405 unsigned long ptr,phys;
406 u64 phys64 = 0;
407
408 if (!create) {
409 phys64 = ufs_frag_map(inode, fragment);
7256d819 410 UFSD("phys64 = %llu\n", (unsigned long long)phys64);
1da177e4
LT		 411 if (phys64)
412 map_bh(bh_result, sb, phys64);
413 return 0;
414 }
415
416 /* This code entered only while writing ....? */
417
418 err = -EIO;
419 new = 0;
420 ret = 0;
421 bh = NULL;
422
423 lock_kernel();
424
abf5d15f 425 UFSD("ENTER, ino %lu, fragment %llu\n", inode->i_ino, (unsigned long long)fragment);
1da177e4
LT		 426 if (fragment < 0)
427 goto abort_negative;
428 if (fragment >
429 ((UFS_NDADDR + uspi->s_apb + uspi->s_2apb + uspi->s_3apb)
430 << uspi->s_fpbshift))
431 goto abort_too_big;
432
433 err = 0;
434 ptr = fragment;
435
436 /*
437 * ok, these macros clean the logic up a bit and make
438 * it much more readable:
439 */
440#define GET_INODE_DATABLOCK(x) \
022a6dc5 441 ufs_inode_getfrag(inode, x, fragment, 1, &err, &phys, &new, bh_result->b_page)
1da177e4 442#define GET_INODE_PTR(x) \
d63b7090 443 ufs_inode_getfrag(inode, x, fragment, uspi->s_fpb, &err, NULL, NULL, NULL)
1da177e4 444#define GET_INDIRECT_DATABLOCK(x) \
022a6dc5 445 ufs_inode_getblock(inode, bh, x, fragment, \
d63b7090 446 &err, &phys, &new, bh_result->b_page)
1da177e4 447#define GET_INDIRECT_PTR(x) \
022a6dc5 448 ufs_inode_getblock(inode, bh, x, fragment, \
d63b7090 449 &err, NULL, NULL, NULL)
1da177e4
LT		 450
451 if (ptr < UFS_NDIR_FRAGMENT) {
452 bh = GET_INODE_DATABLOCK(ptr);
453 goto out;
454 }
455 ptr -= UFS_NDIR_FRAGMENT;
456 if (ptr < (1 << (uspi->s_apbshift + uspi->s_fpbshift))) {
457 bh = GET_INODE_PTR(UFS_IND_FRAGMENT + (ptr >> uspi->s_apbshift));
458 goto get_indirect;
459 }
460 ptr -= 1 << (uspi->s_apbshift + uspi->s_fpbshift);
461 if (ptr < (1 << (uspi->s_2apbshift + uspi->s_fpbshift))) {
462 bh = GET_INODE_PTR(UFS_DIND_FRAGMENT + (ptr >> uspi->s_2apbshift));
463 goto get_double;
464 }
465 ptr -= 1 << (uspi->s_2apbshift + uspi->s_fpbshift);
466 bh = GET_INODE_PTR(UFS_TIND_FRAGMENT + (ptr >> uspi->s_3apbshift));
467 bh = GET_INDIRECT_PTR((ptr >> uspi->s_2apbshift) & uspi->s_apbmask);
468get_double:
469 bh = GET_INDIRECT_PTR((ptr >> uspi->s_apbshift) & uspi->s_apbmask);
470get_indirect:
471 bh = GET_INDIRECT_DATABLOCK(ptr & uspi->s_apbmask);
472
473#undef GET_INODE_DATABLOCK
474#undef GET_INODE_PTR
475#undef GET_INDIRECT_DATABLOCK
476#undef GET_INDIRECT_PTR
477
478out:
479 if (err)
480 goto abort;
481 if (new)
482 set_buffer_new(bh_result);
483 map_bh(bh_result, sb, phys);
484abort:
485 unlock_kernel();
486 return err;
487
488abort_negative:
489 ufs_warning(sb, "ufs_get_block", "block < 0");
490 goto abort;
491
492abort_too_big:
493 ufs_warning(sb, "ufs_get_block", "block > big");
494 goto abort;
495}
496
138bb68a
AB		 497static struct buffer_head *ufs_getfrag(struct inode *inode,
498 unsigned int fragment,
499 int create, int *err)
1da177e4
LT		 500{
501 struct buffer_head dummy;
502 int error;
503
504 dummy.b_state = 0;
505 dummy.b_blocknr = -1000;
506 error = ufs_getfrag_block(inode, fragment, &dummy, create);
507 *err = error;
508 if (!error && buffer_mapped(&dummy)) {
509 struct buffer_head *bh;
510 bh = sb_getblk(inode->i_sb, dummy.b_blocknr);
511 if (buffer_new(&dummy)) {
512 memset(bh->b_data, 0, inode->i_sb->s_blocksize);
513 set_buffer_uptodate(bh);
514 mark_buffer_dirty(bh);
515 }
516 return bh;
517 }
518 return NULL;
519}
520
521struct buffer_head * ufs_bread (struct inode * inode, unsigned fragment,
522 int create, int * err)
523{
524 struct buffer_head * bh;
525
abf5d15f 526 UFSD("ENTER, ino %lu, fragment %u\n", inode->i_ino, fragment);
1da177e4
LT		 527 bh = ufs_getfrag (inode, fragment, create, err);
528 if (!bh || buffer_uptodate(bh))
529 return bh;
530 ll_rw_block (READ, 1, &bh);
531 wait_on_buffer (bh);
532 if (buffer_uptodate(bh))
533 return bh;
534 brelse (bh);
535 *err = -EIO;
536 return NULL;
537}
538
539static int ufs_writepage(struct page *page, struct writeback_control *wbc)
540{
541 return block_write_full_page(page,ufs_getfrag_block,wbc);
542}
543static int ufs_readpage(struct file *file, struct page *page)
544{
545 return block_read_full_page(page,ufs_getfrag_block);
546}
547static int ufs_prepare_write(struct file *file, struct page *page, unsigned from, unsigned to)
548{
549 return block_prepare_write(page,from,to,ufs_getfrag_block);
550}
551static sector_t ufs_bmap(struct address_space *mapping, sector_t block)
552{
553 return generic_block_bmap(mapping,block,ufs_getfrag_block);
554}
f5e54d6e 555const struct address_space_operations ufs_aops = {
1da177e4
LT		 556 .readpage = ufs_readpage,
557 .writepage = ufs_writepage,
558 .sync_page = block_sync_page,
559 .prepare_write = ufs_prepare_write,
560 .commit_write = generic_commit_write,
561 .bmap = ufs_bmap
562};
563
826843a3
ED		 564static void ufs_set_inode_ops(struct inode *inode)
565{
566 if (S_ISREG(inode->i_mode)) {
567 inode->i_op = &ufs_file_inode_operations;
568 inode->i_fop = &ufs_file_operations;
569 inode->i_mapping->a_ops = &ufs_aops;
570 } else if (S_ISDIR(inode->i_mode)) {
571 inode->i_op = &ufs_dir_inode_operations;
572 inode->i_fop = &ufs_dir_operations;
573 inode->i_mapping->a_ops = &ufs_aops;
574 } else if (S_ISLNK(inode->i_mode)) {
575 if (!inode->i_blocks)
576 inode->i_op = &ufs_fast_symlink_inode_operations;
577 else {
578 inode->i_op = &page_symlink_inode_operations;
579 inode->i_mapping->a_ops = &ufs_aops;
580 }
581 } else
582 init_special_inode(inode, inode->i_mode,
583 ufs_get_inode_dev(inode->i_sb, UFS_I(inode)));
584}
585
05f225dc 586static void ufs1_read_inode(struct inode *inode, struct ufs_inode *ufs_inode)
1da177e4
LT		 587{
588 struct ufs_inode_info *ufsi = UFS_I(inode);
05f225dc 589 struct super_block *sb = inode->i_sb;
1da177e4
LT		 590 mode_t mode;
591 unsigned i;
1da177e4
LT		 592
593 /*
594 * Copy data to the in-core inode.
595 */
596 inode->i_mode = mode = fs16_to_cpu(sb, ufs_inode->ui_mode);
597 inode->i_nlink = fs16_to_cpu(sb, ufs_inode->ui_nlink);
598 if (inode->i_nlink == 0)
599 ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino);
600
601 /*
602 * Linux now has 32-bit uid and gid, so we can support EFT.
603 */
604 inode->i_uid = ufs_get_inode_uid(sb, ufs_inode);
605 inode->i_gid = ufs_get_inode_gid(sb, ufs_inode);
606
607 inode->i_size = fs64_to_cpu(sb, ufs_inode->ui_size);
608 inode->i_atime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_atime.tv_sec);
609 inode->i_ctime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_ctime.tv_sec);
610 inode->i_mtime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_mtime.tv_sec);
611 inode->i_mtime.tv_nsec = 0;
612 inode->i_atime.tv_nsec = 0;
613 inode->i_ctime.tv_nsec = 0;
614 inode->i_blocks = fs32_to_cpu(sb, ufs_inode->ui_blocks);
1da177e4
LT		 615 ufsi->i_flags = fs32_to_cpu(sb, ufs_inode->ui_flags);
616 ufsi->i_gen = fs32_to_cpu(sb, ufs_inode->ui_gen);
617 ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow);
618 ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag);
05f225dc 619
1da177e4
LT		 620
621 if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) {
622 for (i = 0; i < (UFS_NDADDR + UFS_NINDIR); i++)
623 ufsi->i_u1.i_data[i] = ufs_inode->ui_u2.ui_addr.ui_db[i];
dd187a26 624 } else {
1da177e4
LT		 625 for (i = 0; i < (UFS_NDADDR + UFS_NINDIR) * 4; i++)
626 ufsi->i_u1.i_symlink[i] = ufs_inode->ui_u2.ui_symlink[i];
627 }
05f225dc 628}
1da177e4 629
05f225dc
ED		 630static void ufs2_read_inode(struct inode *inode, struct ufs2_inode *ufs2_inode)
631{
632 struct ufs_inode_info *ufsi = UFS_I(inode);
633 struct super_block *sb = inode->i_sb;
634 mode_t mode;
635 unsigned i;
1da177e4 636
abf5d15f 637 UFSD("Reading ufs2 inode, ino %lu\n", inode->i_ino);
1da177e4
LT		 638 /*
639 * Copy data to the in-core inode.
640 */
641 inode->i_mode = mode = fs16_to_cpu(sb, ufs2_inode->ui_mode);
642 inode->i_nlink = fs16_to_cpu(sb, ufs2_inode->ui_nlink);
643 if (inode->i_nlink == 0)
644 ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino);
645
646 /*
647 * Linux now has 32-bit uid and gid, so we can support EFT.
648 */
649 inode->i_uid = fs32_to_cpu(sb, ufs2_inode->ui_uid);
650 inode->i_gid = fs32_to_cpu(sb, ufs2_inode->ui_gid);
651
652 inode->i_size = fs64_to_cpu(sb, ufs2_inode->ui_size);
653 inode->i_atime.tv_sec = fs32_to_cpu(sb, ufs2_inode->ui_atime.tv_sec);
654 inode->i_ctime.tv_sec = fs32_to_cpu(sb, ufs2_inode->ui_ctime.tv_sec);
655 inode->i_mtime.tv_sec = fs32_to_cpu(sb, ufs2_inode->ui_mtime.tv_sec);
656 inode->i_mtime.tv_nsec = 0;
657 inode->i_atime.tv_nsec = 0;
658 inode->i_ctime.tv_nsec = 0;
659 inode->i_blocks = fs64_to_cpu(sb, ufs2_inode->ui_blocks);
1da177e4
LT		 660 ufsi->i_flags = fs32_to_cpu(sb, ufs2_inode->ui_flags);
661 ufsi->i_gen = fs32_to_cpu(sb, ufs2_inode->ui_gen);
662 /*
663 ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow);
664 ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag);
665 */
1da177e4
LT		 666
667 if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) {
668 for (i = 0; i < (UFS_NDADDR + UFS_NINDIR); i++)
669 ufsi->i_u1.u2_i_data[i] =
670 ufs2_inode->ui_u2.ui_addr.ui_db[i];
05f225dc 671 } else {
1da177e4
LT		 672 for (i = 0; i < (UFS_NDADDR + UFS_NINDIR) * 4; i++)
673 ufsi->i_u1.i_symlink[i] = ufs2_inode->ui_u2.ui_symlink[i];
674 }
05f225dc
ED		 675}
676
677void ufs_read_inode(struct inode * inode)
678{
679 struct ufs_inode_info *ufsi = UFS_I(inode);
680 struct super_block * sb;
681 struct ufs_sb_private_info * uspi;
682 struct buffer_head * bh;
683
684 UFSD("ENTER, ino %lu\n", inode->i_ino);
685
686 sb = inode->i_sb;
687 uspi = UFS_SB(sb)->s_uspi;
688
689 if (inode->i_ino < UFS_ROOTINO ||
690 inode->i_ino > (uspi->s_ncg * uspi->s_ipg)) {
691 ufs_warning(sb, "ufs_read_inode", "bad inode number (%lu)\n",
692 inode->i_ino);
693 goto bad_inode;
694 }
695
696 bh = sb_bread(sb, uspi->s_sbbase + ufs_inotofsba(inode->i_ino));
697 if (!bh) {
698 ufs_warning(sb, "ufs_read_inode", "unable to read inode %lu\n",
699 inode->i_ino);
700 goto bad_inode;
701 }
702 if ((UFS_SB(sb)->s_flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
703 struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data;
704
705 ufs2_read_inode(inode,
706 ufs2_inode + ufs_inotofsbo(inode->i_ino));
707 } else {
708 struct ufs_inode *ufs_inode = (struct ufs_inode *)bh->b_data;
709
710 ufs1_read_inode(inode, ufs_inode + ufs_inotofsbo(inode->i_ino));
711 }
712
05f225dc
ED		 713 inode->i_version++;
714 ufsi->i_lastfrag =
715 (inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift;
716 ufsi->i_dir_start_lookup = 0;
1da177e4
LT		 717 ufsi->i_osync = 0;
718
826843a3 719 ufs_set_inode_ops(inode);
1da177e4
LT		 720
721 brelse(bh);
722
abf5d15f 723 UFSD("EXIT\n");
1da177e4 724 return;
05f225dc
ED		 725
726bad_inode:
727 make_bad_inode(inode);
1da177e4
LT		 728}
729
730static int ufs_update_inode(struct inode * inode, int do_sync)
731{
732 struct ufs_inode_info *ufsi = UFS_I(inode);
733 struct super_block * sb;
734 struct ufs_sb_private_info * uspi;
735 struct buffer_head * bh;
736 struct ufs_inode * ufs_inode;
737 unsigned i;
738 unsigned flags;
739
abf5d15f 740 UFSD("ENTER, ino %lu\n", inode->i_ino);
1da177e4
LT		 741
742 sb = inode->i_sb;
743 uspi = UFS_SB(sb)->s_uspi;
744 flags = UFS_SB(sb)->s_flags;
745
746 if (inode->i_ino < UFS_ROOTINO ||
747 inode->i_ino > (uspi->s_ncg * uspi->s_ipg)) {
748 ufs_warning (sb, "ufs_read_inode", "bad inode number (%lu)\n", inode->i_ino);
749 return -1;
750 }
751
752 bh = sb_bread(sb, ufs_inotofsba(inode->i_ino));
753 if (!bh) {
754 ufs_warning (sb, "ufs_read_inode", "unable to read inode %lu\n", inode->i_ino);
755 return -1;
756 }
757 ufs_inode = (struct ufs_inode *) (bh->b_data + ufs_inotofsbo(inode->i_ino) * sizeof(struct ufs_inode));
758
759 ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode);
760 ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink);
761
762 ufs_set_inode_uid(sb, ufs_inode, inode->i_uid);
763 ufs_set_inode_gid(sb, ufs_inode, inode->i_gid);
764
765 ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size);
766 ufs_inode->ui_atime.tv_sec = cpu_to_fs32(sb, inode->i_atime.tv_sec);
767 ufs_inode->ui_atime.tv_usec = 0;
768 ufs_inode->ui_ctime.tv_sec = cpu_to_fs32(sb, inode->i_ctime.tv_sec);
769 ufs_inode->ui_ctime.tv_usec = 0;
770 ufs_inode->ui_mtime.tv_sec = cpu_to_fs32(sb, inode->i_mtime.tv_sec);
771 ufs_inode->ui_mtime.tv_usec = 0;
772 ufs_inode->ui_blocks = cpu_to_fs32(sb, inode->i_blocks);
773 ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags);
774 ufs_inode->ui_gen = cpu_to_fs32(sb, ufsi->i_gen);
775
776 if ((flags & UFS_UID_MASK) == UFS_UID_EFT) {
777 ufs_inode->ui_u3.ui_sun.ui_shadow = cpu_to_fs32(sb, ufsi->i_shadow);
778 ufs_inode->ui_u3.ui_sun.ui_oeftflag = cpu_to_fs32(sb, ufsi->i_oeftflag);
779 }
780
781 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
782 /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */
783 ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.i_data[0];
784 } else if (inode->i_blocks) {
785 for (i = 0; i < (UFS_NDADDR + UFS_NINDIR); i++)
786 ufs_inode->ui_u2.ui_addr.ui_db[i] = ufsi->i_u1.i_data[i];
787 }
788 else {
789 for (i = 0; i < (UFS_NDADDR + UFS_NINDIR) * 4; i++)
790 ufs_inode->ui_u2.ui_symlink[i] = ufsi->i_u1.i_symlink[i];
791 }
792
793 if (!inode->i_nlink)
794 memset (ufs_inode, 0, sizeof(struct ufs_inode));
795
796 mark_buffer_dirty(bh);
797 if (do_sync)
798 sync_dirty_buffer(bh);
799 brelse (bh);
800
abf5d15f 801 UFSD("EXIT\n");
1da177e4
LT		 802 return 0;
803}
804
805int ufs_write_inode (struct inode * inode, int wait)
806{
807 int ret;
808 lock_kernel();
809 ret = ufs_update_inode (inode, wait);
810 unlock_kernel();
811 return ret;
812}
813
814int ufs_sync_inode (struct inode *inode)
815{
816 return ufs_update_inode (inode, 1);
817}
818
819void ufs_delete_inode (struct inode * inode)
820{
10e5dce0
ED		 821 loff_t old_i_size;
822
fef26658 823 truncate_inode_pages(&inode->i_data, 0);
1da177e4
LT		 824 /*UFS_I(inode)->i_dtime = CURRENT_TIME;*/
825 lock_kernel();
826 mark_inode_dirty(inode);
827 ufs_update_inode(inode, IS_SYNC(inode));
10e5dce0 828 old_i_size = inode->i_size;
1da177e4 829 inode->i_size = 0;
10e5dce0
ED		 830 if (inode->i_blocks && ufs_truncate(inode, old_i_size))
831 ufs_warning(inode->i_sb, __FUNCTION__, "ufs_truncate failed\n");
1da177e4
LT		 832 ufs_free_inode (inode);
833 unlock_kernel();
834}
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