ufs: convert to new aops
[linux-2.6.git] / fs / ufs / inode.c
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 static u64 ufs_frag_map(struct inode *inode, sector_t frag);
45
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
57         UFSD("ptrs=uspi->s_apb = %d,double_blocks=%ld \n",ptrs,double_blocks);
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
85 static u64 ufs_frag_map(struct inode *inode, sector_t frag)
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
100         UFSD(": frag = %llu  depth = %d\n", (unsigned long long)frag, depth);
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);
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
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, u64 fragment,
174                   sector_t new_fragment, unsigned int required, int *err,
175                   long *phys, int *new, struct page *locked_page)
176 {
177         struct ufs_inode_info *ufsi = UFS_I(inode);
178         struct super_block *sb = inode->i_sb;
179         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
180         struct buffer_head * result;
181         unsigned blockoff, lastblockoff;
182         u64 tmp, goal, lastfrag, block, lastblock;
183         void *p, *p2;
184
185         UFSD("ENTER, ino %lu, fragment %llu, new_fragment %llu, required %u, "
186              "metadata %d\n", inode->i_ino, (unsigned long long)fragment,
187              (unsigned long long)new_fragment, required, !phys);
188
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 = ufs_get_direct_data_ptr(uspi, ufsi, block);
197
198         goal = 0;
199
200 repeat:
201         tmp = ufs_data_ptr_to_cpu(sb, p);
202
203         lastfrag = ufsi->i_lastfrag;
204         if (tmp && fragment < lastfrag) {
205                 if (!phys) {
206                         result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff);
207                         if (tmp == ufs_data_ptr_to_cpu(sb, p)) {
208                                 UFSD("EXIT, result %llu\n",
209                                      (unsigned long long)tmp + blockoff);
210                                 return result;
211                         }
212                         brelse (result);
213                         goto repeat;
214                 } else {
215                         *phys = uspi->s_sbbase + tmp + blockoff;
216                         return NULL;
217                 }
218         }
219
220         lastblock = ufs_fragstoblks (lastfrag);
221         lastblockoff = ufs_fragnum (lastfrag);
222         /*
223          * We will extend file into new block beyond last allocated block
224          */
225         if (lastblock < block) {
226                 /*
227                  * We must reallocate last allocated block
228                  */
229                 if (lastblockoff) {
230                         p2 = ufs_get_direct_data_ptr(uspi, ufsi, lastblock);
231                         tmp = ufs_new_fragments(inode, p2, lastfrag,
232                                                 ufs_data_ptr_to_cpu(sb, p2),
233                                                 uspi->s_fpb - lastblockoff,
234                                                 err, locked_page);
235                         if (!tmp) {
236                                 if (lastfrag != ufsi->i_lastfrag)
237                                         goto repeat;
238                                 else
239                                         return NULL;
240                         }
241                         lastfrag = ufsi->i_lastfrag;
242                         
243                 }
244                 tmp = ufs_data_ptr_to_cpu(sb,
245                                          ufs_get_direct_data_ptr(uspi, ufsi,
246                                                                  lastblock));
247                 if (tmp)
248                         goal = tmp + uspi->s_fpb;
249                 tmp = ufs_new_fragments (inode, p, fragment - blockoff, 
250                                          goal, required + blockoff,
251                                          err,
252                                          phys != NULL ? locked_page : NULL);
253         } else if (lastblock == block) {
254         /*
255          * We will extend last allocated block
256          */
257                 tmp = ufs_new_fragments(inode, p, fragment -
258                                         (blockoff - lastblockoff),
259                                         ufs_data_ptr_to_cpu(sb, p),
260                                         required +  (blockoff - lastblockoff),
261                                         err, phys != NULL ? locked_page : NULL);
262         } else /* (lastblock > block) */ {
263         /*
264          * We will allocate new block before last allocated block
265          */
266                 if (block) {
267                         tmp = ufs_data_ptr_to_cpu(sb,
268                                                  ufs_get_direct_data_ptr(uspi, ufsi, block - 1));
269                         if (tmp)
270                                 goal = tmp + uspi->s_fpb;
271                 }
272                 tmp = ufs_new_fragments(inode, p, fragment - blockoff,
273                                         goal, uspi->s_fpb, err,
274                                         phys != NULL ? locked_page : NULL);
275         }
276         if (!tmp) {
277                 if ((!blockoff && ufs_data_ptr_to_cpu(sb, p)) ||
278                     (blockoff && lastfrag != ufsi->i_lastfrag))
279                         goto repeat;
280                 *err = -ENOSPC;
281                 return NULL;
282         }
283
284         if (!phys) {
285                 result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff);
286         } else {
287                 *phys = uspi->s_sbbase + tmp + blockoff;
288                 result = NULL;
289                 *err = 0;
290                 *new = 1;
291         }
292
293         inode->i_ctime = CURRENT_TIME_SEC;
294         if (IS_SYNC(inode))
295                 ufs_sync_inode (inode);
296         mark_inode_dirty(inode);
297         UFSD("EXIT, result %llu\n", (unsigned long long)tmp + blockoff);
298         return result;
299
300      /* This part : To be implemented ....
301         Required only for writing, not required for READ-ONLY.
302 ufs2:
303
304         u2_block = ufs_fragstoblks(fragment);
305         u2_blockoff = ufs_fragnum(fragment);
306         p = ufsi->i_u1.u2_i_data + block;
307         goal = 0;
308
309 repeat2:
310         tmp = fs32_to_cpu(sb, *p);
311         lastfrag = ufsi->i_lastfrag;
312
313      */
314 }
315
316 /**
317  * ufs_inode_getblock() - allocate new block
318  * @inode - pointer to inode
319  * @bh - pointer to block which hold "pointer" to new allocated block
320  * @fragment - number of `fragment' which hold pointer
321  *   to new allocated block
322  * @new_fragment - number of new allocated fragment
323  *  (block will hold this fragment and also uspi->s_fpb-1)
324  * @err - see ufs_inode_getfrag()
325  * @phys - see ufs_inode_getfrag()
326  * @new - see ufs_inode_getfrag()
327  * @locked_page - see ufs_inode_getfrag()
328  */
329 static struct buffer_head *
330 ufs_inode_getblock(struct inode *inode, struct buffer_head *bh,
331                   u64 fragment, sector_t new_fragment, int *err,
332                   long *phys, int *new, struct page *locked_page)
333 {
334         struct super_block *sb = inode->i_sb;
335         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
336         struct buffer_head * result;
337         unsigned blockoff;
338         u64 tmp, goal, block;
339         void *p;
340
341         block = ufs_fragstoblks (fragment);
342         blockoff = ufs_fragnum (fragment);
343
344         UFSD("ENTER, ino %lu, fragment %llu, new_fragment %llu, metadata %d\n",
345              inode->i_ino, (unsigned long long)fragment,
346              (unsigned long long)new_fragment, !phys);
347
348         result = NULL;
349         if (!bh)
350                 goto out;
351         if (!buffer_uptodate(bh)) {
352                 ll_rw_block (READ, 1, &bh);
353                 wait_on_buffer (bh);
354                 if (!buffer_uptodate(bh))
355                         goto out;
356         }
357         if (uspi->fs_magic == UFS2_MAGIC)
358                 p = (__fs64 *)bh->b_data + block;
359         else
360                 p = (__fs32 *)bh->b_data + block;
361 repeat:
362         tmp = ufs_data_ptr_to_cpu(sb, p);
363         if (tmp) {
364                 if (!phys) {
365                         result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff);
366                         if (tmp == ufs_data_ptr_to_cpu(sb, p))
367                                 goto out;
368                         brelse (result);
369                         goto repeat;
370                 } else {
371                         *phys = uspi->s_sbbase + tmp + blockoff;
372                         goto out;
373                 }
374         }
375
376         if (block && (uspi->fs_magic == UFS2_MAGIC ?
377                       (tmp = fs64_to_cpu(sb, ((__fs64 *)bh->b_data)[block-1])) :
378                       (tmp = fs32_to_cpu(sb, ((__fs32 *)bh->b_data)[block-1]))))
379                 goal = tmp + uspi->s_fpb;
380         else
381                 goal = bh->b_blocknr + uspi->s_fpb;
382         tmp = ufs_new_fragments(inode, p, ufs_blknum(new_fragment), goal,
383                                 uspi->s_fpb, err, locked_page);
384         if (!tmp) {
385                 if (ufs_data_ptr_to_cpu(sb, p))
386                         goto repeat;
387                 goto out;
388         }               
389
390
391         if (!phys) {
392                 result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff);
393         } else {
394                 *phys = uspi->s_sbbase + tmp + blockoff;
395                 *new = 1;
396         }
397
398         mark_buffer_dirty(bh);
399         if (IS_SYNC(inode))
400                 sync_dirty_buffer(bh);
401         inode->i_ctime = CURRENT_TIME_SEC;
402         mark_inode_dirty(inode);
403         UFSD("result %llu\n", (unsigned long long)tmp + blockoff);
404 out:
405         brelse (bh);
406         UFSD("EXIT\n");
407         return result;
408 }
409
410 /**
411  * ufs_getfrag_bloc() - `get_block_t' function, interface between UFS and
412  * readpage, writepage and so on
413  */
414
415 int ufs_getfrag_block(struct inode *inode, sector_t fragment, struct buffer_head *bh_result, int create)
416 {
417         struct super_block * sb = inode->i_sb;
418         struct ufs_sb_private_info * uspi = UFS_SB(sb)->s_uspi;
419         struct buffer_head * bh;
420         int ret, err, new;
421         unsigned long ptr,phys;
422         u64 phys64 = 0;
423         
424         if (!create) {
425                 phys64 = ufs_frag_map(inode, fragment);
426                 UFSD("phys64 = %llu\n", (unsigned long long)phys64);
427                 if (phys64)
428                         map_bh(bh_result, sb, phys64);
429                 return 0;
430         }
431
432         /* This code entered only while writing ....? */
433
434         err = -EIO;
435         new = 0;
436         ret = 0;
437         bh = NULL;
438
439         lock_kernel();
440
441         UFSD("ENTER, ino %lu, fragment %llu\n", inode->i_ino, (unsigned long long)fragment);
442         if (fragment < 0)
443                 goto abort_negative;
444         if (fragment >
445             ((UFS_NDADDR + uspi->s_apb + uspi->s_2apb + uspi->s_3apb)
446              << uspi->s_fpbshift))
447                 goto abort_too_big;
448
449         err = 0;
450         ptr = fragment;
451           
452         /*
453          * ok, these macros clean the logic up a bit and make
454          * it much more readable:
455          */
456 #define GET_INODE_DATABLOCK(x) \
457         ufs_inode_getfrag(inode, x, fragment, 1, &err, &phys, &new,\
458                           bh_result->b_page)
459 #define GET_INODE_PTR(x) \
460         ufs_inode_getfrag(inode, x, fragment, uspi->s_fpb, &err, NULL, NULL,\
461                           bh_result->b_page)
462 #define GET_INDIRECT_DATABLOCK(x) \
463         ufs_inode_getblock(inode, bh, x, fragment,      \
464                           &err, &phys, &new, bh_result->b_page)
465 #define GET_INDIRECT_PTR(x) \
466         ufs_inode_getblock(inode, bh, x, fragment,      \
467                           &err, NULL, NULL, NULL)
468
469         if (ptr < UFS_NDIR_FRAGMENT) {
470                 bh = GET_INODE_DATABLOCK(ptr);
471                 goto out;
472         }
473         ptr -= UFS_NDIR_FRAGMENT;
474         if (ptr < (1 << (uspi->s_apbshift + uspi->s_fpbshift))) {
475                 bh = GET_INODE_PTR(UFS_IND_FRAGMENT + (ptr >> uspi->s_apbshift));
476                 goto get_indirect;
477         }
478         ptr -= 1 << (uspi->s_apbshift + uspi->s_fpbshift);
479         if (ptr < (1 << (uspi->s_2apbshift + uspi->s_fpbshift))) {
480                 bh = GET_INODE_PTR(UFS_DIND_FRAGMENT + (ptr >> uspi->s_2apbshift));
481                 goto get_double;
482         }
483         ptr -= 1 << (uspi->s_2apbshift + uspi->s_fpbshift);
484         bh = GET_INODE_PTR(UFS_TIND_FRAGMENT + (ptr >> uspi->s_3apbshift));
485         bh = GET_INDIRECT_PTR((ptr >> uspi->s_2apbshift) & uspi->s_apbmask);
486 get_double:
487         bh = GET_INDIRECT_PTR((ptr >> uspi->s_apbshift) & uspi->s_apbmask);
488 get_indirect:
489         bh = GET_INDIRECT_DATABLOCK(ptr & uspi->s_apbmask);
490
491 #undef GET_INODE_DATABLOCK
492 #undef GET_INODE_PTR
493 #undef GET_INDIRECT_DATABLOCK
494 #undef GET_INDIRECT_PTR
495
496 out:
497         if (err)
498                 goto abort;
499         if (new)
500                 set_buffer_new(bh_result);
501         map_bh(bh_result, sb, phys);
502 abort:
503         unlock_kernel();
504         return err;
505
506 abort_negative:
507         ufs_warning(sb, "ufs_get_block", "block < 0");
508         goto abort;
509
510 abort_too_big:
511         ufs_warning(sb, "ufs_get_block", "block > big");
512         goto abort;
513 }
514
515 static struct buffer_head *ufs_getfrag(struct inode *inode,
516                                        unsigned int fragment,
517                                        int create, int *err)
518 {
519         struct buffer_head dummy;
520         int error;
521
522         dummy.b_state = 0;
523         dummy.b_blocknr = -1000;
524         error = ufs_getfrag_block(inode, fragment, &dummy, create);
525         *err = error;
526         if (!error && buffer_mapped(&dummy)) {
527                 struct buffer_head *bh;
528                 bh = sb_getblk(inode->i_sb, dummy.b_blocknr);
529                 if (buffer_new(&dummy)) {
530                         memset(bh->b_data, 0, inode->i_sb->s_blocksize);
531                         set_buffer_uptodate(bh);
532                         mark_buffer_dirty(bh);
533                 }
534                 return bh;
535         }
536         return NULL;
537 }
538
539 struct buffer_head * ufs_bread (struct inode * inode, unsigned fragment,
540         int create, int * err)
541 {
542         struct buffer_head * bh;
543
544         UFSD("ENTER, ino %lu, fragment %u\n", inode->i_ino, fragment);
545         bh = ufs_getfrag (inode, fragment, create, err);
546         if (!bh || buffer_uptodate(bh))                 
547                 return bh;
548         ll_rw_block (READ, 1, &bh);
549         wait_on_buffer (bh);
550         if (buffer_uptodate(bh))
551                 return bh;
552         brelse (bh);
553         *err = -EIO;
554         return NULL;
555 }
556
557 static int ufs_writepage(struct page *page, struct writeback_control *wbc)
558 {
559         return block_write_full_page(page,ufs_getfrag_block,wbc);
560 }
561
562 static int ufs_readpage(struct file *file, struct page *page)
563 {
564         return block_read_full_page(page,ufs_getfrag_block);
565 }
566
567 int __ufs_write_begin(struct file *file, struct address_space *mapping,
568                         loff_t pos, unsigned len, unsigned flags,
569                         struct page **pagep, void **fsdata)
570 {
571         return block_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
572                                 ufs_getfrag_block);
573 }
574
575 static int ufs_write_begin(struct file *file, struct address_space *mapping,
576                         loff_t pos, unsigned len, unsigned flags,
577                         struct page **pagep, void **fsdata)
578 {
579         *pagep = NULL;
580         return __ufs_write_begin(file, mapping, pos, len, flags, pagep, fsdata);
581 }
582
583 static sector_t ufs_bmap(struct address_space *mapping, sector_t block)
584 {
585         return generic_block_bmap(mapping,block,ufs_getfrag_block);
586 }
587
588 const struct address_space_operations ufs_aops = {
589         .readpage = ufs_readpage,
590         .writepage = ufs_writepage,
591         .sync_page = block_sync_page,
592         .write_begin = ufs_write_begin,
593         .write_end = generic_write_end,
594         .bmap = ufs_bmap
595 };
596
597 static void ufs_set_inode_ops(struct inode *inode)
598 {
599         if (S_ISREG(inode->i_mode)) {
600                 inode->i_op = &ufs_file_inode_operations;
601                 inode->i_fop = &ufs_file_operations;
602                 inode->i_mapping->a_ops = &ufs_aops;
603         } else if (S_ISDIR(inode->i_mode)) {
604                 inode->i_op = &ufs_dir_inode_operations;
605                 inode->i_fop = &ufs_dir_operations;
606                 inode->i_mapping->a_ops = &ufs_aops;
607         } else if (S_ISLNK(inode->i_mode)) {
608                 if (!inode->i_blocks)
609                         inode->i_op = &ufs_fast_symlink_inode_operations;
610                 else {
611                         inode->i_op = &page_symlink_inode_operations;
612                         inode->i_mapping->a_ops = &ufs_aops;
613                 }
614         } else
615                 init_special_inode(inode, inode->i_mode,
616                                    ufs_get_inode_dev(inode->i_sb, UFS_I(inode)));
617 }
618
619 static int ufs1_read_inode(struct inode *inode, struct ufs_inode *ufs_inode)
620 {
621         struct ufs_inode_info *ufsi = UFS_I(inode);
622         struct super_block *sb = inode->i_sb;
623         mode_t mode;
624         unsigned i;
625
626         /*
627          * Copy data to the in-core inode.
628          */
629         inode->i_mode = mode = fs16_to_cpu(sb, ufs_inode->ui_mode);
630         inode->i_nlink = fs16_to_cpu(sb, ufs_inode->ui_nlink);
631         if (inode->i_nlink == 0) {
632                 ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino);
633                 return -1;
634         }
635         
636         /*
637          * Linux now has 32-bit uid and gid, so we can support EFT.
638          */
639         inode->i_uid = ufs_get_inode_uid(sb, ufs_inode);
640         inode->i_gid = ufs_get_inode_gid(sb, ufs_inode);
641
642         inode->i_size = fs64_to_cpu(sb, ufs_inode->ui_size);
643         inode->i_atime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_atime.tv_sec);
644         inode->i_ctime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_ctime.tv_sec);
645         inode->i_mtime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_mtime.tv_sec);
646         inode->i_mtime.tv_nsec = 0;
647         inode->i_atime.tv_nsec = 0;
648         inode->i_ctime.tv_nsec = 0;
649         inode->i_blocks = fs32_to_cpu(sb, ufs_inode->ui_blocks);
650         inode->i_generation = fs32_to_cpu(sb, ufs_inode->ui_gen);
651         ufsi->i_flags = fs32_to_cpu(sb, ufs_inode->ui_flags);
652         ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow);
653         ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag);
654
655         
656         if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) {
657                 for (i = 0; i < (UFS_NDADDR + UFS_NINDIR); i++)
658                         ufsi->i_u1.i_data[i] = ufs_inode->ui_u2.ui_addr.ui_db[i];
659         } else {
660                 for (i = 0; i < (UFS_NDADDR + UFS_NINDIR) * 4; i++)
661                         ufsi->i_u1.i_symlink[i] = ufs_inode->ui_u2.ui_symlink[i];
662         }
663         return 0;
664 }
665
666 static int ufs2_read_inode(struct inode *inode, struct ufs2_inode *ufs2_inode)
667 {
668         struct ufs_inode_info *ufsi = UFS_I(inode);
669         struct super_block *sb = inode->i_sb;
670         mode_t mode;
671         unsigned i;
672
673         UFSD("Reading ufs2 inode, ino %lu\n", inode->i_ino);
674         /*
675          * Copy data to the in-core inode.
676          */
677         inode->i_mode = mode = fs16_to_cpu(sb, ufs2_inode->ui_mode);
678         inode->i_nlink = fs16_to_cpu(sb, ufs2_inode->ui_nlink);
679         if (inode->i_nlink == 0) {
680                 ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino);
681                 return -1;
682         }
683
684         /*
685          * Linux now has 32-bit uid and gid, so we can support EFT.
686          */
687         inode->i_uid = fs32_to_cpu(sb, ufs2_inode->ui_uid);
688         inode->i_gid = fs32_to_cpu(sb, ufs2_inode->ui_gid);
689
690         inode->i_size = fs64_to_cpu(sb, ufs2_inode->ui_size);
691         inode->i_atime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_atime);
692         inode->i_ctime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_ctime);
693         inode->i_mtime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_mtime);
694         inode->i_atime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_atimensec);
695         inode->i_ctime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_ctimensec);
696         inode->i_mtime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_mtimensec);
697         inode->i_blocks = fs64_to_cpu(sb, ufs2_inode->ui_blocks);
698         inode->i_generation = fs32_to_cpu(sb, ufs2_inode->ui_gen);
699         ufsi->i_flags = fs32_to_cpu(sb, ufs2_inode->ui_flags);
700         /*
701         ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow);
702         ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag);
703         */
704
705         if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) {
706                 for (i = 0; i < (UFS_NDADDR + UFS_NINDIR); i++)
707                         ufsi->i_u1.u2_i_data[i] =
708                                 ufs2_inode->ui_u2.ui_addr.ui_db[i];
709         } else {
710                 for (i = 0; i < (UFS_NDADDR + UFS_NINDIR) * 4; i++)
711                         ufsi->i_u1.i_symlink[i] = ufs2_inode->ui_u2.ui_symlink[i];
712         }
713         return 0;
714 }
715
716 void ufs_read_inode(struct inode * inode)
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         int err;
723
724         UFSD("ENTER, ino %lu\n", inode->i_ino);
725
726         sb = inode->i_sb;
727         uspi = UFS_SB(sb)->s_uspi;
728
729         if (inode->i_ino < UFS_ROOTINO ||
730             inode->i_ino > (uspi->s_ncg * uspi->s_ipg)) {
731                 ufs_warning(sb, "ufs_read_inode", "bad inode number (%lu)\n",
732                             inode->i_ino);
733                 goto bad_inode;
734         }
735
736         bh = sb_bread(sb, uspi->s_sbbase + ufs_inotofsba(inode->i_ino));
737         if (!bh) {
738                 ufs_warning(sb, "ufs_read_inode", "unable to read inode %lu\n",
739                             inode->i_ino);
740                 goto bad_inode;
741         }
742         if ((UFS_SB(sb)->s_flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
743                 struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data;
744
745                 err = ufs2_read_inode(inode,
746                                       ufs2_inode + ufs_inotofsbo(inode->i_ino));
747         } else {
748                 struct ufs_inode *ufs_inode = (struct ufs_inode *)bh->b_data;
749
750                 err = ufs1_read_inode(inode,
751                                       ufs_inode + ufs_inotofsbo(inode->i_ino));
752         }
753
754         if (err)
755                 goto bad_inode;
756         inode->i_version++;
757         ufsi->i_lastfrag =
758                 (inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift;
759         ufsi->i_dir_start_lookup = 0;
760         ufsi->i_osync = 0;
761
762         ufs_set_inode_ops(inode);
763
764         brelse(bh);
765
766         UFSD("EXIT\n");
767         return;
768
769 bad_inode:
770         make_bad_inode(inode);
771 }
772
773 static void ufs1_update_inode(struct inode *inode, struct ufs_inode *ufs_inode)
774 {
775         struct super_block *sb = inode->i_sb;
776         struct ufs_inode_info *ufsi = UFS_I(inode);
777         unsigned i;
778
779         ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode);
780         ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink);
781
782         ufs_set_inode_uid(sb, ufs_inode, inode->i_uid);
783         ufs_set_inode_gid(sb, ufs_inode, inode->i_gid);
784                 
785         ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size);
786         ufs_inode->ui_atime.tv_sec = cpu_to_fs32(sb, inode->i_atime.tv_sec);
787         ufs_inode->ui_atime.tv_usec = 0;
788         ufs_inode->ui_ctime.tv_sec = cpu_to_fs32(sb, inode->i_ctime.tv_sec);
789         ufs_inode->ui_ctime.tv_usec = 0;
790         ufs_inode->ui_mtime.tv_sec = cpu_to_fs32(sb, inode->i_mtime.tv_sec);
791         ufs_inode->ui_mtime.tv_usec = 0;
792         ufs_inode->ui_blocks = cpu_to_fs32(sb, inode->i_blocks);
793         ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags);
794         ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation);
795
796         if ((UFS_SB(sb)->s_flags & UFS_UID_MASK) == UFS_UID_EFT) {
797                 ufs_inode->ui_u3.ui_sun.ui_shadow = cpu_to_fs32(sb, ufsi->i_shadow);
798                 ufs_inode->ui_u3.ui_sun.ui_oeftflag = cpu_to_fs32(sb, ufsi->i_oeftflag);
799         }
800
801         if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
802                 /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */
803                 ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.i_data[0];
804         } else if (inode->i_blocks) {
805                 for (i = 0; i < (UFS_NDADDR + UFS_NINDIR); i++)
806                         ufs_inode->ui_u2.ui_addr.ui_db[i] = ufsi->i_u1.i_data[i];
807         }
808         else {
809                 for (i = 0; i < (UFS_NDADDR + UFS_NINDIR) * 4; i++)
810                         ufs_inode->ui_u2.ui_symlink[i] = ufsi->i_u1.i_symlink[i];
811         }
812
813         if (!inode->i_nlink)
814                 memset (ufs_inode, 0, sizeof(struct ufs_inode));
815 }
816
817 static void ufs2_update_inode(struct inode *inode, struct ufs2_inode *ufs_inode)
818 {
819         struct super_block *sb = inode->i_sb;
820         struct ufs_inode_info *ufsi = UFS_I(inode);
821         unsigned i;
822
823         UFSD("ENTER\n");
824         ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode);
825         ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink);
826
827         ufs_inode->ui_uid = cpu_to_fs32(sb, inode->i_uid);
828         ufs_inode->ui_gid = cpu_to_fs32(sb, inode->i_gid);
829
830         ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size);
831         ufs_inode->ui_atime = cpu_to_fs64(sb, inode->i_atime.tv_sec);
832         ufs_inode->ui_atimensec = cpu_to_fs32(sb, inode->i_atime.tv_nsec);
833         ufs_inode->ui_ctime = cpu_to_fs64(sb, inode->i_ctime.tv_sec);
834         ufs_inode->ui_ctimensec = cpu_to_fs32(sb, inode->i_ctime.tv_nsec);
835         ufs_inode->ui_mtime = cpu_to_fs64(sb, inode->i_mtime.tv_sec);
836         ufs_inode->ui_mtimensec = cpu_to_fs32(sb, inode->i_mtime.tv_nsec);
837
838         ufs_inode->ui_blocks = cpu_to_fs64(sb, inode->i_blocks);
839         ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags);
840         ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation);
841
842         if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
843                 /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */
844                 ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.u2_i_data[0];
845         } else if (inode->i_blocks) {
846                 for (i = 0; i < (UFS_NDADDR + UFS_NINDIR); i++)
847                         ufs_inode->ui_u2.ui_addr.ui_db[i] = ufsi->i_u1.u2_i_data[i];
848         } else {
849                 for (i = 0; i < (UFS_NDADDR + UFS_NINDIR) * 4; i++)
850                         ufs_inode->ui_u2.ui_symlink[i] = ufsi->i_u1.i_symlink[i];
851         }
852
853         if (!inode->i_nlink)
854                 memset (ufs_inode, 0, sizeof(struct ufs2_inode));
855         UFSD("EXIT\n");
856 }
857
858 static int ufs_update_inode(struct inode * inode, int do_sync)
859 {
860         struct super_block *sb = inode->i_sb;
861         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
862         struct buffer_head * bh;
863
864         UFSD("ENTER, ino %lu\n", inode->i_ino);
865
866         if (inode->i_ino < UFS_ROOTINO ||
867             inode->i_ino > (uspi->s_ncg * uspi->s_ipg)) {
868                 ufs_warning (sb, "ufs_read_inode", "bad inode number (%lu)\n", inode->i_ino);
869                 return -1;
870         }
871
872         bh = sb_bread(sb, ufs_inotofsba(inode->i_ino));
873         if (!bh) {
874                 ufs_warning (sb, "ufs_read_inode", "unable to read inode %lu\n", inode->i_ino);
875                 return -1;
876         }
877         if (uspi->fs_magic == UFS2_MAGIC) {
878                 struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data;
879
880                 ufs2_update_inode(inode,
881                                   ufs2_inode + ufs_inotofsbo(inode->i_ino));
882         } else {
883                 struct ufs_inode *ufs_inode = (struct ufs_inode *) bh->b_data;
884
885                 ufs1_update_inode(inode, ufs_inode + ufs_inotofsbo(inode->i_ino));
886         }
887                 
888         mark_buffer_dirty(bh);
889         if (do_sync)
890                 sync_dirty_buffer(bh);
891         brelse (bh);
892         
893         UFSD("EXIT\n");
894         return 0;
895 }
896
897 int ufs_write_inode (struct inode * inode, int wait)
898 {
899         int ret;
900         lock_kernel();
901         ret = ufs_update_inode (inode, wait);
902         unlock_kernel();
903         return ret;
904 }
905
906 int ufs_sync_inode (struct inode *inode)
907 {
908         return ufs_update_inode (inode, 1);
909 }
910
911 void ufs_delete_inode (struct inode * inode)
912 {
913         loff_t old_i_size;
914
915         truncate_inode_pages(&inode->i_data, 0);
916         if (is_bad_inode(inode))
917                 goto no_delete;
918         /*UFS_I(inode)->i_dtime = CURRENT_TIME;*/
919         lock_kernel();
920         mark_inode_dirty(inode);
921         ufs_update_inode(inode, IS_SYNC(inode));
922         old_i_size = inode->i_size;
923         inode->i_size = 0;
924         if (inode->i_blocks && ufs_truncate(inode, old_i_size))
925                 ufs_warning(inode->i_sb, __FUNCTION__, "ufs_truncate failed\n");
926         ufs_free_inode (inode);
927         unlock_kernel();
928         return;
929 no_delete:
930         clear_inode(inode);     /* We must guarantee clearing of inode... */
931 }