switch ufs directories to ufs_sync_file()
[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/time.h>
34 #include <linux/stat.h>
35 #include <linux/string.h>
36 #include <linux/mm.h>
37 #include <linux/smp_lock.h>
38 #include <linux/buffer_head.h>
39
40 #include "ufs_fs.h"
41 #include "ufs.h"
42 #include "swab.h"
43 #include "util.h"
44
45 static u64 ufs_frag_map(struct inode *inode, sector_t frag);
46
47 static int ufs_block_to_path(struct inode *inode, sector_t i_block, sector_t offsets[4])
48 {
49         struct ufs_sb_private_info *uspi = UFS_SB(inode->i_sb)->s_uspi;
50         int ptrs = uspi->s_apb;
51         int ptrs_bits = uspi->s_apbshift;
52         const long direct_blocks = UFS_NDADDR,
53                 indirect_blocks = ptrs,
54                 double_blocks = (1 << (ptrs_bits * 2));
55         int n = 0;
56
57
58         UFSD("ptrs=uspi->s_apb = %d,double_blocks=%ld \n",ptrs,double_blocks);
59         if (i_block < 0) {
60                 ufs_warning(inode->i_sb, "ufs_block_to_path", "block < 0");
61         } else if (i_block < direct_blocks) {
62                 offsets[n++] = i_block;
63         } else if ((i_block -= direct_blocks) < indirect_blocks) {
64                 offsets[n++] = UFS_IND_BLOCK;
65                 offsets[n++] = i_block;
66         } else if ((i_block -= indirect_blocks) < double_blocks) {
67                 offsets[n++] = UFS_DIND_BLOCK;
68                 offsets[n++] = i_block >> ptrs_bits;
69                 offsets[n++] = i_block & (ptrs - 1);
70         } else if (((i_block -= double_blocks) >> (ptrs_bits * 2)) < ptrs) {
71                 offsets[n++] = UFS_TIND_BLOCK;
72                 offsets[n++] = i_block >> (ptrs_bits * 2);
73                 offsets[n++] = (i_block >> ptrs_bits) & (ptrs - 1);
74                 offsets[n++] = i_block & (ptrs - 1);
75         } else {
76                 ufs_warning(inode->i_sb, "ufs_block_to_path", "block > big");
77         }
78         return n;
79 }
80
81 /*
82  * Returns the location of the fragment from
83  * the begining of the filesystem.
84  */
85
86 static u64 ufs_frag_map(struct inode *inode, sector_t frag)
87 {
88         struct ufs_inode_info *ufsi = UFS_I(inode);
89         struct super_block *sb = inode->i_sb;
90         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
91         u64 mask = (u64) uspi->s_apbmask>>uspi->s_fpbshift;
92         int shift = uspi->s_apbshift-uspi->s_fpbshift;
93         sector_t offsets[4], *p;
94         int depth = ufs_block_to_path(inode, frag >> uspi->s_fpbshift, offsets);
95         u64  ret = 0L;
96         __fs32 block;
97         __fs64 u2_block = 0L;
98         unsigned flags = UFS_SB(sb)->s_flags;
99         u64 temp = 0L;
100
101         UFSD(": frag = %llu  depth = %d\n", (unsigned long long)frag, depth);
102         UFSD(": uspi->s_fpbshift = %d ,uspi->s_apbmask = %x, mask=%llx\n",
103                 uspi->s_fpbshift, uspi->s_apbmask,
104                 (unsigned long long)mask);
105
106         if (depth == 0)
107                 return 0;
108
109         p = offsets;
110
111         lock_kernel();
112         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
113                 goto ufs2;
114
115         block = ufsi->i_u1.i_data[*p++];
116         if (!block)
117                 goto out;
118         while (--depth) {
119                 struct buffer_head *bh;
120                 sector_t n = *p++;
121
122                 bh = sb_bread(sb, uspi->s_sbbase + fs32_to_cpu(sb, block)+(n>>shift));
123                 if (!bh)
124                         goto out;
125                 block = ((__fs32 *) bh->b_data)[n & mask];
126                 brelse (bh);
127                 if (!block)
128                         goto out;
129         }
130         ret = (u64) (uspi->s_sbbase + fs32_to_cpu(sb, block) + (frag & uspi->s_fpbmask));
131         goto out;
132 ufs2:
133         u2_block = ufsi->i_u1.u2_i_data[*p++];
134         if (!u2_block)
135                 goto out;
136
137
138         while (--depth) {
139                 struct buffer_head *bh;
140                 sector_t n = *p++;
141
142
143                 temp = (u64)(uspi->s_sbbase) + fs64_to_cpu(sb, u2_block);
144                 bh = sb_bread(sb, temp +(u64) (n>>shift));
145                 if (!bh)
146                         goto out;
147                 u2_block = ((__fs64 *)bh->b_data)[n & mask];
148                 brelse(bh);
149                 if (!u2_block)
150                         goto out;
151         }
152         temp = (u64)uspi->s_sbbase + fs64_to_cpu(sb, u2_block);
153         ret = temp + (u64) (frag & uspi->s_fpbmask);
154
155 out:
156         unlock_kernel();
157         return ret;
158 }
159
160 /**
161  * ufs_inode_getfrag() - allocate new fragment(s)
162  * @inode - pointer to inode
163  * @fragment - number of `fragment' which hold pointer
164  *   to new allocated fragment(s)
165  * @new_fragment - number of new allocated fragment(s)
166  * @required - how many fragment(s) we require
167  * @err - we set it if something wrong
168  * @phys - pointer to where we save physical number of new allocated fragments,
169  *   NULL if we allocate not data(indirect blocks for example).
170  * @new - we set it if we allocate new block
171  * @locked_page - for ufs_new_fragments()
172  */
173 static struct buffer_head *
174 ufs_inode_getfrag(struct inode *inode, u64 fragment,
175                   sector_t new_fragment, unsigned int required, int *err,
176                   long *phys, int *new, struct page *locked_page)
177 {
178         struct ufs_inode_info *ufsi = UFS_I(inode);
179         struct super_block *sb = inode->i_sb;
180         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
181         struct buffer_head * result;
182         unsigned blockoff, lastblockoff;
183         u64 tmp, goal, lastfrag, block, lastblock;
184         void *p, *p2;
185
186         UFSD("ENTER, ino %lu, fragment %llu, new_fragment %llu, required %u, "
187              "metadata %d\n", inode->i_ino, (unsigned long long)fragment,
188              (unsigned long long)new_fragment, required, !phys);
189
190         /* TODO : to be done for write support
191         if ( (flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
192              goto ufs2;
193          */
194
195         block = ufs_fragstoblks (fragment);
196         blockoff = ufs_fragnum (fragment);
197         p = ufs_get_direct_data_ptr(uspi, ufsi, block);
198
199         goal = 0;
200
201 repeat:
202         tmp = ufs_data_ptr_to_cpu(sb, p);
203
204         lastfrag = ufsi->i_lastfrag;
205         if (tmp && fragment < lastfrag) {
206                 if (!phys) {
207                         result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff);
208                         if (tmp == ufs_data_ptr_to_cpu(sb, p)) {
209                                 UFSD("EXIT, result %llu\n",
210                                      (unsigned long long)tmp + blockoff);
211                                 return result;
212                         }
213                         brelse (result);
214                         goto repeat;
215                 } else {
216                         *phys = uspi->s_sbbase + tmp + blockoff;
217                         return NULL;
218                 }
219         }
220
221         lastblock = ufs_fragstoblks (lastfrag);
222         lastblockoff = ufs_fragnum (lastfrag);
223         /*
224          * We will extend file into new block beyond last allocated block
225          */
226         if (lastblock < block) {
227                 /*
228                  * We must reallocate last allocated block
229                  */
230                 if (lastblockoff) {
231                         p2 = ufs_get_direct_data_ptr(uspi, ufsi, lastblock);
232                         tmp = ufs_new_fragments(inode, p2, lastfrag,
233                                                 ufs_data_ptr_to_cpu(sb, p2),
234                                                 uspi->s_fpb - lastblockoff,
235                                                 err, locked_page);
236                         if (!tmp) {
237                                 if (lastfrag != ufsi->i_lastfrag)
238                                         goto repeat;
239                                 else
240                                         return NULL;
241                         }
242                         lastfrag = ufsi->i_lastfrag;
243                         
244                 }
245                 tmp = ufs_data_ptr_to_cpu(sb,
246                                          ufs_get_direct_data_ptr(uspi, ufsi,
247                                                                  lastblock));
248                 if (tmp)
249                         goal = tmp + uspi->s_fpb;
250                 tmp = ufs_new_fragments (inode, p, fragment - blockoff, 
251                                          goal, required + blockoff,
252                                          err,
253                                          phys != NULL ? locked_page : NULL);
254         } else if (lastblock == block) {
255         /*
256          * We will extend last allocated block
257          */
258                 tmp = ufs_new_fragments(inode, p, fragment -
259                                         (blockoff - lastblockoff),
260                                         ufs_data_ptr_to_cpu(sb, p),
261                                         required +  (blockoff - lastblockoff),
262                                         err, phys != NULL ? locked_page : NULL);
263         } else /* (lastblock > block) */ {
264         /*
265          * We will allocate new block before last allocated block
266          */
267                 if (block) {
268                         tmp = ufs_data_ptr_to_cpu(sb,
269                                                  ufs_get_direct_data_ptr(uspi, ufsi, block - 1));
270                         if (tmp)
271                                 goal = tmp + uspi->s_fpb;
272                 }
273                 tmp = ufs_new_fragments(inode, p, fragment - blockoff,
274                                         goal, uspi->s_fpb, err,
275                                         phys != NULL ? locked_page : NULL);
276         }
277         if (!tmp) {
278                 if ((!blockoff && ufs_data_ptr_to_cpu(sb, p)) ||
279                     (blockoff && lastfrag != ufsi->i_lastfrag))
280                         goto repeat;
281                 *err = -ENOSPC;
282                 return NULL;
283         }
284
285         if (!phys) {
286                 result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff);
287         } else {
288                 *phys = uspi->s_sbbase + tmp + blockoff;
289                 result = NULL;
290                 *err = 0;
291                 *new = 1;
292         }
293
294         inode->i_ctime = CURRENT_TIME_SEC;
295         if (IS_SYNC(inode))
296                 ufs_sync_inode (inode);
297         mark_inode_dirty(inode);
298         UFSD("EXIT, result %llu\n", (unsigned long long)tmp + blockoff);
299         return result;
300
301      /* This part : To be implemented ....
302         Required only for writing, not required for READ-ONLY.
303 ufs2:
304
305         u2_block = ufs_fragstoblks(fragment);
306         u2_blockoff = ufs_fragnum(fragment);
307         p = ufsi->i_u1.u2_i_data + block;
308         goal = 0;
309
310 repeat2:
311         tmp = fs32_to_cpu(sb, *p);
312         lastfrag = ufsi->i_lastfrag;
313
314      */
315 }
316
317 /**
318  * ufs_inode_getblock() - allocate new block
319  * @inode - pointer to inode
320  * @bh - pointer to block which hold "pointer" to new allocated block
321  * @fragment - number of `fragment' which hold pointer
322  *   to new allocated block
323  * @new_fragment - number of new allocated fragment
324  *  (block will hold this fragment and also uspi->s_fpb-1)
325  * @err - see ufs_inode_getfrag()
326  * @phys - see ufs_inode_getfrag()
327  * @new - see ufs_inode_getfrag()
328  * @locked_page - see ufs_inode_getfrag()
329  */
330 static struct buffer_head *
331 ufs_inode_getblock(struct inode *inode, struct buffer_head *bh,
332                   u64 fragment, sector_t new_fragment, int *err,
333                   long *phys, int *new, struct page *locked_page)
334 {
335         struct super_block *sb = inode->i_sb;
336         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
337         struct buffer_head * result;
338         unsigned blockoff;
339         u64 tmp, goal, block;
340         void *p;
341
342         block = ufs_fragstoblks (fragment);
343         blockoff = ufs_fragnum (fragment);
344
345         UFSD("ENTER, ino %lu, fragment %llu, new_fragment %llu, metadata %d\n",
346              inode->i_ino, (unsigned long long)fragment,
347              (unsigned long long)new_fragment, !phys);
348
349         result = NULL;
350         if (!bh)
351                 goto out;
352         if (!buffer_uptodate(bh)) {
353                 ll_rw_block (READ, 1, &bh);
354                 wait_on_buffer (bh);
355                 if (!buffer_uptodate(bh))
356                         goto out;
357         }
358         if (uspi->fs_magic == UFS2_MAGIC)
359                 p = (__fs64 *)bh->b_data + block;
360         else
361                 p = (__fs32 *)bh->b_data + block;
362 repeat:
363         tmp = ufs_data_ptr_to_cpu(sb, p);
364         if (tmp) {
365                 if (!phys) {
366                         result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff);
367                         if (tmp == ufs_data_ptr_to_cpu(sb, p))
368                                 goto out;
369                         brelse (result);
370                         goto repeat;
371                 } else {
372                         *phys = uspi->s_sbbase + tmp + blockoff;
373                         goto out;
374                 }
375         }
376
377         if (block && (uspi->fs_magic == UFS2_MAGIC ?
378                       (tmp = fs64_to_cpu(sb, ((__fs64 *)bh->b_data)[block-1])) :
379                       (tmp = fs32_to_cpu(sb, ((__fs32 *)bh->b_data)[block-1]))))
380                 goal = tmp + uspi->s_fpb;
381         else
382                 goal = bh->b_blocknr + uspi->s_fpb;
383         tmp = ufs_new_fragments(inode, p, ufs_blknum(new_fragment), goal,
384                                 uspi->s_fpb, err, locked_page);
385         if (!tmp) {
386                 if (ufs_data_ptr_to_cpu(sb, p))
387                         goto repeat;
388                 goto out;
389         }               
390
391
392         if (!phys) {
393                 result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff);
394         } else {
395                 *phys = uspi->s_sbbase + tmp + blockoff;
396                 *new = 1;
397         }
398
399         mark_buffer_dirty(bh);
400         if (IS_SYNC(inode))
401                 sync_dirty_buffer(bh);
402         inode->i_ctime = CURRENT_TIME_SEC;
403         mark_inode_dirty(inode);
404         UFSD("result %llu\n", (unsigned long long)tmp + blockoff);
405 out:
406         brelse (bh);
407         UFSD("EXIT\n");
408         return result;
409 }
410
411 /**
412  * ufs_getfrag_bloc() - `get_block_t' function, interface between UFS and
413  * readpage, writepage and so on
414  */
415
416 int ufs_getfrag_block(struct inode *inode, sector_t fragment, struct buffer_head *bh_result, int create)
417 {
418         struct super_block * sb = inode->i_sb;
419         struct ufs_sb_private_info * uspi = UFS_SB(sb)->s_uspi;
420         struct buffer_head * bh;
421         int ret, err, new;
422         unsigned long ptr,phys;
423         u64 phys64 = 0;
424         
425         if (!create) {
426                 phys64 = ufs_frag_map(inode, fragment);
427                 UFSD("phys64 = %llu\n", (unsigned long long)phys64);
428                 if (phys64)
429                         map_bh(bh_result, sb, phys64);
430                 return 0;
431         }
432
433         /* This code entered only while writing ....? */
434
435         err = -EIO;
436         new = 0;
437         ret = 0;
438         bh = NULL;
439
440         lock_kernel();
441
442         UFSD("ENTER, ino %lu, fragment %llu\n", inode->i_ino, (unsigned long long)fragment);
443         if (fragment < 0)
444                 goto abort_negative;
445         if (fragment >
446             ((UFS_NDADDR + uspi->s_apb + uspi->s_2apb + uspi->s_3apb)
447              << uspi->s_fpbshift))
448                 goto abort_too_big;
449
450         err = 0;
451         ptr = fragment;
452           
453         /*
454          * ok, these macros clean the logic up a bit and make
455          * it much more readable:
456          */
457 #define GET_INODE_DATABLOCK(x) \
458         ufs_inode_getfrag(inode, x, fragment, 1, &err, &phys, &new,\
459                           bh_result->b_page)
460 #define GET_INODE_PTR(x) \
461         ufs_inode_getfrag(inode, x, fragment, uspi->s_fpb, &err, NULL, NULL,\
462                           bh_result->b_page)
463 #define GET_INDIRECT_DATABLOCK(x) \
464         ufs_inode_getblock(inode, bh, x, fragment,      \
465                           &err, &phys, &new, bh_result->b_page)
466 #define GET_INDIRECT_PTR(x) \
467         ufs_inode_getblock(inode, bh, x, fragment,      \
468                           &err, NULL, NULL, NULL)
469
470         if (ptr < UFS_NDIR_FRAGMENT) {
471                 bh = GET_INODE_DATABLOCK(ptr);
472                 goto out;
473         }
474         ptr -= UFS_NDIR_FRAGMENT;
475         if (ptr < (1 << (uspi->s_apbshift + uspi->s_fpbshift))) {
476                 bh = GET_INODE_PTR(UFS_IND_FRAGMENT + (ptr >> uspi->s_apbshift));
477                 goto get_indirect;
478         }
479         ptr -= 1 << (uspi->s_apbshift + uspi->s_fpbshift);
480         if (ptr < (1 << (uspi->s_2apbshift + uspi->s_fpbshift))) {
481                 bh = GET_INODE_PTR(UFS_DIND_FRAGMENT + (ptr >> uspi->s_2apbshift));
482                 goto get_double;
483         }
484         ptr -= 1 << (uspi->s_2apbshift + uspi->s_fpbshift);
485         bh = GET_INODE_PTR(UFS_TIND_FRAGMENT + (ptr >> uspi->s_3apbshift));
486         bh = GET_INDIRECT_PTR((ptr >> uspi->s_2apbshift) & uspi->s_apbmask);
487 get_double:
488         bh = GET_INDIRECT_PTR((ptr >> uspi->s_apbshift) & uspi->s_apbmask);
489 get_indirect:
490         bh = GET_INDIRECT_DATABLOCK(ptr & uspi->s_apbmask);
491
492 #undef GET_INODE_DATABLOCK
493 #undef GET_INODE_PTR
494 #undef GET_INDIRECT_DATABLOCK
495 #undef GET_INDIRECT_PTR
496
497 out:
498         if (err)
499                 goto abort;
500         if (new)
501                 set_buffer_new(bh_result);
502         map_bh(bh_result, sb, phys);
503 abort:
504         unlock_kernel();
505         return err;
506
507 abort_negative:
508         ufs_warning(sb, "ufs_get_block", "block < 0");
509         goto abort;
510
511 abort_too_big:
512         ufs_warning(sb, "ufs_get_block", "block > big");
513         goto abort;
514 }
515
516 static struct buffer_head *ufs_getfrag(struct inode *inode,
517                                        unsigned int fragment,
518                                        int create, int *err)
519 {
520         struct buffer_head dummy;
521         int error;
522
523         dummy.b_state = 0;
524         dummy.b_blocknr = -1000;
525         error = ufs_getfrag_block(inode, fragment, &dummy, create);
526         *err = error;
527         if (!error && buffer_mapped(&dummy)) {
528                 struct buffer_head *bh;
529                 bh = sb_getblk(inode->i_sb, dummy.b_blocknr);
530                 if (buffer_new(&dummy)) {
531                         memset(bh->b_data, 0, inode->i_sb->s_blocksize);
532                         set_buffer_uptodate(bh);
533                         mark_buffer_dirty(bh);
534                 }
535                 return bh;
536         }
537         return NULL;
538 }
539
540 struct buffer_head * ufs_bread (struct inode * inode, unsigned fragment,
541         int create, int * err)
542 {
543         struct buffer_head * bh;
544
545         UFSD("ENTER, ino %lu, fragment %u\n", inode->i_ino, fragment);
546         bh = ufs_getfrag (inode, fragment, create, err);
547         if (!bh || buffer_uptodate(bh))                 
548                 return bh;
549         ll_rw_block (READ, 1, &bh);
550         wait_on_buffer (bh);
551         if (buffer_uptodate(bh))
552                 return bh;
553         brelse (bh);
554         *err = -EIO;
555         return NULL;
556 }
557
558 static int ufs_writepage(struct page *page, struct writeback_control *wbc)
559 {
560         return block_write_full_page(page,ufs_getfrag_block,wbc);
561 }
562
563 static int ufs_readpage(struct file *file, struct page *page)
564 {
565         return block_read_full_page(page,ufs_getfrag_block);
566 }
567
568 int __ufs_write_begin(struct file *file, struct address_space *mapping,
569                         loff_t pos, unsigned len, unsigned flags,
570                         struct page **pagep, void **fsdata)
571 {
572         return block_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
573                                 ufs_getfrag_block);
574 }
575
576 static int ufs_write_begin(struct file *file, struct address_space *mapping,
577                         loff_t pos, unsigned len, unsigned flags,
578                         struct page **pagep, void **fsdata)
579 {
580         *pagep = NULL;
581         return __ufs_write_begin(file, mapping, pos, len, flags, pagep, fsdata);
582 }
583
584 static sector_t ufs_bmap(struct address_space *mapping, sector_t block)
585 {
586         return generic_block_bmap(mapping,block,ufs_getfrag_block);
587 }
588
589 const struct address_space_operations ufs_aops = {
590         .readpage = ufs_readpage,
591         .writepage = ufs_writepage,
592         .sync_page = block_sync_page,
593         .write_begin = ufs_write_begin,
594         .write_end = generic_write_end,
595         .bmap = ufs_bmap
596 };
597
598 static void ufs_set_inode_ops(struct inode *inode)
599 {
600         if (S_ISREG(inode->i_mode)) {
601                 inode->i_op = &ufs_file_inode_operations;
602                 inode->i_fop = &ufs_file_operations;
603                 inode->i_mapping->a_ops = &ufs_aops;
604         } else if (S_ISDIR(inode->i_mode)) {
605                 inode->i_op = &ufs_dir_inode_operations;
606                 inode->i_fop = &ufs_dir_operations;
607                 inode->i_mapping->a_ops = &ufs_aops;
608         } else if (S_ISLNK(inode->i_mode)) {
609                 if (!inode->i_blocks)
610                         inode->i_op = &ufs_fast_symlink_inode_operations;
611                 else {
612                         inode->i_op = &page_symlink_inode_operations;
613                         inode->i_mapping->a_ops = &ufs_aops;
614                 }
615         } else
616                 init_special_inode(inode, inode->i_mode,
617                                    ufs_get_inode_dev(inode->i_sb, UFS_I(inode)));
618 }
619
620 static int ufs1_read_inode(struct inode *inode, struct ufs_inode *ufs_inode)
621 {
622         struct ufs_inode_info *ufsi = UFS_I(inode);
623         struct super_block *sb = inode->i_sb;
624         mode_t mode;
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                 memcpy(ufsi->i_u1.i_data, &ufs_inode->ui_u2.ui_addr,
658                        sizeof(ufs_inode->ui_u2.ui_addr));
659         } else {
660                 memcpy(ufsi->i_u1.i_symlink, ufs_inode->ui_u2.ui_symlink,
661                        sizeof(ufs_inode->ui_u2.ui_symlink) - 1);
662                 ufsi->i_u1.i_symlink[sizeof(ufs_inode->ui_u2.ui_symlink) - 1] = 0;
663         }
664         return 0;
665 }
666
667 static int ufs2_read_inode(struct inode *inode, struct ufs2_inode *ufs2_inode)
668 {
669         struct ufs_inode_info *ufsi = UFS_I(inode);
670         struct super_block *sb = inode->i_sb;
671         mode_t mode;
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                 memcpy(ufsi->i_u1.u2_i_data, &ufs2_inode->ui_u2.ui_addr,
707                        sizeof(ufs2_inode->ui_u2.ui_addr));
708         } else {
709                 memcpy(ufsi->i_u1.i_symlink, ufs2_inode->ui_u2.ui_symlink,
710                        sizeof(ufs2_inode->ui_u2.ui_symlink) - 1);
711                 ufsi->i_u1.i_symlink[sizeof(ufs2_inode->ui_u2.ui_symlink) - 1] = 0;
712         }
713         return 0;
714 }
715
716 struct inode *ufs_iget(struct super_block *sb, unsigned long ino)
717 {
718         struct ufs_inode_info *ufsi;
719         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
720         struct buffer_head * bh;
721         struct inode *inode;
722         int err;
723
724         UFSD("ENTER, ino %lu\n", ino);
725
726         if (ino < UFS_ROOTINO || ino > (uspi->s_ncg * uspi->s_ipg)) {
727                 ufs_warning(sb, "ufs_read_inode", "bad inode number (%lu)\n",
728                             ino);
729                 return ERR_PTR(-EIO);
730         }
731
732         inode = iget_locked(sb, ino);
733         if (!inode)
734                 return ERR_PTR(-ENOMEM);
735         if (!(inode->i_state & I_NEW))
736                 return inode;
737
738         ufsi = UFS_I(inode);
739
740         bh = sb_bread(sb, uspi->s_sbbase + ufs_inotofsba(inode->i_ino));
741         if (!bh) {
742                 ufs_warning(sb, "ufs_read_inode", "unable to read inode %lu\n",
743                             inode->i_ino);
744                 goto bad_inode;
745         }
746         if ((UFS_SB(sb)->s_flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
747                 struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data;
748
749                 err = ufs2_read_inode(inode,
750                                       ufs2_inode + ufs_inotofsbo(inode->i_ino));
751         } else {
752                 struct ufs_inode *ufs_inode = (struct ufs_inode *)bh->b_data;
753
754                 err = ufs1_read_inode(inode,
755                                       ufs_inode + ufs_inotofsbo(inode->i_ino));
756         }
757
758         if (err)
759                 goto bad_inode;
760         inode->i_version++;
761         ufsi->i_lastfrag =
762                 (inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift;
763         ufsi->i_dir_start_lookup = 0;
764         ufsi->i_osync = 0;
765
766         ufs_set_inode_ops(inode);
767
768         brelse(bh);
769
770         UFSD("EXIT\n");
771         unlock_new_inode(inode);
772         return inode;
773
774 bad_inode:
775         iget_failed(inode);
776         return ERR_PTR(-EIO);
777 }
778
779 static void ufs1_update_inode(struct inode *inode, struct ufs_inode *ufs_inode)
780 {
781         struct super_block *sb = inode->i_sb;
782         struct ufs_inode_info *ufsi = UFS_I(inode);
783
784         ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode);
785         ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink);
786
787         ufs_set_inode_uid(sb, ufs_inode, inode->i_uid);
788         ufs_set_inode_gid(sb, ufs_inode, inode->i_gid);
789                 
790         ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size);
791         ufs_inode->ui_atime.tv_sec = cpu_to_fs32(sb, inode->i_atime.tv_sec);
792         ufs_inode->ui_atime.tv_usec = 0;
793         ufs_inode->ui_ctime.tv_sec = cpu_to_fs32(sb, inode->i_ctime.tv_sec);
794         ufs_inode->ui_ctime.tv_usec = 0;
795         ufs_inode->ui_mtime.tv_sec = cpu_to_fs32(sb, inode->i_mtime.tv_sec);
796         ufs_inode->ui_mtime.tv_usec = 0;
797         ufs_inode->ui_blocks = cpu_to_fs32(sb, inode->i_blocks);
798         ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags);
799         ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation);
800
801         if ((UFS_SB(sb)->s_flags & UFS_UID_MASK) == UFS_UID_EFT) {
802                 ufs_inode->ui_u3.ui_sun.ui_shadow = cpu_to_fs32(sb, ufsi->i_shadow);
803                 ufs_inode->ui_u3.ui_sun.ui_oeftflag = cpu_to_fs32(sb, ufsi->i_oeftflag);
804         }
805
806         if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
807                 /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */
808                 ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.i_data[0];
809         } else if (inode->i_blocks) {
810                 memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.i_data,
811                        sizeof(ufs_inode->ui_u2.ui_addr));
812         }
813         else {
814                 memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink,
815                        sizeof(ufs_inode->ui_u2.ui_symlink));
816         }
817
818         if (!inode->i_nlink)
819                 memset (ufs_inode, 0, sizeof(struct ufs_inode));
820 }
821
822 static void ufs2_update_inode(struct inode *inode, struct ufs2_inode *ufs_inode)
823 {
824         struct super_block *sb = inode->i_sb;
825         struct ufs_inode_info *ufsi = UFS_I(inode);
826
827         UFSD("ENTER\n");
828         ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode);
829         ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink);
830
831         ufs_inode->ui_uid = cpu_to_fs32(sb, inode->i_uid);
832         ufs_inode->ui_gid = cpu_to_fs32(sb, inode->i_gid);
833
834         ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size);
835         ufs_inode->ui_atime = cpu_to_fs64(sb, inode->i_atime.tv_sec);
836         ufs_inode->ui_atimensec = cpu_to_fs32(sb, inode->i_atime.tv_nsec);
837         ufs_inode->ui_ctime = cpu_to_fs64(sb, inode->i_ctime.tv_sec);
838         ufs_inode->ui_ctimensec = cpu_to_fs32(sb, inode->i_ctime.tv_nsec);
839         ufs_inode->ui_mtime = cpu_to_fs64(sb, inode->i_mtime.tv_sec);
840         ufs_inode->ui_mtimensec = cpu_to_fs32(sb, inode->i_mtime.tv_nsec);
841
842         ufs_inode->ui_blocks = cpu_to_fs64(sb, inode->i_blocks);
843         ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags);
844         ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation);
845
846         if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
847                 /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */
848                 ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.u2_i_data[0];
849         } else if (inode->i_blocks) {
850                 memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.u2_i_data,
851                        sizeof(ufs_inode->ui_u2.ui_addr));
852         } else {
853                 memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink,
854                        sizeof(ufs_inode->ui_u2.ui_symlink));
855         }
856
857         if (!inode->i_nlink)
858                 memset (ufs_inode, 0, sizeof(struct ufs2_inode));
859         UFSD("EXIT\n");
860 }
861
862 static int ufs_update_inode(struct inode * inode, int do_sync)
863 {
864         struct super_block *sb = inode->i_sb;
865         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
866         struct buffer_head * bh;
867
868         UFSD("ENTER, ino %lu\n", inode->i_ino);
869
870         if (inode->i_ino < UFS_ROOTINO ||
871             inode->i_ino > (uspi->s_ncg * uspi->s_ipg)) {
872                 ufs_warning (sb, "ufs_read_inode", "bad inode number (%lu)\n", inode->i_ino);
873                 return -1;
874         }
875
876         bh = sb_bread(sb, ufs_inotofsba(inode->i_ino));
877         if (!bh) {
878                 ufs_warning (sb, "ufs_read_inode", "unable to read inode %lu\n", inode->i_ino);
879                 return -1;
880         }
881         if (uspi->fs_magic == UFS2_MAGIC) {
882                 struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data;
883
884                 ufs2_update_inode(inode,
885                                   ufs2_inode + ufs_inotofsbo(inode->i_ino));
886         } else {
887                 struct ufs_inode *ufs_inode = (struct ufs_inode *) bh->b_data;
888
889                 ufs1_update_inode(inode, ufs_inode + ufs_inotofsbo(inode->i_ino));
890         }
891                 
892         mark_buffer_dirty(bh);
893         if (do_sync)
894                 sync_dirty_buffer(bh);
895         brelse (bh);
896         
897         UFSD("EXIT\n");
898         return 0;
899 }
900
901 int ufs_write_inode (struct inode * inode, int wait)
902 {
903         int ret;
904         lock_kernel();
905         ret = ufs_update_inode (inode, wait);
906         unlock_kernel();
907         return ret;
908 }
909
910 int ufs_sync_inode (struct inode *inode)
911 {
912         return ufs_update_inode (inode, 1);
913 }
914
915 void ufs_delete_inode (struct inode * inode)
916 {
917         loff_t old_i_size;
918
919         truncate_inode_pages(&inode->i_data, 0);
920         if (is_bad_inode(inode))
921                 goto no_delete;
922         /*UFS_I(inode)->i_dtime = CURRENT_TIME;*/
923         lock_kernel();
924         mark_inode_dirty(inode);
925         ufs_update_inode(inode, IS_SYNC(inode));
926         old_i_size = inode->i_size;
927         inode->i_size = 0;
928         if (inode->i_blocks && ufs_truncate(inode, old_i_size))
929                 ufs_warning(inode->i_sb, __func__, "ufs_truncate failed\n");
930         ufs_free_inode (inode);
931         unlock_kernel();
932         return;
933 no_delete:
934         clear_inode(inode);     /* We must guarantee clearing of inode... */
935 }