]> nv-tegra.nvidia Code Review - linux-2.6.git/blob - fs/ufs/inode.c
Merge branch 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik...
[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, unsigned int 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 block, blockoff, lastfrag, lastblock, lastblockoff;
182         unsigned tmp, goal;
183         __fs32 * p, * p2;
184
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);
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 = ufsi->i_u1.i_data + block;
197         goal = 0;
198
199 repeat:
200         tmp = fs32_to_cpu(sb, *p);
201         lastfrag = ufsi->i_lastfrag;
202         if (tmp && fragment < lastfrag) {
203                 if (!phys) {
204                         result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff);
205                         if (tmp == fs32_to_cpu(sb, *p)) {
206                                 UFSD("EXIT, result %u\n", tmp + blockoff);
207                                 return result;
208                         }
209                         brelse (result);
210                         goto repeat;
211                 } else {
212                         *phys = tmp + blockoff;
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, 
229                                                  fs32_to_cpu(sb, *p2), uspi->s_fpb - lastblockoff,
230                                                  err, locked_page);
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                 }
240                 tmp = fs32_to_cpu(sb, ufsi->i_u1.i_data[lastblock]);
241                 if (tmp)
242                         goal = tmp + uspi->s_fpb;
243                 tmp = ufs_new_fragments (inode, p, fragment - blockoff, 
244                                          goal, required + blockoff,
245                                          err,
246                                          phys != NULL ? locked_page : NULL);
247         }
248         /*
249          * We will extend last allocated block
250          */
251         else if (lastblock == block) {
252                 tmp = ufs_new_fragments(inode, p, fragment - (blockoff - lastblockoff),
253                                         fs32_to_cpu(sb, *p), required +  (blockoff - lastblockoff),
254                                         err, phys != NULL ? locked_page : NULL);
255         } else /* (lastblock > block) */ {
256         /*
257          * We will allocate new block before last allocated block
258          */
259                 if (block) {
260                         tmp = fs32_to_cpu(sb, ufsi->i_u1.i_data[block-1]);
261                         if (tmp)
262                                 goal = tmp + uspi->s_fpb;
263                 }
264                 tmp = ufs_new_fragments(inode, p, fragment - blockoff,
265                                         goal, uspi->s_fpb, err,
266                                         phys != NULL ? locked_page : NULL);
267         }
268         if (!tmp) {
269                 if ((!blockoff && *p) || 
270                     (blockoff && lastfrag != ufsi->i_lastfrag))
271                         goto repeat;
272                 *err = -ENOSPC;
273                 return NULL;
274         }
275
276         if (!phys) {
277                 result = sb_getblk(sb, tmp + blockoff);
278         } else {
279                 *phys = tmp + blockoff;
280                 result = NULL;
281                 *err = 0;
282                 *new = 1;
283         }
284
285         inode->i_ctime = CURRENT_TIME_SEC;
286         if (IS_SYNC(inode))
287                 ufs_sync_inode (inode);
288         mark_inode_dirty(inode);
289         UFSD("EXIT, result %u\n", tmp + blockoff);
290         return result;
291
292      /* This part : To be implemented ....
293         Required only for writing, not required for READ-ONLY.
294 ufs2:
295
296         u2_block = ufs_fragstoblks(fragment);
297         u2_blockoff = ufs_fragnum(fragment);
298         p = ufsi->i_u1.u2_i_data + block;
299         goal = 0;
300
301 repeat2:
302         tmp = fs32_to_cpu(sb, *p);
303         lastfrag = ufsi->i_lastfrag;
304
305      */
306 }
307
308 /**
309  * ufs_inode_getblock() - allocate new block
310  * @inode - pointer to inode
311  * @bh - pointer to block which hold "pointer" to new allocated block
312  * @fragment - number of `fragment' which hold pointer
313  *   to new allocated block
314  * @new_fragment - number of new allocated fragment
315  *  (block will hold this fragment and also uspi->s_fpb-1)
316  * @err - see ufs_inode_getfrag()
317  * @phys - see ufs_inode_getfrag()
318  * @new - see ufs_inode_getfrag()
319  * @locked_page - see ufs_inode_getfrag()
320  */
321 static struct buffer_head *
322 ufs_inode_getblock(struct inode *inode, struct buffer_head *bh,
323                   unsigned int fragment, sector_t new_fragment, int *err,
324                   long *phys, int *new, struct page *locked_page)
325 {
326         struct super_block *sb = inode->i_sb;
327         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
328         struct buffer_head * result;
329         unsigned tmp, goal, block, blockoff;
330         __fs32 * p;
331
332         block = ufs_fragstoblks (fragment);
333         blockoff = ufs_fragnum (fragment);
334
335         UFSD("ENTER, ino %lu, fragment %u, new_fragment %llu, metadata %d\n",
336              inode->i_ino, fragment, (unsigned long long)new_fragment, !phys);
337
338         result = NULL;
339         if (!bh)
340                 goto out;
341         if (!buffer_uptodate(bh)) {
342                 ll_rw_block (READ, 1, &bh);
343                 wait_on_buffer (bh);
344                 if (!buffer_uptodate(bh))
345                         goto out;
346         }
347
348         p = (__fs32 *) bh->b_data + block;
349 repeat:
350         tmp = fs32_to_cpu(sb, *p);
351         if (tmp) {
352                 if (!phys) {
353                         result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff);
354                         if (tmp == fs32_to_cpu(sb, *p))
355                                 goto out;
356                         brelse (result);
357                         goto repeat;
358                 } else {
359                         *phys = tmp + blockoff;
360                         goto out;
361                 }
362         }
363
364         if (block && (tmp = fs32_to_cpu(sb, ((__fs32*)bh->b_data)[block-1])))
365                 goal = tmp + uspi->s_fpb;
366         else
367                 goal = bh->b_blocknr + uspi->s_fpb;
368         tmp = ufs_new_fragments(inode, p, ufs_blknum(new_fragment), goal,
369                                 uspi->s_fpb, err, locked_page);
370         if (!tmp) {
371                 if (fs32_to_cpu(sb, *p))
372                         goto repeat;
373                 goto out;
374         }               
375
376
377         if (!phys) {
378                 result = sb_getblk(sb, tmp + blockoff);
379         } else {
380                 *phys = tmp + blockoff;
381                 *new = 1;
382         }
383
384         mark_buffer_dirty(bh);
385         if (IS_SYNC(inode))
386                 sync_dirty_buffer(bh);
387         inode->i_ctime = CURRENT_TIME_SEC;
388         mark_inode_dirty(inode);
389         UFSD("result %u\n", tmp + blockoff);
390 out:
391         brelse (bh);
392         UFSD("EXIT\n");
393         return result;
394 }
395
396 /**
397  * ufs_getfrag_bloc() - `get_block_t' function, interface between UFS and
398  * readpage, writepage and so on
399  */
400
401 int ufs_getfrag_block(struct inode *inode, sector_t fragment, struct buffer_head *bh_result, int create)
402 {
403         struct super_block * sb = inode->i_sb;
404         struct ufs_sb_private_info * uspi = UFS_SB(sb)->s_uspi;
405         struct buffer_head * bh;
406         int ret, err, new;
407         unsigned long ptr,phys;
408         u64 phys64 = 0;
409         
410         if (!create) {
411                 phys64 = ufs_frag_map(inode, fragment);
412                 UFSD("phys64 = %llu\n", (unsigned long long)phys64);
413                 if (phys64)
414                         map_bh(bh_result, sb, phys64);
415                 return 0;
416         }
417
418         /* This code entered only while writing ....? */
419
420         err = -EIO;
421         new = 0;
422         ret = 0;
423         bh = NULL;
424
425         lock_kernel();
426
427         UFSD("ENTER, ino %lu, fragment %llu\n", inode->i_ino, (unsigned long long)fragment);
428         if (fragment < 0)
429                 goto abort_negative;
430         if (fragment >
431             ((UFS_NDADDR + uspi->s_apb + uspi->s_2apb + uspi->s_3apb)
432              << uspi->s_fpbshift))
433                 goto abort_too_big;
434
435         err = 0;
436         ptr = fragment;
437           
438         /*
439          * ok, these macros clean the logic up a bit and make
440          * it much more readable:
441          */
442 #define GET_INODE_DATABLOCK(x) \
443         ufs_inode_getfrag(inode, x, fragment, 1, &err, &phys, &new,\
444                           bh_result->b_page)
445 #define GET_INODE_PTR(x) \
446         ufs_inode_getfrag(inode, x, fragment, uspi->s_fpb, &err, NULL, NULL,\
447                           bh_result->b_page)
448 #define GET_INDIRECT_DATABLOCK(x) \
449         ufs_inode_getblock(inode, bh, x, fragment,      \
450                           &err, &phys, &new, bh_result->b_page)
451 #define GET_INDIRECT_PTR(x) \
452         ufs_inode_getblock(inode, bh, x, fragment,      \
453                           &err, NULL, NULL, NULL)
454
455         if (ptr < UFS_NDIR_FRAGMENT) {
456                 bh = GET_INODE_DATABLOCK(ptr);
457                 goto out;
458         }
459         ptr -= UFS_NDIR_FRAGMENT;
460         if (ptr < (1 << (uspi->s_apbshift + uspi->s_fpbshift))) {
461                 bh = GET_INODE_PTR(UFS_IND_FRAGMENT + (ptr >> uspi->s_apbshift));
462                 goto get_indirect;
463         }
464         ptr -= 1 << (uspi->s_apbshift + uspi->s_fpbshift);
465         if (ptr < (1 << (uspi->s_2apbshift + uspi->s_fpbshift))) {
466                 bh = GET_INODE_PTR(UFS_DIND_FRAGMENT + (ptr >> uspi->s_2apbshift));
467                 goto get_double;
468         }
469         ptr -= 1 << (uspi->s_2apbshift + uspi->s_fpbshift);
470         bh = GET_INODE_PTR(UFS_TIND_FRAGMENT + (ptr >> uspi->s_3apbshift));
471         bh = GET_INDIRECT_PTR((ptr >> uspi->s_2apbshift) & uspi->s_apbmask);
472 get_double:
473         bh = GET_INDIRECT_PTR((ptr >> uspi->s_apbshift) & uspi->s_apbmask);
474 get_indirect:
475         bh = GET_INDIRECT_DATABLOCK(ptr & uspi->s_apbmask);
476
477 #undef GET_INODE_DATABLOCK
478 #undef GET_INODE_PTR
479 #undef GET_INDIRECT_DATABLOCK
480 #undef GET_INDIRECT_PTR
481
482 out:
483         if (err)
484                 goto abort;
485         if (new)
486                 set_buffer_new(bh_result);
487         map_bh(bh_result, sb, phys);
488 abort:
489         unlock_kernel();
490         return err;
491
492 abort_negative:
493         ufs_warning(sb, "ufs_get_block", "block < 0");
494         goto abort;
495
496 abort_too_big:
497         ufs_warning(sb, "ufs_get_block", "block > big");
498         goto abort;
499 }
500
501 static struct buffer_head *ufs_getfrag(struct inode *inode,
502                                        unsigned int fragment,
503                                        int create, int *err)
504 {
505         struct buffer_head dummy;
506         int error;
507
508         dummy.b_state = 0;
509         dummy.b_blocknr = -1000;
510         error = ufs_getfrag_block(inode, fragment, &dummy, create);
511         *err = error;
512         if (!error && buffer_mapped(&dummy)) {
513                 struct buffer_head *bh;
514                 bh = sb_getblk(inode->i_sb, dummy.b_blocknr);
515                 if (buffer_new(&dummy)) {
516                         memset(bh->b_data, 0, inode->i_sb->s_blocksize);
517                         set_buffer_uptodate(bh);
518                         mark_buffer_dirty(bh);
519                 }
520                 return bh;
521         }
522         return NULL;
523 }
524
525 struct buffer_head * ufs_bread (struct inode * inode, unsigned fragment,
526         int create, int * err)
527 {
528         struct buffer_head * bh;
529
530         UFSD("ENTER, ino %lu, fragment %u\n", inode->i_ino, fragment);
531         bh = ufs_getfrag (inode, fragment, create, err);
532         if (!bh || buffer_uptodate(bh))                 
533                 return bh;
534         ll_rw_block (READ, 1, &bh);
535         wait_on_buffer (bh);
536         if (buffer_uptodate(bh))
537                 return bh;
538         brelse (bh);
539         *err = -EIO;
540         return NULL;
541 }
542
543 static int ufs_writepage(struct page *page, struct writeback_control *wbc)
544 {
545         return block_write_full_page(page,ufs_getfrag_block,wbc);
546 }
547 static int ufs_readpage(struct file *file, struct page *page)
548 {
549         return block_read_full_page(page,ufs_getfrag_block);
550 }
551 static int ufs_prepare_write(struct file *file, struct page *page, unsigned from, unsigned to)
552 {
553         return block_prepare_write(page,from,to,ufs_getfrag_block);
554 }
555 static sector_t ufs_bmap(struct address_space *mapping, sector_t block)
556 {
557         return generic_block_bmap(mapping,block,ufs_getfrag_block);
558 }
559 const struct address_space_operations ufs_aops = {
560         .readpage = ufs_readpage,
561         .writepage = ufs_writepage,
562         .sync_page = block_sync_page,
563         .prepare_write = ufs_prepare_write,
564         .commit_write = generic_commit_write,
565         .bmap = ufs_bmap
566 };
567
568 static void ufs_set_inode_ops(struct inode *inode)
569 {
570         if (S_ISREG(inode->i_mode)) {
571                 inode->i_op = &ufs_file_inode_operations;
572                 inode->i_fop = &ufs_file_operations;
573                 inode->i_mapping->a_ops = &ufs_aops;
574         } else if (S_ISDIR(inode->i_mode)) {
575                 inode->i_op = &ufs_dir_inode_operations;
576                 inode->i_fop = &ufs_dir_operations;
577                 inode->i_mapping->a_ops = &ufs_aops;
578         } else if (S_ISLNK(inode->i_mode)) {
579                 if (!inode->i_blocks)
580                         inode->i_op = &ufs_fast_symlink_inode_operations;
581                 else {
582                         inode->i_op = &page_symlink_inode_operations;
583                         inode->i_mapping->a_ops = &ufs_aops;
584                 }
585         } else
586                 init_special_inode(inode, inode->i_mode,
587                                    ufs_get_inode_dev(inode->i_sb, UFS_I(inode)));
588 }
589
590 static void ufs1_read_inode(struct inode *inode, struct ufs_inode *ufs_inode)
591 {
592         struct ufs_inode_info *ufsi = UFS_I(inode);
593         struct super_block *sb = inode->i_sb;
594         mode_t mode;
595         unsigned i;
596
597         /*
598          * Copy data to the in-core inode.
599          */
600         inode->i_mode = mode = fs16_to_cpu(sb, ufs_inode->ui_mode);
601         inode->i_nlink = fs16_to_cpu(sb, ufs_inode->ui_nlink);
602         if (inode->i_nlink == 0)
603                 ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino);
604         
605         /*
606          * Linux now has 32-bit uid and gid, so we can support EFT.
607          */
608         inode->i_uid = ufs_get_inode_uid(sb, ufs_inode);
609         inode->i_gid = ufs_get_inode_gid(sb, ufs_inode);
610
611         inode->i_size = fs64_to_cpu(sb, ufs_inode->ui_size);
612         inode->i_atime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_atime.tv_sec);
613         inode->i_ctime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_ctime.tv_sec);
614         inode->i_mtime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_mtime.tv_sec);
615         inode->i_mtime.tv_nsec = 0;
616         inode->i_atime.tv_nsec = 0;
617         inode->i_ctime.tv_nsec = 0;
618         inode->i_blocks = fs32_to_cpu(sb, ufs_inode->ui_blocks);
619         ufsi->i_flags = fs32_to_cpu(sb, ufs_inode->ui_flags);
620         ufsi->i_gen = fs32_to_cpu(sb, ufs_inode->ui_gen);
621         ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow);
622         ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag);
623
624         
625         if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) {
626                 for (i = 0; i < (UFS_NDADDR + UFS_NINDIR); i++)
627                         ufsi->i_u1.i_data[i] = ufs_inode->ui_u2.ui_addr.ui_db[i];
628         } else {
629                 for (i = 0; i < (UFS_NDADDR + UFS_NINDIR) * 4; i++)
630                         ufsi->i_u1.i_symlink[i] = ufs_inode->ui_u2.ui_symlink[i];
631         }
632 }
633
634 static void ufs2_read_inode(struct inode *inode, struct ufs2_inode *ufs2_inode)
635 {
636         struct ufs_inode_info *ufsi = UFS_I(inode);
637         struct super_block *sb = inode->i_sb;
638         mode_t mode;
639         unsigned i;
640
641         UFSD("Reading ufs2 inode, ino %lu\n", inode->i_ino);
642         /*
643          * Copy data to the in-core inode.
644          */
645         inode->i_mode = mode = fs16_to_cpu(sb, ufs2_inode->ui_mode);
646         inode->i_nlink = fs16_to_cpu(sb, ufs2_inode->ui_nlink);
647         if (inode->i_nlink == 0)
648                 ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino);
649
650         /*
651          * Linux now has 32-bit uid and gid, so we can support EFT.
652          */
653         inode->i_uid = fs32_to_cpu(sb, ufs2_inode->ui_uid);
654         inode->i_gid = fs32_to_cpu(sb, ufs2_inode->ui_gid);
655
656         inode->i_size = fs64_to_cpu(sb, ufs2_inode->ui_size);
657         inode->i_atime.tv_sec = fs32_to_cpu(sb, ufs2_inode->ui_atime.tv_sec);
658         inode->i_ctime.tv_sec = fs32_to_cpu(sb, ufs2_inode->ui_ctime.tv_sec);
659         inode->i_mtime.tv_sec = fs32_to_cpu(sb, ufs2_inode->ui_mtime.tv_sec);
660         inode->i_mtime.tv_nsec = 0;
661         inode->i_atime.tv_nsec = 0;
662         inode->i_ctime.tv_nsec = 0;
663         inode->i_blocks = fs64_to_cpu(sb, ufs2_inode->ui_blocks);
664         ufsi->i_flags = fs32_to_cpu(sb, ufs2_inode->ui_flags);
665         ufsi->i_gen = fs32_to_cpu(sb, ufs2_inode->ui_gen);
666         /*
667         ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow);
668         ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag);
669         */
670
671         if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) {
672                 for (i = 0; i < (UFS_NDADDR + UFS_NINDIR); i++)
673                         ufsi->i_u1.u2_i_data[i] =
674                                 ufs2_inode->ui_u2.ui_addr.ui_db[i];
675         } else {
676                 for (i = 0; i < (UFS_NDADDR + UFS_NINDIR) * 4; i++)
677                         ufsi->i_u1.i_symlink[i] = ufs2_inode->ui_u2.ui_symlink[i];
678         }
679 }
680
681 void ufs_read_inode(struct inode * inode)
682 {
683         struct ufs_inode_info *ufsi = UFS_I(inode);
684         struct super_block * sb;
685         struct ufs_sb_private_info * uspi;
686         struct buffer_head * bh;
687
688         UFSD("ENTER, ino %lu\n", inode->i_ino);
689
690         sb = inode->i_sb;
691         uspi = UFS_SB(sb)->s_uspi;
692
693         if (inode->i_ino < UFS_ROOTINO ||
694             inode->i_ino > (uspi->s_ncg * uspi->s_ipg)) {
695                 ufs_warning(sb, "ufs_read_inode", "bad inode number (%lu)\n",
696                             inode->i_ino);
697                 goto bad_inode;
698         }
699
700         bh = sb_bread(sb, uspi->s_sbbase + ufs_inotofsba(inode->i_ino));
701         if (!bh) {
702                 ufs_warning(sb, "ufs_read_inode", "unable to read inode %lu\n",
703                             inode->i_ino);
704                 goto bad_inode;
705         }
706         if ((UFS_SB(sb)->s_flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
707                 struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data;
708
709                 ufs2_read_inode(inode,
710                                 ufs2_inode + ufs_inotofsbo(inode->i_ino));
711         } else {
712                 struct ufs_inode *ufs_inode = (struct ufs_inode *)bh->b_data;
713
714                 ufs1_read_inode(inode, ufs_inode + ufs_inotofsbo(inode->i_ino));
715         }
716
717         inode->i_version++;
718         ufsi->i_lastfrag =
719                 (inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift;
720         ufsi->i_dir_start_lookup = 0;
721         ufsi->i_osync = 0;
722
723         ufs_set_inode_ops(inode);
724
725         brelse(bh);
726
727         UFSD("EXIT\n");
728         return;
729
730 bad_inode:
731         make_bad_inode(inode);
732 }
733
734 static int ufs_update_inode(struct inode * inode, int do_sync)
735 {
736         struct ufs_inode_info *ufsi = UFS_I(inode);
737         struct super_block * sb;
738         struct ufs_sb_private_info * uspi;
739         struct buffer_head * bh;
740         struct ufs_inode * ufs_inode;
741         unsigned i;
742         unsigned flags;
743
744         UFSD("ENTER, ino %lu\n", inode->i_ino);
745
746         sb = inode->i_sb;
747         uspi = UFS_SB(sb)->s_uspi;
748         flags = UFS_SB(sb)->s_flags;
749
750         if (inode->i_ino < UFS_ROOTINO || 
751             inode->i_ino > (uspi->s_ncg * uspi->s_ipg)) {
752                 ufs_warning (sb, "ufs_read_inode", "bad inode number (%lu)\n", inode->i_ino);
753                 return -1;
754         }
755
756         bh = sb_bread(sb, ufs_inotofsba(inode->i_ino));
757         if (!bh) {
758                 ufs_warning (sb, "ufs_read_inode", "unable to read inode %lu\n", inode->i_ino);
759                 return -1;
760         }
761         ufs_inode = (struct ufs_inode *) (bh->b_data + ufs_inotofsbo(inode->i_ino) * sizeof(struct ufs_inode));
762
763         ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode);
764         ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink);
765
766         ufs_set_inode_uid(sb, ufs_inode, inode->i_uid);
767         ufs_set_inode_gid(sb, ufs_inode, inode->i_gid);
768                 
769         ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size);
770         ufs_inode->ui_atime.tv_sec = cpu_to_fs32(sb, inode->i_atime.tv_sec);
771         ufs_inode->ui_atime.tv_usec = 0;
772         ufs_inode->ui_ctime.tv_sec = cpu_to_fs32(sb, inode->i_ctime.tv_sec);
773         ufs_inode->ui_ctime.tv_usec = 0;
774         ufs_inode->ui_mtime.tv_sec = cpu_to_fs32(sb, inode->i_mtime.tv_sec);
775         ufs_inode->ui_mtime.tv_usec = 0;
776         ufs_inode->ui_blocks = cpu_to_fs32(sb, inode->i_blocks);
777         ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags);
778         ufs_inode->ui_gen = cpu_to_fs32(sb, ufsi->i_gen);
779
780         if ((flags & UFS_UID_MASK) == UFS_UID_EFT) {
781                 ufs_inode->ui_u3.ui_sun.ui_shadow = cpu_to_fs32(sb, ufsi->i_shadow);
782                 ufs_inode->ui_u3.ui_sun.ui_oeftflag = cpu_to_fs32(sb, ufsi->i_oeftflag);
783         }
784
785         if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
786                 /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */
787                 ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.i_data[0];
788         } else if (inode->i_blocks) {
789                 for (i = 0; i < (UFS_NDADDR + UFS_NINDIR); i++)
790                         ufs_inode->ui_u2.ui_addr.ui_db[i] = ufsi->i_u1.i_data[i];
791         }
792         else {
793                 for (i = 0; i < (UFS_NDADDR + UFS_NINDIR) * 4; i++)
794                         ufs_inode->ui_u2.ui_symlink[i] = ufsi->i_u1.i_symlink[i];
795         }
796
797         if (!inode->i_nlink)
798                 memset (ufs_inode, 0, sizeof(struct ufs_inode));
799                 
800         mark_buffer_dirty(bh);
801         if (do_sync)
802                 sync_dirty_buffer(bh);
803         brelse (bh);
804         
805         UFSD("EXIT\n");
806         return 0;
807 }
808
809 int ufs_write_inode (struct inode * inode, int wait)
810 {
811         int ret;
812         lock_kernel();
813         ret = ufs_update_inode (inode, wait);
814         unlock_kernel();
815         return ret;
816 }
817
818 int ufs_sync_inode (struct inode *inode)
819 {
820         return ufs_update_inode (inode, 1);
821 }
822
823 void ufs_delete_inode (struct inode * inode)
824 {
825         loff_t old_i_size;
826
827         truncate_inode_pages(&inode->i_data, 0);
828         /*UFS_I(inode)->i_dtime = CURRENT_TIME;*/
829         lock_kernel();
830         mark_inode_dirty(inode);
831         ufs_update_inode(inode, IS_SYNC(inode));
832         old_i_size = inode->i_size;
833         inode->i_size = 0;
834         if (inode->i_blocks && ufs_truncate(inode, old_i_size))
835                 ufs_warning(inode->i_sb, __FUNCTION__, "ufs_truncate failed\n");
836         ufs_free_inode (inode);
837         unlock_kernel();
838 }