Merge tag 'v4.3-rc1' into patchwork
[firefly-linux-kernel-4.4.55.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
30 #include <linux/errno.h>
31 #include <linux/fs.h>
32 #include <linux/time.h>
33 #include <linux/stat.h>
34 #include <linux/string.h>
35 #include <linux/mm.h>
36 #include <linux/buffer_head.h>
37 #include <linux/writeback.h>
38
39 #include "ufs_fs.h"
40 #include "ufs.h"
41 #include "swab.h"
42 #include "util.h"
43
44 static int ufs_block_to_path(struct inode *inode, sector_t i_block, unsigned offsets[4])
45 {
46         struct ufs_sb_private_info *uspi = UFS_SB(inode->i_sb)->s_uspi;
47         int ptrs = uspi->s_apb;
48         int ptrs_bits = uspi->s_apbshift;
49         const long direct_blocks = UFS_NDADDR,
50                 indirect_blocks = ptrs,
51                 double_blocks = (1 << (ptrs_bits * 2));
52         int n = 0;
53
54
55         UFSD("ptrs=uspi->s_apb = %d,double_blocks=%ld \n",ptrs,double_blocks);
56         if (i_block < direct_blocks) {
57                 offsets[n++] = i_block;
58         } else if ((i_block -= direct_blocks) < indirect_blocks) {
59                 offsets[n++] = UFS_IND_BLOCK;
60                 offsets[n++] = i_block;
61         } else if ((i_block -= indirect_blocks) < double_blocks) {
62                 offsets[n++] = UFS_DIND_BLOCK;
63                 offsets[n++] = i_block >> ptrs_bits;
64                 offsets[n++] = i_block & (ptrs - 1);
65         } else if (((i_block -= double_blocks) >> (ptrs_bits * 2)) < ptrs) {
66                 offsets[n++] = UFS_TIND_BLOCK;
67                 offsets[n++] = i_block >> (ptrs_bits * 2);
68                 offsets[n++] = (i_block >> ptrs_bits) & (ptrs - 1);
69                 offsets[n++] = i_block & (ptrs - 1);
70         } else {
71                 ufs_warning(inode->i_sb, "ufs_block_to_path", "block > big");
72         }
73         return n;
74 }
75
76 typedef struct {
77         void    *p;
78         union {
79                 __fs32  key32;
80                 __fs64  key64;
81         };
82         struct buffer_head *bh;
83 } Indirect;
84
85 static inline int grow_chain32(struct ufs_inode_info *ufsi,
86                                struct buffer_head *bh, __fs32 *v,
87                                Indirect *from, Indirect *to)
88 {
89         Indirect *p;
90         unsigned seq;
91         to->bh = bh;
92         do {
93                 seq = read_seqbegin(&ufsi->meta_lock);
94                 to->key32 = *(__fs32 *)(to->p = v);
95                 for (p = from; p <= to && p->key32 == *(__fs32 *)p->p; p++)
96                         ;
97         } while (read_seqretry(&ufsi->meta_lock, seq));
98         return (p > to);
99 }
100
101 static inline int grow_chain64(struct ufs_inode_info *ufsi,
102                                struct buffer_head *bh, __fs64 *v,
103                                Indirect *from, Indirect *to)
104 {
105         Indirect *p;
106         unsigned seq;
107         to->bh = bh;
108         do {
109                 seq = read_seqbegin(&ufsi->meta_lock);
110                 to->key64 = *(__fs64 *)(to->p = v);
111                 for (p = from; p <= to && p->key64 == *(__fs64 *)p->p; p++)
112                         ;
113         } while (read_seqretry(&ufsi->meta_lock, seq));
114         return (p > to);
115 }
116
117 /*
118  * Returns the location of the fragment from
119  * the beginning of the filesystem.
120  */
121
122 static u64 ufs_frag_map(struct inode *inode, unsigned offsets[4], int depth)
123 {
124         struct ufs_inode_info *ufsi = UFS_I(inode);
125         struct super_block *sb = inode->i_sb;
126         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
127         u64 mask = (u64) uspi->s_apbmask>>uspi->s_fpbshift;
128         int shift = uspi->s_apbshift-uspi->s_fpbshift;
129         Indirect chain[4], *q = chain;
130         unsigned *p;
131         unsigned flags = UFS_SB(sb)->s_flags;
132         u64 res = 0;
133
134         UFSD(": uspi->s_fpbshift = %d ,uspi->s_apbmask = %x, mask=%llx\n",
135                 uspi->s_fpbshift, uspi->s_apbmask,
136                 (unsigned long long)mask);
137
138         if (depth == 0)
139                 goto no_block;
140
141 again:
142         p = offsets;
143
144         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
145                 goto ufs2;
146
147         if (!grow_chain32(ufsi, NULL, &ufsi->i_u1.i_data[*p++], chain, q))
148                 goto changed;
149         if (!q->key32)
150                 goto no_block;
151         while (--depth) {
152                 __fs32 *ptr;
153                 struct buffer_head *bh;
154                 unsigned n = *p++;
155
156                 bh = sb_bread(sb, uspi->s_sbbase +
157                                   fs32_to_cpu(sb, q->key32) + (n>>shift));
158                 if (!bh)
159                         goto no_block;
160                 ptr = (__fs32 *)bh->b_data + (n & mask);
161                 if (!grow_chain32(ufsi, bh, ptr, chain, ++q))
162                         goto changed;
163                 if (!q->key32)
164                         goto no_block;
165         }
166         res = fs32_to_cpu(sb, q->key32);
167         goto found;
168
169 ufs2:
170         if (!grow_chain64(ufsi, NULL, &ufsi->i_u1.u2_i_data[*p++], chain, q))
171                 goto changed;
172         if (!q->key64)
173                 goto no_block;
174
175         while (--depth) {
176                 __fs64 *ptr;
177                 struct buffer_head *bh;
178                 unsigned n = *p++;
179
180                 bh = sb_bread(sb, uspi->s_sbbase +
181                                   fs64_to_cpu(sb, q->key64) + (n>>shift));
182                 if (!bh)
183                         goto no_block;
184                 ptr = (__fs64 *)bh->b_data + (n & mask);
185                 if (!grow_chain64(ufsi, bh, ptr, chain, ++q))
186                         goto changed;
187                 if (!q->key64)
188                         goto no_block;
189         }
190         res = fs64_to_cpu(sb, q->key64);
191 found:
192         res += uspi->s_sbbase;
193 no_block:
194         while (q > chain) {
195                 brelse(q->bh);
196                 q--;
197         }
198         return res;
199
200 changed:
201         while (q > chain) {
202                 brelse(q->bh);
203                 q--;
204         }
205         goto again;
206 }
207
208 /*
209  * Unpacking tails: we have a file with partial final block and
210  * we had been asked to extend it.  If the fragment being written
211  * is within the same block, we need to extend the tail just to cover
212  * that fragment.  Otherwise the tail is extended to full block.
213  *
214  * Note that we might need to create a _new_ tail, but that will
215  * be handled elsewhere; this is strictly for resizing old
216  * ones.
217  */
218 static bool
219 ufs_extend_tail(struct inode *inode, u64 writes_to,
220                   int *err, struct page *locked_page)
221 {
222         struct ufs_inode_info *ufsi = UFS_I(inode);
223         struct super_block *sb = inode->i_sb;
224         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
225         unsigned lastfrag = ufsi->i_lastfrag;   /* it's a short file, so unsigned is enough */
226         unsigned block = ufs_fragstoblks(lastfrag);
227         unsigned new_size;
228         void *p;
229         u64 tmp;
230
231         if (writes_to < (lastfrag | uspi->s_fpbmask))
232                 new_size = (writes_to & uspi->s_fpbmask) + 1;
233         else
234                 new_size = uspi->s_fpb;
235
236         p = ufs_get_direct_data_ptr(uspi, ufsi, block);
237         tmp = ufs_new_fragments(inode, p, lastfrag, ufs_data_ptr_to_cpu(sb, p),
238                                 new_size, err, locked_page);
239         return tmp != 0;
240 }
241
242 /**
243  * ufs_inode_getfrag() - allocate new fragment(s)
244  * @inode: pointer to inode
245  * @index: number of block pointer within the inode's array.
246  * @new_fragment: number of new allocated fragment(s)
247  * @err: we set it if something wrong
248  * @new: we set it if we allocate new block
249  * @locked_page: for ufs_new_fragments()
250  */
251 static u64
252 ufs_inode_getfrag(struct inode *inode, unsigned index,
253                   sector_t new_fragment, int *err,
254                   int *new, struct page *locked_page)
255 {
256         struct ufs_inode_info *ufsi = UFS_I(inode);
257         struct super_block *sb = inode->i_sb;
258         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
259         u64 tmp, goal, lastfrag;
260         unsigned nfrags = uspi->s_fpb;
261         void *p;
262
263         /* TODO : to be done for write support
264         if ( (flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
265              goto ufs2;
266          */
267
268         p = ufs_get_direct_data_ptr(uspi, ufsi, index);
269         tmp = ufs_data_ptr_to_cpu(sb, p);
270         if (tmp)
271                 goto out;
272
273         lastfrag = ufsi->i_lastfrag;
274
275         /* will that be a new tail? */
276         if (new_fragment < UFS_NDIR_FRAGMENT && new_fragment >= lastfrag)
277                 nfrags = (new_fragment & uspi->s_fpbmask) + 1;
278
279         goal = 0;
280         if (index) {
281                 goal = ufs_data_ptr_to_cpu(sb,
282                                  ufs_get_direct_data_ptr(uspi, ufsi, index - 1));
283                 if (goal)
284                         goal += uspi->s_fpb;
285         }
286         tmp = ufs_new_fragments(inode, p, ufs_blknum(new_fragment),
287                                 goal, uspi->s_fpb, err, locked_page);
288
289         if (!tmp) {
290                 *err = -ENOSPC;
291                 return 0;
292         }
293
294         if (new)
295                 *new = 1;
296         inode->i_ctime = CURRENT_TIME_SEC;
297         if (IS_SYNC(inode))
298                 ufs_sync_inode (inode);
299         mark_inode_dirty(inode);
300 out:
301         return tmp + uspi->s_sbbase;
302
303      /* This part : To be implemented ....
304         Required only for writing, not required for READ-ONLY.
305 ufs2:
306
307         u2_block = ufs_fragstoblks(fragment);
308         u2_blockoff = ufs_fragnum(fragment);
309         p = ufsi->i_u1.u2_i_data + block;
310         goal = 0;
311
312 repeat2:
313         tmp = fs32_to_cpu(sb, *p);
314         lastfrag = ufsi->i_lastfrag;
315
316      */
317 }
318
319 /**
320  * ufs_inode_getblock() - allocate new block
321  * @inode: pointer to inode
322  * @ind_block: block number of the indirect block
323  * @index: number of pointer within the indirect block
324  * @new_fragment: number of new allocated fragment
325  *  (block will hold this fragment and also uspi->s_fpb-1)
326  * @err: see ufs_inode_getfrag()
327  * @new: see ufs_inode_getfrag()
328  * @locked_page: see ufs_inode_getfrag()
329  */
330 static u64
331 ufs_inode_getblock(struct inode *inode, u64 ind_block,
332                   unsigned index, sector_t new_fragment, int *err,
333                   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         int shift = uspi->s_apbshift - uspi->s_fpbshift;
338         u64 tmp = 0, goal;
339         struct buffer_head *bh;
340         void *p;
341
342         if (!ind_block)
343                 return 0;
344
345         bh = sb_bread(sb, ind_block + (index >> shift));
346         if (unlikely(!bh)) {
347                 *err = -EIO;
348                 return 0;
349         }
350
351         index &= uspi->s_apbmask >> uspi->s_fpbshift;
352         if (uspi->fs_magic == UFS2_MAGIC)
353                 p = (__fs64 *)bh->b_data + index;
354         else
355                 p = (__fs32 *)bh->b_data + index;
356
357         tmp = ufs_data_ptr_to_cpu(sb, p);
358         if (tmp)
359                 goto out;
360
361         if (index && (uspi->fs_magic == UFS2_MAGIC ?
362                       (tmp = fs64_to_cpu(sb, ((__fs64 *)bh->b_data)[index-1])) :
363                       (tmp = fs32_to_cpu(sb, ((__fs32 *)bh->b_data)[index-1]))))
364                 goal = tmp + uspi->s_fpb;
365         else
366                 goal = bh->b_blocknr + uspi->s_fpb;
367         tmp = ufs_new_fragments(inode, p, ufs_blknum(new_fragment), goal,
368                                 uspi->s_fpb, err, locked_page);
369         if (!tmp)
370                 goto out;
371
372         if (new)
373                 *new = 1;
374
375         mark_buffer_dirty(bh);
376         if (IS_SYNC(inode))
377                 sync_dirty_buffer(bh);
378         inode->i_ctime = CURRENT_TIME_SEC;
379         mark_inode_dirty(inode);
380 out:
381         brelse (bh);
382         UFSD("EXIT\n");
383         if (tmp)
384                 tmp += uspi->s_sbbase;
385         return tmp;
386 }
387
388 /**
389  * ufs_getfrag_block() - `get_block_t' function, interface between UFS and
390  * readpage, writepage and so on
391  */
392
393 static int ufs_getfrag_block(struct inode *inode, sector_t fragment, struct buffer_head *bh_result, int create)
394 {
395         struct super_block *sb = inode->i_sb;
396         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
397         int err = 0, new = 0;
398         unsigned offsets[4];
399         int depth = ufs_block_to_path(inode, fragment >> uspi->s_fpbshift, offsets);
400         u64 phys64 = 0;
401         unsigned frag = fragment & uspi->s_fpbmask;
402
403         if (!create) {
404                 phys64 = ufs_frag_map(inode, offsets, depth);
405                 goto out;
406         }
407
408         /* This code entered only while writing ....? */
409
410         mutex_lock(&UFS_I(inode)->truncate_mutex);
411
412         UFSD("ENTER, ino %lu, fragment %llu\n", inode->i_ino, (unsigned long long)fragment);
413         if (unlikely(!depth)) {
414                 ufs_warning(sb, "ufs_get_block", "block > big");
415                 err = -EIO;
416                 goto out;
417         }
418
419         if (UFS_I(inode)->i_lastfrag < UFS_NDIR_FRAGMENT) {
420                 unsigned lastfrag = UFS_I(inode)->i_lastfrag;
421                 unsigned tailfrags = lastfrag & uspi->s_fpbmask;
422                 if (tailfrags && fragment >= lastfrag) {
423                         if (!ufs_extend_tail(inode, fragment,
424                                              &err, bh_result->b_page))
425                                 goto out;
426                 }
427         }
428
429         if (depth == 1) {
430                 phys64 = ufs_inode_getfrag(inode, offsets[0], fragment,
431                                            &err, &new, bh_result->b_page);
432         } else {
433                 int i;
434                 phys64 = ufs_inode_getfrag(inode, offsets[0], fragment,
435                                            &err, NULL, NULL);
436                 for (i = 1; i < depth - 1; i++)
437                         phys64 = ufs_inode_getblock(inode, phys64, offsets[i],
438                                                 fragment, &err, NULL, NULL);
439                 phys64 = ufs_inode_getblock(inode, phys64, offsets[depth - 1],
440                                         fragment, &err, &new, bh_result->b_page);
441         }
442 out:
443         if (phys64) {
444                 phys64 += frag;
445                 map_bh(bh_result, sb, phys64);
446                 if (new)
447                         set_buffer_new(bh_result);
448         }
449         mutex_unlock(&UFS_I(inode)->truncate_mutex);
450         return err;
451 }
452
453 static int ufs_writepage(struct page *page, struct writeback_control *wbc)
454 {
455         return block_write_full_page(page,ufs_getfrag_block,wbc);
456 }
457
458 static int ufs_readpage(struct file *file, struct page *page)
459 {
460         return block_read_full_page(page,ufs_getfrag_block);
461 }
462
463 int ufs_prepare_chunk(struct page *page, loff_t pos, unsigned len)
464 {
465         return __block_write_begin(page, pos, len, ufs_getfrag_block);
466 }
467
468 static void ufs_truncate_blocks(struct inode *);
469
470 static void ufs_write_failed(struct address_space *mapping, loff_t to)
471 {
472         struct inode *inode = mapping->host;
473
474         if (to > inode->i_size) {
475                 truncate_pagecache(inode, inode->i_size);
476                 ufs_truncate_blocks(inode);
477         }
478 }
479
480 static int ufs_write_begin(struct file *file, struct address_space *mapping,
481                         loff_t pos, unsigned len, unsigned flags,
482                         struct page **pagep, void **fsdata)
483 {
484         int ret;
485
486         ret = block_write_begin(mapping, pos, len, flags, pagep,
487                                 ufs_getfrag_block);
488         if (unlikely(ret))
489                 ufs_write_failed(mapping, pos + len);
490
491         return ret;
492 }
493
494 static int ufs_write_end(struct file *file, struct address_space *mapping,
495                         loff_t pos, unsigned len, unsigned copied,
496                         struct page *page, void *fsdata)
497 {
498         int ret;
499
500         ret = generic_write_end(file, mapping, pos, len, copied, page, fsdata);
501         if (ret < len)
502                 ufs_write_failed(mapping, pos + len);
503         return ret;
504 }
505
506 static sector_t ufs_bmap(struct address_space *mapping, sector_t block)
507 {
508         return generic_block_bmap(mapping,block,ufs_getfrag_block);
509 }
510
511 const struct address_space_operations ufs_aops = {
512         .readpage = ufs_readpage,
513         .writepage = ufs_writepage,
514         .write_begin = ufs_write_begin,
515         .write_end = ufs_write_end,
516         .bmap = ufs_bmap
517 };
518
519 static void ufs_set_inode_ops(struct inode *inode)
520 {
521         if (S_ISREG(inode->i_mode)) {
522                 inode->i_op = &ufs_file_inode_operations;
523                 inode->i_fop = &ufs_file_operations;
524                 inode->i_mapping->a_ops = &ufs_aops;
525         } else if (S_ISDIR(inode->i_mode)) {
526                 inode->i_op = &ufs_dir_inode_operations;
527                 inode->i_fop = &ufs_dir_operations;
528                 inode->i_mapping->a_ops = &ufs_aops;
529         } else if (S_ISLNK(inode->i_mode)) {
530                 if (!inode->i_blocks) {
531                         inode->i_op = &ufs_fast_symlink_inode_operations;
532                         inode->i_link = (char *)UFS_I(inode)->i_u1.i_symlink;
533                 } else {
534                         inode->i_op = &ufs_symlink_inode_operations;
535                         inode->i_mapping->a_ops = &ufs_aops;
536                 }
537         } else
538                 init_special_inode(inode, inode->i_mode,
539                                    ufs_get_inode_dev(inode->i_sb, UFS_I(inode)));
540 }
541
542 static int ufs1_read_inode(struct inode *inode, struct ufs_inode *ufs_inode)
543 {
544         struct ufs_inode_info *ufsi = UFS_I(inode);
545         struct super_block *sb = inode->i_sb;
546         umode_t mode;
547
548         /*
549          * Copy data to the in-core inode.
550          */
551         inode->i_mode = mode = fs16_to_cpu(sb, ufs_inode->ui_mode);
552         set_nlink(inode, fs16_to_cpu(sb, ufs_inode->ui_nlink));
553         if (inode->i_nlink == 0) {
554                 ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino);
555                 return -1;
556         }
557
558         /*
559          * Linux now has 32-bit uid and gid, so we can support EFT.
560          */
561         i_uid_write(inode, ufs_get_inode_uid(sb, ufs_inode));
562         i_gid_write(inode, ufs_get_inode_gid(sb, ufs_inode));
563
564         inode->i_size = fs64_to_cpu(sb, ufs_inode->ui_size);
565         inode->i_atime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_atime.tv_sec);
566         inode->i_ctime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_ctime.tv_sec);
567         inode->i_mtime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_mtime.tv_sec);
568         inode->i_mtime.tv_nsec = 0;
569         inode->i_atime.tv_nsec = 0;
570         inode->i_ctime.tv_nsec = 0;
571         inode->i_blocks = fs32_to_cpu(sb, ufs_inode->ui_blocks);
572         inode->i_generation = fs32_to_cpu(sb, ufs_inode->ui_gen);
573         ufsi->i_flags = fs32_to_cpu(sb, ufs_inode->ui_flags);
574         ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow);
575         ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag);
576
577
578         if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) {
579                 memcpy(ufsi->i_u1.i_data, &ufs_inode->ui_u2.ui_addr,
580                        sizeof(ufs_inode->ui_u2.ui_addr));
581         } else {
582                 memcpy(ufsi->i_u1.i_symlink, ufs_inode->ui_u2.ui_symlink,
583                        sizeof(ufs_inode->ui_u2.ui_symlink) - 1);
584                 ufsi->i_u1.i_symlink[sizeof(ufs_inode->ui_u2.ui_symlink) - 1] = 0;
585         }
586         return 0;
587 }
588
589 static int ufs2_read_inode(struct inode *inode, struct ufs2_inode *ufs2_inode)
590 {
591         struct ufs_inode_info *ufsi = UFS_I(inode);
592         struct super_block *sb = inode->i_sb;
593         umode_t mode;
594
595         UFSD("Reading ufs2 inode, ino %lu\n", inode->i_ino);
596         /*
597          * Copy data to the in-core inode.
598          */
599         inode->i_mode = mode = fs16_to_cpu(sb, ufs2_inode->ui_mode);
600         set_nlink(inode, fs16_to_cpu(sb, ufs2_inode->ui_nlink));
601         if (inode->i_nlink == 0) {
602                 ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino);
603                 return -1;
604         }
605
606         /*
607          * Linux now has 32-bit uid and gid, so we can support EFT.
608          */
609         i_uid_write(inode, fs32_to_cpu(sb, ufs2_inode->ui_uid));
610         i_gid_write(inode, fs32_to_cpu(sb, ufs2_inode->ui_gid));
611
612         inode->i_size = fs64_to_cpu(sb, ufs2_inode->ui_size);
613         inode->i_atime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_atime);
614         inode->i_ctime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_ctime);
615         inode->i_mtime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_mtime);
616         inode->i_atime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_atimensec);
617         inode->i_ctime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_ctimensec);
618         inode->i_mtime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_mtimensec);
619         inode->i_blocks = fs64_to_cpu(sb, ufs2_inode->ui_blocks);
620         inode->i_generation = fs32_to_cpu(sb, ufs2_inode->ui_gen);
621         ufsi->i_flags = fs32_to_cpu(sb, ufs2_inode->ui_flags);
622         /*
623         ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow);
624         ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag);
625         */
626
627         if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) {
628                 memcpy(ufsi->i_u1.u2_i_data, &ufs2_inode->ui_u2.ui_addr,
629                        sizeof(ufs2_inode->ui_u2.ui_addr));
630         } else {
631                 memcpy(ufsi->i_u1.i_symlink, ufs2_inode->ui_u2.ui_symlink,
632                        sizeof(ufs2_inode->ui_u2.ui_symlink) - 1);
633                 ufsi->i_u1.i_symlink[sizeof(ufs2_inode->ui_u2.ui_symlink) - 1] = 0;
634         }
635         return 0;
636 }
637
638 struct inode *ufs_iget(struct super_block *sb, unsigned long ino)
639 {
640         struct ufs_inode_info *ufsi;
641         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
642         struct buffer_head * bh;
643         struct inode *inode;
644         int err;
645
646         UFSD("ENTER, ino %lu\n", ino);
647
648         if (ino < UFS_ROOTINO || ino > (uspi->s_ncg * uspi->s_ipg)) {
649                 ufs_warning(sb, "ufs_read_inode", "bad inode number (%lu)\n",
650                             ino);
651                 return ERR_PTR(-EIO);
652         }
653
654         inode = iget_locked(sb, ino);
655         if (!inode)
656                 return ERR_PTR(-ENOMEM);
657         if (!(inode->i_state & I_NEW))
658                 return inode;
659
660         ufsi = UFS_I(inode);
661
662         bh = sb_bread(sb, uspi->s_sbbase + ufs_inotofsba(inode->i_ino));
663         if (!bh) {
664                 ufs_warning(sb, "ufs_read_inode", "unable to read inode %lu\n",
665                             inode->i_ino);
666                 goto bad_inode;
667         }
668         if ((UFS_SB(sb)->s_flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
669                 struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data;
670
671                 err = ufs2_read_inode(inode,
672                                       ufs2_inode + ufs_inotofsbo(inode->i_ino));
673         } else {
674                 struct ufs_inode *ufs_inode = (struct ufs_inode *)bh->b_data;
675
676                 err = ufs1_read_inode(inode,
677                                       ufs_inode + ufs_inotofsbo(inode->i_ino));
678         }
679
680         if (err)
681                 goto bad_inode;
682         inode->i_version++;
683         ufsi->i_lastfrag =
684                 (inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift;
685         ufsi->i_dir_start_lookup = 0;
686         ufsi->i_osync = 0;
687
688         ufs_set_inode_ops(inode);
689
690         brelse(bh);
691
692         UFSD("EXIT\n");
693         unlock_new_inode(inode);
694         return inode;
695
696 bad_inode:
697         iget_failed(inode);
698         return ERR_PTR(-EIO);
699 }
700
701 static void ufs1_update_inode(struct inode *inode, struct ufs_inode *ufs_inode)
702 {
703         struct super_block *sb = inode->i_sb;
704         struct ufs_inode_info *ufsi = UFS_I(inode);
705
706         ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode);
707         ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink);
708
709         ufs_set_inode_uid(sb, ufs_inode, i_uid_read(inode));
710         ufs_set_inode_gid(sb, ufs_inode, i_gid_read(inode));
711
712         ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size);
713         ufs_inode->ui_atime.tv_sec = cpu_to_fs32(sb, inode->i_atime.tv_sec);
714         ufs_inode->ui_atime.tv_usec = 0;
715         ufs_inode->ui_ctime.tv_sec = cpu_to_fs32(sb, inode->i_ctime.tv_sec);
716         ufs_inode->ui_ctime.tv_usec = 0;
717         ufs_inode->ui_mtime.tv_sec = cpu_to_fs32(sb, inode->i_mtime.tv_sec);
718         ufs_inode->ui_mtime.tv_usec = 0;
719         ufs_inode->ui_blocks = cpu_to_fs32(sb, inode->i_blocks);
720         ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags);
721         ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation);
722
723         if ((UFS_SB(sb)->s_flags & UFS_UID_MASK) == UFS_UID_EFT) {
724                 ufs_inode->ui_u3.ui_sun.ui_shadow = cpu_to_fs32(sb, ufsi->i_shadow);
725                 ufs_inode->ui_u3.ui_sun.ui_oeftflag = cpu_to_fs32(sb, ufsi->i_oeftflag);
726         }
727
728         if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
729                 /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */
730                 ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.i_data[0];
731         } else if (inode->i_blocks) {
732                 memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.i_data,
733                        sizeof(ufs_inode->ui_u2.ui_addr));
734         }
735         else {
736                 memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink,
737                        sizeof(ufs_inode->ui_u2.ui_symlink));
738         }
739
740         if (!inode->i_nlink)
741                 memset (ufs_inode, 0, sizeof(struct ufs_inode));
742 }
743
744 static void ufs2_update_inode(struct inode *inode, struct ufs2_inode *ufs_inode)
745 {
746         struct super_block *sb = inode->i_sb;
747         struct ufs_inode_info *ufsi = UFS_I(inode);
748
749         UFSD("ENTER\n");
750         ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode);
751         ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink);
752
753         ufs_inode->ui_uid = cpu_to_fs32(sb, i_uid_read(inode));
754         ufs_inode->ui_gid = cpu_to_fs32(sb, i_gid_read(inode));
755
756         ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size);
757         ufs_inode->ui_atime = cpu_to_fs64(sb, inode->i_atime.tv_sec);
758         ufs_inode->ui_atimensec = cpu_to_fs32(sb, inode->i_atime.tv_nsec);
759         ufs_inode->ui_ctime = cpu_to_fs64(sb, inode->i_ctime.tv_sec);
760         ufs_inode->ui_ctimensec = cpu_to_fs32(sb, inode->i_ctime.tv_nsec);
761         ufs_inode->ui_mtime = cpu_to_fs64(sb, inode->i_mtime.tv_sec);
762         ufs_inode->ui_mtimensec = cpu_to_fs32(sb, inode->i_mtime.tv_nsec);
763
764         ufs_inode->ui_blocks = cpu_to_fs64(sb, inode->i_blocks);
765         ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags);
766         ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation);
767
768         if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
769                 /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */
770                 ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.u2_i_data[0];
771         } else if (inode->i_blocks) {
772                 memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.u2_i_data,
773                        sizeof(ufs_inode->ui_u2.ui_addr));
774         } else {
775                 memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink,
776                        sizeof(ufs_inode->ui_u2.ui_symlink));
777         }
778
779         if (!inode->i_nlink)
780                 memset (ufs_inode, 0, sizeof(struct ufs2_inode));
781         UFSD("EXIT\n");
782 }
783
784 static int ufs_update_inode(struct inode * inode, int do_sync)
785 {
786         struct super_block *sb = inode->i_sb;
787         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
788         struct buffer_head * bh;
789
790         UFSD("ENTER, ino %lu\n", inode->i_ino);
791
792         if (inode->i_ino < UFS_ROOTINO ||
793             inode->i_ino > (uspi->s_ncg * uspi->s_ipg)) {
794                 ufs_warning (sb, "ufs_read_inode", "bad inode number (%lu)\n", inode->i_ino);
795                 return -1;
796         }
797
798         bh = sb_bread(sb, ufs_inotofsba(inode->i_ino));
799         if (!bh) {
800                 ufs_warning (sb, "ufs_read_inode", "unable to read inode %lu\n", inode->i_ino);
801                 return -1;
802         }
803         if (uspi->fs_magic == UFS2_MAGIC) {
804                 struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data;
805
806                 ufs2_update_inode(inode,
807                                   ufs2_inode + ufs_inotofsbo(inode->i_ino));
808         } else {
809                 struct ufs_inode *ufs_inode = (struct ufs_inode *) bh->b_data;
810
811                 ufs1_update_inode(inode, ufs_inode + ufs_inotofsbo(inode->i_ino));
812         }
813
814         mark_buffer_dirty(bh);
815         if (do_sync)
816                 sync_dirty_buffer(bh);
817         brelse (bh);
818
819         UFSD("EXIT\n");
820         return 0;
821 }
822
823 int ufs_write_inode(struct inode *inode, struct writeback_control *wbc)
824 {
825         return ufs_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL);
826 }
827
828 int ufs_sync_inode (struct inode *inode)
829 {
830         return ufs_update_inode (inode, 1);
831 }
832
833 void ufs_evict_inode(struct inode * inode)
834 {
835         int want_delete = 0;
836
837         if (!inode->i_nlink && !is_bad_inode(inode))
838                 want_delete = 1;
839
840         truncate_inode_pages_final(&inode->i_data);
841         if (want_delete) {
842                 inode->i_size = 0;
843                 if (inode->i_blocks)
844                         ufs_truncate_blocks(inode);
845         }
846
847         invalidate_inode_buffers(inode);
848         clear_inode(inode);
849
850         if (want_delete)
851                 ufs_free_inode(inode);
852 }
853
854 struct to_free {
855         struct inode *inode;
856         u64 to;
857         unsigned count;
858 };
859
860 static inline void free_data(struct to_free *ctx, u64 from, unsigned count)
861 {
862         if (ctx->count && ctx->to != from) {
863                 ufs_free_blocks(ctx->inode, ctx->to - ctx->count, ctx->count);
864                 ctx->count = 0;
865         }
866         ctx->count += count;
867         ctx->to = from + count;
868 }
869
870 #define DIRECT_BLOCK ((inode->i_size + uspi->s_bsize - 1) >> uspi->s_bshift)
871 #define DIRECT_FRAGMENT ((inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift)
872
873 static void ufs_trunc_direct(struct inode *inode)
874 {
875         struct ufs_inode_info *ufsi = UFS_I(inode);
876         struct super_block * sb;
877         struct ufs_sb_private_info * uspi;
878         void *p;
879         u64 frag1, frag2, frag3, frag4, block1, block2;
880         struct to_free ctx = {.inode = inode};
881         unsigned i, tmp;
882
883         UFSD("ENTER: ino %lu\n", inode->i_ino);
884
885         sb = inode->i_sb;
886         uspi = UFS_SB(sb)->s_uspi;
887
888         frag1 = DIRECT_FRAGMENT;
889         frag4 = min_t(u64, UFS_NDIR_FRAGMENT, ufsi->i_lastfrag);
890         frag2 = ((frag1 & uspi->s_fpbmask) ? ((frag1 | uspi->s_fpbmask) + 1) : frag1);
891         frag3 = frag4 & ~uspi->s_fpbmask;
892         block1 = block2 = 0;
893         if (frag2 > frag3) {
894                 frag2 = frag4;
895                 frag3 = frag4 = 0;
896         } else if (frag2 < frag3) {
897                 block1 = ufs_fragstoblks (frag2);
898                 block2 = ufs_fragstoblks (frag3);
899         }
900
901         UFSD("ino %lu, frag1 %llu, frag2 %llu, block1 %llu, block2 %llu,"
902              " frag3 %llu, frag4 %llu\n", inode->i_ino,
903              (unsigned long long)frag1, (unsigned long long)frag2,
904              (unsigned long long)block1, (unsigned long long)block2,
905              (unsigned long long)frag3, (unsigned long long)frag4);
906
907         if (frag1 >= frag2)
908                 goto next1;
909
910         /*
911          * Free first free fragments
912          */
913         p = ufs_get_direct_data_ptr(uspi, ufsi, ufs_fragstoblks(frag1));
914         tmp = ufs_data_ptr_to_cpu(sb, p);
915         if (!tmp )
916                 ufs_panic (sb, "ufs_trunc_direct", "internal error");
917         frag2 -= frag1;
918         frag1 = ufs_fragnum (frag1);
919
920         ufs_free_fragments(inode, tmp + frag1, frag2);
921
922 next1:
923         /*
924          * Free whole blocks
925          */
926         for (i = block1 ; i < block2; i++) {
927                 p = ufs_get_direct_data_ptr(uspi, ufsi, i);
928                 tmp = ufs_data_ptr_to_cpu(sb, p);
929                 if (!tmp)
930                         continue;
931                 write_seqlock(&ufsi->meta_lock);
932                 ufs_data_ptr_clear(uspi, p);
933                 write_sequnlock(&ufsi->meta_lock);
934
935                 free_data(&ctx, tmp, uspi->s_fpb);
936         }
937
938         free_data(&ctx, 0, 0);
939
940         if (frag3 >= frag4)
941                 goto next3;
942
943         /*
944          * Free last free fragments
945          */
946         p = ufs_get_direct_data_ptr(uspi, ufsi, ufs_fragstoblks(frag3));
947         tmp = ufs_data_ptr_to_cpu(sb, p);
948         if (!tmp )
949                 ufs_panic(sb, "ufs_truncate_direct", "internal error");
950         frag4 = ufs_fragnum (frag4);
951         write_seqlock(&ufsi->meta_lock);
952         ufs_data_ptr_clear(uspi, p);
953         write_sequnlock(&ufsi->meta_lock);
954
955         ufs_free_fragments (inode, tmp, frag4);
956  next3:
957
958         UFSD("EXIT: ino %lu\n", inode->i_ino);
959 }
960
961 static void free_full_branch(struct inode *inode, u64 ind_block, int depth)
962 {
963         struct super_block *sb = inode->i_sb;
964         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
965         struct ufs_buffer_head *ubh = ubh_bread(sb, ind_block, uspi->s_bsize);
966         unsigned i;
967
968         if (!ubh)
969                 return;
970
971         if (--depth) {
972                 for (i = 0; i < uspi->s_apb; i++) {
973                         void *p = ubh_get_data_ptr(uspi, ubh, i);
974                         u64 block = ufs_data_ptr_to_cpu(sb, p);
975                         if (block)
976                                 free_full_branch(inode, block, depth);
977                 }
978         } else {
979                 struct to_free ctx = {.inode = inode};
980
981                 for (i = 0; i < uspi->s_apb; i++) {
982                         void *p = ubh_get_data_ptr(uspi, ubh, i);
983                         u64 block = ufs_data_ptr_to_cpu(sb, p);
984                         if (block)
985                                 free_data(&ctx, block, uspi->s_fpb);
986                 }
987                 free_data(&ctx, 0, 0);
988         }
989
990         ubh_bforget(ubh);
991         ufs_free_blocks(inode, ind_block, uspi->s_fpb);
992 }
993
994 static void free_branch_tail(struct inode *inode, unsigned from, struct ufs_buffer_head *ubh, int depth)
995 {
996         struct super_block *sb = inode->i_sb;
997         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
998         unsigned i;
999
1000         if (--depth) {
1001                 for (i = from; i < uspi->s_apb ; i++) {
1002                         void *p = ubh_get_data_ptr(uspi, ubh, i);
1003                         u64 block = ufs_data_ptr_to_cpu(sb, p);
1004                         if (block) {
1005                                 write_seqlock(&UFS_I(inode)->meta_lock);
1006                                 ufs_data_ptr_clear(uspi, p);
1007                                 write_sequnlock(&UFS_I(inode)->meta_lock);
1008                                 ubh_mark_buffer_dirty(ubh);
1009                                 free_full_branch(inode, block, depth);
1010                         }
1011                 }
1012         } else {
1013                 struct to_free ctx = {.inode = inode};
1014
1015                 for (i = from; i < uspi->s_apb; i++) {
1016                         void *p = ubh_get_data_ptr(uspi, ubh, i);
1017                         u64 block = ufs_data_ptr_to_cpu(sb, p);
1018                         if (block) {
1019                                 write_seqlock(&UFS_I(inode)->meta_lock);
1020                                 ufs_data_ptr_clear(uspi, p);
1021                                 write_sequnlock(&UFS_I(inode)->meta_lock);
1022                                 ubh_mark_buffer_dirty(ubh);
1023                                 free_data(&ctx, block, uspi->s_fpb);
1024                         }
1025                 }
1026                 free_data(&ctx, 0, 0);
1027         }
1028         if (IS_SYNC(inode) && ubh_buffer_dirty(ubh))
1029                 ubh_sync_block(ubh);
1030         ubh_brelse(ubh);
1031 }
1032
1033 static int ufs_alloc_lastblock(struct inode *inode, loff_t size)
1034 {
1035         int err = 0;
1036         struct super_block *sb = inode->i_sb;
1037         struct address_space *mapping = inode->i_mapping;
1038         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
1039         unsigned i, end;
1040         sector_t lastfrag;
1041         struct page *lastpage;
1042         struct buffer_head *bh;
1043         u64 phys64;
1044
1045         lastfrag = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
1046
1047         if (!lastfrag)
1048                 goto out;
1049
1050         lastfrag--;
1051
1052         lastpage = ufs_get_locked_page(mapping, lastfrag >>
1053                                        (PAGE_CACHE_SHIFT - inode->i_blkbits));
1054        if (IS_ERR(lastpage)) {
1055                err = -EIO;
1056                goto out;
1057        }
1058
1059        end = lastfrag & ((1 << (PAGE_CACHE_SHIFT - inode->i_blkbits)) - 1);
1060        bh = page_buffers(lastpage);
1061        for (i = 0; i < end; ++i)
1062                bh = bh->b_this_page;
1063
1064
1065        err = ufs_getfrag_block(inode, lastfrag, bh, 1);
1066
1067        if (unlikely(err))
1068                goto out_unlock;
1069
1070        if (buffer_new(bh)) {
1071                clear_buffer_new(bh);
1072                unmap_underlying_metadata(bh->b_bdev,
1073                                          bh->b_blocknr);
1074                /*
1075                 * we do not zeroize fragment, because of
1076                 * if it maped to hole, it already contains zeroes
1077                 */
1078                set_buffer_uptodate(bh);
1079                mark_buffer_dirty(bh);
1080                set_page_dirty(lastpage);
1081        }
1082
1083        if (lastfrag >= UFS_IND_FRAGMENT) {
1084                end = uspi->s_fpb - ufs_fragnum(lastfrag) - 1;
1085                phys64 = bh->b_blocknr + 1;
1086                for (i = 0; i < end; ++i) {
1087                        bh = sb_getblk(sb, i + phys64);
1088                        lock_buffer(bh);
1089                        memset(bh->b_data, 0, sb->s_blocksize);
1090                        set_buffer_uptodate(bh);
1091                        mark_buffer_dirty(bh);
1092                        unlock_buffer(bh);
1093                        sync_dirty_buffer(bh);
1094                        brelse(bh);
1095                }
1096        }
1097 out_unlock:
1098        ufs_put_locked_page(lastpage);
1099 out:
1100        return err;
1101 }
1102
1103 static void __ufs_truncate_blocks(struct inode *inode)
1104 {
1105         struct ufs_inode_info *ufsi = UFS_I(inode);
1106         struct super_block *sb = inode->i_sb;
1107         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
1108         unsigned offsets[4];
1109         int depth = ufs_block_to_path(inode, DIRECT_BLOCK, offsets);
1110         int depth2;
1111         unsigned i;
1112         struct ufs_buffer_head *ubh[3];
1113         void *p;
1114         u64 block;
1115
1116         if (!depth)
1117                 return;
1118
1119         /* find the last non-zero in offsets[] */
1120         for (depth2 = depth - 1; depth2; depth2--)
1121                 if (offsets[depth2])
1122                         break;
1123
1124         mutex_lock(&ufsi->truncate_mutex);
1125         if (depth == 1) {
1126                 ufs_trunc_direct(inode);
1127                 offsets[0] = UFS_IND_BLOCK;
1128         } else {
1129                 /* get the blocks that should be partially emptied */
1130                 p = ufs_get_direct_data_ptr(uspi, ufsi, offsets[0]);
1131                 for (i = 0; i < depth2; i++) {
1132                         offsets[i]++;   /* next branch is fully freed */
1133                         block = ufs_data_ptr_to_cpu(sb, p);
1134                         if (!block)
1135                                 break;
1136                         ubh[i] = ubh_bread(sb, block, uspi->s_bsize);
1137                         if (!ubh[i]) {
1138                                 write_seqlock(&ufsi->meta_lock);
1139                                 ufs_data_ptr_clear(uspi, p);
1140                                 write_sequnlock(&ufsi->meta_lock);
1141                                 break;
1142                         }
1143                         p = ubh_get_data_ptr(uspi, ubh[i], offsets[i + 1]);
1144                 }
1145                 while (i--)
1146                         free_branch_tail(inode, offsets[i + 1], ubh[i], depth - i - 1);
1147         }
1148         for (i = offsets[0]; i <= UFS_TIND_BLOCK; i++) {
1149                 p = ufs_get_direct_data_ptr(uspi, ufsi, i);
1150                 block = ufs_data_ptr_to_cpu(sb, p);
1151                 if (block) {
1152                         write_seqlock(&ufsi->meta_lock);
1153                         ufs_data_ptr_clear(uspi, p);
1154                         write_sequnlock(&ufsi->meta_lock);
1155                         free_full_branch(inode, block, i - UFS_IND_BLOCK + 1);
1156                 }
1157         }
1158         ufsi->i_lastfrag = DIRECT_FRAGMENT;
1159         mark_inode_dirty(inode);
1160         mutex_unlock(&ufsi->truncate_mutex);
1161 }
1162
1163 static int ufs_truncate(struct inode *inode, loff_t size)
1164 {
1165         int err = 0;
1166
1167         UFSD("ENTER: ino %lu, i_size: %llu, old_i_size: %llu\n",
1168              inode->i_ino, (unsigned long long)size,
1169              (unsigned long long)i_size_read(inode));
1170
1171         if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
1172               S_ISLNK(inode->i_mode)))
1173                 return -EINVAL;
1174         if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
1175                 return -EPERM;
1176
1177         err = ufs_alloc_lastblock(inode, size);
1178
1179         if (err)
1180                 goto out;
1181
1182         block_truncate_page(inode->i_mapping, size, ufs_getfrag_block);
1183
1184         truncate_setsize(inode, size);
1185
1186         __ufs_truncate_blocks(inode);
1187         inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC;
1188         mark_inode_dirty(inode);
1189 out:
1190         UFSD("EXIT: err %d\n", err);
1191         return err;
1192 }
1193
1194 void ufs_truncate_blocks(struct inode *inode)
1195 {
1196         if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
1197               S_ISLNK(inode->i_mode)))
1198                 return;
1199         if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
1200                 return;
1201         __ufs_truncate_blocks(inode);
1202 }
1203
1204 int ufs_setattr(struct dentry *dentry, struct iattr *attr)
1205 {
1206         struct inode *inode = d_inode(dentry);
1207         unsigned int ia_valid = attr->ia_valid;
1208         int error;
1209
1210         error = inode_change_ok(inode, attr);
1211         if (error)
1212                 return error;
1213
1214         if (ia_valid & ATTR_SIZE && attr->ia_size != inode->i_size) {
1215                 error = ufs_truncate(inode, attr->ia_size);
1216                 if (error)
1217                         return error;
1218         }
1219
1220         setattr_copy(inode, attr);
1221         mark_inode_dirty(inode);
1222         return 0;
1223 }
1224
1225 const struct inode_operations ufs_file_inode_operations = {
1226         .setattr = ufs_setattr,
1227 };