fs: Add helper to clean bdev aliases under a bh and use it
[sfrench/cifs-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
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(inode);
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(inode);
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_link = (char *)UFS_I(inode)->i_u1.i_symlink;
532                         inode->i_op = &simple_symlink_inode_operations;
533                 } else {
534                         inode->i_mapping->a_ops = &ufs_aops;
535                         inode->i_op = &page_symlink_inode_operations;
536                         inode_nohighmem(inode);
537                 }
538         } else
539                 init_special_inode(inode, inode->i_mode,
540                                    ufs_get_inode_dev(inode->i_sb, UFS_I(inode)));
541 }
542
543 static int ufs1_read_inode(struct inode *inode, struct ufs_inode *ufs_inode)
544 {
545         struct ufs_inode_info *ufsi = UFS_I(inode);
546         struct super_block *sb = inode->i_sb;
547         umode_t mode;
548
549         /*
550          * Copy data to the in-core inode.
551          */
552         inode->i_mode = mode = fs16_to_cpu(sb, ufs_inode->ui_mode);
553         set_nlink(inode, fs16_to_cpu(sb, ufs_inode->ui_nlink));
554         if (inode->i_nlink == 0) {
555                 ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino);
556                 return -1;
557         }
558
559         /*
560          * Linux now has 32-bit uid and gid, so we can support EFT.
561          */
562         i_uid_write(inode, ufs_get_inode_uid(sb, ufs_inode));
563         i_gid_write(inode, ufs_get_inode_gid(sb, ufs_inode));
564
565         inode->i_size = fs64_to_cpu(sb, ufs_inode->ui_size);
566         inode->i_atime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_atime.tv_sec);
567         inode->i_ctime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_ctime.tv_sec);
568         inode->i_mtime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_mtime.tv_sec);
569         inode->i_mtime.tv_nsec = 0;
570         inode->i_atime.tv_nsec = 0;
571         inode->i_ctime.tv_nsec = 0;
572         inode->i_blocks = fs32_to_cpu(sb, ufs_inode->ui_blocks);
573         inode->i_generation = fs32_to_cpu(sb, ufs_inode->ui_gen);
574         ufsi->i_flags = fs32_to_cpu(sb, ufs_inode->ui_flags);
575         ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow);
576         ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag);
577
578
579         if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) {
580                 memcpy(ufsi->i_u1.i_data, &ufs_inode->ui_u2.ui_addr,
581                        sizeof(ufs_inode->ui_u2.ui_addr));
582         } else {
583                 memcpy(ufsi->i_u1.i_symlink, ufs_inode->ui_u2.ui_symlink,
584                        sizeof(ufs_inode->ui_u2.ui_symlink) - 1);
585                 ufsi->i_u1.i_symlink[sizeof(ufs_inode->ui_u2.ui_symlink) - 1] = 0;
586         }
587         return 0;
588 }
589
590 static int ufs2_read_inode(struct inode *inode, struct ufs2_inode *ufs2_inode)
591 {
592         struct ufs_inode_info *ufsi = UFS_I(inode);
593         struct super_block *sb = inode->i_sb;
594         umode_t mode;
595
596         UFSD("Reading ufs2 inode, ino %lu\n", inode->i_ino);
597         /*
598          * Copy data to the in-core inode.
599          */
600         inode->i_mode = mode = fs16_to_cpu(sb, ufs2_inode->ui_mode);
601         set_nlink(inode, fs16_to_cpu(sb, ufs2_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                 return -1;
605         }
606
607         /*
608          * Linux now has 32-bit uid and gid, so we can support EFT.
609          */
610         i_uid_write(inode, fs32_to_cpu(sb, ufs2_inode->ui_uid));
611         i_gid_write(inode, fs32_to_cpu(sb, ufs2_inode->ui_gid));
612
613         inode->i_size = fs64_to_cpu(sb, ufs2_inode->ui_size);
614         inode->i_atime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_atime);
615         inode->i_ctime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_ctime);
616         inode->i_mtime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_mtime);
617         inode->i_atime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_atimensec);
618         inode->i_ctime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_ctimensec);
619         inode->i_mtime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_mtimensec);
620         inode->i_blocks = fs64_to_cpu(sb, ufs2_inode->ui_blocks);
621         inode->i_generation = fs32_to_cpu(sb, ufs2_inode->ui_gen);
622         ufsi->i_flags = fs32_to_cpu(sb, ufs2_inode->ui_flags);
623         /*
624         ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow);
625         ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag);
626         */
627
628         if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) {
629                 memcpy(ufsi->i_u1.u2_i_data, &ufs2_inode->ui_u2.ui_addr,
630                        sizeof(ufs2_inode->ui_u2.ui_addr));
631         } else {
632                 memcpy(ufsi->i_u1.i_symlink, ufs2_inode->ui_u2.ui_symlink,
633                        sizeof(ufs2_inode->ui_u2.ui_symlink) - 1);
634                 ufsi->i_u1.i_symlink[sizeof(ufs2_inode->ui_u2.ui_symlink) - 1] = 0;
635         }
636         return 0;
637 }
638
639 struct inode *ufs_iget(struct super_block *sb, unsigned long ino)
640 {
641         struct ufs_inode_info *ufsi;
642         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
643         struct buffer_head * bh;
644         struct inode *inode;
645         int err;
646
647         UFSD("ENTER, ino %lu\n", ino);
648
649         if (ino < UFS_ROOTINO || ino > (uspi->s_ncg * uspi->s_ipg)) {
650                 ufs_warning(sb, "ufs_read_inode", "bad inode number (%lu)\n",
651                             ino);
652                 return ERR_PTR(-EIO);
653         }
654
655         inode = iget_locked(sb, ino);
656         if (!inode)
657                 return ERR_PTR(-ENOMEM);
658         if (!(inode->i_state & I_NEW))
659                 return inode;
660
661         ufsi = UFS_I(inode);
662
663         bh = sb_bread(sb, uspi->s_sbbase + ufs_inotofsba(inode->i_ino));
664         if (!bh) {
665                 ufs_warning(sb, "ufs_read_inode", "unable to read inode %lu\n",
666                             inode->i_ino);
667                 goto bad_inode;
668         }
669         if ((UFS_SB(sb)->s_flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
670                 struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data;
671
672                 err = ufs2_read_inode(inode,
673                                       ufs2_inode + ufs_inotofsbo(inode->i_ino));
674         } else {
675                 struct ufs_inode *ufs_inode = (struct ufs_inode *)bh->b_data;
676
677                 err = ufs1_read_inode(inode,
678                                       ufs_inode + ufs_inotofsbo(inode->i_ino));
679         }
680
681         if (err)
682                 goto bad_inode;
683         inode->i_version++;
684         ufsi->i_lastfrag =
685                 (inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift;
686         ufsi->i_dir_start_lookup = 0;
687         ufsi->i_osync = 0;
688
689         ufs_set_inode_ops(inode);
690
691         brelse(bh);
692
693         UFSD("EXIT\n");
694         unlock_new_inode(inode);
695         return inode;
696
697 bad_inode:
698         iget_failed(inode);
699         return ERR_PTR(-EIO);
700 }
701
702 static void ufs1_update_inode(struct inode *inode, struct ufs_inode *ufs_inode)
703 {
704         struct super_block *sb = inode->i_sb;
705         struct ufs_inode_info *ufsi = UFS_I(inode);
706
707         ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode);
708         ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink);
709
710         ufs_set_inode_uid(sb, ufs_inode, i_uid_read(inode));
711         ufs_set_inode_gid(sb, ufs_inode, i_gid_read(inode));
712
713         ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size);
714         ufs_inode->ui_atime.tv_sec = cpu_to_fs32(sb, inode->i_atime.tv_sec);
715         ufs_inode->ui_atime.tv_usec = 0;
716         ufs_inode->ui_ctime.tv_sec = cpu_to_fs32(sb, inode->i_ctime.tv_sec);
717         ufs_inode->ui_ctime.tv_usec = 0;
718         ufs_inode->ui_mtime.tv_sec = cpu_to_fs32(sb, inode->i_mtime.tv_sec);
719         ufs_inode->ui_mtime.tv_usec = 0;
720         ufs_inode->ui_blocks = cpu_to_fs32(sb, inode->i_blocks);
721         ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags);
722         ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation);
723
724         if ((UFS_SB(sb)->s_flags & UFS_UID_MASK) == UFS_UID_EFT) {
725                 ufs_inode->ui_u3.ui_sun.ui_shadow = cpu_to_fs32(sb, ufsi->i_shadow);
726                 ufs_inode->ui_u3.ui_sun.ui_oeftflag = cpu_to_fs32(sb, ufsi->i_oeftflag);
727         }
728
729         if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
730                 /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */
731                 ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.i_data[0];
732         } else if (inode->i_blocks) {
733                 memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.i_data,
734                        sizeof(ufs_inode->ui_u2.ui_addr));
735         }
736         else {
737                 memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink,
738                        sizeof(ufs_inode->ui_u2.ui_symlink));
739         }
740
741         if (!inode->i_nlink)
742                 memset (ufs_inode, 0, sizeof(struct ufs_inode));
743 }
744
745 static void ufs2_update_inode(struct inode *inode, struct ufs2_inode *ufs_inode)
746 {
747         struct super_block *sb = inode->i_sb;
748         struct ufs_inode_info *ufsi = UFS_I(inode);
749
750         UFSD("ENTER\n");
751         ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode);
752         ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink);
753
754         ufs_inode->ui_uid = cpu_to_fs32(sb, i_uid_read(inode));
755         ufs_inode->ui_gid = cpu_to_fs32(sb, i_gid_read(inode));
756
757         ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size);
758         ufs_inode->ui_atime = cpu_to_fs64(sb, inode->i_atime.tv_sec);
759         ufs_inode->ui_atimensec = cpu_to_fs32(sb, inode->i_atime.tv_nsec);
760         ufs_inode->ui_ctime = cpu_to_fs64(sb, inode->i_ctime.tv_sec);
761         ufs_inode->ui_ctimensec = cpu_to_fs32(sb, inode->i_ctime.tv_nsec);
762         ufs_inode->ui_mtime = cpu_to_fs64(sb, inode->i_mtime.tv_sec);
763         ufs_inode->ui_mtimensec = cpu_to_fs32(sb, inode->i_mtime.tv_nsec);
764
765         ufs_inode->ui_blocks = cpu_to_fs64(sb, inode->i_blocks);
766         ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags);
767         ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation);
768
769         if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
770                 /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */
771                 ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.u2_i_data[0];
772         } else if (inode->i_blocks) {
773                 memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.u2_i_data,
774                        sizeof(ufs_inode->ui_u2.ui_addr));
775         } else {
776                 memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink,
777                        sizeof(ufs_inode->ui_u2.ui_symlink));
778         }
779
780         if (!inode->i_nlink)
781                 memset (ufs_inode, 0, sizeof(struct ufs2_inode));
782         UFSD("EXIT\n");
783 }
784
785 static int ufs_update_inode(struct inode * inode, int do_sync)
786 {
787         struct super_block *sb = inode->i_sb;
788         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
789         struct buffer_head * bh;
790
791         UFSD("ENTER, ino %lu\n", inode->i_ino);
792
793         if (inode->i_ino < UFS_ROOTINO ||
794             inode->i_ino > (uspi->s_ncg * uspi->s_ipg)) {
795                 ufs_warning (sb, "ufs_read_inode", "bad inode number (%lu)\n", inode->i_ino);
796                 return -1;
797         }
798
799         bh = sb_bread(sb, ufs_inotofsba(inode->i_ino));
800         if (!bh) {
801                 ufs_warning (sb, "ufs_read_inode", "unable to read inode %lu\n", inode->i_ino);
802                 return -1;
803         }
804         if (uspi->fs_magic == UFS2_MAGIC) {
805                 struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data;
806
807                 ufs2_update_inode(inode,
808                                   ufs2_inode + ufs_inotofsbo(inode->i_ino));
809         } else {
810                 struct ufs_inode *ufs_inode = (struct ufs_inode *) bh->b_data;
811
812                 ufs1_update_inode(inode, ufs_inode + ufs_inotofsbo(inode->i_ino));
813         }
814
815         mark_buffer_dirty(bh);
816         if (do_sync)
817                 sync_dirty_buffer(bh);
818         brelse (bh);
819
820         UFSD("EXIT\n");
821         return 0;
822 }
823
824 int ufs_write_inode(struct inode *inode, struct writeback_control *wbc)
825 {
826         return ufs_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL);
827 }
828
829 int ufs_sync_inode (struct inode *inode)
830 {
831         return ufs_update_inode (inode, 1);
832 }
833
834 void ufs_evict_inode(struct inode * inode)
835 {
836         int want_delete = 0;
837
838         if (!inode->i_nlink && !is_bad_inode(inode))
839                 want_delete = 1;
840
841         truncate_inode_pages_final(&inode->i_data);
842         if (want_delete) {
843                 inode->i_size = 0;
844                 if (inode->i_blocks)
845                         ufs_truncate_blocks(inode);
846         }
847
848         invalidate_inode_buffers(inode);
849         clear_inode(inode);
850
851         if (want_delete)
852                 ufs_free_inode(inode);
853 }
854
855 struct to_free {
856         struct inode *inode;
857         u64 to;
858         unsigned count;
859 };
860
861 static inline void free_data(struct to_free *ctx, u64 from, unsigned count)
862 {
863         if (ctx->count && ctx->to != from) {
864                 ufs_free_blocks(ctx->inode, ctx->to - ctx->count, ctx->count);
865                 ctx->count = 0;
866         }
867         ctx->count += count;
868         ctx->to = from + count;
869 }
870
871 #define DIRECT_BLOCK ((inode->i_size + uspi->s_bsize - 1) >> uspi->s_bshift)
872 #define DIRECT_FRAGMENT ((inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift)
873
874 static void ufs_trunc_direct(struct inode *inode)
875 {
876         struct ufs_inode_info *ufsi = UFS_I(inode);
877         struct super_block * sb;
878         struct ufs_sb_private_info * uspi;
879         void *p;
880         u64 frag1, frag2, frag3, frag4, block1, block2;
881         struct to_free ctx = {.inode = inode};
882         unsigned i, tmp;
883
884         UFSD("ENTER: ino %lu\n", inode->i_ino);
885
886         sb = inode->i_sb;
887         uspi = UFS_SB(sb)->s_uspi;
888
889         frag1 = DIRECT_FRAGMENT;
890         frag4 = min_t(u64, UFS_NDIR_FRAGMENT, ufsi->i_lastfrag);
891         frag2 = ((frag1 & uspi->s_fpbmask) ? ((frag1 | uspi->s_fpbmask) + 1) : frag1);
892         frag3 = frag4 & ~uspi->s_fpbmask;
893         block1 = block2 = 0;
894         if (frag2 > frag3) {
895                 frag2 = frag4;
896                 frag3 = frag4 = 0;
897         } else if (frag2 < frag3) {
898                 block1 = ufs_fragstoblks (frag2);
899                 block2 = ufs_fragstoblks (frag3);
900         }
901
902         UFSD("ino %lu, frag1 %llu, frag2 %llu, block1 %llu, block2 %llu,"
903              " frag3 %llu, frag4 %llu\n", inode->i_ino,
904              (unsigned long long)frag1, (unsigned long long)frag2,
905              (unsigned long long)block1, (unsigned long long)block2,
906              (unsigned long long)frag3, (unsigned long long)frag4);
907
908         if (frag1 >= frag2)
909                 goto next1;
910
911         /*
912          * Free first free fragments
913          */
914         p = ufs_get_direct_data_ptr(uspi, ufsi, ufs_fragstoblks(frag1));
915         tmp = ufs_data_ptr_to_cpu(sb, p);
916         if (!tmp )
917                 ufs_panic (sb, "ufs_trunc_direct", "internal error");
918         frag2 -= frag1;
919         frag1 = ufs_fragnum (frag1);
920
921         ufs_free_fragments(inode, tmp + frag1, frag2);
922
923 next1:
924         /*
925          * Free whole blocks
926          */
927         for (i = block1 ; i < block2; i++) {
928                 p = ufs_get_direct_data_ptr(uspi, ufsi, i);
929                 tmp = ufs_data_ptr_to_cpu(sb, p);
930                 if (!tmp)
931                         continue;
932                 write_seqlock(&ufsi->meta_lock);
933                 ufs_data_ptr_clear(uspi, p);
934                 write_sequnlock(&ufsi->meta_lock);
935
936                 free_data(&ctx, tmp, uspi->s_fpb);
937         }
938
939         free_data(&ctx, 0, 0);
940
941         if (frag3 >= frag4)
942                 goto next3;
943
944         /*
945          * Free last free fragments
946          */
947         p = ufs_get_direct_data_ptr(uspi, ufsi, ufs_fragstoblks(frag3));
948         tmp = ufs_data_ptr_to_cpu(sb, p);
949         if (!tmp )
950                 ufs_panic(sb, "ufs_truncate_direct", "internal error");
951         frag4 = ufs_fragnum (frag4);
952         write_seqlock(&ufsi->meta_lock);
953         ufs_data_ptr_clear(uspi, p);
954         write_sequnlock(&ufsi->meta_lock);
955
956         ufs_free_fragments (inode, tmp, frag4);
957  next3:
958
959         UFSD("EXIT: ino %lu\n", inode->i_ino);
960 }
961
962 static void free_full_branch(struct inode *inode, u64 ind_block, int depth)
963 {
964         struct super_block *sb = inode->i_sb;
965         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
966         struct ufs_buffer_head *ubh = ubh_bread(sb, ind_block, uspi->s_bsize);
967         unsigned i;
968
969         if (!ubh)
970                 return;
971
972         if (--depth) {
973                 for (i = 0; i < uspi->s_apb; i++) {
974                         void *p = ubh_get_data_ptr(uspi, ubh, i);
975                         u64 block = ufs_data_ptr_to_cpu(sb, p);
976                         if (block)
977                                 free_full_branch(inode, block, depth);
978                 }
979         } else {
980                 struct to_free ctx = {.inode = inode};
981
982                 for (i = 0; i < uspi->s_apb; i++) {
983                         void *p = ubh_get_data_ptr(uspi, ubh, i);
984                         u64 block = ufs_data_ptr_to_cpu(sb, p);
985                         if (block)
986                                 free_data(&ctx, block, uspi->s_fpb);
987                 }
988                 free_data(&ctx, 0, 0);
989         }
990
991         ubh_bforget(ubh);
992         ufs_free_blocks(inode, ind_block, uspi->s_fpb);
993 }
994
995 static void free_branch_tail(struct inode *inode, unsigned from, struct ufs_buffer_head *ubh, int depth)
996 {
997         struct super_block *sb = inode->i_sb;
998         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
999         unsigned i;
1000
1001         if (--depth) {
1002                 for (i = from; i < uspi->s_apb ; i++) {
1003                         void *p = ubh_get_data_ptr(uspi, ubh, i);
1004                         u64 block = ufs_data_ptr_to_cpu(sb, p);
1005                         if (block) {
1006                                 write_seqlock(&UFS_I(inode)->meta_lock);
1007                                 ufs_data_ptr_clear(uspi, p);
1008                                 write_sequnlock(&UFS_I(inode)->meta_lock);
1009                                 ubh_mark_buffer_dirty(ubh);
1010                                 free_full_branch(inode, block, depth);
1011                         }
1012                 }
1013         } else {
1014                 struct to_free ctx = {.inode = inode};
1015
1016                 for (i = from; i < uspi->s_apb; i++) {
1017                         void *p = ubh_get_data_ptr(uspi, ubh, i);
1018                         u64 block = ufs_data_ptr_to_cpu(sb, p);
1019                         if (block) {
1020                                 write_seqlock(&UFS_I(inode)->meta_lock);
1021                                 ufs_data_ptr_clear(uspi, p);
1022                                 write_sequnlock(&UFS_I(inode)->meta_lock);
1023                                 ubh_mark_buffer_dirty(ubh);
1024                                 free_data(&ctx, block, uspi->s_fpb);
1025                         }
1026                 }
1027                 free_data(&ctx, 0, 0);
1028         }
1029         if (IS_SYNC(inode) && ubh_buffer_dirty(ubh))
1030                 ubh_sync_block(ubh);
1031         ubh_brelse(ubh);
1032 }
1033
1034 static int ufs_alloc_lastblock(struct inode *inode, loff_t size)
1035 {
1036         int err = 0;
1037         struct super_block *sb = inode->i_sb;
1038         struct address_space *mapping = inode->i_mapping;
1039         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
1040         unsigned i, end;
1041         sector_t lastfrag;
1042         struct page *lastpage;
1043         struct buffer_head *bh;
1044         u64 phys64;
1045
1046         lastfrag = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
1047
1048         if (!lastfrag)
1049                 goto out;
1050
1051         lastfrag--;
1052
1053         lastpage = ufs_get_locked_page(mapping, lastfrag >>
1054                                        (PAGE_SHIFT - inode->i_blkbits));
1055        if (IS_ERR(lastpage)) {
1056                err = -EIO;
1057                goto out;
1058        }
1059
1060        end = lastfrag & ((1 << (PAGE_SHIFT - inode->i_blkbits)) - 1);
1061        bh = page_buffers(lastpage);
1062        for (i = 0; i < end; ++i)
1063                bh = bh->b_this_page;
1064
1065
1066        err = ufs_getfrag_block(inode, lastfrag, bh, 1);
1067
1068        if (unlikely(err))
1069                goto out_unlock;
1070
1071        if (buffer_new(bh)) {
1072                clear_buffer_new(bh);
1073                clean_bdev_bh_alias(bh);
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(inode);
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 = setattr_prepare(dentry, 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 };