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Linux/fs/ufs/inode.c

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  1 // SPDX-License-Identifier: GPL-2.0
  2 /*
  3  *  linux/fs/ufs/inode.c
  4  *
  5  * Copyright (C) 1998
  6  * Daniel Pirkl <daniel.pirkl@email.cz>
  7  * Charles University, Faculty of Mathematics and Physics
  8  *
  9  *  from
 10  *
 11  *  linux/fs/ext2/inode.c
 12  *
 13  * Copyright (C) 1992, 1993, 1994, 1995
 14  * Remy Card (card@masi.ibp.fr)
 15  * Laboratoire MASI - Institut Blaise Pascal
 16  * Universite Pierre et Marie Curie (Paris VI)
 17  *
 18  *  from
 19  *
 20  *  linux/fs/minix/inode.c
 21  *
 22  *  Copyright (C) 1991, 1992  Linus Torvalds
 23  *
 24  *  Goal-directed block allocation by Stephen Tweedie (sct@dcs.ed.ac.uk), 1993
 25  *  Big-endian to little-endian byte-swapping/bitmaps by
 26  *        David S. Miller (davem@caip.rutgers.edu), 1995
 27  */
 28 
 29 #include <linux/uaccess.h>
 30 
 31 #include <linux/errno.h>
 32 #include <linux/fs.h>
 33 #include <linux/time.h>
 34 #include <linux/stat.h>
 35 #include <linux/string.h>
 36 #include <linux/mm.h>
 37 #include <linux/buffer_head.h>
 38 #include <linux/writeback.h>
 39 #include <linux/iversion.h>
 40 
 41 #include "ufs_fs.h"
 42 #include "ufs.h"
 43 #include "swab.h"
 44 #include "util.h"
 45 
 46 static int ufs_block_to_path(struct inode *inode, sector_t i_block, unsigned offsets[4])
 47 {
 48         struct ufs_sb_private_info *uspi = UFS_SB(inode->i_sb)->s_uspi;
 49         int ptrs = uspi->s_apb;
 50         int ptrs_bits = uspi->s_apbshift;
 51         const long direct_blocks = UFS_NDADDR,
 52                 indirect_blocks = ptrs,
 53                 double_blocks = (1 << (ptrs_bits * 2));
 54         int n = 0;
 55 
 56 
 57         UFSD("ptrs=uspi->s_apb = %d,double_blocks=%ld \n",ptrs,double_blocks);
 58         if (i_block < direct_blocks) {
 59                 offsets[n++] = i_block;
 60         } else if ((i_block -= direct_blocks) < indirect_blocks) {
 61                 offsets[n++] = UFS_IND_BLOCK;
 62                 offsets[n++] = i_block;
 63         } else if ((i_block -= indirect_blocks) < double_blocks) {
 64                 offsets[n++] = UFS_DIND_BLOCK;
 65                 offsets[n++] = i_block >> ptrs_bits;
 66                 offsets[n++] = i_block & (ptrs - 1);
 67         } else if (((i_block -= double_blocks) >> (ptrs_bits * 2)) < ptrs) {
 68                 offsets[n++] = UFS_TIND_BLOCK;
 69                 offsets[n++] = i_block >> (ptrs_bits * 2);
 70                 offsets[n++] = (i_block >> ptrs_bits) & (ptrs - 1);
 71                 offsets[n++] = i_block & (ptrs - 1);
 72         } else {
 73                 ufs_warning(inode->i_sb, "ufs_block_to_path", "block > big");
 74         }
 75         return n;
 76 }
 77 
 78 typedef struct {
 79         void    *p;
 80         union {
 81                 __fs32  key32;
 82                 __fs64  key64;
 83         };
 84         struct buffer_head *bh;
 85 } Indirect;
 86 
 87 static inline int grow_chain32(struct ufs_inode_info *ufsi,
 88                                struct buffer_head *bh, __fs32 *v,
 89                                Indirect *from, Indirect *to)
 90 {
 91         Indirect *p;
 92         unsigned seq;
 93         to->bh = bh;
 94         do {
 95                 seq = read_seqbegin(&ufsi->meta_lock);
 96                 to->key32 = *(__fs32 *)(to->p = v);
 97                 for (p = from; p <= to && p->key32 == *(__fs32 *)p->p; p++)
 98                         ;
 99         } while (read_seqretry(&ufsi->meta_lock, seq));
100         return (p > to);
101 }
102 
103 static inline int grow_chain64(struct ufs_inode_info *ufsi,
104                                struct buffer_head *bh, __fs64 *v,
105                                Indirect *from, Indirect *to)
106 {
107         Indirect *p;
108         unsigned seq;
109         to->bh = bh;
110         do {
111                 seq = read_seqbegin(&ufsi->meta_lock);
112                 to->key64 = *(__fs64 *)(to->p = v);
113                 for (p = from; p <= to && p->key64 == *(__fs64 *)p->p; p++)
114                         ;
115         } while (read_seqretry(&ufsi->meta_lock, seq));
116         return (p > to);
117 }
118 
119 /*
120  * Returns the location of the fragment from
121  * the beginning of the filesystem.
122  */
123 
124 static u64 ufs_frag_map(struct inode *inode, unsigned offsets[4], int depth)
125 {
126         struct ufs_inode_info *ufsi = UFS_I(inode);
127         struct super_block *sb = inode->i_sb;
128         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
129         u64 mask = (u64) uspi->s_apbmask>>uspi->s_fpbshift;
130         int shift = uspi->s_apbshift-uspi->s_fpbshift;
131         Indirect chain[4], *q = chain;
132         unsigned *p;
133         unsigned flags = UFS_SB(sb)->s_flags;
134         u64 res = 0;
135 
136         UFSD(": uspi->s_fpbshift = %d ,uspi->s_apbmask = %x, mask=%llx\n",
137                 uspi->s_fpbshift, uspi->s_apbmask,
138                 (unsigned long long)mask);
139 
140         if (depth == 0)
141                 goto no_block;
142 
143 again:
144         p = offsets;
145 
146         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
147                 goto ufs2;
148 
149         if (!grow_chain32(ufsi, NULL, &ufsi->i_u1.i_data[*p++], chain, q))
150                 goto changed;
151         if (!q->key32)
152                 goto no_block;
153         while (--depth) {
154                 __fs32 *ptr;
155                 struct buffer_head *bh;
156                 unsigned n = *p++;
157 
158                 bh = sb_bread(sb, uspi->s_sbbase +
159                                   fs32_to_cpu(sb, q->key32) + (n>>shift));
160                 if (!bh)
161                         goto no_block;
162                 ptr = (__fs32 *)bh->b_data + (n & mask);
163                 if (!grow_chain32(ufsi, bh, ptr, chain, ++q))
164                         goto changed;
165                 if (!q->key32)
166                         goto no_block;
167         }
168         res = fs32_to_cpu(sb, q->key32);
169         goto found;
170 
171 ufs2:
172         if (!grow_chain64(ufsi, NULL, &ufsi->i_u1.u2_i_data[*p++], chain, q))
173                 goto changed;
174         if (!q->key64)
175                 goto no_block;
176 
177         while (--depth) {
178                 __fs64 *ptr;
179                 struct buffer_head *bh;
180                 unsigned n = *p++;
181 
182                 bh = sb_bread(sb, uspi->s_sbbase +
183                                   fs64_to_cpu(sb, q->key64) + (n>>shift));
184                 if (!bh)
185                         goto no_block;
186                 ptr = (__fs64 *)bh->b_data + (n & mask);
187                 if (!grow_chain64(ufsi, bh, ptr, chain, ++q))
188                         goto changed;
189                 if (!q->key64)
190                         goto no_block;
191         }
192         res = fs64_to_cpu(sb, q->key64);
193 found:
194         res += uspi->s_sbbase;
195 no_block:
196         while (q > chain) {
197                 brelse(q->bh);
198                 q--;
199         }
200         return res;
201 
202 changed:
203         while (q > chain) {
204                 brelse(q->bh);
205                 q--;
206         }
207         goto again;
208 }
209 
210 /*
211  * Unpacking tails: we have a file with partial final block and
212  * we had been asked to extend it.  If the fragment being written
213  * is within the same block, we need to extend the tail just to cover
214  * that fragment.  Otherwise the tail is extended to full block.
215  *
216  * Note that we might need to create a _new_ tail, but that will
217  * be handled elsewhere; this is strictly for resizing old
218  * ones.
219  */
220 static bool
221 ufs_extend_tail(struct inode *inode, u64 writes_to,
222                   int *err, struct page *locked_page)
223 {
224         struct ufs_inode_info *ufsi = UFS_I(inode);
225         struct super_block *sb = inode->i_sb;
226         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
227         unsigned lastfrag = ufsi->i_lastfrag;   /* it's a short file, so unsigned is enough */
228         unsigned block = ufs_fragstoblks(lastfrag);
229         unsigned new_size;
230         void *p;
231         u64 tmp;
232 
233         if (writes_to < (lastfrag | uspi->s_fpbmask))
234                 new_size = (writes_to & uspi->s_fpbmask) + 1;
235         else
236                 new_size = uspi->s_fpb;
237 
238         p = ufs_get_direct_data_ptr(uspi, ufsi, block);
239         tmp = ufs_new_fragments(inode, p, lastfrag, ufs_data_ptr_to_cpu(sb, p),
240                                 new_size - (lastfrag & uspi->s_fpbmask), err,
241                                 locked_page);
242         return tmp != 0;
243 }
244 
245 /**
246  * ufs_inode_getfrag() - allocate new fragment(s)
247  * @inode: pointer to inode
248  * @index: number of block pointer within the inode's array.
249  * @new_fragment: number of new allocated fragment(s)
250  * @err: we set it if something wrong
251  * @new: we set it if we allocate new block
252  * @locked_page: for ufs_new_fragments()
253  */
254 static u64
255 ufs_inode_getfrag(struct inode *inode, unsigned index,
256                   sector_t new_fragment, int *err,
257                   int *new, struct page *locked_page)
258 {
259         struct ufs_inode_info *ufsi = UFS_I(inode);
260         struct super_block *sb = inode->i_sb;
261         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
262         u64 tmp, goal, lastfrag;
263         unsigned nfrags = uspi->s_fpb;
264         void *p;
265 
266         /* TODO : to be done for write support
267         if ( (flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
268              goto ufs2;
269          */
270 
271         p = ufs_get_direct_data_ptr(uspi, ufsi, index);
272         tmp = ufs_data_ptr_to_cpu(sb, p);
273         if (tmp)
274                 goto out;
275 
276         lastfrag = ufsi->i_lastfrag;
277 
278         /* will that be a new tail? */
279         if (new_fragment < UFS_NDIR_FRAGMENT && new_fragment >= lastfrag)
280                 nfrags = (new_fragment & uspi->s_fpbmask) + 1;
281 
282         goal = 0;
283         if (index) {
284                 goal = ufs_data_ptr_to_cpu(sb,
285                                  ufs_get_direct_data_ptr(uspi, ufsi, index - 1));
286                 if (goal)
287                         goal += uspi->s_fpb;
288         }
289         tmp = ufs_new_fragments(inode, p, ufs_blknum(new_fragment),
290                                 goal, nfrags, err, locked_page);
291 
292         if (!tmp) {
293                 *err = -ENOSPC;
294                 return 0;
295         }
296 
297         if (new)
298                 *new = 1;
299         inode->i_ctime = current_time(inode);
300         if (IS_SYNC(inode))
301                 ufs_sync_inode (inode);
302         mark_inode_dirty(inode);
303 out:
304         return tmp + uspi->s_sbbase;
305 
306      /* This part : To be implemented ....
307         Required only for writing, not required for READ-ONLY.
308 ufs2:
309 
310         u2_block = ufs_fragstoblks(fragment);
311         u2_blockoff = ufs_fragnum(fragment);
312         p = ufsi->i_u1.u2_i_data + block;
313         goal = 0;
314 
315 repeat2:
316         tmp = fs32_to_cpu(sb, *p);
317         lastfrag = ufsi->i_lastfrag;
318 
319      */
320 }
321 
322 /**
323  * ufs_inode_getblock() - allocate new block
324  * @inode: pointer to inode
325  * @ind_block: block number of the indirect block
326  * @index: number of pointer within the indirect block
327  * @new_fragment: number of new allocated fragment
328  *  (block will hold this fragment and also uspi->s_fpb-1)
329  * @err: see ufs_inode_getfrag()
330  * @new: see ufs_inode_getfrag()
331  * @locked_page: see ufs_inode_getfrag()
332  */
333 static u64
334 ufs_inode_getblock(struct inode *inode, u64 ind_block,
335                   unsigned index, sector_t new_fragment, int *err,
336                   int *new, struct page *locked_page)
337 {
338         struct super_block *sb = inode->i_sb;
339         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
340         int shift = uspi->s_apbshift - uspi->s_fpbshift;
341         u64 tmp = 0, goal;
342         struct buffer_head *bh;
343         void *p;
344 
345         if (!ind_block)
346                 return 0;
347 
348         bh = sb_bread(sb, ind_block + (index >> shift));
349         if (unlikely(!bh)) {
350                 *err = -EIO;
351                 return 0;
352         }
353 
354         index &= uspi->s_apbmask >> uspi->s_fpbshift;
355         if (uspi->fs_magic == UFS2_MAGIC)
356                 p = (__fs64 *)bh->b_data + index;
357         else
358                 p = (__fs32 *)bh->b_data + index;
359 
360         tmp = ufs_data_ptr_to_cpu(sb, p);
361         if (tmp)
362                 goto out;
363 
364         if (index && (uspi->fs_magic == UFS2_MAGIC ?
365                       (tmp = fs64_to_cpu(sb, ((__fs64 *)bh->b_data)[index-1])) :
366                       (tmp = fs32_to_cpu(sb, ((__fs32 *)bh->b_data)[index-1]))))
367                 goal = tmp + uspi->s_fpb;
368         else
369                 goal = bh->b_blocknr + uspi->s_fpb;
370         tmp = ufs_new_fragments(inode, p, ufs_blknum(new_fragment), goal,
371                                 uspi->s_fpb, err, locked_page);
372         if (!tmp)
373                 goto out;
374 
375         if (new)
376                 *new = 1;
377 
378         mark_buffer_dirty(bh);
379         if (IS_SYNC(inode))
380                 sync_dirty_buffer(bh);
381         inode->i_ctime = current_time(inode);
382         mark_inode_dirty(inode);
383 out:
384         brelse (bh);
385         UFSD("EXIT\n");
386         if (tmp)
387                 tmp += uspi->s_sbbase;
388         return tmp;
389 }
390 
391 /**
392  * ufs_getfrag_block() - `get_block_t' function, interface between UFS and
393  * readpage, writepage and so on
394  */
395 
396 static int ufs_getfrag_block(struct inode *inode, sector_t fragment, struct buffer_head *bh_result, int create)
397 {
398         struct super_block *sb = inode->i_sb;
399         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
400         int err = 0, new = 0;
401         unsigned offsets[4];
402         int depth = ufs_block_to_path(inode, fragment >> uspi->s_fpbshift, offsets);
403         u64 phys64 = 0;
404         unsigned frag = fragment & uspi->s_fpbmask;
405 
406         phys64 = ufs_frag_map(inode, offsets, depth);
407         if (!create)
408                 goto done;
409 
410         if (phys64) {
411                 if (fragment >= UFS_NDIR_FRAGMENT)
412                         goto done;
413                 read_seqlock_excl(&UFS_I(inode)->meta_lock);
414                 if (fragment < UFS_I(inode)->i_lastfrag) {
415                         read_sequnlock_excl(&UFS_I(inode)->meta_lock);
416                         goto done;
417                 }
418                 read_sequnlock_excl(&UFS_I(inode)->meta_lock);
419         }
420         /* This code entered only while writing ....? */
421 
422         mutex_lock(&UFS_I(inode)->truncate_mutex);
423 
424         UFSD("ENTER, ino %lu, fragment %llu\n", inode->i_ino, (unsigned long long)fragment);
425         if (unlikely(!depth)) {
426                 ufs_warning(sb, "ufs_get_block", "block > big");
427                 err = -EIO;
428                 goto out;
429         }
430 
431         if (UFS_I(inode)->i_lastfrag < UFS_NDIR_FRAGMENT) {
432                 unsigned lastfrag = UFS_I(inode)->i_lastfrag;
433                 unsigned tailfrags = lastfrag & uspi->s_fpbmask;
434                 if (tailfrags && fragment >= lastfrag) {
435                         if (!ufs_extend_tail(inode, fragment,
436                                              &err, bh_result->b_page))
437                                 goto out;
438                 }
439         }
440 
441         if (depth == 1) {
442                 phys64 = ufs_inode_getfrag(inode, offsets[0], fragment,
443                                            &err, &new, bh_result->b_page);
444         } else {
445                 int i;
446                 phys64 = ufs_inode_getfrag(inode, offsets[0], fragment,
447                                            &err, NULL, NULL);
448                 for (i = 1; i < depth - 1; i++)
449                         phys64 = ufs_inode_getblock(inode, phys64, offsets[i],
450                                                 fragment, &err, NULL, NULL);
451                 phys64 = ufs_inode_getblock(inode, phys64, offsets[depth - 1],
452                                         fragment, &err, &new, bh_result->b_page);
453         }
454 out:
455         if (phys64) {
456                 phys64 += frag;
457                 map_bh(bh_result, sb, phys64);
458                 if (new)
459                         set_buffer_new(bh_result);
460         }
461         mutex_unlock(&UFS_I(inode)->truncate_mutex);
462         return err;
463 
464 done:
465         if (phys64)
466                 map_bh(bh_result, sb, phys64 + frag);
467         return 0;
468 }
469 
470 static int ufs_writepage(struct page *page, struct writeback_control *wbc)
471 {
472         return block_write_full_page(page,ufs_getfrag_block,wbc);
473 }
474 
475 static int ufs_readpage(struct file *file, struct page *page)
476 {
477         return block_read_full_page(page,ufs_getfrag_block);
478 }
479 
480 int ufs_prepare_chunk(struct page *page, loff_t pos, unsigned len)
481 {
482         return __block_write_begin(page, pos, len, ufs_getfrag_block);
483 }
484 
485 static void ufs_truncate_blocks(struct inode *);
486 
487 static void ufs_write_failed(struct address_space *mapping, loff_t to)
488 {
489         struct inode *inode = mapping->host;
490 
491         if (to > inode->i_size) {
492                 truncate_pagecache(inode, inode->i_size);
493                 ufs_truncate_blocks(inode);
494         }
495 }
496 
497 static int ufs_write_begin(struct file *file, struct address_space *mapping,
498                         loff_t pos, unsigned len, unsigned flags,
499                         struct page **pagep, void **fsdata)
500 {
501         int ret;
502 
503         ret = block_write_begin(mapping, pos, len, flags, pagep,
504                                 ufs_getfrag_block);
505         if (unlikely(ret))
506                 ufs_write_failed(mapping, pos + len);
507 
508         return ret;
509 }
510 
511 static int ufs_write_end(struct file *file, struct address_space *mapping,
512                         loff_t pos, unsigned len, unsigned copied,
513                         struct page *page, void *fsdata)
514 {
515         int ret;
516 
517         ret = generic_write_end(file, mapping, pos, len, copied, page, fsdata);
518         if (ret < len)
519                 ufs_write_failed(mapping, pos + len);
520         return ret;
521 }
522 
523 static sector_t ufs_bmap(struct address_space *mapping, sector_t block)
524 {
525         return generic_block_bmap(mapping,block,ufs_getfrag_block);
526 }
527 
528 const struct address_space_operations ufs_aops = {
529         .readpage = ufs_readpage,
530         .writepage = ufs_writepage,
531         .write_begin = ufs_write_begin,
532         .write_end = ufs_write_end,
533         .bmap = ufs_bmap
534 };
535 
536 static void ufs_set_inode_ops(struct inode *inode)
537 {
538         if (S_ISREG(inode->i_mode)) {
539                 inode->i_op = &ufs_file_inode_operations;
540                 inode->i_fop = &ufs_file_operations;
541                 inode->i_mapping->a_ops = &ufs_aops;
542         } else if (S_ISDIR(inode->i_mode)) {
543                 inode->i_op = &ufs_dir_inode_operations;
544                 inode->i_fop = &ufs_dir_operations;
545                 inode->i_mapping->a_ops = &ufs_aops;
546         } else if (S_ISLNK(inode->i_mode)) {
547                 if (!inode->i_blocks) {
548                         inode->i_link = (char *)UFS_I(inode)->i_u1.i_symlink;
549                         inode->i_op = &simple_symlink_inode_operations;
550                 } else {
551                         inode->i_mapping->a_ops = &ufs_aops;
552                         inode->i_op = &page_symlink_inode_operations;
553                         inode_nohighmem(inode);
554                 }
555         } else
556                 init_special_inode(inode, inode->i_mode,
557                                    ufs_get_inode_dev(inode->i_sb, UFS_I(inode)));
558 }
559 
560 static int ufs1_read_inode(struct inode *inode, struct ufs_inode *ufs_inode)
561 {
562         struct ufs_inode_info *ufsi = UFS_I(inode);
563         struct super_block *sb = inode->i_sb;
564         umode_t mode;
565 
566         /*
567          * Copy data to the in-core inode.
568          */
569         inode->i_mode = mode = fs16_to_cpu(sb, ufs_inode->ui_mode);
570         set_nlink(inode, fs16_to_cpu(sb, ufs_inode->ui_nlink));
571         if (inode->i_nlink == 0)
572                 return -ESTALE;
573 
574         /*
575          * Linux now has 32-bit uid and gid, so we can support EFT.
576          */
577         i_uid_write(inode, ufs_get_inode_uid(sb, ufs_inode));
578         i_gid_write(inode, ufs_get_inode_gid(sb, ufs_inode));
579 
580         inode->i_size = fs64_to_cpu(sb, ufs_inode->ui_size);
581         inode->i_atime.tv_sec = (signed)fs32_to_cpu(sb, ufs_inode->ui_atime.tv_sec);
582         inode->i_ctime.tv_sec = (signed)fs32_to_cpu(sb, ufs_inode->ui_ctime.tv_sec);
583         inode->i_mtime.tv_sec = (signed)fs32_to_cpu(sb, ufs_inode->ui_mtime.tv_sec);
584         inode->i_mtime.tv_nsec = 0;
585         inode->i_atime.tv_nsec = 0;
586         inode->i_ctime.tv_nsec = 0;
587         inode->i_blocks = fs32_to_cpu(sb, ufs_inode->ui_blocks);
588         inode->i_generation = fs32_to_cpu(sb, ufs_inode->ui_gen);
589         ufsi->i_flags = fs32_to_cpu(sb, ufs_inode->ui_flags);
590         ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow);
591         ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag);
592 
593 
594         if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) {
595                 memcpy(ufsi->i_u1.i_data, &ufs_inode->ui_u2.ui_addr,
596                        sizeof(ufs_inode->ui_u2.ui_addr));
597         } else {
598                 memcpy(ufsi->i_u1.i_symlink, ufs_inode->ui_u2.ui_symlink,
599                        sizeof(ufs_inode->ui_u2.ui_symlink) - 1);
600                 ufsi->i_u1.i_symlink[sizeof(ufs_inode->ui_u2.ui_symlink) - 1] = 0;
601         }
602         return 0;
603 }
604 
605 static int ufs2_read_inode(struct inode *inode, struct ufs2_inode *ufs2_inode)
606 {
607         struct ufs_inode_info *ufsi = UFS_I(inode);
608         struct super_block *sb = inode->i_sb;
609         umode_t mode;
610 
611         UFSD("Reading ufs2 inode, ino %lu\n", inode->i_ino);
612         /*
613          * Copy data to the in-core inode.
614          */
615         inode->i_mode = mode = fs16_to_cpu(sb, ufs2_inode->ui_mode);
616         set_nlink(inode, fs16_to_cpu(sb, ufs2_inode->ui_nlink));
617         if (inode->i_nlink == 0)
618                 return -ESTALE;
619 
620         /*
621          * Linux now has 32-bit uid and gid, so we can support EFT.
622          */
623         i_uid_write(inode, fs32_to_cpu(sb, ufs2_inode->ui_uid));
624         i_gid_write(inode, fs32_to_cpu(sb, ufs2_inode->ui_gid));
625 
626         inode->i_size = fs64_to_cpu(sb, ufs2_inode->ui_size);
627         inode->i_atime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_atime);
628         inode->i_ctime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_ctime);
629         inode->i_mtime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_mtime);
630         inode->i_atime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_atimensec);
631         inode->i_ctime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_ctimensec);
632         inode->i_mtime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_mtimensec);
633         inode->i_blocks = fs64_to_cpu(sb, ufs2_inode->ui_blocks);
634         inode->i_generation = fs32_to_cpu(sb, ufs2_inode->ui_gen);
635         ufsi->i_flags = fs32_to_cpu(sb, ufs2_inode->ui_flags);
636         /*
637         ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow);
638         ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag);
639         */
640 
641         if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) {
642                 memcpy(ufsi->i_u1.u2_i_data, &ufs2_inode->ui_u2.ui_addr,
643                        sizeof(ufs2_inode->ui_u2.ui_addr));
644         } else {
645                 memcpy(ufsi->i_u1.i_symlink, ufs2_inode->ui_u2.ui_symlink,
646                        sizeof(ufs2_inode->ui_u2.ui_symlink) - 1);
647                 ufsi->i_u1.i_symlink[sizeof(ufs2_inode->ui_u2.ui_symlink) - 1] = 0;
648         }
649         return 0;
650 }
651 
652 struct inode *ufs_iget(struct super_block *sb, unsigned long ino)
653 {
654         struct ufs_inode_info *ufsi;
655         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
656         struct buffer_head * bh;
657         struct inode *inode;
658         int err = -EIO;
659 
660         UFSD("ENTER, ino %lu\n", ino);
661 
662         if (ino < UFS_ROOTINO || ino > (uspi->s_ncg * uspi->s_ipg)) {
663                 ufs_warning(sb, "ufs_read_inode", "bad inode number (%lu)\n",
664                             ino);
665                 return ERR_PTR(-EIO);
666         }
667 
668         inode = iget_locked(sb, ino);
669         if (!inode)
670                 return ERR_PTR(-ENOMEM);
671         if (!(inode->i_state & I_NEW))
672                 return inode;
673 
674         ufsi = UFS_I(inode);
675 
676         bh = sb_bread(sb, uspi->s_sbbase + ufs_inotofsba(inode->i_ino));
677         if (!bh) {
678                 ufs_warning(sb, "ufs_read_inode", "unable to read inode %lu\n",
679                             inode->i_ino);
680                 goto bad_inode;
681         }
682         if ((UFS_SB(sb)->s_flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
683                 struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data;
684 
685                 err = ufs2_read_inode(inode,
686                                       ufs2_inode + ufs_inotofsbo(inode->i_ino));
687         } else {
688                 struct ufs_inode *ufs_inode = (struct ufs_inode *)bh->b_data;
689 
690                 err = ufs1_read_inode(inode,
691                                       ufs_inode + ufs_inotofsbo(inode->i_ino));
692         }
693         brelse(bh);
694         if (err)
695                 goto bad_inode;
696 
697         inode_inc_iversion(inode);
698         ufsi->i_lastfrag =
699                 (inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift;
700         ufsi->i_dir_start_lookup = 0;
701         ufsi->i_osync = 0;
702 
703         ufs_set_inode_ops(inode);
704 
705         UFSD("EXIT\n");
706         unlock_new_inode(inode);
707         return inode;
708 
709 bad_inode:
710         iget_failed(inode);
711         return ERR_PTR(err);
712 }
713 
714 static void ufs1_update_inode(struct inode *inode, struct ufs_inode *ufs_inode)
715 {
716         struct super_block *sb = inode->i_sb;
717         struct ufs_inode_info *ufsi = UFS_I(inode);
718 
719         ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode);
720         ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink);
721 
722         ufs_set_inode_uid(sb, ufs_inode, i_uid_read(inode));
723         ufs_set_inode_gid(sb, ufs_inode, i_gid_read(inode));
724 
725         ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size);
726         ufs_inode->ui_atime.tv_sec = cpu_to_fs32(sb, inode->i_atime.tv_sec);
727         ufs_inode->ui_atime.tv_usec = 0;
728         ufs_inode->ui_ctime.tv_sec = cpu_to_fs32(sb, inode->i_ctime.tv_sec);
729         ufs_inode->ui_ctime.tv_usec = 0;
730         ufs_inode->ui_mtime.tv_sec = cpu_to_fs32(sb, inode->i_mtime.tv_sec);
731         ufs_inode->ui_mtime.tv_usec = 0;
732         ufs_inode->ui_blocks = cpu_to_fs32(sb, inode->i_blocks);
733         ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags);
734         ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation);
735 
736         if ((UFS_SB(sb)->s_flags & UFS_UID_MASK) == UFS_UID_EFT) {
737                 ufs_inode->ui_u3.ui_sun.ui_shadow = cpu_to_fs32(sb, ufsi->i_shadow);
738                 ufs_inode->ui_u3.ui_sun.ui_oeftflag = cpu_to_fs32(sb, ufsi->i_oeftflag);
739         }
740 
741         if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
742                 /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */
743                 ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.i_data[0];
744         } else if (inode->i_blocks) {
745                 memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.i_data,
746                        sizeof(ufs_inode->ui_u2.ui_addr));
747         }
748         else {
749                 memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink,
750                        sizeof(ufs_inode->ui_u2.ui_symlink));
751         }
752 
753         if (!inode->i_nlink)
754                 memset (ufs_inode, 0, sizeof(struct ufs_inode));
755 }
756 
757 static void ufs2_update_inode(struct inode *inode, struct ufs2_inode *ufs_inode)
758 {
759         struct super_block *sb = inode->i_sb;
760         struct ufs_inode_info *ufsi = UFS_I(inode);
761 
762         UFSD("ENTER\n");
763         ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode);
764         ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink);
765 
766         ufs_inode->ui_uid = cpu_to_fs32(sb, i_uid_read(inode));
767         ufs_inode->ui_gid = cpu_to_fs32(sb, i_gid_read(inode));
768 
769         ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size);
770         ufs_inode->ui_atime = cpu_to_fs64(sb, inode->i_atime.tv_sec);
771         ufs_inode->ui_atimensec = cpu_to_fs32(sb, inode->i_atime.tv_nsec);
772         ufs_inode->ui_ctime = cpu_to_fs64(sb, inode->i_ctime.tv_sec);
773         ufs_inode->ui_ctimensec = cpu_to_fs32(sb, inode->i_ctime.tv_nsec);
774         ufs_inode->ui_mtime = cpu_to_fs64(sb, inode->i_mtime.tv_sec);
775         ufs_inode->ui_mtimensec = cpu_to_fs32(sb, inode->i_mtime.tv_nsec);
776 
777         ufs_inode->ui_blocks = cpu_to_fs64(sb, inode->i_blocks);
778         ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags);
779         ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation);
780 
781         if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
782                 /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */
783                 ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.u2_i_data[0];
784         } else if (inode->i_blocks) {
785                 memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.u2_i_data,
786                        sizeof(ufs_inode->ui_u2.ui_addr));
787         } else {
788                 memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink,
789                        sizeof(ufs_inode->ui_u2.ui_symlink));
790         }
791 
792         if (!inode->i_nlink)
793                 memset (ufs_inode, 0, sizeof(struct ufs2_inode));
794         UFSD("EXIT\n");
795 }
796 
797 static int ufs_update_inode(struct inode * inode, int do_sync)
798 {
799         struct super_block *sb = inode->i_sb;
800         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
801         struct buffer_head * bh;
802 
803         UFSD("ENTER, ino %lu\n", inode->i_ino);
804 
805         if (inode->i_ino < UFS_ROOTINO ||
806             inode->i_ino > (uspi->s_ncg * uspi->s_ipg)) {
807                 ufs_warning (sb, "ufs_read_inode", "bad inode number (%lu)\n", inode->i_ino);
808                 return -1;
809         }
810 
811         bh = sb_bread(sb, ufs_inotofsba(inode->i_ino));
812         if (!bh) {
813                 ufs_warning (sb, "ufs_read_inode", "unable to read inode %lu\n", inode->i_ino);
814                 return -1;
815         }
816         if (uspi->fs_magic == UFS2_MAGIC) {
817                 struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data;
818 
819                 ufs2_update_inode(inode,
820                                   ufs2_inode + ufs_inotofsbo(inode->i_ino));
821         } else {
822                 struct ufs_inode *ufs_inode = (struct ufs_inode *) bh->b_data;
823 
824                 ufs1_update_inode(inode, ufs_inode + ufs_inotofsbo(inode->i_ino));
825         }
826 
827         mark_buffer_dirty(bh);
828         if (do_sync)
829                 sync_dirty_buffer(bh);
830         brelse (bh);
831 
832         UFSD("EXIT\n");
833         return 0;
834 }
835 
836 int ufs_write_inode(struct inode *inode, struct writeback_control *wbc)
837 {
838         return ufs_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL);
839 }
840 
841 int ufs_sync_inode (struct inode *inode)
842 {
843         return ufs_update_inode (inode, 1);
844 }
845 
846 void ufs_evict_inode(struct inode * inode)
847 {
848         int want_delete = 0;
849 
850         if (!inode->i_nlink && !is_bad_inode(inode))
851                 want_delete = 1;
852 
853         truncate_inode_pages_final(&inode->i_data);
854         if (want_delete) {
855                 inode->i_size = 0;
856                 if (inode->i_blocks &&
857                     (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
858                      S_ISLNK(inode->i_mode)))
859                         ufs_truncate_blocks(inode);
860                 ufs_update_inode(inode, inode_needs_sync(inode));
861         }
862 
863         invalidate_inode_buffers(inode);
864         clear_inode(inode);
865 
866         if (want_delete)
867                 ufs_free_inode(inode);
868 }
869 
870 struct to_free {
871         struct inode *inode;
872         u64 to;
873         unsigned count;
874 };
875 
876 static inline void free_data(struct to_free *ctx, u64 from, unsigned count)
877 {
878         if (ctx->count && ctx->to != from) {
879                 ufs_free_blocks(ctx->inode, ctx->to - ctx->count, ctx->count);
880                 ctx->count = 0;
881         }
882         ctx->count += count;
883         ctx->to = from + count;
884 }
885 
886 #define DIRECT_FRAGMENT ((inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift)
887 
888 static void ufs_trunc_direct(struct inode *inode)
889 {
890         struct ufs_inode_info *ufsi = UFS_I(inode);
891         struct super_block * sb;
892         struct ufs_sb_private_info * uspi;
893         void *p;
894         u64 frag1, frag2, frag3, frag4, block1, block2;
895         struct to_free ctx = {.inode = inode};
896         unsigned i, tmp;
897 
898         UFSD("ENTER: ino %lu\n", inode->i_ino);
899 
900         sb = inode->i_sb;
901         uspi = UFS_SB(sb)->s_uspi;
902 
903         frag1 = DIRECT_FRAGMENT;
904         frag4 = min_t(u64, UFS_NDIR_FRAGMENT, ufsi->i_lastfrag);
905         frag2 = ((frag1 & uspi->s_fpbmask) ? ((frag1 | uspi->s_fpbmask) + 1) : frag1);
906         frag3 = frag4 & ~uspi->s_fpbmask;
907         block1 = block2 = 0;
908         if (frag2 > frag3) {
909                 frag2 = frag4;
910                 frag3 = frag4 = 0;
911         } else if (frag2 < frag3) {
912                 block1 = ufs_fragstoblks (frag2);
913                 block2 = ufs_fragstoblks (frag3);
914         }
915 
916         UFSD("ino %lu, frag1 %llu, frag2 %llu, block1 %llu, block2 %llu,"
917              " frag3 %llu, frag4 %llu\n", inode->i_ino,
918              (unsigned long long)frag1, (unsigned long long)frag2,
919              (unsigned long long)block1, (unsigned long long)block2,
920              (unsigned long long)frag3, (unsigned long long)frag4);
921 
922         if (frag1 >= frag2)
923                 goto next1;
924 
925         /*
926          * Free first free fragments
927          */
928         p = ufs_get_direct_data_ptr(uspi, ufsi, ufs_fragstoblks(frag1));
929         tmp = ufs_data_ptr_to_cpu(sb, p);
930         if (!tmp )
931                 ufs_panic (sb, "ufs_trunc_direct", "internal error");
932         frag2 -= frag1;
933         frag1 = ufs_fragnum (frag1);
934 
935         ufs_free_fragments(inode, tmp + frag1, frag2);
936 
937 next1:
938         /*
939          * Free whole blocks
940          */
941         for (i = block1 ; i < block2; i++) {
942                 p = ufs_get_direct_data_ptr(uspi, ufsi, i);
943                 tmp = ufs_data_ptr_to_cpu(sb, p);
944                 if (!tmp)
945                         continue;
946                 write_seqlock(&ufsi->meta_lock);
947                 ufs_data_ptr_clear(uspi, p);
948                 write_sequnlock(&ufsi->meta_lock);
949 
950                 free_data(&ctx, tmp, uspi->s_fpb);
951         }
952 
953         free_data(&ctx, 0, 0);
954 
955         if (frag3 >= frag4)
956                 goto next3;
957 
958         /*
959          * Free last free fragments
960          */
961         p = ufs_get_direct_data_ptr(uspi, ufsi, ufs_fragstoblks(frag3));
962         tmp = ufs_data_ptr_to_cpu(sb, p);
963         if (!tmp )
964                 ufs_panic(sb, "ufs_truncate_direct", "internal error");
965         frag4 = ufs_fragnum (frag4);
966         write_seqlock(&ufsi->meta_lock);
967         ufs_data_ptr_clear(uspi, p);
968         write_sequnlock(&ufsi->meta_lock);
969 
970         ufs_free_fragments (inode, tmp, frag4);
971  next3:
972 
973         UFSD("EXIT: ino %lu\n", inode->i_ino);
974 }
975 
976 static void free_full_branch(struct inode *inode, u64 ind_block, int depth)
977 {
978         struct super_block *sb = inode->i_sb;
979         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
980         struct ufs_buffer_head *ubh = ubh_bread(sb, ind_block, uspi->s_bsize);
981         unsigned i;
982 
983         if (!ubh)
984                 return;
985 
986         if (--depth) {
987                 for (i = 0; i < uspi->s_apb; i++) {
988                         void *p = ubh_get_data_ptr(uspi, ubh, i);
989                         u64 block = ufs_data_ptr_to_cpu(sb, p);
990                         if (block)
991                                 free_full_branch(inode, block, depth);
992                 }
993         } else {
994                 struct to_free ctx = {.inode = inode};
995 
996                 for (i = 0; i < uspi->s_apb; i++) {
997                         void *p = ubh_get_data_ptr(uspi, ubh, i);
998                         u64 block = ufs_data_ptr_to_cpu(sb, p);
999                         if (block)
1000                                 free_data(&ctx, block, uspi->s_fpb);
1001                 }
1002                 free_data(&ctx, 0, 0);
1003         }
1004 
1005         ubh_bforget(ubh);
1006         ufs_free_blocks(inode, ind_block, uspi->s_fpb);
1007 }
1008 
1009 static void free_branch_tail(struct inode *inode, unsigned from, struct ufs_buffer_head *ubh, int depth)
1010 {
1011         struct super_block *sb = inode->i_sb;
1012         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
1013         unsigned i;
1014 
1015         if (--depth) {
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_full_branch(inode, block, depth);
1025                         }
1026                 }
1027         } else {
1028                 struct to_free ctx = {.inode = inode};
1029 
1030                 for (i = from; i < uspi->s_apb; i++) {
1031                         void *p = ubh_get_data_ptr(uspi, ubh, i);
1032                         u64 block = ufs_data_ptr_to_cpu(sb, p);
1033                         if (block) {
1034                                 write_seqlock(&UFS_I(inode)->meta_lock);
1035                                 ufs_data_ptr_clear(uspi, p);
1036                                 write_sequnlock(&UFS_I(inode)->meta_lock);
1037                                 ubh_mark_buffer_dirty(ubh);
1038                                 free_data(&ctx, block, uspi->s_fpb);
1039                         }
1040                 }
1041                 free_data(&ctx, 0, 0);
1042         }
1043         if (IS_SYNC(inode) && ubh_buffer_dirty(ubh))
1044                 ubh_sync_block(ubh);
1045         ubh_brelse(ubh);
1046 }
1047 
1048 static int ufs_alloc_lastblock(struct inode *inode, loff_t size)
1049 {
1050         int err = 0;
1051         struct super_block *sb = inode->i_sb;
1052         struct address_space *mapping = inode->i_mapping;
1053         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
1054         unsigned i, end;
1055         sector_t lastfrag;
1056         struct page *lastpage;
1057         struct buffer_head *bh;
1058         u64 phys64;
1059 
1060         lastfrag = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
1061 
1062         if (!lastfrag)
1063                 goto out;
1064 
1065         lastfrag--;
1066 
1067         lastpage = ufs_get_locked_page(mapping, lastfrag >>
1068                                        (PAGE_SHIFT - inode->i_blkbits));
1069        if (IS_ERR(lastpage)) {
1070                err = -EIO;
1071                goto out;
1072        }
1073 
1074        end = lastfrag & ((1 << (PAGE_SHIFT - inode->i_blkbits)) - 1);
1075        bh = page_buffers(lastpage);
1076        for (i = 0; i < end; ++i)
1077                bh = bh->b_this_page;
1078 
1079 
1080        err = ufs_getfrag_block(inode, lastfrag, bh, 1);
1081 
1082        if (unlikely(err))
1083                goto out_unlock;
1084 
1085        if (buffer_new(bh)) {
1086                clear_buffer_new(bh);
1087                clean_bdev_bh_alias(bh);
1088                /*
1089                 * we do not zeroize fragment, because of
1090                 * if it maped to hole, it already contains zeroes
1091                 */
1092                set_buffer_uptodate(bh);
1093                mark_buffer_dirty(bh);
1094                set_page_dirty(lastpage);
1095        }
1096 
1097        if (lastfrag >= UFS_IND_FRAGMENT) {
1098                end = uspi->s_fpb - ufs_fragnum(lastfrag) - 1;
1099                phys64 = bh->b_blocknr + 1;
1100                for (i = 0; i < end; ++i) {
1101                        bh = sb_getblk(sb, i + phys64);
1102                        lock_buffer(bh);
1103                        memset(bh->b_data, 0, sb->s_blocksize);
1104                        set_buffer_uptodate(bh);
1105                        mark_buffer_dirty(bh);
1106                        unlock_buffer(bh);
1107                        sync_dirty_buffer(bh);
1108                        brelse(bh);
1109                }
1110        }
1111 out_unlock:
1112        ufs_put_locked_page(lastpage);
1113 out:
1114        return err;
1115 }
1116 
1117 static void ufs_truncate_blocks(struct inode *inode)
1118 {
1119         struct ufs_inode_info *ufsi = UFS_I(inode);
1120         struct super_block *sb = inode->i_sb;
1121         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
1122         unsigned offsets[4];
1123         int depth;
1124         int depth2;
1125         unsigned i;
1126         struct ufs_buffer_head *ubh[3];
1127         void *p;
1128         u64 block;
1129 
1130         if (inode->i_size) {
1131                 sector_t last = (inode->i_size - 1) >> uspi->s_bshift;
1132                 depth = ufs_block_to_path(inode, last, offsets);
1133                 if (!depth)
1134                         return;
1135         } else {
1136                 depth = 1;
1137         }
1138 
1139         for (depth2 = depth - 1; depth2; depth2--)
1140                 if (offsets[depth2] != uspi->s_apb - 1)
1141                         break;
1142 
1143         mutex_lock(&ufsi->truncate_mutex);
1144         if (depth == 1) {
1145                 ufs_trunc_direct(inode);
1146                 offsets[0] = UFS_IND_BLOCK;
1147         } else {
1148                 /* get the blocks that should be partially emptied */
1149                 p = ufs_get_direct_data_ptr(uspi, ufsi, offsets[0]++);
1150                 for (i = 0; i < depth2; i++) {
1151                         block = ufs_data_ptr_to_cpu(sb, p);
1152                         if (!block)
1153                                 break;
1154                         ubh[i] = ubh_bread(sb, block, uspi->s_bsize);
1155                         if (!ubh[i]) {
1156                                 write_seqlock(&ufsi->meta_lock);
1157                                 ufs_data_ptr_clear(uspi, p);
1158                                 write_sequnlock(&ufsi->meta_lock);
1159                                 break;
1160                         }
1161                         p = ubh_get_data_ptr(uspi, ubh[i], offsets[i + 1]++);
1162                 }
1163                 while (i--)
1164                         free_branch_tail(inode, offsets[i + 1], ubh[i], depth - i - 1);
1165         }
1166         for (i = offsets[0]; i <= UFS_TIND_BLOCK; i++) {
1167                 p = ufs_get_direct_data_ptr(uspi, ufsi, i);
1168                 block = ufs_data_ptr_to_cpu(sb, p);
1169                 if (block) {
1170                         write_seqlock(&ufsi->meta_lock);
1171                         ufs_data_ptr_clear(uspi, p);
1172                         write_sequnlock(&ufsi->meta_lock);
1173                         free_full_branch(inode, block, i - UFS_IND_BLOCK + 1);
1174                 }
1175         }
1176         read_seqlock_excl(&ufsi->meta_lock);
1177         ufsi->i_lastfrag = DIRECT_FRAGMENT;
1178         read_sequnlock_excl(&ufsi->meta_lock);
1179         mark_inode_dirty(inode);
1180         mutex_unlock(&ufsi->truncate_mutex);
1181 }
1182 
1183 static int ufs_truncate(struct inode *inode, loff_t size)
1184 {
1185         int err = 0;
1186 
1187         UFSD("ENTER: ino %lu, i_size: %llu, old_i_size: %llu\n",
1188              inode->i_ino, (unsigned long long)size,
1189              (unsigned long long)i_size_read(inode));
1190 
1191         if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
1192               S_ISLNK(inode->i_mode)))
1193                 return -EINVAL;
1194         if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
1195                 return -EPERM;
1196 
1197         err = ufs_alloc_lastblock(inode, size);
1198 
1199         if (err)
1200                 goto out;
1201 
1202         block_truncate_page(inode->i_mapping, size, ufs_getfrag_block);
1203 
1204         truncate_setsize(inode, size);
1205 
1206         ufs_truncate_blocks(inode);
1207         inode->i_mtime = inode->i_ctime = current_time(inode);
1208         mark_inode_dirty(inode);
1209 out:
1210         UFSD("EXIT: err %d\n", err);
1211         return err;
1212 }
1213 
1214 int ufs_setattr(struct dentry *dentry, struct iattr *attr)
1215 {
1216         struct inode *inode = d_inode(dentry);
1217         unsigned int ia_valid = attr->ia_valid;
1218         int error;
1219 
1220         error = setattr_prepare(dentry, attr);
1221         if (error)
1222                 return error;
1223 
1224         if (ia_valid & ATTR_SIZE && attr->ia_size != inode->i_size) {
1225                 error = ufs_truncate(inode, attr->ia_size);
1226                 if (error)
1227                         return error;
1228         }
1229 
1230         setattr_copy(inode, attr);
1231         mark_inode_dirty(inode);
1232         return 0;
1233 }
1234 
1235 const struct inode_operations ufs_file_inode_operations = {
1236         .setattr = ufs_setattr,
1237 };
1238 

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