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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/mpage.h>
39#include <linux/writeback.h>
40#include <linux/iversion.h>
41
42#include "ufs_fs.h"
43#include "ufs.h"
44#include "swab.h"
45#include "util.h"
46
47static int ufs_block_to_path(struct inode *inode, sector_t i_block, unsigned offsets[4])
48{
49 struct ufs_sb_private_info *uspi = UFS_SB(inode->i_sb)->s_uspi;
50 int ptrs = uspi->s_apb;
51 int ptrs_bits = uspi->s_apbshift;
52 const long direct_blocks = UFS_NDADDR,
53 indirect_blocks = ptrs,
54 double_blocks = (1 << (ptrs_bits * 2));
55 int n = 0;
56
57
58 UFSD("ptrs=uspi->s_apb = %d,double_blocks=%ld \n",ptrs,double_blocks);
59 if (i_block < direct_blocks) {
60 offsets[n++] = i_block;
61 } else if ((i_block -= direct_blocks) < indirect_blocks) {
62 offsets[n++] = UFS_IND_BLOCK;
63 offsets[n++] = i_block;
64 } else if ((i_block -= indirect_blocks) < double_blocks) {
65 offsets[n++] = UFS_DIND_BLOCK;
66 offsets[n++] = i_block >> ptrs_bits;
67 offsets[n++] = i_block & (ptrs - 1);
68 } else if (((i_block -= double_blocks) >> (ptrs_bits * 2)) < ptrs) {
69 offsets[n++] = UFS_TIND_BLOCK;
70 offsets[n++] = i_block >> (ptrs_bits * 2);
71 offsets[n++] = (i_block >> ptrs_bits) & (ptrs - 1);
72 offsets[n++] = i_block & (ptrs - 1);
73 } else {
74 ufs_warning(inode->i_sb, "ufs_block_to_path", "block > big");
75 }
76 return n;
77}
78
79typedef struct {
80 void *p;
81 union {
82 __fs32 key32;
83 __fs64 key64;
84 };
85 struct buffer_head *bh;
86} Indirect;
87
88static inline int grow_chain32(struct ufs_inode_info *ufsi,
89 struct buffer_head *bh, __fs32 *v,
90 Indirect *from, Indirect *to)
91{
92 Indirect *p;
93 unsigned seq;
94 to->bh = bh;
95 do {
96 seq = read_seqbegin(&ufsi->meta_lock);
97 to->key32 = *(__fs32 *)(to->p = v);
98 for (p = from; p <= to && p->key32 == *(__fs32 *)p->p; p++)
99 ;
100 } while (read_seqretry(&ufsi->meta_lock, seq));
101 return (p > to);
102}
103
104static inline int grow_chain64(struct ufs_inode_info *ufsi,
105 struct buffer_head *bh, __fs64 *v,
106 Indirect *from, Indirect *to)
107{
108 Indirect *p;
109 unsigned seq;
110 to->bh = bh;
111 do {
112 seq = read_seqbegin(&ufsi->meta_lock);
113 to->key64 = *(__fs64 *)(to->p = v);
114 for (p = from; p <= to && p->key64 == *(__fs64 *)p->p; p++)
115 ;
116 } while (read_seqretry(&ufsi->meta_lock, seq));
117 return (p > to);
118}
119
120/*
121 * Returns the location of the fragment from
122 * the beginning of the filesystem.
123 */
124
125static u64 ufs_frag_map(struct inode *inode, unsigned offsets[4], int depth)
126{
127 struct ufs_inode_info *ufsi = UFS_I(inode);
128 struct super_block *sb = inode->i_sb;
129 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
130 u64 mask = (u64) uspi->s_apbmask>>uspi->s_fpbshift;
131 int shift = uspi->s_apbshift-uspi->s_fpbshift;
132 Indirect chain[4], *q = chain;
133 unsigned *p;
134 unsigned flags = UFS_SB(sb)->s_flags;
135 u64 res = 0;
136
137 UFSD(": uspi->s_fpbshift = %d ,uspi->s_apbmask = %x, mask=%llx\n",
138 uspi->s_fpbshift, uspi->s_apbmask,
139 (unsigned long long)mask);
140
141 if (depth == 0)
142 goto no_block;
143
144again:
145 p = offsets;
146
147 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
148 goto ufs2;
149
150 if (!grow_chain32(ufsi, NULL, &ufsi->i_u1.i_data[*p++], chain, q))
151 goto changed;
152 if (!q->key32)
153 goto no_block;
154 while (--depth) {
155 __fs32 *ptr;
156 struct buffer_head *bh;
157 unsigned n = *p++;
158
159 bh = sb_bread(sb, uspi->s_sbbase +
160 fs32_to_cpu(sb, q->key32) + (n>>shift));
161 if (!bh)
162 goto no_block;
163 ptr = (__fs32 *)bh->b_data + (n & mask);
164 if (!grow_chain32(ufsi, bh, ptr, chain, ++q))
165 goto changed;
166 if (!q->key32)
167 goto no_block;
168 }
169 res = fs32_to_cpu(sb, q->key32);
170 goto found;
171
172ufs2:
173 if (!grow_chain64(ufsi, NULL, &ufsi->i_u1.u2_i_data[*p++], chain, q))
174 goto changed;
175 if (!q->key64)
176 goto no_block;
177
178 while (--depth) {
179 __fs64 *ptr;
180 struct buffer_head *bh;
181 unsigned n = *p++;
182
183 bh = sb_bread(sb, uspi->s_sbbase +
184 fs64_to_cpu(sb, q->key64) + (n>>shift));
185 if (!bh)
186 goto no_block;
187 ptr = (__fs64 *)bh->b_data + (n & mask);
188 if (!grow_chain64(ufsi, bh, ptr, chain, ++q))
189 goto changed;
190 if (!q->key64)
191 goto no_block;
192 }
193 res = fs64_to_cpu(sb, q->key64);
194found:
195 res += uspi->s_sbbase;
196no_block:
197 while (q > chain) {
198 brelse(q->bh);
199 q--;
200 }
201 return res;
202
203changed:
204 while (q > chain) {
205 brelse(q->bh);
206 q--;
207 }
208 goto again;
209}
210
211/*
212 * Unpacking tails: we have a file with partial final block and
213 * we had been asked to extend it. If the fragment being written
214 * is within the same block, we need to extend the tail just to cover
215 * that fragment. Otherwise the tail is extended to full block.
216 *
217 * Note that we might need to create a _new_ tail, but that will
218 * be handled elsewhere; this is strictly for resizing old
219 * ones.
220 */
221static bool
222ufs_extend_tail(struct inode *inode, u64 writes_to,
223 int *err, struct page *locked_page)
224{
225 struct ufs_inode_info *ufsi = UFS_I(inode);
226 struct super_block *sb = inode->i_sb;
227 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
228 unsigned lastfrag = ufsi->i_lastfrag; /* it's a short file, so unsigned is enough */
229 unsigned block = ufs_fragstoblks(lastfrag);
230 unsigned new_size;
231 void *p;
232 u64 tmp;
233
234 if (writes_to < (lastfrag | uspi->s_fpbmask))
235 new_size = (writes_to & uspi->s_fpbmask) + 1;
236 else
237 new_size = uspi->s_fpb;
238
239 p = ufs_get_direct_data_ptr(uspi, ufsi, block);
240 tmp = ufs_new_fragments(inode, p, lastfrag, ufs_data_ptr_to_cpu(sb, p),
241 new_size - (lastfrag & uspi->s_fpbmask), err,
242 locked_page);
243 return tmp != 0;
244}
245
246/**
247 * ufs_inode_getfrag() - allocate new fragment(s)
248 * @inode: pointer to inode
249 * @index: number of block pointer within the inode's array.
250 * @new_fragment: number of new allocated fragment(s)
251 * @err: we set it if something wrong
252 * @new: we set it if we allocate new block
253 * @locked_page: for ufs_new_fragments()
254 */
255static u64
256ufs_inode_getfrag(struct inode *inode, unsigned index,
257 sector_t new_fragment, int *err,
258 int *new, struct page *locked_page)
259{
260 struct ufs_inode_info *ufsi = UFS_I(inode);
261 struct super_block *sb = inode->i_sb;
262 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
263 u64 tmp, goal, lastfrag;
264 unsigned nfrags = uspi->s_fpb;
265 void *p;
266
267 /* TODO : to be done for write support
268 if ( (flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
269 goto ufs2;
270 */
271
272 p = ufs_get_direct_data_ptr(uspi, ufsi, index);
273 tmp = ufs_data_ptr_to_cpu(sb, p);
274 if (tmp)
275 goto out;
276
277 lastfrag = ufsi->i_lastfrag;
278
279 /* will that be a new tail? */
280 if (new_fragment < UFS_NDIR_FRAGMENT && new_fragment >= lastfrag)
281 nfrags = (new_fragment & uspi->s_fpbmask) + 1;
282
283 goal = 0;
284 if (index) {
285 goal = ufs_data_ptr_to_cpu(sb,
286 ufs_get_direct_data_ptr(uspi, ufsi, index - 1));
287 if (goal)
288 goal += uspi->s_fpb;
289 }
290 tmp = ufs_new_fragments(inode, p, ufs_blknum(new_fragment),
291 goal, nfrags, err, locked_page);
292
293 if (!tmp) {
294 *err = -ENOSPC;
295 return 0;
296 }
297
298 if (new)
299 *new = 1;
300 inode_set_ctime_current(inode);
301 if (IS_SYNC(inode))
302 ufs_sync_inode (inode);
303 mark_inode_dirty(inode);
304out:
305 return tmp + uspi->s_sbbase;
306
307 /* This part : To be implemented ....
308 Required only for writing, not required for READ-ONLY.
309ufs2:
310
311 u2_block = ufs_fragstoblks(fragment);
312 u2_blockoff = ufs_fragnum(fragment);
313 p = ufsi->i_u1.u2_i_data + block;
314 goal = 0;
315
316repeat2:
317 tmp = fs32_to_cpu(sb, *p);
318 lastfrag = ufsi->i_lastfrag;
319
320 */
321}
322
323/**
324 * ufs_inode_getblock() - allocate new block
325 * @inode: pointer to inode
326 * @ind_block: block number of the indirect block
327 * @index: number of pointer within the indirect block
328 * @new_fragment: number of new allocated fragment
329 * (block will hold this fragment and also uspi->s_fpb-1)
330 * @err: see ufs_inode_getfrag()
331 * @new: see ufs_inode_getfrag()
332 * @locked_page: see ufs_inode_getfrag()
333 */
334static u64
335ufs_inode_getblock(struct inode *inode, u64 ind_block,
336 unsigned index, sector_t new_fragment, int *err,
337 int *new, struct page *locked_page)
338{
339 struct super_block *sb = inode->i_sb;
340 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
341 int shift = uspi->s_apbshift - uspi->s_fpbshift;
342 u64 tmp = 0, goal;
343 struct buffer_head *bh;
344 void *p;
345
346 if (!ind_block)
347 return 0;
348
349 bh = sb_bread(sb, ind_block + (index >> shift));
350 if (unlikely(!bh)) {
351 *err = -EIO;
352 return 0;
353 }
354
355 index &= uspi->s_apbmask >> uspi->s_fpbshift;
356 if (uspi->fs_magic == UFS2_MAGIC)
357 p = (__fs64 *)bh->b_data + index;
358 else
359 p = (__fs32 *)bh->b_data + index;
360
361 tmp = ufs_data_ptr_to_cpu(sb, p);
362 if (tmp)
363 goto out;
364
365 if (index && (uspi->fs_magic == UFS2_MAGIC ?
366 (tmp = fs64_to_cpu(sb, ((__fs64 *)bh->b_data)[index-1])) :
367 (tmp = fs32_to_cpu(sb, ((__fs32 *)bh->b_data)[index-1]))))
368 goal = tmp + uspi->s_fpb;
369 else
370 goal = bh->b_blocknr + uspi->s_fpb;
371 tmp = ufs_new_fragments(inode, p, ufs_blknum(new_fragment), goal,
372 uspi->s_fpb, err, locked_page);
373 if (!tmp)
374 goto out;
375
376 if (new)
377 *new = 1;
378
379 mark_buffer_dirty(bh);
380 if (IS_SYNC(inode))
381 sync_dirty_buffer(bh);
382 inode_set_ctime_current(inode);
383 mark_inode_dirty(inode);
384out:
385 brelse (bh);
386 UFSD("EXIT\n");
387 if (tmp)
388 tmp += uspi->s_sbbase;
389 return tmp;
390}
391
392/**
393 * ufs_getfrag_block() - `get_block_t' function, interface between UFS and
394 * read_folio, writepages and so on
395 */
396
397static int ufs_getfrag_block(struct inode *inode, sector_t fragment, struct buffer_head *bh_result, int create)
398{
399 struct super_block *sb = inode->i_sb;
400 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
401 int err = 0, new = 0;
402 unsigned offsets[4];
403 int depth = ufs_block_to_path(inode, fragment >> uspi->s_fpbshift, offsets);
404 u64 phys64 = 0;
405 unsigned frag = fragment & uspi->s_fpbmask;
406
407 phys64 = ufs_frag_map(inode, offsets, depth);
408 if (!create)
409 goto done;
410
411 if (phys64) {
412 if (fragment >= UFS_NDIR_FRAGMENT)
413 goto done;
414 read_seqlock_excl(&UFS_I(inode)->meta_lock);
415 if (fragment < UFS_I(inode)->i_lastfrag) {
416 read_sequnlock_excl(&UFS_I(inode)->meta_lock);
417 goto done;
418 }
419 read_sequnlock_excl(&UFS_I(inode)->meta_lock);
420 }
421 /* This code entered only while writing ....? */
422
423 mutex_lock(&UFS_I(inode)->truncate_mutex);
424
425 UFSD("ENTER, ino %lu, fragment %llu\n", inode->i_ino, (unsigned long long)fragment);
426 if (unlikely(!depth)) {
427 ufs_warning(sb, "ufs_get_block", "block > big");
428 err = -EIO;
429 goto out;
430 }
431
432 if (UFS_I(inode)->i_lastfrag < UFS_NDIR_FRAGMENT) {
433 unsigned lastfrag = UFS_I(inode)->i_lastfrag;
434 unsigned tailfrags = lastfrag & uspi->s_fpbmask;
435 if (tailfrags && fragment >= lastfrag) {
436 if (!ufs_extend_tail(inode, fragment,
437 &err, bh_result->b_page))
438 goto out;
439 }
440 }
441
442 if (depth == 1) {
443 phys64 = ufs_inode_getfrag(inode, offsets[0], fragment,
444 &err, &new, bh_result->b_page);
445 } else {
446 int i;
447 phys64 = ufs_inode_getfrag(inode, offsets[0], fragment,
448 &err, NULL, NULL);
449 for (i = 1; i < depth - 1; i++)
450 phys64 = ufs_inode_getblock(inode, phys64, offsets[i],
451 fragment, &err, NULL, NULL);
452 phys64 = ufs_inode_getblock(inode, phys64, offsets[depth - 1],
453 fragment, &err, &new, bh_result->b_page);
454 }
455out:
456 if (phys64) {
457 phys64 += frag;
458 map_bh(bh_result, sb, phys64);
459 if (new)
460 set_buffer_new(bh_result);
461 }
462 mutex_unlock(&UFS_I(inode)->truncate_mutex);
463 return err;
464
465done:
466 if (phys64)
467 map_bh(bh_result, sb, phys64 + frag);
468 return 0;
469}
470
471static int ufs_writepages(struct address_space *mapping,
472 struct writeback_control *wbc)
473{
474 return mpage_writepages(mapping, wbc, ufs_getfrag_block);
475}
476
477static int ufs_read_folio(struct file *file, struct folio *folio)
478{
479 return block_read_full_folio(folio, ufs_getfrag_block);
480}
481
482int ufs_prepare_chunk(struct page *page, loff_t pos, unsigned len)
483{
484 return __block_write_begin(page, pos, len, ufs_getfrag_block);
485}
486
487static void ufs_truncate_blocks(struct inode *);
488
489static void ufs_write_failed(struct address_space *mapping, loff_t to)
490{
491 struct inode *inode = mapping->host;
492
493 if (to > inode->i_size) {
494 truncate_pagecache(inode, inode->i_size);
495 ufs_truncate_blocks(inode);
496 }
497}
498
499static int ufs_write_begin(struct file *file, struct address_space *mapping,
500 loff_t pos, unsigned len,
501 struct page **pagep, void **fsdata)
502{
503 int ret;
504
505 ret = block_write_begin(mapping, pos, len, pagep, ufs_getfrag_block);
506 if (unlikely(ret))
507 ufs_write_failed(mapping, pos + len);
508
509 return ret;
510}
511
512static int ufs_write_end(struct file *file, struct address_space *mapping,
513 loff_t pos, unsigned len, unsigned copied,
514 struct page *page, void *fsdata)
515{
516 int ret;
517
518 ret = generic_write_end(file, mapping, pos, len, copied, page, fsdata);
519 if (ret < len)
520 ufs_write_failed(mapping, pos + len);
521 return ret;
522}
523
524static sector_t ufs_bmap(struct address_space *mapping, sector_t block)
525{
526 return generic_block_bmap(mapping,block,ufs_getfrag_block);
527}
528
529const struct address_space_operations ufs_aops = {
530 .dirty_folio = block_dirty_folio,
531 .invalidate_folio = block_invalidate_folio,
532 .read_folio = ufs_read_folio,
533 .writepages = ufs_writepages,
534 .write_begin = ufs_write_begin,
535 .write_end = ufs_write_end,
536 .migrate_folio = buffer_migrate_folio,
537 .bmap = ufs_bmap
538};
539
540static void ufs_set_inode_ops(struct inode *inode)
541{
542 if (S_ISREG(inode->i_mode)) {
543 inode->i_op = &ufs_file_inode_operations;
544 inode->i_fop = &ufs_file_operations;
545 inode->i_mapping->a_ops = &ufs_aops;
546 } else if (S_ISDIR(inode->i_mode)) {
547 inode->i_op = &ufs_dir_inode_operations;
548 inode->i_fop = &ufs_dir_operations;
549 inode->i_mapping->a_ops = &ufs_aops;
550 } else if (S_ISLNK(inode->i_mode)) {
551 if (!inode->i_blocks) {
552 inode->i_link = (char *)UFS_I(inode)->i_u1.i_symlink;
553 inode->i_op = &simple_symlink_inode_operations;
554 } else {
555 inode->i_mapping->a_ops = &ufs_aops;
556 inode->i_op = &page_symlink_inode_operations;
557 inode_nohighmem(inode);
558 }
559 } else
560 init_special_inode(inode, inode->i_mode,
561 ufs_get_inode_dev(inode->i_sb, UFS_I(inode)));
562}
563
564static int ufs1_read_inode(struct inode *inode, struct ufs_inode *ufs_inode)
565{
566 struct ufs_inode_info *ufsi = UFS_I(inode);
567 struct super_block *sb = inode->i_sb;
568 umode_t mode;
569
570 /*
571 * Copy data to the in-core inode.
572 */
573 inode->i_mode = mode = fs16_to_cpu(sb, ufs_inode->ui_mode);
574 set_nlink(inode, fs16_to_cpu(sb, ufs_inode->ui_nlink));
575 if (inode->i_nlink == 0)
576 return -ESTALE;
577
578 /*
579 * Linux now has 32-bit uid and gid, so we can support EFT.
580 */
581 i_uid_write(inode, ufs_get_inode_uid(sb, ufs_inode));
582 i_gid_write(inode, ufs_get_inode_gid(sb, ufs_inode));
583
584 inode->i_size = fs64_to_cpu(sb, ufs_inode->ui_size);
585 inode_set_atime(inode,
586 (signed)fs32_to_cpu(sb, ufs_inode->ui_atime.tv_sec),
587 0);
588 inode_set_ctime(inode,
589 (signed)fs32_to_cpu(sb, ufs_inode->ui_ctime.tv_sec),
590 0);
591 inode_set_mtime(inode,
592 (signed)fs32_to_cpu(sb, ufs_inode->ui_mtime.tv_sec),
593 0);
594 inode->i_blocks = fs32_to_cpu(sb, ufs_inode->ui_blocks);
595 inode->i_generation = fs32_to_cpu(sb, ufs_inode->ui_gen);
596 ufsi->i_flags = fs32_to_cpu(sb, ufs_inode->ui_flags);
597 ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow);
598 ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag);
599
600
601 if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) {
602 memcpy(ufsi->i_u1.i_data, &ufs_inode->ui_u2.ui_addr,
603 sizeof(ufs_inode->ui_u2.ui_addr));
604 } else {
605 memcpy(ufsi->i_u1.i_symlink, ufs_inode->ui_u2.ui_symlink,
606 sizeof(ufs_inode->ui_u2.ui_symlink) - 1);
607 ufsi->i_u1.i_symlink[sizeof(ufs_inode->ui_u2.ui_symlink) - 1] = 0;
608 }
609 return 0;
610}
611
612static int ufs2_read_inode(struct inode *inode, struct ufs2_inode *ufs2_inode)
613{
614 struct ufs_inode_info *ufsi = UFS_I(inode);
615 struct super_block *sb = inode->i_sb;
616 umode_t mode;
617
618 UFSD("Reading ufs2 inode, ino %lu\n", inode->i_ino);
619 /*
620 * Copy data to the in-core inode.
621 */
622 inode->i_mode = mode = fs16_to_cpu(sb, ufs2_inode->ui_mode);
623 set_nlink(inode, fs16_to_cpu(sb, ufs2_inode->ui_nlink));
624 if (inode->i_nlink == 0)
625 return -ESTALE;
626
627 /*
628 * Linux now has 32-bit uid and gid, so we can support EFT.
629 */
630 i_uid_write(inode, fs32_to_cpu(sb, ufs2_inode->ui_uid));
631 i_gid_write(inode, fs32_to_cpu(sb, ufs2_inode->ui_gid));
632
633 inode->i_size = fs64_to_cpu(sb, ufs2_inode->ui_size);
634 inode_set_atime(inode, fs64_to_cpu(sb, ufs2_inode->ui_atime),
635 fs32_to_cpu(sb, ufs2_inode->ui_atimensec));
636 inode_set_ctime(inode, fs64_to_cpu(sb, ufs2_inode->ui_ctime),
637 fs32_to_cpu(sb, ufs2_inode->ui_ctimensec));
638 inode_set_mtime(inode, fs64_to_cpu(sb, ufs2_inode->ui_mtime),
639 fs32_to_cpu(sb, ufs2_inode->ui_mtimensec));
640 inode->i_blocks = fs64_to_cpu(sb, ufs2_inode->ui_blocks);
641 inode->i_generation = fs32_to_cpu(sb, ufs2_inode->ui_gen);
642 ufsi->i_flags = fs32_to_cpu(sb, ufs2_inode->ui_flags);
643 /*
644 ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow);
645 ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag);
646 */
647
648 if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) {
649 memcpy(ufsi->i_u1.u2_i_data, &ufs2_inode->ui_u2.ui_addr,
650 sizeof(ufs2_inode->ui_u2.ui_addr));
651 } else {
652 memcpy(ufsi->i_u1.i_symlink, ufs2_inode->ui_u2.ui_symlink,
653 sizeof(ufs2_inode->ui_u2.ui_symlink) - 1);
654 ufsi->i_u1.i_symlink[sizeof(ufs2_inode->ui_u2.ui_symlink) - 1] = 0;
655 }
656 return 0;
657}
658
659struct inode *ufs_iget(struct super_block *sb, unsigned long ino)
660{
661 struct ufs_inode_info *ufsi;
662 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
663 struct buffer_head * bh;
664 struct inode *inode;
665 int err = -EIO;
666
667 UFSD("ENTER, ino %lu\n", ino);
668
669 if (ino < UFS_ROOTINO || ino > (uspi->s_ncg * uspi->s_ipg)) {
670 ufs_warning(sb, "ufs_read_inode", "bad inode number (%lu)\n",
671 ino);
672 return ERR_PTR(-EIO);
673 }
674
675 inode = iget_locked(sb, ino);
676 if (!inode)
677 return ERR_PTR(-ENOMEM);
678 if (!(inode->i_state & I_NEW))
679 return inode;
680
681 ufsi = UFS_I(inode);
682
683 bh = sb_bread(sb, uspi->s_sbbase + ufs_inotofsba(inode->i_ino));
684 if (!bh) {
685 ufs_warning(sb, "ufs_read_inode", "unable to read inode %lu\n",
686 inode->i_ino);
687 goto bad_inode;
688 }
689 if ((UFS_SB(sb)->s_flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
690 struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data;
691
692 err = ufs2_read_inode(inode,
693 ufs2_inode + ufs_inotofsbo(inode->i_ino));
694 } else {
695 struct ufs_inode *ufs_inode = (struct ufs_inode *)bh->b_data;
696
697 err = ufs1_read_inode(inode,
698 ufs_inode + ufs_inotofsbo(inode->i_ino));
699 }
700 brelse(bh);
701 if (err)
702 goto bad_inode;
703
704 inode_inc_iversion(inode);
705 ufsi->i_lastfrag =
706 (inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift;
707 ufsi->i_dir_start_lookup = 0;
708 ufsi->i_osync = 0;
709
710 ufs_set_inode_ops(inode);
711
712 UFSD("EXIT\n");
713 unlock_new_inode(inode);
714 return inode;
715
716bad_inode:
717 iget_failed(inode);
718 return ERR_PTR(err);
719}
720
721static void ufs1_update_inode(struct inode *inode, struct ufs_inode *ufs_inode)
722{
723 struct super_block *sb = inode->i_sb;
724 struct ufs_inode_info *ufsi = UFS_I(inode);
725
726 ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode);
727 ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink);
728
729 ufs_set_inode_uid(sb, ufs_inode, i_uid_read(inode));
730 ufs_set_inode_gid(sb, ufs_inode, i_gid_read(inode));
731
732 ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size);
733 ufs_inode->ui_atime.tv_sec = cpu_to_fs32(sb,
734 inode_get_atime_sec(inode));
735 ufs_inode->ui_atime.tv_usec = 0;
736 ufs_inode->ui_ctime.tv_sec = cpu_to_fs32(sb,
737 inode_get_ctime_sec(inode));
738 ufs_inode->ui_ctime.tv_usec = 0;
739 ufs_inode->ui_mtime.tv_sec = cpu_to_fs32(sb,
740 inode_get_mtime_sec(inode));
741 ufs_inode->ui_mtime.tv_usec = 0;
742 ufs_inode->ui_blocks = cpu_to_fs32(sb, inode->i_blocks);
743 ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags);
744 ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation);
745
746 if ((UFS_SB(sb)->s_flags & UFS_UID_MASK) == UFS_UID_EFT) {
747 ufs_inode->ui_u3.ui_sun.ui_shadow = cpu_to_fs32(sb, ufsi->i_shadow);
748 ufs_inode->ui_u3.ui_sun.ui_oeftflag = cpu_to_fs32(sb, ufsi->i_oeftflag);
749 }
750
751 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
752 /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */
753 ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.i_data[0];
754 } else if (inode->i_blocks) {
755 memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.i_data,
756 sizeof(ufs_inode->ui_u2.ui_addr));
757 }
758 else {
759 memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink,
760 sizeof(ufs_inode->ui_u2.ui_symlink));
761 }
762
763 if (!inode->i_nlink)
764 memset (ufs_inode, 0, sizeof(struct ufs_inode));
765}
766
767static void ufs2_update_inode(struct inode *inode, struct ufs2_inode *ufs_inode)
768{
769 struct super_block *sb = inode->i_sb;
770 struct ufs_inode_info *ufsi = UFS_I(inode);
771
772 UFSD("ENTER\n");
773 ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode);
774 ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink);
775
776 ufs_inode->ui_uid = cpu_to_fs32(sb, i_uid_read(inode));
777 ufs_inode->ui_gid = cpu_to_fs32(sb, i_gid_read(inode));
778
779 ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size);
780 ufs_inode->ui_atime = cpu_to_fs64(sb, inode_get_atime_sec(inode));
781 ufs_inode->ui_atimensec = cpu_to_fs32(sb,
782 inode_get_atime_nsec(inode));
783 ufs_inode->ui_ctime = cpu_to_fs64(sb, inode_get_ctime_sec(inode));
784 ufs_inode->ui_ctimensec = cpu_to_fs32(sb,
785 inode_get_ctime_nsec(inode));
786 ufs_inode->ui_mtime = cpu_to_fs64(sb, inode_get_mtime_sec(inode));
787 ufs_inode->ui_mtimensec = cpu_to_fs32(sb,
788 inode_get_mtime_nsec(inode));
789
790 ufs_inode->ui_blocks = cpu_to_fs64(sb, inode->i_blocks);
791 ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags);
792 ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation);
793
794 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
795 /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */
796 ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.u2_i_data[0];
797 } else if (inode->i_blocks) {
798 memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.u2_i_data,
799 sizeof(ufs_inode->ui_u2.ui_addr));
800 } else {
801 memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink,
802 sizeof(ufs_inode->ui_u2.ui_symlink));
803 }
804
805 if (!inode->i_nlink)
806 memset (ufs_inode, 0, sizeof(struct ufs2_inode));
807 UFSD("EXIT\n");
808}
809
810static int ufs_update_inode(struct inode * inode, int do_sync)
811{
812 struct super_block *sb = inode->i_sb;
813 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
814 struct buffer_head * bh;
815
816 UFSD("ENTER, ino %lu\n", inode->i_ino);
817
818 if (inode->i_ino < UFS_ROOTINO ||
819 inode->i_ino > (uspi->s_ncg * uspi->s_ipg)) {
820 ufs_warning (sb, "ufs_read_inode", "bad inode number (%lu)\n", inode->i_ino);
821 return -1;
822 }
823
824 bh = sb_bread(sb, ufs_inotofsba(inode->i_ino));
825 if (!bh) {
826 ufs_warning (sb, "ufs_read_inode", "unable to read inode %lu\n", inode->i_ino);
827 return -1;
828 }
829 if (uspi->fs_magic == UFS2_MAGIC) {
830 struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data;
831
832 ufs2_update_inode(inode,
833 ufs2_inode + ufs_inotofsbo(inode->i_ino));
834 } else {
835 struct ufs_inode *ufs_inode = (struct ufs_inode *) bh->b_data;
836
837 ufs1_update_inode(inode, ufs_inode + ufs_inotofsbo(inode->i_ino));
838 }
839
840 mark_buffer_dirty(bh);
841 if (do_sync)
842 sync_dirty_buffer(bh);
843 brelse (bh);
844
845 UFSD("EXIT\n");
846 return 0;
847}
848
849int ufs_write_inode(struct inode *inode, struct writeback_control *wbc)
850{
851 return ufs_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL);
852}
853
854int ufs_sync_inode (struct inode *inode)
855{
856 return ufs_update_inode (inode, 1);
857}
858
859void ufs_evict_inode(struct inode * inode)
860{
861 int want_delete = 0;
862
863 if (!inode->i_nlink && !is_bad_inode(inode))
864 want_delete = 1;
865
866 truncate_inode_pages_final(&inode->i_data);
867 if (want_delete) {
868 inode->i_size = 0;
869 if (inode->i_blocks &&
870 (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
871 S_ISLNK(inode->i_mode)))
872 ufs_truncate_blocks(inode);
873 ufs_update_inode(inode, inode_needs_sync(inode));
874 }
875
876 invalidate_inode_buffers(inode);
877 clear_inode(inode);
878
879 if (want_delete)
880 ufs_free_inode(inode);
881}
882
883struct to_free {
884 struct inode *inode;
885 u64 to;
886 unsigned count;
887};
888
889static inline void free_data(struct to_free *ctx, u64 from, unsigned count)
890{
891 if (ctx->count && ctx->to != from) {
892 ufs_free_blocks(ctx->inode, ctx->to - ctx->count, ctx->count);
893 ctx->count = 0;
894 }
895 ctx->count += count;
896 ctx->to = from + count;
897}
898
899#define DIRECT_FRAGMENT ((inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift)
900
901static void ufs_trunc_direct(struct inode *inode)
902{
903 struct ufs_inode_info *ufsi = UFS_I(inode);
904 struct super_block * sb;
905 struct ufs_sb_private_info * uspi;
906 void *p;
907 u64 frag1, frag2, frag3, frag4, block1, block2;
908 struct to_free ctx = {.inode = inode};
909 unsigned i, tmp;
910
911 UFSD("ENTER: ino %lu\n", inode->i_ino);
912
913 sb = inode->i_sb;
914 uspi = UFS_SB(sb)->s_uspi;
915
916 frag1 = DIRECT_FRAGMENT;
917 frag4 = min_t(u64, UFS_NDIR_FRAGMENT, ufsi->i_lastfrag);
918 frag2 = ((frag1 & uspi->s_fpbmask) ? ((frag1 | uspi->s_fpbmask) + 1) : frag1);
919 frag3 = frag4 & ~uspi->s_fpbmask;
920 block1 = block2 = 0;
921 if (frag2 > frag3) {
922 frag2 = frag4;
923 frag3 = frag4 = 0;
924 } else if (frag2 < frag3) {
925 block1 = ufs_fragstoblks (frag2);
926 block2 = ufs_fragstoblks (frag3);
927 }
928
929 UFSD("ino %lu, frag1 %llu, frag2 %llu, block1 %llu, block2 %llu,"
930 " frag3 %llu, frag4 %llu\n", inode->i_ino,
931 (unsigned long long)frag1, (unsigned long long)frag2,
932 (unsigned long long)block1, (unsigned long long)block2,
933 (unsigned long long)frag3, (unsigned long long)frag4);
934
935 if (frag1 >= frag2)
936 goto next1;
937
938 /*
939 * Free first free fragments
940 */
941 p = ufs_get_direct_data_ptr(uspi, ufsi, ufs_fragstoblks(frag1));
942 tmp = ufs_data_ptr_to_cpu(sb, p);
943 if (!tmp )
944 ufs_panic (sb, "ufs_trunc_direct", "internal error");
945 frag2 -= frag1;
946 frag1 = ufs_fragnum (frag1);
947
948 ufs_free_fragments(inode, tmp + frag1, frag2);
949
950next1:
951 /*
952 * Free whole blocks
953 */
954 for (i = block1 ; i < block2; i++) {
955 p = ufs_get_direct_data_ptr(uspi, ufsi, i);
956 tmp = ufs_data_ptr_to_cpu(sb, p);
957 if (!tmp)
958 continue;
959 write_seqlock(&ufsi->meta_lock);
960 ufs_data_ptr_clear(uspi, p);
961 write_sequnlock(&ufsi->meta_lock);
962
963 free_data(&ctx, tmp, uspi->s_fpb);
964 }
965
966 free_data(&ctx, 0, 0);
967
968 if (frag3 >= frag4)
969 goto next3;
970
971 /*
972 * Free last free fragments
973 */
974 p = ufs_get_direct_data_ptr(uspi, ufsi, ufs_fragstoblks(frag3));
975 tmp = ufs_data_ptr_to_cpu(sb, p);
976 if (!tmp )
977 ufs_panic(sb, "ufs_truncate_direct", "internal error");
978 frag4 = ufs_fragnum (frag4);
979 write_seqlock(&ufsi->meta_lock);
980 ufs_data_ptr_clear(uspi, p);
981 write_sequnlock(&ufsi->meta_lock);
982
983 ufs_free_fragments (inode, tmp, frag4);
984 next3:
985
986 UFSD("EXIT: ino %lu\n", inode->i_ino);
987}
988
989static void free_full_branch(struct inode *inode, u64 ind_block, int depth)
990{
991 struct super_block *sb = inode->i_sb;
992 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
993 struct ufs_buffer_head *ubh = ubh_bread(sb, ind_block, uspi->s_bsize);
994 unsigned i;
995
996 if (!ubh)
997 return;
998
999 if (--depth) {
1000 for (i = 0; i < uspi->s_apb; i++) {
1001 void *p = ubh_get_data_ptr(uspi, ubh, i);
1002 u64 block = ufs_data_ptr_to_cpu(sb, p);
1003 if (block)
1004 free_full_branch(inode, block, depth);
1005 }
1006 } else {
1007 struct to_free ctx = {.inode = inode};
1008
1009 for (i = 0; i < uspi->s_apb; i++) {
1010 void *p = ubh_get_data_ptr(uspi, ubh, i);
1011 u64 block = ufs_data_ptr_to_cpu(sb, p);
1012 if (block)
1013 free_data(&ctx, block, uspi->s_fpb);
1014 }
1015 free_data(&ctx, 0, 0);
1016 }
1017
1018 ubh_bforget(ubh);
1019 ufs_free_blocks(inode, ind_block, uspi->s_fpb);
1020}
1021
1022static void free_branch_tail(struct inode *inode, unsigned from, struct ufs_buffer_head *ubh, int depth)
1023{
1024 struct super_block *sb = inode->i_sb;
1025 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
1026 unsigned i;
1027
1028 if (--depth) {
1029 for (i = from; i < uspi->s_apb ; i++) {
1030 void *p = ubh_get_data_ptr(uspi, ubh, i);
1031 u64 block = ufs_data_ptr_to_cpu(sb, p);
1032 if (block) {
1033 write_seqlock(&UFS_I(inode)->meta_lock);
1034 ufs_data_ptr_clear(uspi, p);
1035 write_sequnlock(&UFS_I(inode)->meta_lock);
1036 ubh_mark_buffer_dirty(ubh);
1037 free_full_branch(inode, block, depth);
1038 }
1039 }
1040 } else {
1041 struct to_free ctx = {.inode = inode};
1042
1043 for (i = from; i < uspi->s_apb; i++) {
1044 void *p = ubh_get_data_ptr(uspi, ubh, i);
1045 u64 block = ufs_data_ptr_to_cpu(sb, p);
1046 if (block) {
1047 write_seqlock(&UFS_I(inode)->meta_lock);
1048 ufs_data_ptr_clear(uspi, p);
1049 write_sequnlock(&UFS_I(inode)->meta_lock);
1050 ubh_mark_buffer_dirty(ubh);
1051 free_data(&ctx, block, uspi->s_fpb);
1052 }
1053 }
1054 free_data(&ctx, 0, 0);
1055 }
1056 if (IS_SYNC(inode) && ubh_buffer_dirty(ubh))
1057 ubh_sync_block(ubh);
1058 ubh_brelse(ubh);
1059}
1060
1061static int ufs_alloc_lastblock(struct inode *inode, loff_t size)
1062{
1063 int err = 0;
1064 struct super_block *sb = inode->i_sb;
1065 struct address_space *mapping = inode->i_mapping;
1066 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
1067 unsigned i, end;
1068 sector_t lastfrag;
1069 struct folio *folio;
1070 struct buffer_head *bh;
1071 u64 phys64;
1072
1073 lastfrag = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
1074
1075 if (!lastfrag)
1076 goto out;
1077
1078 lastfrag--;
1079
1080 folio = ufs_get_locked_folio(mapping, lastfrag >>
1081 (PAGE_SHIFT - inode->i_blkbits));
1082 if (IS_ERR(folio)) {
1083 err = -EIO;
1084 goto out;
1085 }
1086
1087 end = lastfrag & ((1 << (PAGE_SHIFT - inode->i_blkbits)) - 1);
1088 bh = folio_buffers(folio);
1089 for (i = 0; i < end; ++i)
1090 bh = bh->b_this_page;
1091
1092 err = ufs_getfrag_block(inode, lastfrag, bh, 1);
1093
1094 if (unlikely(err))
1095 goto out_unlock;
1096
1097 if (buffer_new(bh)) {
1098 clear_buffer_new(bh);
1099 clean_bdev_bh_alias(bh);
1100 /*
1101 * we do not zeroize fragment, because of
1102 * if it maped to hole, it already contains zeroes
1103 */
1104 set_buffer_uptodate(bh);
1105 mark_buffer_dirty(bh);
1106 folio_mark_dirty(folio);
1107 }
1108
1109 if (lastfrag >= UFS_IND_FRAGMENT) {
1110 end = uspi->s_fpb - ufs_fragnum(lastfrag) - 1;
1111 phys64 = bh->b_blocknr + 1;
1112 for (i = 0; i < end; ++i) {
1113 bh = sb_getblk(sb, i + phys64);
1114 lock_buffer(bh);
1115 memset(bh->b_data, 0, sb->s_blocksize);
1116 set_buffer_uptodate(bh);
1117 mark_buffer_dirty(bh);
1118 unlock_buffer(bh);
1119 sync_dirty_buffer(bh);
1120 brelse(bh);
1121 }
1122 }
1123out_unlock:
1124 ufs_put_locked_folio(folio);
1125out:
1126 return err;
1127}
1128
1129static void ufs_truncate_blocks(struct inode *inode)
1130{
1131 struct ufs_inode_info *ufsi = UFS_I(inode);
1132 struct super_block *sb = inode->i_sb;
1133 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
1134 unsigned offsets[4];
1135 int depth;
1136 int depth2;
1137 unsigned i;
1138 struct ufs_buffer_head *ubh[3];
1139 void *p;
1140 u64 block;
1141
1142 if (inode->i_size) {
1143 sector_t last = (inode->i_size - 1) >> uspi->s_bshift;
1144 depth = ufs_block_to_path(inode, last, offsets);
1145 if (!depth)
1146 return;
1147 } else {
1148 depth = 1;
1149 }
1150
1151 for (depth2 = depth - 1; depth2; depth2--)
1152 if (offsets[depth2] != uspi->s_apb - 1)
1153 break;
1154
1155 mutex_lock(&ufsi->truncate_mutex);
1156 if (depth == 1) {
1157 ufs_trunc_direct(inode);
1158 offsets[0] = UFS_IND_BLOCK;
1159 } else {
1160 /* get the blocks that should be partially emptied */
1161 p = ufs_get_direct_data_ptr(uspi, ufsi, offsets[0]++);
1162 for (i = 0; i < depth2; i++) {
1163 block = ufs_data_ptr_to_cpu(sb, p);
1164 if (!block)
1165 break;
1166 ubh[i] = ubh_bread(sb, block, uspi->s_bsize);
1167 if (!ubh[i]) {
1168 write_seqlock(&ufsi->meta_lock);
1169 ufs_data_ptr_clear(uspi, p);
1170 write_sequnlock(&ufsi->meta_lock);
1171 break;
1172 }
1173 p = ubh_get_data_ptr(uspi, ubh[i], offsets[i + 1]++);
1174 }
1175 while (i--)
1176 free_branch_tail(inode, offsets[i + 1], ubh[i], depth - i - 1);
1177 }
1178 for (i = offsets[0]; i <= UFS_TIND_BLOCK; i++) {
1179 p = ufs_get_direct_data_ptr(uspi, ufsi, i);
1180 block = ufs_data_ptr_to_cpu(sb, p);
1181 if (block) {
1182 write_seqlock(&ufsi->meta_lock);
1183 ufs_data_ptr_clear(uspi, p);
1184 write_sequnlock(&ufsi->meta_lock);
1185 free_full_branch(inode, block, i - UFS_IND_BLOCK + 1);
1186 }
1187 }
1188 read_seqlock_excl(&ufsi->meta_lock);
1189 ufsi->i_lastfrag = DIRECT_FRAGMENT;
1190 read_sequnlock_excl(&ufsi->meta_lock);
1191 mark_inode_dirty(inode);
1192 mutex_unlock(&ufsi->truncate_mutex);
1193}
1194
1195static int ufs_truncate(struct inode *inode, loff_t size)
1196{
1197 int err = 0;
1198
1199 UFSD("ENTER: ino %lu, i_size: %llu, old_i_size: %llu\n",
1200 inode->i_ino, (unsigned long long)size,
1201 (unsigned long long)i_size_read(inode));
1202
1203 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
1204 S_ISLNK(inode->i_mode)))
1205 return -EINVAL;
1206 if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
1207 return -EPERM;
1208
1209 err = ufs_alloc_lastblock(inode, size);
1210
1211 if (err)
1212 goto out;
1213
1214 block_truncate_page(inode->i_mapping, size, ufs_getfrag_block);
1215
1216 truncate_setsize(inode, size);
1217
1218 ufs_truncate_blocks(inode);
1219 inode_set_mtime_to_ts(inode, inode_set_ctime_current(inode));
1220 mark_inode_dirty(inode);
1221out:
1222 UFSD("EXIT: err %d\n", err);
1223 return err;
1224}
1225
1226int ufs_setattr(struct mnt_idmap *idmap, struct dentry *dentry,
1227 struct iattr *attr)
1228{
1229 struct inode *inode = d_inode(dentry);
1230 unsigned int ia_valid = attr->ia_valid;
1231 int error;
1232
1233 error = setattr_prepare(&nop_mnt_idmap, dentry, attr);
1234 if (error)
1235 return error;
1236
1237 if (ia_valid & ATTR_SIZE && attr->ia_size != inode->i_size) {
1238 error = ufs_truncate(inode, attr->ia_size);
1239 if (error)
1240 return error;
1241 }
1242
1243 setattr_copy(&nop_mnt_idmap, inode, attr);
1244 mark_inode_dirty(inode);
1245 return 0;
1246}
1247
1248const struct inode_operations ufs_file_inode_operations = {
1249 .setattr = ufs_setattr,
1250};
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/mpage.h>
39#include <linux/writeback.h>
40#include <linux/iversion.h>
41
42#include "ufs_fs.h"
43#include "ufs.h"
44#include "swab.h"
45#include "util.h"
46
47static int ufs_block_to_path(struct inode *inode, sector_t i_block, unsigned offsets[4])
48{
49 struct ufs_sb_private_info *uspi = UFS_SB(inode->i_sb)->s_uspi;
50 int ptrs = uspi->s_apb;
51 int ptrs_bits = uspi->s_apbshift;
52 const long direct_blocks = UFS_NDADDR,
53 indirect_blocks = ptrs,
54 double_blocks = (1 << (ptrs_bits * 2));
55 int n = 0;
56
57
58 UFSD("ptrs=uspi->s_apb = %d,double_blocks=%ld \n",ptrs,double_blocks);
59 if (i_block < direct_blocks) {
60 offsets[n++] = i_block;
61 } else if ((i_block -= direct_blocks) < indirect_blocks) {
62 offsets[n++] = UFS_IND_BLOCK;
63 offsets[n++] = i_block;
64 } else if ((i_block -= indirect_blocks) < double_blocks) {
65 offsets[n++] = UFS_DIND_BLOCK;
66 offsets[n++] = i_block >> ptrs_bits;
67 offsets[n++] = i_block & (ptrs - 1);
68 } else if (((i_block -= double_blocks) >> (ptrs_bits * 2)) < ptrs) {
69 offsets[n++] = UFS_TIND_BLOCK;
70 offsets[n++] = i_block >> (ptrs_bits * 2);
71 offsets[n++] = (i_block >> ptrs_bits) & (ptrs - 1);
72 offsets[n++] = i_block & (ptrs - 1);
73 } else {
74 ufs_warning(inode->i_sb, "ufs_block_to_path", "block > big");
75 }
76 return n;
77}
78
79typedef struct {
80 void *p;
81 union {
82 __fs32 key32;
83 __fs64 key64;
84 };
85 struct buffer_head *bh;
86} Indirect;
87
88static inline int grow_chain32(struct ufs_inode_info *ufsi,
89 struct buffer_head *bh, __fs32 *v,
90 Indirect *from, Indirect *to)
91{
92 Indirect *p;
93 unsigned seq;
94 to->bh = bh;
95 do {
96 seq = read_seqbegin(&ufsi->meta_lock);
97 to->key32 = *(__fs32 *)(to->p = v);
98 for (p = from; p <= to && p->key32 == *(__fs32 *)p->p; p++)
99 ;
100 } while (read_seqretry(&ufsi->meta_lock, seq));
101 return (p > to);
102}
103
104static inline int grow_chain64(struct ufs_inode_info *ufsi,
105 struct buffer_head *bh, __fs64 *v,
106 Indirect *from, Indirect *to)
107{
108 Indirect *p;
109 unsigned seq;
110 to->bh = bh;
111 do {
112 seq = read_seqbegin(&ufsi->meta_lock);
113 to->key64 = *(__fs64 *)(to->p = v);
114 for (p = from; p <= to && p->key64 == *(__fs64 *)p->p; p++)
115 ;
116 } while (read_seqretry(&ufsi->meta_lock, seq));
117 return (p > to);
118}
119
120/*
121 * Returns the location of the fragment from
122 * the beginning of the filesystem.
123 */
124
125static u64 ufs_frag_map(struct inode *inode, unsigned offsets[4], int depth)
126{
127 struct ufs_inode_info *ufsi = UFS_I(inode);
128 struct super_block *sb = inode->i_sb;
129 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
130 u64 mask = (u64) uspi->s_apbmask>>uspi->s_fpbshift;
131 int shift = uspi->s_apbshift-uspi->s_fpbshift;
132 Indirect chain[4], *q = chain;
133 unsigned *p;
134 unsigned flags = UFS_SB(sb)->s_flags;
135 u64 res = 0;
136
137 UFSD(": uspi->s_fpbshift = %d ,uspi->s_apbmask = %x, mask=%llx\n",
138 uspi->s_fpbshift, uspi->s_apbmask,
139 (unsigned long long)mask);
140
141 if (depth == 0)
142 goto no_block;
143
144again:
145 p = offsets;
146
147 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
148 goto ufs2;
149
150 if (!grow_chain32(ufsi, NULL, &ufsi->i_u1.i_data[*p++], chain, q))
151 goto changed;
152 if (!q->key32)
153 goto no_block;
154 while (--depth) {
155 __fs32 *ptr;
156 struct buffer_head *bh;
157 unsigned n = *p++;
158
159 bh = sb_bread(sb, uspi->s_sbbase +
160 fs32_to_cpu(sb, q->key32) + (n>>shift));
161 if (!bh)
162 goto no_block;
163 ptr = (__fs32 *)bh->b_data + (n & mask);
164 if (!grow_chain32(ufsi, bh, ptr, chain, ++q))
165 goto changed;
166 if (!q->key32)
167 goto no_block;
168 }
169 res = fs32_to_cpu(sb, q->key32);
170 goto found;
171
172ufs2:
173 if (!grow_chain64(ufsi, NULL, &ufsi->i_u1.u2_i_data[*p++], chain, q))
174 goto changed;
175 if (!q->key64)
176 goto no_block;
177
178 while (--depth) {
179 __fs64 *ptr;
180 struct buffer_head *bh;
181 unsigned n = *p++;
182
183 bh = sb_bread(sb, uspi->s_sbbase +
184 fs64_to_cpu(sb, q->key64) + (n>>shift));
185 if (!bh)
186 goto no_block;
187 ptr = (__fs64 *)bh->b_data + (n & mask);
188 if (!grow_chain64(ufsi, bh, ptr, chain, ++q))
189 goto changed;
190 if (!q->key64)
191 goto no_block;
192 }
193 res = fs64_to_cpu(sb, q->key64);
194found:
195 res += uspi->s_sbbase;
196no_block:
197 while (q > chain) {
198 brelse(q->bh);
199 q--;
200 }
201 return res;
202
203changed:
204 while (q > chain) {
205 brelse(q->bh);
206 q--;
207 }
208 goto again;
209}
210
211/*
212 * Unpacking tails: we have a file with partial final block and
213 * we had been asked to extend it. If the fragment being written
214 * is within the same block, we need to extend the tail just to cover
215 * that fragment. Otherwise the tail is extended to full block.
216 *
217 * Note that we might need to create a _new_ tail, but that will
218 * be handled elsewhere; this is strictly for resizing old
219 * ones.
220 */
221static bool
222ufs_extend_tail(struct inode *inode, u64 writes_to,
223 int *err, struct folio *locked_folio)
224{
225 struct ufs_inode_info *ufsi = UFS_I(inode);
226 struct super_block *sb = inode->i_sb;
227 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
228 unsigned lastfrag = ufsi->i_lastfrag; /* it's a short file, so unsigned is enough */
229 unsigned block = ufs_fragstoblks(lastfrag);
230 unsigned new_size;
231 void *p;
232 u64 tmp;
233
234 if (writes_to < (lastfrag | uspi->s_fpbmask))
235 new_size = (writes_to & uspi->s_fpbmask) + 1;
236 else
237 new_size = uspi->s_fpb;
238
239 p = ufs_get_direct_data_ptr(uspi, ufsi, block);
240 tmp = ufs_new_fragments(inode, p, lastfrag, ufs_data_ptr_to_cpu(sb, p),
241 new_size - (lastfrag & uspi->s_fpbmask), err,
242 locked_folio);
243 return tmp != 0;
244}
245
246/**
247 * ufs_inode_getfrag() - allocate new fragment(s)
248 * @inode: pointer to inode
249 * @index: number of block pointer within the inode's array.
250 * @new_fragment: number of new allocated fragment(s)
251 * @err: we set it if something wrong
252 * @new: we set it if we allocate new block
253 * @locked_folio: for ufs_new_fragments()
254 */
255static u64 ufs_inode_getfrag(struct inode *inode, unsigned index,
256 sector_t new_fragment, int *err,
257 int *new, struct folio *locked_folio)
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 p = ufs_get_direct_data_ptr(uspi, ufsi, index);
267 tmp = ufs_data_ptr_to_cpu(sb, p);
268 if (tmp)
269 goto out;
270
271 lastfrag = ufsi->i_lastfrag;
272
273 /* will that be a new tail? */
274 if (new_fragment < UFS_NDIR_FRAGMENT && new_fragment >= lastfrag)
275 nfrags = (new_fragment & uspi->s_fpbmask) + 1;
276
277 goal = 0;
278 if (index) {
279 goal = ufs_data_ptr_to_cpu(sb,
280 ufs_get_direct_data_ptr(uspi, ufsi, index - 1));
281 if (goal)
282 goal += uspi->s_fpb;
283 }
284 tmp = ufs_new_fragments(inode, p, ufs_blknum(new_fragment),
285 goal, nfrags, err, locked_folio);
286
287 if (!tmp) {
288 *err = -ENOSPC;
289 return 0;
290 }
291
292 if (new)
293 *new = 1;
294 inode_set_ctime_current(inode);
295 if (IS_SYNC(inode))
296 ufs_sync_inode (inode);
297 mark_inode_dirty(inode);
298out:
299 return tmp + uspi->s_sbbase;
300}
301
302/**
303 * ufs_inode_getblock() - allocate new block
304 * @inode: pointer to inode
305 * @ind_block: block number of the indirect block
306 * @index: number of pointer within the indirect block
307 * @new_fragment: number of new allocated fragment
308 * (block will hold this fragment and also uspi->s_fpb-1)
309 * @err: see ufs_inode_getfrag()
310 * @new: see ufs_inode_getfrag()
311 * @locked_folio: see ufs_inode_getfrag()
312 */
313static u64 ufs_inode_getblock(struct inode *inode, u64 ind_block,
314 unsigned index, sector_t new_fragment, int *err,
315 int *new, struct folio *locked_folio)
316{
317 struct super_block *sb = inode->i_sb;
318 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
319 int shift = uspi->s_apbshift - uspi->s_fpbshift;
320 u64 tmp = 0, goal;
321 struct buffer_head *bh;
322 void *p;
323
324 if (!ind_block)
325 return 0;
326
327 bh = sb_bread(sb, ind_block + (index >> shift));
328 if (unlikely(!bh)) {
329 *err = -EIO;
330 return 0;
331 }
332
333 index &= uspi->s_apbmask >> uspi->s_fpbshift;
334 if (uspi->fs_magic == UFS2_MAGIC)
335 p = (__fs64 *)bh->b_data + index;
336 else
337 p = (__fs32 *)bh->b_data + index;
338
339 tmp = ufs_data_ptr_to_cpu(sb, p);
340 if (tmp)
341 goto out;
342
343 if (index && (uspi->fs_magic == UFS2_MAGIC ?
344 (tmp = fs64_to_cpu(sb, ((__fs64 *)bh->b_data)[index-1])) :
345 (tmp = fs32_to_cpu(sb, ((__fs32 *)bh->b_data)[index-1]))))
346 goal = tmp + uspi->s_fpb;
347 else
348 goal = bh->b_blocknr + uspi->s_fpb;
349 tmp = ufs_new_fragments(inode, p, ufs_blknum(new_fragment), goal,
350 uspi->s_fpb, err, locked_folio);
351 if (!tmp)
352 goto out;
353
354 if (new)
355 *new = 1;
356
357 mark_buffer_dirty(bh);
358 if (IS_SYNC(inode))
359 sync_dirty_buffer(bh);
360 inode_set_ctime_current(inode);
361 mark_inode_dirty(inode);
362out:
363 brelse (bh);
364 UFSD("EXIT\n");
365 if (tmp)
366 tmp += uspi->s_sbbase;
367 return tmp;
368}
369
370/**
371 * ufs_getfrag_block() - `get_block_t' function, interface between UFS and
372 * read_folio, writepages and so on
373 */
374
375static int ufs_getfrag_block(struct inode *inode, sector_t fragment, struct buffer_head *bh_result, int create)
376{
377 struct super_block *sb = inode->i_sb;
378 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
379 int err = 0, new = 0;
380 unsigned offsets[4];
381 int depth = ufs_block_to_path(inode, fragment >> uspi->s_fpbshift, offsets);
382 u64 phys64 = 0;
383 unsigned frag = fragment & uspi->s_fpbmask;
384
385 phys64 = ufs_frag_map(inode, offsets, depth);
386 if (!create)
387 goto done;
388
389 if (phys64) {
390 if (fragment >= UFS_NDIR_FRAGMENT)
391 goto done;
392 read_seqlock_excl(&UFS_I(inode)->meta_lock);
393 if (fragment < UFS_I(inode)->i_lastfrag) {
394 read_sequnlock_excl(&UFS_I(inode)->meta_lock);
395 goto done;
396 }
397 read_sequnlock_excl(&UFS_I(inode)->meta_lock);
398 }
399 /* This code entered only while writing ....? */
400
401 mutex_lock(&UFS_I(inode)->truncate_mutex);
402
403 UFSD("ENTER, ino %lu, fragment %llu\n", inode->i_ino, (unsigned long long)fragment);
404 if (unlikely(!depth)) {
405 ufs_warning(sb, "ufs_get_block", "block > big");
406 err = -EIO;
407 goto out;
408 }
409
410 if (UFS_I(inode)->i_lastfrag < UFS_NDIR_FRAGMENT) {
411 unsigned lastfrag = UFS_I(inode)->i_lastfrag;
412 unsigned tailfrags = lastfrag & uspi->s_fpbmask;
413 if (tailfrags && fragment >= lastfrag) {
414 if (!ufs_extend_tail(inode, fragment,
415 &err, bh_result->b_folio))
416 goto out;
417 }
418 }
419
420 if (depth == 1) {
421 phys64 = ufs_inode_getfrag(inode, offsets[0], fragment,
422 &err, &new, bh_result->b_folio);
423 } else {
424 int i;
425 phys64 = ufs_inode_getfrag(inode, offsets[0], fragment,
426 &err, NULL, NULL);
427 for (i = 1; i < depth - 1; i++)
428 phys64 = ufs_inode_getblock(inode, phys64, offsets[i],
429 fragment, &err, NULL, NULL);
430 phys64 = ufs_inode_getblock(inode, phys64, offsets[depth - 1],
431 fragment, &err, &new, bh_result->b_folio);
432 }
433out:
434 if (phys64) {
435 phys64 += frag;
436 map_bh(bh_result, sb, phys64);
437 if (new)
438 set_buffer_new(bh_result);
439 }
440 mutex_unlock(&UFS_I(inode)->truncate_mutex);
441 return err;
442
443done:
444 if (phys64)
445 map_bh(bh_result, sb, phys64 + frag);
446 return 0;
447}
448
449static int ufs_writepages(struct address_space *mapping,
450 struct writeback_control *wbc)
451{
452 return mpage_writepages(mapping, wbc, ufs_getfrag_block);
453}
454
455static int ufs_read_folio(struct file *file, struct folio *folio)
456{
457 return block_read_full_folio(folio, ufs_getfrag_block);
458}
459
460int ufs_prepare_chunk(struct folio *folio, loff_t pos, unsigned len)
461{
462 return __block_write_begin(folio, pos, len, ufs_getfrag_block);
463}
464
465static void ufs_truncate_blocks(struct inode *);
466
467static void ufs_write_failed(struct address_space *mapping, loff_t to)
468{
469 struct inode *inode = mapping->host;
470
471 if (to > inode->i_size) {
472 truncate_pagecache(inode, inode->i_size);
473 ufs_truncate_blocks(inode);
474 }
475}
476
477static int ufs_write_begin(struct file *file, struct address_space *mapping,
478 loff_t pos, unsigned len,
479 struct folio **foliop, void **fsdata)
480{
481 int ret;
482
483 ret = block_write_begin(mapping, pos, len, foliop, ufs_getfrag_block);
484 if (unlikely(ret))
485 ufs_write_failed(mapping, pos + len);
486
487 return ret;
488}
489
490static int ufs_write_end(struct file *file, struct address_space *mapping,
491 loff_t pos, unsigned len, unsigned copied,
492 struct folio *folio, void *fsdata)
493{
494 int ret;
495
496 ret = generic_write_end(file, mapping, pos, len, copied, folio, fsdata);
497 if (ret < len)
498 ufs_write_failed(mapping, pos + len);
499 return ret;
500}
501
502static sector_t ufs_bmap(struct address_space *mapping, sector_t block)
503{
504 return generic_block_bmap(mapping,block,ufs_getfrag_block);
505}
506
507const struct address_space_operations ufs_aops = {
508 .dirty_folio = block_dirty_folio,
509 .invalidate_folio = block_invalidate_folio,
510 .read_folio = ufs_read_folio,
511 .writepages = ufs_writepages,
512 .write_begin = ufs_write_begin,
513 .write_end = ufs_write_end,
514 .migrate_folio = buffer_migrate_folio,
515 .bmap = ufs_bmap
516};
517
518static void ufs_set_inode_ops(struct inode *inode)
519{
520 if (S_ISREG(inode->i_mode)) {
521 inode->i_op = &ufs_file_inode_operations;
522 inode->i_fop = &ufs_file_operations;
523 inode->i_mapping->a_ops = &ufs_aops;
524 } else if (S_ISDIR(inode->i_mode)) {
525 inode->i_op = &ufs_dir_inode_operations;
526 inode->i_fop = &ufs_dir_operations;
527 inode->i_mapping->a_ops = &ufs_aops;
528 } else if (S_ISLNK(inode->i_mode)) {
529 if (!inode->i_blocks) {
530 inode->i_link = (char *)UFS_I(inode)->i_u1.i_symlink;
531 inode->i_op = &simple_symlink_inode_operations;
532 } else {
533 inode->i_mapping->a_ops = &ufs_aops;
534 inode->i_op = &page_symlink_inode_operations;
535 inode_nohighmem(inode);
536 }
537 } else
538 init_special_inode(inode, inode->i_mode,
539 ufs_get_inode_dev(inode->i_sb, UFS_I(inode)));
540}
541
542static int ufs1_read_inode(struct inode *inode, struct ufs_inode *ufs_inode)
543{
544 struct ufs_inode_info *ufsi = UFS_I(inode);
545 struct super_block *sb = inode->i_sb;
546 umode_t mode;
547
548 /*
549 * Copy data to the in-core inode.
550 */
551 inode->i_mode = mode = fs16_to_cpu(sb, ufs_inode->ui_mode);
552 set_nlink(inode, fs16_to_cpu(sb, ufs_inode->ui_nlink));
553 if (inode->i_nlink == 0)
554 return -ESTALE;
555
556 /*
557 * Linux now has 32-bit uid and gid, so we can support EFT.
558 */
559 i_uid_write(inode, ufs_get_inode_uid(sb, ufs_inode));
560 i_gid_write(inode, ufs_get_inode_gid(sb, ufs_inode));
561
562 inode->i_size = fs64_to_cpu(sb, ufs_inode->ui_size);
563 inode_set_atime(inode,
564 (signed)fs32_to_cpu(sb, ufs_inode->ui_atime.tv_sec),
565 0);
566 inode_set_ctime(inode,
567 (signed)fs32_to_cpu(sb, ufs_inode->ui_ctime.tv_sec),
568 0);
569 inode_set_mtime(inode,
570 (signed)fs32_to_cpu(sb, ufs_inode->ui_mtime.tv_sec),
571 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
590static 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 return -ESTALE;
604
605 /*
606 * Linux now has 32-bit uid and gid, so we can support EFT.
607 */
608 i_uid_write(inode, fs32_to_cpu(sb, ufs2_inode->ui_uid));
609 i_gid_write(inode, fs32_to_cpu(sb, ufs2_inode->ui_gid));
610
611 inode->i_size = fs64_to_cpu(sb, ufs2_inode->ui_size);
612 inode_set_atime(inode, fs64_to_cpu(sb, ufs2_inode->ui_atime),
613 fs32_to_cpu(sb, ufs2_inode->ui_atimensec));
614 inode_set_ctime(inode, fs64_to_cpu(sb, ufs2_inode->ui_ctime),
615 fs32_to_cpu(sb, ufs2_inode->ui_ctimensec));
616 inode_set_mtime(inode, fs64_to_cpu(sb, ufs2_inode->ui_mtime),
617 fs32_to_cpu(sb, ufs2_inode->ui_mtimensec));
618 inode->i_blocks = fs64_to_cpu(sb, ufs2_inode->ui_blocks);
619 inode->i_generation = fs32_to_cpu(sb, ufs2_inode->ui_gen);
620 ufsi->i_flags = fs32_to_cpu(sb, ufs2_inode->ui_flags);
621 /*
622 ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow);
623 ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag);
624 */
625
626 if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) {
627 memcpy(ufsi->i_u1.u2_i_data, &ufs2_inode->ui_u2.ui_addr,
628 sizeof(ufs2_inode->ui_u2.ui_addr));
629 } else {
630 memcpy(ufsi->i_u1.i_symlink, ufs2_inode->ui_u2.ui_symlink,
631 sizeof(ufs2_inode->ui_u2.ui_symlink) - 1);
632 ufsi->i_u1.i_symlink[sizeof(ufs2_inode->ui_u2.ui_symlink) - 1] = 0;
633 }
634 return 0;
635}
636
637struct inode *ufs_iget(struct super_block *sb, unsigned long ino)
638{
639 struct ufs_inode_info *ufsi;
640 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
641 struct buffer_head * bh;
642 struct inode *inode;
643 int err = -EIO;
644
645 UFSD("ENTER, ino %lu\n", ino);
646
647 if (ino < UFS_ROOTINO || ino > (uspi->s_ncg * uspi->s_ipg)) {
648 ufs_warning(sb, "ufs_read_inode", "bad inode number (%lu)\n",
649 ino);
650 return ERR_PTR(-EIO);
651 }
652
653 inode = iget_locked(sb, ino);
654 if (!inode)
655 return ERR_PTR(-ENOMEM);
656 if (!(inode->i_state & I_NEW))
657 return inode;
658
659 ufsi = UFS_I(inode);
660
661 bh = sb_bread(sb, uspi->s_sbbase + ufs_inotofsba(inode->i_ino));
662 if (!bh) {
663 ufs_warning(sb, "ufs_read_inode", "unable to read inode %lu\n",
664 inode->i_ino);
665 goto bad_inode;
666 }
667 if ((UFS_SB(sb)->s_flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
668 struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data;
669
670 err = ufs2_read_inode(inode,
671 ufs2_inode + ufs_inotofsbo(inode->i_ino));
672 } else {
673 struct ufs_inode *ufs_inode = (struct ufs_inode *)bh->b_data;
674
675 err = ufs1_read_inode(inode,
676 ufs_inode + ufs_inotofsbo(inode->i_ino));
677 }
678 brelse(bh);
679 if (err)
680 goto bad_inode;
681
682 inode_inc_iversion(inode);
683 ufsi->i_lastfrag =
684 (inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift;
685 ufsi->i_dir_start_lookup = 0;
686 ufsi->i_osync = 0;
687
688 ufs_set_inode_ops(inode);
689
690 UFSD("EXIT\n");
691 unlock_new_inode(inode);
692 return inode;
693
694bad_inode:
695 iget_failed(inode);
696 return ERR_PTR(err);
697}
698
699static void ufs1_update_inode(struct inode *inode, struct ufs_inode *ufs_inode)
700{
701 struct super_block *sb = inode->i_sb;
702 struct ufs_inode_info *ufsi = UFS_I(inode);
703
704 ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode);
705 ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink);
706
707 ufs_set_inode_uid(sb, ufs_inode, i_uid_read(inode));
708 ufs_set_inode_gid(sb, ufs_inode, i_gid_read(inode));
709
710 ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size);
711 ufs_inode->ui_atime.tv_sec = cpu_to_fs32(sb,
712 inode_get_atime_sec(inode));
713 ufs_inode->ui_atime.tv_usec = 0;
714 ufs_inode->ui_ctime.tv_sec = cpu_to_fs32(sb,
715 inode_get_ctime_sec(inode));
716 ufs_inode->ui_ctime.tv_usec = 0;
717 ufs_inode->ui_mtime.tv_sec = cpu_to_fs32(sb,
718 inode_get_mtime_sec(inode));
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
745static 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_get_atime_sec(inode));
759 ufs_inode->ui_atimensec = cpu_to_fs32(sb,
760 inode_get_atime_nsec(inode));
761 ufs_inode->ui_ctime = cpu_to_fs64(sb, inode_get_ctime_sec(inode));
762 ufs_inode->ui_ctimensec = cpu_to_fs32(sb,
763 inode_get_ctime_nsec(inode));
764 ufs_inode->ui_mtime = cpu_to_fs64(sb, inode_get_mtime_sec(inode));
765 ufs_inode->ui_mtimensec = cpu_to_fs32(sb,
766 inode_get_mtime_nsec(inode));
767
768 ufs_inode->ui_blocks = cpu_to_fs64(sb, inode->i_blocks);
769 ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags);
770 ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation);
771
772 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
773 /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */
774 ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.u2_i_data[0];
775 } else if (inode->i_blocks) {
776 memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.u2_i_data,
777 sizeof(ufs_inode->ui_u2.ui_addr));
778 } else {
779 memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink,
780 sizeof(ufs_inode->ui_u2.ui_symlink));
781 }
782
783 if (!inode->i_nlink)
784 memset (ufs_inode, 0, sizeof(struct ufs2_inode));
785 UFSD("EXIT\n");
786}
787
788static int ufs_update_inode(struct inode * inode, int do_sync)
789{
790 struct super_block *sb = inode->i_sb;
791 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
792 struct buffer_head * bh;
793
794 UFSD("ENTER, ino %lu\n", inode->i_ino);
795
796 if (inode->i_ino < UFS_ROOTINO ||
797 inode->i_ino > (uspi->s_ncg * uspi->s_ipg)) {
798 ufs_warning (sb, "ufs_read_inode", "bad inode number (%lu)\n", inode->i_ino);
799 return -1;
800 }
801
802 bh = sb_bread(sb, ufs_inotofsba(inode->i_ino));
803 if (!bh) {
804 ufs_warning (sb, "ufs_read_inode", "unable to read inode %lu\n", inode->i_ino);
805 return -1;
806 }
807 if (uspi->fs_magic == UFS2_MAGIC) {
808 struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data;
809
810 ufs2_update_inode(inode,
811 ufs2_inode + ufs_inotofsbo(inode->i_ino));
812 } else {
813 struct ufs_inode *ufs_inode = (struct ufs_inode *) bh->b_data;
814
815 ufs1_update_inode(inode, ufs_inode + ufs_inotofsbo(inode->i_ino));
816 }
817
818 mark_buffer_dirty(bh);
819 if (do_sync)
820 sync_dirty_buffer(bh);
821 brelse (bh);
822
823 UFSD("EXIT\n");
824 return 0;
825}
826
827int ufs_write_inode(struct inode *inode, struct writeback_control *wbc)
828{
829 return ufs_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL);
830}
831
832int ufs_sync_inode (struct inode *inode)
833{
834 return ufs_update_inode (inode, 1);
835}
836
837void ufs_evict_inode(struct inode * inode)
838{
839 int want_delete = 0;
840
841 if (!inode->i_nlink && !is_bad_inode(inode))
842 want_delete = 1;
843
844 truncate_inode_pages_final(&inode->i_data);
845 if (want_delete) {
846 inode->i_size = 0;
847 if (inode->i_blocks &&
848 (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
849 S_ISLNK(inode->i_mode)))
850 ufs_truncate_blocks(inode);
851 ufs_update_inode(inode, inode_needs_sync(inode));
852 }
853
854 invalidate_inode_buffers(inode);
855 clear_inode(inode);
856
857 if (want_delete)
858 ufs_free_inode(inode);
859}
860
861struct to_free {
862 struct inode *inode;
863 u64 to;
864 unsigned count;
865};
866
867static inline void free_data(struct to_free *ctx, u64 from, unsigned count)
868{
869 if (ctx->count && ctx->to != from) {
870 ufs_free_blocks(ctx->inode, ctx->to - ctx->count, ctx->count);
871 ctx->count = 0;
872 }
873 ctx->count += count;
874 ctx->to = from + count;
875}
876
877#define DIRECT_FRAGMENT ((inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift)
878
879/*
880 * used only for truncation down to direct blocks.
881 */
882static void ufs_trunc_direct(struct inode *inode)
883{
884 struct ufs_inode_info *ufsi = UFS_I(inode);
885 struct super_block *sb = inode->i_sb;
886 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
887 unsigned int new_frags, old_frags;
888 unsigned int old_slot, new_slot;
889 unsigned int old_tail, new_tail;
890 struct to_free ctx = {.inode = inode};
891
892 UFSD("ENTER: ino %lu\n", inode->i_ino);
893
894 new_frags = DIRECT_FRAGMENT;
895 // new_frags = first fragment past the new EOF
896 old_frags = min_t(u64, UFS_NDIR_FRAGMENT, ufsi->i_lastfrag);
897 // old_frags = first fragment past the old EOF or covered by indirects
898
899 if (new_frags >= old_frags) // expanding - nothing to free
900 goto done;
901
902 old_tail = ufs_fragnum(old_frags);
903 old_slot = ufs_fragstoblks(old_frags);
904 new_tail = ufs_fragnum(new_frags);
905 new_slot = ufs_fragstoblks(new_frags);
906
907 if (old_slot == new_slot) { // old_tail > 0
908 void *p = ufs_get_direct_data_ptr(uspi, ufsi, old_slot);
909 u64 tmp = ufs_data_ptr_to_cpu(sb, p);
910 if (!tmp)
911 ufs_panic(sb, __func__, "internal error");
912 if (!new_tail) {
913 write_seqlock(&ufsi->meta_lock);
914 ufs_data_ptr_clear(uspi, p);
915 write_sequnlock(&ufsi->meta_lock);
916 }
917 ufs_free_fragments(inode, tmp + new_tail, old_tail - new_tail);
918 } else {
919 unsigned int slot = new_slot;
920
921 if (new_tail) {
922 void *p = ufs_get_direct_data_ptr(uspi, ufsi, slot++);
923 u64 tmp = ufs_data_ptr_to_cpu(sb, p);
924 if (!tmp)
925 ufs_panic(sb, __func__, "internal error");
926
927 ufs_free_fragments(inode, tmp + new_tail,
928 uspi->s_fpb - new_tail);
929 }
930 while (slot < old_slot) {
931 void *p = ufs_get_direct_data_ptr(uspi, ufsi, slot++);
932 u64 tmp = ufs_data_ptr_to_cpu(sb, p);
933 if (!tmp)
934 continue;
935 write_seqlock(&ufsi->meta_lock);
936 ufs_data_ptr_clear(uspi, p);
937 write_sequnlock(&ufsi->meta_lock);
938
939 free_data(&ctx, tmp, uspi->s_fpb);
940 }
941
942 free_data(&ctx, 0, 0);
943
944 if (old_tail) {
945 void *p = ufs_get_direct_data_ptr(uspi, ufsi, slot);
946 u64 tmp = ufs_data_ptr_to_cpu(sb, p);
947 if (!tmp)
948 ufs_panic(sb, __func__, "internal error");
949 write_seqlock(&ufsi->meta_lock);
950 ufs_data_ptr_clear(uspi, p);
951 write_sequnlock(&ufsi->meta_lock);
952
953 ufs_free_fragments(inode, tmp, old_tail);
954 }
955 }
956done:
957 UFSD("EXIT: ino %lu\n", inode->i_ino);
958}
959
960static void free_full_branch(struct inode *inode, u64 ind_block, int depth)
961{
962 struct super_block *sb = inode->i_sb;
963 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
964 struct ufs_buffer_head *ubh = ubh_bread(sb, ind_block, uspi->s_bsize);
965 unsigned i;
966
967 if (!ubh)
968 return;
969
970 if (--depth) {
971 for (i = 0; i < uspi->s_apb; i++) {
972 void *p = ubh_get_data_ptr(uspi, ubh, i);
973 u64 block = ufs_data_ptr_to_cpu(sb, p);
974 if (block)
975 free_full_branch(inode, block, depth);
976 }
977 } else {
978 struct to_free ctx = {.inode = inode};
979
980 for (i = 0; i < uspi->s_apb; i++) {
981 void *p = ubh_get_data_ptr(uspi, ubh, i);
982 u64 block = ufs_data_ptr_to_cpu(sb, p);
983 if (block)
984 free_data(&ctx, block, uspi->s_fpb);
985 }
986 free_data(&ctx, 0, 0);
987 }
988
989 ubh_bforget(ubh);
990 ufs_free_blocks(inode, ind_block, uspi->s_fpb);
991}
992
993static void free_branch_tail(struct inode *inode, unsigned from, struct ufs_buffer_head *ubh, int depth)
994{
995 struct super_block *sb = inode->i_sb;
996 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
997 unsigned i;
998
999 if (--depth) {
1000 for (i = from; i < uspi->s_apb ; i++) {
1001 void *p = ubh_get_data_ptr(uspi, ubh, i);
1002 u64 block = ufs_data_ptr_to_cpu(sb, p);
1003 if (block) {
1004 write_seqlock(&UFS_I(inode)->meta_lock);
1005 ufs_data_ptr_clear(uspi, p);
1006 write_sequnlock(&UFS_I(inode)->meta_lock);
1007 ubh_mark_buffer_dirty(ubh);
1008 free_full_branch(inode, block, depth);
1009 }
1010 }
1011 } else {
1012 struct to_free ctx = {.inode = inode};
1013
1014 for (i = from; i < uspi->s_apb; i++) {
1015 void *p = ubh_get_data_ptr(uspi, ubh, i);
1016 u64 block = ufs_data_ptr_to_cpu(sb, p);
1017 if (block) {
1018 write_seqlock(&UFS_I(inode)->meta_lock);
1019 ufs_data_ptr_clear(uspi, p);
1020 write_sequnlock(&UFS_I(inode)->meta_lock);
1021 ubh_mark_buffer_dirty(ubh);
1022 free_data(&ctx, block, uspi->s_fpb);
1023 }
1024 }
1025 free_data(&ctx, 0, 0);
1026 }
1027 if (IS_SYNC(inode) && ubh_buffer_dirty(ubh))
1028 ubh_sync_block(ubh);
1029 ubh_brelse(ubh);
1030}
1031
1032static int ufs_alloc_lastblock(struct inode *inode, loff_t size)
1033{
1034 int err = 0;
1035 struct super_block *sb = inode->i_sb;
1036 struct address_space *mapping = inode->i_mapping;
1037 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
1038 unsigned i, end;
1039 sector_t lastfrag;
1040 struct folio *folio;
1041 struct buffer_head *bh;
1042 u64 phys64;
1043
1044 lastfrag = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
1045
1046 if (!lastfrag)
1047 goto out;
1048
1049 lastfrag--;
1050
1051 folio = ufs_get_locked_folio(mapping, lastfrag >>
1052 (PAGE_SHIFT - inode->i_blkbits));
1053 if (IS_ERR(folio)) {
1054 err = -EIO;
1055 goto out;
1056 }
1057
1058 end = lastfrag & ((1 << (PAGE_SHIFT - inode->i_blkbits)) - 1);
1059 bh = folio_buffers(folio);
1060 for (i = 0; i < end; ++i)
1061 bh = bh->b_this_page;
1062
1063 err = ufs_getfrag_block(inode, lastfrag, bh, 1);
1064
1065 if (unlikely(err))
1066 goto out_unlock;
1067
1068 if (buffer_new(bh)) {
1069 clear_buffer_new(bh);
1070 clean_bdev_bh_alias(bh);
1071 /*
1072 * we do not zeroize fragment, because of
1073 * if it maped to hole, it already contains zeroes
1074 */
1075 set_buffer_uptodate(bh);
1076 mark_buffer_dirty(bh);
1077 folio_mark_dirty(folio);
1078 }
1079
1080 if (lastfrag >= UFS_IND_FRAGMENT) {
1081 end = uspi->s_fpb - ufs_fragnum(lastfrag) - 1;
1082 phys64 = bh->b_blocknr + 1;
1083 for (i = 0; i < end; ++i) {
1084 bh = sb_getblk(sb, i + phys64);
1085 lock_buffer(bh);
1086 memset(bh->b_data, 0, sb->s_blocksize);
1087 set_buffer_uptodate(bh);
1088 mark_buffer_dirty(bh);
1089 unlock_buffer(bh);
1090 sync_dirty_buffer(bh);
1091 brelse(bh);
1092 }
1093 }
1094out_unlock:
1095 ufs_put_locked_folio(folio);
1096out:
1097 return err;
1098}
1099
1100static void ufs_truncate_blocks(struct inode *inode)
1101{
1102 struct ufs_inode_info *ufsi = UFS_I(inode);
1103 struct super_block *sb = inode->i_sb;
1104 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
1105 unsigned offsets[4];
1106 int depth;
1107 int depth2;
1108 unsigned i;
1109 struct ufs_buffer_head *ubh[3];
1110 void *p;
1111 u64 block;
1112
1113 if (inode->i_size) {
1114 sector_t last = (inode->i_size - 1) >> uspi->s_bshift;
1115 depth = ufs_block_to_path(inode, last, offsets);
1116 if (!depth)
1117 return;
1118 } else {
1119 depth = 1;
1120 }
1121
1122 for (depth2 = depth - 1; depth2; depth2--)
1123 if (offsets[depth2] != uspi->s_apb - 1)
1124 break;
1125
1126 mutex_lock(&ufsi->truncate_mutex);
1127 if (depth == 1) {
1128 ufs_trunc_direct(inode);
1129 offsets[0] = UFS_IND_BLOCK;
1130 } else {
1131 /* get the blocks that should be partially emptied */
1132 p = ufs_get_direct_data_ptr(uspi, ufsi, offsets[0]++);
1133 for (i = 0; i < depth2; i++) {
1134 block = ufs_data_ptr_to_cpu(sb, p);
1135 if (!block)
1136 break;
1137 ubh[i] = ubh_bread(sb, block, uspi->s_bsize);
1138 if (!ubh[i]) {
1139 write_seqlock(&ufsi->meta_lock);
1140 ufs_data_ptr_clear(uspi, p);
1141 write_sequnlock(&ufsi->meta_lock);
1142 break;
1143 }
1144 p = ubh_get_data_ptr(uspi, ubh[i], offsets[i + 1]++);
1145 }
1146 while (i--)
1147 free_branch_tail(inode, offsets[i + 1], ubh[i], depth - i - 1);
1148 }
1149 for (i = offsets[0]; i <= UFS_TIND_BLOCK; i++) {
1150 p = ufs_get_direct_data_ptr(uspi, ufsi, i);
1151 block = ufs_data_ptr_to_cpu(sb, p);
1152 if (block) {
1153 write_seqlock(&ufsi->meta_lock);
1154 ufs_data_ptr_clear(uspi, p);
1155 write_sequnlock(&ufsi->meta_lock);
1156 free_full_branch(inode, block, i - UFS_IND_BLOCK + 1);
1157 }
1158 }
1159 read_seqlock_excl(&ufsi->meta_lock);
1160 ufsi->i_lastfrag = DIRECT_FRAGMENT;
1161 read_sequnlock_excl(&ufsi->meta_lock);
1162 mark_inode_dirty(inode);
1163 mutex_unlock(&ufsi->truncate_mutex);
1164}
1165
1166static int ufs_truncate(struct inode *inode, loff_t size)
1167{
1168 int err = 0;
1169
1170 UFSD("ENTER: ino %lu, i_size: %llu, old_i_size: %llu\n",
1171 inode->i_ino, (unsigned long long)size,
1172 (unsigned long long)i_size_read(inode));
1173
1174 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
1175 S_ISLNK(inode->i_mode)))
1176 return -EINVAL;
1177 if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
1178 return -EPERM;
1179
1180 err = ufs_alloc_lastblock(inode, size);
1181
1182 if (err)
1183 goto out;
1184
1185 block_truncate_page(inode->i_mapping, size, ufs_getfrag_block);
1186
1187 truncate_setsize(inode, size);
1188
1189 ufs_truncate_blocks(inode);
1190 inode_set_mtime_to_ts(inode, inode_set_ctime_current(inode));
1191 mark_inode_dirty(inode);
1192out:
1193 UFSD("EXIT: err %d\n", err);
1194 return err;
1195}
1196
1197int ufs_setattr(struct mnt_idmap *idmap, struct dentry *dentry,
1198 struct iattr *attr)
1199{
1200 struct inode *inode = d_inode(dentry);
1201 unsigned int ia_valid = attr->ia_valid;
1202 int error;
1203
1204 error = setattr_prepare(&nop_mnt_idmap, dentry, attr);
1205 if (error)
1206 return error;
1207
1208 if (ia_valid & ATTR_SIZE && attr->ia_size != inode->i_size) {
1209 error = ufs_truncate(inode, attr->ia_size);
1210 if (error)
1211 return error;
1212 }
1213
1214 setattr_copy(&nop_mnt_idmap, inode, attr);
1215 mark_inode_dirty(inode);
1216 return 0;
1217}
1218
1219const struct inode_operations ufs_file_inode_operations = {
1220 .setattr = ufs_setattr,
1221};