1 // SPDX-License-Identifier: GPL-2.0 1
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
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
25 * Big-endian to little-endian byte-swapping/
26 * David S. Miller (davem@caip.rutgers.
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
47 static int ufs_block_to_path(struct inode *ino
48 {
49 struct ufs_sb_private_info *uspi = UFS
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_bi
55 int n = 0;
56
57
58 UFSD("ptrs=uspi->s_apb = %d,double_blo
59 if (i_block < direct_blocks) {
60 offsets[n++] = i_block;
61 } else if ((i_block -= direct_blocks)
62 offsets[n++] = UFS_IND_BLOCK;
63 offsets[n++] = i_block;
64 } else if ((i_block -= indirect_blocks
65 offsets[n++] = UFS_DIND_BLOCK;
66 offsets[n++] = i_block >> ptrs
67 offsets[n++] = i_block & (ptrs
68 } else if (((i_block -= double_blocks)
69 offsets[n++] = UFS_TIND_BLOCK;
70 offsets[n++] = i_block >> (ptr
71 offsets[n++] = (i_block >> ptr
72 offsets[n++] = i_block & (ptrs
73 } else {
74 ufs_warning(inode->i_sb, "ufs_
75 }
76 return n;
77 }
78
79 typedef struct {
80 void *p;
81 union {
82 __fs32 key32;
83 __fs64 key64;
84 };
85 struct buffer_head *bh;
86 } Indirect;
87
88 static inline int grow_chain32(struct ufs_inod
89 struct buffer_h
90 Indirect *from,
91 {
92 Indirect *p;
93 unsigned seq;
94 to->bh = bh;
95 do {
96 seq = read_seqbegin(&ufsi->met
97 to->key32 = *(__fs32 *)(to->p
98 for (p = from; p <= to && p->k
99 ;
100 } while (read_seqretry(&ufsi->meta_loc
101 return (p > to);
102 }
103
104 static inline int grow_chain64(struct ufs_inod
105 struct buffer_h
106 Indirect *from,
107 {
108 Indirect *p;
109 unsigned seq;
110 to->bh = bh;
111 do {
112 seq = read_seqbegin(&ufsi->met
113 to->key64 = *(__fs64 *)(to->p
114 for (p = from; p <= to && p->k
115 ;
116 } while (read_seqretry(&ufsi->meta_loc
117 return (p > to);
118 }
119
120 /*
121 * Returns the location of the fragment from
122 * the beginning of the filesystem.
123 */
124
125 static u64 ufs_frag_map(struct inode *inode, u
126 {
127 struct ufs_inode_info *ufsi = UFS_I(in
128 struct super_block *sb = inode->i_sb;
129 struct ufs_sb_private_info *uspi = UFS
130 u64 mask = (u64) uspi->s_apbmask>>uspi
131 int shift = uspi->s_apbshift-uspi->s_f
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
138 uspi->s_fpbshift, uspi->s_apbm
139 (unsigned long long)mask);
140
141 if (depth == 0)
142 goto no_block;
143
144 again:
145 p = offsets;
146
147 if ((flags & UFS_TYPE_MASK) == UFS_TYP
148 goto ufs2;
149
150 if (!grow_chain32(ufsi, NULL, &ufsi->i
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_sbba
160 fs32_to_cpu(
161 if (!bh)
162 goto no_block;
163 ptr = (__fs32 *)bh->b_data + (
164 if (!grow_chain32(ufsi, bh, pt
165 goto changed;
166 if (!q->key32)
167 goto no_block;
168 }
169 res = fs32_to_cpu(sb, q->key32);
170 goto found;
171
172 ufs2:
173 if (!grow_chain64(ufsi, NULL, &ufsi->i
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_sbba
184 fs64_to_cpu(
185 if (!bh)
186 goto no_block;
187 ptr = (__fs64 *)bh->b_data + (
188 if (!grow_chain64(ufsi, bh, pt
189 goto changed;
190 if (!q->key64)
191 goto no_block;
192 }
193 res = fs64_to_cpu(sb, q->key64);
194 found:
195 res += uspi->s_sbbase;
196 no_block:
197 while (q > chain) {
198 brelse(q->bh);
199 q--;
200 }
201 return res;
202
203 changed:
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 partia
213 * we had been asked to extend it. If the fra
214 * is within the same block, we need to extend
215 * that fragment. Otherwise the tail is exten
216 *
217 * Note that we might need to create a _new_ t
218 * be handled elsewhere; this is strictly for
219 * ones.
220 */
221 static bool
222 ufs_extend_tail(struct inode *inode, u64 write
223 int *err, struct page *locke
224 {
225 struct ufs_inode_info *ufsi = UFS_I(in
226 struct super_block *sb = inode->i_sb;
227 struct ufs_sb_private_info *uspi = UFS
228 unsigned lastfrag = ufsi->i_lastfrag;
229 unsigned block = ufs_fragstoblks(lastf
230 unsigned new_size;
231 void *p;
232 u64 tmp;
233
234 if (writes_to < (lastfrag | uspi->s_fp
235 new_size = (writes_to & uspi->
236 else
237 new_size = uspi->s_fpb;
238
239 p = ufs_get_direct_data_ptr(uspi, ufsi
240 tmp = ufs_new_fragments(inode, p, last
241 new_size - (la
242 locked_page);
243 return tmp != 0;
244 }
245
246 /**
247 * ufs_inode_getfrag() - allocate new fragment
248 * @inode: pointer to inode
249 * @index: number of block pointer within the
250 * @new_fragment: number of new allocated frag
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 */
255 static u64
256 ufs_inode_getfrag(struct inode *inode, unsigne
257 sector_t new_fragment, int *
258 int *new, struct page *locke
259 {
260 struct ufs_inode_info *ufsi = UFS_I(in
261 struct super_block *sb = inode->i_sb;
262 struct ufs_sb_private_info *uspi = UFS
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_TY
269 goto ufs2;
270 */
271
272 p = ufs_get_direct_data_ptr(uspi, ufsi
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 &
281 nfrags = (new_fragment & uspi-
282
283 goal = 0;
284 if (index) {
285 goal = ufs_data_ptr_to_cpu(sb,
286 ufs_get_direc
287 if (goal)
288 goal += uspi->s_fpb;
289 }
290 tmp = ufs_new_fragments(inode, p, ufs_
291 goal, nfrags,
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);
304 out:
305 return tmp + uspi->s_sbbase;
306
307 /* This part : To be implemented ....
308 Required only for writing, not require
309 ufs2:
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
316 repeat2:
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 bl
327 * @index: number of pointer within the indire
328 * @new_fragment: number of new allocated frag
329 * (block will hold this fragment and also us
330 * @err: see ufs_inode_getfrag()
331 * @new: see ufs_inode_getfrag()
332 * @locked_page: see ufs_inode_getfrag()
333 */
334 static u64
335 ufs_inode_getblock(struct inode *inode, u64 in
336 unsigned index, sector_t new
337 int *new, struct page *locke
338 {
339 struct super_block *sb = inode->i_sb;
340 struct ufs_sb_private_info *uspi = UFS
341 int shift = uspi->s_apbshift - uspi->s
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 >
350 if (unlikely(!bh)) {
351 *err = -EIO;
352 return 0;
353 }
354
355 index &= uspi->s_apbmask >> uspi->s_fp
356 if (uspi->fs_magic == UFS2_MAGIC)
357 p = (__fs64 *)bh->b_data + ind
358 else
359 p = (__fs32 *)bh->b_data + ind
360
361 tmp = ufs_data_ptr_to_cpu(sb, p);
362 if (tmp)
363 goto out;
364
365 if (index && (uspi->fs_magic == UFS2_M
366 (tmp = fs64_to_cpu(sb, (
367 (tmp = fs32_to_cpu(sb, (
368 goal = tmp + uspi->s_fpb;
369 else
370 goal = bh->b_blocknr + uspi->s
371 tmp = ufs_new_fragments(inode, p, ufs_
372 uspi->s_fpb, e
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);
384 out:
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' functio
394 * read_folio, writepages and so on
395 */
396
397 static int ufs_getfrag_block(struct inode *ino
398 {
399 struct super_block *sb = inode->i_sb;
400 struct ufs_sb_private_info *uspi = UFS
401 int err = 0, new = 0;
402 unsigned offsets[4];
403 int depth = ufs_block_to_path(inode, f
404 u64 phys64 = 0;
405 unsigned frag = fragment & uspi->s_fpb
406
407 phys64 = ufs_frag_map(inode, offsets,
408 if (!create)
409 goto done;
410
411 if (phys64) {
412 if (fragment >= UFS_NDIR_FRAGM
413 goto done;
414 read_seqlock_excl(&UFS_I(inode
415 if (fragment < UFS_I(inode)->i
416 read_sequnlock_excl(&U
417 goto done;
418 }
419 read_sequnlock_excl(&UFS_I(ino
420 }
421 /* This code entered only while writin
422
423 mutex_lock(&UFS_I(inode)->truncate_mut
424
425 UFSD("ENTER, ino %lu, fragment %llu\n"
426 if (unlikely(!depth)) {
427 ufs_warning(sb, "ufs_get_block
428 err = -EIO;
429 goto out;
430 }
431
432 if (UFS_I(inode)->i_lastfrag < UFS_NDI
433 unsigned lastfrag = UFS_I(inod
434 unsigned tailfrags = lastfrag
435 if (tailfrags && fragment >= l
436 if (!ufs_extend_tail(i
437 &
438 goto out;
439 }
440 }
441
442 if (depth == 1) {
443 phys64 = ufs_inode_getfrag(ino
444 &er
445 } else {
446 int i;
447 phys64 = ufs_inode_getfrag(ino
448 &er
449 for (i = 1; i < depth - 1; i++
450 phys64 = ufs_inode_get
451
452 phys64 = ufs_inode_getblock(in
453 fragme
454 }
455 out:
456 if (phys64) {
457 phys64 += frag;
458 map_bh(bh_result, sb, phys64);
459 if (new)
460 set_buffer_new(bh_resu
461 }
462 mutex_unlock(&UFS_I(inode)->truncate_m
463 return err;
464
465 done:
466 if (phys64)
467 map_bh(bh_result, sb, phys64 +
468 return 0;
469 }
470
471 static int ufs_writepages(struct address_space
472 struct writeback_control *wbc)
473 {
474 return mpage_writepages(mapping, wbc,
475 }
476
477 static int ufs_read_folio(struct file *file, s
478 {
479 return block_read_full_folio(folio, uf
480 }
481
482 int ufs_prepare_chunk(struct page *page, loff_
483 {
484 return __block_write_begin(page, pos,
485 }
486
487 static void ufs_truncate_blocks(struct inode *
488
489 static void ufs_write_failed(struct address_sp
490 {
491 struct inode *inode = mapping->host;
492
493 if (to > inode->i_size) {
494 truncate_pagecache(inode, inod
495 ufs_truncate_blocks(inode);
496 }
497 }
498
499 static int ufs_write_begin(struct file *file,
500 loff_t pos, unsigned l
501 struct page **pagep, v
502 {
503 int ret;
504
505 ret = block_write_begin(mapping, pos,
506 if (unlikely(ret))
507 ufs_write_failed(mapping, pos
508
509 return ret;
510 }
511
512 static int ufs_write_end(struct file *file, st
513 loff_t pos, unsigned l
514 struct page *page, voi
515 {
516 int ret;
517
518 ret = generic_write_end(file, mapping,
519 if (ret < len)
520 ufs_write_failed(mapping, pos
521 return ret;
522 }
523
524 static sector_t ufs_bmap(struct address_space
525 {
526 return generic_block_bmap(mapping,bloc
527 }
528
529 const struct address_space_operations ufs_aops
530 .dirty_folio = block_dirty_folio,
531 .invalidate_folio = block_invalidate_f
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
540 static void ufs_set_inode_ops(struct inode *in
541 {
542 if (S_ISREG(inode->i_mode)) {
543 inode->i_op = &ufs_file_inode_
544 inode->i_fop = &ufs_file_opera
545 inode->i_mapping->a_ops = &ufs
546 } else if (S_ISDIR(inode->i_mode)) {
547 inode->i_op = &ufs_dir_inode_o
548 inode->i_fop = &ufs_dir_operat
549 inode->i_mapping->a_ops = &ufs
550 } else if (S_ISLNK(inode->i_mode)) {
551 if (!inode->i_blocks) {
552 inode->i_link = (char
553 inode->i_op = &simple_
554 } else {
555 inode->i_mapping->a_op
556 inode->i_op = &page_sy
557 inode_nohighmem(inode)
558 }
559 } else
560 init_special_inode(inode, inod
561 ufs_get_ino
562 }
563
564 static int ufs1_read_inode(struct inode *inode
565 {
566 struct ufs_inode_info *ufsi = UFS_I(in
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,
574 set_nlink(inode, fs16_to_cpu(sb, ufs_i
575 if (inode->i_nlink == 0)
576 return -ESTALE;
577
578 /*
579 * Linux now has 32-bit uid and gid, s
580 */
581 i_uid_write(inode, ufs_get_inode_uid(s
582 i_gid_write(inode, ufs_get_inode_gid(s
583
584 inode->i_size = fs64_to_cpu(sb, ufs_in
585 inode_set_atime(inode,
586 (signed)fs32_to_cpu(sb
587 0);
588 inode_set_ctime(inode,
589 (signed)fs32_to_cpu(sb
590 0);
591 inode_set_mtime(inode,
592 (signed)fs32_to_cpu(sb
593 0);
594 inode->i_blocks = fs32_to_cpu(sb, ufs_
595 inode->i_generation = fs32_to_cpu(sb,
596 ufsi->i_flags = fs32_to_cpu(sb, ufs_in
597 ufsi->i_shadow = fs32_to_cpu(sb, ufs_i
598 ufsi->i_oeftflag = fs32_to_cpu(sb, ufs
599
600
601 if (S_ISCHR(mode) || S_ISBLK(mode) ||
602 memcpy(ufsi->i_u1.i_data, &ufs
603 sizeof(ufs_inode->ui_u2
604 } else {
605 memcpy(ufsi->i_u1.i_symlink, u
606 sizeof(ufs_inode->ui_u2
607 ufsi->i_u1.i_symlink[sizeof(uf
608 }
609 return 0;
610 }
611
612 static int ufs2_read_inode(struct inode *inode
613 {
614 struct ufs_inode_info *ufsi = UFS_I(in
615 struct super_block *sb = inode->i_sb;
616 umode_t mode;
617
618 UFSD("Reading ufs2 inode, ino %lu\n",
619 /*
620 * Copy data to the in-core inode.
621 */
622 inode->i_mode = mode = fs16_to_cpu(sb,
623 set_nlink(inode, fs16_to_cpu(sb, ufs2_
624 if (inode->i_nlink == 0)
625 return -ESTALE;
626
627 /*
628 * Linux now has 32-bit uid and gid, s
629 */
630 i_uid_write(inode, fs32_to_cpu(sb, ufs
631 i_gid_write(inode, fs32_to_cpu(sb, ufs
632
633 inode->i_size = fs64_to_cpu(sb, ufs2_i
634 inode_set_atime(inode, fs64_to_cpu(sb,
635 fs32_to_cpu(sb, ufs2_i
636 inode_set_ctime(inode, fs64_to_cpu(sb,
637 fs32_to_cpu(sb, ufs2_i
638 inode_set_mtime(inode, fs64_to_cpu(sb,
639 fs32_to_cpu(sb, ufs2_i
640 inode->i_blocks = fs64_to_cpu(sb, ufs2
641 inode->i_generation = fs32_to_cpu(sb,
642 ufsi->i_flags = fs32_to_cpu(sb, ufs2_i
643 /*
644 ufsi->i_shadow = fs32_to_cpu(sb, ufs_i
645 ufsi->i_oeftflag = fs32_to_cpu(sb, ufs
646 */
647
648 if (S_ISCHR(mode) || S_ISBLK(mode) ||
649 memcpy(ufsi->i_u1.u2_i_data, &
650 sizeof(ufs2_inode->ui_u
651 } else {
652 memcpy(ufsi->i_u1.i_symlink, u
653 sizeof(ufs2_inode->ui_u
654 ufsi->i_u1.i_symlink[sizeof(uf
655 }
656 return 0;
657 }
658
659 struct inode *ufs_iget(struct super_block *sb,
660 {
661 struct ufs_inode_info *ufsi;
662 struct ufs_sb_private_info *uspi = UFS
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->
670 ufs_warning(sb, "ufs_read_inod
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
684 if (!bh) {
685 ufs_warning(sb, "ufs_read_inod
686 inode->i_ino);
687 goto bad_inode;
688 }
689 if ((UFS_SB(sb)->s_flags & UFS_TYPE_MA
690 struct ufs2_inode *ufs2_inode
691
692 err = ufs2_read_inode(inode,
693 ufs2_ino
694 } else {
695 struct ufs_inode *ufs_inode =
696
697 err = ufs1_read_inode(inode,
698 ufs_inod
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
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
716 bad_inode:
717 iget_failed(inode);
718 return ERR_PTR(err);
719 }
720
721 static void ufs1_update_inode(struct inode *in
722 {
723 struct super_block *sb = inode->i_sb;
724 struct ufs_inode_info *ufsi = UFS_I(in
725
726 ufs_inode->ui_mode = cpu_to_fs16(sb, i
727 ufs_inode->ui_nlink = cpu_to_fs16(sb,
728
729 ufs_set_inode_uid(sb, ufs_inode, i_uid
730 ufs_set_inode_gid(sb, ufs_inode, i_gid
731
732 ufs_inode->ui_size = cpu_to_fs64(sb, i
733 ufs_inode->ui_atime.tv_sec = cpu_to_fs
734
735 ufs_inode->ui_atime.tv_usec = 0;
736 ufs_inode->ui_ctime.tv_sec = cpu_to_fs
737
738 ufs_inode->ui_ctime.tv_usec = 0;
739 ufs_inode->ui_mtime.tv_sec = cpu_to_fs
740
741 ufs_inode->ui_mtime.tv_usec = 0;
742 ufs_inode->ui_blocks = cpu_to_fs32(sb,
743 ufs_inode->ui_flags = cpu_to_fs32(sb,
744 ufs_inode->ui_gen = cpu_to_fs32(sb, in
745
746 if ((UFS_SB(sb)->s_flags & UFS_UID_MAS
747 ufs_inode->ui_u3.ui_sun.ui_sha
748 ufs_inode->ui_u3.ui_sun.ui_oef
749 }
750
751 if (S_ISCHR(inode->i_mode) || S_ISBLK(
752 /* ufs_inode->ui_u2.ui_addr.ui
753 ufs_inode->ui_u2.ui_addr.ui_db
754 } else if (inode->i_blocks) {
755 memcpy(&ufs_inode->ui_u2.ui_ad
756 sizeof(ufs_inode->ui_u2
757 }
758 else {
759 memcpy(&ufs_inode->ui_u2.ui_sy
760 sizeof(ufs_inode->ui_u2
761 }
762
763 if (!inode->i_nlink)
764 memset (ufs_inode, 0, sizeof(s
765 }
766
767 static void ufs2_update_inode(struct inode *in
768 {
769 struct super_block *sb = inode->i_sb;
770 struct ufs_inode_info *ufsi = UFS_I(in
771
772 UFSD("ENTER\n");
773 ufs_inode->ui_mode = cpu_to_fs16(sb, i
774 ufs_inode->ui_nlink = cpu_to_fs16(sb,
775
776 ufs_inode->ui_uid = cpu_to_fs32(sb, i_
777 ufs_inode->ui_gid = cpu_to_fs32(sb, i_
778
779 ufs_inode->ui_size = cpu_to_fs64(sb, i
780 ufs_inode->ui_atime = cpu_to_fs64(sb,
781 ufs_inode->ui_atimensec = cpu_to_fs32(
782
783 ufs_inode->ui_ctime = cpu_to_fs64(sb,
784 ufs_inode->ui_ctimensec = cpu_to_fs32(
785
786 ufs_inode->ui_mtime = cpu_to_fs64(sb,
787 ufs_inode->ui_mtimensec = cpu_to_fs32(
788
789
790 ufs_inode->ui_blocks = cpu_to_fs64(sb,
791 ufs_inode->ui_flags = cpu_to_fs32(sb,
792 ufs_inode->ui_gen = cpu_to_fs32(sb, in
793
794 if (S_ISCHR(inode->i_mode) || S_ISBLK(
795 /* ufs_inode->ui_u2.ui_addr.ui
796 ufs_inode->ui_u2.ui_addr.ui_db
797 } else if (inode->i_blocks) {
798 memcpy(&ufs_inode->ui_u2.ui_ad
799 sizeof(ufs_inode->ui_u2
800 } else {
801 memcpy(&ufs_inode->ui_u2.ui_sy
802 sizeof(ufs_inode->ui_u2
803 }
804
805 if (!inode->i_nlink)
806 memset (ufs_inode, 0, sizeof(s
807 UFSD("EXIT\n");
808 }
809
810 static int ufs_update_inode(struct inode * ino
811 {
812 struct super_block *sb = inode->i_sb;
813 struct ufs_sb_private_info *uspi = UFS
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
820 ufs_warning (sb, "ufs_read_ino
821 return -1;
822 }
823
824 bh = sb_bread(sb, ufs_inotofsba(inode-
825 if (!bh) {
826 ufs_warning (sb, "ufs_read_ino
827 return -1;
828 }
829 if (uspi->fs_magic == UFS2_MAGIC) {
830 struct ufs2_inode *ufs2_inode
831
832 ufs2_update_inode(inode,
833 ufs2_inode +
834 } else {
835 struct ufs_inode *ufs_inode =
836
837 ufs1_update_inode(inode, ufs_i
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
849 int ufs_write_inode(struct inode *inode, struc
850 {
851 return ufs_update_inode(inode, wbc->sy
852 }
853
854 int ufs_sync_inode (struct inode *inode)
855 {
856 return ufs_update_inode (inode, 1);
857 }
858
859 void ufs_evict_inode(struct inode * inode)
860 {
861 int want_delete = 0;
862
863 if (!inode->i_nlink && !is_bad_inode(i
864 want_delete = 1;
865
866 truncate_inode_pages_final(&inode->i_d
867 if (want_delete) {
868 inode->i_size = 0;
869 if (inode->i_blocks &&
870 (S_ISREG(inode->i_mode) ||
871 S_ISLNK(inode->i_mode)))
872 ufs_truncate_blocks(in
873 ufs_update_inode(inode, inode_
874 }
875
876 invalidate_inode_buffers(inode);
877 clear_inode(inode);
878
879 if (want_delete)
880 ufs_free_inode(inode);
881 }
882
883 struct to_free {
884 struct inode *inode;
885 u64 to;
886 unsigned count;
887 };
888
889 static inline void free_data(struct to_free *c
890 {
891 if (ctx->count && ctx->to != from) {
892 ufs_free_blocks(ctx->inode, ct
893 ctx->count = 0;
894 }
895 ctx->count += count;
896 ctx->to = from + count;
897 }
898
899 #define DIRECT_FRAGMENT ((inode->i_size + uspi
900
901 static void ufs_trunc_direct(struct inode *ino
902 {
903 struct ufs_inode_info *ufsi = UFS_I(in
904 struct super_block * sb;
905 struct ufs_sb_private_info * uspi;
906 void *p;
907 u64 frag1, frag2, frag3, frag4, block1
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,
918 frag2 = ((frag1 & uspi->s_fpbmask) ? (
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 (frag
926 block2 = ufs_fragstoblks (frag
927 }
928
929 UFSD("ino %lu, frag1 %llu, frag2 %llu,
930 " frag3 %llu, frag4 %llu\n", inod
931 (unsigned long long)frag1, (unsig
932 (unsigned long long)block1, (unsi
933 (unsigned long long)frag3, (unsig
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
942 tmp = ufs_data_ptr_to_cpu(sb, p);
943 if (!tmp )
944 ufs_panic (sb, "ufs_trunc_dire
945 frag2 -= frag1;
946 frag1 = ufs_fragnum (frag1);
947
948 ufs_free_fragments(inode, tmp + frag1,
949
950 next1:
951 /*
952 * Free whole blocks
953 */
954 for (i = block1 ; i < block2; i++) {
955 p = ufs_get_direct_data_ptr(us
956 tmp = ufs_data_ptr_to_cpu(sb,
957 if (!tmp)
958 continue;
959 write_seqlock(&ufsi->meta_lock
960 ufs_data_ptr_clear(uspi, p);
961 write_sequnlock(&ufsi->meta_lo
962
963 free_data(&ctx, tmp, uspi->s_f
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
975 tmp = ufs_data_ptr_to_cpu(sb, p);
976 if (!tmp )
977 ufs_panic(sb, "ufs_truncate_di
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
989 static void free_full_branch(struct inode *ino
990 {
991 struct super_block *sb = inode->i_sb;
992 struct ufs_sb_private_info *uspi = UFS
993 struct ufs_buffer_head *ubh = ubh_brea
994 unsigned i;
995
996 if (!ubh)
997 return;
998
999 if (--depth) {
1000 for (i = 0; i < uspi->s_apb;
1001 void *p = ubh_get_dat
1002 u64 block = ufs_data_
1003 if (block)
1004 free_full_bra
1005 }
1006 } else {
1007 struct to_free ctx = {.inode
1008
1009 for (i = 0; i < uspi->s_apb;
1010 void *p = ubh_get_dat
1011 u64 block = ufs_data_
1012 if (block)
1013 free_data(&ct
1014 }
1015 free_data(&ctx, 0, 0);
1016 }
1017
1018 ubh_bforget(ubh);
1019 ufs_free_blocks(inode, ind_block, usp
1020 }
1021
1022 static void free_branch_tail(struct inode *in
1023 {
1024 struct super_block *sb = inode->i_sb;
1025 struct ufs_sb_private_info *uspi = UF
1026 unsigned i;
1027
1028 if (--depth) {
1029 for (i = from; i < uspi->s_ap
1030 void *p = ubh_get_dat
1031 u64 block = ufs_data_
1032 if (block) {
1033 write_seqlock
1034 ufs_data_ptr_
1035 write_sequnlo
1036 ubh_mark_buff
1037 free_full_bra
1038 }
1039 }
1040 } else {
1041 struct to_free ctx = {.inode
1042
1043 for (i = from; i < uspi->s_ap
1044 void *p = ubh_get_dat
1045 u64 block = ufs_data_
1046 if (block) {
1047 write_seqlock
1048 ufs_data_ptr_
1049 write_sequnlo
1050 ubh_mark_buff
1051 free_data(&ct
1052 }
1053 }
1054 free_data(&ctx, 0, 0);
1055 }
1056 if (IS_SYNC(inode) && ubh_buffer_dirt
1057 ubh_sync_block(ubh);
1058 ubh_brelse(ubh);
1059 }
1060
1061 static int ufs_alloc_lastblock(struct inode *
1062 {
1063 int err = 0;
1064 struct super_block *sb = inode->i_sb;
1065 struct address_space *mapping = inode
1066 struct ufs_sb_private_info *uspi = UF
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)
1074
1075 if (!lastfrag)
1076 goto out;
1077
1078 lastfrag--;
1079
1080 folio = ufs_get_locked_folio(mapping,
1081 (PAGE_
1082 if (IS_ERR(folio)) {
1083 err = -EIO;
1084 goto out;
1085 }
1086
1087 end = lastfrag & ((1 << (PAGE_SHIFT -
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, lastfra
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,
1102 * if it maped to hole, it alr
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_fragnu
1111 phys64 = bh->b_blocknr + 1;
1112 for (i = 0; i < end; ++i) {
1113 bh = sb_getblk(sb, i +
1114 lock_buffer(bh);
1115 memset(bh->b_data, 0,
1116 set_buffer_uptodate(bh
1117 mark_buffer_dirty(bh);
1118 unlock_buffer(bh);
1119 sync_dirty_buffer(bh);
1120 brelse(bh);
1121 }
1122 }
1123 out_unlock:
1124 ufs_put_locked_folio(folio);
1125 out:
1126 return err;
1127 }
1128
1129 static void ufs_truncate_blocks(struct inode
1130 {
1131 struct ufs_inode_info *ufsi = UFS_I(i
1132 struct super_block *sb = inode->i_sb;
1133 struct ufs_sb_private_info *uspi = UF
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_siz
1144 depth = ufs_block_to_path(ino
1145 if (!depth)
1146 return;
1147 } else {
1148 depth = 1;
1149 }
1150
1151 for (depth2 = depth - 1; depth2; dept
1152 if (offsets[depth2] != uspi->
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
1161 p = ufs_get_direct_data_ptr(u
1162 for (i = 0; i < depth2; i++)
1163 block = ufs_data_ptr_
1164 if (!block)
1165 break;
1166 ubh[i] = ubh_bread(sb
1167 if (!ubh[i]) {
1168 write_seqlock
1169 ufs_data_ptr_
1170 write_sequnlo
1171 break;
1172 }
1173 p = ubh_get_data_ptr(
1174 }
1175 while (i--)
1176 free_branch_tail(inod
1177 }
1178 for (i = offsets[0]; i <= UFS_TIND_BL
1179 p = ufs_get_direct_data_ptr(u
1180 block = ufs_data_ptr_to_cpu(s
1181 if (block) {
1182 write_seqlock(&ufsi->
1183 ufs_data_ptr_clear(us
1184 write_sequnlock(&ufsi
1185 free_full_branch(inod
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
1195 static int ufs_truncate(struct inode *inode,
1196 {
1197 int err = 0;
1198
1199 UFSD("ENTER: ino %lu, i_size: %llu, o
1200 inode->i_ino, (unsigned long lon
1201 (unsigned long long)i_size_read(
1202
1203 if (!(S_ISREG(inode->i_mode) || S_ISD
1204 S_ISLNK(inode->i_mode)))
1205 return -EINVAL;
1206 if (IS_APPEND(inode) || IS_IMMUTABLE(
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,
1215
1216 truncate_setsize(inode, size);
1217
1218 ufs_truncate_blocks(inode);
1219 inode_set_mtime_to_ts(inode, inode_se
1220 mark_inode_dirty(inode);
1221 out:
1222 UFSD("EXIT: err %d\n", err);
1223 return err;
1224 }
1225
1226 int ufs_setattr(struct mnt_idmap *idmap, stru
1227 struct iattr *attr)
1228 {
1229 struct inode *inode = d_inode(dentry)
1230 unsigned int ia_valid = attr->ia_vali
1231 int error;
1232
1233 error = setattr_prepare(&nop_mnt_idma
1234 if (error)
1235 return error;
1236
1237 if (ia_valid & ATTR_SIZE && attr->ia_
1238 error = ufs_truncate(inode, a
1239 if (error)
1240 return error;
1241 }
1242
1243 setattr_copy(&nop_mnt_idmap, inode, a
1244 mark_inode_dirty(inode);
1245 return 0;
1246 }
1247
1248 const struct inode_operations ufs_file_inode_
1249 .setattr = ufs_setattr,
1250 };
1251
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