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29#include <linux/uaccess.h>
30
31#include <linux/errno.h>
32#include <linux/fs.h>
33#include <linux/time.h>
34#include <linux/stat.h>
35#include <linux/string.h>
36#include <linux/mm.h>
37#include <linux/buffer_head.h>
38#include <linux/writeback.h>
39#include <linux/iversion.h>
40
41#include "ufs_fs.h"
42#include "ufs.h"
43#include "swab.h"
44#include "util.h"
45
46static int ufs_block_to_path(struct inode *inode, sector_t i_block, unsigned offsets[4])
47{
48 struct ufs_sb_private_info *uspi = UFS_SB(inode->i_sb)->s_uspi;
49 int ptrs = uspi->s_apb;
50 int ptrs_bits = uspi->s_apbshift;
51 const long direct_blocks = UFS_NDADDR,
52 indirect_blocks = ptrs,
53 double_blocks = (1 << (ptrs_bits * 2));
54 int n = 0;
55
56
57 UFSD("ptrs=uspi->s_apb = %d,double_blocks=%ld \n",ptrs,double_blocks);
58 if (i_block < direct_blocks) {
59 offsets[n++] = i_block;
60 } else if ((i_block -= direct_blocks) < indirect_blocks) {
61 offsets[n++] = UFS_IND_BLOCK;
62 offsets[n++] = i_block;
63 } else if ((i_block -= indirect_blocks) < double_blocks) {
64 offsets[n++] = UFS_DIND_BLOCK;
65 offsets[n++] = i_block >> ptrs_bits;
66 offsets[n++] = i_block & (ptrs - 1);
67 } else if (((i_block -= double_blocks) >> (ptrs_bits * 2)) < ptrs) {
68 offsets[n++] = UFS_TIND_BLOCK;
69 offsets[n++] = i_block >> (ptrs_bits * 2);
70 offsets[n++] = (i_block >> ptrs_bits) & (ptrs - 1);
71 offsets[n++] = i_block & (ptrs - 1);
72 } else {
73 ufs_warning(inode->i_sb, "ufs_block_to_path", "block > big");
74 }
75 return n;
76}
77
78typedef struct {
79 void *p;
80 union {
81 __fs32 key32;
82 __fs64 key64;
83 };
84 struct buffer_head *bh;
85} Indirect;
86
87static inline int grow_chain32(struct ufs_inode_info *ufsi,
88 struct buffer_head *bh, __fs32 *v,
89 Indirect *from, Indirect *to)
90{
91 Indirect *p;
92 unsigned seq;
93 to->bh = bh;
94 do {
95 seq = read_seqbegin(&ufsi->meta_lock);
96 to->key32 = *(__fs32 *)(to->p = v);
97 for (p = from; p <= to && p->key32 == *(__fs32 *)p->p; p++)
98 ;
99 } while (read_seqretry(&ufsi->meta_lock, seq));
100 return (p > to);
101}
102
103static inline int grow_chain64(struct ufs_inode_info *ufsi,
104 struct buffer_head *bh, __fs64 *v,
105 Indirect *from, Indirect *to)
106{
107 Indirect *p;
108 unsigned seq;
109 to->bh = bh;
110 do {
111 seq = read_seqbegin(&ufsi->meta_lock);
112 to->key64 = *(__fs64 *)(to->p = v);
113 for (p = from; p <= to && p->key64 == *(__fs64 *)p->p; p++)
114 ;
115 } while (read_seqretry(&ufsi->meta_lock, seq));
116 return (p > to);
117}
118
119
120
121
122
123
124static u64 ufs_frag_map(struct inode *inode, unsigned offsets[4], int depth)
125{
126 struct ufs_inode_info *ufsi = UFS_I(inode);
127 struct super_block *sb = inode->i_sb;
128 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
129 u64 mask = (u64) uspi->s_apbmask>>uspi->s_fpbshift;
130 int shift = uspi->s_apbshift-uspi->s_fpbshift;
131 Indirect chain[4], *q = chain;
132 unsigned *p;
133 unsigned flags = UFS_SB(sb)->s_flags;
134 u64 res = 0;
135
136 UFSD(": uspi->s_fpbshift = %d ,uspi->s_apbmask = %x, mask=%llx\n",
137 uspi->s_fpbshift, uspi->s_apbmask,
138 (unsigned long long)mask);
139
140 if (depth == 0)
141 goto no_block;
142
143again:
144 p = offsets;
145
146 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
147 goto ufs2;
148
149 if (!grow_chain32(ufsi, NULL, &ufsi->i_u1.i_data[*p++], chain, q))
150 goto changed;
151 if (!q->key32)
152 goto no_block;
153 while (--depth) {
154 __fs32 *ptr;
155 struct buffer_head *bh;
156 unsigned n = *p++;
157
158 bh = sb_bread(sb, uspi->s_sbbase +
159 fs32_to_cpu(sb, q->key32) + (n>>shift));
160 if (!bh)
161 goto no_block;
162 ptr = (__fs32 *)bh->b_data + (n & mask);
163 if (!grow_chain32(ufsi, bh, ptr, chain, ++q))
164 goto changed;
165 if (!q->key32)
166 goto no_block;
167 }
168 res = fs32_to_cpu(sb, q->key32);
169 goto found;
170
171ufs2:
172 if (!grow_chain64(ufsi, NULL, &ufsi->i_u1.u2_i_data[*p++], chain, q))
173 goto changed;
174 if (!q->key64)
175 goto no_block;
176
177 while (--depth) {
178 __fs64 *ptr;
179 struct buffer_head *bh;
180 unsigned n = *p++;
181
182 bh = sb_bread(sb, uspi->s_sbbase +
183 fs64_to_cpu(sb, q->key64) + (n>>shift));
184 if (!bh)
185 goto no_block;
186 ptr = (__fs64 *)bh->b_data + (n & mask);
187 if (!grow_chain64(ufsi, bh, ptr, chain, ++q))
188 goto changed;
189 if (!q->key64)
190 goto no_block;
191 }
192 res = fs64_to_cpu(sb, q->key64);
193found:
194 res += uspi->s_sbbase;
195no_block:
196 while (q > chain) {
197 brelse(q->bh);
198 q--;
199 }
200 return res;
201
202changed:
203 while (q > chain) {
204 brelse(q->bh);
205 q--;
206 }
207 goto again;
208}
209
210
211
212
213
214
215
216
217
218
219
220static bool
221ufs_extend_tail(struct inode *inode, u64 writes_to,
222 int *err, struct page *locked_page)
223{
224 struct ufs_inode_info *ufsi = UFS_I(inode);
225 struct super_block *sb = inode->i_sb;
226 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
227 unsigned lastfrag = ufsi->i_lastfrag;
228 unsigned block = ufs_fragstoblks(lastfrag);
229 unsigned new_size;
230 void *p;
231 u64 tmp;
232
233 if (writes_to < (lastfrag | uspi->s_fpbmask))
234 new_size = (writes_to & uspi->s_fpbmask) + 1;
235 else
236 new_size = uspi->s_fpb;
237
238 p = ufs_get_direct_data_ptr(uspi, ufsi, block);
239 tmp = ufs_new_fragments(inode, p, lastfrag, ufs_data_ptr_to_cpu(sb, p),
240 new_size - (lastfrag & uspi->s_fpbmask), err,
241 locked_page);
242 return tmp != 0;
243}
244
245
246
247
248
249
250
251
252
253
254static u64
255ufs_inode_getfrag(struct inode *inode, unsigned index,
256 sector_t new_fragment, int *err,
257 int *new, struct page *locked_page)
258{
259 struct ufs_inode_info *ufsi = UFS_I(inode);
260 struct super_block *sb = inode->i_sb;
261 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
262 u64 tmp, goal, lastfrag;
263 unsigned nfrags = uspi->s_fpb;
264 void *p;
265
266
267
268
269
270
271 p = ufs_get_direct_data_ptr(uspi, ufsi, index);
272 tmp = ufs_data_ptr_to_cpu(sb, p);
273 if (tmp)
274 goto out;
275
276 lastfrag = ufsi->i_lastfrag;
277
278
279 if (new_fragment < UFS_NDIR_FRAGMENT && new_fragment >= lastfrag)
280 nfrags = (new_fragment & uspi->s_fpbmask) + 1;
281
282 goal = 0;
283 if (index) {
284 goal = ufs_data_ptr_to_cpu(sb,
285 ufs_get_direct_data_ptr(uspi, ufsi, index - 1));
286 if (goal)
287 goal += uspi->s_fpb;
288 }
289 tmp = ufs_new_fragments(inode, p, ufs_blknum(new_fragment),
290 goal, nfrags, err, locked_page);
291
292 if (!tmp) {
293 *err = -ENOSPC;
294 return 0;
295 }
296
297 if (new)
298 *new = 1;
299 inode->i_ctime = current_time(inode);
300 if (IS_SYNC(inode))
301 ufs_sync_inode (inode);
302 mark_inode_dirty(inode);
303out:
304 return tmp + uspi->s_sbbase;
305
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315
316
317
318
319
320}
321
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330
331
332
333static u64
334ufs_inode_getblock(struct inode *inode, u64 ind_block,
335 unsigned index, sector_t new_fragment, int *err,
336 int *new, struct page *locked_page)
337{
338 struct super_block *sb = inode->i_sb;
339 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
340 int shift = uspi->s_apbshift - uspi->s_fpbshift;
341 u64 tmp = 0, goal;
342 struct buffer_head *bh;
343 void *p;
344
345 if (!ind_block)
346 return 0;
347
348 bh = sb_bread(sb, ind_block + (index >> shift));
349 if (unlikely(!bh)) {
350 *err = -EIO;
351 return 0;
352 }
353
354 index &= uspi->s_apbmask >> uspi->s_fpbshift;
355 if (uspi->fs_magic == UFS2_MAGIC)
356 p = (__fs64 *)bh->b_data + index;
357 else
358 p = (__fs32 *)bh->b_data + index;
359
360 tmp = ufs_data_ptr_to_cpu(sb, p);
361 if (tmp)
362 goto out;
363
364 if (index && (uspi->fs_magic == UFS2_MAGIC ?
365 (tmp = fs64_to_cpu(sb, ((__fs64 *)bh->b_data)[index-1])) :
366 (tmp = fs32_to_cpu(sb, ((__fs32 *)bh->b_data)[index-1]))))
367 goal = tmp + uspi->s_fpb;
368 else
369 goal = bh->b_blocknr + uspi->s_fpb;
370 tmp = ufs_new_fragments(inode, p, ufs_blknum(new_fragment), goal,
371 uspi->s_fpb, err, locked_page);
372 if (!tmp)
373 goto out;
374
375 if (new)
376 *new = 1;
377
378 mark_buffer_dirty(bh);
379 if (IS_SYNC(inode))
380 sync_dirty_buffer(bh);
381 inode->i_ctime = current_time(inode);
382 mark_inode_dirty(inode);
383out:
384 brelse (bh);
385 UFSD("EXIT\n");
386 if (tmp)
387 tmp += uspi->s_sbbase;
388 return tmp;
389}
390
391
392
393
394
395
396static int ufs_getfrag_block(struct inode *inode, sector_t fragment, struct buffer_head *bh_result, int create)
397{
398 struct super_block *sb = inode->i_sb;
399 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
400 int err = 0, new = 0;
401 unsigned offsets[4];
402 int depth = ufs_block_to_path(inode, fragment >> uspi->s_fpbshift, offsets);
403 u64 phys64 = 0;
404 unsigned frag = fragment & uspi->s_fpbmask;
405
406 phys64 = ufs_frag_map(inode, offsets, depth);
407 if (!create)
408 goto done;
409
410 if (phys64) {
411 if (fragment >= UFS_NDIR_FRAGMENT)
412 goto done;
413 read_seqlock_excl(&UFS_I(inode)->meta_lock);
414 if (fragment < UFS_I(inode)->i_lastfrag) {
415 read_sequnlock_excl(&UFS_I(inode)->meta_lock);
416 goto done;
417 }
418 read_sequnlock_excl(&UFS_I(inode)->meta_lock);
419 }
420
421
422 mutex_lock(&UFS_I(inode)->truncate_mutex);
423
424 UFSD("ENTER, ino %lu, fragment %llu\n", inode->i_ino, (unsigned long long)fragment);
425 if (unlikely(!depth)) {
426 ufs_warning(sb, "ufs_get_block", "block > big");
427 err = -EIO;
428 goto out;
429 }
430
431 if (UFS_I(inode)->i_lastfrag < UFS_NDIR_FRAGMENT) {
432 unsigned lastfrag = UFS_I(inode)->i_lastfrag;
433 unsigned tailfrags = lastfrag & uspi->s_fpbmask;
434 if (tailfrags && fragment >= lastfrag) {
435 if (!ufs_extend_tail(inode, fragment,
436 &err, bh_result->b_page))
437 goto out;
438 }
439 }
440
441 if (depth == 1) {
442 phys64 = ufs_inode_getfrag(inode, offsets[0], fragment,
443 &err, &new, bh_result->b_page);
444 } else {
445 int i;
446 phys64 = ufs_inode_getfrag(inode, offsets[0], fragment,
447 &err, NULL, NULL);
448 for (i = 1; i < depth - 1; i++)
449 phys64 = ufs_inode_getblock(inode, phys64, offsets[i],
450 fragment, &err, NULL, NULL);
451 phys64 = ufs_inode_getblock(inode, phys64, offsets[depth - 1],
452 fragment, &err, &new, bh_result->b_page);
453 }
454out:
455 if (phys64) {
456 phys64 += frag;
457 map_bh(bh_result, sb, phys64);
458 if (new)
459 set_buffer_new(bh_result);
460 }
461 mutex_unlock(&UFS_I(inode)->truncate_mutex);
462 return err;
463
464done:
465 if (phys64)
466 map_bh(bh_result, sb, phys64 + frag);
467 return 0;
468}
469
470static int ufs_writepage(struct page *page, struct writeback_control *wbc)
471{
472 return block_write_full_page(page,ufs_getfrag_block,wbc);
473}
474
475static int ufs_readpage(struct file *file, struct page *page)
476{
477 return block_read_full_page(page,ufs_getfrag_block);
478}
479
480int ufs_prepare_chunk(struct page *page, loff_t pos, unsigned len)
481{
482 return __block_write_begin(page, pos, len, ufs_getfrag_block);
483}
484
485static void ufs_truncate_blocks(struct inode *);
486
487static void ufs_write_failed(struct address_space *mapping, loff_t to)
488{
489 struct inode *inode = mapping->host;
490
491 if (to > inode->i_size) {
492 truncate_pagecache(inode, inode->i_size);
493 ufs_truncate_blocks(inode);
494 }
495}
496
497static int ufs_write_begin(struct file *file, struct address_space *mapping,
498 loff_t pos, unsigned len, unsigned flags,
499 struct page **pagep, void **fsdata)
500{
501 int ret;
502
503 ret = block_write_begin(mapping, pos, len, flags, pagep,
504 ufs_getfrag_block);
505 if (unlikely(ret))
506 ufs_write_failed(mapping, pos + len);
507
508 return ret;
509}
510
511static int ufs_write_end(struct file *file, struct address_space *mapping,
512 loff_t pos, unsigned len, unsigned copied,
513 struct page *page, void *fsdata)
514{
515 int ret;
516
517 ret = generic_write_end(file, mapping, pos, len, copied, page, fsdata);
518 if (ret < len)
519 ufs_write_failed(mapping, pos + len);
520 return ret;
521}
522
523static sector_t ufs_bmap(struct address_space *mapping, sector_t block)
524{
525 return generic_block_bmap(mapping,block,ufs_getfrag_block);
526}
527
528const struct address_space_operations ufs_aops = {
529 .readpage = ufs_readpage,
530 .writepage = ufs_writepage,
531 .write_begin = ufs_write_begin,
532 .write_end = ufs_write_end,
533 .bmap = ufs_bmap
534};
535
536static void ufs_set_inode_ops(struct inode *inode)
537{
538 if (S_ISREG(inode->i_mode)) {
539 inode->i_op = &ufs_file_inode_operations;
540 inode->i_fop = &ufs_file_operations;
541 inode->i_mapping->a_ops = &ufs_aops;
542 } else if (S_ISDIR(inode->i_mode)) {
543 inode->i_op = &ufs_dir_inode_operations;
544 inode->i_fop = &ufs_dir_operations;
545 inode->i_mapping->a_ops = &ufs_aops;
546 } else if (S_ISLNK(inode->i_mode)) {
547 if (!inode->i_blocks) {
548 inode->i_link = (char *)UFS_I(inode)->i_u1.i_symlink;
549 inode->i_op = &simple_symlink_inode_operations;
550 } else {
551 inode->i_mapping->a_ops = &ufs_aops;
552 inode->i_op = &page_symlink_inode_operations;
553 inode_nohighmem(inode);
554 }
555 } else
556 init_special_inode(inode, inode->i_mode,
557 ufs_get_inode_dev(inode->i_sb, UFS_I(inode)));
558}
559
560static int ufs1_read_inode(struct inode *inode, struct ufs_inode *ufs_inode)
561{
562 struct ufs_inode_info *ufsi = UFS_I(inode);
563 struct super_block *sb = inode->i_sb;
564 umode_t mode;
565
566
567
568
569 inode->i_mode = mode = fs16_to_cpu(sb, ufs_inode->ui_mode);
570 set_nlink(inode, fs16_to_cpu(sb, ufs_inode->ui_nlink));
571 if (inode->i_nlink == 0)
572 return -ESTALE;
573
574
575
576
577 i_uid_write(inode, ufs_get_inode_uid(sb, ufs_inode));
578 i_gid_write(inode, ufs_get_inode_gid(sb, ufs_inode));
579
580 inode->i_size = fs64_to_cpu(sb, ufs_inode->ui_size);
581 inode->i_atime.tv_sec = (signed)fs32_to_cpu(sb, ufs_inode->ui_atime.tv_sec);
582 inode->i_ctime.tv_sec = (signed)fs32_to_cpu(sb, ufs_inode->ui_ctime.tv_sec);
583 inode->i_mtime.tv_sec = (signed)fs32_to_cpu(sb, ufs_inode->ui_mtime.tv_sec);
584 inode->i_mtime.tv_nsec = 0;
585 inode->i_atime.tv_nsec = 0;
586 inode->i_ctime.tv_nsec = 0;
587 inode->i_blocks = fs32_to_cpu(sb, ufs_inode->ui_blocks);
588 inode->i_generation = fs32_to_cpu(sb, ufs_inode->ui_gen);
589 ufsi->i_flags = fs32_to_cpu(sb, ufs_inode->ui_flags);
590 ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow);
591 ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag);
592
593
594 if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) {
595 memcpy(ufsi->i_u1.i_data, &ufs_inode->ui_u2.ui_addr,
596 sizeof(ufs_inode->ui_u2.ui_addr));
597 } else {
598 memcpy(ufsi->i_u1.i_symlink, ufs_inode->ui_u2.ui_symlink,
599 sizeof(ufs_inode->ui_u2.ui_symlink) - 1);
600 ufsi->i_u1.i_symlink[sizeof(ufs_inode->ui_u2.ui_symlink) - 1] = 0;
601 }
602 return 0;
603}
604
605static int ufs2_read_inode(struct inode *inode, struct ufs2_inode *ufs2_inode)
606{
607 struct ufs_inode_info *ufsi = UFS_I(inode);
608 struct super_block *sb = inode->i_sb;
609 umode_t mode;
610
611 UFSD("Reading ufs2 inode, ino %lu\n", inode->i_ino);
612
613
614
615 inode->i_mode = mode = fs16_to_cpu(sb, ufs2_inode->ui_mode);
616 set_nlink(inode, fs16_to_cpu(sb, ufs2_inode->ui_nlink));
617 if (inode->i_nlink == 0)
618 return -ESTALE;
619
620
621
622
623 i_uid_write(inode, fs32_to_cpu(sb, ufs2_inode->ui_uid));
624 i_gid_write(inode, fs32_to_cpu(sb, ufs2_inode->ui_gid));
625
626 inode->i_size = fs64_to_cpu(sb, ufs2_inode->ui_size);
627 inode->i_atime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_atime);
628 inode->i_ctime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_ctime);
629 inode->i_mtime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_mtime);
630 inode->i_atime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_atimensec);
631 inode->i_ctime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_ctimensec);
632 inode->i_mtime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_mtimensec);
633 inode->i_blocks = fs64_to_cpu(sb, ufs2_inode->ui_blocks);
634 inode->i_generation = fs32_to_cpu(sb, ufs2_inode->ui_gen);
635 ufsi->i_flags = fs32_to_cpu(sb, ufs2_inode->ui_flags);
636
637
638
639
640
641 if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) {
642 memcpy(ufsi->i_u1.u2_i_data, &ufs2_inode->ui_u2.ui_addr,
643 sizeof(ufs2_inode->ui_u2.ui_addr));
644 } else {
645 memcpy(ufsi->i_u1.i_symlink, ufs2_inode->ui_u2.ui_symlink,
646 sizeof(ufs2_inode->ui_u2.ui_symlink) - 1);
647 ufsi->i_u1.i_symlink[sizeof(ufs2_inode->ui_u2.ui_symlink) - 1] = 0;
648 }
649 return 0;
650}
651
652struct inode *ufs_iget(struct super_block *sb, unsigned long ino)
653{
654 struct ufs_inode_info *ufsi;
655 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
656 struct buffer_head * bh;
657 struct inode *inode;
658 int err = -EIO;
659
660 UFSD("ENTER, ino %lu\n", ino);
661
662 if (ino < UFS_ROOTINO || ino > (uspi->s_ncg * uspi->s_ipg)) {
663 ufs_warning(sb, "ufs_read_inode", "bad inode number (%lu)\n",
664 ino);
665 return ERR_PTR(-EIO);
666 }
667
668 inode = iget_locked(sb, ino);
669 if (!inode)
670 return ERR_PTR(-ENOMEM);
671 if (!(inode->i_state & I_NEW))
672 return inode;
673
674 ufsi = UFS_I(inode);
675
676 bh = sb_bread(sb, uspi->s_sbbase + ufs_inotofsba(inode->i_ino));
677 if (!bh) {
678 ufs_warning(sb, "ufs_read_inode", "unable to read inode %lu\n",
679 inode->i_ino);
680 goto bad_inode;
681 }
682 if ((UFS_SB(sb)->s_flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
683 struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data;
684
685 err = ufs2_read_inode(inode,
686 ufs2_inode + ufs_inotofsbo(inode->i_ino));
687 } else {
688 struct ufs_inode *ufs_inode = (struct ufs_inode *)bh->b_data;
689
690 err = ufs1_read_inode(inode,
691 ufs_inode + ufs_inotofsbo(inode->i_ino));
692 }
693 brelse(bh);
694 if (err)
695 goto bad_inode;
696
697 inode_inc_iversion(inode);
698 ufsi->i_lastfrag =
699 (inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift;
700 ufsi->i_dir_start_lookup = 0;
701 ufsi->i_osync = 0;
702
703 ufs_set_inode_ops(inode);
704
705 UFSD("EXIT\n");
706 unlock_new_inode(inode);
707 return inode;
708
709bad_inode:
710 iget_failed(inode);
711 return ERR_PTR(err);
712}
713
714static void ufs1_update_inode(struct inode *inode, struct ufs_inode *ufs_inode)
715{
716 struct super_block *sb = inode->i_sb;
717 struct ufs_inode_info *ufsi = UFS_I(inode);
718
719 ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode);
720 ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink);
721
722 ufs_set_inode_uid(sb, ufs_inode, i_uid_read(inode));
723 ufs_set_inode_gid(sb, ufs_inode, i_gid_read(inode));
724
725 ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size);
726 ufs_inode->ui_atime.tv_sec = cpu_to_fs32(sb, inode->i_atime.tv_sec);
727 ufs_inode->ui_atime.tv_usec = 0;
728 ufs_inode->ui_ctime.tv_sec = cpu_to_fs32(sb, inode->i_ctime.tv_sec);
729 ufs_inode->ui_ctime.tv_usec = 0;
730 ufs_inode->ui_mtime.tv_sec = cpu_to_fs32(sb, inode->i_mtime.tv_sec);
731 ufs_inode->ui_mtime.tv_usec = 0;
732 ufs_inode->ui_blocks = cpu_to_fs32(sb, inode->i_blocks);
733 ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags);
734 ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation);
735
736 if ((UFS_SB(sb)->s_flags & UFS_UID_MASK) == UFS_UID_EFT) {
737 ufs_inode->ui_u3.ui_sun.ui_shadow = cpu_to_fs32(sb, ufsi->i_shadow);
738 ufs_inode->ui_u3.ui_sun.ui_oeftflag = cpu_to_fs32(sb, ufsi->i_oeftflag);
739 }
740
741 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
742
743 ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.i_data[0];
744 } else if (inode->i_blocks) {
745 memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.i_data,
746 sizeof(ufs_inode->ui_u2.ui_addr));
747 }
748 else {
749 memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink,
750 sizeof(ufs_inode->ui_u2.ui_symlink));
751 }
752
753 if (!inode->i_nlink)
754 memset (ufs_inode, 0, sizeof(struct ufs_inode));
755}
756
757static void ufs2_update_inode(struct inode *inode, struct ufs2_inode *ufs_inode)
758{
759 struct super_block *sb = inode->i_sb;
760 struct ufs_inode_info *ufsi = UFS_I(inode);
761
762 UFSD("ENTER\n");
763 ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode);
764 ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink);
765
766 ufs_inode->ui_uid = cpu_to_fs32(sb, i_uid_read(inode));
767 ufs_inode->ui_gid = cpu_to_fs32(sb, i_gid_read(inode));
768
769 ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size);
770 ufs_inode->ui_atime = cpu_to_fs64(sb, inode->i_atime.tv_sec);
771 ufs_inode->ui_atimensec = cpu_to_fs32(sb, inode->i_atime.tv_nsec);
772 ufs_inode->ui_ctime = cpu_to_fs64(sb, inode->i_ctime.tv_sec);
773 ufs_inode->ui_ctimensec = cpu_to_fs32(sb, inode->i_ctime.tv_nsec);
774 ufs_inode->ui_mtime = cpu_to_fs64(sb, inode->i_mtime.tv_sec);
775 ufs_inode->ui_mtimensec = cpu_to_fs32(sb, inode->i_mtime.tv_nsec);
776
777 ufs_inode->ui_blocks = cpu_to_fs64(sb, inode->i_blocks);
778 ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags);
779 ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation);
780
781 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
782
783 ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.u2_i_data[0];
784 } else if (inode->i_blocks) {
785 memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.u2_i_data,
786 sizeof(ufs_inode->ui_u2.ui_addr));
787 } else {
788 memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink,
789 sizeof(ufs_inode->ui_u2.ui_symlink));
790 }
791
792 if (!inode->i_nlink)
793 memset (ufs_inode, 0, sizeof(struct ufs2_inode));
794 UFSD("EXIT\n");
795}
796
797static int ufs_update_inode(struct inode * inode, int do_sync)
798{
799 struct super_block *sb = inode->i_sb;
800 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
801 struct buffer_head * bh;
802
803 UFSD("ENTER, ino %lu\n", inode->i_ino);
804
805 if (inode->i_ino < UFS_ROOTINO ||
806 inode->i_ino > (uspi->s_ncg * uspi->s_ipg)) {
807 ufs_warning (sb, "ufs_read_inode", "bad inode number (%lu)\n", inode->i_ino);
808 return -1;
809 }
810
811 bh = sb_bread(sb, ufs_inotofsba(inode->i_ino));
812 if (!bh) {
813 ufs_warning (sb, "ufs_read_inode", "unable to read inode %lu\n", inode->i_ino);
814 return -1;
815 }
816 if (uspi->fs_magic == UFS2_MAGIC) {
817 struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data;
818
819 ufs2_update_inode(inode,
820 ufs2_inode + ufs_inotofsbo(inode->i_ino));
821 } else {
822 struct ufs_inode *ufs_inode = (struct ufs_inode *) bh->b_data;
823
824 ufs1_update_inode(inode, ufs_inode + ufs_inotofsbo(inode->i_ino));
825 }
826
827 mark_buffer_dirty(bh);
828 if (do_sync)
829 sync_dirty_buffer(bh);
830 brelse (bh);
831
832 UFSD("EXIT\n");
833 return 0;
834}
835
836int ufs_write_inode(struct inode *inode, struct writeback_control *wbc)
837{
838 return ufs_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL);
839}
840
841int ufs_sync_inode (struct inode *inode)
842{
843 return ufs_update_inode (inode, 1);
844}
845
846void ufs_evict_inode(struct inode * inode)
847{
848 int want_delete = 0;
849
850 if (!inode->i_nlink && !is_bad_inode(inode))
851 want_delete = 1;
852
853 truncate_inode_pages_final(&inode->i_data);
854 if (want_delete) {
855 inode->i_size = 0;
856 if (inode->i_blocks &&
857 (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
858 S_ISLNK(inode->i_mode)))
859 ufs_truncate_blocks(inode);
860 ufs_update_inode(inode, inode_needs_sync(inode));
861 }
862
863 invalidate_inode_buffers(inode);
864 clear_inode(inode);
865
866 if (want_delete)
867 ufs_free_inode(inode);
868}
869
870struct to_free {
871 struct inode *inode;
872 u64 to;
873 unsigned count;
874};
875
876static inline void free_data(struct to_free *ctx, u64 from, unsigned count)
877{
878 if (ctx->count && ctx->to != from) {
879 ufs_free_blocks(ctx->inode, ctx->to - ctx->count, ctx->count);
880 ctx->count = 0;
881 }
882 ctx->count += count;
883 ctx->to = from + count;
884}
885
886#define DIRECT_FRAGMENT ((inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift)
887
888static void ufs_trunc_direct(struct inode *inode)
889{
890 struct ufs_inode_info *ufsi = UFS_I(inode);
891 struct super_block * sb;
892 struct ufs_sb_private_info * uspi;
893 void *p;
894 u64 frag1, frag2, frag3, frag4, block1, block2;
895 struct to_free ctx = {.inode = inode};
896 unsigned i, tmp;
897
898 UFSD("ENTER: ino %lu\n", inode->i_ino);
899
900 sb = inode->i_sb;
901 uspi = UFS_SB(sb)->s_uspi;
902
903 frag1 = DIRECT_FRAGMENT;
904 frag4 = min_t(u64, UFS_NDIR_FRAGMENT, ufsi->i_lastfrag);
905 frag2 = ((frag1 & uspi->s_fpbmask) ? ((frag1 | uspi->s_fpbmask) + 1) : frag1);
906 frag3 = frag4 & ~uspi->s_fpbmask;
907 block1 = block2 = 0;
908 if (frag2 > frag3) {
909 frag2 = frag4;
910 frag3 = frag4 = 0;
911 } else if (frag2 < frag3) {
912 block1 = ufs_fragstoblks (frag2);
913 block2 = ufs_fragstoblks (frag3);
914 }
915
916 UFSD("ino %lu, frag1 %llu, frag2 %llu, block1 %llu, block2 %llu,"
917 " frag3 %llu, frag4 %llu\n", inode->i_ino,
918 (unsigned long long)frag1, (unsigned long long)frag2,
919 (unsigned long long)block1, (unsigned long long)block2,
920 (unsigned long long)frag3, (unsigned long long)frag4);
921
922 if (frag1 >= frag2)
923 goto next1;
924
925
926
927
928 p = ufs_get_direct_data_ptr(uspi, ufsi, ufs_fragstoblks(frag1));
929 tmp = ufs_data_ptr_to_cpu(sb, p);
930 if (!tmp )
931 ufs_panic (sb, "ufs_trunc_direct", "internal error");
932 frag2 -= frag1;
933 frag1 = ufs_fragnum (frag1);
934
935 ufs_free_fragments(inode, tmp + frag1, frag2);
936
937next1:
938
939
940
941 for (i = block1 ; i < block2; i++) {
942 p = ufs_get_direct_data_ptr(uspi, ufsi, i);
943 tmp = ufs_data_ptr_to_cpu(sb, p);
944 if (!tmp)
945 continue;
946 write_seqlock(&ufsi->meta_lock);
947 ufs_data_ptr_clear(uspi, p);
948 write_sequnlock(&ufsi->meta_lock);
949
950 free_data(&ctx, tmp, uspi->s_fpb);
951 }
952
953 free_data(&ctx, 0, 0);
954
955 if (frag3 >= frag4)
956 goto next3;
957
958
959
960
961 p = ufs_get_direct_data_ptr(uspi, ufsi, ufs_fragstoblks(frag3));
962 tmp = ufs_data_ptr_to_cpu(sb, p);
963 if (!tmp )
964 ufs_panic(sb, "ufs_truncate_direct", "internal error");
965 frag4 = ufs_fragnum (frag4);
966 write_seqlock(&ufsi->meta_lock);
967 ufs_data_ptr_clear(uspi, p);
968 write_sequnlock(&ufsi->meta_lock);
969
970 ufs_free_fragments (inode, tmp, frag4);
971 next3:
972
973 UFSD("EXIT: ino %lu\n", inode->i_ino);
974}
975
976static void free_full_branch(struct inode *inode, u64 ind_block, int depth)
977{
978 struct super_block *sb = inode->i_sb;
979 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
980 struct ufs_buffer_head *ubh = ubh_bread(sb, ind_block, uspi->s_bsize);
981 unsigned i;
982
983 if (!ubh)
984 return;
985
986 if (--depth) {
987 for (i = 0; i < uspi->s_apb; i++) {
988 void *p = ubh_get_data_ptr(uspi, ubh, i);
989 u64 block = ufs_data_ptr_to_cpu(sb, p);
990 if (block)
991 free_full_branch(inode, block, depth);
992 }
993 } else {
994 struct to_free ctx = {.inode = inode};
995
996 for (i = 0; i < uspi->s_apb; i++) {
997 void *p = ubh_get_data_ptr(uspi, ubh, i);
998 u64 block = ufs_data_ptr_to_cpu(sb, p);
999 if (block)
1000 free_data(&ctx, block, uspi->s_fpb);
1001 }
1002 free_data(&ctx, 0, 0);
1003 }
1004
1005 ubh_bforget(ubh);
1006 ufs_free_blocks(inode, ind_block, uspi->s_fpb);
1007}
1008
1009static void free_branch_tail(struct inode *inode, unsigned from, struct ufs_buffer_head *ubh, int depth)
1010{
1011 struct super_block *sb = inode->i_sb;
1012 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
1013 unsigned i;
1014
1015 if (--depth) {
1016 for (i = from; i < uspi->s_apb ; i++) {
1017 void *p = ubh_get_data_ptr(uspi, ubh, i);
1018 u64 block = ufs_data_ptr_to_cpu(sb, p);
1019 if (block) {
1020 write_seqlock(&UFS_I(inode)->meta_lock);
1021 ufs_data_ptr_clear(uspi, p);
1022 write_sequnlock(&UFS_I(inode)->meta_lock);
1023 ubh_mark_buffer_dirty(ubh);
1024 free_full_branch(inode, block, depth);
1025 }
1026 }
1027 } else {
1028 struct to_free ctx = {.inode = inode};
1029
1030 for (i = from; i < uspi->s_apb; i++) {
1031 void *p = ubh_get_data_ptr(uspi, ubh, i);
1032 u64 block = ufs_data_ptr_to_cpu(sb, p);
1033 if (block) {
1034 write_seqlock(&UFS_I(inode)->meta_lock);
1035 ufs_data_ptr_clear(uspi, p);
1036 write_sequnlock(&UFS_I(inode)->meta_lock);
1037 ubh_mark_buffer_dirty(ubh);
1038 free_data(&ctx, block, uspi->s_fpb);
1039 }
1040 }
1041 free_data(&ctx, 0, 0);
1042 }
1043 if (IS_SYNC(inode) && ubh_buffer_dirty(ubh))
1044 ubh_sync_block(ubh);
1045 ubh_brelse(ubh);
1046}
1047
1048static int ufs_alloc_lastblock(struct inode *inode, loff_t size)
1049{
1050 int err = 0;
1051 struct super_block *sb = inode->i_sb;
1052 struct address_space *mapping = inode->i_mapping;
1053 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
1054 unsigned i, end;
1055 sector_t lastfrag;
1056 struct page *lastpage;
1057 struct buffer_head *bh;
1058 u64 phys64;
1059
1060 lastfrag = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
1061
1062 if (!lastfrag)
1063 goto out;
1064
1065 lastfrag--;
1066
1067 lastpage = ufs_get_locked_page(mapping, lastfrag >>
1068 (PAGE_SHIFT - inode->i_blkbits));
1069 if (IS_ERR(lastpage)) {
1070 err = -EIO;
1071 goto out;
1072 }
1073
1074 end = lastfrag & ((1 << (PAGE_SHIFT - inode->i_blkbits)) - 1);
1075 bh = page_buffers(lastpage);
1076 for (i = 0; i < end; ++i)
1077 bh = bh->b_this_page;
1078
1079
1080 err = ufs_getfrag_block(inode, lastfrag, bh, 1);
1081
1082 if (unlikely(err))
1083 goto out_unlock;
1084
1085 if (buffer_new(bh)) {
1086 clear_buffer_new(bh);
1087 clean_bdev_bh_alias(bh);
1088
1089
1090
1091
1092 set_buffer_uptodate(bh);
1093 mark_buffer_dirty(bh);
1094 set_page_dirty(lastpage);
1095 }
1096
1097 if (lastfrag >= UFS_IND_FRAGMENT) {
1098 end = uspi->s_fpb - ufs_fragnum(lastfrag) - 1;
1099 phys64 = bh->b_blocknr + 1;
1100 for (i = 0; i < end; ++i) {
1101 bh = sb_getblk(sb, i + phys64);
1102 lock_buffer(bh);
1103 memset(bh->b_data, 0, sb->s_blocksize);
1104 set_buffer_uptodate(bh);
1105 mark_buffer_dirty(bh);
1106 unlock_buffer(bh);
1107 sync_dirty_buffer(bh);
1108 brelse(bh);
1109 }
1110 }
1111out_unlock:
1112 ufs_put_locked_page(lastpage);
1113out:
1114 return err;
1115}
1116
1117static void ufs_truncate_blocks(struct inode *inode)
1118{
1119 struct ufs_inode_info *ufsi = UFS_I(inode);
1120 struct super_block *sb = inode->i_sb;
1121 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
1122 unsigned offsets[4];
1123 int depth;
1124 int depth2;
1125 unsigned i;
1126 struct ufs_buffer_head *ubh[3];
1127 void *p;
1128 u64 block;
1129
1130 if (inode->i_size) {
1131 sector_t last = (inode->i_size - 1) >> uspi->s_bshift;
1132 depth = ufs_block_to_path(inode, last, offsets);
1133 if (!depth)
1134 return;
1135 } else {
1136 depth = 1;
1137 }
1138
1139 for (depth2 = depth - 1; depth2; depth2--)
1140 if (offsets[depth2] != uspi->s_apb - 1)
1141 break;
1142
1143 mutex_lock(&ufsi->truncate_mutex);
1144 if (depth == 1) {
1145 ufs_trunc_direct(inode);
1146 offsets[0] = UFS_IND_BLOCK;
1147 } else {
1148
1149 p = ufs_get_direct_data_ptr(uspi, ufsi, offsets[0]++);
1150 for (i = 0; i < depth2; i++) {
1151 block = ufs_data_ptr_to_cpu(sb, p);
1152 if (!block)
1153 break;
1154 ubh[i] = ubh_bread(sb, block, uspi->s_bsize);
1155 if (!ubh[i]) {
1156 write_seqlock(&ufsi->meta_lock);
1157 ufs_data_ptr_clear(uspi, p);
1158 write_sequnlock(&ufsi->meta_lock);
1159 break;
1160 }
1161 p = ubh_get_data_ptr(uspi, ubh[i], offsets[i + 1]++);
1162 }
1163 while (i--)
1164 free_branch_tail(inode, offsets[i + 1], ubh[i], depth - i - 1);
1165 }
1166 for (i = offsets[0]; i <= UFS_TIND_BLOCK; i++) {
1167 p = ufs_get_direct_data_ptr(uspi, ufsi, i);
1168 block = ufs_data_ptr_to_cpu(sb, p);
1169 if (block) {
1170 write_seqlock(&ufsi->meta_lock);
1171 ufs_data_ptr_clear(uspi, p);
1172 write_sequnlock(&ufsi->meta_lock);
1173 free_full_branch(inode, block, i - UFS_IND_BLOCK + 1);
1174 }
1175 }
1176 read_seqlock_excl(&ufsi->meta_lock);
1177 ufsi->i_lastfrag = DIRECT_FRAGMENT;
1178 read_sequnlock_excl(&ufsi->meta_lock);
1179 mark_inode_dirty(inode);
1180 mutex_unlock(&ufsi->truncate_mutex);
1181}
1182
1183static int ufs_truncate(struct inode *inode, loff_t size)
1184{
1185 int err = 0;
1186
1187 UFSD("ENTER: ino %lu, i_size: %llu, old_i_size: %llu\n",
1188 inode->i_ino, (unsigned long long)size,
1189 (unsigned long long)i_size_read(inode));
1190
1191 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
1192 S_ISLNK(inode->i_mode)))
1193 return -EINVAL;
1194 if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
1195 return -EPERM;
1196
1197 err = ufs_alloc_lastblock(inode, size);
1198
1199 if (err)
1200 goto out;
1201
1202 block_truncate_page(inode->i_mapping, size, ufs_getfrag_block);
1203
1204 truncate_setsize(inode, size);
1205
1206 ufs_truncate_blocks(inode);
1207 inode->i_mtime = inode->i_ctime = current_time(inode);
1208 mark_inode_dirty(inode);
1209out:
1210 UFSD("EXIT: err %d\n", err);
1211 return err;
1212}
1213
1214int ufs_setattr(struct dentry *dentry, struct iattr *attr)
1215{
1216 struct inode *inode = d_inode(dentry);
1217 unsigned int ia_valid = attr->ia_valid;
1218 int error;
1219
1220 error = setattr_prepare(dentry, attr);
1221 if (error)
1222 return error;
1223
1224 if (ia_valid & ATTR_SIZE && attr->ia_size != inode->i_size) {
1225 error = ufs_truncate(inode, attr->ia_size);
1226 if (error)
1227 return error;
1228 }
1229
1230 setattr_copy(inode, attr);
1231 mark_inode_dirty(inode);
1232 return 0;
1233}
1234
1235const struct inode_operations ufs_file_inode_operations = {
1236 .setattr = ufs_setattr,
1237};
1238
