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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * linux/fs/ufs/inode.c
4 *
5 * Copyright (C) 1998
6 * Daniel Pirkl <daniel.pirkl@email.cz>
7 * Charles University, Faculty of Mathematics and Physics
8 *
9 * from
10 *
11 * linux/fs/ext2/inode.c
12 *
13 * Copyright (C) 1992, 1993, 1994, 1995
14 * Remy Card (card@masi.ibp.fr)
15 * Laboratoire MASI - Institut Blaise Pascal
16 * Universite Pierre et Marie Curie (Paris VI)
17 *
18 * from
19 *
20 * linux/fs/minix/inode.c
21 *
22 * Copyright (C) 1991, 1992 Linus Torvalds
23 *
24 * Goal-directed block allocation by Stephen Tweedie (sct@dcs.ed.ac.uk), 1993
25 * Big-endian to little-endian byte-swapping/bitmaps by
26 * David S. Miller (davem@caip.rutgers.edu), 1995
27 */
28
29#include <linux/uaccess.h>
30
31#include <linux/errno.h>
32#include <linux/fs.h>
33#include <linux/time.h>
34#include <linux/stat.h>
35#include <linux/string.h>
36#include <linux/mm.h>
37#include <linux/buffer_head.h>
38#include <linux/writeback.h>
39#include <linux/iversion.h>
40
41#include "ufs_fs.h"
42#include "ufs.h"
43#include "swab.h"
44#include "util.h"
45
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 * Returns the location of the fragment from
121 * the beginning of the filesystem.
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 * Unpacking tails: we have a file with partial final block and
212 * we had been asked to extend it. If the fragment being written
213 * is within the same block, we need to extend the tail just to cover
214 * that fragment. Otherwise the tail is extended to full block.
215 *
216 * Note that we might need to create a _new_ tail, but that will
217 * be handled elsewhere; this is strictly for resizing old
218 * ones.
219 */
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; /* it's a short file, so unsigned is enough */
228 unsigned block = ufs_fragstoblks(lastfrag);
229 unsigned new_size;
230 void *p;
231 u64 tmp;
232
233 if (writes_to < (lastfrag | uspi->s_fpbmask))
234 new_size = (writes_to & uspi->s_fpbmask) + 1;
235 else
236 new_size = uspi->s_fpb;
237
238 p = ufs_get_direct_data_ptr(uspi, ufsi, block);
239 tmp = ufs_new_fragments(inode, p, lastfrag, ufs_data_ptr_to_cpu(sb, p),
240 new_size - (lastfrag & uspi->s_fpbmask), err,
241 locked_page);
242 return tmp != 0;
243}
244
245/**
246 * ufs_inode_getfrag() - allocate new fragment(s)
247 * @inode: pointer to inode
248 * @index: number of block pointer within the inode's array.
249 * @new_fragment: number of new allocated fragment(s)
250 * @err: we set it if something wrong
251 * @new: we set it if we allocate new block
252 * @locked_page: for ufs_new_fragments()
253 */
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 /* TODO : to be done for write support
267 if ( (flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
268 goto ufs2;
269 */
270
271 p = ufs_get_direct_data_ptr(uspi, ufsi, index);
272 tmp = ufs_data_ptr_to_cpu(sb, p);
273 if (tmp)
274 goto out;
275
276 lastfrag = ufsi->i_lastfrag;
277
278 /* will that be a new tail? */
279 if (new_fragment < UFS_NDIR_FRAGMENT && new_fragment >= lastfrag)
280 nfrags = (new_fragment & uspi->s_fpbmask) + 1;
281
282 goal = 0;
283 if (index) {
284 goal = ufs_data_ptr_to_cpu(sb,
285 ufs_get_direct_data_ptr(uspi, ufsi, index - 1));
286 if (goal)
287 goal += uspi->s_fpb;
288 }
289 tmp = ufs_new_fragments(inode, p, ufs_blknum(new_fragment),
290 goal, nfrags, err, locked_page);
291
292 if (!tmp) {
293 *err = -ENOSPC;
294 return 0;
295 }
296
297 if (new)
298 *new = 1;
299 inode->i_ctime = current_time(inode);
300 if (IS_SYNC(inode))
301 ufs_sync_inode (inode);
302 mark_inode_dirty(inode);
303out:
304 return tmp + uspi->s_sbbase;
305
306 /* This part : To be implemented ....
307 Required only for writing, not required for READ-ONLY.
308ufs2:
309
310 u2_block = ufs_fragstoblks(fragment);
311 u2_blockoff = ufs_fragnum(fragment);
312 p = ufsi->i_u1.u2_i_data + block;
313 goal = 0;
314
315repeat2:
316 tmp = fs32_to_cpu(sb, *p);
317 lastfrag = ufsi->i_lastfrag;
318
319 */
320}
321
322/**
323 * ufs_inode_getblock() - allocate new block
324 * @inode: pointer to inode
325 * @ind_block: block number of the indirect block
326 * @index: number of pointer within the indirect block
327 * @new_fragment: number of new allocated fragment
328 * (block will hold this fragment and also uspi->s_fpb-1)
329 * @err: see ufs_inode_getfrag()
330 * @new: see ufs_inode_getfrag()
331 * @locked_page: see ufs_inode_getfrag()
332 */
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 * ufs_getfrag_block() - `get_block_t' function, interface between UFS and
393 * readpage, writepage and so on
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 /* This code entered only while writing ....? */
421
422 mutex_lock(&UFS_I(inode)->truncate_mutex);
423
424 UFSD("ENTER, ino %lu, fragment %llu\n", inode->i_ino, (unsigned long long)fragment);
425 if (unlikely(!depth)) {
426 ufs_warning(sb, "ufs_get_block", "block > big");
427 err = -EIO;
428 goto out;
429 }
430
431 if (UFS_I(inode)->i_lastfrag < UFS_NDIR_FRAGMENT) {
432 unsigned lastfrag = UFS_I(inode)->i_lastfrag;
433 unsigned tailfrags = lastfrag & uspi->s_fpbmask;
434 if (tailfrags && fragment >= lastfrag) {
435 if (!ufs_extend_tail(inode, fragment,
436 &err, bh_result->b_page))
437 goto out;
438 }
439 }
440
441 if (depth == 1) {
442 phys64 = ufs_inode_getfrag(inode, offsets[0], fragment,
443 &err, &new, bh_result->b_page);
444 } else {
445 int i;
446 phys64 = ufs_inode_getfrag(inode, offsets[0], fragment,
447 &err, NULL, NULL);
448 for (i = 1; i < depth - 1; i++)
449 phys64 = ufs_inode_getblock(inode, phys64, offsets[i],
450 fragment, &err, NULL, NULL);
451 phys64 = ufs_inode_getblock(inode, phys64, offsets[depth - 1],
452 fragment, &err, &new, bh_result->b_page);
453 }
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 .set_page_dirty = __set_page_dirty_buffers,
530 .readpage = ufs_readpage,
531 .writepage = ufs_writepage,
532 .write_begin = ufs_write_begin,
533 .write_end = ufs_write_end,
534 .bmap = ufs_bmap
535};
536
537static void ufs_set_inode_ops(struct inode *inode)
538{
539 if (S_ISREG(inode->i_mode)) {
540 inode->i_op = &ufs_file_inode_operations;
541 inode->i_fop = &ufs_file_operations;
542 inode->i_mapping->a_ops = &ufs_aops;
543 } else if (S_ISDIR(inode->i_mode)) {
544 inode->i_op = &ufs_dir_inode_operations;
545 inode->i_fop = &ufs_dir_operations;
546 inode->i_mapping->a_ops = &ufs_aops;
547 } else if (S_ISLNK(inode->i_mode)) {
548 if (!inode->i_blocks) {
549 inode->i_link = (char *)UFS_I(inode)->i_u1.i_symlink;
550 inode->i_op = &simple_symlink_inode_operations;
551 } else {
552 inode->i_mapping->a_ops = &ufs_aops;
553 inode->i_op = &page_symlink_inode_operations;
554 inode_nohighmem(inode);
555 }
556 } else
557 init_special_inode(inode, inode->i_mode,
558 ufs_get_inode_dev(inode->i_sb, UFS_I(inode)));
559}
560
561static int ufs1_read_inode(struct inode *inode, struct ufs_inode *ufs_inode)
562{
563 struct ufs_inode_info *ufsi = UFS_I(inode);
564 struct super_block *sb = inode->i_sb;
565 umode_t mode;
566
567 /*
568 * Copy data to the in-core inode.
569 */
570 inode->i_mode = mode = fs16_to_cpu(sb, ufs_inode->ui_mode);
571 set_nlink(inode, fs16_to_cpu(sb, ufs_inode->ui_nlink));
572 if (inode->i_nlink == 0)
573 return -ESTALE;
574
575 /*
576 * Linux now has 32-bit uid and gid, so we can support EFT.
577 */
578 i_uid_write(inode, ufs_get_inode_uid(sb, ufs_inode));
579 i_gid_write(inode, ufs_get_inode_gid(sb, ufs_inode));
580
581 inode->i_size = fs64_to_cpu(sb, ufs_inode->ui_size);
582 inode->i_atime.tv_sec = (signed)fs32_to_cpu(sb, ufs_inode->ui_atime.tv_sec);
583 inode->i_ctime.tv_sec = (signed)fs32_to_cpu(sb, ufs_inode->ui_ctime.tv_sec);
584 inode->i_mtime.tv_sec = (signed)fs32_to_cpu(sb, ufs_inode->ui_mtime.tv_sec);
585 inode->i_mtime.tv_nsec = 0;
586 inode->i_atime.tv_nsec = 0;
587 inode->i_ctime.tv_nsec = 0;
588 inode->i_blocks = fs32_to_cpu(sb, ufs_inode->ui_blocks);
589 inode->i_generation = fs32_to_cpu(sb, ufs_inode->ui_gen);
590 ufsi->i_flags = fs32_to_cpu(sb, ufs_inode->ui_flags);
591 ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow);
592 ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag);
593
594
595 if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) {
596 memcpy(ufsi->i_u1.i_data, &ufs_inode->ui_u2.ui_addr,
597 sizeof(ufs_inode->ui_u2.ui_addr));
598 } else {
599 memcpy(ufsi->i_u1.i_symlink, ufs_inode->ui_u2.ui_symlink,
600 sizeof(ufs_inode->ui_u2.ui_symlink) - 1);
601 ufsi->i_u1.i_symlink[sizeof(ufs_inode->ui_u2.ui_symlink) - 1] = 0;
602 }
603 return 0;
604}
605
606static int ufs2_read_inode(struct inode *inode, struct ufs2_inode *ufs2_inode)
607{
608 struct ufs_inode_info *ufsi = UFS_I(inode);
609 struct super_block *sb = inode->i_sb;
610 umode_t mode;
611
612 UFSD("Reading ufs2 inode, ino %lu\n", inode->i_ino);
613 /*
614 * Copy data to the in-core inode.
615 */
616 inode->i_mode = mode = fs16_to_cpu(sb, ufs2_inode->ui_mode);
617 set_nlink(inode, fs16_to_cpu(sb, ufs2_inode->ui_nlink));
618 if (inode->i_nlink == 0)
619 return -ESTALE;
620
621 /*
622 * Linux now has 32-bit uid and gid, so we can support EFT.
623 */
624 i_uid_write(inode, fs32_to_cpu(sb, ufs2_inode->ui_uid));
625 i_gid_write(inode, fs32_to_cpu(sb, ufs2_inode->ui_gid));
626
627 inode->i_size = fs64_to_cpu(sb, ufs2_inode->ui_size);
628 inode->i_atime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_atime);
629 inode->i_ctime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_ctime);
630 inode->i_mtime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_mtime);
631 inode->i_atime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_atimensec);
632 inode->i_ctime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_ctimensec);
633 inode->i_mtime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_mtimensec);
634 inode->i_blocks = fs64_to_cpu(sb, ufs2_inode->ui_blocks);
635 inode->i_generation = fs32_to_cpu(sb, ufs2_inode->ui_gen);
636 ufsi->i_flags = fs32_to_cpu(sb, ufs2_inode->ui_flags);
637 /*
638 ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow);
639 ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag);
640 */
641
642 if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) {
643 memcpy(ufsi->i_u1.u2_i_data, &ufs2_inode->ui_u2.ui_addr,
644 sizeof(ufs2_inode->ui_u2.ui_addr));
645 } else {
646 memcpy(ufsi->i_u1.i_symlink, ufs2_inode->ui_u2.ui_symlink,
647 sizeof(ufs2_inode->ui_u2.ui_symlink) - 1);
648 ufsi->i_u1.i_symlink[sizeof(ufs2_inode->ui_u2.ui_symlink) - 1] = 0;
649 }
650 return 0;
651}
652
653struct inode *ufs_iget(struct super_block *sb, unsigned long ino)
654{
655 struct ufs_inode_info *ufsi;
656 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
657 struct buffer_head * bh;
658 struct inode *inode;
659 int err = -EIO;
660
661 UFSD("ENTER, ino %lu\n", ino);
662
663 if (ino < UFS_ROOTINO || ino > (uspi->s_ncg * uspi->s_ipg)) {
664 ufs_warning(sb, "ufs_read_inode", "bad inode number (%lu)\n",
665 ino);
666 return ERR_PTR(-EIO);
667 }
668
669 inode = iget_locked(sb, ino);
670 if (!inode)
671 return ERR_PTR(-ENOMEM);
672 if (!(inode->i_state & I_NEW))
673 return inode;
674
675 ufsi = UFS_I(inode);
676
677 bh = sb_bread(sb, uspi->s_sbbase + ufs_inotofsba(inode->i_ino));
678 if (!bh) {
679 ufs_warning(sb, "ufs_read_inode", "unable to read inode %lu\n",
680 inode->i_ino);
681 goto bad_inode;
682 }
683 if ((UFS_SB(sb)->s_flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
684 struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data;
685
686 err = ufs2_read_inode(inode,
687 ufs2_inode + ufs_inotofsbo(inode->i_ino));
688 } else {
689 struct ufs_inode *ufs_inode = (struct ufs_inode *)bh->b_data;
690
691 err = ufs1_read_inode(inode,
692 ufs_inode + ufs_inotofsbo(inode->i_ino));
693 }
694 brelse(bh);
695 if (err)
696 goto bad_inode;
697
698 inode_inc_iversion(inode);
699 ufsi->i_lastfrag =
700 (inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift;
701 ufsi->i_dir_start_lookup = 0;
702 ufsi->i_osync = 0;
703
704 ufs_set_inode_ops(inode);
705
706 UFSD("EXIT\n");
707 unlock_new_inode(inode);
708 return inode;
709
710bad_inode:
711 iget_failed(inode);
712 return ERR_PTR(err);
713}
714
715static void ufs1_update_inode(struct inode *inode, struct ufs_inode *ufs_inode)
716{
717 struct super_block *sb = inode->i_sb;
718 struct ufs_inode_info *ufsi = UFS_I(inode);
719
720 ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode);
721 ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink);
722
723 ufs_set_inode_uid(sb, ufs_inode, i_uid_read(inode));
724 ufs_set_inode_gid(sb, ufs_inode, i_gid_read(inode));
725
726 ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size);
727 ufs_inode->ui_atime.tv_sec = cpu_to_fs32(sb, inode->i_atime.tv_sec);
728 ufs_inode->ui_atime.tv_usec = 0;
729 ufs_inode->ui_ctime.tv_sec = cpu_to_fs32(sb, inode->i_ctime.tv_sec);
730 ufs_inode->ui_ctime.tv_usec = 0;
731 ufs_inode->ui_mtime.tv_sec = cpu_to_fs32(sb, inode->i_mtime.tv_sec);
732 ufs_inode->ui_mtime.tv_usec = 0;
733 ufs_inode->ui_blocks = cpu_to_fs32(sb, inode->i_blocks);
734 ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags);
735 ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation);
736
737 if ((UFS_SB(sb)->s_flags & UFS_UID_MASK) == UFS_UID_EFT) {
738 ufs_inode->ui_u3.ui_sun.ui_shadow = cpu_to_fs32(sb, ufsi->i_shadow);
739 ufs_inode->ui_u3.ui_sun.ui_oeftflag = cpu_to_fs32(sb, ufsi->i_oeftflag);
740 }
741
742 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
743 /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */
744 ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.i_data[0];
745 } else if (inode->i_blocks) {
746 memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.i_data,
747 sizeof(ufs_inode->ui_u2.ui_addr));
748 }
749 else {
750 memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink,
751 sizeof(ufs_inode->ui_u2.ui_symlink));
752 }
753
754 if (!inode->i_nlink)
755 memset (ufs_inode, 0, sizeof(struct ufs_inode));
756}
757
758static void ufs2_update_inode(struct inode *inode, struct ufs2_inode *ufs_inode)
759{
760 struct super_block *sb = inode->i_sb;
761 struct ufs_inode_info *ufsi = UFS_I(inode);
762
763 UFSD("ENTER\n");
764 ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode);
765 ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink);
766
767 ufs_inode->ui_uid = cpu_to_fs32(sb, i_uid_read(inode));
768 ufs_inode->ui_gid = cpu_to_fs32(sb, i_gid_read(inode));
769
770 ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size);
771 ufs_inode->ui_atime = cpu_to_fs64(sb, inode->i_atime.tv_sec);
772 ufs_inode->ui_atimensec = cpu_to_fs32(sb, inode->i_atime.tv_nsec);
773 ufs_inode->ui_ctime = cpu_to_fs64(sb, inode->i_ctime.tv_sec);
774 ufs_inode->ui_ctimensec = cpu_to_fs32(sb, inode->i_ctime.tv_nsec);
775 ufs_inode->ui_mtime = cpu_to_fs64(sb, inode->i_mtime.tv_sec);
776 ufs_inode->ui_mtimensec = cpu_to_fs32(sb, inode->i_mtime.tv_nsec);
777
778 ufs_inode->ui_blocks = cpu_to_fs64(sb, inode->i_blocks);
779 ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags);
780 ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation);
781
782 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
783 /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */
784 ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.u2_i_data[0];
785 } else if (inode->i_blocks) {
786 memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.u2_i_data,
787 sizeof(ufs_inode->ui_u2.ui_addr));
788 } else {
789 memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink,
790 sizeof(ufs_inode->ui_u2.ui_symlink));
791 }
792
793 if (!inode->i_nlink)
794 memset (ufs_inode, 0, sizeof(struct ufs2_inode));
795 UFSD("EXIT\n");
796}
797
798static int ufs_update_inode(struct inode * inode, int do_sync)
799{
800 struct super_block *sb = inode->i_sb;
801 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
802 struct buffer_head * bh;
803
804 UFSD("ENTER, ino %lu\n", inode->i_ino);
805
806 if (inode->i_ino < UFS_ROOTINO ||
807 inode->i_ino > (uspi->s_ncg * uspi->s_ipg)) {
808 ufs_warning (sb, "ufs_read_inode", "bad inode number (%lu)\n", inode->i_ino);
809 return -1;
810 }
811
812 bh = sb_bread(sb, ufs_inotofsba(inode->i_ino));
813 if (!bh) {
814 ufs_warning (sb, "ufs_read_inode", "unable to read inode %lu\n", inode->i_ino);
815 return -1;
816 }
817 if (uspi->fs_magic == UFS2_MAGIC) {
818 struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data;
819
820 ufs2_update_inode(inode,
821 ufs2_inode + ufs_inotofsbo(inode->i_ino));
822 } else {
823 struct ufs_inode *ufs_inode = (struct ufs_inode *) bh->b_data;
824
825 ufs1_update_inode(inode, ufs_inode + ufs_inotofsbo(inode->i_ino));
826 }
827
828 mark_buffer_dirty(bh);
829 if (do_sync)
830 sync_dirty_buffer(bh);
831 brelse (bh);
832
833 UFSD("EXIT\n");
834 return 0;
835}
836
837int ufs_write_inode(struct inode *inode, struct writeback_control *wbc)
838{
839 return ufs_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL);
840}
841
842int ufs_sync_inode (struct inode *inode)
843{
844 return ufs_update_inode (inode, 1);
845}
846
847void ufs_evict_inode(struct inode * inode)
848{
849 int want_delete = 0;
850
851 if (!inode->i_nlink && !is_bad_inode(inode))
852 want_delete = 1;
853
854 truncate_inode_pages_final(&inode->i_data);
855 if (want_delete) {
856 inode->i_size = 0;
857 if (inode->i_blocks &&
858 (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
859 S_ISLNK(inode->i_mode)))
860 ufs_truncate_blocks(inode);
861 ufs_update_inode(inode, inode_needs_sync(inode));
862 }
863
864 invalidate_inode_buffers(inode);
865 clear_inode(inode);
866
867 if (want_delete)
868 ufs_free_inode(inode);
869}
870
871struct to_free {
872 struct inode *inode;
873 u64 to;
874 unsigned count;
875};
876
877static inline void free_data(struct to_free *ctx, u64 from, unsigned count)
878{
879 if (ctx->count && ctx->to != from) {
880 ufs_free_blocks(ctx->inode, ctx->to - ctx->count, ctx->count);
881 ctx->count = 0;
882 }
883 ctx->count += count;
884 ctx->to = from + count;
885}
886
887#define DIRECT_FRAGMENT ((inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift)
888
889static void ufs_trunc_direct(struct inode *inode)
890{
891 struct ufs_inode_info *ufsi = UFS_I(inode);
892 struct super_block * sb;
893 struct ufs_sb_private_info * uspi;
894 void *p;
895 u64 frag1, frag2, frag3, frag4, block1, block2;
896 struct to_free ctx = {.inode = inode};
897 unsigned i, tmp;
898
899 UFSD("ENTER: ino %lu\n", inode->i_ino);
900
901 sb = inode->i_sb;
902 uspi = UFS_SB(sb)->s_uspi;
903
904 frag1 = DIRECT_FRAGMENT;
905 frag4 = min_t(u64, UFS_NDIR_FRAGMENT, ufsi->i_lastfrag);
906 frag2 = ((frag1 & uspi->s_fpbmask) ? ((frag1 | uspi->s_fpbmask) + 1) : frag1);
907 frag3 = frag4 & ~uspi->s_fpbmask;
908 block1 = block2 = 0;
909 if (frag2 > frag3) {
910 frag2 = frag4;
911 frag3 = frag4 = 0;
912 } else if (frag2 < frag3) {
913 block1 = ufs_fragstoblks (frag2);
914 block2 = ufs_fragstoblks (frag3);
915 }
916
917 UFSD("ino %lu, frag1 %llu, frag2 %llu, block1 %llu, block2 %llu,"
918 " frag3 %llu, frag4 %llu\n", inode->i_ino,
919 (unsigned long long)frag1, (unsigned long long)frag2,
920 (unsigned long long)block1, (unsigned long long)block2,
921 (unsigned long long)frag3, (unsigned long long)frag4);
922
923 if (frag1 >= frag2)
924 goto next1;
925
926 /*
927 * Free first free fragments
928 */
929 p = ufs_get_direct_data_ptr(uspi, ufsi, ufs_fragstoblks(frag1));
930 tmp = ufs_data_ptr_to_cpu(sb, p);
931 if (!tmp )
932 ufs_panic (sb, "ufs_trunc_direct", "internal error");
933 frag2 -= frag1;
934 frag1 = ufs_fragnum (frag1);
935
936 ufs_free_fragments(inode, tmp + frag1, frag2);
937
938next1:
939 /*
940 * Free whole blocks
941 */
942 for (i = block1 ; i < block2; i++) {
943 p = ufs_get_direct_data_ptr(uspi, ufsi, i);
944 tmp = ufs_data_ptr_to_cpu(sb, p);
945 if (!tmp)
946 continue;
947 write_seqlock(&ufsi->meta_lock);
948 ufs_data_ptr_clear(uspi, p);
949 write_sequnlock(&ufsi->meta_lock);
950
951 free_data(&ctx, tmp, uspi->s_fpb);
952 }
953
954 free_data(&ctx, 0, 0);
955
956 if (frag3 >= frag4)
957 goto next3;
958
959 /*
960 * Free last free fragments
961 */
962 p = ufs_get_direct_data_ptr(uspi, ufsi, ufs_fragstoblks(frag3));
963 tmp = ufs_data_ptr_to_cpu(sb, p);
964 if (!tmp )
965 ufs_panic(sb, "ufs_truncate_direct", "internal error");
966 frag4 = ufs_fragnum (frag4);
967 write_seqlock(&ufsi->meta_lock);
968 ufs_data_ptr_clear(uspi, p);
969 write_sequnlock(&ufsi->meta_lock);
970
971 ufs_free_fragments (inode, tmp, frag4);
972 next3:
973
974 UFSD("EXIT: ino %lu\n", inode->i_ino);
975}
976
977static void free_full_branch(struct inode *inode, u64 ind_block, int depth)
978{
979 struct super_block *sb = inode->i_sb;
980 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
981 struct ufs_buffer_head *ubh = ubh_bread(sb, ind_block, uspi->s_bsize);
982 unsigned i;
983
984 if (!ubh)
985 return;
986
987 if (--depth) {
988 for (i = 0; i < uspi->s_apb; i++) {
989 void *p = ubh_get_data_ptr(uspi, ubh, i);
990 u64 block = ufs_data_ptr_to_cpu(sb, p);
991 if (block)
992 free_full_branch(inode, block, depth);
993 }
994 } else {
995 struct to_free ctx = {.inode = inode};
996
997 for (i = 0; i < uspi->s_apb; i++) {
998 void *p = ubh_get_data_ptr(uspi, ubh, i);
999 u64 block = ufs_data_ptr_to_cpu(sb, p);
1000 if (block)
1001 free_data(&ctx, block, uspi->s_fpb);
1002 }
1003 free_data(&ctx, 0, 0);
1004 }
1005
1006 ubh_bforget(ubh);
1007 ufs_free_blocks(inode, ind_block, uspi->s_fpb);
1008}
1009
1010static void free_branch_tail(struct inode *inode, unsigned from, struct ufs_buffer_head *ubh, int depth)
1011{
1012 struct super_block *sb = inode->i_sb;
1013 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
1014 unsigned i;
1015
1016 if (--depth) {
1017 for (i = from; i < uspi->s_apb ; i++) {
1018 void *p = ubh_get_data_ptr(uspi, ubh, i);
1019 u64 block = ufs_data_ptr_to_cpu(sb, p);
1020 if (block) {
1021 write_seqlock(&UFS_I(inode)->meta_lock);
1022 ufs_data_ptr_clear(uspi, p);
1023 write_sequnlock(&UFS_I(inode)->meta_lock);
1024 ubh_mark_buffer_dirty(ubh);
1025 free_full_branch(inode, block, depth);
1026 }
1027 }
1028 } else {
1029 struct to_free ctx = {.inode = inode};
1030
1031 for (i = from; i < uspi->s_apb; i++) {
1032 void *p = ubh_get_data_ptr(uspi, ubh, i);
1033 u64 block = ufs_data_ptr_to_cpu(sb, p);
1034 if (block) {
1035 write_seqlock(&UFS_I(inode)->meta_lock);
1036 ufs_data_ptr_clear(uspi, p);
1037 write_sequnlock(&UFS_I(inode)->meta_lock);
1038 ubh_mark_buffer_dirty(ubh);
1039 free_data(&ctx, block, uspi->s_fpb);
1040 }
1041 }
1042 free_data(&ctx, 0, 0);
1043 }
1044 if (IS_SYNC(inode) && ubh_buffer_dirty(ubh))
1045 ubh_sync_block(ubh);
1046 ubh_brelse(ubh);
1047}
1048
1049static int ufs_alloc_lastblock(struct inode *inode, loff_t size)
1050{
1051 int err = 0;
1052 struct super_block *sb = inode->i_sb;
1053 struct address_space *mapping = inode->i_mapping;
1054 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
1055 unsigned i, end;
1056 sector_t lastfrag;
1057 struct page *lastpage;
1058 struct buffer_head *bh;
1059 u64 phys64;
1060
1061 lastfrag = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
1062
1063 if (!lastfrag)
1064 goto out;
1065
1066 lastfrag--;
1067
1068 lastpage = ufs_get_locked_page(mapping, lastfrag >>
1069 (PAGE_SHIFT - inode->i_blkbits));
1070 if (IS_ERR(lastpage)) {
1071 err = -EIO;
1072 goto out;
1073 }
1074
1075 end = lastfrag & ((1 << (PAGE_SHIFT - inode->i_blkbits)) - 1);
1076 bh = page_buffers(lastpage);
1077 for (i = 0; i < end; ++i)
1078 bh = bh->b_this_page;
1079
1080
1081 err = ufs_getfrag_block(inode, lastfrag, bh, 1);
1082
1083 if (unlikely(err))
1084 goto out_unlock;
1085
1086 if (buffer_new(bh)) {
1087 clear_buffer_new(bh);
1088 clean_bdev_bh_alias(bh);
1089 /*
1090 * we do not zeroize fragment, because of
1091 * if it maped to hole, it already contains zeroes
1092 */
1093 set_buffer_uptodate(bh);
1094 mark_buffer_dirty(bh);
1095 set_page_dirty(lastpage);
1096 }
1097
1098 if (lastfrag >= UFS_IND_FRAGMENT) {
1099 end = uspi->s_fpb - ufs_fragnum(lastfrag) - 1;
1100 phys64 = bh->b_blocknr + 1;
1101 for (i = 0; i < end; ++i) {
1102 bh = sb_getblk(sb, i + phys64);
1103 lock_buffer(bh);
1104 memset(bh->b_data, 0, sb->s_blocksize);
1105 set_buffer_uptodate(bh);
1106 mark_buffer_dirty(bh);
1107 unlock_buffer(bh);
1108 sync_dirty_buffer(bh);
1109 brelse(bh);
1110 }
1111 }
1112out_unlock:
1113 ufs_put_locked_page(lastpage);
1114out:
1115 return err;
1116}
1117
1118static void ufs_truncate_blocks(struct inode *inode)
1119{
1120 struct ufs_inode_info *ufsi = UFS_I(inode);
1121 struct super_block *sb = inode->i_sb;
1122 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
1123 unsigned offsets[4];
1124 int depth;
1125 int depth2;
1126 unsigned i;
1127 struct ufs_buffer_head *ubh[3];
1128 void *p;
1129 u64 block;
1130
1131 if (inode->i_size) {
1132 sector_t last = (inode->i_size - 1) >> uspi->s_bshift;
1133 depth = ufs_block_to_path(inode, last, offsets);
1134 if (!depth)
1135 return;
1136 } else {
1137 depth = 1;
1138 }
1139
1140 for (depth2 = depth - 1; depth2; depth2--)
1141 if (offsets[depth2] != uspi->s_apb - 1)
1142 break;
1143
1144 mutex_lock(&ufsi->truncate_mutex);
1145 if (depth == 1) {
1146 ufs_trunc_direct(inode);
1147 offsets[0] = UFS_IND_BLOCK;
1148 } else {
1149 /* get the blocks that should be partially emptied */
1150 p = ufs_get_direct_data_ptr(uspi, ufsi, offsets[0]++);
1151 for (i = 0; i < depth2; i++) {
1152 block = ufs_data_ptr_to_cpu(sb, p);
1153 if (!block)
1154 break;
1155 ubh[i] = ubh_bread(sb, block, uspi->s_bsize);
1156 if (!ubh[i]) {
1157 write_seqlock(&ufsi->meta_lock);
1158 ufs_data_ptr_clear(uspi, p);
1159 write_sequnlock(&ufsi->meta_lock);
1160 break;
1161 }
1162 p = ubh_get_data_ptr(uspi, ubh[i], offsets[i + 1]++);
1163 }
1164 while (i--)
1165 free_branch_tail(inode, offsets[i + 1], ubh[i], depth - i - 1);
1166 }
1167 for (i = offsets[0]; i <= UFS_TIND_BLOCK; i++) {
1168 p = ufs_get_direct_data_ptr(uspi, ufsi, i);
1169 block = ufs_data_ptr_to_cpu(sb, p);
1170 if (block) {
1171 write_seqlock(&ufsi->meta_lock);
1172 ufs_data_ptr_clear(uspi, p);
1173 write_sequnlock(&ufsi->meta_lock);
1174 free_full_branch(inode, block, i - UFS_IND_BLOCK + 1);
1175 }
1176 }
1177 read_seqlock_excl(&ufsi->meta_lock);
1178 ufsi->i_lastfrag = DIRECT_FRAGMENT;
1179 read_sequnlock_excl(&ufsi->meta_lock);
1180 mark_inode_dirty(inode);
1181 mutex_unlock(&ufsi->truncate_mutex);
1182}
1183
1184static int ufs_truncate(struct inode *inode, loff_t size)
1185{
1186 int err = 0;
1187
1188 UFSD("ENTER: ino %lu, i_size: %llu, old_i_size: %llu\n",
1189 inode->i_ino, (unsigned long long)size,
1190 (unsigned long long)i_size_read(inode));
1191
1192 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
1193 S_ISLNK(inode->i_mode)))
1194 return -EINVAL;
1195 if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
1196 return -EPERM;
1197
1198 err = ufs_alloc_lastblock(inode, size);
1199
1200 if (err)
1201 goto out;
1202
1203 block_truncate_page(inode->i_mapping, size, ufs_getfrag_block);
1204
1205 truncate_setsize(inode, size);
1206
1207 ufs_truncate_blocks(inode);
1208 inode->i_mtime = inode->i_ctime = current_time(inode);
1209 mark_inode_dirty(inode);
1210out:
1211 UFSD("EXIT: err %d\n", err);
1212 return err;
1213}
1214
1215int ufs_setattr(struct user_namespace *mnt_userns, struct dentry *dentry,
1216 struct iattr *attr)
1217{
1218 struct inode *inode = d_inode(dentry);
1219 unsigned int ia_valid = attr->ia_valid;
1220 int error;
1221
1222 error = setattr_prepare(&init_user_ns, dentry, attr);
1223 if (error)
1224 return error;
1225
1226 if (ia_valid & ATTR_SIZE && attr->ia_size != inode->i_size) {
1227 error = ufs_truncate(inode, attr->ia_size);
1228 if (error)
1229 return error;
1230 }
1231
1232 setattr_copy(&init_user_ns, inode, attr);
1233 mark_inode_dirty(inode);
1234 return 0;
1235}
1236
1237const struct inode_operations ufs_file_inode_operations = {
1238 .setattr = ufs_setattr,
1239};
1/*
2 * linux/fs/ufs/inode.c
3 *
4 * Copyright (C) 1998
5 * Daniel Pirkl <daniel.pirkl@email.cz>
6 * Charles University, Faculty of Mathematics and Physics
7 *
8 * from
9 *
10 * linux/fs/ext2/inode.c
11 *
12 * Copyright (C) 1992, 1993, 1994, 1995
13 * Remy Card (card@masi.ibp.fr)
14 * Laboratoire MASI - Institut Blaise Pascal
15 * Universite Pierre et Marie Curie (Paris VI)
16 *
17 * from
18 *
19 * linux/fs/minix/inode.c
20 *
21 * Copyright (C) 1991, 1992 Linus Torvalds
22 *
23 * Goal-directed block allocation by Stephen Tweedie (sct@dcs.ed.ac.uk), 1993
24 * Big-endian to little-endian byte-swapping/bitmaps by
25 * David S. Miller (davem@caip.rutgers.edu), 1995
26 */
27
28#include <asm/uaccess.h>
29
30#include <linux/errno.h>
31#include <linux/fs.h>
32#include <linux/time.h>
33#include <linux/stat.h>
34#include <linux/string.h>
35#include <linux/mm.h>
36#include <linux/buffer_head.h>
37#include <linux/writeback.h>
38
39#include "ufs_fs.h"
40#include "ufs.h"
41#include "swab.h"
42#include "util.h"
43
44static u64 ufs_frag_map(struct inode *inode, sector_t frag, bool needs_lock);
45
46static int ufs_block_to_path(struct inode *inode, sector_t i_block, sector_t offsets[4])
47{
48 struct ufs_sb_private_info *uspi = UFS_SB(inode->i_sb)->s_uspi;
49 int ptrs = uspi->s_apb;
50 int ptrs_bits = uspi->s_apbshift;
51 const long direct_blocks = UFS_NDADDR,
52 indirect_blocks = ptrs,
53 double_blocks = (1 << (ptrs_bits * 2));
54 int n = 0;
55
56
57 UFSD("ptrs=uspi->s_apb = %d,double_blocks=%ld \n",ptrs,double_blocks);
58 if (i_block < direct_blocks) {
59 offsets[n++] = i_block;
60 } else if ((i_block -= direct_blocks) < indirect_blocks) {
61 offsets[n++] = UFS_IND_BLOCK;
62 offsets[n++] = i_block;
63 } else if ((i_block -= indirect_blocks) < double_blocks) {
64 offsets[n++] = UFS_DIND_BLOCK;
65 offsets[n++] = i_block >> ptrs_bits;
66 offsets[n++] = i_block & (ptrs - 1);
67 } else if (((i_block -= double_blocks) >> (ptrs_bits * 2)) < ptrs) {
68 offsets[n++] = UFS_TIND_BLOCK;
69 offsets[n++] = i_block >> (ptrs_bits * 2);
70 offsets[n++] = (i_block >> ptrs_bits) & (ptrs - 1);
71 offsets[n++] = i_block & (ptrs - 1);
72 } else {
73 ufs_warning(inode->i_sb, "ufs_block_to_path", "block > big");
74 }
75 return n;
76}
77
78/*
79 * Returns the location of the fragment from
80 * the beginning of the filesystem.
81 */
82
83static u64 ufs_frag_map(struct inode *inode, sector_t frag, bool needs_lock)
84{
85 struct ufs_inode_info *ufsi = UFS_I(inode);
86 struct super_block *sb = inode->i_sb;
87 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
88 u64 mask = (u64) uspi->s_apbmask>>uspi->s_fpbshift;
89 int shift = uspi->s_apbshift-uspi->s_fpbshift;
90 sector_t offsets[4], *p;
91 int depth = ufs_block_to_path(inode, frag >> uspi->s_fpbshift, offsets);
92 u64 ret = 0L;
93 __fs32 block;
94 __fs64 u2_block = 0L;
95 unsigned flags = UFS_SB(sb)->s_flags;
96 u64 temp = 0L;
97
98 UFSD(": frag = %llu depth = %d\n", (unsigned long long)frag, depth);
99 UFSD(": uspi->s_fpbshift = %d ,uspi->s_apbmask = %x, mask=%llx\n",
100 uspi->s_fpbshift, uspi->s_apbmask,
101 (unsigned long long)mask);
102
103 if (depth == 0)
104 return 0;
105
106 p = offsets;
107
108 if (needs_lock)
109 lock_ufs(sb);
110 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
111 goto ufs2;
112
113 block = ufsi->i_u1.i_data[*p++];
114 if (!block)
115 goto out;
116 while (--depth) {
117 struct buffer_head *bh;
118 sector_t n = *p++;
119
120 bh = sb_bread(sb, uspi->s_sbbase + fs32_to_cpu(sb, block)+(n>>shift));
121 if (!bh)
122 goto out;
123 block = ((__fs32 *) bh->b_data)[n & mask];
124 brelse (bh);
125 if (!block)
126 goto out;
127 }
128 ret = (u64) (uspi->s_sbbase + fs32_to_cpu(sb, block) + (frag & uspi->s_fpbmask));
129 goto out;
130ufs2:
131 u2_block = ufsi->i_u1.u2_i_data[*p++];
132 if (!u2_block)
133 goto out;
134
135
136 while (--depth) {
137 struct buffer_head *bh;
138 sector_t n = *p++;
139
140
141 temp = (u64)(uspi->s_sbbase) + fs64_to_cpu(sb, u2_block);
142 bh = sb_bread(sb, temp +(u64) (n>>shift));
143 if (!bh)
144 goto out;
145 u2_block = ((__fs64 *)bh->b_data)[n & mask];
146 brelse(bh);
147 if (!u2_block)
148 goto out;
149 }
150 temp = (u64)uspi->s_sbbase + fs64_to_cpu(sb, u2_block);
151 ret = temp + (u64) (frag & uspi->s_fpbmask);
152
153out:
154 if (needs_lock)
155 unlock_ufs(sb);
156 return ret;
157}
158
159/**
160 * ufs_inode_getfrag() - allocate new fragment(s)
161 * @inode - pointer to inode
162 * @fragment - number of `fragment' which hold pointer
163 * to new allocated fragment(s)
164 * @new_fragment - number of new allocated fragment(s)
165 * @required - how many fragment(s) we require
166 * @err - we set it if something wrong
167 * @phys - pointer to where we save physical number of new allocated fragments,
168 * NULL if we allocate not data(indirect blocks for example).
169 * @new - we set it if we allocate new block
170 * @locked_page - for ufs_new_fragments()
171 */
172static struct buffer_head *
173ufs_inode_getfrag(struct inode *inode, u64 fragment,
174 sector_t new_fragment, unsigned int required, int *err,
175 long *phys, int *new, struct page *locked_page)
176{
177 struct ufs_inode_info *ufsi = UFS_I(inode);
178 struct super_block *sb = inode->i_sb;
179 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
180 struct buffer_head * result;
181 unsigned blockoff, lastblockoff;
182 u64 tmp, goal, lastfrag, block, lastblock;
183 void *p, *p2;
184
185 UFSD("ENTER, ino %lu, fragment %llu, new_fragment %llu, required %u, "
186 "metadata %d\n", inode->i_ino, (unsigned long long)fragment,
187 (unsigned long long)new_fragment, required, !phys);
188
189 /* TODO : to be done for write support
190 if ( (flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
191 goto ufs2;
192 */
193
194 block = ufs_fragstoblks (fragment);
195 blockoff = ufs_fragnum (fragment);
196 p = ufs_get_direct_data_ptr(uspi, ufsi, block);
197
198 goal = 0;
199
200repeat:
201 tmp = ufs_data_ptr_to_cpu(sb, p);
202
203 lastfrag = ufsi->i_lastfrag;
204 if (tmp && fragment < lastfrag) {
205 if (!phys) {
206 result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff);
207 if (tmp == ufs_data_ptr_to_cpu(sb, p)) {
208 UFSD("EXIT, result %llu\n",
209 (unsigned long long)tmp + blockoff);
210 return result;
211 }
212 brelse (result);
213 goto repeat;
214 } else {
215 *phys = uspi->s_sbbase + tmp + blockoff;
216 return NULL;
217 }
218 }
219
220 lastblock = ufs_fragstoblks (lastfrag);
221 lastblockoff = ufs_fragnum (lastfrag);
222 /*
223 * We will extend file into new block beyond last allocated block
224 */
225 if (lastblock < block) {
226 /*
227 * We must reallocate last allocated block
228 */
229 if (lastblockoff) {
230 p2 = ufs_get_direct_data_ptr(uspi, ufsi, lastblock);
231 tmp = ufs_new_fragments(inode, p2, lastfrag,
232 ufs_data_ptr_to_cpu(sb, p2),
233 uspi->s_fpb - lastblockoff,
234 err, locked_page);
235 if (!tmp) {
236 if (lastfrag != ufsi->i_lastfrag)
237 goto repeat;
238 else
239 return NULL;
240 }
241 lastfrag = ufsi->i_lastfrag;
242
243 }
244 tmp = ufs_data_ptr_to_cpu(sb,
245 ufs_get_direct_data_ptr(uspi, ufsi,
246 lastblock));
247 if (tmp)
248 goal = tmp + uspi->s_fpb;
249 tmp = ufs_new_fragments (inode, p, fragment - blockoff,
250 goal, required + blockoff,
251 err,
252 phys != NULL ? locked_page : NULL);
253 } else if (lastblock == block) {
254 /*
255 * We will extend last allocated block
256 */
257 tmp = ufs_new_fragments(inode, p, fragment -
258 (blockoff - lastblockoff),
259 ufs_data_ptr_to_cpu(sb, p),
260 required + (blockoff - lastblockoff),
261 err, phys != NULL ? locked_page : NULL);
262 } else /* (lastblock > block) */ {
263 /*
264 * We will allocate new block before last allocated block
265 */
266 if (block) {
267 tmp = ufs_data_ptr_to_cpu(sb,
268 ufs_get_direct_data_ptr(uspi, ufsi, block - 1));
269 if (tmp)
270 goal = tmp + uspi->s_fpb;
271 }
272 tmp = ufs_new_fragments(inode, p, fragment - blockoff,
273 goal, uspi->s_fpb, err,
274 phys != NULL ? locked_page : NULL);
275 }
276 if (!tmp) {
277 if ((!blockoff && ufs_data_ptr_to_cpu(sb, p)) ||
278 (blockoff && lastfrag != ufsi->i_lastfrag))
279 goto repeat;
280 *err = -ENOSPC;
281 return NULL;
282 }
283
284 if (!phys) {
285 result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff);
286 } else {
287 *phys = uspi->s_sbbase + tmp + blockoff;
288 result = NULL;
289 *err = 0;
290 *new = 1;
291 }
292
293 inode->i_ctime = CURRENT_TIME_SEC;
294 if (IS_SYNC(inode))
295 ufs_sync_inode (inode);
296 mark_inode_dirty(inode);
297 UFSD("EXIT, result %llu\n", (unsigned long long)tmp + blockoff);
298 return result;
299
300 /* This part : To be implemented ....
301 Required only for writing, not required for READ-ONLY.
302ufs2:
303
304 u2_block = ufs_fragstoblks(fragment);
305 u2_blockoff = ufs_fragnum(fragment);
306 p = ufsi->i_u1.u2_i_data + block;
307 goal = 0;
308
309repeat2:
310 tmp = fs32_to_cpu(sb, *p);
311 lastfrag = ufsi->i_lastfrag;
312
313 */
314}
315
316/**
317 * ufs_inode_getblock() - allocate new block
318 * @inode - pointer to inode
319 * @bh - pointer to block which hold "pointer" to new allocated block
320 * @fragment - number of `fragment' which hold pointer
321 * to new allocated block
322 * @new_fragment - number of new allocated fragment
323 * (block will hold this fragment and also uspi->s_fpb-1)
324 * @err - see ufs_inode_getfrag()
325 * @phys - see ufs_inode_getfrag()
326 * @new - see ufs_inode_getfrag()
327 * @locked_page - see ufs_inode_getfrag()
328 */
329static struct buffer_head *
330ufs_inode_getblock(struct inode *inode, struct buffer_head *bh,
331 u64 fragment, sector_t new_fragment, int *err,
332 long *phys, int *new, struct page *locked_page)
333{
334 struct super_block *sb = inode->i_sb;
335 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
336 struct buffer_head * result;
337 unsigned blockoff;
338 u64 tmp, goal, block;
339 void *p;
340
341 block = ufs_fragstoblks (fragment);
342 blockoff = ufs_fragnum (fragment);
343
344 UFSD("ENTER, ino %lu, fragment %llu, new_fragment %llu, metadata %d\n",
345 inode->i_ino, (unsigned long long)fragment,
346 (unsigned long long)new_fragment, !phys);
347
348 result = NULL;
349 if (!bh)
350 goto out;
351 if (!buffer_uptodate(bh)) {
352 ll_rw_block (READ, 1, &bh);
353 wait_on_buffer (bh);
354 if (!buffer_uptodate(bh))
355 goto out;
356 }
357 if (uspi->fs_magic == UFS2_MAGIC)
358 p = (__fs64 *)bh->b_data + block;
359 else
360 p = (__fs32 *)bh->b_data + block;
361repeat:
362 tmp = ufs_data_ptr_to_cpu(sb, p);
363 if (tmp) {
364 if (!phys) {
365 result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff);
366 if (tmp == ufs_data_ptr_to_cpu(sb, p))
367 goto out;
368 brelse (result);
369 goto repeat;
370 } else {
371 *phys = uspi->s_sbbase + tmp + blockoff;
372 goto out;
373 }
374 }
375
376 if (block && (uspi->fs_magic == UFS2_MAGIC ?
377 (tmp = fs64_to_cpu(sb, ((__fs64 *)bh->b_data)[block-1])) :
378 (tmp = fs32_to_cpu(sb, ((__fs32 *)bh->b_data)[block-1]))))
379 goal = tmp + uspi->s_fpb;
380 else
381 goal = bh->b_blocknr + uspi->s_fpb;
382 tmp = ufs_new_fragments(inode, p, ufs_blknum(new_fragment), goal,
383 uspi->s_fpb, err, locked_page);
384 if (!tmp) {
385 if (ufs_data_ptr_to_cpu(sb, p))
386 goto repeat;
387 goto out;
388 }
389
390
391 if (!phys) {
392 result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff);
393 } else {
394 *phys = uspi->s_sbbase + tmp + blockoff;
395 *new = 1;
396 }
397
398 mark_buffer_dirty(bh);
399 if (IS_SYNC(inode))
400 sync_dirty_buffer(bh);
401 inode->i_ctime = CURRENT_TIME_SEC;
402 mark_inode_dirty(inode);
403 UFSD("result %llu\n", (unsigned long long)tmp + blockoff);
404out:
405 brelse (bh);
406 UFSD("EXIT\n");
407 return result;
408}
409
410/**
411 * ufs_getfrag_block() - `get_block_t' function, interface between UFS and
412 * readpage, writepage and so on
413 */
414
415int ufs_getfrag_block(struct inode *inode, sector_t fragment, struct buffer_head *bh_result, int create)
416{
417 struct super_block * sb = inode->i_sb;
418 struct ufs_sb_info * sbi = UFS_SB(sb);
419 struct ufs_sb_private_info * uspi = sbi->s_uspi;
420 struct buffer_head * bh;
421 int ret, err, new;
422 unsigned long ptr,phys;
423 u64 phys64 = 0;
424 bool needs_lock = (sbi->mutex_owner != current);
425
426 if (!create) {
427 phys64 = ufs_frag_map(inode, fragment, needs_lock);
428 UFSD("phys64 = %llu\n", (unsigned long long)phys64);
429 if (phys64)
430 map_bh(bh_result, sb, phys64);
431 return 0;
432 }
433
434 /* This code entered only while writing ....? */
435
436 err = -EIO;
437 new = 0;
438 ret = 0;
439 bh = NULL;
440
441 if (needs_lock)
442 lock_ufs(sb);
443
444 UFSD("ENTER, ino %lu, fragment %llu\n", inode->i_ino, (unsigned long long)fragment);
445 if (fragment >
446 ((UFS_NDADDR + uspi->s_apb + uspi->s_2apb + uspi->s_3apb)
447 << uspi->s_fpbshift))
448 goto abort_too_big;
449
450 err = 0;
451 ptr = fragment;
452
453 /*
454 * ok, these macros clean the logic up a bit and make
455 * it much more readable:
456 */
457#define GET_INODE_DATABLOCK(x) \
458 ufs_inode_getfrag(inode, x, fragment, 1, &err, &phys, &new,\
459 bh_result->b_page)
460#define GET_INODE_PTR(x) \
461 ufs_inode_getfrag(inode, x, fragment, uspi->s_fpb, &err, NULL, NULL,\
462 bh_result->b_page)
463#define GET_INDIRECT_DATABLOCK(x) \
464 ufs_inode_getblock(inode, bh, x, fragment, \
465 &err, &phys, &new, bh_result->b_page)
466#define GET_INDIRECT_PTR(x) \
467 ufs_inode_getblock(inode, bh, x, fragment, \
468 &err, NULL, NULL, NULL)
469
470 if (ptr < UFS_NDIR_FRAGMENT) {
471 bh = GET_INODE_DATABLOCK(ptr);
472 goto out;
473 }
474 ptr -= UFS_NDIR_FRAGMENT;
475 if (ptr < (1 << (uspi->s_apbshift + uspi->s_fpbshift))) {
476 bh = GET_INODE_PTR(UFS_IND_FRAGMENT + (ptr >> uspi->s_apbshift));
477 goto get_indirect;
478 }
479 ptr -= 1 << (uspi->s_apbshift + uspi->s_fpbshift);
480 if (ptr < (1 << (uspi->s_2apbshift + uspi->s_fpbshift))) {
481 bh = GET_INODE_PTR(UFS_DIND_FRAGMENT + (ptr >> uspi->s_2apbshift));
482 goto get_double;
483 }
484 ptr -= 1 << (uspi->s_2apbshift + uspi->s_fpbshift);
485 bh = GET_INODE_PTR(UFS_TIND_FRAGMENT + (ptr >> uspi->s_3apbshift));
486 bh = GET_INDIRECT_PTR((ptr >> uspi->s_2apbshift) & uspi->s_apbmask);
487get_double:
488 bh = GET_INDIRECT_PTR((ptr >> uspi->s_apbshift) & uspi->s_apbmask);
489get_indirect:
490 bh = GET_INDIRECT_DATABLOCK(ptr & uspi->s_apbmask);
491
492#undef GET_INODE_DATABLOCK
493#undef GET_INODE_PTR
494#undef GET_INDIRECT_DATABLOCK
495#undef GET_INDIRECT_PTR
496
497out:
498 if (err)
499 goto abort;
500 if (new)
501 set_buffer_new(bh_result);
502 map_bh(bh_result, sb, phys);
503abort:
504 if (needs_lock)
505 unlock_ufs(sb);
506
507 return err;
508
509abort_too_big:
510 ufs_warning(sb, "ufs_get_block", "block > big");
511 goto abort;
512}
513
514static int ufs_writepage(struct page *page, struct writeback_control *wbc)
515{
516 return block_write_full_page(page,ufs_getfrag_block,wbc);
517}
518
519static int ufs_readpage(struct file *file, struct page *page)
520{
521 return block_read_full_page(page,ufs_getfrag_block);
522}
523
524int ufs_prepare_chunk(struct page *page, loff_t pos, unsigned len)
525{
526 return __block_write_begin(page, pos, len, ufs_getfrag_block);
527}
528
529static void ufs_write_failed(struct address_space *mapping, loff_t to)
530{
531 struct inode *inode = mapping->host;
532
533 if (to > inode->i_size)
534 truncate_pagecache(inode, inode->i_size);
535}
536
537static int ufs_write_begin(struct file *file, struct address_space *mapping,
538 loff_t pos, unsigned len, unsigned flags,
539 struct page **pagep, void **fsdata)
540{
541 int ret;
542
543 ret = block_write_begin(mapping, pos, len, flags, pagep,
544 ufs_getfrag_block);
545 if (unlikely(ret))
546 ufs_write_failed(mapping, pos + len);
547
548 return ret;
549}
550
551static sector_t ufs_bmap(struct address_space *mapping, sector_t block)
552{
553 return generic_block_bmap(mapping,block,ufs_getfrag_block);
554}
555
556const struct address_space_operations ufs_aops = {
557 .readpage = ufs_readpage,
558 .writepage = ufs_writepage,
559 .write_begin = ufs_write_begin,
560 .write_end = generic_write_end,
561 .bmap = ufs_bmap
562};
563
564static void ufs_set_inode_ops(struct inode *inode)
565{
566 if (S_ISREG(inode->i_mode)) {
567 inode->i_op = &ufs_file_inode_operations;
568 inode->i_fop = &ufs_file_operations;
569 inode->i_mapping->a_ops = &ufs_aops;
570 } else if (S_ISDIR(inode->i_mode)) {
571 inode->i_op = &ufs_dir_inode_operations;
572 inode->i_fop = &ufs_dir_operations;
573 inode->i_mapping->a_ops = &ufs_aops;
574 } else if (S_ISLNK(inode->i_mode)) {
575 if (!inode->i_blocks)
576 inode->i_op = &ufs_fast_symlink_inode_operations;
577 else {
578 inode->i_op = &ufs_symlink_inode_operations;
579 inode->i_mapping->a_ops = &ufs_aops;
580 }
581 } else
582 init_special_inode(inode, inode->i_mode,
583 ufs_get_inode_dev(inode->i_sb, UFS_I(inode)));
584}
585
586static int ufs1_read_inode(struct inode *inode, struct ufs_inode *ufs_inode)
587{
588 struct ufs_inode_info *ufsi = UFS_I(inode);
589 struct super_block *sb = inode->i_sb;
590 umode_t mode;
591
592 /*
593 * Copy data to the in-core inode.
594 */
595 inode->i_mode = mode = fs16_to_cpu(sb, ufs_inode->ui_mode);
596 set_nlink(inode, fs16_to_cpu(sb, ufs_inode->ui_nlink));
597 if (inode->i_nlink == 0) {
598 ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino);
599 return -1;
600 }
601
602 /*
603 * Linux now has 32-bit uid and gid, so we can support EFT.
604 */
605 i_uid_write(inode, ufs_get_inode_uid(sb, ufs_inode));
606 i_gid_write(inode, ufs_get_inode_gid(sb, ufs_inode));
607
608 inode->i_size = fs64_to_cpu(sb, ufs_inode->ui_size);
609 inode->i_atime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_atime.tv_sec);
610 inode->i_ctime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_ctime.tv_sec);
611 inode->i_mtime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_mtime.tv_sec);
612 inode->i_mtime.tv_nsec = 0;
613 inode->i_atime.tv_nsec = 0;
614 inode->i_ctime.tv_nsec = 0;
615 inode->i_blocks = fs32_to_cpu(sb, ufs_inode->ui_blocks);
616 inode->i_generation = fs32_to_cpu(sb, ufs_inode->ui_gen);
617 ufsi->i_flags = fs32_to_cpu(sb, ufs_inode->ui_flags);
618 ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow);
619 ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag);
620
621
622 if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) {
623 memcpy(ufsi->i_u1.i_data, &ufs_inode->ui_u2.ui_addr,
624 sizeof(ufs_inode->ui_u2.ui_addr));
625 } else {
626 memcpy(ufsi->i_u1.i_symlink, ufs_inode->ui_u2.ui_symlink,
627 sizeof(ufs_inode->ui_u2.ui_symlink) - 1);
628 ufsi->i_u1.i_symlink[sizeof(ufs_inode->ui_u2.ui_symlink) - 1] = 0;
629 }
630 return 0;
631}
632
633static int ufs2_read_inode(struct inode *inode, struct ufs2_inode *ufs2_inode)
634{
635 struct ufs_inode_info *ufsi = UFS_I(inode);
636 struct super_block *sb = inode->i_sb;
637 umode_t mode;
638
639 UFSD("Reading ufs2 inode, ino %lu\n", inode->i_ino);
640 /*
641 * Copy data to the in-core inode.
642 */
643 inode->i_mode = mode = fs16_to_cpu(sb, ufs2_inode->ui_mode);
644 set_nlink(inode, fs16_to_cpu(sb, ufs2_inode->ui_nlink));
645 if (inode->i_nlink == 0) {
646 ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino);
647 return -1;
648 }
649
650 /*
651 * Linux now has 32-bit uid and gid, so we can support EFT.
652 */
653 i_uid_write(inode, fs32_to_cpu(sb, ufs2_inode->ui_uid));
654 i_gid_write(inode, fs32_to_cpu(sb, ufs2_inode->ui_gid));
655
656 inode->i_size = fs64_to_cpu(sb, ufs2_inode->ui_size);
657 inode->i_atime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_atime);
658 inode->i_ctime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_ctime);
659 inode->i_mtime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_mtime);
660 inode->i_atime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_atimensec);
661 inode->i_ctime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_ctimensec);
662 inode->i_mtime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_mtimensec);
663 inode->i_blocks = fs64_to_cpu(sb, ufs2_inode->ui_blocks);
664 inode->i_generation = fs32_to_cpu(sb, ufs2_inode->ui_gen);
665 ufsi->i_flags = fs32_to_cpu(sb, ufs2_inode->ui_flags);
666 /*
667 ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow);
668 ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag);
669 */
670
671 if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) {
672 memcpy(ufsi->i_u1.u2_i_data, &ufs2_inode->ui_u2.ui_addr,
673 sizeof(ufs2_inode->ui_u2.ui_addr));
674 } else {
675 memcpy(ufsi->i_u1.i_symlink, ufs2_inode->ui_u2.ui_symlink,
676 sizeof(ufs2_inode->ui_u2.ui_symlink) - 1);
677 ufsi->i_u1.i_symlink[sizeof(ufs2_inode->ui_u2.ui_symlink) - 1] = 0;
678 }
679 return 0;
680}
681
682struct inode *ufs_iget(struct super_block *sb, unsigned long ino)
683{
684 struct ufs_inode_info *ufsi;
685 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
686 struct buffer_head * bh;
687 struct inode *inode;
688 int err;
689
690 UFSD("ENTER, ino %lu\n", ino);
691
692 if (ino < UFS_ROOTINO || ino > (uspi->s_ncg * uspi->s_ipg)) {
693 ufs_warning(sb, "ufs_read_inode", "bad inode number (%lu)\n",
694 ino);
695 return ERR_PTR(-EIO);
696 }
697
698 inode = iget_locked(sb, ino);
699 if (!inode)
700 return ERR_PTR(-ENOMEM);
701 if (!(inode->i_state & I_NEW))
702 return inode;
703
704 ufsi = UFS_I(inode);
705
706 bh = sb_bread(sb, uspi->s_sbbase + ufs_inotofsba(inode->i_ino));
707 if (!bh) {
708 ufs_warning(sb, "ufs_read_inode", "unable to read inode %lu\n",
709 inode->i_ino);
710 goto bad_inode;
711 }
712 if ((UFS_SB(sb)->s_flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
713 struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data;
714
715 err = ufs2_read_inode(inode,
716 ufs2_inode + ufs_inotofsbo(inode->i_ino));
717 } else {
718 struct ufs_inode *ufs_inode = (struct ufs_inode *)bh->b_data;
719
720 err = ufs1_read_inode(inode,
721 ufs_inode + ufs_inotofsbo(inode->i_ino));
722 }
723
724 if (err)
725 goto bad_inode;
726 inode->i_version++;
727 ufsi->i_lastfrag =
728 (inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift;
729 ufsi->i_dir_start_lookup = 0;
730 ufsi->i_osync = 0;
731
732 ufs_set_inode_ops(inode);
733
734 brelse(bh);
735
736 UFSD("EXIT\n");
737 unlock_new_inode(inode);
738 return inode;
739
740bad_inode:
741 iget_failed(inode);
742 return ERR_PTR(-EIO);
743}
744
745static void ufs1_update_inode(struct inode *inode, struct ufs_inode *ufs_inode)
746{
747 struct super_block *sb = inode->i_sb;
748 struct ufs_inode_info *ufsi = UFS_I(inode);
749
750 ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode);
751 ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink);
752
753 ufs_set_inode_uid(sb, ufs_inode, i_uid_read(inode));
754 ufs_set_inode_gid(sb, ufs_inode, i_gid_read(inode));
755
756 ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size);
757 ufs_inode->ui_atime.tv_sec = cpu_to_fs32(sb, inode->i_atime.tv_sec);
758 ufs_inode->ui_atime.tv_usec = 0;
759 ufs_inode->ui_ctime.tv_sec = cpu_to_fs32(sb, inode->i_ctime.tv_sec);
760 ufs_inode->ui_ctime.tv_usec = 0;
761 ufs_inode->ui_mtime.tv_sec = cpu_to_fs32(sb, inode->i_mtime.tv_sec);
762 ufs_inode->ui_mtime.tv_usec = 0;
763 ufs_inode->ui_blocks = cpu_to_fs32(sb, inode->i_blocks);
764 ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags);
765 ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation);
766
767 if ((UFS_SB(sb)->s_flags & UFS_UID_MASK) == UFS_UID_EFT) {
768 ufs_inode->ui_u3.ui_sun.ui_shadow = cpu_to_fs32(sb, ufsi->i_shadow);
769 ufs_inode->ui_u3.ui_sun.ui_oeftflag = cpu_to_fs32(sb, ufsi->i_oeftflag);
770 }
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.i_data[0];
775 } else if (inode->i_blocks) {
776 memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.i_data,
777 sizeof(ufs_inode->ui_u2.ui_addr));
778 }
779 else {
780 memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink,
781 sizeof(ufs_inode->ui_u2.ui_symlink));
782 }
783
784 if (!inode->i_nlink)
785 memset (ufs_inode, 0, sizeof(struct ufs_inode));
786}
787
788static void ufs2_update_inode(struct inode *inode, struct ufs2_inode *ufs_inode)
789{
790 struct super_block *sb = inode->i_sb;
791 struct ufs_inode_info *ufsi = UFS_I(inode);
792
793 UFSD("ENTER\n");
794 ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode);
795 ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink);
796
797 ufs_inode->ui_uid = cpu_to_fs32(sb, i_uid_read(inode));
798 ufs_inode->ui_gid = cpu_to_fs32(sb, i_gid_read(inode));
799
800 ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size);
801 ufs_inode->ui_atime = cpu_to_fs64(sb, inode->i_atime.tv_sec);
802 ufs_inode->ui_atimensec = cpu_to_fs32(sb, inode->i_atime.tv_nsec);
803 ufs_inode->ui_ctime = cpu_to_fs64(sb, inode->i_ctime.tv_sec);
804 ufs_inode->ui_ctimensec = cpu_to_fs32(sb, inode->i_ctime.tv_nsec);
805 ufs_inode->ui_mtime = cpu_to_fs64(sb, inode->i_mtime.tv_sec);
806 ufs_inode->ui_mtimensec = cpu_to_fs32(sb, inode->i_mtime.tv_nsec);
807
808 ufs_inode->ui_blocks = cpu_to_fs64(sb, inode->i_blocks);
809 ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags);
810 ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation);
811
812 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
813 /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */
814 ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.u2_i_data[0];
815 } else if (inode->i_blocks) {
816 memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.u2_i_data,
817 sizeof(ufs_inode->ui_u2.ui_addr));
818 } else {
819 memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink,
820 sizeof(ufs_inode->ui_u2.ui_symlink));
821 }
822
823 if (!inode->i_nlink)
824 memset (ufs_inode, 0, sizeof(struct ufs2_inode));
825 UFSD("EXIT\n");
826}
827
828static int ufs_update_inode(struct inode * inode, int do_sync)
829{
830 struct super_block *sb = inode->i_sb;
831 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
832 struct buffer_head * bh;
833
834 UFSD("ENTER, ino %lu\n", inode->i_ino);
835
836 if (inode->i_ino < UFS_ROOTINO ||
837 inode->i_ino > (uspi->s_ncg * uspi->s_ipg)) {
838 ufs_warning (sb, "ufs_read_inode", "bad inode number (%lu)\n", inode->i_ino);
839 return -1;
840 }
841
842 bh = sb_bread(sb, ufs_inotofsba(inode->i_ino));
843 if (!bh) {
844 ufs_warning (sb, "ufs_read_inode", "unable to read inode %lu\n", inode->i_ino);
845 return -1;
846 }
847 if (uspi->fs_magic == UFS2_MAGIC) {
848 struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data;
849
850 ufs2_update_inode(inode,
851 ufs2_inode + ufs_inotofsbo(inode->i_ino));
852 } else {
853 struct ufs_inode *ufs_inode = (struct ufs_inode *) bh->b_data;
854
855 ufs1_update_inode(inode, ufs_inode + ufs_inotofsbo(inode->i_ino));
856 }
857
858 mark_buffer_dirty(bh);
859 if (do_sync)
860 sync_dirty_buffer(bh);
861 brelse (bh);
862
863 UFSD("EXIT\n");
864 return 0;
865}
866
867int ufs_write_inode(struct inode *inode, struct writeback_control *wbc)
868{
869 int ret;
870 lock_ufs(inode->i_sb);
871 ret = ufs_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL);
872 unlock_ufs(inode->i_sb);
873 return ret;
874}
875
876int ufs_sync_inode (struct inode *inode)
877{
878 return ufs_update_inode (inode, 1);
879}
880
881void ufs_evict_inode(struct inode * inode)
882{
883 int want_delete = 0;
884
885 if (!inode->i_nlink && !is_bad_inode(inode))
886 want_delete = 1;
887
888 truncate_inode_pages_final(&inode->i_data);
889 if (want_delete) {
890 loff_t old_i_size;
891 /*UFS_I(inode)->i_dtime = CURRENT_TIME;*/
892 lock_ufs(inode->i_sb);
893 mark_inode_dirty(inode);
894 ufs_update_inode(inode, IS_SYNC(inode));
895 old_i_size = inode->i_size;
896 inode->i_size = 0;
897 if (inode->i_blocks && ufs_truncate(inode, old_i_size))
898 ufs_warning(inode->i_sb, __func__, "ufs_truncate failed\n");
899 unlock_ufs(inode->i_sb);
900 }
901
902 invalidate_inode_buffers(inode);
903 clear_inode(inode);
904
905 if (want_delete) {
906 lock_ufs(inode->i_sb);
907 ufs_free_inode (inode);
908 unlock_ufs(inode->i_sb);
909 }
910}