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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 <linux/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 int ufs_block_to_path(struct inode *inode, sector_t i_block, unsigned offsets[4])
45{
46 struct ufs_sb_private_info *uspi = UFS_SB(inode->i_sb)->s_uspi;
47 int ptrs = uspi->s_apb;
48 int ptrs_bits = uspi->s_apbshift;
49 const long direct_blocks = UFS_NDADDR,
50 indirect_blocks = ptrs,
51 double_blocks = (1 << (ptrs_bits * 2));
52 int n = 0;
53
54
55 UFSD("ptrs=uspi->s_apb = %d,double_blocks=%ld \n",ptrs,double_blocks);
56 if (i_block < direct_blocks) {
57 offsets[n++] = i_block;
58 } else if ((i_block -= direct_blocks) < indirect_blocks) {
59 offsets[n++] = UFS_IND_BLOCK;
60 offsets[n++] = i_block;
61 } else if ((i_block -= indirect_blocks) < double_blocks) {
62 offsets[n++] = UFS_DIND_BLOCK;
63 offsets[n++] = i_block >> ptrs_bits;
64 offsets[n++] = i_block & (ptrs - 1);
65 } else if (((i_block -= double_blocks) >> (ptrs_bits * 2)) < ptrs) {
66 offsets[n++] = UFS_TIND_BLOCK;
67 offsets[n++] = i_block >> (ptrs_bits * 2);
68 offsets[n++] = (i_block >> ptrs_bits) & (ptrs - 1);
69 offsets[n++] = i_block & (ptrs - 1);
70 } else {
71 ufs_warning(inode->i_sb, "ufs_block_to_path", "block > big");
72 }
73 return n;
74}
75
76typedef struct {
77 void *p;
78 union {
79 __fs32 key32;
80 __fs64 key64;
81 };
82 struct buffer_head *bh;
83} Indirect;
84
85static inline int grow_chain32(struct ufs_inode_info *ufsi,
86 struct buffer_head *bh, __fs32 *v,
87 Indirect *from, Indirect *to)
88{
89 Indirect *p;
90 unsigned seq;
91 to->bh = bh;
92 do {
93 seq = read_seqbegin(&ufsi->meta_lock);
94 to->key32 = *(__fs32 *)(to->p = v);
95 for (p = from; p <= to && p->key32 == *(__fs32 *)p->p; p++)
96 ;
97 } while (read_seqretry(&ufsi->meta_lock, seq));
98 return (p > to);
99}
100
101static inline int grow_chain64(struct ufs_inode_info *ufsi,
102 struct buffer_head *bh, __fs64 *v,
103 Indirect *from, Indirect *to)
104{
105 Indirect *p;
106 unsigned seq;
107 to->bh = bh;
108 do {
109 seq = read_seqbegin(&ufsi->meta_lock);
110 to->key64 = *(__fs64 *)(to->p = v);
111 for (p = from; p <= to && p->key64 == *(__fs64 *)p->p; p++)
112 ;
113 } while (read_seqretry(&ufsi->meta_lock, seq));
114 return (p > to);
115}
116
117/*
118 * Returns the location of the fragment from
119 * the beginning of the filesystem.
120 */
121
122static u64 ufs_frag_map(struct inode *inode, unsigned offsets[4], int depth)
123{
124 struct ufs_inode_info *ufsi = UFS_I(inode);
125 struct super_block *sb = inode->i_sb;
126 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
127 u64 mask = (u64) uspi->s_apbmask>>uspi->s_fpbshift;
128 int shift = uspi->s_apbshift-uspi->s_fpbshift;
129 Indirect chain[4], *q = chain;
130 unsigned *p;
131 unsigned flags = UFS_SB(sb)->s_flags;
132 u64 res = 0;
133
134 UFSD(": uspi->s_fpbshift = %d ,uspi->s_apbmask = %x, mask=%llx\n",
135 uspi->s_fpbshift, uspi->s_apbmask,
136 (unsigned long long)mask);
137
138 if (depth == 0)
139 goto no_block;
140
141again:
142 p = offsets;
143
144 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
145 goto ufs2;
146
147 if (!grow_chain32(ufsi, NULL, &ufsi->i_u1.i_data[*p++], chain, q))
148 goto changed;
149 if (!q->key32)
150 goto no_block;
151 while (--depth) {
152 __fs32 *ptr;
153 struct buffer_head *bh;
154 unsigned n = *p++;
155
156 bh = sb_bread(sb, uspi->s_sbbase +
157 fs32_to_cpu(sb, q->key32) + (n>>shift));
158 if (!bh)
159 goto no_block;
160 ptr = (__fs32 *)bh->b_data + (n & mask);
161 if (!grow_chain32(ufsi, bh, ptr, chain, ++q))
162 goto changed;
163 if (!q->key32)
164 goto no_block;
165 }
166 res = fs32_to_cpu(sb, q->key32);
167 goto found;
168
169ufs2:
170 if (!grow_chain64(ufsi, NULL, &ufsi->i_u1.u2_i_data[*p++], chain, q))
171 goto changed;
172 if (!q->key64)
173 goto no_block;
174
175 while (--depth) {
176 __fs64 *ptr;
177 struct buffer_head *bh;
178 unsigned n = *p++;
179
180 bh = sb_bread(sb, uspi->s_sbbase +
181 fs64_to_cpu(sb, q->key64) + (n>>shift));
182 if (!bh)
183 goto no_block;
184 ptr = (__fs64 *)bh->b_data + (n & mask);
185 if (!grow_chain64(ufsi, bh, ptr, chain, ++q))
186 goto changed;
187 if (!q->key64)
188 goto no_block;
189 }
190 res = fs64_to_cpu(sb, q->key64);
191found:
192 res += uspi->s_sbbase;
193no_block:
194 while (q > chain) {
195 brelse(q->bh);
196 q--;
197 }
198 return res;
199
200changed:
201 while (q > chain) {
202 brelse(q->bh);
203 q--;
204 }
205 goto again;
206}
207
208/*
209 * Unpacking tails: we have a file with partial final block and
210 * we had been asked to extend it. If the fragment being written
211 * is within the same block, we need to extend the tail just to cover
212 * that fragment. Otherwise the tail is extended to full block.
213 *
214 * Note that we might need to create a _new_ tail, but that will
215 * be handled elsewhere; this is strictly for resizing old
216 * ones.
217 */
218static bool
219ufs_extend_tail(struct inode *inode, u64 writes_to,
220 int *err, struct page *locked_page)
221{
222 struct ufs_inode_info *ufsi = UFS_I(inode);
223 struct super_block *sb = inode->i_sb;
224 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
225 unsigned lastfrag = ufsi->i_lastfrag; /* it's a short file, so unsigned is enough */
226 unsigned block = ufs_fragstoblks(lastfrag);
227 unsigned new_size;
228 void *p;
229 u64 tmp;
230
231 if (writes_to < (lastfrag | uspi->s_fpbmask))
232 new_size = (writes_to & uspi->s_fpbmask) + 1;
233 else
234 new_size = uspi->s_fpb;
235
236 p = ufs_get_direct_data_ptr(uspi, ufsi, block);
237 tmp = ufs_new_fragments(inode, p, lastfrag, ufs_data_ptr_to_cpu(sb, p),
238 new_size, err, locked_page);
239 return tmp != 0;
240}
241
242/**
243 * ufs_inode_getfrag() - allocate new fragment(s)
244 * @inode: pointer to inode
245 * @index: number of block pointer within the inode's array.
246 * @new_fragment: number of new allocated fragment(s)
247 * @err: we set it if something wrong
248 * @new: we set it if we allocate new block
249 * @locked_page: for ufs_new_fragments()
250 */
251static u64
252ufs_inode_getfrag(struct inode *inode, unsigned index,
253 sector_t new_fragment, int *err,
254 int *new, struct page *locked_page)
255{
256 struct ufs_inode_info *ufsi = UFS_I(inode);
257 struct super_block *sb = inode->i_sb;
258 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
259 u64 tmp, goal, lastfrag;
260 unsigned nfrags = uspi->s_fpb;
261 void *p;
262
263 /* TODO : to be done for write support
264 if ( (flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
265 goto ufs2;
266 */
267
268 p = ufs_get_direct_data_ptr(uspi, ufsi, index);
269 tmp = ufs_data_ptr_to_cpu(sb, p);
270 if (tmp)
271 goto out;
272
273 lastfrag = ufsi->i_lastfrag;
274
275 /* will that be a new tail? */
276 if (new_fragment < UFS_NDIR_FRAGMENT && new_fragment >= lastfrag)
277 nfrags = (new_fragment & uspi->s_fpbmask) + 1;
278
279 goal = 0;
280 if (index) {
281 goal = ufs_data_ptr_to_cpu(sb,
282 ufs_get_direct_data_ptr(uspi, ufsi, index - 1));
283 if (goal)
284 goal += uspi->s_fpb;
285 }
286 tmp = ufs_new_fragments(inode, p, ufs_blknum(new_fragment),
287 goal, uspi->s_fpb, err, locked_page);
288
289 if (!tmp) {
290 *err = -ENOSPC;
291 return 0;
292 }
293
294 if (new)
295 *new = 1;
296 inode->i_ctime = current_time(inode);
297 if (IS_SYNC(inode))
298 ufs_sync_inode (inode);
299 mark_inode_dirty(inode);
300out:
301 return tmp + uspi->s_sbbase;
302
303 /* This part : To be implemented ....
304 Required only for writing, not required for READ-ONLY.
305ufs2:
306
307 u2_block = ufs_fragstoblks(fragment);
308 u2_blockoff = ufs_fragnum(fragment);
309 p = ufsi->i_u1.u2_i_data + block;
310 goal = 0;
311
312repeat2:
313 tmp = fs32_to_cpu(sb, *p);
314 lastfrag = ufsi->i_lastfrag;
315
316 */
317}
318
319/**
320 * ufs_inode_getblock() - allocate new block
321 * @inode: pointer to inode
322 * @ind_block: block number of the indirect block
323 * @index: number of pointer within the indirect block
324 * @new_fragment: number of new allocated fragment
325 * (block will hold this fragment and also uspi->s_fpb-1)
326 * @err: see ufs_inode_getfrag()
327 * @new: see ufs_inode_getfrag()
328 * @locked_page: see ufs_inode_getfrag()
329 */
330static u64
331ufs_inode_getblock(struct inode *inode, u64 ind_block,
332 unsigned index, sector_t new_fragment, int *err,
333 int *new, struct page *locked_page)
334{
335 struct super_block *sb = inode->i_sb;
336 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
337 int shift = uspi->s_apbshift - uspi->s_fpbshift;
338 u64 tmp = 0, goal;
339 struct buffer_head *bh;
340 void *p;
341
342 if (!ind_block)
343 return 0;
344
345 bh = sb_bread(sb, ind_block + (index >> shift));
346 if (unlikely(!bh)) {
347 *err = -EIO;
348 return 0;
349 }
350
351 index &= uspi->s_apbmask >> uspi->s_fpbshift;
352 if (uspi->fs_magic == UFS2_MAGIC)
353 p = (__fs64 *)bh->b_data + index;
354 else
355 p = (__fs32 *)bh->b_data + index;
356
357 tmp = ufs_data_ptr_to_cpu(sb, p);
358 if (tmp)
359 goto out;
360
361 if (index && (uspi->fs_magic == UFS2_MAGIC ?
362 (tmp = fs64_to_cpu(sb, ((__fs64 *)bh->b_data)[index-1])) :
363 (tmp = fs32_to_cpu(sb, ((__fs32 *)bh->b_data)[index-1]))))
364 goal = tmp + uspi->s_fpb;
365 else
366 goal = bh->b_blocknr + uspi->s_fpb;
367 tmp = ufs_new_fragments(inode, p, ufs_blknum(new_fragment), goal,
368 uspi->s_fpb, err, locked_page);
369 if (!tmp)
370 goto out;
371
372 if (new)
373 *new = 1;
374
375 mark_buffer_dirty(bh);
376 if (IS_SYNC(inode))
377 sync_dirty_buffer(bh);
378 inode->i_ctime = current_time(inode);
379 mark_inode_dirty(inode);
380out:
381 brelse (bh);
382 UFSD("EXIT\n");
383 if (tmp)
384 tmp += uspi->s_sbbase;
385 return tmp;
386}
387
388/**
389 * ufs_getfrag_block() - `get_block_t' function, interface between UFS and
390 * readpage, writepage and so on
391 */
392
393static int ufs_getfrag_block(struct inode *inode, sector_t fragment, struct buffer_head *bh_result, int create)
394{
395 struct super_block *sb = inode->i_sb;
396 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
397 int err = 0, new = 0;
398 unsigned offsets[4];
399 int depth = ufs_block_to_path(inode, fragment >> uspi->s_fpbshift, offsets);
400 u64 phys64 = 0;
401 unsigned frag = fragment & uspi->s_fpbmask;
402
403 if (!create) {
404 phys64 = ufs_frag_map(inode, offsets, depth);
405 goto out;
406 }
407
408 /* This code entered only while writing ....? */
409
410 mutex_lock(&UFS_I(inode)->truncate_mutex);
411
412 UFSD("ENTER, ino %lu, fragment %llu\n", inode->i_ino, (unsigned long long)fragment);
413 if (unlikely(!depth)) {
414 ufs_warning(sb, "ufs_get_block", "block > big");
415 err = -EIO;
416 goto out;
417 }
418
419 if (UFS_I(inode)->i_lastfrag < UFS_NDIR_FRAGMENT) {
420 unsigned lastfrag = UFS_I(inode)->i_lastfrag;
421 unsigned tailfrags = lastfrag & uspi->s_fpbmask;
422 if (tailfrags && fragment >= lastfrag) {
423 if (!ufs_extend_tail(inode, fragment,
424 &err, bh_result->b_page))
425 goto out;
426 }
427 }
428
429 if (depth == 1) {
430 phys64 = ufs_inode_getfrag(inode, offsets[0], fragment,
431 &err, &new, bh_result->b_page);
432 } else {
433 int i;
434 phys64 = ufs_inode_getfrag(inode, offsets[0], fragment,
435 &err, NULL, NULL);
436 for (i = 1; i < depth - 1; i++)
437 phys64 = ufs_inode_getblock(inode, phys64, offsets[i],
438 fragment, &err, NULL, NULL);
439 phys64 = ufs_inode_getblock(inode, phys64, offsets[depth - 1],
440 fragment, &err, &new, bh_result->b_page);
441 }
442out:
443 if (phys64) {
444 phys64 += frag;
445 map_bh(bh_result, sb, phys64);
446 if (new)
447 set_buffer_new(bh_result);
448 }
449 mutex_unlock(&UFS_I(inode)->truncate_mutex);
450 return err;
451}
452
453static int ufs_writepage(struct page *page, struct writeback_control *wbc)
454{
455 return block_write_full_page(page,ufs_getfrag_block,wbc);
456}
457
458static int ufs_readpage(struct file *file, struct page *page)
459{
460 return block_read_full_page(page,ufs_getfrag_block);
461}
462
463int ufs_prepare_chunk(struct page *page, loff_t pos, unsigned len)
464{
465 return __block_write_begin(page, pos, len, ufs_getfrag_block);
466}
467
468static void ufs_truncate_blocks(struct inode *);
469
470static void ufs_write_failed(struct address_space *mapping, loff_t to)
471{
472 struct inode *inode = mapping->host;
473
474 if (to > inode->i_size) {
475 truncate_pagecache(inode, inode->i_size);
476 ufs_truncate_blocks(inode);
477 }
478}
479
480static int ufs_write_begin(struct file *file, struct address_space *mapping,
481 loff_t pos, unsigned len, unsigned flags,
482 struct page **pagep, void **fsdata)
483{
484 int ret;
485
486 ret = block_write_begin(mapping, pos, len, flags, pagep,
487 ufs_getfrag_block);
488 if (unlikely(ret))
489 ufs_write_failed(mapping, pos + len);
490
491 return ret;
492}
493
494static int ufs_write_end(struct file *file, struct address_space *mapping,
495 loff_t pos, unsigned len, unsigned copied,
496 struct page *page, void *fsdata)
497{
498 int ret;
499
500 ret = generic_write_end(file, mapping, pos, len, copied, page, fsdata);
501 if (ret < len)
502 ufs_write_failed(mapping, pos + len);
503 return ret;
504}
505
506static sector_t ufs_bmap(struct address_space *mapping, sector_t block)
507{
508 return generic_block_bmap(mapping,block,ufs_getfrag_block);
509}
510
511const struct address_space_operations ufs_aops = {
512 .readpage = ufs_readpage,
513 .writepage = ufs_writepage,
514 .write_begin = ufs_write_begin,
515 .write_end = ufs_write_end,
516 .bmap = ufs_bmap
517};
518
519static void ufs_set_inode_ops(struct inode *inode)
520{
521 if (S_ISREG(inode->i_mode)) {
522 inode->i_op = &ufs_file_inode_operations;
523 inode->i_fop = &ufs_file_operations;
524 inode->i_mapping->a_ops = &ufs_aops;
525 } else if (S_ISDIR(inode->i_mode)) {
526 inode->i_op = &ufs_dir_inode_operations;
527 inode->i_fop = &ufs_dir_operations;
528 inode->i_mapping->a_ops = &ufs_aops;
529 } else if (S_ISLNK(inode->i_mode)) {
530 if (!inode->i_blocks) {
531 inode->i_link = (char *)UFS_I(inode)->i_u1.i_symlink;
532 inode->i_op = &simple_symlink_inode_operations;
533 } else {
534 inode->i_mapping->a_ops = &ufs_aops;
535 inode->i_op = &page_symlink_inode_operations;
536 inode_nohighmem(inode);
537 }
538 } else
539 init_special_inode(inode, inode->i_mode,
540 ufs_get_inode_dev(inode->i_sb, UFS_I(inode)));
541}
542
543static int ufs1_read_inode(struct inode *inode, struct ufs_inode *ufs_inode)
544{
545 struct ufs_inode_info *ufsi = UFS_I(inode);
546 struct super_block *sb = inode->i_sb;
547 umode_t mode;
548
549 /*
550 * Copy data to the in-core inode.
551 */
552 inode->i_mode = mode = fs16_to_cpu(sb, ufs_inode->ui_mode);
553 set_nlink(inode, fs16_to_cpu(sb, ufs_inode->ui_nlink));
554 if (inode->i_nlink == 0) {
555 ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino);
556 return -1;
557 }
558
559 /*
560 * Linux now has 32-bit uid and gid, so we can support EFT.
561 */
562 i_uid_write(inode, ufs_get_inode_uid(sb, ufs_inode));
563 i_gid_write(inode, ufs_get_inode_gid(sb, ufs_inode));
564
565 inode->i_size = fs64_to_cpu(sb, ufs_inode->ui_size);
566 inode->i_atime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_atime.tv_sec);
567 inode->i_ctime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_ctime.tv_sec);
568 inode->i_mtime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_mtime.tv_sec);
569 inode->i_mtime.tv_nsec = 0;
570 inode->i_atime.tv_nsec = 0;
571 inode->i_ctime.tv_nsec = 0;
572 inode->i_blocks = fs32_to_cpu(sb, ufs_inode->ui_blocks);
573 inode->i_generation = fs32_to_cpu(sb, ufs_inode->ui_gen);
574 ufsi->i_flags = fs32_to_cpu(sb, ufs_inode->ui_flags);
575 ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow);
576 ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag);
577
578
579 if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) {
580 memcpy(ufsi->i_u1.i_data, &ufs_inode->ui_u2.ui_addr,
581 sizeof(ufs_inode->ui_u2.ui_addr));
582 } else {
583 memcpy(ufsi->i_u1.i_symlink, ufs_inode->ui_u2.ui_symlink,
584 sizeof(ufs_inode->ui_u2.ui_symlink) - 1);
585 ufsi->i_u1.i_symlink[sizeof(ufs_inode->ui_u2.ui_symlink) - 1] = 0;
586 }
587 return 0;
588}
589
590static int ufs2_read_inode(struct inode *inode, struct ufs2_inode *ufs2_inode)
591{
592 struct ufs_inode_info *ufsi = UFS_I(inode);
593 struct super_block *sb = inode->i_sb;
594 umode_t mode;
595
596 UFSD("Reading ufs2 inode, ino %lu\n", inode->i_ino);
597 /*
598 * Copy data to the in-core inode.
599 */
600 inode->i_mode = mode = fs16_to_cpu(sb, ufs2_inode->ui_mode);
601 set_nlink(inode, fs16_to_cpu(sb, ufs2_inode->ui_nlink));
602 if (inode->i_nlink == 0) {
603 ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino);
604 return -1;
605 }
606
607 /*
608 * Linux now has 32-bit uid and gid, so we can support EFT.
609 */
610 i_uid_write(inode, fs32_to_cpu(sb, ufs2_inode->ui_uid));
611 i_gid_write(inode, fs32_to_cpu(sb, ufs2_inode->ui_gid));
612
613 inode->i_size = fs64_to_cpu(sb, ufs2_inode->ui_size);
614 inode->i_atime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_atime);
615 inode->i_ctime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_ctime);
616 inode->i_mtime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_mtime);
617 inode->i_atime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_atimensec);
618 inode->i_ctime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_ctimensec);
619 inode->i_mtime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_mtimensec);
620 inode->i_blocks = fs64_to_cpu(sb, ufs2_inode->ui_blocks);
621 inode->i_generation = fs32_to_cpu(sb, ufs2_inode->ui_gen);
622 ufsi->i_flags = fs32_to_cpu(sb, ufs2_inode->ui_flags);
623 /*
624 ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow);
625 ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag);
626 */
627
628 if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) {
629 memcpy(ufsi->i_u1.u2_i_data, &ufs2_inode->ui_u2.ui_addr,
630 sizeof(ufs2_inode->ui_u2.ui_addr));
631 } else {
632 memcpy(ufsi->i_u1.i_symlink, ufs2_inode->ui_u2.ui_symlink,
633 sizeof(ufs2_inode->ui_u2.ui_symlink) - 1);
634 ufsi->i_u1.i_symlink[sizeof(ufs2_inode->ui_u2.ui_symlink) - 1] = 0;
635 }
636 return 0;
637}
638
639struct inode *ufs_iget(struct super_block *sb, unsigned long ino)
640{
641 struct ufs_inode_info *ufsi;
642 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
643 struct buffer_head * bh;
644 struct inode *inode;
645 int err;
646
647 UFSD("ENTER, ino %lu\n", ino);
648
649 if (ino < UFS_ROOTINO || ino > (uspi->s_ncg * uspi->s_ipg)) {
650 ufs_warning(sb, "ufs_read_inode", "bad inode number (%lu)\n",
651 ino);
652 return ERR_PTR(-EIO);
653 }
654
655 inode = iget_locked(sb, ino);
656 if (!inode)
657 return ERR_PTR(-ENOMEM);
658 if (!(inode->i_state & I_NEW))
659 return inode;
660
661 ufsi = UFS_I(inode);
662
663 bh = sb_bread(sb, uspi->s_sbbase + ufs_inotofsba(inode->i_ino));
664 if (!bh) {
665 ufs_warning(sb, "ufs_read_inode", "unable to read inode %lu\n",
666 inode->i_ino);
667 goto bad_inode;
668 }
669 if ((UFS_SB(sb)->s_flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
670 struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data;
671
672 err = ufs2_read_inode(inode,
673 ufs2_inode + ufs_inotofsbo(inode->i_ino));
674 } else {
675 struct ufs_inode *ufs_inode = (struct ufs_inode *)bh->b_data;
676
677 err = ufs1_read_inode(inode,
678 ufs_inode + ufs_inotofsbo(inode->i_ino));
679 }
680
681 if (err)
682 goto bad_inode;
683 inode->i_version++;
684 ufsi->i_lastfrag =
685 (inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift;
686 ufsi->i_dir_start_lookup = 0;
687 ufsi->i_osync = 0;
688
689 ufs_set_inode_ops(inode);
690
691 brelse(bh);
692
693 UFSD("EXIT\n");
694 unlock_new_inode(inode);
695 return inode;
696
697bad_inode:
698 iget_failed(inode);
699 return ERR_PTR(-EIO);
700}
701
702static void ufs1_update_inode(struct inode *inode, struct ufs_inode *ufs_inode)
703{
704 struct super_block *sb = inode->i_sb;
705 struct ufs_inode_info *ufsi = UFS_I(inode);
706
707 ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode);
708 ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink);
709
710 ufs_set_inode_uid(sb, ufs_inode, i_uid_read(inode));
711 ufs_set_inode_gid(sb, ufs_inode, i_gid_read(inode));
712
713 ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size);
714 ufs_inode->ui_atime.tv_sec = cpu_to_fs32(sb, inode->i_atime.tv_sec);
715 ufs_inode->ui_atime.tv_usec = 0;
716 ufs_inode->ui_ctime.tv_sec = cpu_to_fs32(sb, inode->i_ctime.tv_sec);
717 ufs_inode->ui_ctime.tv_usec = 0;
718 ufs_inode->ui_mtime.tv_sec = cpu_to_fs32(sb, inode->i_mtime.tv_sec);
719 ufs_inode->ui_mtime.tv_usec = 0;
720 ufs_inode->ui_blocks = cpu_to_fs32(sb, inode->i_blocks);
721 ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags);
722 ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation);
723
724 if ((UFS_SB(sb)->s_flags & UFS_UID_MASK) == UFS_UID_EFT) {
725 ufs_inode->ui_u3.ui_sun.ui_shadow = cpu_to_fs32(sb, ufsi->i_shadow);
726 ufs_inode->ui_u3.ui_sun.ui_oeftflag = cpu_to_fs32(sb, ufsi->i_oeftflag);
727 }
728
729 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
730 /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */
731 ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.i_data[0];
732 } else if (inode->i_blocks) {
733 memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.i_data,
734 sizeof(ufs_inode->ui_u2.ui_addr));
735 }
736 else {
737 memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink,
738 sizeof(ufs_inode->ui_u2.ui_symlink));
739 }
740
741 if (!inode->i_nlink)
742 memset (ufs_inode, 0, sizeof(struct ufs_inode));
743}
744
745static void ufs2_update_inode(struct inode *inode, struct ufs2_inode *ufs_inode)
746{
747 struct super_block *sb = inode->i_sb;
748 struct ufs_inode_info *ufsi = UFS_I(inode);
749
750 UFSD("ENTER\n");
751 ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode);
752 ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink);
753
754 ufs_inode->ui_uid = cpu_to_fs32(sb, i_uid_read(inode));
755 ufs_inode->ui_gid = cpu_to_fs32(sb, i_gid_read(inode));
756
757 ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size);
758 ufs_inode->ui_atime = cpu_to_fs64(sb, inode->i_atime.tv_sec);
759 ufs_inode->ui_atimensec = cpu_to_fs32(sb, inode->i_atime.tv_nsec);
760 ufs_inode->ui_ctime = cpu_to_fs64(sb, inode->i_ctime.tv_sec);
761 ufs_inode->ui_ctimensec = cpu_to_fs32(sb, inode->i_ctime.tv_nsec);
762 ufs_inode->ui_mtime = cpu_to_fs64(sb, inode->i_mtime.tv_sec);
763 ufs_inode->ui_mtimensec = cpu_to_fs32(sb, inode->i_mtime.tv_nsec);
764
765 ufs_inode->ui_blocks = cpu_to_fs64(sb, inode->i_blocks);
766 ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags);
767 ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation);
768
769 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
770 /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */
771 ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.u2_i_data[0];
772 } else if (inode->i_blocks) {
773 memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.u2_i_data,
774 sizeof(ufs_inode->ui_u2.ui_addr));
775 } else {
776 memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink,
777 sizeof(ufs_inode->ui_u2.ui_symlink));
778 }
779
780 if (!inode->i_nlink)
781 memset (ufs_inode, 0, sizeof(struct ufs2_inode));
782 UFSD("EXIT\n");
783}
784
785static int ufs_update_inode(struct inode * inode, int do_sync)
786{
787 struct super_block *sb = inode->i_sb;
788 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
789 struct buffer_head * bh;
790
791 UFSD("ENTER, ino %lu\n", inode->i_ino);
792
793 if (inode->i_ino < UFS_ROOTINO ||
794 inode->i_ino > (uspi->s_ncg * uspi->s_ipg)) {
795 ufs_warning (sb, "ufs_read_inode", "bad inode number (%lu)\n", inode->i_ino);
796 return -1;
797 }
798
799 bh = sb_bread(sb, ufs_inotofsba(inode->i_ino));
800 if (!bh) {
801 ufs_warning (sb, "ufs_read_inode", "unable to read inode %lu\n", inode->i_ino);
802 return -1;
803 }
804 if (uspi->fs_magic == UFS2_MAGIC) {
805 struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data;
806
807 ufs2_update_inode(inode,
808 ufs2_inode + ufs_inotofsbo(inode->i_ino));
809 } else {
810 struct ufs_inode *ufs_inode = (struct ufs_inode *) bh->b_data;
811
812 ufs1_update_inode(inode, ufs_inode + ufs_inotofsbo(inode->i_ino));
813 }
814
815 mark_buffer_dirty(bh);
816 if (do_sync)
817 sync_dirty_buffer(bh);
818 brelse (bh);
819
820 UFSD("EXIT\n");
821 return 0;
822}
823
824int ufs_write_inode(struct inode *inode, struct writeback_control *wbc)
825{
826 return ufs_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL);
827}
828
829int ufs_sync_inode (struct inode *inode)
830{
831 return ufs_update_inode (inode, 1);
832}
833
834void ufs_evict_inode(struct inode * inode)
835{
836 int want_delete = 0;
837
838 if (!inode->i_nlink && !is_bad_inode(inode))
839 want_delete = 1;
840
841 truncate_inode_pages_final(&inode->i_data);
842 if (want_delete) {
843 inode->i_size = 0;
844 if (inode->i_blocks)
845 ufs_truncate_blocks(inode);
846 }
847
848 invalidate_inode_buffers(inode);
849 clear_inode(inode);
850
851 if (want_delete)
852 ufs_free_inode(inode);
853}
854
855struct to_free {
856 struct inode *inode;
857 u64 to;
858 unsigned count;
859};
860
861static inline void free_data(struct to_free *ctx, u64 from, unsigned count)
862{
863 if (ctx->count && ctx->to != from) {
864 ufs_free_blocks(ctx->inode, ctx->to - ctx->count, ctx->count);
865 ctx->count = 0;
866 }
867 ctx->count += count;
868 ctx->to = from + count;
869}
870
871#define DIRECT_BLOCK ((inode->i_size + uspi->s_bsize - 1) >> uspi->s_bshift)
872#define DIRECT_FRAGMENT ((inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift)
873
874static void ufs_trunc_direct(struct inode *inode)
875{
876 struct ufs_inode_info *ufsi = UFS_I(inode);
877 struct super_block * sb;
878 struct ufs_sb_private_info * uspi;
879 void *p;
880 u64 frag1, frag2, frag3, frag4, block1, block2;
881 struct to_free ctx = {.inode = inode};
882 unsigned i, tmp;
883
884 UFSD("ENTER: ino %lu\n", inode->i_ino);
885
886 sb = inode->i_sb;
887 uspi = UFS_SB(sb)->s_uspi;
888
889 frag1 = DIRECT_FRAGMENT;
890 frag4 = min_t(u64, UFS_NDIR_FRAGMENT, ufsi->i_lastfrag);
891 frag2 = ((frag1 & uspi->s_fpbmask) ? ((frag1 | uspi->s_fpbmask) + 1) : frag1);
892 frag3 = frag4 & ~uspi->s_fpbmask;
893 block1 = block2 = 0;
894 if (frag2 > frag3) {
895 frag2 = frag4;
896 frag3 = frag4 = 0;
897 } else if (frag2 < frag3) {
898 block1 = ufs_fragstoblks (frag2);
899 block2 = ufs_fragstoblks (frag3);
900 }
901
902 UFSD("ino %lu, frag1 %llu, frag2 %llu, block1 %llu, block2 %llu,"
903 " frag3 %llu, frag4 %llu\n", inode->i_ino,
904 (unsigned long long)frag1, (unsigned long long)frag2,
905 (unsigned long long)block1, (unsigned long long)block2,
906 (unsigned long long)frag3, (unsigned long long)frag4);
907
908 if (frag1 >= frag2)
909 goto next1;
910
911 /*
912 * Free first free fragments
913 */
914 p = ufs_get_direct_data_ptr(uspi, ufsi, ufs_fragstoblks(frag1));
915 tmp = ufs_data_ptr_to_cpu(sb, p);
916 if (!tmp )
917 ufs_panic (sb, "ufs_trunc_direct", "internal error");
918 frag2 -= frag1;
919 frag1 = ufs_fragnum (frag1);
920
921 ufs_free_fragments(inode, tmp + frag1, frag2);
922
923next1:
924 /*
925 * Free whole blocks
926 */
927 for (i = block1 ; i < block2; i++) {
928 p = ufs_get_direct_data_ptr(uspi, ufsi, i);
929 tmp = ufs_data_ptr_to_cpu(sb, p);
930 if (!tmp)
931 continue;
932 write_seqlock(&ufsi->meta_lock);
933 ufs_data_ptr_clear(uspi, p);
934 write_sequnlock(&ufsi->meta_lock);
935
936 free_data(&ctx, tmp, uspi->s_fpb);
937 }
938
939 free_data(&ctx, 0, 0);
940
941 if (frag3 >= frag4)
942 goto next3;
943
944 /*
945 * Free last free fragments
946 */
947 p = ufs_get_direct_data_ptr(uspi, ufsi, ufs_fragstoblks(frag3));
948 tmp = ufs_data_ptr_to_cpu(sb, p);
949 if (!tmp )
950 ufs_panic(sb, "ufs_truncate_direct", "internal error");
951 frag4 = ufs_fragnum (frag4);
952 write_seqlock(&ufsi->meta_lock);
953 ufs_data_ptr_clear(uspi, p);
954 write_sequnlock(&ufsi->meta_lock);
955
956 ufs_free_fragments (inode, tmp, frag4);
957 next3:
958
959 UFSD("EXIT: ino %lu\n", inode->i_ino);
960}
961
962static void free_full_branch(struct inode *inode, u64 ind_block, int depth)
963{
964 struct super_block *sb = inode->i_sb;
965 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
966 struct ufs_buffer_head *ubh = ubh_bread(sb, ind_block, uspi->s_bsize);
967 unsigned i;
968
969 if (!ubh)
970 return;
971
972 if (--depth) {
973 for (i = 0; i < uspi->s_apb; i++) {
974 void *p = ubh_get_data_ptr(uspi, ubh, i);
975 u64 block = ufs_data_ptr_to_cpu(sb, p);
976 if (block)
977 free_full_branch(inode, block, depth);
978 }
979 } else {
980 struct to_free ctx = {.inode = inode};
981
982 for (i = 0; i < uspi->s_apb; i++) {
983 void *p = ubh_get_data_ptr(uspi, ubh, i);
984 u64 block = ufs_data_ptr_to_cpu(sb, p);
985 if (block)
986 free_data(&ctx, block, uspi->s_fpb);
987 }
988 free_data(&ctx, 0, 0);
989 }
990
991 ubh_bforget(ubh);
992 ufs_free_blocks(inode, ind_block, uspi->s_fpb);
993}
994
995static void free_branch_tail(struct inode *inode, unsigned from, struct ufs_buffer_head *ubh, int depth)
996{
997 struct super_block *sb = inode->i_sb;
998 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
999 unsigned i;
1000
1001 if (--depth) {
1002 for (i = from; i < uspi->s_apb ; i++) {
1003 void *p = ubh_get_data_ptr(uspi, ubh, i);
1004 u64 block = ufs_data_ptr_to_cpu(sb, p);
1005 if (block) {
1006 write_seqlock(&UFS_I(inode)->meta_lock);
1007 ufs_data_ptr_clear(uspi, p);
1008 write_sequnlock(&UFS_I(inode)->meta_lock);
1009 ubh_mark_buffer_dirty(ubh);
1010 free_full_branch(inode, block, depth);
1011 }
1012 }
1013 } else {
1014 struct to_free ctx = {.inode = inode};
1015
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_data(&ctx, block, uspi->s_fpb);
1025 }
1026 }
1027 free_data(&ctx, 0, 0);
1028 }
1029 if (IS_SYNC(inode) && ubh_buffer_dirty(ubh))
1030 ubh_sync_block(ubh);
1031 ubh_brelse(ubh);
1032}
1033
1034static int ufs_alloc_lastblock(struct inode *inode, loff_t size)
1035{
1036 int err = 0;
1037 struct super_block *sb = inode->i_sb;
1038 struct address_space *mapping = inode->i_mapping;
1039 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
1040 unsigned i, end;
1041 sector_t lastfrag;
1042 struct page *lastpage;
1043 struct buffer_head *bh;
1044 u64 phys64;
1045
1046 lastfrag = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
1047
1048 if (!lastfrag)
1049 goto out;
1050
1051 lastfrag--;
1052
1053 lastpage = ufs_get_locked_page(mapping, lastfrag >>
1054 (PAGE_SHIFT - inode->i_blkbits));
1055 if (IS_ERR(lastpage)) {
1056 err = -EIO;
1057 goto out;
1058 }
1059
1060 end = lastfrag & ((1 << (PAGE_SHIFT - inode->i_blkbits)) - 1);
1061 bh = page_buffers(lastpage);
1062 for (i = 0; i < end; ++i)
1063 bh = bh->b_this_page;
1064
1065
1066 err = ufs_getfrag_block(inode, lastfrag, bh, 1);
1067
1068 if (unlikely(err))
1069 goto out_unlock;
1070
1071 if (buffer_new(bh)) {
1072 clear_buffer_new(bh);
1073 clean_bdev_bh_alias(bh);
1074 /*
1075 * we do not zeroize fragment, because of
1076 * if it maped to hole, it already contains zeroes
1077 */
1078 set_buffer_uptodate(bh);
1079 mark_buffer_dirty(bh);
1080 set_page_dirty(lastpage);
1081 }
1082
1083 if (lastfrag >= UFS_IND_FRAGMENT) {
1084 end = uspi->s_fpb - ufs_fragnum(lastfrag) - 1;
1085 phys64 = bh->b_blocknr + 1;
1086 for (i = 0; i < end; ++i) {
1087 bh = sb_getblk(sb, i + phys64);
1088 lock_buffer(bh);
1089 memset(bh->b_data, 0, sb->s_blocksize);
1090 set_buffer_uptodate(bh);
1091 mark_buffer_dirty(bh);
1092 unlock_buffer(bh);
1093 sync_dirty_buffer(bh);
1094 brelse(bh);
1095 }
1096 }
1097out_unlock:
1098 ufs_put_locked_page(lastpage);
1099out:
1100 return err;
1101}
1102
1103static void __ufs_truncate_blocks(struct inode *inode)
1104{
1105 struct ufs_inode_info *ufsi = UFS_I(inode);
1106 struct super_block *sb = inode->i_sb;
1107 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
1108 unsigned offsets[4];
1109 int depth = ufs_block_to_path(inode, DIRECT_BLOCK, offsets);
1110 int depth2;
1111 unsigned i;
1112 struct ufs_buffer_head *ubh[3];
1113 void *p;
1114 u64 block;
1115
1116 if (!depth)
1117 return;
1118
1119 /* find the last non-zero in offsets[] */
1120 for (depth2 = depth - 1; depth2; depth2--)
1121 if (offsets[depth2])
1122 break;
1123
1124 mutex_lock(&ufsi->truncate_mutex);
1125 if (depth == 1) {
1126 ufs_trunc_direct(inode);
1127 offsets[0] = UFS_IND_BLOCK;
1128 } else {
1129 /* get the blocks that should be partially emptied */
1130 p = ufs_get_direct_data_ptr(uspi, ufsi, offsets[0]);
1131 for (i = 0; i < depth2; i++) {
1132 offsets[i]++; /* next branch is fully freed */
1133 block = ufs_data_ptr_to_cpu(sb, p);
1134 if (!block)
1135 break;
1136 ubh[i] = ubh_bread(sb, block, uspi->s_bsize);
1137 if (!ubh[i]) {
1138 write_seqlock(&ufsi->meta_lock);
1139 ufs_data_ptr_clear(uspi, p);
1140 write_sequnlock(&ufsi->meta_lock);
1141 break;
1142 }
1143 p = ubh_get_data_ptr(uspi, ubh[i], offsets[i + 1]);
1144 }
1145 while (i--)
1146 free_branch_tail(inode, offsets[i + 1], ubh[i], depth - i - 1);
1147 }
1148 for (i = offsets[0]; i <= UFS_TIND_BLOCK; i++) {
1149 p = ufs_get_direct_data_ptr(uspi, ufsi, i);
1150 block = ufs_data_ptr_to_cpu(sb, p);
1151 if (block) {
1152 write_seqlock(&ufsi->meta_lock);
1153 ufs_data_ptr_clear(uspi, p);
1154 write_sequnlock(&ufsi->meta_lock);
1155 free_full_branch(inode, block, i - UFS_IND_BLOCK + 1);
1156 }
1157 }
1158 ufsi->i_lastfrag = DIRECT_FRAGMENT;
1159 mark_inode_dirty(inode);
1160 mutex_unlock(&ufsi->truncate_mutex);
1161}
1162
1163static int ufs_truncate(struct inode *inode, loff_t size)
1164{
1165 int err = 0;
1166
1167 UFSD("ENTER: ino %lu, i_size: %llu, old_i_size: %llu\n",
1168 inode->i_ino, (unsigned long long)size,
1169 (unsigned long long)i_size_read(inode));
1170
1171 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
1172 S_ISLNK(inode->i_mode)))
1173 return -EINVAL;
1174 if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
1175 return -EPERM;
1176
1177 err = ufs_alloc_lastblock(inode, size);
1178
1179 if (err)
1180 goto out;
1181
1182 block_truncate_page(inode->i_mapping, size, ufs_getfrag_block);
1183
1184 truncate_setsize(inode, size);
1185
1186 __ufs_truncate_blocks(inode);
1187 inode->i_mtime = inode->i_ctime = current_time(inode);
1188 mark_inode_dirty(inode);
1189out:
1190 UFSD("EXIT: err %d\n", err);
1191 return err;
1192}
1193
1194static void ufs_truncate_blocks(struct inode *inode)
1195{
1196 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
1197 S_ISLNK(inode->i_mode)))
1198 return;
1199 if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
1200 return;
1201 __ufs_truncate_blocks(inode);
1202}
1203
1204int ufs_setattr(struct dentry *dentry, struct iattr *attr)
1205{
1206 struct inode *inode = d_inode(dentry);
1207 unsigned int ia_valid = attr->ia_valid;
1208 int error;
1209
1210 error = setattr_prepare(dentry, attr);
1211 if (error)
1212 return error;
1213
1214 if (ia_valid & ATTR_SIZE && attr->ia_size != inode->i_size) {
1215 error = ufs_truncate(inode, attr->ia_size);
1216 if (error)
1217 return error;
1218 }
1219
1220 setattr_copy(inode, attr);
1221 mark_inode_dirty(inode);
1222 return 0;
1223}
1224
1225const struct inode_operations ufs_file_inode_operations = {
1226 .setattr = ufs_setattr,
1227};
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#include <asm/system.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
40#include "ufs_fs.h"
41#include "ufs.h"
42#include "swab.h"
43#include "util.h"
44
45static u64 ufs_frag_map(struct inode *inode, sector_t frag, bool needs_lock);
46
47static int ufs_block_to_path(struct inode *inode, sector_t i_block, sector_t offsets[4])
48{
49 struct ufs_sb_private_info *uspi = UFS_SB(inode->i_sb)->s_uspi;
50 int ptrs = uspi->s_apb;
51 int ptrs_bits = uspi->s_apbshift;
52 const long direct_blocks = UFS_NDADDR,
53 indirect_blocks = ptrs,
54 double_blocks = (1 << (ptrs_bits * 2));
55 int n = 0;
56
57
58 UFSD("ptrs=uspi->s_apb = %d,double_blocks=%ld \n",ptrs,double_blocks);
59 if (i_block < direct_blocks) {
60 offsets[n++] = i_block;
61 } else if ((i_block -= direct_blocks) < indirect_blocks) {
62 offsets[n++] = UFS_IND_BLOCK;
63 offsets[n++] = i_block;
64 } else if ((i_block -= indirect_blocks) < double_blocks) {
65 offsets[n++] = UFS_DIND_BLOCK;
66 offsets[n++] = i_block >> ptrs_bits;
67 offsets[n++] = i_block & (ptrs - 1);
68 } else if (((i_block -= double_blocks) >> (ptrs_bits * 2)) < ptrs) {
69 offsets[n++] = UFS_TIND_BLOCK;
70 offsets[n++] = i_block >> (ptrs_bits * 2);
71 offsets[n++] = (i_block >> ptrs_bits) & (ptrs - 1);
72 offsets[n++] = i_block & (ptrs - 1);
73 } else {
74 ufs_warning(inode->i_sb, "ufs_block_to_path", "block > big");
75 }
76 return n;
77}
78
79/*
80 * Returns the location of the fragment from
81 * the beginning of the filesystem.
82 */
83
84static u64 ufs_frag_map(struct inode *inode, sector_t frag, bool needs_lock)
85{
86 struct ufs_inode_info *ufsi = UFS_I(inode);
87 struct super_block *sb = inode->i_sb;
88 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
89 u64 mask = (u64) uspi->s_apbmask>>uspi->s_fpbshift;
90 int shift = uspi->s_apbshift-uspi->s_fpbshift;
91 sector_t offsets[4], *p;
92 int depth = ufs_block_to_path(inode, frag >> uspi->s_fpbshift, offsets);
93 u64 ret = 0L;
94 __fs32 block;
95 __fs64 u2_block = 0L;
96 unsigned flags = UFS_SB(sb)->s_flags;
97 u64 temp = 0L;
98
99 UFSD(": frag = %llu depth = %d\n", (unsigned long long)frag, depth);
100 UFSD(": uspi->s_fpbshift = %d ,uspi->s_apbmask = %x, mask=%llx\n",
101 uspi->s_fpbshift, uspi->s_apbmask,
102 (unsigned long long)mask);
103
104 if (depth == 0)
105 return 0;
106
107 p = offsets;
108
109 if (needs_lock)
110 lock_ufs(sb);
111 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
112 goto ufs2;
113
114 block = ufsi->i_u1.i_data[*p++];
115 if (!block)
116 goto out;
117 while (--depth) {
118 struct buffer_head *bh;
119 sector_t n = *p++;
120
121 bh = sb_bread(sb, uspi->s_sbbase + fs32_to_cpu(sb, block)+(n>>shift));
122 if (!bh)
123 goto out;
124 block = ((__fs32 *) bh->b_data)[n & mask];
125 brelse (bh);
126 if (!block)
127 goto out;
128 }
129 ret = (u64) (uspi->s_sbbase + fs32_to_cpu(sb, block) + (frag & uspi->s_fpbmask));
130 goto out;
131ufs2:
132 u2_block = ufsi->i_u1.u2_i_data[*p++];
133 if (!u2_block)
134 goto out;
135
136
137 while (--depth) {
138 struct buffer_head *bh;
139 sector_t n = *p++;
140
141
142 temp = (u64)(uspi->s_sbbase) + fs64_to_cpu(sb, u2_block);
143 bh = sb_bread(sb, temp +(u64) (n>>shift));
144 if (!bh)
145 goto out;
146 u2_block = ((__fs64 *)bh->b_data)[n & mask];
147 brelse(bh);
148 if (!u2_block)
149 goto out;
150 }
151 temp = (u64)uspi->s_sbbase + fs64_to_cpu(sb, u2_block);
152 ret = temp + (u64) (frag & uspi->s_fpbmask);
153
154out:
155 if (needs_lock)
156 unlock_ufs(sb);
157 return ret;
158}
159
160/**
161 * ufs_inode_getfrag() - allocate new fragment(s)
162 * @inode - pointer to inode
163 * @fragment - number of `fragment' which hold pointer
164 * to new allocated fragment(s)
165 * @new_fragment - number of new allocated fragment(s)
166 * @required - how many fragment(s) we require
167 * @err - we set it if something wrong
168 * @phys - pointer to where we save physical number of new allocated fragments,
169 * NULL if we allocate not data(indirect blocks for example).
170 * @new - we set it if we allocate new block
171 * @locked_page - for ufs_new_fragments()
172 */
173static struct buffer_head *
174ufs_inode_getfrag(struct inode *inode, u64 fragment,
175 sector_t new_fragment, unsigned int required, int *err,
176 long *phys, int *new, struct page *locked_page)
177{
178 struct ufs_inode_info *ufsi = UFS_I(inode);
179 struct super_block *sb = inode->i_sb;
180 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
181 struct buffer_head * result;
182 unsigned blockoff, lastblockoff;
183 u64 tmp, goal, lastfrag, block, lastblock;
184 void *p, *p2;
185
186 UFSD("ENTER, ino %lu, fragment %llu, new_fragment %llu, required %u, "
187 "metadata %d\n", inode->i_ino, (unsigned long long)fragment,
188 (unsigned long long)new_fragment, required, !phys);
189
190 /* TODO : to be done for write support
191 if ( (flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
192 goto ufs2;
193 */
194
195 block = ufs_fragstoblks (fragment);
196 blockoff = ufs_fragnum (fragment);
197 p = ufs_get_direct_data_ptr(uspi, ufsi, block);
198
199 goal = 0;
200
201repeat:
202 tmp = ufs_data_ptr_to_cpu(sb, p);
203
204 lastfrag = ufsi->i_lastfrag;
205 if (tmp && fragment < lastfrag) {
206 if (!phys) {
207 result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff);
208 if (tmp == ufs_data_ptr_to_cpu(sb, p)) {
209 UFSD("EXIT, result %llu\n",
210 (unsigned long long)tmp + blockoff);
211 return result;
212 }
213 brelse (result);
214 goto repeat;
215 } else {
216 *phys = uspi->s_sbbase + tmp + blockoff;
217 return NULL;
218 }
219 }
220
221 lastblock = ufs_fragstoblks (lastfrag);
222 lastblockoff = ufs_fragnum (lastfrag);
223 /*
224 * We will extend file into new block beyond last allocated block
225 */
226 if (lastblock < block) {
227 /*
228 * We must reallocate last allocated block
229 */
230 if (lastblockoff) {
231 p2 = ufs_get_direct_data_ptr(uspi, ufsi, lastblock);
232 tmp = ufs_new_fragments(inode, p2, lastfrag,
233 ufs_data_ptr_to_cpu(sb, p2),
234 uspi->s_fpb - lastblockoff,
235 err, locked_page);
236 if (!tmp) {
237 if (lastfrag != ufsi->i_lastfrag)
238 goto repeat;
239 else
240 return NULL;
241 }
242 lastfrag = ufsi->i_lastfrag;
243
244 }
245 tmp = ufs_data_ptr_to_cpu(sb,
246 ufs_get_direct_data_ptr(uspi, ufsi,
247 lastblock));
248 if (tmp)
249 goal = tmp + uspi->s_fpb;
250 tmp = ufs_new_fragments (inode, p, fragment - blockoff,
251 goal, required + blockoff,
252 err,
253 phys != NULL ? locked_page : NULL);
254 } else if (lastblock == block) {
255 /*
256 * We will extend last allocated block
257 */
258 tmp = ufs_new_fragments(inode, p, fragment -
259 (blockoff - lastblockoff),
260 ufs_data_ptr_to_cpu(sb, p),
261 required + (blockoff - lastblockoff),
262 err, phys != NULL ? locked_page : NULL);
263 } else /* (lastblock > block) */ {
264 /*
265 * We will allocate new block before last allocated block
266 */
267 if (block) {
268 tmp = ufs_data_ptr_to_cpu(sb,
269 ufs_get_direct_data_ptr(uspi, ufsi, block - 1));
270 if (tmp)
271 goal = tmp + uspi->s_fpb;
272 }
273 tmp = ufs_new_fragments(inode, p, fragment - blockoff,
274 goal, uspi->s_fpb, err,
275 phys != NULL ? locked_page : NULL);
276 }
277 if (!tmp) {
278 if ((!blockoff && ufs_data_ptr_to_cpu(sb, p)) ||
279 (blockoff && lastfrag != ufsi->i_lastfrag))
280 goto repeat;
281 *err = -ENOSPC;
282 return NULL;
283 }
284
285 if (!phys) {
286 result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff);
287 } else {
288 *phys = uspi->s_sbbase + tmp + blockoff;
289 result = NULL;
290 *err = 0;
291 *new = 1;
292 }
293
294 inode->i_ctime = CURRENT_TIME_SEC;
295 if (IS_SYNC(inode))
296 ufs_sync_inode (inode);
297 mark_inode_dirty(inode);
298 UFSD("EXIT, result %llu\n", (unsigned long long)tmp + blockoff);
299 return result;
300
301 /* This part : To be implemented ....
302 Required only for writing, not required for READ-ONLY.
303ufs2:
304
305 u2_block = ufs_fragstoblks(fragment);
306 u2_blockoff = ufs_fragnum(fragment);
307 p = ufsi->i_u1.u2_i_data + block;
308 goal = 0;
309
310repeat2:
311 tmp = fs32_to_cpu(sb, *p);
312 lastfrag = ufsi->i_lastfrag;
313
314 */
315}
316
317/**
318 * ufs_inode_getblock() - allocate new block
319 * @inode - pointer to inode
320 * @bh - pointer to block which hold "pointer" to new allocated block
321 * @fragment - number of `fragment' which hold pointer
322 * to new allocated block
323 * @new_fragment - number of new allocated fragment
324 * (block will hold this fragment and also uspi->s_fpb-1)
325 * @err - see ufs_inode_getfrag()
326 * @phys - see ufs_inode_getfrag()
327 * @new - see ufs_inode_getfrag()
328 * @locked_page - see ufs_inode_getfrag()
329 */
330static struct buffer_head *
331ufs_inode_getblock(struct inode *inode, struct buffer_head *bh,
332 u64 fragment, sector_t new_fragment, int *err,
333 long *phys, int *new, struct page *locked_page)
334{
335 struct super_block *sb = inode->i_sb;
336 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
337 struct buffer_head * result;
338 unsigned blockoff;
339 u64 tmp, goal, block;
340 void *p;
341
342 block = ufs_fragstoblks (fragment);
343 blockoff = ufs_fragnum (fragment);
344
345 UFSD("ENTER, ino %lu, fragment %llu, new_fragment %llu, metadata %d\n",
346 inode->i_ino, (unsigned long long)fragment,
347 (unsigned long long)new_fragment, !phys);
348
349 result = NULL;
350 if (!bh)
351 goto out;
352 if (!buffer_uptodate(bh)) {
353 ll_rw_block (READ, 1, &bh);
354 wait_on_buffer (bh);
355 if (!buffer_uptodate(bh))
356 goto out;
357 }
358 if (uspi->fs_magic == UFS2_MAGIC)
359 p = (__fs64 *)bh->b_data + block;
360 else
361 p = (__fs32 *)bh->b_data + block;
362repeat:
363 tmp = ufs_data_ptr_to_cpu(sb, p);
364 if (tmp) {
365 if (!phys) {
366 result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff);
367 if (tmp == ufs_data_ptr_to_cpu(sb, p))
368 goto out;
369 brelse (result);
370 goto repeat;
371 } else {
372 *phys = uspi->s_sbbase + tmp + blockoff;
373 goto out;
374 }
375 }
376
377 if (block && (uspi->fs_magic == UFS2_MAGIC ?
378 (tmp = fs64_to_cpu(sb, ((__fs64 *)bh->b_data)[block-1])) :
379 (tmp = fs32_to_cpu(sb, ((__fs32 *)bh->b_data)[block-1]))))
380 goal = tmp + uspi->s_fpb;
381 else
382 goal = bh->b_blocknr + uspi->s_fpb;
383 tmp = ufs_new_fragments(inode, p, ufs_blknum(new_fragment), goal,
384 uspi->s_fpb, err, locked_page);
385 if (!tmp) {
386 if (ufs_data_ptr_to_cpu(sb, p))
387 goto repeat;
388 goto out;
389 }
390
391
392 if (!phys) {
393 result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff);
394 } else {
395 *phys = uspi->s_sbbase + tmp + blockoff;
396 *new = 1;
397 }
398
399 mark_buffer_dirty(bh);
400 if (IS_SYNC(inode))
401 sync_dirty_buffer(bh);
402 inode->i_ctime = CURRENT_TIME_SEC;
403 mark_inode_dirty(inode);
404 UFSD("result %llu\n", (unsigned long long)tmp + blockoff);
405out:
406 brelse (bh);
407 UFSD("EXIT\n");
408 return result;
409}
410
411/**
412 * ufs_getfrag_block() - `get_block_t' function, interface between UFS and
413 * readpage, writepage and so on
414 */
415
416int ufs_getfrag_block(struct inode *inode, sector_t fragment, struct buffer_head *bh_result, int create)
417{
418 struct super_block * sb = inode->i_sb;
419 struct ufs_sb_info * sbi = UFS_SB(sb);
420 struct ufs_sb_private_info * uspi = sbi->s_uspi;
421 struct buffer_head * bh;
422 int ret, err, new;
423 unsigned long ptr,phys;
424 u64 phys64 = 0;
425 bool needs_lock = (sbi->mutex_owner != current);
426
427 if (!create) {
428 phys64 = ufs_frag_map(inode, fragment, needs_lock);
429 UFSD("phys64 = %llu\n", (unsigned long long)phys64);
430 if (phys64)
431 map_bh(bh_result, sb, phys64);
432 return 0;
433 }
434
435 /* This code entered only while writing ....? */
436
437 err = -EIO;
438 new = 0;
439 ret = 0;
440 bh = NULL;
441
442 if (needs_lock)
443 lock_ufs(sb);
444
445 UFSD("ENTER, ino %lu, fragment %llu\n", inode->i_ino, (unsigned long long)fragment);
446 if (fragment >
447 ((UFS_NDADDR + uspi->s_apb + uspi->s_2apb + uspi->s_3apb)
448 << uspi->s_fpbshift))
449 goto abort_too_big;
450
451 err = 0;
452 ptr = fragment;
453
454 /*
455 * ok, these macros clean the logic up a bit and make
456 * it much more readable:
457 */
458#define GET_INODE_DATABLOCK(x) \
459 ufs_inode_getfrag(inode, x, fragment, 1, &err, &phys, &new,\
460 bh_result->b_page)
461#define GET_INODE_PTR(x) \
462 ufs_inode_getfrag(inode, x, fragment, uspi->s_fpb, &err, NULL, NULL,\
463 bh_result->b_page)
464#define GET_INDIRECT_DATABLOCK(x) \
465 ufs_inode_getblock(inode, bh, x, fragment, \
466 &err, &phys, &new, bh_result->b_page)
467#define GET_INDIRECT_PTR(x) \
468 ufs_inode_getblock(inode, bh, x, fragment, \
469 &err, NULL, NULL, NULL)
470
471 if (ptr < UFS_NDIR_FRAGMENT) {
472 bh = GET_INODE_DATABLOCK(ptr);
473 goto out;
474 }
475 ptr -= UFS_NDIR_FRAGMENT;
476 if (ptr < (1 << (uspi->s_apbshift + uspi->s_fpbshift))) {
477 bh = GET_INODE_PTR(UFS_IND_FRAGMENT + (ptr >> uspi->s_apbshift));
478 goto get_indirect;
479 }
480 ptr -= 1 << (uspi->s_apbshift + uspi->s_fpbshift);
481 if (ptr < (1 << (uspi->s_2apbshift + uspi->s_fpbshift))) {
482 bh = GET_INODE_PTR(UFS_DIND_FRAGMENT + (ptr >> uspi->s_2apbshift));
483 goto get_double;
484 }
485 ptr -= 1 << (uspi->s_2apbshift + uspi->s_fpbshift);
486 bh = GET_INODE_PTR(UFS_TIND_FRAGMENT + (ptr >> uspi->s_3apbshift));
487 bh = GET_INDIRECT_PTR((ptr >> uspi->s_2apbshift) & uspi->s_apbmask);
488get_double:
489 bh = GET_INDIRECT_PTR((ptr >> uspi->s_apbshift) & uspi->s_apbmask);
490get_indirect:
491 bh = GET_INDIRECT_DATABLOCK(ptr & uspi->s_apbmask);
492
493#undef GET_INODE_DATABLOCK
494#undef GET_INODE_PTR
495#undef GET_INDIRECT_DATABLOCK
496#undef GET_INDIRECT_PTR
497
498out:
499 if (err)
500 goto abort;
501 if (new)
502 set_buffer_new(bh_result);
503 map_bh(bh_result, sb, phys);
504abort:
505 if (needs_lock)
506 unlock_ufs(sb);
507
508 return err;
509
510abort_too_big:
511 ufs_warning(sb, "ufs_get_block", "block > big");
512 goto abort;
513}
514
515static int ufs_writepage(struct page *page, struct writeback_control *wbc)
516{
517 return block_write_full_page(page,ufs_getfrag_block,wbc);
518}
519
520static int ufs_readpage(struct file *file, struct page *page)
521{
522 return block_read_full_page(page,ufs_getfrag_block);
523}
524
525int ufs_prepare_chunk(struct page *page, loff_t pos, unsigned len)
526{
527 return __block_write_begin(page, pos, len, ufs_getfrag_block);
528}
529
530static int ufs_write_begin(struct file *file, struct address_space *mapping,
531 loff_t pos, unsigned len, unsigned flags,
532 struct page **pagep, void **fsdata)
533{
534 int ret;
535
536 ret = block_write_begin(mapping, pos, len, flags, pagep,
537 ufs_getfrag_block);
538 if (unlikely(ret)) {
539 loff_t isize = mapping->host->i_size;
540 if (pos + len > isize)
541 vmtruncate(mapping->host, isize);
542 }
543
544 return ret;
545}
546
547static sector_t ufs_bmap(struct address_space *mapping, sector_t block)
548{
549 return generic_block_bmap(mapping,block,ufs_getfrag_block);
550}
551
552const struct address_space_operations ufs_aops = {
553 .readpage = ufs_readpage,
554 .writepage = ufs_writepage,
555 .write_begin = ufs_write_begin,
556 .write_end = generic_write_end,
557 .bmap = ufs_bmap
558};
559
560static void ufs_set_inode_ops(struct inode *inode)
561{
562 if (S_ISREG(inode->i_mode)) {
563 inode->i_op = &ufs_file_inode_operations;
564 inode->i_fop = &ufs_file_operations;
565 inode->i_mapping->a_ops = &ufs_aops;
566 } else if (S_ISDIR(inode->i_mode)) {
567 inode->i_op = &ufs_dir_inode_operations;
568 inode->i_fop = &ufs_dir_operations;
569 inode->i_mapping->a_ops = &ufs_aops;
570 } else if (S_ISLNK(inode->i_mode)) {
571 if (!inode->i_blocks)
572 inode->i_op = &ufs_fast_symlink_inode_operations;
573 else {
574 inode->i_op = &ufs_symlink_inode_operations;
575 inode->i_mapping->a_ops = &ufs_aops;
576 }
577 } else
578 init_special_inode(inode, inode->i_mode,
579 ufs_get_inode_dev(inode->i_sb, UFS_I(inode)));
580}
581
582static int ufs1_read_inode(struct inode *inode, struct ufs_inode *ufs_inode)
583{
584 struct ufs_inode_info *ufsi = UFS_I(inode);
585 struct super_block *sb = inode->i_sb;
586 mode_t mode;
587
588 /*
589 * Copy data to the in-core inode.
590 */
591 inode->i_mode = mode = fs16_to_cpu(sb, ufs_inode->ui_mode);
592 inode->i_nlink = fs16_to_cpu(sb, ufs_inode->ui_nlink);
593 if (inode->i_nlink == 0) {
594 ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino);
595 return -1;
596 }
597
598 /*
599 * Linux now has 32-bit uid and gid, so we can support EFT.
600 */
601 inode->i_uid = ufs_get_inode_uid(sb, ufs_inode);
602 inode->i_gid = ufs_get_inode_gid(sb, ufs_inode);
603
604 inode->i_size = fs64_to_cpu(sb, ufs_inode->ui_size);
605 inode->i_atime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_atime.tv_sec);
606 inode->i_ctime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_ctime.tv_sec);
607 inode->i_mtime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_mtime.tv_sec);
608 inode->i_mtime.tv_nsec = 0;
609 inode->i_atime.tv_nsec = 0;
610 inode->i_ctime.tv_nsec = 0;
611 inode->i_blocks = fs32_to_cpu(sb, ufs_inode->ui_blocks);
612 inode->i_generation = fs32_to_cpu(sb, ufs_inode->ui_gen);
613 ufsi->i_flags = fs32_to_cpu(sb, ufs_inode->ui_flags);
614 ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow);
615 ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag);
616
617
618 if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) {
619 memcpy(ufsi->i_u1.i_data, &ufs_inode->ui_u2.ui_addr,
620 sizeof(ufs_inode->ui_u2.ui_addr));
621 } else {
622 memcpy(ufsi->i_u1.i_symlink, ufs_inode->ui_u2.ui_symlink,
623 sizeof(ufs_inode->ui_u2.ui_symlink) - 1);
624 ufsi->i_u1.i_symlink[sizeof(ufs_inode->ui_u2.ui_symlink) - 1] = 0;
625 }
626 return 0;
627}
628
629static int ufs2_read_inode(struct inode *inode, struct ufs2_inode *ufs2_inode)
630{
631 struct ufs_inode_info *ufsi = UFS_I(inode);
632 struct super_block *sb = inode->i_sb;
633 mode_t mode;
634
635 UFSD("Reading ufs2 inode, ino %lu\n", inode->i_ino);
636 /*
637 * Copy data to the in-core inode.
638 */
639 inode->i_mode = mode = fs16_to_cpu(sb, ufs2_inode->ui_mode);
640 inode->i_nlink = fs16_to_cpu(sb, ufs2_inode->ui_nlink);
641 if (inode->i_nlink == 0) {
642 ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino);
643 return -1;
644 }
645
646 /*
647 * Linux now has 32-bit uid and gid, so we can support EFT.
648 */
649 inode->i_uid = fs32_to_cpu(sb, ufs2_inode->ui_uid);
650 inode->i_gid = fs32_to_cpu(sb, ufs2_inode->ui_gid);
651
652 inode->i_size = fs64_to_cpu(sb, ufs2_inode->ui_size);
653 inode->i_atime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_atime);
654 inode->i_ctime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_ctime);
655 inode->i_mtime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_mtime);
656 inode->i_atime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_atimensec);
657 inode->i_ctime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_ctimensec);
658 inode->i_mtime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_mtimensec);
659 inode->i_blocks = fs64_to_cpu(sb, ufs2_inode->ui_blocks);
660 inode->i_generation = fs32_to_cpu(sb, ufs2_inode->ui_gen);
661 ufsi->i_flags = fs32_to_cpu(sb, ufs2_inode->ui_flags);
662 /*
663 ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow);
664 ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag);
665 */
666
667 if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) {
668 memcpy(ufsi->i_u1.u2_i_data, &ufs2_inode->ui_u2.ui_addr,
669 sizeof(ufs2_inode->ui_u2.ui_addr));
670 } else {
671 memcpy(ufsi->i_u1.i_symlink, ufs2_inode->ui_u2.ui_symlink,
672 sizeof(ufs2_inode->ui_u2.ui_symlink) - 1);
673 ufsi->i_u1.i_symlink[sizeof(ufs2_inode->ui_u2.ui_symlink) - 1] = 0;
674 }
675 return 0;
676}
677
678struct inode *ufs_iget(struct super_block *sb, unsigned long ino)
679{
680 struct ufs_inode_info *ufsi;
681 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
682 struct buffer_head * bh;
683 struct inode *inode;
684 int err;
685
686 UFSD("ENTER, ino %lu\n", ino);
687
688 if (ino < UFS_ROOTINO || ino > (uspi->s_ncg * uspi->s_ipg)) {
689 ufs_warning(sb, "ufs_read_inode", "bad inode number (%lu)\n",
690 ino);
691 return ERR_PTR(-EIO);
692 }
693
694 inode = iget_locked(sb, ino);
695 if (!inode)
696 return ERR_PTR(-ENOMEM);
697 if (!(inode->i_state & I_NEW))
698 return inode;
699
700 ufsi = UFS_I(inode);
701
702 bh = sb_bread(sb, uspi->s_sbbase + ufs_inotofsba(inode->i_ino));
703 if (!bh) {
704 ufs_warning(sb, "ufs_read_inode", "unable to read inode %lu\n",
705 inode->i_ino);
706 goto bad_inode;
707 }
708 if ((UFS_SB(sb)->s_flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
709 struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data;
710
711 err = ufs2_read_inode(inode,
712 ufs2_inode + ufs_inotofsbo(inode->i_ino));
713 } else {
714 struct ufs_inode *ufs_inode = (struct ufs_inode *)bh->b_data;
715
716 err = ufs1_read_inode(inode,
717 ufs_inode + ufs_inotofsbo(inode->i_ino));
718 }
719
720 if (err)
721 goto bad_inode;
722 inode->i_version++;
723 ufsi->i_lastfrag =
724 (inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift;
725 ufsi->i_dir_start_lookup = 0;
726 ufsi->i_osync = 0;
727
728 ufs_set_inode_ops(inode);
729
730 brelse(bh);
731
732 UFSD("EXIT\n");
733 unlock_new_inode(inode);
734 return inode;
735
736bad_inode:
737 iget_failed(inode);
738 return ERR_PTR(-EIO);
739}
740
741static void ufs1_update_inode(struct inode *inode, struct ufs_inode *ufs_inode)
742{
743 struct super_block *sb = inode->i_sb;
744 struct ufs_inode_info *ufsi = UFS_I(inode);
745
746 ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode);
747 ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink);
748
749 ufs_set_inode_uid(sb, ufs_inode, inode->i_uid);
750 ufs_set_inode_gid(sb, ufs_inode, inode->i_gid);
751
752 ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size);
753 ufs_inode->ui_atime.tv_sec = cpu_to_fs32(sb, inode->i_atime.tv_sec);
754 ufs_inode->ui_atime.tv_usec = 0;
755 ufs_inode->ui_ctime.tv_sec = cpu_to_fs32(sb, inode->i_ctime.tv_sec);
756 ufs_inode->ui_ctime.tv_usec = 0;
757 ufs_inode->ui_mtime.tv_sec = cpu_to_fs32(sb, inode->i_mtime.tv_sec);
758 ufs_inode->ui_mtime.tv_usec = 0;
759 ufs_inode->ui_blocks = cpu_to_fs32(sb, inode->i_blocks);
760 ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags);
761 ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation);
762
763 if ((UFS_SB(sb)->s_flags & UFS_UID_MASK) == UFS_UID_EFT) {
764 ufs_inode->ui_u3.ui_sun.ui_shadow = cpu_to_fs32(sb, ufsi->i_shadow);
765 ufs_inode->ui_u3.ui_sun.ui_oeftflag = cpu_to_fs32(sb, ufsi->i_oeftflag);
766 }
767
768 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
769 /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */
770 ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.i_data[0];
771 } else if (inode->i_blocks) {
772 memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.i_data,
773 sizeof(ufs_inode->ui_u2.ui_addr));
774 }
775 else {
776 memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink,
777 sizeof(ufs_inode->ui_u2.ui_symlink));
778 }
779
780 if (!inode->i_nlink)
781 memset (ufs_inode, 0, sizeof(struct ufs_inode));
782}
783
784static void ufs2_update_inode(struct inode *inode, struct ufs2_inode *ufs_inode)
785{
786 struct super_block *sb = inode->i_sb;
787 struct ufs_inode_info *ufsi = UFS_I(inode);
788
789 UFSD("ENTER\n");
790 ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode);
791 ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink);
792
793 ufs_inode->ui_uid = cpu_to_fs32(sb, inode->i_uid);
794 ufs_inode->ui_gid = cpu_to_fs32(sb, inode->i_gid);
795
796 ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size);
797 ufs_inode->ui_atime = cpu_to_fs64(sb, inode->i_atime.tv_sec);
798 ufs_inode->ui_atimensec = cpu_to_fs32(sb, inode->i_atime.tv_nsec);
799 ufs_inode->ui_ctime = cpu_to_fs64(sb, inode->i_ctime.tv_sec);
800 ufs_inode->ui_ctimensec = cpu_to_fs32(sb, inode->i_ctime.tv_nsec);
801 ufs_inode->ui_mtime = cpu_to_fs64(sb, inode->i_mtime.tv_sec);
802 ufs_inode->ui_mtimensec = cpu_to_fs32(sb, inode->i_mtime.tv_nsec);
803
804 ufs_inode->ui_blocks = cpu_to_fs64(sb, inode->i_blocks);
805 ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags);
806 ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation);
807
808 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
809 /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */
810 ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.u2_i_data[0];
811 } else if (inode->i_blocks) {
812 memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.u2_i_data,
813 sizeof(ufs_inode->ui_u2.ui_addr));
814 } else {
815 memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink,
816 sizeof(ufs_inode->ui_u2.ui_symlink));
817 }
818
819 if (!inode->i_nlink)
820 memset (ufs_inode, 0, sizeof(struct ufs2_inode));
821 UFSD("EXIT\n");
822}
823
824static int ufs_update_inode(struct inode * inode, int do_sync)
825{
826 struct super_block *sb = inode->i_sb;
827 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
828 struct buffer_head * bh;
829
830 UFSD("ENTER, ino %lu\n", inode->i_ino);
831
832 if (inode->i_ino < UFS_ROOTINO ||
833 inode->i_ino > (uspi->s_ncg * uspi->s_ipg)) {
834 ufs_warning (sb, "ufs_read_inode", "bad inode number (%lu)\n", inode->i_ino);
835 return -1;
836 }
837
838 bh = sb_bread(sb, ufs_inotofsba(inode->i_ino));
839 if (!bh) {
840 ufs_warning (sb, "ufs_read_inode", "unable to read inode %lu\n", inode->i_ino);
841 return -1;
842 }
843 if (uspi->fs_magic == UFS2_MAGIC) {
844 struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data;
845
846 ufs2_update_inode(inode,
847 ufs2_inode + ufs_inotofsbo(inode->i_ino));
848 } else {
849 struct ufs_inode *ufs_inode = (struct ufs_inode *) bh->b_data;
850
851 ufs1_update_inode(inode, ufs_inode + ufs_inotofsbo(inode->i_ino));
852 }
853
854 mark_buffer_dirty(bh);
855 if (do_sync)
856 sync_dirty_buffer(bh);
857 brelse (bh);
858
859 UFSD("EXIT\n");
860 return 0;
861}
862
863int ufs_write_inode(struct inode *inode, struct writeback_control *wbc)
864{
865 int ret;
866 lock_ufs(inode->i_sb);
867 ret = ufs_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL);
868 unlock_ufs(inode->i_sb);
869 return ret;
870}
871
872int ufs_sync_inode (struct inode *inode)
873{
874 return ufs_update_inode (inode, 1);
875}
876
877void ufs_evict_inode(struct inode * inode)
878{
879 int want_delete = 0;
880
881 if (!inode->i_nlink && !is_bad_inode(inode))
882 want_delete = 1;
883
884 truncate_inode_pages(&inode->i_data, 0);
885 if (want_delete) {
886 loff_t old_i_size;
887 /*UFS_I(inode)->i_dtime = CURRENT_TIME;*/
888 lock_ufs(inode->i_sb);
889 mark_inode_dirty(inode);
890 ufs_update_inode(inode, IS_SYNC(inode));
891 old_i_size = inode->i_size;
892 inode->i_size = 0;
893 if (inode->i_blocks && ufs_truncate(inode, old_i_size))
894 ufs_warning(inode->i_sb, __func__, "ufs_truncate failed\n");
895 unlock_ufs(inode->i_sb);
896 }
897
898 invalidate_inode_buffers(inode);
899 end_writeback(inode);
900
901 if (want_delete) {
902 lock_ufs(inode->i_sb);
903 ufs_free_inode (inode);
904 unlock_ufs(inode->i_sb);
905 }
906}