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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 <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 int ufs_write_begin(struct file *file, struct address_space *mapping,
530 loff_t pos, unsigned len, unsigned flags,
531 struct page **pagep, void **fsdata)
532{
533 int ret;
534
535 ret = block_write_begin(mapping, pos, len, flags, pagep,
536 ufs_getfrag_block);
537 if (unlikely(ret)) {
538 loff_t isize = mapping->host->i_size;
539 if (pos + len > isize)
540 vmtruncate(mapping->host, isize);
541 }
542
543 return ret;
544}
545
546static sector_t ufs_bmap(struct address_space *mapping, sector_t block)
547{
548 return generic_block_bmap(mapping,block,ufs_getfrag_block);
549}
550
551const struct address_space_operations ufs_aops = {
552 .readpage = ufs_readpage,
553 .writepage = ufs_writepage,
554 .write_begin = ufs_write_begin,
555 .write_end = generic_write_end,
556 .bmap = ufs_bmap
557};
558
559static void ufs_set_inode_ops(struct inode *inode)
560{
561 if (S_ISREG(inode->i_mode)) {
562 inode->i_op = &ufs_file_inode_operations;
563 inode->i_fop = &ufs_file_operations;
564 inode->i_mapping->a_ops = &ufs_aops;
565 } else if (S_ISDIR(inode->i_mode)) {
566 inode->i_op = &ufs_dir_inode_operations;
567 inode->i_fop = &ufs_dir_operations;
568 inode->i_mapping->a_ops = &ufs_aops;
569 } else if (S_ISLNK(inode->i_mode)) {
570 if (!inode->i_blocks)
571 inode->i_op = &ufs_fast_symlink_inode_operations;
572 else {
573 inode->i_op = &ufs_symlink_inode_operations;
574 inode->i_mapping->a_ops = &ufs_aops;
575 }
576 } else
577 init_special_inode(inode, inode->i_mode,
578 ufs_get_inode_dev(inode->i_sb, UFS_I(inode)));
579}
580
581static int ufs1_read_inode(struct inode *inode, struct ufs_inode *ufs_inode)
582{
583 struct ufs_inode_info *ufsi = UFS_I(inode);
584 struct super_block *sb = inode->i_sb;
585 umode_t mode;
586
587 /*
588 * Copy data to the in-core inode.
589 */
590 inode->i_mode = mode = fs16_to_cpu(sb, ufs_inode->ui_mode);
591 set_nlink(inode, fs16_to_cpu(sb, ufs_inode->ui_nlink));
592 if (inode->i_nlink == 0) {
593 ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino);
594 return -1;
595 }
596
597 /*
598 * Linux now has 32-bit uid and gid, so we can support EFT.
599 */
600 inode->i_uid = ufs_get_inode_uid(sb, ufs_inode);
601 inode->i_gid = ufs_get_inode_gid(sb, ufs_inode);
602
603 inode->i_size = fs64_to_cpu(sb, ufs_inode->ui_size);
604 inode->i_atime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_atime.tv_sec);
605 inode->i_ctime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_ctime.tv_sec);
606 inode->i_mtime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_mtime.tv_sec);
607 inode->i_mtime.tv_nsec = 0;
608 inode->i_atime.tv_nsec = 0;
609 inode->i_ctime.tv_nsec = 0;
610 inode->i_blocks = fs32_to_cpu(sb, ufs_inode->ui_blocks);
611 inode->i_generation = fs32_to_cpu(sb, ufs_inode->ui_gen);
612 ufsi->i_flags = fs32_to_cpu(sb, ufs_inode->ui_flags);
613 ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow);
614 ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag);
615
616
617 if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) {
618 memcpy(ufsi->i_u1.i_data, &ufs_inode->ui_u2.ui_addr,
619 sizeof(ufs_inode->ui_u2.ui_addr));
620 } else {
621 memcpy(ufsi->i_u1.i_symlink, ufs_inode->ui_u2.ui_symlink,
622 sizeof(ufs_inode->ui_u2.ui_symlink) - 1);
623 ufsi->i_u1.i_symlink[sizeof(ufs_inode->ui_u2.ui_symlink) - 1] = 0;
624 }
625 return 0;
626}
627
628static int ufs2_read_inode(struct inode *inode, struct ufs2_inode *ufs2_inode)
629{
630 struct ufs_inode_info *ufsi = UFS_I(inode);
631 struct super_block *sb = inode->i_sb;
632 umode_t mode;
633
634 UFSD("Reading ufs2 inode, ino %lu\n", inode->i_ino);
635 /*
636 * Copy data to the in-core inode.
637 */
638 inode->i_mode = mode = fs16_to_cpu(sb, ufs2_inode->ui_mode);
639 set_nlink(inode, fs16_to_cpu(sb, ufs2_inode->ui_nlink));
640 if (inode->i_nlink == 0) {
641 ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino);
642 return -1;
643 }
644
645 /*
646 * Linux now has 32-bit uid and gid, so we can support EFT.
647 */
648 inode->i_uid = fs32_to_cpu(sb, ufs2_inode->ui_uid);
649 inode->i_gid = fs32_to_cpu(sb, ufs2_inode->ui_gid);
650
651 inode->i_size = fs64_to_cpu(sb, ufs2_inode->ui_size);
652 inode->i_atime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_atime);
653 inode->i_ctime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_ctime);
654 inode->i_mtime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_mtime);
655 inode->i_atime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_atimensec);
656 inode->i_ctime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_ctimensec);
657 inode->i_mtime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_mtimensec);
658 inode->i_blocks = fs64_to_cpu(sb, ufs2_inode->ui_blocks);
659 inode->i_generation = fs32_to_cpu(sb, ufs2_inode->ui_gen);
660 ufsi->i_flags = fs32_to_cpu(sb, ufs2_inode->ui_flags);
661 /*
662 ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow);
663 ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag);
664 */
665
666 if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) {
667 memcpy(ufsi->i_u1.u2_i_data, &ufs2_inode->ui_u2.ui_addr,
668 sizeof(ufs2_inode->ui_u2.ui_addr));
669 } else {
670 memcpy(ufsi->i_u1.i_symlink, ufs2_inode->ui_u2.ui_symlink,
671 sizeof(ufs2_inode->ui_u2.ui_symlink) - 1);
672 ufsi->i_u1.i_symlink[sizeof(ufs2_inode->ui_u2.ui_symlink) - 1] = 0;
673 }
674 return 0;
675}
676
677struct inode *ufs_iget(struct super_block *sb, unsigned long ino)
678{
679 struct ufs_inode_info *ufsi;
680 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
681 struct buffer_head * bh;
682 struct inode *inode;
683 int err;
684
685 UFSD("ENTER, ino %lu\n", ino);
686
687 if (ino < UFS_ROOTINO || ino > (uspi->s_ncg * uspi->s_ipg)) {
688 ufs_warning(sb, "ufs_read_inode", "bad inode number (%lu)\n",
689 ino);
690 return ERR_PTR(-EIO);
691 }
692
693 inode = iget_locked(sb, ino);
694 if (!inode)
695 return ERR_PTR(-ENOMEM);
696 if (!(inode->i_state & I_NEW))
697 return inode;
698
699 ufsi = UFS_I(inode);
700
701 bh = sb_bread(sb, uspi->s_sbbase + ufs_inotofsba(inode->i_ino));
702 if (!bh) {
703 ufs_warning(sb, "ufs_read_inode", "unable to read inode %lu\n",
704 inode->i_ino);
705 goto bad_inode;
706 }
707 if ((UFS_SB(sb)->s_flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
708 struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data;
709
710 err = ufs2_read_inode(inode,
711 ufs2_inode + ufs_inotofsbo(inode->i_ino));
712 } else {
713 struct ufs_inode *ufs_inode = (struct ufs_inode *)bh->b_data;
714
715 err = ufs1_read_inode(inode,
716 ufs_inode + ufs_inotofsbo(inode->i_ino));
717 }
718
719 if (err)
720 goto bad_inode;
721 inode->i_version++;
722 ufsi->i_lastfrag =
723 (inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift;
724 ufsi->i_dir_start_lookup = 0;
725 ufsi->i_osync = 0;
726
727 ufs_set_inode_ops(inode);
728
729 brelse(bh);
730
731 UFSD("EXIT\n");
732 unlock_new_inode(inode);
733 return inode;
734
735bad_inode:
736 iget_failed(inode);
737 return ERR_PTR(-EIO);
738}
739
740static void ufs1_update_inode(struct inode *inode, struct ufs_inode *ufs_inode)
741{
742 struct super_block *sb = inode->i_sb;
743 struct ufs_inode_info *ufsi = UFS_I(inode);
744
745 ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode);
746 ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink);
747
748 ufs_set_inode_uid(sb, ufs_inode, inode->i_uid);
749 ufs_set_inode_gid(sb, ufs_inode, inode->i_gid);
750
751 ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size);
752 ufs_inode->ui_atime.tv_sec = cpu_to_fs32(sb, inode->i_atime.tv_sec);
753 ufs_inode->ui_atime.tv_usec = 0;
754 ufs_inode->ui_ctime.tv_sec = cpu_to_fs32(sb, inode->i_ctime.tv_sec);
755 ufs_inode->ui_ctime.tv_usec = 0;
756 ufs_inode->ui_mtime.tv_sec = cpu_to_fs32(sb, inode->i_mtime.tv_sec);
757 ufs_inode->ui_mtime.tv_usec = 0;
758 ufs_inode->ui_blocks = cpu_to_fs32(sb, inode->i_blocks);
759 ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags);
760 ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation);
761
762 if ((UFS_SB(sb)->s_flags & UFS_UID_MASK) == UFS_UID_EFT) {
763 ufs_inode->ui_u3.ui_sun.ui_shadow = cpu_to_fs32(sb, ufsi->i_shadow);
764 ufs_inode->ui_u3.ui_sun.ui_oeftflag = cpu_to_fs32(sb, ufsi->i_oeftflag);
765 }
766
767 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
768 /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */
769 ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.i_data[0];
770 } else if (inode->i_blocks) {
771 memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.i_data,
772 sizeof(ufs_inode->ui_u2.ui_addr));
773 }
774 else {
775 memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink,
776 sizeof(ufs_inode->ui_u2.ui_symlink));
777 }
778
779 if (!inode->i_nlink)
780 memset (ufs_inode, 0, sizeof(struct ufs_inode));
781}
782
783static void ufs2_update_inode(struct inode *inode, struct ufs2_inode *ufs_inode)
784{
785 struct super_block *sb = inode->i_sb;
786 struct ufs_inode_info *ufsi = UFS_I(inode);
787
788 UFSD("ENTER\n");
789 ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode);
790 ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink);
791
792 ufs_inode->ui_uid = cpu_to_fs32(sb, inode->i_uid);
793 ufs_inode->ui_gid = cpu_to_fs32(sb, inode->i_gid);
794
795 ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size);
796 ufs_inode->ui_atime = cpu_to_fs64(sb, inode->i_atime.tv_sec);
797 ufs_inode->ui_atimensec = cpu_to_fs32(sb, inode->i_atime.tv_nsec);
798 ufs_inode->ui_ctime = cpu_to_fs64(sb, inode->i_ctime.tv_sec);
799 ufs_inode->ui_ctimensec = cpu_to_fs32(sb, inode->i_ctime.tv_nsec);
800 ufs_inode->ui_mtime = cpu_to_fs64(sb, inode->i_mtime.tv_sec);
801 ufs_inode->ui_mtimensec = cpu_to_fs32(sb, inode->i_mtime.tv_nsec);
802
803 ufs_inode->ui_blocks = cpu_to_fs64(sb, inode->i_blocks);
804 ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags);
805 ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation);
806
807 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
808 /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */
809 ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.u2_i_data[0];
810 } else if (inode->i_blocks) {
811 memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.u2_i_data,
812 sizeof(ufs_inode->ui_u2.ui_addr));
813 } else {
814 memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink,
815 sizeof(ufs_inode->ui_u2.ui_symlink));
816 }
817
818 if (!inode->i_nlink)
819 memset (ufs_inode, 0, sizeof(struct ufs2_inode));
820 UFSD("EXIT\n");
821}
822
823static int ufs_update_inode(struct inode * inode, int do_sync)
824{
825 struct super_block *sb = inode->i_sb;
826 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
827 struct buffer_head * bh;
828
829 UFSD("ENTER, ino %lu\n", inode->i_ino);
830
831 if (inode->i_ino < UFS_ROOTINO ||
832 inode->i_ino > (uspi->s_ncg * uspi->s_ipg)) {
833 ufs_warning (sb, "ufs_read_inode", "bad inode number (%lu)\n", inode->i_ino);
834 return -1;
835 }
836
837 bh = sb_bread(sb, ufs_inotofsba(inode->i_ino));
838 if (!bh) {
839 ufs_warning (sb, "ufs_read_inode", "unable to read inode %lu\n", inode->i_ino);
840 return -1;
841 }
842 if (uspi->fs_magic == UFS2_MAGIC) {
843 struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data;
844
845 ufs2_update_inode(inode,
846 ufs2_inode + ufs_inotofsbo(inode->i_ino));
847 } else {
848 struct ufs_inode *ufs_inode = (struct ufs_inode *) bh->b_data;
849
850 ufs1_update_inode(inode, ufs_inode + ufs_inotofsbo(inode->i_ino));
851 }
852
853 mark_buffer_dirty(bh);
854 if (do_sync)
855 sync_dirty_buffer(bh);
856 brelse (bh);
857
858 UFSD("EXIT\n");
859 return 0;
860}
861
862int ufs_write_inode(struct inode *inode, struct writeback_control *wbc)
863{
864 int ret;
865 lock_ufs(inode->i_sb);
866 ret = ufs_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL);
867 unlock_ufs(inode->i_sb);
868 return ret;
869}
870
871int ufs_sync_inode (struct inode *inode)
872{
873 return ufs_update_inode (inode, 1);
874}
875
876void ufs_evict_inode(struct inode * inode)
877{
878 int want_delete = 0;
879
880 if (!inode->i_nlink && !is_bad_inode(inode))
881 want_delete = 1;
882
883 truncate_inode_pages(&inode->i_data, 0);
884 if (want_delete) {
885 loff_t old_i_size;
886 /*UFS_I(inode)->i_dtime = CURRENT_TIME;*/
887 lock_ufs(inode->i_sb);
888 mark_inode_dirty(inode);
889 ufs_update_inode(inode, IS_SYNC(inode));
890 old_i_size = inode->i_size;
891 inode->i_size = 0;
892 if (inode->i_blocks && ufs_truncate(inode, old_i_size))
893 ufs_warning(inode->i_sb, __func__, "ufs_truncate failed\n");
894 unlock_ufs(inode->i_sb);
895 }
896
897 invalidate_inode_buffers(inode);
898 clear_inode(inode);
899
900 if (want_delete) {
901 lock_ufs(inode->i_sb);
902 ufs_free_inode (inode);
903 unlock_ufs(inode->i_sb);
904 }
905}