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[PATCH] ufs: right block allocation
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / fs / ufs / inode.c
CommitLineData
1da177e4
LT		 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/ufs_fs.h>
34#include <linux/time.h>
35#include <linux/stat.h>
36#include <linux/string.h>
37#include <linux/mm.h>
38#include <linux/smp_lock.h>
39#include <linux/buffer_head.h>
40
41#include "swab.h"
42#include "util.h"
43
44#undef UFS_INODE_DEBUG
45#undef UFS_INODE_DEBUG_MORE
46
47#ifdef UFS_INODE_DEBUG
48#define UFSD(x) printk("(%s, %d), %s: ", __FILE__, __LINE__, __FUNCTION__); printk x;
49#else
50#define UFSD(x)
51#endif
52
53static int ufs_block_to_path(struct inode *inode, sector_t i_block, sector_t offsets[4])
54{
55 struct ufs_sb_private_info *uspi = UFS_SB(inode->i_sb)->s_uspi;
56 int ptrs = uspi->s_apb;
57 int ptrs_bits = uspi->s_apbshift;
58 const long direct_blocks = UFS_NDADDR,
59 indirect_blocks = ptrs,
60 double_blocks = (1 << (ptrs_bits * 2));
61 int n = 0;
62
63
7b4ee73e 64 UFSD(("ptrs=uspi->s_apb = %d,double_blocks=%ld \n",ptrs,double_blocks));
1da177e4
LT		 65 if (i_block < 0) {
66 ufs_warning(inode->i_sb, "ufs_block_to_path", "block < 0");
67 } else if (i_block < direct_blocks) {
68 offsets[n++] = i_block;
69 } else if ((i_block -= direct_blocks) < indirect_blocks) {
70 offsets[n++] = UFS_IND_BLOCK;
71 offsets[n++] = i_block;
72 } else if ((i_block -= indirect_blocks) < double_blocks) {
73 offsets[n++] = UFS_DIND_BLOCK;
74 offsets[n++] = i_block >> ptrs_bits;
75 offsets[n++] = i_block & (ptrs - 1);
76 } else if (((i_block -= double_blocks) >> (ptrs_bits * 2)) < ptrs) {
77 offsets[n++] = UFS_TIND_BLOCK;
78 offsets[n++] = i_block >> (ptrs_bits * 2);
79 offsets[n++] = (i_block >> ptrs_bits) & (ptrs - 1);
80 offsets[n++] = i_block & (ptrs - 1);
81 } else {
82 ufs_warning(inode->i_sb, "ufs_block_to_path", "block > big");
83 }
84 return n;
85}
86
87/*
88 * Returns the location of the fragment from
89 * the begining of the filesystem.
90 */
91
92u64 ufs_frag_map(struct inode *inode, sector_t frag)
93{
94 struct ufs_inode_info *ufsi = UFS_I(inode);
95 struct super_block *sb = inode->i_sb;
96 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
97 u64 mask = (u64) uspi->s_apbmask>>uspi->s_fpbshift;
98 int shift = uspi->s_apbshift-uspi->s_fpbshift;
99 sector_t offsets[4], *p;
100 int depth = ufs_block_to_path(inode, frag >> uspi->s_fpbshift, offsets);
101 u64 ret = 0L;
102 __fs32 block;
103 __fs64 u2_block = 0L;
104 unsigned flags = UFS_SB(sb)->s_flags;
105 u64 temp = 0L;
106
7b4ee73e 107 UFSD((": frag = %llu depth = %d\n", (unsigned long long)frag, depth));
1da177e4
LT		 108 UFSD((": uspi->s_fpbshift = %d ,uspi->s_apbmask = %x, mask=%llx\n",uspi->s_fpbshift,uspi->s_apbmask,mask));
109
110 if (depth == 0)
111 return 0;
112
113 p = offsets;
114
115 lock_kernel();
116 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
117 goto ufs2;
118
119 block = ufsi->i_u1.i_data[*p++];
120 if (!block)
121 goto out;
122 while (--depth) {
123 struct buffer_head *bh;
124 sector_t n = *p++;
125
126 bh = sb_bread(sb, uspi->s_sbbase + fs32_to_cpu(sb, block)+(n>>shift));
127 if (!bh)
128 goto out;
129 block = ((__fs32 *) bh->b_data)[n & mask];
130 brelse (bh);
131 if (!block)
132 goto out;
133 }
134 ret = (u64) (uspi->s_sbbase + fs32_to_cpu(sb, block) + (frag & uspi->s_fpbmask));
135 goto out;
136ufs2:
137 u2_block = ufsi->i_u1.u2_i_data[*p++];
138 if (!u2_block)
139 goto out;
140
141
142 while (--depth) {
143 struct buffer_head *bh;
144 sector_t n = *p++;
145
146
147 temp = (u64)(uspi->s_sbbase) + fs64_to_cpu(sb, u2_block);
148 bh = sb_bread(sb, temp +(u64) (n>>shift));
149 if (!bh)
150 goto out;
151 u2_block = ((__fs64 *)bh->b_data)[n & mask];
152 brelse(bh);
153 if (!u2_block)
154 goto out;
155 }
156 temp = (u64)uspi->s_sbbase + fs64_to_cpu(sb, u2_block);
157 ret = temp + (u64) (frag & uspi->s_fpbmask);
158
159out:
160 unlock_kernel();
161 return ret;
162}
163
c9a27b5d
ED		 164static void ufs_clear_block(struct inode *inode, struct buffer_head *bh)
165{
166 lock_buffer(bh);
167 memset(bh->b_data, 0, inode->i_sb->s_blocksize);
168 set_buffer_uptodate(bh);
169 mark_buffer_dirty(bh);
170 unlock_buffer(bh);
171 if (IS_SYNC(inode))
172 sync_dirty_buffer(bh);
173}
174
1da177e4
LT		 175static struct buffer_head * ufs_inode_getfrag (struct inode *inode,
176 unsigned int fragment, unsigned int new_fragment,
177 unsigned int required, int *err, int metadata, long *phys, int *new)
178{
179 struct ufs_inode_info *ufsi = UFS_I(inode);
180 struct super_block * sb;
181 struct ufs_sb_private_info * uspi;
182 struct buffer_head * result;
183 unsigned block, blockoff, lastfrag, lastblock, lastblockoff;
184 unsigned tmp, goal;
185 __fs32 * p, * p2;
186 unsigned flags = 0;
187
188 UFSD(("ENTER, ino %lu, fragment %u, new_fragment %u, required %u\n",
189 inode->i_ino, fragment, new_fragment, required))
190
191 sb = inode->i_sb;
192 uspi = UFS_SB(sb)->s_uspi;
193
194 flags = UFS_SB(sb)->s_flags;
195 /* TODO : to be done for write support
196 if ( (flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
197 goto ufs2;
198 */
199
200 block = ufs_fragstoblks (fragment);
201 blockoff = ufs_fragnum (fragment);
202 p = ufsi->i_u1.i_data + block;
203 goal = 0;
204
205repeat:
206 tmp = fs32_to_cpu(sb, *p);
207 lastfrag = ufsi->i_lastfrag;
208 if (tmp && fragment < lastfrag) {
209 if (metadata) {
210 result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff);
211 if (tmp == fs32_to_cpu(sb, *p)) {
212 UFSD(("EXIT, result %u\n", tmp + blockoff))
213 return result;
214 }
215 brelse (result);
216 goto repeat;
217 } else {
c9a27b5d 218 *phys = tmp + blockoff;
1da177e4
LT		 219 return NULL;
220 }
221 }
222
223 lastblock = ufs_fragstoblks (lastfrag);
224 lastblockoff = ufs_fragnum (lastfrag);
225 /*
226 * We will extend file into new block beyond last allocated block
227 */
228 if (lastblock < block) {
229 /*
230 * We must reallocate last allocated block
231 */
232 if (lastblockoff) {
233 p2 = ufsi->i_u1.i_data + lastblock;
234 tmp = ufs_new_fragments (inode, p2, lastfrag,
235 fs32_to_cpu(sb, *p2), uspi->s_fpb - lastblockoff, err);
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 goal = fs32_to_cpu(sb, ufsi->i_u1.i_data[lastblock]) + uspi->s_fpb;
246 tmp = ufs_new_fragments (inode, p, fragment - blockoff,
247 goal, required + blockoff, err);
248 }
249 /*
250 * We will extend last allocated block
251 */
252 else if (lastblock == block) {
253 tmp = ufs_new_fragments (inode, p, fragment - (blockoff - lastblockoff),
254 fs32_to_cpu(sb, *p), required + (blockoff - lastblockoff), err);
255 }
256 /*
257 * We will allocate new block before last allocated block
258 */
259 else /* (lastblock > block) */ {
260 if (lastblock && (tmp = fs32_to_cpu(sb, ufsi->i_u1.i_data[lastblock-1])))
261 goal = tmp + uspi->s_fpb;
262 tmp = ufs_new_fragments (inode, p, fragment - blockoff,
263 goal, uspi->s_fpb, err);
264 }
265 if (!tmp) {
266 if ((!blockoff && *p) ||
267 (blockoff && lastfrag != ufsi->i_lastfrag))
268 goto repeat;
269 *err = -ENOSPC;
270 return NULL;
271 }
272
1da177e4
LT		 273 if (metadata) {
274 result = sb_getblk(inode->i_sb, tmp + blockoff);
c9a27b5d 275 ufs_clear_block(inode, result);
1da177e4 276 } else {
c9a27b5d 277 *phys = tmp + blockoff;
1da177e4
LT		 278 result = NULL;
279 *err = 0;
280 *new = 1;
281 }
282
283 inode->i_ctime = CURRENT_TIME_SEC;
284 if (IS_SYNC(inode))
285 ufs_sync_inode (inode);
286 mark_inode_dirty(inode);
287 UFSD(("EXIT, result %u\n", tmp + blockoff))
288 return result;
289
290 /* This part : To be implemented ....
291 Required only for writing, not required for READ-ONLY.
292ufs2:
293
294 u2_block = ufs_fragstoblks(fragment);
295 u2_blockoff = ufs_fragnum(fragment);
296 p = ufsi->i_u1.u2_i_data + block;
297 goal = 0;
298
299repeat2:
300 tmp = fs32_to_cpu(sb, *p);
301 lastfrag = ufsi->i_lastfrag;
302
303 */
304}
305
306static struct buffer_head * ufs_block_getfrag (struct inode *inode,
307 struct buffer_head *bh, unsigned int fragment, unsigned int new_fragment,
308 unsigned int blocksize, int * err, int metadata, long *phys, int *new)
309{
310 struct super_block * sb;
311 struct ufs_sb_private_info * uspi;
312 struct buffer_head * result;
313 unsigned tmp, goal, block, blockoff;
314 __fs32 * p;
315
316 sb = inode->i_sb;
317 uspi = UFS_SB(sb)->s_uspi;
318 block = ufs_fragstoblks (fragment);
319 blockoff = ufs_fragnum (fragment);
320
321 UFSD(("ENTER, ino %lu, fragment %u, new_fragment %u\n", inode->i_ino, fragment, new_fragment))
322
323 result = NULL;
324 if (!bh)
325 goto out;
326 if (!buffer_uptodate(bh)) {
327 ll_rw_block (READ, 1, &bh);
328 wait_on_buffer (bh);
329 if (!buffer_uptodate(bh))
330 goto out;
331 }
332
333 p = (__fs32 *) bh->b_data + block;
334repeat:
335 tmp = fs32_to_cpu(sb, *p);
336 if (tmp) {
337 if (metadata) {
338 result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff);
339 if (tmp == fs32_to_cpu(sb, *p))
340 goto out;
341 brelse (result);
342 goto repeat;
343 } else {
c9a27b5d 344 *phys = tmp + blockoff;
1da177e4
LT		 345 goto out;
346 }
347 }
348
349 if (block && (tmp = fs32_to_cpu(sb, ((__fs32*)bh->b_data)[block-1]) + uspi->s_fpb))
350 goal = tmp + uspi->s_fpb;
351 else
352 goal = bh->b_blocknr + uspi->s_fpb;
353 tmp = ufs_new_fragments (inode, p, ufs_blknum(new_fragment), goal, uspi->s_fpb, err);
354 if (!tmp) {
355 if (fs32_to_cpu(sb, *p))
356 goto repeat;
357 goto out;
358 }
359
c9a27b5d 360
1da177e4
LT		 361 if (metadata) {
362 result = sb_getblk(sb, tmp + blockoff);
c9a27b5d 363 ufs_clear_block(inode, result);
1da177e4 364 } else {
c9a27b5d 365 *phys = tmp + blockoff;
1da177e4
LT		 366 *new = 1;
367 }
368
369 mark_buffer_dirty(bh);
370 if (IS_SYNC(inode))
371 sync_dirty_buffer(bh);
372 inode->i_ctime = CURRENT_TIME_SEC;
373 mark_inode_dirty(inode);
7b4ee73e 374 UFSD(("result %u\n", tmp + blockoff));
1da177e4
LT		 375out:
376 brelse (bh);
7b4ee73e 377 UFSD(("EXIT\n"));
1da177e4
LT		 378 return result;
379}
380
381/*
382 * This function gets the block which contains the fragment.
383 */
384
09114eb8 385int ufs_getfrag_block (struct inode *inode, sector_t fragment, struct buffer_head *bh_result, int create)
1da177e4
LT		 386{
387 struct super_block * sb = inode->i_sb;
388 struct ufs_sb_private_info * uspi = UFS_SB(sb)->s_uspi;
389 struct buffer_head * bh;
390 int ret, err, new;
391 unsigned long ptr,phys;
392 u64 phys64 = 0;
393
394 if (!create) {
395 phys64 = ufs_frag_map(inode, fragment);
7b4ee73e 396 UFSD(("phys64 = %llu \n",phys64));
1da177e4
LT		 397 if (phys64)
398 map_bh(bh_result, sb, phys64);
399 return 0;
400 }
401
402 /* This code entered only while writing ....? */
403
404 err = -EIO;
405 new = 0;
406 ret = 0;
407 bh = NULL;
408
409 lock_kernel();
410
7b4ee73e 411 UFSD(("ENTER, ino %lu, fragment %llu\n", inode->i_ino, (unsigned long long)fragment))
1da177e4
LT		 412 if (fragment < 0)
413 goto abort_negative;
414 if (fragment >
415 ((UFS_NDADDR + uspi->s_apb + uspi->s_2apb + uspi->s_3apb)
416 << uspi->s_fpbshift))
417 goto abort_too_big;
418
419 err = 0;
420 ptr = fragment;
421
422 /*
423 * ok, these macros clean the logic up a bit and make
424 * it much more readable:
425 */
426#define GET_INODE_DATABLOCK(x) \
427 ufs_inode_getfrag(inode, x, fragment, 1, &err, 0, &phys, &new)
428#define GET_INODE_PTR(x) \
429 ufs_inode_getfrag(inode, x, fragment, uspi->s_fpb, &err, 1, NULL, NULL)
430#define GET_INDIRECT_DATABLOCK(x) \
431 ufs_block_getfrag(inode, bh, x, fragment, sb->s_blocksize, \
432 &err, 0, &phys, &new);
433#define GET_INDIRECT_PTR(x) \
434 ufs_block_getfrag(inode, bh, x, fragment, sb->s_blocksize, \
435 &err, 1, NULL, NULL);
436
437 if (ptr < UFS_NDIR_FRAGMENT) {
438 bh = GET_INODE_DATABLOCK(ptr);
439 goto out;
440 }
441 ptr -= UFS_NDIR_FRAGMENT;
442 if (ptr < (1 << (uspi->s_apbshift + uspi->s_fpbshift))) {
443 bh = GET_INODE_PTR(UFS_IND_FRAGMENT + (ptr >> uspi->s_apbshift));
444 goto get_indirect;
445 }
446 ptr -= 1 << (uspi->s_apbshift + uspi->s_fpbshift);
447 if (ptr < (1 << (uspi->s_2apbshift + uspi->s_fpbshift))) {
448 bh = GET_INODE_PTR(UFS_DIND_FRAGMENT + (ptr >> uspi->s_2apbshift));
449 goto get_double;
450 }
451 ptr -= 1 << (uspi->s_2apbshift + uspi->s_fpbshift);
452 bh = GET_INODE_PTR(UFS_TIND_FRAGMENT + (ptr >> uspi->s_3apbshift));
453 bh = GET_INDIRECT_PTR((ptr >> uspi->s_2apbshift) & uspi->s_apbmask);
454get_double:
455 bh = GET_INDIRECT_PTR((ptr >> uspi->s_apbshift) & uspi->s_apbmask);
456get_indirect:
457 bh = GET_INDIRECT_DATABLOCK(ptr & uspi->s_apbmask);
458
459#undef GET_INODE_DATABLOCK
460#undef GET_INODE_PTR
461#undef GET_INDIRECT_DATABLOCK
462#undef GET_INDIRECT_PTR
463
464out:
465 if (err)
466 goto abort;
467 if (new)
468 set_buffer_new(bh_result);
469 map_bh(bh_result, sb, phys);
470abort:
471 unlock_kernel();
472 return err;
473
474abort_negative:
475 ufs_warning(sb, "ufs_get_block", "block < 0");
476 goto abort;
477
478abort_too_big:
479 ufs_warning(sb, "ufs_get_block", "block > big");
480 goto abort;
481}
482
483struct buffer_head *ufs_getfrag(struct inode *inode, unsigned int fragment,
484 int create, int *err)
485{
486 struct buffer_head dummy;
487 int error;
488
489 dummy.b_state = 0;
490 dummy.b_blocknr = -1000;
491 error = ufs_getfrag_block(inode, fragment, &dummy, create);
492 *err = error;
493 if (!error && buffer_mapped(&dummy)) {
494 struct buffer_head *bh;
495 bh = sb_getblk(inode->i_sb, dummy.b_blocknr);
496 if (buffer_new(&dummy)) {
497 memset(bh->b_data, 0, inode->i_sb->s_blocksize);
498 set_buffer_uptodate(bh);
499 mark_buffer_dirty(bh);
500 }
501 return bh;
502 }
503 return NULL;
504}
505
506struct buffer_head * ufs_bread (struct inode * inode, unsigned fragment,
507 int create, int * err)
508{
509 struct buffer_head * bh;
510
511 UFSD(("ENTER, ino %lu, fragment %u\n", inode->i_ino, fragment))
512 bh = ufs_getfrag (inode, fragment, create, err);
513 if (!bh || buffer_uptodate(bh))
514 return bh;
515 ll_rw_block (READ, 1, &bh);
516 wait_on_buffer (bh);
517 if (buffer_uptodate(bh))
518 return bh;
519 brelse (bh);
520 *err = -EIO;
521 return NULL;
522}
523
524static int ufs_writepage(struct page *page, struct writeback_control *wbc)
525{
526 return block_write_full_page(page,ufs_getfrag_block,wbc);
527}
528static int ufs_readpage(struct file *file, struct page *page)
529{
530 return block_read_full_page(page,ufs_getfrag_block);
531}
532static int ufs_prepare_write(struct file *file, struct page *page, unsigned from, unsigned to)
533{
534 return block_prepare_write(page,from,to,ufs_getfrag_block);
535}
536static sector_t ufs_bmap(struct address_space *mapping, sector_t block)
537{
538 return generic_block_bmap(mapping,block,ufs_getfrag_block);
539}
540struct address_space_operations ufs_aops = {
541 .readpage = ufs_readpage,
542 .writepage = ufs_writepage,
543 .sync_page = block_sync_page,
544 .prepare_write = ufs_prepare_write,
545 .commit_write = generic_commit_write,
546 .bmap = ufs_bmap
547};
548
549void ufs_read_inode (struct inode * inode)
550{
551 struct ufs_inode_info *ufsi = UFS_I(inode);
552 struct super_block * sb;
553 struct ufs_sb_private_info * uspi;
554 struct ufs_inode * ufs_inode;
555 struct ufs2_inode *ufs2_inode;
556 struct buffer_head * bh;
557 mode_t mode;
558 unsigned i;
559 unsigned flags;
560
561 UFSD(("ENTER, ino %lu\n", inode->i_ino))
562
563 sb = inode->i_sb;
564 uspi = UFS_SB(sb)->s_uspi;
565 flags = UFS_SB(sb)->s_flags;
566
567 if (inode->i_ino < UFS_ROOTINO ||
568 inode->i_ino > (uspi->s_ncg * uspi->s_ipg)) {
569 ufs_warning (sb, "ufs_read_inode", "bad inode number (%lu)\n", inode->i_ino);
570 goto bad_inode;
571 }
572
573 bh = sb_bread(sb, uspi->s_sbbase + ufs_inotofsba(inode->i_ino));
574 if (!bh) {
575 ufs_warning (sb, "ufs_read_inode", "unable to read inode %lu\n", inode->i_ino);
576 goto bad_inode;
577 }
578 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
579 goto ufs2_inode;
580
581 ufs_inode = (struct ufs_inode *) (bh->b_data + sizeof(struct ufs_inode) * ufs_inotofsbo(inode->i_ino));
582
583 /*
584 * Copy data to the in-core inode.
585 */
586 inode->i_mode = mode = fs16_to_cpu(sb, ufs_inode->ui_mode);
587 inode->i_nlink = fs16_to_cpu(sb, ufs_inode->ui_nlink);
588 if (inode->i_nlink == 0)
589 ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino);
590
591 /*
592 * Linux now has 32-bit uid and gid, so we can support EFT.
593 */
594 inode->i_uid = ufs_get_inode_uid(sb, ufs_inode);
595 inode->i_gid = ufs_get_inode_gid(sb, ufs_inode);
596
597 inode->i_size = fs64_to_cpu(sb, ufs_inode->ui_size);
598 inode->i_atime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_atime.tv_sec);
599 inode->i_ctime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_ctime.tv_sec);
600 inode->i_mtime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_mtime.tv_sec);
601 inode->i_mtime.tv_nsec = 0;
602 inode->i_atime.tv_nsec = 0;
603 inode->i_ctime.tv_nsec = 0;
604 inode->i_blocks = fs32_to_cpu(sb, ufs_inode->ui_blocks);
605 inode->i_blksize = PAGE_SIZE; /* This is the optimal IO size (for stat) */
606 inode->i_version++;
607 ufsi->i_flags = fs32_to_cpu(sb, ufs_inode->ui_flags);
608 ufsi->i_gen = fs32_to_cpu(sb, ufs_inode->ui_gen);
609 ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow);
610 ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag);
611 ufsi->i_lastfrag = (inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift;
612
613 if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) {
614 for (i = 0; i < (UFS_NDADDR + UFS_NINDIR); i++)
615 ufsi->i_u1.i_data[i] = ufs_inode->ui_u2.ui_addr.ui_db[i];
616 }
617 else {
618 for (i = 0; i < (UFS_NDADDR + UFS_NINDIR) * 4; i++)
619 ufsi->i_u1.i_symlink[i] = ufs_inode->ui_u2.ui_symlink[i];
620 }
621 ufsi->i_osync = 0;
622
623 if (S_ISREG(inode->i_mode)) {
624 inode->i_op = &ufs_file_inode_operations;
625 inode->i_fop = &ufs_file_operations;
626 inode->i_mapping->a_ops = &ufs_aops;
627 } else if (S_ISDIR(inode->i_mode)) {
628 inode->i_op = &ufs_dir_inode_operations;
629 inode->i_fop = &ufs_dir_operations;
630 } else if (S_ISLNK(inode->i_mode)) {
631 if (!inode->i_blocks)
632 inode->i_op = &ufs_fast_symlink_inode_operations;
633 else {
634 inode->i_op = &page_symlink_inode_operations;
635 inode->i_mapping->a_ops = &ufs_aops;
636 }
637 } else
638 init_special_inode(inode, inode->i_mode,
639 ufs_get_inode_dev(sb, ufsi));
640
641 brelse (bh);
642
643 UFSD(("EXIT\n"))
644 return;
645
646bad_inode:
647 make_bad_inode(inode);
648 return;
649
650ufs2_inode :
651 UFSD(("Reading ufs2 inode, ino %lu\n", inode->i_ino))
652
653 ufs2_inode = (struct ufs2_inode *)(bh->b_data + sizeof(struct ufs2_inode) * ufs_inotofsbo(inode->i_ino));
654
655 /*
656 * Copy data to the in-core inode.
657 */
658 inode->i_mode = mode = fs16_to_cpu(sb, ufs2_inode->ui_mode);
659 inode->i_nlink = fs16_to_cpu(sb, ufs2_inode->ui_nlink);
660 if (inode->i_nlink == 0)
661 ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino);
662
663 /*
664 * Linux now has 32-bit uid and gid, so we can support EFT.
665 */
666 inode->i_uid = fs32_to_cpu(sb, ufs2_inode->ui_uid);
667 inode->i_gid = fs32_to_cpu(sb, ufs2_inode->ui_gid);
668
669 inode->i_size = fs64_to_cpu(sb, ufs2_inode->ui_size);
670 inode->i_atime.tv_sec = fs32_to_cpu(sb, ufs2_inode->ui_atime.tv_sec);
671 inode->i_ctime.tv_sec = fs32_to_cpu(sb, ufs2_inode->ui_ctime.tv_sec);
672 inode->i_mtime.tv_sec = fs32_to_cpu(sb, ufs2_inode->ui_mtime.tv_sec);
673 inode->i_mtime.tv_nsec = 0;
674 inode->i_atime.tv_nsec = 0;
675 inode->i_ctime.tv_nsec = 0;
676 inode->i_blocks = fs64_to_cpu(sb, ufs2_inode->ui_blocks);
677 inode->i_blksize = PAGE_SIZE; /*This is the optimal IO size(for stat)*/
678
679 inode->i_version++;
680 ufsi->i_flags = fs32_to_cpu(sb, ufs2_inode->ui_flags);
681 ufsi->i_gen = fs32_to_cpu(sb, ufs2_inode->ui_gen);
682 /*
683 ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow);
684 ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag);
685 */
686 ufsi->i_lastfrag= (inode->i_size + uspi->s_fsize- 1) >> uspi->s_fshift;
687
688 if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) {
689 for (i = 0; i < (UFS_NDADDR + UFS_NINDIR); i++)
690 ufsi->i_u1.u2_i_data[i] =
691 ufs2_inode->ui_u2.ui_addr.ui_db[i];
692 }
693 else {
694 for (i = 0; i < (UFS_NDADDR + UFS_NINDIR) * 4; i++)
695 ufsi->i_u1.i_symlink[i] = ufs2_inode->ui_u2.ui_symlink[i];
696 }
697 ufsi->i_osync = 0;
698
699 if (S_ISREG(inode->i_mode)) {
700 inode->i_op = &ufs_file_inode_operations;
701 inode->i_fop = &ufs_file_operations;
702 inode->i_mapping->a_ops = &ufs_aops;
703 } else if (S_ISDIR(inode->i_mode)) {
704 inode->i_op = &ufs_dir_inode_operations;
705 inode->i_fop = &ufs_dir_operations;
706 } else if (S_ISLNK(inode->i_mode)) {
707 if (!inode->i_blocks)
708 inode->i_op = &ufs_fast_symlink_inode_operations;
709 else {
710 inode->i_op = &page_symlink_inode_operations;
711 inode->i_mapping->a_ops = &ufs_aops;
712 }
713 } else /* TODO : here ...*/
714 init_special_inode(inode, inode->i_mode,
715 ufs_get_inode_dev(sb, ufsi));
716
717 brelse(bh);
718
719 UFSD(("EXIT\n"))
720 return;
721}
722
723static int ufs_update_inode(struct inode * inode, int do_sync)
724{
725 struct ufs_inode_info *ufsi = UFS_I(inode);
726 struct super_block * sb;
727 struct ufs_sb_private_info * uspi;
728 struct buffer_head * bh;
729 struct ufs_inode * ufs_inode;
730 unsigned i;
731 unsigned flags;
732
733 UFSD(("ENTER, ino %lu\n", inode->i_ino))
734
735 sb = inode->i_sb;
736 uspi = UFS_SB(sb)->s_uspi;
737 flags = UFS_SB(sb)->s_flags;
738
739 if (inode->i_ino < UFS_ROOTINO ||
740 inode->i_ino > (uspi->s_ncg * uspi->s_ipg)) {
741 ufs_warning (sb, "ufs_read_inode", "bad inode number (%lu)\n", inode->i_ino);
742 return -1;
743 }
744
745 bh = sb_bread(sb, ufs_inotofsba(inode->i_ino));
746 if (!bh) {
747 ufs_warning (sb, "ufs_read_inode", "unable to read inode %lu\n", inode->i_ino);
748 return -1;
749 }
750 ufs_inode = (struct ufs_inode *) (bh->b_data + ufs_inotofsbo(inode->i_ino) * sizeof(struct ufs_inode));
751
752 ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode);
753 ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink);
754
755 ufs_set_inode_uid(sb, ufs_inode, inode->i_uid);
756 ufs_set_inode_gid(sb, ufs_inode, inode->i_gid);
757
758 ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size);
759 ufs_inode->ui_atime.tv_sec = cpu_to_fs32(sb, inode->i_atime.tv_sec);
760 ufs_inode->ui_atime.tv_usec = 0;
761 ufs_inode->ui_ctime.tv_sec = cpu_to_fs32(sb, inode->i_ctime.tv_sec);
762 ufs_inode->ui_ctime.tv_usec = 0;
763 ufs_inode->ui_mtime.tv_sec = cpu_to_fs32(sb, inode->i_mtime.tv_sec);
764 ufs_inode->ui_mtime.tv_usec = 0;
765 ufs_inode->ui_blocks = cpu_to_fs32(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, ufsi->i_gen);
768
769 if ((flags & UFS_UID_MASK) == UFS_UID_EFT) {
770 ufs_inode->ui_u3.ui_sun.ui_shadow = cpu_to_fs32(sb, ufsi->i_shadow);
771 ufs_inode->ui_u3.ui_sun.ui_oeftflag = cpu_to_fs32(sb, ufsi->i_oeftflag);
772 }
773
774 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
775 /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */
776 ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.i_data[0];
777 } else if (inode->i_blocks) {
778 for (i = 0; i < (UFS_NDADDR + UFS_NINDIR); i++)
779 ufs_inode->ui_u2.ui_addr.ui_db[i] = ufsi->i_u1.i_data[i];
780 }
781 else {
782 for (i = 0; i < (UFS_NDADDR + UFS_NINDIR) * 4; i++)
783 ufs_inode->ui_u2.ui_symlink[i] = ufsi->i_u1.i_symlink[i];
784 }
785
786 if (!inode->i_nlink)
787 memset (ufs_inode, 0, sizeof(struct ufs_inode));
788
789 mark_buffer_dirty(bh);
790 if (do_sync)
791 sync_dirty_buffer(bh);
792 brelse (bh);
793
794 UFSD(("EXIT\n"))
795 return 0;
796}
797
798int ufs_write_inode (struct inode * inode, int wait)
799{
800 int ret;
801 lock_kernel();
802 ret = ufs_update_inode (inode, wait);
803 unlock_kernel();
804 return ret;
805}
806
807int ufs_sync_inode (struct inode *inode)
808{
809 return ufs_update_inode (inode, 1);
810}
811
812void ufs_delete_inode (struct inode * inode)
813{
fef26658 814 truncate_inode_pages(&inode->i_data, 0);
1da177e4
LT		 815 /*UFS_I(inode)->i_dtime = CURRENT_TIME;*/
816 lock_kernel();
817 mark_inode_dirty(inode);
818 ufs_update_inode(inode, IS_SYNC(inode));
819 inode->i_size = 0;
820 if (inode->i_blocks)
821 ufs_truncate (inode);
822 ufs_free_inode (inode);
823 unlock_kernel();
824}
kernel source for telekom puls (alcatel/mediatek)