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
45 static u64 ufs_frag_map(struct inode *inode, sector_t frag, bool needs_lock);
46
ufs_block_to_path(struct inode * inode,sector_t i_block,sector_t offsets[4])47 static 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
ufs_frag_map(struct inode * inode,sector_t frag,bool needs_lock)84 static 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;
131 ufs2:
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
154 out:
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 */
173 static struct buffer_head *
ufs_inode_getfrag(struct inode * inode,u64 fragment,sector_t new_fragment,unsigned int required,int * err,long * phys,int * new,struct page * locked_page)174 ufs_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
201 repeat:
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.
303 ufs2:
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
310 repeat2:
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 */
330 static struct buffer_head *
ufs_inode_getblock(struct inode * inode,struct buffer_head * bh,u64 fragment,sector_t new_fragment,int * err,long * phys,int * new,struct page * locked_page)331 ufs_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;
362 repeat:
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);
405 out:
406 brelse (bh);
407 UFSD("EXIT\n");
408 return result;
409 }
410
411 /**
412 * ufs_getfrag_bloc() - `get_block_t' function, interface between UFS and
413 * readpage, writepage and so on
414 */
415
ufs_getfrag_block(struct inode * inode,sector_t fragment,struct buffer_head * bh_result,int create)416 int 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);
488 get_double:
489 bh = GET_INDIRECT_PTR((ptr >> uspi->s_apbshift) & uspi->s_apbmask);
490 get_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
498 out:
499 if (err)
500 goto abort;
501 if (new)
502 set_buffer_new(bh_result);
503 map_bh(bh_result, sb, phys);
504 abort:
505 if (needs_lock)
506 unlock_ufs(sb);
507
508 return err;
509
510 abort_too_big:
511 ufs_warning(sb, "ufs_get_block", "block > big");
512 goto abort;
513 }
514
ufs_writepage(struct page * page,struct writeback_control * wbc)515 static int ufs_writepage(struct page *page, struct writeback_control *wbc)
516 {
517 return block_write_full_page(page,ufs_getfrag_block,wbc);
518 }
519
ufs_readpage(struct file * file,struct page * page)520 static int ufs_readpage(struct file *file, struct page *page)
521 {
522 return block_read_full_page(page,ufs_getfrag_block);
523 }
524
ufs_prepare_chunk(struct page * page,loff_t pos,unsigned len)525 int 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
ufs_write_begin(struct file * file,struct address_space * mapping,loff_t pos,unsigned len,unsigned flags,struct page ** pagep,void ** fsdata)530 static 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
ufs_bmap(struct address_space * mapping,sector_t block)547 static sector_t ufs_bmap(struct address_space *mapping, sector_t block)
548 {
549 return generic_block_bmap(mapping,block,ufs_getfrag_block);
550 }
551
552 const 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
ufs_set_inode_ops(struct inode * inode)560 static 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
ufs1_read_inode(struct inode * inode,struct ufs_inode * ufs_inode)582 static 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
ufs2_read_inode(struct inode * inode,struct ufs2_inode * ufs2_inode)629 static 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
ufs_iget(struct super_block * sb,unsigned long ino)678 struct 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
736 bad_inode:
737 iget_failed(inode);
738 return ERR_PTR(-EIO);
739 }
740
ufs1_update_inode(struct inode * inode,struct ufs_inode * ufs_inode)741 static 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
ufs2_update_inode(struct inode * inode,struct ufs2_inode * ufs_inode)784 static 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
ufs_update_inode(struct inode * inode,int do_sync)824 static 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
ufs_write_inode(struct inode * inode,struct writeback_control * wbc)863 int 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
ufs_sync_inode(struct inode * inode)872 int ufs_sync_inode (struct inode *inode)
873 {
874 return ufs_update_inode (inode, 1);
875 }
876
ufs_evict_inode(struct inode * inode)877 void 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 }
907