xref: /openbmc/linux/fs/ufs/inode.c (revision 82003e04)
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 
44 static 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 
76 typedef struct {
77 	void	*p;
78 	union {
79 		__fs32	key32;
80 		__fs64	key64;
81 	};
82 	struct buffer_head *bh;
83 } Indirect;
84 
85 static 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 
101 static 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 
122 static 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 
141 again:
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 
169 ufs2:
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);
191 found:
192 	res += uspi->s_sbbase;
193 no_block:
194 	while (q > chain) {
195 		brelse(q->bh);
196 		q--;
197 	}
198 	return res;
199 
200 changed:
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  */
218 static bool
219 ufs_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  */
251 static u64
252 ufs_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);
300 out:
301 	return tmp + uspi->s_sbbase;
302 
303      /* This part : To be implemented ....
304         Required only for writing, not required for READ-ONLY.
305 ufs2:
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 
312 repeat2:
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  */
330 static u64
331 ufs_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);
380 out:
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 
393 static 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 	}
442 out:
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 
453 static int ufs_writepage(struct page *page, struct writeback_control *wbc)
454 {
455 	return block_write_full_page(page,ufs_getfrag_block,wbc);
456 }
457 
458 static int ufs_readpage(struct file *file, struct page *page)
459 {
460 	return block_read_full_page(page,ufs_getfrag_block);
461 }
462 
463 int 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 
468 static void ufs_truncate_blocks(struct inode *);
469 
470 static 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 
480 static 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 
494 static 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 
506 static sector_t ufs_bmap(struct address_space *mapping, sector_t block)
507 {
508 	return generic_block_bmap(mapping,block,ufs_getfrag_block);
509 }
510 
511 const 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 
519 static 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 
543 static 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 
590 static 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 
639 struct 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 
697 bad_inode:
698 	iget_failed(inode);
699 	return ERR_PTR(-EIO);
700 }
701 
702 static 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 
745 static 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 
785 static 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 
824 int 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 
829 int ufs_sync_inode (struct inode *inode)
830 {
831 	return ufs_update_inode (inode, 1);
832 }
833 
834 void 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 
855 struct to_free {
856 	struct inode *inode;
857 	u64 to;
858 	unsigned count;
859 };
860 
861 static 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 
874 static 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 
923 next1:
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 
962 static 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 
995 static 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 
1034 static 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 	       unmap_underlying_metadata(bh->b_bdev,
1074 					 bh->b_blocknr);
1075 	       /*
1076 		* we do not zeroize fragment, because of
1077 		* if it maped to hole, it already contains zeroes
1078 		*/
1079 	       set_buffer_uptodate(bh);
1080 	       mark_buffer_dirty(bh);
1081 	       set_page_dirty(lastpage);
1082        }
1083 
1084        if (lastfrag >= UFS_IND_FRAGMENT) {
1085 	       end = uspi->s_fpb - ufs_fragnum(lastfrag) - 1;
1086 	       phys64 = bh->b_blocknr + 1;
1087 	       for (i = 0; i < end; ++i) {
1088 		       bh = sb_getblk(sb, i + phys64);
1089 		       lock_buffer(bh);
1090 		       memset(bh->b_data, 0, sb->s_blocksize);
1091 		       set_buffer_uptodate(bh);
1092 		       mark_buffer_dirty(bh);
1093 		       unlock_buffer(bh);
1094 		       sync_dirty_buffer(bh);
1095 		       brelse(bh);
1096 	       }
1097        }
1098 out_unlock:
1099        ufs_put_locked_page(lastpage);
1100 out:
1101        return err;
1102 }
1103 
1104 static void __ufs_truncate_blocks(struct inode *inode)
1105 {
1106 	struct ufs_inode_info *ufsi = UFS_I(inode);
1107 	struct super_block *sb = inode->i_sb;
1108 	struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
1109 	unsigned offsets[4];
1110 	int depth = ufs_block_to_path(inode, DIRECT_BLOCK, offsets);
1111 	int depth2;
1112 	unsigned i;
1113 	struct ufs_buffer_head *ubh[3];
1114 	void *p;
1115 	u64 block;
1116 
1117 	if (!depth)
1118 		return;
1119 
1120 	/* find the last non-zero in offsets[] */
1121 	for (depth2 = depth - 1; depth2; depth2--)
1122 		if (offsets[depth2])
1123 			break;
1124 
1125 	mutex_lock(&ufsi->truncate_mutex);
1126 	if (depth == 1) {
1127 		ufs_trunc_direct(inode);
1128 		offsets[0] = UFS_IND_BLOCK;
1129 	} else {
1130 		/* get the blocks that should be partially emptied */
1131 		p = ufs_get_direct_data_ptr(uspi, ufsi, offsets[0]);
1132 		for (i = 0; i < depth2; i++) {
1133 			offsets[i]++;	/* next branch is fully freed */
1134 			block = ufs_data_ptr_to_cpu(sb, p);
1135 			if (!block)
1136 				break;
1137 			ubh[i] = ubh_bread(sb, block, uspi->s_bsize);
1138 			if (!ubh[i]) {
1139 				write_seqlock(&ufsi->meta_lock);
1140 				ufs_data_ptr_clear(uspi, p);
1141 				write_sequnlock(&ufsi->meta_lock);
1142 				break;
1143 			}
1144 			p = ubh_get_data_ptr(uspi, ubh[i], offsets[i + 1]);
1145 		}
1146 		while (i--)
1147 			free_branch_tail(inode, offsets[i + 1], ubh[i], depth - i - 1);
1148 	}
1149 	for (i = offsets[0]; i <= UFS_TIND_BLOCK; i++) {
1150 		p = ufs_get_direct_data_ptr(uspi, ufsi, i);
1151 		block = ufs_data_ptr_to_cpu(sb, p);
1152 		if (block) {
1153 			write_seqlock(&ufsi->meta_lock);
1154 			ufs_data_ptr_clear(uspi, p);
1155 			write_sequnlock(&ufsi->meta_lock);
1156 			free_full_branch(inode, block, i - UFS_IND_BLOCK + 1);
1157 		}
1158 	}
1159 	ufsi->i_lastfrag = DIRECT_FRAGMENT;
1160 	mark_inode_dirty(inode);
1161 	mutex_unlock(&ufsi->truncate_mutex);
1162 }
1163 
1164 static int ufs_truncate(struct inode *inode, loff_t size)
1165 {
1166 	int err = 0;
1167 
1168 	UFSD("ENTER: ino %lu, i_size: %llu, old_i_size: %llu\n",
1169 	     inode->i_ino, (unsigned long long)size,
1170 	     (unsigned long long)i_size_read(inode));
1171 
1172 	if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
1173 	      S_ISLNK(inode->i_mode)))
1174 		return -EINVAL;
1175 	if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
1176 		return -EPERM;
1177 
1178 	err = ufs_alloc_lastblock(inode, size);
1179 
1180 	if (err)
1181 		goto out;
1182 
1183 	block_truncate_page(inode->i_mapping, size, ufs_getfrag_block);
1184 
1185 	truncate_setsize(inode, size);
1186 
1187 	__ufs_truncate_blocks(inode);
1188 	inode->i_mtime = inode->i_ctime = current_time(inode);
1189 	mark_inode_dirty(inode);
1190 out:
1191 	UFSD("EXIT: err %d\n", err);
1192 	return err;
1193 }
1194 
1195 void ufs_truncate_blocks(struct inode *inode)
1196 {
1197 	if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
1198 	      S_ISLNK(inode->i_mode)))
1199 		return;
1200 	if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
1201 		return;
1202 	__ufs_truncate_blocks(inode);
1203 }
1204 
1205 int ufs_setattr(struct dentry *dentry, struct iattr *attr)
1206 {
1207 	struct inode *inode = d_inode(dentry);
1208 	unsigned int ia_valid = attr->ia_valid;
1209 	int error;
1210 
1211 	error = setattr_prepare(dentry, attr);
1212 	if (error)
1213 		return error;
1214 
1215 	if (ia_valid & ATTR_SIZE && attr->ia_size != inode->i_size) {
1216 		error = ufs_truncate(inode, attr->ia_size);
1217 		if (error)
1218 			return error;
1219 	}
1220 
1221 	setattr_copy(inode, attr);
1222 	mark_inode_dirty(inode);
1223 	return 0;
1224 }
1225 
1226 const struct inode_operations ufs_file_inode_operations = {
1227 	.setattr = ufs_setattr,
1228 };
1229