5 * Daniel Pirkl <daniel.pirkl@email.cz>
6 * Charles University, Faculty of Mathematics and Physics
10 * linux/fs/ext2/inode.c
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)
19 * linux/fs/minix/inode.c
21 * Copyright (C) 1991, 1992 Linus Torvalds
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
28 #include <asm/uaccess.h>
30 #include <linux/errno.h>
32 #include <linux/time.h>
33 #include <linux/stat.h>
34 #include <linux/string.h>
36 #include <linux/buffer_head.h>
37 #include <linux/writeback.h>
44 static int ufs_block_to_path(struct inode *inode, sector_t i_block, unsigned offsets[4])
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));
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);
71 ufs_warning(inode->i_sb, "ufs_block_to_path", "block > big");
82 struct buffer_head *bh;
85 static inline int grow_chain32(struct ufs_inode_info *ufsi,
86 struct buffer_head *bh, __fs32 *v,
87 Indirect *from, Indirect *to)
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++)
97 } while (read_seqretry(&ufsi->meta_lock, seq));
101 static inline int grow_chain64(struct ufs_inode_info *ufsi,
102 struct buffer_head *bh, __fs64 *v,
103 Indirect *from, Indirect *to)
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++)
113 } while (read_seqretry(&ufsi->meta_lock, seq));
118 * Returns the location of the fragment from
119 * the beginning of the filesystem.
122 static u64 ufs_frag_map(struct inode *inode, unsigned offsets[4], int depth)
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;
131 unsigned flags = UFS_SB(sb)->s_flags;
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);
144 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
147 if (!grow_chain32(ufsi, NULL, &ufsi->i_u1.i_data[*p++], chain, q))
153 struct buffer_head *bh;
156 bh = sb_bread(sb, uspi->s_sbbase +
157 fs32_to_cpu(sb, q->key32) + (n>>shift));
160 ptr = (__fs32 *)bh->b_data + (n & mask);
161 if (!grow_chain32(ufsi, bh, ptr, chain, ++q))
166 res = fs32_to_cpu(sb, q->key32);
170 if (!grow_chain64(ufsi, NULL, &ufsi->i_u1.u2_i_data[*p++], chain, q))
177 struct buffer_head *bh;
180 bh = sb_bread(sb, uspi->s_sbbase +
181 fs64_to_cpu(sb, q->key64) + (n>>shift));
184 ptr = (__fs64 *)bh->b_data + (n & mask);
185 if (!grow_chain64(ufsi, bh, ptr, chain, ++q))
190 res = fs64_to_cpu(sb, q->key64);
192 res += uspi->s_sbbase;
209 * ufs_inode_getfrag() - allocate new fragment(s)
210 * @inode: pointer to inode
211 * @fragment: number of `fragment' which hold pointer
212 * to new allocated fragment(s)
213 * @new_fragment: number of new allocated fragment(s)
214 * @required: how many fragment(s) we require
215 * @err: we set it if something wrong
216 * @phys: pointer to where we save physical number of new allocated fragments,
217 * NULL if we allocate not data(indirect blocks for example).
218 * @new: we set it if we allocate new block
219 * @locked_page: for ufs_new_fragments()
221 static struct buffer_head *
222 ufs_inode_getfrag(struct inode *inode, u64 fragment,
223 sector_t new_fragment, unsigned int required, int *err,
224 long *phys, int *new, struct page *locked_page)
226 struct ufs_inode_info *ufsi = UFS_I(inode);
227 struct super_block *sb = inode->i_sb;
228 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
229 struct buffer_head * result;
230 unsigned blockoff, lastblockoff;
231 u64 tmp, goal, lastfrag, block, lastblock;
234 UFSD("ENTER, ino %lu, fragment %llu, new_fragment %llu, required %u, "
235 "metadata %d\n", inode->i_ino, (unsigned long long)fragment,
236 (unsigned long long)new_fragment, required, !phys);
238 /* TODO : to be done for write support
239 if ( (flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
243 block = ufs_fragstoblks (fragment);
244 blockoff = ufs_fragnum (fragment);
245 p = ufs_get_direct_data_ptr(uspi, ufsi, block);
249 tmp = ufs_data_ptr_to_cpu(sb, p);
251 lastfrag = ufsi->i_lastfrag;
252 if (tmp && fragment < lastfrag) {
254 return sb_getblk(sb, uspi->s_sbbase + tmp + blockoff);
256 *phys = uspi->s_sbbase + tmp + blockoff;
261 lastblock = ufs_fragstoblks (lastfrag);
262 lastblockoff = ufs_fragnum (lastfrag);
264 * We will extend file into new block beyond last allocated block
266 if (lastblock < block) {
268 * We must reallocate last allocated block
271 p2 = ufs_get_direct_data_ptr(uspi, ufsi, lastblock);
272 tmp = ufs_new_fragments(inode, p2, lastfrag,
273 ufs_data_ptr_to_cpu(sb, p2),
274 uspi->s_fpb - lastblockoff,
278 lastfrag = ufsi->i_lastfrag;
280 tmp = ufs_data_ptr_to_cpu(sb,
281 ufs_get_direct_data_ptr(uspi, ufsi,
284 goal = tmp + uspi->s_fpb;
285 tmp = ufs_new_fragments (inode, p, fragment - blockoff,
286 goal, required + blockoff,
288 phys != NULL ? locked_page : NULL);
289 } else if (lastblock == block) {
291 * We will extend last allocated block
293 tmp = ufs_new_fragments(inode, p, fragment -
294 (blockoff - lastblockoff),
295 ufs_data_ptr_to_cpu(sb, p),
296 required + (blockoff - lastblockoff),
297 err, phys != NULL ? locked_page : NULL);
298 } else /* (lastblock > block) */ {
300 * We will allocate new block before last allocated block
303 tmp = ufs_data_ptr_to_cpu(sb,
304 ufs_get_direct_data_ptr(uspi, ufsi, block - 1));
306 goal = tmp + uspi->s_fpb;
308 tmp = ufs_new_fragments(inode, p, fragment - blockoff,
309 goal, uspi->s_fpb, err,
310 phys != NULL ? locked_page : NULL);
318 result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff);
320 *phys = uspi->s_sbbase + tmp + blockoff;
326 inode->i_ctime = CURRENT_TIME_SEC;
328 ufs_sync_inode (inode);
329 mark_inode_dirty(inode);
332 /* This part : To be implemented ....
333 Required only for writing, not required for READ-ONLY.
336 u2_block = ufs_fragstoblks(fragment);
337 u2_blockoff = ufs_fragnum(fragment);
338 p = ufsi->i_u1.u2_i_data + block;
342 tmp = fs32_to_cpu(sb, *p);
343 lastfrag = ufsi->i_lastfrag;
349 * ufs_inode_getblock() - allocate new block
350 * @inode: pointer to inode
351 * @bh: pointer to block which hold "pointer" to new allocated block
352 * @fragment: number of `fragment' which hold pointer
353 * to new allocated block
354 * @new_fragment: number of new allocated fragment
355 * (block will hold this fragment and also uspi->s_fpb-1)
356 * @err: see ufs_inode_getfrag()
357 * @phys: see ufs_inode_getfrag()
358 * @new: see ufs_inode_getfrag()
359 * @locked_page: see ufs_inode_getfrag()
361 static struct buffer_head *
362 ufs_inode_getblock(struct inode *inode, struct buffer_head *bh,
363 u64 fragment, sector_t new_fragment, int *err,
364 long *phys, int *new, struct page *locked_page)
366 struct super_block *sb = inode->i_sb;
367 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
368 struct buffer_head * result;
370 u64 tmp, goal, block;
373 block = ufs_fragstoblks (fragment);
374 blockoff = ufs_fragnum (fragment);
376 UFSD("ENTER, ino %lu, fragment %llu, new_fragment %llu, metadata %d\n",
377 inode->i_ino, (unsigned long long)fragment,
378 (unsigned long long)new_fragment, !phys);
383 if (!buffer_uptodate(bh)) {
384 ll_rw_block (READ, 1, &bh);
386 if (!buffer_uptodate(bh))
389 if (uspi->fs_magic == UFS2_MAGIC)
390 p = (__fs64 *)bh->b_data + block;
392 p = (__fs32 *)bh->b_data + block;
394 tmp = ufs_data_ptr_to_cpu(sb, p);
397 result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff);
399 *phys = uspi->s_sbbase + tmp + blockoff;
403 if (block && (uspi->fs_magic == UFS2_MAGIC ?
404 (tmp = fs64_to_cpu(sb, ((__fs64 *)bh->b_data)[block-1])) :
405 (tmp = fs32_to_cpu(sb, ((__fs32 *)bh->b_data)[block-1]))))
406 goal = tmp + uspi->s_fpb;
408 goal = bh->b_blocknr + uspi->s_fpb;
409 tmp = ufs_new_fragments(inode, p, ufs_blknum(new_fragment), goal,
410 uspi->s_fpb, err, locked_page);
415 result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff);
417 *phys = uspi->s_sbbase + tmp + blockoff;
421 mark_buffer_dirty(bh);
423 sync_dirty_buffer(bh);
424 inode->i_ctime = CURRENT_TIME_SEC;
425 mark_inode_dirty(inode);
433 * ufs_getfrag_block() - `get_block_t' function, interface between UFS and
434 * readpage, writepage and so on
437 static int ufs_getfrag_block(struct inode *inode, sector_t fragment, struct buffer_head *bh_result, int create)
439 struct super_block * sb = inode->i_sb;
440 struct ufs_sb_info * sbi = UFS_SB(sb);
441 struct ufs_sb_private_info * uspi = sbi->s_uspi;
442 struct buffer_head * bh;
445 int depth = ufs_block_to_path(inode, fragment >> uspi->s_fpbshift, offsets);
446 unsigned long ptr,phys;
450 phys64 = ufs_frag_map(inode, offsets, depth);
452 phys64 += fragment & uspi->s_fpbmask;
453 map_bh(bh_result, sb, phys64);
458 /* This code entered only while writing ....? */
465 mutex_lock(&UFS_I(inode)->truncate_mutex);
467 UFSD("ENTER, ino %lu, fragment %llu\n", inode->i_ino, (unsigned long long)fragment);
475 * ok, these macros clean the logic up a bit and make
476 * it much more readable:
478 #define GET_INODE_DATABLOCK(x) \
479 ufs_inode_getfrag(inode, x, fragment, 1, &err, &phys, &new,\
481 #define GET_INODE_PTR(x) \
482 ufs_inode_getfrag(inode, x, fragment, uspi->s_fpb, &err, NULL, NULL,\
484 #define GET_INDIRECT_DATABLOCK(x) \
485 ufs_inode_getblock(inode, bh, x, fragment, \
486 &err, &phys, &new, bh_result->b_page)
487 #define GET_INDIRECT_PTR(x) \
488 ufs_inode_getblock(inode, bh, x, fragment, \
489 &err, NULL, NULL, NULL)
492 bh = GET_INODE_DATABLOCK(ptr);
495 ptr -= UFS_NDIR_FRAGMENT;
497 bh = GET_INODE_PTR(UFS_IND_FRAGMENT + (ptr >> uspi->s_apbshift));
500 ptr -= 1 << (uspi->s_apbshift + uspi->s_fpbshift);
502 bh = GET_INODE_PTR(UFS_DIND_FRAGMENT + (ptr >> uspi->s_2apbshift));
505 ptr -= 1 << (uspi->s_2apbshift + uspi->s_fpbshift);
506 bh = GET_INODE_PTR(UFS_TIND_FRAGMENT + (ptr >> uspi->s_3apbshift));
507 bh = GET_INDIRECT_PTR((ptr >> uspi->s_2apbshift) & uspi->s_apbmask);
509 bh = GET_INDIRECT_PTR((ptr >> uspi->s_apbshift) & uspi->s_apbmask);
511 bh = GET_INDIRECT_DATABLOCK(ptr & uspi->s_apbmask);
513 #undef GET_INODE_DATABLOCK
515 #undef GET_INDIRECT_DATABLOCK
516 #undef GET_INDIRECT_PTR
522 set_buffer_new(bh_result);
523 map_bh(bh_result, sb, phys);
525 mutex_unlock(&UFS_I(inode)->truncate_mutex);
530 ufs_warning(sb, "ufs_get_block", "block > big");
534 static int ufs_writepage(struct page *page, struct writeback_control *wbc)
536 return block_write_full_page(page,ufs_getfrag_block,wbc);
539 static int ufs_readpage(struct file *file, struct page *page)
541 return block_read_full_page(page,ufs_getfrag_block);
544 int ufs_prepare_chunk(struct page *page, loff_t pos, unsigned len)
546 return __block_write_begin(page, pos, len, ufs_getfrag_block);
549 static void ufs_truncate_blocks(struct inode *);
551 static void ufs_write_failed(struct address_space *mapping, loff_t to)
553 struct inode *inode = mapping->host;
555 if (to > inode->i_size) {
556 truncate_pagecache(inode, inode->i_size);
557 ufs_truncate_blocks(inode);
561 static int ufs_write_begin(struct file *file, struct address_space *mapping,
562 loff_t pos, unsigned len, unsigned flags,
563 struct page **pagep, void **fsdata)
567 ret = block_write_begin(mapping, pos, len, flags, pagep,
570 ufs_write_failed(mapping, pos + len);
575 static int ufs_write_end(struct file *file, struct address_space *mapping,
576 loff_t pos, unsigned len, unsigned copied,
577 struct page *page, void *fsdata)
581 ret = generic_write_end(file, mapping, pos, len, copied, page, fsdata);
583 ufs_write_failed(mapping, pos + len);
587 static sector_t ufs_bmap(struct address_space *mapping, sector_t block)
589 return generic_block_bmap(mapping,block,ufs_getfrag_block);
592 const struct address_space_operations ufs_aops = {
593 .readpage = ufs_readpage,
594 .writepage = ufs_writepage,
595 .write_begin = ufs_write_begin,
596 .write_end = ufs_write_end,
600 static void ufs_set_inode_ops(struct inode *inode)
602 if (S_ISREG(inode->i_mode)) {
603 inode->i_op = &ufs_file_inode_operations;
604 inode->i_fop = &ufs_file_operations;
605 inode->i_mapping->a_ops = &ufs_aops;
606 } else if (S_ISDIR(inode->i_mode)) {
607 inode->i_op = &ufs_dir_inode_operations;
608 inode->i_fop = &ufs_dir_operations;
609 inode->i_mapping->a_ops = &ufs_aops;
610 } else if (S_ISLNK(inode->i_mode)) {
611 if (!inode->i_blocks) {
612 inode->i_op = &ufs_fast_symlink_inode_operations;
613 inode->i_link = (char *)UFS_I(inode)->i_u1.i_symlink;
615 inode->i_op = &ufs_symlink_inode_operations;
616 inode->i_mapping->a_ops = &ufs_aops;
619 init_special_inode(inode, inode->i_mode,
620 ufs_get_inode_dev(inode->i_sb, UFS_I(inode)));
623 static int ufs1_read_inode(struct inode *inode, struct ufs_inode *ufs_inode)
625 struct ufs_inode_info *ufsi = UFS_I(inode);
626 struct super_block *sb = inode->i_sb;
630 * Copy data to the in-core inode.
632 inode->i_mode = mode = fs16_to_cpu(sb, ufs_inode->ui_mode);
633 set_nlink(inode, fs16_to_cpu(sb, ufs_inode->ui_nlink));
634 if (inode->i_nlink == 0) {
635 ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino);
640 * Linux now has 32-bit uid and gid, so we can support EFT.
642 i_uid_write(inode, ufs_get_inode_uid(sb, ufs_inode));
643 i_gid_write(inode, ufs_get_inode_gid(sb, ufs_inode));
645 inode->i_size = fs64_to_cpu(sb, ufs_inode->ui_size);
646 inode->i_atime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_atime.tv_sec);
647 inode->i_ctime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_ctime.tv_sec);
648 inode->i_mtime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_mtime.tv_sec);
649 inode->i_mtime.tv_nsec = 0;
650 inode->i_atime.tv_nsec = 0;
651 inode->i_ctime.tv_nsec = 0;
652 inode->i_blocks = fs32_to_cpu(sb, ufs_inode->ui_blocks);
653 inode->i_generation = fs32_to_cpu(sb, ufs_inode->ui_gen);
654 ufsi->i_flags = fs32_to_cpu(sb, ufs_inode->ui_flags);
655 ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow);
656 ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag);
659 if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) {
660 memcpy(ufsi->i_u1.i_data, &ufs_inode->ui_u2.ui_addr,
661 sizeof(ufs_inode->ui_u2.ui_addr));
663 memcpy(ufsi->i_u1.i_symlink, ufs_inode->ui_u2.ui_symlink,
664 sizeof(ufs_inode->ui_u2.ui_symlink) - 1);
665 ufsi->i_u1.i_symlink[sizeof(ufs_inode->ui_u2.ui_symlink) - 1] = 0;
670 static int ufs2_read_inode(struct inode *inode, struct ufs2_inode *ufs2_inode)
672 struct ufs_inode_info *ufsi = UFS_I(inode);
673 struct super_block *sb = inode->i_sb;
676 UFSD("Reading ufs2 inode, ino %lu\n", inode->i_ino);
678 * Copy data to the in-core inode.
680 inode->i_mode = mode = fs16_to_cpu(sb, ufs2_inode->ui_mode);
681 set_nlink(inode, fs16_to_cpu(sb, ufs2_inode->ui_nlink));
682 if (inode->i_nlink == 0) {
683 ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino);
688 * Linux now has 32-bit uid and gid, so we can support EFT.
690 i_uid_write(inode, fs32_to_cpu(sb, ufs2_inode->ui_uid));
691 i_gid_write(inode, fs32_to_cpu(sb, ufs2_inode->ui_gid));
693 inode->i_size = fs64_to_cpu(sb, ufs2_inode->ui_size);
694 inode->i_atime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_atime);
695 inode->i_ctime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_ctime);
696 inode->i_mtime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_mtime);
697 inode->i_atime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_atimensec);
698 inode->i_ctime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_ctimensec);
699 inode->i_mtime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_mtimensec);
700 inode->i_blocks = fs64_to_cpu(sb, ufs2_inode->ui_blocks);
701 inode->i_generation = fs32_to_cpu(sb, ufs2_inode->ui_gen);
702 ufsi->i_flags = fs32_to_cpu(sb, ufs2_inode->ui_flags);
704 ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow);
705 ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag);
708 if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) {
709 memcpy(ufsi->i_u1.u2_i_data, &ufs2_inode->ui_u2.ui_addr,
710 sizeof(ufs2_inode->ui_u2.ui_addr));
712 memcpy(ufsi->i_u1.i_symlink, ufs2_inode->ui_u2.ui_symlink,
713 sizeof(ufs2_inode->ui_u2.ui_symlink) - 1);
714 ufsi->i_u1.i_symlink[sizeof(ufs2_inode->ui_u2.ui_symlink) - 1] = 0;
719 struct inode *ufs_iget(struct super_block *sb, unsigned long ino)
721 struct ufs_inode_info *ufsi;
722 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
723 struct buffer_head * bh;
727 UFSD("ENTER, ino %lu\n", ino);
729 if (ino < UFS_ROOTINO || ino > (uspi->s_ncg * uspi->s_ipg)) {
730 ufs_warning(sb, "ufs_read_inode", "bad inode number (%lu)\n",
732 return ERR_PTR(-EIO);
735 inode = iget_locked(sb, ino);
737 return ERR_PTR(-ENOMEM);
738 if (!(inode->i_state & I_NEW))
743 bh = sb_bread(sb, uspi->s_sbbase + ufs_inotofsba(inode->i_ino));
745 ufs_warning(sb, "ufs_read_inode", "unable to read inode %lu\n",
749 if ((UFS_SB(sb)->s_flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
750 struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data;
752 err = ufs2_read_inode(inode,
753 ufs2_inode + ufs_inotofsbo(inode->i_ino));
755 struct ufs_inode *ufs_inode = (struct ufs_inode *)bh->b_data;
757 err = ufs1_read_inode(inode,
758 ufs_inode + ufs_inotofsbo(inode->i_ino));
765 (inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift;
766 ufsi->i_dir_start_lookup = 0;
769 ufs_set_inode_ops(inode);
774 unlock_new_inode(inode);
779 return ERR_PTR(-EIO);
782 static void ufs1_update_inode(struct inode *inode, struct ufs_inode *ufs_inode)
784 struct super_block *sb = inode->i_sb;
785 struct ufs_inode_info *ufsi = UFS_I(inode);
787 ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode);
788 ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink);
790 ufs_set_inode_uid(sb, ufs_inode, i_uid_read(inode));
791 ufs_set_inode_gid(sb, ufs_inode, i_gid_read(inode));
793 ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size);
794 ufs_inode->ui_atime.tv_sec = cpu_to_fs32(sb, inode->i_atime.tv_sec);
795 ufs_inode->ui_atime.tv_usec = 0;
796 ufs_inode->ui_ctime.tv_sec = cpu_to_fs32(sb, inode->i_ctime.tv_sec);
797 ufs_inode->ui_ctime.tv_usec = 0;
798 ufs_inode->ui_mtime.tv_sec = cpu_to_fs32(sb, inode->i_mtime.tv_sec);
799 ufs_inode->ui_mtime.tv_usec = 0;
800 ufs_inode->ui_blocks = cpu_to_fs32(sb, inode->i_blocks);
801 ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags);
802 ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation);
804 if ((UFS_SB(sb)->s_flags & UFS_UID_MASK) == UFS_UID_EFT) {
805 ufs_inode->ui_u3.ui_sun.ui_shadow = cpu_to_fs32(sb, ufsi->i_shadow);
806 ufs_inode->ui_u3.ui_sun.ui_oeftflag = cpu_to_fs32(sb, ufsi->i_oeftflag);
809 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
810 /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */
811 ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.i_data[0];
812 } else if (inode->i_blocks) {
813 memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.i_data,
814 sizeof(ufs_inode->ui_u2.ui_addr));
817 memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink,
818 sizeof(ufs_inode->ui_u2.ui_symlink));
822 memset (ufs_inode, 0, sizeof(struct ufs_inode));
825 static void ufs2_update_inode(struct inode *inode, struct ufs2_inode *ufs_inode)
827 struct super_block *sb = inode->i_sb;
828 struct ufs_inode_info *ufsi = UFS_I(inode);
831 ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode);
832 ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink);
834 ufs_inode->ui_uid = cpu_to_fs32(sb, i_uid_read(inode));
835 ufs_inode->ui_gid = cpu_to_fs32(sb, i_gid_read(inode));
837 ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size);
838 ufs_inode->ui_atime = cpu_to_fs64(sb, inode->i_atime.tv_sec);
839 ufs_inode->ui_atimensec = cpu_to_fs32(sb, inode->i_atime.tv_nsec);
840 ufs_inode->ui_ctime = cpu_to_fs64(sb, inode->i_ctime.tv_sec);
841 ufs_inode->ui_ctimensec = cpu_to_fs32(sb, inode->i_ctime.tv_nsec);
842 ufs_inode->ui_mtime = cpu_to_fs64(sb, inode->i_mtime.tv_sec);
843 ufs_inode->ui_mtimensec = cpu_to_fs32(sb, inode->i_mtime.tv_nsec);
845 ufs_inode->ui_blocks = cpu_to_fs64(sb, inode->i_blocks);
846 ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags);
847 ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation);
849 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
850 /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */
851 ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.u2_i_data[0];
852 } else if (inode->i_blocks) {
853 memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.u2_i_data,
854 sizeof(ufs_inode->ui_u2.ui_addr));
856 memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink,
857 sizeof(ufs_inode->ui_u2.ui_symlink));
861 memset (ufs_inode, 0, sizeof(struct ufs2_inode));
865 static int ufs_update_inode(struct inode * inode, int do_sync)
867 struct super_block *sb = inode->i_sb;
868 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
869 struct buffer_head * bh;
871 UFSD("ENTER, ino %lu\n", inode->i_ino);
873 if (inode->i_ino < UFS_ROOTINO ||
874 inode->i_ino > (uspi->s_ncg * uspi->s_ipg)) {
875 ufs_warning (sb, "ufs_read_inode", "bad inode number (%lu)\n", inode->i_ino);
879 bh = sb_bread(sb, ufs_inotofsba(inode->i_ino));
881 ufs_warning (sb, "ufs_read_inode", "unable to read inode %lu\n", inode->i_ino);
884 if (uspi->fs_magic == UFS2_MAGIC) {
885 struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data;
887 ufs2_update_inode(inode,
888 ufs2_inode + ufs_inotofsbo(inode->i_ino));
890 struct ufs_inode *ufs_inode = (struct ufs_inode *) bh->b_data;
892 ufs1_update_inode(inode, ufs_inode + ufs_inotofsbo(inode->i_ino));
895 mark_buffer_dirty(bh);
897 sync_dirty_buffer(bh);
904 int ufs_write_inode(struct inode *inode, struct writeback_control *wbc)
906 return ufs_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL);
909 int ufs_sync_inode (struct inode *inode)
911 return ufs_update_inode (inode, 1);
914 void ufs_evict_inode(struct inode * inode)
918 if (!inode->i_nlink && !is_bad_inode(inode))
921 truncate_inode_pages_final(&inode->i_data);
925 ufs_truncate_blocks(inode);
928 invalidate_inode_buffers(inode);
932 ufs_free_inode(inode);
941 static inline void free_data(struct to_free *ctx, u64 from, unsigned count)
943 if (ctx->count && ctx->to != from) {
944 ufs_free_blocks(ctx->inode, ctx->to - ctx->count, ctx->count);
948 ctx->to = from + count;
951 #define DIRECT_BLOCK ((inode->i_size + uspi->s_bsize - 1) >> uspi->s_bshift)
952 #define DIRECT_FRAGMENT ((inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift)
954 static void ufs_trunc_direct(struct inode *inode)
956 struct ufs_inode_info *ufsi = UFS_I(inode);
957 struct super_block * sb;
958 struct ufs_sb_private_info * uspi;
960 u64 frag1, frag2, frag3, frag4, block1, block2;
961 struct to_free ctx = {.inode = inode};
964 UFSD("ENTER: ino %lu\n", inode->i_ino);
967 uspi = UFS_SB(sb)->s_uspi;
969 frag1 = DIRECT_FRAGMENT;
970 frag4 = min_t(u64, UFS_NDIR_FRAGMENT, ufsi->i_lastfrag);
971 frag2 = ((frag1 & uspi->s_fpbmask) ? ((frag1 | uspi->s_fpbmask) + 1) : frag1);
972 frag3 = frag4 & ~uspi->s_fpbmask;
977 } else if (frag2 < frag3) {
978 block1 = ufs_fragstoblks (frag2);
979 block2 = ufs_fragstoblks (frag3);
982 UFSD("ino %lu, frag1 %llu, frag2 %llu, block1 %llu, block2 %llu,"
983 " frag3 %llu, frag4 %llu\n", inode->i_ino,
984 (unsigned long long)frag1, (unsigned long long)frag2,
985 (unsigned long long)block1, (unsigned long long)block2,
986 (unsigned long long)frag3, (unsigned long long)frag4);
992 * Free first free fragments
994 p = ufs_get_direct_data_ptr(uspi, ufsi, ufs_fragstoblks(frag1));
995 tmp = ufs_data_ptr_to_cpu(sb, p);
997 ufs_panic (sb, "ufs_trunc_direct", "internal error");
999 frag1 = ufs_fragnum (frag1);
1001 ufs_free_fragments(inode, tmp + frag1, frag2);
1007 for (i = block1 ; i < block2; i++) {
1008 p = ufs_get_direct_data_ptr(uspi, ufsi, i);
1009 tmp = ufs_data_ptr_to_cpu(sb, p);
1012 write_seqlock(&ufsi->meta_lock);
1013 ufs_data_ptr_clear(uspi, p);
1014 write_sequnlock(&ufsi->meta_lock);
1016 free_data(&ctx, tmp, uspi->s_fpb);
1019 free_data(&ctx, 0, 0);
1025 * Free last free fragments
1027 p = ufs_get_direct_data_ptr(uspi, ufsi, ufs_fragstoblks(frag3));
1028 tmp = ufs_data_ptr_to_cpu(sb, p);
1030 ufs_panic(sb, "ufs_truncate_direct", "internal error");
1031 frag4 = ufs_fragnum (frag4);
1032 write_seqlock(&ufsi->meta_lock);
1033 ufs_data_ptr_clear(uspi, p);
1034 write_sequnlock(&ufsi->meta_lock);
1036 ufs_free_fragments (inode, tmp, frag4);
1039 UFSD("EXIT: ino %lu\n", inode->i_ino);
1042 static void free_full_branch(struct inode *inode, u64 ind_block, int depth)
1044 struct super_block *sb = inode->i_sb;
1045 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
1046 struct ufs_buffer_head *ubh = ubh_bread(sb, ind_block, uspi->s_bsize);
1053 for (i = 0; i < uspi->s_apb; i++) {
1054 void *p = ubh_get_data_ptr(uspi, ubh, i);
1055 u64 block = ufs_data_ptr_to_cpu(sb, p);
1057 free_full_branch(inode, block, depth);
1060 struct to_free ctx = {.inode = inode};
1062 for (i = 0; i < uspi->s_apb; i++) {
1063 void *p = ubh_get_data_ptr(uspi, ubh, i);
1064 u64 block = ufs_data_ptr_to_cpu(sb, p);
1066 free_data(&ctx, block, uspi->s_fpb);
1068 free_data(&ctx, 0, 0);
1072 ufs_free_blocks(inode, ind_block, uspi->s_fpb);
1075 static void free_branch_tail(struct inode *inode, unsigned from, struct ufs_buffer_head *ubh, int depth)
1077 struct super_block *sb = inode->i_sb;
1078 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
1082 for (i = from; i < uspi->s_apb ; i++) {
1083 void *p = ubh_get_data_ptr(uspi, ubh, i);
1084 u64 block = ufs_data_ptr_to_cpu(sb, p);
1086 write_seqlock(&UFS_I(inode)->meta_lock);
1087 ufs_data_ptr_clear(uspi, p);
1088 write_sequnlock(&UFS_I(inode)->meta_lock);
1089 ubh_mark_buffer_dirty(ubh);
1090 free_full_branch(inode, block, depth);
1094 struct to_free ctx = {.inode = inode};
1096 for (i = from; i < uspi->s_apb; i++) {
1097 void *p = ubh_get_data_ptr(uspi, ubh, i);
1098 u64 block = ufs_data_ptr_to_cpu(sb, p);
1100 write_seqlock(&UFS_I(inode)->meta_lock);
1101 ufs_data_ptr_clear(uspi, p);
1102 write_sequnlock(&UFS_I(inode)->meta_lock);
1103 ubh_mark_buffer_dirty(ubh);
1104 free_data(&ctx, block, uspi->s_fpb);
1107 free_data(&ctx, 0, 0);
1109 if (IS_SYNC(inode) && ubh_buffer_dirty(ubh))
1110 ubh_sync_block(ubh);
1114 static int ufs_alloc_lastblock(struct inode *inode, loff_t size)
1117 struct super_block *sb = inode->i_sb;
1118 struct address_space *mapping = inode->i_mapping;
1119 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
1122 struct page *lastpage;
1123 struct buffer_head *bh;
1126 lastfrag = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
1133 lastpage = ufs_get_locked_page(mapping, lastfrag >>
1134 (PAGE_CACHE_SHIFT - inode->i_blkbits));
1135 if (IS_ERR(lastpage)) {
1140 end = lastfrag & ((1 << (PAGE_CACHE_SHIFT - inode->i_blkbits)) - 1);
1141 bh = page_buffers(lastpage);
1142 for (i = 0; i < end; ++i)
1143 bh = bh->b_this_page;
1146 err = ufs_getfrag_block(inode, lastfrag, bh, 1);
1151 if (buffer_new(bh)) {
1152 clear_buffer_new(bh);
1153 unmap_underlying_metadata(bh->b_bdev,
1156 * we do not zeroize fragment, because of
1157 * if it maped to hole, it already contains zeroes
1159 set_buffer_uptodate(bh);
1160 mark_buffer_dirty(bh);
1161 set_page_dirty(lastpage);
1164 if (lastfrag >= UFS_IND_FRAGMENT) {
1165 end = uspi->s_fpb - ufs_fragnum(lastfrag) - 1;
1166 phys64 = bh->b_blocknr + 1;
1167 for (i = 0; i < end; ++i) {
1168 bh = sb_getblk(sb, i + phys64);
1170 memset(bh->b_data, 0, sb->s_blocksize);
1171 set_buffer_uptodate(bh);
1172 mark_buffer_dirty(bh);
1174 sync_dirty_buffer(bh);
1179 ufs_put_locked_page(lastpage);
1184 static void __ufs_truncate_blocks(struct inode *inode)
1186 struct ufs_inode_info *ufsi = UFS_I(inode);
1187 struct super_block *sb = inode->i_sb;
1188 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
1189 unsigned offsets[4];
1190 int depth = ufs_block_to_path(inode, DIRECT_BLOCK, offsets);
1193 struct ufs_buffer_head *ubh[3];
1200 /* find the last non-zero in offsets[] */
1201 for (depth2 = depth - 1; depth2; depth2--)
1202 if (offsets[depth2])
1205 mutex_lock(&ufsi->truncate_mutex);
1207 ufs_trunc_direct(inode);
1208 offsets[0] = UFS_IND_BLOCK;
1210 /* get the blocks that should be partially emptied */
1211 p = ufs_get_direct_data_ptr(uspi, ufsi, offsets[0]);
1212 for (i = 0; i < depth2; i++) {
1213 offsets[i]++; /* next branch is fully freed */
1214 block = ufs_data_ptr_to_cpu(sb, p);
1217 ubh[i] = ubh_bread(sb, block, uspi->s_bsize);
1219 write_seqlock(&ufsi->meta_lock);
1220 ufs_data_ptr_clear(uspi, p);
1221 write_sequnlock(&ufsi->meta_lock);
1224 p = ubh_get_data_ptr(uspi, ubh[i], offsets[i + 1]);
1227 free_branch_tail(inode, offsets[i + 1], ubh[i], depth - i - 1);
1229 for (i = offsets[0]; i <= UFS_TIND_BLOCK; i++) {
1230 p = ufs_get_direct_data_ptr(uspi, ufsi, i);
1231 block = ufs_data_ptr_to_cpu(sb, p);
1233 write_seqlock(&ufsi->meta_lock);
1234 ufs_data_ptr_clear(uspi, p);
1235 write_sequnlock(&ufsi->meta_lock);
1236 free_full_branch(inode, block, i - UFS_IND_BLOCK + 1);
1239 ufsi->i_lastfrag = DIRECT_FRAGMENT;
1240 mark_inode_dirty(inode);
1241 mutex_unlock(&ufsi->truncate_mutex);
1244 static int ufs_truncate(struct inode *inode, loff_t size)
1248 UFSD("ENTER: ino %lu, i_size: %llu, old_i_size: %llu\n",
1249 inode->i_ino, (unsigned long long)size,
1250 (unsigned long long)i_size_read(inode));
1252 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
1253 S_ISLNK(inode->i_mode)))
1255 if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
1258 err = ufs_alloc_lastblock(inode, size);
1263 block_truncate_page(inode->i_mapping, size, ufs_getfrag_block);
1265 truncate_setsize(inode, size);
1267 __ufs_truncate_blocks(inode);
1268 inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC;
1269 mark_inode_dirty(inode);
1271 UFSD("EXIT: err %d\n", err);
1275 void ufs_truncate_blocks(struct inode *inode)
1277 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
1278 S_ISLNK(inode->i_mode)))
1280 if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
1282 __ufs_truncate_blocks(inode);
1285 int ufs_setattr(struct dentry *dentry, struct iattr *attr)
1287 struct inode *inode = d_inode(dentry);
1288 unsigned int ia_valid = attr->ia_valid;
1291 error = inode_change_ok(inode, attr);
1295 if (ia_valid & ATTR_SIZE && attr->ia_size != inode->i_size) {
1296 error = ufs_truncate(inode, attr->ia_size);
1301 setattr_copy(inode, attr);
1302 mark_inode_dirty(inode);
1306 const struct inode_operations ufs_file_inode_operations = {
1307 .setattr = ufs_setattr,