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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * linux/fs/hfsplus/inode.c
4 *
5 * Copyright (C) 2001
6 * Brad Boyer (flar@allandria.com)
7 * (C) 2003 Ardis Technologies <roman@ardistech.com>
8 *
9 * Inode handling routines
10 */
11
12#include <linux/blkdev.h>
13#include <linux/mm.h>
14#include <linux/fs.h>
15#include <linux/pagemap.h>
16#include <linux/mpage.h>
17#include <linux/sched.h>
18#include <linux/cred.h>
19#include <linux/uio.h>
20#include <linux/fileattr.h>
21
22#include "hfsplus_fs.h"
23#include "hfsplus_raw.h"
24#include "xattr.h"
25
26static int hfsplus_read_folio(struct file *file, struct folio *folio)
27{
28 return block_read_full_folio(folio, hfsplus_get_block);
29}
30
31static int hfsplus_writepage(struct page *page, struct writeback_control *wbc)
32{
33 return block_write_full_page(page, hfsplus_get_block, wbc);
34}
35
36static void hfsplus_write_failed(struct address_space *mapping, loff_t to)
37{
38 struct inode *inode = mapping->host;
39
40 if (to > inode->i_size) {
41 truncate_pagecache(inode, inode->i_size);
42 hfsplus_file_truncate(inode);
43 }
44}
45
46int hfsplus_write_begin(struct file *file, struct address_space *mapping,
47 loff_t pos, unsigned len, struct page **pagep, void **fsdata)
48{
49 int ret;
50
51 *pagep = NULL;
52 ret = cont_write_begin(file, mapping, pos, len, pagep, fsdata,
53 hfsplus_get_block,
54 &HFSPLUS_I(mapping->host)->phys_size);
55 if (unlikely(ret))
56 hfsplus_write_failed(mapping, pos + len);
57
58 return ret;
59}
60
61static sector_t hfsplus_bmap(struct address_space *mapping, sector_t block)
62{
63 return generic_block_bmap(mapping, block, hfsplus_get_block);
64}
65
66static bool hfsplus_release_folio(struct folio *folio, gfp_t mask)
67{
68 struct inode *inode = folio->mapping->host;
69 struct super_block *sb = inode->i_sb;
70 struct hfs_btree *tree;
71 struct hfs_bnode *node;
72 u32 nidx;
73 int i;
74 bool res = true;
75
76 switch (inode->i_ino) {
77 case HFSPLUS_EXT_CNID:
78 tree = HFSPLUS_SB(sb)->ext_tree;
79 break;
80 case HFSPLUS_CAT_CNID:
81 tree = HFSPLUS_SB(sb)->cat_tree;
82 break;
83 case HFSPLUS_ATTR_CNID:
84 tree = HFSPLUS_SB(sb)->attr_tree;
85 break;
86 default:
87 BUG();
88 return false;
89 }
90 if (!tree)
91 return false;
92 if (tree->node_size >= PAGE_SIZE) {
93 nidx = folio->index >>
94 (tree->node_size_shift - PAGE_SHIFT);
95 spin_lock(&tree->hash_lock);
96 node = hfs_bnode_findhash(tree, nidx);
97 if (!node)
98 ;
99 else if (atomic_read(&node->refcnt))
100 res = false;
101 if (res && node) {
102 hfs_bnode_unhash(node);
103 hfs_bnode_free(node);
104 }
105 spin_unlock(&tree->hash_lock);
106 } else {
107 nidx = folio->index <<
108 (PAGE_SHIFT - tree->node_size_shift);
109 i = 1 << (PAGE_SHIFT - tree->node_size_shift);
110 spin_lock(&tree->hash_lock);
111 do {
112 node = hfs_bnode_findhash(tree, nidx++);
113 if (!node)
114 continue;
115 if (atomic_read(&node->refcnt)) {
116 res = false;
117 break;
118 }
119 hfs_bnode_unhash(node);
120 hfs_bnode_free(node);
121 } while (--i && nidx < tree->node_count);
122 spin_unlock(&tree->hash_lock);
123 }
124 return res ? try_to_free_buffers(folio) : false;
125}
126
127static ssize_t hfsplus_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
128{
129 struct file *file = iocb->ki_filp;
130 struct address_space *mapping = file->f_mapping;
131 struct inode *inode = mapping->host;
132 size_t count = iov_iter_count(iter);
133 ssize_t ret;
134
135 ret = blockdev_direct_IO(iocb, inode, iter, hfsplus_get_block);
136
137 /*
138 * In case of error extending write may have instantiated a few
139 * blocks outside i_size. Trim these off again.
140 */
141 if (unlikely(iov_iter_rw(iter) == WRITE && ret < 0)) {
142 loff_t isize = i_size_read(inode);
143 loff_t end = iocb->ki_pos + count;
144
145 if (end > isize)
146 hfsplus_write_failed(mapping, end);
147 }
148
149 return ret;
150}
151
152static int hfsplus_writepages(struct address_space *mapping,
153 struct writeback_control *wbc)
154{
155 return mpage_writepages(mapping, wbc, hfsplus_get_block);
156}
157
158const struct address_space_operations hfsplus_btree_aops = {
159 .dirty_folio = block_dirty_folio,
160 .invalidate_folio = block_invalidate_folio,
161 .read_folio = hfsplus_read_folio,
162 .writepage = hfsplus_writepage,
163 .write_begin = hfsplus_write_begin,
164 .write_end = generic_write_end,
165 .bmap = hfsplus_bmap,
166 .release_folio = hfsplus_release_folio,
167};
168
169const struct address_space_operations hfsplus_aops = {
170 .dirty_folio = block_dirty_folio,
171 .invalidate_folio = block_invalidate_folio,
172 .read_folio = hfsplus_read_folio,
173 .write_begin = hfsplus_write_begin,
174 .write_end = generic_write_end,
175 .bmap = hfsplus_bmap,
176 .direct_IO = hfsplus_direct_IO,
177 .writepages = hfsplus_writepages,
178 .migrate_folio = buffer_migrate_folio,
179};
180
181const struct dentry_operations hfsplus_dentry_operations = {
182 .d_hash = hfsplus_hash_dentry,
183 .d_compare = hfsplus_compare_dentry,
184};
185
186static void hfsplus_get_perms(struct inode *inode,
187 struct hfsplus_perm *perms, int dir)
188{
189 struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb);
190 u16 mode;
191
192 mode = be16_to_cpu(perms->mode);
193
194 i_uid_write(inode, be32_to_cpu(perms->owner));
195 if ((test_bit(HFSPLUS_SB_UID, &sbi->flags)) || (!i_uid_read(inode) && !mode))
196 inode->i_uid = sbi->uid;
197
198 i_gid_write(inode, be32_to_cpu(perms->group));
199 if ((test_bit(HFSPLUS_SB_GID, &sbi->flags)) || (!i_gid_read(inode) && !mode))
200 inode->i_gid = sbi->gid;
201
202 if (dir) {
203 mode = mode ? (mode & S_IALLUGO) : (S_IRWXUGO & ~(sbi->umask));
204 mode |= S_IFDIR;
205 } else if (!mode)
206 mode = S_IFREG | ((S_IRUGO|S_IWUGO) & ~(sbi->umask));
207 inode->i_mode = mode;
208
209 HFSPLUS_I(inode)->userflags = perms->userflags;
210 if (perms->rootflags & HFSPLUS_FLG_IMMUTABLE)
211 inode->i_flags |= S_IMMUTABLE;
212 else
213 inode->i_flags &= ~S_IMMUTABLE;
214 if (perms->rootflags & HFSPLUS_FLG_APPEND)
215 inode->i_flags |= S_APPEND;
216 else
217 inode->i_flags &= ~S_APPEND;
218}
219
220static int hfsplus_file_open(struct inode *inode, struct file *file)
221{
222 if (HFSPLUS_IS_RSRC(inode))
223 inode = HFSPLUS_I(inode)->rsrc_inode;
224 if (!(file->f_flags & O_LARGEFILE) && i_size_read(inode) > MAX_NON_LFS)
225 return -EOVERFLOW;
226 atomic_inc(&HFSPLUS_I(inode)->opencnt);
227 return 0;
228}
229
230static int hfsplus_file_release(struct inode *inode, struct file *file)
231{
232 struct super_block *sb = inode->i_sb;
233
234 if (HFSPLUS_IS_RSRC(inode))
235 inode = HFSPLUS_I(inode)->rsrc_inode;
236 if (atomic_dec_and_test(&HFSPLUS_I(inode)->opencnt)) {
237 inode_lock(inode);
238 hfsplus_file_truncate(inode);
239 if (inode->i_flags & S_DEAD) {
240 hfsplus_delete_cat(inode->i_ino,
241 HFSPLUS_SB(sb)->hidden_dir, NULL);
242 hfsplus_delete_inode(inode);
243 }
244 inode_unlock(inode);
245 }
246 return 0;
247}
248
249static int hfsplus_setattr(struct user_namespace *mnt_userns,
250 struct dentry *dentry, struct iattr *attr)
251{
252 struct inode *inode = d_inode(dentry);
253 int error;
254
255 error = setattr_prepare(&init_user_ns, dentry, attr);
256 if (error)
257 return error;
258
259 if ((attr->ia_valid & ATTR_SIZE) &&
260 attr->ia_size != i_size_read(inode)) {
261 inode_dio_wait(inode);
262 if (attr->ia_size > inode->i_size) {
263 error = generic_cont_expand_simple(inode,
264 attr->ia_size);
265 if (error)
266 return error;
267 }
268 truncate_setsize(inode, attr->ia_size);
269 hfsplus_file_truncate(inode);
270 inode->i_mtime = inode->i_ctime = current_time(inode);
271 }
272
273 setattr_copy(&init_user_ns, inode, attr);
274 mark_inode_dirty(inode);
275
276 return 0;
277}
278
279int hfsplus_getattr(struct user_namespace *mnt_userns, const struct path *path,
280 struct kstat *stat, u32 request_mask,
281 unsigned int query_flags)
282{
283 struct inode *inode = d_inode(path->dentry);
284 struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
285
286 if (request_mask & STATX_BTIME) {
287 stat->result_mask |= STATX_BTIME;
288 stat->btime = hfsp_mt2ut(hip->create_date);
289 }
290
291 if (inode->i_flags & S_APPEND)
292 stat->attributes |= STATX_ATTR_APPEND;
293 if (inode->i_flags & S_IMMUTABLE)
294 stat->attributes |= STATX_ATTR_IMMUTABLE;
295 if (hip->userflags & HFSPLUS_FLG_NODUMP)
296 stat->attributes |= STATX_ATTR_NODUMP;
297
298 stat->attributes_mask |= STATX_ATTR_APPEND | STATX_ATTR_IMMUTABLE |
299 STATX_ATTR_NODUMP;
300
301 generic_fillattr(&init_user_ns, inode, stat);
302 return 0;
303}
304
305int hfsplus_file_fsync(struct file *file, loff_t start, loff_t end,
306 int datasync)
307{
308 struct inode *inode = file->f_mapping->host;
309 struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
310 struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb);
311 int error = 0, error2;
312
313 error = file_write_and_wait_range(file, start, end);
314 if (error)
315 return error;
316 inode_lock(inode);
317
318 /*
319 * Sync inode metadata into the catalog and extent trees.
320 */
321 sync_inode_metadata(inode, 1);
322
323 /*
324 * And explicitly write out the btrees.
325 */
326 if (test_and_clear_bit(HFSPLUS_I_CAT_DIRTY, &hip->flags))
327 error = filemap_write_and_wait(sbi->cat_tree->inode->i_mapping);
328
329 if (test_and_clear_bit(HFSPLUS_I_EXT_DIRTY, &hip->flags)) {
330 error2 =
331 filemap_write_and_wait(sbi->ext_tree->inode->i_mapping);
332 if (!error)
333 error = error2;
334 }
335
336 if (test_and_clear_bit(HFSPLUS_I_ATTR_DIRTY, &hip->flags)) {
337 if (sbi->attr_tree) {
338 error2 =
339 filemap_write_and_wait(
340 sbi->attr_tree->inode->i_mapping);
341 if (!error)
342 error = error2;
343 } else {
344 pr_err("sync non-existent attributes tree\n");
345 }
346 }
347
348 if (test_and_clear_bit(HFSPLUS_I_ALLOC_DIRTY, &hip->flags)) {
349 error2 = filemap_write_and_wait(sbi->alloc_file->i_mapping);
350 if (!error)
351 error = error2;
352 }
353
354 if (!test_bit(HFSPLUS_SB_NOBARRIER, &sbi->flags))
355 blkdev_issue_flush(inode->i_sb->s_bdev);
356
357 inode_unlock(inode);
358
359 return error;
360}
361
362static const struct inode_operations hfsplus_file_inode_operations = {
363 .setattr = hfsplus_setattr,
364 .getattr = hfsplus_getattr,
365 .listxattr = hfsplus_listxattr,
366 .fileattr_get = hfsplus_fileattr_get,
367 .fileattr_set = hfsplus_fileattr_set,
368};
369
370static const struct file_operations hfsplus_file_operations = {
371 .llseek = generic_file_llseek,
372 .read_iter = generic_file_read_iter,
373 .write_iter = generic_file_write_iter,
374 .mmap = generic_file_mmap,
375 .splice_read = generic_file_splice_read,
376 .fsync = hfsplus_file_fsync,
377 .open = hfsplus_file_open,
378 .release = hfsplus_file_release,
379 .unlocked_ioctl = hfsplus_ioctl,
380};
381
382struct inode *hfsplus_new_inode(struct super_block *sb, struct inode *dir,
383 umode_t mode)
384{
385 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
386 struct inode *inode = new_inode(sb);
387 struct hfsplus_inode_info *hip;
388
389 if (!inode)
390 return NULL;
391
392 inode->i_ino = sbi->next_cnid++;
393 inode_init_owner(&init_user_ns, inode, dir, mode);
394 set_nlink(inode, 1);
395 inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode);
396
397 hip = HFSPLUS_I(inode);
398 INIT_LIST_HEAD(&hip->open_dir_list);
399 spin_lock_init(&hip->open_dir_lock);
400 mutex_init(&hip->extents_lock);
401 atomic_set(&hip->opencnt, 0);
402 hip->extent_state = 0;
403 hip->flags = 0;
404 hip->userflags = 0;
405 hip->subfolders = 0;
406 memset(hip->first_extents, 0, sizeof(hfsplus_extent_rec));
407 memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec));
408 hip->alloc_blocks = 0;
409 hip->first_blocks = 0;
410 hip->cached_start = 0;
411 hip->cached_blocks = 0;
412 hip->phys_size = 0;
413 hip->fs_blocks = 0;
414 hip->rsrc_inode = NULL;
415 if (S_ISDIR(inode->i_mode)) {
416 inode->i_size = 2;
417 sbi->folder_count++;
418 inode->i_op = &hfsplus_dir_inode_operations;
419 inode->i_fop = &hfsplus_dir_operations;
420 } else if (S_ISREG(inode->i_mode)) {
421 sbi->file_count++;
422 inode->i_op = &hfsplus_file_inode_operations;
423 inode->i_fop = &hfsplus_file_operations;
424 inode->i_mapping->a_ops = &hfsplus_aops;
425 hip->clump_blocks = sbi->data_clump_blocks;
426 } else if (S_ISLNK(inode->i_mode)) {
427 sbi->file_count++;
428 inode->i_op = &page_symlink_inode_operations;
429 inode_nohighmem(inode);
430 inode->i_mapping->a_ops = &hfsplus_aops;
431 hip->clump_blocks = 1;
432 } else
433 sbi->file_count++;
434 insert_inode_hash(inode);
435 mark_inode_dirty(inode);
436 hfsplus_mark_mdb_dirty(sb);
437
438 return inode;
439}
440
441void hfsplus_delete_inode(struct inode *inode)
442{
443 struct super_block *sb = inode->i_sb;
444
445 if (S_ISDIR(inode->i_mode)) {
446 HFSPLUS_SB(sb)->folder_count--;
447 hfsplus_mark_mdb_dirty(sb);
448 return;
449 }
450 HFSPLUS_SB(sb)->file_count--;
451 if (S_ISREG(inode->i_mode)) {
452 if (!inode->i_nlink) {
453 inode->i_size = 0;
454 hfsplus_file_truncate(inode);
455 }
456 } else if (S_ISLNK(inode->i_mode)) {
457 inode->i_size = 0;
458 hfsplus_file_truncate(inode);
459 }
460 hfsplus_mark_mdb_dirty(sb);
461}
462
463void hfsplus_inode_read_fork(struct inode *inode, struct hfsplus_fork_raw *fork)
464{
465 struct super_block *sb = inode->i_sb;
466 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
467 struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
468 u32 count;
469 int i;
470
471 memcpy(&hip->first_extents, &fork->extents, sizeof(hfsplus_extent_rec));
472 for (count = 0, i = 0; i < 8; i++)
473 count += be32_to_cpu(fork->extents[i].block_count);
474 hip->first_blocks = count;
475 memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec));
476 hip->cached_start = 0;
477 hip->cached_blocks = 0;
478
479 hip->alloc_blocks = be32_to_cpu(fork->total_blocks);
480 hip->phys_size = inode->i_size = be64_to_cpu(fork->total_size);
481 hip->fs_blocks =
482 (inode->i_size + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
483 inode_set_bytes(inode, hip->fs_blocks << sb->s_blocksize_bits);
484 hip->clump_blocks =
485 be32_to_cpu(fork->clump_size) >> sbi->alloc_blksz_shift;
486 if (!hip->clump_blocks) {
487 hip->clump_blocks = HFSPLUS_IS_RSRC(inode) ?
488 sbi->rsrc_clump_blocks :
489 sbi->data_clump_blocks;
490 }
491}
492
493void hfsplus_inode_write_fork(struct inode *inode,
494 struct hfsplus_fork_raw *fork)
495{
496 memcpy(&fork->extents, &HFSPLUS_I(inode)->first_extents,
497 sizeof(hfsplus_extent_rec));
498 fork->total_size = cpu_to_be64(inode->i_size);
499 fork->total_blocks = cpu_to_be32(HFSPLUS_I(inode)->alloc_blocks);
500}
501
502int hfsplus_cat_read_inode(struct inode *inode, struct hfs_find_data *fd)
503{
504 hfsplus_cat_entry entry;
505 int res = 0;
506 u16 type;
507
508 type = hfs_bnode_read_u16(fd->bnode, fd->entryoffset);
509
510 HFSPLUS_I(inode)->linkid = 0;
511 if (type == HFSPLUS_FOLDER) {
512 struct hfsplus_cat_folder *folder = &entry.folder;
513
514 WARN_ON(fd->entrylength < sizeof(struct hfsplus_cat_folder));
515 hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
516 sizeof(struct hfsplus_cat_folder));
517 hfsplus_get_perms(inode, &folder->permissions, 1);
518 set_nlink(inode, 1);
519 inode->i_size = 2 + be32_to_cpu(folder->valence);
520 inode->i_atime = hfsp_mt2ut(folder->access_date);
521 inode->i_mtime = hfsp_mt2ut(folder->content_mod_date);
522 inode->i_ctime = hfsp_mt2ut(folder->attribute_mod_date);
523 HFSPLUS_I(inode)->create_date = folder->create_date;
524 HFSPLUS_I(inode)->fs_blocks = 0;
525 if (folder->flags & cpu_to_be16(HFSPLUS_HAS_FOLDER_COUNT)) {
526 HFSPLUS_I(inode)->subfolders =
527 be32_to_cpu(folder->subfolders);
528 }
529 inode->i_op = &hfsplus_dir_inode_operations;
530 inode->i_fop = &hfsplus_dir_operations;
531 } else if (type == HFSPLUS_FILE) {
532 struct hfsplus_cat_file *file = &entry.file;
533
534 WARN_ON(fd->entrylength < sizeof(struct hfsplus_cat_file));
535 hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
536 sizeof(struct hfsplus_cat_file));
537
538 hfsplus_inode_read_fork(inode, HFSPLUS_IS_RSRC(inode) ?
539 &file->rsrc_fork : &file->data_fork);
540 hfsplus_get_perms(inode, &file->permissions, 0);
541 set_nlink(inode, 1);
542 if (S_ISREG(inode->i_mode)) {
543 if (file->permissions.dev)
544 set_nlink(inode,
545 be32_to_cpu(file->permissions.dev));
546 inode->i_op = &hfsplus_file_inode_operations;
547 inode->i_fop = &hfsplus_file_operations;
548 inode->i_mapping->a_ops = &hfsplus_aops;
549 } else if (S_ISLNK(inode->i_mode)) {
550 inode->i_op = &page_symlink_inode_operations;
551 inode_nohighmem(inode);
552 inode->i_mapping->a_ops = &hfsplus_aops;
553 } else {
554 init_special_inode(inode, inode->i_mode,
555 be32_to_cpu(file->permissions.dev));
556 }
557 inode->i_atime = hfsp_mt2ut(file->access_date);
558 inode->i_mtime = hfsp_mt2ut(file->content_mod_date);
559 inode->i_ctime = hfsp_mt2ut(file->attribute_mod_date);
560 HFSPLUS_I(inode)->create_date = file->create_date;
561 } else {
562 pr_err("bad catalog entry used to create inode\n");
563 res = -EIO;
564 }
565 return res;
566}
567
568int hfsplus_cat_write_inode(struct inode *inode)
569{
570 struct inode *main_inode = inode;
571 struct hfs_find_data fd;
572 hfsplus_cat_entry entry;
573
574 if (HFSPLUS_IS_RSRC(inode))
575 main_inode = HFSPLUS_I(inode)->rsrc_inode;
576
577 if (!main_inode->i_nlink)
578 return 0;
579
580 if (hfs_find_init(HFSPLUS_SB(main_inode->i_sb)->cat_tree, &fd))
581 /* panic? */
582 return -EIO;
583
584 if (hfsplus_find_cat(main_inode->i_sb, main_inode->i_ino, &fd))
585 /* panic? */
586 goto out;
587
588 if (S_ISDIR(main_inode->i_mode)) {
589 struct hfsplus_cat_folder *folder = &entry.folder;
590
591 WARN_ON(fd.entrylength < sizeof(struct hfsplus_cat_folder));
592 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
593 sizeof(struct hfsplus_cat_folder));
594 /* simple node checks? */
595 hfsplus_cat_set_perms(inode, &folder->permissions);
596 folder->access_date = hfsp_ut2mt(inode->i_atime);
597 folder->content_mod_date = hfsp_ut2mt(inode->i_mtime);
598 folder->attribute_mod_date = hfsp_ut2mt(inode->i_ctime);
599 folder->valence = cpu_to_be32(inode->i_size - 2);
600 if (folder->flags & cpu_to_be16(HFSPLUS_HAS_FOLDER_COUNT)) {
601 folder->subfolders =
602 cpu_to_be32(HFSPLUS_I(inode)->subfolders);
603 }
604 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
605 sizeof(struct hfsplus_cat_folder));
606 } else if (HFSPLUS_IS_RSRC(inode)) {
607 struct hfsplus_cat_file *file = &entry.file;
608 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
609 sizeof(struct hfsplus_cat_file));
610 hfsplus_inode_write_fork(inode, &file->rsrc_fork);
611 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
612 sizeof(struct hfsplus_cat_file));
613 } else {
614 struct hfsplus_cat_file *file = &entry.file;
615
616 WARN_ON(fd.entrylength < sizeof(struct hfsplus_cat_file));
617 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
618 sizeof(struct hfsplus_cat_file));
619 hfsplus_inode_write_fork(inode, &file->data_fork);
620 hfsplus_cat_set_perms(inode, &file->permissions);
621 if (HFSPLUS_FLG_IMMUTABLE &
622 (file->permissions.rootflags |
623 file->permissions.userflags))
624 file->flags |= cpu_to_be16(HFSPLUS_FILE_LOCKED);
625 else
626 file->flags &= cpu_to_be16(~HFSPLUS_FILE_LOCKED);
627 file->access_date = hfsp_ut2mt(inode->i_atime);
628 file->content_mod_date = hfsp_ut2mt(inode->i_mtime);
629 file->attribute_mod_date = hfsp_ut2mt(inode->i_ctime);
630 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
631 sizeof(struct hfsplus_cat_file));
632 }
633
634 set_bit(HFSPLUS_I_CAT_DIRTY, &HFSPLUS_I(inode)->flags);
635out:
636 hfs_find_exit(&fd);
637 return 0;
638}
639
640int hfsplus_fileattr_get(struct dentry *dentry, struct fileattr *fa)
641{
642 struct inode *inode = d_inode(dentry);
643 struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
644 unsigned int flags = 0;
645
646 if (inode->i_flags & S_IMMUTABLE)
647 flags |= FS_IMMUTABLE_FL;
648 if (inode->i_flags & S_APPEND)
649 flags |= FS_APPEND_FL;
650 if (hip->userflags & HFSPLUS_FLG_NODUMP)
651 flags |= FS_NODUMP_FL;
652
653 fileattr_fill_flags(fa, flags);
654
655 return 0;
656}
657
658int hfsplus_fileattr_set(struct user_namespace *mnt_userns,
659 struct dentry *dentry, struct fileattr *fa)
660{
661 struct inode *inode = d_inode(dentry);
662 struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
663 unsigned int new_fl = 0;
664
665 if (fileattr_has_fsx(fa))
666 return -EOPNOTSUPP;
667
668 /* don't silently ignore unsupported ext2 flags */
669 if (fa->flags & ~(FS_IMMUTABLE_FL|FS_APPEND_FL|FS_NODUMP_FL))
670 return -EOPNOTSUPP;
671
672 if (fa->flags & FS_IMMUTABLE_FL)
673 new_fl |= S_IMMUTABLE;
674
675 if (fa->flags & FS_APPEND_FL)
676 new_fl |= S_APPEND;
677
678 inode_set_flags(inode, new_fl, S_IMMUTABLE | S_APPEND);
679
680 if (fa->flags & FS_NODUMP_FL)
681 hip->userflags |= HFSPLUS_FLG_NODUMP;
682 else
683 hip->userflags &= ~HFSPLUS_FLG_NODUMP;
684
685 inode->i_ctime = current_time(inode);
686 mark_inode_dirty(inode);
687
688 return 0;
689}
1/*
2 * linux/fs/hfsplus/inode.c
3 *
4 * Copyright (C) 2001
5 * Brad Boyer (flar@allandria.com)
6 * (C) 2003 Ardis Technologies <roman@ardistech.com>
7 *
8 * Inode handling routines
9 */
10
11#include <linux/blkdev.h>
12#include <linux/mm.h>
13#include <linux/fs.h>
14#include <linux/pagemap.h>
15#include <linux/mpage.h>
16#include <linux/sched.h>
17
18#include "hfsplus_fs.h"
19#include "hfsplus_raw.h"
20
21static int hfsplus_readpage(struct file *file, struct page *page)
22{
23 return block_read_full_page(page, hfsplus_get_block);
24}
25
26static int hfsplus_writepage(struct page *page, struct writeback_control *wbc)
27{
28 return block_write_full_page(page, hfsplus_get_block, wbc);
29}
30
31static int hfsplus_write_begin(struct file *file, struct address_space *mapping,
32 loff_t pos, unsigned len, unsigned flags,
33 struct page **pagep, void **fsdata)
34{
35 int ret;
36
37 *pagep = NULL;
38 ret = cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
39 hfsplus_get_block,
40 &HFSPLUS_I(mapping->host)->phys_size);
41 if (unlikely(ret)) {
42 loff_t isize = mapping->host->i_size;
43 if (pos + len > isize)
44 vmtruncate(mapping->host, isize);
45 }
46
47 return ret;
48}
49
50static sector_t hfsplus_bmap(struct address_space *mapping, sector_t block)
51{
52 return generic_block_bmap(mapping, block, hfsplus_get_block);
53}
54
55static int hfsplus_releasepage(struct page *page, gfp_t mask)
56{
57 struct inode *inode = page->mapping->host;
58 struct super_block *sb = inode->i_sb;
59 struct hfs_btree *tree;
60 struct hfs_bnode *node;
61 u32 nidx;
62 int i, res = 1;
63
64 switch (inode->i_ino) {
65 case HFSPLUS_EXT_CNID:
66 tree = HFSPLUS_SB(sb)->ext_tree;
67 break;
68 case HFSPLUS_CAT_CNID:
69 tree = HFSPLUS_SB(sb)->cat_tree;
70 break;
71 case HFSPLUS_ATTR_CNID:
72 tree = HFSPLUS_SB(sb)->attr_tree;
73 break;
74 default:
75 BUG();
76 return 0;
77 }
78 if (!tree)
79 return 0;
80 if (tree->node_size >= PAGE_CACHE_SIZE) {
81 nidx = page->index >>
82 (tree->node_size_shift - PAGE_CACHE_SHIFT);
83 spin_lock(&tree->hash_lock);
84 node = hfs_bnode_findhash(tree, nidx);
85 if (!node)
86 ;
87 else if (atomic_read(&node->refcnt))
88 res = 0;
89 if (res && node) {
90 hfs_bnode_unhash(node);
91 hfs_bnode_free(node);
92 }
93 spin_unlock(&tree->hash_lock);
94 } else {
95 nidx = page->index <<
96 (PAGE_CACHE_SHIFT - tree->node_size_shift);
97 i = 1 << (PAGE_CACHE_SHIFT - tree->node_size_shift);
98 spin_lock(&tree->hash_lock);
99 do {
100 node = hfs_bnode_findhash(tree, nidx++);
101 if (!node)
102 continue;
103 if (atomic_read(&node->refcnt)) {
104 res = 0;
105 break;
106 }
107 hfs_bnode_unhash(node);
108 hfs_bnode_free(node);
109 } while (--i && nidx < tree->node_count);
110 spin_unlock(&tree->hash_lock);
111 }
112 return res ? try_to_free_buffers(page) : 0;
113}
114
115static ssize_t hfsplus_direct_IO(int rw, struct kiocb *iocb,
116 const struct iovec *iov, loff_t offset, unsigned long nr_segs)
117{
118 struct file *file = iocb->ki_filp;
119 struct inode *inode = file->f_path.dentry->d_inode->i_mapping->host;
120 ssize_t ret;
121
122 ret = blockdev_direct_IO(rw, iocb, inode, iov, offset, nr_segs,
123 hfsplus_get_block);
124
125 /*
126 * In case of error extending write may have instantiated a few
127 * blocks outside i_size. Trim these off again.
128 */
129 if (unlikely((rw & WRITE) && ret < 0)) {
130 loff_t isize = i_size_read(inode);
131 loff_t end = offset + iov_length(iov, nr_segs);
132
133 if (end > isize)
134 vmtruncate(inode, isize);
135 }
136
137 return ret;
138}
139
140static int hfsplus_writepages(struct address_space *mapping,
141 struct writeback_control *wbc)
142{
143 return mpage_writepages(mapping, wbc, hfsplus_get_block);
144}
145
146const struct address_space_operations hfsplus_btree_aops = {
147 .readpage = hfsplus_readpage,
148 .writepage = hfsplus_writepage,
149 .write_begin = hfsplus_write_begin,
150 .write_end = generic_write_end,
151 .bmap = hfsplus_bmap,
152 .releasepage = hfsplus_releasepage,
153};
154
155const struct address_space_operations hfsplus_aops = {
156 .readpage = hfsplus_readpage,
157 .writepage = hfsplus_writepage,
158 .write_begin = hfsplus_write_begin,
159 .write_end = generic_write_end,
160 .bmap = hfsplus_bmap,
161 .direct_IO = hfsplus_direct_IO,
162 .writepages = hfsplus_writepages,
163};
164
165const struct dentry_operations hfsplus_dentry_operations = {
166 .d_hash = hfsplus_hash_dentry,
167 .d_compare = hfsplus_compare_dentry,
168};
169
170static struct dentry *hfsplus_file_lookup(struct inode *dir,
171 struct dentry *dentry, struct nameidata *nd)
172{
173 struct hfs_find_data fd;
174 struct super_block *sb = dir->i_sb;
175 struct inode *inode = NULL;
176 struct hfsplus_inode_info *hip;
177 int err;
178
179 if (HFSPLUS_IS_RSRC(dir) || strcmp(dentry->d_name.name, "rsrc"))
180 goto out;
181
182 inode = HFSPLUS_I(dir)->rsrc_inode;
183 if (inode)
184 goto out;
185
186 inode = new_inode(sb);
187 if (!inode)
188 return ERR_PTR(-ENOMEM);
189
190 hip = HFSPLUS_I(inode);
191 inode->i_ino = dir->i_ino;
192 INIT_LIST_HEAD(&hip->open_dir_list);
193 mutex_init(&hip->extents_lock);
194 hip->extent_state = 0;
195 hip->flags = 0;
196 set_bit(HFSPLUS_I_RSRC, &hip->flags);
197
198 err = hfs_find_init(HFSPLUS_SB(sb)->cat_tree, &fd);
199 if (!err) {
200 err = hfsplus_find_cat(sb, dir->i_ino, &fd);
201 if (!err)
202 err = hfsplus_cat_read_inode(inode, &fd);
203 hfs_find_exit(&fd);
204 }
205 if (err) {
206 iput(inode);
207 return ERR_PTR(err);
208 }
209 hip->rsrc_inode = dir;
210 HFSPLUS_I(dir)->rsrc_inode = inode;
211 igrab(dir);
212
213 /*
214 * __mark_inode_dirty expects inodes to be hashed. Since we don't
215 * want resource fork inodes in the regular inode space, we make them
216 * appear hashed, but do not put on any lists. hlist_del()
217 * will work fine and require no locking.
218 */
219 hlist_add_fake(&inode->i_hash);
220
221 mark_inode_dirty(inode);
222out:
223 d_add(dentry, inode);
224 return NULL;
225}
226
227static void hfsplus_get_perms(struct inode *inode,
228 struct hfsplus_perm *perms, int dir)
229{
230 struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb);
231 u16 mode;
232
233 mode = be16_to_cpu(perms->mode);
234
235 inode->i_uid = be32_to_cpu(perms->owner);
236 if (!inode->i_uid && !mode)
237 inode->i_uid = sbi->uid;
238
239 inode->i_gid = be32_to_cpu(perms->group);
240 if (!inode->i_gid && !mode)
241 inode->i_gid = sbi->gid;
242
243 if (dir) {
244 mode = mode ? (mode & S_IALLUGO) : (S_IRWXUGO & ~(sbi->umask));
245 mode |= S_IFDIR;
246 } else if (!mode)
247 mode = S_IFREG | ((S_IRUGO|S_IWUGO) & ~(sbi->umask));
248 inode->i_mode = mode;
249
250 HFSPLUS_I(inode)->userflags = perms->userflags;
251 if (perms->rootflags & HFSPLUS_FLG_IMMUTABLE)
252 inode->i_flags |= S_IMMUTABLE;
253 else
254 inode->i_flags &= ~S_IMMUTABLE;
255 if (perms->rootflags & HFSPLUS_FLG_APPEND)
256 inode->i_flags |= S_APPEND;
257 else
258 inode->i_flags &= ~S_APPEND;
259}
260
261static int hfsplus_file_open(struct inode *inode, struct file *file)
262{
263 if (HFSPLUS_IS_RSRC(inode))
264 inode = HFSPLUS_I(inode)->rsrc_inode;
265 if (!(file->f_flags & O_LARGEFILE) && i_size_read(inode) > MAX_NON_LFS)
266 return -EOVERFLOW;
267 atomic_inc(&HFSPLUS_I(inode)->opencnt);
268 return 0;
269}
270
271static int hfsplus_file_release(struct inode *inode, struct file *file)
272{
273 struct super_block *sb = inode->i_sb;
274
275 if (HFSPLUS_IS_RSRC(inode))
276 inode = HFSPLUS_I(inode)->rsrc_inode;
277 if (atomic_dec_and_test(&HFSPLUS_I(inode)->opencnt)) {
278 mutex_lock(&inode->i_mutex);
279 hfsplus_file_truncate(inode);
280 if (inode->i_flags & S_DEAD) {
281 hfsplus_delete_cat(inode->i_ino,
282 HFSPLUS_SB(sb)->hidden_dir, NULL);
283 hfsplus_delete_inode(inode);
284 }
285 mutex_unlock(&inode->i_mutex);
286 }
287 return 0;
288}
289
290static int hfsplus_setattr(struct dentry *dentry, struct iattr *attr)
291{
292 struct inode *inode = dentry->d_inode;
293 int error;
294
295 error = inode_change_ok(inode, attr);
296 if (error)
297 return error;
298
299 if ((attr->ia_valid & ATTR_SIZE) &&
300 attr->ia_size != i_size_read(inode)) {
301 inode_dio_wait(inode);
302
303 error = vmtruncate(inode, attr->ia_size);
304 if (error)
305 return error;
306 }
307
308 setattr_copy(inode, attr);
309 mark_inode_dirty(inode);
310 return 0;
311}
312
313int hfsplus_file_fsync(struct file *file, loff_t start, loff_t end,
314 int datasync)
315{
316 struct inode *inode = file->f_mapping->host;
317 struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
318 struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb);
319 int error = 0, error2;
320
321 error = filemap_write_and_wait_range(inode->i_mapping, start, end);
322 if (error)
323 return error;
324 mutex_lock(&inode->i_mutex);
325
326 /*
327 * Sync inode metadata into the catalog and extent trees.
328 */
329 sync_inode_metadata(inode, 1);
330
331 /*
332 * And explicitly write out the btrees.
333 */
334 if (test_and_clear_bit(HFSPLUS_I_CAT_DIRTY, &hip->flags))
335 error = filemap_write_and_wait(sbi->cat_tree->inode->i_mapping);
336
337 if (test_and_clear_bit(HFSPLUS_I_EXT_DIRTY, &hip->flags)) {
338 error2 =
339 filemap_write_and_wait(sbi->ext_tree->inode->i_mapping);
340 if (!error)
341 error = error2;
342 }
343
344 if (test_and_clear_bit(HFSPLUS_I_ALLOC_DIRTY, &hip->flags)) {
345 error2 = filemap_write_and_wait(sbi->alloc_file->i_mapping);
346 if (!error)
347 error = error2;
348 }
349
350 if (!test_bit(HFSPLUS_SB_NOBARRIER, &sbi->flags))
351 blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL, NULL);
352
353 mutex_unlock(&inode->i_mutex);
354
355 return error;
356}
357
358static const struct inode_operations hfsplus_file_inode_operations = {
359 .lookup = hfsplus_file_lookup,
360 .truncate = hfsplus_file_truncate,
361 .setattr = hfsplus_setattr,
362 .setxattr = hfsplus_setxattr,
363 .getxattr = hfsplus_getxattr,
364 .listxattr = hfsplus_listxattr,
365};
366
367static const struct file_operations hfsplus_file_operations = {
368 .llseek = generic_file_llseek,
369 .read = do_sync_read,
370 .aio_read = generic_file_aio_read,
371 .write = do_sync_write,
372 .aio_write = generic_file_aio_write,
373 .mmap = generic_file_mmap,
374 .splice_read = generic_file_splice_read,
375 .fsync = hfsplus_file_fsync,
376 .open = hfsplus_file_open,
377 .release = hfsplus_file_release,
378 .unlocked_ioctl = hfsplus_ioctl,
379};
380
381struct inode *hfsplus_new_inode(struct super_block *sb, int mode)
382{
383 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
384 struct inode *inode = new_inode(sb);
385 struct hfsplus_inode_info *hip;
386
387 if (!inode)
388 return NULL;
389
390 inode->i_ino = sbi->next_cnid++;
391 inode->i_mode = mode;
392 inode->i_uid = current_fsuid();
393 inode->i_gid = current_fsgid();
394 inode->i_nlink = 1;
395 inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME_SEC;
396
397 hip = HFSPLUS_I(inode);
398 INIT_LIST_HEAD(&hip->open_dir_list);
399 mutex_init(&hip->extents_lock);
400 atomic_set(&hip->opencnt, 0);
401 hip->extent_state = 0;
402 hip->flags = 0;
403 memset(hip->first_extents, 0, sizeof(hfsplus_extent_rec));
404 memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec));
405 hip->alloc_blocks = 0;
406 hip->first_blocks = 0;
407 hip->cached_start = 0;
408 hip->cached_blocks = 0;
409 hip->phys_size = 0;
410 hip->fs_blocks = 0;
411 hip->rsrc_inode = NULL;
412 if (S_ISDIR(inode->i_mode)) {
413 inode->i_size = 2;
414 sbi->folder_count++;
415 inode->i_op = &hfsplus_dir_inode_operations;
416 inode->i_fop = &hfsplus_dir_operations;
417 } else if (S_ISREG(inode->i_mode)) {
418 sbi->file_count++;
419 inode->i_op = &hfsplus_file_inode_operations;
420 inode->i_fop = &hfsplus_file_operations;
421 inode->i_mapping->a_ops = &hfsplus_aops;
422 hip->clump_blocks = sbi->data_clump_blocks;
423 } else if (S_ISLNK(inode->i_mode)) {
424 sbi->file_count++;
425 inode->i_op = &page_symlink_inode_operations;
426 inode->i_mapping->a_ops = &hfsplus_aops;
427 hip->clump_blocks = 1;
428 } else
429 sbi->file_count++;
430 insert_inode_hash(inode);
431 mark_inode_dirty(inode);
432 sb->s_dirt = 1;
433
434 return inode;
435}
436
437void hfsplus_delete_inode(struct inode *inode)
438{
439 struct super_block *sb = inode->i_sb;
440
441 if (S_ISDIR(inode->i_mode)) {
442 HFSPLUS_SB(sb)->folder_count--;
443 sb->s_dirt = 1;
444 return;
445 }
446 HFSPLUS_SB(sb)->file_count--;
447 if (S_ISREG(inode->i_mode)) {
448 if (!inode->i_nlink) {
449 inode->i_size = 0;
450 hfsplus_file_truncate(inode);
451 }
452 } else if (S_ISLNK(inode->i_mode)) {
453 inode->i_size = 0;
454 hfsplus_file_truncate(inode);
455 }
456 sb->s_dirt = 1;
457}
458
459void hfsplus_inode_read_fork(struct inode *inode, struct hfsplus_fork_raw *fork)
460{
461 struct super_block *sb = inode->i_sb;
462 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
463 struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
464 u32 count;
465 int i;
466
467 memcpy(&hip->first_extents, &fork->extents, sizeof(hfsplus_extent_rec));
468 for (count = 0, i = 0; i < 8; i++)
469 count += be32_to_cpu(fork->extents[i].block_count);
470 hip->first_blocks = count;
471 memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec));
472 hip->cached_start = 0;
473 hip->cached_blocks = 0;
474
475 hip->alloc_blocks = be32_to_cpu(fork->total_blocks);
476 hip->phys_size = inode->i_size = be64_to_cpu(fork->total_size);
477 hip->fs_blocks =
478 (inode->i_size + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
479 inode_set_bytes(inode, hip->fs_blocks << sb->s_blocksize_bits);
480 hip->clump_blocks =
481 be32_to_cpu(fork->clump_size) >> sbi->alloc_blksz_shift;
482 if (!hip->clump_blocks) {
483 hip->clump_blocks = HFSPLUS_IS_RSRC(inode) ?
484 sbi->rsrc_clump_blocks :
485 sbi->data_clump_blocks;
486 }
487}
488
489void hfsplus_inode_write_fork(struct inode *inode,
490 struct hfsplus_fork_raw *fork)
491{
492 memcpy(&fork->extents, &HFSPLUS_I(inode)->first_extents,
493 sizeof(hfsplus_extent_rec));
494 fork->total_size = cpu_to_be64(inode->i_size);
495 fork->total_blocks = cpu_to_be32(HFSPLUS_I(inode)->alloc_blocks);
496}
497
498int hfsplus_cat_read_inode(struct inode *inode, struct hfs_find_data *fd)
499{
500 hfsplus_cat_entry entry;
501 int res = 0;
502 u16 type;
503
504 type = hfs_bnode_read_u16(fd->bnode, fd->entryoffset);
505
506 HFSPLUS_I(inode)->linkid = 0;
507 if (type == HFSPLUS_FOLDER) {
508 struct hfsplus_cat_folder *folder = &entry.folder;
509
510 if (fd->entrylength < sizeof(struct hfsplus_cat_folder))
511 /* panic? */;
512 hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
513 sizeof(struct hfsplus_cat_folder));
514 hfsplus_get_perms(inode, &folder->permissions, 1);
515 inode->i_nlink = 1;
516 inode->i_size = 2 + be32_to_cpu(folder->valence);
517 inode->i_atime = hfsp_mt2ut(folder->access_date);
518 inode->i_mtime = hfsp_mt2ut(folder->content_mod_date);
519 inode->i_ctime = hfsp_mt2ut(folder->attribute_mod_date);
520 HFSPLUS_I(inode)->create_date = folder->create_date;
521 HFSPLUS_I(inode)->fs_blocks = 0;
522 inode->i_op = &hfsplus_dir_inode_operations;
523 inode->i_fop = &hfsplus_dir_operations;
524 } else if (type == HFSPLUS_FILE) {
525 struct hfsplus_cat_file *file = &entry.file;
526
527 if (fd->entrylength < sizeof(struct hfsplus_cat_file))
528 /* panic? */;
529 hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
530 sizeof(struct hfsplus_cat_file));
531
532 hfsplus_inode_read_fork(inode, HFSPLUS_IS_RSRC(inode) ?
533 &file->rsrc_fork : &file->data_fork);
534 hfsplus_get_perms(inode, &file->permissions, 0);
535 inode->i_nlink = 1;
536 if (S_ISREG(inode->i_mode)) {
537 if (file->permissions.dev)
538 inode->i_nlink =
539 be32_to_cpu(file->permissions.dev);
540 inode->i_op = &hfsplus_file_inode_operations;
541 inode->i_fop = &hfsplus_file_operations;
542 inode->i_mapping->a_ops = &hfsplus_aops;
543 } else if (S_ISLNK(inode->i_mode)) {
544 inode->i_op = &page_symlink_inode_operations;
545 inode->i_mapping->a_ops = &hfsplus_aops;
546 } else {
547 init_special_inode(inode, inode->i_mode,
548 be32_to_cpu(file->permissions.dev));
549 }
550 inode->i_atime = hfsp_mt2ut(file->access_date);
551 inode->i_mtime = hfsp_mt2ut(file->content_mod_date);
552 inode->i_ctime = hfsp_mt2ut(file->attribute_mod_date);
553 HFSPLUS_I(inode)->create_date = file->create_date;
554 } else {
555 printk(KERN_ERR "hfs: bad catalog entry used to create inode\n");
556 res = -EIO;
557 }
558 return res;
559}
560
561int hfsplus_cat_write_inode(struct inode *inode)
562{
563 struct inode *main_inode = inode;
564 struct hfs_find_data fd;
565 hfsplus_cat_entry entry;
566
567 if (HFSPLUS_IS_RSRC(inode))
568 main_inode = HFSPLUS_I(inode)->rsrc_inode;
569
570 if (!main_inode->i_nlink)
571 return 0;
572
573 if (hfs_find_init(HFSPLUS_SB(main_inode->i_sb)->cat_tree, &fd))
574 /* panic? */
575 return -EIO;
576
577 if (hfsplus_find_cat(main_inode->i_sb, main_inode->i_ino, &fd))
578 /* panic? */
579 goto out;
580
581 if (S_ISDIR(main_inode->i_mode)) {
582 struct hfsplus_cat_folder *folder = &entry.folder;
583
584 if (fd.entrylength < sizeof(struct hfsplus_cat_folder))
585 /* panic? */;
586 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
587 sizeof(struct hfsplus_cat_folder));
588 /* simple node checks? */
589 hfsplus_cat_set_perms(inode, &folder->permissions);
590 folder->access_date = hfsp_ut2mt(inode->i_atime);
591 folder->content_mod_date = hfsp_ut2mt(inode->i_mtime);
592 folder->attribute_mod_date = hfsp_ut2mt(inode->i_ctime);
593 folder->valence = cpu_to_be32(inode->i_size - 2);
594 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
595 sizeof(struct hfsplus_cat_folder));
596 } else if (HFSPLUS_IS_RSRC(inode)) {
597 struct hfsplus_cat_file *file = &entry.file;
598 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
599 sizeof(struct hfsplus_cat_file));
600 hfsplus_inode_write_fork(inode, &file->rsrc_fork);
601 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
602 sizeof(struct hfsplus_cat_file));
603 } else {
604 struct hfsplus_cat_file *file = &entry.file;
605
606 if (fd.entrylength < sizeof(struct hfsplus_cat_file))
607 /* panic? */;
608 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
609 sizeof(struct hfsplus_cat_file));
610 hfsplus_inode_write_fork(inode, &file->data_fork);
611 hfsplus_cat_set_perms(inode, &file->permissions);
612 if (HFSPLUS_FLG_IMMUTABLE &
613 (file->permissions.rootflags |
614 file->permissions.userflags))
615 file->flags |= cpu_to_be16(HFSPLUS_FILE_LOCKED);
616 else
617 file->flags &= cpu_to_be16(~HFSPLUS_FILE_LOCKED);
618 file->access_date = hfsp_ut2mt(inode->i_atime);
619 file->content_mod_date = hfsp_ut2mt(inode->i_mtime);
620 file->attribute_mod_date = hfsp_ut2mt(inode->i_ctime);
621 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
622 sizeof(struct hfsplus_cat_file));
623 }
624
625 set_bit(HFSPLUS_I_CAT_DIRTY, &HFSPLUS_I(inode)->flags);
626out:
627 hfs_find_exit(&fd);
628 return 0;
629}