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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
21#include "hfsplus_fs.h"
22#include "hfsplus_raw.h"
23#include "xattr.h"
24
25static int hfsplus_readpage(struct file *file, struct page *page)
26{
27 return block_read_full_page(page, hfsplus_get_block);
28}
29
30static int hfsplus_writepage(struct page *page, struct writeback_control *wbc)
31{
32 return block_write_full_page(page, hfsplus_get_block, wbc);
33}
34
35static void hfsplus_write_failed(struct address_space *mapping, loff_t to)
36{
37 struct inode *inode = mapping->host;
38
39 if (to > inode->i_size) {
40 truncate_pagecache(inode, inode->i_size);
41 hfsplus_file_truncate(inode);
42 }
43}
44
45static int hfsplus_write_begin(struct file *file, struct address_space *mapping,
46 loff_t pos, unsigned len, unsigned flags,
47 struct page **pagep, void **fsdata)
48{
49 int ret;
50
51 *pagep = NULL;
52 ret = cont_write_begin(file, mapping, pos, len, flags, 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 int hfsplus_releasepage(struct page *page, gfp_t mask)
67{
68 struct inode *inode = page->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, res = 1;
74
75 switch (inode->i_ino) {
76 case HFSPLUS_EXT_CNID:
77 tree = HFSPLUS_SB(sb)->ext_tree;
78 break;
79 case HFSPLUS_CAT_CNID:
80 tree = HFSPLUS_SB(sb)->cat_tree;
81 break;
82 case HFSPLUS_ATTR_CNID:
83 tree = HFSPLUS_SB(sb)->attr_tree;
84 break;
85 default:
86 BUG();
87 return 0;
88 }
89 if (!tree)
90 return 0;
91 if (tree->node_size >= PAGE_SIZE) {
92 nidx = page->index >>
93 (tree->node_size_shift - PAGE_SHIFT);
94 spin_lock(&tree->hash_lock);
95 node = hfs_bnode_findhash(tree, nidx);
96 if (!node)
97 ;
98 else if (atomic_read(&node->refcnt))
99 res = 0;
100 if (res && node) {
101 hfs_bnode_unhash(node);
102 hfs_bnode_free(node);
103 }
104 spin_unlock(&tree->hash_lock);
105 } else {
106 nidx = page->index <<
107 (PAGE_SHIFT - tree->node_size_shift);
108 i = 1 << (PAGE_SHIFT - tree->node_size_shift);
109 spin_lock(&tree->hash_lock);
110 do {
111 node = hfs_bnode_findhash(tree, nidx++);
112 if (!node)
113 continue;
114 if (atomic_read(&node->refcnt)) {
115 res = 0;
116 break;
117 }
118 hfs_bnode_unhash(node);
119 hfs_bnode_free(node);
120 } while (--i && nidx < tree->node_count);
121 spin_unlock(&tree->hash_lock);
122 }
123 return res ? try_to_free_buffers(page) : 0;
124}
125
126static ssize_t hfsplus_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
127{
128 struct file *file = iocb->ki_filp;
129 struct address_space *mapping = file->f_mapping;
130 struct inode *inode = mapping->host;
131 size_t count = iov_iter_count(iter);
132 ssize_t ret;
133
134 ret = blockdev_direct_IO(iocb, inode, iter, hfsplus_get_block);
135
136 /*
137 * In case of error extending write may have instantiated a few
138 * blocks outside i_size. Trim these off again.
139 */
140 if (unlikely(iov_iter_rw(iter) == WRITE && ret < 0)) {
141 loff_t isize = i_size_read(inode);
142 loff_t end = iocb->ki_pos + count;
143
144 if (end > isize)
145 hfsplus_write_failed(mapping, end);
146 }
147
148 return ret;
149}
150
151static int hfsplus_writepages(struct address_space *mapping,
152 struct writeback_control *wbc)
153{
154 return mpage_writepages(mapping, wbc, hfsplus_get_block);
155}
156
157const struct address_space_operations hfsplus_btree_aops = {
158 .readpage = hfsplus_readpage,
159 .writepage = hfsplus_writepage,
160 .write_begin = hfsplus_write_begin,
161 .write_end = generic_write_end,
162 .bmap = hfsplus_bmap,
163 .releasepage = hfsplus_releasepage,
164};
165
166const struct address_space_operations hfsplus_aops = {
167 .readpage = hfsplus_readpage,
168 .writepage = hfsplus_writepage,
169 .write_begin = hfsplus_write_begin,
170 .write_end = generic_write_end,
171 .bmap = hfsplus_bmap,
172 .direct_IO = hfsplus_direct_IO,
173 .writepages = hfsplus_writepages,
174};
175
176const struct dentry_operations hfsplus_dentry_operations = {
177 .d_hash = hfsplus_hash_dentry,
178 .d_compare = hfsplus_compare_dentry,
179};
180
181static void hfsplus_get_perms(struct inode *inode,
182 struct hfsplus_perm *perms, int dir)
183{
184 struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb);
185 u16 mode;
186
187 mode = be16_to_cpu(perms->mode);
188
189 i_uid_write(inode, be32_to_cpu(perms->owner));
190 if (!i_uid_read(inode) && !mode)
191 inode->i_uid = sbi->uid;
192
193 i_gid_write(inode, be32_to_cpu(perms->group));
194 if (!i_gid_read(inode) && !mode)
195 inode->i_gid = sbi->gid;
196
197 if (dir) {
198 mode = mode ? (mode & S_IALLUGO) : (S_IRWXUGO & ~(sbi->umask));
199 mode |= S_IFDIR;
200 } else if (!mode)
201 mode = S_IFREG | ((S_IRUGO|S_IWUGO) & ~(sbi->umask));
202 inode->i_mode = mode;
203
204 HFSPLUS_I(inode)->userflags = perms->userflags;
205 if (perms->rootflags & HFSPLUS_FLG_IMMUTABLE)
206 inode->i_flags |= S_IMMUTABLE;
207 else
208 inode->i_flags &= ~S_IMMUTABLE;
209 if (perms->rootflags & HFSPLUS_FLG_APPEND)
210 inode->i_flags |= S_APPEND;
211 else
212 inode->i_flags &= ~S_APPEND;
213}
214
215static int hfsplus_file_open(struct inode *inode, struct file *file)
216{
217 if (HFSPLUS_IS_RSRC(inode))
218 inode = HFSPLUS_I(inode)->rsrc_inode;
219 if (!(file->f_flags & O_LARGEFILE) && i_size_read(inode) > MAX_NON_LFS)
220 return -EOVERFLOW;
221 atomic_inc(&HFSPLUS_I(inode)->opencnt);
222 return 0;
223}
224
225static int hfsplus_file_release(struct inode *inode, struct file *file)
226{
227 struct super_block *sb = inode->i_sb;
228
229 if (HFSPLUS_IS_RSRC(inode))
230 inode = HFSPLUS_I(inode)->rsrc_inode;
231 if (atomic_dec_and_test(&HFSPLUS_I(inode)->opencnt)) {
232 inode_lock(inode);
233 hfsplus_file_truncate(inode);
234 if (inode->i_flags & S_DEAD) {
235 hfsplus_delete_cat(inode->i_ino,
236 HFSPLUS_SB(sb)->hidden_dir, NULL);
237 hfsplus_delete_inode(inode);
238 }
239 inode_unlock(inode);
240 }
241 return 0;
242}
243
244static int hfsplus_setattr(struct dentry *dentry, struct iattr *attr)
245{
246 struct inode *inode = d_inode(dentry);
247 int error;
248
249 error = setattr_prepare(dentry, attr);
250 if (error)
251 return error;
252
253 if ((attr->ia_valid & ATTR_SIZE) &&
254 attr->ia_size != i_size_read(inode)) {
255 inode_dio_wait(inode);
256 if (attr->ia_size > inode->i_size) {
257 error = generic_cont_expand_simple(inode,
258 attr->ia_size);
259 if (error)
260 return error;
261 }
262 truncate_setsize(inode, attr->ia_size);
263 hfsplus_file_truncate(inode);
264 inode->i_mtime = inode->i_ctime = current_time(inode);
265 }
266
267 setattr_copy(inode, attr);
268 mark_inode_dirty(inode);
269
270 return 0;
271}
272
273int hfsplus_getattr(const struct path *path, struct kstat *stat,
274 u32 request_mask, unsigned int query_flags)
275{
276 struct inode *inode = d_inode(path->dentry);
277 struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
278
279 if (inode->i_flags & S_APPEND)
280 stat->attributes |= STATX_ATTR_APPEND;
281 if (inode->i_flags & S_IMMUTABLE)
282 stat->attributes |= STATX_ATTR_IMMUTABLE;
283 if (hip->userflags & HFSPLUS_FLG_NODUMP)
284 stat->attributes |= STATX_ATTR_NODUMP;
285
286 stat->attributes_mask |= STATX_ATTR_APPEND | STATX_ATTR_IMMUTABLE |
287 STATX_ATTR_NODUMP;
288
289 generic_fillattr(inode, stat);
290 return 0;
291}
292
293int hfsplus_file_fsync(struct file *file, loff_t start, loff_t end,
294 int datasync)
295{
296 struct inode *inode = file->f_mapping->host;
297 struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
298 struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb);
299 int error = 0, error2;
300
301 error = file_write_and_wait_range(file, start, end);
302 if (error)
303 return error;
304 inode_lock(inode);
305
306 /*
307 * Sync inode metadata into the catalog and extent trees.
308 */
309 sync_inode_metadata(inode, 1);
310
311 /*
312 * And explicitly write out the btrees.
313 */
314 if (test_and_clear_bit(HFSPLUS_I_CAT_DIRTY, &hip->flags))
315 error = filemap_write_and_wait(sbi->cat_tree->inode->i_mapping);
316
317 if (test_and_clear_bit(HFSPLUS_I_EXT_DIRTY, &hip->flags)) {
318 error2 =
319 filemap_write_and_wait(sbi->ext_tree->inode->i_mapping);
320 if (!error)
321 error = error2;
322 }
323
324 if (test_and_clear_bit(HFSPLUS_I_ATTR_DIRTY, &hip->flags)) {
325 if (sbi->attr_tree) {
326 error2 =
327 filemap_write_and_wait(
328 sbi->attr_tree->inode->i_mapping);
329 if (!error)
330 error = error2;
331 } else {
332 pr_err("sync non-existent attributes tree\n");
333 }
334 }
335
336 if (test_and_clear_bit(HFSPLUS_I_ALLOC_DIRTY, &hip->flags)) {
337 error2 = filemap_write_and_wait(sbi->alloc_file->i_mapping);
338 if (!error)
339 error = error2;
340 }
341
342 if (!test_bit(HFSPLUS_SB_NOBARRIER, &sbi->flags))
343 blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL);
344
345 inode_unlock(inode);
346
347 return error;
348}
349
350static const struct inode_operations hfsplus_file_inode_operations = {
351 .setattr = hfsplus_setattr,
352 .getattr = hfsplus_getattr,
353 .listxattr = hfsplus_listxattr,
354};
355
356static const struct file_operations hfsplus_file_operations = {
357 .llseek = generic_file_llseek,
358 .read_iter = generic_file_read_iter,
359 .write_iter = generic_file_write_iter,
360 .mmap = generic_file_mmap,
361 .splice_read = generic_file_splice_read,
362 .fsync = hfsplus_file_fsync,
363 .open = hfsplus_file_open,
364 .release = hfsplus_file_release,
365 .unlocked_ioctl = hfsplus_ioctl,
366};
367
368struct inode *hfsplus_new_inode(struct super_block *sb, struct inode *dir,
369 umode_t mode)
370{
371 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
372 struct inode *inode = new_inode(sb);
373 struct hfsplus_inode_info *hip;
374
375 if (!inode)
376 return NULL;
377
378 inode->i_ino = sbi->next_cnid++;
379 inode_init_owner(inode, dir, mode);
380 set_nlink(inode, 1);
381 inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode);
382
383 hip = HFSPLUS_I(inode);
384 INIT_LIST_HEAD(&hip->open_dir_list);
385 spin_lock_init(&hip->open_dir_lock);
386 mutex_init(&hip->extents_lock);
387 atomic_set(&hip->opencnt, 0);
388 hip->extent_state = 0;
389 hip->flags = 0;
390 hip->userflags = 0;
391 hip->subfolders = 0;
392 memset(hip->first_extents, 0, sizeof(hfsplus_extent_rec));
393 memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec));
394 hip->alloc_blocks = 0;
395 hip->first_blocks = 0;
396 hip->cached_start = 0;
397 hip->cached_blocks = 0;
398 hip->phys_size = 0;
399 hip->fs_blocks = 0;
400 hip->rsrc_inode = NULL;
401 if (S_ISDIR(inode->i_mode)) {
402 inode->i_size = 2;
403 sbi->folder_count++;
404 inode->i_op = &hfsplus_dir_inode_operations;
405 inode->i_fop = &hfsplus_dir_operations;
406 } else if (S_ISREG(inode->i_mode)) {
407 sbi->file_count++;
408 inode->i_op = &hfsplus_file_inode_operations;
409 inode->i_fop = &hfsplus_file_operations;
410 inode->i_mapping->a_ops = &hfsplus_aops;
411 hip->clump_blocks = sbi->data_clump_blocks;
412 } else if (S_ISLNK(inode->i_mode)) {
413 sbi->file_count++;
414 inode->i_op = &page_symlink_inode_operations;
415 inode_nohighmem(inode);
416 inode->i_mapping->a_ops = &hfsplus_aops;
417 hip->clump_blocks = 1;
418 } else
419 sbi->file_count++;
420 insert_inode_hash(inode);
421 mark_inode_dirty(inode);
422 hfsplus_mark_mdb_dirty(sb);
423
424 return inode;
425}
426
427void hfsplus_delete_inode(struct inode *inode)
428{
429 struct super_block *sb = inode->i_sb;
430
431 if (S_ISDIR(inode->i_mode)) {
432 HFSPLUS_SB(sb)->folder_count--;
433 hfsplus_mark_mdb_dirty(sb);
434 return;
435 }
436 HFSPLUS_SB(sb)->file_count--;
437 if (S_ISREG(inode->i_mode)) {
438 if (!inode->i_nlink) {
439 inode->i_size = 0;
440 hfsplus_file_truncate(inode);
441 }
442 } else if (S_ISLNK(inode->i_mode)) {
443 inode->i_size = 0;
444 hfsplus_file_truncate(inode);
445 }
446 hfsplus_mark_mdb_dirty(sb);
447}
448
449void hfsplus_inode_read_fork(struct inode *inode, struct hfsplus_fork_raw *fork)
450{
451 struct super_block *sb = inode->i_sb;
452 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
453 struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
454 u32 count;
455 int i;
456
457 memcpy(&hip->first_extents, &fork->extents, sizeof(hfsplus_extent_rec));
458 for (count = 0, i = 0; i < 8; i++)
459 count += be32_to_cpu(fork->extents[i].block_count);
460 hip->first_blocks = count;
461 memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec));
462 hip->cached_start = 0;
463 hip->cached_blocks = 0;
464
465 hip->alloc_blocks = be32_to_cpu(fork->total_blocks);
466 hip->phys_size = inode->i_size = be64_to_cpu(fork->total_size);
467 hip->fs_blocks =
468 (inode->i_size + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
469 inode_set_bytes(inode, hip->fs_blocks << sb->s_blocksize_bits);
470 hip->clump_blocks =
471 be32_to_cpu(fork->clump_size) >> sbi->alloc_blksz_shift;
472 if (!hip->clump_blocks) {
473 hip->clump_blocks = HFSPLUS_IS_RSRC(inode) ?
474 sbi->rsrc_clump_blocks :
475 sbi->data_clump_blocks;
476 }
477}
478
479void hfsplus_inode_write_fork(struct inode *inode,
480 struct hfsplus_fork_raw *fork)
481{
482 memcpy(&fork->extents, &HFSPLUS_I(inode)->first_extents,
483 sizeof(hfsplus_extent_rec));
484 fork->total_size = cpu_to_be64(inode->i_size);
485 fork->total_blocks = cpu_to_be32(HFSPLUS_I(inode)->alloc_blocks);
486}
487
488int hfsplus_cat_read_inode(struct inode *inode, struct hfs_find_data *fd)
489{
490 hfsplus_cat_entry entry;
491 int res = 0;
492 u16 type;
493
494 type = hfs_bnode_read_u16(fd->bnode, fd->entryoffset);
495
496 HFSPLUS_I(inode)->linkid = 0;
497 if (type == HFSPLUS_FOLDER) {
498 struct hfsplus_cat_folder *folder = &entry.folder;
499
500 if (fd->entrylength < sizeof(struct hfsplus_cat_folder))
501 /* panic? */;
502 hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
503 sizeof(struct hfsplus_cat_folder));
504 hfsplus_get_perms(inode, &folder->permissions, 1);
505 set_nlink(inode, 1);
506 inode->i_size = 2 + be32_to_cpu(folder->valence);
507 inode->i_atime = hfsp_mt2ut(folder->access_date);
508 inode->i_mtime = hfsp_mt2ut(folder->content_mod_date);
509 inode->i_ctime = hfsp_mt2ut(folder->attribute_mod_date);
510 HFSPLUS_I(inode)->create_date = folder->create_date;
511 HFSPLUS_I(inode)->fs_blocks = 0;
512 if (folder->flags & cpu_to_be16(HFSPLUS_HAS_FOLDER_COUNT)) {
513 HFSPLUS_I(inode)->subfolders =
514 be32_to_cpu(folder->subfolders);
515 }
516 inode->i_op = &hfsplus_dir_inode_operations;
517 inode->i_fop = &hfsplus_dir_operations;
518 } else if (type == HFSPLUS_FILE) {
519 struct hfsplus_cat_file *file = &entry.file;
520
521 if (fd->entrylength < sizeof(struct hfsplus_cat_file))
522 /* panic? */;
523 hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
524 sizeof(struct hfsplus_cat_file));
525
526 hfsplus_inode_read_fork(inode, HFSPLUS_IS_RSRC(inode) ?
527 &file->rsrc_fork : &file->data_fork);
528 hfsplus_get_perms(inode, &file->permissions, 0);
529 set_nlink(inode, 1);
530 if (S_ISREG(inode->i_mode)) {
531 if (file->permissions.dev)
532 set_nlink(inode,
533 be32_to_cpu(file->permissions.dev));
534 inode->i_op = &hfsplus_file_inode_operations;
535 inode->i_fop = &hfsplus_file_operations;
536 inode->i_mapping->a_ops = &hfsplus_aops;
537 } else if (S_ISLNK(inode->i_mode)) {
538 inode->i_op = &page_symlink_inode_operations;
539 inode_nohighmem(inode);
540 inode->i_mapping->a_ops = &hfsplus_aops;
541 } else {
542 init_special_inode(inode, inode->i_mode,
543 be32_to_cpu(file->permissions.dev));
544 }
545 inode->i_atime = hfsp_mt2ut(file->access_date);
546 inode->i_mtime = hfsp_mt2ut(file->content_mod_date);
547 inode->i_ctime = hfsp_mt2ut(file->attribute_mod_date);
548 HFSPLUS_I(inode)->create_date = file->create_date;
549 } else {
550 pr_err("bad catalog entry used to create inode\n");
551 res = -EIO;
552 }
553 return res;
554}
555
556int hfsplus_cat_write_inode(struct inode *inode)
557{
558 struct inode *main_inode = inode;
559 struct hfs_find_data fd;
560 hfsplus_cat_entry entry;
561
562 if (HFSPLUS_IS_RSRC(inode))
563 main_inode = HFSPLUS_I(inode)->rsrc_inode;
564
565 if (!main_inode->i_nlink)
566 return 0;
567
568 if (hfs_find_init(HFSPLUS_SB(main_inode->i_sb)->cat_tree, &fd))
569 /* panic? */
570 return -EIO;
571
572 if (hfsplus_find_cat(main_inode->i_sb, main_inode->i_ino, &fd))
573 /* panic? */
574 goto out;
575
576 if (S_ISDIR(main_inode->i_mode)) {
577 struct hfsplus_cat_folder *folder = &entry.folder;
578
579 if (fd.entrylength < sizeof(struct hfsplus_cat_folder))
580 /* panic? */;
581 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
582 sizeof(struct hfsplus_cat_folder));
583 /* simple node checks? */
584 hfsplus_cat_set_perms(inode, &folder->permissions);
585 folder->access_date = hfsp_ut2mt(inode->i_atime);
586 folder->content_mod_date = hfsp_ut2mt(inode->i_mtime);
587 folder->attribute_mod_date = hfsp_ut2mt(inode->i_ctime);
588 folder->valence = cpu_to_be32(inode->i_size - 2);
589 if (folder->flags & cpu_to_be16(HFSPLUS_HAS_FOLDER_COUNT)) {
590 folder->subfolders =
591 cpu_to_be32(HFSPLUS_I(inode)->subfolders);
592 }
593 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
594 sizeof(struct hfsplus_cat_folder));
595 } else if (HFSPLUS_IS_RSRC(inode)) {
596 struct hfsplus_cat_file *file = &entry.file;
597 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
598 sizeof(struct hfsplus_cat_file));
599 hfsplus_inode_write_fork(inode, &file->rsrc_fork);
600 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
601 sizeof(struct hfsplus_cat_file));
602 } else {
603 struct hfsplus_cat_file *file = &entry.file;
604
605 if (fd.entrylength < sizeof(struct hfsplus_cat_file))
606 /* panic? */;
607 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
608 sizeof(struct hfsplus_cat_file));
609 hfsplus_inode_write_fork(inode, &file->data_fork);
610 hfsplus_cat_set_perms(inode, &file->permissions);
611 if (HFSPLUS_FLG_IMMUTABLE &
612 (file->permissions.rootflags |
613 file->permissions.userflags))
614 file->flags |= cpu_to_be16(HFSPLUS_FILE_LOCKED);
615 else
616 file->flags &= cpu_to_be16(~HFSPLUS_FILE_LOCKED);
617 file->access_date = hfsp_ut2mt(inode->i_atime);
618 file->content_mod_date = hfsp_ut2mt(inode->i_mtime);
619 file->attribute_mod_date = hfsp_ut2mt(inode->i_ctime);
620 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
621 sizeof(struct hfsplus_cat_file));
622 }
623
624 set_bit(HFSPLUS_I_CAT_DIRTY, &HFSPLUS_I(inode)->flags);
625out:
626 hfs_find_exit(&fd);
627 return 0;
628}
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 void hfsplus_write_failed(struct address_space *mapping, loff_t to)
32{
33 struct inode *inode = mapping->host;
34
35 if (to > inode->i_size) {
36 truncate_pagecache(inode, inode->i_size);
37 hfsplus_file_truncate(inode);
38 }
39}
40
41int hfsplus_write_begin(struct file *file, struct address_space *mapping,
42 loff_t pos, unsigned len, struct page **pagep, void **fsdata)
43{
44 int ret;
45
46 *pagep = NULL;
47 ret = cont_write_begin(file, mapping, pos, len, pagep, fsdata,
48 hfsplus_get_block,
49 &HFSPLUS_I(mapping->host)->phys_size);
50 if (unlikely(ret))
51 hfsplus_write_failed(mapping, pos + len);
52
53 return ret;
54}
55
56static sector_t hfsplus_bmap(struct address_space *mapping, sector_t block)
57{
58 return generic_block_bmap(mapping, block, hfsplus_get_block);
59}
60
61static bool hfsplus_release_folio(struct folio *folio, gfp_t mask)
62{
63 struct inode *inode = folio->mapping->host;
64 struct super_block *sb = inode->i_sb;
65 struct hfs_btree *tree;
66 struct hfs_bnode *node;
67 u32 nidx;
68 int i;
69 bool res = true;
70
71 switch (inode->i_ino) {
72 case HFSPLUS_EXT_CNID:
73 tree = HFSPLUS_SB(sb)->ext_tree;
74 break;
75 case HFSPLUS_CAT_CNID:
76 tree = HFSPLUS_SB(sb)->cat_tree;
77 break;
78 case HFSPLUS_ATTR_CNID:
79 tree = HFSPLUS_SB(sb)->attr_tree;
80 break;
81 default:
82 BUG();
83 return false;
84 }
85 if (!tree)
86 return false;
87 if (tree->node_size >= PAGE_SIZE) {
88 nidx = folio->index >>
89 (tree->node_size_shift - PAGE_SHIFT);
90 spin_lock(&tree->hash_lock);
91 node = hfs_bnode_findhash(tree, nidx);
92 if (!node)
93 ;
94 else if (atomic_read(&node->refcnt))
95 res = false;
96 if (res && node) {
97 hfs_bnode_unhash(node);
98 hfs_bnode_free(node);
99 }
100 spin_unlock(&tree->hash_lock);
101 } else {
102 nidx = folio->index <<
103 (PAGE_SHIFT - tree->node_size_shift);
104 i = 1 << (PAGE_SHIFT - tree->node_size_shift);
105 spin_lock(&tree->hash_lock);
106 do {
107 node = hfs_bnode_findhash(tree, nidx++);
108 if (!node)
109 continue;
110 if (atomic_read(&node->refcnt)) {
111 res = false;
112 break;
113 }
114 hfs_bnode_unhash(node);
115 hfs_bnode_free(node);
116 } while (--i && nidx < tree->node_count);
117 spin_unlock(&tree->hash_lock);
118 }
119 return res ? try_to_free_buffers(folio) : false;
120}
121
122static ssize_t hfsplus_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
123{
124 struct file *file = iocb->ki_filp;
125 struct address_space *mapping = file->f_mapping;
126 struct inode *inode = mapping->host;
127 size_t count = iov_iter_count(iter);
128 ssize_t ret;
129
130 ret = blockdev_direct_IO(iocb, inode, iter, hfsplus_get_block);
131
132 /*
133 * In case of error extending write may have instantiated a few
134 * blocks outside i_size. Trim these off again.
135 */
136 if (unlikely(iov_iter_rw(iter) == WRITE && ret < 0)) {
137 loff_t isize = i_size_read(inode);
138 loff_t end = iocb->ki_pos + count;
139
140 if (end > isize)
141 hfsplus_write_failed(mapping, end);
142 }
143
144 return ret;
145}
146
147static int hfsplus_writepages(struct address_space *mapping,
148 struct writeback_control *wbc)
149{
150 return mpage_writepages(mapping, wbc, hfsplus_get_block);
151}
152
153const struct address_space_operations hfsplus_btree_aops = {
154 .dirty_folio = block_dirty_folio,
155 .invalidate_folio = block_invalidate_folio,
156 .read_folio = hfsplus_read_folio,
157 .writepages = hfsplus_writepages,
158 .write_begin = hfsplus_write_begin,
159 .write_end = generic_write_end,
160 .migrate_folio = buffer_migrate_folio,
161 .bmap = hfsplus_bmap,
162 .release_folio = hfsplus_release_folio,
163};
164
165const struct address_space_operations hfsplus_aops = {
166 .dirty_folio = block_dirty_folio,
167 .invalidate_folio = block_invalidate_folio,
168 .read_folio = hfsplus_read_folio,
169 .write_begin = hfsplus_write_begin,
170 .write_end = generic_write_end,
171 .bmap = hfsplus_bmap,
172 .direct_IO = hfsplus_direct_IO,
173 .writepages = hfsplus_writepages,
174 .migrate_folio = buffer_migrate_folio,
175};
176
177const struct dentry_operations hfsplus_dentry_operations = {
178 .d_hash = hfsplus_hash_dentry,
179 .d_compare = hfsplus_compare_dentry,
180};
181
182static void hfsplus_get_perms(struct inode *inode,
183 struct hfsplus_perm *perms, int dir)
184{
185 struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb);
186 u16 mode;
187
188 mode = be16_to_cpu(perms->mode);
189
190 i_uid_write(inode, be32_to_cpu(perms->owner));
191 if ((test_bit(HFSPLUS_SB_UID, &sbi->flags)) || (!i_uid_read(inode) && !mode))
192 inode->i_uid = sbi->uid;
193
194 i_gid_write(inode, be32_to_cpu(perms->group));
195 if ((test_bit(HFSPLUS_SB_GID, &sbi->flags)) || (!i_gid_read(inode) && !mode))
196 inode->i_gid = sbi->gid;
197
198 if (dir) {
199 mode = mode ? (mode & S_IALLUGO) : (S_IRWXUGO & ~(sbi->umask));
200 mode |= S_IFDIR;
201 } else if (!mode)
202 mode = S_IFREG | ((S_IRUGO|S_IWUGO) & ~(sbi->umask));
203 inode->i_mode = mode;
204
205 HFSPLUS_I(inode)->userflags = perms->userflags;
206 if (perms->rootflags & HFSPLUS_FLG_IMMUTABLE)
207 inode->i_flags |= S_IMMUTABLE;
208 else
209 inode->i_flags &= ~S_IMMUTABLE;
210 if (perms->rootflags & HFSPLUS_FLG_APPEND)
211 inode->i_flags |= S_APPEND;
212 else
213 inode->i_flags &= ~S_APPEND;
214}
215
216static int hfsplus_file_open(struct inode *inode, struct file *file)
217{
218 if (HFSPLUS_IS_RSRC(inode))
219 inode = HFSPLUS_I(inode)->rsrc_inode;
220 if (!(file->f_flags & O_LARGEFILE) && i_size_read(inode) > MAX_NON_LFS)
221 return -EOVERFLOW;
222 atomic_inc(&HFSPLUS_I(inode)->opencnt);
223 return 0;
224}
225
226static int hfsplus_file_release(struct inode *inode, struct file *file)
227{
228 struct super_block *sb = inode->i_sb;
229
230 if (HFSPLUS_IS_RSRC(inode))
231 inode = HFSPLUS_I(inode)->rsrc_inode;
232 if (atomic_dec_and_test(&HFSPLUS_I(inode)->opencnt)) {
233 inode_lock(inode);
234 hfsplus_file_truncate(inode);
235 if (inode->i_flags & S_DEAD) {
236 hfsplus_delete_cat(inode->i_ino,
237 HFSPLUS_SB(sb)->hidden_dir, NULL);
238 hfsplus_delete_inode(inode);
239 }
240 inode_unlock(inode);
241 }
242 return 0;
243}
244
245static int hfsplus_setattr(struct mnt_idmap *idmap,
246 struct dentry *dentry, struct iattr *attr)
247{
248 struct inode *inode = d_inode(dentry);
249 int error;
250
251 error = setattr_prepare(&nop_mnt_idmap, dentry, attr);
252 if (error)
253 return error;
254
255 if ((attr->ia_valid & ATTR_SIZE) &&
256 attr->ia_size != i_size_read(inode)) {
257 inode_dio_wait(inode);
258 if (attr->ia_size > inode->i_size) {
259 error = generic_cont_expand_simple(inode,
260 attr->ia_size);
261 if (error)
262 return error;
263 }
264 truncate_setsize(inode, attr->ia_size);
265 hfsplus_file_truncate(inode);
266 inode_set_mtime_to_ts(inode, inode_set_ctime_current(inode));
267 }
268
269 setattr_copy(&nop_mnt_idmap, inode, attr);
270 mark_inode_dirty(inode);
271
272 return 0;
273}
274
275int hfsplus_getattr(struct mnt_idmap *idmap, const struct path *path,
276 struct kstat *stat, u32 request_mask,
277 unsigned int query_flags)
278{
279 struct inode *inode = d_inode(path->dentry);
280 struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
281
282 if (request_mask & STATX_BTIME) {
283 stat->result_mask |= STATX_BTIME;
284 stat->btime = hfsp_mt2ut(hip->create_date);
285 }
286
287 if (inode->i_flags & S_APPEND)
288 stat->attributes |= STATX_ATTR_APPEND;
289 if (inode->i_flags & S_IMMUTABLE)
290 stat->attributes |= STATX_ATTR_IMMUTABLE;
291 if (hip->userflags & HFSPLUS_FLG_NODUMP)
292 stat->attributes |= STATX_ATTR_NODUMP;
293
294 stat->attributes_mask |= STATX_ATTR_APPEND | STATX_ATTR_IMMUTABLE |
295 STATX_ATTR_NODUMP;
296
297 generic_fillattr(&nop_mnt_idmap, request_mask, inode, stat);
298 return 0;
299}
300
301int hfsplus_file_fsync(struct file *file, loff_t start, loff_t end,
302 int datasync)
303{
304 struct inode *inode = file->f_mapping->host;
305 struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
306 struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb);
307 int error = 0, error2;
308
309 error = file_write_and_wait_range(file, start, end);
310 if (error)
311 return error;
312 inode_lock(inode);
313
314 /*
315 * Sync inode metadata into the catalog and extent trees.
316 */
317 sync_inode_metadata(inode, 1);
318
319 /*
320 * And explicitly write out the btrees.
321 */
322 if (test_and_clear_bit(HFSPLUS_I_CAT_DIRTY, &hip->flags))
323 error = filemap_write_and_wait(sbi->cat_tree->inode->i_mapping);
324
325 if (test_and_clear_bit(HFSPLUS_I_EXT_DIRTY, &hip->flags)) {
326 error2 =
327 filemap_write_and_wait(sbi->ext_tree->inode->i_mapping);
328 if (!error)
329 error = error2;
330 }
331
332 if (test_and_clear_bit(HFSPLUS_I_ATTR_DIRTY, &hip->flags)) {
333 if (sbi->attr_tree) {
334 error2 =
335 filemap_write_and_wait(
336 sbi->attr_tree->inode->i_mapping);
337 if (!error)
338 error = error2;
339 } else {
340 pr_err("sync non-existent attributes tree\n");
341 }
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);
352
353 inode_unlock(inode);
354
355 return error;
356}
357
358static const struct inode_operations hfsplus_file_inode_operations = {
359 .setattr = hfsplus_setattr,
360 .getattr = hfsplus_getattr,
361 .listxattr = hfsplus_listxattr,
362 .fileattr_get = hfsplus_fileattr_get,
363 .fileattr_set = hfsplus_fileattr_set,
364};
365
366static const struct file_operations hfsplus_file_operations = {
367 .llseek = generic_file_llseek,
368 .read_iter = generic_file_read_iter,
369 .write_iter = generic_file_write_iter,
370 .mmap = generic_file_mmap,
371 .splice_read = filemap_splice_read,
372 .fsync = hfsplus_file_fsync,
373 .open = hfsplus_file_open,
374 .release = hfsplus_file_release,
375 .unlocked_ioctl = hfsplus_ioctl,
376};
377
378struct inode *hfsplus_new_inode(struct super_block *sb, struct inode *dir,
379 umode_t mode)
380{
381 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
382 struct inode *inode = new_inode(sb);
383 struct hfsplus_inode_info *hip;
384
385 if (!inode)
386 return NULL;
387
388 inode->i_ino = sbi->next_cnid++;
389 inode_init_owner(&nop_mnt_idmap, inode, dir, mode);
390 set_nlink(inode, 1);
391 simple_inode_init_ts(inode);
392
393 hip = HFSPLUS_I(inode);
394 INIT_LIST_HEAD(&hip->open_dir_list);
395 spin_lock_init(&hip->open_dir_lock);
396 mutex_init(&hip->extents_lock);
397 atomic_set(&hip->opencnt, 0);
398 hip->extent_state = 0;
399 hip->flags = 0;
400 hip->userflags = 0;
401 hip->subfolders = 0;
402 memset(hip->first_extents, 0, sizeof(hfsplus_extent_rec));
403 memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec));
404 hip->alloc_blocks = 0;
405 hip->first_blocks = 0;
406 hip->cached_start = 0;
407 hip->cached_blocks = 0;
408 hip->phys_size = 0;
409 hip->fs_blocks = 0;
410 hip->rsrc_inode = NULL;
411 if (S_ISDIR(inode->i_mode)) {
412 inode->i_size = 2;
413 sbi->folder_count++;
414 inode->i_op = &hfsplus_dir_inode_operations;
415 inode->i_fop = &hfsplus_dir_operations;
416 } else if (S_ISREG(inode->i_mode)) {
417 sbi->file_count++;
418 inode->i_op = &hfsplus_file_inode_operations;
419 inode->i_fop = &hfsplus_file_operations;
420 inode->i_mapping->a_ops = &hfsplus_aops;
421 hip->clump_blocks = sbi->data_clump_blocks;
422 } else if (S_ISLNK(inode->i_mode)) {
423 sbi->file_count++;
424 inode->i_op = &page_symlink_inode_operations;
425 inode_nohighmem(inode);
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 hfsplus_mark_mdb_dirty(sb);
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 hfsplus_mark_mdb_dirty(sb);
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 hfsplus_mark_mdb_dirty(sb);
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 pr_err("bad catalog folder entry\n");
512 res = -EIO;
513 goto out;
514 }
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_set_atime_to_ts(inode, hfsp_mt2ut(folder->access_date));
521 inode_set_mtime_to_ts(inode,
522 hfsp_mt2ut(folder->content_mod_date));
523 inode_set_ctime_to_ts(inode,
524 hfsp_mt2ut(folder->attribute_mod_date));
525 HFSPLUS_I(inode)->create_date = folder->create_date;
526 HFSPLUS_I(inode)->fs_blocks = 0;
527 if (folder->flags & cpu_to_be16(HFSPLUS_HAS_FOLDER_COUNT)) {
528 HFSPLUS_I(inode)->subfolders =
529 be32_to_cpu(folder->subfolders);
530 }
531 inode->i_op = &hfsplus_dir_inode_operations;
532 inode->i_fop = &hfsplus_dir_operations;
533 } else if (type == HFSPLUS_FILE) {
534 struct hfsplus_cat_file *file = &entry.file;
535
536 if (fd->entrylength < sizeof(struct hfsplus_cat_file)) {
537 pr_err("bad catalog file entry\n");
538 res = -EIO;
539 goto out;
540 }
541 hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
542 sizeof(struct hfsplus_cat_file));
543
544 hfsplus_inode_read_fork(inode, HFSPLUS_IS_RSRC(inode) ?
545 &file->rsrc_fork : &file->data_fork);
546 hfsplus_get_perms(inode, &file->permissions, 0);
547 set_nlink(inode, 1);
548 if (S_ISREG(inode->i_mode)) {
549 if (file->permissions.dev)
550 set_nlink(inode,
551 be32_to_cpu(file->permissions.dev));
552 inode->i_op = &hfsplus_file_inode_operations;
553 inode->i_fop = &hfsplus_file_operations;
554 inode->i_mapping->a_ops = &hfsplus_aops;
555 } else if (S_ISLNK(inode->i_mode)) {
556 inode->i_op = &page_symlink_inode_operations;
557 inode_nohighmem(inode);
558 inode->i_mapping->a_ops = &hfsplus_aops;
559 } else {
560 init_special_inode(inode, inode->i_mode,
561 be32_to_cpu(file->permissions.dev));
562 }
563 inode_set_atime_to_ts(inode, hfsp_mt2ut(file->access_date));
564 inode_set_mtime_to_ts(inode,
565 hfsp_mt2ut(file->content_mod_date));
566 inode_set_ctime_to_ts(inode,
567 hfsp_mt2ut(file->attribute_mod_date));
568 HFSPLUS_I(inode)->create_date = file->create_date;
569 } else {
570 pr_err("bad catalog entry used to create inode\n");
571 res = -EIO;
572 }
573out:
574 return res;
575}
576
577int hfsplus_cat_write_inode(struct inode *inode)
578{
579 struct inode *main_inode = inode;
580 struct hfs_find_data fd;
581 hfsplus_cat_entry entry;
582 int res = 0;
583
584 if (HFSPLUS_IS_RSRC(inode))
585 main_inode = HFSPLUS_I(inode)->rsrc_inode;
586
587 if (!main_inode->i_nlink)
588 return 0;
589
590 if (hfs_find_init(HFSPLUS_SB(main_inode->i_sb)->cat_tree, &fd))
591 /* panic? */
592 return -EIO;
593
594 if (hfsplus_find_cat(main_inode->i_sb, main_inode->i_ino, &fd))
595 /* panic? */
596 goto out;
597
598 if (S_ISDIR(main_inode->i_mode)) {
599 struct hfsplus_cat_folder *folder = &entry.folder;
600
601 if (fd.entrylength < sizeof(struct hfsplus_cat_folder)) {
602 pr_err("bad catalog folder entry\n");
603 res = -EIO;
604 goto out;
605 }
606 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
607 sizeof(struct hfsplus_cat_folder));
608 /* simple node checks? */
609 hfsplus_cat_set_perms(inode, &folder->permissions);
610 folder->access_date = hfsp_ut2mt(inode_get_atime(inode));
611 folder->content_mod_date = hfsp_ut2mt(inode_get_mtime(inode));
612 folder->attribute_mod_date = hfsp_ut2mt(inode_get_ctime(inode));
613 folder->valence = cpu_to_be32(inode->i_size - 2);
614 if (folder->flags & cpu_to_be16(HFSPLUS_HAS_FOLDER_COUNT)) {
615 folder->subfolders =
616 cpu_to_be32(HFSPLUS_I(inode)->subfolders);
617 }
618 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
619 sizeof(struct hfsplus_cat_folder));
620 } else if (HFSPLUS_IS_RSRC(inode)) {
621 struct hfsplus_cat_file *file = &entry.file;
622 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
623 sizeof(struct hfsplus_cat_file));
624 hfsplus_inode_write_fork(inode, &file->rsrc_fork);
625 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
626 sizeof(struct hfsplus_cat_file));
627 } else {
628 struct hfsplus_cat_file *file = &entry.file;
629
630 if (fd.entrylength < sizeof(struct hfsplus_cat_file)) {
631 pr_err("bad catalog file entry\n");
632 res = -EIO;
633 goto out;
634 }
635 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
636 sizeof(struct hfsplus_cat_file));
637 hfsplus_inode_write_fork(inode, &file->data_fork);
638 hfsplus_cat_set_perms(inode, &file->permissions);
639 if (HFSPLUS_FLG_IMMUTABLE &
640 (file->permissions.rootflags |
641 file->permissions.userflags))
642 file->flags |= cpu_to_be16(HFSPLUS_FILE_LOCKED);
643 else
644 file->flags &= cpu_to_be16(~HFSPLUS_FILE_LOCKED);
645 file->access_date = hfsp_ut2mt(inode_get_atime(inode));
646 file->content_mod_date = hfsp_ut2mt(inode_get_mtime(inode));
647 file->attribute_mod_date = hfsp_ut2mt(inode_get_ctime(inode));
648 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
649 sizeof(struct hfsplus_cat_file));
650 }
651
652 set_bit(HFSPLUS_I_CAT_DIRTY, &HFSPLUS_I(inode)->flags);
653out:
654 hfs_find_exit(&fd);
655 return res;
656}
657
658int hfsplus_fileattr_get(struct dentry *dentry, struct fileattr *fa)
659{
660 struct inode *inode = d_inode(dentry);
661 struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
662 unsigned int flags = 0;
663
664 if (inode->i_flags & S_IMMUTABLE)
665 flags |= FS_IMMUTABLE_FL;
666 if (inode->i_flags & S_APPEND)
667 flags |= FS_APPEND_FL;
668 if (hip->userflags & HFSPLUS_FLG_NODUMP)
669 flags |= FS_NODUMP_FL;
670
671 fileattr_fill_flags(fa, flags);
672
673 return 0;
674}
675
676int hfsplus_fileattr_set(struct mnt_idmap *idmap,
677 struct dentry *dentry, struct fileattr *fa)
678{
679 struct inode *inode = d_inode(dentry);
680 struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
681 unsigned int new_fl = 0;
682
683 if (fileattr_has_fsx(fa))
684 return -EOPNOTSUPP;
685
686 /* don't silently ignore unsupported ext2 flags */
687 if (fa->flags & ~(FS_IMMUTABLE_FL|FS_APPEND_FL|FS_NODUMP_FL))
688 return -EOPNOTSUPP;
689
690 if (fa->flags & FS_IMMUTABLE_FL)
691 new_fl |= S_IMMUTABLE;
692
693 if (fa->flags & FS_APPEND_FL)
694 new_fl |= S_APPEND;
695
696 inode_set_flags(inode, new_fl, S_IMMUTABLE | S_APPEND);
697
698 if (fa->flags & FS_NODUMP_FL)
699 hip->userflags |= HFSPLUS_FLG_NODUMP;
700 else
701 hip->userflags &= ~HFSPLUS_FLG_NODUMP;
702
703 inode_set_ctime_current(inode);
704 mark_inode_dirty(inode);
705
706 return 0;
707}