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
hfsplus_read_folio(struct file * file,struct folio * folio)26 static int hfsplus_read_folio(struct file *file, struct folio *folio)
27 {
28 return block_read_full_folio(folio, hfsplus_get_block);
29 }
30
hfsplus_write_failed(struct address_space * mapping,loff_t to)31 static 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
hfsplus_write_begin(struct file * file,struct address_space * mapping,loff_t pos,unsigned len,struct folio ** foliop,void ** fsdata)41 int hfsplus_write_begin(struct file *file, struct address_space *mapping,
42 loff_t pos, unsigned len, struct folio **foliop, void **fsdata)
43 {
44 int ret;
45
46 ret = cont_write_begin(file, mapping, pos, len, foliop, fsdata,
47 hfsplus_get_block,
48 &HFSPLUS_I(mapping->host)->phys_size);
49 if (unlikely(ret))
50 hfsplus_write_failed(mapping, pos + len);
51
52 return ret;
53 }
54
hfsplus_bmap(struct address_space * mapping,sector_t block)55 static sector_t hfsplus_bmap(struct address_space *mapping, sector_t block)
56 {
57 return generic_block_bmap(mapping, block, hfsplus_get_block);
58 }
59
hfsplus_release_folio(struct folio * folio,gfp_t mask)60 static bool hfsplus_release_folio(struct folio *folio, gfp_t mask)
61 {
62 struct inode *inode = folio->mapping->host;
63 struct super_block *sb = inode->i_sb;
64 struct hfs_btree *tree;
65 struct hfs_bnode *node;
66 u32 nidx;
67 int i;
68 bool res = true;
69
70 switch (inode->i_ino) {
71 case HFSPLUS_EXT_CNID:
72 tree = HFSPLUS_SB(sb)->ext_tree;
73 break;
74 case HFSPLUS_CAT_CNID:
75 tree = HFSPLUS_SB(sb)->cat_tree;
76 break;
77 case HFSPLUS_ATTR_CNID:
78 tree = HFSPLUS_SB(sb)->attr_tree;
79 break;
80 default:
81 BUG();
82 return false;
83 }
84 if (!tree)
85 return false;
86 if (tree->node_size >= PAGE_SIZE) {
87 nidx = folio->index >>
88 (tree->node_size_shift - PAGE_SHIFT);
89 spin_lock(&tree->hash_lock);
90 node = hfs_bnode_findhash(tree, nidx);
91 if (!node)
92 ;
93 else if (atomic_read(&node->refcnt))
94 res = false;
95 if (res && node) {
96 hfs_bnode_unhash(node);
97 hfs_bnode_free(node);
98 }
99 spin_unlock(&tree->hash_lock);
100 } else {
101 nidx = folio->index <<
102 (PAGE_SHIFT - tree->node_size_shift);
103 i = 1 << (PAGE_SHIFT - tree->node_size_shift);
104 spin_lock(&tree->hash_lock);
105 do {
106 node = hfs_bnode_findhash(tree, nidx++);
107 if (!node)
108 continue;
109 if (atomic_read(&node->refcnt)) {
110 res = false;
111 break;
112 }
113 hfs_bnode_unhash(node);
114 hfs_bnode_free(node);
115 } while (--i && nidx < tree->node_count);
116 spin_unlock(&tree->hash_lock);
117 }
118 return res ? try_to_free_buffers(folio) : false;
119 }
120
hfsplus_direct_IO(struct kiocb * iocb,struct iov_iter * iter)121 static ssize_t hfsplus_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
122 {
123 struct file *file = iocb->ki_filp;
124 struct address_space *mapping = file->f_mapping;
125 struct inode *inode = mapping->host;
126 size_t count = iov_iter_count(iter);
127 ssize_t ret;
128
129 ret = blockdev_direct_IO(iocb, inode, iter, hfsplus_get_block);
130
131 /*
132 * In case of error extending write may have instantiated a few
133 * blocks outside i_size. Trim these off again.
134 */
135 if (unlikely(iov_iter_rw(iter) == WRITE && ret < 0)) {
136 loff_t isize = i_size_read(inode);
137 loff_t end = iocb->ki_pos + count;
138
139 if (end > isize)
140 hfsplus_write_failed(mapping, end);
141 }
142
143 return ret;
144 }
145
hfsplus_writepages(struct address_space * mapping,struct writeback_control * wbc)146 static int hfsplus_writepages(struct address_space *mapping,
147 struct writeback_control *wbc)
148 {
149 return mpage_writepages(mapping, wbc, hfsplus_get_block);
150 }
151
152 const struct address_space_operations hfsplus_btree_aops = {
153 .dirty_folio = block_dirty_folio,
154 .invalidate_folio = block_invalidate_folio,
155 .read_folio = hfsplus_read_folio,
156 .writepages = hfsplus_writepages,
157 .write_begin = hfsplus_write_begin,
158 .write_end = generic_write_end,
159 .migrate_folio = buffer_migrate_folio,
160 .bmap = hfsplus_bmap,
161 .release_folio = hfsplus_release_folio,
162 };
163
164 const struct address_space_operations hfsplus_aops = {
165 .dirty_folio = block_dirty_folio,
166 .invalidate_folio = block_invalidate_folio,
167 .read_folio = hfsplus_read_folio,
168 .write_begin = hfsplus_write_begin,
169 .write_end = generic_write_end,
170 .bmap = hfsplus_bmap,
171 .direct_IO = hfsplus_direct_IO,
172 .writepages = hfsplus_writepages,
173 .migrate_folio = buffer_migrate_folio,
174 };
175
176 const struct dentry_operations hfsplus_dentry_operations = {
177 .d_hash = hfsplus_hash_dentry,
178 .d_compare = hfsplus_compare_dentry,
179 };
180
hfsplus_get_perms(struct inode * inode,struct hfsplus_perm * perms,int dir)181 static 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 ((test_bit(HFSPLUS_SB_UID, &sbi->flags)) || (!i_uid_read(inode) && !mode))
191 inode->i_uid = sbi->uid;
192
193 i_gid_write(inode, be32_to_cpu(perms->group));
194 if ((test_bit(HFSPLUS_SB_GID, &sbi->flags)) || (!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
hfsplus_file_open(struct inode * inode,struct file * file)215 static 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
hfsplus_file_release(struct inode * inode,struct file * file)225 static 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
hfsplus_setattr(struct mnt_idmap * idmap,struct dentry * dentry,struct iattr * attr)244 static int hfsplus_setattr(struct mnt_idmap *idmap,
245 struct dentry *dentry, struct iattr *attr)
246 {
247 struct inode *inode = d_inode(dentry);
248 int error;
249
250 error = setattr_prepare(&nop_mnt_idmap, dentry, attr);
251 if (error)
252 return error;
253
254 if ((attr->ia_valid & ATTR_SIZE) &&
255 attr->ia_size != i_size_read(inode)) {
256 inode_dio_wait(inode);
257 if (attr->ia_size > inode->i_size) {
258 error = generic_cont_expand_simple(inode,
259 attr->ia_size);
260 if (error)
261 return error;
262 }
263 truncate_setsize(inode, attr->ia_size);
264 hfsplus_file_truncate(inode);
265 inode_set_mtime_to_ts(inode, inode_set_ctime_current(inode));
266 }
267
268 setattr_copy(&nop_mnt_idmap, inode, attr);
269 mark_inode_dirty(inode);
270
271 return 0;
272 }
273
hfsplus_getattr(struct mnt_idmap * idmap,const struct path * path,struct kstat * stat,u32 request_mask,unsigned int query_flags)274 int hfsplus_getattr(struct mnt_idmap *idmap, const struct path *path,
275 struct kstat *stat, u32 request_mask,
276 unsigned int query_flags)
277 {
278 struct inode *inode = d_inode(path->dentry);
279 struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
280
281 if (request_mask & STATX_BTIME) {
282 stat->result_mask |= STATX_BTIME;
283 stat->btime = hfsp_mt2ut(hip->create_date);
284 }
285
286 if (inode->i_flags & S_APPEND)
287 stat->attributes |= STATX_ATTR_APPEND;
288 if (inode->i_flags & S_IMMUTABLE)
289 stat->attributes |= STATX_ATTR_IMMUTABLE;
290 if (hip->userflags & HFSPLUS_FLG_NODUMP)
291 stat->attributes |= STATX_ATTR_NODUMP;
292
293 stat->attributes_mask |= STATX_ATTR_APPEND | STATX_ATTR_IMMUTABLE |
294 STATX_ATTR_NODUMP;
295
296 generic_fillattr(&nop_mnt_idmap, request_mask, inode, stat);
297 return 0;
298 }
299
hfsplus_file_fsync(struct file * file,loff_t start,loff_t end,int datasync)300 int hfsplus_file_fsync(struct file *file, loff_t start, loff_t end,
301 int datasync)
302 {
303 struct inode *inode = file->f_mapping->host;
304 struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
305 struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb);
306 int error = 0, error2;
307
308 error = file_write_and_wait_range(file, start, end);
309 if (error)
310 return error;
311 inode_lock(inode);
312
313 /*
314 * Sync inode metadata into the catalog and extent trees.
315 */
316 sync_inode_metadata(inode, 1);
317
318 /*
319 * And explicitly write out the btrees.
320 */
321 if (test_and_clear_bit(HFSPLUS_I_CAT_DIRTY, &hip->flags))
322 error = filemap_write_and_wait(sbi->cat_tree->inode->i_mapping);
323
324 if (test_and_clear_bit(HFSPLUS_I_EXT_DIRTY, &hip->flags)) {
325 error2 =
326 filemap_write_and_wait(sbi->ext_tree->inode->i_mapping);
327 if (!error)
328 error = error2;
329 }
330
331 if (test_and_clear_bit(HFSPLUS_I_ATTR_DIRTY, &hip->flags)) {
332 if (sbi->attr_tree) {
333 error2 =
334 filemap_write_and_wait(
335 sbi->attr_tree->inode->i_mapping);
336 if (!error)
337 error = error2;
338 } else {
339 pr_err("sync non-existent attributes tree\n");
340 }
341 }
342
343 if (test_and_clear_bit(HFSPLUS_I_ALLOC_DIRTY, &hip->flags)) {
344 error2 = filemap_write_and_wait(sbi->alloc_file->i_mapping);
345 if (!error)
346 error = error2;
347 }
348
349 if (!test_bit(HFSPLUS_SB_NOBARRIER, &sbi->flags))
350 blkdev_issue_flush(inode->i_sb->s_bdev);
351
352 inode_unlock(inode);
353
354 return error;
355 }
356
357 static const struct inode_operations hfsplus_file_inode_operations = {
358 .setattr = hfsplus_setattr,
359 .getattr = hfsplus_getattr,
360 .listxattr = hfsplus_listxattr,
361 .fileattr_get = hfsplus_fileattr_get,
362 .fileattr_set = hfsplus_fileattr_set,
363 };
364
365 static const struct file_operations hfsplus_file_operations = {
366 .llseek = generic_file_llseek,
367 .read_iter = generic_file_read_iter,
368 .write_iter = generic_file_write_iter,
369 .mmap = generic_file_mmap,
370 .splice_read = filemap_splice_read,
371 .splice_write = iter_file_splice_write,
372 .fsync = hfsplus_file_fsync,
373 .open = hfsplus_file_open,
374 .release = hfsplus_file_release,
375 .unlocked_ioctl = hfsplus_ioctl,
376 };
377
hfsplus_new_inode(struct super_block * sb,struct inode * dir,umode_t mode)378 struct 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
hfsplus_delete_inode(struct inode * inode)437 void 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
hfsplus_inode_read_fork(struct inode * inode,struct hfsplus_fork_raw * fork)459 void 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
hfsplus_inode_write_fork(struct inode * inode,struct hfsplus_fork_raw * fork)489 void 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
hfsplus_cat_read_inode(struct inode * inode,struct hfs_find_data * fd)498 int 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 }
573 out:
574 return res;
575 }
576
hfsplus_cat_write_inode(struct inode * inode)577 int 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);
653 out:
654 hfs_find_exit(&fd);
655 return res;
656 }
657
hfsplus_fileattr_get(struct dentry * dentry,struct fileattr * fa)658 int 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
hfsplus_fileattr_set(struct mnt_idmap * idmap,struct dentry * dentry,struct fileattr * fa)676 int 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 }
708