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_writepage(struct page * page,struct writeback_control * wbc)31 static int hfsplus_writepage(struct page *page, struct writeback_control *wbc)
32 {
33 return block_write_full_page(page, hfsplus_get_block, wbc);
34 }
35
hfsplus_write_failed(struct address_space * mapping,loff_t to)36 static 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
hfsplus_write_begin(struct file * file,struct address_space * mapping,loff_t pos,unsigned len,struct page ** pagep,void ** fsdata)46 int 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
hfsplus_bmap(struct address_space * mapping,sector_t block)61 static sector_t hfsplus_bmap(struct address_space *mapping, sector_t block)
62 {
63 return generic_block_bmap(mapping, block, hfsplus_get_block);
64 }
65
hfsplus_release_folio(struct folio * folio,gfp_t mask)66 static 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
hfsplus_direct_IO(struct kiocb * iocb,struct iov_iter * iter)127 static 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
hfsplus_writepages(struct address_space * mapping,struct writeback_control * wbc)152 static int hfsplus_writepages(struct address_space *mapping,
153 struct writeback_control *wbc)
154 {
155 return mpage_writepages(mapping, wbc, hfsplus_get_block);
156 }
157
158 const 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
169 const 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 .writepage = hfsplus_writepage,
174 .write_begin = hfsplus_write_begin,
175 .write_end = generic_write_end,
176 .bmap = hfsplus_bmap,
177 .direct_IO = hfsplus_direct_IO,
178 .writepages = hfsplus_writepages,
179 };
180
181 const struct dentry_operations hfsplus_dentry_operations = {
182 .d_hash = hfsplus_hash_dentry,
183 .d_compare = hfsplus_compare_dentry,
184 };
185
hfsplus_get_perms(struct inode * inode,struct hfsplus_perm * perms,int dir)186 static 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 (!i_uid_read(inode) && !mode)
196 inode->i_uid = sbi->uid;
197
198 i_gid_write(inode, be32_to_cpu(perms->group));
199 if (!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
hfsplus_file_open(struct inode * inode,struct file * file)220 static 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
hfsplus_file_release(struct inode * inode,struct file * file)230 static 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
hfsplus_setattr(struct user_namespace * mnt_userns,struct dentry * dentry,struct iattr * attr)249 static 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
hfsplus_getattr(struct user_namespace * mnt_userns,const struct path * path,struct kstat * stat,u32 request_mask,unsigned int query_flags)279 int 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
hfsplus_file_fsync(struct file * file,loff_t start,loff_t end,int datasync)305 int 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
362 static 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
370 static 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
hfsplus_new_inode(struct super_block * sb,struct inode * dir,umode_t mode)382 struct 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
hfsplus_delete_inode(struct inode * inode)441 void 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
hfsplus_inode_read_fork(struct inode * inode,struct hfsplus_fork_raw * fork)463 void 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
hfsplus_inode_write_fork(struct inode * inode,struct hfsplus_fork_raw * fork)493 void 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
hfsplus_cat_read_inode(struct inode * inode,struct hfs_find_data * fd)502 int 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
hfsplus_cat_write_inode(struct inode * inode)568 int 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);
635 out:
636 hfs_find_exit(&fd);
637 return 0;
638 }
639
hfsplus_fileattr_get(struct dentry * dentry,struct fileattr * fa)640 int 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
hfsplus_fileattr_set(struct user_namespace * mnt_userns,struct dentry * dentry,struct fileattr * fa)658 int 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 }
690