1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * linux/fs/hfsplus/super.c
4 *
5 * Copyright (C) 2001
6 * Brad Boyer (flar@allandria.com)
7 * (C) 2003 Ardis Technologies <roman@ardistech.com>
8 *
9 */
10
11 #include <linux/module.h>
12 #include <linux/init.h>
13 #include <linux/pagemap.h>
14 #include <linux/blkdev.h>
15 #include <linux/backing-dev.h>
16 #include <linux/fs.h>
17 #include <linux/slab.h>
18 #include <linux/vfs.h>
19 #include <linux/nls.h>
20
21 static struct inode *hfsplus_alloc_inode(struct super_block *sb);
22 static void hfsplus_free_inode(struct inode *inode);
23
24 #include "hfsplus_fs.h"
25 #include "xattr.h"
26
27 static int hfsplus_system_read_inode(struct inode *inode)
28 {
29 struct hfsplus_vh *vhdr = HFSPLUS_SB(inode->i_sb)->s_vhdr;
30
31 switch (inode->i_ino) {
32 case HFSPLUS_EXT_CNID:
33 hfsplus_inode_read_fork(inode, &vhdr->ext_file);
34 inode->i_mapping->a_ops = &hfsplus_btree_aops;
35 break;
36 case HFSPLUS_CAT_CNID:
37 hfsplus_inode_read_fork(inode, &vhdr->cat_file);
38 inode->i_mapping->a_ops = &hfsplus_btree_aops;
39 break;
40 case HFSPLUS_ALLOC_CNID:
41 hfsplus_inode_read_fork(inode, &vhdr->alloc_file);
42 inode->i_mapping->a_ops = &hfsplus_aops;
43 break;
44 case HFSPLUS_START_CNID:
45 hfsplus_inode_read_fork(inode, &vhdr->start_file);
46 break;
47 case HFSPLUS_ATTR_CNID:
48 hfsplus_inode_read_fork(inode, &vhdr->attr_file);
49 inode->i_mapping->a_ops = &hfsplus_btree_aops;
50 break;
51 default:
52 return -EIO;
53 }
54
55 return 0;
56 }
57
58 struct inode *hfsplus_iget(struct super_block *sb, unsigned long ino)
59 {
60 struct hfs_find_data fd;
61 struct inode *inode;
62 int err;
63
64 inode = iget_locked(sb, ino);
65 if (!inode)
66 return ERR_PTR(-ENOMEM);
67 if (!(inode->i_state & I_NEW))
68 return inode;
69
70 INIT_LIST_HEAD(&HFSPLUS_I(inode)->open_dir_list);
71 spin_lock_init(&HFSPLUS_I(inode)->open_dir_lock);
72 mutex_init(&HFSPLUS_I(inode)->extents_lock);
73 HFSPLUS_I(inode)->flags = 0;
74 HFSPLUS_I(inode)->extent_state = 0;
75 HFSPLUS_I(inode)->rsrc_inode = NULL;
76 atomic_set(&HFSPLUS_I(inode)->opencnt, 0);
77
78 if (inode->i_ino >= HFSPLUS_FIRSTUSER_CNID ||
79 inode->i_ino == HFSPLUS_ROOT_CNID) {
80 err = hfs_find_init(HFSPLUS_SB(inode->i_sb)->cat_tree, &fd);
81 if (!err) {
82 err = hfsplus_find_cat(inode->i_sb, inode->i_ino, &fd);
83 if (!err)
84 err = hfsplus_cat_read_inode(inode, &fd);
85 hfs_find_exit(&fd);
86 }
87 } else {
88 err = hfsplus_system_read_inode(inode);
89 }
90
91 if (err) {
92 iget_failed(inode);
93 return ERR_PTR(err);
94 }
95
96 unlock_new_inode(inode);
97 return inode;
98 }
99
100 static int hfsplus_system_write_inode(struct inode *inode)
101 {
102 struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb);
103 struct hfsplus_vh *vhdr = sbi->s_vhdr;
104 struct hfsplus_fork_raw *fork;
105 struct hfs_btree *tree = NULL;
106
107 switch (inode->i_ino) {
108 case HFSPLUS_EXT_CNID:
109 fork = &vhdr->ext_file;
110 tree = sbi->ext_tree;
111 break;
112 case HFSPLUS_CAT_CNID:
113 fork = &vhdr->cat_file;
114 tree = sbi->cat_tree;
115 break;
116 case HFSPLUS_ALLOC_CNID:
117 fork = &vhdr->alloc_file;
118 break;
119 case HFSPLUS_START_CNID:
120 fork = &vhdr->start_file;
121 break;
122 case HFSPLUS_ATTR_CNID:
123 fork = &vhdr->attr_file;
124 tree = sbi->attr_tree;
125 break;
126 default:
127 return -EIO;
128 }
129
130 if (fork->total_size != cpu_to_be64(inode->i_size)) {
131 set_bit(HFSPLUS_SB_WRITEBACKUP, &sbi->flags);
132 hfsplus_mark_mdb_dirty(inode->i_sb);
133 }
134 hfsplus_inode_write_fork(inode, fork);
135 if (tree) {
136 int err = hfs_btree_write(tree);
137
138 if (err) {
139 pr_err("b-tree write err: %d, ino %lu\n",
140 err, inode->i_ino);
141 return err;
142 }
143 }
144 return 0;
145 }
146
147 static int hfsplus_write_inode(struct inode *inode,
148 struct writeback_control *wbc)
149 {
150 int err;
151
152 hfs_dbg(INODE, "hfsplus_write_inode: %lu\n", inode->i_ino);
153
154 err = hfsplus_ext_write_extent(inode);
155 if (err)
156 return err;
157
158 if (inode->i_ino >= HFSPLUS_FIRSTUSER_CNID ||
159 inode->i_ino == HFSPLUS_ROOT_CNID)
160 return hfsplus_cat_write_inode(inode);
161 else
162 return hfsplus_system_write_inode(inode);
163 }
164
165 static void hfsplus_evict_inode(struct inode *inode)
166 {
167 hfs_dbg(INODE, "hfsplus_evict_inode: %lu\n", inode->i_ino);
168 truncate_inode_pages_final(&inode->i_data);
169 clear_inode(inode);
170 if (HFSPLUS_IS_RSRC(inode)) {
171 HFSPLUS_I(HFSPLUS_I(inode)->rsrc_inode)->rsrc_inode = NULL;
172 iput(HFSPLUS_I(inode)->rsrc_inode);
173 }
174 }
175
176 static int hfsplus_sync_fs(struct super_block *sb, int wait)
177 {
178 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
179 struct hfsplus_vh *vhdr = sbi->s_vhdr;
180 int write_backup = 0;
181 int error, error2;
182
183 if (!wait)
184 return 0;
185
186 hfs_dbg(SUPER, "hfsplus_sync_fs\n");
187
188 /*
189 * Explicitly write out the special metadata inodes.
190 *
191 * While these special inodes are marked as hashed and written
192 * out peridocically by the flusher threads we redirty them
193 * during writeout of normal inodes, and thus the life lock
194 * prevents us from getting the latest state to disk.
195 */
196 error = filemap_write_and_wait(sbi->cat_tree->inode->i_mapping);
197 error2 = filemap_write_and_wait(sbi->ext_tree->inode->i_mapping);
198 if (!error)
199 error = error2;
200 if (sbi->attr_tree) {
201 error2 =
202 filemap_write_and_wait(sbi->attr_tree->inode->i_mapping);
203 if (!error)
204 error = error2;
205 }
206 error2 = filemap_write_and_wait(sbi->alloc_file->i_mapping);
207 if (!error)
208 error = error2;
209
210 mutex_lock(&sbi->vh_mutex);
211 mutex_lock(&sbi->alloc_mutex);
212 vhdr->free_blocks = cpu_to_be32(sbi->free_blocks);
213 vhdr->next_cnid = cpu_to_be32(sbi->next_cnid);
214 vhdr->folder_count = cpu_to_be32(sbi->folder_count);
215 vhdr->file_count = cpu_to_be32(sbi->file_count);
216
217 if (test_and_clear_bit(HFSPLUS_SB_WRITEBACKUP, &sbi->flags)) {
218 memcpy(sbi->s_backup_vhdr, sbi->s_vhdr, sizeof(*sbi->s_vhdr));
219 write_backup = 1;
220 }
221
222 error2 = hfsplus_submit_bio(sb,
223 sbi->part_start + HFSPLUS_VOLHEAD_SECTOR,
224 sbi->s_vhdr_buf, NULL, REQ_OP_WRITE |
225 REQ_SYNC);
226 if (!error)
227 error = error2;
228 if (!write_backup)
229 goto out;
230
231 error2 = hfsplus_submit_bio(sb,
232 sbi->part_start + sbi->sect_count - 2,
233 sbi->s_backup_vhdr_buf, NULL, REQ_OP_WRITE |
234 REQ_SYNC);
235 if (!error)
236 error2 = error;
237 out:
238 mutex_unlock(&sbi->alloc_mutex);
239 mutex_unlock(&sbi->vh_mutex);
240
241 if (!test_bit(HFSPLUS_SB_NOBARRIER, &sbi->flags))
242 blkdev_issue_flush(sb->s_bdev);
243
244 return error;
245 }
246
247 static void delayed_sync_fs(struct work_struct *work)
248 {
249 int err;
250 struct hfsplus_sb_info *sbi;
251
252 sbi = container_of(work, struct hfsplus_sb_info, sync_work.work);
253
254 spin_lock(&sbi->work_lock);
255 sbi->work_queued = 0;
256 spin_unlock(&sbi->work_lock);
257
258 err = hfsplus_sync_fs(sbi->alloc_file->i_sb, 1);
259 if (err)
260 pr_err("delayed sync fs err %d\n", err);
261 }
262
263 void hfsplus_mark_mdb_dirty(struct super_block *sb)
264 {
265 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
266 unsigned long delay;
267
268 if (sb_rdonly(sb))
269 return;
270
271 spin_lock(&sbi->work_lock);
272 if (!sbi->work_queued) {
273 delay = msecs_to_jiffies(dirty_writeback_interval * 10);
274 queue_delayed_work(system_long_wq, &sbi->sync_work, delay);
275 sbi->work_queued = 1;
276 }
277 spin_unlock(&sbi->work_lock);
278 }
279
280 static void delayed_free(struct rcu_head *p)
281 {
282 struct hfsplus_sb_info *sbi = container_of(p, struct hfsplus_sb_info, rcu);
283
284 unload_nls(sbi->nls);
285 kfree(sbi);
286 }
287
288 static void hfsplus_put_super(struct super_block *sb)
289 {
290 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
291
292 hfs_dbg(SUPER, "hfsplus_put_super\n");
293
294 cancel_delayed_work_sync(&sbi->sync_work);
295
296 if (!sb_rdonly(sb) && sbi->s_vhdr) {
297 struct hfsplus_vh *vhdr = sbi->s_vhdr;
298
299 vhdr->modify_date = hfsp_now2mt();
300 vhdr->attributes |= cpu_to_be32(HFSPLUS_VOL_UNMNT);
301 vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_INCNSTNT);
302
303 hfsplus_sync_fs(sb, 1);
304 }
305
306 iput(sbi->alloc_file);
307 iput(sbi->hidden_dir);
308 hfs_btree_close(sbi->attr_tree);
309 hfs_btree_close(sbi->cat_tree);
310 hfs_btree_close(sbi->ext_tree);
311 kfree(sbi->s_vhdr_buf);
312 kfree(sbi->s_backup_vhdr_buf);
313 call_rcu(&sbi->rcu, delayed_free);
314 }
315
316 static int hfsplus_statfs(struct dentry *dentry, struct kstatfs *buf)
317 {
318 struct super_block *sb = dentry->d_sb;
319 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
320 u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
321
322 buf->f_type = HFSPLUS_SUPER_MAGIC;
323 buf->f_bsize = sb->s_blocksize;
324 buf->f_blocks = sbi->total_blocks << sbi->fs_shift;
325 buf->f_bfree = sbi->free_blocks << sbi->fs_shift;
326 buf->f_bavail = buf->f_bfree;
327 buf->f_files = 0xFFFFFFFF;
328 buf->f_ffree = 0xFFFFFFFF - sbi->next_cnid;
329 buf->f_fsid = u64_to_fsid(id);
330 buf->f_namelen = HFSPLUS_MAX_STRLEN;
331
332 return 0;
333 }
334
335 static int hfsplus_remount(struct super_block *sb, int *flags, char *data)
336 {
337 sync_filesystem(sb);
338 if ((bool)(*flags & SB_RDONLY) == sb_rdonly(sb))
339 return 0;
340 if (!(*flags & SB_RDONLY)) {
341 struct hfsplus_vh *vhdr = HFSPLUS_SB(sb)->s_vhdr;
342 int force = 0;
343
344 if (!hfsplus_parse_options_remount(data, &force))
345 return -EINVAL;
346
347 if (!(vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_UNMNT))) {
348 pr_warn("filesystem was not cleanly unmounted, running fsck.hfsplus is recommended. leaving read-only.\n");
349 sb->s_flags |= SB_RDONLY;
350 *flags |= SB_RDONLY;
351 } else if (force) {
352 /* nothing */
353 } else if (vhdr->attributes &
354 cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) {
355 pr_warn("filesystem is marked locked, leaving read-only.\n");
356 sb->s_flags |= SB_RDONLY;
357 *flags |= SB_RDONLY;
358 } else if (vhdr->attributes &
359 cpu_to_be32(HFSPLUS_VOL_JOURNALED)) {
360 pr_warn("filesystem is marked journaled, leaving read-only.\n");
361 sb->s_flags |= SB_RDONLY;
362 *flags |= SB_RDONLY;
363 }
364 }
365 return 0;
366 }
367
368 static const struct super_operations hfsplus_sops = {
369 .alloc_inode = hfsplus_alloc_inode,
370 .free_inode = hfsplus_free_inode,
371 .write_inode = hfsplus_write_inode,
372 .evict_inode = hfsplus_evict_inode,
373 .put_super = hfsplus_put_super,
374 .sync_fs = hfsplus_sync_fs,
375 .statfs = hfsplus_statfs,
376 .remount_fs = hfsplus_remount,
377 .show_options = hfsplus_show_options,
378 };
379
380 static int hfsplus_fill_super(struct super_block *sb, void *data, int silent)
381 {
382 struct hfsplus_vh *vhdr;
383 struct hfsplus_sb_info *sbi;
384 hfsplus_cat_entry entry;
385 struct hfs_find_data fd;
386 struct inode *root, *inode;
387 struct qstr str;
388 struct nls_table *nls = NULL;
389 u64 last_fs_block, last_fs_page;
390 int err;
391
392 err = -ENOMEM;
393 sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
394 if (!sbi)
395 goto out;
396
397 sb->s_fs_info = sbi;
398 mutex_init(&sbi->alloc_mutex);
399 mutex_init(&sbi->vh_mutex);
400 spin_lock_init(&sbi->work_lock);
401 INIT_DELAYED_WORK(&sbi->sync_work, delayed_sync_fs);
402 hfsplus_fill_defaults(sbi);
403
404 err = -EINVAL;
405 if (!hfsplus_parse_options(data, sbi)) {
406 pr_err("unable to parse mount options\n");
407 goto out_unload_nls;
408 }
409
410 /* temporarily use utf8 to correctly find the hidden dir below */
411 nls = sbi->nls;
412 sbi->nls = load_nls("utf8");
413 if (!sbi->nls) {
414 pr_err("unable to load nls for utf8\n");
415 goto out_unload_nls;
416 }
417
418 /* Grab the volume header */
419 if (hfsplus_read_wrapper(sb)) {
420 if (!silent)
421 pr_warn("unable to find HFS+ superblock\n");
422 goto out_unload_nls;
423 }
424 vhdr = sbi->s_vhdr;
425
426 /* Copy parts of the volume header into the superblock */
427 sb->s_magic = HFSPLUS_VOLHEAD_SIG;
428 if (be16_to_cpu(vhdr->version) < HFSPLUS_MIN_VERSION ||
429 be16_to_cpu(vhdr->version) > HFSPLUS_CURRENT_VERSION) {
430 pr_err("wrong filesystem version\n");
431 goto out_free_vhdr;
432 }
433 sbi->total_blocks = be32_to_cpu(vhdr->total_blocks);
434 sbi->free_blocks = be32_to_cpu(vhdr->free_blocks);
435 sbi->next_cnid = be32_to_cpu(vhdr->next_cnid);
436 sbi->file_count = be32_to_cpu(vhdr->file_count);
437 sbi->folder_count = be32_to_cpu(vhdr->folder_count);
438 sbi->data_clump_blocks =
439 be32_to_cpu(vhdr->data_clump_sz) >> sbi->alloc_blksz_shift;
440 if (!sbi->data_clump_blocks)
441 sbi->data_clump_blocks = 1;
442 sbi->rsrc_clump_blocks =
443 be32_to_cpu(vhdr->rsrc_clump_sz) >> sbi->alloc_blksz_shift;
444 if (!sbi->rsrc_clump_blocks)
445 sbi->rsrc_clump_blocks = 1;
446
447 err = -EFBIG;
448 last_fs_block = sbi->total_blocks - 1;
449 last_fs_page = (last_fs_block << sbi->alloc_blksz_shift) >>
450 PAGE_SHIFT;
451
452 if ((last_fs_block > (sector_t)(~0ULL) >> (sbi->alloc_blksz_shift - 9)) ||
453 (last_fs_page > (pgoff_t)(~0ULL))) {
454 pr_err("filesystem size too large\n");
455 goto out_free_vhdr;
456 }
457
458 /* Set up operations so we can load metadata */
459 sb->s_op = &hfsplus_sops;
460 sb->s_maxbytes = MAX_LFS_FILESIZE;
461
462 if (!(vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_UNMNT))) {
463 pr_warn("Filesystem was not cleanly unmounted, running fsck.hfsplus is recommended. mounting read-only.\n");
464 sb->s_flags |= SB_RDONLY;
465 } else if (test_and_clear_bit(HFSPLUS_SB_FORCE, &sbi->flags)) {
466 /* nothing */
467 } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) {
468 pr_warn("Filesystem is marked locked, mounting read-only.\n");
469 sb->s_flags |= SB_RDONLY;
470 } else if ((vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_JOURNALED)) &&
471 !sb_rdonly(sb)) {
472 pr_warn("write access to a journaled filesystem is not supported, use the force option at your own risk, mounting read-only.\n");
473 sb->s_flags |= SB_RDONLY;
474 }
475
476 err = -EINVAL;
477
478 /* Load metadata objects (B*Trees) */
479 sbi->ext_tree = hfs_btree_open(sb, HFSPLUS_EXT_CNID);
480 if (!sbi->ext_tree) {
481 pr_err("failed to load extents file\n");
482 goto out_free_vhdr;
483 }
484 sbi->cat_tree = hfs_btree_open(sb, HFSPLUS_CAT_CNID);
485 if (!sbi->cat_tree) {
486 pr_err("failed to load catalog file\n");
487 goto out_close_ext_tree;
488 }
489 atomic_set(&sbi->attr_tree_state, HFSPLUS_EMPTY_ATTR_TREE);
490 if (vhdr->attr_file.total_blocks != 0) {
491 sbi->attr_tree = hfs_btree_open(sb, HFSPLUS_ATTR_CNID);
492 if (!sbi->attr_tree) {
493 pr_err("failed to load attributes file\n");
494 goto out_close_cat_tree;
495 }
496 atomic_set(&sbi->attr_tree_state, HFSPLUS_VALID_ATTR_TREE);
497 }
498 sb->s_xattr = hfsplus_xattr_handlers;
499
500 inode = hfsplus_iget(sb, HFSPLUS_ALLOC_CNID);
501 if (IS_ERR(inode)) {
502 pr_err("failed to load allocation file\n");
503 err = PTR_ERR(inode);
504 goto out_close_attr_tree;
505 }
506 sbi->alloc_file = inode;
507
508 /* Load the root directory */
509 root = hfsplus_iget(sb, HFSPLUS_ROOT_CNID);
510 if (IS_ERR(root)) {
511 pr_err("failed to load root directory\n");
512 err = PTR_ERR(root);
513 goto out_put_alloc_file;
514 }
515
516 sb->s_d_op = &hfsplus_dentry_operations;
517 sb->s_root = d_make_root(root);
518 if (!sb->s_root) {
519 err = -ENOMEM;
520 goto out_put_alloc_file;
521 }
522
523 str.len = sizeof(HFSP_HIDDENDIR_NAME) - 1;
524 str.name = HFSP_HIDDENDIR_NAME;
525 err = hfs_find_init(sbi->cat_tree, &fd);
526 if (err)
527 goto out_put_root;
528 err = hfsplus_cat_build_key(sb, fd.search_key, HFSPLUS_ROOT_CNID, &str);
529 if (unlikely(err < 0))
530 goto out_put_root;
531 if (!hfs_brec_read(&fd, &entry, sizeof(entry))) {
532 hfs_find_exit(&fd);
533 if (entry.type != cpu_to_be16(HFSPLUS_FOLDER)) {
534 err = -EINVAL;
535 goto out_put_root;
536 }
537 inode = hfsplus_iget(sb, be32_to_cpu(entry.folder.id));
538 if (IS_ERR(inode)) {
539 err = PTR_ERR(inode);
540 goto out_put_root;
541 }
542 sbi->hidden_dir = inode;
543 } else
544 hfs_find_exit(&fd);
545
546 if (!sb_rdonly(sb)) {
547 /*
548 * H+LX == hfsplusutils, H+Lx == this driver, H+lx is unused
549 * all three are registered with Apple for our use
550 */
551 vhdr->last_mount_vers = cpu_to_be32(HFSP_MOUNT_VERSION);
552 vhdr->modify_date = hfsp_now2mt();
553 be32_add_cpu(&vhdr->write_count, 1);
554 vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_UNMNT);
555 vhdr->attributes |= cpu_to_be32(HFSPLUS_VOL_INCNSTNT);
556 hfsplus_sync_fs(sb, 1);
557
558 if (!sbi->hidden_dir) {
559 mutex_lock(&sbi->vh_mutex);
560 sbi->hidden_dir = hfsplus_new_inode(sb, root, S_IFDIR);
561 if (!sbi->hidden_dir) {
562 mutex_unlock(&sbi->vh_mutex);
563 err = -ENOMEM;
564 goto out_put_root;
565 }
566 err = hfsplus_create_cat(sbi->hidden_dir->i_ino, root,
567 &str, sbi->hidden_dir);
568 if (err) {
569 mutex_unlock(&sbi->vh_mutex);
570 goto out_put_hidden_dir;
571 }
572
573 err = hfsplus_init_security(sbi->hidden_dir,
574 root, &str);
575 if (err == -EOPNOTSUPP)
576 err = 0; /* Operation is not supported. */
577 else if (err) {
578 /*
579 * Try to delete anyway without
580 * error analysis.
581 */
582 hfsplus_delete_cat(sbi->hidden_dir->i_ino,
583 root, &str);
584 mutex_unlock(&sbi->vh_mutex);
585 goto out_put_hidden_dir;
586 }
587
588 mutex_unlock(&sbi->vh_mutex);
589 hfsplus_mark_inode_dirty(sbi->hidden_dir,
590 HFSPLUS_I_CAT_DIRTY);
591 }
592 }
593
594 unload_nls(sbi->nls);
595 sbi->nls = nls;
596 return 0;
597
598 out_put_hidden_dir:
599 cancel_delayed_work_sync(&sbi->sync_work);
600 iput(sbi->hidden_dir);
601 out_put_root:
602 dput(sb->s_root);
603 sb->s_root = NULL;
604 out_put_alloc_file:
605 iput(sbi->alloc_file);
606 out_close_attr_tree:
607 hfs_btree_close(sbi->attr_tree);
608 out_close_cat_tree:
609 hfs_btree_close(sbi->cat_tree);
610 out_close_ext_tree:
611 hfs_btree_close(sbi->ext_tree);
612 out_free_vhdr:
613 kfree(sbi->s_vhdr_buf);
614 kfree(sbi->s_backup_vhdr_buf);
615 out_unload_nls:
616 unload_nls(sbi->nls);
617 unload_nls(nls);
618 kfree(sbi);
619 out:
620 return err;
621 }
622
623 MODULE_AUTHOR("Brad Boyer");
624 MODULE_DESCRIPTION("Extended Macintosh Filesystem");
625 MODULE_LICENSE("GPL");
626
627 static struct kmem_cache *hfsplus_inode_cachep;
628
629 static struct inode *hfsplus_alloc_inode(struct super_block *sb)
630 {
631 struct hfsplus_inode_info *i;
632
633 i = alloc_inode_sb(sb, hfsplus_inode_cachep, GFP_KERNEL);
634 return i ? &i->vfs_inode : NULL;
635 }
636
637 static void hfsplus_free_inode(struct inode *inode)
638 {
639 kmem_cache_free(hfsplus_inode_cachep, HFSPLUS_I(inode));
640 }
641
642 #define HFSPLUS_INODE_SIZE sizeof(struct hfsplus_inode_info)
643
644 static struct dentry *hfsplus_mount(struct file_system_type *fs_type,
645 int flags, const char *dev_name, void *data)
646 {
647 return mount_bdev(fs_type, flags, dev_name, data, hfsplus_fill_super);
648 }
649
650 static struct file_system_type hfsplus_fs_type = {
651 .owner = THIS_MODULE,
652 .name = "hfsplus",
653 .mount = hfsplus_mount,
654 .kill_sb = kill_block_super,
655 .fs_flags = FS_REQUIRES_DEV,
656 };
657 MODULE_ALIAS_FS("hfsplus");
658
659 static void hfsplus_init_once(void *p)
660 {
661 struct hfsplus_inode_info *i = p;
662
663 inode_init_once(&i->vfs_inode);
664 }
665
666 static int __init init_hfsplus_fs(void)
667 {
668 int err;
669
670 hfsplus_inode_cachep = kmem_cache_create("hfsplus_icache",
671 HFSPLUS_INODE_SIZE, 0, SLAB_HWCACHE_ALIGN|SLAB_ACCOUNT,
672 hfsplus_init_once);
673 if (!hfsplus_inode_cachep)
674 return -ENOMEM;
675 err = hfsplus_create_attr_tree_cache();
676 if (err)
677 goto destroy_inode_cache;
678 err = register_filesystem(&hfsplus_fs_type);
679 if (err)
680 goto destroy_attr_tree_cache;
681 return 0;
682
683 destroy_attr_tree_cache:
684 hfsplus_destroy_attr_tree_cache();
685
686 destroy_inode_cache:
687 kmem_cache_destroy(hfsplus_inode_cachep);
688
689 return err;
690 }
691
692 static void __exit exit_hfsplus_fs(void)
693 {
694 unregister_filesystem(&hfsplus_fs_type);
695
696 /*
697 * Make sure all delayed rcu free inodes are flushed before we
698 * destroy cache.
699 */
700 rcu_barrier();
701 hfsplus_destroy_attr_tree_cache();
702 kmem_cache_destroy(hfsplus_inode_cachep);
703 }
704
705 module_init(init_hfsplus_fs)
706 module_exit(exit_hfsplus_fs)
707
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