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Merge remote-tracking branch 'regulator/topic/palmas' into v3.9-rc8
[mirror_ubuntu-hirsute-kernel.git] / fs / hfsplus / super.c
1 /*
2 * linux/fs/hfsplus/super.c
3 *
4 * Copyright (C) 2001
5 * Brad Boyer (flar@allandria.com)
6 * (C) 2003 Ardis Technologies <roman@ardistech.com>
7 *
8 */
9
10 #include <linux/module.h>
11 #include <linux/init.h>
12 #include <linux/pagemap.h>
13 #include <linux/blkdev.h>
14 #include <linux/fs.h>
15 #include <linux/slab.h>
16 #include <linux/vfs.h>
17 #include <linux/nls.h>
18
19 static struct inode *hfsplus_alloc_inode(struct super_block *sb);
20 static void hfsplus_destroy_inode(struct inode *inode);
21
22 #include "hfsplus_fs.h"
23 #include "xattr.h"
24
25 static int hfsplus_system_read_inode(struct inode *inode)
26 {
27 struct hfsplus_vh *vhdr = HFSPLUS_SB(inode->i_sb)->s_vhdr;
28
29 switch (inode->i_ino) {
30 case HFSPLUS_EXT_CNID:
31 hfsplus_inode_read_fork(inode, &vhdr->ext_file);
32 inode->i_mapping->a_ops = &hfsplus_btree_aops;
33 break;
34 case HFSPLUS_CAT_CNID:
35 hfsplus_inode_read_fork(inode, &vhdr->cat_file);
36 inode->i_mapping->a_ops = &hfsplus_btree_aops;
37 break;
38 case HFSPLUS_ALLOC_CNID:
39 hfsplus_inode_read_fork(inode, &vhdr->alloc_file);
40 inode->i_mapping->a_ops = &hfsplus_aops;
41 break;
42 case HFSPLUS_START_CNID:
43 hfsplus_inode_read_fork(inode, &vhdr->start_file);
44 break;
45 case HFSPLUS_ATTR_CNID:
46 hfsplus_inode_read_fork(inode, &vhdr->attr_file);
47 inode->i_mapping->a_ops = &hfsplus_btree_aops;
48 break;
49 default:
50 return -EIO;
51 }
52
53 return 0;
54 }
55
56 struct inode *hfsplus_iget(struct super_block *sb, unsigned long ino)
57 {
58 struct hfs_find_data fd;
59 struct inode *inode;
60 int err;
61
62 inode = iget_locked(sb, ino);
63 if (!inode)
64 return ERR_PTR(-ENOMEM);
65 if (!(inode->i_state & I_NEW))
66 return inode;
67
68 INIT_LIST_HEAD(&HFSPLUS_I(inode)->open_dir_list);
69 mutex_init(&HFSPLUS_I(inode)->extents_lock);
70 HFSPLUS_I(inode)->flags = 0;
71 HFSPLUS_I(inode)->extent_state = 0;
72 HFSPLUS_I(inode)->rsrc_inode = NULL;
73 atomic_set(&HFSPLUS_I(inode)->opencnt, 0);
74
75 if (inode->i_ino >= HFSPLUS_FIRSTUSER_CNID ||
76 inode->i_ino == HFSPLUS_ROOT_CNID) {
77 err = hfs_find_init(HFSPLUS_SB(inode->i_sb)->cat_tree, &fd);
78 if (!err) {
79 err = hfsplus_find_cat(inode->i_sb, inode->i_ino, &fd);
80 if (!err)
81 err = hfsplus_cat_read_inode(inode, &fd);
82 hfs_find_exit(&fd);
83 }
84 } else {
85 err = hfsplus_system_read_inode(inode);
86 }
87
88 if (err) {
89 iget_failed(inode);
90 return ERR_PTR(err);
91 }
92
93 unlock_new_inode(inode);
94 return inode;
95 }
96
97 static int hfsplus_system_write_inode(struct inode *inode)
98 {
99 struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb);
100 struct hfsplus_vh *vhdr = sbi->s_vhdr;
101 struct hfsplus_fork_raw *fork;
102 struct hfs_btree *tree = NULL;
103
104 switch (inode->i_ino) {
105 case HFSPLUS_EXT_CNID:
106 fork = &vhdr->ext_file;
107 tree = sbi->ext_tree;
108 break;
109 case HFSPLUS_CAT_CNID:
110 fork = &vhdr->cat_file;
111 tree = sbi->cat_tree;
112 break;
113 case HFSPLUS_ALLOC_CNID:
114 fork = &vhdr->alloc_file;
115 break;
116 case HFSPLUS_START_CNID:
117 fork = &vhdr->start_file;
118 break;
119 case HFSPLUS_ATTR_CNID:
120 fork = &vhdr->attr_file;
121 tree = sbi->attr_tree;
122 break;
123 default:
124 return -EIO;
125 }
126
127 if (fork->total_size != cpu_to_be64(inode->i_size)) {
128 set_bit(HFSPLUS_SB_WRITEBACKUP, &sbi->flags);
129 hfsplus_mark_mdb_dirty(inode->i_sb);
130 }
131 hfsplus_inode_write_fork(inode, fork);
132 if (tree) {
133 int err = hfs_btree_write(tree);
134 if (err) {
135 printk(KERN_ERR "hfs: b-tree write err: %d, ino %lu\n",
136 err, inode->i_ino);
137 return err;
138 }
139 }
140 return 0;
141 }
142
143 static int hfsplus_write_inode(struct inode *inode,
144 struct writeback_control *wbc)
145 {
146 int err;
147
148 dprint(DBG_INODE, "hfsplus_write_inode: %lu\n", inode->i_ino);
149
150 err = hfsplus_ext_write_extent(inode);
151 if (err)
152 return err;
153
154 if (inode->i_ino >= HFSPLUS_FIRSTUSER_CNID ||
155 inode->i_ino == HFSPLUS_ROOT_CNID)
156 return hfsplus_cat_write_inode(inode);
157 else
158 return hfsplus_system_write_inode(inode);
159 }
160
161 static void hfsplus_evict_inode(struct inode *inode)
162 {
163 dprint(DBG_INODE, "hfsplus_evict_inode: %lu\n", inode->i_ino);
164 truncate_inode_pages(&inode->i_data, 0);
165 clear_inode(inode);
166 if (HFSPLUS_IS_RSRC(inode)) {
167 HFSPLUS_I(HFSPLUS_I(inode)->rsrc_inode)->rsrc_inode = NULL;
168 iput(HFSPLUS_I(inode)->rsrc_inode);
169 }
170 }
171
172 static int hfsplus_sync_fs(struct super_block *sb, int wait)
173 {
174 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
175 struct hfsplus_vh *vhdr = sbi->s_vhdr;
176 int write_backup = 0;
177 int error, error2;
178
179 if (!wait)
180 return 0;
181
182 dprint(DBG_SUPER, "hfsplus_sync_fs\n");
183
184 /*
185 * Explicitly write out the special metadata inodes.
186 *
187 * While these special inodes are marked as hashed and written
188 * out peridocically by the flusher threads we redirty them
189 * during writeout of normal inodes, and thus the life lock
190 * prevents us from getting the latest state to disk.
191 */
192 error = filemap_write_and_wait(sbi->cat_tree->inode->i_mapping);
193 error2 = filemap_write_and_wait(sbi->ext_tree->inode->i_mapping);
194 if (!error)
195 error = error2;
196 if (sbi->attr_tree) {
197 error2 =
198 filemap_write_and_wait(sbi->attr_tree->inode->i_mapping);
199 if (!error)
200 error = error2;
201 }
202 error2 = filemap_write_and_wait(sbi->alloc_file->i_mapping);
203 if (!error)
204 error = error2;
205
206 mutex_lock(&sbi->vh_mutex);
207 mutex_lock(&sbi->alloc_mutex);
208 vhdr->free_blocks = cpu_to_be32(sbi->free_blocks);
209 vhdr->next_cnid = cpu_to_be32(sbi->next_cnid);
210 vhdr->folder_count = cpu_to_be32(sbi->folder_count);
211 vhdr->file_count = cpu_to_be32(sbi->file_count);
212
213 if (test_and_clear_bit(HFSPLUS_SB_WRITEBACKUP, &sbi->flags)) {
214 memcpy(sbi->s_backup_vhdr, sbi->s_vhdr, sizeof(*sbi->s_vhdr));
215 write_backup = 1;
216 }
217
218 error2 = hfsplus_submit_bio(sb,
219 sbi->part_start + HFSPLUS_VOLHEAD_SECTOR,
220 sbi->s_vhdr_buf, NULL, WRITE_SYNC);
221 if (!error)
222 error = error2;
223 if (!write_backup)
224 goto out;
225
226 error2 = hfsplus_submit_bio(sb,
227 sbi->part_start + sbi->sect_count - 2,
228 sbi->s_backup_vhdr_buf, NULL, WRITE_SYNC);
229 if (!error)
230 error2 = error;
231 out:
232 mutex_unlock(&sbi->alloc_mutex);
233 mutex_unlock(&sbi->vh_mutex);
234
235 if (!test_bit(HFSPLUS_SB_NOBARRIER, &sbi->flags))
236 blkdev_issue_flush(sb->s_bdev, GFP_KERNEL, NULL);
237
238 return error;
239 }
240
241 static void delayed_sync_fs(struct work_struct *work)
242 {
243 int err;
244 struct hfsplus_sb_info *sbi;
245
246 sbi = container_of(work, struct hfsplus_sb_info, sync_work.work);
247
248 spin_lock(&sbi->work_lock);
249 sbi->work_queued = 0;
250 spin_unlock(&sbi->work_lock);
251
252 err = hfsplus_sync_fs(sbi->alloc_file->i_sb, 1);
253 if (err)
254 printk(KERN_ERR "hfs: delayed sync fs err %d\n", err);
255 }
256
257 void hfsplus_mark_mdb_dirty(struct super_block *sb)
258 {
259 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
260 unsigned long delay;
261
262 if (sb->s_flags & MS_RDONLY)
263 return;
264
265 spin_lock(&sbi->work_lock);
266 if (!sbi->work_queued) {
267 delay = msecs_to_jiffies(dirty_writeback_interval * 10);
268 queue_delayed_work(system_long_wq, &sbi->sync_work, delay);
269 sbi->work_queued = 1;
270 }
271 spin_unlock(&sbi->work_lock);
272 }
273
274 static void hfsplus_put_super(struct super_block *sb)
275 {
276 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
277
278 dprint(DBG_SUPER, "hfsplus_put_super\n");
279
280 cancel_delayed_work_sync(&sbi->sync_work);
281
282 if (!(sb->s_flags & MS_RDONLY) && sbi->s_vhdr) {
283 struct hfsplus_vh *vhdr = sbi->s_vhdr;
284
285 vhdr->modify_date = hfsp_now2mt();
286 vhdr->attributes |= cpu_to_be32(HFSPLUS_VOL_UNMNT);
287 vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_INCNSTNT);
288
289 hfsplus_sync_fs(sb, 1);
290 }
291
292 hfs_btree_close(sbi->attr_tree);
293 hfs_btree_close(sbi->cat_tree);
294 hfs_btree_close(sbi->ext_tree);
295 iput(sbi->alloc_file);
296 iput(sbi->hidden_dir);
297 kfree(sbi->s_vhdr_buf);
298 kfree(sbi->s_backup_vhdr_buf);
299 unload_nls(sbi->nls);
300 kfree(sb->s_fs_info);
301 sb->s_fs_info = NULL;
302 }
303
304 static int hfsplus_statfs(struct dentry *dentry, struct kstatfs *buf)
305 {
306 struct super_block *sb = dentry->d_sb;
307 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
308 u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
309
310 buf->f_type = HFSPLUS_SUPER_MAGIC;
311 buf->f_bsize = sb->s_blocksize;
312 buf->f_blocks = sbi->total_blocks << sbi->fs_shift;
313 buf->f_bfree = sbi->free_blocks << sbi->fs_shift;
314 buf->f_bavail = buf->f_bfree;
315 buf->f_files = 0xFFFFFFFF;
316 buf->f_ffree = 0xFFFFFFFF - sbi->next_cnid;
317 buf->f_fsid.val[0] = (u32)id;
318 buf->f_fsid.val[1] = (u32)(id >> 32);
319 buf->f_namelen = HFSPLUS_MAX_STRLEN;
320
321 return 0;
322 }
323
324 static int hfsplus_remount(struct super_block *sb, int *flags, char *data)
325 {
326 if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
327 return 0;
328 if (!(*flags & MS_RDONLY)) {
329 struct hfsplus_vh *vhdr = HFSPLUS_SB(sb)->s_vhdr;
330 int force = 0;
331
332 if (!hfsplus_parse_options_remount(data, &force))
333 return -EINVAL;
334
335 if (!(vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_UNMNT))) {
336 printk(KERN_WARNING "hfs: filesystem was "
337 "not cleanly unmounted, "
338 "running fsck.hfsplus is recommended. "
339 "leaving read-only.\n");
340 sb->s_flags |= MS_RDONLY;
341 *flags |= MS_RDONLY;
342 } else if (force) {
343 /* nothing */
344 } else if (vhdr->attributes &
345 cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) {
346 printk(KERN_WARNING "hfs: filesystem is marked locked, "
347 "leaving read-only.\n");
348 sb->s_flags |= MS_RDONLY;
349 *flags |= MS_RDONLY;
350 } else if (vhdr->attributes &
351 cpu_to_be32(HFSPLUS_VOL_JOURNALED)) {
352 printk(KERN_WARNING "hfs: filesystem is "
353 "marked journaled, "
354 "leaving read-only.\n");
355 sb->s_flags |= MS_RDONLY;
356 *flags |= MS_RDONLY;
357 }
358 }
359 return 0;
360 }
361
362 static const struct super_operations hfsplus_sops = {
363 .alloc_inode = hfsplus_alloc_inode,
364 .destroy_inode = hfsplus_destroy_inode,
365 .write_inode = hfsplus_write_inode,
366 .evict_inode = hfsplus_evict_inode,
367 .put_super = hfsplus_put_super,
368 .sync_fs = hfsplus_sync_fs,
369 .statfs = hfsplus_statfs,
370 .remount_fs = hfsplus_remount,
371 .show_options = hfsplus_show_options,
372 };
373
374 static int hfsplus_fill_super(struct super_block *sb, void *data, int silent)
375 {
376 struct hfsplus_vh *vhdr;
377 struct hfsplus_sb_info *sbi;
378 hfsplus_cat_entry entry;
379 struct hfs_find_data fd;
380 struct inode *root, *inode;
381 struct qstr str;
382 struct nls_table *nls = NULL;
383 u64 last_fs_block, last_fs_page;
384 int err;
385
386 err = -ENOMEM;
387 sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
388 if (!sbi)
389 goto out;
390
391 sb->s_fs_info = sbi;
392 mutex_init(&sbi->alloc_mutex);
393 mutex_init(&sbi->vh_mutex);
394 spin_lock_init(&sbi->work_lock);
395 INIT_DELAYED_WORK(&sbi->sync_work, delayed_sync_fs);
396 hfsplus_fill_defaults(sbi);
397
398 err = -EINVAL;
399 if (!hfsplus_parse_options(data, sbi)) {
400 printk(KERN_ERR "hfs: unable to parse mount options\n");
401 goto out_unload_nls;
402 }
403
404 /* temporarily use utf8 to correctly find the hidden dir below */
405 nls = sbi->nls;
406 sbi->nls = load_nls("utf8");
407 if (!sbi->nls) {
408 printk(KERN_ERR "hfs: unable to load nls for utf8\n");
409 goto out_unload_nls;
410 }
411
412 /* Grab the volume header */
413 if (hfsplus_read_wrapper(sb)) {
414 if (!silent)
415 printk(KERN_WARNING "hfs: unable to find HFS+ superblock\n");
416 goto out_unload_nls;
417 }
418 vhdr = sbi->s_vhdr;
419
420 /* Copy parts of the volume header into the superblock */
421 sb->s_magic = HFSPLUS_VOLHEAD_SIG;
422 if (be16_to_cpu(vhdr->version) < HFSPLUS_MIN_VERSION ||
423 be16_to_cpu(vhdr->version) > HFSPLUS_CURRENT_VERSION) {
424 printk(KERN_ERR "hfs: wrong filesystem version\n");
425 goto out_free_vhdr;
426 }
427 sbi->total_blocks = be32_to_cpu(vhdr->total_blocks);
428 sbi->free_blocks = be32_to_cpu(vhdr->free_blocks);
429 sbi->next_cnid = be32_to_cpu(vhdr->next_cnid);
430 sbi->file_count = be32_to_cpu(vhdr->file_count);
431 sbi->folder_count = be32_to_cpu(vhdr->folder_count);
432 sbi->data_clump_blocks =
433 be32_to_cpu(vhdr->data_clump_sz) >> sbi->alloc_blksz_shift;
434 if (!sbi->data_clump_blocks)
435 sbi->data_clump_blocks = 1;
436 sbi->rsrc_clump_blocks =
437 be32_to_cpu(vhdr->rsrc_clump_sz) >> sbi->alloc_blksz_shift;
438 if (!sbi->rsrc_clump_blocks)
439 sbi->rsrc_clump_blocks = 1;
440
441 err = -EFBIG;
442 last_fs_block = sbi->total_blocks - 1;
443 last_fs_page = (last_fs_block << sbi->alloc_blksz_shift) >>
444 PAGE_CACHE_SHIFT;
445
446 if ((last_fs_block > (sector_t)(~0ULL) >> (sbi->alloc_blksz_shift - 9)) ||
447 (last_fs_page > (pgoff_t)(~0ULL))) {
448 printk(KERN_ERR "hfs: filesystem size too large.\n");
449 goto out_free_vhdr;
450 }
451
452 /* Set up operations so we can load metadata */
453 sb->s_op = &hfsplus_sops;
454 sb->s_maxbytes = MAX_LFS_FILESIZE;
455
456 if (!(vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_UNMNT))) {
457 printk(KERN_WARNING "hfs: Filesystem was "
458 "not cleanly unmounted, "
459 "running fsck.hfsplus is recommended. "
460 "mounting read-only.\n");
461 sb->s_flags |= MS_RDONLY;
462 } else if (test_and_clear_bit(HFSPLUS_SB_FORCE, &sbi->flags)) {
463 /* nothing */
464 } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) {
465 printk(KERN_WARNING "hfs: Filesystem is marked locked, mounting read-only.\n");
466 sb->s_flags |= MS_RDONLY;
467 } else if ((vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_JOURNALED)) &&
468 !(sb->s_flags & MS_RDONLY)) {
469 printk(KERN_WARNING "hfs: write access to "
470 "a journaled filesystem is not supported, "
471 "use the force option at your own risk, "
472 "mounting read-only.\n");
473 sb->s_flags |= MS_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 printk(KERN_ERR "hfs: 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 printk(KERN_ERR "hfs: failed to load catalog file\n");
487 goto out_close_ext_tree;
488 }
489 if (vhdr->attr_file.total_blocks != 0) {
490 sbi->attr_tree = hfs_btree_open(sb, HFSPLUS_ATTR_CNID);
491 if (!sbi->attr_tree) {
492 printk(KERN_ERR "hfs: failed to load attributes file\n");
493 goto out_close_cat_tree;
494 }
495 }
496 sb->s_xattr = hfsplus_xattr_handlers;
497
498 inode = hfsplus_iget(sb, HFSPLUS_ALLOC_CNID);
499 if (IS_ERR(inode)) {
500 printk(KERN_ERR "hfs: failed to load allocation file\n");
501 err = PTR_ERR(inode);
502 goto out_close_attr_tree;
503 }
504 sbi->alloc_file = inode;
505
506 /* Load the root directory */
507 root = hfsplus_iget(sb, HFSPLUS_ROOT_CNID);
508 if (IS_ERR(root)) {
509 printk(KERN_ERR "hfs: failed to load root directory\n");
510 err = PTR_ERR(root);
511 goto out_put_alloc_file;
512 }
513
514 sb->s_d_op = &hfsplus_dentry_operations;
515 sb->s_root = d_make_root(root);
516 if (!sb->s_root) {
517 err = -ENOMEM;
518 goto out_put_alloc_file;
519 }
520
521 str.len = sizeof(HFSP_HIDDENDIR_NAME) - 1;
522 str.name = HFSP_HIDDENDIR_NAME;
523 err = hfs_find_init(sbi->cat_tree, &fd);
524 if (err)
525 goto out_put_root;
526 hfsplus_cat_build_key(sb, fd.search_key, HFSPLUS_ROOT_CNID, &str);
527 if (!hfs_brec_read(&fd, &entry, sizeof(entry))) {
528 hfs_find_exit(&fd);
529 if (entry.type != cpu_to_be16(HFSPLUS_FOLDER))
530 goto out_put_root;
531 inode = hfsplus_iget(sb, be32_to_cpu(entry.folder.id));
532 if (IS_ERR(inode)) {
533 err = PTR_ERR(inode);
534 goto out_put_root;
535 }
536 sbi->hidden_dir = inode;
537 } else
538 hfs_find_exit(&fd);
539
540 if (!(sb->s_flags & MS_RDONLY)) {
541 /*
542 * H+LX == hfsplusutils, H+Lx == this driver, H+lx is unused
543 * all three are registered with Apple for our use
544 */
545 vhdr->last_mount_vers = cpu_to_be32(HFSP_MOUNT_VERSION);
546 vhdr->modify_date = hfsp_now2mt();
547 be32_add_cpu(&vhdr->write_count, 1);
548 vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_UNMNT);
549 vhdr->attributes |= cpu_to_be32(HFSPLUS_VOL_INCNSTNT);
550 hfsplus_sync_fs(sb, 1);
551
552 if (!sbi->hidden_dir) {
553 mutex_lock(&sbi->vh_mutex);
554 sbi->hidden_dir = hfsplus_new_inode(sb, S_IFDIR);
555 if (!sbi->hidden_dir) {
556 mutex_unlock(&sbi->vh_mutex);
557 err = -ENOMEM;
558 goto out_put_root;
559 }
560 err = hfsplus_create_cat(sbi->hidden_dir->i_ino, root,
561 &str, sbi->hidden_dir);
562 if (err) {
563 mutex_unlock(&sbi->vh_mutex);
564 goto out_put_hidden_dir;
565 }
566
567 err = hfsplus_init_inode_security(sbi->hidden_dir,
568 root, &str);
569 if (err == -EOPNOTSUPP)
570 err = 0; /* Operation is not supported. */
571 else if (err) {
572 /*
573 * Try to delete anyway without
574 * error analysis.
575 */
576 hfsplus_delete_cat(sbi->hidden_dir->i_ino,
577 root, &str);
578 mutex_unlock(&sbi->vh_mutex);
579 goto out_put_hidden_dir;
580 }
581
582 mutex_unlock(&sbi->vh_mutex);
583 hfsplus_mark_inode_dirty(sbi->hidden_dir,
584 HFSPLUS_I_CAT_DIRTY);
585 }
586 }
587
588 unload_nls(sbi->nls);
589 sbi->nls = nls;
590 return 0;
591
592 out_put_hidden_dir:
593 iput(sbi->hidden_dir);
594 out_put_root:
595 dput(sb->s_root);
596 sb->s_root = NULL;
597 out_put_alloc_file:
598 iput(sbi->alloc_file);
599 out_close_attr_tree:
600 hfs_btree_close(sbi->attr_tree);
601 out_close_cat_tree:
602 hfs_btree_close(sbi->cat_tree);
603 out_close_ext_tree:
604 hfs_btree_close(sbi->ext_tree);
605 out_free_vhdr:
606 kfree(sbi->s_vhdr_buf);
607 kfree(sbi->s_backup_vhdr_buf);
608 out_unload_nls:
609 unload_nls(sbi->nls);
610 unload_nls(nls);
611 kfree(sbi);
612 out:
613 return err;
614 }
615
616 MODULE_AUTHOR("Brad Boyer");
617 MODULE_DESCRIPTION("Extended Macintosh Filesystem");
618 MODULE_LICENSE("GPL");
619
620 static struct kmem_cache *hfsplus_inode_cachep;
621
622 static struct inode *hfsplus_alloc_inode(struct super_block *sb)
623 {
624 struct hfsplus_inode_info *i;
625
626 i = kmem_cache_alloc(hfsplus_inode_cachep, GFP_KERNEL);
627 return i ? &i->vfs_inode : NULL;
628 }
629
630 static void hfsplus_i_callback(struct rcu_head *head)
631 {
632 struct inode *inode = container_of(head, struct inode, i_rcu);
633
634 kmem_cache_free(hfsplus_inode_cachep, HFSPLUS_I(inode));
635 }
636
637 static void hfsplus_destroy_inode(struct inode *inode)
638 {
639 call_rcu(&inode->i_rcu, hfsplus_i_callback);
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,
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)
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