?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
printf: Remove unused 'bprintf'
[drm/drm-misc.git] / fs / hfsplus / super.c
blob948b8aaee33e3aa5822f3bf8adc9f0764405a445
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/fs_context.h>
18 #include <linux/slab.h>
19 #include <linux/vfs.h>
20 #include <linux/nls.h>
21
22 static struct inode *hfsplus_alloc_inode(struct super_block *sb);
23 static void hfsplus_free_inode(struct inode *inode);
24
25 #include "hfsplus_fs.h"
26 #include "xattr.h"
27
28 static int hfsplus_system_read_inode(struct inode *inode)
29 {
30 struct hfsplus_vh *vhdr = HFSPLUS_SB(inode->i_sb)->s_vhdr;
31
32 switch (inode->i_ino) {
33 case HFSPLUS_EXT_CNID:
34 hfsplus_inode_read_fork(inode, &vhdr->ext_file);
35 inode->i_mapping->a_ops = &hfsplus_btree_aops;
36 break;
37 case HFSPLUS_CAT_CNID:
38 hfsplus_inode_read_fork(inode, &vhdr->cat_file);
39 inode->i_mapping->a_ops = &hfsplus_btree_aops;
40 break;
41 case HFSPLUS_ALLOC_CNID:
42 hfsplus_inode_read_fork(inode, &vhdr->alloc_file);
43 inode->i_mapping->a_ops = &hfsplus_aops;
44 break;
45 case HFSPLUS_START_CNID:
46 hfsplus_inode_read_fork(inode, &vhdr->start_file);
47 break;
48 case HFSPLUS_ATTR_CNID:
49 hfsplus_inode_read_fork(inode, &vhdr->attr_file);
50 inode->i_mapping->a_ops = &hfsplus_btree_aops;
51 break;
52 default:
53 return -EIO;
54 }
55
56 return 0;
57 }
58
59 struct inode *hfsplus_iget(struct super_block *sb, unsigned long ino)
60 {
61 struct hfs_find_data fd;
62 struct inode *inode;
63 int err;
64
65 inode = iget_locked(sb, ino);
66 if (!inode)
67 return ERR_PTR(-ENOMEM);
68 if (!(inode->i_state & I_NEW))
69 return inode;
70
71 INIT_LIST_HEAD(&HFSPLUS_I(inode)->open_dir_list);
72 spin_lock_init(&HFSPLUS_I(inode)->open_dir_lock);
73 mutex_init(&HFSPLUS_I(inode)->extents_lock);
74 HFSPLUS_I(inode)->flags = 0;
75 HFSPLUS_I(inode)->extent_state = 0;
76 HFSPLUS_I(inode)->rsrc_inode = NULL;
77 atomic_set(&HFSPLUS_I(inode)->opencnt, 0);
78
79 if (inode->i_ino >= HFSPLUS_FIRSTUSER_CNID ||
80 inode->i_ino == HFSPLUS_ROOT_CNID) {
81 err = hfs_find_init(HFSPLUS_SB(inode->i_sb)->cat_tree, &fd);
82 if (!err) {
83 err = hfsplus_find_cat(inode->i_sb, inode->i_ino, &fd);
84 if (!err)
85 err = hfsplus_cat_read_inode(inode, &fd);
86 hfs_find_exit(&fd);
87 }
88 } else {
89 err = hfsplus_system_read_inode(inode);
90 }
91
92 if (err) {
93 iget_failed(inode);
94 return ERR_PTR(err);
95 }
96
97 unlock_new_inode(inode);
98 return inode;
99 }
100
101 static int hfsplus_system_write_inode(struct inode *inode)
102 {
103 struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb);
104 struct hfsplus_vh *vhdr = sbi->s_vhdr;
105 struct hfsplus_fork_raw *fork;
106 struct hfs_btree *tree = NULL;
107
108 switch (inode->i_ino) {
109 case HFSPLUS_EXT_CNID:
110 fork = &vhdr->ext_file;
111 tree = sbi->ext_tree;
112 break;
113 case HFSPLUS_CAT_CNID:
114 fork = &vhdr->cat_file;
115 tree = sbi->cat_tree;
116 break;
117 case HFSPLUS_ALLOC_CNID:
118 fork = &vhdr->alloc_file;
119 break;
120 case HFSPLUS_START_CNID:
121 fork = &vhdr->start_file;
122 break;
123 case HFSPLUS_ATTR_CNID:
124 fork = &vhdr->attr_file;
125 tree = sbi->attr_tree;
126 break;
127 default:
128 return -EIO;
129 }
130
131 if (fork->total_size != cpu_to_be64(inode->i_size)) {
132 set_bit(HFSPLUS_SB_WRITEBACKUP, &sbi->flags);
133 hfsplus_mark_mdb_dirty(inode->i_sb);
134 }
135 hfsplus_inode_write_fork(inode, fork);
136 if (tree) {
137 int err = hfs_btree_write(tree);
138
139 if (err) {
140 pr_err("b-tree write err: %d, ino %lu\n",
141 err, inode->i_ino);
142 return err;
143 }
144 }
145 return 0;
146 }
147
148 static int hfsplus_write_inode(struct inode *inode,
149 struct writeback_control *wbc)
150 {
151 int err;
152
153 hfs_dbg(INODE, "hfsplus_write_inode: %lu\n", inode->i_ino);
154
155 err = hfsplus_ext_write_extent(inode);
156 if (err)
157 return err;
158
159 if (inode->i_ino >= HFSPLUS_FIRSTUSER_CNID ||
160 inode->i_ino == HFSPLUS_ROOT_CNID)
161 return hfsplus_cat_write_inode(inode);
162 else
163 return hfsplus_system_write_inode(inode);
164 }
165
166 static void hfsplus_evict_inode(struct inode *inode)
167 {
168 hfs_dbg(INODE, "hfsplus_evict_inode: %lu\n", inode->i_ino);
169 truncate_inode_pages_final(&inode->i_data);
170 clear_inode(inode);
171 if (HFSPLUS_IS_RSRC(inode)) {
172 HFSPLUS_I(HFSPLUS_I(inode)->rsrc_inode)->rsrc_inode = NULL;
173 iput(HFSPLUS_I(inode)->rsrc_inode);
174 }
175 }
176
177 static int hfsplus_sync_fs(struct super_block *sb, int wait)
178 {
179 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
180 struct hfsplus_vh *vhdr = sbi->s_vhdr;
181 int write_backup = 0;
182 int error, error2;
183
184 if (!wait)
185 return 0;
186
187 hfs_dbg(SUPER, "hfsplus_sync_fs\n");
188
189 /*
190 * Explicitly write out the special metadata inodes.
191 *
192 * While these special inodes are marked as hashed and written
193 * out peridocically by the flusher threads we redirty them
194 * during writeout of normal inodes, and thus the life lock
195 * prevents us from getting the latest state to disk.
196 */
197 error = filemap_write_and_wait(sbi->cat_tree->inode->i_mapping);
198 error2 = filemap_write_and_wait(sbi->ext_tree->inode->i_mapping);
199 if (!error)
200 error = error2;
201 if (sbi->attr_tree) {
202 error2 =
203 filemap_write_and_wait(sbi->attr_tree->inode->i_mapping);
204 if (!error)
205 error = error2;
206 }
207 error2 = filemap_write_and_wait(sbi->alloc_file->i_mapping);
208 if (!error)
209 error = error2;
210
211 mutex_lock(&sbi->vh_mutex);
212 mutex_lock(&sbi->alloc_mutex);
213 vhdr->free_blocks = cpu_to_be32(sbi->free_blocks);
214 vhdr->next_cnid = cpu_to_be32(sbi->next_cnid);
215 vhdr->folder_count = cpu_to_be32(sbi->folder_count);
216 vhdr->file_count = cpu_to_be32(sbi->file_count);
217
218 if (test_and_clear_bit(HFSPLUS_SB_WRITEBACKUP, &sbi->flags)) {
219 memcpy(sbi->s_backup_vhdr, sbi->s_vhdr, sizeof(*sbi->s_vhdr));
220 write_backup = 1;
221 }
222
223 error2 = hfsplus_submit_bio(sb,
224 sbi->part_start + HFSPLUS_VOLHEAD_SECTOR,
225 sbi->s_vhdr_buf, NULL, REQ_OP_WRITE |
226 REQ_SYNC);
227 if (!error)
228 error = error2;
229 if (!write_backup)
230 goto out;
231
232 error2 = hfsplus_submit_bio(sb,
233 sbi->part_start + sbi->sect_count - 2,
234 sbi->s_backup_vhdr_buf, NULL, REQ_OP_WRITE |
235 REQ_SYNC);
236 if (!error)
237 error2 = error;
238 out:
239 mutex_unlock(&sbi->alloc_mutex);
240 mutex_unlock(&sbi->vh_mutex);
241
242 if (!test_bit(HFSPLUS_SB_NOBARRIER, &sbi->flags))
243 blkdev_issue_flush(sb->s_bdev);
244
245 return error;
246 }
247
248 static void delayed_sync_fs(struct work_struct *work)
249 {
250 int err;
251 struct hfsplus_sb_info *sbi;
252
253 sbi = container_of(work, struct hfsplus_sb_info, sync_work.work);
254
255 spin_lock(&sbi->work_lock);
256 sbi->work_queued = 0;
257 spin_unlock(&sbi->work_lock);
258
259 err = hfsplus_sync_fs(sbi->alloc_file->i_sb, 1);
260 if (err)
261 pr_err("delayed sync fs err %d\n", err);
262 }
263
264 void hfsplus_mark_mdb_dirty(struct super_block *sb)
265 {
266 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
267 unsigned long delay;
268
269 if (sb_rdonly(sb))
270 return;
271
272 spin_lock(&sbi->work_lock);
273 if (!sbi->work_queued) {
274 delay = msecs_to_jiffies(dirty_writeback_interval * 10);
275 queue_delayed_work(system_long_wq, &sbi->sync_work, delay);
276 sbi->work_queued = 1;
277 }
278 spin_unlock(&sbi->work_lock);
279 }
280
281 static void delayed_free(struct rcu_head *p)
282 {
283 struct hfsplus_sb_info *sbi = container_of(p, struct hfsplus_sb_info, rcu);
284
285 unload_nls(sbi->nls);
286 kfree(sbi);
287 }
288
289 static void hfsplus_put_super(struct super_block *sb)
290 {
291 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
292
293 hfs_dbg(SUPER, "hfsplus_put_super\n");
294
295 cancel_delayed_work_sync(&sbi->sync_work);
296
297 if (!sb_rdonly(sb) && sbi->s_vhdr) {
298 struct hfsplus_vh *vhdr = sbi->s_vhdr;
299
300 vhdr->modify_date = hfsp_now2mt();
301 vhdr->attributes |= cpu_to_be32(HFSPLUS_VOL_UNMNT);
302 vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_INCNSTNT);
303
304 hfsplus_sync_fs(sb, 1);
305 }
306
307 iput(sbi->alloc_file);
308 iput(sbi->hidden_dir);
309 hfs_btree_close(sbi->attr_tree);
310 hfs_btree_close(sbi->cat_tree);
311 hfs_btree_close(sbi->ext_tree);
312 kfree(sbi->s_vhdr_buf);
313 kfree(sbi->s_backup_vhdr_buf);
314 call_rcu(&sbi->rcu, delayed_free);
315 }
316
317 static int hfsplus_statfs(struct dentry *dentry, struct kstatfs *buf)
318 {
319 struct super_block *sb = dentry->d_sb;
320 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
321 u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
322
323 buf->f_type = HFSPLUS_SUPER_MAGIC;
324 buf->f_bsize = sb->s_blocksize;
325 buf->f_blocks = sbi->total_blocks << sbi->fs_shift;
326 buf->f_bfree = sbi->free_blocks << sbi->fs_shift;
327 buf->f_bavail = buf->f_bfree;
328 buf->f_files = 0xFFFFFFFF;
329 buf->f_ffree = 0xFFFFFFFF - sbi->next_cnid;
330 buf->f_fsid = u64_to_fsid(id);
331 buf->f_namelen = HFSPLUS_MAX_STRLEN;
332
333 return 0;
334 }
335
336 static int hfsplus_reconfigure(struct fs_context *fc)
337 {
338 struct super_block *sb = fc->root->d_sb;
339
340 sync_filesystem(sb);
341 if ((bool)(fc->sb_flags & SB_RDONLY) == sb_rdonly(sb))
342 return 0;
343 if (!(fc->sb_flags & SB_RDONLY)) {
344 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
345 struct hfsplus_vh *vhdr = sbi->s_vhdr;
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 fc->sb_flags |= SB_RDONLY;
351 } else if (test_bit(HFSPLUS_SB_FORCE, &sbi->flags)) {
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 fc->sb_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 fc->sb_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 .show_options = hfsplus_show_options,
377 };
378
379 static int hfsplus_fill_super(struct super_block *sb, struct fs_context *fc)
380 {
381 struct hfsplus_vh *vhdr;
382 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
383 hfsplus_cat_entry entry;
384 struct hfs_find_data fd;
385 struct inode *root, *inode;
386 struct qstr str;
387 struct nls_table *nls;
388 u64 last_fs_block, last_fs_page;
389 int silent = fc->sb_flags & SB_SILENT;
390 int err;
391
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
397 err = -EINVAL;
398 if (!sbi->nls) {
399 /* try utf8 first, as this is the old default behaviour */
400 sbi->nls = load_nls("utf8");
401 if (!sbi->nls)
402 sbi->nls = load_nls_default();
403 }
404
405 /* temporarily use utf8 to correctly find the hidden dir below */
406 nls = sbi->nls;
407 sbi->nls = load_nls("utf8");
408 if (!sbi->nls) {
409 pr_err("unable to load nls for utf8\n");
410 goto out_unload_nls;
411 }
412
413 /* Grab the volume header */
414 if (hfsplus_read_wrapper(sb)) {
415 if (!silent)
416 pr_warn("unable to find HFS+ superblock\n");
417 goto out_unload_nls;
418 }
419 vhdr = sbi->s_vhdr;
420
421 /* Copy parts of the volume header into the superblock */
422 sb->s_magic = HFSPLUS_VOLHEAD_SIG;
423 if (be16_to_cpu(vhdr->version) < HFSPLUS_MIN_VERSION ||
424 be16_to_cpu(vhdr->version) > HFSPLUS_CURRENT_VERSION) {
425 pr_err("wrong filesystem version\n");
426 goto out_free_vhdr;
427 }
428 sbi->total_blocks = be32_to_cpu(vhdr->total_blocks);
429 sbi->free_blocks = be32_to_cpu(vhdr->free_blocks);
430 sbi->next_cnid = be32_to_cpu(vhdr->next_cnid);
431 sbi->file_count = be32_to_cpu(vhdr->file_count);
432 sbi->folder_count = be32_to_cpu(vhdr->folder_count);
433 sbi->data_clump_blocks =
434 be32_to_cpu(vhdr->data_clump_sz) >> sbi->alloc_blksz_shift;
435 if (!sbi->data_clump_blocks)
436 sbi->data_clump_blocks = 1;
437 sbi->rsrc_clump_blocks =
438 be32_to_cpu(vhdr->rsrc_clump_sz) >> sbi->alloc_blksz_shift;
439 if (!sbi->rsrc_clump_blocks)
440 sbi->rsrc_clump_blocks = 1;
441
442 err = -EFBIG;
443 last_fs_block = sbi->total_blocks - 1;
444 last_fs_page = (last_fs_block << sbi->alloc_blksz_shift) >>
445 PAGE_SHIFT;
446
447 if ((last_fs_block > (sector_t)(~0ULL) >> (sbi->alloc_blksz_shift - 9)) ||
448 (last_fs_page > (pgoff_t)(~0ULL))) {
449 pr_err("filesystem size too large\n");
450 goto out_free_vhdr;
451 }
452
453 /* Set up operations so we can load metadata */
454 sb->s_op = &hfsplus_sops;
455 sb->s_maxbytes = MAX_LFS_FILESIZE;
456
457 if (!(vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_UNMNT))) {
458 pr_warn("Filesystem was not cleanly unmounted, running fsck.hfsplus is recommended. mounting read-only.\n");
459 sb->s_flags |= SB_RDONLY;
460 } else if (test_and_clear_bit(HFSPLUS_SB_FORCE, &sbi->flags)) {
461 /* nothing */
462 } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) {
463 pr_warn("Filesystem is marked locked, mounting read-only.\n");
464 sb->s_flags |= SB_RDONLY;
465 } else if ((vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_JOURNALED)) &&
466 !sb_rdonly(sb)) {
467 pr_warn("write access to a journaled filesystem is not supported, use the force option at your own risk, mounting read-only.\n");
468 sb->s_flags |= SB_RDONLY;
469 }
470
471 err = -EINVAL;
472
473 /* Load metadata objects (B*Trees) */
474 sbi->ext_tree = hfs_btree_open(sb, HFSPLUS_EXT_CNID);
475 if (!sbi->ext_tree) {
476 pr_err("failed to load extents file\n");
477 goto out_free_vhdr;
478 }
479 sbi->cat_tree = hfs_btree_open(sb, HFSPLUS_CAT_CNID);
480 if (!sbi->cat_tree) {
481 pr_err("failed to load catalog file\n");
482 goto out_close_ext_tree;
483 }
484 atomic_set(&sbi->attr_tree_state, HFSPLUS_EMPTY_ATTR_TREE);
485 if (vhdr->attr_file.total_blocks != 0) {
486 sbi->attr_tree = hfs_btree_open(sb, HFSPLUS_ATTR_CNID);
487 if (!sbi->attr_tree) {
488 pr_err("failed to load attributes file\n");
489 goto out_close_cat_tree;
490 }
491 atomic_set(&sbi->attr_tree_state, HFSPLUS_VALID_ATTR_TREE);
492 }
493 sb->s_xattr = hfsplus_xattr_handlers;
494
495 inode = hfsplus_iget(sb, HFSPLUS_ALLOC_CNID);
496 if (IS_ERR(inode)) {
497 pr_err("failed to load allocation file\n");
498 err = PTR_ERR(inode);
499 goto out_close_attr_tree;
500 }
501 sbi->alloc_file = inode;
502
503 /* Load the root directory */
504 root = hfsplus_iget(sb, HFSPLUS_ROOT_CNID);
505 if (IS_ERR(root)) {
506 pr_err("failed to load root directory\n");
507 err = PTR_ERR(root);
508 goto out_put_alloc_file;
509 }
510
511 sb->s_d_op = &hfsplus_dentry_operations;
512 sb->s_root = d_make_root(root);
513 if (!sb->s_root) {
514 err = -ENOMEM;
515 goto out_put_alloc_file;
516 }
517
518 str.len = sizeof(HFSP_HIDDENDIR_NAME) - 1;
519 str.name = HFSP_HIDDENDIR_NAME;
520 err = hfs_find_init(sbi->cat_tree, &fd);
521 if (err)
522 goto out_put_root;
523 err = hfsplus_cat_build_key(sb, fd.search_key, HFSPLUS_ROOT_CNID, &str);
524 if (unlikely(err < 0))
525 goto out_put_root;
526 if (!hfs_brec_read(&fd, &entry, sizeof(entry))) {
527 hfs_find_exit(&fd);
528 if (entry.type != cpu_to_be16(HFSPLUS_FOLDER)) {
529 err = -EINVAL;
530 goto out_put_root;
531 }
532 inode = hfsplus_iget(sb, be32_to_cpu(entry.folder.id));
533 if (IS_ERR(inode)) {
534 err = PTR_ERR(inode);
535 goto out_put_root;
536 }
537 sbi->hidden_dir = inode;
538 } else
539 hfs_find_exit(&fd);
540
541 if (!sb_rdonly(sb)) {
542 /*
543 * H+LX == hfsplusutils, H+Lx == this driver, H+lx is unused
544 * all three are registered with Apple for our use
545 */
546 vhdr->last_mount_vers = cpu_to_be32(HFSP_MOUNT_VERSION);
547 vhdr->modify_date = hfsp_now2mt();
548 be32_add_cpu(&vhdr->write_count, 1);
549 vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_UNMNT);
550 vhdr->attributes |= cpu_to_be32(HFSPLUS_VOL_INCNSTNT);
551 hfsplus_sync_fs(sb, 1);
552
553 if (!sbi->hidden_dir) {
554 mutex_lock(&sbi->vh_mutex);
555 sbi->hidden_dir = hfsplus_new_inode(sb, root, S_IFDIR);
556 if (!sbi->hidden_dir) {
557 mutex_unlock(&sbi->vh_mutex);
558 err = -ENOMEM;
559 goto out_put_root;
560 }
561 err = hfsplus_create_cat(sbi->hidden_dir->i_ino, root,
562 &str, sbi->hidden_dir);
563 if (err) {
564 mutex_unlock(&sbi->vh_mutex);
565 goto out_put_hidden_dir;
566 }
567
568 err = hfsplus_init_security(sbi->hidden_dir,
569 root, &str);
570 if (err == -EOPNOTSUPP)
571 err = 0; /* Operation is not supported. */
572 else if (err) {
573 /*
574 * Try to delete anyway without
575 * error analysis.
576 */
577 hfsplus_delete_cat(sbi->hidden_dir->i_ino,
578 root, &str);
579 mutex_unlock(&sbi->vh_mutex);
580 goto out_put_hidden_dir;
581 }
582
583 mutex_unlock(&sbi->vh_mutex);
584 hfsplus_mark_inode_dirty(sbi->hidden_dir,
585 HFSPLUS_I_CAT_DIRTY);
586 }
587 }
588
589 unload_nls(sbi->nls);
590 sbi->nls = nls;
591 return 0;
592
593 out_put_hidden_dir:
594 cancel_delayed_work_sync(&sbi->sync_work);
595 iput(sbi->hidden_dir);
596 out_put_root:
597 dput(sb->s_root);
598 sb->s_root = NULL;
599 out_put_alloc_file:
600 iput(sbi->alloc_file);
601 out_close_attr_tree:
602 hfs_btree_close(sbi->attr_tree);
603 out_close_cat_tree:
604 hfs_btree_close(sbi->cat_tree);
605 out_close_ext_tree:
606 hfs_btree_close(sbi->ext_tree);
607 out_free_vhdr:
608 kfree(sbi->s_vhdr_buf);
609 kfree(sbi->s_backup_vhdr_buf);
610 out_unload_nls:
611 unload_nls(sbi->nls);
612 unload_nls(nls);
613 kfree(sbi);
614 return err;
615 }
616
617 MODULE_AUTHOR("Brad Boyer");
618 MODULE_DESCRIPTION("Extended Macintosh Filesystem");
619 MODULE_LICENSE("GPL");
620
621 static struct kmem_cache *hfsplus_inode_cachep;
622
623 static struct inode *hfsplus_alloc_inode(struct super_block *sb)
624 {
625 struct hfsplus_inode_info *i;
626
627 i = alloc_inode_sb(sb, hfsplus_inode_cachep, GFP_KERNEL);
628 return i ? &i->vfs_inode : NULL;
629 }
630
631 static void hfsplus_free_inode(struct inode *inode)
632 {
633 kmem_cache_free(hfsplus_inode_cachep, HFSPLUS_I(inode));
634 }
635
636 #define HFSPLUS_INODE_SIZE sizeof(struct hfsplus_inode_info)
637
638 static int hfsplus_get_tree(struct fs_context *fc)
639 {
640 return get_tree_bdev(fc, hfsplus_fill_super);
641 }
642
643 static void hfsplus_free_fc(struct fs_context *fc)
644 {
645 kfree(fc->s_fs_info);
646 }
647
648 static const struct fs_context_operations hfsplus_context_ops = {
649 .parse_param = hfsplus_parse_param,
650 .get_tree = hfsplus_get_tree,
651 .reconfigure = hfsplus_reconfigure,
652 .free = hfsplus_free_fc,
653 };
654
655 static int hfsplus_init_fs_context(struct fs_context *fc)
656 {
657 struct hfsplus_sb_info *sbi;
658
659 sbi = kzalloc(sizeof(struct hfsplus_sb_info), GFP_KERNEL);
660 if (!sbi)
661 return -ENOMEM;
662
663 if (fc->purpose != FS_CONTEXT_FOR_RECONFIGURE)
664 hfsplus_fill_defaults(sbi);
665
666 fc->s_fs_info = sbi;
667 fc->ops = &hfsplus_context_ops;
668
669 return 0;
670 }
671
672 static struct file_system_type hfsplus_fs_type = {
673 .owner = THIS_MODULE,
674 .name = "hfsplus",
675 .kill_sb = kill_block_super,
676 .fs_flags = FS_REQUIRES_DEV,
677 .init_fs_context = hfsplus_init_fs_context,
678 };
679 MODULE_ALIAS_FS("hfsplus");
680
681 static void hfsplus_init_once(void *p)
682 {
683 struct hfsplus_inode_info *i = p;
684
685 inode_init_once(&i->vfs_inode);
686 }
687
688 static int __init init_hfsplus_fs(void)
689 {
690 int err;
691
692 hfsplus_inode_cachep = kmem_cache_create("hfsplus_icache",
693 HFSPLUS_INODE_SIZE, 0, SLAB_HWCACHE_ALIGN|SLAB_ACCOUNT,
694 hfsplus_init_once);
695 if (!hfsplus_inode_cachep)
696 return -ENOMEM;
697 err = hfsplus_create_attr_tree_cache();
698 if (err)
699 goto destroy_inode_cache;
700 err = register_filesystem(&hfsplus_fs_type);
701 if (err)
702 goto destroy_attr_tree_cache;
703 return 0;
704
705 destroy_attr_tree_cache:
706 hfsplus_destroy_attr_tree_cache();
707
708 destroy_inode_cache:
709 kmem_cache_destroy(hfsplus_inode_cachep);
710
711 return err;
712 }
713
714 static void __exit exit_hfsplus_fs(void)
715 {
716 unregister_filesystem(&hfsplus_fs_type);
717
718 /*
719 * Make sure all delayed rcu free inodes are flushed before we
720 * destroy cache.
721 */
722 rcu_barrier();
723 hfsplus_destroy_attr_tree_cache();
724 kmem_cache_destroy(hfsplus_inode_cachep);
725 }
726
727 module_init(init_hfsplus_fs)
728 module_exit(exit_hfsplus_fs)
Kernel DRM miscellaneous fixes and cross-tree changes