Commit | Line | Data |
---|---|---|
09c434b8 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
1da177e4 LT |
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 | ||
1da177e4 LT |
11 | #include <linux/module.h> |
12 | #include <linux/init.h> | |
13 | #include <linux/pagemap.h> | |
34a2d313 | 14 | #include <linux/blkdev.h> |
66114cad | 15 | #include <linux/backing-dev.h> |
1da177e4 | 16 | #include <linux/fs.h> |
1da177e4 | 17 | #include <linux/slab.h> |
1da177e4 LT |
18 | #include <linux/vfs.h> |
19 | #include <linux/nls.h> | |
20 | ||
21 | static struct inode *hfsplus_alloc_inode(struct super_block *sb); | |
08ab2293 | 22 | static void hfsplus_free_inode(struct inode *inode); |
1da177e4 LT |
23 | |
24 | #include "hfsplus_fs.h" | |
324ef39a | 25 | #include "xattr.h" |
1da177e4 | 26 | |
fc4fff82 CH |
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 | ||
63525391 | 58 | struct inode *hfsplus_iget(struct super_block *sb, unsigned long ino) |
1da177e4 LT |
59 | { |
60 | struct hfs_find_data fd; | |
63525391 | 61 | struct inode *inode; |
fc4fff82 | 62 | int err; |
63525391 DH |
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; | |
1da177e4 | 69 | |
6af502de | 70 | INIT_LIST_HEAD(&HFSPLUS_I(inode)->open_dir_list); |
323ee8fc | 71 | spin_lock_init(&HFSPLUS_I(inode)->open_dir_lock); |
6af502de CH |
72 | mutex_init(&HFSPLUS_I(inode)->extents_lock); |
73 | HFSPLUS_I(inode)->flags = 0; | |
b33b7921 | 74 | HFSPLUS_I(inode)->extent_state = 0; |
6af502de CH |
75 | HFSPLUS_I(inode)->rsrc_inode = NULL; |
76 | atomic_set(&HFSPLUS_I(inode)->opencnt, 0); | |
1da177e4 | 77 | |
fc4fff82 CH |
78 | if (inode->i_ino >= HFSPLUS_FIRSTUSER_CNID || |
79 | inode->i_ino == HFSPLUS_ROOT_CNID) { | |
5bd9d99d AK |
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 | } | |
fc4fff82 CH |
87 | } else { |
88 | err = hfsplus_system_read_inode(inode); | |
1da177e4 | 89 | } |
fc4fff82 CH |
90 | |
91 | if (err) { | |
92 | iget_failed(inode); | |
93 | return ERR_PTR(err); | |
1da177e4 LT |
94 | } |
95 | ||
63525391 DH |
96 | unlock_new_inode(inode); |
97 | return inode; | |
1da177e4 LT |
98 | } |
99 | ||
b5080f77 | 100 | static int hfsplus_system_write_inode(struct inode *inode) |
1da177e4 | 101 | { |
dd73a01a | 102 | struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb); |
b5080f77 CH |
103 | struct hfsplus_vh *vhdr = sbi->s_vhdr; |
104 | struct hfsplus_fork_raw *fork; | |
105 | struct hfs_btree *tree = NULL; | |
1da177e4 | 106 | |
1da177e4 | 107 | switch (inode->i_ino) { |
1da177e4 | 108 | case HFSPLUS_EXT_CNID: |
b5080f77 CH |
109 | fork = &vhdr->ext_file; |
110 | tree = sbi->ext_tree; | |
1da177e4 LT |
111 | break; |
112 | case HFSPLUS_CAT_CNID: | |
b5080f77 CH |
113 | fork = &vhdr->cat_file; |
114 | tree = sbi->cat_tree; | |
1da177e4 LT |
115 | break; |
116 | case HFSPLUS_ALLOC_CNID: | |
b5080f77 | 117 | fork = &vhdr->alloc_file; |
1da177e4 LT |
118 | break; |
119 | case HFSPLUS_START_CNID: | |
b5080f77 | 120 | fork = &vhdr->start_file; |
1da177e4 LT |
121 | break; |
122 | case HFSPLUS_ATTR_CNID: | |
b5080f77 CH |
123 | fork = &vhdr->attr_file; |
124 | tree = sbi->attr_tree; | |
324ef39a | 125 | break; |
b5080f77 CH |
126 | default: |
127 | return -EIO; | |
128 | } | |
129 | ||
130 | if (fork->total_size != cpu_to_be64(inode->i_size)) { | |
84adede3 | 131 | set_bit(HFSPLUS_SB_WRITEBACKUP, &sbi->flags); |
9e6c5829 | 132 | hfsplus_mark_mdb_dirty(inode->i_sb); |
1da177e4 | 133 | } |
b5080f77 | 134 | hfsplus_inode_write_fork(inode, fork); |
81cc7fad VD |
135 | if (tree) { |
136 | int err = hfs_btree_write(tree); | |
b73f3d0e | 137 | |
81cc7fad | 138 | if (err) { |
d6142673 | 139 | pr_err("b-tree write err: %d, ino %lu\n", |
b73f3d0e | 140 | err, inode->i_ino); |
81cc7fad VD |
141 | return err; |
142 | } | |
143 | } | |
b5080f77 CH |
144 | return 0; |
145 | } | |
146 | ||
147 | static int hfsplus_write_inode(struct inode *inode, | |
148 | struct writeback_control *wbc) | |
149 | { | |
dd7f3d54 AK |
150 | int err; |
151 | ||
c2b3e1f7 | 152 | hfs_dbg(INODE, "hfsplus_write_inode: %lu\n", inode->i_ino); |
b5080f77 | 153 | |
dd7f3d54 AK |
154 | err = hfsplus_ext_write_extent(inode); |
155 | if (err) | |
156 | return err; | |
b5080f77 CH |
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); | |
1da177e4 LT |
163 | } |
164 | ||
b57922d9 | 165 | static void hfsplus_evict_inode(struct inode *inode) |
1da177e4 | 166 | { |
c2b3e1f7 | 167 | hfs_dbg(INODE, "hfsplus_evict_inode: %lu\n", inode->i_ino); |
91b0abe3 | 168 | truncate_inode_pages_final(&inode->i_data); |
dbd5768f | 169 | clear_inode(inode); |
1da177e4 | 170 | if (HFSPLUS_IS_RSRC(inode)) { |
6af502de CH |
171 | HFSPLUS_I(HFSPLUS_I(inode)->rsrc_inode)->rsrc_inode = NULL; |
172 | iput(HFSPLUS_I(inode)->rsrc_inode); | |
1da177e4 | 173 | } |
1da177e4 LT |
174 | } |
175 | ||
0a818619 | 176 | static int hfsplus_sync_fs(struct super_block *sb, int wait) |
1da177e4 | 177 | { |
dd73a01a CH |
178 | struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb); |
179 | struct hfsplus_vh *vhdr = sbi->s_vhdr; | |
52399b17 CH |
180 | int write_backup = 0; |
181 | int error, error2; | |
1da177e4 | 182 | |
f02e26f8 CH |
183 | if (!wait) |
184 | return 0; | |
1da177e4 | 185 | |
c2b3e1f7 | 186 | hfs_dbg(SUPER, "hfsplus_sync_fs\n"); |
ebc1ac16 | 187 | |
7dc4f001 CH |
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; | |
324ef39a VD |
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 | } | |
7dc4f001 CH |
206 | error2 = filemap_write_and_wait(sbi->alloc_file->i_mapping); |
207 | if (!error) | |
208 | error = error2; | |
209 | ||
52399b17 CH |
210 | mutex_lock(&sbi->vh_mutex); |
211 | mutex_lock(&sbi->alloc_mutex); | |
dd73a01a | 212 | vhdr->free_blocks = cpu_to_be32(sbi->free_blocks); |
dd73a01a CH |
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); | |
1da177e4 | 216 | |
84adede3 | 217 | if (test_and_clear_bit(HFSPLUS_SB_WRITEBACKUP, &sbi->flags)) { |
52399b17 CH |
218 | memcpy(sbi->s_backup_vhdr, sbi->s_vhdr, sizeof(*sbi->s_vhdr)); |
219 | write_backup = 1; | |
1da177e4 | 220 | } |
52399b17 | 221 | |
6596528e | 222 | error2 = hfsplus_submit_bio(sb, |
52399b17 | 223 | sbi->part_start + HFSPLUS_VOLHEAD_SECTOR, |
c85f9992 | 224 | sbi->s_vhdr_buf, NULL, REQ_OP_WRITE | |
70fd7614 | 225 | REQ_SYNC); |
7dc4f001 CH |
226 | if (!error) |
227 | error = error2; | |
52399b17 CH |
228 | if (!write_backup) |
229 | goto out; | |
230 | ||
6596528e | 231 | error2 = hfsplus_submit_bio(sb, |
52399b17 | 232 | sbi->part_start + sbi->sect_count - 2, |
c85f9992 | 233 | sbi->s_backup_vhdr_buf, NULL, REQ_OP_WRITE | |
70fd7614 | 234 | REQ_SYNC); |
52399b17 CH |
235 | if (!error) |
236 | error2 = error; | |
237 | out: | |
dd73a01a | 238 | mutex_unlock(&sbi->alloc_mutex); |
7ac9fb9c | 239 | mutex_unlock(&sbi->vh_mutex); |
34a2d313 CH |
240 | |
241 | if (!test_bit(HFSPLUS_SB_NOBARRIER, &sbi->flags)) | |
c6bf3f0e | 242 | blkdev_issue_flush(sb->s_bdev); |
34a2d313 | 243 | |
52399b17 | 244 | return error; |
7fbc6df0 CH |
245 | } |
246 | ||
9e6c5829 | 247 | static void delayed_sync_fs(struct work_struct *work) |
7fbc6df0 | 248 | { |
bffdd661 | 249 | int err; |
9e6c5829 AB |
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 | ||
bffdd661 VD |
258 | err = hfsplus_sync_fs(sbi->alloc_file->i_sb, 1); |
259 | if (err) | |
d6142673 | 260 | pr_err("delayed sync fs err %d\n", err); |
9e6c5829 AB |
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 | ||
bc98a42c | 268 | if (sb_rdonly(sb)) |
9e6c5829 AB |
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); | |
1da177e4 LT |
278 | } |
279 | ||
af072cf6 AV |
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 | ||
1da177e4 LT |
288 | static void hfsplus_put_super(struct super_block *sb) |
289 | { | |
dd73a01a CH |
290 | struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb); |
291 | ||
c2b3e1f7 | 292 | hfs_dbg(SUPER, "hfsplus_put_super\n"); |
dd73a01a | 293 | |
9e6c5829 AB |
294 | cancel_delayed_work_sync(&sbi->sync_work); |
295 | ||
bc98a42c | 296 | if (!sb_rdonly(sb) && sbi->s_vhdr) { |
dd73a01a | 297 | struct hfsplus_vh *vhdr = sbi->s_vhdr; |
1da177e4 LT |
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); | |
3b5ce8ae CH |
302 | |
303 | hfsplus_sync_fs(sb, 1); | |
1da177e4 LT |
304 | } |
305 | ||
07db5e24 DM |
306 | iput(sbi->alloc_file); |
307 | iput(sbi->hidden_dir); | |
324ef39a | 308 | hfs_btree_close(sbi->attr_tree); |
dd73a01a CH |
309 | hfs_btree_close(sbi->cat_tree); |
310 | hfs_btree_close(sbi->ext_tree); | |
6596528e SF |
311 | kfree(sbi->s_vhdr_buf); |
312 | kfree(sbi->s_backup_vhdr_buf); | |
af072cf6 | 313 | call_rcu(&sbi->rcu, delayed_free); |
1da177e4 LT |
314 | } |
315 | ||
726c3342 | 316 | static int hfsplus_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 317 | { |
726c3342 | 318 | struct super_block *sb = dentry->d_sb; |
dd73a01a | 319 | struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb); |
25564dd8 | 320 | u64 id = huge_encode_dev(sb->s_bdev->bd_dev); |
726c3342 | 321 | |
1da177e4 LT |
322 | buf->f_type = HFSPLUS_SUPER_MAGIC; |
323 | buf->f_bsize = sb->s_blocksize; | |
dd73a01a CH |
324 | buf->f_blocks = sbi->total_blocks << sbi->fs_shift; |
325 | buf->f_bfree = sbi->free_blocks << sbi->fs_shift; | |
1da177e4 LT |
326 | buf->f_bavail = buf->f_bfree; |
327 | buf->f_files = 0xFFFFFFFF; | |
dd73a01a | 328 | buf->f_ffree = 0xFFFFFFFF - sbi->next_cnid; |
6d1349c7 | 329 | buf->f_fsid = u64_to_fsid(id); |
1da177e4 LT |
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 | { | |
02b9984d | 337 | sync_filesystem(sb); |
1751e8a6 | 338 | if ((bool)(*flags & SB_RDONLY) == sb_rdonly(sb)) |
1da177e4 | 339 | return 0; |
1751e8a6 | 340 | if (!(*flags & SB_RDONLY)) { |
dd73a01a | 341 | struct hfsplus_vh *vhdr = HFSPLUS_SB(sb)->s_vhdr; |
6f80dfe5 | 342 | int force = 0; |
b0b623c3 | 343 | |
6f80dfe5 | 344 | if (!hfsplus_parse_options_remount(data, &force)) |
b0b623c3 | 345 | return -EINVAL; |
1da177e4 LT |
346 | |
347 | if (!(vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_UNMNT))) { | |
d6142673 | 348 | pr_warn("filesystem was not cleanly unmounted, running fsck.hfsplus is recommended. leaving read-only.\n"); |
1751e8a6 LT |
349 | sb->s_flags |= SB_RDONLY; |
350 | *flags |= SB_RDONLY; | |
6f80dfe5 | 351 | } else if (force) { |
b0b623c3 | 352 | /* nothing */ |
2753cc28 AS |
353 | } else if (vhdr->attributes & |
354 | cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) { | |
d6142673 | 355 | pr_warn("filesystem is marked locked, leaving read-only.\n"); |
1751e8a6 LT |
356 | sb->s_flags |= SB_RDONLY; |
357 | *flags |= SB_RDONLY; | |
2753cc28 AS |
358 | } else if (vhdr->attributes & |
359 | cpu_to_be32(HFSPLUS_VOL_JOURNALED)) { | |
d6142673 | 360 | pr_warn("filesystem is marked journaled, leaving read-only.\n"); |
1751e8a6 LT |
361 | sb->s_flags |= SB_RDONLY; |
362 | *flags |= SB_RDONLY; | |
1da177e4 LT |
363 | } |
364 | } | |
365 | return 0; | |
366 | } | |
367 | ||
ee9b6d61 | 368 | static const struct super_operations hfsplus_sops = { |
1da177e4 | 369 | .alloc_inode = hfsplus_alloc_inode, |
08ab2293 | 370 | .free_inode = hfsplus_free_inode, |
1da177e4 | 371 | .write_inode = hfsplus_write_inode, |
b57922d9 | 372 | .evict_inode = hfsplus_evict_inode, |
1da177e4 | 373 | .put_super = hfsplus_put_super, |
7fbc6df0 | 374 | .sync_fs = hfsplus_sync_fs, |
1da177e4 LT |
375 | .statfs = hfsplus_statfs, |
376 | .remount_fs = hfsplus_remount, | |
717dd80e | 377 | .show_options = hfsplus_show_options, |
1da177e4 LT |
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; | |
63525391 | 386 | struct inode *root, *inode; |
1da177e4 LT |
387 | struct qstr str; |
388 | struct nls_table *nls = NULL; | |
f1fcd9f0 | 389 | u64 last_fs_block, last_fs_page; |
c5b8d0bc | 390 | int err; |
1da177e4 | 391 | |
497d48bd | 392 | err = -ENOMEM; |
a5001a27 | 393 | sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); |
1da177e4 | 394 | if (!sbi) |
c5b8d0bc | 395 | goto out; |
1da177e4 | 396 | |
1da177e4 | 397 | sb->s_fs_info = sbi; |
40bf48af | 398 | mutex_init(&sbi->alloc_mutex); |
7ac9fb9c | 399 | mutex_init(&sbi->vh_mutex); |
9e6c5829 AB |
400 | spin_lock_init(&sbi->work_lock); |
401 | INIT_DELAYED_WORK(&sbi->sync_work, delayed_sync_fs); | |
717dd80e | 402 | hfsplus_fill_defaults(sbi); |
c5b8d0bc CH |
403 | |
404 | err = -EINVAL; | |
717dd80e | 405 | if (!hfsplus_parse_options(data, sbi)) { |
d6142673 | 406 | pr_err("unable to parse mount options\n"); |
c5b8d0bc | 407 | goto out_unload_nls; |
1da177e4 LT |
408 | } |
409 | ||
410 | /* temporarily use utf8 to correctly find the hidden dir below */ | |
411 | nls = sbi->nls; | |
412 | sbi->nls = load_nls("utf8"); | |
bd6a59b2 | 413 | if (!sbi->nls) { |
d6142673 | 414 | pr_err("unable to load nls for utf8\n"); |
c5b8d0bc | 415 | goto out_unload_nls; |
1da177e4 LT |
416 | } |
417 | ||
418 | /* Grab the volume header */ | |
419 | if (hfsplus_read_wrapper(sb)) { | |
420 | if (!silent) | |
d6142673 | 421 | pr_warn("unable to find HFS+ superblock\n"); |
c5b8d0bc | 422 | goto out_unload_nls; |
1da177e4 | 423 | } |
dd73a01a | 424 | vhdr = sbi->s_vhdr; |
1da177e4 LT |
425 | |
426 | /* Copy parts of the volume header into the superblock */ | |
2179d372 DE |
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) { | |
d6142673 | 430 | pr_err("wrong filesystem version\n"); |
c5b8d0bc | 431 | goto out_free_vhdr; |
1da177e4 | 432 | } |
dd73a01a CH |
433 | sbi->total_blocks = be32_to_cpu(vhdr->total_blocks); |
434 | sbi->free_blocks = be32_to_cpu(vhdr->free_blocks); | |
dd73a01a CH |
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; | |
1da177e4 | 446 | |
f1fcd9f0 CH |
447 | err = -EFBIG; |
448 | last_fs_block = sbi->total_blocks - 1; | |
449 | last_fs_page = (last_fs_block << sbi->alloc_blksz_shift) >> | |
09cbfeaf | 450 | PAGE_SHIFT; |
f1fcd9f0 CH |
451 | |
452 | if ((last_fs_block > (sector_t)(~0ULL) >> (sbi->alloc_blksz_shift - 9)) || | |
453 | (last_fs_page > (pgoff_t)(~0ULL))) { | |
d6142673 | 454 | pr_err("filesystem size too large\n"); |
c6d5f5fa CH |
455 | goto out_free_vhdr; |
456 | } | |
457 | ||
1da177e4 LT |
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))) { | |
d6142673 | 463 | pr_warn("Filesystem was not cleanly unmounted, running fsck.hfsplus is recommended. mounting read-only.\n"); |
1751e8a6 | 464 | sb->s_flags |= SB_RDONLY; |
84adede3 | 465 | } else if (test_and_clear_bit(HFSPLUS_SB_FORCE, &sbi->flags)) { |
b0b623c3 | 466 | /* nothing */ |
1da177e4 | 467 | } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) { |
d6142673 | 468 | pr_warn("Filesystem is marked locked, mounting read-only.\n"); |
1751e8a6 | 469 | sb->s_flags |= SB_RDONLY; |
2753cc28 | 470 | } else if ((vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_JOURNALED)) && |
bc98a42c | 471 | !sb_rdonly(sb)) { |
d6142673 | 472 | pr_warn("write access to a journaled filesystem is not supported, use the force option at your own risk, mounting read-only.\n"); |
1751e8a6 | 473 | sb->s_flags |= SB_RDONLY; |
1da177e4 LT |
474 | } |
475 | ||
c6d5f5fa CH |
476 | err = -EINVAL; |
477 | ||
1da177e4 | 478 | /* Load metadata objects (B*Trees) */ |
dd73a01a CH |
479 | sbi->ext_tree = hfs_btree_open(sb, HFSPLUS_EXT_CNID); |
480 | if (!sbi->ext_tree) { | |
d6142673 | 481 | pr_err("failed to load extents file\n"); |
c5b8d0bc | 482 | goto out_free_vhdr; |
1da177e4 | 483 | } |
dd73a01a CH |
484 | sbi->cat_tree = hfs_btree_open(sb, HFSPLUS_CAT_CNID); |
485 | if (!sbi->cat_tree) { | |
d6142673 | 486 | pr_err("failed to load catalog file\n"); |
c5b8d0bc | 487 | goto out_close_ext_tree; |
1da177e4 | 488 | } |
95e0d7db | 489 | atomic_set(&sbi->attr_tree_state, HFSPLUS_EMPTY_ATTR_TREE); |
324ef39a VD |
490 | if (vhdr->attr_file.total_blocks != 0) { |
491 | sbi->attr_tree = hfs_btree_open(sb, HFSPLUS_ATTR_CNID); | |
492 | if (!sbi->attr_tree) { | |
d6142673 | 493 | pr_err("failed to load attributes file\n"); |
324ef39a VD |
494 | goto out_close_cat_tree; |
495 | } | |
95e0d7db | 496 | atomic_set(&sbi->attr_tree_state, HFSPLUS_VALID_ATTR_TREE); |
324ef39a VD |
497 | } |
498 | sb->s_xattr = hfsplus_xattr_handlers; | |
1da177e4 | 499 | |
63525391 DH |
500 | inode = hfsplus_iget(sb, HFSPLUS_ALLOC_CNID); |
501 | if (IS_ERR(inode)) { | |
d6142673 | 502 | pr_err("failed to load allocation file\n"); |
63525391 | 503 | err = PTR_ERR(inode); |
324ef39a | 504 | goto out_close_attr_tree; |
1da177e4 | 505 | } |
dd73a01a | 506 | sbi->alloc_file = inode; |
1da177e4 LT |
507 | |
508 | /* Load the root directory */ | |
63525391 DH |
509 | root = hfsplus_iget(sb, HFSPLUS_ROOT_CNID); |
510 | if (IS_ERR(root)) { | |
d6142673 | 511 | pr_err("failed to load root directory\n"); |
63525391 | 512 | err = PTR_ERR(root); |
c5b8d0bc | 513 | goto out_put_alloc_file; |
1da177e4 LT |
514 | } |
515 | ||
68acb8e6 AV |
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 | ||
1da177e4 LT |
523 | str.len = sizeof(HFSP_HIDDENDIR_NAME) - 1; |
524 | str.name = HFSP_HIDDENDIR_NAME; | |
5bd9d99d AK |
525 | err = hfs_find_init(sbi->cat_tree, &fd); |
526 | if (err) | |
527 | goto out_put_root; | |
89ac9b4d SS |
528 | err = hfsplus_cat_build_key(sb, fd.search_key, HFSPLUS_ROOT_CNID, &str); |
529 | if (unlikely(err < 0)) | |
530 | goto out_put_root; | |
1da177e4 LT |
531 | if (!hfs_brec_read(&fd, &entry, sizeof(entry))) { |
532 | hfs_find_exit(&fd); | |
7464726c TH |
533 | if (entry.type != cpu_to_be16(HFSPLUS_FOLDER)) { |
534 | err = -EINVAL; | |
c5b8d0bc | 535 | goto out_put_root; |
7464726c | 536 | } |
63525391 DH |
537 | inode = hfsplus_iget(sb, be32_to_cpu(entry.folder.id)); |
538 | if (IS_ERR(inode)) { | |
539 | err = PTR_ERR(inode); | |
c5b8d0bc | 540 | goto out_put_root; |
63525391 | 541 | } |
dd73a01a | 542 | sbi->hidden_dir = inode; |
1da177e4 LT |
543 | } else |
544 | hfs_find_exit(&fd); | |
545 | ||
bc98a42c | 546 | if (!sb_rdonly(sb)) { |
c5b8d0bc CH |
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); | |
1da177e4 | 557 | |
c5b8d0bc CH |
558 | if (!sbi->hidden_dir) { |
559 | mutex_lock(&sbi->vh_mutex); | |
b0cd38c7 | 560 | sbi->hidden_dir = hfsplus_new_inode(sb, root, S_IFDIR); |
b3f2a924 AV |
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); | |
324ef39a VD |
568 | if (err) { |
569 | mutex_unlock(&sbi->vh_mutex); | |
570 | goto out_put_hidden_dir; | |
571 | } | |
572 | ||
f168d9fd EF |
573 | err = hfsplus_init_security(sbi->hidden_dir, |
574 | root, &str); | |
324ef39a VD |
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); | |
b3f2a924 | 585 | goto out_put_hidden_dir; |
324ef39a | 586 | } |
c5b8d0bc | 587 | |
324ef39a | 588 | mutex_unlock(&sbi->vh_mutex); |
c5b8d0bc CH |
589 | hfsplus_mark_inode_dirty(sbi->hidden_dir, |
590 | HFSPLUS_I_CAT_DIRTY); | |
591 | } | |
1da177e4 | 592 | } |
c5b8d0bc | 593 | |
1da177e4 LT |
594 | unload_nls(sbi->nls); |
595 | sbi->nls = nls; | |
596 | return 0; | |
597 | ||
c5b8d0bc | 598 | out_put_hidden_dir: |
66072c29 | 599 | cancel_delayed_work_sync(&sbi->sync_work); |
c5b8d0bc CH |
600 | iput(sbi->hidden_dir); |
601 | out_put_root: | |
68acb8e6 AV |
602 | dput(sb->s_root); |
603 | sb->s_root = NULL; | |
c5b8d0bc CH |
604 | out_put_alloc_file: |
605 | iput(sbi->alloc_file); | |
324ef39a VD |
606 | out_close_attr_tree: |
607 | hfs_btree_close(sbi->attr_tree); | |
c5b8d0bc CH |
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: | |
f588c960 SF |
613 | kfree(sbi->s_vhdr_buf); |
614 | kfree(sbi->s_backup_vhdr_buf); | |
c5b8d0bc CH |
615 | out_unload_nls: |
616 | unload_nls(sbi->nls); | |
6d729e44 | 617 | unload_nls(nls); |
c5b8d0bc CH |
618 | kfree(sbi); |
619 | out: | |
1da177e4 LT |
620 | return err; |
621 | } | |
622 | ||
623 | MODULE_AUTHOR("Brad Boyer"); | |
624 | MODULE_DESCRIPTION("Extended Macintosh Filesystem"); | |
625 | MODULE_LICENSE("GPL"); | |
626 | ||
e18b890b | 627 | static struct kmem_cache *hfsplus_inode_cachep; |
1da177e4 LT |
628 | |
629 | static struct inode *hfsplus_alloc_inode(struct super_block *sb) | |
630 | { | |
631 | struct hfsplus_inode_info *i; | |
632 | ||
fd60b288 | 633 | i = alloc_inode_sb(sb, hfsplus_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
634 | return i ? &i->vfs_inode : NULL; |
635 | } | |
636 | ||
08ab2293 | 637 | static void hfsplus_free_inode(struct inode *inode) |
1da177e4 | 638 | { |
6af502de | 639 | kmem_cache_free(hfsplus_inode_cachep, HFSPLUS_I(inode)); |
1da177e4 LT |
640 | } |
641 | ||
642 | #define HFSPLUS_INODE_SIZE sizeof(struct hfsplus_inode_info) | |
643 | ||
152a0836 AV |
644 | static struct dentry *hfsplus_mount(struct file_system_type *fs_type, |
645 | int flags, const char *dev_name, void *data) | |
1da177e4 | 646 | { |
152a0836 | 647 | return mount_bdev(fs_type, flags, dev_name, data, hfsplus_fill_super); |
1da177e4 LT |
648 | } |
649 | ||
650 | static struct file_system_type hfsplus_fs_type = { | |
651 | .owner = THIS_MODULE, | |
652 | .name = "hfsplus", | |
152a0836 | 653 | .mount = hfsplus_mount, |
1da177e4 LT |
654 | .kill_sb = kill_block_super, |
655 | .fs_flags = FS_REQUIRES_DEV, | |
656 | }; | |
7f78e035 | 657 | MODULE_ALIAS_FS("hfsplus"); |
1da177e4 | 658 | |
51cc5068 | 659 | static void hfsplus_init_once(void *p) |
1da177e4 LT |
660 | { |
661 | struct hfsplus_inode_info *i = p; | |
662 | ||
a35afb83 | 663 | inode_init_once(&i->vfs_inode); |
1da177e4 LT |
664 | } |
665 | ||
666 | static int __init init_hfsplus_fs(void) | |
667 | { | |
668 | int err; | |
669 | ||
670 | hfsplus_inode_cachep = kmem_cache_create("hfsplus_icache", | |
5d097056 | 671 | HFSPLUS_INODE_SIZE, 0, SLAB_HWCACHE_ALIGN|SLAB_ACCOUNT, |
20c2df83 | 672 | hfsplus_init_once); |
1da177e4 LT |
673 | if (!hfsplus_inode_cachep) |
674 | return -ENOMEM; | |
324ef39a VD |
675 | err = hfsplus_create_attr_tree_cache(); |
676 | if (err) | |
677 | goto destroy_inode_cache; | |
1da177e4 LT |
678 | err = register_filesystem(&hfsplus_fs_type); |
679 | if (err) | |
324ef39a VD |
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 | ||
1da177e4 LT |
689 | return err; |
690 | } | |
691 | ||
692 | static void __exit exit_hfsplus_fs(void) | |
693 | { | |
694 | unregister_filesystem(&hfsplus_fs_type); | |
8c0a8537 KS |
695 | |
696 | /* | |
697 | * Make sure all delayed rcu free inodes are flushed before we | |
698 | * destroy cache. | |
699 | */ | |
700 | rcu_barrier(); | |
324ef39a | 701 | hfsplus_destroy_attr_tree_cache(); |
1a1d92c1 | 702 | kmem_cache_destroy(hfsplus_inode_cachep); |
1da177e4 LT |
703 | } |
704 | ||
705 | module_init(init_hfsplus_fs) | |
706 | module_exit(exit_hfsplus_fs) |