Commit | Line | Data |
---|---|---|
1da177e4 LT |
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 | ||
1da177e4 LT |
10 | #include <linux/module.h> |
11 | #include <linux/init.h> | |
12 | #include <linux/pagemap.h> | |
34a2d313 | 13 | #include <linux/blkdev.h> |
66114cad | 14 | #include <linux/backing-dev.h> |
1da177e4 | 15 | #include <linux/fs.h> |
1da177e4 | 16 | #include <linux/slab.h> |
1da177e4 LT |
17 | #include <linux/vfs.h> |
18 | #include <linux/nls.h> | |
19 | ||
20 | static struct inode *hfsplus_alloc_inode(struct super_block *sb); | |
21 | static void hfsplus_destroy_inode(struct inode *inode); | |
22 | ||
23 | #include "hfsplus_fs.h" | |
324ef39a | 24 | #include "xattr.h" |
1da177e4 | 25 | |
fc4fff82 CH |
26 | static int hfsplus_system_read_inode(struct inode *inode) |
27 | { | |
28 | struct hfsplus_vh *vhdr = HFSPLUS_SB(inode->i_sb)->s_vhdr; | |
29 | ||
30 | switch (inode->i_ino) { | |
31 | case HFSPLUS_EXT_CNID: | |
32 | hfsplus_inode_read_fork(inode, &vhdr->ext_file); | |
33 | inode->i_mapping->a_ops = &hfsplus_btree_aops; | |
34 | break; | |
35 | case HFSPLUS_CAT_CNID: | |
36 | hfsplus_inode_read_fork(inode, &vhdr->cat_file); | |
37 | inode->i_mapping->a_ops = &hfsplus_btree_aops; | |
38 | break; | |
39 | case HFSPLUS_ALLOC_CNID: | |
40 | hfsplus_inode_read_fork(inode, &vhdr->alloc_file); | |
41 | inode->i_mapping->a_ops = &hfsplus_aops; | |
42 | break; | |
43 | case HFSPLUS_START_CNID: | |
44 | hfsplus_inode_read_fork(inode, &vhdr->start_file); | |
45 | break; | |
46 | case HFSPLUS_ATTR_CNID: | |
47 | hfsplus_inode_read_fork(inode, &vhdr->attr_file); | |
48 | inode->i_mapping->a_ops = &hfsplus_btree_aops; | |
49 | break; | |
50 | default: | |
51 | return -EIO; | |
52 | } | |
53 | ||
54 | return 0; | |
55 | } | |
56 | ||
63525391 | 57 | struct inode *hfsplus_iget(struct super_block *sb, unsigned long ino) |
1da177e4 LT |
58 | { |
59 | struct hfs_find_data fd; | |
63525391 | 60 | struct inode *inode; |
fc4fff82 | 61 | int err; |
63525391 DH |
62 | |
63 | inode = iget_locked(sb, ino); | |
64 | if (!inode) | |
65 | return ERR_PTR(-ENOMEM); | |
66 | if (!(inode->i_state & I_NEW)) | |
67 | return inode; | |
1da177e4 | 68 | |
6af502de CH |
69 | INIT_LIST_HEAD(&HFSPLUS_I(inode)->open_dir_list); |
70 | mutex_init(&HFSPLUS_I(inode)->extents_lock); | |
71 | HFSPLUS_I(inode)->flags = 0; | |
b33b7921 | 72 | HFSPLUS_I(inode)->extent_state = 0; |
6af502de CH |
73 | HFSPLUS_I(inode)->rsrc_inode = NULL; |
74 | atomic_set(&HFSPLUS_I(inode)->opencnt, 0); | |
1da177e4 | 75 | |
fc4fff82 CH |
76 | if (inode->i_ino >= HFSPLUS_FIRSTUSER_CNID || |
77 | inode->i_ino == HFSPLUS_ROOT_CNID) { | |
5bd9d99d AK |
78 | err = hfs_find_init(HFSPLUS_SB(inode->i_sb)->cat_tree, &fd); |
79 | if (!err) { | |
80 | err = hfsplus_find_cat(inode->i_sb, inode->i_ino, &fd); | |
81 | if (!err) | |
82 | err = hfsplus_cat_read_inode(inode, &fd); | |
83 | hfs_find_exit(&fd); | |
84 | } | |
fc4fff82 CH |
85 | } else { |
86 | err = hfsplus_system_read_inode(inode); | |
1da177e4 | 87 | } |
fc4fff82 CH |
88 | |
89 | if (err) { | |
90 | iget_failed(inode); | |
91 | return ERR_PTR(err); | |
1da177e4 LT |
92 | } |
93 | ||
63525391 DH |
94 | unlock_new_inode(inode); |
95 | return inode; | |
1da177e4 LT |
96 | } |
97 | ||
b5080f77 | 98 | static int hfsplus_system_write_inode(struct inode *inode) |
1da177e4 | 99 | { |
dd73a01a | 100 | struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb); |
b5080f77 CH |
101 | struct hfsplus_vh *vhdr = sbi->s_vhdr; |
102 | struct hfsplus_fork_raw *fork; | |
103 | struct hfs_btree *tree = NULL; | |
1da177e4 | 104 | |
1da177e4 | 105 | switch (inode->i_ino) { |
1da177e4 | 106 | case HFSPLUS_EXT_CNID: |
b5080f77 CH |
107 | fork = &vhdr->ext_file; |
108 | tree = sbi->ext_tree; | |
1da177e4 LT |
109 | break; |
110 | case HFSPLUS_CAT_CNID: | |
b5080f77 CH |
111 | fork = &vhdr->cat_file; |
112 | tree = sbi->cat_tree; | |
1da177e4 LT |
113 | break; |
114 | case HFSPLUS_ALLOC_CNID: | |
b5080f77 | 115 | fork = &vhdr->alloc_file; |
1da177e4 LT |
116 | break; |
117 | case HFSPLUS_START_CNID: | |
b5080f77 | 118 | fork = &vhdr->start_file; |
1da177e4 LT |
119 | break; |
120 | case HFSPLUS_ATTR_CNID: | |
b5080f77 CH |
121 | fork = &vhdr->attr_file; |
122 | tree = sbi->attr_tree; | |
324ef39a | 123 | break; |
b5080f77 CH |
124 | default: |
125 | return -EIO; | |
126 | } | |
127 | ||
128 | if (fork->total_size != cpu_to_be64(inode->i_size)) { | |
84adede3 | 129 | set_bit(HFSPLUS_SB_WRITEBACKUP, &sbi->flags); |
9e6c5829 | 130 | hfsplus_mark_mdb_dirty(inode->i_sb); |
1da177e4 | 131 | } |
b5080f77 | 132 | hfsplus_inode_write_fork(inode, fork); |
81cc7fad VD |
133 | if (tree) { |
134 | int err = hfs_btree_write(tree); | |
b73f3d0e | 135 | |
81cc7fad | 136 | if (err) { |
d6142673 | 137 | pr_err("b-tree write err: %d, ino %lu\n", |
b73f3d0e | 138 | err, inode->i_ino); |
81cc7fad VD |
139 | return err; |
140 | } | |
141 | } | |
b5080f77 CH |
142 | return 0; |
143 | } | |
144 | ||
145 | static int hfsplus_write_inode(struct inode *inode, | |
146 | struct writeback_control *wbc) | |
147 | { | |
dd7f3d54 AK |
148 | int err; |
149 | ||
c2b3e1f7 | 150 | hfs_dbg(INODE, "hfsplus_write_inode: %lu\n", inode->i_ino); |
b5080f77 | 151 | |
dd7f3d54 AK |
152 | err = hfsplus_ext_write_extent(inode); |
153 | if (err) | |
154 | return err; | |
b5080f77 CH |
155 | |
156 | if (inode->i_ino >= HFSPLUS_FIRSTUSER_CNID || | |
157 | inode->i_ino == HFSPLUS_ROOT_CNID) | |
158 | return hfsplus_cat_write_inode(inode); | |
159 | else | |
160 | return hfsplus_system_write_inode(inode); | |
1da177e4 LT |
161 | } |
162 | ||
b57922d9 | 163 | static void hfsplus_evict_inode(struct inode *inode) |
1da177e4 | 164 | { |
c2b3e1f7 | 165 | hfs_dbg(INODE, "hfsplus_evict_inode: %lu\n", inode->i_ino); |
91b0abe3 | 166 | truncate_inode_pages_final(&inode->i_data); |
dbd5768f | 167 | clear_inode(inode); |
1da177e4 | 168 | if (HFSPLUS_IS_RSRC(inode)) { |
6af502de CH |
169 | HFSPLUS_I(HFSPLUS_I(inode)->rsrc_inode)->rsrc_inode = NULL; |
170 | iput(HFSPLUS_I(inode)->rsrc_inode); | |
1da177e4 | 171 | } |
1da177e4 LT |
172 | } |
173 | ||
0a818619 | 174 | static int hfsplus_sync_fs(struct super_block *sb, int wait) |
1da177e4 | 175 | { |
dd73a01a CH |
176 | struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb); |
177 | struct hfsplus_vh *vhdr = sbi->s_vhdr; | |
52399b17 CH |
178 | int write_backup = 0; |
179 | int error, error2; | |
1da177e4 | 180 | |
f02e26f8 CH |
181 | if (!wait) |
182 | return 0; | |
1da177e4 | 183 | |
c2b3e1f7 | 184 | hfs_dbg(SUPER, "hfsplus_sync_fs\n"); |
ebc1ac16 | 185 | |
7dc4f001 CH |
186 | /* |
187 | * Explicitly write out the special metadata inodes. | |
188 | * | |
189 | * While these special inodes are marked as hashed and written | |
190 | * out peridocically by the flusher threads we redirty them | |
191 | * during writeout of normal inodes, and thus the life lock | |
192 | * prevents us from getting the latest state to disk. | |
193 | */ | |
194 | error = filemap_write_and_wait(sbi->cat_tree->inode->i_mapping); | |
195 | error2 = filemap_write_and_wait(sbi->ext_tree->inode->i_mapping); | |
196 | if (!error) | |
197 | error = error2; | |
324ef39a VD |
198 | if (sbi->attr_tree) { |
199 | error2 = | |
200 | filemap_write_and_wait(sbi->attr_tree->inode->i_mapping); | |
201 | if (!error) | |
202 | error = error2; | |
203 | } | |
7dc4f001 CH |
204 | error2 = filemap_write_and_wait(sbi->alloc_file->i_mapping); |
205 | if (!error) | |
206 | error = error2; | |
207 | ||
52399b17 CH |
208 | mutex_lock(&sbi->vh_mutex); |
209 | mutex_lock(&sbi->alloc_mutex); | |
dd73a01a | 210 | vhdr->free_blocks = cpu_to_be32(sbi->free_blocks); |
dd73a01a CH |
211 | vhdr->next_cnid = cpu_to_be32(sbi->next_cnid); |
212 | vhdr->folder_count = cpu_to_be32(sbi->folder_count); | |
213 | vhdr->file_count = cpu_to_be32(sbi->file_count); | |
1da177e4 | 214 | |
84adede3 | 215 | if (test_and_clear_bit(HFSPLUS_SB_WRITEBACKUP, &sbi->flags)) { |
52399b17 CH |
216 | memcpy(sbi->s_backup_vhdr, sbi->s_vhdr, sizeof(*sbi->s_vhdr)); |
217 | write_backup = 1; | |
1da177e4 | 218 | } |
52399b17 | 219 | |
6596528e | 220 | error2 = hfsplus_submit_bio(sb, |
52399b17 | 221 | sbi->part_start + HFSPLUS_VOLHEAD_SECTOR, |
6596528e | 222 | sbi->s_vhdr_buf, NULL, WRITE_SYNC); |
7dc4f001 CH |
223 | if (!error) |
224 | error = error2; | |
52399b17 CH |
225 | if (!write_backup) |
226 | goto out; | |
227 | ||
6596528e | 228 | error2 = hfsplus_submit_bio(sb, |
52399b17 | 229 | sbi->part_start + sbi->sect_count - 2, |
6596528e | 230 | sbi->s_backup_vhdr_buf, NULL, WRITE_SYNC); |
52399b17 CH |
231 | if (!error) |
232 | error2 = error; | |
233 | out: | |
dd73a01a | 234 | mutex_unlock(&sbi->alloc_mutex); |
7ac9fb9c | 235 | mutex_unlock(&sbi->vh_mutex); |
34a2d313 CH |
236 | |
237 | if (!test_bit(HFSPLUS_SB_NOBARRIER, &sbi->flags)) | |
238 | blkdev_issue_flush(sb->s_bdev, GFP_KERNEL, NULL); | |
239 | ||
52399b17 | 240 | return error; |
7fbc6df0 CH |
241 | } |
242 | ||
9e6c5829 | 243 | static void delayed_sync_fs(struct work_struct *work) |
7fbc6df0 | 244 | { |
bffdd661 | 245 | int err; |
9e6c5829 AB |
246 | struct hfsplus_sb_info *sbi; |
247 | ||
248 | sbi = container_of(work, struct hfsplus_sb_info, sync_work.work); | |
249 | ||
250 | spin_lock(&sbi->work_lock); | |
251 | sbi->work_queued = 0; | |
252 | spin_unlock(&sbi->work_lock); | |
253 | ||
bffdd661 VD |
254 | err = hfsplus_sync_fs(sbi->alloc_file->i_sb, 1); |
255 | if (err) | |
d6142673 | 256 | pr_err("delayed sync fs err %d\n", err); |
9e6c5829 AB |
257 | } |
258 | ||
259 | void hfsplus_mark_mdb_dirty(struct super_block *sb) | |
260 | { | |
261 | struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb); | |
262 | unsigned long delay; | |
263 | ||
264 | if (sb->s_flags & MS_RDONLY) | |
265 | return; | |
266 | ||
267 | spin_lock(&sbi->work_lock); | |
268 | if (!sbi->work_queued) { | |
269 | delay = msecs_to_jiffies(dirty_writeback_interval * 10); | |
270 | queue_delayed_work(system_long_wq, &sbi->sync_work, delay); | |
271 | sbi->work_queued = 1; | |
272 | } | |
273 | spin_unlock(&sbi->work_lock); | |
1da177e4 LT |
274 | } |
275 | ||
276 | static void hfsplus_put_super(struct super_block *sb) | |
277 | { | |
dd73a01a CH |
278 | struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb); |
279 | ||
c2b3e1f7 | 280 | hfs_dbg(SUPER, "hfsplus_put_super\n"); |
dd73a01a | 281 | |
9e6c5829 AB |
282 | cancel_delayed_work_sync(&sbi->sync_work); |
283 | ||
dd73a01a CH |
284 | if (!(sb->s_flags & MS_RDONLY) && sbi->s_vhdr) { |
285 | struct hfsplus_vh *vhdr = sbi->s_vhdr; | |
1da177e4 LT |
286 | |
287 | vhdr->modify_date = hfsp_now2mt(); | |
288 | vhdr->attributes |= cpu_to_be32(HFSPLUS_VOL_UNMNT); | |
289 | vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_INCNSTNT); | |
3b5ce8ae CH |
290 | |
291 | hfsplus_sync_fs(sb, 1); | |
1da177e4 LT |
292 | } |
293 | ||
324ef39a | 294 | hfs_btree_close(sbi->attr_tree); |
dd73a01a CH |
295 | hfs_btree_close(sbi->cat_tree); |
296 | hfs_btree_close(sbi->ext_tree); | |
297 | iput(sbi->alloc_file); | |
298 | iput(sbi->hidden_dir); | |
6596528e SF |
299 | kfree(sbi->s_vhdr_buf); |
300 | kfree(sbi->s_backup_vhdr_buf); | |
dd73a01a | 301 | unload_nls(sbi->nls); |
945b0920 CL |
302 | kfree(sb->s_fs_info); |
303 | sb->s_fs_info = NULL; | |
1da177e4 LT |
304 | } |
305 | ||
726c3342 | 306 | static int hfsplus_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 307 | { |
726c3342 | 308 | struct super_block *sb = dentry->d_sb; |
dd73a01a | 309 | struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb); |
25564dd8 | 310 | u64 id = huge_encode_dev(sb->s_bdev->bd_dev); |
726c3342 | 311 | |
1da177e4 LT |
312 | buf->f_type = HFSPLUS_SUPER_MAGIC; |
313 | buf->f_bsize = sb->s_blocksize; | |
dd73a01a CH |
314 | buf->f_blocks = sbi->total_blocks << sbi->fs_shift; |
315 | buf->f_bfree = sbi->free_blocks << sbi->fs_shift; | |
1da177e4 LT |
316 | buf->f_bavail = buf->f_bfree; |
317 | buf->f_files = 0xFFFFFFFF; | |
dd73a01a | 318 | buf->f_ffree = 0xFFFFFFFF - sbi->next_cnid; |
25564dd8 CL |
319 | buf->f_fsid.val[0] = (u32)id; |
320 | buf->f_fsid.val[1] = (u32)(id >> 32); | |
1da177e4 LT |
321 | buf->f_namelen = HFSPLUS_MAX_STRLEN; |
322 | ||
323 | return 0; | |
324 | } | |
325 | ||
326 | static int hfsplus_remount(struct super_block *sb, int *flags, char *data) | |
327 | { | |
02b9984d | 328 | sync_filesystem(sb); |
1da177e4 LT |
329 | if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) |
330 | return 0; | |
331 | if (!(*flags & MS_RDONLY)) { | |
dd73a01a | 332 | struct hfsplus_vh *vhdr = HFSPLUS_SB(sb)->s_vhdr; |
6f80dfe5 | 333 | int force = 0; |
b0b623c3 | 334 | |
6f80dfe5 | 335 | if (!hfsplus_parse_options_remount(data, &force)) |
b0b623c3 | 336 | return -EINVAL; |
1da177e4 LT |
337 | |
338 | if (!(vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_UNMNT))) { | |
d6142673 | 339 | pr_warn("filesystem was not cleanly unmounted, running fsck.hfsplus is recommended. leaving read-only.\n"); |
1da177e4 LT |
340 | sb->s_flags |= MS_RDONLY; |
341 | *flags |= MS_RDONLY; | |
6f80dfe5 | 342 | } else if (force) { |
b0b623c3 | 343 | /* nothing */ |
2753cc28 AS |
344 | } else if (vhdr->attributes & |
345 | cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) { | |
d6142673 | 346 | pr_warn("filesystem is marked locked, leaving read-only.\n"); |
1da177e4 LT |
347 | sb->s_flags |= MS_RDONLY; |
348 | *flags |= MS_RDONLY; | |
2753cc28 AS |
349 | } else if (vhdr->attributes & |
350 | cpu_to_be32(HFSPLUS_VOL_JOURNALED)) { | |
d6142673 | 351 | pr_warn("filesystem is marked journaled, leaving read-only.\n"); |
b0b623c3 RZ |
352 | sb->s_flags |= MS_RDONLY; |
353 | *flags |= MS_RDONLY; | |
1da177e4 LT |
354 | } |
355 | } | |
356 | return 0; | |
357 | } | |
358 | ||
ee9b6d61 | 359 | static const struct super_operations hfsplus_sops = { |
1da177e4 LT |
360 | .alloc_inode = hfsplus_alloc_inode, |
361 | .destroy_inode = hfsplus_destroy_inode, | |
1da177e4 | 362 | .write_inode = hfsplus_write_inode, |
b57922d9 | 363 | .evict_inode = hfsplus_evict_inode, |
1da177e4 | 364 | .put_super = hfsplus_put_super, |
7fbc6df0 | 365 | .sync_fs = hfsplus_sync_fs, |
1da177e4 LT |
366 | .statfs = hfsplus_statfs, |
367 | .remount_fs = hfsplus_remount, | |
717dd80e | 368 | .show_options = hfsplus_show_options, |
1da177e4 LT |
369 | }; |
370 | ||
371 | static int hfsplus_fill_super(struct super_block *sb, void *data, int silent) | |
372 | { | |
373 | struct hfsplus_vh *vhdr; | |
374 | struct hfsplus_sb_info *sbi; | |
375 | hfsplus_cat_entry entry; | |
376 | struct hfs_find_data fd; | |
63525391 | 377 | struct inode *root, *inode; |
1da177e4 LT |
378 | struct qstr str; |
379 | struct nls_table *nls = NULL; | |
f1fcd9f0 | 380 | u64 last_fs_block, last_fs_page; |
c5b8d0bc | 381 | int err; |
1da177e4 | 382 | |
497d48bd | 383 | err = -ENOMEM; |
a5001a27 | 384 | sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); |
1da177e4 | 385 | if (!sbi) |
c5b8d0bc | 386 | goto out; |
1da177e4 | 387 | |
1da177e4 | 388 | sb->s_fs_info = sbi; |
40bf48af | 389 | mutex_init(&sbi->alloc_mutex); |
7ac9fb9c | 390 | mutex_init(&sbi->vh_mutex); |
9e6c5829 AB |
391 | spin_lock_init(&sbi->work_lock); |
392 | INIT_DELAYED_WORK(&sbi->sync_work, delayed_sync_fs); | |
717dd80e | 393 | hfsplus_fill_defaults(sbi); |
c5b8d0bc CH |
394 | |
395 | err = -EINVAL; | |
717dd80e | 396 | if (!hfsplus_parse_options(data, sbi)) { |
d6142673 | 397 | pr_err("unable to parse mount options\n"); |
c5b8d0bc | 398 | goto out_unload_nls; |
1da177e4 LT |
399 | } |
400 | ||
401 | /* temporarily use utf8 to correctly find the hidden dir below */ | |
402 | nls = sbi->nls; | |
403 | sbi->nls = load_nls("utf8"); | |
bd6a59b2 | 404 | if (!sbi->nls) { |
d6142673 | 405 | pr_err("unable to load nls for utf8\n"); |
c5b8d0bc | 406 | goto out_unload_nls; |
1da177e4 LT |
407 | } |
408 | ||
409 | /* Grab the volume header */ | |
410 | if (hfsplus_read_wrapper(sb)) { | |
411 | if (!silent) | |
d6142673 | 412 | pr_warn("unable to find HFS+ superblock\n"); |
c5b8d0bc | 413 | goto out_unload_nls; |
1da177e4 | 414 | } |
dd73a01a | 415 | vhdr = sbi->s_vhdr; |
1da177e4 LT |
416 | |
417 | /* Copy parts of the volume header into the superblock */ | |
2179d372 DE |
418 | sb->s_magic = HFSPLUS_VOLHEAD_SIG; |
419 | if (be16_to_cpu(vhdr->version) < HFSPLUS_MIN_VERSION || | |
420 | be16_to_cpu(vhdr->version) > HFSPLUS_CURRENT_VERSION) { | |
d6142673 | 421 | pr_err("wrong filesystem version\n"); |
c5b8d0bc | 422 | goto out_free_vhdr; |
1da177e4 | 423 | } |
dd73a01a CH |
424 | sbi->total_blocks = be32_to_cpu(vhdr->total_blocks); |
425 | sbi->free_blocks = be32_to_cpu(vhdr->free_blocks); | |
dd73a01a CH |
426 | sbi->next_cnid = be32_to_cpu(vhdr->next_cnid); |
427 | sbi->file_count = be32_to_cpu(vhdr->file_count); | |
428 | sbi->folder_count = be32_to_cpu(vhdr->folder_count); | |
429 | sbi->data_clump_blocks = | |
430 | be32_to_cpu(vhdr->data_clump_sz) >> sbi->alloc_blksz_shift; | |
431 | if (!sbi->data_clump_blocks) | |
432 | sbi->data_clump_blocks = 1; | |
433 | sbi->rsrc_clump_blocks = | |
434 | be32_to_cpu(vhdr->rsrc_clump_sz) >> sbi->alloc_blksz_shift; | |
435 | if (!sbi->rsrc_clump_blocks) | |
436 | sbi->rsrc_clump_blocks = 1; | |
1da177e4 | 437 | |
f1fcd9f0 CH |
438 | err = -EFBIG; |
439 | last_fs_block = sbi->total_blocks - 1; | |
440 | last_fs_page = (last_fs_block << sbi->alloc_blksz_shift) >> | |
09cbfeaf | 441 | PAGE_SHIFT; |
f1fcd9f0 CH |
442 | |
443 | if ((last_fs_block > (sector_t)(~0ULL) >> (sbi->alloc_blksz_shift - 9)) || | |
444 | (last_fs_page > (pgoff_t)(~0ULL))) { | |
d6142673 | 445 | pr_err("filesystem size too large\n"); |
c6d5f5fa CH |
446 | goto out_free_vhdr; |
447 | } | |
448 | ||
1da177e4 LT |
449 | /* Set up operations so we can load metadata */ |
450 | sb->s_op = &hfsplus_sops; | |
451 | sb->s_maxbytes = MAX_LFS_FILESIZE; | |
452 | ||
453 | if (!(vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_UNMNT))) { | |
d6142673 | 454 | pr_warn("Filesystem was not cleanly unmounted, running fsck.hfsplus is recommended. mounting read-only.\n"); |
1da177e4 | 455 | sb->s_flags |= MS_RDONLY; |
84adede3 | 456 | } else if (test_and_clear_bit(HFSPLUS_SB_FORCE, &sbi->flags)) { |
b0b623c3 | 457 | /* nothing */ |
1da177e4 | 458 | } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) { |
d6142673 | 459 | pr_warn("Filesystem is marked locked, mounting read-only.\n"); |
1da177e4 | 460 | sb->s_flags |= MS_RDONLY; |
2753cc28 AS |
461 | } else if ((vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_JOURNALED)) && |
462 | !(sb->s_flags & MS_RDONLY)) { | |
d6142673 | 463 | pr_warn("write access to a journaled filesystem is not supported, use the force option at your own risk, mounting read-only.\n"); |
b0b623c3 | 464 | sb->s_flags |= MS_RDONLY; |
1da177e4 LT |
465 | } |
466 | ||
c6d5f5fa CH |
467 | err = -EINVAL; |
468 | ||
1da177e4 | 469 | /* Load metadata objects (B*Trees) */ |
dd73a01a CH |
470 | sbi->ext_tree = hfs_btree_open(sb, HFSPLUS_EXT_CNID); |
471 | if (!sbi->ext_tree) { | |
d6142673 | 472 | pr_err("failed to load extents file\n"); |
c5b8d0bc | 473 | goto out_free_vhdr; |
1da177e4 | 474 | } |
dd73a01a CH |
475 | sbi->cat_tree = hfs_btree_open(sb, HFSPLUS_CAT_CNID); |
476 | if (!sbi->cat_tree) { | |
d6142673 | 477 | pr_err("failed to load catalog file\n"); |
c5b8d0bc | 478 | goto out_close_ext_tree; |
1da177e4 | 479 | } |
95e0d7db | 480 | atomic_set(&sbi->attr_tree_state, HFSPLUS_EMPTY_ATTR_TREE); |
324ef39a VD |
481 | if (vhdr->attr_file.total_blocks != 0) { |
482 | sbi->attr_tree = hfs_btree_open(sb, HFSPLUS_ATTR_CNID); | |
483 | if (!sbi->attr_tree) { | |
d6142673 | 484 | pr_err("failed to load attributes file\n"); |
324ef39a VD |
485 | goto out_close_cat_tree; |
486 | } | |
95e0d7db | 487 | atomic_set(&sbi->attr_tree_state, HFSPLUS_VALID_ATTR_TREE); |
324ef39a VD |
488 | } |
489 | sb->s_xattr = hfsplus_xattr_handlers; | |
1da177e4 | 490 | |
63525391 DH |
491 | inode = hfsplus_iget(sb, HFSPLUS_ALLOC_CNID); |
492 | if (IS_ERR(inode)) { | |
d6142673 | 493 | pr_err("failed to load allocation file\n"); |
63525391 | 494 | err = PTR_ERR(inode); |
324ef39a | 495 | goto out_close_attr_tree; |
1da177e4 | 496 | } |
dd73a01a | 497 | sbi->alloc_file = inode; |
1da177e4 LT |
498 | |
499 | /* Load the root directory */ | |
63525391 DH |
500 | root = hfsplus_iget(sb, HFSPLUS_ROOT_CNID); |
501 | if (IS_ERR(root)) { | |
d6142673 | 502 | pr_err("failed to load root directory\n"); |
63525391 | 503 | err = PTR_ERR(root); |
c5b8d0bc | 504 | goto out_put_alloc_file; |
1da177e4 LT |
505 | } |
506 | ||
68acb8e6 AV |
507 | sb->s_d_op = &hfsplus_dentry_operations; |
508 | sb->s_root = d_make_root(root); | |
509 | if (!sb->s_root) { | |
510 | err = -ENOMEM; | |
511 | goto out_put_alloc_file; | |
512 | } | |
513 | ||
1da177e4 LT |
514 | str.len = sizeof(HFSP_HIDDENDIR_NAME) - 1; |
515 | str.name = HFSP_HIDDENDIR_NAME; | |
5bd9d99d AK |
516 | err = hfs_find_init(sbi->cat_tree, &fd); |
517 | if (err) | |
518 | goto out_put_root; | |
89ac9b4d SS |
519 | err = hfsplus_cat_build_key(sb, fd.search_key, HFSPLUS_ROOT_CNID, &str); |
520 | if (unlikely(err < 0)) | |
521 | goto out_put_root; | |
1da177e4 LT |
522 | if (!hfs_brec_read(&fd, &entry, sizeof(entry))) { |
523 | hfs_find_exit(&fd); | |
524 | if (entry.type != cpu_to_be16(HFSPLUS_FOLDER)) | |
c5b8d0bc | 525 | goto out_put_root; |
63525391 DH |
526 | inode = hfsplus_iget(sb, be32_to_cpu(entry.folder.id)); |
527 | if (IS_ERR(inode)) { | |
528 | err = PTR_ERR(inode); | |
c5b8d0bc | 529 | goto out_put_root; |
63525391 | 530 | } |
dd73a01a | 531 | sbi->hidden_dir = inode; |
1da177e4 LT |
532 | } else |
533 | hfs_find_exit(&fd); | |
534 | ||
c5b8d0bc CH |
535 | if (!(sb->s_flags & MS_RDONLY)) { |
536 | /* | |
537 | * H+LX == hfsplusutils, H+Lx == this driver, H+lx is unused | |
538 | * all three are registered with Apple for our use | |
539 | */ | |
540 | vhdr->last_mount_vers = cpu_to_be32(HFSP_MOUNT_VERSION); | |
541 | vhdr->modify_date = hfsp_now2mt(); | |
542 | be32_add_cpu(&vhdr->write_count, 1); | |
543 | vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_UNMNT); | |
544 | vhdr->attributes |= cpu_to_be32(HFSPLUS_VOL_INCNSTNT); | |
545 | hfsplus_sync_fs(sb, 1); | |
1da177e4 | 546 | |
c5b8d0bc CH |
547 | if (!sbi->hidden_dir) { |
548 | mutex_lock(&sbi->vh_mutex); | |
549 | sbi->hidden_dir = hfsplus_new_inode(sb, S_IFDIR); | |
b3f2a924 AV |
550 | if (!sbi->hidden_dir) { |
551 | mutex_unlock(&sbi->vh_mutex); | |
552 | err = -ENOMEM; | |
553 | goto out_put_root; | |
554 | } | |
555 | err = hfsplus_create_cat(sbi->hidden_dir->i_ino, root, | |
556 | &str, sbi->hidden_dir); | |
324ef39a VD |
557 | if (err) { |
558 | mutex_unlock(&sbi->vh_mutex); | |
559 | goto out_put_hidden_dir; | |
560 | } | |
561 | ||
562 | err = hfsplus_init_inode_security(sbi->hidden_dir, | |
563 | root, &str); | |
564 | if (err == -EOPNOTSUPP) | |
565 | err = 0; /* Operation is not supported. */ | |
566 | else if (err) { | |
567 | /* | |
568 | * Try to delete anyway without | |
569 | * error analysis. | |
570 | */ | |
571 | hfsplus_delete_cat(sbi->hidden_dir->i_ino, | |
572 | root, &str); | |
573 | mutex_unlock(&sbi->vh_mutex); | |
b3f2a924 | 574 | goto out_put_hidden_dir; |
324ef39a | 575 | } |
c5b8d0bc | 576 | |
324ef39a | 577 | mutex_unlock(&sbi->vh_mutex); |
c5b8d0bc CH |
578 | hfsplus_mark_inode_dirty(sbi->hidden_dir, |
579 | HFSPLUS_I_CAT_DIRTY); | |
580 | } | |
1da177e4 | 581 | } |
c5b8d0bc | 582 | |
1da177e4 LT |
583 | unload_nls(sbi->nls); |
584 | sbi->nls = nls; | |
585 | return 0; | |
586 | ||
c5b8d0bc CH |
587 | out_put_hidden_dir: |
588 | iput(sbi->hidden_dir); | |
589 | out_put_root: | |
68acb8e6 AV |
590 | dput(sb->s_root); |
591 | sb->s_root = NULL; | |
c5b8d0bc CH |
592 | out_put_alloc_file: |
593 | iput(sbi->alloc_file); | |
324ef39a VD |
594 | out_close_attr_tree: |
595 | hfs_btree_close(sbi->attr_tree); | |
c5b8d0bc CH |
596 | out_close_cat_tree: |
597 | hfs_btree_close(sbi->cat_tree); | |
598 | out_close_ext_tree: | |
599 | hfs_btree_close(sbi->ext_tree); | |
600 | out_free_vhdr: | |
f588c960 SF |
601 | kfree(sbi->s_vhdr_buf); |
602 | kfree(sbi->s_backup_vhdr_buf); | |
c5b8d0bc CH |
603 | out_unload_nls: |
604 | unload_nls(sbi->nls); | |
6d729e44 | 605 | unload_nls(nls); |
c5b8d0bc CH |
606 | kfree(sbi); |
607 | out: | |
1da177e4 LT |
608 | return err; |
609 | } | |
610 | ||
611 | MODULE_AUTHOR("Brad Boyer"); | |
612 | MODULE_DESCRIPTION("Extended Macintosh Filesystem"); | |
613 | MODULE_LICENSE("GPL"); | |
614 | ||
e18b890b | 615 | static struct kmem_cache *hfsplus_inode_cachep; |
1da177e4 LT |
616 | |
617 | static struct inode *hfsplus_alloc_inode(struct super_block *sb) | |
618 | { | |
619 | struct hfsplus_inode_info *i; | |
620 | ||
e94b1766 | 621 | i = kmem_cache_alloc(hfsplus_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
622 | return i ? &i->vfs_inode : NULL; |
623 | } | |
624 | ||
fa0d7e3d | 625 | static void hfsplus_i_callback(struct rcu_head *head) |
1da177e4 | 626 | { |
fa0d7e3d NP |
627 | struct inode *inode = container_of(head, struct inode, i_rcu); |
628 | ||
6af502de | 629 | kmem_cache_free(hfsplus_inode_cachep, HFSPLUS_I(inode)); |
1da177e4 LT |
630 | } |
631 | ||
fa0d7e3d NP |
632 | static void hfsplus_destroy_inode(struct inode *inode) |
633 | { | |
634 | call_rcu(&inode->i_rcu, hfsplus_i_callback); | |
635 | } | |
636 | ||
1da177e4 LT |
637 | #define HFSPLUS_INODE_SIZE sizeof(struct hfsplus_inode_info) |
638 | ||
152a0836 AV |
639 | static struct dentry *hfsplus_mount(struct file_system_type *fs_type, |
640 | int flags, const char *dev_name, void *data) | |
1da177e4 | 641 | { |
152a0836 | 642 | return mount_bdev(fs_type, flags, dev_name, data, hfsplus_fill_super); |
1da177e4 LT |
643 | } |
644 | ||
645 | static struct file_system_type hfsplus_fs_type = { | |
646 | .owner = THIS_MODULE, | |
647 | .name = "hfsplus", | |
152a0836 | 648 | .mount = hfsplus_mount, |
1da177e4 LT |
649 | .kill_sb = kill_block_super, |
650 | .fs_flags = FS_REQUIRES_DEV, | |
651 | }; | |
7f78e035 | 652 | MODULE_ALIAS_FS("hfsplus"); |
1da177e4 | 653 | |
51cc5068 | 654 | static void hfsplus_init_once(void *p) |
1da177e4 LT |
655 | { |
656 | struct hfsplus_inode_info *i = p; | |
657 | ||
a35afb83 | 658 | inode_init_once(&i->vfs_inode); |
1da177e4 LT |
659 | } |
660 | ||
661 | static int __init init_hfsplus_fs(void) | |
662 | { | |
663 | int err; | |
664 | ||
665 | hfsplus_inode_cachep = kmem_cache_create("hfsplus_icache", | |
5d097056 | 666 | HFSPLUS_INODE_SIZE, 0, SLAB_HWCACHE_ALIGN|SLAB_ACCOUNT, |
20c2df83 | 667 | hfsplus_init_once); |
1da177e4 LT |
668 | if (!hfsplus_inode_cachep) |
669 | return -ENOMEM; | |
324ef39a VD |
670 | err = hfsplus_create_attr_tree_cache(); |
671 | if (err) | |
672 | goto destroy_inode_cache; | |
1da177e4 LT |
673 | err = register_filesystem(&hfsplus_fs_type); |
674 | if (err) | |
324ef39a VD |
675 | goto destroy_attr_tree_cache; |
676 | return 0; | |
677 | ||
678 | destroy_attr_tree_cache: | |
679 | hfsplus_destroy_attr_tree_cache(); | |
680 | ||
681 | destroy_inode_cache: | |
682 | kmem_cache_destroy(hfsplus_inode_cachep); | |
683 | ||
1da177e4 LT |
684 | return err; |
685 | } | |
686 | ||
687 | static void __exit exit_hfsplus_fs(void) | |
688 | { | |
689 | unregister_filesystem(&hfsplus_fs_type); | |
8c0a8537 KS |
690 | |
691 | /* | |
692 | * Make sure all delayed rcu free inodes are flushed before we | |
693 | * destroy cache. | |
694 | */ | |
695 | rcu_barrier(); | |
324ef39a | 696 | hfsplus_destroy_attr_tree_cache(); |
1a1d92c1 | 697 | kmem_cache_destroy(hfsplus_inode_cachep); |
1da177e4 LT |
698 | } |
699 | ||
700 | module_init(init_hfsplus_fs) | |
701 | module_exit(exit_hfsplus_fs) |