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> |
1da177e4 | 14 | #include <linux/fs.h> |
1da177e4 | 15 | #include <linux/slab.h> |
1da177e4 LT |
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 | ||
fc4fff82 CH |
24 | static int hfsplus_system_read_inode(struct inode *inode) |
25 | { | |
26 | struct hfsplus_vh *vhdr = HFSPLUS_SB(inode->i_sb)->s_vhdr; | |
27 | ||
28 | switch (inode->i_ino) { | |
29 | case HFSPLUS_EXT_CNID: | |
30 | hfsplus_inode_read_fork(inode, &vhdr->ext_file); | |
31 | inode->i_mapping->a_ops = &hfsplus_btree_aops; | |
32 | break; | |
33 | case HFSPLUS_CAT_CNID: | |
34 | hfsplus_inode_read_fork(inode, &vhdr->cat_file); | |
35 | inode->i_mapping->a_ops = &hfsplus_btree_aops; | |
36 | break; | |
37 | case HFSPLUS_ALLOC_CNID: | |
38 | hfsplus_inode_read_fork(inode, &vhdr->alloc_file); | |
39 | inode->i_mapping->a_ops = &hfsplus_aops; | |
40 | break; | |
41 | case HFSPLUS_START_CNID: | |
42 | hfsplus_inode_read_fork(inode, &vhdr->start_file); | |
43 | break; | |
44 | case HFSPLUS_ATTR_CNID: | |
45 | hfsplus_inode_read_fork(inode, &vhdr->attr_file); | |
46 | inode->i_mapping->a_ops = &hfsplus_btree_aops; | |
47 | break; | |
48 | default: | |
49 | return -EIO; | |
50 | } | |
51 | ||
52 | return 0; | |
53 | } | |
54 | ||
63525391 | 55 | struct inode *hfsplus_iget(struct super_block *sb, unsigned long ino) |
1da177e4 LT |
56 | { |
57 | struct hfs_find_data fd; | |
63525391 | 58 | struct inode *inode; |
fc4fff82 | 59 | int err; |
63525391 DH |
60 | |
61 | inode = iget_locked(sb, ino); | |
62 | if (!inode) | |
63 | return ERR_PTR(-ENOMEM); | |
64 | if (!(inode->i_state & I_NEW)) | |
65 | return inode; | |
1da177e4 | 66 | |
6af502de CH |
67 | INIT_LIST_HEAD(&HFSPLUS_I(inode)->open_dir_list); |
68 | mutex_init(&HFSPLUS_I(inode)->extents_lock); | |
69 | HFSPLUS_I(inode)->flags = 0; | |
b33b7921 | 70 | HFSPLUS_I(inode)->extent_state = 0; |
6af502de CH |
71 | HFSPLUS_I(inode)->rsrc_inode = NULL; |
72 | atomic_set(&HFSPLUS_I(inode)->opencnt, 0); | |
1da177e4 | 73 | |
fc4fff82 CH |
74 | if (inode->i_ino >= HFSPLUS_FIRSTUSER_CNID || |
75 | inode->i_ino == HFSPLUS_ROOT_CNID) { | |
5bd9d99d AK |
76 | err = hfs_find_init(HFSPLUS_SB(inode->i_sb)->cat_tree, &fd); |
77 | if (!err) { | |
78 | err = hfsplus_find_cat(inode->i_sb, inode->i_ino, &fd); | |
79 | if (!err) | |
80 | err = hfsplus_cat_read_inode(inode, &fd); | |
81 | hfs_find_exit(&fd); | |
82 | } | |
fc4fff82 CH |
83 | } else { |
84 | err = hfsplus_system_read_inode(inode); | |
1da177e4 | 85 | } |
fc4fff82 CH |
86 | |
87 | if (err) { | |
88 | iget_failed(inode); | |
89 | return ERR_PTR(err); | |
1da177e4 LT |
90 | } |
91 | ||
63525391 DH |
92 | unlock_new_inode(inode); |
93 | return inode; | |
1da177e4 LT |
94 | } |
95 | ||
b5080f77 | 96 | static int hfsplus_system_write_inode(struct inode *inode) |
1da177e4 | 97 | { |
dd73a01a | 98 | struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb); |
b5080f77 CH |
99 | struct hfsplus_vh *vhdr = sbi->s_vhdr; |
100 | struct hfsplus_fork_raw *fork; | |
101 | struct hfs_btree *tree = NULL; | |
1da177e4 | 102 | |
1da177e4 | 103 | switch (inode->i_ino) { |
1da177e4 | 104 | case HFSPLUS_EXT_CNID: |
b5080f77 CH |
105 | fork = &vhdr->ext_file; |
106 | tree = sbi->ext_tree; | |
1da177e4 LT |
107 | break; |
108 | case HFSPLUS_CAT_CNID: | |
b5080f77 CH |
109 | fork = &vhdr->cat_file; |
110 | tree = sbi->cat_tree; | |
1da177e4 LT |
111 | break; |
112 | case HFSPLUS_ALLOC_CNID: | |
b5080f77 | 113 | fork = &vhdr->alloc_file; |
1da177e4 LT |
114 | break; |
115 | case HFSPLUS_START_CNID: | |
b5080f77 | 116 | fork = &vhdr->start_file; |
1da177e4 LT |
117 | break; |
118 | case HFSPLUS_ATTR_CNID: | |
b5080f77 CH |
119 | fork = &vhdr->attr_file; |
120 | tree = sbi->attr_tree; | |
121 | default: | |
122 | return -EIO; | |
123 | } | |
124 | ||
125 | if (fork->total_size != cpu_to_be64(inode->i_size)) { | |
84adede3 | 126 | set_bit(HFSPLUS_SB_WRITEBACKUP, &sbi->flags); |
9e6c5829 | 127 | hfsplus_mark_mdb_dirty(inode->i_sb); |
1da177e4 | 128 | } |
b5080f77 | 129 | hfsplus_inode_write_fork(inode, fork); |
81cc7fad VD |
130 | if (tree) { |
131 | int err = hfs_btree_write(tree); | |
132 | if (err) { | |
133 | printk(KERN_ERR "hfs: b-tree write err: %d, ino %lu\n", | |
134 | err, inode->i_ino); | |
135 | return err; | |
136 | } | |
137 | } | |
b5080f77 CH |
138 | return 0; |
139 | } | |
140 | ||
141 | static int hfsplus_write_inode(struct inode *inode, | |
142 | struct writeback_control *wbc) | |
143 | { | |
dd7f3d54 AK |
144 | int err; |
145 | ||
b5080f77 CH |
146 | dprint(DBG_INODE, "hfsplus_write_inode: %lu\n", inode->i_ino); |
147 | ||
dd7f3d54 AK |
148 | err = hfsplus_ext_write_extent(inode); |
149 | if (err) | |
150 | return err; | |
b5080f77 CH |
151 | |
152 | if (inode->i_ino >= HFSPLUS_FIRSTUSER_CNID || | |
153 | inode->i_ino == HFSPLUS_ROOT_CNID) | |
154 | return hfsplus_cat_write_inode(inode); | |
155 | else | |
156 | return hfsplus_system_write_inode(inode); | |
1da177e4 LT |
157 | } |
158 | ||
b57922d9 | 159 | static void hfsplus_evict_inode(struct inode *inode) |
1da177e4 | 160 | { |
b57922d9 AV |
161 | dprint(DBG_INODE, "hfsplus_evict_inode: %lu\n", inode->i_ino); |
162 | truncate_inode_pages(&inode->i_data, 0); | |
dbd5768f | 163 | clear_inode(inode); |
1da177e4 | 164 | if (HFSPLUS_IS_RSRC(inode)) { |
6af502de CH |
165 | HFSPLUS_I(HFSPLUS_I(inode)->rsrc_inode)->rsrc_inode = NULL; |
166 | iput(HFSPLUS_I(inode)->rsrc_inode); | |
1da177e4 | 167 | } |
1da177e4 LT |
168 | } |
169 | ||
0a818619 | 170 | static int hfsplus_sync_fs(struct super_block *sb, int wait) |
1da177e4 | 171 | { |
dd73a01a CH |
172 | struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb); |
173 | struct hfsplus_vh *vhdr = sbi->s_vhdr; | |
52399b17 CH |
174 | int write_backup = 0; |
175 | int error, error2; | |
1da177e4 | 176 | |
f02e26f8 CH |
177 | if (!wait) |
178 | return 0; | |
1da177e4 | 179 | |
b7a90e80 | 180 | dprint(DBG_SUPER, "hfsplus_sync_fs\n"); |
ebc1ac16 | 181 | |
7dc4f001 CH |
182 | /* |
183 | * Explicitly write out the special metadata inodes. | |
184 | * | |
185 | * While these special inodes are marked as hashed and written | |
186 | * out peridocically by the flusher threads we redirty them | |
187 | * during writeout of normal inodes, and thus the life lock | |
188 | * prevents us from getting the latest state to disk. | |
189 | */ | |
190 | error = filemap_write_and_wait(sbi->cat_tree->inode->i_mapping); | |
191 | error2 = filemap_write_and_wait(sbi->ext_tree->inode->i_mapping); | |
192 | if (!error) | |
193 | error = error2; | |
194 | error2 = filemap_write_and_wait(sbi->alloc_file->i_mapping); | |
195 | if (!error) | |
196 | error = error2; | |
197 | ||
52399b17 CH |
198 | mutex_lock(&sbi->vh_mutex); |
199 | mutex_lock(&sbi->alloc_mutex); | |
dd73a01a | 200 | vhdr->free_blocks = cpu_to_be32(sbi->free_blocks); |
dd73a01a CH |
201 | vhdr->next_cnid = cpu_to_be32(sbi->next_cnid); |
202 | vhdr->folder_count = cpu_to_be32(sbi->folder_count); | |
203 | vhdr->file_count = cpu_to_be32(sbi->file_count); | |
1da177e4 | 204 | |
84adede3 | 205 | if (test_and_clear_bit(HFSPLUS_SB_WRITEBACKUP, &sbi->flags)) { |
52399b17 CH |
206 | memcpy(sbi->s_backup_vhdr, sbi->s_vhdr, sizeof(*sbi->s_vhdr)); |
207 | write_backup = 1; | |
1da177e4 | 208 | } |
52399b17 | 209 | |
6596528e | 210 | error2 = hfsplus_submit_bio(sb, |
52399b17 | 211 | sbi->part_start + HFSPLUS_VOLHEAD_SECTOR, |
6596528e | 212 | sbi->s_vhdr_buf, NULL, WRITE_SYNC); |
7dc4f001 CH |
213 | if (!error) |
214 | error = error2; | |
52399b17 CH |
215 | if (!write_backup) |
216 | goto out; | |
217 | ||
6596528e | 218 | error2 = hfsplus_submit_bio(sb, |
52399b17 | 219 | sbi->part_start + sbi->sect_count - 2, |
6596528e | 220 | sbi->s_backup_vhdr_buf, NULL, WRITE_SYNC); |
52399b17 CH |
221 | if (!error) |
222 | error2 = error; | |
223 | out: | |
dd73a01a | 224 | mutex_unlock(&sbi->alloc_mutex); |
7ac9fb9c | 225 | mutex_unlock(&sbi->vh_mutex); |
34a2d313 CH |
226 | |
227 | if (!test_bit(HFSPLUS_SB_NOBARRIER, &sbi->flags)) | |
228 | blkdev_issue_flush(sb->s_bdev, GFP_KERNEL, NULL); | |
229 | ||
52399b17 | 230 | return error; |
7fbc6df0 CH |
231 | } |
232 | ||
9e6c5829 | 233 | static void delayed_sync_fs(struct work_struct *work) |
7fbc6df0 | 234 | { |
bffdd661 | 235 | int err; |
9e6c5829 AB |
236 | struct hfsplus_sb_info *sbi; |
237 | ||
238 | sbi = container_of(work, struct hfsplus_sb_info, sync_work.work); | |
239 | ||
240 | spin_lock(&sbi->work_lock); | |
241 | sbi->work_queued = 0; | |
242 | spin_unlock(&sbi->work_lock); | |
243 | ||
bffdd661 VD |
244 | err = hfsplus_sync_fs(sbi->alloc_file->i_sb, 1); |
245 | if (err) | |
246 | printk(KERN_ERR "hfs: delayed sync fs err %d\n", err); | |
9e6c5829 AB |
247 | } |
248 | ||
249 | void hfsplus_mark_mdb_dirty(struct super_block *sb) | |
250 | { | |
251 | struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb); | |
252 | unsigned long delay; | |
253 | ||
254 | if (sb->s_flags & MS_RDONLY) | |
255 | return; | |
256 | ||
257 | spin_lock(&sbi->work_lock); | |
258 | if (!sbi->work_queued) { | |
259 | delay = msecs_to_jiffies(dirty_writeback_interval * 10); | |
260 | queue_delayed_work(system_long_wq, &sbi->sync_work, delay); | |
261 | sbi->work_queued = 1; | |
262 | } | |
263 | spin_unlock(&sbi->work_lock); | |
1da177e4 LT |
264 | } |
265 | ||
266 | static void hfsplus_put_super(struct super_block *sb) | |
267 | { | |
dd73a01a CH |
268 | struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb); |
269 | ||
1da177e4 | 270 | dprint(DBG_SUPER, "hfsplus_put_super\n"); |
dd73a01a | 271 | |
9e6c5829 AB |
272 | cancel_delayed_work_sync(&sbi->sync_work); |
273 | ||
dd73a01a CH |
274 | if (!(sb->s_flags & MS_RDONLY) && sbi->s_vhdr) { |
275 | struct hfsplus_vh *vhdr = sbi->s_vhdr; | |
1da177e4 LT |
276 | |
277 | vhdr->modify_date = hfsp_now2mt(); | |
278 | vhdr->attributes |= cpu_to_be32(HFSPLUS_VOL_UNMNT); | |
279 | vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_INCNSTNT); | |
3b5ce8ae CH |
280 | |
281 | hfsplus_sync_fs(sb, 1); | |
1da177e4 LT |
282 | } |
283 | ||
dd73a01a CH |
284 | hfs_btree_close(sbi->cat_tree); |
285 | hfs_btree_close(sbi->ext_tree); | |
286 | iput(sbi->alloc_file); | |
287 | iput(sbi->hidden_dir); | |
6596528e SF |
288 | kfree(sbi->s_vhdr_buf); |
289 | kfree(sbi->s_backup_vhdr_buf); | |
dd73a01a | 290 | unload_nls(sbi->nls); |
945b0920 CL |
291 | kfree(sb->s_fs_info); |
292 | sb->s_fs_info = NULL; | |
1da177e4 LT |
293 | } |
294 | ||
726c3342 | 295 | static int hfsplus_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 296 | { |
726c3342 | 297 | struct super_block *sb = dentry->d_sb; |
dd73a01a | 298 | struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb); |
25564dd8 | 299 | u64 id = huge_encode_dev(sb->s_bdev->bd_dev); |
726c3342 | 300 | |
1da177e4 LT |
301 | buf->f_type = HFSPLUS_SUPER_MAGIC; |
302 | buf->f_bsize = sb->s_blocksize; | |
dd73a01a CH |
303 | buf->f_blocks = sbi->total_blocks << sbi->fs_shift; |
304 | buf->f_bfree = sbi->free_blocks << sbi->fs_shift; | |
1da177e4 LT |
305 | buf->f_bavail = buf->f_bfree; |
306 | buf->f_files = 0xFFFFFFFF; | |
dd73a01a | 307 | buf->f_ffree = 0xFFFFFFFF - sbi->next_cnid; |
25564dd8 CL |
308 | buf->f_fsid.val[0] = (u32)id; |
309 | buf->f_fsid.val[1] = (u32)(id >> 32); | |
1da177e4 LT |
310 | buf->f_namelen = HFSPLUS_MAX_STRLEN; |
311 | ||
312 | return 0; | |
313 | } | |
314 | ||
315 | static int hfsplus_remount(struct super_block *sb, int *flags, char *data) | |
316 | { | |
317 | if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) | |
318 | return 0; | |
319 | if (!(*flags & MS_RDONLY)) { | |
dd73a01a | 320 | struct hfsplus_vh *vhdr = HFSPLUS_SB(sb)->s_vhdr; |
6f80dfe5 | 321 | int force = 0; |
b0b623c3 | 322 | |
6f80dfe5 | 323 | if (!hfsplus_parse_options_remount(data, &force)) |
b0b623c3 | 324 | return -EINVAL; |
1da177e4 LT |
325 | |
326 | if (!(vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_UNMNT))) { | |
2753cc28 AS |
327 | printk(KERN_WARNING "hfs: filesystem was " |
328 | "not cleanly unmounted, " | |
329 | "running fsck.hfsplus is recommended. " | |
330 | "leaving read-only.\n"); | |
1da177e4 LT |
331 | sb->s_flags |= MS_RDONLY; |
332 | *flags |= MS_RDONLY; | |
6f80dfe5 | 333 | } else if (force) { |
b0b623c3 | 334 | /* nothing */ |
2753cc28 AS |
335 | } else if (vhdr->attributes & |
336 | cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) { | |
337 | printk(KERN_WARNING "hfs: filesystem is marked locked, " | |
338 | "leaving read-only.\n"); | |
1da177e4 LT |
339 | sb->s_flags |= MS_RDONLY; |
340 | *flags |= MS_RDONLY; | |
2753cc28 AS |
341 | } else if (vhdr->attributes & |
342 | cpu_to_be32(HFSPLUS_VOL_JOURNALED)) { | |
343 | printk(KERN_WARNING "hfs: filesystem is " | |
344 | "marked journaled, " | |
345 | "leaving read-only.\n"); | |
b0b623c3 RZ |
346 | sb->s_flags |= MS_RDONLY; |
347 | *flags |= MS_RDONLY; | |
1da177e4 LT |
348 | } |
349 | } | |
350 | return 0; | |
351 | } | |
352 | ||
ee9b6d61 | 353 | static const struct super_operations hfsplus_sops = { |
1da177e4 LT |
354 | .alloc_inode = hfsplus_alloc_inode, |
355 | .destroy_inode = hfsplus_destroy_inode, | |
1da177e4 | 356 | .write_inode = hfsplus_write_inode, |
b57922d9 | 357 | .evict_inode = hfsplus_evict_inode, |
1da177e4 | 358 | .put_super = hfsplus_put_super, |
7fbc6df0 | 359 | .sync_fs = hfsplus_sync_fs, |
1da177e4 LT |
360 | .statfs = hfsplus_statfs, |
361 | .remount_fs = hfsplus_remount, | |
717dd80e | 362 | .show_options = hfsplus_show_options, |
1da177e4 LT |
363 | }; |
364 | ||
365 | static int hfsplus_fill_super(struct super_block *sb, void *data, int silent) | |
366 | { | |
367 | struct hfsplus_vh *vhdr; | |
368 | struct hfsplus_sb_info *sbi; | |
369 | hfsplus_cat_entry entry; | |
370 | struct hfs_find_data fd; | |
63525391 | 371 | struct inode *root, *inode; |
1da177e4 LT |
372 | struct qstr str; |
373 | struct nls_table *nls = NULL; | |
f1fcd9f0 | 374 | u64 last_fs_block, last_fs_page; |
c5b8d0bc | 375 | int err; |
1da177e4 | 376 | |
497d48bd | 377 | err = -ENOMEM; |
a5001a27 | 378 | sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); |
1da177e4 | 379 | if (!sbi) |
c5b8d0bc | 380 | goto out; |
1da177e4 | 381 | |
1da177e4 | 382 | sb->s_fs_info = sbi; |
40bf48af | 383 | mutex_init(&sbi->alloc_mutex); |
7ac9fb9c | 384 | mutex_init(&sbi->vh_mutex); |
9e6c5829 AB |
385 | spin_lock_init(&sbi->work_lock); |
386 | INIT_DELAYED_WORK(&sbi->sync_work, delayed_sync_fs); | |
717dd80e | 387 | hfsplus_fill_defaults(sbi); |
c5b8d0bc CH |
388 | |
389 | err = -EINVAL; | |
717dd80e | 390 | if (!hfsplus_parse_options(data, sbi)) { |
634725a9 | 391 | printk(KERN_ERR "hfs: unable to parse mount options\n"); |
c5b8d0bc | 392 | goto out_unload_nls; |
1da177e4 LT |
393 | } |
394 | ||
395 | /* temporarily use utf8 to correctly find the hidden dir below */ | |
396 | nls = sbi->nls; | |
397 | sbi->nls = load_nls("utf8"); | |
bd6a59b2 | 398 | if (!sbi->nls) { |
634725a9 | 399 | printk(KERN_ERR "hfs: unable to load nls for utf8\n"); |
c5b8d0bc | 400 | goto out_unload_nls; |
1da177e4 LT |
401 | } |
402 | ||
403 | /* Grab the volume header */ | |
404 | if (hfsplus_read_wrapper(sb)) { | |
405 | if (!silent) | |
634725a9 | 406 | printk(KERN_WARNING "hfs: unable to find HFS+ superblock\n"); |
c5b8d0bc | 407 | goto out_unload_nls; |
1da177e4 | 408 | } |
dd73a01a | 409 | vhdr = sbi->s_vhdr; |
1da177e4 LT |
410 | |
411 | /* Copy parts of the volume header into the superblock */ | |
2179d372 DE |
412 | sb->s_magic = HFSPLUS_VOLHEAD_SIG; |
413 | if (be16_to_cpu(vhdr->version) < HFSPLUS_MIN_VERSION || | |
414 | be16_to_cpu(vhdr->version) > HFSPLUS_CURRENT_VERSION) { | |
634725a9 | 415 | printk(KERN_ERR "hfs: wrong filesystem version\n"); |
c5b8d0bc | 416 | goto out_free_vhdr; |
1da177e4 | 417 | } |
dd73a01a CH |
418 | sbi->total_blocks = be32_to_cpu(vhdr->total_blocks); |
419 | sbi->free_blocks = be32_to_cpu(vhdr->free_blocks); | |
dd73a01a CH |
420 | sbi->next_cnid = be32_to_cpu(vhdr->next_cnid); |
421 | sbi->file_count = be32_to_cpu(vhdr->file_count); | |
422 | sbi->folder_count = be32_to_cpu(vhdr->folder_count); | |
423 | sbi->data_clump_blocks = | |
424 | be32_to_cpu(vhdr->data_clump_sz) >> sbi->alloc_blksz_shift; | |
425 | if (!sbi->data_clump_blocks) | |
426 | sbi->data_clump_blocks = 1; | |
427 | sbi->rsrc_clump_blocks = | |
428 | be32_to_cpu(vhdr->rsrc_clump_sz) >> sbi->alloc_blksz_shift; | |
429 | if (!sbi->rsrc_clump_blocks) | |
430 | sbi->rsrc_clump_blocks = 1; | |
1da177e4 | 431 | |
f1fcd9f0 CH |
432 | err = -EFBIG; |
433 | last_fs_block = sbi->total_blocks - 1; | |
434 | last_fs_page = (last_fs_block << sbi->alloc_blksz_shift) >> | |
435 | PAGE_CACHE_SHIFT; | |
436 | ||
437 | if ((last_fs_block > (sector_t)(~0ULL) >> (sbi->alloc_blksz_shift - 9)) || | |
438 | (last_fs_page > (pgoff_t)(~0ULL))) { | |
c6d5f5fa CH |
439 | printk(KERN_ERR "hfs: filesystem size too large.\n"); |
440 | goto out_free_vhdr; | |
441 | } | |
442 | ||
1da177e4 LT |
443 | /* Set up operations so we can load metadata */ |
444 | sb->s_op = &hfsplus_sops; | |
445 | sb->s_maxbytes = MAX_LFS_FILESIZE; | |
446 | ||
447 | if (!(vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_UNMNT))) { | |
2753cc28 AS |
448 | printk(KERN_WARNING "hfs: Filesystem was " |
449 | "not cleanly unmounted, " | |
450 | "running fsck.hfsplus is recommended. " | |
451 | "mounting read-only.\n"); | |
1da177e4 | 452 | sb->s_flags |= MS_RDONLY; |
84adede3 | 453 | } else if (test_and_clear_bit(HFSPLUS_SB_FORCE, &sbi->flags)) { |
b0b623c3 | 454 | /* nothing */ |
1da177e4 | 455 | } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) { |
634725a9 | 456 | printk(KERN_WARNING "hfs: Filesystem is marked locked, mounting read-only.\n"); |
1da177e4 | 457 | sb->s_flags |= MS_RDONLY; |
2753cc28 AS |
458 | } else if ((vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_JOURNALED)) && |
459 | !(sb->s_flags & MS_RDONLY)) { | |
460 | printk(KERN_WARNING "hfs: write access to " | |
461 | "a journaled filesystem is not supported, " | |
462 | "use the force option at your own risk, " | |
463 | "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) { | |
634725a9 | 472 | printk(KERN_ERR "hfs: 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) { | |
634725a9 | 477 | printk(KERN_ERR "hfs: failed to load catalog file\n"); |
c5b8d0bc | 478 | goto out_close_ext_tree; |
1da177e4 LT |
479 | } |
480 | ||
63525391 DH |
481 | inode = hfsplus_iget(sb, HFSPLUS_ALLOC_CNID); |
482 | if (IS_ERR(inode)) { | |
634725a9 | 483 | printk(KERN_ERR "hfs: failed to load allocation file\n"); |
63525391 | 484 | err = PTR_ERR(inode); |
c5b8d0bc | 485 | goto out_close_cat_tree; |
1da177e4 | 486 | } |
dd73a01a | 487 | sbi->alloc_file = inode; |
1da177e4 LT |
488 | |
489 | /* Load the root directory */ | |
63525391 DH |
490 | root = hfsplus_iget(sb, HFSPLUS_ROOT_CNID); |
491 | if (IS_ERR(root)) { | |
492 | printk(KERN_ERR "hfs: failed to load root directory\n"); | |
493 | err = PTR_ERR(root); | |
c5b8d0bc | 494 | goto out_put_alloc_file; |
1da177e4 LT |
495 | } |
496 | ||
68acb8e6 AV |
497 | sb->s_d_op = &hfsplus_dentry_operations; |
498 | sb->s_root = d_make_root(root); | |
499 | if (!sb->s_root) { | |
500 | err = -ENOMEM; | |
501 | goto out_put_alloc_file; | |
502 | } | |
503 | ||
1da177e4 LT |
504 | str.len = sizeof(HFSP_HIDDENDIR_NAME) - 1; |
505 | str.name = HFSP_HIDDENDIR_NAME; | |
5bd9d99d AK |
506 | err = hfs_find_init(sbi->cat_tree, &fd); |
507 | if (err) | |
508 | goto out_put_root; | |
1da177e4 LT |
509 | hfsplus_cat_build_key(sb, fd.search_key, HFSPLUS_ROOT_CNID, &str); |
510 | if (!hfs_brec_read(&fd, &entry, sizeof(entry))) { | |
511 | hfs_find_exit(&fd); | |
512 | if (entry.type != cpu_to_be16(HFSPLUS_FOLDER)) | |
c5b8d0bc | 513 | goto out_put_root; |
63525391 DH |
514 | inode = hfsplus_iget(sb, be32_to_cpu(entry.folder.id)); |
515 | if (IS_ERR(inode)) { | |
516 | err = PTR_ERR(inode); | |
c5b8d0bc | 517 | goto out_put_root; |
63525391 | 518 | } |
dd73a01a | 519 | sbi->hidden_dir = inode; |
1da177e4 LT |
520 | } else |
521 | hfs_find_exit(&fd); | |
522 | ||
c5b8d0bc CH |
523 | if (!(sb->s_flags & MS_RDONLY)) { |
524 | /* | |
525 | * H+LX == hfsplusutils, H+Lx == this driver, H+lx is unused | |
526 | * all three are registered with Apple for our use | |
527 | */ | |
528 | vhdr->last_mount_vers = cpu_to_be32(HFSP_MOUNT_VERSION); | |
529 | vhdr->modify_date = hfsp_now2mt(); | |
530 | be32_add_cpu(&vhdr->write_count, 1); | |
531 | vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_UNMNT); | |
532 | vhdr->attributes |= cpu_to_be32(HFSPLUS_VOL_INCNSTNT); | |
533 | hfsplus_sync_fs(sb, 1); | |
1da177e4 | 534 | |
c5b8d0bc CH |
535 | if (!sbi->hidden_dir) { |
536 | mutex_lock(&sbi->vh_mutex); | |
537 | sbi->hidden_dir = hfsplus_new_inode(sb, S_IFDIR); | |
b3f2a924 AV |
538 | if (!sbi->hidden_dir) { |
539 | mutex_unlock(&sbi->vh_mutex); | |
540 | err = -ENOMEM; | |
541 | goto out_put_root; | |
542 | } | |
543 | err = hfsplus_create_cat(sbi->hidden_dir->i_ino, root, | |
544 | &str, sbi->hidden_dir); | |
c5b8d0bc | 545 | mutex_unlock(&sbi->vh_mutex); |
b3f2a924 AV |
546 | if (err) |
547 | goto out_put_hidden_dir; | |
c5b8d0bc CH |
548 | |
549 | hfsplus_mark_inode_dirty(sbi->hidden_dir, | |
550 | HFSPLUS_I_CAT_DIRTY); | |
551 | } | |
1da177e4 | 552 | } |
c5b8d0bc | 553 | |
1da177e4 LT |
554 | unload_nls(sbi->nls); |
555 | sbi->nls = nls; | |
556 | return 0; | |
557 | ||
c5b8d0bc CH |
558 | out_put_hidden_dir: |
559 | iput(sbi->hidden_dir); | |
560 | out_put_root: | |
68acb8e6 AV |
561 | dput(sb->s_root); |
562 | sb->s_root = NULL; | |
c5b8d0bc CH |
563 | out_put_alloc_file: |
564 | iput(sbi->alloc_file); | |
565 | out_close_cat_tree: | |
566 | hfs_btree_close(sbi->cat_tree); | |
567 | out_close_ext_tree: | |
568 | hfs_btree_close(sbi->ext_tree); | |
569 | out_free_vhdr: | |
f588c960 SF |
570 | kfree(sbi->s_vhdr_buf); |
571 | kfree(sbi->s_backup_vhdr_buf); | |
c5b8d0bc CH |
572 | out_unload_nls: |
573 | unload_nls(sbi->nls); | |
6d729e44 | 574 | unload_nls(nls); |
c5b8d0bc CH |
575 | kfree(sbi); |
576 | out: | |
1da177e4 LT |
577 | return err; |
578 | } | |
579 | ||
580 | MODULE_AUTHOR("Brad Boyer"); | |
581 | MODULE_DESCRIPTION("Extended Macintosh Filesystem"); | |
582 | MODULE_LICENSE("GPL"); | |
583 | ||
e18b890b | 584 | static struct kmem_cache *hfsplus_inode_cachep; |
1da177e4 LT |
585 | |
586 | static struct inode *hfsplus_alloc_inode(struct super_block *sb) | |
587 | { | |
588 | struct hfsplus_inode_info *i; | |
589 | ||
e94b1766 | 590 | i = kmem_cache_alloc(hfsplus_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
591 | return i ? &i->vfs_inode : NULL; |
592 | } | |
593 | ||
fa0d7e3d | 594 | static void hfsplus_i_callback(struct rcu_head *head) |
1da177e4 | 595 | { |
fa0d7e3d NP |
596 | struct inode *inode = container_of(head, struct inode, i_rcu); |
597 | ||
6af502de | 598 | kmem_cache_free(hfsplus_inode_cachep, HFSPLUS_I(inode)); |
1da177e4 LT |
599 | } |
600 | ||
fa0d7e3d NP |
601 | static void hfsplus_destroy_inode(struct inode *inode) |
602 | { | |
603 | call_rcu(&inode->i_rcu, hfsplus_i_callback); | |
604 | } | |
605 | ||
1da177e4 LT |
606 | #define HFSPLUS_INODE_SIZE sizeof(struct hfsplus_inode_info) |
607 | ||
152a0836 AV |
608 | static struct dentry *hfsplus_mount(struct file_system_type *fs_type, |
609 | int flags, const char *dev_name, void *data) | |
1da177e4 | 610 | { |
152a0836 | 611 | return mount_bdev(fs_type, flags, dev_name, data, hfsplus_fill_super); |
1da177e4 LT |
612 | } |
613 | ||
614 | static struct file_system_type hfsplus_fs_type = { | |
615 | .owner = THIS_MODULE, | |
616 | .name = "hfsplus", | |
152a0836 | 617 | .mount = hfsplus_mount, |
1da177e4 LT |
618 | .kill_sb = kill_block_super, |
619 | .fs_flags = FS_REQUIRES_DEV, | |
620 | }; | |
621 | ||
51cc5068 | 622 | static void hfsplus_init_once(void *p) |
1da177e4 LT |
623 | { |
624 | struct hfsplus_inode_info *i = p; | |
625 | ||
a35afb83 | 626 | inode_init_once(&i->vfs_inode); |
1da177e4 LT |
627 | } |
628 | ||
629 | static int __init init_hfsplus_fs(void) | |
630 | { | |
631 | int err; | |
632 | ||
633 | hfsplus_inode_cachep = kmem_cache_create("hfsplus_icache", | |
634 | HFSPLUS_INODE_SIZE, 0, SLAB_HWCACHE_ALIGN, | |
20c2df83 | 635 | hfsplus_init_once); |
1da177e4 LT |
636 | if (!hfsplus_inode_cachep) |
637 | return -ENOMEM; | |
638 | err = register_filesystem(&hfsplus_fs_type); | |
639 | if (err) | |
640 | kmem_cache_destroy(hfsplus_inode_cachep); | |
641 | return err; | |
642 | } | |
643 | ||
644 | static void __exit exit_hfsplus_fs(void) | |
645 | { | |
646 | unregister_filesystem(&hfsplus_fs_type); | |
8c0a8537 KS |
647 | |
648 | /* | |
649 | * Make sure all delayed rcu free inodes are flushed before we | |
650 | * destroy cache. | |
651 | */ | |
652 | rcu_barrier(); | |
1a1d92c1 | 653 | kmem_cache_destroy(hfsplus_inode_cachep); |
1da177e4 LT |
654 | } |
655 | ||
656 | module_init(init_hfsplus_fs) | |
657 | module_exit(exit_hfsplus_fs) |