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