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