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Commit | Line | Data |
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09c434b8 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
1da177e4 LT |
2 | /* |
3 | * linux/fs/hfsplus/super.c | |
4 | * | |
5 | * Copyright (C) 2001 | |
6 | * Brad Boyer (flar@allandria.com) | |
7 | * (C) 2003 Ardis Technologies <roman@ardistech.com> | |
8 | * | |
9 | */ | |
10 | ||
1da177e4 LT |
11 | #include <linux/module.h> |
12 | #include <linux/init.h> | |
13 | #include <linux/pagemap.h> | |
34a2d313 | 14 | #include <linux/blkdev.h> |
66114cad | 15 | #include <linux/backing-dev.h> |
1da177e4 | 16 | #include <linux/fs.h> |
1da177e4 | 17 | #include <linux/slab.h> |
1da177e4 LT |
18 | #include <linux/vfs.h> |
19 | #include <linux/nls.h> | |
20 | ||
21 | static struct inode *hfsplus_alloc_inode(struct super_block *sb); | |
08ab2293 | 22 | static void hfsplus_free_inode(struct inode *inode); |
1da177e4 LT |
23 | |
24 | #include "hfsplus_fs.h" | |
324ef39a | 25 | #include "xattr.h" |
1da177e4 | 26 | |
fc4fff82 CH |
27 | static int hfsplus_system_read_inode(struct inode *inode) |
28 | { | |
29 | struct hfsplus_vh *vhdr = HFSPLUS_SB(inode->i_sb)->s_vhdr; | |
30 | ||
31 | switch (inode->i_ino) { | |
32 | case HFSPLUS_EXT_CNID: | |
33 | hfsplus_inode_read_fork(inode, &vhdr->ext_file); | |
34 | inode->i_mapping->a_ops = &hfsplus_btree_aops; | |
35 | break; | |
36 | case HFSPLUS_CAT_CNID: | |
37 | hfsplus_inode_read_fork(inode, &vhdr->cat_file); | |
38 | inode->i_mapping->a_ops = &hfsplus_btree_aops; | |
39 | break; | |
40 | case HFSPLUS_ALLOC_CNID: | |
41 | hfsplus_inode_read_fork(inode, &vhdr->alloc_file); | |
42 | inode->i_mapping->a_ops = &hfsplus_aops; | |
43 | break; | |
44 | case HFSPLUS_START_CNID: | |
45 | hfsplus_inode_read_fork(inode, &vhdr->start_file); | |
46 | break; | |
47 | case HFSPLUS_ATTR_CNID: | |
48 | hfsplus_inode_read_fork(inode, &vhdr->attr_file); | |
49 | inode->i_mapping->a_ops = &hfsplus_btree_aops; | |
50 | break; | |
51 | default: | |
52 | return -EIO; | |
53 | } | |
54 | ||
55 | return 0; | |
56 | } | |
57 | ||
63525391 | 58 | struct inode *hfsplus_iget(struct super_block *sb, unsigned long ino) |
1da177e4 LT |
59 | { |
60 | struct hfs_find_data fd; | |
63525391 | 61 | struct inode *inode; |
fc4fff82 | 62 | int err; |
63525391 DH |
63 | |
64 | inode = iget_locked(sb, ino); | |
65 | if (!inode) | |
66 | return ERR_PTR(-ENOMEM); | |
67 | if (!(inode->i_state & I_NEW)) | |
68 | return inode; | |
1da177e4 | 69 | |
6af502de | 70 | INIT_LIST_HEAD(&HFSPLUS_I(inode)->open_dir_list); |
323ee8fc | 71 | spin_lock_init(&HFSPLUS_I(inode)->open_dir_lock); |
6af502de CH |
72 | mutex_init(&HFSPLUS_I(inode)->extents_lock); |
73 | HFSPLUS_I(inode)->flags = 0; | |
b33b7921 | 74 | HFSPLUS_I(inode)->extent_state = 0; |
6af502de CH |
75 | HFSPLUS_I(inode)->rsrc_inode = NULL; |
76 | atomic_set(&HFSPLUS_I(inode)->opencnt, 0); | |
1da177e4 | 77 | |
fc4fff82 CH |
78 | if (inode->i_ino >= HFSPLUS_FIRSTUSER_CNID || |
79 | inode->i_ino == HFSPLUS_ROOT_CNID) { | |
5bd9d99d AK |
80 | err = hfs_find_init(HFSPLUS_SB(inode->i_sb)->cat_tree, &fd); |
81 | if (!err) { | |
82 | err = hfsplus_find_cat(inode->i_sb, inode->i_ino, &fd); | |
83 | if (!err) | |
84 | err = hfsplus_cat_read_inode(inode, &fd); | |
85 | hfs_find_exit(&fd); | |
86 | } | |
fc4fff82 CH |
87 | } else { |
88 | err = hfsplus_system_read_inode(inode); | |
1da177e4 | 89 | } |
fc4fff82 CH |
90 | |
91 | if (err) { | |
92 | iget_failed(inode); | |
93 | return ERR_PTR(err); | |
1da177e4 LT |
94 | } |
95 | ||
63525391 DH |
96 | unlock_new_inode(inode); |
97 | return inode; | |
1da177e4 LT |
98 | } |
99 | ||
b5080f77 | 100 | static int hfsplus_system_write_inode(struct inode *inode) |
1da177e4 | 101 | { |
dd73a01a | 102 | struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb); |
b5080f77 CH |
103 | struct hfsplus_vh *vhdr = sbi->s_vhdr; |
104 | struct hfsplus_fork_raw *fork; | |
105 | struct hfs_btree *tree = NULL; | |
1da177e4 | 106 | |
1da177e4 | 107 | switch (inode->i_ino) { |
1da177e4 | 108 | case HFSPLUS_EXT_CNID: |
b5080f77 CH |
109 | fork = &vhdr->ext_file; |
110 | tree = sbi->ext_tree; | |
1da177e4 LT |
111 | break; |
112 | case HFSPLUS_CAT_CNID: | |
b5080f77 CH |
113 | fork = &vhdr->cat_file; |
114 | tree = sbi->cat_tree; | |
1da177e4 LT |
115 | break; |
116 | case HFSPLUS_ALLOC_CNID: | |
b5080f77 | 117 | fork = &vhdr->alloc_file; |
1da177e4 LT |
118 | break; |
119 | case HFSPLUS_START_CNID: | |
b5080f77 | 120 | fork = &vhdr->start_file; |
1da177e4 LT |
121 | break; |
122 | case HFSPLUS_ATTR_CNID: | |
b5080f77 CH |
123 | fork = &vhdr->attr_file; |
124 | tree = sbi->attr_tree; | |
324ef39a | 125 | break; |
b5080f77 CH |
126 | default: |
127 | return -EIO; | |
128 | } | |
129 | ||
130 | if (fork->total_size != cpu_to_be64(inode->i_size)) { | |
84adede3 | 131 | set_bit(HFSPLUS_SB_WRITEBACKUP, &sbi->flags); |
9e6c5829 | 132 | hfsplus_mark_mdb_dirty(inode->i_sb); |
1da177e4 | 133 | } |
b5080f77 | 134 | hfsplus_inode_write_fork(inode, fork); |
81cc7fad VD |
135 | if (tree) { |
136 | int err = hfs_btree_write(tree); | |
b73f3d0e | 137 | |
81cc7fad | 138 | if (err) { |
d6142673 | 139 | pr_err("b-tree write err: %d, ino %lu\n", |
b73f3d0e | 140 | err, inode->i_ino); |
81cc7fad VD |
141 | return err; |
142 | } | |
143 | } | |
b5080f77 CH |
144 | return 0; |
145 | } | |
146 | ||
147 | static int hfsplus_write_inode(struct inode *inode, | |
148 | struct writeback_control *wbc) | |
149 | { | |
dd7f3d54 AK |
150 | int err; |
151 | ||
c2b3e1f7 | 152 | hfs_dbg(INODE, "hfsplus_write_inode: %lu\n", inode->i_ino); |
b5080f77 | 153 | |
dd7f3d54 AK |
154 | err = hfsplus_ext_write_extent(inode); |
155 | if (err) | |
156 | return err; | |
b5080f77 CH |
157 | |
158 | if (inode->i_ino >= HFSPLUS_FIRSTUSER_CNID || | |
159 | inode->i_ino == HFSPLUS_ROOT_CNID) | |
160 | return hfsplus_cat_write_inode(inode); | |
161 | else | |
162 | return hfsplus_system_write_inode(inode); | |
1da177e4 LT |
163 | } |
164 | ||
b57922d9 | 165 | static void hfsplus_evict_inode(struct inode *inode) |
1da177e4 | 166 | { |
c2b3e1f7 | 167 | hfs_dbg(INODE, "hfsplus_evict_inode: %lu\n", inode->i_ino); |
91b0abe3 | 168 | truncate_inode_pages_final(&inode->i_data); |
dbd5768f | 169 | clear_inode(inode); |
1da177e4 | 170 | if (HFSPLUS_IS_RSRC(inode)) { |
6af502de CH |
171 | HFSPLUS_I(HFSPLUS_I(inode)->rsrc_inode)->rsrc_inode = NULL; |
172 | iput(HFSPLUS_I(inode)->rsrc_inode); | |
1da177e4 | 173 | } |
1da177e4 LT |
174 | } |
175 | ||
0a818619 | 176 | static int hfsplus_sync_fs(struct super_block *sb, int wait) |
1da177e4 | 177 | { |
dd73a01a CH |
178 | struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb); |
179 | struct hfsplus_vh *vhdr = sbi->s_vhdr; | |
52399b17 CH |
180 | int write_backup = 0; |
181 | int error, error2; | |
1da177e4 | 182 | |
f02e26f8 CH |
183 | if (!wait) |
184 | return 0; | |
1da177e4 | 185 | |
c2b3e1f7 | 186 | hfs_dbg(SUPER, "hfsplus_sync_fs\n"); |
ebc1ac16 | 187 | |
7dc4f001 CH |
188 | /* |
189 | * Explicitly write out the special metadata inodes. | |
190 | * | |
191 | * While these special inodes are marked as hashed and written | |
192 | * out peridocically by the flusher threads we redirty them | |
193 | * during writeout of normal inodes, and thus the life lock | |
194 | * prevents us from getting the latest state to disk. | |
195 | */ | |
196 | error = filemap_write_and_wait(sbi->cat_tree->inode->i_mapping); | |
197 | error2 = filemap_write_and_wait(sbi->ext_tree->inode->i_mapping); | |
198 | if (!error) | |
199 | error = error2; | |
324ef39a VD |
200 | if (sbi->attr_tree) { |
201 | error2 = | |
202 | filemap_write_and_wait(sbi->attr_tree->inode->i_mapping); | |
203 | if (!error) | |
204 | error = error2; | |
205 | } | |
7dc4f001 CH |
206 | error2 = filemap_write_and_wait(sbi->alloc_file->i_mapping); |
207 | if (!error) | |
208 | error = error2; | |
209 | ||
52399b17 CH |
210 | mutex_lock(&sbi->vh_mutex); |
211 | mutex_lock(&sbi->alloc_mutex); | |
dd73a01a | 212 | vhdr->free_blocks = cpu_to_be32(sbi->free_blocks); |
dd73a01a CH |
213 | vhdr->next_cnid = cpu_to_be32(sbi->next_cnid); |
214 | vhdr->folder_count = cpu_to_be32(sbi->folder_count); | |
215 | vhdr->file_count = cpu_to_be32(sbi->file_count); | |
1da177e4 | 216 | |
84adede3 | 217 | if (test_and_clear_bit(HFSPLUS_SB_WRITEBACKUP, &sbi->flags)) { |
52399b17 CH |
218 | memcpy(sbi->s_backup_vhdr, sbi->s_vhdr, sizeof(*sbi->s_vhdr)); |
219 | write_backup = 1; | |
1da177e4 | 220 | } |
52399b17 | 221 | |
6596528e | 222 | error2 = hfsplus_submit_bio(sb, |
52399b17 | 223 | sbi->part_start + HFSPLUS_VOLHEAD_SECTOR, |
67ed2596 | 224 | sbi->s_vhdr_buf, NULL, REQ_OP_WRITE, |
70fd7614 | 225 | REQ_SYNC); |
7dc4f001 CH |
226 | if (!error) |
227 | error = error2; | |
52399b17 CH |
228 | if (!write_backup) |
229 | goto out; | |
230 | ||
6596528e | 231 | error2 = hfsplus_submit_bio(sb, |
52399b17 | 232 | sbi->part_start + sbi->sect_count - 2, |
67ed2596 | 233 | sbi->s_backup_vhdr_buf, NULL, REQ_OP_WRITE, |
70fd7614 | 234 | REQ_SYNC); |
52399b17 CH |
235 | if (!error) |
236 | error2 = error; | |
237 | out: | |
dd73a01a | 238 | mutex_unlock(&sbi->alloc_mutex); |
7ac9fb9c | 239 | mutex_unlock(&sbi->vh_mutex); |
34a2d313 CH |
240 | |
241 | if (!test_bit(HFSPLUS_SB_NOBARRIER, &sbi->flags)) | |
9398554f | 242 | blkdev_issue_flush(sb->s_bdev, GFP_KERNEL); |
34a2d313 | 243 | |
52399b17 | 244 | return error; |
7fbc6df0 CH |
245 | } |
246 | ||
9e6c5829 | 247 | static void delayed_sync_fs(struct work_struct *work) |
7fbc6df0 | 248 | { |
bffdd661 | 249 | int err; |
9e6c5829 AB |
250 | struct hfsplus_sb_info *sbi; |
251 | ||
252 | sbi = container_of(work, struct hfsplus_sb_info, sync_work.work); | |
253 | ||
254 | spin_lock(&sbi->work_lock); | |
255 | sbi->work_queued = 0; | |
256 | spin_unlock(&sbi->work_lock); | |
257 | ||
bffdd661 VD |
258 | err = hfsplus_sync_fs(sbi->alloc_file->i_sb, 1); |
259 | if (err) | |
d6142673 | 260 | pr_err("delayed sync fs err %d\n", err); |
9e6c5829 AB |
261 | } |
262 | ||
263 | void hfsplus_mark_mdb_dirty(struct super_block *sb) | |
264 | { | |
265 | struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb); | |
266 | unsigned long delay; | |
267 | ||
bc98a42c | 268 | if (sb_rdonly(sb)) |
9e6c5829 AB |
269 | return; |
270 | ||
271 | spin_lock(&sbi->work_lock); | |
272 | if (!sbi->work_queued) { | |
273 | delay = msecs_to_jiffies(dirty_writeback_interval * 10); | |
274 | queue_delayed_work(system_long_wq, &sbi->sync_work, delay); | |
275 | sbi->work_queued = 1; | |
276 | } | |
277 | spin_unlock(&sbi->work_lock); | |
1da177e4 LT |
278 | } |
279 | ||
280 | static void hfsplus_put_super(struct super_block *sb) | |
281 | { | |
dd73a01a CH |
282 | struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb); |
283 | ||
c2b3e1f7 | 284 | hfs_dbg(SUPER, "hfsplus_put_super\n"); |
dd73a01a | 285 | |
9e6c5829 AB |
286 | cancel_delayed_work_sync(&sbi->sync_work); |
287 | ||
bc98a42c | 288 | if (!sb_rdonly(sb) && sbi->s_vhdr) { |
dd73a01a | 289 | struct hfsplus_vh *vhdr = sbi->s_vhdr; |
1da177e4 LT |
290 | |
291 | vhdr->modify_date = hfsp_now2mt(); | |
292 | vhdr->attributes |= cpu_to_be32(HFSPLUS_VOL_UNMNT); | |
293 | vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_INCNSTNT); | |
3b5ce8ae CH |
294 | |
295 | hfsplus_sync_fs(sb, 1); | |
1da177e4 LT |
296 | } |
297 | ||
324ef39a | 298 | hfs_btree_close(sbi->attr_tree); |
dd73a01a CH |
299 | hfs_btree_close(sbi->cat_tree); |
300 | hfs_btree_close(sbi->ext_tree); | |
301 | iput(sbi->alloc_file); | |
302 | iput(sbi->hidden_dir); | |
6596528e SF |
303 | kfree(sbi->s_vhdr_buf); |
304 | kfree(sbi->s_backup_vhdr_buf); | |
dd73a01a | 305 | unload_nls(sbi->nls); |
945b0920 CL |
306 | kfree(sb->s_fs_info); |
307 | sb->s_fs_info = NULL; | |
1da177e4 LT |
308 | } |
309 | ||
726c3342 | 310 | static int hfsplus_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 311 | { |
726c3342 | 312 | struct super_block *sb = dentry->d_sb; |
dd73a01a | 313 | struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb); |
25564dd8 | 314 | u64 id = huge_encode_dev(sb->s_bdev->bd_dev); |
726c3342 | 315 | |
1da177e4 LT |
316 | buf->f_type = HFSPLUS_SUPER_MAGIC; |
317 | buf->f_bsize = sb->s_blocksize; | |
dd73a01a CH |
318 | buf->f_blocks = sbi->total_blocks << sbi->fs_shift; |
319 | buf->f_bfree = sbi->free_blocks << sbi->fs_shift; | |
1da177e4 LT |
320 | buf->f_bavail = buf->f_bfree; |
321 | buf->f_files = 0xFFFFFFFF; | |
dd73a01a | 322 | buf->f_ffree = 0xFFFFFFFF - sbi->next_cnid; |
6d1349c7 | 323 | buf->f_fsid = u64_to_fsid(id); |
1da177e4 LT |
324 | buf->f_namelen = HFSPLUS_MAX_STRLEN; |
325 | ||
326 | return 0; | |
327 | } | |
328 | ||
329 | static int hfsplus_remount(struct super_block *sb, int *flags, char *data) | |
330 | { | |
02b9984d | 331 | sync_filesystem(sb); |
1751e8a6 | 332 | if ((bool)(*flags & SB_RDONLY) == sb_rdonly(sb)) |
1da177e4 | 333 | return 0; |
1751e8a6 | 334 | if (!(*flags & SB_RDONLY)) { |
dd73a01a | 335 | struct hfsplus_vh *vhdr = HFSPLUS_SB(sb)->s_vhdr; |
6f80dfe5 | 336 | int force = 0; |
b0b623c3 | 337 | |
6f80dfe5 | 338 | if (!hfsplus_parse_options_remount(data, &force)) |
b0b623c3 | 339 | return -EINVAL; |
1da177e4 LT |
340 | |
341 | if (!(vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_UNMNT))) { | |
d6142673 | 342 | pr_warn("filesystem was not cleanly unmounted, running fsck.hfsplus is recommended. leaving read-only.\n"); |
1751e8a6 LT |
343 | sb->s_flags |= SB_RDONLY; |
344 | *flags |= SB_RDONLY; | |
6f80dfe5 | 345 | } else if (force) { |
b0b623c3 | 346 | /* nothing */ |
2753cc28 AS |
347 | } else if (vhdr->attributes & |
348 | cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) { | |
d6142673 | 349 | pr_warn("filesystem is marked locked, leaving read-only.\n"); |
1751e8a6 LT |
350 | sb->s_flags |= SB_RDONLY; |
351 | *flags |= SB_RDONLY; | |
2753cc28 AS |
352 | } else if (vhdr->attributes & |
353 | cpu_to_be32(HFSPLUS_VOL_JOURNALED)) { | |
d6142673 | 354 | pr_warn("filesystem is marked journaled, leaving read-only.\n"); |
1751e8a6 LT |
355 | sb->s_flags |= SB_RDONLY; |
356 | *flags |= SB_RDONLY; | |
1da177e4 LT |
357 | } |
358 | } | |
359 | return 0; | |
360 | } | |
361 | ||
ee9b6d61 | 362 | static const struct super_operations hfsplus_sops = { |
1da177e4 | 363 | .alloc_inode = hfsplus_alloc_inode, |
08ab2293 | 364 | .free_inode = hfsplus_free_inode, |
1da177e4 | 365 | .write_inode = hfsplus_write_inode, |
b57922d9 | 366 | .evict_inode = hfsplus_evict_inode, |
1da177e4 | 367 | .put_super = hfsplus_put_super, |
7fbc6df0 | 368 | .sync_fs = hfsplus_sync_fs, |
1da177e4 LT |
369 | .statfs = hfsplus_statfs, |
370 | .remount_fs = hfsplus_remount, | |
717dd80e | 371 | .show_options = hfsplus_show_options, |
1da177e4 LT |
372 | }; |
373 | ||
374 | static int hfsplus_fill_super(struct super_block *sb, void *data, int silent) | |
375 | { | |
376 | struct hfsplus_vh *vhdr; | |
377 | struct hfsplus_sb_info *sbi; | |
378 | hfsplus_cat_entry entry; | |
379 | struct hfs_find_data fd; | |
63525391 | 380 | struct inode *root, *inode; |
1da177e4 LT |
381 | struct qstr str; |
382 | struct nls_table *nls = NULL; | |
f1fcd9f0 | 383 | u64 last_fs_block, last_fs_page; |
c5b8d0bc | 384 | int err; |
1da177e4 | 385 | |
497d48bd | 386 | err = -ENOMEM; |
a5001a27 | 387 | sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); |
1da177e4 | 388 | if (!sbi) |
c5b8d0bc | 389 | goto out; |
1da177e4 | 390 | |
1da177e4 | 391 | sb->s_fs_info = sbi; |
40bf48af | 392 | mutex_init(&sbi->alloc_mutex); |
7ac9fb9c | 393 | mutex_init(&sbi->vh_mutex); |
9e6c5829 AB |
394 | spin_lock_init(&sbi->work_lock); |
395 | INIT_DELAYED_WORK(&sbi->sync_work, delayed_sync_fs); | |
717dd80e | 396 | hfsplus_fill_defaults(sbi); |
c5b8d0bc CH |
397 | |
398 | err = -EINVAL; | |
717dd80e | 399 | if (!hfsplus_parse_options(data, sbi)) { |
d6142673 | 400 | pr_err("unable to parse mount options\n"); |
c5b8d0bc | 401 | goto out_unload_nls; |
1da177e4 LT |
402 | } |
403 | ||
404 | /* temporarily use utf8 to correctly find the hidden dir below */ | |
405 | nls = sbi->nls; | |
406 | sbi->nls = load_nls("utf8"); | |
bd6a59b2 | 407 | if (!sbi->nls) { |
d6142673 | 408 | pr_err("unable to load nls for utf8\n"); |
c5b8d0bc | 409 | goto out_unload_nls; |
1da177e4 LT |
410 | } |
411 | ||
412 | /* Grab the volume header */ | |
413 | if (hfsplus_read_wrapper(sb)) { | |
414 | if (!silent) | |
d6142673 | 415 | pr_warn("unable to find HFS+ superblock\n"); |
c5b8d0bc | 416 | goto out_unload_nls; |
1da177e4 | 417 | } |
dd73a01a | 418 | vhdr = sbi->s_vhdr; |
1da177e4 LT |
419 | |
420 | /* Copy parts of the volume header into the superblock */ | |
2179d372 DE |
421 | sb->s_magic = HFSPLUS_VOLHEAD_SIG; |
422 | if (be16_to_cpu(vhdr->version) < HFSPLUS_MIN_VERSION || | |
423 | be16_to_cpu(vhdr->version) > HFSPLUS_CURRENT_VERSION) { | |
d6142673 | 424 | pr_err("wrong filesystem version\n"); |
c5b8d0bc | 425 | goto out_free_vhdr; |
1da177e4 | 426 | } |
dd73a01a CH |
427 | sbi->total_blocks = be32_to_cpu(vhdr->total_blocks); |
428 | sbi->free_blocks = be32_to_cpu(vhdr->free_blocks); | |
dd73a01a CH |
429 | sbi->next_cnid = be32_to_cpu(vhdr->next_cnid); |
430 | sbi->file_count = be32_to_cpu(vhdr->file_count); | |
431 | sbi->folder_count = be32_to_cpu(vhdr->folder_count); | |
432 | sbi->data_clump_blocks = | |
433 | be32_to_cpu(vhdr->data_clump_sz) >> sbi->alloc_blksz_shift; | |
434 | if (!sbi->data_clump_blocks) | |
435 | sbi->data_clump_blocks = 1; | |
436 | sbi->rsrc_clump_blocks = | |
437 | be32_to_cpu(vhdr->rsrc_clump_sz) >> sbi->alloc_blksz_shift; | |
438 | if (!sbi->rsrc_clump_blocks) | |
439 | sbi->rsrc_clump_blocks = 1; | |
1da177e4 | 440 | |
f1fcd9f0 CH |
441 | err = -EFBIG; |
442 | last_fs_block = sbi->total_blocks - 1; | |
443 | last_fs_page = (last_fs_block << sbi->alloc_blksz_shift) >> | |
09cbfeaf | 444 | PAGE_SHIFT; |
f1fcd9f0 CH |
445 | |
446 | if ((last_fs_block > (sector_t)(~0ULL) >> (sbi->alloc_blksz_shift - 9)) || | |
447 | (last_fs_page > (pgoff_t)(~0ULL))) { | |
d6142673 | 448 | pr_err("filesystem size too large\n"); |
c6d5f5fa CH |
449 | goto out_free_vhdr; |
450 | } | |
451 | ||
1da177e4 LT |
452 | /* Set up operations so we can load metadata */ |
453 | sb->s_op = &hfsplus_sops; | |
454 | sb->s_maxbytes = MAX_LFS_FILESIZE; | |
455 | ||
456 | if (!(vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_UNMNT))) { | |
d6142673 | 457 | pr_warn("Filesystem was not cleanly unmounted, running fsck.hfsplus is recommended. mounting read-only.\n"); |
1751e8a6 | 458 | sb->s_flags |= SB_RDONLY; |
84adede3 | 459 | } else if (test_and_clear_bit(HFSPLUS_SB_FORCE, &sbi->flags)) { |
b0b623c3 | 460 | /* nothing */ |
1da177e4 | 461 | } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) { |
d6142673 | 462 | pr_warn("Filesystem is marked locked, mounting read-only.\n"); |
1751e8a6 | 463 | sb->s_flags |= SB_RDONLY; |
2753cc28 | 464 | } else if ((vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_JOURNALED)) && |
bc98a42c | 465 | !sb_rdonly(sb)) { |
d6142673 | 466 | pr_warn("write access to a journaled filesystem is not supported, use the force option at your own risk, mounting read-only.\n"); |
1751e8a6 | 467 | sb->s_flags |= SB_RDONLY; |
1da177e4 LT |
468 | } |
469 | ||
c6d5f5fa CH |
470 | err = -EINVAL; |
471 | ||
1da177e4 | 472 | /* Load metadata objects (B*Trees) */ |
dd73a01a CH |
473 | sbi->ext_tree = hfs_btree_open(sb, HFSPLUS_EXT_CNID); |
474 | if (!sbi->ext_tree) { | |
d6142673 | 475 | pr_err("failed to load extents file\n"); |
c5b8d0bc | 476 | goto out_free_vhdr; |
1da177e4 | 477 | } |
dd73a01a CH |
478 | sbi->cat_tree = hfs_btree_open(sb, HFSPLUS_CAT_CNID); |
479 | if (!sbi->cat_tree) { | |
d6142673 | 480 | pr_err("failed to load catalog file\n"); |
c5b8d0bc | 481 | goto out_close_ext_tree; |
1da177e4 | 482 | } |
95e0d7db | 483 | atomic_set(&sbi->attr_tree_state, HFSPLUS_EMPTY_ATTR_TREE); |
324ef39a VD |
484 | if (vhdr->attr_file.total_blocks != 0) { |
485 | sbi->attr_tree = hfs_btree_open(sb, HFSPLUS_ATTR_CNID); | |
486 | if (!sbi->attr_tree) { | |
d6142673 | 487 | pr_err("failed to load attributes file\n"); |
324ef39a VD |
488 | goto out_close_cat_tree; |
489 | } | |
95e0d7db | 490 | atomic_set(&sbi->attr_tree_state, HFSPLUS_VALID_ATTR_TREE); |
324ef39a VD |
491 | } |
492 | sb->s_xattr = hfsplus_xattr_handlers; | |
1da177e4 | 493 | |
63525391 DH |
494 | inode = hfsplus_iget(sb, HFSPLUS_ALLOC_CNID); |
495 | if (IS_ERR(inode)) { | |
d6142673 | 496 | pr_err("failed to load allocation file\n"); |
63525391 | 497 | err = PTR_ERR(inode); |
324ef39a | 498 | goto out_close_attr_tree; |
1da177e4 | 499 | } |
dd73a01a | 500 | sbi->alloc_file = inode; |
1da177e4 LT |
501 | |
502 | /* Load the root directory */ | |
63525391 DH |
503 | root = hfsplus_iget(sb, HFSPLUS_ROOT_CNID); |
504 | if (IS_ERR(root)) { | |
d6142673 | 505 | pr_err("failed to load root directory\n"); |
63525391 | 506 | err = PTR_ERR(root); |
c5b8d0bc | 507 | goto out_put_alloc_file; |
1da177e4 LT |
508 | } |
509 | ||
68acb8e6 AV |
510 | sb->s_d_op = &hfsplus_dentry_operations; |
511 | sb->s_root = d_make_root(root); | |
512 | if (!sb->s_root) { | |
513 | err = -ENOMEM; | |
514 | goto out_put_alloc_file; | |
515 | } | |
516 | ||
1da177e4 LT |
517 | str.len = sizeof(HFSP_HIDDENDIR_NAME) - 1; |
518 | str.name = HFSP_HIDDENDIR_NAME; | |
5bd9d99d AK |
519 | err = hfs_find_init(sbi->cat_tree, &fd); |
520 | if (err) | |
521 | goto out_put_root; | |
89ac9b4d SS |
522 | err = hfsplus_cat_build_key(sb, fd.search_key, HFSPLUS_ROOT_CNID, &str); |
523 | if (unlikely(err < 0)) | |
524 | goto out_put_root; | |
1da177e4 LT |
525 | if (!hfs_brec_read(&fd, &entry, sizeof(entry))) { |
526 | hfs_find_exit(&fd); | |
7464726c TH |
527 | if (entry.type != cpu_to_be16(HFSPLUS_FOLDER)) { |
528 | err = -EINVAL; | |
c5b8d0bc | 529 | goto out_put_root; |
7464726c | 530 | } |
63525391 DH |
531 | inode = hfsplus_iget(sb, be32_to_cpu(entry.folder.id)); |
532 | if (IS_ERR(inode)) { | |
533 | err = PTR_ERR(inode); | |
c5b8d0bc | 534 | goto out_put_root; |
63525391 | 535 | } |
dd73a01a | 536 | sbi->hidden_dir = inode; |
1da177e4 LT |
537 | } else |
538 | hfs_find_exit(&fd); | |
539 | ||
bc98a42c | 540 | if (!sb_rdonly(sb)) { |
c5b8d0bc CH |
541 | /* |
542 | * H+LX == hfsplusutils, H+Lx == this driver, H+lx is unused | |
543 | * all three are registered with Apple for our use | |
544 | */ | |
545 | vhdr->last_mount_vers = cpu_to_be32(HFSP_MOUNT_VERSION); | |
546 | vhdr->modify_date = hfsp_now2mt(); | |
547 | be32_add_cpu(&vhdr->write_count, 1); | |
548 | vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_UNMNT); | |
549 | vhdr->attributes |= cpu_to_be32(HFSPLUS_VOL_INCNSTNT); | |
550 | hfsplus_sync_fs(sb, 1); | |
1da177e4 | 551 | |
c5b8d0bc CH |
552 | if (!sbi->hidden_dir) { |
553 | mutex_lock(&sbi->vh_mutex); | |
b0cd38c7 | 554 | sbi->hidden_dir = hfsplus_new_inode(sb, root, S_IFDIR); |
b3f2a924 AV |
555 | if (!sbi->hidden_dir) { |
556 | mutex_unlock(&sbi->vh_mutex); | |
557 | err = -ENOMEM; | |
558 | goto out_put_root; | |
559 | } | |
560 | err = hfsplus_create_cat(sbi->hidden_dir->i_ino, root, | |
561 | &str, sbi->hidden_dir); | |
324ef39a VD |
562 | if (err) { |
563 | mutex_unlock(&sbi->vh_mutex); | |
564 | goto out_put_hidden_dir; | |
565 | } | |
566 | ||
f168d9fd EF |
567 | err = hfsplus_init_security(sbi->hidden_dir, |
568 | root, &str); | |
324ef39a VD |
569 | if (err == -EOPNOTSUPP) |
570 | err = 0; /* Operation is not supported. */ | |
571 | else if (err) { | |
572 | /* | |
573 | * Try to delete anyway without | |
574 | * error analysis. | |
575 | */ | |
576 | hfsplus_delete_cat(sbi->hidden_dir->i_ino, | |
577 | root, &str); | |
578 | mutex_unlock(&sbi->vh_mutex); | |
b3f2a924 | 579 | goto out_put_hidden_dir; |
324ef39a | 580 | } |
c5b8d0bc | 581 | |
324ef39a | 582 | mutex_unlock(&sbi->vh_mutex); |
c5b8d0bc CH |
583 | hfsplus_mark_inode_dirty(sbi->hidden_dir, |
584 | HFSPLUS_I_CAT_DIRTY); | |
585 | } | |
1da177e4 | 586 | } |
c5b8d0bc | 587 | |
1da177e4 LT |
588 | unload_nls(sbi->nls); |
589 | sbi->nls = nls; | |
590 | return 0; | |
591 | ||
c5b8d0bc | 592 | out_put_hidden_dir: |
66072c29 | 593 | cancel_delayed_work_sync(&sbi->sync_work); |
c5b8d0bc CH |
594 | iput(sbi->hidden_dir); |
595 | out_put_root: | |
68acb8e6 AV |
596 | dput(sb->s_root); |
597 | sb->s_root = NULL; | |
c5b8d0bc CH |
598 | out_put_alloc_file: |
599 | iput(sbi->alloc_file); | |
324ef39a VD |
600 | out_close_attr_tree: |
601 | hfs_btree_close(sbi->attr_tree); | |
c5b8d0bc CH |
602 | out_close_cat_tree: |
603 | hfs_btree_close(sbi->cat_tree); | |
604 | out_close_ext_tree: | |
605 | hfs_btree_close(sbi->ext_tree); | |
606 | out_free_vhdr: | |
f588c960 SF |
607 | kfree(sbi->s_vhdr_buf); |
608 | kfree(sbi->s_backup_vhdr_buf); | |
c5b8d0bc CH |
609 | out_unload_nls: |
610 | unload_nls(sbi->nls); | |
6d729e44 | 611 | unload_nls(nls); |
c5b8d0bc CH |
612 | kfree(sbi); |
613 | out: | |
1da177e4 LT |
614 | return err; |
615 | } | |
616 | ||
617 | MODULE_AUTHOR("Brad Boyer"); | |
618 | MODULE_DESCRIPTION("Extended Macintosh Filesystem"); | |
619 | MODULE_LICENSE("GPL"); | |
620 | ||
e18b890b | 621 | static struct kmem_cache *hfsplus_inode_cachep; |
1da177e4 LT |
622 | |
623 | static struct inode *hfsplus_alloc_inode(struct super_block *sb) | |
624 | { | |
625 | struct hfsplus_inode_info *i; | |
626 | ||
e94b1766 | 627 | i = kmem_cache_alloc(hfsplus_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
628 | return i ? &i->vfs_inode : NULL; |
629 | } | |
630 | ||
08ab2293 | 631 | static void hfsplus_free_inode(struct inode *inode) |
1da177e4 | 632 | { |
6af502de | 633 | kmem_cache_free(hfsplus_inode_cachep, HFSPLUS_I(inode)); |
1da177e4 LT |
634 | } |
635 | ||
636 | #define HFSPLUS_INODE_SIZE sizeof(struct hfsplus_inode_info) | |
637 | ||
152a0836 AV |
638 | static struct dentry *hfsplus_mount(struct file_system_type *fs_type, |
639 | int flags, const char *dev_name, void *data) | |
1da177e4 | 640 | { |
152a0836 | 641 | return mount_bdev(fs_type, flags, dev_name, data, hfsplus_fill_super); |
1da177e4 LT |
642 | } |
643 | ||
644 | static struct file_system_type hfsplus_fs_type = { | |
645 | .owner = THIS_MODULE, | |
646 | .name = "hfsplus", | |
152a0836 | 647 | .mount = hfsplus_mount, |
1da177e4 LT |
648 | .kill_sb = kill_block_super, |
649 | .fs_flags = FS_REQUIRES_DEV, | |
650 | }; | |
7f78e035 | 651 | MODULE_ALIAS_FS("hfsplus"); |
1da177e4 | 652 | |
51cc5068 | 653 | static void hfsplus_init_once(void *p) |
1da177e4 LT |
654 | { |
655 | struct hfsplus_inode_info *i = p; | |
656 | ||
a35afb83 | 657 | inode_init_once(&i->vfs_inode); |
1da177e4 LT |
658 | } |
659 | ||
660 | static int __init init_hfsplus_fs(void) | |
661 | { | |
662 | int err; | |
663 | ||
664 | hfsplus_inode_cachep = kmem_cache_create("hfsplus_icache", | |
5d097056 | 665 | HFSPLUS_INODE_SIZE, 0, SLAB_HWCACHE_ALIGN|SLAB_ACCOUNT, |
20c2df83 | 666 | hfsplus_init_once); |
1da177e4 LT |
667 | if (!hfsplus_inode_cachep) |
668 | return -ENOMEM; | |
324ef39a VD |
669 | err = hfsplus_create_attr_tree_cache(); |
670 | if (err) | |
671 | goto destroy_inode_cache; | |
1da177e4 LT |
672 | err = register_filesystem(&hfsplus_fs_type); |
673 | if (err) | |
324ef39a VD |
674 | goto destroy_attr_tree_cache; |
675 | return 0; | |
676 | ||
677 | destroy_attr_tree_cache: | |
678 | hfsplus_destroy_attr_tree_cache(); | |
679 | ||
680 | destroy_inode_cache: | |
681 | kmem_cache_destroy(hfsplus_inode_cachep); | |
682 | ||
1da177e4 LT |
683 | return err; |
684 | } | |
685 | ||
686 | static void __exit exit_hfsplus_fs(void) | |
687 | { | |
688 | unregister_filesystem(&hfsplus_fs_type); | |
8c0a8537 KS |
689 | |
690 | /* | |
691 | * Make sure all delayed rcu free inodes are flushed before we | |
692 | * destroy cache. | |
693 | */ | |
694 | rcu_barrier(); | |
324ef39a | 695 | hfsplus_destroy_attr_tree_cache(); |
1a1d92c1 | 696 | kmem_cache_destroy(hfsplus_inode_cachep); |
1da177e4 LT |
697 | } |
698 | ||
699 | module_init(init_hfsplus_fs) | |
700 | module_exit(exit_hfsplus_fs) |