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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" | |
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); |
b5080f77 | 127 | inode->i_sb->s_dirt = 1; |
1da177e4 | 128 | } |
b5080f77 CH |
129 | hfsplus_inode_write_fork(inode, fork); |
130 | if (tree) | |
131 | hfs_btree_write(tree); | |
132 | return 0; | |
133 | } | |
134 | ||
135 | static int hfsplus_write_inode(struct inode *inode, | |
136 | struct writeback_control *wbc) | |
137 | { | |
dd7f3d54 AK |
138 | int err; |
139 | ||
b5080f77 CH |
140 | dprint(DBG_INODE, "hfsplus_write_inode: %lu\n", inode->i_ino); |
141 | ||
dd7f3d54 AK |
142 | err = hfsplus_ext_write_extent(inode); |
143 | if (err) | |
144 | return err; | |
b5080f77 CH |
145 | |
146 | if (inode->i_ino >= HFSPLUS_FIRSTUSER_CNID || | |
147 | inode->i_ino == HFSPLUS_ROOT_CNID) | |
148 | return hfsplus_cat_write_inode(inode); | |
149 | else | |
150 | return hfsplus_system_write_inode(inode); | |
1da177e4 LT |
151 | } |
152 | ||
b57922d9 | 153 | static void hfsplus_evict_inode(struct inode *inode) |
1da177e4 | 154 | { |
b57922d9 AV |
155 | dprint(DBG_INODE, "hfsplus_evict_inode: %lu\n", inode->i_ino); |
156 | truncate_inode_pages(&inode->i_data, 0); | |
157 | end_writeback(inode); | |
1da177e4 | 158 | if (HFSPLUS_IS_RSRC(inode)) { |
6af502de CH |
159 | HFSPLUS_I(HFSPLUS_I(inode)->rsrc_inode)->rsrc_inode = NULL; |
160 | iput(HFSPLUS_I(inode)->rsrc_inode); | |
1da177e4 | 161 | } |
1da177e4 LT |
162 | } |
163 | ||
b5fc510c | 164 | int hfsplus_sync_fs(struct super_block *sb, int wait) |
1da177e4 | 165 | { |
dd73a01a CH |
166 | struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb); |
167 | struct hfsplus_vh *vhdr = sbi->s_vhdr; | |
52399b17 CH |
168 | int write_backup = 0; |
169 | int error, error2; | |
1da177e4 | 170 | |
f02e26f8 CH |
171 | if (!wait) |
172 | return 0; | |
1da177e4 LT |
173 | |
174 | dprint(DBG_SUPER, "hfsplus_write_super\n"); | |
ebc1ac16 | 175 | |
1da177e4 | 176 | sb->s_dirt = 0; |
1da177e4 | 177 | |
7dc4f001 CH |
178 | /* |
179 | * Explicitly write out the special metadata inodes. | |
180 | * | |
181 | * While these special inodes are marked as hashed and written | |
182 | * out peridocically by the flusher threads we redirty them | |
183 | * during writeout of normal inodes, and thus the life lock | |
184 | * prevents us from getting the latest state to disk. | |
185 | */ | |
186 | error = filemap_write_and_wait(sbi->cat_tree->inode->i_mapping); | |
187 | error2 = filemap_write_and_wait(sbi->ext_tree->inode->i_mapping); | |
188 | if (!error) | |
189 | error = error2; | |
190 | error2 = filemap_write_and_wait(sbi->alloc_file->i_mapping); | |
191 | if (!error) | |
192 | error = error2; | |
193 | ||
52399b17 CH |
194 | mutex_lock(&sbi->vh_mutex); |
195 | mutex_lock(&sbi->alloc_mutex); | |
dd73a01a | 196 | vhdr->free_blocks = cpu_to_be32(sbi->free_blocks); |
dd73a01a CH |
197 | vhdr->next_cnid = cpu_to_be32(sbi->next_cnid); |
198 | vhdr->folder_count = cpu_to_be32(sbi->folder_count); | |
199 | vhdr->file_count = cpu_to_be32(sbi->file_count); | |
1da177e4 | 200 | |
84adede3 | 201 | if (test_and_clear_bit(HFSPLUS_SB_WRITEBACKUP, &sbi->flags)) { |
52399b17 CH |
202 | memcpy(sbi->s_backup_vhdr, sbi->s_vhdr, sizeof(*sbi->s_vhdr)); |
203 | write_backup = 1; | |
1da177e4 | 204 | } |
52399b17 | 205 | |
6596528e | 206 | error2 = hfsplus_submit_bio(sb, |
52399b17 | 207 | sbi->part_start + HFSPLUS_VOLHEAD_SECTOR, |
6596528e | 208 | sbi->s_vhdr_buf, NULL, WRITE_SYNC); |
7dc4f001 CH |
209 | if (!error) |
210 | error = error2; | |
52399b17 CH |
211 | if (!write_backup) |
212 | goto out; | |
213 | ||
6596528e | 214 | error2 = hfsplus_submit_bio(sb, |
52399b17 | 215 | sbi->part_start + sbi->sect_count - 2, |
6596528e | 216 | sbi->s_backup_vhdr_buf, NULL, WRITE_SYNC); |
52399b17 CH |
217 | if (!error) |
218 | error2 = error; | |
219 | out: | |
dd73a01a | 220 | mutex_unlock(&sbi->alloc_mutex); |
7ac9fb9c | 221 | mutex_unlock(&sbi->vh_mutex); |
34a2d313 CH |
222 | |
223 | if (!test_bit(HFSPLUS_SB_NOBARRIER, &sbi->flags)) | |
224 | blkdev_issue_flush(sb->s_bdev, GFP_KERNEL, NULL); | |
225 | ||
52399b17 | 226 | return error; |
7fbc6df0 CH |
227 | } |
228 | ||
229 | static void hfsplus_write_super(struct super_block *sb) | |
230 | { | |
231 | if (!(sb->s_flags & MS_RDONLY)) | |
232 | hfsplus_sync_fs(sb, 1); | |
233 | else | |
234 | sb->s_dirt = 0; | |
1da177e4 LT |
235 | } |
236 | ||
237 | static void hfsplus_put_super(struct super_block *sb) | |
238 | { | |
dd73a01a CH |
239 | struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb); |
240 | ||
1da177e4 | 241 | dprint(DBG_SUPER, "hfsplus_put_super\n"); |
dd73a01a | 242 | |
945b0920 CL |
243 | if (!sb->s_fs_info) |
244 | return; | |
6cfd0148 | 245 | |
dd73a01a CH |
246 | if (!(sb->s_flags & MS_RDONLY) && sbi->s_vhdr) { |
247 | struct hfsplus_vh *vhdr = sbi->s_vhdr; | |
1da177e4 LT |
248 | |
249 | vhdr->modify_date = hfsp_now2mt(); | |
250 | vhdr->attributes |= cpu_to_be32(HFSPLUS_VOL_UNMNT); | |
251 | vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_INCNSTNT); | |
3b5ce8ae CH |
252 | |
253 | hfsplus_sync_fs(sb, 1); | |
1da177e4 LT |
254 | } |
255 | ||
dd73a01a CH |
256 | hfs_btree_close(sbi->cat_tree); |
257 | hfs_btree_close(sbi->ext_tree); | |
258 | iput(sbi->alloc_file); | |
259 | iput(sbi->hidden_dir); | |
6596528e SF |
260 | kfree(sbi->s_vhdr_buf); |
261 | kfree(sbi->s_backup_vhdr_buf); | |
dd73a01a | 262 | unload_nls(sbi->nls); |
945b0920 CL |
263 | kfree(sb->s_fs_info); |
264 | sb->s_fs_info = NULL; | |
1da177e4 LT |
265 | } |
266 | ||
726c3342 | 267 | static int hfsplus_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 268 | { |
726c3342 | 269 | struct super_block *sb = dentry->d_sb; |
dd73a01a | 270 | struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb); |
25564dd8 | 271 | u64 id = huge_encode_dev(sb->s_bdev->bd_dev); |
726c3342 | 272 | |
1da177e4 LT |
273 | buf->f_type = HFSPLUS_SUPER_MAGIC; |
274 | buf->f_bsize = sb->s_blocksize; | |
dd73a01a CH |
275 | buf->f_blocks = sbi->total_blocks << sbi->fs_shift; |
276 | buf->f_bfree = sbi->free_blocks << sbi->fs_shift; | |
1da177e4 LT |
277 | buf->f_bavail = buf->f_bfree; |
278 | buf->f_files = 0xFFFFFFFF; | |
dd73a01a | 279 | buf->f_ffree = 0xFFFFFFFF - sbi->next_cnid; |
25564dd8 CL |
280 | buf->f_fsid.val[0] = (u32)id; |
281 | buf->f_fsid.val[1] = (u32)(id >> 32); | |
1da177e4 LT |
282 | buf->f_namelen = HFSPLUS_MAX_STRLEN; |
283 | ||
284 | return 0; | |
285 | } | |
286 | ||
287 | static int hfsplus_remount(struct super_block *sb, int *flags, char *data) | |
288 | { | |
289 | if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) | |
290 | return 0; | |
291 | if (!(*flags & MS_RDONLY)) { | |
dd73a01a | 292 | struct hfsplus_vh *vhdr = HFSPLUS_SB(sb)->s_vhdr; |
6f80dfe5 | 293 | int force = 0; |
b0b623c3 | 294 | |
6f80dfe5 | 295 | if (!hfsplus_parse_options_remount(data, &force)) |
b0b623c3 | 296 | return -EINVAL; |
1da177e4 LT |
297 | |
298 | if (!(vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_UNMNT))) { | |
2753cc28 AS |
299 | printk(KERN_WARNING "hfs: filesystem was " |
300 | "not cleanly unmounted, " | |
301 | "running fsck.hfsplus is recommended. " | |
302 | "leaving read-only.\n"); | |
1da177e4 LT |
303 | sb->s_flags |= MS_RDONLY; |
304 | *flags |= MS_RDONLY; | |
6f80dfe5 | 305 | } else if (force) { |
b0b623c3 | 306 | /* nothing */ |
2753cc28 AS |
307 | } else if (vhdr->attributes & |
308 | cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) { | |
309 | printk(KERN_WARNING "hfs: filesystem is marked locked, " | |
310 | "leaving read-only.\n"); | |
1da177e4 LT |
311 | sb->s_flags |= MS_RDONLY; |
312 | *flags |= MS_RDONLY; | |
2753cc28 AS |
313 | } else if (vhdr->attributes & |
314 | cpu_to_be32(HFSPLUS_VOL_JOURNALED)) { | |
315 | printk(KERN_WARNING "hfs: filesystem is " | |
316 | "marked journaled, " | |
317 | "leaving read-only.\n"); | |
b0b623c3 RZ |
318 | sb->s_flags |= MS_RDONLY; |
319 | *flags |= MS_RDONLY; | |
1da177e4 LT |
320 | } |
321 | } | |
322 | return 0; | |
323 | } | |
324 | ||
ee9b6d61 | 325 | static const struct super_operations hfsplus_sops = { |
1da177e4 LT |
326 | .alloc_inode = hfsplus_alloc_inode, |
327 | .destroy_inode = hfsplus_destroy_inode, | |
1da177e4 | 328 | .write_inode = hfsplus_write_inode, |
b57922d9 | 329 | .evict_inode = hfsplus_evict_inode, |
1da177e4 LT |
330 | .put_super = hfsplus_put_super, |
331 | .write_super = hfsplus_write_super, | |
7fbc6df0 | 332 | .sync_fs = hfsplus_sync_fs, |
1da177e4 LT |
333 | .statfs = hfsplus_statfs, |
334 | .remount_fs = hfsplus_remount, | |
717dd80e | 335 | .show_options = hfsplus_show_options, |
1da177e4 LT |
336 | }; |
337 | ||
338 | static int hfsplus_fill_super(struct super_block *sb, void *data, int silent) | |
339 | { | |
340 | struct hfsplus_vh *vhdr; | |
341 | struct hfsplus_sb_info *sbi; | |
342 | hfsplus_cat_entry entry; | |
343 | struct hfs_find_data fd; | |
63525391 | 344 | struct inode *root, *inode; |
1da177e4 LT |
345 | struct qstr str; |
346 | struct nls_table *nls = NULL; | |
f1fcd9f0 | 347 | u64 last_fs_block, last_fs_page; |
c5b8d0bc | 348 | int err; |
1da177e4 | 349 | |
c5b8d0bc | 350 | err = -EINVAL; |
a5001a27 | 351 | sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); |
1da177e4 | 352 | if (!sbi) |
c5b8d0bc | 353 | goto out; |
1da177e4 | 354 | |
1da177e4 | 355 | sb->s_fs_info = sbi; |
40bf48af | 356 | mutex_init(&sbi->alloc_mutex); |
7ac9fb9c | 357 | mutex_init(&sbi->vh_mutex); |
717dd80e | 358 | hfsplus_fill_defaults(sbi); |
c5b8d0bc CH |
359 | |
360 | err = -EINVAL; | |
717dd80e | 361 | if (!hfsplus_parse_options(data, sbi)) { |
634725a9 | 362 | printk(KERN_ERR "hfs: unable to parse mount options\n"); |
c5b8d0bc | 363 | goto out_unload_nls; |
1da177e4 LT |
364 | } |
365 | ||
366 | /* temporarily use utf8 to correctly find the hidden dir below */ | |
367 | nls = sbi->nls; | |
368 | sbi->nls = load_nls("utf8"); | |
bd6a59b2 | 369 | if (!sbi->nls) { |
634725a9 | 370 | printk(KERN_ERR "hfs: unable to load nls for utf8\n"); |
c5b8d0bc | 371 | goto out_unload_nls; |
1da177e4 LT |
372 | } |
373 | ||
374 | /* Grab the volume header */ | |
375 | if (hfsplus_read_wrapper(sb)) { | |
376 | if (!silent) | |
634725a9 | 377 | printk(KERN_WARNING "hfs: unable to find HFS+ superblock\n"); |
c5b8d0bc | 378 | goto out_unload_nls; |
1da177e4 | 379 | } |
dd73a01a | 380 | vhdr = sbi->s_vhdr; |
1da177e4 LT |
381 | |
382 | /* Copy parts of the volume header into the superblock */ | |
2179d372 DE |
383 | sb->s_magic = HFSPLUS_VOLHEAD_SIG; |
384 | if (be16_to_cpu(vhdr->version) < HFSPLUS_MIN_VERSION || | |
385 | be16_to_cpu(vhdr->version) > HFSPLUS_CURRENT_VERSION) { | |
634725a9 | 386 | printk(KERN_ERR "hfs: wrong filesystem version\n"); |
c5b8d0bc | 387 | goto out_free_vhdr; |
1da177e4 | 388 | } |
dd73a01a CH |
389 | sbi->total_blocks = be32_to_cpu(vhdr->total_blocks); |
390 | sbi->free_blocks = be32_to_cpu(vhdr->free_blocks); | |
dd73a01a CH |
391 | sbi->next_cnid = be32_to_cpu(vhdr->next_cnid); |
392 | sbi->file_count = be32_to_cpu(vhdr->file_count); | |
393 | sbi->folder_count = be32_to_cpu(vhdr->folder_count); | |
394 | sbi->data_clump_blocks = | |
395 | be32_to_cpu(vhdr->data_clump_sz) >> sbi->alloc_blksz_shift; | |
396 | if (!sbi->data_clump_blocks) | |
397 | sbi->data_clump_blocks = 1; | |
398 | sbi->rsrc_clump_blocks = | |
399 | be32_to_cpu(vhdr->rsrc_clump_sz) >> sbi->alloc_blksz_shift; | |
400 | if (!sbi->rsrc_clump_blocks) | |
401 | sbi->rsrc_clump_blocks = 1; | |
1da177e4 | 402 | |
f1fcd9f0 CH |
403 | err = -EFBIG; |
404 | last_fs_block = sbi->total_blocks - 1; | |
405 | last_fs_page = (last_fs_block << sbi->alloc_blksz_shift) >> | |
406 | PAGE_CACHE_SHIFT; | |
407 | ||
408 | if ((last_fs_block > (sector_t)(~0ULL) >> (sbi->alloc_blksz_shift - 9)) || | |
409 | (last_fs_page > (pgoff_t)(~0ULL))) { | |
c6d5f5fa CH |
410 | printk(KERN_ERR "hfs: filesystem size too large.\n"); |
411 | goto out_free_vhdr; | |
412 | } | |
413 | ||
1da177e4 LT |
414 | /* Set up operations so we can load metadata */ |
415 | sb->s_op = &hfsplus_sops; | |
416 | sb->s_maxbytes = MAX_LFS_FILESIZE; | |
417 | ||
418 | if (!(vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_UNMNT))) { | |
2753cc28 AS |
419 | printk(KERN_WARNING "hfs: Filesystem was " |
420 | "not cleanly unmounted, " | |
421 | "running fsck.hfsplus is recommended. " | |
422 | "mounting read-only.\n"); | |
1da177e4 | 423 | sb->s_flags |= MS_RDONLY; |
84adede3 | 424 | } else if (test_and_clear_bit(HFSPLUS_SB_FORCE, &sbi->flags)) { |
b0b623c3 | 425 | /* nothing */ |
1da177e4 | 426 | } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) { |
634725a9 | 427 | printk(KERN_WARNING "hfs: Filesystem is marked locked, mounting read-only.\n"); |
1da177e4 | 428 | sb->s_flags |= MS_RDONLY; |
2753cc28 AS |
429 | } else if ((vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_JOURNALED)) && |
430 | !(sb->s_flags & MS_RDONLY)) { | |
431 | printk(KERN_WARNING "hfs: write access to " | |
432 | "a journaled filesystem is not supported, " | |
433 | "use the force option at your own risk, " | |
434 | "mounting read-only.\n"); | |
b0b623c3 | 435 | sb->s_flags |= MS_RDONLY; |
1da177e4 LT |
436 | } |
437 | ||
c6d5f5fa CH |
438 | err = -EINVAL; |
439 | ||
1da177e4 | 440 | /* Load metadata objects (B*Trees) */ |
dd73a01a CH |
441 | sbi->ext_tree = hfs_btree_open(sb, HFSPLUS_EXT_CNID); |
442 | if (!sbi->ext_tree) { | |
634725a9 | 443 | printk(KERN_ERR "hfs: failed to load extents file\n"); |
c5b8d0bc | 444 | goto out_free_vhdr; |
1da177e4 | 445 | } |
dd73a01a CH |
446 | sbi->cat_tree = hfs_btree_open(sb, HFSPLUS_CAT_CNID); |
447 | if (!sbi->cat_tree) { | |
634725a9 | 448 | printk(KERN_ERR "hfs: failed to load catalog file\n"); |
c5b8d0bc | 449 | goto out_close_ext_tree; |
1da177e4 LT |
450 | } |
451 | ||
63525391 DH |
452 | inode = hfsplus_iget(sb, HFSPLUS_ALLOC_CNID); |
453 | if (IS_ERR(inode)) { | |
634725a9 | 454 | printk(KERN_ERR "hfs: failed to load allocation file\n"); |
63525391 | 455 | err = PTR_ERR(inode); |
c5b8d0bc | 456 | goto out_close_cat_tree; |
1da177e4 | 457 | } |
dd73a01a | 458 | sbi->alloc_file = inode; |
1da177e4 LT |
459 | |
460 | /* Load the root directory */ | |
63525391 DH |
461 | root = hfsplus_iget(sb, HFSPLUS_ROOT_CNID); |
462 | if (IS_ERR(root)) { | |
463 | printk(KERN_ERR "hfs: failed to load root directory\n"); | |
464 | err = PTR_ERR(root); | |
c5b8d0bc | 465 | goto out_put_alloc_file; |
1da177e4 LT |
466 | } |
467 | ||
468 | str.len = sizeof(HFSP_HIDDENDIR_NAME) - 1; | |
469 | str.name = HFSP_HIDDENDIR_NAME; | |
5bd9d99d AK |
470 | err = hfs_find_init(sbi->cat_tree, &fd); |
471 | if (err) | |
472 | goto out_put_root; | |
1da177e4 LT |
473 | hfsplus_cat_build_key(sb, fd.search_key, HFSPLUS_ROOT_CNID, &str); |
474 | if (!hfs_brec_read(&fd, &entry, sizeof(entry))) { | |
475 | hfs_find_exit(&fd); | |
476 | if (entry.type != cpu_to_be16(HFSPLUS_FOLDER)) | |
c5b8d0bc | 477 | goto out_put_root; |
63525391 DH |
478 | inode = hfsplus_iget(sb, be32_to_cpu(entry.folder.id)); |
479 | if (IS_ERR(inode)) { | |
480 | err = PTR_ERR(inode); | |
c5b8d0bc | 481 | goto out_put_root; |
63525391 | 482 | } |
dd73a01a | 483 | sbi->hidden_dir = inode; |
1da177e4 LT |
484 | } else |
485 | hfs_find_exit(&fd); | |
486 | ||
c5b8d0bc CH |
487 | if (!(sb->s_flags & MS_RDONLY)) { |
488 | /* | |
489 | * H+LX == hfsplusutils, H+Lx == this driver, H+lx is unused | |
490 | * all three are registered with Apple for our use | |
491 | */ | |
492 | vhdr->last_mount_vers = cpu_to_be32(HFSP_MOUNT_VERSION); | |
493 | vhdr->modify_date = hfsp_now2mt(); | |
494 | be32_add_cpu(&vhdr->write_count, 1); | |
495 | vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_UNMNT); | |
496 | vhdr->attributes |= cpu_to_be32(HFSPLUS_VOL_INCNSTNT); | |
497 | hfsplus_sync_fs(sb, 1); | |
1da177e4 | 498 | |
c5b8d0bc CH |
499 | if (!sbi->hidden_dir) { |
500 | mutex_lock(&sbi->vh_mutex); | |
501 | sbi->hidden_dir = hfsplus_new_inode(sb, S_IFDIR); | |
502 | hfsplus_create_cat(sbi->hidden_dir->i_ino, root, &str, | |
503 | sbi->hidden_dir); | |
504 | mutex_unlock(&sbi->vh_mutex); | |
505 | ||
506 | hfsplus_mark_inode_dirty(sbi->hidden_dir, | |
507 | HFSPLUS_I_CAT_DIRTY); | |
508 | } | |
1da177e4 | 509 | } |
c5b8d0bc CH |
510 | |
511 | sb->s_d_op = &hfsplus_dentry_operations; | |
512 | sb->s_root = d_alloc_root(root); | |
513 | if (!sb->s_root) { | |
514 | err = -ENOMEM; | |
515 | goto out_put_hidden_dir; | |
516 | } | |
517 | ||
1da177e4 LT |
518 | unload_nls(sbi->nls); |
519 | sbi->nls = nls; | |
520 | return 0; | |
521 | ||
c5b8d0bc CH |
522 | out_put_hidden_dir: |
523 | iput(sbi->hidden_dir); | |
524 | out_put_root: | |
032016a5 | 525 | iput(root); |
c5b8d0bc CH |
526 | out_put_alloc_file: |
527 | iput(sbi->alloc_file); | |
528 | out_close_cat_tree: | |
529 | hfs_btree_close(sbi->cat_tree); | |
530 | out_close_ext_tree: | |
531 | hfs_btree_close(sbi->ext_tree); | |
532 | out_free_vhdr: | |
f588c960 SF |
533 | kfree(sbi->s_vhdr_buf); |
534 | kfree(sbi->s_backup_vhdr_buf); | |
c5b8d0bc CH |
535 | out_unload_nls: |
536 | unload_nls(sbi->nls); | |
6d729e44 | 537 | unload_nls(nls); |
c5b8d0bc CH |
538 | kfree(sbi); |
539 | out: | |
1da177e4 LT |
540 | return err; |
541 | } | |
542 | ||
543 | MODULE_AUTHOR("Brad Boyer"); | |
544 | MODULE_DESCRIPTION("Extended Macintosh Filesystem"); | |
545 | MODULE_LICENSE("GPL"); | |
546 | ||
e18b890b | 547 | static struct kmem_cache *hfsplus_inode_cachep; |
1da177e4 LT |
548 | |
549 | static struct inode *hfsplus_alloc_inode(struct super_block *sb) | |
550 | { | |
551 | struct hfsplus_inode_info *i; | |
552 | ||
e94b1766 | 553 | i = kmem_cache_alloc(hfsplus_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
554 | return i ? &i->vfs_inode : NULL; |
555 | } | |
556 | ||
fa0d7e3d | 557 | static void hfsplus_i_callback(struct rcu_head *head) |
1da177e4 | 558 | { |
fa0d7e3d NP |
559 | struct inode *inode = container_of(head, struct inode, i_rcu); |
560 | ||
561 | INIT_LIST_HEAD(&inode->i_dentry); | |
6af502de | 562 | kmem_cache_free(hfsplus_inode_cachep, HFSPLUS_I(inode)); |
1da177e4 LT |
563 | } |
564 | ||
fa0d7e3d NP |
565 | static void hfsplus_destroy_inode(struct inode *inode) |
566 | { | |
567 | call_rcu(&inode->i_rcu, hfsplus_i_callback); | |
568 | } | |
569 | ||
1da177e4 LT |
570 | #define HFSPLUS_INODE_SIZE sizeof(struct hfsplus_inode_info) |
571 | ||
152a0836 AV |
572 | static struct dentry *hfsplus_mount(struct file_system_type *fs_type, |
573 | int flags, const char *dev_name, void *data) | |
1da177e4 | 574 | { |
152a0836 | 575 | return mount_bdev(fs_type, flags, dev_name, data, hfsplus_fill_super); |
1da177e4 LT |
576 | } |
577 | ||
578 | static struct file_system_type hfsplus_fs_type = { | |
579 | .owner = THIS_MODULE, | |
580 | .name = "hfsplus", | |
152a0836 | 581 | .mount = hfsplus_mount, |
1da177e4 LT |
582 | .kill_sb = kill_block_super, |
583 | .fs_flags = FS_REQUIRES_DEV, | |
584 | }; | |
585 | ||
51cc5068 | 586 | static void hfsplus_init_once(void *p) |
1da177e4 LT |
587 | { |
588 | struct hfsplus_inode_info *i = p; | |
589 | ||
a35afb83 | 590 | inode_init_once(&i->vfs_inode); |
1da177e4 LT |
591 | } |
592 | ||
593 | static int __init init_hfsplus_fs(void) | |
594 | { | |
595 | int err; | |
596 | ||
597 | hfsplus_inode_cachep = kmem_cache_create("hfsplus_icache", | |
598 | HFSPLUS_INODE_SIZE, 0, SLAB_HWCACHE_ALIGN, | |
20c2df83 | 599 | hfsplus_init_once); |
1da177e4 LT |
600 | if (!hfsplus_inode_cachep) |
601 | return -ENOMEM; | |
602 | err = register_filesystem(&hfsplus_fs_type); | |
603 | if (err) | |
604 | kmem_cache_destroy(hfsplus_inode_cachep); | |
605 | return err; | |
606 | } | |
607 | ||
608 | static void __exit exit_hfsplus_fs(void) | |
609 | { | |
610 | unregister_filesystem(&hfsplus_fs_type); | |
1a1d92c1 | 611 | kmem_cache_destroy(hfsplus_inode_cachep); |
1da177e4 LT |
612 | } |
613 | ||
614 | module_init(init_hfsplus_fs) | |
615 | module_exit(exit_hfsplus_fs) |