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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) { | |
dd73a01a | 76 | hfs_find_init(HFSPLUS_SB(inode->i_sb)->cat_tree, &fd); |
1da177e4 LT |
77 | err = hfsplus_find_cat(inode->i_sb, inode->i_ino, &fd); |
78 | if (!err) | |
79 | err = hfsplus_cat_read_inode(inode, &fd); | |
80 | hfs_find_exit(&fd); | |
fc4fff82 CH |
81 | } else { |
82 | err = hfsplus_system_read_inode(inode); | |
1da177e4 | 83 | } |
fc4fff82 CH |
84 | |
85 | if (err) { | |
86 | iget_failed(inode); | |
87 | return ERR_PTR(err); | |
1da177e4 LT |
88 | } |
89 | ||
63525391 DH |
90 | unlock_new_inode(inode); |
91 | return inode; | |
1da177e4 LT |
92 | } |
93 | ||
b5080f77 | 94 | static int hfsplus_system_write_inode(struct inode *inode) |
1da177e4 | 95 | { |
dd73a01a | 96 | struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb); |
b5080f77 CH |
97 | struct hfsplus_vh *vhdr = sbi->s_vhdr; |
98 | struct hfsplus_fork_raw *fork; | |
99 | struct hfs_btree *tree = NULL; | |
1da177e4 | 100 | |
1da177e4 | 101 | switch (inode->i_ino) { |
1da177e4 | 102 | case HFSPLUS_EXT_CNID: |
b5080f77 CH |
103 | fork = &vhdr->ext_file; |
104 | tree = sbi->ext_tree; | |
1da177e4 LT |
105 | break; |
106 | case HFSPLUS_CAT_CNID: | |
b5080f77 CH |
107 | fork = &vhdr->cat_file; |
108 | tree = sbi->cat_tree; | |
1da177e4 LT |
109 | break; |
110 | case HFSPLUS_ALLOC_CNID: | |
b5080f77 | 111 | fork = &vhdr->alloc_file; |
1da177e4 LT |
112 | break; |
113 | case HFSPLUS_START_CNID: | |
b5080f77 | 114 | fork = &vhdr->start_file; |
1da177e4 LT |
115 | break; |
116 | case HFSPLUS_ATTR_CNID: | |
b5080f77 CH |
117 | fork = &vhdr->attr_file; |
118 | tree = sbi->attr_tree; | |
119 | default: | |
120 | return -EIO; | |
121 | } | |
122 | ||
123 | if (fork->total_size != cpu_to_be64(inode->i_size)) { | |
84adede3 | 124 | set_bit(HFSPLUS_SB_WRITEBACKUP, &sbi->flags); |
b5080f77 | 125 | inode->i_sb->s_dirt = 1; |
1da177e4 | 126 | } |
b5080f77 CH |
127 | hfsplus_inode_write_fork(inode, fork); |
128 | if (tree) | |
129 | hfs_btree_write(tree); | |
130 | return 0; | |
131 | } | |
132 | ||
133 | static int hfsplus_write_inode(struct inode *inode, | |
134 | struct writeback_control *wbc) | |
135 | { | |
136 | dprint(DBG_INODE, "hfsplus_write_inode: %lu\n", inode->i_ino); | |
137 | ||
138 | hfsplus_ext_write_extent(inode); | |
139 | ||
140 | if (inode->i_ino >= HFSPLUS_FIRSTUSER_CNID || | |
141 | inode->i_ino == HFSPLUS_ROOT_CNID) | |
142 | return hfsplus_cat_write_inode(inode); | |
143 | else | |
144 | return hfsplus_system_write_inode(inode); | |
1da177e4 LT |
145 | } |
146 | ||
b57922d9 | 147 | static void hfsplus_evict_inode(struct inode *inode) |
1da177e4 | 148 | { |
b57922d9 AV |
149 | dprint(DBG_INODE, "hfsplus_evict_inode: %lu\n", inode->i_ino); |
150 | truncate_inode_pages(&inode->i_data, 0); | |
151 | end_writeback(inode); | |
1da177e4 | 152 | if (HFSPLUS_IS_RSRC(inode)) { |
6af502de CH |
153 | HFSPLUS_I(HFSPLUS_I(inode)->rsrc_inode)->rsrc_inode = NULL; |
154 | iput(HFSPLUS_I(inode)->rsrc_inode); | |
1da177e4 | 155 | } |
1da177e4 LT |
156 | } |
157 | ||
b5fc510c | 158 | int hfsplus_sync_fs(struct super_block *sb, int wait) |
1da177e4 | 159 | { |
dd73a01a CH |
160 | struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb); |
161 | struct hfsplus_vh *vhdr = sbi->s_vhdr; | |
52399b17 CH |
162 | int write_backup = 0; |
163 | int error, error2; | |
1da177e4 | 164 | |
f02e26f8 CH |
165 | if (!wait) |
166 | return 0; | |
167 | ||
1da177e4 | 168 | dprint(DBG_SUPER, "hfsplus_write_super\n"); |
ebc1ac16 | 169 | |
1da177e4 | 170 | sb->s_dirt = 0; |
1da177e4 | 171 | |
7dc4f001 CH |
172 | /* |
173 | * Explicitly write out the special metadata inodes. | |
174 | * | |
175 | * While these special inodes are marked as hashed and written | |
176 | * out peridocically by the flusher threads we redirty them | |
177 | * during writeout of normal inodes, and thus the life lock | |
178 | * prevents us from getting the latest state to disk. | |
179 | */ | |
180 | error = filemap_write_and_wait(sbi->cat_tree->inode->i_mapping); | |
181 | error2 = filemap_write_and_wait(sbi->ext_tree->inode->i_mapping); | |
182 | if (!error) | |
183 | error = error2; | |
184 | error2 = filemap_write_and_wait(sbi->alloc_file->i_mapping); | |
185 | if (!error) | |
186 | error = error2; | |
187 | ||
52399b17 CH |
188 | mutex_lock(&sbi->vh_mutex); |
189 | mutex_lock(&sbi->alloc_mutex); | |
dd73a01a | 190 | vhdr->free_blocks = cpu_to_be32(sbi->free_blocks); |
dd73a01a CH |
191 | vhdr->next_cnid = cpu_to_be32(sbi->next_cnid); |
192 | vhdr->folder_count = cpu_to_be32(sbi->folder_count); | |
193 | vhdr->file_count = cpu_to_be32(sbi->file_count); | |
1da177e4 | 194 | |
84adede3 | 195 | if (test_and_clear_bit(HFSPLUS_SB_WRITEBACKUP, &sbi->flags)) { |
52399b17 CH |
196 | memcpy(sbi->s_backup_vhdr, sbi->s_vhdr, sizeof(*sbi->s_vhdr)); |
197 | write_backup = 1; | |
1da177e4 | 198 | } |
52399b17 | 199 | |
7dc4f001 | 200 | error2 = hfsplus_submit_bio(sb->s_bdev, |
52399b17 CH |
201 | sbi->part_start + HFSPLUS_VOLHEAD_SECTOR, |
202 | sbi->s_vhdr, WRITE_SYNC); | |
7dc4f001 CH |
203 | if (!error) |
204 | error = error2; | |
52399b17 CH |
205 | if (!write_backup) |
206 | goto out; | |
207 | ||
208 | error2 = hfsplus_submit_bio(sb->s_bdev, | |
209 | sbi->part_start + sbi->sect_count - 2, | |
210 | sbi->s_backup_vhdr, WRITE_SYNC); | |
211 | if (!error) | |
212 | error2 = error; | |
213 | out: | |
dd73a01a | 214 | mutex_unlock(&sbi->alloc_mutex); |
7ac9fb9c | 215 | mutex_unlock(&sbi->vh_mutex); |
34a2d313 CH |
216 | |
217 | if (!test_bit(HFSPLUS_SB_NOBARRIER, &sbi->flags)) | |
218 | blkdev_issue_flush(sb->s_bdev, GFP_KERNEL, NULL); | |
219 | ||
52399b17 | 220 | return error; |
7fbc6df0 CH |
221 | } |
222 | ||
223 | static void hfsplus_write_super(struct super_block *sb) | |
224 | { | |
225 | if (!(sb->s_flags & MS_RDONLY)) | |
226 | hfsplus_sync_fs(sb, 1); | |
227 | else | |
228 | sb->s_dirt = 0; | |
1da177e4 LT |
229 | } |
230 | ||
231 | static void hfsplus_put_super(struct super_block *sb) | |
232 | { | |
dd73a01a CH |
233 | struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb); |
234 | ||
1da177e4 | 235 | dprint(DBG_SUPER, "hfsplus_put_super\n"); |
dd73a01a | 236 | |
945b0920 CL |
237 | if (!sb->s_fs_info) |
238 | return; | |
6cfd0148 | 239 | |
dd73a01a CH |
240 | if (!(sb->s_flags & MS_RDONLY) && sbi->s_vhdr) { |
241 | struct hfsplus_vh *vhdr = sbi->s_vhdr; | |
1da177e4 LT |
242 | |
243 | vhdr->modify_date = hfsp_now2mt(); | |
244 | vhdr->attributes |= cpu_to_be32(HFSPLUS_VOL_UNMNT); | |
245 | vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_INCNSTNT); | |
3b5ce8ae CH |
246 | |
247 | hfsplus_sync_fs(sb, 1); | |
1da177e4 LT |
248 | } |
249 | ||
dd73a01a CH |
250 | hfs_btree_close(sbi->cat_tree); |
251 | hfs_btree_close(sbi->ext_tree); | |
252 | iput(sbi->alloc_file); | |
253 | iput(sbi->hidden_dir); | |
52399b17 CH |
254 | kfree(sbi->s_vhdr); |
255 | kfree(sbi->s_backup_vhdr); | |
dd73a01a | 256 | unload_nls(sbi->nls); |
945b0920 CL |
257 | kfree(sb->s_fs_info); |
258 | sb->s_fs_info = NULL; | |
1da177e4 LT |
259 | } |
260 | ||
726c3342 | 261 | static int hfsplus_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 262 | { |
726c3342 | 263 | struct super_block *sb = dentry->d_sb; |
dd73a01a | 264 | struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb); |
25564dd8 | 265 | u64 id = huge_encode_dev(sb->s_bdev->bd_dev); |
726c3342 | 266 | |
1da177e4 LT |
267 | buf->f_type = HFSPLUS_SUPER_MAGIC; |
268 | buf->f_bsize = sb->s_blocksize; | |
dd73a01a CH |
269 | buf->f_blocks = sbi->total_blocks << sbi->fs_shift; |
270 | buf->f_bfree = sbi->free_blocks << sbi->fs_shift; | |
1da177e4 LT |
271 | buf->f_bavail = buf->f_bfree; |
272 | buf->f_files = 0xFFFFFFFF; | |
dd73a01a | 273 | buf->f_ffree = 0xFFFFFFFF - sbi->next_cnid; |
25564dd8 CL |
274 | buf->f_fsid.val[0] = (u32)id; |
275 | buf->f_fsid.val[1] = (u32)(id >> 32); | |
1da177e4 LT |
276 | buf->f_namelen = HFSPLUS_MAX_STRLEN; |
277 | ||
278 | return 0; | |
279 | } | |
280 | ||
281 | static int hfsplus_remount(struct super_block *sb, int *flags, char *data) | |
282 | { | |
283 | if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) | |
284 | return 0; | |
285 | if (!(*flags & MS_RDONLY)) { | |
dd73a01a | 286 | struct hfsplus_vh *vhdr = HFSPLUS_SB(sb)->s_vhdr; |
6f80dfe5 | 287 | int force = 0; |
b0b623c3 | 288 | |
6f80dfe5 | 289 | if (!hfsplus_parse_options_remount(data, &force)) |
b0b623c3 | 290 | return -EINVAL; |
1da177e4 LT |
291 | |
292 | if (!(vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_UNMNT))) { | |
634725a9 | 293 | printk(KERN_WARNING "hfs: filesystem was not cleanly unmounted, " |
1da177e4 LT |
294 | "running fsck.hfsplus is recommended. leaving read-only.\n"); |
295 | sb->s_flags |= MS_RDONLY; | |
296 | *flags |= MS_RDONLY; | |
6f80dfe5 | 297 | } else if (force) { |
b0b623c3 | 298 | /* nothing */ |
1da177e4 | 299 | } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) { |
634725a9 | 300 | printk(KERN_WARNING "hfs: filesystem is marked locked, leaving read-only.\n"); |
1da177e4 LT |
301 | sb->s_flags |= MS_RDONLY; |
302 | *flags |= MS_RDONLY; | |
b0b623c3 | 303 | } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_JOURNALED)) { |
634725a9 | 304 | printk(KERN_WARNING "hfs: filesystem is marked journaled, leaving read-only.\n"); |
b0b623c3 RZ |
305 | sb->s_flags |= MS_RDONLY; |
306 | *flags |= MS_RDONLY; | |
1da177e4 LT |
307 | } |
308 | } | |
309 | return 0; | |
310 | } | |
311 | ||
ee9b6d61 | 312 | static const struct super_operations hfsplus_sops = { |
1da177e4 LT |
313 | .alloc_inode = hfsplus_alloc_inode, |
314 | .destroy_inode = hfsplus_destroy_inode, | |
1da177e4 | 315 | .write_inode = hfsplus_write_inode, |
b57922d9 | 316 | .evict_inode = hfsplus_evict_inode, |
1da177e4 LT |
317 | .put_super = hfsplus_put_super, |
318 | .write_super = hfsplus_write_super, | |
7fbc6df0 | 319 | .sync_fs = hfsplus_sync_fs, |
1da177e4 LT |
320 | .statfs = hfsplus_statfs, |
321 | .remount_fs = hfsplus_remount, | |
717dd80e | 322 | .show_options = hfsplus_show_options, |
1da177e4 LT |
323 | }; |
324 | ||
325 | static int hfsplus_fill_super(struct super_block *sb, void *data, int silent) | |
326 | { | |
327 | struct hfsplus_vh *vhdr; | |
328 | struct hfsplus_sb_info *sbi; | |
329 | hfsplus_cat_entry entry; | |
330 | struct hfs_find_data fd; | |
63525391 | 331 | struct inode *root, *inode; |
1da177e4 LT |
332 | struct qstr str; |
333 | struct nls_table *nls = NULL; | |
334 | int err = -EINVAL; | |
335 | ||
a5001a27 | 336 | sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); |
1da177e4 LT |
337 | if (!sbi) |
338 | return -ENOMEM; | |
339 | ||
1da177e4 | 340 | sb->s_fs_info = sbi; |
40bf48af | 341 | mutex_init(&sbi->alloc_mutex); |
7ac9fb9c | 342 | mutex_init(&sbi->vh_mutex); |
717dd80e RZ |
343 | hfsplus_fill_defaults(sbi); |
344 | if (!hfsplus_parse_options(data, sbi)) { | |
634725a9 | 345 | printk(KERN_ERR "hfs: unable to parse mount options\n"); |
1da177e4 LT |
346 | err = -EINVAL; |
347 | goto cleanup; | |
348 | } | |
349 | ||
350 | /* temporarily use utf8 to correctly find the hidden dir below */ | |
351 | nls = sbi->nls; | |
352 | sbi->nls = load_nls("utf8"); | |
bd6a59b2 | 353 | if (!sbi->nls) { |
634725a9 | 354 | printk(KERN_ERR "hfs: unable to load nls for utf8\n"); |
1da177e4 LT |
355 | err = -EINVAL; |
356 | goto cleanup; | |
357 | } | |
358 | ||
359 | /* Grab the volume header */ | |
360 | if (hfsplus_read_wrapper(sb)) { | |
361 | if (!silent) | |
634725a9 | 362 | printk(KERN_WARNING "hfs: unable to find HFS+ superblock\n"); |
1da177e4 LT |
363 | err = -EINVAL; |
364 | goto cleanup; | |
365 | } | |
dd73a01a | 366 | vhdr = sbi->s_vhdr; |
1da177e4 LT |
367 | |
368 | /* Copy parts of the volume header into the superblock */ | |
2179d372 DE |
369 | sb->s_magic = HFSPLUS_VOLHEAD_SIG; |
370 | if (be16_to_cpu(vhdr->version) < HFSPLUS_MIN_VERSION || | |
371 | be16_to_cpu(vhdr->version) > HFSPLUS_CURRENT_VERSION) { | |
634725a9 | 372 | printk(KERN_ERR "hfs: wrong filesystem version\n"); |
1da177e4 LT |
373 | goto cleanup; |
374 | } | |
dd73a01a CH |
375 | sbi->total_blocks = be32_to_cpu(vhdr->total_blocks); |
376 | sbi->free_blocks = be32_to_cpu(vhdr->free_blocks); | |
dd73a01a CH |
377 | sbi->next_cnid = be32_to_cpu(vhdr->next_cnid); |
378 | sbi->file_count = be32_to_cpu(vhdr->file_count); | |
379 | sbi->folder_count = be32_to_cpu(vhdr->folder_count); | |
380 | sbi->data_clump_blocks = | |
381 | be32_to_cpu(vhdr->data_clump_sz) >> sbi->alloc_blksz_shift; | |
382 | if (!sbi->data_clump_blocks) | |
383 | sbi->data_clump_blocks = 1; | |
384 | sbi->rsrc_clump_blocks = | |
385 | be32_to_cpu(vhdr->rsrc_clump_sz) >> sbi->alloc_blksz_shift; | |
386 | if (!sbi->rsrc_clump_blocks) | |
387 | sbi->rsrc_clump_blocks = 1; | |
1da177e4 LT |
388 | |
389 | /* Set up operations so we can load metadata */ | |
390 | sb->s_op = &hfsplus_sops; | |
391 | sb->s_maxbytes = MAX_LFS_FILESIZE; | |
392 | ||
393 | if (!(vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_UNMNT))) { | |
634725a9 RZ |
394 | printk(KERN_WARNING "hfs: Filesystem was not cleanly unmounted, " |
395 | "running fsck.hfsplus is recommended. mounting read-only.\n"); | |
1da177e4 | 396 | sb->s_flags |= MS_RDONLY; |
84adede3 | 397 | } else if (test_and_clear_bit(HFSPLUS_SB_FORCE, &sbi->flags)) { |
b0b623c3 | 398 | /* nothing */ |
1da177e4 | 399 | } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) { |
634725a9 | 400 | printk(KERN_WARNING "hfs: Filesystem is marked locked, mounting read-only.\n"); |
1da177e4 | 401 | sb->s_flags |= MS_RDONLY; |
81a73719 | 402 | } else if ((vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_JOURNALED)) && !(sb->s_flags & MS_RDONLY)) { |
355a4696 | 403 | printk(KERN_WARNING "hfs: write access to a journaled filesystem is not supported, " |
634725a9 | 404 | "use the force option at your own risk, mounting read-only.\n"); |
b0b623c3 | 405 | sb->s_flags |= MS_RDONLY; |
1da177e4 LT |
406 | } |
407 | ||
408 | /* Load metadata objects (B*Trees) */ | |
dd73a01a CH |
409 | sbi->ext_tree = hfs_btree_open(sb, HFSPLUS_EXT_CNID); |
410 | if (!sbi->ext_tree) { | |
634725a9 | 411 | printk(KERN_ERR "hfs: failed to load extents file\n"); |
1da177e4 LT |
412 | goto cleanup; |
413 | } | |
dd73a01a CH |
414 | sbi->cat_tree = hfs_btree_open(sb, HFSPLUS_CAT_CNID); |
415 | if (!sbi->cat_tree) { | |
634725a9 | 416 | printk(KERN_ERR "hfs: failed to load catalog file\n"); |
1da177e4 LT |
417 | goto cleanup; |
418 | } | |
419 | ||
63525391 DH |
420 | inode = hfsplus_iget(sb, HFSPLUS_ALLOC_CNID); |
421 | if (IS_ERR(inode)) { | |
634725a9 | 422 | printk(KERN_ERR "hfs: failed to load allocation file\n"); |
63525391 | 423 | err = PTR_ERR(inode); |
1da177e4 LT |
424 | goto cleanup; |
425 | } | |
dd73a01a | 426 | sbi->alloc_file = inode; |
1da177e4 LT |
427 | |
428 | /* Load the root directory */ | |
63525391 DH |
429 | root = hfsplus_iget(sb, HFSPLUS_ROOT_CNID); |
430 | if (IS_ERR(root)) { | |
431 | printk(KERN_ERR "hfs: failed to load root directory\n"); | |
432 | err = PTR_ERR(root); | |
433 | goto cleanup; | |
434 | } | |
1da177e4 LT |
435 | sb->s_root = d_alloc_root(root); |
436 | if (!sb->s_root) { | |
1da177e4 | 437 | iput(root); |
63525391 | 438 | err = -ENOMEM; |
1da177e4 LT |
439 | goto cleanup; |
440 | } | |
d45bce8f | 441 | sb->s_root->d_op = &hfsplus_dentry_operations; |
1da177e4 LT |
442 | |
443 | str.len = sizeof(HFSP_HIDDENDIR_NAME) - 1; | |
444 | str.name = HFSP_HIDDENDIR_NAME; | |
dd73a01a | 445 | hfs_find_init(sbi->cat_tree, &fd); |
1da177e4 LT |
446 | hfsplus_cat_build_key(sb, fd.search_key, HFSPLUS_ROOT_CNID, &str); |
447 | if (!hfs_brec_read(&fd, &entry, sizeof(entry))) { | |
448 | hfs_find_exit(&fd); | |
449 | if (entry.type != cpu_to_be16(HFSPLUS_FOLDER)) | |
450 | goto cleanup; | |
63525391 DH |
451 | inode = hfsplus_iget(sb, be32_to_cpu(entry.folder.id)); |
452 | if (IS_ERR(inode)) { | |
453 | err = PTR_ERR(inode); | |
1da177e4 | 454 | goto cleanup; |
63525391 | 455 | } |
dd73a01a | 456 | sbi->hidden_dir = inode; |
1da177e4 LT |
457 | } else |
458 | hfs_find_exit(&fd); | |
459 | ||
460 | if (sb->s_flags & MS_RDONLY) | |
461 | goto out; | |
462 | ||
463 | /* H+LX == hfsplusutils, H+Lx == this driver, H+lx is unused | |
464 | * all three are registered with Apple for our use | |
465 | */ | |
466 | vhdr->last_mount_vers = cpu_to_be32(HFSP_MOUNT_VERSION); | |
467 | vhdr->modify_date = hfsp_now2mt(); | |
20c79e78 | 468 | be32_add_cpu(&vhdr->write_count, 1); |
1da177e4 LT |
469 | vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_UNMNT); |
470 | vhdr->attributes |= cpu_to_be32(HFSPLUS_VOL_INCNSTNT); | |
3b5ce8ae | 471 | hfsplus_sync_fs(sb, 1); |
1da177e4 | 472 | |
dd73a01a | 473 | if (!sbi->hidden_dir) { |
7ac9fb9c | 474 | mutex_lock(&sbi->vh_mutex); |
dd73a01a CH |
475 | sbi->hidden_dir = hfsplus_new_inode(sb, S_IFDIR); |
476 | hfsplus_create_cat(sbi->hidden_dir->i_ino, sb->s_root->d_inode, | |
477 | &str, sbi->hidden_dir); | |
7ac9fb9c CH |
478 | mutex_unlock(&sbi->vh_mutex); |
479 | ||
e3494705 | 480 | hfsplus_mark_inode_dirty(sbi->hidden_dir, HFSPLUS_I_CAT_DIRTY); |
1da177e4 LT |
481 | } |
482 | out: | |
483 | unload_nls(sbi->nls); | |
484 | sbi->nls = nls; | |
485 | return 0; | |
486 | ||
487 | cleanup: | |
488 | hfsplus_put_super(sb); | |
6d729e44 | 489 | unload_nls(nls); |
1da177e4 LT |
490 | return err; |
491 | } | |
492 | ||
493 | MODULE_AUTHOR("Brad Boyer"); | |
494 | MODULE_DESCRIPTION("Extended Macintosh Filesystem"); | |
495 | MODULE_LICENSE("GPL"); | |
496 | ||
e18b890b | 497 | static struct kmem_cache *hfsplus_inode_cachep; |
1da177e4 LT |
498 | |
499 | static struct inode *hfsplus_alloc_inode(struct super_block *sb) | |
500 | { | |
501 | struct hfsplus_inode_info *i; | |
502 | ||
e94b1766 | 503 | i = kmem_cache_alloc(hfsplus_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
504 | return i ? &i->vfs_inode : NULL; |
505 | } | |
506 | ||
507 | static void hfsplus_destroy_inode(struct inode *inode) | |
508 | { | |
6af502de | 509 | kmem_cache_free(hfsplus_inode_cachep, HFSPLUS_I(inode)); |
1da177e4 LT |
510 | } |
511 | ||
512 | #define HFSPLUS_INODE_SIZE sizeof(struct hfsplus_inode_info) | |
513 | ||
152a0836 AV |
514 | static struct dentry *hfsplus_mount(struct file_system_type *fs_type, |
515 | int flags, const char *dev_name, void *data) | |
1da177e4 | 516 | { |
152a0836 | 517 | return mount_bdev(fs_type, flags, dev_name, data, hfsplus_fill_super); |
1da177e4 LT |
518 | } |
519 | ||
520 | static struct file_system_type hfsplus_fs_type = { | |
521 | .owner = THIS_MODULE, | |
522 | .name = "hfsplus", | |
152a0836 | 523 | .mount = hfsplus_mount, |
1da177e4 LT |
524 | .kill_sb = kill_block_super, |
525 | .fs_flags = FS_REQUIRES_DEV, | |
526 | }; | |
527 | ||
51cc5068 | 528 | static void hfsplus_init_once(void *p) |
1da177e4 LT |
529 | { |
530 | struct hfsplus_inode_info *i = p; | |
531 | ||
a35afb83 | 532 | inode_init_once(&i->vfs_inode); |
1da177e4 LT |
533 | } |
534 | ||
535 | static int __init init_hfsplus_fs(void) | |
536 | { | |
537 | int err; | |
538 | ||
539 | hfsplus_inode_cachep = kmem_cache_create("hfsplus_icache", | |
540 | HFSPLUS_INODE_SIZE, 0, SLAB_HWCACHE_ALIGN, | |
20c2df83 | 541 | hfsplus_init_once); |
1da177e4 LT |
542 | if (!hfsplus_inode_cachep) |
543 | return -ENOMEM; | |
544 | err = register_filesystem(&hfsplus_fs_type); | |
545 | if (err) | |
546 | kmem_cache_destroy(hfsplus_inode_cachep); | |
547 | return err; | |
548 | } | |
549 | ||
550 | static void __exit exit_hfsplus_fs(void) | |
551 | { | |
552 | unregister_filesystem(&hfsplus_fs_type); | |
1a1d92c1 | 553 | kmem_cache_destroy(hfsplus_inode_cachep); |
1da177e4 LT |
554 | } |
555 | ||
556 | module_init(init_hfsplus_fs) | |
557 | module_exit(exit_hfsplus_fs) |