Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * linux/fs/hfsplus/super.c | |
3 | * | |
4 | * Copyright (C) 2001 | |
5 | * Brad Boyer (flar@allandria.com) | |
6 | * (C) 2003 Ardis Technologies <roman@ardistech.com> | |
7 | * | |
8 | */ | |
9 | ||
1da177e4 LT |
10 | #include <linux/module.h> |
11 | #include <linux/init.h> | |
12 | #include <linux/pagemap.h> | |
13 | #include <linux/fs.h> | |
1da177e4 | 14 | #include <linux/slab.h> |
405f5571 | 15 | #include <linux/smp_lock.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 | ||
63525391 | 24 | struct inode *hfsplus_iget(struct super_block *sb, unsigned long ino) |
1da177e4 LT |
25 | { |
26 | struct hfs_find_data fd; | |
27 | struct hfsplus_vh *vhdr; | |
63525391 DH |
28 | struct inode *inode; |
29 | long err = -EIO; | |
30 | ||
31 | inode = iget_locked(sb, ino); | |
32 | if (!inode) | |
33 | return ERR_PTR(-ENOMEM); | |
34 | if (!(inode->i_state & I_NEW)) | |
35 | return inode; | |
1da177e4 | 36 | |
1da177e4 | 37 | INIT_LIST_HEAD(&HFSPLUS_I(inode).open_dir_list); |
895c23f8 | 38 | mutex_init(&HFSPLUS_I(inode).extents_lock); |
1da177e4 LT |
39 | HFSPLUS_I(inode).flags = 0; |
40 | HFSPLUS_I(inode).rsrc_inode = NULL; | |
94c1d318 | 41 | atomic_set(&HFSPLUS_I(inode).opencnt, 0); |
1da177e4 LT |
42 | |
43 | if (inode->i_ino >= HFSPLUS_FIRSTUSER_CNID) { | |
44 | read_inode: | |
45 | hfs_find_init(HFSPLUS_SB(inode->i_sb).cat_tree, &fd); | |
46 | err = hfsplus_find_cat(inode->i_sb, inode->i_ino, &fd); | |
47 | if (!err) | |
48 | err = hfsplus_cat_read_inode(inode, &fd); | |
49 | hfs_find_exit(&fd); | |
50 | if (err) | |
51 | goto bad_inode; | |
63525391 | 52 | goto done; |
1da177e4 LT |
53 | } |
54 | vhdr = HFSPLUS_SB(inode->i_sb).s_vhdr; | |
55 | switch(inode->i_ino) { | |
56 | case HFSPLUS_ROOT_CNID: | |
57 | goto read_inode; | |
58 | case HFSPLUS_EXT_CNID: | |
59 | hfsplus_inode_read_fork(inode, &vhdr->ext_file); | |
60 | inode->i_mapping->a_ops = &hfsplus_btree_aops; | |
61 | break; | |
62 | case HFSPLUS_CAT_CNID: | |
63 | hfsplus_inode_read_fork(inode, &vhdr->cat_file); | |
64 | inode->i_mapping->a_ops = &hfsplus_btree_aops; | |
65 | break; | |
66 | case HFSPLUS_ALLOC_CNID: | |
67 | hfsplus_inode_read_fork(inode, &vhdr->alloc_file); | |
68 | inode->i_mapping->a_ops = &hfsplus_aops; | |
69 | break; | |
70 | case HFSPLUS_START_CNID: | |
71 | hfsplus_inode_read_fork(inode, &vhdr->start_file); | |
72 | break; | |
73 | case HFSPLUS_ATTR_CNID: | |
74 | hfsplus_inode_read_fork(inode, &vhdr->attr_file); | |
75 | inode->i_mapping->a_ops = &hfsplus_btree_aops; | |
76 | break; | |
77 | default: | |
78 | goto bad_inode; | |
79 | } | |
80 | ||
63525391 DH |
81 | done: |
82 | unlock_new_inode(inode); | |
83 | return inode; | |
1da177e4 | 84 | |
63525391 DH |
85 | bad_inode: |
86 | iget_failed(inode); | |
87 | return ERR_PTR(err); | |
1da177e4 LT |
88 | } |
89 | ||
a9185b41 CH |
90 | static int hfsplus_write_inode(struct inode *inode, |
91 | struct writeback_control *wbc) | |
1da177e4 LT |
92 | { |
93 | struct hfsplus_vh *vhdr; | |
94 | int ret = 0; | |
95 | ||
96 | dprint(DBG_INODE, "hfsplus_write_inode: %lu\n", inode->i_ino); | |
97 | hfsplus_ext_write_extent(inode); | |
98 | if (inode->i_ino >= HFSPLUS_FIRSTUSER_CNID) { | |
99 | return hfsplus_cat_write_inode(inode); | |
100 | } | |
101 | vhdr = HFSPLUS_SB(inode->i_sb).s_vhdr; | |
102 | switch (inode->i_ino) { | |
103 | case HFSPLUS_ROOT_CNID: | |
104 | ret = hfsplus_cat_write_inode(inode); | |
105 | break; | |
106 | case HFSPLUS_EXT_CNID: | |
107 | if (vhdr->ext_file.total_size != cpu_to_be64(inode->i_size)) { | |
108 | HFSPLUS_SB(inode->i_sb).flags |= HFSPLUS_SB_WRITEBACKUP; | |
109 | inode->i_sb->s_dirt = 1; | |
110 | } | |
111 | hfsplus_inode_write_fork(inode, &vhdr->ext_file); | |
112 | hfs_btree_write(HFSPLUS_SB(inode->i_sb).ext_tree); | |
113 | break; | |
114 | case HFSPLUS_CAT_CNID: | |
115 | if (vhdr->cat_file.total_size != cpu_to_be64(inode->i_size)) { | |
116 | HFSPLUS_SB(inode->i_sb).flags |= HFSPLUS_SB_WRITEBACKUP; | |
117 | inode->i_sb->s_dirt = 1; | |
118 | } | |
119 | hfsplus_inode_write_fork(inode, &vhdr->cat_file); | |
120 | hfs_btree_write(HFSPLUS_SB(inode->i_sb).cat_tree); | |
121 | break; | |
122 | case HFSPLUS_ALLOC_CNID: | |
123 | if (vhdr->alloc_file.total_size != cpu_to_be64(inode->i_size)) { | |
124 | HFSPLUS_SB(inode->i_sb).flags |= HFSPLUS_SB_WRITEBACKUP; | |
125 | inode->i_sb->s_dirt = 1; | |
126 | } | |
127 | hfsplus_inode_write_fork(inode, &vhdr->alloc_file); | |
128 | break; | |
129 | case HFSPLUS_START_CNID: | |
130 | if (vhdr->start_file.total_size != cpu_to_be64(inode->i_size)) { | |
131 | HFSPLUS_SB(inode->i_sb).flags |= HFSPLUS_SB_WRITEBACKUP; | |
132 | inode->i_sb->s_dirt = 1; | |
133 | } | |
134 | hfsplus_inode_write_fork(inode, &vhdr->start_file); | |
135 | break; | |
136 | case HFSPLUS_ATTR_CNID: | |
137 | if (vhdr->attr_file.total_size != cpu_to_be64(inode->i_size)) { | |
138 | HFSPLUS_SB(inode->i_sb).flags |= HFSPLUS_SB_WRITEBACKUP; | |
139 | inode->i_sb->s_dirt = 1; | |
140 | } | |
141 | hfsplus_inode_write_fork(inode, &vhdr->attr_file); | |
142 | hfs_btree_write(HFSPLUS_SB(inode->i_sb).attr_tree); | |
143 | break; | |
144 | } | |
145 | return ret; | |
146 | } | |
147 | ||
b57922d9 | 148 | static void hfsplus_evict_inode(struct inode *inode) |
1da177e4 | 149 | { |
b57922d9 AV |
150 | dprint(DBG_INODE, "hfsplus_evict_inode: %lu\n", inode->i_ino); |
151 | truncate_inode_pages(&inode->i_data, 0); | |
152 | end_writeback(inode); | |
1da177e4 LT |
153 | if (HFSPLUS_IS_RSRC(inode)) { |
154 | HFSPLUS_I(HFSPLUS_I(inode).rsrc_inode).rsrc_inode = NULL; | |
155 | iput(HFSPLUS_I(inode).rsrc_inode); | |
156 | } | |
1da177e4 LT |
157 | } |
158 | ||
b5fc510c | 159 | int hfsplus_sync_fs(struct super_block *sb, int wait) |
1da177e4 LT |
160 | { |
161 | struct hfsplus_vh *vhdr = HFSPLUS_SB(sb).s_vhdr; | |
162 | ||
163 | dprint(DBG_SUPER, "hfsplus_write_super\n"); | |
ebc1ac16 CH |
164 | |
165 | lock_super(sb); | |
1da177e4 | 166 | sb->s_dirt = 0; |
1da177e4 LT |
167 | |
168 | vhdr->free_blocks = cpu_to_be32(HFSPLUS_SB(sb).free_blocks); | |
169 | vhdr->next_alloc = cpu_to_be32(HFSPLUS_SB(sb).next_alloc); | |
170 | vhdr->next_cnid = cpu_to_be32(HFSPLUS_SB(sb).next_cnid); | |
171 | vhdr->folder_count = cpu_to_be32(HFSPLUS_SB(sb).folder_count); | |
172 | vhdr->file_count = cpu_to_be32(HFSPLUS_SB(sb).file_count); | |
173 | ||
174 | mark_buffer_dirty(HFSPLUS_SB(sb).s_vhbh); | |
175 | if (HFSPLUS_SB(sb).flags & HFSPLUS_SB_WRITEBACKUP) { | |
176 | if (HFSPLUS_SB(sb).sect_count) { | |
177 | struct buffer_head *bh; | |
178 | u32 block, offset; | |
179 | ||
180 | block = HFSPLUS_SB(sb).blockoffset; | |
181 | block += (HFSPLUS_SB(sb).sect_count - 2) >> (sb->s_blocksize_bits - 9); | |
182 | offset = ((HFSPLUS_SB(sb).sect_count - 2) << 9) & (sb->s_blocksize - 1); | |
634725a9 | 183 | printk(KERN_DEBUG "hfs: backup: %u,%u,%u,%u\n", HFSPLUS_SB(sb).blockoffset, |
1da177e4 LT |
184 | HFSPLUS_SB(sb).sect_count, block, offset); |
185 | bh = sb_bread(sb, block); | |
186 | if (bh) { | |
187 | vhdr = (struct hfsplus_vh *)(bh->b_data + offset); | |
188 | if (be16_to_cpu(vhdr->signature) == HFSPLUS_VOLHEAD_SIG) { | |
189 | memcpy(vhdr, HFSPLUS_SB(sb).s_vhdr, sizeof(*vhdr)); | |
190 | mark_buffer_dirty(bh); | |
191 | brelse(bh); | |
192 | } else | |
634725a9 | 193 | printk(KERN_WARNING "hfs: backup not found!\n"); |
1da177e4 LT |
194 | } |
195 | } | |
196 | HFSPLUS_SB(sb).flags &= ~HFSPLUS_SB_WRITEBACKUP; | |
197 | } | |
ebc1ac16 | 198 | unlock_super(sb); |
7fbc6df0 CH |
199 | return 0; |
200 | } | |
201 | ||
202 | static void hfsplus_write_super(struct super_block *sb) | |
203 | { | |
204 | if (!(sb->s_flags & MS_RDONLY)) | |
205 | hfsplus_sync_fs(sb, 1); | |
206 | else | |
207 | sb->s_dirt = 0; | |
1da177e4 LT |
208 | } |
209 | ||
210 | static void hfsplus_put_super(struct super_block *sb) | |
211 | { | |
212 | dprint(DBG_SUPER, "hfsplus_put_super\n"); | |
945b0920 CL |
213 | if (!sb->s_fs_info) |
214 | return; | |
6cfd0148 CH |
215 | |
216 | lock_kernel(); | |
217 | ||
8c85e125 CH |
218 | if (sb->s_dirt) |
219 | hfsplus_write_super(sb); | |
945b0920 | 220 | if (!(sb->s_flags & MS_RDONLY) && HFSPLUS_SB(sb).s_vhdr) { |
1da177e4 LT |
221 | struct hfsplus_vh *vhdr = HFSPLUS_SB(sb).s_vhdr; |
222 | ||
223 | vhdr->modify_date = hfsp_now2mt(); | |
224 | vhdr->attributes |= cpu_to_be32(HFSPLUS_VOL_UNMNT); | |
225 | vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_INCNSTNT); | |
226 | mark_buffer_dirty(HFSPLUS_SB(sb).s_vhbh); | |
e39f07c8 | 227 | sync_dirty_buffer(HFSPLUS_SB(sb).s_vhbh); |
1da177e4 LT |
228 | } |
229 | ||
230 | hfs_btree_close(HFSPLUS_SB(sb).cat_tree); | |
231 | hfs_btree_close(HFSPLUS_SB(sb).ext_tree); | |
232 | iput(HFSPLUS_SB(sb).alloc_file); | |
233 | iput(HFSPLUS_SB(sb).hidden_dir); | |
234 | brelse(HFSPLUS_SB(sb).s_vhbh); | |
6d729e44 | 235 | unload_nls(HFSPLUS_SB(sb).nls); |
945b0920 CL |
236 | kfree(sb->s_fs_info); |
237 | sb->s_fs_info = NULL; | |
6cfd0148 CH |
238 | |
239 | unlock_kernel(); | |
1da177e4 LT |
240 | } |
241 | ||
726c3342 | 242 | static int hfsplus_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 243 | { |
726c3342 | 244 | struct super_block *sb = dentry->d_sb; |
25564dd8 | 245 | u64 id = huge_encode_dev(sb->s_bdev->bd_dev); |
726c3342 | 246 | |
1da177e4 LT |
247 | buf->f_type = HFSPLUS_SUPER_MAGIC; |
248 | buf->f_bsize = sb->s_blocksize; | |
249 | buf->f_blocks = HFSPLUS_SB(sb).total_blocks << HFSPLUS_SB(sb).fs_shift; | |
250 | buf->f_bfree = HFSPLUS_SB(sb).free_blocks << HFSPLUS_SB(sb).fs_shift; | |
251 | buf->f_bavail = buf->f_bfree; | |
252 | buf->f_files = 0xFFFFFFFF; | |
253 | buf->f_ffree = 0xFFFFFFFF - HFSPLUS_SB(sb).next_cnid; | |
25564dd8 CL |
254 | buf->f_fsid.val[0] = (u32)id; |
255 | buf->f_fsid.val[1] = (u32)(id >> 32); | |
1da177e4 LT |
256 | buf->f_namelen = HFSPLUS_MAX_STRLEN; |
257 | ||
258 | return 0; | |
259 | } | |
260 | ||
261 | static int hfsplus_remount(struct super_block *sb, int *flags, char *data) | |
262 | { | |
263 | if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) | |
264 | return 0; | |
265 | if (!(*flags & MS_RDONLY)) { | |
266 | struct hfsplus_vh *vhdr = HFSPLUS_SB(sb).s_vhdr; | |
b0b623c3 RZ |
267 | struct hfsplus_sb_info sbi; |
268 | ||
269 | memset(&sbi, 0, sizeof(struct hfsplus_sb_info)); | |
270 | sbi.nls = HFSPLUS_SB(sb).nls; | |
271 | if (!hfsplus_parse_options(data, &sbi)) | |
272 | return -EINVAL; | |
1da177e4 LT |
273 | |
274 | if (!(vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_UNMNT))) { | |
634725a9 | 275 | printk(KERN_WARNING "hfs: filesystem was not cleanly unmounted, " |
1da177e4 LT |
276 | "running fsck.hfsplus is recommended. leaving read-only.\n"); |
277 | sb->s_flags |= MS_RDONLY; | |
278 | *flags |= MS_RDONLY; | |
b0b623c3 RZ |
279 | } else if (sbi.flags & HFSPLUS_SB_FORCE) { |
280 | /* nothing */ | |
1da177e4 | 281 | } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) { |
634725a9 | 282 | printk(KERN_WARNING "hfs: filesystem is marked locked, leaving read-only.\n"); |
1da177e4 LT |
283 | sb->s_flags |= MS_RDONLY; |
284 | *flags |= MS_RDONLY; | |
b0b623c3 | 285 | } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_JOURNALED)) { |
634725a9 | 286 | printk(KERN_WARNING "hfs: filesystem is marked journaled, leaving read-only.\n"); |
b0b623c3 RZ |
287 | sb->s_flags |= MS_RDONLY; |
288 | *flags |= MS_RDONLY; | |
1da177e4 LT |
289 | } |
290 | } | |
291 | return 0; | |
292 | } | |
293 | ||
ee9b6d61 | 294 | static const struct super_operations hfsplus_sops = { |
1da177e4 LT |
295 | .alloc_inode = hfsplus_alloc_inode, |
296 | .destroy_inode = hfsplus_destroy_inode, | |
1da177e4 | 297 | .write_inode = hfsplus_write_inode, |
b57922d9 | 298 | .evict_inode = hfsplus_evict_inode, |
1da177e4 LT |
299 | .put_super = hfsplus_put_super, |
300 | .write_super = hfsplus_write_super, | |
7fbc6df0 | 301 | .sync_fs = hfsplus_sync_fs, |
1da177e4 LT |
302 | .statfs = hfsplus_statfs, |
303 | .remount_fs = hfsplus_remount, | |
717dd80e | 304 | .show_options = hfsplus_show_options, |
1da177e4 LT |
305 | }; |
306 | ||
307 | static int hfsplus_fill_super(struct super_block *sb, void *data, int silent) | |
308 | { | |
309 | struct hfsplus_vh *vhdr; | |
310 | struct hfsplus_sb_info *sbi; | |
311 | hfsplus_cat_entry entry; | |
312 | struct hfs_find_data fd; | |
63525391 | 313 | struct inode *root, *inode; |
1da177e4 LT |
314 | struct qstr str; |
315 | struct nls_table *nls = NULL; | |
316 | int err = -EINVAL; | |
317 | ||
a5001a27 | 318 | sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); |
1da177e4 LT |
319 | if (!sbi) |
320 | return -ENOMEM; | |
321 | ||
1da177e4 LT |
322 | sb->s_fs_info = sbi; |
323 | INIT_HLIST_HEAD(&sbi->rsrc_inodes); | |
717dd80e RZ |
324 | hfsplus_fill_defaults(sbi); |
325 | if (!hfsplus_parse_options(data, sbi)) { | |
634725a9 | 326 | printk(KERN_ERR "hfs: unable to parse mount options\n"); |
1da177e4 LT |
327 | err = -EINVAL; |
328 | goto cleanup; | |
329 | } | |
330 | ||
331 | /* temporarily use utf8 to correctly find the hidden dir below */ | |
332 | nls = sbi->nls; | |
333 | sbi->nls = load_nls("utf8"); | |
bd6a59b2 | 334 | if (!sbi->nls) { |
634725a9 | 335 | printk(KERN_ERR "hfs: unable to load nls for utf8\n"); |
1da177e4 LT |
336 | err = -EINVAL; |
337 | goto cleanup; | |
338 | } | |
339 | ||
340 | /* Grab the volume header */ | |
341 | if (hfsplus_read_wrapper(sb)) { | |
342 | if (!silent) | |
634725a9 | 343 | printk(KERN_WARNING "hfs: unable to find HFS+ superblock\n"); |
1da177e4 LT |
344 | err = -EINVAL; |
345 | goto cleanup; | |
346 | } | |
347 | vhdr = HFSPLUS_SB(sb).s_vhdr; | |
348 | ||
349 | /* Copy parts of the volume header into the superblock */ | |
2179d372 DE |
350 | sb->s_magic = HFSPLUS_VOLHEAD_SIG; |
351 | if (be16_to_cpu(vhdr->version) < HFSPLUS_MIN_VERSION || | |
352 | be16_to_cpu(vhdr->version) > HFSPLUS_CURRENT_VERSION) { | |
634725a9 | 353 | printk(KERN_ERR "hfs: wrong filesystem version\n"); |
1da177e4 LT |
354 | goto cleanup; |
355 | } | |
356 | HFSPLUS_SB(sb).total_blocks = be32_to_cpu(vhdr->total_blocks); | |
357 | HFSPLUS_SB(sb).free_blocks = be32_to_cpu(vhdr->free_blocks); | |
358 | HFSPLUS_SB(sb).next_alloc = be32_to_cpu(vhdr->next_alloc); | |
359 | HFSPLUS_SB(sb).next_cnid = be32_to_cpu(vhdr->next_cnid); | |
360 | HFSPLUS_SB(sb).file_count = be32_to_cpu(vhdr->file_count); | |
361 | HFSPLUS_SB(sb).folder_count = be32_to_cpu(vhdr->folder_count); | |
362 | HFSPLUS_SB(sb).data_clump_blocks = be32_to_cpu(vhdr->data_clump_sz) >> HFSPLUS_SB(sb).alloc_blksz_shift; | |
363 | if (!HFSPLUS_SB(sb).data_clump_blocks) | |
364 | HFSPLUS_SB(sb).data_clump_blocks = 1; | |
365 | HFSPLUS_SB(sb).rsrc_clump_blocks = be32_to_cpu(vhdr->rsrc_clump_sz) >> HFSPLUS_SB(sb).alloc_blksz_shift; | |
366 | if (!HFSPLUS_SB(sb).rsrc_clump_blocks) | |
367 | HFSPLUS_SB(sb).rsrc_clump_blocks = 1; | |
368 | ||
369 | /* Set up operations so we can load metadata */ | |
370 | sb->s_op = &hfsplus_sops; | |
371 | sb->s_maxbytes = MAX_LFS_FILESIZE; | |
372 | ||
373 | if (!(vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_UNMNT))) { | |
634725a9 RZ |
374 | printk(KERN_WARNING "hfs: Filesystem was not cleanly unmounted, " |
375 | "running fsck.hfsplus is recommended. mounting read-only.\n"); | |
1da177e4 | 376 | sb->s_flags |= MS_RDONLY; |
b0b623c3 RZ |
377 | } else if (sbi->flags & HFSPLUS_SB_FORCE) { |
378 | /* nothing */ | |
1da177e4 | 379 | } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) { |
634725a9 | 380 | printk(KERN_WARNING "hfs: Filesystem is marked locked, mounting read-only.\n"); |
1da177e4 | 381 | sb->s_flags |= MS_RDONLY; |
81a73719 | 382 | } else if ((vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_JOURNALED)) && !(sb->s_flags & MS_RDONLY)) { |
355a4696 | 383 | printk(KERN_WARNING "hfs: write access to a journaled filesystem is not supported, " |
634725a9 | 384 | "use the force option at your own risk, mounting read-only.\n"); |
b0b623c3 | 385 | sb->s_flags |= MS_RDONLY; |
1da177e4 | 386 | } |
b0b623c3 | 387 | sbi->flags &= ~HFSPLUS_SB_FORCE; |
1da177e4 LT |
388 | |
389 | /* Load metadata objects (B*Trees) */ | |
390 | HFSPLUS_SB(sb).ext_tree = hfs_btree_open(sb, HFSPLUS_EXT_CNID); | |
391 | if (!HFSPLUS_SB(sb).ext_tree) { | |
634725a9 | 392 | printk(KERN_ERR "hfs: failed to load extents file\n"); |
1da177e4 LT |
393 | goto cleanup; |
394 | } | |
395 | HFSPLUS_SB(sb).cat_tree = hfs_btree_open(sb, HFSPLUS_CAT_CNID); | |
396 | if (!HFSPLUS_SB(sb).cat_tree) { | |
634725a9 | 397 | printk(KERN_ERR "hfs: failed to load catalog file\n"); |
1da177e4 LT |
398 | goto cleanup; |
399 | } | |
400 | ||
63525391 DH |
401 | inode = hfsplus_iget(sb, HFSPLUS_ALLOC_CNID); |
402 | if (IS_ERR(inode)) { | |
634725a9 | 403 | printk(KERN_ERR "hfs: failed to load allocation file\n"); |
63525391 | 404 | err = PTR_ERR(inode); |
1da177e4 LT |
405 | goto cleanup; |
406 | } | |
63525391 | 407 | HFSPLUS_SB(sb).alloc_file = inode; |
1da177e4 LT |
408 | |
409 | /* Load the root directory */ | |
63525391 DH |
410 | root = hfsplus_iget(sb, HFSPLUS_ROOT_CNID); |
411 | if (IS_ERR(root)) { | |
412 | printk(KERN_ERR "hfs: failed to load root directory\n"); | |
413 | err = PTR_ERR(root); | |
414 | goto cleanup; | |
415 | } | |
1da177e4 LT |
416 | sb->s_root = d_alloc_root(root); |
417 | if (!sb->s_root) { | |
1da177e4 | 418 | iput(root); |
63525391 | 419 | err = -ENOMEM; |
1da177e4 LT |
420 | goto cleanup; |
421 | } | |
d45bce8f | 422 | sb->s_root->d_op = &hfsplus_dentry_operations; |
1da177e4 LT |
423 | |
424 | str.len = sizeof(HFSP_HIDDENDIR_NAME) - 1; | |
425 | str.name = HFSP_HIDDENDIR_NAME; | |
426 | hfs_find_init(HFSPLUS_SB(sb).cat_tree, &fd); | |
427 | hfsplus_cat_build_key(sb, fd.search_key, HFSPLUS_ROOT_CNID, &str); | |
428 | if (!hfs_brec_read(&fd, &entry, sizeof(entry))) { | |
429 | hfs_find_exit(&fd); | |
430 | if (entry.type != cpu_to_be16(HFSPLUS_FOLDER)) | |
431 | goto cleanup; | |
63525391 DH |
432 | inode = hfsplus_iget(sb, be32_to_cpu(entry.folder.id)); |
433 | if (IS_ERR(inode)) { | |
434 | err = PTR_ERR(inode); | |
1da177e4 | 435 | goto cleanup; |
63525391 DH |
436 | } |
437 | HFSPLUS_SB(sb).hidden_dir = inode; | |
1da177e4 LT |
438 | } else |
439 | hfs_find_exit(&fd); | |
440 | ||
441 | if (sb->s_flags & MS_RDONLY) | |
442 | goto out; | |
443 | ||
444 | /* H+LX == hfsplusutils, H+Lx == this driver, H+lx is unused | |
445 | * all three are registered with Apple for our use | |
446 | */ | |
447 | vhdr->last_mount_vers = cpu_to_be32(HFSP_MOUNT_VERSION); | |
448 | vhdr->modify_date = hfsp_now2mt(); | |
20c79e78 | 449 | be32_add_cpu(&vhdr->write_count, 1); |
1da177e4 LT |
450 | vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_UNMNT); |
451 | vhdr->attributes |= cpu_to_be32(HFSPLUS_VOL_INCNSTNT); | |
452 | mark_buffer_dirty(HFSPLUS_SB(sb).s_vhbh); | |
e39f07c8 | 453 | sync_dirty_buffer(HFSPLUS_SB(sb).s_vhbh); |
1da177e4 LT |
454 | |
455 | if (!HFSPLUS_SB(sb).hidden_dir) { | |
634725a9 | 456 | printk(KERN_DEBUG "hfs: create hidden dir...\n"); |
1da177e4 LT |
457 | HFSPLUS_SB(sb).hidden_dir = hfsplus_new_inode(sb, S_IFDIR); |
458 | hfsplus_create_cat(HFSPLUS_SB(sb).hidden_dir->i_ino, sb->s_root->d_inode, | |
459 | &str, HFSPLUS_SB(sb).hidden_dir); | |
460 | mark_inode_dirty(HFSPLUS_SB(sb).hidden_dir); | |
461 | } | |
462 | out: | |
463 | unload_nls(sbi->nls); | |
464 | sbi->nls = nls; | |
465 | return 0; | |
466 | ||
467 | cleanup: | |
468 | hfsplus_put_super(sb); | |
6d729e44 | 469 | unload_nls(nls); |
1da177e4 LT |
470 | return err; |
471 | } | |
472 | ||
473 | MODULE_AUTHOR("Brad Boyer"); | |
474 | MODULE_DESCRIPTION("Extended Macintosh Filesystem"); | |
475 | MODULE_LICENSE("GPL"); | |
476 | ||
e18b890b | 477 | static struct kmem_cache *hfsplus_inode_cachep; |
1da177e4 LT |
478 | |
479 | static struct inode *hfsplus_alloc_inode(struct super_block *sb) | |
480 | { | |
481 | struct hfsplus_inode_info *i; | |
482 | ||
e94b1766 | 483 | i = kmem_cache_alloc(hfsplus_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
484 | return i ? &i->vfs_inode : NULL; |
485 | } | |
486 | ||
487 | static void hfsplus_destroy_inode(struct inode *inode) | |
488 | { | |
489 | kmem_cache_free(hfsplus_inode_cachep, &HFSPLUS_I(inode)); | |
490 | } | |
491 | ||
492 | #define HFSPLUS_INODE_SIZE sizeof(struct hfsplus_inode_info) | |
493 | ||
454e2398 DH |
494 | static int hfsplus_get_sb(struct file_system_type *fs_type, |
495 | int flags, const char *dev_name, void *data, | |
496 | struct vfsmount *mnt) | |
1da177e4 | 497 | { |
454e2398 DH |
498 | return get_sb_bdev(fs_type, flags, dev_name, data, hfsplus_fill_super, |
499 | mnt); | |
1da177e4 LT |
500 | } |
501 | ||
502 | static struct file_system_type hfsplus_fs_type = { | |
503 | .owner = THIS_MODULE, | |
504 | .name = "hfsplus", | |
505 | .get_sb = hfsplus_get_sb, | |
506 | .kill_sb = kill_block_super, | |
507 | .fs_flags = FS_REQUIRES_DEV, | |
508 | }; | |
509 | ||
51cc5068 | 510 | static void hfsplus_init_once(void *p) |
1da177e4 LT |
511 | { |
512 | struct hfsplus_inode_info *i = p; | |
513 | ||
a35afb83 | 514 | inode_init_once(&i->vfs_inode); |
1da177e4 LT |
515 | } |
516 | ||
517 | static int __init init_hfsplus_fs(void) | |
518 | { | |
519 | int err; | |
520 | ||
521 | hfsplus_inode_cachep = kmem_cache_create("hfsplus_icache", | |
522 | HFSPLUS_INODE_SIZE, 0, SLAB_HWCACHE_ALIGN, | |
20c2df83 | 523 | hfsplus_init_once); |
1da177e4 LT |
524 | if (!hfsplus_inode_cachep) |
525 | return -ENOMEM; | |
526 | err = register_filesystem(&hfsplus_fs_type); | |
527 | if (err) | |
528 | kmem_cache_destroy(hfsplus_inode_cachep); | |
529 | return err; | |
530 | } | |
531 | ||
532 | static void __exit exit_hfsplus_fs(void) | |
533 | { | |
534 | unregister_filesystem(&hfsplus_fs_type); | |
1a1d92c1 | 535 | kmem_cache_destroy(hfsplus_inode_cachep); |
1da177e4 LT |
536 | } |
537 | ||
538 | module_init(init_hfsplus_fs) | |
539 | module_exit(exit_hfsplus_fs) |