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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> | |
13 | #include <linux/fs.h> | |
1da177e4 | 14 | #include <linux/slab.h> |
1da177e4 LT |
15 | #include <linux/vfs.h> |
16 | #include <linux/nls.h> | |
17 | ||
18 | static struct inode *hfsplus_alloc_inode(struct super_block *sb); | |
19 | static void hfsplus_destroy_inode(struct inode *inode); | |
20 | ||
21 | #include "hfsplus_fs.h" | |
22 | ||
63525391 | 23 | struct inode *hfsplus_iget(struct super_block *sb, unsigned long ino) |
1da177e4 LT |
24 | { |
25 | struct hfs_find_data fd; | |
26 | struct hfsplus_vh *vhdr; | |
63525391 DH |
27 | struct inode *inode; |
28 | long err = -EIO; | |
29 | ||
30 | inode = iget_locked(sb, ino); | |
31 | if (!inode) | |
32 | return ERR_PTR(-ENOMEM); | |
33 | if (!(inode->i_state & I_NEW)) | |
34 | return inode; | |
1da177e4 | 35 | |
1da177e4 | 36 | INIT_LIST_HEAD(&HFSPLUS_I(inode).open_dir_list); |
895c23f8 | 37 | mutex_init(&HFSPLUS_I(inode).extents_lock); |
1da177e4 LT |
38 | HFSPLUS_I(inode).flags = 0; |
39 | HFSPLUS_I(inode).rsrc_inode = NULL; | |
94c1d318 | 40 | atomic_set(&HFSPLUS_I(inode).opencnt, 0); |
1da177e4 LT |
41 | |
42 | if (inode->i_ino >= HFSPLUS_FIRSTUSER_CNID) { | |
43 | read_inode: | |
dd73a01a | 44 | hfs_find_init(HFSPLUS_SB(inode->i_sb)->cat_tree, &fd); |
1da177e4 LT |
45 | err = hfsplus_find_cat(inode->i_sb, inode->i_ino, &fd); |
46 | if (!err) | |
47 | err = hfsplus_cat_read_inode(inode, &fd); | |
48 | hfs_find_exit(&fd); | |
49 | if (err) | |
50 | goto bad_inode; | |
63525391 | 51 | goto done; |
1da177e4 | 52 | } |
dd73a01a | 53 | vhdr = HFSPLUS_SB(inode->i_sb)->s_vhdr; |
1da177e4 LT |
54 | switch(inode->i_ino) { |
55 | case HFSPLUS_ROOT_CNID: | |
56 | goto read_inode; | |
57 | case HFSPLUS_EXT_CNID: | |
58 | hfsplus_inode_read_fork(inode, &vhdr->ext_file); | |
59 | inode->i_mapping->a_ops = &hfsplus_btree_aops; | |
60 | break; | |
61 | case HFSPLUS_CAT_CNID: | |
62 | hfsplus_inode_read_fork(inode, &vhdr->cat_file); | |
63 | inode->i_mapping->a_ops = &hfsplus_btree_aops; | |
64 | break; | |
65 | case HFSPLUS_ALLOC_CNID: | |
66 | hfsplus_inode_read_fork(inode, &vhdr->alloc_file); | |
67 | inode->i_mapping->a_ops = &hfsplus_aops; | |
68 | break; | |
69 | case HFSPLUS_START_CNID: | |
70 | hfsplus_inode_read_fork(inode, &vhdr->start_file); | |
71 | break; | |
72 | case HFSPLUS_ATTR_CNID: | |
73 | hfsplus_inode_read_fork(inode, &vhdr->attr_file); | |
74 | inode->i_mapping->a_ops = &hfsplus_btree_aops; | |
75 | break; | |
76 | default: | |
77 | goto bad_inode; | |
78 | } | |
79 | ||
63525391 DH |
80 | done: |
81 | unlock_new_inode(inode); | |
82 | return inode; | |
1da177e4 | 83 | |
63525391 DH |
84 | bad_inode: |
85 | iget_failed(inode); | |
86 | return ERR_PTR(err); | |
1da177e4 LT |
87 | } |
88 | ||
a9185b41 CH |
89 | static int hfsplus_write_inode(struct inode *inode, |
90 | struct writeback_control *wbc) | |
1da177e4 | 91 | { |
dd73a01a | 92 | struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb); |
1da177e4 LT |
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 | } | |
dd73a01a | 101 | vhdr = sbi->s_vhdr; |
1da177e4 LT |
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)) { | |
dd73a01a | 108 | sbi->flags |= HFSPLUS_SB_WRITEBACKUP; |
1da177e4 LT |
109 | inode->i_sb->s_dirt = 1; |
110 | } | |
111 | hfsplus_inode_write_fork(inode, &vhdr->ext_file); | |
dd73a01a | 112 | hfs_btree_write(sbi->ext_tree); |
1da177e4 LT |
113 | break; |
114 | case HFSPLUS_CAT_CNID: | |
115 | if (vhdr->cat_file.total_size != cpu_to_be64(inode->i_size)) { | |
dd73a01a | 116 | sbi->flags |= HFSPLUS_SB_WRITEBACKUP; |
1da177e4 LT |
117 | inode->i_sb->s_dirt = 1; |
118 | } | |
119 | hfsplus_inode_write_fork(inode, &vhdr->cat_file); | |
dd73a01a | 120 | hfs_btree_write(sbi->cat_tree); |
1da177e4 LT |
121 | break; |
122 | case HFSPLUS_ALLOC_CNID: | |
123 | if (vhdr->alloc_file.total_size != cpu_to_be64(inode->i_size)) { | |
dd73a01a | 124 | sbi->flags |= HFSPLUS_SB_WRITEBACKUP; |
1da177e4 LT |
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)) { | |
dd73a01a | 131 | sbi->flags |= HFSPLUS_SB_WRITEBACKUP; |
1da177e4 LT |
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)) { | |
dd73a01a | 138 | sbi->flags |= HFSPLUS_SB_WRITEBACKUP; |
1da177e4 LT |
139 | inode->i_sb->s_dirt = 1; |
140 | } | |
141 | hfsplus_inode_write_fork(inode, &vhdr->attr_file); | |
dd73a01a | 142 | hfs_btree_write(sbi->attr_tree); |
1da177e4 LT |
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 | 160 | { |
dd73a01a CH |
161 | struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb); |
162 | struct hfsplus_vh *vhdr = sbi->s_vhdr; | |
1da177e4 LT |
163 | |
164 | dprint(DBG_SUPER, "hfsplus_write_super\n"); | |
ebc1ac16 | 165 | |
dd73a01a | 166 | mutex_lock(&sbi->alloc_mutex); |
1da177e4 | 167 | sb->s_dirt = 0; |
1da177e4 | 168 | |
dd73a01a CH |
169 | vhdr->free_blocks = cpu_to_be32(sbi->free_blocks); |
170 | vhdr->next_alloc = cpu_to_be32(sbi->next_alloc); | |
171 | vhdr->next_cnid = cpu_to_be32(sbi->next_cnid); | |
172 | vhdr->folder_count = cpu_to_be32(sbi->folder_count); | |
173 | vhdr->file_count = cpu_to_be32(sbi->file_count); | |
1da177e4 | 174 | |
dd73a01a CH |
175 | mark_buffer_dirty(sbi->s_vhbh); |
176 | if (sbi->flags & HFSPLUS_SB_WRITEBACKUP) { | |
177 | if (sbi->sect_count) { | |
1da177e4 LT |
178 | struct buffer_head *bh; |
179 | u32 block, offset; | |
180 | ||
dd73a01a CH |
181 | block = sbi->blockoffset; |
182 | block += (sbi->sect_count - 2) >> (sb->s_blocksize_bits - 9); | |
183 | offset = ((sbi->sect_count - 2) << 9) & (sb->s_blocksize - 1); | |
184 | printk(KERN_DEBUG "hfs: backup: %u,%u,%u,%u\n", | |
185 | sbi->blockoffset, sbi->sect_count, | |
186 | block, offset); | |
1da177e4 LT |
187 | bh = sb_bread(sb, block); |
188 | if (bh) { | |
189 | vhdr = (struct hfsplus_vh *)(bh->b_data + offset); | |
190 | if (be16_to_cpu(vhdr->signature) == HFSPLUS_VOLHEAD_SIG) { | |
dd73a01a | 191 | memcpy(vhdr, sbi->s_vhdr, sizeof(*vhdr)); |
1da177e4 LT |
192 | mark_buffer_dirty(bh); |
193 | brelse(bh); | |
194 | } else | |
634725a9 | 195 | printk(KERN_WARNING "hfs: backup not found!\n"); |
1da177e4 LT |
196 | } |
197 | } | |
dd73a01a | 198 | sbi->flags &= ~HFSPLUS_SB_WRITEBACKUP; |
1da177e4 | 199 | } |
dd73a01a | 200 | mutex_unlock(&sbi->alloc_mutex); |
7fbc6df0 CH |
201 | return 0; |
202 | } | |
203 | ||
204 | static void hfsplus_write_super(struct super_block *sb) | |
205 | { | |
206 | if (!(sb->s_flags & MS_RDONLY)) | |
207 | hfsplus_sync_fs(sb, 1); | |
208 | else | |
209 | sb->s_dirt = 0; | |
1da177e4 LT |
210 | } |
211 | ||
212 | static void hfsplus_put_super(struct super_block *sb) | |
213 | { | |
dd73a01a CH |
214 | struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb); |
215 | ||
1da177e4 | 216 | dprint(DBG_SUPER, "hfsplus_put_super\n"); |
dd73a01a | 217 | |
945b0920 CL |
218 | if (!sb->s_fs_info) |
219 | return; | |
6cfd0148 | 220 | |
8c85e125 CH |
221 | if (sb->s_dirt) |
222 | hfsplus_write_super(sb); | |
dd73a01a CH |
223 | if (!(sb->s_flags & MS_RDONLY) && sbi->s_vhdr) { |
224 | struct hfsplus_vh *vhdr = sbi->s_vhdr; | |
1da177e4 LT |
225 | |
226 | vhdr->modify_date = hfsp_now2mt(); | |
227 | vhdr->attributes |= cpu_to_be32(HFSPLUS_VOL_UNMNT); | |
228 | vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_INCNSTNT); | |
dd73a01a CH |
229 | mark_buffer_dirty(sbi->s_vhbh); |
230 | sync_dirty_buffer(sbi->s_vhbh); | |
1da177e4 LT |
231 | } |
232 | ||
dd73a01a CH |
233 | hfs_btree_close(sbi->cat_tree); |
234 | hfs_btree_close(sbi->ext_tree); | |
235 | iput(sbi->alloc_file); | |
236 | iput(sbi->hidden_dir); | |
237 | brelse(sbi->s_vhbh); | |
238 | unload_nls(sbi->nls); | |
945b0920 CL |
239 | kfree(sb->s_fs_info); |
240 | sb->s_fs_info = NULL; | |
1da177e4 LT |
241 | } |
242 | ||
726c3342 | 243 | static int hfsplus_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 244 | { |
726c3342 | 245 | struct super_block *sb = dentry->d_sb; |
dd73a01a | 246 | struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb); |
25564dd8 | 247 | u64 id = huge_encode_dev(sb->s_bdev->bd_dev); |
726c3342 | 248 | |
1da177e4 LT |
249 | buf->f_type = HFSPLUS_SUPER_MAGIC; |
250 | buf->f_bsize = sb->s_blocksize; | |
dd73a01a CH |
251 | buf->f_blocks = sbi->total_blocks << sbi->fs_shift; |
252 | buf->f_bfree = sbi->free_blocks << sbi->fs_shift; | |
1da177e4 LT |
253 | buf->f_bavail = buf->f_bfree; |
254 | buf->f_files = 0xFFFFFFFF; | |
dd73a01a | 255 | buf->f_ffree = 0xFFFFFFFF - sbi->next_cnid; |
25564dd8 CL |
256 | buf->f_fsid.val[0] = (u32)id; |
257 | buf->f_fsid.val[1] = (u32)(id >> 32); | |
1da177e4 LT |
258 | buf->f_namelen = HFSPLUS_MAX_STRLEN; |
259 | ||
260 | return 0; | |
261 | } | |
262 | ||
263 | static int hfsplus_remount(struct super_block *sb, int *flags, char *data) | |
264 | { | |
265 | if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) | |
266 | return 0; | |
267 | if (!(*flags & MS_RDONLY)) { | |
dd73a01a | 268 | struct hfsplus_vh *vhdr = HFSPLUS_SB(sb)->s_vhdr; |
b0b623c3 RZ |
269 | struct hfsplus_sb_info sbi; |
270 | ||
271 | memset(&sbi, 0, sizeof(struct hfsplus_sb_info)); | |
dd73a01a | 272 | sbi.nls = HFSPLUS_SB(sb)->nls; |
b0b623c3 RZ |
273 | if (!hfsplus_parse_options(data, &sbi)) |
274 | return -EINVAL; | |
1da177e4 LT |
275 | |
276 | if (!(vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_UNMNT))) { | |
634725a9 | 277 | printk(KERN_WARNING "hfs: filesystem was not cleanly unmounted, " |
1da177e4 LT |
278 | "running fsck.hfsplus is recommended. leaving read-only.\n"); |
279 | sb->s_flags |= MS_RDONLY; | |
280 | *flags |= MS_RDONLY; | |
b0b623c3 RZ |
281 | } else if (sbi.flags & HFSPLUS_SB_FORCE) { |
282 | /* nothing */ | |
1da177e4 | 283 | } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) { |
634725a9 | 284 | printk(KERN_WARNING "hfs: filesystem is marked locked, leaving read-only.\n"); |
1da177e4 LT |
285 | sb->s_flags |= MS_RDONLY; |
286 | *flags |= MS_RDONLY; | |
b0b623c3 | 287 | } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_JOURNALED)) { |
634725a9 | 288 | printk(KERN_WARNING "hfs: filesystem is marked journaled, leaving read-only.\n"); |
b0b623c3 RZ |
289 | sb->s_flags |= MS_RDONLY; |
290 | *flags |= MS_RDONLY; | |
1da177e4 LT |
291 | } |
292 | } | |
293 | return 0; | |
294 | } | |
295 | ||
ee9b6d61 | 296 | static const struct super_operations hfsplus_sops = { |
1da177e4 LT |
297 | .alloc_inode = hfsplus_alloc_inode, |
298 | .destroy_inode = hfsplus_destroy_inode, | |
1da177e4 | 299 | .write_inode = hfsplus_write_inode, |
b57922d9 | 300 | .evict_inode = hfsplus_evict_inode, |
1da177e4 LT |
301 | .put_super = hfsplus_put_super, |
302 | .write_super = hfsplus_write_super, | |
7fbc6df0 | 303 | .sync_fs = hfsplus_sync_fs, |
1da177e4 LT |
304 | .statfs = hfsplus_statfs, |
305 | .remount_fs = hfsplus_remount, | |
717dd80e | 306 | .show_options = hfsplus_show_options, |
1da177e4 LT |
307 | }; |
308 | ||
309 | static int hfsplus_fill_super(struct super_block *sb, void *data, int silent) | |
310 | { | |
311 | struct hfsplus_vh *vhdr; | |
312 | struct hfsplus_sb_info *sbi; | |
313 | hfsplus_cat_entry entry; | |
314 | struct hfs_find_data fd; | |
63525391 | 315 | struct inode *root, *inode; |
1da177e4 LT |
316 | struct qstr str; |
317 | struct nls_table *nls = NULL; | |
318 | int err = -EINVAL; | |
319 | ||
a5001a27 | 320 | sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); |
1da177e4 LT |
321 | if (!sbi) |
322 | return -ENOMEM; | |
323 | ||
1da177e4 LT |
324 | sb->s_fs_info = sbi; |
325 | INIT_HLIST_HEAD(&sbi->rsrc_inodes); | |
40bf48af | 326 | mutex_init(&sbi->alloc_mutex); |
717dd80e RZ |
327 | hfsplus_fill_defaults(sbi); |
328 | if (!hfsplus_parse_options(data, sbi)) { | |
634725a9 | 329 | printk(KERN_ERR "hfs: unable to parse mount options\n"); |
1da177e4 LT |
330 | err = -EINVAL; |
331 | goto cleanup; | |
332 | } | |
333 | ||
334 | /* temporarily use utf8 to correctly find the hidden dir below */ | |
335 | nls = sbi->nls; | |
336 | sbi->nls = load_nls("utf8"); | |
bd6a59b2 | 337 | if (!sbi->nls) { |
634725a9 | 338 | printk(KERN_ERR "hfs: unable to load nls for utf8\n"); |
1da177e4 LT |
339 | err = -EINVAL; |
340 | goto cleanup; | |
341 | } | |
342 | ||
343 | /* Grab the volume header */ | |
344 | if (hfsplus_read_wrapper(sb)) { | |
345 | if (!silent) | |
634725a9 | 346 | printk(KERN_WARNING "hfs: unable to find HFS+ superblock\n"); |
1da177e4 LT |
347 | err = -EINVAL; |
348 | goto cleanup; | |
349 | } | |
dd73a01a | 350 | vhdr = sbi->s_vhdr; |
1da177e4 LT |
351 | |
352 | /* Copy parts of the volume header into the superblock */ | |
2179d372 DE |
353 | sb->s_magic = HFSPLUS_VOLHEAD_SIG; |
354 | if (be16_to_cpu(vhdr->version) < HFSPLUS_MIN_VERSION || | |
355 | be16_to_cpu(vhdr->version) > HFSPLUS_CURRENT_VERSION) { | |
634725a9 | 356 | printk(KERN_ERR "hfs: wrong filesystem version\n"); |
1da177e4 LT |
357 | goto cleanup; |
358 | } | |
dd73a01a CH |
359 | sbi->total_blocks = be32_to_cpu(vhdr->total_blocks); |
360 | sbi->free_blocks = be32_to_cpu(vhdr->free_blocks); | |
361 | sbi->next_alloc = be32_to_cpu(vhdr->next_alloc); | |
362 | sbi->next_cnid = be32_to_cpu(vhdr->next_cnid); | |
363 | sbi->file_count = be32_to_cpu(vhdr->file_count); | |
364 | sbi->folder_count = be32_to_cpu(vhdr->folder_count); | |
365 | sbi->data_clump_blocks = | |
366 | be32_to_cpu(vhdr->data_clump_sz) >> sbi->alloc_blksz_shift; | |
367 | if (!sbi->data_clump_blocks) | |
368 | sbi->data_clump_blocks = 1; | |
369 | sbi->rsrc_clump_blocks = | |
370 | be32_to_cpu(vhdr->rsrc_clump_sz) >> sbi->alloc_blksz_shift; | |
371 | if (!sbi->rsrc_clump_blocks) | |
372 | sbi->rsrc_clump_blocks = 1; | |
1da177e4 LT |
373 | |
374 | /* Set up operations so we can load metadata */ | |
375 | sb->s_op = &hfsplus_sops; | |
376 | sb->s_maxbytes = MAX_LFS_FILESIZE; | |
377 | ||
378 | if (!(vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_UNMNT))) { | |
634725a9 RZ |
379 | printk(KERN_WARNING "hfs: Filesystem was not cleanly unmounted, " |
380 | "running fsck.hfsplus is recommended. mounting read-only.\n"); | |
1da177e4 | 381 | sb->s_flags |= MS_RDONLY; |
b0b623c3 RZ |
382 | } else if (sbi->flags & HFSPLUS_SB_FORCE) { |
383 | /* nothing */ | |
1da177e4 | 384 | } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) { |
634725a9 | 385 | printk(KERN_WARNING "hfs: Filesystem is marked locked, mounting read-only.\n"); |
1da177e4 | 386 | sb->s_flags |= MS_RDONLY; |
81a73719 | 387 | } else if ((vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_JOURNALED)) && !(sb->s_flags & MS_RDONLY)) { |
355a4696 | 388 | printk(KERN_WARNING "hfs: write access to a journaled filesystem is not supported, " |
634725a9 | 389 | "use the force option at your own risk, mounting read-only.\n"); |
b0b623c3 | 390 | sb->s_flags |= MS_RDONLY; |
1da177e4 | 391 | } |
b0b623c3 | 392 | sbi->flags &= ~HFSPLUS_SB_FORCE; |
1da177e4 LT |
393 | |
394 | /* Load metadata objects (B*Trees) */ | |
dd73a01a CH |
395 | sbi->ext_tree = hfs_btree_open(sb, HFSPLUS_EXT_CNID); |
396 | if (!sbi->ext_tree) { | |
634725a9 | 397 | printk(KERN_ERR "hfs: failed to load extents file\n"); |
1da177e4 LT |
398 | goto cleanup; |
399 | } | |
dd73a01a CH |
400 | sbi->cat_tree = hfs_btree_open(sb, HFSPLUS_CAT_CNID); |
401 | if (!sbi->cat_tree) { | |
634725a9 | 402 | printk(KERN_ERR "hfs: failed to load catalog file\n"); |
1da177e4 LT |
403 | goto cleanup; |
404 | } | |
405 | ||
63525391 DH |
406 | inode = hfsplus_iget(sb, HFSPLUS_ALLOC_CNID); |
407 | if (IS_ERR(inode)) { | |
634725a9 | 408 | printk(KERN_ERR "hfs: failed to load allocation file\n"); |
63525391 | 409 | err = PTR_ERR(inode); |
1da177e4 LT |
410 | goto cleanup; |
411 | } | |
dd73a01a | 412 | sbi->alloc_file = inode; |
1da177e4 LT |
413 | |
414 | /* Load the root directory */ | |
63525391 DH |
415 | root = hfsplus_iget(sb, HFSPLUS_ROOT_CNID); |
416 | if (IS_ERR(root)) { | |
417 | printk(KERN_ERR "hfs: failed to load root directory\n"); | |
418 | err = PTR_ERR(root); | |
419 | goto cleanup; | |
420 | } | |
1da177e4 LT |
421 | sb->s_root = d_alloc_root(root); |
422 | if (!sb->s_root) { | |
1da177e4 | 423 | iput(root); |
63525391 | 424 | err = -ENOMEM; |
1da177e4 LT |
425 | goto cleanup; |
426 | } | |
d45bce8f | 427 | sb->s_root->d_op = &hfsplus_dentry_operations; |
1da177e4 LT |
428 | |
429 | str.len = sizeof(HFSP_HIDDENDIR_NAME) - 1; | |
430 | str.name = HFSP_HIDDENDIR_NAME; | |
dd73a01a | 431 | hfs_find_init(sbi->cat_tree, &fd); |
1da177e4 LT |
432 | hfsplus_cat_build_key(sb, fd.search_key, HFSPLUS_ROOT_CNID, &str); |
433 | if (!hfs_brec_read(&fd, &entry, sizeof(entry))) { | |
434 | hfs_find_exit(&fd); | |
435 | if (entry.type != cpu_to_be16(HFSPLUS_FOLDER)) | |
436 | goto cleanup; | |
63525391 DH |
437 | inode = hfsplus_iget(sb, be32_to_cpu(entry.folder.id)); |
438 | if (IS_ERR(inode)) { | |
439 | err = PTR_ERR(inode); | |
1da177e4 | 440 | goto cleanup; |
63525391 | 441 | } |
dd73a01a | 442 | sbi->hidden_dir = inode; |
1da177e4 LT |
443 | } else |
444 | hfs_find_exit(&fd); | |
445 | ||
446 | if (sb->s_flags & MS_RDONLY) | |
447 | goto out; | |
448 | ||
449 | /* H+LX == hfsplusutils, H+Lx == this driver, H+lx is unused | |
450 | * all three are registered with Apple for our use | |
451 | */ | |
452 | vhdr->last_mount_vers = cpu_to_be32(HFSP_MOUNT_VERSION); | |
453 | vhdr->modify_date = hfsp_now2mt(); | |
20c79e78 | 454 | be32_add_cpu(&vhdr->write_count, 1); |
1da177e4 LT |
455 | vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_UNMNT); |
456 | vhdr->attributes |= cpu_to_be32(HFSPLUS_VOL_INCNSTNT); | |
dd73a01a CH |
457 | mark_buffer_dirty(sbi->s_vhbh); |
458 | sync_dirty_buffer(sbi->s_vhbh); | |
1da177e4 | 459 | |
dd73a01a | 460 | if (!sbi->hidden_dir) { |
634725a9 | 461 | printk(KERN_DEBUG "hfs: create hidden dir...\n"); |
dd73a01a CH |
462 | sbi->hidden_dir = hfsplus_new_inode(sb, S_IFDIR); |
463 | hfsplus_create_cat(sbi->hidden_dir->i_ino, sb->s_root->d_inode, | |
464 | &str, sbi->hidden_dir); | |
465 | mark_inode_dirty(sbi->hidden_dir); | |
1da177e4 LT |
466 | } |
467 | out: | |
468 | unload_nls(sbi->nls); | |
469 | sbi->nls = nls; | |
470 | return 0; | |
471 | ||
472 | cleanup: | |
473 | hfsplus_put_super(sb); | |
6d729e44 | 474 | unload_nls(nls); |
1da177e4 LT |
475 | return err; |
476 | } | |
477 | ||
478 | MODULE_AUTHOR("Brad Boyer"); | |
479 | MODULE_DESCRIPTION("Extended Macintosh Filesystem"); | |
480 | MODULE_LICENSE("GPL"); | |
481 | ||
e18b890b | 482 | static struct kmem_cache *hfsplus_inode_cachep; |
1da177e4 LT |
483 | |
484 | static struct inode *hfsplus_alloc_inode(struct super_block *sb) | |
485 | { | |
486 | struct hfsplus_inode_info *i; | |
487 | ||
e94b1766 | 488 | i = kmem_cache_alloc(hfsplus_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
489 | return i ? &i->vfs_inode : NULL; |
490 | } | |
491 | ||
492 | static void hfsplus_destroy_inode(struct inode *inode) | |
493 | { | |
494 | kmem_cache_free(hfsplus_inode_cachep, &HFSPLUS_I(inode)); | |
495 | } | |
496 | ||
497 | #define HFSPLUS_INODE_SIZE sizeof(struct hfsplus_inode_info) | |
498 | ||
454e2398 DH |
499 | static int hfsplus_get_sb(struct file_system_type *fs_type, |
500 | int flags, const char *dev_name, void *data, | |
501 | struct vfsmount *mnt) | |
1da177e4 | 502 | { |
454e2398 DH |
503 | return get_sb_bdev(fs_type, flags, dev_name, data, hfsplus_fill_super, |
504 | mnt); | |
1da177e4 LT |
505 | } |
506 | ||
507 | static struct file_system_type hfsplus_fs_type = { | |
508 | .owner = THIS_MODULE, | |
509 | .name = "hfsplus", | |
510 | .get_sb = hfsplus_get_sb, | |
511 | .kill_sb = kill_block_super, | |
512 | .fs_flags = FS_REQUIRES_DEV, | |
513 | }; | |
514 | ||
51cc5068 | 515 | static void hfsplus_init_once(void *p) |
1da177e4 LT |
516 | { |
517 | struct hfsplus_inode_info *i = p; | |
518 | ||
a35afb83 | 519 | inode_init_once(&i->vfs_inode); |
1da177e4 LT |
520 | } |
521 | ||
522 | static int __init init_hfsplus_fs(void) | |
523 | { | |
524 | int err; | |
525 | ||
526 | hfsplus_inode_cachep = kmem_cache_create("hfsplus_icache", | |
527 | HFSPLUS_INODE_SIZE, 0, SLAB_HWCACHE_ALIGN, | |
20c2df83 | 528 | hfsplus_init_once); |
1da177e4 LT |
529 | if (!hfsplus_inode_cachep) |
530 | return -ENOMEM; | |
531 | err = register_filesystem(&hfsplus_fs_type); | |
532 | if (err) | |
533 | kmem_cache_destroy(hfsplus_inode_cachep); | |
534 | return err; | |
535 | } | |
536 | ||
537 | static void __exit exit_hfsplus_fs(void) | |
538 | { | |
539 | unregister_filesystem(&hfsplus_fs_type); | |
1a1d92c1 | 540 | kmem_cache_destroy(hfsplus_inode_cachep); |
1da177e4 LT |
541 | } |
542 | ||
543 | module_init(init_hfsplus_fs) | |
544 | module_exit(exit_hfsplus_fs) |