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