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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 | ||
10 | #include <linux/config.h> | |
11 | #include <linux/module.h> | |
12 | #include <linux/init.h> | |
13 | #include <linux/pagemap.h> | |
14 | #include <linux/fs.h> | |
15 | #include <linux/sched.h> | |
16 | #include <linux/slab.h> | |
17 | #include <linux/version.h> | |
18 | #include <linux/vfs.h> | |
19 | #include <linux/nls.h> | |
20 | ||
21 | static struct inode *hfsplus_alloc_inode(struct super_block *sb); | |
22 | static void hfsplus_destroy_inode(struct inode *inode); | |
23 | ||
24 | #include "hfsplus_fs.h" | |
25 | ||
26 | void hfsplus_inode_check(struct super_block *sb) | |
27 | { | |
28 | #if 0 | |
29 | u32 cnt = atomic_read(&HFSPLUS_SB(sb).inode_cnt); | |
30 | u32 last_cnt = HFSPLUS_SB(sb).last_inode_cnt; | |
31 | ||
32 | if (cnt <= (last_cnt / 2) || | |
33 | cnt >= (last_cnt * 2)) { | |
34 | HFSPLUS_SB(sb).last_inode_cnt = cnt; | |
35 | printk("inode_check: %u,%u,%u\n", cnt, last_cnt, | |
36 | HFSPLUS_SB(sb).cat_tree ? HFSPLUS_SB(sb).cat_tree->node_hash_cnt : 0); | |
37 | } | |
38 | #endif | |
39 | } | |
40 | ||
41 | static void hfsplus_read_inode(struct inode *inode) | |
42 | { | |
43 | struct hfs_find_data fd; | |
44 | struct hfsplus_vh *vhdr; | |
45 | int err; | |
46 | ||
47 | atomic_inc(&HFSPLUS_SB(inode->i_sb).inode_cnt); | |
48 | hfsplus_inode_check(inode->i_sb); | |
49 | INIT_LIST_HEAD(&HFSPLUS_I(inode).open_dir_list); | |
50 | init_MUTEX(&HFSPLUS_I(inode).extents_lock); | |
51 | HFSPLUS_I(inode).flags = 0; | |
52 | HFSPLUS_I(inode).rsrc_inode = NULL; | |
94c1d318 | 53 | atomic_set(&HFSPLUS_I(inode).opencnt, 0); |
1da177e4 LT |
54 | |
55 | if (inode->i_ino >= HFSPLUS_FIRSTUSER_CNID) { | |
56 | read_inode: | |
57 | hfs_find_init(HFSPLUS_SB(inode->i_sb).cat_tree, &fd); | |
58 | err = hfsplus_find_cat(inode->i_sb, inode->i_ino, &fd); | |
59 | if (!err) | |
60 | err = hfsplus_cat_read_inode(inode, &fd); | |
61 | hfs_find_exit(&fd); | |
62 | if (err) | |
63 | goto bad_inode; | |
64 | return; | |
65 | } | |
66 | vhdr = HFSPLUS_SB(inode->i_sb).s_vhdr; | |
67 | switch(inode->i_ino) { | |
68 | case HFSPLUS_ROOT_CNID: | |
69 | goto read_inode; | |
70 | case HFSPLUS_EXT_CNID: | |
71 | hfsplus_inode_read_fork(inode, &vhdr->ext_file); | |
72 | inode->i_mapping->a_ops = &hfsplus_btree_aops; | |
73 | break; | |
74 | case HFSPLUS_CAT_CNID: | |
75 | hfsplus_inode_read_fork(inode, &vhdr->cat_file); | |
76 | inode->i_mapping->a_ops = &hfsplus_btree_aops; | |
77 | break; | |
78 | case HFSPLUS_ALLOC_CNID: | |
79 | hfsplus_inode_read_fork(inode, &vhdr->alloc_file); | |
80 | inode->i_mapping->a_ops = &hfsplus_aops; | |
81 | break; | |
82 | case HFSPLUS_START_CNID: | |
83 | hfsplus_inode_read_fork(inode, &vhdr->start_file); | |
84 | break; | |
85 | case HFSPLUS_ATTR_CNID: | |
86 | hfsplus_inode_read_fork(inode, &vhdr->attr_file); | |
87 | inode->i_mapping->a_ops = &hfsplus_btree_aops; | |
88 | break; | |
89 | default: | |
90 | goto bad_inode; | |
91 | } | |
92 | ||
93 | return; | |
94 | ||
95 | bad_inode: | |
96 | make_bad_inode(inode); | |
97 | } | |
98 | ||
99 | static int hfsplus_write_inode(struct inode *inode, int unused) | |
100 | { | |
101 | struct hfsplus_vh *vhdr; | |
102 | int ret = 0; | |
103 | ||
104 | dprint(DBG_INODE, "hfsplus_write_inode: %lu\n", inode->i_ino); | |
105 | hfsplus_ext_write_extent(inode); | |
106 | if (inode->i_ino >= HFSPLUS_FIRSTUSER_CNID) { | |
107 | return hfsplus_cat_write_inode(inode); | |
108 | } | |
109 | vhdr = HFSPLUS_SB(inode->i_sb).s_vhdr; | |
110 | switch (inode->i_ino) { | |
111 | case HFSPLUS_ROOT_CNID: | |
112 | ret = hfsplus_cat_write_inode(inode); | |
113 | break; | |
114 | case HFSPLUS_EXT_CNID: | |
115 | if (vhdr->ext_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->ext_file); | |
120 | hfs_btree_write(HFSPLUS_SB(inode->i_sb).ext_tree); | |
121 | break; | |
122 | case HFSPLUS_CAT_CNID: | |
123 | if (vhdr->cat_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->cat_file); | |
128 | hfs_btree_write(HFSPLUS_SB(inode->i_sb).cat_tree); | |
129 | break; | |
130 | case HFSPLUS_ALLOC_CNID: | |
131 | if (vhdr->alloc_file.total_size != cpu_to_be64(inode->i_size)) { | |
132 | HFSPLUS_SB(inode->i_sb).flags |= HFSPLUS_SB_WRITEBACKUP; | |
133 | inode->i_sb->s_dirt = 1; | |
134 | } | |
135 | hfsplus_inode_write_fork(inode, &vhdr->alloc_file); | |
136 | break; | |
137 | case HFSPLUS_START_CNID: | |
138 | if (vhdr->start_file.total_size != cpu_to_be64(inode->i_size)) { | |
139 | HFSPLUS_SB(inode->i_sb).flags |= HFSPLUS_SB_WRITEBACKUP; | |
140 | inode->i_sb->s_dirt = 1; | |
141 | } | |
142 | hfsplus_inode_write_fork(inode, &vhdr->start_file); | |
143 | break; | |
144 | case HFSPLUS_ATTR_CNID: | |
145 | if (vhdr->attr_file.total_size != cpu_to_be64(inode->i_size)) { | |
146 | HFSPLUS_SB(inode->i_sb).flags |= HFSPLUS_SB_WRITEBACKUP; | |
147 | inode->i_sb->s_dirt = 1; | |
148 | } | |
149 | hfsplus_inode_write_fork(inode, &vhdr->attr_file); | |
150 | hfs_btree_write(HFSPLUS_SB(inode->i_sb).attr_tree); | |
151 | break; | |
152 | } | |
153 | return ret; | |
154 | } | |
155 | ||
156 | static void hfsplus_clear_inode(struct inode *inode) | |
157 | { | |
158 | dprint(DBG_INODE, "hfsplus_clear_inode: %lu\n", inode->i_ino); | |
159 | atomic_dec(&HFSPLUS_SB(inode->i_sb).inode_cnt); | |
160 | if (HFSPLUS_IS_RSRC(inode)) { | |
161 | HFSPLUS_I(HFSPLUS_I(inode).rsrc_inode).rsrc_inode = NULL; | |
162 | iput(HFSPLUS_I(inode).rsrc_inode); | |
163 | } | |
164 | hfsplus_inode_check(inode->i_sb); | |
165 | } | |
166 | ||
167 | static void hfsplus_write_super(struct super_block *sb) | |
168 | { | |
169 | struct hfsplus_vh *vhdr = HFSPLUS_SB(sb).s_vhdr; | |
170 | ||
171 | dprint(DBG_SUPER, "hfsplus_write_super\n"); | |
172 | sb->s_dirt = 0; | |
173 | if (sb->s_flags & MS_RDONLY) | |
174 | /* warn? */ | |
175 | return; | |
176 | ||
177 | vhdr->free_blocks = cpu_to_be32(HFSPLUS_SB(sb).free_blocks); | |
178 | vhdr->next_alloc = cpu_to_be32(HFSPLUS_SB(sb).next_alloc); | |
179 | vhdr->next_cnid = cpu_to_be32(HFSPLUS_SB(sb).next_cnid); | |
180 | vhdr->folder_count = cpu_to_be32(HFSPLUS_SB(sb).folder_count); | |
181 | vhdr->file_count = cpu_to_be32(HFSPLUS_SB(sb).file_count); | |
182 | ||
183 | mark_buffer_dirty(HFSPLUS_SB(sb).s_vhbh); | |
184 | if (HFSPLUS_SB(sb).flags & HFSPLUS_SB_WRITEBACKUP) { | |
185 | if (HFSPLUS_SB(sb).sect_count) { | |
186 | struct buffer_head *bh; | |
187 | u32 block, offset; | |
188 | ||
189 | block = HFSPLUS_SB(sb).blockoffset; | |
190 | block += (HFSPLUS_SB(sb).sect_count - 2) >> (sb->s_blocksize_bits - 9); | |
191 | offset = ((HFSPLUS_SB(sb).sect_count - 2) << 9) & (sb->s_blocksize - 1); | |
192 | printk("backup: %u,%u,%u,%u\n", HFSPLUS_SB(sb).blockoffset, | |
193 | HFSPLUS_SB(sb).sect_count, block, offset); | |
194 | bh = sb_bread(sb, block); | |
195 | if (bh) { | |
196 | vhdr = (struct hfsplus_vh *)(bh->b_data + offset); | |
197 | if (be16_to_cpu(vhdr->signature) == HFSPLUS_VOLHEAD_SIG) { | |
198 | memcpy(vhdr, HFSPLUS_SB(sb).s_vhdr, sizeof(*vhdr)); | |
199 | mark_buffer_dirty(bh); | |
200 | brelse(bh); | |
201 | } else | |
202 | printk("backup not found!\n"); | |
203 | } | |
204 | } | |
205 | HFSPLUS_SB(sb).flags &= ~HFSPLUS_SB_WRITEBACKUP; | |
206 | } | |
207 | } | |
208 | ||
209 | static void hfsplus_put_super(struct super_block *sb) | |
210 | { | |
211 | dprint(DBG_SUPER, "hfsplus_put_super\n"); | |
945b0920 CL |
212 | if (!sb->s_fs_info) |
213 | return; | |
214 | if (!(sb->s_flags & MS_RDONLY) && HFSPLUS_SB(sb).s_vhdr) { | |
1da177e4 LT |
215 | struct hfsplus_vh *vhdr = HFSPLUS_SB(sb).s_vhdr; |
216 | ||
217 | vhdr->modify_date = hfsp_now2mt(); | |
218 | vhdr->attributes |= cpu_to_be32(HFSPLUS_VOL_UNMNT); | |
219 | vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_INCNSTNT); | |
220 | mark_buffer_dirty(HFSPLUS_SB(sb).s_vhbh); | |
e39f07c8 | 221 | sync_dirty_buffer(HFSPLUS_SB(sb).s_vhbh); |
1da177e4 LT |
222 | } |
223 | ||
224 | hfs_btree_close(HFSPLUS_SB(sb).cat_tree); | |
225 | hfs_btree_close(HFSPLUS_SB(sb).ext_tree); | |
226 | iput(HFSPLUS_SB(sb).alloc_file); | |
227 | iput(HFSPLUS_SB(sb).hidden_dir); | |
228 | brelse(HFSPLUS_SB(sb).s_vhbh); | |
229 | if (HFSPLUS_SB(sb).nls) | |
230 | unload_nls(HFSPLUS_SB(sb).nls); | |
945b0920 CL |
231 | kfree(sb->s_fs_info); |
232 | sb->s_fs_info = NULL; | |
1da177e4 LT |
233 | } |
234 | ||
235 | static int hfsplus_statfs(struct super_block *sb, struct kstatfs *buf) | |
236 | { | |
237 | buf->f_type = HFSPLUS_SUPER_MAGIC; | |
238 | buf->f_bsize = sb->s_blocksize; | |
239 | buf->f_blocks = HFSPLUS_SB(sb).total_blocks << HFSPLUS_SB(sb).fs_shift; | |
240 | buf->f_bfree = HFSPLUS_SB(sb).free_blocks << HFSPLUS_SB(sb).fs_shift; | |
241 | buf->f_bavail = buf->f_bfree; | |
242 | buf->f_files = 0xFFFFFFFF; | |
243 | buf->f_ffree = 0xFFFFFFFF - HFSPLUS_SB(sb).next_cnid; | |
244 | buf->f_namelen = HFSPLUS_MAX_STRLEN; | |
245 | ||
246 | return 0; | |
247 | } | |
248 | ||
249 | static int hfsplus_remount(struct super_block *sb, int *flags, char *data) | |
250 | { | |
251 | if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) | |
252 | return 0; | |
253 | if (!(*flags & MS_RDONLY)) { | |
254 | struct hfsplus_vh *vhdr = HFSPLUS_SB(sb).s_vhdr; | |
255 | ||
256 | if (!(vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_UNMNT))) { | |
257 | printk("HFS+-fs warning: Filesystem was not cleanly unmounted, " | |
258 | "running fsck.hfsplus is recommended. leaving read-only.\n"); | |
259 | sb->s_flags |= MS_RDONLY; | |
260 | *flags |= MS_RDONLY; | |
261 | } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) { | |
262 | printk("HFS+-fs: Filesystem is marked locked, leaving read-only.\n"); | |
263 | sb->s_flags |= MS_RDONLY; | |
264 | *flags |= MS_RDONLY; | |
265 | } | |
266 | } | |
267 | return 0; | |
268 | } | |
269 | ||
270 | static struct super_operations hfsplus_sops = { | |
271 | .alloc_inode = hfsplus_alloc_inode, | |
272 | .destroy_inode = hfsplus_destroy_inode, | |
273 | .read_inode = hfsplus_read_inode, | |
274 | .write_inode = hfsplus_write_inode, | |
275 | .clear_inode = hfsplus_clear_inode, | |
276 | .put_super = hfsplus_put_super, | |
277 | .write_super = hfsplus_write_super, | |
278 | .statfs = hfsplus_statfs, | |
279 | .remount_fs = hfsplus_remount, | |
717dd80e | 280 | .show_options = hfsplus_show_options, |
1da177e4 LT |
281 | }; |
282 | ||
283 | static int hfsplus_fill_super(struct super_block *sb, void *data, int silent) | |
284 | { | |
285 | struct hfsplus_vh *vhdr; | |
286 | struct hfsplus_sb_info *sbi; | |
287 | hfsplus_cat_entry entry; | |
288 | struct hfs_find_data fd; | |
289 | struct inode *root; | |
290 | struct qstr str; | |
291 | struct nls_table *nls = NULL; | |
292 | int err = -EINVAL; | |
293 | ||
294 | sbi = kmalloc(sizeof(struct hfsplus_sb_info), GFP_KERNEL); | |
295 | if (!sbi) | |
296 | return -ENOMEM; | |
297 | ||
298 | memset(sbi, 0, sizeof(HFSPLUS_SB(sb))); | |
299 | sb->s_fs_info = sbi; | |
300 | INIT_HLIST_HEAD(&sbi->rsrc_inodes); | |
717dd80e RZ |
301 | hfsplus_fill_defaults(sbi); |
302 | if (!hfsplus_parse_options(data, sbi)) { | |
1da177e4 LT |
303 | if (!silent) |
304 | printk("HFS+-fs: unable to parse mount options\n"); | |
305 | err = -EINVAL; | |
306 | goto cleanup; | |
307 | } | |
308 | ||
309 | /* temporarily use utf8 to correctly find the hidden dir below */ | |
310 | nls = sbi->nls; | |
311 | sbi->nls = load_nls("utf8"); | |
312 | if (!nls) { | |
313 | printk("HFS+: unable to load nls for utf8\n"); | |
314 | err = -EINVAL; | |
315 | goto cleanup; | |
316 | } | |
317 | ||
318 | /* Grab the volume header */ | |
319 | if (hfsplus_read_wrapper(sb)) { | |
320 | if (!silent) | |
321 | printk("HFS+-fs: unable to find HFS+ superblock\n"); | |
322 | err = -EINVAL; | |
323 | goto cleanup; | |
324 | } | |
325 | vhdr = HFSPLUS_SB(sb).s_vhdr; | |
326 | ||
327 | /* Copy parts of the volume header into the superblock */ | |
328 | sb->s_magic = be16_to_cpu(vhdr->signature); | |
329 | if (be16_to_cpu(vhdr->version) != HFSPLUS_CURRENT_VERSION) { | |
330 | if (!silent) | |
331 | printk("HFS+-fs: wrong filesystem version\n"); | |
332 | goto cleanup; | |
333 | } | |
334 | HFSPLUS_SB(sb).total_blocks = be32_to_cpu(vhdr->total_blocks); | |
335 | HFSPLUS_SB(sb).free_blocks = be32_to_cpu(vhdr->free_blocks); | |
336 | HFSPLUS_SB(sb).next_alloc = be32_to_cpu(vhdr->next_alloc); | |
337 | HFSPLUS_SB(sb).next_cnid = be32_to_cpu(vhdr->next_cnid); | |
338 | HFSPLUS_SB(sb).file_count = be32_to_cpu(vhdr->file_count); | |
339 | HFSPLUS_SB(sb).folder_count = be32_to_cpu(vhdr->folder_count); | |
340 | HFSPLUS_SB(sb).data_clump_blocks = be32_to_cpu(vhdr->data_clump_sz) >> HFSPLUS_SB(sb).alloc_blksz_shift; | |
341 | if (!HFSPLUS_SB(sb).data_clump_blocks) | |
342 | HFSPLUS_SB(sb).data_clump_blocks = 1; | |
343 | HFSPLUS_SB(sb).rsrc_clump_blocks = be32_to_cpu(vhdr->rsrc_clump_sz) >> HFSPLUS_SB(sb).alloc_blksz_shift; | |
344 | if (!HFSPLUS_SB(sb).rsrc_clump_blocks) | |
345 | HFSPLUS_SB(sb).rsrc_clump_blocks = 1; | |
346 | ||
347 | /* Set up operations so we can load metadata */ | |
348 | sb->s_op = &hfsplus_sops; | |
349 | sb->s_maxbytes = MAX_LFS_FILESIZE; | |
350 | ||
351 | if (!(vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_UNMNT))) { | |
352 | if (!silent) | |
353 | printk("HFS+-fs warning: Filesystem was not cleanly unmounted, " | |
354 | "running fsck.hfsplus is recommended. mounting read-only.\n"); | |
355 | sb->s_flags |= MS_RDONLY; | |
356 | } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) { | |
357 | if (!silent) | |
358 | printk("HFS+-fs: Filesystem is marked locked, mounting read-only.\n"); | |
359 | sb->s_flags |= MS_RDONLY; | |
360 | } | |
361 | ||
362 | /* Load metadata objects (B*Trees) */ | |
363 | HFSPLUS_SB(sb).ext_tree = hfs_btree_open(sb, HFSPLUS_EXT_CNID); | |
364 | if (!HFSPLUS_SB(sb).ext_tree) { | |
365 | if (!silent) | |
366 | printk("HFS+-fs: failed to load extents file\n"); | |
367 | goto cleanup; | |
368 | } | |
369 | HFSPLUS_SB(sb).cat_tree = hfs_btree_open(sb, HFSPLUS_CAT_CNID); | |
370 | if (!HFSPLUS_SB(sb).cat_tree) { | |
371 | if (!silent) | |
372 | printk("HFS+-fs: failed to load catalog file\n"); | |
373 | goto cleanup; | |
374 | } | |
375 | ||
376 | HFSPLUS_SB(sb).alloc_file = iget(sb, HFSPLUS_ALLOC_CNID); | |
377 | if (!HFSPLUS_SB(sb).alloc_file) { | |
378 | if (!silent) | |
379 | printk("HFS+-fs: failed to load allocation file\n"); | |
380 | goto cleanup; | |
381 | } | |
382 | ||
383 | /* Load the root directory */ | |
384 | root = iget(sb, HFSPLUS_ROOT_CNID); | |
385 | sb->s_root = d_alloc_root(root); | |
386 | if (!sb->s_root) { | |
387 | if (!silent) | |
388 | printk("HFS+-fs: failed to load root directory\n"); | |
389 | iput(root); | |
390 | goto cleanup; | |
391 | } | |
392 | ||
393 | str.len = sizeof(HFSP_HIDDENDIR_NAME) - 1; | |
394 | str.name = HFSP_HIDDENDIR_NAME; | |
395 | hfs_find_init(HFSPLUS_SB(sb).cat_tree, &fd); | |
396 | hfsplus_cat_build_key(sb, fd.search_key, HFSPLUS_ROOT_CNID, &str); | |
397 | if (!hfs_brec_read(&fd, &entry, sizeof(entry))) { | |
398 | hfs_find_exit(&fd); | |
399 | if (entry.type != cpu_to_be16(HFSPLUS_FOLDER)) | |
400 | goto cleanup; | |
401 | HFSPLUS_SB(sb).hidden_dir = iget(sb, be32_to_cpu(entry.folder.id)); | |
402 | if (!HFSPLUS_SB(sb).hidden_dir) | |
403 | goto cleanup; | |
404 | } else | |
405 | hfs_find_exit(&fd); | |
406 | ||
407 | if (sb->s_flags & MS_RDONLY) | |
408 | goto out; | |
409 | ||
410 | /* H+LX == hfsplusutils, H+Lx == this driver, H+lx is unused | |
411 | * all three are registered with Apple for our use | |
412 | */ | |
413 | vhdr->last_mount_vers = cpu_to_be32(HFSP_MOUNT_VERSION); | |
414 | vhdr->modify_date = hfsp_now2mt(); | |
415 | vhdr->write_count = cpu_to_be32(be32_to_cpu(vhdr->write_count) + 1); | |
416 | vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_UNMNT); | |
417 | vhdr->attributes |= cpu_to_be32(HFSPLUS_VOL_INCNSTNT); | |
418 | mark_buffer_dirty(HFSPLUS_SB(sb).s_vhbh); | |
e39f07c8 | 419 | sync_dirty_buffer(HFSPLUS_SB(sb).s_vhbh); |
1da177e4 LT |
420 | |
421 | if (!HFSPLUS_SB(sb).hidden_dir) { | |
422 | printk("HFS+: create hidden dir...\n"); | |
423 | HFSPLUS_SB(sb).hidden_dir = hfsplus_new_inode(sb, S_IFDIR); | |
424 | hfsplus_create_cat(HFSPLUS_SB(sb).hidden_dir->i_ino, sb->s_root->d_inode, | |
425 | &str, HFSPLUS_SB(sb).hidden_dir); | |
426 | mark_inode_dirty(HFSPLUS_SB(sb).hidden_dir); | |
427 | } | |
428 | out: | |
429 | unload_nls(sbi->nls); | |
430 | sbi->nls = nls; | |
431 | return 0; | |
432 | ||
433 | cleanup: | |
434 | hfsplus_put_super(sb); | |
435 | if (nls) | |
436 | unload_nls(nls); | |
437 | return err; | |
438 | } | |
439 | ||
440 | MODULE_AUTHOR("Brad Boyer"); | |
441 | MODULE_DESCRIPTION("Extended Macintosh Filesystem"); | |
442 | MODULE_LICENSE("GPL"); | |
443 | ||
444 | static kmem_cache_t *hfsplus_inode_cachep; | |
445 | ||
446 | static struct inode *hfsplus_alloc_inode(struct super_block *sb) | |
447 | { | |
448 | struct hfsplus_inode_info *i; | |
449 | ||
450 | i = kmem_cache_alloc(hfsplus_inode_cachep, SLAB_KERNEL); | |
451 | return i ? &i->vfs_inode : NULL; | |
452 | } | |
453 | ||
454 | static void hfsplus_destroy_inode(struct inode *inode) | |
455 | { | |
456 | kmem_cache_free(hfsplus_inode_cachep, &HFSPLUS_I(inode)); | |
457 | } | |
458 | ||
459 | #define HFSPLUS_INODE_SIZE sizeof(struct hfsplus_inode_info) | |
460 | ||
461 | static struct super_block *hfsplus_get_sb(struct file_system_type *fs_type, | |
462 | int flags, const char *dev_name, void *data) | |
463 | { | |
464 | return get_sb_bdev(fs_type, flags, dev_name, data, hfsplus_fill_super); | |
465 | } | |
466 | ||
467 | static struct file_system_type hfsplus_fs_type = { | |
468 | .owner = THIS_MODULE, | |
469 | .name = "hfsplus", | |
470 | .get_sb = hfsplus_get_sb, | |
471 | .kill_sb = kill_block_super, | |
472 | .fs_flags = FS_REQUIRES_DEV, | |
473 | }; | |
474 | ||
475 | static void hfsplus_init_once(void *p, kmem_cache_t *cachep, unsigned long flags) | |
476 | { | |
477 | struct hfsplus_inode_info *i = p; | |
478 | ||
479 | if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) == SLAB_CTOR_CONSTRUCTOR) | |
480 | inode_init_once(&i->vfs_inode); | |
481 | } | |
482 | ||
483 | static int __init init_hfsplus_fs(void) | |
484 | { | |
485 | int err; | |
486 | ||
487 | hfsplus_inode_cachep = kmem_cache_create("hfsplus_icache", | |
488 | HFSPLUS_INODE_SIZE, 0, SLAB_HWCACHE_ALIGN, | |
489 | hfsplus_init_once, NULL); | |
490 | if (!hfsplus_inode_cachep) | |
491 | return -ENOMEM; | |
492 | err = register_filesystem(&hfsplus_fs_type); | |
493 | if (err) | |
494 | kmem_cache_destroy(hfsplus_inode_cachep); | |
495 | return err; | |
496 | } | |
497 | ||
498 | static void __exit exit_hfsplus_fs(void) | |
499 | { | |
500 | unregister_filesystem(&hfsplus_fs_type); | |
501 | if (kmem_cache_destroy(hfsplus_inode_cachep)) | |
502 | printk(KERN_INFO "hfsplus_inode_cache: not all structures were freed\n"); | |
503 | } | |
504 | ||
505 | module_init(init_hfsplus_fs) | |
506 | module_exit(exit_hfsplus_fs) |