usb: r8a66597-hcd: Change mistake of the outsw function
[linux/fpc-iii.git] / fs / hfsplus / super.c
blob3b55c050c74274710fa95cad827edf6abd6b8316
1 /*
2 * linux/fs/hfsplus/super.c
4 * Copyright (C) 2001
5 * Brad Boyer (flar@allandria.com)
6 * (C) 2003 Ardis Technologies <roman@ardistech.com>
8 */
10 #include <linux/module.h>
11 #include <linux/init.h>
12 #include <linux/pagemap.h>
13 #include <linux/fs.h>
14 #include <linux/slab.h>
15 #include <linux/smp_lock.h>
16 #include <linux/vfs.h>
17 #include <linux/nls.h>
19 static struct inode *hfsplus_alloc_inode(struct super_block *sb);
20 static void hfsplus_destroy_inode(struct inode *inode);
22 #include "hfsplus_fs.h"
24 struct inode *hfsplus_iget(struct super_block *sb, unsigned long ino)
26 struct hfs_find_data fd;
27 struct hfsplus_vh *vhdr;
28 struct inode *inode;
29 long err = -EIO;
31 inode = iget_locked(sb, ino);
32 if (!inode)
33 return ERR_PTR(-ENOMEM);
34 if (!(inode->i_state & I_NEW))
35 return inode;
37 INIT_LIST_HEAD(&HFSPLUS_I(inode).open_dir_list);
38 mutex_init(&HFSPLUS_I(inode).extents_lock);
39 HFSPLUS_I(inode).flags = 0;
40 HFSPLUS_I(inode).rsrc_inode = NULL;
41 atomic_set(&HFSPLUS_I(inode).opencnt, 0);
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;
52 goto done;
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;
81 done:
82 unlock_new_inode(inode);
83 return inode;
85 bad_inode:
86 iget_failed(inode);
87 return ERR_PTR(err);
90 static int hfsplus_write_inode(struct inode *inode,
91 struct writeback_control *wbc)
93 struct hfsplus_vh *vhdr;
94 int ret = 0;
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);
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;
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;
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;
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;
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;
141 hfsplus_inode_write_fork(inode, &vhdr->attr_file);
142 hfs_btree_write(HFSPLUS_SB(inode->i_sb).attr_tree);
143 break;
145 return ret;
148 static void hfsplus_evict_inode(struct inode *inode)
150 dprint(DBG_INODE, "hfsplus_evict_inode: %lu\n", inode->i_ino);
151 truncate_inode_pages(&inode->i_data, 0);
152 end_writeback(inode);
153 if (HFSPLUS_IS_RSRC(inode)) {
154 HFSPLUS_I(HFSPLUS_I(inode).rsrc_inode).rsrc_inode = NULL;
155 iput(HFSPLUS_I(inode).rsrc_inode);
159 int hfsplus_sync_fs(struct super_block *sb, int wait)
161 struct hfsplus_vh *vhdr = HFSPLUS_SB(sb).s_vhdr;
163 dprint(DBG_SUPER, "hfsplus_write_super\n");
165 lock_super(sb);
166 sb->s_dirt = 0;
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);
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;
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);
183 printk(KERN_DEBUG "hfs: backup: %u,%u,%u,%u\n", HFSPLUS_SB(sb).blockoffset,
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
193 printk(KERN_WARNING "hfs: backup not found!\n");
196 HFSPLUS_SB(sb).flags &= ~HFSPLUS_SB_WRITEBACKUP;
198 unlock_super(sb);
199 return 0;
202 static void hfsplus_write_super(struct super_block *sb)
204 if (!(sb->s_flags & MS_RDONLY))
205 hfsplus_sync_fs(sb, 1);
206 else
207 sb->s_dirt = 0;
210 static void hfsplus_put_super(struct super_block *sb)
212 dprint(DBG_SUPER, "hfsplus_put_super\n");
213 if (!sb->s_fs_info)
214 return;
216 lock_kernel();
218 if (sb->s_dirt)
219 hfsplus_write_super(sb);
220 if (!(sb->s_flags & MS_RDONLY) && HFSPLUS_SB(sb).s_vhdr) {
221 struct hfsplus_vh *vhdr = HFSPLUS_SB(sb).s_vhdr;
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);
227 sync_dirty_buffer(HFSPLUS_SB(sb).s_vhbh);
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);
235 unload_nls(HFSPLUS_SB(sb).nls);
236 kfree(sb->s_fs_info);
237 sb->s_fs_info = NULL;
239 unlock_kernel();
242 static int hfsplus_statfs(struct dentry *dentry, struct kstatfs *buf)
244 struct super_block *sb = dentry->d_sb;
245 u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
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;
254 buf->f_fsid.val[0] = (u32)id;
255 buf->f_fsid.val[1] = (u32)(id >> 32);
256 buf->f_namelen = HFSPLUS_MAX_STRLEN;
258 return 0;
261 static int hfsplus_remount(struct super_block *sb, int *flags, char *data)
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;
267 struct hfsplus_sb_info sbi;
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;
274 if (!(vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_UNMNT))) {
275 printk(KERN_WARNING "hfs: filesystem was not cleanly unmounted, "
276 "running fsck.hfsplus is recommended. leaving read-only.\n");
277 sb->s_flags |= MS_RDONLY;
278 *flags |= MS_RDONLY;
279 } else if (sbi.flags & HFSPLUS_SB_FORCE) {
280 /* nothing */
281 } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) {
282 printk(KERN_WARNING "hfs: filesystem is marked locked, leaving read-only.\n");
283 sb->s_flags |= MS_RDONLY;
284 *flags |= MS_RDONLY;
285 } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_JOURNALED)) {
286 printk(KERN_WARNING "hfs: filesystem is marked journaled, leaving read-only.\n");
287 sb->s_flags |= MS_RDONLY;
288 *flags |= MS_RDONLY;
291 return 0;
294 static const struct super_operations hfsplus_sops = {
295 .alloc_inode = hfsplus_alloc_inode,
296 .destroy_inode = hfsplus_destroy_inode,
297 .write_inode = hfsplus_write_inode,
298 .evict_inode = hfsplus_evict_inode,
299 .put_super = hfsplus_put_super,
300 .write_super = hfsplus_write_super,
301 .sync_fs = hfsplus_sync_fs,
302 .statfs = hfsplus_statfs,
303 .remount_fs = hfsplus_remount,
304 .show_options = hfsplus_show_options,
307 static int hfsplus_fill_super(struct super_block *sb, void *data, int silent)
309 struct hfsplus_vh *vhdr;
310 struct hfsplus_sb_info *sbi;
311 hfsplus_cat_entry entry;
312 struct hfs_find_data fd;
313 struct inode *root, *inode;
314 struct qstr str;
315 struct nls_table *nls = NULL;
316 int err = -EINVAL;
318 sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
319 if (!sbi)
320 return -ENOMEM;
322 sb->s_fs_info = sbi;
323 INIT_HLIST_HEAD(&sbi->rsrc_inodes);
324 hfsplus_fill_defaults(sbi);
325 if (!hfsplus_parse_options(data, sbi)) {
326 printk(KERN_ERR "hfs: unable to parse mount options\n");
327 err = -EINVAL;
328 goto cleanup;
331 /* temporarily use utf8 to correctly find the hidden dir below */
332 nls = sbi->nls;
333 sbi->nls = load_nls("utf8");
334 if (!sbi->nls) {
335 printk(KERN_ERR "hfs: unable to load nls for utf8\n");
336 err = -EINVAL;
337 goto cleanup;
340 /* Grab the volume header */
341 if (hfsplus_read_wrapper(sb)) {
342 if (!silent)
343 printk(KERN_WARNING "hfs: unable to find HFS+ superblock\n");
344 err = -EINVAL;
345 goto cleanup;
347 vhdr = HFSPLUS_SB(sb).s_vhdr;
349 /* Copy parts of the volume header into the superblock */
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) {
353 printk(KERN_ERR "hfs: wrong filesystem version\n");
354 goto cleanup;
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;
369 /* Set up operations so we can load metadata */
370 sb->s_op = &hfsplus_sops;
371 sb->s_maxbytes = MAX_LFS_FILESIZE;
373 if (!(vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_UNMNT))) {
374 printk(KERN_WARNING "hfs: Filesystem was not cleanly unmounted, "
375 "running fsck.hfsplus is recommended. mounting read-only.\n");
376 sb->s_flags |= MS_RDONLY;
377 } else if (sbi->flags & HFSPLUS_SB_FORCE) {
378 /* nothing */
379 } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) {
380 printk(KERN_WARNING "hfs: Filesystem is marked locked, mounting read-only.\n");
381 sb->s_flags |= MS_RDONLY;
382 } else if ((vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_JOURNALED)) && !(sb->s_flags & MS_RDONLY)) {
383 printk(KERN_WARNING "hfs: write access to a journaled filesystem is not supported, "
384 "use the force option at your own risk, mounting read-only.\n");
385 sb->s_flags |= MS_RDONLY;
387 sbi->flags &= ~HFSPLUS_SB_FORCE;
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) {
392 printk(KERN_ERR "hfs: failed to load extents file\n");
393 goto cleanup;
395 HFSPLUS_SB(sb).cat_tree = hfs_btree_open(sb, HFSPLUS_CAT_CNID);
396 if (!HFSPLUS_SB(sb).cat_tree) {
397 printk(KERN_ERR "hfs: failed to load catalog file\n");
398 goto cleanup;
401 inode = hfsplus_iget(sb, HFSPLUS_ALLOC_CNID);
402 if (IS_ERR(inode)) {
403 printk(KERN_ERR "hfs: failed to load allocation file\n");
404 err = PTR_ERR(inode);
405 goto cleanup;
407 HFSPLUS_SB(sb).alloc_file = inode;
409 /* Load the root directory */
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;
416 sb->s_root = d_alloc_root(root);
417 if (!sb->s_root) {
418 iput(root);
419 err = -ENOMEM;
420 goto cleanup;
422 sb->s_root->d_op = &hfsplus_dentry_operations;
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;
432 inode = hfsplus_iget(sb, be32_to_cpu(entry.folder.id));
433 if (IS_ERR(inode)) {
434 err = PTR_ERR(inode);
435 goto cleanup;
437 HFSPLUS_SB(sb).hidden_dir = inode;
438 } else
439 hfs_find_exit(&fd);
441 if (sb->s_flags & MS_RDONLY)
442 goto out;
444 /* H+LX == hfsplusutils, H+Lx == this driver, H+lx is unused
445 * all three are registered with Apple for our use
447 vhdr->last_mount_vers = cpu_to_be32(HFSP_MOUNT_VERSION);
448 vhdr->modify_date = hfsp_now2mt();
449 be32_add_cpu(&vhdr->write_count, 1);
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);
453 sync_dirty_buffer(HFSPLUS_SB(sb).s_vhbh);
455 if (!HFSPLUS_SB(sb).hidden_dir) {
456 printk(KERN_DEBUG "hfs: create hidden dir...\n");
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);
462 out:
463 unload_nls(sbi->nls);
464 sbi->nls = nls;
465 return 0;
467 cleanup:
468 hfsplus_put_super(sb);
469 unload_nls(nls);
470 return err;
473 MODULE_AUTHOR("Brad Boyer");
474 MODULE_DESCRIPTION("Extended Macintosh Filesystem");
475 MODULE_LICENSE("GPL");
477 static struct kmem_cache *hfsplus_inode_cachep;
479 static struct inode *hfsplus_alloc_inode(struct super_block *sb)
481 struct hfsplus_inode_info *i;
483 i = kmem_cache_alloc(hfsplus_inode_cachep, GFP_KERNEL);
484 return i ? &i->vfs_inode : NULL;
487 static void hfsplus_destroy_inode(struct inode *inode)
489 kmem_cache_free(hfsplus_inode_cachep, &HFSPLUS_I(inode));
492 #define HFSPLUS_INODE_SIZE sizeof(struct hfsplus_inode_info)
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)
498 return get_sb_bdev(fs_type, flags, dev_name, data, hfsplus_fill_super,
499 mnt);
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,
510 static void hfsplus_init_once(void *p)
512 struct hfsplus_inode_info *i = p;
514 inode_init_once(&i->vfs_inode);
517 static int __init init_hfsplus_fs(void)
519 int err;
521 hfsplus_inode_cachep = kmem_cache_create("hfsplus_icache",
522 HFSPLUS_INODE_SIZE, 0, SLAB_HWCACHE_ALIGN,
523 hfsplus_init_once);
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;
532 static void __exit exit_hfsplus_fs(void)
534 unregister_filesystem(&hfsplus_fs_type);
535 kmem_cache_destroy(hfsplus_inode_cachep);
538 module_init(init_hfsplus_fs)
539 module_exit(exit_hfsplus_fs)