2 * linux/fs/hfsplus/super.c
5 * Brad Boyer (flar@allandria.com)
6 * (C) 2003 Ardis Technologies <roman@ardistech.com>
10 #include <linux/config.h>
11 #include <linux/module.h>
12 #include <linux/init.h>
13 #include <linux/pagemap.h>
15 #include <linux/sched.h>
16 #include <linux/slab.h>
17 #include <linux/version.h>
18 #include <linux/vfs.h>
20 static struct inode
*hfsplus_alloc_inode(struct super_block
*sb
);
21 static void hfsplus_destroy_inode(struct inode
*inode
);
23 #include "hfsplus_fs.h"
25 void hfsplus_inode_check(struct super_block
*sb
)
28 u32 cnt
= atomic_read(&HFSPLUS_SB(sb
).inode_cnt
);
29 u32 last_cnt
= HFSPLUS_SB(sb
).last_inode_cnt
;
31 if (cnt
<= (last_cnt
/ 2) ||
32 cnt
>= (last_cnt
* 2)) {
33 HFSPLUS_SB(sb
).last_inode_cnt
= cnt
;
34 printk("inode_check: %u,%u,%u\n", cnt
, last_cnt
,
35 HFSPLUS_SB(sb
).cat_tree
? HFSPLUS_SB(sb
).cat_tree
->node_hash_cnt
: 0);
40 static void hfsplus_read_inode(struct inode
*inode
)
42 struct hfs_find_data fd
;
43 struct hfsplus_vh
*vhdr
;
46 atomic_inc(&HFSPLUS_SB(inode
->i_sb
).inode_cnt
);
47 hfsplus_inode_check(inode
->i_sb
);
48 INIT_LIST_HEAD(&HFSPLUS_I(inode
).open_dir_list
);
49 init_MUTEX(&HFSPLUS_I(inode
).extents_lock
);
50 HFSPLUS_I(inode
).flags
= 0;
51 HFSPLUS_I(inode
).rsrc_inode
= NULL
;
53 if (inode
->i_ino
>= HFSPLUS_FIRSTUSER_CNID
) {
55 hfs_find_init(HFSPLUS_SB(inode
->i_sb
).cat_tree
, &fd
);
56 err
= hfsplus_find_cat(inode
->i_sb
, inode
->i_ino
, &fd
);
58 err
= hfsplus_cat_read_inode(inode
, &fd
);
64 vhdr
= HFSPLUS_SB(inode
->i_sb
).s_vhdr
;
65 switch(inode
->i_ino
) {
66 case HFSPLUS_ROOT_CNID
:
68 case HFSPLUS_EXT_CNID
:
69 hfsplus_inode_read_fork(inode
, &vhdr
->ext_file
);
70 inode
->i_mapping
->a_ops
= &hfsplus_btree_aops
;
72 case HFSPLUS_CAT_CNID
:
73 hfsplus_inode_read_fork(inode
, &vhdr
->cat_file
);
74 inode
->i_mapping
->a_ops
= &hfsplus_btree_aops
;
76 case HFSPLUS_ALLOC_CNID
:
77 hfsplus_inode_read_fork(inode
, &vhdr
->alloc_file
);
78 inode
->i_mapping
->a_ops
= &hfsplus_aops
;
80 case HFSPLUS_START_CNID
:
81 hfsplus_inode_read_fork(inode
, &vhdr
->start_file
);
83 case HFSPLUS_ATTR_CNID
:
84 hfsplus_inode_read_fork(inode
, &vhdr
->attr_file
);
85 inode
->i_mapping
->a_ops
= &hfsplus_btree_aops
;
94 make_bad_inode(inode
);
97 int hfsplus_write_inode(struct inode
*inode
, int unused
)
99 struct hfsplus_vh
*vhdr
;
102 dprint(DBG_INODE
, "hfsplus_write_inode: %lu\n", inode
->i_ino
);
103 hfsplus_ext_write_extent(inode
);
104 if (inode
->i_ino
>= HFSPLUS_FIRSTUSER_CNID
) {
105 return hfsplus_cat_write_inode(inode
);
107 vhdr
= HFSPLUS_SB(inode
->i_sb
).s_vhdr
;
108 switch (inode
->i_ino
) {
109 case HFSPLUS_ROOT_CNID
:
110 ret
= hfsplus_cat_write_inode(inode
);
112 case HFSPLUS_EXT_CNID
:
113 if (vhdr
->ext_file
.total_size
!= cpu_to_be64(inode
->i_size
)) {
114 HFSPLUS_SB(inode
->i_sb
).flags
|= HFSPLUS_SB_WRITEBACKUP
;
115 inode
->i_sb
->s_dirt
= 1;
117 hfsplus_inode_write_fork(inode
, &vhdr
->ext_file
);
118 hfs_btree_write(HFSPLUS_SB(inode
->i_sb
).ext_tree
);
120 case HFSPLUS_CAT_CNID
:
121 if (vhdr
->cat_file
.total_size
!= cpu_to_be64(inode
->i_size
)) {
122 HFSPLUS_SB(inode
->i_sb
).flags
|= HFSPLUS_SB_WRITEBACKUP
;
123 inode
->i_sb
->s_dirt
= 1;
125 hfsplus_inode_write_fork(inode
, &vhdr
->cat_file
);
126 hfs_btree_write(HFSPLUS_SB(inode
->i_sb
).cat_tree
);
128 case HFSPLUS_ALLOC_CNID
:
129 if (vhdr
->alloc_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;
133 hfsplus_inode_write_fork(inode
, &vhdr
->alloc_file
);
135 case HFSPLUS_START_CNID
:
136 if (vhdr
->start_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;
140 hfsplus_inode_write_fork(inode
, &vhdr
->start_file
);
142 case HFSPLUS_ATTR_CNID
:
143 if (vhdr
->attr_file
.total_size
!= cpu_to_be64(inode
->i_size
)) {
144 HFSPLUS_SB(inode
->i_sb
).flags
|= HFSPLUS_SB_WRITEBACKUP
;
145 inode
->i_sb
->s_dirt
= 1;
147 hfsplus_inode_write_fork(inode
, &vhdr
->attr_file
);
148 hfs_btree_write(HFSPLUS_SB(inode
->i_sb
).attr_tree
);
154 static void hfsplus_clear_inode(struct inode
*inode
)
156 dprint(DBG_INODE
, "hfsplus_clear_inode: %lu\n", inode
->i_ino
);
157 atomic_dec(&HFSPLUS_SB(inode
->i_sb
).inode_cnt
);
158 if (HFSPLUS_IS_RSRC(inode
)) {
159 HFSPLUS_I(HFSPLUS_I(inode
).rsrc_inode
).rsrc_inode
= NULL
;
160 iput(HFSPLUS_I(inode
).rsrc_inode
);
162 hfsplus_inode_check(inode
->i_sb
);
165 static void hfsplus_write_super(struct super_block
*sb
)
167 struct hfsplus_vh
*vhdr
= HFSPLUS_SB(sb
).s_vhdr
;
169 dprint(DBG_SUPER
, "hfsplus_write_super\n");
171 if (sb
->s_flags
& MS_RDONLY
)
175 vhdr
->free_blocks
= cpu_to_be32(HFSPLUS_SB(sb
).free_blocks
);
176 vhdr
->next_alloc
= cpu_to_be32(HFSPLUS_SB(sb
).next_alloc
);
177 vhdr
->next_cnid
= cpu_to_be32(HFSPLUS_SB(sb
).next_cnid
);
178 vhdr
->folder_count
= cpu_to_be32(HFSPLUS_SB(sb
).folder_count
);
179 vhdr
->file_count
= cpu_to_be32(HFSPLUS_SB(sb
).file_count
);
181 mark_buffer_dirty(HFSPLUS_SB(sb
).s_vhbh
);
182 if (HFSPLUS_SB(sb
).flags
& HFSPLUS_SB_WRITEBACKUP
) {
183 if (HFSPLUS_SB(sb
).sect_count
) {
184 struct buffer_head
*bh
;
187 block
= HFSPLUS_SB(sb
).blockoffset
;
188 block
+= (HFSPLUS_SB(sb
).sect_count
- 2) >> (sb
->s_blocksize_bits
- 9);
189 offset
= ((HFSPLUS_SB(sb
).sect_count
- 2) << 9) & (sb
->s_blocksize
- 1);
190 printk("backup: %u,%u,%u,%u\n", HFSPLUS_SB(sb
).blockoffset
,
191 HFSPLUS_SB(sb
).sect_count
, block
, offset
);
192 bh
= sb_bread(sb
, block
);
194 vhdr
= (struct hfsplus_vh
*)(bh
->b_data
+ offset
);
195 if (be16_to_cpu(vhdr
->signature
) == HFSPLUS_VOLHEAD_SIG
) {
196 memcpy(vhdr
, HFSPLUS_SB(sb
).s_vhdr
, sizeof(*vhdr
));
197 mark_buffer_dirty(bh
);
200 printk("backup not found!\n");
203 HFSPLUS_SB(sb
).flags
&= ~HFSPLUS_SB_WRITEBACKUP
;
207 static void hfsplus_put_super(struct super_block
*sb
)
209 dprint(DBG_SUPER
, "hfsplus_put_super\n");
210 if (!(sb
->s_flags
& MS_RDONLY
)) {
211 struct hfsplus_vh
*vhdr
= HFSPLUS_SB(sb
).s_vhdr
;
213 vhdr
->modify_date
= hfsp_now2mt();
214 vhdr
->attributes
|= cpu_to_be32(HFSPLUS_VOL_UNMNT
);
215 vhdr
->attributes
&= cpu_to_be32(~HFSPLUS_VOL_INCNSTNT
);
216 mark_buffer_dirty(HFSPLUS_SB(sb
).s_vhbh
);
217 ll_rw_block(WRITE
, 1, &HFSPLUS_SB(sb
).s_vhbh
);
218 wait_on_buffer(HFSPLUS_SB(sb
).s_vhbh
);
221 hfs_btree_close(HFSPLUS_SB(sb
).cat_tree
);
222 hfs_btree_close(HFSPLUS_SB(sb
).ext_tree
);
223 iput(HFSPLUS_SB(sb
).alloc_file
);
224 iput(HFSPLUS_SB(sb
).hidden_dir
);
225 brelse(HFSPLUS_SB(sb
).s_vhbh
);
228 static int hfsplus_statfs(struct super_block
*sb
, struct kstatfs
*buf
)
230 buf
->f_type
= HFSPLUS_SUPER_MAGIC
;
231 buf
->f_bsize
= sb
->s_blocksize
;
232 buf
->f_blocks
= HFSPLUS_SB(sb
).total_blocks
<< HFSPLUS_SB(sb
).fs_shift
;
233 buf
->f_bfree
= HFSPLUS_SB(sb
).free_blocks
<< HFSPLUS_SB(sb
).fs_shift
;
234 buf
->f_bavail
= buf
->f_bfree
;
235 buf
->f_files
= 0xFFFFFFFF;
236 buf
->f_ffree
= 0xFFFFFFFF - HFSPLUS_SB(sb
).next_cnid
;
237 buf
->f_namelen
= HFSPLUS_MAX_STRLEN
;
242 int hfsplus_remount(struct super_block
*sb
, int *flags
, char *data
)
244 if ((*flags
& MS_RDONLY
) == (sb
->s_flags
& MS_RDONLY
))
246 if (!(*flags
& MS_RDONLY
)) {
247 struct hfsplus_vh
*vhdr
= HFSPLUS_SB(sb
).s_vhdr
;
249 if ((vhdr
->attributes
& cpu_to_be32(HFSPLUS_VOL_INCNSTNT
)) ||
250 !(vhdr
->attributes
& cpu_to_be32(HFSPLUS_VOL_UNMNT
))) {
251 printk("HFS+-fs warning: Filesystem was not cleanly unmounted, "
252 "running fsck.hfsplus is recommended. leaving read-only.\n");
253 sb
->s_flags
|= MS_RDONLY
;
255 } else if (vhdr
->attributes
& cpu_to_be32(HFSPLUS_VOL_SOFTLOCK
)) {
256 printk("HFS+-fs: Filesystem is marked locked, leaving read-only.\n");
257 sb
->s_flags
|= MS_RDONLY
;
264 static struct super_operations hfsplus_sops
= {
265 .alloc_inode
= hfsplus_alloc_inode
,
266 .destroy_inode
= hfsplus_destroy_inode
,
267 .read_inode
= hfsplus_read_inode
,
268 .write_inode
= hfsplus_write_inode
,
269 .clear_inode
= hfsplus_clear_inode
,
270 .put_super
= hfsplus_put_super
,
271 .write_super
= hfsplus_write_super
,
272 .statfs
= hfsplus_statfs
,
273 .remount_fs
= hfsplus_remount
,
276 static int hfsplus_fill_super(struct super_block
*sb
, void *data
, int silent
)
278 struct hfsplus_vh
*vhdr
;
279 struct hfsplus_sb_info
*sbi
;
280 hfsplus_cat_entry entry
;
281 struct hfs_find_data fd
;
286 sbi
= kmalloc(sizeof(struct hfsplus_sb_info
), GFP_KERNEL
);
291 memset(sbi
, 0, sizeof(HFSPLUS_SB(sb
)));
293 INIT_HLIST_HEAD(&sbi
->rsrc_inodes
);
295 if (!parse_options(data
, sbi
)) {
297 printk("HFS+-fs: unable to parse mount options\n");
302 /* Grab the volume header */
303 if (hfsplus_read_wrapper(sb
)) {
305 printk("HFS+-fs: unable to find HFS+ superblock\n");
309 vhdr
= HFSPLUS_SB(sb
).s_vhdr
;
311 /* Copy parts of the volume header into the superblock */
312 sb
->s_magic
= be16_to_cpu(vhdr
->signature
);
313 if (be16_to_cpu(vhdr
->version
) != HFSPLUS_CURRENT_VERSION
) {
315 printk("HFS+-fs: wrong filesystem version\n");
318 HFSPLUS_SB(sb
).total_blocks
= be32_to_cpu(vhdr
->total_blocks
);
319 HFSPLUS_SB(sb
).free_blocks
= be32_to_cpu(vhdr
->free_blocks
);
320 HFSPLUS_SB(sb
).next_alloc
= be32_to_cpu(vhdr
->next_alloc
);
321 HFSPLUS_SB(sb
).next_cnid
= be32_to_cpu(vhdr
->next_cnid
);
322 HFSPLUS_SB(sb
).file_count
= be32_to_cpu(vhdr
->file_count
);
323 HFSPLUS_SB(sb
).folder_count
= be32_to_cpu(vhdr
->folder_count
);
324 HFSPLUS_SB(sb
).data_clump_blocks
= be32_to_cpu(vhdr
->data_clump_sz
) >> HFSPLUS_SB(sb
).alloc_blksz_shift
;
325 if (!HFSPLUS_SB(sb
).data_clump_blocks
)
326 HFSPLUS_SB(sb
).data_clump_blocks
= 1;
327 HFSPLUS_SB(sb
).rsrc_clump_blocks
= be32_to_cpu(vhdr
->rsrc_clump_sz
) >> HFSPLUS_SB(sb
).alloc_blksz_shift
;
328 if (!HFSPLUS_SB(sb
).rsrc_clump_blocks
)
329 HFSPLUS_SB(sb
).rsrc_clump_blocks
= 1;
331 /* Set up operations so we can load metadata */
332 sb
->s_op
= &hfsplus_sops
;
333 sb
->s_maxbytes
= MAX_LFS_FILESIZE
;
335 if ((vhdr
->attributes
& cpu_to_be32(HFSPLUS_VOL_INCNSTNT
)) ||
336 !(vhdr
->attributes
& cpu_to_be32(HFSPLUS_VOL_UNMNT
))) {
338 printk("HFS+-fs warning: Filesystem was not cleanly unmounted, "
339 "running fsck.hfsplus is recommended. mounting read-only.\n");
340 sb
->s_flags
|= MS_RDONLY
;
341 } else if (vhdr
->attributes
& cpu_to_be32(HFSPLUS_VOL_SOFTLOCK
)) {
343 printk("HFS+-fs: Filesystem is marked locked, mounting read-only.\n");
344 sb
->s_flags
|= MS_RDONLY
;
347 /* Load metadata objects (B*Trees) */
348 HFSPLUS_SB(sb
).ext_tree
= hfs_btree_open(sb
, HFSPLUS_EXT_CNID
);
349 if (!HFSPLUS_SB(sb
).ext_tree
) {
351 printk("HFS+-fs: failed to load extents file\n");
354 HFSPLUS_SB(sb
).cat_tree
= hfs_btree_open(sb
, HFSPLUS_CAT_CNID
);
355 if (!HFSPLUS_SB(sb
).cat_tree
) {
357 printk("HFS+-fs: failed to load catalog file\n");
361 HFSPLUS_SB(sb
).alloc_file
= iget(sb
, HFSPLUS_ALLOC_CNID
);
362 if (!HFSPLUS_SB(sb
).alloc_file
) {
364 printk("HFS+-fs: failed to load allocation file\n");
368 /* Load the root directory */
369 root
= iget(sb
, HFSPLUS_ROOT_CNID
);
370 sb
->s_root
= d_alloc_root(root
);
373 printk("HFS+-fs: failed to load root directory\n");
378 str
.len
= sizeof(HFSP_HIDDENDIR_NAME
) - 1;
379 str
.name
= HFSP_HIDDENDIR_NAME
;
380 hfs_find_init(HFSPLUS_SB(sb
).cat_tree
, &fd
);
381 hfsplus_cat_build_key(fd
.search_key
, HFSPLUS_ROOT_CNID
, &str
);
382 if (!hfs_brec_read(&fd
, &entry
, sizeof(entry
))) {
384 if (entry
.type
!= cpu_to_be16(HFSPLUS_FOLDER
))
386 HFSPLUS_SB(sb
).hidden_dir
= iget(sb
, be32_to_cpu(entry
.folder
.id
));
387 if (!HFSPLUS_SB(sb
).hidden_dir
)
392 if (sb
->s_flags
& MS_RDONLY
)
395 /* H+LX == hfsplusutils, H+Lx == this driver, H+lx is unused
396 * all three are registered with Apple for our use
398 vhdr
->last_mount_vers
= cpu_to_be32(HFSP_MOUNT_VERSION
);
399 vhdr
->modify_date
= hfsp_now2mt();
400 vhdr
->write_count
= cpu_to_be32(be32_to_cpu(vhdr
->write_count
) + 1);
401 vhdr
->attributes
&= cpu_to_be32(~HFSPLUS_VOL_UNMNT
);
402 vhdr
->attributes
|= cpu_to_be32(HFSPLUS_VOL_INCNSTNT
);
403 mark_buffer_dirty(HFSPLUS_SB(sb
).s_vhbh
);
404 ll_rw_block(WRITE
, 1, &HFSPLUS_SB(sb
).s_vhbh
);
405 wait_on_buffer(HFSPLUS_SB(sb
).s_vhbh
);
407 if (!HFSPLUS_SB(sb
).hidden_dir
) {
408 printk("HFS+: create hidden dir...\n");
409 HFSPLUS_SB(sb
).hidden_dir
= hfsplus_new_inode(sb
, S_IFDIR
);
410 hfsplus_create_cat(HFSPLUS_SB(sb
).hidden_dir
->i_ino
, sb
->s_root
->d_inode
,
411 &str
, HFSPLUS_SB(sb
).hidden_dir
);
412 mark_inode_dirty(HFSPLUS_SB(sb
).hidden_dir
);
418 hfsplus_put_super(sb
);
423 MODULE_AUTHOR("Brad Boyer");
424 MODULE_DESCRIPTION("Extended Macintosh Filesystem");
425 MODULE_LICENSE("GPL");
427 static kmem_cache_t
*hfsplus_inode_cachep
;
429 static struct inode
*hfsplus_alloc_inode(struct super_block
*sb
)
431 struct hfsplus_inode_info
*i
;
433 i
= kmem_cache_alloc(hfsplus_inode_cachep
, SLAB_KERNEL
);
434 return i
? &i
->vfs_inode
: NULL
;
437 static void hfsplus_destroy_inode(struct inode
*inode
)
439 kmem_cache_free(hfsplus_inode_cachep
, &HFSPLUS_I(inode
));
442 #define HFSPLUS_INODE_SIZE sizeof(struct hfsplus_inode_info)
444 static struct super_block
*hfsplus_get_sb(struct file_system_type
*fs_type
,
445 int flags
, const char *dev_name
, void *data
)
447 return get_sb_bdev(fs_type
, flags
, dev_name
, data
, hfsplus_fill_super
);
450 static struct file_system_type hfsplus_fs_type
= {
451 .owner
= THIS_MODULE
,
453 .get_sb
= hfsplus_get_sb
,
454 .kill_sb
= kill_block_super
,
455 .fs_flags
= FS_REQUIRES_DEV
,
458 static void hfsplus_init_once(void *p
, kmem_cache_t
*cachep
, unsigned long flags
)
460 struct hfsplus_inode_info
*i
= p
;
462 if ((flags
& (SLAB_CTOR_VERIFY
|SLAB_CTOR_CONSTRUCTOR
)) == SLAB_CTOR_CONSTRUCTOR
)
463 inode_init_once(&i
->vfs_inode
);
466 static int __init
init_hfsplus_fs(void)
470 hfsplus_inode_cachep
= kmem_cache_create("hfsplus_icache",
471 HFSPLUS_INODE_SIZE
, 0, SLAB_HWCACHE_ALIGN
,
472 hfsplus_init_once
, NULL
);
473 if (!hfsplus_inode_cachep
)
475 err
= register_filesystem(&hfsplus_fs_type
);
477 kmem_cache_destroy(hfsplus_inode_cachep
);
481 static void __exit
exit_hfsplus_fs(void)
483 unregister_filesystem(&hfsplus_fs_type
);
484 if (kmem_cache_destroy(hfsplus_inode_cachep
))
485 printk(KERN_INFO
"hfsplus_inode_cache: not all structures were freed\n");
488 module_init(init_hfsplus_fs
)
489 module_exit(exit_hfsplus_fs
)