2 * linux/fs/hfsplus/inode.c
5 * Brad Boyer (flar@allandria.com)
6 * (C) 2003 Ardis Technologies <roman@ardistech.com>
8 * Inode handling routines
13 #include <linux/pagemap.h>
14 #include <linux/mpage.h>
16 #include "hfsplus_fs.h"
17 #include "hfsplus_raw.h"
19 static int hfsplus_readpage(struct file
*file
, struct page
*page
)
21 return block_read_full_page(page
, hfsplus_get_block
);
24 static int hfsplus_writepage(struct page
*page
, struct writeback_control
*wbc
)
26 return block_write_full_page(page
, hfsplus_get_block
, wbc
);
29 static int hfsplus_prepare_write(struct file
*file
, struct page
*page
, unsigned from
, unsigned to
)
31 return cont_prepare_write(page
, from
, to
, hfsplus_get_block
,
32 &HFSPLUS_I(page
->mapping
->host
).phys_size
);
35 static sector_t
hfsplus_bmap(struct address_space
*mapping
, sector_t block
)
37 return generic_block_bmap(mapping
, block
, hfsplus_get_block
);
40 static int hfsplus_releasepage(struct page
*page
, gfp_t mask
)
42 struct inode
*inode
= page
->mapping
->host
;
43 struct super_block
*sb
= inode
->i_sb
;
44 struct hfs_btree
*tree
;
45 struct hfs_bnode
*node
;
49 switch (inode
->i_ino
) {
50 case HFSPLUS_EXT_CNID
:
51 tree
= HFSPLUS_SB(sb
).ext_tree
;
53 case HFSPLUS_CAT_CNID
:
54 tree
= HFSPLUS_SB(sb
).cat_tree
;
56 case HFSPLUS_ATTR_CNID
:
57 tree
= HFSPLUS_SB(sb
).attr_tree
;
63 if (tree
->node_size
>= PAGE_CACHE_SIZE
) {
64 nidx
= page
->index
>> (tree
->node_size_shift
- PAGE_CACHE_SHIFT
);
65 spin_lock(&tree
->hash_lock
);
66 node
= hfs_bnode_findhash(tree
, nidx
);
69 else if (atomic_read(&node
->refcnt
))
72 hfs_bnode_unhash(node
);
75 spin_unlock(&tree
->hash_lock
);
77 nidx
= page
->index
<< (PAGE_CACHE_SHIFT
- tree
->node_size_shift
);
78 i
= 1 << (PAGE_CACHE_SHIFT
- tree
->node_size_shift
);
79 spin_lock(&tree
->hash_lock
);
81 node
= hfs_bnode_findhash(tree
, nidx
++);
84 if (atomic_read(&node
->refcnt
)) {
88 hfs_bnode_unhash(node
);
90 } while (--i
&& nidx
< tree
->node_count
);
91 spin_unlock(&tree
->hash_lock
);
93 return res
? try_to_free_buffers(page
) : 0;
96 #ifdef CONFIG_DIRECTIO
97 static ssize_t
hfsplus_direct_IO(int rw
, struct kiocb
*iocb
,
98 const struct iovec
*iov
, loff_t offset
, unsigned long nr_segs
)
100 struct file
*file
= iocb
->ki_filp
;
101 struct inode
*inode
= file
->f_dentry
->d_inode
->i_mapping
->host
;
103 return blockdev_direct_IO(rw
, iocb
, inode
, inode
->i_sb
->s_bdev
, iov
,
104 offset
, nr_segs
, hfsplus_get_block
, NULL
);
108 static int hfsplus_writepages(struct address_space
*mapping
,
109 struct writeback_control
*wbc
)
111 return mpage_writepages(mapping
, wbc
, hfsplus_get_block
);
114 const struct address_space_operations hfsplus_btree_aops
= {
115 .readpage
= hfsplus_readpage
,
116 .writepage
= hfsplus_writepage
,
117 .sync_page
= block_sync_page
,
118 .prepare_write
= hfsplus_prepare_write
,
119 .commit_write
= generic_commit_write
,
120 .bmap
= hfsplus_bmap
,
121 .releasepage
= hfsplus_releasepage
,
124 const struct address_space_operations hfsplus_aops
= {
125 .readpage
= hfsplus_readpage
,
126 .writepage
= hfsplus_writepage
,
127 .sync_page
= block_sync_page
,
128 .prepare_write
= hfsplus_prepare_write
,
129 .commit_write
= generic_commit_write
,
130 .bmap
= hfsplus_bmap
,
131 #ifdef CONFIG_DIRECTIO
132 .direct_IO
= hfsplus_direct_IO
,
134 .writepages
= hfsplus_writepages
,
137 static struct dentry
*hfsplus_file_lookup(struct inode
*dir
, struct dentry
*dentry
,
138 struct nameidata
*nd
)
140 struct hfs_find_data fd
;
141 struct super_block
*sb
= dir
->i_sb
;
142 struct inode
*inode
= NULL
;
145 if (HFSPLUS_IS_RSRC(dir
) || strcmp(dentry
->d_name
.name
, "rsrc"))
148 inode
= HFSPLUS_I(dir
).rsrc_inode
;
152 inode
= new_inode(sb
);
154 return ERR_PTR(-ENOMEM
);
156 inode
->i_ino
= dir
->i_ino
;
157 INIT_LIST_HEAD(&HFSPLUS_I(inode
).open_dir_list
);
158 init_MUTEX(&HFSPLUS_I(inode
).extents_lock
);
159 HFSPLUS_I(inode
).flags
= HFSPLUS_FLG_RSRC
;
161 hfs_find_init(HFSPLUS_SB(sb
).cat_tree
, &fd
);
162 err
= hfsplus_find_cat(sb
, dir
->i_ino
, &fd
);
164 err
= hfsplus_cat_read_inode(inode
, &fd
);
170 HFSPLUS_I(inode
).rsrc_inode
= dir
;
171 HFSPLUS_I(dir
).rsrc_inode
= inode
;
173 hlist_add_head(&inode
->i_hash
, &HFSPLUS_SB(sb
).rsrc_inodes
);
174 mark_inode_dirty(inode
);
176 d_add(dentry
, inode
);
180 static void hfsplus_get_perms(struct inode
*inode
, struct hfsplus_perm
*perms
, int dir
)
182 struct super_block
*sb
= inode
->i_sb
;
185 mode
= be16_to_cpu(perms
->mode
);
187 inode
->i_uid
= be32_to_cpu(perms
->owner
);
188 if (!inode
->i_uid
&& !mode
)
189 inode
->i_uid
= HFSPLUS_SB(sb
).uid
;
191 inode
->i_gid
= be32_to_cpu(perms
->group
);
192 if (!inode
->i_gid
&& !mode
)
193 inode
->i_gid
= HFSPLUS_SB(sb
).gid
;
196 mode
= mode
? (mode
& S_IALLUGO
) :
197 (S_IRWXUGO
& ~(HFSPLUS_SB(sb
).umask
));
200 mode
= S_IFREG
| ((S_IRUGO
|S_IWUGO
) &
201 ~(HFSPLUS_SB(sb
).umask
));
202 inode
->i_mode
= mode
;
204 HFSPLUS_I(inode
).rootflags
= perms
->rootflags
;
205 HFSPLUS_I(inode
).userflags
= perms
->userflags
;
206 if (perms
->rootflags
& HFSPLUS_FLG_IMMUTABLE
)
207 inode
->i_flags
|= S_IMMUTABLE
;
209 inode
->i_flags
&= ~S_IMMUTABLE
;
210 if (perms
->rootflags
& HFSPLUS_FLG_APPEND
)
211 inode
->i_flags
|= S_APPEND
;
213 inode
->i_flags
&= ~S_APPEND
;
216 static void hfsplus_set_perms(struct inode
*inode
, struct hfsplus_perm
*perms
)
218 if (inode
->i_flags
& S_IMMUTABLE
)
219 perms
->rootflags
|= HFSPLUS_FLG_IMMUTABLE
;
221 perms
->rootflags
&= ~HFSPLUS_FLG_IMMUTABLE
;
222 if (inode
->i_flags
& S_APPEND
)
223 perms
->rootflags
|= HFSPLUS_FLG_APPEND
;
225 perms
->rootflags
&= ~HFSPLUS_FLG_APPEND
;
226 perms
->userflags
= HFSPLUS_I(inode
).userflags
;
227 perms
->mode
= cpu_to_be16(inode
->i_mode
);
228 perms
->owner
= cpu_to_be32(inode
->i_uid
);
229 perms
->group
= cpu_to_be32(inode
->i_gid
);
230 perms
->dev
= cpu_to_be32(HFSPLUS_I(inode
).dev
);
233 static int hfsplus_permission(struct inode
*inode
, int mask
, struct nameidata
*nd
)
235 /* MAY_EXEC is also used for lookup, if no x bit is set allow lookup,
236 * open_exec has the same test, so it's still not executable, if a x bit
237 * is set fall back to standard permission check.
239 if (S_ISREG(inode
->i_mode
) && mask
& MAY_EXEC
&& !(inode
->i_mode
& 0111))
241 return generic_permission(inode
, mask
, NULL
);
245 static int hfsplus_file_open(struct inode
*inode
, struct file
*file
)
247 if (HFSPLUS_IS_RSRC(inode
))
248 inode
= HFSPLUS_I(inode
).rsrc_inode
;
249 if (atomic_read(&file
->f_count
) != 1)
251 atomic_inc(&HFSPLUS_I(inode
).opencnt
);
255 static int hfsplus_file_release(struct inode
*inode
, struct file
*file
)
257 struct super_block
*sb
= inode
->i_sb
;
259 if (HFSPLUS_IS_RSRC(inode
))
260 inode
= HFSPLUS_I(inode
).rsrc_inode
;
261 if (atomic_read(&file
->f_count
) != 0)
263 if (atomic_dec_and_test(&HFSPLUS_I(inode
).opencnt
)) {
264 mutex_lock(&inode
->i_mutex
);
265 hfsplus_file_truncate(inode
);
266 if (inode
->i_flags
& S_DEAD
) {
267 hfsplus_delete_cat(inode
->i_ino
, HFSPLUS_SB(sb
).hidden_dir
, NULL
);
268 hfsplus_delete_inode(inode
);
270 mutex_unlock(&inode
->i_mutex
);
275 extern struct inode_operations hfsplus_dir_inode_operations
;
276 extern struct file_operations hfsplus_dir_operations
;
278 static struct inode_operations hfsplus_file_inode_operations
= {
279 .lookup
= hfsplus_file_lookup
,
280 .truncate
= hfsplus_file_truncate
,
281 .permission
= hfsplus_permission
,
282 .setxattr
= hfsplus_setxattr
,
283 .getxattr
= hfsplus_getxattr
,
284 .listxattr
= hfsplus_listxattr
,
287 static const struct file_operations hfsplus_file_operations
= {
288 .llseek
= generic_file_llseek
,
289 .read
= do_sync_read
,
290 .aio_read
= generic_file_aio_read
,
291 .write
= do_sync_write
,
292 .aio_write
= generic_file_aio_write
,
293 .mmap
= generic_file_mmap
,
294 .sendfile
= generic_file_sendfile
,
296 .open
= hfsplus_file_open
,
297 .release
= hfsplus_file_release
,
298 .ioctl
= hfsplus_ioctl
,
301 struct inode
*hfsplus_new_inode(struct super_block
*sb
, int mode
)
303 struct inode
*inode
= new_inode(sb
);
307 inode
->i_ino
= HFSPLUS_SB(sb
).next_cnid
++;
308 inode
->i_mode
= mode
;
309 inode
->i_uid
= current
->fsuid
;
310 inode
->i_gid
= current
->fsgid
;
312 inode
->i_mtime
= inode
->i_atime
= inode
->i_ctime
= CURRENT_TIME_SEC
;
313 INIT_LIST_HEAD(&HFSPLUS_I(inode
).open_dir_list
);
314 init_MUTEX(&HFSPLUS_I(inode
).extents_lock
);
315 atomic_set(&HFSPLUS_I(inode
).opencnt
, 0);
316 HFSPLUS_I(inode
).flags
= 0;
317 memset(HFSPLUS_I(inode
).first_extents
, 0, sizeof(hfsplus_extent_rec
));
318 memset(HFSPLUS_I(inode
).cached_extents
, 0, sizeof(hfsplus_extent_rec
));
319 HFSPLUS_I(inode
).alloc_blocks
= 0;
320 HFSPLUS_I(inode
).first_blocks
= 0;
321 HFSPLUS_I(inode
).cached_start
= 0;
322 HFSPLUS_I(inode
).cached_blocks
= 0;
323 HFSPLUS_I(inode
).phys_size
= 0;
324 HFSPLUS_I(inode
).fs_blocks
= 0;
325 HFSPLUS_I(inode
).rsrc_inode
= NULL
;
326 if (S_ISDIR(inode
->i_mode
)) {
328 HFSPLUS_SB(sb
).folder_count
++;
329 inode
->i_op
= &hfsplus_dir_inode_operations
;
330 inode
->i_fop
= &hfsplus_dir_operations
;
331 } else if (S_ISREG(inode
->i_mode
)) {
332 HFSPLUS_SB(sb
).file_count
++;
333 inode
->i_op
= &hfsplus_file_inode_operations
;
334 inode
->i_fop
= &hfsplus_file_operations
;
335 inode
->i_mapping
->a_ops
= &hfsplus_aops
;
336 HFSPLUS_I(inode
).clump_blocks
= HFSPLUS_SB(sb
).data_clump_blocks
;
337 } else if (S_ISLNK(inode
->i_mode
)) {
338 HFSPLUS_SB(sb
).file_count
++;
339 inode
->i_op
= &page_symlink_inode_operations
;
340 inode
->i_mapping
->a_ops
= &hfsplus_aops
;
341 HFSPLUS_I(inode
).clump_blocks
= 1;
343 HFSPLUS_SB(sb
).file_count
++;
344 insert_inode_hash(inode
);
345 mark_inode_dirty(inode
);
351 void hfsplus_delete_inode(struct inode
*inode
)
353 struct super_block
*sb
= inode
->i_sb
;
355 if (S_ISDIR(inode
->i_mode
)) {
356 HFSPLUS_SB(sb
).folder_count
--;
360 HFSPLUS_SB(sb
).file_count
--;
361 if (S_ISREG(inode
->i_mode
)) {
362 if (!inode
->i_nlink
) {
364 hfsplus_file_truncate(inode
);
366 } else if (S_ISLNK(inode
->i_mode
)) {
368 hfsplus_file_truncate(inode
);
373 void hfsplus_inode_read_fork(struct inode
*inode
, struct hfsplus_fork_raw
*fork
)
375 struct super_block
*sb
= inode
->i_sb
;
379 memcpy(&HFSPLUS_I(inode
).first_extents
, &fork
->extents
,
380 sizeof(hfsplus_extent_rec
));
381 for (count
= 0, i
= 0; i
< 8; i
++)
382 count
+= be32_to_cpu(fork
->extents
[i
].block_count
);
383 HFSPLUS_I(inode
).first_blocks
= count
;
384 memset(HFSPLUS_I(inode
).cached_extents
, 0, sizeof(hfsplus_extent_rec
));
385 HFSPLUS_I(inode
).cached_start
= 0;
386 HFSPLUS_I(inode
).cached_blocks
= 0;
388 HFSPLUS_I(inode
).alloc_blocks
= be32_to_cpu(fork
->total_blocks
);
389 inode
->i_size
= HFSPLUS_I(inode
).phys_size
= be64_to_cpu(fork
->total_size
);
390 HFSPLUS_I(inode
).fs_blocks
= (inode
->i_size
+ sb
->s_blocksize
- 1) >> sb
->s_blocksize_bits
;
391 inode_set_bytes(inode
, HFSPLUS_I(inode
).fs_blocks
<< sb
->s_blocksize_bits
);
392 HFSPLUS_I(inode
).clump_blocks
= be32_to_cpu(fork
->clump_size
) >> HFSPLUS_SB(sb
).alloc_blksz_shift
;
393 if (!HFSPLUS_I(inode
).clump_blocks
)
394 HFSPLUS_I(inode
).clump_blocks
= HFSPLUS_IS_RSRC(inode
) ? HFSPLUS_SB(sb
).rsrc_clump_blocks
:
395 HFSPLUS_SB(sb
).data_clump_blocks
;
398 void hfsplus_inode_write_fork(struct inode
*inode
, struct hfsplus_fork_raw
*fork
)
400 memcpy(&fork
->extents
, &HFSPLUS_I(inode
).first_extents
,
401 sizeof(hfsplus_extent_rec
));
402 fork
->total_size
= cpu_to_be64(inode
->i_size
);
403 fork
->total_blocks
= cpu_to_be32(HFSPLUS_I(inode
).alloc_blocks
);
406 int hfsplus_cat_read_inode(struct inode
*inode
, struct hfs_find_data
*fd
)
408 hfsplus_cat_entry entry
;
412 type
= hfs_bnode_read_u16(fd
->bnode
, fd
->entryoffset
);
414 HFSPLUS_I(inode
).dev
= 0;
415 if (type
== HFSPLUS_FOLDER
) {
416 struct hfsplus_cat_folder
*folder
= &entry
.folder
;
418 if (fd
->entrylength
< sizeof(struct hfsplus_cat_folder
))
420 hfs_bnode_read(fd
->bnode
, &entry
, fd
->entryoffset
,
421 sizeof(struct hfsplus_cat_folder
));
422 hfsplus_get_perms(inode
, &folder
->permissions
, 1);
424 inode
->i_size
= 2 + be32_to_cpu(folder
->valence
);
425 inode
->i_atime
= hfsp_mt2ut(folder
->access_date
);
426 inode
->i_mtime
= hfsp_mt2ut(folder
->content_mod_date
);
427 inode
->i_ctime
= hfsp_mt2ut(folder
->attribute_mod_date
);
428 HFSPLUS_I(inode
).create_date
= folder
->create_date
;
429 HFSPLUS_I(inode
).fs_blocks
= 0;
430 inode
->i_op
= &hfsplus_dir_inode_operations
;
431 inode
->i_fop
= &hfsplus_dir_operations
;
432 } else if (type
== HFSPLUS_FILE
) {
433 struct hfsplus_cat_file
*file
= &entry
.file
;
435 if (fd
->entrylength
< sizeof(struct hfsplus_cat_file
))
437 hfs_bnode_read(fd
->bnode
, &entry
, fd
->entryoffset
,
438 sizeof(struct hfsplus_cat_file
));
440 hfsplus_inode_read_fork(inode
, HFSPLUS_IS_DATA(inode
) ?
441 &file
->data_fork
: &file
->rsrc_fork
);
442 hfsplus_get_perms(inode
, &file
->permissions
, 0);
444 if (S_ISREG(inode
->i_mode
)) {
445 if (file
->permissions
.dev
)
446 inode
->i_nlink
= be32_to_cpu(file
->permissions
.dev
);
447 inode
->i_op
= &hfsplus_file_inode_operations
;
448 inode
->i_fop
= &hfsplus_file_operations
;
449 inode
->i_mapping
->a_ops
= &hfsplus_aops
;
450 } else if (S_ISLNK(inode
->i_mode
)) {
451 inode
->i_op
= &page_symlink_inode_operations
;
452 inode
->i_mapping
->a_ops
= &hfsplus_aops
;
454 init_special_inode(inode
, inode
->i_mode
,
455 be32_to_cpu(file
->permissions
.dev
));
457 inode
->i_atime
= hfsp_mt2ut(file
->access_date
);
458 inode
->i_mtime
= hfsp_mt2ut(file
->content_mod_date
);
459 inode
->i_ctime
= hfsp_mt2ut(file
->attribute_mod_date
);
460 HFSPLUS_I(inode
).create_date
= file
->create_date
;
462 printk(KERN_ERR
"hfs: bad catalog entry used to create inode\n");
468 int hfsplus_cat_write_inode(struct inode
*inode
)
470 struct inode
*main_inode
= inode
;
471 struct hfs_find_data fd
;
472 hfsplus_cat_entry entry
;
474 if (HFSPLUS_IS_RSRC(inode
))
475 main_inode
= HFSPLUS_I(inode
).rsrc_inode
;
477 if (!main_inode
->i_nlink
)
480 if (hfs_find_init(HFSPLUS_SB(main_inode
->i_sb
).cat_tree
, &fd
))
484 if (hfsplus_find_cat(main_inode
->i_sb
, main_inode
->i_ino
, &fd
))
488 if (S_ISDIR(main_inode
->i_mode
)) {
489 struct hfsplus_cat_folder
*folder
= &entry
.folder
;
491 if (fd
.entrylength
< sizeof(struct hfsplus_cat_folder
))
493 hfs_bnode_read(fd
.bnode
, &entry
, fd
.entryoffset
,
494 sizeof(struct hfsplus_cat_folder
));
495 /* simple node checks? */
496 hfsplus_set_perms(inode
, &folder
->permissions
);
497 folder
->access_date
= hfsp_ut2mt(inode
->i_atime
);
498 folder
->content_mod_date
= hfsp_ut2mt(inode
->i_mtime
);
499 folder
->attribute_mod_date
= hfsp_ut2mt(inode
->i_ctime
);
500 folder
->valence
= cpu_to_be32(inode
->i_size
- 2);
501 hfs_bnode_write(fd
.bnode
, &entry
, fd
.entryoffset
,
502 sizeof(struct hfsplus_cat_folder
));
503 } else if (HFSPLUS_IS_RSRC(inode
)) {
504 struct hfsplus_cat_file
*file
= &entry
.file
;
505 hfs_bnode_read(fd
.bnode
, &entry
, fd
.entryoffset
,
506 sizeof(struct hfsplus_cat_file
));
507 hfsplus_inode_write_fork(inode
, &file
->rsrc_fork
);
508 hfs_bnode_write(fd
.bnode
, &entry
, fd
.entryoffset
,
509 sizeof(struct hfsplus_cat_file
));
511 struct hfsplus_cat_file
*file
= &entry
.file
;
513 if (fd
.entrylength
< sizeof(struct hfsplus_cat_file
))
515 hfs_bnode_read(fd
.bnode
, &entry
, fd
.entryoffset
,
516 sizeof(struct hfsplus_cat_file
));
517 hfsplus_inode_write_fork(inode
, &file
->data_fork
);
518 if (S_ISREG(inode
->i_mode
))
519 HFSPLUS_I(inode
).dev
= inode
->i_nlink
;
520 if (S_ISCHR(inode
->i_mode
) || S_ISBLK(inode
->i_mode
))
521 HFSPLUS_I(inode
).dev
= kdev_t_to_nr(inode
->i_rdev
);
522 hfsplus_set_perms(inode
, &file
->permissions
);
523 if ((file
->permissions
.rootflags
| file
->permissions
.userflags
) & HFSPLUS_FLG_IMMUTABLE
)
524 file
->flags
|= cpu_to_be16(HFSPLUS_FILE_LOCKED
);
526 file
->flags
&= cpu_to_be16(~HFSPLUS_FILE_LOCKED
);
527 file
->access_date
= hfsp_ut2mt(inode
->i_atime
);
528 file
->content_mod_date
= hfsp_ut2mt(inode
->i_mtime
);
529 file
->attribute_mod_date
= hfsp_ut2mt(inode
->i_ctime
);
530 hfs_bnode_write(fd
.bnode
, &entry
, fd
.entryoffset
,
531 sizeof(struct hfsplus_cat_file
));