2 * linux/fs/hfsplus/inode.c
5 * Brad Boyer (flar@allandria.com)
6 * (C) 2003 Ardis Technologies <roman@ardistech.com>
8 * Inode handling routines
11 #include <linux/blkdev.h>
14 #include <linux/pagemap.h>
15 #include <linux/mpage.h>
16 #include <linux/sched.h>
18 #include "hfsplus_fs.h"
19 #include "hfsplus_raw.h"
21 static int hfsplus_readpage(struct file
*file
, struct page
*page
)
23 return block_read_full_page(page
, hfsplus_get_block
);
26 static int hfsplus_writepage(struct page
*page
, struct writeback_control
*wbc
)
28 return block_write_full_page(page
, hfsplus_get_block
, wbc
);
31 static int hfsplus_write_begin(struct file
*file
, struct address_space
*mapping
,
32 loff_t pos
, unsigned len
, unsigned flags
,
33 struct page
**pagep
, void **fsdata
)
38 ret
= cont_write_begin(file
, mapping
, pos
, len
, flags
, pagep
, fsdata
,
40 &HFSPLUS_I(mapping
->host
)->phys_size
);
42 loff_t isize
= mapping
->host
->i_size
;
43 if (pos
+ len
> isize
)
44 vmtruncate(mapping
->host
, isize
);
50 static sector_t
hfsplus_bmap(struct address_space
*mapping
, sector_t block
)
52 return generic_block_bmap(mapping
, block
, hfsplus_get_block
);
55 static int hfsplus_releasepage(struct page
*page
, gfp_t mask
)
57 struct inode
*inode
= page
->mapping
->host
;
58 struct super_block
*sb
= inode
->i_sb
;
59 struct hfs_btree
*tree
;
60 struct hfs_bnode
*node
;
64 switch (inode
->i_ino
) {
65 case HFSPLUS_EXT_CNID
:
66 tree
= HFSPLUS_SB(sb
)->ext_tree
;
68 case HFSPLUS_CAT_CNID
:
69 tree
= HFSPLUS_SB(sb
)->cat_tree
;
71 case HFSPLUS_ATTR_CNID
:
72 tree
= HFSPLUS_SB(sb
)->attr_tree
;
80 if (tree
->node_size
>= PAGE_CACHE_SIZE
) {
82 (tree
->node_size_shift
- PAGE_CACHE_SHIFT
);
83 spin_lock(&tree
->hash_lock
);
84 node
= hfs_bnode_findhash(tree
, nidx
);
87 else if (atomic_read(&node
->refcnt
))
90 hfs_bnode_unhash(node
);
93 spin_unlock(&tree
->hash_lock
);
96 (PAGE_CACHE_SHIFT
- tree
->node_size_shift
);
97 i
= 1 << (PAGE_CACHE_SHIFT
- tree
->node_size_shift
);
98 spin_lock(&tree
->hash_lock
);
100 node
= hfs_bnode_findhash(tree
, nidx
++);
103 if (atomic_read(&node
->refcnt
)) {
107 hfs_bnode_unhash(node
);
108 hfs_bnode_free(node
);
109 } while (--i
&& nidx
< tree
->node_count
);
110 spin_unlock(&tree
->hash_lock
);
112 return res
? try_to_free_buffers(page
) : 0;
115 static ssize_t
hfsplus_direct_IO(int rw
, struct kiocb
*iocb
,
116 const struct iovec
*iov
, loff_t offset
, unsigned long nr_segs
)
118 struct file
*file
= iocb
->ki_filp
;
119 struct inode
*inode
= file
->f_path
.dentry
->d_inode
->i_mapping
->host
;
122 ret
= blockdev_direct_IO(rw
, iocb
, inode
, inode
->i_sb
->s_bdev
, iov
,
123 offset
, nr_segs
, hfsplus_get_block
, NULL
);
126 * In case of error extending write may have instantiated a few
127 * blocks outside i_size. Trim these off again.
129 if (unlikely((rw
& WRITE
) && ret
< 0)) {
130 loff_t isize
= i_size_read(inode
);
131 loff_t end
= offset
+ iov_length(iov
, nr_segs
);
134 vmtruncate(inode
, isize
);
140 static int hfsplus_writepages(struct address_space
*mapping
,
141 struct writeback_control
*wbc
)
143 return mpage_writepages(mapping
, wbc
, hfsplus_get_block
);
146 const struct address_space_operations hfsplus_btree_aops
= {
147 .readpage
= hfsplus_readpage
,
148 .writepage
= hfsplus_writepage
,
149 .write_begin
= hfsplus_write_begin
,
150 .write_end
= generic_write_end
,
151 .bmap
= hfsplus_bmap
,
152 .releasepage
= hfsplus_releasepage
,
155 const struct address_space_operations hfsplus_aops
= {
156 .readpage
= hfsplus_readpage
,
157 .writepage
= hfsplus_writepage
,
158 .write_begin
= hfsplus_write_begin
,
159 .write_end
= generic_write_end
,
160 .bmap
= hfsplus_bmap
,
161 .direct_IO
= hfsplus_direct_IO
,
162 .writepages
= hfsplus_writepages
,
165 const struct dentry_operations hfsplus_dentry_operations
= {
166 .d_hash
= hfsplus_hash_dentry
,
167 .d_compare
= hfsplus_compare_dentry
,
170 static struct dentry
*hfsplus_file_lookup(struct inode
*dir
,
171 struct dentry
*dentry
, struct nameidata
*nd
)
173 struct hfs_find_data fd
;
174 struct super_block
*sb
= dir
->i_sb
;
175 struct inode
*inode
= NULL
;
176 struct hfsplus_inode_info
*hip
;
179 if (HFSPLUS_IS_RSRC(dir
) || strcmp(dentry
->d_name
.name
, "rsrc"))
182 inode
= HFSPLUS_I(dir
)->rsrc_inode
;
186 inode
= new_inode(sb
);
188 return ERR_PTR(-ENOMEM
);
190 hip
= HFSPLUS_I(inode
);
191 inode
->i_ino
= dir
->i_ino
;
192 INIT_LIST_HEAD(&hip
->open_dir_list
);
193 mutex_init(&hip
->extents_lock
);
194 hip
->extent_state
= 0;
196 set_bit(HFSPLUS_I_RSRC
, &hip
->flags
);
198 hfs_find_init(HFSPLUS_SB(sb
)->cat_tree
, &fd
);
199 err
= hfsplus_find_cat(sb
, dir
->i_ino
, &fd
);
201 err
= hfsplus_cat_read_inode(inode
, &fd
);
207 hip
->rsrc_inode
= dir
;
208 HFSPLUS_I(dir
)->rsrc_inode
= inode
;
212 * __mark_inode_dirty expects inodes to be hashed. Since we don't
213 * want resource fork inodes in the regular inode space, we make them
214 * appear hashed, but do not put on any lists. hlist_del()
215 * will work fine and require no locking.
217 hlist_add_fake(&inode
->i_hash
);
219 mark_inode_dirty(inode
);
221 d_add(dentry
, inode
);
225 static void hfsplus_get_perms(struct inode
*inode
,
226 struct hfsplus_perm
*perms
, int dir
)
228 struct hfsplus_sb_info
*sbi
= HFSPLUS_SB(inode
->i_sb
);
231 mode
= be16_to_cpu(perms
->mode
);
233 inode
->i_uid
= be32_to_cpu(perms
->owner
);
234 if (!inode
->i_uid
&& !mode
)
235 inode
->i_uid
= sbi
->uid
;
237 inode
->i_gid
= be32_to_cpu(perms
->group
);
238 if (!inode
->i_gid
&& !mode
)
239 inode
->i_gid
= sbi
->gid
;
242 mode
= mode
? (mode
& S_IALLUGO
) : (S_IRWXUGO
& ~(sbi
->umask
));
245 mode
= S_IFREG
| ((S_IRUGO
|S_IWUGO
) & ~(sbi
->umask
));
246 inode
->i_mode
= mode
;
248 HFSPLUS_I(inode
)->userflags
= perms
->userflags
;
249 if (perms
->rootflags
& HFSPLUS_FLG_IMMUTABLE
)
250 inode
->i_flags
|= S_IMMUTABLE
;
252 inode
->i_flags
&= ~S_IMMUTABLE
;
253 if (perms
->rootflags
& HFSPLUS_FLG_APPEND
)
254 inode
->i_flags
|= S_APPEND
;
256 inode
->i_flags
&= ~S_APPEND
;
259 static int hfsplus_file_open(struct inode
*inode
, struct file
*file
)
261 if (HFSPLUS_IS_RSRC(inode
))
262 inode
= HFSPLUS_I(inode
)->rsrc_inode
;
263 if (!(file
->f_flags
& O_LARGEFILE
) && i_size_read(inode
) > MAX_NON_LFS
)
265 atomic_inc(&HFSPLUS_I(inode
)->opencnt
);
269 static int hfsplus_file_release(struct inode
*inode
, struct file
*file
)
271 struct super_block
*sb
= inode
->i_sb
;
273 if (HFSPLUS_IS_RSRC(inode
))
274 inode
= HFSPLUS_I(inode
)->rsrc_inode
;
275 if (atomic_dec_and_test(&HFSPLUS_I(inode
)->opencnt
)) {
276 mutex_lock(&inode
->i_mutex
);
277 hfsplus_file_truncate(inode
);
278 if (inode
->i_flags
& S_DEAD
) {
279 hfsplus_delete_cat(inode
->i_ino
,
280 HFSPLUS_SB(sb
)->hidden_dir
, NULL
);
281 hfsplus_delete_inode(inode
);
283 mutex_unlock(&inode
->i_mutex
);
288 static int hfsplus_setattr(struct dentry
*dentry
, struct iattr
*attr
)
290 struct inode
*inode
= dentry
->d_inode
;
293 error
= inode_change_ok(inode
, attr
);
297 if ((attr
->ia_valid
& ATTR_SIZE
) &&
298 attr
->ia_size
!= i_size_read(inode
)) {
299 error
= vmtruncate(inode
, attr
->ia_size
);
304 setattr_copy(inode
, attr
);
305 mark_inode_dirty(inode
);
309 int hfsplus_file_fsync(struct file
*file
, int datasync
)
311 struct inode
*inode
= file
->f_mapping
->host
;
312 struct hfsplus_inode_info
*hip
= HFSPLUS_I(inode
);
313 struct hfsplus_sb_info
*sbi
= HFSPLUS_SB(inode
->i_sb
);
314 int error
= 0, error2
;
317 * Sync inode metadata into the catalog and extent trees.
319 sync_inode_metadata(inode
, 1);
322 * And explicitly write out the btrees.
324 if (test_and_clear_bit(HFSPLUS_I_CAT_DIRTY
, &hip
->flags
))
325 error
= filemap_write_and_wait(sbi
->cat_tree
->inode
->i_mapping
);
327 if (test_and_clear_bit(HFSPLUS_I_EXT_DIRTY
, &hip
->flags
)) {
329 filemap_write_and_wait(sbi
->ext_tree
->inode
->i_mapping
);
334 if (test_and_clear_bit(HFSPLUS_I_ALLOC_DIRTY
, &hip
->flags
)) {
335 error2
= filemap_write_and_wait(sbi
->alloc_file
->i_mapping
);
340 if (!test_bit(HFSPLUS_SB_NOBARRIER
, &sbi
->flags
))
341 blkdev_issue_flush(inode
->i_sb
->s_bdev
, GFP_KERNEL
, NULL
);
346 static const struct inode_operations hfsplus_file_inode_operations
= {
347 .lookup
= hfsplus_file_lookup
,
348 .truncate
= hfsplus_file_truncate
,
349 .setattr
= hfsplus_setattr
,
350 .setxattr
= hfsplus_setxattr
,
351 .getxattr
= hfsplus_getxattr
,
352 .listxattr
= hfsplus_listxattr
,
355 static const struct file_operations hfsplus_file_operations
= {
356 .llseek
= generic_file_llseek
,
357 .read
= do_sync_read
,
358 .aio_read
= generic_file_aio_read
,
359 .write
= do_sync_write
,
360 .aio_write
= generic_file_aio_write
,
361 .mmap
= generic_file_mmap
,
362 .splice_read
= generic_file_splice_read
,
363 .fsync
= hfsplus_file_fsync
,
364 .open
= hfsplus_file_open
,
365 .release
= hfsplus_file_release
,
366 .unlocked_ioctl
= hfsplus_ioctl
,
369 struct inode
*hfsplus_new_inode(struct super_block
*sb
, int mode
)
371 struct hfsplus_sb_info
*sbi
= HFSPLUS_SB(sb
);
372 struct inode
*inode
= new_inode(sb
);
373 struct hfsplus_inode_info
*hip
;
378 inode
->i_ino
= sbi
->next_cnid
++;
379 inode
->i_mode
= mode
;
380 inode
->i_uid
= current_fsuid();
381 inode
->i_gid
= current_fsgid();
383 inode
->i_mtime
= inode
->i_atime
= inode
->i_ctime
= CURRENT_TIME_SEC
;
385 hip
= HFSPLUS_I(inode
);
386 INIT_LIST_HEAD(&hip
->open_dir_list
);
387 mutex_init(&hip
->extents_lock
);
388 atomic_set(&hip
->opencnt
, 0);
389 hip
->extent_state
= 0;
391 memset(hip
->first_extents
, 0, sizeof(hfsplus_extent_rec
));
392 memset(hip
->cached_extents
, 0, sizeof(hfsplus_extent_rec
));
393 hip
->alloc_blocks
= 0;
394 hip
->first_blocks
= 0;
395 hip
->cached_start
= 0;
396 hip
->cached_blocks
= 0;
399 hip
->rsrc_inode
= NULL
;
400 if (S_ISDIR(inode
->i_mode
)) {
403 inode
->i_op
= &hfsplus_dir_inode_operations
;
404 inode
->i_fop
= &hfsplus_dir_operations
;
405 } else if (S_ISREG(inode
->i_mode
)) {
407 inode
->i_op
= &hfsplus_file_inode_operations
;
408 inode
->i_fop
= &hfsplus_file_operations
;
409 inode
->i_mapping
->a_ops
= &hfsplus_aops
;
410 hip
->clump_blocks
= sbi
->data_clump_blocks
;
411 } else if (S_ISLNK(inode
->i_mode
)) {
413 inode
->i_op
= &page_symlink_inode_operations
;
414 inode
->i_mapping
->a_ops
= &hfsplus_aops
;
415 hip
->clump_blocks
= 1;
418 insert_inode_hash(inode
);
419 mark_inode_dirty(inode
);
425 void hfsplus_delete_inode(struct inode
*inode
)
427 struct super_block
*sb
= inode
->i_sb
;
429 if (S_ISDIR(inode
->i_mode
)) {
430 HFSPLUS_SB(sb
)->folder_count
--;
434 HFSPLUS_SB(sb
)->file_count
--;
435 if (S_ISREG(inode
->i_mode
)) {
436 if (!inode
->i_nlink
) {
438 hfsplus_file_truncate(inode
);
440 } else if (S_ISLNK(inode
->i_mode
)) {
442 hfsplus_file_truncate(inode
);
447 void hfsplus_inode_read_fork(struct inode
*inode
, struct hfsplus_fork_raw
*fork
)
449 struct super_block
*sb
= inode
->i_sb
;
450 struct hfsplus_sb_info
*sbi
= HFSPLUS_SB(sb
);
451 struct hfsplus_inode_info
*hip
= HFSPLUS_I(inode
);
455 memcpy(&hip
->first_extents
, &fork
->extents
, sizeof(hfsplus_extent_rec
));
456 for (count
= 0, i
= 0; i
< 8; i
++)
457 count
+= be32_to_cpu(fork
->extents
[i
].block_count
);
458 hip
->first_blocks
= count
;
459 memset(hip
->cached_extents
, 0, sizeof(hfsplus_extent_rec
));
460 hip
->cached_start
= 0;
461 hip
->cached_blocks
= 0;
463 hip
->alloc_blocks
= be32_to_cpu(fork
->total_blocks
);
464 hip
->phys_size
= inode
->i_size
= be64_to_cpu(fork
->total_size
);
466 (inode
->i_size
+ sb
->s_blocksize
- 1) >> sb
->s_blocksize_bits
;
467 inode_set_bytes(inode
, hip
->fs_blocks
<< sb
->s_blocksize_bits
);
469 be32_to_cpu(fork
->clump_size
) >> sbi
->alloc_blksz_shift
;
470 if (!hip
->clump_blocks
) {
471 hip
->clump_blocks
= HFSPLUS_IS_RSRC(inode
) ?
472 sbi
->rsrc_clump_blocks
:
473 sbi
->data_clump_blocks
;
477 void hfsplus_inode_write_fork(struct inode
*inode
,
478 struct hfsplus_fork_raw
*fork
)
480 memcpy(&fork
->extents
, &HFSPLUS_I(inode
)->first_extents
,
481 sizeof(hfsplus_extent_rec
));
482 fork
->total_size
= cpu_to_be64(inode
->i_size
);
483 fork
->total_blocks
= cpu_to_be32(HFSPLUS_I(inode
)->alloc_blocks
);
486 int hfsplus_cat_read_inode(struct inode
*inode
, struct hfs_find_data
*fd
)
488 hfsplus_cat_entry entry
;
492 type
= hfs_bnode_read_u16(fd
->bnode
, fd
->entryoffset
);
494 HFSPLUS_I(inode
)->linkid
= 0;
495 if (type
== HFSPLUS_FOLDER
) {
496 struct hfsplus_cat_folder
*folder
= &entry
.folder
;
498 if (fd
->entrylength
< sizeof(struct hfsplus_cat_folder
))
500 hfs_bnode_read(fd
->bnode
, &entry
, fd
->entryoffset
,
501 sizeof(struct hfsplus_cat_folder
));
502 hfsplus_get_perms(inode
, &folder
->permissions
, 1);
504 inode
->i_size
= 2 + be32_to_cpu(folder
->valence
);
505 inode
->i_atime
= hfsp_mt2ut(folder
->access_date
);
506 inode
->i_mtime
= hfsp_mt2ut(folder
->content_mod_date
);
507 inode
->i_ctime
= hfsp_mt2ut(folder
->attribute_mod_date
);
508 HFSPLUS_I(inode
)->create_date
= folder
->create_date
;
509 HFSPLUS_I(inode
)->fs_blocks
= 0;
510 inode
->i_op
= &hfsplus_dir_inode_operations
;
511 inode
->i_fop
= &hfsplus_dir_operations
;
512 } else if (type
== HFSPLUS_FILE
) {
513 struct hfsplus_cat_file
*file
= &entry
.file
;
515 if (fd
->entrylength
< sizeof(struct hfsplus_cat_file
))
517 hfs_bnode_read(fd
->bnode
, &entry
, fd
->entryoffset
,
518 sizeof(struct hfsplus_cat_file
));
520 hfsplus_inode_read_fork(inode
, HFSPLUS_IS_RSRC(inode
) ?
521 &file
->rsrc_fork
: &file
->data_fork
);
522 hfsplus_get_perms(inode
, &file
->permissions
, 0);
524 if (S_ISREG(inode
->i_mode
)) {
525 if (file
->permissions
.dev
)
527 be32_to_cpu(file
->permissions
.dev
);
528 inode
->i_op
= &hfsplus_file_inode_operations
;
529 inode
->i_fop
= &hfsplus_file_operations
;
530 inode
->i_mapping
->a_ops
= &hfsplus_aops
;
531 } else if (S_ISLNK(inode
->i_mode
)) {
532 inode
->i_op
= &page_symlink_inode_operations
;
533 inode
->i_mapping
->a_ops
= &hfsplus_aops
;
535 init_special_inode(inode
, inode
->i_mode
,
536 be32_to_cpu(file
->permissions
.dev
));
538 inode
->i_atime
= hfsp_mt2ut(file
->access_date
);
539 inode
->i_mtime
= hfsp_mt2ut(file
->content_mod_date
);
540 inode
->i_ctime
= hfsp_mt2ut(file
->attribute_mod_date
);
541 HFSPLUS_I(inode
)->create_date
= file
->create_date
;
543 printk(KERN_ERR
"hfs: bad catalog entry used to create inode\n");
549 int hfsplus_cat_write_inode(struct inode
*inode
)
551 struct inode
*main_inode
= inode
;
552 struct hfs_find_data fd
;
553 hfsplus_cat_entry entry
;
555 if (HFSPLUS_IS_RSRC(inode
))
556 main_inode
= HFSPLUS_I(inode
)->rsrc_inode
;
558 if (!main_inode
->i_nlink
)
561 if (hfs_find_init(HFSPLUS_SB(main_inode
->i_sb
)->cat_tree
, &fd
))
565 if (hfsplus_find_cat(main_inode
->i_sb
, main_inode
->i_ino
, &fd
))
569 if (S_ISDIR(main_inode
->i_mode
)) {
570 struct hfsplus_cat_folder
*folder
= &entry
.folder
;
572 if (fd
.entrylength
< sizeof(struct hfsplus_cat_folder
))
574 hfs_bnode_read(fd
.bnode
, &entry
, fd
.entryoffset
,
575 sizeof(struct hfsplus_cat_folder
));
576 /* simple node checks? */
577 hfsplus_cat_set_perms(inode
, &folder
->permissions
);
578 folder
->access_date
= hfsp_ut2mt(inode
->i_atime
);
579 folder
->content_mod_date
= hfsp_ut2mt(inode
->i_mtime
);
580 folder
->attribute_mod_date
= hfsp_ut2mt(inode
->i_ctime
);
581 folder
->valence
= cpu_to_be32(inode
->i_size
- 2);
582 hfs_bnode_write(fd
.bnode
, &entry
, fd
.entryoffset
,
583 sizeof(struct hfsplus_cat_folder
));
584 } else if (HFSPLUS_IS_RSRC(inode
)) {
585 struct hfsplus_cat_file
*file
= &entry
.file
;
586 hfs_bnode_read(fd
.bnode
, &entry
, fd
.entryoffset
,
587 sizeof(struct hfsplus_cat_file
));
588 hfsplus_inode_write_fork(inode
, &file
->rsrc_fork
);
589 hfs_bnode_write(fd
.bnode
, &entry
, fd
.entryoffset
,
590 sizeof(struct hfsplus_cat_file
));
592 struct hfsplus_cat_file
*file
= &entry
.file
;
594 if (fd
.entrylength
< sizeof(struct hfsplus_cat_file
))
596 hfs_bnode_read(fd
.bnode
, &entry
, fd
.entryoffset
,
597 sizeof(struct hfsplus_cat_file
));
598 hfsplus_inode_write_fork(inode
, &file
->data_fork
);
599 hfsplus_cat_set_perms(inode
, &file
->permissions
);
600 if (HFSPLUS_FLG_IMMUTABLE
&
601 (file
->permissions
.rootflags
|
602 file
->permissions
.userflags
))
603 file
->flags
|= cpu_to_be16(HFSPLUS_FILE_LOCKED
);
605 file
->flags
&= cpu_to_be16(~HFSPLUS_FILE_LOCKED
);
606 file
->access_date
= hfsp_ut2mt(inode
->i_atime
);
607 file
->content_mod_date
= hfsp_ut2mt(inode
->i_mtime
);
608 file
->attribute_mod_date
= hfsp_ut2mt(inode
->i_ctime
);
609 hfs_bnode_write(fd
.bnode
, &entry
, fd
.entryoffset
,
610 sizeof(struct hfsplus_cat_file
));
613 set_bit(HFSPLUS_I_CAT_DIRTY
, &HFSPLUS_I(inode
)->flags
);