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>
17 #include <linux/cred.h>
18 #include <linux/uio.h>
20 #include "hfsplus_fs.h"
21 #include "hfsplus_raw.h"
25 static int hfsplus_readpage(struct file
*file
, struct page
*page
)
27 return block_read_full_page(page
, hfsplus_get_block
);
30 static int hfsplus_writepage(struct page
*page
, struct writeback_control
*wbc
)
32 return block_write_full_page(page
, hfsplus_get_block
, wbc
);
35 static void hfsplus_write_failed(struct address_space
*mapping
, loff_t to
)
37 struct inode
*inode
= mapping
->host
;
39 if (to
> inode
->i_size
) {
40 truncate_pagecache(inode
, inode
->i_size
);
41 hfsplus_file_truncate(inode
);
45 static int hfsplus_write_begin(struct file
*file
, struct address_space
*mapping
,
46 loff_t pos
, unsigned len
, unsigned flags
,
47 struct page
**pagep
, void **fsdata
)
52 ret
= cont_write_begin(file
, mapping
, pos
, len
, flags
, pagep
, fsdata
,
54 &HFSPLUS_I(mapping
->host
)->phys_size
);
56 hfsplus_write_failed(mapping
, pos
+ len
);
61 static sector_t
hfsplus_bmap(struct address_space
*mapping
, sector_t block
)
63 return generic_block_bmap(mapping
, block
, hfsplus_get_block
);
66 static int hfsplus_releasepage(struct page
*page
, gfp_t mask
)
68 struct inode
*inode
= page
->mapping
->host
;
69 struct super_block
*sb
= inode
->i_sb
;
70 struct hfs_btree
*tree
;
71 struct hfs_bnode
*node
;
75 switch (inode
->i_ino
) {
76 case HFSPLUS_EXT_CNID
:
77 tree
= HFSPLUS_SB(sb
)->ext_tree
;
79 case HFSPLUS_CAT_CNID
:
80 tree
= HFSPLUS_SB(sb
)->cat_tree
;
82 case HFSPLUS_ATTR_CNID
:
83 tree
= HFSPLUS_SB(sb
)->attr_tree
;
91 if (tree
->node_size
>= PAGE_SIZE
) {
93 (tree
->node_size_shift
- PAGE_SHIFT
);
94 spin_lock(&tree
->hash_lock
);
95 node
= hfs_bnode_findhash(tree
, nidx
);
98 else if (atomic_read(&node
->refcnt
))
101 hfs_bnode_unhash(node
);
102 hfs_bnode_free(node
);
104 spin_unlock(&tree
->hash_lock
);
106 nidx
= page
->index
<<
107 (PAGE_SHIFT
- tree
->node_size_shift
);
108 i
= 1 << (PAGE_SHIFT
- tree
->node_size_shift
);
109 spin_lock(&tree
->hash_lock
);
111 node
= hfs_bnode_findhash(tree
, nidx
++);
114 if (atomic_read(&node
->refcnt
)) {
118 hfs_bnode_unhash(node
);
119 hfs_bnode_free(node
);
120 } while (--i
&& nidx
< tree
->node_count
);
121 spin_unlock(&tree
->hash_lock
);
123 return res
? try_to_free_buffers(page
) : 0;
126 static ssize_t
hfsplus_direct_IO(struct kiocb
*iocb
, struct iov_iter
*iter
)
128 struct file
*file
= iocb
->ki_filp
;
129 struct address_space
*mapping
= file
->f_mapping
;
130 struct inode
*inode
= mapping
->host
;
131 size_t count
= iov_iter_count(iter
);
134 ret
= blockdev_direct_IO(iocb
, inode
, iter
, hfsplus_get_block
);
137 * In case of error extending write may have instantiated a few
138 * blocks outside i_size. Trim these off again.
140 if (unlikely(iov_iter_rw(iter
) == WRITE
&& ret
< 0)) {
141 loff_t isize
= i_size_read(inode
);
142 loff_t end
= iocb
->ki_pos
+ count
;
145 hfsplus_write_failed(mapping
, end
);
151 static int hfsplus_writepages(struct address_space
*mapping
,
152 struct writeback_control
*wbc
)
154 return mpage_writepages(mapping
, wbc
, hfsplus_get_block
);
157 const struct address_space_operations hfsplus_btree_aops
= {
158 .readpage
= hfsplus_readpage
,
159 .writepage
= hfsplus_writepage
,
160 .write_begin
= hfsplus_write_begin
,
161 .write_end
= generic_write_end
,
162 .bmap
= hfsplus_bmap
,
163 .releasepage
= hfsplus_releasepage
,
166 const struct address_space_operations hfsplus_aops
= {
167 .readpage
= hfsplus_readpage
,
168 .writepage
= hfsplus_writepage
,
169 .write_begin
= hfsplus_write_begin
,
170 .write_end
= generic_write_end
,
171 .bmap
= hfsplus_bmap
,
172 .direct_IO
= hfsplus_direct_IO
,
173 .writepages
= hfsplus_writepages
,
176 const struct dentry_operations hfsplus_dentry_operations
= {
177 .d_hash
= hfsplus_hash_dentry
,
178 .d_compare
= hfsplus_compare_dentry
,
181 static void hfsplus_get_perms(struct inode
*inode
,
182 struct hfsplus_perm
*perms
, int dir
)
184 struct hfsplus_sb_info
*sbi
= HFSPLUS_SB(inode
->i_sb
);
187 mode
= be16_to_cpu(perms
->mode
);
189 i_uid_write(inode
, be32_to_cpu(perms
->owner
));
190 if (!i_uid_read(inode
) && !mode
)
191 inode
->i_uid
= sbi
->uid
;
193 i_gid_write(inode
, be32_to_cpu(perms
->group
));
194 if (!i_gid_read(inode
) && !mode
)
195 inode
->i_gid
= sbi
->gid
;
198 mode
= mode
? (mode
& S_IALLUGO
) : (S_IRWXUGO
& ~(sbi
->umask
));
201 mode
= S_IFREG
| ((S_IRUGO
|S_IWUGO
) & ~(sbi
->umask
));
202 inode
->i_mode
= mode
;
204 HFSPLUS_I(inode
)->userflags
= perms
->userflags
;
205 if (perms
->rootflags
& HFSPLUS_FLG_IMMUTABLE
)
206 inode
->i_flags
|= S_IMMUTABLE
;
208 inode
->i_flags
&= ~S_IMMUTABLE
;
209 if (perms
->rootflags
& HFSPLUS_FLG_APPEND
)
210 inode
->i_flags
|= S_APPEND
;
212 inode
->i_flags
&= ~S_APPEND
;
215 static int hfsplus_file_open(struct inode
*inode
, struct file
*file
)
217 if (HFSPLUS_IS_RSRC(inode
))
218 inode
= HFSPLUS_I(inode
)->rsrc_inode
;
219 if (!(file
->f_flags
& O_LARGEFILE
) && i_size_read(inode
) > MAX_NON_LFS
)
221 atomic_inc(&HFSPLUS_I(inode
)->opencnt
);
225 static int hfsplus_file_release(struct inode
*inode
, struct file
*file
)
227 struct super_block
*sb
= inode
->i_sb
;
229 if (HFSPLUS_IS_RSRC(inode
))
230 inode
= HFSPLUS_I(inode
)->rsrc_inode
;
231 if (atomic_dec_and_test(&HFSPLUS_I(inode
)->opencnt
)) {
233 hfsplus_file_truncate(inode
);
234 if (inode
->i_flags
& S_DEAD
) {
235 hfsplus_delete_cat(inode
->i_ino
,
236 HFSPLUS_SB(sb
)->hidden_dir
, NULL
);
237 hfsplus_delete_inode(inode
);
244 static int hfsplus_setattr(struct dentry
*dentry
, struct iattr
*attr
)
246 struct inode
*inode
= d_inode(dentry
);
249 error
= setattr_prepare(dentry
, attr
);
253 if ((attr
->ia_valid
& ATTR_SIZE
) &&
254 attr
->ia_size
!= i_size_read(inode
)) {
255 inode_dio_wait(inode
);
256 if (attr
->ia_size
> inode
->i_size
) {
257 error
= generic_cont_expand_simple(inode
,
262 truncate_setsize(inode
, attr
->ia_size
);
263 hfsplus_file_truncate(inode
);
266 setattr_copy(inode
, attr
);
267 mark_inode_dirty(inode
);
269 if (attr
->ia_valid
& ATTR_MODE
) {
270 error
= posix_acl_chmod(inode
, inode
->i_mode
);
278 int hfsplus_file_fsync(struct file
*file
, loff_t start
, loff_t end
,
281 struct inode
*inode
= file
->f_mapping
->host
;
282 struct hfsplus_inode_info
*hip
= HFSPLUS_I(inode
);
283 struct hfsplus_sb_info
*sbi
= HFSPLUS_SB(inode
->i_sb
);
284 int error
= 0, error2
;
286 error
= file_write_and_wait_range(file
, start
, end
);
292 * Sync inode metadata into the catalog and extent trees.
294 sync_inode_metadata(inode
, 1);
297 * And explicitly write out the btrees.
299 if (test_and_clear_bit(HFSPLUS_I_CAT_DIRTY
, &hip
->flags
))
300 error
= filemap_write_and_wait(sbi
->cat_tree
->inode
->i_mapping
);
302 if (test_and_clear_bit(HFSPLUS_I_EXT_DIRTY
, &hip
->flags
)) {
304 filemap_write_and_wait(sbi
->ext_tree
->inode
->i_mapping
);
309 if (test_and_clear_bit(HFSPLUS_I_ATTR_DIRTY
, &hip
->flags
)) {
310 if (sbi
->attr_tree
) {
312 filemap_write_and_wait(
313 sbi
->attr_tree
->inode
->i_mapping
);
317 pr_err("sync non-existent attributes tree\n");
321 if (test_and_clear_bit(HFSPLUS_I_ALLOC_DIRTY
, &hip
->flags
)) {
322 error2
= filemap_write_and_wait(sbi
->alloc_file
->i_mapping
);
327 if (!test_bit(HFSPLUS_SB_NOBARRIER
, &sbi
->flags
))
328 blkdev_issue_flush(inode
->i_sb
->s_bdev
, GFP_KERNEL
, NULL
);
335 static const struct inode_operations hfsplus_file_inode_operations
= {
336 .setattr
= hfsplus_setattr
,
337 .listxattr
= hfsplus_listxattr
,
338 #ifdef CONFIG_HFSPLUS_FS_POSIX_ACL
339 .get_acl
= hfsplus_get_posix_acl
,
340 .set_acl
= hfsplus_set_posix_acl
,
344 static const struct file_operations hfsplus_file_operations
= {
345 .llseek
= generic_file_llseek
,
346 .read_iter
= generic_file_read_iter
,
347 .write_iter
= generic_file_write_iter
,
348 .mmap
= generic_file_mmap
,
349 .splice_read
= generic_file_splice_read
,
350 .fsync
= hfsplus_file_fsync
,
351 .open
= hfsplus_file_open
,
352 .release
= hfsplus_file_release
,
353 .unlocked_ioctl
= hfsplus_ioctl
,
356 struct inode
*hfsplus_new_inode(struct super_block
*sb
, umode_t mode
)
358 struct hfsplus_sb_info
*sbi
= HFSPLUS_SB(sb
);
359 struct inode
*inode
= new_inode(sb
);
360 struct hfsplus_inode_info
*hip
;
365 inode
->i_ino
= sbi
->next_cnid
++;
366 inode
->i_mode
= mode
;
367 inode
->i_uid
= current_fsuid();
368 inode
->i_gid
= current_fsgid();
370 inode
->i_mtime
= inode
->i_atime
= inode
->i_ctime
= current_time(inode
);
372 hip
= HFSPLUS_I(inode
);
373 INIT_LIST_HEAD(&hip
->open_dir_list
);
374 spin_lock_init(&hip
->open_dir_lock
);
375 mutex_init(&hip
->extents_lock
);
376 atomic_set(&hip
->opencnt
, 0);
377 hip
->extent_state
= 0;
381 memset(hip
->first_extents
, 0, sizeof(hfsplus_extent_rec
));
382 memset(hip
->cached_extents
, 0, sizeof(hfsplus_extent_rec
));
383 hip
->alloc_blocks
= 0;
384 hip
->first_blocks
= 0;
385 hip
->cached_start
= 0;
386 hip
->cached_blocks
= 0;
389 hip
->rsrc_inode
= NULL
;
390 if (S_ISDIR(inode
->i_mode
)) {
393 inode
->i_op
= &hfsplus_dir_inode_operations
;
394 inode
->i_fop
= &hfsplus_dir_operations
;
395 } else if (S_ISREG(inode
->i_mode
)) {
397 inode
->i_op
= &hfsplus_file_inode_operations
;
398 inode
->i_fop
= &hfsplus_file_operations
;
399 inode
->i_mapping
->a_ops
= &hfsplus_aops
;
400 hip
->clump_blocks
= sbi
->data_clump_blocks
;
401 } else if (S_ISLNK(inode
->i_mode
)) {
403 inode
->i_op
= &page_symlink_inode_operations
;
404 inode_nohighmem(inode
);
405 inode
->i_mapping
->a_ops
= &hfsplus_aops
;
406 hip
->clump_blocks
= 1;
409 insert_inode_hash(inode
);
410 mark_inode_dirty(inode
);
411 hfsplus_mark_mdb_dirty(sb
);
416 void hfsplus_delete_inode(struct inode
*inode
)
418 struct super_block
*sb
= inode
->i_sb
;
420 if (S_ISDIR(inode
->i_mode
)) {
421 HFSPLUS_SB(sb
)->folder_count
--;
422 hfsplus_mark_mdb_dirty(sb
);
425 HFSPLUS_SB(sb
)->file_count
--;
426 if (S_ISREG(inode
->i_mode
)) {
427 if (!inode
->i_nlink
) {
429 hfsplus_file_truncate(inode
);
431 } else if (S_ISLNK(inode
->i_mode
)) {
433 hfsplus_file_truncate(inode
);
435 hfsplus_mark_mdb_dirty(sb
);
438 void hfsplus_inode_read_fork(struct inode
*inode
, struct hfsplus_fork_raw
*fork
)
440 struct super_block
*sb
= inode
->i_sb
;
441 struct hfsplus_sb_info
*sbi
= HFSPLUS_SB(sb
);
442 struct hfsplus_inode_info
*hip
= HFSPLUS_I(inode
);
446 memcpy(&hip
->first_extents
, &fork
->extents
, sizeof(hfsplus_extent_rec
));
447 for (count
= 0, i
= 0; i
< 8; i
++)
448 count
+= be32_to_cpu(fork
->extents
[i
].block_count
);
449 hip
->first_blocks
= count
;
450 memset(hip
->cached_extents
, 0, sizeof(hfsplus_extent_rec
));
451 hip
->cached_start
= 0;
452 hip
->cached_blocks
= 0;
454 hip
->alloc_blocks
= be32_to_cpu(fork
->total_blocks
);
455 hip
->phys_size
= inode
->i_size
= be64_to_cpu(fork
->total_size
);
457 (inode
->i_size
+ sb
->s_blocksize
- 1) >> sb
->s_blocksize_bits
;
458 inode_set_bytes(inode
, hip
->fs_blocks
<< sb
->s_blocksize_bits
);
460 be32_to_cpu(fork
->clump_size
) >> sbi
->alloc_blksz_shift
;
461 if (!hip
->clump_blocks
) {
462 hip
->clump_blocks
= HFSPLUS_IS_RSRC(inode
) ?
463 sbi
->rsrc_clump_blocks
:
464 sbi
->data_clump_blocks
;
468 void hfsplus_inode_write_fork(struct inode
*inode
,
469 struct hfsplus_fork_raw
*fork
)
471 memcpy(&fork
->extents
, &HFSPLUS_I(inode
)->first_extents
,
472 sizeof(hfsplus_extent_rec
));
473 fork
->total_size
= cpu_to_be64(inode
->i_size
);
474 fork
->total_blocks
= cpu_to_be32(HFSPLUS_I(inode
)->alloc_blocks
);
477 int hfsplus_cat_read_inode(struct inode
*inode
, struct hfs_find_data
*fd
)
479 hfsplus_cat_entry entry
;
483 type
= hfs_bnode_read_u16(fd
->bnode
, fd
->entryoffset
);
485 HFSPLUS_I(inode
)->linkid
= 0;
486 if (type
== HFSPLUS_FOLDER
) {
487 struct hfsplus_cat_folder
*folder
= &entry
.folder
;
489 if (fd
->entrylength
< sizeof(struct hfsplus_cat_folder
))
491 hfs_bnode_read(fd
->bnode
, &entry
, fd
->entryoffset
,
492 sizeof(struct hfsplus_cat_folder
));
493 hfsplus_get_perms(inode
, &folder
->permissions
, 1);
495 inode
->i_size
= 2 + be32_to_cpu(folder
->valence
);
496 inode
->i_atime
= hfsp_mt2ut(folder
->access_date
);
497 inode
->i_mtime
= hfsp_mt2ut(folder
->content_mod_date
);
498 inode
->i_ctime
= hfsp_mt2ut(folder
->attribute_mod_date
);
499 HFSPLUS_I(inode
)->create_date
= folder
->create_date
;
500 HFSPLUS_I(inode
)->fs_blocks
= 0;
501 if (folder
->flags
& cpu_to_be16(HFSPLUS_HAS_FOLDER_COUNT
)) {
502 HFSPLUS_I(inode
)->subfolders
=
503 be32_to_cpu(folder
->subfolders
);
505 inode
->i_op
= &hfsplus_dir_inode_operations
;
506 inode
->i_fop
= &hfsplus_dir_operations
;
507 } else if (type
== HFSPLUS_FILE
) {
508 struct hfsplus_cat_file
*file
= &entry
.file
;
510 if (fd
->entrylength
< sizeof(struct hfsplus_cat_file
))
512 hfs_bnode_read(fd
->bnode
, &entry
, fd
->entryoffset
,
513 sizeof(struct hfsplus_cat_file
));
515 hfsplus_inode_read_fork(inode
, HFSPLUS_IS_RSRC(inode
) ?
516 &file
->rsrc_fork
: &file
->data_fork
);
517 hfsplus_get_perms(inode
, &file
->permissions
, 0);
519 if (S_ISREG(inode
->i_mode
)) {
520 if (file
->permissions
.dev
)
522 be32_to_cpu(file
->permissions
.dev
));
523 inode
->i_op
= &hfsplus_file_inode_operations
;
524 inode
->i_fop
= &hfsplus_file_operations
;
525 inode
->i_mapping
->a_ops
= &hfsplus_aops
;
526 } else if (S_ISLNK(inode
->i_mode
)) {
527 inode
->i_op
= &page_symlink_inode_operations
;
528 inode_nohighmem(inode
);
529 inode
->i_mapping
->a_ops
= &hfsplus_aops
;
531 init_special_inode(inode
, inode
->i_mode
,
532 be32_to_cpu(file
->permissions
.dev
));
534 inode
->i_atime
= hfsp_mt2ut(file
->access_date
);
535 inode
->i_mtime
= hfsp_mt2ut(file
->content_mod_date
);
536 inode
->i_ctime
= hfsp_mt2ut(file
->attribute_mod_date
);
537 HFSPLUS_I(inode
)->create_date
= file
->create_date
;
539 pr_err("bad catalog entry used to create inode\n");
545 int hfsplus_cat_write_inode(struct inode
*inode
)
547 struct inode
*main_inode
= inode
;
548 struct hfs_find_data fd
;
549 hfsplus_cat_entry entry
;
551 if (HFSPLUS_IS_RSRC(inode
))
552 main_inode
= HFSPLUS_I(inode
)->rsrc_inode
;
554 if (!main_inode
->i_nlink
)
557 if (hfs_find_init(HFSPLUS_SB(main_inode
->i_sb
)->cat_tree
, &fd
))
561 if (hfsplus_find_cat(main_inode
->i_sb
, main_inode
->i_ino
, &fd
))
565 if (S_ISDIR(main_inode
->i_mode
)) {
566 struct hfsplus_cat_folder
*folder
= &entry
.folder
;
568 if (fd
.entrylength
< sizeof(struct hfsplus_cat_folder
))
570 hfs_bnode_read(fd
.bnode
, &entry
, fd
.entryoffset
,
571 sizeof(struct hfsplus_cat_folder
));
572 /* simple node checks? */
573 hfsplus_cat_set_perms(inode
, &folder
->permissions
);
574 folder
->access_date
= hfsp_ut2mt(inode
->i_atime
);
575 folder
->content_mod_date
= hfsp_ut2mt(inode
->i_mtime
);
576 folder
->attribute_mod_date
= hfsp_ut2mt(inode
->i_ctime
);
577 folder
->valence
= cpu_to_be32(inode
->i_size
- 2);
578 if (folder
->flags
& cpu_to_be16(HFSPLUS_HAS_FOLDER_COUNT
)) {
580 cpu_to_be32(HFSPLUS_I(inode
)->subfolders
);
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
);