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/uio.h>
19 #include "hfsplus_fs.h"
20 #include "hfsplus_raw.h"
24 static int hfsplus_readpage(struct file
*file
, struct page
*page
)
26 return block_read_full_page(page
, hfsplus_get_block
);
29 static int hfsplus_writepage(struct page
*page
, struct writeback_control
*wbc
)
31 return block_write_full_page(page
, hfsplus_get_block
, wbc
);
34 static void hfsplus_write_failed(struct address_space
*mapping
, loff_t to
)
36 struct inode
*inode
= mapping
->host
;
38 if (to
> inode
->i_size
) {
39 truncate_pagecache(inode
, inode
->i_size
);
40 hfsplus_file_truncate(inode
);
44 static int hfsplus_write_begin(struct file
*file
, struct address_space
*mapping
,
45 loff_t pos
, unsigned len
, unsigned flags
,
46 struct page
**pagep
, void **fsdata
)
51 ret
= cont_write_begin(file
, mapping
, pos
, len
, flags
, pagep
, fsdata
,
53 &HFSPLUS_I(mapping
->host
)->phys_size
);
55 hfsplus_write_failed(mapping
, pos
+ len
);
60 static sector_t
hfsplus_bmap(struct address_space
*mapping
, sector_t block
)
62 return generic_block_bmap(mapping
, block
, hfsplus_get_block
);
65 static int hfsplus_releasepage(struct page
*page
, gfp_t mask
)
67 struct inode
*inode
= page
->mapping
->host
;
68 struct super_block
*sb
= inode
->i_sb
;
69 struct hfs_btree
*tree
;
70 struct hfs_bnode
*node
;
74 switch (inode
->i_ino
) {
75 case HFSPLUS_EXT_CNID
:
76 tree
= HFSPLUS_SB(sb
)->ext_tree
;
78 case HFSPLUS_CAT_CNID
:
79 tree
= HFSPLUS_SB(sb
)->cat_tree
;
81 case HFSPLUS_ATTR_CNID
:
82 tree
= HFSPLUS_SB(sb
)->attr_tree
;
90 if (tree
->node_size
>= PAGE_CACHE_SIZE
) {
92 (tree
->node_size_shift
- PAGE_CACHE_SHIFT
);
93 spin_lock(&tree
->hash_lock
);
94 node
= hfs_bnode_findhash(tree
, nidx
);
97 else if (atomic_read(&node
->refcnt
))
100 hfs_bnode_unhash(node
);
101 hfs_bnode_free(node
);
103 spin_unlock(&tree
->hash_lock
);
105 nidx
= page
->index
<<
106 (PAGE_CACHE_SHIFT
- tree
->node_size_shift
);
107 i
= 1 << (PAGE_CACHE_SHIFT
- tree
->node_size_shift
);
108 spin_lock(&tree
->hash_lock
);
110 node
= hfs_bnode_findhash(tree
, nidx
++);
113 if (atomic_read(&node
->refcnt
)) {
117 hfs_bnode_unhash(node
);
118 hfs_bnode_free(node
);
119 } while (--i
&& nidx
< tree
->node_count
);
120 spin_unlock(&tree
->hash_lock
);
122 return res
? try_to_free_buffers(page
) : 0;
125 static ssize_t
hfsplus_direct_IO(int rw
, struct kiocb
*iocb
,
126 struct iov_iter
*iter
, loff_t offset
)
128 struct file
*file
= iocb
->ki_filp
;
129 struct address_space
*mapping
= file
->f_mapping
;
130 struct inode
*inode
= file_inode(file
)->i_mapping
->host
;
131 size_t count
= iov_iter_count(iter
);
134 ret
= blockdev_direct_IO(iocb
, inode
, iter
, offset
, 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
= offset
+ 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
)) {
232 mutex_lock(&inode
->i_mutex
);
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
);
239 mutex_unlock(&inode
->i_mutex
);
244 static int hfsplus_setattr(struct dentry
*dentry
, struct iattr
*attr
)
246 struct inode
*inode
= dentry
->d_inode
;
249 error
= inode_change_ok(inode
, attr
);
253 if ((attr
->ia_valid
& ATTR_SIZE
) &&
254 attr
->ia_size
!= i_size_read(inode
)) {
255 inode_dio_wait(inode
);
256 truncate_setsize(inode
, attr
->ia_size
);
257 hfsplus_file_truncate(inode
);
260 setattr_copy(inode
, attr
);
261 mark_inode_dirty(inode
);
263 if (attr
->ia_valid
& ATTR_MODE
) {
264 error
= posix_acl_chmod(inode
, inode
->i_mode
);
272 int hfsplus_file_fsync(struct file
*file
, loff_t start
, loff_t end
,
275 struct inode
*inode
= file
->f_mapping
->host
;
276 struct hfsplus_inode_info
*hip
= HFSPLUS_I(inode
);
277 struct hfsplus_sb_info
*sbi
= HFSPLUS_SB(inode
->i_sb
);
278 int error
= 0, error2
;
280 error
= filemap_write_and_wait_range(inode
->i_mapping
, start
, end
);
283 mutex_lock(&inode
->i_mutex
);
286 * Sync inode metadata into the catalog and extent trees.
288 sync_inode_metadata(inode
, 1);
291 * And explicitly write out the btrees.
293 if (test_and_clear_bit(HFSPLUS_I_CAT_DIRTY
, &hip
->flags
))
294 error
= filemap_write_and_wait(sbi
->cat_tree
->inode
->i_mapping
);
296 if (test_and_clear_bit(HFSPLUS_I_EXT_DIRTY
, &hip
->flags
)) {
298 filemap_write_and_wait(sbi
->ext_tree
->inode
->i_mapping
);
303 if (test_and_clear_bit(HFSPLUS_I_ATTR_DIRTY
, &hip
->flags
)) {
304 if (sbi
->attr_tree
) {
306 filemap_write_and_wait(
307 sbi
->attr_tree
->inode
->i_mapping
);
311 pr_err("sync non-existent attributes tree\n");
315 if (test_and_clear_bit(HFSPLUS_I_ALLOC_DIRTY
, &hip
->flags
)) {
316 error2
= filemap_write_and_wait(sbi
->alloc_file
->i_mapping
);
321 if (!test_bit(HFSPLUS_SB_NOBARRIER
, &sbi
->flags
))
322 blkdev_issue_flush(inode
->i_sb
->s_bdev
, GFP_KERNEL
, NULL
);
324 mutex_unlock(&inode
->i_mutex
);
329 static const struct inode_operations hfsplus_file_inode_operations
= {
330 .setattr
= hfsplus_setattr
,
331 .setxattr
= generic_setxattr
,
332 .getxattr
= generic_getxattr
,
333 .listxattr
= hfsplus_listxattr
,
334 .removexattr
= generic_removexattr
,
335 #ifdef CONFIG_HFSPLUS_FS_POSIX_ACL
336 .get_acl
= hfsplus_get_posix_acl
,
337 .set_acl
= hfsplus_set_posix_acl
,
341 static const struct file_operations hfsplus_file_operations
= {
342 .llseek
= generic_file_llseek
,
343 .read_iter
= generic_file_read_iter
,
344 .write_iter
= generic_file_write_iter
,
345 .mmap
= generic_file_mmap
,
346 .splice_read
= generic_file_splice_read
,
347 .fsync
= hfsplus_file_fsync
,
348 .open
= hfsplus_file_open
,
349 .release
= hfsplus_file_release
,
350 .unlocked_ioctl
= hfsplus_ioctl
,
353 struct inode
*hfsplus_new_inode(struct super_block
*sb
, umode_t mode
)
355 struct hfsplus_sb_info
*sbi
= HFSPLUS_SB(sb
);
356 struct inode
*inode
= new_inode(sb
);
357 struct hfsplus_inode_info
*hip
;
362 inode
->i_ino
= sbi
->next_cnid
++;
363 inode
->i_mode
= mode
;
364 inode
->i_uid
= current_fsuid();
365 inode
->i_gid
= current_fsgid();
367 inode
->i_mtime
= inode
->i_atime
= inode
->i_ctime
= CURRENT_TIME_SEC
;
369 hip
= HFSPLUS_I(inode
);
370 INIT_LIST_HEAD(&hip
->open_dir_list
);
371 mutex_init(&hip
->extents_lock
);
372 atomic_set(&hip
->opencnt
, 0);
373 hip
->extent_state
= 0;
377 memset(hip
->first_extents
, 0, sizeof(hfsplus_extent_rec
));
378 memset(hip
->cached_extents
, 0, sizeof(hfsplus_extent_rec
));
379 hip
->alloc_blocks
= 0;
380 hip
->first_blocks
= 0;
381 hip
->cached_start
= 0;
382 hip
->cached_blocks
= 0;
385 hip
->rsrc_inode
= NULL
;
386 if (S_ISDIR(inode
->i_mode
)) {
389 inode
->i_op
= &hfsplus_dir_inode_operations
;
390 inode
->i_fop
= &hfsplus_dir_operations
;
391 } else if (S_ISREG(inode
->i_mode
)) {
393 inode
->i_op
= &hfsplus_file_inode_operations
;
394 inode
->i_fop
= &hfsplus_file_operations
;
395 inode
->i_mapping
->a_ops
= &hfsplus_aops
;
396 hip
->clump_blocks
= sbi
->data_clump_blocks
;
397 } else if (S_ISLNK(inode
->i_mode
)) {
399 inode
->i_op
= &page_symlink_inode_operations
;
400 inode
->i_mapping
->a_ops
= &hfsplus_aops
;
401 hip
->clump_blocks
= 1;
404 insert_inode_hash(inode
);
405 mark_inode_dirty(inode
);
406 hfsplus_mark_mdb_dirty(sb
);
411 void hfsplus_delete_inode(struct inode
*inode
)
413 struct super_block
*sb
= inode
->i_sb
;
415 if (S_ISDIR(inode
->i_mode
)) {
416 HFSPLUS_SB(sb
)->folder_count
--;
417 hfsplus_mark_mdb_dirty(sb
);
420 HFSPLUS_SB(sb
)->file_count
--;
421 if (S_ISREG(inode
->i_mode
)) {
422 if (!inode
->i_nlink
) {
424 hfsplus_file_truncate(inode
);
426 } else if (S_ISLNK(inode
->i_mode
)) {
428 hfsplus_file_truncate(inode
);
430 hfsplus_mark_mdb_dirty(sb
);
433 void hfsplus_inode_read_fork(struct inode
*inode
, struct hfsplus_fork_raw
*fork
)
435 struct super_block
*sb
= inode
->i_sb
;
436 struct hfsplus_sb_info
*sbi
= HFSPLUS_SB(sb
);
437 struct hfsplus_inode_info
*hip
= HFSPLUS_I(inode
);
441 memcpy(&hip
->first_extents
, &fork
->extents
, sizeof(hfsplus_extent_rec
));
442 for (count
= 0, i
= 0; i
< 8; i
++)
443 count
+= be32_to_cpu(fork
->extents
[i
].block_count
);
444 hip
->first_blocks
= count
;
445 memset(hip
->cached_extents
, 0, sizeof(hfsplus_extent_rec
));
446 hip
->cached_start
= 0;
447 hip
->cached_blocks
= 0;
449 hip
->alloc_blocks
= be32_to_cpu(fork
->total_blocks
);
450 hip
->phys_size
= inode
->i_size
= be64_to_cpu(fork
->total_size
);
452 (inode
->i_size
+ sb
->s_blocksize
- 1) >> sb
->s_blocksize_bits
;
453 inode_set_bytes(inode
, hip
->fs_blocks
<< sb
->s_blocksize_bits
);
455 be32_to_cpu(fork
->clump_size
) >> sbi
->alloc_blksz_shift
;
456 if (!hip
->clump_blocks
) {
457 hip
->clump_blocks
= HFSPLUS_IS_RSRC(inode
) ?
458 sbi
->rsrc_clump_blocks
:
459 sbi
->data_clump_blocks
;
463 void hfsplus_inode_write_fork(struct inode
*inode
,
464 struct hfsplus_fork_raw
*fork
)
466 memcpy(&fork
->extents
, &HFSPLUS_I(inode
)->first_extents
,
467 sizeof(hfsplus_extent_rec
));
468 fork
->total_size
= cpu_to_be64(inode
->i_size
);
469 fork
->total_blocks
= cpu_to_be32(HFSPLUS_I(inode
)->alloc_blocks
);
472 int hfsplus_cat_read_inode(struct inode
*inode
, struct hfs_find_data
*fd
)
474 hfsplus_cat_entry entry
;
478 type
= hfs_bnode_read_u16(fd
->bnode
, fd
->entryoffset
);
480 HFSPLUS_I(inode
)->linkid
= 0;
481 if (type
== HFSPLUS_FOLDER
) {
482 struct hfsplus_cat_folder
*folder
= &entry
.folder
;
484 if (fd
->entrylength
< sizeof(struct hfsplus_cat_folder
))
486 hfs_bnode_read(fd
->bnode
, &entry
, fd
->entryoffset
,
487 sizeof(struct hfsplus_cat_folder
));
488 hfsplus_get_perms(inode
, &folder
->permissions
, 1);
490 inode
->i_size
= 2 + be32_to_cpu(folder
->valence
);
491 inode
->i_atime
= hfsp_mt2ut(folder
->access_date
);
492 inode
->i_mtime
= hfsp_mt2ut(folder
->content_mod_date
);
493 inode
->i_ctime
= hfsp_mt2ut(folder
->attribute_mod_date
);
494 HFSPLUS_I(inode
)->create_date
= folder
->create_date
;
495 HFSPLUS_I(inode
)->fs_blocks
= 0;
496 if (folder
->flags
& cpu_to_be16(HFSPLUS_HAS_FOLDER_COUNT
)) {
497 HFSPLUS_I(inode
)->subfolders
=
498 be32_to_cpu(folder
->subfolders
);
500 inode
->i_op
= &hfsplus_dir_inode_operations
;
501 inode
->i_fop
= &hfsplus_dir_operations
;
502 } else if (type
== HFSPLUS_FILE
) {
503 struct hfsplus_cat_file
*file
= &entry
.file
;
505 if (fd
->entrylength
< sizeof(struct hfsplus_cat_file
))
507 hfs_bnode_read(fd
->bnode
, &entry
, fd
->entryoffset
,
508 sizeof(struct hfsplus_cat_file
));
510 hfsplus_inode_read_fork(inode
, HFSPLUS_IS_RSRC(inode
) ?
511 &file
->rsrc_fork
: &file
->data_fork
);
512 hfsplus_get_perms(inode
, &file
->permissions
, 0);
514 if (S_ISREG(inode
->i_mode
)) {
515 if (file
->permissions
.dev
)
517 be32_to_cpu(file
->permissions
.dev
));
518 inode
->i_op
= &hfsplus_file_inode_operations
;
519 inode
->i_fop
= &hfsplus_file_operations
;
520 inode
->i_mapping
->a_ops
= &hfsplus_aops
;
521 } else if (S_ISLNK(inode
->i_mode
)) {
522 inode
->i_op
= &page_symlink_inode_operations
;
523 inode
->i_mapping
->a_ops
= &hfsplus_aops
;
525 init_special_inode(inode
, inode
->i_mode
,
526 be32_to_cpu(file
->permissions
.dev
));
528 inode
->i_atime
= hfsp_mt2ut(file
->access_date
);
529 inode
->i_mtime
= hfsp_mt2ut(file
->content_mod_date
);
530 inode
->i_ctime
= hfsp_mt2ut(file
->attribute_mod_date
);
531 HFSPLUS_I(inode
)->create_date
= file
->create_date
;
533 pr_err("bad catalog entry used to create inode\n");
539 int hfsplus_cat_write_inode(struct inode
*inode
)
541 struct inode
*main_inode
= inode
;
542 struct hfs_find_data fd
;
543 hfsplus_cat_entry entry
;
545 if (HFSPLUS_IS_RSRC(inode
))
546 main_inode
= HFSPLUS_I(inode
)->rsrc_inode
;
548 if (!main_inode
->i_nlink
)
551 if (hfs_find_init(HFSPLUS_SB(main_inode
->i_sb
)->cat_tree
, &fd
))
555 if (hfsplus_find_cat(main_inode
->i_sb
, main_inode
->i_ino
, &fd
))
559 if (S_ISDIR(main_inode
->i_mode
)) {
560 struct hfsplus_cat_folder
*folder
= &entry
.folder
;
562 if (fd
.entrylength
< sizeof(struct hfsplus_cat_folder
))
564 hfs_bnode_read(fd
.bnode
, &entry
, fd
.entryoffset
,
565 sizeof(struct hfsplus_cat_folder
));
566 /* simple node checks? */
567 hfsplus_cat_set_perms(inode
, &folder
->permissions
);
568 folder
->access_date
= hfsp_ut2mt(inode
->i_atime
);
569 folder
->content_mod_date
= hfsp_ut2mt(inode
->i_mtime
);
570 folder
->attribute_mod_date
= hfsp_ut2mt(inode
->i_ctime
);
571 folder
->valence
= cpu_to_be32(inode
->i_size
- 2);
572 if (folder
->flags
& cpu_to_be16(HFSPLUS_HAS_FOLDER_COUNT
)) {
574 cpu_to_be32(HFSPLUS_I(inode
)->subfolders
);
576 hfs_bnode_write(fd
.bnode
, &entry
, fd
.entryoffset
,
577 sizeof(struct hfsplus_cat_folder
));
578 } else if (HFSPLUS_IS_RSRC(inode
)) {
579 struct hfsplus_cat_file
*file
= &entry
.file
;
580 hfs_bnode_read(fd
.bnode
, &entry
, fd
.entryoffset
,
581 sizeof(struct hfsplus_cat_file
));
582 hfsplus_inode_write_fork(inode
, &file
->rsrc_fork
);
583 hfs_bnode_write(fd
.bnode
, &entry
, fd
.entryoffset
,
584 sizeof(struct hfsplus_cat_file
));
586 struct hfsplus_cat_file
*file
= &entry
.file
;
588 if (fd
.entrylength
< sizeof(struct hfsplus_cat_file
))
590 hfs_bnode_read(fd
.bnode
, &entry
, fd
.entryoffset
,
591 sizeof(struct hfsplus_cat_file
));
592 hfsplus_inode_write_fork(inode
, &file
->data_fork
);
593 hfsplus_cat_set_perms(inode
, &file
->permissions
);
594 if (HFSPLUS_FLG_IMMUTABLE
&
595 (file
->permissions
.rootflags
|
596 file
->permissions
.userflags
))
597 file
->flags
|= cpu_to_be16(HFSPLUS_FILE_LOCKED
);
599 file
->flags
&= cpu_to_be16(~HFSPLUS_FILE_LOCKED
);
600 file
->access_date
= hfsp_ut2mt(inode
->i_atime
);
601 file
->content_mod_date
= hfsp_ut2mt(inode
->i_mtime
);
602 file
->attribute_mod_date
= hfsp_ut2mt(inode
->i_ctime
);
603 hfs_bnode_write(fd
.bnode
, &entry
, fd
.entryoffset
,
604 sizeof(struct hfsplus_cat_file
));
607 set_bit(HFSPLUS_I_CAT_DIRTY
, &HFSPLUS_I(inode
)->flags
);