1 // SPDX-License-Identifier: GPL-2.0
3 * linux/fs/hfsplus/inode.c
6 * Brad Boyer (flar@allandria.com)
7 * (C) 2003 Ardis Technologies <roman@ardistech.com>
9 * Inode handling routines
12 #include <linux/blkdev.h>
15 #include <linux/pagemap.h>
16 #include <linux/mpage.h>
17 #include <linux/sched.h>
18 #include <linux/cred.h>
19 #include <linux/uio.h>
21 #include "hfsplus_fs.h"
22 #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
);
264 inode
->i_mtime
= inode
->i_ctime
= current_time(inode
);
267 setattr_copy(inode
, attr
);
268 mark_inode_dirty(inode
);
273 int hfsplus_getattr(const struct path
*path
, struct kstat
*stat
,
274 u32 request_mask
, unsigned int query_flags
)
276 struct inode
*inode
= d_inode(path
->dentry
);
277 struct hfsplus_inode_info
*hip
= HFSPLUS_I(inode
);
279 if (inode
->i_flags
& S_APPEND
)
280 stat
->attributes
|= STATX_ATTR_APPEND
;
281 if (inode
->i_flags
& S_IMMUTABLE
)
282 stat
->attributes
|= STATX_ATTR_IMMUTABLE
;
283 if (hip
->userflags
& HFSPLUS_FLG_NODUMP
)
284 stat
->attributes
|= STATX_ATTR_NODUMP
;
286 stat
->attributes_mask
|= STATX_ATTR_APPEND
| STATX_ATTR_IMMUTABLE
|
289 generic_fillattr(inode
, stat
);
293 int hfsplus_file_fsync(struct file
*file
, loff_t start
, loff_t end
,
296 struct inode
*inode
= file
->f_mapping
->host
;
297 struct hfsplus_inode_info
*hip
= HFSPLUS_I(inode
);
298 struct hfsplus_sb_info
*sbi
= HFSPLUS_SB(inode
->i_sb
);
299 int error
= 0, error2
;
301 error
= file_write_and_wait_range(file
, start
, end
);
307 * Sync inode metadata into the catalog and extent trees.
309 sync_inode_metadata(inode
, 1);
312 * And explicitly write out the btrees.
314 if (test_and_clear_bit(HFSPLUS_I_CAT_DIRTY
, &hip
->flags
))
315 error
= filemap_write_and_wait(sbi
->cat_tree
->inode
->i_mapping
);
317 if (test_and_clear_bit(HFSPLUS_I_EXT_DIRTY
, &hip
->flags
)) {
319 filemap_write_and_wait(sbi
->ext_tree
->inode
->i_mapping
);
324 if (test_and_clear_bit(HFSPLUS_I_ATTR_DIRTY
, &hip
->flags
)) {
325 if (sbi
->attr_tree
) {
327 filemap_write_and_wait(
328 sbi
->attr_tree
->inode
->i_mapping
);
332 pr_err("sync non-existent attributes tree\n");
336 if (test_and_clear_bit(HFSPLUS_I_ALLOC_DIRTY
, &hip
->flags
)) {
337 error2
= filemap_write_and_wait(sbi
->alloc_file
->i_mapping
);
342 if (!test_bit(HFSPLUS_SB_NOBARRIER
, &sbi
->flags
))
343 blkdev_issue_flush(inode
->i_sb
->s_bdev
, GFP_KERNEL
, NULL
);
350 static const struct inode_operations hfsplus_file_inode_operations
= {
351 .setattr
= hfsplus_setattr
,
352 .getattr
= hfsplus_getattr
,
353 .listxattr
= hfsplus_listxattr
,
356 static const struct file_operations hfsplus_file_operations
= {
357 .llseek
= generic_file_llseek
,
358 .read_iter
= generic_file_read_iter
,
359 .write_iter
= generic_file_write_iter
,
360 .mmap
= generic_file_mmap
,
361 .splice_read
= generic_file_splice_read
,
362 .fsync
= hfsplus_file_fsync
,
363 .open
= hfsplus_file_open
,
364 .release
= hfsplus_file_release
,
365 .unlocked_ioctl
= hfsplus_ioctl
,
368 struct inode
*hfsplus_new_inode(struct super_block
*sb
, struct inode
*dir
,
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_init_owner(inode
, dir
, mode
);
381 inode
->i_mtime
= inode
->i_atime
= inode
->i_ctime
= current_time(inode
);
383 hip
= HFSPLUS_I(inode
);
384 INIT_LIST_HEAD(&hip
->open_dir_list
);
385 spin_lock_init(&hip
->open_dir_lock
);
386 mutex_init(&hip
->extents_lock
);
387 atomic_set(&hip
->opencnt
, 0);
388 hip
->extent_state
= 0;
392 memset(hip
->first_extents
, 0, sizeof(hfsplus_extent_rec
));
393 memset(hip
->cached_extents
, 0, sizeof(hfsplus_extent_rec
));
394 hip
->alloc_blocks
= 0;
395 hip
->first_blocks
= 0;
396 hip
->cached_start
= 0;
397 hip
->cached_blocks
= 0;
400 hip
->rsrc_inode
= NULL
;
401 if (S_ISDIR(inode
->i_mode
)) {
404 inode
->i_op
= &hfsplus_dir_inode_operations
;
405 inode
->i_fop
= &hfsplus_dir_operations
;
406 } else if (S_ISREG(inode
->i_mode
)) {
408 inode
->i_op
= &hfsplus_file_inode_operations
;
409 inode
->i_fop
= &hfsplus_file_operations
;
410 inode
->i_mapping
->a_ops
= &hfsplus_aops
;
411 hip
->clump_blocks
= sbi
->data_clump_blocks
;
412 } else if (S_ISLNK(inode
->i_mode
)) {
414 inode
->i_op
= &page_symlink_inode_operations
;
415 inode_nohighmem(inode
);
416 inode
->i_mapping
->a_ops
= &hfsplus_aops
;
417 hip
->clump_blocks
= 1;
420 insert_inode_hash(inode
);
421 mark_inode_dirty(inode
);
422 hfsplus_mark_mdb_dirty(sb
);
427 void hfsplus_delete_inode(struct inode
*inode
)
429 struct super_block
*sb
= inode
->i_sb
;
431 if (S_ISDIR(inode
->i_mode
)) {
432 HFSPLUS_SB(sb
)->folder_count
--;
433 hfsplus_mark_mdb_dirty(sb
);
436 HFSPLUS_SB(sb
)->file_count
--;
437 if (S_ISREG(inode
->i_mode
)) {
438 if (!inode
->i_nlink
) {
440 hfsplus_file_truncate(inode
);
442 } else if (S_ISLNK(inode
->i_mode
)) {
444 hfsplus_file_truncate(inode
);
446 hfsplus_mark_mdb_dirty(sb
);
449 void hfsplus_inode_read_fork(struct inode
*inode
, struct hfsplus_fork_raw
*fork
)
451 struct super_block
*sb
= inode
->i_sb
;
452 struct hfsplus_sb_info
*sbi
= HFSPLUS_SB(sb
);
453 struct hfsplus_inode_info
*hip
= HFSPLUS_I(inode
);
457 memcpy(&hip
->first_extents
, &fork
->extents
, sizeof(hfsplus_extent_rec
));
458 for (count
= 0, i
= 0; i
< 8; i
++)
459 count
+= be32_to_cpu(fork
->extents
[i
].block_count
);
460 hip
->first_blocks
= count
;
461 memset(hip
->cached_extents
, 0, sizeof(hfsplus_extent_rec
));
462 hip
->cached_start
= 0;
463 hip
->cached_blocks
= 0;
465 hip
->alloc_blocks
= be32_to_cpu(fork
->total_blocks
);
466 hip
->phys_size
= inode
->i_size
= be64_to_cpu(fork
->total_size
);
468 (inode
->i_size
+ sb
->s_blocksize
- 1) >> sb
->s_blocksize_bits
;
469 inode_set_bytes(inode
, hip
->fs_blocks
<< sb
->s_blocksize_bits
);
471 be32_to_cpu(fork
->clump_size
) >> sbi
->alloc_blksz_shift
;
472 if (!hip
->clump_blocks
) {
473 hip
->clump_blocks
= HFSPLUS_IS_RSRC(inode
) ?
474 sbi
->rsrc_clump_blocks
:
475 sbi
->data_clump_blocks
;
479 void hfsplus_inode_write_fork(struct inode
*inode
,
480 struct hfsplus_fork_raw
*fork
)
482 memcpy(&fork
->extents
, &HFSPLUS_I(inode
)->first_extents
,
483 sizeof(hfsplus_extent_rec
));
484 fork
->total_size
= cpu_to_be64(inode
->i_size
);
485 fork
->total_blocks
= cpu_to_be32(HFSPLUS_I(inode
)->alloc_blocks
);
488 int hfsplus_cat_read_inode(struct inode
*inode
, struct hfs_find_data
*fd
)
490 hfsplus_cat_entry entry
;
494 type
= hfs_bnode_read_u16(fd
->bnode
, fd
->entryoffset
);
496 HFSPLUS_I(inode
)->linkid
= 0;
497 if (type
== HFSPLUS_FOLDER
) {
498 struct hfsplus_cat_folder
*folder
= &entry
.folder
;
500 if (fd
->entrylength
< sizeof(struct hfsplus_cat_folder
))
502 hfs_bnode_read(fd
->bnode
, &entry
, fd
->entryoffset
,
503 sizeof(struct hfsplus_cat_folder
));
504 hfsplus_get_perms(inode
, &folder
->permissions
, 1);
506 inode
->i_size
= 2 + be32_to_cpu(folder
->valence
);
507 inode
->i_atime
= hfsp_mt2ut(folder
->access_date
);
508 inode
->i_mtime
= hfsp_mt2ut(folder
->content_mod_date
);
509 inode
->i_ctime
= hfsp_mt2ut(folder
->attribute_mod_date
);
510 HFSPLUS_I(inode
)->create_date
= folder
->create_date
;
511 HFSPLUS_I(inode
)->fs_blocks
= 0;
512 if (folder
->flags
& cpu_to_be16(HFSPLUS_HAS_FOLDER_COUNT
)) {
513 HFSPLUS_I(inode
)->subfolders
=
514 be32_to_cpu(folder
->subfolders
);
516 inode
->i_op
= &hfsplus_dir_inode_operations
;
517 inode
->i_fop
= &hfsplus_dir_operations
;
518 } else if (type
== HFSPLUS_FILE
) {
519 struct hfsplus_cat_file
*file
= &entry
.file
;
521 if (fd
->entrylength
< sizeof(struct hfsplus_cat_file
))
523 hfs_bnode_read(fd
->bnode
, &entry
, fd
->entryoffset
,
524 sizeof(struct hfsplus_cat_file
));
526 hfsplus_inode_read_fork(inode
, HFSPLUS_IS_RSRC(inode
) ?
527 &file
->rsrc_fork
: &file
->data_fork
);
528 hfsplus_get_perms(inode
, &file
->permissions
, 0);
530 if (S_ISREG(inode
->i_mode
)) {
531 if (file
->permissions
.dev
)
533 be32_to_cpu(file
->permissions
.dev
));
534 inode
->i_op
= &hfsplus_file_inode_operations
;
535 inode
->i_fop
= &hfsplus_file_operations
;
536 inode
->i_mapping
->a_ops
= &hfsplus_aops
;
537 } else if (S_ISLNK(inode
->i_mode
)) {
538 inode
->i_op
= &page_symlink_inode_operations
;
539 inode_nohighmem(inode
);
540 inode
->i_mapping
->a_ops
= &hfsplus_aops
;
542 init_special_inode(inode
, inode
->i_mode
,
543 be32_to_cpu(file
->permissions
.dev
));
545 inode
->i_atime
= hfsp_mt2ut(file
->access_date
);
546 inode
->i_mtime
= hfsp_mt2ut(file
->content_mod_date
);
547 inode
->i_ctime
= hfsp_mt2ut(file
->attribute_mod_date
);
548 HFSPLUS_I(inode
)->create_date
= file
->create_date
;
550 pr_err("bad catalog entry used to create inode\n");
556 int hfsplus_cat_write_inode(struct inode
*inode
)
558 struct inode
*main_inode
= inode
;
559 struct hfs_find_data fd
;
560 hfsplus_cat_entry entry
;
562 if (HFSPLUS_IS_RSRC(inode
))
563 main_inode
= HFSPLUS_I(inode
)->rsrc_inode
;
565 if (!main_inode
->i_nlink
)
568 if (hfs_find_init(HFSPLUS_SB(main_inode
->i_sb
)->cat_tree
, &fd
))
572 if (hfsplus_find_cat(main_inode
->i_sb
, main_inode
->i_ino
, &fd
))
576 if (S_ISDIR(main_inode
->i_mode
)) {
577 struct hfsplus_cat_folder
*folder
= &entry
.folder
;
579 if (fd
.entrylength
< sizeof(struct hfsplus_cat_folder
))
581 hfs_bnode_read(fd
.bnode
, &entry
, fd
.entryoffset
,
582 sizeof(struct hfsplus_cat_folder
));
583 /* simple node checks? */
584 hfsplus_cat_set_perms(inode
, &folder
->permissions
);
585 folder
->access_date
= hfsp_ut2mt(inode
->i_atime
);
586 folder
->content_mod_date
= hfsp_ut2mt(inode
->i_mtime
);
587 folder
->attribute_mod_date
= hfsp_ut2mt(inode
->i_ctime
);
588 folder
->valence
= cpu_to_be32(inode
->i_size
- 2);
589 if (folder
->flags
& cpu_to_be16(HFSPLUS_HAS_FOLDER_COUNT
)) {
591 cpu_to_be32(HFSPLUS_I(inode
)->subfolders
);
593 hfs_bnode_write(fd
.bnode
, &entry
, fd
.entryoffset
,
594 sizeof(struct hfsplus_cat_folder
));
595 } else if (HFSPLUS_IS_RSRC(inode
)) {
596 struct hfsplus_cat_file
*file
= &entry
.file
;
597 hfs_bnode_read(fd
.bnode
, &entry
, fd
.entryoffset
,
598 sizeof(struct hfsplus_cat_file
));
599 hfsplus_inode_write_fork(inode
, &file
->rsrc_fork
);
600 hfs_bnode_write(fd
.bnode
, &entry
, fd
.entryoffset
,
601 sizeof(struct hfsplus_cat_file
));
603 struct hfsplus_cat_file
*file
= &entry
.file
;
605 if (fd
.entrylength
< sizeof(struct hfsplus_cat_file
))
607 hfs_bnode_read(fd
.bnode
, &entry
, fd
.entryoffset
,
608 sizeof(struct hfsplus_cat_file
));
609 hfsplus_inode_write_fork(inode
, &file
->data_fork
);
610 hfsplus_cat_set_perms(inode
, &file
->permissions
);
611 if (HFSPLUS_FLG_IMMUTABLE
&
612 (file
->permissions
.rootflags
|
613 file
->permissions
.userflags
))
614 file
->flags
|= cpu_to_be16(HFSPLUS_FILE_LOCKED
);
616 file
->flags
&= cpu_to_be16(~HFSPLUS_FILE_LOCKED
);
617 file
->access_date
= hfsp_ut2mt(inode
->i_atime
);
618 file
->content_mod_date
= hfsp_ut2mt(inode
->i_mtime
);
619 file
->attribute_mod_date
= hfsp_ut2mt(inode
->i_ctime
);
620 hfs_bnode_write(fd
.bnode
, &entry
, fd
.entryoffset
,
621 sizeof(struct hfsplus_cat_file
));
624 set_bit(HFSPLUS_I_CAT_DIRTY
, &HFSPLUS_I(inode
)->flags
);