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 user_namespace
*mnt_userns
,
245 struct dentry
*dentry
, struct iattr
*attr
)
247 struct inode
*inode
= d_inode(dentry
);
250 error
= setattr_prepare(&init_user_ns
, dentry
, attr
);
254 if ((attr
->ia_valid
& ATTR_SIZE
) &&
255 attr
->ia_size
!= i_size_read(inode
)) {
256 inode_dio_wait(inode
);
257 if (attr
->ia_size
> inode
->i_size
) {
258 error
= generic_cont_expand_simple(inode
,
263 truncate_setsize(inode
, attr
->ia_size
);
264 hfsplus_file_truncate(inode
);
265 inode
->i_mtime
= inode
->i_ctime
= current_time(inode
);
268 setattr_copy(&init_user_ns
, inode
, attr
);
269 mark_inode_dirty(inode
);
274 int hfsplus_getattr(struct user_namespace
*mnt_userns
, const struct path
*path
,
275 struct kstat
*stat
, u32 request_mask
,
276 unsigned int query_flags
)
278 struct inode
*inode
= d_inode(path
->dentry
);
279 struct hfsplus_inode_info
*hip
= HFSPLUS_I(inode
);
281 if (inode
->i_flags
& S_APPEND
)
282 stat
->attributes
|= STATX_ATTR_APPEND
;
283 if (inode
->i_flags
& S_IMMUTABLE
)
284 stat
->attributes
|= STATX_ATTR_IMMUTABLE
;
285 if (hip
->userflags
& HFSPLUS_FLG_NODUMP
)
286 stat
->attributes
|= STATX_ATTR_NODUMP
;
288 stat
->attributes_mask
|= STATX_ATTR_APPEND
| STATX_ATTR_IMMUTABLE
|
291 generic_fillattr(&init_user_ns
, inode
, stat
);
295 int hfsplus_file_fsync(struct file
*file
, loff_t start
, loff_t end
,
298 struct inode
*inode
= file
->f_mapping
->host
;
299 struct hfsplus_inode_info
*hip
= HFSPLUS_I(inode
);
300 struct hfsplus_sb_info
*sbi
= HFSPLUS_SB(inode
->i_sb
);
301 int error
= 0, error2
;
303 error
= file_write_and_wait_range(file
, start
, end
);
309 * Sync inode metadata into the catalog and extent trees.
311 sync_inode_metadata(inode
, 1);
314 * And explicitly write out the btrees.
316 if (test_and_clear_bit(HFSPLUS_I_CAT_DIRTY
, &hip
->flags
))
317 error
= filemap_write_and_wait(sbi
->cat_tree
->inode
->i_mapping
);
319 if (test_and_clear_bit(HFSPLUS_I_EXT_DIRTY
, &hip
->flags
)) {
321 filemap_write_and_wait(sbi
->ext_tree
->inode
->i_mapping
);
326 if (test_and_clear_bit(HFSPLUS_I_ATTR_DIRTY
, &hip
->flags
)) {
327 if (sbi
->attr_tree
) {
329 filemap_write_and_wait(
330 sbi
->attr_tree
->inode
->i_mapping
);
334 pr_err("sync non-existent attributes tree\n");
338 if (test_and_clear_bit(HFSPLUS_I_ALLOC_DIRTY
, &hip
->flags
)) {
339 error2
= filemap_write_and_wait(sbi
->alloc_file
->i_mapping
);
344 if (!test_bit(HFSPLUS_SB_NOBARRIER
, &sbi
->flags
))
345 blkdev_issue_flush(inode
->i_sb
->s_bdev
, GFP_KERNEL
);
352 static const struct inode_operations hfsplus_file_inode_operations
= {
353 .setattr
= hfsplus_setattr
,
354 .getattr
= hfsplus_getattr
,
355 .listxattr
= hfsplus_listxattr
,
358 static const struct file_operations hfsplus_file_operations
= {
359 .llseek
= generic_file_llseek
,
360 .read_iter
= generic_file_read_iter
,
361 .write_iter
= generic_file_write_iter
,
362 .mmap
= generic_file_mmap
,
363 .splice_read
= generic_file_splice_read
,
364 .fsync
= hfsplus_file_fsync
,
365 .open
= hfsplus_file_open
,
366 .release
= hfsplus_file_release
,
367 .unlocked_ioctl
= hfsplus_ioctl
,
370 struct inode
*hfsplus_new_inode(struct super_block
*sb
, struct inode
*dir
,
373 struct hfsplus_sb_info
*sbi
= HFSPLUS_SB(sb
);
374 struct inode
*inode
= new_inode(sb
);
375 struct hfsplus_inode_info
*hip
;
380 inode
->i_ino
= sbi
->next_cnid
++;
381 inode_init_owner(&init_user_ns
, inode
, dir
, mode
);
383 inode
->i_mtime
= inode
->i_atime
= inode
->i_ctime
= current_time(inode
);
385 hip
= HFSPLUS_I(inode
);
386 INIT_LIST_HEAD(&hip
->open_dir_list
);
387 spin_lock_init(&hip
->open_dir_lock
);
388 mutex_init(&hip
->extents_lock
);
389 atomic_set(&hip
->opencnt
, 0);
390 hip
->extent_state
= 0;
394 memset(hip
->first_extents
, 0, sizeof(hfsplus_extent_rec
));
395 memset(hip
->cached_extents
, 0, sizeof(hfsplus_extent_rec
));
396 hip
->alloc_blocks
= 0;
397 hip
->first_blocks
= 0;
398 hip
->cached_start
= 0;
399 hip
->cached_blocks
= 0;
402 hip
->rsrc_inode
= NULL
;
403 if (S_ISDIR(inode
->i_mode
)) {
406 inode
->i_op
= &hfsplus_dir_inode_operations
;
407 inode
->i_fop
= &hfsplus_dir_operations
;
408 } else if (S_ISREG(inode
->i_mode
)) {
410 inode
->i_op
= &hfsplus_file_inode_operations
;
411 inode
->i_fop
= &hfsplus_file_operations
;
412 inode
->i_mapping
->a_ops
= &hfsplus_aops
;
413 hip
->clump_blocks
= sbi
->data_clump_blocks
;
414 } else if (S_ISLNK(inode
->i_mode
)) {
416 inode
->i_op
= &page_symlink_inode_operations
;
417 inode_nohighmem(inode
);
418 inode
->i_mapping
->a_ops
= &hfsplus_aops
;
419 hip
->clump_blocks
= 1;
422 insert_inode_hash(inode
);
423 mark_inode_dirty(inode
);
424 hfsplus_mark_mdb_dirty(sb
);
429 void hfsplus_delete_inode(struct inode
*inode
)
431 struct super_block
*sb
= inode
->i_sb
;
433 if (S_ISDIR(inode
->i_mode
)) {
434 HFSPLUS_SB(sb
)->folder_count
--;
435 hfsplus_mark_mdb_dirty(sb
);
438 HFSPLUS_SB(sb
)->file_count
--;
439 if (S_ISREG(inode
->i_mode
)) {
440 if (!inode
->i_nlink
) {
442 hfsplus_file_truncate(inode
);
444 } else if (S_ISLNK(inode
->i_mode
)) {
446 hfsplus_file_truncate(inode
);
448 hfsplus_mark_mdb_dirty(sb
);
451 void hfsplus_inode_read_fork(struct inode
*inode
, struct hfsplus_fork_raw
*fork
)
453 struct super_block
*sb
= inode
->i_sb
;
454 struct hfsplus_sb_info
*sbi
= HFSPLUS_SB(sb
);
455 struct hfsplus_inode_info
*hip
= HFSPLUS_I(inode
);
459 memcpy(&hip
->first_extents
, &fork
->extents
, sizeof(hfsplus_extent_rec
));
460 for (count
= 0, i
= 0; i
< 8; i
++)
461 count
+= be32_to_cpu(fork
->extents
[i
].block_count
);
462 hip
->first_blocks
= count
;
463 memset(hip
->cached_extents
, 0, sizeof(hfsplus_extent_rec
));
464 hip
->cached_start
= 0;
465 hip
->cached_blocks
= 0;
467 hip
->alloc_blocks
= be32_to_cpu(fork
->total_blocks
);
468 hip
->phys_size
= inode
->i_size
= be64_to_cpu(fork
->total_size
);
470 (inode
->i_size
+ sb
->s_blocksize
- 1) >> sb
->s_blocksize_bits
;
471 inode_set_bytes(inode
, hip
->fs_blocks
<< sb
->s_blocksize_bits
);
473 be32_to_cpu(fork
->clump_size
) >> sbi
->alloc_blksz_shift
;
474 if (!hip
->clump_blocks
) {
475 hip
->clump_blocks
= HFSPLUS_IS_RSRC(inode
) ?
476 sbi
->rsrc_clump_blocks
:
477 sbi
->data_clump_blocks
;
481 void hfsplus_inode_write_fork(struct inode
*inode
,
482 struct hfsplus_fork_raw
*fork
)
484 memcpy(&fork
->extents
, &HFSPLUS_I(inode
)->first_extents
,
485 sizeof(hfsplus_extent_rec
));
486 fork
->total_size
= cpu_to_be64(inode
->i_size
);
487 fork
->total_blocks
= cpu_to_be32(HFSPLUS_I(inode
)->alloc_blocks
);
490 int hfsplus_cat_read_inode(struct inode
*inode
, struct hfs_find_data
*fd
)
492 hfsplus_cat_entry entry
;
496 type
= hfs_bnode_read_u16(fd
->bnode
, fd
->entryoffset
);
498 HFSPLUS_I(inode
)->linkid
= 0;
499 if (type
== HFSPLUS_FOLDER
) {
500 struct hfsplus_cat_folder
*folder
= &entry
.folder
;
502 if (fd
->entrylength
< sizeof(struct hfsplus_cat_folder
))
504 hfs_bnode_read(fd
->bnode
, &entry
, fd
->entryoffset
,
505 sizeof(struct hfsplus_cat_folder
));
506 hfsplus_get_perms(inode
, &folder
->permissions
, 1);
508 inode
->i_size
= 2 + be32_to_cpu(folder
->valence
);
509 inode
->i_atime
= hfsp_mt2ut(folder
->access_date
);
510 inode
->i_mtime
= hfsp_mt2ut(folder
->content_mod_date
);
511 inode
->i_ctime
= hfsp_mt2ut(folder
->attribute_mod_date
);
512 HFSPLUS_I(inode
)->create_date
= folder
->create_date
;
513 HFSPLUS_I(inode
)->fs_blocks
= 0;
514 if (folder
->flags
& cpu_to_be16(HFSPLUS_HAS_FOLDER_COUNT
)) {
515 HFSPLUS_I(inode
)->subfolders
=
516 be32_to_cpu(folder
->subfolders
);
518 inode
->i_op
= &hfsplus_dir_inode_operations
;
519 inode
->i_fop
= &hfsplus_dir_operations
;
520 } else if (type
== HFSPLUS_FILE
) {
521 struct hfsplus_cat_file
*file
= &entry
.file
;
523 if (fd
->entrylength
< sizeof(struct hfsplus_cat_file
))
525 hfs_bnode_read(fd
->bnode
, &entry
, fd
->entryoffset
,
526 sizeof(struct hfsplus_cat_file
));
528 hfsplus_inode_read_fork(inode
, HFSPLUS_IS_RSRC(inode
) ?
529 &file
->rsrc_fork
: &file
->data_fork
);
530 hfsplus_get_perms(inode
, &file
->permissions
, 0);
532 if (S_ISREG(inode
->i_mode
)) {
533 if (file
->permissions
.dev
)
535 be32_to_cpu(file
->permissions
.dev
));
536 inode
->i_op
= &hfsplus_file_inode_operations
;
537 inode
->i_fop
= &hfsplus_file_operations
;
538 inode
->i_mapping
->a_ops
= &hfsplus_aops
;
539 } else if (S_ISLNK(inode
->i_mode
)) {
540 inode
->i_op
= &page_symlink_inode_operations
;
541 inode_nohighmem(inode
);
542 inode
->i_mapping
->a_ops
= &hfsplus_aops
;
544 init_special_inode(inode
, inode
->i_mode
,
545 be32_to_cpu(file
->permissions
.dev
));
547 inode
->i_atime
= hfsp_mt2ut(file
->access_date
);
548 inode
->i_mtime
= hfsp_mt2ut(file
->content_mod_date
);
549 inode
->i_ctime
= hfsp_mt2ut(file
->attribute_mod_date
);
550 HFSPLUS_I(inode
)->create_date
= file
->create_date
;
552 pr_err("bad catalog entry used to create inode\n");
558 int hfsplus_cat_write_inode(struct inode
*inode
)
560 struct inode
*main_inode
= inode
;
561 struct hfs_find_data fd
;
562 hfsplus_cat_entry entry
;
564 if (HFSPLUS_IS_RSRC(inode
))
565 main_inode
= HFSPLUS_I(inode
)->rsrc_inode
;
567 if (!main_inode
->i_nlink
)
570 if (hfs_find_init(HFSPLUS_SB(main_inode
->i_sb
)->cat_tree
, &fd
))
574 if (hfsplus_find_cat(main_inode
->i_sb
, main_inode
->i_ino
, &fd
))
578 if (S_ISDIR(main_inode
->i_mode
)) {
579 struct hfsplus_cat_folder
*folder
= &entry
.folder
;
581 if (fd
.entrylength
< sizeof(struct hfsplus_cat_folder
))
583 hfs_bnode_read(fd
.bnode
, &entry
, fd
.entryoffset
,
584 sizeof(struct hfsplus_cat_folder
));
585 /* simple node checks? */
586 hfsplus_cat_set_perms(inode
, &folder
->permissions
);
587 folder
->access_date
= hfsp_ut2mt(inode
->i_atime
);
588 folder
->content_mod_date
= hfsp_ut2mt(inode
->i_mtime
);
589 folder
->attribute_mod_date
= hfsp_ut2mt(inode
->i_ctime
);
590 folder
->valence
= cpu_to_be32(inode
->i_size
- 2);
591 if (folder
->flags
& cpu_to_be16(HFSPLUS_HAS_FOLDER_COUNT
)) {
593 cpu_to_be32(HFSPLUS_I(inode
)->subfolders
);
595 hfs_bnode_write(fd
.bnode
, &entry
, fd
.entryoffset
,
596 sizeof(struct hfsplus_cat_folder
));
597 } else if (HFSPLUS_IS_RSRC(inode
)) {
598 struct hfsplus_cat_file
*file
= &entry
.file
;
599 hfs_bnode_read(fd
.bnode
, &entry
, fd
.entryoffset
,
600 sizeof(struct hfsplus_cat_file
));
601 hfsplus_inode_write_fork(inode
, &file
->rsrc_fork
);
602 hfs_bnode_write(fd
.bnode
, &entry
, fd
.entryoffset
,
603 sizeof(struct hfsplus_cat_file
));
605 struct hfsplus_cat_file
*file
= &entry
.file
;
607 if (fd
.entrylength
< sizeof(struct hfsplus_cat_file
))
609 hfs_bnode_read(fd
.bnode
, &entry
, fd
.entryoffset
,
610 sizeof(struct hfsplus_cat_file
));
611 hfsplus_inode_write_fork(inode
, &file
->data_fork
);
612 hfsplus_cat_set_perms(inode
, &file
->permissions
);
613 if (HFSPLUS_FLG_IMMUTABLE
&
614 (file
->permissions
.rootflags
|
615 file
->permissions
.userflags
))
616 file
->flags
|= cpu_to_be16(HFSPLUS_FILE_LOCKED
);
618 file
->flags
&= cpu_to_be16(~HFSPLUS_FILE_LOCKED
);
619 file
->access_date
= hfsp_ut2mt(inode
->i_atime
);
620 file
->content_mod_date
= hfsp_ut2mt(inode
->i_mtime
);
621 file
->attribute_mod_date
= hfsp_ut2mt(inode
->i_ctime
);
622 hfs_bnode_write(fd
.bnode
, &entry
, fd
.entryoffset
,
623 sizeof(struct hfsplus_cat_file
));
626 set_bit(HFSPLUS_I_CAT_DIRTY
, &HFSPLUS_I(inode
)->flags
);