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>
20 #include <linux/fileattr.h>
22 #include "hfsplus_fs.h"
23 #include "hfsplus_raw.h"
26 static int hfsplus_readpage(struct file *file, struct page *page)
28 return block_read_full_page(page, hfsplus_get_block);
31 static int hfsplus_writepage(struct page *page, struct writeback_control *wbc)
33 return block_write_full_page(page, hfsplus_get_block, wbc);
36 static void hfsplus_write_failed(struct address_space *mapping, loff_t to)
38 struct inode *inode = mapping->host;
40 if (to > inode->i_size) {
41 truncate_pagecache(inode, inode->i_size);
42 hfsplus_file_truncate(inode);
46 static int hfsplus_write_begin(struct file *file, struct address_space *mapping,
47 loff_t pos, unsigned len, unsigned flags,
48 struct page **pagep, void **fsdata)
53 ret = cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
55 &HFSPLUS_I(mapping->host)->phys_size);
57 hfsplus_write_failed(mapping, pos + len);
62 static sector_t hfsplus_bmap(struct address_space *mapping, sector_t block)
64 return generic_block_bmap(mapping, block, hfsplus_get_block);
67 static int hfsplus_releasepage(struct page *page, gfp_t mask)
69 struct inode *inode = page->mapping->host;
70 struct super_block *sb = inode->i_sb;
71 struct hfs_btree *tree;
72 struct hfs_bnode *node;
76 switch (inode->i_ino) {
77 case HFSPLUS_EXT_CNID:
78 tree = HFSPLUS_SB(sb)->ext_tree;
80 case HFSPLUS_CAT_CNID:
81 tree = HFSPLUS_SB(sb)->cat_tree;
83 case HFSPLUS_ATTR_CNID:
84 tree = HFSPLUS_SB(sb)->attr_tree;
92 if (tree->node_size >= PAGE_SIZE) {
94 (tree->node_size_shift - PAGE_SHIFT);
95 spin_lock(&tree->hash_lock);
96 node = hfs_bnode_findhash(tree, nidx);
99 else if (atomic_read(&node->refcnt))
102 hfs_bnode_unhash(node);
103 hfs_bnode_free(node);
105 spin_unlock(&tree->hash_lock);
107 nidx = page->index <<
108 (PAGE_SHIFT - tree->node_size_shift);
109 i = 1 << (PAGE_SHIFT - tree->node_size_shift);
110 spin_lock(&tree->hash_lock);
112 node = hfs_bnode_findhash(tree, nidx++);
115 if (atomic_read(&node->refcnt)) {
119 hfs_bnode_unhash(node);
120 hfs_bnode_free(node);
121 } while (--i && nidx < tree->node_count);
122 spin_unlock(&tree->hash_lock);
124 return res ? try_to_free_buffers(page) : 0;
127 static ssize_t hfsplus_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
129 struct file *file = iocb->ki_filp;
130 struct address_space *mapping = file->f_mapping;
131 struct inode *inode = mapping->host;
132 size_t count = iov_iter_count(iter);
135 ret = blockdev_direct_IO(iocb, inode, iter, hfsplus_get_block);
138 * In case of error extending write may have instantiated a few
139 * blocks outside i_size. Trim these off again.
141 if (unlikely(iov_iter_rw(iter) == WRITE && ret < 0)) {
142 loff_t isize = i_size_read(inode);
143 loff_t end = iocb->ki_pos + count;
146 hfsplus_write_failed(mapping, end);
152 static int hfsplus_writepages(struct address_space *mapping,
153 struct writeback_control *wbc)
155 return mpage_writepages(mapping, wbc, hfsplus_get_block);
158 const struct address_space_operations hfsplus_btree_aops = {
159 .readpage = hfsplus_readpage,
160 .writepage = hfsplus_writepage,
161 .write_begin = hfsplus_write_begin,
162 .write_end = generic_write_end,
163 .bmap = hfsplus_bmap,
164 .releasepage = hfsplus_releasepage,
167 const struct address_space_operations hfsplus_aops = {
168 .readpage = hfsplus_readpage,
169 .writepage = hfsplus_writepage,
170 .write_begin = hfsplus_write_begin,
171 .write_end = generic_write_end,
172 .bmap = hfsplus_bmap,
173 .direct_IO = hfsplus_direct_IO,
174 .writepages = hfsplus_writepages,
177 const struct dentry_operations hfsplus_dentry_operations = {
178 .d_hash = hfsplus_hash_dentry,
179 .d_compare = hfsplus_compare_dentry,
182 static void hfsplus_get_perms(struct inode *inode,
183 struct hfsplus_perm *perms, int dir)
185 struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb);
188 mode = be16_to_cpu(perms->mode);
190 i_uid_write(inode, be32_to_cpu(perms->owner));
191 if (!i_uid_read(inode) && !mode)
192 inode->i_uid = sbi->uid;
194 i_gid_write(inode, be32_to_cpu(perms->group));
195 if (!i_gid_read(inode) && !mode)
196 inode->i_gid = sbi->gid;
199 mode = mode ? (mode & S_IALLUGO) : (S_IRWXUGO & ~(sbi->umask));
202 mode = S_IFREG | ((S_IRUGO|S_IWUGO) & ~(sbi->umask));
203 inode->i_mode = mode;
205 HFSPLUS_I(inode)->userflags = perms->userflags;
206 if (perms->rootflags & HFSPLUS_FLG_IMMUTABLE)
207 inode->i_flags |= S_IMMUTABLE;
209 inode->i_flags &= ~S_IMMUTABLE;
210 if (perms->rootflags & HFSPLUS_FLG_APPEND)
211 inode->i_flags |= S_APPEND;
213 inode->i_flags &= ~S_APPEND;
216 static int hfsplus_file_open(struct inode *inode, struct file *file)
218 if (HFSPLUS_IS_RSRC(inode))
219 inode = HFSPLUS_I(inode)->rsrc_inode;
220 if (!(file->f_flags & O_LARGEFILE) && i_size_read(inode) > MAX_NON_LFS)
222 atomic_inc(&HFSPLUS_I(inode)->opencnt);
226 static int hfsplus_file_release(struct inode *inode, struct file *file)
228 struct super_block *sb = inode->i_sb;
230 if (HFSPLUS_IS_RSRC(inode))
231 inode = HFSPLUS_I(inode)->rsrc_inode;
232 if (atomic_dec_and_test(&HFSPLUS_I(inode)->opencnt)) {
234 hfsplus_file_truncate(inode);
235 if (inode->i_flags & S_DEAD) {
236 hfsplus_delete_cat(inode->i_ino,
237 HFSPLUS_SB(sb)->hidden_dir, NULL);
238 hfsplus_delete_inode(inode);
245 static int hfsplus_setattr(struct user_namespace *mnt_userns,
246 struct dentry *dentry, struct iattr *attr)
248 struct inode *inode = d_inode(dentry);
251 error = setattr_prepare(&init_user_ns, dentry, attr);
255 if ((attr->ia_valid & ATTR_SIZE) &&
256 attr->ia_size != i_size_read(inode)) {
257 inode_dio_wait(inode);
258 if (attr->ia_size > inode->i_size) {
259 error = generic_cont_expand_simple(inode,
264 truncate_setsize(inode, attr->ia_size);
265 hfsplus_file_truncate(inode);
266 inode->i_mtime = inode->i_ctime = current_time(inode);
269 setattr_copy(&init_user_ns, inode, attr);
270 mark_inode_dirty(inode);
275 int hfsplus_getattr(struct user_namespace *mnt_userns, const struct path *path,
276 struct kstat *stat, u32 request_mask,
277 unsigned int query_flags)
279 struct inode *inode = d_inode(path->dentry);
280 struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
282 if (inode->i_flags & S_APPEND)
283 stat->attributes |= STATX_ATTR_APPEND;
284 if (inode->i_flags & S_IMMUTABLE)
285 stat->attributes |= STATX_ATTR_IMMUTABLE;
286 if (hip->userflags & HFSPLUS_FLG_NODUMP)
287 stat->attributes |= STATX_ATTR_NODUMP;
289 stat->attributes_mask |= STATX_ATTR_APPEND | STATX_ATTR_IMMUTABLE |
292 generic_fillattr(&init_user_ns, inode, stat);
296 int hfsplus_file_fsync(struct file *file, loff_t start, loff_t end,
299 struct inode *inode = file->f_mapping->host;
300 struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
301 struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb);
302 int error = 0, error2;
304 error = file_write_and_wait_range(file, start, end);
310 * Sync inode metadata into the catalog and extent trees.
312 sync_inode_metadata(inode, 1);
315 * And explicitly write out the btrees.
317 if (test_and_clear_bit(HFSPLUS_I_CAT_DIRTY, &hip->flags))
318 error = filemap_write_and_wait(sbi->cat_tree->inode->i_mapping);
320 if (test_and_clear_bit(HFSPLUS_I_EXT_DIRTY, &hip->flags)) {
322 filemap_write_and_wait(sbi->ext_tree->inode->i_mapping);
327 if (test_and_clear_bit(HFSPLUS_I_ATTR_DIRTY, &hip->flags)) {
328 if (sbi->attr_tree) {
330 filemap_write_and_wait(
331 sbi->attr_tree->inode->i_mapping);
335 pr_err("sync non-existent attributes tree\n");
339 if (test_and_clear_bit(HFSPLUS_I_ALLOC_DIRTY, &hip->flags)) {
340 error2 = filemap_write_and_wait(sbi->alloc_file->i_mapping);
345 if (!test_bit(HFSPLUS_SB_NOBARRIER, &sbi->flags))
346 blkdev_issue_flush(inode->i_sb->s_bdev);
353 static const struct inode_operations hfsplus_file_inode_operations = {
354 .setattr = hfsplus_setattr,
355 .getattr = hfsplus_getattr,
356 .listxattr = hfsplus_listxattr,
357 .fileattr_get = hfsplus_fileattr_get,
358 .fileattr_set = hfsplus_fileattr_set,
361 static const struct file_operations hfsplus_file_operations = {
362 .llseek = generic_file_llseek,
363 .read_iter = generic_file_read_iter,
364 .write_iter = generic_file_write_iter,
365 .mmap = generic_file_mmap,
366 .splice_read = generic_file_splice_read,
367 .fsync = hfsplus_file_fsync,
368 .open = hfsplus_file_open,
369 .release = hfsplus_file_release,
370 .unlocked_ioctl = hfsplus_ioctl,
373 struct inode *hfsplus_new_inode(struct super_block *sb, struct inode *dir,
376 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
377 struct inode *inode = new_inode(sb);
378 struct hfsplus_inode_info *hip;
383 inode->i_ino = sbi->next_cnid++;
384 inode_init_owner(&init_user_ns, inode, dir, mode);
386 inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode);
388 hip = HFSPLUS_I(inode);
389 INIT_LIST_HEAD(&hip->open_dir_list);
390 spin_lock_init(&hip->open_dir_lock);
391 mutex_init(&hip->extents_lock);
392 atomic_set(&hip->opencnt, 0);
393 hip->extent_state = 0;
397 memset(hip->first_extents, 0, sizeof(hfsplus_extent_rec));
398 memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec));
399 hip->alloc_blocks = 0;
400 hip->first_blocks = 0;
401 hip->cached_start = 0;
402 hip->cached_blocks = 0;
405 hip->rsrc_inode = NULL;
406 if (S_ISDIR(inode->i_mode)) {
409 inode->i_op = &hfsplus_dir_inode_operations;
410 inode->i_fop = &hfsplus_dir_operations;
411 } else if (S_ISREG(inode->i_mode)) {
413 inode->i_op = &hfsplus_file_inode_operations;
414 inode->i_fop = &hfsplus_file_operations;
415 inode->i_mapping->a_ops = &hfsplus_aops;
416 hip->clump_blocks = sbi->data_clump_blocks;
417 } else if (S_ISLNK(inode->i_mode)) {
419 inode->i_op = &page_symlink_inode_operations;
420 inode_nohighmem(inode);
421 inode->i_mapping->a_ops = &hfsplus_aops;
422 hip->clump_blocks = 1;
425 insert_inode_hash(inode);
426 mark_inode_dirty(inode);
427 hfsplus_mark_mdb_dirty(sb);
432 void hfsplus_delete_inode(struct inode *inode)
434 struct super_block *sb = inode->i_sb;
436 if (S_ISDIR(inode->i_mode)) {
437 HFSPLUS_SB(sb)->folder_count--;
438 hfsplus_mark_mdb_dirty(sb);
441 HFSPLUS_SB(sb)->file_count--;
442 if (S_ISREG(inode->i_mode)) {
443 if (!inode->i_nlink) {
445 hfsplus_file_truncate(inode);
447 } else if (S_ISLNK(inode->i_mode)) {
449 hfsplus_file_truncate(inode);
451 hfsplus_mark_mdb_dirty(sb);
454 void hfsplus_inode_read_fork(struct inode *inode, struct hfsplus_fork_raw *fork)
456 struct super_block *sb = inode->i_sb;
457 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
458 struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
462 memcpy(&hip->first_extents, &fork->extents, sizeof(hfsplus_extent_rec));
463 for (count = 0, i = 0; i < 8; i++)
464 count += be32_to_cpu(fork->extents[i].block_count);
465 hip->first_blocks = count;
466 memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec));
467 hip->cached_start = 0;
468 hip->cached_blocks = 0;
470 hip->alloc_blocks = be32_to_cpu(fork->total_blocks);
471 hip->phys_size = inode->i_size = be64_to_cpu(fork->total_size);
473 (inode->i_size + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
474 inode_set_bytes(inode, hip->fs_blocks << sb->s_blocksize_bits);
476 be32_to_cpu(fork->clump_size) >> sbi->alloc_blksz_shift;
477 if (!hip->clump_blocks) {
478 hip->clump_blocks = HFSPLUS_IS_RSRC(inode) ?
479 sbi->rsrc_clump_blocks :
480 sbi->data_clump_blocks;
484 void hfsplus_inode_write_fork(struct inode *inode,
485 struct hfsplus_fork_raw *fork)
487 memcpy(&fork->extents, &HFSPLUS_I(inode)->first_extents,
488 sizeof(hfsplus_extent_rec));
489 fork->total_size = cpu_to_be64(inode->i_size);
490 fork->total_blocks = cpu_to_be32(HFSPLUS_I(inode)->alloc_blocks);
493 int hfsplus_cat_read_inode(struct inode *inode, struct hfs_find_data *fd)
495 hfsplus_cat_entry entry;
499 type = hfs_bnode_read_u16(fd->bnode, fd->entryoffset);
501 HFSPLUS_I(inode)->linkid = 0;
502 if (type == HFSPLUS_FOLDER) {
503 struct hfsplus_cat_folder *folder = &entry.folder;
505 if (fd->entrylength < sizeof(struct hfsplus_cat_folder))
507 hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
508 sizeof(struct hfsplus_cat_folder));
509 hfsplus_get_perms(inode, &folder->permissions, 1);
511 inode->i_size = 2 + be32_to_cpu(folder->valence);
512 inode->i_atime = hfsp_mt2ut(folder->access_date);
513 inode->i_mtime = hfsp_mt2ut(folder->content_mod_date);
514 inode->i_ctime = hfsp_mt2ut(folder->attribute_mod_date);
515 HFSPLUS_I(inode)->create_date = folder->create_date;
516 HFSPLUS_I(inode)->fs_blocks = 0;
517 if (folder->flags & cpu_to_be16(HFSPLUS_HAS_FOLDER_COUNT)) {
518 HFSPLUS_I(inode)->subfolders =
519 be32_to_cpu(folder->subfolders);
521 inode->i_op = &hfsplus_dir_inode_operations;
522 inode->i_fop = &hfsplus_dir_operations;
523 } else if (type == HFSPLUS_FILE) {
524 struct hfsplus_cat_file *file = &entry.file;
526 if (fd->entrylength < sizeof(struct hfsplus_cat_file))
528 hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
529 sizeof(struct hfsplus_cat_file));
531 hfsplus_inode_read_fork(inode, HFSPLUS_IS_RSRC(inode) ?
532 &file->rsrc_fork : &file->data_fork);
533 hfsplus_get_perms(inode, &file->permissions, 0);
535 if (S_ISREG(inode->i_mode)) {
536 if (file->permissions.dev)
538 be32_to_cpu(file->permissions.dev));
539 inode->i_op = &hfsplus_file_inode_operations;
540 inode->i_fop = &hfsplus_file_operations;
541 inode->i_mapping->a_ops = &hfsplus_aops;
542 } else if (S_ISLNK(inode->i_mode)) {
543 inode->i_op = &page_symlink_inode_operations;
544 inode_nohighmem(inode);
545 inode->i_mapping->a_ops = &hfsplus_aops;
547 init_special_inode(inode, inode->i_mode,
548 be32_to_cpu(file->permissions.dev));
550 inode->i_atime = hfsp_mt2ut(file->access_date);
551 inode->i_mtime = hfsp_mt2ut(file->content_mod_date);
552 inode->i_ctime = hfsp_mt2ut(file->attribute_mod_date);
553 HFSPLUS_I(inode)->create_date = file->create_date;
555 pr_err("bad catalog entry used to create inode\n");
561 int hfsplus_cat_write_inode(struct inode *inode)
563 struct inode *main_inode = inode;
564 struct hfs_find_data fd;
565 hfsplus_cat_entry entry;
567 if (HFSPLUS_IS_RSRC(inode))
568 main_inode = HFSPLUS_I(inode)->rsrc_inode;
570 if (!main_inode->i_nlink)
573 if (hfs_find_init(HFSPLUS_SB(main_inode->i_sb)->cat_tree, &fd))
577 if (hfsplus_find_cat(main_inode->i_sb, main_inode->i_ino, &fd))
581 if (S_ISDIR(main_inode->i_mode)) {
582 struct hfsplus_cat_folder *folder = &entry.folder;
584 if (fd.entrylength < sizeof(struct hfsplus_cat_folder))
586 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
587 sizeof(struct hfsplus_cat_folder));
588 /* simple node checks? */
589 hfsplus_cat_set_perms(inode, &folder->permissions);
590 folder->access_date = hfsp_ut2mt(inode->i_atime);
591 folder->content_mod_date = hfsp_ut2mt(inode->i_mtime);
592 folder->attribute_mod_date = hfsp_ut2mt(inode->i_ctime);
593 folder->valence = cpu_to_be32(inode->i_size - 2);
594 if (folder->flags & cpu_to_be16(HFSPLUS_HAS_FOLDER_COUNT)) {
596 cpu_to_be32(HFSPLUS_I(inode)->subfolders);
598 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
599 sizeof(struct hfsplus_cat_folder));
600 } else if (HFSPLUS_IS_RSRC(inode)) {
601 struct hfsplus_cat_file *file = &entry.file;
602 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
603 sizeof(struct hfsplus_cat_file));
604 hfsplus_inode_write_fork(inode, &file->rsrc_fork);
605 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
606 sizeof(struct hfsplus_cat_file));
608 struct hfsplus_cat_file *file = &entry.file;
610 if (fd.entrylength < sizeof(struct hfsplus_cat_file))
612 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
613 sizeof(struct hfsplus_cat_file));
614 hfsplus_inode_write_fork(inode, &file->data_fork);
615 hfsplus_cat_set_perms(inode, &file->permissions);
616 if (HFSPLUS_FLG_IMMUTABLE &
617 (file->permissions.rootflags |
618 file->permissions.userflags))
619 file->flags |= cpu_to_be16(HFSPLUS_FILE_LOCKED);
621 file->flags &= cpu_to_be16(~HFSPLUS_FILE_LOCKED);
622 file->access_date = hfsp_ut2mt(inode->i_atime);
623 file->content_mod_date = hfsp_ut2mt(inode->i_mtime);
624 file->attribute_mod_date = hfsp_ut2mt(inode->i_ctime);
625 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
626 sizeof(struct hfsplus_cat_file));
629 set_bit(HFSPLUS_I_CAT_DIRTY, &HFSPLUS_I(inode)->flags);
635 int hfsplus_fileattr_get(struct dentry *dentry, struct fileattr *fa)
637 struct inode *inode = d_inode(dentry);
638 struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
639 unsigned int flags = 0;
641 if (inode->i_flags & S_IMMUTABLE)
642 flags |= FS_IMMUTABLE_FL;
643 if (inode->i_flags & S_APPEND)
644 flags |= FS_APPEND_FL;
645 if (hip->userflags & HFSPLUS_FLG_NODUMP)
646 flags |= FS_NODUMP_FL;
648 fileattr_fill_flags(fa, flags);
653 int hfsplus_fileattr_set(struct user_namespace *mnt_userns,
654 struct dentry *dentry, struct fileattr *fa)
656 struct inode *inode = d_inode(dentry);
657 struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
658 unsigned int new_fl = 0;
660 if (fileattr_has_fsx(fa))
663 /* don't silently ignore unsupported ext2 flags */
664 if (fa->flags & ~(FS_IMMUTABLE_FL|FS_APPEND_FL|FS_NODUMP_FL))
667 if (fa->flags & FS_IMMUTABLE_FL)
668 new_fl |= S_IMMUTABLE;
670 if (fa->flags & FS_APPEND_FL)
673 inode_set_flags(inode, new_fl, S_IMMUTABLE | S_APPEND);
675 if (fa->flags & FS_NODUMP_FL)
676 hip->userflags |= HFSPLUS_FLG_NODUMP;
678 hip->userflags &= ~HFSPLUS_FLG_NODUMP;
680 inode->i_ctime = current_time(inode);
681 mark_inode_dirty(inode);