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 .set_page_dirty = __set_page_dirty_buffers,
160 .readpage = hfsplus_readpage,
161 .writepage = hfsplus_writepage,
162 .write_begin = hfsplus_write_begin,
163 .write_end = generic_write_end,
164 .bmap = hfsplus_bmap,
165 .releasepage = hfsplus_releasepage,
168 const struct address_space_operations hfsplus_aops = {
169 .set_page_dirty = __set_page_dirty_buffers,
170 .readpage = hfsplus_readpage,
171 .writepage = hfsplus_writepage,
172 .write_begin = hfsplus_write_begin,
173 .write_end = generic_write_end,
174 .bmap = hfsplus_bmap,
175 .direct_IO = hfsplus_direct_IO,
176 .writepages = hfsplus_writepages,
179 const struct dentry_operations hfsplus_dentry_operations = {
180 .d_hash = hfsplus_hash_dentry,
181 .d_compare = hfsplus_compare_dentry,
184 static void hfsplus_get_perms(struct inode *inode,
185 struct hfsplus_perm *perms, int dir)
187 struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb);
190 mode = be16_to_cpu(perms->mode);
192 i_uid_write(inode, be32_to_cpu(perms->owner));
193 if (!i_uid_read(inode) && !mode)
194 inode->i_uid = sbi->uid;
196 i_gid_write(inode, be32_to_cpu(perms->group));
197 if (!i_gid_read(inode) && !mode)
198 inode->i_gid = sbi->gid;
201 mode = mode ? (mode & S_IALLUGO) : (S_IRWXUGO & ~(sbi->umask));
204 mode = S_IFREG | ((S_IRUGO|S_IWUGO) & ~(sbi->umask));
205 inode->i_mode = mode;
207 HFSPLUS_I(inode)->userflags = perms->userflags;
208 if (perms->rootflags & HFSPLUS_FLG_IMMUTABLE)
209 inode->i_flags |= S_IMMUTABLE;
211 inode->i_flags &= ~S_IMMUTABLE;
212 if (perms->rootflags & HFSPLUS_FLG_APPEND)
213 inode->i_flags |= S_APPEND;
215 inode->i_flags &= ~S_APPEND;
218 static int hfsplus_file_open(struct inode *inode, struct file *file)
220 if (HFSPLUS_IS_RSRC(inode))
221 inode = HFSPLUS_I(inode)->rsrc_inode;
222 if (!(file->f_flags & O_LARGEFILE) && i_size_read(inode) > MAX_NON_LFS)
224 atomic_inc(&HFSPLUS_I(inode)->opencnt);
228 static int hfsplus_file_release(struct inode *inode, struct file *file)
230 struct super_block *sb = inode->i_sb;
232 if (HFSPLUS_IS_RSRC(inode))
233 inode = HFSPLUS_I(inode)->rsrc_inode;
234 if (atomic_dec_and_test(&HFSPLUS_I(inode)->opencnt)) {
236 hfsplus_file_truncate(inode);
237 if (inode->i_flags & S_DEAD) {
238 hfsplus_delete_cat(inode->i_ino,
239 HFSPLUS_SB(sb)->hidden_dir, NULL);
240 hfsplus_delete_inode(inode);
247 static int hfsplus_setattr(struct user_namespace *mnt_userns,
248 struct dentry *dentry, struct iattr *attr)
250 struct inode *inode = d_inode(dentry);
253 error = setattr_prepare(&init_user_ns, dentry, attr);
257 if ((attr->ia_valid & ATTR_SIZE) &&
258 attr->ia_size != i_size_read(inode)) {
259 inode_dio_wait(inode);
260 if (attr->ia_size > inode->i_size) {
261 error = generic_cont_expand_simple(inode,
266 truncate_setsize(inode, attr->ia_size);
267 hfsplus_file_truncate(inode);
268 inode->i_mtime = inode->i_ctime = current_time(inode);
271 setattr_copy(&init_user_ns, inode, attr);
272 mark_inode_dirty(inode);
277 int hfsplus_getattr(struct user_namespace *mnt_userns, const struct path *path,
278 struct kstat *stat, u32 request_mask,
279 unsigned int query_flags)
281 struct inode *inode = d_inode(path->dentry);
282 struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
284 if (inode->i_flags & S_APPEND)
285 stat->attributes |= STATX_ATTR_APPEND;
286 if (inode->i_flags & S_IMMUTABLE)
287 stat->attributes |= STATX_ATTR_IMMUTABLE;
288 if (hip->userflags & HFSPLUS_FLG_NODUMP)
289 stat->attributes |= STATX_ATTR_NODUMP;
291 stat->attributes_mask |= STATX_ATTR_APPEND | STATX_ATTR_IMMUTABLE |
294 generic_fillattr(&init_user_ns, inode, stat);
298 int hfsplus_file_fsync(struct file *file, loff_t start, loff_t end,
301 struct inode *inode = file->f_mapping->host;
302 struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
303 struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb);
304 int error = 0, error2;
306 error = file_write_and_wait_range(file, start, end);
312 * Sync inode metadata into the catalog and extent trees.
314 sync_inode_metadata(inode, 1);
317 * And explicitly write out the btrees.
319 if (test_and_clear_bit(HFSPLUS_I_CAT_DIRTY, &hip->flags))
320 error = filemap_write_and_wait(sbi->cat_tree->inode->i_mapping);
322 if (test_and_clear_bit(HFSPLUS_I_EXT_DIRTY, &hip->flags)) {
324 filemap_write_and_wait(sbi->ext_tree->inode->i_mapping);
329 if (test_and_clear_bit(HFSPLUS_I_ATTR_DIRTY, &hip->flags)) {
330 if (sbi->attr_tree) {
332 filemap_write_and_wait(
333 sbi->attr_tree->inode->i_mapping);
337 pr_err("sync non-existent attributes tree\n");
341 if (test_and_clear_bit(HFSPLUS_I_ALLOC_DIRTY, &hip->flags)) {
342 error2 = filemap_write_and_wait(sbi->alloc_file->i_mapping);
347 if (!test_bit(HFSPLUS_SB_NOBARRIER, &sbi->flags))
348 blkdev_issue_flush(inode->i_sb->s_bdev);
355 static const struct inode_operations hfsplus_file_inode_operations = {
356 .setattr = hfsplus_setattr,
357 .getattr = hfsplus_getattr,
358 .listxattr = hfsplus_listxattr,
359 .fileattr_get = hfsplus_fileattr_get,
360 .fileattr_set = hfsplus_fileattr_set,
363 static const struct file_operations hfsplus_file_operations = {
364 .llseek = generic_file_llseek,
365 .read_iter = generic_file_read_iter,
366 .write_iter = generic_file_write_iter,
367 .mmap = generic_file_mmap,
368 .splice_read = generic_file_splice_read,
369 .fsync = hfsplus_file_fsync,
370 .open = hfsplus_file_open,
371 .release = hfsplus_file_release,
372 .unlocked_ioctl = hfsplus_ioctl,
375 struct inode *hfsplus_new_inode(struct super_block *sb, struct inode *dir,
378 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
379 struct inode *inode = new_inode(sb);
380 struct hfsplus_inode_info *hip;
385 inode->i_ino = sbi->next_cnid++;
386 inode_init_owner(&init_user_ns, inode, dir, mode);
388 inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode);
390 hip = HFSPLUS_I(inode);
391 INIT_LIST_HEAD(&hip->open_dir_list);
392 spin_lock_init(&hip->open_dir_lock);
393 mutex_init(&hip->extents_lock);
394 atomic_set(&hip->opencnt, 0);
395 hip->extent_state = 0;
399 memset(hip->first_extents, 0, sizeof(hfsplus_extent_rec));
400 memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec));
401 hip->alloc_blocks = 0;
402 hip->first_blocks = 0;
403 hip->cached_start = 0;
404 hip->cached_blocks = 0;
407 hip->rsrc_inode = NULL;
408 if (S_ISDIR(inode->i_mode)) {
411 inode->i_op = &hfsplus_dir_inode_operations;
412 inode->i_fop = &hfsplus_dir_operations;
413 } else if (S_ISREG(inode->i_mode)) {
415 inode->i_op = &hfsplus_file_inode_operations;
416 inode->i_fop = &hfsplus_file_operations;
417 inode->i_mapping->a_ops = &hfsplus_aops;
418 hip->clump_blocks = sbi->data_clump_blocks;
419 } else if (S_ISLNK(inode->i_mode)) {
421 inode->i_op = &page_symlink_inode_operations;
422 inode_nohighmem(inode);
423 inode->i_mapping->a_ops = &hfsplus_aops;
424 hip->clump_blocks = 1;
427 insert_inode_hash(inode);
428 mark_inode_dirty(inode);
429 hfsplus_mark_mdb_dirty(sb);
434 void hfsplus_delete_inode(struct inode *inode)
436 struct super_block *sb = inode->i_sb;
438 if (S_ISDIR(inode->i_mode)) {
439 HFSPLUS_SB(sb)->folder_count--;
440 hfsplus_mark_mdb_dirty(sb);
443 HFSPLUS_SB(sb)->file_count--;
444 if (S_ISREG(inode->i_mode)) {
445 if (!inode->i_nlink) {
447 hfsplus_file_truncate(inode);
449 } else if (S_ISLNK(inode->i_mode)) {
451 hfsplus_file_truncate(inode);
453 hfsplus_mark_mdb_dirty(sb);
456 void hfsplus_inode_read_fork(struct inode *inode, struct hfsplus_fork_raw *fork)
458 struct super_block *sb = inode->i_sb;
459 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
460 struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
464 memcpy(&hip->first_extents, &fork->extents, sizeof(hfsplus_extent_rec));
465 for (count = 0, i = 0; i < 8; i++)
466 count += be32_to_cpu(fork->extents[i].block_count);
467 hip->first_blocks = count;
468 memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec));
469 hip->cached_start = 0;
470 hip->cached_blocks = 0;
472 hip->alloc_blocks = be32_to_cpu(fork->total_blocks);
473 hip->phys_size = inode->i_size = be64_to_cpu(fork->total_size);
475 (inode->i_size + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
476 inode_set_bytes(inode, hip->fs_blocks << sb->s_blocksize_bits);
478 be32_to_cpu(fork->clump_size) >> sbi->alloc_blksz_shift;
479 if (!hip->clump_blocks) {
480 hip->clump_blocks = HFSPLUS_IS_RSRC(inode) ?
481 sbi->rsrc_clump_blocks :
482 sbi->data_clump_blocks;
486 void hfsplus_inode_write_fork(struct inode *inode,
487 struct hfsplus_fork_raw *fork)
489 memcpy(&fork->extents, &HFSPLUS_I(inode)->first_extents,
490 sizeof(hfsplus_extent_rec));
491 fork->total_size = cpu_to_be64(inode->i_size);
492 fork->total_blocks = cpu_to_be32(HFSPLUS_I(inode)->alloc_blocks);
495 int hfsplus_cat_read_inode(struct inode *inode, struct hfs_find_data *fd)
497 hfsplus_cat_entry entry;
501 type = hfs_bnode_read_u16(fd->bnode, fd->entryoffset);
503 HFSPLUS_I(inode)->linkid = 0;
504 if (type == HFSPLUS_FOLDER) {
505 struct hfsplus_cat_folder *folder = &entry.folder;
507 if (fd->entrylength < sizeof(struct hfsplus_cat_folder))
509 hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
510 sizeof(struct hfsplus_cat_folder));
511 hfsplus_get_perms(inode, &folder->permissions, 1);
513 inode->i_size = 2 + be32_to_cpu(folder->valence);
514 inode->i_atime = hfsp_mt2ut(folder->access_date);
515 inode->i_mtime = hfsp_mt2ut(folder->content_mod_date);
516 inode->i_ctime = hfsp_mt2ut(folder->attribute_mod_date);
517 HFSPLUS_I(inode)->create_date = folder->create_date;
518 HFSPLUS_I(inode)->fs_blocks = 0;
519 if (folder->flags & cpu_to_be16(HFSPLUS_HAS_FOLDER_COUNT)) {
520 HFSPLUS_I(inode)->subfolders =
521 be32_to_cpu(folder->subfolders);
523 inode->i_op = &hfsplus_dir_inode_operations;
524 inode->i_fop = &hfsplus_dir_operations;
525 } else if (type == HFSPLUS_FILE) {
526 struct hfsplus_cat_file *file = &entry.file;
528 if (fd->entrylength < sizeof(struct hfsplus_cat_file))
530 hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
531 sizeof(struct hfsplus_cat_file));
533 hfsplus_inode_read_fork(inode, HFSPLUS_IS_RSRC(inode) ?
534 &file->rsrc_fork : &file->data_fork);
535 hfsplus_get_perms(inode, &file->permissions, 0);
537 if (S_ISREG(inode->i_mode)) {
538 if (file->permissions.dev)
540 be32_to_cpu(file->permissions.dev));
541 inode->i_op = &hfsplus_file_inode_operations;
542 inode->i_fop = &hfsplus_file_operations;
543 inode->i_mapping->a_ops = &hfsplus_aops;
544 } else if (S_ISLNK(inode->i_mode)) {
545 inode->i_op = &page_symlink_inode_operations;
546 inode_nohighmem(inode);
547 inode->i_mapping->a_ops = &hfsplus_aops;
549 init_special_inode(inode, inode->i_mode,
550 be32_to_cpu(file->permissions.dev));
552 inode->i_atime = hfsp_mt2ut(file->access_date);
553 inode->i_mtime = hfsp_mt2ut(file->content_mod_date);
554 inode->i_ctime = hfsp_mt2ut(file->attribute_mod_date);
555 HFSPLUS_I(inode)->create_date = file->create_date;
557 pr_err("bad catalog entry used to create inode\n");
563 int hfsplus_cat_write_inode(struct inode *inode)
565 struct inode *main_inode = inode;
566 struct hfs_find_data fd;
567 hfsplus_cat_entry entry;
569 if (HFSPLUS_IS_RSRC(inode))
570 main_inode = HFSPLUS_I(inode)->rsrc_inode;
572 if (!main_inode->i_nlink)
575 if (hfs_find_init(HFSPLUS_SB(main_inode->i_sb)->cat_tree, &fd))
579 if (hfsplus_find_cat(main_inode->i_sb, main_inode->i_ino, &fd))
583 if (S_ISDIR(main_inode->i_mode)) {
584 struct hfsplus_cat_folder *folder = &entry.folder;
586 if (fd.entrylength < sizeof(struct hfsplus_cat_folder))
588 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
589 sizeof(struct hfsplus_cat_folder));
590 /* simple node checks? */
591 hfsplus_cat_set_perms(inode, &folder->permissions);
592 folder->access_date = hfsp_ut2mt(inode->i_atime);
593 folder->content_mod_date = hfsp_ut2mt(inode->i_mtime);
594 folder->attribute_mod_date = hfsp_ut2mt(inode->i_ctime);
595 folder->valence = cpu_to_be32(inode->i_size - 2);
596 if (folder->flags & cpu_to_be16(HFSPLUS_HAS_FOLDER_COUNT)) {
598 cpu_to_be32(HFSPLUS_I(inode)->subfolders);
600 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
601 sizeof(struct hfsplus_cat_folder));
602 } else if (HFSPLUS_IS_RSRC(inode)) {
603 struct hfsplus_cat_file *file = &entry.file;
604 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
605 sizeof(struct hfsplus_cat_file));
606 hfsplus_inode_write_fork(inode, &file->rsrc_fork);
607 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
608 sizeof(struct hfsplus_cat_file));
610 struct hfsplus_cat_file *file = &entry.file;
612 if (fd.entrylength < sizeof(struct hfsplus_cat_file))
614 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
615 sizeof(struct hfsplus_cat_file));
616 hfsplus_inode_write_fork(inode, &file->data_fork);
617 hfsplus_cat_set_perms(inode, &file->permissions);
618 if (HFSPLUS_FLG_IMMUTABLE &
619 (file->permissions.rootflags |
620 file->permissions.userflags))
621 file->flags |= cpu_to_be16(HFSPLUS_FILE_LOCKED);
623 file->flags &= cpu_to_be16(~HFSPLUS_FILE_LOCKED);
624 file->access_date = hfsp_ut2mt(inode->i_atime);
625 file->content_mod_date = hfsp_ut2mt(inode->i_mtime);
626 file->attribute_mod_date = hfsp_ut2mt(inode->i_ctime);
627 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
628 sizeof(struct hfsplus_cat_file));
631 set_bit(HFSPLUS_I_CAT_DIRTY, &HFSPLUS_I(inode)->flags);
637 int hfsplus_fileattr_get(struct dentry *dentry, struct fileattr *fa)
639 struct inode *inode = d_inode(dentry);
640 struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
641 unsigned int flags = 0;
643 if (inode->i_flags & S_IMMUTABLE)
644 flags |= FS_IMMUTABLE_FL;
645 if (inode->i_flags & S_APPEND)
646 flags |= FS_APPEND_FL;
647 if (hip->userflags & HFSPLUS_FLG_NODUMP)
648 flags |= FS_NODUMP_FL;
650 fileattr_fill_flags(fa, flags);
655 int hfsplus_fileattr_set(struct user_namespace *mnt_userns,
656 struct dentry *dentry, struct fileattr *fa)
658 struct inode *inode = d_inode(dentry);
659 struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
660 unsigned int new_fl = 0;
662 if (fileattr_has_fsx(fa))
665 /* don't silently ignore unsupported ext2 flags */
666 if (fa->flags & ~(FS_IMMUTABLE_FL|FS_APPEND_FL|FS_NODUMP_FL))
669 if (fa->flags & FS_IMMUTABLE_FL)
670 new_fl |= S_IMMUTABLE;
672 if (fa->flags & FS_APPEND_FL)
675 inode_set_flags(inode, new_fl, S_IMMUTABLE | S_APPEND);
677 if (fa->flags & FS_NODUMP_FL)
678 hip->userflags |= HFSPLUS_FLG_NODUMP;
680 hip->userflags &= ~HFSPLUS_FLG_NODUMP;
682 inode->i_ctime = current_time(inode);
683 mark_inode_dirty(inode);