1 // SPDX-License-Identifier: GPL-2.0
3 * linux/fs/hfsplus/inode.c
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_read_folio(struct file *file, struct folio *folio)
28 return block_read_full_folio(folio, hfsplus_get_block);
31 static void hfsplus_write_failed(struct address_space *mapping, loff_t to)
33 struct inode *inode = mapping->host;
35 if (to > inode->i_size) {
36 truncate_pagecache(inode, inode->i_size);
37 hfsplus_file_truncate(inode);
41 int hfsplus_write_begin(struct file *file, struct address_space *mapping,
42 loff_t pos, unsigned len, struct page **pagep, void **fsdata)
47 ret = cont_write_begin(file, mapping, pos, len, pagep, fsdata,
49 &HFSPLUS_I(mapping->host)->phys_size);
51 hfsplus_write_failed(mapping, pos + len);
56 static sector_t hfsplus_bmap(struct address_space *mapping, sector_t block)
58 return generic_block_bmap(mapping, block, hfsplus_get_block);
61 static bool hfsplus_release_folio(struct folio *folio, gfp_t mask)
63 struct inode *inode = folio->mapping->host;
64 struct super_block *sb = inode->i_sb;
65 struct hfs_btree *tree;
66 struct hfs_bnode *node;
71 switch (inode->i_ino) {
72 case HFSPLUS_EXT_CNID:
73 tree = HFSPLUS_SB(sb)->ext_tree;
75 case HFSPLUS_CAT_CNID:
76 tree = HFSPLUS_SB(sb)->cat_tree;
78 case HFSPLUS_ATTR_CNID:
79 tree = HFSPLUS_SB(sb)->attr_tree;
87 if (tree->node_size >= PAGE_SIZE) {
88 nidx = folio->index >>
89 (tree->node_size_shift - PAGE_SHIFT);
90 spin_lock(&tree->hash_lock);
91 node = hfs_bnode_findhash(tree, nidx);
94 else if (atomic_read(&node->refcnt))
97 hfs_bnode_unhash(node);
100 spin_unlock(&tree->hash_lock);
102 nidx = folio->index <<
103 (PAGE_SHIFT - tree->node_size_shift);
104 i = 1 << (PAGE_SHIFT - tree->node_size_shift);
105 spin_lock(&tree->hash_lock);
107 node = hfs_bnode_findhash(tree, nidx++);
110 if (atomic_read(&node->refcnt)) {
114 hfs_bnode_unhash(node);
115 hfs_bnode_free(node);
116 } while (--i && nidx < tree->node_count);
117 spin_unlock(&tree->hash_lock);
119 return res ? try_to_free_buffers(folio) : false;
122 static ssize_t hfsplus_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
124 struct file *file = iocb->ki_filp;
125 struct address_space *mapping = file->f_mapping;
126 struct inode *inode = mapping->host;
127 size_t count = iov_iter_count(iter);
130 ret = blockdev_direct_IO(iocb, inode, iter, hfsplus_get_block);
133 * In case of error extending write may have instantiated a few
134 * blocks outside i_size. Trim these off again.
136 if (unlikely(iov_iter_rw(iter) == WRITE && ret < 0)) {
137 loff_t isize = i_size_read(inode);
138 loff_t end = iocb->ki_pos + count;
141 hfsplus_write_failed(mapping, end);
147 static int hfsplus_writepages(struct address_space *mapping,
148 struct writeback_control *wbc)
150 return mpage_writepages(mapping, wbc, hfsplus_get_block);
153 const struct address_space_operations hfsplus_btree_aops = {
154 .dirty_folio = block_dirty_folio,
155 .invalidate_folio = block_invalidate_folio,
156 .read_folio = hfsplus_read_folio,
157 .writepages = hfsplus_writepages,
158 .write_begin = hfsplus_write_begin,
159 .write_end = generic_write_end,
160 .migrate_folio = buffer_migrate_folio,
161 .bmap = hfsplus_bmap,
162 .release_folio = hfsplus_release_folio,
165 const struct address_space_operations hfsplus_aops = {
166 .dirty_folio = block_dirty_folio,
167 .invalidate_folio = block_invalidate_folio,
168 .read_folio = hfsplus_read_folio,
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,
174 .migrate_folio = buffer_migrate_folio,
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 ((test_bit(HFSPLUS_SB_UID, &sbi->flags)) || (!i_uid_read(inode) && !mode))
192 inode->i_uid = sbi->uid;
194 i_gid_write(inode, be32_to_cpu(perms->group));
195 if ((test_bit(HFSPLUS_SB_GID, &sbi->flags)) || (!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 mnt_idmap *idmap,
246 struct dentry *dentry, struct iattr *attr)
248 struct inode *inode = d_inode(dentry);
251 error = setattr_prepare(&nop_mnt_idmap, 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_set_mtime_to_ts(inode, inode_set_ctime_current(inode));
269 setattr_copy(&nop_mnt_idmap, inode, attr);
270 mark_inode_dirty(inode);
275 int hfsplus_getattr(struct mnt_idmap *idmap, 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 (request_mask & STATX_BTIME) {
283 stat->result_mask |= STATX_BTIME;
284 stat->btime = hfsp_mt2ut(hip->create_date);
287 if (inode->i_flags & S_APPEND)
288 stat->attributes |= STATX_ATTR_APPEND;
289 if (inode->i_flags & S_IMMUTABLE)
290 stat->attributes |= STATX_ATTR_IMMUTABLE;
291 if (hip->userflags & HFSPLUS_FLG_NODUMP)
292 stat->attributes |= STATX_ATTR_NODUMP;
294 stat->attributes_mask |= STATX_ATTR_APPEND | STATX_ATTR_IMMUTABLE |
297 generic_fillattr(&nop_mnt_idmap, request_mask, inode, stat);
301 int hfsplus_file_fsync(struct file *file, loff_t start, loff_t end,
304 struct inode *inode = file->f_mapping->host;
305 struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
306 struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb);
307 int error = 0, error2;
309 error = file_write_and_wait_range(file, start, end);
315 * Sync inode metadata into the catalog and extent trees.
317 sync_inode_metadata(inode, 1);
320 * And explicitly write out the btrees.
322 if (test_and_clear_bit(HFSPLUS_I_CAT_DIRTY, &hip->flags))
323 error = filemap_write_and_wait(sbi->cat_tree->inode->i_mapping);
325 if (test_and_clear_bit(HFSPLUS_I_EXT_DIRTY, &hip->flags)) {
327 filemap_write_and_wait(sbi->ext_tree->inode->i_mapping);
332 if (test_and_clear_bit(HFSPLUS_I_ATTR_DIRTY, &hip->flags)) {
333 if (sbi->attr_tree) {
335 filemap_write_and_wait(
336 sbi->attr_tree->inode->i_mapping);
340 pr_err("sync non-existent attributes tree\n");
344 if (test_and_clear_bit(HFSPLUS_I_ALLOC_DIRTY, &hip->flags)) {
345 error2 = filemap_write_and_wait(sbi->alloc_file->i_mapping);
350 if (!test_bit(HFSPLUS_SB_NOBARRIER, &sbi->flags))
351 blkdev_issue_flush(inode->i_sb->s_bdev);
358 static const struct inode_operations hfsplus_file_inode_operations = {
359 .setattr = hfsplus_setattr,
360 .getattr = hfsplus_getattr,
361 .listxattr = hfsplus_listxattr,
362 .fileattr_get = hfsplus_fileattr_get,
363 .fileattr_set = hfsplus_fileattr_set,
366 static const struct file_operations hfsplus_file_operations = {
367 .llseek = generic_file_llseek,
368 .read_iter = generic_file_read_iter,
369 .write_iter = generic_file_write_iter,
370 .mmap = generic_file_mmap,
371 .splice_read = filemap_splice_read,
372 .fsync = hfsplus_file_fsync,
373 .open = hfsplus_file_open,
374 .release = hfsplus_file_release,
375 .unlocked_ioctl = hfsplus_ioctl,
378 struct inode *hfsplus_new_inode(struct super_block *sb, struct inode *dir,
381 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
382 struct inode *inode = new_inode(sb);
383 struct hfsplus_inode_info *hip;
388 inode->i_ino = sbi->next_cnid++;
389 inode_init_owner(&nop_mnt_idmap, inode, dir, mode);
391 simple_inode_init_ts(inode);
393 hip = HFSPLUS_I(inode);
394 INIT_LIST_HEAD(&hip->open_dir_list);
395 spin_lock_init(&hip->open_dir_lock);
396 mutex_init(&hip->extents_lock);
397 atomic_set(&hip->opencnt, 0);
398 hip->extent_state = 0;
402 memset(hip->first_extents, 0, sizeof(hfsplus_extent_rec));
403 memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec));
404 hip->alloc_blocks = 0;
405 hip->first_blocks = 0;
406 hip->cached_start = 0;
407 hip->cached_blocks = 0;
410 hip->rsrc_inode = NULL;
411 if (S_ISDIR(inode->i_mode)) {
414 inode->i_op = &hfsplus_dir_inode_operations;
415 inode->i_fop = &hfsplus_dir_operations;
416 } else if (S_ISREG(inode->i_mode)) {
418 inode->i_op = &hfsplus_file_inode_operations;
419 inode->i_fop = &hfsplus_file_operations;
420 inode->i_mapping->a_ops = &hfsplus_aops;
421 hip->clump_blocks = sbi->data_clump_blocks;
422 } else if (S_ISLNK(inode->i_mode)) {
424 inode->i_op = &page_symlink_inode_operations;
425 inode_nohighmem(inode);
426 inode->i_mapping->a_ops = &hfsplus_aops;
427 hip->clump_blocks = 1;
430 insert_inode_hash(inode);
431 mark_inode_dirty(inode);
432 hfsplus_mark_mdb_dirty(sb);
437 void hfsplus_delete_inode(struct inode *inode)
439 struct super_block *sb = inode->i_sb;
441 if (S_ISDIR(inode->i_mode)) {
442 HFSPLUS_SB(sb)->folder_count--;
443 hfsplus_mark_mdb_dirty(sb);
446 HFSPLUS_SB(sb)->file_count--;
447 if (S_ISREG(inode->i_mode)) {
448 if (!inode->i_nlink) {
450 hfsplus_file_truncate(inode);
452 } else if (S_ISLNK(inode->i_mode)) {
454 hfsplus_file_truncate(inode);
456 hfsplus_mark_mdb_dirty(sb);
459 void hfsplus_inode_read_fork(struct inode *inode, struct hfsplus_fork_raw *fork)
461 struct super_block *sb = inode->i_sb;
462 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
463 struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
467 memcpy(&hip->first_extents, &fork->extents, sizeof(hfsplus_extent_rec));
468 for (count = 0, i = 0; i < 8; i++)
469 count += be32_to_cpu(fork->extents[i].block_count);
470 hip->first_blocks = count;
471 memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec));
472 hip->cached_start = 0;
473 hip->cached_blocks = 0;
475 hip->alloc_blocks = be32_to_cpu(fork->total_blocks);
476 hip->phys_size = inode->i_size = be64_to_cpu(fork->total_size);
478 (inode->i_size + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
479 inode_set_bytes(inode, hip->fs_blocks << sb->s_blocksize_bits);
481 be32_to_cpu(fork->clump_size) >> sbi->alloc_blksz_shift;
482 if (!hip->clump_blocks) {
483 hip->clump_blocks = HFSPLUS_IS_RSRC(inode) ?
484 sbi->rsrc_clump_blocks :
485 sbi->data_clump_blocks;
489 void hfsplus_inode_write_fork(struct inode *inode,
490 struct hfsplus_fork_raw *fork)
492 memcpy(&fork->extents, &HFSPLUS_I(inode)->first_extents,
493 sizeof(hfsplus_extent_rec));
494 fork->total_size = cpu_to_be64(inode->i_size);
495 fork->total_blocks = cpu_to_be32(HFSPLUS_I(inode)->alloc_blocks);
498 int hfsplus_cat_read_inode(struct inode *inode, struct hfs_find_data *fd)
500 hfsplus_cat_entry entry;
504 type = hfs_bnode_read_u16(fd->bnode, fd->entryoffset);
506 HFSPLUS_I(inode)->linkid = 0;
507 if (type == HFSPLUS_FOLDER) {
508 struct hfsplus_cat_folder *folder = &entry.folder;
510 if (fd->entrylength < sizeof(struct hfsplus_cat_folder)) {
511 pr_err("bad catalog folder entry\n");
515 hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
516 sizeof(struct hfsplus_cat_folder));
517 hfsplus_get_perms(inode, &folder->permissions, 1);
519 inode->i_size = 2 + be32_to_cpu(folder->valence);
520 inode_set_atime_to_ts(inode, hfsp_mt2ut(folder->access_date));
521 inode_set_mtime_to_ts(inode,
522 hfsp_mt2ut(folder->content_mod_date));
523 inode_set_ctime_to_ts(inode,
524 hfsp_mt2ut(folder->attribute_mod_date));
525 HFSPLUS_I(inode)->create_date = folder->create_date;
526 HFSPLUS_I(inode)->fs_blocks = 0;
527 if (folder->flags & cpu_to_be16(HFSPLUS_HAS_FOLDER_COUNT)) {
528 HFSPLUS_I(inode)->subfolders =
529 be32_to_cpu(folder->subfolders);
531 inode->i_op = &hfsplus_dir_inode_operations;
532 inode->i_fop = &hfsplus_dir_operations;
533 } else if (type == HFSPLUS_FILE) {
534 struct hfsplus_cat_file *file = &entry.file;
536 if (fd->entrylength < sizeof(struct hfsplus_cat_file)) {
537 pr_err("bad catalog file entry\n");
541 hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
542 sizeof(struct hfsplus_cat_file));
544 hfsplus_inode_read_fork(inode, HFSPLUS_IS_RSRC(inode) ?
545 &file->rsrc_fork : &file->data_fork);
546 hfsplus_get_perms(inode, &file->permissions, 0);
548 if (S_ISREG(inode->i_mode)) {
549 if (file->permissions.dev)
551 be32_to_cpu(file->permissions.dev));
552 inode->i_op = &hfsplus_file_inode_operations;
553 inode->i_fop = &hfsplus_file_operations;
554 inode->i_mapping->a_ops = &hfsplus_aops;
555 } else if (S_ISLNK(inode->i_mode)) {
556 inode->i_op = &page_symlink_inode_operations;
557 inode_nohighmem(inode);
558 inode->i_mapping->a_ops = &hfsplus_aops;
560 init_special_inode(inode, inode->i_mode,
561 be32_to_cpu(file->permissions.dev));
563 inode_set_atime_to_ts(inode, hfsp_mt2ut(file->access_date));
564 inode_set_mtime_to_ts(inode,
565 hfsp_mt2ut(file->content_mod_date));
566 inode_set_ctime_to_ts(inode,
567 hfsp_mt2ut(file->attribute_mod_date));
568 HFSPLUS_I(inode)->create_date = file->create_date;
570 pr_err("bad catalog entry used to create inode\n");
577 int hfsplus_cat_write_inode(struct inode *inode)
579 struct inode *main_inode = inode;
580 struct hfs_find_data fd;
581 hfsplus_cat_entry entry;
584 if (HFSPLUS_IS_RSRC(inode))
585 main_inode = HFSPLUS_I(inode)->rsrc_inode;
587 if (!main_inode->i_nlink)
590 if (hfs_find_init(HFSPLUS_SB(main_inode->i_sb)->cat_tree, &fd))
594 if (hfsplus_find_cat(main_inode->i_sb, main_inode->i_ino, &fd))
598 if (S_ISDIR(main_inode->i_mode)) {
599 struct hfsplus_cat_folder *folder = &entry.folder;
601 if (fd.entrylength < sizeof(struct hfsplus_cat_folder)) {
602 pr_err("bad catalog folder entry\n");
606 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
607 sizeof(struct hfsplus_cat_folder));
608 /* simple node checks? */
609 hfsplus_cat_set_perms(inode, &folder->permissions);
610 folder->access_date = hfsp_ut2mt(inode_get_atime(inode));
611 folder->content_mod_date = hfsp_ut2mt(inode_get_mtime(inode));
612 folder->attribute_mod_date = hfsp_ut2mt(inode_get_ctime(inode));
613 folder->valence = cpu_to_be32(inode->i_size - 2);
614 if (folder->flags & cpu_to_be16(HFSPLUS_HAS_FOLDER_COUNT)) {
616 cpu_to_be32(HFSPLUS_I(inode)->subfolders);
618 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
619 sizeof(struct hfsplus_cat_folder));
620 } else if (HFSPLUS_IS_RSRC(inode)) {
621 struct hfsplus_cat_file *file = &entry.file;
622 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
623 sizeof(struct hfsplus_cat_file));
624 hfsplus_inode_write_fork(inode, &file->rsrc_fork);
625 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
626 sizeof(struct hfsplus_cat_file));
628 struct hfsplus_cat_file *file = &entry.file;
630 if (fd.entrylength < sizeof(struct hfsplus_cat_file)) {
631 pr_err("bad catalog file entry\n");
635 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
636 sizeof(struct hfsplus_cat_file));
637 hfsplus_inode_write_fork(inode, &file->data_fork);
638 hfsplus_cat_set_perms(inode, &file->permissions);
639 if (HFSPLUS_FLG_IMMUTABLE &
640 (file->permissions.rootflags |
641 file->permissions.userflags))
642 file->flags |= cpu_to_be16(HFSPLUS_FILE_LOCKED);
644 file->flags &= cpu_to_be16(~HFSPLUS_FILE_LOCKED);
645 file->access_date = hfsp_ut2mt(inode_get_atime(inode));
646 file->content_mod_date = hfsp_ut2mt(inode_get_mtime(inode));
647 file->attribute_mod_date = hfsp_ut2mt(inode_get_ctime(inode));
648 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
649 sizeof(struct hfsplus_cat_file));
652 set_bit(HFSPLUS_I_CAT_DIRTY, &HFSPLUS_I(inode)->flags);
658 int hfsplus_fileattr_get(struct dentry *dentry, struct fileattr *fa)
660 struct inode *inode = d_inode(dentry);
661 struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
662 unsigned int flags = 0;
664 if (inode->i_flags & S_IMMUTABLE)
665 flags |= FS_IMMUTABLE_FL;
666 if (inode->i_flags & S_APPEND)
667 flags |= FS_APPEND_FL;
668 if (hip->userflags & HFSPLUS_FLG_NODUMP)
669 flags |= FS_NODUMP_FL;
671 fileattr_fill_flags(fa, flags);
676 int hfsplus_fileattr_set(struct mnt_idmap *idmap,
677 struct dentry *dentry, struct fileattr *fa)
679 struct inode *inode = d_inode(dentry);
680 struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
681 unsigned int new_fl = 0;
683 if (fileattr_has_fsx(fa))
686 /* don't silently ignore unsupported ext2 flags */
687 if (fa->flags & ~(FS_IMMUTABLE_FL|FS_APPEND_FL|FS_NODUMP_FL))
690 if (fa->flags & FS_IMMUTABLE_FL)
691 new_fl |= S_IMMUTABLE;
693 if (fa->flags & FS_APPEND_FL)
696 inode_set_flags(inode, new_fl, S_IMMUTABLE | S_APPEND);
698 if (fa->flags & FS_NODUMP_FL)
699 hip->userflags |= HFSPLUS_FLG_NODUMP;
701 hip->userflags &= ~HFSPLUS_FLG_NODUMP;
703 inode_set_ctime_current(inode);
704 mark_inode_dirty(inode);