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"
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 ((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 dentry *dentry, struct iattr *attr)
247 struct inode *inode = d_inode(dentry);
250 error = setattr_prepare(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(inode, attr);
269 mark_inode_dirty(inode);
271 if (attr->ia_valid & ATTR_MODE) {
272 error = posix_acl_chmod(inode, inode->i_mode);
280 int hfsplus_file_fsync(struct file *file, loff_t start, loff_t end,
283 struct inode *inode = file->f_mapping->host;
284 struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
285 struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb);
286 int error = 0, error2;
288 error = file_write_and_wait_range(file, start, end);
294 * Sync inode metadata into the catalog and extent trees.
296 sync_inode_metadata(inode, 1);
299 * And explicitly write out the btrees.
301 if (test_and_clear_bit(HFSPLUS_I_CAT_DIRTY, &hip->flags))
302 error = filemap_write_and_wait(sbi->cat_tree->inode->i_mapping);
304 if (test_and_clear_bit(HFSPLUS_I_EXT_DIRTY, &hip->flags)) {
306 filemap_write_and_wait(sbi->ext_tree->inode->i_mapping);
311 if (test_and_clear_bit(HFSPLUS_I_ATTR_DIRTY, &hip->flags)) {
312 if (sbi->attr_tree) {
314 filemap_write_and_wait(
315 sbi->attr_tree->inode->i_mapping);
319 pr_err("sync non-existent attributes tree\n");
323 if (test_and_clear_bit(HFSPLUS_I_ALLOC_DIRTY, &hip->flags)) {
324 error2 = filemap_write_and_wait(sbi->alloc_file->i_mapping);
329 if (!test_bit(HFSPLUS_SB_NOBARRIER, &sbi->flags))
330 blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL, NULL);
337 static const struct inode_operations hfsplus_file_inode_operations = {
338 .setattr = hfsplus_setattr,
339 .listxattr = hfsplus_listxattr,
340 #ifdef CONFIG_HFSPLUS_FS_POSIX_ACL
341 .get_acl = hfsplus_get_posix_acl,
342 .set_acl = hfsplus_set_posix_acl,
346 static const struct file_operations hfsplus_file_operations = {
347 .llseek = generic_file_llseek,
348 .read_iter = generic_file_read_iter,
349 .write_iter = generic_file_write_iter,
350 .mmap = generic_file_mmap,
351 .splice_read = generic_file_splice_read,
352 .fsync = hfsplus_file_fsync,
353 .open = hfsplus_file_open,
354 .release = hfsplus_file_release,
355 .unlocked_ioctl = hfsplus_ioctl,
358 struct inode *hfsplus_new_inode(struct super_block *sb, umode_t mode)
360 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
361 struct inode *inode = new_inode(sb);
362 struct hfsplus_inode_info *hip;
367 inode->i_ino = sbi->next_cnid++;
368 inode->i_mode = mode;
369 inode->i_uid = current_fsuid();
370 inode->i_gid = current_fsgid();
372 inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode);
374 hip = HFSPLUS_I(inode);
375 INIT_LIST_HEAD(&hip->open_dir_list);
376 spin_lock_init(&hip->open_dir_lock);
377 mutex_init(&hip->extents_lock);
378 atomic_set(&hip->opencnt, 0);
379 hip->extent_state = 0;
383 memset(hip->first_extents, 0, sizeof(hfsplus_extent_rec));
384 memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec));
385 hip->alloc_blocks = 0;
386 hip->first_blocks = 0;
387 hip->cached_start = 0;
388 hip->cached_blocks = 0;
391 hip->rsrc_inode = NULL;
392 if (S_ISDIR(inode->i_mode)) {
395 inode->i_op = &hfsplus_dir_inode_operations;
396 inode->i_fop = &hfsplus_dir_operations;
397 } else if (S_ISREG(inode->i_mode)) {
399 inode->i_op = &hfsplus_file_inode_operations;
400 inode->i_fop = &hfsplus_file_operations;
401 inode->i_mapping->a_ops = &hfsplus_aops;
402 hip->clump_blocks = sbi->data_clump_blocks;
403 } else if (S_ISLNK(inode->i_mode)) {
405 inode->i_op = &page_symlink_inode_operations;
406 inode_nohighmem(inode);
407 inode->i_mapping->a_ops = &hfsplus_aops;
408 hip->clump_blocks = 1;
411 insert_inode_hash(inode);
412 mark_inode_dirty(inode);
413 hfsplus_mark_mdb_dirty(sb);
418 void hfsplus_delete_inode(struct inode *inode)
420 struct super_block *sb = inode->i_sb;
422 if (S_ISDIR(inode->i_mode)) {
423 HFSPLUS_SB(sb)->folder_count--;
424 hfsplus_mark_mdb_dirty(sb);
427 HFSPLUS_SB(sb)->file_count--;
428 if (S_ISREG(inode->i_mode)) {
429 if (!inode->i_nlink) {
431 hfsplus_file_truncate(inode);
433 } else if (S_ISLNK(inode->i_mode)) {
435 hfsplus_file_truncate(inode);
437 hfsplus_mark_mdb_dirty(sb);
440 void hfsplus_inode_read_fork(struct inode *inode, struct hfsplus_fork_raw *fork)
442 struct super_block *sb = inode->i_sb;
443 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
444 struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
448 memcpy(&hip->first_extents, &fork->extents, sizeof(hfsplus_extent_rec));
449 for (count = 0, i = 0; i < 8; i++)
450 count += be32_to_cpu(fork->extents[i].block_count);
451 hip->first_blocks = count;
452 memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec));
453 hip->cached_start = 0;
454 hip->cached_blocks = 0;
456 hip->alloc_blocks = be32_to_cpu(fork->total_blocks);
457 hip->phys_size = inode->i_size = be64_to_cpu(fork->total_size);
459 (inode->i_size + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
460 inode_set_bytes(inode, hip->fs_blocks << sb->s_blocksize_bits);
462 be32_to_cpu(fork->clump_size) >> sbi->alloc_blksz_shift;
463 if (!hip->clump_blocks) {
464 hip->clump_blocks = HFSPLUS_IS_RSRC(inode) ?
465 sbi->rsrc_clump_blocks :
466 sbi->data_clump_blocks;
470 void hfsplus_inode_write_fork(struct inode *inode,
471 struct hfsplus_fork_raw *fork)
473 memcpy(&fork->extents, &HFSPLUS_I(inode)->first_extents,
474 sizeof(hfsplus_extent_rec));
475 fork->total_size = cpu_to_be64(inode->i_size);
476 fork->total_blocks = cpu_to_be32(HFSPLUS_I(inode)->alloc_blocks);
479 int hfsplus_cat_read_inode(struct inode *inode, struct hfs_find_data *fd)
481 hfsplus_cat_entry entry;
485 type = hfs_bnode_read_u16(fd->bnode, fd->entryoffset);
487 HFSPLUS_I(inode)->linkid = 0;
488 if (type == HFSPLUS_FOLDER) {
489 struct hfsplus_cat_folder *folder = &entry.folder;
491 if (fd->entrylength < sizeof(struct hfsplus_cat_folder)) {
492 pr_err("bad catalog folder entry\n");
496 hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
497 sizeof(struct hfsplus_cat_folder));
498 hfsplus_get_perms(inode, &folder->permissions, 1);
500 inode->i_size = 2 + be32_to_cpu(folder->valence);
501 inode->i_atime = hfsp_mt2ut(folder->access_date);
502 inode->i_mtime = hfsp_mt2ut(folder->content_mod_date);
503 inode->i_ctime = hfsp_mt2ut(folder->attribute_mod_date);
504 HFSPLUS_I(inode)->create_date = folder->create_date;
505 HFSPLUS_I(inode)->fs_blocks = 0;
506 if (folder->flags & cpu_to_be16(HFSPLUS_HAS_FOLDER_COUNT)) {
507 HFSPLUS_I(inode)->subfolders =
508 be32_to_cpu(folder->subfolders);
510 inode->i_op = &hfsplus_dir_inode_operations;
511 inode->i_fop = &hfsplus_dir_operations;
512 } else if (type == HFSPLUS_FILE) {
513 struct hfsplus_cat_file *file = &entry.file;
515 if (fd->entrylength < sizeof(struct hfsplus_cat_file)) {
516 pr_err("bad catalog file entry\n");
520 hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
521 sizeof(struct hfsplus_cat_file));
523 hfsplus_inode_read_fork(inode, HFSPLUS_IS_RSRC(inode) ?
524 &file->rsrc_fork : &file->data_fork);
525 hfsplus_get_perms(inode, &file->permissions, 0);
527 if (S_ISREG(inode->i_mode)) {
528 if (file->permissions.dev)
530 be32_to_cpu(file->permissions.dev));
531 inode->i_op = &hfsplus_file_inode_operations;
532 inode->i_fop = &hfsplus_file_operations;
533 inode->i_mapping->a_ops = &hfsplus_aops;
534 } else if (S_ISLNK(inode->i_mode)) {
535 inode->i_op = &page_symlink_inode_operations;
536 inode_nohighmem(inode);
537 inode->i_mapping->a_ops = &hfsplus_aops;
539 init_special_inode(inode, inode->i_mode,
540 be32_to_cpu(file->permissions.dev));
542 inode->i_atime = hfsp_mt2ut(file->access_date);
543 inode->i_mtime = hfsp_mt2ut(file->content_mod_date);
544 inode->i_ctime = hfsp_mt2ut(file->attribute_mod_date);
545 HFSPLUS_I(inode)->create_date = file->create_date;
547 pr_err("bad catalog entry used to create inode\n");
554 int hfsplus_cat_write_inode(struct inode *inode)
556 struct inode *main_inode = inode;
557 struct hfs_find_data fd;
558 hfsplus_cat_entry entry;
561 if (HFSPLUS_IS_RSRC(inode))
562 main_inode = HFSPLUS_I(inode)->rsrc_inode;
564 if (!main_inode->i_nlink)
567 if (hfs_find_init(HFSPLUS_SB(main_inode->i_sb)->cat_tree, &fd))
571 if (hfsplus_find_cat(main_inode->i_sb, main_inode->i_ino, &fd))
575 if (S_ISDIR(main_inode->i_mode)) {
576 struct hfsplus_cat_folder *folder = &entry.folder;
578 if (fd.entrylength < sizeof(struct hfsplus_cat_folder)) {
579 pr_err("bad catalog folder entry\n");
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)) {
608 pr_err("bad catalog file entry\n");
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);