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 dentry *dentry, struct iattr *attr)
246 struct inode *inode = d_inode(dentry);
249 error = setattr_prepare(dentry, attr);
253 if ((attr->ia_valid & ATTR_SIZE) &&
254 attr->ia_size != i_size_read(inode)) {
255 inode_dio_wait(inode);
256 if (attr->ia_size > inode->i_size) {
257 error = generic_cont_expand_simple(inode,
262 truncate_setsize(inode, attr->ia_size);
263 hfsplus_file_truncate(inode);
266 setattr_copy(inode, attr);
267 mark_inode_dirty(inode);
272 int hfsplus_file_fsync(struct file *file, loff_t start, loff_t end,
275 struct inode *inode = file->f_mapping->host;
276 struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
277 struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb);
278 int error = 0, error2;
280 error = file_write_and_wait_range(file, start, end);
286 * Sync inode metadata into the catalog and extent trees.
288 sync_inode_metadata(inode, 1);
291 * And explicitly write out the btrees.
293 if (test_and_clear_bit(HFSPLUS_I_CAT_DIRTY, &hip->flags))
294 error = filemap_write_and_wait(sbi->cat_tree->inode->i_mapping);
296 if (test_and_clear_bit(HFSPLUS_I_EXT_DIRTY, &hip->flags)) {
298 filemap_write_and_wait(sbi->ext_tree->inode->i_mapping);
303 if (test_and_clear_bit(HFSPLUS_I_ATTR_DIRTY, &hip->flags)) {
304 if (sbi->attr_tree) {
306 filemap_write_and_wait(
307 sbi->attr_tree->inode->i_mapping);
311 pr_err("sync non-existent attributes tree\n");
315 if (test_and_clear_bit(HFSPLUS_I_ALLOC_DIRTY, &hip->flags)) {
316 error2 = filemap_write_and_wait(sbi->alloc_file->i_mapping);
321 if (!test_bit(HFSPLUS_SB_NOBARRIER, &sbi->flags))
322 blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL, NULL);
329 static const struct inode_operations hfsplus_file_inode_operations = {
330 .setattr = hfsplus_setattr,
331 .listxattr = hfsplus_listxattr,
334 static const struct file_operations hfsplus_file_operations = {
335 .llseek = generic_file_llseek,
336 .read_iter = generic_file_read_iter,
337 .write_iter = generic_file_write_iter,
338 .mmap = generic_file_mmap,
339 .splice_read = generic_file_splice_read,
340 .fsync = hfsplus_file_fsync,
341 .open = hfsplus_file_open,
342 .release = hfsplus_file_release,
343 .unlocked_ioctl = hfsplus_ioctl,
346 struct inode *hfsplus_new_inode(struct super_block *sb, struct inode *dir,
349 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
350 struct inode *inode = new_inode(sb);
351 struct hfsplus_inode_info *hip;
356 inode->i_ino = sbi->next_cnid++;
357 inode_init_owner(inode, dir, mode);
359 inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode);
361 hip = HFSPLUS_I(inode);
362 INIT_LIST_HEAD(&hip->open_dir_list);
363 spin_lock_init(&hip->open_dir_lock);
364 mutex_init(&hip->extents_lock);
365 atomic_set(&hip->opencnt, 0);
366 hip->extent_state = 0;
370 memset(hip->first_extents, 0, sizeof(hfsplus_extent_rec));
371 memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec));
372 hip->alloc_blocks = 0;
373 hip->first_blocks = 0;
374 hip->cached_start = 0;
375 hip->cached_blocks = 0;
378 hip->rsrc_inode = NULL;
379 if (S_ISDIR(inode->i_mode)) {
382 inode->i_op = &hfsplus_dir_inode_operations;
383 inode->i_fop = &hfsplus_dir_operations;
384 } else if (S_ISREG(inode->i_mode)) {
386 inode->i_op = &hfsplus_file_inode_operations;
387 inode->i_fop = &hfsplus_file_operations;
388 inode->i_mapping->a_ops = &hfsplus_aops;
389 hip->clump_blocks = sbi->data_clump_blocks;
390 } else if (S_ISLNK(inode->i_mode)) {
392 inode->i_op = &page_symlink_inode_operations;
393 inode_nohighmem(inode);
394 inode->i_mapping->a_ops = &hfsplus_aops;
395 hip->clump_blocks = 1;
398 insert_inode_hash(inode);
399 mark_inode_dirty(inode);
400 hfsplus_mark_mdb_dirty(sb);
405 void hfsplus_delete_inode(struct inode *inode)
407 struct super_block *sb = inode->i_sb;
409 if (S_ISDIR(inode->i_mode)) {
410 HFSPLUS_SB(sb)->folder_count--;
411 hfsplus_mark_mdb_dirty(sb);
414 HFSPLUS_SB(sb)->file_count--;
415 if (S_ISREG(inode->i_mode)) {
416 if (!inode->i_nlink) {
418 hfsplus_file_truncate(inode);
420 } else if (S_ISLNK(inode->i_mode)) {
422 hfsplus_file_truncate(inode);
424 hfsplus_mark_mdb_dirty(sb);
427 void hfsplus_inode_read_fork(struct inode *inode, struct hfsplus_fork_raw *fork)
429 struct super_block *sb = inode->i_sb;
430 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
431 struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
435 memcpy(&hip->first_extents, &fork->extents, sizeof(hfsplus_extent_rec));
436 for (count = 0, i = 0; i < 8; i++)
437 count += be32_to_cpu(fork->extents[i].block_count);
438 hip->first_blocks = count;
439 memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec));
440 hip->cached_start = 0;
441 hip->cached_blocks = 0;
443 hip->alloc_blocks = be32_to_cpu(fork->total_blocks);
444 hip->phys_size = inode->i_size = be64_to_cpu(fork->total_size);
446 (inode->i_size + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
447 inode_set_bytes(inode, hip->fs_blocks << sb->s_blocksize_bits);
449 be32_to_cpu(fork->clump_size) >> sbi->alloc_blksz_shift;
450 if (!hip->clump_blocks) {
451 hip->clump_blocks = HFSPLUS_IS_RSRC(inode) ?
452 sbi->rsrc_clump_blocks :
453 sbi->data_clump_blocks;
457 void hfsplus_inode_write_fork(struct inode *inode,
458 struct hfsplus_fork_raw *fork)
460 memcpy(&fork->extents, &HFSPLUS_I(inode)->first_extents,
461 sizeof(hfsplus_extent_rec));
462 fork->total_size = cpu_to_be64(inode->i_size);
463 fork->total_blocks = cpu_to_be32(HFSPLUS_I(inode)->alloc_blocks);
466 int hfsplus_cat_read_inode(struct inode *inode, struct hfs_find_data *fd)
468 hfsplus_cat_entry entry;
472 type = hfs_bnode_read_u16(fd->bnode, fd->entryoffset);
474 HFSPLUS_I(inode)->linkid = 0;
475 if (type == HFSPLUS_FOLDER) {
476 struct hfsplus_cat_folder *folder = &entry.folder;
478 if (fd->entrylength < sizeof(struct hfsplus_cat_folder))
480 hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
481 sizeof(struct hfsplus_cat_folder));
482 hfsplus_get_perms(inode, &folder->permissions, 1);
484 inode->i_size = 2 + be32_to_cpu(folder->valence);
485 inode->i_atime = timespec_to_timespec64(hfsp_mt2ut(folder->access_date));
486 inode->i_mtime = timespec_to_timespec64(hfsp_mt2ut(folder->content_mod_date));
487 inode->i_ctime = timespec_to_timespec64(hfsp_mt2ut(folder->attribute_mod_date));
488 HFSPLUS_I(inode)->create_date = folder->create_date;
489 HFSPLUS_I(inode)->fs_blocks = 0;
490 if (folder->flags & cpu_to_be16(HFSPLUS_HAS_FOLDER_COUNT)) {
491 HFSPLUS_I(inode)->subfolders =
492 be32_to_cpu(folder->subfolders);
494 inode->i_op = &hfsplus_dir_inode_operations;
495 inode->i_fop = &hfsplus_dir_operations;
496 } else if (type == HFSPLUS_FILE) {
497 struct hfsplus_cat_file *file = &entry.file;
499 if (fd->entrylength < sizeof(struct hfsplus_cat_file))
501 hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
502 sizeof(struct hfsplus_cat_file));
504 hfsplus_inode_read_fork(inode, HFSPLUS_IS_RSRC(inode) ?
505 &file->rsrc_fork : &file->data_fork);
506 hfsplus_get_perms(inode, &file->permissions, 0);
508 if (S_ISREG(inode->i_mode)) {
509 if (file->permissions.dev)
511 be32_to_cpu(file->permissions.dev));
512 inode->i_op = &hfsplus_file_inode_operations;
513 inode->i_fop = &hfsplus_file_operations;
514 inode->i_mapping->a_ops = &hfsplus_aops;
515 } else if (S_ISLNK(inode->i_mode)) {
516 inode->i_op = &page_symlink_inode_operations;
517 inode_nohighmem(inode);
518 inode->i_mapping->a_ops = &hfsplus_aops;
520 init_special_inode(inode, inode->i_mode,
521 be32_to_cpu(file->permissions.dev));
523 inode->i_atime = timespec_to_timespec64(hfsp_mt2ut(file->access_date));
524 inode->i_mtime = timespec_to_timespec64(hfsp_mt2ut(file->content_mod_date));
525 inode->i_ctime = timespec_to_timespec64(hfsp_mt2ut(file->attribute_mod_date));
526 HFSPLUS_I(inode)->create_date = file->create_date;
528 pr_err("bad catalog entry used to create inode\n");
534 int hfsplus_cat_write_inode(struct inode *inode)
536 struct inode *main_inode = inode;
537 struct hfs_find_data fd;
538 hfsplus_cat_entry entry;
540 if (HFSPLUS_IS_RSRC(inode))
541 main_inode = HFSPLUS_I(inode)->rsrc_inode;
543 if (!main_inode->i_nlink)
546 if (hfs_find_init(HFSPLUS_SB(main_inode->i_sb)->cat_tree, &fd))
550 if (hfsplus_find_cat(main_inode->i_sb, main_inode->i_ino, &fd))
554 if (S_ISDIR(main_inode->i_mode)) {
555 struct hfsplus_cat_folder *folder = &entry.folder;
557 if (fd.entrylength < sizeof(struct hfsplus_cat_folder))
559 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
560 sizeof(struct hfsplus_cat_folder));
561 /* simple node checks? */
562 hfsplus_cat_set_perms(inode, &folder->permissions);
563 folder->access_date = hfsp_ut2mt(inode->i_atime);
564 folder->content_mod_date = hfsp_ut2mt(inode->i_mtime);
565 folder->attribute_mod_date = hfsp_ut2mt(inode->i_ctime);
566 folder->valence = cpu_to_be32(inode->i_size - 2);
567 if (folder->flags & cpu_to_be16(HFSPLUS_HAS_FOLDER_COUNT)) {
569 cpu_to_be32(HFSPLUS_I(inode)->subfolders);
571 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
572 sizeof(struct hfsplus_cat_folder));
573 } else if (HFSPLUS_IS_RSRC(inode)) {
574 struct hfsplus_cat_file *file = &entry.file;
575 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
576 sizeof(struct hfsplus_cat_file));
577 hfsplus_inode_write_fork(inode, &file->rsrc_fork);
578 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
579 sizeof(struct hfsplus_cat_file));
581 struct hfsplus_cat_file *file = &entry.file;
583 if (fd.entrylength < sizeof(struct hfsplus_cat_file))
585 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
586 sizeof(struct hfsplus_cat_file));
587 hfsplus_inode_write_fork(inode, &file->data_fork);
588 hfsplus_cat_set_perms(inode, &file->permissions);
589 if (HFSPLUS_FLG_IMMUTABLE &
590 (file->permissions.rootflags |
591 file->permissions.userflags))
592 file->flags |= cpu_to_be16(HFSPLUS_FILE_LOCKED);
594 file->flags &= cpu_to_be16(~HFSPLUS_FILE_LOCKED);
595 file->access_date = hfsp_ut2mt(inode->i_atime);
596 file->content_mod_date = hfsp_ut2mt(inode->i_mtime);
597 file->attribute_mod_date = hfsp_ut2mt(inode->i_ctime);
598 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
599 sizeof(struct hfsplus_cat_file));
602 set_bit(HFSPLUS_I_CAT_DIRTY, &HFSPLUS_I(inode)->flags);