2 * linux/fs/hfsplus/inode.c
5 * Brad Boyer (flar@allandria.com)
6 * (C) 2003 Ardis Technologies <roman@ardistech.com>
8 * Inode handling routines
11 #include <linux/blkdev.h>
14 #include <linux/pagemap.h>
15 #include <linux/mpage.h>
16 #include <linux/sched.h>
17 #include <linux/uio.h>
19 #include "hfsplus_fs.h"
20 #include "hfsplus_raw.h"
24 static int hfsplus_readpage(struct file *file, struct page *page)
26 return block_read_full_page(page, hfsplus_get_block);
29 static int hfsplus_writepage(struct page *page, struct writeback_control *wbc)
31 return block_write_full_page(page, hfsplus_get_block, wbc);
34 static void hfsplus_write_failed(struct address_space *mapping, loff_t to)
36 struct inode *inode = mapping->host;
38 if (to > inode->i_size) {
39 truncate_pagecache(inode, inode->i_size);
40 hfsplus_file_truncate(inode);
44 static int hfsplus_write_begin(struct file *file, struct address_space *mapping,
45 loff_t pos, unsigned len, unsigned flags,
46 struct page **pagep, void **fsdata)
51 ret = cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
53 &HFSPLUS_I(mapping->host)->phys_size);
55 hfsplus_write_failed(mapping, pos + len);
60 static sector_t hfsplus_bmap(struct address_space *mapping, sector_t block)
62 return generic_block_bmap(mapping, block, hfsplus_get_block);
65 static int hfsplus_releasepage(struct page *page, gfp_t mask)
67 struct inode *inode = page->mapping->host;
68 struct super_block *sb = inode->i_sb;
69 struct hfs_btree *tree;
70 struct hfs_bnode *node;
74 switch (inode->i_ino) {
75 case HFSPLUS_EXT_CNID:
76 tree = HFSPLUS_SB(sb)->ext_tree;
78 case HFSPLUS_CAT_CNID:
79 tree = HFSPLUS_SB(sb)->cat_tree;
81 case HFSPLUS_ATTR_CNID:
82 tree = HFSPLUS_SB(sb)->attr_tree;
90 if (tree->node_size >= PAGE_CACHE_SIZE) {
92 (tree->node_size_shift - PAGE_CACHE_SHIFT);
93 spin_lock(&tree->hash_lock);
94 node = hfs_bnode_findhash(tree, nidx);
97 else if (atomic_read(&node->refcnt))
100 hfs_bnode_unhash(node);
101 hfs_bnode_free(node);
103 spin_unlock(&tree->hash_lock);
105 nidx = page->index <<
106 (PAGE_CACHE_SHIFT - tree->node_size_shift);
107 i = 1 << (PAGE_CACHE_SHIFT - tree->node_size_shift);
108 spin_lock(&tree->hash_lock);
110 node = hfs_bnode_findhash(tree, nidx++);
113 if (atomic_read(&node->refcnt)) {
117 hfs_bnode_unhash(node);
118 hfs_bnode_free(node);
119 } while (--i && nidx < tree->node_count);
120 spin_unlock(&tree->hash_lock);
122 return res ? try_to_free_buffers(page) : 0;
125 static ssize_t hfsplus_direct_IO(int rw, struct kiocb *iocb,
126 struct iov_iter *iter, loff_t offset)
128 struct file *file = iocb->ki_filp;
129 struct address_space *mapping = file->f_mapping;
130 struct inode *inode = file_inode(file)->i_mapping->host;
131 size_t count = iov_iter_count(iter);
134 ret = blockdev_direct_IO(rw, iocb, inode, iter, offset,
138 * In case of error extending write may have instantiated a few
139 * blocks outside i_size. Trim these off again.
141 if (unlikely((rw & WRITE) && ret < 0)) {
142 loff_t isize = i_size_read(inode);
143 loff_t end = offset + 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)) {
233 mutex_lock(&inode->i_mutex);
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);
240 mutex_unlock(&inode->i_mutex);
245 static int hfsplus_setattr(struct dentry *dentry, struct iattr *attr)
247 struct inode *inode = dentry->d_inode;
250 error = inode_change_ok(inode, attr);
254 if ((attr->ia_valid & ATTR_SIZE) &&
255 attr->ia_size != i_size_read(inode)) {
256 inode_dio_wait(inode);
257 truncate_setsize(inode, attr->ia_size);
258 hfsplus_file_truncate(inode);
261 setattr_copy(inode, attr);
262 mark_inode_dirty(inode);
264 if (attr->ia_valid & ATTR_MODE) {
265 error = posix_acl_chmod(inode, inode->i_mode);
273 int hfsplus_file_fsync(struct file *file, loff_t start, loff_t end,
276 struct inode *inode = file->f_mapping->host;
277 struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
278 struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb);
279 int error = 0, error2;
281 error = filemap_write_and_wait_range(inode->i_mapping, start, end);
284 mutex_lock(&inode->i_mutex);
287 * Sync inode metadata into the catalog and extent trees.
289 sync_inode_metadata(inode, 1);
292 * And explicitly write out the btrees.
294 if (test_and_clear_bit(HFSPLUS_I_CAT_DIRTY, &hip->flags))
295 error = filemap_write_and_wait(sbi->cat_tree->inode->i_mapping);
297 if (test_and_clear_bit(HFSPLUS_I_EXT_DIRTY, &hip->flags)) {
299 filemap_write_and_wait(sbi->ext_tree->inode->i_mapping);
304 if (test_and_clear_bit(HFSPLUS_I_ATTR_DIRTY, &hip->flags)) {
305 if (sbi->attr_tree) {
307 filemap_write_and_wait(
308 sbi->attr_tree->inode->i_mapping);
312 pr_err("sync non-existent attributes tree\n");
316 if (test_and_clear_bit(HFSPLUS_I_ALLOC_DIRTY, &hip->flags)) {
317 error2 = filemap_write_and_wait(sbi->alloc_file->i_mapping);
322 if (!test_bit(HFSPLUS_SB_NOBARRIER, &sbi->flags))
323 blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL, NULL);
325 mutex_unlock(&inode->i_mutex);
330 static const struct inode_operations hfsplus_file_inode_operations = {
331 .setattr = hfsplus_setattr,
332 .setxattr = generic_setxattr,
333 .getxattr = generic_getxattr,
334 .listxattr = hfsplus_listxattr,
335 .removexattr = generic_removexattr,
336 #ifdef CONFIG_HFSPLUS_FS_POSIX_ACL
337 .get_acl = hfsplus_get_posix_acl,
338 .set_acl = hfsplus_set_posix_acl,
342 static const struct file_operations hfsplus_file_operations = {
343 .llseek = generic_file_llseek,
344 .read_iter = generic_file_read_iter,
345 .write_iter = generic_file_write_iter,
346 .mmap = generic_file_mmap,
347 .splice_read = generic_file_splice_read,
348 .fsync = hfsplus_file_fsync,
349 .open = hfsplus_file_open,
350 .release = hfsplus_file_release,
351 .unlocked_ioctl = hfsplus_ioctl,
354 struct inode *hfsplus_new_inode(struct super_block *sb, umode_t mode)
356 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
357 struct inode *inode = new_inode(sb);
358 struct hfsplus_inode_info *hip;
363 inode->i_ino = sbi->next_cnid++;
364 inode->i_mode = mode;
365 inode->i_uid = current_fsuid();
366 inode->i_gid = current_fsgid();
368 inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME_SEC;
370 hip = HFSPLUS_I(inode);
371 INIT_LIST_HEAD(&hip->open_dir_list);
372 mutex_init(&hip->extents_lock);
373 atomic_set(&hip->opencnt, 0);
374 hip->extent_state = 0;
378 memset(hip->first_extents, 0, sizeof(hfsplus_extent_rec));
379 memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec));
380 hip->alloc_blocks = 0;
381 hip->first_blocks = 0;
382 hip->cached_start = 0;
383 hip->cached_blocks = 0;
386 hip->rsrc_inode = NULL;
387 if (S_ISDIR(inode->i_mode)) {
390 inode->i_op = &hfsplus_dir_inode_operations;
391 inode->i_fop = &hfsplus_dir_operations;
392 } else if (S_ISREG(inode->i_mode)) {
394 inode->i_op = &hfsplus_file_inode_operations;
395 inode->i_fop = &hfsplus_file_operations;
396 inode->i_mapping->a_ops = &hfsplus_aops;
397 hip->clump_blocks = sbi->data_clump_blocks;
398 } else if (S_ISLNK(inode->i_mode)) {
400 inode->i_op = &page_symlink_inode_operations;
401 inode->i_mapping->a_ops = &hfsplus_aops;
402 hip->clump_blocks = 1;
405 insert_inode_hash(inode);
406 mark_inode_dirty(inode);
407 hfsplus_mark_mdb_dirty(sb);
412 void hfsplus_delete_inode(struct inode *inode)
414 struct super_block *sb = inode->i_sb;
416 if (S_ISDIR(inode->i_mode)) {
417 HFSPLUS_SB(sb)->folder_count--;
418 hfsplus_mark_mdb_dirty(sb);
421 HFSPLUS_SB(sb)->file_count--;
422 if (S_ISREG(inode->i_mode)) {
423 if (!inode->i_nlink) {
425 hfsplus_file_truncate(inode);
427 } else if (S_ISLNK(inode->i_mode)) {
429 hfsplus_file_truncate(inode);
431 hfsplus_mark_mdb_dirty(sb);
434 void hfsplus_inode_read_fork(struct inode *inode, struct hfsplus_fork_raw *fork)
436 struct super_block *sb = inode->i_sb;
437 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
438 struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
442 memcpy(&hip->first_extents, &fork->extents, sizeof(hfsplus_extent_rec));
443 for (count = 0, i = 0; i < 8; i++)
444 count += be32_to_cpu(fork->extents[i].block_count);
445 hip->first_blocks = count;
446 memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec));
447 hip->cached_start = 0;
448 hip->cached_blocks = 0;
450 hip->alloc_blocks = be32_to_cpu(fork->total_blocks);
451 hip->phys_size = inode->i_size = be64_to_cpu(fork->total_size);
453 (inode->i_size + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
454 inode_set_bytes(inode, hip->fs_blocks << sb->s_blocksize_bits);
456 be32_to_cpu(fork->clump_size) >> sbi->alloc_blksz_shift;
457 if (!hip->clump_blocks) {
458 hip->clump_blocks = HFSPLUS_IS_RSRC(inode) ?
459 sbi->rsrc_clump_blocks :
460 sbi->data_clump_blocks;
464 void hfsplus_inode_write_fork(struct inode *inode,
465 struct hfsplus_fork_raw *fork)
467 memcpy(&fork->extents, &HFSPLUS_I(inode)->first_extents,
468 sizeof(hfsplus_extent_rec));
469 fork->total_size = cpu_to_be64(inode->i_size);
470 fork->total_blocks = cpu_to_be32(HFSPLUS_I(inode)->alloc_blocks);
473 int hfsplus_cat_read_inode(struct inode *inode, struct hfs_find_data *fd)
475 hfsplus_cat_entry entry;
479 type = hfs_bnode_read_u16(fd->bnode, fd->entryoffset);
481 HFSPLUS_I(inode)->linkid = 0;
482 if (type == HFSPLUS_FOLDER) {
483 struct hfsplus_cat_folder *folder = &entry.folder;
485 if (fd->entrylength < sizeof(struct hfsplus_cat_folder))
487 hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
488 sizeof(struct hfsplus_cat_folder));
489 hfsplus_get_perms(inode, &folder->permissions, 1);
491 inode->i_size = 2 + be32_to_cpu(folder->valence);
492 inode->i_atime = hfsp_mt2ut(folder->access_date);
493 inode->i_mtime = hfsp_mt2ut(folder->content_mod_date);
494 inode->i_ctime = hfsp_mt2ut(folder->attribute_mod_date);
495 HFSPLUS_I(inode)->create_date = folder->create_date;
496 HFSPLUS_I(inode)->fs_blocks = 0;
497 if (folder->flags & cpu_to_be16(HFSPLUS_HAS_FOLDER_COUNT)) {
498 HFSPLUS_I(inode)->subfolders =
499 be32_to_cpu(folder->subfolders);
501 inode->i_op = &hfsplus_dir_inode_operations;
502 inode->i_fop = &hfsplus_dir_operations;
503 } else if (type == HFSPLUS_FILE) {
504 struct hfsplus_cat_file *file = &entry.file;
506 if (fd->entrylength < sizeof(struct hfsplus_cat_file))
508 hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
509 sizeof(struct hfsplus_cat_file));
511 hfsplus_inode_read_fork(inode, HFSPLUS_IS_RSRC(inode) ?
512 &file->rsrc_fork : &file->data_fork);
513 hfsplus_get_perms(inode, &file->permissions, 0);
515 if (S_ISREG(inode->i_mode)) {
516 if (file->permissions.dev)
518 be32_to_cpu(file->permissions.dev));
519 inode->i_op = &hfsplus_file_inode_operations;
520 inode->i_fop = &hfsplus_file_operations;
521 inode->i_mapping->a_ops = &hfsplus_aops;
522 } else if (S_ISLNK(inode->i_mode)) {
523 inode->i_op = &page_symlink_inode_operations;
524 inode->i_mapping->a_ops = &hfsplus_aops;
526 init_special_inode(inode, inode->i_mode,
527 be32_to_cpu(file->permissions.dev));
529 inode->i_atime = hfsp_mt2ut(file->access_date);
530 inode->i_mtime = hfsp_mt2ut(file->content_mod_date);
531 inode->i_ctime = hfsp_mt2ut(file->attribute_mod_date);
532 HFSPLUS_I(inode)->create_date = file->create_date;
534 pr_err("bad catalog entry used to create inode\n");
540 int hfsplus_cat_write_inode(struct inode *inode)
542 struct inode *main_inode = inode;
543 struct hfs_find_data fd;
544 hfsplus_cat_entry entry;
546 if (HFSPLUS_IS_RSRC(inode))
547 main_inode = HFSPLUS_I(inode)->rsrc_inode;
549 if (!main_inode->i_nlink)
552 if (hfs_find_init(HFSPLUS_SB(main_inode->i_sb)->cat_tree, &fd))
556 if (hfsplus_find_cat(main_inode->i_sb, main_inode->i_ino, &fd))
560 if (S_ISDIR(main_inode->i_mode)) {
561 struct hfsplus_cat_folder *folder = &entry.folder;
563 if (fd.entrylength < sizeof(struct hfsplus_cat_folder))
565 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
566 sizeof(struct hfsplus_cat_folder));
567 /* simple node checks? */
568 hfsplus_cat_set_perms(inode, &folder->permissions);
569 folder->access_date = hfsp_ut2mt(inode->i_atime);
570 folder->content_mod_date = hfsp_ut2mt(inode->i_mtime);
571 folder->attribute_mod_date = hfsp_ut2mt(inode->i_ctime);
572 folder->valence = cpu_to_be32(inode->i_size - 2);
573 if (folder->flags & cpu_to_be16(HFSPLUS_HAS_FOLDER_COUNT)) {
575 cpu_to_be32(HFSPLUS_I(inode)->subfolders);
577 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
578 sizeof(struct hfsplus_cat_folder));
579 } else if (HFSPLUS_IS_RSRC(inode)) {
580 struct hfsplus_cat_file *file = &entry.file;
581 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
582 sizeof(struct hfsplus_cat_file));
583 hfsplus_inode_write_fork(inode, &file->rsrc_fork);
584 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
585 sizeof(struct hfsplus_cat_file));
587 struct hfsplus_cat_file *file = &entry.file;
589 if (fd.entrylength < sizeof(struct hfsplus_cat_file))
591 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
592 sizeof(struct hfsplus_cat_file));
593 hfsplus_inode_write_fork(inode, &file->data_fork);
594 hfsplus_cat_set_perms(inode, &file->permissions);
595 if (HFSPLUS_FLG_IMMUTABLE &
596 (file->permissions.rootflags |
597 file->permissions.userflags))
598 file->flags |= cpu_to_be16(HFSPLUS_FILE_LOCKED);
600 file->flags &= cpu_to_be16(~HFSPLUS_FILE_LOCKED);
601 file->access_date = hfsp_ut2mt(inode->i_atime);
602 file->content_mod_date = hfsp_ut2mt(inode->i_mtime);
603 file->attribute_mod_date = hfsp_ut2mt(inode->i_ctime);
604 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
605 sizeof(struct hfsplus_cat_file));
608 set_bit(HFSPLUS_I_CAT_DIRTY, &HFSPLUS_I(inode)->flags);