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/aio.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 const struct iovec *iov, loff_t offset, unsigned long nr_segs)
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;
133 ret = blockdev_direct_IO(rw, iocb, inode, iov, offset, nr_segs,
137 * In case of error extending write may have instantiated a few
138 * blocks outside i_size. Trim these off again.
140 if (unlikely((rw & WRITE) && ret < 0)) {
141 loff_t isize = i_size_read(inode);
142 loff_t end = offset + iov_length(iov, nr_segs);
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 struct dentry *hfsplus_file_lookup(struct inode *dir,
182 struct dentry *dentry, unsigned int flags)
184 struct hfs_find_data fd;
185 struct super_block *sb = dir->i_sb;
186 struct inode *inode = NULL;
187 struct hfsplus_inode_info *hip;
190 if (HFSPLUS_IS_RSRC(dir) || strcmp(dentry->d_name.name, "rsrc"))
193 inode = HFSPLUS_I(dir)->rsrc_inode;
197 inode = new_inode(sb);
199 return ERR_PTR(-ENOMEM);
201 hip = HFSPLUS_I(inode);
202 inode->i_ino = dir->i_ino;
203 INIT_LIST_HEAD(&hip->open_dir_list);
204 mutex_init(&hip->extents_lock);
205 hip->extent_state = 0;
208 set_bit(HFSPLUS_I_RSRC, &hip->flags);
210 err = hfs_find_init(HFSPLUS_SB(sb)->cat_tree, &fd);
212 err = hfsplus_find_cat(sb, dir->i_ino, &fd);
214 err = hfsplus_cat_read_inode(inode, &fd);
221 hip->rsrc_inode = dir;
222 HFSPLUS_I(dir)->rsrc_inode = inode;
226 * __mark_inode_dirty expects inodes to be hashed. Since we don't
227 * want resource fork inodes in the regular inode space, we make them
228 * appear hashed, but do not put on any lists. hlist_del()
229 * will work fine and require no locking.
231 hlist_add_fake(&inode->i_hash);
233 mark_inode_dirty(inode);
235 d_add(dentry, inode);
239 static void hfsplus_get_perms(struct inode *inode,
240 struct hfsplus_perm *perms, int dir)
242 struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb);
245 mode = be16_to_cpu(perms->mode);
247 i_uid_write(inode, be32_to_cpu(perms->owner));
248 if (!i_uid_read(inode) && !mode)
249 inode->i_uid = sbi->uid;
251 i_gid_write(inode, be32_to_cpu(perms->group));
252 if (!i_gid_read(inode) && !mode)
253 inode->i_gid = sbi->gid;
256 mode = mode ? (mode & S_IALLUGO) : (S_IRWXUGO & ~(sbi->umask));
259 mode = S_IFREG | ((S_IRUGO|S_IWUGO) & ~(sbi->umask));
260 inode->i_mode = mode;
262 HFSPLUS_I(inode)->userflags = perms->userflags;
263 if (perms->rootflags & HFSPLUS_FLG_IMMUTABLE)
264 inode->i_flags |= S_IMMUTABLE;
266 inode->i_flags &= ~S_IMMUTABLE;
267 if (perms->rootflags & HFSPLUS_FLG_APPEND)
268 inode->i_flags |= S_APPEND;
270 inode->i_flags &= ~S_APPEND;
273 static int hfsplus_file_open(struct inode *inode, struct file *file)
275 if (HFSPLUS_IS_RSRC(inode))
276 inode = HFSPLUS_I(inode)->rsrc_inode;
277 if (!(file->f_flags & O_LARGEFILE) && i_size_read(inode) > MAX_NON_LFS)
279 atomic_inc(&HFSPLUS_I(inode)->opencnt);
283 static int hfsplus_file_release(struct inode *inode, struct file *file)
285 struct super_block *sb = inode->i_sb;
287 if (HFSPLUS_IS_RSRC(inode))
288 inode = HFSPLUS_I(inode)->rsrc_inode;
289 if (atomic_dec_and_test(&HFSPLUS_I(inode)->opencnt)) {
290 mutex_lock(&inode->i_mutex);
291 hfsplus_file_truncate(inode);
292 if (inode->i_flags & S_DEAD) {
293 hfsplus_delete_cat(inode->i_ino,
294 HFSPLUS_SB(sb)->hidden_dir, NULL);
295 hfsplus_delete_inode(inode);
297 mutex_unlock(&inode->i_mutex);
302 static int hfsplus_setattr(struct dentry *dentry, struct iattr *attr)
304 struct inode *inode = dentry->d_inode;
307 error = inode_change_ok(inode, attr);
311 if ((attr->ia_valid & ATTR_SIZE) &&
312 attr->ia_size != i_size_read(inode)) {
313 inode_dio_wait(inode);
314 truncate_setsize(inode, attr->ia_size);
315 hfsplus_file_truncate(inode);
318 setattr_copy(inode, attr);
319 mark_inode_dirty(inode);
321 if (attr->ia_valid & ATTR_MODE) {
322 error = posix_acl_chmod(inode, inode->i_mode);
330 int hfsplus_file_fsync(struct file *file, loff_t start, loff_t end,
333 struct inode *inode = file->f_mapping->host;
334 struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
335 struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb);
336 int error = 0, error2;
338 error = filemap_write_and_wait_range(inode->i_mapping, start, end);
341 mutex_lock(&inode->i_mutex);
344 * Sync inode metadata into the catalog and extent trees.
346 sync_inode_metadata(inode, 1);
349 * And explicitly write out the btrees.
351 if (test_and_clear_bit(HFSPLUS_I_CAT_DIRTY, &hip->flags))
352 error = filemap_write_and_wait(sbi->cat_tree->inode->i_mapping);
354 if (test_and_clear_bit(HFSPLUS_I_EXT_DIRTY, &hip->flags)) {
356 filemap_write_and_wait(sbi->ext_tree->inode->i_mapping);
361 if (test_and_clear_bit(HFSPLUS_I_ATTR_DIRTY, &hip->flags)) {
362 if (sbi->attr_tree) {
364 filemap_write_and_wait(
365 sbi->attr_tree->inode->i_mapping);
369 pr_err("sync non-existent attributes tree\n");
373 if (test_and_clear_bit(HFSPLUS_I_ALLOC_DIRTY, &hip->flags)) {
374 error2 = filemap_write_and_wait(sbi->alloc_file->i_mapping);
379 if (!test_bit(HFSPLUS_SB_NOBARRIER, &sbi->flags))
380 blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL, NULL);
382 mutex_unlock(&inode->i_mutex);
387 static const struct inode_operations hfsplus_file_inode_operations = {
388 .lookup = hfsplus_file_lookup,
389 .setattr = hfsplus_setattr,
390 .setxattr = generic_setxattr,
391 .getxattr = generic_getxattr,
392 .listxattr = hfsplus_listxattr,
393 .removexattr = hfsplus_removexattr,
394 #ifdef CONFIG_HFSPLUS_FS_POSIX_ACL
395 .get_acl = hfsplus_get_posix_acl,
396 .set_acl = hfsplus_set_posix_acl,
400 static const struct file_operations hfsplus_file_operations = {
401 .llseek = generic_file_llseek,
402 .read = do_sync_read,
403 .aio_read = generic_file_aio_read,
404 .write = do_sync_write,
405 .aio_write = generic_file_aio_write,
406 .mmap = generic_file_mmap,
407 .splice_read = generic_file_splice_read,
408 .fsync = hfsplus_file_fsync,
409 .open = hfsplus_file_open,
410 .release = hfsplus_file_release,
411 .unlocked_ioctl = hfsplus_ioctl,
414 struct inode *hfsplus_new_inode(struct super_block *sb, umode_t mode)
416 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
417 struct inode *inode = new_inode(sb);
418 struct hfsplus_inode_info *hip;
423 inode->i_ino = sbi->next_cnid++;
424 inode->i_mode = mode;
425 inode->i_uid = current_fsuid();
426 inode->i_gid = current_fsgid();
428 inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME_SEC;
430 hip = HFSPLUS_I(inode);
431 INIT_LIST_HEAD(&hip->open_dir_list);
432 mutex_init(&hip->extents_lock);
433 atomic_set(&hip->opencnt, 0);
434 hip->extent_state = 0;
437 memset(hip->first_extents, 0, sizeof(hfsplus_extent_rec));
438 memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec));
439 hip->alloc_blocks = 0;
440 hip->first_blocks = 0;
441 hip->cached_start = 0;
442 hip->cached_blocks = 0;
445 hip->rsrc_inode = NULL;
446 if (S_ISDIR(inode->i_mode)) {
449 inode->i_op = &hfsplus_dir_inode_operations;
450 inode->i_fop = &hfsplus_dir_operations;
451 } else if (S_ISREG(inode->i_mode)) {
453 inode->i_op = &hfsplus_file_inode_operations;
454 inode->i_fop = &hfsplus_file_operations;
455 inode->i_mapping->a_ops = &hfsplus_aops;
456 hip->clump_blocks = sbi->data_clump_blocks;
457 } else if (S_ISLNK(inode->i_mode)) {
459 inode->i_op = &page_symlink_inode_operations;
460 inode->i_mapping->a_ops = &hfsplus_aops;
461 hip->clump_blocks = 1;
464 insert_inode_hash(inode);
465 mark_inode_dirty(inode);
466 hfsplus_mark_mdb_dirty(sb);
471 void hfsplus_delete_inode(struct inode *inode)
473 struct super_block *sb = inode->i_sb;
475 if (S_ISDIR(inode->i_mode)) {
476 HFSPLUS_SB(sb)->folder_count--;
477 hfsplus_mark_mdb_dirty(sb);
480 HFSPLUS_SB(sb)->file_count--;
481 if (S_ISREG(inode->i_mode)) {
482 if (!inode->i_nlink) {
484 hfsplus_file_truncate(inode);
486 } else if (S_ISLNK(inode->i_mode)) {
488 hfsplus_file_truncate(inode);
490 hfsplus_mark_mdb_dirty(sb);
493 void hfsplus_inode_read_fork(struct inode *inode, struct hfsplus_fork_raw *fork)
495 struct super_block *sb = inode->i_sb;
496 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
497 struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
501 memcpy(&hip->first_extents, &fork->extents, sizeof(hfsplus_extent_rec));
502 for (count = 0, i = 0; i < 8; i++)
503 count += be32_to_cpu(fork->extents[i].block_count);
504 hip->first_blocks = count;
505 memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec));
506 hip->cached_start = 0;
507 hip->cached_blocks = 0;
509 hip->alloc_blocks = be32_to_cpu(fork->total_blocks);
510 hip->phys_size = inode->i_size = be64_to_cpu(fork->total_size);
512 (inode->i_size + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
513 inode_set_bytes(inode, hip->fs_blocks << sb->s_blocksize_bits);
515 be32_to_cpu(fork->clump_size) >> sbi->alloc_blksz_shift;
516 if (!hip->clump_blocks) {
517 hip->clump_blocks = HFSPLUS_IS_RSRC(inode) ?
518 sbi->rsrc_clump_blocks :
519 sbi->data_clump_blocks;
523 void hfsplus_inode_write_fork(struct inode *inode,
524 struct hfsplus_fork_raw *fork)
526 memcpy(&fork->extents, &HFSPLUS_I(inode)->first_extents,
527 sizeof(hfsplus_extent_rec));
528 fork->total_size = cpu_to_be64(inode->i_size);
529 fork->total_blocks = cpu_to_be32(HFSPLUS_I(inode)->alloc_blocks);
532 int hfsplus_cat_read_inode(struct inode *inode, struct hfs_find_data *fd)
534 hfsplus_cat_entry entry;
538 type = hfs_bnode_read_u16(fd->bnode, fd->entryoffset);
540 HFSPLUS_I(inode)->linkid = 0;
541 if (type == HFSPLUS_FOLDER) {
542 struct hfsplus_cat_folder *folder = &entry.folder;
544 if (fd->entrylength < sizeof(struct hfsplus_cat_folder))
546 hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
547 sizeof(struct hfsplus_cat_folder));
548 hfsplus_get_perms(inode, &folder->permissions, 1);
550 inode->i_size = 2 + be32_to_cpu(folder->valence);
551 inode->i_atime = hfsp_mt2ut(folder->access_date);
552 inode->i_mtime = hfsp_mt2ut(folder->content_mod_date);
553 inode->i_ctime = hfsp_mt2ut(folder->attribute_mod_date);
554 HFSPLUS_I(inode)->create_date = folder->create_date;
555 HFSPLUS_I(inode)->fs_blocks = 0;
556 inode->i_op = &hfsplus_dir_inode_operations;
557 inode->i_fop = &hfsplus_dir_operations;
558 } else if (type == HFSPLUS_FILE) {
559 struct hfsplus_cat_file *file = &entry.file;
561 if (fd->entrylength < sizeof(struct hfsplus_cat_file))
563 hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
564 sizeof(struct hfsplus_cat_file));
566 hfsplus_inode_read_fork(inode, HFSPLUS_IS_RSRC(inode) ?
567 &file->rsrc_fork : &file->data_fork);
568 hfsplus_get_perms(inode, &file->permissions, 0);
570 if (S_ISREG(inode->i_mode)) {
571 if (file->permissions.dev)
573 be32_to_cpu(file->permissions.dev));
574 inode->i_op = &hfsplus_file_inode_operations;
575 inode->i_fop = &hfsplus_file_operations;
576 inode->i_mapping->a_ops = &hfsplus_aops;
577 } else if (S_ISLNK(inode->i_mode)) {
578 inode->i_op = &page_symlink_inode_operations;
579 inode->i_mapping->a_ops = &hfsplus_aops;
581 init_special_inode(inode, inode->i_mode,
582 be32_to_cpu(file->permissions.dev));
584 inode->i_atime = hfsp_mt2ut(file->access_date);
585 inode->i_mtime = hfsp_mt2ut(file->content_mod_date);
586 inode->i_ctime = hfsp_mt2ut(file->attribute_mod_date);
587 HFSPLUS_I(inode)->create_date = file->create_date;
589 pr_err("bad catalog entry used to create inode\n");
595 int hfsplus_cat_write_inode(struct inode *inode)
597 struct inode *main_inode = inode;
598 struct hfs_find_data fd;
599 hfsplus_cat_entry entry;
601 if (HFSPLUS_IS_RSRC(inode))
602 main_inode = HFSPLUS_I(inode)->rsrc_inode;
604 if (!main_inode->i_nlink)
607 if (hfs_find_init(HFSPLUS_SB(main_inode->i_sb)->cat_tree, &fd))
611 if (hfsplus_find_cat(main_inode->i_sb, main_inode->i_ino, &fd))
615 if (S_ISDIR(main_inode->i_mode)) {
616 struct hfsplus_cat_folder *folder = &entry.folder;
618 if (fd.entrylength < sizeof(struct hfsplus_cat_folder))
620 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
621 sizeof(struct hfsplus_cat_folder));
622 /* simple node checks? */
623 hfsplus_cat_set_perms(inode, &folder->permissions);
624 folder->access_date = hfsp_ut2mt(inode->i_atime);
625 folder->content_mod_date = hfsp_ut2mt(inode->i_mtime);
626 folder->attribute_mod_date = hfsp_ut2mt(inode->i_ctime);
627 folder->valence = cpu_to_be32(inode->i_size - 2);
628 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
629 sizeof(struct hfsplus_cat_folder));
630 } else if (HFSPLUS_IS_RSRC(inode)) {
631 struct hfsplus_cat_file *file = &entry.file;
632 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
633 sizeof(struct hfsplus_cat_file));
634 hfsplus_inode_write_fork(inode, &file->rsrc_fork);
635 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
636 sizeof(struct hfsplus_cat_file));
638 struct hfsplus_cat_file *file = &entry.file;
640 if (fd.entrylength < sizeof(struct hfsplus_cat_file))
642 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
643 sizeof(struct hfsplus_cat_file));
644 hfsplus_inode_write_fork(inode, &file->data_fork);
645 hfsplus_cat_set_perms(inode, &file->permissions);
646 if (HFSPLUS_FLG_IMMUTABLE &
647 (file->permissions.rootflags |
648 file->permissions.userflags))
649 file->flags |= cpu_to_be16(HFSPLUS_FILE_LOCKED);
651 file->flags &= cpu_to_be16(~HFSPLUS_FILE_LOCKED);
652 file->access_date = hfsp_ut2mt(inode->i_atime);
653 file->content_mod_date = hfsp_ut2mt(inode->i_mtime);
654 file->attribute_mod_date = hfsp_ut2mt(inode->i_ctime);
655 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
656 sizeof(struct hfsplus_cat_file));
659 set_bit(HFSPLUS_I_CAT_DIRTY, &HFSPLUS_I(inode)->flags);