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>
18 #include "hfsplus_fs.h"
19 #include "hfsplus_raw.h"
21 static int hfsplus_readpage(struct file *file, struct page *page)
23 return block_read_full_page(page, hfsplus_get_block);
26 static int hfsplus_writepage(struct page *page, struct writeback_control *wbc)
28 return block_write_full_page(page, hfsplus_get_block, wbc);
31 static int hfsplus_write_begin(struct file *file, struct address_space *mapping,
32 loff_t pos, unsigned len, unsigned flags,
33 struct page **pagep, void **fsdata)
38 ret = cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
40 &HFSPLUS_I(mapping->host)->phys_size);
42 loff_t isize = mapping->host->i_size;
43 if (pos + len > isize)
44 vmtruncate(mapping->host, isize);
50 static sector_t hfsplus_bmap(struct address_space *mapping, sector_t block)
52 return generic_block_bmap(mapping, block, hfsplus_get_block);
55 static int hfsplus_releasepage(struct page *page, gfp_t mask)
57 struct inode *inode = page->mapping->host;
58 struct super_block *sb = inode->i_sb;
59 struct hfs_btree *tree;
60 struct hfs_bnode *node;
64 switch (inode->i_ino) {
65 case HFSPLUS_EXT_CNID:
66 tree = HFSPLUS_SB(sb)->ext_tree;
68 case HFSPLUS_CAT_CNID:
69 tree = HFSPLUS_SB(sb)->cat_tree;
71 case HFSPLUS_ATTR_CNID:
72 tree = HFSPLUS_SB(sb)->attr_tree;
80 if (tree->node_size >= PAGE_CACHE_SIZE) {
82 (tree->node_size_shift - PAGE_CACHE_SHIFT);
83 spin_lock(&tree->hash_lock);
84 node = hfs_bnode_findhash(tree, nidx);
87 else if (atomic_read(&node->refcnt))
90 hfs_bnode_unhash(node);
93 spin_unlock(&tree->hash_lock);
96 (PAGE_CACHE_SHIFT - tree->node_size_shift);
97 i = 1 << (PAGE_CACHE_SHIFT - tree->node_size_shift);
98 spin_lock(&tree->hash_lock);
100 node = hfs_bnode_findhash(tree, nidx++);
103 if (atomic_read(&node->refcnt)) {
107 hfs_bnode_unhash(node);
108 hfs_bnode_free(node);
109 } while (--i && nidx < tree->node_count);
110 spin_unlock(&tree->hash_lock);
112 return res ? try_to_free_buffers(page) : 0;
115 static ssize_t hfsplus_direct_IO(int rw, struct kiocb *iocb,
116 const struct iovec *iov, loff_t offset, unsigned long nr_segs)
118 struct file *file = iocb->ki_filp;
119 struct inode *inode = file->f_path.dentry->d_inode->i_mapping->host;
122 ret = blockdev_direct_IO(rw, iocb, inode, iov, offset, nr_segs,
126 * In case of error extending write may have instantiated a few
127 * blocks outside i_size. Trim these off again.
129 if (unlikely((rw & WRITE) && ret < 0)) {
130 loff_t isize = i_size_read(inode);
131 loff_t end = offset + iov_length(iov, nr_segs);
134 vmtruncate(inode, isize);
140 static int hfsplus_writepages(struct address_space *mapping,
141 struct writeback_control *wbc)
143 return mpage_writepages(mapping, wbc, hfsplus_get_block);
146 const struct address_space_operations hfsplus_btree_aops = {
147 .readpage = hfsplus_readpage,
148 .writepage = hfsplus_writepage,
149 .write_begin = hfsplus_write_begin,
150 .write_end = generic_write_end,
151 .bmap = hfsplus_bmap,
152 .releasepage = hfsplus_releasepage,
155 const struct address_space_operations hfsplus_aops = {
156 .readpage = hfsplus_readpage,
157 .writepage = hfsplus_writepage,
158 .write_begin = hfsplus_write_begin,
159 .write_end = generic_write_end,
160 .bmap = hfsplus_bmap,
161 .direct_IO = hfsplus_direct_IO,
162 .writepages = hfsplus_writepages,
165 const struct dentry_operations hfsplus_dentry_operations = {
166 .d_hash = hfsplus_hash_dentry,
167 .d_compare = hfsplus_compare_dentry,
170 static struct dentry *hfsplus_file_lookup(struct inode *dir,
171 struct dentry *dentry, struct nameidata *nd)
173 struct hfs_find_data fd;
174 struct super_block *sb = dir->i_sb;
175 struct inode *inode = NULL;
176 struct hfsplus_inode_info *hip;
179 if (HFSPLUS_IS_RSRC(dir) || strcmp(dentry->d_name.name, "rsrc"))
182 inode = HFSPLUS_I(dir)->rsrc_inode;
186 inode = new_inode(sb);
188 return ERR_PTR(-ENOMEM);
190 hip = HFSPLUS_I(inode);
191 inode->i_ino = dir->i_ino;
192 INIT_LIST_HEAD(&hip->open_dir_list);
193 mutex_init(&hip->extents_lock);
194 hip->extent_state = 0;
196 set_bit(HFSPLUS_I_RSRC, &hip->flags);
198 hfs_find_init(HFSPLUS_SB(sb)->cat_tree, &fd);
199 err = hfsplus_find_cat(sb, dir->i_ino, &fd);
201 err = hfsplus_cat_read_inode(inode, &fd);
207 hip->rsrc_inode = dir;
208 HFSPLUS_I(dir)->rsrc_inode = inode;
212 * __mark_inode_dirty expects inodes to be hashed. Since we don't
213 * want resource fork inodes in the regular inode space, we make them
214 * appear hashed, but do not put on any lists. hlist_del()
215 * will work fine and require no locking.
217 hlist_add_fake(&inode->i_hash);
219 mark_inode_dirty(inode);
221 d_add(dentry, inode);
225 static void hfsplus_get_perms(struct inode *inode,
226 struct hfsplus_perm *perms, int dir)
228 struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb);
231 mode = be16_to_cpu(perms->mode);
233 inode->i_uid = be32_to_cpu(perms->owner);
234 if (!inode->i_uid && !mode)
235 inode->i_uid = sbi->uid;
237 inode->i_gid = be32_to_cpu(perms->group);
238 if (!inode->i_gid && !mode)
239 inode->i_gid = sbi->gid;
242 mode = mode ? (mode & S_IALLUGO) : (S_IRWXUGO & ~(sbi->umask));
245 mode = S_IFREG | ((S_IRUGO|S_IWUGO) & ~(sbi->umask));
246 inode->i_mode = mode;
248 HFSPLUS_I(inode)->userflags = perms->userflags;
249 if (perms->rootflags & HFSPLUS_FLG_IMMUTABLE)
250 inode->i_flags |= S_IMMUTABLE;
252 inode->i_flags &= ~S_IMMUTABLE;
253 if (perms->rootflags & HFSPLUS_FLG_APPEND)
254 inode->i_flags |= S_APPEND;
256 inode->i_flags &= ~S_APPEND;
259 static int hfsplus_file_open(struct inode *inode, struct file *file)
261 if (HFSPLUS_IS_RSRC(inode))
262 inode = HFSPLUS_I(inode)->rsrc_inode;
263 if (!(file->f_flags & O_LARGEFILE) && i_size_read(inode) > MAX_NON_LFS)
265 atomic_inc(&HFSPLUS_I(inode)->opencnt);
269 static int hfsplus_file_release(struct inode *inode, struct file *file)
271 struct super_block *sb = inode->i_sb;
273 if (HFSPLUS_IS_RSRC(inode))
274 inode = HFSPLUS_I(inode)->rsrc_inode;
275 if (atomic_dec_and_test(&HFSPLUS_I(inode)->opencnt)) {
276 mutex_lock(&inode->i_mutex);
277 hfsplus_file_truncate(inode);
278 if (inode->i_flags & S_DEAD) {
279 hfsplus_delete_cat(inode->i_ino,
280 HFSPLUS_SB(sb)->hidden_dir, NULL);
281 hfsplus_delete_inode(inode);
283 mutex_unlock(&inode->i_mutex);
288 static int hfsplus_setattr(struct dentry *dentry, struct iattr *attr)
290 struct inode *inode = dentry->d_inode;
293 error = inode_change_ok(inode, attr);
297 if ((attr->ia_valid & ATTR_SIZE) &&
298 attr->ia_size != i_size_read(inode)) {
299 inode_dio_wait(inode);
301 error = vmtruncate(inode, attr->ia_size);
306 setattr_copy(inode, attr);
307 mark_inode_dirty(inode);
311 int hfsplus_file_fsync(struct file *file, loff_t start, loff_t end,
314 struct inode *inode = file->f_mapping->host;
315 struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
316 struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb);
317 int error = 0, error2;
319 error = filemap_write_and_wait_range(inode->i_mapping, start, end);
322 mutex_lock(&inode->i_mutex);
325 * Sync inode metadata into the catalog and extent trees.
327 sync_inode_metadata(inode, 1);
330 * And explicitly write out the btrees.
332 if (test_and_clear_bit(HFSPLUS_I_CAT_DIRTY, &hip->flags))
333 error = filemap_write_and_wait(sbi->cat_tree->inode->i_mapping);
335 if (test_and_clear_bit(HFSPLUS_I_EXT_DIRTY, &hip->flags)) {
337 filemap_write_and_wait(sbi->ext_tree->inode->i_mapping);
342 if (test_and_clear_bit(HFSPLUS_I_ALLOC_DIRTY, &hip->flags)) {
343 error2 = filemap_write_and_wait(sbi->alloc_file->i_mapping);
348 if (!test_bit(HFSPLUS_SB_NOBARRIER, &sbi->flags))
349 blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL, NULL);
351 mutex_unlock(&inode->i_mutex);
356 static const struct inode_operations hfsplus_file_inode_operations = {
357 .lookup = hfsplus_file_lookup,
358 .truncate = hfsplus_file_truncate,
359 .setattr = hfsplus_setattr,
360 .setxattr = hfsplus_setxattr,
361 .getxattr = hfsplus_getxattr,
362 .listxattr = hfsplus_listxattr,
365 static const struct file_operations hfsplus_file_operations = {
366 .llseek = generic_file_llseek,
367 .read = do_sync_read,
368 .aio_read = generic_file_aio_read,
369 .write = do_sync_write,
370 .aio_write = generic_file_aio_write,
371 .mmap = generic_file_mmap,
372 .splice_read = generic_file_splice_read,
373 .fsync = hfsplus_file_fsync,
374 .open = hfsplus_file_open,
375 .release = hfsplus_file_release,
376 .unlocked_ioctl = hfsplus_ioctl,
379 struct inode *hfsplus_new_inode(struct super_block *sb, int mode)
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->i_mode = mode;
390 inode->i_uid = current_fsuid();
391 inode->i_gid = current_fsgid();
393 inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME_SEC;
395 hip = HFSPLUS_I(inode);
396 INIT_LIST_HEAD(&hip->open_dir_list);
397 mutex_init(&hip->extents_lock);
398 atomic_set(&hip->opencnt, 0);
399 hip->extent_state = 0;
401 memset(hip->first_extents, 0, sizeof(hfsplus_extent_rec));
402 memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec));
403 hip->alloc_blocks = 0;
404 hip->first_blocks = 0;
405 hip->cached_start = 0;
406 hip->cached_blocks = 0;
409 hip->rsrc_inode = NULL;
410 if (S_ISDIR(inode->i_mode)) {
413 inode->i_op = &hfsplus_dir_inode_operations;
414 inode->i_fop = &hfsplus_dir_operations;
415 } else if (S_ISREG(inode->i_mode)) {
417 inode->i_op = &hfsplus_file_inode_operations;
418 inode->i_fop = &hfsplus_file_operations;
419 inode->i_mapping->a_ops = &hfsplus_aops;
420 hip->clump_blocks = sbi->data_clump_blocks;
421 } else if (S_ISLNK(inode->i_mode)) {
423 inode->i_op = &page_symlink_inode_operations;
424 inode->i_mapping->a_ops = &hfsplus_aops;
425 hip->clump_blocks = 1;
428 insert_inode_hash(inode);
429 mark_inode_dirty(inode);
435 void hfsplus_delete_inode(struct inode *inode)
437 struct super_block *sb = inode->i_sb;
439 if (S_ISDIR(inode->i_mode)) {
440 HFSPLUS_SB(sb)->folder_count--;
444 HFSPLUS_SB(sb)->file_count--;
445 if (S_ISREG(inode->i_mode)) {
446 if (!inode->i_nlink) {
448 hfsplus_file_truncate(inode);
450 } else if (S_ISLNK(inode->i_mode)) {
452 hfsplus_file_truncate(inode);
457 void hfsplus_inode_read_fork(struct inode *inode, struct hfsplus_fork_raw *fork)
459 struct super_block *sb = inode->i_sb;
460 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
461 struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
465 memcpy(&hip->first_extents, &fork->extents, sizeof(hfsplus_extent_rec));
466 for (count = 0, i = 0; i < 8; i++)
467 count += be32_to_cpu(fork->extents[i].block_count);
468 hip->first_blocks = count;
469 memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec));
470 hip->cached_start = 0;
471 hip->cached_blocks = 0;
473 hip->alloc_blocks = be32_to_cpu(fork->total_blocks);
474 hip->phys_size = inode->i_size = be64_to_cpu(fork->total_size);
476 (inode->i_size + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
477 inode_set_bytes(inode, hip->fs_blocks << sb->s_blocksize_bits);
479 be32_to_cpu(fork->clump_size) >> sbi->alloc_blksz_shift;
480 if (!hip->clump_blocks) {
481 hip->clump_blocks = HFSPLUS_IS_RSRC(inode) ?
482 sbi->rsrc_clump_blocks :
483 sbi->data_clump_blocks;
487 void hfsplus_inode_write_fork(struct inode *inode,
488 struct hfsplus_fork_raw *fork)
490 memcpy(&fork->extents, &HFSPLUS_I(inode)->first_extents,
491 sizeof(hfsplus_extent_rec));
492 fork->total_size = cpu_to_be64(inode->i_size);
493 fork->total_blocks = cpu_to_be32(HFSPLUS_I(inode)->alloc_blocks);
496 int hfsplus_cat_read_inode(struct inode *inode, struct hfs_find_data *fd)
498 hfsplus_cat_entry entry;
502 type = hfs_bnode_read_u16(fd->bnode, fd->entryoffset);
504 HFSPLUS_I(inode)->linkid = 0;
505 if (type == HFSPLUS_FOLDER) {
506 struct hfsplus_cat_folder *folder = &entry.folder;
508 if (fd->entrylength < sizeof(struct hfsplus_cat_folder))
510 hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
511 sizeof(struct hfsplus_cat_folder));
512 hfsplus_get_perms(inode, &folder->permissions, 1);
514 inode->i_size = 2 + be32_to_cpu(folder->valence);
515 inode->i_atime = hfsp_mt2ut(folder->access_date);
516 inode->i_mtime = hfsp_mt2ut(folder->content_mod_date);
517 inode->i_ctime = hfsp_mt2ut(folder->attribute_mod_date);
518 HFSPLUS_I(inode)->create_date = folder->create_date;
519 HFSPLUS_I(inode)->fs_blocks = 0;
520 inode->i_op = &hfsplus_dir_inode_operations;
521 inode->i_fop = &hfsplus_dir_operations;
522 } else if (type == HFSPLUS_FILE) {
523 struct hfsplus_cat_file *file = &entry.file;
525 if (fd->entrylength < sizeof(struct hfsplus_cat_file))
527 hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
528 sizeof(struct hfsplus_cat_file));
530 hfsplus_inode_read_fork(inode, HFSPLUS_IS_RSRC(inode) ?
531 &file->rsrc_fork : &file->data_fork);
532 hfsplus_get_perms(inode, &file->permissions, 0);
534 if (S_ISREG(inode->i_mode)) {
535 if (file->permissions.dev)
537 be32_to_cpu(file->permissions.dev);
538 inode->i_op = &hfsplus_file_inode_operations;
539 inode->i_fop = &hfsplus_file_operations;
540 inode->i_mapping->a_ops = &hfsplus_aops;
541 } else if (S_ISLNK(inode->i_mode)) {
542 inode->i_op = &page_symlink_inode_operations;
543 inode->i_mapping->a_ops = &hfsplus_aops;
545 init_special_inode(inode, inode->i_mode,
546 be32_to_cpu(file->permissions.dev));
548 inode->i_atime = hfsp_mt2ut(file->access_date);
549 inode->i_mtime = hfsp_mt2ut(file->content_mod_date);
550 inode->i_ctime = hfsp_mt2ut(file->attribute_mod_date);
551 HFSPLUS_I(inode)->create_date = file->create_date;
553 printk(KERN_ERR "hfs: bad catalog entry used to create inode\n");
559 int hfsplus_cat_write_inode(struct inode *inode)
561 struct inode *main_inode = inode;
562 struct hfs_find_data fd;
563 hfsplus_cat_entry entry;
565 if (HFSPLUS_IS_RSRC(inode))
566 main_inode = HFSPLUS_I(inode)->rsrc_inode;
568 if (!main_inode->i_nlink)
571 if (hfs_find_init(HFSPLUS_SB(main_inode->i_sb)->cat_tree, &fd))
575 if (hfsplus_find_cat(main_inode->i_sb, main_inode->i_ino, &fd))
579 if (S_ISDIR(main_inode->i_mode)) {
580 struct hfsplus_cat_folder *folder = &entry.folder;
582 if (fd.entrylength < sizeof(struct hfsplus_cat_folder))
584 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
585 sizeof(struct hfsplus_cat_folder));
586 /* simple node checks? */
587 hfsplus_cat_set_perms(inode, &folder->permissions);
588 folder->access_date = hfsp_ut2mt(inode->i_atime);
589 folder->content_mod_date = hfsp_ut2mt(inode->i_mtime);
590 folder->attribute_mod_date = hfsp_ut2mt(inode->i_ctime);
591 folder->valence = cpu_to_be32(inode->i_size - 2);
592 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
593 sizeof(struct hfsplus_cat_folder));
594 } else if (HFSPLUS_IS_RSRC(inode)) {
595 struct hfsplus_cat_file *file = &entry.file;
596 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
597 sizeof(struct hfsplus_cat_file));
598 hfsplus_inode_write_fork(inode, &file->rsrc_fork);
599 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
600 sizeof(struct hfsplus_cat_file));
602 struct hfsplus_cat_file *file = &entry.file;
604 if (fd.entrylength < sizeof(struct hfsplus_cat_file))
606 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
607 sizeof(struct hfsplus_cat_file));
608 hfsplus_inode_write_fork(inode, &file->data_fork);
609 hfsplus_cat_set_perms(inode, &file->permissions);
610 if (HFSPLUS_FLG_IMMUTABLE &
611 (file->permissions.rootflags |
612 file->permissions.userflags))
613 file->flags |= cpu_to_be16(HFSPLUS_FILE_LOCKED);
615 file->flags &= cpu_to_be16(~HFSPLUS_FILE_LOCKED);
616 file->access_date = hfsp_ut2mt(inode->i_atime);
617 file->content_mod_date = hfsp_ut2mt(inode->i_mtime);
618 file->attribute_mod_date = hfsp_ut2mt(inode->i_ctime);
619 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
620 sizeof(struct hfsplus_cat_file));
623 set_bit(HFSPLUS_I_CAT_DIRTY, &HFSPLUS_I(inode)->flags);