2 * linux/fs/hfsplus/inode.c
5 * Brad Boyer (flar@allandria.com)
6 * (C) 2003 Ardis Technologies <roman@ardistech.com>
8 * Inode handling routines
13 #include <linux/pagemap.h>
14 #include <linux/mpage.h>
15 #include <linux/sched.h>
17 #include "hfsplus_fs.h"
18 #include "hfsplus_raw.h"
20 static int hfsplus_readpage(struct file *file, struct page *page)
22 return block_read_full_page(page, hfsplus_get_block);
25 static int hfsplus_writepage(struct page *page, struct writeback_control *wbc)
27 return block_write_full_page(page, hfsplus_get_block, wbc);
30 static int hfsplus_write_begin(struct file *file, struct address_space *mapping,
31 loff_t pos, unsigned len, unsigned flags,
32 struct page **pagep, void **fsdata)
37 ret = cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
39 &HFSPLUS_I(mapping->host)->phys_size);
41 loff_t isize = mapping->host->i_size;
42 if (pos + len > isize)
43 vmtruncate(mapping->host, isize);
49 static sector_t hfsplus_bmap(struct address_space *mapping, sector_t block)
51 return generic_block_bmap(mapping, block, hfsplus_get_block);
54 static int hfsplus_releasepage(struct page *page, gfp_t mask)
56 struct inode *inode = page->mapping->host;
57 struct super_block *sb = inode->i_sb;
58 struct hfs_btree *tree;
59 struct hfs_bnode *node;
63 switch (inode->i_ino) {
64 case HFSPLUS_EXT_CNID:
65 tree = HFSPLUS_SB(sb)->ext_tree;
67 case HFSPLUS_CAT_CNID:
68 tree = HFSPLUS_SB(sb)->cat_tree;
70 case HFSPLUS_ATTR_CNID:
71 tree = HFSPLUS_SB(sb)->attr_tree;
79 if (tree->node_size >= PAGE_CACHE_SIZE) {
80 nidx = page->index >> (tree->node_size_shift - PAGE_CACHE_SHIFT);
81 spin_lock(&tree->hash_lock);
82 node = hfs_bnode_findhash(tree, nidx);
85 else if (atomic_read(&node->refcnt))
88 hfs_bnode_unhash(node);
91 spin_unlock(&tree->hash_lock);
93 nidx = page->index << (PAGE_CACHE_SHIFT - tree->node_size_shift);
94 i = 1 << (PAGE_CACHE_SHIFT - tree->node_size_shift);
95 spin_lock(&tree->hash_lock);
97 node = hfs_bnode_findhash(tree, nidx++);
100 if (atomic_read(&node->refcnt)) {
104 hfs_bnode_unhash(node);
105 hfs_bnode_free(node);
106 } while (--i && nidx < tree->node_count);
107 spin_unlock(&tree->hash_lock);
109 return res ? try_to_free_buffers(page) : 0;
112 static ssize_t hfsplus_direct_IO(int rw, struct kiocb *iocb,
113 const struct iovec *iov, loff_t offset, unsigned long nr_segs)
115 struct file *file = iocb->ki_filp;
116 struct inode *inode = file->f_path.dentry->d_inode->i_mapping->host;
119 ret = blockdev_direct_IO(rw, iocb, inode, inode->i_sb->s_bdev, iov,
120 offset, nr_segs, hfsplus_get_block, NULL);
123 * In case of error extending write may have instantiated a few
124 * blocks outside i_size. Trim these off again.
126 if (unlikely((rw & WRITE) && ret < 0)) {
127 loff_t isize = i_size_read(inode);
128 loff_t end = offset + iov_length(iov, nr_segs);
131 vmtruncate(inode, isize);
137 static int hfsplus_writepages(struct address_space *mapping,
138 struct writeback_control *wbc)
140 return mpage_writepages(mapping, wbc, hfsplus_get_block);
143 const struct address_space_operations hfsplus_btree_aops = {
144 .readpage = hfsplus_readpage,
145 .writepage = hfsplus_writepage,
146 .sync_page = block_sync_page,
147 .write_begin = hfsplus_write_begin,
148 .write_end = generic_write_end,
149 .bmap = hfsplus_bmap,
150 .releasepage = hfsplus_releasepage,
153 const struct address_space_operations hfsplus_aops = {
154 .readpage = hfsplus_readpage,
155 .writepage = hfsplus_writepage,
156 .sync_page = block_sync_page,
157 .write_begin = hfsplus_write_begin,
158 .write_end = generic_write_end,
159 .bmap = hfsplus_bmap,
160 .direct_IO = hfsplus_direct_IO,
161 .writepages = hfsplus_writepages,
164 const struct dentry_operations hfsplus_dentry_operations = {
165 .d_hash = hfsplus_hash_dentry,
166 .d_compare = hfsplus_compare_dentry,
169 static struct dentry *hfsplus_file_lookup(struct inode *dir, struct dentry *dentry,
170 struct nameidata *nd)
172 struct hfs_find_data fd;
173 struct super_block *sb = dir->i_sb;
174 struct inode *inode = NULL;
175 struct hfsplus_inode_info *hip;
178 if (HFSPLUS_IS_RSRC(dir) || strcmp(dentry->d_name.name, "rsrc"))
181 inode = HFSPLUS_I(dir)->rsrc_inode;
185 inode = new_inode(sb);
187 return ERR_PTR(-ENOMEM);
189 hip = HFSPLUS_I(inode);
190 inode->i_ino = dir->i_ino;
191 INIT_LIST_HEAD(&hip->open_dir_list);
192 mutex_init(&hip->extents_lock);
193 hip->flags = HFSPLUS_FLG_RSRC;
195 hfs_find_init(HFSPLUS_SB(sb)->cat_tree, &fd);
196 err = hfsplus_find_cat(sb, dir->i_ino, &fd);
198 err = hfsplus_cat_read_inode(inode, &fd);
204 hip->rsrc_inode = dir;
205 HFSPLUS_I(dir)->rsrc_inode = inode;
209 * __mark_inode_dirty expects inodes to be hashed. Since we don't
210 * want resource fork inodes in the regular inode space, we make them
211 * appear hashed, but do not put on any lists. hlist_del()
212 * will work fine and require no locking.
214 inode->i_hash.pprev = &inode->i_hash.next;
216 mark_inode_dirty(inode);
218 d_add(dentry, inode);
222 static void hfsplus_get_perms(struct inode *inode, struct hfsplus_perm *perms, int dir)
224 struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb);
227 mode = be16_to_cpu(perms->mode);
229 inode->i_uid = be32_to_cpu(perms->owner);
230 if (!inode->i_uid && !mode)
231 inode->i_uid = sbi->uid;
233 inode->i_gid = be32_to_cpu(perms->group);
234 if (!inode->i_gid && !mode)
235 inode->i_gid = sbi->gid;
238 mode = mode ? (mode & S_IALLUGO) : (S_IRWXUGO & ~(sbi->umask));
241 mode = S_IFREG | ((S_IRUGO|S_IWUGO) & ~(sbi->umask));
242 inode->i_mode = mode;
244 HFSPLUS_I(inode)->rootflags = perms->rootflags;
245 HFSPLUS_I(inode)->userflags = perms->userflags;
246 if (perms->rootflags & HFSPLUS_FLG_IMMUTABLE)
247 inode->i_flags |= S_IMMUTABLE;
249 inode->i_flags &= ~S_IMMUTABLE;
250 if (perms->rootflags & HFSPLUS_FLG_APPEND)
251 inode->i_flags |= S_APPEND;
253 inode->i_flags &= ~S_APPEND;
256 static void hfsplus_set_perms(struct inode *inode, struct hfsplus_perm *perms)
258 if (inode->i_flags & S_IMMUTABLE)
259 perms->rootflags |= HFSPLUS_FLG_IMMUTABLE;
261 perms->rootflags &= ~HFSPLUS_FLG_IMMUTABLE;
262 if (inode->i_flags & S_APPEND)
263 perms->rootflags |= HFSPLUS_FLG_APPEND;
265 perms->rootflags &= ~HFSPLUS_FLG_APPEND;
266 perms->userflags = HFSPLUS_I(inode)->userflags;
267 perms->mode = cpu_to_be16(inode->i_mode);
268 perms->owner = cpu_to_be32(inode->i_uid);
269 perms->group = cpu_to_be32(inode->i_gid);
271 if (S_ISREG(inode->i_mode))
272 perms->dev = cpu_to_be32(inode->i_nlink);
273 else if (S_ISBLK(inode->i_mode) || S_ISCHR(inode->i_mode))
274 perms->dev = cpu_to_be32(inode->i_rdev);
279 static int hfsplus_file_open(struct inode *inode, struct file *file)
281 if (HFSPLUS_IS_RSRC(inode))
282 inode = HFSPLUS_I(inode)->rsrc_inode;
283 if (!(file->f_flags & O_LARGEFILE) && i_size_read(inode) > MAX_NON_LFS)
285 atomic_inc(&HFSPLUS_I(inode)->opencnt);
289 static int hfsplus_file_release(struct inode *inode, struct file *file)
291 struct super_block *sb = inode->i_sb;
293 if (HFSPLUS_IS_RSRC(inode))
294 inode = HFSPLUS_I(inode)->rsrc_inode;
295 if (atomic_dec_and_test(&HFSPLUS_I(inode)->opencnt)) {
296 mutex_lock(&inode->i_mutex);
297 hfsplus_file_truncate(inode);
298 if (inode->i_flags & S_DEAD) {
299 hfsplus_delete_cat(inode->i_ino,
300 HFSPLUS_SB(sb)->hidden_dir, NULL);
301 hfsplus_delete_inode(inode);
303 mutex_unlock(&inode->i_mutex);
308 static int hfsplus_setattr(struct dentry *dentry, struct iattr *attr)
310 struct inode *inode = dentry->d_inode;
313 error = inode_change_ok(inode, attr);
317 if ((attr->ia_valid & ATTR_SIZE) &&
318 attr->ia_size != i_size_read(inode)) {
319 error = vmtruncate(inode, attr->ia_size);
324 setattr_copy(inode, attr);
325 mark_inode_dirty(inode);
329 static int hfsplus_file_fsync(struct file *filp, int datasync)
331 struct inode *inode = filp->f_mapping->host;
332 struct super_block * sb;
335 /* sync the inode to buffers */
336 ret = write_inode_now(inode, 0);
338 /* sync the superblock to buffers */
341 if (!(sb->s_flags & MS_RDONLY))
342 hfsplus_sync_fs(sb, 1);
347 /* .. finally sync the buffers to disk */
348 err = sync_blockdev(sb->s_bdev);
354 static const struct inode_operations hfsplus_file_inode_operations = {
355 .lookup = hfsplus_file_lookup,
356 .truncate = hfsplus_file_truncate,
357 .setattr = hfsplus_setattr,
358 .setxattr = hfsplus_setxattr,
359 .getxattr = hfsplus_getxattr,
360 .listxattr = hfsplus_listxattr,
363 static const struct file_operations hfsplus_file_operations = {
364 .llseek = generic_file_llseek,
365 .read = do_sync_read,
366 .aio_read = generic_file_aio_read,
367 .write = do_sync_write,
368 .aio_write = generic_file_aio_write,
369 .mmap = generic_file_mmap,
370 .splice_read = generic_file_splice_read,
371 .fsync = hfsplus_file_fsync,
372 .open = hfsplus_file_open,
373 .release = hfsplus_file_release,
374 .unlocked_ioctl = hfsplus_ioctl,
377 struct inode *hfsplus_new_inode(struct super_block *sb, int mode)
379 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
380 struct inode *inode = new_inode(sb);
381 struct hfsplus_inode_info *hip;
386 inode->i_ino = sbi->next_cnid++;
387 inode->i_mode = mode;
388 inode->i_uid = current_fsuid();
389 inode->i_gid = current_fsgid();
391 inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME_SEC;
393 hip = HFSPLUS_I(inode);
394 INIT_LIST_HEAD(&hip->open_dir_list);
395 mutex_init(&hip->extents_lock);
396 atomic_set(&hip->opencnt, 0);
398 memset(hip->first_extents, 0, sizeof(hfsplus_extent_rec));
399 memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec));
400 hip->alloc_blocks = 0;
401 hip->first_blocks = 0;
402 hip->cached_start = 0;
403 hip->cached_blocks = 0;
406 hip->rsrc_inode = NULL;
407 if (S_ISDIR(inode->i_mode)) {
410 inode->i_op = &hfsplus_dir_inode_operations;
411 inode->i_fop = &hfsplus_dir_operations;
412 } else if (S_ISREG(inode->i_mode)) {
414 inode->i_op = &hfsplus_file_inode_operations;
415 inode->i_fop = &hfsplus_file_operations;
416 inode->i_mapping->a_ops = &hfsplus_aops;
417 hip->clump_blocks = sbi->data_clump_blocks;
418 } else if (S_ISLNK(inode->i_mode)) {
420 inode->i_op = &page_symlink_inode_operations;
421 inode->i_mapping->a_ops = &hfsplus_aops;
422 hip->clump_blocks = 1;
425 insert_inode_hash(inode);
426 mark_inode_dirty(inode);
432 void hfsplus_delete_inode(struct inode *inode)
434 struct super_block *sb = inode->i_sb;
436 if (S_ISDIR(inode->i_mode)) {
437 HFSPLUS_SB(sb)->folder_count--;
441 HFSPLUS_SB(sb)->file_count--;
442 if (S_ISREG(inode->i_mode)) {
443 if (!inode->i_nlink) {
445 hfsplus_file_truncate(inode);
447 } else if (S_ISLNK(inode->i_mode)) {
449 hfsplus_file_truncate(inode);
454 void hfsplus_inode_read_fork(struct inode *inode, struct hfsplus_fork_raw *fork)
456 struct super_block *sb = inode->i_sb;
457 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
458 struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
462 memcpy(&hip->first_extents, &fork->extents, sizeof(hfsplus_extent_rec));
463 for (count = 0, i = 0; i < 8; i++)
464 count += be32_to_cpu(fork->extents[i].block_count);
465 hip->first_blocks = count;
466 memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec));
467 hip->cached_start = 0;
468 hip->cached_blocks = 0;
470 hip->alloc_blocks = be32_to_cpu(fork->total_blocks);
471 hip->phys_size = inode->i_size = be64_to_cpu(fork->total_size);
473 (inode->i_size + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
474 inode_set_bytes(inode, hip->fs_blocks << sb->s_blocksize_bits);
476 be32_to_cpu(fork->clump_size) >> sbi->alloc_blksz_shift;
477 if (!hip->clump_blocks) {
478 hip->clump_blocks = HFSPLUS_IS_RSRC(inode) ?
479 sbi->rsrc_clump_blocks :
480 sbi->data_clump_blocks;
484 void hfsplus_inode_write_fork(struct inode *inode, struct hfsplus_fork_raw *fork)
486 memcpy(&fork->extents, &HFSPLUS_I(inode)->first_extents,
487 sizeof(hfsplus_extent_rec));
488 fork->total_size = cpu_to_be64(inode->i_size);
489 fork->total_blocks = cpu_to_be32(HFSPLUS_I(inode)->alloc_blocks);
492 int hfsplus_cat_read_inode(struct inode *inode, struct hfs_find_data *fd)
494 hfsplus_cat_entry entry;
498 type = hfs_bnode_read_u16(fd->bnode, fd->entryoffset);
500 HFSPLUS_I(inode)->linkid = 0;
501 if (type == HFSPLUS_FOLDER) {
502 struct hfsplus_cat_folder *folder = &entry.folder;
504 if (fd->entrylength < sizeof(struct hfsplus_cat_folder))
506 hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
507 sizeof(struct hfsplus_cat_folder));
508 hfsplus_get_perms(inode, &folder->permissions, 1);
510 inode->i_size = 2 + be32_to_cpu(folder->valence);
511 inode->i_atime = hfsp_mt2ut(folder->access_date);
512 inode->i_mtime = hfsp_mt2ut(folder->content_mod_date);
513 inode->i_ctime = hfsp_mt2ut(folder->attribute_mod_date);
514 HFSPLUS_I(inode)->create_date = folder->create_date;
515 HFSPLUS_I(inode)->fs_blocks = 0;
516 inode->i_op = &hfsplus_dir_inode_operations;
517 inode->i_fop = &hfsplus_dir_operations;
518 } else if (type == HFSPLUS_FILE) {
519 struct hfsplus_cat_file *file = &entry.file;
521 if (fd->entrylength < sizeof(struct hfsplus_cat_file))
523 hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
524 sizeof(struct hfsplus_cat_file));
526 hfsplus_inode_read_fork(inode, HFSPLUS_IS_DATA(inode) ?
527 &file->data_fork : &file->rsrc_fork);
528 hfsplus_get_perms(inode, &file->permissions, 0);
530 if (S_ISREG(inode->i_mode)) {
531 if (file->permissions.dev)
532 inode->i_nlink = be32_to_cpu(file->permissions.dev);
533 inode->i_op = &hfsplus_file_inode_operations;
534 inode->i_fop = &hfsplus_file_operations;
535 inode->i_mapping->a_ops = &hfsplus_aops;
536 } else if (S_ISLNK(inode->i_mode)) {
537 inode->i_op = &page_symlink_inode_operations;
538 inode->i_mapping->a_ops = &hfsplus_aops;
540 init_special_inode(inode, inode->i_mode,
541 be32_to_cpu(file->permissions.dev));
543 inode->i_atime = hfsp_mt2ut(file->access_date);
544 inode->i_mtime = hfsp_mt2ut(file->content_mod_date);
545 inode->i_ctime = hfsp_mt2ut(file->attribute_mod_date);
546 HFSPLUS_I(inode)->create_date = file->create_date;
548 printk(KERN_ERR "hfs: 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;
560 if (HFSPLUS_IS_RSRC(inode))
561 main_inode = HFSPLUS_I(inode)->rsrc_inode;
563 if (!main_inode->i_nlink)
566 if (hfs_find_init(HFSPLUS_SB(main_inode->i_sb)->cat_tree, &fd))
570 if (hfsplus_find_cat(main_inode->i_sb, main_inode->i_ino, &fd))
574 if (S_ISDIR(main_inode->i_mode)) {
575 struct hfsplus_cat_folder *folder = &entry.folder;
577 if (fd.entrylength < sizeof(struct hfsplus_cat_folder))
579 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
580 sizeof(struct hfsplus_cat_folder));
581 /* simple node checks? */
582 hfsplus_set_perms(inode, &folder->permissions);
583 folder->access_date = hfsp_ut2mt(inode->i_atime);
584 folder->content_mod_date = hfsp_ut2mt(inode->i_mtime);
585 folder->attribute_mod_date = hfsp_ut2mt(inode->i_ctime);
586 folder->valence = cpu_to_be32(inode->i_size - 2);
587 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
588 sizeof(struct hfsplus_cat_folder));
589 } else if (HFSPLUS_IS_RSRC(inode)) {
590 struct hfsplus_cat_file *file = &entry.file;
591 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
592 sizeof(struct hfsplus_cat_file));
593 hfsplus_inode_write_fork(inode, &file->rsrc_fork);
594 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
595 sizeof(struct hfsplus_cat_file));
597 struct hfsplus_cat_file *file = &entry.file;
599 if (fd.entrylength < sizeof(struct hfsplus_cat_file))
601 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
602 sizeof(struct hfsplus_cat_file));
603 hfsplus_inode_write_fork(inode, &file->data_fork);
604 hfsplus_set_perms(inode, &file->permissions);
605 if ((file->permissions.rootflags | file->permissions.userflags) & HFSPLUS_FLG_IMMUTABLE)
606 file->flags |= cpu_to_be16(HFSPLUS_FILE_LOCKED);
608 file->flags &= cpu_to_be16(~HFSPLUS_FILE_LOCKED);
609 file->access_date = hfsp_ut2mt(inode->i_atime);
610 file->content_mod_date = hfsp_ut2mt(inode->i_mtime);
611 file->attribute_mod_date = hfsp_ut2mt(inode->i_ctime);
612 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
613 sizeof(struct hfsplus_cat_file));