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 if (attr->ia_size > inode->i_size) {
258 error = generic_cont_expand_simple(inode,
263 truncate_setsize(inode, attr->ia_size);
264 hfsplus_file_truncate(inode);
267 setattr_copy(inode, attr);
268 mark_inode_dirty(inode);
270 if (attr->ia_valid & ATTR_MODE) {
271 error = posix_acl_chmod(inode, inode->i_mode);
279 int hfsplus_file_fsync(struct file *file, loff_t start, loff_t end,
282 struct inode *inode = file->f_mapping->host;
283 struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
284 struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb);
285 int error = 0, error2;
287 error = filemap_write_and_wait_range(inode->i_mapping, start, end);
290 mutex_lock(&inode->i_mutex);
293 * Sync inode metadata into the catalog and extent trees.
295 sync_inode_metadata(inode, 1);
298 * And explicitly write out the btrees.
300 if (test_and_clear_bit(HFSPLUS_I_CAT_DIRTY, &hip->flags))
301 error = filemap_write_and_wait(sbi->cat_tree->inode->i_mapping);
303 if (test_and_clear_bit(HFSPLUS_I_EXT_DIRTY, &hip->flags)) {
305 filemap_write_and_wait(sbi->ext_tree->inode->i_mapping);
310 if (test_and_clear_bit(HFSPLUS_I_ATTR_DIRTY, &hip->flags)) {
311 if (sbi->attr_tree) {
313 filemap_write_and_wait(
314 sbi->attr_tree->inode->i_mapping);
318 pr_err("sync non-existent attributes tree\n");
322 if (test_and_clear_bit(HFSPLUS_I_ALLOC_DIRTY, &hip->flags)) {
323 error2 = filemap_write_and_wait(sbi->alloc_file->i_mapping);
328 if (!test_bit(HFSPLUS_SB_NOBARRIER, &sbi->flags))
329 blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL, NULL);
331 mutex_unlock(&inode->i_mutex);
336 static const struct inode_operations hfsplus_file_inode_operations = {
337 .setattr = hfsplus_setattr,
338 .setxattr = generic_setxattr,
339 .getxattr = generic_getxattr,
340 .listxattr = hfsplus_listxattr,
341 .removexattr = generic_removexattr,
342 #ifdef CONFIG_HFSPLUS_FS_POSIX_ACL
343 .get_acl = hfsplus_get_posix_acl,
344 .set_acl = hfsplus_set_posix_acl,
348 static const struct file_operations hfsplus_file_operations = {
349 .llseek = generic_file_llseek,
350 .read_iter = generic_file_read_iter,
351 .write_iter = generic_file_write_iter,
352 .mmap = generic_file_mmap,
353 .splice_read = generic_file_splice_read,
354 .fsync = hfsplus_file_fsync,
355 .open = hfsplus_file_open,
356 .release = hfsplus_file_release,
357 .unlocked_ioctl = hfsplus_ioctl,
360 struct inode *hfsplus_new_inode(struct super_block *sb, umode_t mode)
362 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
363 struct inode *inode = new_inode(sb);
364 struct hfsplus_inode_info *hip;
369 inode->i_ino = sbi->next_cnid++;
370 inode->i_mode = mode;
371 inode->i_uid = current_fsuid();
372 inode->i_gid = current_fsgid();
374 inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME_SEC;
376 hip = HFSPLUS_I(inode);
377 INIT_LIST_HEAD(&hip->open_dir_list);
378 mutex_init(&hip->extents_lock);
379 atomic_set(&hip->opencnt, 0);
380 hip->extent_state = 0;
384 memset(hip->first_extents, 0, sizeof(hfsplus_extent_rec));
385 memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec));
386 hip->alloc_blocks = 0;
387 hip->first_blocks = 0;
388 hip->cached_start = 0;
389 hip->cached_blocks = 0;
392 hip->rsrc_inode = NULL;
393 if (S_ISDIR(inode->i_mode)) {
396 inode->i_op = &hfsplus_dir_inode_operations;
397 inode->i_fop = &hfsplus_dir_operations;
398 } else if (S_ISREG(inode->i_mode)) {
400 inode->i_op = &hfsplus_file_inode_operations;
401 inode->i_fop = &hfsplus_file_operations;
402 inode->i_mapping->a_ops = &hfsplus_aops;
403 hip->clump_blocks = sbi->data_clump_blocks;
404 } else if (S_ISLNK(inode->i_mode)) {
406 inode->i_op = &page_symlink_inode_operations;
407 inode->i_mapping->a_ops = &hfsplus_aops;
408 hip->clump_blocks = 1;
411 insert_inode_hash(inode);
412 mark_inode_dirty(inode);
413 hfsplus_mark_mdb_dirty(sb);
418 void hfsplus_delete_inode(struct inode *inode)
420 struct super_block *sb = inode->i_sb;
422 if (S_ISDIR(inode->i_mode)) {
423 HFSPLUS_SB(sb)->folder_count--;
424 hfsplus_mark_mdb_dirty(sb);
427 HFSPLUS_SB(sb)->file_count--;
428 if (S_ISREG(inode->i_mode)) {
429 if (!inode->i_nlink) {
431 hfsplus_file_truncate(inode);
433 } else if (S_ISLNK(inode->i_mode)) {
435 hfsplus_file_truncate(inode);
437 hfsplus_mark_mdb_dirty(sb);
440 void hfsplus_inode_read_fork(struct inode *inode, struct hfsplus_fork_raw *fork)
442 struct super_block *sb = inode->i_sb;
443 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
444 struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
448 memcpy(&hip->first_extents, &fork->extents, sizeof(hfsplus_extent_rec));
449 for (count = 0, i = 0; i < 8; i++)
450 count += be32_to_cpu(fork->extents[i].block_count);
451 hip->first_blocks = count;
452 memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec));
453 hip->cached_start = 0;
454 hip->cached_blocks = 0;
456 hip->alloc_blocks = be32_to_cpu(fork->total_blocks);
457 hip->phys_size = inode->i_size = be64_to_cpu(fork->total_size);
459 (inode->i_size + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
460 inode_set_bytes(inode, hip->fs_blocks << sb->s_blocksize_bits);
462 be32_to_cpu(fork->clump_size) >> sbi->alloc_blksz_shift;
463 if (!hip->clump_blocks) {
464 hip->clump_blocks = HFSPLUS_IS_RSRC(inode) ?
465 sbi->rsrc_clump_blocks :
466 sbi->data_clump_blocks;
470 void hfsplus_inode_write_fork(struct inode *inode,
471 struct hfsplus_fork_raw *fork)
473 memcpy(&fork->extents, &HFSPLUS_I(inode)->first_extents,
474 sizeof(hfsplus_extent_rec));
475 fork->total_size = cpu_to_be64(inode->i_size);
476 fork->total_blocks = cpu_to_be32(HFSPLUS_I(inode)->alloc_blocks);
479 int hfsplus_cat_read_inode(struct inode *inode, struct hfs_find_data *fd)
481 hfsplus_cat_entry entry;
485 type = hfs_bnode_read_u16(fd->bnode, fd->entryoffset);
487 HFSPLUS_I(inode)->linkid = 0;
488 if (type == HFSPLUS_FOLDER) {
489 struct hfsplus_cat_folder *folder = &entry.folder;
491 if (fd->entrylength < sizeof(struct hfsplus_cat_folder))
493 hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
494 sizeof(struct hfsplus_cat_folder));
495 hfsplus_get_perms(inode, &folder->permissions, 1);
497 inode->i_size = 2 + be32_to_cpu(folder->valence);
498 inode->i_atime = hfsp_mt2ut(folder->access_date);
499 inode->i_mtime = hfsp_mt2ut(folder->content_mod_date);
500 inode->i_ctime = hfsp_mt2ut(folder->attribute_mod_date);
501 HFSPLUS_I(inode)->create_date = folder->create_date;
502 HFSPLUS_I(inode)->fs_blocks = 0;
503 if (folder->flags & cpu_to_be16(HFSPLUS_HAS_FOLDER_COUNT)) {
504 HFSPLUS_I(inode)->subfolders =
505 be32_to_cpu(folder->subfolders);
507 inode->i_op = &hfsplus_dir_inode_operations;
508 inode->i_fop = &hfsplus_dir_operations;
509 } else if (type == HFSPLUS_FILE) {
510 struct hfsplus_cat_file *file = &entry.file;
512 if (fd->entrylength < sizeof(struct hfsplus_cat_file))
514 hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
515 sizeof(struct hfsplus_cat_file));
517 hfsplus_inode_read_fork(inode, HFSPLUS_IS_RSRC(inode) ?
518 &file->rsrc_fork : &file->data_fork);
519 hfsplus_get_perms(inode, &file->permissions, 0);
521 if (S_ISREG(inode->i_mode)) {
522 if (file->permissions.dev)
524 be32_to_cpu(file->permissions.dev));
525 inode->i_op = &hfsplus_file_inode_operations;
526 inode->i_fop = &hfsplus_file_operations;
527 inode->i_mapping->a_ops = &hfsplus_aops;
528 } else if (S_ISLNK(inode->i_mode)) {
529 inode->i_op = &page_symlink_inode_operations;
530 inode->i_mapping->a_ops = &hfsplus_aops;
532 init_special_inode(inode, inode->i_mode,
533 be32_to_cpu(file->permissions.dev));
535 inode->i_atime = hfsp_mt2ut(file->access_date);
536 inode->i_mtime = hfsp_mt2ut(file->content_mod_date);
537 inode->i_ctime = hfsp_mt2ut(file->attribute_mod_date);
538 HFSPLUS_I(inode)->create_date = file->create_date;
540 pr_err("bad catalog entry used to create inode\n");
546 int hfsplus_cat_write_inode(struct inode *inode)
548 struct inode *main_inode = inode;
549 struct hfs_find_data fd;
550 hfsplus_cat_entry entry;
552 if (HFSPLUS_IS_RSRC(inode))
553 main_inode = HFSPLUS_I(inode)->rsrc_inode;
555 if (!main_inode->i_nlink)
558 if (hfs_find_init(HFSPLUS_SB(main_inode->i_sb)->cat_tree, &fd))
562 if (hfsplus_find_cat(main_inode->i_sb, main_inode->i_ino, &fd))
566 if (S_ISDIR(main_inode->i_mode)) {
567 struct hfsplus_cat_folder *folder = &entry.folder;
569 if (fd.entrylength < sizeof(struct hfsplus_cat_folder))
571 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
572 sizeof(struct hfsplus_cat_folder));
573 /* simple node checks? */
574 hfsplus_cat_set_perms(inode, &folder->permissions);
575 folder->access_date = hfsp_ut2mt(inode->i_atime);
576 folder->content_mod_date = hfsp_ut2mt(inode->i_mtime);
577 folder->attribute_mod_date = hfsp_ut2mt(inode->i_ctime);
578 folder->valence = cpu_to_be32(inode->i_size - 2);
579 if (folder->flags & cpu_to_be16(HFSPLUS_HAS_FOLDER_COUNT)) {
581 cpu_to_be32(HFSPLUS_I(inode)->subfolders);
583 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
584 sizeof(struct hfsplus_cat_folder));
585 } else if (HFSPLUS_IS_RSRC(inode)) {
586 struct hfsplus_cat_file *file = &entry.file;
587 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
588 sizeof(struct hfsplus_cat_file));
589 hfsplus_inode_write_fork(inode, &file->rsrc_fork);
590 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
591 sizeof(struct hfsplus_cat_file));
593 struct hfsplus_cat_file *file = &entry.file;
595 if (fd.entrylength < sizeof(struct hfsplus_cat_file))
597 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
598 sizeof(struct hfsplus_cat_file));
599 hfsplus_inode_write_fork(inode, &file->data_fork);
600 hfsplus_cat_set_perms(inode, &file->permissions);
601 if (HFSPLUS_FLG_IMMUTABLE &
602 (file->permissions.rootflags |
603 file->permissions.userflags))
604 file->flags |= cpu_to_be16(HFSPLUS_FILE_LOCKED);
606 file->flags &= cpu_to_be16(~HFSPLUS_FILE_LOCKED);
607 file->access_date = hfsp_ut2mt(inode->i_atime);
608 file->content_mod_date = hfsp_ut2mt(inode->i_mtime);
609 file->attribute_mod_date = hfsp_ut2mt(inode->i_ctime);
610 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
611 sizeof(struct hfsplus_cat_file));
614 set_bit(HFSPLUS_I_CAT_DIRTY, &HFSPLUS_I(inode)->flags);