text: // SPDX-License-Identifier: GPL-2.0
  /*
   *  linux/fs/hfsplus/inode.c
   *
   * Copyright (C) 2001
   * Brad Boyer (flar@allandria.com)
   * (C) 2003 Ardis Technologies <roman@ardistech.com>
   *
   * Inode handling routines
   */
  
  #include <linux/blkdev.h>
  #include <linux/mm.h>
  #include <linux/fs.h>
  #include <linux/pagemap.h>
  #include <linux/mpage.h>
  #include <linux/sched.h>
  #include <linux/cred.h>
  #include <linux/uio.h>
  #include <linux/fileattr.h>
  
  #include "hfsplus_fs.h"
  #include "hfsplus_raw.h"
  #include "xattr.h"
  
  static int hfsplus_readpage(struct file *file, struct page *page)
  {
  	return block_read_full_page(page, hfsplus_get_block);
  }
  
  static int hfsplus_writepage(struct page *page, struct writeback_control *wbc)
  {
  	return block_write_full_page(page, hfsplus_get_block, wbc);
  }
  
  static void hfsplus_write_failed(struct address_space *mapping, loff_t to)
  {
  	struct inode *inode = mapping->host;
  
  	if (to > inode->i_size) {
  		truncate_pagecache(inode, inode->i_size);
  		hfsplus_file_truncate(inode);
  	}
  }
  
  static int hfsplus_write_begin(struct file *file, struct address_space *mapping,
  			loff_t pos, unsigned len, unsigned flags,
  			struct page **pagep, void **fsdata)
  {
  	int ret;
  
  	*pagep = NULL;
  	ret = cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
  				hfsplus_get_block,
  				&HFSPLUS_I(mapping->host)->phys_size);
  	if (unlikely(ret))
  		hfsplus_write_failed(mapping, pos + len);
  
  	return ret;
  }
  
  static sector_t hfsplus_bmap(struct address_space *mapping, sector_t block)
  {
  	return generic_block_bmap(mapping, block, hfsplus_get_block);
  }
  
  static int hfsplus_releasepage(struct page *page, gfp_t mask)
  {
  	struct inode *inode = page->mapping->host;
  	struct super_block *sb = inode->i_sb;
  	struct hfs_btree *tree;
  	struct hfs_bnode *node;
  	u32 nidx;
  	int i, res = 1;
  
  	switch (inode->i_ino) {
  	case HFSPLUS_EXT_CNID:
  		tree = HFSPLUS_SB(sb)->ext_tree;
  		break;
  	case HFSPLUS_CAT_CNID:
  		tree = HFSPLUS_SB(sb)->cat_tree;
  		break;
  	case HFSPLUS_ATTR_CNID:
  		tree = HFSPLUS_SB(sb)->attr_tree;
  		break;
  	default:
  		BUG();
  		return 0;
  	}
  	if (!tree)
  		return 0;
  	if (tree->node_size >= PAGE_SIZE) {
  		nidx = page->index >>
  			(tree->node_size_shift - PAGE_SHIFT);
  		spin_lock(&tree->hash_lock);
  		node = hfs_bnode_findhash(tree, nidx);
  		if (!node)
  			;
  		else if (atomic_read(&node->refcnt))
  			res = 0;
  		if (res && node) {
  			hfs_bnode_unhash(node);
  			hfs_bnode_free(node);
  		}
  		spin_unlock(&tree->hash_lock);
  	} else {
  		nidx = page->index <<
  			(PAGE_SHIFT - tree->node_size_shift);
  		i = 1 << (PAGE_SHIFT - tree->node_size_shift);
  		spin_lock(&tree->hash_lock);
  		do {
  			node = hfs_bnode_findhash(tree, nidx++);
  			if (!node)
  				continue;
  			if (atomic_read(&node->refcnt)) {
  				res = 0;
  				break;
  			}
  			hfs_bnode_unhash(node);
  			hfs_bnode_free(node);
  		} while (--i && nidx < tree->node_count);
  		spin_unlock(&tree->hash_lock);
  	}
  	return res ? try_to_free_buffers(page) : 0;
  }
  
  static ssize_t hfsplus_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
  {
  	struct file *file = iocb->ki_filp;
  	struct address_space *mapping = file->f_mapping;
  	struct inode *inode = mapping->host;
  	size_t count = iov_iter_count(iter);
  	ssize_t ret;
  
  	ret = blockdev_direct_IO(iocb, inode, iter, hfsplus_get_block);
  
  	/*
  	 * In case of error extending write may have instantiated a few
  	 * blocks outside i_size. Trim these off again.
  	 */
  	if (unlikely(iov_iter_rw(iter) == WRITE && ret < 0)) {
  		loff_t isize = i_size_read(inode);
  		loff_t end = iocb->ki_pos + count;
  
  		if (end > isize)
  			hfsplus_write_failed(mapping, end);
  	}
  
  	return ret;
  }
  
  static int hfsplus_writepages(struct address_space *mapping,
  			      struct writeback_control *wbc)
  {
  	return mpage_writepages(mapping, wbc, hfsplus_get_block);
  }
  
  const struct address_space_operations hfsplus_btree_aops = {
  	.dirty_folio	= block_dirty_folio,
  	.invalidate_folio = block_invalidate_folio,
  	.readpage	= hfsplus_readpage,
  	.writepage	= hfsplus_writepage,
  	.write_begin	= hfsplus_write_begin,
  	.write_end	= generic_write_end,
  	.bmap		= hfsplus_bmap,
  	.releasepage	= hfsplus_releasepage,
  };
  
  const struct address_space_operations hfsplus_aops = {
  	.dirty_folio	= block_dirty_folio,
  	.invalidate_folio = block_invalidate_folio,
  	.readpage	= hfsplus_readpage,
  	.writepage	= hfsplus_writepage,
  	.write_begin	= hfsplus_write_begin,
  	.write_end	= generic_write_end,
  	.bmap		= hfsplus_bmap,
  	.direct_IO	= hfsplus_direct_IO,
  	.writepages	= hfsplus_writepages,
  };
  
  const struct dentry_operations hfsplus_dentry_operations = {
  	.d_hash       = hfsplus_hash_dentry,
  	.d_compare    = hfsplus_compare_dentry,
  };
  
  static void hfsplus_get_perms(struct inode *inode,
  		struct hfsplus_perm *perms, int dir)
  {
  	struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb);
  	u16 mode;
  
  	mode = be16_to_cpu(perms->mode);
  
  	i_uid_write(inode, be32_to_cpu(perms->owner));
  	if (!i_uid_read(inode) && !mode)
  		inode->i_uid = sbi->uid;
  
  	i_gid_write(inode, be32_to_cpu(perms->group));
  	if (!i_gid_read(inode) && !mode)
  		inode->i_gid = sbi->gid;
  
  	if (dir) {
  		mode = mode ? (mode & S_IALLUGO) : (S_IRWXUGO & ~(sbi->umask));
  		mode |= S_IFDIR;
  	} else if (!mode)
  		mode = S_IFREG | ((S_IRUGO|S_IWUGO) & ~(sbi->umask));
  	inode->i_mode = mode;
  
  	HFSPLUS_I(inode)->userflags = perms->userflags;
  	if (perms->rootflags & HFSPLUS_FLG_IMMUTABLE)
  		inode->i_flags |= S_IMMUTABLE;
  	else
  		inode->i_flags &= ~S_IMMUTABLE;
  	if (perms->rootflags & HFSPLUS_FLG_APPEND)
  		inode->i_flags |= S_APPEND;
  	else
  		inode->i_flags &= ~S_APPEND;
  }
  
  static int hfsplus_file_open(struct inode *inode, struct file *file)
  {
  	if (HFSPLUS_IS_RSRC(inode))
  		inode = HFSPLUS_I(inode)->rsrc_inode;
  	if (!(file->f_flags & O_LARGEFILE) && i_size_read(inode) > MAX_NON_LFS)
  		return -EOVERFLOW;
  	atomic_inc(&HFSPLUS_I(inode)->opencnt);
  	return 0;
  }
  
  static int hfsplus_file_release(struct inode *inode, struct file *file)
  {
  	struct super_block *sb = inode->i_sb;
  
  	if (HFSPLUS_IS_RSRC(inode))
  		inode = HFSPLUS_I(inode)->rsrc_inode;
  	if (atomic_dec_and_test(&HFSPLUS_I(inode)->opencnt)) {
  		inode_lock(inode);
  		hfsplus_file_truncate(inode);
  		if (inode->i_flags & S_DEAD) {
  			hfsplus_delete_cat(inode->i_ino,
  					   HFSPLUS_SB(sb)->hidden_dir, NULL);
  			hfsplus_delete_inode(inode);
  		}
  		inode_unlock(inode);
  	}
  	return 0;
  }
  
  static int hfsplus_setattr(struct user_namespace *mnt_userns,
  			   struct dentry *dentry, struct iattr *attr)
  {
  	struct inode *inode = d_inode(dentry);
  	int error;
  
  	error = setattr_prepare(&init_user_ns, dentry, attr);
  	if (error)
  		return error;
  
  	if ((attr->ia_valid & ATTR_SIZE) &&
  	    attr->ia_size != i_size_read(inode)) {
  		inode_dio_wait(inode);
  		if (attr->ia_size > inode->i_size) {
  			error = generic_cont_expand_simple(inode,
  							   attr->ia_size);
  			if (error)
  				return error;
  		}
  		truncate_setsize(inode, attr->ia_size);
  		hfsplus_file_truncate(inode);
  		inode->i_mtime = inode->i_ctime = current_time(inode);
  	}
  
  	setattr_copy(&init_user_ns, inode, attr);
  	mark_inode_dirty(inode);
  
  	return 0;
  }
  
  int hfsplus_getattr(struct user_namespace *mnt_userns, const struct path *path,
  		    struct kstat *stat, u32 request_mask,
  		    unsigned int query_flags)
  {
  	struct inode *inode = d_inode(path->dentry);
  	struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
  
  	if (request_mask & STATX_BTIME) {
  		stat->result_mask |= STATX_BTIME;
  		stat->btime = hfsp_mt2ut(hip->create_date);
  	}
  
  	if (inode->i_flags & S_APPEND)
  		stat->attributes |= STATX_ATTR_APPEND;
  	if (inode->i_flags & S_IMMUTABLE)
  		stat->attributes |= STATX_ATTR_IMMUTABLE;
  	if (hip->userflags & HFSPLUS_FLG_NODUMP)
  		stat->attributes |= STATX_ATTR_NODUMP;
  
  	stat->attributes_mask |= STATX_ATTR_APPEND | STATX_ATTR_IMMUTABLE |
  				 STATX_ATTR_NODUMP;
  
  	generic_fillattr(&init_user_ns, inode, stat);
  	return 0;
  }
  
  int hfsplus_file_fsync(struct file *file, loff_t start, loff_t end,
  		       int datasync)
  {
  	struct inode *inode = file->f_mapping->host;
  	struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
  	struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb);
  	int error = 0, error2;
  
  	error = file_write_and_wait_range(file, start, end);
  	if (error)
  		return error;
  	inode_lock(inode);
  
  	/*
  	 * Sync inode metadata into the catalog and extent trees.
  	 */
  	sync_inode_metadata(inode, 1);
  
  	/*
  	 * And explicitly write out the btrees.
  	 */
  	if (test_and_clear_bit(HFSPLUS_I_CAT_DIRTY, &hip->flags))
  		error = filemap_write_and_wait(sbi->cat_tree->inode->i_mapping);
  
  	if (test_and_clear_bit(HFSPLUS_I_EXT_DIRTY, &hip->flags)) {
  		error2 =
  			filemap_write_and_wait(sbi->ext_tree->inode->i_mapping);
  		if (!error)
  			error = error2;
  	}
  
  	if (test_and_clear_bit(HFSPLUS_I_ATTR_DIRTY, &hip->flags)) {
  		if (sbi->attr_tree) {
  			error2 =
  				filemap_write_and_wait(
  					    sbi->attr_tree->inode->i_mapping);
  			if (!error)
  				error = error2;
  		} else {
  			pr_err("sync non-existent attributes tree\n");
  		}
  	}
  
  	if (test_and_clear_bit(HFSPLUS_I_ALLOC_DIRTY, &hip->flags)) {
  		error2 = filemap_write_and_wait(sbi->alloc_file->i_mapping);
  		if (!error)
  			error = error2;
  	}
  
  	if (!test_bit(HFSPLUS_SB_NOBARRIER, &sbi->flags))
  		blkdev_issue_flush(inode->i_sb->s_bdev);
  
  	inode_unlock(inode);
  
  	return error;
  }
  
  static const struct inode_operations hfsplus_file_inode_operations = {
  	.setattr	= hfsplus_setattr,
  	.getattr	= hfsplus_getattr,
  	.listxattr	= hfsplus_listxattr,
  	.fileattr_get	= hfsplus_fileattr_get,
  	.fileattr_set	= hfsplus_fileattr_set,
  };
  
  static const struct file_operations hfsplus_file_operations = {
  	.llseek		= generic_file_llseek,
  	.read_iter	= generic_file_read_iter,
  	.write_iter	= generic_file_write_iter,
  	.mmap		= generic_file_mmap,
  	.splice_read	= generic_file_splice_read,
  	.fsync		= hfsplus_file_fsync,
  	.open		= hfsplus_file_open,
  	.release	= hfsplus_file_release,
  	.unlocked_ioctl = hfsplus_ioctl,
  };
  
  struct inode *hfsplus_new_inode(struct super_block *sb, struct inode *dir,
  				umode_t mode)
  {
  	struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
  	struct inode *inode = new_inode(sb);
  	struct hfsplus_inode_info *hip;
  
  	if (!inode)
  		return NULL;
  
  	inode->i_ino = sbi->next_cnid++;
  	inode_init_owner(&init_user_ns, inode, dir, mode);
  	set_nlink(inode, 1);
  	inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode);
  
  	hip = HFSPLUS_I(inode);
  	INIT_LIST_HEAD(&hip->open_dir_list);
  	spin_lock_init(&hip->open_dir_lock);
  	mutex_init(&hip->extents_lock);
  	atomic_set(&hip->opencnt, 0);
  	hip->extent_state = 0;
  	hip->flags = 0;
  	hip->userflags = 0;
  	hip->subfolders = 0;
  	memset(hip->first_extents, 0, sizeof(hfsplus_extent_rec));
  	memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec));
  	hip->alloc_blocks = 0;
  	hip->first_blocks = 0;
  	hip->cached_start = 0;
  	hip->cached_blocks = 0;
  	hip->phys_size = 0;
  	hip->fs_blocks = 0;
  	hip->rsrc_inode = NULL;
  	if (S_ISDIR(inode->i_mode)) {
  		inode->i_size = 2;
  		sbi->folder_count++;
  		inode->i_op = &hfsplus_dir_inode_operations;
  		inode->i_fop = &hfsplus_dir_operations;
  	} else if (S_ISREG(inode->i_mode)) {
  		sbi->file_count++;
  		inode->i_op = &hfsplus_file_inode_operations;
  		inode->i_fop = &hfsplus_file_operations;
  		inode->i_mapping->a_ops = &hfsplus_aops;
  		hip->clump_blocks = sbi->data_clump_blocks;
  	} else if (S_ISLNK(inode->i_mode)) {
  		sbi->file_count++;
  		inode->i_op = &page_symlink_inode_operations;
  		inode_nohighmem(inode);
  		inode->i_mapping->a_ops = &hfsplus_aops;
  		hip->clump_blocks = 1;
  	} else
  		sbi->file_count++;
  	insert_inode_hash(inode);
  	mark_inode_dirty(inode);
  	hfsplus_mark_mdb_dirty(sb);
  
  	return inode;
  }
  
  void hfsplus_delete_inode(struct inode *inode)
  {
  	struct super_block *sb = inode->i_sb;
  
  	if (S_ISDIR(inode->i_mode)) {
  		HFSPLUS_SB(sb)->folder_count--;
  		hfsplus_mark_mdb_dirty(sb);
  		return;
  	}
  	HFSPLUS_SB(sb)->file_count--;
  	if (S_ISREG(inode->i_mode)) {
  		if (!inode->i_nlink) {
  			inode->i_size = 0;
  			hfsplus_file_truncate(inode);
  		}
  	} else if (S_ISLNK(inode->i_mode)) {
  		inode->i_size = 0;
  		hfsplus_file_truncate(inode);
  	}
  	hfsplus_mark_mdb_dirty(sb);
  }
  
  void hfsplus_inode_read_fork(struct inode *inode, struct hfsplus_fork_raw *fork)
  {
  	struct super_block *sb = inode->i_sb;
  	struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
  	struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
  	u32 count;
  	int i;
  
  	memcpy(&hip->first_extents, &fork->extents, sizeof(hfsplus_extent_rec));
  	for (count = 0, i = 0; i < 8; i++)
  		count += be32_to_cpu(fork->extents[i].block_count);
  	hip->first_blocks = count;
  	memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec));
  	hip->cached_start = 0;
  	hip->cached_blocks = 0;
  
  	hip->alloc_blocks = be32_to_cpu(fork->total_blocks);
  	hip->phys_size = inode->i_size = be64_to_cpu(fork->total_size);
  	hip->fs_blocks =
  		(inode->i_size + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
  	inode_set_bytes(inode, hip->fs_blocks << sb->s_blocksize_bits);
  	hip->clump_blocks =
  		be32_to_cpu(fork->clump_size) >> sbi->alloc_blksz_shift;
  	if (!hip->clump_blocks) {
  		hip->clump_blocks = HFSPLUS_IS_RSRC(inode) ?
  			sbi->rsrc_clump_blocks :
  			sbi->data_clump_blocks;
  	}
  }
  
  void hfsplus_inode_write_fork(struct inode *inode,
  		struct hfsplus_fork_raw *fork)
  {
  	memcpy(&fork->extents, &HFSPLUS_I(inode)->first_extents,
  	       sizeof(hfsplus_extent_rec));
  	fork->total_size = cpu_to_be64(inode->i_size);
  	fork->total_blocks = cpu_to_be32(HFSPLUS_I(inode)->alloc_blocks);
  }
  
  int hfsplus_cat_read_inode(struct inode *inode, struct hfs_find_data *fd)
  {
  	hfsplus_cat_entry entry;
  	int res = 0;
  	u16 type;
  
  	type = hfs_bnode_read_u16(fd->bnode, fd->entryoffset);
  
  	HFSPLUS_I(inode)->linkid = 0;
  	if (type == HFSPLUS_FOLDER) {
  		struct hfsplus_cat_folder *folder = &entry.folder;
  
  		WARN_ON(fd->entrylength < sizeof(struct hfsplus_cat_folder));
  		hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
  					sizeof(struct hfsplus_cat_folder));
  		hfsplus_get_perms(inode, &folder->permissions, 1);
  		set_nlink(inode, 1);
  		inode->i_size = 2 + be32_to_cpu(folder->valence);
  		inode->i_atime = hfsp_mt2ut(folder->access_date);
  		inode->i_mtime = hfsp_mt2ut(folder->content_mod_date);
  		inode->i_ctime = hfsp_mt2ut(folder->attribute_mod_date);
  		HFSPLUS_I(inode)->create_date = folder->create_date;
  		HFSPLUS_I(inode)->fs_blocks = 0;
  		if (folder->flags & cpu_to_be16(HFSPLUS_HAS_FOLDER_COUNT)) {
  			HFSPLUS_I(inode)->subfolders =
  				be32_to_cpu(folder->subfolders);
  		}
  		inode->i_op = &hfsplus_dir_inode_operations;
  		inode->i_fop = &hfsplus_dir_operations;
  	} else if (type == HFSPLUS_FILE) {
  		struct hfsplus_cat_file *file = &entry.file;
  
  		WARN_ON(fd->entrylength < sizeof(struct hfsplus_cat_file));
  		hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
  					sizeof(struct hfsplus_cat_file));
  
  		hfsplus_inode_read_fork(inode, HFSPLUS_IS_RSRC(inode) ?
  					&file->rsrc_fork : &file->data_fork);
  		hfsplus_get_perms(inode, &file->permissions, 0);
  		set_nlink(inode, 1);
  		if (S_ISREG(inode->i_mode)) {
  			if (file->permissions.dev)
  				set_nlink(inode,
  					  be32_to_cpu(file->permissions.dev));
  			inode->i_op = &hfsplus_file_inode_operations;
  			inode->i_fop = &hfsplus_file_operations;
  			inode->i_mapping->a_ops = &hfsplus_aops;
  		} else if (S_ISLNK(inode->i_mode)) {
  			inode->i_op = &page_symlink_inode_operations;
  			inode_nohighmem(inode);
  			inode->i_mapping->a_ops = &hfsplus_aops;
  		} else {
  			init_special_inode(inode, inode->i_mode,
  					   be32_to_cpu(file->permissions.dev));
  		}
  		inode->i_atime = hfsp_mt2ut(file->access_date);
  		inode->i_mtime = hfsp_mt2ut(file->content_mod_date);
  		inode->i_ctime = hfsp_mt2ut(file->attribute_mod_date);
  		HFSPLUS_I(inode)->create_date = file->create_date;
  	} else {
  		pr_err("bad catalog entry used to create inode\n");
  		res = -EIO;
  	}
  	return res;
  }
  
  int hfsplus_cat_write_inode(struct inode *inode)
  {
  	struct inode *main_inode = inode;
  	struct hfs_find_data fd;
  	hfsplus_cat_entry entry;
  
  	if (HFSPLUS_IS_RSRC(inode))
  		main_inode = HFSPLUS_I(inode)->rsrc_inode;
  
  	if (!main_inode->i_nlink)
  		return 0;
  
  	if (hfs_find_init(HFSPLUS_SB(main_inode->i_sb)->cat_tree, &fd))
  		/* panic? */
  		return -EIO;
  
  	if (hfsplus_find_cat(main_inode->i_sb, main_inode->i_ino, &fd))
  		/* panic? */
  		goto out;
  
  	if (S_ISDIR(main_inode->i_mode)) {
  		struct hfsplus_cat_folder *folder = &entry.folder;
  
  		WARN_ON(fd.entrylength < sizeof(struct hfsplus_cat_folder));
  		hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
  					sizeof(struct hfsplus_cat_folder));
  		/* simple node checks? */
  		hfsplus_cat_set_perms(inode, &folder->permissions);
  		folder->access_date = hfsp_ut2mt(inode->i_atime);
  		folder->content_mod_date = hfsp_ut2mt(inode->i_mtime);
  		folder->attribute_mod_date = hfsp_ut2mt(inode->i_ctime);
  		folder->valence = cpu_to_be32(inode->i_size - 2);
  		if (folder->flags & cpu_to_be16(HFSPLUS_HAS_FOLDER_COUNT)) {
  			folder->subfolders =
  				cpu_to_be32(HFSPLUS_I(inode)->subfolders);
  		}
  		hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
  					 sizeof(struct hfsplus_cat_folder));
  	} else if (HFSPLUS_IS_RSRC(inode)) {
  		struct hfsplus_cat_file *file = &entry.file;
  		hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
  			       sizeof(struct hfsplus_cat_file));
  		hfsplus_inode_write_fork(inode, &file->rsrc_fork);
  		hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
  				sizeof(struct hfsplus_cat_file));
  	} else {
  		struct hfsplus_cat_file *file = &entry.file;
  
  		WARN_ON(fd.entrylength < sizeof(struct hfsplus_cat_file));
  		hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
  					sizeof(struct hfsplus_cat_file));
  		hfsplus_inode_write_fork(inode, &file->data_fork);
  		hfsplus_cat_set_perms(inode, &file->permissions);
  		if (HFSPLUS_FLG_IMMUTABLE &
  				(file->permissions.rootflags |
  					file->permissions.userflags))
  			file->flags |= cpu_to_be16(HFSPLUS_FILE_LOCKED);
  		else
  			file->flags &= cpu_to_be16(~HFSPLUS_FILE_LOCKED);
  		file->access_date = hfsp_ut2mt(inode->i_atime);
  		file->content_mod_date = hfsp_ut2mt(inode->i_mtime);
  		file->attribute_mod_date = hfsp_ut2mt(inode->i_ctime);
  		hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
  					 sizeof(struct hfsplus_cat_file));
  	}
  
  	set_bit(HFSPLUS_I_CAT_DIRTY, &HFSPLUS_I(inode)->flags);
  out:
  	hfs_find_exit(&fd);
  	return 0;
  }
  
  int hfsplus_fileattr_get(struct dentry *dentry, struct fileattr *fa)
  {
  	struct inode *inode = d_inode(dentry);
  	struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
  	unsigned int flags = 0;
  
  	if (inode->i_flags & S_IMMUTABLE)
  		flags |= FS_IMMUTABLE_FL;
  	if (inode->i_flags & S_APPEND)
  		flags |= FS_APPEND_FL;
  	if (hip->userflags & HFSPLUS_FLG_NODUMP)
  		flags |= FS_NODUMP_FL;
  
  	fileattr_fill_flags(fa, flags);
  
  	return 0;
  }
  
  int hfsplus_fileattr_set(struct user_namespace *mnt_userns,
  			 struct dentry *dentry, struct fileattr *fa)
  {
  	struct inode *inode = d_inode(dentry);
  	struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
  	unsigned int new_fl = 0;
  
  	if (fileattr_has_fsx(fa))
  		return -EOPNOTSUPP;
  
  	/* don't silently ignore unsupported ext2 flags */
  	if (fa->flags & ~(FS_IMMUTABLE_FL|FS_APPEND_FL|FS_NODUMP_FL))
  		return -EOPNOTSUPP;
  
  	if (fa->flags & FS_IMMUTABLE_FL)
  		new_fl |= S_IMMUTABLE;
  
  	if (fa->flags & FS_APPEND_FL)
  		new_fl |= S_APPEND;
  
  	inode_set_flags(inode, new_fl, S_IMMUTABLE | S_APPEND);
  
  	if (fa->flags & FS_NODUMP_FL)
  		hip->userflags |= HFSPLUS_FLG_NODUMP;
  	else
  		hip->userflags &= ~HFSPLUS_FLG_NODUMP;
  
  	inode->i_ctime = current_time(inode);
  	mark_inode_dirty(inode);
  
  	return 0;
  }
  