[linux-2.6-block.git] / fs / hfsplus / inode.c

// 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_read_folio(struct file *file, struct folio *folio)
{
	return block_read_full_folio(folio, hfsplus_get_block);
}

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);
	}
}

int hfsplus_write_begin(struct file *file, struct address_space *mapping,
		loff_t pos, unsigned len, struct folio **foliop, void **fsdata)
{
	int ret;

	ret = cont_write_begin(file, mapping, pos, len, foliop, 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 bool hfsplus_release_folio(struct folio *folio, gfp_t mask)
{
	struct inode *inode = folio->mapping->host;
	struct super_block *sb = inode->i_sb;
	struct hfs_btree *tree;
	struct hfs_bnode *node;
	u32 nidx;
	int i;
	bool res = true;

	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 false;
	}
	if (!tree)
		return false;
	if (tree->node_size >= PAGE_SIZE) {
		nidx = folio->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 = false;
		if (res && node) {
			hfs_bnode_unhash(node);
			hfs_bnode_free(node);
		}
		spin_unlock(&tree->hash_lock);
	} else {
		nidx = folio->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 = false;
				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(folio) : false;
}

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,
	.read_folio	= hfsplus_read_folio,
	.writepages	= hfsplus_writepages,
	.write_begin	= hfsplus_write_begin,
	.write_end	= generic_write_end,
	.migrate_folio	= buffer_migrate_folio,
	.bmap		= hfsplus_bmap,
	.release_folio	= hfsplus_release_folio,
};

const struct address_space_operations hfsplus_aops = {
	.dirty_folio	= block_dirty_folio,
	.invalidate_folio = block_invalidate_folio,
	.read_folio	= hfsplus_read_folio,
	.write_begin	= hfsplus_write_begin,
	.write_end	= generic_write_end,
	.bmap		= hfsplus_bmap,
	.direct_IO	= hfsplus_direct_IO,
	.writepages	= hfsplus_writepages,
	.migrate_folio	= buffer_migrate_folio,
};

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 ((test_bit(HFSPLUS_SB_UID, &sbi->flags)) || (!i_uid_read(inode) && !mode))
		inode->i_uid = sbi->uid;

	i_gid_write(inode, be32_to_cpu(perms->group));
	if ((test_bit(HFSPLUS_SB_GID, &sbi->flags)) || (!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 mnt_idmap *idmap,
			   struct dentry *dentry, struct iattr *attr)
{
	struct inode *inode = d_inode(dentry);
	int error;

	error = setattr_prepare(&nop_mnt_idmap, 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_set_mtime_to_ts(inode, inode_set_ctime_current(inode));
	}

	setattr_copy(&nop_mnt_idmap, inode, attr);
	mark_inode_dirty(inode);

	return 0;
}

int hfsplus_getattr(struct mnt_idmap *idmap, 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(&nop_mnt_idmap, request_mask, 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	= filemap_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(&nop_mnt_idmap, inode, dir, mode);
	set_nlink(inode, 1);
	simple_inode_init_ts(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;

		if (fd->entrylength < sizeof(struct hfsplus_cat_folder)) {
			pr_err("bad catalog folder entry\n");
			res = -EIO;
			goto out;
		}
		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_set_atime_to_ts(inode, hfsp_mt2ut(folder->access_date));
		inode_set_mtime_to_ts(inode,
				      hfsp_mt2ut(folder->content_mod_date));
		inode_set_ctime_to_ts(inode,
				      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;

		if (fd->entrylength < sizeof(struct hfsplus_cat_file)) {
			pr_err("bad catalog file entry\n");
			res = -EIO;
			goto out;
		}
		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_set_atime_to_ts(inode, hfsp_mt2ut(file->access_date));
		inode_set_mtime_to_ts(inode,
				      hfsp_mt2ut(file->content_mod_date));
		inode_set_ctime_to_ts(inode,
				      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;
	}
out:
	return res;
}

int hfsplus_cat_write_inode(struct inode *inode)
{
	struct inode *main_inode = inode;
	struct hfs_find_data fd;
	hfsplus_cat_entry entry;
	int res = 0;

	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;

		if (fd.entrylength < sizeof(struct hfsplus_cat_folder)) {
			pr_err("bad catalog folder entry\n");
			res = -EIO;
			goto out;
		}
		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_get_atime(inode));
		folder->content_mod_date = hfsp_ut2mt(inode_get_mtime(inode));
		folder->attribute_mod_date = hfsp_ut2mt(inode_get_ctime(inode));
		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;

		if (fd.entrylength < sizeof(struct hfsplus_cat_file)) {
			pr_err("bad catalog file entry\n");
			res = -EIO;
			goto out;
		}
		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_get_atime(inode));
		file->content_mod_date = hfsp_ut2mt(inode_get_mtime(inode));
		file->attribute_mod_date = hfsp_ut2mt(inode_get_ctime(inode));
		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 res;
}

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 mnt_idmap *idmap,
			 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_set_ctime_current(inode);
	mark_inode_dirty(inode);

	return 0;
}
Commit	Line	Data
	1	// SPDX-License-Identifier: GPL-2.0
	2	/*
	3	* linux/fs/hfsplus/inode.c
	4	*
	5	* Copyright (C) 2001
	6	* Brad Boyer (flar@allandria.com)
	7	* (C) 2003 Ardis Technologies <roman@ardistech.com>
	8	*
	9	* Inode handling routines
	10	*/
	11
	12	#include <linux/blkdev.h>
	13	#include <linux/mm.h>
	14	#include <linux/fs.h>
	15	#include <linux/pagemap.h>
	16	#include <linux/mpage.h>
	17	#include <linux/sched.h>
	18	#include <linux/cred.h>
	19	#include <linux/uio.h>
	20	#include <linux/fileattr.h>
	21
	22	#include "hfsplus_fs.h"
	23	#include "hfsplus_raw.h"
	24	#include "xattr.h"
	25
	26	static int hfsplus_read_folio(struct file file, struct folio folio)
	27	{
	28	return block_read_full_folio(folio, hfsplus_get_block);
	29	}
	30
	31	static void hfsplus_write_failed(struct address_space *mapping, loff_t to)
	32	{
	33	struct inode *inode = mapping->host;
	34
	35	if (to > inode->i_size) {
	36	truncate_pagecache(inode, inode->i_size);
	37	hfsplus_file_truncate(inode);
	38	}
	39	}
	40
	41	int hfsplus_write_begin(struct file file, struct address_space mapping,
	42	loff_t pos, unsigned len, struct folio foliop, void fsdata)
	43	{
	44	int ret;
	45
	46	ret = cont_write_begin(file, mapping, pos, len, foliop, fsdata,
	47	hfsplus_get_block,
	48	&HFSPLUS_I(mapping->host)->phys_size);
	49	if (unlikely(ret))
	50	hfsplus_write_failed(mapping, pos + len);
	51
	52	return ret;
	53	}
	54
	55	static sector_t hfsplus_bmap(struct address_space *mapping, sector_t block)
	56	{
	57	return generic_block_bmap(mapping, block, hfsplus_get_block);
	58	}
	59
	60	static bool hfsplus_release_folio(struct folio *folio, gfp_t mask)
	61	{
	62	struct inode *inode = folio->mapping->host;
	63	struct super_block *sb = inode->i_sb;
	64	struct hfs_btree *tree;
	65	struct hfs_bnode *node;
	66	u32 nidx;
	67	int i;
	68	bool res = true;
	69
	70	switch (inode->i_ino) {
	71	case HFSPLUS_EXT_CNID:
	72	tree = HFSPLUS_SB(sb)->ext_tree;
	73	break;
	74	case HFSPLUS_CAT_CNID:
	75	tree = HFSPLUS_SB(sb)->cat_tree;
	76	break;
	77	case HFSPLUS_ATTR_CNID:
	78	tree = HFSPLUS_SB(sb)->attr_tree;
	79	break;
	80	default:
	81	BUG();
	82	return false;
	83	}
	84	if (!tree)
	85	return false;
	86	if (tree->node_size >= PAGE_SIZE) {
	87	nidx = folio->index >>
	88	(tree->node_size_shift - PAGE_SHIFT);
	89	spin_lock(&tree->hash_lock);
	90	node = hfs_bnode_findhash(tree, nidx);
	91	if (!node)
	92	;
	93	else if (atomic_read(&node->refcnt))
	94	res = false;
	95	if (res && node) {
	96	hfs_bnode_unhash(node);
	97	hfs_bnode_free(node);
	98	}
	99	spin_unlock(&tree->hash_lock);
	100	} else {
	101	nidx = folio->index <<
	102	(PAGE_SHIFT - tree->node_size_shift);
	103	i = 1 << (PAGE_SHIFT - tree->node_size_shift);
	104	spin_lock(&tree->hash_lock);
	105	do {
	106	node = hfs_bnode_findhash(tree, nidx++);
	107	if (!node)
	108	continue;
	109	if (atomic_read(&node->refcnt)) {
	110	res = false;
	111	break;
	112	}
	113	hfs_bnode_unhash(node);
	114	hfs_bnode_free(node);
	115	} while (--i && nidx < tree->node_count);
	116	spin_unlock(&tree->hash_lock);
	117	}
	118	return res ? try_to_free_buffers(folio) : false;
	119	}
	120
	121	static ssize_t hfsplus_direct_IO(struct kiocb iocb, struct iov_iter iter)
	122	{
	123	struct file *file = iocb->ki_filp;
	124	struct address_space *mapping = file->f_mapping;
	125	struct inode *inode = mapping->host;
	126	size_t count = iov_iter_count(iter);
	127	ssize_t ret;
	128
	129	ret = blockdev_direct_IO(iocb, inode, iter, hfsplus_get_block);
	130
	131	/*
	132	* In case of error extending write may have instantiated a few
	133	* blocks outside i_size. Trim these off again.
	134	*/
	135	if (unlikely(iov_iter_rw(iter) == WRITE && ret < 0)) {
	136	loff_t isize = i_size_read(inode);
	137	loff_t end = iocb->ki_pos + count;
	138
	139	if (end > isize)
	140	hfsplus_write_failed(mapping, end);
	141	}
	142
	143	return ret;
	144	}
	145
	146	static int hfsplus_writepages(struct address_space *mapping,
	147	struct writeback_control *wbc)
	148	{
	149	return mpage_writepages(mapping, wbc, hfsplus_get_block);
	150	}
	151
	152	const struct address_space_operations hfsplus_btree_aops = {
	153	.dirty_folio = block_dirty_folio,
	154	.invalidate_folio = block_invalidate_folio,
	155	.read_folio = hfsplus_read_folio,
	156	.writepages = hfsplus_writepages,
	157	.write_begin = hfsplus_write_begin,
	158	.write_end = generic_write_end,
	159	.migrate_folio = buffer_migrate_folio,
	160	.bmap = hfsplus_bmap,
	161	.release_folio = hfsplus_release_folio,
	162	};
	163
	164	const struct address_space_operations hfsplus_aops = {
	165	.dirty_folio = block_dirty_folio,
	166	.invalidate_folio = block_invalidate_folio,
	167	.read_folio = hfsplus_read_folio,
	168	.write_begin = hfsplus_write_begin,
	169	.write_end = generic_write_end,
	170	.bmap = hfsplus_bmap,
	171	.direct_IO = hfsplus_direct_IO,
	172	.writepages = hfsplus_writepages,
	173	.migrate_folio = buffer_migrate_folio,
	174	};
	175
	176	const struct dentry_operations hfsplus_dentry_operations = {
	177	.d_hash = hfsplus_hash_dentry,
	178	.d_compare = hfsplus_compare_dentry,
	179	};
	180
	181	static void hfsplus_get_perms(struct inode *inode,
	182	struct hfsplus_perm *perms, int dir)
	183	{
	184	struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb);
	185	u16 mode;
	186
	187	mode = be16_to_cpu(perms->mode);
	188
	189	i_uid_write(inode, be32_to_cpu(perms->owner));
	190	if ((test_bit(HFSPLUS_SB_UID, &sbi->flags)) \|\| (!i_uid_read(inode) && !mode))
	191	inode->i_uid = sbi->uid;
	192
	193	i_gid_write(inode, be32_to_cpu(perms->group));
	194	if ((test_bit(HFSPLUS_SB_GID, &sbi->flags)) \|\| (!i_gid_read(inode) && !mode))
	195	inode->i_gid = sbi->gid;
	196
	197	if (dir) {
	198	mode = mode ? (mode & S_IALLUGO) : (S_IRWXUGO & ~(sbi->umask));
	199	mode \|= S_IFDIR;
	200	} else if (!mode)
	201	mode = S_IFREG \| ((S_IRUGO\|S_IWUGO) & ~(sbi->umask));
	202	inode->i_mode = mode;
	203
	204	HFSPLUS_I(inode)->userflags = perms->userflags;
	205	if (perms->rootflags & HFSPLUS_FLG_IMMUTABLE)
	206	inode->i_flags \|= S_IMMUTABLE;
	207	else
	208	inode->i_flags &= ~S_IMMUTABLE;
	209	if (perms->rootflags & HFSPLUS_FLG_APPEND)
	210	inode->i_flags \|= S_APPEND;
	211	else
	212	inode->i_flags &= ~S_APPEND;
	213	}
	214
	215	static int hfsplus_file_open(struct inode inode, struct file file)
	216	{
	217	if (HFSPLUS_IS_RSRC(inode))
	218	inode = HFSPLUS_I(inode)->rsrc_inode;
	219	if (!(file->f_flags & O_LARGEFILE) && i_size_read(inode) > MAX_NON_LFS)
	220	return -EOVERFLOW;
	221	atomic_inc(&HFSPLUS_I(inode)->opencnt);
	222	return 0;
	223	}
	224
	225	static int hfsplus_file_release(struct inode inode, struct file file)
	226	{
	227	struct super_block *sb = inode->i_sb;
	228
	229	if (HFSPLUS_IS_RSRC(inode))
	230	inode = HFSPLUS_I(inode)->rsrc_inode;
	231	if (atomic_dec_and_test(&HFSPLUS_I(inode)->opencnt)) {
	232	inode_lock(inode);
	233	hfsplus_file_truncate(inode);
	234	if (inode->i_flags & S_DEAD) {
	235	hfsplus_delete_cat(inode->i_ino,
	236	HFSPLUS_SB(sb)->hidden_dir, NULL);
	237	hfsplus_delete_inode(inode);
	238	}
	239	inode_unlock(inode);
	240	}
	241	return 0;
	242	}
	243
	244	static int hfsplus_setattr(struct mnt_idmap *idmap,
	245	struct dentry dentry, struct iattr attr)
	246	{
	247	struct inode *inode = d_inode(dentry);
	248	int error;
	249
	250	error = setattr_prepare(&nop_mnt_idmap, dentry, attr);
	251	if (error)
	252	return error;
	253
	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,
	259	attr->ia_size);
	260	if (error)
	261	return error;
	262	}
	263	truncate_setsize(inode, attr->ia_size);
	264	hfsplus_file_truncate(inode);
	265	inode_set_mtime_to_ts(inode, inode_set_ctime_current(inode));
	266	}
	267
	268	setattr_copy(&nop_mnt_idmap, inode, attr);
	269	mark_inode_dirty(inode);
	270
	271	return 0;
	272	}
	273
	274	int hfsplus_getattr(struct mnt_idmap idmap, const struct path path,
	275	struct kstat *stat, u32 request_mask,
	276	unsigned int query_flags)
	277	{
	278	struct inode *inode = d_inode(path->dentry);
	279	struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
	280
	281	if (request_mask & STATX_BTIME) {
	282	stat->result_mask \|= STATX_BTIME;
	283	stat->btime = hfsp_mt2ut(hip->create_date);
	284	}
	285
	286	if (inode->i_flags & S_APPEND)
	287	stat->attributes \|= STATX_ATTR_APPEND;
	288	if (inode->i_flags & S_IMMUTABLE)
	289	stat->attributes \|= STATX_ATTR_IMMUTABLE;
	290	if (hip->userflags & HFSPLUS_FLG_NODUMP)
	291	stat->attributes \|= STATX_ATTR_NODUMP;
	292
	293	stat->attributes_mask \|= STATX_ATTR_APPEND \| STATX_ATTR_IMMUTABLE \|
	294	STATX_ATTR_NODUMP;
	295
	296	generic_fillattr(&nop_mnt_idmap, request_mask, inode, stat);
	297	return 0;
	298	}
	299
	300	int hfsplus_file_fsync(struct file *file, loff_t start, loff_t end,
	301	int datasync)
	302	{
	303	struct inode *inode = file->f_mapping->host;
	304	struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
	305	struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb);
	306	int error = 0, error2;
	307
	308	error = file_write_and_wait_range(file, start, end);
	309	if (error)
	310	return error;
	311	inode_lock(inode);
	312
	313	/*
	314	* Sync inode metadata into the catalog and extent trees.
	315	*/
	316	sync_inode_metadata(inode, 1);
	317
	318	/*
	319	* And explicitly write out the btrees.
	320	*/
	321	if (test_and_clear_bit(HFSPLUS_I_CAT_DIRTY, &hip->flags))
	322	error = filemap_write_and_wait(sbi->cat_tree->inode->i_mapping);
	323
	324	if (test_and_clear_bit(HFSPLUS_I_EXT_DIRTY, &hip->flags)) {
	325	error2 =
	326	filemap_write_and_wait(sbi->ext_tree->inode->i_mapping);
	327	if (!error)
	328	error = error2;
	329	}
	330
	331	if (test_and_clear_bit(HFSPLUS_I_ATTR_DIRTY, &hip->flags)) {
	332	if (sbi->attr_tree) {
	333	error2 =
	334	filemap_write_and_wait(
	335	sbi->attr_tree->inode->i_mapping);
	336	if (!error)
	337	error = error2;
	338	} else {
	339	pr_err("sync non-existent attributes tree\n");
	340	}
	341	}
	342
	343	if (test_and_clear_bit(HFSPLUS_I_ALLOC_DIRTY, &hip->flags)) {
	344	error2 = filemap_write_and_wait(sbi->alloc_file->i_mapping);
	345	if (!error)
	346	error = error2;
	347	}
	348
	349	if (!test_bit(HFSPLUS_SB_NOBARRIER, &sbi->flags))
	350	blkdev_issue_flush(inode->i_sb->s_bdev);
	351
	352	inode_unlock(inode);
	353
	354	return error;
	355	}
	356
	357	static const struct inode_operations hfsplus_file_inode_operations = {
	358	.setattr = hfsplus_setattr,
	359	.getattr = hfsplus_getattr,
	360	.listxattr = hfsplus_listxattr,
	361	.fileattr_get = hfsplus_fileattr_get,
	362	.fileattr_set = hfsplus_fileattr_set,
	363	};
	364
	365	static const struct file_operations hfsplus_file_operations = {
	366	.llseek = generic_file_llseek,
	367	.read_iter = generic_file_read_iter,
	368	.write_iter = generic_file_write_iter,
	369	.mmap = generic_file_mmap,
	370	.splice_read = filemap_splice_read,
	371	.fsync = hfsplus_file_fsync,
	372	.open = hfsplus_file_open,
	373	.release = hfsplus_file_release,
	374	.unlocked_ioctl = hfsplus_ioctl,
	375	};
	376
	377	struct inode hfsplus_new_inode(struct super_block sb, struct inode *dir,
	378	umode_t mode)
	379	{
	380	struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
	381	struct inode *inode = new_inode(sb);
	382	struct hfsplus_inode_info *hip;
	383
	384	if (!inode)
	385	return NULL;
	386
	387	inode->i_ino = sbi->next_cnid++;
	388	inode_init_owner(&nop_mnt_idmap, inode, dir, mode);
	389	set_nlink(inode, 1);
	390	simple_inode_init_ts(inode);
	391
	392	hip = HFSPLUS_I(inode);
	393	INIT_LIST_HEAD(&hip->open_dir_list);
	394	spin_lock_init(&hip->open_dir_lock);
	395	mutex_init(&hip->extents_lock);
	396	atomic_set(&hip->opencnt, 0);
	397	hip->extent_state = 0;
	398	hip->flags = 0;
	399	hip->userflags = 0;
	400	hip->subfolders = 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;
	407	hip->phys_size = 0;
	408	hip->fs_blocks = 0;
	409	hip->rsrc_inode = NULL;
	410	if (S_ISDIR(inode->i_mode)) {
	411	inode->i_size = 2;
	412	sbi->folder_count++;
	413	inode->i_op = &hfsplus_dir_inode_operations;
	414	inode->i_fop = &hfsplus_dir_operations;
	415	} else if (S_ISREG(inode->i_mode)) {
	416	sbi->file_count++;
	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)) {
	422	sbi->file_count++;
	423	inode->i_op = &page_symlink_inode_operations;
	424	inode_nohighmem(inode);
	425	inode->i_mapping->a_ops = &hfsplus_aops;
	426	hip->clump_blocks = 1;
	427	} else
	428	sbi->file_count++;
	429	insert_inode_hash(inode);
	430	mark_inode_dirty(inode);
	431	hfsplus_mark_mdb_dirty(sb);
	432
	433	return inode;
	434	}
	435
	436	void hfsplus_delete_inode(struct inode *inode)
	437	{
	438	struct super_block *sb = inode->i_sb;
	439
	440	if (S_ISDIR(inode->i_mode)) {
	441	HFSPLUS_SB(sb)->folder_count--;
	442	hfsplus_mark_mdb_dirty(sb);
	443	return;
	444	}
	445	HFSPLUS_SB(sb)->file_count--;
	446	if (S_ISREG(inode->i_mode)) {
	447	if (!inode->i_nlink) {
	448	inode->i_size = 0;
	449	hfsplus_file_truncate(inode);
	450	}
	451	} else if (S_ISLNK(inode->i_mode)) {
	452	inode->i_size = 0;
	453	hfsplus_file_truncate(inode);
	454	}
	455	hfsplus_mark_mdb_dirty(sb);
	456	}
	457
	458	void hfsplus_inode_read_fork(struct inode inode, struct hfsplus_fork_raw fork)
	459	{
	460	struct super_block *sb = inode->i_sb;
	461	struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
	462	struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
	463	u32 count;
	464	int i;
	465
	466	memcpy(&hip->first_extents, &fork->extents, sizeof(hfsplus_extent_rec));
	467	for (count = 0, i = 0; i < 8; i++)
	468	count += be32_to_cpu(fork->extents[i].block_count);
	469	hip->first_blocks = count;
	470	memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec));
	471	hip->cached_start = 0;
	472	hip->cached_blocks = 0;
	473
	474	hip->alloc_blocks = be32_to_cpu(fork->total_blocks);
	475	hip->phys_size = inode->i_size = be64_to_cpu(fork->total_size);
	476	hip->fs_blocks =
	477	(inode->i_size + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
	478	inode_set_bytes(inode, hip->fs_blocks << sb->s_blocksize_bits);
	479	hip->clump_blocks =
	480	be32_to_cpu(fork->clump_size) >> sbi->alloc_blksz_shift;
	481	if (!hip->clump_blocks) {
	482	hip->clump_blocks = HFSPLUS_IS_RSRC(inode) ?
	483	sbi->rsrc_clump_blocks :
	484	sbi->data_clump_blocks;
	485	}
	486	}
	487
	488	void hfsplus_inode_write_fork(struct inode *inode,
	489	struct hfsplus_fork_raw *fork)
	490	{
	491	memcpy(&fork->extents, &HFSPLUS_I(inode)->first_extents,
	492	sizeof(hfsplus_extent_rec));
	493	fork->total_size = cpu_to_be64(inode->i_size);
	494	fork->total_blocks = cpu_to_be32(HFSPLUS_I(inode)->alloc_blocks);
	495	}
	496
	497	int hfsplus_cat_read_inode(struct inode inode, struct hfs_find_data fd)
	498	{
	499	hfsplus_cat_entry entry;
	500	int res = 0;
	501	u16 type;
	502
	503	type = hfs_bnode_read_u16(fd->bnode, fd->entryoffset);
	504
	505	HFSPLUS_I(inode)->linkid = 0;
	506	if (type == HFSPLUS_FOLDER) {
	507	struct hfsplus_cat_folder *folder = &entry.folder;
	508
	509	if (fd->entrylength < sizeof(struct hfsplus_cat_folder)) {
	510	pr_err("bad catalog folder entry\n");
	511	res = -EIO;
	512	goto out;
	513	}
	514	hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
	515	sizeof(struct hfsplus_cat_folder));
	516	hfsplus_get_perms(inode, &folder->permissions, 1);
	517	set_nlink(inode, 1);
	518	inode->i_size = 2 + be32_to_cpu(folder->valence);
	519	inode_set_atime_to_ts(inode, hfsp_mt2ut(folder->access_date));
	520	inode_set_mtime_to_ts(inode,
	521	hfsp_mt2ut(folder->content_mod_date));
	522	inode_set_ctime_to_ts(inode,
	523	hfsp_mt2ut(folder->attribute_mod_date));
	524	HFSPLUS_I(inode)->create_date = folder->create_date;
	525	HFSPLUS_I(inode)->fs_blocks = 0;
	526	if (folder->flags & cpu_to_be16(HFSPLUS_HAS_FOLDER_COUNT)) {
	527	HFSPLUS_I(inode)->subfolders =
	528	be32_to_cpu(folder->subfolders);
	529	}
	530	inode->i_op = &hfsplus_dir_inode_operations;
	531	inode->i_fop = &hfsplus_dir_operations;
	532	} else if (type == HFSPLUS_FILE) {
	533	struct hfsplus_cat_file *file = &entry.file;
	534
	535	if (fd->entrylength < sizeof(struct hfsplus_cat_file)) {
	536	pr_err("bad catalog file entry\n");
	537	res = -EIO;
	538	goto out;
	539	}
	540	hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
	541	sizeof(struct hfsplus_cat_file));
	542
	543	hfsplus_inode_read_fork(inode, HFSPLUS_IS_RSRC(inode) ?
	544	&file->rsrc_fork : &file->data_fork);
	545	hfsplus_get_perms(inode, &file->permissions, 0);
	546	set_nlink(inode, 1);
	547	if (S_ISREG(inode->i_mode)) {
	548	if (file->permissions.dev)
	549	set_nlink(inode,
	550	be32_to_cpu(file->permissions.dev));
	551	inode->i_op = &hfsplus_file_inode_operations;
	552	inode->i_fop = &hfsplus_file_operations;
	553	inode->i_mapping->a_ops = &hfsplus_aops;
	554	} else if (S_ISLNK(inode->i_mode)) {
	555	inode->i_op = &page_symlink_inode_operations;
	556	inode_nohighmem(inode);
	557	inode->i_mapping->a_ops = &hfsplus_aops;
	558	} else {
	559	init_special_inode(inode, inode->i_mode,
	560	be32_to_cpu(file->permissions.dev));
	561	}
	562	inode_set_atime_to_ts(inode, hfsp_mt2ut(file->access_date));
	563	inode_set_mtime_to_ts(inode,
	564	hfsp_mt2ut(file->content_mod_date));
	565	inode_set_ctime_to_ts(inode,
	566	hfsp_mt2ut(file->attribute_mod_date));
	567	HFSPLUS_I(inode)->create_date = file->create_date;
	568	} else {
	569	pr_err("bad catalog entry used to create inode\n");
	570	res = -EIO;
	571	}
	572	out:
	573	return res;
	574	}
	575
	576	int hfsplus_cat_write_inode(struct inode *inode)
	577	{
	578	struct inode *main_inode = inode;
	579	struct hfs_find_data fd;
	580	hfsplus_cat_entry entry;
	581	int res = 0;
	582
	583	if (HFSPLUS_IS_RSRC(inode))
	584	main_inode = HFSPLUS_I(inode)->rsrc_inode;
	585
	586	if (!main_inode->i_nlink)
	587	return 0;
	588
	589	if (hfs_find_init(HFSPLUS_SB(main_inode->i_sb)->cat_tree, &fd))
	590	/* panic? */
	591	return -EIO;
	592
	593	if (hfsplus_find_cat(main_inode->i_sb, main_inode->i_ino, &fd))
	594	/* panic? */
	595	goto out;
	596
	597	if (S_ISDIR(main_inode->i_mode)) {
	598	struct hfsplus_cat_folder *folder = &entry.folder;
	599
	600	if (fd.entrylength < sizeof(struct hfsplus_cat_folder)) {
	601	pr_err("bad catalog folder entry\n");
	602	res = -EIO;
	603	goto out;
	604	}
	605	hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
	606	sizeof(struct hfsplus_cat_folder));
	607	/* simple node checks? */
	608	hfsplus_cat_set_perms(inode, &folder->permissions);
	609	folder->access_date = hfsp_ut2mt(inode_get_atime(inode));
	610	folder->content_mod_date = hfsp_ut2mt(inode_get_mtime(inode));
	611	folder->attribute_mod_date = hfsp_ut2mt(inode_get_ctime(inode));
	612	folder->valence = cpu_to_be32(inode->i_size - 2);
	613	if (folder->flags & cpu_to_be16(HFSPLUS_HAS_FOLDER_COUNT)) {
	614	folder->subfolders =
	615	cpu_to_be32(HFSPLUS_I(inode)->subfolders);
	616	}
	617	hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
	618	sizeof(struct hfsplus_cat_folder));
	619	} else if (HFSPLUS_IS_RSRC(inode)) {
	620	struct hfsplus_cat_file *file = &entry.file;
	621	hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
	622	sizeof(struct hfsplus_cat_file));
	623	hfsplus_inode_write_fork(inode, &file->rsrc_fork);
	624	hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
	625	sizeof(struct hfsplus_cat_file));
	626	} else {
	627	struct hfsplus_cat_file *file = &entry.file;
	628
	629	if (fd.entrylength < sizeof(struct hfsplus_cat_file)) {
	630	pr_err("bad catalog file entry\n");
	631	res = -EIO;
	632	goto out;
	633	}
	634	hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
	635	sizeof(struct hfsplus_cat_file));
	636	hfsplus_inode_write_fork(inode, &file->data_fork);
	637	hfsplus_cat_set_perms(inode, &file->permissions);
	638	if (HFSPLUS_FLG_IMMUTABLE &
	639	(file->permissions.rootflags \|
	640	file->permissions.userflags))
	641	file->flags \|= cpu_to_be16(HFSPLUS_FILE_LOCKED);
	642	else
	643	file->flags &= cpu_to_be16(~HFSPLUS_FILE_LOCKED);
	644	file->access_date = hfsp_ut2mt(inode_get_atime(inode));
	645	file->content_mod_date = hfsp_ut2mt(inode_get_mtime(inode));
	646	file->attribute_mod_date = hfsp_ut2mt(inode_get_ctime(inode));
	647	hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
	648	sizeof(struct hfsplus_cat_file));
	649	}
	650
	651	set_bit(HFSPLUS_I_CAT_DIRTY, &HFSPLUS_I(inode)->flags);
	652	out:
	653	hfs_find_exit(&fd);
	654	return res;
	655	}
	656
	657	int hfsplus_fileattr_get(struct dentry dentry, struct fileattr fa)
	658	{
	659	struct inode *inode = d_inode(dentry);
	660	struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
	661	unsigned int flags = 0;
	662
	663	if (inode->i_flags & S_IMMUTABLE)
	664	flags \|= FS_IMMUTABLE_FL;
	665	if (inode->i_flags & S_APPEND)
	666	flags \|= FS_APPEND_FL;
	667	if (hip->userflags & HFSPLUS_FLG_NODUMP)
	668	flags \|= FS_NODUMP_FL;
	669
	670	fileattr_fill_flags(fa, flags);
	671
	672	return 0;
	673	}
	674
	675	int hfsplus_fileattr_set(struct mnt_idmap *idmap,
	676	struct dentry dentry, struct fileattr fa)
	677	{
	678	struct inode *inode = d_inode(dentry);
	679	struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
	680	unsigned int new_fl = 0;
	681
	682	if (fileattr_has_fsx(fa))
	683	return -EOPNOTSUPP;
	684
	685	/* don't silently ignore unsupported ext2 flags */
	686	if (fa->flags & ~(FS_IMMUTABLE_FL\|FS_APPEND_FL\|FS_NODUMP_FL))
	687	return -EOPNOTSUPP;
	688
	689	if (fa->flags & FS_IMMUTABLE_FL)
	690	new_fl \|= S_IMMUTABLE;
	691
	692	if (fa->flags & FS_APPEND_FL)
	693	new_fl \|= S_APPEND;
	694
	695	inode_set_flags(inode, new_fl, S_IMMUTABLE \| S_APPEND);
	696
	697	if (fa->flags & FS_NODUMP_FL)
	698	hip->userflags \|= HFSPLUS_FLG_NODUMP;
	699	else
	700	hip->userflags &= ~HFSPLUS_FLG_NODUMP;
	701
	702	inode_set_ctime_current(inode);
	703	mark_inode_dirty(inode);
	704
	705	return 0;
	706	}