/* SPDX-License-Identifier: GPL-2.0-or-later */
#ifndef _NTFS_STREAM_H
#define _NTFS_STREAM_H

#include <linux/fs.h>

struct ntfs_inode;
struct ntfs_volume;

struct ntfs_stream_path {
	const char *base_name;
	unsigned int base_len;
	const char *stream_name;
	unsigned int stream_len;
};

int ntfs_check_bad_windows_name(struct ntfs_volume *vol,
		const __le16 *name, unsigned int name_len);
int ntfs_check_stream_name(const __le16 *name, unsigned int name_len);

int ntfs_stream_path_parse(struct ntfs_volume *vol,
		const struct qstr *qname, struct ntfs_stream_path *path);
bool ntfs_stream_path_has_colon(struct ntfs_volume *vol,
		const struct qstr *qname);
int ntfs_stream_path_check(struct ntfs_volume *vol,
		const struct qstr *qname);
int ntfs_stream_path_names(struct ntfs_volume *vol,
		const struct qstr *qname, __le16 **base_name, int *base_len,
		__le16 **stream_name, int *stream_len);

struct inode *ntfs_stream_lookup_inode_by_name(struct inode *dir,
		__le16 *name, int name_len);
struct dentry *ntfs_lookup_stream(struct inode *dir, struct dentry *dentry,
		const struct ntfs_stream_path *path);
struct inode *ntfs_create_named_stream(const struct mnt_idmap *idmap,
		struct inode *dir, __le16 *base_name, int base_len,
		__le16 *stream_name, int stream_len);
int ntfs_unlink_named_stream(struct inode *dir, struct dentry *dentry);

void ntfs_set_default_dentry_ops(struct super_block *sb);

void ntfs_stream_inode_refresh(struct inode *inode);
int ntfs_stream_inode_validate(struct inode *inode);
void ntfs_stream_update_base_time(struct ntfs_inode *base_ni);
bool ntfs_stream_unlinked(struct ntfs_inode *base_ni,
		const __le16 *name, u32 name_len);
int ntfs_stream_put(struct inode *inode);
int ntfs_remove_named_stream(struct ntfs_inode *ni, __le16 *name,
		u32 name_len, struct inode *expected_inode);

int ntfs_stream_validate_for_mutation(struct inode *inode, bool nowait);
long ntfs_ioctl_stream_read(struct file *file, unsigned long arg);
long ntfs_ioctl_stream_write(struct file *file, unsigned long arg);
long ntfs_ioctl_stream_remove(struct file *file, unsigned long arg);
int ntfs_ioctl_list_streams(struct file *file, unsigned long arg);

extern const struct file_operations ntfs_stream_file_ops;
extern const struct inode_operations ntfs_stream_inode_ops;

/*
 * Common file operations used by both ordinary files and named streams.
 * Their implementations remain in file.c.
 */
int ntfs_file_open(struct inode *inode, struct file *file);
int ntfs_file_release(struct inode *inode, struct file *file);
int ntfs_file_fsync(struct file *file, loff_t start, loff_t end,
		int datasync);
int ntfs_setattr_size(struct inode *inode, struct iattr *attr);
loff_t ntfs_file_llseek(struct file *file, loff_t offset, int whence);
ssize_t ntfs_file_read_iter(struct kiocb *iocb, struct iov_iter *to);
ssize_t ntfs_file_write_iter(struct kiocb *iocb, struct iov_iter *from);
int ntfs_file_mmap_prepare(struct vm_area_desc *desc);
ssize_t ntfs_file_splice_read(struct file *in, loff_t *ppos,
		struct pipe_inode_info *pipe, size_t len, unsigned int flags);
int ntfs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
		u64 start, u64 len);
long ntfs_fallocate(struct file *file, int mode, loff_t offset, loff_t len);

int ntfs_test_inode_rcu(struct inode *inode, void *data);

#endif /* _NTFS_STREAM_H */