criu/include/files.h

#ifndef FILES_H_
#define FILES_H_

#include "compiler.h"
#include "types.h"
#include "lock.h"
#include "list.h"
#include "image.h"

struct fd_parms {
	int		fd;
	unsigned long	pos;
	unsigned int	flags;
	char		fd_flags;
	struct stat	stat;
	pid_t		pid;
	fown_t		fown;
};

enum fdinfo_states {
	FD_STATE_PREP,		/* Create unix sockets */
	FD_STATE_CREATE,	/* Create and send fd */
	FD_STATE_RECV,		/* Receive fd */

	FD_STATE_MAX
};

struct file_desc;

struct fdinfo_list_entry {
	struct list_head	desc_list;
	struct file_desc	*desc;
	struct list_head	ps_list;
	int			pid;
	futex_t			real_pid;
	struct fdinfo_entry	fe;
};

struct file_desc_ops {
	int type;
	int (*open)(struct file_desc *);
	int (*want_transport)(struct fdinfo_entry *, struct file_desc *);
};

struct file_desc {
	u32 id;
	struct list_head hash;
	struct list_head fd_info_head;
	struct file_desc_ops *ops;
};

struct fdtype_ops {
	unsigned int	type;
	u32		(*make_gen_id)(const struct fd_parms *p);
	int		(*dump)(int lfd, u32 id, const struct fd_parms *p);
};

extern u32 make_gen_id(const struct fd_parms *p);
struct cr_fdset;
extern int do_dump_gen_file(struct fd_parms *p, int lfd,
		const struct fdtype_ops *ops, const struct cr_fdset *cr_fdset);

extern void file_desc_add(struct file_desc *d, u32 id, struct file_desc_ops *ops);
extern struct fdinfo_list_entry *file_master(struct file_desc *d);
extern struct file_desc *find_file_desc_raw(int type, u32 id);
extern int send_fd_to_peer(int fd, struct fdinfo_list_entry *, int transport);
extern int restore_fown(int fd, fown_t *fown);
int rst_file_params(int fd, fown_t *fown, int flags);

void show_saved_files(void);
extern int collect_reg_files(void);
struct pstree_item;
extern int prepare_fds(struct pstree_item *);
struct rst_info;
extern int prepare_fd_pid(int pid, struct rst_info *);
extern int prepare_shared_fdinfo(void);
extern int get_filemap_fd(int pid, struct vma_entry *vma_entry);
extern int prepare_fs(int pid);
extern int open_reg_by_id(u32 id);
int set_fd_flags(int fd, int flags);

extern int self_exe_fd;

void clear_ghost_files(void);

#endif /* FILES_H_ */