/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_PID_FS_H
#define _LINUX_PID_FS_H

#include <linux/gfp_types.h>
#include <linux/pid.h>

struct coredump_params;

struct file *pidfs_alloc_file(struct pid *pid, unsigned int flags);
void __init pidfs_init(void);
void pidfs_prepare_pid(struct pid *pid);
int pidfs_add_pid(struct pid *pid);
void pidfs_remove_pid(struct pid *pid);
void pidfs_exit(struct task_struct *tsk);
#ifdef CONFIG_COREDUMP
void pidfs_coredump(const struct coredump_params *cprm);
#endif
extern const struct dentry_operations pidfs_dentry_operations;
int pidfs_register_pid_gfp(struct pid *pid, gfp_t gfp);

/**
 * pidfs_register_pid - register a struct pid in pidfs
 * @pid: pid to pin
 *
 * Register a struct pid in pidfs.
 *
 * Return: On success zero, on error a negative error code is returned.
 */
static inline int pidfs_register_pid(struct pid *pid)
{
	return pidfs_register_pid_gfp(pid, GFP_KERNEL);
}

void pidfs_free_pid(struct pid *pid);
int __pidfs_register_pids(struct pid *const *pids, enum pid_type last);

/* Register the pids of an array declared with DECLARE_PIDS(). */
#define pidfs_register_pids(pids)	__pidfs_register_pids(pids, pids_last(pids))

#endif /* _LINUX_PID_FS_H */