#ifndef __LINUX_UMH_H__
#define __LINUX_UMH_H__

#include <linux/gfp.h>
#include <linux/stddef.h>
#include <linux/errno.h>
#include <linux/compiler.h>
#include <linux/workqueue.h>
#include <linux/sysctl.h>

struct cred;
struct file;

#define UMH_NO_WAIT    0x00    /* don't wait at all */
#define UMH_WAIT_EXEC    0x01    /* wait for the exec, but not the process */
#define UMH_WAIT_PROC    0x02    /* wait for the process to complete */
#define UMH_KILLABLE    0x04    /* wait for EXEC/PROC killable */
#define UMH_FREEZABLE    0x08    /* wait for EXEC/PROC freezable */

struct subprocess_info {
    struct work_struct work;
    struct completion *complete;
    const char *path;
#if defined(CONFIG_GRKERNSEC) && !defined(CONFIG_STATIC_USERMODEHELPER)
    const char *origpath;
#endif
    char **argv;
    char **envp;
    int wait;
    int retval;
    int (*init)(struct subprocess_info *info, struct cred *new);
    void (*cleanup)(struct subprocess_info *info);
    void *data;
#if defined(CONFIG_PAX_KERNSEAL) && !defined(CONFIG_LOCKDEP)
} __randomize_layout __mutable_const;
#else
} __randomize_layout;
#endif

extern int
call_usermodehelper(const char *path, char **argv, char **envp, int wait) __nolocal_arg(1, 2, 3);

extern struct subprocess_info *
call_usermodehelper_setup(const char *path, char **argv, char **envp,
              gfp_t gfp_mask,
              int (*init)(struct subprocess_info *info, struct cred *new),
              void (*cleanup)(struct subprocess_info *), void *data) __nolocal_arg(1, 2, 3, 7);

extern int
call_usermodehelper_exec(struct subprocess_info *info, int wait);

enum umh_disable_depth {
    UMH_ENABLED = 0,
    UMH_FREEZING,
    UMH_DISABLED,
};

extern int __usermodehelper_disable(enum umh_disable_depth depth);
extern void __usermodehelper_set_disable_depth(enum umh_disable_depth depth);

static inline int usermodehelper_disable(void)
{
    return __usermodehelper_disable(UMH_DISABLED);
}

static inline void usermodehelper_enable(void)
{
    __usermodehelper_set_disable_depth(UMH_ENABLED);
}

extern int usermodehelper_read_trylock(void);
extern long usermodehelper_read_lock_wait(long timeout);
extern void usermodehelper_read_unlock(void);

#endif /* __LINUX_UMH_H__ */