/*      $NetBSD: linux_sched.h,v 1.11 2024/09/28 19:35:56 christos Exp $        */

/*-
* Copyright (c) 1999 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
* NASA Ames Research Center.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/

#ifndef _LINUX_SCHED_H
#define _LINUX_SCHED_H

/*
* Flags passed to the Linux __clone(2) system call.
*/
#define LINUX_CLONE_CSIGNAL     0x000000ff      /* signal to be sent at exit */
#define LINUX_CLONE_VM          0x00000100      /* share address space */
#define LINUX_CLONE_FS          0x00000200      /* share "file system" info */
#define LINUX_CLONE_FILES       0x00000400      /* share file descriptors */
#define LINUX_CLONE_SIGHAND     0x00000800      /* share signal actions */
#define LINUX_CLONE_PID         0x00001000      /* share process ID */
#define LINUX_CLONE_PTRACE      0x00002000      /* ptrace(2) continues on
                                                  child */
#define LINUX_CLONE_VFORK       0x00004000      /* parent blocks until child
                                                  exits */
#define LINUX_CLONE_PARENT      0x00008000      /* want same parent as cloner */
#define LINUX_CLONE_THREAD      0x00010000      /* same thread group */
#define LINUX_CLONE_NEWNS       0x00020000      /* new namespace group */
#define LINUX_CLONE_SYSVSEM     0x00040000      /* share SysV SEM_UNDO */
#define LINUX_CLONE_SETTLS      0x00080000      /* create new TLS for child */
#define LINUX_CLONE_PARENT_SETTID \
                               0x00100000      /* set TID in the parent */
#define LINUX_CLONE_CHILD_CLEARTID \
                               0x00200000      /* clear TID in the child */
#define LINUX_CLONE_DETACHED    0x00400000      /* unused */
#define LINUX_CLONE_UNTRACED    0x00800000      /* set if parent cannot force CLONE_PTRACE */
#define LINUX_CLONE_CHILD_SETTID \
                               0x01000000      /* set TID in the child */
#define LINUX_CLONE_STOPPED     0x02000000      /* start in stopped state */

/*
* Flags that clone supports but are yet to be supported in NetBSD
*/

#define LINUX_CLONE_PIDFD               0x00001000      /* since Linux 5.2 */
#define LINUX_CLONE_NEWCGROUP           0x02000000      /* New cgroup NS */
#define LINUX_CLONE_NEWUTS              0x04000000
#define LINUX_CLONE_NEWIPC              0x08000000
#define LINUX_CLONE_NEWUSER             0x10000000
#define LINUX_CLONE_NEWPID              0x20000000
#define LINUX_CLONE_NEWNET              0x40000000
#define LINUX_CLONE_IO                  0x80000000

/* Flags for the clone3() syscall. */
#define LINUX_CLONE_CLEAR_SIGHAND       0x100000000ULL
#define LINUX_CLONE_INTO_CGROUP         0x200000000ULL
#define LINUX_CLONE_NEWTIME             0x00000080

#define LINUX_CLONE_LEGACY_FLAGS        0xffffffffULL

#define LINUX_CLONE_ALLOWED_FLAGS ( \
   LINUX_CLONE_VM | LINUX_CLONE_FS | LINUX_CLONE_FILES | \
   LINUX_CLONE_SIGHAND | LINUX_CLONE_THREAD | LINUX_CLONE_VFORK | \
   LINUX_CLONE_PARENT_SETTID | LINUX_CLONE_CHILD_CLEARTID | \
   LINUX_CLONE_CHILD_SETTID | LINUX_CLONE_SETTLS)

#define LINUX_CLONE_UNIMPLEMENTED_FLAGS ( \
   LINUX_CLONE_NEWNS | LINUX_CLONE_NEWUTS | LINUX_CLONE_NEWIPC | \
   LINUX_CLONE_NEWUSER | LINUX_CLONE_NEWPID | LINUX_CLONE_NEWNET | \
   LINUX_CLONE_PIDFD)

#define LINUX_CSIGNAL                   0x000000ff
struct linux_sched_param {
       int     sched_priority;
};

#define LINUX_SCHED_OTHER       0
#define LINUX_SCHED_FIFO        1
#define LINUX_SCHED_RR          2

struct linux_timespec {
       linux_time_t    tv_sec;         /* seconds */
       long            tv_nsec;        /* nanoseconds */
};

struct linux_itimerspec {
       struct linux_timespec it_interval;
       struct linux_timespec it_value;
};

struct linux_user_clone3_args {
       uint64_t flags;        /* Flags bit mask */
       uint64_t pidfd;        /* Where to store PID file descriptor (int *) */
       uint64_t child_tid;    /* Where to store child TID, in child's memory
                                 (pid_t *) */
       uint64_t parent_tid;   /* Where to store child TID, in parent's memory
                                 (pid_t *) */
       uint64_t exit_signal;  /* Signal to deliver to parent on child
                                 termination */
       uint64_t stack;        /* Pointer to lowest byte of stack */
       uint64_t stack_size;   /* Size of stack */
       uint64_t tls;          /* Location of new TLS */
       uint64_t set_tid;      /* Pointer to a pid_t array (since Linux 5.5) */
       uint64_t set_tid_size; /* Number of elements in set_tid (since Linux
                                 5.5) */
       uint64_t cgroup;       /* File descriptor for target cgroup of child
                                 (since Linux 5.7) */
};


#define LINUX_CLOCK_REALTIME            0
#define LINUX_CLOCK_MONOTONIC           1
#define LINUX_CLOCK_PROCESS_CPUTIME_ID  2
#define LINUX_CLOCK_THREAD_CPUTIME_ID   3
#define LINUX_CLOCK_MONOTONIC_RAW       4
#define LINUX_CLOCK_REALTIME_COARSE     5
#define LINUX_CLOCK_MONOTONIC_COARSE    6
#define LINUX_CLOCK_BOOTTIME            7
#define LINUX_CLOCK_BOOTTIME_ALARM      8
#define LINUX_CLOCK_REALTIME_ALARM      9

#define LINUX_TIMER_ABSTIME             0x01

int     linux_to_native_clockid(clockid_t *, clockid_t);

void    native_to_linux_timespec(struct linux_timespec *,
           const struct timespec *);
void    linux_to_native_timespec(struct timespec *,
           const struct linux_timespec *);

void    native_to_linux_itimerspec(struct linux_itimerspec *,
           const struct itimerspec *);
void    linux_to_native_itimerspec(struct itimerspec *,
           const struct linux_itimerspec *);

int     linux_to_native_timer_create_clockid(clockid_t *, clockid_t);

int     linux_to_native_timerfd_settime_flags(int *, int);

#endif /* _LINUX_SCHED_H */

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