1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2#ifndef _LINUX_SCHED_H
3#define _LINUX_SCHED_H
4
5#include <linux/types.h>
6
7/*
8 * cloning flags:
9 */
10#define CSIGNAL 0x000000ff /* signal mask to be sent at exit */
11#define CLONE_VM 0x00000100 /* set if VM shared between processes */
12#define CLONE_FS 0x00000200 /* set if fs info shared between processes */
13#define CLONE_FILES 0x00000400 /* set if open files shared between processes */
14#define CLONE_SIGHAND 0x00000800 /* set if signal handlers and blocked signals shared */
15#define CLONE_PIDFD 0x00001000 /* set if a pidfd should be placed in parent */
16#define CLONE_PTRACE 0x00002000 /* set if we want to let tracing continue on the child too */
17#define CLONE_VFORK 0x00004000 /* set if the parent wants the child to wake it up on mm_release */
18#define CLONE_PARENT 0x00008000 /* set if we want to have the same parent as the cloner */
19#define CLONE_THREAD 0x00010000 /* Same thread group? */
20#define CLONE_NEWNS 0x00020000 /* New mount namespace group */
21#define CLONE_SYSVSEM 0x00040000 /* share system V SEM_UNDO semantics */
22#define CLONE_SETTLS 0x00080000 /* create a new TLS for the child */
23#define CLONE_PARENT_SETTID 0x00100000 /* set the TID in the parent */
24#define CLONE_CHILD_CLEARTID 0x00200000 /* clear the TID in the child */
25#define CLONE_DETACHED 0x00400000 /* Unused, ignored */
26#define CLONE_UNTRACED 0x00800000 /* set if the tracing process can't force CLONE_PTRACE on this clone */
27#define CLONE_CHILD_SETTID 0x01000000 /* set the TID in the child */
28#define CLONE_NEWCGROUP 0x02000000 /* New cgroup namespace */
29#define CLONE_NEWUTS 0x04000000 /* New utsname namespace */
30#define CLONE_NEWIPC 0x08000000 /* New ipc namespace */
31#define CLONE_NEWUSER 0x10000000 /* New user namespace */
32#define CLONE_NEWPID 0x20000000 /* New pid namespace */
33#define CLONE_NEWNET 0x40000000 /* New network namespace */
34#define CLONE_IO 0x80000000 /* Clone io context */
35
36#ifndef __ASSEMBLY__
37/**
38 * struct clone_args - arguments for the clone3 syscall
39 * @flags: Flags for the new process as listed above.
40 * All flags are valid except for CSIGNAL and
41 * CLONE_DETACHED.
42 * @pidfd: If CLONE_PIDFD is set, a pidfd will be
43 * returned in this argument.
44 * @child_tid: If CLONE_CHILD_SETTID is set, the TID of the
45 * child process will be returned in the child's
46 * memory.
47 * @parent_tid: If CLONE_PARENT_SETTID is set, the TID of
48 * the child process will be returned in the
49 * parent's memory.
50 * @exit_signal: The exit_signal the parent process will be
51 * sent when the child exits.
52 * @stack: Specify the location of the stack for the
53 * child process.
54 * Note, @stack is expected to point to the
55 * lowest address. The stack direction will be
56 * determined by the kernel and set up
57 * appropriately based on @stack_size.
58 * @stack_size: The size of the stack for the child process.
59 * @tls: If CLONE_SETTLS is set, the tls descriptor
60 * is set to tls.
61 *
62 * The structure is versioned by size and thus extensible.
63 * New struct members must go at the end of the struct and
64 * must be properly 64bit aligned.
65 */
66struct clone_args {
67 __aligned_u64 flags;
68 __aligned_u64 pidfd;
69 __aligned_u64 child_tid;
70 __aligned_u64 parent_tid;
71 __aligned_u64 exit_signal;
72 __aligned_u64 stack;
73 __aligned_u64 stack_size;
74 __aligned_u64 tls;
75};
76#endif
77
78#define CLONE_ARGS_SIZE_VER0 64 /* sizeof first published struct */
79
80/*
81 * Scheduling policies
82 */
83#define SCHED_NORMAL 0
84#define SCHED_FIFO 1
85#define SCHED_RR 2
86#define SCHED_BATCH 3
87/* SCHED_ISO: reserved but not implemented yet */
88#define SCHED_IDLE 5
89#define SCHED_DEADLINE 6
90
91/* Can be ORed in to make sure the process is reverted back to SCHED_NORMAL on fork */
92#define SCHED_RESET_ON_FORK 0x40000000
93
94/*
95 * For the sched_{set,get}attr() calls
96 */
97#define SCHED_FLAG_RESET_ON_FORK 0x01
98#define SCHED_FLAG_RECLAIM 0x02
99#define SCHED_FLAG_DL_OVERRUN 0x04
100#define SCHED_FLAG_KEEP_POLICY 0x08
101#define SCHED_FLAG_KEEP_PARAMS 0x10
102#define SCHED_FLAG_UTIL_CLAMP_MIN 0x20
103#define SCHED_FLAG_UTIL_CLAMP_MAX 0x40
104
105#define SCHED_FLAG_KEEP_ALL (SCHED_FLAG_KEEP_POLICY | \
106 SCHED_FLAG_KEEP_PARAMS)
107
108#define SCHED_FLAG_UTIL_CLAMP (SCHED_FLAG_UTIL_CLAMP_MIN | \
109 SCHED_FLAG_UTIL_CLAMP_MAX)
110
111#define SCHED_FLAG_ALL (SCHED_FLAG_RESET_ON_FORK | \
112 SCHED_FLAG_RECLAIM | \
113 SCHED_FLAG_DL_OVERRUN | \
114 SCHED_FLAG_KEEP_ALL | \
115 SCHED_FLAG_UTIL_CLAMP)
116
117#endif /* _LINUX_SCHED_H */
118

source code of include/linux/sched.h