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1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2#ifndef _UAPI_LINUX_SCHED_H
3#define _UAPI_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/* Flags for the clone3() syscall. */
37#define CLONE_CLEAR_SIGHAND 0x100000000ULL /* Clear any signal handler and reset to SIG_DFL. */
38
39#ifndef __ASSEMBLY__
40/**
41 * struct clone_args - arguments for the clone3 syscall
42 * @flags: Flags for the new process as listed above.
43 * All flags are valid except for CSIGNAL and
44 * CLONE_DETACHED.
45 * @pidfd: If CLONE_PIDFD is set, a pidfd will be
46 * returned in this argument.
47 * @child_tid: If CLONE_CHILD_SETTID is set, the TID of the
48 * child process will be returned in the child's
49 * memory.
50 * @parent_tid: If CLONE_PARENT_SETTID is set, the TID of
51 * the child process will be returned in the
52 * parent's memory.
53 * @exit_signal: The exit_signal the parent process will be
54 * sent when the child exits.
55 * @stack: Specify the location of the stack for the
56 * child process.
57 * Note, @stack is expected to point to the
58 * lowest address. The stack direction will be
59 * determined by the kernel and set up
60 * appropriately based on @stack_size.
61 * @stack_size: The size of the stack for the child process.
62 * @tls: If CLONE_SETTLS is set, the tls descriptor
63 * is set to tls.
64 * @set_tid: Pointer to an array of type *pid_t. The size
65 * of the array is defined using @set_tid_size.
66 * This array is used to select PIDs/TIDs for
67 * newly created processes. The first element in
68 * this defines the PID in the most nested PID
69 * namespace. Each additional element in the array
70 * defines the PID in the parent PID namespace of
71 * the original PID namespace. If the array has
72 * less entries than the number of currently
73 * nested PID namespaces only the PIDs in the
74 * corresponding namespaces are set.
75 * @set_tid_size: This defines the size of the array referenced
76 * in @set_tid. This cannot be larger than the
77 * kernel's limit of nested PID namespaces.
78 *
79 * The structure is versioned by size and thus extensible.
80 * New struct members must go at the end of the struct and
81 * must be properly 64bit aligned.
82 */
83struct clone_args {
84 __aligned_u64 flags;
85 __aligned_u64 pidfd;
86 __aligned_u64 child_tid;
87 __aligned_u64 parent_tid;
88 __aligned_u64 exit_signal;
89 __aligned_u64 stack;
90 __aligned_u64 stack_size;
91 __aligned_u64 tls;
92 __aligned_u64 set_tid;
93 __aligned_u64 set_tid_size;
94};
95#endif
96
97#define CLONE_ARGS_SIZE_VER0 64 /* sizeof first published struct */
98#define CLONE_ARGS_SIZE_VER1 80 /* sizeof second published struct */
99
100/*
101 * Scheduling policies
102 */
103#define SCHED_NORMAL 0
104#define SCHED_FIFO 1
105#define SCHED_RR 2
106#define SCHED_BATCH 3
107/* SCHED_ISO: reserved but not implemented yet */
108#define SCHED_IDLE 5
109#define SCHED_DEADLINE 6
110
111/* Can be ORed in to make sure the process is reverted back to SCHED_NORMAL on fork */
112#define SCHED_RESET_ON_FORK 0x40000000
113
114/*
115 * For the sched_{set,get}attr() calls
116 */
117#define SCHED_FLAG_RESET_ON_FORK 0x01
118#define SCHED_FLAG_RECLAIM 0x02
119#define SCHED_FLAG_DL_OVERRUN 0x04
120#define SCHED_FLAG_KEEP_POLICY 0x08
121#define SCHED_FLAG_KEEP_PARAMS 0x10
122#define SCHED_FLAG_UTIL_CLAMP_MIN 0x20
123#define SCHED_FLAG_UTIL_CLAMP_MAX 0x40
124
125#define SCHED_FLAG_KEEP_ALL (SCHED_FLAG_KEEP_POLICY | \
126 SCHED_FLAG_KEEP_PARAMS)
127
128#define SCHED_FLAG_UTIL_CLAMP (SCHED_FLAG_UTIL_CLAMP_MIN | \
129 SCHED_FLAG_UTIL_CLAMP_MAX)
130
131#define SCHED_FLAG_ALL (SCHED_FLAG_RESET_ON_FORK | \
132 SCHED_FLAG_RECLAIM | \
133 SCHED_FLAG_DL_OVERRUN | \
134 SCHED_FLAG_KEEP_ALL | \
135 SCHED_FLAG_UTIL_CLAMP)
136
137#endif /* _UAPI_LINUX_SCHED_H */