sched.h (6286B) - Raw
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 /* Flags for the clone3() syscall. */ 37 #define CLONE_CLEAR_SIGHAND 0x100000000ULL /* Clear any signal handler and reset to SIG_DFL. */ 38 #define CLONE_INTO_CGROUP 0x200000000ULL /* Clone into a specific cgroup given the right permissions. */ 39 40 /* 41 * cloning flags intersect with CSIGNAL so can be used with unshare and clone3 42 * syscalls only: 43 */ 44 #define CLONE_NEWTIME 0x00000080 /* New time namespace */ 45 46 #ifndef __ASSEMBLY__ 47 /** 48 * struct clone_args - arguments for the clone3 syscall 49 * @flags: Flags for the new process as listed above. 50 * All flags are valid except for CSIGNAL and 51 * CLONE_DETACHED. 52 * @pidfd: If CLONE_PIDFD is set, a pidfd will be 53 * returned in this argument. 54 * @child_tid: If CLONE_CHILD_SETTID is set, the TID of the 55 * child process will be returned in the child's 56 * memory. 57 * @parent_tid: If CLONE_PARENT_SETTID is set, the TID of 58 * the child process will be returned in the 59 * parent's memory. 60 * @exit_signal: The exit_signal the parent process will be 61 * sent when the child exits. 62 * @stack: Specify the location of the stack for the 63 * child process. 64 * Note, @stack is expected to point to the 65 * lowest address. The stack direction will be 66 * determined by the kernel and set up 67 * appropriately based on @stack_size. 68 * @stack_size: The size of the stack for the child process. 69 * @tls: If CLONE_SETTLS is set, the tls descriptor 70 * is set to tls. 71 * @set_tid: Pointer to an array of type *pid_t. The size 72 * of the array is defined using @set_tid_size. 73 * This array is used to select PIDs/TIDs for 74 * newly created processes. The first element in 75 * this defines the PID in the most nested PID 76 * namespace. Each additional element in the array 77 * defines the PID in the parent PID namespace of 78 * the original PID namespace. If the array has 79 * less entries than the number of currently 80 * nested PID namespaces only the PIDs in the 81 * corresponding namespaces are set. 82 * @set_tid_size: This defines the size of the array referenced 83 * in @set_tid. This cannot be larger than the 84 * kernel's limit of nested PID namespaces. 85 * @cgroup: If CLONE_INTO_CGROUP is specified set this to 86 * a file descriptor for the cgroup. 87 * 88 * The structure is versioned by size and thus extensible. 89 * New struct members must go at the end of the struct and 90 * must be properly 64bit aligned. 91 */ 92 struct clone_args { 93 __aligned_u64 flags; 94 __aligned_u64 pidfd; 95 __aligned_u64 child_tid; 96 __aligned_u64 parent_tid; 97 __aligned_u64 exit_signal; 98 __aligned_u64 stack; 99 __aligned_u64 stack_size; 100 __aligned_u64 tls; 101 __aligned_u64 set_tid; 102 __aligned_u64 set_tid_size; 103 __aligned_u64 cgroup; 104 }; 105 #endif 106 107 #define CLONE_ARGS_SIZE_VER0 64 /* sizeof first published struct */ 108 #define CLONE_ARGS_SIZE_VER1 80 /* sizeof second published struct */ 109 #define CLONE_ARGS_SIZE_VER2 88 /* sizeof third published struct */ 110 111 /* 112 * Scheduling policies 113 */ 114 #define SCHED_NORMAL 0 115 #define SCHED_FIFO 1 116 #define SCHED_RR 2 117 #define SCHED_BATCH 3 118 /* SCHED_ISO: reserved but not implemented yet */ 119 #define SCHED_IDLE 5 120 #define SCHED_DEADLINE 6 121 #define SCHED_EXT 7 122 123 /* Can be ORed in to make sure the process is reverted back to SCHED_NORMAL on fork */ 124 #define SCHED_RESET_ON_FORK 0x40000000 125 126 /* 127 * For the sched_{set,get}attr() calls 128 */ 129 #define SCHED_FLAG_RESET_ON_FORK 0x01 130 #define SCHED_FLAG_RECLAIM 0x02 131 #define SCHED_FLAG_DL_OVERRUN 0x04 132 #define SCHED_FLAG_KEEP_POLICY 0x08 133 #define SCHED_FLAG_KEEP_PARAMS 0x10 134 #define SCHED_FLAG_UTIL_CLAMP_MIN 0x20 135 #define SCHED_FLAG_UTIL_CLAMP_MAX 0x40 136 137 #define SCHED_FLAG_KEEP_ALL (SCHED_FLAG_KEEP_POLICY | \ 138 SCHED_FLAG_KEEP_PARAMS) 139 140 #define SCHED_FLAG_UTIL_CLAMP (SCHED_FLAG_UTIL_CLAMP_MIN | \ 141 SCHED_FLAG_UTIL_CLAMP_MAX) 142 143 #define SCHED_FLAG_ALL (SCHED_FLAG_RESET_ON_FORK | \ 144 SCHED_FLAG_RECLAIM | \ 145 SCHED_FLAG_DL_OVERRUN | \ 146 SCHED_FLAG_KEEP_ALL | \ 147 SCHED_FLAG_UTIL_CLAMP) 148 149 #endif /* _LINUX_SCHED_H */