init_task.h 6.3 KB
Newer Older
L
Linus Torvalds 已提交
1 2 3
#ifndef _LINUX__INIT_TASK_H
#define _LINUX__INIT_TASK_H

4
#include <linux/rcupdate.h>
5
#include <linux/irqflags.h>
6
#include <linux/utsname.h>
I
Ingo Molnar 已提交
7
#include <linux/lockdep.h>
8
#include <linux/ftrace.h>
K
Kirill Korotaev 已提交
9
#include <linux/ipc.h>
C
Cedric Le Goater 已提交
10
#include <linux/pid_namespace.h>
11
#include <linux/user_namespace.h>
12
#include <linux/securebits.h>
13
#include <linux/seqlock.h>
14
#include <net/net_namespace.h>
15
#include <linux/sched/rt.h>
L
Linus Torvalds 已提交
16

17 18 19 20 21 22 23
#ifdef CONFIG_SMP
# define INIT_PUSHABLE_TASKS(tsk)					\
	.pushable_tasks = PLIST_NODE_INIT(tsk.pushable_tasks, MAX_PRIO),
#else
# define INIT_PUSHABLE_TASKS(tsk)
#endif

A
Al Viro 已提交
24
extern struct files_struct init_files;
A
Al Viro 已提交
25
extern struct fs_struct init_fs;
L
Linus Torvalds 已提交
26

27
#ifdef CONFIG_CGROUPS
28 29
#define INIT_GROUP_RWSEM(sig)						\
	.group_rwsem = __RWSEM_INITIALIZER(sig.group_rwsem),
30
#else
31
#define INIT_GROUP_RWSEM(sig)
32 33
#endif

34 35 36 37 38 39 40
#ifdef CONFIG_CPUSETS
#define INIT_CPUSET_SEQ							\
	.mems_allowed_seq = SEQCNT_ZERO,
#else
#define INIT_CPUSET_SEQ
#endif

41
#define INIT_SIGNALS(sig) {						\
42
	.nr_threads	= 1,						\
L
Linus Torvalds 已提交
43
	.wait_chldexit	= __WAIT_QUEUE_HEAD_INITIALIZER(sig.wait_chldexit),\
44
	.shared_pending	= { 						\
L
Linus Torvalds 已提交
45
		.list = LIST_HEAD_INIT(sig.shared_pending.list),	\
46
		.signal =  {{0}}},					\
L
Linus Torvalds 已提交
47 48 49
	.posix_timers	 = LIST_HEAD_INIT(sig.posix_timers),		\
	.cpu_timers	= INIT_CPU_TIMERS(sig.cpu_timers),		\
	.rlim		= INIT_RLIMITS,					\
50 51 52
	.cputimer	= { 						\
		.cputime = INIT_CPUTIME,				\
		.running = 0,						\
53
		.lock = __RAW_SPIN_LOCK_UNLOCKED(sig.cputimer.lock),	\
54
	},								\
55 56
	.cred_guard_mutex =						\
		 __MUTEX_INITIALIZER(sig.cred_guard_mutex),		\
57
	INIT_GROUP_RWSEM(sig)						\
L
Linus Torvalds 已提交
58 59
}

S
Serge E. Hallyn 已提交
60 61
extern struct nsproxy init_nsproxy;

L
Linus Torvalds 已提交
62 63
#define INIT_SIGHAND(sighand) {						\
	.count		= ATOMIC_INIT(1), 				\
64
	.action		= { { { .sa_handler = SIG_DFL, } }, },		\
65
	.siglock	= __SPIN_LOCK_UNLOCKED(sighand.siglock),	\
D
Davide Libenzi 已提交
66
	.signalfd_wqh	= __WAIT_QUEUE_HEAD_INITIALIZER(sighand.signalfd_wqh),	\
L
Linus Torvalds 已提交
67 68 69 70
}

extern struct group_info init_groups;

71 72 73
#define INIT_STRUCT_PID {						\
	.count 		= ATOMIC_INIT(1),				\
	.tasks		= {						\
74 75 76
		{ .first = NULL },					\
		{ .first = NULL },					\
		{ .first = NULL },					\
77
	},								\
78 79 80 81 82 83
	.level		= 0,						\
	.numbers	= { {						\
		.nr		= 0,					\
		.ns		= &init_pid_ns,				\
		.pid_chain	= { .next = NULL, .pprev = NULL },	\
	}, }								\
84 85 86 87 88 89
}

#define INIT_PID_LINK(type) 					\
{								\
	.node = {						\
		.next = NULL,					\
90
		.pprev = NULL,					\
91 92 93 94
	},							\
	.pid = &init_struct_pid,				\
}

A
Al Viro 已提交
95 96
#ifdef CONFIG_AUDITSYSCALL
#define INIT_IDS \
97
	.loginuid = INVALID_UID, \
98
	.sessionid = -1,
A
Al Viro 已提交
99 100 101
#else
#define INIT_IDS
#endif
102

103 104 105 106 107 108
#ifdef CONFIG_RCU_BOOST
#define INIT_TASK_RCU_BOOST()						\
	.rcu_boost_mutex = NULL,
#else
#define INIT_TASK_RCU_BOOST()
#endif
109
#ifdef CONFIG_TREE_PREEMPT_RCU
P
Paul E. McKenney 已提交
110 111 112 113 114 115
#define INIT_TASK_RCU_TREE_PREEMPT()					\
	.rcu_blocked_node = NULL,
#else
#define INIT_TASK_RCU_TREE_PREEMPT(tsk)
#endif
#ifdef CONFIG_PREEMPT_RCU
116 117 118
#define INIT_TASK_RCU_PREEMPT(tsk)					\
	.rcu_read_lock_nesting = 0,					\
	.rcu_read_unlock_special = 0,					\
P
Paul E. McKenney 已提交
119
	.rcu_node_entry = LIST_HEAD_INIT(tsk.rcu_node_entry),		\
120 121
	INIT_TASK_RCU_TREE_PREEMPT()					\
	INIT_TASK_RCU_BOOST()
122 123 124 125
#else
#define INIT_TASK_RCU_PREEMPT(tsk)
#endif

126 127
extern struct cred init_cred;

P
Peter Zijlstra 已提交
128 129 130 131 132 133 134 135 136
extern struct task_group root_task_group;

#ifdef CONFIG_CGROUP_SCHED
# define INIT_CGROUP_SCHED(tsk)						\
	.sched_task_group = &root_task_group,
#else
# define INIT_CGROUP_SCHED(tsk)
#endif

137
#ifdef CONFIG_PERF_EVENTS
P
Peter Zijlstra 已提交
138
# define INIT_PERF_EVENTS(tsk)						\
139 140 141
	.perf_event_mutex = 						\
		 __MUTEX_INITIALIZER(tsk.perf_event_mutex),		\
	.perf_event_list = LIST_HEAD_INIT(tsk.perf_event_list),
142
#else
143
# define INIT_PERF_EVENTS(tsk)
144 145
#endif

146 147 148 149 150 151 152 153 154
#ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN
# define INIT_VTIME(tsk)						\
	.vtime_seqlock = __SEQLOCK_UNLOCKED(tsk.vtime_seqlock),	\
	.vtime_snap = 0,				\
	.vtime_snap_whence = VTIME_SYS,
#else
# define INIT_VTIME(tsk)
#endif

155 156
#define INIT_TASK_COMM "swapper"

L
Linus Torvalds 已提交
157 158 159 160 161 162 163
/*
 *  INIT_TASK is used to set up the first task table, touch at
 * your own risk!. Base=0, limit=0x1fffff (=2MB)
 */
#define INIT_TASK(tsk)	\
{									\
	.state		= 0,						\
R
Roman Zippel 已提交
164
	.stack		= &init_thread_info,				\
L
Linus Torvalds 已提交
165
	.usage		= ATOMIC_INIT(2),				\
O
Oleg Nesterov 已提交
166
	.flags		= PF_KTHREAD,					\
L
Linus Torvalds 已提交
167 168
	.prio		= MAX_PRIO-20,					\
	.static_prio	= MAX_PRIO-20,					\
169
	.normal_prio	= MAX_PRIO-20,					\
L
Linus Torvalds 已提交
170 171
	.policy		= SCHED_NORMAL,					\
	.cpus_allowed	= CPU_MASK_ALL,					\
172
	.nr_cpus_allowed= NR_CPUS,					\
L
Linus Torvalds 已提交
173 174
	.mm		= NULL,						\
	.active_mm	= &init_mm,					\
175 176 177
	.se		= {						\
		.group_node 	= LIST_HEAD_INIT(tsk.se.group_node),	\
	},								\
P
Peter Zijlstra 已提交
178 179
	.rt		= {						\
		.run_list	= LIST_HEAD_INIT(tsk.rt.run_list),	\
180
		.time_slice	= RR_TIMESLICE,				\
P
Peter Zijlstra 已提交
181
	},								\
L
Linus Torvalds 已提交
182
	.tasks		= LIST_HEAD_INIT(tsk.tasks),			\
183
	INIT_PUSHABLE_TASKS(tsk)					\
P
Peter Zijlstra 已提交
184
	INIT_CGROUP_SCHED(tsk)						\
R
Roland McGrath 已提交
185 186
	.ptraced	= LIST_HEAD_INIT(tsk.ptraced),			\
	.ptrace_entry	= LIST_HEAD_INIT(tsk.ptrace_entry),		\
L
Linus Torvalds 已提交
187 188 189 190 191
	.real_parent	= &tsk,						\
	.parent		= &tsk,						\
	.children	= LIST_HEAD_INIT(tsk.children),			\
	.sibling	= LIST_HEAD_INIT(tsk.sibling),			\
	.group_leader	= &tsk,						\
192 193
	RCU_POINTER_INITIALIZER(real_cred, &init_cred),			\
	RCU_POINTER_INITIALIZER(cred, &init_cred),			\
194
	.comm		= INIT_TASK_COMM,				\
L
Linus Torvalds 已提交
195 196 197 198 199
	.thread		= INIT_THREAD,					\
	.fs		= &init_fs,					\
	.files		= &init_files,					\
	.signal		= &init_signals,				\
	.sighand	= &init_sighand,				\
S
Serge E. Hallyn 已提交
200
	.nsproxy	= &init_nsproxy,				\
L
Linus Torvalds 已提交
201 202 203 204
	.pending	= {						\
		.list = LIST_HEAD_INIT(tsk.pending.list),		\
		.signal = {{0}}},					\
	.blocked	= {{0}},					\
205
	.alloc_lock	= __SPIN_LOCK_UNLOCKED(tsk.alloc_lock),		\
206
	.journal_info	= NULL,						\
L
Linus Torvalds 已提交
207
	.cpu_timers	= INIT_CPU_TIMERS(tsk.cpu_timers),		\
208
	.pi_lock	= __RAW_SPIN_LOCK_UNLOCKED(tsk.pi_lock),	\
209
	.timer_slack_ns = 50000, /* 50 usec default slack */		\
210 211 212 213 214
	.pids = {							\
		[PIDTYPE_PID]  = INIT_PID_LINK(PIDTYPE_PID),		\
		[PIDTYPE_PGID] = INIT_PID_LINK(PIDTYPE_PGID),		\
		[PIDTYPE_SID]  = INIT_PID_LINK(PIDTYPE_SID),		\
	},								\
215
	.thread_group	= LIST_HEAD_INIT(tsk.thread_group),		\
A
Al Viro 已提交
216
	INIT_IDS							\
217
	INIT_PERF_EVENTS(tsk)						\
218
	INIT_TRACE_IRQFLAGS						\
I
Ingo Molnar 已提交
219
	INIT_LOCKDEP							\
220
	INIT_FTRACE_GRAPH						\
221
	INIT_TRACE_RECURSION						\
222
	INIT_TASK_RCU_PREEMPT(tsk)					\
223
	INIT_CPUSET_SEQ							\
224
	INIT_VTIME(tsk)							\
L
Linus Torvalds 已提交
225 226 227 228 229 230 231 232 233 234
}


#define INIT_CPU_TIMERS(cpu_timers)					\
{									\
	LIST_HEAD_INIT(cpu_timers[0]),					\
	LIST_HEAD_INIT(cpu_timers[1]),					\
	LIST_HEAD_INIT(cpu_timers[2]),					\
}

235
/* Attach to the init_task data structure for proper alignment */
236
#define __init_task_data __attribute__((__section__(".data..init_task")))
237

L
Linus Torvalds 已提交
238 239

#endif