[linux-block.git] / init / init_task.c

// SPDX-License-Identifier: GPL-2.0
#include <linux/init_task.h>
#include <linux/export.h>
#include <linux/mqueue.h>
#include <linux/sched.h>
#include <linux/sched/sysctl.h>
#include <linux/sched/rt.h>
#include <linux/sched/task.h>
#include <linux/init.h>
#include <linux/fs.h>
#include <linux/mm.h>

#include <asm/pgtable.h>
#include <linux/uaccess.h>

static struct signal_struct init_signals = INIT_SIGNALS(init_signals);
static struct sighand_struct init_sighand = INIT_SIGHAND(init_sighand);

/*
 * Set up the first task table, touch at your own risk!. Base=0,
 * limit=0x1fffff (=2MB)
 */
struct task_struct init_task
#ifdef CONFIG_ARCH_TASK_STRUCT_ON_STACK
	__init_task_data
#endif
= {
#ifdef CONFIG_THREAD_INFO_IN_TASK
	.thread_info	= INIT_THREAD_INFO(init_task),
	.stack_refcount	= ATOMIC_INIT(1),
#endif
	.state		= 0,
	.stack		= init_stack,
	.usage		= ATOMIC_INIT(2),
	.flags		= PF_KTHREAD,
	.prio		= MAX_PRIO - 20,
	.static_prio	= MAX_PRIO - 20,
	.normal_prio	= MAX_PRIO - 20,
	.policy		= SCHED_NORMAL,
	.cpus_allowed	= CPU_MASK_ALL,
	.nr_cpus_allowed= NR_CPUS,
	.mm		= NULL,
	.active_mm	= &init_mm,
	.restart_block	= {
		.fn = do_no_restart_syscall,
	},
	.se		= {
		.group_node 	= LIST_HEAD_INIT(init_task.se.group_node),
	},
	.rt		= {
		.run_list	= LIST_HEAD_INIT(init_task.rt.run_list),
		.time_slice	= RR_TIMESLICE,
	},
	.tasks		= LIST_HEAD_INIT(init_task.tasks),
#ifdef CONFIG_SMP
	.pushable_tasks	= PLIST_NODE_INIT(init_task.pushable_tasks, MAX_PRIO),
#endif
#ifdef CONFIG_CGROUP_SCHED
	.sched_task_group = &root_task_group,
#endif
	.ptraced	= LIST_HEAD_INIT(init_task.ptraced),
	.ptrace_entry	= LIST_HEAD_INIT(init_task.ptrace_entry),
	.real_parent	= &init_task,
	.parent		= &init_task,
	.children	= LIST_HEAD_INIT(init_task.children),
	.sibling	= LIST_HEAD_INIT(init_task.sibling),
	.group_leader	= &init_task,
	RCU_POINTER_INITIALIZER(real_cred, &init_cred),
	RCU_POINTER_INITIALIZER(cred, &init_cred),
	.comm		= INIT_TASK_COMM,
	.thread		= INIT_THREAD,
	.fs		= &init_fs,
	.files		= &init_files,
	.signal		= &init_signals,
	.sighand	= &init_sighand,
	.nsproxy	= &init_nsproxy,
	.pending	= {
		.list = LIST_HEAD_INIT(init_task.pending.list),
		.signal = {{0}}
	},
	.blocked	= {{0}},
	.alloc_lock	= __SPIN_LOCK_UNLOCKED(init_task.alloc_lock),
	.journal_info	= NULL,
	INIT_CPU_TIMERS(init_task)
	.pi_lock	= __RAW_SPIN_LOCK_UNLOCKED(init_task.pi_lock),
	.timer_slack_ns = 50000, /* 50 usec default slack */
	.pids = {
		[PIDTYPE_PID]  = INIT_PID_LINK(PIDTYPE_PID),
		[PIDTYPE_PGID] = INIT_PID_LINK(PIDTYPE_PGID),
		[PIDTYPE_SID]  = INIT_PID_LINK(PIDTYPE_SID),
	},
	.thread_group	= LIST_HEAD_INIT(init_task.thread_group),
	.thread_node	= LIST_HEAD_INIT(init_signals.thread_head),
#ifdef CONFIG_AUDITSYSCALL
	.loginuid	= INVALID_UID,
	.sessionid	= (unsigned int)-1,
#endif
#ifdef CONFIG_PERF_EVENTS
	.perf_event_mutex = __MUTEX_INITIALIZER(init_task.perf_event_mutex),
	.perf_event_list = LIST_HEAD_INIT(init_task.perf_event_list),
#endif
#ifdef CONFIG_PREEMPT_RCU
	.rcu_read_lock_nesting = 0,
	.rcu_read_unlock_special.s = 0,
	.rcu_node_entry = LIST_HEAD_INIT(init_task.rcu_node_entry),
	.rcu_blocked_node = NULL,
#endif
#ifdef CONFIG_TASKS_RCU
	.rcu_tasks_holdout = false,
	.rcu_tasks_holdout_list = LIST_HEAD_INIT(init_task.rcu_tasks_holdout_list),
	.rcu_tasks_idle_cpu = -1,
#endif
#ifdef CONFIG_CPUSETS
	.mems_allowed_seq = SEQCNT_ZERO(init_task.mems_allowed_seq),
#endif
#ifdef CONFIG_RT_MUTEXES
	.pi_waiters	= RB_ROOT_CACHED,
	.pi_top_task	= NULL,
#endif
	INIT_PREV_CPUTIME(init_task)
#ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN
	.vtime.seqcount	= SEQCNT_ZERO(init_task.vtime_seqcount),
	.vtime.starttime = 0,
	.vtime.state	= VTIME_SYS,
#endif
#ifdef CONFIG_NUMA_BALANCING
	.numa_preferred_nid = -1,
	.numa_group	= NULL,
	.numa_faults	= NULL,
#endif
#ifdef CONFIG_KASAN
	.kasan_depth	= 1,
#endif
#ifdef CONFIG_TRACE_IRQFLAGS
	.softirqs_enabled = 1,
#endif
#ifdef CONFIG_LOCKDEP
	.lockdep_recursion = 0,
#endif
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
	.ret_stack	= NULL,
#endif
#if defined(CONFIG_TRACING) && defined(CONFIG_PREEMPT)
	.trace_recursion = 0,
#endif
#ifdef CONFIG_LIVEPATCH
	.patch_state	= KLP_UNDEFINED,
#endif
#ifdef CONFIG_SECURITY
	.security	= NULL,
#endif
};
EXPORT_SYMBOL(init_task);

/*
 * Initial thread structure. Alignment of this is handled by a special
 * linker map entry.
 */
#ifndef CONFIG_THREAD_INFO_IN_TASK
struct thread_info init_thread_info __init_thread_info = INIT_THREAD_INFO(init_task);
#endif
Commit	Line	Data
b2441318	1	// SPDX-License-Identifier: GPL-2.0
a4a2eb49 TG	2	#include <linux/init_task.h>
	3	#include <linux/export.h>
	4	#include <linux/mqueue.h>
	5	#include <linux/sched.h>
cf4aebc2	6	#include <linux/sched/sysctl.h>
8bd75c77	7	#include <linux/sched/rt.h>
9164bb4a	8	#include <linux/sched/task.h>
a4a2eb49 TG	9	#include <linux/init.h>
	10	#include <linux/fs.h>
	11	#include <linux/mm.h>
	12
	13	#include <asm/pgtable.h>
7c0f6ba6	14	#include <linux/uaccess.h>
a4a2eb49 TG	15
	16	static struct signal_struct init_signals = INIT_SIGNALS(init_signals);
	17	static struct sighand_struct init_sighand = INIT_SIGHAND(init_sighand);
	18
d11ed3ab DH	19	/*
	20	* Set up the first task table, touch at your own risk!. Base=0,
	21	* limit=0x1fffff (=2MB)
	22	*/
0500871f DH	23	struct task_struct init_task
	24	#ifdef CONFIG_ARCH_TASK_STRUCT_ON_STACK
	25	__init_task_data
	26	#endif
d11ed3ab	27	= {
4e7e3adb DH	28	#ifdef CONFIG_THREAD_INFO_IN_TASK
	29	.thread_info = INIT_THREAD_INFO(init_task),
	30	.stack_refcount = ATOMIC_INIT(1),
	31	#endif
d11ed3ab DH	32	.state = 0,
	33	.stack = init_stack,
	34	.usage = ATOMIC_INIT(2),
	35	.flags = PF_KTHREAD,
4e7e3adb DH	36	.prio = MAX_PRIO - 20,
	37	.static_prio = MAX_PRIO - 20,
	38	.normal_prio = MAX_PRIO - 20,
d11ed3ab DH	39	.policy = SCHED_NORMAL,
	40	.cpus_allowed = CPU_MASK_ALL,
	41	.nr_cpus_allowed= NR_CPUS,
	42	.mm = NULL,
	43	.active_mm = &init_mm,
4e7e3adb	44	.restart_block = {
d11ed3ab DH	45	.fn = do_no_restart_syscall,
	46	},
	47	.se = {
	48	.group_node = LIST_HEAD_INIT(init_task.se.group_node),
	49	},
	50	.rt = {
	51	.run_list = LIST_HEAD_INIT(init_task.rt.run_list),
	52	.time_slice = RR_TIMESLICE,
	53	},
	54	.tasks = LIST_HEAD_INIT(init_task.tasks),
4e7e3adb DH	55	#ifdef CONFIG_SMP
	56	.pushable_tasks = PLIST_NODE_INIT(init_task.pushable_tasks, MAX_PRIO),
	57	#endif
	58	#ifdef CONFIG_CGROUP_SCHED
	59	.sched_task_group = &root_task_group,
	60	#endif
d11ed3ab DH	61	.ptraced = LIST_HEAD_INIT(init_task.ptraced),
	62	.ptrace_entry = LIST_HEAD_INIT(init_task.ptrace_entry),
	63	.real_parent = &init_task,
	64	.parent = &init_task,
	65	.children = LIST_HEAD_INIT(init_task.children),
	66	.sibling = LIST_HEAD_INIT(init_task.sibling),
	67	.group_leader = &init_task,
	68	RCU_POINTER_INITIALIZER(real_cred, &init_cred),
	69	RCU_POINTER_INITIALIZER(cred, &init_cred),
	70	.comm = INIT_TASK_COMM,
	71	.thread = INIT_THREAD,
	72	.fs = &init_fs,
	73	.files = &init_files,
	74	.signal = &init_signals,
	75	.sighand = &init_sighand,
	76	.nsproxy = &init_nsproxy,
	77	.pending = {
	78	.list = LIST_HEAD_INIT(init_task.pending.list),
	79	.signal = {{0}}
	80	},
	81	.blocked = {{0}},
	82	.alloc_lock = __SPIN_LOCK_UNLOCKED(init_task.alloc_lock),
	83	.journal_info = NULL,
	84	INIT_CPU_TIMERS(init_task)
	85	.pi_lock = __RAW_SPIN_LOCK_UNLOCKED(init_task.pi_lock),
	86	.timer_slack_ns = 50000, /* 50 usec default slack */
	87	.pids = {
	88	[PIDTYPE_PID] = INIT_PID_LINK(PIDTYPE_PID),
	89	[PIDTYPE_PGID] = INIT_PID_LINK(PIDTYPE_PGID),
	90	[PIDTYPE_SID] = INIT_PID_LINK(PIDTYPE_SID),
	91	},
	92	.thread_group = LIST_HEAD_INIT(init_task.thread_group),
	93	.thread_node = LIST_HEAD_INIT(init_signals.thread_head),
4e7e3adb DH	94	#ifdef CONFIG_AUDITSYSCALL
	95	.loginuid = INVALID_UID,
	96	.sessionid = (unsigned int)-1,
	97	#endif
	98	#ifdef CONFIG_PERF_EVENTS
	99	.perf_event_mutex = __MUTEX_INITIALIZER(init_task.perf_event_mutex),
	100	.perf_event_list = LIST_HEAD_INIT(init_task.perf_event_list),
	101	#endif
	102	#ifdef CONFIG_PREEMPT_RCU
	103	.rcu_read_lock_nesting = 0,
	104	.rcu_read_unlock_special.s = 0,
	105	.rcu_node_entry = LIST_HEAD_INIT(init_task.rcu_node_entry),
	106	.rcu_blocked_node = NULL,
	107	#endif
	108	#ifdef CONFIG_TASKS_RCU
	109	.rcu_tasks_holdout = false,
	110	.rcu_tasks_holdout_list = LIST_HEAD_INIT(init_task.rcu_tasks_holdout_list),
	111	.rcu_tasks_idle_cpu = -1,
	112	#endif
	113	#ifdef CONFIG_CPUSETS
	114	.mems_allowed_seq = SEQCNT_ZERO(init_task.mems_allowed_seq),
	115	#endif
	116	#ifdef CONFIG_RT_MUTEXES
	117	.pi_waiters = RB_ROOT_CACHED,
	118	.pi_top_task = NULL,
	119	#endif
d11ed3ab	120	INIT_PREV_CPUTIME(init_task)
4e7e3adb DH	121	#ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN
	122	.vtime.seqcount = SEQCNT_ZERO(init_task.vtime_seqcount),
	123	.vtime.starttime = 0,
	124	.vtime.state = VTIME_SYS,
	125	#endif
	126	#ifdef CONFIG_NUMA_BALANCING
	127	.numa_preferred_nid = -1,
	128	.numa_group = NULL,
	129	.numa_faults = NULL,
	130	#endif
	131	#ifdef CONFIG_KASAN
	132	.kasan_depth = 1,
	133	#endif
	134	#ifdef CONFIG_TRACE_IRQFLAGS
	135	.softirqs_enabled = 1,
	136	#endif
	137	#ifdef CONFIG_LOCKDEP
	138	.lockdep_recursion = 0,
	139	#endif
	140	#ifdef CONFIG_FUNCTION_GRAPH_TRACER
	141	.ret_stack = NULL,
	142	#endif
	143	#if defined(CONFIG_TRACING) && defined(CONFIG_PREEMPT)
	144	.trace_recursion = 0,
	145	#endif
	146	#ifdef CONFIG_LIVEPATCH
	147	.patch_state = KLP_UNDEFINED,
	148	#endif
	149	#ifdef CONFIG_SECURITY
	150	.security = NULL,
	151	#endif
d11ed3ab	152	};
a4a2eb49 TG	153	EXPORT_SYMBOL(init_task);
	154
	155	/*
	156	* Initial thread structure. Alignment of this is handled by a special
	157	* linker map entry.
	158	*/
c65eacbe	159	#ifndef CONFIG_THREAD_INFO_IN_TASK
0500871f	160	struct thread_info init_thread_info __init_thread_info = INIT_THREAD_INFO(init_task);
c65eacbe	161	#endif