[thirdparty/kernel/stable.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 = {
	.nr_threads	= 1,
	.thread_head	= LIST_HEAD_INIT(init_task.thread_node),
	.wait_chldexit	= __WAIT_QUEUE_HEAD_INITIALIZER(init_signals.wait_chldexit),
	.shared_pending	= {
		.list = LIST_HEAD_INIT(init_signals.shared_pending.list),
		.signal =  {{0}}
	},
	.rlim		= INIT_RLIMITS,
	.cred_guard_mutex = __MUTEX_INITIALIZER(init_signals.cred_guard_mutex),
#ifdef CONFIG_POSIX_TIMERS
	.posix_timers = LIST_HEAD_INIT(init_signals.posix_timers),
	.cputimer	= {
		.cputime_atomic	= INIT_CPUTIME_ATOMIC,
		.running	= false,
		.checking_timer = false,
	},
#endif
	INIT_CPU_TIMERS(init_signals)
	INIT_PREV_CPUTIME(init_signals)
};

static struct sighand_struct init_sighand = {
	.count		= ATOMIC_INIT(1),
	.action		= { { { .sa_handler = SIG_DFL, } }, },
	.siglock	= __SPIN_LOCK_UNLOCKED(init_sighand.siglock),
	.signalfd_wqh	= __WAIT_QUEUE_HEAD_INITIALIZER(init_sighand.signalfd_wqh),
};

/*
 * 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	15
3678e2fc DH	16	static struct signal_struct init_signals = {
	17	.nr_threads = 1,
	18	.thread_head = LIST_HEAD_INIT(init_task.thread_node),
	19	.wait_chldexit = __WAIT_QUEUE_HEAD_INITIALIZER(init_signals.wait_chldexit),
	20	.shared_pending = {
	21	.list = LIST_HEAD_INIT(init_signals.shared_pending.list),
	22	.signal = {{0}}
	23	},
	24	.rlim = INIT_RLIMITS,
	25	.cred_guard_mutex = __MUTEX_INITIALIZER(init_signals.cred_guard_mutex),
	26	#ifdef CONFIG_POSIX_TIMERS
	27	.posix_timers = LIST_HEAD_INIT(init_signals.posix_timers),
	28	.cputimer = {
	29	.cputime_atomic = INIT_CPUTIME_ATOMIC,
	30	.running = false,
	31	.checking_timer = false,
	32	},
	33	#endif
	34	INIT_CPU_TIMERS(init_signals)
	35	INIT_PREV_CPUTIME(init_signals)
	36	};
	37
	38	static struct sighand_struct init_sighand = {
	39	.count = ATOMIC_INIT(1),
	40	.action = { { { .sa_handler = SIG_DFL, } }, },
	41	.siglock = __SPIN_LOCK_UNLOCKED(init_sighand.siglock),
	42	.signalfd_wqh = __WAIT_QUEUE_HEAD_INITIALIZER(init_sighand.signalfd_wqh),
	43	};
a4a2eb49	44
d11ed3ab DH	45	/*
	46	* Set up the first task table, touch at your own risk!. Base=0,
	47	* limit=0x1fffff (=2MB)
	48	*/
0500871f DH	49	struct task_struct init_task
	50	#ifdef CONFIG_ARCH_TASK_STRUCT_ON_STACK
	51	__init_task_data
	52	#endif
d11ed3ab	53	= {
4e7e3adb DH	54	#ifdef CONFIG_THREAD_INFO_IN_TASK
	55	.thread_info = INIT_THREAD_INFO(init_task),
	56	.stack_refcount = ATOMIC_INIT(1),
	57	#endif
d11ed3ab DH	58	.state = 0,
	59	.stack = init_stack,
	60	.usage = ATOMIC_INIT(2),
	61	.flags = PF_KTHREAD,
4e7e3adb DH	62	.prio = MAX_PRIO - 20,
	63	.static_prio = MAX_PRIO - 20,
	64	.normal_prio = MAX_PRIO - 20,
d11ed3ab DH	65	.policy = SCHED_NORMAL,
	66	.cpus_allowed = CPU_MASK_ALL,
	67	.nr_cpus_allowed= NR_CPUS,
	68	.mm = NULL,
	69	.active_mm = &init_mm,
4e7e3adb	70	.restart_block = {
d11ed3ab DH	71	.fn = do_no_restart_syscall,
	72	},
	73	.se = {
	74	.group_node = LIST_HEAD_INIT(init_task.se.group_node),
	75	},
	76	.rt = {
	77	.run_list = LIST_HEAD_INIT(init_task.rt.run_list),
	78	.time_slice = RR_TIMESLICE,
	79	},
	80	.tasks = LIST_HEAD_INIT(init_task.tasks),
4e7e3adb DH	81	#ifdef CONFIG_SMP
	82	.pushable_tasks = PLIST_NODE_INIT(init_task.pushable_tasks, MAX_PRIO),
	83	#endif
	84	#ifdef CONFIG_CGROUP_SCHED
	85	.sched_task_group = &root_task_group,
	86	#endif
d11ed3ab DH	87	.ptraced = LIST_HEAD_INIT(init_task.ptraced),
	88	.ptrace_entry = LIST_HEAD_INIT(init_task.ptrace_entry),
	89	.real_parent = &init_task,
	90	.parent = &init_task,
	91	.children = LIST_HEAD_INIT(init_task.children),
	92	.sibling = LIST_HEAD_INIT(init_task.sibling),
	93	.group_leader = &init_task,
	94	RCU_POINTER_INITIALIZER(real_cred, &init_cred),
	95	RCU_POINTER_INITIALIZER(cred, &init_cred),
	96	.comm = INIT_TASK_COMM,
	97	.thread = INIT_THREAD,
	98	.fs = &init_fs,
	99	.files = &init_files,
	100	.signal = &init_signals,
	101	.sighand = &init_sighand,
	102	.nsproxy = &init_nsproxy,
	103	.pending = {
	104	.list = LIST_HEAD_INIT(init_task.pending.list),
	105	.signal = {{0}}
	106	},
	107	.blocked = {{0}},
	108	.alloc_lock = __SPIN_LOCK_UNLOCKED(init_task.alloc_lock),
	109	.journal_info = NULL,
	110	INIT_CPU_TIMERS(init_task)
	111	.pi_lock = __RAW_SPIN_LOCK_UNLOCKED(init_task.pi_lock),
	112	.timer_slack_ns = 50000, /* 50 usec default slack */
	113	.pids = {
	114	[PIDTYPE_PID] = INIT_PID_LINK(PIDTYPE_PID),
	115	[PIDTYPE_PGID] = INIT_PID_LINK(PIDTYPE_PGID),
	116	[PIDTYPE_SID] = INIT_PID_LINK(PIDTYPE_SID),
	117	},
	118	.thread_group = LIST_HEAD_INIT(init_task.thread_group),
	119	.thread_node = LIST_HEAD_INIT(init_signals.thread_head),
4e7e3adb DH	120	#ifdef CONFIG_AUDITSYSCALL
	121	.loginuid = INVALID_UID,
	122	.sessionid = (unsigned int)-1,
	123	#endif
	124	#ifdef CONFIG_PERF_EVENTS
	125	.perf_event_mutex = __MUTEX_INITIALIZER(init_task.perf_event_mutex),
	126	.perf_event_list = LIST_HEAD_INIT(init_task.perf_event_list),
	127	#endif
	128	#ifdef CONFIG_PREEMPT_RCU
	129	.rcu_read_lock_nesting = 0,
	130	.rcu_read_unlock_special.s = 0,
	131	.rcu_node_entry = LIST_HEAD_INIT(init_task.rcu_node_entry),
	132	.rcu_blocked_node = NULL,
	133	#endif
	134	#ifdef CONFIG_TASKS_RCU
	135	.rcu_tasks_holdout = false,
	136	.rcu_tasks_holdout_list = LIST_HEAD_INIT(init_task.rcu_tasks_holdout_list),
	137	.rcu_tasks_idle_cpu = -1,
	138	#endif
	139	#ifdef CONFIG_CPUSETS
	140	.mems_allowed_seq = SEQCNT_ZERO(init_task.mems_allowed_seq),
	141	#endif
	142	#ifdef CONFIG_RT_MUTEXES
	143	.pi_waiters = RB_ROOT_CACHED,
	144	.pi_top_task = NULL,
	145	#endif
d11ed3ab	146	INIT_PREV_CPUTIME(init_task)
4e7e3adb DH	147	#ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN
	148	.vtime.seqcount = SEQCNT_ZERO(init_task.vtime_seqcount),
	149	.vtime.starttime = 0,
	150	.vtime.state = VTIME_SYS,
	151	#endif
	152	#ifdef CONFIG_NUMA_BALANCING
	153	.numa_preferred_nid = -1,
	154	.numa_group = NULL,
	155	.numa_faults = NULL,
	156	#endif
	157	#ifdef CONFIG_KASAN
	158	.kasan_depth = 1,
	159	#endif
	160	#ifdef CONFIG_TRACE_IRQFLAGS
	161	.softirqs_enabled = 1,
	162	#endif
	163	#ifdef CONFIG_LOCKDEP
	164	.lockdep_recursion = 0,
	165	#endif
	166	#ifdef CONFIG_FUNCTION_GRAPH_TRACER
	167	.ret_stack = NULL,
	168	#endif
	169	#if defined(CONFIG_TRACING) && defined(CONFIG_PREEMPT)
	170	.trace_recursion = 0,
	171	#endif
	172	#ifdef CONFIG_LIVEPATCH
	173	.patch_state = KLP_UNDEFINED,
	174	#endif
	175	#ifdef CONFIG_SECURITY
	176	.security = NULL,
	177	#endif
d11ed3ab	178	};
a4a2eb49 TG	179	EXPORT_SYMBOL(init_task);
	180
	181	/*
	182	* Initial thread structure. Alignment of this is handled by a special
	183	* linker map entry.
	184	*/
c65eacbe	185	#ifndef CONFIG_THREAD_INFO_IN_TASK
0500871f	186	struct thread_info init_thread_info __init_thread_info = INIT_THREAD_INFO(init_task);
c65eacbe	187	#endif