Loading...
1#include <linux/init_task.h>
2#include <linux/export.h>
3#include <linux/mqueue.h>
4#include <linux/sched.h>
5#include <linux/sched/sysctl.h>
6#include <linux/sched/rt.h>
7#include <linux/init.h>
8#include <linux/fs.h>
9#include <linux/mm.h>
10
11#include <asm/pgtable.h>
12#include <asm/uaccess.h>
13
14static struct signal_struct init_signals = INIT_SIGNALS(init_signals);
15static struct sighand_struct init_sighand = INIT_SIGHAND(init_sighand);
16
17/* Initial task structure */
18struct task_struct init_task = INIT_TASK(init_task);
19EXPORT_SYMBOL(init_task);
20
21/*
22 * Initial thread structure. Alignment of this is handled by a special
23 * linker map entry.
24 */
25union thread_union init_thread_union __init_task_data =
26 { INIT_THREAD_INFO(init_task) };
1// SPDX-License-Identifier: GPL-2.0
2#include <linux/init_task.h>
3#include <linux/export.h>
4#include <linux/mqueue.h>
5#include <linux/sched.h>
6#include <linux/sched/sysctl.h>
7#include <linux/sched/rt.h>
8#include <linux/sched/task.h>
9#include <linux/init.h>
10#include <linux/fs.h>
11#include <linux/mm.h>
12#include <linux/audit.h>
13#include <linux/numa.h>
14#include <linux/scs.h>
15#include <linux/plist.h>
16
17#include <linux/uaccess.h>
18
19static struct signal_struct init_signals = {
20 .nr_threads = 1,
21 .thread_head = LIST_HEAD_INIT(init_task.thread_node),
22 .wait_chldexit = __WAIT_QUEUE_HEAD_INITIALIZER(init_signals.wait_chldexit),
23 .shared_pending = {
24 .list = LIST_HEAD_INIT(init_signals.shared_pending.list),
25 .signal = {{0}}
26 },
27 .multiprocess = HLIST_HEAD_INIT,
28 .rlim = INIT_RLIMITS,
29 .cred_guard_mutex = __MUTEX_INITIALIZER(init_signals.cred_guard_mutex),
30 .exec_update_lock = __RWSEM_INITIALIZER(init_signals.exec_update_lock),
31#ifdef CONFIG_POSIX_TIMERS
32 .posix_timers = LIST_HEAD_INIT(init_signals.posix_timers),
33 .cputimer = {
34 .cputime_atomic = INIT_CPUTIME_ATOMIC,
35 },
36#endif
37 INIT_CPU_TIMERS(init_signals)
38 .pids = {
39 [PIDTYPE_PID] = &init_struct_pid,
40 [PIDTYPE_TGID] = &init_struct_pid,
41 [PIDTYPE_PGID] = &init_struct_pid,
42 [PIDTYPE_SID] = &init_struct_pid,
43 },
44 INIT_PREV_CPUTIME(init_signals)
45};
46
47static struct sighand_struct init_sighand = {
48 .count = REFCOUNT_INIT(1),
49 .action = { { { .sa_handler = SIG_DFL, } }, },
50 .siglock = __SPIN_LOCK_UNLOCKED(init_sighand.siglock),
51 .signalfd_wqh = __WAIT_QUEUE_HEAD_INITIALIZER(init_sighand.signalfd_wqh),
52};
53
54#ifdef CONFIG_SHADOW_CALL_STACK
55unsigned long init_shadow_call_stack[SCS_SIZE / sizeof(long)] = {
56 [(SCS_SIZE / sizeof(long)) - 1] = SCS_END_MAGIC
57};
58#endif
59
60/*
61 * Set up the first task table, touch at your own risk!. Base=0,
62 * limit=0x1fffff (=2MB)
63 */
64struct task_struct init_task __aligned(L1_CACHE_BYTES) = {
65#ifdef CONFIG_THREAD_INFO_IN_TASK
66 .thread_info = INIT_THREAD_INFO(init_task),
67 .stack_refcount = REFCOUNT_INIT(1),
68#endif
69 .__state = 0,
70 .stack = init_stack,
71 .usage = REFCOUNT_INIT(2),
72 .flags = PF_KTHREAD,
73 .prio = MAX_PRIO - 20,
74 .static_prio = MAX_PRIO - 20,
75 .normal_prio = MAX_PRIO - 20,
76 .policy = SCHED_NORMAL,
77 .cpus_ptr = &init_task.cpus_mask,
78 .user_cpus_ptr = NULL,
79 .cpus_mask = CPU_MASK_ALL,
80 .nr_cpus_allowed= NR_CPUS,
81 .mm = NULL,
82 .active_mm = &init_mm,
83 .faults_disabled_mapping = NULL,
84 .restart_block = {
85 .fn = do_no_restart_syscall,
86 },
87 .se = {
88 .group_node = LIST_HEAD_INIT(init_task.se.group_node),
89 },
90 .rt = {
91 .run_list = LIST_HEAD_INIT(init_task.rt.run_list),
92 .time_slice = RR_TIMESLICE,
93 },
94 .tasks = LIST_HEAD_INIT(init_task.tasks),
95#ifdef CONFIG_SMP
96 .pushable_tasks = PLIST_NODE_INIT(init_task.pushable_tasks, MAX_PRIO),
97#endif
98#ifdef CONFIG_CGROUP_SCHED
99 .sched_task_group = &root_task_group,
100#endif
101 .ptraced = LIST_HEAD_INIT(init_task.ptraced),
102 .ptrace_entry = LIST_HEAD_INIT(init_task.ptrace_entry),
103 .real_parent = &init_task,
104 .parent = &init_task,
105 .children = LIST_HEAD_INIT(init_task.children),
106 .sibling = LIST_HEAD_INIT(init_task.sibling),
107 .group_leader = &init_task,
108 RCU_POINTER_INITIALIZER(real_cred, &init_cred),
109 RCU_POINTER_INITIALIZER(cred, &init_cred),
110 .comm = INIT_TASK_COMM,
111 .thread = INIT_THREAD,
112 .fs = &init_fs,
113 .files = &init_files,
114#ifdef CONFIG_IO_URING
115 .io_uring = NULL,
116#endif
117 .signal = &init_signals,
118 .sighand = &init_sighand,
119 .nsproxy = &init_nsproxy,
120 .pending = {
121 .list = LIST_HEAD_INIT(init_task.pending.list),
122 .signal = {{0}}
123 },
124 .blocked = {{0}},
125 .alloc_lock = __SPIN_LOCK_UNLOCKED(init_task.alloc_lock),
126 .journal_info = NULL,
127 INIT_CPU_TIMERS(init_task)
128 .pi_lock = __RAW_SPIN_LOCK_UNLOCKED(init_task.pi_lock),
129 .timer_slack_ns = 50000, /* 50 usec default slack */
130 .thread_pid = &init_struct_pid,
131 .thread_node = LIST_HEAD_INIT(init_signals.thread_head),
132#ifdef CONFIG_AUDIT
133 .loginuid = INVALID_UID,
134 .sessionid = AUDIT_SID_UNSET,
135#endif
136#ifdef CONFIG_PERF_EVENTS
137 .perf_event_mutex = __MUTEX_INITIALIZER(init_task.perf_event_mutex),
138 .perf_event_list = LIST_HEAD_INIT(init_task.perf_event_list),
139#endif
140#ifdef CONFIG_PREEMPT_RCU
141 .rcu_read_lock_nesting = 0,
142 .rcu_read_unlock_special.s = 0,
143 .rcu_node_entry = LIST_HEAD_INIT(init_task.rcu_node_entry),
144 .rcu_blocked_node = NULL,
145#endif
146#ifdef CONFIG_TASKS_RCU
147 .rcu_tasks_holdout = false,
148 .rcu_tasks_holdout_list = LIST_HEAD_INIT(init_task.rcu_tasks_holdout_list),
149 .rcu_tasks_idle_cpu = -1,
150 .rcu_tasks_exit_list = LIST_HEAD_INIT(init_task.rcu_tasks_exit_list),
151#endif
152#ifdef CONFIG_TASKS_TRACE_RCU
153 .trc_reader_nesting = 0,
154 .trc_reader_special.s = 0,
155 .trc_holdout_list = LIST_HEAD_INIT(init_task.trc_holdout_list),
156 .trc_blkd_node = LIST_HEAD_INIT(init_task.trc_blkd_node),
157#endif
158#ifdef CONFIG_CPUSETS
159 .mems_allowed_seq = SEQCNT_SPINLOCK_ZERO(init_task.mems_allowed_seq,
160 &init_task.alloc_lock),
161#endif
162#ifdef CONFIG_RT_MUTEXES
163 .pi_waiters = RB_ROOT_CACHED,
164 .pi_top_task = NULL,
165#endif
166 INIT_PREV_CPUTIME(init_task)
167#ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN
168 .vtime.seqcount = SEQCNT_ZERO(init_task.vtime_seqcount),
169 .vtime.starttime = 0,
170 .vtime.state = VTIME_SYS,
171#endif
172#ifdef CONFIG_NUMA_BALANCING
173 .numa_preferred_nid = NUMA_NO_NODE,
174 .numa_group = NULL,
175 .numa_faults = NULL,
176#endif
177#if defined(CONFIG_KASAN_GENERIC) || defined(CONFIG_KASAN_SW_TAGS)
178 .kasan_depth = 1,
179#endif
180#ifdef CONFIG_KCSAN
181 .kcsan_ctx = {
182 .scoped_accesses = {LIST_POISON1, NULL},
183 },
184#endif
185#ifdef CONFIG_TRACE_IRQFLAGS
186 .softirqs_enabled = 1,
187#endif
188#ifdef CONFIG_LOCKDEP
189 .lockdep_depth = 0, /* no locks held yet */
190 .curr_chain_key = INITIAL_CHAIN_KEY,
191 .lockdep_recursion = 0,
192#endif
193#ifdef CONFIG_FUNCTION_GRAPH_TRACER
194 .ret_stack = NULL,
195 .tracing_graph_pause = ATOMIC_INIT(0),
196#endif
197#if defined(CONFIG_TRACING) && defined(CONFIG_PREEMPTION)
198 .trace_recursion = 0,
199#endif
200#ifdef CONFIG_LIVEPATCH
201 .patch_state = KLP_UNDEFINED,
202#endif
203#ifdef CONFIG_SECURITY
204 .security = NULL,
205#endif
206#ifdef CONFIG_SECCOMP_FILTER
207 .seccomp = { .filter_count = ATOMIC_INIT(0) },
208#endif
209};
210EXPORT_SYMBOL(init_task);
211
212/*
213 * Initial thread structure. Alignment of this is handled by a special
214 * linker map entry.
215 */
216#ifndef CONFIG_THREAD_INFO_IN_TASK
217struct thread_info init_thread_info __init_thread_info = INIT_THREAD_INFO(init_task);
218#endif