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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 |