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 | |
16 | #include <linux/uaccess.h> |
17 | |
18 | static struct signal_struct init_signals = { |
19 | .nr_threads = 1, |
20 | .thread_head = LIST_HEAD_INIT(init_task.thread_node), |
21 | .wait_chldexit = __WAIT_QUEUE_HEAD_INITIALIZER(init_signals.wait_chldexit), |
22 | .shared_pending = { |
23 | .list = LIST_HEAD_INIT(init_signals.shared_pending.list), |
24 | .signal = {{0}} |
25 | }, |
26 | .multiprocess = HLIST_HEAD_INIT, |
27 | .rlim = INIT_RLIMITS, |
28 | .cred_guard_mutex = __MUTEX_INITIALIZER(init_signals.cred_guard_mutex), |
29 | .exec_update_lock = __RWSEM_INITIALIZER(init_signals.exec_update_lock), |
30 | #ifdef CONFIG_POSIX_TIMERS |
31 | .posix_timers = LIST_HEAD_INIT(init_signals.posix_timers), |
32 | .cputimer = { |
33 | .cputime_atomic = INIT_CPUTIME_ATOMIC, |
34 | }, |
35 | #endif |
36 | INIT_CPU_TIMERS(init_signals) |
37 | .pids = { |
38 | [PIDTYPE_PID] = &init_struct_pid, |
39 | [PIDTYPE_TGID] = &init_struct_pid, |
40 | [PIDTYPE_PGID] = &init_struct_pid, |
41 | [PIDTYPE_SID] = &init_struct_pid, |
42 | }, |
43 | INIT_PREV_CPUTIME(init_signals) |
44 | }; |
45 | |
46 | static struct sighand_struct init_sighand = { |
47 | .count = REFCOUNT_INIT(1), |
48 | .action = { { { .sa_handler = SIG_DFL, } }, }, |
49 | .siglock = __SPIN_LOCK_UNLOCKED(init_sighand.siglock), |
50 | .signalfd_wqh = __WAIT_QUEUE_HEAD_INITIALIZER(init_sighand.signalfd_wqh), |
51 | }; |
52 | |
53 | #ifdef CONFIG_SHADOW_CALL_STACK |
54 | unsigned long init_shadow_call_stack[SCS_SIZE / sizeof(long)] |
55 | __init_task_data = { |
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 | */ |
64 | struct task_struct init_task |
65 | #ifdef CONFIG_ARCH_TASK_STRUCT_ON_STACK |
66 | __init_task_data |
67 | #endif |
68 | __aligned(L1_CACHE_BYTES) |
69 | = { |
70 | #ifdef CONFIG_THREAD_INFO_IN_TASK |
71 | .thread_info = INIT_THREAD_INFO(init_task), |
72 | .stack_refcount = REFCOUNT_INIT(1), |
73 | #endif |
74 | .__state = 0, |
75 | .stack = init_stack, |
76 | .usage = REFCOUNT_INIT(2), |
77 | .flags = PF_KTHREAD, |
78 | .prio = MAX_PRIO - 20, |
79 | .static_prio = MAX_PRIO - 20, |
80 | .normal_prio = MAX_PRIO - 20, |
81 | .policy = SCHED_NORMAL, |
82 | .cpus_ptr = &init_task.cpus_mask, |
83 | .user_cpus_ptr = NULL, |
84 | .cpus_mask = CPU_MASK_ALL, |
85 | .nr_cpus_allowed= NR_CPUS, |
86 | .mm = NULL, |
87 | .active_mm = &init_mm, |
88 | .faults_disabled_mapping = NULL, |
89 | .restart_block = { |
90 | .fn = do_no_restart_syscall, |
91 | }, |
92 | .se = { |
93 | .group_node = LIST_HEAD_INIT(init_task.se.group_node), |
94 | }, |
95 | .rt = { |
96 | .run_list = LIST_HEAD_INIT(init_task.rt.run_list), |
97 | .time_slice = RR_TIMESLICE, |
98 | }, |
99 | .tasks = LIST_HEAD_INIT(init_task.tasks), |
100 | #ifdef CONFIG_SMP |
101 | .pushable_tasks = PLIST_NODE_INIT(init_task.pushable_tasks, MAX_PRIO), |
102 | #endif |
103 | #ifdef CONFIG_CGROUP_SCHED |
104 | .sched_task_group = &root_task_group, |
105 | #endif |
106 | .ptraced = LIST_HEAD_INIT(init_task.ptraced), |
107 | .ptrace_entry = LIST_HEAD_INIT(init_task.ptrace_entry), |
108 | .real_parent = &init_task, |
109 | .parent = &init_task, |
110 | .children = LIST_HEAD_INIT(init_task.children), |
111 | .sibling = LIST_HEAD_INIT(init_task.sibling), |
112 | .group_leader = &init_task, |
113 | RCU_POINTER_INITIALIZER(real_cred, &init_cred), |
114 | RCU_POINTER_INITIALIZER(cred, &init_cred), |
115 | .comm = INIT_TASK_COMM, |
116 | .thread = INIT_THREAD, |
117 | .fs = &init_fs, |
118 | .files = &init_files, |
119 | #ifdef CONFIG_IO_URING |
120 | .io_uring = NULL, |
121 | #endif |
122 | .signal = &init_signals, |
123 | .sighand = &init_sighand, |
124 | .nsproxy = &init_nsproxy, |
125 | .pending = { |
126 | .list = LIST_HEAD_INIT(init_task.pending.list), |
127 | .signal = {{0}} |
128 | }, |
129 | .blocked = {{0}}, |
130 | .alloc_lock = __SPIN_LOCK_UNLOCKED(init_task.alloc_lock), |
131 | .journal_info = NULL, |
132 | INIT_CPU_TIMERS(init_task) |
133 | .pi_lock = __RAW_SPIN_LOCK_UNLOCKED(init_task.pi_lock), |
134 | .timer_slack_ns = 50000, /* 50 usec default slack */ |
135 | .thread_pid = &init_struct_pid, |
136 | .thread_node = LIST_HEAD_INIT(init_signals.thread_head), |
137 | #ifdef CONFIG_AUDIT |
138 | .loginuid = INVALID_UID, |
139 | .sessionid = AUDIT_SID_UNSET, |
140 | #endif |
141 | #ifdef CONFIG_PERF_EVENTS |
142 | .perf_event_mutex = __MUTEX_INITIALIZER(init_task.perf_event_mutex), |
143 | .perf_event_list = LIST_HEAD_INIT(init_task.perf_event_list), |
144 | #endif |
145 | #ifdef CONFIG_PREEMPT_RCU |
146 | .rcu_read_lock_nesting = 0, |
147 | .rcu_read_unlock_special.s = 0, |
148 | .rcu_node_entry = LIST_HEAD_INIT(init_task.rcu_node_entry), |
149 | .rcu_blocked_node = NULL, |
150 | #endif |
151 | #ifdef CONFIG_TASKS_RCU |
152 | .rcu_tasks_holdout = false, |
153 | .rcu_tasks_holdout_list = LIST_HEAD_INIT(init_task.rcu_tasks_holdout_list), |
154 | .rcu_tasks_idle_cpu = -1, |
155 | #endif |
156 | #ifdef CONFIG_TASKS_TRACE_RCU |
157 | .trc_reader_nesting = 0, |
158 | .trc_reader_special.s = 0, |
159 | .trc_holdout_list = LIST_HEAD_INIT(init_task.trc_holdout_list), |
160 | .trc_blkd_node = LIST_HEAD_INIT(init_task.trc_blkd_node), |
161 | #endif |
162 | #ifdef CONFIG_CPUSETS |
163 | .mems_allowed_seq = SEQCNT_SPINLOCK_ZERO(init_task.mems_allowed_seq, |
164 | &init_task.alloc_lock), |
165 | #endif |
166 | #ifdef CONFIG_RT_MUTEXES |
167 | .pi_waiters = RB_ROOT_CACHED, |
168 | .pi_top_task = NULL, |
169 | #endif |
170 | INIT_PREV_CPUTIME(init_task) |
171 | #ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN |
172 | .vtime.seqcount = SEQCNT_ZERO(init_task.vtime_seqcount), |
173 | .vtime.starttime = 0, |
174 | .vtime.state = VTIME_SYS, |
175 | #endif |
176 | #ifdef CONFIG_NUMA_BALANCING |
177 | .numa_preferred_nid = NUMA_NO_NODE, |
178 | .numa_group = NULL, |
179 | .numa_faults = NULL, |
180 | #endif |
181 | #if defined(CONFIG_KASAN_GENERIC) || defined(CONFIG_KASAN_SW_TAGS) |
182 | .kasan_depth = 1, |
183 | #endif |
184 | #ifdef CONFIG_KCSAN |
185 | .kcsan_ctx = { |
186 | .scoped_accesses = {LIST_POISON1, NULL}, |
187 | }, |
188 | #endif |
189 | #ifdef CONFIG_TRACE_IRQFLAGS |
190 | .softirqs_enabled = 1, |
191 | #endif |
192 | #ifdef CONFIG_LOCKDEP |
193 | .lockdep_depth = 0, /* no locks held yet */ |
194 | .curr_chain_key = INITIAL_CHAIN_KEY, |
195 | .lockdep_recursion = 0, |
196 | #endif |
197 | #ifdef CONFIG_FUNCTION_GRAPH_TRACER |
198 | .ret_stack = NULL, |
199 | .tracing_graph_pause = ATOMIC_INIT(0), |
200 | #endif |
201 | #if defined(CONFIG_TRACING) && defined(CONFIG_PREEMPTION) |
202 | .trace_recursion = 0, |
203 | #endif |
204 | #ifdef CONFIG_LIVEPATCH |
205 | .patch_state = KLP_UNDEFINED, |
206 | #endif |
207 | #ifdef CONFIG_SECURITY |
208 | .security = NULL, |
209 | #endif |
210 | #ifdef CONFIG_SECCOMP_FILTER |
211 | .seccomp = { .filter_count = ATOMIC_INIT(0) }, |
212 | #endif |
213 | }; |
214 | EXPORT_SYMBOL(init_task); |
215 | |
216 | /* |
217 | * Initial thread structure. Alignment of this is handled by a special |
218 | * linker map entry. |
219 | */ |
220 | #ifndef CONFIG_THREAD_INFO_IN_TASK |
221 | struct thread_info init_thread_info __init_thread_info = INIT_THREAD_INFO(init_task); |
222 | #endif |
223 | |