projects/linux·blob v6.2-rc3 · refs

222 lines · 6.1 KiB

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
18static 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
46static 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
54unsigned 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 */
64struct 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 .restart_block = {
89 .fn = do_no_restart_syscall,
90 },
91 .se = {
92 .group_node = LIST_HEAD_INIT(init_task.se.group_node),
93 },
94 .rt = {
95 .run_list = LIST_HEAD_INIT(init_task.rt.run_list),
96 .time_slice = RR_TIMESLICE,
97 },
98 .tasks = LIST_HEAD_INIT(init_task.tasks),
99#ifdef CONFIG_SMP
100 .pushable_tasks = PLIST_NODE_INIT(init_task.pushable_tasks, MAX_PRIO),
101#endif
102#ifdef CONFIG_CGROUP_SCHED
103 .sched_task_group = &root_task_group,
104#endif
105 .ptraced = LIST_HEAD_INIT(init_task.ptraced),
106 .ptrace_entry = LIST_HEAD_INIT(init_task.ptrace_entry),
107 .real_parent = &init_task,
108 .parent = &init_task,
109 .children = LIST_HEAD_INIT(init_task.children),
110 .sibling = LIST_HEAD_INIT(init_task.sibling),
111 .group_leader = &init_task,
112 RCU_POINTER_INITIALIZER(real_cred, &init_cred),
113 RCU_POINTER_INITIALIZER(cred, &init_cred),
114 .comm = INIT_TASK_COMM,
115 .thread = INIT_THREAD,
116 .fs = &init_fs,
117 .files = &init_files,
118#ifdef CONFIG_IO_URING
119 .io_uring = NULL,
120#endif
121 .signal = &init_signals,
122 .sighand = &init_sighand,
123 .nsproxy = &init_nsproxy,
124 .pending = {
125 .list = LIST_HEAD_INIT(init_task.pending.list),
126 .signal = {{0}}
127 },
128 .blocked = {{0}},
129 .alloc_lock = __SPIN_LOCK_UNLOCKED(init_task.alloc_lock),
130 .journal_info = NULL,
131 INIT_CPU_TIMERS(init_task)
132 .pi_lock = __RAW_SPIN_LOCK_UNLOCKED(init_task.pi_lock),
133 .timer_slack_ns = 50000, /* 50 usec default slack */
134 .thread_pid = &init_struct_pid,
135 .thread_group = LIST_HEAD_INIT(init_task.thread_group),
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};
214EXPORT_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
221struct thread_info init_thread_info __init_thread_info = INIT_THREAD_INFO(init_task);
222#endif