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1// SPDX-License-Identifier: GPL-2.02#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/sched/ext.h>10#include <linux/init.h>11#include <linux/fs.h>12#include <linux/mm.h>13#include <linux/audit.h>14#include <linux/numa.h>15#include <linux/scs.h>16#include <linux/plist.h>17 18#include <linux/uaccess.h>19 20static struct signal_struct init_signals = {21 .nr_threads = 1,22 .thread_head = LIST_HEAD_INIT(init_task.thread_node),23 .wait_chldexit = __WAIT_QUEUE_HEAD_INITIALIZER(init_signals.wait_chldexit),24 .shared_pending = {25 .list = LIST_HEAD_INIT(init_signals.shared_pending.list),26 .signal = {{0}}27 },28 .multiprocess = HLIST_HEAD_INIT,29 .rlim = INIT_RLIMITS,30 .cred_guard_mutex = __MUTEX_INITIALIZER(init_signals.cred_guard_mutex),31 .exec_update_lock = __RWSEM_INITIALIZER(init_signals.exec_update_lock),32#ifdef CONFIG_POSIX_TIMERS33 .posix_timers = HLIST_HEAD_INIT,34 .cputimer = {35 .cputime_atomic = INIT_CPUTIME_ATOMIC,36 },37#endif38 INIT_CPU_TIMERS(init_signals)39 .pids = {40 [PIDTYPE_PID] = &init_struct_pid,41 [PIDTYPE_TGID] = &init_struct_pid,42 [PIDTYPE_PGID] = &init_struct_pid,43 [PIDTYPE_SID] = &init_struct_pid,44 },45 INIT_PREV_CPUTIME(init_signals)46};47 48static struct sighand_struct init_sighand = {49 .count = REFCOUNT_INIT(1),50 .action = { { { .sa_handler = SIG_DFL, } }, },51 .siglock = __SPIN_LOCK_UNLOCKED(init_sighand.siglock),52 .signalfd_wqh = __WAIT_QUEUE_HEAD_INITIALIZER(init_sighand.signalfd_wqh),53};54 55#ifdef CONFIG_SHADOW_CALL_STACK56unsigned long init_shadow_call_stack[SCS_SIZE / sizeof(long)] = {57 [(SCS_SIZE / sizeof(long)) - 1] = SCS_END_MAGIC58};59#endif60 61/*62 * Set up the first task table, touch at your own risk!. Base=0,63 * limit=0x1fffff (=2MB)64 */65struct task_struct init_task __aligned(L1_CACHE_BYTES) = {66#ifdef CONFIG_THREAD_INFO_IN_TASK67 .thread_info = INIT_THREAD_INFO(init_task),68 .stack_refcount = REFCOUNT_INIT(1),69#endif70 .__state = 0,71 .stack = init_stack,72 .usage = REFCOUNT_INIT(2),73 .flags = PF_KTHREAD,74 .prio = MAX_PRIO - 20,75 .static_prio = MAX_PRIO - 20,76 .normal_prio = MAX_PRIO - 20,77 .policy = SCHED_NORMAL,78 .cpus_ptr = &init_task.cpus_mask,79 .user_cpus_ptr = NULL,80 .cpus_mask = CPU_MASK_ALL,81 .max_allowed_capacity = SCHED_CAPACITY_SCALE,82 .nr_cpus_allowed= NR_CPUS,83 .mm = NULL,84 .active_mm = &init_mm,85 .faults_disabled_mapping = NULL,86 .restart_block = {87 .fn = do_no_restart_syscall,88 },89 .se = {90 .group_node = LIST_HEAD_INIT(init_task.se.group_node),91 },92 .rt = {93 .run_list = LIST_HEAD_INIT(init_task.rt.run_list),94 .time_slice = RR_TIMESLICE,95 },96 .tasks = LIST_HEAD_INIT(init_task.tasks),97#ifdef CONFIG_SMP98 .pushable_tasks = PLIST_NODE_INIT(init_task.pushable_tasks, MAX_PRIO),99#endif100#ifdef CONFIG_CGROUP_SCHED101 .sched_task_group = &root_task_group,102#endif103#ifdef CONFIG_SCHED_CLASS_EXT104 .scx = {105 .dsq_list.node = LIST_HEAD_INIT(init_task.scx.dsq_list.node),106 .sticky_cpu = -1,107 .holding_cpu = -1,108 .runnable_node = LIST_HEAD_INIT(init_task.scx.runnable_node),109 .runnable_at = INITIAL_JIFFIES,110 .ddsp_dsq_id = SCX_DSQ_INVALID,111 .slice = SCX_SLICE_DFL,112 },113#endif114 .ptraced = LIST_HEAD_INIT(init_task.ptraced),115 .ptrace_entry = LIST_HEAD_INIT(init_task.ptrace_entry),116 .real_parent = &init_task,117 .parent = &init_task,118 .children = LIST_HEAD_INIT(init_task.children),119 .sibling = LIST_HEAD_INIT(init_task.sibling),120 .group_leader = &init_task,121 RCU_POINTER_INITIALIZER(real_cred, &init_cred),122 RCU_POINTER_INITIALIZER(cred, &init_cred),123 .comm = INIT_TASK_COMM,124 .thread = INIT_THREAD,125 .fs = &init_fs,126 .files = &init_files,127#ifdef CONFIG_IO_URING128 .io_uring = NULL,129#endif130 .signal = &init_signals,131 .sighand = &init_sighand,132 .nsproxy = &init_nsproxy,133 .pending = {134 .list = LIST_HEAD_INIT(init_task.pending.list),135 .signal = {{0}}136 },137 .blocked = {{0}},138 .alloc_lock = __SPIN_LOCK_UNLOCKED(init_task.alloc_lock),139 .journal_info = NULL,140 INIT_CPU_TIMERS(init_task)141 .pi_lock = __RAW_SPIN_LOCK_UNLOCKED(init_task.pi_lock),142 .timer_slack_ns = 50000, /* 50 usec default slack */143 .thread_pid = &init_struct_pid,144 .thread_node = LIST_HEAD_INIT(init_signals.thread_head),145#ifdef CONFIG_AUDIT146 .loginuid = INVALID_UID,147 .sessionid = AUDIT_SID_UNSET,148#endif149#ifdef CONFIG_PERF_EVENTS150 .perf_event_mutex = __MUTEX_INITIALIZER(init_task.perf_event_mutex),151 .perf_event_list = LIST_HEAD_INIT(init_task.perf_event_list),152#endif153#ifdef CONFIG_PREEMPT_RCU154 .rcu_read_lock_nesting = 0,155 .rcu_read_unlock_special.s = 0,156 .rcu_node_entry = LIST_HEAD_INIT(init_task.rcu_node_entry),157 .rcu_blocked_node = NULL,158#endif159#ifdef CONFIG_TASKS_RCU160 .rcu_tasks_holdout = false,161 .rcu_tasks_holdout_list = LIST_HEAD_INIT(init_task.rcu_tasks_holdout_list),162 .rcu_tasks_idle_cpu = -1,163 .rcu_tasks_exit_list = LIST_HEAD_INIT(init_task.rcu_tasks_exit_list),164#endif165#ifdef CONFIG_TASKS_TRACE_RCU166 .trc_reader_nesting = 0,167 .trc_reader_special.s = 0,168 .trc_holdout_list = LIST_HEAD_INIT(init_task.trc_holdout_list),169 .trc_blkd_node = LIST_HEAD_INIT(init_task.trc_blkd_node),170#endif171#ifdef CONFIG_CPUSETS172 .mems_allowed_seq = SEQCNT_SPINLOCK_ZERO(init_task.mems_allowed_seq,173 &init_task.alloc_lock),174#endif175#ifdef CONFIG_RT_MUTEXES176 .pi_waiters = RB_ROOT_CACHED,177 .pi_top_task = NULL,178#endif179 INIT_PREV_CPUTIME(init_task)180#ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN181 .vtime.seqcount = SEQCNT_ZERO(init_task.vtime_seqcount),182 .vtime.starttime = 0,183 .vtime.state = VTIME_SYS,184#endif185#ifdef CONFIG_NUMA_BALANCING186 .numa_preferred_nid = NUMA_NO_NODE,187 .numa_group = NULL,188 .numa_faults = NULL,189#endif190#if defined(CONFIG_KASAN_GENERIC) || defined(CONFIG_KASAN_SW_TAGS)191 .kasan_depth = 1,192#endif193#ifdef CONFIG_KCSAN194 .kcsan_ctx = {195 .scoped_accesses = {LIST_POISON1, NULL},196 },197#endif198#ifdef CONFIG_TRACE_IRQFLAGS199 .softirqs_enabled = 1,200#endif201#ifdef CONFIG_LOCKDEP202 .lockdep_depth = 0, /* no locks held yet */203 .curr_chain_key = INITIAL_CHAIN_KEY,204 .lockdep_recursion = 0,205#endif206#ifdef CONFIG_FUNCTION_GRAPH_TRACER207 .ret_stack = NULL,208 .tracing_graph_pause = ATOMIC_INIT(0),209#endif210#if defined(CONFIG_TRACING) && defined(CONFIG_PREEMPTION)211 .trace_recursion = 0,212#endif213#ifdef CONFIG_LIVEPATCH214 .patch_state = KLP_TRANSITION_IDLE,215#endif216#ifdef CONFIG_SECURITY217 .security = NULL,218#endif219#ifdef CONFIG_SECCOMP_FILTER220 .seccomp = { .filter_count = ATOMIC_INIT(0) },221#endif222};223EXPORT_SYMBOL(init_task);224 225/*226 * Initial thread structure. Alignment of this is handled by a special227 * linker map entry.228 */229#ifndef CONFIG_THREAD_INFO_IN_TASK230struct thread_info init_thread_info __init_thread_info = INIT_THREAD_INFO(init_task);231#endif232