| // SPDX-License-Identifier: GPL-2.0 |
| #include <linux/init_task.h> |
| #include <linux/export.h> |
| #include <linux/mqueue.h> |
| #include <linux/sched.h> |
| #include <linux/sched/sysctl.h> |
| #include <linux/sched/rt.h> |
| #include <linux/sched/task.h> |
| #include <linux/init.h> |
| #include <linux/fs.h> |
| #include <linux/mm.h> |
| #include <linux/audit.h> |
| #include <linux/numa.h> |
| #include <linux/scs.h> |
| |
| #include <linux/uaccess.h> |
| |
| static struct signal_struct init_signals = { |
| .nr_threads = 1, |
| .thread_head = LIST_HEAD_INIT(init_task.thread_node), |
| .wait_chldexit = __WAIT_QUEUE_HEAD_INITIALIZER(init_signals.wait_chldexit), |
| .shared_pending = { |
| .list = LIST_HEAD_INIT(init_signals.shared_pending.list), |
| .signal = {{0}} |
| }, |
| .multiprocess = HLIST_HEAD_INIT, |
| .rlim = INIT_RLIMITS, |
| .cred_guard_mutex = __MUTEX_INITIALIZER(init_signals.cred_guard_mutex), |
| .exec_update_lock = __RWSEM_INITIALIZER(init_signals.exec_update_lock), |
| #ifdef CONFIG_POSIX_TIMERS |
| .posix_timers = LIST_HEAD_INIT(init_signals.posix_timers), |
| .cputimer = { |
| .cputime_atomic = INIT_CPUTIME_ATOMIC, |
| }, |
| #endif |
| INIT_CPU_TIMERS(init_signals) |
| .pids = { |
| [PIDTYPE_PID] = &init_struct_pid, |
| [PIDTYPE_TGID] = &init_struct_pid, |
| [PIDTYPE_PGID] = &init_struct_pid, |
| [PIDTYPE_SID] = &init_struct_pid, |
| }, |
| INIT_PREV_CPUTIME(init_signals) |
| }; |
| |
| static struct sighand_struct init_sighand = { |
| .count = REFCOUNT_INIT(1), |
| .action = { { { .sa_handler = SIG_DFL, } }, }, |
| .siglock = __SPIN_LOCK_UNLOCKED(init_sighand.siglock), |
| .signalfd_wqh = __WAIT_QUEUE_HEAD_INITIALIZER(init_sighand.signalfd_wqh), |
| }; |
| |
| #ifdef CONFIG_SHADOW_CALL_STACK |
| unsigned long init_shadow_call_stack[SCS_SIZE / sizeof(long)] |
| __init_task_data = { |
| [(SCS_SIZE / sizeof(long)) - 1] = SCS_END_MAGIC |
| }; |
| #endif |
| |
| /* |
| * Set up the first task table, touch at your own risk!. Base=0, |
| * limit=0x1fffff (=2MB) |
| */ |
| struct task_struct init_task |
| #ifdef CONFIG_ARCH_TASK_STRUCT_ON_STACK |
| __init_task_data |
| #endif |
| __aligned(L1_CACHE_BYTES) |
| = { |
| #ifdef CONFIG_THREAD_INFO_IN_TASK |
| .thread_info = INIT_THREAD_INFO(init_task), |
| .stack_refcount = REFCOUNT_INIT(1), |
| #endif |
| .__state = 0, |
| .stack = init_stack, |
| .usage = REFCOUNT_INIT(2), |
| .flags = PF_KTHREAD, |
| .prio = MAX_PRIO - 20, |
| .static_prio = MAX_PRIO - 20, |
| .normal_prio = MAX_PRIO - 20, |
| .policy = SCHED_NORMAL, |
| .cpus_ptr = &init_task.cpus_mask, |
| .user_cpus_ptr = NULL, |
| .cpus_mask = CPU_MASK_ALL, |
| .nr_cpus_allowed= NR_CPUS, |
| .mm = NULL, |
| .active_mm = &init_mm, |
| .faults_disabled_mapping = NULL, |
| .restart_block = { |
| .fn = do_no_restart_syscall, |
| }, |
| .se = { |
| .group_node = LIST_HEAD_INIT(init_task.se.group_node), |
| }, |
| .rt = { |
| .run_list = LIST_HEAD_INIT(init_task.rt.run_list), |
| .time_slice = RR_TIMESLICE, |
| }, |
| .tasks = LIST_HEAD_INIT(init_task.tasks), |
| #ifdef CONFIG_SMP |
| .pushable_tasks = PLIST_NODE_INIT(init_task.pushable_tasks, MAX_PRIO), |
| #endif |
| #ifdef CONFIG_CGROUP_SCHED |
| .sched_task_group = &root_task_group, |
| #endif |
| .ptraced = LIST_HEAD_INIT(init_task.ptraced), |
| .ptrace_entry = LIST_HEAD_INIT(init_task.ptrace_entry), |
| .real_parent = &init_task, |
| .parent = &init_task, |
| .children = LIST_HEAD_INIT(init_task.children), |
| .sibling = LIST_HEAD_INIT(init_task.sibling), |
| .group_leader = &init_task, |
| RCU_POINTER_INITIALIZER(real_cred, &init_cred), |
| RCU_POINTER_INITIALIZER(cred, &init_cred), |
| .comm = INIT_TASK_COMM, |
| .thread = INIT_THREAD, |
| .fs = &init_fs, |
| .files = &init_files, |
| #ifdef CONFIG_IO_URING |
| .io_uring = NULL, |
| #endif |
| .signal = &init_signals, |
| .sighand = &init_sighand, |
| .nsproxy = &init_nsproxy, |
| .pending = { |
| .list = LIST_HEAD_INIT(init_task.pending.list), |
| .signal = {{0}} |
| }, |
| .blocked = {{0}}, |
| .alloc_lock = __SPIN_LOCK_UNLOCKED(init_task.alloc_lock), |
| .journal_info = NULL, |
| INIT_CPU_TIMERS(init_task) |
| .pi_lock = __RAW_SPIN_LOCK_UNLOCKED(init_task.pi_lock), |
| .timer_slack_ns = 50000, /* 50 usec default slack */ |
| .thread_pid = &init_struct_pid, |
| .thread_group = LIST_HEAD_INIT(init_task.thread_group), |
| .thread_node = LIST_HEAD_INIT(init_signals.thread_head), |
| #ifdef CONFIG_AUDIT |
| .loginuid = INVALID_UID, |
| .sessionid = AUDIT_SID_UNSET, |
| #endif |
| #ifdef CONFIG_PERF_EVENTS |
| .perf_event_mutex = __MUTEX_INITIALIZER(init_task.perf_event_mutex), |
| .perf_event_list = LIST_HEAD_INIT(init_task.perf_event_list), |
| #endif |
| #ifdef CONFIG_PREEMPT_RCU |
| .rcu_read_lock_nesting = 0, |
| .rcu_read_unlock_special.s = 0, |
| .rcu_node_entry = LIST_HEAD_INIT(init_task.rcu_node_entry), |
| .rcu_blocked_node = NULL, |
| #endif |
| #ifdef CONFIG_TASKS_RCU |
| .rcu_tasks_holdout = false, |
| .rcu_tasks_holdout_list = LIST_HEAD_INIT(init_task.rcu_tasks_holdout_list), |
| .rcu_tasks_idle_cpu = -1, |
| #endif |
| #ifdef CONFIG_TASKS_TRACE_RCU |
| .trc_reader_nesting = 0, |
| .trc_reader_special.s = 0, |
| .trc_holdout_list = LIST_HEAD_INIT(init_task.trc_holdout_list), |
| .trc_blkd_node = LIST_HEAD_INIT(init_task.trc_blkd_node), |
| #endif |
| #ifdef CONFIG_CPUSETS |
| .mems_allowed_seq = SEQCNT_SPINLOCK_ZERO(init_task.mems_allowed_seq, |
| &init_task.alloc_lock), |
| #endif |
| #ifdef CONFIG_RT_MUTEXES |
| .pi_waiters = RB_ROOT_CACHED, |
| .pi_top_task = NULL, |
| #endif |
| INIT_PREV_CPUTIME(init_task) |
| #ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN |
| .vtime.seqcount = SEQCNT_ZERO(init_task.vtime_seqcount), |
| .vtime.starttime = 0, |
| .vtime.state = VTIME_SYS, |
| #endif |
| #ifdef CONFIG_NUMA_BALANCING |
| .numa_preferred_nid = NUMA_NO_NODE, |
| .numa_group = NULL, |
| .numa_faults = NULL, |
| #endif |
| #if defined(CONFIG_KASAN_GENERIC) || defined(CONFIG_KASAN_SW_TAGS) |
| .kasan_depth = 1, |
| #endif |
| #ifdef CONFIG_KCSAN |
| .kcsan_ctx = { |
| .scoped_accesses = {LIST_POISON1, NULL}, |
| }, |
| #endif |
| #ifdef CONFIG_TRACE_IRQFLAGS |
| .softirqs_enabled = 1, |
| #endif |
| #ifdef CONFIG_LOCKDEP |
| .lockdep_depth = 0, /* no locks held yet */ |
| .curr_chain_key = INITIAL_CHAIN_KEY, |
| .lockdep_recursion = 0, |
| #endif |
| #ifdef CONFIG_FUNCTION_GRAPH_TRACER |
| .ret_stack = NULL, |
| .tracing_graph_pause = ATOMIC_INIT(0), |
| #endif |
| #if defined(CONFIG_TRACING) && defined(CONFIG_PREEMPTION) |
| .trace_recursion = 0, |
| #endif |
| #ifdef CONFIG_LIVEPATCH |
| .patch_state = KLP_UNDEFINED, |
| #endif |
| #ifdef CONFIG_SECURITY |
| .security = NULL, |
| #endif |
| #ifdef CONFIG_SECCOMP_FILTER |
| .seccomp = { .filter_count = ATOMIC_INIT(0) }, |
| #endif |
| }; |
| EXPORT_SYMBOL(init_task); |
| |
| /* |
| * Initial thread structure. Alignment of this is handled by a special |
| * linker map entry. |
| */ |
| #ifndef CONFIG_THREAD_INFO_IN_TASK |
| struct thread_info init_thread_info __init_thread_info = INIT_THREAD_INFO(init_task); |
| #endif |
