| | 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 | .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 | #endif |
| | 161 | #ifdef CONFIG_CPUSETS |
| | 162 | .mems_allowed_seq = SEQCNT_SPINLOCK_ZERO(init_task.mems_allowed_seq, |
| | 163 | &init_task.alloc_lock), |
| | 164 | #endif |
| | 165 | #ifdef CONFIG_RT_MUTEXES |
| | 166 | .pi_waiters = RB_ROOT_CACHED, |
| | 167 | .pi_top_task = NULL, |
| | 168 | #endif |
| | 169 | INIT_PREV_CPUTIME(init_task) |
| | 170 | #ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN |
| | 171 | .vtime.seqcount = SEQCNT_ZERO(init_task.vtime_seqcount), |
| | 172 | .vtime.starttime = 0, |
| | 173 | .vtime.state = VTIME_SYS, |
| | 174 | #endif |
| | 175 | #ifdef CONFIG_NUMA_BALANCING |
| | 176 | .numa_preferred_nid = NUMA_NO_NODE, |
| | 177 | .numa_group = NULL, |
| | 178 | .numa_faults = NULL, |
| | 179 | #endif |
| | 180 | #if defined(CONFIG_KASAN_GENERIC) || defined(CONFIG_KASAN_SW_TAGS) |
| | 181 | .kasan_depth = 1, |
| | 182 | #endif |
| | 183 | #ifdef CONFIG_KCSAN |
| | 184 | .kcsan_ctx = { |
| | 185 | .disable_count = 0, |
| | 186 | .atomic_next = 0, |
| | 187 | .atomic_nest_count = 0, |
| | 188 | .in_flat_atomic = false, |
| | 189 | .access_mask = 0, |
| | 190 | .scoped_accesses = {LIST_POISON1, NULL}, |
| | 191 | }, |
| | 192 | #endif |
| | 193 | #ifdef CONFIG_TRACE_IRQFLAGS |
| | 194 | .softirqs_enabled = 1, |
| | 195 | #endif |
| | 196 | #ifdef CONFIG_LOCKDEP |
| | 197 | .lockdep_depth = 0, /* no locks held yet */ |
| | 198 | .curr_chain_key = INITIAL_CHAIN_KEY, |
| | 199 | .lockdep_recursion = 0, |
| | 200 | #endif |
| | 201 | #ifdef CONFIG_FUNCTION_GRAPH_TRACER |
| | 202 | .ret_stack = NULL, |
| | 203 | .tracing_graph_pause = ATOMIC_INIT(0), |
| | 204 | #endif |
| | 205 | #if defined(CONFIG_TRACING) && defined(CONFIG_PREEMPTION) |
| | 206 | .trace_recursion = 0, |
| | 207 | #endif |
| | 208 | #ifdef CONFIG_LIVEPATCH |
| | 209 | .patch_state = KLP_UNDEFINED, |
| | 210 | #endif |
| | 211 | #ifdef CONFIG_SECURITY |
| | 212 | .security = NULL, |
| | 213 | #endif |
| | 214 | #ifdef CONFIG_SECCOMP_FILTER |
| | 215 | .seccomp = { .filter_count = ATOMIC_INIT(0) }, |
| | 216 | #endif |
| | 217 | }; |
| | 218 | EXPORT_SYMBOL(init_task); |
| | 219 | |
| | 220 | /* |
| | 221 | * Initial thread structure. Alignment of this is handled by a special |
| | 222 | * linker map entry. |
| | 223 | */ |
| | 224 | #ifndef CONFIG_THREAD_INFO_IN_TASK |
| | 225 | struct thread_info init_thread_info __init_thread_info = INIT_THREAD_INFO(init_task); |
| | 226 | #endif |
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