| 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 | .cpus_mask = CPU_MASK_ALL, |
| 84 | .nr_cpus_allowed= NR_CPUS, |
| 85 | .mm = NULL, |
| 86 | .active_mm = &init_mm, |
| 87 | .restart_block = { |
| 88 | .fn = do_no_restart_syscall, |
| 89 | }, |
| 90 | .se = { |
| 91 | .group_node = LIST_HEAD_INIT(init_task.se.group_node), |
| 92 | }, |
| 93 | .rt = { |
| 94 | .run_list = LIST_HEAD_INIT(init_task.rt.run_list), |
| 95 | .time_slice = RR_TIMESLICE, |
| 96 | }, |
| 97 | .tasks = LIST_HEAD_INIT(init_task.tasks), |
| 98 | #ifdef CONFIG_SMP |
| 99 | .pushable_tasks = PLIST_NODE_INIT(init_task.pushable_tasks, MAX_PRIO), |
| 100 | #endif |
| 101 | #ifdef CONFIG_CGROUP_SCHED |
| 102 | .sched_task_group = &root_task_group, |
| 103 | #endif |
| 104 | .ptraced = LIST_HEAD_INIT(init_task.ptraced), |
| 105 | .ptrace_entry = LIST_HEAD_INIT(init_task.ptrace_entry), |
| 106 | .real_parent = &init_task, |
| 107 | .parent = &init_task, |
| 108 | .children = LIST_HEAD_INIT(init_task.children), |
| 109 | .sibling = LIST_HEAD_INIT(init_task.sibling), |
| 110 | .group_leader = &init_task, |
| 111 | RCU_POINTER_INITIALIZER(real_cred, &init_cred), |
| 112 | RCU_POINTER_INITIALIZER(cred, &init_cred), |
| 113 | .comm = INIT_TASK_COMM, |
| 114 | .thread = INIT_THREAD, |
| 115 | .fs = &init_fs, |
| 116 | .files = &init_files, |
| 117 | #ifdef CONFIG_IO_URING |
| 118 | .io_uring = NULL, |
| 119 | #endif |
| 120 | .signal = &init_signals, |
| 121 | .sighand = &init_sighand, |
| 122 | .nsproxy = &init_nsproxy, |
| 123 | .pending = { |
| 124 | .list = LIST_HEAD_INIT(init_task.pending.list), |
| 125 | .signal = {{0}} |
| 126 | }, |
| 127 | .blocked = {{0}}, |
| 128 | .alloc_lock = __SPIN_LOCK_UNLOCKED(init_task.alloc_lock), |
| 129 | .journal_info = NULL, |
| 130 | INIT_CPU_TIMERS(init_task) |
| 131 | .pi_lock = __RAW_SPIN_LOCK_UNLOCKED(init_task.pi_lock), |
| 132 | .timer_slack_ns = 50000, /* 50 usec default slack */ |
| 133 | .thread_pid = &init_struct_pid, |
| 134 | .thread_group = LIST_HEAD_INIT(init_task.thread_group), |
| 135 | .thread_node = LIST_HEAD_INIT(init_signals.thread_head), |
| 136 | #ifdef CONFIG_AUDIT |
| 137 | .loginuid = INVALID_UID, |
| 138 | .sessionid = AUDIT_SID_UNSET, |
| 139 | #endif |
| 140 | #ifdef CONFIG_PERF_EVENTS |
| 141 | .perf_event_mutex = __MUTEX_INITIALIZER(init_task.perf_event_mutex), |
| 142 | .perf_event_list = LIST_HEAD_INIT(init_task.perf_event_list), |
| 143 | #endif |
| 144 | #ifdef CONFIG_PREEMPT_RCU |
| 145 | .rcu_read_lock_nesting = 0, |
| 146 | .rcu_read_unlock_special.s = 0, |
| 147 | .rcu_node_entry = LIST_HEAD_INIT(init_task.rcu_node_entry), |
| 148 | .rcu_blocked_node = NULL, |
| 149 | #endif |
| 150 | #ifdef CONFIG_TASKS_RCU |
| 151 | .rcu_tasks_holdout = false, |
| 152 | .rcu_tasks_holdout_list = LIST_HEAD_INIT(init_task.rcu_tasks_holdout_list), |
| 153 | .rcu_tasks_idle_cpu = -1, |
| 154 | #endif |
| 155 | #ifdef CONFIG_TASKS_TRACE_RCU |
| 156 | .trc_reader_nesting = 0, |
| 157 | .trc_reader_special.s = 0, |
| 158 | .trc_holdout_list = LIST_HEAD_INIT(init_task.trc_holdout_list), |
| 159 | #endif |
| 160 | #ifdef CONFIG_CPUSETS |
| 161 | .mems_allowed_seq = SEQCNT_SPINLOCK_ZERO(init_task.mems_allowed_seq, |
| 162 | &init_task.alloc_lock), |
| 163 | #endif |
| 164 | #ifdef CONFIG_RT_MUTEXES |
| 165 | .pi_waiters = RB_ROOT_CACHED, |
| 166 | .pi_top_task = NULL, |
| 167 | #endif |
| 168 | INIT_PREV_CPUTIME(init_task) |
| 169 | #ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN |
| 170 | .vtime.seqcount = SEQCNT_ZERO(init_task.vtime_seqcount), |
| 171 | .vtime.starttime = 0, |
| 172 | .vtime.state = VTIME_SYS, |
| 173 | #endif |
| 174 | #ifdef CONFIG_NUMA_BALANCING |
| 175 | .numa_preferred_nid = NUMA_NO_NODE, |
| 176 | .numa_group = NULL, |
| 177 | .numa_faults = NULL, |
| 178 | #endif |
| 179 | #if defined(CONFIG_KASAN_GENERIC) || defined(CONFIG_KASAN_SW_TAGS) |
| 180 | .kasan_depth = 1, |
| 181 | #endif |
| 182 | #ifdef CONFIG_KCSAN |
| 183 | .kcsan_ctx = { |
| 184 | .disable_count = 0, |
| 185 | .atomic_next = 0, |
| 186 | .atomic_nest_count = 0, |
| 187 | .in_flat_atomic = false, |
| 188 | .access_mask = 0, |
| 189 | .scoped_accesses = {LIST_POISON1, NULL}, |
| 190 | }, |
| 191 | #endif |
| 192 | #ifdef CONFIG_TRACE_IRQFLAGS |
| 193 | .softirqs_enabled = 1, |
| 194 | #endif |
| 195 | #ifdef CONFIG_LOCKDEP |
| 196 | .lockdep_depth = 0, /* no locks held yet */ |
| 197 | .curr_chain_key = INITIAL_CHAIN_KEY, |
| 198 | .lockdep_recursion = 0, |
| 199 | #endif |
| 200 | #ifdef CONFIG_FUNCTION_GRAPH_TRACER |
| 201 | .ret_stack = NULL, |
| 202 | .tracing_graph_pause = ATOMIC_INIT(0), |
| 203 | #endif |
| 204 | #if defined(CONFIG_TRACING) && defined(CONFIG_PREEMPTION) |
| 205 | .trace_recursion = 0, |
| 206 | #endif |
| 207 | #ifdef CONFIG_LIVEPATCH |
| 208 | .patch_state = KLP_UNDEFINED, |
| 209 | #endif |
| 210 | #ifdef CONFIG_SECURITY |
| 211 | .security = NULL, |
| 212 | #endif |
| 213 | #ifdef CONFIG_SECCOMP_FILTER |
| 214 | .seccomp = { .filter_count = ATOMIC_INIT(0) }, |
| 215 | #endif |
| 216 | }; |
| 217 | EXPORT_SYMBOL(init_task); |
| 218 | |
| 219 | /* |
| 220 | * Initial thread structure. Alignment of this is handled by a special |
| 221 | * linker map entry. |
| 222 | */ |
| 223 | #ifndef CONFIG_THREAD_INFO_IN_TASK |
| 224 | struct thread_info init_thread_info __init_thread_info = INIT_THREAD_INFO(init_task); |
| 225 | #endif |