1 #ifndef _LINUX__INIT_TASK_H 2 #define _LINUX__INIT_TASK_H 3 4 #include <linux/rcupdate.h> 5 #include <linux/irqflags.h> 6 #include <linux/utsname.h> 7 #include <linux/lockdep.h> 8 #include <linux/ftrace.h> 9 #include <linux/ipc.h> 10 #include <linux/pid_namespace.h> 11 #include <linux/user_namespace.h> 12 #include <linux/securebits.h> 13 #include <linux/seqlock.h> 14 #include <linux/rbtree.h> 15 #include <net/net_namespace.h> 16 #include <linux/sched/rt.h> 17 18 #ifdef CONFIG_SMP 19 # define INIT_PUSHABLE_TASKS(tsk) \ 20 .pushable_tasks = PLIST_NODE_INIT(tsk.pushable_tasks, MAX_PRIO), 21 #else 22 # define INIT_PUSHABLE_TASKS(tsk) 23 #endif 24 25 extern struct files_struct init_files; 26 extern struct fs_struct init_fs; 27 28 #ifdef CONFIG_CPUSETS 29 #define INIT_CPUSET_SEQ(tsk) \ 30 .mems_allowed_seq = SEQCNT_ZERO(tsk.mems_allowed_seq), 31 #else 32 #define INIT_CPUSET_SEQ(tsk) 33 #endif 34 35 #define INIT_SIGNALS(sig) { \ 36 .nr_threads = 1, \ 37 .thread_head = LIST_HEAD_INIT(init_task.thread_node), \ 38 .wait_chldexit = __WAIT_QUEUE_HEAD_INITIALIZER(sig.wait_chldexit),\ 39 .shared_pending = { \ 40 .list = LIST_HEAD_INIT(sig.shared_pending.list), \ 41 .signal = {{0}}}, \ 42 .posix_timers = LIST_HEAD_INIT(sig.posix_timers), \ 43 .cpu_timers = INIT_CPU_TIMERS(sig.cpu_timers), \ 44 .rlim = INIT_RLIMITS, \ 45 .cputimer = { \ 46 .cputime_atomic = INIT_CPUTIME_ATOMIC, \ 47 .running = 0, \ 48 }, \ 49 .cred_guard_mutex = \ 50 __MUTEX_INITIALIZER(sig.cred_guard_mutex), \ 51 } 52 53 extern struct nsproxy init_nsproxy; 54 55 #define INIT_SIGHAND(sighand) { \ 56 .count = ATOMIC_INIT(1), \ 57 .action = { { { .sa_handler = SIG_DFL, } }, }, \ 58 .siglock = __SPIN_LOCK_UNLOCKED(sighand.siglock), \ 59 .signalfd_wqh = __WAIT_QUEUE_HEAD_INITIALIZER(sighand.signalfd_wqh), \ 60 } 61 62 extern struct group_info init_groups; 63 64 #define INIT_STRUCT_PID { \ 65 .count = ATOMIC_INIT(1), \ 66 .tasks = { \ 67 { .first = NULL }, \ 68 { .first = NULL }, \ 69 { .first = NULL }, \ 70 }, \ 71 .level = 0, \ 72 .numbers = { { \ 73 .nr = 0, \ 74 .ns = &init_pid_ns, \ 75 .pid_chain = { .next = NULL, .pprev = NULL }, \ 76 }, } \ 77 } 78 79 #define INIT_PID_LINK(type) \ 80 { \ 81 .node = { \ 82 .next = NULL, \ 83 .pprev = NULL, \ 84 }, \ 85 .pid = &init_struct_pid, \ 86 } 87 88 #ifdef CONFIG_AUDITSYSCALL 89 #define INIT_IDS \ 90 .loginuid = INVALID_UID, \ 91 .sessionid = (unsigned int)-1, 92 #else 93 #define INIT_IDS 94 #endif 95 96 #ifdef CONFIG_PREEMPT_RCU 97 #define INIT_TASK_RCU_TREE_PREEMPT() \ 98 .rcu_blocked_node = NULL, 99 #else 100 #define INIT_TASK_RCU_TREE_PREEMPT(tsk) 101 #endif 102 #ifdef CONFIG_PREEMPT_RCU 103 #define INIT_TASK_RCU_PREEMPT(tsk) \ 104 .rcu_read_lock_nesting = 0, \ 105 .rcu_read_unlock_special.s = 0, \ 106 .rcu_node_entry = LIST_HEAD_INIT(tsk.rcu_node_entry), \ 107 INIT_TASK_RCU_TREE_PREEMPT() 108 #else 109 #define INIT_TASK_RCU_PREEMPT(tsk) 110 #endif 111 #ifdef CONFIG_TASKS_RCU 112 #define INIT_TASK_RCU_TASKS(tsk) \ 113 .rcu_tasks_holdout = false, \ 114 .rcu_tasks_holdout_list = \ 115 LIST_HEAD_INIT(tsk.rcu_tasks_holdout_list), \ 116 .rcu_tasks_idle_cpu = -1, 117 #else 118 #define INIT_TASK_RCU_TASKS(tsk) 119 #endif 120 121 extern struct cred init_cred; 122 123 extern struct task_group root_task_group; 124 125 #ifdef CONFIG_CGROUP_SCHED 126 # define INIT_CGROUP_SCHED(tsk) \ 127 .sched_task_group = &root_task_group, 128 #else 129 # define INIT_CGROUP_SCHED(tsk) 130 #endif 131 132 #ifdef CONFIG_PERF_EVENTS 133 # define INIT_PERF_EVENTS(tsk) \ 134 .perf_event_mutex = \ 135 __MUTEX_INITIALIZER(tsk.perf_event_mutex), \ 136 .perf_event_list = LIST_HEAD_INIT(tsk.perf_event_list), 137 #else 138 # define INIT_PERF_EVENTS(tsk) 139 #endif 140 141 #ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN 142 # define INIT_VTIME(tsk) \ 143 .vtime_seqlock = __SEQLOCK_UNLOCKED(tsk.vtime_seqlock), \ 144 .vtime_snap = 0, \ 145 .vtime_snap_whence = VTIME_SYS, 146 #else 147 # define INIT_VTIME(tsk) 148 #endif 149 150 #define INIT_TASK_COMM "swapper" 151 152 #ifdef CONFIG_RT_MUTEXES 153 # define INIT_RT_MUTEXES(tsk) \ 154 .pi_waiters = RB_ROOT, \ 155 .pi_waiters_leftmost = NULL, 156 #else 157 # define INIT_RT_MUTEXES(tsk) 158 #endif 159 160 #ifdef CONFIG_NUMA_BALANCING 161 # define INIT_NUMA_BALANCING(tsk) \ 162 .numa_preferred_nid = -1, \ 163 .numa_group = NULL, \ 164 .numa_faults = NULL, 165 #else 166 # define INIT_NUMA_BALANCING(tsk) 167 #endif 168 169 #ifdef CONFIG_KASAN 170 # define INIT_KASAN(tsk) \ 171 .kasan_depth = 1, 172 #else 173 # define INIT_KASAN(tsk) 174 #endif 175 176 /* 177 * INIT_TASK is used to set up the first task table, touch at 178 * your own risk!. Base=0, limit=0x1fffff (=2MB) 179 */ 180 #define INIT_TASK(tsk) \ 181 { \ 182 .state = 0, \ 183 .stack = &init_thread_info, \ 184 .usage = ATOMIC_INIT(2), \ 185 .flags = PF_KTHREAD, \ 186 .prio = MAX_PRIO-20, \ 187 .static_prio = MAX_PRIO-20, \ 188 .normal_prio = MAX_PRIO-20, \ 189 .policy = SCHED_NORMAL, \ 190 .cpus_allowed = CPU_MASK_ALL, \ 191 .nr_cpus_allowed= NR_CPUS, \ 192 .mm = NULL, \ 193 .active_mm = &init_mm, \ 194 .restart_block = { \ 195 .fn = do_no_restart_syscall, \ 196 }, \ 197 .se = { \ 198 .group_node = LIST_HEAD_INIT(tsk.se.group_node), \ 199 }, \ 200 .rt = { \ 201 .run_list = LIST_HEAD_INIT(tsk.rt.run_list), \ 202 .time_slice = RR_TIMESLICE, \ 203 }, \ 204 .tasks = LIST_HEAD_INIT(tsk.tasks), \ 205 INIT_PUSHABLE_TASKS(tsk) \ 206 INIT_CGROUP_SCHED(tsk) \ 207 .ptraced = LIST_HEAD_INIT(tsk.ptraced), \ 208 .ptrace_entry = LIST_HEAD_INIT(tsk.ptrace_entry), \ 209 .real_parent = &tsk, \ 210 .parent = &tsk, \ 211 .children = LIST_HEAD_INIT(tsk.children), \ 212 .sibling = LIST_HEAD_INIT(tsk.sibling), \ 213 .group_leader = &tsk, \ 214 RCU_POINTER_INITIALIZER(real_cred, &init_cred), \ 215 RCU_POINTER_INITIALIZER(cred, &init_cred), \ 216 .comm = INIT_TASK_COMM, \ 217 .thread = INIT_THREAD, \ 218 .fs = &init_fs, \ 219 .files = &init_files, \ 220 .signal = &init_signals, \ 221 .sighand = &init_sighand, \ 222 .nsproxy = &init_nsproxy, \ 223 .pending = { \ 224 .list = LIST_HEAD_INIT(tsk.pending.list), \ 225 .signal = {{0}}}, \ 226 .blocked = {{0}}, \ 227 .alloc_lock = __SPIN_LOCK_UNLOCKED(tsk.alloc_lock), \ 228 .journal_info = NULL, \ 229 .cpu_timers = INIT_CPU_TIMERS(tsk.cpu_timers), \ 230 .pi_lock = __RAW_SPIN_LOCK_UNLOCKED(tsk.pi_lock), \ 231 .timer_slack_ns = 50000, /* 50 usec default slack */ \ 232 .pids = { \ 233 [PIDTYPE_PID] = INIT_PID_LINK(PIDTYPE_PID), \ 234 [PIDTYPE_PGID] = INIT_PID_LINK(PIDTYPE_PGID), \ 235 [PIDTYPE_SID] = INIT_PID_LINK(PIDTYPE_SID), \ 236 }, \ 237 .thread_group = LIST_HEAD_INIT(tsk.thread_group), \ 238 .thread_node = LIST_HEAD_INIT(init_signals.thread_head), \ 239 INIT_IDS \ 240 INIT_PERF_EVENTS(tsk) \ 241 INIT_TRACE_IRQFLAGS \ 242 INIT_LOCKDEP \ 243 INIT_FTRACE_GRAPH \ 244 INIT_TRACE_RECURSION \ 245 INIT_TASK_RCU_PREEMPT(tsk) \ 246 INIT_TASK_RCU_TASKS(tsk) \ 247 INIT_CPUSET_SEQ(tsk) \ 248 INIT_RT_MUTEXES(tsk) \ 249 INIT_VTIME(tsk) \ 250 INIT_NUMA_BALANCING(tsk) \ 251 INIT_KASAN(tsk) \ 252 } 253 254 255 #define INIT_CPU_TIMERS(cpu_timers) \ 256 { \ 257 LIST_HEAD_INIT(cpu_timers[0]), \ 258 LIST_HEAD_INIT(cpu_timers[1]), \ 259 LIST_HEAD_INIT(cpu_timers[2]), \ 260 } 261 262 /* Attach to the init_task data structure for proper alignment */ 263 #define __init_task_data __attribute__((__section__(".data..init_task"))) 264 265 266 #endif 267