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 <linux/sched/autogroup.h> 16 #include <net/net_namespace.h> 17 #include <linux/sched/rt.h> 18 #include <linux/mm_types.h> 19 20 #include <asm/thread_info.h> 21 22 #ifdef CONFIG_SMP 23 # define INIT_PUSHABLE_TASKS(tsk) \ 24 .pushable_tasks = PLIST_NODE_INIT(tsk.pushable_tasks, MAX_PRIO), 25 #else 26 # define INIT_PUSHABLE_TASKS(tsk) 27 #endif 28 29 extern struct files_struct init_files; 30 extern struct fs_struct init_fs; 31 32 #ifdef CONFIG_CPUSETS 33 #define INIT_CPUSET_SEQ(tsk) \ 34 .mems_allowed_seq = SEQCNT_ZERO(tsk.mems_allowed_seq), 35 #else 36 #define INIT_CPUSET_SEQ(tsk) 37 #endif 38 39 #ifndef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE 40 #define INIT_PREV_CPUTIME(x) .prev_cputime = { \ 41 .lock = __RAW_SPIN_LOCK_UNLOCKED(x.prev_cputime.lock), \ 42 }, 43 #else 44 #define INIT_PREV_CPUTIME(x) 45 #endif 46 47 #ifdef CONFIG_POSIX_TIMERS 48 #define INIT_POSIX_TIMERS(s) \ 49 .posix_timers = LIST_HEAD_INIT(s.posix_timers), 50 #define INIT_CPU_TIMERS(s) \ 51 .cpu_timers = { \ 52 LIST_HEAD_INIT(s.cpu_timers[0]), \ 53 LIST_HEAD_INIT(s.cpu_timers[1]), \ 54 LIST_HEAD_INIT(s.cpu_timers[2]), \ 55 }, 56 #define INIT_CPUTIMER(s) \ 57 .cputimer = { \ 58 .cputime_atomic = INIT_CPUTIME_ATOMIC, \ 59 .running = false, \ 60 .checking_timer = false, \ 61 }, 62 #else 63 #define INIT_POSIX_TIMERS(s) 64 #define INIT_CPU_TIMERS(s) 65 #define INIT_CPUTIMER(s) 66 #endif 67 68 #define INIT_SIGNALS(sig) { \ 69 .nr_threads = 1, \ 70 .thread_head = LIST_HEAD_INIT(init_task.thread_node), \ 71 .wait_chldexit = __WAIT_QUEUE_HEAD_INITIALIZER(sig.wait_chldexit),\ 72 .shared_pending = { \ 73 .list = LIST_HEAD_INIT(sig.shared_pending.list), \ 74 .signal = {{0}}}, \ 75 INIT_POSIX_TIMERS(sig) \ 76 INIT_CPU_TIMERS(sig) \ 77 .rlim = INIT_RLIMITS, \ 78 INIT_CPUTIMER(sig) \ 79 INIT_PREV_CPUTIME(sig) \ 80 .cred_guard_mutex = \ 81 __MUTEX_INITIALIZER(sig.cred_guard_mutex), \ 82 } 83 84 extern struct nsproxy init_nsproxy; 85 86 #define INIT_SIGHAND(sighand) { \ 87 .count = ATOMIC_INIT(1), \ 88 .action = { { { .sa_handler = SIG_DFL, } }, }, \ 89 .siglock = __SPIN_LOCK_UNLOCKED(sighand.siglock), \ 90 .signalfd_wqh = __WAIT_QUEUE_HEAD_INITIALIZER(sighand.signalfd_wqh), \ 91 } 92 93 extern struct group_info init_groups; 94 95 #define INIT_STRUCT_PID { \ 96 .count = ATOMIC_INIT(1), \ 97 .tasks = { \ 98 { .first = NULL }, \ 99 { .first = NULL }, \ 100 { .first = NULL }, \ 101 }, \ 102 .level = 0, \ 103 .numbers = { { \ 104 .nr = 0, \ 105 .ns = &init_pid_ns, \ 106 .pid_chain = { .next = NULL, .pprev = NULL }, \ 107 }, } \ 108 } 109 110 #define INIT_PID_LINK(type) \ 111 { \ 112 .node = { \ 113 .next = NULL, \ 114 .pprev = NULL, \ 115 }, \ 116 .pid = &init_struct_pid, \ 117 } 118 119 #ifdef CONFIG_AUDITSYSCALL 120 #define INIT_IDS \ 121 .loginuid = INVALID_UID, \ 122 .sessionid = (unsigned int)-1, 123 #else 124 #define INIT_IDS 125 #endif 126 127 #ifdef CONFIG_PREEMPT_RCU 128 #define INIT_TASK_RCU_TREE_PREEMPT() \ 129 .rcu_blocked_node = NULL, 130 #else 131 #define INIT_TASK_RCU_TREE_PREEMPT(tsk) 132 #endif 133 #ifdef CONFIG_PREEMPT_RCU 134 #define INIT_TASK_RCU_PREEMPT(tsk) \ 135 .rcu_read_lock_nesting = 0, \ 136 .rcu_read_unlock_special.s = 0, \ 137 .rcu_node_entry = LIST_HEAD_INIT(tsk.rcu_node_entry), \ 138 INIT_TASK_RCU_TREE_PREEMPT() 139 #else 140 #define INIT_TASK_RCU_PREEMPT(tsk) 141 #endif 142 #ifdef CONFIG_TASKS_RCU 143 #define INIT_TASK_RCU_TASKS(tsk) \ 144 .rcu_tasks_holdout = false, \ 145 .rcu_tasks_holdout_list = \ 146 LIST_HEAD_INIT(tsk.rcu_tasks_holdout_list), \ 147 .rcu_tasks_idle_cpu = -1, 148 #else 149 #define INIT_TASK_RCU_TASKS(tsk) 150 #endif 151 152 extern struct cred init_cred; 153 154 #ifdef CONFIG_CGROUP_SCHED 155 # define INIT_CGROUP_SCHED(tsk) \ 156 .sched_task_group = &root_task_group, 157 #else 158 # define INIT_CGROUP_SCHED(tsk) 159 #endif 160 161 #ifdef CONFIG_PERF_EVENTS 162 # define INIT_PERF_EVENTS(tsk) \ 163 .perf_event_mutex = \ 164 __MUTEX_INITIALIZER(tsk.perf_event_mutex), \ 165 .perf_event_list = LIST_HEAD_INIT(tsk.perf_event_list), 166 #else 167 # define INIT_PERF_EVENTS(tsk) 168 #endif 169 170 #ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN 171 # define INIT_VTIME(tsk) \ 172 .vtime_seqcount = SEQCNT_ZERO(tsk.vtime_seqcount), \ 173 .vtime_snap = 0, \ 174 .vtime_snap_whence = VTIME_SYS, 175 #else 176 # define INIT_VTIME(tsk) 177 #endif 178 179 #define INIT_TASK_COMM "swapper" 180 181 #ifdef CONFIG_RT_MUTEXES 182 # define INIT_RT_MUTEXES(tsk) \ 183 .pi_waiters = RB_ROOT, \ 184 .pi_top_task = NULL, \ 185 .pi_waiters_leftmost = NULL, 186 #else 187 # define INIT_RT_MUTEXES(tsk) 188 #endif 189 190 #ifdef CONFIG_NUMA_BALANCING 191 # define INIT_NUMA_BALANCING(tsk) \ 192 .numa_preferred_nid = -1, \ 193 .numa_group = NULL, \ 194 .numa_faults = NULL, 195 #else 196 # define INIT_NUMA_BALANCING(tsk) 197 #endif 198 199 #ifdef CONFIG_KASAN 200 # define INIT_KASAN(tsk) \ 201 .kasan_depth = 1, 202 #else 203 # define INIT_KASAN(tsk) 204 #endif 205 206 #ifdef CONFIG_THREAD_INFO_IN_TASK 207 # define INIT_TASK_TI(tsk) \ 208 .thread_info = INIT_THREAD_INFO(tsk), \ 209 .stack_refcount = ATOMIC_INIT(1), 210 #else 211 # define INIT_TASK_TI(tsk) 212 #endif 213 214 /* 215 * INIT_TASK is used to set up the first task table, touch at 216 * your own risk!. Base=0, limit=0x1fffff (=2MB) 217 */ 218 #define INIT_TASK(tsk) \ 219 { \ 220 INIT_TASK_TI(tsk) \ 221 .state = 0, \ 222 .stack = init_stack, \ 223 .usage = ATOMIC_INIT(2), \ 224 .flags = PF_KTHREAD, \ 225 .prio = MAX_PRIO-20, \ 226 .static_prio = MAX_PRIO-20, \ 227 .normal_prio = MAX_PRIO-20, \ 228 .policy = SCHED_NORMAL, \ 229 .cpus_allowed = CPU_MASK_ALL, \ 230 .nr_cpus_allowed= NR_CPUS, \ 231 .mm = NULL, \ 232 .active_mm = &init_mm, \ 233 .restart_block = { \ 234 .fn = do_no_restart_syscall, \ 235 }, \ 236 .se = { \ 237 .group_node = LIST_HEAD_INIT(tsk.se.group_node), \ 238 }, \ 239 .rt = { \ 240 .run_list = LIST_HEAD_INIT(tsk.rt.run_list), \ 241 .time_slice = RR_TIMESLICE, \ 242 }, \ 243 .tasks = LIST_HEAD_INIT(tsk.tasks), \ 244 INIT_PUSHABLE_TASKS(tsk) \ 245 INIT_CGROUP_SCHED(tsk) \ 246 .ptraced = LIST_HEAD_INIT(tsk.ptraced), \ 247 .ptrace_entry = LIST_HEAD_INIT(tsk.ptrace_entry), \ 248 .real_parent = &tsk, \ 249 .parent = &tsk, \ 250 .children = LIST_HEAD_INIT(tsk.children), \ 251 .sibling = LIST_HEAD_INIT(tsk.sibling), \ 252 .group_leader = &tsk, \ 253 RCU_POINTER_INITIALIZER(real_cred, &init_cred), \ 254 RCU_POINTER_INITIALIZER(cred, &init_cred), \ 255 .comm = INIT_TASK_COMM, \ 256 .thread = INIT_THREAD, \ 257 .fs = &init_fs, \ 258 .files = &init_files, \ 259 .signal = &init_signals, \ 260 .sighand = &init_sighand, \ 261 .nsproxy = &init_nsproxy, \ 262 .pending = { \ 263 .list = LIST_HEAD_INIT(tsk.pending.list), \ 264 .signal = {{0}}}, \ 265 .blocked = {{0}}, \ 266 .alloc_lock = __SPIN_LOCK_UNLOCKED(tsk.alloc_lock), \ 267 .journal_info = NULL, \ 268 INIT_CPU_TIMERS(tsk) \ 269 .pi_lock = __RAW_SPIN_LOCK_UNLOCKED(tsk.pi_lock), \ 270 .timer_slack_ns = 50000, /* 50 usec default slack */ \ 271 .pids = { \ 272 [PIDTYPE_PID] = INIT_PID_LINK(PIDTYPE_PID), \ 273 [PIDTYPE_PGID] = INIT_PID_LINK(PIDTYPE_PGID), \ 274 [PIDTYPE_SID] = INIT_PID_LINK(PIDTYPE_SID), \ 275 }, \ 276 .thread_group = LIST_HEAD_INIT(tsk.thread_group), \ 277 .thread_node = LIST_HEAD_INIT(init_signals.thread_head), \ 278 INIT_IDS \ 279 INIT_PERF_EVENTS(tsk) \ 280 INIT_TRACE_IRQFLAGS \ 281 INIT_LOCKDEP \ 282 INIT_FTRACE_GRAPH \ 283 INIT_TRACE_RECURSION \ 284 INIT_TASK_RCU_PREEMPT(tsk) \ 285 INIT_TASK_RCU_TASKS(tsk) \ 286 INIT_CPUSET_SEQ(tsk) \ 287 INIT_RT_MUTEXES(tsk) \ 288 INIT_PREV_CPUTIME(tsk) \ 289 INIT_VTIME(tsk) \ 290 INIT_NUMA_BALANCING(tsk) \ 291 INIT_KASAN(tsk) \ 292 } 293 294 295 /* Attach to the init_task data structure for proper alignment */ 296 #define __init_task_data __attribute__((__section__(".data..init_task"))) 297 298 299 #endif 300