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