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 19 #include <asm/thread_info.h> 20 21 #ifdef CONFIG_SMP 22 # define INIT_PUSHABLE_TASKS(tsk) \ 23 .pushable_tasks = PLIST_NODE_INIT(tsk.pushable_tasks, MAX_PRIO), 24 #else 25 # define INIT_PUSHABLE_TASKS(tsk) 26 #endif 27 28 extern struct files_struct init_files; 29 extern struct fs_struct init_fs; 30 31 #ifdef CONFIG_CPUSETS 32 #define INIT_CPUSET_SEQ(tsk) \ 33 .mems_allowed_seq = SEQCNT_ZERO(tsk.mems_allowed_seq), 34 #else 35 #define INIT_CPUSET_SEQ(tsk) 36 #endif 37 38 #ifndef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE 39 #define INIT_PREV_CPUTIME(x) .prev_cputime = { \ 40 .lock = __RAW_SPIN_LOCK_UNLOCKED(x.prev_cputime.lock), \ 41 }, 42 #else 43 #define INIT_PREV_CPUTIME(x) 44 #endif 45 46 #ifdef CONFIG_POSIX_TIMERS 47 #define INIT_POSIX_TIMERS(s) \ 48 .posix_timers = LIST_HEAD_INIT(s.posix_timers), 49 #define INIT_CPU_TIMERS(s) \ 50 .cpu_timers = { \ 51 LIST_HEAD_INIT(s.cpu_timers[0]), \ 52 LIST_HEAD_INIT(s.cpu_timers[1]), \ 53 LIST_HEAD_INIT(s.cpu_timers[2]), \ 54 }, 55 #define INIT_CPUTIMER(s) \ 56 .cputimer = { \ 57 .cputime_atomic = INIT_CPUTIME_ATOMIC, \ 58 .running = false, \ 59 .checking_timer = false, \ 60 }, 61 #else 62 #define INIT_POSIX_TIMERS(s) 63 #define INIT_CPU_TIMERS(s) 64 #define INIT_CPUTIMER(s) 65 #endif 66 67 #define INIT_SIGNALS(sig) { \ 68 .nr_threads = 1, \ 69 .thread_head = LIST_HEAD_INIT(init_task.thread_node), \ 70 .wait_chldexit = __WAIT_QUEUE_HEAD_INITIALIZER(sig.wait_chldexit),\ 71 .shared_pending = { \ 72 .list = LIST_HEAD_INIT(sig.shared_pending.list), \ 73 .signal = {{0}}}, \ 74 INIT_POSIX_TIMERS(sig) \ 75 INIT_CPU_TIMERS(sig) \ 76 .rlim = INIT_RLIMITS, \ 77 INIT_CPUTIMER(sig) \ 78 INIT_PREV_CPUTIME(sig) \ 79 .cred_guard_mutex = \ 80 __MUTEX_INITIALIZER(sig.cred_guard_mutex), \ 81 } 82 83 extern struct nsproxy init_nsproxy; 84 85 #define INIT_SIGHAND(sighand) { \ 86 .count = ATOMIC_INIT(1), \ 87 .action = { { { .sa_handler = SIG_DFL, } }, }, \ 88 .siglock = __SPIN_LOCK_UNLOCKED(sighand.siglock), \ 89 .signalfd_wqh = __WAIT_QUEUE_HEAD_INITIALIZER(sighand.signalfd_wqh), \ 90 } 91 92 extern struct group_info init_groups; 93 94 #define INIT_STRUCT_PID { \ 95 .count = ATOMIC_INIT(1), \ 96 .tasks = { \ 97 { .first = NULL }, \ 98 { .first = NULL }, \ 99 { .first = NULL }, \ 100 }, \ 101 .level = 0, \ 102 .numbers = { { \ 103 .nr = 0, \ 104 .ns = &init_pid_ns, \ 105 .pid_chain = { .next = NULL, .pprev = NULL }, \ 106 }, } \ 107 } 108 109 #define INIT_PID_LINK(type) \ 110 { \ 111 .node = { \ 112 .next = NULL, \ 113 .pprev = NULL, \ 114 }, \ 115 .pid = &init_struct_pid, \ 116 } 117 118 #ifdef CONFIG_AUDITSYSCALL 119 #define INIT_IDS \ 120 .loginuid = INVALID_UID, \ 121 .sessionid = (unsigned int)-1, 122 #else 123 #define INIT_IDS 124 #endif 125 126 #ifdef CONFIG_PREEMPT_RCU 127 #define INIT_TASK_RCU_TREE_PREEMPT() \ 128 .rcu_blocked_node = NULL, 129 #else 130 #define INIT_TASK_RCU_TREE_PREEMPT(tsk) 131 #endif 132 #ifdef CONFIG_PREEMPT_RCU 133 #define INIT_TASK_RCU_PREEMPT(tsk) \ 134 .rcu_read_lock_nesting = 0, \ 135 .rcu_read_unlock_special.s = 0, \ 136 .rcu_node_entry = LIST_HEAD_INIT(tsk.rcu_node_entry), \ 137 INIT_TASK_RCU_TREE_PREEMPT() 138 #else 139 #define INIT_TASK_RCU_PREEMPT(tsk) 140 #endif 141 #ifdef CONFIG_TASKS_RCU 142 #define INIT_TASK_RCU_TASKS(tsk) \ 143 .rcu_tasks_holdout = false, \ 144 .rcu_tasks_holdout_list = \ 145 LIST_HEAD_INIT(tsk.rcu_tasks_holdout_list), \ 146 .rcu_tasks_idle_cpu = -1, 147 #else 148 #define INIT_TASK_RCU_TASKS(tsk) 149 #endif 150 151 extern struct cred init_cred; 152 153 extern struct task_group root_task_group; 154 155 #ifdef CONFIG_CGROUP_SCHED 156 # define INIT_CGROUP_SCHED(tsk) \ 157 .sched_task_group = &root_task_group, 158 #else 159 # define INIT_CGROUP_SCHED(tsk) 160 #endif 161 162 #ifdef CONFIG_PERF_EVENTS 163 # define INIT_PERF_EVENTS(tsk) \ 164 .perf_event_mutex = \ 165 __MUTEX_INITIALIZER(tsk.perf_event_mutex), \ 166 .perf_event_list = LIST_HEAD_INIT(tsk.perf_event_list), 167 #else 168 # define INIT_PERF_EVENTS(tsk) 169 #endif 170 171 #ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN 172 # define INIT_VTIME(tsk) \ 173 .vtime_seqcount = SEQCNT_ZERO(tsk.vtime_seqcount), \ 174 .vtime_snap = 0, \ 175 .vtime_snap_whence = VTIME_SYS, 176 #else 177 # define INIT_VTIME(tsk) 178 #endif 179 180 #define INIT_TASK_COMM "swapper" 181 182 #ifdef CONFIG_RT_MUTEXES 183 # define INIT_RT_MUTEXES(tsk) \ 184 .pi_waiters = RB_ROOT, \ 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