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