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