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