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