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 <net/net_namespace.h> 15 #include <linux/sched/rt.h> 16 17 #ifdef CONFIG_SMP 18 # define INIT_PUSHABLE_TASKS(tsk) \ 19 .pushable_tasks = PLIST_NODE_INIT(tsk.pushable_tasks, MAX_PRIO), 20 #else 21 # define INIT_PUSHABLE_TASKS(tsk) 22 #endif 23 24 extern struct files_struct init_files; 25 extern struct fs_struct init_fs; 26 27 #ifdef CONFIG_CGROUPS 28 #define INIT_GROUP_RWSEM(sig) \ 29 .group_rwsem = __RWSEM_INITIALIZER(sig.group_rwsem), 30 #else 31 #define INIT_GROUP_RWSEM(sig) 32 #endif 33 34 #ifdef CONFIG_CPUSETS 35 #define INIT_CPUSET_SEQ \ 36 .mems_allowed_seq = SEQCNT_ZERO, 37 #else 38 #define INIT_CPUSET_SEQ 39 #endif 40 41 #define INIT_SIGNALS(sig) { \ 42 .nr_threads = 1, \ 43 .thread_head = LIST_HEAD_INIT(init_task.thread_node), \ 44 .wait_chldexit = __WAIT_QUEUE_HEAD_INITIALIZER(sig.wait_chldexit),\ 45 .shared_pending = { \ 46 .list = LIST_HEAD_INIT(sig.shared_pending.list), \ 47 .signal = {{0}}}, \ 48 .posix_timers = LIST_HEAD_INIT(sig.posix_timers), \ 49 .cpu_timers = INIT_CPU_TIMERS(sig.cpu_timers), \ 50 .rlim = INIT_RLIMITS, \ 51 .cputimer = { \ 52 .cputime = INIT_CPUTIME, \ 53 .running = 0, \ 54 .lock = __RAW_SPIN_LOCK_UNLOCKED(sig.cputimer.lock), \ 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 = -1, 100 #else 101 #define INIT_IDS 102 #endif 103 104 #ifdef CONFIG_RCU_BOOST 105 #define INIT_TASK_RCU_BOOST() \ 106 .rcu_boost_mutex = NULL, 107 #else 108 #define INIT_TASK_RCU_BOOST() 109 #endif 110 #ifdef CONFIG_TREE_PREEMPT_RCU 111 #define INIT_TASK_RCU_TREE_PREEMPT() \ 112 .rcu_blocked_node = NULL, 113 #else 114 #define INIT_TASK_RCU_TREE_PREEMPT(tsk) 115 #endif 116 #ifdef CONFIG_PREEMPT_RCU 117 #define INIT_TASK_RCU_PREEMPT(tsk) \ 118 .rcu_read_lock_nesting = 0, \ 119 .rcu_read_unlock_special = 0, \ 120 .rcu_node_entry = LIST_HEAD_INIT(tsk.rcu_node_entry), \ 121 INIT_TASK_RCU_TREE_PREEMPT() \ 122 INIT_TASK_RCU_BOOST() 123 #else 124 #define INIT_TASK_RCU_PREEMPT(tsk) 125 #endif 126 127 extern struct cred init_cred; 128 129 extern struct task_group root_task_group; 130 131 #ifdef CONFIG_CGROUP_SCHED 132 # define INIT_CGROUP_SCHED(tsk) \ 133 .sched_task_group = &root_task_group, 134 #else 135 # define INIT_CGROUP_SCHED(tsk) 136 #endif 137 138 #ifdef CONFIG_PERF_EVENTS 139 # define INIT_PERF_EVENTS(tsk) \ 140 .perf_event_mutex = \ 141 __MUTEX_INITIALIZER(tsk.perf_event_mutex), \ 142 .perf_event_list = LIST_HEAD_INIT(tsk.perf_event_list), 143 #else 144 # define INIT_PERF_EVENTS(tsk) 145 #endif 146 147 #ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN 148 # define INIT_VTIME(tsk) \ 149 .vtime_seqlock = __SEQLOCK_UNLOCKED(tsk.vtime_seqlock), \ 150 .vtime_snap = 0, \ 151 .vtime_snap_whence = VTIME_SYS, 152 #else 153 # define INIT_VTIME(tsk) 154 #endif 155 156 #define INIT_TASK_COMM "swapper" 157 158 /* 159 * INIT_TASK is used to set up the first task table, touch at 160 * your own risk!. Base=0, limit=0x1fffff (=2MB) 161 */ 162 #define INIT_TASK(tsk) \ 163 { \ 164 .state = 0, \ 165 .stack = &init_thread_info, \ 166 .usage = ATOMIC_INIT(2), \ 167 .flags = PF_KTHREAD, \ 168 .prio = MAX_PRIO-20, \ 169 .static_prio = MAX_PRIO-20, \ 170 .normal_prio = MAX_PRIO-20, \ 171 .policy = SCHED_NORMAL, \ 172 .cpus_allowed = CPU_MASK_ALL, \ 173 .nr_cpus_allowed= NR_CPUS, \ 174 .mm = NULL, \ 175 .active_mm = &init_mm, \ 176 .se = { \ 177 .group_node = LIST_HEAD_INIT(tsk.se.group_node), \ 178 }, \ 179 .rt = { \ 180 .run_list = LIST_HEAD_INIT(tsk.rt.run_list), \ 181 .time_slice = RR_TIMESLICE, \ 182 }, \ 183 .tasks = LIST_HEAD_INIT(tsk.tasks), \ 184 INIT_PUSHABLE_TASKS(tsk) \ 185 INIT_CGROUP_SCHED(tsk) \ 186 .ptraced = LIST_HEAD_INIT(tsk.ptraced), \ 187 .ptrace_entry = LIST_HEAD_INIT(tsk.ptrace_entry), \ 188 .real_parent = &tsk, \ 189 .parent = &tsk, \ 190 .children = LIST_HEAD_INIT(tsk.children), \ 191 .sibling = LIST_HEAD_INIT(tsk.sibling), \ 192 .group_leader = &tsk, \ 193 RCU_POINTER_INITIALIZER(real_cred, &init_cred), \ 194 RCU_POINTER_INITIALIZER(cred, &init_cred), \ 195 .comm = INIT_TASK_COMM, \ 196 .thread = INIT_THREAD, \ 197 .fs = &init_fs, \ 198 .files = &init_files, \ 199 .signal = &init_signals, \ 200 .sighand = &init_sighand, \ 201 .nsproxy = &init_nsproxy, \ 202 .pending = { \ 203 .list = LIST_HEAD_INIT(tsk.pending.list), \ 204 .signal = {{0}}}, \ 205 .blocked = {{0}}, \ 206 .alloc_lock = __SPIN_LOCK_UNLOCKED(tsk.alloc_lock), \ 207 .journal_info = NULL, \ 208 .cpu_timers = INIT_CPU_TIMERS(tsk.cpu_timers), \ 209 .pi_lock = __RAW_SPIN_LOCK_UNLOCKED(tsk.pi_lock), \ 210 .timer_slack_ns = 50000, /* 50 usec default slack */ \ 211 .pids = { \ 212 [PIDTYPE_PID] = INIT_PID_LINK(PIDTYPE_PID), \ 213 [PIDTYPE_PGID] = INIT_PID_LINK(PIDTYPE_PGID), \ 214 [PIDTYPE_SID] = INIT_PID_LINK(PIDTYPE_SID), \ 215 }, \ 216 .thread_group = LIST_HEAD_INIT(tsk.thread_group), \ 217 .thread_node = LIST_HEAD_INIT(init_signals.thread_head), \ 218 INIT_IDS \ 219 INIT_PERF_EVENTS(tsk) \ 220 INIT_TRACE_IRQFLAGS \ 221 INIT_LOCKDEP \ 222 INIT_FTRACE_GRAPH \ 223 INIT_TRACE_RECURSION \ 224 INIT_TASK_RCU_PREEMPT(tsk) \ 225 INIT_CPUSET_SEQ \ 226 INIT_VTIME(tsk) \ 227 } 228 229 230 #define INIT_CPU_TIMERS(cpu_timers) \ 231 { \ 232 LIST_HEAD_INIT(cpu_timers[0]), \ 233 LIST_HEAD_INIT(cpu_timers[1]), \ 234 LIST_HEAD_INIT(cpu_timers[2]), \ 235 } 236 237 /* Attach to the init_task data structure for proper alignment */ 238 #define __init_task_data __attribute__((__section__(".data..init_task"))) 239 240 241 #endif 242