1 #ifndef _LINUX__INIT_TASK_H
2 #define _LINUX__INIT_TASK_H
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>
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>
19 # define INIT_PUSHABLE_TASKS(tsk) \
20 .pushable_tasks = PLIST_NODE_INIT(tsk.pushable_tasks, MAX_PRIO),
22 # define INIT_PUSHABLE_TASKS(tsk)
25 extern struct files_struct init_files;
26 extern struct fs_struct init_fs;
29 #define INIT_GROUP_RWSEM(sig) \
30 .group_rwsem = __RWSEM_INITIALIZER(sig.group_rwsem),
32 #define INIT_GROUP_RWSEM(sig)
36 #define INIT_CPUSET_SEQ(tsk) \
37 .mems_allowed_seq = SEQCNT_ZERO(tsk.mems_allowed_seq),
39 #define INIT_CPUSET_SEQ(tsk)
42 #define INIT_SIGNALS(sig) { \
44 .thread_head = LIST_HEAD_INIT(init_task.thread_node), \
45 .wait_chldexit = __WAIT_QUEUE_HEAD_INITIALIZER(sig.wait_chldexit),\
47 .list = LIST_HEAD_INIT(sig.shared_pending.list), \
49 .posix_timers = LIST_HEAD_INIT(sig.posix_timers), \
50 .cpu_timers = INIT_CPU_TIMERS(sig.cpu_timers), \
51 .rlim = INIT_RLIMITS, \
53 .cputime = INIT_CPUTIME, \
55 .lock = __RAW_SPIN_LOCK_UNLOCKED(sig.cputimer.lock), \
58 __MUTEX_INITIALIZER(sig.cred_guard_mutex), \
59 INIT_GROUP_RWSEM(sig) \
62 extern struct nsproxy init_nsproxy;
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), \
71 extern struct group_info init_groups;
73 #define INIT_STRUCT_PID { \
74 .count = ATOMIC_INIT(1), \
84 .pid_chain = { .next = NULL, .pprev = NULL }, \
88 #define INIT_PID_LINK(type) \
94 .pid = &init_struct_pid, \
97 #ifdef CONFIG_AUDITSYSCALL
99 .loginuid = INVALID_UID, \
100 .sessionid = (unsigned int)-1,
105 #ifdef CONFIG_PREEMPT_RCU
106 #define INIT_TASK_RCU_TREE_PREEMPT() \
107 .rcu_blocked_node = NULL,
109 #define INIT_TASK_RCU_TREE_PREEMPT(tsk)
111 #ifdef CONFIG_PREEMPT_RCU
112 #define INIT_TASK_RCU_PREEMPT(tsk) \
113 .rcu_read_lock_nesting = 0, \
114 .rcu_read_unlock_special.s = 0, \
115 .rcu_node_entry = LIST_HEAD_INIT(tsk.rcu_node_entry), \
116 INIT_TASK_RCU_TREE_PREEMPT()
118 #define INIT_TASK_RCU_PREEMPT(tsk)
120 #ifdef CONFIG_TASKS_RCU
121 #define INIT_TASK_RCU_TASKS(tsk) \
122 .rcu_tasks_holdout = false, \
123 .rcu_tasks_holdout_list = \
124 LIST_HEAD_INIT(tsk.rcu_tasks_holdout_list), \
125 .rcu_tasks_idle_cpu = -1,
127 #define INIT_TASK_RCU_TASKS(tsk)
130 extern struct cred init_cred;
132 extern struct task_group root_task_group;
134 #ifdef CONFIG_CGROUP_SCHED
135 # define INIT_CGROUP_SCHED(tsk) \
136 .sched_task_group = &root_task_group,
138 # define INIT_CGROUP_SCHED(tsk)
141 #ifdef CONFIG_PERF_EVENTS
142 # define INIT_PERF_EVENTS(tsk) \
143 .perf_event_mutex = \
144 __MUTEX_INITIALIZER(tsk.perf_event_mutex), \
145 .perf_event_list = LIST_HEAD_INIT(tsk.perf_event_list),
147 # define INIT_PERF_EVENTS(tsk)
150 #ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN
151 # define INIT_VTIME(tsk) \
152 .vtime_seqlock = __SEQLOCK_UNLOCKED(tsk.vtime_seqlock), \
154 .vtime_snap_whence = VTIME_SYS,
156 # define INIT_VTIME(tsk)
159 #define INIT_TASK_COMM "swapper"
161 #ifdef CONFIG_RT_MUTEXES
162 # define INIT_RT_MUTEXES(tsk) \
163 .pi_waiters = RB_ROOT, \
164 .pi_waiters_leftmost = NULL,
166 # define INIT_RT_MUTEXES(tsk)
169 #ifdef CONFIG_NUMA_BALANCING
170 # define INIT_NUMA_BALANCING(tsk) \
171 .numa_preferred_nid = -1, \
172 .numa_group = NULL, \
175 # define INIT_NUMA_BALANCING(tsk)
179 * INIT_TASK is used to set up the first task table, touch at
180 * your own risk!. Base=0, limit=0x1fffff (=2MB)
182 #define INIT_TASK(tsk) \
185 .stack = &init_thread_info, \
186 .usage = ATOMIC_INIT(2), \
187 .flags = PF_KTHREAD, \
188 .prio = MAX_PRIO-20, \
189 .static_prio = MAX_PRIO-20, \
190 .normal_prio = MAX_PRIO-20, \
191 .policy = SCHED_NORMAL, \
192 .cpus_allowed = CPU_MASK_ALL, \
193 .nr_cpus_allowed= NR_CPUS, \
195 .active_mm = &init_mm, \
197 .fn = do_no_restart_syscall, \
200 .group_node = LIST_HEAD_INIT(tsk.se.group_node), \
203 .run_list = LIST_HEAD_INIT(tsk.rt.run_list), \
204 .time_slice = RR_TIMESLICE, \
206 .tasks = LIST_HEAD_INIT(tsk.tasks), \
207 INIT_PUSHABLE_TASKS(tsk) \
208 INIT_CGROUP_SCHED(tsk) \
209 .ptraced = LIST_HEAD_INIT(tsk.ptraced), \
210 .ptrace_entry = LIST_HEAD_INIT(tsk.ptrace_entry), \
211 .real_parent = &tsk, \
213 .children = LIST_HEAD_INIT(tsk.children), \
214 .sibling = LIST_HEAD_INIT(tsk.sibling), \
215 .group_leader = &tsk, \
216 RCU_POINTER_INITIALIZER(real_cred, &init_cred), \
217 RCU_POINTER_INITIALIZER(cred, &init_cred), \
218 .comm = INIT_TASK_COMM, \
219 .thread = INIT_THREAD, \
221 .files = &init_files, \
222 .signal = &init_signals, \
223 .sighand = &init_sighand, \
224 .nsproxy = &init_nsproxy, \
226 .list = LIST_HEAD_INIT(tsk.pending.list), \
229 .alloc_lock = __SPIN_LOCK_UNLOCKED(tsk.alloc_lock), \
230 .journal_info = NULL, \
231 .cpu_timers = INIT_CPU_TIMERS(tsk.cpu_timers), \
232 .pi_lock = __RAW_SPIN_LOCK_UNLOCKED(tsk.pi_lock), \
233 .timer_slack_ns = 50000, /* 50 usec default slack */ \
235 [PIDTYPE_PID] = INIT_PID_LINK(PIDTYPE_PID), \
236 [PIDTYPE_PGID] = INIT_PID_LINK(PIDTYPE_PGID), \
237 [PIDTYPE_SID] = INIT_PID_LINK(PIDTYPE_SID), \
239 .thread_group = LIST_HEAD_INIT(tsk.thread_group), \
240 .thread_node = LIST_HEAD_INIT(init_signals.thread_head), \
242 INIT_PERF_EVENTS(tsk) \
243 INIT_TRACE_IRQFLAGS \
246 INIT_TRACE_RECURSION \
247 INIT_TASK_RCU_PREEMPT(tsk) \
248 INIT_TASK_RCU_TASKS(tsk) \
249 INIT_CPUSET_SEQ(tsk) \
250 INIT_RT_MUTEXES(tsk) \
252 INIT_NUMA_BALANCING(tsk) \
256 #define INIT_CPU_TIMERS(cpu_timers) \
258 LIST_HEAD_INIT(cpu_timers[0]), \
259 LIST_HEAD_INIT(cpu_timers[1]), \
260 LIST_HEAD_INIT(cpu_timers[2]), \
263 /* Attach to the init_task data structure for proper alignment */
264 #define __init_task_data __attribute__((__section__(".data..init_task")))