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 #ifndef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
43 #define INIT_PREV_CPUTIME(x) .prev_cputime = { \
44 .lock = __RAW_SPIN_LOCK_UNLOCKED(x.prev_cputime.lock), \
47 #define INIT_PREV_CPUTIME(x)
50 #define INIT_SIGNALS(sig) { \
52 .thread_head = LIST_HEAD_INIT(init_task.thread_node), \
53 .wait_chldexit = __WAIT_QUEUE_HEAD_INITIALIZER(sig.wait_chldexit),\
55 .list = LIST_HEAD_INIT(sig.shared_pending.list), \
57 .posix_timers = LIST_HEAD_INIT(sig.posix_timers), \
58 .cpu_timers = INIT_CPU_TIMERS(sig.cpu_timers), \
59 .rlim = INIT_RLIMITS, \
61 .cputime_atomic = INIT_CPUTIME_ATOMIC, \
63 .checking_timer = false, \
65 INIT_PREV_CPUTIME(sig) \
67 __MUTEX_INITIALIZER(sig.cred_guard_mutex), \
68 INIT_GROUP_RWSEM(sig) \
71 extern struct nsproxy init_nsproxy;
73 #define INIT_SIGHAND(sighand) { \
74 .count = ATOMIC_INIT(1), \
75 .action = { { { .sa_handler = SIG_DFL, } }, }, \
76 .siglock = __SPIN_LOCK_UNLOCKED(sighand.siglock), \
77 .signalfd_wqh = __WAIT_QUEUE_HEAD_INITIALIZER(sighand.signalfd_wqh), \
80 extern struct group_info init_groups;
82 #define INIT_STRUCT_PID { \
83 .count = ATOMIC_INIT(1), \
93 .pid_chain = { .next = NULL, .pprev = NULL }, \
97 #define INIT_PID_LINK(type) \
103 .pid = &init_struct_pid, \
106 #ifdef CONFIG_AUDITSYSCALL
108 .loginuid = INVALID_UID, \
109 .sessionid = (unsigned int)-1,
114 #ifdef CONFIG_PREEMPT_RCU
115 #define INIT_TASK_RCU_TREE_PREEMPT() \
116 .rcu_blocked_node = NULL,
118 #define INIT_TASK_RCU_TREE_PREEMPT(tsk)
120 #ifdef CONFIG_PREEMPT_RCU
121 #define INIT_TASK_RCU_PREEMPT(tsk) \
122 .rcu_read_lock_nesting = 0, \
123 .rcu_read_unlock_special.s = 0, \
124 .rcu_node_entry = LIST_HEAD_INIT(tsk.rcu_node_entry), \
125 INIT_TASK_RCU_TREE_PREEMPT()
127 #define INIT_TASK_RCU_PREEMPT(tsk)
129 #ifdef CONFIG_TASKS_RCU
130 #define INIT_TASK_RCU_TASKS(tsk) \
131 .rcu_tasks_holdout = false, \
132 .rcu_tasks_holdout_list = \
133 LIST_HEAD_INIT(tsk.rcu_tasks_holdout_list), \
134 .rcu_tasks_idle_cpu = -1,
136 #define INIT_TASK_RCU_TASKS(tsk)
139 extern struct cred init_cred;
141 extern struct task_group root_task_group;
143 #ifdef CONFIG_CGROUP_SCHED
144 # define INIT_CGROUP_SCHED(tsk) \
145 .sched_task_group = &root_task_group,
147 # define INIT_CGROUP_SCHED(tsk)
150 #ifdef CONFIG_PERF_EVENTS
151 # define INIT_PERF_EVENTS(tsk) \
152 .perf_event_mutex = \
153 __MUTEX_INITIALIZER(tsk.perf_event_mutex), \
154 .perf_event_list = LIST_HEAD_INIT(tsk.perf_event_list),
156 # define INIT_PERF_EVENTS(tsk)
159 #ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN
160 # define INIT_VTIME(tsk) \
161 .vtime_seqlock = __SEQLOCK_UNLOCKED(tsk.vtime_seqlock), \
163 .vtime_snap_whence = VTIME_SYS,
165 # define INIT_VTIME(tsk)
168 #define INIT_TASK_COMM "swapper"
170 #ifdef CONFIG_RT_MUTEXES
171 # define INIT_RT_MUTEXES(tsk) \
172 .pi_waiters = RB_ROOT, \
173 .pi_waiters_leftmost = NULL,
175 # define INIT_RT_MUTEXES(tsk)
178 #ifdef CONFIG_NUMA_BALANCING
179 # define INIT_NUMA_BALANCING(tsk) \
180 .numa_preferred_nid = -1, \
181 .numa_group = NULL, \
184 # define INIT_NUMA_BALANCING(tsk)
188 # define INIT_KASAN(tsk) \
191 # define INIT_KASAN(tsk)
195 * INIT_TASK is used to set up the first task table, touch at
196 * your own risk!. Base=0, limit=0x1fffff (=2MB)
198 #define INIT_TASK(tsk) \
201 .stack = &init_thread_info, \
202 .usage = ATOMIC_INIT(2), \
203 .flags = PF_KTHREAD, \
204 .prio = MAX_PRIO-20, \
205 .static_prio = MAX_PRIO-20, \
206 .normal_prio = MAX_PRIO-20, \
207 .policy = SCHED_NORMAL, \
208 .cpus_allowed = CPU_MASK_ALL, \
209 .nr_cpus_allowed= NR_CPUS, \
211 .active_mm = &init_mm, \
213 .fn = do_no_restart_syscall, \
216 .group_node = LIST_HEAD_INIT(tsk.se.group_node), \
219 .run_list = LIST_HEAD_INIT(tsk.rt.run_list), \
220 .time_slice = RR_TIMESLICE, \
222 .tasks = LIST_HEAD_INIT(tsk.tasks), \
223 INIT_PUSHABLE_TASKS(tsk) \
224 INIT_CGROUP_SCHED(tsk) \
225 .ptraced = LIST_HEAD_INIT(tsk.ptraced), \
226 .ptrace_entry = LIST_HEAD_INIT(tsk.ptrace_entry), \
227 .real_parent = &tsk, \
229 .children = LIST_HEAD_INIT(tsk.children), \
230 .sibling = LIST_HEAD_INIT(tsk.sibling), \
231 .group_leader = &tsk, \
232 RCU_POINTER_INITIALIZER(real_cred, &init_cred), \
233 RCU_POINTER_INITIALIZER(cred, &init_cred), \
234 .comm = INIT_TASK_COMM, \
235 .thread = INIT_THREAD, \
237 .files = &init_files, \
238 .signal = &init_signals, \
239 .sighand = &init_sighand, \
240 .nsproxy = &init_nsproxy, \
242 .list = LIST_HEAD_INIT(tsk.pending.list), \
245 .alloc_lock = __SPIN_LOCK_UNLOCKED(tsk.alloc_lock), \
246 .journal_info = NULL, \
247 .cpu_timers = INIT_CPU_TIMERS(tsk.cpu_timers), \
248 .pi_lock = __RAW_SPIN_LOCK_UNLOCKED(tsk.pi_lock), \
249 .timer_slack_ns = 50000, /* 50 usec default slack */ \
251 [PIDTYPE_PID] = INIT_PID_LINK(PIDTYPE_PID), \
252 [PIDTYPE_PGID] = INIT_PID_LINK(PIDTYPE_PGID), \
253 [PIDTYPE_SID] = INIT_PID_LINK(PIDTYPE_SID), \
255 .thread_group = LIST_HEAD_INIT(tsk.thread_group), \
256 .thread_node = LIST_HEAD_INIT(init_signals.thread_head), \
258 INIT_PERF_EVENTS(tsk) \
259 INIT_TRACE_IRQFLAGS \
262 INIT_TRACE_RECURSION \
263 INIT_TASK_RCU_PREEMPT(tsk) \
264 INIT_TASK_RCU_TASKS(tsk) \
265 INIT_CPUSET_SEQ(tsk) \
266 INIT_RT_MUTEXES(tsk) \
267 INIT_PREV_CPUTIME(tsk) \
269 INIT_NUMA_BALANCING(tsk) \
274 #define INIT_CPU_TIMERS(cpu_timers) \
276 LIST_HEAD_INIT(cpu_timers[0]), \
277 LIST_HEAD_INIT(cpu_timers[1]), \
278 LIST_HEAD_INIT(cpu_timers[2]), \
281 /* Attach to the init_task data structure for proper alignment */
282 #define __init_task_data __attribute__((__section__(".data..init_task")))