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>
18 #include <asm/thread_info.h>
21 # define INIT_PUSHABLE_TASKS(tsk) \
22 .pushable_tasks = PLIST_NODE_INIT(tsk.pushable_tasks, MAX_PRIO),
24 # define INIT_PUSHABLE_TASKS(tsk)
27 extern struct files_struct init_files;
28 extern struct fs_struct init_fs;
31 #define INIT_CPUSET_SEQ(tsk) \
32 .mems_allowed_seq = SEQCNT_ZERO(tsk.mems_allowed_seq),
34 #define INIT_CPUSET_SEQ(tsk)
37 #ifndef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
38 #define INIT_PREV_CPUTIME(x) .prev_cputime = { \
39 .lock = __RAW_SPIN_LOCK_UNLOCKED(x.prev_cputime.lock), \
42 #define INIT_PREV_CPUTIME(x)
45 #ifdef CONFIG_POSIX_TIMERS
46 #define INIT_POSIX_TIMERS(s) \
47 .posix_timers = LIST_HEAD_INIT(s.posix_timers),
48 #define INIT_CPU_TIMERS(s) \
50 LIST_HEAD_INIT(s.cpu_timers[0]), \
51 LIST_HEAD_INIT(s.cpu_timers[1]), \
52 LIST_HEAD_INIT(s.cpu_timers[2]), \
54 #define INIT_CPUTIMER(s) \
56 .cputime_atomic = INIT_CPUTIME_ATOMIC, \
58 .checking_timer = false, \
61 #define INIT_POSIX_TIMERS(s)
62 #define INIT_CPU_TIMERS(s)
63 #define INIT_CPUTIMER(s)
66 #define INIT_SIGNALS(sig) { \
68 .thread_head = LIST_HEAD_INIT(init_task.thread_node), \
69 .wait_chldexit = __WAIT_QUEUE_HEAD_INITIALIZER(sig.wait_chldexit),\
71 .list = LIST_HEAD_INIT(sig.shared_pending.list), \
73 INIT_POSIX_TIMERS(sig) \
74 INIT_CPU_TIMERS(sig) \
75 .rlim = INIT_RLIMITS, \
77 INIT_PREV_CPUTIME(sig) \
79 __MUTEX_INITIALIZER(sig.cred_guard_mutex), \
82 extern struct nsproxy init_nsproxy;
84 #define INIT_SIGHAND(sighand) { \
85 .count = ATOMIC_INIT(1), \
86 .action = { { { .sa_handler = SIG_DFL, } }, }, \
87 .siglock = __SPIN_LOCK_UNLOCKED(sighand.siglock), \
88 .signalfd_wqh = __WAIT_QUEUE_HEAD_INITIALIZER(sighand.signalfd_wqh), \
91 extern struct group_info init_groups;
93 #define INIT_STRUCT_PID { \
94 .count = ATOMIC_INIT(1), \
103 .ns = &init_pid_ns, \
104 .pid_chain = { .next = NULL, .pprev = NULL }, \
108 #define INIT_PID_LINK(type) \
114 .pid = &init_struct_pid, \
117 #ifdef CONFIG_AUDITSYSCALL
119 .loginuid = INVALID_UID, \
120 .sessionid = (unsigned int)-1,
125 #ifdef CONFIG_PREEMPT_RCU
126 #define INIT_TASK_RCU_TREE_PREEMPT() \
127 .rcu_blocked_node = NULL,
129 #define INIT_TASK_RCU_TREE_PREEMPT(tsk)
131 #ifdef CONFIG_PREEMPT_RCU
132 #define INIT_TASK_RCU_PREEMPT(tsk) \
133 .rcu_read_lock_nesting = 0, \
134 .rcu_read_unlock_special.s = 0, \
135 .rcu_node_entry = LIST_HEAD_INIT(tsk.rcu_node_entry), \
136 INIT_TASK_RCU_TREE_PREEMPT()
138 #define INIT_TASK_RCU_PREEMPT(tsk)
140 #ifdef CONFIG_TASKS_RCU
141 #define INIT_TASK_RCU_TASKS(tsk) \
142 .rcu_tasks_holdout = false, \
143 .rcu_tasks_holdout_list = \
144 LIST_HEAD_INIT(tsk.rcu_tasks_holdout_list), \
145 .rcu_tasks_idle_cpu = -1,
147 #define INIT_TASK_RCU_TASKS(tsk)
150 extern struct cred init_cred;
152 extern struct task_group root_task_group;
154 #ifdef CONFIG_CGROUP_SCHED
155 # define INIT_CGROUP_SCHED(tsk) \
156 .sched_task_group = &root_task_group,
158 # define INIT_CGROUP_SCHED(tsk)
161 #ifdef CONFIG_PERF_EVENTS
162 # define INIT_PERF_EVENTS(tsk) \
163 .perf_event_mutex = \
164 __MUTEX_INITIALIZER(tsk.perf_event_mutex), \
165 .perf_event_list = LIST_HEAD_INIT(tsk.perf_event_list),
167 # define INIT_PERF_EVENTS(tsk)
170 #ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN
171 # define INIT_VTIME(tsk) \
172 .vtime_seqcount = SEQCNT_ZERO(tsk.vtime_seqcount), \
174 .vtime_snap_whence = VTIME_SYS,
176 # define INIT_VTIME(tsk)
179 #define INIT_TASK_COMM "swapper"
181 #ifdef CONFIG_RT_MUTEXES
182 # define INIT_RT_MUTEXES(tsk) \
183 .pi_waiters = RB_ROOT, \
184 .pi_waiters_leftmost = NULL,
186 # define INIT_RT_MUTEXES(tsk)
189 #ifdef CONFIG_NUMA_BALANCING
190 # define INIT_NUMA_BALANCING(tsk) \
191 .numa_preferred_nid = -1, \
192 .numa_group = NULL, \
195 # define INIT_NUMA_BALANCING(tsk)
199 # define INIT_KASAN(tsk) \
202 # define INIT_KASAN(tsk)
205 #ifdef CONFIG_THREAD_INFO_IN_TASK
206 # define INIT_TASK_TI(tsk) \
207 .thread_info = INIT_THREAD_INFO(tsk), \
208 .stack_refcount = ATOMIC_INIT(1),
210 # define INIT_TASK_TI(tsk)
214 * INIT_TASK is used to set up the first task table, touch at
215 * your own risk!. Base=0, limit=0x1fffff (=2MB)
217 #define INIT_TASK(tsk) \
221 .stack = init_stack, \
222 .usage = ATOMIC_INIT(2), \
223 .flags = PF_KTHREAD, \
224 .prio = MAX_PRIO-20, \
225 .static_prio = MAX_PRIO-20, \
226 .normal_prio = MAX_PRIO-20, \
227 .policy = SCHED_NORMAL, \
228 .cpus_allowed = CPU_MASK_ALL, \
229 .nr_cpus_allowed= NR_CPUS, \
231 .active_mm = &init_mm, \
233 .fn = do_no_restart_syscall, \
236 .group_node = LIST_HEAD_INIT(tsk.se.group_node), \
239 .run_list = LIST_HEAD_INIT(tsk.rt.run_list), \
240 .time_slice = RR_TIMESLICE, \
242 .tasks = LIST_HEAD_INIT(tsk.tasks), \
243 INIT_PUSHABLE_TASKS(tsk) \
244 INIT_CGROUP_SCHED(tsk) \
245 .ptraced = LIST_HEAD_INIT(tsk.ptraced), \
246 .ptrace_entry = LIST_HEAD_INIT(tsk.ptrace_entry), \
247 .real_parent = &tsk, \
249 .children = LIST_HEAD_INIT(tsk.children), \
250 .sibling = LIST_HEAD_INIT(tsk.sibling), \
251 .group_leader = &tsk, \
252 RCU_POINTER_INITIALIZER(real_cred, &init_cred), \
253 RCU_POINTER_INITIALIZER(cred, &init_cred), \
254 .comm = INIT_TASK_COMM, \
255 .thread = INIT_THREAD, \
257 .files = &init_files, \
258 .signal = &init_signals, \
259 .sighand = &init_sighand, \
260 .nsproxy = &init_nsproxy, \
262 .list = LIST_HEAD_INIT(tsk.pending.list), \
265 .alloc_lock = __SPIN_LOCK_UNLOCKED(tsk.alloc_lock), \
266 .journal_info = NULL, \
267 INIT_CPU_TIMERS(tsk) \
268 .pi_lock = __RAW_SPIN_LOCK_UNLOCKED(tsk.pi_lock), \
269 .timer_slack_ns = 50000, /* 50 usec default slack */ \
271 [PIDTYPE_PID] = INIT_PID_LINK(PIDTYPE_PID), \
272 [PIDTYPE_PGID] = INIT_PID_LINK(PIDTYPE_PGID), \
273 [PIDTYPE_SID] = INIT_PID_LINK(PIDTYPE_SID), \
275 .thread_group = LIST_HEAD_INIT(tsk.thread_group), \
276 .thread_node = LIST_HEAD_INIT(init_signals.thread_head), \
278 INIT_PERF_EVENTS(tsk) \
279 INIT_TRACE_IRQFLAGS \
282 INIT_TRACE_RECURSION \
283 INIT_TASK_RCU_PREEMPT(tsk) \
284 INIT_TASK_RCU_TASKS(tsk) \
285 INIT_CPUSET_SEQ(tsk) \
286 INIT_RT_MUTEXES(tsk) \
287 INIT_PREV_CPUTIME(tsk) \
289 INIT_NUMA_BALANCING(tsk) \
294 /* Attach to the init_task data structure for proper alignment */
295 #define __init_task_data __attribute__((__section__(".data..init_task")))