1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _LINUX__INIT_TASK_H
3 #define _LINUX__INIT_TASK_H
5 #include <linux/rcupdate.h>
6 #include <linux/irqflags.h>
7 #include <linux/utsname.h>
8 #include <linux/lockdep.h>
9 #include <linux/ftrace.h>
10 #include <linux/ipc.h>
11 #include <linux/pid_namespace.h>
12 #include <linux/user_namespace.h>
13 #include <linux/securebits.h>
14 #include <linux/seqlock.h>
15 #include <linux/rbtree.h>
16 #include <linux/sched/autogroup.h>
17 #include <net/net_namespace.h>
18 #include <linux/sched/rt.h>
19 #include <linux/livepatch.h>
20 #include <linux/mm_types.h>
22 #include <asm/thread_info.h>
25 # define INIT_PUSHABLE_TASKS(tsk) \
26 .pushable_tasks = PLIST_NODE_INIT(tsk.pushable_tasks, MAX_PRIO),
28 # define INIT_PUSHABLE_TASKS(tsk)
31 extern struct files_struct init_files;
32 extern struct fs_struct init_fs;
35 #define INIT_CPUSET_SEQ(tsk) \
36 .mems_allowed_seq = SEQCNT_ZERO(tsk.mems_allowed_seq),
38 #define INIT_CPUSET_SEQ(tsk)
41 #ifndef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
42 #define INIT_PREV_CPUTIME(x) .prev_cputime = { \
43 .lock = __RAW_SPIN_LOCK_UNLOCKED(x.prev_cputime.lock), \
46 #define INIT_PREV_CPUTIME(x)
49 #ifdef CONFIG_POSIX_TIMERS
50 #define INIT_POSIX_TIMERS(s) \
51 .posix_timers = LIST_HEAD_INIT(s.posix_timers),
52 #define INIT_CPU_TIMERS(s) \
54 LIST_HEAD_INIT(s.cpu_timers[0]), \
55 LIST_HEAD_INIT(s.cpu_timers[1]), \
56 LIST_HEAD_INIT(s.cpu_timers[2]), \
58 #define INIT_CPUTIMER(s) \
60 .cputime_atomic = INIT_CPUTIME_ATOMIC, \
62 .checking_timer = false, \
65 #define INIT_POSIX_TIMERS(s)
66 #define INIT_CPU_TIMERS(s)
67 #define INIT_CPUTIMER(s)
70 #define INIT_SIGNALS(sig) { \
72 .thread_head = LIST_HEAD_INIT(init_task.thread_node), \
73 .wait_chldexit = __WAIT_QUEUE_HEAD_INITIALIZER(sig.wait_chldexit),\
75 .list = LIST_HEAD_INIT(sig.shared_pending.list), \
77 INIT_POSIX_TIMERS(sig) \
78 INIT_CPU_TIMERS(sig) \
79 .rlim = INIT_RLIMITS, \
81 INIT_PREV_CPUTIME(sig) \
83 __MUTEX_INITIALIZER(sig.cred_guard_mutex), \
86 extern struct nsproxy init_nsproxy;
88 #define INIT_SIGHAND(sighand) { \
89 .count = ATOMIC_INIT(1), \
90 .action = { { { .sa_handler = SIG_DFL, } }, }, \
91 .siglock = __SPIN_LOCK_UNLOCKED(sighand.siglock), \
92 .signalfd_wqh = __WAIT_QUEUE_HEAD_INITIALIZER(sighand.signalfd_wqh), \
95 extern struct group_info init_groups;
97 #define INIT_STRUCT_PID { \
98 .count = ATOMIC_INIT(1), \
107 .ns = &init_pid_ns, \
108 .pid_chain = { .next = NULL, .pprev = NULL }, \
112 #define INIT_PID_LINK(type) \
118 .pid = &init_struct_pid, \
121 #ifdef CONFIG_AUDITSYSCALL
123 .loginuid = INVALID_UID, \
124 .sessionid = (unsigned int)-1,
129 #ifdef CONFIG_PREEMPT_RCU
130 #define INIT_TASK_RCU_PREEMPT(tsk) \
131 .rcu_read_lock_nesting = 0, \
132 .rcu_read_unlock_special.s = 0, \
133 .rcu_node_entry = LIST_HEAD_INIT(tsk.rcu_node_entry), \
134 .rcu_blocked_node = NULL,
136 #define INIT_TASK_RCU_PREEMPT(tsk)
138 #ifdef CONFIG_TASKS_RCU
139 #define INIT_TASK_RCU_TASKS(tsk) \
140 .rcu_tasks_holdout = false, \
141 .rcu_tasks_holdout_list = \
142 LIST_HEAD_INIT(tsk.rcu_tasks_holdout_list), \
143 .rcu_tasks_idle_cpu = -1,
145 #define INIT_TASK_RCU_TASKS(tsk)
148 extern struct cred init_cred;
150 #ifdef CONFIG_CGROUP_SCHED
151 # define INIT_CGROUP_SCHED(tsk) \
152 .sched_task_group = &root_task_group,
154 # define INIT_CGROUP_SCHED(tsk)
157 #ifdef CONFIG_PERF_EVENTS
158 # define INIT_PERF_EVENTS(tsk) \
159 .perf_event_mutex = \
160 __MUTEX_INITIALIZER(tsk.perf_event_mutex), \
161 .perf_event_list = LIST_HEAD_INIT(tsk.perf_event_list),
163 # define INIT_PERF_EVENTS(tsk)
166 #ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN
167 # define INIT_VTIME(tsk) \
168 .vtime.seqcount = SEQCNT_ZERO(tsk.vtime.seqcount), \
169 .vtime.starttime = 0, \
170 .vtime.state = VTIME_SYS,
172 # define INIT_VTIME(tsk)
175 #define INIT_TASK_COMM "swapper"
177 #ifdef CONFIG_RT_MUTEXES
178 # define INIT_RT_MUTEXES(tsk) \
179 .pi_waiters = RB_ROOT_CACHED, \
182 # define INIT_RT_MUTEXES(tsk)
185 #ifdef CONFIG_NUMA_BALANCING
186 # define INIT_NUMA_BALANCING(tsk) \
187 .numa_preferred_nid = -1, \
188 .numa_group = NULL, \
191 # define INIT_NUMA_BALANCING(tsk)
195 # define INIT_KASAN(tsk) \
198 # define INIT_KASAN(tsk)
201 #ifdef CONFIG_LIVEPATCH
202 # define INIT_LIVEPATCH(tsk) \
203 .patch_state = KLP_UNDEFINED,
205 # define INIT_LIVEPATCH(tsk)
208 #ifdef CONFIG_THREAD_INFO_IN_TASK
209 # define INIT_TASK_TI(tsk) \
210 .thread_info = INIT_THREAD_INFO(tsk), \
211 .stack_refcount = ATOMIC_INIT(1),
213 # define INIT_TASK_TI(tsk)
216 #ifdef CONFIG_SECURITY
217 #define INIT_TASK_SECURITY .security = NULL,
219 #define INIT_TASK_SECURITY
223 * INIT_TASK is used to set up the first task table, touch at
224 * your own risk!. Base=0, limit=0x1fffff (=2MB)
226 #define INIT_TASK(tsk) \
230 .stack = init_stack, \
231 .usage = ATOMIC_INIT(2), \
232 .flags = PF_KTHREAD, \
233 .prio = MAX_PRIO-20, \
234 .static_prio = MAX_PRIO-20, \
235 .normal_prio = MAX_PRIO-20, \
236 .policy = SCHED_NORMAL, \
237 .cpus_allowed = CPU_MASK_ALL, \
238 .nr_cpus_allowed= NR_CPUS, \
240 .active_mm = &init_mm, \
242 .fn = do_no_restart_syscall, \
245 .group_node = LIST_HEAD_INIT(tsk.se.group_node), \
248 .run_list = LIST_HEAD_INIT(tsk.rt.run_list), \
249 .time_slice = RR_TIMESLICE, \
251 .tasks = LIST_HEAD_INIT(tsk.tasks), \
252 INIT_PUSHABLE_TASKS(tsk) \
253 INIT_CGROUP_SCHED(tsk) \
254 .ptraced = LIST_HEAD_INIT(tsk.ptraced), \
255 .ptrace_entry = LIST_HEAD_INIT(tsk.ptrace_entry), \
256 .real_parent = &tsk, \
258 .children = LIST_HEAD_INIT(tsk.children), \
259 .sibling = LIST_HEAD_INIT(tsk.sibling), \
260 .group_leader = &tsk, \
261 RCU_POINTER_INITIALIZER(real_cred, &init_cred), \
262 RCU_POINTER_INITIALIZER(cred, &init_cred), \
263 .comm = INIT_TASK_COMM, \
264 .thread = INIT_THREAD, \
266 .files = &init_files, \
267 .signal = &init_signals, \
268 .sighand = &init_sighand, \
269 .nsproxy = &init_nsproxy, \
271 .list = LIST_HEAD_INIT(tsk.pending.list), \
274 .alloc_lock = __SPIN_LOCK_UNLOCKED(tsk.alloc_lock), \
275 .journal_info = NULL, \
276 INIT_CPU_TIMERS(tsk) \
277 .pi_lock = __RAW_SPIN_LOCK_UNLOCKED(tsk.pi_lock), \
278 .timer_slack_ns = 50000, /* 50 usec default slack */ \
280 [PIDTYPE_PID] = INIT_PID_LINK(PIDTYPE_PID), \
281 [PIDTYPE_PGID] = INIT_PID_LINK(PIDTYPE_PGID), \
282 [PIDTYPE_SID] = INIT_PID_LINK(PIDTYPE_SID), \
284 .thread_group = LIST_HEAD_INIT(tsk.thread_group), \
285 .thread_node = LIST_HEAD_INIT(init_signals.thread_head), \
287 INIT_PERF_EVENTS(tsk) \
288 INIT_TRACE_IRQFLAGS \
291 INIT_TRACE_RECURSION \
292 INIT_TASK_RCU_PREEMPT(tsk) \
293 INIT_TASK_RCU_TASKS(tsk) \
294 INIT_CPUSET_SEQ(tsk) \
295 INIT_RT_MUTEXES(tsk) \
296 INIT_PREV_CPUTIME(tsk) \
298 INIT_NUMA_BALANCING(tsk) \
300 INIT_LIVEPATCH(tsk) \
305 /* Attach to the init_task data structure for proper alignment */
306 #define __init_task_data __attribute__((__section__(".data..init_task")))