Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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kernel
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linux
1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _LINUX__INIT_TASK_H
3#define _LINUX__INIT_TASK_H
4
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>
21
22#include <asm/thread_info.h>
23
24#ifdef CONFIG_SMP
25# define INIT_PUSHABLE_TASKS(tsk) \
26 .pushable_tasks = PLIST_NODE_INIT(tsk.pushable_tasks, MAX_PRIO),
27#else
28# define INIT_PUSHABLE_TASKS(tsk)
29#endif
30
31extern struct files_struct init_files;
32extern struct fs_struct init_fs;
33
34#ifdef CONFIG_CPUSETS
35#define INIT_CPUSET_SEQ(tsk) \
36 .mems_allowed_seq = SEQCNT_ZERO(tsk.mems_allowed_seq),
37#else
38#define INIT_CPUSET_SEQ(tsk)
39#endif
40
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), \
44},
45#else
46#define INIT_PREV_CPUTIME(x)
47#endif
48
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) \
53 .cpu_timers = { \
54 LIST_HEAD_INIT(s.cpu_timers[0]), \
55 LIST_HEAD_INIT(s.cpu_timers[1]), \
56 LIST_HEAD_INIT(s.cpu_timers[2]), \
57 },
58#define INIT_CPUTIMER(s) \
59 .cputimer = { \
60 .cputime_atomic = INIT_CPUTIME_ATOMIC, \
61 .running = false, \
62 .checking_timer = false, \
63 },
64#else
65#define INIT_POSIX_TIMERS(s)
66#define INIT_CPU_TIMERS(s)
67#define INIT_CPUTIMER(s)
68#endif
69
70#define INIT_SIGNALS(sig) { \
71 .nr_threads = 1, \
72 .thread_head = LIST_HEAD_INIT(init_task.thread_node), \
73 .wait_chldexit = __WAIT_QUEUE_HEAD_INITIALIZER(sig.wait_chldexit),\
74 .shared_pending = { \
75 .list = LIST_HEAD_INIT(sig.shared_pending.list), \
76 .signal = {{0}}}, \
77 INIT_POSIX_TIMERS(sig) \
78 INIT_CPU_TIMERS(sig) \
79 .rlim = INIT_RLIMITS, \
80 INIT_CPUTIMER(sig) \
81 INIT_PREV_CPUTIME(sig) \
82 .cred_guard_mutex = \
83 __MUTEX_INITIALIZER(sig.cred_guard_mutex), \
84}
85
86extern struct nsproxy init_nsproxy;
87
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), \
93}
94
95extern struct group_info init_groups;
96
97#define INIT_STRUCT_PID { \
98 .count = ATOMIC_INIT(1), \
99 .tasks = { \
100 { .first = NULL }, \
101 { .first = NULL }, \
102 { .first = NULL }, \
103 }, \
104 .level = 0, \
105 .numbers = { { \
106 .nr = 0, \
107 .ns = &init_pid_ns, \
108 .pid_chain = { .next = NULL, .pprev = NULL }, \
109 }, } \
110}
111
112#define INIT_PID_LINK(type) \
113{ \
114 .node = { \
115 .next = NULL, \
116 .pprev = NULL, \
117 }, \
118 .pid = &init_struct_pid, \
119}
120
121#ifdef CONFIG_AUDITSYSCALL
122#define INIT_IDS \
123 .loginuid = INVALID_UID, \
124 .sessionid = (unsigned int)-1,
125#else
126#define INIT_IDS
127#endif
128
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,
135#else
136#define INIT_TASK_RCU_PREEMPT(tsk)
137#endif
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,
144#else
145#define INIT_TASK_RCU_TASKS(tsk)
146#endif
147
148extern struct cred init_cred;
149
150#ifdef CONFIG_CGROUP_SCHED
151# define INIT_CGROUP_SCHED(tsk) \
152 .sched_task_group = &root_task_group,
153#else
154# define INIT_CGROUP_SCHED(tsk)
155#endif
156
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),
162#else
163# define INIT_PERF_EVENTS(tsk)
164#endif
165
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,
171#else
172# define INIT_VTIME(tsk)
173#endif
174
175#define INIT_TASK_COMM "swapper"
176
177#ifdef CONFIG_RT_MUTEXES
178# define INIT_RT_MUTEXES(tsk) \
179 .pi_waiters = RB_ROOT_CACHED, \
180 .pi_top_task = NULL,
181#else
182# define INIT_RT_MUTEXES(tsk)
183#endif
184
185#ifdef CONFIG_NUMA_BALANCING
186# define INIT_NUMA_BALANCING(tsk) \
187 .numa_preferred_nid = -1, \
188 .numa_group = NULL, \
189 .numa_faults = NULL,
190#else
191# define INIT_NUMA_BALANCING(tsk)
192#endif
193
194#ifdef CONFIG_KASAN
195# define INIT_KASAN(tsk) \
196 .kasan_depth = 1,
197#else
198# define INIT_KASAN(tsk)
199#endif
200
201#ifdef CONFIG_LIVEPATCH
202# define INIT_LIVEPATCH(tsk) \
203 .patch_state = KLP_UNDEFINED,
204#else
205# define INIT_LIVEPATCH(tsk)
206#endif
207
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),
212#else
213# define INIT_TASK_TI(tsk)
214#endif
215
216#ifdef CONFIG_SECURITY
217#define INIT_TASK_SECURITY .security = NULL,
218#else
219#define INIT_TASK_SECURITY
220#endif
221
222/*
223 * INIT_TASK is used to set up the first task table, touch at
224 * your own risk!. Base=0, limit=0x1fffff (=2MB)
225 */
226#define INIT_TASK(tsk) \
227{ \
228 INIT_TASK_TI(tsk) \
229 .state = 0, \
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, \
239 .mm = NULL, \
240 .active_mm = &init_mm, \
241 .restart_block = { \
242 .fn = do_no_restart_syscall, \
243 }, \
244 .se = { \
245 .group_node = LIST_HEAD_INIT(tsk.se.group_node), \
246 }, \
247 .rt = { \
248 .run_list = LIST_HEAD_INIT(tsk.rt.run_list), \
249 .time_slice = RR_TIMESLICE, \
250 }, \
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, \
257 .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, \
265 .fs = &init_fs, \
266 .files = &init_files, \
267 .signal = &init_signals, \
268 .sighand = &init_sighand, \
269 .nsproxy = &init_nsproxy, \
270 .pending = { \
271 .list = LIST_HEAD_INIT(tsk.pending.list), \
272 .signal = {{0}}}, \
273 .blocked = {{0}}, \
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 */ \
279 .pids = { \
280 [PIDTYPE_PID] = INIT_PID_LINK(PIDTYPE_PID), \
281 [PIDTYPE_PGID] = INIT_PID_LINK(PIDTYPE_PGID), \
282 [PIDTYPE_SID] = INIT_PID_LINK(PIDTYPE_SID), \
283 }, \
284 .thread_group = LIST_HEAD_INIT(tsk.thread_group), \
285 .thread_node = LIST_HEAD_INIT(init_signals.thread_head), \
286 INIT_IDS \
287 INIT_PERF_EVENTS(tsk) \
288 INIT_TRACE_IRQFLAGS \
289 INIT_LOCKDEP \
290 INIT_FTRACE_GRAPH \
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) \
297 INIT_VTIME(tsk) \
298 INIT_NUMA_BALANCING(tsk) \
299 INIT_KASAN(tsk) \
300 INIT_LIVEPATCH(tsk) \
301 INIT_TASK_SECURITY \
302}
303
304
305/* Attach to the init_task data structure for proper alignment */
306#define __init_task_data __attribute__((__section__(".data..init_task")))
307
308
309#endif