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v5.14.15
 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/refcount.h>
17#include <linux/sched/autogroup.h>
18#include <net/net_namespace.h>
19#include <linux/sched/rt.h>
20#include <linux/livepatch.h>
21#include <linux/mm_types.h>
22
23#include <asm/thread_info.h>
 
 
 
 
 
24
25extern struct files_struct init_files;
26extern struct fs_struct init_fs;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
27extern struct nsproxy init_nsproxy;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
28extern struct cred init_cred;
29
30#ifndef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
31#define INIT_PREV_CPUTIME(x)	.prev_cputime = {			\
32	.lock = __RAW_SPIN_LOCK_UNLOCKED(x.prev_cputime.lock),		\
33},
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
34#else
35#define INIT_PREV_CPUTIME(x)
36#endif
37
38#define INIT_TASK_COMM "swapper"
39
40/* Attach to the init_task data structure for proper alignment */
41#ifdef CONFIG_ARCH_TASK_STRUCT_ON_STACK
42#define __init_task_data __section(".data..init_task")
 
43#else
44#define __init_task_data /**/
45#endif
46
47/* Attach to the thread_info data structure for proper alignment */
48#define __init_thread_info __section(".data..init_thread_info")
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
49
50#endif
v3.15
 
  1#ifndef _LINUX__INIT_TASK_H
  2#define _LINUX__INIT_TASK_H
  3
  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>
  9#include <linux/ipc.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>
 
 
 17
 18#ifdef CONFIG_SMP
 19# define INIT_PUSHABLE_TASKS(tsk)					\
 20	.pushable_tasks = PLIST_NODE_INIT(tsk.pushable_tasks, MAX_PRIO),
 21#else
 22# define INIT_PUSHABLE_TASKS(tsk)
 23#endif
 24
 25extern struct files_struct init_files;
 26extern struct fs_struct init_fs;
 27
 28#ifdef CONFIG_CGROUPS
 29#define INIT_GROUP_RWSEM(sig)						\
 30	.group_rwsem = __RWSEM_INITIALIZER(sig.group_rwsem),
 31#else
 32#define INIT_GROUP_RWSEM(sig)
 33#endif
 34
 35#ifdef CONFIG_CPUSETS
 36#define INIT_CPUSET_SEQ(tsk)							\
 37	.mems_allowed_seq = SEQCNT_ZERO(tsk.mems_allowed_seq),
 38#else
 39#define INIT_CPUSET_SEQ(tsk)
 40#endif
 41
 42#define INIT_SIGNALS(sig) {						\
 43	.nr_threads	= 1,						\
 44	.thread_head	= LIST_HEAD_INIT(init_task.thread_node),	\
 45	.wait_chldexit	= __WAIT_QUEUE_HEAD_INITIALIZER(sig.wait_chldexit),\
 46	.shared_pending	= { 						\
 47		.list = LIST_HEAD_INIT(sig.shared_pending.list),	\
 48		.signal =  {{0}}},					\
 49	.posix_timers	 = LIST_HEAD_INIT(sig.posix_timers),		\
 50	.cpu_timers	= INIT_CPU_TIMERS(sig.cpu_timers),		\
 51	.rlim		= INIT_RLIMITS,					\
 52	.cputimer	= { 						\
 53		.cputime = INIT_CPUTIME,				\
 54		.running = 0,						\
 55		.lock = __RAW_SPIN_LOCK_UNLOCKED(sig.cputimer.lock),	\
 56	},								\
 57	.cred_guard_mutex =						\
 58		 __MUTEX_INITIALIZER(sig.cred_guard_mutex),		\
 59	INIT_GROUP_RWSEM(sig)						\
 60}
 61
 62extern struct nsproxy init_nsproxy;
 63
 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),	\
 69}
 70
 71extern struct group_info init_groups;
 72
 73#define INIT_STRUCT_PID {						\
 74	.count 		= ATOMIC_INIT(1),				\
 75	.tasks		= {						\
 76		{ .first = NULL },					\
 77		{ .first = NULL },					\
 78		{ .first = NULL },					\
 79	},								\
 80	.level		= 0,						\
 81	.numbers	= { {						\
 82		.nr		= 0,					\
 83		.ns		= &init_pid_ns,				\
 84		.pid_chain	= { .next = NULL, .pprev = NULL },	\
 85	}, }								\
 86}
 87
 88#define INIT_PID_LINK(type) 					\
 89{								\
 90	.node = {						\
 91		.next = NULL,					\
 92		.pprev = NULL,					\
 93	},							\
 94	.pid = &init_struct_pid,				\
 95}
 96
 97#ifdef CONFIG_AUDITSYSCALL
 98#define INIT_IDS \
 99	.loginuid = INVALID_UID, \
100	.sessionid = (unsigned int)-1,
101#else
102#define INIT_IDS
103#endif
104
105#ifdef CONFIG_RCU_BOOST
106#define INIT_TASK_RCU_BOOST()						\
107	.rcu_boost_mutex = NULL,
108#else
109#define INIT_TASK_RCU_BOOST()
110#endif
111#ifdef CONFIG_TREE_PREEMPT_RCU
112#define INIT_TASK_RCU_TREE_PREEMPT()					\
113	.rcu_blocked_node = NULL,
114#else
115#define INIT_TASK_RCU_TREE_PREEMPT(tsk)
116#endif
117#ifdef CONFIG_PREEMPT_RCU
118#define INIT_TASK_RCU_PREEMPT(tsk)					\
119	.rcu_read_lock_nesting = 0,					\
120	.rcu_read_unlock_special = 0,					\
121	.rcu_node_entry = LIST_HEAD_INIT(tsk.rcu_node_entry),		\
122	INIT_TASK_RCU_TREE_PREEMPT()					\
123	INIT_TASK_RCU_BOOST()
124#else
125#define INIT_TASK_RCU_PREEMPT(tsk)
126#endif
127
128extern struct cred init_cred;
129
130extern struct task_group root_task_group;
131
132#ifdef CONFIG_CGROUP_SCHED
133# define INIT_CGROUP_SCHED(tsk)						\
134	.sched_task_group = &root_task_group,
135#else
136# define INIT_CGROUP_SCHED(tsk)
137#endif
138
139#ifdef CONFIG_PERF_EVENTS
140# define INIT_PERF_EVENTS(tsk)						\
141	.perf_event_mutex = 						\
142		 __MUTEX_INITIALIZER(tsk.perf_event_mutex),		\
143	.perf_event_list = LIST_HEAD_INIT(tsk.perf_event_list),
144#else
145# define INIT_PERF_EVENTS(tsk)
146#endif
147
148#ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN
149# define INIT_VTIME(tsk)						\
150	.vtime_seqlock = __SEQLOCK_UNLOCKED(tsk.vtime_seqlock),	\
151	.vtime_snap = 0,				\
152	.vtime_snap_whence = VTIME_SYS,
153#else
154# define INIT_VTIME(tsk)
155#endif
156
157#define INIT_TASK_COMM "swapper"
158
159#ifdef CONFIG_RT_MUTEXES
160# define INIT_RT_MUTEXES(tsk)						\
161	.pi_waiters = RB_ROOT,						\
162	.pi_waiters_leftmost = NULL,
163#else
164# define INIT_RT_MUTEXES(tsk)
165#endif
166
167/*
168 *  INIT_TASK is used to set up the first task table, touch at
169 * your own risk!. Base=0, limit=0x1fffff (=2MB)
170 */
171#define INIT_TASK(tsk)	\
172{									\
173	.state		= 0,						\
174	.stack		= &init_thread_info,				\
175	.usage		= ATOMIC_INIT(2),				\
176	.flags		= PF_KTHREAD,					\
177	.prio		= MAX_PRIO-20,					\
178	.static_prio	= MAX_PRIO-20,					\
179	.normal_prio	= MAX_PRIO-20,					\
180	.policy		= SCHED_NORMAL,					\
181	.cpus_allowed	= CPU_MASK_ALL,					\
182	.nr_cpus_allowed= NR_CPUS,					\
183	.mm		= NULL,						\
184	.active_mm	= &init_mm,					\
185	.se		= {						\
186		.group_node 	= LIST_HEAD_INIT(tsk.se.group_node),	\
187	},								\
188	.rt		= {						\
189		.run_list	= LIST_HEAD_INIT(tsk.rt.run_list),	\
190		.time_slice	= RR_TIMESLICE,				\
191	},								\
192	.tasks		= LIST_HEAD_INIT(tsk.tasks),			\
193	INIT_PUSHABLE_TASKS(tsk)					\
194	INIT_CGROUP_SCHED(tsk)						\
195	.ptraced	= LIST_HEAD_INIT(tsk.ptraced),			\
196	.ptrace_entry	= LIST_HEAD_INIT(tsk.ptrace_entry),		\
197	.real_parent	= &tsk,						\
198	.parent		= &tsk,						\
199	.children	= LIST_HEAD_INIT(tsk.children),			\
200	.sibling	= LIST_HEAD_INIT(tsk.sibling),			\
201	.group_leader	= &tsk,						\
202	RCU_POINTER_INITIALIZER(real_cred, &init_cred),			\
203	RCU_POINTER_INITIALIZER(cred, &init_cred),			\
204	.comm		= INIT_TASK_COMM,				\
205	.thread		= INIT_THREAD,					\
206	.fs		= &init_fs,					\
207	.files		= &init_files,					\
208	.signal		= &init_signals,				\
209	.sighand	= &init_sighand,				\
210	.nsproxy	= &init_nsproxy,				\
211	.pending	= {						\
212		.list = LIST_HEAD_INIT(tsk.pending.list),		\
213		.signal = {{0}}},					\
214	.blocked	= {{0}},					\
215	.alloc_lock	= __SPIN_LOCK_UNLOCKED(tsk.alloc_lock),		\
216	.journal_info	= NULL,						\
217	.cpu_timers	= INIT_CPU_TIMERS(tsk.cpu_timers),		\
218	.pi_lock	= __RAW_SPIN_LOCK_UNLOCKED(tsk.pi_lock),	\
219	.timer_slack_ns = 50000, /* 50 usec default slack */		\
220	.pids = {							\
221		[PIDTYPE_PID]  = INIT_PID_LINK(PIDTYPE_PID),		\
222		[PIDTYPE_PGID] = INIT_PID_LINK(PIDTYPE_PGID),		\
223		[PIDTYPE_SID]  = INIT_PID_LINK(PIDTYPE_SID),		\
224	},								\
225	.thread_group	= LIST_HEAD_INIT(tsk.thread_group),		\
226	.thread_node	= LIST_HEAD_INIT(init_signals.thread_head),	\
227	INIT_IDS							\
228	INIT_PERF_EVENTS(tsk)						\
229	INIT_TRACE_IRQFLAGS						\
230	INIT_LOCKDEP							\
231	INIT_FTRACE_GRAPH						\
232	INIT_TRACE_RECURSION						\
233	INIT_TASK_RCU_PREEMPT(tsk)					\
234	INIT_CPUSET_SEQ(tsk)						\
235	INIT_RT_MUTEXES(tsk)						\
236	INIT_VTIME(tsk)							\
237}
238
239
240#define INIT_CPU_TIMERS(cpu_timers)					\
241{									\
242	LIST_HEAD_INIT(cpu_timers[0]),					\
243	LIST_HEAD_INIT(cpu_timers[1]),					\
244	LIST_HEAD_INIT(cpu_timers[2]),					\
245}
246
247/* Attach to the init_task data structure for proper alignment */
248#define __init_task_data __attribute__((__section__(".data..init_task")))
249
250
251#endif