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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#ifndef _LINUX__INIT_TASK_H
2#define _LINUX__INIT_TASK_H
3
Dipankar Sarmaab2af1f2005-09-09 13:04:13 -07004#include <linux/rcupdate.h>
Ingo Molnarde30a2b2006-07-03 00:24:42 -07005#include <linux/irqflags.h>
Serge E. Hallyn4865ecf2006-10-02 02:18:14 -07006#include <linux/utsname.h>
Ingo Molnarfbb9ce952006-07-03 00:24:50 -07007#include <linux/lockdep.h>
Steven Rostedt5ac9f622009-03-25 20:55:00 -04008#include <linux/ftrace.h>
Kirill Korotaev73ea4132006-10-02 02:18:20 -07009#include <linux/ipc.h>
Cedric Le Goater9a575a92006-12-08 02:37:59 -080010#include <linux/pid_namespace.h>
Cedric Le Goateracce2922007-07-15 23:40:59 -070011#include <linux/user_namespace.h>
Andrew G. Morgan3898b1b2008-04-28 02:13:40 -070012#include <linux/securebits.h>
Frederic Weisbecker6a616712012-12-16 20:00:34 +010013#include <linux/seqlock.h>
Eric W. Biederman772698f2007-09-12 11:55:17 +020014#include <net/net_namespace.h>
Ingo Molnar77852fe2013-02-16 09:46:48 +010015#include <linux/sched/rt.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070016
Dario Faggioli806c09a2010-11-30 19:51:33 +010017#ifdef CONFIG_SMP
18# define INIT_PUSHABLE_TASKS(tsk) \
19 .pushable_tasks = PLIST_NODE_INIT(tsk.pushable_tasks, MAX_PRIO),
20#else
21# define INIT_PUSHABLE_TASKS(tsk)
22#endif
23
Al Virof52111b2008-05-08 18:19:16 -040024extern struct files_struct init_files;
Al Viro18d8fda2008-12-26 00:35:37 -050025extern struct fs_struct init_fs;
Linus Torvalds1da177e2005-04-16 15:20:36 -070026
Ben Blum4714d1d2011-05-26 16:25:18 -070027#ifdef CONFIG_CGROUPS
Tejun Heo257058a2011-12-12 18:12:21 -080028#define INIT_GROUP_RWSEM(sig) \
29 .group_rwsem = __RWSEM_INITIALIZER(sig.group_rwsem),
Ben Blum4714d1d2011-05-26 16:25:18 -070030#else
Tejun Heo257058a2011-12-12 18:12:21 -080031#define INIT_GROUP_RWSEM(sig)
Ben Blum4714d1d2011-05-26 16:25:18 -070032#endif
33
Mel Gormancc9a6c82012-03-21 16:34:11 -070034#ifdef CONFIG_CPUSETS
John Stultz1ca7d672013-10-07 15:51:59 -070035#define INIT_CPUSET_SEQ(tsk) \
36 .mems_allowed_seq = SEQCNT_ZERO(tsk.mems_allowed_seq),
Mel Gormancc9a6c82012-03-21 16:34:11 -070037#else
John Stultz1ca7d672013-10-07 15:51:59 -070038#define INIT_CPUSET_SEQ(tsk)
Mel Gormancc9a6c82012-03-21 16:34:11 -070039#endif
40
Cedric Le Goater1ec320a2006-12-08 02:37:55 -080041#define INIT_SIGNALS(sig) { \
Oleg Nesterovb3ac0222010-05-26 14:43:24 -070042 .nr_threads = 1, \
Linus Torvalds1da177e2005-04-16 15:20:36 -070043 .wait_chldexit = __WAIT_QUEUE_HEAD_INITIALIZER(sig.wait_chldexit),\
Cedric Le Goater1ec320a2006-12-08 02:37:55 -080044 .shared_pending = { \
Linus Torvalds1da177e2005-04-16 15:20:36 -070045 .list = LIST_HEAD_INIT(sig.shared_pending.list), \
Cedric Le Goater1ec320a2006-12-08 02:37:55 -080046 .signal = {{0}}}, \
Linus Torvalds1da177e2005-04-16 15:20:36 -070047 .posix_timers = LIST_HEAD_INIT(sig.posix_timers), \
48 .cpu_timers = INIT_CPU_TIMERS(sig.cpu_timers), \
49 .rlim = INIT_RLIMITS, \
Peter Zijlstra4cd4c1b2009-02-05 12:24:16 +010050 .cputimer = { \
51 .cputime = INIT_CPUTIME, \
52 .running = 0, \
Thomas Gleixneree30a7b2009-07-25 18:56:56 +020053 .lock = __RAW_SPIN_LOCK_UNLOCKED(sig.cputimer.lock), \
Peter Zijlstra4cd4c1b2009-02-05 12:24:16 +010054 }, \
KOSAKI Motohiro9b1bf122010-10-27 15:34:08 -070055 .cred_guard_mutex = \
56 __MUTEX_INITIALIZER(sig.cred_guard_mutex), \
Tejun Heo257058a2011-12-12 18:12:21 -080057 INIT_GROUP_RWSEM(sig) \
Linus Torvalds1da177e2005-04-16 15:20:36 -070058}
59
Serge E. Hallynab516012006-10-02 02:18:06 -070060extern struct nsproxy init_nsproxy;
Serge E. Hallynab516012006-10-02 02:18:06 -070061
Linus Torvalds1da177e2005-04-16 15:20:36 -070062#define INIT_SIGHAND(sighand) { \
63 .count = ATOMIC_INIT(1), \
Oleg Nesterov0a14a132010-05-26 14:44:12 -070064 .action = { { { .sa_handler = SIG_DFL, } }, }, \
Ingo Molnare4d91912006-07-03 00:24:34 -070065 .siglock = __SPIN_LOCK_UNLOCKED(sighand.siglock), \
Davide Libenzib8fceee2007-09-20 12:40:16 -070066 .signalfd_wqh = __WAIT_QUEUE_HEAD_INITIALIZER(sighand.signalfd_wqh), \
Linus Torvalds1da177e2005-04-16 15:20:36 -070067}
68
69extern struct group_info init_groups;
70
Sukadev Bhattiprolu820e45d2007-05-10 22:23:00 -070071#define INIT_STRUCT_PID { \
72 .count = ATOMIC_INIT(1), \
Sukadev Bhattiprolu820e45d2007-05-10 22:23:00 -070073 .tasks = { \
Oleg Nesterovf2001142010-05-26 14:44:10 -070074 { .first = NULL }, \
75 { .first = NULL }, \
76 { .first = NULL }, \
Sukadev Bhattiprolu820e45d2007-05-10 22:23:00 -070077 }, \
Sukadev Bhattiprolu4c3f2ea2007-10-18 23:40:03 -070078 .level = 0, \
79 .numbers = { { \
80 .nr = 0, \
81 .ns = &init_pid_ns, \
82 .pid_chain = { .next = NULL, .pprev = NULL }, \
83 }, } \
Sukadev Bhattiprolu820e45d2007-05-10 22:23:00 -070084}
85
86#define INIT_PID_LINK(type) \
87{ \
88 .node = { \
89 .next = NULL, \
Oleg Nesterovf2001142010-05-26 14:44:10 -070090 .pprev = NULL, \
Sukadev Bhattiprolu820e45d2007-05-10 22:23:00 -070091 }, \
92 .pid = &init_struct_pid, \
93}
94
Al Virobfef93a2008-01-10 04:53:18 -050095#ifdef CONFIG_AUDITSYSCALL
96#define INIT_IDS \
Eric W. Biedermane1760bd2012-09-10 22:39:43 -070097 .loginuid = INVALID_UID, \
Eric Paris4746ec52008-01-08 10:06:53 -050098 .sessionid = -1,
Al Virobfef93a2008-01-10 04:53:18 -050099#else
100#define INIT_IDS
101#endif
Serge E. Hallyn3b7391d2008-02-04 22:29:45 -0800102
Paul E. McKenney24278d12010-09-27 17:25:23 -0700103#ifdef CONFIG_RCU_BOOST
104#define INIT_TASK_RCU_BOOST() \
105 .rcu_boost_mutex = NULL,
106#else
107#define INIT_TASK_RCU_BOOST()
108#endif
Paul E. McKenney6b3ef482009-08-22 13:56:53 -0700109#ifdef CONFIG_TREE_PREEMPT_RCU
Paul E. McKenneya57eb942010-06-29 16:49:16 -0700110#define INIT_TASK_RCU_TREE_PREEMPT() \
111 .rcu_blocked_node = NULL,
112#else
113#define INIT_TASK_RCU_TREE_PREEMPT(tsk)
114#endif
115#ifdef CONFIG_PREEMPT_RCU
Paul E. McKenneyf41d9112009-08-22 13:56:52 -0700116#define INIT_TASK_RCU_PREEMPT(tsk) \
117 .rcu_read_lock_nesting = 0, \
118 .rcu_read_unlock_special = 0, \
Paul E. McKenneya57eb942010-06-29 16:49:16 -0700119 .rcu_node_entry = LIST_HEAD_INIT(tsk.rcu_node_entry), \
Paul E. McKenney24278d12010-09-27 17:25:23 -0700120 INIT_TASK_RCU_TREE_PREEMPT() \
121 INIT_TASK_RCU_BOOST()
Paul E. McKenneyf41d9112009-08-22 13:56:52 -0700122#else
123#define INIT_TASK_RCU_PREEMPT(tsk)
124#endif
125
David Howellsb6dff3e2008-11-14 10:39:16 +1100126extern struct cred init_cred;
127
Peter Zijlstra8323f262012-06-22 13:36:05 +0200128extern struct task_group root_task_group;
129
130#ifdef CONFIG_CGROUP_SCHED
131# define INIT_CGROUP_SCHED(tsk) \
132 .sched_task_group = &root_task_group,
133#else
134# define INIT_CGROUP_SCHED(tsk)
135#endif
136
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200137#ifdef CONFIG_PERF_EVENTS
Peter Zijlstra8323f262012-06-22 13:36:05 +0200138# define INIT_PERF_EVENTS(tsk) \
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200139 .perf_event_mutex = \
140 __MUTEX_INITIALIZER(tsk.perf_event_mutex), \
141 .perf_event_list = LIST_HEAD_INIT(tsk.perf_event_list),
Peter Zijlstra082ff5a2009-05-23 18:29:00 +0200142#else
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200143# define INIT_PERF_EVENTS(tsk)
Peter Zijlstra082ff5a2009-05-23 18:29:00 +0200144#endif
145
Frederic Weisbecker6a616712012-12-16 20:00:34 +0100146#ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN
147# define INIT_VTIME(tsk) \
148 .vtime_seqlock = __SEQLOCK_UNLOCKED(tsk.vtime_seqlock), \
149 .vtime_snap = 0, \
150 .vtime_snap_whence = VTIME_SYS,
151#else
152# define INIT_VTIME(tsk)
153#endif
154
Carsten Emdef1c6f1a2011-10-26 23:14:16 +0200155#define INIT_TASK_COMM "swapper"
156
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157/*
158 * INIT_TASK is used to set up the first task table, touch at
159 * your own risk!. Base=0, limit=0x1fffff (=2MB)
160 */
161#define INIT_TASK(tsk) \
162{ \
163 .state = 0, \
Roman Zippelf7e42172007-05-09 02:35:17 -0700164 .stack = &init_thread_info, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165 .usage = ATOMIC_INIT(2), \
Oleg Nesterov7b34e422008-07-25 01:47:37 -0700166 .flags = PF_KTHREAD, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167 .prio = MAX_PRIO-20, \
168 .static_prio = MAX_PRIO-20, \
Ingo Molnarb29739f2006-06-27 02:54:51 -0700169 .normal_prio = MAX_PRIO-20, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170 .policy = SCHED_NORMAL, \
171 .cpus_allowed = CPU_MASK_ALL, \
Peter Zijlstra29baa742012-04-23 12:11:21 +0200172 .nr_cpus_allowed= NR_CPUS, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173 .mm = NULL, \
174 .active_mm = &init_mm, \
Peter Zijlstra4a55bd52008-04-19 19:45:00 +0200175 .se = { \
176 .group_node = LIST_HEAD_INIT(tsk.se.group_node), \
177 }, \
Peter Zijlstrafa717062008-01-25 21:08:27 +0100178 .rt = { \
179 .run_list = LIST_HEAD_INIT(tsk.rt.run_list), \
Hiroshi Shimamotode5bdff2012-02-16 14:52:21 +0900180 .time_slice = RR_TIMESLICE, \
Peter Zijlstra6f505b12008-01-25 21:08:30 +0100181 }, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182 .tasks = LIST_HEAD_INIT(tsk.tasks), \
Dario Faggioli806c09a2010-11-30 19:51:33 +0100183 INIT_PUSHABLE_TASKS(tsk) \
Peter Zijlstra8323f262012-06-22 13:36:05 +0200184 INIT_CGROUP_SCHED(tsk) \
Roland McGrathf4700212008-03-24 18:36:23 -0700185 .ptraced = LIST_HEAD_INIT(tsk.ptraced), \
186 .ptrace_entry = LIST_HEAD_INIT(tsk.ptrace_entry), \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187 .real_parent = &tsk, \
188 .parent = &tsk, \
189 .children = LIST_HEAD_INIT(tsk.children), \
190 .sibling = LIST_HEAD_INIT(tsk.sibling), \
191 .group_leader = &tsk, \
Paul E. McKenneyd36cc702012-05-16 15:33:15 -0700192 RCU_POINTER_INITIALIZER(real_cred, &init_cred), \
193 RCU_POINTER_INITIALIZER(cred, &init_cred), \
Carsten Emdef1c6f1a2011-10-26 23:14:16 +0200194 .comm = INIT_TASK_COMM, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195 .thread = INIT_THREAD, \
196 .fs = &init_fs, \
197 .files = &init_files, \
198 .signal = &init_signals, \
199 .sighand = &init_sighand, \
Serge E. Hallynab516012006-10-02 02:18:06 -0700200 .nsproxy = &init_nsproxy, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201 .pending = { \
202 .list = LIST_HEAD_INIT(tsk.pending.list), \
203 .signal = {{0}}}, \
204 .blocked = {{0}}, \
Ingo Molnare4d91912006-07-03 00:24:34 -0700205 .alloc_lock = __SPIN_LOCK_UNLOCKED(tsk.alloc_lock), \
Linus Torvaldsb6e32242009-12-17 13:23:24 -0800206 .journal_info = NULL, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700207 .cpu_timers = INIT_CPU_TIMERS(tsk.cpu_timers), \
Thomas Gleixner1d615482009-11-17 14:54:03 +0100208 .pi_lock = __RAW_SPIN_LOCK_UNLOCKED(tsk.pi_lock), \
Arjan van de Ven69766752008-09-01 15:52:40 -0700209 .timer_slack_ns = 50000, /* 50 usec default slack */ \
Sukadev Bhattiprolu820e45d2007-05-10 22:23:00 -0700210 .pids = { \
211 [PIDTYPE_PID] = INIT_PID_LINK(PIDTYPE_PID), \
212 [PIDTYPE_PGID] = INIT_PID_LINK(PIDTYPE_PGID), \
213 [PIDTYPE_SID] = INIT_PID_LINK(PIDTYPE_SID), \
214 }, \
Oleg Nesterovfa2755e2010-05-26 14:44:08 -0700215 .thread_group = LIST_HEAD_INIT(tsk.thread_group), \
Al Virobfef93a2008-01-10 04:53:18 -0500216 INIT_IDS \
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200217 INIT_PERF_EVENTS(tsk) \
Ingo Molnarde30a2b2006-07-03 00:24:42 -0700218 INIT_TRACE_IRQFLAGS \
Ingo Molnarfbb9ce952006-07-03 00:24:50 -0700219 INIT_LOCKDEP \
Steven Rostedt5ac9f622009-03-25 20:55:00 -0400220 INIT_FTRACE_GRAPH \
Steven Rostedt261842b2009-04-16 21:41:52 -0400221 INIT_TRACE_RECURSION \
Paul E. McKenneyf41d9112009-08-22 13:56:52 -0700222 INIT_TASK_RCU_PREEMPT(tsk) \
John Stultz1ca7d672013-10-07 15:51:59 -0700223 INIT_CPUSET_SEQ(tsk) \
Frederic Weisbecker6a616712012-12-16 20:00:34 +0100224 INIT_VTIME(tsk) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700225}
226
227
228#define INIT_CPU_TIMERS(cpu_timers) \
229{ \
230 LIST_HEAD_INIT(cpu_timers[0]), \
231 LIST_HEAD_INIT(cpu_timers[1]), \
232 LIST_HEAD_INIT(cpu_timers[2]), \
233}
234
Tim Abbott857ecee2009-06-23 19:59:36 -0400235/* Attach to the init_task data structure for proper alignment */
Tim Abbott2af76872010-02-20 01:03:35 +0100236#define __init_task_data __attribute__((__section__(".data..init_task")))
Tim Abbott857ecee2009-06-23 19:59:36 -0400237
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238
239#endif