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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>
Peter Zijlstrafb00aca2013-11-07 14:43:43 +010014#include <linux/rbtree.h>
Eric W. Biederman772698f2007-09-12 11:55:17 +020015#include <net/net_namespace.h>
Ingo Molnar77852fe2013-02-16 09:46:48 +010016#include <linux/sched/rt.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070017
Dario Faggioli806c09a2010-11-30 19:51:33 +010018#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
Al Virof52111b2008-05-08 18:19:16 -040025extern struct files_struct init_files;
Al Viro18d8fda2008-12-26 00:35:37 -050026extern struct fs_struct init_fs;
Linus Torvalds1da177e2005-04-16 15:20:36 -070027
Ben Blum4714d1d2011-05-26 16:25:18 -070028#ifdef CONFIG_CGROUPS
Tejun Heo257058a2011-12-12 18:12:21 -080029#define INIT_GROUP_RWSEM(sig) \
30 .group_rwsem = __RWSEM_INITIALIZER(sig.group_rwsem),
Ben Blum4714d1d2011-05-26 16:25:18 -070031#else
Tejun Heo257058a2011-12-12 18:12:21 -080032#define INIT_GROUP_RWSEM(sig)
Ben Blum4714d1d2011-05-26 16:25:18 -070033#endif
34
Mel Gormancc9a6c82012-03-21 16:34:11 -070035#ifdef CONFIG_CPUSETS
John Stultz1ca7d672013-10-07 15:51:59 -070036#define INIT_CPUSET_SEQ(tsk) \
37 .mems_allowed_seq = SEQCNT_ZERO(tsk.mems_allowed_seq),
Mel Gormancc9a6c82012-03-21 16:34:11 -070038#else
John Stultz1ca7d672013-10-07 15:51:59 -070039#define INIT_CPUSET_SEQ(tsk)
Mel Gormancc9a6c82012-03-21 16:34:11 -070040#endif
41
Cedric Le Goater1ec320a2006-12-08 02:37:55 -080042#define INIT_SIGNALS(sig) { \
Oleg Nesterovb3ac0222010-05-26 14:43:24 -070043 .nr_threads = 1, \
Oleg Nesterov0c740d02014-01-21 15:49:56 -080044 .thread_head = LIST_HEAD_INIT(init_task.thread_node), \
Linus Torvalds1da177e2005-04-16 15:20:36 -070045 .wait_chldexit = __WAIT_QUEUE_HEAD_INITIALIZER(sig.wait_chldexit),\
Cedric Le Goater1ec320a2006-12-08 02:37:55 -080046 .shared_pending = { \
Linus Torvalds1da177e2005-04-16 15:20:36 -070047 .list = LIST_HEAD_INIT(sig.shared_pending.list), \
Cedric Le Goater1ec320a2006-12-08 02:37:55 -080048 .signal = {{0}}}, \
Linus Torvalds1da177e2005-04-16 15:20:36 -070049 .posix_timers = LIST_HEAD_INIT(sig.posix_timers), \
50 .cpu_timers = INIT_CPU_TIMERS(sig.cpu_timers), \
51 .rlim = INIT_RLIMITS, \
Peter Zijlstra4cd4c1b2009-02-05 12:24:16 +010052 .cputimer = { \
53 .cputime = INIT_CPUTIME, \
54 .running = 0, \
Thomas Gleixneree30a7b2009-07-25 18:56:56 +020055 .lock = __RAW_SPIN_LOCK_UNLOCKED(sig.cputimer.lock), \
Peter Zijlstra4cd4c1b2009-02-05 12:24:16 +010056 }, \
KOSAKI Motohiro9b1bf122010-10-27 15:34:08 -070057 .cred_guard_mutex = \
58 __MUTEX_INITIALIZER(sig.cred_guard_mutex), \
Tejun Heo257058a2011-12-12 18:12:21 -080059 INIT_GROUP_RWSEM(sig) \
Linus Torvalds1da177e2005-04-16 15:20:36 -070060}
61
Serge E. Hallynab516012006-10-02 02:18:06 -070062extern struct nsproxy init_nsproxy;
Serge E. Hallynab516012006-10-02 02:18:06 -070063
Linus Torvalds1da177e2005-04-16 15:20:36 -070064#define INIT_SIGHAND(sighand) { \
65 .count = ATOMIC_INIT(1), \
Oleg Nesterov0a14a132010-05-26 14:44:12 -070066 .action = { { { .sa_handler = SIG_DFL, } }, }, \
Ingo Molnare4d91912006-07-03 00:24:34 -070067 .siglock = __SPIN_LOCK_UNLOCKED(sighand.siglock), \
Davide Libenzib8fceee2007-09-20 12:40:16 -070068 .signalfd_wqh = __WAIT_QUEUE_HEAD_INITIALIZER(sighand.signalfd_wqh), \
Linus Torvalds1da177e2005-04-16 15:20:36 -070069}
70
71extern struct group_info init_groups;
72
Sukadev Bhattiprolu820e45d2007-05-10 22:23:00 -070073#define INIT_STRUCT_PID { \
74 .count = ATOMIC_INIT(1), \
Sukadev Bhattiprolu820e45d2007-05-10 22:23:00 -070075 .tasks = { \
Oleg Nesterovf2001142010-05-26 14:44:10 -070076 { .first = NULL }, \
77 { .first = NULL }, \
78 { .first = NULL }, \
Sukadev Bhattiprolu820e45d2007-05-10 22:23:00 -070079 }, \
Sukadev Bhattiprolu4c3f2ea2007-10-18 23:40:03 -070080 .level = 0, \
81 .numbers = { { \
82 .nr = 0, \
83 .ns = &init_pid_ns, \
84 .pid_chain = { .next = NULL, .pprev = NULL }, \
85 }, } \
Sukadev Bhattiprolu820e45d2007-05-10 22:23:00 -070086}
87
88#define INIT_PID_LINK(type) \
89{ \
90 .node = { \
91 .next = NULL, \
Oleg Nesterovf2001142010-05-26 14:44:10 -070092 .pprev = NULL, \
Sukadev Bhattiprolu820e45d2007-05-10 22:23:00 -070093 }, \
94 .pid = &init_struct_pid, \
95}
96
Al Virobfef93a2008-01-10 04:53:18 -050097#ifdef CONFIG_AUDITSYSCALL
98#define INIT_IDS \
Eric W. Biedermane1760bd2012-09-10 22:39:43 -070099 .loginuid = INVALID_UID, \
Eric Paris4440e852013-11-27 17:35:17 -0500100 .sessionid = (unsigned int)-1,
Al Virobfef93a2008-01-10 04:53:18 -0500101#else
102#define INIT_IDS
103#endif
Serge E. Hallyn3b7391d2008-02-04 22:29:45 -0800104
Pranith Kumar28f65692014-09-22 14:00:48 -0400105#ifdef CONFIG_PREEMPT_RCU
Paul E. McKenneya57eb942010-06-29 16:49:16 -0700106#define INIT_TASK_RCU_TREE_PREEMPT() \
107 .rcu_blocked_node = NULL,
108#else
109#define INIT_TASK_RCU_TREE_PREEMPT(tsk)
110#endif
111#ifdef CONFIG_PREEMPT_RCU
Paul E. McKenneyf41d9112009-08-22 13:56:52 -0700112#define INIT_TASK_RCU_PREEMPT(tsk) \
113 .rcu_read_lock_nesting = 0, \
Paul E. McKenney1d082fd2014-08-14 16:01:53 -0700114 .rcu_read_unlock_special.s = 0, \
Paul E. McKenneya57eb942010-06-29 16:49:16 -0700115 .rcu_node_entry = LIST_HEAD_INIT(tsk.rcu_node_entry), \
Paul E. McKenneyabaa93d2014-06-12 13:30:25 -0700116 INIT_TASK_RCU_TREE_PREEMPT()
Paul E. McKenneyf41d9112009-08-22 13:56:52 -0700117#else
118#define INIT_TASK_RCU_PREEMPT(tsk)
119#endif
Paul E. McKenney8315f422014-06-27 13:42:20 -0700120#ifdef CONFIG_TASKS_RCU
121#define INIT_TASK_RCU_TASKS(tsk) \
122 .rcu_tasks_holdout = false, \
123 .rcu_tasks_holdout_list = \
Paul E. McKenney176f8f72014-08-04 17:43:50 -0700124 LIST_HEAD_INIT(tsk.rcu_tasks_holdout_list), \
125 .rcu_tasks_idle_cpu = -1,
Paul E. McKenney8315f422014-06-27 13:42:20 -0700126#else
127#define INIT_TASK_RCU_TASKS(tsk)
128#endif
Paul E. McKenneyf41d9112009-08-22 13:56:52 -0700129
David Howellsb6dff3e2008-11-14 10:39:16 +1100130extern struct cred init_cred;
131
Peter Zijlstra8323f262012-06-22 13:36:05 +0200132extern struct task_group root_task_group;
133
134#ifdef CONFIG_CGROUP_SCHED
135# define INIT_CGROUP_SCHED(tsk) \
136 .sched_task_group = &root_task_group,
137#else
138# define INIT_CGROUP_SCHED(tsk)
139#endif
140
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200141#ifdef CONFIG_PERF_EVENTS
Peter Zijlstra8323f262012-06-22 13:36:05 +0200142# define INIT_PERF_EVENTS(tsk) \
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200143 .perf_event_mutex = \
144 __MUTEX_INITIALIZER(tsk.perf_event_mutex), \
145 .perf_event_list = LIST_HEAD_INIT(tsk.perf_event_list),
Peter Zijlstra082ff5a2009-05-23 18:29:00 +0200146#else
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200147# define INIT_PERF_EVENTS(tsk)
Peter Zijlstra082ff5a2009-05-23 18:29:00 +0200148#endif
149
Frederic Weisbecker6a616712012-12-16 20:00:34 +0100150#ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN
151# define INIT_VTIME(tsk) \
152 .vtime_seqlock = __SEQLOCK_UNLOCKED(tsk.vtime_seqlock), \
153 .vtime_snap = 0, \
154 .vtime_snap_whence = VTIME_SYS,
155#else
156# define INIT_VTIME(tsk)
157#endif
158
Carsten Emdef1c6f1a2011-10-26 23:14:16 +0200159#define INIT_TASK_COMM "swapper"
160
Peter Zijlstrafb00aca2013-11-07 14:43:43 +0100161#ifdef CONFIG_RT_MUTEXES
162# define INIT_RT_MUTEXES(tsk) \
163 .pi_waiters = RB_ROOT, \
164 .pi_waiters_leftmost = NULL,
165#else
166# define INIT_RT_MUTEXES(tsk)
167#endif
168
Kirill Tkhaid8b163c2014-11-11 12:46:29 +0300169#ifdef CONFIG_NUMA_BALANCING
170# define INIT_NUMA_BALANCING(tsk) \
171 .numa_preferred_nid = -1, \
172 .numa_group = NULL, \
173 .numa_faults = NULL,
174#else
175# define INIT_NUMA_BALANCING(tsk)
176#endif
177
Andrey Ryabininc420f162015-02-13 14:39:59 -0800178#ifdef CONFIG_KASAN
179# define INIT_KASAN(tsk) \
180 .kasan_depth = 1,
181#else
182# define INIT_KASAN(tsk)
183#endif
184
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185/*
186 * INIT_TASK is used to set up the first task table, touch at
187 * your own risk!. Base=0, limit=0x1fffff (=2MB)
188 */
189#define INIT_TASK(tsk) \
190{ \
191 .state = 0, \
Roman Zippelf7e42172007-05-09 02:35:17 -0700192 .stack = &init_thread_info, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193 .usage = ATOMIC_INIT(2), \
Oleg Nesterov7b34e422008-07-25 01:47:37 -0700194 .flags = PF_KTHREAD, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195 .prio = MAX_PRIO-20, \
196 .static_prio = MAX_PRIO-20, \
Ingo Molnarb29739f2006-06-27 02:54:51 -0700197 .normal_prio = MAX_PRIO-20, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198 .policy = SCHED_NORMAL, \
199 .cpus_allowed = CPU_MASK_ALL, \
Peter Zijlstra29baa742012-04-23 12:11:21 +0200200 .nr_cpus_allowed= NR_CPUS, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201 .mm = NULL, \
202 .active_mm = &init_mm, \
Andy Lutomirskif56141e2015-02-12 15:01:14 -0800203 .restart_block = { \
204 .fn = do_no_restart_syscall, \
205 }, \
Peter Zijlstra4a55bd52008-04-19 19:45:00 +0200206 .se = { \
207 .group_node = LIST_HEAD_INIT(tsk.se.group_node), \
208 }, \
Peter Zijlstrafa717062008-01-25 21:08:27 +0100209 .rt = { \
210 .run_list = LIST_HEAD_INIT(tsk.rt.run_list), \
Hiroshi Shimamotode5bdff2012-02-16 14:52:21 +0900211 .time_slice = RR_TIMESLICE, \
Peter Zijlstra6f505b12008-01-25 21:08:30 +0100212 }, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213 .tasks = LIST_HEAD_INIT(tsk.tasks), \
Dario Faggioli806c09a2010-11-30 19:51:33 +0100214 INIT_PUSHABLE_TASKS(tsk) \
Peter Zijlstra8323f262012-06-22 13:36:05 +0200215 INIT_CGROUP_SCHED(tsk) \
Roland McGrathf4700212008-03-24 18:36:23 -0700216 .ptraced = LIST_HEAD_INIT(tsk.ptraced), \
217 .ptrace_entry = LIST_HEAD_INIT(tsk.ptrace_entry), \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700218 .real_parent = &tsk, \
219 .parent = &tsk, \
220 .children = LIST_HEAD_INIT(tsk.children), \
221 .sibling = LIST_HEAD_INIT(tsk.sibling), \
222 .group_leader = &tsk, \
Paul E. McKenneyd36cc702012-05-16 15:33:15 -0700223 RCU_POINTER_INITIALIZER(real_cred, &init_cred), \
224 RCU_POINTER_INITIALIZER(cred, &init_cred), \
Carsten Emdef1c6f1a2011-10-26 23:14:16 +0200225 .comm = INIT_TASK_COMM, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226 .thread = INIT_THREAD, \
227 .fs = &init_fs, \
228 .files = &init_files, \
229 .signal = &init_signals, \
230 .sighand = &init_sighand, \
Serge E. Hallynab516012006-10-02 02:18:06 -0700231 .nsproxy = &init_nsproxy, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232 .pending = { \
233 .list = LIST_HEAD_INIT(tsk.pending.list), \
234 .signal = {{0}}}, \
235 .blocked = {{0}}, \
Ingo Molnare4d91912006-07-03 00:24:34 -0700236 .alloc_lock = __SPIN_LOCK_UNLOCKED(tsk.alloc_lock), \
Linus Torvaldsb6e32242009-12-17 13:23:24 -0800237 .journal_info = NULL, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238 .cpu_timers = INIT_CPU_TIMERS(tsk.cpu_timers), \
Thomas Gleixner1d615482009-11-17 14:54:03 +0100239 .pi_lock = __RAW_SPIN_LOCK_UNLOCKED(tsk.pi_lock), \
Arjan van de Ven69766752008-09-01 15:52:40 -0700240 .timer_slack_ns = 50000, /* 50 usec default slack */ \
Sukadev Bhattiprolu820e45d2007-05-10 22:23:00 -0700241 .pids = { \
242 [PIDTYPE_PID] = INIT_PID_LINK(PIDTYPE_PID), \
243 [PIDTYPE_PGID] = INIT_PID_LINK(PIDTYPE_PGID), \
244 [PIDTYPE_SID] = INIT_PID_LINK(PIDTYPE_SID), \
245 }, \
Oleg Nesterovfa2755e2010-05-26 14:44:08 -0700246 .thread_group = LIST_HEAD_INIT(tsk.thread_group), \
Oleg Nesterov0c740d02014-01-21 15:49:56 -0800247 .thread_node = LIST_HEAD_INIT(init_signals.thread_head), \
Al Virobfef93a2008-01-10 04:53:18 -0500248 INIT_IDS \
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200249 INIT_PERF_EVENTS(tsk) \
Ingo Molnarde30a2b2006-07-03 00:24:42 -0700250 INIT_TRACE_IRQFLAGS \
Ingo Molnarfbb9ce952006-07-03 00:24:50 -0700251 INIT_LOCKDEP \
Steven Rostedt5ac9f622009-03-25 20:55:00 -0400252 INIT_FTRACE_GRAPH \
Steven Rostedt261842b2009-04-16 21:41:52 -0400253 INIT_TRACE_RECURSION \
Paul E. McKenneyf41d9112009-08-22 13:56:52 -0700254 INIT_TASK_RCU_PREEMPT(tsk) \
Paul E. McKenney8315f422014-06-27 13:42:20 -0700255 INIT_TASK_RCU_TASKS(tsk) \
John Stultz1ca7d672013-10-07 15:51:59 -0700256 INIT_CPUSET_SEQ(tsk) \
Peter Zijlstrafb00aca2013-11-07 14:43:43 +0100257 INIT_RT_MUTEXES(tsk) \
Frederic Weisbecker6a616712012-12-16 20:00:34 +0100258 INIT_VTIME(tsk) \
Kirill Tkhaid8b163c2014-11-11 12:46:29 +0300259 INIT_NUMA_BALANCING(tsk) \
Andrey Ryabininc420f162015-02-13 14:39:59 -0800260 INIT_KASAN(tsk) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261}
262
263
264#define INIT_CPU_TIMERS(cpu_timers) \
265{ \
266 LIST_HEAD_INIT(cpu_timers[0]), \
267 LIST_HEAD_INIT(cpu_timers[1]), \
268 LIST_HEAD_INIT(cpu_timers[2]), \
269}
270
Tim Abbott857ecee2009-06-23 19:59:36 -0400271/* Attach to the init_task data structure for proper alignment */
Tim Abbott2af76872010-02-20 01:03:35 +0100272#define __init_task_data __attribute__((__section__(".data..init_task")))
Tim Abbott857ecee2009-06-23 19:59:36 -0400273
Linus Torvalds1da177e2005-04-16 15:20:36 -0700274
275#endif