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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
Mel Gormancc9a6c82012-03-21 16:34:11 -070028#ifdef CONFIG_CPUSETS
John Stultz1ca7d672013-10-07 15:51:59 -070029#define INIT_CPUSET_SEQ(tsk) \
30 .mems_allowed_seq = SEQCNT_ZERO(tsk.mems_allowed_seq),
Mel Gormancc9a6c82012-03-21 16:34:11 -070031#else
John Stultz1ca7d672013-10-07 15:51:59 -070032#define INIT_CPUSET_SEQ(tsk)
Mel Gormancc9a6c82012-03-21 16:34:11 -070033#endif
34
Peter Zijlstra9d7fb042015-06-30 11:30:54 +020035#ifndef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
36#define INIT_PREV_CPUTIME(x) .prev_cputime = { \
37 .lock = __RAW_SPIN_LOCK_UNLOCKED(x.prev_cputime.lock), \
38},
39#else
40#define INIT_PREV_CPUTIME(x)
41#endif
42
Cedric Le Goater1ec320a2006-12-08 02:37:55 -080043#define INIT_SIGNALS(sig) { \
Oleg Nesterovb3ac0222010-05-26 14:43:24 -070044 .nr_threads = 1, \
Oleg Nesterov0c740d02014-01-21 15:49:56 -080045 .thread_head = LIST_HEAD_INIT(init_task.thread_node), \
Linus Torvalds1da177e2005-04-16 15:20:36 -070046 .wait_chldexit = __WAIT_QUEUE_HEAD_INITIALIZER(sig.wait_chldexit),\
Cedric Le Goater1ec320a2006-12-08 02:37:55 -080047 .shared_pending = { \
Linus Torvalds1da177e2005-04-16 15:20:36 -070048 .list = LIST_HEAD_INIT(sig.shared_pending.list), \
Cedric Le Goater1ec320a2006-12-08 02:37:55 -080049 .signal = {{0}}}, \
Linus Torvalds1da177e2005-04-16 15:20:36 -070050 .posix_timers = LIST_HEAD_INIT(sig.posix_timers), \
51 .cpu_timers = INIT_CPU_TIMERS(sig.cpu_timers), \
52 .rlim = INIT_RLIMITS, \
Peter Zijlstra4cd4c1b2009-02-05 12:24:16 +010053 .cputimer = { \
Jason Low71107442015-04-28 13:00:24 -070054 .cputime_atomic = INIT_CPUTIME_ATOMIC, \
Jason Lowd5c373e2015-10-14 12:07:55 -070055 .running = false, \
Jason Lowc8d75aa2015-10-14 12:07:56 -070056 .checking_timer = false, \
Peter Zijlstra4cd4c1b2009-02-05 12:24:16 +010057 }, \
Peter Zijlstra9d7fb042015-06-30 11:30:54 +020058 INIT_PREV_CPUTIME(sig) \
KOSAKI Motohiro9b1bf122010-10-27 15:34:08 -070059 .cred_guard_mutex = \
60 __MUTEX_INITIALIZER(sig.cred_guard_mutex), \
Linus Torvalds1da177e2005-04-16 15:20:36 -070061}
62
Serge E. Hallynab516012006-10-02 02:18:06 -070063extern struct nsproxy init_nsproxy;
Serge E. Hallynab516012006-10-02 02:18:06 -070064
Linus Torvalds1da177e2005-04-16 15:20:36 -070065#define INIT_SIGHAND(sighand) { \
66 .count = ATOMIC_INIT(1), \
Oleg Nesterov0a14a132010-05-26 14:44:12 -070067 .action = { { { .sa_handler = SIG_DFL, } }, }, \
Ingo Molnare4d91912006-07-03 00:24:34 -070068 .siglock = __SPIN_LOCK_UNLOCKED(sighand.siglock), \
Davide Libenzib8fceee2007-09-20 12:40:16 -070069 .signalfd_wqh = __WAIT_QUEUE_HEAD_INITIALIZER(sighand.signalfd_wqh), \
Linus Torvalds1da177e2005-04-16 15:20:36 -070070}
71
72extern struct group_info init_groups;
73
Sukadev Bhattiprolu820e45d2007-05-10 22:23:00 -070074#define INIT_STRUCT_PID { \
75 .count = ATOMIC_INIT(1), \
Sukadev Bhattiprolu820e45d2007-05-10 22:23:00 -070076 .tasks = { \
Oleg Nesterovf2001142010-05-26 14:44:10 -070077 { .first = NULL }, \
78 { .first = NULL }, \
79 { .first = NULL }, \
Sukadev Bhattiprolu820e45d2007-05-10 22:23:00 -070080 }, \
Sukadev Bhattiprolu4c3f2ea2007-10-18 23:40:03 -070081 .level = 0, \
82 .numbers = { { \
83 .nr = 0, \
84 .ns = &init_pid_ns, \
85 .pid_chain = { .next = NULL, .pprev = NULL }, \
86 }, } \
Sukadev Bhattiprolu820e45d2007-05-10 22:23:00 -070087}
88
89#define INIT_PID_LINK(type) \
90{ \
91 .node = { \
92 .next = NULL, \
Oleg Nesterovf2001142010-05-26 14:44:10 -070093 .pprev = NULL, \
Sukadev Bhattiprolu820e45d2007-05-10 22:23:00 -070094 }, \
95 .pid = &init_struct_pid, \
96}
97
Al Virobfef93a2008-01-10 04:53:18 -050098#ifdef CONFIG_AUDITSYSCALL
99#define INIT_IDS \
Eric W. Biedermane1760bd2012-09-10 22:39:43 -0700100 .loginuid = INVALID_UID, \
Eric Paris4440e852013-11-27 17:35:17 -0500101 .sessionid = (unsigned int)-1,
Al Virobfef93a2008-01-10 04:53:18 -0500102#else
103#define INIT_IDS
104#endif
Serge E. Hallyn3b7391d2008-02-04 22:29:45 -0800105
Pranith Kumar28f65692014-09-22 14:00:48 -0400106#ifdef CONFIG_PREEMPT_RCU
Paul E. McKenneya57eb942010-06-29 16:49:16 -0700107#define INIT_TASK_RCU_TREE_PREEMPT() \
108 .rcu_blocked_node = NULL,
109#else
110#define INIT_TASK_RCU_TREE_PREEMPT(tsk)
111#endif
112#ifdef CONFIG_PREEMPT_RCU
Paul E. McKenneyf41d9112009-08-22 13:56:52 -0700113#define INIT_TASK_RCU_PREEMPT(tsk) \
114 .rcu_read_lock_nesting = 0, \
Paul E. McKenney1d082fd2014-08-14 16:01:53 -0700115 .rcu_read_unlock_special.s = 0, \
Paul E. McKenneya57eb942010-06-29 16:49:16 -0700116 .rcu_node_entry = LIST_HEAD_INIT(tsk.rcu_node_entry), \
Paul E. McKenneyabaa93d2014-06-12 13:30:25 -0700117 INIT_TASK_RCU_TREE_PREEMPT()
Paul E. McKenneyf41d9112009-08-22 13:56:52 -0700118#else
119#define INIT_TASK_RCU_PREEMPT(tsk)
120#endif
Paul E. McKenney8315f422014-06-27 13:42:20 -0700121#ifdef CONFIG_TASKS_RCU
122#define INIT_TASK_RCU_TASKS(tsk) \
123 .rcu_tasks_holdout = false, \
124 .rcu_tasks_holdout_list = \
Paul E. McKenney176f8f72014-08-04 17:43:50 -0700125 LIST_HEAD_INIT(tsk.rcu_tasks_holdout_list), \
126 .rcu_tasks_idle_cpu = -1,
Paul E. McKenney8315f422014-06-27 13:42:20 -0700127#else
128#define INIT_TASK_RCU_TASKS(tsk)
129#endif
Paul E. McKenneyf41d9112009-08-22 13:56:52 -0700130
David Howellsb6dff3e2008-11-14 10:39:16 +1100131extern struct cred init_cred;
132
Peter Zijlstra8323f262012-06-22 13:36:05 +0200133extern struct task_group root_task_group;
134
135#ifdef CONFIG_CGROUP_SCHED
136# define INIT_CGROUP_SCHED(tsk) \
137 .sched_task_group = &root_task_group,
138#else
139# define INIT_CGROUP_SCHED(tsk)
140#endif
141
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200142#ifdef CONFIG_PERF_EVENTS
Peter Zijlstra8323f262012-06-22 13:36:05 +0200143# define INIT_PERF_EVENTS(tsk) \
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200144 .perf_event_mutex = \
145 __MUTEX_INITIALIZER(tsk.perf_event_mutex), \
146 .perf_event_list = LIST_HEAD_INIT(tsk.perf_event_list),
Peter Zijlstra082ff5a2009-05-23 18:29:00 +0200147#else
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200148# define INIT_PERF_EVENTS(tsk)
Peter Zijlstra082ff5a2009-05-23 18:29:00 +0200149#endif
150
Frederic Weisbecker6a616712012-12-16 20:00:34 +0100151#ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN
152# define INIT_VTIME(tsk) \
153 .vtime_seqlock = __SEQLOCK_UNLOCKED(tsk.vtime_seqlock), \
154 .vtime_snap = 0, \
155 .vtime_snap_whence = VTIME_SYS,
156#else
157# define INIT_VTIME(tsk)
158#endif
159
Carsten Emdef1c6f1a2011-10-26 23:14:16 +0200160#define INIT_TASK_COMM "swapper"
161
Peter Zijlstrafb00aca2013-11-07 14:43:43 +0100162#ifdef CONFIG_RT_MUTEXES
163# define INIT_RT_MUTEXES(tsk) \
164 .pi_waiters = RB_ROOT, \
165 .pi_waiters_leftmost = NULL,
166#else
167# define INIT_RT_MUTEXES(tsk)
168#endif
169
Kirill Tkhaid8b163c2014-11-11 12:46:29 +0300170#ifdef CONFIG_NUMA_BALANCING
171# define INIT_NUMA_BALANCING(tsk) \
172 .numa_preferred_nid = -1, \
173 .numa_group = NULL, \
174 .numa_faults = NULL,
175#else
176# define INIT_NUMA_BALANCING(tsk)
177#endif
178
Andrey Ryabininc420f162015-02-13 14:39:59 -0800179#ifdef CONFIG_KASAN
180# define INIT_KASAN(tsk) \
181 .kasan_depth = 1,
182#else
183# define INIT_KASAN(tsk)
184#endif
185
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186/*
187 * INIT_TASK is used to set up the first task table, touch at
188 * your own risk!. Base=0, limit=0x1fffff (=2MB)
189 */
190#define INIT_TASK(tsk) \
191{ \
192 .state = 0, \
Roman Zippelf7e42172007-05-09 02:35:17 -0700193 .stack = &init_thread_info, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194 .usage = ATOMIC_INIT(2), \
Oleg Nesterov7b34e422008-07-25 01:47:37 -0700195 .flags = PF_KTHREAD, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700196 .prio = MAX_PRIO-20, \
197 .static_prio = MAX_PRIO-20, \
Ingo Molnarb29739f2006-06-27 02:54:51 -0700198 .normal_prio = MAX_PRIO-20, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199 .policy = SCHED_NORMAL, \
200 .cpus_allowed = CPU_MASK_ALL, \
Peter Zijlstra29baa742012-04-23 12:11:21 +0200201 .nr_cpus_allowed= NR_CPUS, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202 .mm = NULL, \
203 .active_mm = &init_mm, \
Andy Lutomirskif56141e2015-02-12 15:01:14 -0800204 .restart_block = { \
205 .fn = do_no_restart_syscall, \
206 }, \
Peter Zijlstra4a55bd52008-04-19 19:45:00 +0200207 .se = { \
208 .group_node = LIST_HEAD_INIT(tsk.se.group_node), \
209 }, \
Peter Zijlstrafa717062008-01-25 21:08:27 +0100210 .rt = { \
211 .run_list = LIST_HEAD_INIT(tsk.rt.run_list), \
Hiroshi Shimamotode5bdff2012-02-16 14:52:21 +0900212 .time_slice = RR_TIMESLICE, \
Peter Zijlstra6f505b12008-01-25 21:08:30 +0100213 }, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214 .tasks = LIST_HEAD_INIT(tsk.tasks), \
Dario Faggioli806c09a2010-11-30 19:51:33 +0100215 INIT_PUSHABLE_TASKS(tsk) \
Peter Zijlstra8323f262012-06-22 13:36:05 +0200216 INIT_CGROUP_SCHED(tsk) \
Roland McGrathf4700212008-03-24 18:36:23 -0700217 .ptraced = LIST_HEAD_INIT(tsk.ptraced), \
218 .ptrace_entry = LIST_HEAD_INIT(tsk.ptrace_entry), \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219 .real_parent = &tsk, \
220 .parent = &tsk, \
221 .children = LIST_HEAD_INIT(tsk.children), \
222 .sibling = LIST_HEAD_INIT(tsk.sibling), \
223 .group_leader = &tsk, \
Paul E. McKenneyd36cc702012-05-16 15:33:15 -0700224 RCU_POINTER_INITIALIZER(real_cred, &init_cred), \
225 RCU_POINTER_INITIALIZER(cred, &init_cred), \
Carsten Emdef1c6f1a2011-10-26 23:14:16 +0200226 .comm = INIT_TASK_COMM, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227 .thread = INIT_THREAD, \
228 .fs = &init_fs, \
229 .files = &init_files, \
230 .signal = &init_signals, \
231 .sighand = &init_sighand, \
Serge E. Hallynab516012006-10-02 02:18:06 -0700232 .nsproxy = &init_nsproxy, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233 .pending = { \
234 .list = LIST_HEAD_INIT(tsk.pending.list), \
235 .signal = {{0}}}, \
236 .blocked = {{0}}, \
Ingo Molnare4d91912006-07-03 00:24:34 -0700237 .alloc_lock = __SPIN_LOCK_UNLOCKED(tsk.alloc_lock), \
Linus Torvaldsb6e32242009-12-17 13:23:24 -0800238 .journal_info = NULL, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239 .cpu_timers = INIT_CPU_TIMERS(tsk.cpu_timers), \
Thomas Gleixner1d615482009-11-17 14:54:03 +0100240 .pi_lock = __RAW_SPIN_LOCK_UNLOCKED(tsk.pi_lock), \
Arjan van de Ven69766752008-09-01 15:52:40 -0700241 .timer_slack_ns = 50000, /* 50 usec default slack */ \
Sukadev Bhattiprolu820e45d2007-05-10 22:23:00 -0700242 .pids = { \
243 [PIDTYPE_PID] = INIT_PID_LINK(PIDTYPE_PID), \
244 [PIDTYPE_PGID] = INIT_PID_LINK(PIDTYPE_PGID), \
245 [PIDTYPE_SID] = INIT_PID_LINK(PIDTYPE_SID), \
246 }, \
Oleg Nesterovfa2755e2010-05-26 14:44:08 -0700247 .thread_group = LIST_HEAD_INIT(tsk.thread_group), \
Oleg Nesterov0c740d02014-01-21 15:49:56 -0800248 .thread_node = LIST_HEAD_INIT(init_signals.thread_head), \
Al Virobfef93a2008-01-10 04:53:18 -0500249 INIT_IDS \
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200250 INIT_PERF_EVENTS(tsk) \
Ingo Molnarde30a2b2006-07-03 00:24:42 -0700251 INIT_TRACE_IRQFLAGS \
Ingo Molnarfbb9ce952006-07-03 00:24:50 -0700252 INIT_LOCKDEP \
Steven Rostedt5ac9f622009-03-25 20:55:00 -0400253 INIT_FTRACE_GRAPH \
Steven Rostedt261842b2009-04-16 21:41:52 -0400254 INIT_TRACE_RECURSION \
Paul E. McKenneyf41d9112009-08-22 13:56:52 -0700255 INIT_TASK_RCU_PREEMPT(tsk) \
Paul E. McKenney8315f422014-06-27 13:42:20 -0700256 INIT_TASK_RCU_TASKS(tsk) \
John Stultz1ca7d672013-10-07 15:51:59 -0700257 INIT_CPUSET_SEQ(tsk) \
Peter Zijlstrafb00aca2013-11-07 14:43:43 +0100258 INIT_RT_MUTEXES(tsk) \
Peter Zijlstra9d7fb042015-06-30 11:30:54 +0200259 INIT_PREV_CPUTIME(tsk) \
Frederic Weisbecker6a616712012-12-16 20:00:34 +0100260 INIT_VTIME(tsk) \
Kirill Tkhaid8b163c2014-11-11 12:46:29 +0300261 INIT_NUMA_BALANCING(tsk) \
Andrey Ryabininc420f162015-02-13 14:39:59 -0800262 INIT_KASAN(tsk) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263}
264
265
266#define INIT_CPU_TIMERS(cpu_timers) \
267{ \
268 LIST_HEAD_INIT(cpu_timers[0]), \
269 LIST_HEAD_INIT(cpu_timers[1]), \
270 LIST_HEAD_INIT(cpu_timers[2]), \
271}
272
Tim Abbott857ecee2009-06-23 19:59:36 -0400273/* Attach to the init_task data structure for proper alignment */
Tim Abbott2af76872010-02-20 01:03:35 +0100274#define __init_task_data __attribute__((__section__(".data..init_task")))
Tim Abbott857ecee2009-06-23 19:59:36 -0400275
Linus Torvalds1da177e2005-04-16 15:20:36 -0700276
277#endif