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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>
Eric W. Biederman772698f2007-09-12 11:55:17 +020013#include <net/net_namespace.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070014
Dario Faggioli806c09a2010-11-30 19:51:33 +010015#ifdef CONFIG_SMP
16# define INIT_PUSHABLE_TASKS(tsk) \
17 .pushable_tasks = PLIST_NODE_INIT(tsk.pushable_tasks, MAX_PRIO),
18#else
19# define INIT_PUSHABLE_TASKS(tsk)
20#endif
21
Al Virof52111b2008-05-08 18:19:16 -040022extern struct files_struct init_files;
Al Viro18d8fda2008-12-26 00:35:37 -050023extern struct fs_struct init_fs;
Linus Torvalds1da177e2005-04-16 15:20:36 -070024
Ben Blum4714d1d2011-05-26 16:25:18 -070025#ifdef CONFIG_CGROUPS
26#define INIT_THREADGROUP_FORK_LOCK(sig) \
27 .threadgroup_fork_lock = \
28 __RWSEM_INITIALIZER(sig.threadgroup_fork_lock),
29#else
30#define INIT_THREADGROUP_FORK_LOCK(sig)
31#endif
32
Cedric Le Goater1ec320a2006-12-08 02:37:55 -080033#define INIT_SIGNALS(sig) { \
Oleg Nesterovb3ac0222010-05-26 14:43:24 -070034 .nr_threads = 1, \
Linus Torvalds1da177e2005-04-16 15:20:36 -070035 .wait_chldexit = __WAIT_QUEUE_HEAD_INITIALIZER(sig.wait_chldexit),\
Cedric Le Goater1ec320a2006-12-08 02:37:55 -080036 .shared_pending = { \
Linus Torvalds1da177e2005-04-16 15:20:36 -070037 .list = LIST_HEAD_INIT(sig.shared_pending.list), \
Cedric Le Goater1ec320a2006-12-08 02:37:55 -080038 .signal = {{0}}}, \
Linus Torvalds1da177e2005-04-16 15:20:36 -070039 .posix_timers = LIST_HEAD_INIT(sig.posix_timers), \
40 .cpu_timers = INIT_CPU_TIMERS(sig.cpu_timers), \
41 .rlim = INIT_RLIMITS, \
Peter Zijlstra4cd4c1b2009-02-05 12:24:16 +010042 .cputimer = { \
43 .cputime = INIT_CPUTIME, \
44 .running = 0, \
45 .lock = __SPIN_LOCK_UNLOCKED(sig.cputimer.lock), \
46 }, \
KOSAKI Motohiro9b1bf122010-10-27 15:34:08 -070047 .cred_guard_mutex = \
48 __MUTEX_INITIALIZER(sig.cred_guard_mutex), \
Ben Blum4714d1d2011-05-26 16:25:18 -070049 INIT_THREADGROUP_FORK_LOCK(sig) \
Linus Torvalds1da177e2005-04-16 15:20:36 -070050}
51
Serge E. Hallynab516012006-10-02 02:18:06 -070052extern struct nsproxy init_nsproxy;
Serge E. Hallynab516012006-10-02 02:18:06 -070053
Linus Torvalds1da177e2005-04-16 15:20:36 -070054#define INIT_SIGHAND(sighand) { \
55 .count = ATOMIC_INIT(1), \
Oleg Nesterov0a14a132010-05-26 14:44:12 -070056 .action = { { { .sa_handler = SIG_DFL, } }, }, \
Ingo Molnare4d91912006-07-03 00:24:34 -070057 .siglock = __SPIN_LOCK_UNLOCKED(sighand.siglock), \
Davide Libenzib8fceee2007-09-20 12:40:16 -070058 .signalfd_wqh = __WAIT_QUEUE_HEAD_INITIALIZER(sighand.signalfd_wqh), \
Linus Torvalds1da177e2005-04-16 15:20:36 -070059}
60
61extern struct group_info init_groups;
62
Sukadev Bhattiprolu820e45d2007-05-10 22:23:00 -070063#define INIT_STRUCT_PID { \
64 .count = ATOMIC_INIT(1), \
Sukadev Bhattiprolu820e45d2007-05-10 22:23:00 -070065 .tasks = { \
Oleg Nesterovf2001142010-05-26 14:44:10 -070066 { .first = NULL }, \
67 { .first = NULL }, \
68 { .first = NULL }, \
Sukadev Bhattiprolu820e45d2007-05-10 22:23:00 -070069 }, \
Sukadev Bhattiprolu4c3f2ea2007-10-18 23:40:03 -070070 .level = 0, \
71 .numbers = { { \
72 .nr = 0, \
73 .ns = &init_pid_ns, \
74 .pid_chain = { .next = NULL, .pprev = NULL }, \
75 }, } \
Sukadev Bhattiprolu820e45d2007-05-10 22:23:00 -070076}
77
78#define INIT_PID_LINK(type) \
79{ \
80 .node = { \
81 .next = NULL, \
Oleg Nesterovf2001142010-05-26 14:44:10 -070082 .pprev = NULL, \
Sukadev Bhattiprolu820e45d2007-05-10 22:23:00 -070083 }, \
84 .pid = &init_struct_pid, \
85}
86
Al Virobfef93a2008-01-10 04:53:18 -050087#ifdef CONFIG_AUDITSYSCALL
88#define INIT_IDS \
Eric Paris4746ec52008-01-08 10:06:53 -050089 .loginuid = -1, \
90 .sessionid = -1,
Al Virobfef93a2008-01-10 04:53:18 -050091#else
92#define INIT_IDS
93#endif
Serge E. Hallyn3b7391d2008-02-04 22:29:45 -080094
Paul E. McKenney24278d12010-09-27 17:25:23 -070095#ifdef CONFIG_RCU_BOOST
96#define INIT_TASK_RCU_BOOST() \
97 .rcu_boost_mutex = NULL,
98#else
99#define INIT_TASK_RCU_BOOST()
100#endif
Paul E. McKenney6b3ef482009-08-22 13:56:53 -0700101#ifdef CONFIG_TREE_PREEMPT_RCU
Paul E. McKenneya57eb942010-06-29 16:49:16 -0700102#define INIT_TASK_RCU_TREE_PREEMPT() \
103 .rcu_blocked_node = NULL,
104#else
105#define INIT_TASK_RCU_TREE_PREEMPT(tsk)
106#endif
107#ifdef CONFIG_PREEMPT_RCU
Paul E. McKenneyf41d9112009-08-22 13:56:52 -0700108#define INIT_TASK_RCU_PREEMPT(tsk) \
109 .rcu_read_lock_nesting = 0, \
110 .rcu_read_unlock_special = 0, \
Paul E. McKenneya57eb942010-06-29 16:49:16 -0700111 .rcu_node_entry = LIST_HEAD_INIT(tsk.rcu_node_entry), \
Paul E. McKenney24278d12010-09-27 17:25:23 -0700112 INIT_TASK_RCU_TREE_PREEMPT() \
113 INIT_TASK_RCU_BOOST()
Paul E. McKenneyf41d9112009-08-22 13:56:52 -0700114#else
115#define INIT_TASK_RCU_PREEMPT(tsk)
116#endif
117
David Howellsb6dff3e2008-11-14 10:39:16 +1100118extern struct cred init_cred;
119
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200120#ifdef CONFIG_PERF_EVENTS
121# define INIT_PERF_EVENTS(tsk) \
122 .perf_event_mutex = \
123 __MUTEX_INITIALIZER(tsk.perf_event_mutex), \
124 .perf_event_list = LIST_HEAD_INIT(tsk.perf_event_list),
Peter Zijlstra082ff5a2009-05-23 18:29:00 +0200125#else
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200126# define INIT_PERF_EVENTS(tsk)
Peter Zijlstra082ff5a2009-05-23 18:29:00 +0200127#endif
128
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129/*
130 * INIT_TASK is used to set up the first task table, touch at
131 * your own risk!. Base=0, limit=0x1fffff (=2MB)
132 */
133#define INIT_TASK(tsk) \
134{ \
135 .state = 0, \
Roman Zippelf7e42172007-05-09 02:35:17 -0700136 .stack = &init_thread_info, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137 .usage = ATOMIC_INIT(2), \
Oleg Nesterov7b34e422008-07-25 01:47:37 -0700138 .flags = PF_KTHREAD, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139 .prio = MAX_PRIO-20, \
140 .static_prio = MAX_PRIO-20, \
Ingo Molnarb29739f2006-06-27 02:54:51 -0700141 .normal_prio = MAX_PRIO-20, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700142 .policy = SCHED_NORMAL, \
143 .cpus_allowed = CPU_MASK_ALL, \
144 .mm = NULL, \
145 .active_mm = &init_mm, \
Peter Zijlstra4a55bd52008-04-19 19:45:00 +0200146 .se = { \
147 .group_node = LIST_HEAD_INIT(tsk.se.group_node), \
148 }, \
Peter Zijlstrafa717062008-01-25 21:08:27 +0100149 .rt = { \
150 .run_list = LIST_HEAD_INIT(tsk.rt.run_list), \
Peter Zijlstra6f505b12008-01-25 21:08:30 +0100151 .time_slice = HZ, \
152 .nr_cpus_allowed = NR_CPUS, \
153 }, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154 .tasks = LIST_HEAD_INIT(tsk.tasks), \
Dario Faggioli806c09a2010-11-30 19:51:33 +0100155 INIT_PUSHABLE_TASKS(tsk) \
Roland McGrathf4700212008-03-24 18:36:23 -0700156 .ptraced = LIST_HEAD_INIT(tsk.ptraced), \
157 .ptrace_entry = LIST_HEAD_INIT(tsk.ptrace_entry), \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158 .real_parent = &tsk, \
159 .parent = &tsk, \
160 .children = LIST_HEAD_INIT(tsk.children), \
161 .sibling = LIST_HEAD_INIT(tsk.sibling), \
162 .group_leader = &tsk, \
Arnd Bergmann4d2deb42010-02-24 20:01:56 +0100163 RCU_INIT_POINTER(.real_cred, &init_cred), \
164 RCU_INIT_POINTER(.cred, &init_cred), \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165 .comm = "swapper", \
166 .thread = INIT_THREAD, \
167 .fs = &init_fs, \
168 .files = &init_files, \
169 .signal = &init_signals, \
170 .sighand = &init_sighand, \
Serge E. Hallynab516012006-10-02 02:18:06 -0700171 .nsproxy = &init_nsproxy, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172 .pending = { \
173 .list = LIST_HEAD_INIT(tsk.pending.list), \
174 .signal = {{0}}}, \
175 .blocked = {{0}}, \
Ingo Molnare4d91912006-07-03 00:24:34 -0700176 .alloc_lock = __SPIN_LOCK_UNLOCKED(tsk.alloc_lock), \
Linus Torvaldsb6e32242009-12-17 13:23:24 -0800177 .journal_info = NULL, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178 .cpu_timers = INIT_CPU_TIMERS(tsk.cpu_timers), \
Thomas Gleixner1d615482009-11-17 14:54:03 +0100179 .pi_lock = __RAW_SPIN_LOCK_UNLOCKED(tsk.pi_lock), \
Arjan van de Ven69766752008-09-01 15:52:40 -0700180 .timer_slack_ns = 50000, /* 50 usec default slack */ \
Sukadev Bhattiprolu820e45d2007-05-10 22:23:00 -0700181 .pids = { \
182 [PIDTYPE_PID] = INIT_PID_LINK(PIDTYPE_PID), \
183 [PIDTYPE_PGID] = INIT_PID_LINK(PIDTYPE_PGID), \
184 [PIDTYPE_SID] = INIT_PID_LINK(PIDTYPE_SID), \
185 }, \
Oleg Nesterovfa2755e2010-05-26 14:44:08 -0700186 .thread_group = LIST_HEAD_INIT(tsk.thread_group), \
Peter Zijlstra3e26c142007-10-16 23:25:50 -0700187 .dirties = INIT_PROP_LOCAL_SINGLE(dirties), \
Al Virobfef93a2008-01-10 04:53:18 -0500188 INIT_IDS \
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200189 INIT_PERF_EVENTS(tsk) \
Ingo Molnarde30a2b2006-07-03 00:24:42 -0700190 INIT_TRACE_IRQFLAGS \
Ingo Molnarfbb9ce952006-07-03 00:24:50 -0700191 INIT_LOCKDEP \
Steven Rostedt5ac9f622009-03-25 20:55:00 -0400192 INIT_FTRACE_GRAPH \
Steven Rostedt261842b2009-04-16 21:41:52 -0400193 INIT_TRACE_RECURSION \
Paul E. McKenneyf41d9112009-08-22 13:56:52 -0700194 INIT_TASK_RCU_PREEMPT(tsk) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195}
196
197
198#define INIT_CPU_TIMERS(cpu_timers) \
199{ \
200 LIST_HEAD_INIT(cpu_timers[0]), \
201 LIST_HEAD_INIT(cpu_timers[1]), \
202 LIST_HEAD_INIT(cpu_timers[2]), \
203}
204
Tim Abbott857ecee2009-06-23 19:59:36 -0400205/* Attach to the init_task data structure for proper alignment */
Tim Abbott2af76872010-02-20 01:03:35 +0100206#define __init_task_data __attribute__((__section__(".data..init_task")))
Tim Abbott857ecee2009-06-23 19:59:36 -0400207
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208
209#endif