Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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 <net/net_namespace.h>
14
15#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
22extern struct files_struct init_files;
23extern struct fs_struct init_fs;
24
25#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
33#define INIT_SIGNALS(sig) { \
34 .nr_threads = 1, \
35 .wait_chldexit = __WAIT_QUEUE_HEAD_INITIALIZER(sig.wait_chldexit),\
36 .shared_pending = { \
37 .list = LIST_HEAD_INIT(sig.shared_pending.list), \
38 .signal = {{0}}}, \
39 .posix_timers = LIST_HEAD_INIT(sig.posix_timers), \
40 .cpu_timers = INIT_CPU_TIMERS(sig.cpu_timers), \
41 .rlim = INIT_RLIMITS, \
42 .cputimer = { \
43 .cputime = INIT_CPUTIME, \
44 .running = 0, \
45 .lock = __SPIN_LOCK_UNLOCKED(sig.cputimer.lock), \
46 }, \
47 .cred_guard_mutex = \
48 __MUTEX_INITIALIZER(sig.cred_guard_mutex), \
49 INIT_THREADGROUP_FORK_LOCK(sig) \
50}
51
52extern struct nsproxy init_nsproxy;
53
54#define INIT_SIGHAND(sighand) { \
55 .count = ATOMIC_INIT(1), \
56 .action = { { { .sa_handler = SIG_DFL, } }, }, \
57 .siglock = __SPIN_LOCK_UNLOCKED(sighand.siglock), \
58 .signalfd_wqh = __WAIT_QUEUE_HEAD_INITIALIZER(sighand.signalfd_wqh), \
59}
60
61extern struct group_info init_groups;
62
63#define INIT_STRUCT_PID { \
64 .count = ATOMIC_INIT(1), \
65 .tasks = { \
66 { .first = NULL }, \
67 { .first = NULL }, \
68 { .first = NULL }, \
69 }, \
70 .level = 0, \
71 .numbers = { { \
72 .nr = 0, \
73 .ns = &init_pid_ns, \
74 .pid_chain = { .next = NULL, .pprev = NULL }, \
75 }, } \
76}
77
78#define INIT_PID_LINK(type) \
79{ \
80 .node = { \
81 .next = NULL, \
82 .pprev = NULL, \
83 }, \
84 .pid = &init_struct_pid, \
85}
86
87#ifdef CONFIG_AUDITSYSCALL
88#define INIT_IDS \
89 .loginuid = -1, \
90 .sessionid = -1,
91#else
92#define INIT_IDS
93#endif
94
95#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
101#ifdef CONFIG_TREE_PREEMPT_RCU
102#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
108#define INIT_TASK_RCU_PREEMPT(tsk) \
109 .rcu_read_lock_nesting = 0, \
110 .rcu_read_unlock_special = 0, \
111 .rcu_node_entry = LIST_HEAD_INIT(tsk.rcu_node_entry), \
112 INIT_TASK_RCU_TREE_PREEMPT() \
113 INIT_TASK_RCU_BOOST()
114#else
115#define INIT_TASK_RCU_PREEMPT(tsk)
116#endif
117
118extern struct cred init_cred;
119
120#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),
125#else
126# define INIT_PERF_EVENTS(tsk)
127#endif
128
129/*
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, \
136 .stack = &init_thread_info, \
137 .usage = ATOMIC_INIT(2), \
138 .flags = PF_KTHREAD, \
139 .prio = MAX_PRIO-20, \
140 .static_prio = MAX_PRIO-20, \
141 .normal_prio = MAX_PRIO-20, \
142 .policy = SCHED_NORMAL, \
143 .cpus_allowed = CPU_MASK_ALL, \
144 .mm = NULL, \
145 .active_mm = &init_mm, \
146 .se = { \
147 .group_node = LIST_HEAD_INIT(tsk.se.group_node), \
148 }, \
149 .rt = { \
150 .run_list = LIST_HEAD_INIT(tsk.rt.run_list), \
151 .time_slice = HZ, \
152 .nr_cpus_allowed = NR_CPUS, \
153 }, \
154 .tasks = LIST_HEAD_INIT(tsk.tasks), \
155 INIT_PUSHABLE_TASKS(tsk) \
156 .ptraced = LIST_HEAD_INIT(tsk.ptraced), \
157 .ptrace_entry = LIST_HEAD_INIT(tsk.ptrace_entry), \
158 .real_parent = &tsk, \
159 .parent = &tsk, \
160 .children = LIST_HEAD_INIT(tsk.children), \
161 .sibling = LIST_HEAD_INIT(tsk.sibling), \
162 .group_leader = &tsk, \
163 RCU_INIT_POINTER(.real_cred, &init_cred), \
164 RCU_INIT_POINTER(.cred, &init_cred), \
165 .comm = "swapper", \
166 .thread = INIT_THREAD, \
167 .fs = &init_fs, \
168 .files = &init_files, \
169 .signal = &init_signals, \
170 .sighand = &init_sighand, \
171 .nsproxy = &init_nsproxy, \
172 .pending = { \
173 .list = LIST_HEAD_INIT(tsk.pending.list), \
174 .signal = {{0}}}, \
175 .blocked = {{0}}, \
176 .alloc_lock = __SPIN_LOCK_UNLOCKED(tsk.alloc_lock), \
177 .journal_info = NULL, \
178 .cpu_timers = INIT_CPU_TIMERS(tsk.cpu_timers), \
179 .pi_lock = __RAW_SPIN_LOCK_UNLOCKED(tsk.pi_lock), \
180 .timer_slack_ns = 50000, /* 50 usec default slack */ \
181 .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 }, \
186 .thread_group = LIST_HEAD_INIT(tsk.thread_group), \
187 .dirties = INIT_PROP_LOCAL_SINGLE(dirties), \
188 INIT_IDS \
189 INIT_PERF_EVENTS(tsk) \
190 INIT_TRACE_IRQFLAGS \
191 INIT_LOCKDEP \
192 INIT_FTRACE_GRAPH \
193 INIT_TRACE_RECURSION \
194 INIT_TASK_RCU_PREEMPT(tsk) \
195}
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
205/* Attach to the init_task data structure for proper alignment */
206#define __init_task_data __attribute__((__section__(".data..init_task")))
207
208
209#endif