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_GROUP_RWSEM(sig) \
27 .group_rwsem = __RWSEM_INITIALIZER(sig.group_rwsem),
28#else
29#define INIT_GROUP_RWSEM(sig)
30#endif
31
32#ifdef CONFIG_CPUSETS
33#define INIT_CPUSET_SEQ \
34 .mems_allowed_seq = SEQCNT_ZERO,
35#else
36#define INIT_CPUSET_SEQ
37#endif
38
39#define INIT_SIGNALS(sig) { \
40 .nr_threads = 1, \
41 .wait_chldexit = __WAIT_QUEUE_HEAD_INITIALIZER(sig.wait_chldexit),\
42 .shared_pending = { \
43 .list = LIST_HEAD_INIT(sig.shared_pending.list), \
44 .signal = {{0}}}, \
45 .posix_timers = LIST_HEAD_INIT(sig.posix_timers), \
46 .cpu_timers = INIT_CPU_TIMERS(sig.cpu_timers), \
47 .rlim = INIT_RLIMITS, \
48 .cputimer = { \
49 .cputime = INIT_CPUTIME, \
50 .running = 0, \
51 .lock = __RAW_SPIN_LOCK_UNLOCKED(sig.cputimer.lock), \
52 }, \
53 .cred_guard_mutex = \
54 __MUTEX_INITIALIZER(sig.cred_guard_mutex), \
55 INIT_GROUP_RWSEM(sig) \
56}
57
58extern struct nsproxy init_nsproxy;
59
60#define INIT_SIGHAND(sighand) { \
61 .count = ATOMIC_INIT(1), \
62 .action = { { { .sa_handler = SIG_DFL, } }, }, \
63 .siglock = __SPIN_LOCK_UNLOCKED(sighand.siglock), \
64 .signalfd_wqh = __WAIT_QUEUE_HEAD_INITIALIZER(sighand.signalfd_wqh), \
65}
66
67extern struct group_info init_groups;
68
69#define INIT_STRUCT_PID { \
70 .count = ATOMIC_INIT(1), \
71 .tasks = { \
72 { .first = NULL }, \
73 { .first = NULL }, \
74 { .first = NULL }, \
75 }, \
76 .level = 0, \
77 .numbers = { { \
78 .nr = 0, \
79 .ns = &init_pid_ns, \
80 .pid_chain = { .next = NULL, .pprev = NULL }, \
81 }, } \
82}
83
84#define INIT_PID_LINK(type) \
85{ \
86 .node = { \
87 .next = NULL, \
88 .pprev = NULL, \
89 }, \
90 .pid = &init_struct_pid, \
91}
92
93#ifdef CONFIG_AUDITSYSCALL
94#define INIT_IDS \
95 .loginuid = -1, \
96 .sessionid = -1,
97#else
98#define INIT_IDS
99#endif
100
101#ifdef CONFIG_RCU_BOOST
102#define INIT_TASK_RCU_BOOST() \
103 .rcu_boost_mutex = NULL,
104#else
105#define INIT_TASK_RCU_BOOST()
106#endif
107#ifdef CONFIG_TREE_PREEMPT_RCU
108#define INIT_TASK_RCU_TREE_PREEMPT() \
109 .rcu_blocked_node = NULL,
110#else
111#define INIT_TASK_RCU_TREE_PREEMPT(tsk)
112#endif
113#ifdef CONFIG_PREEMPT_RCU
114#define INIT_TASK_RCU_PREEMPT(tsk) \
115 .rcu_read_lock_nesting = 0, \
116 .rcu_read_unlock_special = 0, \
117 .rcu_node_entry = LIST_HEAD_INIT(tsk.rcu_node_entry), \
118 INIT_TASK_RCU_TREE_PREEMPT() \
119 INIT_TASK_RCU_BOOST()
120#else
121#define INIT_TASK_RCU_PREEMPT(tsk)
122#endif
123
124extern struct cred init_cred;
125
126extern struct task_group root_task_group;
127
128#ifdef CONFIG_CGROUP_SCHED
129# define INIT_CGROUP_SCHED(tsk) \
130 .sched_task_group = &root_task_group,
131#else
132# define INIT_CGROUP_SCHED(tsk)
133#endif
134
135#ifdef CONFIG_PERF_EVENTS
136# define INIT_PERF_EVENTS(tsk) \
137 .perf_event_mutex = \
138 __MUTEX_INITIALIZER(tsk.perf_event_mutex), \
139 .perf_event_list = LIST_HEAD_INIT(tsk.perf_event_list),
140#else
141# define INIT_PERF_EVENTS(tsk)
142#endif
143
144#define INIT_TASK_COMM "swapper"
145
146/*
147 * INIT_TASK is used to set up the first task table, touch at
148 * your own risk!. Base=0, limit=0x1fffff (=2MB)
149 */
150#define INIT_TASK(tsk) \
151{ \
152 .state = 0, \
153 .stack = &init_thread_info, \
154 .usage = ATOMIC_INIT(2), \
155 .flags = PF_KTHREAD, \
156 .prio = MAX_PRIO-20, \
157 .static_prio = MAX_PRIO-20, \
158 .normal_prio = MAX_PRIO-20, \
159 .policy = SCHED_NORMAL, \
160 .cpus_allowed = CPU_MASK_ALL, \
161 .nr_cpus_allowed= NR_CPUS, \
162 .mm = NULL, \
163 .active_mm = &init_mm, \
164 .se = { \
165 .group_node = LIST_HEAD_INIT(tsk.se.group_node), \
166 }, \
167 .rt = { \
168 .run_list = LIST_HEAD_INIT(tsk.rt.run_list), \
169 .time_slice = RR_TIMESLICE, \
170 }, \
171 .tasks = LIST_HEAD_INIT(tsk.tasks), \
172 INIT_PUSHABLE_TASKS(tsk) \
173 INIT_CGROUP_SCHED(tsk) \
174 .ptraced = LIST_HEAD_INIT(tsk.ptraced), \
175 .ptrace_entry = LIST_HEAD_INIT(tsk.ptrace_entry), \
176 .real_parent = &tsk, \
177 .parent = &tsk, \
178 .children = LIST_HEAD_INIT(tsk.children), \
179 .sibling = LIST_HEAD_INIT(tsk.sibling), \
180 .group_leader = &tsk, \
181 RCU_POINTER_INITIALIZER(real_cred, &init_cred), \
182 RCU_POINTER_INITIALIZER(cred, &init_cred), \
183 .comm = INIT_TASK_COMM, \
184 .thread = INIT_THREAD, \
185 .fs = &init_fs, \
186 .files = &init_files, \
187 .signal = &init_signals, \
188 .sighand = &init_sighand, \
189 .nsproxy = &init_nsproxy, \
190 .pending = { \
191 .list = LIST_HEAD_INIT(tsk.pending.list), \
192 .signal = {{0}}}, \
193 .blocked = {{0}}, \
194 .alloc_lock = __SPIN_LOCK_UNLOCKED(tsk.alloc_lock), \
195 .journal_info = NULL, \
196 .cpu_timers = INIT_CPU_TIMERS(tsk.cpu_timers), \
197 .pi_lock = __RAW_SPIN_LOCK_UNLOCKED(tsk.pi_lock), \
198 .timer_slack_ns = 50000, /* 50 usec default slack */ \
199 .pids = { \
200 [PIDTYPE_PID] = INIT_PID_LINK(PIDTYPE_PID), \
201 [PIDTYPE_PGID] = INIT_PID_LINK(PIDTYPE_PGID), \
202 [PIDTYPE_SID] = INIT_PID_LINK(PIDTYPE_SID), \
203 }, \
204 .thread_group = LIST_HEAD_INIT(tsk.thread_group), \
205 INIT_IDS \
206 INIT_PERF_EVENTS(tsk) \
207 INIT_TRACE_IRQFLAGS \
208 INIT_LOCKDEP \
209 INIT_FTRACE_GRAPH \
210 INIT_TRACE_RECURSION \
211 INIT_TASK_RCU_PREEMPT(tsk) \
212 INIT_CPUSET_SEQ \
213}
214
215
216#define INIT_CPU_TIMERS(cpu_timers) \
217{ \
218 LIST_HEAD_INIT(cpu_timers[0]), \
219 LIST_HEAD_INIT(cpu_timers[1]), \
220 LIST_HEAD_INIT(cpu_timers[2]), \
221}
222
223/* Attach to the init_task data structure for proper alignment */
224#define __init_task_data __attribute__((__section__(".data..init_task")))
225
226
227#endif