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