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