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
15extern struct files_struct init_files;
16extern struct fs_struct init_fs;
17
18#define INIT_SIGNALS(sig) { \
19 .nr_threads = 1, \
20 .wait_chldexit = __WAIT_QUEUE_HEAD_INITIALIZER(sig.wait_chldexit),\
21 .shared_pending = { \
22 .list = LIST_HEAD_INIT(sig.shared_pending.list), \
23 .signal = {{0}}}, \
24 .posix_timers = LIST_HEAD_INIT(sig.posix_timers), \
25 .cpu_timers = INIT_CPU_TIMERS(sig.cpu_timers), \
26 .rlim = INIT_RLIMITS, \
27 .cputimer = { \
28 .cputime = INIT_CPUTIME, \
29 .running = 0, \
30 .lock = __SPIN_LOCK_UNLOCKED(sig.cputimer.lock), \
31 }, \
32 .cred_guard_mutex = \
33 __MUTEX_INITIALIZER(sig.cred_guard_mutex), \
34}
35
36extern struct nsproxy init_nsproxy;
37
38#define INIT_SIGHAND(sighand) { \
39 .count = ATOMIC_INIT(1), \
40 .action = { { { .sa_handler = SIG_DFL, } }, }, \
41 .siglock = __SPIN_LOCK_UNLOCKED(sighand.siglock), \
42 .signalfd_wqh = __WAIT_QUEUE_HEAD_INITIALIZER(sighand.signalfd_wqh), \
43}
44
45extern struct group_info init_groups;
46
47#define INIT_STRUCT_PID { \
48 .count = ATOMIC_INIT(1), \
49 .tasks = { \
50 { .first = NULL }, \
51 { .first = NULL }, \
52 { .first = NULL }, \
53 }, \
54 .level = 0, \
55 .numbers = { { \
56 .nr = 0, \
57 .ns = &init_pid_ns, \
58 .pid_chain = { .next = NULL, .pprev = NULL }, \
59 }, } \
60}
61
62#define INIT_PID_LINK(type) \
63{ \
64 .node = { \
65 .next = NULL, \
66 .pprev = NULL, \
67 }, \
68 .pid = &init_struct_pid, \
69}
70
71#ifdef CONFIG_AUDITSYSCALL
72#define INIT_IDS \
73 .loginuid = -1, \
74 .sessionid = -1,
75#else
76#define INIT_IDS
77#endif
78
79/*
80 * Because of the reduced scope of CAP_SETPCAP when filesystem
81 * capabilities are in effect, it is safe to allow CAP_SETPCAP to
82 * be available in the default configuration.
83 */
84# define CAP_INIT_BSET CAP_FULL_SET
85
86#ifdef CONFIG_TREE_PREEMPT_RCU
87#define INIT_TASK_RCU_TREE_PREEMPT() \
88 .rcu_blocked_node = NULL,
89#else
90#define INIT_TASK_RCU_TREE_PREEMPT(tsk)
91#endif
92#ifdef CONFIG_PREEMPT_RCU
93#define INIT_TASK_RCU_PREEMPT(tsk) \
94 .rcu_read_lock_nesting = 0, \
95 .rcu_read_unlock_special = 0, \
96 .rcu_node_entry = LIST_HEAD_INIT(tsk.rcu_node_entry), \
97 INIT_TASK_RCU_TREE_PREEMPT()
98#else
99#define INIT_TASK_RCU_PREEMPT(tsk)
100#endif
101
102extern struct cred init_cred;
103
104#ifdef CONFIG_PERF_EVENTS
105# define INIT_PERF_EVENTS(tsk) \
106 .perf_event_mutex = \
107 __MUTEX_INITIALIZER(tsk.perf_event_mutex), \
108 .perf_event_list = LIST_HEAD_INIT(tsk.perf_event_list),
109#else
110# define INIT_PERF_EVENTS(tsk)
111#endif
112
113/*
114 * INIT_TASK is used to set up the first task table, touch at
115 * your own risk!. Base=0, limit=0x1fffff (=2MB)
116 */
117#define INIT_TASK(tsk) \
118{ \
119 .state = 0, \
120 .stack = &init_thread_info, \
121 .usage = ATOMIC_INIT(2), \
122 .flags = PF_KTHREAD, \
123 .lock_depth = -1, \
124 .prio = MAX_PRIO-20, \
125 .static_prio = MAX_PRIO-20, \
126 .normal_prio = MAX_PRIO-20, \
127 .policy = SCHED_NORMAL, \
128 .cpus_allowed = CPU_MASK_ALL, \
129 .mm = NULL, \
130 .active_mm = &init_mm, \
131 .se = { \
132 .group_node = LIST_HEAD_INIT(tsk.se.group_node), \
133 }, \
134 .rt = { \
135 .run_list = LIST_HEAD_INIT(tsk.rt.run_list), \
136 .time_slice = HZ, \
137 .nr_cpus_allowed = NR_CPUS, \
138 }, \
139 .tasks = LIST_HEAD_INIT(tsk.tasks), \
140 .pushable_tasks = PLIST_NODE_INIT(tsk.pushable_tasks, MAX_PRIO), \
141 .ptraced = LIST_HEAD_INIT(tsk.ptraced), \
142 .ptrace_entry = LIST_HEAD_INIT(tsk.ptrace_entry), \
143 .real_parent = &tsk, \
144 .parent = &tsk, \
145 .children = LIST_HEAD_INIT(tsk.children), \
146 .sibling = LIST_HEAD_INIT(tsk.sibling), \
147 .group_leader = &tsk, \
148 RCU_INIT_POINTER(.real_cred, &init_cred), \
149 RCU_INIT_POINTER(.cred, &init_cred), \
150 .comm = "swapper", \
151 .thread = INIT_THREAD, \
152 .fs = &init_fs, \
153 .files = &init_files, \
154 .signal = &init_signals, \
155 .sighand = &init_sighand, \
156 .nsproxy = &init_nsproxy, \
157 .pending = { \
158 .list = LIST_HEAD_INIT(tsk.pending.list), \
159 .signal = {{0}}}, \
160 .blocked = {{0}}, \
161 .alloc_lock = __SPIN_LOCK_UNLOCKED(tsk.alloc_lock), \
162 .journal_info = NULL, \
163 .cpu_timers = INIT_CPU_TIMERS(tsk.cpu_timers), \
164 .fs_excl = ATOMIC_INIT(0), \
165 .pi_lock = __RAW_SPIN_LOCK_UNLOCKED(tsk.pi_lock), \
166 .timer_slack_ns = 50000, /* 50 usec default slack */ \
167 .pids = { \
168 [PIDTYPE_PID] = INIT_PID_LINK(PIDTYPE_PID), \
169 [PIDTYPE_PGID] = INIT_PID_LINK(PIDTYPE_PGID), \
170 [PIDTYPE_SID] = INIT_PID_LINK(PIDTYPE_SID), \
171 }, \
172 .thread_group = LIST_HEAD_INIT(tsk.thread_group), \
173 .dirties = INIT_PROP_LOCAL_SINGLE(dirties), \
174 INIT_IDS \
175 INIT_PERF_EVENTS(tsk) \
176 INIT_TRACE_IRQFLAGS \
177 INIT_LOCKDEP \
178 INIT_FTRACE_GRAPH \
179 INIT_TRACE_RECURSION \
180 INIT_TASK_RCU_PREEMPT(tsk) \
181}
182
183
184#define INIT_CPU_TIMERS(cpu_timers) \
185{ \
186 LIST_HEAD_INIT(cpu_timers[0]), \
187 LIST_HEAD_INIT(cpu_timers[1]), \
188 LIST_HEAD_INIT(cpu_timers[2]), \
189}
190
191/* Attach to the init_task data structure for proper alignment */
192#define __init_task_data __attribute__((__section__(".data..init_task")))
193
194
195#endif