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 <linux/seqlock.h>
14#include <net/net_namespace.h>
15#include <linux/sched/rt.h>
16
17#ifdef CONFIG_SMP
18# define INIT_PUSHABLE_TASKS(tsk) \
19 .pushable_tasks = PLIST_NODE_INIT(tsk.pushable_tasks, MAX_PRIO),
20#else
21# define INIT_PUSHABLE_TASKS(tsk)
22#endif
23
24extern struct files_struct init_files;
25extern struct fs_struct init_fs;
26
27#ifdef CONFIG_CGROUPS
28#define INIT_GROUP_RWSEM(sig) \
29 .group_rwsem = __RWSEM_INITIALIZER(sig.group_rwsem),
30#else
31#define INIT_GROUP_RWSEM(sig)
32#endif
33
34#ifdef CONFIG_CPUSETS
35#define INIT_CPUSET_SEQ \
36 .mems_allowed_seq = SEQCNT_ZERO,
37#else
38#define INIT_CPUSET_SEQ
39#endif
40
41#define INIT_SIGNALS(sig) { \
42 .nr_threads = 1, \
43 .wait_chldexit = __WAIT_QUEUE_HEAD_INITIALIZER(sig.wait_chldexit),\
44 .shared_pending = { \
45 .list = LIST_HEAD_INIT(sig.shared_pending.list), \
46 .signal = {{0}}}, \
47 .posix_timers = LIST_HEAD_INIT(sig.posix_timers), \
48 .cpu_timers = INIT_CPU_TIMERS(sig.cpu_timers), \
49 .rlim = INIT_RLIMITS, \
50 .cputimer = { \
51 .cputime = INIT_CPUTIME, \
52 .running = 0, \
53 .lock = __RAW_SPIN_LOCK_UNLOCKED(sig.cputimer.lock), \
54 }, \
55 .cred_guard_mutex = \
56 __MUTEX_INITIALIZER(sig.cred_guard_mutex), \
57 INIT_GROUP_RWSEM(sig) \
58}
59
60extern struct nsproxy init_nsproxy;
61
62#define INIT_SIGHAND(sighand) { \
63 .count = ATOMIC_INIT(1), \
64 .action = { { { .sa_handler = SIG_DFL, } }, }, \
65 .siglock = __SPIN_LOCK_UNLOCKED(sighand.siglock), \
66 .signalfd_wqh = __WAIT_QUEUE_HEAD_INITIALIZER(sighand.signalfd_wqh), \
67}
68
69extern struct group_info init_groups;
70
71#define INIT_STRUCT_PID { \
72 .count = ATOMIC_INIT(1), \
73 .tasks = { \
74 { .first = NULL }, \
75 { .first = NULL }, \
76 { .first = NULL }, \
77 }, \
78 .level = 0, \
79 .numbers = { { \
80 .nr = 0, \
81 .ns = &init_pid_ns, \
82 .pid_chain = { .next = NULL, .pprev = NULL }, \
83 }, } \
84}
85
86#define INIT_PID_LINK(type) \
87{ \
88 .node = { \
89 .next = NULL, \
90 .pprev = NULL, \
91 }, \
92 .pid = &init_struct_pid, \
93}
94
95#ifdef CONFIG_AUDITSYSCALL
96#define INIT_IDS \
97 .loginuid = INVALID_UID, \
98 .sessionid = -1,
99#else
100#define INIT_IDS
101#endif
102
103#ifdef CONFIG_RCU_BOOST
104#define INIT_TASK_RCU_BOOST() \
105 .rcu_boost_mutex = NULL,
106#else
107#define INIT_TASK_RCU_BOOST()
108#endif
109#ifdef CONFIG_TREE_PREEMPT_RCU
110#define INIT_TASK_RCU_TREE_PREEMPT() \
111 .rcu_blocked_node = NULL,
112#else
113#define INIT_TASK_RCU_TREE_PREEMPT(tsk)
114#endif
115#ifdef CONFIG_PREEMPT_RCU
116#define INIT_TASK_RCU_PREEMPT(tsk) \
117 .rcu_read_lock_nesting = 0, \
118 .rcu_read_unlock_special = 0, \
119 .rcu_node_entry = LIST_HEAD_INIT(tsk.rcu_node_entry), \
120 INIT_TASK_RCU_TREE_PREEMPT() \
121 INIT_TASK_RCU_BOOST()
122#else
123#define INIT_TASK_RCU_PREEMPT(tsk)
124#endif
125
126extern struct cred init_cred;
127
128extern struct task_group root_task_group;
129
130#ifdef CONFIG_CGROUP_SCHED
131# define INIT_CGROUP_SCHED(tsk) \
132 .sched_task_group = &root_task_group,
133#else
134# define INIT_CGROUP_SCHED(tsk)
135#endif
136
137#ifdef CONFIG_PERF_EVENTS
138# define INIT_PERF_EVENTS(tsk) \
139 .perf_event_mutex = \
140 __MUTEX_INITIALIZER(tsk.perf_event_mutex), \
141 .perf_event_list = LIST_HEAD_INIT(tsk.perf_event_list),
142#else
143# define INIT_PERF_EVENTS(tsk)
144#endif
145
146#ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN
147# define INIT_VTIME(tsk) \
148 .vtime_seqlock = __SEQLOCK_UNLOCKED(tsk.vtime_seqlock), \
149 .vtime_snap = 0, \
150 .vtime_snap_whence = VTIME_SYS,
151#else
152# define INIT_VTIME(tsk)
153#endif
154
155#define INIT_TASK_COMM "swapper"
156
157/*
158 * INIT_TASK is used to set up the first task table, touch at
159 * your own risk!. Base=0, limit=0x1fffff (=2MB)
160 */
161#define INIT_TASK(tsk) \
162{ \
163 .state = 0, \
164 .stack = &init_thread_info, \
165 .usage = ATOMIC_INIT(2), \
166 .flags = PF_KTHREAD, \
167 .prio = MAX_PRIO-20, \
168 .static_prio = MAX_PRIO-20, \
169 .normal_prio = MAX_PRIO-20, \
170 .policy = SCHED_NORMAL, \
171 .cpus_allowed = CPU_MASK_ALL, \
172 .nr_cpus_allowed= NR_CPUS, \
173 .mm = NULL, \
174 .active_mm = &init_mm, \
175 .se = { \
176 .group_node = LIST_HEAD_INIT(tsk.se.group_node), \
177 }, \
178 .rt = { \
179 .run_list = LIST_HEAD_INIT(tsk.rt.run_list), \
180 .time_slice = RR_TIMESLICE, \
181 }, \
182 .tasks = LIST_HEAD_INIT(tsk.tasks), \
183 INIT_PUSHABLE_TASKS(tsk) \
184 INIT_CGROUP_SCHED(tsk) \
185 .ptraced = LIST_HEAD_INIT(tsk.ptraced), \
186 .ptrace_entry = LIST_HEAD_INIT(tsk.ptrace_entry), \
187 .real_parent = &tsk, \
188 .parent = &tsk, \
189 .children = LIST_HEAD_INIT(tsk.children), \
190 .sibling = LIST_HEAD_INIT(tsk.sibling), \
191 .group_leader = &tsk, \
192 RCU_POINTER_INITIALIZER(real_cred, &init_cred), \
193 RCU_POINTER_INITIALIZER(cred, &init_cred), \
194 .comm = INIT_TASK_COMM, \
195 .thread = INIT_THREAD, \
196 .fs = &init_fs, \
197 .files = &init_files, \
198 .signal = &init_signals, \
199 .sighand = &init_sighand, \
200 .nsproxy = &init_nsproxy, \
201 .pending = { \
202 .list = LIST_HEAD_INIT(tsk.pending.list), \
203 .signal = {{0}}}, \
204 .blocked = {{0}}, \
205 .alloc_lock = __SPIN_LOCK_UNLOCKED(tsk.alloc_lock), \
206 .journal_info = NULL, \
207 .cpu_timers = INIT_CPU_TIMERS(tsk.cpu_timers), \
208 .pi_lock = __RAW_SPIN_LOCK_UNLOCKED(tsk.pi_lock), \
209 .timer_slack_ns = 50000, /* 50 usec default slack */ \
210 .pids = { \
211 [PIDTYPE_PID] = INIT_PID_LINK(PIDTYPE_PID), \
212 [PIDTYPE_PGID] = INIT_PID_LINK(PIDTYPE_PGID), \
213 [PIDTYPE_SID] = INIT_PID_LINK(PIDTYPE_SID), \
214 }, \
215 .thread_group = LIST_HEAD_INIT(tsk.thread_group), \
216 INIT_IDS \
217 INIT_PERF_EVENTS(tsk) \
218 INIT_TRACE_IRQFLAGS \
219 INIT_LOCKDEP \
220 INIT_FTRACE_GRAPH \
221 INIT_TRACE_RECURSION \
222 INIT_TASK_RCU_PREEMPT(tsk) \
223 INIT_CPUSET_SEQ \
224 INIT_VTIME(tsk) \
225}
226
227
228#define INIT_CPU_TIMERS(cpu_timers) \
229{ \
230 LIST_HEAD_INIT(cpu_timers[0]), \
231 LIST_HEAD_INIT(cpu_timers[1]), \
232 LIST_HEAD_INIT(cpu_timers[2]), \
233}
234
235/* Attach to the init_task data structure for proper alignment */
236#define __init_task_data __attribute__((__section__(".data..init_task")))
237
238
239#endif