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 <linux/rbtree.h>
15#include <net/net_namespace.h>
16#include <linux/sched/rt.h>
17
18#ifdef CONFIG_SMP
19# define INIT_PUSHABLE_TASKS(tsk) \
20 .pushable_tasks = PLIST_NODE_INIT(tsk.pushable_tasks, MAX_PRIO),
21#else
22# define INIT_PUSHABLE_TASKS(tsk)
23#endif
24
25extern struct files_struct init_files;
26extern struct fs_struct init_fs;
27
28#ifdef CONFIG_CGROUPS
29#define INIT_GROUP_RWSEM(sig) \
30 .group_rwsem = __RWSEM_INITIALIZER(sig.group_rwsem),
31#else
32#define INIT_GROUP_RWSEM(sig)
33#endif
34
35#ifdef CONFIG_CPUSETS
36#define INIT_CPUSET_SEQ(tsk) \
37 .mems_allowed_seq = SEQCNT_ZERO(tsk.mems_allowed_seq),
38#else
39#define INIT_CPUSET_SEQ(tsk)
40#endif
41
42#define INIT_SIGNALS(sig) { \
43 .nr_threads = 1, \
44 .thread_head = LIST_HEAD_INIT(init_task.thread_node), \
45 .wait_chldexit = __WAIT_QUEUE_HEAD_INITIALIZER(sig.wait_chldexit),\
46 .shared_pending = { \
47 .list = LIST_HEAD_INIT(sig.shared_pending.list), \
48 .signal = {{0}}}, \
49 .posix_timers = LIST_HEAD_INIT(sig.posix_timers), \
50 .cpu_timers = INIT_CPU_TIMERS(sig.cpu_timers), \
51 .rlim = INIT_RLIMITS, \
52 .cputimer = { \
53 .cputime = INIT_CPUTIME, \
54 .running = 0, \
55 .lock = __RAW_SPIN_LOCK_UNLOCKED(sig.cputimer.lock), \
56 }, \
57 .cred_guard_mutex = \
58 __MUTEX_INITIALIZER(sig.cred_guard_mutex), \
59 INIT_GROUP_RWSEM(sig) \
60}
61
62extern struct nsproxy init_nsproxy;
63
64#define INIT_SIGHAND(sighand) { \
65 .count = ATOMIC_INIT(1), \
66 .action = { { { .sa_handler = SIG_DFL, } }, }, \
67 .siglock = __SPIN_LOCK_UNLOCKED(sighand.siglock), \
68 .signalfd_wqh = __WAIT_QUEUE_HEAD_INITIALIZER(sighand.signalfd_wqh), \
69}
70
71extern struct group_info init_groups;
72
73#define INIT_STRUCT_PID { \
74 .count = ATOMIC_INIT(1), \
75 .tasks = { \
76 { .first = NULL }, \
77 { .first = NULL }, \
78 { .first = NULL }, \
79 }, \
80 .level = 0, \
81 .numbers = { { \
82 .nr = 0, \
83 .ns = &init_pid_ns, \
84 .pid_chain = { .next = NULL, .pprev = NULL }, \
85 }, } \
86}
87
88#define INIT_PID_LINK(type) \
89{ \
90 .node = { \
91 .next = NULL, \
92 .pprev = NULL, \
93 }, \
94 .pid = &init_struct_pid, \
95}
96
97#ifdef CONFIG_AUDITSYSCALL
98#define INIT_IDS \
99 .loginuid = INVALID_UID, \
100 .sessionid = (unsigned int)-1,
101#else
102#define INIT_IDS
103#endif
104
105#ifdef CONFIG_RCU_BOOST
106#define INIT_TASK_RCU_BOOST() \
107 .rcu_boost_mutex = NULL,
108#else
109#define INIT_TASK_RCU_BOOST()
110#endif
111#ifdef CONFIG_TREE_PREEMPT_RCU
112#define INIT_TASK_RCU_TREE_PREEMPT() \
113 .rcu_blocked_node = NULL,
114#else
115#define INIT_TASK_RCU_TREE_PREEMPT(tsk)
116#endif
117#ifdef CONFIG_PREEMPT_RCU
118#define INIT_TASK_RCU_PREEMPT(tsk) \
119 .rcu_read_lock_nesting = 0, \
120 .rcu_read_unlock_special = 0, \
121 .rcu_node_entry = LIST_HEAD_INIT(tsk.rcu_node_entry), \
122 INIT_TASK_RCU_TREE_PREEMPT() \
123 INIT_TASK_RCU_BOOST()
124#else
125#define INIT_TASK_RCU_PREEMPT(tsk)
126#endif
127
128extern struct cred init_cred;
129
130extern struct task_group root_task_group;
131
132#ifdef CONFIG_CGROUP_SCHED
133# define INIT_CGROUP_SCHED(tsk) \
134 .sched_task_group = &root_task_group,
135#else
136# define INIT_CGROUP_SCHED(tsk)
137#endif
138
139#ifdef CONFIG_PERF_EVENTS
140# define INIT_PERF_EVENTS(tsk) \
141 .perf_event_mutex = \
142 __MUTEX_INITIALIZER(tsk.perf_event_mutex), \
143 .perf_event_list = LIST_HEAD_INIT(tsk.perf_event_list),
144#else
145# define INIT_PERF_EVENTS(tsk)
146#endif
147
148#ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN
149# define INIT_VTIME(tsk) \
150 .vtime_seqlock = __SEQLOCK_UNLOCKED(tsk.vtime_seqlock), \
151 .vtime_snap = 0, \
152 .vtime_snap_whence = VTIME_SYS,
153#else
154# define INIT_VTIME(tsk)
155#endif
156
157#define INIT_TASK_COMM "swapper"
158
159#ifdef CONFIG_RT_MUTEXES
160# define INIT_RT_MUTEXES(tsk) \
161 .pi_waiters = RB_ROOT, \
162 .pi_waiters_leftmost = NULL,
163#else
164# define INIT_RT_MUTEXES(tsk)
165#endif
166
167/*
168 * INIT_TASK is used to set up the first task table, touch at
169 * your own risk!. Base=0, limit=0x1fffff (=2MB)
170 */
171#define INIT_TASK(tsk) \
172{ \
173 .state = 0, \
174 .stack = &init_thread_info, \
175 .usage = ATOMIC_INIT(2), \
176 .flags = PF_KTHREAD, \
177 .prio = MAX_PRIO-20, \
178 .static_prio = MAX_PRIO-20, \
179 .normal_prio = MAX_PRIO-20, \
180 .policy = SCHED_NORMAL, \
181 .cpus_allowed = CPU_MASK_ALL, \
182 .nr_cpus_allowed= NR_CPUS, \
183 .mm = NULL, \
184 .active_mm = &init_mm, \
185 .se = { \
186 .group_node = LIST_HEAD_INIT(tsk.se.group_node), \
187 }, \
188 .rt = { \
189 .run_list = LIST_HEAD_INIT(tsk.rt.run_list), \
190 .time_slice = RR_TIMESLICE, \
191 }, \
192 .tasks = LIST_HEAD_INIT(tsk.tasks), \
193 INIT_PUSHABLE_TASKS(tsk) \
194 INIT_CGROUP_SCHED(tsk) \
195 .ptraced = LIST_HEAD_INIT(tsk.ptraced), \
196 .ptrace_entry = LIST_HEAD_INIT(tsk.ptrace_entry), \
197 .real_parent = &tsk, \
198 .parent = &tsk, \
199 .children = LIST_HEAD_INIT(tsk.children), \
200 .sibling = LIST_HEAD_INIT(tsk.sibling), \
201 .group_leader = &tsk, \
202 RCU_POINTER_INITIALIZER(real_cred, &init_cred), \
203 RCU_POINTER_INITIALIZER(cred, &init_cred), \
204 .comm = INIT_TASK_COMM, \
205 .thread = INIT_THREAD, \
206 .fs = &init_fs, \
207 .files = &init_files, \
208 .signal = &init_signals, \
209 .sighand = &init_sighand, \
210 .nsproxy = &init_nsproxy, \
211 .pending = { \
212 .list = LIST_HEAD_INIT(tsk.pending.list), \
213 .signal = {{0}}}, \
214 .blocked = {{0}}, \
215 .alloc_lock = __SPIN_LOCK_UNLOCKED(tsk.alloc_lock), \
216 .journal_info = NULL, \
217 .cpu_timers = INIT_CPU_TIMERS(tsk.cpu_timers), \
218 .pi_lock = __RAW_SPIN_LOCK_UNLOCKED(tsk.pi_lock), \
219 .timer_slack_ns = 50000, /* 50 usec default slack */ \
220 .pids = { \
221 [PIDTYPE_PID] = INIT_PID_LINK(PIDTYPE_PID), \
222 [PIDTYPE_PGID] = INIT_PID_LINK(PIDTYPE_PGID), \
223 [PIDTYPE_SID] = INIT_PID_LINK(PIDTYPE_SID), \
224 }, \
225 .thread_group = LIST_HEAD_INIT(tsk.thread_group), \
226 .thread_node = LIST_HEAD_INIT(init_signals.thread_head), \
227 INIT_IDS \
228 INIT_PERF_EVENTS(tsk) \
229 INIT_TRACE_IRQFLAGS \
230 INIT_LOCKDEP \
231 INIT_FTRACE_GRAPH \
232 INIT_TRACE_RECURSION \
233 INIT_TASK_RCU_PREEMPT(tsk) \
234 INIT_CPUSET_SEQ(tsk) \
235 INIT_RT_MUTEXES(tsk) \
236 INIT_VTIME(tsk) \
237}
238
239
240#define INIT_CPU_TIMERS(cpu_timers) \
241{ \
242 LIST_HEAD_INIT(cpu_timers[0]), \
243 LIST_HEAD_INIT(cpu_timers[1]), \
244 LIST_HEAD_INIT(cpu_timers[2]), \
245}
246
247/* Attach to the init_task data structure for proper alignment */
248#define __init_task_data __attribute__((__section__(".data..init_task")))
249
250
251#endif