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_CPUSETS
29#define INIT_CPUSET_SEQ(tsk) \
30 .mems_allowed_seq = SEQCNT_ZERO(tsk.mems_allowed_seq),
31#else
32#define INIT_CPUSET_SEQ(tsk)
33#endif
34
35#define INIT_SIGNALS(sig) { \
36 .nr_threads = 1, \
37 .thread_head = LIST_HEAD_INIT(init_task.thread_node), \
38 .wait_chldexit = __WAIT_QUEUE_HEAD_INITIALIZER(sig.wait_chldexit),\
39 .shared_pending = { \
40 .list = LIST_HEAD_INIT(sig.shared_pending.list), \
41 .signal = {{0}}}, \
42 .posix_timers = LIST_HEAD_INIT(sig.posix_timers), \
43 .cpu_timers = INIT_CPU_TIMERS(sig.cpu_timers), \
44 .rlim = INIT_RLIMITS, \
45 .cputimer = { \
46 .cputime_atomic = INIT_CPUTIME_ATOMIC, \
47 .running = 0, \
48 }, \
49 .cred_guard_mutex = \
50 __MUTEX_INITIALIZER(sig.cred_guard_mutex), \
51}
52
53extern struct nsproxy init_nsproxy;
54
55#define INIT_SIGHAND(sighand) { \
56 .count = ATOMIC_INIT(1), \
57 .action = { { { .sa_handler = SIG_DFL, } }, }, \
58 .siglock = __SPIN_LOCK_UNLOCKED(sighand.siglock), \
59 .signalfd_wqh = __WAIT_QUEUE_HEAD_INITIALIZER(sighand.signalfd_wqh), \
60}
61
62extern struct group_info init_groups;
63
64#define INIT_STRUCT_PID { \
65 .count = ATOMIC_INIT(1), \
66 .tasks = { \
67 { .first = NULL }, \
68 { .first = NULL }, \
69 { .first = NULL }, \
70 }, \
71 .level = 0, \
72 .numbers = { { \
73 .nr = 0, \
74 .ns = &init_pid_ns, \
75 .pid_chain = { .next = NULL, .pprev = NULL }, \
76 }, } \
77}
78
79#define INIT_PID_LINK(type) \
80{ \
81 .node = { \
82 .next = NULL, \
83 .pprev = NULL, \
84 }, \
85 .pid = &init_struct_pid, \
86}
87
88#ifdef CONFIG_AUDITSYSCALL
89#define INIT_IDS \
90 .loginuid = INVALID_UID, \
91 .sessionid = (unsigned int)-1,
92#else
93#define INIT_IDS
94#endif
95
96#ifdef CONFIG_PREEMPT_RCU
97#define INIT_TASK_RCU_TREE_PREEMPT() \
98 .rcu_blocked_node = NULL,
99#else
100#define INIT_TASK_RCU_TREE_PREEMPT(tsk)
101#endif
102#ifdef CONFIG_PREEMPT_RCU
103#define INIT_TASK_RCU_PREEMPT(tsk) \
104 .rcu_read_lock_nesting = 0, \
105 .rcu_read_unlock_special.s = 0, \
106 .rcu_node_entry = LIST_HEAD_INIT(tsk.rcu_node_entry), \
107 INIT_TASK_RCU_TREE_PREEMPT()
108#else
109#define INIT_TASK_RCU_PREEMPT(tsk)
110#endif
111#ifdef CONFIG_TASKS_RCU
112#define INIT_TASK_RCU_TASKS(tsk) \
113 .rcu_tasks_holdout = false, \
114 .rcu_tasks_holdout_list = \
115 LIST_HEAD_INIT(tsk.rcu_tasks_holdout_list), \
116 .rcu_tasks_idle_cpu = -1,
117#else
118#define INIT_TASK_RCU_TASKS(tsk)
119#endif
120
121extern struct cred init_cred;
122
123extern struct task_group root_task_group;
124
125#ifdef CONFIG_CGROUP_SCHED
126# define INIT_CGROUP_SCHED(tsk) \
127 .sched_task_group = &root_task_group,
128#else
129# define INIT_CGROUP_SCHED(tsk)
130#endif
131
132#ifdef CONFIG_PERF_EVENTS
133# define INIT_PERF_EVENTS(tsk) \
134 .perf_event_mutex = \
135 __MUTEX_INITIALIZER(tsk.perf_event_mutex), \
136 .perf_event_list = LIST_HEAD_INIT(tsk.perf_event_list),
137#else
138# define INIT_PERF_EVENTS(tsk)
139#endif
140
141#ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN
142# define INIT_VTIME(tsk) \
143 .vtime_seqlock = __SEQLOCK_UNLOCKED(tsk.vtime_seqlock), \
144 .vtime_snap = 0, \
145 .vtime_snap_whence = VTIME_SYS,
146#else
147# define INIT_VTIME(tsk)
148#endif
149
150#define INIT_TASK_COMM "swapper"
151
152#ifdef CONFIG_RT_MUTEXES
153# define INIT_RT_MUTEXES(tsk) \
154 .pi_waiters = RB_ROOT, \
155 .pi_waiters_leftmost = NULL,
156#else
157# define INIT_RT_MUTEXES(tsk)
158#endif
159
160#ifdef CONFIG_NUMA_BALANCING
161# define INIT_NUMA_BALANCING(tsk) \
162 .numa_preferred_nid = -1, \
163 .numa_group = NULL, \
164 .numa_faults = NULL,
165#else
166# define INIT_NUMA_BALANCING(tsk)
167#endif
168
169#ifdef CONFIG_KASAN
170# define INIT_KASAN(tsk) \
171 .kasan_depth = 1,
172#else
173# define INIT_KASAN(tsk)
174#endif
175
176/*
177 * INIT_TASK is used to set up the first task table, touch at
178 * your own risk!. Base=0, limit=0x1fffff (=2MB)
179 */
180#define INIT_TASK(tsk) \
181{ \
182 .state = 0, \
183 .stack = &init_thread_info, \
184 .usage = ATOMIC_INIT(2), \
185 .flags = PF_KTHREAD, \
186 .prio = MAX_PRIO-20, \
187 .static_prio = MAX_PRIO-20, \
188 .normal_prio = MAX_PRIO-20, \
189 .policy = SCHED_NORMAL, \
190 .cpus_allowed = CPU_MASK_ALL, \
191 .nr_cpus_allowed= NR_CPUS, \
192 .mm = NULL, \
193 .active_mm = &init_mm, \
194 .restart_block = { \
195 .fn = do_no_restart_syscall, \
196 }, \
197 .se = { \
198 .group_node = LIST_HEAD_INIT(tsk.se.group_node), \
199 }, \
200 .rt = { \
201 .run_list = LIST_HEAD_INIT(tsk.rt.run_list), \
202 .time_slice = RR_TIMESLICE, \
203 }, \
204 .tasks = LIST_HEAD_INIT(tsk.tasks), \
205 INIT_PUSHABLE_TASKS(tsk) \
206 INIT_CGROUP_SCHED(tsk) \
207 .ptraced = LIST_HEAD_INIT(tsk.ptraced), \
208 .ptrace_entry = LIST_HEAD_INIT(tsk.ptrace_entry), \
209 .real_parent = &tsk, \
210 .parent = &tsk, \
211 .children = LIST_HEAD_INIT(tsk.children), \
212 .sibling = LIST_HEAD_INIT(tsk.sibling), \
213 .group_leader = &tsk, \
214 RCU_POINTER_INITIALIZER(real_cred, &init_cred), \
215 RCU_POINTER_INITIALIZER(cred, &init_cred), \
216 .comm = INIT_TASK_COMM, \
217 .thread = INIT_THREAD, \
218 .fs = &init_fs, \
219 .files = &init_files, \
220 .signal = &init_signals, \
221 .sighand = &init_sighand, \
222 .nsproxy = &init_nsproxy, \
223 .pending = { \
224 .list = LIST_HEAD_INIT(tsk.pending.list), \
225 .signal = {{0}}}, \
226 .blocked = {{0}}, \
227 .alloc_lock = __SPIN_LOCK_UNLOCKED(tsk.alloc_lock), \
228 .journal_info = NULL, \
229 .cpu_timers = INIT_CPU_TIMERS(tsk.cpu_timers), \
230 .pi_lock = __RAW_SPIN_LOCK_UNLOCKED(tsk.pi_lock), \
231 .timer_slack_ns = 50000, /* 50 usec default slack */ \
232 .pids = { \
233 [PIDTYPE_PID] = INIT_PID_LINK(PIDTYPE_PID), \
234 [PIDTYPE_PGID] = INIT_PID_LINK(PIDTYPE_PGID), \
235 [PIDTYPE_SID] = INIT_PID_LINK(PIDTYPE_SID), \
236 }, \
237 .thread_group = LIST_HEAD_INIT(tsk.thread_group), \
238 .thread_node = LIST_HEAD_INIT(init_signals.thread_head), \
239 INIT_IDS \
240 INIT_PERF_EVENTS(tsk) \
241 INIT_TRACE_IRQFLAGS \
242 INIT_LOCKDEP \
243 INIT_FTRACE_GRAPH \
244 INIT_TRACE_RECURSION \
245 INIT_TASK_RCU_PREEMPT(tsk) \
246 INIT_TASK_RCU_TASKS(tsk) \
247 INIT_CPUSET_SEQ(tsk) \
248 INIT_RT_MUTEXES(tsk) \
249 INIT_VTIME(tsk) \
250 INIT_NUMA_BALANCING(tsk) \
251 INIT_KASAN(tsk) \
252}
253
254
255#define INIT_CPU_TIMERS(cpu_timers) \
256{ \
257 LIST_HEAD_INIT(cpu_timers[0]), \
258 LIST_HEAD_INIT(cpu_timers[1]), \
259 LIST_HEAD_INIT(cpu_timers[2]), \
260}
261
262/* Attach to the init_task data structure for proper alignment */
263#define __init_task_data __attribute__((__section__(".data..init_task")))
264
265
266#endif