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#ifndef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
43#define INIT_PREV_CPUTIME(x) .prev_cputime = { \
44 .lock = __RAW_SPIN_LOCK_UNLOCKED(x.prev_cputime.lock), \
45},
46#else
47#define INIT_PREV_CPUTIME(x)
48#endif
49
50#define INIT_SIGNALS(sig) { \
51 .nr_threads = 1, \
52 .thread_head = LIST_HEAD_INIT(init_task.thread_node), \
53 .wait_chldexit = __WAIT_QUEUE_HEAD_INITIALIZER(sig.wait_chldexit),\
54 .shared_pending = { \
55 .list = LIST_HEAD_INIT(sig.shared_pending.list), \
56 .signal = {{0}}}, \
57 .posix_timers = LIST_HEAD_INIT(sig.posix_timers), \
58 .cpu_timers = INIT_CPU_TIMERS(sig.cpu_timers), \
59 .rlim = INIT_RLIMITS, \
60 .cputimer = { \
61 .cputime_atomic = INIT_CPUTIME_ATOMIC, \
62 .running = 0, \
63 }, \
64 INIT_PREV_CPUTIME(sig) \
65 .cred_guard_mutex = \
66 __MUTEX_INITIALIZER(sig.cred_guard_mutex), \
67 INIT_GROUP_RWSEM(sig) \
68}
69
70extern struct nsproxy init_nsproxy;
71
72#define INIT_SIGHAND(sighand) { \
73 .count = ATOMIC_INIT(1), \
74 .action = { { { .sa_handler = SIG_DFL, } }, }, \
75 .siglock = __SPIN_LOCK_UNLOCKED(sighand.siglock), \
76 .signalfd_wqh = __WAIT_QUEUE_HEAD_INITIALIZER(sighand.signalfd_wqh), \
77}
78
79extern struct group_info init_groups;
80
81#define INIT_STRUCT_PID { \
82 .count = ATOMIC_INIT(1), \
83 .tasks = { \
84 { .first = NULL }, \
85 { .first = NULL }, \
86 { .first = NULL }, \
87 }, \
88 .level = 0, \
89 .numbers = { { \
90 .nr = 0, \
91 .ns = &init_pid_ns, \
92 .pid_chain = { .next = NULL, .pprev = NULL }, \
93 }, } \
94}
95
96#define INIT_PID_LINK(type) \
97{ \
98 .node = { \
99 .next = NULL, \
100 .pprev = NULL, \
101 }, \
102 .pid = &init_struct_pid, \
103}
104
105#ifdef CONFIG_AUDITSYSCALL
106#define INIT_IDS \
107 .loginuid = INVALID_UID, \
108 .sessionid = (unsigned int)-1,
109#else
110#define INIT_IDS
111#endif
112
113#ifdef CONFIG_PREEMPT_RCU
114#define INIT_TASK_RCU_TREE_PREEMPT() \
115 .rcu_blocked_node = NULL,
116#else
117#define INIT_TASK_RCU_TREE_PREEMPT(tsk)
118#endif
119#ifdef CONFIG_PREEMPT_RCU
120#define INIT_TASK_RCU_PREEMPT(tsk) \
121 .rcu_read_lock_nesting = 0, \
122 .rcu_read_unlock_special.s = 0, \
123 .rcu_node_entry = LIST_HEAD_INIT(tsk.rcu_node_entry), \
124 INIT_TASK_RCU_TREE_PREEMPT()
125#else
126#define INIT_TASK_RCU_PREEMPT(tsk)
127#endif
128#ifdef CONFIG_TASKS_RCU
129#define INIT_TASK_RCU_TASKS(tsk) \
130 .rcu_tasks_holdout = false, \
131 .rcu_tasks_holdout_list = \
132 LIST_HEAD_INIT(tsk.rcu_tasks_holdout_list), \
133 .rcu_tasks_idle_cpu = -1,
134#else
135#define INIT_TASK_RCU_TASKS(tsk)
136#endif
137
138extern struct cred init_cred;
139
140extern struct task_group root_task_group;
141
142#ifdef CONFIG_CGROUP_SCHED
143# define INIT_CGROUP_SCHED(tsk) \
144 .sched_task_group = &root_task_group,
145#else
146# define INIT_CGROUP_SCHED(tsk)
147#endif
148
149#ifdef CONFIG_PERF_EVENTS
150# define INIT_PERF_EVENTS(tsk) \
151 .perf_event_mutex = \
152 __MUTEX_INITIALIZER(tsk.perf_event_mutex), \
153 .perf_event_list = LIST_HEAD_INIT(tsk.perf_event_list),
154#else
155# define INIT_PERF_EVENTS(tsk)
156#endif
157
158#ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN
159# define INIT_VTIME(tsk) \
160 .vtime_seqlock = __SEQLOCK_UNLOCKED(tsk.vtime_seqlock), \
161 .vtime_snap = 0, \
162 .vtime_snap_whence = VTIME_SYS,
163#else
164# define INIT_VTIME(tsk)
165#endif
166
167#define INIT_TASK_COMM "swapper"
168
169#ifdef CONFIG_RT_MUTEXES
170# define INIT_RT_MUTEXES(tsk) \
171 .pi_waiters = RB_ROOT, \
172 .pi_waiters_leftmost = NULL,
173#else
174# define INIT_RT_MUTEXES(tsk)
175#endif
176
177#ifdef CONFIG_NUMA_BALANCING
178# define INIT_NUMA_BALANCING(tsk) \
179 .numa_preferred_nid = -1, \
180 .numa_group = NULL, \
181 .numa_faults = NULL,
182#else
183# define INIT_NUMA_BALANCING(tsk)
184#endif
185
186#ifdef CONFIG_KASAN
187# define INIT_KASAN(tsk) \
188 .kasan_depth = 1,
189#else
190# define INIT_KASAN(tsk)
191#endif
192
193/*
194 * INIT_TASK is used to set up the first task table, touch at
195 * your own risk!. Base=0, limit=0x1fffff (=2MB)
196 */
197#define INIT_TASK(tsk) \
198{ \
199 .state = 0, \
200 .stack = &init_thread_info, \
201 .usage = ATOMIC_INIT(2), \
202 .flags = PF_KTHREAD, \
203 .prio = MAX_PRIO-20, \
204 .static_prio = MAX_PRIO-20, \
205 .normal_prio = MAX_PRIO-20, \
206 .policy = SCHED_NORMAL, \
207 .cpus_allowed = CPU_MASK_ALL, \
208 .nr_cpus_allowed= NR_CPUS, \
209 .mm = NULL, \
210 .active_mm = &init_mm, \
211 .restart_block = { \
212 .fn = do_no_restart_syscall, \
213 }, \
214 .se = { \
215 .group_node = LIST_HEAD_INIT(tsk.se.group_node), \
216 }, \
217 .rt = { \
218 .run_list = LIST_HEAD_INIT(tsk.rt.run_list), \
219 .time_slice = RR_TIMESLICE, \
220 }, \
221 .tasks = LIST_HEAD_INIT(tsk.tasks), \
222 INIT_PUSHABLE_TASKS(tsk) \
223 INIT_CGROUP_SCHED(tsk) \
224 .ptraced = LIST_HEAD_INIT(tsk.ptraced), \
225 .ptrace_entry = LIST_HEAD_INIT(tsk.ptrace_entry), \
226 .real_parent = &tsk, \
227 .parent = &tsk, \
228 .children = LIST_HEAD_INIT(tsk.children), \
229 .sibling = LIST_HEAD_INIT(tsk.sibling), \
230 .group_leader = &tsk, \
231 RCU_POINTER_INITIALIZER(real_cred, &init_cred), \
232 RCU_POINTER_INITIALIZER(cred, &init_cred), \
233 .comm = INIT_TASK_COMM, \
234 .thread = INIT_THREAD, \
235 .fs = &init_fs, \
236 .files = &init_files, \
237 .signal = &init_signals, \
238 .sighand = &init_sighand, \
239 .nsproxy = &init_nsproxy, \
240 .pending = { \
241 .list = LIST_HEAD_INIT(tsk.pending.list), \
242 .signal = {{0}}}, \
243 .blocked = {{0}}, \
244 .alloc_lock = __SPIN_LOCK_UNLOCKED(tsk.alloc_lock), \
245 .journal_info = NULL, \
246 .cpu_timers = INIT_CPU_TIMERS(tsk.cpu_timers), \
247 .pi_lock = __RAW_SPIN_LOCK_UNLOCKED(tsk.pi_lock), \
248 .timer_slack_ns = 50000, /* 50 usec default slack */ \
249 .pids = { \
250 [PIDTYPE_PID] = INIT_PID_LINK(PIDTYPE_PID), \
251 [PIDTYPE_PGID] = INIT_PID_LINK(PIDTYPE_PGID), \
252 [PIDTYPE_SID] = INIT_PID_LINK(PIDTYPE_SID), \
253 }, \
254 .thread_group = LIST_HEAD_INIT(tsk.thread_group), \
255 .thread_node = LIST_HEAD_INIT(init_signals.thread_head), \
256 INIT_IDS \
257 INIT_PERF_EVENTS(tsk) \
258 INIT_TRACE_IRQFLAGS \
259 INIT_LOCKDEP \
260 INIT_FTRACE_GRAPH \
261 INIT_TRACE_RECURSION \
262 INIT_TASK_RCU_PREEMPT(tsk) \
263 INIT_TASK_RCU_TASKS(tsk) \
264 INIT_CPUSET_SEQ(tsk) \
265 INIT_RT_MUTEXES(tsk) \
266 INIT_PREV_CPUTIME(tsk) \
267 INIT_VTIME(tsk) \
268 INIT_NUMA_BALANCING(tsk) \
269 INIT_KASAN(tsk) \
270}
271
272
273#define INIT_CPU_TIMERS(cpu_timers) \
274{ \
275 LIST_HEAD_INIT(cpu_timers[0]), \
276 LIST_HEAD_INIT(cpu_timers[1]), \
277 LIST_HEAD_INIT(cpu_timers[2]), \
278}
279
280/* Attach to the init_task data structure for proper alignment */
281#define __init_task_data __attribute__((__section__(".data..init_task")))
282
283
284#endif