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 <linux/sched/autogroup.h>
16#include <net/net_namespace.h>
17#include <linux/sched/rt.h>
18#include <linux/livepatch.h>
19#include <linux/mm_types.h>
20
21#include <asm/thread_info.h>
22
23#ifdef CONFIG_SMP
24# define INIT_PUSHABLE_TASKS(tsk) \
25 .pushable_tasks = PLIST_NODE_INIT(tsk.pushable_tasks, MAX_PRIO),
26#else
27# define INIT_PUSHABLE_TASKS(tsk)
28#endif
29
30extern struct files_struct init_files;
31extern struct fs_struct init_fs;
32
33#ifdef CONFIG_CPUSETS
34#define INIT_CPUSET_SEQ(tsk) \
35 .mems_allowed_seq = SEQCNT_ZERO(tsk.mems_allowed_seq),
36#else
37#define INIT_CPUSET_SEQ(tsk)
38#endif
39
40#ifndef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
41#define INIT_PREV_CPUTIME(x) .prev_cputime = { \
42 .lock = __RAW_SPIN_LOCK_UNLOCKED(x.prev_cputime.lock), \
43},
44#else
45#define INIT_PREV_CPUTIME(x)
46#endif
47
48#ifdef CONFIG_POSIX_TIMERS
49#define INIT_POSIX_TIMERS(s) \
50 .posix_timers = LIST_HEAD_INIT(s.posix_timers),
51#define INIT_CPU_TIMERS(s) \
52 .cpu_timers = { \
53 LIST_HEAD_INIT(s.cpu_timers[0]), \
54 LIST_HEAD_INIT(s.cpu_timers[1]), \
55 LIST_HEAD_INIT(s.cpu_timers[2]), \
56 },
57#define INIT_CPUTIMER(s) \
58 .cputimer = { \
59 .cputime_atomic = INIT_CPUTIME_ATOMIC, \
60 .running = false, \
61 .checking_timer = false, \
62 },
63#else
64#define INIT_POSIX_TIMERS(s)
65#define INIT_CPU_TIMERS(s)
66#define INIT_CPUTIMER(s)
67#endif
68
69#define INIT_SIGNALS(sig) { \
70 .nr_threads = 1, \
71 .thread_head = LIST_HEAD_INIT(init_task.thread_node), \
72 .wait_chldexit = __WAIT_QUEUE_HEAD_INITIALIZER(sig.wait_chldexit),\
73 .shared_pending = { \
74 .list = LIST_HEAD_INIT(sig.shared_pending.list), \
75 .signal = {{0}}}, \
76 INIT_POSIX_TIMERS(sig) \
77 INIT_CPU_TIMERS(sig) \
78 .rlim = INIT_RLIMITS, \
79 INIT_CPUTIMER(sig) \
80 INIT_PREV_CPUTIME(sig) \
81 .cred_guard_mutex = \
82 __MUTEX_INITIALIZER(sig.cred_guard_mutex), \
83}
84
85extern struct nsproxy init_nsproxy;
86
87#define INIT_SIGHAND(sighand) { \
88 .count = ATOMIC_INIT(1), \
89 .action = { { { .sa_handler = SIG_DFL, } }, }, \
90 .siglock = __SPIN_LOCK_UNLOCKED(sighand.siglock), \
91 .signalfd_wqh = __WAIT_QUEUE_HEAD_INITIALIZER(sighand.signalfd_wqh), \
92}
93
94extern struct group_info init_groups;
95
96#define INIT_STRUCT_PID { \
97 .count = ATOMIC_INIT(1), \
98 .tasks = { \
99 { .first = NULL }, \
100 { .first = NULL }, \
101 { .first = NULL }, \
102 }, \
103 .level = 0, \
104 .numbers = { { \
105 .nr = 0, \
106 .ns = &init_pid_ns, \
107 .pid_chain = { .next = NULL, .pprev = NULL }, \
108 }, } \
109}
110
111#define INIT_PID_LINK(type) \
112{ \
113 .node = { \
114 .next = NULL, \
115 .pprev = NULL, \
116 }, \
117 .pid = &init_struct_pid, \
118}
119
120#ifdef CONFIG_AUDITSYSCALL
121#define INIT_IDS \
122 .loginuid = INVALID_UID, \
123 .sessionid = (unsigned int)-1,
124#else
125#define INIT_IDS
126#endif
127
128#ifdef CONFIG_PREEMPT_RCU
129#define INIT_TASK_RCU_PREEMPT(tsk) \
130 .rcu_read_lock_nesting = 0, \
131 .rcu_read_unlock_special.s = 0, \
132 .rcu_node_entry = LIST_HEAD_INIT(tsk.rcu_node_entry), \
133 .rcu_blocked_node = NULL,
134#else
135#define INIT_TASK_RCU_PREEMPT(tsk)
136#endif
137#ifdef CONFIG_TASKS_RCU
138#define INIT_TASK_RCU_TASKS(tsk) \
139 .rcu_tasks_holdout = false, \
140 .rcu_tasks_holdout_list = \
141 LIST_HEAD_INIT(tsk.rcu_tasks_holdout_list), \
142 .rcu_tasks_idle_cpu = -1,
143#else
144#define INIT_TASK_RCU_TASKS(tsk)
145#endif
146
147extern struct cred init_cred;
148
149#ifdef CONFIG_CGROUP_SCHED
150# define INIT_CGROUP_SCHED(tsk) \
151 .sched_task_group = &root_task_group,
152#else
153# define INIT_CGROUP_SCHED(tsk)
154#endif
155
156#ifdef CONFIG_PERF_EVENTS
157# define INIT_PERF_EVENTS(tsk) \
158 .perf_event_mutex = \
159 __MUTEX_INITIALIZER(tsk.perf_event_mutex), \
160 .perf_event_list = LIST_HEAD_INIT(tsk.perf_event_list),
161#else
162# define INIT_PERF_EVENTS(tsk)
163#endif
164
165#ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN
166# define INIT_VTIME(tsk) \
167 .vtime.seqcount = SEQCNT_ZERO(tsk.vtime.seqcount), \
168 .vtime.starttime = 0, \
169 .vtime.state = VTIME_SYS,
170#else
171# define INIT_VTIME(tsk)
172#endif
173
174#define INIT_TASK_COMM "swapper"
175
176#ifdef CONFIG_RT_MUTEXES
177# define INIT_RT_MUTEXES(tsk) \
178 .pi_waiters = RB_ROOT_CACHED, \
179 .pi_top_task = NULL,
180#else
181# define INIT_RT_MUTEXES(tsk)
182#endif
183
184#ifdef CONFIG_NUMA_BALANCING
185# define INIT_NUMA_BALANCING(tsk) \
186 .numa_preferred_nid = -1, \
187 .numa_group = NULL, \
188 .numa_faults = NULL,
189#else
190# define INIT_NUMA_BALANCING(tsk)
191#endif
192
193#ifdef CONFIG_KASAN
194# define INIT_KASAN(tsk) \
195 .kasan_depth = 1,
196#else
197# define INIT_KASAN(tsk)
198#endif
199
200#ifdef CONFIG_LIVEPATCH
201# define INIT_LIVEPATCH(tsk) \
202 .patch_state = KLP_UNDEFINED,
203#else
204# define INIT_LIVEPATCH(tsk)
205#endif
206
207#ifdef CONFIG_THREAD_INFO_IN_TASK
208# define INIT_TASK_TI(tsk) \
209 .thread_info = INIT_THREAD_INFO(tsk), \
210 .stack_refcount = ATOMIC_INIT(1),
211#else
212# define INIT_TASK_TI(tsk)
213#endif
214
215#ifdef CONFIG_SECURITY
216#define INIT_TASK_SECURITY .security = NULL,
217#else
218#define INIT_TASK_SECURITY
219#endif
220
221/*
222 * INIT_TASK is used to set up the first task table, touch at
223 * your own risk!. Base=0, limit=0x1fffff (=2MB)
224 */
225#define INIT_TASK(tsk) \
226{ \
227 INIT_TASK_TI(tsk) \
228 .state = 0, \
229 .stack = init_stack, \
230 .usage = ATOMIC_INIT(2), \
231 .flags = PF_KTHREAD, \
232 .prio = MAX_PRIO-20, \
233 .static_prio = MAX_PRIO-20, \
234 .normal_prio = MAX_PRIO-20, \
235 .policy = SCHED_NORMAL, \
236 .cpus_allowed = CPU_MASK_ALL, \
237 .nr_cpus_allowed= NR_CPUS, \
238 .mm = NULL, \
239 .active_mm = &init_mm, \
240 .restart_block = { \
241 .fn = do_no_restart_syscall, \
242 }, \
243 .se = { \
244 .group_node = LIST_HEAD_INIT(tsk.se.group_node), \
245 }, \
246 .rt = { \
247 .run_list = LIST_HEAD_INIT(tsk.rt.run_list), \
248 .time_slice = RR_TIMESLICE, \
249 }, \
250 .tasks = LIST_HEAD_INIT(tsk.tasks), \
251 INIT_PUSHABLE_TASKS(tsk) \
252 INIT_CGROUP_SCHED(tsk) \
253 .ptraced = LIST_HEAD_INIT(tsk.ptraced), \
254 .ptrace_entry = LIST_HEAD_INIT(tsk.ptrace_entry), \
255 .real_parent = &tsk, \
256 .parent = &tsk, \
257 .children = LIST_HEAD_INIT(tsk.children), \
258 .sibling = LIST_HEAD_INIT(tsk.sibling), \
259 .group_leader = &tsk, \
260 RCU_POINTER_INITIALIZER(real_cred, &init_cred), \
261 RCU_POINTER_INITIALIZER(cred, &init_cred), \
262 .comm = INIT_TASK_COMM, \
263 .thread = INIT_THREAD, \
264 .fs = &init_fs, \
265 .files = &init_files, \
266 .signal = &init_signals, \
267 .sighand = &init_sighand, \
268 .nsproxy = &init_nsproxy, \
269 .pending = { \
270 .list = LIST_HEAD_INIT(tsk.pending.list), \
271 .signal = {{0}}}, \
272 .blocked = {{0}}, \
273 .alloc_lock = __SPIN_LOCK_UNLOCKED(tsk.alloc_lock), \
274 .journal_info = NULL, \
275 INIT_CPU_TIMERS(tsk) \
276 .pi_lock = __RAW_SPIN_LOCK_UNLOCKED(tsk.pi_lock), \
277 .timer_slack_ns = 50000, /* 50 usec default slack */ \
278 .pids = { \
279 [PIDTYPE_PID] = INIT_PID_LINK(PIDTYPE_PID), \
280 [PIDTYPE_PGID] = INIT_PID_LINK(PIDTYPE_PGID), \
281 [PIDTYPE_SID] = INIT_PID_LINK(PIDTYPE_SID), \
282 }, \
283 .thread_group = LIST_HEAD_INIT(tsk.thread_group), \
284 .thread_node = LIST_HEAD_INIT(init_signals.thread_head), \
285 INIT_IDS \
286 INIT_PERF_EVENTS(tsk) \
287 INIT_TRACE_IRQFLAGS \
288 INIT_LOCKDEP \
289 INIT_FTRACE_GRAPH \
290 INIT_TRACE_RECURSION \
291 INIT_TASK_RCU_PREEMPT(tsk) \
292 INIT_TASK_RCU_TASKS(tsk) \
293 INIT_CPUSET_SEQ(tsk) \
294 INIT_RT_MUTEXES(tsk) \
295 INIT_PREV_CPUTIME(tsk) \
296 INIT_VTIME(tsk) \
297 INIT_NUMA_BALANCING(tsk) \
298 INIT_KASAN(tsk) \
299 INIT_LIVEPATCH(tsk) \
300 INIT_TASK_SECURITY \
301}
302
303
304/* Attach to the init_task data structure for proper alignment */
305#define __init_task_data __attribute__((__section__(".data..init_task")))
306
307
308#endif