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signal: Clear si_sys_private before copying siginfo to userspace
[cris-mirror.git] / include / linux / init_task.h
blob6a532629c98350fcf8c3d6b4d4ed99a8c58e5cc9
1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _LINUX__INIT_TASK_H
3 #define _LINUX__INIT_TASK_H
4
5 #include <linux/rcupdate.h>
6 #include <linux/irqflags.h>
7 #include <linux/utsname.h>
8 #include <linux/lockdep.h>
9 #include <linux/ftrace.h>
10 #include <linux/ipc.h>
11 #include <linux/pid_namespace.h>
12 #include <linux/user_namespace.h>
13 #include <linux/securebits.h>
14 #include <linux/seqlock.h>
15 #include <linux/rbtree.h>
16 #include <linux/sched/autogroup.h>
17 #include <net/net_namespace.h>
18 #include <linux/sched/rt.h>
19 #include <linux/livepatch.h>
20 #include <linux/mm_types.h>
21
22 #include <asm/thread_info.h>
23
24 #ifdef CONFIG_SMP
25 # define INIT_PUSHABLE_TASKS(tsk) \
26 .pushable_tasks = PLIST_NODE_INIT(tsk.pushable_tasks, MAX_PRIO),
27 #else
28 # define INIT_PUSHABLE_TASKS(tsk)
29 #endif
30
31 extern struct files_struct init_files;
32 extern struct fs_struct init_fs;
33
34 #ifdef CONFIG_CPUSETS
35 #define INIT_CPUSET_SEQ(tsk) \
36 .mems_allowed_seq = SEQCNT_ZERO(tsk.mems_allowed_seq),
37 #else
38 #define INIT_CPUSET_SEQ(tsk)
39 #endif
40
41 #ifndef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
42 #define INIT_PREV_CPUTIME(x) .prev_cputime = { \
43 .lock = __RAW_SPIN_LOCK_UNLOCKED(x.prev_cputime.lock), \
44 },
45 #else
46 #define INIT_PREV_CPUTIME(x)
47 #endif
48
49 #ifdef CONFIG_POSIX_TIMERS
50 #define INIT_POSIX_TIMERS(s) \
51 .posix_timers = LIST_HEAD_INIT(s.posix_timers),
52 #define INIT_CPU_TIMERS(s) \
53 .cpu_timers = { \
54 LIST_HEAD_INIT(s.cpu_timers[0]), \
55 LIST_HEAD_INIT(s.cpu_timers[1]), \
56 LIST_HEAD_INIT(s.cpu_timers[2]), \
57 },
58 #define INIT_CPUTIMER(s) \
59 .cputimer = { \
60 .cputime_atomic = INIT_CPUTIME_ATOMIC, \
61 .running = false, \
62 .checking_timer = false, \
63 },
64 #else
65 #define INIT_POSIX_TIMERS(s)
66 #define INIT_CPU_TIMERS(s)
67 #define INIT_CPUTIMER(s)
68 #endif
69
70 #define INIT_SIGNALS(sig) { \
71 .nr_threads = 1, \
72 .thread_head = LIST_HEAD_INIT(init_task.thread_node), \
73 .wait_chldexit = __WAIT_QUEUE_HEAD_INITIALIZER(sig.wait_chldexit),\
74 .shared_pending = { \
75 .list = LIST_HEAD_INIT(sig.shared_pending.list), \
76 .signal = {{0}}}, \
77 INIT_POSIX_TIMERS(sig) \
78 INIT_CPU_TIMERS(sig) \
79 .rlim = INIT_RLIMITS, \
80 INIT_CPUTIMER(sig) \
81 INIT_PREV_CPUTIME(sig) \
82 .cred_guard_mutex = \
83 __MUTEX_INITIALIZER(sig.cred_guard_mutex), \
84 }
85
86 extern struct nsproxy init_nsproxy;
87
88 #define INIT_SIGHAND(sighand) { \
89 .count = ATOMIC_INIT(1), \
90 .action = { { { .sa_handler = SIG_DFL, } }, }, \
91 .siglock = __SPIN_LOCK_UNLOCKED(sighand.siglock), \
92 .signalfd_wqh = __WAIT_QUEUE_HEAD_INITIALIZER(sighand.signalfd_wqh), \
93 }
94
95 extern struct group_info init_groups;
96
97 #define INIT_STRUCT_PID { \
98 .count = ATOMIC_INIT(1), \
99 .tasks = { \
100 { .first = NULL }, \
101 { .first = NULL }, \
102 { .first = NULL }, \
103 }, \
104 .level = 0, \
105 .numbers = { { \
106 .nr = 0, \
107 .ns = &init_pid_ns, \
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
147 extern 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
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