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 <net/net_namespace.h>
14
15extern struct files_struct init_files;
16extern struct fs_struct init_fs;
17
18#define INIT_SIGNALS(sig) { \
19 .count = ATOMIC_INIT(1), \
20 .wait_chldexit = __WAIT_QUEUE_HEAD_INITIALIZER(sig.wait_chldexit),\
21 .shared_pending = { \
22 .list = LIST_HEAD_INIT(sig.shared_pending.list), \
23 .signal = {{0}}}, \
24 .posix_timers = LIST_HEAD_INIT(sig.posix_timers), \
25 .cpu_timers = INIT_CPU_TIMERS(sig.cpu_timers), \
26 .rlim = INIT_RLIMITS, \
27 .cputimer = { \
28 .cputime = INIT_CPUTIME, \
29 .running = 0, \
30 .lock = __SPIN_LOCK_UNLOCKED(sig.cputimer.lock), \
31 }, \
32}
33
34extern struct nsproxy init_nsproxy;
35#define INIT_NSPROXY(nsproxy) { \
36 .pid_ns = &init_pid_ns, \
37 .count = ATOMIC_INIT(1), \
38 .uts_ns = &init_uts_ns, \
39 .mnt_ns = NULL, \
40 INIT_NET_NS(net_ns) \
41 INIT_IPC_NS(ipc_ns) \
42}
43
44#define INIT_SIGHAND(sighand) { \
45 .count = ATOMIC_INIT(1), \
46 .action = { { { .sa_handler = NULL, } }, }, \
47 .siglock = __SPIN_LOCK_UNLOCKED(sighand.siglock), \
48 .signalfd_wqh = __WAIT_QUEUE_HEAD_INITIALIZER(sighand.signalfd_wqh), \
49}
50
51extern struct group_info init_groups;
52
53#define INIT_STRUCT_PID { \
54 .count = ATOMIC_INIT(1), \
55 .tasks = { \
56 { .first = &init_task.pids[PIDTYPE_PID].node }, \
57 { .first = &init_task.pids[PIDTYPE_PGID].node }, \
58 { .first = &init_task.pids[PIDTYPE_SID].node }, \
59 }, \
60 .rcu = RCU_HEAD_INIT, \
61 .level = 0, \
62 .numbers = { { \
63 .nr = 0, \
64 .ns = &init_pid_ns, \
65 .pid_chain = { .next = NULL, .pprev = NULL }, \
66 }, } \
67}
68
69#define INIT_PID_LINK(type) \
70{ \
71 .node = { \
72 .next = NULL, \
73 .pprev = &init_struct_pid.tasks[type].first, \
74 }, \
75 .pid = &init_struct_pid, \
76}
77
78#ifdef CONFIG_AUDITSYSCALL
79#define INIT_IDS \
80 .loginuid = -1, \
81 .sessionid = -1,
82#else
83#define INIT_IDS
84#endif
85
86/*
87 * Because of the reduced scope of CAP_SETPCAP when filesystem
88 * capabilities are in effect, it is safe to allow CAP_SETPCAP to
89 * be available in the default configuration.
90 */
91# define CAP_INIT_BSET CAP_FULL_SET
92
93#ifdef CONFIG_TREE_PREEMPT_RCU
94#define INIT_TASK_RCU_PREEMPT(tsk) \
95 .rcu_read_lock_nesting = 0, \
96 .rcu_read_unlock_special = 0, \
97 .rcu_blocked_node = NULL, \
98 .rcu_node_entry = LIST_HEAD_INIT(tsk.rcu_node_entry),
99#else
100#define INIT_TASK_RCU_PREEMPT(tsk)
101#endif
102
103extern struct cred init_cred;
104
105#ifdef CONFIG_PERF_EVENTS
106# define INIT_PERF_EVENTS(tsk) \
107 .perf_event_mutex = \
108 __MUTEX_INITIALIZER(tsk.perf_event_mutex), \
109 .perf_event_list = LIST_HEAD_INIT(tsk.perf_event_list),
110#else
111# define INIT_PERF_EVENTS(tsk)
112#endif
113
114/*
115 * INIT_TASK is used to set up the first task table, touch at
116 * your own risk!. Base=0, limit=0x1fffff (=2MB)
117 */
118#define INIT_TASK(tsk) \
119{ \
120 .state = 0, \
121 .stack = &init_thread_info, \
122 .usage = ATOMIC_INIT(2), \
123 .flags = PF_KTHREAD, \
124 .lock_depth = -1, \
125 .prio = MAX_PRIO-20, \
126 .static_prio = MAX_PRIO-20, \
127 .normal_prio = MAX_PRIO-20, \
128 .policy = SCHED_NORMAL, \
129 .cpus_allowed = CPU_MASK_ALL, \
130 .mm = NULL, \
131 .active_mm = &init_mm, \
132 .se = { \
133 .group_node = LIST_HEAD_INIT(tsk.se.group_node), \
134 }, \
135 .rt = { \
136 .run_list = LIST_HEAD_INIT(tsk.rt.run_list), \
137 .time_slice = HZ, \
138 .nr_cpus_allowed = NR_CPUS, \
139 }, \
140 .tasks = LIST_HEAD_INIT(tsk.tasks), \
141 .pushable_tasks = PLIST_NODE_INIT(tsk.pushable_tasks, MAX_PRIO), \
142 .ptraced = LIST_HEAD_INIT(tsk.ptraced), \
143 .ptrace_entry = LIST_HEAD_INIT(tsk.ptrace_entry), \
144 .real_parent = &tsk, \
145 .parent = &tsk, \
146 .children = LIST_HEAD_INIT(tsk.children), \
147 .sibling = LIST_HEAD_INIT(tsk.sibling), \
148 .group_leader = &tsk, \
149 .real_cred = &init_cred, \
150 .cred = &init_cred, \
151 .cred_guard_mutex = \
152 __MUTEX_INITIALIZER(tsk.cred_guard_mutex), \
153 .comm = "swapper", \
154 .thread = INIT_THREAD, \
155 .fs = &init_fs, \
156 .files = &init_files, \
157 .signal = &init_signals, \
158 .sighand = &init_sighand, \
159 .nsproxy = &init_nsproxy, \
160 .pending = { \
161 .list = LIST_HEAD_INIT(tsk.pending.list), \
162 .signal = {{0}}}, \
163 .blocked = {{0}}, \
164 .alloc_lock = __SPIN_LOCK_UNLOCKED(tsk.alloc_lock), \
165 .journal_info = NULL, \
166 .cpu_timers = INIT_CPU_TIMERS(tsk.cpu_timers), \
167 .fs_excl = ATOMIC_INIT(0), \
168 .pi_lock = __RAW_SPIN_LOCK_UNLOCKED(tsk.pi_lock), \
169 .timer_slack_ns = 50000, /* 50 usec default slack */ \
170 .pids = { \
171 [PIDTYPE_PID] = INIT_PID_LINK(PIDTYPE_PID), \
172 [PIDTYPE_PGID] = INIT_PID_LINK(PIDTYPE_PGID), \
173 [PIDTYPE_SID] = INIT_PID_LINK(PIDTYPE_SID), \
174 }, \
175 .dirties = INIT_PROP_LOCAL_SINGLE(dirties), \
176 INIT_IDS \
177 INIT_PERF_EVENTS(tsk) \
178 INIT_TRACE_IRQFLAGS \
179 INIT_LOCKDEP \
180 INIT_FTRACE_GRAPH \
181 INIT_TRACE_RECURSION \
182 INIT_TASK_RCU_PREEMPT(tsk) \
183}
184
185
186#define INIT_CPU_TIMERS(cpu_timers) \
187{ \
188 LIST_HEAD_INIT(cpu_timers[0]), \
189 LIST_HEAD_INIT(cpu_timers[1]), \
190 LIST_HEAD_INIT(cpu_timers[2]), \
191}
192
193/* Attach to the init_task data structure for proper alignment */
194#define __init_task_data __attribute__((__section__(".data.init_task")))
195
196
197#endif