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 15 #ifdef CONFIG_SMP 16 # define INIT_PUSHABLE_TASKS(tsk) \ 17 .pushable_tasks = PLIST_NODE_INIT(tsk.pushable_tasks, MAX_PRIO), 18 #else 19 # define INIT_PUSHABLE_TASKS(tsk) 20 #endif 21 22 extern struct files_struct init_files; 23 extern struct fs_struct init_fs; 24 25 #ifdef CONFIG_CGROUPS 26 #define INIT_GROUP_RWSEM(sig) \ 27 .group_rwsem = __RWSEM_INITIALIZER(sig.group_rwsem), 28 #else 29 #define INIT_GROUP_RWSEM(sig) 30 #endif 31 32 #ifdef CONFIG_CPUSETS 33 #define INIT_CPUSET_SEQ \ 34 .mems_allowed_seq = SEQCNT_ZERO, 35 #else 36 #define INIT_CPUSET_SEQ 37 #endif 38 39 #define INIT_SIGNALS(sig) { \ 40 .nr_threads = 1, \ 41 .thread_head = LIST_HEAD_INIT(init_task.thread_node), \ 42 .wait_chldexit = __WAIT_QUEUE_HEAD_INITIALIZER(sig.wait_chldexit),\ 43 .shared_pending = { \ 44 .list = LIST_HEAD_INIT(sig.shared_pending.list), \ 45 .signal = {{0}}}, \ 46 .posix_timers = LIST_HEAD_INIT(sig.posix_timers), \ 47 .cpu_timers = INIT_CPU_TIMERS(sig.cpu_timers), \ 48 .rlim = INIT_RLIMITS, \ 49 .cputimer = { \ 50 .cputime = INIT_CPUTIME, \ 51 .running = 0, \ 52 .lock = __RAW_SPIN_LOCK_UNLOCKED(sig.cputimer.lock), \ 53 }, \ 54 .cred_guard_mutex = \ 55 __MUTEX_INITIALIZER(sig.cred_guard_mutex), \ 56 INIT_GROUP_RWSEM(sig) \ 57 } 58 59 extern struct nsproxy init_nsproxy; 60 61 #define INIT_SIGHAND(sighand) { \ 62 .count = ATOMIC_INIT(1), \ 63 .action = { { { .sa_handler = SIG_DFL, } }, }, \ 64 .siglock = __SPIN_LOCK_UNLOCKED(sighand.siglock), \ 65 .signalfd_wqh = __WAIT_QUEUE_HEAD_INITIALIZER(sighand.signalfd_wqh), \ 66 } 67 68 extern struct group_info init_groups; 69 70 #define INIT_STRUCT_PID { \ 71 .count = ATOMIC_INIT(1), \ 72 .tasks = { \ 73 { .first = NULL }, \ 74 { .first = NULL }, \ 75 { .first = NULL }, \ 76 }, \ 77 .level = 0, \ 78 .numbers = { { \ 79 .nr = 0, \ 80 .ns = &init_pid_ns, \ 81 .pid_chain = { .next = NULL, .pprev = NULL }, \ 82 }, } \ 83 } 84 85 #define INIT_PID_LINK(type) \ 86 { \ 87 .node = { \ 88 .next = NULL, \ 89 .pprev = NULL, \ 90 }, \ 91 .pid = &init_struct_pid, \ 92 } 93 94 #ifdef CONFIG_AUDITSYSCALL 95 #define INIT_IDS \ 96 .loginuid = -1, \ 97 .sessionid = -1, 98 #else 99 #define INIT_IDS 100 #endif 101 102 #ifdef CONFIG_RCU_BOOST 103 #define INIT_TASK_RCU_BOOST() \ 104 .rcu_boost_mutex = NULL, 105 #else 106 #define INIT_TASK_RCU_BOOST() 107 #endif 108 #ifdef CONFIG_TREE_PREEMPT_RCU 109 #define INIT_TASK_RCU_TREE_PREEMPT() \ 110 .rcu_blocked_node = NULL, 111 #else 112 #define INIT_TASK_RCU_TREE_PREEMPT(tsk) 113 #endif 114 #ifdef CONFIG_PREEMPT_RCU 115 #define INIT_TASK_RCU_PREEMPT(tsk) \ 116 .rcu_read_lock_nesting = 0, \ 117 .rcu_read_unlock_special = 0, \ 118 .rcu_node_entry = LIST_HEAD_INIT(tsk.rcu_node_entry), \ 119 INIT_TASK_RCU_TREE_PREEMPT() \ 120 INIT_TASK_RCU_BOOST() 121 #else 122 #define INIT_TASK_RCU_PREEMPT(tsk) 123 #endif 124 125 extern struct cred init_cred; 126 127 extern struct task_group root_task_group; 128 129 #ifdef CONFIG_CGROUP_SCHED 130 # define INIT_CGROUP_SCHED(tsk) \ 131 .sched_task_group = &root_task_group, 132 #else 133 # define INIT_CGROUP_SCHED(tsk) 134 #endif 135 136 #ifdef CONFIG_PERF_EVENTS 137 # define INIT_PERF_EVENTS(tsk) \ 138 .perf_event_mutex = \ 139 __MUTEX_INITIALIZER(tsk.perf_event_mutex), \ 140 .perf_event_list = LIST_HEAD_INIT(tsk.perf_event_list), 141 #else 142 # define INIT_PERF_EVENTS(tsk) 143 #endif 144 145 #define INIT_TASK_COMM "swapper" 146 147 /* 148 * INIT_TASK is used to set up the first task table, touch at 149 * your own risk!. Base=0, limit=0x1fffff (=2MB) 150 */ 151 #define INIT_TASK(tsk) \ 152 { \ 153 .state = 0, \ 154 .stack = &init_thread_info, \ 155 .usage = ATOMIC_INIT(2), \ 156 .flags = PF_KTHREAD, \ 157 .prio = MAX_PRIO-20, \ 158 .static_prio = MAX_PRIO-20, \ 159 .normal_prio = MAX_PRIO-20, \ 160 .policy = SCHED_NORMAL, \ 161 .cpus_allowed = CPU_MASK_ALL, \ 162 .mm = NULL, \ 163 .active_mm = &init_mm, \ 164 .se = { \ 165 .group_node = LIST_HEAD_INIT(tsk.se.group_node), \ 166 }, \ 167 .rt = { \ 168 .run_list = LIST_HEAD_INIT(tsk.rt.run_list), \ 169 .time_slice = RR_TIMESLICE, \ 170 .nr_cpus_allowed = NR_CPUS, \ 171 }, \ 172 .tasks = LIST_HEAD_INIT(tsk.tasks), \ 173 INIT_PUSHABLE_TASKS(tsk) \ 174 INIT_CGROUP_SCHED(tsk) \ 175 .ptraced = LIST_HEAD_INIT(tsk.ptraced), \ 176 .ptrace_entry = LIST_HEAD_INIT(tsk.ptrace_entry), \ 177 .real_parent = &tsk, \ 178 .parent = &tsk, \ 179 .children = LIST_HEAD_INIT(tsk.children), \ 180 .sibling = LIST_HEAD_INIT(tsk.sibling), \ 181 .group_leader = &tsk, \ 182 RCU_INIT_POINTER(.real_cred, &init_cred), \ 183 RCU_INIT_POINTER(.cred, &init_cred), \ 184 .comm = INIT_TASK_COMM, \ 185 .thread = INIT_THREAD, \ 186 .fs = &init_fs, \ 187 .files = &init_files, \ 188 .signal = &init_signals, \ 189 .sighand = &init_sighand, \ 190 .nsproxy = &init_nsproxy, \ 191 .pending = { \ 192 .list = LIST_HEAD_INIT(tsk.pending.list), \ 193 .signal = {{0}}}, \ 194 .blocked = {{0}}, \ 195 .alloc_lock = __SPIN_LOCK_UNLOCKED(tsk.alloc_lock), \ 196 .journal_info = NULL, \ 197 .cpu_timers = INIT_CPU_TIMERS(tsk.cpu_timers), \ 198 .pi_lock = __RAW_SPIN_LOCK_UNLOCKED(tsk.pi_lock), \ 199 .timer_slack_ns = 50000, /* 50 usec default slack */ \ 200 .pids = { \ 201 [PIDTYPE_PID] = INIT_PID_LINK(PIDTYPE_PID), \ 202 [PIDTYPE_PGID] = INIT_PID_LINK(PIDTYPE_PGID), \ 203 [PIDTYPE_SID] = INIT_PID_LINK(PIDTYPE_SID), \ 204 }, \ 205 .thread_group = LIST_HEAD_INIT(tsk.thread_group), \ 206 .thread_node = LIST_HEAD_INIT(init_signals.thread_head), \ 207 INIT_IDS \ 208 INIT_PERF_EVENTS(tsk) \ 209 INIT_TRACE_IRQFLAGS \ 210 INIT_LOCKDEP \ 211 INIT_FTRACE_GRAPH \ 212 INIT_TRACE_RECURSION \ 213 INIT_TASK_RCU_PREEMPT(tsk) \ 214 INIT_CPUSET_SEQ \ 215 } 216 217 218 #define INIT_CPU_TIMERS(cpu_timers) \ 219 { \ 220 LIST_HEAD_INIT(cpu_timers[0]), \ 221 LIST_HEAD_INIT(cpu_timers[1]), \ 222 LIST_HEAD_INIT(cpu_timers[2]), \ 223 } 224 225 /* Attach to the init_task data structure for proper alignment */ 226 #define __init_task_data __attribute__((__section__(".data..init_task"))) 227 228 229 #endif 230