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