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