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 extern struct files_struct init_files; 16 extern 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 34 extern 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 51 extern 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 102 103 extern 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 198