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_THREADGROUP_FORK_LOCK(sig) \ 27 .threadgroup_fork_lock = \ 28 __RWSEM_INITIALIZER(sig.threadgroup_fork_lock), 29 #else 30 #define INIT_THREADGROUP_FORK_LOCK(sig) 31 #endif 32 33 #define INIT_SIGNALS(sig) { \ 34 .nr_threads = 1, \ 35 .wait_chldexit = __WAIT_QUEUE_HEAD_INITIALIZER(sig.wait_chldexit),\ 36 .shared_pending = { \ 37 .list = LIST_HEAD_INIT(sig.shared_pending.list), \ 38 .signal = {{0}}}, \ 39 .posix_timers = LIST_HEAD_INIT(sig.posix_timers), \ 40 .cpu_timers = INIT_CPU_TIMERS(sig.cpu_timers), \ 41 .rlim = INIT_RLIMITS, \ 42 .cputimer = { \ 43 .cputime = INIT_CPUTIME, \ 44 .running = 0, \ 45 .lock = __SPIN_LOCK_UNLOCKED(sig.cputimer.lock), \ 46 }, \ 47 .cred_guard_mutex = \ 48 __MUTEX_INITIALIZER(sig.cred_guard_mutex), \ 49 INIT_THREADGROUP_FORK_LOCK(sig) \ 50 } 51 52 extern struct nsproxy init_nsproxy; 53 54 #define INIT_SIGHAND(sighand) { \ 55 .count = ATOMIC_INIT(1), \ 56 .action = { { { .sa_handler = SIG_DFL, } }, }, \ 57 .siglock = __SPIN_LOCK_UNLOCKED(sighand.siglock), \ 58 .signalfd_wqh = __WAIT_QUEUE_HEAD_INITIALIZER(sighand.signalfd_wqh), \ 59 } 60 61 extern struct group_info init_groups; 62 63 #define INIT_STRUCT_PID { \ 64 .count = ATOMIC_INIT(1), \ 65 .tasks = { \ 66 { .first = NULL }, \ 67 { .first = NULL }, \ 68 { .first = NULL }, \ 69 }, \ 70 .level = 0, \ 71 .numbers = { { \ 72 .nr = 0, \ 73 .ns = &init_pid_ns, \ 74 .pid_chain = { .next = NULL, .pprev = NULL }, \ 75 }, } \ 76 } 77 78 #define INIT_PID_LINK(type) \ 79 { \ 80 .node = { \ 81 .next = NULL, \ 82 .pprev = NULL, \ 83 }, \ 84 .pid = &init_struct_pid, \ 85 } 86 87 #ifdef CONFIG_AUDITSYSCALL 88 #define INIT_IDS \ 89 .loginuid = -1, \ 90 .sessionid = -1, 91 #else 92 #define INIT_IDS 93 #endif 94 95 #ifdef CONFIG_RCU_BOOST 96 #define INIT_TASK_RCU_BOOST() \ 97 .rcu_boost_mutex = NULL, 98 #else 99 #define INIT_TASK_RCU_BOOST() 100 #endif 101 #ifdef CONFIG_TREE_PREEMPT_RCU 102 #define INIT_TASK_RCU_TREE_PREEMPT() \ 103 .rcu_blocked_node = NULL, 104 #else 105 #define INIT_TASK_RCU_TREE_PREEMPT(tsk) 106 #endif 107 #ifdef CONFIG_PREEMPT_RCU 108 #define INIT_TASK_RCU_PREEMPT(tsk) \ 109 .rcu_read_lock_nesting = 0, \ 110 .rcu_read_unlock_special = 0, \ 111 .rcu_node_entry = LIST_HEAD_INIT(tsk.rcu_node_entry), \ 112 INIT_TASK_RCU_TREE_PREEMPT() \ 113 INIT_TASK_RCU_BOOST() 114 #else 115 #define INIT_TASK_RCU_PREEMPT(tsk) 116 #endif 117 118 extern struct cred init_cred; 119 120 #ifdef CONFIG_PERF_EVENTS 121 # define INIT_PERF_EVENTS(tsk) \ 122 .perf_event_mutex = \ 123 __MUTEX_INITIALIZER(tsk.perf_event_mutex), \ 124 .perf_event_list = LIST_HEAD_INIT(tsk.perf_event_list), 125 #else 126 # define INIT_PERF_EVENTS(tsk) 127 #endif 128 129 /* 130 * INIT_TASK is used to set up the first task table, touch at 131 * your own risk!. Base=0, limit=0x1fffff (=2MB) 132 */ 133 #define INIT_TASK(tsk) \ 134 { \ 135 .state = 0, \ 136 .stack = &init_thread_info, \ 137 .usage = ATOMIC_INIT(2), \ 138 .flags = PF_KTHREAD, \ 139 .prio = MAX_PRIO-20, \ 140 .static_prio = MAX_PRIO-20, \ 141 .normal_prio = MAX_PRIO-20, \ 142 .policy = SCHED_NORMAL, \ 143 .cpus_allowed = CPU_MASK_ALL, \ 144 .mm = NULL, \ 145 .active_mm = &init_mm, \ 146 .se = { \ 147 .group_node = LIST_HEAD_INIT(tsk.se.group_node), \ 148 }, \ 149 .rt = { \ 150 .run_list = LIST_HEAD_INIT(tsk.rt.run_list), \ 151 .time_slice = HZ, \ 152 .nr_cpus_allowed = NR_CPUS, \ 153 }, \ 154 .tasks = LIST_HEAD_INIT(tsk.tasks), \ 155 INIT_PUSHABLE_TASKS(tsk) \ 156 .ptraced = LIST_HEAD_INIT(tsk.ptraced), \ 157 .ptrace_entry = LIST_HEAD_INIT(tsk.ptrace_entry), \ 158 .real_parent = &tsk, \ 159 .parent = &tsk, \ 160 .children = LIST_HEAD_INIT(tsk.children), \ 161 .sibling = LIST_HEAD_INIT(tsk.sibling), \ 162 .group_leader = &tsk, \ 163 RCU_INIT_POINTER(.real_cred, &init_cred), \ 164 RCU_INIT_POINTER(.cred, &init_cred), \ 165 .comm = "swapper", \ 166 .thread = INIT_THREAD, \ 167 .fs = &init_fs, \ 168 .files = &init_files, \ 169 .signal = &init_signals, \ 170 .sighand = &init_sighand, \ 171 .nsproxy = &init_nsproxy, \ 172 .pending = { \ 173 .list = LIST_HEAD_INIT(tsk.pending.list), \ 174 .signal = {{0}}}, \ 175 .blocked = {{0}}, \ 176 .alloc_lock = __SPIN_LOCK_UNLOCKED(tsk.alloc_lock), \ 177 .journal_info = NULL, \ 178 .cpu_timers = INIT_CPU_TIMERS(tsk.cpu_timers), \ 179 .pi_lock = __RAW_SPIN_LOCK_UNLOCKED(tsk.pi_lock), \ 180 .timer_slack_ns = 50000, /* 50 usec default slack */ \ 181 .pids = { \ 182 [PIDTYPE_PID] = INIT_PID_LINK(PIDTYPE_PID), \ 183 [PIDTYPE_PGID] = INIT_PID_LINK(PIDTYPE_PGID), \ 184 [PIDTYPE_SID] = INIT_PID_LINK(PIDTYPE_SID), \ 185 }, \ 186 .thread_group = LIST_HEAD_INIT(tsk.thread_group), \ 187 .dirties = INIT_PROP_LOCAL_SINGLE(dirties), \ 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