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 #define INIT_SIGNALS(sig) { \ 26 .nr_threads = 1, \ 27 .wait_chldexit = __WAIT_QUEUE_HEAD_INITIALIZER(sig.wait_chldexit),\ 28 .shared_pending = { \ 29 .list = LIST_HEAD_INIT(sig.shared_pending.list), \ 30 .signal = {{0}}}, \ 31 .posix_timers = LIST_HEAD_INIT(sig.posix_timers), \ 32 .cpu_timers = INIT_CPU_TIMERS(sig.cpu_timers), \ 33 .rlim = INIT_RLIMITS, \ 34 .cputimer = { \ 35 .cputime = INIT_CPUTIME, \ 36 .running = 0, \ 37 .lock = __SPIN_LOCK_UNLOCKED(sig.cputimer.lock), \ 38 }, \ 39 .cred_guard_mutex = \ 40 __MUTEX_INITIALIZER(sig.cred_guard_mutex), \ 41 } 42 43 extern struct nsproxy init_nsproxy; 44 45 #define INIT_SIGHAND(sighand) { \ 46 .count = ATOMIC_INIT(1), \ 47 .action = { { { .sa_handler = SIG_DFL, } }, }, \ 48 .siglock = __SPIN_LOCK_UNLOCKED(sighand.siglock), \ 49 .signalfd_wqh = __WAIT_QUEUE_HEAD_INITIALIZER(sighand.signalfd_wqh), \ 50 } 51 52 extern struct group_info init_groups; 53 54 #define INIT_STRUCT_PID { \ 55 .count = ATOMIC_INIT(1), \ 56 .tasks = { \ 57 { .first = NULL }, \ 58 { .first = NULL }, \ 59 { .first = NULL }, \ 60 }, \ 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 = NULL, \ 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_RCU_BOOST 94 #define INIT_TASK_RCU_BOOST() \ 95 .rcu_boost_mutex = NULL, 96 #else 97 #define INIT_TASK_RCU_BOOST() 98 #endif 99 #ifdef CONFIG_TREE_PREEMPT_RCU 100 #define INIT_TASK_RCU_TREE_PREEMPT() \ 101 .rcu_blocked_node = NULL, 102 #else 103 #define INIT_TASK_RCU_TREE_PREEMPT(tsk) 104 #endif 105 #ifdef CONFIG_PREEMPT_RCU 106 #define INIT_TASK_RCU_PREEMPT(tsk) \ 107 .rcu_read_lock_nesting = 0, \ 108 .rcu_read_unlock_special = 0, \ 109 .rcu_node_entry = LIST_HEAD_INIT(tsk.rcu_node_entry), \ 110 INIT_TASK_RCU_TREE_PREEMPT() \ 111 INIT_TASK_RCU_BOOST() 112 #else 113 #define INIT_TASK_RCU_PREEMPT(tsk) 114 #endif 115 116 extern struct cred init_cred; 117 118 #ifdef CONFIG_PERF_EVENTS 119 # define INIT_PERF_EVENTS(tsk) \ 120 .perf_event_mutex = \ 121 __MUTEX_INITIALIZER(tsk.perf_event_mutex), \ 122 .perf_event_list = LIST_HEAD_INIT(tsk.perf_event_list), 123 #else 124 # define INIT_PERF_EVENTS(tsk) 125 #endif 126 127 /* 128 * INIT_TASK is used to set up the first task table, touch at 129 * your own risk!. Base=0, limit=0x1fffff (=2MB) 130 */ 131 #define INIT_TASK(tsk) \ 132 { \ 133 .state = 0, \ 134 .stack = &init_thread_info, \ 135 .usage = ATOMIC_INIT(2), \ 136 .flags = PF_KTHREAD, \ 137 .lock_depth = -1, \ 138 .prio = MAX_PRIO-20, \ 139 .static_prio = MAX_PRIO-20, \ 140 .normal_prio = MAX_PRIO-20, \ 141 .policy = SCHED_NORMAL, \ 142 .cpus_allowed = CPU_MASK_ALL, \ 143 .mm = NULL, \ 144 .active_mm = &init_mm, \ 145 .se = { \ 146 .group_node = LIST_HEAD_INIT(tsk.se.group_node), \ 147 }, \ 148 .rt = { \ 149 .run_list = LIST_HEAD_INIT(tsk.rt.run_list), \ 150 .time_slice = HZ, \ 151 .nr_cpus_allowed = NR_CPUS, \ 152 }, \ 153 .tasks = LIST_HEAD_INIT(tsk.tasks), \ 154 INIT_PUSHABLE_TASKS(tsk) \ 155 .ptraced = LIST_HEAD_INIT(tsk.ptraced), \ 156 .ptrace_entry = LIST_HEAD_INIT(tsk.ptrace_entry), \ 157 .real_parent = &tsk, \ 158 .parent = &tsk, \ 159 .children = LIST_HEAD_INIT(tsk.children), \ 160 .sibling = LIST_HEAD_INIT(tsk.sibling), \ 161 .group_leader = &tsk, \ 162 RCU_INIT_POINTER(.real_cred, &init_cred), \ 163 RCU_INIT_POINTER(.cred, &init_cred), \ 164 .comm = "swapper", \ 165 .thread = INIT_THREAD, \ 166 .fs = &init_fs, \ 167 .files = &init_files, \ 168 .signal = &init_signals, \ 169 .sighand = &init_sighand, \ 170 .nsproxy = &init_nsproxy, \ 171 .pending = { \ 172 .list = LIST_HEAD_INIT(tsk.pending.list), \ 173 .signal = {{0}}}, \ 174 .blocked = {{0}}, \ 175 .alloc_lock = __SPIN_LOCK_UNLOCKED(tsk.alloc_lock), \ 176 .journal_info = NULL, \ 177 .cpu_timers = INIT_CPU_TIMERS(tsk.cpu_timers), \ 178 .fs_excl = ATOMIC_INIT(0), \ 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