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 #ifdef CONFIG_SECURITY_FILE_CAPABILITIES 87 /* 88 * Because of the reduced scope of CAP_SETPCAP when filesystem 89 * capabilities are in effect, it is safe to allow CAP_SETPCAP to 90 * be available in the default configuration. 91 */ 92 # define CAP_INIT_BSET CAP_FULL_SET 93 #else 94 # define CAP_INIT_BSET CAP_INIT_EFF_SET 95 #endif 96 97 #ifdef CONFIG_TREE_PREEMPT_RCU 98 #define INIT_TASK_RCU_PREEMPT(tsk) \ 99 .rcu_read_lock_nesting = 0, \ 100 .rcu_read_unlock_special = 0, \ 101 .rcu_blocked_node = NULL, \ 102 .rcu_node_entry = LIST_HEAD_INIT(tsk.rcu_node_entry), 103 #else 104 #define INIT_TASK_RCU_PREEMPT(tsk) 105 #endif 106 107 extern struct cred init_cred; 108 109 #ifdef CONFIG_PERF_EVENTS 110 # define INIT_PERF_EVENTS(tsk) \ 111 .perf_event_mutex = \ 112 __MUTEX_INITIALIZER(tsk.perf_event_mutex), \ 113 .perf_event_list = LIST_HEAD_INIT(tsk.perf_event_list), 114 #else 115 # define INIT_PERF_EVENTS(tsk) 116 #endif 117 118 /* 119 * INIT_TASK is used to set up the first task table, touch at 120 * your own risk!. Base=0, limit=0x1fffff (=2MB) 121 */ 122 #define INIT_TASK(tsk) \ 123 { \ 124 .state = 0, \ 125 .stack = &init_thread_info, \ 126 .usage = ATOMIC_INIT(2), \ 127 .flags = PF_KTHREAD, \ 128 .lock_depth = -1, \ 129 .prio = MAX_PRIO-20, \ 130 .static_prio = MAX_PRIO-20, \ 131 .normal_prio = MAX_PRIO-20, \ 132 .policy = SCHED_NORMAL, \ 133 .cpus_allowed = CPU_MASK_ALL, \ 134 .mm = NULL, \ 135 .active_mm = &init_mm, \ 136 .se = { \ 137 .group_node = LIST_HEAD_INIT(tsk.se.group_node), \ 138 }, \ 139 .rt = { \ 140 .run_list = LIST_HEAD_INIT(tsk.rt.run_list), \ 141 .time_slice = HZ, \ 142 .nr_cpus_allowed = NR_CPUS, \ 143 }, \ 144 .tasks = LIST_HEAD_INIT(tsk.tasks), \ 145 .pushable_tasks = PLIST_NODE_INIT(tsk.pushable_tasks, MAX_PRIO), \ 146 .ptraced = LIST_HEAD_INIT(tsk.ptraced), \ 147 .ptrace_entry = LIST_HEAD_INIT(tsk.ptrace_entry), \ 148 .real_parent = &tsk, \ 149 .parent = &tsk, \ 150 .children = LIST_HEAD_INIT(tsk.children), \ 151 .sibling = LIST_HEAD_INIT(tsk.sibling), \ 152 .group_leader = &tsk, \ 153 .real_cred = &init_cred, \ 154 .cred = &init_cred, \ 155 .cred_guard_mutex = \ 156 __MUTEX_INITIALIZER(tsk.cred_guard_mutex), \ 157 .comm = "swapper", \ 158 .thread = INIT_THREAD, \ 159 .fs = &init_fs, \ 160 .files = &init_files, \ 161 .signal = &init_signals, \ 162 .sighand = &init_sighand, \ 163 .nsproxy = &init_nsproxy, \ 164 .pending = { \ 165 .list = LIST_HEAD_INIT(tsk.pending.list), \ 166 .signal = {{0}}}, \ 167 .blocked = {{0}}, \ 168 .alloc_lock = __SPIN_LOCK_UNLOCKED(tsk.alloc_lock), \ 169 .journal_info = NULL, \ 170 .cpu_timers = INIT_CPU_TIMERS(tsk.cpu_timers), \ 171 .fs_excl = ATOMIC_INIT(0), \ 172 .pi_lock = __SPIN_LOCK_UNLOCKED(tsk.pi_lock), \ 173 .timer_slack_ns = 50000, /* 50 usec default slack */ \ 174 .pids = { \ 175 [PIDTYPE_PID] = INIT_PID_LINK(PIDTYPE_PID), \ 176 [PIDTYPE_PGID] = INIT_PID_LINK(PIDTYPE_PGID), \ 177 [PIDTYPE_SID] = INIT_PID_LINK(PIDTYPE_SID), \ 178 }, \ 179 .dirties = INIT_PROP_LOCAL_SINGLE(dirties), \ 180 INIT_IDS \ 181 INIT_PERF_EVENTS(tsk) \ 182 INIT_TRACE_IRQFLAGS \ 183 INIT_LOCKDEP \ 184 INIT_FTRACE_GRAPH \ 185 INIT_TRACE_RECURSION \ 186 INIT_TASK_RCU_PREEMPT(tsk) \ 187 } 188 189 190 #define INIT_CPU_TIMERS(cpu_timers) \ 191 { \ 192 LIST_HEAD_INIT(cpu_timers[0]), \ 193 LIST_HEAD_INIT(cpu_timers[1]), \ 194 LIST_HEAD_INIT(cpu_timers[2]), \ 195 } 196 197 /* Attach to the init_task data structure for proper alignment */ 198 #define __init_task_data __attribute__((__section__(".data.init_task"))) 199 200 201 #endif 202