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 <linux/seqlock.h> 14 #include <net/net_namespace.h> 15 #include <linux/sched/rt.h> 16 17 #ifdef CONFIG_SMP 18 # define INIT_PUSHABLE_TASKS(tsk) \ 19 .pushable_tasks = PLIST_NODE_INIT(tsk.pushable_tasks, MAX_PRIO), 20 #else 21 # define INIT_PUSHABLE_TASKS(tsk) 22 #endif 23 24 extern struct files_struct init_files; 25 extern struct fs_struct init_fs; 26 27 #ifdef CONFIG_CGROUPS 28 #define INIT_GROUP_RWSEM(sig) \ 29 .group_rwsem = __RWSEM_INITIALIZER(sig.group_rwsem), 30 #else 31 #define INIT_GROUP_RWSEM(sig) 32 #endif 33 34 #ifdef CONFIG_CPUSETS 35 #define INIT_CPUSET_SEQ \ 36 .mems_allowed_seq = SEQCNT_ZERO, 37 #else 38 #define INIT_CPUSET_SEQ 39 #endif 40 41 #define INIT_SIGNALS(sig) { \ 42 .nr_threads = 1, \ 43 .wait_chldexit = __WAIT_QUEUE_HEAD_INITIALIZER(sig.wait_chldexit),\ 44 .shared_pending = { \ 45 .list = LIST_HEAD_INIT(sig.shared_pending.list), \ 46 .signal = {{0}}}, \ 47 .posix_timers = LIST_HEAD_INIT(sig.posix_timers), \ 48 .cpu_timers = INIT_CPU_TIMERS(sig.cpu_timers), \ 49 .rlim = INIT_RLIMITS, \ 50 .cputimer = { \ 51 .cputime = INIT_CPUTIME, \ 52 .running = 0, \ 53 .lock = __RAW_SPIN_LOCK_UNLOCKED(sig.cputimer.lock), \ 54 }, \ 55 .cred_guard_mutex = \ 56 __MUTEX_INITIALIZER(sig.cred_guard_mutex), \ 57 INIT_GROUP_RWSEM(sig) \ 58 } 59 60 extern struct nsproxy init_nsproxy; 61 62 #define INIT_SIGHAND(sighand) { \ 63 .count = ATOMIC_INIT(1), \ 64 .action = { { { .sa_handler = SIG_DFL, } }, }, \ 65 .siglock = __SPIN_LOCK_UNLOCKED(sighand.siglock), \ 66 .signalfd_wqh = __WAIT_QUEUE_HEAD_INITIALIZER(sighand.signalfd_wqh), \ 67 } 68 69 extern struct group_info init_groups; 70 71 #define INIT_STRUCT_PID { \ 72 .count = ATOMIC_INIT(1), \ 73 .tasks = { \ 74 { .first = NULL }, \ 75 { .first = NULL }, \ 76 { .first = NULL }, \ 77 }, \ 78 .level = 0, \ 79 .numbers = { { \ 80 .nr = 0, \ 81 .ns = &init_pid_ns, \ 82 .pid_chain = { .next = NULL, .pprev = NULL }, \ 83 }, } \ 84 } 85 86 #define INIT_PID_LINK(type) \ 87 { \ 88 .node = { \ 89 .next = NULL, \ 90 .pprev = NULL, \ 91 }, \ 92 .pid = &init_struct_pid, \ 93 } 94 95 #ifdef CONFIG_AUDITSYSCALL 96 #define INIT_IDS \ 97 .loginuid = INVALID_UID, \ 98 .sessionid = -1, 99 #else 100 #define INIT_IDS 101 #endif 102 103 #ifdef CONFIG_RCU_BOOST 104 #define INIT_TASK_RCU_BOOST() \ 105 .rcu_boost_mutex = NULL, 106 #else 107 #define INIT_TASK_RCU_BOOST() 108 #endif 109 #ifdef CONFIG_TREE_PREEMPT_RCU 110 #define INIT_TASK_RCU_TREE_PREEMPT() \ 111 .rcu_blocked_node = NULL, 112 #else 113 #define INIT_TASK_RCU_TREE_PREEMPT(tsk) 114 #endif 115 #ifdef CONFIG_PREEMPT_RCU 116 #define INIT_TASK_RCU_PREEMPT(tsk) \ 117 .rcu_read_lock_nesting = 0, \ 118 .rcu_read_unlock_special = 0, \ 119 .rcu_node_entry = LIST_HEAD_INIT(tsk.rcu_node_entry), \ 120 INIT_TASK_RCU_TREE_PREEMPT() \ 121 INIT_TASK_RCU_BOOST() 122 #else 123 #define INIT_TASK_RCU_PREEMPT(tsk) 124 #endif 125 126 extern struct cred init_cred; 127 128 extern struct task_group root_task_group; 129 130 #ifdef CONFIG_CGROUP_SCHED 131 # define INIT_CGROUP_SCHED(tsk) \ 132 .sched_task_group = &root_task_group, 133 #else 134 # define INIT_CGROUP_SCHED(tsk) 135 #endif 136 137 #ifdef CONFIG_PERF_EVENTS 138 # define INIT_PERF_EVENTS(tsk) \ 139 .perf_event_mutex = \ 140 __MUTEX_INITIALIZER(tsk.perf_event_mutex), \ 141 .perf_event_list = LIST_HEAD_INIT(tsk.perf_event_list), 142 #else 143 # define INIT_PERF_EVENTS(tsk) 144 #endif 145 146 #ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN 147 # define INIT_VTIME(tsk) \ 148 .vtime_seqlock = __SEQLOCK_UNLOCKED(tsk.vtime_seqlock), \ 149 .vtime_snap = 0, \ 150 .vtime_snap_whence = VTIME_SYS, 151 #else 152 # define INIT_VTIME(tsk) 153 #endif 154 155 #define INIT_TASK_COMM "swapper" 156 157 /* 158 * INIT_TASK is used to set up the first task table, touch at 159 * your own risk!. Base=0, limit=0x1fffff (=2MB) 160 */ 161 #define INIT_TASK(tsk) \ 162 { \ 163 .state = 0, \ 164 .stack = &init_thread_info, \ 165 .usage = ATOMIC_INIT(2), \ 166 .flags = PF_KTHREAD, \ 167 .prio = MAX_PRIO-20, \ 168 .static_prio = MAX_PRIO-20, \ 169 .normal_prio = MAX_PRIO-20, \ 170 .policy = SCHED_NORMAL, \ 171 .cpus_allowed = CPU_MASK_ALL, \ 172 .nr_cpus_allowed= NR_CPUS, \ 173 .mm = NULL, \ 174 .active_mm = &init_mm, \ 175 .se = { \ 176 .group_node = LIST_HEAD_INIT(tsk.se.group_node), \ 177 }, \ 178 .rt = { \ 179 .run_list = LIST_HEAD_INIT(tsk.rt.run_list), \ 180 .time_slice = RR_TIMESLICE, \ 181 }, \ 182 .tasks = LIST_HEAD_INIT(tsk.tasks), \ 183 INIT_PUSHABLE_TASKS(tsk) \ 184 INIT_CGROUP_SCHED(tsk) \ 185 .ptraced = LIST_HEAD_INIT(tsk.ptraced), \ 186 .ptrace_entry = LIST_HEAD_INIT(tsk.ptrace_entry), \ 187 .real_parent = &tsk, \ 188 .parent = &tsk, \ 189 .children = LIST_HEAD_INIT(tsk.children), \ 190 .sibling = LIST_HEAD_INIT(tsk.sibling), \ 191 .group_leader = &tsk, \ 192 RCU_POINTER_INITIALIZER(real_cred, &init_cred), \ 193 RCU_POINTER_INITIALIZER(cred, &init_cred), \ 194 .comm = INIT_TASK_COMM, \ 195 .thread = INIT_THREAD, \ 196 .fs = &init_fs, \ 197 .files = &init_files, \ 198 .signal = &init_signals, \ 199 .sighand = &init_sighand, \ 200 .nsproxy = &init_nsproxy, \ 201 .pending = { \ 202 .list = LIST_HEAD_INIT(tsk.pending.list), \ 203 .signal = {{0}}}, \ 204 .blocked = {{0}}, \ 205 .alloc_lock = __SPIN_LOCK_UNLOCKED(tsk.alloc_lock), \ 206 .journal_info = NULL, \ 207 .cpu_timers = INIT_CPU_TIMERS(tsk.cpu_timers), \ 208 .pi_lock = __RAW_SPIN_LOCK_UNLOCKED(tsk.pi_lock), \ 209 .timer_slack_ns = 50000, /* 50 usec default slack */ \ 210 .pids = { \ 211 [PIDTYPE_PID] = INIT_PID_LINK(PIDTYPE_PID), \ 212 [PIDTYPE_PGID] = INIT_PID_LINK(PIDTYPE_PGID), \ 213 [PIDTYPE_SID] = INIT_PID_LINK(PIDTYPE_SID), \ 214 }, \ 215 .thread_group = LIST_HEAD_INIT(tsk.thread_group), \ 216 INIT_IDS \ 217 INIT_PERF_EVENTS(tsk) \ 218 INIT_TRACE_IRQFLAGS \ 219 INIT_LOCKDEP \ 220 INIT_FTRACE_GRAPH \ 221 INIT_TRACE_RECURSION \ 222 INIT_TASK_RCU_PREEMPT(tsk) \ 223 INIT_CPUSET_SEQ \ 224 INIT_VTIME(tsk) \ 225 } 226 227 228 #define INIT_CPU_TIMERS(cpu_timers) \ 229 { \ 230 LIST_HEAD_INIT(cpu_timers[0]), \ 231 LIST_HEAD_INIT(cpu_timers[1]), \ 232 LIST_HEAD_INIT(cpu_timers[2]), \ 233 } 234 235 /* Attach to the init_task data structure for proper alignment */ 236 #define __init_task_data __attribute__((__section__(".data..init_task"))) 237 238 239 #endif 240