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 <linux/rbtree.h> 15 #include <net/net_namespace.h> 16 #include <linux/sched/rt.h> 17 18 #ifdef CONFIG_SMP 19 # define INIT_PUSHABLE_TASKS(tsk) \ 20 .pushable_tasks = PLIST_NODE_INIT(tsk.pushable_tasks, MAX_PRIO), 21 #else 22 # define INIT_PUSHABLE_TASKS(tsk) 23 #endif 24 25 extern struct files_struct init_files; 26 extern struct fs_struct init_fs; 27 28 #ifdef CONFIG_CGROUPS 29 #define INIT_GROUP_RWSEM(sig) \ 30 .group_rwsem = __RWSEM_INITIALIZER(sig.group_rwsem), 31 #else 32 #define INIT_GROUP_RWSEM(sig) 33 #endif 34 35 #ifdef CONFIG_CPUSETS 36 #define INIT_CPUSET_SEQ(tsk) \ 37 .mems_allowed_seq = SEQCNT_ZERO(tsk.mems_allowed_seq), 38 #else 39 #define INIT_CPUSET_SEQ(tsk) 40 #endif 41 42 #define INIT_SIGNALS(sig) { \ 43 .nr_threads = 1, \ 44 .thread_head = LIST_HEAD_INIT(init_task.thread_node), \ 45 .wait_chldexit = __WAIT_QUEUE_HEAD_INITIALIZER(sig.wait_chldexit),\ 46 .shared_pending = { \ 47 .list = LIST_HEAD_INIT(sig.shared_pending.list), \ 48 .signal = {{0}}}, \ 49 .posix_timers = LIST_HEAD_INIT(sig.posix_timers), \ 50 .cpu_timers = INIT_CPU_TIMERS(sig.cpu_timers), \ 51 .rlim = INIT_RLIMITS, \ 52 .cputimer = { \ 53 .cputime = INIT_CPUTIME, \ 54 .running = 0, \ 55 .lock = __RAW_SPIN_LOCK_UNLOCKED(sig.cputimer.lock), \ 56 }, \ 57 .cred_guard_mutex = \ 58 __MUTEX_INITIALIZER(sig.cred_guard_mutex), \ 59 INIT_GROUP_RWSEM(sig) \ 60 } 61 62 extern struct nsproxy init_nsproxy; 63 64 #define INIT_SIGHAND(sighand) { \ 65 .count = ATOMIC_INIT(1), \ 66 .action = { { { .sa_handler = SIG_DFL, } }, }, \ 67 .siglock = __SPIN_LOCK_UNLOCKED(sighand.siglock), \ 68 .signalfd_wqh = __WAIT_QUEUE_HEAD_INITIALIZER(sighand.signalfd_wqh), \ 69 } 70 71 extern struct group_info init_groups; 72 73 #define INIT_STRUCT_PID { \ 74 .count = ATOMIC_INIT(1), \ 75 .tasks = { \ 76 { .first = NULL }, \ 77 { .first = NULL }, \ 78 { .first = NULL }, \ 79 }, \ 80 .level = 0, \ 81 .numbers = { { \ 82 .nr = 0, \ 83 .ns = &init_pid_ns, \ 84 .pid_chain = { .next = NULL, .pprev = NULL }, \ 85 }, } \ 86 } 87 88 #define INIT_PID_LINK(type) \ 89 { \ 90 .node = { \ 91 .next = NULL, \ 92 .pprev = NULL, \ 93 }, \ 94 .pid = &init_struct_pid, \ 95 } 96 97 #ifdef CONFIG_AUDITSYSCALL 98 #define INIT_IDS \ 99 .loginuid = INVALID_UID, \ 100 .sessionid = (unsigned int)-1, 101 #else 102 #define INIT_IDS 103 #endif 104 105 #ifdef CONFIG_RCU_BOOST 106 #define INIT_TASK_RCU_BOOST() \ 107 .rcu_boost_mutex = NULL, 108 #else 109 #define INIT_TASK_RCU_BOOST() 110 #endif 111 #ifdef CONFIG_TREE_PREEMPT_RCU 112 #define INIT_TASK_RCU_TREE_PREEMPT() \ 113 .rcu_blocked_node = NULL, 114 #else 115 #define INIT_TASK_RCU_TREE_PREEMPT(tsk) 116 #endif 117 #ifdef CONFIG_PREEMPT_RCU 118 #define INIT_TASK_RCU_PREEMPT(tsk) \ 119 .rcu_read_lock_nesting = 0, \ 120 .rcu_read_unlock_special = 0, \ 121 .rcu_node_entry = LIST_HEAD_INIT(tsk.rcu_node_entry), \ 122 INIT_TASK_RCU_TREE_PREEMPT() \ 123 INIT_TASK_RCU_BOOST() 124 #else 125 #define INIT_TASK_RCU_PREEMPT(tsk) 126 #endif 127 128 extern struct cred init_cred; 129 130 extern struct task_group root_task_group; 131 132 #ifdef CONFIG_CGROUP_SCHED 133 # define INIT_CGROUP_SCHED(tsk) \ 134 .sched_task_group = &root_task_group, 135 #else 136 # define INIT_CGROUP_SCHED(tsk) 137 #endif 138 139 #ifdef CONFIG_PERF_EVENTS 140 # define INIT_PERF_EVENTS(tsk) \ 141 .perf_event_mutex = \ 142 __MUTEX_INITIALIZER(tsk.perf_event_mutex), \ 143 .perf_event_list = LIST_HEAD_INIT(tsk.perf_event_list), 144 #else 145 # define INIT_PERF_EVENTS(tsk) 146 #endif 147 148 #ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN 149 # define INIT_VTIME(tsk) \ 150 .vtime_seqlock = __SEQLOCK_UNLOCKED(tsk.vtime_seqlock), \ 151 .vtime_snap = 0, \ 152 .vtime_snap_whence = VTIME_SYS, 153 #else 154 # define INIT_VTIME(tsk) 155 #endif 156 157 #define INIT_TASK_COMM "swapper" 158 159 #ifdef CONFIG_RT_MUTEXES 160 # define INIT_RT_MUTEXES(tsk) \ 161 .pi_waiters = RB_ROOT, \ 162 .pi_waiters_leftmost = NULL, 163 #else 164 # define INIT_RT_MUTEXES(tsk) 165 #endif 166 167 /* 168 * INIT_TASK is used to set up the first task table, touch at 169 * your own risk!. Base=0, limit=0x1fffff (=2MB) 170 */ 171 #define INIT_TASK(tsk) \ 172 { \ 173 .state = 0, \ 174 .stack = &init_thread_info, \ 175 .usage = ATOMIC_INIT(2), \ 176 .flags = PF_KTHREAD, \ 177 .prio = MAX_PRIO-20, \ 178 .static_prio = MAX_PRIO-20, \ 179 .normal_prio = MAX_PRIO-20, \ 180 .policy = SCHED_NORMAL, \ 181 .cpus_allowed = CPU_MASK_ALL, \ 182 .nr_cpus_allowed= NR_CPUS, \ 183 .mm = NULL, \ 184 .active_mm = &init_mm, \ 185 .se = { \ 186 .group_node = LIST_HEAD_INIT(tsk.se.group_node), \ 187 }, \ 188 .rt = { \ 189 .run_list = LIST_HEAD_INIT(tsk.rt.run_list), \ 190 .time_slice = RR_TIMESLICE, \ 191 }, \ 192 .tasks = LIST_HEAD_INIT(tsk.tasks), \ 193 INIT_PUSHABLE_TASKS(tsk) \ 194 INIT_CGROUP_SCHED(tsk) \ 195 .ptraced = LIST_HEAD_INIT(tsk.ptraced), \ 196 .ptrace_entry = LIST_HEAD_INIT(tsk.ptrace_entry), \ 197 .real_parent = &tsk, \ 198 .parent = &tsk, \ 199 .children = LIST_HEAD_INIT(tsk.children), \ 200 .sibling = LIST_HEAD_INIT(tsk.sibling), \ 201 .group_leader = &tsk, \ 202 RCU_POINTER_INITIALIZER(real_cred, &init_cred), \ 203 RCU_POINTER_INITIALIZER(cred, &init_cred), \ 204 .comm = INIT_TASK_COMM, \ 205 .thread = INIT_THREAD, \ 206 .fs = &init_fs, \ 207 .files = &init_files, \ 208 .signal = &init_signals, \ 209 .sighand = &init_sighand, \ 210 .nsproxy = &init_nsproxy, \ 211 .pending = { \ 212 .list = LIST_HEAD_INIT(tsk.pending.list), \ 213 .signal = {{0}}}, \ 214 .blocked = {{0}}, \ 215 .alloc_lock = __SPIN_LOCK_UNLOCKED(tsk.alloc_lock), \ 216 .journal_info = NULL, \ 217 .cpu_timers = INIT_CPU_TIMERS(tsk.cpu_timers), \ 218 .pi_lock = __RAW_SPIN_LOCK_UNLOCKED(tsk.pi_lock), \ 219 .timer_slack_ns = 50000, /* 50 usec default slack */ \ 220 .pids = { \ 221 [PIDTYPE_PID] = INIT_PID_LINK(PIDTYPE_PID), \ 222 [PIDTYPE_PGID] = INIT_PID_LINK(PIDTYPE_PGID), \ 223 [PIDTYPE_SID] = INIT_PID_LINK(PIDTYPE_SID), \ 224 }, \ 225 .thread_group = LIST_HEAD_INIT(tsk.thread_group), \ 226 .thread_node = LIST_HEAD_INIT(init_signals.thread_head), \ 227 INIT_IDS \ 228 INIT_PERF_EVENTS(tsk) \ 229 INIT_TRACE_IRQFLAGS \ 230 INIT_LOCKDEP \ 231 INIT_FTRACE_GRAPH \ 232 INIT_TRACE_RECURSION \ 233 INIT_TASK_RCU_PREEMPT(tsk) \ 234 INIT_CPUSET_SEQ(tsk) \ 235 INIT_RT_MUTEXES(tsk) \ 236 INIT_VTIME(tsk) \ 237 } 238 239 240 #define INIT_CPU_TIMERS(cpu_timers) \ 241 { \ 242 LIST_HEAD_INIT(cpu_timers[0]), \ 243 LIST_HEAD_INIT(cpu_timers[1]), \ 244 LIST_HEAD_INIT(cpu_timers[2]), \ 245 } 246 247 /* Attach to the init_task data structure for proper alignment */ 248 #define __init_task_data __attribute__((__section__(".data..init_task"))) 249 250 251 #endif 252