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 <linux/sched/autogroup.h> 16 #include <net/net_namespace.h> 17 #include <linux/sched/rt.h> 18 #include <linux/livepatch.h> 19 #include <linux/mm_types.h> 20 21 #include <asm/thread_info.h> 22 23 #ifdef CONFIG_SMP 24 # define INIT_PUSHABLE_TASKS(tsk) \ 25 .pushable_tasks = PLIST_NODE_INIT(tsk.pushable_tasks, MAX_PRIO), 26 #else 27 # define INIT_PUSHABLE_TASKS(tsk) 28 #endif 29 30 extern struct files_struct init_files; 31 extern struct fs_struct init_fs; 32 33 #ifdef CONFIG_CPUSETS 34 #define INIT_CPUSET_SEQ(tsk) \ 35 .mems_allowed_seq = SEQCNT_ZERO(tsk.mems_allowed_seq), 36 #else 37 #define INIT_CPUSET_SEQ(tsk) 38 #endif 39 40 #ifndef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE 41 #define INIT_PREV_CPUTIME(x) .prev_cputime = { \ 42 .lock = __RAW_SPIN_LOCK_UNLOCKED(x.prev_cputime.lock), \ 43 }, 44 #else 45 #define INIT_PREV_CPUTIME(x) 46 #endif 47 48 #ifdef CONFIG_POSIX_TIMERS 49 #define INIT_POSIX_TIMERS(s) \ 50 .posix_timers = LIST_HEAD_INIT(s.posix_timers), 51 #define INIT_CPU_TIMERS(s) \ 52 .cpu_timers = { \ 53 LIST_HEAD_INIT(s.cpu_timers[0]), \ 54 LIST_HEAD_INIT(s.cpu_timers[1]), \ 55 LIST_HEAD_INIT(s.cpu_timers[2]), \ 56 }, 57 #define INIT_CPUTIMER(s) \ 58 .cputimer = { \ 59 .cputime_atomic = INIT_CPUTIME_ATOMIC, \ 60 .running = false, \ 61 .checking_timer = false, \ 62 }, 63 #else 64 #define INIT_POSIX_TIMERS(s) 65 #define INIT_CPU_TIMERS(s) 66 #define INIT_CPUTIMER(s) 67 #endif 68 69 #define INIT_SIGNALS(sig) { \ 70 .nr_threads = 1, \ 71 .thread_head = LIST_HEAD_INIT(init_task.thread_node), \ 72 .wait_chldexit = __WAIT_QUEUE_HEAD_INITIALIZER(sig.wait_chldexit),\ 73 .shared_pending = { \ 74 .list = LIST_HEAD_INIT(sig.shared_pending.list), \ 75 .signal = {{0}}}, \ 76 INIT_POSIX_TIMERS(sig) \ 77 INIT_CPU_TIMERS(sig) \ 78 .rlim = INIT_RLIMITS, \ 79 INIT_CPUTIMER(sig) \ 80 INIT_PREV_CPUTIME(sig) \ 81 .cred_guard_mutex = \ 82 __MUTEX_INITIALIZER(sig.cred_guard_mutex), \ 83 } 84 85 extern struct nsproxy init_nsproxy; 86 87 #define INIT_SIGHAND(sighand) { \ 88 .count = ATOMIC_INIT(1), \ 89 .action = { { { .sa_handler = SIG_DFL, } }, }, \ 90 .siglock = __SPIN_LOCK_UNLOCKED(sighand.siglock), \ 91 .signalfd_wqh = __WAIT_QUEUE_HEAD_INITIALIZER(sighand.signalfd_wqh), \ 92 } 93 94 extern struct group_info init_groups; 95 96 #define INIT_STRUCT_PID { \ 97 .count = ATOMIC_INIT(1), \ 98 .tasks = { \ 99 { .first = NULL }, \ 100 { .first = NULL }, \ 101 { .first = NULL }, \ 102 }, \ 103 .level = 0, \ 104 .numbers = { { \ 105 .nr = 0, \ 106 .ns = &init_pid_ns, \ 107 .pid_chain = { .next = NULL, .pprev = NULL }, \ 108 }, } \ 109 } 110 111 #define INIT_PID_LINK(type) \ 112 { \ 113 .node = { \ 114 .next = NULL, \ 115 .pprev = NULL, \ 116 }, \ 117 .pid = &init_struct_pid, \ 118 } 119 120 #ifdef CONFIG_AUDITSYSCALL 121 #define INIT_IDS \ 122 .loginuid = INVALID_UID, \ 123 .sessionid = (unsigned int)-1, 124 #else 125 #define INIT_IDS 126 #endif 127 128 #ifdef CONFIG_PREEMPT_RCU 129 #define INIT_TASK_RCU_PREEMPT(tsk) \ 130 .rcu_read_lock_nesting = 0, \ 131 .rcu_read_unlock_special.s = 0, \ 132 .rcu_node_entry = LIST_HEAD_INIT(tsk.rcu_node_entry), \ 133 .rcu_blocked_node = NULL, 134 #else 135 #define INIT_TASK_RCU_PREEMPT(tsk) 136 #endif 137 #ifdef CONFIG_TASKS_RCU 138 #define INIT_TASK_RCU_TASKS(tsk) \ 139 .rcu_tasks_holdout = false, \ 140 .rcu_tasks_holdout_list = \ 141 LIST_HEAD_INIT(tsk.rcu_tasks_holdout_list), \ 142 .rcu_tasks_idle_cpu = -1, 143 #else 144 #define INIT_TASK_RCU_TASKS(tsk) 145 #endif 146 147 extern struct cred init_cred; 148 149 #ifdef CONFIG_CGROUP_SCHED 150 # define INIT_CGROUP_SCHED(tsk) \ 151 .sched_task_group = &root_task_group, 152 #else 153 # define INIT_CGROUP_SCHED(tsk) 154 #endif 155 156 #ifdef CONFIG_PERF_EVENTS 157 # define INIT_PERF_EVENTS(tsk) \ 158 .perf_event_mutex = \ 159 __MUTEX_INITIALIZER(tsk.perf_event_mutex), \ 160 .perf_event_list = LIST_HEAD_INIT(tsk.perf_event_list), 161 #else 162 # define INIT_PERF_EVENTS(tsk) 163 #endif 164 165 #ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN 166 # define INIT_VTIME(tsk) \ 167 .vtime.seqcount = SEQCNT_ZERO(tsk.vtime.seqcount), \ 168 .vtime.starttime = 0, \ 169 .vtime.state = VTIME_SYS, 170 #else 171 # define INIT_VTIME(tsk) 172 #endif 173 174 #define INIT_TASK_COMM "swapper" 175 176 #ifdef CONFIG_RT_MUTEXES 177 # define INIT_RT_MUTEXES(tsk) \ 178 .pi_waiters = RB_ROOT, \ 179 .pi_top_task = NULL, \ 180 .pi_waiters_leftmost = NULL, 181 #else 182 # define INIT_RT_MUTEXES(tsk) 183 #endif 184 185 #ifdef CONFIG_NUMA_BALANCING 186 # define INIT_NUMA_BALANCING(tsk) \ 187 .numa_preferred_nid = -1, \ 188 .numa_group = NULL, \ 189 .numa_faults = NULL, 190 #else 191 # define INIT_NUMA_BALANCING(tsk) 192 #endif 193 194 #ifdef CONFIG_KASAN 195 # define INIT_KASAN(tsk) \ 196 .kasan_depth = 1, 197 #else 198 # define INIT_KASAN(tsk) 199 #endif 200 201 #ifdef CONFIG_LIVEPATCH 202 # define INIT_LIVEPATCH(tsk) \ 203 .patch_state = KLP_UNDEFINED, 204 #else 205 # define INIT_LIVEPATCH(tsk) 206 #endif 207 208 #ifdef CONFIG_THREAD_INFO_IN_TASK 209 # define INIT_TASK_TI(tsk) \ 210 .thread_info = INIT_THREAD_INFO(tsk), \ 211 .stack_refcount = ATOMIC_INIT(1), 212 #else 213 # define INIT_TASK_TI(tsk) 214 #endif 215 216 #ifdef CONFIG_SECURITY 217 #define INIT_TASK_SECURITY .security = NULL, 218 #else 219 #define INIT_TASK_SECURITY 220 #endif 221 222 /* 223 * INIT_TASK is used to set up the first task table, touch at 224 * your own risk!. Base=0, limit=0x1fffff (=2MB) 225 */ 226 #define INIT_TASK(tsk) \ 227 { \ 228 INIT_TASK_TI(tsk) \ 229 .state = 0, \ 230 .stack = init_stack, \ 231 .usage = ATOMIC_INIT(2), \ 232 .flags = PF_KTHREAD, \ 233 .prio = MAX_PRIO-20, \ 234 .static_prio = MAX_PRIO-20, \ 235 .normal_prio = MAX_PRIO-20, \ 236 .policy = SCHED_NORMAL, \ 237 .cpus_allowed = CPU_MASK_ALL, \ 238 .nr_cpus_allowed= NR_CPUS, \ 239 .mm = NULL, \ 240 .active_mm = &init_mm, \ 241 .restart_block = { \ 242 .fn = do_no_restart_syscall, \ 243 }, \ 244 .se = { \ 245 .group_node = LIST_HEAD_INIT(tsk.se.group_node), \ 246 }, \ 247 .rt = { \ 248 .run_list = LIST_HEAD_INIT(tsk.rt.run_list), \ 249 .time_slice = RR_TIMESLICE, \ 250 }, \ 251 .tasks = LIST_HEAD_INIT(tsk.tasks), \ 252 INIT_PUSHABLE_TASKS(tsk) \ 253 INIT_CGROUP_SCHED(tsk) \ 254 .ptraced = LIST_HEAD_INIT(tsk.ptraced), \ 255 .ptrace_entry = LIST_HEAD_INIT(tsk.ptrace_entry), \ 256 .real_parent = &tsk, \ 257 .parent = &tsk, \ 258 .children = LIST_HEAD_INIT(tsk.children), \ 259 .sibling = LIST_HEAD_INIT(tsk.sibling), \ 260 .group_leader = &tsk, \ 261 RCU_POINTER_INITIALIZER(real_cred, &init_cred), \ 262 RCU_POINTER_INITIALIZER(cred, &init_cred), \ 263 .comm = INIT_TASK_COMM, \ 264 .thread = INIT_THREAD, \ 265 .fs = &init_fs, \ 266 .files = &init_files, \ 267 .signal = &init_signals, \ 268 .sighand = &init_sighand, \ 269 .nsproxy = &init_nsproxy, \ 270 .pending = { \ 271 .list = LIST_HEAD_INIT(tsk.pending.list), \ 272 .signal = {{0}}}, \ 273 .blocked = {{0}}, \ 274 .alloc_lock = __SPIN_LOCK_UNLOCKED(tsk.alloc_lock), \ 275 .journal_info = NULL, \ 276 INIT_CPU_TIMERS(tsk) \ 277 .pi_lock = __RAW_SPIN_LOCK_UNLOCKED(tsk.pi_lock), \ 278 .timer_slack_ns = 50000, /* 50 usec default slack */ \ 279 .pids = { \ 280 [PIDTYPE_PID] = INIT_PID_LINK(PIDTYPE_PID), \ 281 [PIDTYPE_PGID] = INIT_PID_LINK(PIDTYPE_PGID), \ 282 [PIDTYPE_SID] = INIT_PID_LINK(PIDTYPE_SID), \ 283 }, \ 284 .thread_group = LIST_HEAD_INIT(tsk.thread_group), \ 285 .thread_node = LIST_HEAD_INIT(init_signals.thread_head), \ 286 INIT_IDS \ 287 INIT_PERF_EVENTS(tsk) \ 288 INIT_TRACE_IRQFLAGS \ 289 INIT_LOCKDEP \ 290 INIT_FTRACE_GRAPH \ 291 INIT_TRACE_RECURSION \ 292 INIT_TASK_RCU_PREEMPT(tsk) \ 293 INIT_TASK_RCU_TASKS(tsk) \ 294 INIT_CPUSET_SEQ(tsk) \ 295 INIT_RT_MUTEXES(tsk) \ 296 INIT_PREV_CPUTIME(tsk) \ 297 INIT_VTIME(tsk) \ 298 INIT_NUMA_BALANCING(tsk) \ 299 INIT_KASAN(tsk) \ 300 INIT_LIVEPATCH(tsk) \ 301 INIT_TASK_SECURITY \ 302 } 303 304 305 /* Attach to the init_task data structure for proper alignment */ 306 #define __init_task_data __attribute__((__section__(".data..init_task"))) 307 308 309 #endif 310