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/ipc.h> 9 #include <linux/pid_namespace.h> 10 #include <linux/user_namespace.h> 11 #include <linux/securebits.h> 12 #include <net/net_namespace.h> 13 14 extern struct files_struct init_files; 15 extern struct fs_struct init_fs; 16 17 #define INIT_KIOCTX(name, which_mm) \ 18 { \ 19 .users = ATOMIC_INIT(1), \ 20 .dead = 0, \ 21 .mm = &which_mm, \ 22 .user_id = 0, \ 23 .next = NULL, \ 24 .wait = __WAIT_QUEUE_HEAD_INITIALIZER(name.wait), \ 25 .ctx_lock = __SPIN_LOCK_UNLOCKED(name.ctx_lock), \ 26 .reqs_active = 0U, \ 27 .max_reqs = ~0U, \ 28 } 29 30 #define INIT_MM(name) \ 31 { \ 32 .mm_rb = RB_ROOT, \ 33 .pgd = swapper_pg_dir, \ 34 .mm_users = ATOMIC_INIT(2), \ 35 .mm_count = ATOMIC_INIT(1), \ 36 .mmap_sem = __RWSEM_INITIALIZER(name.mmap_sem), \ 37 .page_table_lock = __SPIN_LOCK_UNLOCKED(name.page_table_lock), \ 38 .mmlist = LIST_HEAD_INIT(name.mmlist), \ 39 .cpu_vm_mask = CPU_MASK_ALL, \ 40 } 41 42 #define INIT_SIGNALS(sig) { \ 43 .count = ATOMIC_INIT(1), \ 44 .wait_chldexit = __WAIT_QUEUE_HEAD_INITIALIZER(sig.wait_chldexit),\ 45 .shared_pending = { \ 46 .list = LIST_HEAD_INIT(sig.shared_pending.list), \ 47 .signal = {{0}}}, \ 48 .posix_timers = LIST_HEAD_INIT(sig.posix_timers), \ 49 .cpu_timers = INIT_CPU_TIMERS(sig.cpu_timers), \ 50 .rlim = INIT_RLIMITS, \ 51 } 52 53 extern struct nsproxy init_nsproxy; 54 #define INIT_NSPROXY(nsproxy) { \ 55 .pid_ns = &init_pid_ns, \ 56 .count = ATOMIC_INIT(1), \ 57 .uts_ns = &init_uts_ns, \ 58 .mnt_ns = NULL, \ 59 INIT_NET_NS(net_ns) \ 60 INIT_IPC_NS(ipc_ns) \ 61 } 62 63 #define INIT_SIGHAND(sighand) { \ 64 .count = ATOMIC_INIT(1), \ 65 .action = { { { .sa_handler = NULL, } }, }, \ 66 .siglock = __SPIN_LOCK_UNLOCKED(sighand.siglock), \ 67 .signalfd_wqh = __WAIT_QUEUE_HEAD_INITIALIZER(sighand.signalfd_wqh), \ 68 } 69 70 extern struct group_info init_groups; 71 72 #define INIT_STRUCT_PID { \ 73 .count = ATOMIC_INIT(1), \ 74 .tasks = { \ 75 { .first = &init_task.pids[PIDTYPE_PID].node }, \ 76 { .first = &init_task.pids[PIDTYPE_PGID].node }, \ 77 { .first = &init_task.pids[PIDTYPE_SID].node }, \ 78 }, \ 79 .rcu = RCU_HEAD_INIT, \ 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 = &init_struct_pid.tasks[type].first, \ 93 }, \ 94 .pid = &init_struct_pid, \ 95 } 96 97 #ifdef CONFIG_AUDITSYSCALL 98 #define INIT_IDS \ 99 .loginuid = -1, \ 100 .sessionid = -1, 101 #else 102 #define INIT_IDS 103 #endif 104 105 #ifdef CONFIG_SECURITY_FILE_CAPABILITIES 106 /* 107 * Because of the reduced scope of CAP_SETPCAP when filesystem 108 * capabilities are in effect, it is safe to allow CAP_SETPCAP to 109 * be available in the default configuration. 110 */ 111 # define CAP_INIT_BSET CAP_FULL_SET 112 #else 113 # define CAP_INIT_BSET CAP_INIT_EFF_SET 114 #endif 115 116 extern struct cred init_cred; 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 .ptraced = LIST_HEAD_INIT(tsk.ptraced), \ 146 .ptrace_entry = LIST_HEAD_INIT(tsk.ptrace_entry), \ 147 .real_parent = &tsk, \ 148 .parent = &tsk, \ 149 .children = LIST_HEAD_INIT(tsk.children), \ 150 .sibling = LIST_HEAD_INIT(tsk.sibling), \ 151 .group_leader = &tsk, \ 152 .real_cred = &init_cred, \ 153 .cred = &init_cred, \ 154 .cred_exec_mutex = \ 155 __MUTEX_INITIALIZER(tsk.cred_exec_mutex), \ 156 .comm = "swapper", \ 157 .thread = INIT_THREAD, \ 158 .fs = &init_fs, \ 159 .files = &init_files, \ 160 .signal = &init_signals, \ 161 .sighand = &init_sighand, \ 162 .nsproxy = &init_nsproxy, \ 163 .pending = { \ 164 .list = LIST_HEAD_INIT(tsk.pending.list), \ 165 .signal = {{0}}}, \ 166 .blocked = {{0}}, \ 167 .alloc_lock = __SPIN_LOCK_UNLOCKED(tsk.alloc_lock), \ 168 .journal_info = NULL, \ 169 .cpu_timers = INIT_CPU_TIMERS(tsk.cpu_timers), \ 170 .fs_excl = ATOMIC_INIT(0), \ 171 .pi_lock = __SPIN_LOCK_UNLOCKED(tsk.pi_lock), \ 172 .timer_slack_ns = 50000, /* 50 usec default slack */ \ 173 .pids = { \ 174 [PIDTYPE_PID] = INIT_PID_LINK(PIDTYPE_PID), \ 175 [PIDTYPE_PGID] = INIT_PID_LINK(PIDTYPE_PGID), \ 176 [PIDTYPE_SID] = INIT_PID_LINK(PIDTYPE_SID), \ 177 }, \ 178 .dirties = INIT_PROP_LOCAL_SINGLE(dirties), \ 179 INIT_IDS \ 180 INIT_TRACE_IRQFLAGS \ 181 INIT_LOCKDEP \ 182 } 183 184 185 #define INIT_CPU_TIMERS(cpu_timers) \ 186 { \ 187 LIST_HEAD_INIT(cpu_timers[0]), \ 188 LIST_HEAD_INIT(cpu_timers[1]), \ 189 LIST_HEAD_INIT(cpu_timers[2]), \ 190 } 191 192 193 #endif 194