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 16 #define INIT_KIOCTX(name, which_mm) \ 17 { \ 18 .users = ATOMIC_INIT(1), \ 19 .dead = 0, \ 20 .mm = &which_mm, \ 21 .user_id = 0, \ 22 .next = NULL, \ 23 .wait = __WAIT_QUEUE_HEAD_INITIALIZER(name.wait), \ 24 .ctx_lock = __SPIN_LOCK_UNLOCKED(name.ctx_lock), \ 25 .reqs_active = 0U, \ 26 .max_reqs = ~0U, \ 27 } 28 29 #define INIT_MM(name) \ 30 { \ 31 .mm_rb = RB_ROOT, \ 32 .pgd = swapper_pg_dir, \ 33 .mm_users = ATOMIC_INIT(2), \ 34 .mm_count = ATOMIC_INIT(1), \ 35 .mmap_sem = __RWSEM_INITIALIZER(name.mmap_sem), \ 36 .page_table_lock = __SPIN_LOCK_UNLOCKED(name.page_table_lock), \ 37 .mmlist = LIST_HEAD_INIT(name.mmlist), \ 38 .cpu_vm_mask = CPU_MASK_ALL, \ 39 } 40 41 #define INIT_SIGNALS(sig) { \ 42 .count = ATOMIC_INIT(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 } 51 52 extern struct nsproxy init_nsproxy; 53 #define INIT_NSPROXY(nsproxy) { \ 54 .pid_ns = &init_pid_ns, \ 55 .count = ATOMIC_INIT(1), \ 56 .uts_ns = &init_uts_ns, \ 57 .mnt_ns = NULL, \ 58 INIT_NET_NS(net_ns) \ 59 INIT_IPC_NS(ipc_ns) \ 60 .user_ns = &init_user_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 /* 117 * INIT_TASK is used to set up the first task table, touch at 118 * your own risk!. Base=0, limit=0x1fffff (=2MB) 119 */ 120 #define INIT_TASK(tsk) \ 121 { \ 122 .state = 0, \ 123 .stack = &init_thread_info, \ 124 .usage = ATOMIC_INIT(2), \ 125 .flags = PF_KTHREAD, \ 126 .lock_depth = -1, \ 127 .prio = MAX_PRIO-20, \ 128 .static_prio = MAX_PRIO-20, \ 129 .normal_prio = MAX_PRIO-20, \ 130 .policy = SCHED_NORMAL, \ 131 .cpus_allowed = CPU_MASK_ALL, \ 132 .mm = NULL, \ 133 .active_mm = &init_mm, \ 134 .se = { \ 135 .group_node = LIST_HEAD_INIT(tsk.se.group_node), \ 136 }, \ 137 .rt = { \ 138 .run_list = LIST_HEAD_INIT(tsk.rt.run_list), \ 139 .time_slice = HZ, \ 140 .nr_cpus_allowed = NR_CPUS, \ 141 }, \ 142 .tasks = LIST_HEAD_INIT(tsk.tasks), \ 143 .ptraced = LIST_HEAD_INIT(tsk.ptraced), \ 144 .ptrace_entry = LIST_HEAD_INIT(tsk.ptrace_entry), \ 145 .real_parent = &tsk, \ 146 .parent = &tsk, \ 147 .children = LIST_HEAD_INIT(tsk.children), \ 148 .sibling = LIST_HEAD_INIT(tsk.sibling), \ 149 .group_leader = &tsk, \ 150 .group_info = &init_groups, \ 151 .cap_effective = CAP_INIT_EFF_SET, \ 152 .cap_inheritable = CAP_INIT_INH_SET, \ 153 .cap_permitted = CAP_FULL_SET, \ 154 .cap_bset = CAP_INIT_BSET, \ 155 .securebits = SECUREBITS_DEFAULT, \ 156 .user = INIT_USER, \ 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_TRACE_IRQFLAGS \ 182 INIT_LOCKDEP \ 183 } 184 185 186 #define INIT_CPU_TIMERS(cpu_timers) \ 187 { \ 188 LIST_HEAD_INIT(cpu_timers[0]), \ 189 LIST_HEAD_INIT(cpu_timers[1]), \ 190 LIST_HEAD_INIT(cpu_timers[2]), \ 191 } 192 193 194 #endif 195