1 #ifndef _LINUX__INIT_TASK_H 2 #define _LINUX__INIT_TASK_H 3 4 #include <linux/fdtable.h> 5 #include <linux/rcupdate.h> 6 #include <linux/irqflags.h> 7 #include <linux/utsname.h> 8 #include <linux/lockdep.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 <net/net_namespace.h> 14 15 #define INIT_FDTABLE \ 16 { \ 17 .max_fds = NR_OPEN_DEFAULT, \ 18 .fd = &init_files.fd_array[0], \ 19 .close_on_exec = (fd_set *)&init_files.close_on_exec_init, \ 20 .open_fds = (fd_set *)&init_files.open_fds_init, \ 21 .rcu = RCU_HEAD_INIT, \ 22 .next = NULL, \ 23 } 24 25 #define INIT_FILES \ 26 { \ 27 .count = ATOMIC_INIT(1), \ 28 .fdt = &init_files.fdtab, \ 29 .fdtab = INIT_FDTABLE, \ 30 .file_lock = __SPIN_LOCK_UNLOCKED(init_task.file_lock), \ 31 .next_fd = 0, \ 32 .close_on_exec_init = { { 0, } }, \ 33 .open_fds_init = { { 0, } }, \ 34 .fd_array = { NULL, } \ 35 } 36 37 #define INIT_KIOCTX(name, which_mm) \ 38 { \ 39 .users = ATOMIC_INIT(1), \ 40 .dead = 0, \ 41 .mm = &which_mm, \ 42 .user_id = 0, \ 43 .next = NULL, \ 44 .wait = __WAIT_QUEUE_HEAD_INITIALIZER(name.wait), \ 45 .ctx_lock = __SPIN_LOCK_UNLOCKED(name.ctx_lock), \ 46 .reqs_active = 0U, \ 47 .max_reqs = ~0U, \ 48 } 49 50 #define INIT_MM(name) \ 51 { \ 52 .mm_rb = RB_ROOT, \ 53 .pgd = swapper_pg_dir, \ 54 .mm_users = ATOMIC_INIT(2), \ 55 .mm_count = ATOMIC_INIT(1), \ 56 .mmap_sem = __RWSEM_INITIALIZER(name.mmap_sem), \ 57 .page_table_lock = __SPIN_LOCK_UNLOCKED(name.page_table_lock), \ 58 .mmlist = LIST_HEAD_INIT(name.mmlist), \ 59 .cpu_vm_mask = CPU_MASK_ALL, \ 60 } 61 62 #define INIT_SIGNALS(sig) { \ 63 .count = ATOMIC_INIT(1), \ 64 .wait_chldexit = __WAIT_QUEUE_HEAD_INITIALIZER(sig.wait_chldexit),\ 65 .shared_pending = { \ 66 .list = LIST_HEAD_INIT(sig.shared_pending.list), \ 67 .signal = {{0}}}, \ 68 .posix_timers = LIST_HEAD_INIT(sig.posix_timers), \ 69 .cpu_timers = INIT_CPU_TIMERS(sig.cpu_timers), \ 70 .rlim = INIT_RLIMITS, \ 71 } 72 73 extern struct nsproxy init_nsproxy; 74 #define INIT_NSPROXY(nsproxy) { \ 75 .pid_ns = &init_pid_ns, \ 76 .count = ATOMIC_INIT(1), \ 77 .uts_ns = &init_uts_ns, \ 78 .mnt_ns = NULL, \ 79 INIT_NET_NS(net_ns) \ 80 INIT_IPC_NS(ipc_ns) \ 81 .user_ns = &init_user_ns, \ 82 } 83 84 #define INIT_SIGHAND(sighand) { \ 85 .count = ATOMIC_INIT(1), \ 86 .action = { { { .sa_handler = NULL, } }, }, \ 87 .siglock = __SPIN_LOCK_UNLOCKED(sighand.siglock), \ 88 .signalfd_wqh = __WAIT_QUEUE_HEAD_INITIALIZER(sighand.signalfd_wqh), \ 89 } 90 91 extern struct group_info init_groups; 92 93 #define INIT_STRUCT_PID { \ 94 .count = ATOMIC_INIT(1), \ 95 .tasks = { \ 96 { .first = &init_task.pids[PIDTYPE_PID].node }, \ 97 { .first = &init_task.pids[PIDTYPE_PGID].node }, \ 98 { .first = &init_task.pids[PIDTYPE_SID].node }, \ 99 }, \ 100 .rcu = RCU_HEAD_INIT, \ 101 .level = 0, \ 102 .numbers = { { \ 103 .nr = 0, \ 104 .ns = &init_pid_ns, \ 105 .pid_chain = { .next = NULL, .pprev = NULL }, \ 106 }, } \ 107 } 108 109 #define INIT_PID_LINK(type) \ 110 { \ 111 .node = { \ 112 .next = NULL, \ 113 .pprev = &init_struct_pid.tasks[type].first, \ 114 }, \ 115 .pid = &init_struct_pid, \ 116 } 117 118 #ifdef CONFIG_AUDITSYSCALL 119 #define INIT_IDS \ 120 .loginuid = -1, \ 121 .sessionid = -1, 122 #else 123 #define INIT_IDS 124 #endif 125 126 #ifdef CONFIG_SECURITY_FILE_CAPABILITIES 127 /* 128 * Because of the reduced scope of CAP_SETPCAP when filesystem 129 * capabilities are in effect, it is safe to allow CAP_SETPCAP to 130 * be available in the default configuration. 131 */ 132 # define CAP_INIT_BSET CAP_FULL_SET 133 #else 134 # define CAP_INIT_BSET CAP_INIT_EFF_SET 135 #endif 136 137 /* 138 * INIT_TASK is used to set up the first task table, touch at 139 * your own risk!. Base=0, limit=0x1fffff (=2MB) 140 */ 141 #define INIT_TASK(tsk) \ 142 { \ 143 .state = 0, \ 144 .stack = &init_thread_info, \ 145 .usage = ATOMIC_INIT(2), \ 146 .flags = 0, \ 147 .lock_depth = -1, \ 148 .prio = MAX_PRIO-20, \ 149 .static_prio = MAX_PRIO-20, \ 150 .normal_prio = MAX_PRIO-20, \ 151 .policy = SCHED_NORMAL, \ 152 .cpus_allowed = CPU_MASK_ALL, \ 153 .mm = NULL, \ 154 .active_mm = &init_mm, \ 155 .se = { \ 156 .group_node = LIST_HEAD_INIT(tsk.se.group_node), \ 157 }, \ 158 .rt = { \ 159 .run_list = LIST_HEAD_INIT(tsk.rt.run_list), \ 160 .time_slice = HZ, \ 161 .nr_cpus_allowed = NR_CPUS, \ 162 }, \ 163 .tasks = LIST_HEAD_INIT(tsk.tasks), \ 164 .ptrace_children= LIST_HEAD_INIT(tsk.ptrace_children), \ 165 .ptrace_list = LIST_HEAD_INIT(tsk.ptrace_list), \ 166 .real_parent = &tsk, \ 167 .parent = &tsk, \ 168 .children = LIST_HEAD_INIT(tsk.children), \ 169 .sibling = LIST_HEAD_INIT(tsk.sibling), \ 170 .group_leader = &tsk, \ 171 .group_info = &init_groups, \ 172 .cap_effective = CAP_INIT_EFF_SET, \ 173 .cap_inheritable = CAP_INIT_INH_SET, \ 174 .cap_permitted = CAP_FULL_SET, \ 175 .cap_bset = CAP_INIT_BSET, \ 176 .securebits = SECUREBITS_DEFAULT, \ 177 .user = INIT_USER, \ 178 .comm = "swapper", \ 179 .thread = INIT_THREAD, \ 180 .fs = &init_fs, \ 181 .files = &init_files, \ 182 .signal = &init_signals, \ 183 .sighand = &init_sighand, \ 184 .nsproxy = &init_nsproxy, \ 185 .pending = { \ 186 .list = LIST_HEAD_INIT(tsk.pending.list), \ 187 .signal = {{0}}}, \ 188 .blocked = {{0}}, \ 189 .alloc_lock = __SPIN_LOCK_UNLOCKED(tsk.alloc_lock), \ 190 .journal_info = NULL, \ 191 .cpu_timers = INIT_CPU_TIMERS(tsk.cpu_timers), \ 192 .fs_excl = ATOMIC_INIT(0), \ 193 .pi_lock = __SPIN_LOCK_UNLOCKED(tsk.pi_lock), \ 194 .pids = { \ 195 [PIDTYPE_PID] = INIT_PID_LINK(PIDTYPE_PID), \ 196 [PIDTYPE_PGID] = INIT_PID_LINK(PIDTYPE_PGID), \ 197 [PIDTYPE_SID] = INIT_PID_LINK(PIDTYPE_SID), \ 198 }, \ 199 .dirties = INIT_PROP_LOCAL_SINGLE(dirties), \ 200 INIT_IDS \ 201 INIT_TRACE_IRQFLAGS \ 202 INIT_LOCKDEP \ 203 } 204 205 206 #define INIT_CPU_TIMERS(cpu_timers) \ 207 { \ 208 LIST_HEAD_INIT(cpu_timers[0]), \ 209 LIST_HEAD_INIT(cpu_timers[1]), \ 210 LIST_HEAD_INIT(cpu_timers[2]), \ 211 } 212 213 214 #endif 215