include/linux/init_task.h

   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          = 0,                                            \
 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         .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