include/linux/init_task.h

   1 #ifndef _LINUX__INIT_TASK_H
   2 #define _LINUX__INIT_TASK_H
   3
   4 #include <linux/file.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
  12 #define INIT_FDTABLE \
  13 {                                                       \
  14         .max_fds        = NR_OPEN_DEFAULT,              \
  15         .fd             = &init_files.fd_array[0],      \
  16         .close_on_exec  = (fd_set *)&init_files.close_on_exec_init, \
  17         .open_fds       = (fd_set *)&init_files.open_fds_init,  \
  18         .rcu            = RCU_HEAD_INIT,                \
  19         .next           = NULL,                         \
  20 }
  21
  22 #define INIT_FILES \
  23 {                                                       \
  24         .count          = ATOMIC_INIT(1),               \
  25         .fdt            = &init_files.fdtab,            \
  26         .fdtab          = INIT_FDTABLE,                 \
  27         .file_lock      = __SPIN_LOCK_UNLOCKED(init_task.file_lock), \
  28         .next_fd        = 0,                            \
  29         .close_on_exec_init = { { 0, } },               \
  30         .open_fds_init  = { { 0, } },                   \
  31         .fd_array       = { NULL, }                     \
  32 }
  33
  34 #define INIT_KIOCTX(name, which_mm) \
  35 {                                                       \
  36         .users          = ATOMIC_INIT(1),               \
  37         .dead           = 0,                            \
  38         .mm             = &which_mm,                    \
  39         .user_id        = 0,                            \
  40         .next           = NULL,                         \
  41         .wait           = __WAIT_QUEUE_HEAD_INITIALIZER(name.wait), \
  42         .ctx_lock       = __SPIN_LOCK_UNLOCKED(name.ctx_lock), \
  43         .reqs_active    = 0U,                           \
  44         .max_reqs       = ~0U,                          \
  45 }
  46
  47 #define INIT_MM(name) \
  48 {                                                               \
  49         .mm_rb          = RB_ROOT,                              \
  50         .pgd            = swapper_pg_dir,                       \
  51         .mm_users       = ATOMIC_INIT(2),                       \
  52         .mm_count       = ATOMIC_INIT(1),                       \
  53         .mmap_sem       = __RWSEM_INITIALIZER(name.mmap_sem),   \
  54         .page_table_lock =  __SPIN_LOCK_UNLOCKED(name.page_table_lock), \
  55         .mmlist         = LIST_HEAD_INIT(name.mmlist),          \
  56         .cpu_vm_mask    = CPU_MASK_ALL,                         \
  57 }
  58
  59 #define INIT_SIGNALS(sig) {                                             \
  60         .count          = ATOMIC_INIT(1),                               \
  61         .wait_chldexit  = __WAIT_QUEUE_HEAD_INITIALIZER(sig.wait_chldexit),\
  62         .shared_pending = {                                             \
  63                 .list = LIST_HEAD_INIT(sig.shared_pending.list),        \
  64                 .signal =  {{0}}},                                      \
  65         .posix_timers    = LIST_HEAD_INIT(sig.posix_timers),            \
  66         .cpu_timers     = INIT_CPU_TIMERS(sig.cpu_timers),              \
  67         .rlim           = INIT_RLIMITS,                                 \
  68         .pgrp           = 0,                                            \
  69         .tty_old_pgrp   = NULL,                                         \
  70         { .__session      = 0},                                         \
  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         .nslock         = __SPIN_LOCK_UNLOCKED(nsproxy.nslock),         \
  78         .uts_ns         = &init_uts_ns,                                 \
  79         .mnt_ns         = NULL,                                         \
  80         INIT_IPC_NS(ipc_ns)                                             \
  81 }
  82
  83 #define INIT_SIGHAND(sighand) {                                         \
  84         .count          = ATOMIC_INIT(1),                               \
  85         .action         = { { { .sa_handler = NULL, } }, },             \
  86         .siglock        = __SPIN_LOCK_UNLOCKED(sighand.siglock),        \
  87         .signalfd_list  = LIST_HEAD_INIT(sighand.signalfd_list),        \
  88 }
  89
  90 extern struct group_info init_groups;
  91
  92 #define INIT_STRUCT_PID {                                               \
  93         .count          = ATOMIC_INIT(1),                               \
  94         .nr             = 0,                                            \
  95         /* Don't put this struct pid in pid_hash */                     \
  96         .pid_chain      = { .next = NULL, .pprev = NULL },              \
  97         .tasks          = {                                             \
  98                 { .first = &init_task.pids[PIDTYPE_PID].node },         \
  99                 { .first = &init_task.pids[PIDTYPE_PGID].node },        \
 100                 { .first = &init_task.pids[PIDTYPE_SID].node },         \
 101         },                                                              \
 102         .rcu            = RCU_HEAD_INIT,                                \
 103 }
 104
 105 #define INIT_PID_LINK(type)                                     \
 106 {                                                               \
 107         .node = {                                               \
 108                 .next = NULL,                                   \
 109                 .pprev = &init_struct_pid.tasks[type].first,    \
 110         },                                                      \
 111         .pid = &init_struct_pid,                                \
 112 }
 113
 114 /*
 115  *  INIT_TASK is used to set up the first task table, touch at
 116  * your own risk!. Base=0, limit=0x1fffff (=2MB)
 117  */
 118 #define INIT_TASK(tsk)  \
 119 {                                                                       \
 120         .state          = 0,                                            \
 121         .stack          = &init_thread_info,                            \
 122         .usage          = ATOMIC_INIT(2),                               \
 123         .flags          = 0,                                            \
 124         .lock_depth     = -1,                                           \
 125         .prio           = MAX_PRIO-20,                                  \
 126         .static_prio    = MAX_PRIO-20,                                  \
 127         .normal_prio    = MAX_PRIO-20,                                  \
 128         .policy         = SCHED_NORMAL,                                 \
 129         .cpus_allowed   = CPU_MASK_ALL,                                 \
 130         .mm             = NULL,                                         \
 131         .active_mm      = &init_mm,                                     \
 132         .run_list       = LIST_HEAD_INIT(tsk.run_list),                 \
 133         .ioprio         = 0,                                            \
 134         .time_slice     = HZ,                                           \
 135         .tasks          = LIST_HEAD_INIT(tsk.tasks),                    \
 136         .ptrace_children= LIST_HEAD_INIT(tsk.ptrace_children),          \
 137         .ptrace_list    = LIST_HEAD_INIT(tsk.ptrace_list),              \
 138         .real_parent    = &tsk,                                         \
 139         .parent         = &tsk,                                         \
 140         .children       = LIST_HEAD_INIT(tsk.children),                 \
 141         .sibling        = LIST_HEAD_INIT(tsk.sibling),                  \
 142         .group_leader   = &tsk,                                         \
 143         .group_info     = &init_groups,                                 \
 144         .cap_effective  = CAP_INIT_EFF_SET,                             \
 145         .cap_inheritable = CAP_INIT_INH_SET,                            \
 146         .cap_permitted  = CAP_FULL_SET,                                 \
 147         .keep_capabilities = 0,                                         \
 148         .user           = INIT_USER,                                    \
 149         .comm           = "swapper",                                    \
 150         .thread         = INIT_THREAD,                                  \
 151         .fs             = &init_fs,                                     \
 152         .files          = &init_files,                                  \
 153         .signal         = &init_signals,                                \
 154         .sighand        = &init_sighand,                                \
 155         .nsproxy        = &init_nsproxy,                                \
 156         .pending        = {                                             \
 157                 .list = LIST_HEAD_INIT(tsk.pending.list),               \
 158                 .signal = {{0}}},                                       \
 159         .blocked        = {{0}},                                        \
 160         .alloc_lock     = __SPIN_LOCK_UNLOCKED(tsk.alloc_lock),         \
 161         .journal_info   = NULL,                                         \
 162         .cpu_timers     = INIT_CPU_TIMERS(tsk.cpu_timers),              \
 163         .fs_excl        = ATOMIC_INIT(0),                               \
 164         .pi_lock        = __SPIN_LOCK_UNLOCKED(tsk.pi_lock),            \
 165         .pids = {                                                       \
 166                 [PIDTYPE_PID]  = INIT_PID_LINK(PIDTYPE_PID),            \
 167                 [PIDTYPE_PGID] = INIT_PID_LINK(PIDTYPE_PGID),           \
 168                 [PIDTYPE_SID]  = INIT_PID_LINK(PIDTYPE_SID),            \
 169         },                                                              \
 170         INIT_TRACE_IRQFLAGS                                             \
 171         INIT_LOCKDEP                                                    \
 172 }
 173
 174
 175 #define INIT_CPU_TIMERS(cpu_timers)                                     \
 176 {                                                                       \
 177         LIST_HEAD_INIT(cpu_timers[0]),                                  \
 178         LIST_HEAD_INIT(cpu_timers[1]),                                  \
 179         LIST_HEAD_INIT(cpu_timers[2]),                                  \
 180 }
 181
 182
 183 #endif