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/lockdep.h>
   8
   9 #define INIT_FDTABLE \
  10 {                                                       \
  11         .max_fds        = NR_OPEN_DEFAULT,              \
  12         .max_fdset      = EMBEDDED_FD_SET_SIZE,         \
  13         .fd             = &init_files.fd_array[0],      \
  14         .close_on_exec  = (fd_set *)&init_files.close_on_exec_init, \
  15         .open_fds       = (fd_set *)&init_files.open_fds_init,  \
  16         .rcu            = RCU_HEAD_INIT,                \
  17         .free_files     = NULL,                         \
  18         .next           = NULL,                         \
  19 }
  20
  21 #define INIT_FILES \
  22 {                                                       \
  23         .count          = ATOMIC_INIT(1),               \
  24         .fdt            = &init_files.fdtab,            \
  25         .fdtab          = INIT_FDTABLE,                 \
  26         .file_lock      = __SPIN_LOCK_UNLOCKED(init_task.file_lock), \
  27         .next_fd        = 0,                            \
  28         .close_on_exec_init = { { 0, } },               \
  29         .open_fds_init  = { { 0, } },                   \
  30         .fd_array       = { NULL, }                     \
  31 }
  32
  33 #define INIT_KIOCTX(name, which_mm) \
  34 {                                                       \
  35         .users          = ATOMIC_INIT(1),               \
  36         .dead           = 0,                            \
  37         .mm             = &which_mm,                    \
  38         .user_id        = 0,                            \
  39         .next           = NULL,                         \
  40         .wait           = __WAIT_QUEUE_HEAD_INITIALIZER(name.wait), \
  41         .ctx_lock       = __SPIN_LOCK_UNLOCKED(name.ctx_lock), \
  42         .reqs_active    = 0U,                           \
  43         .max_reqs       = ~0U,                          \
  44 }
  45
  46 #define INIT_MM(name) \
  47 {                                                               \
  48         .mm_rb          = RB_ROOT,                              \
  49         .pgd            = swapper_pg_dir,                       \
  50         .mm_users       = ATOMIC_INIT(2),                       \
  51         .mm_count       = ATOMIC_INIT(1),                       \
  52         .mmap_sem       = __RWSEM_INITIALIZER(name.mmap_sem),   \
  53         .page_table_lock =  __SPIN_LOCK_UNLOCKED(name.page_table_lock), \
  54         .mmlist         = LIST_HEAD_INIT(name.mmlist),          \
  55         .cpu_vm_mask    = CPU_MASK_ALL,                         \
  56 }
  57
  58 #define INIT_SIGNALS(sig) {     \
  59         .count          = ATOMIC_INIT(1),               \
  60         .wait_chldexit  = __WAIT_QUEUE_HEAD_INITIALIZER(sig.wait_chldexit),\
  61         .shared_pending = {                             \
  62                 .list = LIST_HEAD_INIT(sig.shared_pending.list),        \
  63                 .signal =  {{0}}}, \
  64         .posix_timers    = LIST_HEAD_INIT(sig.posix_timers),            \
  65         .cpu_timers     = INIT_CPU_TIMERS(sig.cpu_timers),              \
  66         .rlim           = INIT_RLIMITS,                                 \
  67         .pgrp           = 1,                                            \
  68         .session        = 1,                                            \
  69 }
  70
  71 #define INIT_SIGHAND(sighand) {                                         \
  72         .count          = ATOMIC_INIT(1),                               \
  73         .action         = { { { .sa_handler = NULL, } }, },             \
  74         .siglock        = __SPIN_LOCK_UNLOCKED(sighand.siglock),        \
  75 }
  76
  77 extern struct group_info init_groups;
  78
  79 /*
  80  *  INIT_TASK is used to set up the first task table, touch at
  81  * your own risk!. Base=0, limit=0x1fffff (=2MB)
  82  */
  83 #define INIT_TASK(tsk)  \
  84 {                                                                       \
  85         .state          = 0,                                            \
  86         .thread_info    = &init_thread_info,                            \
  87         .usage          = ATOMIC_INIT(2),                               \
  88         .flags          = 0,                                            \
  89         .lock_depth     = -1,                                           \
  90         .prio           = MAX_PRIO-20,                                  \
  91         .static_prio    = MAX_PRIO-20,                                  \
  92         .normal_prio    = MAX_PRIO-20,                                  \
  93         .policy         = SCHED_NORMAL,                                 \
  94         .cpus_allowed   = CPU_MASK_ALL,                                 \
  95         .mm             = NULL,                                         \
  96         .active_mm      = &init_mm,                                     \
  97         .run_list       = LIST_HEAD_INIT(tsk.run_list),                 \
  98         .ioprio         = 0,                                            \
  99         .time_slice     = HZ,                                           \
 100         .tasks          = LIST_HEAD_INIT(tsk.tasks),                    \
 101         .ptrace_children= LIST_HEAD_INIT(tsk.ptrace_children),          \
 102         .ptrace_list    = LIST_HEAD_INIT(tsk.ptrace_list),              \
 103         .real_parent    = &tsk,                                         \
 104         .parent         = &tsk,                                         \
 105         .children       = LIST_HEAD_INIT(tsk.children),                 \
 106         .sibling        = LIST_HEAD_INIT(tsk.sibling),                  \
 107         .group_leader   = &tsk,                                         \
 108         .group_info     = &init_groups,                                 \
 109         .cap_effective  = CAP_INIT_EFF_SET,                             \
 110         .cap_inheritable = CAP_INIT_INH_SET,                            \
 111         .cap_permitted  = CAP_FULL_SET,                                 \
 112         .keep_capabilities = 0,                                         \
 113         .user           = INIT_USER,                                    \
 114         .comm           = "swapper",                                    \
 115         .thread         = INIT_THREAD,                                  \
 116         .fs             = &init_fs,                                     \
 117         .files          = &init_files,                                  \
 118         .signal         = &init_signals,                                \
 119         .sighand        = &init_sighand,                                \
 120         .pending        = {                                             \
 121                 .list = LIST_HEAD_INIT(tsk.pending.list),               \
 122                 .signal = {{0}}},                                       \
 123         .blocked        = {{0}},                                        \
 124         .alloc_lock     = __SPIN_LOCK_UNLOCKED(tsk.alloc_lock),         \
 125         .journal_info   = NULL,                                         \
 126         .cpu_timers     = INIT_CPU_TIMERS(tsk.cpu_timers),              \
 127         .fs_excl        = ATOMIC_INIT(0),                               \
 128         .pi_lock        = SPIN_LOCK_UNLOCKED,                           \
 129         INIT_TRACE_IRQFLAGS                                             \
 130         INIT_LOCKDEP                                                    \
 131 }
 132
 133
 134 #define INIT_CPU_TIMERS(cpu_timers)                                     \
 135 {                                                                       \
 136         LIST_HEAD_INIT(cpu_timers[0]),                                  \
 137         LIST_HEAD_INIT(cpu_timers[1]),                                  \
 138         LIST_HEAD_INIT(cpu_timers[2]),                                  \
 139 }
 140
 141
 142 #endif