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