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 #include <linux/user_namespace.h>
  12 #include <net/net_namespace.h>
  13
  14 #define INIT_FDTABLE \
  15 {                                                       \
  16         .max_fds        = NR_OPEN_DEFAULT,              \
  17         .fd             = &init_files.fd_array[0],      \
  18         .close_on_exec  = (fd_set *)&init_files.close_on_exec_init, \
  19         .open_fds       = (fd_set *)&init_files.open_fds_init,  \
  20         .rcu            = RCU_HEAD_INIT,                \
  21         .next           = NULL,                         \
  22 }
  23
  24 #define INIT_FILES \
  25 {                                                       \
  26         .count          = ATOMIC_INIT(1),               \
  27         .fdt            = &init_files.fdtab,            \
  28         .fdtab          = INIT_FDTABLE,                 \
  29         .file_lock      = __SPIN_LOCK_UNLOCKED(init_task.file_lock), \
  30         .next_fd        = 0,                            \
  31         .close_on_exec_init = { { 0, } },               \
  32         .open_fds_init  = { { 0, } },                   \
  33         .fd_array       = { NULL, }                     \
  34 }
  35
  36 #define INIT_KIOCTX(name, which_mm) \
  37 {                                                       \
  38         .users          = ATOMIC_INIT(1),               \
  39         .dead           = 0,                            \
  40         .mm             = &which_mm,                    \
  41         .user_id        = 0,                            \
  42         .next           = NULL,                         \
  43         .wait           = __WAIT_QUEUE_HEAD_INITIALIZER(name.wait), \
  44         .ctx_lock       = __SPIN_LOCK_UNLOCKED(name.ctx_lock), \
  45         .reqs_active    = 0U,                           \
  46         .max_reqs       = ~0U,                          \
  47 }
  48
  49 #define INIT_MM(name) \
  50 {                                                               \
  51         .mm_rb          = RB_ROOT,                              \
  52         .pgd            = swapper_pg_dir,                       \
  53         .mm_users       = ATOMIC_INIT(2),                       \
  54         .mm_count       = ATOMIC_INIT(1),                       \
  55         .mmap_sem       = __RWSEM_INITIALIZER(name.mmap_sem),   \
  56         .page_table_lock =  __SPIN_LOCK_UNLOCKED(name.page_table_lock), \
  57         .mmlist         = LIST_HEAD_INIT(name.mmlist),          \
  58         .cpu_vm_mask    = CPU_MASK_ALL,                         \
  59 }
  60
  61 #define INIT_SIGNALS(sig) {                                             \
  62         .count          = ATOMIC_INIT(1),                               \
  63         .wait_chldexit  = __WAIT_QUEUE_HEAD_INITIALIZER(sig.wait_chldexit),\
  64         .shared_pending = {                                             \
  65                 .list = LIST_HEAD_INIT(sig.shared_pending.list),        \
  66                 .signal =  {{0}}},                                      \
  67         .posix_timers    = LIST_HEAD_INIT(sig.posix_timers),            \
  68         .cpu_timers     = INIT_CPU_TIMERS(sig.cpu_timers),              \
  69         .rlim           = INIT_RLIMITS,                                 \
  70 }
  71
  72 extern struct nsproxy init_nsproxy;
  73 #define INIT_NSPROXY(nsproxy) {                                         \
  74         .pid_ns         = &init_pid_ns,                                 \
  75         .count          = ATOMIC_INIT(1),                               \
  76         .uts_ns         = &init_uts_ns,                                 \
  77         .mnt_ns         = NULL,                                         \
  78         INIT_NET_NS(net_ns)                                             \
  79         INIT_IPC_NS(ipc_ns)                                             \
  80         .user_ns        = &init_user_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_wqh   = __WAIT_QUEUE_HEAD_INITIALIZER(sighand.signalfd_wqh),  \
  88 }
  89
  90 extern struct group_info init_groups;
  91
  92 #define INIT_STRUCT_PID {                                               \
  93         .count          = ATOMIC_INIT(1),                               \
  94         .tasks          = {                                             \
  95                 { .first = &init_task.pids[PIDTYPE_PID].node },         \
  96                 { .first = &init_task.pids[PIDTYPE_PGID].node },        \
  97                 { .first = &init_task.pids[PIDTYPE_SID].node },         \
  98         },                                                              \
  99         .rcu            = RCU_HEAD_INIT,                                \
 100         .level          = 0,                                            \
 101         .numbers        = { {                                           \
 102                 .nr             = 0,                                    \
 103                 .ns             = &init_pid_ns,                         \
 104                 .pid_chain      = { .next = NULL, .pprev = NULL },      \
 105         }, }                                                            \
 106 }
 107
 108 #define INIT_PID_LINK(type)                                     \
 109 {                                                               \
 110         .node = {                                               \
 111                 .next = NULL,                                   \
 112                 .pprev = &init_struct_pid.tasks[type].first,    \
 113         },                                                      \
 114         .pid = &init_struct_pid,                                \
 115 }
 116
 117 #ifdef CONFIG_AUDITSYSCALL
 118 #define INIT_IDS \
 119         .loginuid = -1, \
 120         .sessionid = -1,
 121 #else
 122 #define INIT_IDS
 123 #endif
 124
 125 #ifdef CONFIG_SECURITY_FILE_CAPABILITIES
 126 /*
 127  * Because of the reduced scope of CAP_SETPCAP when filesystem
 128  * capabilities are in effect, it is safe to allow CAP_SETPCAP to
 129  * be available in the default configuration.
 130  */
 131 # define CAP_INIT_BSET  CAP_FULL_SET
 132 #else
 133 # define CAP_INIT_BSET  CAP_INIT_EFF_SET
 134 #endif
 135
 136 /*
 137  *  INIT_TASK is used to set up the first task table, touch at
 138  * your own risk!. Base=0, limit=0x1fffff (=2MB)
 139  */
 140 #define INIT_TASK(tsk)  \
 141 {                                                                       \
 142         .state          = 0,                                            \
 143         .stack          = &init_thread_info,                            \
 144         .usage          = ATOMIC_INIT(2),                               \
 145         .flags          = 0,                                            \
 146         .lock_depth     = -1,                                           \
 147         .prio           = MAX_PRIO-20,                                  \
 148         .static_prio    = MAX_PRIO-20,                                  \
 149         .normal_prio    = MAX_PRIO-20,                                  \
 150         .policy         = SCHED_NORMAL,                                 \
 151         .cpus_allowed   = CPU_MASK_ALL,                                 \
 152         .mm             = NULL,                                         \
 153         .active_mm      = &init_mm,                                     \
 154         .rt             = {                                             \
 155                 .run_list       = LIST_HEAD_INIT(tsk.rt.run_list),      \
 156                 .time_slice     = HZ,                                   \
 157                 .nr_cpus_allowed = NR_CPUS,                             \
 158         },                                                              \
 159         .tasks          = LIST_HEAD_INIT(tsk.tasks),                    \
 160         .ptrace_children= LIST_HEAD_INIT(tsk.ptrace_children),          \
 161         .ptrace_list    = LIST_HEAD_INIT(tsk.ptrace_list),              \
 162         .real_parent    = &tsk,                                         \
 163         .parent         = &tsk,                                         \
 164         .children       = LIST_HEAD_INIT(tsk.children),                 \
 165         .sibling        = LIST_HEAD_INIT(tsk.sibling),                  \
 166         .group_leader   = &tsk,                                         \
 167         .group_info     = &init_groups,                                 \
 168         .cap_effective  = CAP_INIT_EFF_SET,                             \
 169         .cap_inheritable = CAP_INIT_INH_SET,                            \
 170         .cap_permitted  = CAP_FULL_SET,                                 \
 171         .cap_bset       = CAP_INIT_BSET,                                \
 172         .keep_capabilities = 0,                                         \
 173         .user           = INIT_USER,                                    \
 174         .comm           = "swapper",                                    \
 175         .thread         = INIT_THREAD,                                  \
 176         .fs             = &init_fs,                                     \
 177         .files          = &init_files,                                  \
 178         .signal         = &init_signals,                                \
 179         .sighand        = &init_sighand,                                \
 180         .nsproxy        = &init_nsproxy,                                \
 181         .pending        = {                                             \
 182                 .list = LIST_HEAD_INIT(tsk.pending.list),               \
 183                 .signal = {{0}}},                                       \
 184         .blocked        = {{0}},                                        \
 185         .alloc_lock     = __SPIN_LOCK_UNLOCKED(tsk.alloc_lock),         \
 186         .journal_info   = NULL,                                         \
 187         .cpu_timers     = INIT_CPU_TIMERS(tsk.cpu_timers),              \
 188         .fs_excl        = ATOMIC_INIT(0),                               \
 189         .pi_lock        = __SPIN_LOCK_UNLOCKED(tsk.pi_lock),            \
 190         .pids = {                                                       \
 191                 [PIDTYPE_PID]  = INIT_PID_LINK(PIDTYPE_PID),            \
 192                 [PIDTYPE_PGID] = INIT_PID_LINK(PIDTYPE_PGID),           \
 193                 [PIDTYPE_SID]  = INIT_PID_LINK(PIDTYPE_SID),            \
 194         },                                                              \
 195         .dirties = INIT_PROP_LOCAL_SINGLE(dirties),                     \
 196         INIT_IDS                                                        \
 197         INIT_TRACE_IRQFLAGS                                             \
 198         INIT_LOCKDEP                                                    \
 199 }
 200
 201
 202 #define INIT_CPU_TIMERS(cpu_timers)                                     \
 203 {                                                                       \
 204         LIST_HEAD_INIT(cpu_timers[0]),                                  \
 205         LIST_HEAD_INIT(cpu_timers[1]),                                  \
 206         LIST_HEAD_INIT(cpu_timers[2]),                                  \
 207 }
 208
 209
 210 #endif