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/ftrace.h>
   9 #include <linux/ipc.h>
  10 #include <linux/pid_namespace.h>
  11 #include <linux/user_namespace.h>
  12 #include <linux/securebits.h>
  13 #include <net/net_namespace.h>
  14
  15 extern struct files_struct init_files;
  16 extern struct fs_struct init_fs;
  17
  18 #define INIT_MM(name) \
  19 {                                                               \
  20         .mm_rb          = RB_ROOT,                              \
  21         .pgd            = swapper_pg_dir,                       \
  22         .mm_users       = ATOMIC_INIT(2),                       \
  23         .mm_count       = ATOMIC_INIT(1),                       \
  24         .mmap_sem       = __RWSEM_INITIALIZER(name.mmap_sem),   \
  25         .page_table_lock =  __SPIN_LOCK_UNLOCKED(name.page_table_lock), \
  26         .mmlist         = LIST_HEAD_INIT(name.mmlist),          \
  27         .cpu_vm_mask    = CPU_MASK_ALL,                         \
  28 }
  29
  30 #define INIT_SIGNALS(sig) {                                             \
  31         .count          = ATOMIC_INIT(1),                               \
  32         .wait_chldexit  = __WAIT_QUEUE_HEAD_INITIALIZER(sig.wait_chldexit),\
  33         .shared_pending = {                                             \
  34                 .list = LIST_HEAD_INIT(sig.shared_pending.list),        \
  35                 .signal =  {{0}}},                                      \
  36         .posix_timers    = LIST_HEAD_INIT(sig.posix_timers),            \
  37         .cpu_timers     = INIT_CPU_TIMERS(sig.cpu_timers),              \
  38         .rlim           = INIT_RLIMITS,                                 \
  39         .cputimer       = {                                             \
  40                 .cputime = INIT_CPUTIME,                                \
  41                 .running = 0,                                           \
  42                 .lock = __SPIN_LOCK_UNLOCKED(sig.cputimer.lock),        \
  43         },                                                              \
  44 }
  45
  46 extern struct nsproxy init_nsproxy;
  47 #define INIT_NSPROXY(nsproxy) {                                         \
  48         .pid_ns         = &init_pid_ns,                                 \
  49         .count          = ATOMIC_INIT(1),                               \
  50         .uts_ns         = &init_uts_ns,                                 \
  51         .mnt_ns         = NULL,                                         \
  52         INIT_NET_NS(net_ns)                                             \
  53         INIT_IPC_NS(ipc_ns)                                             \
  54 }
  55
  56 #define INIT_SIGHAND(sighand) {                                         \
  57         .count          = ATOMIC_INIT(1),                               \
  58         .action         = { { { .sa_handler = NULL, } }, },             \
  59         .siglock        = __SPIN_LOCK_UNLOCKED(sighand.siglock),        \
  60         .signalfd_wqh   = __WAIT_QUEUE_HEAD_INITIALIZER(sighand.signalfd_wqh),  \
  61 }
  62
  63 extern struct group_info init_groups;
  64
  65 #define INIT_STRUCT_PID {                                               \
  66         .count          = ATOMIC_INIT(1),                               \
  67         .tasks          = {                                             \
  68                 { .first = &init_task.pids[PIDTYPE_PID].node },         \
  69                 { .first = &init_task.pids[PIDTYPE_PGID].node },        \
  70                 { .first = &init_task.pids[PIDTYPE_SID].node },         \
  71         },                                                              \
  72         .rcu            = RCU_HEAD_INIT,                                \
  73         .level          = 0,                                            \
  74         .numbers        = { {                                           \
  75                 .nr             = 0,                                    \
  76                 .ns             = &init_pid_ns,                         \
  77                 .pid_chain      = { .next = NULL, .pprev = NULL },      \
  78         }, }                                                            \
  79 }
  80
  81 #define INIT_PID_LINK(type)                                     \
  82 {                                                               \
  83         .node = {                                               \
  84                 .next = NULL,                                   \
  85                 .pprev = &init_struct_pid.tasks[type].first,    \
  86         },                                                      \
  87         .pid = &init_struct_pid,                                \
  88 }
  89
  90 #ifdef CONFIG_AUDITSYSCALL
  91 #define INIT_IDS \
  92         .loginuid = -1, \
  93         .sessionid = -1,
  94 #else
  95 #define INIT_IDS
  96 #endif
  97
  98 #ifdef CONFIG_SECURITY_FILE_CAPABILITIES
  99 /*
 100  * Because of the reduced scope of CAP_SETPCAP when filesystem
 101  * capabilities are in effect, it is safe to allow CAP_SETPCAP to
 102  * be available in the default configuration.
 103  */
 104 # define CAP_INIT_BSET  CAP_FULL_SET
 105 #else
 106 # define CAP_INIT_BSET  CAP_INIT_EFF_SET
 107 #endif
 108
 109 extern struct cred init_cred;
 110
 111 /*
 112  *  INIT_TASK is used to set up the first task table, touch at
 113  * your own risk!. Base=0, limit=0x1fffff (=2MB)
 114  */
 115 #define INIT_TASK(tsk)  \
 116 {                                                                       \
 117         .state          = 0,                                            \
 118         .stack          = &init_thread_info,                            \
 119         .usage          = ATOMIC_INIT(2),                               \
 120         .flags          = PF_KTHREAD,                                   \
 121         .lock_depth     = -1,                                           \
 122         .prio           = MAX_PRIO-20,                                  \
 123         .static_prio    = MAX_PRIO-20,                                  \
 124         .normal_prio    = MAX_PRIO-20,                                  \
 125         .policy         = SCHED_NORMAL,                                 \
 126         .cpus_allowed   = CPU_MASK_ALL,                                 \
 127         .mm             = NULL,                                         \
 128         .active_mm      = &init_mm,                                     \
 129         .se             = {                                             \
 130                 .group_node     = LIST_HEAD_INIT(tsk.se.group_node),    \
 131         },                                                              \
 132         .rt             = {                                             \
 133                 .run_list       = LIST_HEAD_INIT(tsk.rt.run_list),      \
 134                 .time_slice     = HZ,                                   \
 135                 .nr_cpus_allowed = NR_CPUS,                             \
 136         },                                                              \
 137         .tasks          = LIST_HEAD_INIT(tsk.tasks),                    \
 138         .pushable_tasks = PLIST_NODE_INIT(tsk.pushable_tasks, MAX_PRIO), \
 139         .ptraced        = LIST_HEAD_INIT(tsk.ptraced),                  \
 140         .ptrace_entry   = LIST_HEAD_INIT(tsk.ptrace_entry),             \
 141         .real_parent    = &tsk,                                         \
 142         .parent         = &tsk,                                         \
 143         .children       = LIST_HEAD_INIT(tsk.children),                 \
 144         .sibling        = LIST_HEAD_INIT(tsk.sibling),                  \
 145         .group_leader   = &tsk,                                         \
 146         .real_cred      = &init_cred,                                   \
 147         .cred           = &init_cred,                                   \
 148         .cred_exec_mutex =                                              \
 149                  __MUTEX_INITIALIZER(tsk.cred_exec_mutex),              \
 150         .comm           = "swapper",                                    \
 151         .thread         = INIT_THREAD,                                  \
 152         .fs             = &init_fs,                                     \
 153         .files          = &init_files,                                  \
 154         .signal         = &init_signals,                                \
 155         .sighand        = &init_sighand,                                \
 156         .nsproxy        = &init_nsproxy,                                \
 157         .pending        = {                                             \
 158                 .list = LIST_HEAD_INIT(tsk.pending.list),               \
 159                 .signal = {{0}}},                                       \
 160         .blocked        = {{0}},                                        \
 161         .alloc_lock     = __SPIN_LOCK_UNLOCKED(tsk.alloc_lock),         \
 162         .journal_info   = NULL,                                         \
 163         .cpu_timers     = INIT_CPU_TIMERS(tsk.cpu_timers),              \
 164         .fs_excl        = ATOMIC_INIT(0),                               \
 165         .pi_lock        = __SPIN_LOCK_UNLOCKED(tsk.pi_lock),            \
 166         .timer_slack_ns = 50000, /* 50 usec default slack */            \
 167         .pids = {                                                       \
 168                 [PIDTYPE_PID]  = INIT_PID_LINK(PIDTYPE_PID),            \
 169                 [PIDTYPE_PGID] = INIT_PID_LINK(PIDTYPE_PGID),           \
 170                 [PIDTYPE_SID]  = INIT_PID_LINK(PIDTYPE_SID),            \
 171         },                                                              \
 172         .dirties = INIT_PROP_LOCAL_SINGLE(dirties),                     \
 173         INIT_IDS                                                        \
 174         INIT_TRACE_IRQFLAGS                                             \
 175         INIT_LOCKDEP                                                    \
 176         INIT_FTRACE_GRAPH                                               \
 177 }
 178
 179
 180 #define INIT_CPU_TIMERS(cpu_timers)                                     \
 181 {                                                                       \
 182         LIST_HEAD_INIT(cpu_timers[0]),                                  \
 183         LIST_HEAD_INIT(cpu_timers[1]),                                  \
 184         LIST_HEAD_INIT(cpu_timers[2]),                                  \
 185 }
 186
 187
 188 #endif