af1de95e711ea3d6667b03b0ed82d701da56f02b
[linux-2.6.git] / 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/ipc.h>
9 #include <linux/pid_namespace.h>
10 #include <linux/user_namespace.h>
11 #include <linux/securebits.h>
12 #include <net/net_namespace.h>
13
14 extern struct files_struct init_files;
15 extern struct fs_struct init_fs;
16
17 #define INIT_KIOCTX(name, which_mm) \
18 {                                                       \
19         .users          = ATOMIC_INIT(1),               \
20         .dead           = 0,                            \
21         .mm             = &which_mm,                    \
22         .user_id        = 0,                            \
23         .next           = NULL,                         \
24         .wait           = __WAIT_QUEUE_HEAD_INITIALIZER(name.wait), \
25         .ctx_lock       = __SPIN_LOCK_UNLOCKED(name.ctx_lock), \
26         .reqs_active    = 0U,                           \
27         .max_reqs       = ~0U,                          \
28 }
29
30 #define INIT_MM(name) \
31 {                                                               \
32         .mm_rb          = RB_ROOT,                              \
33         .pgd            = swapper_pg_dir,                       \
34         .mm_users       = ATOMIC_INIT(2),                       \
35         .mm_count       = ATOMIC_INIT(1),                       \
36         .mmap_sem       = __RWSEM_INITIALIZER(name.mmap_sem),   \
37         .page_table_lock =  __SPIN_LOCK_UNLOCKED(name.page_table_lock), \
38         .mmlist         = LIST_HEAD_INIT(name.mmlist),          \
39         .cpu_vm_mask    = CPU_MASK_ALL,                         \
40 }
41
42 #define INIT_SIGNALS(sig) {                                             \
43         .count          = ATOMIC_INIT(1),                               \
44         .wait_chldexit  = __WAIT_QUEUE_HEAD_INITIALIZER(sig.wait_chldexit),\
45         .shared_pending = {                                             \
46                 .list = LIST_HEAD_INIT(sig.shared_pending.list),        \
47                 .signal =  {{0}}},                                      \
48         .posix_timers    = LIST_HEAD_INIT(sig.posix_timers),            \
49         .cpu_timers     = INIT_CPU_TIMERS(sig.cpu_timers),              \
50         .rlim           = INIT_RLIMITS,                                 \
51         .cputimer       = {                                             \
52                 .cputime = INIT_CPUTIME,                                \
53                 .running = 0,                                           \
54                 .lock = __SPIN_LOCK_UNLOCKED(sig.cputimer.lock),        \
55         },                                                              \
56 }
57
58 extern struct nsproxy init_nsproxy;
59 #define INIT_NSPROXY(nsproxy) {                                         \
60         .pid_ns         = &init_pid_ns,                                 \
61         .count          = ATOMIC_INIT(1),                               \
62         .uts_ns         = &init_uts_ns,                                 \
63         .mnt_ns         = NULL,                                         \
64         INIT_NET_NS(net_ns)                                             \
65         INIT_IPC_NS(ipc_ns)                                             \
66 }
67
68 #define INIT_SIGHAND(sighand) {                                         \
69         .count          = ATOMIC_INIT(1),                               \
70         .action         = { { { .sa_handler = NULL, } }, },             \
71         .siglock        = __SPIN_LOCK_UNLOCKED(sighand.siglock),        \
72         .signalfd_wqh   = __WAIT_QUEUE_HEAD_INITIALIZER(sighand.signalfd_wqh),  \
73 }
74
75 extern struct group_info init_groups;
76
77 #define INIT_STRUCT_PID {                                               \
78         .count          = ATOMIC_INIT(1),                               \
79         .tasks          = {                                             \
80                 { .first = &init_task.pids[PIDTYPE_PID].node },         \
81                 { .first = &init_task.pids[PIDTYPE_PGID].node },        \
82                 { .first = &init_task.pids[PIDTYPE_SID].node },         \
83         },                                                              \
84         .rcu            = RCU_HEAD_INIT,                                \
85         .level          = 0,                                            \
86         .numbers        = { {                                           \
87                 .nr             = 0,                                    \
88                 .ns             = &init_pid_ns,                         \
89                 .pid_chain      = { .next = NULL, .pprev = NULL },      \
90         }, }                                                            \
91 }
92
93 #define INIT_PID_LINK(type)                                     \
94 {                                                               \
95         .node = {                                               \
96                 .next = NULL,                                   \
97                 .pprev = &init_struct_pid.tasks[type].first,    \
98         },                                                      \
99         .pid = &init_struct_pid,                                \
100 }
101
102 #ifdef CONFIG_AUDITSYSCALL
103 #define INIT_IDS \
104         .loginuid = -1, \
105         .sessionid = -1,
106 #else
107 #define INIT_IDS
108 #endif
109
110 #ifdef CONFIG_SECURITY_FILE_CAPABILITIES
111 /*
112  * Because of the reduced scope of CAP_SETPCAP when filesystem
113  * capabilities are in effect, it is safe to allow CAP_SETPCAP to
114  * be available in the default configuration.
115  */
116 # define CAP_INIT_BSET  CAP_FULL_SET
117 #else
118 # define CAP_INIT_BSET  CAP_INIT_EFF_SET
119 #endif
120
121 extern struct cred init_cred;
122
123 /*
124  *  INIT_TASK is used to set up the first task table, touch at
125  * your own risk!. Base=0, limit=0x1fffff (=2MB)
126  */
127 #define INIT_TASK(tsk)  \
128 {                                                                       \
129         .state          = 0,                                            \
130         .stack          = &init_thread_info,                            \
131         .usage          = ATOMIC_INIT(2),                               \
132         .flags          = PF_KTHREAD,                                   \
133         .lock_depth     = -1,                                           \
134         .prio           = MAX_PRIO-20,                                  \
135         .static_prio    = MAX_PRIO-20,                                  \
136         .normal_prio    = MAX_PRIO-20,                                  \
137         .policy         = SCHED_NORMAL,                                 \
138         .cpus_allowed   = CPU_MASK_ALL,                                 \
139         .mm             = NULL,                                         \
140         .active_mm      = &init_mm,                                     \
141         .se             = {                                             \
142                 .group_node     = LIST_HEAD_INIT(tsk.se.group_node),    \
143         },                                                              \
144         .rt             = {                                             \
145                 .run_list       = LIST_HEAD_INIT(tsk.rt.run_list),      \
146                 .time_slice     = HZ,                                   \
147                 .nr_cpus_allowed = NR_CPUS,                             \
148         },                                                              \
149         .tasks          = LIST_HEAD_INIT(tsk.tasks),                    \
150         .pushable_tasks = PLIST_NODE_INIT(tsk.pushable_tasks, MAX_PRIO), \
151         .ptraced        = LIST_HEAD_INIT(tsk.ptraced),                  \
152         .ptrace_entry   = LIST_HEAD_INIT(tsk.ptrace_entry),             \
153         .real_parent    = &tsk,                                         \
154         .parent         = &tsk,                                         \
155         .children       = LIST_HEAD_INIT(tsk.children),                 \
156         .sibling        = LIST_HEAD_INIT(tsk.sibling),                  \
157         .group_leader   = &tsk,                                         \
158         .real_cred      = &init_cred,                                   \
159         .cred           = &init_cred,                                   \
160         .cred_exec_mutex =                                              \
161                  __MUTEX_INITIALIZER(tsk.cred_exec_mutex),              \
162         .comm           = "swapper",                                    \
163         .thread         = INIT_THREAD,                                  \
164         .fs             = &init_fs,                                     \
165         .files          = &init_files,                                  \
166         .signal         = &init_signals,                                \
167         .sighand        = &init_sighand,                                \
168         .nsproxy        = &init_nsproxy,                                \
169         .pending        = {                                             \
170                 .list = LIST_HEAD_INIT(tsk.pending.list),               \
171                 .signal = {{0}}},                                       \
172         .blocked        = {{0}},                                        \
173         .alloc_lock     = __SPIN_LOCK_UNLOCKED(tsk.alloc_lock),         \
174         .journal_info   = NULL,                                         \
175         .cpu_timers     = INIT_CPU_TIMERS(tsk.cpu_timers),              \
176         .fs_excl        = ATOMIC_INIT(0),                               \
177         .pi_lock        = __SPIN_LOCK_UNLOCKED(tsk.pi_lock),            \
178         .timer_slack_ns = 50000, /* 50 usec default slack */            \
179         .pids = {                                                       \
180                 [PIDTYPE_PID]  = INIT_PID_LINK(PIDTYPE_PID),            \
181                 [PIDTYPE_PGID] = INIT_PID_LINK(PIDTYPE_PGID),           \
182                 [PIDTYPE_SID]  = INIT_PID_LINK(PIDTYPE_SID),            \
183         },                                                              \
184         .dirties = INIT_PROP_LOCAL_SINGLE(dirties),                     \
185         INIT_IDS                                                        \
186         INIT_TRACE_IRQFLAGS                                             \
187         INIT_LOCKDEP                                                    \
188 }
189
190
191 #define INIT_CPU_TIMERS(cpu_timers)                                     \
192 {                                                                       \
193         LIST_HEAD_INIT(cpu_timers[0]),                                  \
194         LIST_HEAD_INIT(cpu_timers[1]),                                  \
195         LIST_HEAD_INIT(cpu_timers[2]),                                  \
196 }
197
198
199 #endif