User namespaces: set of cleanups (v2)
[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
16 #define INIT_KIOCTX(name, which_mm) \
17 {                                                       \
18         .users          = ATOMIC_INIT(1),               \
19         .dead           = 0,                            \
20         .mm             = &which_mm,                    \
21         .user_id        = 0,                            \
22         .next           = NULL,                         \
23         .wait           = __WAIT_QUEUE_HEAD_INITIALIZER(name.wait), \
24         .ctx_lock       = __SPIN_LOCK_UNLOCKED(name.ctx_lock), \
25         .reqs_active    = 0U,                           \
26         .max_reqs       = ~0U,                          \
27 }
28
29 #define INIT_MM(name) \
30 {                                                               \
31         .mm_rb          = RB_ROOT,                              \
32         .pgd            = swapper_pg_dir,                       \
33         .mm_users       = ATOMIC_INIT(2),                       \
34         .mm_count       = ATOMIC_INIT(1),                       \
35         .mmap_sem       = __RWSEM_INITIALIZER(name.mmap_sem),   \
36         .page_table_lock =  __SPIN_LOCK_UNLOCKED(name.page_table_lock), \
37         .mmlist         = LIST_HEAD_INIT(name.mmlist),          \
38         .cpu_vm_mask    = CPU_MASK_ALL,                         \
39 }
40
41 #define INIT_SIGNALS(sig) {                                             \
42         .count          = ATOMIC_INIT(1),                               \
43         .wait_chldexit  = __WAIT_QUEUE_HEAD_INITIALIZER(sig.wait_chldexit),\
44         .shared_pending = {                                             \
45                 .list = LIST_HEAD_INIT(sig.shared_pending.list),        \
46                 .signal =  {{0}}},                                      \
47         .posix_timers    = LIST_HEAD_INIT(sig.posix_timers),            \
48         .cpu_timers     = INIT_CPU_TIMERS(sig.cpu_timers),              \
49         .rlim           = INIT_RLIMITS,                                 \
50 }
51
52 extern struct nsproxy init_nsproxy;
53 #define INIT_NSPROXY(nsproxy) {                                         \
54         .pid_ns         = &init_pid_ns,                                 \
55         .count          = ATOMIC_INIT(1),                               \
56         .uts_ns         = &init_uts_ns,                                 \
57         .mnt_ns         = NULL,                                         \
58         INIT_NET_NS(net_ns)                                             \
59         INIT_IPC_NS(ipc_ns)                                             \
60 }
61
62 #define INIT_SIGHAND(sighand) {                                         \
63         .count          = ATOMIC_INIT(1),                               \
64         .action         = { { { .sa_handler = NULL, } }, },             \
65         .siglock        = __SPIN_LOCK_UNLOCKED(sighand.siglock),        \
66         .signalfd_wqh   = __WAIT_QUEUE_HEAD_INITIALIZER(sighand.signalfd_wqh),  \
67 }
68
69 extern struct group_info init_groups;
70
71 #define INIT_STRUCT_PID {                                               \
72         .count          = ATOMIC_INIT(1),                               \
73         .tasks          = {                                             \
74                 { .first = &init_task.pids[PIDTYPE_PID].node },         \
75                 { .first = &init_task.pids[PIDTYPE_PGID].node },        \
76                 { .first = &init_task.pids[PIDTYPE_SID].node },         \
77         },                                                              \
78         .rcu            = RCU_HEAD_INIT,                                \
79         .level          = 0,                                            \
80         .numbers        = { {                                           \
81                 .nr             = 0,                                    \
82                 .ns             = &init_pid_ns,                         \
83                 .pid_chain      = { .next = NULL, .pprev = NULL },      \
84         }, }                                                            \
85 }
86
87 #define INIT_PID_LINK(type)                                     \
88 {                                                               \
89         .node = {                                               \
90                 .next = NULL,                                   \
91                 .pprev = &init_struct_pid.tasks[type].first,    \
92         },                                                      \
93         .pid = &init_struct_pid,                                \
94 }
95
96 #ifdef CONFIG_AUDITSYSCALL
97 #define INIT_IDS \
98         .loginuid = -1, \
99         .sessionid = -1,
100 #else
101 #define INIT_IDS
102 #endif
103
104 #ifdef CONFIG_SECURITY_FILE_CAPABILITIES
105 /*
106  * Because of the reduced scope of CAP_SETPCAP when filesystem
107  * capabilities are in effect, it is safe to allow CAP_SETPCAP to
108  * be available in the default configuration.
109  */
110 # define CAP_INIT_BSET  CAP_FULL_SET
111 #else
112 # define CAP_INIT_BSET  CAP_INIT_EFF_SET
113 #endif
114
115 extern struct cred init_cred;
116
117 /*
118  *  INIT_TASK is used to set up the first task table, touch at
119  * your own risk!. Base=0, limit=0x1fffff (=2MB)
120  */
121 #define INIT_TASK(tsk)  \
122 {                                                                       \
123         .state          = 0,                                            \
124         .stack          = &init_thread_info,                            \
125         .usage          = ATOMIC_INIT(2),                               \
126         .flags          = PF_KTHREAD,                                   \
127         .lock_depth     = -1,                                           \
128         .prio           = MAX_PRIO-20,                                  \
129         .static_prio    = MAX_PRIO-20,                                  \
130         .normal_prio    = MAX_PRIO-20,                                  \
131         .policy         = SCHED_NORMAL,                                 \
132         .cpus_allowed   = CPU_MASK_ALL,                                 \
133         .mm             = NULL,                                         \
134         .active_mm      = &init_mm,                                     \
135         .se             = {                                             \
136                 .group_node     = LIST_HEAD_INIT(tsk.se.group_node),    \
137         },                                                              \
138         .rt             = {                                             \
139                 .run_list       = LIST_HEAD_INIT(tsk.rt.run_list),      \
140                 .time_slice     = HZ,                                   \
141                 .nr_cpus_allowed = NR_CPUS,                             \
142         },                                                              \
143         .tasks          = LIST_HEAD_INIT(tsk.tasks),                    \
144         .ptraced        = LIST_HEAD_INIT(tsk.ptraced),                  \
145         .ptrace_entry   = LIST_HEAD_INIT(tsk.ptrace_entry),             \
146         .real_parent    = &tsk,                                         \
147         .parent         = &tsk,                                         \
148         .children       = LIST_HEAD_INIT(tsk.children),                 \
149         .sibling        = LIST_HEAD_INIT(tsk.sibling),                  \
150         .group_leader   = &tsk,                                         \
151         .real_cred      = &init_cred,                                   \
152         .cred           = &init_cred,                                   \
153         .cred_exec_mutex =                                              \
154                  __MUTEX_INITIALIZER(tsk.cred_exec_mutex),              \
155         .comm           = "swapper",                                    \
156         .thread         = INIT_THREAD,                                  \
157         .fs             = &init_fs,                                     \
158         .files          = &init_files,                                  \
159         .signal         = &init_signals,                                \
160         .sighand        = &init_sighand,                                \
161         .nsproxy        = &init_nsproxy,                                \
162         .pending        = {                                             \
163                 .list = LIST_HEAD_INIT(tsk.pending.list),               \
164                 .signal = {{0}}},                                       \
165         .blocked        = {{0}},                                        \
166         .alloc_lock     = __SPIN_LOCK_UNLOCKED(tsk.alloc_lock),         \
167         .journal_info   = NULL,                                         \
168         .cpu_timers     = INIT_CPU_TIMERS(tsk.cpu_timers),              \
169         .fs_excl        = ATOMIC_INIT(0),                               \
170         .pi_lock        = __SPIN_LOCK_UNLOCKED(tsk.pi_lock),            \
171         .timer_slack_ns = 50000, /* 50 usec default slack */            \
172         .pids = {                                                       \
173                 [PIDTYPE_PID]  = INIT_PID_LINK(PIDTYPE_PID),            \
174                 [PIDTYPE_PGID] = INIT_PID_LINK(PIDTYPE_PGID),           \
175                 [PIDTYPE_SID]  = INIT_PID_LINK(PIDTYPE_SID),            \
176         },                                                              \
177         .dirties = INIT_PROP_LOCAL_SINGLE(dirties),                     \
178         INIT_IDS                                                        \
179         INIT_TRACE_IRQFLAGS                                             \
180         INIT_LOCKDEP                                                    \
181 }
182
183
184 #define INIT_CPU_TIMERS(cpu_timers)                                     \
185 {                                                                       \
186         LIST_HEAD_INIT(cpu_timers[0]),                                  \
187         LIST_HEAD_INIT(cpu_timers[1]),                                  \
188         LIST_HEAD_INIT(cpu_timers[2]),                                  \
189 }
190
191
192 #endif