user namespace: add the framework
[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/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
13 #define INIT_FDTABLE \
14 {                                                       \
15         .max_fds        = NR_OPEN_DEFAULT,              \
16         .fd             = &init_files.fd_array[0],      \
17         .close_on_exec  = (fd_set *)&init_files.close_on_exec_init, \
18         .open_fds       = (fd_set *)&init_files.open_fds_init,  \
19         .rcu            = RCU_HEAD_INIT,                \
20         .next           = NULL,                         \
21 }
22
23 #define INIT_FILES \
24 {                                                       \
25         .count          = ATOMIC_INIT(1),               \
26         .fdt            = &init_files.fdtab,            \
27         .fdtab          = INIT_FDTABLE,                 \
28         .file_lock      = __SPIN_LOCK_UNLOCKED(init_task.file_lock), \
29         .next_fd        = 0,                            \
30         .close_on_exec_init = { { 0, } },               \
31         .open_fds_init  = { { 0, } },                   \
32         .fd_array       = { NULL, }                     \
33 }
34
35 #define INIT_KIOCTX(name, which_mm) \
36 {                                                       \
37         .users          = ATOMIC_INIT(1),               \
38         .dead           = 0,                            \
39         .mm             = &which_mm,                    \
40         .user_id        = 0,                            \
41         .next           = NULL,                         \
42         .wait           = __WAIT_QUEUE_HEAD_INITIALIZER(name.wait), \
43         .ctx_lock       = __SPIN_LOCK_UNLOCKED(name.ctx_lock), \
44         .reqs_active    = 0U,                           \
45         .max_reqs       = ~0U,                          \
46 }
47
48 #define INIT_MM(name) \
49 {                                                               \
50         .mm_rb          = RB_ROOT,                              \
51         .pgd            = swapper_pg_dir,                       \
52         .mm_users       = ATOMIC_INIT(2),                       \
53         .mm_count       = ATOMIC_INIT(1),                       \
54         .mmap_sem       = __RWSEM_INITIALIZER(name.mmap_sem),   \
55         .page_table_lock =  __SPIN_LOCK_UNLOCKED(name.page_table_lock), \
56         .mmlist         = LIST_HEAD_INIT(name.mmlist),          \
57         .cpu_vm_mask    = CPU_MASK_ALL,                         \
58 }
59
60 #define INIT_SIGNALS(sig) {                                             \
61         .count          = ATOMIC_INIT(1),                               \
62         .wait_chldexit  = __WAIT_QUEUE_HEAD_INITIALIZER(sig.wait_chldexit),\
63         .shared_pending = {                                             \
64                 .list = LIST_HEAD_INIT(sig.shared_pending.list),        \
65                 .signal =  {{0}}},                                      \
66         .posix_timers    = LIST_HEAD_INIT(sig.posix_timers),            \
67         .cpu_timers     = INIT_CPU_TIMERS(sig.cpu_timers),              \
68         .rlim           = INIT_RLIMITS,                                 \
69         .pgrp           = 0,                                            \
70         .tty_old_pgrp   = NULL,                                         \
71         { .__session      = 0},                                         \
72 }
73
74 extern struct nsproxy init_nsproxy;
75 #define INIT_NSPROXY(nsproxy) {                                         \
76         .pid_ns         = &init_pid_ns,                                 \
77         .count          = ATOMIC_INIT(1),                               \
78         .nslock         = __SPIN_LOCK_UNLOCKED(nsproxy.nslock),         \
79         .uts_ns         = &init_uts_ns,                                 \
80         .mnt_ns         = NULL,                                         \
81         INIT_IPC_NS(ipc_ns)                                             \
82         .user_ns        = &init_user_ns,                                \
83 }
84
85 #define INIT_SIGHAND(sighand) {                                         \
86         .count          = ATOMIC_INIT(1),                               \
87         .action         = { { { .sa_handler = NULL, } }, },             \
88         .siglock        = __SPIN_LOCK_UNLOCKED(sighand.siglock),        \
89         .signalfd_list  = LIST_HEAD_INIT(sighand.signalfd_list),        \
90 }
91
92 extern struct group_info init_groups;
93
94 #define INIT_STRUCT_PID {                                               \
95         .count          = ATOMIC_INIT(1),                               \
96         .nr             = 0,                                            \
97         /* Don't put this struct pid in pid_hash */                     \
98         .pid_chain      = { .next = NULL, .pprev = NULL },              \
99         .tasks          = {                                             \
100                 { .first = &init_task.pids[PIDTYPE_PID].node },         \
101                 { .first = &init_task.pids[PIDTYPE_PGID].node },        \
102                 { .first = &init_task.pids[PIDTYPE_SID].node },         \
103         },                                                              \
104         .rcu            = RCU_HEAD_INIT,                                \
105 }
106
107 #define INIT_PID_LINK(type)                                     \
108 {                                                               \
109         .node = {                                               \
110                 .next = NULL,                                   \
111                 .pprev = &init_struct_pid.tasks[type].first,    \
112         },                                                      \
113         .pid = &init_struct_pid,                                \
114 }
115
116 /*
117  *  INIT_TASK is used to set up the first task table, touch at
118  * your own risk!. Base=0, limit=0x1fffff (=2MB)
119  */
120 #define INIT_TASK(tsk)  \
121 {                                                                       \
122         .state          = 0,                                            \
123         .stack          = &init_thread_info,                            \
124         .usage          = ATOMIC_INIT(2),                               \
125         .flags          = 0,                                            \
126         .lock_depth     = -1,                                           \
127         .prio           = MAX_PRIO-20,                                  \
128         .static_prio    = MAX_PRIO-20,                                  \
129         .normal_prio    = MAX_PRIO-20,                                  \
130         .policy         = SCHED_NORMAL,                                 \
131         .cpus_allowed   = CPU_MASK_ALL,                                 \
132         .mm             = NULL,                                         \
133         .active_mm      = &init_mm,                                     \
134         .run_list       = LIST_HEAD_INIT(tsk.run_list),                 \
135         .ioprio         = 0,                                            \
136         .time_slice     = HZ,                                           \
137         .tasks          = LIST_HEAD_INIT(tsk.tasks),                    \
138         .ptrace_children= LIST_HEAD_INIT(tsk.ptrace_children),          \
139         .ptrace_list    = LIST_HEAD_INIT(tsk.ptrace_list),              \
140         .real_parent    = &tsk,                                         \
141         .parent         = &tsk,                                         \
142         .children       = LIST_HEAD_INIT(tsk.children),                 \
143         .sibling        = LIST_HEAD_INIT(tsk.sibling),                  \
144         .group_leader   = &tsk,                                         \
145         .group_info     = &init_groups,                                 \
146         .cap_effective  = CAP_INIT_EFF_SET,                             \
147         .cap_inheritable = CAP_INIT_INH_SET,                            \
148         .cap_permitted  = CAP_FULL_SET,                                 \
149         .keep_capabilities = 0,                                         \
150         .user           = INIT_USER,                                    \
151         .comm           = "swapper",                                    \
152         .thread         = INIT_THREAD,                                  \
153         .fs             = &init_fs,                                     \
154         .files          = &init_files,                                  \
155         .signal         = &init_signals,                                \
156         .sighand        = &init_sighand,                                \
157         .nsproxy        = &init_nsproxy,                                \
158         .pending        = {                                             \
159                 .list = LIST_HEAD_INIT(tsk.pending.list),               \
160                 .signal = {{0}}},                                       \
161         .blocked        = {{0}},                                        \
162         .alloc_lock     = __SPIN_LOCK_UNLOCKED(tsk.alloc_lock),         \
163         .journal_info   = NULL,                                         \
164         .cpu_timers     = INIT_CPU_TIMERS(tsk.cpu_timers),              \
165         .fs_excl        = ATOMIC_INIT(0),                               \
166         .pi_lock        = __SPIN_LOCK_UNLOCKED(tsk.pi_lock),            \
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         INIT_TRACE_IRQFLAGS                                             \
173         INIT_LOCKDEP                                                    \
174 }
175
176
177 #define INIT_CPU_TIMERS(cpu_timers)                                     \
178 {                                                                       \
179         LIST_HEAD_INIT(cpu_timers[0]),                                  \
180         LIST_HEAD_INIT(cpu_timers[1]),                                  \
181         LIST_HEAD_INIT(cpu_timers[2]),                                  \
182 }
183
184
185 #endif