Commit | Line | Data |
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0bb80f24 DH |
1 | /* |
2 | * procfs namespace bits | |
3 | */ | |
4 | #ifndef _LINUX_PROC_NS_H | |
5 | #define _LINUX_PROC_NS_H | |
6 | ||
e149ed2b AV |
7 | #include <linux/ns_common.h> |
8 | ||
0bb80f24 DH |
9 | struct pid_namespace; |
10 | struct nsproxy; | |
e149ed2b | 11 | struct path; |
a79a908f AK |
12 | struct task_struct; |
13 | struct inode; | |
0bb80f24 DH |
14 | |
15 | struct proc_ns_operations { | |
16 | const char *name; | |
25b14e92 | 17 | const char *real_ns_name; |
0bb80f24 | 18 | int type; |
64964528 AV |
19 | struct ns_common *(*get)(struct task_struct *task); |
20 | void (*put)(struct ns_common *ns); | |
21 | int (*install)(struct nsproxy *nsproxy, struct ns_common *ns); | |
bcac25a5 | 22 | struct user_namespace *(*owner)(struct ns_common *ns); |
a7306ed8 | 23 | struct ns_common *(*get_parent)(struct ns_common *ns); |
0bb80f24 DH |
24 | }; |
25 | ||
0bb80f24 DH |
26 | extern const struct proc_ns_operations netns_operations; |
27 | extern const struct proc_ns_operations utsns_operations; | |
28 | extern const struct proc_ns_operations ipcns_operations; | |
29 | extern const struct proc_ns_operations pidns_operations; | |
eaa0d190 | 30 | extern const struct proc_ns_operations pidns_for_children_operations; |
0bb80f24 DH |
31 | extern const struct proc_ns_operations userns_operations; |
32 | extern const struct proc_ns_operations mntns_operations; | |
a79a908f | 33 | extern const struct proc_ns_operations cgroupns_operations; |
0bb80f24 DH |
34 | |
35 | /* | |
36 | * We always define these enumerators | |
37 | */ | |
38 | enum { | |
39 | PROC_ROOT_INO = 1, | |
40 | PROC_IPC_INIT_INO = 0xEFFFFFFFU, | |
41 | PROC_UTS_INIT_INO = 0xEFFFFFFEU, | |
42 | PROC_USER_INIT_INO = 0xEFFFFFFDU, | |
43 | PROC_PID_INIT_INO = 0xEFFFFFFCU, | |
a79a908f | 44 | PROC_CGROUP_INIT_INO = 0xEFFFFFFBU, |
0bb80f24 DH |
45 | }; |
46 | ||
47 | #ifdef CONFIG_PROC_FS | |
48 | ||
49 | extern int pid_ns_prepare_proc(struct pid_namespace *ns); | |
50 | extern void pid_ns_release_proc(struct pid_namespace *ns); | |
0bb80f24 DH |
51 | extern int proc_alloc_inum(unsigned int *pino); |
52 | extern void proc_free_inum(unsigned int inum); | |
0bb80f24 DH |
53 | |
54 | #else /* CONFIG_PROC_FS */ | |
55 | ||
56 | static inline int pid_ns_prepare_proc(struct pid_namespace *ns) { return 0; } | |
57 | static inline void pid_ns_release_proc(struct pid_namespace *ns) {} | |
58 | ||
0bb80f24 DH |
59 | static inline int proc_alloc_inum(unsigned int *inum) |
60 | { | |
61 | *inum = 1; | |
62 | return 0; | |
63 | } | |
64 | static inline void proc_free_inum(unsigned int inum) {} | |
0bb80f24 DH |
65 | |
66 | #endif /* CONFIG_PROC_FS */ | |
67 | ||
e149ed2b AV |
68 | static inline int ns_alloc_inum(struct ns_common *ns) |
69 | { | |
70 | atomic_long_set(&ns->stashed, 0); | |
71 | return proc_alloc_inum(&ns->inum); | |
72 | } | |
73 | ||
6344c433 AV |
74 | #define ns_free_inum(ns) proc_free_inum((ns)->inum) |
75 | ||
e149ed2b AV |
76 | extern struct file *proc_ns_fget(int fd); |
77 | #define get_proc_ns(inode) ((struct ns_common *)(inode)->i_private) | |
78 | extern void *ns_get_path(struct path *path, struct task_struct *task, | |
79 | const struct proc_ns_operations *ns_ops); | |
80 | ||
81 | extern int ns_get_name(char *buf, size_t size, struct task_struct *task, | |
82 | const struct proc_ns_operations *ns_ops); | |
83 | extern void nsfs_init(void); | |
84 | ||
0bb80f24 | 85 | #endif /* _LINUX_PROC_NS_H */ |