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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
0bb80f24 DH |
2 | /* |
3 | * procfs namespace bits | |
4 | */ | |
5 | #ifndef _LINUX_PROC_NS_H | |
6 | #define _LINUX_PROC_NS_H | |
7 | ||
e149ed2b AV |
8 | #include <linux/ns_common.h> |
9 | ||
0bb80f24 DH |
10 | struct pid_namespace; |
11 | struct nsproxy; | |
e149ed2b | 12 | struct path; |
a79a908f AK |
13 | struct task_struct; |
14 | struct inode; | |
0bb80f24 DH |
15 | |
16 | struct proc_ns_operations { | |
17 | const char *name; | |
25b14e92 | 18 | const char *real_ns_name; |
0bb80f24 | 19 | int type; |
64964528 AV |
20 | struct ns_common *(*get)(struct task_struct *task); |
21 | void (*put)(struct ns_common *ns); | |
22 | int (*install)(struct nsproxy *nsproxy, struct ns_common *ns); | |
bcac25a5 | 23 | struct user_namespace *(*owner)(struct ns_common *ns); |
a7306ed8 | 24 | struct ns_common *(*get_parent)(struct ns_common *ns); |
3859a271 | 25 | } __randomize_layout; |
0bb80f24 | 26 | |
0bb80f24 DH |
27 | extern const struct proc_ns_operations netns_operations; |
28 | extern const struct proc_ns_operations utsns_operations; | |
29 | extern const struct proc_ns_operations ipcns_operations; | |
30 | extern const struct proc_ns_operations pidns_operations; | |
eaa0d190 | 31 | extern const struct proc_ns_operations pidns_for_children_operations; |
0bb80f24 DH |
32 | extern const struct proc_ns_operations userns_operations; |
33 | extern const struct proc_ns_operations mntns_operations; | |
a79a908f | 34 | extern const struct proc_ns_operations cgroupns_operations; |
0bb80f24 DH |
35 | |
36 | /* | |
37 | * We always define these enumerators | |
38 | */ | |
39 | enum { | |
40 | PROC_ROOT_INO = 1, | |
41 | PROC_IPC_INIT_INO = 0xEFFFFFFFU, | |
42 | PROC_UTS_INIT_INO = 0xEFFFFFFEU, | |
43 | PROC_USER_INIT_INO = 0xEFFFFFFDU, | |
44 | PROC_PID_INIT_INO = 0xEFFFFFFCU, | |
a79a908f | 45 | PROC_CGROUP_INIT_INO = 0xEFFFFFFBU, |
0bb80f24 DH |
46 | }; |
47 | ||
48 | #ifdef CONFIG_PROC_FS | |
49 | ||
50 | extern int pid_ns_prepare_proc(struct pid_namespace *ns); | |
51 | extern void pid_ns_release_proc(struct pid_namespace *ns); | |
0bb80f24 DH |
52 | extern int proc_alloc_inum(unsigned int *pino); |
53 | extern void proc_free_inum(unsigned int inum); | |
0bb80f24 DH |
54 | |
55 | #else /* CONFIG_PROC_FS */ | |
56 | ||
57 | static inline int pid_ns_prepare_proc(struct pid_namespace *ns) { return 0; } | |
58 | static inline void pid_ns_release_proc(struct pid_namespace *ns) {} | |
59 | ||
0bb80f24 DH |
60 | static inline int proc_alloc_inum(unsigned int *inum) |
61 | { | |
62 | *inum = 1; | |
63 | return 0; | |
64 | } | |
65 | static inline void proc_free_inum(unsigned int inum) {} | |
0bb80f24 DH |
66 | |
67 | #endif /* CONFIG_PROC_FS */ | |
68 | ||
e149ed2b AV |
69 | static inline int ns_alloc_inum(struct ns_common *ns) |
70 | { | |
71 | atomic_long_set(&ns->stashed, 0); | |
72 | return proc_alloc_inum(&ns->inum); | |
73 | } | |
74 | ||
6344c433 AV |
75 | #define ns_free_inum(ns) proc_free_inum((ns)->inum) |
76 | ||
e149ed2b AV |
77 | extern struct file *proc_ns_fget(int fd); |
78 | #define get_proc_ns(inode) ((struct ns_common *)(inode)->i_private) | |
79 | extern void *ns_get_path(struct path *path, struct task_struct *task, | |
80 | const struct proc_ns_operations *ns_ops); | |
cdab6ba8 JK |
81 | typedef struct ns_common *ns_get_path_helper_t(void *); |
82 | extern void *ns_get_path_cb(struct path *path, ns_get_path_helper_t ns_get_cb, | |
83 | void *private_data); | |
e149ed2b AV |
84 | |
85 | extern int ns_get_name(char *buf, size_t size, struct task_struct *task, | |
86 | const struct proc_ns_operations *ns_ops); | |
87 | extern void nsfs_init(void); | |
88 | ||
0bb80f24 | 89 | #endif /* _LINUX_PROC_NS_H */ |