1 /* SPDX-License-Identifier: GPL-2.0 */
3 * procfs namespace bits
5 #ifndef _LINUX_PROC_NS_H
6 #define _LINUX_PROC_NS_H
8 #include <linux/ns_common.h>
16 struct proc_ns_operations {
18 const char *real_ns_name;
20 struct ns_common *(*get)(struct task_struct *task);
21 void (*put)(struct ns_common *ns);
22 int (*install)(struct nsset *nsset, struct ns_common *ns);
23 struct user_namespace *(*owner)(struct ns_common *ns);
24 struct ns_common *(*get_parent)(struct ns_common *ns);
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;
31 extern const struct proc_ns_operations pidns_for_children_operations;
32 extern const struct proc_ns_operations userns_operations;
33 extern const struct proc_ns_operations mntns_operations;
34 extern const struct proc_ns_operations cgroupns_operations;
35 extern const struct proc_ns_operations timens_operations;
36 extern const struct proc_ns_operations timens_for_children_operations;
39 * We always define these enumerators
43 PROC_IPC_INIT_INO = 0xEFFFFFFFU,
44 PROC_UTS_INIT_INO = 0xEFFFFFFEU,
45 PROC_USER_INIT_INO = 0xEFFFFFFDU,
46 PROC_PID_INIT_INO = 0xEFFFFFFCU,
47 PROC_CGROUP_INIT_INO = 0xEFFFFFFBU,
48 PROC_TIME_INIT_INO = 0xEFFFFFFAU,
53 extern int proc_alloc_inum(unsigned int *pino);
54 extern void proc_free_inum(unsigned int inum);
56 #else /* CONFIG_PROC_FS */
58 static inline int proc_alloc_inum(unsigned int *inum)
63 static inline void proc_free_inum(unsigned int inum) {}
65 #endif /* CONFIG_PROC_FS */
67 static inline int ns_alloc_inum(struct ns_common *ns)
69 atomic_long_set(&ns->stashed, 0);
70 return proc_alloc_inum(&ns->inum);
73 #define ns_free_inum(ns) proc_free_inum((ns)->inum)
75 #define get_proc_ns(inode) ((struct ns_common *)(inode)->i_private)
76 extern int ns_get_path(struct path *path, struct task_struct *task,
77 const struct proc_ns_operations *ns_ops);
78 typedef struct ns_common *ns_get_path_helper_t(void *);
79 extern int ns_get_path_cb(struct path *path, ns_get_path_helper_t ns_get_cb,
82 extern bool ns_match(const struct ns_common *ns, dev_t dev, ino_t ino);
84 extern int ns_get_name(char *buf, size_t size, struct task_struct *task,
85 const struct proc_ns_operations *ns_ops);
86 extern void nsfs_init(void);
88 #endif /* _LINUX_PROC_NS_H */