1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * procfs namespace bits 4 */ 5 #ifndef _LINUX_PROC_NS_H 6 #define _LINUX_PROC_NS_H 7 8 #include <linux/nsfs.h> 9 #include <uapi/linux/nsfs.h> 10 11 struct pid_namespace; 12 struct nsset; 13 struct path; 14 struct task_struct; 15 struct inode; 16 17 struct proc_ns_operations { 18 const char *name; 19 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); 25 } __randomize_layout; 26 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; 37 38 /* 39 * We always define these enumerators 40 */ 41 enum { 42 PROC_IPC_INIT_INO = IPC_NS_INIT_INO, 43 PROC_UTS_INIT_INO = UTS_NS_INIT_INO, 44 PROC_USER_INIT_INO = USER_NS_INIT_INO, 45 PROC_PID_INIT_INO = PID_NS_INIT_INO, 46 PROC_CGROUP_INIT_INO = CGROUP_NS_INIT_INO, 47 PROC_TIME_INIT_INO = TIME_NS_INIT_INO, 48 PROC_NET_INIT_INO = NET_NS_INIT_INO, 49 PROC_MNT_INIT_INO = MNT_NS_INIT_INO, 50 }; 51 52 #ifdef CONFIG_PROC_FS 53 54 extern int proc_alloc_inum(unsigned int *pino); 55 extern void proc_free_inum(unsigned int inum); 56 57 #else /* CONFIG_PROC_FS */ 58 proc_alloc_inum(unsigned int * inum)59static inline int proc_alloc_inum(unsigned int *inum) 60 { 61 *inum = 1; 62 return 0; 63 } proc_free_inum(unsigned int inum)64static inline void proc_free_inum(unsigned int inum) {} 65 66 #endif /* CONFIG_PROC_FS */ 67 68 #define get_proc_ns(inode) ((struct ns_common *)(inode)->i_private) 69 70 #endif /* _LINUX_PROC_NS_H */ 71