1 /* 2 * procfs namespace bits 3 */ 4 #ifndef _LINUX_PROC_NS_H 5 #define _LINUX_PROC_NS_H 6 7 struct pid_namespace; 8 struct nsproxy; 9 10 struct proc_ns_operations { 11 const char *name; 12 int type; 13 void *(*get)(struct task_struct *task); 14 void (*put)(void *ns); 15 int (*install)(struct nsproxy *nsproxy, void *ns); 16 unsigned int (*inum)(void *ns); 17 }; 18 19 struct proc_ns { 20 void *ns; 21 const struct proc_ns_operations *ns_ops; 22 }; 23 24 extern const struct proc_ns_operations netns_operations; 25 extern const struct proc_ns_operations utsns_operations; 26 extern const struct proc_ns_operations ipcns_operations; 27 extern const struct proc_ns_operations pidns_operations; 28 extern const struct proc_ns_operations userns_operations; 29 extern const struct proc_ns_operations mntns_operations; 30 31 /* 32 * We always define these enumerators 33 */ 34 enum { 35 PROC_ROOT_INO = 1, 36 PROC_IPC_INIT_INO = 0xEFFFFFFFU, 37 PROC_UTS_INIT_INO = 0xEFFFFFFEU, 38 PROC_USER_INIT_INO = 0xEFFFFFFDU, 39 PROC_PID_INIT_INO = 0xEFFFFFFCU, 40 }; 41 42 #ifdef CONFIG_PROC_FS 43 44 extern int pid_ns_prepare_proc(struct pid_namespace *ns); 45 extern void pid_ns_release_proc(struct pid_namespace *ns); 46 extern struct file *proc_ns_fget(int fd); 47 extern struct proc_ns *get_proc_ns(struct inode *); 48 extern int proc_alloc_inum(unsigned int *pino); 49 extern void proc_free_inum(unsigned int inum); 50 extern bool proc_ns_inode(struct inode *inode); 51 52 #else /* CONFIG_PROC_FS */ 53 pid_ns_prepare_proc(struct pid_namespace * ns)54static inline int pid_ns_prepare_proc(struct pid_namespace *ns) { return 0; } pid_ns_release_proc(struct pid_namespace * ns)55static inline void pid_ns_release_proc(struct pid_namespace *ns) {} 56 proc_ns_fget(int fd)57static inline struct file *proc_ns_fget(int fd) 58 { 59 return ERR_PTR(-EINVAL); 60 } 61 get_proc_ns(struct inode * inode)62static inline struct proc_ns *get_proc_ns(struct inode *inode) { return NULL; } 63 proc_alloc_inum(unsigned int * inum)64static inline int proc_alloc_inum(unsigned int *inum) 65 { 66 *inum = 1; 67 return 0; 68 } proc_free_inum(unsigned int inum)69static inline void proc_free_inum(unsigned int inum) {} proc_ns_inode(struct inode * inode)70static inline bool proc_ns_inode(struct inode *inode) { return false; } 71 72 #endif /* CONFIG_PROC_FS */ 73 74 #endif /* _LINUX_PROC_NS_H */ 75