David Howells | 0bb80f2 | 2013-04-12 01:50:06 +0100 | [diff] [blame^] | 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 | |
| 54 | static inline int pid_ns_prepare_proc(struct pid_namespace *ns) { return 0; } |
| 55 | static inline void pid_ns_release_proc(struct pid_namespace *ns) {} |
| 56 | |
| 57 | static inline struct file *proc_ns_fget(int fd) |
| 58 | { |
| 59 | return ERR_PTR(-EINVAL); |
| 60 | } |
| 61 | |
| 62 | static inline struct proc_ns *get_proc_ns(struct inode *inode) { return NULL; } |
| 63 | |
| 64 | static inline int proc_alloc_inum(unsigned int *inum) |
| 65 | { |
| 66 | *inum = 1; |
| 67 | return 0; |
| 68 | } |
| 69 | static inline void proc_free_inum(unsigned int inum) {} |
| 70 | static inline bool proc_ns_inode(struct inode *inode) { return false; } |
| 71 | |
| 72 | #endif /* CONFIG_PROC_FS */ |
| 73 | |
| 74 | #endif /* _LINUX_PROC_NS_H */ |