From 0bb80f240520c4148b623161e7856858c021696d Mon Sep 17 00:00:00 2001 From: David Howells Date: Fri, 12 Apr 2013 01:50:06 +0100 Subject: proc: Split the namespace stuff out into linux/proc_ns.h Split the proc namespace stuff out into linux/proc_ns.h. Signed-off-by: David Howells cc: netdev@vger.kernel.org cc: Serge E. Hallyn cc: Eric W. Biederman Signed-off-by: Al Viro --- include/linux/proc_ns.h | 74 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 74 insertions(+) create mode 100644 include/linux/proc_ns.h (limited to 'include/linux/proc_ns.h') diff --git a/include/linux/proc_ns.h b/include/linux/proc_ns.h new file mode 100644 index 0000000..34a1e10 --- /dev/null +++ b/include/linux/proc_ns.h @@ -0,0 +1,74 @@ +/* + * procfs namespace bits + */ +#ifndef _LINUX_PROC_NS_H +#define _LINUX_PROC_NS_H + +struct pid_namespace; +struct nsproxy; + +struct proc_ns_operations { + const char *name; + int type; + void *(*get)(struct task_struct *task); + void (*put)(void *ns); + int (*install)(struct nsproxy *nsproxy, void *ns); + unsigned int (*inum)(void *ns); +}; + +struct proc_ns { + void *ns; + const struct proc_ns_operations *ns_ops; +}; + +extern const struct proc_ns_operations netns_operations; +extern const struct proc_ns_operations utsns_operations; +extern const struct proc_ns_operations ipcns_operations; +extern const struct proc_ns_operations pidns_operations; +extern const struct proc_ns_operations userns_operations; +extern const struct proc_ns_operations mntns_operations; + +/* + * We always define these enumerators + */ +enum { + PROC_ROOT_INO = 1, + PROC_IPC_INIT_INO = 0xEFFFFFFFU, + PROC_UTS_INIT_INO = 0xEFFFFFFEU, + PROC_USER_INIT_INO = 0xEFFFFFFDU, + PROC_PID_INIT_INO = 0xEFFFFFFCU, +}; + +#ifdef CONFIG_PROC_FS + +extern int pid_ns_prepare_proc(struct pid_namespace *ns); +extern void pid_ns_release_proc(struct pid_namespace *ns); +extern struct file *proc_ns_fget(int fd); +extern struct proc_ns *get_proc_ns(struct inode *); +extern int proc_alloc_inum(unsigned int *pino); +extern void proc_free_inum(unsigned int inum); +extern bool proc_ns_inode(struct inode *inode); + +#else /* CONFIG_PROC_FS */ + +static inline int pid_ns_prepare_proc(struct pid_namespace *ns) { return 0; } +static inline void pid_ns_release_proc(struct pid_namespace *ns) {} + +static inline struct file *proc_ns_fget(int fd) +{ + return ERR_PTR(-EINVAL); +} + +static inline struct proc_ns *get_proc_ns(struct inode *inode) { return NULL; } + +static inline int proc_alloc_inum(unsigned int *inum) +{ + *inum = 1; + return 0; +} +static inline void proc_free_inum(unsigned int inum) {} +static inline bool proc_ns_inode(struct inode *inode) { return false; } + +#endif /* CONFIG_PROC_FS */ + +#endif /* _LINUX_PROC_NS_H */ -- cgit v1.1