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author | David Howells <dhowells@redhat.com> | 2013-04-12 01:50:06 +0100 |
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committer | Al Viro <viro@zeniv.linux.org.uk> | 2013-05-01 17:29:39 -0400 |
commit | 0bb80f240520c4148b623161e7856858c021696d (patch) | |
tree | eeb27af589bc12d5864bd2594e5eea59aabe37db /include/linux/proc_ns.h | |
parent | c3bef7bcaaa7d9f6704fcd81a171c9f0c91a2259 (diff) | |
download | linux-stable-0bb80f240520c4148b623161e7856858c021696d.tar.gz linux-stable-0bb80f240520c4148b623161e7856858c021696d.tar.bz2 linux-stable-0bb80f240520c4148b623161e7856858c021696d.zip |
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 <dhowells@redhat.com>
cc: netdev@vger.kernel.org
cc: Serge E. Hallyn <serge.hallyn@ubuntu.com>
cc: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'include/linux/proc_ns.h')
-rw-r--r-- | include/linux/proc_ns.h | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/include/linux/proc_ns.h b/include/linux/proc_ns.h new file mode 100644 index 000000000000..34a1e105bef4 --- /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 */ |