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| author | Andrey Vagin <avagin@openvz.org> | 2016-09-06 00:47:15 -0700 |
|---|---|---|
| committer | Eric W. Biederman <ebiederm@xmission.com> | 2016-09-22 19:59:41 -0500 |
| commit | a7306ed8d94af729ecef8b6e37506a1c6fc14788 (patch) | |
| tree | 0d45320911d2a339bc0abd6bacd5703c7308c08c /include | |
| parent | 6786741dbf99e44fb0c0ed85a37582b8a26f1c3b (diff) | |
| download | linux-a7306ed8d94af729ecef8b6e37506a1c6fc14788.tar.gz linux-a7306ed8d94af729ecef8b6e37506a1c6fc14788.tar.bz2 linux-a7306ed8d94af729ecef8b6e37506a1c6fc14788.zip | |
nsfs: add ioctl to get a parent namespace
Pid and user namepaces are hierarchical. There is no way to discover
parent-child relationships.
In a future we will use this interface to dump and restore nested
namespaces.
Acked-by: Serge Hallyn <serge@hallyn.com>
Signed-off-by: Andrei Vagin <avagin@openvz.org>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/proc_ns.h | 1 | ||||
| -rw-r--r-- | include/uapi/linux/nsfs.h | 2 |
2 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/proc_ns.h b/include/linux/proc_ns.h index ca85a4348ffc..12cb8bd81d2d 100644 --- a/include/linux/proc_ns.h +++ b/include/linux/proc_ns.h @@ -19,6 +19,7 @@ struct proc_ns_operations { void (*put)(struct ns_common *ns); int (*install)(struct nsproxy *nsproxy, struct ns_common *ns); struct user_namespace *(*owner)(struct ns_common *ns); + struct ns_common *(*get_parent)(struct ns_common *ns); }; extern const struct proc_ns_operations netns_operations; diff --git a/include/uapi/linux/nsfs.h b/include/uapi/linux/nsfs.h index 5cacd5c1b5d7..3af617230d1b 100644 --- a/include/uapi/linux/nsfs.h +++ b/include/uapi/linux/nsfs.h @@ -7,5 +7,7 @@ /* Returns a file descriptor that refers to an owning user namespace */ #define NS_GET_USERNS _IO(NSIO, 0x1) +/* Returns a file descriptor that refers to a parent namespace */ +#define NS_GET_PARENT _IO(NSIO, 0x2) #endif /* __LINUX_NSFS_H */ |