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userns: add a user namespace owner of ipc ns

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Changelog:
	Feb 15: Don't set new ipc->user_ns if we didn't create a new
		ipc_ns.
	Feb 23: Move extern declaration to ipc_namespace.h, and group
		fwd declarations at top.

Signed-off-by: Serge E. Hallyn <serge.hallyn@canonical.com>
Acked-by: "Eric W. Biederman" <ebiederm@xmission.com>
Acked-by: Daniel Lezcano <daniel.lezcano@free.fr>
Acked-by: David Howells <dhowells@redhat.com>
Cc: James Morris <jmorris@namei.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Serge E. Hallyn
2011-03-23 16:43:23 -07:00
committed by Linus Torvalds
parent fc832ad364
commit b515498f5b
4 changed files with 16 additions and 2 deletions
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3
include/linux/ipc_namespace.h
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@@ -15,6 +15,7 @@
#define IPCNS_CALLBACK_PRI 0
struct user_namespace;
struct ipc_ids {
int in_use;
@@ -56,6 +57,8 @@ struct ipc_namespace {
unsigned int mq_msg_max; /* initialized to DFLT_MSGMAX */
unsigned int mq_msgsize_max; /* initialized to DFLT_MSGSIZEMAX */
/* user_ns which owns the ipc ns */
struct user_namespace *user_ns;
};
extern struct ipc_namespace init_ipc_ns;