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authorKirill Korotaev <dev@openvz.org>2006-10-02 02:18:20 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-10-02 07:57:22 -0700
commit73ea41302bab5e02c9e86ab15c509494a550f1db (patch)
tree10971a839dd53a9e18d6c866c9be93517fe8de25 /include/linux/ipc.h
parent25b21cb2f6d69b0475b134e0a3e8e269137270fa (diff)
download96b-common-73ea41302bab5e02c9e86ab15c509494a550f1db.tar.gz
[PATCH] IPC namespace - utils
This patch adds basic IPC namespace functionality to IPC utils: - init_ipc_ns - copy/clone/unshare/free IPC ns - /proc preparations Signed-off-by: Pavel Emelianov <xemul@openvz.org> Signed-off-by: Kirill Korotaev <dev@openvz.org> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Cedric Le Goater <clg@fr.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/linux/ipc.h')
-rw-r--r--include/linux/ipc.h18
1 files changed, 18 insertions, 0 deletions
diff --git a/include/linux/ipc.h b/include/linux/ipc.h
index 36027b10f283..d9e2b3f36c35 100644
--- a/include/linux/ipc.h
+++ b/include/linux/ipc.h
@@ -88,20 +88,38 @@ struct ipc_namespace {
};
extern struct ipc_namespace init_ipc_ns;
+
+#ifdef CONFIG_SYSVIPC
+#define INIT_IPC_NS(ns) .ns = &init_ipc_ns,
+#else
+#define INIT_IPC_NS(ns)
+#endif
+
+#ifdef CONFIG_IPC_NS
extern void free_ipc_ns(struct kref *kref);
extern int copy_ipcs(unsigned long flags, struct task_struct *tsk);
extern int unshare_ipcs(unsigned long flags, struct ipc_namespace **ns);
+#else
+static inline int copy_ipcs(unsigned long flags, struct task_struct *tsk)
+{
+ return 0;
+}
+#endif
static inline struct ipc_namespace *get_ipc_ns(struct ipc_namespace *ns)
{
+#ifdef CONFIG_IPC_NS
if (ns)
kref_get(&ns->kref);
+#endif
return ns;
}
static inline void put_ipc_ns(struct ipc_namespace *ns)
{
+#ifdef CONFIG_IPC_NS
kref_put(&ns->kref, free_ipc_ns);
+#endif
}
#endif /* __KERNEL__ */