From 071df104f808b8195c40643dcb4d060681742e29 Mon Sep 17 00:00:00 2001 From: "Serge E. Hallyn" Date: Mon, 2 Oct 2006 02:18:17 -0700 Subject: [PATCH] namespaces: utsname: implement CLONE_NEWUTS flag Implement a CLONE_NEWUTS flag, and use it at clone and sys_unshare. [clg@fr.ibm.com: IPC unshare fix] [bunk@stusta.de: cleanup] Signed-off-by: Serge Hallyn Cc: Kirill Korotaev Cc: "Eric W. Biederman" Cc: Herbert Poetzl Cc: Andrey Savochkin Signed-off-by: Adrian Bunk Signed-off-by: Cedric Le Goater Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/utsname.h | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'include/linux/utsname.h') diff --git a/include/linux/utsname.h b/include/linux/utsname.h index 99e522369f4f..02e4b6972064 100644 --- a/include/linux/utsname.h +++ b/include/linux/utsname.h @@ -47,6 +47,8 @@ static inline void get_uts_ns(struct uts_namespace *ns) } #ifdef CONFIG_UTS_NS +extern int unshare_utsname(unsigned long unshare_flags, + struct uts_namespace **new_uts); extern int copy_utsname(int flags, struct task_struct *tsk); extern void free_uts_ns(struct kref *kref); @@ -55,6 +57,15 @@ static inline void put_uts_ns(struct uts_namespace *ns) kref_put(&ns->kref, free_uts_ns); } #else +static inline int unshare_utsname(unsigned long unshare_flags, + struct uts_namespace **new_uts) +{ + if (unshare_flags & CLONE_NEWUTS) + return -EINVAL; + + return 0; +} + static inline int copy_utsname(int flags, struct task_struct *tsk) { return 0; -- cgit v1.2.3-59-g8ed1b