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[PATCH] namespaces: utsname: implement CLONE_NEWUTS flag

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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 <serue@us.ibm.com>
Cc: Kirill Korotaev <dev@openvz.org>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Herbert Poetzl <herbert@13thfloor.at>
Cc: Andrey Savochkin <saw@sw.ru>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Cedric Le Goater <clg@fr.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Serge E. Hallyn 2006-10-02 02:18:17 -07:00 • committed by Linus Torvalds
parent bf47fdcda6
commit 071df104f8
5 changed files with 83 additions and 4 deletions
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11
include/linux/utsname.h
View file

@ -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;