From e3222c4ecc649c4ae568e61dda9349482401b501 Mon Sep 17 00:00:00 2001 From: Badari Pulavarty Date: Tue, 8 May 2007 00:25:21 -0700 Subject: Merge sys_clone()/sys_unshare() nsproxy and namespace handling sys_clone() and sys_unshare() both makes copies of nsproxy and its associated namespaces. But they have different code paths. This patch merges all the nsproxy and its associated namespace copy/clone handling (as much as possible). Posted on container list earlier for feedback. - Create a new nsproxy and its associated namespaces and pass it back to caller to attach it to right process. - Changed all copy_*_ns() routines to return a new copy of namespace instead of attaching it to task->nsproxy. - Moved the CAP_SYS_ADMIN checks out of copy_*_ns() routines. - Removed unnessary !ns checks from copy_*_ns() and added BUG_ON() just incase. - Get rid of all individual unshare_*_ns() routines and make use of copy_*_ns() instead. [akpm@osdl.org: cleanups, warning fix] [clg@fr.ibm.com: remove dup_namespaces() declaration] [serue@us.ibm.com: fix CONFIG_IPC_NS=n, clone(CLONE_NEWIPC) retval] [akpm@linux-foundation.org: fix build with CONFIG_SYSVIPC=n] Signed-off-by: Badari Pulavarty Signed-off-by: Serge Hallyn Cc: Cedric Le Goater Cc: "Eric W. Biederman" Cc: Signed-off-by: Cedric Le Goater Cc: Oleg Nesterov Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- kernel/pid.c | 11 +++-------- 1 file changed, 3 insertions(+), 8 deletions(-) (limited to 'kernel/pid.c') diff --git a/kernel/pid.c b/kernel/pid.c index 9c80bc23d6b8..d3ad724afa83 100644 --- a/kernel/pid.c +++ b/kernel/pid.c @@ -360,16 +360,11 @@ struct pid *find_ge_pid(int nr) } EXPORT_SYMBOL_GPL(find_get_pid); -int copy_pid_ns(int flags, struct task_struct *tsk) +struct pid_namespace *copy_pid_ns(int flags, struct pid_namespace *old_ns) { - struct pid_namespace *old_ns = tsk->nsproxy->pid_ns; - int err = 0; - - if (!old_ns) - return 0; - + BUG_ON(!old_ns); get_pid_ns(old_ns); - return err; + return old_ns; } void free_pid_ns(struct kref *kref) -- cgit v1.2.3-55-g7522