Commit 5890f504 authored by Christian Brauner's avatar Christian Brauner
Browse files

ns: add ns_debug() 



Add ns_debug() that asserts that the correct operations are used for the
namespace type.

Reviewed-by: default avatarJan Kara <jack@suse.cz>
Signed-off-by: default avatarChristian Brauner <brauner@kernel.org>
parent d7610cb7

kernel/nscommon.c

+53 −0
Original line number Diff line number Diff line
@@ -2,6 +2,55 @@ 


#include <linux/ns_common.h>

#include <linux/proc_ns.h>

#include <linux/vfsdebug.h>



#ifdef CONFIG_DEBUG_VFS

static void ns_debug(struct ns_common *ns, const struct proc_ns_operations *ops)

{

	switch (ns->ops->type) {

#ifdef CONFIG_CGROUPS

	case CLONE_NEWCGROUP:

		VFS_WARN_ON_ONCE(ops != &cgroupns_operations);

		break;

#endif

#ifdef CONFIG_IPC_NS

	case CLONE_NEWIPC:

		VFS_WARN_ON_ONCE(ops != &ipcns_operations);

		break;

#endif

	case CLONE_NEWNS:

		VFS_WARN_ON_ONCE(ops != &mntns_operations);

		break;

#ifdef CONFIG_NET_NS

	case CLONE_NEWNET:

		VFS_WARN_ON_ONCE(ops != &netns_operations);

		break;

#endif

#ifdef CONFIG_PID_NS

	case CLONE_NEWPID:

		VFS_WARN_ON_ONCE(ops != &pidns_operations);

		break;

#endif

#ifdef CONFIG_TIME_NS

	case CLONE_NEWTIME:

		VFS_WARN_ON_ONCE(ops != &timens_operations);

		break;

#endif

#ifdef CONFIG_USER_NS

	case CLONE_NEWUSER:

		VFS_WARN_ON_ONCE(ops != &userns_operations);

		break;

#endif

#ifdef CONFIG_UTS_NS

	case CLONE_NEWUTS:

		VFS_WARN_ON_ONCE(ops != &utsns_operations);

		break;

#endif

	default:

		VFS_WARN_ON_ONCE(true);

	}

}

#endif



int __ns_common_init(struct ns_common *ns, const struct proc_ns_operations *ops, int inum)

{
@@ -12,6 +61,10 @@ int __ns_common_init(struct ns_common *ns, const struct proc_ns_operations *ops, 
	RB_CLEAR_NODE(&ns->ns_tree_node);

	INIT_LIST_HEAD(&ns->ns_list_node);



#ifdef CONFIG_DEBUG_VFS

	ns_debug(ns, ops);

#endif



	if (inum) {

		ns->inum = inum;

		return 0;