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ns: add ns_debug() 

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

Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
Christian Brauner 2025-09-22 14:42:37 +02:00
parent d7610cb745
commit 5890f504ef
1 changed files with 53 additions and 0 deletions
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53
kernel/nscommon.c
View File

@ -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;