Unverified Commit 86cdbae5 authored Sep 17, 2025 by Christian Brauner

mnt: simplify ns_common_init() handling



Assign the reserved MNT_NS_ANON_INO sentinel to anonymous mount
namespaces and cleanup the initial mount ns allocation. This is just a
preparatory patch and the ns->inum check in ns_common_init() will be
dropped in the next patch.

Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>

parent cc47f434

fs/namespace.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -4103,6 +4103,8 @@ static struct mnt_namespace alloc_mnt_ns(struct user_namespace user_ns, bool a
		return ERR_PTR(-ENOMEM);
		}

		if (anon)
		new_ns->ns.inum = MNT_NS_ANON_INO;
		ret = ns_common_init(&new_ns->ns, &mntns_operations, !anon);
		if (ret) {
		kfree(new_ns);

kernel/nscommon.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -5,7 +5,7 @@
		int ns_common_init(struct ns_common ns, const struct proc_ns_operations ops,
		bool alloc_inum)
		{
		if (alloc_inum) {
		if (alloc_inum && !ns->inum) {
		int ret;
		ret = proc_alloc_inum(&ns->inum);
		if (ret)