[PATCH 21/32] pid: support iterator
From: Christian Brauner <brauner@kernel.org>
Date: 2025-09-10 14:39:11
Also in:
cgroups, linux-block, linux-fsdevel, linux-kselftest, linux-nfs, lkml
Subsystem:
namespaces:, the rest · Maintainers:
Christian Brauner, Linus Torvalds
Support the generic namespace iterator and lookup infrastructure to support file handles for namespaces. Signed-off-by: Christian Brauner <brauner@kernel.org> --- kernel/pid_namespace.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/kernel/pid_namespace.c b/kernel/pid_namespace.c
index 20ce4052d1c5..228ae20299f9 100644
--- a/kernel/pid_namespace.c
+++ b/kernel/pid_namespace.c@@ -23,6 +23,7 @@ #include <linux/sched/task.h> #include <linux/sched/signal.h> #include <linux/idr.h> +#include <linux/nstree.h> #include <uapi/linux/wait.h> #include "pid_sysctl.h"
@@ -122,6 +123,7 @@ static struct pid_namespace *create_pid_namespace(struct user_namespace *user_ns ns->memfd_noexec_scope = pidns_memfd_noexec_scope(parent_pid_ns); #endif + ns_tree_add(ns); return ns; out_free_inum:
@@ -147,6 +149,7 @@ static void delayed_free_pidns(struct rcu_head *p) static void destroy_pid_namespace(struct pid_namespace *ns) { + ns_tree_remove(ns); unregister_pidns_sysctls(ns); ns_free_inum(&ns->ns);
@@ -473,6 +476,7 @@ static __init int pid_namespaces_init(void) #endif register_pid_ns_sysctl_table_vm(); + ns_tree_add(&init_pid_ns); return 0; }
--
2.47.3