[PATCH 19/32] ipc: support iterator
From: Christian Brauner <brauner@kernel.org>
Date: 2025-09-10 14:38:59
Also in:
cgroups, linux-block, linux-fsdevel, linux-kselftest, linux-nfs, lkml
Subsystem:
the rest · Maintainer:
Linus Torvalds
Support the generic namespace iterator and lookup infrastructure to support file handles for namespaces. Signed-off-by: Christian Brauner <brauner@kernel.org> --- ipc/msgutil.c | 1 + ipc/namespace.c | 3 +++ ipc/shm.c | 2 ++ 3 files changed, 6 insertions(+)
diff --git a/ipc/msgutil.c b/ipc/msgutil.c
index c7be0c792647..bbf61275df41 100644
--- a/ipc/msgutil.c
+++ b/ipc/msgutil.c@@ -15,6 +15,7 @@ #include <linux/proc_ns.h> #include <linux/uaccess.h> #include <linux/sched.h> +#include <linux/nstree.h> #include "util.h"
diff --git a/ipc/namespace.c b/ipc/namespace.c
index d4188a88ee57..9f923c1a1eb3 100644
--- a/ipc/namespace.c
+++ b/ipc/namespace.c@@ -15,6 +15,7 @@ #include <linux/mount.h> #include <linux/user_namespace.h> #include <linux/proc_ns.h> +#include <linux/nstree.h> #include <linux/sched/task.h> #include "util.h"
@@ -85,6 +86,7 @@ static struct ipc_namespace *create_ipc_ns(struct user_namespace *user_ns, sem_init_ns(ns); shm_init_ns(ns); + ns_tree_add(ns); return ns;
@@ -201,6 +203,7 @@ void put_ipc_ns(struct ipc_namespace *ns) mq_clear_sbinfo(ns); spin_unlock(&mq_lock); + ns_tree_remove(ns); if (llist_add(&ns->mnt_llist, &free_ipc_list)) schedule_work(&free_ipc_work); }
diff --git a/ipc/shm.c b/ipc/shm.c
index a9310b6dbbc3..3db36773dd10 100644
--- a/ipc/shm.c
+++ b/ipc/shm.c@@ -45,6 +45,7 @@ #include <linux/mount.h> #include <linux/ipc_namespace.h> #include <linux/rhashtable.h> +#include <linux/nstree.h> #include <linux/uaccess.h>
@@ -148,6 +149,7 @@ void shm_exit_ns(struct ipc_namespace *ns) static int __init ipc_ns_init(void) { shm_init_ns(&init_ipc_ns); + ns_tree_add(&init_ipc_ns); return 0; }
--
2.47.3