From 74b24a582e1ff3960f0454f57afc2bcdbc52562e Mon Sep 17 00:00:00 2001
From: Christian Brauner <brauner@kernel.org>
Date: Fri, 12 Sep 2025 13:52:43 +0200
Subject: ipc: support ns lookup

Support the generic ns lookup infrastructure to support file handles for
namespaces.

Signed-off-by: Christian Brauner <brauner@kernel.org>
---
 ipc/msgutil.c | 1 +
 1 file changed, 1 insertion(+)

(limited to 'ipc/msgutil.c')

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"
 
-- 
cgit 


From 024596a4e2802e457a9f92af79f246fa9631f8de Mon Sep 17 00:00:00 2001
From: Christian Brauner <brauner@kernel.org>
Date: Thu, 18 Sep 2025 12:11:59 +0200
Subject: ns: rename to __ns_ref

Make it easier to grep and rename to ns_count.

Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>
---
 ipc/msgutil.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'ipc/msgutil.c')

diff --git a/ipc/msgutil.c b/ipc/msgutil.c
index bbf61275df41..d0f7dcf4c208 100644
--- a/ipc/msgutil.c
+++ b/ipc/msgutil.c
@@ -27,7 +27,7 @@ DEFINE_SPINLOCK(mq_lock);
  * and not CONFIG_IPC_NS.
  */
 struct ipc_namespace init_ipc_ns = {
-	.ns.count = REFCOUNT_INIT(1),
+	.ns.__ns_ref = REFCOUNT_INIT(1),
 	.user_ns = &init_user_ns,
 	.ns.inum = PROC_IPC_INIT_INO,
 #ifdef CONFIG_IPC_NS
-- 
cgit 


From 7cf730321132e726ff949c6f3c0d5c598788f7a2 Mon Sep 17 00:00:00 2001
From: Christian Brauner <brauner@kernel.org>
Date: Fri, 19 Sep 2025 11:29:49 +0200
Subject: ns: use inode initializer for initial namespaces

Just use the common helper we have.

Signed-off-by: Christian Brauner <brauner@kernel.org>
---
 ipc/msgutil.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'ipc/msgutil.c')

diff --git a/ipc/msgutil.c b/ipc/msgutil.c
index d0f7dcf4c208..dca6c8ec8f5f 100644
--- a/ipc/msgutil.c
+++ b/ipc/msgutil.c
@@ -29,7 +29,7 @@ DEFINE_SPINLOCK(mq_lock);
 struct ipc_namespace init_ipc_ns = {
 	.ns.__ns_ref = REFCOUNT_INIT(1),
 	.user_ns = &init_user_ns,
-	.ns.inum = PROC_IPC_INIT_INO,
+	.ns.inum = ns_init_inum(&init_ipc_ns),
 #ifdef CONFIG_IPC_NS
 	.ns.ops = &ipcns_operations,
 #endif
-- 
cgit 


From 4055526d35746ce8b04bfa5e14e14f28bb163186 Mon Sep 17 00:00:00 2001
From: Christian Brauner <brauner@kernel.org>
Date: Wed, 24 Sep 2025 13:33:59 +0200
Subject: ns: move ns type into struct ns_common

It's misplaced in struct proc_ns_operations and ns->ops might be NULL if
the namespace is compiled out but we still want to know the type of the
namespace for the initial namespace struct.

Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>
---
 ipc/msgutil.c | 1 +
 1 file changed, 1 insertion(+)

(limited to 'ipc/msgutil.c')

diff --git a/ipc/msgutil.c b/ipc/msgutil.c
index dca6c8ec8f5f..7a03f6d03de3 100644
--- a/ipc/msgutil.c
+++ b/ipc/msgutil.c
@@ -33,6 +33,7 @@ struct ipc_namespace init_ipc_ns = {
 #ifdef CONFIG_IPC_NS
 	.ns.ops = &ipcns_operations,
 #endif
+	.ns.ns_type = ns_common_type(&init_ipc_ns),
 };
 
 struct msg_msgseg {
-- 
cgit