[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <159611045173.535980.13125182914304511849.stgit@localhost.localdomain>
Date: Thu, 30 Jul 2020 15:00:51 +0300
From: Kirill Tkhai <ktkhai@...tuozzo.com>
To: viro@...iv.linux.org.uk, adobriyan@...il.com, davem@...emloft.net,
ebiederm@...ssion.com, akpm@...ux-foundation.org,
christian.brauner@...ntu.com, areber@...hat.com, serge@...lyn.com,
linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
ktkhai@...tuozzo.com
Subject: [PATCH 17/23] pid: Add pid namespaces into ns_idr
Now they are exposed in /proc/namespace/ directory.
Note, that we already wait RCU grace period before
pid namespace's memory is freed.
Signed-off-by: Kirill Tkhai <ktkhai@...tuozzo.com>
---
kernel/pid_namespace.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/kernel/pid_namespace.c b/kernel/pid_namespace.c
index da8490390f51..06398a7c4c59 100644
--- a/kernel/pid_namespace.c
+++ b/kernel/pid_namespace.c
@@ -109,8 +109,13 @@ static struct pid_namespace *create_pid_namespace(struct user_namespace *user_ns
ns->ucounts = ucounts;
ns->pid_allocated = PIDNS_ADDING;
+ if (ns_idr_register(&ns->ns) < 0)
+ goto out_free_inum;
+
return ns;
+out_free_inum:
+ ns_free_inum(&ns->ns);
out_free_idr:
idr_destroy(&ns->idr);
kmem_cache_free(pid_ns_cachep, ns);
@@ -132,6 +137,7 @@ static void delayed_free_pidns(struct rcu_head *p)
static void destroy_pid_namespace(struct pid_namespace *ns)
{
+ ns_idr_unregister(&ns->ns);
ns_free_inum(&ns->ns);
idr_destroy(&ns->idr);
@@ -466,6 +472,7 @@ static __init int pid_namespaces_init(void)
#ifdef CONFIG_CHECKPOINT_RESTORE
register_sysctl_paths(kern_path, pid_ns_ctl_table);
#endif
+ WARN_ON(ns_idr_register(&init_pid_ns.ns) < 0);
return 0;
}
Powered by blists - more mailing lists