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pid: support ns lookup

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

Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
Christian Brauner
2025-09-12 13:52:45 +02:00
parent 195f742229
commit 488acdcec8
1 changed files with 4 additions and 0 deletions
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4
kernel/pid_namespace.c
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@@ -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;
}