/* SPDX-License-Identifier: GPL-2.0 */#ifndef LINUX_PID_SYSCTL_H#define LINUX_PID_SYSCTL_H #include <linux/pid_namespace.h> #if defined(CONFIG_SYSCTL) && defined(CONFIG_MEMFD_CREATE)static inline void initialize_memfd_noexec_scope(struct pid_namespace *ns){	ns->memfd_noexec_scope =		task_active_pid_ns(current)->memfd_noexec_scope;} static int pid_mfd_noexec_dointvec_minmax(struct ctl_table *table,	int write, void *buf, size_t *lenp, loff_t *ppos){	struct pid_namespace *ns = task_active_pid_ns(current);	struct ctl_table table_copy; 	if (write && !ns_capable(ns->user_ns, CAP_SYS_ADMIN))		return -EPERM; 	table_copy = *table;	if (ns != &init_pid_ns)		table_copy.data = &ns->memfd_noexec_scope; 	/*	 * set minimum to current value, the effect is only bigger	 * value is accepted.	 */	if (*(int *)table_copy.data > *(int *)table_copy.extra1)		table_copy.extra1 = table_copy.data; 	return proc_dointvec_minmax(&table_copy, write, buf, lenp, ppos);} static struct ctl_table pid_ns_ctl_table_vm[] = {	{		.procname	= "memfd_noexec",		.data		= &init_pid_ns.memfd_noexec_scope,		.maxlen		= sizeof(init_pid_ns.memfd_noexec_scope),		.mode		= 0644,		.proc_handler	= pid_mfd_noexec_dointvec_minmax,		.extra1		= SYSCTL_ZERO,		.extra2		= SYSCTL_TWO,	},	{ }};static inline void register_pid_ns_sysctl_table_vm(void){	register_sysctl("vm", pid_ns_ctl_table_vm);}#elsestatic inline void initialize_memfd_noexec_scope(struct pid_namespace *ns) {}static inline void register_pid_ns_sysctl_table_vm(void) {}#endif #endif /* LINUX_PID_SYSCTL_H */