From 9a28ac1762a7a3a6ab4f82ff655843d6ab3ca62c Mon Sep 17 00:00:00 2001 From: Jeff Layton Date: Wed, 8 Jan 2025 16:00:15 -0500 Subject: lockd: add netlink control interface The legacy rpc.nfsd tool will set the nlm_grace_period if the NFSv4 grace period is set. nfsdctl is missing this functionality, so add a new netlink control interface for lockd that it can use. For now, it only allows setting the grace period, and the tcp and udp listener ports. lockd currently uses module parameters and sysctls for configuration, so all of its settings are global. With this change, lockd now tracks these values on a per-net-ns basis. It will only fall back to using the global values if any of them are 0. Finally, as a backward compatibility measure, if updating the nlm settings in the init_net namespace, also update the legacy global values to match. Link: https://issues.redhat.com/browse/RHEL-71698 Signed-off-by: Jeff Layton Signed-off-by: Chuck Lever --- include/uapi/linux/lockd_netlink.h | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) create mode 100644 include/uapi/linux/lockd_netlink.h (limited to 'include/uapi/linux') diff --git a/include/uapi/linux/lockd_netlink.h b/include/uapi/linux/lockd_netlink.h new file mode 100644 index 000000000000..21c65aec3bc6 --- /dev/null +++ b/include/uapi/linux/lockd_netlink.h @@ -0,0 +1,29 @@ +/* SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) */ +/* Do not edit directly, auto-generated from: */ +/* Documentation/netlink/specs/lockd.yaml */ +/* YNL-GEN uapi header */ + +#ifndef _UAPI_LINUX_LOCKD_NETLINK_H +#define _UAPI_LINUX_LOCKD_NETLINK_H + +#define LOCKD_FAMILY_NAME "lockd" +#define LOCKD_FAMILY_VERSION 1 + +enum { + LOCKD_A_SERVER_GRACETIME = 1, + LOCKD_A_SERVER_TCP_PORT, + LOCKD_A_SERVER_UDP_PORT, + + __LOCKD_A_SERVER_MAX, + LOCKD_A_SERVER_MAX = (__LOCKD_A_SERVER_MAX - 1) +}; + +enum { + LOCKD_CMD_SERVER_SET = 1, + LOCKD_CMD_SERVER_GET, + + __LOCKD_CMD_MAX, + LOCKD_CMD_MAX = (__LOCKD_CMD_MAX - 1) +}; + +#endif /* _UAPI_LINUX_LOCKD_NETLINK_H */ -- cgit v1.2.3