--- /dev/null
+// 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 kernel source */
+
+#include <net/netlink.h>
+#include <net/genetlink.h>
+
+#include "netlink.h"
+
+#include <uapi/linux/lockd_netlink.h>
+
+/* LOCKD_CMD_SERVER_SET - do */
+static const struct nla_policy lockd_server_set_nl_policy[LOCKD_A_SERVER_UDP_PORT + 1] = {
+ [LOCKD_A_SERVER_GRACETIME] = { .type = NLA_U32, },
+ [LOCKD_A_SERVER_TCP_PORT] = { .type = NLA_U16, },
+ [LOCKD_A_SERVER_UDP_PORT] = { .type = NLA_U16, },
+};
+
+/* Ops table for lockd */
+static const struct genl_split_ops lockd_nl_ops[] = {
+ {
+ .cmd = LOCKD_CMD_SERVER_SET,
+ .doit = lockd_nl_server_set_doit,
+ .policy = lockd_server_set_nl_policy,
+ .maxattr = LOCKD_A_SERVER_UDP_PORT,
+ .flags = GENL_ADMIN_PERM | GENL_CMD_CAP_DO,
+ },
+ {
+ .cmd = LOCKD_CMD_SERVER_GET,
+ .doit = lockd_nl_server_get_doit,
+ .flags = GENL_CMD_CAP_DO,
+ },
+};
+
+struct genl_family lockd_nl_family __ro_after_init = {
+ .name = LOCKD_FAMILY_NAME,
+ .version = LOCKD_FAMILY_VERSION,
+ .netnsok = true,
+ .parallel_ops = true,
+ .module = THIS_MODULE,
+ .split_ops = lockd_nl_ops,
+ .n_split_ops = ARRAY_SIZE(lockd_nl_ops),
+};
#include "netns.h"
#include "procfs.h"
+#include "netlink.h"
#define NLMDBG_FACILITY NLMDBG_SVC
#define LOCKD_BUFSIZE (1024 + NLMSVC_XDRSIZE)
static struct ctl_table_header * nlm_sysctl_table;
#endif
-static unsigned long get_lockd_grace_period(void)
+static unsigned long get_lockd_grace_period(struct net *net)
{
+ struct lockd_net *ln = net_generic(net, lockd_net_id);
+
+ /* Return the net-ns specific grace period, if there is one */
+ if (ln->gracetime)
+ return ln->gracetime * HZ;
+
/* Note: nlm_timeout should always be nonzero */
if (nlm_grace_period)
return roundup(nlm_grace_period, nlm_timeout) * HZ;
static void set_grace_period(struct net *net)
{
- unsigned long grace_period = get_lockd_grace_period();
+ unsigned long grace_period = get_lockd_grace_period(net);
struct lockd_net *ln = net_generic(net, lockd_net_id);
locks_start_grace(net, &ln->lockd_manager);
static int create_lockd_family(struct svc_serv *serv, struct net *net,
const int family, const struct cred *cred)
{
+ struct lockd_net *ln = net_generic(net, lockd_net_id);
int err;
- err = create_lockd_listener(serv, "udp", net, family, nlm_udpport,
- cred);
+ err = create_lockd_listener(serv, "udp", net, family,
+ ln->udp_port ? ln->udp_port : nlm_udpport, cred);
if (err < 0)
return err;
- return create_lockd_listener(serv, "tcp", net, family, nlm_tcpport,
- cred);
+ return create_lockd_listener(serv, "tcp", net, family,
+ ln->tcp_port ? ln->tcp_port : nlm_tcpport, cred);
}
/*
if (err)
goto err_pernet;
+ err = genl_register_family(&lockd_nl_family);
+ if (err)
+ goto err_netlink;
+
err = lockd_create_procfs();
if (err)
goto err_procfs;
return 0;
err_procfs:
+ genl_unregister_family(&lockd_nl_family);
+err_netlink:
unregister_pernet_subsys(&lockd_net_ops);
err_pernet:
#ifdef CONFIG_SYSCTL
{
/* FIXME: delete all NLM clients */
nlm_shutdown_hosts();
+ genl_unregister_family(&lockd_nl_family);
lockd_remove_procfs();
unregister_pernet_subsys(&lockd_net_ops);
#ifdef CONFIG_SYSCTL
.pg_init_request = svc_generic_init_request,
.pg_rpcbind_set = svc_generic_rpcbind_set,
};
+
+/**
+ * lockd_nl_server_set_doit - set the lockd server parameters via netlink
+ * @skb: reply buffer
+ * @info: netlink metadata and command arguments
+ *
+ * This updates the per-net values. When updating the values in the init_net
+ * namespace, also update the "legacy" global values.
+ *
+ * Return 0 on success or a negative errno.
+ */
+int lockd_nl_server_set_doit(struct sk_buff *skb, struct genl_info *info)
+{
+ struct net *net = genl_info_net(info);
+ struct lockd_net *ln = net_generic(net, lockd_net_id);
+ const struct nlattr *attr;
+
+ if (GENL_REQ_ATTR_CHECK(info, LOCKD_A_SERVER_GRACETIME))
+ return -EINVAL;
+
+ if (info->attrs[LOCKD_A_SERVER_GRACETIME] ||
+ info->attrs[LOCKD_A_SERVER_TCP_PORT] ||
+ info->attrs[LOCKD_A_SERVER_UDP_PORT]) {
+ attr = info->attrs[LOCKD_A_SERVER_GRACETIME];
+ if (attr) {
+ u32 gracetime = nla_get_u32(attr);
+
+ if (gracetime > nlm_grace_period_max)
+ return -EINVAL;
+
+ ln->gracetime = gracetime;
+
+ if (net == &init_net)
+ nlm_grace_period = gracetime;
+ }
+
+ attr = info->attrs[LOCKD_A_SERVER_TCP_PORT];
+ if (attr) {
+ ln->tcp_port = nla_get_u16(attr);
+ if (net == &init_net)
+ nlm_tcpport = ln->tcp_port;
+ }
+
+ attr = info->attrs[LOCKD_A_SERVER_UDP_PORT];
+ if (attr) {
+ ln->udp_port = nla_get_u16(attr);
+ if (net == &init_net)
+ nlm_udpport = ln->udp_port;
+ }
+ }
+ return 0;
+}
+
+/**
+ * lockd_nl_server_get_doit - get lockd server parameters via netlink
+ * @skb: reply buffer
+ * @info: netlink metadata and command arguments
+ *
+ * Return 0 on success or a negative errno.
+ */
+int lockd_nl_server_get_doit(struct sk_buff *skb, struct genl_info *info)
+{
+ struct net *net = genl_info_net(info);
+ struct lockd_net *ln = net_generic(net, lockd_net_id);
+ void *hdr;
+ int err;
+
+ skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
+ if (!skb)
+ return -ENOMEM;
+
+ hdr = genlmsg_iput(skb, info);
+ if (!hdr) {
+ err = -EMSGSIZE;
+ goto err_free_msg;
+ }
+
+ err = nla_put_u32(skb, LOCKD_A_SERVER_GRACETIME, ln->gracetime) ||
+ nla_put_u16(skb, LOCKD_A_SERVER_TCP_PORT, ln->tcp_port) ||
+ nla_put_u16(skb, LOCKD_A_SERVER_UDP_PORT, ln->udp_port);
+ if (err)
+ goto err_free_msg;
+
+ genlmsg_end(skb, hdr);
+
+ return genlmsg_reply(skb, info);
+err_free_msg:
+ nlmsg_free(skb);
+
+ return err;
+}
projects / linux-block.git / commitdiff