v4.19.13 snapshot.
diff --git a/drivers/net/netdevsim/devlink.c b/drivers/net/netdevsim/devlink.c
new file mode 100644
index 0000000..5135fc3
--- /dev/null
+++ b/drivers/net/netdevsim/devlink.c
@@ -0,0 +1,295 @@
+/*
+ * Copyright (c) 2018 Cumulus Networks. All rights reserved.
+ * Copyright (c) 2018 David Ahern <dsa@cumulusnetworks.com>
+ *
+ * This software is licensed under the GNU General License Version 2,
+ * June 1991 as shown in the file COPYING in the top-level directory of this
+ * source tree.
+ *
+ * THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS"
+ * WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
+ * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE
+ * OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME
+ * THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+ */
+
+#include <linux/device.h>
+#include <net/devlink.h>
+#include <net/netns/generic.h>
+
+#include "netdevsim.h"
+
+static unsigned int nsim_devlink_id;
+
+/* place holder until devlink and namespaces is sorted out */
+static struct net *nsim_devlink_net(struct devlink *devlink)
+{
+ return &init_net;
+}
+
+/* IPv4
+ */
+static u64 nsim_ipv4_fib_resource_occ_get(void *priv)
+{
+ struct net *net = priv;
+
+ return nsim_fib_get_val(net, NSIM_RESOURCE_IPV4_FIB, false);
+}
+
+static u64 nsim_ipv4_fib_rules_res_occ_get(void *priv)
+{
+ struct net *net = priv;
+
+ return nsim_fib_get_val(net, NSIM_RESOURCE_IPV4_FIB_RULES, false);
+}
+
+/* IPv6
+ */
+static u64 nsim_ipv6_fib_resource_occ_get(void *priv)
+{
+ struct net *net = priv;
+
+ return nsim_fib_get_val(net, NSIM_RESOURCE_IPV6_FIB, false);
+}
+
+static u64 nsim_ipv6_fib_rules_res_occ_get(void *priv)
+{
+ struct net *net = priv;
+
+ return nsim_fib_get_val(net, NSIM_RESOURCE_IPV6_FIB_RULES, false);
+}
+
+static int devlink_resources_register(struct devlink *devlink)
+{
+ struct devlink_resource_size_params params = {
+ .size_max = (u64)-1,
+ .size_granularity = 1,
+ .unit = DEVLINK_RESOURCE_UNIT_ENTRY
+ };
+ struct net *net = nsim_devlink_net(devlink);
+ int err;
+ u64 n;
+
+ /* Resources for IPv4 */
+ err = devlink_resource_register(devlink, "IPv4", (u64)-1,
+ NSIM_RESOURCE_IPV4,
+ DEVLINK_RESOURCE_ID_PARENT_TOP,
+ ¶ms);
+ if (err) {
+ pr_err("Failed to register IPv4 top resource\n");
+ goto out;
+ }
+
+ n = nsim_fib_get_val(net, NSIM_RESOURCE_IPV4_FIB, true);
+ err = devlink_resource_register(devlink, "fib", n,
+ NSIM_RESOURCE_IPV4_FIB,
+ NSIM_RESOURCE_IPV4, ¶ms);
+ if (err) {
+ pr_err("Failed to register IPv4 FIB resource\n");
+ return err;
+ }
+
+ n = nsim_fib_get_val(net, NSIM_RESOURCE_IPV4_FIB_RULES, true);
+ err = devlink_resource_register(devlink, "fib-rules", n,
+ NSIM_RESOURCE_IPV4_FIB_RULES,
+ NSIM_RESOURCE_IPV4, ¶ms);
+ if (err) {
+ pr_err("Failed to register IPv4 FIB rules resource\n");
+ return err;
+ }
+
+ /* Resources for IPv6 */
+ err = devlink_resource_register(devlink, "IPv6", (u64)-1,
+ NSIM_RESOURCE_IPV6,
+ DEVLINK_RESOURCE_ID_PARENT_TOP,
+ ¶ms);
+ if (err) {
+ pr_err("Failed to register IPv6 top resource\n");
+ goto out;
+ }
+
+ n = nsim_fib_get_val(net, NSIM_RESOURCE_IPV6_FIB, true);
+ err = devlink_resource_register(devlink, "fib", n,
+ NSIM_RESOURCE_IPV6_FIB,
+ NSIM_RESOURCE_IPV6, ¶ms);
+ if (err) {
+ pr_err("Failed to register IPv6 FIB resource\n");
+ return err;
+ }
+
+ n = nsim_fib_get_val(net, NSIM_RESOURCE_IPV6_FIB_RULES, true);
+ err = devlink_resource_register(devlink, "fib-rules", n,
+ NSIM_RESOURCE_IPV6_FIB_RULES,
+ NSIM_RESOURCE_IPV6, ¶ms);
+ if (err) {
+ pr_err("Failed to register IPv6 FIB rules resource\n");
+ return err;
+ }
+
+ devlink_resource_occ_get_register(devlink,
+ NSIM_RESOURCE_IPV4_FIB,
+ nsim_ipv4_fib_resource_occ_get,
+ net);
+ devlink_resource_occ_get_register(devlink,
+ NSIM_RESOURCE_IPV4_FIB_RULES,
+ nsim_ipv4_fib_rules_res_occ_get,
+ net);
+ devlink_resource_occ_get_register(devlink,
+ NSIM_RESOURCE_IPV6_FIB,
+ nsim_ipv6_fib_resource_occ_get,
+ net);
+ devlink_resource_occ_get_register(devlink,
+ NSIM_RESOURCE_IPV6_FIB_RULES,
+ nsim_ipv6_fib_rules_res_occ_get,
+ net);
+out:
+ return err;
+}
+
+static int nsim_devlink_reload(struct devlink *devlink,
+ struct netlink_ext_ack *extack)
+{
+ enum nsim_resource_id res_ids[] = {
+ NSIM_RESOURCE_IPV4_FIB, NSIM_RESOURCE_IPV4_FIB_RULES,
+ NSIM_RESOURCE_IPV6_FIB, NSIM_RESOURCE_IPV6_FIB_RULES
+ };
+ struct net *net = nsim_devlink_net(devlink);
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(res_ids); ++i) {
+ int err;
+ u64 val;
+
+ err = devlink_resource_size_get(devlink, res_ids[i], &val);
+ if (!err) {
+ err = nsim_fib_set_max(net, res_ids[i], val, extack);
+ if (err)
+ return err;
+ }
+ }
+
+ return 0;
+}
+
+static void nsim_devlink_net_reset(struct net *net)
+{
+ enum nsim_resource_id res_ids[] = {
+ NSIM_RESOURCE_IPV4_FIB, NSIM_RESOURCE_IPV4_FIB_RULES,
+ NSIM_RESOURCE_IPV6_FIB, NSIM_RESOURCE_IPV6_FIB_RULES
+ };
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(res_ids); ++i) {
+ if (nsim_fib_set_max(net, res_ids[i], (u64)-1, NULL)) {
+ pr_err("Failed to reset limit for resource %u\n",
+ res_ids[i]);
+ }
+ }
+}
+
+static const struct devlink_ops nsim_devlink_ops = {
+ .reload = nsim_devlink_reload,
+};
+
+/* once devlink / namespace issues are sorted out
+ * this needs to be net in which a devlink instance
+ * is to be created. e.g., dev_net(ns->netdev)
+ */
+static struct net *nsim_to_net(struct netdevsim *ns)
+{
+ return &init_net;
+}
+
+void nsim_devlink_teardown(struct netdevsim *ns)
+{
+ if (ns->devlink) {
+ struct net *net = nsim_to_net(ns);
+ bool *reg_devlink = net_generic(net, nsim_devlink_id);
+
+ devlink_resources_unregister(ns->devlink, NULL);
+ devlink_unregister(ns->devlink);
+ devlink_free(ns->devlink);
+ ns->devlink = NULL;
+
+ nsim_devlink_net_reset(net);
+ *reg_devlink = true;
+ }
+}
+
+int nsim_devlink_setup(struct netdevsim *ns)
+{
+ struct net *net = nsim_to_net(ns);
+ bool *reg_devlink = net_generic(net, nsim_devlink_id);
+ struct devlink *devlink;
+ int err;
+
+ /* only one device per namespace controls devlink */
+ if (!*reg_devlink) {
+ ns->devlink = NULL;
+ return 0;
+ }
+
+ devlink = devlink_alloc(&nsim_devlink_ops, 0);
+ if (!devlink)
+ return -ENOMEM;
+
+ err = devlink_register(devlink, &ns->dev);
+ if (err)
+ goto err_devlink_free;
+
+ err = devlink_resources_register(devlink);
+ if (err)
+ goto err_dl_unregister;
+
+ ns->devlink = devlink;
+
+ *reg_devlink = false;
+
+ return 0;
+
+err_dl_unregister:
+ devlink_unregister(devlink);
+err_devlink_free:
+ devlink_free(devlink);
+
+ return err;
+}
+
+/* Initialize per network namespace state */
+static int __net_init nsim_devlink_netns_init(struct net *net)
+{
+ bool *reg_devlink = net_generic(net, nsim_devlink_id);
+
+ *reg_devlink = true;
+
+ return 0;
+}
+
+static struct pernet_operations nsim_devlink_net_ops = {
+ .init = nsim_devlink_netns_init,
+ .id = &nsim_devlink_id,
+ .size = sizeof(bool),
+};
+
+void nsim_devlink_exit(void)
+{
+ unregister_pernet_subsys(&nsim_devlink_net_ops);
+ nsim_fib_exit();
+}
+
+int nsim_devlink_init(void)
+{
+ int err;
+
+ err = nsim_fib_init();
+ if (err)
+ goto err_out;
+
+ err = register_pernet_subsys(&nsim_devlink_net_ops);
+ if (err)
+ nsim_fib_exit();
+
+err_out:
+ return err;
+}