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/*
* 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 <linux/rtnetlink.h>
#include <net/devlink.h>
#include "netdevsim.h"
struct nsim_devlink {
struct nsim_fib_data *fib_data;
};
/* IPv4
*/
static u64 nsim_ipv4_fib_resource_occ_get(void *priv)
{
struct nsim_devlink *nsim_devlink = priv;
return nsim_fib_get_val(nsim_devlink->fib_data,
NSIM_RESOURCE_IPV4_FIB, false);
}
static u64 nsim_ipv4_fib_rules_res_occ_get(void *priv)
{
struct nsim_devlink *nsim_devlink = priv;
return nsim_fib_get_val(nsim_devlink->fib_data,
NSIM_RESOURCE_IPV4_FIB_RULES, false);
}
/* IPv6
*/
static u64 nsim_ipv6_fib_resource_occ_get(void *priv)
{
struct nsim_devlink *nsim_devlink = priv;
return nsim_fib_get_val(nsim_devlink->fib_data,
NSIM_RESOURCE_IPV6_FIB, false);
}
static u64 nsim_ipv6_fib_rules_res_occ_get(void *priv)
{
struct nsim_devlink *nsim_devlink = priv;
return nsim_fib_get_val(nsim_devlink->fib_data,
NSIM_RESOURCE_IPV6_FIB_RULES, false);
}
static int devlink_resources_register(struct devlink *devlink)
{
struct nsim_devlink *nsim_devlink = devlink_priv(devlink);
struct devlink_resource_size_params params = {
.size_max = (u64)-1,
.size_granularity = 1,
.unit = DEVLINK_RESOURCE_UNIT_ENTRY
};
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(nsim_devlink->fib_data,
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(nsim_devlink->fib_data,
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(nsim_devlink->fib_data,
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(nsim_devlink->fib_data,
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,
nsim_devlink);
devlink_resource_occ_get_register(devlink,
NSIM_RESOURCE_IPV4_FIB_RULES,
nsim_ipv4_fib_rules_res_occ_get,
nsim_devlink);
devlink_resource_occ_get_register(devlink,
NSIM_RESOURCE_IPV6_FIB,
nsim_ipv6_fib_resource_occ_get,
nsim_devlink);
devlink_resource_occ_get_register(devlink,
NSIM_RESOURCE_IPV6_FIB_RULES,
nsim_ipv6_fib_rules_res_occ_get,
nsim_devlink);
out:
return err;
}
static int nsim_devlink_reload(struct devlink *devlink,
struct netlink_ext_ack *extack)
{
struct nsim_devlink *nsim_devlink = devlink_priv(devlink);
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) {
int err;
u64 val;
err = devlink_resource_size_get(devlink, res_ids[i], &val);
if (!err) {
err = nsim_fib_set_max(nsim_devlink->fib_data,
res_ids[i], val, extack);
if (err)
return err;
}
}
return 0;
}
static const struct devlink_ops nsim_devlink_ops = {
.reload = nsim_devlink_reload,
};
static int __nsim_devlink_init(struct netdevsim *ns)
{
struct nsim_devlink *nsim_devlink;
struct devlink *devlink;
int err;
devlink = devlink_alloc(&nsim_devlink_ops, sizeof(*nsim_devlink));
if (!devlink)
return -ENOMEM;
nsim_devlink = devlink_priv(devlink);
nsim_devlink->fib_data = nsim_fib_create();
if (IS_ERR(nsim_devlink->fib_data)) {
err = PTR_ERR(nsim_devlink->fib_data);
goto err_devlink_free;
}
err = devlink_resources_register(devlink);
if (err)
goto err_fib_destroy;
err = devlink_register(devlink, &ns->dev);
if (err)
goto err_resources_unregister;
ns->devlink = devlink;
return 0;
err_resources_unregister:
devlink_resources_unregister(devlink, NULL);
err_fib_destroy:
nsim_fib_destroy(nsim_devlink->fib_data);
err_devlink_free:
devlink_free(devlink);
return err;
}
int nsim_devlink_init(struct netdevsim *ns)
{
int err;
dev_hold(ns->netdev);
rtnl_unlock();
err = __nsim_devlink_init(ns);
rtnl_lock();
dev_put(ns->netdev);
return err;
}
void nsim_devlink_exit(struct netdevsim *ns)
{
struct devlink *devlink = ns->devlink;
struct nsim_devlink *nsim_devlink = devlink_priv(devlink);
devlink_unregister(devlink);
devlink_resources_unregister(devlink, NULL);
nsim_fib_destroy(nsim_devlink->fib_data);
devlink_free(devlink);
}
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