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|
/*
* Copyright (C) 2017 Netronome Systems, Inc.
*
* 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/debugfs.h>
#include <linux/etherdevice.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/netdevice.h>
#include <linux/slab.h>
#include <net/netlink.h>
#include <net/pkt_cls.h>
#include <net/rtnetlink.h>
#include "netdevsim.h"
static u32 nsim_dev_id;
struct nsim_vf_config {
int link_state;
u16 min_tx_rate;
u16 max_tx_rate;
u16 vlan;
__be16 vlan_proto;
u16 qos;
u8 vf_mac[ETH_ALEN];
bool spoofchk_enabled;
bool trusted;
bool rss_query_enabled;
};
static struct dentry *nsim_ddir;
static int nsim_num_vf(struct device *dev)
{
struct netdevsim *ns = to_nsim(dev);
return ns->num_vfs;
}
static struct bus_type nsim_bus = {
.name = DRV_NAME,
.dev_name = DRV_NAME,
.num_vf = nsim_num_vf,
};
static int nsim_vfs_enable(struct netdevsim *ns, unsigned int num_vfs)
{
ns->vfconfigs = kcalloc(num_vfs, sizeof(struct nsim_vf_config),
GFP_KERNEL);
if (!ns->vfconfigs)
return -ENOMEM;
ns->num_vfs = num_vfs;
return 0;
}
static void nsim_vfs_disable(struct netdevsim *ns)
{
kfree(ns->vfconfigs);
ns->vfconfigs = NULL;
ns->num_vfs = 0;
}
static ssize_t
nsim_numvfs_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct netdevsim *ns = to_nsim(dev);
unsigned int num_vfs;
int ret;
ret = kstrtouint(buf, 0, &num_vfs);
if (ret)
return ret;
rtnl_lock();
if (ns->num_vfs == num_vfs)
goto exit_good;
if (ns->num_vfs && num_vfs) {
ret = -EBUSY;
goto exit_unlock;
}
if (num_vfs) {
ret = nsim_vfs_enable(ns, num_vfs);
if (ret)
goto exit_unlock;
} else {
nsim_vfs_disable(ns);
}
exit_good:
ret = count;
exit_unlock:
rtnl_unlock();
return ret;
}
static ssize_t
nsim_numvfs_show(struct device *dev, struct device_attribute *attr, char *buf)
{
struct netdevsim *ns = to_nsim(dev);
return sprintf(buf, "%u\n", ns->num_vfs);
}
static struct device_attribute nsim_numvfs_attr =
__ATTR(sriov_numvfs, 0664, nsim_numvfs_show, nsim_numvfs_store);
static struct attribute *nsim_dev_attrs[] = {
&nsim_numvfs_attr.attr,
NULL,
};
static const struct attribute_group nsim_dev_attr_group = {
.attrs = nsim_dev_attrs,
};
static const struct attribute_group *nsim_dev_attr_groups[] = {
&nsim_dev_attr_group,
NULL,
};
static void nsim_dev_release(struct device *dev)
{
struct netdevsim *ns = to_nsim(dev);
nsim_vfs_disable(ns);
}
static struct device_type nsim_dev_type = {
.groups = nsim_dev_attr_groups,
.release = nsim_dev_release,
};
static int nsim_get_port_parent_id(struct net_device *dev,
struct netdev_phys_item_id *ppid)
{
struct netdevsim *ns = netdev_priv(dev);
ppid->id_len = sizeof(ns->sdev->switch_id);
memcpy(&ppid->id, &ns->sdev->switch_id, ppid->id_len);
return 0;
}
static int nsim_init(struct net_device *dev)
{
struct netdevsim *ns = netdev_priv(dev);
char sdev_link_name[32];
int err;
ns->ddir = debugfs_create_dir(netdev_name(dev), nsim_ddir);
if (IS_ERR_OR_NULL(ns->ddir))
return -ENOMEM;
sprintf(sdev_link_name, "../../" DRV_NAME "_sdev/%u",
ns->sdev->switch_id);
debugfs_create_symlink("sdev", ns->ddir, sdev_link_name);
err = nsim_bpf_init(ns);
if (err)
goto err_debugfs_destroy;
nsim_ipsec_init(ns);
return 0;
err_debugfs_destroy:
debugfs_remove_recursive(ns->ddir);
return err;
}
static void nsim_uninit(struct net_device *dev)
{
struct netdevsim *ns = netdev_priv(dev);
nsim_ipsec_teardown(ns);
debugfs_remove_recursive(ns->ddir);
nsim_bpf_uninit(ns);
}
static void nsim_free(struct net_device *dev)
{
struct netdevsim *ns = netdev_priv(dev);
nsim_devlink_exit(ns);
device_unregister(&ns->dev);
/* netdev and vf state will be freed out of device_release() */
nsim_sdev_put(ns->sdev);
}
static netdev_tx_t nsim_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct netdevsim *ns = netdev_priv(dev);
if (!nsim_ipsec_tx(ns, skb))
goto out;
u64_stats_update_begin(&ns->syncp);
ns->tx_packets++;
ns->tx_bytes += skb->len;
u64_stats_update_end(&ns->syncp);
out:
dev_kfree_skb(skb);
return NETDEV_TX_OK;
}
static void nsim_set_rx_mode(struct net_device *dev)
{
}
static int nsim_change_mtu(struct net_device *dev, int new_mtu)
{
struct netdevsim *ns = netdev_priv(dev);
if (ns->xdp.prog && new_mtu > NSIM_XDP_MAX_MTU)
return -EBUSY;
dev->mtu = new_mtu;
return 0;
}
static void
nsim_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
{
struct netdevsim *ns = netdev_priv(dev);
unsigned int start;
do {
start = u64_stats_fetch_begin(&ns->syncp);
stats->tx_bytes = ns->tx_bytes;
stats->tx_packets = ns->tx_packets;
} while (u64_stats_fetch_retry(&ns->syncp, start));
}
static int
nsim_setup_tc_block_cb(enum tc_setup_type type, void *type_data, void *cb_priv)
{
return nsim_bpf_setup_tc_block_cb(type, type_data, cb_priv);
}
static int
nsim_setup_tc_block
|