![Stephen Hemminger](/assets/img/avatar_default.png)
The hyper-v transparent bonding should have used master_dev_link.
The netvsc device should look like a master bond device not
like the upper side of a tunnel.
This makes the semantics the same so that userspace applications
looking at network devices see the correct master relationshipship.
Fixes: 0c195567a8
("netvsc: transparent VF management")
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2237 lines
56 KiB
C
2237 lines
56 KiB
C
/*
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* Copyright (c) 2009, Microsoft Corporation.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, see <http://www.gnu.org/licenses/>.
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*
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* Authors:
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* Haiyang Zhang <haiyangz@microsoft.com>
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* Hank Janssen <hjanssen@microsoft.com>
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/init.h>
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#include <linux/atomic.h>
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#include <linux/module.h>
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#include <linux/highmem.h>
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#include <linux/device.h>
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#include <linux/io.h>
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#include <linux/delay.h>
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#include <linux/netdevice.h>
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#include <linux/inetdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/skbuff.h>
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#include <linux/if_vlan.h>
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#include <linux/in.h>
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#include <linux/slab.h>
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#include <linux/rtnetlink.h>
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#include <linux/netpoll.h>
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#include <linux/reciprocal_div.h>
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#include <net/arp.h>
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#include <net/route.h>
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#include <net/sock.h>
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#include <net/pkt_sched.h>
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#include <net/checksum.h>
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#include <net/ip6_checksum.h>
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#include "hyperv_net.h"
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#define RING_SIZE_MIN 64
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#define RETRY_US_LO 5000
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#define RETRY_US_HI 10000
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#define RETRY_MAX 2000 /* >10 sec */
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#define LINKCHANGE_INT (2 * HZ)
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#define VF_TAKEOVER_INT (HZ / 10)
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static unsigned int ring_size __ro_after_init = 128;
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module_param(ring_size, uint, 0444);
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MODULE_PARM_DESC(ring_size, "Ring buffer size (# of pages)");
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unsigned int netvsc_ring_bytes __ro_after_init;
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struct reciprocal_value netvsc_ring_reciprocal __ro_after_init;
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static const u32 default_msg = NETIF_MSG_DRV | NETIF_MSG_PROBE |
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NETIF_MSG_LINK | NETIF_MSG_IFUP |
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NETIF_MSG_IFDOWN | NETIF_MSG_RX_ERR |
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NETIF_MSG_TX_ERR;
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static int debug = -1;
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module_param(debug, int, 0444);
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MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
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static void netvsc_change_rx_flags(struct net_device *net, int change)
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{
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struct net_device_context *ndev_ctx = netdev_priv(net);
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struct net_device *vf_netdev = rtnl_dereference(ndev_ctx->vf_netdev);
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int inc;
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if (!vf_netdev)
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return;
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if (change & IFF_PROMISC) {
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inc = (net->flags & IFF_PROMISC) ? 1 : -1;
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dev_set_promiscuity(vf_netdev, inc);
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}
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if (change & IFF_ALLMULTI) {
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inc = (net->flags & IFF_ALLMULTI) ? 1 : -1;
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dev_set_allmulti(vf_netdev, inc);
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}
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}
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static void netvsc_set_rx_mode(struct net_device *net)
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{
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struct net_device_context *ndev_ctx = netdev_priv(net);
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struct net_device *vf_netdev;
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struct netvsc_device *nvdev;
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rcu_read_lock();
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vf_netdev = rcu_dereference(ndev_ctx->vf_netdev);
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if (vf_netdev) {
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dev_uc_sync(vf_netdev, net);
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dev_mc_sync(vf_netdev, net);
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}
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nvdev = rcu_dereference(ndev_ctx->nvdev);
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if (nvdev)
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rndis_filter_update(nvdev);
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rcu_read_unlock();
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}
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static int netvsc_open(struct net_device *net)
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{
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struct net_device_context *ndev_ctx = netdev_priv(net);
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struct net_device *vf_netdev = rtnl_dereference(ndev_ctx->vf_netdev);
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struct netvsc_device *nvdev = rtnl_dereference(ndev_ctx->nvdev);
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struct rndis_device *rdev;
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int ret = 0;
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netif_carrier_off(net);
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/* Open up the device */
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ret = rndis_filter_open(nvdev);
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if (ret != 0) {
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netdev_err(net, "unable to open device (ret %d).\n", ret);
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return ret;
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}
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rdev = nvdev->extension;
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if (!rdev->link_state)
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netif_carrier_on(net);
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if (vf_netdev) {
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/* Setting synthetic device up transparently sets
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* slave as up. If open fails, then slave will be
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* still be offline (and not used).
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*/
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ret = dev_open(vf_netdev);
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if (ret)
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netdev_warn(net,
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"unable to open slave: %s: %d\n",
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vf_netdev->name, ret);
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}
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return 0;
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}
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static int netvsc_wait_until_empty(struct netvsc_device *nvdev)
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{
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unsigned int retry = 0;
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int i;
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/* Ensure pending bytes in ring are read */
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for (;;) {
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u32 aread = 0;
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for (i = 0; i < nvdev->num_chn; i++) {
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struct vmbus_channel *chn
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= nvdev->chan_table[i].channel;
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if (!chn)
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continue;
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/* make sure receive not running now */
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napi_synchronize(&nvdev->chan_table[i].napi);
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aread = hv_get_bytes_to_read(&chn->inbound);
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if (aread)
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break;
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aread = hv_get_bytes_to_read(&chn->outbound);
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if (aread)
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break;
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}
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if (aread == 0)
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return 0;
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if (++retry > RETRY_MAX)
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return -ETIMEDOUT;
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usleep_range(RETRY_US_LO, RETRY_US_HI);
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}
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}
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static int netvsc_close(struct net_device *net)
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{
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struct net_device_context *net_device_ctx = netdev_priv(net);
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struct net_device *vf_netdev
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= rtnl_dereference(net_device_ctx->vf_netdev);
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struct netvsc_device *nvdev = rtnl_dereference(net_device_ctx->nvdev);
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int ret;
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netif_tx_disable(net);
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/* No need to close rndis filter if it is removed already */
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if (!nvdev)
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return 0;
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ret = rndis_filter_close(nvdev);
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if (ret != 0) {
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netdev_err(net, "unable to close device (ret %d).\n", ret);
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return ret;
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}
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ret = netvsc_wait_until_empty(nvdev);
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if (ret)
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netdev_err(net, "Ring buffer not empty after closing rndis\n");
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if (vf_netdev)
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dev_close(vf_netdev);
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return ret;
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}
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static inline void *init_ppi_data(struct rndis_message *msg,
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u32 ppi_size, u32 pkt_type)
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{
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struct rndis_packet *rndis_pkt = &msg->msg.pkt;
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struct rndis_per_packet_info *ppi;
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rndis_pkt->data_offset += ppi_size;
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ppi = (void *)rndis_pkt + rndis_pkt->per_pkt_info_offset
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+ rndis_pkt->per_pkt_info_len;
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ppi->size = ppi_size;
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ppi->type = pkt_type;
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ppi->ppi_offset = sizeof(struct rndis_per_packet_info);
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rndis_pkt->per_pkt_info_len += ppi_size;
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return ppi + 1;
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}
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/* Azure hosts don't support non-TCP port numbers in hashing for fragmented
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* packets. We can use ethtool to change UDP hash level when necessary.
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*/
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static inline u32 netvsc_get_hash(
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struct sk_buff *skb,
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const struct net_device_context *ndc)
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{
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struct flow_keys flow;
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u32 hash, pkt_proto = 0;
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static u32 hashrnd __read_mostly;
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net_get_random_once(&hashrnd, sizeof(hashrnd));
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if (!skb_flow_dissect_flow_keys(skb, &flow, 0))
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return 0;
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switch (flow.basic.ip_proto) {
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case IPPROTO_TCP:
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if (flow.basic.n_proto == htons(ETH_P_IP))
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pkt_proto = HV_TCP4_L4HASH;
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else if (flow.basic.n_proto == htons(ETH_P_IPV6))
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pkt_proto = HV_TCP6_L4HASH;
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break;
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case IPPROTO_UDP:
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if (flow.basic.n_proto == htons(ETH_P_IP))
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pkt_proto = HV_UDP4_L4HASH;
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else if (flow.basic.n_proto == htons(ETH_P_IPV6))
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pkt_proto = HV_UDP6_L4HASH;
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break;
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}
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if (pkt_proto & ndc->l4_hash) {
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return skb_get_hash(skb);
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} else {
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if (flow.basic.n_proto == htons(ETH_P_IP))
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hash = jhash2((u32 *)&flow.addrs.v4addrs, 2, hashrnd);
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else if (flow.basic.n_proto == htons(ETH_P_IPV6))
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hash = jhash2((u32 *)&flow.addrs.v6addrs, 8, hashrnd);
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else
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hash = 0;
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skb_set_hash(skb, hash, PKT_HASH_TYPE_L3);
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}
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return hash;
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}
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static inline int netvsc_get_tx_queue(struct net_device *ndev,
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struct sk_buff *skb, int old_idx)
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{
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const struct net_device_context *ndc = netdev_priv(ndev);
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struct sock *sk = skb->sk;
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int q_idx;
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q_idx = ndc->tx_table[netvsc_get_hash(skb, ndc) &
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(VRSS_SEND_TAB_SIZE - 1)];
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/* If queue index changed record the new value */
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if (q_idx != old_idx &&
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sk && sk_fullsock(sk) && rcu_access_pointer(sk->sk_dst_cache))
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sk_tx_queue_set(sk, q_idx);
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return q_idx;
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}
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/*
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* Select queue for transmit.
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*
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* If a valid queue has already been assigned, then use that.
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* Otherwise compute tx queue based on hash and the send table.
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*
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* This is basically similar to default (__netdev_pick_tx) with the added step
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* of using the host send_table when no other queue has been assigned.
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*
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* TODO support XPS - but get_xps_queue not exported
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*/
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static u16 netvsc_pick_tx(struct net_device *ndev, struct sk_buff *skb)
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{
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int q_idx = sk_tx_queue_get(skb->sk);
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if (q_idx < 0 || skb->ooo_okay || q_idx >= ndev->real_num_tx_queues) {
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/* If forwarding a packet, we use the recorded queue when
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* available for better cache locality.
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*/
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if (skb_rx_queue_recorded(skb))
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q_idx = skb_get_rx_queue(skb);
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else
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q_idx = netvsc_get_tx_queue(ndev, skb, q_idx);
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}
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return q_idx;
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}
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static u16 netvsc_select_queue(struct net_device *ndev, struct sk_buff *skb,
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void *accel_priv,
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select_queue_fallback_t fallback)
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{
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struct net_device_context *ndc = netdev_priv(ndev);
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struct net_device *vf_netdev;
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u16 txq;
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rcu_read_lock();
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vf_netdev = rcu_dereference(ndc->vf_netdev);
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if (vf_netdev) {
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const struct net_device_ops *vf_ops = vf_netdev->netdev_ops;
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if (vf_ops->ndo_select_queue)
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txq = vf_ops->ndo_select_queue(vf_netdev, skb,
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accel_priv, fallback);
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else
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txq = fallback(vf_netdev, skb);
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/* Record the queue selected by VF so that it can be
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* used for common case where VF has more queues than
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* the synthetic device.
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*/
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qdisc_skb_cb(skb)->slave_dev_queue_mapping = txq;
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} else {
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txq = netvsc_pick_tx(ndev, skb);
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}
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rcu_read_unlock();
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while (unlikely(txq >= ndev->real_num_tx_queues))
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txq -= ndev->real_num_tx_queues;
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return txq;
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}
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static u32 fill_pg_buf(struct page *page, u32 offset, u32 len,
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struct hv_page_buffer *pb)
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{
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int j = 0;
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/* Deal with compund pages by ignoring unused part
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* of the page.
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*/
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page += (offset >> PAGE_SHIFT);
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offset &= ~PAGE_MASK;
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while (len > 0) {
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unsigned long bytes;
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bytes = PAGE_SIZE - offset;
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if (bytes > len)
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bytes = len;
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pb[j].pfn = page_to_pfn(page);
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pb[j].offset = offset;
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pb[j].len = bytes;
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offset += bytes;
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len -= bytes;
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if (offset == PAGE_SIZE && len) {
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page++;
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offset = 0;
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j++;
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}
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}
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return j + 1;
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}
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static u32 init_page_array(void *hdr, u32 len, struct sk_buff *skb,
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struct hv_netvsc_packet *packet,
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struct hv_page_buffer *pb)
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{
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u32 slots_used = 0;
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char *data = skb->data;
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int frags = skb_shinfo(skb)->nr_frags;
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int i;
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/* The packet is laid out thus:
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* 1. hdr: RNDIS header and PPI
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* 2. skb linear data
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* 3. skb fragment data
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*/
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slots_used += fill_pg_buf(virt_to_page(hdr),
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offset_in_page(hdr),
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len, &pb[slots_used]);
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packet->rmsg_size = len;
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packet->rmsg_pgcnt = slots_used;
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slots_used += fill_pg_buf(virt_to_page(data),
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offset_in_page(data),
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skb_headlen(skb), &pb[slots_used]);
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for (i = 0; i < frags; i++) {
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skb_frag_t *frag = skb_shinfo(skb)->frags + i;
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slots_used += fill_pg_buf(skb_frag_page(frag),
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frag->page_offset,
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skb_frag_size(frag), &pb[slots_used]);
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}
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return slots_used;
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}
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static int count_skb_frag_slots(struct sk_buff *skb)
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{
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int i, frags = skb_shinfo(skb)->nr_frags;
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int pages = 0;
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for (i = 0; i < frags; i++) {
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skb_frag_t *frag = skb_shinfo(skb)->frags + i;
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unsigned long size = skb_frag_size(frag);
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unsigned long offset = frag->page_offset;
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/* Skip unused frames from start of page */
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offset &= ~PAGE_MASK;
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pages += PFN_UP(offset + size);
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}
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return pages;
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}
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static int netvsc_get_slots(struct sk_buff *skb)
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{
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char *data = skb->data;
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unsigned int offset = offset_in_page(data);
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unsigned int len = skb_headlen(skb);
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int slots;
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int frag_slots;
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slots = DIV_ROUND_UP(offset + len, PAGE_SIZE);
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frag_slots = count_skb_frag_slots(skb);
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return slots + frag_slots;
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}
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static u32 net_checksum_info(struct sk_buff *skb)
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{
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if (skb->protocol == htons(ETH_P_IP)) {
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struct iphdr *ip = ip_hdr(skb);
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if (ip->protocol == IPPROTO_TCP)
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return TRANSPORT_INFO_IPV4_TCP;
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else if (ip->protocol == IPPROTO_UDP)
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return TRANSPORT_INFO_IPV4_UDP;
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} else {
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struct ipv6hdr *ip6 = ipv6_hdr(skb);
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if (ip6->nexthdr == IPPROTO_TCP)
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return TRANSPORT_INFO_IPV6_TCP;
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else if (ip6->nexthdr == IPPROTO_UDP)
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return TRANSPORT_INFO_IPV6_UDP;
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}
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return TRANSPORT_INFO_NOT_IP;
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}
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/* Send skb on the slave VF device. */
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static int netvsc_vf_xmit(struct net_device *net, struct net_device *vf_netdev,
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struct sk_buff *skb)
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{
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struct net_device_context *ndev_ctx = netdev_priv(net);
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unsigned int len = skb->len;
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int rc;
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skb->dev = vf_netdev;
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skb->queue_mapping = qdisc_skb_cb(skb)->slave_dev_queue_mapping;
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rc = dev_queue_xmit(skb);
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if (likely(rc == NET_XMIT_SUCCESS || rc == NET_XMIT_CN)) {
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struct netvsc_vf_pcpu_stats *pcpu_stats
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= this_cpu_ptr(ndev_ctx->vf_stats);
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|
|
|
u64_stats_update_begin(&pcpu_stats->syncp);
|
|
pcpu_stats->tx_packets++;
|
|
pcpu_stats->tx_bytes += len;
|
|
u64_stats_update_end(&pcpu_stats->syncp);
|
|
} else {
|
|
this_cpu_inc(ndev_ctx->vf_stats->tx_dropped);
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
static int netvsc_start_xmit(struct sk_buff *skb, struct net_device *net)
|
|
{
|
|
struct net_device_context *net_device_ctx = netdev_priv(net);
|
|
struct hv_netvsc_packet *packet = NULL;
|
|
int ret;
|
|
unsigned int num_data_pgs;
|
|
struct rndis_message *rndis_msg;
|
|
struct net_device *vf_netdev;
|
|
u32 rndis_msg_size;
|
|
u32 hash;
|
|
struct hv_page_buffer pb[MAX_PAGE_BUFFER_COUNT];
|
|
|
|
/* if VF is present and up then redirect packets
|
|
* already called with rcu_read_lock_bh
|
|
*/
|
|
vf_netdev = rcu_dereference_bh(net_device_ctx->vf_netdev);
|
|
if (vf_netdev && netif_running(vf_netdev) &&
|
|
!netpoll_tx_running(net))
|
|
return netvsc_vf_xmit(net, vf_netdev, skb);
|
|
|
|
/* We will atmost need two pages to describe the rndis
|
|
* header. We can only transmit MAX_PAGE_BUFFER_COUNT number
|
|
* of pages in a single packet. If skb is scattered around
|
|
* more pages we try linearizing it.
|
|
*/
|
|
|
|
num_data_pgs = netvsc_get_slots(skb) + 2;
|
|
|
|
if (unlikely(num_data_pgs > MAX_PAGE_BUFFER_COUNT)) {
|
|
++net_device_ctx->eth_stats.tx_scattered;
|
|
|
|
if (skb_linearize(skb))
|
|
goto no_memory;
|
|
|
|
num_data_pgs = netvsc_get_slots(skb) + 2;
|
|
if (num_data_pgs > MAX_PAGE_BUFFER_COUNT) {
|
|
++net_device_ctx->eth_stats.tx_too_big;
|
|
goto drop;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Place the rndis header in the skb head room and
|
|
* the skb->cb will be used for hv_netvsc_packet
|
|
* structure.
|
|
*/
|
|
ret = skb_cow_head(skb, RNDIS_AND_PPI_SIZE);
|
|
if (ret)
|
|
goto no_memory;
|
|
|
|
/* Use the skb control buffer for building up the packet */
|
|
BUILD_BUG_ON(sizeof(struct hv_netvsc_packet) >
|
|
FIELD_SIZEOF(struct sk_buff, cb));
|
|
packet = (struct hv_netvsc_packet *)skb->cb;
|
|
|
|
packet->q_idx = skb_get_queue_mapping(skb);
|
|
|
|
packet->total_data_buflen = skb->len;
|
|
packet->total_bytes = skb->len;
|
|
packet->total_packets = 1;
|
|
|
|
rndis_msg = (struct rndis_message *)skb->head;
|
|
|
|
/* Add the rndis header */
|
|
rndis_msg->ndis_msg_type = RNDIS_MSG_PACKET;
|
|
rndis_msg->msg_len = packet->total_data_buflen;
|
|
|
|
rndis_msg->msg.pkt = (struct rndis_packet) {
|
|
.data_offset = sizeof(struct rndis_packet),
|
|
.data_len = packet->total_data_buflen,
|
|
.per_pkt_info_offset = sizeof(struct rndis_packet),
|
|
};
|
|
|
|
rndis_msg_size = RNDIS_MESSAGE_SIZE(struct rndis_packet);
|
|
|
|
hash = skb_get_hash_raw(skb);
|
|
if (hash != 0 && net->real_num_tx_queues > 1) {
|
|
u32 *hash_info;
|
|
|
|
rndis_msg_size += NDIS_HASH_PPI_SIZE;
|
|
hash_info = init_ppi_data(rndis_msg, NDIS_HASH_PPI_SIZE,
|
|
NBL_HASH_VALUE);
|
|
*hash_info = hash;
|
|
}
|
|
|
|
if (skb_vlan_tag_present(skb)) {
|
|
struct ndis_pkt_8021q_info *vlan;
|
|
|
|
rndis_msg_size += NDIS_VLAN_PPI_SIZE;
|
|
vlan = init_ppi_data(rndis_msg, NDIS_VLAN_PPI_SIZE,
|
|
IEEE_8021Q_INFO);
|
|
|
|
vlan->value = 0;
|
|
vlan->vlanid = skb->vlan_tci & VLAN_VID_MASK;
|
|
vlan->pri = (skb->vlan_tci & VLAN_PRIO_MASK) >>
|
|
VLAN_PRIO_SHIFT;
|
|
}
|
|
|
|
if (skb_is_gso(skb)) {
|
|
struct ndis_tcp_lso_info *lso_info;
|
|
|
|
rndis_msg_size += NDIS_LSO_PPI_SIZE;
|
|
lso_info = init_ppi_data(rndis_msg, NDIS_LSO_PPI_SIZE,
|
|
TCP_LARGESEND_PKTINFO);
|
|
|
|
lso_info->value = 0;
|
|
lso_info->lso_v2_transmit.type = NDIS_TCP_LARGE_SEND_OFFLOAD_V2_TYPE;
|
|
if (skb->protocol == htons(ETH_P_IP)) {
|
|
lso_info->lso_v2_transmit.ip_version =
|
|
NDIS_TCP_LARGE_SEND_OFFLOAD_IPV4;
|
|
ip_hdr(skb)->tot_len = 0;
|
|
ip_hdr(skb)->check = 0;
|
|
tcp_hdr(skb)->check =
|
|
~csum_tcpudp_magic(ip_hdr(skb)->saddr,
|
|
ip_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
|
|
} else {
|
|
lso_info->lso_v2_transmit.ip_version =
|
|
NDIS_TCP_LARGE_SEND_OFFLOAD_IPV6;
|
|
ipv6_hdr(skb)->payload_len = 0;
|
|
tcp_hdr(skb)->check =
|
|
~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
|
|
&ipv6_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
|
|
}
|
|
lso_info->lso_v2_transmit.tcp_header_offset = skb_transport_offset(skb);
|
|
lso_info->lso_v2_transmit.mss = skb_shinfo(skb)->gso_size;
|
|
} else if (skb->ip_summed == CHECKSUM_PARTIAL) {
|
|
if (net_checksum_info(skb) & net_device_ctx->tx_checksum_mask) {
|
|
struct ndis_tcp_ip_checksum_info *csum_info;
|
|
|
|
rndis_msg_size += NDIS_CSUM_PPI_SIZE;
|
|
csum_info = init_ppi_data(rndis_msg, NDIS_CSUM_PPI_SIZE,
|
|
TCPIP_CHKSUM_PKTINFO);
|
|
|
|
csum_info->value = 0;
|
|
csum_info->transmit.tcp_header_offset = skb_transport_offset(skb);
|
|
|
|
if (skb->protocol == htons(ETH_P_IP)) {
|
|
csum_info->transmit.is_ipv4 = 1;
|
|
|
|
if (ip_hdr(skb)->protocol == IPPROTO_TCP)
|
|
csum_info->transmit.tcp_checksum = 1;
|
|
else
|
|
csum_info->transmit.udp_checksum = 1;
|
|
} else {
|
|
csum_info->transmit.is_ipv6 = 1;
|
|
|
|
if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
|
|
csum_info->transmit.tcp_checksum = 1;
|
|
else
|
|
csum_info->transmit.udp_checksum = 1;
|
|
}
|
|
} else {
|
|
/* Can't do offload of this type of checksum */
|
|
if (skb_checksum_help(skb))
|
|
goto drop;
|
|
}
|
|
}
|
|
|
|
/* Start filling in the page buffers with the rndis hdr */
|
|
rndis_msg->msg_len += rndis_msg_size;
|
|
packet->total_data_buflen = rndis_msg->msg_len;
|
|
packet->page_buf_cnt = init_page_array(rndis_msg, rndis_msg_size,
|
|
skb, packet, pb);
|
|
|
|
/* timestamp packet in software */
|
|
skb_tx_timestamp(skb);
|
|
|
|
ret = netvsc_send(net, packet, rndis_msg, pb, skb);
|
|
if (likely(ret == 0))
|
|
return NETDEV_TX_OK;
|
|
|
|
if (ret == -EAGAIN) {
|
|
++net_device_ctx->eth_stats.tx_busy;
|
|
return NETDEV_TX_BUSY;
|
|
}
|
|
|
|
if (ret == -ENOSPC)
|
|
++net_device_ctx->eth_stats.tx_no_space;
|
|
|
|
drop:
|
|
dev_kfree_skb_any(skb);
|
|
net->stats.tx_dropped++;
|
|
|
|
return NETDEV_TX_OK;
|
|
|
|
no_memory:
|
|
++net_device_ctx->eth_stats.tx_no_memory;
|
|
goto drop;
|
|
}
|
|
|
|
/*
|
|
* netvsc_linkstatus_callback - Link up/down notification
|
|
*/
|
|
void netvsc_linkstatus_callback(struct net_device *net,
|
|
struct rndis_message *resp)
|
|
{
|
|
struct rndis_indicate_status *indicate = &resp->msg.indicate_status;
|
|
struct net_device_context *ndev_ctx = netdev_priv(net);
|
|
struct netvsc_reconfig *event;
|
|
unsigned long flags;
|
|
|
|
/* Update the physical link speed when changing to another vSwitch */
|
|
if (indicate->status == RNDIS_STATUS_LINK_SPEED_CHANGE) {
|
|
u32 speed;
|
|
|
|
speed = *(u32 *)((void *)indicate
|
|
+ indicate->status_buf_offset) / 10000;
|
|
ndev_ctx->speed = speed;
|
|
return;
|
|
}
|
|
|
|
/* Handle these link change statuses below */
|
|
if (indicate->status != RNDIS_STATUS_NETWORK_CHANGE &&
|
|
indicate->status != RNDIS_STATUS_MEDIA_CONNECT &&
|
|
indicate->status != RNDIS_STATUS_MEDIA_DISCONNECT)
|
|
return;
|
|
|
|
if (net->reg_state != NETREG_REGISTERED)
|
|
return;
|
|
|
|
event = kzalloc(sizeof(*event), GFP_ATOMIC);
|
|
if (!event)
|
|
return;
|
|
event->event = indicate->status;
|
|
|
|
spin_lock_irqsave(&ndev_ctx->lock, flags);
|
|
list_add_tail(&event->list, &ndev_ctx->reconfig_events);
|
|
spin_unlock_irqrestore(&ndev_ctx->lock, flags);
|
|
|
|
schedule_delayed_work(&ndev_ctx->dwork, 0);
|
|
}
|
|
|
|
static struct sk_buff *netvsc_alloc_recv_skb(struct net_device *net,
|
|
struct napi_struct *napi,
|
|
const struct ndis_tcp_ip_checksum_info *csum_info,
|
|
const struct ndis_pkt_8021q_info *vlan,
|
|
void *data, u32 buflen)
|
|
{
|
|
struct sk_buff *skb;
|
|
|
|
skb = napi_alloc_skb(napi, buflen);
|
|
if (!skb)
|
|
return skb;
|
|
|
|
/*
|
|
* Copy to skb. This copy is needed here since the memory pointed by
|
|
* hv_netvsc_packet cannot be deallocated
|
|
*/
|
|
skb_put_data(skb, data, buflen);
|
|
|
|
skb->protocol = eth_type_trans(skb, net);
|
|
|
|
/* skb is already created with CHECKSUM_NONE */
|
|
skb_checksum_none_assert(skb);
|
|
|
|
/*
|
|
* In Linux, the IP checksum is always checked.
|
|
* Do L4 checksum offload if enabled and present.
|
|
*/
|
|
if (csum_info && (net->features & NETIF_F_RXCSUM)) {
|
|
if (csum_info->receive.tcp_checksum_succeeded ||
|
|
csum_info->receive.udp_checksum_succeeded)
|
|
skb->ip_summed = CHECKSUM_UNNECESSARY;
|
|
}
|
|
|
|
if (vlan) {
|
|
u16 vlan_tci = vlan->vlanid | (vlan->pri << VLAN_PRIO_SHIFT);
|
|
|
|
__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
|
|
vlan_tci);
|
|
}
|
|
|
|
return skb;
|
|
}
|
|
|
|
/*
|
|
* netvsc_recv_callback - Callback when we receive a packet from the
|
|
* "wire" on the specified device.
|
|
*/
|
|
int netvsc_recv_callback(struct net_device *net,
|
|
struct netvsc_device *net_device,
|
|
struct vmbus_channel *channel,
|
|
void *data, u32 len,
|
|
const struct ndis_tcp_ip_checksum_info *csum_info,
|
|
const struct ndis_pkt_8021q_info *vlan)
|
|
{
|
|
struct net_device_context *net_device_ctx = netdev_priv(net);
|
|
u16 q_idx = channel->offermsg.offer.sub_channel_index;
|
|
struct netvsc_channel *nvchan = &net_device->chan_table[q_idx];
|
|
struct sk_buff *skb;
|
|
struct netvsc_stats *rx_stats;
|
|
|
|
if (net->reg_state != NETREG_REGISTERED)
|
|
return NVSP_STAT_FAIL;
|
|
|
|
/* Allocate a skb - TODO direct I/O to pages? */
|
|
skb = netvsc_alloc_recv_skb(net, &nvchan->napi,
|
|
csum_info, vlan, data, len);
|
|
if (unlikely(!skb)) {
|
|
++net_device_ctx->eth_stats.rx_no_memory;
|
|
rcu_read_unlock();
|
|
return NVSP_STAT_FAIL;
|
|
}
|
|
|
|
skb_record_rx_queue(skb, q_idx);
|
|
|
|
/*
|
|
* Even if injecting the packet, record the statistics
|
|
* on the synthetic device because modifying the VF device
|
|
* statistics will not work correctly.
|
|
*/
|
|
rx_stats = &nvchan->rx_stats;
|
|
u64_stats_update_begin(&rx_stats->syncp);
|
|
rx_stats->packets++;
|
|
rx_stats->bytes += len;
|
|
|
|
if (skb->pkt_type == PACKET_BROADCAST)
|
|
++rx_stats->broadcast;
|
|
else if (skb->pkt_type == PACKET_MULTICAST)
|
|
++rx_stats->multicast;
|
|
u64_stats_update_end(&rx_stats->syncp);
|
|
|
|
napi_gro_receive(&nvchan->napi, skb);
|
|
return NVSP_STAT_SUCCESS;
|
|
}
|
|
|
|
static void netvsc_get_drvinfo(struct net_device *net,
|
|
struct ethtool_drvinfo *info)
|
|
{
|
|
strlcpy(info->driver, KBUILD_MODNAME, sizeof(info->driver));
|
|
strlcpy(info->fw_version, "N/A", sizeof(info->fw_version));
|
|
}
|
|
|
|
static void netvsc_get_channels(struct net_device *net,
|
|
struct ethtool_channels *channel)
|
|
{
|
|
struct net_device_context *net_device_ctx = netdev_priv(net);
|
|
struct netvsc_device *nvdev = rtnl_dereference(net_device_ctx->nvdev);
|
|
|
|
if (nvdev) {
|
|
channel->max_combined = nvdev->max_chn;
|
|
channel->combined_count = nvdev->num_chn;
|
|
}
|
|
}
|
|
|
|
static int netvsc_detach(struct net_device *ndev,
|
|
struct netvsc_device *nvdev)
|
|
{
|
|
struct net_device_context *ndev_ctx = netdev_priv(ndev);
|
|
struct hv_device *hdev = ndev_ctx->device_ctx;
|
|
int ret;
|
|
|
|
/* Don't try continuing to try and setup sub channels */
|
|
if (cancel_work_sync(&nvdev->subchan_work))
|
|
nvdev->num_chn = 1;
|
|
|
|
/* If device was up (receiving) then shutdown */
|
|
if (netif_running(ndev)) {
|
|
netif_tx_disable(ndev);
|
|
|
|
ret = rndis_filter_close(nvdev);
|
|
if (ret) {
|
|
netdev_err(ndev,
|
|
"unable to close device (ret %d).\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
ret = netvsc_wait_until_empty(nvdev);
|
|
if (ret) {
|
|
netdev_err(ndev,
|
|
"Ring buffer not empty after closing rndis\n");
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
netif_device_detach(ndev);
|
|
|
|
rndis_filter_device_remove(hdev, nvdev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int netvsc_attach(struct net_device *ndev,
|
|
struct netvsc_device_info *dev_info)
|
|
{
|
|
struct net_device_context *ndev_ctx = netdev_priv(ndev);
|
|
struct hv_device *hdev = ndev_ctx->device_ctx;
|
|
struct netvsc_device *nvdev;
|
|
struct rndis_device *rdev;
|
|
int ret;
|
|
|
|
nvdev = rndis_filter_device_add(hdev, dev_info);
|
|
if (IS_ERR(nvdev))
|
|
return PTR_ERR(nvdev);
|
|
|
|
/* Note: enable and attach happen when sub-channels setup */
|
|
|
|
netif_carrier_off(ndev);
|
|
|
|
if (netif_running(ndev)) {
|
|
ret = rndis_filter_open(nvdev);
|
|
if (ret)
|
|
return ret;
|
|
|
|
rdev = nvdev->extension;
|
|
if (!rdev->link_state)
|
|
netif_carrier_on(ndev);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int netvsc_set_channels(struct net_device *net,
|
|
struct ethtool_channels *channels)
|
|
{
|
|
struct net_device_context *net_device_ctx = netdev_priv(net);
|
|
struct netvsc_device *nvdev = rtnl_dereference(net_device_ctx->nvdev);
|
|
unsigned int orig, count = channels->combined_count;
|
|
struct netvsc_device_info device_info;
|
|
int ret;
|
|
|
|
/* We do not support separate count for rx, tx, or other */
|
|
if (count == 0 ||
|
|
channels->rx_count || channels->tx_count || channels->other_count)
|
|
return -EINVAL;
|
|
|
|
if (!nvdev || nvdev->destroy)
|
|
return -ENODEV;
|
|
|
|
if (nvdev->nvsp_version < NVSP_PROTOCOL_VERSION_5)
|
|
return -EINVAL;
|
|
|
|
if (count > nvdev->max_chn)
|
|
return -EINVAL;
|
|
|
|
orig = nvdev->num_chn;
|
|
|
|
memset(&device_info, 0, sizeof(device_info));
|
|
device_info.num_chn = count;
|
|
device_info.send_sections = nvdev->send_section_cnt;
|
|
device_info.send_section_size = nvdev->send_section_size;
|
|
device_info.recv_sections = nvdev->recv_section_cnt;
|
|
device_info.recv_section_size = nvdev->recv_section_size;
|
|
|
|
ret = netvsc_detach(net, nvdev);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = netvsc_attach(net, &device_info);
|
|
if (ret) {
|
|
device_info.num_chn = orig;
|
|
if (netvsc_attach(net, &device_info))
|
|
netdev_err(net, "restoring channel setting failed\n");
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static bool
|
|
netvsc_validate_ethtool_ss_cmd(const struct ethtool_link_ksettings *cmd)
|
|
{
|
|
struct ethtool_link_ksettings diff1 = *cmd;
|
|
struct ethtool_link_ksettings diff2 = {};
|
|
|
|
diff1.base.speed = 0;
|
|
diff1.base.duplex = 0;
|
|
/* advertising and cmd are usually set */
|
|
ethtool_link_ksettings_zero_link_mode(&diff1, advertising);
|
|
diff1.base.cmd = 0;
|
|
/* We set port to PORT_OTHER */
|
|
diff2.base.port = PORT_OTHER;
|
|
|
|
return !memcmp(&diff1, &diff2, sizeof(diff1));
|
|
}
|
|
|
|
static void netvsc_init_settings(struct net_device *dev)
|
|
{
|
|
struct net_device_context *ndc = netdev_priv(dev);
|
|
|
|
ndc->l4_hash = HV_DEFAULT_L4HASH;
|
|
|
|
ndc->speed = SPEED_UNKNOWN;
|
|
ndc->duplex = DUPLEX_FULL;
|
|
}
|
|
|
|
static int netvsc_get_link_ksettings(struct net_device *dev,
|
|
struct ethtool_link_ksettings *cmd)
|
|
{
|
|
struct net_device_context *ndc = netdev_priv(dev);
|
|
|
|
cmd->base.speed = ndc->speed;
|
|
cmd->base.duplex = ndc->duplex;
|
|
cmd->base.port = PORT_OTHER;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int netvsc_set_link_ksettings(struct net_device *dev,
|
|
const struct ethtool_link_ksettings *cmd)
|
|
{
|
|
struct net_device_context *ndc = netdev_priv(dev);
|
|
u32 speed;
|
|
|
|
speed = cmd->base.speed;
|
|
if (!ethtool_validate_speed(speed) ||
|
|
!ethtool_validate_duplex(cmd->base.duplex) ||
|
|
!netvsc_validate_ethtool_ss_cmd(cmd))
|
|
return -EINVAL;
|
|
|
|
ndc->speed = speed;
|
|
ndc->duplex = cmd->base.duplex;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int netvsc_change_mtu(struct net_device *ndev, int mtu)
|
|
{
|
|
struct net_device_context *ndevctx = netdev_priv(ndev);
|
|
struct net_device *vf_netdev = rtnl_dereference(ndevctx->vf_netdev);
|
|
struct netvsc_device *nvdev = rtnl_dereference(ndevctx->nvdev);
|
|
int orig_mtu = ndev->mtu;
|
|
struct netvsc_device_info device_info;
|
|
int ret = 0;
|
|
|
|
if (!nvdev || nvdev->destroy)
|
|
return -ENODEV;
|
|
|
|
/* Change MTU of underlying VF netdev first. */
|
|
if (vf_netdev) {
|
|
ret = dev_set_mtu(vf_netdev, mtu);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
memset(&device_info, 0, sizeof(device_info));
|
|
device_info.num_chn = nvdev->num_chn;
|
|
device_info.send_sections = nvdev->send_section_cnt;
|
|
device_info.send_section_size = nvdev->send_section_size;
|
|
device_info.recv_sections = nvdev->recv_section_cnt;
|
|
device_info.recv_section_size = nvdev->recv_section_size;
|
|
|
|
ret = netvsc_detach(ndev, nvdev);
|
|
if (ret)
|
|
goto rollback_vf;
|
|
|
|
ndev->mtu = mtu;
|
|
|
|
ret = netvsc_attach(ndev, &device_info);
|
|
if (ret)
|
|
goto rollback;
|
|
|
|
return 0;
|
|
|
|
rollback:
|
|
/* Attempt rollback to original MTU */
|
|
ndev->mtu = orig_mtu;
|
|
|
|
if (netvsc_attach(ndev, &device_info))
|
|
netdev_err(ndev, "restoring mtu failed\n");
|
|
rollback_vf:
|
|
if (vf_netdev)
|
|
dev_set_mtu(vf_netdev, orig_mtu);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void netvsc_get_vf_stats(struct net_device *net,
|
|
struct netvsc_vf_pcpu_stats *tot)
|
|
{
|
|
struct net_device_context *ndev_ctx = netdev_priv(net);
|
|
int i;
|
|
|
|
memset(tot, 0, sizeof(*tot));
|
|
|
|
for_each_possible_cpu(i) {
|
|
const struct netvsc_vf_pcpu_stats *stats
|
|
= per_cpu_ptr(ndev_ctx->vf_stats, i);
|
|
u64 rx_packets, rx_bytes, tx_packets, tx_bytes;
|
|
unsigned int start;
|
|
|
|
do {
|
|
start = u64_stats_fetch_begin_irq(&stats->syncp);
|
|
rx_packets = stats->rx_packets;
|
|
tx_packets = stats->tx_packets;
|
|
rx_bytes = stats->rx_bytes;
|
|
tx_bytes = stats->tx_bytes;
|
|
} while (u64_stats_fetch_retry_irq(&stats->syncp, start));
|
|
|
|
tot->rx_packets += rx_packets;
|
|
tot->tx_packets += tx_packets;
|
|
tot->rx_bytes += rx_bytes;
|
|
tot->tx_bytes += tx_bytes;
|
|
tot->tx_dropped += stats->tx_dropped;
|
|
}
|
|
}
|
|
|
|
static void netvsc_get_stats64(struct net_device *net,
|
|
struct rtnl_link_stats64 *t)
|
|
{
|
|
struct net_device_context *ndev_ctx = netdev_priv(net);
|
|
struct netvsc_device *nvdev = rcu_dereference_rtnl(ndev_ctx->nvdev);
|
|
struct netvsc_vf_pcpu_stats vf_tot;
|
|
int i;
|
|
|
|
if (!nvdev)
|
|
return;
|
|
|
|
netdev_stats_to_stats64(t, &net->stats);
|
|
|
|
netvsc_get_vf_stats(net, &vf_tot);
|
|
t->rx_packets += vf_tot.rx_packets;
|
|
t->tx_packets += vf_tot.tx_packets;
|
|
t->rx_bytes += vf_tot.rx_bytes;
|
|
t->tx_bytes += vf_tot.tx_bytes;
|
|
t->tx_dropped += vf_tot.tx_dropped;
|
|
|
|
for (i = 0; i < nvdev->num_chn; i++) {
|
|
const struct netvsc_channel *nvchan = &nvdev->chan_table[i];
|
|
const struct netvsc_stats *stats;
|
|
u64 packets, bytes, multicast;
|
|
unsigned int start;
|
|
|
|
stats = &nvchan->tx_stats;
|
|
do {
|
|
start = u64_stats_fetch_begin_irq(&stats->syncp);
|
|
packets = stats->packets;
|
|
bytes = stats->bytes;
|
|
} while (u64_stats_fetch_retry_irq(&stats->syncp, start));
|
|
|
|
t->tx_bytes += bytes;
|
|
t->tx_packets += packets;
|
|
|
|
stats = &nvchan->rx_stats;
|
|
do {
|
|
start = u64_stats_fetch_begin_irq(&stats->syncp);
|
|
packets = stats->packets;
|
|
bytes = stats->bytes;
|
|
multicast = stats->multicast + stats->broadcast;
|
|
} while (u64_stats_fetch_retry_irq(&stats->syncp, start));
|
|
|
|
t->rx_bytes += bytes;
|
|
t->rx_packets += packets;
|
|
t->multicast += multicast;
|
|
}
|
|
}
|
|
|
|
static int netvsc_set_mac_addr(struct net_device *ndev, void *p)
|
|
{
|
|
struct net_device_context *ndc = netdev_priv(ndev);
|
|
struct net_device *vf_netdev = rtnl_dereference(ndc->vf_netdev);
|
|
struct netvsc_device *nvdev = rtnl_dereference(ndc->nvdev);
|
|
struct sockaddr *addr = p;
|
|
int err;
|
|
|
|
err = eth_prepare_mac_addr_change(ndev, p);
|
|
if (err)
|
|
return err;
|
|
|
|
if (!nvdev)
|
|
return -ENODEV;
|
|
|
|
if (vf_netdev) {
|
|
err = dev_set_mac_address(vf_netdev, addr);
|
|
if (err)
|
|
return err;
|
|
}
|
|
|
|
err = rndis_filter_set_device_mac(nvdev, addr->sa_data);
|
|
if (!err) {
|
|
eth_commit_mac_addr_change(ndev, p);
|
|
} else if (vf_netdev) {
|
|
/* rollback change on VF */
|
|
memcpy(addr->sa_data, ndev->dev_addr, ETH_ALEN);
|
|
dev_set_mac_address(vf_netdev, addr);
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
static const struct {
|
|
char name[ETH_GSTRING_LEN];
|
|
u16 offset;
|
|
} netvsc_stats[] = {
|
|
{ "tx_scattered", offsetof(struct netvsc_ethtool_stats, tx_scattered) },
|
|
{ "tx_no_memory", offsetof(struct netvsc_ethtool_stats, tx_no_memory) },
|
|
{ "tx_no_space", offsetof(struct netvsc_ethtool_stats, tx_no_space) },
|
|
{ "tx_too_big", offsetof(struct netvsc_ethtool_stats, tx_too_big) },
|
|
{ "tx_busy", offsetof(struct netvsc_ethtool_stats, tx_busy) },
|
|
{ "tx_send_full", offsetof(struct netvsc_ethtool_stats, tx_send_full) },
|
|
{ "rx_comp_busy", offsetof(struct netvsc_ethtool_stats, rx_comp_busy) },
|
|
{ "rx_no_memory", offsetof(struct netvsc_ethtool_stats, rx_no_memory) },
|
|
{ "stop_queue", offsetof(struct netvsc_ethtool_stats, stop_queue) },
|
|
{ "wake_queue", offsetof(struct netvsc_ethtool_stats, wake_queue) },
|
|
}, vf_stats[] = {
|
|
{ "vf_rx_packets", offsetof(struct netvsc_vf_pcpu_stats, rx_packets) },
|
|
{ "vf_rx_bytes", offsetof(struct netvsc_vf_pcpu_stats, rx_bytes) },
|
|
{ "vf_tx_packets", offsetof(struct netvsc_vf_pcpu_stats, tx_packets) },
|
|
{ "vf_tx_bytes", offsetof(struct netvsc_vf_pcpu_stats, tx_bytes) },
|
|
{ "vf_tx_dropped", offsetof(struct netvsc_vf_pcpu_stats, tx_dropped) },
|
|
};
|
|
|
|
#define NETVSC_GLOBAL_STATS_LEN ARRAY_SIZE(netvsc_stats)
|
|
#define NETVSC_VF_STATS_LEN ARRAY_SIZE(vf_stats)
|
|
|
|
/* 4 statistics per queue (rx/tx packets/bytes) */
|
|
#define NETVSC_QUEUE_STATS_LEN(dev) ((dev)->num_chn * 4)
|
|
|
|
static int netvsc_get_sset_count(struct net_device *dev, int string_set)
|
|
{
|
|
struct net_device_context *ndc = netdev_priv(dev);
|
|
struct netvsc_device *nvdev = rtnl_dereference(ndc->nvdev);
|
|
|
|
if (!nvdev)
|
|
return -ENODEV;
|
|
|
|
switch (string_set) {
|
|
case ETH_SS_STATS:
|
|
return NETVSC_GLOBAL_STATS_LEN
|
|
+ NETVSC_VF_STATS_LEN
|
|
+ NETVSC_QUEUE_STATS_LEN(nvdev);
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
static void netvsc_get_ethtool_stats(struct net_device *dev,
|
|
struct ethtool_stats *stats, u64 *data)
|
|
{
|
|
struct net_device_context *ndc = netdev_priv(dev);
|
|
struct netvsc_device *nvdev = rtnl_dereference(ndc->nvdev);
|
|
const void *nds = &ndc->eth_stats;
|
|
const struct netvsc_stats *qstats;
|
|
struct netvsc_vf_pcpu_stats sum;
|
|
unsigned int start;
|
|
u64 packets, bytes;
|
|
int i, j;
|
|
|
|
if (!nvdev)
|
|
return;
|
|
|
|
for (i = 0; i < NETVSC_GLOBAL_STATS_LEN; i++)
|
|
data[i] = *(unsigned long *)(nds + netvsc_stats[i].offset);
|
|
|
|
netvsc_get_vf_stats(dev, &sum);
|
|
for (j = 0; j < NETVSC_VF_STATS_LEN; j++)
|
|
data[i++] = *(u64 *)((void *)&sum + vf_stats[j].offset);
|
|
|
|
for (j = 0; j < nvdev->num_chn; j++) {
|
|
qstats = &nvdev->chan_table[j].tx_stats;
|
|
|
|
do {
|
|
start = u64_stats_fetch_begin_irq(&qstats->syncp);
|
|
packets = qstats->packets;
|
|
bytes = qstats->bytes;
|
|
} while (u64_stats_fetch_retry_irq(&qstats->syncp, start));
|
|
data[i++] = packets;
|
|
data[i++] = bytes;
|
|
|
|
qstats = &nvdev->chan_table[j].rx_stats;
|
|
do {
|
|
start = u64_stats_fetch_begin_irq(&qstats->syncp);
|
|
packets = qstats->packets;
|
|
bytes = qstats->bytes;
|
|
} while (u64_stats_fetch_retry_irq(&qstats->syncp, start));
|
|
data[i++] = packets;
|
|
data[i++] = bytes;
|
|
}
|
|
}
|
|
|
|
static void netvsc_get_strings(struct net_device *dev, u32 stringset, u8 *data)
|
|
{
|
|
struct net_device_context *ndc = netdev_priv(dev);
|
|
struct netvsc_device *nvdev = rtnl_dereference(ndc->nvdev);
|
|
u8 *p = data;
|
|
int i;
|
|
|
|
if (!nvdev)
|
|
return;
|
|
|
|
switch (stringset) {
|
|
case ETH_SS_STATS:
|
|
for (i = 0; i < ARRAY_SIZE(netvsc_stats); i++) {
|
|
memcpy(p, netvsc_stats[i].name, ETH_GSTRING_LEN);
|
|
p += ETH_GSTRING_LEN;
|
|
}
|
|
|
|
for (i = 0; i < ARRAY_SIZE(vf_stats); i++) {
|
|
memcpy(p, vf_stats[i].name, ETH_GSTRING_LEN);
|
|
p += ETH_GSTRING_LEN;
|
|
}
|
|
|
|
for (i = 0; i < nvdev->num_chn; i++) {
|
|
sprintf(p, "tx_queue_%u_packets", i);
|
|
p += ETH_GSTRING_LEN;
|
|
sprintf(p, "tx_queue_%u_bytes", i);
|
|
p += ETH_GSTRING_LEN;
|
|
sprintf(p, "rx_queue_%u_packets", i);
|
|
p += ETH_GSTRING_LEN;
|
|
sprintf(p, "rx_queue_%u_bytes", i);
|
|
p += ETH_GSTRING_LEN;
|
|
}
|
|
|
|
break;
|
|
}
|
|
}
|
|
|
|
static int
|
|
netvsc_get_rss_hash_opts(struct net_device_context *ndc,
|
|
struct ethtool_rxnfc *info)
|
|
{
|
|
const u32 l4_flag = RXH_L4_B_0_1 | RXH_L4_B_2_3;
|
|
|
|
info->data = RXH_IP_SRC | RXH_IP_DST;
|
|
|
|
switch (info->flow_type) {
|
|
case TCP_V4_FLOW:
|
|
if (ndc->l4_hash & HV_TCP4_L4HASH)
|
|
info->data |= l4_flag;
|
|
|
|
break;
|
|
|
|
case TCP_V6_FLOW:
|
|
if (ndc->l4_hash & HV_TCP6_L4HASH)
|
|
info->data |= l4_flag;
|
|
|
|
break;
|
|
|
|
case UDP_V4_FLOW:
|
|
if (ndc->l4_hash & HV_UDP4_L4HASH)
|
|
info->data |= l4_flag;
|
|
|
|
break;
|
|
|
|
case UDP_V6_FLOW:
|
|
if (ndc->l4_hash & HV_UDP6_L4HASH)
|
|
info->data |= l4_flag;
|
|
|
|
break;
|
|
|
|
case IPV4_FLOW:
|
|
case IPV6_FLOW:
|
|
break;
|
|
default:
|
|
info->data = 0;
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
netvsc_get_rxnfc(struct net_device *dev, struct ethtool_rxnfc *info,
|
|
u32 *rules)
|
|
{
|
|
struct net_device_context *ndc = netdev_priv(dev);
|
|
struct netvsc_device *nvdev = rtnl_dereference(ndc->nvdev);
|
|
|
|
if (!nvdev)
|
|
return -ENODEV;
|
|
|
|
switch (info->cmd) {
|
|
case ETHTOOL_GRXRINGS:
|
|
info->data = nvdev->num_chn;
|
|
return 0;
|
|
|
|
case ETHTOOL_GRXFH:
|
|
return netvsc_get_rss_hash_opts(ndc, info);
|
|
}
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
static int netvsc_set_rss_hash_opts(struct net_device_context *ndc,
|
|
struct ethtool_rxnfc *info)
|
|
{
|
|
if (info->data == (RXH_IP_SRC | RXH_IP_DST |
|
|
RXH_L4_B_0_1 | RXH_L4_B_2_3)) {
|
|
switch (info->flow_type) {
|
|
case TCP_V4_FLOW:
|
|
ndc->l4_hash |= HV_TCP4_L4HASH;
|
|
break;
|
|
|
|
case TCP_V6_FLOW:
|
|
ndc->l4_hash |= HV_TCP6_L4HASH;
|
|
break;
|
|
|
|
case UDP_V4_FLOW:
|
|
ndc->l4_hash |= HV_UDP4_L4HASH;
|
|
break;
|
|
|
|
case UDP_V6_FLOW:
|
|
ndc->l4_hash |= HV_UDP6_L4HASH;
|
|
break;
|
|
|
|
default:
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
if (info->data == (RXH_IP_SRC | RXH_IP_DST)) {
|
|
switch (info->flow_type) {
|
|
case TCP_V4_FLOW:
|
|
ndc->l4_hash &= ~HV_TCP4_L4HASH;
|
|
break;
|
|
|
|
case TCP_V6_FLOW:
|
|
ndc->l4_hash &= ~HV_TCP6_L4HASH;
|
|
break;
|
|
|
|
case UDP_V4_FLOW:
|
|
ndc->l4_hash &= ~HV_UDP4_L4HASH;
|
|
break;
|
|
|
|
case UDP_V6_FLOW:
|
|
ndc->l4_hash &= ~HV_UDP6_L4HASH;
|
|
break;
|
|
|
|
default:
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
static int
|
|
netvsc_set_rxnfc(struct net_device *ndev, struct ethtool_rxnfc *info)
|
|
{
|
|
struct net_device_context *ndc = netdev_priv(ndev);
|
|
|
|
if (info->cmd == ETHTOOL_SRXFH)
|
|
return netvsc_set_rss_hash_opts(ndc, info);
|
|
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
#ifdef CONFIG_NET_POLL_CONTROLLER
|
|
static void netvsc_poll_controller(struct net_device *dev)
|
|
{
|
|
struct net_device_context *ndc = netdev_priv(dev);
|
|
struct netvsc_device *ndev;
|
|
int i;
|
|
|
|
rcu_read_lock();
|
|
ndev = rcu_dereference(ndc->nvdev);
|
|
if (ndev) {
|
|
for (i = 0; i < ndev->num_chn; i++) {
|
|
struct netvsc_channel *nvchan = &ndev->chan_table[i];
|
|
|
|
napi_schedule(&nvchan->napi);
|
|
}
|
|
}
|
|
rcu_read_unlock();
|
|
}
|
|
#endif
|
|
|
|
static u32 netvsc_get_rxfh_key_size(struct net_device *dev)
|
|
{
|
|
return NETVSC_HASH_KEYLEN;
|
|
}
|
|
|
|
static u32 netvsc_rss_indir_size(struct net_device *dev)
|
|
{
|
|
return ITAB_NUM;
|
|
}
|
|
|
|
static int netvsc_get_rxfh(struct net_device *dev, u32 *indir, u8 *key,
|
|
u8 *hfunc)
|
|
{
|
|
struct net_device_context *ndc = netdev_priv(dev);
|
|
struct netvsc_device *ndev = rtnl_dereference(ndc->nvdev);
|
|
struct rndis_device *rndis_dev;
|
|
int i;
|
|
|
|
if (!ndev)
|
|
return -ENODEV;
|
|
|
|
if (hfunc)
|
|
*hfunc = ETH_RSS_HASH_TOP; /* Toeplitz */
|
|
|
|
rndis_dev = ndev->extension;
|
|
if (indir) {
|
|
for (i = 0; i < ITAB_NUM; i++)
|
|
indir[i] = rndis_dev->rx_table[i];
|
|
}
|
|
|
|
if (key)
|
|
memcpy(key, rndis_dev->rss_key, NETVSC_HASH_KEYLEN);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int netvsc_set_rxfh(struct net_device *dev, const u32 *indir,
|
|
const u8 *key, const u8 hfunc)
|
|
{
|
|
struct net_device_context *ndc = netdev_priv(dev);
|
|
struct netvsc_device *ndev = rtnl_dereference(ndc->nvdev);
|
|
struct rndis_device *rndis_dev;
|
|
int i;
|
|
|
|
if (!ndev)
|
|
return -ENODEV;
|
|
|
|
if (hfunc != ETH_RSS_HASH_NO_CHANGE && hfunc != ETH_RSS_HASH_TOP)
|
|
return -EOPNOTSUPP;
|
|
|
|
rndis_dev = ndev->extension;
|
|
if (indir) {
|
|
for (i = 0; i < ITAB_NUM; i++)
|
|
if (indir[i] >= ndev->num_chn)
|
|
return -EINVAL;
|
|
|
|
for (i = 0; i < ITAB_NUM; i++)
|
|
rndis_dev->rx_table[i] = indir[i];
|
|
}
|
|
|
|
if (!key) {
|
|
if (!indir)
|
|
return 0;
|
|
|
|
key = rndis_dev->rss_key;
|
|
}
|
|
|
|
return rndis_filter_set_rss_param(rndis_dev, key);
|
|
}
|
|
|
|
/* Hyper-V RNDIS protocol does not have ring in the HW sense.
|
|
* It does have pre-allocated receive area which is divided into sections.
|
|
*/
|
|
static void __netvsc_get_ringparam(struct netvsc_device *nvdev,
|
|
struct ethtool_ringparam *ring)
|
|
{
|
|
u32 max_buf_size;
|
|
|
|
ring->rx_pending = nvdev->recv_section_cnt;
|
|
ring->tx_pending = nvdev->send_section_cnt;
|
|
|
|
if (nvdev->nvsp_version <= NVSP_PROTOCOL_VERSION_2)
|
|
max_buf_size = NETVSC_RECEIVE_BUFFER_SIZE_LEGACY;
|
|
else
|
|
max_buf_size = NETVSC_RECEIVE_BUFFER_SIZE;
|
|
|
|
ring->rx_max_pending = max_buf_size / nvdev->recv_section_size;
|
|
ring->tx_max_pending = NETVSC_SEND_BUFFER_SIZE
|
|
/ nvdev->send_section_size;
|
|
}
|
|
|
|
static void netvsc_get_ringparam(struct net_device *ndev,
|
|
struct ethtool_ringparam *ring)
|
|
{
|
|
struct net_device_context *ndevctx = netdev_priv(ndev);
|
|
struct netvsc_device *nvdev = rtnl_dereference(ndevctx->nvdev);
|
|
|
|
if (!nvdev)
|
|
return;
|
|
|
|
__netvsc_get_ringparam(nvdev, ring);
|
|
}
|
|
|
|
static int netvsc_set_ringparam(struct net_device *ndev,
|
|
struct ethtool_ringparam *ring)
|
|
{
|
|
struct net_device_context *ndevctx = netdev_priv(ndev);
|
|
struct netvsc_device *nvdev = rtnl_dereference(ndevctx->nvdev);
|
|
struct netvsc_device_info device_info;
|
|
struct ethtool_ringparam orig;
|
|
u32 new_tx, new_rx;
|
|
int ret = 0;
|
|
|
|
if (!nvdev || nvdev->destroy)
|
|
return -ENODEV;
|
|
|
|
memset(&orig, 0, sizeof(orig));
|
|
__netvsc_get_ringparam(nvdev, &orig);
|
|
|
|
new_tx = clamp_t(u32, ring->tx_pending,
|
|
NETVSC_MIN_TX_SECTIONS, orig.tx_max_pending);
|
|
new_rx = clamp_t(u32, ring->rx_pending,
|
|
NETVSC_MIN_RX_SECTIONS, orig.rx_max_pending);
|
|
|
|
if (new_tx == orig.tx_pending &&
|
|
new_rx == orig.rx_pending)
|
|
return 0; /* no change */
|
|
|
|
memset(&device_info, 0, sizeof(device_info));
|
|
device_info.num_chn = nvdev->num_chn;
|
|
device_info.send_sections = new_tx;
|
|
device_info.send_section_size = nvdev->send_section_size;
|
|
device_info.recv_sections = new_rx;
|
|
device_info.recv_section_size = nvdev->recv_section_size;
|
|
|
|
ret = netvsc_detach(ndev, nvdev);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = netvsc_attach(ndev, &device_info);
|
|
if (ret) {
|
|
device_info.send_sections = orig.tx_pending;
|
|
device_info.recv_sections = orig.rx_pending;
|
|
|
|
if (netvsc_attach(ndev, &device_info))
|
|
netdev_err(ndev, "restoring ringparam failed");
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static const struct ethtool_ops ethtool_ops = {
|
|
.get_drvinfo = netvsc_get_drvinfo,
|
|
.get_link = ethtool_op_get_link,
|
|
.get_ethtool_stats = netvsc_get_ethtool_stats,
|
|
.get_sset_count = netvsc_get_sset_count,
|
|
.get_strings = netvsc_get_strings,
|
|
.get_channels = netvsc_get_channels,
|
|
.set_channels = netvsc_set_channels,
|
|
.get_ts_info = ethtool_op_get_ts_info,
|
|
.get_rxnfc = netvsc_get_rxnfc,
|
|
.set_rxnfc = netvsc_set_rxnfc,
|
|
.get_rxfh_key_size = netvsc_get_rxfh_key_size,
|
|
.get_rxfh_indir_size = netvsc_rss_indir_size,
|
|
.get_rxfh = netvsc_get_rxfh,
|
|
.set_rxfh = netvsc_set_rxfh,
|
|
.get_link_ksettings = netvsc_get_link_ksettings,
|
|
.set_link_ksettings = netvsc_set_link_ksettings,
|
|
.get_ringparam = netvsc_get_ringparam,
|
|
.set_ringparam = netvsc_set_ringparam,
|
|
};
|
|
|
|
static const struct net_device_ops device_ops = {
|
|
.ndo_open = netvsc_open,
|
|
.ndo_stop = netvsc_close,
|
|
.ndo_start_xmit = netvsc_start_xmit,
|
|
.ndo_change_rx_flags = netvsc_change_rx_flags,
|
|
.ndo_set_rx_mode = netvsc_set_rx_mode,
|
|
.ndo_change_mtu = netvsc_change_mtu,
|
|
.ndo_validate_addr = eth_validate_addr,
|
|
.ndo_set_mac_address = netvsc_set_mac_addr,
|
|
.ndo_select_queue = netvsc_select_queue,
|
|
.ndo_get_stats64 = netvsc_get_stats64,
|
|
#ifdef CONFIG_NET_POLL_CONTROLLER
|
|
.ndo_poll_controller = netvsc_poll_controller,
|
|
#endif
|
|
};
|
|
|
|
/*
|
|
* Handle link status changes. For RNDIS_STATUS_NETWORK_CHANGE emulate link
|
|
* down/up sequence. In case of RNDIS_STATUS_MEDIA_CONNECT when carrier is
|
|
* present send GARP packet to network peers with netif_notify_peers().
|
|
*/
|
|
static void netvsc_link_change(struct work_struct *w)
|
|
{
|
|
struct net_device_context *ndev_ctx =
|
|
container_of(w, struct net_device_context, dwork.work);
|
|
struct hv_device *device_obj = ndev_ctx->device_ctx;
|
|
struct net_device *net = hv_get_drvdata(device_obj);
|
|
struct netvsc_device *net_device;
|
|
struct rndis_device *rdev;
|
|
struct netvsc_reconfig *event = NULL;
|
|
bool notify = false, reschedule = false;
|
|
unsigned long flags, next_reconfig, delay;
|
|
|
|
/* if changes are happening, comeback later */
|
|
if (!rtnl_trylock()) {
|
|
schedule_delayed_work(&ndev_ctx->dwork, LINKCHANGE_INT);
|
|
return;
|
|
}
|
|
|
|
net_device = rtnl_dereference(ndev_ctx->nvdev);
|
|
if (!net_device)
|
|
goto out_unlock;
|
|
|
|
rdev = net_device->extension;
|
|
|
|
next_reconfig = ndev_ctx->last_reconfig + LINKCHANGE_INT;
|
|
if (time_is_after_jiffies(next_reconfig)) {
|
|
/* link_watch only sends one notification with current state
|
|
* per second, avoid doing reconfig more frequently. Handle
|
|
* wrap around.
|
|
*/
|
|
delay = next_reconfig - jiffies;
|
|
delay = delay < LINKCHANGE_INT ? delay : LINKCHANGE_INT;
|
|
schedule_delayed_work(&ndev_ctx->dwork, delay);
|
|
goto out_unlock;
|
|
}
|
|
ndev_ctx->last_reconfig = jiffies;
|
|
|
|
spin_lock_irqsave(&ndev_ctx->lock, flags);
|
|
if (!list_empty(&ndev_ctx->reconfig_events)) {
|
|
event = list_first_entry(&ndev_ctx->reconfig_events,
|
|
struct netvsc_reconfig, list);
|
|
list_del(&event->list);
|
|
reschedule = !list_empty(&ndev_ctx->reconfig_events);
|
|
}
|
|
spin_unlock_irqrestore(&ndev_ctx->lock, flags);
|
|
|
|
if (!event)
|
|
goto out_unlock;
|
|
|
|
switch (event->event) {
|
|
/* Only the following events are possible due to the check in
|
|
* netvsc_linkstatus_callback()
|
|
*/
|
|
case RNDIS_STATUS_MEDIA_CONNECT:
|
|
if (rdev->link_state) {
|
|
rdev->link_state = false;
|
|
netif_carrier_on(net);
|
|
netif_tx_wake_all_queues(net);
|
|
} else {
|
|
notify = true;
|
|
}
|
|
kfree(event);
|
|
break;
|
|
case RNDIS_STATUS_MEDIA_DISCONNECT:
|
|
if (!rdev->link_state) {
|
|
rdev->link_state = true;
|
|
netif_carrier_off(net);
|
|
netif_tx_stop_all_queues(net);
|
|
}
|
|
kfree(event);
|
|
break;
|
|
case RNDIS_STATUS_NETWORK_CHANGE:
|
|
/* Only makes sense if carrier is present */
|
|
if (!rdev->link_state) {
|
|
rdev->link_state = true;
|
|
netif_carrier_off(net);
|
|
netif_tx_stop_all_queues(net);
|
|
event->event = RNDIS_STATUS_MEDIA_CONNECT;
|
|
spin_lock_irqsave(&ndev_ctx->lock, flags);
|
|
list_add(&event->list, &ndev_ctx->reconfig_events);
|
|
spin_unlock_irqrestore(&ndev_ctx->lock, flags);
|
|
reschedule = true;
|
|
}
|
|
break;
|
|
}
|
|
|
|
rtnl_unlock();
|
|
|
|
if (notify)
|
|
netdev_notify_peers(net);
|
|
|
|
/* link_watch only sends one notification with current state per
|
|
* second, handle next reconfig event in 2 seconds.
|
|
*/
|
|
if (reschedule)
|
|
schedule_delayed_work(&ndev_ctx->dwork, LINKCHANGE_INT);
|
|
|
|
return;
|
|
|
|
out_unlock:
|
|
rtnl_unlock();
|
|
}
|
|
|
|
static struct net_device *get_netvsc_bymac(const u8 *mac)
|
|
{
|
|
struct net_device *dev;
|
|
|
|
ASSERT_RTNL();
|
|
|
|
for_each_netdev(&init_net, dev) {
|
|
if (dev->netdev_ops != &device_ops)
|
|
continue; /* not a netvsc device */
|
|
|
|
if (ether_addr_equal(mac, dev->perm_addr))
|
|
return dev;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static struct net_device *get_netvsc_byref(struct net_device *vf_netdev)
|
|
{
|
|
struct net_device *dev;
|
|
|
|
ASSERT_RTNL();
|
|
|
|
for_each_netdev(&init_net, dev) {
|
|
struct net_device_context *net_device_ctx;
|
|
|
|
if (dev->netdev_ops != &device_ops)
|
|
continue; /* not a netvsc device */
|
|
|
|
net_device_ctx = netdev_priv(dev);
|
|
if (!rtnl_dereference(net_device_ctx->nvdev))
|
|
continue; /* device is removed */
|
|
|
|
if (rtnl_dereference(net_device_ctx->vf_netdev) == vf_netdev)
|
|
return dev; /* a match */
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/* Called when VF is injecting data into network stack.
|
|
* Change the associated network device from VF to netvsc.
|
|
* note: already called with rcu_read_lock
|
|
*/
|
|
static rx_handler_result_t netvsc_vf_handle_frame(struct sk_buff **pskb)
|
|
{
|
|
struct sk_buff *skb = *pskb;
|
|
struct net_device *ndev = rcu_dereference(skb->dev->rx_handler_data);
|
|
struct net_device_context *ndev_ctx = netdev_priv(ndev);
|
|
struct netvsc_vf_pcpu_stats *pcpu_stats
|
|
= this_cpu_ptr(ndev_ctx->vf_stats);
|
|
|
|
skb->dev = ndev;
|
|
|
|
u64_stats_update_begin(&pcpu_stats->syncp);
|
|
pcpu_stats->rx_packets++;
|
|
pcpu_stats->rx_bytes += skb->len;
|
|
u64_stats_update_end(&pcpu_stats->syncp);
|
|
|
|
return RX_HANDLER_ANOTHER;
|
|
}
|
|
|
|
static int netvsc_vf_join(struct net_device *vf_netdev,
|
|
struct net_device *ndev)
|
|
{
|
|
struct net_device_context *ndev_ctx = netdev_priv(ndev);
|
|
int ret;
|
|
|
|
ret = netdev_rx_handler_register(vf_netdev,
|
|
netvsc_vf_handle_frame, ndev);
|
|
if (ret != 0) {
|
|
netdev_err(vf_netdev,
|
|
"can not register netvsc VF receive handler (err = %d)\n",
|
|
ret);
|
|
goto rx_handler_failed;
|
|
}
|
|
|
|
ret = netdev_master_upper_dev_link(vf_netdev, ndev,
|
|
NULL, NULL, NULL);
|
|
if (ret != 0) {
|
|
netdev_err(vf_netdev,
|
|
"can not set master device %s (err = %d)\n",
|
|
ndev->name, ret);
|
|
goto upper_link_failed;
|
|
}
|
|
|
|
/* set slave flag before open to prevent IPv6 addrconf */
|
|
vf_netdev->flags |= IFF_SLAVE;
|
|
|
|
schedule_delayed_work(&ndev_ctx->vf_takeover, VF_TAKEOVER_INT);
|
|
|
|
call_netdevice_notifiers(NETDEV_JOIN, vf_netdev);
|
|
|
|
netdev_info(vf_netdev, "joined to %s\n", ndev->name);
|
|
return 0;
|
|
|
|
upper_link_failed:
|
|
netdev_rx_handler_unregister(vf_netdev);
|
|
rx_handler_failed:
|
|
return ret;
|
|
}
|
|
|
|
static void __netvsc_vf_setup(struct net_device *ndev,
|
|
struct net_device *vf_netdev)
|
|
{
|
|
int ret;
|
|
|
|
/* Align MTU of VF with master */
|
|
ret = dev_set_mtu(vf_netdev, ndev->mtu);
|
|
if (ret)
|
|
netdev_warn(vf_netdev,
|
|
"unable to change mtu to %u\n", ndev->mtu);
|
|
|
|
/* set multicast etc flags on VF */
|
|
dev_change_flags(vf_netdev, ndev->flags | IFF_SLAVE);
|
|
|
|
/* sync address list from ndev to VF */
|
|
netif_addr_lock_bh(ndev);
|
|
dev_uc_sync(vf_netdev, ndev);
|
|
dev_mc_sync(vf_netdev, ndev);
|
|
netif_addr_unlock_bh(ndev);
|
|
|
|
if (netif_running(ndev)) {
|
|
ret = dev_open(vf_netdev);
|
|
if (ret)
|
|
netdev_warn(vf_netdev,
|
|
"unable to open: %d\n", ret);
|
|
}
|
|
}
|
|
|
|
/* Setup VF as slave of the synthetic device.
|
|
* Runs in workqueue to avoid recursion in netlink callbacks.
|
|
*/
|
|
static void netvsc_vf_setup(struct work_struct *w)
|
|
{
|
|
struct net_device_context *ndev_ctx
|
|
= container_of(w, struct net_device_context, vf_takeover.work);
|
|
struct net_device *ndev = hv_get_drvdata(ndev_ctx->device_ctx);
|
|
struct net_device *vf_netdev;
|
|
|
|
if (!rtnl_trylock()) {
|
|
schedule_delayed_work(&ndev_ctx->vf_takeover, 0);
|
|
return;
|
|
}
|
|
|
|
vf_netdev = rtnl_dereference(ndev_ctx->vf_netdev);
|
|
if (vf_netdev)
|
|
__netvsc_vf_setup(ndev, vf_netdev);
|
|
|
|
rtnl_unlock();
|
|
}
|
|
|
|
static int netvsc_register_vf(struct net_device *vf_netdev)
|
|
{
|
|
struct net_device *ndev;
|
|
struct net_device_context *net_device_ctx;
|
|
struct netvsc_device *netvsc_dev;
|
|
|
|
if (vf_netdev->addr_len != ETH_ALEN)
|
|
return NOTIFY_DONE;
|
|
|
|
/*
|
|
* We will use the MAC address to locate the synthetic interface to
|
|
* associate with the VF interface. If we don't find a matching
|
|
* synthetic interface, move on.
|
|
*/
|
|
ndev = get_netvsc_bymac(vf_netdev->perm_addr);
|
|
if (!ndev)
|
|
return NOTIFY_DONE;
|
|
|
|
net_device_ctx = netdev_priv(ndev);
|
|
netvsc_dev = rtnl_dereference(net_device_ctx->nvdev);
|
|
if (!netvsc_dev || rtnl_dereference(net_device_ctx->vf_netdev))
|
|
return NOTIFY_DONE;
|
|
|
|
if (netvsc_vf_join(vf_netdev, ndev) != 0)
|
|
return NOTIFY_DONE;
|
|
|
|
netdev_info(ndev, "VF registering: %s\n", vf_netdev->name);
|
|
|
|
dev_hold(vf_netdev);
|
|
rcu_assign_pointer(net_device_ctx->vf_netdev, vf_netdev);
|
|
return NOTIFY_OK;
|
|
}
|
|
|
|
/* VF up/down change detected, schedule to change data path */
|
|
static int netvsc_vf_changed(struct net_device *vf_netdev)
|
|
{
|
|
struct net_device_context *net_device_ctx;
|
|
struct netvsc_device *netvsc_dev;
|
|
struct net_device *ndev;
|
|
bool vf_is_up = netif_running(vf_netdev);
|
|
|
|
ndev = get_netvsc_byref(vf_netdev);
|
|
if (!ndev)
|
|
return NOTIFY_DONE;
|
|
|
|
net_device_ctx = netdev_priv(ndev);
|
|
netvsc_dev = rtnl_dereference(net_device_ctx->nvdev);
|
|
if (!netvsc_dev)
|
|
return NOTIFY_DONE;
|
|
|
|
netvsc_switch_datapath(ndev, vf_is_up);
|
|
netdev_info(ndev, "Data path switched %s VF: %s\n",
|
|
vf_is_up ? "to" : "from", vf_netdev->name);
|
|
|
|
return NOTIFY_OK;
|
|
}
|
|
|
|
static int netvsc_unregister_vf(struct net_device *vf_netdev)
|
|
{
|
|
struct net_device *ndev;
|
|
struct net_device_context *net_device_ctx;
|
|
|
|
ndev = get_netvsc_byref(vf_netdev);
|
|
if (!ndev)
|
|
return NOTIFY_DONE;
|
|
|
|
net_device_ctx = netdev_priv(ndev);
|
|
cancel_delayed_work_sync(&net_device_ctx->vf_takeover);
|
|
|
|
netdev_info(ndev, "VF unregistering: %s\n", vf_netdev->name);
|
|
|
|
netdev_rx_handler_unregister(vf_netdev);
|
|
netdev_upper_dev_unlink(vf_netdev, ndev);
|
|
RCU_INIT_POINTER(net_device_ctx->vf_netdev, NULL);
|
|
dev_put(vf_netdev);
|
|
|
|
return NOTIFY_OK;
|
|
}
|
|
|
|
static int netvsc_probe(struct hv_device *dev,
|
|
const struct hv_vmbus_device_id *dev_id)
|
|
{
|
|
struct net_device *net = NULL;
|
|
struct net_device_context *net_device_ctx;
|
|
struct netvsc_device_info device_info;
|
|
struct netvsc_device *nvdev;
|
|
int ret = -ENOMEM;
|
|
|
|
net = alloc_etherdev_mq(sizeof(struct net_device_context),
|
|
VRSS_CHANNEL_MAX);
|
|
if (!net)
|
|
goto no_net;
|
|
|
|
netif_carrier_off(net);
|
|
|
|
netvsc_init_settings(net);
|
|
|
|
net_device_ctx = netdev_priv(net);
|
|
net_device_ctx->device_ctx = dev;
|
|
net_device_ctx->msg_enable = netif_msg_init(debug, default_msg);
|
|
if (netif_msg_probe(net_device_ctx))
|
|
netdev_dbg(net, "netvsc msg_enable: %d\n",
|
|
net_device_ctx->msg_enable);
|
|
|
|
hv_set_drvdata(dev, net);
|
|
|
|
INIT_DELAYED_WORK(&net_device_ctx->dwork, netvsc_link_change);
|
|
|
|
spin_lock_init(&net_device_ctx->lock);
|
|
INIT_LIST_HEAD(&net_device_ctx->reconfig_events);
|
|
INIT_DELAYED_WORK(&net_device_ctx->vf_takeover, netvsc_vf_setup);
|
|
|
|
net_device_ctx->vf_stats
|
|
= netdev_alloc_pcpu_stats(struct netvsc_vf_pcpu_stats);
|
|
if (!net_device_ctx->vf_stats)
|
|
goto no_stats;
|
|
|
|
net->netdev_ops = &device_ops;
|
|
net->ethtool_ops = ðtool_ops;
|
|
SET_NETDEV_DEV(net, &dev->device);
|
|
|
|
/* We always need headroom for rndis header */
|
|
net->needed_headroom = RNDIS_AND_PPI_SIZE;
|
|
|
|
/* Initialize the number of queues to be 1, we may change it if more
|
|
* channels are offered later.
|
|
*/
|
|
netif_set_real_num_tx_queues(net, 1);
|
|
netif_set_real_num_rx_queues(net, 1);
|
|
|
|
/* Notify the netvsc driver of the new device */
|
|
memset(&device_info, 0, sizeof(device_info));
|
|
device_info.num_chn = VRSS_CHANNEL_DEFAULT;
|
|
device_info.send_sections = NETVSC_DEFAULT_TX;
|
|
device_info.send_section_size = NETVSC_SEND_SECTION_SIZE;
|
|
device_info.recv_sections = NETVSC_DEFAULT_RX;
|
|
device_info.recv_section_size = NETVSC_RECV_SECTION_SIZE;
|
|
|
|
nvdev = rndis_filter_device_add(dev, &device_info);
|
|
if (IS_ERR(nvdev)) {
|
|
ret = PTR_ERR(nvdev);
|
|
netdev_err(net, "unable to add netvsc device (ret %d)\n", ret);
|
|
goto rndis_failed;
|
|
}
|
|
|
|
memcpy(net->dev_addr, device_info.mac_adr, ETH_ALEN);
|
|
|
|
/* hw_features computed in rndis_netdev_set_hwcaps() */
|
|
net->features = net->hw_features |
|
|
NETIF_F_HIGHDMA | NETIF_F_SG |
|
|
NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX;
|
|
net->vlan_features = net->features;
|
|
|
|
netdev_lockdep_set_classes(net);
|
|
|
|
/* MTU range: 68 - 1500 or 65521 */
|
|
net->min_mtu = NETVSC_MTU_MIN;
|
|
if (nvdev->nvsp_version >= NVSP_PROTOCOL_VERSION_2)
|
|
net->max_mtu = NETVSC_MTU - ETH_HLEN;
|
|
else
|
|
net->max_mtu = ETH_DATA_LEN;
|
|
|
|
ret = register_netdev(net);
|
|
if (ret != 0) {
|
|
pr_err("Unable to register netdev.\n");
|
|
goto register_failed;
|
|
}
|
|
|
|
return ret;
|
|
|
|
register_failed:
|
|
rndis_filter_device_remove(dev, nvdev);
|
|
rndis_failed:
|
|
free_percpu(net_device_ctx->vf_stats);
|
|
no_stats:
|
|
hv_set_drvdata(dev, NULL);
|
|
free_netdev(net);
|
|
no_net:
|
|
return ret;
|
|
}
|
|
|
|
static int netvsc_remove(struct hv_device *dev)
|
|
{
|
|
struct net_device_context *ndev_ctx;
|
|
struct net_device *vf_netdev, *net;
|
|
struct netvsc_device *nvdev;
|
|
|
|
net = hv_get_drvdata(dev);
|
|
if (net == NULL) {
|
|
dev_err(&dev->device, "No net device to remove\n");
|
|
return 0;
|
|
}
|
|
|
|
ndev_ctx = netdev_priv(net);
|
|
|
|
cancel_delayed_work_sync(&ndev_ctx->dwork);
|
|
|
|
rcu_read_lock();
|
|
nvdev = rcu_dereference(ndev_ctx->nvdev);
|
|
|
|
if (nvdev)
|
|
cancel_work_sync(&nvdev->subchan_work);
|
|
|
|
/*
|
|
* Call to the vsc driver to let it know that the device is being
|
|
* removed. Also blocks mtu and channel changes.
|
|
*/
|
|
rtnl_lock();
|
|
vf_netdev = rtnl_dereference(ndev_ctx->vf_netdev);
|
|
if (vf_netdev)
|
|
netvsc_unregister_vf(vf_netdev);
|
|
|
|
if (nvdev)
|
|
rndis_filter_device_remove(dev, nvdev);
|
|
|
|
unregister_netdevice(net);
|
|
|
|
rtnl_unlock();
|
|
rcu_read_unlock();
|
|
|
|
hv_set_drvdata(dev, NULL);
|
|
|
|
free_percpu(ndev_ctx->vf_stats);
|
|
free_netdev(net);
|
|
return 0;
|
|
}
|
|
|
|
static const struct hv_vmbus_device_id id_table[] = {
|
|
/* Network guid */
|
|
{ HV_NIC_GUID, },
|
|
{ },
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(vmbus, id_table);
|
|
|
|
/* The one and only one */
|
|
static struct hv_driver netvsc_drv = {
|
|
.name = KBUILD_MODNAME,
|
|
.id_table = id_table,
|
|
.probe = netvsc_probe,
|
|
.remove = netvsc_remove,
|
|
};
|
|
|
|
/*
|
|
* On Hyper-V, every VF interface is matched with a corresponding
|
|
* synthetic interface. The synthetic interface is presented first
|
|
* to the guest. When the corresponding VF instance is registered,
|
|
* we will take care of switching the data path.
|
|
*/
|
|
static int netvsc_netdev_event(struct notifier_block *this,
|
|
unsigned long event, void *ptr)
|
|
{
|
|
struct net_device *event_dev = netdev_notifier_info_to_dev(ptr);
|
|
|
|
/* Skip our own events */
|
|
if (event_dev->netdev_ops == &device_ops)
|
|
return NOTIFY_DONE;
|
|
|
|
/* Avoid non-Ethernet type devices */
|
|
if (event_dev->type != ARPHRD_ETHER)
|
|
return NOTIFY_DONE;
|
|
|
|
/* Avoid Vlan dev with same MAC registering as VF */
|
|
if (is_vlan_dev(event_dev))
|
|
return NOTIFY_DONE;
|
|
|
|
/* Avoid Bonding master dev with same MAC registering as VF */
|
|
if ((event_dev->priv_flags & IFF_BONDING) &&
|
|
(event_dev->flags & IFF_MASTER))
|
|
return NOTIFY_DONE;
|
|
|
|
switch (event) {
|
|
case NETDEV_REGISTER:
|
|
return netvsc_register_vf(event_dev);
|
|
case NETDEV_UNREGISTER:
|
|
return netvsc_unregister_vf(event_dev);
|
|
case NETDEV_UP:
|
|
case NETDEV_DOWN:
|
|
return netvsc_vf_changed(event_dev);
|
|
default:
|
|
return NOTIFY_DONE;
|
|
}
|
|
}
|
|
|
|
static struct notifier_block netvsc_netdev_notifier = {
|
|
.notifier_call = netvsc_netdev_event,
|
|
};
|
|
|
|
static void __exit netvsc_drv_exit(void)
|
|
{
|
|
unregister_netdevice_notifier(&netvsc_netdev_notifier);
|
|
vmbus_driver_unregister(&netvsc_drv);
|
|
}
|
|
|
|
static int __init netvsc_drv_init(void)
|
|
{
|
|
int ret;
|
|
|
|
if (ring_size < RING_SIZE_MIN) {
|
|
ring_size = RING_SIZE_MIN;
|
|
pr_info("Increased ring_size to %u (min allowed)\n",
|
|
ring_size);
|
|
}
|
|
netvsc_ring_bytes = ring_size * PAGE_SIZE;
|
|
netvsc_ring_reciprocal = reciprocal_value(netvsc_ring_bytes);
|
|
|
|
ret = vmbus_driver_register(&netvsc_drv);
|
|
if (ret)
|
|
return ret;
|
|
|
|
register_netdevice_notifier(&netvsc_netdev_notifier);
|
|
return 0;
|
|
}
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_DESCRIPTION("Microsoft Hyper-V network driver");
|
|
|
|
module_init(netvsc_drv_init);
|
|
module_exit(netvsc_drv_exit);
|