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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123// SPDX-License-Identifier: GPL-2.0-only#include <linux/ethtool.h>#include <linux/module.h>#include <linux/kernel.h>#include <linux/if_arp.h>#include <net/rtnetlink.h>#include <net/sock.h>#include <net/af_vsock.h>#include <uapi/linux/vsockmon.h>#include <linux/virtio_vsock.h>
/* Virtio transport max packet size plus header */#define DEFAULT_MTU (VIRTIO_VSOCK_MAX_PKT_BUF_SIZE + \ sizeof(struct af_vsockmon_hdr))
struct vsockmon { struct vsock_tap vt;};
static int vsockmon_open(struct net_device *dev){ struct vsockmon *vsockmon = netdev_priv(dev);
vsockmon->vt.dev = dev; vsockmon->vt.module = THIS_MODULE; return vsock_add_tap(&vsockmon->vt);}
static int vsockmon_close(struct net_device *dev){ struct vsockmon *vsockmon = netdev_priv(dev);
return vsock_remove_tap(&vsockmon->vt);}
static netdev_tx_t vsockmon_xmit(struct sk_buff *skb, struct net_device *dev){ dev_lstats_add(dev, skb->len);
dev_kfree_skb(skb);
return NETDEV_TX_OK;}
static voidvsockmon_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats){ dev_lstats_read(dev, &stats->rx_packets, &stats->rx_bytes);}
static int vsockmon_is_valid_mtu(int new_mtu){ return new_mtu >= (int)sizeof(struct af_vsockmon_hdr);}
static int vsockmon_change_mtu(struct net_device *dev, int new_mtu){ if (!vsockmon_is_valid_mtu(new_mtu)) return -EINVAL;
WRITE_ONCE(dev->mtu, new_mtu); return 0;}
static const struct net_device_ops vsockmon_ops = { .ndo_open = vsockmon_open, .ndo_stop = vsockmon_close, .ndo_start_xmit = vsockmon_xmit, .ndo_get_stats64 = vsockmon_get_stats64, .ndo_change_mtu = vsockmon_change_mtu,};
static u32 always_on(struct net_device *dev){ return 1;}
static const struct ethtool_ops vsockmon_ethtool_ops = { .get_link = always_on,};
static void vsockmon_setup(struct net_device *dev){ dev->type = ARPHRD_VSOCKMON; dev->priv_flags |= IFF_NO_QUEUE; dev->lltx = true;
dev->netdev_ops = &vsockmon_ops; dev->ethtool_ops = &vsockmon_ethtool_ops; dev->needs_free_netdev = true;
dev->features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_HIGHDMA;
dev->flags = IFF_NOARP;
dev->mtu = DEFAULT_MTU; dev->pcpu_stat_type = NETDEV_PCPU_STAT_LSTATS;}
static struct rtnl_link_ops vsockmon_link_ops __read_mostly = { .kind = "vsockmon", .priv_size = sizeof(struct vsockmon), .setup = vsockmon_setup,};
static __init int vsockmon_register(void){ return rtnl_link_register(&vsockmon_link_ops);}
static __exit void vsockmon_unregister(void){ rtnl_link_unregister(&vsockmon_link_ops);}
module_init(vsockmon_register);module_exit(vsockmon_unregister);
MODULE_LICENSE("GPL v2");MODULE_AUTHOR("Gerard Garcia <ggarcia@deic.uab.cat>");MODULE_DESCRIPTION("Vsock monitoring device. Based on nlmon device.");MODULE_ALIAS_RTNL_LINK("vsockmon");