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net: add generic selftest support
Port some parts of the stmmac selftest and reuse it as basic generic selftest library. This patch was tested with following combinations: - iMX6DL FEC -> AT8035 - iMX6DL FEC -> SJA1105Q switch -> KSZ8081 - iMX6DL FEC -> SJA1105Q switch -> KSZ9031 - AR9331 ag71xx -> AR9331 PHY - AR9331 ag71xx -> AR9331 switch -> AR9331 PHY Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Oleksij Rempel
David S. Miller
parent
014068dcb5
commit
3e1e58d64c
12
include/net/selftests.h
Normal file
12
include/net/selftests.h
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@ -0,0 +1,12 @@
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/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _NET_SELFTESTS
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#define _NET_SELFTESTS
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#include <linux/ethtool.h>
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void net_selftest(struct net_device *ndev, struct ethtool_test *etest,
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u64 *buf);
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int net_selftest_get_count(void);
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void net_selftest_get_strings(u8 *data);
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#endif /* _NET_SELFTESTS */
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@ -429,6 +429,10 @@ config GRO_CELLS
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config SOCK_VALIDATE_XMIT
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bool
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config NET_SELFTESTS
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def_tristate PHYLIB
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depends on PHYLIB
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config NET_SOCK_MSG
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bool
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default n
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@ -33,6 +33,7 @@ obj-$(CONFIG_NET_DEVLINK) += devlink.o
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obj-$(CONFIG_GRO_CELLS) += gro_cells.o
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obj-$(CONFIG_FAILOVER) += failover.o
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ifeq ($(CONFIG_INET),y)
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obj-$(CONFIG_NET_SELFTESTS) += selftests.o
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obj-$(CONFIG_NET_SOCK_MSG) += skmsg.o
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obj-$(CONFIG_BPF_SYSCALL) += sock_map.o
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endif
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400
net/core/selftests.c
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400
net/core/selftests.c
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@ -0,0 +1,400 @@
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// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2019 Synopsys, Inc. and/or its affiliates.
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* stmmac Selftests Support
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*
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* Author: Jose Abreu <joabreu@synopsys.com>
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*
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* Ported from stmmac by:
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* Copyright (C) 2021 Oleksij Rempel <o.rempel@pengutronix.de>
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*/
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#include <linux/phy.h>
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#include <net/selftests.h>
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#include <net/tcp.h>
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#include <net/udp.h>
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struct net_packet_attrs {
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unsigned char *src;
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unsigned char *dst;
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u32 ip_src;
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u32 ip_dst;
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bool tcp;
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u16 sport;
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u16 dport;
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int timeout;
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int size;
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int max_size;
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u8 id;
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u16 queue_mapping;
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};
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struct net_test_priv {
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struct net_packet_attrs *packet;
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struct packet_type pt;
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struct completion comp;
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int double_vlan;
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int vlan_id;
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int ok;
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};
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struct netsfhdr {
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__be32 version;
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__be64 magic;
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u8 id;
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} __packed;
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static u8 net_test_next_id;
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#define NET_TEST_PKT_SIZE (sizeof(struct ethhdr) + sizeof(struct iphdr) + \
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sizeof(struct netsfhdr))
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#define NET_TEST_PKT_MAGIC 0xdeadcafecafedeadULL
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#define NET_LB_TIMEOUT msecs_to_jiffies(200)
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static struct sk_buff *net_test_get_skb(struct net_device *ndev,
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struct net_packet_attrs *attr)
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{
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struct sk_buff *skb = NULL;
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struct udphdr *uhdr = NULL;
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struct tcphdr *thdr = NULL;
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struct netsfhdr *shdr;
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struct ethhdr *ehdr;
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struct iphdr *ihdr;
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int iplen, size;
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size = attr->size + NET_TEST_PKT_SIZE;
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if (attr->tcp)
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size += sizeof(struct tcphdr);
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else
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size += sizeof(struct udphdr);
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if (attr->max_size && attr->max_size > size)
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size = attr->max_size;
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skb = netdev_alloc_skb(ndev, size);
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if (!skb)
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return NULL;
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prefetchw(skb->data);
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ehdr = skb_push(skb, ETH_HLEN);
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skb_reset_mac_header(skb);
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skb_set_network_header(skb, skb->len);
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ihdr = skb_put(skb, sizeof(*ihdr));
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skb_set_transport_header(skb, skb->len);
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if (attr->tcp)
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thdr = skb_put(skb, sizeof(*thdr));
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else
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uhdr = skb_put(skb, sizeof(*uhdr));
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eth_zero_addr(ehdr->h_dest);
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if (attr->src)
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ether_addr_copy(ehdr->h_source, attr->src);
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if (attr->dst)
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ether_addr_copy(ehdr->h_dest, attr->dst);
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ehdr->h_proto = htons(ETH_P_IP);
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if (attr->tcp) {
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thdr->source = htons(attr->sport);
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thdr->dest = htons(attr->dport);
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thdr->doff = sizeof(struct tcphdr) / 4;
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thdr->check = 0;
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} else {
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uhdr->source = htons(attr->sport);
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uhdr->dest = htons(attr->dport);
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uhdr->len = htons(sizeof(*shdr) + sizeof(*uhdr) + attr->size);
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if (attr->max_size)
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uhdr->len = htons(attr->max_size -
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(sizeof(*ihdr) + sizeof(*ehdr)));
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uhdr->check = 0;
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}
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ihdr->ihl = 5;
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ihdr->ttl = 32;
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ihdr->version = 4;
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if (attr->tcp)
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ihdr->protocol = IPPROTO_TCP;
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else
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ihdr->protocol = IPPROTO_UDP;
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iplen = sizeof(*ihdr) + sizeof(*shdr) + attr->size;
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if (attr->tcp)
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iplen += sizeof(*thdr);
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else
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iplen += sizeof(*uhdr);
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if (attr->max_size)
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iplen = attr->max_size - sizeof(*ehdr);
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ihdr->tot_len = htons(iplen);
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ihdr->frag_off = 0;
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ihdr->saddr = htonl(attr->ip_src);
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ihdr->daddr = htonl(attr->ip_dst);
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ihdr->tos = 0;
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ihdr->id = 0;
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ip_send_check(ihdr);
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shdr = skb_put(skb, sizeof(*shdr));
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shdr->version = 0;
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shdr->magic = cpu_to_be64(NET_TEST_PKT_MAGIC);
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attr->id = net_test_next_id;
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shdr->id = net_test_next_id++;
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if (attr->size)
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skb_put(skb, attr->size);
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if (attr->max_size && attr->max_size > skb->len)
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skb_put(skb, attr->max_size - skb->len);
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skb->csum = 0;
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skb->ip_summed = CHECKSUM_PARTIAL;
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if (attr->tcp) {
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thdr->check = ~tcp_v4_check(skb->len, ihdr->saddr,
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ihdr->daddr, 0);
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skb->csum_start = skb_transport_header(skb) - skb->head;
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skb->csum_offset = offsetof(struct tcphdr, check);
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} else {
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udp4_hwcsum(skb, ihdr->saddr, ihdr->daddr);
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}
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skb->protocol = htons(ETH_P_IP);
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skb->pkt_type = PACKET_HOST;
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skb->dev = ndev;
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return skb;
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}
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static int net_test_loopback_validate(struct sk_buff *skb,
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struct net_device *ndev,
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struct packet_type *pt,
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struct net_device *orig_ndev)
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{
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struct net_test_priv *tpriv = pt->af_packet_priv;
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unsigned char *src = tpriv->packet->src;
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unsigned char *dst = tpriv->packet->dst;
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struct netsfhdr *shdr;
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struct ethhdr *ehdr;
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struct udphdr *uhdr;
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struct tcphdr *thdr;
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struct iphdr *ihdr;
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skb = skb_unshare(skb, GFP_ATOMIC);
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if (!skb)
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goto out;
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if (skb_linearize(skb))
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goto out;
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if (skb_headlen(skb) < (NET_TEST_PKT_SIZE - ETH_HLEN))
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goto out;
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ehdr = (struct ethhdr *)skb_mac_header(skb);
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if (dst) {
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if (!ether_addr_equal_unaligned(ehdr->h_dest, dst))
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goto out;
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}
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if (src) {
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if (!ether_addr_equal_unaligned(ehdr->h_source, src))
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goto out;
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}
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ihdr = ip_hdr(skb);
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if (tpriv->double_vlan)
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ihdr = (struct iphdr *)(skb_network_header(skb) + 4);
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if (tpriv->packet->tcp) {
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if (ihdr->protocol != IPPROTO_TCP)
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goto out;
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thdr = (struct tcphdr *)((u8 *)ihdr + 4 * ihdr->ihl);
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if (thdr->dest != htons(tpriv->packet->dport))
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goto out;
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shdr = (struct netsfhdr *)((u8 *)thdr + sizeof(*thdr));
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} else {
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if (ihdr->protocol != IPPROTO_UDP)
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goto out;
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uhdr = (struct udphdr *)((u8 *)ihdr + 4 * ihdr->ihl);
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if (uhdr->dest != htons(tpriv->packet->dport))
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goto out;
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shdr = (struct netsfhdr *)((u8 *)uhdr + sizeof(*uhdr));
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}
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if (shdr->magic != cpu_to_be64(NET_TEST_PKT_MAGIC))
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goto out;
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if (tpriv->packet->id != shdr->id)
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goto out;
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tpriv->ok = true;
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complete(&tpriv->comp);
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out:
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kfree_skb(skb);
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return 0;
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}
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static int __net_test_loopback(struct net_device *ndev,
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struct net_packet_attrs *attr)
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{
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struct net_test_priv *tpriv;
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struct sk_buff *skb = NULL;
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int ret = 0;
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tpriv = kzalloc(sizeof(*tpriv), GFP_KERNEL);
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if (!tpriv)
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return -ENOMEM;
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tpriv->ok = false;
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init_completion(&tpriv->comp);
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tpriv->pt.type = htons(ETH_P_IP);
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tpriv->pt.func = net_test_loopback_validate;
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tpriv->pt.dev = ndev;
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tpriv->pt.af_packet_priv = tpriv;
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tpriv->packet = attr;
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dev_add_pack(&tpriv->pt);
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skb = net_test_get_skb(ndev, attr);
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if (!skb) {
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ret = -ENOMEM;
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goto cleanup;
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}
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ret = dev_direct_xmit(skb, attr->queue_mapping);
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if (ret < 0) {
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goto cleanup;
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} else if (ret > 0) {
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ret = -ENETUNREACH;
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goto cleanup;
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}
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if (!attr->timeout)
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attr->timeout = NET_LB_TIMEOUT;
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wait_for_completion_timeout(&tpriv->comp, attr->timeout);
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ret = tpriv->ok ? 0 : -ETIMEDOUT;
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cleanup:
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dev_remove_pack(&tpriv->pt);
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kfree(tpriv);
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return ret;
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}
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static int net_test_netif_carrier(struct net_device *ndev)
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{
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return netif_carrier_ok(ndev) ? 0 : -ENOLINK;
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}
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static int net_test_phy_phydev(struct net_device *ndev)
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{
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return ndev->phydev ? 0 : -EOPNOTSUPP;
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}
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static int net_test_phy_loopback_enable(struct net_device *ndev)
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{
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if (!ndev->phydev)
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return -EOPNOTSUPP;
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return phy_loopback(ndev->phydev, true);
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}
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static int net_test_phy_loopback_disable(struct net_device *ndev)
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{
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if (!ndev->phydev)
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return -EOPNOTSUPP;
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return phy_loopback(ndev->phydev, false);
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}
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static int net_test_phy_loopback_udp(struct net_device *ndev)
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{
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struct net_packet_attrs attr = { };
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attr.dst = ndev->dev_addr;
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return __net_test_loopback(ndev, &attr);
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}
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static int net_test_phy_loopback_tcp(struct net_device *ndev)
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{
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struct net_packet_attrs attr = { };
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attr.dst = ndev->dev_addr;
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attr.tcp = true;
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return __net_test_loopback(ndev, &attr);
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}
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static const struct net_test {
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char name[ETH_GSTRING_LEN];
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int (*fn)(struct net_device *ndev);
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} net_selftests[] = {
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{
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.name = "Carrier ",
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.fn = net_test_netif_carrier,
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}, {
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.name = "PHY dev is present ",
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.fn = net_test_phy_phydev,
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}, {
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/* This test should be done before all PHY loopback test */
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.name = "PHY internal loopback, enable ",
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.fn = net_test_phy_loopback_enable,
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}, {
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.name = "PHY internal loopback, UDP ",
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.fn = net_test_phy_loopback_udp,
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}, {
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.name = "PHY internal loopback, TCP ",
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.fn = net_test_phy_loopback_tcp,
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}, {
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/* This test should be done after all PHY loopback test */
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.name = "PHY internal loopback, disable",
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.fn = net_test_phy_loopback_disable,
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},
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};
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void net_selftest(struct net_device *ndev, struct ethtool_test *etest, u64 *buf)
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{
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int count = net_selftest_get_count();
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int i;
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memset(buf, 0, sizeof(*buf) * count);
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net_test_next_id = 0;
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if (etest->flags != ETH_TEST_FL_OFFLINE) {
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netdev_err(ndev, "Only offline tests are supported\n");
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etest->flags |= ETH_TEST_FL_FAILED;
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return;
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}
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for (i = 0; i < count; i++) {
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buf[i] = net_selftests[i].fn(ndev);
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if (buf[i] && (buf[i] != -EOPNOTSUPP))
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etest->flags |= ETH_TEST_FL_FAILED;
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}
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}
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EXPORT_SYMBOL_GPL(net_selftest);
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int net_selftest_get_count(void)
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{
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return ARRAY_SIZE(net_selftests);
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}
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EXPORT_SYMBOL_GPL(net_selftest_get_count);
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void net_selftest_get_strings(u8 *data)
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{
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u8 *p = data;
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int i;
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for (i = 0; i < net_selftest_get_count(); i++) {
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snprintf(p, ETH_GSTRING_LEN, "%2d. %s", i + 1,
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net_selftests[i].name);
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p += ETH_GSTRING_LEN;
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}
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}
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EXPORT_SYMBOL_GPL(net_selftest_get_strings);
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MODULE_LICENSE("GPL v2");
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MODULE_AUTHOR("Oleksij Rempel <o.rempel@pengutronix.de>");
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