forked from mirrors/linux
ethtool: add ethtool_rx_flow_spec to flow_rule structure translator
This patch adds a function to translate the ethtool_rx_flow_spec structure to the flow_rule representation. This allows us to reuse code from the driver side given that both flower and ethtool_rx_flow interfaces use the same representation. This patch also includes support for the flow type flags FLOW_EXT, FLOW_MAC_EXT and FLOW_RSS. The ethtool_rx_flow_spec_input wrapper structure is used to convey the rss_context field, that is away from the ethtool_rx_flow_spec structure, and the ethtool_rx_flow_spec structure. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Pablo Neira Ayuso
David S. Miller
parent
8bec2833fb
commit
eca4205f9e
2 changed files with 256 additions and 0 deletions
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@ -400,4 +400,19 @@ struct ethtool_ops {
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void (*get_ethtool_phy_stats)(struct net_device *,
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struct ethtool_stats *, u64 *);
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};
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struct ethtool_rx_flow_rule {
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struct flow_rule *rule;
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unsigned long priv[0];
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};
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struct ethtool_rx_flow_spec_input {
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const struct ethtool_rx_flow_spec *fs;
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u32 rss_ctx;
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};
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struct ethtool_rx_flow_rule *
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ethtool_rx_flow_rule_create(const struct ethtool_rx_flow_spec_input *input);
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void ethtool_rx_flow_rule_destroy(struct ethtool_rx_flow_rule *rule);
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#endif /* _LINUX_ETHTOOL_H */
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@ -29,6 +29,7 @@
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#include <linux/net.h>
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#include <net/devlink.h>
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#include <net/xdp_sock.h>
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#include <net/flow_offload.h>
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/*
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* Some useful ethtool_ops methods that're device independent.
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@ -2820,3 +2821,243 @@ int dev_ethtool(struct net *net, struct ifreq *ifr)
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return rc;
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}
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struct ethtool_rx_flow_key {
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struct flow_dissector_key_basic basic;
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union {
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struct flow_dissector_key_ipv4_addrs ipv4;
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struct flow_dissector_key_ipv6_addrs ipv6;
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};
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struct flow_dissector_key_ports tp;
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struct flow_dissector_key_ip ip;
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struct flow_dissector_key_vlan vlan;
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struct flow_dissector_key_eth_addrs eth_addrs;
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} __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */
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struct ethtool_rx_flow_match {
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struct flow_dissector dissector;
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struct ethtool_rx_flow_key key;
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struct ethtool_rx_flow_key mask;
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};
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struct ethtool_rx_flow_rule *
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ethtool_rx_flow_rule_create(const struct ethtool_rx_flow_spec_input *input)
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{
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const struct ethtool_rx_flow_spec *fs = input->fs;
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static struct in6_addr zero_addr = {};
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struct ethtool_rx_flow_match *match;
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struct ethtool_rx_flow_rule *flow;
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struct flow_action_entry *act;
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flow = kzalloc(sizeof(struct ethtool_rx_flow_rule) +
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sizeof(struct ethtool_rx_flow_match), GFP_KERNEL);
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if (!flow)
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return ERR_PTR(-ENOMEM);
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/* ethtool_rx supports only one single action per rule. */
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flow->rule = flow_rule_alloc(1);
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if (!flow->rule) {
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kfree(flow);
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return ERR_PTR(-ENOMEM);
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}
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match = (struct ethtool_rx_flow_match *)flow->priv;
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flow->rule->match.dissector = &match->dissector;
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flow->rule->match.mask = &match->mask;
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flow->rule->match.key = &match->key;
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match->mask.basic.n_proto = htons(0xffff);
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switch (fs->flow_type & ~(FLOW_EXT | FLOW_MAC_EXT | FLOW_RSS)) {
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case TCP_V4_FLOW:
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case UDP_V4_FLOW: {
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const struct ethtool_tcpip4_spec *v4_spec, *v4_m_spec;
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match->key.basic.n_proto = htons(ETH_P_IP);
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v4_spec = &fs->h_u.tcp_ip4_spec;
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v4_m_spec = &fs->m_u.tcp_ip4_spec;
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if (v4_m_spec->ip4src) {
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match->key.ipv4.src = v4_spec->ip4src;
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match->mask.ipv4.src = v4_m_spec->ip4src;
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}
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if (v4_m_spec->ip4dst) {
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match->key.ipv4.dst = v4_spec->ip4dst;
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match->mask.ipv4.dst = v4_m_spec->ip4dst;
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}
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if (v4_m_spec->ip4src ||
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v4_m_spec->ip4dst) {
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match->dissector.used_keys |=
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BIT(FLOW_DISSECTOR_KEY_IPV4_ADDRS);
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match->dissector.offset[FLOW_DISSECTOR_KEY_IPV4_ADDRS] =
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offsetof(struct ethtool_rx_flow_key, ipv4);
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}
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if (v4_m_spec->psrc) {
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match->key.tp.src = v4_spec->psrc;
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match->mask.tp.src = v4_m_spec->psrc;
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}
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if (v4_m_spec->pdst) {
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match->key.tp.dst = v4_spec->pdst;
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match->mask.tp.dst = v4_m_spec->pdst;
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}
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if (v4_m_spec->psrc ||
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v4_m_spec->pdst) {
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match->dissector.used_keys |=
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BIT(FLOW_DISSECTOR_KEY_PORTS);
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match->dissector.offset[FLOW_DISSECTOR_KEY_PORTS] =
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offsetof(struct ethtool_rx_flow_key, tp);
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}
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if (v4_m_spec->tos) {
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match->key.ip.tos = v4_spec->tos;
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match->mask.ip.tos = v4_m_spec->tos;
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match->dissector.used_keys |=
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BIT(FLOW_DISSECTOR_KEY_IP);
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match->dissector.offset[FLOW_DISSECTOR_KEY_IP] =
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offsetof(struct ethtool_rx_flow_key, ip);
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}
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}
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break;
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case TCP_V6_FLOW:
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case UDP_V6_FLOW: {
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const struct ethtool_tcpip6_spec *v6_spec, *v6_m_spec;
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match->key.basic.n_proto = htons(ETH_P_IPV6);
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v6_spec = &fs->h_u.tcp_ip6_spec;
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v6_m_spec = &fs->m_u.tcp_ip6_spec;
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if (memcmp(v6_m_spec->ip6src, &zero_addr, sizeof(zero_addr))) {
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memcpy(&match->key.ipv6.src, v6_spec->ip6src,
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sizeof(match->key.ipv6.src));
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memcpy(&match->mask.ipv6.src, v6_m_spec->ip6src,
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sizeof(match->mask.ipv6.src));
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}
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if (memcmp(v6_m_spec->ip6dst, &zero_addr, sizeof(zero_addr))) {
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memcpy(&match->key.ipv6.dst, v6_spec->ip6dst,
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sizeof(match->key.ipv6.dst));
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memcpy(&match->mask.ipv6.dst, v6_m_spec->ip6dst,
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sizeof(match->mask.ipv6.dst));
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}
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if (memcmp(v6_m_spec->ip6src, &zero_addr, sizeof(zero_addr)) ||
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memcmp(v6_m_spec->ip6src, &zero_addr, sizeof(zero_addr))) {
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match->dissector.used_keys |=
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BIT(FLOW_DISSECTOR_KEY_IPV6_ADDRS);
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match->dissector.offset[FLOW_DISSECTOR_KEY_IPV6_ADDRS] =
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offsetof(struct ethtool_rx_flow_key, ipv6);
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}
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if (v6_m_spec->psrc) {
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match->key.tp.src = v6_spec->psrc;
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match->mask.tp.src = v6_m_spec->psrc;
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}
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if (v6_m_spec->pdst) {
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match->key.tp.dst = v6_spec->pdst;
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match->mask.tp.dst = v6_m_spec->pdst;
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}
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if (v6_m_spec->psrc ||
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v6_m_spec->pdst) {
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match->dissector.used_keys |=
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BIT(FLOW_DISSECTOR_KEY_PORTS);
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match->dissector.offset[FLOW_DISSECTOR_KEY_PORTS] =
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offsetof(struct ethtool_rx_flow_key, tp);
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}
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if (v6_m_spec->tclass) {
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match->key.ip.tos = v6_spec->tclass;
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match->mask.ip.tos = v6_m_spec->tclass;
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match->dissector.used_keys |=
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BIT(FLOW_DISSECTOR_KEY_IP);
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match->dissector.offset[FLOW_DISSECTOR_KEY_IP] =
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offsetof(struct ethtool_rx_flow_key, ip);
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}
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}
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break;
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default:
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ethtool_rx_flow_rule_destroy(flow);
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return ERR_PTR(-EINVAL);
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}
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switch (fs->flow_type & ~(FLOW_EXT | FLOW_MAC_EXT | FLOW_RSS)) {
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case TCP_V4_FLOW:
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case TCP_V6_FLOW:
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match->key.basic.ip_proto = IPPROTO_TCP;
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break;
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case UDP_V4_FLOW:
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case UDP_V6_FLOW:
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match->key.basic.ip_proto = IPPROTO_UDP;
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break;
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}
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match->mask.basic.ip_proto = 0xff;
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match->dissector.used_keys |= BIT(FLOW_DISSECTOR_KEY_BASIC);
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match->dissector.offset[FLOW_DISSECTOR_KEY_BASIC] =
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offsetof(struct ethtool_rx_flow_key, basic);
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if (fs->flow_type & FLOW_EXT) {
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const struct ethtool_flow_ext *ext_h_spec = &fs->h_ext;
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const struct ethtool_flow_ext *ext_m_spec = &fs->m_ext;
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if (ext_m_spec->vlan_etype &&
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ext_m_spec->vlan_tci) {
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match->key.vlan.vlan_tpid = ext_h_spec->vlan_etype;
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match->mask.vlan.vlan_tpid = ext_m_spec->vlan_etype;
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match->key.vlan.vlan_id =
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ntohs(ext_h_spec->vlan_tci) & 0x0fff;
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match->mask.vlan.vlan_id =
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ntohs(ext_m_spec->vlan_tci) & 0x0fff;
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match->key.vlan.vlan_priority =
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(ntohs(ext_h_spec->vlan_tci) & 0xe000) >> 13;
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match->mask.vlan.vlan_priority =
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(ntohs(ext_m_spec->vlan_tci) & 0xe000) >> 13;
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match->dissector.used_keys |=
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BIT(FLOW_DISSECTOR_KEY_VLAN);
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match->dissector.offset[FLOW_DISSECTOR_KEY_VLAN] =
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offsetof(struct ethtool_rx_flow_key, vlan);
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}
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}
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if (fs->flow_type & FLOW_MAC_EXT) {
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const struct ethtool_flow_ext *ext_h_spec = &fs->h_ext;
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const struct ethtool_flow_ext *ext_m_spec = &fs->m_ext;
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if (ext_m_spec->h_dest) {
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memcpy(match->key.eth_addrs.dst, ext_h_spec->h_dest,
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ETH_ALEN);
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memcpy(match->mask.eth_addrs.dst, ext_m_spec->h_dest,
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ETH_ALEN);
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match->dissector.used_keys |=
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BIT(FLOW_DISSECTOR_KEY_ETH_ADDRS);
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match->dissector.offset[FLOW_DISSECTOR_KEY_ETH_ADDRS] =
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offsetof(struct ethtool_rx_flow_key, eth_addrs);
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}
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}
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act = &flow->rule->action.entries[0];
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switch (fs->ring_cookie) {
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case RX_CLS_FLOW_DISC:
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act->id = FLOW_ACTION_DROP;
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break;
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case RX_CLS_FLOW_WAKE:
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act->id = FLOW_ACTION_WAKE;
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break;
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default:
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act->id = FLOW_ACTION_QUEUE;
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if (fs->flow_type & FLOW_RSS)
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act->queue.ctx = input->rss_ctx;
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act->queue.vf = ethtool_get_flow_spec_ring_vf(fs->ring_cookie);
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act->queue.index = ethtool_get_flow_spec_ring(fs->ring_cookie);
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break;
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}
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return flow;
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}
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EXPORT_SYMBOL(ethtool_rx_flow_rule_create);
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void ethtool_rx_flow_rule_destroy(struct ethtool_rx_flow_rule *flow)
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{
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kfree(flow->rule);
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kfree(flow);
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}
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EXPORT_SYMBOL(ethtool_rx_flow_rule_destroy);
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