--- /dev/null
+#ifdef CONFIG_COMPAT_FLOW_DISSECTOR
+
+#include <linux/kernel.h>
+#include <linux/skbuff.h>
+#include <linux/export.h>
+#include <linux/ip.h>
+#include <linux/ipv6.h>
+#include <linux/if_vlan.h>
+#include <net/ip.h>
+#include <net/ipv6.h>
+#ifdef __GRE_SUPPORT__
+#include <net/gre.h>
+#endif
+#ifdef __PPTP_SUPPORT__
+#include <net/pptp.h>
+#endif
+#ifdef __TIPC_SUPPORT__
+#include <net/tipc.h>
+#endif
+#include <linux/igmp.h>
+#include <linux/icmp.h>
+#include <linux/sctp.h>
+#include <linux/dccp.h>
+#include <linux/if_tunnel.h>
+#include <linux/if_pppox.h>
+#include <linux/ppp_defs.h>
+#include <linux/stddef.h>
+#include <linux/if_ether.h>
+#include <linux/mpls.h>
+#include <linux/tcp.h>
+#include <net/dsfield.h>
+#include <net/flow_dissector.h>
+#include <scsi/fc/fc_fcoe.h>
+#include <net/dst_metadata.h>
+
+#ifndef IP6_OFFSET
+#define IP6_OFFSET 0xFFF8
+#endif
+
+#ifndef MPLS_LABEL_ENTROPY
+#define MPLS_LABEL_ENTROPY 7 /* RFC6790 */
+#endif
+
+#ifndef IPPROTO_MPLS
+#define IPPROTO_MPLS 137
+#endif
+
+static inline bool eth_type_vlan_bp(__be16 ethertype)
+{
+ switch (ethertype) {
+ case htons(ETH_P_8021Q):
+ case htons(ETH_P_8021AD):
+ return true;
+ default:
+ return false;
+ }
+}
+#ifndef CONFIG_NET_SCHED_NEW
+bool skb_flow_dissect_flow_keys(const struct sk_buff *skb,
+ struct flow_keys *flow,
+ unsigned int flags)
+{
+ memset(flow, 0, sizeof(*flow));
+ return __skb_flow_dissect(skb, &flow_keys_dissector, flow,
+ NULL, 0, 0, 0, flags);
+}
+EXPORT_SYMBOL(skb_flow_dissect_flow_keys);
+#endif
+
+#ifndef HAVE_SKB_FLOW_DISSECT
+static void dissector_set_key(struct flow_dissector *flow_dissector,
+ enum flow_dissector_key_id key_id)
+{
+ flow_dissector->used_keys |= (1 << key_id);
+}
+
+void skb_flow_dissector_init(struct flow_dissector *flow_dissector,
+ const struct flow_dissector_key *key,
+ unsigned int key_count)
+{
+ unsigned int i;
+
+ memset(flow_dissector, 0, sizeof(*flow_dissector));
+
+ for (i = 0; i < key_count; i++, key++) {
+ /* User should make sure that every key target offset is withing
+ * boundaries of unsigned short.
+ */
+ BUG_ON(key->offset > USHRT_MAX);
+ BUG_ON(dissector_uses_key(flow_dissector,
+ key->key_id));
+
+ dissector_set_key(flow_dissector, key->key_id);
+ flow_dissector->offset[key->key_id] = key->offset;
+ }
+
+ /* Ensure that the dissector always includes control and basic key.
+ * That way we are able to avoid handling lack of these in fast path.
+ */
+ BUG_ON(!dissector_uses_key(flow_dissector,
+ FLOW_DISSECTOR_KEY_CONTROL));
+ BUG_ON(!dissector_uses_key(flow_dissector,
+ FLOW_DISSECTOR_KEY_BASIC));
+}
+EXPORT_SYMBOL(skb_flow_dissector_init);
+
+/**
+ * skb_flow_get_be16 - extract be16 entity
+ * @skb: sk_buff to extract from
+ * @poff: offset to extract at
+ * @data: raw buffer pointer to the packet
+ * @hlen: packet header length
+ *
+ * The function will try to retrieve a be32 entity at
+ * offset poff
+ */
+static __be16 skb_flow_get_be16(const struct sk_buff *skb, int poff,
+ void *data, int hlen)
+{
+ __be16 *u, _u;
+
+ u = __skb_header_pointer(skb, poff, sizeof(_u), data, hlen, &_u);
+ if (u)
+ return *u;
+
+ return 0;
+}
+
+/**
+ * __skb_flow_get_ports - extract the upper layer ports and return them
+ * @skb: sk_buff to extract the ports from
+ * @thoff: transport header offset
+ * @ip_proto: protocol for which to get port offset
+ * @data: raw buffer pointer to the packet, if NULL use skb->data
+ * @hlen: packet header length, if @data is NULL use skb_headlen(skb)
+ *
+ * The function will try to retrieve the ports at offset thoff + poff where poff
+ * is the protocol port offset returned from proto_ports_offset
+ */
+__be32 __skb_flow_get_ports(const struct sk_buff *skb, int thoff, u8 ip_proto,
+ void *data, int hlen)
+{
+ int poff = proto_ports_offset(ip_proto);
+
+ if (!data) {
+ data = skb->data;
+ hlen = skb_headlen(skb);
+ }
+
+ if (poff >= 0) {
+ __be32 *ports, _ports;
+
+ ports = __skb_header_pointer(skb, thoff + poff,
+ sizeof(_ports), data, hlen, &_ports);
+ if (ports)
+ return *ports;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL(__skb_flow_get_ports);
+
+#ifdef HAVE_IP_TUNNEL_INFO
+static void
+skb_flow_dissect_set_enc_addr_type(enum flow_dissector_key_id type,
+ struct flow_dissector *flow_dissector,
+ void *target_container)
+{
+ struct flow_dissector_key_control *ctrl;
+
+ if (!dissector_uses_key(flow_dissector, FLOW_DISSECTOR_KEY_ENC_CONTROL))
+ return;
+
+ ctrl = skb_flow_dissector_target(flow_dissector,
+ FLOW_DISSECTOR_KEY_ENC_CONTROL,
+ target_container);
+ ctrl->addr_type = type;
+}
+static void
+__skb_flow_dissect_tunnel_info(const struct sk_buff *skb,
+ struct flow_dissector *flow_dissector,
+ void *target_container)
+{
+ struct ip_tunnel_info *info;
+ struct ip_tunnel_key *key;
+
+ /* A quick check to see if there might be something to do. */
+ if (!dissector_uses_key(flow_dissector,
+ FLOW_DISSECTOR_KEY_ENC_KEYID) &&
+ !dissector_uses_key(flow_dissector,
+ FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS) &&
+ !dissector_uses_key(flow_dissector,
+ FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS) &&
+ !dissector_uses_key(flow_dissector,
+ FLOW_DISSECTOR_KEY_ENC_CONTROL) &&
+ !dissector_uses_key(flow_dissector,
+ FLOW_DISSECTOR_KEY_ENC_PORTS) &&
+ !dissector_uses_key(flow_dissector,
+ FLOW_DISSECTOR_KEY_ENC_IP))
+ return;
+
+ info = skb_tunnel_info((struct sk_buff *)skb);
+ if (!info)
+ return;
+
+ key = &info->key;
+
+ switch (ip_tunnel_info_af(info)) {
+ case AF_INET:
+ skb_flow_dissect_set_enc_addr_type(FLOW_DISSECTOR_KEY_IPV4_ADDRS,
+ flow_dissector,
+ target_container);
+ if (dissector_uses_key(flow_dissector,
+ FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS)) {
+ struct flow_dissector_key_ipv4_addrs *ipv4;
+
+ ipv4 = skb_flow_dissector_target(flow_dissector,
+ FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS,
+ target_container);
+ ipv4->src = key->u.ipv4.src;
+ ipv4->dst = key->u.ipv4.dst;
+ }
+ break;
+ case AF_INET6:
+ skb_flow_dissect_set_enc_addr_type(FLOW_DISSECTOR_KEY_IPV6_ADDRS,
+ flow_dissector,
+ target_container);
+ if (dissector_uses_key(flow_dissector,
+ FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS)) {
+ struct flow_dissector_key_ipv6_addrs *ipv6;
+
+ ipv6 = skb_flow_dissector_target(flow_dissector,
+ FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS,
+ target_container);
+ ipv6->src = key->u.ipv6.src;
+ ipv6->dst = key->u.ipv6.dst;
+ }
+ break;
+ }
+
+ if (dissector_uses_key(flow_dissector, FLOW_DISSECTOR_KEY_ENC_KEYID)) {
+ struct flow_dissector_key_keyid *keyid;
+
+ keyid = skb_flow_dissector_target(flow_dissector,
+ FLOW_DISSECTOR_KEY_ENC_KEYID,
+ target_container);
+ keyid->keyid = tunnel_id_to_key32(key->tun_id);
+ }
+
+ if (dissector_uses_key(flow_dissector, FLOW_DISSECTOR_KEY_ENC_PORTS)) {
+ struct flow_dissector_key_ports *tp;
+
+ tp = skb_flow_dissector_target(flow_dissector,
+ FLOW_DISSECTOR_KEY_ENC_PORTS,
+ target_container);
+ tp->src = key->tp_src;
+ tp->dst = key->tp_dst;
+ }
+
+ if (dissector_uses_key(flow_dissector, FLOW_DISSECTOR_KEY_ENC_IP)) {
+ struct flow_dissector_key_ip *ip;
+
+ ip = skb_flow_dissector_target(flow_dissector,
+ FLOW_DISSECTOR_KEY_ENC_IP,
+ target_container);
+ ip->tos = key->tos;
+ ip->ttl = key->ttl;
+ }
+
+}
+#endif /* HAVE_IP_TUNNEL_INFO */
+
+static enum flow_dissect_ret
+__skb_flow_dissect_mpls(const struct sk_buff *skb,
+ struct flow_dissector *flow_dissector,
+ void *target_container, void *data, int nhoff, int hlen)
+{
+ struct flow_dissector_key_keyid *key_keyid;
+ struct mpls_label *hdr, _hdr[2];
+ u32 entry, label;
+
+ if (!dissector_uses_key(flow_dissector,
+ FLOW_DISSECTOR_KEY_MPLS_ENTROPY) &&
+ !dissector_uses_key(flow_dissector, FLOW_DISSECTOR_KEY_MPLS))
+ return FLOW_DISSECT_RET_OUT_GOOD;
+
+ hdr = __skb_header_pointer(skb, nhoff, sizeof(_hdr), data,
+ hlen, &_hdr);
+ if (!hdr)
+ return FLOW_DISSECT_RET_OUT_BAD;
+
+ entry = ntohl(hdr[0].entry);
+ label = (entry & MPLS_LS_LABEL_MASK) >> MPLS_LS_LABEL_SHIFT;
+
+ if (dissector_uses_key(flow_dissector, FLOW_DISSECTOR_KEY_MPLS)) {
+ struct flow_dissector_key_mpls *key_mpls;
+
+ key_mpls = skb_flow_dissector_target(flow_dissector,
+ FLOW_DISSECTOR_KEY_MPLS,
+ target_container);
+ key_mpls->mpls_label = label;
+ key_mpls->mpls_ttl = (entry & MPLS_LS_TTL_MASK)
+ >> MPLS_LS_TTL_SHIFT;
+ key_mpls->mpls_tc = (entry & MPLS_LS_TC_MASK)
+ >> MPLS_LS_TC_SHIFT;
+ key_mpls->mpls_bos = (entry & MPLS_LS_S_MASK)
+ >> MPLS_LS_S_SHIFT;
+ }
+
+ if (label == MPLS_LABEL_ENTROPY) {
+ key_keyid = skb_flow_dissector_target(flow_dissector,
+ FLOW_DISSECTOR_KEY_MPLS_ENTROPY,
+ target_container);
+ key_keyid->keyid = hdr[1].entry & htonl(MPLS_LS_LABEL_MASK);
+ }
+ return FLOW_DISSECT_RET_OUT_GOOD;
+}
+
+static enum flow_dissect_ret
+__skb_flow_dissect_arp(const struct sk_buff *skb,
+ struct flow_dissector *flow_dissector,
+ void *target_container, void *data, int nhoff, int hlen)
+{
+ struct flow_dissector_key_arp *key_arp;
+ struct {
+ unsigned char ar_sha[ETH_ALEN];
+ unsigned char ar_sip[4];
+ unsigned char ar_tha[ETH_ALEN];
+ unsigned char ar_tip[4];
+ } *arp_eth, _arp_eth;
+ const struct arphdr *arp;
+ struct arphdr _arp;
+
+ if (!dissector_uses_key(flow_dissector, FLOW_DISSECTOR_KEY_ARP))
+ return FLOW_DISSECT_RET_OUT_GOOD;
+
+ arp = __skb_header_pointer(skb, nhoff, sizeof(_arp), data,
+ hlen, &_arp);
+ if (!arp)
+ return FLOW_DISSECT_RET_OUT_BAD;
+
+ if (arp->ar_hrd != htons(ARPHRD_ETHER) ||
+ arp->ar_pro != htons(ETH_P_IP) ||
+ arp->ar_hln != ETH_ALEN ||
+ arp->ar_pln != 4 ||
+ (arp->ar_op != htons(ARPOP_REPLY) &&
+ arp->ar_op != htons(ARPOP_REQUEST)))
+ return FLOW_DISSECT_RET_OUT_BAD;
+
+ arp_eth = __skb_header_pointer(skb, nhoff + sizeof(_arp),
+ sizeof(_arp_eth), data,
+ hlen, &_arp_eth);
+ if (!arp_eth)
+ return FLOW_DISSECT_RET_OUT_BAD;
+
+ key_arp = skb_flow_dissector_target(flow_dissector,
+ FLOW_DISSECTOR_KEY_ARP,
+ target_container);
+
+ memcpy(&key_arp->sip, arp_eth->ar_sip, sizeof(key_arp->sip));
+ memcpy(&key_arp->tip, arp_eth->ar_tip, sizeof(key_arp->tip));
+
+ /* Only store the lower byte of the opcode;
+ * this covers ARPOP_REPLY and ARPOP_REQUEST.
+ */
+ key_arp->op = ntohs(arp->ar_op) & 0xff;
+
+ ether_addr_copy(key_arp->sha, arp_eth->ar_sha);
+ ether_addr_copy(key_arp->tha, arp_eth->ar_tha);
+
+ return FLOW_DISSECT_RET_OUT_GOOD;
+}
+
+#ifdef __GRE_SUPPORT__
+static enum flow_dissect_ret
+__skb_flow_dissect_gre(const struct sk_buff *skb,
+ struct flow_dissector_key_control *key_control,
+ struct flow_dissector *flow_dissector,
+ void *target_container, void *data,
+ __be16 *p_proto, int *p_nhoff, int *p_hlen,
+ unsigned int flags)
+{
+ struct flow_dissector_key_keyid *key_keyid;
+ struct gre_base_hdr *hdr, _hdr;
+ int offset = 0;
+ u16 gre_ver;
+
+ hdr = __skb_header_pointer(skb, *p_nhoff, sizeof(_hdr),
+ data, *p_hlen, &_hdr);
+ if (!hdr)
+ return FLOW_DISSECT_RET_OUT_BAD;
+
+ /* Only look inside GRE without routing */
+ if (hdr->flags & GRE_ROUTING)
+ return FLOW_DISSECT_RET_OUT_GOOD;
+
+ /* Only look inside GRE for version 0 and 1 */
+ gre_ver = ntohs(hdr->flags & GRE_VERSION);
+ if (gre_ver > 1)
+ return FLOW_DISSECT_RET_OUT_GOOD;
+
+ *p_proto = hdr->protocol;
+ if (gre_ver) {
+ /* Version1 must be PPTP, and check the flags */
+ if (!(*p_proto == GRE_PROTO_PPP && (hdr->flags & GRE_KEY)))
+ return FLOW_DISSECT_RET_OUT_GOOD;
+ }
+
+ offset += sizeof(struct gre_base_hdr);
+
+ if (hdr->flags & GRE_CSUM)
+ offset += sizeof(((struct gre_full_hdr *) 0)->csum) +
+ sizeof(((struct gre_full_hdr *) 0)->reserved1);
+
+ if (hdr->flags & GRE_KEY) {
+ const __be32 *keyid;
+ __be32 _keyid;
+
+ keyid = __skb_header_pointer(skb, *p_nhoff + offset,
+ sizeof(_keyid),
+ data, *p_hlen, &_keyid);
+ if (!keyid)
+ return FLOW_DISSECT_RET_OUT_BAD;
+
+ if (dissector_uses_key(flow_dissector,
+ FLOW_DISSECTOR_KEY_GRE_KEYID)) {
+ key_keyid = skb_flow_dissector_target(flow_dissector,
+ FLOW_DISSECTOR_KEY_GRE_KEYID,
+ target_container);
+ if (gre_ver == 0)
+ key_keyid->keyid = *keyid;
+ else
+ key_keyid->keyid = *keyid & GRE_PPTP_KEY_MASK;
+ }
+ offset += sizeof(((struct gre_full_hdr *) 0)->key);
+ }
+
+ if (hdr->flags & GRE_SEQ)
+ offset += sizeof(((struct pptp_gre_header *) 0)->seq);
+
+ if (gre_ver == 0) {
+ if (*p_proto == htons(ETH_P_TEB)) {
+ const struct ethhdr *eth;
+ struct ethhdr _eth;
+
+ eth = __skb_header_pointer(skb, *p_nhoff + offset,
+ sizeof(_eth),
+ data, *p_hlen, &_eth);
+ if (!eth)
+ return FLOW_DISSECT_RET_OUT_BAD;
+ *p_proto = eth->h_proto;
+ offset += sizeof(*eth);
+
+ /* Cap headers that we access via pointers at the
+ * end of the Ethernet header as our maximum alignment
+ * at that point is only 2 bytes.
+ */
+ if (NET_IP_ALIGN)
+ *p_hlen = *p_nhoff + offset;
+ }
+ } else { /* version 1, must be PPTP */
+ u8 _ppp_hdr[PPP_HDRLEN];
+ u8 *ppp_hdr;
+
+ if (hdr->flags & GRE_ACK)
+ offset += sizeof(((struct pptp_gre_header *) 0)->ack);
+
+ ppp_hdr = __skb_header_pointer(skb, *p_nhoff + offset,
+ sizeof(_ppp_hdr),
+ data, *p_hlen, _ppp_hdr);
+ if (!ppp_hdr)
+ return FLOW_DISSECT_RET_OUT_BAD;
+
+ switch (PPP_PROTOCOL(ppp_hdr)) {
+ case PPP_IP:
+ *p_proto = htons(ETH_P_IP);
+ break;
+ case PPP_IPV6:
+ *p_proto = htons(ETH_P_IPV6);
+ break;
+ default:
+ /* Could probably catch some more like MPLS */
+ break;
+ }
+
+ offset += PPP_HDRLEN;
+ }
+
+ *p_nhoff += offset;
+ key_control->flags |= FLOW_DIS_ENCAPSULATION;
+ if (flags & FLOW_DISSECTOR_F_STOP_AT_ENCAP)
+ return FLOW_DISSECT_RET_OUT_GOOD;
+
+ return FLOW_DISSECT_RET_PROTO_AGAIN;
+}
+#endif
+
+static void
+__skb_flow_dissect_tcp(const struct sk_buff *skb,
+ struct flow_dissector *flow_dissector,
+ void *target_container, void *data, int thoff, int hlen)
+{
+ struct flow_dissector_key_tcp *key_tcp;
+ struct tcphdr *th, _th;
+
+ if (!dissector_uses_key(flow_dissector, FLOW_DISSECTOR_KEY_TCP))
+ return;
+
+ th = __skb_header_pointer(skb, thoff, sizeof(_th), data, hlen, &_th);
+ if (!th)
+ return;
+
+ if (unlikely(th->doff * 4 < sizeof(_th)))
+ return;
+
+ key_tcp = skb_flow_dissector_target(flow_dissector,
+ FLOW_DISSECTOR_KEY_TCP,
+ target_container);
+ key_tcp->flags = (*(__be16 *) &tcp_flag_word(th) & htons(0x0FFF));
+}
+
+static void
+__skb_flow_dissect_ipv4(const struct sk_buff *skb,
+ struct flow_dissector *flow_dissector,
+ void *target_container, void *data, const struct iphdr *iph)
+{
+ struct flow_dissector_key_ip *key_ip;
+
+ if (!dissector_uses_key(flow_dissector, FLOW_DISSECTOR_KEY_IP))
+ return;
+
+ key_ip = skb_flow_dissector_target(flow_dissector,
+ FLOW_DISSECTOR_KEY_IP,
+ target_container);
+ key_ip->tos = iph->tos;
+ key_ip->ttl = iph->ttl;
+}
+
+static void
+__skb_flow_dissect_ipv6(const struct sk_buff *skb,
+ struct flow_dissector *flow_dissector,
+ void *target_container, void *data, const struct ipv6hdr *iph)
+{
+ struct flow_dissector_key_ip *key_ip;
+
+ if (!dissector_uses_key(flow_dissector, FLOW_DISSECTOR_KEY_IP))
+ return;
+
+ key_ip = skb_flow_dissector_target(flow_dissector,
+ FLOW_DISSECTOR_KEY_IP,
+ target_container);
+ key_ip->tos = ipv6_get_dsfield(iph);
+ key_ip->ttl = iph->hop_limit;
+}
+
+/* Maximum number of protocol headers that can be parsed in
+ * __skb_flow_dissect
+ */
+#define MAX_FLOW_DISSECT_HDRS 15
+
+static bool skb_flow_dissect_allowed(int *num_hdrs)
+{
+ ++*num_hdrs;
+
+ return (*num_hdrs <= MAX_FLOW_DISSECT_HDRS);
+}
+
+/**
+ * __skb_flow_dissect - extract the flow_keys struct and return it
+ * @skb: sk_buff to extract the flow from, can be NULL if the rest are specified
+ * @flow_dissector: list of keys to dissect
+ * @target_container: target structure to put dissected values into
+ * @data: raw buffer pointer to the packet, if NULL use skb->data
+ * @proto: protocol for which to get the flow, if @data is NULL use skb->protocol
+ * @nhoff: network header offset, if @data is NULL use skb_network_offset(skb)
+ * @hlen: packet header length, if @data is NULL use skb_headlen(skb)
+ *
+ * The function will try to retrieve individual keys into target specified
+ * by flow_dissector from either the skbuff or a raw buffer specified by the
+ * rest parameters.
+ *
+ * Caller must take care of zeroing target container memory.
+ */
+bool __skb_flow_dissect(const struct sk_buff *skb,
+ struct flow_dissector *flow_dissector,
+ void *target_container,
+ void *data, __be16 proto, int nhoff, int hlen,
+ unsigned int flags)
+{
+ struct flow_dissector_key_control *key_control;
+ struct flow_dissector_key_basic *key_basic;
+ struct flow_dissector_key_addrs *key_addrs;
+ struct flow_dissector_key_ports *key_ports;
+ struct flow_dissector_key_icmp *key_icmp;
+ struct flow_dissector_key_tags *key_tags;
+ struct flow_dissector_key_vlan *key_vlan;
+ enum flow_dissect_ret fdret;
+ bool skip_vlan = false;
+ int num_hdrs = 0;
+ u8 ip_proto = 0;
+ bool ret;
+
+ if (!data) {
+ data = skb->data;
+ proto = skb_vlan_tag_present(skb) ?
+ skb->vlan_proto : skb->protocol;
+ nhoff = skb_network_offset(skb);
+ hlen = skb_headlen(skb);
+#if IS_ENABLED(CONFIG_NET_DSA)
+ if (unlikely(skb->dev && netdev_uses_dsa(skb->dev))) {
+ const struct dsa_device_ops *ops;
+ int offset;
+
+ ops = skb->dev->dsa_ptr->tag_ops;
+ if (ops->flow_dissect &&
+ !ops->flow_dissect(skb, &proto, &offset)) {
+ hlen -= offset;
+ nhoff += offset;
+ }
+ }
+#endif
+ }
+
+ /* It is ensured by skb_flow_dissector_init() that control key will
+ * be always present.
+ */
+ key_control = skb_flow_dissector_target(flow_dissector,
+ FLOW_DISSECTOR_KEY_CONTROL,
+ target_container);
+
+ /* It is ensured by skb_flow_dissector_init() that basic key will
+ * be always present.
+ */
+ key_basic = skb_flow_dissector_target(flow_dissector,
+ FLOW_DISSECTOR_KEY_BASIC,
+ target_container);
+
+#ifdef HAVE_IP_TUNNEL_INFO
+ __skb_flow_dissect_tunnel_info(skb, flow_dissector,
+ target_container);
+#endif
+
+ if (dissector_uses_key(flow_dissector,
+ FLOW_DISSECTOR_KEY_ETH_ADDRS)) {
+ struct ethhdr *eth = eth_hdr(skb);
+ struct flow_dissector_key_eth_addrs *key_eth_addrs;
+
+ key_eth_addrs = skb_flow_dissector_target(flow_dissector,
+ FLOW_DISSECTOR_KEY_ETH_ADDRS,
+ target_container);
+ memcpy(key_eth_addrs, ð->h_dest, sizeof(*key_eth_addrs));
+ }
+
+proto_again:
+ fdret = FLOW_DISSECT_RET_CONTINUE;
+
+ switch (proto) {
+ case htons(ETH_P_IP): {
+ const struct iphdr *iph;
+ struct iphdr _iph;
+
+ iph = __skb_header_pointer(skb, nhoff, sizeof(_iph), data, hlen, &_iph);
+ if (!iph || iph->ihl < 5) {
+ fdret = FLOW_DISSECT_RET_OUT_BAD;
+ break;
+ }
+
+ nhoff += iph->ihl * 4;
+
+ ip_proto = iph->protocol;
+
+ if (dissector_uses_key(flow_dissector,
+ FLOW_DISSECTOR_KEY_IPV4_ADDRS)) {
+ key_addrs = skb_flow_dissector_target(flow_dissector,
+ FLOW_DISSECTOR_KEY_IPV4_ADDRS,
+ target_container);
+
+ memcpy(&key_addrs->v4addrs, &iph->saddr,
+ sizeof(key_addrs->v4addrs));
+ key_control->addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS;
+ }
+
+ if (ip_is_fragment(iph)) {
+ key_control->flags |= FLOW_DIS_IS_FRAGMENT;
+
+ if (iph->frag_off & htons(IP_OFFSET)) {
+ fdret = FLOW_DISSECT_RET_OUT_GOOD;
+ break;
+ } else {
+ key_control->flags |= FLOW_DIS_FIRST_FRAG;
+ if (!(flags &
+ FLOW_DISSECTOR_F_PARSE_1ST_FRAG)) {
+ fdret = FLOW_DISSECT_RET_OUT_GOOD;
+ break;
+ }
+ }
+ }
+
+ __skb_flow_dissect_ipv4(skb, flow_dissector,
+ target_container, data, iph);
+
+ if (flags & FLOW_DISSECTOR_F_STOP_AT_L3) {
+ fdret = FLOW_DISSECT_RET_OUT_GOOD;
+ break;
+ }
+
+ break;
+ }
+ case htons(ETH_P_IPV6): {
+ const struct ipv6hdr *iph;
+ struct ipv6hdr _iph;
+
+ iph = __skb_header_pointer(skb, nhoff, sizeof(_iph), data, hlen, &_iph);
+ if (!iph) {
+ fdret = FLOW_DISSECT_RET_OUT_BAD;
+ break;
+ }
+
+ ip_proto = iph->nexthdr;
+ nhoff += sizeof(struct ipv6hdr);
+
+ if (dissector_uses_key(flow_dissector,
+ FLOW_DISSECTOR_KEY_IPV6_ADDRS)) {
+ key_addrs = skb_flow_dissector_target(flow_dissector,
+ FLOW_DISSECTOR_KEY_IPV6_ADDRS,
+ target_container);
+
+ memcpy(&key_addrs->v6addrs, &iph->saddr,
+ sizeof(key_addrs->v6addrs));
+ key_control->addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS;
+ }
+
+ if ((dissector_uses_key(flow_dissector,
+ FLOW_DISSECTOR_KEY_FLOW_LABEL) ||
+ (flags & FLOW_DISSECTOR_F_STOP_AT_FLOW_LABEL)) &&
+ ip6_flowlabel(iph)) {
+ __be32 flow_label = ip6_flowlabel(iph);
+
+ if (dissector_uses_key(flow_dissector,
+ FLOW_DISSECTOR_KEY_FLOW_LABEL)) {
+ key_tags = skb_flow_dissector_target(flow_dissector,
+ FLOW_DISSECTOR_KEY_FLOW_LABEL,
+ target_container);
+ key_tags->flow_label = ntohl(flow_label);
+ }
+ if (flags & FLOW_DISSECTOR_F_STOP_AT_FLOW_LABEL) {
+ fdret = FLOW_DISSECT_RET_OUT_GOOD;
+ break;
+ }
+ }
+
+ __skb_flow_dissect_ipv6(skb, flow_dissector,
+ target_container, data, iph);
+
+ if (flags & FLOW_DISSECTOR_F_STOP_AT_L3)
+ fdret = FLOW_DISSECT_RET_OUT_GOOD;
+
+ break;
+ }
+ case htons(ETH_P_8021AD):
+ case htons(ETH_P_8021Q): {
+ const struct vlan_hdr *vlan;
+ struct vlan_hdr _vlan;
+ bool vlan_tag_present = skb && skb_vlan_tag_present(skb);
+
+ if (vlan_tag_present)
+ proto = skb->protocol;
+
+ if (!vlan_tag_present || eth_type_vlan_bp(skb->protocol)) {
+ vlan = __skb_header_pointer(skb, nhoff, sizeof(_vlan),
+ data, hlen, &_vlan);
+ if (!vlan) {
+ fdret = FLOW_DISSECT_RET_OUT_BAD;
+ break;
+ }
+
+ proto = vlan->h_vlan_encapsulated_proto;
+ nhoff += sizeof(*vlan);
+ if (skip_vlan) {
+ fdret = FLOW_DISSECT_RET_PROTO_AGAIN;
+ break;
+ }
+ }
+
+ skip_vlan = true;
+ if (dissector_uses_key(flow_dissector,
+ FLOW_DISSECTOR_KEY_VLAN)) {
+ key_vlan = skb_flow_dissector_target(flow_dissector,
+ FLOW_DISSECTOR_KEY_VLAN,
+ target_container);
+
+ if (vlan_tag_present) {
+ key_vlan->vlan_id = skb_vlan_tag_get_id(skb);
+ key_vlan->vlan_priority =
+ (skb_vlan_tag_get_prio(skb) >> VLAN_PRIO_SHIFT);
+ } else {
+ key_vlan->vlan_id = ntohs(vlan->h_vlan_TCI) &
+ VLAN_VID_MASK;
+ key_vlan->vlan_priority =
+ (ntohs(vlan->h_vlan_TCI) &
+ VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT;
+ }
+ }
+
+ fdret = FLOW_DISSECT_RET_PROTO_AGAIN;
+ break;
+ }
+ case htons(ETH_P_PPP_SES): {
+ struct {
+ struct pppoe_hdr hdr;
+ __be16 proto;
+ } *hdr, _hdr;
+ hdr = __skb_header_pointer(skb, nhoff, sizeof(_hdr), data, hlen, &_hdr);
+ if (!hdr) {
+ fdret = FLOW_DISSECT_RET_OUT_BAD;
+ break;
+ }
+
+ proto = hdr->proto;
+ nhoff += PPPOE_SES_HLEN;
+ switch (proto) {
+ case htons(PPP_IP):
+ proto = htons(ETH_P_IP);
+ fdret = FLOW_DISSECT_RET_PROTO_AGAIN;
+ break;
+ case htons(PPP_IPV6):
+ proto = htons(ETH_P_IPV6);
+ fdret = FLOW_DISSECT_RET_PROTO_AGAIN;
+ break;
+ default:
+ fdret = FLOW_DISSECT_RET_OUT_BAD;
+ break;
+ }
+ break;
+ }
+#ifdef __TIPC_SUPPORT__
+ case htons(ETH_P_TIPC): {
+ struct tipc_basic_hdr *hdr, _hdr;
+
+ hdr = __skb_header_pointer(skb, nhoff, sizeof(_hdr),
+ data, hlen, &_hdr);
+ if (!hdr) {
+ fdret = FLOW_DISSECT_RET_OUT_BAD;
+ break;
+ }
+
+ if (dissector_uses_key(flow_dissector,
+ FLOW_DISSECTOR_KEY_TIPC)) {
+ key_addrs = skb_flow_dissector_target(flow_dissector,
+ FLOW_DISSECTOR_KEY_TIPC,
+ target_container);
+ key_addrs->tipckey.key = tipc_hdr_rps_key(hdr);
+ key_control->addr_type = FLOW_DISSECTOR_KEY_TIPC;
+ }
+ fdret = FLOW_DISSECT_RET_OUT_GOOD;
+ break;
+ }
+#endif
+ case htons(ETH_P_MPLS_UC):
+ case htons(ETH_P_MPLS_MC):
+ fdret = __skb_flow_dissect_mpls(skb, flow_dissector,
+ target_container, data,
+ nhoff, hlen);
+ break;
+ case htons(ETH_P_FCOE):
+ if ((hlen - nhoff) < FCOE_HEADER_LEN) {
+ fdret = FLOW_DISSECT_RET_OUT_BAD;
+ break;
+ }
+
+ nhoff += FCOE_HEADER_LEN;
+ fdret = FLOW_DISSECT_RET_OUT_GOOD;
+ break;
+
+ case htons(ETH_P_ARP):
+ case htons(ETH_P_RARP):
+ fdret = __skb_flow_dissect_arp(skb, flow_dissector,
+ target_container, data,
+ nhoff, hlen);
+ break;
+
+ default:
+ fdret = FLOW_DISSECT_RET_OUT_BAD;
+ break;
+ }
+
+ /* Process result of proto processing */
+ switch (fdret) {
+ case FLOW_DISSECT_RET_OUT_GOOD:
+ goto out_good;
+ case FLOW_DISSECT_RET_PROTO_AGAIN:
+ if (skb_flow_dissect_allowed(&num_hdrs))
+ goto proto_again;
+ goto out_good;
+ case FLOW_DISSECT_RET_CONTINUE:
+ case FLOW_DISSECT_RET_IPPROTO_AGAIN:
+ break;
+ case FLOW_DISSECT_RET_OUT_BAD:
+ default:
+ goto out_bad;
+ }
+
+ip_proto_again:
+ fdret = FLOW_DISSECT_RET_CONTINUE;
+
+ switch (ip_proto) {
+#ifdef __GRE_SUPPORT__
+ case IPPROTO_GRE:
+ fdret = __skb_flow_dissect_gre(skb, key_control, flow_dissector,
+ target_container, data,
+ &proto, &nhoff, &hlen, flags);
+ break;
+#endif
+ case NEXTHDR_HOP:
+ case NEXTHDR_ROUTING:
+ case NEXTHDR_DEST: {
+ u8 _opthdr[2], *opthdr;
+
+ if (proto != htons(ETH_P_IPV6))
+ break;
+
+ opthdr = __skb_header_pointer(skb, nhoff, sizeof(_opthdr),
+ data, hlen, &_opthdr);
+ if (!opthdr) {
+ fdret = FLOW_DISSECT_RET_OUT_BAD;
+ break;
+ }
+
+ ip_proto = opthdr[0];
+ nhoff += (opthdr[1] + 1) << 3;
+
+ fdret = FLOW_DISSECT_RET_IPPROTO_AGAIN;
+ break;
+ }
+ case NEXTHDR_FRAGMENT: {
+ struct frag_hdr _fh, *fh;
+
+ if (proto != htons(ETH_P_IPV6))
+ break;
+
+ fh = __skb_header_pointer(skb, nhoff, sizeof(_fh),
+ data, hlen, &_fh);
+
+ if (!fh) {
+ fdret = FLOW_DISSECT_RET_OUT_BAD;
+ break;
+ }
+
+ key_control->flags |= FLOW_DIS_IS_FRAGMENT;
+
+ nhoff += sizeof(_fh);
+ ip_proto = fh->nexthdr;
+
+ if (!(fh->frag_off & htons(IP6_OFFSET))) {
+ key_control->flags |= FLOW_DIS_FIRST_FRAG;
+ if (flags & FLOW_DISSECTOR_F_PARSE_1ST_FRAG) {
+ fdret = FLOW_DISSECT_RET_IPPROTO_AGAIN;
+ break;
+ }
+ }
+
+ fdret = FLOW_DISSECT_RET_OUT_GOOD;
+ break;
+ }
+ case IPPROTO_IPIP:
+ proto = htons(ETH_P_IP);
+
+ key_control->flags |= FLOW_DIS_ENCAPSULATION;
+ if (flags & FLOW_DISSECTOR_F_STOP_AT_ENCAP) {
+ fdret = FLOW_DISSECT_RET_OUT_GOOD;
+ break;
+ }
+
+ fdret = FLOW_DISSECT_RET_PROTO_AGAIN;
+ break;
+
+ case IPPROTO_IPV6:
+ proto = htons(ETH_P_IPV6);
+
+ key_control->flags |= FLOW_DIS_ENCAPSULATION;
+ if (flags & FLOW_DISSECTOR_F_STOP_AT_ENCAP) {
+ fdret = FLOW_DISSECT_RET_OUT_GOOD;
+ break;
+ }
+
+ fdret = FLOW_DISSECT_RET_PROTO_AGAIN;
+ break;
+
+
+ case IPPROTO_MPLS:
+ proto = htons(ETH_P_MPLS_UC);
+ fdret = FLOW_DISSECT_RET_PROTO_AGAIN;
+ break;
+
+ case IPPROTO_TCP:
+ __skb_flow_dissect_tcp(skb, flow_dissector, target_container,
+ data, nhoff, hlen);
+ break;
+
+ default:
+ break;
+ }
+
+ if (dissector_uses_key(flow_dissector,
+ FLOW_DISSECTOR_KEY_PORTS)) {
+ key_ports = skb_flow_dissector_target(flow_dissector,
+ FLOW_DISSECTOR_KEY_PORTS,
+ target_container);
+ key_ports->ports = __skb_flow_get_ports(skb, nhoff, ip_proto,
+ data, hlen);
+ }
+
+ if (dissector_uses_key(flow_dissector,
+ FLOW_DISSECTOR_KEY_ICMP)) {
+ key_icmp = skb_flow_dissector_target(flow_dissector,
+ FLOW_DISSECTOR_KEY_ICMP,
+ target_container);
+ key_icmp->icmp = skb_flow_get_be16(skb, nhoff, data, hlen);
+ }
+
+ /* Process result of IP proto processing */
+ switch (fdret) {
+ case FLOW_DISSECT_RET_PROTO_AGAIN:
+ if (skb_flow_dissect_allowed(&num_hdrs))
+ goto proto_again;
+ break;
+ case FLOW_DISSECT_RET_IPPROTO_AGAIN:
+ if (skb_flow_dissect_allowed(&num_hdrs))
+ goto ip_proto_again;
+ break;
+ case FLOW_DISSECT_RET_OUT_GOOD:
+ case FLOW_DISSECT_RET_CONTINUE:
+ break;
+ case FLOW_DISSECT_RET_OUT_BAD:
+ default:
+ goto out_bad;
+ }
+
+out_good:
+ ret = true;
+
+out:
+ key_control->thoff = min_t(u16, nhoff, skb ? skb->len : hlen);
+ key_basic->n_proto = proto;
+ key_basic->ip_proto = ip_proto;
+
+ return ret;
+
+out_bad:
+ ret = false;
+ goto out;
+}
+EXPORT_SYMBOL(__skb_flow_dissect);
+#endif /* HAVE_SKB_FLOW_DISSECT */
+
+static u32 hashrnd __read_mostly;
+static __always_inline void __flow_hash_secret_init(void)
+{
+ net_get_random_once(&hashrnd, sizeof(hashrnd));
+}
+
+static __always_inline u32 __flow_hash_words(const u32 *words, u32 length,
+ u32 keyval)
+{
+ return jhash2(words, length, keyval);
+}
+
+static inline const u32 *flow_keys_hash_start(const struct flow_keys *flow)
+{
+ const void *p = flow;
+
+ BUILD_BUG_ON(FLOW_KEYS_HASH_OFFSET % sizeof(u32));
+ return (const u32 *)(p + FLOW_KEYS_HASH_OFFSET);
+}
+
+static inline size_t flow_keys_hash_length(const struct flow_keys *flow)
+{
+ size_t diff = FLOW_KEYS_HASH_OFFSET + sizeof(flow->addrs);
+ BUILD_BUG_ON((sizeof(*flow) - FLOW_KEYS_HASH_OFFSET) % sizeof(u32));
+ BUILD_BUG_ON(offsetof(typeof(*flow), addrs) !=
+ sizeof(*flow) - sizeof(flow->addrs));
+
+ switch (flow->control.addr_type) {
+ case FLOW_DISSECTOR_KEY_IPV4_ADDRS:
+ diff -= sizeof(flow->addrs.v4addrs);
+ break;
+ case FLOW_DISSECTOR_KEY_IPV6_ADDRS:
+ diff -= sizeof(flow->addrs.v6addrs);
+ break;
+#ifdef __TIPC_SUPPORT__
+ case FLOW_DISSECTOR_KEY_TIPC:
+ diff -= sizeof(flow->addrs.tipckey);
+ break;
+#endif
+ }
+ return (sizeof(*flow) - diff) / sizeof(u32);
+}
+
+__be32 flow_get_u32_src(const struct flow_keys *flow)
+{
+ switch (flow->control.addr_type) {
+ case FLOW_DISSECTOR_KEY_IPV4_ADDRS:
+ return flow->addrs.v4addrs.src;
+ case FLOW_DISSECTOR_KEY_IPV6_ADDRS:
+ return (__force __be32)ipv6_addr_hash(
+ &flow->addrs.v6addrs.src);
+#ifdef __TIPC_SUPPORT__
+ case FLOW_DISSECTOR_KEY_TIPC:
+ return flow->addrs.tipckey.key;
+#endif
+ default:
+ return 0;
+ }
+}
+EXPORT_SYMBOL(flow_get_u32_src);
+
+__be32 flow_get_u32_dst(const struct flow_keys *flow)
+{
+ switch (flow->control.addr_type) {
+ case FLOW_DISSECTOR_KEY_IPV4_ADDRS:
+ return flow->addrs.v4addrs.dst;
+ case FLOW_DISSECTOR_KEY_IPV6_ADDRS:
+ return (__force __be32)ipv6_addr_hash(
+ &flow->addrs.v6addrs.dst);
+ default:
+ return 0;
+ }
+}
+EXPORT_SYMBOL(flow_get_u32_dst);
+
+static inline void __flow_hash_consistentify(struct flow_keys *keys)
+{
+ int addr_diff, i;
+
+ switch (keys->control.addr_type) {
+ case FLOW_DISSECTOR_KEY_IPV4_ADDRS:
+ addr_diff = (__force u32)keys->addrs.v4addrs.dst -
+ (__force u32)keys->addrs.v4addrs.src;
+ if ((addr_diff < 0) ||
+ (addr_diff == 0 &&
+ ((__force u16)keys->ports.dst <
+ (__force u16)keys->ports.src))) {
+ swap(keys->addrs.v4addrs.src, keys->addrs.v4addrs.dst);
+ swap(keys->ports.src, keys->ports.dst);
+ }
+ break;
+ case FLOW_DISSECTOR_KEY_IPV6_ADDRS:
+ addr_diff = memcmp(&keys->addrs.v6addrs.dst,
+ &keys->addrs.v6addrs.src,
+ sizeof(keys->addrs.v6addrs.dst));
+ if ((addr_diff < 0) ||
+ (addr_diff == 0 &&
+ ((__force u16)keys->ports.dst <
+ (__force u16)keys->ports.src))) {
+ for (i = 0; i < 4; i++)
+ swap(keys->addrs.v6addrs.src.s6_addr32[i],
+ keys->addrs.v6addrs.dst.s6_addr32[i]);
+ swap(keys->ports.src, keys->ports.dst);
+ }
+ break;
+ }
+}
+
+static inline u32 __flow_hash_from_keys(struct flow_keys *keys, u32 keyval)
+{
+ u32 hash;
+
+ __flow_hash_consistentify(keys);
+
+ hash = __flow_hash_words(flow_keys_hash_start(keys),
+ flow_keys_hash_length(keys), keyval);
+ if (!hash)
+ hash = 1;
+
+ return hash;
+}
+
+u32 flow_hash_from_keys(struct flow_keys *keys)
+{
+ __flow_hash_secret_init();
+ return __flow_hash_from_keys(keys, hashrnd);
+}
+EXPORT_SYMBOL(flow_hash_from_keys);
+
+static inline u32 ___skb_get_hash(const struct sk_buff *skb,
+ struct flow_keys *keys, u32 keyval)
+{
+ skb_flow_dissect_flow_keys(skb, keys,
+ FLOW_DISSECTOR_F_STOP_AT_FLOW_LABEL);
+
+ return __flow_hash_from_keys(keys, keyval);
+}
+
+struct _flow_keys_digest_data {
+ __be16 n_proto;
+ u8 ip_proto;
+ u8 padding;
+ __be32 ports;
+ __be32 src;
+ __be32 dst;
+};
+
+void make_flow_keys_digest(struct flow_keys_digest *digest,
+ const struct flow_keys *flow)
+{
+ struct _flow_keys_digest_data *data =
+ (struct _flow_keys_digest_data *)digest;
+
+ BUILD_BUG_ON(sizeof(*data) > sizeof(*digest));
+
+ memset(digest, 0, sizeof(*digest));
+
+ data->n_proto = flow->basic.n_proto;
+ data->ip_proto = flow->basic.ip_proto;
+ data->ports = flow->ports.ports;
+ data->src = flow->addrs.v4addrs.src;
+ data->dst = flow->addrs.v4addrs.dst;
+}
+EXPORT_SYMBOL(make_flow_keys_digest);
+
+static struct flow_dissector flow_keys_dissector_symmetric __read_mostly;
+
+#ifndef CONFIG_NET_SCHED_NEW
+u32 __skb_get_hash_symmetric(const struct sk_buff *skb)
+{
+ struct flow_keys keys;
+
+ __flow_hash_secret_init();
+
+ memset(&keys, 0, sizeof(keys));
+ __skb_flow_dissect(skb, &flow_keys_dissector_symmetric, &keys,
+ NULL, 0, 0, 0,
+ FLOW_DISSECTOR_F_STOP_AT_FLOW_LABEL);
+
+ return __flow_hash_from_keys(&keys, hashrnd);
+}
+EXPORT_SYMBOL_GPL(__skb_get_hash_symmetric);
+
+/**
+ * __skb_get_hash: calculate a flow hash
+ * @skb: sk_buff to calculate flow hash from
+ *
+ * This function calculates a flow hash based on src/dst addresses
+ * and src/dst port numbers. Sets hash in skb to non-zero hash value
+ * on success, zero indicates no valid hash. Also, sets l4_hash in skb
+ * if hash is a canonical 4-tuple hash over transport ports.
+ */
+void __skb_get_hash(struct sk_buff *skb)
+{
+ struct flow_keys keys;
+ u32 hash;
+
+ __flow_hash_secret_init();
+
+ hash = ___skb_get_hash(skb, &keys, hashrnd);
+
+#ifdef HAVE_SKB_SWHASH
+ __skb_set_sw_hash(skb, hash, flow_keys_have_l4(&keys));
+#else
+ skb->l4_hash = flow_keys_have_l4(&keys);
+ skb->hash = hash;
+#endif
+}
+EXPORT_SYMBOL(__skb_get_hash);
+
+__u32 __get_hash_from_flowi6(const struct flowi6 *fl6, struct flow_keys *keys)
+{
+ memset(keys, 0, sizeof(*keys));
+
+ memcpy(&keys->addrs.v6addrs.src, &fl6->saddr,
+ sizeof(keys->addrs.v6addrs.src));
+ memcpy(&keys->addrs.v6addrs.dst, &fl6->daddr,
+ sizeof(keys->addrs.v6addrs.dst));
+ keys->control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS;
+ keys->ports.src = fl6->fl6_sport;
+ keys->ports.dst = fl6->fl6_dport;
+ keys->keyid.keyid = fl6->fl6_gre_key;
+ keys->tags.flow_label = (__force u32)fl6->flowlabel;
+ keys->basic.ip_proto = fl6->flowi6_proto;
+
+ return flow_hash_from_keys(keys);
+}
+EXPORT_SYMBOL(__get_hash_from_flowi6);
+
+__u32 __get_hash_from_flowi4(const struct flowi4 *fl4, struct flow_keys *keys)
+{
+ memset(keys, 0, sizeof(*keys));
+
+ keys->addrs.v4addrs.src = fl4->saddr;
+ keys->addrs.v4addrs.dst = fl4->daddr;
+ keys->control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS;
+ keys->ports.src = fl4->fl4_sport;
+ keys->ports.dst = fl4->fl4_dport;
+ keys->keyid.keyid = fl4->fl4_gre_key;
+ keys->basic.ip_proto = fl4->flowi4_proto;
+
+ return flow_hash_from_keys(keys);
+}
+EXPORT_SYMBOL(__get_hash_from_flowi4);
+
+__u32 skb_get_hash_perturb(const struct sk_buff *skb, u32 perturb)
+{
+ struct flow_keys keys;
+
+ return ___skb_get_hash(skb, &keys, perturb);
+}
+EXPORT_SYMBOL(skb_get_hash_perturb);
+#endif
+
+#ifndef HAVE_SKB_FLOW_DISSECT
+u32 __skb_get_poff(const struct sk_buff *skb, void *data,
+ const struct flow_keys *keys, int hlen)
+{
+ u32 poff = keys->control.thoff;
+
+ /* skip L4 headers for fragments after the first */
+ if ((keys->control.flags & FLOW_DIS_IS_FRAGMENT) &&
+ !(keys->control.flags & FLOW_DIS_FIRST_FRAG))
+ return poff;
+
+ switch (keys->basic.ip_proto) {
+ case IPPROTO_TCP: {
+ /* access doff as u8 to avoid unaligned access */
+ const u8 *doff;
+ u8 _doff;
+
+ doff = __skb_header_pointer(skb, poff + 12, sizeof(_doff),
+ data, hlen, &_doff);
+ if (!doff)
+ return poff;
+
+ poff += max_t(u32, sizeof(struct tcphdr), (*doff & 0xF0) >> 2);
+ break;
+ }
+ case IPPROTO_UDP:
+ case IPPROTO_UDPLITE:
+ poff += sizeof(struct udphdr);
+ break;
+ /* For the rest, we do not really care about header
+ * extensions at this point for now.
+ */
+ case IPPROTO_ICMP:
+ poff += sizeof(struct icmphdr);
+ break;
+ case IPPROTO_ICMPV6:
+ poff += sizeof(struct icmp6hdr);
+ break;
+ case IPPROTO_IGMP:
+ poff += sizeof(struct igmphdr);
+ break;
+ case IPPROTO_DCCP:
+ poff += sizeof(struct dccp_hdr);
+ break;
+ case IPPROTO_SCTP:
+ poff += sizeof(struct sctphdr);
+ break;
+ }
+
+ return poff;
+}
+
+/**
+ * skb_get_poff - get the offset to the payload
+ * @skb: sk_buff to get the payload offset from
+ *
+ * The function will get the offset to the payload as far as it could
+ * be dissected. The main user is currently BPF, so that we can dynamically
+ * truncate packets without needing to push actual payload to the user
+ * space and can analyze headers only, instead.
+ */
+u32 skb_get_poff(const struct sk_buff *skb)
+{
+ struct flow_keys keys;
+
+ if (!skb_flow_dissect_flow_keys(skb, &keys, 0))
+ return 0;
+
+ return __skb_get_poff(skb, skb->data, &keys, skb_headlen(skb));
+}
+#endif
+
+static const struct flow_dissector_key flow_keys_dissector_keys[] = {
+ {
+ .key_id = FLOW_DISSECTOR_KEY_CONTROL,
+ .offset = offsetof(struct flow_keys, control),
+ },
+ {
+ .key_id = FLOW_DISSECTOR_KEY_BASIC,
+ .offset = offsetof(struct flow_keys, basic),
+ },
+ {
+ .key_id = FLOW_DISSECTOR_KEY_IPV4_ADDRS,
+ .offset = offsetof(struct flow_keys, addrs.v4addrs),
+ },
+ {
+ .key_id = FLOW_DISSECTOR_KEY_IPV6_ADDRS,
+ .offset = offsetof(struct flow_keys, addrs.v6addrs),
+ },
+#ifdef __TIPC_SUPPORT__
+ {
+ .key_id = FLOW_DISSECTOR_KEY_TIPC,
+ .offset = offsetof(struct flow_keys, addrs.tipckey),
+ },
+#endif
+ {
+ .key_id = FLOW_DISSECTOR_KEY_PORTS,
+ .offset = offsetof(struct flow_keys, ports),
+ },
+ {
+ .key_id = FLOW_DISSECTOR_KEY_VLAN,
+ .offset = offsetof(struct flow_keys, vlan),
+ },
+ {
+ .key_id = FLOW_DISSECTOR_KEY_FLOW_LABEL,
+ .offset = offsetof(struct flow_keys, tags),
+ },
+#ifdef __GRE_SUPPORT__
+ {
+ .key_id = FLOW_DISSECTOR_KEY_GRE_KEYID,
+ .offset = offsetof(struct flow_keys, keyid),
+ },
+#endif
+};
+
+static const struct flow_dissector_key flow_keys_dissector_symmetric_keys[] = {
+ {
+ .key_id = FLOW_DISSECTOR_KEY_CONTROL,
+ .offset = offsetof(struct flow_keys, control),
+ },
+ {
+ .key_id = FLOW_DISSECTOR_KEY_BASIC,
+ .offset = offsetof(struct flow_keys, basic),
+ },
+ {
+ .key_id = FLOW_DISSECTOR_KEY_IPV4_ADDRS,
+ .offset = offsetof(struct flow_keys, addrs.v4addrs),
+ },
+ {
+ .key_id = FLOW_DISSECTOR_KEY_IPV6_ADDRS,
+ .offset = offsetof(struct flow_keys, addrs.v6addrs),
+ },
+ {
+ .key_id = FLOW_DISSECTOR_KEY_PORTS,
+ .offset = offsetof(struct flow_keys, ports),
+ },
+};
+
+static const struct flow_dissector_key flow_keys_buf_dissector_keys[] = {
+ {
+ .key_id = FLOW_DISSECTOR_KEY_CONTROL,
+ .offset = offsetof(struct flow_keys, control),
+ },
+ {
+ .key_id = FLOW_DISSECTOR_KEY_BASIC,
+ .offset = offsetof(struct flow_keys, basic),
+ },
+};
+
+struct flow_dissector flow_keys_dissector __read_mostly;
+EXPORT_SYMBOL(flow_keys_dissector);
+
+struct flow_dissector flow_keys_buf_dissector __read_mostly;
+
+int init_default_flow_dissectors(void)
+{
+ skb_flow_dissector_init(&flow_keys_dissector,
+ flow_keys_dissector_keys,
+ ARRAY_SIZE(flow_keys_dissector_keys));
+ skb_flow_dissector_init(&flow_keys_dissector_symmetric,
+ flow_keys_dissector_symmetric_keys,
+ ARRAY_SIZE(flow_keys_dissector_symmetric_keys));
+ skb_flow_dissector_init(&flow_keys_buf_dissector,
+ flow_keys_buf_dissector_keys,
+ ARRAY_SIZE(flow_keys_buf_dissector_keys));
+ return 0;
+}
+
+#endif /* CONFIG_COMPAT_FLOW_DISSECTOR */
projects / compat-rdma / compat.git / commitdiff