mirror of https://github.com/torvalds/linux.git
855 lines
20 KiB
C
855 lines
20 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#define _GNU_SOURCE
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#include <test_progs.h>
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#include <network_helpers.h>
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#include <linux/if_tun.h>
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#include <sys/uio.h>
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#include "bpf_flow.skel.h"
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#define TEST_NS "flow_dissector_ns"
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#define FLOW_CONTINUE_SADDR 0x7f00007f /* 127.0.0.127 */
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#define TEST_NAME_MAX_LEN 64
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#ifndef IP_MF
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#define IP_MF 0x2000
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#endif
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struct ipv4_pkt {
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struct ethhdr eth;
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struct iphdr iph;
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struct tcphdr tcp;
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} __packed;
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struct ipip_pkt {
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struct ethhdr eth;
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struct iphdr iph;
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struct iphdr iph_inner;
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struct tcphdr tcp;
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} __packed;
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struct svlan_ipv4_pkt {
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struct ethhdr eth;
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__u16 vlan_tci;
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__u16 vlan_proto;
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struct iphdr iph;
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struct tcphdr tcp;
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} __packed;
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struct ipv6_pkt {
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struct ethhdr eth;
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struct ipv6hdr iph;
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struct tcphdr tcp;
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} __packed;
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struct ipv6_frag_pkt {
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struct ethhdr eth;
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struct ipv6hdr iph;
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struct frag_hdr {
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__u8 nexthdr;
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__u8 reserved;
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__be16 frag_off;
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__be32 identification;
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} ipf;
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struct tcphdr tcp;
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} __packed;
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struct dvlan_ipv6_pkt {
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struct ethhdr eth;
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__u16 vlan_tci;
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__u16 vlan_proto;
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__u16 vlan_tci2;
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__u16 vlan_proto2;
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struct ipv6hdr iph;
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struct tcphdr tcp;
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} __packed;
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struct gre_base_hdr {
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__be16 flags;
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__be16 protocol;
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} gre_base_hdr;
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struct gre_minimal_pkt {
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struct ethhdr eth;
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struct iphdr iph;
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struct gre_base_hdr gre_hdr;
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struct iphdr iph_inner;
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struct tcphdr tcp;
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} __packed;
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struct test {
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const char *name;
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union {
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struct ipv4_pkt ipv4;
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struct svlan_ipv4_pkt svlan_ipv4;
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struct ipip_pkt ipip;
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struct ipv6_pkt ipv6;
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struct ipv6_frag_pkt ipv6_frag;
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struct dvlan_ipv6_pkt dvlan_ipv6;
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struct gre_minimal_pkt gre_minimal;
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} pkt;
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struct bpf_flow_keys keys;
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__u32 flags;
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__u32 retval;
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};
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#define VLAN_HLEN 4
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struct test tests[] = {
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{
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.name = "ipv4",
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.pkt.ipv4 = {
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.eth.h_proto = __bpf_constant_htons(ETH_P_IP),
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.iph.ihl = 5,
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.iph.protocol = IPPROTO_TCP,
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.iph.tot_len = __bpf_constant_htons(MAGIC_BYTES),
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.tcp.doff = 5,
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.tcp.source = 80,
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.tcp.dest = 8080,
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},
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.keys = {
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.nhoff = ETH_HLEN,
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.thoff = ETH_HLEN + sizeof(struct iphdr),
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.addr_proto = ETH_P_IP,
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.ip_proto = IPPROTO_TCP,
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.n_proto = __bpf_constant_htons(ETH_P_IP),
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.sport = 80,
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.dport = 8080,
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},
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.retval = BPF_OK,
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},
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{
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.name = "ipv6",
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.pkt.ipv6 = {
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.eth.h_proto = __bpf_constant_htons(ETH_P_IPV6),
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.iph.nexthdr = IPPROTO_TCP,
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.iph.payload_len = __bpf_constant_htons(MAGIC_BYTES),
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.tcp.doff = 5,
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.tcp.source = 80,
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.tcp.dest = 8080,
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},
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.keys = {
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.nhoff = ETH_HLEN,
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.thoff = ETH_HLEN + sizeof(struct ipv6hdr),
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.addr_proto = ETH_P_IPV6,
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.ip_proto = IPPROTO_TCP,
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.n_proto = __bpf_constant_htons(ETH_P_IPV6),
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.sport = 80,
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.dport = 8080,
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},
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.retval = BPF_OK,
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},
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{
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.name = "802.1q-ipv4",
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.pkt.svlan_ipv4 = {
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.eth.h_proto = __bpf_constant_htons(ETH_P_8021Q),
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.vlan_proto = __bpf_constant_htons(ETH_P_IP),
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.iph.ihl = 5,
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.iph.protocol = IPPROTO_TCP,
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.iph.tot_len = __bpf_constant_htons(MAGIC_BYTES),
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.tcp.doff = 5,
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.tcp.source = 80,
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.tcp.dest = 8080,
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},
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.keys = {
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.nhoff = ETH_HLEN + VLAN_HLEN,
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.thoff = ETH_HLEN + VLAN_HLEN + sizeof(struct iphdr),
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.addr_proto = ETH_P_IP,
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.ip_proto = IPPROTO_TCP,
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.n_proto = __bpf_constant_htons(ETH_P_IP),
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.sport = 80,
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.dport = 8080,
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},
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.retval = BPF_OK,
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},
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{
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.name = "802.1ad-ipv6",
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.pkt.dvlan_ipv6 = {
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.eth.h_proto = __bpf_constant_htons(ETH_P_8021AD),
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.vlan_proto = __bpf_constant_htons(ETH_P_8021Q),
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.vlan_proto2 = __bpf_constant_htons(ETH_P_IPV6),
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.iph.nexthdr = IPPROTO_TCP,
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.iph.payload_len = __bpf_constant_htons(MAGIC_BYTES),
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.tcp.doff = 5,
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.tcp.source = 80,
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.tcp.dest = 8080,
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},
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.keys = {
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.nhoff = ETH_HLEN + VLAN_HLEN * 2,
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.thoff = ETH_HLEN + VLAN_HLEN * 2 +
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sizeof(struct ipv6hdr),
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.addr_proto = ETH_P_IPV6,
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.ip_proto = IPPROTO_TCP,
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.n_proto = __bpf_constant_htons(ETH_P_IPV6),
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.sport = 80,
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.dport = 8080,
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},
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.retval = BPF_OK,
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},
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{
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.name = "ipv4-frag",
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.pkt.ipv4 = {
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.eth.h_proto = __bpf_constant_htons(ETH_P_IP),
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.iph.ihl = 5,
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.iph.protocol = IPPROTO_TCP,
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.iph.tot_len = __bpf_constant_htons(MAGIC_BYTES),
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.iph.frag_off = __bpf_constant_htons(IP_MF),
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.tcp.doff = 5,
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.tcp.source = 80,
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.tcp.dest = 8080,
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},
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.keys = {
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.flags = BPF_FLOW_DISSECTOR_F_PARSE_1ST_FRAG,
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.nhoff = ETH_HLEN,
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.thoff = ETH_HLEN + sizeof(struct iphdr),
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.addr_proto = ETH_P_IP,
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.ip_proto = IPPROTO_TCP,
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.n_proto = __bpf_constant_htons(ETH_P_IP),
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.is_frag = true,
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.is_first_frag = true,
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.sport = 80,
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.dport = 8080,
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},
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.flags = BPF_FLOW_DISSECTOR_F_PARSE_1ST_FRAG,
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.retval = BPF_OK,
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},
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{
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.name = "ipv4-no-frag",
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.pkt.ipv4 = {
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.eth.h_proto = __bpf_constant_htons(ETH_P_IP),
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.iph.ihl = 5,
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.iph.protocol = IPPROTO_TCP,
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.iph.tot_len = __bpf_constant_htons(MAGIC_BYTES),
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.iph.frag_off = __bpf_constant_htons(IP_MF),
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.tcp.doff = 5,
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.tcp.source = 80,
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.tcp.dest = 8080,
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},
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.keys = {
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.nhoff = ETH_HLEN,
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.thoff = ETH_HLEN + sizeof(struct iphdr),
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.addr_proto = ETH_P_IP,
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.ip_proto = IPPROTO_TCP,
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.n_proto = __bpf_constant_htons(ETH_P_IP),
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.is_frag = true,
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.is_first_frag = true,
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},
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.retval = BPF_OK,
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},
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{
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.name = "ipv6-frag",
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.pkt.ipv6_frag = {
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.eth.h_proto = __bpf_constant_htons(ETH_P_IPV6),
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.iph.nexthdr = IPPROTO_FRAGMENT,
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.iph.payload_len = __bpf_constant_htons(MAGIC_BYTES),
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.ipf.nexthdr = IPPROTO_TCP,
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.tcp.doff = 5,
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.tcp.source = 80,
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.tcp.dest = 8080,
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},
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.keys = {
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.flags = BPF_FLOW_DISSECTOR_F_PARSE_1ST_FRAG,
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.nhoff = ETH_HLEN,
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.thoff = ETH_HLEN + sizeof(struct ipv6hdr) +
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sizeof(struct frag_hdr),
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.addr_proto = ETH_P_IPV6,
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.ip_proto = IPPROTO_TCP,
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.n_proto = __bpf_constant_htons(ETH_P_IPV6),
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.is_frag = true,
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.is_first_frag = true,
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.sport = 80,
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.dport = 8080,
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},
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.flags = BPF_FLOW_DISSECTOR_F_PARSE_1ST_FRAG,
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.retval = BPF_OK,
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},
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{
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.name = "ipv6-no-frag",
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.pkt.ipv6_frag = {
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.eth.h_proto = __bpf_constant_htons(ETH_P_IPV6),
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.iph.nexthdr = IPPROTO_FRAGMENT,
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.iph.payload_len = __bpf_constant_htons(MAGIC_BYTES),
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.ipf.nexthdr = IPPROTO_TCP,
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.tcp.doff = 5,
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.tcp.source = 80,
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.tcp.dest = 8080,
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},
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.keys = {
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.nhoff = ETH_HLEN,
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.thoff = ETH_HLEN + sizeof(struct ipv6hdr) +
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sizeof(struct frag_hdr),
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.addr_proto = ETH_P_IPV6,
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.ip_proto = IPPROTO_TCP,
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.n_proto = __bpf_constant_htons(ETH_P_IPV6),
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.is_frag = true,
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.is_first_frag = true,
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},
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.retval = BPF_OK,
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},
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{
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.name = "ipv6-flow-label",
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.pkt.ipv6 = {
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.eth.h_proto = __bpf_constant_htons(ETH_P_IPV6),
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.iph.nexthdr = IPPROTO_TCP,
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.iph.payload_len = __bpf_constant_htons(MAGIC_BYTES),
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.iph.flow_lbl = { 0xb, 0xee, 0xef },
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.tcp.doff = 5,
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.tcp.source = 80,
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.tcp.dest = 8080,
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},
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.keys = {
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.nhoff = ETH_HLEN,
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.thoff = ETH_HLEN + sizeof(struct ipv6hdr),
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.addr_proto = ETH_P_IPV6,
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.ip_proto = IPPROTO_TCP,
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.n_proto = __bpf_constant_htons(ETH_P_IPV6),
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.sport = 80,
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.dport = 8080,
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.flow_label = __bpf_constant_htonl(0xbeeef),
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},
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.retval = BPF_OK,
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},
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{
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.name = "ipv6-no-flow-label",
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.pkt.ipv6 = {
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.eth.h_proto = __bpf_constant_htons(ETH_P_IPV6),
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.iph.nexthdr = IPPROTO_TCP,
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.iph.payload_len = __bpf_constant_htons(MAGIC_BYTES),
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.iph.flow_lbl = { 0xb, 0xee, 0xef },
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.tcp.doff = 5,
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.tcp.source = 80,
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.tcp.dest = 8080,
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},
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.keys = {
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.flags = BPF_FLOW_DISSECTOR_F_STOP_AT_FLOW_LABEL,
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.nhoff = ETH_HLEN,
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.thoff = ETH_HLEN + sizeof(struct ipv6hdr),
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.addr_proto = ETH_P_IPV6,
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.ip_proto = IPPROTO_TCP,
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.n_proto = __bpf_constant_htons(ETH_P_IPV6),
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.flow_label = __bpf_constant_htonl(0xbeeef),
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},
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.flags = BPF_FLOW_DISSECTOR_F_STOP_AT_FLOW_LABEL,
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.retval = BPF_OK,
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},
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{
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.name = "ipv6-empty-flow-label",
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.pkt.ipv6 = {
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.eth.h_proto = __bpf_constant_htons(ETH_P_IPV6),
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.iph.nexthdr = IPPROTO_TCP,
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.iph.payload_len = __bpf_constant_htons(MAGIC_BYTES),
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.iph.flow_lbl = { 0x00, 0x00, 0x00 },
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.tcp.doff = 5,
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.tcp.source = 80,
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.tcp.dest = 8080,
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},
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.keys = {
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.flags = BPF_FLOW_DISSECTOR_F_STOP_AT_FLOW_LABEL,
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.nhoff = ETH_HLEN,
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.thoff = ETH_HLEN + sizeof(struct ipv6hdr),
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.addr_proto = ETH_P_IPV6,
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.ip_proto = IPPROTO_TCP,
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.n_proto = __bpf_constant_htons(ETH_P_IPV6),
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.sport = 80,
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.dport = 8080,
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},
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.flags = BPF_FLOW_DISSECTOR_F_STOP_AT_FLOW_LABEL,
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.retval = BPF_OK,
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},
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{
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.name = "ipip-encap",
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.pkt.ipip = {
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.eth.h_proto = __bpf_constant_htons(ETH_P_IP),
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.iph.ihl = 5,
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.iph.protocol = IPPROTO_IPIP,
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.iph.tot_len = __bpf_constant_htons(MAGIC_BYTES),
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.iph_inner.ihl = 5,
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.iph_inner.protocol = IPPROTO_TCP,
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.iph_inner.tot_len =
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__bpf_constant_htons(MAGIC_BYTES -
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sizeof(struct iphdr)),
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.tcp.doff = 5,
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.tcp.source = 80,
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.tcp.dest = 8080,
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},
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.keys = {
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.nhoff = ETH_HLEN,
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.thoff = ETH_HLEN + sizeof(struct iphdr) +
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sizeof(struct iphdr),
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.addr_proto = ETH_P_IP,
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.ip_proto = IPPROTO_TCP,
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.n_proto = __bpf_constant_htons(ETH_P_IP),
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.is_encap = true,
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.sport = 80,
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.dport = 8080,
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},
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.retval = BPF_OK,
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},
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{
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.name = "ipip-no-encap",
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.pkt.ipip = {
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.eth.h_proto = __bpf_constant_htons(ETH_P_IP),
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.iph.ihl = 5,
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.iph.protocol = IPPROTO_IPIP,
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.iph.tot_len = __bpf_constant_htons(MAGIC_BYTES),
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.iph_inner.ihl = 5,
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.iph_inner.protocol = IPPROTO_TCP,
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.iph_inner.tot_len =
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__bpf_constant_htons(MAGIC_BYTES -
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sizeof(struct iphdr)),
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.tcp.doff = 5,
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.tcp.source = 80,
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.tcp.dest = 8080,
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},
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.keys = {
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.flags = BPF_FLOW_DISSECTOR_F_STOP_AT_ENCAP,
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.nhoff = ETH_HLEN,
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.thoff = ETH_HLEN + sizeof(struct iphdr),
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.addr_proto = ETH_P_IP,
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.ip_proto = IPPROTO_IPIP,
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.n_proto = __bpf_constant_htons(ETH_P_IP),
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.is_encap = true,
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},
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.flags = BPF_FLOW_DISSECTOR_F_STOP_AT_ENCAP,
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.retval = BPF_OK,
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},
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{
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.name = "ipip-encap-dissector-continue",
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.pkt.ipip = {
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.eth.h_proto = __bpf_constant_htons(ETH_P_IP),
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.iph.ihl = 5,
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.iph.protocol = IPPROTO_IPIP,
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.iph.tot_len = __bpf_constant_htons(MAGIC_BYTES),
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.iph.saddr = __bpf_constant_htonl(FLOW_CONTINUE_SADDR),
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.iph_inner.ihl = 5,
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.iph_inner.protocol = IPPROTO_TCP,
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.iph_inner.tot_len =
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__bpf_constant_htons(MAGIC_BYTES -
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sizeof(struct iphdr)),
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.tcp.doff = 5,
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.tcp.source = 99,
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.tcp.dest = 9090,
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},
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.retval = BPF_FLOW_DISSECTOR_CONTINUE,
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},
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{
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.name = "ip-gre",
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.pkt.gre_minimal = {
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.eth.h_proto = __bpf_constant_htons(ETH_P_IP),
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.iph.ihl = 5,
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.iph.protocol = IPPROTO_GRE,
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.iph.tot_len = __bpf_constant_htons(MAGIC_BYTES),
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.gre_hdr = {
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.flags = 0,
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.protocol = __bpf_constant_htons(ETH_P_IP),
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},
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.iph_inner.ihl = 5,
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.iph_inner.protocol = IPPROTO_TCP,
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.iph_inner.tot_len =
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__bpf_constant_htons(MAGIC_BYTES -
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sizeof(struct iphdr)),
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.tcp.doff = 5,
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.tcp.source = 80,
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.tcp.dest = 8080,
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},
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.keys = {
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.nhoff = ETH_HLEN,
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.thoff = ETH_HLEN + sizeof(struct iphdr) * 2 +
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sizeof(struct gre_base_hdr),
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.addr_proto = ETH_P_IP,
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.ip_proto = IPPROTO_TCP,
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.n_proto = __bpf_constant_htons(ETH_P_IP),
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.is_encap = true,
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.sport = 80,
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.dport = 8080,
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},
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.retval = BPF_OK,
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},
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{
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.name = "ip-gre-no-encap",
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|
.pkt.ipip = {
|
|
.eth.h_proto = __bpf_constant_htons(ETH_P_IP),
|
|
.iph.ihl = 5,
|
|
.iph.protocol = IPPROTO_GRE,
|
|
.iph.tot_len = __bpf_constant_htons(MAGIC_BYTES),
|
|
.iph_inner.ihl = 5,
|
|
.iph_inner.protocol = IPPROTO_TCP,
|
|
.iph_inner.tot_len =
|
|
__bpf_constant_htons(MAGIC_BYTES -
|
|
sizeof(struct iphdr)),
|
|
.tcp.doff = 5,
|
|
.tcp.source = 80,
|
|
.tcp.dest = 8080,
|
|
},
|
|
.keys = {
|
|
.flags = BPF_FLOW_DISSECTOR_F_STOP_AT_ENCAP,
|
|
.nhoff = ETH_HLEN,
|
|
.thoff = ETH_HLEN + sizeof(struct iphdr)
|
|
+ sizeof(struct gre_base_hdr),
|
|
.addr_proto = ETH_P_IP,
|
|
.ip_proto = IPPROTO_GRE,
|
|
.n_proto = __bpf_constant_htons(ETH_P_IP),
|
|
.is_encap = true,
|
|
},
|
|
.flags = BPF_FLOW_DISSECTOR_F_STOP_AT_ENCAP,
|
|
.retval = BPF_OK,
|
|
},
|
|
};
|
|
|
|
void serial_test_flow_dissector_namespace(void)
|
|
{
|
|
struct bpf_flow *skel;
|
|
struct nstoken *ns;
|
|
int err, prog_fd;
|
|
|
|
skel = bpf_flow__open_and_load();
|
|
if (!ASSERT_OK_PTR(skel, "open/load skeleton"))
|
|
return;
|
|
|
|
prog_fd = bpf_program__fd(skel->progs._dissect);
|
|
if (!ASSERT_OK_FD(prog_fd, "get dissector fd"))
|
|
goto out_destroy_skel;
|
|
|
|
/* We must be able to attach a flow dissector to root namespace */
|
|
err = bpf_prog_attach(prog_fd, 0, BPF_FLOW_DISSECTOR, 0);
|
|
if (!ASSERT_OK(err, "attach on root namespace ok"))
|
|
goto out_destroy_skel;
|
|
|
|
err = make_netns(TEST_NS);
|
|
if (!ASSERT_OK(err, "create non-root net namespace"))
|
|
goto out_destroy_skel;
|
|
|
|
/* We must not be able to additionally attach a flow dissector to a
|
|
* non-root net namespace
|
|
*/
|
|
ns = open_netns(TEST_NS);
|
|
if (!ASSERT_OK_PTR(ns, "enter non-root net namespace"))
|
|
goto out_clean_ns;
|
|
err = bpf_prog_attach(prog_fd, 0, BPF_FLOW_DISSECTOR, 0);
|
|
if (!ASSERT_ERR(err,
|
|
"refuse new flow dissector in non-root net namespace"))
|
|
bpf_prog_detach2(prog_fd, 0, BPF_FLOW_DISSECTOR);
|
|
else
|
|
ASSERT_EQ(errno, EEXIST,
|
|
"refused because of already attached prog");
|
|
close_netns(ns);
|
|
|
|
/* If no flow dissector is attached to the root namespace, we must
|
|
* be able to attach one to a non-root net namespace
|
|
*/
|
|
bpf_prog_detach2(prog_fd, 0, BPF_FLOW_DISSECTOR);
|
|
ns = open_netns(TEST_NS);
|
|
ASSERT_OK_PTR(ns, "enter non-root net namespace");
|
|
err = bpf_prog_attach(prog_fd, 0, BPF_FLOW_DISSECTOR, 0);
|
|
close_netns(ns);
|
|
ASSERT_OK(err, "accept new flow dissector in non-root net namespace");
|
|
|
|
/* If a flow dissector is attached to non-root net namespace, attaching
|
|
* a flow dissector to root namespace must fail
|
|
*/
|
|
err = bpf_prog_attach(prog_fd, 0, BPF_FLOW_DISSECTOR, 0);
|
|
if (!ASSERT_ERR(err, "refuse new flow dissector on root namespace"))
|
|
bpf_prog_detach2(prog_fd, 0, BPF_FLOW_DISSECTOR);
|
|
else
|
|
ASSERT_EQ(errno, EEXIST,
|
|
"refused because of already attached prog");
|
|
|
|
ns = open_netns(TEST_NS);
|
|
bpf_prog_detach2(prog_fd, 0, BPF_FLOW_DISSECTOR);
|
|
close_netns(ns);
|
|
out_clean_ns:
|
|
remove_netns(TEST_NS);
|
|
out_destroy_skel:
|
|
bpf_flow__destroy(skel);
|
|
}
|
|
|
|
static int create_tap(const char *ifname)
|
|
{
|
|
struct ifreq ifr = {
|
|
.ifr_flags = IFF_TAP | IFF_NO_PI | IFF_NAPI | IFF_NAPI_FRAGS,
|
|
};
|
|
int fd, ret;
|
|
|
|
strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
|
|
|
|
fd = open("/dev/net/tun", O_RDWR);
|
|
if (fd < 0)
|
|
return -1;
|
|
|
|
ret = ioctl(fd, TUNSETIFF, &ifr);
|
|
if (ret)
|
|
return -1;
|
|
|
|
return fd;
|
|
}
|
|
|
|
static int tx_tap(int fd, void *pkt, size_t len)
|
|
{
|
|
struct iovec iov[] = {
|
|
{
|
|
.iov_len = len,
|
|
.iov_base = pkt,
|
|
},
|
|
};
|
|
return writev(fd, iov, ARRAY_SIZE(iov));
|
|
}
|
|
|
|
static int ifup(const char *ifname)
|
|
{
|
|
struct ifreq ifr = {};
|
|
int sk, ret;
|
|
|
|
strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
|
|
|
|
sk = socket(PF_INET, SOCK_DGRAM, 0);
|
|
if (sk < 0)
|
|
return -1;
|
|
|
|
ret = ioctl(sk, SIOCGIFFLAGS, &ifr);
|
|
if (ret) {
|
|
close(sk);
|
|
return -1;
|
|
}
|
|
|
|
ifr.ifr_flags |= IFF_UP;
|
|
ret = ioctl(sk, SIOCSIFFLAGS, &ifr);
|
|
if (ret) {
|
|
close(sk);
|
|
return -1;
|
|
}
|
|
|
|
close(sk);
|
|
return 0;
|
|
}
|
|
|
|
static int init_prog_array(struct bpf_object *obj, struct bpf_map *prog_array)
|
|
{
|
|
int i, err, map_fd, prog_fd;
|
|
struct bpf_program *prog;
|
|
char prog_name[32];
|
|
|
|
map_fd = bpf_map__fd(prog_array);
|
|
if (map_fd < 0)
|
|
return -1;
|
|
|
|
for (i = 0; i < bpf_map__max_entries(prog_array); i++) {
|
|
snprintf(prog_name, sizeof(prog_name), "flow_dissector_%d", i);
|
|
|
|
prog = bpf_object__find_program_by_name(obj, prog_name);
|
|
if (!prog)
|
|
return -1;
|
|
|
|
prog_fd = bpf_program__fd(prog);
|
|
if (prog_fd < 0)
|
|
return -1;
|
|
|
|
err = bpf_map_update_elem(map_fd, &i, &prog_fd, BPF_ANY);
|
|
if (err)
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void run_tests_skb_less(int tap_fd, struct bpf_map *keys,
|
|
char *test_suffix)
|
|
{
|
|
char test_name[TEST_NAME_MAX_LEN];
|
|
int i, err, keys_fd;
|
|
|
|
keys_fd = bpf_map__fd(keys);
|
|
if (!ASSERT_OK_FD(keys_fd, "bpf_map__fd"))
|
|
return;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(tests); i++) {
|
|
/* Keep in sync with 'flags' from eth_get_headlen. */
|
|
__u32 eth_get_headlen_flags =
|
|
BPF_FLOW_DISSECTOR_F_PARSE_1ST_FRAG;
|
|
struct bpf_flow_keys flow_keys = {};
|
|
__u32 key = (__u32)(tests[i].keys.sport) << 16 |
|
|
tests[i].keys.dport;
|
|
snprintf(test_name, TEST_NAME_MAX_LEN, "%s-%s", tests[i].name,
|
|
test_suffix);
|
|
if (!test__start_subtest(test_name))
|
|
continue;
|
|
|
|
/* For skb-less case we can't pass input flags; run
|
|
* only the tests that have a matching set of flags.
|
|
*/
|
|
|
|
if (tests[i].flags != eth_get_headlen_flags)
|
|
continue;
|
|
|
|
err = tx_tap(tap_fd, &tests[i].pkt, sizeof(tests[i].pkt));
|
|
if (!ASSERT_EQ(err, sizeof(tests[i].pkt), "tx_tap"))
|
|
continue;
|
|
|
|
/* check the stored flow_keys only if BPF_OK expected */
|
|
if (tests[i].retval != BPF_OK)
|
|
continue;
|
|
|
|
err = bpf_map_lookup_elem(keys_fd, &key, &flow_keys);
|
|
if (!ASSERT_OK(err, "bpf_map_lookup_elem"))
|
|
continue;
|
|
|
|
ASSERT_MEMEQ(&flow_keys, &tests[i].keys,
|
|
sizeof(struct bpf_flow_keys),
|
|
"returned flow keys");
|
|
|
|
err = bpf_map_delete_elem(keys_fd, &key);
|
|
ASSERT_OK(err, "bpf_map_delete_elem");
|
|
}
|
|
}
|
|
|
|
void test_flow_dissector_skb_less_direct_attach(void)
|
|
{
|
|
int err, prog_fd, tap_fd;
|
|
struct bpf_flow *skel;
|
|
struct netns_obj *ns;
|
|
|
|
ns = netns_new("flow_dissector_skb_less_indirect_attach_ns", true);
|
|
if (!ASSERT_OK_PTR(ns, "create and open netns"))
|
|
return;
|
|
|
|
skel = bpf_flow__open_and_load();
|
|
if (!ASSERT_OK_PTR(skel, "open/load skeleton"))
|
|
goto out_clean_ns;
|
|
|
|
err = init_prog_array(skel->obj, skel->maps.jmp_table);
|
|
if (!ASSERT_OK(err, "init_prog_array"))
|
|
goto out_destroy_skel;
|
|
|
|
prog_fd = bpf_program__fd(skel->progs._dissect);
|
|
if (!ASSERT_OK_FD(prog_fd, "bpf_program__fd"))
|
|
goto out_destroy_skel;
|
|
|
|
err = bpf_prog_attach(prog_fd, 0, BPF_FLOW_DISSECTOR, 0);
|
|
if (!ASSERT_OK(err, "bpf_prog_attach"))
|
|
goto out_destroy_skel;
|
|
|
|
tap_fd = create_tap("tap0");
|
|
if (!ASSERT_OK_FD(tap_fd, "create_tap"))
|
|
goto out_destroy_skel;
|
|
err = ifup("tap0");
|
|
if (!ASSERT_OK(err, "ifup"))
|
|
goto out_close_tap;
|
|
|
|
run_tests_skb_less(tap_fd, skel->maps.last_dissection,
|
|
"non-skb-direct-attach");
|
|
|
|
err = bpf_prog_detach2(prog_fd, 0, BPF_FLOW_DISSECTOR);
|
|
ASSERT_OK(err, "bpf_prog_detach2");
|
|
|
|
out_close_tap:
|
|
close(tap_fd);
|
|
out_destroy_skel:
|
|
bpf_flow__destroy(skel);
|
|
out_clean_ns:
|
|
netns_free(ns);
|
|
}
|
|
|
|
void test_flow_dissector_skb_less_indirect_attach(void)
|
|
{
|
|
int err, net_fd, tap_fd;
|
|
struct bpf_flow *skel;
|
|
struct bpf_link *link;
|
|
struct netns_obj *ns;
|
|
|
|
ns = netns_new("flow_dissector_skb_less_indirect_attach_ns", true);
|
|
if (!ASSERT_OK_PTR(ns, "create and open netns"))
|
|
return;
|
|
|
|
skel = bpf_flow__open_and_load();
|
|
if (!ASSERT_OK_PTR(skel, "open/load skeleton"))
|
|
goto out_clean_ns;
|
|
|
|
net_fd = open("/proc/self/ns/net", O_RDONLY);
|
|
if (!ASSERT_OK_FD(net_fd, "open(/proc/self/ns/net"))
|
|
goto out_destroy_skel;
|
|
|
|
err = init_prog_array(skel->obj, skel->maps.jmp_table);
|
|
if (!ASSERT_OK(err, "init_prog_array"))
|
|
goto out_destroy_skel;
|
|
|
|
tap_fd = create_tap("tap0");
|
|
if (!ASSERT_OK_FD(tap_fd, "create_tap"))
|
|
goto out_close_ns;
|
|
err = ifup("tap0");
|
|
if (!ASSERT_OK(err, "ifup"))
|
|
goto out_close_tap;
|
|
|
|
link = bpf_program__attach_netns(skel->progs._dissect, net_fd);
|
|
if (!ASSERT_OK_PTR(link, "attach_netns"))
|
|
goto out_close_tap;
|
|
|
|
run_tests_skb_less(tap_fd, skel->maps.last_dissection,
|
|
"non-skb-indirect-attach");
|
|
|
|
err = bpf_link__destroy(link);
|
|
ASSERT_OK(err, "bpf_link__destroy");
|
|
|
|
out_close_tap:
|
|
close(tap_fd);
|
|
out_close_ns:
|
|
close(net_fd);
|
|
out_destroy_skel:
|
|
bpf_flow__destroy(skel);
|
|
out_clean_ns:
|
|
netns_free(ns);
|
|
}
|
|
|
|
void test_flow_dissector_skb(void)
|
|
{
|
|
char test_name[TEST_NAME_MAX_LEN];
|
|
struct bpf_flow *skel;
|
|
int i, err, prog_fd;
|
|
|
|
skel = bpf_flow__open_and_load();
|
|
if (!ASSERT_OK_PTR(skel, "open/load skeleton"))
|
|
return;
|
|
|
|
err = init_prog_array(skel->obj, skel->maps.jmp_table);
|
|
if (!ASSERT_OK(err, "init_prog_array"))
|
|
goto out_destroy_skel;
|
|
|
|
prog_fd = bpf_program__fd(skel->progs._dissect);
|
|
if (!ASSERT_OK_FD(prog_fd, "bpf_program__fd"))
|
|
goto out_destroy_skel;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(tests); i++) {
|
|
struct bpf_flow_keys flow_keys;
|
|
LIBBPF_OPTS(bpf_test_run_opts, topts,
|
|
.data_in = &tests[i].pkt,
|
|
.data_size_in = sizeof(tests[i].pkt),
|
|
.data_out = &flow_keys,
|
|
);
|
|
static struct bpf_flow_keys ctx = {};
|
|
|
|
snprintf(test_name, TEST_NAME_MAX_LEN, "%s-skb", tests[i].name);
|
|
if (!test__start_subtest(test_name))
|
|
continue;
|
|
|
|
if (tests[i].flags) {
|
|
topts.ctx_in = &ctx;
|
|
topts.ctx_size_in = sizeof(ctx);
|
|
ctx.flags = tests[i].flags;
|
|
}
|
|
|
|
err = bpf_prog_test_run_opts(prog_fd, &topts);
|
|
ASSERT_OK(err, "test_run");
|
|
ASSERT_EQ(topts.retval, tests[i].retval, "test_run retval");
|
|
|
|
/* check the resulting flow_keys only if BPF_OK returned */
|
|
if (topts.retval != BPF_OK)
|
|
continue;
|
|
ASSERT_EQ(topts.data_size_out, sizeof(flow_keys),
|
|
"test_run data_size_out");
|
|
ASSERT_MEMEQ(&flow_keys, &tests[i].keys,
|
|
sizeof(struct bpf_flow_keys),
|
|
"returned flow keys");
|
|
}
|
|
|
|
out_destroy_skel:
|
|
bpf_flow__destroy(skel);
|
|
}
|
|
|