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Date: Wed, 24 Nov 2021 17:18:18 +0800
From: Ong Boon Leong <boon.leong.ong@...el.com>
To: bpf@...r.kernel.org, netdev@...r.kernel.org
Cc: bjorn@...nel.org, Magnus Karlsson <magnus.karlsson@...el.com>,
Jonathan Lemon <jonathan.lemon@...il.com>,
Alexei Starovoitov <ast@...nel.org>,
Daniel Borkmann <daniel@...earbox.net>,
"David S . Miller" <davem@...emloft.net>,
Jakub Kicinski <kuba@...nel.org>,
Jesper Dangaard Brouer <hawk@...nel.org>,
John Fastabend <john.fastabend@...il.com>,
Andrii Nakryiko <andrii@...nel.org>,
Martin KaFai Lau <kafai@...com>,
Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
KP Singh <kpsingh@...nel.org>,
Ong Boon Leong <boon.leong.ong@...el.com>
Subject: [PATCH bpf-next 1/4] samples/bpf: xdpsock: add VLAN support for Tx-only operation
In multi-queue environment testing, the support for VLAN-tag based
steering is useful. So, this patch adds the capability to add
VLAN tag (VLAN ID and Priority) to the generated Tx frame.
To set the VLAN ID=10 and Priority=2 for Tx only through TxQ=3:
$ xdpsock -i eth0 -t -N -z -q 3 -V -J 10 -K 2
If VLAN ID (-J) and Priority (-K) is set, it default to
VLAN ID = 1
VLAN Priority = 0.
For example, VLAN-tagged Tx only, xdp copy mode through TxQ=1:
$ xdpsock -i eth0 -t -N -c -q 1 -V
Signed-off-by: Ong Boon Leong <boon.leong.ong@...el.com>
---
samples/bpf/xdpsock_user.c | 90 +++++++++++++++++++++++++++++++-------
1 file changed, 75 insertions(+), 15 deletions(-)
diff --git a/samples/bpf/xdpsock_user.c b/samples/bpf/xdpsock_user.c
index 49d7a6ad7e3..e09fabecd69 100644
--- a/samples/bpf/xdpsock_user.c
+++ b/samples/bpf/xdpsock_user.c
@@ -53,6 +53,12 @@
#define DEBUG_HEXDUMP 0
+#define VLAN_PRIO_MASK 0xe000 /* Priority Code Point */
+#define VLAN_PRIO_SHIFT 13
+#define VLAN_VID_MASK 0x0fff /* VLAN Identifier */
+#define VLAN_VID__DEFAULT 1
+#define VLAN_PRI__DEFAULT 0
+
typedef __u64 u64;
typedef __u32 u32;
typedef __u16 u16;
@@ -78,6 +84,9 @@ static u32 opt_batch_size = 64;
static int opt_pkt_count;
static u16 opt_pkt_size = MIN_PKT_SIZE;
static u32 opt_pkt_fill_pattern = 0x12345678;
+static bool opt_vlan_tag;
+static u16 opt_pkt_vlan_id = VLAN_VID__DEFAULT;
+static u16 opt_pkt_vlan_pri = VLAN_PRI__DEFAULT;
static bool opt_extra_stats;
static bool opt_quiet;
static bool opt_app_stats;
@@ -98,6 +107,14 @@ static u32 prog_id;
static bool opt_busy_poll;
static bool opt_reduced_cap;
+struct vlan_ethhdr {
+ unsigned char h_dest[6];
+ unsigned char h_source[6];
+ __be16 h_vlan_proto;
+ __be16 h_vlan_TCI;
+ __be16 h_vlan_encapsulated_proto;
+};
+
struct xsk_ring_stats {
unsigned long rx_npkts;
unsigned long tx_npkts;
@@ -737,11 +754,13 @@ static inline u16 udp_csum(u32 saddr, u32 daddr, u32 len,
#define ETH_FCS_SIZE 4
-#define PKT_HDR_SIZE (sizeof(struct ethhdr) + sizeof(struct iphdr) + \
+#define ETH_HDR_SIZE (opt_vlan_tag ? sizeof(struct vlan_ethhdr) : \
+ sizeof(struct ethhdr))
+#define PKT_HDR_SIZE (ETH_HDR_SIZE + sizeof(struct iphdr) + \
sizeof(struct udphdr))
#define PKT_SIZE (opt_pkt_size - ETH_FCS_SIZE)
-#define IP_PKT_SIZE (PKT_SIZE - sizeof(struct ethhdr))
+#define IP_PKT_SIZE (PKT_SIZE - ETH_HDR_SIZE)
#define UDP_PKT_SIZE (IP_PKT_SIZE - sizeof(struct iphdr))
#define UDP_PKT_DATA_SIZE (UDP_PKT_SIZE - sizeof(struct udphdr))
@@ -749,17 +768,42 @@ static u8 pkt_data[XSK_UMEM__DEFAULT_FRAME_SIZE];
static void gen_eth_hdr_data(void)
{
- struct udphdr *udp_hdr = (struct udphdr *)(pkt_data +
- sizeof(struct ethhdr) +
- sizeof(struct iphdr));
- struct iphdr *ip_hdr = (struct iphdr *)(pkt_data +
- sizeof(struct ethhdr));
- struct ethhdr *eth_hdr = (struct ethhdr *)pkt_data;
-
- /* ethernet header */
- memcpy(eth_hdr->h_dest, "\x3c\xfd\xfe\x9e\x7f\x71", ETH_ALEN);
- memcpy(eth_hdr->h_source, "\xec\xb1\xd7\x98\x3a\xc0", ETH_ALEN);
- eth_hdr->h_proto = htons(ETH_P_IP);
+ struct udphdr *udp_hdr;
+ struct iphdr *ip_hdr;
+
+ if (opt_vlan_tag) {
+ struct vlan_ethhdr *veth_hdr = (struct vlan_ethhdr *)pkt_data;
+ u16 vlan_tci = 0;
+
+ udp_hdr = (struct udphdr *)(pkt_data +
+ sizeof(struct vlan_ethhdr) +
+ sizeof(struct iphdr));
+ ip_hdr = (struct iphdr *)(pkt_data +
+ sizeof(struct vlan_ethhdr));
+
+ /* ethernet & VLAN header */
+ memcpy(veth_hdr->h_dest, "\x3c\xfd\xfe\x9e\x7f\x71", ETH_ALEN);
+ memcpy(veth_hdr->h_source, "\xec\xb1\xd7\x98\x3a\xc0", ETH_ALEN);
+ veth_hdr->h_vlan_proto = htons(ETH_P_8021Q);
+ vlan_tci = opt_pkt_vlan_id & VLAN_VID_MASK;
+ vlan_tci |= (opt_pkt_vlan_pri << VLAN_PRIO_SHIFT) & VLAN_PRIO_MASK;
+ veth_hdr->h_vlan_TCI = htons(vlan_tci);
+ veth_hdr->h_vlan_encapsulated_proto = htons(ETH_P_IP);
+ } else {
+ struct ethhdr *eth_hdr = (struct ethhdr *)pkt_data;
+
+ udp_hdr = (struct udphdr *)(pkt_data +
+ sizeof(struct ethhdr) +
+ sizeof(struct iphdr));
+ ip_hdr = (struct iphdr *)(pkt_data +
+ sizeof(struct ethhdr));
+
+ /* ethernet header */
+ memcpy(eth_hdr->h_dest, "\x3c\xfd\xfe\x9e\x7f\x71", ETH_ALEN);
+ memcpy(eth_hdr->h_source, "\xec\xb1\xd7\x98\x3a\xc0", ETH_ALEN);
+ eth_hdr->h_proto = htons(ETH_P_IP);
+ }
+
/* IP header */
ip_hdr->version = IPVERSION;
@@ -917,6 +961,9 @@ static struct option long_options[] = {
{"tx-pkt-count", required_argument, 0, 'C'},
{"tx-pkt-size", required_argument, 0, 's'},
{"tx-pkt-pattern", required_argument, 0, 'P'},
+ {"tx-vlan", no_argument, 0, 'V'},
+ {"tx-vlan-id", required_argument, 0, 'J'},
+ {"tx-vlan-pri", required_argument, 0, 'K'},
{"extra-stats", no_argument, 0, 'x'},
{"quiet", no_argument, 0, 'Q'},
{"app-stats", no_argument, 0, 'a'},
@@ -957,6 +1004,9 @@ static void usage(const char *prog)
" (Default: %d bytes)\n"
" Min size: %d, Max size %d.\n"
" -P, --tx-pkt-pattern=nPacket fill pattern. Default: 0x%x\n"
+ " -V, --tx-vlan Send VLAN tagged packets (For -t|--txonly)\n"
+ " -J, --tx-vlan-id=n Tx VLAN ID [1-4095]. Default: %d (For -V|--tx-vlan)\n"
+ " -K, --tx-vlan-pri=n Tx VLAN Priority [0-7]. Default: %d (For -V|--tx-vlan)\n"
" -x, --extra-stats Display extra statistics.\n"
" -Q, --quiet Do not display any stats.\n"
" -a, --app-stats Display application (syscall) statistics.\n"
@@ -966,7 +1016,8 @@ static void usage(const char *prog)
"\n";
fprintf(stderr, str, prog, XSK_UMEM__DEFAULT_FRAME_SIZE,
opt_batch_size, MIN_PKT_SIZE, MIN_PKT_SIZE,
- XSK_UMEM__DEFAULT_FRAME_SIZE, opt_pkt_fill_pattern);
+ XSK_UMEM__DEFAULT_FRAME_SIZE, opt_pkt_fill_pattern,
+ VLAN_VID__DEFAULT, VLAN_PRI__DEFAULT);
exit(EXIT_FAILURE);
}
@@ -978,7 +1029,7 @@ static void parse_command_line(int argc, char **argv)
opterr = 0;
for (;;) {
- c = getopt_long(argc, argv, "Frtli:q:pSNn:czf:muMd:b:C:s:P:xQaI:BR",
+ c = getopt_long(argc, argv, "Frtli:q:pSNn:czf:muMd:b:C:s:P:VJ:K:xQaI:BR",
long_options, &option_index);
if (c == -1)
break;
@@ -1059,6 +1110,15 @@ static void parse_command_line(int argc, char **argv)
case 'P':
opt_pkt_fill_pattern = strtol(optarg, NULL, 16);
break;
+ case 'V':
+ opt_vlan_tag = true;
+ break;
+ case 'J':
+ opt_pkt_vlan_id = atoi(optarg);
+ break;
+ case 'K':
+ opt_pkt_vlan_pri = atoi(optarg);
+ break;
case 'x':
opt_extra_stats = 1;
break;
--
2.25.1
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