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authorJay Jayatheerthan <jay.jayatheerthan@intel.com>2019-12-20 14:25:30 +0530
committerAlexei Starovoitov <ast@kernel.org>2019-12-20 16:10:39 -0800
commit46e3268eaaca9f8a0f145872b96fe6d54a232890 (patch)
tree8ef2139e4421af7f64a5aede0c2190c30634dd7c /samples
parent4a3c23ae3acc6185a9d418830f22672a52ff986a (diff)
downloadlinux-46e3268eaaca9f8a0f145872b96fe6d54a232890.tar.bz2
samples/bpf: xdpsock: Add option to specify transmit fill pattern
The UDP payload fill pattern can be specified using '-P' or '--tx-pkt-pattern' option. It is an unsigned 32 bit field and defaulted to 0x12345678. The IP and UDP checksum is calculated by the code as per the content of the packet before transmission. Signed-off-by: Jay Jayatheerthan <jay.jayatheerthan@intel.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20191220085530.4980-7-jay.jayatheerthan@intel.com
Diffstat (limited to 'samples')
-rw-r--r--samples/bpf/xdpsock_user.c13
1 files changed, 9 insertions, 4 deletions
diff --git a/samples/bpf/xdpsock_user.c b/samples/bpf/xdpsock_user.c
index 2297158a32bd..d74c4c83fc93 100644
--- a/samples/bpf/xdpsock_user.c
+++ b/samples/bpf/xdpsock_user.c
@@ -76,7 +76,7 @@ static bool benchmark_done;
static u32 opt_batch_size = 64;
static int opt_pkt_count;
static u16 opt_pkt_size = MIN_PKT_SIZE;
-static u32 pkt_fill_pattern = 0x12345678;
+static u32 opt_pkt_fill_pattern = 0x12345678;
static int opt_poll;
static int opt_interval = 1;
static u32 opt_xdp_bind_flags = XDP_USE_NEED_WAKEUP;
@@ -517,7 +517,7 @@ static void gen_eth_hdr_data(void)
udp_hdr->len = htons(UDP_PKT_SIZE);
/* UDP data */
- memset32_htonl(pkt_data + PKT_HDR_SIZE, pkt_fill_pattern,
+ memset32_htonl(pkt_data + PKT_HDR_SIZE, opt_pkt_fill_pattern,
UDP_PKT_DATA_SIZE);
/* UDP header checksum */
@@ -630,6 +630,7 @@ static struct option long_options[] = {
{"batch-size", required_argument, 0, 'b'},
{"tx-pkt-count", required_argument, 0, 'C'},
{"tx-pkt-size", required_argument, 0, 's'},
+ {"tx-pkt-pattern", required_argument, 0, 'P'},
{0, 0, 0, 0}
};
@@ -663,10 +664,11 @@ static void usage(const char *prog)
" -s, --tx-pkt-size=n Transmit packet size.\n"
" (Default: %d bytes)\n"
" Min size: %d, Max size %d.\n"
+ " -P, --tx-pkt-pattern=nPacket fill pattern. Default: 0x%x\n"
"\n";
fprintf(stderr, str, prog, XSK_UMEM__DEFAULT_FRAME_SIZE,
opt_batch_size, MIN_PKT_SIZE, MIN_PKT_SIZE,
- XSK_UMEM__DEFAULT_FRAME_SIZE);
+ XSK_UMEM__DEFAULT_FRAME_SIZE, opt_pkt_fill_pattern);
exit(EXIT_FAILURE);
}
@@ -678,7 +680,7 @@ 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:",
+ c = getopt_long(argc, argv, "Frtli:q:pSNn:czf:muMd:b:C:s:P:",
long_options, &option_index);
if (c == -1)
break;
@@ -756,6 +758,9 @@ static void parse_command_line(int argc, char **argv)
usage(basename(argv[0]));
}
break;
+ case 'P':
+ opt_pkt_fill_pattern = strtol(optarg, NULL, 16);
+ break;
default:
usage(basename(argv[0]));
}