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samples/bpf/ibumad_user.c
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BPF: Add sample c...
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// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB /** * ibumad BPF sample user side * * This program is free software; you can redistribute it and/or * modify it under the terms of version 2 of the GNU General Public * License as published by the Free Software Foundation. * * Copyright(c) 2018 Ira Weiny, Intel Corporation */ #include <linux/bpf.h> #include <signal.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <unistd.h> #include <sys/types.h> #include <limits.h> #include <sys/resource.h> #include <getopt.h> #include <net/if.h> #include "bpf_load.h" #include "bpf_util.h" |
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#include <bpf/libbpf.h> |
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BPF: Add sample c...
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static void dump_counts(int fd)
{
__u32 key;
__u64 value;
for (key = 0; key < 256; key++) {
if (bpf_map_lookup_elem(fd, &key, &value)) {
printf("failed to read key %u
", key);
continue;
}
if (value)
printf("0x%02x : %llu
", key, value);
}
}
static void dump_all_counts(void)
{
printf("Read 'Class : count'
");
dump_counts(map_fd[0]);
printf("Write 'Class : count'
");
dump_counts(map_fd[1]);
}
static void dump_exit(int sig)
{
dump_all_counts();
exit(0);
}
static const struct option long_options[] = {
{"help", no_argument, NULL, 'h'},
{"delay", required_argument, NULL, 'd'},
};
static void usage(char *cmd)
{
printf("eBPF test program to count packets from various IP addresses
"
"Usage: %s <options>
"
" --help, -h this menu
"
" --delay, -d <delay> wait <delay> sec between prints [1 - 1000000]
"
, cmd
);
}
int main(int argc, char **argv)
{
unsigned long delay = 5;
int longindex = 0;
int opt;
char bpf_file[256];
/* Create the eBPF kernel code path name.
* This follows the pattern of all of the other bpf samples
*/
snprintf(bpf_file, sizeof(bpf_file), "%s_kern.o", argv[0]);
/* Do one final dump when exiting */
signal(SIGINT, dump_exit);
signal(SIGTERM, dump_exit);
while ((opt = getopt_long(argc, argv, "hd:rSw",
long_options, &longindex)) != -1) {
switch (opt) {
case 'd':
delay = strtoul(optarg, NULL, 0);
if (delay == ULONG_MAX || delay < 0 ||
delay > 1000000) {
fprintf(stderr, "ERROR: invalid delay : %s
",
optarg);
usage(argv[0]);
return 1;
}
break;
default:
case 'h':
usage(argv[0]);
return 1;
}
}
if (load_bpf_file(bpf_file)) {
fprintf(stderr, "ERROR: failed to load eBPF from file : %s
",
bpf_file);
return 1;
}
while (1) {
sleep(delay);
dump_all_counts();
}
return 0;
}
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