Release 4.7 samples/bpf/tracex5_kern.c
/* Copyright (c) 2015 PLUMgrid, http://plumgrid.com
*
* 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.
*/
#include <linux/ptrace.h>
#include <linux/version.h>
#include <uapi/linux/bpf.h>
#include <uapi/linux/seccomp.h>
#include "bpf_helpers.h"
#define PROG(F) SEC("kprobe/"__stringify(F)) int bpf_func_##F
struct bpf_map_def SEC("maps") progs = {
.type = BPF_MAP_TYPE_PROG_ARRAY,
.key_size = sizeof(u32),
.value_size = sizeof(u32),
.max_entries = 1024,
};
SEC("kprobe/seccomp_phase1")
int bpf_prog1(struct pt_regs *ctx)
{
struct seccomp_data sd;
bpf_probe_read(&sd, sizeof(sd), (void *)PT_REGS_PARM1(ctx));
/* dispatch into next BPF program depending on syscall number */
bpf_tail_call(ctx, &progs, sd.nr);
/* fall through -> unknown syscall */
if (sd.nr >= __NR_getuid && sd.nr <= __NR_getsid) {
char fmt[] = "syscall=%d (one of get/set uid/pid/gid)\n";
bpf_trace_printk(fmt, sizeof(fmt), sd.nr);
}
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| alexei starovoitov | alexei starovoitov | 84 | 96.55% | 1 | 50.00% |
| michael holzheu | michael holzheu | 3 | 3.45% | 1 | 50.00% |
| Total | 87 | 100.00% | 2 | 100.00% |
/* we jump here when syscall number == __NR_write */
PROG(__NR_write)(struct pt_regs *ctx)
{
struct seccomp_data sd;
bpf_probe_read(&sd, sizeof(sd), (void *)PT_REGS_PARM1(ctx));
if (sd.args[2] == 512) {
char fmt[] = "write(fd=%d, buf=%p, size=%d)\n";
bpf_trace_printk(fmt, sizeof(fmt),
sd.args[0], sd.args[1], sd.args[2]);
}
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| alexei starovoitov | alexei starovoitov | 86 | 96.63% | 1 | 50.00% |
| michael holzheu | michael holzheu | 3 | 3.37% | 1 | 50.00% |
| Total | 89 | 100.00% | 2 | 100.00% |
PROG(__NR_read)(struct pt_regs *ctx)
{
struct seccomp_data sd;
bpf_probe_read(&sd, sizeof(sd), (void *)PT_REGS_PARM1(ctx));
if (sd.args[2] > 128 && sd.args[2] <= 1024) {
char fmt[] = "read(fd=%d, buf=%p, size=%d)\n";
bpf_trace_printk(fmt, sizeof(fmt),
sd.args[0], sd.args[1], sd.args[2]);
}
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| alexei starovoitov | alexei starovoitov | 95 | 96.94% | 1 | 50.00% |
| michael holzheu | michael holzheu | 3 | 3.06% | 1 | 50.00% |
| Total | 98 | 100.00% | 2 | 100.00% |
PROG(__NR_mmap)(struct pt_regs *ctx)
{
char fmt[] = "mmap\n";
bpf_trace_printk(fmt, sizeof(fmt));
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| alexei starovoitov | alexei starovoitov | 31 | 100.00% | 1 | 100.00% |
| Total | 31 | 100.00% | 1 | 100.00% |
char _license[] SEC("license") = "GPL";
u32 _version SEC("version") = LINUX_VERSION_CODE;
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| alexei starovoitov | alexei starovoitov | 379 | 97.68% | 1 | 50.00% |
| michael holzheu | michael holzheu | 9 | 2.32% | 1 | 50.00% |
| Total | 388 | 100.00% | 2 | 100.00% |
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