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fix linter issues for 4-9

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yunwei37
2023-01-23 18:35:32 +08:00
parent 97b626c576
commit a95a767bc9
10 changed files with 250 additions and 835 deletions
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78
6-sigsnoop/README.md
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@@ -13,73 +13,73 @@ eBPF (Extended Berkeley Packet Filter) 是 Linux 内核上的一个强大的网
#include <bpf/bpf_helpers.h>
#include <bpf/bpf_tracing.h>
#define MAX_ENTRIES 10240
#define TASK_COMM_LEN 16
#define MAX_ENTRIES 10240
#define TASK_COMM_LEN 16
struct event {
unsigned int pid;
unsigned int tpid;
int sig;
int ret;
char comm[TASK_COMM_LEN];
unsigned int pid;
unsigned int tpid;
int sig;
int ret;
char comm[TASK_COMM_LEN];
};
struct {
__uint(type, BPF_MAP_TYPE_HASH);
__uint(max_entries, MAX_ENTRIES);
__type(key, __u32);
__type(value, struct event);
__uint(type, BPF_MAP_TYPE_HASH);
__uint(max_entries, MAX_ENTRIES);
__type(key, __u32);
__type(value, struct event);
} values SEC(".maps");
static int probe_entry(pid_t tpid, int sig)
{
struct event event = {};
__u64 pid_tgid;
__u32 tid;
struct event event = {};
__u64 pid_tgid;
__u32 tid;
pid_tgid = bpf_get_current_pid_tgid();
tid = (__u32)pid_tgid;
event.pid = pid_tgid >> 32;
event.tpid = tpid;
event.sig = sig;
bpf_get_current_comm(event.comm, sizeof(event.comm));
bpf_map_update_elem(&values, &tid, &event, BPF_ANY);
return 0;
pid_tgid = bpf_get_current_pid_tgid();
tid = (__u32)pid_tgid;
event.pid = pid_tgid >> 32;
event.tpid = tpid;
event.sig = sig;
bpf_get_current_comm(event.comm, sizeof(event.comm));
bpf_map_update_elem(&values, &tid, &event, BPF_ANY);
return 0;
}
static int probe_exit(void *ctx, int ret)
{
__u64 pid_tgid = bpf_get_current_pid_tgid();
__u32 tid = (__u32)pid_tgid;
struct event *eventp;
__u64 pid_tgid = bpf_get_current_pid_tgid();
__u32 tid = (__u32)pid_tgid;
struct event *eventp;
eventp = bpf_map_lookup_elem(&values, &tid);
if (!eventp)
return 0;
eventp = bpf_map_lookup_elem(&values, &tid);
if (!eventp)
return 0;
eventp->ret = ret;
bpf_printk("PID %d (%s) sent signal %d to PID %d, ret = %d",
eventp->pid, eventp->comm, eventp->sig, eventp->tpid, ret);
eventp->ret = ret;
bpf_printk("PID %d (%s) sent signal %d to PID %d, ret = %d",
eventp->pid, eventp->comm, eventp->sig, eventp->tpid, ret);
cleanup:
bpf_map_delete_elem(&values, &tid);
return 0;
bpf_map_delete_elem(&values, &tid);
return 0;
}
SEC("tracepoint/syscalls/sys_enter_kill")
int kill_entry(struct trace_event_raw_sys_enter *ctx)
{
pid_t tpid = (pid_t)ctx->args[0];
int sig = (int)ctx->args[1];
pid_t tpid = (pid_t)ctx->args[0];
int sig = (int)ctx->args[1];
return probe_entry(tpid, sig);
return probe_entry(tpid, sig);
}
SEC("tracepoint/syscalls/sys_exit_kill")
int kill_exit(struct trace_event_raw_sys_exit *ctx)
{
return probe_exit(ctx, ctx->ret);
return probe_exit(ctx, ctx->ret);
}
char LICENSE[] SEC("license") = "Dual BSD/GPL";
@@ -121,4 +121,6 @@ $ sudo cat /sys/kernel/debug/tracing/trace_pipe
## 总结
更多的例子和详细的开发指南，请参考 eunomia-bpf 的官方文档：https://github.com/eunomia-bpf/eunomia-bpf
更多的例子和详细的开发指南，请参考 eunomia-bpf 的官方文档：<https://github.com/eunomia-bpf/eunomia-bpf>
完整的教程和源代码已经全部开源，可以在 <https://github.com/eunomia-bpf/bpf-developer-tutorial> 中查看。