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samples, bpf: Refactor kprobe, tail call kern progs map definition 

Because the previous two commit replaced the bpf_load implementation of
the user program with libbpf, the corresponding kernel program's MAP
definition can be replaced with new BTF-defined map syntax.

This commit only updates the samples which uses libbpf API for loading
bpf program not with bpf_load.

Signed-off-by: Daniel T. Lee <danieltimlee@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Yonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/bpf/20200516040608.1377876-6-danieltimlee@gmail.com
This commit is contained in:
Daniel T. Lee 2020-05-16 13:06:08 +09:00 committed by Daniel Borkmann
parent 14846dda63
commit 59929cd1fe
8 changed files with 93 additions and 91 deletions
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12
samples/bpf/sampleip_kern.c
View File

@ -13,12 +13,12 @@
#define MAX_IPS 8192
struct bpf_map_def SEC("maps") ip_map = {
.type = BPF_MAP_TYPE_HASH,
.key_size = sizeof(u64),
.value_size = sizeof(u32),
.max_entries = MAX_IPS,
};
struct {
__uint(type, BPF_MAP_TYPE_HASH);
__type(key, u64);
__type(value, u32);
__uint(max_entries, MAX_IPS);
} ip_map SEC(".maps");
SEC("perf_event")
int do_sample(struct bpf_perf_event_data *ctx)

36
samples/bpf/sockex3_kern.c
View File

@ -19,12 +19,12 @@
#define PROG(F) SEC("socket/"__stringify(F)) int bpf_func_##F
struct bpf_map_def SEC("maps") jmp_table = {
.type = BPF_MAP_TYPE_PROG_ARRAY,
.key_size = sizeof(u32),
.value_size = sizeof(u32),
.max_entries = 8,
};
struct {
__uint(type, BPF_MAP_TYPE_PROG_ARRAY);
__uint(key_size, sizeof(u32));
__uint(value_size, sizeof(u32));
__uint(max_entries, 8);
} jmp_table SEC(".maps");
#define PARSE_VLAN 1
#define PARSE_MPLS 2
@ -92,12 +92,12 @@ struct globals {
struct flow_key_record flow;
};
struct bpf_map_def SEC("maps") percpu_map = {
.type = BPF_MAP_TYPE_ARRAY,
.key_size = sizeof(__u32),
.value_size = sizeof(struct globals),
.max_entries = 32,
};
struct {
__uint(type, BPF_MAP_TYPE_ARRAY);
__type(key, __u32);
__type(value, struct globals);
__uint(max_entries, 32);
} percpu_map SEC(".maps");
/* user poor man's per_cpu until native support is ready */
static struct globals *this_cpu_globals(void)
@ -113,12 +113,12 @@ struct pair {
__u64 bytes;
};
struct bpf_map_def SEC("maps") hash_map = {
.type = BPF_MAP_TYPE_HASH,
.key_size = sizeof(struct flow_key_record),
.value_size = sizeof(struct pair),
.max_entries = 1024,
};
struct {
__uint(type, BPF_MAP_TYPE_HASH);
__type(key, struct flow_key_record);
__type(value, struct pair);
__uint(max_entries, 1024);
} hash_map SEC(".maps");
static void update_stats(struct __sk_buff *skb, struct globals *g)
{

24
samples/bpf/trace_event_kern.c
View File

@ -18,19 +18,19 @@ struct key_t {
u32 userstack;
};
struct bpf_map_def SEC("maps") counts = {
.type = BPF_MAP_TYPE_HASH,
.key_size = sizeof(struct key_t),
.value_size = sizeof(u64),
.max_entries = 10000,
};
struct {
__uint(type, BPF_MAP_TYPE_HASH);
__type(key, struct key_t);
__type(value, u64);
__uint(max_entries, 10000);
} counts SEC(".maps");
struct bpf_map_def SEC("maps") stackmap = {
.type = BPF_MAP_TYPE_STACK_TRACE,
.key_size = sizeof(u32),
.value_size = PERF_MAX_STACK_DEPTH * sizeof(u64),
.max_entries = 10000,
};
struct {
__uint(type, BPF_MAP_TYPE_STACK_TRACE);
__uint(key_size, sizeof(u32));
__uint(value_size, PERF_MAX_STACK_DEPTH * sizeof(u64));
__uint(max_entries, 10000);
} stackmap SEC(".maps");
#define KERN_STACKID_FLAGS (0 | BPF_F_FAST_STACK_CMP)
#define USER_STACKID_FLAGS (0 | BPF_F_FAST_STACK_CMP | BPF_F_USER_STACK)

24
samples/bpf/tracex2_kern.c
View File

@ -12,12 +12,12 @@
#include <bpf/bpf_tracing.h>
#include "trace_common.h"
struct bpf_map_def SEC("maps") my_map = {
.type = BPF_MAP_TYPE_HASH,
.key_size = sizeof(long),
.value_size = sizeof(long),
.max_entries = 1024,
};
struct {
__uint(type, BPF_MAP_TYPE_HASH);
__type(key, long);
__type(value, long);
__uint(max_entries, 1024);
} my_map SEC(".maps");
/* kprobe is NOT a stable ABI. If kernel internals change this bpf+kprobe
* example will no longer be meaningful
@ -71,12 +71,12 @@ struct hist_key {
u64 index;
};
struct bpf_map_def SEC("maps") my_hist_map = {
.type = BPF_MAP_TYPE_PERCPU_HASH,
.key_size = sizeof(struct hist_key),
.value_size = sizeof(long),
.max_entries = 1024,
};
struct {
__uint(type, BPF_MAP_TYPE_PERCPU_HASH);
__uint(key_size, sizeof(struct hist_key));
__uint(value_size, sizeof(long));
__uint(max_entries, 1024);
} my_hist_map SEC(".maps");
SEC("kprobe/" SYSCALL(sys_write))
int bpf_prog3(struct pt_regs *ctx)

24
samples/bpf/tracex3_kern.c
View File

@ -11,12 +11,12 @@
#include <bpf/bpf_helpers.h>
#include <bpf/bpf_tracing.h>
struct bpf_map_def SEC("maps") my_map = {
.type = BPF_MAP_TYPE_HASH,
.key_size = sizeof(long),
.value_size = sizeof(u64),
.max_entries = 4096,
};
struct {
__uint(type, BPF_MAP_TYPE_HASH);
__type(key, long);
__type(value, u64);
__uint(max_entries, 4096);
} my_map SEC(".maps");
/* kprobe is NOT a stable ABI. If kernel internals change this bpf+kprobe
* example will no longer be meaningful
@ -42,12 +42,12 @@ static unsigned int log2l(unsigned long long n)
#define SLOTS 100
struct bpf_map_def SEC("maps") lat_map = {
.type = BPF_MAP_TYPE_PERCPU_ARRAY,
.key_size = sizeof(u32),
.value_size = sizeof(u64),
.max_entries = SLOTS,
};
struct {
__uint(type, BPF_MAP_TYPE_PERCPU_ARRAY);
__uint(key_size, sizeof(u32));
__uint(value_size, sizeof(u64));
__uint(max_entries, SLOTS);
} lat_map SEC(".maps");
SEC("kprobe/blk_account_io_completion")
int bpf_prog2(struct pt_regs *ctx)

12
samples/bpf/tracex4_kern.c
View File

@ -15,12 +15,12 @@ struct pair {
u64 ip;
};
struct bpf_map_def SEC("maps") my_map = {
.type = BPF_MAP_TYPE_HASH,
.key_size = sizeof(long),
.value_size = sizeof(struct pair),
.max_entries = 1000000,
};
struct {
__uint(type, BPF_MAP_TYPE_HASH);
__type(key, long);
__type(value, struct pair);
__uint(max_entries, 1000000);
} my_map SEC(".maps");
/* kprobe is NOT a stable ABI. If kernel internals change this bpf+kprobe
* example will no longer be meaningful

14
samples/bpf/tracex5_kern.c
View File

@ -15,16 +15,16 @@
#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),
struct {
__uint(type, BPF_MAP_TYPE_PROG_ARRAY);
__uint(key_size, sizeof(u32));
__uint(value_size, sizeof(u32));
#ifdef __mips__
.max_entries = 6000, /* MIPS n64 syscalls start at 5000 */
__uint(max_entries, 6000); /* MIPS n64 syscalls start at 5000 */
#else
.max_entries = 1024,
__uint(max_entries, 1024);
#endif
};
} progs SEC(".maps");
SEC("kprobe/__seccomp_filter")
int bpf_prog1(struct pt_regs *ctx)

38
samples/bpf/tracex6_kern.c
View File

@ -3,24 +3,26 @@
#include <uapi/linux/bpf.h>
#include <bpf/bpf_helpers.h>
struct bpf_map_def SEC("maps") counters = {
.type = BPF_MAP_TYPE_PERF_EVENT_ARRAY,
.key_size = sizeof(int),
.value_size = sizeof(u32),
.max_entries = 64,
};
struct bpf_map_def SEC("maps") values = {
.type = BPF_MAP_TYPE_HASH,
.key_size = sizeof(int),
.value_size = sizeof(u64),
.max_entries = 64,
};
struct bpf_map_def SEC("maps") values2 = {
.type = BPF_MAP_TYPE_HASH,
.key_size = sizeof(int),
.value_size = sizeof(struct bpf_perf_event_value),
.max_entries = 64,
};
struct {
__uint(type, BPF_MAP_TYPE_PERF_EVENT_ARRAY);
__uint(key_size, sizeof(int));
__uint(value_size, sizeof(u32));
__uint(max_entries, 64);
} counters SEC(".maps");
struct {
__uint(type, BPF_MAP_TYPE_HASH);
__type(key, int);
__type(value, u64);
__uint(max_entries, 64);
} values SEC(".maps");
struct {
__uint(type, BPF_MAP_TYPE_HASH);
__type(key, int);
__type(value, struct bpf_perf_event_value);
__uint(max_entries, 64);
} values2 SEC(".maps");
SEC("kprobe/htab_map_get_next_key")
int bpf_prog1(struct pt_regs *ctx)