cregit-Linux how code gets into the kernel

Release 4.16 samples/bpf/map_perf_test_kern.c

Directory: samples/bpf
/* Copyright (c) 2016 Facebook
 *
 * 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/skbuff.h>
#include <linux/netdevice.h>
#include <linux/version.h>
#include <uapi/linux/bpf.h>
#include "bpf_helpers.h"


#define MAX_ENTRIES 1000

#define MAX_NR_CPUS 1024

struct bpf_map_def SEC("maps") hash_map = {
	.type = BPF_MAP_TYPE_HASH,
	.key_size = sizeof(u32),
	.value_size = sizeof(long),
	.max_entries = MAX_ENTRIES,
};

struct bpf_map_def SEC("maps") lru_hash_map = {
	.type = BPF_MAP_TYPE_LRU_HASH,
	.key_size = sizeof(u32),
	.value_size = sizeof(long),
	.max_entries = 10000,
};

struct bpf_map_def SEC("maps") nocommon_lru_hash_map = {
	.type = BPF_MAP_TYPE_LRU_HASH,
	.key_size = sizeof(u32),
	.value_size = sizeof(long),
	.max_entries = 10000,
	.map_flags = BPF_F_NO_COMMON_LRU,
};

struct bpf_map_def SEC("maps") inner_lru_hash_map = {
	.type = BPF_MAP_TYPE_LRU_HASH,
	.key_size = sizeof(u32),
	.value_size = sizeof(long),
	.max_entries = MAX_ENTRIES,
	.map_flags = BPF_F_NUMA_NODE,
	.numa_node = 0,
};

struct bpf_map_def SEC("maps") array_of_lru_hashs = {
	.type = BPF_MAP_TYPE_ARRAY_OF_MAPS,
	.key_size = sizeof(u32),
	.max_entries = MAX_NR_CPUS,
};

struct bpf_map_def SEC("maps") percpu_hash_map = {
	.type = BPF_MAP_TYPE_PERCPU_HASH,
	.key_size = sizeof(u32),
	.value_size = sizeof(long),
	.max_entries = MAX_ENTRIES,
};

struct bpf_map_def SEC("maps") hash_map_alloc = {
	.type = BPF_MAP_TYPE_HASH,
	.key_size = sizeof(u32),
	.value_size = sizeof(long),
	.max_entries = MAX_ENTRIES,
	.map_flags = BPF_F_NO_PREALLOC,
};

struct bpf_map_def SEC("maps") percpu_hash_map_alloc = {
	.type = BPF_MAP_TYPE_PERCPU_HASH,
	.key_size = sizeof(u32),
	.value_size = sizeof(long),
	.max_entries = MAX_ENTRIES,
	.map_flags = BPF_F_NO_PREALLOC,
};

struct bpf_map_def SEC("maps") lpm_trie_map_alloc = {
	.type = BPF_MAP_TYPE_LPM_TRIE,
	.key_size = 8,
	.value_size = sizeof(long),
	.max_entries = 10000,
	.map_flags = BPF_F_NO_PREALLOC,
};

struct bpf_map_def SEC("maps") array_map = {
	.type = BPF_MAP_TYPE_ARRAY,
	.key_size = sizeof(u32),
	.value_size = sizeof(long),
	.max_entries = MAX_ENTRIES,
};

struct bpf_map_def SEC("maps") lru_hash_lookup_map = {
	.type = BPF_MAP_TYPE_LRU_HASH,
	.key_size = sizeof(u32),
	.value_size = sizeof(long),
	.max_entries = MAX_ENTRIES,
};

SEC("kprobe/sys_getuid")

int stress_hmap(struct pt_regs *ctx) { u32 key = bpf_get_current_pid_tgid(); long init_val = 1; long *value; bpf_map_update_elem(&hash_map, &key, &init_val, BPF_ANY); value = bpf_map_lookup_elem(&hash_map, &key); if (value) bpf_map_delete_elem(&hash_map, &key); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Alexei Starovoitov66100.00%1100.00%
Total66100.00%1100.00%

SEC("kprobe/sys_geteuid")
int stress_percpu_hmap(struct pt_regs *ctx) { u32 key = bpf_get_current_pid_tgid(); long init_val = 1; long *value; bpf_map_update_elem(&percpu_hash_map, &key, &init_val, BPF_ANY); value = bpf_map_lookup_elem(&percpu_hash_map, &key); if (value) bpf_map_delete_elem(&percpu_hash_map, &key); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Alexei Starovoitov66100.00%1100.00%
Total66100.00%1100.00%

SEC("kprobe/sys_getgid")
int stress_hmap_alloc(struct pt_regs *ctx) { u32 key = bpf_get_current_pid_tgid(); long init_val = 1; long *value; bpf_map_update_elem(&hash_map_alloc, &key, &init_val, BPF_ANY); value = bpf_map_lookup_elem(&hash_map_alloc, &key); if (value) bpf_map_delete_elem(&hash_map_alloc, &key); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Alexei Starovoitov66100.00%1100.00%
Total66100.00%1100.00%

SEC("kprobe/sys_getegid")
int stress_percpu_hmap_alloc(struct pt_regs *ctx) { u32 key = bpf_get_current_pid_tgid(); long init_val = 1; long *value; bpf_map_update_elem(&percpu_hash_map_alloc, &key, &init_val, BPF_ANY); value = bpf_map_lookup_elem(&percpu_hash_map_alloc, &key); if (value) bpf_map_delete_elem(&percpu_hash_map_alloc, &key); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Alexei Starovoitov66100.00%1100.00%
Total66100.00%1100.00%

SEC("kprobe/sys_connect")
int stress_lru_hmap_alloc(struct pt_regs *ctx) { char fmt[] = "Failed at stress_lru_hmap_alloc. ret:%dn"; union { u16 dst6[8]; struct { u16 magic0; u16 magic1; u16 tcase; u16 unused16; u32 unused32; u32 key; }; } test_params; struct sockaddr_in6 *in6; u16 test_case; int addrlen, ret; long val = 1; u32 key = 0; in6 = (struct sockaddr_in6 *)PT_REGS_PARM2(ctx); addrlen = (int)PT_REGS_PARM3(ctx); if (addrlen != sizeof(*in6)) return 0; ret = bpf_probe_read(test_params.dst6, sizeof(test_params.dst6), &in6->sin6_addr); if (ret) goto done; if (test_params.magic0 != 0xdead || test_params.magic1 != 0xbeef) return 0; test_case = test_params.tcase; if (test_case != 3) key = bpf_get_prandom_u32(); if (test_case == 0) { ret = bpf_map_update_elem(&lru_hash_map, &key, &val, BPF_ANY); } else if (test_case == 1) { ret = bpf_map_update_elem(&nocommon_lru_hash_map, &key, &val, BPF_ANY); } else if (test_case == 2) { void *nolocal_lru_map; int cpu = bpf_get_smp_processor_id(); nolocal_lru_map = bpf_map_lookup_elem(&array_of_lru_hashs, &cpu); if (!nolocal_lru_map) { ret = -ENOENT; goto done; } ret = bpf_map_update_elem(nolocal_lru_map, &key, &val, BPF_ANY); } else if (test_case == 3) { u32 i; key = test_params.key; #pragma clang loop unroll(full) for (i = 0; i < 32; i++) { bpf_map_lookup_elem(&lru_hash_lookup_map, &key); key++; } } else { ret = -EINVAL; } done: if (ret) bpf_trace_printk(fmt, sizeof(fmt), ret); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Martin KaFai Lau360100.00%4100.00%
Total360100.00%4100.00%

SEC("kprobe/sys_gettid")
int stress_lpm_trie_map_alloc(struct pt_regs *ctx) { union { u32 b32[2]; u8 b8[8]; } key; unsigned int i; key.b32[0] = 32; key.b8[4] = 192; key.b8[5] = 168; key.b8[6] = 0; key.b8[7] = 1; #pragma clang loop unroll(full) for (i = 0; i < 32; ++i) bpf_map_lookup_elem(&lpm_trie_map_alloc, &key); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
David Herrmann109100.00%1100.00%
Total109100.00%1100.00%

SEC("kprobe/sys_getpgid")
int stress_hash_map_lookup(struct pt_regs *ctx) { u32 key = 1, i; long *value; #pragma clang loop unroll(full) for (i = 0; i < 64; ++i) value = bpf_map_lookup_elem(&hash_map, &key); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Alexei Starovoitov56100.00%1100.00%
Total56100.00%1100.00%

SEC("kprobe/sys_getppid")
int stress_array_map_lookup(struct pt_regs *ctx) { u32 key = 1, i; long *value; #pragma clang loop unroll(full) for (i = 0; i < 64; ++i) value = bpf_map_lookup_elem(&array_map, &key); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Alexei Starovoitov56100.00%1100.00%
Total56100.00%1100.00%

char _license[] SEC("license") = "GPL"; u32 _version SEC("version") = LINUX_VERSION_CODE;

Overall Contributors

PersonTokensPropCommitsCommitProp
Alexei Starovoitov62847.04%222.22%
Martin KaFai Lau55541.57%555.56%
David Herrmann15111.31%111.11%
Joel Fernandes10.07%111.11%
Total1335100.00%9100.00%
Directory: samples/bpf
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with cregit.