tools/testing/selftests/bpf/progs/bench_local_storage_create.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /* Copyright (c) 2023 Meta Platforms, Inc. and affiliates. */
   3
   4 #include "vmlinux.h"
   5 #include "bpf_tracing_net.h"
   6 #include <bpf/bpf_tracing.h>
   7 #include <bpf/bpf_helpers.h>
   8
   9 long create_errs = 0;
  10 long create_cnts = 0;
  11 long kmalloc_cnts = 0;
  12 __u32 bench_pid = 0;
  13
  14 struct storage {
  15         __u8 data[64];
  16 };
  17
  18 struct {
  19         __uint(type, BPF_MAP_TYPE_SK_STORAGE);
  20         __uint(map_flags, BPF_F_NO_PREALLOC);
  21         __type(key, int);
  22         __type(value, struct storage);
  23 } sk_storage_map SEC(".maps");
  24
  25 struct {
  26         __uint(type, BPF_MAP_TYPE_TASK_STORAGE);
  27         __uint(map_flags, BPF_F_NO_PREALLOC);
  28         __type(key, int);
  29         __type(value, struct storage);
  30 } task_storage_map SEC(".maps");
  31
  32 SEC("raw_tp/kmalloc")
  33 int BPF_PROG(kmalloc, unsigned long call_site, const void *ptr,
  34              size_t bytes_req, size_t bytes_alloc, gfp_t gfp_flags,
  35              int node)
  36 {
  37         __sync_fetch_and_add(&kmalloc_cnts, 1);
  38
  39         return 0;
  40 }
  41
  42 SEC("tp_btf/sched_process_fork")
  43 int BPF_PROG(sched_process_fork, struct task_struct *parent, struct task_struct *child)
  44 {
  45         struct storage *stg;
  46
  47         if (parent->tgid != bench_pid)
  48                 return 0;
  49
  50         stg = bpf_task_storage_get(&task_storage_map, child, NULL,
  51                                    BPF_LOCAL_STORAGE_GET_F_CREATE);
  52         if (stg)
  53                 __sync_fetch_and_add(&create_cnts, 1);
  54         else
  55                 __sync_fetch_and_add(&create_errs, 1);
  56
  57         return 0;
  58 }
  59
  60 SEC("lsm.s/socket_post_create")
  61 int BPF_PROG(socket_post_create, struct socket *sock, int family, int type,
  62              int protocol, int kern)
  63 {
  64         struct sock *sk = sock->sk;
  65         struct storage *stg;
  66         __u32 pid;
  67
  68         pid = bpf_get_current_pid_tgid() >> 32;
  69         if (pid != bench_pid || !sk)
  70                 return 0;
  71
  72         stg = bpf_sk_storage_get(&sk_storage_map, sk, NULL,
  73                                  BPF_LOCAL_STORAGE_GET_F_CREATE);
  74
  75         if (stg)
  76                 __sync_fetch_and_add(&create_cnts, 1);
  77         else
  78                 __sync_fetch_and_add(&create_errs, 1);
  79
  80         return 0;
  81 }
  82
  83 char __license[] SEC("license") = "GPL";