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 __u32 bench_pid = 0; 12 13 struct storage { 14 __u8 data[64]; 15 }; 16 17 struct { 18 __uint(type, BPF_MAP_TYPE_SK_STORAGE); 19 __uint(map_flags, BPF_F_NO_PREALLOC); 20 __type(key, int); 21 __type(value, struct storage); 22 } sk_storage_map SEC(".maps"); 23 24 struct { 25 __uint(type, BPF_MAP_TYPE_TASK_STORAGE); 26 __uint(map_flags, BPF_F_NO_PREALLOC); 27 __type(key, int); 28 __type(value, struct storage); 29 } task_storage_map SEC(".maps"); 30 31 SEC("tp_btf/sched_process_fork") 32 int BPF_PROG(sched_process_fork, struct task_struct *parent, struct task_struct *child) 33 { 34 struct storage *stg; 35 36 if (parent->tgid != bench_pid) 37 return 0; 38 39 stg = bpf_task_storage_get(&task_storage_map, child, NULL, 40 BPF_LOCAL_STORAGE_GET_F_CREATE); 41 if (stg) 42 __sync_fetch_and_add(&create_cnts, 1); 43 else 44 __sync_fetch_and_add(&create_errs, 1); 45 46 return 0; 47 } 48 49 SEC("lsm.s/socket_post_create") 50 int BPF_PROG(socket_post_create, struct socket *sock, int family, int type, 51 int protocol, int kern) 52 { 53 struct sock *sk = sock->sk; 54 struct storage *stg; 55 __u32 pid; 56 57 pid = bpf_get_current_pid_tgid() >> 32; 58 if (pid != bench_pid || !sk) 59 return 0; 60 61 stg = bpf_sk_storage_get(&sk_storage_map, sk, NULL, 62 BPF_LOCAL_STORAGE_GET_F_CREATE); 63 64 if (stg) 65 __sync_fetch_and_add(&create_cnts, 1); 66 else 67 __sync_fetch_and_add(&create_errs, 1); 68 69 return 0; 70 } 71 72 char __license[] SEC("license") = "GPL"; 73