From: Daniel T. Lee Date: Fri, 18 Aug 2023 09:01:18 +0000 (+0900) Subject: samples/bpf: refactor syscall tracing programs using BPF_KSYSCALL macro X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=8dc80551463197ec79ce0966ec2b5bd700042614;p=tomoyo%2Ftomoyo-test1.git samples/bpf: refactor syscall tracing programs using BPF_KSYSCALL macro This commit refactors the syscall tracing programs by adopting the BPF_KSYSCALL macro. This change aims to enhance the clarity and simplicity of the BPF programs by reducing the complexity of argument parsing from pt_regs. Signed-off-by: Daniel T. Lee Link: https://lore.kernel.org/r/20230818090119.477441-9-danieltimlee@gmail.com Signed-off-by: Alexei Starovoitov --- diff --git a/samples/bpf/test_map_in_map.bpf.c b/samples/bpf/test_map_in_map.bpf.c index 1883559e5977..9f030f9c4e1b 100644 --- a/samples/bpf/test_map_in_map.bpf.c +++ b/samples/bpf/test_map_in_map.bpf.c @@ -103,19 +103,15 @@ static __always_inline int do_inline_hash_lookup(void *inner_map, u32 port) return result ? *result : -ENOENT; } -SEC("kprobe/__sys_connect") -int trace_sys_connect(struct pt_regs *ctx) +SEC("ksyscall/connect") +int BPF_KSYSCALL(trace_sys_connect, unsigned int fd, struct sockaddr_in6 *in6, int addrlen) { - struct sockaddr_in6 *in6; u16 test_case, port, dst6[8]; - int addrlen, ret, inline_ret, ret_key = 0; + int ret, inline_ret, ret_key = 0; u32 port_key; void *outer_map, *inner_map; bool inline_hash = false; - in6 = (struct sockaddr_in6 *)PT_REGS_PARM2_CORE(ctx); - addrlen = (int)PT_REGS_PARM3_CORE(ctx); - if (addrlen != sizeof(*in6)) return 0;