Commit 8dc80551 authored by Daniel T. Lee's avatar Daniel T. Lee Committed by Alexei Starovoitov
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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: default avatarDaniel T. Lee <danieltimlee@gmail.com>
Link: https://lore.kernel.org/r/20230818090119.477441-9-danieltimlee@gmail.com


Signed-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
parent d93a7cf6

samples/bpf/test_map_in_map.bpf.c

+3 −7
Original line number Diff line number Diff line
@@ -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;