linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Florent Revest <revest@chromium.org>
To: bpf@vger.kernel.org
Cc: ast@kernel.org, daniel@iogearbox.net, andrii@kernel.org,
	kpsingh@chromium.org, revest@google.com,
	linux-kernel@vger.kernel.org
Subject: [PATCH bpf-next 1/2] bpf: Expose bpf_get_socket_cookie to tracing programs
Date: Thu, 26 Nov 2020 18:02:11 +0100	[thread overview]
Message-ID: <20201126170212.1749137-1-revest@google.com> (raw)

This creates a new helper proto because the existing
bpf_get_socket_cookie_sock_proto has a ARG_PTR_TO_CTX argument and only
works for BPF programs where the context is a sock.

This helper could also be useful to other BPF program types such as LSM.

Signed-off-by: Florent Revest <revest@google.com>
---
 kernel/trace/bpf_trace.c | 4 ++++
 net/core/filter.c        | 7 +++++++
 2 files changed, 11 insertions(+)

diff --git a/kernel/trace/bpf_trace.c b/kernel/trace/bpf_trace.c
index d255bc9b2bfa..14ad96579813 100644
--- a/kernel/trace/bpf_trace.c
+++ b/kernel/trace/bpf_trace.c
@@ -1725,6 +1725,8 @@ raw_tp_prog_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog)
 	}
 }
 
+extern const struct bpf_func_proto bpf_get_socket_cookie_sock_tracing_proto;
+
 const struct bpf_func_proto *
 tracing_prog_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog)
 {
@@ -1748,6 +1750,8 @@ tracing_prog_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog)
 		return &bpf_sk_storage_get_tracing_proto;
 	case BPF_FUNC_sk_storage_delete:
 		return &bpf_sk_storage_delete_tracing_proto;
+	case BPF_FUNC_get_socket_cookie:
+		return &bpf_get_socket_cookie_sock_tracing_proto;
 #endif
 	case BPF_FUNC_seq_printf:
 		return prog->expected_attach_type == BPF_TRACE_ITER ?
diff --git a/net/core/filter.c b/net/core/filter.c
index 2ca5eecebacf..177c4e5e529d 100644
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -4631,6 +4631,13 @@ static const struct bpf_func_proto bpf_get_socket_cookie_sock_proto = {
 	.arg1_type	= ARG_PTR_TO_CTX,
 };
 
+const struct bpf_func_proto bpf_get_socket_cookie_sock_tracing_proto = {
+	.func		= bpf_get_socket_cookie_sock,
+	.gpl_only	= false,
+	.ret_type	= RET_INTEGER,
+	.arg1_type      = ARG_PTR_TO_BTF_ID_SOCK_COMMON,
+};
+
 BPF_CALL_1(bpf_get_socket_cookie_sock_ops, struct bpf_sock_ops_kern *, ctx)
 {
 	return __sock_gen_cookie(ctx->sk);
-- 
2.29.2.454.gaff20da3a2-goog


             reply	other threads:[~2020-11-26 17:02 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-11-26 17:02 Florent Revest [this message]
2020-11-26 17:02 ` [PATCH bpf-next 2/2] bpf: Add a selftest for the tracing bpf_get_socket_cookie Florent Revest
2020-11-27  7:56   ` Yonghong Song
2020-11-27  9:17     ` Florent Revest
2020-12-02  1:01   ` Andrii Nakryiko
2020-11-27  8:08 ` [PATCH bpf-next 1/2] bpf: Expose bpf_get_socket_cookie to tracing programs Yonghong Song

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20201126170212.1749137-1-revest@google.com \
    --to=revest@chromium.org \
    --cc=andrii@kernel.org \
    --cc=ast@kernel.org \
    --cc=bpf@vger.kernel.org \
    --cc=daniel@iogearbox.net \
    --cc=kpsingh@chromium.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=revest@google.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).