netdev - [PATCH RFC bpf-next 2/7] bpf: export bpf

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Message-Id: <20210528195946.2375109-3-memxor@gmail.com>
Date:   Sat, 29 May 2021 01:29:41 +0530
From:   Kumar Kartikeya Dwivedi <memxor@...il.com>
To:     bpf@...r.kernel.org
Cc:     Kumar Kartikeya Dwivedi <memxor@...il.com>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andrii@...nel.org>,
        Martin KaFai Lau <kafai@...com>,
        Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
        John Fastabend <john.fastabend@...il.com>,
        KP Singh <kpsingh@...nel.org>,
        Jamal Hadi Salim <jhs@...atatu.com>,
        Vlad Buslov <vladbu@...dia.com>,
        Cong Wang <xiyou.wangcong@...il.com>,
        Jiri Pirko <jiri@...nulli.us>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>, Joe Stringer <joe@...ium.io>,
        Quentin Monnet <quentin@...valent.com>,
        Jesper Dangaard Brouer <brouer@...hat.com>,
        Toke Høiland-Jørgensen <toke@...hat.com>,
        netdev@...r.kernel.org
Subject: [PATCH RFC bpf-next 2/7] bpf: export bpf_link functions for modules

These are required in a subsequent patch to implement the bpf_link
command for cls_bpf. Since the bpf_link object is tied to the
cls_bpf_prog object, it has to be initialized and managed from inside
the module.

Signed-off-by: Kumar Kartikeya Dwivedi <memxor@...il.com>
---
 kernel/bpf/syscall.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c
index 50457019da27..e5934b748ced 100644
--- a/kernel/bpf/syscall.c
+++ b/kernel/bpf/syscall.c
@@ -2338,6 +2338,7 @@ void bpf_link_init(struct bpf_link *link, enum bpf_link_type type,
 	link->ops = ops;
 	link->prog = prog;
 }
+EXPORT_SYMBOL_GPL(bpf_link_init);
 
 static void bpf_link_free_id(int id)
 {
@@ -2363,6 +2364,7 @@ void bpf_link_cleanup(struct bpf_link_primer *primer)
 	fput(primer->file);
 	put_unused_fd(primer->fd);
 }
+EXPORT_SYMBOL_GPL(bpf_link_cleanup);
 
 void bpf_link_inc(struct bpf_link *link)
 {
@@ -2510,6 +2512,7 @@ int bpf_link_prime(struct bpf_link *link, struct bpf_link_primer *primer)
 	primer->id = id;
 	return 0;
 }
+EXPORT_SYMBOL_GPL(bpf_link_prime);
 
 int bpf_link_settle(struct bpf_link_primer *primer)
 {
@@ -2522,6 +2525,7 @@ int bpf_link_settle(struct bpf_link_primer *primer)
 	/* pass through installed FD */
 	return primer->fd;
 }
+EXPORT_SYMBOL_GPL(bpf_link_settle);
 
 int bpf_link_new_fd(struct bpf_link *link)
 {
-- 
2.31.1