[PATCH RFC bpf-next 2/7] bpf: export bpf_link functions for modules

[Kumar Kartikeya Dwivedi <memxor@gmail.com>]

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@gmail.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