From: Iago López Galeiras <iagol@microsoft.com>
Date: Mon, 12 Jul 2021 10:18:31 +0000 (+0200)
Subject: shared/bpf-dlopen: expose more libbpf functions
X-Git-Tag: v250-rc1~561^2~11
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=510cdbeb5ba841c9e9d9fa62303ecb2673b77b9e;p=thirdparty%2Fsystemd.git

shared/bpf-dlopen: expose more libbpf functions

They're needed for the LSM BPF feature.
---

diff --git a/src/shared/bpf-dlopen.c b/src/shared/bpf-dlopen.c
index 45ab986ab25..6f82002ff83 100644
--- a/src/shared/bpf-dlopen.c
+++ b/src/shared/bpf-dlopen.c
@@ -8,13 +8,17 @@
 static void *bpf_dl = NULL;
 
 struct bpf_link* (*sym_bpf_program__attach_cgroup)(struct bpf_program *, int);
+struct bpf_link* (*sym_bpf_program__attach_lsm)(struct bpf_program *);
 long (*sym_libbpf_get_error)(const void *);
 int (*sym_bpf_link__fd)(const struct bpf_link *);
 int (*sym_bpf_link__destroy)(struct bpf_link *);
 int (*sym_bpf_map__fd)(const struct bpf_map *);
 const char* (*sym_bpf_map__name)(const struct bpf_map *);
+int (*sym_bpf_create_map)(enum bpf_map_type,  int key_size, int value_size, int max_entries, __u32 map_flags);
 int (*sym_bpf_map__resize)(struct bpf_map *, __u32);
 int (*sym_bpf_map_update_elem)(int, const void *, const void *, __u64);
+int (*sym_bpf_map_delete_elem)(int, const void *);
+int (*sym_bpf_map__set_inner_map_fd)(struct bpf_map *, int);
 int (*sym_bpf_object__open_skeleton)(struct bpf_object_skeleton *, const struct bpf_object_open_opts *);
 int (*sym_bpf_object__load_skeleton)(struct bpf_object_skeleton *);
 int (*sym_bpf_object__attach_skeleton)(struct bpf_object_skeleton *);
@@ -30,8 +34,11 @@ int dlopen_bpf(void) {
                         DLSYM_ARG(bpf_link__fd),
                         DLSYM_ARG(bpf_map__fd),
                         DLSYM_ARG(bpf_map__name),
+                        DLSYM_ARG(bpf_create_map),
                         DLSYM_ARG(bpf_map__resize),
                         DLSYM_ARG(bpf_map_update_elem),
+                        DLSYM_ARG(bpf_map_delete_elem),
+                        DLSYM_ARG(bpf_map__set_inner_map_fd),
                         DLSYM_ARG(bpf_object__open_skeleton),
                         DLSYM_ARG(bpf_object__load_skeleton),
                         DLSYM_ARG(bpf_object__attach_skeleton),
@@ -39,6 +46,7 @@ int dlopen_bpf(void) {
                         DLSYM_ARG(bpf_object__destroy_skeleton),
                         DLSYM_ARG(bpf_probe_prog_type),
                         DLSYM_ARG(bpf_program__attach_cgroup),
+                        DLSYM_ARG(bpf_program__attach_lsm),
                         DLSYM_ARG(bpf_program__name),
                         DLSYM_ARG(libbpf_get_error));
 }
diff --git a/src/shared/bpf-dlopen.h b/src/shared/bpf-dlopen.h
index fbb5531aff2..713c41c3f40 100644
--- a/src/shared/bpf-dlopen.h
+++ b/src/shared/bpf-dlopen.h
@@ -7,13 +7,17 @@
 #include <bpf/libbpf.h>
 
 extern struct bpf_link* (*sym_bpf_program__attach_cgroup)(struct bpf_program *, int);
+extern struct bpf_link* (*sym_bpf_program__attach_lsm)(struct bpf_program *);
 extern long (*sym_libbpf_get_error)(const void *);
 extern int (*sym_bpf_link__fd)(const struct bpf_link *);
 extern int (*sym_bpf_link__destroy)(struct bpf_link *);
 extern int (*sym_bpf_map__fd)(const struct bpf_map *);
 extern const char* (*sym_bpf_map__name)(const struct bpf_map *);
+extern int (*sym_bpf_create_map)(enum bpf_map_type, int key_size, int value_size, int max_entries, __u32 map_flags);
 extern int (*sym_bpf_map__resize)(struct bpf_map *, __u32);
 extern int (*sym_bpf_map_update_elem)(int, const void *, const void *, __u64);
+extern int (*sym_bpf_map_delete_elem)(int, const void *);
+extern int (*sym_bpf_map__set_inner_map_fd)(struct bpf_map *, int);
 /* The *_skeleton APIs are autogenerated by bpftool, the targets can be found
  * in ./build/src/core/bpf/socket_bind/socket-bind.skel.h */
 extern int (*sym_bpf_object__open_skeleton)(struct bpf_object_skeleton *, const struct bpf_object_open_opts *);