netdev - [PATCH bpf-next 3/8] tools: libbpf: allow setting ifindex for programs and maps

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Message-Id: <20180628214142.11268-4-jakub.kicinski@netronome.com>
Date:   Thu, 28 Jun 2018 14:41:37 -0700
From:   Jakub Kicinski <jakub.kicinski@...ronome.com>
To:     alexei.starovoitov@...il.com, daniel@...earbox.net
Cc:     oss-drivers@...ronome.com, netdev@...r.kernel.org,
        Jakub Kicinski <jakub.kicinski@...ronome.com>
Subject: [PATCH bpf-next 3/8] tools: libbpf: allow setting ifindex for programs and maps

Users of bpf_object__open()/bpf_object__load() APIs may want to
load the programs and maps onto a device for offload.  Allow
setting ifindex on those sub-objects.

Signed-off-by: Jakub Kicinski <jakub.kicinski@...ronome.com>
Reviewed-by: Quentin Monnet <quentin.monnet@...ronome.com>
---
 tools/lib/bpf/libbpf.c | 10 ++++++++++
 tools/lib/bpf/libbpf.h |  2 ++
 2 files changed, 12 insertions(+)

diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index a1491e95edd0..7bc02d93e277 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -1896,6 +1896,11 @@ void *bpf_program__priv(struct bpf_program *prog)
 	return prog ? prog->priv : ERR_PTR(-EINVAL);
 }
 
+void bpf_program__set_ifindex(struct bpf_program *prog, __u32 ifindex)
+{
+	prog->prog_ifindex = ifindex;
+}
+
 const char *bpf_program__title(struct bpf_program *prog, bool needs_copy)
 {
 	const char *title;
@@ -2122,6 +2127,11 @@ void *bpf_map__priv(struct bpf_map *map)
 	return map ? map->priv : ERR_PTR(-EINVAL);
 }
 
+void bpf_map__set_ifindex(struct bpf_map *map, __u32 ifindex)
+{
+	map->map_ifindex = ifindex;
+}
+
 struct bpf_map *
 bpf_map__next(struct bpf_map *prev, struct bpf_object *obj)
 {
diff --git a/tools/lib/bpf/libbpf.h b/tools/lib/bpf/libbpf.h
index 09976531aa74..564f4be9bae0 100644
--- a/tools/lib/bpf/libbpf.h
+++ b/tools/lib/bpf/libbpf.h
@@ -109,6 +109,7 @@ int bpf_program__set_priv(struct bpf_program *prog, void *priv,
 			  bpf_program_clear_priv_t clear_priv);
 
 void *bpf_program__priv(struct bpf_program *prog);
+void bpf_program__set_ifindex(struct bpf_program *prog, __u32 ifindex);
 
 const char *bpf_program__title(struct bpf_program *prog, bool needs_copy);
 
@@ -251,6 +252,7 @@ typedef void (*bpf_map_clear_priv_t)(struct bpf_map *, void *);
 int bpf_map__set_priv(struct bpf_map *map, void *priv,
 		      bpf_map_clear_priv_t clear_priv);
 void *bpf_map__priv(struct bpf_map *map);
+void bpf_map__set_ifindex(struct bpf_map *map, __u32 ifindex);
 int bpf_map__pin(struct bpf_map *map, const char *path);
 
 long libbpf_get_error(const void *ptr);
-- 
2.17.1