@@ -3986,6 +3986,9 @@ struct bpf_link_info {
__u32 netns_ino;
__u32 attach_type;
} netns;
+ struct {
+ __u32 ifindex;
+ } xdp;
};
} __attribute__((aligned(8)));
@@ -8990,6 +8990,35 @@ static void bpf_xdp_link_dealloc(struct bpf_link *link)
kfree(xdp_link);
}
+static void bpf_xdp_link_show_fdinfo(const struct bpf_link *link,
+ struct seq_file *seq)
+{
+ struct bpf_xdp_link *xdp_link = container_of(link, struct bpf_xdp_link, link);
+ u32 ifindex = 0;
+
+ rtnl_lock();
+ if (xdp_link->dev)
+ ifindex = xdp_link->dev->ifindex;
+ rtnl_unlock();
+
+ seq_printf(seq, "ifindex:\t%u\n", ifindex);
+}
+
+static int bpf_xdp_link_fill_link_info(const struct bpf_link *link,
+ struct bpf_link_info *info)
+{
+ struct bpf_xdp_link *xdp_link = container_of(link, struct bpf_xdp_link, link);
+ u32 ifindex = 0;
+
+ rtnl_lock();
+ if (xdp_link->dev)
+ ifindex = xdp_link->dev->ifindex;
+ rtnl_unlock();
+
+ info->xdp.ifindex = ifindex;
+ return 0;
+}
+
static int bpf_xdp_link_update(struct bpf_link *link, struct bpf_prog *new_prog,
struct bpf_prog *old_prog)
{
@@ -9035,6 +9064,8 @@ static int bpf_xdp_link_update(struct bpf_link *link, struct bpf_prog *new_prog,
static const struct bpf_link_ops bpf_xdp_link_lops = {
.release = bpf_xdp_link_release,
.dealloc = bpf_xdp_link_dealloc,
+ .show_fdinfo = bpf_xdp_link_show_fdinfo,
+ .fill_link_info = bpf_xdp_link_fill_link_info,
.update_prog = bpf_xdp_link_update,
};
Implement XDP link-specific show_fdinfo and link_info to emit ifindex. Signed-off-by: Andrii Nakryiko <andriin@fb.com> --- include/uapi/linux/bpf.h | 3 +++ net/core/dev.c | 31 +++++++++++++++++++++++++++++++ 2 files changed, 34 insertions(+)