bpf: report offload info to user space

Extend struct bpf_prog_info to contain information about program
being bound to a device.  Since the netdev may get destroyed while
program still exists we need a flag to indicate the program is
loaded for a device, even if the device is gone.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Simon Horman <simon.horman@netronome.com>
Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 6 insertions, 0 deletions

diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h
index 80d191a93fb0..4455dd195201 100644
--- a/include/uapi/linux/bpf.h
+++ b/include/uapi/linux/bpf.h
@@ -895,6 +895,10 @@ enum sk_action {
 
 #define BPF_TAG_SIZE    8
 
+enum bpf_prog_status {
+        BPF_PROG_STATUS_DEV_BOUND       = (1 << 0),
+};
+
 struct bpf_prog_info {
         __u32 type;
         __u32 id;
@@ -908,6 +912,8 @@ struct bpf_prog_info {
         __u32 nr_map_ids;
         __aligned_u64 map_ids;
         char name[BPF_OBJ_NAME_LEN];
+        __u32 ifindex;
+        __u32 status;
 } __attribute__((aligned(8)));
 
 struct bpf_map_info {