xdp: allow attaching programs loaded for specific device
Pass the netdev pointer to bpf_prog_get_type(). This way
BPF code can decide whether the device matches what the
code was loaded/translated for.
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>
diff --git a/net/core/dev.c b/net/core/dev.c
index 10cde58..30b5fe3 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -7157,7 +7157,11 @@ int dev_change_xdp_fd(struct net_device *dev, struct netlink_ext_ack *extack,
__dev_xdp_attached(dev, bpf_op, NULL))
return -EBUSY;
- prog = bpf_prog_get_type(fd, BPF_PROG_TYPE_XDP);
+ if (bpf_op == ops->ndo_bpf)
+ prog = bpf_prog_get_type_dev(fd, BPF_PROG_TYPE_XDP,
+ dev);
+ else
+ prog = bpf_prog_get_type(fd, BPF_PROG_TYPE_XDP);
if (IS_ERR(prog))
return PTR_ERR(prog);
}