diff mbox series

[RFC,net-next,2/6] net: xdp: report flags program was installed with on query

Message ID 20171124023613.16855-3-jakub.kicinski@netronome.com
State RFC, archived
Delegated to: BPF Maintainers
Headers show
Series xdp: make stack perform remove and tests | expand

Commit Message

Jakub Kicinski Nov. 24, 2017, 2:36 a.m. UTC 
Some drivers enforce that flags on program replacement and
removal must match the flags passed on install.  This leaves
the possibility open to enable simultaneous loading
of XDP programs both to HW and DRV.

Allow such drivers to report the flags back to the stack.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Simon Horman <simon.horman@netronome.com>
---
 drivers/net/ethernet/netronome/nfp/nfp_net_common.c | 1 +
 include/linux/netdevice.h                           | 2 ++
 2 files changed, 3 insertions(+)
diff mbox series

Patch

diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c
index 1a603fdd9e80..ea6bbf1efefc 100644
--- a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c
+++ b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c
@@ -3392,6 +3392,7 @@  static int nfp_net_xdp(struct net_device *netdev, struct netdev_bpf *xdp)
 		if (nn->dp.bpf_offload_xdp)
 			xdp->prog_attached = XDP_ATTACHED_HW;
 		xdp->prog_id = nn->xdp_prog ? nn->xdp_prog->aux->id : 0;
+		xdp->flags = nn->xdp_prog ? nn->xdp_flags : 0;
 		return 0;
 	case BPF_OFFLOAD_VERIFIER_PREP:
 		return nfp_app_bpf_verifier_prep(nn->app, nn, xdp);
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 667bdd3ad33e..cc4ce7456e38 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -820,6 +820,8 @@  struct netdev_bpf {
 		struct {
 			u8 prog_attached;
 			u32 prog_id;
+			/* flags with which program was installed */
+			u32 prog_flags;
 		};
 		/* BPF_OFFLOAD_VERIFIER_PREP */
 		struct {