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net: xdp: report flags program was installed with on query

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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>
Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
This commit is contained in:
Jakub Kicinski 2017-12-01 15:08:56 -08:00 committed by Daniel Borkmann
parent 118b4aa25d
commit 92f0292b35
2 changed files with 3 additions and 0 deletions
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1
drivers/net/ethernet/netronome/nfp/nfp_net_common.c
View file

@ -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);

2
include/linux/netdevice.h
View file

@ -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 {