diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net.h b/drivers/net/ethernet/netronome/nfp/nfp_net.h index 2a71a9ffd095a87e19c4546fc0838dafd7cbb28e..2021dda595b725e8fd26ac8f32b0a59af662907b 100644 --- a/drivers/net/ethernet/netronome/nfp/nfp_net.h +++ b/drivers/net/ethernet/netronome/nfp/nfp_net.h @@ -553,8 +553,7 @@ struct nfp_net_dp { * @rss_cfg: RSS configuration * @rss_key: RSS secret key * @rss_itbl: RSS indirection table - * @xdp_flags: Flags with which XDP prog was loaded - * @xdp_prog: XDP prog (for ctrl path, both DRV and HW modes) + * @xdp: Information about the attached XDP program * @max_r_vecs: Number of allocated interrupt vectors for RX/TX * @max_tx_rings: Maximum number of TX rings supported by the Firmware * @max_rx_rings: Maximum number of RX rings supported by the Firmware @@ -610,8 +609,7 @@ struct nfp_net { u8 rss_key[NFP_NET_CFG_RSS_KEY_SZ]; u8 rss_itbl[NFP_NET_CFG_RSS_ITBL_SZ]; - u32 xdp_flags; - struct bpf_prog *xdp_prog; + struct xdp_attachment_info xdp; unsigned int max_tx_rings; unsigned int max_rx_rings; diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c index d207145986137aa17968c9bda56bee71f5ce03fe..4bb589dbffbcce07e0e0afb58577e1db5fd3d9da 100644 --- a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c +++ b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c @@ -3417,34 +3417,29 @@ nfp_net_xdp_setup_drv(struct nfp_net *nn, struct bpf_prog *prog, return nfp_net_ring_reconfig(nn, dp, extack); } -static int -nfp_net_xdp_setup(struct nfp_net *nn, struct bpf_prog *prog, u32 flags, - struct netlink_ext_ack *extack) +static int nfp_net_xdp_setup(struct nfp_net *nn, struct netdev_bpf *bpf) { struct bpf_prog *drv_prog, *offload_prog; int err; - if (nn->xdp_prog && (flags ^ nn->xdp_flags) & XDP_FLAGS_MODES) + if (!xdp_attachment_flags_ok(&nn->xdp, bpf)) return -EBUSY; /* Load both when no flags set to allow easy activation of driver path * when program is replaced by one which can't be offloaded. */ - drv_prog = flags & XDP_FLAGS_HW_MODE ? NULL : prog; - offload_prog = flags & XDP_FLAGS_DRV_MODE ? NULL : prog; + drv_prog = bpf->flags & XDP_FLAGS_HW_MODE ? NULL : bpf->prog; + offload_prog = bpf->flags & XDP_FLAGS_DRV_MODE ? NULL : bpf->prog; - err = nfp_net_xdp_setup_drv(nn, drv_prog, extack); + err = nfp_net_xdp_setup_drv(nn, drv_prog, bpf->extack); if (err) return err; - err = nfp_app_xdp_offload(nn->app, nn, offload_prog, extack); - if (err && flags & XDP_FLAGS_HW_MODE) + err = nfp_app_xdp_offload(nn->app, nn, offload_prog, bpf->extack); + if (err && bpf->flags & XDP_FLAGS_HW_MODE) return err; - if (nn->xdp_prog) - bpf_prog_put(nn->xdp_prog); - nn->xdp_prog = prog; - nn->xdp_flags = flags; + xdp_attachment_setup(&nn->xdp, bpf); return 0; } @@ -3456,12 +3451,9 @@ static int nfp_net_xdp(struct net_device *netdev, struct netdev_bpf *xdp) switch (xdp->command) { case XDP_SETUP_PROG: case XDP_SETUP_PROG_HW: - return nfp_net_xdp_setup(nn, xdp->prog, xdp->flags, - xdp->extack); + return nfp_net_xdp_setup(nn, xdp); case XDP_QUERY_PROG: - xdp->prog_id = nn->xdp_prog ? nn->xdp_prog->aux->id : 0; - xdp->prog_flags = nn->xdp_prog ? nn->xdp_flags : 0; - return 0; + return xdp_attachment_query(&nn->xdp, xdp); default: return nfp_app_bpf(nn->app, nn, xdp); } diff --git a/drivers/net/netdevsim/bpf.c b/drivers/net/netdevsim/bpf.c index 712e6f918065f23154eff923de865c5f0762e8ee..c485d97b5df44834c9f2ddd49ea41d04939bc99d 100644 --- a/drivers/net/netdevsim/bpf.c +++ b/drivers/net/netdevsim/bpf.c @@ -199,10 +199,8 @@ static int nsim_xdp_set_prog(struct netdevsim *ns, struct netdev_bpf *bpf) { int err; - if (ns->xdp_prog && (bpf->flags ^ ns->xdp_flags) & XDP_FLAGS_MODES) { - NSIM_EA(bpf->extack, "program loaded with different flags"); + if (!xdp_attachment_flags_ok(&ns->xdp, bpf)) return -EBUSY; - } if (bpf->command == XDP_SETUP_PROG && !ns->bpf_xdpdrv_accept) { NSIM_EA(bpf->extack, "driver XDP disabled in DebugFS"); @@ -219,11 +217,7 @@ static int nsim_xdp_set_prog(struct netdevsim *ns, struct netdev_bpf *bpf) return err; } - if (ns->xdp_prog) - bpf_prog_put(ns->xdp_prog); - - ns->xdp_prog = bpf->prog; - ns->xdp_flags = bpf->flags; + xdp_attachment_setup(&ns->xdp, bpf); if (!bpf->prog) ns->xdp_prog_mode = XDP_ATTACHED_NONE; @@ -567,9 +561,7 @@ int nsim_bpf(struct net_device *dev, struct netdev_bpf *bpf) nsim_bpf_destroy_prog(bpf->offload.prog); return 0; case XDP_QUERY_PROG: - bpf->prog_id = ns->xdp_prog ? ns->xdp_prog->aux->id : 0; - bpf->prog_flags = ns->xdp_prog ? ns->xdp_flags : 0; - return 0; + return xdp_attachment_query(&ns->xdp, bpf); case XDP_SETUP_PROG: err = nsim_setup_prog_checks(ns, bpf); if (err) @@ -636,6 +628,6 @@ void nsim_bpf_uninit(struct netdevsim *ns) { WARN_ON(!list_empty(&ns->bpf_bound_progs)); WARN_ON(!list_empty(&ns->bpf_bound_maps)); - WARN_ON(ns->xdp_prog); + WARN_ON(ns->xdp.prog); WARN_ON(ns->bpf_offloaded); } diff --git a/drivers/net/netdevsim/netdevsim.h b/drivers/net/netdevsim/netdevsim.h index d8a7cc995e8858cb7b0e80284a7e294fc20db7b7..69ffb4a2d14b7061526444aa9d9c791b74d4b29d 100644 --- a/drivers/net/netdevsim/netdevsim.h +++ b/drivers/net/netdevsim/netdevsim.h @@ -18,6 +18,7 @@ #include #include #include +#include #define DRV_NAME "netdevsim" @@ -67,9 +68,8 @@ struct netdevsim { struct bpf_prog *bpf_offloaded; u32 bpf_offloaded_id; - u32 xdp_flags; + struct xdp_attachment_info xdp; int xdp_prog_mode; - struct bpf_prog *xdp_prog; u32 prog_id_gen; diff --git a/include/net/xdp.h b/include/net/xdp.h index 2deea7166a3486f66a2fd954acc3fcfe2b9d6440..fcb033f51d8c3d00945e3ad6e42d9128fb8bf9d2 100644 --- a/include/net/xdp.h +++ b/include/net/xdp.h @@ -144,4 +144,17 @@ xdp_data_meta_unsupported(const struct xdp_buff *xdp) return unlikely(xdp->data_meta > xdp->data); } +struct xdp_attachment_info { + struct bpf_prog *prog; + u32 flags; +}; + +struct netdev_bpf; +int xdp_attachment_query(struct xdp_attachment_info *info, + struct netdev_bpf *bpf); +bool xdp_attachment_flags_ok(struct xdp_attachment_info *info, + struct netdev_bpf *bpf); +void xdp_attachment_setup(struct xdp_attachment_info *info, + struct netdev_bpf *bpf); + #endif /* __LINUX_NET_XDP_H__ */ diff --git a/net/core/xdp.c b/net/core/xdp.c index 31c58719b5a9a90514d04fd6bee4d80e4e464d9f..57285383ed00c9b3ab7616f4adddfca0d525f850 100644 --- a/net/core/xdp.c +++ b/net/core/xdp.c @@ -3,8 +3,11 @@ * Copyright (c) 2017 Jesper Dangaard Brouer, Red Hat Inc. * Released under terms in GPL version 2. See COPYING. */ +#include +#include #include #include +#include #include #include #include @@ -370,3 +373,34 @@ void xdp_return_buff(struct xdp_buff *xdp) __xdp_return(xdp->data, &xdp->rxq->mem, true, xdp->handle); } EXPORT_SYMBOL_GPL(xdp_return_buff); + +int xdp_attachment_query(struct xdp_attachment_info *info, + struct netdev_bpf *bpf) +{ + bpf->prog_id = info->prog ? info->prog->aux->id : 0; + bpf->prog_flags = info->prog ? info->flags : 0; + return 0; +} +EXPORT_SYMBOL_GPL(xdp_attachment_query); + +bool xdp_attachment_flags_ok(struct xdp_attachment_info *info, + struct netdev_bpf *bpf) +{ + if (info->prog && (bpf->flags ^ info->flags) & XDP_FLAGS_MODES) { + NL_SET_ERR_MSG(bpf->extack, + "program loaded with different flags"); + return false; + } + return true; +} +EXPORT_SYMBOL_GPL(xdp_attachment_flags_ok); + +void xdp_attachment_setup(struct xdp_attachment_info *info, + struct netdev_bpf *bpf) +{ + if (info->prog) + bpf_prog_put(info->prog); + info->prog = bpf->prog; + info->flags = bpf->flags; +} +EXPORT_SYMBOL_GPL(xdp_attachment_setup); diff --git a/tools/testing/selftests/bpf/test_offload.py b/tools/testing/selftests/bpf/test_offload.py index f8d9bd81d9a4f99c9e5f8d670ef9c978416b0494..40401e9e9351b6855c662af71e48531bad891847 100755 --- a/tools/testing/selftests/bpf/test_offload.py +++ b/tools/testing/selftests/bpf/test_offload.py @@ -821,7 +821,7 @@ try: ret, _, err = sim.set_xdp(obj, "", force=True, fail=False, include_stderr=True) fail(ret == 0, "Replaced XDP program with a program in different mode") - check_extack_nsim(err, "program loaded with different flags.", args) + check_extack(err, "program loaded with different flags.", args) start_test("Test XDP prog remove with bad flags...") ret, _, err = sim.unset_xdp("offload", force=True, @@ -831,7 +831,7 @@ try: ret, _, err = sim.unset_xdp("", force=True, fail=False, include_stderr=True) fail(ret == 0, "Removed program with a bad mode") - check_extack_nsim(err, "program loaded with different flags.", args) + check_extack(err, "program loaded with different flags.", args) start_test("Test MTU restrictions...") ret, _ = sim.set_mtu(9000, fail=False)