diff options
Diffstat (limited to 'include/xen/interface/io/netif.h')
| -rw-r--r-- | include/xen/interface/io/netif.h | 39 |
1 files changed, 20 insertions, 19 deletions
diff --git a/include/xen/interface/io/netif.h b/include/xen/interface/io/netif.h index 4f20dbc42910..cb0c1a25d5d4 100644 --- a/include/xen/interface/io/netif.h +++ b/include/xen/interface/io/netif.h @@ -1,26 +1,9 @@ +/* SPDX-License-Identifier: MIT */ /****************************************************************************** * xen_netif.h * * Unified network-device I/O interface for Xen guest OSes. * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to - * deal in the Software without restriction, including without limitation the - * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or - * sell copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in - * all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE - * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING - * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER - * DEALINGS IN THE SOFTWARE. - * * Copyright (c) 2003-2004, Keir Fraser */ @@ -161,6 +144,19 @@ */ /* + * "xdp-headroom" is used to request that extra space is added + * for XDP processing. The value is measured in bytes and passed by + * the frontend to be consistent between both ends. + * If the value is greater than zero that means that + * an RX response is going to be passed to an XDP program for processing. + * XEN_NETIF_MAX_XDP_HEADROOM defines the maximum headroom offset in bytes + * + * "feature-xdp-headroom" is set to "1" by the netback side like other features + * so a guest can check if an XDP program can be processed. + */ +#define XEN_NETIF_MAX_XDP_HEADROOM 0x7FFF + +/* * Control ring * ============ * @@ -846,7 +842,8 @@ struct xen_netif_tx_request { #define XEN_NETIF_EXTRA_TYPE_MCAST_ADD (2) /* u.mcast */ #define XEN_NETIF_EXTRA_TYPE_MCAST_DEL (3) /* u.mcast */ #define XEN_NETIF_EXTRA_TYPE_HASH (4) /* u.hash */ -#define XEN_NETIF_EXTRA_TYPE_MAX (5) +#define XEN_NETIF_EXTRA_TYPE_XDP (5) /* u.xdp */ +#define XEN_NETIF_EXTRA_TYPE_MAX (6) /* xen_netif_extra_info_t flags. */ #define _XEN_NETIF_EXTRA_FLAG_MORE (0) @@ -879,6 +876,10 @@ struct xen_netif_extra_info { uint8_t algorithm; uint8_t value[4]; } hash; + struct { + uint16_t headroom; + uint16_t pad[2]; + } xdp; uint16_t pad[3]; } u; }; |