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| author | Denis Kirjanov <kda@linux-powerpc.org> | 2020-06-29 16:13:27 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-07-01 15:25:14 -0700 |
| commit | 2cef30d7bd8b8fbddeb74e3753c29d4248c094e0 (patch) | |
| tree | 12620172d2386f722a680c03f74b5a1203cb991e /include/xen | |
| parent | 6d79dc6765e4298aeeab4c22785c1c7a1c754188 (diff) | |
| download | linux-2cef30d7bd8b8fbddeb74e3753c29d4248c094e0.tar.gz linux-2cef30d7bd8b8fbddeb74e3753c29d4248c094e0.tar.bz2 linux-2cef30d7bd8b8fbddeb74e3753c29d4248c094e0.zip | |
xen: netif.h: add a new extra type for XDP
The patch adds a new extra type to be able to diffirentiate
between RX responses on xen-netfront side with the adjusted offset
required for XDP processing.
The offset value from a guest is passed via xenstore.
Signed-off-by: Denis Kirjanov <kda@linux-powerpc.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/xen')
| -rw-r--r-- | include/xen/interface/io/netif.h | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/include/xen/interface/io/netif.h b/include/xen/interface/io/netif.h index 4f20dbc42910..2194322c3c7f 100644 --- a/include/xen/interface/io/netif.h +++ b/include/xen/interface/io/netif.h @@ -161,6 +161,19 @@ */ /* + * "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 +859,8 @@ 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 +893,10 @@ 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; }; |