2011-11-15 23:29:55 +08:00
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/*
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* Network device features.
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*
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#ifndef _LINUX_NETDEV_FEATURES_H
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#define _LINUX_NETDEV_FEATURES_H
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2011-11-15 23:29:55 +08:00
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#include <linux/types.h>
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2011-11-15 23:29:55 +08:00
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typedef u64 netdev_features_t;
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2011-11-15 23:29:55 +08:00
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2011-11-15 23:29:55 +08:00
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enum {
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NETIF_F_SG_BIT, /* Scatter/gather IO. */
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NETIF_F_IP_CSUM_BIT, /* Can checksum TCP/UDP over IPv4. */
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2011-11-15 23:29:55 +08:00
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__UNUSED_NETIF_F_1,
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2011-11-15 23:29:55 +08:00
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NETIF_F_HW_CSUM_BIT, /* Can checksum all the packets. */
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NETIF_F_IPV6_CSUM_BIT, /* Can checksum TCP/UDP over IPV6 */
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NETIF_F_HIGHDMA_BIT, /* Can DMA to high memory. */
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NETIF_F_FRAGLIST_BIT, /* Scatter/gather IO. */
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2013-04-19 10:04:27 +08:00
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NETIF_F_HW_VLAN_CTAG_TX_BIT, /* Transmit VLAN CTAG HW acceleration */
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NETIF_F_HW_VLAN_CTAG_RX_BIT, /* Receive VLAN CTAG HW acceleration */
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NETIF_F_HW_VLAN_CTAG_FILTER_BIT,/* Receive filtering on VLAN CTAGs */
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2011-11-15 23:29:55 +08:00
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NETIF_F_VLAN_CHALLENGED_BIT, /* Device cannot handle VLAN packets */
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NETIF_F_GSO_BIT, /* Enable software GSO. */
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NETIF_F_LLTX_BIT, /* LockLess TX - deprecated. Please */
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2011-11-15 23:29:55 +08:00
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/* do not use LLTX in new drivers */
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2011-11-15 23:29:55 +08:00
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NETIF_F_NETNS_LOCAL_BIT, /* Does not change network namespaces */
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NETIF_F_GRO_BIT, /* Generic receive offload */
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NETIF_F_LRO_BIT, /* large receive offload */
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/**/NETIF_F_GSO_SHIFT, /* keep the order of SKB_GSO_* bits */
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NETIF_F_TSO_BIT /* ... TCPv4 segmentation */
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= NETIF_F_GSO_SHIFT,
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NETIF_F_UFO_BIT, /* ... UDPv4 fragmentation */
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NETIF_F_GSO_ROBUST_BIT, /* ... ->SKB_GSO_DODGY */
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NETIF_F_TSO_ECN_BIT, /* ... TCP ECN support */
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NETIF_F_TSO6_BIT, /* ... TCPv6 segmentation */
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NETIF_F_FSO_BIT, /* ... FCoE segmentation */
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2013-02-14 22:02:41 +08:00
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NETIF_F_GSO_GRE_BIT, /* ... GRE with TSO */
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2014-06-05 08:20:23 +08:00
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NETIF_F_GSO_GRE_CSUM_BIT, /* ... GRE with csum with TSO */
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2013-10-20 02:42:57 +08:00
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NETIF_F_GSO_IPIP_BIT, /* ... IPIP tunnel with TSO */
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2013-10-21 11:47:30 +08:00
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NETIF_F_GSO_SIT_BIT, /* ... SIT tunnel with TSO */
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2013-03-07 21:21:51 +08:00
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NETIF_F_GSO_UDP_TUNNEL_BIT, /* ... UDP TUNNEL with TSO */
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2014-06-05 08:20:16 +08:00
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NETIF_F_GSO_UDP_TUNNEL_CSUM_BIT,/* ... UDP TUNNEL with TSO & CSUM */
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2014-11-05 01:06:54 +08:00
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NETIF_F_GSO_TUNNEL_REMCSUM_BIT, /* ... TUNNEL with TSO & REMCSUM */
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2013-03-07 21:21:51 +08:00
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/**/NETIF_F_GSO_LAST = /* last bit, see GSO_MASK */
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2014-11-05 01:06:54 +08:00
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NETIF_F_GSO_TUNNEL_REMCSUM_BIT,
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2011-11-15 23:29:55 +08:00
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NETIF_F_FCOE_CRC_BIT, /* FCoE CRC32 */
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NETIF_F_SCTP_CSUM_BIT, /* SCTP checksum offload */
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NETIF_F_FCOE_MTU_BIT, /* Supports max FCoE MTU, 2158 bytes*/
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NETIF_F_NTUPLE_BIT, /* N-tuple filters supported */
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NETIF_F_RXHASH_BIT, /* Receive hashing offload */
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NETIF_F_RXCSUM_BIT, /* Receive checksumming offload */
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NETIF_F_NOCACHE_COPY_BIT, /* Use no-cache copyfromuser */
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NETIF_F_LOOPBACK_BIT, /* Enable loopback */
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2012-02-11 23:39:14 +08:00
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NETIF_F_RXFCS_BIT, /* Append FCS to skb pkt data */
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2012-02-11 23:39:45 +08:00
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NETIF_F_RXALL_BIT, /* Receive errored frames too */
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2013-05-02 16:31:32 +08:00
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NETIF_F_HW_VLAN_STAG_TX_BIT, /* Transmit VLAN STAG HW acceleration */
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NETIF_F_HW_VLAN_STAG_RX_BIT, /* Receive VLAN STAG HW acceleration */
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NETIF_F_HW_VLAN_STAG_FILTER_BIT,/* Receive filtering on VLAN STAGs */
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2013-11-07 01:54:46 +08:00
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NETIF_F_HW_L2FW_DOFFLOAD_BIT, /* Allow L2 Forwarding in Hardware */
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2014-04-03 05:09:31 +08:00
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NETIF_F_BUSY_POLL_BIT, /* Busy poll */
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2011-11-15 23:29:55 +08:00
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/*
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* Add your fresh new feature above and remember to update
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* netdev_features_strings[] in net/core/ethtool.c and maybe
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* some feature mask #defines below. Please also describe it
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* in Documentation/networking/netdev-features.txt.
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*/
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2011-11-15 23:29:55 +08:00
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2011-11-15 23:29:55 +08:00
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/**/NETDEV_FEATURE_COUNT
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};
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2011-11-15 23:29:55 +08:00
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2011-11-15 23:29:55 +08:00
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/* copy'n'paste compression ;) */
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#define __NETIF_F_BIT(bit) ((netdev_features_t)1 << (bit))
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#define __NETIF_F(name) __NETIF_F_BIT(NETIF_F_##name##_BIT)
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#define NETIF_F_FCOE_CRC __NETIF_F(FCOE_CRC)
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#define NETIF_F_FCOE_MTU __NETIF_F(FCOE_MTU)
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#define NETIF_F_FRAGLIST __NETIF_F(FRAGLIST)
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#define NETIF_F_FSO __NETIF_F(FSO)
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#define NETIF_F_GRO __NETIF_F(GRO)
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#define NETIF_F_GSO __NETIF_F(GSO)
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#define NETIF_F_GSO_ROBUST __NETIF_F(GSO_ROBUST)
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#define NETIF_F_HIGHDMA __NETIF_F(HIGHDMA)
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#define NETIF_F_HW_CSUM __NETIF_F(HW_CSUM)
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2013-04-19 10:04:27 +08:00
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#define NETIF_F_HW_VLAN_CTAG_FILTER __NETIF_F(HW_VLAN_CTAG_FILTER)
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#define NETIF_F_HW_VLAN_CTAG_RX __NETIF_F(HW_VLAN_CTAG_RX)
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#define NETIF_F_HW_VLAN_CTAG_TX __NETIF_F(HW_VLAN_CTAG_TX)
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2011-11-15 23:29:55 +08:00
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#define NETIF_F_IP_CSUM __NETIF_F(IP_CSUM)
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#define NETIF_F_IPV6_CSUM __NETIF_F(IPV6_CSUM)
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#define NETIF_F_LLTX __NETIF_F(LLTX)
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#define NETIF_F_LOOPBACK __NETIF_F(LOOPBACK)
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#define NETIF_F_LRO __NETIF_F(LRO)
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#define NETIF_F_NETNS_LOCAL __NETIF_F(NETNS_LOCAL)
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#define NETIF_F_NOCACHE_COPY __NETIF_F(NOCACHE_COPY)
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#define NETIF_F_NTUPLE __NETIF_F(NTUPLE)
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#define NETIF_F_RXCSUM __NETIF_F(RXCSUM)
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#define NETIF_F_RXHASH __NETIF_F(RXHASH)
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#define NETIF_F_SCTP_CSUM __NETIF_F(SCTP_CSUM)
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#define NETIF_F_SG __NETIF_F(SG)
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#define NETIF_F_TSO6 __NETIF_F(TSO6)
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#define NETIF_F_TSO_ECN __NETIF_F(TSO_ECN)
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#define NETIF_F_TSO __NETIF_F(TSO)
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#define NETIF_F_UFO __NETIF_F(UFO)
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#define NETIF_F_VLAN_CHALLENGED __NETIF_F(VLAN_CHALLENGED)
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2012-02-11 23:39:14 +08:00
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#define NETIF_F_RXFCS __NETIF_F(RXFCS)
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2012-02-11 23:39:45 +08:00
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#define NETIF_F_RXALL __NETIF_F(RXALL)
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2013-03-16 12:47:55 +08:00
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#define NETIF_F_GSO_GRE __NETIF_F(GSO_GRE)
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2014-06-05 08:20:23 +08:00
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#define NETIF_F_GSO_GRE_CSUM __NETIF_F(GSO_GRE_CSUM)
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2013-10-20 02:42:57 +08:00
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#define NETIF_F_GSO_IPIP __NETIF_F(GSO_IPIP)
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2013-10-21 11:47:30 +08:00
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#define NETIF_F_GSO_SIT __NETIF_F(GSO_SIT)
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2013-03-16 12:47:55 +08:00
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#define NETIF_F_GSO_UDP_TUNNEL __NETIF_F(GSO_UDP_TUNNEL)
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2014-06-15 14:23:52 +08:00
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#define NETIF_F_GSO_UDP_TUNNEL_CSUM __NETIF_F(GSO_UDP_TUNNEL_CSUM)
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2014-11-05 01:06:54 +08:00
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#define NETIF_F_GSO_TUNNEL_REMCSUM __NETIF_F(GSO_TUNNEL_REMCSUM)
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2013-05-02 16:31:32 +08:00
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#define NETIF_F_HW_VLAN_STAG_FILTER __NETIF_F(HW_VLAN_STAG_FILTER)
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#define NETIF_F_HW_VLAN_STAG_RX __NETIF_F(HW_VLAN_STAG_RX)
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#define NETIF_F_HW_VLAN_STAG_TX __NETIF_F(HW_VLAN_STAG_TX)
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2013-11-07 01:54:46 +08:00
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#define NETIF_F_HW_L2FW_DOFFLOAD __NETIF_F(HW_L2FW_DOFFLOAD)
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2014-04-03 05:09:31 +08:00
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#define NETIF_F_BUSY_POLL __NETIF_F(BUSY_POLL)
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2011-11-15 23:29:55 +08:00
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2015-11-03 23:15:59 +08:00
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#define for_each_netdev_feature(mask_addr, bit) \
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for_each_set_bit(bit, (unsigned long *)mask_addr, NETDEV_FEATURE_COUNT)
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net/core: generic support for disabling netdev features down stack
There are some netdev features, which when disabled on an upper device,
such as a bonding master or a bridge, must be disabled and cannot be
re-enabled on underlying devices.
This is a rework of an earlier more heavy-handed appraoch, which simply
disables and prevents re-enabling of netdev features listed in a new
define in include/net/netdev_features.h, NETIF_F_UPPER_DISABLES. Any upper
device that disables a flag in that feature mask, the disabling will
propagate down the stack, and any lower device that has any upper device
with one of those flags disabled should not be able to enable said flag.
Initially, only LRO is included for proof of concept, and because this
code effectively does the same thing as dev_disable_lro(), though it will
also activate from the ethtool path, which was one of the goals here.
[root@dell-per730-01 ~]# ethtool -k bond0 |grep large
large-receive-offload: on
[root@dell-per730-01 ~]# ethtool -k p5p1 |grep large
large-receive-offload: on
[root@dell-per730-01 ~]# ethtool -K bond0 lro off
[root@dell-per730-01 ~]# ethtool -k bond0 |grep large
large-receive-offload: off
[root@dell-per730-01 ~]# ethtool -k p5p1 |grep large
large-receive-offload: off
dmesg dump:
[ 1033.277986] bond0: Disabling feature 0x0000000000008000 on lower dev p5p2.
[ 1034.067949] bnx2x 0000:06:00.1 p5p2: using MSI-X IRQs: sp 74 fp[0] 76 ... fp[7] 83
[ 1034.753612] bond0: Disabling feature 0x0000000000008000 on lower dev p5p1.
[ 1035.591019] bnx2x 0000:06:00.0 p5p1: using MSI-X IRQs: sp 62 fp[0] 64 ... fp[7] 71
This has been successfully tested with bnx2x, qlcnic and netxen network
cards as slaves in a bond interface. Turning LRO on or off on the master
also turns it on or off on each of the slaves, new slaves are added with
LRO in the same state as the master, and LRO can't be toggled on the
slaves.
Also, this should largely remove the need for dev_disable_lro(), and most,
if not all, of its call sites can be replaced by simply making sure
NETIF_F_LRO isn't included in the relevant device's feature flags.
Note that this patch is driven by bug reports from users saying it was
confusing that bonds and slaves had different settings for the same
features, and while it won't be 100% in sync if a lower device doesn't
support a feature like LRO, I think this is a good step in the right
direction.
CC: "David S. Miller" <davem@davemloft.net>
CC: Eric Dumazet <edumazet@google.com>
CC: Jay Vosburgh <j.vosburgh@gmail.com>
CC: Veaceslav Falico <vfalico@gmail.com>
CC: Andy Gospodarek <gospo@cumulusnetworks.com>
CC: Jiri Pirko <jiri@resnulli.us>
CC: Nikolay Aleksandrov <razor@blackwall.org>
CC: Michal Kubecek <mkubecek@suse.cz>
CC: Alexander Duyck <alexander.duyck@gmail.com>
CC: netdev@vger.kernel.org
Signed-off-by: Jarod Wilson <jarod@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-11-03 10:55:59 +08:00
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2011-11-15 23:29:55 +08:00
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/* Features valid for ethtool to change */
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/* = all defined minus driver/device-class-related */
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#define NETIF_F_NEVER_CHANGE (NETIF_F_VLAN_CHALLENGED | \
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NETIF_F_LLTX | NETIF_F_NETNS_LOCAL)
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2011-11-15 23:29:55 +08:00
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/* remember that ((t)1 << t_BITS) is undefined in C99 */
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#define NETIF_F_ETHTOOL_BITS ((__NETIF_F_BIT(NETDEV_FEATURE_COUNT - 1) | \
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(__NETIF_F_BIT(NETDEV_FEATURE_COUNT - 1) - 1)) & \
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~NETIF_F_NEVER_CHANGE)
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/* Segmentation offload feature mask */
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#define NETIF_F_GSO_MASK (__NETIF_F_BIT(NETIF_F_GSO_LAST + 1) - \
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__NETIF_F_BIT(NETIF_F_GSO_SHIFT))
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2011-11-15 23:29:55 +08:00
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/* List of features with software fallbacks. */
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#define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | \
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NETIF_F_TSO6 | NETIF_F_UFO)
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2011-11-15 23:29:55 +08:00
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#define NETIF_F_GEN_CSUM NETIF_F_HW_CSUM
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2011-11-15 23:29:55 +08:00
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#define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM)
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#define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM)
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#define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM)
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#define NETIF_F_ALL_TSO (NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_TSO_ECN)
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#define NETIF_F_ALL_FCOE (NETIF_F_FCOE_CRC | NETIF_F_FCOE_MTU | \
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NETIF_F_FSO)
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/*
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* If one device supports one of these features, then enable them
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* for all in netdev_increment_features.
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*/
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#define NETIF_F_ONE_FOR_ALL (NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ROBUST | \
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NETIF_F_SG | NETIF_F_HIGHDMA | \
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2015-05-11 00:48:07 +08:00
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NETIF_F_FRAGLIST | NETIF_F_VLAN_CHALLENGED)
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2015-01-30 14:40:11 +08:00
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2011-11-15 23:29:55 +08:00
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/*
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* If one device doesn't support one of these features, then disable it
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* for all in netdev_increment_features.
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*/
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#define NETIF_F_ALL_FOR_ALL (NETIF_F_NOCACHE_COPY | NETIF_F_FSO)
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net/core: generic support for disabling netdev features down stack
There are some netdev features, which when disabled on an upper device,
such as a bonding master or a bridge, must be disabled and cannot be
re-enabled on underlying devices.
This is a rework of an earlier more heavy-handed appraoch, which simply
disables and prevents re-enabling of netdev features listed in a new
define in include/net/netdev_features.h, NETIF_F_UPPER_DISABLES. Any upper
device that disables a flag in that feature mask, the disabling will
propagate down the stack, and any lower device that has any upper device
with one of those flags disabled should not be able to enable said flag.
Initially, only LRO is included for proof of concept, and because this
code effectively does the same thing as dev_disable_lro(), though it will
also activate from the ethtool path, which was one of the goals here.
[root@dell-per730-01 ~]# ethtool -k bond0 |grep large
large-receive-offload: on
[root@dell-per730-01 ~]# ethtool -k p5p1 |grep large
large-receive-offload: on
[root@dell-per730-01 ~]# ethtool -K bond0 lro off
[root@dell-per730-01 ~]# ethtool -k bond0 |grep large
large-receive-offload: off
[root@dell-per730-01 ~]# ethtool -k p5p1 |grep large
large-receive-offload: off
dmesg dump:
[ 1033.277986] bond0: Disabling feature 0x0000000000008000 on lower dev p5p2.
[ 1034.067949] bnx2x 0000:06:00.1 p5p2: using MSI-X IRQs: sp 74 fp[0] 76 ... fp[7] 83
[ 1034.753612] bond0: Disabling feature 0x0000000000008000 on lower dev p5p1.
[ 1035.591019] bnx2x 0000:06:00.0 p5p1: using MSI-X IRQs: sp 62 fp[0] 64 ... fp[7] 71
This has been successfully tested with bnx2x, qlcnic and netxen network
cards as slaves in a bond interface. Turning LRO on or off on the master
also turns it on or off on each of the slaves, new slaves are added with
LRO in the same state as the master, and LRO can't be toggled on the
slaves.
Also, this should largely remove the need for dev_disable_lro(), and most,
if not all, of its call sites can be replaced by simply making sure
NETIF_F_LRO isn't included in the relevant device's feature flags.
Note that this patch is driven by bug reports from users saying it was
confusing that bonds and slaves had different settings for the same
features, and while it won't be 100% in sync if a lower device doesn't
support a feature like LRO, I think this is a good step in the right
direction.
CC: "David S. Miller" <davem@davemloft.net>
CC: Eric Dumazet <edumazet@google.com>
CC: Jay Vosburgh <j.vosburgh@gmail.com>
CC: Veaceslav Falico <vfalico@gmail.com>
CC: Andy Gospodarek <gospo@cumulusnetworks.com>
CC: Jiri Pirko <jiri@resnulli.us>
CC: Nikolay Aleksandrov <razor@blackwall.org>
CC: Michal Kubecek <mkubecek@suse.cz>
CC: Alexander Duyck <alexander.duyck@gmail.com>
CC: netdev@vger.kernel.org
Signed-off-by: Jarod Wilson <jarod@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-11-03 10:55:59 +08:00
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/*
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* If upper/master device has these features disabled, they must be disabled
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* on all lower/slave devices as well.
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*/
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#define NETIF_F_UPPER_DISABLES NETIF_F_LRO
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2011-11-15 23:29:55 +08:00
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/* changeable features with no special hardware requirements */
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#define NETIF_F_SOFT_FEATURES (NETIF_F_GSO | NETIF_F_GRO)
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2014-03-28 10:14:49 +08:00
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#define NETIF_F_VLAN_FEATURES (NETIF_F_HW_VLAN_CTAG_FILTER | \
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NETIF_F_HW_VLAN_CTAG_RX | \
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NETIF_F_HW_VLAN_CTAG_TX | \
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NETIF_F_HW_VLAN_STAG_FILTER | \
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NETIF_F_HW_VLAN_STAG_RX | \
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NETIF_F_HW_VLAN_STAG_TX)
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2014-07-18 06:14:15 +08:00
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#define NETIF_F_GSO_ENCAP_ALL (NETIF_F_GSO_GRE | \
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NETIF_F_GSO_GRE_CSUM | \
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NETIF_F_GSO_IPIP | \
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NETIF_F_GSO_SIT | \
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NETIF_F_GSO_UDP_TUNNEL | \
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2014-11-06 07:27:48 +08:00
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NETIF_F_GSO_UDP_TUNNEL_CSUM)
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2014-07-18 06:14:15 +08:00
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2011-11-15 23:29:55 +08:00
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#endif /* _LINUX_NETDEV_FEATURES_H */
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