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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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90017accff
SCTP has this pecualiarity that its packets cannot be just segmented to
(P)MTU. Its chunks must be contained in IP segments, padding respected.
So we can't just generate a big skb, set gso_size to the fragmentation
point and deliver it to IP layer.
This patch takes a different approach. SCTP will now build a skb as it
would be if it was received using GRO. That is, there will be a cover
skb with protocol headers and children ones containing the actual
segments, already segmented to a way that respects SCTP RFCs.
With that, we can tell skb_segment() to just split based on frag_list,
trusting its sizes are already in accordance.
This way SCTP can benefit from GSO and instead of passing several
packets through the stack, it can pass a single large packet.
v2:
- Added support for receiving GSO frames, as requested by Dave Miller.
- Clear skb->cb if packet is GSO (otherwise it's not used by SCTP)
- Added heuristics similar to what we have in TCP for not generating
single GSO packets that fills cwnd.
v3:
- consider sctphdr size in skb_gso_transport_seglen()
- rebased due to 5c7cdf339a ("gso: Remove arbitrary checks for
unsupported GSO")
Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Tested-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
212 lines
8.4 KiB
C
212 lines
8.4 KiB
C
/*
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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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#include <linux/types.h>
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typedef u64 netdev_features_t;
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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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__UNUSED_NETIF_F_1,
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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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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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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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/* do not use LLTX in new drivers */
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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_TSO_MANGLEID_BIT, /* ... IPV4 ID mangling allowed */
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NETIF_F_TSO6_BIT, /* ... TCPv6 segmentation */
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NETIF_F_FSO_BIT, /* ... FCoE segmentation */
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NETIF_F_GSO_GRE_BIT, /* ... GRE with TSO */
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NETIF_F_GSO_GRE_CSUM_BIT, /* ... GRE with csum with TSO */
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NETIF_F_GSO_IPXIP4_BIT, /* ... IP4 or IP6 over IP4 with TSO */
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NETIF_F_GSO_IPXIP6_BIT, /* ... IP4 or IP6 over IP6 with TSO */
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NETIF_F_GSO_UDP_TUNNEL_BIT, /* ... UDP TUNNEL with TSO */
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NETIF_F_GSO_UDP_TUNNEL_CSUM_BIT,/* ... UDP TUNNEL with TSO & CSUM */
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NETIF_F_GSO_PARTIAL_BIT, /* ... Only segment inner-most L4
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* in hardware and all other
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* headers in software.
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*/
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NETIF_F_GSO_TUNNEL_REMCSUM_BIT, /* ... TUNNEL with TSO & REMCSUM */
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NETIF_F_GSO_SCTP_BIT, /* ... SCTP fragmentation */
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/**/NETIF_F_GSO_LAST = /* last bit, see GSO_MASK */
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NETIF_F_GSO_SCTP_BIT,
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NETIF_F_FCOE_CRC_BIT, /* FCoE CRC32 */
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NETIF_F_SCTP_CRC_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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NETIF_F_RXFCS_BIT, /* Append FCS to skb pkt data */
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NETIF_F_RXALL_BIT, /* Receive errored frames too */
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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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NETIF_F_HW_L2FW_DOFFLOAD_BIT, /* Allow L2 Forwarding in Hardware */
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NETIF_F_BUSY_POLL_BIT, /* Busy poll */
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NETIF_F_HW_TC_BIT, /* Offload TC infrastructure */
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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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/**/NETDEV_FEATURE_COUNT
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};
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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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#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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#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_CRC __NETIF_F(SCTP_CRC)
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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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#define NETIF_F_RXFCS __NETIF_F(RXFCS)
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#define NETIF_F_RXALL __NETIF_F(RXALL)
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#define NETIF_F_GSO_GRE __NETIF_F(GSO_GRE)
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#define NETIF_F_GSO_GRE_CSUM __NETIF_F(GSO_GRE_CSUM)
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#define NETIF_F_GSO_IPXIP4 __NETIF_F(GSO_IPXIP4)
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#define NETIF_F_GSO_IPXIP6 __NETIF_F(GSO_IPXIP6)
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#define NETIF_F_GSO_UDP_TUNNEL __NETIF_F(GSO_UDP_TUNNEL)
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#define NETIF_F_GSO_UDP_TUNNEL_CSUM __NETIF_F(GSO_UDP_TUNNEL_CSUM)
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#define NETIF_F_TSO_MANGLEID __NETIF_F(TSO_MANGLEID)
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#define NETIF_F_GSO_PARTIAL __NETIF_F(GSO_PARTIAL)
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#define NETIF_F_GSO_TUNNEL_REMCSUM __NETIF_F(GSO_TUNNEL_REMCSUM)
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#define NETIF_F_GSO_SCTP __NETIF_F(GSO_SCTP)
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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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#define NETIF_F_HW_L2FW_DOFFLOAD __NETIF_F(HW_L2FW_DOFFLOAD)
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#define NETIF_F_BUSY_POLL __NETIF_F(BUSY_POLL)
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#define NETIF_F_HW_TC __NETIF_F(HW_TC)
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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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/* 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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/* 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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/* List of IP checksum features. Note that NETIF_F_ HW_CSUM should not be
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* set in features when NETIF_F_IP_CSUM or NETIF_F_IPV6_CSUM are set--
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* this would be contradictory
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*/
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#define NETIF_F_CSUM_MASK (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | \
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NETIF_F_HW_CSUM)
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#define NETIF_F_ALL_TSO (NETIF_F_TSO | NETIF_F_TSO6 | \
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NETIF_F_TSO_ECN | NETIF_F_TSO_MANGLEID)
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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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/* List of features with software fallbacks. */
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#define NETIF_F_GSO_SOFTWARE (NETIF_F_ALL_TSO | NETIF_F_UFO | \
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NETIF_F_GSO_SCTP)
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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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NETIF_F_FRAGLIST | NETIF_F_VLAN_CHALLENGED)
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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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/*
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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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/* 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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#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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#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_IPXIP4 | \
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NETIF_F_GSO_IPXIP6 | \
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NETIF_F_GSO_UDP_TUNNEL | \
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NETIF_F_GSO_UDP_TUNNEL_CSUM)
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#endif /* _LINUX_NETDEV_FEATURES_H */
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