Author: np Date: Fri Sep 18 01:38:47 2020 New Revision: 365867 URL: https://svnweb.freebsd.org/changeset/base/365867
Log: mbuf checksum flags and fields to support tunneling protocols. These are being added to support VXLAN but will work for GENEVE as well. ENCAP_RSVD1 will likely become ENCAP_GENEVE in the future. The size of struct mbuf does not change and that means this change can be MFC'd. If size wasn't a constraint a cleaner way may have been to add inner_csum_flags and inner_csum_data to go with csum_flags and csum_data. Reviewed by: kib@ Sponsored by: Chelsio Communications Differential Revision: https://reviews.freebsd.org/D25873 Modified: head/sys/sys/mbuf.h Modified: head/sys/sys/mbuf.h ============================================================================== --- head/sys/sys/mbuf.h Fri Sep 18 01:11:11 2020 (r365866) +++ head/sys/sys/mbuf.h Fri Sep 18 01:38:47 2020 (r365867) @@ -171,7 +171,10 @@ struct pkthdr { uint8_t l3hlen; /* layer 3 hdr len */ uint8_t l4hlen; /* layer 4 hdr len */ uint8_t l5hlen; /* layer 5 hdr len */ - uint32_t spare; + uint8_t inner_l2hlen; + uint8_t inner_l3hlen; + uint8_t inner_l4hlen; + uint8_t inner_l5hlen; }; }; union { @@ -616,7 +619,13 @@ m_epg_pagelen(const struct mbuf *m, int pidx, int pgof * Outbound flags that are set by upper protocol layers requesting lower * layers, or ideally the hardware, to perform these offloading tasks. * For outbound packets this field and its flags can be directly tested - * against ifnet if_hwassist. + * against ifnet if_hwassist. Note that the outbound and the inbound flags do + * not collide right now but they could be allowed to (as long as the flags are + * scrubbed appropriately when the direction of an mbuf changes). CSUM_BITS + * would also have to split into CSUM_BITS_TX and CSUM_BITS_RX. + * + * CSUM_INNER_<x> is the same as CSUM_<x> but it applies to the inner frame. + * The CSUM_ENCAP_<x> bits identify the outer encapsulation. */ #define CSUM_IP 0x00000001 /* IP header checksum offload */ #define CSUM_IP_UDP 0x00000002 /* UDP checksum offload */ @@ -625,13 +634,28 @@ m_epg_pagelen(const struct mbuf *m, int pidx, int pgof #define CSUM_IP_TSO 0x00000010 /* TCP segmentation offload */ #define CSUM_IP_ISCSI 0x00000020 /* iSCSI checksum offload */ +#define CSUM_INNER_IP6_UDP 0x00000040 +#define CSUM_INNER_IP6_TCP 0x00000080 +#define CSUM_INNER_IP6_TSO 0x00000100 #define CSUM_IP6_UDP 0x00000200 /* UDP checksum offload */ #define CSUM_IP6_TCP 0x00000400 /* TCP checksum offload */ #define CSUM_IP6_SCTP 0x00000800 /* SCTP checksum offload */ #define CSUM_IP6_TSO 0x00001000 /* TCP segmentation offload */ #define CSUM_IP6_ISCSI 0x00002000 /* iSCSI checksum offload */ +#define CSUM_INNER_IP 0x00004000 +#define CSUM_INNER_IP_UDP 0x00008000 +#define CSUM_INNER_IP_TCP 0x00010000 +#define CSUM_INNER_IP_TSO 0x00020000 + +#define CSUM_ENCAP_VXLAN 0x00040000 /* VXLAN outer encapsulation */ +#define CSUM_ENCAP_RSVD1 0x00080000 + /* Inbound checksum support where the checksum was verified by hardware. */ +#define CSUM_INNER_L3_CALC 0x00100000 +#define CSUM_INNER_L3_VALID 0x00200000 +#define CSUM_INNER_L4_CALC 0x00400000 +#define CSUM_INNER_L4_VALID 0x00800000 #define CSUM_L3_CALC 0x01000000 /* calculated layer 3 csum */ #define CSUM_L3_VALID 0x02000000 /* checksum is correct */ #define CSUM_L4_CALC 0x04000000 /* calculated layer 4 csum */ @@ -642,16 +666,31 @@ m_epg_pagelen(const struct mbuf *m, int pidx, int pgof #define CSUM_SND_TAG 0x80000000 /* Packet header has send tag */ +#define CSUM_FLAGS_TX (CSUM_IP | CSUM_IP_UDP | CSUM_IP_TCP | CSUM_IP_SCTP | \ + CSUM_IP_TSO | CSUM_IP_ISCSI | CSUM_INNER_IP6_UDP | CSUM_INNER_IP6_TCP | \ + CSUM_INNER_IP6_TSO | CSUM_IP6_UDP | CSUM_IP6_TCP | CSUM_IP6_SCTP | \ + CSUM_IP6_TSO | CSUM_IP6_ISCSI | CSUM_INNER_IP | CSUM_INNER_IP_UDP | \ + CSUM_INNER_IP_TCP | CSUM_INNER_IP_TSO | CSUM_ENCAP_VXLAN | \ + CSUM_ENCAP_RSVD1 | CSUM_SND_TAG) + +#define CSUM_FLAGS_RX (CSUM_INNER_L3_CALC | CSUM_INNER_L3_VALID | \ + CSUM_INNER_L4_CALC | CSUM_INNER_L4_VALID | CSUM_L3_CALC | CSUM_L3_VALID | \ + CSUM_L4_CALC | CSUM_L4_VALID | CSUM_L5_CALC | CSUM_L5_VALID | \ + CSUM_COALESCED) + /* * CSUM flag description for use with printf(9) %b identifier. */ #define CSUM_BITS \ "\20\1CSUM_IP\2CSUM_IP_UDP\3CSUM_IP_TCP\4CSUM_IP_SCTP\5CSUM_IP_TSO" \ - "\6CSUM_IP_ISCSI" \ - "\12CSUM_IP6_UDP\13CSUM_IP6_TCP\14CSUM_IP6_SCTP\15CSUM_IP6_TSO" \ - "\16CSUM_IP6_ISCSI" \ - "\31CSUM_L3_CALC\32CSUM_L3_VALID\33CSUM_L4_CALC\34CSUM_L4_VALID" \ - "\35CSUM_L5_CALC\36CSUM_L5_VALID\37CSUM_COALESCED\40CSUM_SND_TAG" + "\6CSUM_IP_ISCSI\7CSUM_INNER_IP6_UDP\10CSUM_INNER_IP6_TCP" \ + "\11CSUM_INNER_IP6_TSO\12CSUM_IP6_UDP\13CSUM_IP6_TCP\14CSUM_IP6_SCTP" \ + "\15CSUM_IP6_TSO\16CSUM_IP6_ISCSI\17CSUM_INNER_IP\20CSUM_INNER_IP_UDP" \ + "\21CSUM_INNER_IP_TCP\22CSUM_INNER_IP_TSO\23CSUM_ENCAP_VXLAN" \ + "\24CSUM_ENCAP_RSVD1\25CSUM_INNER_L3_CALC\26CSUM_INNER_L3_VALID" \ + "\27CSUM_INNER_L4_CALC\30CSUM_INNER_L4_VALID\31CSUM_L3_CALC" \ + "\32CSUM_L3_VALID\33CSUM_L4_CALC\34CSUM_L4_VALID\35CSUM_L5_CALC" \ + "\36CSUM_L5_VALID\37CSUM_COALESCED\40CSUM_SND_TAG" /* CSUM flags compatibility mappings. */ #define CSUM_IP_CHECKED CSUM_L3_CALC @@ -667,6 +706,7 @@ m_epg_pagelen(const struct mbuf *m, int pidx, int pgof #define CSUM_UDP CSUM_IP_UDP #define CSUM_SCTP CSUM_IP_SCTP #define CSUM_TSO (CSUM_IP_TSO|CSUM_IP6_TSO) +#define CSUM_INNER_TSO (CSUM_INNER_IP_TSO|CSUM_INNER_IP6_TSO) #define CSUM_UDP_IPV6 CSUM_IP6_UDP #define CSUM_TCP_IPV6 CSUM_IP6_TCP #define CSUM_SCTP_IPV6 CSUM_IP6_SCTP _______________________________________________ svn-src-head@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
