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e4ea162509
Add capabilities RXCSUM and RXCSUM6 as well as TXCSUM and TXCSUM6 for for receive and transmit checksum offloading for TCP and UDP to the epair interface and enable them by default. RXCSUM and RXCSUM6 are enabled because an epair interface may receive a packet with the csum_flag CSUM_DATA_VALID set, which is expected only if these capabilities are enabled. Since it seems not helpful to remove this flag, it is not possible to disable these capabilities. TXCSUM and TXCSUM6 are synchronized between the two epair interface ends. If enabled/disabled on one end, it will be enabled/disabled on the other end. If the sending epair interface end has TXCSUM or TXCSUM6 enabled and the receiving end is in a bridge, it is assumed that all interfaces in the bridge have that capability enabled. Otherwise the bridge would have disabled that capability on the receiving epair interface end in the bridge which would have disabled that capability on the sending epair interface end as well due to the synchronization. Reviewed by: bcr, Seyed Pouria Mousavizadeh Tehrani MFC after: 4 weeks Differential Revision: https://reviews.freebsd.org/D51639 |
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