Added packet metadata for ones complement sum over IP payload in a packet. Some NICs calculate the sum during packet input (at least for IP fragments) and store the value into the packet descriptor. This offloads L4 checksum calculation for IP fragments as SW does not need sum all payload data, but just combine pre-calculated sums from packet descriptors and remove extra header fields from the sum.
----------------github------------------------ /** Email created from pull request 242 (psavol:next-checksum-metadata) ** https://github.com/Linaro/odp/pull/242 ** Patch: https://github.com/Linaro/odp/pull/242.patch ** Base sha: 63d92eb289261d1534b5b9e1e04291faa5e45d30 ** Merge commit sha: 5c16247e4ce2735df80c66f11dd9c9708e8c905f **/ ----------------/github------------------------ ----------------checkpatch.pl------------------------ total: 0 errors, 0 warnings, 0 checks, 26 lines checked to_send-p-000.patch has no obvious style problems and is ready for submission. total: 0 errors, 0 warnings, 0 checks, 14 lines checked to_send-p-001.patch has no obvious style problems and is ready for submission. total: 0 errors, 0 warnings, 0 checks, 55 lines checked to_send-p-002.patch has no obvious style problems and is ready for submission. ----------------/checkpatch.pl------------------------
