Make disabling TX checksum offload configurable #3832
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## main #3832 +/- ##
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- Coverage 62.18% 46.10% -16.09%
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Lines 40091 35913 -4178
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/test-all |
jianjuns
reviewed
May 26, 2022
| @@ -48,7 +48,7 @@ type ifConfigurator struct { | |||
| epCache *sync.Map | |||
| } | |||
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| func newInterfaceConfigurator(ovsDatapathType ovsconfig.OVSDatapathType, isOvsHardwareOffloadEnabled bool) (*ifConfigurator, error) { | |||
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Add a comment saying disableTXChecksumOffload is ignored on Windows?
| @@ -170,6 +170,10 @@ data: | |||
| # `trafficEncapMode` is `noEncap`, and `noSNAT` is true. | |||
| enableBridgingMode: false | |||
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| # Disable TX checksum offloading for container network interfaces. It's supposed to be set to true when the | |||
| # datapath doesn't support TX checksum offloading, which causes packets to be dropped due to bad checksum. | |||
| disableTXChecksumOffload: false | |||
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We should say it is on Linux only?
Yes. I remember it's also the case of Snort. I saw this issue in several places where packets are passed to userspace and sent back to kernel for transmission. Not sure if it's specific to AF_PACKET, I will try other capture methods. |
Add a configuration parameter `disableTXChecksumOffload` for Antrea Agent to support cases in which the datapath doesn't support TX checksum offloading, which causes packets to be dropped due to bad checksum. Signed-off-by: Quan Tian <[email protected]>
jianjuns
approved these changes
May 26, 2022
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/test-all |
antoninbas
approved these changes
May 26, 2022
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Sure @jianjuns @antoninbas, I will explore better solutions. |
hongliangl
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Jun 30, 2022
This is a supplement to PR antrea-io#3832. When `disableTXChecksumOffload` is true, TX checksum offload should be also disabled, otherwise for the cases in which the datapath doesn't support TX checksum offloading, packets received on Antrea gateway could be dropped due to bad checksum. Signed-off-by: Hongliang Liu <[email protected]>
hongliangl
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Jul 1, 2022
This is a supplement to PR antrea-io#3832. When `disableTXChecksumOffload` is true, TX checksum offload of Antrea gateway should be also disabled, otherwise for the cases in which the datapath doesn't support TX checksum offloading, packets sent from Antrea gateway could be dropped due to bad checksum. Note that, when changing `disableTXChecksumOffload` from true back to false, TX checksum offload of Antrea gateway will not be enabled automatically, and TX checksum offload can be enabled manually with ethtool. Another way is to remove Antrea gateway interface before updating `disableTXChecksumOffload`. Signed-off-by: Hongliang Liu <[email protected]>
hongliangl
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Sep 27, 2022
This is a supplement to PR antrea-io#3832. When `disableTXChecksumOffload` is true, TX checksum offload of Antrea gateway should be also disabled, otherwise for the cases in which the datapath doesn't support TX checksum offloading, packets sent from Antrea gateway could be dropped due to bad checksum. Note that, when changing `disableTXChecksumOffload` from true back to false, TX checksum offload of Antrea gateway will not be enabled automatically, and TX checksum offload can be enabled manually with ethtool. Another way is to remove Antrea gateway interface before updating `disableTXChecksumOffload`. Signed-off-by: Hongliang Liu <[email protected]>
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Add a configuration parameter
disableTXChecksumOffloadfor Antrea Agent to support cases in which the datapath doesn't support TX checksum offloading, which causes packets to be dropped due to bad checksum.Signed-off-by: Quan Tian [email protected]
This is required when using TrafficControl Redirect action with threat detection engines' certain packet capture methods, e.g. Suricata AF_PACKET, with which skb csum state is messed up after it's processed by engines' userspace, leading to packet drop on destination.