Public bug reported:
SRU Justification:
[Impact]
This change is needed to avoid potential tmfifo console stuck when network
interface is down or receiving oversized packets.
[Fix]
Drop the Rx packets in the above cases. Since tmfifo is shared resource for
both console and networking. Dropping such network packets can continue to
process the fifo and avoid console stuck.
[Test Case]
Same functionality and testing as on BlueField-1/2/2. No functionality change.
Add negative tests:
1. 'ifconfig tmfifo_net0 down' on ARM side during traffic, then verify rshim
console doesn't stuck.
2. Config MTU to 4000 on rshim host and send oversized packet with command
'ping 192.168.100.2 -s 2000". It shouldn't cause any stuck.
[Regression Potential]
Same behavior from user perspective.
** Affects: linux-bluefield (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/2021749
Title:
mlxbf-tmfifo: robust fix to drop over-sized packet or no Rx
descriptors
Status in linux-bluefield package in Ubuntu:
New
Bug description:
SRU Justification:
[Impact]
This change is needed to avoid potential tmfifo console stuck when network
interface is down or receiving oversized packets.
[Fix]
Drop the Rx packets in the above cases. Since tmfifo is shared resource for
both console and networking. Dropping such network packets can continue to
process the fifo and avoid console stuck.
[Test Case]
Same functionality and testing as on BlueField-1/2/2. No functionality change.
Add negative tests:
1. 'ifconfig tmfifo_net0 down' on ARM side during traffic, then verify rshim
console doesn't stuck.
2. Config MTU to 4000 on rshim host and send oversized packet with command
'ping 192.168.100.2 -s 2000". It shouldn't cause any stuck.
[Regression Potential]
Same behavior from user perspective.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux-bluefield/+bug/2021749/+subscriptions
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