[dpdk-dev] [Bug 549] With offloads, bond device initialization fails with command-line bond arguments

[bugzilla at dpdk.org]

https://bugs.dpdk.org/show_bug.cgi?id=549

            Bug ID: 549
           Summary: With offloads, bond device initialization fails with
                    command-line bond arguments
           Product: DPDK
           Version: 20.11
          Hardware: All
                OS: All
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: eventdev
          Assignee: dev at dpdk.org
          Reporter: kiran.kn80 at gmail.com
  Target Milestone: ---

In Tungsten fabric, we are trying to initialize bond device using the
command-line vdev argument - 

"--vdev
eth_bond_bond0,mode=4,xmit_policy=l34,socket_id=0,mac=00:1b:21:bb:f9:48,lacp_rate=0,slave=0000:02:00.0,slave=0000:02:00.1"

We have the bond device offloads set - DEV_RX_OFFLOAD_CHECKSUM and
DEV_RX_OFFLOAD_JUMBO_FRAME

It fails here -
https://github.com/DPDK/dpdk/blob/main/lib/librte_ethdev/rte_ethdev.c#L1378

In DPDK 18.05, this "return" was not present, but it's added in DPDK 19.11.

The reason it fails there is because bond inherits offloads from slave. But in
case where command-line arguments are present for the bond, the slave is
initialized from the bond driver later and so it is not initialized. Due to
this, offloads are not inherited to the bond device and the above check fails.

I have discussed this with Doherty, Declan <declan.doherty at intel.com> and he
agrees this needs to be fixed.

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