Marking verification done according to #3.

** Tags removed: verification-needed-focal
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You received this bug notification because you are a member of Kernel
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https://bugs.launchpad.net/bugs/1928788

Title:
  linux-azure: Add Mana network driver

Status in linux package in Ubuntu:
  Fix Released
Status in linux-azure package in Ubuntu:
  Fix Released
Status in linux-azure-5.8 package in Ubuntu:
  Invalid
Status in linux source package in Focal:
  Invalid
Status in linux-azure source package in Focal:
  Fix Committed
Status in linux-azure-5.8 source package in Focal:
  In Progress
Status in linux source package in Groovy:
  Invalid
Status in linux-azure source package in Groovy:
  Fix Committed
Status in linux-azure-5.8 source package in Groovy:
  Invalid

Bug description:
  SRU Justification

  [Impact]

  Microsoft has requested the addition of the "mana" driver from Linux v5.11
  https://canonical.my.salesforce.com/5004K000005pZQCQA2

  [Fix]

  This patch set consists of 5 patches that are now in mainline.

  The patches add the VF driver for Microsoft Azure Network Adapter
  (MANA), and also changes the hv_netvsc driver's netvsc/VF binding
  logic to check both the MAC address and the serial number (this is
  required by the MANA VF driver).

  Microsoft would like to request the following 5 patches in all
  supported releases:

  
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=64ff412ad41fe3a5bf759ff4844dc1382176485c

  https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-
  next.git/commit/?id=ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f

  https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-
  next.git/commit/?id=55cdc26a91ac270887583945aef2bd460a2805f7

  https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-
  next.git/commit/?id=45b102dd81491e30ac7596b5515856141f99319f

  https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-
  next.git/commit/?id=d90a94680bc0a8069d93282bc5f2966d00b9c4a4

  [Test Plan]

  2021-05-17 15:25 UTC-
  -We tested the two versions of mana.ko:

  root@decui-u2004-vf:~# uname -a
  Linux decui-u2004-vf 5.4.0-1048-azure #50~sf00310147.1-Ubuntu SMP Tue May 11 
02:06:24 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux
  root@decui-u2004-vf:~# modinfo mana | grep filename
  filename: 
/lib/modules/5.4.0-1048-azure/kernel/drivers/net/ethernet/microsoft/mana/mana.ko

  root@decui-u2004-vf:~# uname -a
  Linux decui-u2004-vf 5.8.0-1032-azure #34~SF00310147.1-Ubuntu SMP Tue May 11 
02:01:58 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux
  root@decui-u2004-vf:~# modinfo mana | grep filename
  filename: 
/lib/modules/5.8.0-1032-azure/kernel/drivers/net/ethernet/microsoft/mana/mana.ko

  Everything worked as expected in our testing:
  1. The MANA driver loads and unloads multiple times without any issue.
  2. iperf TX/RX tests run without any issue, and the performance numbers are 
on par with what we get with the latest mainline kernel: the TX number is 
pretty good; the RX number is sometimes not great but this is a known issue 
with the latest mainline kernel as well.
  3. "ethtool -S" and "ethtool -L" work as expected.
  4. When iperf TX/RX tests are running, changing the number of the MANA NIC 
TX/RX queues and unloading/reloading the MANA driver work without any issue.

  [Where problems could occur]

  The driver may have bug(s) that cause a kernel crash.

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