[Bug 1772461] Re: chzdev behaviour change in bionic

[Frank Heimes]

** Changed in: ubuntu-z-systems
       Status: New => Confirmed

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Title:
  chzdev behaviour change in bionic

Status in Ubuntu on IBM z Systems:
  Confirmed
Status in s390-tools package in Ubuntu:
  Confirmed

Bug description:
  This may be less of a bug, and more of a change of usage:

  Using preseeds for xenial I was successfully able to configure
  bridge_role=primary on a qeth device, using this command:

  chzdev --no-root-update -pVe ${NIC_ID} layer2=1 bridge_role=primary

  However, this no longer works - upon reboot, bridge_role is set to
  none.

  Running this command manually, on the built lpar, without --no-root-
  update, returns:

  QETH device 0.0.c003:0.0.c004:0.0.c005 already configured

  Running sudo chzdev -Ve 0.0.c003 layer2=1 bridge_role=primary

  returns

  Error: Cannot set layer2='1' while online='1' (*)

  Running with --force still complains about being online, so first i
  take the dev offline, and rerun the command, but get this:

  Error: Settings bridge_role and vnicc/rx_bcast are in conflict (*)

  ubuntu at s4lp5:/sys/devices/qeth/0.0.c003$ cat vnicc/rx_bcast 
  n/a
  ubuntu at s4lp5:/sys/devices/qeth/0.0.c003$

  The only combination that seems to work is:

  ubuntu at s4lp5:/sys/devices/qeth/0.0.c003$ sudo chzdev -Ve 0.0.c003 layer2=1 bridge_role=primary online=0 --force
  Scanning for devices in all configurations:
    ECKD DASD          : 268
  Loading required kernel module: dasd_fba_mod
  Failed to load kernel module: dasd_fba_mod
    FBA DASD           : 0
    FCP device         : 20
    zFCP LUN           : 0
    QETH device        : 42
  Loading required kernel module: ctcm
  Failed to load kernel module: ctcm
    CTC device         : 0
  Loading required kernel module: lcs
  Failed to load kernel module: lcs
    LCS device         : 0
    Generic CCW device : 1
    Total              : 331
  QETH device 0.0.c003:0.0.c004:0.0.c005 configured
      Changes: online=0 bridge_role=primary
      Network interface: encc003
      Warning: Settings bridge_role and vnicc/rx_bcast are in conflict

  ubuntu at s4lp5:/sys/devices/qeth/0.0.c003$ cat bridge_role
  primary
  ubuntu at s4lp5:/sys/devices/qeth/0.0.c003$ sudo chzdev -Ve 0.0.c003 online=1
  Scanning for devices in all configurations:
    ECKD DASD          : 268
  Loading required kernel module: dasd_fba_mod
  Failed to load kernel module: dasd_fba_mod
    FBA DASD           : 0
    FCP device         : 20
    zFCP LUN           : 0
    QETH device        : 42
  Loading required kernel module: ctcm
  Failed to load kernel module: ctcm
    CTC device         : 0
  Loading required kernel module: lcs
  Failed to load kernel module: lcs
    LCS device         : 0
    Generic CCW device : 1
    Total              : 331
  QETH device 0.0.c003:0.0.c004:0.0.c005 configured
      Changes: online=1
      Network interface: encc003
  ubuntu at s4lp5:/sys/devices/qeth/0.0.c003$ cat bridge_role
  none
  ubuntu at s4lp5:/sys/devices/qeth/0.0.c003$

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