[Bug 1596968] Re: fail to activate fcp device for installation

[Dimitri John Ledkov]

Can you try to use cio_ignore during installation, and does that
mitigate this bug?

Specifically, can you use cio_ignore such that maximum number of visible
FCP devices is no more than 100?

Could you please notify Hendrik Brueckner about this bug report?

>From zfcp-config.c:

/* Debconf related definitions */
#define TEMPLATE_PREFIX "s390-zfcp/"
#define DEBCONF_CAPS    "backup"
#define PRESEED_DELIM   ","
#define SCSI_ASYNC_TRIES        15
#define SCSI_ASYNC_TIMEOUT      250000    /* useconds */
#define MAX_HOST_LIST_ITEMS     100
#define MAX_HOST_LIST_SIZE      (MAX_HOST_LIST_ITEMS * (9 + 20 +1))
#define MAX_LUN_LIST_SIZE       2048

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https://bugs.launchpad.net/bugs/1596968

Title:
  fail to activate fcp device for installation

Status in Ubuntu on IBM z Systems:
  New
Status in s390-zfcp package in Ubuntu:
  New

Bug description:
  == Comment: #0 - XIANG ZHANG  - 2016-06-20 09:28:02 ==
  ---Problem Description---
  Can not activate FCP devices for installation
   
  ---uname output---
  Linux ilablnx3 4.4.0-24-generic #43-Ubuntu SMP Wed Jun 8 19:26:02 UTC 2016 s390x s390x s390x GNU/Linux
   
  Machine Type = z13 lpar 
   
  ---boot type---
  Network boot
   
  ---Install repository type---
  Local repository
   
  ---Install repository Location---
  9.11.56.168:/OS_IMAGE/ISO/ubuntu/s390
   
  ---Point of failure---
  Other failure during installation (stage 1)

  I am installing a sanboot s390 ubuntu server via ftp server on a
  native lpar.  But I am not able to activate fcp device for
  installation. However I am able active the fcp device and attach san
  boot lun via shell.

  echo  1 > /sys/bus/ccw/driver/zfcp/0.0.1800/online
  echo 0x0000000000000000 > /sys/bus/ccw/driver/zfcp/0.0.1800/0x5005076802401ee8/unit_add

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