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[Launchpad Bug Tracker <1668808@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package iscsitarget -
1.4.20.3+svn502-2ubuntu4.1

---------------
iscsitarget (1.4.20.3+svn502-2ubuntu4.1) xenial; urgency=medium

  * d/dkms.conf.in: iscsitarget has been removed from 16.10 and does not
    build against kernels from that release and on. Users are
    recommended to use the in-kernel iscsi_target_mod driver and tgt.
    Disable the dkms build on HWE kernels for 16.04 (LP: #1668808).

 -- Nishanth Aravamudan <nish.aravamudan@xxxxxxxxxxxxx>  Mon, 20 Mar
2017 17:22:23 -0700

** Changed in: iscsitarget (Ubuntu Xenial)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1668808

Title:
  [Xenial] iscsitarget-dkms 1.4.20.3+svn502-2ubuntu4: iscsitarget kernel
  module failed to build [error: field ‘rx_hash’ has incomplete type]

Status in iscsitarget package in Ubuntu:
  Invalid
Status in iscsitarget source package in Xenial:
  Fix Released
Status in iscsitarget source package in Yakkety:
  Invalid

Bug description:
  [Impact]

   * The src:iscsitarget package was removed from 16.10 (LP: #1613758).

   * Therefore, the iscsitarget-dkms package is no longer tested with
  16.10+ kernels to ensure it still compiles.

   * The HWE stacks for 16.04 backport the 16.10+ kernels to 16.04.x.

   * End users who successfully built the iscistarget driver on
  16.04.0/1 kernels (4.4.0-*) will see failures with the HWE kernels.

   * iscsitarget and iscsitarget-dkms packages are not technically
  needed on 16.04 at all. There is an iSCSI target driver
  (iscsi_target_mod) in the Ubuntu kernel and the iscistarget tooling
  can be replaced with tgt.

  [Test Case]

   * Install iscsitarget-dkms while having the 16.04.2 headers
  installed. The module build will fail (and apport if on a desktop will
  attempt to submit a bug report).

   * In the fixed case, iscsitarget-dkms will see the specified kernel
  is not supported by the regex and will skip attempting to build.

  [Regression Potential]

   * Currently, the iscsitarget-dkms throws an error. The error is
  actually in the use of iscsitarget-dkms at all with newer kernels, and
  hopefully if end-users depend on it and see the 'skipped' message,
  they will come to this bug via the changelog. I do not believe there
  is any regression potential, as I have tested that 4.4.0-* kernels
  still build the dkms module fine and that all other 16.04 kernel
  families skip it.

  ---

  I am unable to build the iscsitarget DKMS module on a fresh install of
  Ubuntu 16.04.2 LTS. Console output is replicated here; the associated
  make.log file is attached.

  Setting up iscsitarget-dkms (1.4.20.3+svn502-2ubuntu4) ...

  Creating symlink /var/lib/dkms/iscsitarget/1.4.20.3+svn502/source ->
                   /usr/src/iscsitarget-1.4.20.3+svn502

  DKMS: add completed.

  Kernel preparation unnecessary for this kernel.  Skipping...

  Building module:
  cleaning build area....
  make KERNELRELEASE=4.8.0-39-generic -C /lib/modules/4.8.0-39-generic/build M=/var/lib/dkms/iscsitarget/1.4.20.3+svn502/build....(bad exit status: 2)
  Error! Bad return status for module build on kernel: 4.8.0-39-generic (i686)
  Consult /var/lib/dkms/iscsitarget/1.4.20.3+svn502/build/make.log for more information.
  Removing old iscsitarget-1.4.20.3+svn502 DKMS files...

  ------------------------------
  Deleting module version: 1.4.20.3+svn502
  completely from the DKMS tree.
  ------------------------------
  Done.
  Loading new iscsitarget-1.4.20.3+svn502 DKMS files...
  First Installation: checking all kernels...
  Building only for 4.8.0-39-generic
  Building initial module for 4.8.0-39-generic
  ERROR: Cannot create report: [Errno 17] File exists: '/var/crash/iscsitarget-dkms.0.crash'
  Error! Bad return status for module build on kernel: 4.8.0-39-generic (i686)
  Consult /var/lib/dkms/iscsitarget/1.4.20.3+svn502/build/make.log for more information.

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