[Bug 1206387] Re: openafs-modules-dkms 1.6.1-1+ubuntu0.2: module FTBFS on 3.8.0

Wed May 28 18:49:07 UTC 2014

This system has been removed and the fils all backed up for futurew use of a new install. Thanks for the support Rafael.

Stephen Corbin
bigredsshop at aol.com

-----Original Message-----
From: Rafael David Tinoco <rafael.tinoco at canonical.com>
To: bigredsshop <bigredsshop at aol.com>
Sent: Tue, May 27, 2014 8:11 am
Subject: [Bug 1206387] Re: openafs-modules-dkms 1.6.1-1+ubuntu0.2: module FTBFS on 3.8.0

After this discussion (and some other customers/users requests on the
same bug), knowing that the 1.6.5 backport was not eligible for a SRU
(just like Steve pointed out) I started to cherry-pick code from openafs
1.6.5 to openafs 1.6.1, so the openafs dkms module was able to compile
on HWE kernels.

With that I could see that this approach would also not result in a
eligible RSU. There are too many changes from kernel 3.2 to kernel 3.11
and openafs has a huge amount of pre-defined code based on these changes
(Rightly pointed out by Anders).

After fixing some wrongly auto-generated includes, I could see that
there were 2 approaches for bringing 1.6.5 behavior to 1.6.1:

1) Remove "STRUCT_TASK_STRUCT_HAS_CRED" define. Autotools is correctly
checking for the existence of a "credentials" structure inside
task_struct (kernel). Since newer kernels (3.x) have this structure, the
code defines STRUCT_TASK_STRUCT_HAS_CRED variable and starts accessing
all credential variables directly from kernel defined structures
(includes). Removing this would make openafs behave like it used to in
the past (older kernels from 2.6.x) and would imply fixing all
"current_task"->cred structure (changing upstream code on that specific
version). Of course, after this, even more changes would be expected.

-> not a good approach

2) Cherry-pick code from 1.6.5 to 1.6.1. There are 398 commits between
this two versions and, taking in consideration only dkms module, this
could be a reasonable direction. The problem is that since there are a
huge amount of changes in the kernel structures for process, sched,
security (between v3.2 and v3.11) the changes wouldn't be acceptable on
SRU.

Some of needed changes would be: dentry_open new prototype, kmap_atomic
new prototype, vmtruncated deprecated, task_struct cred session_keyring
location, new proc_create function on module, and so on...

-> not a good approach also

* see next comment

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Title:
  openafs-modules-dkms 1.6.1-1+ubuntu0.2: module FTBFS on 3.8.0

Status in “openafs” package in Ubuntu:
  Invalid
Status in “openafs” source package in Precise:
  In Progress

Bug description:
  [Impact]
  Since the backported Raring kernel 3.8 was released into Precise and is 
installed by default, OpenAFS cannot be installed on Precise.  The out-of-tree 
OpenAFS kernel module needs to be upgraded to support kernel 3.8.

  This happened before for the backported Quantal kernel 3.5 (bug
  1015925), but this time so many patches are needed that it’s less
  risky to take a new upstream stable release, which is already well-
  tested, than to try to decide which patches to cherry-pick.

  [Test Case]
  apt-get install openafs-modules-dkms
  (This should succeed on all supported Precise kernels, 3.2, 3.5, and 3.8.)

  [Regression Potential]
  OpenAFS 1.6.5 has been well-tested in the OpenAFS PPA https://launchpad.net/~openafs/+archive/stable, 
which has many users at MIT.  The 1.6.x series is focused on important bug fixes 
and new kernel support (with main development happening on the master branch 
that will become 1.8.x, and Windows development happening on 1.7.x).

  ProblemType: Package
  DistroRelease: Ubuntu 12.04
  Package: openafs-modules-dkms 1.6.1-1+ubuntu0.2
  ProcVersionSignature: Ubuntu 3.5.0-37.58~precise1-generic 3.5.7.16
  Uname: Linux 3.5.0-37-generic x86_64
  NonfreeKernelModules: openafs
  ApportVersion: 2.0.1-0ubuntu17.3
  Architecture: amd64
  DKMSKernelVersion: 3.8.0-27-generic
  Date: Tue Jul 30 02:32:14 2013
  InstallationMedia: Ubuntu 12.04.2 LTS "Precise Pangolin" - Release amd64 
(20130214)
  MarkForUpload: True
  PackageArchitecture: all
  PackageVersion: 1.6.1-1+ubuntu0.2
  SourcePackage: openafs
  Title: openafs-modules-dkms 1.6.1-1+ubuntu0.2: openafs kernel module failed to 
build
  UpgradeStatus: No upgrade log present (probably fresh install)

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Title:
  openafs-modules-dkms 1.6.1-1+ubuntu0.2: module FTBFS on 3.8.0

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