[LU-7534] Fix Lustre build against installed ZFS/SPL DKMS packages

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.8.0
• Labels: llnl patch
• Severity: 3
• Assignee: Nathaniel Clark
• Reporter: Christopher Morrone (Inactive)

Description

The current method to build against DKMS installs of ZFS and SPL
assumes directories like this:

   /var/lib/dkms/spl/${VERSION}/build
   /var/lib/dkms/zfs/${VERSION}/build

Unfortunately, that "build" directory was really just a temporary
step in the DKMS build process. Older versions of DKMS forgot to
clean up that directory, but in RHEL7 at least, DKMS no longer
leaves that around.

Instead we need to look in these places for source code:

  /var/lib/dkms/spl/${VERSION}/source
  /var/lib/dkms/zfs/${VERSION}/source

and in these places for the per-kernel object info:

  /var/lib/dkms/spl/${VERSION}/${LINUXRELEASE}/${target_cpu}
  /var/lib/dkms/zfs/${VERSION}/${LINUXRELEASE}/${target_cpu}

The changes in this patch update the Lustre build system to
look in those corrected directories for DKMS builds of SPL
and ZFS.

Issue Links

• is related to: LU-3953 lustre build system improvments

Comments

[Gerrit Updater]

Oleg Drokin ([e-mail]) merged in patch http://review.whamcloud.com/17536/
Subject: LU-7534 build: Allow lustre to build against ZFS/SPL DKMS install
Project: fs/lustre-release
Branch: master
Current Patch Set:
Commit: f9602738d023e17e25a004e166e0f41c000d97dc

[Nathaniel Clark]

Patch looks good on it's face. Will be testing build of #17536

[Christopher Morrone (Inactive)]

I presume you refer to

I didn't bother to look into where they changed the DKMS code, but yes, that does look like the place that it happened.

[Peter Jones]

Nathaniel

Could you please take care of this patch?

Thanks

Peter

[Bruno Faccini (Inactive)]

Hello Chris,
I presume you refer to http://linux.dell.com/cgi-bin/cgit.cgi/dkms.git/commit/?id=2ea43f6108558849125cc1d66902d6992ee3fe39 bug+change in DKMS?
Well, looks like this has been hidden since quite a long time due to specifying the real path, using "--with-[zfs,spl]=<path>" configure options, in our own build/DKMS frameworks usage.

[Gerrit Updater]

Christopher J. Morrone ([e-mail]) uploaded a new patch: http://review.whamcloud.com/17536
Subject: LU-7534 build: Allow lustre to build against ZFS/SPL DKMS install
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: 771001b191261234c90a3e3caf9297e137928637