[Yum-devel] kernel-module plugin - problems during install

[Troy Dawson]

Hello,
I wanted to send in a patch, instead of just report a problem, but I've 
gotten stuck.

Software:
yum-2.4.2
kernel-module plugin, latest from yum-utils
Scientific Linux 4.2

Problem:
When trying to install a program that requires a kernel-module, a kernel 
module is selected, but it is not always for the correct kernel.  It 
then tries to install whichever kernel matches that kernel-module.
For upgrades, once the correct kernel-modules have been installed, work 
great, just like it's supposed to.

Example:
# rpm -q kernel
kernel-2.6.9-22.0.2.EL.i686
# uname -r
2.6.9-22.0.2.EL
# yum install openafs openafs-client
Loading "kernel-module" plugin
Setting up Install Process
Setting up repositories
Reading repository metadata in from local files
Excluding Packages from SL 4 base
Finished
Parsing package install arguments
Resolving Dependencies
--> Populating transaction set with selected packages. Please wait.
---> Package openafs-client.i386 0:1.4.0-8.SL set to be updated
---> Package openafs.i386 0:1.4.0-8.SL set to be updated
--> Running transaction check
--> Processing Dependency: openafs-kernel for package: openafs-client
--> Restarting Dependency Resolution with new changes.
--> Populating transaction set with selected packages. Please wait.
---> Package kernel-module-openafs-2.6.9-22.0.1.EL.i686 0:1.4.0-8.SL set 
to be updated
--> Running transaction check
--> Processing Dependency: /boot/vmlinuz-2.6.9-22.0.1.EL for package: 
kernel-module-openafs-2.6.9-22.0.1.EL
Importing Additional filelist information for dependency resolution
--> Restarting Dependency Resolution with new changes.
--> Populating transaction set with selected packages. Please wait.
---> Package kernel.i686 0:2.6.9-22.0.1.EL set to be installed
--> Running transaction check

Dependencies Resolved

=============================================================================
  Package                 Arch       Version          Repository        Size
=============================================================================
Installing:
  openafs                 i386       1.4.0-8.SL       sl-base 
5.6 M
  openafs-client          i386       1.4.0-8.SL       sl-base 
444 k
Installing for dependencies:
  kernel                  i686       2.6.9-22.0.1.EL  sl-base 
9.7 M
  kernel-module-openafs-2.6.9-22.0.1.EL  i686       1.4.0-8.SL 
sl-base           238 k

Transaction Summary
=============================================================================
Install      4 Package(s)
Update       0 Package(s)
Remove       0 Package(s)

As you can see, it's picking an older kernel-module, and then tries to 
install the older kernel that goes with it.

DEBUGGING SO FAR:
Well, not all the debugging, just what I think is important, but there 
might be something I missed.

# yum -d10 install openafs openafs-client
..snip...
Dep Number: 1/1
openafs-client requires: openafs-kernel
--> Processing Dependency: openafs-kernel for package: openafs-client
Requiring package is from transaction set
Resolving for requiring package: openafs-client-1.4.0-8.SL in state u
Resolving for requirement: openafs-kernel
Searching pkgSack for dep: openafs-kernel
Potential match for openafs-kernel from 
kernel-module-openafs-2.6.9-22.0.1.ELsmp - 1.4.0-8.SL.i686
Matched kernel-module-openafs-2.6.9-22.0.1.ELsmp - 1.4.0-8.SL.i686 to 
require for openafs-kernel
Potential match for openafs-kernel from 
kernel-module-openafs-2.6.9-22.0.1.EL - 1.4.0-8.SL.i686
Matched kernel-module-openafs-2.6.9-22.0.1.EL - 1.4.0-8.SL.i686 to 
require for openafs-kernel
Potential match for openafs-kernel from 
kernel-module-openafs-2.6.9-22.0.2.ELsmp - 1.4.0-8.SL.i686
Matched kernel-module-openafs-2.6.9-22.0.2.ELsmp - 1.4.0-8.SL.i686 to 
require for openafs-kernel
Potential match for openafs-kernel from 
kernel-module-openafs-2.6.9-22.0.2.EL - 1.4.0-8.SL.i686
Matched kernel-module-openafs-2.6.9-22.0.2.EL - 1.4.0-8.SL.i686 to 
require for openafs-kernel
TSINFO: Marking kernel-module-openafs-2.6.9-22.0.1.EL - 1.4.0-8.SL.i686 
as install for openafs-client
miss = 0
conf = 0
CheckDeps = 1
--> Restarting Dependency Resolution with new changes.
...snip...

As I go through the code, I the problem is in the kernels that are 
listed in the bit of code

     kernels = []
     for tsmem in ts.getMembers():
         if tsmem.ts_state == 'u' and tsmem.name in knames:
             kernels.append(tsmem.po)

This somehow isn't getting the right list of kernels needed so that when 
we look for dependancies

def find_kmodules(availpkgs, provides, kernels):
     matches = []
     for pkg in availpkgs:
         for kern in kernels:
             for prov in provides:
                 if pkg.name == "%s-%s" % (prov, kunamer(kern)):
                     if pkg.arch == kern.arch:
                         matches.append(pkg)
     return unique(matches)

Then it's only going through one kernel, which isn't even the right 
kernel.
But ... I could be wrong, and even if I'm right, I haven't been able to 
find out all the various states in tsmem.ts_state, which has made this 
harder to test various things.

Any help would be appreciated.
Thanks
Troy Dawson
-- 
__________________________________________________
Troy Dawson  dawson at fnal.gov  (630)840-6468
Fermilab  ComputingDivision/CSS  CSI Group
__________________________________________________