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Bug 1349253 - "90kernel-modules" doesn't handle nfs host fstype properly
Summary: "90kernel-modules" doesn't handle nfs host fstype properly
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: dracut
Version: 7.3
Hardware: Unspecified
OS: Linux
unspecified
medium
Target Milestone: rc
: ---
Assignee: Lukáš Nykrýn
QA Contact: Release Test Team
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2016-06-23 04:54 UTC by Xunlei Pang
Modified: 2023-09-14 03:27 UTC (History)
6 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2016-11-04 08:05:40 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2016:2530 0 normal SHIPPED_LIVE dracut bug fix and enhancement update 2016-11-03 14:17:01 UTC

Description Xunlei Pang 2016-06-23 04:54:51 UTC 
Description of problem:
In 90kernel-modules/module-setup.sh installkernel(), dracut tries to instmods all "host_fs_types" with hostonly unset, this is useful for the fs target not mounted beforehand under hostonly mode (for example, using --mount to add some mount target). This works properly for most host fstypes(ext[234]/xfs, etc) except nfs.

Version-Release number of selected component (if applicable):
latest version

How reproducible:


Steps to Reproduce:
1.
2.
3.

Actual results:


Expected results:


Additional info:
From nfs manpage, we can clearly see that:
"The fstype field contains "nfs". Use of the "nfs4" fstype in /etc/fstab is deprecated."

It means "nfs" specified can be actually mounted as "nfs[3-4]", so for these cases, the current 90kernel-modules implementation only installs ko modules for "nfs"(nfs.ko, etc), lacking nfsv[3-4].ko, so it cannot work properly.
Comment 1 Xunlei Pang 2016-06-23 05:03:07 UTC 
There is a posted patch about this issue:
https://github.com/dracutdevs/dracut/compare/master...dracut-mailing-devs:1465983624-12964-1-git-send-email-xlpang%40redhat.com
Comment 3 Harald Hoyer 2016-07-21 09:03:18 UTC 
(In reply to Xunlei Pang from comment #1)
> There is a posted patch about this issue:
> https://github.com/dracutdevs/dracut/compare/master...dracut-mailing-devs:
> 1465983624-12964-1-git-send-email-xlpang%40redhat.com

I would solve this by changing modules.d/95nfs/module-setup.sh:

installkernel() {
    instmods nfs sunrpc ipv6 nfsv2 nfsv3 nfsv4 nfs_acl nfs_layout_nfsv41_files
}

to

installkernel() {
     hostonly='' instmods nfs sunrpc ipv6 nfsv2 nfsv3 nfsv4 nfs_acl nfs_layout_nfsv41_files
}


What do you think?
Comment 4 Xunlei Pang 2016-07-21 09:31:25 UTC 
(In reply to Harald Hoyer from comment #3)
> (In reply to Xunlei Pang from comment #1)
> > There is a posted patch about this issue:
> > https://github.com/dracutdevs/dracut/compare/master...dracut-mailing-devs:
> > 1465983624-12964-1-git-send-email-xlpang%40redhat.com
> 
> I would solve this by changing modules.d/95nfs/module-setup.sh:
> 
> installkernel() {
>     instmods nfs sunrpc ipv6 nfsv2 nfsv3 nfsv4 nfs_acl
> nfs_layout_nfsv41_files
> }
> 
> to
> 
> installkernel() {
>      hostonly='' instmods nfs sunrpc ipv6 nfsv2 nfsv3 nfsv4 nfs_acl
> nfs_layout_nfsv41_files
> }
> 
> 
> What do you think?

If "nfs" is added, then we add the related kernel modules forcely. This is helpful for kdump special unmounted nfs dumping, I'm fine with this modification, thanks!
Comment 6 Xunlei Pang 2016-07-25 17:21:04 UTC 
(In reply to Xunlei Pang from comment #4)
> (In reply to Harald Hoyer from comment #3)
> > (In reply to Xunlei Pang from comment #1)
> > > There is a posted patch about this issue:
> > > https://github.com/dracutdevs/dracut/compare/master...dracut-mailing-devs:
> > > 1465983624-12964-1-git-send-email-xlpang%40redhat.com
> > 
> > I would solve this by changing modules.d/95nfs/module-setup.sh:
> > 
> > installkernel() {
> >     instmods nfs sunrpc ipv6 nfsv2 nfsv3 nfsv4 nfs_acl
> > nfs_layout_nfsv41_files
> > }
> > 
> > to
> > 
> > installkernel() {
> >      hostonly='' instmods nfs sunrpc ipv6 nfsv2 nfsv3 nfsv4 nfs_acl
> > nfs_layout_nfsv41_files
> > }
> > 
> > 
> > What do you think?
> 
> If "nfs" is added, then we add the related kernel modules forcely. This is
> helpful for kdump special unmounted nfs dumping, I'm fine with this
> modification, thanks!

BTW, could you please help back port the changes to fedora dracut?
Because I have a rhel7 kdump issue depending on this bug, but we must resolve it in fedora first, then back port fedora's fixes to rhel7.

Thanks!
Comment 7 Michal Kovarik 2016-08-09 11:18:19 UTC 
Patch from comment 3 is included in dracut-033-450.el7. Verifying as SanityOnly.
Comment 9 errata-xmlrpc 2016-11-04 08:05:40 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHBA-2016-2530.html
Comment 10 Red Hat Bugzilla 2023-09-14 03:27:13 UTC 
The needinfo request[s] on this closed bug have been removed as they have been unresolved for 1000 days
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