Bug#1063338: dlm: cannot start dlm midcomms -97

From	Valentin Kleibel <valentin@vrvis.at>
Newsgroups	linux.debian.bugs.dist, linux.debian.kernel
Subject	Bug#1063338: dlm: cannot start dlm midcomms -97
Date	2024-02-06 13:10 +0100
Message-ID	<I4sr0-8hwn-5@gated-at.bofh.it> (permalink)
Organization	linux.* mail to news gateway

Cross-posted to 2 groups.

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Package: linux-image-amd64
Version: 6.1.76+1
Source: linux
Source-Version: 6.1.76+1
Severity: important
Control: notfound -1 6.6.15-2

Dear Maintainers,

We discovered a bug affecting dlm that prevents any tcp communications 
by dlm when booted with debian kernel 6.1.76-1.

Dlm startup works (corosync-cpgtool shows the dlm:controld group with 
all expected nodes) but as soon as we try to add a lockspace dmesg shows:
```
dlm: Using TCP for communications
dlm: cannot start dlm midcomms -97
```

It seems that commit "dlm: use kernel_connect() and kernel_bind()" 
(e9cdebbe) was merged to 6.1.

Checking the code it seems that the changed function 
dlm_tcp_listen_bind() fails with exit code 97 (EAFNOSUPPORT)
It is called from

dlm/lockspace.c: threads_start() -> dlm_midcomms_start()
dlm/midcomms.c: dlm_midcomms_start() -> dlm_lowcomms_start()
dlm/lowcomms.c: dlm_lowcomms_start() -> dlm_listen_for_all() -> 
dlm_proto_ops->listen_bind() = dlm_tcp_listen_bind()

The error code is returned all the way to threads_start() where the 
error message is emmitted.

Booting with the unsigned kernel from testing (6.6.15-2), which also 
contains this commit, works without issues.

I'm not sure what additional changes are required to get this working or 
if rolling back this change is an option.

We'd be happy to test patches that might fix this issue.

Thanks for your help,
Valentin

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Thread

Bug#1063338: dlm: cannot start dlm midcomms -97 Valentin Kleibel <valentin@vrvis.at> - 2024-02-06 13:10 +0100
  Bug#1063338: [regression 6.1.67] dlm: cannot start dlm midcomms -97 after backport of e9cdebbe23f1 ("dlm: use kernel_connect() and kernel_bind()") Salvatore Bonaccorso <carnil@debian.org> - 2024-02-07 11:50 +0100
    Bug#1063338: [regression 6.1.67] dlm: cannot start dlm midcomms -97 after backport of e9cdebbe23f1 ("dlm: use kernel_connect() and kernel_bind()") Jordan Rife <jrife@google.com> - 2024-02-07 19:40 +0100
      Bug#1063338: [regression 6.1.67] dlm: cannot start dlm midcomms -97 after backport of e9cdebbe23f1 ("dlm: use kernel_connect() and kernel_bind()") Alexander Aring <aahringo@redhat.com> - 2024-02-07 22:40 +0100
  Bug#1063338: [regression 6.1.76] dlm: cannot start dlm midcomms -97 after backport of e9cdebbe23f1 ("dlm: use kernel_connect() and kernel_bind()") Jordan Rife <jrife@google.com> - 2024-02-08 18:50 +0100
    Bug#1063338: [regression 6.1.76] dlm: cannot start dlm midcomms -97 after backport of e9cdebbe23f1 ("dlm: use kernel_connect() and kernel_bind()") Jordan Rife <jrife@google.com> - 2024-02-08 22:30 +0100
      Bug#1063338: [regression 6.1.76] dlm: cannot start dlm midcomms -97 after backport of e9cdebbe23f1 ("dlm: use kernel_connect() and kernel_bind()") Valentin Kleibel <valentin@vrvis.at> - 2024-02-09 12:10 +0100
        Bug#1063338: [regression 6.1.76] dlm: cannot start dlm midcomms -97 after backport of e9cdebbe23f1 ("dlm: use kernel_connect() and kernel_bind()") Jordan Rife <jrife@google.com> - 2024-02-09 17:40 +0100
  Bug#1063338: dlm: cannot start dlm midcomms -97 Salvatore Bonaccorso <carnil@debian.org> - 2024-02-19 21:10 +0100
  Processed: Re: Bug#1063338: dlm: cannot start dlm midcomms -97 "Debian Bug Tracking System" <owner@bugs.debian.org> - 2024-02-19 21:10 +0100

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