GNU bug report logs - #41935
tail: unrecognized file system type 0x786f4256

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Pausch Manfred <Manfred.Pausch <at> tgw-group.com>
To: "bug-coreutils <at> gnu.org" <bug-coreutils <at> gnu.org>
Subject: tail: unrecognized file system type 0x786f4256
Date: Thu, 18 Jun 2020 15:57:32 +0000

[Message part 1 (text/plain, inline)]

Hello

When I tail a logfile that’s located on a VirtualBox guest shared folder than I get this message:

tail: unrecognized file system type 0x786f4256 for ‘oracle_12102_PSU190716-20200618_174315.log’. please report this to bug-coreutils <at> gnu.org. reverting to polling

My setup:
VirtualBox Guest: Oracle Linux 7.x
VirtualBox Host: Windows 10

A directory on the host is mapped into the guest via VirtualBox shared folder and mounted in the guest.
The process that writes to the logfile runs inside the guest. And tail that follows the logfile also runs inside the guest.

Regards

[Message part 2 (text/html, inline)]

Message #8 received at 41935 <at> debbugs.gnu.org (full text, mbox):

From: Pausch Manfred <Manfred.Pausch <at> tgw-group.com>
To: "41935 <at> debbugs.gnu.org" <41935 <at> debbugs.gnu.org>
Subject: AW: bug#41935: Acknowledgement (tail: unrecognized file system type
 0x786f4256)
Date: Fri, 19 Jun 2020 07:31:05 +0000

Sorry, forgot version of coreutils / tail:

$ tail --version
tail (GNU coreutils) 8.22

Message #11 received at 41935 <at> debbugs.gnu.org (full text, mbox):

From: Bernhard Voelker <mail <at> bernhard-voelker.de>
To: Pausch Manfred <Manfred.Pausch <at> tgw-group.com>, 41935 <at> debbugs.gnu.org
Subject: Re: bug#41935: tail: unrecognized file system type 0x786f4256
Date: Sat, 20 Jun 2020 16:15:07 +0200

[Message part 1 (text/plain, inline)]

On 2020-06-18 17:57, Pausch Manfred wrote:
> Hello
> 
> When I tail a logfile that’s located on a VirtualBox guest shared folder than I get this message:
> 
> tail: unrecognized file system type 0x786f4256 for ‘oracle_12102_PSU190716-20200618_174315.log’. please report this to bug-coreutils <at> gnu.org. reverting to polling
> 
> My setup:
> VirtualBox Guest: Oracle Linux 7.x
> VirtualBox Host: Windows 10
> 
> A directory on the host is mapped into the guest via VirtualBox shared folder and mounted in the guest.
> The process that writes to the logfile runs inside the guest. And tail that follows the logfile also runs inside the guest.

Thanks for the report.
It's unusual that this FS-type slipped through for so long.
The attached fixes it.

An internet search unveils that inotify does not seem to work reliably
for 'vboxsf', and I think that this cannot really reliably work, e.g. if a Windows
host exposes a directory on a CIFS share into a Linux guest VM (which works, I tried).
Therefore, I've marked 'vboxsf' as a 'remote' file system which uses polling.

Have a nice day,
Berny

[0001-stat-tail-add-support-for-the-VBOXSF-file-system.patch (text/x-patch, attachment)]

Message #14 received at 41935 <at> debbugs.gnu.org (full text, mbox):

From: Pádraig Brady <P <at> draigBrady.com>
To: Bernhard Voelker <mail <at> bernhard-voelker.de>,
 Pausch Manfred <Manfred.Pausch <at> tgw-group.com>, 41935 <at> debbugs.gnu.org
Subject: Re: bug#41935: tail: unrecognized file system type 0x786f4256
Date: Sat, 20 Jun 2020 18:28:00 +0100

On 20/06/2020 15:15, Bernhard Voelker wrote:
> On 2020-06-18 17:57, Pausch Manfred wrote:
>> Hello
>>
>> When I tail a logfile that’s located on a VirtualBox guest shared folder than I get this message:
>>
>> tail: unrecognized file system type 0x786f4256 for ‘oracle_12102_PSU190716-20200618_174315.log’. please report this to bug-coreutils <at> gnu.org. reverting to polling
>>
>> My setup:
>> VirtualBox Guest: Oracle Linux 7.x
>> VirtualBox Host: Windows 10
>>
>> A directory on the host is mapped into the guest via VirtualBox shared folder and mounted in the guest.
>> The process that writes to the logfile runs inside the guest. And tail that follows the logfile also runs inside the guest.
> 
> Thanks for the report.
> It's unusual that this FS-type slipped through for so long.
> The attached fixes it.
> 
> An internet search unveils that inotify does not seem to work reliably
> for 'vboxsf', and I think that this cannot really reliably work, e.g. if a Windows
> host exposes a directory on a CIFS share into a Linux guest VM (which works, I tried).
> Therefore, I've marked 'vboxsf' as a 'remote' file system which uses polling.

+1

thanks

Message #17 received at 41935 <at> debbugs.gnu.org (full text, mbox):

From: Bernhard Voelker <mail <at> bernhard-voelker.de>
To: Pádraig Brady <P <at> draigBrady.com>,
 Pausch Manfred <Manfred.Pausch <at> tgw-group.com>, 41935 <at> debbugs.gnu.org
Subject: Re: bug#41935: tail: unrecognized file system type 0x786f4256
Date: Sun, 21 Jun 2020 00:01:37 +0200

On 2020-06-20 19:28, Pádraig Brady wrote:
> +1

Thanks for the review, pushed at:
https://git.sv.gnu.org/cgit/coreutils.git/commit/?id=f5644c986ce

Have a nice day,
Berny

Message #22 received at 41935-done <at> debbugs.gnu.org (full text, mbox):

From: Bernhard Voelker <mail <at> bernhard-voelker.de>
To: 41935-done <at> debbugs.gnu.org
Subject: Re: bug#41935: tail: unrecognized file system type 0x786f4256
Date: Sun, 21 Jun 2020 00:02:39 +0200

marking this as done.

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