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From: David Sterba <dsterba@suse.cz>
To: Anand Jain <anand.jain@oracle.com>
Cc: David Sterba <dsterba@suse.com>, linux-btrfs@vger.kernel.org
Subject: Re: [PATCH 0/6] Support resize and device delete cancel ops
Date: Wed, 15 Dec 2021 16:13:13 +0100	[thread overview]
Message-ID: <20211215151313.GZ28560@twin.jikos.cz> (raw)
In-Reply-To: <8af5cc22-bc1f-907b-2447-d60f9587c887@oracle.com>

On Tue, Dec 14, 2021 at 10:49:37PM +0800, Anand Jain wrote:
> 
> On 21/05/2021 20:06, David Sterba wrote:
> > We don't have a nice interface to cancel the resize or device deletion
> > from a command. Since recently, both commands can be interrupted by a
> > signal, which also means Ctrl-C from terminal, but given the long
> > history of absence of the commands I think this is not yet well known.
> > 
> > Examples:
> > 
> >    $ btrfs fi resize -10G /mnt
> >    ...
> >    $ btrfs fi resize cancel /mnt
> > 
> >    $ btrfs device delete /dev/sdx /mnt
> >    ...
> >    $ btrfs device delete cancel /mnt
> 
> 
> David,
> 
> These cancel commands don't fail with un-supported ioctl error codes on 
> the older kernels as we didn't define a new ioctl for this purpose.
> 
> Generally, the latest btrfs-progs are compatible with the older kernels, 
> especially useful for the fsck fixes.
> 
> Moving forward does the newer btrfs-progs version will continue to be 
> compatible with the older kernels?

Yes, the compatibility of old kernel and new (latest) progs is supposed
to be maintained, eg. by adding checks for supported features or if the
ioctls work, version check is the last resort.

      reply	other threads:[~2021-12-15 15:13 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-21 12:06 David Sterba
2021-05-21 12:06 ` [PATCH 1/6] btrfs: protect exclusive_operation by super_lock David Sterba
2021-05-21 13:37   ` Josef Bacik
2021-05-21 12:06 ` [PATCH 2/6] btrfs: add cancelable chunk relocation support David Sterba
2021-05-21 13:21   ` Josef Bacik
2021-05-26 22:56     ` David Sterba
2021-06-16 13:54   ` Filipe Manana
2021-06-16 13:55     ` Filipe Manana
2021-06-16 15:53       ` David Sterba
2021-06-16 15:58       ` [PATCH v2] btrfs: add cancellable " David Sterba
2021-06-17  9:18         ` Filipe Manana
2021-05-21 12:06 ` [PATCH 3/6] btrfs: introduce try-lock semantics for exclusive op start David Sterba
2021-05-21 13:38   ` Josef Bacik
2021-05-27  7:43   ` Anand Jain
2021-05-28 12:30     ` David Sterba
2021-05-29 13:48       ` Anand Jain
2021-05-31 18:23         ` David Sterba
2021-05-21 12:06 ` [PATCH 4/6] btrfs: add wrapper for conditional start of exclusive operation David Sterba
2021-05-21 13:29   ` Josef Bacik
2021-05-21 16:45     ` David Sterba
2021-05-26 22:24       ` David Sterba
2021-05-21 12:06 ` [PATCH 5/6] btrfs: add cancelation to resize David Sterba
2021-05-21 13:38   ` Josef Bacik
2021-05-21 12:06 ` [PATCH 6/6] btrfs: add device delete cancel David Sterba
2021-05-21 13:38   ` Josef Bacik
2021-05-21 12:06 ` [PATCH 1/2] btrfs-progs: device remove: add support for cancel David Sterba
2021-05-21 12:06 ` [PATCH 2/2] btrfs-progs: fi resize: " David Sterba
2021-12-14 14:49 ` [PATCH 0/6] Support resize and device delete cancel ops Anand Jain
2021-12-15 15:13   ` David Sterba [this message]

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