linux-kernel - Re: [PATCH] NFSD: Disallow layoutget during grace period

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Message-ID: <175708243820.6199.8033490028281613257.b4-ty@oracle.com>
Date: Fri,  5 Sep 2025 10:27:28 -0400
From: Chuck Lever <cel@...nel.org>
To: Jeff Layton <jlayton@...nel.org>,
	NeilBrown <neil@...wn.name>,
	Olga Kornievskaia <okorniev@...hat.com>,
	Dai Ngo <Dai.Ngo@...cle.com>,
	Tom Talpey <tom@...pey.com>,
	Sergey Bashirov <sergeybashirov@...il.com>
Cc: Chuck Lever <chuck.lever@...cle.com>,
	linux-nfs@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Konstantin Evtushenko <koevtushenko@...dex.com>
Subject: Re: [PATCH] NFSD: Disallow layoutget during grace period

From: Chuck Lever <chuck.lever@...cle.com>

On Mon, 25 Aug 2025 16:11:02 +0300, Sergey Bashirov wrote:
> When the server is recovering from a reboot and is in a grace period,
> any operation that may result in deletion or reallocation of block
> extents should not be allowed. See RFC 8881, section 18.43.3.
> 
> If multiple clients write data to the same file, rebooting the server
> during writing may result in file corruption. In the worst case, the
> exported XFS may also become corrupted. Observed this behavior while
> testing pNFS block volume setup.
> 
> [...]

Applied to nfsd-testing, thanks!

[1/1] NFSD: Disallow layoutget during grace period
      commit: c4df20612a34b4713e81e0b3612a84481f6ae82e

--
Chuck Lever