linux-kernel - Re: [PATCH] lockd: don't allow locking on reexported NFSv2/3

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Message-ID: <176131386154.34431.8507848314830746497.b4-ty@oracle.com>
Date: Fri, 24 Oct 2025 09:51:08 -0400
From: Chuck Lever <cel@...nel.org>
To: NeilBrown <neil@...wn.name>,
	Olga Kornievskaia <okorniev@...hat.com>,
	Dai Ngo <Dai.Ngo@...cle.com>,
	Tom Talpey <tom@...pey.com>,
	Trond Myklebust <trondmy@...nel.org>,
	Anna Schumaker <anna@...nel.org>,
	Jeff Layton <jlayton@...nel.org>
Cc: Chuck Lever <chuck.lever@...cle.com>,
	Mike Snitzer <snitzer@...nel.org>,
	linux-nfs@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] lockd: don't allow locking on reexported NFSv2/3

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

On Thu, 23 Oct 2025 09:12:39 -0400, Jeff Layton wrote:
> Since commit 9254c8ae9b81 ("nfsd: disallow file locking and delegations
> for NFSv4 reexport"), file locking when reexporting an NFS mount via
> NFSv4 is expressly prohibited by nfsd. Do the same in lockd:
> 
> Add a new  nlmsvc_file_cannot_lock() helper that will test whether file
> locking is allowed for a given file, and return nlm_lck_denied_nolocks
> if it isn't.
> 
> [...]

Applied to nfsd-testing, thanks!

[1/1] lockd: don't allow locking on reexported NFSv2/3
      commit: 49d93cbe598561458a1da11dceb2e26891d019e3

--
Chuck Lever