linux-kernel - Re: [PATCH 5/5] 9p: Use length of data written to the server in preference to error

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Message-ID: <ZZW5nlB5v-SDsT_P@codewreck.org>
Date: Thu, 4 Jan 2024 04:46:38 +0900
From: Dominique Martinet <asmadeus@...ewreck.org>
To: David Howells <dhowells@...hat.com>
Cc: Christian Brauner <christian@...uner.io>,
	Jeff Layton <jlayton@...nel.org>,
	Gao Xiang <hsiangkao@...ux.alibaba.com>,
	Steve French <smfrench@...il.com>,
	Matthew Wilcox <willy@...radead.org>,
	Marc Dionne <marc.dionne@...istor.com>,
	Paulo Alcantara <pc@...guebit.com>,
	Shyam Prasad N <sprasad@...rosoft.com>, Tom Talpey <tom@...pey.com>,
	Eric Van Hensbergen <ericvh@...nel.org>,
	Ilya Dryomov <idryomov@...il.com>, linux-cachefs@...hat.com,
	linux-afs@...ts.infradead.org, linux-cifs@...r.kernel.org,
	linux-nfs@...r.kernel.org, ceph-devel@...r.kernel.org,
	v9fs@...ts.linux.dev, linux-erofs@...ts.ozlabs.org,
	linux-fsdevel@...r.kernel.org, linux-mm@...ck.org,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	Latchesar Ionkov <lucho@...kov.net>,
	Christian Schoenebeck <linux_oss@...debyte.com>
Subject: Re: [PATCH 5/5] 9p: Use length of data written to the server in
 preference to error

David Howells wrote on Wed, Jan 03, 2024 at 02:59:29PM +0000:
> In v9fs_upload_to_server(), we pass the error to netfslib to terminate the
> subreq rather than the amount of data written - even if we did actually
> write something.
> 
> Further, we assume that the write is always entirely done if successful -
> but it might have been partially complete - as returned by
> p9_client_write(), but we ignore that.
> 
> Fix this by indicating the amount written by preference and only returning
> the error if we didn't write anything.
> 
> (We might want to return both in future if both are available as this
> might be useful as to whether we retry or not.)
> 
> Suggested-by: Dominique Martinet <asmadeus@...ewreck.org>

Thanks,

Acked-by: Dominique Martinet <asmadeus@...ewreck.org>

-- 
Dominique Martinet | Asmadeus