From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1C1E672608 for ; Fri, 13 Jun 2025 20:08:50 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1749845331; cv=none; b=qVEBGDFMduEj6gXvSLRtuMme+GetAqHkc/moHfs7n4vMk0XlvVIWXzrs1MlfHL7j35xjWC099H0gRYOF0xIxvlfYbn34vmqQvFwtFn4+ocFo3eoElf2GiIP0iG7Vdh1wftr8/y0z+ljOxRfmyYq/uPQH7Cm9McEbnp4d47qjYGM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1749845331; c=relaxed/simple; bh=u8/oqRxj4kMvwHqQVRHLh6Wn9sljlOgzbahR15cu+EE=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=FN8f7EzmhAmZfjZwMcXJRdDWL01xSgjtRGzuLIGtpnATwhnQFxqFWliAv7RHavtlwMyqnsBaPxHmjVrIP9ci240XQ1H4EOd04ixnB3dj1PzJOhdrbkpgj23KdLaIpO/RlDzQyAfKbMCrefRhUn2MjEkii9jqVnLtVWxlGBDDClQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Lm6vApVF; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="Lm6vApVF" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E9810C4CEE3; Fri, 13 Jun 2025 20:08:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1749845330; bh=u8/oqRxj4kMvwHqQVRHLh6Wn9sljlOgzbahR15cu+EE=; h=From:To:Cc:Subject:Date:From; b=Lm6vApVFcQRFpGFVEiG+Gh8cTH2gbXjrKNthFKA4fqFR/fMPwKhzXIvE2BbpDAHVh tIX6aRkA1ZfREEADCnrZsv4z8qYaqquvTd56XrS6QZKRDISeKT93EDLC24ghfXgKqO RGFIN8nESBAsG08yf8qePdX8YK4vgeGN/NZ4m474Ped1FJ6J39BI3b6nAq+8Bh9f5P iMVW4rs5FzSF9TRFG23YYaQ92vyQJJp+jRdVKdK5k0pZicU3zLu/i9qZwlbvu0/5L8 VbxrHY4/45Q+sjOmNCB4VyjTedxvZa1qi+B6//gu/vQCFKPsU9wm9VyslOuEzbbVQ/ RA+8PlUl1NNXQ== From: Chuck Lever To: NeilBrown , Jeff Layton , Olga Kornievskaia , Dai Ngo , Tom Talpey Cc: , Chuck Lever Subject: [RFC PATCH v2 0/2] Make NFSD use the vfs_iocb_iter APIs Date: Fri, 13 Jun 2025 16:08:45 -0400 Message-ID: <20250613200847.7155-1-cel@kernel.org> X-Mailer: git-send-email 2.49.0 Precedence: bulk X-Mailing-List: linux-nfs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Chuck Lever Mike has expressed interest in making NFSD perform direct, uncached, or asynchronous I/O, independent of how the target file might have been opened by the file cache. To do that, the idea is to pass in RWF_ flags during each VFS read and write. However, Christoph suggested APIs that already exist which streamline the I/O operation a bit and expose the per-I/O flag setting directly. The suggestion looks to me like a straightforward and sensible general clean up of these code paths. This series refactors nfsd_iter_read() and nfsd_vfs_write() to use those APIs instead of vfs_iter_read() and vfs_iter_write(), respectively, as a first baby step down this path. No behavior change is expected. Chuck Lever (2): NFSD: Use vfs_iocb_iter_read() NFSD: Use vfs_iocb_iter_write() fs/nfsd/vfs.c | 19 ++++++++++++------- 1 file changed, 12 insertions(+), 7 deletions(-) -- 2.49.0