From patchwork Mon May 22 23:52:37 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dai Ngo X-Patchwork-Id: 13251258 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id A6C99C7EE2D for ; Tue, 23 May 2023 00:24:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235408AbjEWAYi (ORCPT ); Mon, 22 May 2023 20:24:38 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37316 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234451AbjEVX4t (ORCPT ); Mon, 22 May 2023 19:56:49 -0400 Received: from mx0b-00069f02.pphosted.com (mx0b-00069f02.pphosted.com [205.220.177.32]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C650E2125; Mon, 22 May 2023 16:52:56 -0700 (PDT) Received: from pps.filterd (m0246630.ppops.net [127.0.0.1]) by mx0b-00069f02.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 34MKNsVe001958; Mon, 22 May 2023 23:52:53 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=from : to : cc : subject : date : message-id; s=corp-2023-03-30; bh=IKJkCOccVzLu6kohxV9I79caIQhey6LTKOR4b88i/IU=; b=3UJqX2XZ6j0UBhzLIZNQ9lmrVhrAYUAVXnHMxqkynXI9OasWnBEcNIjIC2/LbJXJqrt/ FIR6hZIOA6KKiJQpdjI3LrSgoepG+7/eZ0L+iWy68LiP2J9J6h/4roh0c3KnZfJvi/T+ H/v1dIluN2YehVetJU54XDaczryUpq8wNkWTgJkkUEn3uCgDlZyF38YvdOtfj0tFrz5i sfCykymZr0m98jM9b1u6u9wRG0ETKPaTPpCEqVC7sxvE2kqoEws4cHEEoAuYCOkpW7+e 9hsYfh/z8rtRiw2LoDLmWWxOi3MbXHavtpKQbq2zDeqbYOY0+KTjYKf2dmcKEtJP8B/Z LQ== Received: from iadpaimrmta02.imrmtpd1.prodappiadaev1.oraclevcn.com (iadpaimrmta02.appoci.oracle.com [147.154.18.20]) by mx0b-00069f02.pphosted.com (PPS) with ESMTPS id 3qpp44kumq-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 22 May 2023 23:52:53 +0000 Received: from pps.filterd (iadpaimrmta02.imrmtpd1.prodappiadaev1.oraclevcn.com [127.0.0.1]) by iadpaimrmta02.imrmtpd1.prodappiadaev1.oraclevcn.com (8.17.1.19/8.17.1.19) with ESMTP id 34MLouQa013218; Mon, 22 May 2023 23:52:52 GMT Received: from pps.reinject (localhost [127.0.0.1]) by iadpaimrmta02.imrmtpd1.prodappiadaev1.oraclevcn.com (PPS) with ESMTPS id 3qqk7e43vn-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 22 May 2023 23:52:52 +0000 Received: from iadpaimrmta02.imrmtpd1.prodappiadaev1.oraclevcn.com (iadpaimrmta02.imrmtpd1.prodappiadaev1.oraclevcn.com [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 34MNqqgv018982; Mon, 22 May 2023 23:52:52 GMT Received: from ca-common-hq.us.oracle.com (ca-common-hq.us.oracle.com [10.211.9.209]) by iadpaimrmta02.imrmtpd1.prodappiadaev1.oraclevcn.com (PPS) with ESMTP id 3qqk7e43vc-1; Mon, 22 May 2023 23:52:52 +0000 From: Dai Ngo To: chuck.lever@oracle.com, jlayton@kernel.org Cc: linux-nfs@vger.kernel.org, linux-fsdevel@vger.kernel.org Subject: [PATCH v5 0/3] NFSD: add support for NFSv4 write delegation Date: Mon, 22 May 2023 16:52:37 -0700 Message-Id: <1684799560-31663-1-git-send-email-dai.ngo@oracle.com> X-Mailer: git-send-email 1.8.3.1 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.957,Hydra:6.0.573,FMLib:17.11.176.26 definitions=2023-05-22_17,2023-05-22_03,2023-05-22_02 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 malwarescore=0 suspectscore=0 mlxscore=0 spamscore=0 mlxlogscore=800 adultscore=0 phishscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2304280000 definitions=main-2305220201 X-Proofpoint-GUID: mG3qQPbzzKhwgvq5ftf9mpVDGfzqfCEM X-Proofpoint-ORIG-GUID: mG3qQPbzzKhwgvq5ftf9mpVDGfzqfCEM Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org NFSD: add support for NFSv4 write delegation The NFSv4 server currently supports read delegation using VFS lease which is implemented using file_lock. This patch series add write delegation support for NFSv4 server by: . remove the check for F_WRLCK in generic_add_lease to allow file_lock to be used for write delegation. . grant write delegation for OPEN with NFS4_SHARE_ACCESS_WRITE if there is no conflict with other OPENs. Write delegation conflict with another OPEN, REMOVE, RENAME and SETATTR are handled the same as read delegation using notify_change, try_break_deleg. Changes since v1: [PATCH 3/4] NFSD: add supports for CB_GETATTR callback - remove WARN_ON_ONCE from encode_bitmap4 - replace decode_bitmap4 with xdr_stream_decode_uint32_array - replace xdr_inline_decode and xdr_decode_hyper in decode_cb_getattr with xdr_stream_decode_u64. Also remove the un-needed likely(). - modify signature of encode_cb_getattr4args to take pointer to nfs4_cb_fattr - replace decode_attr_length with xdr_stream_decode_u32 - rename decode_cb_getattr to decode_cb_fattr4 - fold the initialization of cb_cinfo and cb_fsize into decode_cb_fattr4 - rename ncf_cb_cinfo to ncf_cb_change to avoid confusion of cindo usage in fs/nfsd/nfs4xdr.c - correct NFS4_dec_cb_getattr_sz and update size description [PATCH 4/4] NFSD: handle GETATTR conflict with write delegation - change nfs4_handle_wrdeleg_conflict returns __be32 to fix test robot - change ncf_cb_cinfo to ncf_cb_change to avoid confusion of cindo usage in fs/nfsd/nfs4xdr.c Changes since v2: [PATCH 2/4] NFSD: enable support for write delegation - rename 'deleg' to 'dl_type' in nfs4_set_delegation - remove 'wdeleg' in nfs4_open_delegation - drop [PATCH 3/4] NFSD: add supports for CB_GETATTR callback and [PATCH 4/4] NFSD: handle GETATTR conflict with write delegation for futher clarification of the benefits of these patches Changes since v3: - recall write delegation when there is GETATTR from 2nd client - add trace point to track when write delegation is granted Changes since v4: - squash 4/4 into 2/4 - apply 1/4 last instead of first - combine nfs4_wrdeleg_filelock and nfs4_handle_wrdeleg_conflict to nfsd4_deleg_getattr_conflict and move it to fs/nfsd/nfs4state.c - check for lock belongs to delegation before proceed and do it under the fl_lock - check and skip FL_LAYOUT file_locks