From patchwork Wed May 17 23:38:10 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dai Ngo X-Patchwork-Id: 13245997 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 8471BC7EE2A for ; Wed, 17 May 2023 23:39:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229457AbjEQXjX (ORCPT ); Wed, 17 May 2023 19:39:23 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59084 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229458AbjEQXjV (ORCPT ); Wed, 17 May 2023 19:39:21 -0400 Received: from mx0b-00069f02.pphosted.com (mx0b-00069f02.pphosted.com [205.220.177.32]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 08F2046B7; Wed, 17 May 2023 16:39:16 -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 34HIGocf018161; Wed, 17 May 2023 23:39:13 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=from : to : cc : subject : date : message-id : in-reply-to : references; s=corp-2023-03-30; bh=13yFsu/hc2QefBrXwXw9AQoe32PXPPNvjMgyb8bREfE=; b=0OZNozKmFSE+hL5S9Ki2xYKxnsWDxbQ65Bw7+VCu377pIGZC+5oeKsONAw5VzTVBRy9M +bQfWrDfngAfW+Qe2KrGsUPQp5Swi1CdJLd8IpWQ/W5H1zp5Brqanxu7MytXLWZS+F7K kXnecqdESdEzeWu8JktBYbSZ95VNmMjxB1+Nn9ZkgonFcRjXKJsq49i/iaQDUGjz+U4E RJLv7fxm47sKr8O71DsuQuBt/WolG7/K9jRa9n8/db7c2xClAGRbITFTo2fVZXA05+pm 3zIm0WUVu63P6WVd6zwy+kPqmuuYcK1qzCF0FhIrR3T1yN82vgEqM2WPmF0G1oHAppYr 7A== Received: from iadpaimrmta01.imrmtpd1.prodappiadaev1.oraclevcn.com (iadpaimrmta01.appoci.oracle.com [130.35.100.223]) by mx0b-00069f02.pphosted.com (PPS) with ESMTPS id 3qj0ye6q8a-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 17 May 2023 23:39:13 +0000 Received: from pps.filterd (iadpaimrmta01.imrmtpd1.prodappiadaev1.oraclevcn.com [127.0.0.1]) by iadpaimrmta01.imrmtpd1.prodappiadaev1.oraclevcn.com (8.17.1.19/8.17.1.19) with ESMTP id 34HN94Qs032131; Wed, 17 May 2023 23:39:13 GMT Received: from pps.reinject (localhost [127.0.0.1]) by iadpaimrmta01.imrmtpd1.prodappiadaev1.oraclevcn.com (PPS) with ESMTPS id 3qj10c3umj-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 17 May 2023 23:39:13 +0000 Received: from iadpaimrmta01.imrmtpd1.prodappiadaev1.oraclevcn.com (iadpaimrmta01.imrmtpd1.prodappiadaev1.oraclevcn.com [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 34HNdABl015880; Wed, 17 May 2023 23:39:12 GMT Received: from ca-common-hq.us.oracle.com (ca-common-hq.us.oracle.com [10.211.9.209]) by iadpaimrmta01.imrmtpd1.prodappiadaev1.oraclevcn.com (PPS) with ESMTP id 3qj10c3u5n-3; Wed, 17 May 2023 23:39:12 +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 v3 2/2] NFSD: enable support for write delegation Date: Wed, 17 May 2023 16:38:10 -0700 Message-Id: <1684366690-28029-3-git-send-email-dai.ngo@oracle.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1684366690-28029-1-git-send-email-dai.ngo@oracle.com> References: <1684366690-28029-1-git-send-email-dai.ngo@oracle.com> X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.957,Hydra:6.0.573,FMLib:17.11.170.22 definitions=2023-05-17_04,2023-05-17_02,2023-02-09_01 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 mlxlogscore=999 adultscore=0 malwarescore=0 mlxscore=0 spamscore=0 bulkscore=0 phishscore=0 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2304280000 definitions=main-2305170194 X-Proofpoint-ORIG-GUID: d7PWcoDHnUI4-tmHszg440bs8Yt6zc7G X-Proofpoint-GUID: d7PWcoDHnUI4-tmHszg440bs8Yt6zc7G Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org This patch grants 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. Signed-off-by: Dai Ngo --- fs/nfsd/nfs4state.c | 24 ++++++++++++++++-------- 1 file changed, 16 insertions(+), 8 deletions(-) diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 6e61fa3acaf1..09a9e16407f9 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -1144,7 +1144,7 @@ static void block_delegations(struct knfsd_fh *fh) static struct nfs4_delegation * alloc_init_deleg(struct nfs4_client *clp, struct nfs4_file *fp, - struct nfs4_clnt_odstate *odstate) + struct nfs4_clnt_odstate *odstate, u32 dl_type) { struct nfs4_delegation *dp; long n; @@ -1170,7 +1170,7 @@ alloc_init_deleg(struct nfs4_client *clp, struct nfs4_file *fp, INIT_LIST_HEAD(&dp->dl_recall_lru); dp->dl_clnt_odstate = odstate; get_clnt_odstate(odstate); - dp->dl_type = NFS4_OPEN_DELEGATE_READ; + dp->dl_type = dl_type; dp->dl_retries = 1; dp->dl_recalled = false; nfsd4_init_cb(&dp->dl_recall, dp->dl_stid.sc_client, @@ -5451,6 +5451,7 @@ nfs4_set_delegation(struct nfsd4_open *open, struct nfs4_ol_stateid *stp, struct nfs4_delegation *dp; struct nfsd_file *nf; struct file_lock *fl; + u32 deleg; /* * The fi_had_conflict and nfs_get_existing_delegation checks @@ -5460,7 +5461,13 @@ nfs4_set_delegation(struct nfsd4_open *open, struct nfs4_ol_stateid *stp, if (fp->fi_had_conflict) return ERR_PTR(-EAGAIN); - nf = find_readable_file(fp); + if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) { + nf = find_writeable_file(fp); + deleg = NFS4_OPEN_DELEGATE_WRITE; + } else { + nf = find_readable_file(fp); + deleg = NFS4_OPEN_DELEGATE_READ; + } if (!nf) { /* * We probably could attempt another open and get a read @@ -5491,11 +5498,11 @@ nfs4_set_delegation(struct nfsd4_open *open, struct nfs4_ol_stateid *stp, return ERR_PTR(status); status = -ENOMEM; - dp = alloc_init_deleg(clp, fp, odstate); + dp = alloc_init_deleg(clp, fp, odstate, deleg); if (!dp) goto out_delegees; - fl = nfs4_alloc_init_lease(dp, NFS4_OPEN_DELEGATE_READ); + fl = nfs4_alloc_init_lease(dp, deleg); if (!fl) goto out_clnt_odstate; @@ -5583,6 +5590,7 @@ nfs4_open_delegation(struct nfsd4_open *open, struct nfs4_ol_stateid *stp, struct svc_fh *parent = NULL; int cb_up; int status = 0; + u32 wdeleg = false; cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); open->op_recall = 0; @@ -5590,8 +5598,6 @@ nfs4_open_delegation(struct nfsd4_open *open, struct nfs4_ol_stateid *stp, case NFS4_OPEN_CLAIM_PREVIOUS: if (!cb_up) open->op_recall = 1; - if (open->op_delegate_type != NFS4_OPEN_DELEGATE_READ) - goto out_no_deleg; break; case NFS4_OPEN_CLAIM_NULL: parent = currentfh; @@ -5617,7 +5623,9 @@ nfs4_open_delegation(struct nfsd4_open *open, struct nfs4_ol_stateid *stp, memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid)); trace_nfsd_deleg_read(&dp->dl_stid.sc_stateid); - open->op_delegate_type = NFS4_OPEN_DELEGATE_READ; + wdeleg = open->op_share_access & NFS4_SHARE_ACCESS_WRITE; + open->op_delegate_type = wdeleg ? + NFS4_OPEN_DELEGATE_WRITE : NFS4_OPEN_DELEGATE_READ; nfs4_put_stid(&dp->dl_stid); return; out_no_deleg: