From patchwork Thu Mar 31 16:02:05 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dai Ngo X-Patchwork-Id: 12797416 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 3ACF9C433EF for ; Thu, 31 Mar 2022 16:02:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239515AbiCaQEU (ORCPT ); Thu, 31 Mar 2022 12:04:20 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35314 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239510AbiCaQEK (ORCPT ); Thu, 31 Mar 2022 12:04:10 -0400 Received: from mx0a-00069f02.pphosted.com (mx0a-00069f02.pphosted.com [205.220.165.32]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3FDDA18546B; Thu, 31 Mar 2022 09:02:23 -0700 (PDT) Received: from pps.filterd (m0246627.ppops.net [127.0.0.1]) by mx0b-00069f02.pphosted.com (8.16.1.2/8.16.1.2) with SMTP id 22VFBwau030433; Thu, 31 Mar 2022 16:02:20 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-2021-07-09; bh=4V//yiVK06nWuLFbwBJVa6D6T48O4hr3ccOwZgg5FZw=; b=aapnEdVPpmUw0OncgZ3Fi5qZ43JQUW8K90HO+Hund0o4Kx1ZzYPZM80uMUrOy3YSkowX EjGqU9VCLbzYkg9hN0cnDTWiGsSClUpFfz+MQZroeHn8wrb5VAIxFqNk8KsaO4JLWcu/ 1fQ8p7N1MWW60VejeRFRkM721pPniA8pbu44z5cik8smtJtIW5iwIVjE+pe4i+uE/nmY u0nU2wtU1KMY793Nxl8sWAfdJslJuTR8N8A7SNhE/uOmqsQqeK7kFisEbRj4bHdHEk8a fpseRlnIjrH7vhnwLBXMAS998p1Py0kUhM8ZMLK8aOsCjbXDpaeymC5XtKhIshzr8VQG aA== Received: from phxpaimrmta02.imrmtpd1.prodappphxaev1.oraclevcn.com (phxpaimrmta02.appoci.oracle.com [147.154.114.232]) by mx0b-00069f02.pphosted.com with ESMTP id 3f1se0mtme-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 31 Mar 2022 16:02:19 +0000 Received: from pps.filterd (phxpaimrmta02.imrmtpd1.prodappphxaev1.oraclevcn.com [127.0.0.1]) by phxpaimrmta02.imrmtpd1.prodappphxaev1.oraclevcn.com (8.16.1.2/8.16.1.2) with SMTP id 22VFvMnG029521; Thu, 31 Mar 2022 16:02:18 GMT Received: from pps.reinject (localhost [127.0.0.1]) by phxpaimrmta02.imrmtpd1.prodappphxaev1.oraclevcn.com with ESMTP id 3f1s95hxkp-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 31 Mar 2022 16:02:18 +0000 Received: from phxpaimrmta02.imrmtpd1.prodappphxaev1.oraclevcn.com (phxpaimrmta02.imrmtpd1.prodappphxaev1.oraclevcn.com [127.0.0.1]) by pps.reinject (8.16.0.36/8.16.0.36) with SMTP id 22VG10K9003132; Thu, 31 Mar 2022 16:02:17 GMT Received: from ca-common-hq.us.oracle.com (ca-common-hq.us.oracle.com [10.211.9.209]) by phxpaimrmta02.imrmtpd1.prodappphxaev1.oraclevcn.com with ESMTP id 3f1s95hxf8-8; Thu, 31 Mar 2022 16:02:17 +0000 From: Dai Ngo To: chuck.lever@oracle.com, bfields@fieldses.org Cc: jlayton@redhat.com, viro@zeniv.linux.org.uk, linux-nfs@vger.kernel.org, linux-fsdevel@vger.kernel.org Subject: [PATCH RFC v19 07/11] NFSD: Update find_in_sessionid_hashtbl() to handle courtesy client Date: Thu, 31 Mar 2022 09:02:05 -0700 Message-Id: <1648742529-28551-8-git-send-email-dai.ngo@oracle.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1648742529-28551-1-git-send-email-dai.ngo@oracle.com> References: <1648742529-28551-1-git-send-email-dai.ngo@oracle.com> X-Proofpoint-ORIG-GUID: iX5625Bqh0sGnQXph57zef34SjHjAELK X-Proofpoint-GUID: iX5625Bqh0sGnQXph57zef34SjHjAELK Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org Update find_in_sessionid_hashtbl to: . skip client with CLIENT_EXPIRED state; discarded courtesy client. . if courtesy client was found then set CLIENT_RECONNECTED so caller can take appropriate action. Update nfsd4_sequence and nfsd4_bind_conn_to_session to create client record for courtesy client with CLIENT_RECONNECTED state. Update nfsd4_destroy_session to discard courtesy client with CLIENT_RECONNECTED state. Signed-off-by: Dai Ngo --- fs/nfsd/nfs4state.c | 41 +++++++++++++++++++++++++++++++++++++++-- 1 file changed, 39 insertions(+), 2 deletions(-) diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index eadce5d19473..a3004654d096 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -701,6 +701,22 @@ __nfs4_file_get_access(struct nfs4_file *fp, u32 access) atomic_inc(&fp->fi_access[O_RDONLY]); } +static void +nfsd4_reactivate_courtesy_client(struct nfs4_client *clp, __be32 status) +{ + spin_lock(&clp->cl_cs_lock); + if (clp->cl_cs_client_state == NFSD4_CLIENT_RECONNECTED) { + if (status == nfs_ok) { + clp->cl_cs_client_state = NFSD4_CLIENT_ACTIVE; + spin_unlock(&clp->cl_cs_lock); + nfsd4_client_record_create(clp); + return; + } + clp->cl_cs_client_state = NFSD4_CLIENT_EXPIRED; + } + spin_unlock(&clp->cl_cs_lock); +} + /* * Check if courtesy clients have conflicting access and resolve it if possible * @@ -1994,13 +2010,22 @@ find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net, { struct nfsd4_session *session; __be32 status = nfserr_badsession; + struct nfs4_client *clp; session = __find_in_sessionid_hashtbl(sessionid, net); if (!session) goto out; + clp = session->se_client; + if (nfsd4_courtesy_clnt_expired(clp)) { + session = NULL; + goto out; + } status = nfsd4_get_session_locked(session); - if (status) + if (status) { session = NULL; + if (clp->cl_cs_client_state == NFSD4_CLIENT_RECONNECTED) + nfsd4_discard_courtesy_clnt(clp); + } out: *ret = status; return session; @@ -3702,6 +3727,7 @@ __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, struct nfsd4_session *session; struct net *net = SVC_NET(rqstp); struct nfsd_net *nn = net_generic(net, nfsd_net_id); + struct nfs4_client *clp; if (!nfsd4_last_compound_op(rqstp)) return nfserr_not_only_op; @@ -3734,6 +3760,8 @@ __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, nfsd4_init_conn(rqstp, conn, session); status = nfs_ok; out: + clp = session->se_client; + nfsd4_reactivate_courtesy_client(clp, status); nfsd4_put_session(session); out_no_session: return status; @@ -3756,6 +3784,7 @@ nfsd4_destroy_session(struct svc_rqst *r, struct nfsd4_compound_state *cstate, int ref_held_by_me = 0; struct net *net = SVC_NET(r); struct nfsd_net *nn = net_generic(net, nfsd_net_id); + struct nfs4_client *clp; status = nfserr_not_only_op; if (nfsd4_compound_in_session(cstate, sessionid)) { @@ -3768,6 +3797,12 @@ nfsd4_destroy_session(struct svc_rqst *r, struct nfsd4_compound_state *cstate, ses = find_in_sessionid_hashtbl(sessionid, net, &status); if (!ses) goto out_client_lock; + clp = ses->se_client; + if (clp->cl_cs_client_state == NFSD4_CLIENT_RECONNECTED) { + status = nfserr_badsession; + nfsd4_discard_courtesy_clnt(clp); + goto out_put_session; + } status = nfserr_wrong_cred; if (!nfsd4_mach_creds_match(ses->se_client, r)) goto out_put_session; @@ -3872,7 +3907,7 @@ nfsd4_sequence(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_compoundres *resp = rqstp->rq_resp; struct xdr_stream *xdr = resp->xdr; struct nfsd4_session *session; - struct nfs4_client *clp; + struct nfs4_client *clp = NULL; struct nfsd4_slot *slot; struct nfsd4_conn *conn; __be32 status; @@ -3982,6 +4017,8 @@ nfsd4_sequence(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, if (conn) free_conn(conn); spin_unlock(&nn->client_lock); + if (clp) + nfsd4_reactivate_courtesy_client(clp, status); return status; out_put_session: nfsd4_put_session_locked(session);