From patchwork Wed Apr 6 22:45:30 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dai Ngo X-Patchwork-Id: 12804158 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 24209C433F5 for ; Wed, 6 Apr 2022 22:45:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237226AbiDFWrv (ORCPT ); Wed, 6 Apr 2022 18:47:51 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60646 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237369AbiDFWro (ORCPT ); Wed, 6 Apr 2022 18:47:44 -0400 Received: from mx0b-00069f02.pphosted.com (mx0b-00069f02.pphosted.com [205.220.177.32]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1326442A3D for ; Wed, 6 Apr 2022 15:45:46 -0700 (PDT) Received: from pps.filterd (m0246630.ppops.net [127.0.0.1]) by mx0b-00069f02.pphosted.com (8.16.1.2/8.16.1.2) with SMTP id 236KGjw7012451; Wed, 6 Apr 2022 22:45:45 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=Ie641ePHUhK+My5tElENcwJXDoLk4zAMcalKxgc5z9w=; b=aP3HE1fvG+ZKEE9WKyEQHbpBP9QsG2pGrRF82pkbauamYjOVPZZpMP8sJdYWzebE1H2z IEXhRZoDlAqS9SR6TfJWJDgfA75gOMeCkZERT3m9lACAJhjqOaYuWXG7XALRt2v9FjiB 3qH+pPeWqtfxZy5EWw/HRaQhIRIXd+WYAgkw4Qx2q2itdVS7guzQ3WCd3z1296ekwpOs UWngvVtPac7NuYHBBB3qpiFVLklnkCDYrv/fayicp7u9DZsHrGKXcpOgVasiUucJf5/Q cFl5hzH6+Bpgq7MCTWPTv5hyRgD4sSBPZdjyGMu/fV8idt0fDMVqX+Nocty8FsuENiYB PQ== Received: from iadpaimrmta02.imrmtpd1.prodappiadaev1.oraclevcn.com (iadpaimrmta02.appoci.oracle.com [147.154.18.20]) by mx0b-00069f02.pphosted.com with ESMTP id 3f6cwcj1k3-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 06 Apr 2022 22:45:45 +0000 Received: from pps.filterd (iadpaimrmta02.imrmtpd1.prodappiadaev1.oraclevcn.com [127.0.0.1]) by iadpaimrmta02.imrmtpd1.prodappiadaev1.oraclevcn.com (8.16.1.2/8.16.1.2) with SMTP id 236MeYDH011627; Wed, 6 Apr 2022 22:45:44 GMT Received: from pps.reinject (localhost [127.0.0.1]) by iadpaimrmta02.imrmtpd1.prodappiadaev1.oraclevcn.com with ESMTP id 3f9803d5q5-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 06 Apr 2022 22:45:44 +0000 Received: from iadpaimrmta02.imrmtpd1.prodappiadaev1.oraclevcn.com (iadpaimrmta02.imrmtpd1.prodappiadaev1.oraclevcn.com [127.0.0.1]) by pps.reinject (8.16.0.36/8.16.0.36) with SMTP id 236Mjcbk021908; Wed, 6 Apr 2022 22:45:44 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 with ESMTP id 3f9803d5mk-8; Wed, 06 Apr 2022 22:45:44 +0000 From: Dai Ngo To: chuck.lever@oracle.com, bfields@fieldses.org Cc: linux-nfs@vger.kernel.org Subject: [PATCH RFC v20 07/10] NFSD: Update find_client_in_id_table() to handle courtesy client Date: Wed, 6 Apr 2022 15:45:30 -0700 Message-Id: <1649285133-16765-8-git-send-email-dai.ngo@oracle.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1649285133-16765-1-git-send-email-dai.ngo@oracle.com> References: <1649285133-16765-1-git-send-email-dai.ngo@oracle.com> X-Proofpoint-ORIG-GUID: 8A5fGtM0NtgalLFU1Fm3_iitL9AXvErB X-Proofpoint-GUID: 8A5fGtM0NtgalLFU1Fm3_iitL9AXvErB Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org Update find_client_in_id_table to: . skip client with CLIENT_EXPIRED; discarded courtesy client . if courtesy client was found then set CLIENT_RECONNECTED state so caller can take appropriate action. Update find_confirmed_client to discard courtesy client. Update lookup_clientid to call find_client_in_id_table directly. Update set_client to create client record for courtesy client. Update find_cpntf_state to discard courtesy client. Signed-off-by: Dai Ngo --- fs/nfsd/nfs4state.c | 19 ++++++++++++++++--- 1 file changed, 16 insertions(+), 3 deletions(-) diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 0fd058826e85..241d6a509994 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -2967,6 +2967,8 @@ find_client_in_id_table(struct list_head *tbl, clientid_t *clid, bool sessions) if (same_clid(&clp->cl_clientid, clid)) { if ((bool)clp->cl_minorversion != sessions) return NULL; + if (nfsd4_courtesy_clnt_expired(clp)) + continue; renew_client_locked(clp); return clp; } @@ -2978,9 +2980,13 @@ static struct nfs4_client * find_confirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) { struct list_head *tbl = nn->conf_id_hashtbl; + struct nfs4_client *clp; lockdep_assert_held(&nn->client_lock); - return find_client_in_id_table(tbl, clid, sessions); + clp = find_client_in_id_table(tbl, clid, sessions); + if (clp && nfsd4_discard_reconnect_clnt(clp)) + clp = NULL; + return clp; } static struct nfs4_client * @@ -4884,9 +4890,10 @@ static struct nfs4_client *lookup_clientid(clientid_t *clid, bool sessions, struct nfsd_net *nn) { struct nfs4_client *found; + struct list_head *tbl = nn->conf_id_hashtbl; spin_lock(&nn->client_lock); - found = find_confirmed_client(clid, sessions, nn); + found = find_client_in_id_table(tbl, clid, sessions); if (found) atomic_inc(&found->cl_rpc_users); spin_unlock(&nn->client_lock); @@ -4911,6 +4918,7 @@ static __be32 set_client(clientid_t *clid, cstate->clp = lookup_clientid(clid, false, nn); if (!cstate->clp) return nfserr_expired; + nfsd4_reactivate_courtesy_client(cstate->clp, nfs_ok); return nfs_ok; } @@ -6147,7 +6155,12 @@ static __be32 find_cpntf_state(struct nfsd_net *nn, stateid_t *st, found = lookup_clientid(&cps->cp_p_clid, true, nn); if (!found) goto out; - + if (nfsd4_discard_reconnect_clnt(found)) { + if (atomic_dec_and_lock(&found->cl_rpc_users, + &nn->client_lock)) + spin_unlock(&nn->client_lock); + goto out; + } *stid = find_stateid_by_type(found, &cps->cp_p_stateid, NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID); if (*stid)