From patchwork Wed Apr 6 22:45:24 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dai Ngo X-Patchwork-Id: 12804156 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 DE42EC4332F for ; Wed, 6 Apr 2022 22:45:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237224AbiDFWru (ORCPT ); Wed, 6 Apr 2022 18:47:50 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60554 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237344AbiDFWrm (ORCPT ); Wed, 6 Apr 2022 18:47:42 -0400 Received: from mx0a-00069f02.pphosted.com (mx0a-00069f02.pphosted.com [205.220.165.32]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7C96817941E for ; Wed, 6 Apr 2022 15:45:42 -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 236LdvcO006381; Wed, 6 Apr 2022 22:45:41 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=ggIXVGT9l8eJfTtRVhpwQVfYgFowHViLiSH6Kn5NsjU=; b=rlNZ6b6OmetkzzMc6Uz4Y4HijDMr1GCCuaR+2lzqhkQkSREhKO5SrSxRV+Wl/RSmVSm4 XZbXtOm0Oym9LrDuXfSzj6N/XaJ+l2kpu9uOgIKLhfRxczCYwIVALvVtmmre7k4I+JS/ 0x3xjx46r7hmSNokRlp5fgoW3igK51wb7ciDIsuI9Av9Fc3a/w6Zb9OA6MfZybI9iTPK pGzpYlJS5yCWR/YswB/gZsx/isJDf7eVNbtRI7fA3QcdRBaCU+CO04FZBKeFY+n1bFTn 3iAjmHs/6e70Y3+DjvLprMRHT7Y+PbOIMoDuHm9p2FUMORB2l0t7stShifyYDHI4pGeZ 5Q== Received: from iadpaimrmta02.imrmtpd1.prodappiadaev1.oraclevcn.com (iadpaimrmta02.appoci.oracle.com [147.154.18.20]) by mx0b-00069f02.pphosted.com with ESMTP id 3f6d31jd7b-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 06 Apr 2022 22:45:41 +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 236MeYDG011627; Wed, 6 Apr 2022 22:45:40 GMT Received: from pps.reinject (localhost [127.0.0.1]) by iadpaimrmta02.imrmtpd1.prodappiadaev1.oraclevcn.com with ESMTP id 3f9803d5n2-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 06 Apr 2022 22:45:40 +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 236MjcbY021908; Wed, 6 Apr 2022 22:45:39 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-2; Wed, 06 Apr 2022 22:45:39 +0000 From: Dai Ngo To: chuck.lever@oracle.com, bfields@fieldses.org Cc: linux-nfs@vger.kernel.org Subject: [PATCH RFC v20 01/10] NFSD: Add courtesy client state, macro and spinlock to support courteous server Date: Wed, 6 Apr 2022 15:45:24 -0700 Message-Id: <1649285133-16765-2-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-GUID: tPOtoU9fv8I0hCWFL9nB2WE5czJimyOf X-Proofpoint-ORIG-GUID: tPOtoU9fv8I0hCWFL9nB2WE5czJimyOf Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org Update nfs4_client to add: . cl_cs_client_state: courtesy client state . cl_cs_lock: spinlock to synchronize access to cl_cs_client_state . cl_cs_list: list used by laundromat to process courtesy clients Modify alloc_client to initialize these fields. Signed-off-by: Dai Ngo --- fs/nfsd/nfs4state.c | 2 ++ fs/nfsd/nfsd.h | 1 + fs/nfsd/state.h | 33 +++++++++++++++++++++++++++++++++ 3 files changed, 36 insertions(+) diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 234e852fcdfa..a65d59510681 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -2009,12 +2009,14 @@ static struct nfs4_client *alloc_client(struct xdr_netobj name) INIT_LIST_HEAD(&clp->cl_delegations); INIT_LIST_HEAD(&clp->cl_lru); INIT_LIST_HEAD(&clp->cl_revoked); + INIT_LIST_HEAD(&clp->cl_cs_list); #ifdef CONFIG_NFSD_PNFS INIT_LIST_HEAD(&clp->cl_lo_states); #endif INIT_LIST_HEAD(&clp->async_copies); spin_lock_init(&clp->async_lock); spin_lock_init(&clp->cl_lock); + spin_lock_init(&clp->cl_cs_lock); rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); return clp; err_no_hashtbl: diff --git a/fs/nfsd/nfsd.h b/fs/nfsd/nfsd.h index 4fc1fd639527..23996c6ca75e 100644 --- a/fs/nfsd/nfsd.h +++ b/fs/nfsd/nfsd.h @@ -336,6 +336,7 @@ void nfsd_lockd_shutdown(void); #define COMPOUND_ERR_SLACK_SPACE 16 /* OP_SETATTR */ #define NFSD_LAUNDROMAT_MINTIMEOUT 1 /* seconds */ +#define NFSD_COURTESY_CLIENT_TIMEOUT (24 * 60 * 60) /* seconds */ /* * The following attributes are currently not supported by the NFSv4 server: diff --git a/fs/nfsd/state.h b/fs/nfsd/state.h index 95457cfd37fc..7f78da5d1408 100644 --- a/fs/nfsd/state.h +++ b/fs/nfsd/state.h @@ -283,6 +283,35 @@ struct nfsd4_sessionid { #define HEXDIR_LEN 33 /* hex version of 16 byte md5 of cl_name plus '\0' */ /* + * State Meaning Where set + * -------------------------------------------------------------------------- + * | CLIENT_ACTIVE | Confirmed, active | Default | + * |------------------- ----------------------------------------------------| + * | CLIENT_COURTESY | Courtesy state. | nfs4_get_client_reaplist | + * | | Lease/lock/share | | + * | | reservation conflict | | + * | | can cause Courtesy | | + * | | client to be expired | | + * |------------------------------------------------------------------------| + * | CLIENT_EXPIRED | Courtesy client to be| nfs4_laundromat | + * | | expired by Laundromat| nfsd4_lm_lock_expired | + * | | due to conflict | nfsd4_discard_courtesy_clnt | + * | | | nfsd4_expire_courtesy_clnt | + * |------------------------------------------------------------------------| + * | CLIENT_RECONNECT | Courtesy client | nfsd4_courtesy_clnt_expired | + * | | reconnected, | | + * | | becoming active | | + * -------------------------------------------------------------------------- + */ + +enum courtesy_client_state { + NFSD4_CLIENT_ACTIVE = 0, + NFSD4_CLIENT_COURTESY, + NFSD4_CLIENT_EXPIRED, + NFSD4_CLIENT_RECONNECTED, +}; + +/* * struct nfs4_client - one per client. Clientids live here. * * The initial object created by an NFS client using SETCLIENTID (for NFSv4.0) @@ -385,6 +414,10 @@ struct nfs4_client { struct list_head async_copies; /* list of async copies */ spinlock_t async_lock; /* lock for async copies */ atomic_t cl_cb_inflight; /* Outstanding callbacks */ + + enum courtesy_client_state cl_cs_client_state; + spinlock_t cl_cs_lock; + struct list_head cl_cs_list; }; /* struct nfs4_client_reset