From patchwork Tue Aug 24 17:51:06 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Olga Kornievskaia X-Patchwork-Id: 12455689 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-15.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B8BDFC4320A for ; Tue, 24 Aug 2021 18:02:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A5B28610D0 for ; Tue, 24 Aug 2021 18:02:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237105AbhHXSCu (ORCPT ); Tue, 24 Aug 2021 14:02:50 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42634 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239014AbhHXSCo (ORCPT ); Tue, 24 Aug 2021 14:02:44 -0400 Received: from mail-qt1-x82f.google.com (mail-qt1-x82f.google.com [IPv6:2607:f8b0:4864:20::82f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D6105C05340D for ; Tue, 24 Aug 2021 10:51:21 -0700 (PDT) Received: by mail-qt1-x82f.google.com with SMTP id g11so17521822qtk.5 for ; Tue, 24 Aug 2021 10:51:21 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=zo4TDIEYdHuube7ARu42vguc1kT5xIUZHuSRtmn9BqY=; b=FJxpTi8geLoqKsKLIcexjf6waudZ8cyg4btxviA4hy3Sv2Wcfpg9Iy3r4D5KmK2BMv 2dRH0FHAY/vjSIDie8uNaDqeTq71Vmw4BMUYtMRFhHksBBxDNDJaAAK7GeiYQJQTbUb0 mYideWXp7XPR/DnhWhJM0OpThru1X0zM8xF1rnJ9C/OjrnrW4C1Xq8mQStmXxc58MGP5 oTKhp38JmFJT4bdwTiVJ2FXhIujIlwUExmK/pUMmKatRW681PnIn2xLrvvpbAPW756+D BaYxZPmR0QD9+pVVizX2invHkJ7vi34B7nXp46UPmIKm1q6OJ4aBTP8729R+F/CaBUTY HQ1w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=zo4TDIEYdHuube7ARu42vguc1kT5xIUZHuSRtmn9BqY=; b=MYP0wX/zX1SzkMt/lppzr+yUKCfkaWGgPvNVNPKSUPf2w9HDKAURyiTHRYJ5/LdZ3s A2v3FAcHmZTq9a4NrnftzyCkBgC0eIIsuZgghKp4AeLfwAbeNEn0TxReb9F3i2Aj5XfI e+CAxwtphMcdL1S1XWIBa2Mt0Z4LWvZqaZyr0t8DoenP2D2K2rxk0HdWMGVbeVAayIl5 3sjfcA7qLFyqu+ks65DQ0NVY95DGEXPR4VnDj/2ebGkRPAw3KeBvqg2pHUs90LOHpM3A 2nQCjvNxfd7784b9GsDQyqOoy2nBfg0Yl6e0qquRIqOFRSmFo0RXRmAVASiZWDQmHDfC 7SAw== X-Gm-Message-State: AOAM531N0jDtPBOQQVCX56R4Br52TP6sKeSNtuYw4sJxxmBecU7HOG4/ v2Nsz2Qof5HkhJ5spmQnYfc= X-Google-Smtp-Source: ABdhPJyctZE/adiL8YeDHaJRJGaUSaHtfExuN76InTUTu3kN7ajKpVkQuIZxPXV9YnzPYhvNkCMRhQ== X-Received: by 2002:ac8:73d8:: with SMTP id v24mr1496538qtp.203.1629827480960; Tue, 24 Aug 2021 10:51:20 -0700 (PDT) Received: from kolga-mac-1.vpn.netapp.com ([2600:1700:6a10:2e90:549b:da99:adb5:676c]) by smtp.gmail.com with ESMTPSA id n18sm11519658qkn.63.2021.08.24.10.51.19 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Tue, 24 Aug 2021 10:51:20 -0700 (PDT) From: Olga Kornievskaia To: trond.myklebust@hammerspace.com, anna.schumaker@netapp.com, steved@redhat.com Cc: linux-nfs@vger.kernel.org Subject: [PATCH v4 3/5] NFSv4 introduce max_connect mount options Date: Tue, 24 Aug 2021 13:51:06 -0400 Message-Id: <20210824175108.19746-5-olga.kornievskaia@gmail.com> X-Mailer: git-send-email 2.30.1 (Apple Git-130) In-Reply-To: <20210824175108.19746-1-olga.kornievskaia@gmail.com> References: <20210824175108.19746-1-olga.kornievskaia@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org From: Olga Kornievskaia This option will control up to how many xprts can the client establish to the server with a distinct address (that means nconnect connections are not counted towards this new limit). This patch is setting up nfs structures to keeep track of the max_connect limit (does not enforce it). The default value is kept at 1 so that no current mounts that don't want any additional connections would be effected. The maximum value is set at 16. Mounts to DS are not limited to default value of 1 but instead set to the maximum default value of 16 (NFS_MAX_TRANSPORTS). Signed-off-by: Olga Kornievskaia --- fs/nfs/client.c | 1 + fs/nfs/fs_context.c | 7 +++++++ fs/nfs/internal.h | 2 ++ fs/nfs/nfs4client.c | 12 ++++++++++-- fs/nfs/super.c | 2 ++ include/linux/nfs_fs.h | 5 +++++ include/linux/nfs_fs_sb.h | 1 + 7 files changed, 28 insertions(+), 2 deletions(-) diff --git a/fs/nfs/client.c b/fs/nfs/client.c index 330f65727c45..486dec59972b 100644 --- a/fs/nfs/client.c +++ b/fs/nfs/client.c @@ -179,6 +179,7 @@ struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *cl_init) clp->cl_proto = cl_init->proto; clp->cl_nconnect = cl_init->nconnect; + clp->cl_max_connect = cl_init->max_connect ? cl_init->max_connect : 1; clp->cl_net = get_net(cl_init->net); clp->cl_principal = "*"; diff --git a/fs/nfs/fs_context.c b/fs/nfs/fs_context.c index d95c9a39bc70..0d444a90f513 100644 --- a/fs/nfs/fs_context.c +++ b/fs/nfs/fs_context.c @@ -60,6 +60,7 @@ enum nfs_param { Opt_mountvers, Opt_namelen, Opt_nconnect, + Opt_max_connect, Opt_port, Opt_posix, Opt_proto, @@ -158,6 +159,7 @@ static const struct fs_parameter_spec nfs_fs_parameters[] = { fsparam_u32 ("mountvers", Opt_mountvers), fsparam_u32 ("namlen", Opt_namelen), fsparam_u32 ("nconnect", Opt_nconnect), + fsparam_u32 ("max_connect", Opt_max_connect), fsparam_string("nfsvers", Opt_vers), fsparam_u32 ("port", Opt_port), fsparam_flag_no("posix", Opt_posix), @@ -770,6 +772,11 @@ static int nfs_fs_context_parse_param(struct fs_context *fc, goto out_of_bounds; ctx->nfs_server.nconnect = result.uint_32; break; + case Opt_max_connect: + if (result.uint_32 < 1 || result.uint_32 > NFS_MAX_TRANSPORTS) + goto out_of_bounds; + ctx->nfs_server.max_connect = result.uint_32; + break; case Opt_lookupcache: switch (result.uint_32) { case Opt_lookupcache_all: diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h index a36af04188c2..66fc936834f2 100644 --- a/fs/nfs/internal.h +++ b/fs/nfs/internal.h @@ -67,6 +67,7 @@ struct nfs_client_initdata { int proto; u32 minorversion; unsigned int nconnect; + unsigned int max_connect; struct net *net; const struct rpc_timeout *timeparms; const struct cred *cred; @@ -121,6 +122,7 @@ struct nfs_fs_context { int port; unsigned short protocol; unsigned short nconnect; + unsigned short max_connect; unsigned short export_path_len; } nfs_server; diff --git a/fs/nfs/nfs4client.c b/fs/nfs/nfs4client.c index 28431acd1230..270caa1805a2 100644 --- a/fs/nfs/nfs4client.c +++ b/fs/nfs/nfs4client.c @@ -865,6 +865,7 @@ static int nfs4_set_client(struct nfs_server *server, const char *ip_addr, int proto, const struct rpc_timeout *timeparms, u32 minorversion, unsigned int nconnect, + unsigned int max_connect, struct net *net) { struct nfs_client_initdata cl_init = { @@ -883,6 +884,8 @@ static int nfs4_set_client(struct nfs_server *server, if (minorversion == 0) __set_bit(NFS_CS_REUSEPORT, &cl_init.init_flags); + else + cl_init.max_connect = max_connect; if (proto == XPRT_TRANSPORT_TCP) cl_init.nconnect = nconnect; @@ -952,8 +955,10 @@ struct nfs_client *nfs4_set_ds_client(struct nfs_server *mds_srv, return ERR_PTR(-EINVAL); cl_init.hostname = buf; - if (mds_clp->cl_nconnect > 1 && ds_proto == XPRT_TRANSPORT_TCP) + if (mds_clp->cl_nconnect > 1 && ds_proto == XPRT_TRANSPORT_TCP) { cl_init.nconnect = mds_clp->cl_nconnect; + cl_init.max_connect = NFS_MAX_TRANSPORTS; + } if (mds_srv->flags & NFS_MOUNT_NORESVPORT) __set_bit(NFS_CS_NORESVPORT, &cl_init.init_flags); @@ -1122,6 +1127,7 @@ static int nfs4_init_server(struct nfs_server *server, struct fs_context *fc) &timeparms, ctx->minorversion, ctx->nfs_server.nconnect, + ctx->nfs_server.max_connect, fc->net_ns); if (error < 0) return error; @@ -1211,6 +1217,7 @@ struct nfs_server *nfs4_create_referral_server(struct fs_context *fc) parent_server->client->cl_timeout, parent_client->cl_mvops->minor_version, parent_client->cl_nconnect, + parent_client->cl_max_connect, parent_client->cl_net); if (!error) goto init_server; @@ -1226,6 +1233,7 @@ struct nfs_server *nfs4_create_referral_server(struct fs_context *fc) parent_server->client->cl_timeout, parent_client->cl_mvops->minor_version, parent_client->cl_nconnect, + parent_client->cl_max_connect, parent_client->cl_net); if (error < 0) goto error; @@ -1323,7 +1331,7 @@ int nfs4_update_server(struct nfs_server *server, const char *hostname, error = nfs4_set_client(server, hostname, sap, salen, buf, clp->cl_proto, clnt->cl_timeout, clp->cl_minorversion, - clp->cl_nconnect, net); + clp->cl_nconnect, clp->cl_max_connect, net); clear_bit(NFS_MIG_TSM_POSSIBLE, &server->mig_status); if (error != 0) { nfs_server_insert_lists(server); diff --git a/fs/nfs/super.c b/fs/nfs/super.c index fe58525cfed4..e65c83494c05 100644 --- a/fs/nfs/super.c +++ b/fs/nfs/super.c @@ -480,6 +480,8 @@ static void nfs_show_mount_options(struct seq_file *m, struct nfs_server *nfss, if (clp->cl_nconnect > 0) seq_printf(m, ",nconnect=%u", clp->cl_nconnect); if (version == 4) { + if (clp->cl_max_connect > 1) + seq_printf(m, ",max_connect=%u", clp->cl_max_connect); if (nfss->port != NFS_PORT) seq_printf(m, ",port=%u", nfss->port); } else diff --git a/include/linux/nfs_fs.h b/include/linux/nfs_fs.h index ce6474594872..b9a8b925db43 100644 --- a/include/linux/nfs_fs.h +++ b/include/linux/nfs_fs.h @@ -40,6 +40,11 @@ #include +/* + * These are the default for number of transports to different server IPs + */ +#define NFS_MAX_TRANSPORTS 16 + /* * These are the default flags for swap requests */ diff --git a/include/linux/nfs_fs_sb.h b/include/linux/nfs_fs_sb.h index d71a0e90faeb..2a9acbfe00f0 100644 --- a/include/linux/nfs_fs_sb.h +++ b/include/linux/nfs_fs_sb.h @@ -62,6 +62,7 @@ struct nfs_client { u32 cl_minorversion;/* NFSv4 minorversion */ unsigned int cl_nconnect; /* Number of connections */ + unsigned int cl_max_connect; /* max number of xprts allowed */ const char * cl_principal; /* used for machine cred */ #if IS_ENABLED(CONFIG_NFS_V4)