From patchwork Mon Nov 20 05:30:08 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ronnie Sahlberg X-Patchwork-Id: 10065967 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 99B39602B7 for ; Mon, 20 Nov 2017 05:30:11 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 88C9928C26 for ; Mon, 20 Nov 2017 05:30:11 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 7ABE228DD6; Mon, 20 Nov 2017 05:30:11 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 4D81028C26 for ; Mon, 20 Nov 2017 05:30:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750790AbdKTFaJ (ORCPT ); Mon, 20 Nov 2017 00:30:09 -0500 Received: from mx1.redhat.com ([209.132.183.28]:55642 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750764AbdKTFaI (ORCPT ); Mon, 20 Nov 2017 00:30:08 -0500 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 814886A7DC; Mon, 20 Nov 2017 05:30:08 +0000 (UTC) Received: from colo-mx.corp.redhat.com (colo-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.20]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 6C85660BE3; Mon, 20 Nov 2017 05:30:08 +0000 (UTC) Received: from zmail25.collab.prod.int.phx2.redhat.com (zmail25.collab.prod.int.phx2.redhat.com [10.5.83.31]) by colo-mx.corp.redhat.com (Postfix) with ESMTP id 5B22D1809547; Mon, 20 Nov 2017 05:30:08 +0000 (UTC) Date: Mon, 20 Nov 2017 00:30:08 -0500 (EST) From: Leif Sahlberg To: Long Li Cc: Steve French , linux-cifs@vger.kernel.org, samba-technical@lists.samba.org, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, Christoph Hellwig , Tom Talpey , Matthew Wilcox , Stephen Hemminger , Long Li Message-ID: <1784087974.28433669.1511155808289.JavaMail.zimbra@redhat.com> In-Reply-To: <20171107085514.12693-4-longli@exchange.microsoft.com> References: <20171107085514.12693-1-longli@exchange.microsoft.com> <20171107085514.12693-4-longli@exchange.microsoft.com> Subject: Re: [Patch v7 03/22] CIFS: SMBD: Add rdma mount option MIME-Version: 1.0 X-Originating-IP: [10.64.54.107, 10.4.195.24] Thread-Topic: CIFS: SMBD: Add rdma mount option Thread-Index: qJd3eNoy1j0/pUrj7Quo4kfJpJxP6A== X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.27]); Mon, 20 Nov 2017 05:30:08 +0000 (UTC) Sender: linux-cifs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-cifs@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Acked-by: Ronnie Sahlberg ----- Original Message ----- From: "Long Li" To: "Steve French" , linux-cifs@vger.kernel.org, samba-technical@lists.samba.org, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, "Christoph Hellwig" , "Tom Talpey" , "Matthew Wilcox" , "Stephen Hemminger" Cc: "Long Li" Sent: Tuesday, 7 November, 2017 7:54:55 PM Subject: [Patch v7 03/22] CIFS: SMBD: Add rdma mount option From: Long Li Add "rdma" to CIFS mount options to connect to SMB Direct. Add checks to validate this is used on SMB 3.X dialects. To connect to SMBDirect, use "mount.cifs -o rdma,vers=3.x". At the time of this patch, 3.x can be 3.0, 3.02 or 3.1.1. Signed-off-by: Long Li --- fs/cifs/cifs_debug.c | 2 ++ fs/cifs/cifsfs.c | 2 ++ fs/cifs/cifsglob.h | 5 +++++ fs/cifs/connect.c | 15 ++++++++++++++- 4 files changed, 23 insertions(+), 1 deletion(-) diff --git a/fs/cifs/cifs_debug.c b/fs/cifs/cifs_debug.c index 9727e1d..ba0870d 100644 --- a/fs/cifs/cifs_debug.c +++ b/fs/cifs/cifs_debug.c @@ -171,6 +171,8 @@ static int cifs_debug_data_proc_show(struct seq_file *m, void *v) ses->ses_count, ses->serverOS, ses->serverNOS, ses->capabilities, ses->status); } + if (server->rdma) + seq_printf(m, "RDMA\n\t"); seq_printf(m, "TCP status: %d\n\tLocal Users To " "Server: %d SecMode: 0x%x Req On Wire: %d", server->tcpStatus, server->srv_count, diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c index 180b335..e15fbf1 100644 --- a/fs/cifs/cifsfs.c +++ b/fs/cifs/cifsfs.c @@ -327,6 +327,8 @@ cifs_show_address(struct seq_file *s, struct TCP_Server_Info *server) default: seq_puts(s, "(unknown)"); } + if (server->rdma) + seq_puts(s, ",rdma"); } static void diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h index 808486c..5585516 100644 --- a/fs/cifs/cifsglob.h +++ b/fs/cifs/cifsglob.h @@ -530,6 +530,7 @@ struct smb_vol { bool nopersistent:1; bool resilient:1; /* noresilient not required since not fored for CA */ bool domainauto:1; + bool rdma:1; unsigned int rsize; unsigned int wsize; bool sockopt_tcp_nodelay:1; @@ -646,6 +647,10 @@ struct TCP_Server_Info { bool sec_kerberos; /* supports plain Kerberos */ bool sec_mskerberos; /* supports legacy MS Kerberos */ bool large_buf; /* is current buffer large? */ + /* use SMBD connection instead of socket */ + bool rdma; + /* point to the SMBD connection if RDMA is used instead of socket */ + struct smbd_connection *smbd_conn; struct delayed_work echo; /* echo ping workqueue job */ char *smallbuf; /* pointer to current "small" buffer */ char *bigbuf; /* pointer to current "big" buffer */ diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c index 59647eb..b5a575f 100644 --- a/fs/cifs/connect.c +++ b/fs/cifs/connect.c @@ -92,7 +92,7 @@ enum { Opt_multiuser, Opt_sloppy, Opt_nosharesock, Opt_persistent, Opt_nopersistent, Opt_resilient, Opt_noresilient, - Opt_domainauto, + Opt_domainauto, Opt_rdma, /* Mount options which take numeric value */ Opt_backupuid, Opt_backupgid, Opt_uid, @@ -183,6 +183,7 @@ static const match_table_t cifs_mount_option_tokens = { { Opt_resilient, "resilienthandles"}, { Opt_noresilient, "noresilienthandles"}, { Opt_domainauto, "domainauto"}, + { Opt_rdma, "rdma"}, { Opt_backupuid, "backupuid=%s" }, { Opt_backupgid, "backupgid=%s" }, @@ -1538,6 +1539,9 @@ cifs_parse_mount_options(const char *mountdata, const char *devname, case Opt_domainauto: vol->domainauto = true; break; + case Opt_rdma: + vol->rdma = true; + break; /* Numeric Values */ case Opt_backupuid: @@ -1928,6 +1932,11 @@ cifs_parse_mount_options(const char *mountdata, const char *devname, goto cifs_parse_mount_err; } + if (vol->rdma && vol->vals->protocol_id < SMB30_PROT_ID) { + cifs_dbg(VFS, "SMB Direct requires Version >=3.0\n"); + goto cifs_parse_mount_err; + } + #ifndef CONFIG_KEYS /* Muliuser mounts require CONFIG_KEYS support */ if (vol->multiuser) { @@ -2131,6 +2140,9 @@ static int match_server(struct TCP_Server_Info *server, struct smb_vol *vol) if (server->echo_interval != vol->echo_interval * HZ) return 0; + if (server->rdma != vol->rdma) + return 0; + return 1; } @@ -2229,6 +2241,7 @@ cifs_get_tcp_session(struct smb_vol *volume_info) tcp_ses->noblocksnd = volume_info->noblocksnd; tcp_ses->noautotune = volume_info->noautotune; tcp_ses->tcp_nodelay = volume_info->sockopt_tcp_nodelay; + tcp_ses->rdma = volume_info->rdma; tcp_ses->in_flight = 0; tcp_ses->credits = 1; init_waitqueue_head(&tcp_ses->response_q);