From patchwork Sun Aug 20 19:04:25 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Long Li X-Patchwork-Id: 9911305 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 A1CD3603F3 for ; Sun, 20 Aug 2017 19:06:21 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 91DF328705 for ; Sun, 20 Aug 2017 19:06:21 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 867CE28739; Sun, 20 Aug 2017 19:06:21 +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 1473228710 for ; Sun, 20 Aug 2017 19:06:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753465AbdHTTGU (ORCPT ); Sun, 20 Aug 2017 15:06:20 -0400 Received: from a2nlsmtp01-04.prod.iad2.secureserver.net ([198.71.225.38]:41826 "EHLO a2nlsmtp01-04.prod.iad2.secureserver.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753368AbdHTTGS (ORCPT ); Sun, 20 Aug 2017 15:06:18 -0400 Received: from linuxonhyperv.com ([107.180.71.197]) by : HOSTING RELAY : with SMTP id jVXAd9wxLggvVjVXAdRQVA; Sun, 20 Aug 2017 12:05:17 -0700 x-originating-ip: 107.180.71.197 Received: from longli by linuxonhyperv.com with local (Exim 4.89) (envelope-from ) id 1djVXA-0000nn-0g; Sun, 20 Aug 2017 12:05:16 -0700 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 Cc: Long Li Subject: [Patch v2 01/19] CIFS: Add RDMA mount option Date: Sun, 20 Aug 2017 12:04:25 -0700 Message-Id: <1503255883-3041-2-git-send-email-longli@exchange.microsoft.com> X-Mailer: git-send-email 1.7.1 In-Reply-To: <1503255883-3041-1-git-send-email-longli@exchange.microsoft.com> References: <1503255883-3041-1-git-send-email-longli@exchange.microsoft.com> X-CMAE-Envelope: MS4wfBRz21NJHtgQMP6qs5ygvDUFXQAvAhfx8rEAWYC536aB4pnt+SdIMRhzIQzRH7o8fsiLA8egTq3b14gUGejDGpcvmaadp49uz5U9SVMfaWSeo6iAJ+oy ycTLvscTSyxBVxBMdMFdsff9dVuqXBaBkhZSecragC4WaoxykkpcjloFdBT/ehQLRuCuBj3vTANDwdPUGZt5zdVuRlIqBaSJTt/JXz3pjhmn1j+z+wCLzOsX QaUdbcLyAr0qz1j+BL6Rrveq1ux8cK3q6+wF+V7cUaYsRkNdg7dkpMKAUFtbwPQ4IWvlmzvhFIdPWNCB+kqp8xf9Z0tjcZ7aHM5XytpxTKb2P2Rcd4ftFmge a2Hj8ZACdGX+piBBg5ObPNCGtDogwrV6fQiX3USCJj31MnNauZxN2D0tIY6wZS56J+muy9pM1FffpgzFDfA4DzQOb463TKBrag64Ya96/WWXEjlLUdGxjLj2 AOq5xQlDrpjXee9d 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 From: Long Li Add "rdma" to CIFS mount option, which tells CIFS this is for connecting to a SMB server over SMBDirect. Add checks to validate this feature is only used on SMB 3.X dialects. To connect to SMBDirect, use "mount.cifs -o rdma,vers=3.x". Signed-off-by: Long Li --- fs/cifs/cifs_debug.c | 2 ++ fs/cifs/cifsfs.c | 2 ++ fs/cifs/cifsglob.h | 3 +++ fs/cifs/connect.c | 25 ++++++++++++++++++++++++- 4 files changed, 31 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 fe0c8dc..a628800 100644 --- a/fs/cifs/cifsfs.c +++ b/fs/cifs/cifsfs.c @@ -330,6 +330,8 @@ 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 8289f95..703c2fb 100644 --- a/fs/cifs/cifsglob.h +++ b/fs/cifs/cifsglob.h @@ -531,6 +531,7 @@ 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; @@ -649,6 +650,8 @@ 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; 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 2eeaac6..d5d0ecd 100644 --- a/fs/cifs/connect.c +++ b/fs/cifs/connect.c @@ -94,7 +94,7 @@ 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, @@ -185,6 +185,7 @@ 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" }, @@ -1541,6 +1542,9 @@ 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: @@ -1931,6 +1935,21 @@ cifs_parse_mount_options(const char *mountdata, const char *devname, goto cifs_parse_mount_err; } + if (vol->rdma) { + switch (vol->vals->protocol_id) { + case SMB30_PROT_ID: + case SMB302_PROT_ID: + case SMB311_PROT_ID: + break; + default: + cifs_dbg( + VFS, + "SMBDirect requires Version " + "3.0, 3.02 or 3.1.1\n"); + goto cifs_parse_mount_err; + } + } + #ifndef CONFIG_KEYS /* Muliuser mounts require CONFIG_KEYS support */ if (vol->multiuser) { @@ -2134,6 +2153,9 @@ 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; } @@ -2234,6 +2256,7 @@ 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);