From mboxrd@z Thu Jan 1 00:00:00 1970 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=-9.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED 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 6EDCAC433E7 for ; Tue, 13 Oct 2020 10:58:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 19A26208D5 for ; Tue, 13 Oct 2020 10:58:57 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="U6gD2Yil" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387804AbgJMK6z (ORCPT ); Tue, 13 Oct 2020 06:58:55 -0400 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:36103 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727097AbgJMK6z (ORCPT ); Tue, 13 Oct 2020 06:58:55 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1602586734; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc; bh=REmCgWYwJhHsPvepX/48qeuKG0BEbRA8uq96hiQdq0E=; b=U6gD2Yil7jc1d6etRXK+/JX4dmpDruMrbdTTHPViu9p5TBmAd6VKIINzlqIWV/uIXGtrHG wPteA3vUF2JysVYQPj4FtO4xHzGSTCQoT+CF+DyCiVxK2lWMJyZF7Dn3xhLNidu6NMwyWG +GcTR5P3BbjRn3ecy2El1t4tBJLj14k= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-75-VAajmguJM5-dPAgIZI7TQQ-1; Tue, 13 Oct 2020 06:58:50 -0400 X-MC-Unique: VAajmguJM5-dPAgIZI7TQQ-1 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 mimecast-mx01.redhat.com (Postfix) with ESMTPS id E55771084C82; Tue, 13 Oct 2020 10:58:48 +0000 (UTC) Received: from lxbceph1.gsslab.pek2.redhat.com (vm37-222.gsslab.pek2.redhat.com [10.72.37.222]) by smtp.corp.redhat.com (Postfix) with ESMTP id 3F6C360C0F; Tue, 13 Oct 2020 10:58:45 +0000 (UTC) From: xiubli@redhat.com To: jlayton@kernel.org Cc: idryomov@gmail.com, zyan@redhat.com, pdonnell@redhat.com, ceph-devel@vger.kernel.org, Xiubo Li Subject: [PATCH] ceph: add 'noshare' mount option support Date: Tue, 13 Oct 2020 18:31:12 +0800 Message-Id: <20201013103112.12132-1-xiubli@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 Precedence: bulk List-ID: X-Mailing-List: ceph-devel@vger.kernel.org From: Xiubo Li This will disable different mount points to share superblocks. URL: https://tracker.ceph.com/issues/46883 Signed-off-by: Xiubo Li --- fs/ceph/super.c | 12 ++++++++++++ fs/ceph/super.h | 1 + 2 files changed, 13 insertions(+) diff --git a/fs/ceph/super.c b/fs/ceph/super.c index 2f530a111b3a..6f283e4d62ee 100644 --- a/fs/ceph/super.c +++ b/fs/ceph/super.c @@ -159,6 +159,7 @@ enum { Opt_quotadf, Opt_copyfrom, Opt_wsync, + Opt_sharesb, }; enum ceph_recover_session_mode { @@ -199,6 +200,7 @@ static const struct fs_parameter_spec ceph_mount_parameters[] = { fsparam_string ("source", Opt_source), fsparam_u32 ("wsize", Opt_wsize), fsparam_flag_no ("wsync", Opt_wsync), + fsparam_flag_no ("sharesb", Opt_sharesb), {} }; @@ -455,6 +457,12 @@ static int ceph_parse_mount_param(struct fs_context *fc, else fsopt->flags |= CEPH_MOUNT_OPT_ASYNC_DIROPS; break; + case Opt_sharesb: + if (!result.negated) + fsopt->flags &= ~CEPH_MOUNT_OPT_NO_SHARE_SB; + else + fsopt->flags |= CEPH_MOUNT_OPT_NO_SHARE_SB; + break; default: BUG(); } @@ -1007,6 +1015,10 @@ static int ceph_compare_super(struct super_block *sb, struct fs_context *fc) dout("ceph_compare_super %p\n", sb); + if (fsopt->flags & CEPH_MOUNT_OPT_NO_SHARE_SB || + other->mount_options->flags & CEPH_MOUNT_OPT_NO_SHARE_SB) + return 0; + if (compare_mount_options(fsopt, opt, other)) { dout("monitor(s)/mount options don't match\n"); return 0; diff --git a/fs/ceph/super.h b/fs/ceph/super.h index f097237a5ad3..e877c21196e5 100644 --- a/fs/ceph/super.h +++ b/fs/ceph/super.h @@ -44,6 +44,7 @@ #define CEPH_MOUNT_OPT_NOQUOTADF (1<<13) /* no root dir quota in statfs */ #define CEPH_MOUNT_OPT_NOCOPYFROM (1<<14) /* don't use RADOS 'copy-from' op */ #define CEPH_MOUNT_OPT_ASYNC_DIROPS (1<<15) /* allow async directory ops */ +#define CEPH_MOUNT_OPT_NO_SHARE_SB (1<<16) /* disable sharing the same superblock */ #define CEPH_MOUNT_OPT_DEFAULT \ (CEPH_MOUNT_OPT_DCACHE | \ -- 2.18.4