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[209.132.180.67]) by mx.google.com with ESMTP id r9-v6si11749384plo.442.2018.05.02.08.48.11; Wed, 02 May 2018 08:48:25 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751822AbeEBPrM (ORCPT + 99 others); Wed, 2 May 2018 11:47:12 -0400 Received: from mail-wm0-f68.google.com ([74.125.82.68]:52751 "EHLO mail-wm0-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751941AbeEBPpm (ORCPT ); Wed, 2 May 2018 11:45:42 -0400 Received: by mail-wm0-f68.google.com with SMTP id w194so1605160wmf.2; Wed, 02 May 2018 08:45:42 -0700 (PDT) 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; bh=4HWO4KsdDhMpVuT6Ip08U41WBV/ZH0R1wkEpLENMUDk=; b=jpHcED4D5/uJgnt4jz9POFAxzQM05vITV0q0vIN7AjzYjWs0CMaeqWKwcI84/QoyFE pm4KLIyuqh61s3I22fSw76YjTVnMbVDL31LJIwwG3FE53kjFsen8AiAbnBEHxhrw+9qr 5yBQWvjbA7tnHKb+myWiDJbzRy64FMFNJsgdGuv5GfdlND3JJ/AAjuN2ijXYiCS8EEI1 0E2xVIO0MKm7JLTFg/FCIChUhvY7N+WhAtN+bOHiYaWY3Vk3Ibf9fEsNU8gPP/sfklL8 xnEuyre+/qCeyGb86fJ3wFrT3TUhMbc1px6CgJQDOk0rGY+Xgu3tTzb5lWCx5Zvn0uZ+ 4koA== X-Gm-Message-State: ALQs6tAETtjNtEWB1PNHhT0lAkjX6l2WyqgR2z6i20EuKlLtef9PfIKq JbxRce2eGZ87pR0gbYoc2no= X-Received: by 2002:a50:9f0d:: with SMTP id b13-v6mr26721057edf.237.1525275941324; Wed, 02 May 2018 08:45:41 -0700 (PDT) Received: from localhost.localdomain ([193.175.2.17]) by smtp.gmail.com with ESMTPSA id w26-v6sm6827884edq.77.2018.05.02.08.45.40 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 02 May 2018 08:45:40 -0700 (PDT) From: Christian Brauner To: viro@zeniv.linux.org.uk, torvalds@linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, hch@infradead.org Cc: tglx@linutronix.de, kstewart@linuxfoundation.org, gregkh@linuxfoundation.org, pombredanne@nexb.com, Christian Brauner Subject: [PATCH 5/6 resend] statfs: add ST_SLAVE Date: Wed, 2 May 2018 17:42:38 +0200 Message-Id: <20180502154239.14013-6-christian.brauner@ubuntu.com> X-Mailer: git-send-email 2.17.0 In-Reply-To: <20180502154239.14013-1-christian.brauner@ubuntu.com> References: <20180502154239.14013-1-christian.brauner@ubuntu.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Signed-off-by: Christian Brauner --- fs/statfs.c | 10 +++++++++- include/linux/statfs.h | 1 + 2 files changed, 10 insertions(+), 1 deletion(-) diff --git a/fs/statfs.c b/fs/statfs.c index 2fc6f9c3793c..35ad0402c9a3 100644 --- a/fs/statfs.c +++ b/fs/statfs.c @@ -10,6 +10,7 @@ #include #include #include "internal.h" +#include "pnode.h" static int flags_by_mnt(int mnt_flags) { @@ -50,8 +51,15 @@ static int flags_by_sb(int s_flags) static int calculate_f_flags(struct vfsmount *mnt) { - return ST_VALID | flags_by_mnt(mnt->mnt_flags) | + int flags = 0; + + flags = ST_VALID | flags_by_mnt(mnt->mnt_flags) | flags_by_sb(mnt->mnt_sb->s_flags); + + if (IS_MNT_SLAVE(real_mount(mnt))) + flags |= ST_SLAVE; + + return flags; } static int statfs_by_dentry(struct dentry *dentry, struct kstatfs *buf) diff --git a/include/linux/statfs.h b/include/linux/statfs.h index 5416b2936dd9..048127effaad 100644 --- a/include/linux/statfs.h +++ b/include/linux/statfs.h @@ -41,6 +41,7 @@ struct kstatfs { #define ST_NODIRATIME (1<<11) /* do not update directory access times */ #define ST_RELATIME (1<<12) /* update atime relative to mtime/ctime */ #define ST_UNBINDABLE (1<<17) /* change to unbindable */ +#define ST_SLAVE (1<<19) /* change to slave */ #define ST_SHARED (1<<20) /* change to shared */ #endif -- 2.17.0