From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: ARC-Seal: i=1; a=rsa-sha256; t=1524043653; cv=none; d=google.com; s=arc-20160816; b=G/iGE1RsGG2tXDI/nk4rsMtjz848xpkbyO+/aIdXk9LAgU7bbx9jJkb4OMLxo5dyHK 70BWYxEtNDPvh6gFiI7b4aTFZEAXZRNoX29WqlB0synxauOaCSt2ORx9s4ToYgBALcFg 7U4ucGZozrdYmu6VA9nEZeoLRzA7qTcugw6+ZWKDDgsErABOosyEjTteXpJTnyzIMj4+ cHSKndwiiLZKGgcG5owNMLfMEMN4CGKYT+N82VRwvZApeMaF1Qkmp+dVrPUHxlaqCwIN O4YwiH/Y6QbCBydUyr4V5e5omsdl3iNeAjVGrMqZANDwt7463iPmyAXCrc+QkoUWiTdx Pzaw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=references:in-reply-to:message-id:date:subject:cc:to:from :arc-authentication-results; bh=OjSgXUJrj4Kl//T21+dGr0qKeq18DnNW8jojiyem2z4=; b=tCZopQnbTBuTva1U2Wy1Cdgv/+WFf/ZoxWOWJNKbmSg1UzXCYswJ3WQrzzmDD8s7hh q9hP0zt8zn+YLx909NfjBYH+z1VtZgyHu+334EqEY3+EwK1GJ3ZdOlHiHPmo0MmPnhBj NrVSaz9kr6vAf3TjHrPEKAKFizuMcRqiPSQqY0FX/IKcueOyOSTVHHhXQ3h3cOWOGBGq EkB0H0em8KKCc7a3AaoRDaZ5iGqIZliPuR/Gpx6OjRa8vxG440x0Gl2ooG1loayJF2fP 6b6v5m/JJ56G/uUnJGv8kWxQmt6N/Df18e0pzNUNLcjC1IC4On7T3GiL4gK5OckDimBA jrDQ== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of christianvanbrauner@gmail.com designates 209.85.220.65 as permitted sender) smtp.mailfrom=christianvanbrauner@gmail.com Authentication-Results: mx.google.com; spf=pass (google.com: domain of christianvanbrauner@gmail.com designates 209.85.220.65 as permitted sender) smtp.mailfrom=christianvanbrauner@gmail.com X-Google-Smtp-Source: AIpwx4+VVfY2vRaJ6ZrQwOXt9jpooQnLf6F+OrIYIFZOoCGLS5SidqCinCHRB5SfK96Y7CLs4nyA8w== From: Christian Brauner To: viro@zeniv.linux.org.uk, kstewart@linuxfoundation.org, tglx@linutronix.de, pombredanne@nexb.com, gregkh@linuxfoundation.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, akpm@linux-foundation.org Cc: Christian Brauner Subject: [PATCH 4/6 RESEND] statfs: add ST_SHARED Date: Wed, 18 Apr 2018 11:27:20 +0200 Message-Id: <20180418092722.20136-5-christian.brauner@ubuntu.com> X-Mailer: git-send-email 2.17.0 In-Reply-To: <20180418092722.20136-1-christian.brauner@ubuntu.com> References: <20180418092722.20136-1-christian.brauner@ubuntu.com> X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: =?utf-8?q?1598075597838671209?= X-GMAIL-MSGID: =?utf-8?q?1598075597838671209?= X-Mailing-List: linux-kernel@vger.kernel.org List-ID: This lets userspace query whether a mountpoint was made MS_SHARED. Signed-off-by: Christian Brauner Cc: Alexander Viro --- fs/statfs.c | 2 ++ include/linux/statfs.h | 1 + 2 files changed, 3 insertions(+) diff --git a/fs/statfs.c b/fs/statfs.c index 61b3063d3921..2fc6f9c3793c 100644 --- a/fs/statfs.c +++ b/fs/statfs.c @@ -31,6 +31,8 @@ static int flags_by_mnt(int mnt_flags) flags |= ST_RELATIME; if (mnt_flags & MNT_UNBINDABLE) flags |= ST_UNBINDABLE; + if (mnt_flags & MNT_SHARED) + flags |= ST_SHARED; return flags; } diff --git a/include/linux/statfs.h b/include/linux/statfs.h index e1b84d0388c1..5416b2936dd9 100644 --- a/include/linux/statfs.h +++ b/include/linux/statfs.h @@ -41,5 +41,6 @@ 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_SHARED (1<<20) /* change to shared */ #endif -- 2.17.0