From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: ARC-Seal: i=1; a=rsa-sha256; t=1524043654; cv=none; d=google.com; s=arc-20160816; b=sVDuQzJLrbixZaQ/hCX1LyEo6x4VAdmVm6+PGvOjtsdtQA3zhWKyerOc0oGDOQwnTC xFyVrhMsN4OFBn6AeGU565KfvGnpxZjzemWCM6OzPufnXVqFDLln/OHaAtzzlBYCXm+B 5Xr82n6aXjbcsmEwGyRgPIW5zdp4IXHTAAVSoncSDKipYOECjlrffXGOJKO7QEPhWt2P ZbWbZ/GkLx9sdWoxIvj8mxVURGiN3Imk/F4VzW+yAor/6u6XpyWNn18ZGeoqudWioHqT oYkvOg05rus3nWq9RDV9Bhks138EQMjUWr85kPcXaCSkSdZtjVwwxc5afto598F5Ll25 ZuCQ== 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=Y9ImTX5Z7ixP7InZU8GHw6ppf1T3NOu1OskDToCK7KQ=; b=Qkg4YCT0jD9TPjPT7B0V57aQNciyPr1Sem2kWk91t1NMNs1NaUDX9FBBaUPZhEv5k/ wsphUC4R3HF1pDWEj/QCTHdkHM5mdIPMndWo+a5AhuZKfITu3Avm0SK6/YX/M1Dg4WlJ NPCluFn2HviXHWyMmlfPmtOxSdIj2gyr5Zj5fqmWUJI4zZuEklLLTTteunaKd8Gln419 mi1I3L6pzI8tSMi0xmJmJu+VlWwkFrootHq37e20Bw3Gzxwf872pAYQJfvNtd/wDyRC6 fY2/cseOz2bTs8P2Ict+9HkyQUo0VOfOyyQUf/IrwYV3GPcVvJljXX6CffUicSGsdTLz XpOA== 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/w616KzIjsjGvTfVu5ODzaiTbBwDxVN+WzLNRr7FrA/4DJo2D46pKFdOO0r9UPcqUT6wieEw== 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 5/6 RESEND] statfs: add ST_PRIVATE Date: Wed, 18 Apr 2018 11:27:21 +0200 Message-Id: <20180418092722.20136-6-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?1598075598879968593?= X-GMAIL-MSGID: =?utf-8?q?1598075598879968593?= X-Mailing-List: linux-kernel@vger.kernel.org List-ID: This lets userspace query whether a mountpoint was made MS_PRIVATE. 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 2fc6f9c3793c..26cda2586d7e 100644 --- a/fs/statfs.c +++ b/fs/statfs.c @@ -33,6 +33,8 @@ static int flags_by_mnt(int mnt_flags) flags |= ST_UNBINDABLE; if (mnt_flags & MNT_SHARED) flags |= ST_SHARED; + else + flags |= ST_PRIVATE; return flags; } diff --git a/include/linux/statfs.h b/include/linux/statfs.h index 5416b2936dd9..1ea4a45aa6c3 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_PRIVATE (1<<18) /* change to private */ #define ST_SHARED (1<<20) /* change to shared */ #endif -- 2.17.0