From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: ARC-Seal: i=1; a=rsa-sha256; t=1523635910; cv=none; d=google.com; s=arc-20160816; b=JoJzLSOSNnEo0xja/7wM8By2dqvXZvDQM761rOtkzTvqmb5v3R5C549gswoiQGo5UZ ZG+1qFJNS8Cv4STpo0iDUAZNL0xSL5A+b6cHjA36pjRWr9p9cghoPS+zh05UYYXYjQzy 694gDHfbUS0XTNrCPUy2T7tSWj/XIJGeXoueiUZUMxwqGWS5iB6Cc0iSWxwO+8U055q7 SvsBNggfbw+kSIFpOa2kSMfWEah+CTapkuYwLYdrCp3W2CPj8AatYRH1WEMEO8sxKboi 7uwALC4Y06FSHCCZTbfPpcqbPquqUQ1Celib8ZkWRIUybNg/gV+eNRksP67SP0bsuAjj JV0w== 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=skkXM04WjM7UeWsHfWHN3Lcgjql4mHKU2ojImbeCSiE=; b=rKcVeWcdMH+p4ORYhSblard34Ks+p/rLNOVEluACD61TxgZTHYjA6WEnXb5XAwc/LL eDS9Io+sezIhhE5XSovqXiKiXWlnmRRzfRpMK7A7meMUtEXw3gI3lDDPSs7fU25dlJJ0 yzzni4YGA1ROrpswKwWN5PVAg+Pq8iMFp3X5f6j9livgQKh1lcbmFio4httdKxLOpClx DPO2rQImM0sufdcBdC8G9cTUOU9kvFC9nm4zo4sAMCRno4DPvaamaABLhHiy5qdREc9k 5+SYh01T7+HFxSH1s+b5JKH7T2JNznhEtahrbivUB2GQnAGkKhWbMc3J97BBu8i4H4cm npwg== 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: AIpwx49eVhsBWkkKiD7It7nYVwu/RRfTktE/nSpW5B3p9mUiZAhTDjy1+W4KgAzTUBwEBW8l5JTl7g== From: Christian Brauner To: viro@zeniv.linux.org.uk, tglx@linutronix.de, kstewart@linuxfoundation.org, gregkh@linuxfoundation.org, pombredanne@nexb.com, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, serge@hallyn.com Cc: Christian Brauner Subject: [PATCH 4/6] statfs: add ST_SHARED Date: Fri, 13 Apr 2018 18:11:24 +0200 Message-Id: <20180413161126.31313-5-christian.brauner@ubuntu.com> X-Mailer: git-send-email 2.17.0 In-Reply-To: <20180413161126.31313-1-christian.brauner@ubuntu.com> References: <20180413161126.31313-1-christian.brauner@ubuntu.com> X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: =?utf-8?q?1597648048961369415?= X-GMAIL-MSGID: =?utf-8?q?1597648048961369415?= 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 --- 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