From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: ARC-Seal: i=1; a=rsa-sha256; t=1523635909; cv=none; d=google.com; s=arc-20160816; b=sCexvbVQGVK64GOxMIEZewSS842A91MPW5R/rzrqj92sxWTiaJaK09998P5X0YrmiM TOL6cpThB3Rr5SUGUMLJJoOLbtAyhaU69FxfSi0p0fyy6+Ut338GCuU8ext6YGKf3zXH ar9UKqM8048vrSDfvXGbPWgBBm1SaSmnhTM7yaZG/js9/G3bJHA1ENgEFT73eW3IFY5L yq9Q8Y3nV28QW/aO12Fi5cS1IVTSzKB7JAJzjSJve96/GNSfZSHW6FfQS9z2ZKEPVbVr B45JER0n7qe7DM+w5SAaF2ULC+SEVr/0PhZBDZ00tKRDXc0e4YL6xy5jVg5hGCknkJ3z 0dgg== 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=bQMLvV0Ko6+62/3QhUYTnjSM6q/HltMW5KN/AdFhXts=; b=UagHgmvmrqRbRgtlna/WPiCIxRk40UZbpR1yNdG3M5Ph9vsUPKTMQIGMHQiefPKF5q Ji9OaZgrNieydyHeZ2mwQGdFEUC02aWn9B+WQvhkx1jpEm513VPFji2TSPYpTGTbDWhj BnZE26/iOP9Rc9MYFCgq8irqbG3R9xQXcV9t0DKyxUFl4szcYCLxrT1BKgGvbQmzwMLl cB9LLPTDkahKnfWIAD9T2ZZWP4Lf6to9BuZ6YzYJrY8prjQaUFDd5aYZPQTswbbP6c4n 1vfE+86qYYjnhANjshRFzPrQoHIX2tOn6WbJliVHXnn3gaaAKaDGZluxx8Yh2Or456HV 9qNg== 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/XJ6kJIfELH2P0ZHf95DSkvVXLVRh+YyxgKwrEdx/NoaRera0z8SSd0qEb46uEW+YA3tT64w== 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 3/6] statfs: add ST_UNBINDABLE Date: Fri, 13 Apr 2018 18:11:23 +0200 Message-Id: <20180413161126.31313-4-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?1597648047105357764?= X-GMAIL-MSGID: =?utf-8?q?1597648047105357764?= X-Mailing-List: linux-kernel@vger.kernel.org List-ID: This lets userspace query whether a mountpoint was made MS_UNBINDABLE. 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 5b2a24f0f263..61b3063d3921 100644 --- a/fs/statfs.c +++ b/fs/statfs.c @@ -29,6 +29,8 @@ static int flags_by_mnt(int mnt_flags) flags |= ST_NODIRATIME; if (mnt_flags & MNT_RELATIME) flags |= ST_RELATIME; + if (mnt_flags & MNT_UNBINDABLE) + flags |= ST_UNBINDABLE; return flags; } diff --git a/include/linux/statfs.h b/include/linux/statfs.h index b336c04e793c..e1b84d0388c1 100644 --- a/include/linux/statfs.h +++ b/include/linux/statfs.h @@ -40,5 +40,6 @@ struct kstatfs { #define ST_NOATIME (1<<10) /* do not update access times */ #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 */ #endif -- 2.17.0