From 50e6b22b3a47b0aaa142dd782587d94d37a72df4 Mon Sep 17 00:00:00 2001
From: Manabu Sugimoto <Manabu.Sugimoto@sony.com>
Date: Wed, 26 May 2021 15:06:58 +0900
Subject: [PATCH] Add MS_LAZYTIME flag

MS_LAZYTIME (since Linux 4.0) reduces on-disk updates of inode
timestamps (atime, mtime, ctime) by maintaining these changes only in memory.

Signed-off-by: Manabu Sugimoto <Manabu.Sugimoto@sony.com>
---
 CHANGELOG.md | 2 ++
 Cargo.toml   | 2 +-
 src/mount.rs | 1 +
 3 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1e163be9af..bad50adcde 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,8 @@ This project adheres to [Semantic Versioning](https://semver.org/).
 - Added TIMESTAMPNS support for linux
   (#[1402](https://github.com/nix-rust/nix/pull/1402))
 - Added `sendfile64` (#[1439](https://github.com/nix-rust/nix/pull/1439))
+- Added `MS_LAZYTIME` to `MsFlags`
+  (#[1437](https://github.com/nix-rust/nix/pull/1437))
 
 ### Changed
 - Made `forkpty` unsafe, like `fork`
diff --git a/Cargo.toml b/Cargo.toml
index 9a3aada904..a2aa41ffb6 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -32,7 +32,7 @@ targets = [
 ]
 
 [dependencies]
-libc = { version = "0.2.93", features = [ "extra_traits" ] }
+libc = { version = "0.2.95", features = [ "extra_traits" ] }
 bitflags = "1.1"
 cfg-if = "1.0"
 
diff --git a/src/mount.rs b/src/mount.rs
index 2c54761e2b..edb8afbd71 100644
--- a/src/mount.rs
+++ b/src/mount.rs
@@ -38,6 +38,7 @@ libc_bitflags!(
         MS_KERNMOUNT;
         MS_I_VERSION;
         MS_STRICTATIME;
+        MS_LAZYTIME;
         MS_ACTIVE;
         MS_NOUSER;
         MS_RMT_MASK;