From 347dc63c65a3f0f3830b28652882228e0aee6088 Mon Sep 17 00:00:00 2001
From: Ted Brandston <dogmatixed@gmail.com>
Date: Thu, 10 Apr 2025 14:12:20 -0400
Subject: [PATCH] Add MS_NOSYMFOLLOW flag

MS_NOSYMFOLLOW (since Linux 5.10) disallows automatic following of symlinks.

Added to rust-lang/libc in 0.2.176

See:
https://github.com/torvalds/linux/commit/dab741e0e02bd3c4f5e2e97be74b39df2523fc6e
https://github.com/rust-lang/libc/releases/tag/0.2.176
---
 Cargo.toml              | 2 +-
 changelog/2685.added.md | 1 +
 src/mount/linux.rs      | 2 ++
 3 files changed, 4 insertions(+), 1 deletion(-)
 create mode 100644 changelog/2685.added.md

diff --git a/Cargo.toml b/Cargo.toml
index bcca102820..5c5fdd6af6 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -28,7 +28,7 @@ targets = [
 ]
 
 [dependencies]
-libc = { version = "=0.2.175", features = ["extra_traits"] }
+libc = { version = "=0.2.176", features = ["extra_traits"] }
 bitflags = "2.3.3"
 cfg-if = "1.0"
 pin-utils = { version = "0.1.0", optional = true }
diff --git a/changelog/2685.added.md b/changelog/2685.added.md
new file mode 100644
index 0000000000..f34630f8fd
--- /dev/null
+++ b/changelog/2685.added.md
@@ -0,0 +1 @@
+Added MS_NOSYMFOLLOW flag, a mount option on linux which disallows automatic following of symlinks.
diff --git a/src/mount/linux.rs b/src/mount/linux.rs
index 3c27150761..5fb38a7438 100644
--- a/src/mount/linux.rs
+++ b/src/mount/linux.rs
@@ -21,6 +21,8 @@ libc_bitflags!(
         MS_MANDLOCK;
         /// Directory modifications are synchronous
         MS_DIRSYNC;
+        /// Do not follow symlinks
+        MS_NOSYMFOLLOW;
         /// Do not update access times
         MS_NOATIME;
         /// Do not update directory access times