feat(bin/ofs): privileged mount (#4507)

* feat: privileged mount

* chore

bin/ofs/Cargo.toml

@@ -39,13 +39,13 @@ fuse3 = { "version" = "0.7.1", "features" = ["tokio-runtime", "unprivileged"] }
 futures-util = "0.3.30"
 libc = "0.2.151"
 log = "0.4.21"
-nix = { version = "0.27.1", features = ["user"] }
+nix = { version = "0.28.0", features = ["user"] }
 opendal = { version = "0.45.1", path = "../../core" }
 sharded-slab = "0.1.7"
-tokio = { version = "1.37", features = [
+tokio = { version = "1.37.0", features = [
  "fs",
  "macros",
- "rt-multi-thread",
+ "rt",
  "io-std",
  "signal",
 ] }

bin/ofs/src/bin/ofs.rs

@@ -18,7 +18,8 @@
 use anyhow::Result;
 use clap::Parser;
 
-#[tokio::main]
+// FIXME: https://github.com/apache/opendal/issues/4512
+#[tokio::main(flavor = "current_thread")]
 async fn main() -> Result<()> {
  let cfg = ofs::Config::parse();
 

bin/ofs/src/lib.rs

@@ -77,12 +77,20 @@ async fn execute_inner(args: Args) -> Result<()> {
  mount_option.uid(uid.into());
  mount_option.gid(gid.into());
  mount_option.no_open_dir_support(true);
+ mount_option.read_only(true);
 
  let adapter = fuse::Fuse::new(args.backend, uid.into(), gid.into());
 
- let mut mount_handle = Session::new(mount_option)
- .mount_with_unprivileged(adapter, args.mount_path)
- .await?;
+ let session = Session::new(mount_option);
+
+ let mut mount_handle = if uid.is_root() {
+ session.mount(adapter, args.mount_path).await?
+ } else {
+ log::warn!("unprivileged mount may not detect external unmount, tracking issue: https://github.com/Sherlock-Holo/fuse3/issues/72");
+ session
+ .mount_with_unprivileged(adapter, args.mount_path)
+ .await?
+ };
 
  let handle = &mut mount_handle;