Add initial virtiofs support

init/src/main.rs

@@ -1,9 +1,9 @@
 //! boco universal init.
 //!
 //! Injected by `boco build` at /boco/init and invoked via init=/boco/init.
-//! Sets up devices, filesystems, networking, and 9p shares, then execs the
-//! container's CMD/ENTRYPOINT (or a runtime override) with execvp so the
-//! command becomes PID 1 directly.
+//! Sets up devices, filesystems, networking, and virtio-fs shares, then
+//! execs the container's CMD/ENTRYPOINT (or a runtime override) with
+//! execvp so the command becomes PID 1 directly.
 
 use base64::Engine;
 use nix::mount::{MsFlags, mount};
@@ -208,7 +208,7 @@ fn setup_networking() {
     });
 }
 
-fn setup_9p_shares(workdir: &str) {
+fn setup_virtiofs_shares(workdir: &str) {
     let cmdline = match fs::read_to_string("/proc/cmdline") {
         Ok(c) => c,
         Err(e) => {
@@ -227,12 +227,12 @@ fn setup_9p_shares(workdir: &str) {
                 Ok(bytes) => match String::from_utf8(bytes) {
                     Ok(s) => s,
                     Err(e) => {
-                        warn(&format!("9p: invalid UTF-8 in guest path: {e}"));
+                        warn(&format!("virtiofs: invalid UTF-8 in guest path: {e}"));
                         continue;
                     }
                 },
                 Err(e) => {
-                    warn(&format!("9p: base64 decode failed: {e}"));
+                    warn(&format!("virtiofs: base64 decode failed: {e}"));
                     continue;
                 }
             };
@@ -248,9 +248,9 @@ fn setup_9p_shares(workdir: &str) {
             try_mount(
                 Some(tag),
                 &dest,
-                Some("9p"),
+                Some("virtiofs"),
                 MsFlags::empty(),
-                Some("trans=virtio,version=9p2000.L"),
+                None,
             );
         }
     }
@@ -412,9 +412,9 @@ fn main() {
     // === Networking ===
     setup_networking();
 
-    // === 9p shares ===
+    // === virtio-fs shares ===
     let workdir = read_file_opt("/boco/workdir").unwrap_or_default();
-    setup_9p_shares(&workdir);
+    setup_virtiofs_shares(&workdir);
 
     // === Environment & working directory ===
     apply_env();