wip: mount fixes

Author: m-hilgendorf

Diff for: packages/sandbox/src/linux/guest.rs

@@ -163,7 +163,7 @@ fn create_mountpoint_if_not_exists(source: &CString, target: &mut CString) {
 			match (*ptr.add(n), esc) {
 				(SLASH, false) => {
 					*ptr.add(n) = 0;
-					libc::mkdir(target.as_ptr(), libc::O_RDWR as _);
+					libc::mkdir(target.as_ptr(), 0o755);
 					*ptr.add(n) = SLASH;
 				},
 				(BACKSLASH, false) => {
@@ -178,9 +178,9 @@ fn create_mountpoint_if_not_exists(source: &CString, target: &mut CString) {
 			}
 		}
 		if is_dir {
-			libc::mkdir(target.as_ptr(), libc::O_RDWR as _);
+			libc::mkdir(target.as_ptr(), 0o755);
 		} else {
-			libc::creat(target.as_ptr(), libc::O_RDWR as _);
+			libc::creat(target.as_ptr(), 0o777);
 		}
 	}
 }

Diff for: packages/server/src/runtime/linux.rs

@@ -430,7 +430,7 @@ impl Runtime {
 							upperdir,
 							workdir,
 							merged: mount.target.clone(),
-							readonly: mount.readonly,
+							readonly: false,
 						});
 						overlays.last_mut().unwrap()
 					};
@@ -484,9 +484,12 @@ impl Runtime {
 				.into(),
 			);
 			instance.mounts.push(
-				sandbox::BindMount {
+				sandbox::Mount {
 					source: self.server.artifacts_path(),
 					target: "/.tangram/artifacts".into(),
+					fstype: None,
+					flags: libc::MS_BIND | libc::MS_REC,
+					data: None,
 					readonly: false,
 				}
 				.into(),

Diff for: packages/vfs/src/fuse.rs

@@ -616,7 +616,7 @@ where
 				bavail: u64::MAX / 2,
 				files: u64::MAX / 2,
 				ffree: u64::MAX / 2,
-				bsize: 0,
+				bsize: 65536,
 				namelen: u32::MAX,
 				frsize: 1024,
 				padding: 0,
@@ -649,7 +649,7 @@ where
 			flags: request.getattr_flags,
 			spare: [0; 2],
 			stat: sys::fuse_statx {
-				mask: 0,
+				mask: 0xffff_ffff,
 				ino: attr.attr.ino,
 				size: attr.attr.size,
 				blocks: attr.attr.blocks,