Remove the shim kernel crate

kernel/src/syscall/mkdir.rs

@@ -0,0 +1,48 @@
+// SPDX-License-Identifier: MPL-2.0
+
+use super::SyscallReturn;
+use crate::{
+    fs::{
+        file_table::FileDesc,
+        fs_resolver::{FsPath, AT_FDCWD},
+        utils::{InodeMode, InodeType},
+    },
+    prelude::*,
+    syscall::constants::MAX_FILENAME_LEN,
+};
+
+pub fn sys_mkdirat(
+    dirfd: FileDesc,
+    path_addr: Vaddr,
+    mode: u16,
+    ctx: &Context,
+) -> Result<SyscallReturn> {
+    let path = ctx
+        .get_user_space()
+        .read_cstring(path_addr, MAX_FILENAME_LEN)?;
+    debug!("dirfd = {}, path = {:?}, mode = {}", dirfd, path, mode);
+
+    let current = ctx.process;
+    let (dir_dentry, name) = {
+        let path = path.to_string_lossy();
+        if path.is_empty() {
+            return_errno_with_message!(Errno::ENOENT, "path is empty");
+        }
+        let fs_path = FsPath::new(dirfd, path.as_ref())?;
+        current
+            .fs()
+            .read()
+            .lookup_dir_and_new_basename(&fs_path, true)?
+    };
+
+    let inode_mode = {
+        let mask_mode = mode & !current.umask().read().get();
+        InodeMode::from_bits_truncate(mask_mode)
+    };
+    let _ = dir_dentry.new_fs_child(name.trim_end_matches('/'), InodeType::Dir, inode_mode)?;
+    Ok(SyscallReturn::Return(0))
+}
+
+pub fn sys_mkdir(path_addr: Vaddr, mode: u16, ctx: &Context) -> Result<SyscallReturn> {
+    self::sys_mkdirat(AT_FDCWD, path_addr, mode, ctx)
+}