init: add an init_mkdir helper

Add a simple helper to mkdir with a kernel space file name and switch
the early init code over to it.  Remove the now unused ksys_mkdir.

Signed-off-by: Christoph Hellwig <hch@lst.de>

1 files changed, 18 insertions, 0 deletions

diff --git a/fs/init.c b/fs/init.c
index 09ef2b58d48ca..127033d084260 100644
--- a/fs/init.c
+++ b/fs/init.c
@@ -176,6 +176,24 @@ int __init init_unlink(const char *pathname)
 	return do_unlinkat(AT_FDCWD, getname_kernel(pathname));
 }
 
+int __init init_mkdir(const char *pathname, umode_t mode)
+{
+	struct dentry *dentry;
+	struct path path;
+	int error;
+
+	dentry = kern_path_create(AT_FDCWD, pathname, &path, LOOKUP_DIRECTORY);
+	if (IS_ERR(dentry))
+		return PTR_ERR(dentry);
+	if (!IS_POSIXACL(path.dentry->d_inode))
+		mode &= ~current_umask();
+	error = security_path_mkdir(&path, dentry, mode);
+	if (!error)
+		error = vfs_mkdir(path.dentry->d_inode, dentry, mode);
+	done_path_create(&path, dentry);
+	return error;
+}
+
 int __init init_rmdir(const char *pathname)
 {
 	return do_rmdir(AT_FDCWD, getname_kernel(pathname));