mufs: add subtree argument to mkpath() to create a path for an existing tree object

source/fs/mufs/dir.c

@@ -316,7 +316,7 @@ int mufs_readdir(struct mufs_dir *dir, struct mufs_dirent *dirent)
 
 int mufs_mkdir(struct mufs *fs, const char *path)
 {
-	return mufs_mkpath(fs, path, MUFS_DIR);
+	return mufs_mkpath(fs, path, NULL, MUFS_DIR);
 }
 
 int mufs_rmdir(struct mufs *fs, const char *path)

source/fs/mufs/file.c

@@ -21,7 +21,7 @@ struct mufs_file {
 
 int mufs_create(struct mufs *fs, const char *path)
 {
-	return mufs_mkpath(fs, path, MUFS_FILE);
+	return mufs_mkpath(fs, path, NULL, MUFS_FILE);
 }
 
 struct mufs_file *mufs_open(struct mufs *fs, const char *path, int mode)

source/fs/mufs/path.c

@@ -13,7 +13,8 @@
 #include "path.h"
 #include "tree.h"
 
-int mufs_mkpath(struct mufs *fs, const char *path, unsigned type)
+int mufs_mkpath(struct mufs *fs, const char *path, struct mufs_tree *subtree,
+	unsigned type)
 {
 	struct mufs_stat stat;
 	struct mufs_dirent dirent;
@@ -43,15 +44,20 @@ int mufs_mkpath(struct mufs *fs, const char *path, unsigned type)
 	if (!(tree = resolve_path(fs, s, &stat)) || stat.type != MUFS_DIR)
 		return -1;
 
+	memset(&dirent, 0, sizeof dirent);
+
 	len = min(strlen(name), sizeof(dirent.path) - 1);
 	memcpy(dirent.path, name, len);
 	dirent.path[len] = '\0';
 	dirent.type = type;
 
 	dirent.tree.fs = fs;
-	dirent.tree.file_size = 0;
-	dirent.tree.root = 0;
-	dirent.tree.depth = 0;
+
+	if (subtree) {
+		dirent.tree.file_size = subtree->file_size;
+		dirent.tree.root = subtree->root;
+		dirent.tree.depth = subtree->depth;
+	}
 
 	tree->file_size = find_dirent_size(fs, tree, tree->file_size);
 

source/fs/mufs/path.h

@@ -1,4 +1,5 @@
 #pragma once
 
-int mufs_mkpath(struct mufs *fs, const char *path, unsigned type);
+int mufs_mkpath(struct mufs *fs, const char *path, struct mufs_tree *subtree,
+	unsigned type);
 int mufs_rmpath(struct mufs *fs, const char *path);