VFS stub

src/fs/Makefile

@@ -0,0 +1,12 @@
+objects := $(patsubst %.c,%.o,$(wildcard *.c))
+subdirs :=
+OBJPATH=$(OBJDIR)/fs
+export
+
+all: $(subdirs) $(objects)
+	for subdir in $(subdirs) ; do $(MAKE) -C $${subdir} ; done
+
+%.o: %.c
+	$(CC) $(CFLAGS) -o $@ $<
+	mkdir -p $(OBJPATH) 
+	cp $@ $(OBJPATH)/$@

src/fs/vfs.c

@@ -0,0 +1,113 @@
+#include <kernel/vfs.h>
+#include <kernel/alloc.h>
+#include <hashtable.h>
+#include <stdio.h>
+#include <string.h>
+
+dirnode_t* vfsroot;
+
+vnode_t* vfs_newnode(fs_t* fs, void* fsdata){
+	vnode_t* node = alloc(sizeof(vnode_t));
+	if(!node) return NULL;
+	node->fs = fs;
+	node->fsdata = fsdata;
+	
+	return node;
+}
+
+
+dirnode_t* vfs_newdirnode(fs_t* fs, void* fsdata){
+	
+	dirnode_t* node = alloc(sizeof(dirnode_t));
+	if(!node) return NULL;
+	vnode_t* vnode = (vnode_t*)node;
+
+	if(!hashtable_init(&node->children, 10)){ // add more here later
+		free(node);
+		return NULL;
+	}
+	
+	vnode->st.st_mode = MAKETYPE(TYPE_DIR);
+	vnode->fs = fs;
+	vnode->fsdata = fsdata;
+}
+
+int vfs_resolvepath(vnode_t** result, dirnode_t* ref, char *path){
+	
+	dirnode_t* iterator = ref;
+	char name[512];
+	off_t nameoffset = 0;
+
+	while(nameoffset <= strlen(path)){
+		
+		size_t offset = 0;
+
+		while(path[nameoffset])
+			name[offset++] = path[nameoffset++];
+
+		name[offset] = 0;
+
+		// make sure we're a directory
+
+		if(!GETTYPE(iterator->vnode.st.st_mode) == TYPE_DIR)
+			return ENOTDIR;
+		
+		// find correct node if mountmoint
+
+		while(iterator->mountednode)
+			iterator = iterator->mountednode;
+		
+		vnode_t* child = hashtable_get(&iterator->children, name);
+
+		if(!child){
+			// open it
+			int status = iterator->vnode.fs->calls->open(iterator, name);
+			if(status)
+				return status;
+
+			child = hashtable_get(&iterator->children, name);
+			
+		}
+
+		iterator = (dirnode_t*)child;
+
+	}
+	
+	*result = (vnode_t*)iterator;
+
+	return 0;
+
+}
+
+void vfs_destroynode(vnode_t* node){
+	
+	if(GETTYPE(node->st.st_mode) == TYPE_DIR)
+		hashtable_destroy(&((dirnode_t*)node)->children);
+	
+	free(node);
+
+}
+
+dirnode_t* vfs_root(){
+	return vfsroot;
+}
+
+void vfs_acquirenode(vnode_t* node){
+	while(node){
+		++node->refcount;
+		node = (vnode_t*)node->parent;
+	}
+}
+
+void vfs_releasenode(vnode_t* node){
+	while(node){
+		--node->refcount;
+		node = (vnode_t*)node->parent;
+	}
+}
+
+void vfs_init(){
+	printf("Creating a fake root for the VFS\n");
+	
+	vfsroot = vfs_newdirnode(NULL, NULL);
+}