devfs initial implementation

src/fs/devfs.c

@@ -0,0 +1,88 @@
+#include <kernel/devfs.h>
+#include <kernel/vfs.h>
+#include <kernel/alloc.h>
+#include <hashtable.h>
+
+#include <sys/sysmacros.h>
+
+static hashtable devnodes;
+static fs_t* fs;
+
+static int devfs_mount(dirnode_t* mountpoint, vnode_t* device, int mountflags, void* fsinfo){
+	
+	dirnode_t* node = vfs_newdirnode(mountpoint->vnode.name, fs, 0);
+	
+	if(!node)
+		return ENOMEM;
+	
+	mountpoint->mount = node;
+	node->vnode.parent = mountpoint->vnode.parent;
+	
+	return 0;
+}
+
+static int devfs_unmount() UNIMPLEMENTED
+static int devfs_open(dirnode_t* parent, char* name){
+	
+	vnode_t* devnode = hashtable_get(&devnodes, name);
+	
+	if(!devnode)
+		return ENOENT;
+
+	vnode_t* node = vfs_newnode(name, fs, devnode);
+	
+	if(!node)
+		return ENOMEM;
+
+	if(!hashtable_insert(&parent->children, name, node)){
+		vfs_destroynode(node);
+		return ENOMEM;
+	}
+
+	return 0;
+
+}
+
+static int devfs_close() UNIMPLEMENTED
+static int devfs_mkdir() UNIMPLEMENTED
+static int devfs_create() UNIMPLEMENTED
+static int devfs_write() UNIMPLEMENTED
+static int devfs_read() UNIMPLEMENTED
+
+
+static fscalls_t devfscalls = {
+	devfs_mount, devfs_unmount, devfs_open, devfs_close, devfs_mkdir, devfs_create, devfs_write, devfs_read
+};
+
+void devfs_init(){
+
+	fs = alloc(sizeof(fs_t));
+	fs->calls = &devfscalls;
+	
+	hashtable_init(&devnodes, 10);
+
+}
+
+
+
+int devfs_newdevice(char* name, int type, dev_t dev, mode_t mode){
+	
+	vnode_t* node = vfs_newnode(name, fs, 0);
+	if(!node)
+		return ENOMEM;
+	
+	if(!hashtable_insert(&devnodes, name, node)){
+		vfs_destroynode(node);
+		return ENOMEM;
+	}
+	
+	node->st.st_rdev = dev;
+	node->st.st_mode = MAKETYPE(type) | mode;
+
+	return 0;
+	
+}
+
+fscalls_t* devfs_getfuncs(){
+	return &devfscalls;
+}