Added very basic vfs

1 files changed, 66 insertions, 0 deletions

diff --git a/src/kernel/fs/vfs.h b/src/kernel/fs/vfs.h
new file mode 100644
index 0000000..41d80eb
--- /dev/null
+++ b/src/kernel/fs/vfs.h
@@ -0,0 +1,66 @@
+#ifndef MELVIX_VFS_H
+#define MELVIX_VFS_H
+
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdint.h>
+
+#define MAX_NAME_LENGTH 128
+
+enum node_type {
+	FILE_NODE = 1,
+	DIR_NODE,
+	CHAR_DEV_NODE,
+	BLOCK_DEV_NODE,
+	PIPE_NODE,
+	SYMLINK_NODE,
+	MOUNTPOINT_NODE = 8
+};
+
+struct fs_node;
+struct dir_entry;
+
+typedef uint32_t (*read)(struct fs_node *, size_t, size_t, char *);
+typedef uint32_t (*write)(struct fs_node *, size_t, size_t, char *);
+typedef void (*open)(struct fs_node *);
+typedef void (*close)(struct fs_node *);
+
+typedef struct dir_entry *(*read_dir)(struct fs_node *, size_t);
+typedef struct fs_node *(*find_dir)(struct fs_node *, char *);
+
+struct fs_node {
+	char name[MAX_NAME_LENGTH];
+	uint32_t length;
+	uint32_t inode;
+	uint32_t permissions;
+	uint32_t uid;
+	uint32_t gid;
+	enum node_type type;
+
+	struct fs_node *node_ptr;
+
+	void *impl;
+
+	read read;
+	write write;
+	open open;
+	close close;
+	read_dir read_dir;
+	find_dir find_dir;
+};
+
+struct dir_entry {
+	char name[MAX_NAME_LENGTH];
+	uint32_t inode;
+};
+
+struct fs_node *fs_root;
+
+uint32_t read_fs_node(struct fs_node *node, size_t offset, size_t size, char *buf);
+uint32_t write_fs_node(struct fs_node *node, size_t offset, size_t size, char *buf);
+void open_fs_node(struct fs_node *node, bool read, bool write);
+void close_fs_node(struct fs_node *node);
+struct dir_entry *read_dir_node(struct fs_node *node, size_t index);
+struct fs_node *find_dir_node(struct fs_node *node, char *name);
+
+#endif