Virtual filesystem and ramdiskfs

kernel/fs/vfs.h

@@ -0,0 +1,42 @@
+#ifndef _KERNEL_FS_VFS_H
+#define _KERNEL_FS_VFS_H
+
+#include <libk/hash.h>
+#include <libk/list.h>
+#include <libk/std.h>
+#include <m/fs_desc_buffer.h>
+#include <sync/spin_lock.h>
+
+#define VFS_OK        0
+#define VFS_EXISTS    1
+#define VFS_NOT_FOUND 2
+#define VFS_BAD_PATH  3
+#define VFS_OOB_ERROR 4
+
+#define VFS_RAMDISKFS 0
+
+struct vfs_mountpoint {
+  char key[0x100];
+  struct hash_node_link mount_table_link;
+  int fs_type;
+  spin_lock_t lock;
+  struct {
+    bool (*mount) (struct vfs_mountpoint* mountpoint);
+    int (*describe) (struct vfs_mountpoint* mountpoint, const char* path,
+                     struct fs_desc_buffer* desc);
+    int (*read) (struct vfs_mountpoint* mountpoint, const char* path, uint8_t* buffer, size_t off,
+                 size_t size);
+  } driver_ops;
+};
+
+struct vfs_mount_table {
+  struct hash_node_link* mountpoint_buckets[1024];
+  spin_lock_t lock;
+};
+
+struct vfs_mountpoint* vfs_create_mountpoint (const char* key, int fs_type);
+int vfs_describe (const char* mountpoint, const char* path, struct fs_desc_buffer* desc);
+int vfs_read (const char* mountpoint, const char* path, uint8_t* buffer, size_t off, size_t size);
+void vfs_init (void);
+
+#endif // _KERNEL_FS_VFS_H