Simple VFS layer

kernel/vfs/vfs.h

@@ -0,0 +1,46 @@
+#ifndef VFS_VFS_H_
+#define VFS_VFS_H_
+
+#include <stdint.h>
+#include <stddef.h>
+#include <stdbool.h>
+#include "spinlock/spinlock.h"
+#include "fs/kvfs/kvfs.h"
+
+#define VFS_MOUNTPOINT_LABEL_MAX 128
+#define VFS_MOUNTPOINTS_MAX 30
+
+enum {
+  VFS_FATFS,
+  VFS_KVFS,
+};
+
+typedef struct VfsMountPoint {
+  bool taken;
+  uint8_t label[VFS_MOUNTPOINT_LABEL_MAX];
+  int32_t fstype;
+
+  int32_t (*read)(struct VfsMountPoint *vmp, const char *path, uint8_t *const buffer, size_t n);
+  int32_t (*write)(struct VfsMountPoint *vmp, const char *path, const uint8_t *const buffer, size_t n);
+  int32_t (*remove)(struct VfsMountPoint *vmp, const char *path);
+  bool (*check)(void);
+
+  union {
+    Kvfs kvfs;
+  } fs;
+  SpinLock spinlock;
+} VfsMountPoint;
+
+typedef struct {
+  SpinLock spinlock;
+  VfsMountPoint mountpoints[VFS_MOUNTPOINTS_MAX];
+} VfsTable;
+
+extern VfsTable VFS_TABLE;
+
+void vfs_init(void);
+int32_t vfs_read(char *mountpoint, const char *path, uint8_t *const buffer, size_t n);
+int32_t vfs_write(char *mountpoint, const char *path, const uint8_t *const buffer, size_t n);
+int32_t vfs_remove(char *mountpoint, const char *path);
+
+#endif // VFS_VFS_H_