Handle disk partitioning

kernel/storedev/partsd.h

@@ -0,0 +1,27 @@
+#ifndef STOREDEV_PARTSD_H_
+#define STOREDEV_PARTSD_H_
+
+#include <stdint.h>
+#include <stddef.h>
+
+struct StoreDev;
+
+typedef struct {
+  struct StoreDev *parent;
+  size_t sectorcount;
+  size_t startsector;
+} PartSd;
+
+typedef struct {
+  struct StoreDev *parent;
+  size_t sectorcount;
+  size_t startsector;
+} PartSdInitExtra;
+
+int32_t partsd_init(struct StoreDev *sd, void *extra);
+int32_t partsd_read(struct StoreDev *sd, uint8_t *const buffer, ptrdiff_t sector, ptrdiff_t off, size_t size);
+int32_t partsd_write(struct StoreDev *sd, const uint8_t *const buffer, ptrdiff_t sector, ptrdiff_t off, size_t size);
+int32_t partsd_cleanup(struct StoreDev *sd);
+size_t partsd_capacity(struct StoreDev *sd);
+
+#endif // STOREDEV_PARTSD_H_