1 files changed, 14 insertions, 0 deletions
diff --git a/kernel/buf.h b/kernel/buf.h
new file mode 100644
index 0000000..3266495
--- /dev/null
+++ b/kernel/buf.h
@@ -0,0 +1,14 @@
+struct buf {
+  int flags;
+  uint dev;
+  uint blockno;
+  struct sleeplock lock;
+  uint refcnt;
+  struct buf *prev; // LRU cache list
+  struct buf *next;
+  struct buf *qnext; // disk queue
+  uchar data[BSIZE];
+};
+#define B_VALID 0x2  // buffer has been read from disk
+#define B_DIRTY 0x4  // buffer needs to be written to disk
+