1 files changed, 13 insertions, 0 deletions
diff --git a/kernel/buf.h b/kernel/buf.h
new file mode 100644
index 0000000..4a3a39d
--- /dev/null
+++ b/kernel/buf.h
@@ -0,0 +1,13 @@
+struct buf {
+  int valid;   // has data been read from disk?
+  int disk;    // does disk "own" buf?
+  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];
+};
+