Remove double "it", and redundant information about defaults

[nbd.git] / nbd.h

diff --git a/nbd.h b/nbd.h
index 6eab0ab..875c215 100644 (file)
--- a/nbd.h
+++ b/nbd.h
@@ -15,7 +15,7 @@
 #ifndef LINUX_NBD_H
 #define LINUX_NBD_H
 
-#include <linux/types.h>
+//#include <linux/types.h>
 
 #define NBD_SET_SOCK   _IO( 0xab, 0 )
 #define NBD_SET_BLKSIZE        _IO( 0xab, 1 )
@@ -27,13 +27,25 @@
 #define NBD_SET_SIZE_BLOCKS    _IO( 0xab, 7 )
 #define NBD_DISCONNECT  _IO( 0xab, 8 )
 #define NBD_SET_TIMEOUT _IO( 0xab, 9 )
+#define NBD_SET_FLAGS _IO( 0xab, 10 )
 
 enum {
        NBD_CMD_READ = 0,
        NBD_CMD_WRITE = 1,
-       NBD_CMD_DISC = 2
+       NBD_CMD_DISC = 2,
+       NBD_CMD_FLUSH = 3
 };
 
+#define NBD_CMD_MASK_COMMAND 0x0000ffff
+#define NBD_CMD_FLAG_FUA (1<<16)
+
+/* values for flags field */
+#define NBD_FLAG_HAS_FLAGS     (1 << 0)        /* Flags are there */
+#define NBD_FLAG_READ_ONLY     (1 << 1)        /* Device is read-only */
+#define NBD_FLAG_SEND_FLUSH    (1 << 2)        /* Send FLUSH */
+#define NBD_FLAG_SEND_FUA      (1 << 3)        /* Send FUA (Force Unit Access) */
+#define NBD_FLAG_ROTATIONAL    (1 << 4)        /* Use elevator algorithm - rotational media */
+
 #define nbd_cmd(req) ((req)->cmd[0])
 
 /* userspace doesn't need the nbd_device structure */