Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...

[cascardo/linux.git] / include / linux / nbd.h

diff --git a/include/linux/nbd.h b/include/linux/nbd.h
index d146ca1..5c86e2b 100644 (file)
--- a/include/linux/nbd.h
+++ b/include/linux/nbd.h
@@ -27,13 +27,22 @@
 #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,
+       /* there is a gap here to match userspace */
+       NBD_CMD_TRIM = 4
 };
 
+/* values for flags field */
+#define NBD_FLAG_HAS_FLAGS    (1 << 0) /* nbd-server supports flags */
+#define NBD_FLAG_READ_ONLY    (1 << 1) /* device is read-only */
+/* there is a gap here to match userspace */
+#define NBD_FLAG_SEND_TRIM    (1 << 5) /* send trim/discard */
+
 #define nbd_cmd(req) ((req)->cmd[0])
 
 /* userspace doesn't need the nbd_device structure */
@@ -42,10 +51,6 @@ enum {
 #include <linux/wait.h>
 #include <linux/mutex.h>
 
-/* values for flags field */
-#define NBD_READ_ONLY 0x0001
-#define NBD_WRITE_NOCHK 0x0002
-
 struct request;
 
 struct nbd_device {