diff mbox series

[2/8] drbd: fix DRBD_VOLUME_MAX 65535 -> 65534

Message ID 20230113123538.144276-3-christoph.boehmwalder@linbit.com (mailing list archive)
State New, archived
Headers show
Series Miscellaneous DRBD reorganization | expand

Commit Message

Christoph Böhmwalder Jan. 13, 2023, 12:35 p.m. UTC 
From: Robert Altnoeder <robert.altnoeder@linbit.com>

The protocol uses -1 as a reserved value for
'no specific volume', and since the protocol field
is a 16 bit unsigned value, -1 is converted to
65535. Therefore, limit the range of valid volume
numbers to [0, 65534].

Signed-off-by: Robert Altnoeder <robert.altnoeder@linbit.com>
Signed-off-by: Christoph Böhmwalder <christoph.boehmwalder@linbit.com>
Reviewed-by: Joel Colledge <joel.colledge@linbit.com>
---
 include/linux/drbd_limits.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/include/linux/drbd_limits.h b/include/linux/drbd_limits.h
index d64271ccece4..058f7600f79c 100644
--- a/include/linux/drbd_limits.h
+++ b/include/linux/drbd_limits.h
@@ -21,7 +21,7 @@ 
 #define DRBD_MINOR_COUNT_DEF 32
 #define DRBD_MINOR_COUNT_SCALE '1'
 
-#define DRBD_VOLUME_MAX 65535
+#define DRBD_VOLUME_MAX 65534
 
 #define DRBD_DIALOG_REFRESH_MIN 0
 #define DRBD_DIALOG_REFRESH_MAX 600