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drbd: fix DRBD_VOLUME_MAX 65535 -> 65534

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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>
Link: https://lore.kernel.org/r/20230113123538.144276-3-christoph.boehmwalder@linbit.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Robert Altnoeder 2023-01-13 13:35:32 +01:00 committed by Jens Axboe
parent 3780006867
commit 2167879655
1 changed files with 1 additions and 1 deletions
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2
include/linux/drbd_limits.h
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@ -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