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| author | Philipp Reisner <philipp.reisner@linbit.com> | 2011-04-14 01:24:47 +0200 |
|---|---|---|
| committer | Philipp Reisner <philipp.reisner@linbit.com> | 2012-11-08 16:45:18 +0100 |
| commit | 303d1448a048fb5b099babc5f41d0b1e22238778 (patch) | |
| tree | dccb81765e81d3275addf91ff9644bacdda64b60 /drivers/block/drbd/drbd_req.h | |
| parent | drbd: protect all idr accesses that might sleep with drbd_cfg_rwsem (diff) | |
| download | linux-303d1448a048fb5b099babc5f41d0b1e22238778.tar.xz linux-303d1448a048fb5b099babc5f41d0b1e22238778.zip | |
drbd: Runtime changeable wire protocol
The wire protocol is no longer a property that is negotiated
between the two peers. It is now expressed with two bits
(DP_SEND_WRITE_ACK and DP_SEND_RECEIVE_ACK) in each data
packet. Therefore the primary node is free to change the
wire protocol at any time without disconnect/reconnect.
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Diffstat (limited to 'drivers/block/drbd/drbd_req.h')
| -rw-r--r-- | drivers/block/drbd/drbd_req.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/block/drbd/drbd_req.h b/drivers/block/drbd/drbd_req.h index 0dabfa9c82f3..5135c95fbf85 100644 --- a/drivers/block/drbd/drbd_req.h +++ b/drivers/block/drbd/drbd_req.h @@ -198,6 +198,12 @@ enum drbd_req_state_bits { /* The peer has sent a retry ACK */ __RQ_POSTPONED, + + /* We expect a receive ACK (wire proto B) */ + __RQ_EXP_RECEIVE_ACK, + + /* We expect a write ACK (wite proto C) */ + __RQ_EXP_WRITE_ACK, }; #define RQ_LOCAL_PENDING (1UL << __RQ_LOCAL_PENDING) @@ -219,6 +225,8 @@ enum drbd_req_state_bits { #define RQ_WRITE (1UL << __RQ_WRITE) #define RQ_IN_ACT_LOG (1UL << __RQ_IN_ACT_LOG) #define RQ_POSTPONED (1UL << __RQ_POSTPONED) +#define RQ_EXP_RECEIVE_ACK (1UL << __RQ_EXP_RECEIVE_ACK) +#define RQ_EXP_WRITE_ACK (1UL << __RQ_EXP_WRITE_ACK) /* For waking up the frozen transfer log mod_req() has to return if the request should be counted in the epoch object*/ |