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| author | Lars Ellenberg <lars.ellenberg@linbit.com> | 2011-10-27 16:52:30 +0200 |
|---|---|---|
| committer | Philipp Reisner <philipp.reisner@linbit.com> | 2012-05-09 15:15:56 +0200 |
| commit | f479ea06613514814449f28cba6488e31698e406 (patch) | |
| tree | b7baebab348fe1deaa6454623564359797afe09b /drivers/block/drbd/drbd_int.h | |
| parent | a2e9138197405a4c051630416ceebf98158e631d (diff) | |
| download | op-kernel-dev-f479ea06613514814449f28cba6488e31698e406.zip op-kernel-dev-f479ea06613514814449f28cba6488e31698e406.tar.gz | |
drbd: send intermediate state change results to the peer
DRBD state changes schedule after_state_ch() actions to a worker thread,
which decides on the old and new states of that change, whether to send
an informational state update packet (P_STATE) to the peer.
If it decides to drbd_send_state(), it would however always send the
_curent_ state, which, if a second state change happens before the
after_state_ch() of the first ran, may "fast-forward" the peer's view
about this node. In most cases that is harmless, but sometimes this can
confuse DRBD, for example into not actually starting a necessary resync
if you do a very tight detach/attach loop on a Connected Secondary.
Fix this by always sending the "new" state of the respective state
transition which scheduled this after_state_ch() work.
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_int.h')
| -rw-r--r-- | drivers/block/drbd/drbd_int.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/block/drbd/drbd_int.h b/drivers/block/drbd/drbd_int.h index c7976a7..31dee20 100644 --- a/drivers/block/drbd/drbd_int.h +++ b/drivers/block/drbd/drbd_int.h @@ -1229,8 +1229,8 @@ extern int drbd_send_uuids(struct drbd_conf *mdev); extern int drbd_send_uuids_skip_initial_sync(struct drbd_conf *mdev); extern int drbd_gen_and_send_sync_uuid(struct drbd_conf *mdev); extern int drbd_send_sizes(struct drbd_conf *mdev, int trigger_reply, enum dds_flags flags); -extern int _drbd_send_state(struct drbd_conf *mdev); -extern int drbd_send_state(struct drbd_conf *mdev); +extern int drbd_send_state(struct drbd_conf *mdev, union drbd_state s); +extern int drbd_send_current_state(struct drbd_conf *mdev); extern int _drbd_send_cmd(struct drbd_conf *mdev, struct socket *sock, enum drbd_packets cmd, struct p_header80 *h, size_t size, unsigned msg_flags); |
