linux-toradex.git/drivers/block/drbd/drbd_state.h, branch v4.4.73

drbd: fix race between role change and handshake

2014-11-10T16:27:35+00:00

Symptoms:
If DRBD was "cleanly shut down" (all in sync, both Secondary before
disconnect, identical data generation uuids), and then one side was
promoted *during* the next connection handshake, the role change
could confuse the handshake.

The Primary would get stuck in WFBitmapS, the Secondary would log
unexpected cstate (Connected) in receive_bitmap
and get stuck in WFBitmapT.

Fix:
The test in is_valid_soft_transition wrong. It works because
the not allowed actions (promote/attach) do not touch the
cstate. The previous condition failed to demand a cstate change
in one clause.

In order to avoid deadlocks give up the state_mutex while waiting
for the transient state to go away.

Conflicts:
	drbd/drbd_state.c
	drbd/drbd_state.h
	drbd/drbd_wrappers.h

Signed-off-by: Philipp Reisner 
Signed-off-by: Lars Ellenberg 
Signed-off-by: Jens Axboe

drbd: Rename drbd_tconn -> drbd_connection

2014-02-17T15:44:47+00:00

sed -i -e 's:all_tconn:connections:g' -e 's:tconn:connection:g'

Signed-off-by: Andreas Gruenbacher 
Signed-off-by: Philipp Reisner

drbd: Rename "mdev" to "device"

2014-02-17T15:42:24+00:00

sed -i -e 's:mdev:device:g'

Signed-off-by: Andreas Gruenbacher 
Signed-off-by: Philipp Reisner

drbd: Rename struct drbd_conf -> struct drbd_device

2014-02-17T15:36:44+00:00

sed -i -e 's:\:drbd_device:g'

Signed-off-by: Andreas Gruenbacher 
Signed-off-by: Philipp Reisner

drbd: Improved logging of state changes

2012-11-08T15:45:06+00:00

Signed-off-by: Philipp Reisner 
Signed-off-by: Lars Ellenberg

drbd: Implemented conn_lowest_disk()

2012-11-08T15:45:05+00:00

Signed-off-by: Philipp Reisner 
Signed-off-by: Lars Ellenberg

drbd: Implemented conn_lowest_conn()

2012-11-08T15:45:05+00:00

Signed-off-by: Philipp Reisner 
Signed-off-by: Lars Ellenberg

drbd: Introduced a new type union drbd_dev_state

2012-11-08T15:45:04+00:00

Signed-off-by: Philipp Reisner 
Signed-off-by: Lars Ellenberg

drbd: Introduced drbd_read_state()

2012-11-08T15:45:03+00:00

Signed-off-by: Philipp Reisner 
Signed-off-by: Lars Ellenberg

drbd: Allow to disconnect if one volume is diskless

2012-11-08T15:44:58+00:00

Signed-off-by: Philipp Reisner 
Signed-off-by: Lars Ellenberg