linux-toradex.git/include/linux/drbd.h, branch v3.8-rc6

drbd: Broadcast sync progress no more often than once per second

2012-11-09T13:11:43+00:00

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

drbd: disambiguation, s/ERR_DISCARD/ERR_DISCARD_IMPOSSIBLE/

2012-11-09T13:05:50+00:00

If for some reason (typically "split-brained" cluster manager)
drbd replica data has diverged, we can chose a victim,
and reconnect using "--discard-my-data", causing the victim
to become sync-target, fetching all changed blocks from the peer.

If we are Primary, we are potentially in use, and we refuse to
"roll back" changes to the data below the page cache and other users.

Rename the error symbol for this to ERR_DISCARD_IMPOSSIBLE.

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

drbd: introduce stop-sector to online verify

2012-11-09T13:05:32+00:00

We now can schedule only a specific range of sectors for online verify,
or interrupt a running verify without interrupting the connection.

Had to bump the protocol version differently, we are now 101.
Added verify_can_do_stop_sector() { protocol >= 97 && protocol != 100; }

Also, the return value convention for worker callbacks has changed,
we returned "true/false" for "keep the connection up" in 8.3,
we return 0 for success and <= for failure in 8.4.
Affected: receive_state()

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

drbd: New disk option al-updates

2012-11-08T15:58:31+00:00

By disabling al-updates one might increase performace. The price for
that is that in case a crashed primary (that had al-updates disabled)
is reintegraded, it will receive a full-resync instead of a bitmap
based resync.

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

drbd: Load balancing method: striping

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

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

drbd: Load balancing of read requests

2012-11-08T15:58:10+00:00

New config option for the disk secition "read-balancing", with
the values: prefer-local, prefer-remote, round-robin, when-congested-remote.

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

drbd: on attach, enforce clean meta data

2012-11-08T15:57:51+00:00

Detection of unclean shutdown has moved into user space.

The kernel code will, whenever it updates the meta data, mark it as
"unclean", and will refuse to attach to such unclean meta data.

"drbdadm up" now schedules "drbdmeta apply-al", which will apply
the activity log to the bitmap, and/or reinitialize it, if necessary,
as well as set a "clean" indicator flag.

This moves a bit code out of kernel space.
As a side effect, it also prevents some 8.3 module from accidentally
ignoring the 8.4 style activity log, if someone should downgrade,
whether on purpose, or accidentally because he changed kernel versions
without providing an 8.4 for the new kernel, and the new kernel comes
with in-tree 8.3.

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

drbd: Use the terminology suggested by the command names in the source code and messages

2012-11-08T15:57:44+00:00

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

drbd: spelling fix: too small

2012-11-08T15:57:44+00:00

It is not "to small", but "too small".

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

drbd: Refuse to change network options online when...

2012-11-08T15:55:52+00:00

* the peer does not speak protocol_version 100 and the
  user wants to change one of:
    - wire_protocol
    - two_primaries
    - integrity_alg

* the user wants to remove the allow_two_primaries flag
  when there are two primaries

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