linux-stable.git/drivers/block/drbd/drbd_proc.c, branch linux-3.9.y

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: reset congestion information before reporting it in /proc/drbd

2012-11-08T15:58:39+00:00

We cache the congestion status in mdev->congestion_reason whenever
drbd_congested() was called.
Reset this cached info before reporting it when reading /proc/drbd.

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

drbd: Move list of epochs from mdev to tconn

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

This is necessary since the transfer_log on the sending is also
per tconn.

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

drbd: Move write_ordering from mdev to tconn

2012-11-08T15:58:07+00:00

This is necessary in order to prepare the move of the (receiver side)
epoch list from the device (mdev) to the connection (tconn) objects.

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

drbd: cosmetic: fix accidental division instead of modulo when pretty printing

2012-11-08T15:57:43+00:00

For large resync rates, seq_printf_with_thousands_grouping()
accidentally only produced Y,000,00Y, instead of the real numbers.

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

drbd: Removing drbd_cfg_rwsem

2012-11-08T15:55:48+00:00

 * Updates to all configuration items is done under genl_lock().
   Including removal of mdevs or tconns.
 * All read non sleeping read sides are protected by rcu
 * All sleeping read sides keep reference counts to keep the
   objects alive

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

drbd: rcu_read_lock() and rcu_dereference() for tconn->net_conf

2012-11-08T15:48:59+00:00

Removing the get_net_conf()/put_net_conf() calls

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

drbd: protect all idr accesses that might sleep with drbd_cfg_rwsem

2012-11-08T15:45:17+00:00

With this commit the locking for all accesses to IDRs is complete:

 * Non sleeping read accesses are protected by RCU
 * sleeping read accesses are protocted by a read lock on drbd_cfg_rwsem
 * accesses that add anything are protected by a write lock
 * accesses that remove an object are protoected by a write lock
   and a call to synchronize_rcu() after it is removed from the IDR
   and before the object is actually free()ed.

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

drbd: Renamed id_susp(union drbd_state s) to drbd_suspended(struct drbd_conf *)

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

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

drbd: Replaced the minor_table array by an idr

2011-10-14T14:48:01+00:00

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