From a3fffcc63b9502645d20a90efc1b684bd35f9c20 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ren=C3=A9=20Nussbaumer?= <rn@google.com>
Date: Fri, 7 Jan 2011 14:10:48 +0100
Subject: [PATCH] Make it possible to pause/resume sync of mirrored dev
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Signed-off-by: RenΓ© Nussbaumer <rn@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>
---
lib/bdev.py | 38 ++++++++++++++++++++++++++++++++++++++
1 file changed, 38 insertions(+)
diff --git a/lib/bdev.py b/lib/bdev.py
index 13b856625..7904eeab6 100644
--- a/lib/bdev.py
+++ b/lib/bdev.py
@@ -230,6 +230,20 @@ class BlockDev(object):
result = result and child.SetSyncSpeed(speed)
return result
+ def PauseResumeSync(self, pause):
+ """Pause/Resume the sync of the mirror.
+
+ In case this is not a mirroring device, this is no-op.
+
+ @param pause: Wheater to pause or resume
+
+ """
+ result = True
+ if self._children:
+ for child in self._children:
+ result = result and child.PauseResumeSync(pause)
+ return result
+
def GetSyncStatus(self):
"""Returns the sync status of the device.
@@ -1488,6 +1502,30 @@ class DRBD8(BaseDRBD):
children_result = super(DRBD8, self).SetSyncSpeed(kbytes)
return self._SetMinorSyncSpeed(self.minor, kbytes) and children_result
+ def PauseResumeSync(self, pause):
+ """Pauses or resumes the sync of a DRBD device.
+
+ @param pause: Wether to pause or resume
+ @return: the success of the operation
+
+ """
+ if self.minor is None:
+ logging.info("Not attached during PauseSync")
+ return False
+
+ children_result = super(DRBD8, self).PauseResumeSync(pause)
+
+ if pause:
+ cmd = "pause-sync"
+ else:
+ cmd = "resume-sync"
+
+ result = utils.RunCmd(["drbdsetup", self.dev_path, cmd])
+ if result.failed:
+ logging.error("Can't %s: %s - %s", cmd,
+ result.fail_reason, result.output)
+ return not result.failed and children_result
+
def GetProcStatus(self):
"""Return device data from /proc.
--
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