RHEL5 - scsi_reserve: add restart option

RHEL5 - scsi_reserve: add restart option

[Ryan O'Hara]

Gitweb:        http://git.fedorahosted.org/git/cluster.git?p=cluster.git;a=commitdiff;h=4030e990049b43a125a083ed994629c6c8409e0c
Commit:        4030e990049b43a125a083ed994629c6c8409e0c
Parent:        a37692ca2e979b71012653676141d807a307a217
Author:        rohara <rohara@spartan.(none)>
AuthorDate:    Fri Sep 5 16:34:51 2008 -0500
Committer:     rohara <rohara@spartan.(none)>
CommitterDate: Fri Sep 5 16:34:51 2008 -0500

scsi_reserve: add restart option

Added restart option to scsi_reserve init script. Using this option
will result is re-registering with all devices. It will not remove
any existing registrations, since doing so would be dangerous. In
short, it is nearly identical to calling the script with the "start"
option. (BZ #455330)
---
 fence/agents/scsi/scsi_reserve |   55 ++++++++++++++++++++++++++++++++++++++++
 1 files changed, 55 insertions(+), 0 deletions(-)

diff --git a/fence/agents/scsi/scsi_reserve b/fence/agents/scsi/scsi_reserve
index 67c0d2d..34f25e5 100755
--- a/fence/agents/scsi/scsi_reserve
+++ b/fence/agents/scsi/scsi_reserve
@@ -219,6 +219,61 @@ case $1 in
 
 	;; # end of stop
 
+    restart)
+
+	error=0
+
+	echo -n "Retarting scsi_reserve:"
+
+	for dev in $scsi_devices
+	do
+	  # recreate the scsi registration
+	  #
+	  if ! sg_persist -n -d $dev -o -I -S $key &> /dev/null ; then
+	      logger -t scsi_reserve \
+		"[error] unable to register device $dev (key=0x$key)"
+	      : $[ count = $count + 1 ]
+	      error=1
+	  else
+	      logger -t scsi_reserve \
+		"[info] registered with device $dev (key=0x$key)"
+	  fi
+
+	  # check to see if reservation already exists
+	  #
+	  if sg_persist -n -d $dev -i -r | grep -qiE "^[[:space:]]*Key=0x" ; then
+	      logger -t scsi_reserve \
+		"[info] reservation already exists on $dev"
+	      continue
+	  fi
+
+	  # recreate the scsi reservation
+	  #
+	  if ! sg_persist -n -d $dev -o -R -K $key -T 5 &> /dev/null ; then
+	      logger -t scsi_reserver \
+		"[error] unable to create reservation on $dev (key=0x$key)"
+	      : $[ count = $count + 1 ]
+	      error=1
+	  fi
+	done
+
+	# leave fence domain if any errors occured during registration
+	#
+	if [ $error -eq 0 ] ; then
+	    success
+	else
+	    logger -t scsi_reserve \
+		"[info] $count errors during registration"
+	    logger -t scsi_reserve \
+		"[info] leaving the fence domain"
+	    fence_tool leave
+	    failure
+	fi
+
+	echo
+
+	;; # end of restart
+
     status)
 
 	error=0