#!/bin/ksh
#*******************************************************************************
#
# NAME:		add_disk
# SUMMARY:	%description%
# COMPONENT:	solsysd
# VERSION:	rm6_14
# UPDATE DATE:	%date_modified: Mon Jun  2 10:38:33 1997 %
# PROGRAMMER:	%created_by:    rjantz %
# 
#		Copyright 1997 by Symbios Logic Inc.
#
# DESCRIPTION:
# add_disk carries out those operations needed for SYMplicity storage manager
# to be able to see a logical unit (or units).  The LUNs may have not been
# seen previously for various reasons, e.g., the LUN may have just been
# created, or a controller may have just been brought online.
#
# NOTES:
#
# REFERENCE:
#
# CODING STANDARD WAIVERS:
#
#*******************************************************************************

#*******************************************************************************
# PROCEDURE:	MutexAcquire
# SUMMARY:	get exclusive ownership of mutex file
#
# DESCRIPTION:
# MutexAcquire will try repeatedly to acquire a "mutex file" - success means
# the thread has been admitted to a "critical region"
#
# SYNTAX:
# MutexAcquire <mutex file>
# <mutex file> - name of the mutex guarding the critical region
#
# NOTES:
# MutexAcquire and the program it calls, rm_mutex_acquire, rely on O_CREAT
# semantics
#
# RETURNS:
# Nothing

MutexAcquire()
{
	while true
	do
		$RM_HOME/bin/rm_mutex_acquire $1
		if [ $? = 0 ]
		then
			break;
		fi
		sleep 1
	done;
}

#*******************************************************************************
# PROCEDURE:	MutexRelease
# SUMMARY:	relenquish mutex file ownership
#
# DESCRIPTION:
# MutexRelease releases mutex file ownership, so another thread can enter the
# critical region
#
# SYNTAX:
# MutexRelease <mutex file>
# <mutex file> - name of the mutex guarding the critical region
#
# NOTES:
#
# RETURNS:
# Nothing

MutexRelease()
{
	/bin/rm $1;
}

#*******************************************************************************
# PROCEDURE:	add_disk (main)
# SUMMARY:	Make RAID logical units visible
#
# DESCRIPTION:
# add_disk calls symdisks (which in turn runs "drvconfig" and "disks")
# to make previously unseen RAID logical units visible to SYMsm and Solaris.
#
# SYNTAX:
# add_disk
#
# NOTES:
#
# RETURNS:
# 0     - success
# non-0 - failure (currently not returned)


# A D D _ D I S K   M A I N   P R O C E D U R E
#
RMPARAMS_FILE=/etc/raid/rmparams
RM_HOME=`grep -v "^#" $RMPARAMS_FILE | grep System_RmHomeDirectory | cut -d= -f2`
RM_BOOT_HOME=`grep -v "^#" $RMPARAMS_FILE | grep System_RmBootHomeDirectory | cut -d= -f2`
SYMDISKS=$RM_BOOT_HOME/symdisks
ADD_RDAC=$RM_HOME/bin/add_rdac

RMDEVROOT=`grep -v "^#" $RMPARAMS_FILE | grep "System_AltDevDirRoot" | cut -d= -f2 | awk -F/ '{ ORS = "/"; for (i = NF; i > 1; --i) print $i; ORS = "\n"; print $1 }' | cut -d"/" -f3-32 |  awk -F/ '{ ORS = "/"; for (i = NF; i > 1; --i) print $i; ORS = "\n"; print $1 }'`

_INIT_RECONFIG=YES; export _INIT_RECONFIG

MutexAcquire /tmp/mutex.add_disk	# Begin critical region

if [ -n "$1" ]
then
	if [ ! -c $RMDEVROOT/dev/rdsk/$1 ]
	then
		$SYMDISKS -r $RMDEVROOT -d sd >/dev/null 2>&1
	fi
else
	$SYMDISKS -r $RMDEVROOT -d sd >/dev/null 2>&1
fi
$ADD_RDAC

MutexRelease /tmp/mutex.add_disk	# End of critical region

exit 0