[PATCH v7 5/5] Scripts to create and delete xen-scsiback nodes in Linux target framework

[Olaf Hering <olaf@aepfle.de>]

Just to make them public, not meant for merging:
The scripts used during development to create a bunch of SCSI devices in
dom0 using the Linux target framework. targetcli3 and rtslib3 is used.

A patch is required for python-rtslib:
http://article.gmane.org/gmane.linux.scsi.target.devel/8146

Signed-off-by: Olaf Hering <olaf@aepfle.de>
---
 tools/misc/Makefile                      |   4 +
 tools/misc/target-create-xen-scsiback.sh | 135 +++++++++++++++++++++++++++++++
 tools/misc/target-delete-xen-scsiback.sh |  41 ++++++++++
 3 files changed, 180 insertions(+)

diff --git a/tools/misc/Makefile b/tools/misc/Makefile
index a2ef0ec..180c9f5 100644
--- a/tools/misc/Makefile
+++ b/tools/misc/Makefile
@@ -35,6 +35,8 @@ INSTALL_SBIN += $(INSTALL_SBIN-y)
 
 # Everything to be installed in a private bin/
 INSTALL_PRIVBIN                += xenpvnetboot
+INSTALL_PRIVBIN                += target-create-xen-scsiback.sh
+INSTALL_PRIVBIN                += target-delete-xen-scsiback.sh
 
 # Everything to be installed
 TARGETS_ALL := $(INSTALL_BIN) $(INSTALL_SBIN) $(INSTALL_PRIVBIN)
@@ -45,6 +47,8 @@ TARGETS_COPY += xen-ringwatch
 TARGETS_COPY += xencons
 TARGETS_COPY += xencov_split
 TARGETS_COPY += xenpvnetboot
+TARGETS_COPY += target-create-xen-scsiback.sh
+TARGETS_COPY += target-delete-xen-scsiback.sh
 
 # Everything which needs to be built
 TARGETS_BUILD := $(filter-out $(TARGETS_COPY),$(TARGETS_ALL))
diff --git a/tools/misc/target-create-xen-scsiback.sh b/tools/misc/target-create-xen-scsiback.sh
new file mode 100755
index 0000000..96d4c39
--- /dev/null
+++ b/tools/misc/target-create-xen-scsiback.sh
@@ -0,0 +1,135 @@
+#!/usr/bin/env bash
+unset LANG
+unset ${!LC_*}
+set -x
+set -e
+
+modprobe --version
+targetcli --version
+udevadm --version
+blockdev --version
+parted --version
+sfdisk --version
+mkswap --version
+
+configfs=/sys/kernel/config
+target_path=$configfs/target
+
+num_luns=4
+num_hosts=4
+
+case "$1" in
+	-p)
+	backend="pvops"
+	;;
+	-x)
+	backend="xenlinux"
+	;;
+	*)
+	: "usage: $0 [-p|-x]"
+	if grep -qw xenfs$ /proc/filesystems
+	then
+		backend="pvops"
+	else
+		backend="xenlinux"
+	fi
+	;;
+esac
+
+get_wwn() {
+	sed '
+	s@-@@g
+	s@^\(.\{16\}\)\(.*\)@\1@
+	' /proc/sys/kernel/random/uuid
+}
+
+if test ! -d "${target_path}"
+then
+	modprobe -v configfs
+	mount -vt configfs configfs $configfs
+	modprobe -v target_core_mod
+fi
+if test "${backend}" = "pvops"
+then
+	modprobe -v xen-scsiback
+fi
+
+host=0
+while test $host -lt $num_hosts
+do
+	host=$(( $host + 1 ))
+	lun=0
+	loopback_wwn="naa.`get_wwn`"
+	pvscsi_wwn="naa.`get_wwn`"
+	targetcli /loopback create ${loopback_wwn}
+	if test "${backend}" = "pvops"
+	then
+		targetcli /xen-pvscsi create ${pvscsi_wwn}
+	fi
+	while test $lun -lt $num_luns
+	do
+		: h $host l $lun
+		f_file=/dev/shm/Fileio.${host}.${lun}.file
+		f_uuid=/dev/shm/Fileio.${host}.${lun}.uuid
+		f_link=/dev/shm/Fileio.${host}.${lun}.link
+		fileio_name="fio_${host}.${lun}"
+		pscsi_name="ps_${host}.${lun}"
+
+		targetcli /backstores/fileio create name=${fileio_name} "file_or_dev=${f_file}" size=$((1024*1024 * 8 )) sparse=true
+		targetcli /loopback/${loopback_wwn}/luns create /backstores/fileio/${fileio_name} $lun
+
+		udevadm settle --timeout=4
+
+		vpd_uuid="`sed -n '/^T10 VPD Unit Serial Number:/s@^[^:]\+:[[:blank:]]\+@@p' /sys/kernel/config/target/core/fileio_*/${fileio_name}/wwn/vpd_unit_serial`"
+		if test -z "${vpd_uuid}"
+		then
+			exit 1
+		fi
+		echo "${vpd_uuid}" > "${f_uuid}"
+		by_id="`echo ${vpd_uuid} | sed 's@-@@g;s@^\(.\{25\}\)\(.*\)@scsi-36001405\1@'`"
+		ln -sfvbn "/dev/disk/by-id/${by_id}" "${f_link}"
+
+		f_major=$((`stat --dereference --format=0x%t "${f_link}"`))
+		f_minor=$((`stat --dereference --format=0x%T "${f_link}"`))
+		if test -z "${f_major}" || test -z "${f_minor}"
+		then
+			exit 1
+		fi
+		f_alias=`ls -d /sys/dev/block/${f_major}:${f_minor}/device/scsi_device/*:*:*:*`
+		if test -z "${f_alias}"
+		then
+			exit 1
+		fi
+		f_alias=${f_alias##*/}
+
+		blockdev --rereadpt "${f_link}"
+		udevadm settle --timeout=4
+		echo 1,12,S | sfdisk "${f_link}"
+		udevadm settle --timeout=4
+		blockdev --rereadpt "${f_link}"
+		udevadm settle --timeout=4
+		parted -s "${f_link}" unit s print
+
+		d_link="`readlink \"${f_link}\"`"
+		if test -n "${d_link}"
+		then
+			p_link="${d_link}-part1"
+			ls -l "${p_link}"
+			mkswap -L "swp_${fileio_name}" "${p_link}"
+			udevadm settle --timeout=4
+			blockdev --rereadpt "${f_link}"
+			udevadm settle --timeout=4
+			parted -s "${f_link}" unit s print
+		fi
+
+		targetcli /backstores/pscsi create "dev=${f_link}" "${pscsi_name}"
+		if test "${backend}" = "pvops"
+		then
+			targetcli /xen-pvscsi/${pvscsi_wwn}/tpg1/luns create "/backstores/pscsi/${pscsi_name}" $lun
+			targetcli /xen-pvscsi/${pvscsi_wwn}/tpg1  set parameter alias=${f_alias%:*}
+		fi
+
+		lun=$(( $lun + 1 ))
+	done
+done
+
diff --git a/tools/misc/target-delete-xen-scsiback.sh b/tools/misc/target-delete-xen-scsiback.sh
new file mode 100755
index 0000000..5b6dc54
--- /dev/null
+++ b/tools/misc/target-delete-xen-scsiback.sh
@@ -0,0 +1,41 @@
+#!/usr/bin/env bash
+unset LANG
+unset ${!LC_*}
+set -x
+set -e
+
+targetcli --version
+
+configfs=/sys/kernel/config
+target_path=$configfs/target
+
+cd "${target_path}"
+if cd xen-pvscsi
+then
+	for wwn in `ls -d naa.*`
+	do
+		targetcli /xen-pvscsi delete $wwn
+	done
+fi
+cd "${target_path}"
+cd core
+for name in `ls -d pscsi_*/*/wwn`
+do
+	name=${name%/wwn}
+	name=${name##*/}
+	targetcli /backstores/pscsi delete $name
+done
+cd "${target_path}"
+cd loopback
+for wwn in `ls -d naa.*`
+do
+	targetcli /loopback delete $wwn
+done
+cd "${target_path}"
+cd core
+for name in `ls -d fileio_*/*/wwn`
+do
+	name=${name%/wwn}
+	name=${name##*/}
+	targetcli /backstores/fileio delete $name
+done