Re: [PATCH v5 5/5] Scripts to create and delete xen-scsiback nodes in Linux target framework

[Ian Campbell <ian.campbell@citrix.com>]

On Wed, 2015-05-06 at 13:28 +0000, Olaf Hering wrote:
> 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.


I'm not sure what this is all about, but is there anything end-user-ish
which ought to be documented or put on the wiki or something?


> 
> 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 ccd36af..be101d8 100644
> --- a/tools/misc/Makefile
> +++ b/tools/misc/Makefile
> @@ -32,6 +32,8 @@ 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)
> @@ -42,6 +44,8 @@ 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
> 
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