If the following packages have not yet been installed, install these now:
bzip2 gcc kernel-devel or kernel-default-devel kernel-modules-extra (only on Fedora) libelf-dev, libelf-devel or elfutils-libelf-devel libperl-dev or perl-devel make perl perl-Data-Dumper perl-ExtUtils-MakeMaker (not needed on Debian systems) rpm-build (only on RPM-based systems) tar
The next step is to build and install SCST. How to do that depends on whether or not your Linux distribution supports a package manager:
make release
if rpm -q glibc >/dev/null 2>&1; then
rm -rf {,scstadmin/}rpmbuilddir
make rpm
sudo rpm -U $PWD/{,scstadmin/}rpmbuilddir/RPMS/*/*.rpm
elif dpkg-query -s libc-bin >/dev/null 2>&1; then
sudo apt install build-essential debhelper devscripts gcc make lintian quilt
sudo apt install linux-headers-$(uname -r) || sudo apt install pve-headers-$(uname -r)
make dpkg
sudo dpkg -i $PWD/dpkg/{scst,iscsi-scst,scstadmin}_*.deb
else
make 2release
BUILD_2X_MODULE=y CONFIG_SCSI_QLA_FC=y CONFIG_SCSI_QLA2XXX_TARGET=y make all
sudo BUILD_2X_MODULE=y CONFIG_SCSI_QLA_FC=y CONFIG_SCSI_QLA2XXX_TARGET=y make -C "$PWD" install
fi
Since the above step installs several kernel modules into directory /lib/modules/$(uname -r), that step has to be repeated every time a new kernel or a kernel update has been installed. If you want to avoid this, install the scst-dkms package instead of the scst package.
For example, if you want to have dkms support for your SCST rpm install, then you would use the following command to make your SCST packages:
make rpm-dkms
or
make scst-dkms-rpm
make rpm-dkms also builds scstadmin packages in addition to the SCST dkms packages. Both make commands will create rpm packages that will cause SCST to be automatically rebuilt and installed every time a new kernel version is installed and booted for which the SCST kernel modules had not yet been built so that SCST rpm packages will not need to be rebuilt after each kernel update.
The easiest way to configure SCST is to create a configuration file /etc/scst.conf and by using scstadmin to load that configuration file. The /etc/init.d/scst script uses scstadmin to load the /etc/scst.conf file. The following information is present in /etc/scst.conf:
For more information about scst.conf, see also scstadmin/scstadmin.sysfs/man5/scst.conf.5.
Loading the SCST kernel modules and applying the /etc/scst.conf configuration file is possible as follows:
/etc/init.d/scst restart
After SCST has been loaded, configuration changes can be applied without unloading and reloading the SCST kernel modules:
scstadmin -config /etc/scst.conf
After the SCST configuration has been changed via scstadmin or by modifying the SCST sysfs attributes, the new configuration can be saved e.g. as follows:
scstadmin -write_config /etc/scst.conf.new
More information about the device handler and target driver sysfs attributes can be found in the scst/README document. More detailed instructions about iSCSI, QLogic FC, SRP and FCoE configuration can be found in the following documents: