From 7fd24086946f90347adc59a61beec621b555bdd7 Mon Sep 17 00:00:00 2001
From: cryx <cryx@h3q.com>
Date: Mon, 28 Dec 2009 22:09:17 +0000
Subject: Support for setting and using jail-bound ZFS datasets, cpuset(1) and
 setfib(1).

Jail-bound ZFS datasets still need the usual zfs+jail stuff like security.jail.mount_allowed=1 and security.jail.enforce_statfs=0 as well as "add path zfs unhide" in the devfs.rules for the jail.

The setfib utility requires FIBs to be enabled via kernel-config.

All features need at least FreeBSD 7.1-RELEASE.
---
 ezjail-admin | 116 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++---
 ezjail.sh    |  16 +++++++++
 2 files changed, 127 insertions(+), 5 deletions(-)

diff --git a/ezjail-admin b/ezjail-admin
index 1ba7fc9..b0fb6f8 100755
--- a/ezjail-admin
+++ b/ezjail-admin
@@ -46,7 +46,7 @@ ezjail_usage_install="Usage: ${ezjail_admin} install [-mMpPsS] [-h host] [-r rel
 ezjail_usage_create="Usage: ${ezjail_admin} create [-xbi] [-f flavour] [-r jailroot] [-s size] [-c bde|eli|zfs] [-C args] [-a archive] jailname jailip"
 ezjail_usage_delete="Usage: ${ezjail_admin} delete [-w] jailname"
 ezjail_usage_update="Usage: ${ezjail_admin} update [-s sourcetree] [-p] (-b|-i|-u|-P)"
-ezjail_usage_config="Usage: ${ezjail_admin} config [-r run|norun] [-n newname] [-i attach|detach|fsck] jailname"
+ezjail_usage_config="Usage: ${ezjail_admin} config [-r run|norun] [-n newname] [-c cpuset] [-z zfs-datasets] [-f fib] [-i attach|detach|fsck] jailname"
 ezjail_usage_console="Usage: ${ezjail_admin} console [-f] [-e command] jailname"
 ezjail_usage_archive="Usage: ${ezjail_admin} archive [-Af] [-a archive] [-d archivedir] jailname [jailname...]"
 ezjail_usage_restore="Usage: ${ezjail_admin} restore [-f] [-d archivedir] (archive|jailname)..."
@@ -170,6 +170,9 @@ fetchjailinfo () {
   eval ezjail_attachparams=\"\$jail_${ezjail_safename}_attachparams\"
   eval ezjail_attachblocking=\"\$jail_${ezjail_safename}_attachblocking\"
   eval ezjail_forceblocking=\"\$jail_${ezjail_safename}_forceblocking\"
+  eval ezjail_zfs_datasets=\"\$jail_${ezjail_safename}_zfs_datasets\"
+  eval ezjail_cpuset=\"\$jail_${ezjail_safename}_cpuset\"
+  eval ezjail_fib=\"\$jail_${ezjail_safename}_fib\"
 
   ezjail_softlink=${ezjail_jaildir}/`basename -- "${ezjail_rootdir}"`
   ezjail_devicelink="${ezjail_rootdir}.device"
@@ -615,6 +618,9 @@ create)
   echo export jail_${ezjail_safename}_attachparams=\"${ezjail_attachparams}\"
   echo export jail_${ezjail_safename}_attachblocking=\"${ezjail_attachblocking}\"
   echo export jail_${ezjail_safename}_forceblocking=\"${ezjail_forceblocking}\"
+  echo export jail_${ezjail_safename}_zfs_datasets=\"${ezjail_zfs_datasets}\"
+  echo export jail_${ezjail_safename}_cpuset=\"${ezjail_cpuset}\"
+  echo export jail_${ezjail_safename}_fib=\"${ezjail_fib}\"
   ) > "${ezjail_config}"
 
   # Final steps for flavour installation
@@ -1142,12 +1148,15 @@ restore)
 ######################## ezjail-admin CONFIG ########################
 config)
   # Clean variables, prevent polution
-  unset ezjail_setrunnable ezjail_imageaction ezjail_new_name
+  unset ezjail_setrunnable ezjail_imageaction ezjail_new_name ezjail_new_zfs_datasets ezjail_new_cpuset ezjail_new_fib
 
-  shift; while getopts :r:i:n: arg; do case ${arg} in
+  shift; while getopts :r:i:n:z:c:f: arg; do case ${arg} in
     i) ezjail_imageaction=${OPTARG};;
     r) ezjail_setrunnable=${OPTARG};;
     n) ezjail_new_name=${OPTARG};;
+    z) ezjail_new_zfs_datasets=${OPTARG};;
+    c) ezjail_new_cpuset=${OPTARG};;
+    f) ezjail_new_fib=${OPTARG};;
     ?) exerr ${ezjail_usage_config};;
   esac; done; shift $(( ${OPTIND} - 1 ))
 
@@ -1160,7 +1169,7 @@ config)
   [ "${ezjail_config}" ] || exerr "Error: Nothing known about jail ${ezjail_name}."
 
   # Nothing to be configured?
-  [ "${ezjail_setrunnable}" -o "${ezjail_new_name}" -o "${ezjail_imageaction}" ] || echo "Warning: No config option specified."
+  [ "${ezjail_setrunnable}" -o "${ezjail_new_name}" -o "${ezjail_imageaction}" -o "${ezjail_new_zfs_datasets}" -o "${ezjail_new_cpuset}" -o "${ezjail_new_fib}" ] || echo "Warning: No config option specified."
 
   # Do we want a new name for our jail?
   if [ "${ezjail_new_name}" ]; then
@@ -1190,12 +1199,15 @@ config)
     eval ezjail_new_attachblocking=\"\$jail_${ezjail_safename}_attachblocking\"
     eval ezjail_new_forceblocking=\"\$jail_${ezjail_safename}_forceblocking\"
     eval ezjail_new_imagetype=\"\$jail_${ezjail_safename}_imagetype\"
+    eval ezjail_new_zfs_datasets=\"\$jail_${ezjail_safename}_zfs_datasets\"
+    eval ezjail_new_cpuset=\"\$jail_${ezjail_safename}_cpuset\"
+    eval ezjail_new_fib=\"\$jail_${ezjail_safename}_fib\"
 
     # This scenario really will only lead to real troubles in the 'fulljail'
     # case, but I should still explain this to the user and not claim that
     # "an ezjail would already exist"
     case ${ezjail_new_hostname} in basejail|newjail|fulljail|flavours|ezjailtemp) exerr "Error: ezjail needs the ${ezjail_new_hostname} directory for its own administrative purposes.\n  Please chose another name.";; esac
-  
+
     # jail names may lead to identical configs, eg. foo.bar.com == foo-bar.com
     # so check, whether we might be running into problems
     [ -e "${ezjail_new_config}" -o -e "${ezjail_new_config}.norun" ] && exerr "Error: An ezjail config already exists at ${ezjail_new_config}.\n  Please chose another name."
@@ -1264,6 +1276,9 @@ config)
     echo export jail_${ezjail_new_safename}_attachparams=\"${ezjail_new_attachparams}\"
     echo export jail_${ezjail_new_safename}_attachblocking=\"${ezjail_new_attachblocking}\"
     echo export jail_${ezjail_new_safename}_forceblocking=\"${ezjail_new_forceblocking}\"
+    echo export jail_${ezjail_new_safename}_zfs_datasets=\"${ezjail_new_zfs_datasets}\"
+    echo export jail_${ezjail_new_safename}_cpuset=\"${ezjail_new_cpuset}\"
+    echo export jail_${ezjail_new_safename}_fib=\"${ezjail_new_fib}\"
     ) > "${ezjail_new_config}"
 
     # remove old config
@@ -1278,6 +1293,97 @@ config)
     fetchjailinfo ${ezjail_new_safename}
   fi
 
+  if [ "${ezjail_new_zfs_datasets}" ]; then
+    # if jail is still running, refuse to go any further
+    [ "${ezjail_id}" ] && exerr "Error: Jail appears to be still running.\n  '${ezjail_admin} stop ${ezjail_name}' it first ."
+
+    # write new config file, preserve comments
+    (
+    grep -e ^\# "${ezjail_config}"
+    echo
+    echo export jail_${ezjail_safename}_hostname=\"${ezjail_hostname}\"
+    echo export jail_${ezjail_safename}_ip=\"${ezjail_ip}\"
+    echo export jail_${ezjail_safename}_rootdir=\"${ezjail_rootdir}\"
+    echo export jail_${ezjail_safename}_exec=\"${ezjail_exec}\"
+    echo export jail_${ezjail_safename}_mount_enable=\"${ezjail_mount_enable}\"
+    echo export jail_${ezjail_safename}_devfs_enable=\"${ezjail_devfs_enable}\"
+    echo export jail_${ezjail_safename}_devfs_ruleset=\"${ezjail_devfs_ruleset}\"
+    echo export jail_${ezjail_safename}_procfs_enable=\"${ezjail_procfs_enable}\"
+    echo export jail_${ezjail_safename}_fdescfs_enable=\"${ezjail_fdescfs_enable}\"
+    echo export jail_${ezjail_safename}_image=\"${ezjail_image}\"
+    echo export jail_${ezjail_safename}_imagetype=\"${ezjail_imagetype}\"
+    echo export jail_${ezjail_safename}_attachparams=\"${ezjail_attachparams}\"
+    echo export jail_${ezjail_safename}_attachblocking=\"${ezjail_attachblocking}\"
+    echo export jail_${ezjail_safename}_forceblocking=\"${ezjail_forceblocking}\"
+    echo export jail_${ezjail_safename}_zfs_datasets=\"${ezjail_new_zfs_datasets}\"
+    echo export jail_${ezjail_safename}_cpuset=\"${ezjail_cpuset}\"
+    echo export jail_${ezjail_safename}_fib=\"${ezjail_fib}\"
+    ) > "${ezjail_config}_" 
+    mv "${ezjail_config}_" "${ezjail_config}"
+  fi
+
+  if [ "${ezjail_new_cpuset}" ]; then
+    # configure the new cpuset if the jail is currently running
+    [ "${ezjail_id}" ] && /usr/bin/cpuset -l ${ezjail_new_cpuset} -j ${ezjail_id} || exerr "Error: The defined cpuset is malformed"
+
+    # write new config file, preserve comments
+    (
+    grep -e ^\# "${ezjail_config}"
+    echo
+    echo export jail_${ezjail_safename}_hostname=\"${ezjail_hostname}\"
+    echo export jail_${ezjail_safename}_ip=\"${ezjail_ip}\"
+    echo export jail_${ezjail_safename}_rootdir=\"${ezjail_rootdir}\"
+    echo export jail_${ezjail_safename}_exec=\"${ezjail_exec}\"
+    echo export jail_${ezjail_safename}_mount_enable=\"${ezjail_mount_enable}\"
+    echo export jail_${ezjail_safename}_devfs_enable=\"${ezjail_devfs_enable}\"
+    echo export jail_${ezjail_safename}_devfs_ruleset=\"${ezjail_devfs_ruleset}\"
+    echo export jail_${ezjail_safename}_procfs_enable=\"${ezjail_procfs_enable}\"
+    echo export jail_${ezjail_safename}_fdescfs_enable=\"${ezjail_fdescfs_enable}\"
+    echo export jail_${ezjail_safename}_image=\"${ezjail_image}\"
+    echo export jail_${ezjail_safename}_imagetype=\"${ezjail_imagetype}\"
+    echo export jail_${ezjail_safename}_attachparams=\"${ezjail_attachparams}\"
+    echo export jail_${ezjail_safename}_attachblocking=\"${ezjail_attachblocking}\"
+    echo export jail_${ezjail_safename}_forceblocking=\"${ezjail_forceblocking}\"
+    echo export jail_${ezjail_safename}_zfs_datasets=\"${ezjail_zfs_datasets}\"
+    echo export jail_${ezjail_safename}_cpuset=\"${ezjail_new_cpuset}\"
+    echo export jail_${ezjail_safename}_fib=\"${ezjail_fib}\"
+    ) > "${ezjail_config}_"
+    mv "${ezjail_config}_" "${ezjail_config}"
+
+  fi
+
+  if [ "${ezjail_new_fib}" ]; then
+    # if jail is still running, refuse to go any further
+    [ "${ezjail_id}" ] && exerr "Error: Jail appears to be still running.\n  '${ezjail_admin} stop ${ezjail_name}' it first ."
+    [ "${ezjail_new_fib}" -ge "0" ] && exerr "Error: fib number has to be an integer."
+
+    # write new config file, preserve comments
+    (
+    grep -e ^\# "${ezjail_config}"
+    echo
+    echo export jail_${ezjail_safename}_hostname=\"${ezjail_hostname}\"
+    echo export jail_${ezjail_safename}_ip=\"${ezjail_ip}\"
+    echo export jail_${ezjail_safename}_rootdir=\"${ezjail_rootdir}\"
+    echo export jail_${ezjail_safename}_exec=\"${ezjail_exec}\"
+    echo export jail_${ezjail_safename}_mount_enable=\"${ezjail_mount_enable}\"
+    echo export jail_${ezjail_safename}_devfs_enable=\"${ezjail_devfs_enable}\"
+    echo export jail_${ezjail_safename}_devfs_ruleset=\"${ezjail_devfs_ruleset}\"
+    echo export jail_${ezjail_safename}_procfs_enable=\"${ezjail_procfs_enable}\"
+    echo export jail_${ezjail_safename}_fdescfs_enable=\"${ezjail_fdescfs_enable}\"
+    echo export jail_${ezjail_safename}_image=\"${ezjail_image}\"
+    echo export jail_${ezjail_safename}_imagetype=\"${ezjail_imagetype}\"
+    echo export jail_${ezjail_safename}_attachparams=\"${ezjail_attachparams}\"
+    echo export jail_${ezjail_safename}_attachblocking=\"${ezjail_attachblocking}\"
+    echo export jail_${ezjail_safename}_forceblocking=\"${ezjail_forceblocking}\"
+    echo export jail_${ezjail_safename}_zfs_datasets=\"${ezjail_zfs_datasets}\"
+    echo export jail_${ezjail_safename}_cpuset=\"${ezjail_cpuset}\"
+    echo export jail_${ezjail_safename}_fib=\"${ezjail_new_fib}\"
+    ) > "${ezjail_config}_"
+    mv "${ezjail_config}_" "${ezjail_config}"
+
+  fi
+
+
   case "${ezjail_setrunnable}" in
     run)   [ "${ezjail_config}" = "${ezjail_config%.norun}" ] || mv "${ezjail_config}" "${ezjail_config%.norun}";;
     norun) [ "${ezjail_config}" = "${ezjail_config%.norun}" ] && mv "${ezjail_config}" "${ezjail_config}.norun" ;;
diff --git a/ezjail.sh b/ezjail.sh
index 6df6358..eb5e251 100755
--- a/ezjail.sh
+++ b/ezjail.sh
@@ -65,6 +65,8 @@ do_cmd()
     eval ezjail_attachparams=\"\$jail_${ezjail}_attachparams\"
     eval ezjail_attachblocking=\"\$jail_${ezjail}_attachblocking\"
     eval ezjail_forceblocking=\"\$jail_${ezjail}_forceblocking\"
+    eval ezjail_zfs_datasets=\"\$jail_${ezjail}_zfs_datasets\"
+    eval ezjail_cpuset=\"\$jail_${ezjail}_cpuset\"
 
     # Do we still have a root to run in?
     [ ! -d "${ezjail_rootdir}" ] && echo " Warning: root directory ${ezjail_rootdir} of ${ezjail} does not exist." && continue
@@ -88,6 +90,20 @@ do_cmd()
   # Pass control to jail script which does the actual work
   [ "${ezjail_pass}" ] && sh /etc/rc.d/jail one${action%crypto} ${ezjail_pass}
 
+  if [ "${action}" = "start" ]; then
+    ezjail_safename=`echo -n "${ezjail}" | tr -c '[:alnum:]' _`
+    # Get the JID of the jail
+    [ -f "/var/run/jail_${ezjail_safename}.id" ] && ezjail_id=`cat /var/run/jail_${ezjail_safename}.id` || return
+
+    # Attach ZFS-datasets to the jail
+    for zfs in ${ezjail_zfs_datasets}; do
+      /sbin/zfs jail ${ezjail_id} ${zfs} ||Êecho -n "Error: ${zfs} could not be configured"
+    done
+
+    # Configure processor sets for the jail via cpuset(1)
+    [ "${ezjail_cpuset}" ] && /usr/bin/cpuset -l ${ezjail_cpuset} -j ${ezjail_id} || echo -n "Error: The defined cpuset is malformed"
+  fi
+
   # Can only detach after unmounting (from fstab.JAILNAME in /etc/rc.d/jail)
   attach_detach_post
 }
-- 
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