libexec/rc/rc.d/zfsbe

   1 #!/bin/sh
   2 #
   3 # $FreeBSD$
   4 #
   5
   6 # PROVIDE: zfsbe
   7 # REQUIRE: mountcritlocal
   8
   9 # Handle boot environment subordinate filesystems
  10 # that may have canmount property set to noauto.
  11 # For these filesystems mountpoint relative to /
  12 # must be the same as their dataset name relative
  13 # to BE root dataset.
  14
  15 . /etc/rc.subr
  16
  17 name="zfsbe"
  18 rcvar="zfs_enable"
  19 start_cmd="be_start"
  20 stop_cmd="be_stop"
  21 required_modules="zfs"
  22
  23 mount_subordinate()
  24 {
  25         local _be
  26
  27         _be=$1
  28         zfs list -rH -o mountpoint,name,canmount,mounted -s mountpoint -t filesystem $_be | \
  29         while read _mp _name _canmount _mounted ; do
  30                 # skip filesystems that must not be mounted
  31                 [ "$_canmount" = "off" ] && continue
  32                 # skip filesystems that are already mounted
  33                 [ "$_mounted" = "yes" ] && continue
  34                 case "$_mp" in
  35                 "none" | "legacy" | "/" | "/$_be")
  36                         # do nothing for filesystems with unset or legacy mountpoint
  37                         # or those that would be mounted over /
  38                         ;;
  39                 "/$_be/"*)
  40                         # filesystems with mountpoint relative to BE
  41                         mount -t zfs $_name ${_mp#/$_be}
  42                         ;;
  43                 *)
  44                         # filesystems with mountpoint elsewhere
  45                         zfs mount $_name
  46                         ;;
  47                 esac
  48         done
  49 }
  50
  51 activate_bootonce()
  52 {
  53         local _dev
  54         local _bootonce
  55         local _be
  56
  57         _dev=$1
  58         _be=${_dev##*/}
  59
  60         _bootonce="`kenv -q zfs-bootonce`"
  61         if [ "$_bootonce" = "zfs:${_dev}:" ] ; then
  62                 bectl activate $_be
  63         fi
  64 }
  65
  66 be_start()
  67 {
  68         if [ `$SYSCTL_N security.jail.jailed` -eq 1 ]; then
  69                 :
  70         else
  71                 mount -p | while read _dev _mp _type _rest; do
  72                         [ $_mp  = "/" ] || continue
  73                         if [ $_type = "zfs" ] ; then
  74                                 mount_subordinate $_dev
  75                                 if checkyesno zfs_bootonce_activate; then
  76                                         activate_bootonce $_dev
  77                                 fi
  78                         fi
  79                         break
  80                 done
  81         fi
  82 }
  83
  84 be_stop()
  85 {
  86 }
  87
  88 load_rc_config $name
  89 run_rc_command "$1"