e307eb94ae
bootonce feature is temporary, one time boot, activated by "bectl activate -t BE", "bectl activate -T BE" will reset the bootonce flag. By default, the bootonce setting is reset on attempt to boot and the next boot will use previously active BE. By setting zfs_bootonce_activate="YES" in rc.conf, the bootonce BE will be set permanently active. bootonce dataset name is recorded in boot pool labels, bootenv area. in case of nextboot, the nextboot_enable boolean variable is recorded in freebsd:nvstore nvlist, also stored in boot pool label bootenv area. On boot, the loader will process /boot/nextboot.conf if nextboot_enable is "YES", and will set nextboot_enable to "NO", preventing /boot/nextboot.conf processing on next boot. bootonce and nextboot features are usable in both UEFI and BIOS boot. To use bootonce/nextboot features, the boot loader needs to be updated on disk; if loader.efi is stored on ESP, then ESP needs to be updated and for BIOS boot, stage2 (zfsboot or gptzfsboot) needs to be updated (gpart or other tools). At this time, only lua loader is updated. Sponsored by: Netflix, Klara Inc. Differential Revision: https://reviews.freebsd.org/D25512
90 lines
1.7 KiB
Bash
Executable File
90 lines
1.7 KiB
Bash
Executable File
#!/bin/sh
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#
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# $FreeBSD$
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#
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# PROVIDE: zfsbe
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# REQUIRE: mountcritlocal
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# Handle boot environment subordinate filesystems
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# that may have canmount property set to noauto.
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# For these filesystems mountpoint relative to /
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# must be the same as their dataset name relative
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# to BE root dataset.
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. /etc/rc.subr
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name="zfsbe"
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rcvar="zfs_enable"
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start_cmd="be_start"
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stop_cmd="be_stop"
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required_modules="zfs"
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mount_subordinate()
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{
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local _be
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_be=$1
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zfs list -rH -o mountpoint,name,canmount,mounted -s mountpoint -t filesystem $_be | \
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while read _mp _name _canmount _mounted ; do
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# skip filesystems that must not be mounted
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[ "$_canmount" = "off" ] && continue
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# skip filesystems that are already mounted
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[ "$_mounted" = "yes" ] && continue
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case "$_mp" in
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"none" | "legacy" | "/" | "/$_be")
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# do nothing for filesystems with unset or legacy mountpoint
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# or those that would be mounted over /
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;;
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"/$_be/"*)
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# filesystems with mountpoint relative to BE
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mount -t zfs $_name ${_mp#/$_be}
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;;
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*)
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# filesystems with mountpoint elsewhere
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zfs mount $_name
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;;
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esac
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done
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}
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activate_bootonce()
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{
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local _dev
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local _bootonce
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local _be
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_dev=$1
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_be=${_dev##*/}
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_bootonce="`kenv -q zfs-bootonce`"
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if [ "$_bootonce" = "zfs:${_dev}:" ] ; then
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bectl activate $_be
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fi
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}
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be_start()
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{
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if [ `$SYSCTL_N security.jail.jailed` -eq 1 ]; then
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:
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else
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mount -p | while read _dev _mp _type _rest; do
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[ $_mp = "/" ] || continue
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if [ $_type = "zfs" ] ; then
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mount_subordinate $_dev
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if checkyesno zfs_bootonce_activate; then
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activate_bootonce $_dev
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fi
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fi
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break
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done
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fi
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}
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be_stop()
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{
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}
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load_rc_config $name
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run_rc_command "$1"
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