HardenedBSD/stand/efi
Toomas Soome e307eb94ae loader: zfs should support bootonce an nextboot
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
2020-09-21 09:01:10 +00:00
..
boot1 loader: zfs should support bootonce an nextboot 2020-09-21 09:01:10 +00:00
fdt stand: refactor overlay loading a little bit 2019-04-11 13:26:28 +00:00
gptboot Only set WARNS if not defined 2020-09-11 13:28:37 +00:00
include RISC-V boot1.efi and loader.efi support 2020-07-06 18:19:42 +00:00
libefi stand/efihttp: Work around a bug in edk2 http instance reconfiguration 2020-09-09 16:35:51 +00:00
loader loader: zfs should support bootonce an nextboot 2020-09-21 09:01:10 +00:00
loader_4th
loader_lua
loader_simp
Makefile Remove tests for obsolete compilers in the build system 2020-05-12 15:22:40 +00:00
Makefile.inc