src/lib/libbe/be_impl.h, branch releng/14.0

Remove $FreeBSD$: two-line .h pattern

2023-08-16T17:54:16+00:00

Remove /^\s*\*\n \*\s+\$FreeBSD\$$\n/

spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSD

2023-05-12T16:44:03+00:00

The SPDX folks have obsoleted the BSD-2-Clause-FreeBSD identifier. Catch
up to that fact and revert to their recommended match of BSD-2-Clause.

Discussed with:		pfg
MFC After:		3 days
Sponsored by:		Netflix

loader: zfs should support bootonce an nextboot

2020-09-21T09:01:10+00:00

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

Drop "All Rights Reserved" from all libbe/bectl files

2020-01-24T02:18:09+00:00

I sent out an e-mail on 2020/01/21 with a plan to do this to Kyle, Rob, and
Wes; all parties have responded in the affirmative that it's OK to drop it
from these files.

libbe(3): allow creation of arbitrary depth boot environments

2019-04-22T13:43:38+00:00

libbe currently only provides an API to create a recursive boot environment,
without any formal support for intentionally limiting the depth. This
changeset adds an API, be_create_depth, that may be used to arbitrarily
restrict the depth of the new BE.

Submitted by:	Rob Fairbanks 
MFC after:	1 week
Differential Revision:	https://reviews.freebsd.org/D18564

libbe(3): move altroot augmentation bits around a little bit

2019-01-09T22:31:10+00:00

We could perhaps have a method that does this given a dataset, but it's yet
clear that we'll always want to bypass the altroot when we grab the
mountpoint. For now, we'll refactor things a bit so we grab the altroot
length when libbe is initialized and have a common method that does the
necessary augmentation (replace with / if it's the root, return a pointer to
later in the string if not).

This will be used in some upcoming work to make be_mount work properly for
deep BEs.

MFC after:	1 week

libbe(3): Properly account for altroot when creating new BEs

2018-11-19T02:16:20+00:00

Previously we would blindly copy the 'mountpoint' property, which includes
the altroot. The altroot needs to be snipped off prior to setting it on the
new BE, though, or you'll end up with a new BE and a mountpoint of /mnt with
altroot=/mnt

MFC after:	3 days

libbe(3)/bectl(8): Hit rewind on a bunch of off-by-ones

2018-08-16T17:56:03+00:00

While here, use sizeof() in some places that it makes sense to reduce room
for error and prefer strlcpy to strncpy

libbe(3): Fix leaky faucets

2018-08-14T18:11:06+00:00

Amongst them:
- Resource leaks
- Logically dead code
- Unused values
- Null termination issues

Reported by:	asomers (pointer to Coverity), Coverity
CID:		1394777, 1394791, 1394830, 1394844, 1394872, 1394894,
CID:		1394900, 1394907, 1394950, 1394965

libbe(3)/bectl(8): Standardize $FreeBSD$ IDs

2018-08-07T14:02:41+00:00