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Add notes about FFS and extended attributes.

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martin 2022-12-16 16:58:14 +00:00
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@ -1,4 +1,4 @@
.\" $NetBSD: main,v 1.569 2022/04/01 21:53:35 andvar Exp $
.\" $NetBSD: main,v 1.570 2022/12/16 16:58:14 martin Exp $
.\"
.\" Copyright (c) 1999-2012 The NetBSD Foundation, Inc.
.\" All rights reserved.
@ -526,6 +526,32 @@ development, and no formal or informal testing may have been done for
this snapshot (yet).
.Pp
.\} \" !\n[RELEASE_BRANCH] \{
One important new feature in this release is the support for extended
attributes and access controll lists on FFS file systems.
.Pp
For new installations the installer will default to disable this features,
so the file system is compatible with older
.Nx
releases (before 10), and allow other operating systems to mount this
file systems at least in read-only mode.
.Pp
If you want a new installed file system to support extended attributes,
change the file system type from
.Dq FFSv2
to
.Dq FFSv2ea
in the partitioning menu.
You can also convert file systems later, using the
.Xr fsck_ffs 8
utility.
More details are available in
.Lk https://wiki.netbsd.org/tutorials/acls_and_extended_attributes_on_ffs "this guide" .
.Pp
If you are upgrading from a version of
.Nx -current
please also check the
.Sx "Compatibility Issues With Previous NetBSD Releases" .
.PP
It is impossible to completely summarize the massive development that
went into the
.Nx
@ -785,6 +811,20 @@ and thus all issues that are fixed by
.Ic postinstall
by default will be handled.
.Pp
If you have ever run a version of
.Nx -current
between April 18, 2020 and September 23, 2022 (the version numbers
used in the affected time range are between 9.99.56 and 9.99.106)
your FFS file systems might have broken extended attributes stored.
.Pp
You should follow this
.Lk https://wiki.netbsd.org/features/UFS2ea/ guide
before booting the updated system multi-user for the first time.
.Pp
.Em Note that you do not need to do anything special if you never did run any affected kernel,
especially if you have never run
.Nx -current .
.Pp
A number of things have been removed from the
.Nx
\*V release.