Date: Fri, 15 May 2026 07:59:15 -0700 From: Mark Millard <marklmi@yahoo.com> To: Colin Percival <cperciva@freebsd.org>, Alexey Dokuchaev <danfe@freebsd.org> Cc: dev-commits-src-all@freebsd.org, dev-commits-src-branches@freebsd.org Subject: Re: git: 01d5910b8766 - stable/15 - pkg-stage.sh: Add ext2 and ntfs Message-ID: <896706d9-d149-4b3a-8f25-596c9cd5f3ac@yahoo.com> In-Reply-To: <3fda2a13-fdde-42bb-8c18-a9482b7ee321@yahoo.com> References: <6a061a2c.25c2f.7465fc96@gitrepo.freebsd.org> <agaU-uSr2EzjC1-M@FreeBSD.org> <b1249511-d2e6-4900-9281-4b113c4fcc5e@freebsd.org> <3fda2a13-fdde-42bb-8c18-a9482b7ee321@yahoo.com>
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On 5/15/26 07:43, Mark Millard wrote: > On 5/14/26 23:24, Colin Percival wrote: >> On 5/14/26 20:37, Alexey Dokuchaev wrote: >>> On Thu, May 14, 2026 at 06:53:32PM +0000, Colin Percival wrote: >>>> commit 01d5910b8766671afdbd9e274fd62b397aca9e1a >>>> >>>> pkg-stage.sh: Add ext2 and ntfs >>>> >>>> Having these packages available on release media may help users who >>>> need to sneakernet other packages (e.g. firmware) from systems >>>> running >>>> Linux or Windows. >>> >>> FreeBSD supports extfs (rw) natively, what's the need for FUSE-ext2? >> >> The "ext2" fusefs port also handles ext3 and ext4. Poorly named port, I >> suppose... >> > > https://wiki.freebsd.org/Ext2fs reports about ext2fs.ko : > > QUOTE > This page serves to keep some notes related to FreeBSD's kernel > implementation that supports the original ext2 and sufficient features > to support newer versions of the popular filesystem. > . . . > In FreeBSD ext2, ext3 and ext4 are not different filesystems: ext2 is > the base filesystem and some features from ext3 and ext4 are supported. > All features in FreeBSD's implementation follow UFS semantics and this > can sometimes impose important differences. > > All supported FreeBSD versions support ext2/3/4 read and write with most > of the features, except for journaling. > FreeBSD 13-current supports Big Endian Platforms, including PowerPC, > through byteswapping. > FreeBSD 12.1 and later have support for DTrace to enable debugging in > production. > FreeBSD 12+ includes initial support for writing ext4 filesystems > (thanks to Fedor Uporov). > FreeBSD 10.1-12 used by default reallocblk. This comes from UFS and > helps preventing defragmentation issues. Linux doesn't have an exact > equivalent but Ext4 does delayed allocation which is similar in concept. > In freeBSD 12 the feature was disabled by default as it proved to be > unstable. > FreeBSD 9.x+ fully supports the async mode, which is the default on > Linux. Unlike Linux, the default is to use the sync mode which will make > your filesystem more reliable at the cost of some performance. > . . . > Known issues > > We don't support the inline_data feature: it is doable, just no one has > done it. > We support Extended Attributes, but we don't have the calls to support > ACLs in a similar way to other BSD filesystems (namely UFS). > We lack support for journaling which is inconvenient but is not > necessarily a problem if you are OK with running in sync mode. > Furthermore, at least in the Linux implementation, journaling is known > to reduce performance. > We don't support the SSD trim command: the code to merge this feature > from UFS is relatively simple but while on Linux this is a mount option, > in FreeBSD's UFS this is set in tunefs. For convenience we always choose > to keep the same semantics as in UFS, so it's unsupported (for now). > Starting from ext2fsprogs v1.43, Linux distributions are activated the > 64 bit feature even when partitions are smaller than 16T. This feature > caused problems for some Linux bootloaders and utilities. This is > supported in FreeBSD as of FreeBSD 12+. > END QUOTE > > (Not mentioned is lack of encryption, if other things I read are correct.) > > > It looks like: https://forums.ghostbsd.org/d/694-hi-new-here-and-to-bsd documents more detailed tradeoffs between FreeBSD's ext2fs and fuse-ext2, as of early this year. I've not found such for sysutils/fusefs-lkl for ext4. -- === Mark Millard marklmi at yahoo.comhome | help
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