New FreeBSD boot floppy stuff using splitfs

rianren

转自： www.bsdforums.org News, Articles

FreeBSD's John Baldwin has committed some changes to overhaul boot floppy generation system so that it scales better and requires minimal care and feeding for future FreeBSD releases. For example, John has made changes to consolidate multitude of floppy related constants down to a normal FLOPPY set for 1.44 floppies and on PC98 a SMALLFLOPPY set for 1.2 floppies. He has also cleaned up the i386 arch section by not duplicating constants that are the same on both machine types (i386 and pc98). They feel that this should also end the bikeshed over floppy install support and sysinstall in future releases, which can now be stuffed with all sorts of extras.

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From: John Baldwin <jhb@FreeBSD.org>
To: John Baldwin <jhb@FreeBSD.org>, src-committers@FreeBSD.org,
cvs-src@FreeBSD.org, cvs-all@FreeBSD.org
Date: Mon, 26 Jan 2004 15:06:15 -0500
Subject: HEADSUP: New boot floppy stuff using splitfs (cvs commit:
src/release Makefile)

On Monday 26 January 2004 02:58 pm, John Baldwin wrote:
> jhb 2004/01/26 11:58:38 PST
>
> FreeBSD src repository
>
> Modified files:
> release Makefile
> Log:
> Overhaul our boot floppy generation system so that it scales better and
> requires minimal care and feeding for future releases.
> - Consolidate multitude of floppy related constants down to a normal
> FLOPPY set for 1.44 floppies and on PC98 a SMALLFLOPPY set for 1.2
> floppies. Also, cleanup the i386 arch section by not duplicating
> constants that are the same on both machine types (i386 and pc98).
> - Update the ZIPNSPLIT macro to generate a file chunks that will actually
> fit onto 1.44 floppies formatted with UFS1. Unfortunately, split(1)
> seems to be somewhat buggy, so the files generated are slightly larger
> than the argument passed to split.
> - Split the release.10 target into 3 targers: floppies.1, floppies.2 and
> floppies.3 that are added to EXTRAS only if NOFLOPPIES is defined.
> floppies.1 builds the install floppies, floppies.2 builds the fixit
> floppy, and floppies.3 generates the md5 sums and READMEs for the
> floppies/ directory.
> - Drop the by now largely obsolete and less useful boot.flp picture.
> This was more useful when the mfsroot lived inside the kernel rather than
> being loaded from a separate file by the loader.
> - Only build a single mfsroot containing no modules that is used for all
> installation methods.
> - Use split-file.sh to split up a gzipped GENERIC kernel into however
> many floppies it takes for the boot kernel. Currently, a stock 5.2 GENERIC
> kernel including WITNESS, INVARIANTS, DDB, and other assorted bloat fits
> onto 2 additional floppies besides the boot floppy with some room to spare.
> - If SPLIT_MFSROOT is defined, the mfsroot.gz file is similar split into
> however many floppies are needed. Currently it is not defined as the
> mfsroot.gz fits onto the current boot.flp with room to spare.
> - Add a 'makeFloppySet' target which builds a floppy set for a file that
> was split using split-file.sh.
> - Rename the doMFSKERN target to 'buildBootFloppy' as that more closely
> matches what it does now. We no longer build a custom BOOTMFS kernel
> for each boot floppy.
> - We no longer build a 2.88 boot.flp image to use with emulated CD
> booting. The non-emulated cdboot works for almost everyone who boots off of
> CD and if it doesn't work on a particular machine, the user can always boot
> from the 1.44 floppy images.
> - We no longer build a driver floppy or stick kernel modules in the
> mfsroot since we now use a stock kernel when booting from floppy.
>
> Revision Changes Path
> 1.835 +175 -179 src/release/Makefile

This should take care of the bikeshed over floppy install support in future
releases.

--
John Baldwin <jhb@FreeBSD.org> <>< http://www.FreeBSD.org/~jhb/
"ower Users Use the Power to Serve" = http://www.FreeBSD.org