Date: Sun, 19 Jan 2003 16:03:44 +0100 From: Poul-Henning Kamp <phk@critter.freebsd.dk> To: current@freebsd.org Subject: HEADSUP: CCD(4) hackery... Message-ID: <8694.1042988624@critter.freebsd.dk>
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------- Forwarded Message
From: Poul-Henning Kamp <phk@FreeBSD.org>
Date: Sun, 19 Jan 2003 07:00:58 -0800 (PST)
To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org
phk 2003/01/19 07:00:58 PST
Modified files:
sys/sys ccdvar.h
sys/dev/ccd ccd.c
Log:
Finally give CCD the disk mini-layer treatment:
CAUTION:
Previously CCD would be different from all other disks in
the system in that there were no "ccd0" device, only a
"ccd0c" device.
This is no longer so after this commit. If you access a
ccd device through the "/dev/ccd0c" device _and_ have not
actually put a BSD disklabel on the device, you will have
to use the name "/dev/ccd0". If your CCD device contains
a BSD disklabel there should be no difference.
You need to recompile ccdconfig(8) using the changed
src/sys/sys/ccdvar.h for the -g "show me" option to work.
I have run the regression test I created before I started
overhauling CCD and it flags no problems, but this code
is mildly evil, so take care. If you would cry if you lost
what's on CCD, make a back before you upgrade.
Create separate cdevsw for the /dev/ccd.ctl device.
Remove the cloning function, the disk-minilayer will do all naming
for us.
Remove the ccdunit and ccdpart functions and carry the softc pointer
in the relevant dev_t's and structures.
Release all memory when a CCD device is unconfigured, previously
the softc would linger behind.
Remove all traces of BSD disklabel fiddling code.
Remove ccdpsize, the disk mini-layer does this for us.
Don't allocate memory with M_WAITOK in ccdstrategy().
Remove boundary checks which the disk mini-layer does for us.
Don't allocate space for more than 2 ccdbuf, RAID was never implemented.
NB: I have not tried to address any of the preexisting ailments of CCD.
Revision Changes Path
1.121 +143 -431 src/sys/dev/ccd/ccd.c
1.15 +2 -1 src/sys/sys/ccdvar.h
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