Date: Thu, 28 Sep 2017 17:31:40 +0200 From: Nick Hibma <nick@van-laarhoven.org> To: FreeBSD Current Mailing List <freebsd-current@FreeBSD.ORG> Subject: How do GEOM_PART_* options configure geom_part_* modules?? Message-ID: <FD2F9831-F5E9-459D-B250-E5D9AE72DA08@van-laarhoven.org>
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[-- Attachment #1 --] I created a new kernel config file from scratch, wondered what the GEOM_PART_MBR option and friends were doing, search for them, didn't find them in the tree, and deleted them from my config. But... de resulting disk image didn't boot, because of the fact that it didn't recognise the MBR partitions (it only had a single diskid entry on the mount-root prompt). Can anyone explain to me how these kernel options work, as in: they are defined in kernel configs and as a consequence in opt_geom.h, but how are they actually used to select which geom_part_* modules/kernel parts to build? I thought these options were translated to stuff that cpp would use, but there are not uses of for example GEOM_PART_MBR anywhere for example! The only thing I was able to come up with, but could not figure out, was FEATURE() doing some magic. Thanks in advance for any pointers! Nick Hibma nick@van-laarhoven.org <mailto:nick@van-laarhoven.org> -- Open Source: We stand on the shoulders of giants. % grep -r GEOM_PART_ /usr/src/sys/ | grep -Ev '/conf/.*options' /usr/src/sys/geom/part/g_part_mbr.c: "GEOM_PART_MBR Master Boot Record"); /usr/src/sys/geom/part/g_part_ldm.c: "GEOM_PART_LDM Logical Disk Manager"); /usr/src/sys/geom/part/g_part_ldm.c: * XXX: We use some knowledge about GEOM_PART_GPT internal /usr/src/sys/geom/part/g_part_ebr.c:#if defined(GEOM_PART_EBR_COMPAT) /usr/src/sys/geom/part/g_part_ebr.c:#ifndef GEOM_PART_EBR_COMPAT /usr/src/sys/geom/part/g_part_ebr.c:#if defined(GEOM_PART_EBR_COMPAT) /usr/src/sys/geom/part/g_part_ebr.c:#if defined(GEOM_PART_EBR_COMPAT) /usr/src/sys/geom/part/g_part_ebr.c:#if defined(GEOM_PART_EBR_COMPAT) /usr/src/sys/geom/part/g_part_ebr.c:#if defined(GEOM_PART_EBR_COMPAT) /usr/src/sys/geom/part/g_part_ebr.c:#ifndef GEOM_PART_EBR_COMPAT /usr/src/sys/geom/part/g_part_ebr.c:#ifndef GEOM_PART_EBR_COMPAT /usr/src/sys/geom/part/g_part_ebr.c:#ifndef GEOM_PART_EBR_COMPAT /usr/src/sys/geom/part/g_part_ebr.c:#ifndef GEOM_PART_EBR_COMPAT /usr/src/sys/geom/part/g_part.h:#ifndef _GEOM_PART_H_ /usr/src/sys/geom/part/g_part.h:#define _GEOM_PART_H_ /usr/src/sys/geom/part/g_part.h:#endif /* !_GEOM_PART_H_ */ [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG/MacGPG2 v2.2 Comment: GPGTools - https://gpgtools.org iQIzBAEBCgAdFiEETFbRZ/gKjBgO10CrH3Ic7sY0duAFAlnNFdwACgkQH3Ic7sY0 duD7ghAAlgLajw3bUgw4fyq9XVarB3nrKsdidExM/fTcHvK1digiAJ8p34lvzgaM ArMhmkZXWSnACCiXh48x5XUVz7PDepRwo+knp+jrgPe9fMg3BPhh/qLCVE/NtNSb MUI6XJ58NViG2MAkMl2UpJgUo9U3IYdHN21TdgeeYh2jta20D5174X7ADYePaLHy brViS44jCUn63ptylav8BoGzC9cKf6RqptaOBv308WpPHltbYtQtl3RlWsclZWOF 6Gy1aX24A0BtZcQrskYXD8qPJWt1tnqI5H5I3EVw4FSHsp5EY16blirkkZ9v29WR 4TJN+UTjtscsNLGCLWjG15BM7S9EuHWTv33pADA1AFzlBeZUU3jsdnYjTU5R6vng GixxZUvsXm+wUh6Vov5K7PqPdhwK3Lyo6pvdrkZfbtxmmTQVWB67DHCNawGApZvf WC9vecoAUqJO1d4dfnFau0E/w0qPE/Qp6u7aiqDnr0qKhg/9P2IYBt9K8pU9gdxU WA0FX+2fNd9qXXDnyOLLS3oSjJ75SN0X6g5kyfPoXVM5YbuTpNyg/bTrpvNh5gz/ R18qQelFm5XOuJGnUoIxcTcBLBWjUhICYP6pdj8Navnu3m0hkb5vZPXDwfdZmCiZ ujzA+Eb1nE+IrfJcxYWCwd0Z0JzKzB4dLWju6YYAf0uT9mqRR2s= =KCbk -----END PGP SIGNATURE-----
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