Date: Fri, 16 Sep 2016 01:06:51 -0400 From: Allan Jude <allanjude@freebsd.org> To: Zaphod Beeblebrox <zbeeble@gmail.com> Cc: freebsd-current <freebsd-current@freebsd.org> Subject: Re: Trying to read linux-lvm on 11.0-RC2 using geom, bhyve, fail. Message-ID: <538aa933-79e3-904e-0847-9a38485d41dd@freebsd.org> In-Reply-To: <CACpH0MdvTKPMWBBqs%2BSY1YBD0SRe_fTwwf0APwEL4LhqaeM9eQ@mail.gmail.com> References: <CACpH0MdSk0KVBNw7a1DPswsUr0JRyFA4i2R7NM6apoZPdG3-Pw@mail.gmail.com> <ec30810e-6020-ae35-31f8-39772cb03588@freebsd.org> <CACpH0MdvTKPMWBBqs%2BSY1YBD0SRe_fTwwf0APwEL4LhqaeM9eQ@mail.gmail.com>
next in thread | previous in thread | raw e-mail | index | archive | help
This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --onCjmsPLD3rXht5r95Fh1tfpDSlvBplAr Content-Type: multipart/mixed; boundary="tKDNqrP5PCHptGRdjG43aSDT5uLGrKFlu"; protected-headers="v1" From: Allan Jude <allanjude@freebsd.org> To: Zaphod Beeblebrox <zbeeble@gmail.com> Cc: freebsd-current <freebsd-current@freebsd.org> Message-ID: <538aa933-79e3-904e-0847-9a38485d41dd@freebsd.org> Subject: Re: Trying to read linux-lvm on 11.0-RC2 using geom, bhyve, fail. References: <CACpH0MdSk0KVBNw7a1DPswsUr0JRyFA4i2R7NM6apoZPdG3-Pw@mail.gmail.com> <ec30810e-6020-ae35-31f8-39772cb03588@freebsd.org> <CACpH0MdvTKPMWBBqs+SY1YBD0SRe_fTwwf0APwEL4LhqaeM9eQ@mail.gmail.com> In-Reply-To: <CACpH0MdvTKPMWBBqs+SY1YBD0SRe_fTwwf0APwEL4LhqaeM9eQ@mail.gmail.com> --tKDNqrP5PCHptGRdjG43aSDT5uLGrKFlu Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable On 2016-09-16 01:04, Zaphod Beeblebrox wrote: >=20 >=20 >=20 > Are you using zvols to back the VMs? Make sure they are in 'volmode= =3Ddev' > not 'geom' (the default), or GEOM will lock the device when it dete= cts a > partition table being written to the zvol (from the installer insid= e > the VM) >=20 > Note that this setting requires you to export/import the pool or re= boot > to apply. >=20 >=20 > No, no. The whole point here is that I was booting the raw disk.=20 > "ada1" as it were. > =20 You might try the dangerous 'shoot yourself in the foot mode' for geom: man 4 geom: 0x10 (allow foot shooting) Allow writing to Rank 1 providers. This would, for example, allow the super-user to overwrite the MBR on the root disk or write random sectors elsewhere to a mounted disk. The implications are obvious. sysctl kern.geom.debugflags=3D16 --=20 Allan Jude --tKDNqrP5PCHptGRdjG43aSDT5uLGrKFlu-- --onCjmsPLD3rXht5r95Fh1tfpDSlvBplAr Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.22 (MingW32) iQIcBAEBAgAGBQJX233xAAoJEBmVNT4SmAt+U0IP/jLtrf56nlbRhnyH19u/vKRm C/5NTOBLjwHI6ERXlPVnXkdqpLaJMJHFmykdEHGGpEHT64ZfaIBQxfvDHi/kjz7e 03+9yDBQdZv5O3+TE72CUTiZbtnYzJmu5T9WY/9gmS4lQaF+eSl0mSXWNVpLg4oV lJ+0R1lvd6VgTlqMUbn18X3MY+Or+qkH9ULxQk5tWKIFkZ3URsp7aiuOC52kiLHJ EjdrzK8+hj94+AETgIn03JhL4SGqt6N4CHCqgJqsJD8ig8r9uMjyDT46cLnhr2Gg yuc+m1e0bwExFicNqLcUA+URdA//yexYHoctjAoCpw8NwWRu2+3U+CkCblM/gf/U P4QXw07M5hneL5EXx8pxBILHHaAd2uMG9PckJJrSb/dCnzQ4VISl3RrF27gD4XXj 6tt0Y9rPnbD7GAiXmZMaklIwcO4tdLMgmifOjW0LOsal5FCqmMmtLvPZfaZO0PBI mZrB3Oh++o1O1iFU++QhBxcMzhrBUSyMFAF/W17CbSNGcJwGQHPZapeJFUKNMowP UAIg2AvSqIlt3BQtkja9gxPhfK7xhby0mLjprrtFz7jOOCH2xG0ckl+japCyQjAB 4OK6POmG77sd2m+W7EMXHH653Uo4gTftM32T6VHgiIg6lk6SHA2dqVyLzUeQMpNp yF8T1SVGYkKM3fpTKtGF =p+Ua -----END PGP SIGNATURE----- --onCjmsPLD3rXht5r95Fh1tfpDSlvBplAr--
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?538aa933-79e3-904e-0847-9a38485d41dd>