Re: [PATCH v2] grub-install: Install PV Xen binaries into the upstream specified path

[Andrei Borzenkov <arvidjaar@gmail.com>]

В Fri, 27 Mar 2015 16:40:14 +0100
Vladimir 'φ-coder/phcoder' Serbinenko <phcoder@gmail.com> пишет:

> On 23.10.2014 23:28, Ian Campbell wrote:
> > Upstream have defined a specification for where guests ought to place their
> > xenpv grub binaries in order to facilitate chainloading from a stage 1 grub
> > loaded from dom0.
> >
> > http://xenbits.xen.org/docs/unstable-staging/misc/x86-xenpv-bootloader.html
> >
> > The spec calls for installation into /boot/xen/pvboot-i386.elf or
> > /boot/xen/pvboot-x86_64.elf.
> >
> > Signed-off-by: Ian Campbell <ijc@hellion.org.uk>
> >
> > ---
> > v2: Respect bootdir, create /boot/xen as needed.
> > ---
> >   util/grub-install.c | 24 ++++++++++++++++++++++--
> >   1 file changed, 22 insertions(+), 2 deletions(-)
> >
> > diff --git a/util/grub-install.c b/util/grub-install.c
> > index 70f514c..7a7734e 100644
> > --- a/util/grub-install.c
> > +++ b/util/grub-install.c
> > @@ -1979,6 +1979,28 @@ main (int argc, char *argv[])
> >   	}
> >         break;
> >
> > +    case GRUB_INSTALL_PLATFORM_I386_XEN:
> > +      {
> > +	char *path = grub_util_path_concat (2, bootdir, "xen");
> > +	char *dst = grub_util_path_concat (2, path, "pvboot-i386.elf");
> > +	grub_install_mkdir_p (path);
> > +	grub_install_copy_file (imgfile, dst, 1);
> > +	free (dst);
> > +	free (path);
> > +      }
> > +      break;
> > +
> > +    case GRUB_INSTALL_PLATFORM_X86_64_XEN:
> > +      {
> > +	char *path = grub_util_path_concat (2, bootdir, "xen");
> Bootdir is not necessarily /boot. We also might want to specify xen dir 
> to e.g. /mnt/ext2/boot/xen while still keeping GRUB itself in 
> /boot/grub. Can you update patch to allow separate specification of 
> bootdir and xendir?

I think similar to --efi-directory it has to refer to mount point, not
to final destination; --xen-directory=/mnt will install
into /mnt/boot/xen. We do not have control over /boot/xen part.

It also means that grub-install needs to strip off relative path off
bootdir to build xendir on the same filesystem to get sane default.

> > +	char *dst = grub_util_path_concat (2, path, "pvboot-x86_64.elf");
> > +	grub_install_mkdir_p (path);
> > +	grub_install_copy_file (imgfile, dst, 1);
> > +	free (dst);
> > +	free (path);
> > +      }
> > +      break;
> > +
> >       case GRUB_INSTALL_PLATFORM_MIPSEL_LOONGSON:
> >       case GRUB_INSTALL_PLATFORM_MIPSEL_QEMU_MIPS:
> >       case GRUB_INSTALL_PLATFORM_MIPS_QEMU_MIPS:
> > @@ -1987,8 +2009,6 @@ main (int argc, char *argv[])
> >       case GRUB_INSTALL_PLATFORM_MIPSEL_ARC:
> >       case GRUB_INSTALL_PLATFORM_ARM_UBOOT:
> >       case GRUB_INSTALL_PLATFORM_I386_QEMU:
> > -    case GRUB_INSTALL_PLATFORM_I386_XEN:
> > -    case GRUB_INSTALL_PLATFORM_X86_64_XEN:
> >         grub_util_warn ("%s",
> >   		      _("WARNING: no platform-specific install was performed"));
> >         break;
> >
> 
> 
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