On 11/2/23 12:23, Richard W.M. Jones wrote:
On Tue, Oct 31, 2023 at 09:45:15PM +0100, Laszlo Ersek wrote:
On 10/31/23 14:17, Andrey Drobyshev wrote:
On some older Debian-based distros (in particular, this is true for Debian 8) GRUB config file doesn't reside on EFI partition, but rather at /boot/grub/grub.cfg even if UEFI firmware is being used. As a result, in the UEFI case we get "error: no bootloader detected". Let's just append this path to the end of the corresponding list as a workaround when dealing with UEFI guests.
Signed-off-by: Andrey Drobyshev <andrey.drobyshev@virtuozzo.com> --- mldrivers/linux_bootloaders.ml | 12 ++++++++++++ 1 file changed, 12 insertions(+)
diff --git a/mldrivers/linux_bootloaders.ml b/mldrivers/linux_bootloaders.ml index 6f8857e..91c5ab9 100644 --- a/mldrivers/linux_bootloaders.ml +++ b/mldrivers/linux_bootloaders.ml @@ -375,6 +375,18 @@ let detect_bootloader (g : G.guestfs) root i_firmware = with G.Error msg -> error (f_"could not find bootloader mount point (%s): %s") mp msg in
+ (* + * Workaround for older UEFI-based Debian which may not have + * /boot/efi/EFI/debian/grub.cfg. + *) + let paths = + if g#exists "/boot/grub/grub.cfg" then + match i_firmware with + | Firmware.I_BIOS -> paths + | I_UEFI _ -> paths @ ["/boot/grub/grub.cfg"] + else paths + in + (* We can determine if the bootloader config file is grub 1 or * grub 2 just by looking at the filename. *)
I'm not sure if the g#exists check is helpful; after all, in the "loop" function, we have a stricter g#is_file check. IOW, if the special path does not exist (or does not resolve to a regular file, after following symlinks), then "loop" will drop the candidate anyway. And if g#exists returns true, then "loop" may still drop the candidate (or may keep it). So IMO, just the inner "match" would suffice.
Anyway, I don't want to draw this out forever, so with the g#exists check kept, or removed:
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Andrey, if we push this patch (to libguestfs-common) then we no longer need the other patch as the i_firmware parameter is still required, is that correct? I can push this once confirmed.
Hello Richard, Yes, you're right, this single patch is sufficient as it doesn't change the function signature. Feel free to omit the g#esists part as Laszlo suggested.
BTW I apologise for the mailing list problems. We are in the process of moving the server, and the mailing address is now 'guestfs@lists.libguestfs.org' with archives at https://lists.libguestfs.org . I haven't made the announcement yet.
Thanks for pointing out, automated response with the announcement did help here. Andrey