[Bug 1434512] [NEW] grubnetx64.efi.signed does not handle shop option 210 (pathprefix)

[Jan de Haan]

Public bug reported:

In an project of replacing the classic pxelinux.0 with a uefi compatible
one, I stumbled on a difference between grubnetx64 and pxelinux.0:

For pxelinux.0 we make heavy use of this feature: "Note that all
filename references are relative to the directory pxelinux.0 lives in."
(http://www.syslinux.org/old/pxe.php)

Debugging "pxe" boots with grubnetx64 shows that it tries to load it's
config files from the absolute root:

(note that bootx64.efi is a link to grubnetx64.efi.signed)

Mar 19 19:15:53 apc100 in.tftpd[7502]: RRQ from ::ffff:192.168.246.148 filename /macs/01-00-0c-29-5e-72-e3/bootx64.efi
Mar 19 19:15:54 apc100 in.tftpd[7503]: RRQ from ::ffff:192.168.246.148 filename /grub/x86_64-efi/command.lst
Mar 19 19:15:54 apc100 in.tftpd[7504]: RRQ from ::ffff:192.168.246.148 filename /grub/x86_64-efi/fs.lst
Mar 19 19:15:54 apc100 in.tftpd[7505]: RRQ from ::ffff:192.168.246.148 filename /grub/x86_64-efi/crypto.lst
Mar 19 19:15:54 apc100 in.tftpd[7506]: RRQ from ::ffff:192.168.246.148 filename /grub/x86_64-efi/terminal.lst
Mar 19 19:15:54 apc100 in.tftpd[7507]: RRQ from ::ffff:192.168.246.148 filename /grub/grub.cfg
Mar 19 19:15:54 apc100 in.tftpd[7508]: RRQ from ::ffff:192.168.246.148 filename /grub/grub.cfg
Mar 19 19:15:59 apc100 in.tftpd[7509]: RRQ from ::ffff:192.168.246.148 filename coreos_production_pxe.vmlinuz

Digging further shows the dhcp option 210 (path-prefix), which might
help. Question is whether grubnetx64 supports this.

** Affects: grub2-signed (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1434512

Title:
  grubnetx64.efi.signed does not handle shop option 210 (pathprefix)

Status in grub2-signed package in Ubuntu:
  New

Bug description:
  In an project of replacing the classic pxelinux.0 with a uefi
  compatible one, I stumbled on a difference between grubnetx64 and
  pxelinux.0:

  For pxelinux.0 we make heavy use of this feature: "Note that all
  filename references are relative to the directory pxelinux.0 lives
  in." (http://www.syslinux.org/old/pxe.php)

  Debugging "pxe" boots with grubnetx64 shows that it tries to load it's
  config files from the absolute root:

  (note that bootx64.efi is a link to grubnetx64.efi.signed)

  Mar 19 19:15:53 apc100 in.tftpd[7502]: RRQ from ::ffff:192.168.246.148 filename /macs/01-00-0c-29-5e-72-e3/bootx64.efi
  Mar 19 19:15:54 apc100 in.tftpd[7503]: RRQ from ::ffff:192.168.246.148 filename /grub/x86_64-efi/command.lst
  Mar 19 19:15:54 apc100 in.tftpd[7504]: RRQ from ::ffff:192.168.246.148 filename /grub/x86_64-efi/fs.lst
  Mar 19 19:15:54 apc100 in.tftpd[7505]: RRQ from ::ffff:192.168.246.148 filename /grub/x86_64-efi/crypto.lst
  Mar 19 19:15:54 apc100 in.tftpd[7506]: RRQ from ::ffff:192.168.246.148 filename /grub/x86_64-efi/terminal.lst
  Mar 19 19:15:54 apc100 in.tftpd[7507]: RRQ from ::ffff:192.168.246.148 filename /grub/grub.cfg
  Mar 19 19:15:54 apc100 in.tftpd[7508]: RRQ from ::ffff:192.168.246.148 filename /grub/grub.cfg
  Mar 19 19:15:59 apc100 in.tftpd[7509]: RRQ from ::ffff:192.168.246.148 filename coreos_production_pxe.vmlinuz

  Digging further shows the dhcp option 210 (path-prefix), which might
  help. Question is whether grubnetx64 supports this.

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