[bug #43396] TFTP boot: error: time out opening '/grub/i386-pc/normal.mod'

[Daniel Dehennin]

URL:
  <http://savannah.gnu.org/bugs/?43396>

                 Summary: TFTP boot: error: time out opening
'/grub/i386-pc/normal.mod'
                 Project: GNU GRUB
            Submitted by: nebuchadnezzar
            Submitted on: ven. 10 oct. 2014 09:54:05 CEST
                Category: Network
                Severity: Major
                Priority: 5 - Normal
              Item Group: None
                  Status: None
                 Privacy: Public
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 
                 Release: Git master
         Reproducibility: None
         Planned Release: None

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Details:

Hello,

I tried to setup a DHCP/TFTP boot with Grub2 from Debian 2.02~beta2-14 and git
master.

I used the following command to create the grub net directory:

    address@hidden:~# grub-mknetdir -v --net-directory=/var/lib/tftpboot 
--subdir
grub
    [...]
    grub-mknetdir: info: grub-mkimage --directory '/usr/lib/grub/i386-pc'
--prefix '/grub' --output '/var/lib/tftpboot/grub/i386-pc/core.0' --format
'i386-pc-pxe' --compression 'auto'  'tftp' 'pxe' 
    .
    grub-mknetdir: info: the total module size is 0xf5cc.
    grub-mknetdir: info: reading /usr/lib/grub/i386-pc/kernel.img.
    grub-mknetdir: info: locating the section .text at 0x0.
    grub-mknetdir: info: locating the section .rodata at 0x54d4.
    grub-mknetdir: info: locating the section .data at 0x6480.
    grub-mknetdir: info: locating the section .bss at 0x6c08.
    grub-mknetdir: info: reading /usr/lib/grub/i386-pc/bufio.mod.
    grub-mknetdir: info: reading /usr/lib/grub/i386-pc/datetime.mod.
    grub-mknetdir: info: reading /usr/lib/grub/i386-pc/boot.mod.
    grub-mknetdir: info: reading /usr/lib/grub/i386-pc/priority_queue.mod.
    grub-mknetdir: info: reading /usr/lib/grub/i386-pc/net.mod.
    grub-mknetdir: info: reading /usr/lib/grub/i386-pc/tftp.mod.
    grub-mknetdir: info: reading /usr/lib/grub/i386-pc/pxe.mod.
    grub-mknetdir: info: kernel_img=0x144cdb0, kernel_size=0x6c08.
    grub-mknetdir: info: the core size is 0x9b1b.
    grub-mknetdir: info: reading /usr/lib/grub/i386-pc/lzma_decompress.img.
    grub-mknetdir: info: reading /usr/lib/grub/i386-pc/pxeboot.img.
    grub-mknetdir: info: writing 0x400 bytes.
    grub-mknetdir: info: reading /usr/lib/grub/i386-pc/diskboot.img.
    grub-mknetdir: info: writing 0x200 bytes.
    grub-mknetdir: info: writing 0xa65b bytes.
    Netboot directory for i386-pc created. Configure your DHCP server to point
to /var/lib/tftpboot/grub/i386-pc/core.0
    grub-mknetdir: info: Looking for `/usr/lib/grub/i386-efi'.
    grub-mknetdir: info: Looking for `/usr/lib/grub/i386-ieee1275'.
    grub-mknetdir: info: Looking for `/usr/lib/grub/x86_64-efi'.
    grub-mknetdir: info: Looking for `/usr/lib/grub/sparc64-ieee1275'.
    grub-mknetdir: info: Looking for `/usr/lib/grub/powerpc-ieee1275'.
    grub-mknetdir: info: Looking for `/usr/lib/grub/ia64-efi'.
    grub-mknetdir: info: Looking for `/usr/lib/grub/arm-efi'.

My DHCP server is configured to serve “/grub/i386-pc/core.0”.

I boot a little zotac box using:

    06:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd.
RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev
06)

It get an IP address from the DHCP server, then it download core.0 from my
tftp server:

    Oct 10 09:22:23 tftp in.tftpd[29516]: RRQ from ::ffff:192.168.230.199
filename /grub/i386-pc/core.0
    Oct 10 09:22:23 tftp in.tftpd[29516]: tftp: client does not accept
options
    Oct 10 09:22:23 tftp in.tftpd[29517]: RRQ from ::ffff:192.168.230.199
filename /grub/i386-pc/core.0

The zotac hangs for several seconds and then it display:

    error: time out opening '/grub/i386-pc/normal.mod'.
    Entering rescue mode...
    grub rescue>

Running tcpdump on the TFTP server I see the download of core.0 but no packet
to get normal.mod.

Grub environment has the following variables:

    grub rescue> set
    cmdpath=(tftp,192.168.230.2)/grub/i386-pc
    net_default_interface=pxe
    net_default_ip=192.168.230.199
    net_default_mac=00:01:2e:3a:XX:XX
    net_default_server=192.168.230.2
    net_pxe_boot_file=/grub/i386-pc/core.0
    net_pxe_domain=example.net
    net_pxe_ip=192.168.230.199
    net_pxe_mac=00:01:2e:3a:XX:XX
    prefix=(tftp,192.168.230.2)/grub
    pxe_default_server=192.168.230.2
    root=tftp,192.168.230.2

The ls command returns nothing:

    grub rescue> ls

    grub rescue> 


The same apply with another machines using:

    01:00.1 Ethernet controller [0200]: Broadcom Corporation NetXtreme II
BCM5716 Gigabit Ethernet [14e4:163b] (rev 20)

and

    04:00.0 Ethernet controller [0200]: Broadcom Corporation NetXtreme BCM5721
Gigabit Ethernet PCI Express [14e4:1659] (rev 11)






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