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UEFI PXE http boot failure
2016-10-31, 16:53
Post: #1
sneutralino Offline
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UEFI PXE http boot failure
Hello,

As a disclaimer I should probably state that I am quite new to iPXE, I have been educating myself by reading the documentation and from 3rd party sources, but I could not find any relevant information for the problem I will be describing below, that's why I am posting here today.

So I am trying to boot a set of linux binaries located on an HTTP server, but from time to time my system hangs after the final 'boot' command.

I am using iPXE version aa11f, and my boot script looks like this:

Code:
#!ipxe

# Global variables used by all other iPXE scripts
chain --autofree boot.ipxe.cfg

# Location of the kernel and initramfs
set image-url ${http-server}

# name of the kernel and initramfs
set kernel bzImage
set initramfs initrd

# Parameters to be passed to the kernel
set kernel-options console=ttyS0,115200 console=tty0

# iPXE boot commands
kernel ${image-url}/${kernel} initrd=${initramfs} ${kernel-options}
initrd ${image-url}/${initramfs}

prompt Press any key to continue

echo boot ${kernel}
boot ${kernel}

I compiled ipxe.efi with the following command:
Code:
make bin-x86_64-efi/ipxe.efi EMBED=chainload.ipxe DEBUG=tcp:1

I noticed the following:
  • If the 'boot' command is issued without delay after the 'initrd' command, the system freezes

    Quote:>>Start PXE over IPv4, Press [ESC] to EXIT...
    Station IP address is 10.0.107.120

    Server IP address is 10.0.4.183
    NBP filename is /tftpboot/ipxe/ipxe.efi
    NBP filesize is 921024 Bytes
    Downloading NBP file...
    iPXE initialising devices...ok




    iPXE 1.0.0+ (aa11f) -- Open Source Network Boot Firmware -- http://ipxe.org
    Features: DNS HTTP TFTP EFI Menu
    Could not open net0: Input/output error (http://ipxe.org/1d6a4698)
    Configuring (net1 00:80:a2:13:76:a1)...... ok
    00:80:a2:13:76:a1
    net1
    http://bucls1:8000/config/00-80-a2-13-76-a1.ipxe...TCP 0x91c2caa8 allocated
    TCP 0x91c2caa8 transitioned from CLOSED to SYN_SENT
    TCP 0x91c2caa8 bound to port 1025
    TCP 0x91c2caa8 timer fired in SYN_SENT for 2d75941b..2d75941b 00000000
    TCP 0x91c2caa8 using timestamps, SACK, TX window x1, RX window x1
    TCP 0x91c2caa8 transitioned from SYN_SENT to ESTABLISHED
    TCP 0x91c2caa8 transitioned from ESTABLISHED to FIN_WAIT_1
    ok
    boot.ipxe.cfg...TCP 0x91c2caa8 transitioned from FIN_WAIT_1 to CLOSING/LAST_ACK
    TCP 0x91c2caa8 transitioned from CLOSING/LAST_ACK to TIME_WAIT
    TCP 0x91c2c208 allocated
    TCP 0x91c2c208 transitioned from CLOSED to SYN_SENT
    TCP 0x91c2c208 bound to port 42658
    TCP 0x91c2c208 timer fired in SYN_SENT for 68b3bd60..68b3bd60 00000000
    TCP 0x91c2c208 using timestamps, SACK, TX window x1, RX window x1
    TCP 0x91c2c208 transitioned from SYN_SENT to ESTABLISHED
    TCP 0x91c2c208 transitioned from ESTABLISHED to FIN_WAIT_1
    TCP 0x91c2c208 transitioned from FIN_WAIT_1 to CLOSING/LAST_ACK
    ok
    http://buc/ipxe/bzImage...TCP 0x91c2c208 transitioned from CLOSING/LAST_ACK to TIME_WAIT
    TCP 0x91c2de28 allocated
    TCP 0x91c2de28 transitioned from CLOSED to SYN_SENT
    TCP 0x91c2de28 bound to port 59162
    TCP 0x91c2de28 timer fired in SYN_SENT for 6cbca57f..6cbca57f 00000000
    TCP 0x91c2de28 using timestamps, SACK, TX window x1, RX window x1
    TCP 0x91c2de28 transitioned from SYN_SENT to ESTABLISHED
    ok
    http://buc/ipxe/initrd... ok
    wait...
    boot bzImage
  • if I wait ~5 seconds after the 'initrd', 2 debug messages pop-up (They seems related to the download of bzImage. No logs are ever displayed for the download of initrd):

    Quote:TCP 0x91c2ce08 transitioned from ESTABLISHED to CLOSING/LAST_ACK
    TCP 0x91c2ce08 transitioned from CLOSING/LAST_ACK to TIME_WAIT

    If I issue the 'boot' command after those, the systems boots OK:

    Quote:>>Start PXE over IPv4, Press [ESC] to EXIT...
    Station IP address is 10.0.107.120

    Server IP address is 10.0.4.183
    NBP filename is /tftpboot/ipxe/ipxe.efi
    NBP filesize is 921024 Bytes
    Downloading NBP file...
    iPXE initialising devices...ok




    iPXE 1.0.0+ (aa11f) -- Open Source Network Boot Firmware -- http://ipxe.org
    Features: DNS HTTP TFTP EFI Menu
    Could not open net0: Input/output error (http://ipxe.org/1d6a4698)
    Configuring (net1 00:80:a2:13:76:a1)...... ok
    00:80:a2:13:76:a1
    net1
    http://bucls1:8000/config/00-80-a2-13-76-a1.ipxe...TCP 0x91c2c308 allocated
    TCP 0x91c2c308 transitioned from CLOSED to SYN_SENT
    TCP 0x91c2c308 bound to port 1025
    TCP 0x91c2c308 timer fired in SYN_SENT for 2d75941b..2d75941b 00000000
    TCP 0x91c2c308 using timestamps, SACK, TX window x1, RX window x1
    TCP 0x91c2c308 transitioned from SYN_SENT to ESTABLISHED
    TCP 0x91c2c308 transitioned from ESTABLISHED to FIN_WAIT_1
    ok
    boot.ipxe.cfg...TCP 0x91c2c308 transitioned from FIN_WAIT_1 to CLOSING/LAST_ACK
    TCP 0x91c2c308 transitioned from CLOSING/LAST_ACK to TIME_WAIT
    TCP 0x91c2c8c8 allocated
    TCP 0x91c2c8c8 transitioned from CLOSED to SYN_SENT
    TCP 0x91c2c8c8 bound to port 42658
    TCP 0x91c2c8c8 timer fired in SYN_SENT for 68b3bd60..68b3bd60 00000000
    TCP 0x91c2c8c8 using timestamps, SACK, TX window x1, RX window x1
    TCP 0x91c2c8c8 transitioned from SYN_SENT to ESTABLISHED
    TCP 0x91c2c8c8 transitioned from ESTABLISHED to FIN_WAIT_1
    TCP 0x91c2c8c8 transitioned from FIN_WAIT_1 to CLOSING/LAST_ACK
    ok
    http://buc/ipxe/bzImage...TCP 0x91c2c8c8 transitioned from CLOSING/LAST_ACK to TIME_WAIT
    TCP 0x91c2ce08 allocated
    TCP 0x91c2ce08 transitioned from CLOSED to SYN_SENT
    TCP 0x91c2ce08 bound to port 59162
    TCP 0x91c2ce08 timer fired in SYN_SENT for 6cbca57f..6cbca57f 00000000
    TCP 0x91c2ce08 using timestamps, SACK, TX window x1, RX window x1
    TCP 0x91c2ce08 transitioned from SYN_SENT to ESTABLISHED
    ok
    http://buc/ipxe/initrd... ok
    wait...
    Press any key to continue
    TCP 0x91c2ce08 transitioned from ESTABLISHED to CLOSING/LAST_ACK
    TCP 0x91c2ce08 transitioned from CLOSING/LAST_ACK to TIME_WAIT
    boot bzImage

    [ 0.000000] Initializing cgroup subsys cpuset
    [ 0.000000] Initializing cgroup subsys cpu
    [ 0.000000] Initializing cgroup subsys cpuacct
    [ 0.000000] Linux version 4.1.33-yocto-standard (damien@ansld2.ces.ch) (gcc version 5.2.0 (GCC) ) #1 SMP PREEMPT Mon Oct 31 00:44:11 CET 2016
    [ 0.000000] Command line: bzImage initrd=initrd console=ttyS0,115200 console=tty0
    [ 0.000000] KERNEL supported cpus:
    [ 0.000000] Intel GenuineIntel
    [...]
  • Sometime the system boots out of the box, without any the need of an additional sleep, in such case I get:

    Quote:iPXE 1.0.0+ (aa11f) -- Open Source Network Boot Firmware -- http://ipxe.org
    Features: DNS HTTP TFTP EFI Menu
    Could not open net0: Input/output error (http://ipxe.org/1d6a4698)
    Configuring (net1 00:80:a2:13:76:a1)...... ok
    00:80:a2:13:76:a1
    net1
    http://bucls1:8000/config/00-80-a2-13-76-a1.ipxe...TCP 0x91c2c308 allocated
    TCP 0x91c2c308 transitioned from CLOSED to SYN_SENT
    TCP 0x91c2c308 bound to port 1025
    TCP 0x91c2c308 timer fired in SYN_SENT for 2d75941b..2d75941b 00000000
    TCP 0x91c2c308 using timestamps, SACK, TX window x1, RX window x1
    TCP 0x91c2c308 transitioned from SYN_SENT to ESTABLISHED
    TCP 0x91c2c308 transitioned from ESTABLISHED to FIN_WAIT_1
    TCP 0x91c2c308 transitioned from FIN_WAIT_1 to CLOSING/LAST_ACK
    ok
    boot.ipxe.cfg...TCP 0x91c2c308 transitioned from CLOSING/LAST_ACK to TIME_WAIT
    TCP 0x91c2c8c8 allocated
    TCP 0x91c2c8c8 transitioned from CLOSED to SYN_SENT
    TCP 0x91c2c8c8 bound to port 42658
    TCP 0x91c2c8c8 timer fired in SYN_SENT for 68b3bd60..68b3bd60 00000000
    TCP 0x91c2c8c8 using timestamps, SACK, TX window x1, RX window x1
    TCP 0x91c2c8c8 transitioned from SYN_SENT to ESTABLISHED
    TCP 0x91c2c8c8 transitioned from ESTABLISHED to FIN_WAIT_1
    TCP 0x91c2c8c8 transitioned from FIN_WAIT_1 to CLOSING/LAST_ACK
    ok
    http://ansld3/ipxe/bzImage...TCP 0x91c2c8c8 transitioned from CLOSING/LAST_ACK to TIME_WAIT
    TCP 0x91c2de28 allocated
    TCP 0x91c2de28 transitioned from CLOSED to SYN_SENT
    TCP 0x91c2de28 bound to port 59162
    TCP 0x91c2de28 timer fired in SYN_SENT for 6cbca57f..6cbca57f 00000000
    TCP 0x91c2de28 using timestamps, SACK, TX window x1, RX window x1
    TCP 0x91c2de28 transitioned from SYN_SENT to ESTABLISHED
    TCP 0x91c2de28 transitioned from ESTABLISHED to FIN_WAIT_1
    TCP 0x91c2de28 transitioned from FIN_WAIT_1 to CLOSING/LAST_ACK
    ok
    http://ansld3/ipxe/initrd...TCP 0x91c2de28 transitioned from CLOSING/LAST_ACK to TIME_WAIT
    TCP 0x91c2d048 allocated
    TCP 0x91c2d048 transitioned from CLOSED to SYN_SENT
    TCP 0x91c2d048 bound to port 28039
    TCP 0x91c2d048 timer fired in SYN_SENT for 37e502df..37e502df 00000000
    TCP 0x91c2d048 using timestamps, SACK, TX window x1, RX window x1
    TCP 0x91c2d048 transitioned from SYN_SENT to ESTABLISHED
    56%TCP 0x91c2d048 transitioned from ESTABLISHED to FIN_WAIT_1
    TCP 0x91c2d048 transitioned from FIN_WAIT_1 to CLOSING/LAST_ACK ok
    wait...
    boot bzImage


    [ 0.000000] Initializing cgroup subsys cpuset
    [ 0.000000] Initializing cgroup subsys cpu
    [...]


From here I am not sure where to go.
I would bet that my network infrastructure is most probably guilty of those random late transition from CLOSING/LAST_ACK to TIME_WAIT, but there is nothing I can do on that side.
Is there a way to put more debug messages to understand where iPXE freezes more exactly and why ? Any idea would be much appreciated !

Not sure it is related, but for the record I should mention that I also suffer from time to time of that stalling http download problem that was already reported in a few other posts.
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2016-11-02, 11:47
Post: #2
robinsmidsrod Offline
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RE: UEFI PXE http boot failure
Try DEBUG=tcp:3 or DEBUG=tcp:7 and see if that gives you some more information. If that doesn't give you anything try to join us on IRC and see if you're able to debug interactively with some members of the community.
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2016-11-02, 15:42
Post: #3
sneutralino Offline
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RE: UEFI PXE http boot failure
Thank you for your feedback, I will give that a try !
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2016-11-14, 08:23
Post: #4
dobby Offline
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RE: UEFI PXE http boot failure
Did you come to any conclusion of what was causing this?
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