Cannot boot GuixSD after system reconfigure

Cannot boot GuixSD after system reconfigure

[Roel Janssen]

[-- Attachment #1: config.scm --]
[-- Type: application/octet-stream, Size: 3053 bytes --]

(use-modules (gnu)
             (gnu system nss)
             (linux-nonfree)
             (gnu packages admin)
             (gnu packages base)
             (gnu packages bootloaders)
             (gnu packages firmware)
             (gnu packages fonts)
             (gnu packages linux)
             (gnu packages ncurses)
             (srfi srfi-1))

(use-service-modules networking ssh desktop xorg databases)
(use-package-modules certs gnome)

(operating-system
  (host-name "antelope")
  (hosts-file (plain-file "hosts" (string-append
                                   (local-host-aliases host-name)
                                   %facebook-host-aliases)))

  (timezone "Europe/Amsterdam")
  (locale "en_US.UTF-8")

  (kernel-arguments (list "modprobe.blacklist=pcspkr"
                          "quiet"
                          "rhgb"
                          "thinkpad_acpi.fan_control=1"))

  (bootloader (grub-configuration
           (grub grub-efi)
           (target "/dev/sda")
           (timeout 2)))

  (file-systems (cons*
                 (file-system
                   (device "/dev/sda2")
                   (mount-point "/boot")
                   (needed-for-boot? #t)
                   (type "ext4"))
                 (file-system
                   (device "/dev/sda1")
                   (mount-point "/boot/efi")
                   (needed-for-boot? #t)
                   (type "vfat"))
                 (file-system
                   (device "/dev/sda3")
                   (mount-point "/")
                   (options "ssd")
                   (type "btrfs"))
                 (file-system
                   (device "tmpfs")
                   (mount-point "/var/guix/temproots")
                   (type "tmpfs"))
                 (file-system
                   (device "tmpfs")
                   (mount-point "/tmp")
                   (type "tmpfs"))
                 %base-file-systems))

  (users (cons (user-account
                (name "roel")
                (password "")
                (comment "")
                (group "users")
                (supplementary-groups
                 '("wheel" "netdev" "kvm" "dialout" "audio" "video" "input"))
                (home-directory "/home/roel"))
               %base-user-accounts))

  (kernel linux-nonfree)
  (firmware (cons* iwlwifi-firmware-non-free ath9k-htc-firmware %base-packages))

  ;; This is where we specify system-wide packages.
  (packages (cons* nss-certs          ; for HTTPS access
                   ncurses            ; for the clear command
                   font-liberation
                   btrfs-progs
                   gnome-keyring
                   %base-packages))

  ;; Add GNOME. Use the "desktop" services, which include the X11 log-in
  ;; service, networking with NetworkManager, and more.
  (services (cons*
             (gnome-desktop-service)
             (rngd-service)
             %desktop-services))

  ;; Allow resolution of '.local' host names with mDNS.
  (name-service-switch %mdns-host-lookup-nss))

[-- Attachment #2: Type: text/plain, Size: 462 bytes --]

Dear Guix,

I 'guix pull'ed commit 228a398 and ran:
  guix system reconfigure /etc/config.scm

It looks like GRUB cannot find my root partition (/dev/sda3).  So, I
suspect that something has changed regarding specifying the partitions (UUIDs?).

I attached 'config.scm'.

Now, the hardest part.. How can I recover?  It doesn't boot the older
generations either, so I now use a Fedora live USB.

Any pointers are appreciated.

Thanks!

Kind regards,
Roel Janssen

Re: Cannot boot GuixSD after system reconfigure

[Roel Janssen]

Roel Janssen writes:

> Dear Guix,
>
> I 'guix pull'ed commit 228a398 and ran:
>   guix system reconfigure /etc/config.scm
>
> It looks like GRUB cannot find my root partition (/dev/sda3).  So, I
> suspect that something has changed regarding specifying the partitions (UUIDs?).
>
> I attached 'config.scm'.
>
> Now, the hardest part.. How can I recover?  It doesn't boot the older
> generations either, so I now use a Fedora live USB.
>
> Any pointers are appreciated.
>
> Thanks!
>
> Kind regards,
> Roel Janssen

So, I was able to fix GRUB by manually modifying /boot/grub/grub.cfg:

-search --label --set /dev/sda3
+search --no-floppy --fs-uuid --set <blkid uuid output>

Now, what changes do I have to make to my config to make it work
automatically again?

Kind regards,
Roel Janssen

Re: Cannot boot GuixSD after system reconfigure

[Ricardo Wurmus]

Hi Roel,

> So, I was able to fix GRUB by manually modifying /boot/grub/grub.cfg:
>
> -search --label --set /dev/sda3
> +search --no-floppy --fs-uuid --set <blkid uuid output>
>
> Now, what changes do I have to make to my config to make it work
> automatically again?

Instead of this:

                 (file-system
                   (device "/dev/sda3")
                   (mount-point "/")
                   (options "ssd")
                   (type "btrfs"))

Try this:

               (file-system
                 (mount-point "/")
                 (options "ssd")
                 (type "btrfs")
                 (title 'uuid)
                 (device (uuid "4dab5feb-d176-45de-b287-9b0a6e4c01cb")))

But do replace the UUID with your actual UUID.  I’ve copied this
straight from the manual and haven’t tested this myself as I’m using
mapped devices and don’t have a btrfs partition.

-- 
Ricardo

GPG: BCA6 89B6 3655 3801 C3C6  2150 197A 5888 235F ACAC
https://elephly.net

Re: Cannot boot GuixSD after system reconfigure

[Ludovic Courtès]

Hi Roel,

Roel Janssen <roel@gnu.org> skribis:

> Roel Janssen writes:
>
>> Dear Guix,
>>
>> I 'guix pull'ed commit 228a398 and ran:
>>   guix system reconfigure /etc/config.scm
>>
>> It looks like GRUB cannot find my root partition (/dev/sda3).  So, I
>> suspect that something has changed regarding specifying the partitions (UUIDs?).

[...]

> So, I was able to fix GRUB by manually modifying /boot/grub/grub.cfg:
>
> -search --label --set /dev/sda3
> +search --no-floppy --fs-uuid --set <blkid uuid output>

I believe this is fixed with db4e8fd5d4a07d3be8ce68fb96722ef7077c0eee.

Could you please let me know if everything’s OK?

Thanks,
Ludo’.

bug#28445: Cannot boot GuixSD after system reconfigure

[Roel Janssen]

Ludovic Courtès writes:

> Hi Roel,
>
> Roel Janssen <roel@gnu.org> skribis:
>
>> Roel Janssen writes:
>>
>>> Dear Guix,
>>>
>>> I 'guix pull'ed commit 228a398 and ran:
>>>   guix system reconfigure /etc/config.scm
>>>
>>> It looks like GRUB cannot find my root partition (/dev/sda3).  So, I
>>> suspect that something has changed regarding specifying the partitions (UUIDs?).
>
> [...]
>
>> So, I was able to fix GRUB by manually modifying /boot/grub/grub.cfg:
>>
>> -search --label --set /dev/sda3
>> +search --no-floppy --fs-uuid --set <blkid uuid output>
>
> I believe this is fixed with db4e8fd5d4a07d3be8ce68fb96722ef7077c0eee.
>
> Could you please let me know if everything’s OK?

I changed the following pieces of my config:

  (bootloader (bootloader-configuration
               (bootloader grub-efi-bootloader)
               (target "/boot/efi")))

  (file-systems (cons*
                 (file-system
                  (title 'uuid)
                  (device (uuid "<uuid>"))
                  (mount-point "/boot")
                  (needed-for-boot? #t)
                  (type "ext4"))
		 (file-system
                  (title 'device)
                  (device "/dev/sda1")
                  (mount-point "/boot/efi")
                  (needed-for-boot? #t)
                  (type "vfat"))
                 (file-system
                  (mount-point "/")
                  (options "ssd")
                  (title 'uuid)
                  (device (uuid "<uuid>"))
                  (options "ssd")
                  (type "btrfs"))
                 (file-system
                  (title 'device)
                  (device "tmpfs")
                  (mount-point "/var/guix/temproots")
                  (type "tmpfs"))
                 (file-system
                  (title 'device)
                  (device "tmpfs")
                  (mount-point "/tmp")
                  (type "tmpfs"))
                 %base-file-systems))

And with these changes, I can boot GuixSD again.

The vfat partitions have a shorter UUID, which are not accepted by
Guix.  Is this on purpose?  As you can see in the snippet above, I use
'device for the vfat partition and 'uuid for the other disk-based
partitions.  It would be nice to use UUIDs for every partition.

Thanks for your time.

Kind regards,
Roel Janssen

Re: Cannot boot GuixSD after system reconfigure

[Ludovic Courtès]

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Roel Janssen <roel@gnu.org> skribis:

> Ludovic Courtès writes:

[...]

>>> So, I was able to fix GRUB by manually modifying /boot/grub/grub.cfg:
>>>
>>> -search --label --set /dev/sda3
>>> +search --no-floppy --fs-uuid --set <blkid uuid output>
>>
>> I believe this is fixed with db4e8fd5d4a07d3be8ce68fb96722ef7077c0eee.
>>
>> Could you please let me know if everything’s OK?
>
> I changed the following pieces of my config:
>
>   (bootloader (bootloader-configuration
>                (bootloader grub-efi-bootloader)
>                (target "/boot/efi")))
>
>   (file-systems (cons*
>                  (file-system
>                   (title 'uuid)
>                   (device (uuid "<uuid>"))
>                   (mount-point "/boot")
>                   (needed-for-boot? #t)
>                   (type "ext4"))
> 		 (file-system
>                   (title 'device)
>                   (device "/dev/sda1")
>                   (mount-point "/boot/efi")
>                   (needed-for-boot? #t)
>                   (type "vfat"))
>                  (file-system
>                   (mount-point "/")
>                   (options "ssd")
>                   (title 'uuid)
>                   (device (uuid "<uuid>"))
>                   (options "ssd")
>                   (type "btrfs"))
>                  (file-system
>                   (title 'device)
>                   (device "tmpfs")
>                   (mount-point "/var/guix/temproots")
>                   (type "tmpfs"))
>                  (file-system
>                   (title 'device)
>                   (device "tmpfs")
>                   (mount-point "/tmp")
>                   (type "tmpfs"))
>                  %base-file-systems))
>
> And with these changes, I can boot GuixSD again.

You mean the fix was insufficient?

> The vfat partitions have a shorter UUID, which are not accepted by
> Guix.  Is this on purpose?  As you can see in the snippet above, I use
> 'device for the vfat partition and 'uuid for the other disk-based
> partitions.  It would be nice to use UUIDs for every partition.

The attached patch almost gets us there: it would allow you to write

  (uuid "aaaa-bbbb" 'fat32)

in your config.

However, there’s one thing I’d like to double-check with Danny, which is
the word order.  With this patch, I have:

  (fat32-uuid->string (string->fat32-uuid "aabb-ccdd"))
  $7 = "CCDD-AABB"

Danny: are you sure the most-significant 16-bit word comes last?

Ludo’.


[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
[-- Attachment #2: Type: text/x-patch, Size: 1408 bytes --]

diff --git a/gnu/system/uuid.scm b/gnu/system/uuid.scm
index 1dd6a1133..dea2083c4 100644
--- a/gnu/system/uuid.scm
+++ b/gnu/system/uuid.scm
@@ -41,6 +41,7 @@
             string->ext3-uuid
             string->ext4-uuid
             string->btrfs-uuid
+            string->fat32-uuid
             iso9660-uuid->string
 
             ;; XXX: For lack of a better place.
@@ -175,6 +176,22 @@ ISO9660 UUID representation."
         (low (bytevector-uint-ref uuid 2 %fat32-endianness 2)))
     (format #f "~:@(~x-~x~)" low high)))
 
+(define %fat32-uuid-rx
+  (make-regexp "^([[:xdigit:]]{4})-([[:xdigit:]]{4})$"))
+
+(define (string->fat32-uuid str)
+  "Parse STR, which is in FAT32 format, and return a bytevector or #f."
+  (match (regexp-exec %fat32-uuid-rx str)
+    (#f
+     #f)
+    (rx-match
+     (uint-list->bytevector (list (string->number
+                                   (match:substring rx-match 1) 16)
+                                  (string->number
+                                   (match:substring rx-match 2) 16))
+                            %fat32-endianness
+                            2))))
+
 \f
 ;;;
 ;;; Generic interface.
@@ -198,6 +215,7 @@ ISO9660 UUID representation."
 (define %uuid-parsers
   (vhashq
    ('dce 'ext2 'ext3 'ext4 'btrfs 'luks => string->dce-uuid)
+   ('fat32 'fat => string->fat32-uuid)
    ('iso9660 => string->iso9660-uuid)))
 
 (define %uuid-printers

bug#28445: Cannot boot GuixSD after system reconfigure

[Danny Milosavljevic]

On Fri, 22 Sep 2017 16:03:47 +0200
ludo@gnu.org (Ludovic Courtès) wrote:

> However, there’s one thing I’d like to double-check with Danny, which is
> the word order.  With this patch, I have:
> 
>   (fat32-uuid->string (string->fat32-uuid "aabb-ccdd"))
>   $7 = "CCDD-AABB"
> 
> Danny: are you sure the most-significant 16-bit word comes last?

See https://github.com/karelzak/util-linux/blob/master/libblkid/src/superblocks/vfat.c#L48

blkid_probe_sprintf_uuid(pr, vol_serno, 4, "%02X%02X-%02X%02X",
vol_serno[3], vol_serno[2], vol_serno[1], vol_serno[0]);

Re: Cannot boot GuixSD after system reconfigure

[Ludovic Courtès]

Danny Milosavljevic <dannym@scratchpost.org> skribis:

> On Fri, 22 Sep 2017 16:03:47 +0200
> ludo@gnu.org (Ludovic Courtès) wrote:
>
>> However, there’s one thing I’d like to double-check with Danny, which is
>> the word order.  With this patch, I have:
>> 
>>   (fat32-uuid->string (string->fat32-uuid "aabb-ccdd"))
>>   $7 = "CCDD-AABB"
>> 
>> Danny: are you sure the most-significant 16-bit word comes last?
>
> See https://github.com/karelzak/util-linux/blob/master/libblkid/src/superblocks/vfat.c#L48
>
> blkid_probe_sprintf_uuid(pr, vol_serno, 4, "%02X%02X-%02X%02X",
> vol_serno[3], vol_serno[2], vol_serno[1], vol_serno[0]);

I see, thanks!

Roel, with commit 8a7d81a5e23c4d59fbabf2550db32d4ba5572e4b, you should
be able to write:

  (uuid "abcd-1234" 'fat32)

in your config, and it should work.

Let me know if it doesn’t.  :-)

Ludo’.

Re: Cannot boot GuixSD after system reconfigure

[Roel Janssen]

Ludovic Courtès writes:

> Danny Milosavljevic <dannym@scratchpost.org> skribis:
>
>> On Fri, 22 Sep 2017 16:03:47 +0200
>> ludo@gnu.org (Ludovic Courtès) wrote:
>>
>>> However, there’s one thing I’d like to double-check with Danny, which is
>>> the word order.  With this patch, I have:
>>> 
>>>   (fat32-uuid->string (string->fat32-uuid "aabb-ccdd"))
>>>   $7 = "CCDD-AABB"
>>> 
>>> Danny: are you sure the most-significant 16-bit word comes last?
>>
>> See https://github.com/karelzak/util-linux/blob/master/libblkid/src/superblocks/vfat.c#L48
>>
>> blkid_probe_sprintf_uuid(pr, vol_serno, 4, "%02X%02X-%02X%02X",
>> vol_serno[3], vol_serno[2], vol_serno[1], vol_serno[0]);
>
> I see, thanks!
>
> Roel, with commit 8a7d81a5e23c4d59fbabf2550db32d4ba5572e4b, you should
> be able to write:
>
>   (uuid "abcd-1234" 'fat32)
>
> in your config, and it should work.
>
> Let me know if it doesn’t.  :-)
>
> Ludo’.

I could generate a new system, but upon booting it, I was dropped to a
Guile REPL.

So it doesn't seem to work.  How can I troubleshoot from there?

I used the following configuration for the EFI partition:

  (file-system
    (title 'uuid)
    (device (uuid "72E5-26A0" 'fat32))
    (mount-point "/boot/efi")
    (needed-for-boot? #t)
    (type "vfat"))

Thanks for your work!

Kind regards,
Roel Janssen

Re: Cannot boot GuixSD after system reconfigure

[Ludovic Courtès]

Hi Roel,

Roel Janssen <roel@gnu.org> skribis:

> I could generate a new system, but upon booting it, I was dropped to a
> Guile REPL.

Could you check what the error was?  (You can type “,error” at the REPL
if the message disappeared.)

> So it doesn't seem to work.  How can I troubleshoot from there?
>
> I used the following configuration for the EFI partition:
>
>   (file-system
>     (title 'uuid)
>     (device (uuid "72E5-26A0" 'fat32))
>     (mount-point "/boot/efi")
>     (needed-for-boot? #t)
>     (type "vfat"))

I don’t see yet what could possibly go wrong.  Note that
‘needed-for-boot?’ can be #f (it’s definitely not needed for boot), but
both should work.

Thanks,
Ludo’.

Re: Cannot boot GuixSD after system reconfigure

[Danny Milosavljevic]

What does it reply to

,bt

?

bug#28445: Cannot boot GuixSD after system reconfigure

[Roel Janssen]

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Ludovic Courtès writes:

> Hi Roel,
>
> Roel Janssen <roel@gnu.org> skribis:
>
>> I could generate a new system, but upon booting it, I was dropped to a
>> Guile REPL.
>
> Could you check what the error was?  (You can type “,error” at the REPL
> if the message disappeared.)
>
>> So it doesn't seem to work.  How can I troubleshoot from there?
>>
>> I used the following configuration for the EFI partition:
>>
>>   (file-system
>>     (title 'uuid)
>>     (device (uuid "72E5-26A0" 'fat32))
>>     (mount-point "/boot/efi")
>>     (needed-for-boot? #t)
>>     (type "vfat"))
>
> I don’t see yet what could possibly go wrong.  Note that
> ‘needed-for-boot?’ can be #f (it’s definitely not needed for boot), but
> both should work.
>
> Thanks,
> Ludo’.

I attached a photograph of the boot.  Unfortunately, it doesn't seem
very informative to me.

My partition layout is like to:

Device       Start       End   Sectors   Size Type
/dev/sda1     2048   1026047   1024000   500M EFI System
/dev/sda2  1026048   2050047   1024000   500M Linux filesystem
/dev/sda3  2050048 976773134 974723087 464.8G Linux filesystem

/dev/sda2 -> /boot
/dev/sda2 -> /boot/efi
/dev/sda3 -> /

Thanks for your efforts!

Kind regards,
Roel Janssen


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