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Bug#1060416: mmdebstrap-autopkgtest-build-qemu fails on mkfs.ext4; does it require a 25 GiB TMPDIR?

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Hi,

Quoting Francesco Poli (2024-01-12 20:05:02)
> On Thu, 11 Jan 2024 21:04:16 +0100 Johannes Schauer Marin Rodrigues wrote:
> > Do you see yourself debugging this further by yourself? You probably
> > understand that it's hard for me to investigate something that I cannot
> > test myself.
> 
> Well, you wrote the script, together with Helmut Grohne (who reads us
> in Cc).
> I rather see myself helping the two of you in debugging it...   :-)

could you try applying this patch and then try again:

--%<---------------------------------------------------------------------
--- a/mmdebstrap-autopkgtest-build-qemu
+++ b/mmdebstrap-autopkgtest-build-qemu
@@ -302,17 +302,12 @@ if test -n "$SCRIPT"; then
                '--customize-hook=rm -f "$1/userscript"'
 fi
 
-EXT4_OFFSET_BYTES=$(( (FAT_OFFSET_SECTORS + FAT_SIZE_SECTORS) * 512))
-EXT4_OPTIONS="offset=$EXT4_OFFSET_BYTES,assume_storage_prezeroed=1"
 set -- "$@" \
        "--customize-hook=download vmlinuz '$WORKDIR/kernel'" \
        "--customize-hook=download initrd.img '$WORKDIR/initrd'" \
-       '--customize-hook=mount --bind "$1" "$1/mnt"' \
-       '--customize-hook=mount --bind "$1/mnt/mnt" "$1/mnt/dev"' \
-       '--customize-hook=/sbin/mkfs.ext4 -d "$1/mnt" -L autopkgtestvm -E '"'$EXT4_OPTIONS' '$IMAGE' '$SIZE'" \
-       '--customize-hook=umount --lazy "$1/mnt"' \
+       --format=ext2 \
        "$RELEASE" \
-       /dev/null
+       "$IMAGE"
 
 test -n "$MIRROR" && set -- "$@" "$MIRROR"
 test -n "$KEYRING" && set -- "$@" "--keyring=$KEYRING"
@@ -320,6 +315,9 @@ test -n "$KEYRING" && set -- "$@" "--keyring=$KEYRING"
 echo "mmdebstrap $*"
 mmdebstrap "$@" || die "mmdebstrap failed"
 
+EXT4_OFFSET_BYTES=$(( (FAT_OFFSET_SECTORS + FAT_SIZE_SECTORS) * 512))
+fallocate --insert-range --offset=0 --length=$EXT4_OFFSET_BYTES "$IMAGE"
+
 unshare -U -r --map-groups=auto chown 0:0 "$IMAGE"
 chmod "$(printf %o "$(( 0666 - 0$(umask) ))")" "$IMAGE"
 
-->%---------------------------------------------------------------------

> Indeed, the error does not seem to have anything to do with a "No space left
> on device" failure:
> 
> [...]
>   mke2fs 1.47.0 (5-Feb-2023)
>   mkfs.ext4: Permission denied while trying to determine filesystem size
>   E: setup failed: E: command failed: /sbin/mkfs.ext4 -d "$1/mnt" -L autopkgtestvm -E 'offset=134217728,assume_storage_prezeroed=1' 'sid_amd64.img' '25G'
> [...]
> 
> What can cause mkfs.ext4 to fail with a "Permission denied" error?

This is unshare mode. Funny things happen. :)

The error message you see comes from misc/mke2fs.c in e2fsprogs as a result of
a failed call to ext2fs_open_file(). What puzzles me is, that it's permission
denied for you and working fine for me.

Thanks!

cheers, josch

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Bug#1060416: mmdebstrap-autopkgtest-build-qemu fails on mkfs.ext4; does it require a 25 GiB TMPDIR? "Francesco Poli (wintermute)" <invernomuto@paranoici.org> - 2024-01-11 00:00 +0100
  Bug#1060416: mmdebstrap-autopkgtest-build-qemu fails on mkfs.ext4; does it require a 25 GiB TMPDIR? Johannes Schauer Marin Rodrigues <josch@debian.org> - 2024-01-11 00:50 +0100
    Bug#1060416: mmdebstrap-autopkgtest-build-qemu fails on mkfs.ext4; does it require a 25 GiB TMPDIR? Francesco Poli <invernomuto@paranoici.org> - 2024-01-11 09:20 +0100
      Bug#1060416: mmdebstrap-autopkgtest-build-qemu fails on mkfs.ext4; does it require a 25 GiB TMPDIR? Johannes Schauer Marin Rodrigues <josch@debian.org> - 2024-01-11 21:10 +0100
        Bug#1060416: mmdebstrap-autopkgtest-build-qemu fails on mkfs.ext4; does it require a 25 GiB TMPDIR? Francesco Poli <invernomuto@paranoici.org> - 2024-01-12 20:10 +0100
          Bug#1060416: mmdebstrap-autopkgtest-build-qemu fails on mkfs.ext4; does it require a 25 GiB TMPDIR? Johannes Schauer Marin Rodrigues <josch@debian.org> - 2024-01-12 23:50 +0100
            Bug#1060416: mmdebstrap-autopkgtest-build-qemu fails on mkfs.ext4; does it require a 25 GiB TMPDIR? Francesco Poli <invernomuto@paranoici.org> - 2024-01-14 18:40 +0100
              Bug#1060416: mmdebstrap-autopkgtest-build-qemu fails on mkfs.ext4; does it require a 25 GiB TMPDIR? Johannes Schauer Marin Rodrigues <josch@debian.org> - 2024-01-15 17:50 +0100
          Bug#1060416: mmdebstrap-autopkgtest-build-qemu fails on mkfs.ext4; does it require a 25 GiB TMPDIR? Helmut Grohne <helmut@subdivi.de> - 2024-01-13 08:30 +0100
            Bug#1060416: mmdebstrap-autopkgtest-build-qemu fails on mkfs.ext4; does it require a 25 GiB TMPDIR? Johannes Schauer Marin Rodrigues <josch@debian.org> - 2024-01-13 20:30 +0100
              Bug#1060416: mmdebstrap-autopkgtest-build-qemu fails on mkfs.ext4; does it require a 25 GiB TMPDIR? Johannes Schauer Marin Rodrigues <josch@debian.org> - 2024-01-13 22:20 +0100
                Bug#1060416: mmdebstrap-autopkgtest-build-qemu fails on mkfs.ext4; does it require a 25 GiB TMPDIR? Francesco Poli <invernomuto@paranoici.org> - 2024-01-14 18:40 +0100
                Bug#1060416: mmdebstrap-autopkgtest-build-qemu fails on mkfs.ext4; does it require a 25 GiB TMPDIR? Helmut Grohne <helmut@subdivi.de> - 2024-01-15 07:40 +0100
                Bug#1060416: mmdebstrap-autopkgtest-build-qemu fails on mkfs.ext4; does it require a 25 GiB TMPDIR? Francesco Poli <invernomuto@paranoici.org> - 2024-01-16 00:30 +0100
                Bug#1060416: mmdebstrap-autopkgtest-build-qemu fails on mkfs.ext4; does it require a 25 GiB TMPDIR? Helmut Grohne <helmut@subdivi.de> - 2024-01-16 07:40 +0100
                Bug#1060416: mmdebstrap-autopkgtest-build-qemu fails on mkfs.ext4; does it require a 25 GiB TMPDIR? Johannes Schauer Marin Rodrigues <josch@debian.org> - 2024-01-16 11:10 +0100
                Bug#1060416: mmdebstrap-autopkgtest-build-qemu fails on mkfs.ext4; does it require a 25 GiB TMPDIR? Johannes Schauer Marin Rodrigues <josch@debian.org> - 2024-01-23 09:10 +0100
                Bug#1060416: mmdebstrap-autopkgtest-build-qemu fails on mkfs.ext4; does it require a 25 GiB TMPDIR? Johannes Schauer Marin Rodrigues <josch@debian.org> - 2024-01-25 13:40 +0100
                Bug#1060416: mmdebstrap-autopkgtest-build-qemu fails on mkfs.ext4; does it require a 25 GiB TMPDIR? Francesco Poli <invernomuto@paranoici.org> - 2024-01-27 19:00 +0100

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