Merge pull request #25005 from Lassulus/copytoram
nixos/stage1: add copytoram support
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commit
fa5196e47e
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@ -34,6 +34,11 @@ ISO, copy its contents verbatim to your drive, then either:
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in <link xlink:href="https://www.kernel.org/doc/Documentation/kernel-parameters.txt">
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the kernel documentation</link> for more details).</para>
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</listitem>
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<listitem>
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<para>If you want to load the contents of the ISO to ram after bootin
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(So you can remove the stick after bootup) you can append the parameter
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<literal>copytoram</literal>to the <literal>options</literal> field.</para>
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</listitem>
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</itemizedlist>
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</para>
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@ -154,6 +154,9 @@ for o in $(cat /proc/cmdline); do
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fi
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ln -s "$root" /dev/root
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;;
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copytoram)
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copytoram=1
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;;
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esac
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done
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@ -474,6 +477,22 @@ while read -u 3 mountPoint; do
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# doing something with $device right now.
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udevadm settle
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# If copytoram is enabled: skip mounting the ISO and copy its content to a tmpfs.
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if [ -n "$copytoram" ] && [ "$device" = /dev/root ] && [ "$mountPoint" = /iso ]; then
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fsType=$(blkid -o value -s TYPE "$device")
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fsSize=$(blockdev --getsize64 "$device")
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mkdir -p /tmp-iso
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mount -t "$fsType" /dev/root /tmp-iso
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mountFS tmpfs /iso size="$fsSize" tmpfs
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cp -r /tmp-iso/* /mnt-root/iso/
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umount /tmp-iso
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rmdir /tmp-iso
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continue
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fi
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mountFS "$device" "$mountPoint" "$options" "$fsType"
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done
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