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Linutronix / elbe

Embedded Linux Build Environment
https://elbe-rfs.org
GNU General Public License v3.0
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How to extract sda1.img containing /boot/efi? #361

Closed coveritytest closed 1 year ago

coveritytest commented 1 year ago

I need to extract sda1.img containing /boot/efi. But unfortunately sda1.img does not contain /boot/efi, it only contains an empty fat formatted image. Here is my complete XML:

<!--
SPDX-License-Identifier: 0BSD
SPDX-FileCopyrightText: Linutronix GmbH
-->
<ns0:RootFileSystem xmlns:ns0="https://www.linutronix.de/projects/Elbe" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" created="2009-05-20T08:50:56" revision="6" xsi:schemaLocation="https://www.linutronix.de/projects/Elbe dbsfed.xsd">
    <project>
        <name>amd64-grub-uefi-buster</name>
        <version>1.0</version>
        <description>
            verify successful UEFI boot by checking
            lsmod | grep efi
            ls /sys/firmware/efi

            test UEFI boot in qemu by installing "ovmf" and using the parameter
            -bios /usr/share/qemu/OVMF.fd
        </description>
        <buildtype>amd64</buildtype>
        <mirror>
            <primary_host>ftp.de.debian.org</primary_host>
            <primary_path>/debian</primary_path>
            <primary_proto>http</primary_proto>
            <url-list>
                <url>
                    <binary>http://security.debian.org buster/updates main</binary>
                    <source>http://security.debian.org buster/updates main</source>
                </url>
            </url-list>
        </mirror>
        <suite>buster</suite>
    </project>
    <target>
        <hostname>lxvm</hostname>
        <domain>tec.linutronix.de</domain>
        <passwd>foo</passwd>
        <console>ttyS0,115200</console>
        <package>
            <tar>
                <name>grub-uefi-rfs.tgz</name>
            </tar>
        </package>
        <images>
            <!-- use GPT for UEFI -->
            <gpthd>
                <name>sda.img</name>
                <size>2GiB</size>
                <!-- install grub -->
                <grub-install/>
                <!-- the EFI system partition -->
                <partition> 
                    <size>200MiB</size>
                    <label>uefi</label>
                    <bootable>true</bootable>
                </partition>
            </gpthd>
        </images>
        <fstab>
            <!-- the EFI system partition needs to be mounted at /boot/efi -->
            <bylabel>
                <label>uefi</label>
                <mountpoint>/boot/efi</mountpoint>
                <fs>
                    <type>vfat</type>
                </fs>
            </bylabel>
        </fstab>
        <install-recommends />
        <pkg-list>
            <!-- install the signed EFI version of grub -->
            <pkg>grub-efi-amd64-signed</pkg>
            <pkg>shim-signed</pkg>
            <pkg>linux-image-amd64</pkg>
        </pkg-list>
        <project-finetuning>
            <losetup img="sda.img">
                <extract_partition part="1">sda1.img</extract_partition>
                <command part="1">
                  ls $ELBE_MNT
                </command>
            </losetup>
            <set_packer packer="none">sda1.img</set_packer>
        </project-finetuning>
    </target>
</ns0:RootFileSystem>

It is based on examples/x86_64-pc-hdimg-grub-uefi-buster.xml, I just removed the part where the rfs is extracted, which I do not want. Here is the patch:

--- <unnamed>
+++ <unnamed>
@@ -51,21 +51,9 @@
                    <label>uefi</label>
                    <bootable>true</bootable>
                </partition>
-               <partition>
-                   <size>remain</size>
-                   <label>rfs</label>
-               </partition>
            </gpthd>
        </images>
        <fstab>
-           <bylabel>
-               <label>rfs</label>
-               <mountpoint>/</mountpoint>
-               <fs>
-                   <type>ext4</type>
-                   <tune2fs>-i 0</tune2fs>
-               </fs>
-           </bylabel>
            <!-- the EFI system partition needs to be mounted at /boot/efi -->
            <bylabel>
                <label>uefi</label>
@@ -85,13 +73,11 @@
        <project-finetuning>
            <losetup img="sda.img">
                <extract_partition part="1">sda1.img</extract_partition>
-               <extract_partition part="2">sda2.img</extract_partition>
                <command part="1">
                  ls $ELBE_MNT
                </command>
            </losetup>
            <set_packer packer="none">sda1.img</set_packer>
-           <set_packer packer="tarxz">sda2.img</set_packer>
        </project-finetuning>
    </target>
 </ns0:RootFileSystem>

Why is sda1.img empty and does not contain /boot/efi?

bgermann commented 1 year ago

You removed mountpoint /. Please have / and try again.

coveritytest commented 1 year ago

I added the mountpoint again, problem still exists, sda1.img does not contain /boot/efi. Here's the adapted XML:

<!--
SPDX-License-Identifier: 0BSD
SPDX-FileCopyrightText: Linutronix GmbH
-->
<ns0:RootFileSystem xmlns:ns0="https://www.linutronix.de/projects/Elbe" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" created="2009-05-20T08:50:56" revision="6" xsi:schemaLocation="https://www.linutronix.de/projects/Elbe dbsfed.xsd">
    <project>
        <name>amd64-grub-uefi-buster</name>
        <version>1.0</version>
        <description>
            verify successful UEFI boot by checking
            lsmod | grep efi
            ls /sys/firmware/efi

            test UEFI boot in qemu by installing "ovmf" and using the parameter
            -bios /usr/share/qemu/OVMF.fd
        </description>
        <buildtype>amd64</buildtype>
        <mirror>
            <primary_host>ftp.de.debian.org</primary_host>
            <primary_path>/debian</primary_path>
            <primary_proto>http</primary_proto>
            <url-list>
                <url>
                    <binary>http://security.debian.org buster/updates main</binary>
                    <source>http://security.debian.org buster/updates main</source>
                </url>
            </url-list>
        </mirror>
        <suite>buster</suite>
    </project>
    <target>
        <hostname>lxvm</hostname>
        <domain>tec.linutronix.de</domain>
        <passwd>foo</passwd>
        <console>ttyS0,115200</console>
        <package>
            <tar>
                <name>grub-uefi-rfs.tgz</name>
            </tar>
        </package>
        <images>
            <!-- use GPT for UEFI -->
            <gpthd>
                <name>sda.img</name>
                <size>2GiB</size>
                <!-- install grub -->
                <grub-install/>
                <!-- the EFI system partition -->
                <partition> 
                    <size>200MiB</size>
                    <label>uefi</label>
                    <bootable>true</bootable>
                </partition>
            </gpthd>
        </images>
        <fstab>
            <bylabel>
                <label>rfs</label>
                <mountpoint>/</mountpoint>
                <fs>
                    <type>ext4</type>
                    <tune2fs>-i 0</tune2fs>
                </fs>
            </bylabel>
            <!-- the EFI system partition needs to be mounted at /boot/efi -->
            <bylabel>
                <label>uefi</label>
                <mountpoint>/boot/efi</mountpoint>
                <fs>
                    <type>vfat</type>
                </fs>
            </bylabel>
        </fstab>
        <install-recommends />
        <pkg-list>
            <!-- install the signed EFI version of grub -->
            <pkg>grub-efi-amd64-signed</pkg>
            <pkg>shim-signed</pkg>
            <pkg>linux-image-amd64</pkg>
        </pkg-list>
        <project-finetuning>
            <losetup img="sda.img">
                <extract_partition part="1">sda1.img</extract_partition>
                <command part="1">
                  ls $ELBE_MNT
                </command>
            </losetup>
            <set_packer packer="none">sda1.img</set_packer>
        </project-finetuning>
    </target>
</ns0:RootFileSystem>
bgermann commented 1 year ago

You added the mountpoint but not the corresponding partition. Why don't you just build the untouched example and report back? This will make things a lot easier.

coveritytest commented 1 year ago

The untouched example works fine, but I do not want sda2.img, as this partition/image would be huge. I only want sda1.img to be extracted. Isn't this possible?

bgermann commented 1 year ago

Then just delete the lines

<extract_partition part="2">sda2.img</extract_partition>
...
<set_packer packer="tarxz">sda2.img</set_packer>
bgermann commented 1 year ago

You have to have / pointing to some partition when you create images containing filesystems. Currently, there is no way around that.