mirror of
https://github.com/netdata/libbpf.git
synced 2026-03-23 01:39:06 +08:00
ceba6a788a
Given that the rootfs for Arch Linux uses the busybox variant of mount(8), the `-l` doesn't exist on that binary and gives the following error msg with version v1.34.1 of busybox when invoking mkrootfs_arch.sh: ``` ... [ 0.781471] random: fast init done starting pid 72, tty '': '/etc/init.d/rcS' + for path in /etc/rcS.d/S* + '[' -x /etc/rcS.d/S10-mount ']' + /etc/rcS.d/S10-mount + /bin/mount proc /proc -t proc ++ /bin/mount -l -t devtmpfs /bin/mount: unrecognized option: l ... ``` This prevented me from generating a rootfs. This is fixed by removing the `-l`, as plainly invoking `mount -t devtmpfs` returns the same output with `mount -l ...` on the non-busybox variant (on Arch Linux, it comes from the `utils-linux` package). After this change, I was able to run `./tools/testing/selftests/bpf/vmtest.sh -i` (from the kernel src; with modification to the script to pick up my locally-generated .zstd of the new rootfs) and it worked. Signed-off-by: Chris Tarazi <tarazichris@gmail.com>
62 lines
1.1 KiB
Bash
Executable File
62 lines
1.1 KiB
Bash
Executable File
#!/bin/bash
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# This script prepares a mounted root filesystem for testing libbpf in a virtual
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# machine.
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set -e -u -x -o pipefail
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root=$1
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shift
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chroot "${root}" /bin/busybox --install
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cat > "$root/etc/inittab" << "EOF"
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::sysinit:/etc/init.d/rcS
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::ctrlaltdel:/sbin/reboot
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::shutdown:/sbin/swapoff -a
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::shutdown:/bin/umount -a -r
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::restart:/sbin/init
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EOF
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chmod 644 "$root/etc/inittab"
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mkdir -m 755 -p "$root/etc/init.d" "$root/etc/rcS.d"
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cat > "$root/etc/rcS.d/S10-mount" << "EOF"
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#!/bin/sh
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set -eux
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/bin/mount proc /proc -t proc
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# Mount devtmpfs if not mounted
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if [[ -z $(/bin/mount -t devtmpfs) ]]; then
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/bin/mount devtmpfs /dev -t devtmpfs
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fi
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/bin/mount sysfs /sys -t sysfs
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/bin/mount bpffs /sys/fs/bpf -t bpf
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/bin/mount debugfs /sys/kernel/debug -t debugfs
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echo 'Listing currently mounted file systems'
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/bin/mount
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EOF
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chmod 755 "$root/etc/rcS.d/S10-mount"
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cat > "$root/etc/rcS.d/S40-network" << "EOF"
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#!/bin/sh
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set -eux
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ip link set lo up
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EOF
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chmod 755 "$root/etc/rcS.d/S40-network"
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cat > "$root/etc/init.d/rcS" << "EOF"
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#!/bin/sh
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set -eux
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for path in /etc/rcS.d/S*; do
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[ -x "$path" ] && "$path"
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done
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EOF
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chmod 755 "$root/etc/init.d/rcS"
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chmod 755 "$root"
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