Re: [PATCH bpf-next v3 3/3] bpf: Add a selftest for bpf_ima_inode_hash

[KP Singh]

On Fri, Nov 27, 2020 at 5:29 AM Andrii Nakryiko
<andrii.nakryiko@xxxxxxxxx> wrote:
>
> On Tue, Nov 24, 2020 at 7:16 AM KP Singh <kpsingh@xxxxxxxxxxxx> wrote:
> >
> > From: KP Singh <kpsingh@xxxxxxxxxx>
> >

[...]

>
> > +cleanup() {
> > +        local tmp_dir="$1"
> > +        local mount_img="${tmp_dir}/test.img"
> > +        local mount_dir="${tmp_dir}/mnt"
> > +
> > +        local loop_devices=$(losetup -j ${mount_img} -O NAME --noheadings)
>
> libbpf and kernel-patches CIs are using BusyBox environment which has
> losetup that doesn't support -j option. Is there some way to work
> around that? What we have is this:
>
> BusyBox v1.31.1 () multi-call binary.
>
> Usage: losetup [-rP] [-o OFS] {-f|LOOPDEV} FILE: associate loop devices
>
>     losetup -c LOOPDEV: reread file size
>
>     losetup -d LOOPDEV: disassociate
>
>     losetup -a: show status

I can try to grep and parse the status output as a fallback. Will send another
fix.

- KP

>
>     losetup -f: show next free loop device
>
>     -o OFS    Start OFS bytes into FILE
>
>     -P    Scan for partitions
>
>     -r    Read-only
>
>     -f    Show/use next free loop device
>
>
> > +        for loop_dev in "${loop_devices}"; do

[...]