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---
selftests/vsock: prepare vm management helpers for namespaces
This commit adds namespace support to VM management helpers and wrapper
functions, requiring callers to explicitly pass "init_ns" for the init
namespace. The commit message states "No functional changes for existing
tests. All have been updated to pass 'init_ns' explicitly."
> diff --git a/tools/testing/selftests/vsock/vmtest.sh
> b/tools/testing/selftests/vsock/vmtest.sh
> index c2bdc293b94c..1d03acb62347 100755
> --- a/tools/testing/selftests/vsock/vmtest.sh
> +++ b/tools/testing/selftests/vsock/vmtest.sh
> @@ -135,7 +135,18 @@ del_namespaces() {
> }
>
> vm_ssh() {
> - ssh -q -o UserKnownHostsFile=/dev/null -p ${SSH_HOST_PORT} localhost
> "$@"
> + local ns_exec
> +
> + if [[ "${1}" == init_ns ]]; then
> + ns_exec=""
> + else
> + ns_exec="ip netns exec ${1}"
> + fi
> +
> + shift
> +
> + ${ns_exec} ssh -q -o UserKnownHostsFile=/dev/null -p "${SSH_HOST_PORT}"
> localhost "$@"
> +
> return $?
> }
The vm_ssh() function now expects a namespace as its first argument, but
run_shared_vm_test() still calls vm_ssh without this parameter:
vm_oops_cnt_before=$(vm_ssh -- dmesg | grep -c -i 'Oops')
vm_warn_cnt_before=$(vm_ssh -- dmesg --level=warn | grep -c -i 'vsock')
vm_oops_cnt_after=$(vm_ssh -- dmesg | grep -i 'Oops' | wc -l)
vm_warn_cnt_after=$(vm_ssh -- dmesg --level=warn | grep -c -i 'vsock')
When called as "vm_ssh -- dmesg", the "--" is interpreted as the namespace
argument. Since "--" does not equal "init_ns", the function sets
ns_exec="ip netns exec --" which is invalid. The shift then consumes "--"
and the command becomes "ip netns exec -- ssh ... dmesg" which will fail.
Interestingly, the v9 version of this patch on lore correctly updated these
calls to pass "init_ns", but this change appears to have been lost between
v9 and v15. The fix for this regression is present later in the series in
commit 3ae984505e00 ("selftests/vsock: add vm_dmesg_{warn,oops}_count()
helpers").
[ ... ]
