Weird priorities: priority filter, priority raw - 1, priority mangle, etc

[Mikhail Morfikov <mmorfikov@xxxxxxxxx>]

When I create the base chains I use something like 
the following:

create chain ip  mangle PREROUTING { type filter hook prerouting priority -150; policy accept; }

I set the priority via _priority -150_ , but when I'm listing rules, I get this:

table inet filter {
        chain INPUT {
                type filter hook input _priority filter_; policy drop;
...
        chain FORWARD {
                type filter hook forward _priority filter_; policy drop;
...
        chain OUTPUT {
                type filter hook output _priority filter_; policy accept;
...
table ip mangle {
        chain PREROUTING {
                type filter hook prerouting _priority mangle_; policy accept;
...
        chain INPUT {
                type filter hook input _priority mangle_; policy accept;
...
table ip raw-set {
        chain PREROUTING {
                type filter hook prerouting _priority raw - 1_; policy accept;
...
        chain OUTPUT {
                type filter hook output _priority raw - 1_; policy accept;
...

Shouldn't be there normal numbers like the ones used
when creating the rules?

Attachment: signature.asc
Description: OpenPGP digital signature