doc/netlink/specs: Add bond support to rt_link.yaml

Add bond support to rt_link.yaml. Here is an example output:

 $ ./tools/net/ynl/cli.py --spec Documentation/netlink/specs/rt_link.yaml \
   --do getlink --json '{"ifname": "bond0"}' --output-json | jq '.linkinfo'
 {
   "kind": "bond",
   "data": {
     "mode": 4,
     "miimon": 100,
     ...
     "arp-interval": 0,
     "arp-ip-target": [
       "192.168.1.1",
       "192.168.1.2"
     ],
     "arp-validate": 0,
     "arp-all-targets": 0,
     "ns-ip6-target": [
       "2001::1",
       "2001::2"
     ],
     "primary-reselect": 0,
     ...
     "missed-max": 2,
     "ad-info": {
       "aggregator": 1,
       "num-ports": 1,
       "actor-key": 0,
       "partner-key": 1,
       "partner-mac": "00:00:00:00:00:00"
     }
   }
 }

And here is the downlink info.

 $ ./tools/net/ynl/cli.py --spec Documentation/netlink/specs/rt_link.yaml \
   --do getlink --json '{"ifname": "dummy0"}' --output-json | jq '.linkinfo'
 {
   "kind": "dummy",
   "slave-kind": "bond",
   "slave-data": {
     "state": 0,
     "mii-status": 0,
     "link-failure-count": 0,
     "perm-hwaddr": "f2:82:f7:cc:47:13",
     "queue-id": 0,
     "prio": 0
   }
 }
Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
Link: https://lore.kernel.org/r/20240409083504.3900877-1-liuhangbin@gmail.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Documentation/netlink/specs/rt_link.yaml

@@ -1035,6 +1035,165 @@ attribute-sets:
         type: sub-message
         sub-message: linkinfo-member-data-msg
         selector: slave-kind
+  -
+    name: linkinfo-bond-attrs
+    name-prefix: ifla-bond-
+    attributes:
+      -
+        name: mode
+        type: u8
+      -
+        name: active-slave
+        type: u32
+      -
+        name: miimon
+        type: u32
+      -
+        name: updelay
+        type: u32
+      -
+        name: downdelay
+        type: u32
+      -
+        name: use-carrier
+        type: u8
+      -
+        name: arp-interval
+        type: u32
+      -
+        name: arp-ip-target
+        type: indexed-array
+        sub-type: u32
+        byte-order: big-endian
+        display-hint: ipv4
+      -
+        name: arp-validate
+        type: u32
+      -
+        name: arp-all-targets
+        type: u32
+      -
+        name: primary
+        type: u32
+      -
+        name: primary-reselect
+        type: u8
+      -
+        name: fail-over-mac
+        type: u8
+      -
+        name: xmit-hash-policy
+        type: u8
+      -
+        name: resend-igmp
+        type: u32
+      -
+        name: num-peer-notif
+        type: u8
+      -
+        name: all-slaves-active
+        type: u8
+      -
+        name: min-links
+        type: u32
+      -
+        name: lp-interval
+        type: u32
+      -
+        name: packets-per-slave
+        type: u32
+      -
+        name: ad-lacp-rate
+        type: u8
+      -
+        name: ad-select
+        type: u8
+      -
+        name: ad-info
+        type: nest
+        nested-attributes: bond-ad-info-attrs
+      -
+        name: ad-actor-sys-prio
+        type: u16
+      -
+        name: ad-user-port-key
+        type: u16
+      -
+        name: ad-actor-system
+        type: binary
+        display-hint: mac
+      -
+        name: tlb-dynamic-lb
+        type: u8
+      -
+        name: peer-notif-delay
+        type: u32
+      -
+        name: ad-lacp-active
+        type: u8
+      -
+        name: missed-max
+        type: u8
+      -
+        name: ns-ip6-target
+        type: indexed-array
+        sub-type: binary
+        display-hint: ipv6
+      -
+        name: coupled-control
+        type: u8
+  -
+    name: bond-ad-info-attrs
+    name-prefix: ifla-bond-ad-info-
+    attributes:
+      -
+        name: aggregator
+        type: u16
+      -
+        name: num-ports
+        type: u16
+      -
+        name: actor-key
+        type: u16
+      -
+        name: partner-key
+        type: u16
+      -
+        name: partner-mac
+        type: binary
+        display-hint: mac
+  -
+    name: bond-slave-attrs
+    name-prefix: ifla-bond-slave-
+    attributes:
+      -
+        name: state
+        type: u8
+      -
+        name: mii-status
+        type: u8
+      -
+        name: link-failure-count
+        type: u32
+      -
+        name: perm-hwaddr
+        type: binary
+        display-hint: mac
+      -
+        name: queue-id
+        type: u16
+      -
+        name: ad-aggregator-id
+        type: u16
+      -
+        name: ad-actor-oper-port-state
+        type: u8
+      -
+        name: ad-partner-oper-port-state
+        type: u16
+      -
+        name: prio
+        type: u32
   -
     name: linkinfo-bridge-attrs
     name-prefix: ifla-br-
@@ -1716,6 +1875,9 @@ sub-messages:
   -
     name: linkinfo-data-msg
     formats:
+      -
+        value: bond
+        attribute-set: linkinfo-bond-attrs
       -
         value: bridge
         attribute-set: linkinfo-bridge-attrs
@@ -1754,6 +1916,7 @@ sub-messages:
         attribute-set: linkinfo-brport-attrs
       -
         value: bond
+        attribute-set: bond-slave-attrs
 
 operations:
   enum-model: directional