[PATCH net-next v10 4/4] Documentation/netlink/specs: tc: describe fq_pie per-flow class stats

["Hemendra M. Naik" <hemendranaik@gmail.com>]

Add the tc-fq-pie-cl-stats header for fq_pie per flow (class) stats in Documentation/netlink/specs/tc.yaml
with its five fields: prob, delay, deficit, avg-dq-rate, fq-rate-estimating.

Extend the tc-fq-pie-xstats fixed header with the type discriminator and the per-flow class_stats fields
that follow the nine legacy __u32 qdisc counters in struct tc_fq_pie_xstats.

Signed-off-by: Hemendra M. Naik <hemendranaik@gmail.com>
Signed-off-by: Vishal Kamath <vishy0777@gmail.com>
Signed-off-by: Mohit P. Tahiliani <tahiliani@nitk.edu.in>
---
 Documentation/netlink/specs/tc.yaml | 33 +++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/Documentation/netlink/specs/tc.yaml b/Documentation/netlink/specs/tc.yaml
index b6ccc645b0e3..b159c4b563c7 100644
--- a/Documentation/netlink/specs/tc.yaml
+++ b/Documentation/netlink/specs/tc.yaml
@@ -894,6 +894,30 @@ definitions:
         name: memory-limit
         type: u32
         doc: Memory limit in bytes
+  -
+    name: tc-fq-pie-cl-stats
+    type: struct
+    members:
+      -
+        name: prob
+        type: u64
+        doc: Current drop probability of the flow
+      -
+        name: delay
+        type: u32
+        doc: Current queue delay of the flow in microseconds
+      -
+        name: deficit
+        type: s32
+        doc: Number of remaining byte credits
+      -
+        name: avg-dq-rate
+        type: u32
+        doc: Current average dq_rate in bytes/second
+      -
+        name: dq-rate-estimating
+        type: u32
+        doc: Is avg-dq-rate being calculated?
   -
     name: tc-fq-pie-xstats
     type: struct
@@ -934,6 +958,15 @@ definitions:
         name: memory-usage
         type: u32
         doc: Total memory across all queues
+      -
+        name: type
+        type: u32
+        doc: TCA_FQ_PIE_XSTATS_QDISC (0) or TCA_FQ_PIE_XSTATS_CLASS (1)
+      -
+        name: class-stats
+        type: binary
+        struct: tc-fq-pie-cl-stats
+        doc: Class statistics of a particular flow (invoked via tc class show)
   -
     name: tc-fq-qd-stats
     type: struct
-- 
2.34.1