From 9a9b2157aafd2c5fec9f40b9f3c31edea9c01f95 Mon Sep 17 00:00:00 2001
From: Tobias Klausmann <klausman@users.noreply.github.com>
Date: Fri, 22 Sep 2023 15:09:32 +0200
Subject: [PATCH] NFSd: handle new wdeleg_getattr attribute in
 /proc/net/rpc/nfsd (#574)

This attribute was introduced it v6.6-rc1.

Signed-off-by: Tobias Klausmann <klausman@schwarzvogel.de>
---
 nfs/nfs.go             |  1 +
 nfs/parse_nfsd.go      |  2 ++
 nfs/parse_nfsd_test.go | 15 ++++++++++++---
 3 files changed, 15 insertions(+), 3 deletions(-)

diff --git a/nfs/nfs.go b/nfs/nfs.go
index ebc059836..f17fa5105 100644
--- a/nfs/nfs.go
+++ b/nfs/nfs.go
@@ -275,6 +275,7 @@ type ServerRPCStats struct {
 	V3Stats        V3Stats
 	ServerV4Stats  ServerV4Stats
 	V4Ops          V4Ops
+	WdelegGetattr  uint64
 }
 
 // FS represents the pseudo-filesystem proc, which provides an interface to
diff --git a/nfs/parse_nfsd.go b/nfs/parse_nfsd.go
index 857ae3b96..66828e5ee 100644
--- a/nfs/parse_nfsd.go
+++ b/nfs/parse_nfsd.go
@@ -73,6 +73,8 @@ func ParseServerRPCStats(r io.Reader) (*ServerRPCStats, error) {
 			stats.ServerV4Stats, err = parseServerV4Stats(values)
 		case "proc4ops":
 			stats.V4Ops, err = parseV4Ops(values)
+		case "wdeleg_getattr":
+			stats.WdelegGetattr = values[0]
 		default:
 			return nil, fmt.Errorf("unknown NFSd metric line %q", metricLine)
 		}
diff --git a/nfs/parse_nfsd_test.go b/nfs/parse_nfsd_test.go
index 0d9d94ca6..a7e96895a 100644
--- a/nfs/parse_nfsd_test.go
+++ b/nfs/parse_nfsd_test.go
@@ -45,6 +45,7 @@ proc2 18 2 69 0 0 4410 0 0 0 0 0 0 0 0 0 0 0 99 2
 proc3 22 2 112 0 2719 111 0 0 0 0 0 0 0 0 0 0 0 27 216 0 2 1 0
 proc4 2 2 10853
 proc4ops 72 0 0 0 1098 2 0 0 0 0 8179 5896 0 0 0 0 5900 0 0 2 0 2 0 9609 0 2 150 1272 0 0 0 1236 0 0 0 0 3 3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
+wdeleg_getattr 16
 `,
 			stats: &nfs.ServerRPCStats{
 				ReplyCache: nfs.ReplyCache{
@@ -175,6 +176,7 @@ proc4ops 72 0 0 0 1098 2 0 0 0 0 8179 5896 0 0 0 0 5900 0 0 2 0 2 0 9609 0 2 150
 					Write:              0,
 					RelLockOwner:       0,
 				},
+				WdelegGetattr: 16,
 			},
 		}, {
 			name: "good file, proc4ops 40",
@@ -188,7 +190,9 @@ rpc 44177753 0 0 0 0
 proc2 18 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
 proc3 22 747 7259760 1383711 1570520 3464939 8436 4688207 21668847 1173194 6457 2127 172 213538 1253 556401 14950 1101 56245 90790 742 367 1989658
 proc4 2 0 0
-proc4ops 40 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0`,
+proc4ops 40 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
+wdeleg_getattr 9`,
+
 			stats: &nfs.ServerRPCStats{
 				ReplyCache: nfs.ReplyCache{
 					Hits:    0,
@@ -318,6 +322,7 @@ proc4ops 40 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
 					Write:              0,
 					RelLockOwner:       0,
 				},
+				WdelegGetattr: 9,
 			},
 		},
 		{
@@ -332,7 +337,8 @@ rpc 742406 310 310 0 0
 proc2 18 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
 proc3 22 105 71158 0 175642 184711 17103 101277 0 0 0 0 0 0 0 0 0 0 8916 102 202 0 0
 proc4 2 101 182991
-proc4ops 59 0 0 0 18112 8341 0 0 0 3239 71595 11834 0 0 0 0 107097 0 0 8344 0 5100 0 181968 0 235 5735 4406 0 0 0 652 8342 8344 0 0 134 134 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0`,
+proc4ops 59 0 0 0 18112 8341 0 0 0 3239 71595 11834 0 0 0 0 107097 0 0 8344 0 5100 0 181968 0 235 5735 4406 0 0 0 652 8342 8344 0 0 134 134 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
+wdeleg_getattr 10`,
 			stats: &nfs.ServerRPCStats{
 				ReplyCache: nfs.ReplyCache{
 					Hits:    0,
@@ -462,6 +468,7 @@ proc4ops 59 0 0 0 18112 8341 0 0 0 3239 71595 11834 0 0 0 0 107097 0 0 8344 0 51
 					Write:              0,
 					RelLockOwner:       0,
 				},
+				WdelegGetattr: 10,
 			},
 		}, {
 			name: "good file, proc4ops 39",
@@ -475,7 +482,8 @@ rpc 44177753 0 0 0 0
 proc2 18 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
 proc3 22 747 7259760 1383711 1570520 3464939 8436 4688207 21668847 1173194 6457 2127 172 213538 1253 556401 14950 1101 56245 90790 742 367 1989658
 proc4 2 0 0
-proc4ops 39 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 39`,
+proc4ops 39 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 39
+wdeleg_getattr 765432`,
 			stats: &nfs.ServerRPCStats{
 				ReplyCache: nfs.ReplyCache{
 					Hits:    0,
@@ -605,6 +613,7 @@ proc4ops 39 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
 					Write:              39,
 					RelLockOwner:       0,
 				},
+				WdelegGetattr: 765432,
 			},
 		},
 	}