[PATCH v4 4/4] NFSD: add trace point to track when write delegation is granted

[Dai Ngo <dai.ngo@xxxxxxxxxx>]

Add trace point to track whether read or write delegation is granted.

Signed-off-by: Dai Ngo <dai.ngo@xxxxxxxxxx>
---
 fs/nfsd/nfs4state.c | 8 +++++---
 fs/nfsd/trace.h     | 1 +
 2 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 3f98b7485c72..b90b74a5e66e 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -5621,11 +5621,13 @@ nfs4_open_delegation(struct nfsd4_open *open, struct nfs4_ol_stateid *stp,
 
 	memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid));
 
-	trace_nfsd_deleg_read(&dp->dl_stid.sc_stateid);
-	if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
+	if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) {
 		open->op_delegate_type = NFS4_OPEN_DELEGATE_WRITE;
-	else
+		trace_nfsd_deleg_write(&dp->dl_stid.sc_stateid);
+	} else {
 		open->op_delegate_type = NFS4_OPEN_DELEGATE_READ;
+		trace_nfsd_deleg_read(&dp->dl_stid.sc_stateid);
+	}
 	nfs4_put_stid(&dp->dl_stid);
 	return;
 out_no_deleg:
diff --git a/fs/nfsd/trace.h b/fs/nfsd/trace.h
index 4183819ea082..a14cf8684255 100644
--- a/fs/nfsd/trace.h
+++ b/fs/nfsd/trace.h
@@ -607,6 +607,7 @@ DEFINE_STATEID_EVENT(layout_recall_release);
 
 DEFINE_STATEID_EVENT(open);
 DEFINE_STATEID_EVENT(deleg_read);
+DEFINE_STATEID_EVENT(deleg_write);
 DEFINE_STATEID_EVENT(deleg_return);
 DEFINE_STATEID_EVENT(deleg_recall);
 
-- 
2.9.5