This is a note to let you know that I've just added the patch titled
NFSD: Add cb_lost tracepoint
to the 5.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
nfsd-add-cb_lost-tracepoint.patch
and it can be found in the queue-5.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 049acefdfa1b4f4ce76b9dd885c3664dae389485
Author: Chuck Lever <chuck.lever@xxxxxxxxxx>
Date: Fri May 14 15:56:43 2021 -0400
NFSD: Add cb_lost tracepoint
[ Upstream commit 806d65b617d89be887fe68bfa051f78143669cd7 ]
Provide more clarity about when the callback channel is in trouble.
Signed-off-by: Chuck Lever <chuck.lever@xxxxxxxxxx>
Signed-off-by: J. Bruce Fields <bfields@xxxxxxxxxx>
Signed-off-by: Chuck Lever <chuck.lever@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index adf476cbf36c3..a8aa3680605bb 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -1763,6 +1763,8 @@ static void nfsd4_conn_lost(struct svc_xpt_user *u)
struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user);
struct nfs4_client *clp = c->cn_session->se_client;
+ trace_nfsd_cb_lost(clp);
+
spin_lock(&clp->cl_lock);
if (!list_empty(&c->cn_persession)) {
list_del(&c->cn_persession);
diff --git a/fs/nfsd/trace.h b/fs/nfsd/trace.h
index 3683076e0fcd3..afffb4912acbc 100644
--- a/fs/nfsd/trace.h
+++ b/fs/nfsd/trace.h
@@ -912,6 +912,7 @@ DEFINE_EVENT(nfsd_cb_class, nfsd_cb_##name, \
DEFINE_NFSD_CB_EVENT(setup);
DEFINE_NFSD_CB_EVENT(state);
+DEFINE_NFSD_CB_EVENT(lost);
DEFINE_NFSD_CB_EVENT(shutdown);
TRACE_DEFINE_ENUM(RPC_AUTH_NULL);
