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NFSD: Add cb_lost tracepoint

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Provide more clarity about when the callback channel is in trouble.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
Chuck Lever 2021-05-14 15:56:43 -04:00 committed by J. Bruce Fields
parent 167145cc64
commit 806d65b617
2 changed files with 3 additions and 0 deletions
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2
fs/nfsd/nfs4state.c
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@ -1745,6 +1745,8 @@ 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);

1
fs/nfsd/trace.h
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@ -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);