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NFSD: Add tracepoints for EXCHANGEID edge cases

Browse source 
Some of the most common cases are traced. Enough infrastructure is
now in place that more can be added later, as needed.

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 15:56:19 -04:00 committed by J. Bruce Fields
parent 237f91c85a
commit e8f80c5545
2 changed files with 10 additions and 3 deletions
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12
fs/nfsd/nfs4state.c
View file

@ -3178,6 +3178,7 @@ nfsd4_exchange_id(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
}
/* case 6 */
exid->flags |= EXCHGID4_FLAG_CONFIRMED_R;
trace_nfsd_clid_confirmed_r(conf);
goto out_copy;
}
if (!creds_match) { /* case 3 */
@ -3190,6 +3191,7 @@ nfsd4_exchange_id(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
}
if (verfs_match) { /* case 2 */
conf->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
trace_nfsd_clid_confirmed_r(conf);
goto out_copy;
}
/* case 5, client reboot */
@ -3203,11 +3205,13 @@ nfsd4_exchange_id(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
goto out;
}
unconf = find_unconfirmed_client_by_name(&exid->clname, nn);
unconf = find_unconfirmed_client_by_name(&exid->clname, nn);
if (unconf) /* case 4, possible retry or client restart */
unhash_client_locked(unconf);
/* case 1 (normal case) */
/* case 1, new owner ID */
trace_nfsd_clid_fresh(new);
out_new:
if (conf) {
status = mark_client_expired_locked(conf);
@ -3237,8 +3241,10 @@ nfsd4_exchange_id(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
out_nolock:
if (new)
expire_client(new);
if (unconf)
if (unconf) {
trace_nfsd_clid_expire_unconf(&unconf->cl_clientid);
expire_client(unconf);
}
return status;
}

1
fs/nfsd/trace.h
View file

@ -636,6 +636,7 @@ DEFINE_EVENT(nfsd_clid_class, nfsd_clid_##name, \
TP_ARGS(clp))
DEFINE_CLID_EVENT(fresh);
DEFINE_CLID_EVENT(confirmed_r);
/*
* from fs/nfsd/filecache.h