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NFSD: Add tracepoints for EXCHANGEID edge cases

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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 @@ out:
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