NFSD: Add tracepoints for SETCLIENTID edge cases
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 2e7bbaa..b6da4ab 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -3976,11 +3976,9 @@ nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
new = create_client(clname, rqstp, &clverifier);
if (new == NULL)
return nfserr_jukebox;
- /* Cases below refer to rfc 3530 section 14.2.33: */
spin_lock(&nn->client_lock);
conf = find_confirmed_client_by_name(&clname, nn);
if (conf && client_has_state(conf)) {
- /* case 0: */
status = nfserr_clid_inuse;
if (clp_used_exchangeid(conf))
goto out;
@@ -3992,7 +3990,6 @@ nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
unconf = find_unconfirmed_client_by_name(&clname, nn);
if (unconf)
unhash_client_locked(unconf);
- /* We need to handle only case 1: probable callback update */
if (conf) {
if (same_verf(&conf->cl_verifier, &clverifier)) {
copy_clid(new, conf);
@@ -4000,7 +3997,8 @@ nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
} else
trace_nfsd_clid_verf_mismatch(conf, rqstp,
&clverifier);
- }
+ } else
+ trace_nfsd_clid_fresh(new);
new->cl_minorversion = 0;
gen_callback(new, setclid, rqstp);
add_to_unconfirmed(new);
@@ -4013,12 +4011,13 @@ nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
spin_unlock(&nn->client_lock);
if (new)
free_client(new);
- if (unconf)
+ if (unconf) {
+ trace_nfsd_clid_expire_unconf(&unconf->cl_clientid);
expire_client(unconf);
+ }
return status;
}
-
__be32
nfsd4_setclientid_confirm(struct svc_rqst *rqstp,
struct nfsd4_compound_state *cstate,
@@ -4055,21 +4054,19 @@ nfsd4_setclientid_confirm(struct svc_rqst *rqstp,
trace_nfsd_clid_cred_mismatch(conf, rqstp);
goto out;
}
- /* cases below refer to rfc 3530 section 14.2.34: */
if (!unconf || !same_verf(&confirm, &unconf->cl_confirm)) {
if (conf && same_verf(&confirm, &conf->cl_confirm)) {
- /* case 2: probable retransmit */
status = nfs_ok;
- } else /* case 4: client hasn't noticed we rebooted yet? */
+ } else
status = nfserr_stale_clientid;
goto out;
}
status = nfs_ok;
- if (conf) { /* case 1: callback update */
+ if (conf) {
old = unconf;
unhash_client_locked(old);
nfsd4_change_callback(conf, &unconf->cl_cb_conn);
- } else { /* case 3: normal case; new or rebooted client */
+ } else {
old = find_confirmed_client_by_name(&unconf->cl_name, nn);
if (old) {
status = nfserr_clid_inuse;
