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nfsd4: fix error return in non-matching-creds case

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Note CLID_INUSE is for the case where two clients are trying to use the
same client-provided long-form client identifiers.  But what we're
looking at here is the server-returned shorthand client id--if those
clash there's a bug somewhere.

Fix the error return, pull the check out into common code, and do the
check unconditionally in all cases.

Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
J. Bruce Fields 2012-05-19 10:05:58 -04:00
parent 788c1eba50
commit 8695b90ac3
1 changed files with 26 additions and 36 deletions
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62
fs/nfsd/nfs4state.c
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@ -2229,59 +2229,49 @@ nfsd4_setclientid_confirm(struct svc_rqst *rqstp,
if (STALE_CLIENTID(clid))
return nfserr_stale_clientid;
/*
* XXX The Duplicate Request Cache (DRC) has been checked (??)
* We get here on a DRC miss.
*/
nfs4_lock_state();
conf = find_confirmed_client(clid);
unconf = find_unconfirmed_client(clid);
/*
* We try hard to give out unique clientid's, so if we get an
* attempt to confirm the same clientid with a different cred,
* there's a bug somewhere. Let's charitably assume it's our
* bug.
*/
status = nfserr_serverfault;
if (unconf && !same_creds(&unconf->cl_cred, &rqstp->rq_cred))
goto out;
if (conf && !same_creds(&conf->cl_cred, &rqstp->rq_cred))
goto out;
/* cases below refer to rfc 3530 section 14.2.34: */
status = nfserr_clid_inuse;
if (conf && unconf && same_verf(&confirm, &unconf->cl_confirm)) {
/* case 1: callback update */
if (!same_creds(&conf->cl_cred, &rqstp->rq_cred))
status = nfserr_clid_inuse;
else {
nfsd4_change_callback(conf, &unconf->cl_cb_conn);
nfsd4_probe_callback(conf);
expire_client(unconf);
status = nfs_ok;
}
nfsd4_change_callback(conf, &unconf->cl_cb_conn);
nfsd4_probe_callback(conf);
expire_client(unconf);
status = nfs_ok;
} else if (conf && !unconf) {
/* case 2: probable retransmit: */
if (!same_creds(&conf->cl_cred, &rqstp->rq_cred))
status = nfserr_clid_inuse;
else
status = nfs_ok;
status = nfs_ok;
} else if (!conf && unconf
&& same_verf(&unconf->cl_confirm, &confirm)) {
/* case 3: normal case; new or rebooted client */
if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred)) {
status = nfserr_clid_inuse;
} else {
unsigned int hash =
clientstr_hashval(unconf->cl_recdir);
conf = find_confirmed_client_by_str(unconf->cl_recdir,
hash);
if (conf) {
nfsd4_client_record_remove(conf);
expire_client(conf);
}
move_to_confirmed(unconf);
conf = unconf;
nfsd4_probe_callback(conf);
status = nfs_ok;
unsigned int hash = clientstr_hashval(unconf->cl_recdir);
conf = find_confirmed_client_by_str(unconf->cl_recdir, hash);
if (conf) {
nfsd4_client_record_remove(conf);
expire_client(conf);
}
move_to_confirmed(unconf);
conf = unconf;
nfsd4_probe_callback(conf);
status = nfs_ok;
} else if ((!conf || !same_verf(&conf->cl_confirm, &confirm))
&& (!unconf || !same_verf(&unconf->cl_confirm, &confirm))) {
/* case 4: client hasn't noticed we rebooted yet? */
status = nfserr_stale_clientid;
}
out:
nfs4_unlock_state();
return status;
}