nfsd4: exchange_id cleanup: comments
Make these comments a bit more concise and uniform.
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 3b6d610..93fcf53 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -1550,6 +1550,7 @@
strhashval = clientstr_hashval(dname);
+ /* Cases below refer to rfc 5661 section 18.35.4: */
nfs4_lock_state();
conf = find_confirmed_client_by_str(dname, strhashval);
if (conf) {
@@ -1557,26 +1558,24 @@
bool verfs_match = same_verf(&verf, &conf->cl_verifier);
if (!clp_used_exchangeid(conf)) {
- if (update) {
- status = nfserr_inval; /* buggy client */
+ if (update) { /* buggy client */
+ status = nfserr_inval;
goto out;
}
}
- if (!creds_match) {
- /* 18.35.4 case 9 */
+ if (!creds_match) { /* case 9 */
if (update)
status = nfserr_perm;
else /* case 3 */
status = nfserr_clid_inuse;
goto out;
}
- if (!verfs_match) {
- /* 18.35.4 case 8 */
+ if (!verfs_match) { /* case 8 */
if (update) {
status = nfserr_not_same;
goto out;
}
- /* Client reboot: destroy old state */
+ /* case 5, client reboot */
expire_client(conf);
goto out_new;
}
@@ -1584,38 +1583,23 @@
status = nfserr_inval;
goto out;
}
- /*
- * Set bit when the owner id and verifier map to an already
- * confirmed client id (18.35.3).
- */
+ /* case 2 */
exid->flags |= EXCHGID4_FLAG_CONFIRMED_R;
-
- /*
- * Falling into 18.35.4 case 2, possible router replay.
- * Leave confirmed record intact and return same result.
- */
new = conf;
goto out_copy;
}
- /* 18.35.4 case 7 */
- if (update) {
+ if (update) { /* case 7 */
status = nfserr_noent;
goto out;
}
unconf = find_unconfirmed_client_by_str(dname, strhashval);
- if (unconf) {
- /*
- * Possible retry or client restart. Per 18.35.4 case 4,
- * a new unconfirmed record should be generated regardless
- * of whether any properties have changed.
- */
+ if (unconf) /* case 4, possible retry or client restart */
expire_client(unconf);
- }
+ /* case 1 (normal case) */
out_new:
- /* Normal case */
new = create_client(exid->clname, dname, rqstp, &verf);
if (new == NULL) {
status = nfserr_jukebox;