[PATCH] knfsd: nfsd4: fix setclientid_confirm cases

Setclientid_confirm code confused states 1 and 3 (numbering from the
IMPLEMENTATION section of rfc3530, section 14.2.33).  Fix this.

State 1 allows the client to change the callback channel on the fly.  We don't
implement this currently, so just turn off the callback channel in this case.

From: Fred Isaman
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Signed-off-by: Neil Brown <neilb@cse.unsw.edu.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 15 insertions, 4 deletions

diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 67a038dc0d0e..997343c23043 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -887,10 +887,14 @@ nfsd4_setclientid_confirm(struct svc_rqst *rqstp, struct nfsd4_setclientid_confi
                 if (!cmp_creds(&conf->cl_cred, &unconf->cl_cred)) 
                         status = nfserr_clid_inuse;
                 else {
-                        expire_client(conf);
-                        clp = unconf;
-                        move_to_confirmed(unconf);
+                        /* XXX: We just turn off callbacks until we can handle
+                          * change request correctly. */
+                        clp = conf;
+                        clp->cl_callback.cb_parsed = 0;
+                        gen_confirm(clp);
+                        expire_client(unconf);
                         status = nfs_ok;
+
                 }
                 goto out;
         } 
@@ -920,9 +924,16 @@ nfsd4_setclientid_confirm(struct svc_rqst *rqstp, struct nfsd4_setclientid_confi
                 if (!cmp_creds(&unconf->cl_cred, &rqstp->rq_cred)) {
                         status = nfserr_clid_inuse;
                 } else {
-                        status = nfs_ok;
+                        unsigned int hash =
+                                clientstr_hashval(unconf->cl_recdir);
+                        conf = find_confirmed_client_by_str(unconf->cl_recdir,
+                                                                        hash);
+                        if (conf) {
+                                expire_client(conf);
+                        }
                         clp = unconf;
                         move_to_confirmed(unconf);
+                        status = nfs_ok;
                 }
                 goto out;
         }