nfsd4: support BIND_CONN_TO_SESSION
Basic xdr and processing for BIND_CONN_TO_SESSION. This adds a
connection to the list of connections associated with a session.
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 3cf9900..956174f 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -679,15 +679,12 @@
return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user);
}
-static __be32 nfsd4_new_conn(struct svc_rqst *rqstp, struct nfsd4_session *ses)
+static __be32 nfsd4_new_conn(struct svc_rqst *rqstp, struct nfsd4_session *ses, u32 dir)
{
struct nfsd4_conn *conn;
- u32 flags = NFS4_CDFC4_FORE;
int ret;
- if (ses->se_flags & SESSION4_BACK_CHAN)
- flags |= NFS4_CDFC4_BACK;
- conn = alloc_conn(rqstp, flags);
+ conn = alloc_conn(rqstp, dir);
if (!conn)
return nfserr_jukebox;
nfsd4_hash_conn(conn, ses);
@@ -698,6 +695,17 @@
return nfs_ok;
}
+static __be32 nfsd4_new_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_session *ses)
+{
+ u32 dir = NFS4_CDFC4_FORE;
+
+ if (ses->se_flags & SESSION4_BACK_CHAN)
+ dir |= NFS4_CDFC4_BACK;
+
+ return nfsd4_new_conn(rqstp, ses, dir);
+}
+
+/* must be called under client_lock */
static void nfsd4_del_conns(struct nfsd4_session *s)
{
struct nfs4_client *clp = s->se_client;
@@ -776,7 +784,7 @@
spin_unlock(&clp->cl_lock);
spin_unlock(&client_lock);
- status = nfsd4_new_conn(rqstp, new);
+ status = nfsd4_new_conn_from_crses(rqstp, new);
/* whoops: benny points out, status is ignored! (err, or bogus) */
if (status) {
free_session(&new->se_ref);
@@ -1597,6 +1605,45 @@
return argp->opcnt == resp->opcnt;
}
+static __be32 nfsd4_map_bcts_dir(u32 *dir)
+{
+ switch (*dir) {
+ case NFS4_CDFC4_FORE:
+ case NFS4_CDFC4_BACK:
+ return nfs_ok;
+ case NFS4_CDFC4_FORE_OR_BOTH:
+ case NFS4_CDFC4_BACK_OR_BOTH:
+ *dir = NFS4_CDFC4_BOTH;
+ return nfs_ok;
+ };
+ return nfserr_inval;
+}
+
+__be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp,
+ struct nfsd4_compound_state *cstate,
+ struct nfsd4_bind_conn_to_session *bcts)
+{
+ __be32 status;
+
+ if (!nfsd4_last_compound_op(rqstp))
+ return nfserr_not_only_op;
+ spin_lock(&client_lock);
+ cstate->session = find_in_sessionid_hashtbl(&bcts->sessionid);
+ /* Sorta weird: we only need the refcnt'ing because new_conn acquires
+ * client_lock iself: */
+ if (cstate->session) {
+ nfsd4_get_session(cstate->session);
+ atomic_inc(&cstate->session->se_client->cl_refcount);
+ }
+ spin_unlock(&client_lock);
+ if (!cstate->session)
+ return nfserr_badsession;
+
+ status = nfsd4_map_bcts_dir(&bcts->dir);
+ nfsd4_new_conn(rqstp, cstate->session, bcts->dir);
+ return nfs_ok;
+}
+
static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid)
{
if (!session)