NFSv4: Iterate through all nfs_clients when the server recalls a delegation
The same delegation may have been handed out to more than one nfs_client.
Ensure that if a recall occurs, we return all instances.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/fs/nfs/client.c b/fs/nfs/client.c
index 7a15832..685c43f 100644
--- a/fs/nfs/client.c
+++ b/fs/nfs/client.c
@@ -276,6 +276,41 @@
}
/*
+ * Find a client by IP address and protocol version
+ * - returns NULL if no such client
+ */
+struct nfs_client *nfs_find_client_next(struct nfs_client *clp)
+{
+ struct sockaddr *sap = (struct sockaddr *)&clp->cl_addr;
+ u32 nfsvers = clp->rpc_ops->version;
+
+ spin_lock(&nfs_client_lock);
+ list_for_each_entry_continue(clp, &nfs_client_list, cl_share_link) {
+ struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr;
+
+ /* Don't match clients that failed to initialise properly */
+ if (clp->cl_cons_state != NFS_CS_READY)
+ continue;
+
+ /* Different NFS versions cannot share the same nfs_client */
+ if (clp->rpc_ops->version != nfsvers)
+ continue;
+
+ if (sap->sa_family != clap->sa_family)
+ continue;
+ /* Match only the IP address, not the port number */
+ if (!nfs_sockaddr_match_ipaddr(sap, clap))
+ continue;
+
+ atomic_inc(&clp->cl_count);
+ spin_unlock(&nfs_client_lock);
+ return clp;
+ }
+ spin_unlock(&nfs_client_lock);
+ return NULL;
+}
+
+/*
* Find an nfs_client on the list that matches the initialisation data
* that is supplied.
*/
