NFS: eliminate NIPQUAD(clp->cl_addr.sin_addr)

To ensure the NFS client displays IPv6 addresses properly, replace
address family-specific NIPQUAD() invocations with a call to the RPC
client to get a formatted string representing the remote peer's
address.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Cc: Aurelien Charbon <aurelien.charbon@ext.bull.net>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

fs/nfs/client.c

@@ -1279,10 +1279,10 @@ static int nfs_server_list_show(struct seq_file *m, void *v)
 	/* display one transport per line on subsequent lines */
 	clp = list_entry(v, struct nfs_client, cl_share_link);
 
-	seq_printf(m, "v%u %02x%02x%02x%02x %4hx %3d %s\n",
+	seq_printf(m, "v%u %s %s %3d %s\n",
 		   clp->rpc_ops->version,
-		   NIPQUAD(clp->cl_addr.sin_addr),
-		   ntohs(clp->cl_addr.sin_port),
+		   rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR),
+		   rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT),
 		   atomic_read(&clp->cl_count),
 		   clp->cl_hostname);
 
@@ -1358,10 +1358,10 @@ static int nfs_volume_list_show(struct seq_file *m, void *v)
 		 (unsigned long long) server->fsid.major,
 		 (unsigned long long) server->fsid.minor);
 
-	seq_printf(m, "v%u %02x%02x%02x%02x %4hx %-7s %-17s\n",
+	seq_printf(m, "v%u %s %s %-7s %-17s\n",
 		   clp->rpc_ops->version,
-		   NIPQUAD(clp->cl_addr.sin_addr),
-		   ntohs(clp->cl_addr.sin_port),
+		   rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR),
+		   rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT),
 		   dev,
 		   fsid);
 

fs/nfs/delegation.c

@@ -156,8 +156,9 @@ int nfs_inode_set_delegation(struct inode *inode, struct rpc_cred *cred, struct
 		if (memcmp(&delegation->stateid, &nfsi->delegation->stateid,
 					sizeof(delegation->stateid)) != 0 ||
 				delegation->type != nfsi->delegation->type) {
-			printk("%s: server %u.%u.%u.%u, handed out a duplicate delegation!\n",
-					__FUNCTION__, NIPQUAD(clp->cl_addr.sin_addr));
+			printk(KERN_WARNING "%s: server %s handed out "
+					"a duplicate delegation!\n",
+					__FUNCTION__, clp->cl_hostname);
 			status = -EIO;
 		}
 	}
@@ -314,8 +315,9 @@ void nfs_expire_all_delegations(struct nfs_client *clp)
 	__module_get(THIS_MODULE);
 	atomic_inc(&clp->cl_count);
 	task = kthread_run(nfs_do_expire_all_delegations, clp,
-			"%u.%u.%u.%u-delegreturn",
-			NIPQUAD(clp->cl_addr.sin_addr));
+				"%s-delegreturn",
+				rpc_peeraddr2str(clp->cl_rpcclient,
+							RPC_DISPLAY_ADDR));
 	if (!IS_ERR(task))
 		return;
 	nfs_put_client(clp);

fs/nfs/nfs4state.c

@@ -758,8 +758,9 @@ static void nfs4_recover_state(struct nfs_client *clp)
 
 	__module_get(THIS_MODULE);
 	atomic_inc(&clp->cl_count);
-	task = kthread_run(reclaimer, clp, "%u.%u.%u.%u-reclaim",
-			NIPQUAD(clp->cl_addr.sin_addr));
+	task = kthread_run(reclaimer, clp, "%s-reclaim",
+				rpc_peeraddr2str(clp->cl_rpcclient,
+							RPC_DISPLAY_ADDR));
 	if (!IS_ERR(task))
 		return;
 	nfs4_clear_recover_bit(clp);
@@ -970,8 +971,8 @@ out:
 	module_put_and_exit(0);
 	return 0;
 out_error:
-	printk(KERN_WARNING "Error: state recovery failed on NFSv4 server %u.%u.%u.%u with error %d\n",
-				NIPQUAD(clp->cl_addr.sin_addr), -status);
+	printk(KERN_WARNING "Error: state recovery failed on NFSv4 server %s"
+			" with error %d\n", clp->cl_hostname, -status);
 	set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
 	goto out;
 }

fs/nfs/super.c

@@ -491,8 +491,9 @@ static int nfs_show_options(struct seq_file *m, struct vfsmount *mnt)
 
 	nfs_show_mount_options(m, nfss, 0);
 
-	seq_printf(m, ",addr="NIPQUAD_FMT,
-		NIPQUAD(nfss->nfs_client->cl_addr.sin_addr));
+	seq_printf(m, ",addr=%s",
+			rpc_peeraddr2str(nfss->nfs_client->cl_rpcclient,
+							RPC_DISPLAY_ADDR));
 
 	return 0;
 }