NFS: cache parsed auth_info in nfs_server

Cache the auth_info structure in nfs_server and pass these values to submounts.

This lays the groundwork for supporting multiple sec= options.
Signed-off-by: NWeston Andros Adamson <dros@netapp.com>
Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>

fs/nfs/client.c

@@ -786,6 +786,7 @@ static int nfs_init_server(struct nfs_server *server,
 		goto error;
 
 	server->port = data->nfs_server.port;
+	server->auth_info = data->auth_info;
 
 	error = nfs_init_server_rpcclient(server, &timeparms,
 					  data->selected_flavor);
@@ -929,6 +930,7 @@ void nfs_server_copy_userdata(struct nfs_server *target, struct nfs_server *sour
 	target->acdirmax = source->acdirmax;
 	target->caps = source->caps;
 	target->options = source->options;
+	target->auth_info = source->auth_info;
 }
 EXPORT_SYMBOL_GPL(nfs_server_copy_userdata);
 

fs/nfs/nfs4client.c

@@ -962,6 +962,7 @@ static int nfs4_init_server(struct nfs_server *server,
 	/* Initialise the client representation from the mount data */
 	server->flags = data->flags;
 	server->options = data->options;
+	server->auth_info = data->auth_info;
 
 	if (data->auth_info.flavor_len >= 1)
 		data->selected_flavor = data->auth_info.flavors[0];

fs/nfs/super.c

@@ -2187,8 +2187,7 @@ nfs_remount(struct super_block *sb, int *flags, char *raw_data)
 	data->wsize = nfss->wsize;
 	data->retrans = nfss->client->cl_timeout->to_retries;
 	data->selected_flavor = nfss->client->cl_auth->au_flavor;
-	data->auth_info.flavors[0] = nfss->client->cl_auth->au_flavor;
-	data->auth_info.flavor_len = 1;
+	data->auth_info = nfss->auth_info;
 	data->acregmin = nfss->acregmin / HZ;
 	data->acregmax = nfss->acregmax / HZ;
 	data->acdirmin = nfss->acdirmin / HZ;

include/linux/nfs_fs_sb.h

@@ -151,6 +151,7 @@ struct nfs_server {
 	unsigned long		mount_time;	/* when this fs was mounted */
 	struct super_block	*super;		/* VFS super block */
 	dev_t			s_dev;		/* superblock dev numbers */
+	struct nfs_auth_info	auth_info;	/* parsed auth flavors */
 
 #ifdef CONFIG_NFS_FSCACHE
 	struct nfs_fscache_key	*fscache_key;	/* unique key for superblock */