Commit 57acc40d authored by Jeff Layton's avatar Jeff Layton Committed by Trond Myklebust
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nfs: reject version and minorversion changes on remount attempts 



Reported-by: default avatarEric Doutreleau <edoutreleau@genoscope.cns.fr>
Signed-off-by: default avatarJeff Layton <jlayton@redhat.com>
Signed-off-by: default avatarTrond Myklebust <Trond.Myklebust@netapp.com>
parent 3660cd43

fs/nfs/super.c

+4 −0
Original line number Diff line number Diff line
@@ -2143,6 +2143,8 @@ nfs_compare_remount_data(struct nfs_server *nfss, 
	if (data->flags != nfss->flags ||

	    data->rsize != nfss->rsize ||

	    data->wsize != nfss->wsize ||

	    data->version != nfss->nfs_client->rpc_ops->version ||

	    data->minorversion != nfss->nfs_client->cl_minorversion ||

	    data->retrans != nfss->client->cl_timeout->to_retries ||

	    data->auth_flavors[0] != nfss->client->cl_auth->au_flavor ||

	    data->acregmin != nfss->acregmin / HZ ||
@@ -2197,6 +2199,8 @@ nfs_remount(struct super_block *sb, int *flags, char *raw_data) 
	data->timeo = 10U * nfss->client->cl_timeout->to_initval / HZ;

	data->nfs_server.port = nfss->port;

	data->nfs_server.addrlen = nfss->nfs_client->cl_addrlen;

	data->version = nfsvers;

	data->minorversion = nfss->nfs_client->cl_minorversion;

	memcpy(&data->nfs_server.address, &nfss->nfs_client->cl_addr,

		data->nfs_server.addrlen);