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nfs: reject version and minorversion changes on remount attempts

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Reported-by: Eric Doutreleau <edoutreleau@genoscope.cns.fr>
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Jeff Layton 2013-10-18 10:03:37 -04:00 committed by Trond Myklebust
parent 3660cd4322
commit 57acc40d73
1 changed files with 4 additions and 0 deletions
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4
fs/nfs/super.c
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@ -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);