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Commit 6da1a034 authored by Trond Myklebust's avatar Trond Myklebust
Browse files

NFSv4: Refuse mount attempts with proto=udp 



RFC3530 disallows the use of udp as a transport protocol for NFSv4.

Signed-off-by: default avatarTrond Myklebust <Trond.Myklebust@netapp.com>
parent 9597c13b

fs/nfs/super.c

+12 −0
Original line number Diff line number Diff line
@@ -2084,6 +2084,8 @@ static int nfs_validate_text_mount_data(void *options, 
		max_namelen = NFS4_MAXNAMLEN;

		max_pathlen = NFS4_MAXPATHLEN;

		nfs_validate_transport_protocol(args);

		if (args->nfs_server.protocol == XPRT_TRANSPORT_UDP)

			goto out_invalid_transport_udp;

		nfs4_validate_mount_flags(args);

#else

		goto out_v4_not_compiled;
@@ -2106,6 +2108,10 @@ static int nfs_validate_text_mount_data(void *options, 
out_v4_not_compiled:

	dfprintk(MOUNT, "NFS: NFSv4 is not compiled into kernel\n");

	return -EPROTONOSUPPORT;

#else

out_invalid_transport_udp:

	dfprintk(MOUNT, "NFSv4: Unsupported transport protocol udp\n");

	return -EINVAL;

#endif /* !CONFIG_NFS_V4 */



out_no_address:
@@ -2711,6 +2717,8 @@ static int nfs4_validate_mount_data(void *options, 
		args->acdirmax	= data->acdirmax;

		args->nfs_server.protocol = data->proto;

		nfs_validate_transport_protocol(args);

		if (args->nfs_server.protocol == XPRT_TRANSPORT_UDP)

			goto out_invalid_transport_udp;



		break;

	default:
@@ -2731,6 +2739,10 @@ static int nfs4_validate_mount_data(void *options, 
out_no_address:

	dfprintk(MOUNT, "NFS4: mount program didn't pass remote address\n");

	return -EINVAL;



out_invalid_transport_udp:

	dfprintk(MOUNT, "NFSv4: Unsupported transport protocol udp\n");

	return -EINVAL;

}



/*