Commit 4cfd74fc authored by Chuck Lever's avatar Chuck Lever Committed by Trond Myklebust
Browse files

NFS: Mount option parser should detect missing "port=" 



The meaning of not specifying the "port=" mount option is different
for "-t nfs" and "-t nfs4" mounts.  The default port value for
NFSv2/v3 mounts is 0, but the default for NFSv4 mounts is 2049.

To support "-t nfs -o vers=4", the mount option parser must detect
when "port=" is missing so that the correct default port value can be
set depending on which NFS version is requested.

Signed-off-by: default avatarChuck Lever <chuck.lever@oracle.com>
Signed-off-by: default avatarTrond Myklebust <Trond.Myklebust@netapp.com>
parent dbab8360

fs/nfs/internal.h

+7 −2
Original line number Diff line number Diff line
@@ -48,6 +48,11 @@ struct nfs_clone_mount { 
 */

#define NFS_MAX_SECFLAVORS	(12)



/*

 * Value used if the user did not specify a port value.

 */

#define NFS_UNSPEC_PORT		(-1)



/*

 * In-kernel mount arguments

 */
@@ -71,7 +76,7 @@ struct nfs_parsed_mount_data { 
		size_t			addrlen;

		char			*hostname;

		u32			version;

		unsigned short		port;

		int			port;

		unsigned short		protocol;

	} mount_server;
@@ -80,7 +85,7 @@ struct nfs_parsed_mount_data { 
		size_t			addrlen;

		char			*hostname;

		char			*export_path;

		unsigned short		port;

		int			port;

		unsigned short		protocol;

	} nfs_server;

fs/nfs/super.c

+29 −26
Original line number Diff line number Diff line
@@ -746,6 +746,21 @@ static int nfs_verify_server_address(struct sockaddr *addr) 
	return 0;

}



/*

 * Select between a default port value and a user-specified port value.

 * If a zero value is set, then autobind will be used.

 */

static void nfs_set_default_port(struct sockaddr *sap, const int parsed_port,

				 const unsigned short default_port)

{

	unsigned short port = default_port;



	if (parsed_port != NFS_UNSPEC_PORT)

		port = parsed_port;



	rpc_set_port(sap, port);

}



/*

 * Sanity check the NFS transport protocol.

 *
@@ -1415,11 +1430,7 @@ static int nfs_try_mount(struct nfs_parsed_mount_data *args, 
		args->mount_server.addrlen = args->nfs_server.addrlen;

	}

	request.salen = args->mount_server.addrlen;



	/*

	 * autobind will be used if mount_server.port == 0

	 */

	rpc_set_port(request.sap, args->mount_server.port);

	nfs_set_default_port(request.sap, args->mount_server.port, 0);



	/*

	 * Now ask the mount server to map our export path
@@ -1597,6 +1608,7 @@ static int nfs_validate_mount_data(void *options, 
				   const char *dev_name)

{

	struct nfs_mount_data *data = (struct nfs_mount_data *)options;

	struct sockaddr *sap = (struct sockaddr *)&args->nfs_server.address;



	if (data == NULL)

		goto out_no_data;
@@ -1608,8 +1620,8 @@ static int nfs_validate_mount_data(void *options, 
	args->acregmax		= NFS_DEF_ACREGMAX;

	args->acdirmin		= NFS_DEF_ACDIRMIN;

	args->acdirmax		= NFS_DEF_ACDIRMAX;

	args->mount_server.port	= 0;	/* autobind unless user sets port */

	args->nfs_server.port	= 0;	/* autobind unless user sets port */

	args->mount_server.port	= NFS_UNSPEC_PORT;

	args->nfs_server.port	= NFS_UNSPEC_PORT;

	args->nfs_server.protocol = XPRT_TRANSPORT_TCP;

	args->auth_flavors[0]	= RPC_AUTH_UNIX;

	args->auth_flavor_len	= 1;
@@ -1657,11 +1669,9 @@ static int nfs_validate_mount_data(void *options, 
		args->acdirmin		= data->acdirmin;

		args->acdirmax		= data->acdirmax;



		memcpy(&args->nfs_server.address, &data->addr,

		       sizeof(data->addr));

		memcpy(sap, &data->addr, sizeof(data->addr));

		args->nfs_server.addrlen = sizeof(data->addr);

		if (!nfs_verify_server_address((struct sockaddr *)

						&args->nfs_server.address))

		if (!nfs_verify_server_address(sap))

			goto out_no_address;



		if (!(data->flags & NFS_MOUNT_TCP))
@@ -1709,12 +1719,10 @@ static int nfs_validate_mount_data(void *options, 
		if (nfs_parse_mount_options((char *)options, args) == 0)

			return -EINVAL;



		if (!nfs_verify_server_address((struct sockaddr *)

						&args->nfs_server.address))

		if (!nfs_verify_server_address(sap))

			goto out_no_address;



		rpc_set_port((struct sockaddr *)&args->nfs_server.address,

				args->nfs_server.port);

		nfs_set_default_port(sap, args->nfs_server.port, 0);



		nfs_set_mount_transport_protocol(args);
@@ -2261,7 +2269,7 @@ static int nfs4_validate_mount_data(void *options, 
				    struct nfs_parsed_mount_data *args,

				    const char *dev_name)

{

	struct sockaddr_in *ap;

	struct sockaddr *sap = (struct sockaddr *)&args->nfs_server.address;

	struct nfs4_mount_data *data = (struct nfs4_mount_data *)options;

	char *c;
@@ -2274,23 +2282,21 @@ static int nfs4_validate_mount_data(void *options, 
	args->acregmax		= NFS_DEF_ACREGMAX;

	args->acdirmin		= NFS_DEF_ACDIRMIN;

	args->acdirmax		= NFS_DEF_ACDIRMAX;

	args->nfs_server.port	= NFS_PORT; /* 2049 unless user set port= */

	args->nfs_server.port	= NFS_UNSPEC_PORT;

	args->auth_flavors[0]	= RPC_AUTH_UNIX;

	args->auth_flavor_len	= 1;

	args->minorversion	= 0;



	switch (data->version) {

	case 1:

		ap = (struct sockaddr_in *)&args->nfs_server.address;

		if (data->host_addrlen > sizeof(args->nfs_server.address))

			goto out_no_address;

		if (data->host_addrlen == 0)

			goto out_no_address;

		args->nfs_server.addrlen = data->host_addrlen;

		if (copy_from_user(ap, data->host_addr, data->host_addrlen))

		if (copy_from_user(sap, data->host_addr, data->host_addrlen))

			return -EFAULT;

		if (!nfs_verify_server_address((struct sockaddr *)

						&args->nfs_server.address))

		if (!nfs_verify_server_address(sap))

			goto out_no_address;



		if (data->auth_flavourlen) {
@@ -2342,12 +2348,9 @@ static int nfs4_validate_mount_data(void *options, 
		if (nfs_parse_mount_options((char *)options, args) == 0)

			return -EINVAL;



		if (!nfs_verify_server_address((struct sockaddr *)

						&args->nfs_server.address))

		if (!nfs_verify_server_address(sap))

			return -EINVAL;



		rpc_set_port((struct sockaddr *)&args->nfs_server.address,

				args->nfs_server.port);

		nfs_set_default_port(sap, args->nfs_server.port, NFS_PORT);



		nfs_validate_transport_protocol(args);

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