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

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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: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Chuck Lever 2009-09-08 19:49:47 -04:00 committed by Trond Myklebust
parent dbab8360ed
commit 4cfd74fc99
2 changed files with 36 additions and 28 deletions
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9
fs/nfs/internal.h
View file

@ -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;

55
fs/nfs/super.c
View file

@ -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);