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Date: Tue, 13 Nov 2007 13:32:56 -0500
From: Chuck Lever <chuck.lever@...cle.com>
To: nfs@...ts.sourceforge.net
Cc: netdev@...r.kernel.org
Subject: [PATCH 22/25] NFS: Support non-IPv4 addresses in nfs_parsed_mount_data
Replace the nfs_server and mount_server address fields in the
nfs_parsed_mount_data structure with a "struct sockaddr_storage" and a
length, instead of a "struct sockaddr_in".
Signed-off-by: Chuck Lever <chuck.lever@...cle.com>
Cc: Aurelien Charbon <aurelien.charbon@....bull.net>
---
fs/nfs/client.c | 11 +++++-----
fs/nfs/internal.h | 6 ++++--
fs/nfs/super.c | 56 +++++++++++++++++++++++++++++++++--------------------
3 files changed, 44 insertions(+), 29 deletions(-)
diff --git a/fs/nfs/client.c b/fs/nfs/client.c
index 37b63a6..3ee0f0d 100644
--- a/fs/nfs/client.c
+++ b/fs/nfs/client.c
@@ -573,6 +573,7 @@ error:
static int nfs_init_server(struct nfs_server *server,
const struct nfs_parsed_mount_data *data)
{
+ struct sockaddr *sap = (struct sockaddr *)&data->nfs_server.address;
struct nfs_client *clp;
unsigned int nfsvers = 2;
int error;
@@ -585,10 +586,8 @@ static int nfs_init_server(struct nfs_server *server,
#endif
/* Allocate or find a client reference we can use */
- clp = nfs_get_client(data->nfs_server.hostname,
- (struct sockaddr *)&data->nfs_server.address,
- sizeof(data->nfs_server.address),
- nfsvers);
+ clp = nfs_get_client(data->nfs_server.hostname, sap,
+ data->nfs_server.addrlen, nfsvers);
if (IS_ERR(clp)) {
dprintk("<-- nfs_init_server() = error %ld\n", PTR_ERR(clp));
return PTR_ERR(clp);
@@ -985,6 +984,7 @@ static int nfs4_init_server(struct nfs_server *server,
struct nfs_server *nfs4_create_server(const struct nfs_parsed_mount_data *data,
struct nfs_fh *mntfh)
{
+ struct sockaddr *sap = (struct sockaddr *)&data->nfs_server.address;
struct nfs_fattr fattr;
struct nfs_server *server;
int error;
@@ -998,8 +998,7 @@ struct nfs_server *nfs4_create_server(const struct nfs_parsed_mount_data *data,
/* Get a client record */
error = nfs4_set_client(server,
data->nfs_server.hostname,
- (struct sockaddr *)&data->nfs_server.address,
- sizeof(data->nfs_server.address),
+ sap, data->nfs_server.addrlen,
data->client_address,
data->auth_flavors[0],
data->nfs_server.protocol,
diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h
index 40f2619..f8ccba9 100644
--- a/fs/nfs/internal.h
+++ b/fs/nfs/internal.h
@@ -44,7 +44,8 @@ struct nfs_parsed_mount_data {
char *client_address;
struct {
- struct sockaddr_in address;
+ struct sockaddr_storage address;
+ size_t addrlen;
char *hostname;
unsigned int version;
unsigned short port;
@@ -52,7 +53,8 @@ struct nfs_parsed_mount_data {
} mount_server;
struct {
- struct sockaddr_in address;
+ struct sockaddr_storage address;
+ size_t addrlen;
char *hostname;
char *export_path;
int protocol;
diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index c09c045..3ea4a4f 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -599,8 +599,10 @@ static int nfs_set_address_port(struct sockaddr *sap, unsigned short port)
/*
* Sanity-check a server address provided by the mount command
*/
-static int nfs_verify_server_address(struct sockaddr *addr)
+static int nfs_verify_server_address(struct sockaddr_storage *ssp)
{
+ struct sockaddr *addr = (struct sockaddr *)ssp;
+
switch (addr->sa_family) {
case AF_INET: {
struct sockaddr_in *sa = (struct sockaddr_in *) addr;
@@ -617,10 +619,14 @@ static int nfs_verify_server_address(struct sockaddr *addr)
* Parse string addresses passed in via a mount option.
*/
static void nfs_parse_server_address(char *value,
- struct sockaddr_in *addr)
+ struct sockaddr_storage *ssp,
+ size_t *len)
{
- addr->sin_family = AF_INET;
- addr->sin_addr.s_addr = in_aton(value);
+ struct sockaddr_in *ap = (struct sockaddr_in *)ssp;
+
+ ap->sin_family = AF_INET;
+ ap->sin_addr.s_addr = in_aton(value);
+ *len = sizeof(*ap);
}
/*
@@ -977,7 +983,8 @@ static int nfs_parse_mount_options(char *raw,
if (string == NULL)
goto out_nomem;
nfs_parse_server_address(string,
- &mnt->nfs_server.address);
+ &mnt->nfs_server.address,
+ &mnt->nfs_server.addrlen);
kfree(string);
break;
case Opt_clientaddr:
@@ -997,7 +1004,8 @@ static int nfs_parse_mount_options(char *raw,
if (string == NULL)
goto out_nomem;
nfs_parse_server_address(string,
- &mnt->mount_server.address);
+ &mnt->mount_server.address,
+ &mnt->mount_server.addrlen);
kfree(string);
break;
@@ -1059,10 +1067,11 @@ static int nfs_try_mount(struct nfs_parsed_mount_data *args,
/*
* Construct the mount server's address.
*/
- if (args->mount_server.address.sin_addr.s_addr != INADDR_ANY)
- sin = args->mount_server.address;
+ if (args->mount_server.addrlen != 0)
+ memcpy(&sin, &args->mount_server.address, sizeof(sin));
else
- sin = args->nfs_server.address;
+ memcpy(&sin, &args->nfs_server.address, sizeof(sin));
+
/*
* autobind will be used if mount_server.port == 0
*/
@@ -1158,9 +1167,6 @@ static int nfs_validate_mount_data(void *options,
memset(mntfh->data + mntfh->size, 0,
sizeof(mntfh->data) - mntfh->size);
- if (!nfs_verify_server_address((struct sockaddr *) &data->addr))
- goto out_no_address;
-
/*
* Translate to nfs_parsed_mount_data, which nfs_fill_super
* can deal with.
@@ -1175,7 +1181,13 @@ static int nfs_validate_mount_data(void *options,
args->acregmax = data->acregmax;
args->acdirmin = data->acdirmin;
args->acdirmax = data->acdirmax;
- args->nfs_server.address = data->addr;
+
+ memcpy(&args->nfs_server.address, &data->addr,
+ sizeof(data->addr));
+ args->nfs_server.addrlen = sizeof(data->addr);
+ if (!nfs_verify_server_address(&args->nfs_server.address))
+ goto out_no_address;
+
if (!(data->flags & NFS_MOUNT_TCP))
args->nfs_server.protocol = XPRT_TRANSPORT_UDP;
/* N.B. caller will free nfs_server.hostname in all cases */
@@ -1193,8 +1205,7 @@ 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(&args->nfs_server.address))
goto out_no_address;
c = strchr(dev_name, ':');
@@ -1612,6 +1623,7 @@ static int nfs4_validate_mount_data(void *options,
struct nfs_parsed_mount_data *args,
const char *dev_name)
{
+ struct sockaddr_in *ap;
struct nfs4_mount_data *data = (struct nfs4_mount_data *)options;
struct sockaddr *sap = (struct sockaddr *)&args->nfs_server.address;
char *c;
@@ -1632,15 +1644,17 @@ static int nfs4_validate_mount_data(void *options,
switch (data->version) {
case 1:
- if (data->host_addrlen != sizeof(args->nfs_server.address))
+ 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;
- if (copy_from_user(&args->nfs_server.address,
- data->host_addr,
- sizeof(args->nfs_server.address)))
+ if (copy_from_user(ap, data->host_addr, data->host_addrlen))
return -EFAULT;
+ args->nfs_server.addrlen = data->host_addrlen;
if (nfs4_default_port(sap))
goto out_no_address;
- if (!nfs_verify_server_address(sap))
+ if (!nfs_verify_server_address(&args->nfs_server.address))
goto out_no_address;
switch (data->auth_flavourlen) {
@@ -1698,7 +1712,7 @@ static int nfs4_validate_mount_data(void *options,
if (nfs4_default_port(sap))
return -EINVAL;
- if (!nfs_verify_server_address(sap))
+ if (!nfs_verify_server_address(&args->nfs_server.address))
return -EINVAL;
switch (args->auth_flavor_len) {
-
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