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-rw-r--r--fs/nfs/client.c131
1 files changed, 105 insertions, 26 deletions
diff --git a/fs/nfs/client.c b/fs/nfs/client.c
index bd3ca32879e7..139be9647d80 100644
--- a/fs/nfs/client.c
+++ b/fs/nfs/client.c
@@ -82,6 +82,11 @@ retry:
#endif /* CONFIG_NFS_V4 */
/*
+ * Turn off NFSv4 uid/gid mapping when using AUTH_SYS
+ */
+static int nfs4_disable_idmapping = 0;
+
+/*
* RPC cruft for NFS
*/
static struct rpc_version *nfs_version[5] = {
@@ -481,7 +486,12 @@ static struct nfs_client *nfs_match_client(const struct nfs_client_initdata *dat
* Look up a client by IP address and protocol version
* - creates a new record if one doesn't yet exist
*/
-static struct nfs_client *nfs_get_client(const struct nfs_client_initdata *cl_init)
+static struct nfs_client *
+nfs_get_client(const struct nfs_client_initdata *cl_init,
+ const struct rpc_timeout *timeparms,
+ const char *ip_addr,
+ rpc_authflavor_t authflavour,
+ int noresvport)
{
struct nfs_client *clp, *new = NULL;
int error;
@@ -512,6 +522,13 @@ install_client:
clp = new;
list_add(&clp->cl_share_link, &nfs_client_list);
spin_unlock(&nfs_client_lock);
+
+ error = cl_init->rpc_ops->init_client(clp, timeparms, ip_addr,
+ authflavour, noresvport);
+ if (error < 0) {
+ nfs_put_client(clp);
+ return ERR_PTR(error);
+ }
dprintk("--> nfs_get_client() = %p [new]\n", clp);
return clp;
@@ -767,9 +784,9 @@ static int nfs_init_server_rpcclient(struct nfs_server *server,
/*
* Initialise an NFS2 or NFS3 client
*/
-static int nfs_init_client(struct nfs_client *clp,
- const struct rpc_timeout *timeparms,
- const struct nfs_parsed_mount_data *data)
+int nfs_init_client(struct nfs_client *clp, const struct rpc_timeout *timeparms,
+ const char *ip_addr, rpc_authflavor_t authflavour,
+ int noresvport)
{
int error;
@@ -784,7 +801,7 @@ static int nfs_init_client(struct nfs_client *clp,
* - RFC 2623, sec 2.3.2
*/
error = nfs_create_rpc_client(clp, timeparms, RPC_AUTH_UNIX,
- 0, data->flags & NFS_MOUNT_NORESVPORT);
+ 0, noresvport);
if (error < 0)
goto error;
nfs_mark_client_ready(clp, NFS_CS_READY);
@@ -820,19 +837,17 @@ static int nfs_init_server(struct nfs_server *server,
cl_init.rpc_ops = &nfs_v3_clientops;
#endif
+ nfs_init_timeout_values(&timeparms, data->nfs_server.protocol,
+ data->timeo, data->retrans);
+
/* Allocate or find a client reference we can use */
- clp = nfs_get_client(&cl_init);
+ clp = nfs_get_client(&cl_init, &timeparms, NULL, RPC_AUTH_UNIX,
+ data->flags & NFS_MOUNT_NORESVPORT);
if (IS_ERR(clp)) {
dprintk("<-- nfs_init_server() = error %ld\n", PTR_ERR(clp));
return PTR_ERR(clp);
}
- nfs_init_timeout_values(&timeparms, data->nfs_server.protocol,
- data->timeo, data->retrans);
- error = nfs_init_client(clp, &timeparms, data);
- if (error < 0)
- goto error;
-
server->nfs_client = clp;
/* Initialise the client representation from the mount data */
@@ -1009,14 +1024,19 @@ static void nfs_server_insert_lists(struct nfs_server *server)
spin_lock(&nfs_client_lock);
list_add_tail_rcu(&server->client_link, &clp->cl_superblocks);
list_add_tail(&server->master_link, &nfs_volume_list);
+ clear_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state);
spin_unlock(&nfs_client_lock);
}
static void nfs_server_remove_lists(struct nfs_server *server)
{
+ struct nfs_client *clp = server->nfs_client;
+
spin_lock(&nfs_client_lock);
list_del_rcu(&server->client_link);
+ if (clp && list_empty(&clp->cl_superblocks))
+ set_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state);
list_del(&server->master_link);
spin_unlock(&nfs_client_lock);
@@ -1307,11 +1327,11 @@ static int nfs4_init_client_minor_version(struct nfs_client *clp)
/*
* Initialise an NFS4 client record
*/
-static int nfs4_init_client(struct nfs_client *clp,
- const struct rpc_timeout *timeparms,
- const char *ip_addr,
- rpc_authflavor_t authflavour,
- int flags)
+int nfs4_init_client(struct nfs_client *clp,
+ const struct rpc_timeout *timeparms,
+ const char *ip_addr,
+ rpc_authflavor_t authflavour,
+ int noresvport)
{
int error;
@@ -1325,7 +1345,7 @@ static int nfs4_init_client(struct nfs_client *clp,
clp->rpc_ops = &nfs_v4_clientops;
error = nfs_create_rpc_client(clp, timeparms, authflavour,
- 1, flags & NFS_MOUNT_NORESVPORT);
+ 1, noresvport);
if (error < 0)
goto error;
strlcpy(clp->cl_ipaddr, ip_addr, sizeof(clp->cl_ipaddr));
@@ -1378,27 +1398,71 @@ static int nfs4_set_client(struct nfs_server *server,
dprintk("--> nfs4_set_client()\n");
/* Allocate or find a client reference we can use */
- clp = nfs_get_client(&cl_init);
+ clp = nfs_get_client(&cl_init, timeparms, ip_addr, authflavour,
+ server->flags & NFS_MOUNT_NORESVPORT);
if (IS_ERR(clp)) {
error = PTR_ERR(clp);
goto error;
}
- error = nfs4_init_client(clp, timeparms, ip_addr, authflavour,
- server->flags);
- if (error < 0)
- goto error_put;
+
+ /*
+ * Query for the lease time on clientid setup or renewal
+ *
+ * Note that this will be set on nfs_clients that were created
+ * only for the DS role and did not set this bit, but now will
+ * serve a dual role.
+ */
+ set_bit(NFS_CS_CHECK_LEASE_TIME, &clp->cl_res_state);
server->nfs_client = clp;
dprintk("<-- nfs4_set_client() = 0 [new %p]\n", clp);
return 0;
-
-error_put:
- nfs_put_client(clp);
error:
dprintk("<-- nfs4_set_client() = xerror %d\n", error);
return error;
}
+/*
+ * Set up a pNFS Data Server client.
+ *
+ * Return any existing nfs_client that matches server address,port,version
+ * and minorversion.
+ *
+ * For a new nfs_client, use a soft mount (default), a low retrans and a
+ * low timeout interval so that if a connection is lost, we retry through
+ * the MDS.
+ */
+struct nfs_client *nfs4_set_ds_client(struct nfs_client* mds_clp,
+ const struct sockaddr *ds_addr,
+ int ds_addrlen, int ds_proto)
+{
+ struct nfs_client_initdata cl_init = {
+ .addr = ds_addr,
+ .addrlen = ds_addrlen,
+ .rpc_ops = &nfs_v4_clientops,
+ .proto = ds_proto,
+ .minorversion = mds_clp->cl_minorversion,
+ };
+ struct rpc_timeout ds_timeout = {
+ .to_initval = 15 * HZ,
+ .to_maxval = 15 * HZ,
+ .to_retries = 1,
+ .to_exponential = 1,
+ };
+ struct nfs_client *clp;
+
+ /*
+ * Set an authflavor equual to the MDS value. Use the MDS nfs_client
+ * cl_ipaddr so as to use the same EXCHANGE_ID co_ownerid as the MDS
+ * (section 13.1 RFC 5661).
+ */
+ clp = nfs_get_client(&cl_init, &ds_timeout, mds_clp->cl_ipaddr,
+ mds_clp->cl_rpcclient->cl_auth->au_flavor, 0);
+
+ dprintk("<-- %s %p\n", __func__, clp);
+ return clp;
+}
+EXPORT_SYMBOL(nfs4_set_ds_client);
/*
* Session has been established, and the client marked ready.
@@ -1435,6 +1499,10 @@ static int nfs4_server_common_setup(struct nfs_server *server,
BUG_ON(!server->nfs_client->rpc_ops);
BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops);
+ /* data servers support only a subset of NFSv4.1 */
+ if (is_ds_only_client(server->nfs_client))
+ return -EPROTONOSUPPORT;
+
fattr = nfs_alloc_fattr();
if (fattr == NULL)
return -ENOMEM;
@@ -1504,6 +1572,13 @@ static int nfs4_init_server(struct nfs_server *server,
if (error < 0)
goto error;
+ /*
+ * Don't use NFS uid/gid mapping if we're using AUTH_SYS or lower
+ * authentication.
+ */
+ if (nfs4_disable_idmapping && data->auth_flavors[0] == RPC_AUTH_UNIX)
+ server->caps |= NFS_CAP_UIDGID_NOMAP;
+
if (data->rsize)
server->rsize = nfs_block_size(data->rsize, NULL);
if (data->wsize)
@@ -1921,3 +1996,7 @@ void nfs_fs_proc_exit(void)
}
#endif /* CONFIG_PROC_FS */
+
+module_param(nfs4_disable_idmapping, bool, 0644);
+MODULE_PARM_DESC(nfs4_disable_idmapping,
+ "Turn off NFSv4 idmapping when using 'sec=sys'");