nfsv3: introduce nfs3_set_ds_client
The flexfiles layout wants to create DS connection over NFSv3.
Add nfs3_set_ds_client to allow that to happen.
Signed-off-by: Peng Tao <tao.peng@primarydata.com>
Signed-off-by: Tom Haynes <Thomas.Haynes@primarydata.com>
diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h
index 7d7c36f..7332ba1 100644
--- a/fs/nfs/internal.h
+++ b/fs/nfs/internal.h
@@ -193,6 +193,10 @@
rpc_authflavor_t au_flavor);
extern struct rpc_clnt *nfs4_find_or_create_ds_client(struct nfs_client *,
struct inode *);
+extern struct nfs_client *nfs3_set_ds_client(struct nfs_client *mds_clp,
+ const struct sockaddr *ds_addr, int ds_addrlen,
+ int ds_proto, unsigned int ds_timeo,
+ unsigned int ds_retrans, rpc_authflavor_t au_flavor);
#ifdef CONFIG_PROC_FS
extern int __init nfs_fs_proc_init(void);
extern void nfs_fs_proc_exit(void);
diff --git a/fs/nfs/nfs3_fs.h b/fs/nfs/nfs3_fs.h
index 333ae40..e134d65 100644
--- a/fs/nfs/nfs3_fs.h
+++ b/fs/nfs/nfs3_fs.h
@@ -30,5 +30,7 @@
struct nfs_server *nfs3_clone_server(struct nfs_server *, struct nfs_fh *,
struct nfs_fattr *, rpc_authflavor_t);
+/* nfs3super.c */
+extern struct nfs_subversion nfs_v3;
#endif /* __LINUX_FS_NFS_NFS3_FS_H */
diff --git a/fs/nfs/nfs3client.c b/fs/nfs/nfs3client.c
index 8c1b437..52e2344 100644
--- a/fs/nfs/nfs3client.c
+++ b/fs/nfs/nfs3client.c
@@ -64,3 +64,37 @@
nfs_init_server_aclclient(server);
return server;
}
+
+/*
+ * Set up a pNFS Data Server client over NFSv3.
+ *
+ * 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 *nfs3_set_ds_client(struct nfs_client *mds_clp,
+ const struct sockaddr *ds_addr, int ds_addrlen,
+ int ds_proto, unsigned int ds_timeo, unsigned int ds_retrans,
+ rpc_authflavor_t au_flavor)
+{
+ struct nfs_client_initdata cl_init = {
+ .addr = ds_addr,
+ .addrlen = ds_addrlen,
+ .nfs_mod = &nfs_v3,
+ .proto = ds_proto,
+ .net = mds_clp->cl_net,
+ };
+ struct rpc_timeout ds_timeout;
+ struct nfs_client *clp;
+
+ /* Use the MDS nfs_client cl_ipaddr. */
+ nfs_init_timeout_values(&ds_timeout, ds_proto, ds_timeo, ds_retrans);
+ clp = nfs_get_client(&cl_init, &ds_timeout, mds_clp->cl_ipaddr,
+ au_flavor);
+
+ return clp;
+}
+EXPORT_SYMBOL_GPL(nfs3_set_ds_client);
diff --git a/fs/nfs/nfs3super.c b/fs/nfs/nfs3super.c
index 6af29c2..5c4394e 100644
--- a/fs/nfs/nfs3super.c
+++ b/fs/nfs/nfs3super.c
@@ -7,7 +7,7 @@
#include "nfs3_fs.h"
#include "nfs.h"
-static struct nfs_subversion nfs_v3 = {
+struct nfs_subversion nfs_v3 = {
.owner = THIS_MODULE,
.nfs_fs = &nfs_fs_type,
.rpc_vers = &nfs_version3,