nfs41: pull nfs4_ds_connect from file layout to generic pnfs
It can be reused by flexfiles layout client.
Reviewed-by: Jeff Layton <jlayton@primarydata.com>
Signed-off-by: Peng Tao <tao.peng@primarydata.com>
Signed-off-by: Tom Haynes <Thomas.Haynes@primarydata.com>
diff --git a/fs/nfs/pnfs_nfs.c b/fs/nfs/pnfs_nfs.c
index 81ec449..5a92e76 100644
--- a/fs/nfs/pnfs_nfs.c
+++ b/fs/nfs/pnfs_nfs.c
@@ -11,6 +11,7 @@
#include <linux/nfs_page.h>
#include <linux/sunrpc/addr.h>
+#include "nfs4session.h"
#include "internal.h"
#include "pnfs.h"
@@ -534,6 +535,86 @@
}
EXPORT_SYMBOL_GPL(nfs4_pnfs_ds_add);
+static void nfs4_wait_ds_connect(struct nfs4_pnfs_ds *ds)
+{
+ might_sleep();
+ wait_on_bit(&ds->ds_state, NFS4DS_CONNECTING,
+ TASK_KILLABLE);
+}
+
+static void nfs4_clear_ds_conn_bit(struct nfs4_pnfs_ds *ds)
+{
+ smp_mb__before_atomic();
+ clear_bit(NFS4DS_CONNECTING, &ds->ds_state);
+ smp_mb__after_atomic();
+ wake_up_bit(&ds->ds_state, NFS4DS_CONNECTING);
+}
+
+static int _nfs4_pnfs_ds_connect(struct nfs_server *mds_srv,
+ struct nfs4_pnfs_ds *ds,
+ unsigned int timeo,
+ unsigned int retrans)
+{
+ struct nfs_client *clp = ERR_PTR(-EIO);
+ struct nfs4_pnfs_ds_addr *da;
+ int status = 0;
+
+ dprintk("--> %s DS %s au_flavor %d\n", __func__, ds->ds_remotestr,
+ mds_srv->nfs_client->cl_rpcclient->cl_auth->au_flavor);
+
+ list_for_each_entry(da, &ds->ds_addrs, da_node) {
+ dprintk("%s: DS %s: trying address %s\n",
+ __func__, ds->ds_remotestr, da->da_remotestr);
+
+ clp = nfs4_set_ds_client(mds_srv->nfs_client,
+ (struct sockaddr *)&da->da_addr,
+ da->da_addrlen, IPPROTO_TCP,
+ timeo, retrans);
+ if (!IS_ERR(clp))
+ break;
+ }
+
+ if (IS_ERR(clp)) {
+ status = PTR_ERR(clp);
+ goto out;
+ }
+
+ status = nfs4_init_ds_session(clp, mds_srv->nfs_client->cl_lease_time);
+ if (status)
+ goto out_put;
+
+ smp_wmb();
+ ds->ds_clp = clp;
+ dprintk("%s [new] addr: %s\n", __func__, ds->ds_remotestr);
+out:
+ return status;
+out_put:
+ nfs_put_client(clp);
+ goto out;
+}
+
+/*
+ * Create an rpc connection to the nfs4_pnfs_ds data server.
+ * Currently only supports IPv4 and IPv6 addresses.
+ * If connection fails, make devid unavailable.
+ */
+void nfs4_pnfs_ds_connect(struct nfs_server *mds_srv, struct nfs4_pnfs_ds *ds,
+ struct nfs4_deviceid_node *devid, unsigned int timeo,
+ unsigned int retrans)
+{
+ if (test_and_set_bit(NFS4DS_CONNECTING, &ds->ds_state) == 0) {
+ int err = 0;
+
+ err = _nfs4_pnfs_ds_connect(mds_srv, ds, timeo, retrans);
+ if (err)
+ nfs4_mark_deviceid_unavailable(devid);
+ nfs4_clear_ds_conn_bit(ds);
+ } else {
+ nfs4_wait_ds_connect(ds);
+ }
+}
+EXPORT_SYMBOL_GPL(nfs4_pnfs_ds_connect);
+
/*
* Currently only supports ipv4, ipv6 and one multi-path address.
*/