xprtrdma: Add "reset MRs" memreg op
This method is invoked when a transport instance is about to be
reconnected. Each Memory Region object is reset to its initial
state.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Sagi Grimberg <sagig@mellanox.com>
Tested-by: Devesh Sharma <Devesh.Sharma@Emulex.Com>
Tested-by: Meghana Cheripady <Meghana.Cheripady@Emulex.Com>
Tested-by: Veeresh U. Kokatnur <veereshuk@chelsio.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
diff --git a/net/sunrpc/xprtrdma/fmr_ops.c b/net/sunrpc/xprtrdma/fmr_ops.c
index 825ce96..93261b0 100644
--- a/net/sunrpc/xprtrdma/fmr_ops.c
+++ b/net/sunrpc/xprtrdma/fmr_ops.c
@@ -146,10 +146,33 @@
return nsegs;
}
+/* After a disconnect, unmap all FMRs.
+ *
+ * This is invoked only in the transport connect worker in order
+ * to serialize with rpcrdma_register_fmr_external().
+ */
+static void
+fmr_op_reset(struct rpcrdma_xprt *r_xprt)
+{
+ struct rpcrdma_buffer *buf = &r_xprt->rx_buf;
+ struct rpcrdma_mw *r;
+ LIST_HEAD(list);
+ int rc;
+
+ list_for_each_entry(r, &buf->rb_all, mw_all)
+ list_add(&r->r.fmr->list, &list);
+
+ rc = ib_unmap_fmr(&list);
+ if (rc)
+ dprintk("RPC: %s: ib_unmap_fmr failed %i\n",
+ __func__, rc);
+}
+
const struct rpcrdma_memreg_ops rpcrdma_fmr_memreg_ops = {
.ro_map = fmr_op_map,
.ro_unmap = fmr_op_unmap,
.ro_maxpages = fmr_op_maxpages,
.ro_init = fmr_op_init,
+ .ro_reset = fmr_op_reset,
.ro_displayname = "fmr",
};