xprtrdma: Add "destroy MRs" memreg op

Memory Region objects associated with a transport instance are
destroyed before the instance is shutdown and destroyed.

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>

1 files changed, 18 insertions, 0 deletions

diff --git a/net/sunrpc/xprtrdma/fmr_ops.c b/net/sunrpc/xprtrdma/fmr_ops.c
index 93261b05891e..e9ca5944ac1e 100644
--- a/net/sunrpc/xprtrdma/fmr_ops.c
+++ b/net/sunrpc/xprtrdma/fmr_ops.c
@@ -168,11 +168,29 @@ fmr_op_reset(struct rpcrdma_xprt *r_xprt)
                         __func__, rc);
 }
 
+static void
+fmr_op_destroy(struct rpcrdma_buffer *buf)
+{
+        struct rpcrdma_mw *r;
+        int rc;
+
+        while (!list_empty(&buf->rb_all)) {
+                r = list_entry(buf->rb_all.next, struct rpcrdma_mw, mw_all);
+                list_del(&r->mw_all);
+                rc = ib_dealloc_fmr(r->r.fmr);
+                if (rc)
+                        dprintk("RPC:       %s: ib_dealloc_fmr failed %i\n",
+                                __func__, rc);
+                kfree(r);
+        }
+}
+
 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_destroy                     = fmr_op_destroy,
         .ro_displayname                 = "fmr",
 };