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Re: [Qemu-devel] [PATCH] rdma: bug fixes


From: Michael R. Hines
Subject: Re: [Qemu-devel] [PATCH] rdma: bug fixes
Date: Thu, 12 Jun 2014 17:12:41 +0800
User-agent: Mozilla/5.0 (X11; Linux i686; rv:24.0) Gecko/20100101 Thunderbird/24.5.0

On 02/18/2014 10:34 AM, address@hidden wrote:
From: "Michael R. Hines" <address@hidden>

1. Fix small memory leak in parsing inet address from command line in 
data_init()
2. Fix ibv_post_send() return value check and pass error code back up correctly.
3. Fix rdma_destroy_qp() segfault after failure to connect to destination.

Reported-by: address@hidden
Reported-by: address@hidden
Signed-off-by: Michael R. Hines <address@hidden>
---
  migration-rdma.c | 20 ++++++++++----------
  1 file changed, 10 insertions(+), 10 deletions(-)

diff --git a/migration-rdma.c b/migration-rdma.c
index f94f3b4..29351a6 100644
--- a/migration-rdma.c
+++ b/migration-rdma.c
@@ -1589,13 +1589,11 @@ static int qemu_rdma_post_send_control(RDMAContext 
*rdma, uint8_t *buf,
      }


-    if (ibv_post_send(rdma->qp, &send_wr, &bad_wr)) {
-        return -1;
-    }
+    ret = ibv_post_send(rdma->qp, &send_wr, &bad_wr);

-    if (ret < 0) {
+    if (ret > 0) {
          fprintf(stderr, "Failed to use post IB SEND for control!\n");
-        return ret;
+        return -ret;
      }

      ret = qemu_rdma_block_for_wrid(rdma, RDMA_WRID_SEND_CONTROL, NULL);
@@ -2237,10 +2235,6 @@ static void qemu_rdma_cleanup(RDMAContext *rdma)
          }
      }

-    if (rdma->qp) {
-        rdma_destroy_qp(rdma->cm_id);
-        rdma->qp = NULL;
-    }
      if (rdma->cq) {
          ibv_destroy_cq(rdma->cq);
          rdma->cq = NULL;
@@ -2258,6 +2252,10 @@ static void qemu_rdma_cleanup(RDMAContext *rdma)
          rdma->listen_id = NULL;
      }
      if (rdma->cm_id) {
+        if (rdma->qp) {
+            rdma_destroy_qp(rdma->cm_id);
+            rdma->qp = NULL;
+        }
          rdma_destroy_id(rdma->cm_id);
          rdma->cm_id = NULL;
      }
@@ -2512,8 +2510,10 @@ static void *qemu_rdma_data_init(const char *host_port, 
Error **errp)
          } else {
              ERROR(errp, "bad RDMA migration address '%s'", host_port);
              g_free(rdma);
-            return NULL;
+            rdma = NULL;
          }
+
+        qapi_free_InetSocketAddress(addr);
      }

      return rdma;

Juan? Ping again?

- Michael




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