From 2a00420addf6e920c06100d85404337d5b84231f Mon Sep 17 00:00:00 2001
From: 372046933 <372046933@users.noreply.github.com>
Date: Thu, 10 Nov 2022 17:29:30 +0800
Subject: [PATCH] Fall back to libibverbs.so.1 (#1985)

---
 docs/cn/rdma.md               |  4 ++--
 docs/en/rdma.md               |  4 ++--
 src/brpc/rdma/rdma_helper.cpp | 10 ++++++++--
 3 files changed, 12 insertions(+), 6 deletions(-)

diff --git a/docs/cn/rdma.md b/docs/cn/rdma.md
index 645b285e4a..57a1396493 100644
--- a/docs/cn/rdma.md
+++ b/docs/cn/rdma.md
@@ -24,9 +24,9 @@ make
 使用bazel:
 ```bash
 # Server
-bazel build example:rdma_performance_server
+bazel build --define=BRPC_WITH_RDMA=true example:rdma_performance_server
 # Client
-bazel build example:rdma_performance_client
+bazel build --define=BRPC_WITH_RDMA=true example:rdma_performance_client
 ```
 
 # 基本实现
diff --git a/docs/en/rdma.md b/docs/en/rdma.md
index e76a01de20..e187807fbd 100644
--- a/docs/en/rdma.md
+++ b/docs/en/rdma.md
@@ -24,9 +24,9 @@ make
 With bazel:
 ```bash
 # Server
-bazel build example:rdma_performance_server
+bazel build --define=BRPC_WITH_RDMA=true example:rdma_performance_server
 # Client
-bazel build example:rdma_performance_client
+bazel build --define=BRPC_WITH_RDMA=true example:rdma_performance_client
 ```
 
 # Basic Implementation
diff --git a/src/brpc/rdma/rdma_helper.cpp b/src/brpc/rdma/rdma_helper.cpp
index 75de2e4f9d..536398c9ac 100644
--- a/src/brpc/rdma/rdma_helper.cpp
+++ b/src/brpc/rdma/rdma_helper.cpp
@@ -326,8 +326,14 @@ static void OnRdmaAsyncEvent(Socket* m) {
 static int ReadRdmaDynamicLib() {
     g_handle_ibverbs = dlopen("libibverbs.so", RTLD_LAZY);
     if (!g_handle_ibverbs) {
-        LOG(ERROR) << "Fail to load libibverbs.so due to " << dlerror();
-        return -1;
+        LOG(WARNING) << "Failed to load libibverbs.so " << dlerror() << " try libibverbs.so.1";
+        // Clear existing error
+        dlerror();
+        g_handle_ibverbs = dlopen("libibverbs.so.1", RTLD_LAZY);
+        if (!g_handle_ibverbs) {
+            LOG(ERROR) << "Fail to load libibverbs.so.1 due to " << dlerror();
+            return -1;
+        }
     }
 
     LoadSymbol(g_handle_ibverbs, IbvGetDeviceList, "ibv_get_device_list");