[PATCH] libibverbs: Expose the get neighbor timeout for dmac resolution

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This allows the neighbor timeout to be configured while building
rdma-core using the extra cmake flags.

Reviewed-by: Jorgen Hansen <jhansen@xxxxxxxxxx>
Reviewed-by: Vishnu Dasa <vdasa@xxxxxxxxxx>
Signed-off-by: Adit Ranadive <aditr@xxxxxxxxxx>
---
 CMakeLists.txt       | 6 ++++++
 buildlib/config.h.in | 2 ++
 libibverbs/verbs.c   | 1 -
 3 files changed, 8 insertions(+), 1 deletion(-)
---

Here is the PR:
https://github.com/linux-rdma/rdma-core/pull/524

---
diff --git a/CMakeLists.txt b/CMakeLists.txt
index beb8f4ec1238..8dbdd2b807f4 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -45,6 +45,8 @@
 #   -DNO_PYVERBS=1 (default, build pyverbs)
 #      Invoke cython to build pyverbs. Usually you will run with this option
 #      is set, but it will be disabled for travis runs.
+#   -DNEIGH_GET_DEFAULT_TIMEOUT_MS=3000 (default)
+#      Set the default timeout for lookup of neighbor for mac address.
 
 cmake_minimum_required(VERSION 2.8.11 FATAL_ERROR)
 project(rdma-core C)
@@ -84,6 +86,10 @@ if (IN_PLACE)
   set(CMAKE_INSTALL_INCLUDEDIR "include")
 endif()
 
+if ("${NEIGH_GET_DEFAULT_TIMEOUT_MS}" STREQUAL "")
+  set(NEIGH_GET_DEFAULT_TIMEOUT_MS 3000)
+endif()
+
 include(GNUInstallDirs)
 # C include root
 set(BUILD_INCLUDE ${CMAKE_BINARY_DIR}/include)
diff --git a/buildlib/config.h.in b/buildlib/config.h.in
index 0754d2494234..590e70162d1e 100644
--- a/buildlib/config.h.in
+++ b/buildlib/config.h.in
@@ -61,6 +61,8 @@
 # define VERBS_WRITE_ONLY 0
 #endif
 
+# define NEIGH_GET_DEFAULT_TIMEOUT_MS @NEIGH_GET_DEFAULT_TIMEOUT_MS@
+
 // Configuration defaults
 
 #define IBACM_SERVER_MODE_UNIX 0
diff --git a/libibverbs/verbs.c b/libibverbs/verbs.c
index 1766b9f52d31..2cab86184e32 100644
--- a/libibverbs/verbs.c
+++ b/libibverbs/verbs.c
@@ -967,7 +967,6 @@ static inline int create_peer_from_gid(int family, void *raw_gid,
 	return 0;
 }
 
-#define NEIGH_GET_DEFAULT_TIMEOUT_MS 3000
 int ibv_resolve_eth_l2_from_gid(struct ibv_context *context,
 				struct ibv_ah_attr *attr,
 				uint8_t eth_mac[ETHERNET_LL_SIZE],
-- 
2.17.1





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