Add check during initialization to determine if the kernel
supports AF_IB.
Signed-off-by: Sean Hefty <[email protected]>
---
src/cma.c | 27 +++++++++++++++++++++++++++
1 files changed, 27 insertions(+), 0 deletions(-)
diff --git a/src/cma.c b/src/cma.c
index faf4264..66a7643 100644
--- a/src/cma.c
+++ b/src/cma.c
@@ -195,6 +195,32 @@ static int check_abi_version(void)
return 0;
}
+/*
+ * This function is called holding the mutex lock
+ * cma_dev_cnt must be set before calling this function to
+ * ensure that the lock is not acquired recursively.
+ */
+static void ucma_set_af_ib_support(void)
+{
+ struct rdma_cm_id *id;
+ struct sockaddr_ib sib;
+ int ret;
+
+ ret = rdma_create_id(NULL, &id, NULL, RDMA_PS_IB);
+ if (ret)
+ return;
+
+ memset(&sib, 0, sizeof sib);
+ sib.sib_family = AF_IB;
+ sib.sib_sid = htonll(RDMA_IB_IP_PS_TCP);
+ sib.sib_sid_mask = htonll(RDMA_IB_IP_PS_MASK);
+ af_ib_support = 1;
+ ret = rdma_bind_addr(id, (struct sockaddr *) &sib);
+ af_ib_support = !ret;
+
+ rdma_destroy_id(id);
+}
+
int ucma_init(void)
{
struct ibv_device **dev_list = NULL;
@@ -263,6 +289,7 @@ int ucma_init(void)
if (ib)
ucma_ib_init();
cma_dev_cnt = dev_cnt;
+ ucma_set_af_ib_support();
pthread_mutex_unlock(&mut);
ibv_free_device_list(dev_list);
return 0;
--
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