Add support similar to getaddrinfo AI_NUMERICHOST. This
indicates that lengthy address resolution protocols should
not be used. Also allow a caller of rdma_getaddrinfo to
indicate that lengthy route resolution protocols should not
be used.
Since rdma_getaddrinfo is a synchronous call, this allows a
user to obtain locally available data only without long
delays that may block an application thread. Callers can then
use the asynchronous librdmacm calls to complete any missing
information.
Signed-off-by: Sean Hefty <sean.he...@intel.com>
---
include/rdma/rdma_cma.h | 2 ++
man/rdma_getaddrinfo.3 | 5 +++++
src/acm.c | 2 ++
src/addrinfo.c | 3 ++-
4 files changed, 11 insertions(+), 1 deletions(-)
diff --git a/include/rdma/rdma_cma.h b/include/rdma/rdma_cma.h
index d17ef88..b48cd2e
--- a/include/rdma/rdma_cma.h
+++ b/include/rdma/rdma_cma.h
@@ -165,6 +165,8 @@ struct rdma_cm_event {
};
#define RAI_PASSIVE 0x00000001
+#define RAI_NUMERICHOST 0x00000002
+#define RAI_NOROUTE 0x00000004
struct rdma_addrinfo {
int ai_flags;
diff --git a/man/rdma_getaddrinfo.3 b/man/rdma_getaddrinfo.3
index c418b5a..e69d8ce
--- a/man/rdma_getaddrinfo.3
+++ b/man/rdma_getaddrinfo.3
@@ -38,6 +38,11 @@ Hint flags that control the operation. Supported flags are:
.IP "RAI_PASSIVE" 12
Indicates that the results will be used on the passive/listening
side of a connection.
+.IP "RAI_NUMERICHOST" 12
+If specified, then the node parameter, if provided, must be a numerical
+network address. This flag suppresses any lengthy address resolution.
+.IP "RAI_NOROUTE" 12
+If set, this flag suppresses any lengthy route resolution.
.IP "ai_family" 12
Address family for the source and destination address. Supported families
are: AF_INET, AF_INET6, and AF_IB.
diff --git a/src/acm.c b/src/acm.c
index e2d02b4..1fa6c62 100755
--- a/src/acm.c
+++ b/src/acm.c
@@ -292,6 +292,8 @@ void ucma_ib_resolve(struct rdma_addrinfo *rai, struct
rdma_addrinfo *hints)
if (rai->ai_dst_len) {
data->flags = ACM_EP_FLAG_DEST;
+ if (rai->ai_flags & (RAI_NUMERICHOST | RAI_NOROUTE))
+ data->flags |= ACM_FLAGS_NODELAY;
ucma_copy_rai_addr(data, rai->ai_dst_addr);
data++;
msg.hdr.length += ACM_MSG_EP_LENGTH;
diff --git a/src/addrinfo.c b/src/addrinfo.c
index a1cb8a5..021f7c4 100755
--- a/src/addrinfo.c
+++ b/src/addrinfo.c
@@ -48,7 +48,8 @@
static void ucma_convert_to_ai(struct addrinfo *ai, struct rdma_addrinfo *rai)
{
memset(ai, 0, sizeof *ai);
- ai->ai_flags = (rai->ai_flags & RAI_PASSIVE) ? AI_PASSIVE : 0;
+ ai->ai_flags = (rai->ai_flags & RAI_PASSIVE) ? AI_PASSIVE : 0;
+ ai->ai_flags |= (rai->ai_flags & RAI_NUMERICHOST) ? AI_NUMERICHOST : 0;
ai->ai_family = rai->ai_family;
switch (rai->ai_qp_type) {
--
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