[PATCH librdmacm 2/3] acm: Define needed ACM protocol messages

[sean.hefty-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org]

From: Sean Hefty <sean.hefty-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>

The librdmacm needs message definitions used to communicate
with the ibacm.  It currently pulls these from infiniband/acm.h,
which is installed by ibacm.  This creates an install order
dependency on ibacm.  However, work on the scalable SA has
the ibacm using the librdmacm (via rsockets) for communication
between the different SSA components.

To resolve this issue, have the librdmacm define the message
structures that it needs to communicate with ibacm.  The
librdmacm already defines some ACM messages through configuration
checks.  We just expand that capability, which isolates the librdmacm
package from the ibacm package.

Signed-off-by: Sean Hefty <sean.hefty-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
---
 configure.ac |    7 +-----
 src/acm.c    |   70 ++++++++++++++++++++++++++++++++++++++++++++++++++-------
 2 files changed, 62 insertions(+), 15 deletions(-)

diff --git a/configure.ac b/configure.ac
index 31b1a0e..b4303c6 100644
--- a/configure.ac
+++ b/configure.ac
@@ -71,12 +71,7 @@ fi
 fi
 
 AC_CHECK_HEADER(infiniband/acm.h, 
-	AC_DEFINE([USE_IB_ACM], 1, [setting IBACM support]), [])
-
-AC_CHECK_HEADER(infiniband/acm.h,
-	AC_CHECK_MEMBER(struct acm_msg.resolve_data, [],
-		AC_DEFINE(DEFINE_ACM_MSG, 1, [adding ACM message definition]),
-			[#include <infiniband/acm.h>]), [])
+      AC_DEFINE([USE_IB_ACM], 1, [setting IBACM support]), [])
 
 dnl Checks close on exec support
 AC_CHECK_HEADERS([fcntl.h sys/socket.h])
diff --git a/src/acm.c b/src/acm.c
index 6e8e173..09c5d4e 100644
--- a/src/acm.c
+++ b/src/acm.c
@@ -46,19 +46,71 @@
 #include <infiniband/sa.h>
 
 #ifdef USE_IB_ACM
-#include <infiniband/acm.h>
+#define ACM_VERSION             1
+
+#define ACM_OP_RESOLVE          0x01
+#define ACM_OP_ACK              0x80
+
+#define ACM_STATUS_SUCCESS      0
+#define ACM_STATUS_ENOMEM       1
+#define ACM_STATUS_EINVAL       2
+#define ACM_STATUS_ENODATA      3
+#define ACM_STATUS_ENOTCONN     5
+#define ACM_STATUS_ETIMEDOUT    6
+#define ACM_STATUS_ESRCADDR     7
+#define ACM_STATUS_ESRCTYPE     8
+#define ACM_STATUS_EDESTADDR    9
+#define ACM_STATUS_EDESTTYPE    10
+
+#define ACM_FLAGS_NODELAY	(1<<30)
+
+#define ACM_MSG_HDR_LENGTH      16
+#define ACM_MAX_ADDRESS         64
+#define ACM_MSG_EP_LENGTH       72
+#define ACM_MSG_DATA_LENGTH     (ACM_MSG_EP_LENGTH * 8)
+
+struct acm_hdr {
+	uint8_t                 version;
+	uint8_t                 opcode;
+	uint8_t                 status;
+	uint8_t		        data[3];
+	uint16_t                length;
+	uint64_t                tid;
+};
+
+#define ACM_EP_INFO_NAME        0x0001
+#define ACM_EP_INFO_ADDRESS_IP  0x0002
+#define ACM_EP_INFO_ADDRESS_IP6 0x0003
+#define ACM_EP_INFO_PATH        0x0010
+
+union acm_ep_info {
+	uint8_t                 addr[ACM_MAX_ADDRESS];
+	uint8_t                 name[ACM_MAX_ADDRESS];
+	struct ibv_path_record  path;
+};
+
+#define ACM_EP_FLAG_SOURCE      (1<<0)
+#define ACM_EP_FLAG_DEST        (1<<1)
 
-#if DEFINE_ACM_MSG
-typedef struct cma_acm_msg {
+struct acm_ep_addr_data {
+	uint32_t                flags;
+	uint16_t                type;
+	uint16_t                reserved;
+	union acm_ep_info       info;
+};
+
+struct acm_resolve_msg {
+	struct acm_hdr          hdr;
+	struct acm_ep_addr_data data[0];
+};
+
+struct acm_msg {
 	struct acm_hdr                  hdr;
 	union{
 		uint8_t                 data[ACM_MSG_DATA_LENGTH];
 		struct acm_ep_addr_data resolve_data[0];
 	};
-} cma_acm_msg_t;
-#else
-typedef struct acm_msg cma_acm_msg_t;
-#endif
+};
 
 static pthread_mutex_t acm_lock = PTHREAD_MUTEX_INITIALIZER;
 static int sock = -1;
@@ -242,7 +294,7 @@ err:
 	rdma_freeaddrinfo(ib_rai);
 }
 
-static void ucma_ib_save_resp(struct rdma_addrinfo *rai, cma_acm_msg_t *msg)
+static void ucma_ib_save_resp(struct rdma_addrinfo *rai, struct acm_msg *msg)
 {
 	struct acm_ep_addr_data *ep_data;
 	struct ibv_path_data *path_data = NULL;
@@ -326,7 +378,7 @@ static int ucma_ib_addr(struct sockaddr *addr, socklen_t len)
 
 void ucma_ib_resolve(struct rdma_addrinfo **rai, struct rdma_addrinfo *hints)
 {
-	cma_acm_msg_t msg;
+	struct acm_msg msg;
 	struct acm_ep_addr_data *data;
 	int ret;
 
-- 
1.7.3

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