lib: Pass qosspec at flow allocation

The flow allocator now passes the full qos specification to the
endpoint, instead of just a cube. This is a more flexible
architecture, as it makes QoS cubes internal to the layers.

Adds endianness transforms for the flow allocator protocol in the
normal IPCP.

Signed-off-by: Dimitri Staessens <dimitri.staessens@ugent.be>
Signed-off-by: Sander Vrijders <sander.vrijders@ugent.be>

1 files changed, 37 insertions, 14 deletions

diff --git a/src/ipcpd/eth/eth.c b/src/ipcpd/eth/eth.c
index 44ef3756..6fd7b805 100644
--- a/src/ipcpd/eth/eth.c
+++ b/src/ipcpd/eth/eth.c
@@ -146,15 +146,27 @@
 #define NAME_QUERY_REPLY     3
 
 struct mgmt_msg {
-        uint8_t  code;
 #if defined(BUILD_ETH_DIX)
         uint16_t seid;
         uint16_t deid;
 #elif defined(BUILD_ETH_LLC)
         uint8_t  ssap;
         uint8_t  dsap;
+        /* QoS here for alignment */
+        uint8_t  code;
+        uint8_t  availability;
+#endif
+        /* QoS parameters from spec, aligned */
+        uint32_t loss;
+        uint64_t bandwidth;
+        uint32_t ber;
+        uint32_t max_gap;
+        uint32_t delay;
+        uint8_t  in_order;
+#if defined (BUILD_ETH_DIX)
+        uint8_t  code;
+        uint8_t  availability;
 #endif
-        uint8_t  qoscube;
         int8_t   response;
 } __attribute__((packed));
 
@@ -433,7 +445,7 @@ static int eth_ipcp_alloc(const uint8_t * dst_addr,
                           uint8_t         ssap,
 #endif
                           const uint8_t * hash,
-                          qoscube_t       cube)
+                          qosspec_t       qs)
 {
         uint8_t *         buf;
         struct mgmt_msg * msg;
@@ -453,7 +465,14 @@ static int eth_ipcp_alloc(const uint8_t * dst_addr,
 #elif defined(BUILD_ETH_LLC)
         msg->ssap    = ssap;
 #endif
-        msg->qoscube = cube;
+
+        msg->delay        = hton32(qs.delay);
+        msg->bandwidth    = hton64(qs.bandwidth);
+        msg->availability = qs.availability;
+        msg->loss         = hton32(qs.loss);
+        msg->ber          = hton32(qs.ber);
+        msg->in_order     = qs.in_order;
+        msg->max_gap      = hton32(qs.max_gap);
 
         memcpy(msg + 1, hash, ipcp_dir_hash_len());
 
@@ -523,7 +542,7 @@ static int eth_ipcp_req(uint8_t *       r_addr,
                         uint8_t         r_sap,
 #endif
                         const uint8_t * dst,
-                        qoscube_t       cube)
+                        qosspec_t       qs)
 {
         struct timespec ts = {0, ALLOC_TIMEO * MILLION};
         struct timespec abstime;
@@ -547,7 +566,7 @@ static int eth_ipcp_req(uint8_t *       r_addr,
         }
 
         /* reply to IRM, called under lock to prevent race */
-        fd = ipcp_flow_req_arr(getpid(), dst, ipcp_dir_hash_len(), cube);
+        fd = ipcp_flow_req_arr(getpid(), dst, ipcp_dir_hash_len(), qs);
         if (fd < 0) {
                 pthread_mutex_unlock(&ipcpi.alloc_lock);
                 log_err("Could not get new flow from IRMd.");
@@ -687,11 +706,20 @@ static int eth_ipcp_mgmt_frame(const uint8_t * buf,
                                uint8_t *       r_addr)
 {
         struct mgmt_msg * msg;
+        qosspec_t         qs;
 
         msg = (struct mgmt_msg *) buf;
 
         switch (msg->code) {
         case FLOW_REQ:
+                qs.delay = ntoh32(msg->delay);
+                qs.bandwidth = ntoh64(msg->bandwidth);
+                qs.availability = msg->availability;
+                qs.loss = ntoh32(msg->loss);
+                qs.ber = ntoh32(msg->ber);
+                qs.in_order = msg->in_order;
+                qs.max_gap = ntoh32(msg->max_gap);
+
                 if (shim_data_reg_has(eth_data.shim_data,
                                       buf + sizeof(*msg))) {
                         eth_ipcp_req(r_addr,
@@ -701,7 +729,7 @@ static int eth_ipcp_mgmt_frame(const uint8_t * buf,
                                      msg->ssap,
 #endif
                                      buf + sizeof(*msg),
-                                     msg->qoscube);
+                                     qs);
                 }
                 break;
         case FLOW_REPLY:
@@ -1553,7 +1581,7 @@ static int eth_ipcp_query(const uint8_t * hash)
 
 static int eth_ipcp_flow_alloc(int             fd,
                                const uint8_t * hash,
-                               qoscube_t       cube)
+                               qosspec_t       qs)
 {
 #ifdef BUILD_ETH_LLC
         uint8_t  ssap = 0;
@@ -1565,11 +1593,6 @@ static int eth_ipcp_flow_alloc(int             fd,
 
         assert(hash);
 
-        if (cube > QOS_CUBE_DATA) {
-                log_dbg("Unsupported QoS requested.");
-                return -1;
-        }
-
         if (!shim_data_dir_has(eth_data.shim_data, hash)) {
                 log_err("Destination unreachable.");
                 return -1;
@@ -1597,7 +1620,7 @@ static int eth_ipcp_flow_alloc(int             fd,
 #elif defined(BUILD_ETH_LLC)
                            ssap,
 #endif
-                           hash, cube) < 0) {
+                           hash, qs) < 0) {
 #ifdef BUILD_ETH_LLC
                 pthread_rwlock_wrlock(&eth_data.flows_lock);
                 bmp_release(eth_data.saps, eth_data.fd_to_ef[fd].sap);