lib, irmd: Bind AP instances to AP_subsets

This call will allow grouping AP instances of a certain AP together
which are configured identically. Adds the bind operation to dev and
updates the applications to make use of this call. Flow_alloc is now
only called with the pid and doesn't send the apn anymore.

4 files changed, 233 insertions, 4 deletions

diff --git a/src/irmd/CMakeLists.txt b/src/irmd/CMakeLists.txt
index 89fbae08..ca068703 100644
--- a/src/irmd/CMakeLists.txt
+++ b/src/irmd/CMakeLists.txt
@@ -6,6 +6,7 @@ include_directories(${CMAKE_BINARY_DIR}/include)
 
 set(SOURCE_FILES
         # Add source files here
+        api_table.c
         irm_flow.c
         main.c
         reg_api.c
diff --git a/src/irmd/api_table.c b/src/irmd/api_table.c
new file mode 100644
index 00000000..b62b2b55
--- /dev/null
+++ b/src/irmd/api_table.c
@@ -0,0 +1,115 @@
+/*
+ * Ouroboros - Copyright (C) 2016
+ *
+ * The IPC Resource Manager - Application Instance Table
+ *
+ *    Dimitri Staessens <dimitri.staessens@intec.ugent.be>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <ouroboros/config.h>
+#include <ouroboros/list.h>
+#include <ouroboros/errno.h>
+
+#include "api_table.h"
+
+#include <stdlib.h>
+
+struct api_entry * api_entry_create(pid_t api,
+                                    char * apn,
+                                    char * ap_subset)
+{
+        struct api_entry * e = malloc(sizeof(*e));
+        if (e == NULL)
+                return NULL;
+
+        INIT_LIST_HEAD(&e->next);
+
+        e->api = api;
+        e->apn = apn;
+        e->ap_subset = ap_subset;
+
+        return e;
+}
+
+void api_entry_destroy(struct api_entry * e)
+{
+        if (e->apn != NULL)
+                free(e->apn);
+        if (e->ap_subset != NULL)
+                free(e->ap_subset);
+        free(e);
+}
+
+int api_table_add_api(struct list_head * api_table,
+                      pid_t api, char * apn, char * ap_subset)
+{
+        if (apn == NULL)
+                return -EINVAL;
+
+        struct api_entry * e = api_entry_create(api, apn, ap_subset);
+        if (e == NULL)
+                return -ENOMEM;
+
+        list_add(&e->next, api_table);
+
+        return 0;
+}
+
+void api_table_del_api(struct list_head * api_table, pid_t api)
+{
+        struct list_head * p;
+        struct list_head * h;
+
+        list_for_each_safe(p, h, api_table) {
+                struct api_entry * e =
+                        list_entry(p, struct api_entry, next);
+
+                if (api == e->api) {
+                        list_del(&e->next);
+                        api_entry_destroy(e);
+                }
+        }
+}
+
+char * api_table_get_apn(struct list_head * api_table, pid_t api)
+{
+        struct list_head * h;
+
+        list_for_each(h, api_table) {
+                struct api_entry * e =
+                        list_entry(h, struct api_entry, next);
+
+                if (api == e->api)
+                        return e->apn;
+        }
+
+        return NULL;
+}
+char * api_table_get_ap_subset(struct list_head * api_table, pid_t api)
+{
+        struct list_head * h;
+
+        list_for_each(h, api_table) {
+                struct api_entry * e =
+                        list_entry(h, struct api_entry, next);
+
+                if (api == e->api)
+                        return e->ap_subset;
+        }
+
+        return NULL;
+}
diff --git a/src/irmd/api_table.h b/src/irmd/api_table.h
new file mode 100644
index 00000000..694de6da
--- /dev/null
+++ b/src/irmd/api_table.h
@@ -0,0 +1,46 @@
+/*
+ * Ouroboros - Copyright (C) 2016
+ *
+ * The IPC Resource Manager - Application Instance Table
+ *
+ *    Dimitri Staessens <dimitri.staessens@intec.ugent.be>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#ifndef OUROBOROS_IRMD_API_TABLE_H
+#define OUROBOROS_IRMD_API_TABLE_H
+
+#include <unistd.h>
+
+struct api_entry {
+        struct list_head next;
+        pid_t  api;
+        char * apn;
+        char * ap_subset; /* unique instance identifier */
+};
+
+struct api_entry * api_entry_create(pid_t api, char * apn, char * ap_subset);
+void               api_entry_destroy(struct api_entry * e);
+
+int    api_table_add_api(struct list_head * api_table,
+                         pid_t api,
+                         char * apn,
+                         char * ap_subset);
+void   api_table_del_api(struct list_head * api_table, pid_t api);
+char * api_table_get_apn(struct list_head * api_table, pid_t api);
+char * api_table_get_ap_subset(struct list_head * api_table, pid_t api);
+
+#endif /* OUROBOROS_IRMD_API_TABLE_H */
diff --git a/src/irmd/main.c b/src/irmd/main.c
index e36fb98e..55764941 100644
--- a/src/irmd/main.c
+++ b/src/irmd/main.c
@@ -43,6 +43,7 @@
 #include "utils.h"
 #include "registry.h"
 #include "irm_flow.h"
+#include "api_table.h"
 
 #include <sys/socket.h>
 #include <sys/un.h>
@@ -78,8 +79,6 @@ struct spawned_api {
         pid_t            api;
 };
 
-/* keeps track of port_id's between N and N - 1 */
-
 struct irm {
         /* FIXME: list of ipcps could be merged into the registry */
         struct list_head    ipcps;
@@ -87,6 +86,7 @@ struct irm {
         struct list_head    registry;
         pthread_rwlock_t    reg_lock;
 
+        struct list_head    api_table;
         struct list_head    spawned_apis;
 
         /* keep track of all flows in this processing system */
@@ -717,14 +717,59 @@ static int ap_unreg(char *  name,
         return ret;
 }
 
+static int api_bind(pid_t api, char * apn, char * ap_subset)
+{
+        int ret = 0;
+        char * apn_dup;
+        char * ap_s_dup = ap_subset;
+        if (apn == NULL)
+                return -EINVAL;
+
+        pthread_rwlock_rdlock(&irmd->state_lock);
+
+        if (irmd->state != IRMD_RUNNING) {
+                pthread_rwlock_unlock(&irmd->state_lock);
+                return -EPERM;
+        }
+
+        pthread_rwlock_wrlock(&irmd->reg_lock);
+
+        apn_dup = strdup(apn);
+        if (apn_dup == NULL) {
+                pthread_rwlock_unlock(&irmd->reg_lock);
+                pthread_rwlock_unlock(&irmd->state_lock);
+                return -ENOMEM;
+        }
+
+        if (ap_subset != NULL) {
+                ap_s_dup = strdup(ap_subset);
+                if (ap_s_dup == NULL) {
+                        pthread_rwlock_unlock(&irmd->reg_lock);
+                        pthread_rwlock_unlock(&irmd->state_lock);
+                        return -ENOMEM;
+                }
+        }
+
+        ret = api_table_add_api(&irmd->api_table,
+                                api,
+                                apn_dup,
+                                ap_s_dup);
+
+        pthread_rwlock_unlock(&irmd->reg_lock);
+        pthread_rwlock_unlock(&irmd->state_lock);
+
+        return ret;
+}
+
 static struct irm_flow * flow_accept(pid_t   api,
-                                     char *  srv_ap_name,
                                      char ** dst_ae_name)
 {
         struct irm_flow *  f   = NULL;
         struct reg_entry * rne = NULL;
         struct reg_api *   rgi = NULL;
 
+        char * srv_ap_name;
+
         pthread_rwlock_rdlock(&irmd->state_lock);
 
         if (irmd->state != IRMD_RUNNING) {
@@ -734,6 +779,10 @@ static struct irm_flow * flow_accept(pid_t   api,
 
         pthread_rwlock_wrlock(&irmd->reg_lock);
 
+        srv_ap_name = api_table_get_apn(&irmd->api_table, api);
+        if (srv_ap_name == NULL)
+                return NULL;
+
         rne = registry_get_entry_by_apn(&irmd->registry, srv_ap_name);
         if (rne == NULL) {
                 pthread_rwlock_unlock(&irmd->reg_lock);
@@ -1458,6 +1507,18 @@ void * irm_flow_cleaner()
                         }
                 }
 
+                list_for_each_safe(pos, n, &irmd->api_table) {
+                        struct api_entry * e =
+                                list_entry(pos, struct api_entry, next);
+
+                        if (kill(e->api, 0) < 0) {
+                                LOG_INFO("Instance %d removed from api table.",
+                                         e->api);
+                                list_del(&e->next);
+                                api_entry_destroy(e);
+                        }
+                }
+
                 pthread_rwlock_unlock(&irmd->reg_lock);
                 pthread_rwlock_unlock(&irmd->state_lock);
 
@@ -1542,6 +1603,12 @@ void * mainloop()
                                                      msg->ap_name,
                                                      msg->opts);
                         break;
+                case IRM_MSG_CODE__IRM_API_BIND:
+                        ret_msg.has_result = true;
+                        ret_msg.result = api_bind(msg->api,
+                                                  msg->ap_name,
+                                                  msg->ap_subset);
+                        break;
                 case IRM_MSG_CODE__IRM_LIST_IPCPS:
                         ret_msg.n_apis = list_ipcps(msg->dst_name,
                                                     &apis);
@@ -1562,7 +1629,6 @@ void * mainloop()
                         break;
                 case IRM_MSG_CODE__IRM_FLOW_ACCEPT:
                         e = flow_accept(msg->api,
-                                        msg->ap_name,
                                         &ret_msg.ae_name);
 
                         if (e == NULL) {
@@ -1700,6 +1766,7 @@ static struct irm * irm_create()
         }
 
         INIT_LIST_HEAD(&irmd->ipcps);
+        INIT_LIST_HEAD(&irmd->api_table);
         INIT_LIST_HEAD(&irmd->spawned_apis);
         INIT_LIST_HEAD(&irmd->registry);
         INIT_LIST_HEAD(&irmd->irm_flows);