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-rw-r--r--src/irmd/registry.c593
1 files changed, 593 insertions, 0 deletions
diff --git a/src/irmd/registry.c b/src/irmd/registry.c
new file mode 100644
index 00000000..063309a4
--- /dev/null
+++ b/src/irmd/registry.c
@@ -0,0 +1,593 @@
+/*
+ * Ouroboros - Copyright (C) 2016
+ *
+ * The IPC Resource Manager - Registry
+ *
+ * Dimitri Staessens <[email protected]>
+ *
+ * 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 "registry.h"
+
+#include <ouroboros/config.h>
+
+#define OUROBOROS_PREFIX "registry"
+
+#include <ouroboros/logs.h>
+#include <ouroboros/irm_config.h>
+
+#include <stdlib.h>
+#include <stdbool.h>
+#include <string.h>
+#include <errno.h>
+
+struct reg_instance * reg_instance_create(pid_t api)
+{
+ struct reg_instance * i;
+ i = malloc(sizeof(*i));
+ if (i == NULL)
+ return NULL;
+
+ i->api = api;
+ i->state = REG_I_WAKE;
+
+ pthread_mutex_init(&i->mutex, NULL);
+ pthread_cond_init(&i->wakeup, NULL);
+
+ INIT_LIST_HEAD(&i->next);
+
+ return i;
+}
+
+void reg_instance_destroy(struct reg_instance * i)
+{
+ bool wait = true;
+ pthread_mutex_lock(&i->mutex);
+ i->state = REG_I_NULL;
+
+ pthread_cond_broadcast(&i->wakeup);
+ pthread_mutex_unlock(&i->mutex);
+
+ while (wait) {
+ pthread_mutex_lock(&i->mutex);
+ if (pthread_cond_destroy(&i->wakeup))
+ pthread_cond_broadcast(&i->wakeup);
+ else
+ wait = false;
+ pthread_mutex_unlock(&i->mutex);
+ }
+
+ pthread_mutex_destroy(&i->mutex);
+
+ free(i);
+}
+
+void reg_instance_sleep(struct reg_instance * i)
+{
+ pthread_mutex_lock(&i->mutex);
+ if (i->state != REG_I_WAKE) {
+ pthread_mutex_unlock(&i->mutex);
+ return;
+ }
+
+ i->state = REG_I_SLEEP;
+
+ pthread_cleanup_push((void(*)(void *)) pthread_mutex_unlock,
+ (void *) &i->mutex);
+
+ while (i->state == REG_I_SLEEP)
+ pthread_cond_wait(&i->wakeup, &i->mutex);
+
+ pthread_cleanup_pop(true);
+}
+
+void reg_instance_wake(struct reg_instance * i)
+{
+ pthread_mutex_lock(&i->mutex);
+
+ if (i->state == REG_I_NULL) {
+ pthread_mutex_unlock(&i->mutex);
+ return;
+ }
+
+ i->state = REG_I_WAKE;
+
+ pthread_cond_signal(&i->wakeup);
+ pthread_mutex_unlock(&i->mutex);
+}
+
+struct reg_entry * reg_entry_create()
+{
+ struct reg_entry * e = malloc(sizeof(*e));
+ if (e == NULL)
+ return NULL;
+
+ e->name = NULL;
+ e->state = REG_NAME_NULL;
+ e->flags = 0;
+
+ e->req_ae_name = NULL;
+ e->response = -1;
+
+ return e;
+}
+
+struct reg_entry * reg_entry_init(struct reg_entry * e,
+ char * name,
+ char * ap_name,
+ uint32_t flags)
+{
+ struct reg_ap_name * n = NULL;
+
+ if (e == NULL || name == NULL || ap_name == NULL)
+ return NULL;
+
+ n = malloc(sizeof(*n));
+ if (n == NULL)
+ return NULL;
+
+ INIT_LIST_HEAD(&e->next);
+ INIT_LIST_HEAD(&e->ap_names);
+ INIT_LIST_HEAD(&e->auto_ap_info);
+ INIT_LIST_HEAD(&e->ap_instances);
+
+ e->name = name;
+ e->flags = flags;
+ n->ap_name = ap_name;
+
+ list_add(&n->next, &e->ap_names);
+
+ if (pthread_cond_init(&e->acc_signal, NULL)) {
+ free(e);
+ return NULL;
+ }
+
+ if (pthread_mutex_init(&e->state_lock, NULL)) {
+ free(e);
+ return NULL;
+ }
+
+ e->state = REG_NAME_IDLE;
+
+ return e;
+}
+
+void reg_entry_destroy(struct reg_entry * e)
+{
+ struct list_head * pos = NULL;
+ struct list_head * n = NULL;
+
+ bool wait = true;
+
+ if (e == NULL)
+ return;
+
+ pthread_mutex_lock(&e->state_lock);
+
+ e->state = REG_NAME_NULL;
+
+ pthread_cond_broadcast(&e->acc_signal);
+ pthread_mutex_unlock(&e->state_lock);
+
+ while (wait) {
+ pthread_mutex_lock(&e->state_lock);
+ if (pthread_cond_destroy(&e->acc_signal))
+ pthread_cond_broadcast(&e->acc_signal);
+ else
+ wait = false;
+ pthread_mutex_unlock(&e->state_lock);
+ }
+
+ pthread_mutex_destroy(&e->state_lock);
+
+ if (e->name != NULL)
+ free(e->name);
+
+ if (e->req_ae_name != NULL)
+ free(e->req_ae_name);
+
+ list_for_each_safe(pos, n, &e->ap_instances) {
+ struct reg_instance * i =
+ list_entry(pos, struct reg_instance, next);
+ reg_instance_destroy(i);
+ }
+
+ list_for_each_safe(pos, n, &e->auto_ap_info) {
+ struct reg_auto * a =
+ list_entry(pos, struct reg_auto, next);
+
+ if (a->argv != NULL) {
+ char ** t = a->argv;
+ while (*a->argv != NULL)
+ free(*(a->argv++));
+ free(t);
+ }
+
+ free(a->ap_name);
+ free(a);
+ }
+
+ list_for_each_safe(pos, n, &e->ap_names) {
+ struct reg_ap_name * n =
+ list_entry(pos, struct reg_ap_name, next);
+
+ free(n->ap_name);
+ free(n);
+ }
+
+ free(e);
+}
+
+struct reg_ap_name * reg_entry_get_ap_name(struct reg_entry * e,
+ char * ap_name)
+{
+ struct list_head * pos = NULL;
+
+ list_for_each(pos, &e->ap_names) {
+ struct reg_ap_name * n =
+ list_entry(pos, struct reg_ap_name, next);
+
+ if (strcmp(ap_name, n->ap_name) == 0)
+ return n;
+ }
+
+ return NULL;
+}
+
+struct reg_instance * reg_entry_get_reg_instance(struct reg_entry * e,
+ pid_t api)
+{
+ struct list_head * pos = NULL;
+
+ list_for_each(pos, &e->ap_instances) {
+ struct reg_instance * r =
+ list_entry(pos, struct reg_instance, next);
+
+ if (r->api == api)
+ return r;
+ }
+
+ return NULL;
+}
+
+struct reg_auto * reg_entry_get_reg_auto(struct reg_entry * e,
+ char * ap_name)
+{
+ struct list_head * pos = NULL;
+
+ list_for_each(pos, &e->auto_ap_info) {
+ struct reg_auto * a =
+ list_entry(pos, struct reg_auto, next);
+
+ if (strcmp(ap_name, a->ap_name) == 0)
+ return a;
+ }
+
+ return NULL;
+}
+
+pid_t reg_entry_resolve_api(struct reg_entry * e)
+{
+ struct list_head * pos = NULL;
+
+ /* FIXME: now just returns the first accepting instance */
+ list_for_each(pos, &e->ap_instances) {
+ struct reg_instance * r =
+ list_entry(pos, struct reg_instance, next);
+ return r->api;
+ }
+
+ return 0;
+}
+
+char ** reg_entry_resolve_auto(struct reg_entry * e)
+{
+ struct list_head * pos = NULL;
+
+ /* FIXME: now just returns the first accepting instance */
+ list_for_each(pos, &e->auto_ap_info) {
+ struct reg_auto * r =
+ list_entry(pos, struct reg_auto, next);
+ return r->argv;
+ }
+
+ return NULL;
+}
+
+struct reg_entry * registry_get_entry_by_name(struct list_head * registry,
+ char * name)
+{
+ struct list_head * pos = NULL;
+
+ list_for_each(pos, registry) {
+ struct reg_entry * e =
+ list_entry(pos, struct reg_entry, next);
+
+ if (strcmp(name, e->name) == 0)
+ return e;
+ }
+
+ return NULL;
+}
+
+struct reg_entry * registry_get_entry_by_ap_name(struct list_head * registry,
+ char * ap_name)
+{
+ struct list_head * pos = NULL;
+
+ list_for_each(pos, registry) {
+ struct list_head * p = NULL;
+ struct reg_entry * e =
+ list_entry(pos, struct reg_entry, next);
+
+ list_for_each(p, &e->ap_names) {
+ struct reg_ap_name * n =
+ list_entry(p, struct reg_ap_name, next);
+
+ if (strcmp(n->ap_name, ap_name) == 0)
+ return e;
+ }
+ }
+
+ return NULL;
+}
+
+struct reg_entry * registry_get_entry_by_ap_id(struct list_head * registry,
+ pid_t api)
+{
+ struct list_head * pos = NULL;
+
+ list_for_each(pos, registry) {
+ struct list_head * p = NULL;
+ struct reg_entry * e =
+ list_entry(pos, struct reg_entry, next);
+
+ list_for_each(p, &e->ap_instances) {
+ struct reg_instance * r =
+ list_entry(p, struct reg_instance, next);
+
+ if (r->api == api)
+ return e;
+ }
+ }
+
+ return NULL;
+}
+
+int registry_add_entry(struct list_head * registry,
+ char * name,
+ char * ap_name,
+ uint16_t flags)
+{
+ struct reg_entry * e = NULL;
+
+ if (name == NULL || ap_name == NULL)
+ return -EINVAL;
+
+ e = registry_get_entry_by_name(registry, name);
+ if (e != NULL) {
+ LOG_DBG("Name %s already registered.", name);
+ return -1;
+ }
+
+ e = reg_entry_create();
+ if (e == NULL) {
+ LOG_DBG("Could not create registry entry.");
+ return -1;
+ }
+
+ e = reg_entry_init(e, name, ap_name, flags);
+ if (e == NULL) {
+ LOG_DBG("Could not initialize registry entry.");
+ reg_entry_destroy(e);
+ return -1;
+ }
+
+ list_add(&e->next, registry);
+
+ return 0;
+}
+
+int registry_add_ap_auto(struct list_head * registry,
+ char * name,
+ char * ap_name,
+ char ** argv)
+{
+ struct reg_entry * e;
+ struct reg_auto * a;
+
+ if (name == NULL || ap_name == NULL)
+ return -EINVAL;
+
+ e = registry_get_entry_by_name(registry, name);
+ if (e == NULL) {
+ LOG_DBG("Name %s not found in registry.", name);
+ return -1;
+ }
+
+ if (!(e->flags & BIND_AP_AUTO)) {
+ LOG_DBG("%s does not allow auto-instantiation.", name);
+ return -1;
+ }
+
+ if (!reg_entry_has_ap_name(e, ap_name)) {
+ LOG_DBG("AP name %s not associated with %s.", ap_name, name);
+ return -1;
+ }
+
+ if (e->state == REG_NAME_NULL) {
+ LOG_DBG("Tried to add instantiation info in NULL state.");
+ return -1;
+ }
+
+ a = reg_entry_get_reg_auto(e, ap_name);
+ if (a != NULL) {
+ LOG_DBG("Updating auto-instantiation info for %s.", ap_name);
+ list_del(&a->next);
+ free(a->ap_name);
+ if (a->argv != NULL) {
+ while (*a->argv != NULL)
+ free(*a->argv++);
+ }
+ } else {
+ a = malloc(sizeof(*a));
+ if (a == NULL)
+ return -1;
+ }
+
+ a->ap_name = ap_name;
+ a->argv = argv;
+
+ if (e->state == REG_NAME_IDLE)
+ e->state = REG_NAME_AUTO_ACCEPT;
+
+ list_add(&a->next, &e->auto_ap_info);
+
+ return 0;
+}
+
+
+int registry_remove_ap_auto(struct list_head * registry,
+ char * name,
+ char * ap_name)
+{
+ struct reg_entry * e;
+ struct reg_auto * a;
+
+ if (name == NULL || ap_name == NULL)
+ return -EINVAL;
+
+ e = registry_get_entry_by_name(registry, name);
+ if (e == NULL) {
+ LOG_DBG("Name %s not found in registry.", name);
+ return -1;
+ }
+
+ a = reg_entry_get_reg_auto(e, ap_name);
+ if (a == NULL) {
+ LOG_DBG("Auto-instantiation info for %s not found.", ap_name);
+ return -1;
+ }
+
+ list_del(&a->next);
+
+ if (e->state == REG_NAME_AUTO_ACCEPT && list_empty(&e->auto_ap_info))
+ e->state = REG_NAME_IDLE;
+
+ return 0;
+}
+
+
+struct reg_instance * registry_add_ap_instance(struct list_head * registry,
+ char * name,
+ pid_t api)
+{
+ struct reg_entry * e = NULL;
+ struct reg_instance * i = NULL;
+
+ if (name == NULL || api == 0)
+ return NULL;
+
+ e = registry_get_entry_by_name(registry, name);
+ if (e == NULL) {
+ LOG_DBG("Name %s not found in registry.", name);
+ return NULL;
+ }
+
+ if (api == 0) {
+ LOG_DBG("Invalid api.");
+ return NULL;
+ }
+
+ if (reg_entry_has_api(e, api)) {
+ LOG_DBG("Instance already registered with this name.");
+ return NULL;
+ }
+
+ if (e->state == REG_NAME_NULL) {
+ LOG_DBG("Tried to add instance in NULL state.");
+ return NULL;
+ }
+
+ i = reg_instance_create(api);
+ if (i == NULL) {
+ LOG_DBG("Failed to create reg_instance");
+ return NULL;
+ }
+
+ if (e->state == REG_NAME_IDLE || e->state == REG_NAME_AUTO_ACCEPT
+ || e->state == REG_NAME_AUTO_EXEC) {
+ e->state = REG_NAME_FLOW_ACCEPT;
+ pthread_cond_signal(&e->acc_signal);
+ }
+
+ list_add(&i->next, &e->ap_instances);
+
+ return i;
+}
+
+int registry_remove_ap_instance(struct list_head * registry,
+ char * name,
+ pid_t api)
+{
+ struct reg_entry * e = NULL;
+ struct reg_instance * i = NULL;
+
+ if (name == NULL || api == 0)
+ return -1;
+
+ e = registry_get_entry_by_name(registry, name);
+ if (e == NULL) {
+ LOG_DBG("Name %s is not registered.", name);
+ return -1;
+ }
+
+ i = reg_entry_get_reg_instance(e, api);
+ if (i == NULL) {
+ LOG_DBG("Instance %d is not accepting flows for %s.",
+ api, name);
+ return -1;
+ }
+
+ list_del(&i->next);
+
+ reg_instance_destroy(i);
+
+ if (list_empty(&e->ap_instances)) {
+ if ((e->flags & BIND_AP_AUTO) &&
+ !list_empty(&e->auto_ap_info))
+ e->state = REG_NAME_AUTO_ACCEPT;
+ else
+ e->state = REG_NAME_IDLE;
+ } else {
+ e->state = REG_NAME_FLOW_ACCEPT;
+ }
+
+ return 0;
+}
+
+void registry_del_name(struct list_head * registry,
+ char * name)
+{
+ struct reg_entry * e = registry_get_entry_by_name(registry, name);
+ if (e == NULL)
+ return;
+
+ list_del(&e->next);
+ reg_entry_destroy(e);
+
+ return;
+}
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