Code

plugin/store: Added support for "cname" plugins.
[sysdb.git] / src / core / store.c
index 04968102713822e05174e0437682a542528855e0..64e9f64064c50956b6afe56ed4dc35f5d9e5b72b 100644 (file)
@@ -27,7 +27,8 @@
 
 #include "sysdb.h"
 #include "core/store.h"
-#include "utils/error.h"
+#include "core/error.h"
+#include "core/plugin.h"
 #include "utils/llist.h"
 
 #include <assert.h>
 
 #include <pthread.h>
 
-/*
- * private data types
- */
-
-/* type used for looking up named objects */
-typedef struct {
-       sdb_object_t parent;
-       const char *obj_name;
-} sdb_store_lookup_obj_t;
-#define SDB_STORE_LOOKUP_OBJ_INIT { SDB_OBJECT_INIT, NULL }
-
 /*
  * private variables
  */
@@ -59,39 +49,13 @@ static sdb_llist_t *host_list = NULL;
 static pthread_rwlock_t host_lock = PTHREAD_RWLOCK_INITIALIZER;
 
 /*
- * private helper functions
+ * public types
  */
 
 static int
-sdb_store_obj_cmp_by_name(const sdb_object_t *a, const sdb_object_t *b)
-{
-       const sdb_store_obj_t *h1 = (const sdb_store_obj_t *)a;
-       const sdb_store_obj_t *h2 = (const sdb_store_obj_t *)b;
-
-       assert(h1 && h2);
-       return strcasecmp(h1->name, h2->name);
-} /* sdb_store_obj_cmp_by_name */
-
-static int
-sdb_cmp_store_obj_with_name(const sdb_object_t *a, const sdb_object_t *b)
+sdb_host_init(sdb_object_t *obj, va_list __attribute__((unused)) ap)
 {
-       const sdb_store_obj_t *obj = (const sdb_store_obj_t *)a;
-       const sdb_store_lookup_obj_t *lookup = (const sdb_store_lookup_obj_t *)b;
-
-       assert(obj && lookup);
-       return strcasecmp(obj->name, lookup->obj_name);
-} /* sdb_cmp_store_obj_with_name */
-
-static int
-sdb_host_init(sdb_object_t *obj, va_list ap)
-{
-       const char *name = va_arg(ap, const char *);
-
-       SDB_HOST(obj)->host_name = strdup(name);
-       if (! SDB_HOST(obj)->host_name)
-               return -1;
-
-       SDB_HOST(obj)->host_last_update = sdb_gettime();
+       SDB_HOST(obj)->_last_update = sdb_gettime();
        /* ignore errors -> last_update will be updated later */
 
        SDB_HOST(obj)->attributes = sdb_llist_create();
@@ -108,30 +72,57 @@ sdb_host_destroy(sdb_object_t *obj)
 {
        assert(obj);
 
-       if (SDB_HOST(obj)->host_name)
-               free(SDB_HOST(obj)->host_name);
-
        if (SDB_HOST(obj)->attributes)
                sdb_llist_destroy(SDB_HOST(obj)->attributes);
        if (SDB_HOST(obj)->services)
                sdb_llist_destroy(SDB_HOST(obj)->services);
 } /* sdb_host_destroy */
 
+static sdb_object_t *
+sdb_host_do_clone(const sdb_object_t *obj)
+{
+       const sdb_host_t *host = (const sdb_host_t *)obj;
+       sdb_host_t *new;
+
+       new = sdb_host_create(obj->name);
+       if (! new)
+               return NULL;
+
+       /* make sure these are initialized; else sdb_object_deref() might access
+        * arbitrary memory in case of an error */
+       new->services = new->attributes = NULL;
+
+       if (host->attributes) {
+               new->attributes = sdb_llist_clone(host->attributes);
+               if (! new->attributes) {
+                       sdb_object_deref(SDB_OBJ(new));
+                       return NULL;
+               }
+       }
+
+       new->_last_update = host->_last_update;
+       if (host->services) {
+               new->services = sdb_llist_clone(host->services);
+               if (! new->services) {
+                       sdb_object_deref(SDB_OBJ(new));
+                       return NULL;
+               }
+       }
+       return SDB_OBJ(new);
+} /* sdb_host_do_clone */
+
 static int
 sdb_attr_init(sdb_object_t *obj, va_list ap)
 {
        const char *hostname = va_arg(ap, const char *);
-       const char *name = va_arg(ap, const char *);
        const char *value = va_arg(ap, const char *);
 
        SDB_ATTR(obj)->hostname = strdup(hostname);
-       SDB_ATTR(obj)->attr_name = strdup(name);
        SDB_ATTR(obj)->attr_value = strdup(value);
-       if ((! SDB_ATTR(obj)->hostname)
-                       || (! SDB_ATTR(obj)->attr_name) || (! SDB_ATTR(obj)->attr_value))
+       if ((! SDB_ATTR(obj)->hostname) || (! SDB_ATTR(obj)->attr_value))
                return -1;
 
-       SDB_ATTR(obj)->attr_last_update = sdb_gettime();
+       SDB_ATTR(obj)->_last_update = sdb_gettime();
        return 0;
 } /* sdb_attr_init */
 
@@ -142,24 +133,35 @@ sdb_attr_destroy(sdb_object_t *obj)
 
        if (SDB_ATTR(obj)->hostname)
                free(SDB_ATTR(obj)->hostname);
-       if (SDB_ATTR(obj)->attr_name)
-               free(SDB_ATTR(obj)->attr_name);
        if (SDB_ATTR(obj)->attr_value)
                free(SDB_ATTR(obj)->attr_value);
 } /* sdb_attr_destroy */
 
+static sdb_object_t *
+sdb_attr_clone(const sdb_object_t *obj)
+{
+       const sdb_attribute_t *attr = (const sdb_attribute_t *)obj;
+       sdb_attribute_t *new;
+
+       new = sdb_attribute_create(attr->hostname,
+                       obj->name, attr->attr_value);
+       if (! new)
+               return NULL;
+
+       new->_last_update = attr->_last_update;
+       return SDB_OBJ(new);
+} /* sdb_attr_clone */
+
 static int
 sdb_svc_init(sdb_object_t *obj, va_list ap)
 {
        const char *hostname = va_arg(ap, const char *);
-       const char *name = va_arg(ap, const char *);
 
        SDB_SVC(obj)->hostname = strdup(hostname);
-       SDB_SVC(obj)->svc_name = strdup(name);
-       if ((! SDB_SVC(obj)->hostname) || (! SDB_SVC(obj)->svc_name))
+       if (! SDB_SVC(obj)->hostname)
                return -1;
 
-       SDB_SVC(obj)->svc_last_update = sdb_gettime();
+       SDB_SVC(obj)->_last_update = sdb_gettime();
        /* ignore errors -> last_update will be updated later */
        return 0;
 } /* sdb_svc_init */
@@ -171,10 +173,46 @@ sdb_svc_destroy(sdb_object_t *obj)
 
        if (SDB_SVC(obj)->hostname)
                free(SDB_SVC(obj)->hostname);
-       if (SDB_SVC(obj)->svc_name)
-               free(SDB_SVC(obj)->svc_name);
 } /* sdb_svc_destroy */
 
+static sdb_object_t *
+sdb_svc_clone(const sdb_object_t *obj)
+{
+       const sdb_service_t *svc = (const sdb_service_t *)obj;
+       sdb_service_t *new;
+
+       new = sdb_service_create(svc->hostname, obj->name);
+       if (! new)
+               return NULL;
+
+       new->_last_update = svc->_last_update;
+       return SDB_OBJ(new);
+} /* sdb_svc_clone */
+
+const sdb_type_t sdb_host_type = {
+       sizeof(sdb_host_t),
+
+       sdb_host_init,
+       sdb_host_destroy,
+       sdb_host_do_clone
+};
+
+const sdb_type_t sdb_attribute_type = {
+       sizeof(sdb_attribute_t),
+
+       sdb_attr_init,
+       sdb_attr_destroy,
+       sdb_attr_clone
+};
+
+const sdb_type_t sdb_service_type = {
+       sizeof(sdb_service_t),
+
+       sdb_svc_init,
+       sdb_svc_destroy,
+       sdb_svc_clone
+};
+
 /*
  * public API
  */
@@ -187,58 +225,32 @@ sdb_host_create(const char *name)
        if (! name)
                return NULL;
 
-       obj = sdb_object_create(sizeof(sdb_host_t), sdb_host_init,
-                       sdb_host_destroy, name);
+       obj = sdb_object_create(name, sdb_host_type);
        if (! obj)
                return NULL;
        return SDB_HOST(obj);
 } /* sdb_host_create */
 
-sdb_host_t *
-sdb_host_clone(const sdb_host_t *host)
-{
-       sdb_host_t *new;
-
-       new = sdb_host_create(host->host_name);
-       if (! new)
-               return NULL;
-
-       /* make sure these are initialized; else sdb_object_deref() might access
-        * arbitrary memory in case of an error */
-       new->services = new->attributes = NULL;
-
-       if (host->attributes) {
-               new->attributes = sdb_llist_clone(host->attributes);
-               if (! new->attributes) {
-                       sdb_object_deref(SDB_OBJ(new));
-                       return NULL;
-               }
-       }
-
-       new->host_last_update = host->host_last_update;
-       if (host->services) {
-               new->services = sdb_llist_clone(host->services);
-               if (! new->services) {
-                       sdb_object_deref(SDB_OBJ(new));
-                       return NULL;
-               }
-       }
-       return new;
-} /* sdb_host_clone */
-
 int
 sdb_store_host(const sdb_host_t *host)
 {
-       sdb_store_lookup_obj_t lookup = SDB_STORE_LOOKUP_OBJ_INIT;
-       sdb_time_t last_update;
+       char *cname;
 
+       sdb_time_t last_update;
        sdb_host_t *old;
+
        int status = 0;
 
-       if ((! host) || (! host->host_name))
+       if ((! host) || (! SDB_CONST_OBJ(host)->name))
+               return -1;
+
+       cname = sdb_plugin_cname(strdup(SDB_CONST_OBJ(host)->name));
+       if (! cname) {
+               sdb_log(SDB_LOG_ERR, "store: strdup failed");
                return -1;
+       }
 
-       last_update = host->host_last_update;
+       last_update = host->_last_update;
        if (last_update <= 0)
                last_update = sdb_gettime();
 
@@ -251,38 +263,39 @@ sdb_store_host(const sdb_host_t *host)
                }
        }
 
-       lookup.obj_name = host->host_name;
-       old = SDB_HOST(sdb_llist_search(host_list, (const sdb_object_t *)&lookup,
-                               sdb_cmp_store_obj_with_name));
+       old = SDB_HOST(sdb_llist_search_by_name(host_list, cname));
 
        if (old) {
-               if (old->host_last_update > last_update) {
+               if (old->_last_update > last_update) {
                        sdb_log(SDB_LOG_DEBUG, "store: Cannot update host '%s' - "
-                                       "value too old (%"PRIscTIME" < %"PRIscTIME")\n",
-                                       host->host_name, last_update, old->host_last_update);
+                                       "value too old (%"PRIscTIME" < %"PRIscTIME")",
+                                       cname, last_update, old->_last_update);
                        /* don't report an error; the host may be updated by multiple
                         * backends */
                        status = 1;
                }
                else {
-                       old->host_last_update = last_update;
+                       old->_last_update = last_update;
                }
        }
        else {
-               sdb_host_t *new = sdb_host_clone(host);
+               sdb_host_t *new = SDB_HOST(sdb_object_clone(SDB_CONST_OBJ(host)));
                if (! new) {
                        char errbuf[1024];
-                       sdb_log(SDB_LOG_ERR, "store: Failed to clone host object: "
-                                       "%s\n", sdb_strerror(errno, errbuf, sizeof(errbuf)));
+                       sdb_log(SDB_LOG_ERR, "store: Failed to clone host object: %s",
+                                       sdb_strerror(errno, errbuf, sizeof(errbuf)));
                        pthread_rwlock_unlock(&host_lock);
                        return -1;
                }
 
+               free(SDB_OBJ(new)->name);
+               SDB_OBJ(new)->name = cname;
+
                if (! new->attributes) {
                        if (! (new->attributes = sdb_llist_create())) {
                                char errbuf[1024];
                                sdb_log(SDB_LOG_ERR, "store: Failed to initialize "
-                                               "host object '%s': %s\n", host->host_name,
+                                               "host object '%s': %s", SDB_OBJ(new)->name,
                                                sdb_strerror(errno, errbuf, sizeof(errbuf)));
                                sdb_object_deref(SDB_OBJ(new));
                                pthread_rwlock_unlock(&host_lock);
@@ -294,7 +307,7 @@ sdb_store_host(const sdb_host_t *host)
                        if (! (new->services = sdb_llist_create())) {
                                char errbuf[1024];
                                sdb_log(SDB_LOG_ERR, "store: Failed to initialize "
-                                               "host object '%s': %s\n", host->host_name,
+                                               "host object '%s': %s", SDB_OBJ(new)->name,
                                                sdb_strerror(errno, errbuf, sizeof(errbuf)));
                                sdb_object_deref(SDB_OBJ(new));
                                pthread_rwlock_unlock(&host_lock);
@@ -303,7 +316,7 @@ sdb_store_host(const sdb_host_t *host)
                }
 
                status = sdb_llist_insert_sorted(host_list, SDB_OBJ(new),
-                               sdb_store_obj_cmp_by_name);
+                               sdb_object_cmp_by_name);
 
                /* pass control to the list or destroy in case of an error */
                sdb_object_deref(SDB_OBJ(new));
@@ -316,16 +329,12 @@ sdb_store_host(const sdb_host_t *host)
 const sdb_host_t *
 sdb_store_get_host(const char *name)
 {
-       sdb_store_lookup_obj_t lookup = SDB_STORE_LOOKUP_OBJ_INIT;
        sdb_host_t *host;
 
        if (! name)
                return NULL;
 
-       lookup.obj_name = name;
-       host = SDB_HOST(sdb_llist_search(host_list, (const sdb_object_t *)&lookup,
-                               sdb_cmp_store_obj_with_name));
-
+       host = SDB_HOST(sdb_llist_search_by_name(host_list, name));
        if (! host)
                return NULL;
        return host;
@@ -340,35 +349,17 @@ sdb_attribute_create(const char *hostname,
        if ((! hostname) || (! name) || (! value))
                return NULL;
 
-       obj = sdb_object_create(sizeof(sdb_attribute_t), sdb_attr_init,
-                       sdb_attr_destroy, hostname, name, value);
+       obj = sdb_object_create(name, sdb_attribute_type, hostname, value);
        if (! obj)
                return NULL;
        return SDB_ATTR(obj);
 } /* sdb_attribute_create */
 
-sdb_attribute_t *
-sdb_attribute_clone(const sdb_attribute_t *attr)
-{
-       sdb_attribute_t *new;
-
-       new = sdb_attribute_create(attr->hostname,
-                       attr->attr_name, attr->attr_value);
-       if (! new)
-               return NULL;
-
-       new->attr_last_update = attr->attr_last_update;
-       return new;
-} /* sdb_attribute_clone */
-
 int
 sdb_store_attribute(const sdb_attribute_t *attr)
 {
-       sdb_store_lookup_obj_t lookup = SDB_STORE_LOOKUP_OBJ_INIT;
        sdb_host_t *host;
-
        sdb_attribute_t *old;
-
        sdb_time_t last_update;
 
        int status = 0;
@@ -376,7 +367,7 @@ sdb_store_attribute(const sdb_attribute_t *attr)
        if (! attr)
                return -1;
 
-       last_update = attr->attr_last_update;
+       last_update = attr->_last_update;
        if (last_update <= 0)
                last_update = sdb_gettime();
 
@@ -385,44 +376,38 @@ sdb_store_attribute(const sdb_attribute_t *attr)
 
        pthread_rwlock_wrlock(&host_lock);
 
-       lookup.obj_name = attr->hostname;
-       host = SDB_HOST(sdb_llist_search(host_list, (const sdb_object_t *)&lookup,
-                               sdb_cmp_store_obj_with_name));
-
+       host = SDB_HOST(sdb_llist_search_by_name(host_list, attr->hostname));
        if (! host) {
                pthread_rwlock_unlock(&host_lock);
                return -1;
        }
 
-       lookup.obj_name = attr->attr_name;
-       old = SDB_ATTR(sdb_llist_search(host->attributes,
-                               (const sdb_object_t *)&lookup,
-                               sdb_cmp_store_obj_with_name));
-
+       old = SDB_ATTR(sdb_llist_search_by_name(host->attributes,
+                               SDB_CONST_OBJ(attr)->name));
        if (old) {
-               if (old->host_last_update > last_update) {
+               if (old->_last_update > last_update) {
                        sdb_log(SDB_LOG_DEBUG, "store: Cannot update attribute "
-                                       "'%s/%s' - value too old (%"PRIscTIME" < %"PRIscTIME")\n",
-                                       attr->hostname, attr->attr_name, last_update,
-                                       old->host_last_update);
+                                       "'%s/%s' - value too old (%"PRIscTIME" < %"PRIscTIME")",
+                                       attr->hostname, SDB_CONST_OBJ(attr)->name, last_update,
+                                       old->_last_update);
                        status = 1;
                }
                else {
-                       old->attr_last_update = last_update;
+                       old->_last_update = last_update;
                }
        }
        else {
-               sdb_attribute_t *new = sdb_attribute_clone(attr);
+               sdb_attribute_t *new = SDB_ATTR(sdb_object_clone(SDB_CONST_OBJ(attr)));
                if (! new) {
                        char errbuf[1024];
                        sdb_log(SDB_LOG_ERR, "store: Failed to clone attribute "
-                                       "object: %s\n", sdb_strerror(errno, errbuf, sizeof(errbuf)));
+                                       "object: %s", sdb_strerror(errno, errbuf, sizeof(errbuf)));
                        pthread_rwlock_unlock(&host_lock);
                        return -1;
                }
 
                status = sdb_llist_insert_sorted(host->attributes, SDB_OBJ(new),
-                               sdb_store_obj_cmp_by_name);
+                               sdb_object_cmp_by_name);
 
                /* pass control to the list or destroy in case of an error */
                sdb_object_deref(SDB_OBJ(new));
@@ -440,34 +425,17 @@ sdb_service_create(const char *hostname, const char *name)
        if ((! hostname) || (! name))
                return NULL;
 
-       obj = sdb_object_create(sizeof(sdb_service_t), sdb_svc_init,
-                       sdb_svc_destroy, hostname, name);
+       obj = sdb_object_create(name, sdb_service_type, hostname);
        if (! obj)
                return NULL;
        return SDB_SVC(obj);
 } /* sdb_service_create */
 
-sdb_service_t *
-sdb_service_clone(const sdb_service_t *svc)
-{
-       sdb_service_t *new;
-
-       new = sdb_service_create(svc->hostname, svc->svc_name);
-       if (! new)
-               return NULL;
-
-       new->svc_last_update = svc->svc_last_update;
-       return new;
-} /* sdb_service_clone */
-
 int
 sdb_store_service(const sdb_service_t *svc)
 {
-       sdb_store_lookup_obj_t lookup = SDB_STORE_LOOKUP_OBJ_INIT;
        sdb_host_t *host;
-
        sdb_service_t *old;
-
        sdb_time_t last_update;
 
        int status = 0;
@@ -475,7 +443,7 @@ sdb_store_service(const sdb_service_t *svc)
        if (! svc)
                return -1;
 
-       last_update = svc->svc_last_update;
+       last_update = svc->_last_update;
        if (last_update <= 0)
                last_update = sdb_gettime();
 
@@ -484,43 +452,38 @@ sdb_store_service(const sdb_service_t *svc)
 
        pthread_rwlock_wrlock(&host_lock);
 
-       lookup.obj_name = svc->hostname;
-       host = SDB_HOST(sdb_llist_search(host_list, (const sdb_object_t *)&lookup,
-                               sdb_cmp_store_obj_with_name));
-
+       host = SDB_HOST(sdb_llist_search_by_name(host_list, svc->hostname));
        if (! host) {
                pthread_rwlock_unlock(&host_lock);
                return -1;
        }
 
-       lookup.obj_name = svc->svc_name;
-       old = SDB_SVC(sdb_llist_search(host->services, (const sdb_object_t *)&lookup,
-                               sdb_cmp_store_obj_with_name));
-
+       old = SDB_SVC(sdb_llist_search_by_name(host->services,
+                               SDB_CONST_OBJ(svc)->name));
        if (old) {
-               if (old->host_last_update > last_update) {
+               if (old->_last_update > last_update) {
                        sdb_log(SDB_LOG_DEBUG, "store: Cannot update service "
-                                       "'%s/%s' - value too old (%"PRIscTIME" < %"PRIscTIME")\n",
-                                       svc->hostname, svc->svc_name, last_update,
-                                       old->host_last_update);
+                                       "'%s/%s' - value too old (%"PRIscTIME" < %"PRIscTIME")",
+                                       svc->hostname, SDB_CONST_OBJ(svc)->name, last_update,
+                                       old->_last_update);
                        status = 1;
                }
                else {
-                       old->svc_last_update = last_update;
+                       old->_last_update = last_update;
                }
        }
        else {
-               sdb_service_t *new = sdb_service_clone(svc);
+               sdb_service_t *new = SDB_SVC(sdb_object_clone(SDB_CONST_OBJ(svc)));
                if (! new) {
                        char errbuf[1024];
                        sdb_log(SDB_LOG_ERR, "store: Failed to clone service "
-                                       "object: %s\n", sdb_strerror(errno, errbuf, sizeof(errbuf)));
+                                       "object: %s", sdb_strerror(errno, errbuf, sizeof(errbuf)));
                        pthread_rwlock_unlock(&host_lock);
                        return -1;
                }
 
                status = sdb_llist_insert_sorted(host->services, SDB_OBJ(new),
-                               sdb_store_obj_cmp_by_name);
+                               sdb_object_cmp_by_name);
 
                /* pass control to the list or destroy in case of an error */
                sdb_object_deref(SDB_OBJ(new));
@@ -533,17 +496,12 @@ sdb_store_service(const sdb_service_t *svc)
 const sdb_service_t *
 sdb_store_get_service(const sdb_host_t *host, const char *name)
 {
-       sdb_store_lookup_obj_t lookup = SDB_STORE_LOOKUP_OBJ_INIT;
        sdb_service_t *svc;
 
        if ((! host) || (! name))
                return NULL;
 
-       lookup.obj_name = name;
-       svc = SDB_SVC(sdb_llist_search(host->services,
-                               (const sdb_object_t *)&lookup,
-                               sdb_cmp_store_obj_with_name));
-
+       svc = SDB_SVC(sdb_llist_search_by_name(host->services, name));
        if (! svc)
                return NULL;
        return svc;
@@ -575,12 +533,12 @@ sdb_store_dump(FILE *fh)
                assert(host);
 
                if (! sdb_strftime(time_str, sizeof(time_str),
-                                       "%F %T %z", host->host_last_update))
+                                       "%F %T %z", host->_last_update))
                        snprintf(time_str, sizeof(time_str), "<error>");
                time_str[sizeof(time_str) - 1] = '\0';
 
                fprintf(fh, "Host '%s' (last updated: %s):\n",
-                               host->host_name, time_str);
+                               SDB_OBJ(host)->name, time_str);
 
                attr_iter = sdb_llist_get_iter(host->attributes);
                if (! attr_iter) {
@@ -595,12 +553,12 @@ sdb_store_dump(FILE *fh)
                        assert(attr);
 
                        if (! sdb_strftime(time_str, sizeof(time_str),
-                                               "%F %T %z", attr->attr_last_update))
+                                               "%F %T %z", attr->_last_update))
                                snprintf(time_str, sizeof(time_str), "<error>");
                        time_str[sizeof(time_str) - 1] = '\0';
 
                        fprintf(fh, "\tAttribute '%s' -> '%s' (last updated: %s)\n",
-                                       attr->attr_name, attr->attr_value, time_str);
+                                       SDB_OBJ(attr)->name, attr->attr_value, time_str);
                }
 
                sdb_llist_iter_destroy(attr_iter);
@@ -618,12 +576,12 @@ sdb_store_dump(FILE *fh)
                        assert(svc);
 
                        if (! sdb_strftime(time_str, sizeof(time_str),
-                                               "%F %T %z", svc->svc_last_update))
+                                               "%F %T %z", svc->_last_update))
                                snprintf(time_str, sizeof(time_str), "<error>");
                        time_str[sizeof(time_str) - 1] = '\0';
 
                        fprintf(fh, "\tService '%s' (last updated: %s)\n",
-                                       svc->svc_name, time_str);
+                                       SDB_OBJ(svc)->name, time_str);
                }
 
                sdb_llist_iter_destroy(svc_iter);