diff --git a/tools/attrd.c b/tools/attrd.c index c59f6c9c50..8d58e706e4 100644 --- a/tools/attrd.c +++ b/tools/attrd.c @@ -1,855 +1,856 @@ /* * Copyright (C) 2004 Andrew Beekhof * * 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 2.1 of the License, or (at your option) any later version. * * This software 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 library; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define OPTARGS "hV" #if SUPPORT_HEARTBEAT ll_cluster_t *attrd_cluster_conn; #endif GMainLoop* mainloop = NULL; char *attrd_uname = NULL; char *attrd_uuid = NULL; gboolean need_shutdown = FALSE; GHashTable *attr_hash = NULL; cib_t *cib_conn = NULL; typedef struct attr_hash_entry_s { char *uuid; char *id; char *set; char *section; char *value; char *stored_value; int timeout; char *dampen; guint timer_id; } attr_hash_entry_t; static void free_hash_entry(gpointer data) { attr_hash_entry_t *entry = data; if (entry == NULL) { return; } crm_free(entry->id); crm_free(entry->set); crm_free(entry->dampen); crm_free(entry->section); crm_free(entry->uuid); crm_free(entry->value); crm_free(entry->stored_value); crm_free(entry); } void attrd_local_callback(xmlNode * msg); gboolean attrd_timer_callback(void *user_data); gboolean attrd_trigger_update(attr_hash_entry_t *hash_entry); void attrd_perform_update(attr_hash_entry_t *hash_entry); static void attrd_shutdown(int nsig) { need_shutdown = TRUE; crm_info("Exiting"); if (mainloop != NULL && g_main_is_running(mainloop)) { g_main_quit(mainloop); } else { exit(0); } } static void usage(const char* cmd, int exit_status) { FILE* stream; stream = exit_status ? stderr : stdout; fprintf(stream, "usage: %s [-srkh] [-c configure file]\n", cmd); /* fprintf(stream, "\t-d\tsets debug level\n"); */ /* fprintf(stream, "\t-s\tgets daemon status\n"); */ /* fprintf(stream, "\t-r\trestarts daemon\n"); */ /* fprintf(stream, "\t-k\tstops daemon\n"); */ /* fprintf(stream, "\t-h\thelp message\n"); */ fflush(stream); exit(exit_status); } typedef struct attrd_client_s { char *id; char *name; IPC_Channel *channel; GCHSource *source; } attrd_client_t; static void stop_attrd_timer(attr_hash_entry_t *hash_entry) { if(hash_entry != NULL && hash_entry->timer_id != 0) { crm_debug_2("Stopping %s timer", hash_entry->id); g_source_remove(hash_entry->timer_id); hash_entry->timer_id = 0; } } static gboolean attrd_ipc_callback(IPC_Channel *client, gpointer user_data) { int lpc = 0; xmlNode *msg = NULL; attrd_client_t *curr_client = (attrd_client_t*)user_data; gboolean stay_connected = TRUE; crm_debug_2("Invoked: %s", curr_client->id); while(IPC_ISRCONN(client)) { if(client->ops->is_message_pending(client) == 0) { break; } msg = xmlfromIPC(client, MAX_IPC_DELAY); if (msg == NULL) { break; } lpc++; crm_debug_2("Processing msg from %s", curr_client->id); crm_log_xml(LOG_DEBUG_3, __PRETTY_FUNCTION__, msg); attrd_local_callback(msg); free_xml(msg); msg = NULL; if(client->ch_status != IPC_CONNECT) { break; } } crm_debug_2("Processed %d messages", lpc); if (client->ch_status != IPC_CONNECT) { stay_connected = FALSE; } return stay_connected; } static void attrd_connection_destroy(gpointer user_data) { attrd_client_t *client = user_data; /* cib_process_disconnect */ if(client == NULL) { return; } if(client->source != NULL) { crm_debug_4("Deleting %s (%p) from mainloop", client->name, client->source); G_main_del_IPC_Channel(client->source); client->source = NULL; } crm_debug_3("Destroying %s (%p)", client->name, client); crm_free(client->name); crm_free(client->id); crm_free(client); crm_debug_4("Freed the cib client"); return; } static gboolean attrd_connect(IPC_Channel *channel, gpointer user_data) { attrd_client_t *new_client = NULL; crm_debug_3("Connecting channel"); if(channel == NULL) { crm_err("Channel was NULL"); return FALSE; } else if(channel->ch_status != IPC_CONNECT) { crm_err("Channel was disconnected"); return FALSE; } else if(need_shutdown) { crm_info("Ignoring connection request during shutdown"); return FALSE; } crm_malloc0(new_client, sizeof(attrd_client_t)); new_client->channel = channel; crm_debug_3("Created channel %p for channel %s", new_client, new_client->id); /* channel->ops->set_recv_qlen(channel, 100); */ /* channel->ops->set_send_qlen(channel, 400); */ new_client->source = G_main_add_IPC_Channel( G_PRIORITY_DEFAULT, channel, FALSE, attrd_ipc_callback, new_client, attrd_connection_destroy); crm_debug_3("Client %s connected", new_client->id); return TRUE; } static void log_hash_entry(int level, attr_hash_entry_t *entry, const char *text) { do_crm_log(level, "%s", text); do_crm_log(level, "Set: %s", entry->section); do_crm_log(level, "Name: %s", entry->id); do_crm_log(level, "Value: %s", entry->value); do_crm_log(level, "Timeout: %s", entry->dampen); } static attr_hash_entry_t * find_hash_entry(xmlNode * msg) { const char *value = NULL; const char *attr = crm_element_value(msg, F_ATTRD_ATTRIBUTE); attr_hash_entry_t *hash_entry = NULL; if(attr == NULL) { crm_info("Ignoring message with no attribute name"); return NULL; } hash_entry = g_hash_table_lookup(attr_hash, attr); if(hash_entry == NULL) { /* create one and add it */ crm_info("Creating hash entry for %s", attr); crm_malloc0(hash_entry, sizeof(attr_hash_entry_t)); hash_entry->id = crm_strdup(attr); g_hash_table_insert(attr_hash, hash_entry->id, hash_entry); hash_entry = g_hash_table_lookup(attr_hash, attr); CRM_CHECK(hash_entry != NULL, return NULL); } value = crm_element_value(msg, F_ATTRD_SET); if(value != NULL) { crm_free(hash_entry->set); hash_entry->set = crm_strdup(value); crm_debug("\t%s->set: %s", attr, value); } value = crm_element_value(msg, F_ATTRD_SECTION); if(value == NULL) { value = XML_CIB_TAG_STATUS; } crm_free(hash_entry->section); hash_entry->section = crm_strdup(value); crm_debug_2("\t%s->section: %s", attr, value); value = crm_element_value(msg, F_ATTRD_DAMPEN); if(value != NULL) { crm_free(hash_entry->dampen); hash_entry->dampen = crm_strdup(value); hash_entry->timeout = crm_get_msec(value); crm_debug_2("\t%s->timeout: %s", attr, value); } log_hash_entry(LOG_DEBUG_2, hash_entry, "Found (and updated) entry:"); return hash_entry; } #if SUPPORT_HEARTBEAT static void attrd_ha_connection_destroy(gpointer user_data) { crm_debug_3("Invoked"); if(need_shutdown) { /* we signed out, so this is expected */ crm_info("Heartbeat disconnection complete"); return; } crm_crit("Lost connection to heartbeat service!"); if (mainloop != NULL && g_main_is_running(mainloop)) { g_main_quit(mainloop); return; } exit(LSB_EXIT_OK); } static void attrd_ha_callback(HA_Message *msg, void* private_data) { attr_hash_entry_t *hash_entry = NULL; xmlNode *xml = convert_ha_message(NULL, msg, __FUNCTION__); const char *from = crm_element_value(xml, F_ORIG); const char *op = crm_element_value(xml, F_ATTRD_TASK); const char *host = crm_element_value(xml, F_ATTRD_HOST); const char *ignore = crm_element_value(xml, F_ATTRD_IGNORE_LOCALLY); if(host != NULL && safe_str_eq(host, attrd_uname)) { crm_info("Update relayed from %s", from); attrd_local_callback(xml); } else if(ignore == NULL || safe_str_neq(from, attrd_uname)) { crm_info("%s message from %s", op, from); hash_entry = find_hash_entry(xml); stop_attrd_timer(hash_entry); attrd_perform_update(hash_entry); } free_xml(xml); } #endif #if SUPPORT_AIS static gboolean attrd_ais_dispatch(AIS_Message *wrapper, char *data, int sender) { xmlNode *xml = NULL; if(wrapper->header.id == crm_class_cluster) { xml = string2xml(data); if(xml == NULL) { crm_err("Bad message received: %d:'%.120s'", wrapper->id, data); } } if(xml != NULL) { attr_hash_entry_t *hash_entry = NULL; const char *op = crm_element_value(xml, F_ATTRD_TASK); const char *host = crm_element_value(xml, F_ATTRD_HOST); const char *ignore = crm_element_value(xml, F_ATTRD_IGNORE_LOCALLY); crm_xml_add_int(xml, F_SEQ, wrapper->id); crm_xml_add(xml, F_ORIG, wrapper->sender.uname); if(host != NULL && safe_str_eq(host, attrd_uname)) { crm_info("Update relayed from %s", wrapper->sender.uname); attrd_local_callback(xml); } else if(ignore == NULL || safe_str_neq(wrapper->sender.uname, attrd_uname)) { crm_debug_2("%s message from %s", op, wrapper->sender.uname); hash_entry = find_hash_entry(xml); stop_attrd_timer(hash_entry); attrd_perform_update(hash_entry); } free_xml(xml); } return TRUE; } static void attrd_ais_destroy(gpointer unused) { ais_fd_sync = -1; if(need_shutdown) { /* we signed out, so this is expected */ crm_info("OpenAIS disconnection complete"); return; } crm_crit("Lost connection to OpenAIS service!"); if (mainloop != NULL && g_main_is_running(mainloop)) { g_main_quit(mainloop); return; } exit(LSB_EXIT_GENERIC); } #endif static void attrd_cib_connection_destroy(gpointer user_data) { if(need_shutdown) { crm_info("Connection to the CIB terminated..."); } else { /* eventually this will trigger a reconnect, not a shutdown */ crm_err("Connection to the CIB terminated..."); exit(1); } return; } static void update_for_hash_entry(gpointer key, gpointer value, gpointer user_data) { attrd_timer_callback(value); } static void do_cib_replaced(const char *event, xmlNode *msg) { crm_info("Sending full refresh"); g_hash_table_foreach(attr_hash, update_for_hash_entry, NULL); } static gboolean cib_connect(void *user_data) { static int attempts = 1; static int max_retry = 20; gboolean was_err = FALSE; static cib_t *local_conn = NULL; if(local_conn == NULL) { local_conn = cib_new(); } if(was_err == FALSE) { enum cib_errors rc = cib_not_connected; if(attempts < max_retry) { crm_debug("CIB signon attempt %d", attempts); rc = local_conn->cmds->signon(local_conn, T_ATTRD, cib_command); } if(rc != cib_ok && attempts > max_retry) { crm_err("Signon to CIB failed: %s", cib_error2string(rc)); was_err = TRUE; } else if(rc != cib_ok) { attempts++; return TRUE; } } crm_info("Connected to the CIB after %d signon attempts", attempts); if(was_err == FALSE) { enum cib_errors rc = local_conn->cmds->set_connection_dnotify( local_conn, attrd_cib_connection_destroy); if(rc != cib_ok) { crm_err("Could not set dnotify callback"); was_err = TRUE; } } if(was_err == FALSE) { if(cib_ok != local_conn->cmds->add_notify_callback( local_conn, T_CIB_REPLACE_NOTIFY, do_cib_replaced)) { crm_err("Could not set CIB notification callback"); was_err = TRUE; } } if(was_err) { crm_err("Aborting startup"); exit(100); } cib_conn = local_conn; crm_info("Sending full refresh"); g_hash_table_foreach(attr_hash, update_for_hash_entry, NULL); return FALSE; } int main(int argc, char ** argv) { int flag = 0; int argerr = 0; gboolean was_err = FALSE; char *channel_name = crm_strdup(T_ATTRD); crm_log_init(T_ATTRD, LOG_INFO, TRUE, FALSE, argc, argv); mainloop_add_signal(SIGTERM, attrd_shutdown); while ((flag = getopt(argc, argv, OPTARGS)) != EOF) { switch(flag) { case 'V': cl_log_enable_stderr(1); alter_debug(DEBUG_INC); break; case 'h': /* Help message */ usage(T_ATTRD, LSB_EXIT_OK); break; default: ++argerr; break; } } if (optind > argc) { ++argerr; } if (argerr) { usage(T_ATTRD, LSB_EXIT_GENERIC); } attr_hash = g_hash_table_new_full( g_str_hash, g_str_equal, NULL, free_hash_entry); crm_info("Starting up"); if(was_err == FALSE) { void *destroy = NULL; void *dispatch = NULL; void *data = NULL; #if SUPPORT_AIS if(is_openais_cluster()) { destroy = attrd_ais_destroy; dispatch = attrd_ais_dispatch; } #endif #if SUPPORT_HEARTBEAT if(is_heartbeat_cluster()) { data = &attrd_cluster_conn; dispatch = attrd_ha_callback; destroy = attrd_ha_connection_destroy; } #endif if(FALSE == crm_cluster_connect( &attrd_uname, &attrd_uuid, dispatch, destroy, data)) { crm_err("HA Signon failed"); was_err = TRUE; } } crm_info("Cluster connection active"); if(was_err == FALSE) { int rc = init_server_ipc_comms( channel_name, attrd_connect, default_ipc_connection_destroy); if(rc != 0) { crm_err("Could not start IPC server"); was_err = TRUE; } } crm_info("Accepting attribute updates"); mainloop = g_main_new(FALSE); if(0 == g_timeout_add_full(G_PRIORITY_LOW+1, 5000, cib_connect, NULL, NULL)) { crm_info("Adding timer failed"); was_err = TRUE; } if(was_err) { crm_err("Aborting startup"); return 100; } crm_info("Starting mainloop..."); g_main_run(mainloop); crm_info("Exiting..."); #if SUPPORT_HEARTBEAT if(is_heartbeat_cluster()) { attrd_cluster_conn->llc_ops->signoff(attrd_cluster_conn, TRUE); attrd_cluster_conn->llc_ops->delete(attrd_cluster_conn); } #endif if(cib_conn) { cib_conn->cmds->signoff(cib_conn); cib_delete(cib_conn); } g_hash_table_destroy(attr_hash); crm_free(channel_name); crm_free(attrd_uuid); empty_uuid_cache(); return 0; } struct attrd_callback_s { char *attr; char *value; }; static void attrd_cib_callback(xmlNode *msg, int call_id, int rc, xmlNode *output, void *user_data) { int err_level = LOG_ERR; attr_hash_entry_t *hash_entry = NULL; struct attrd_callback_s *data = user_data; if(data->value == NULL && rc == cib_NOTEXISTS) { rc = cib_ok; } switch(rc) { case cib_ok: crm_debug("Update %d for %s=%s passed", call_id, data->attr, data->value); hash_entry = g_hash_table_lookup(attr_hash, data->attr); if(hash_entry) { crm_free(hash_entry->stored_value); hash_entry->stored_value = NULL; if(data->value != NULL) { hash_entry->stored_value = crm_strdup(data->value); } } break; case cib_diff_failed: /* When an attr changes while the CIB is syncing */ case cib_remote_timeout: /* When an attr changes while there is a DC election */ case cib_NOTEXISTS: /* When an attr changes while the CIB is syncing a * newer config from a node that just came up */ err_level = LOG_WARNING; default: do_crm_log(err_level, "Update %d for %s=%s failed: %s", call_id, data->attr, data->value, cib_error2string(rc)); } crm_free(data->value); crm_free(data->attr); crm_free(data); } void attrd_perform_update(attr_hash_entry_t *hash_entry) { int rc = cib_ok; struct attrd_callback_s *data = NULL; if(hash_entry == NULL) { return; } else if(cib_conn == NULL) { crm_info("Delaying operation %s=%s: cib not connected", hash_entry->id, crm_str(hash_entry->value)); return; } else if(hash_entry->value == NULL) { /* delete the attr */ rc = delete_attr(cib_conn, cib_none, hash_entry->section, attrd_uuid, hash_entry->set, hash_entry->uuid, hash_entry->id, NULL, FALSE); if(hash_entry->stored_value) { crm_info("Sent delete %d: node=%s, attr=%s, id=%s, set=%s, section=%s", rc, attrd_uuid, hash_entry->id, hash_entry->uuid?hash_entry->uuid:"", hash_entry->set, hash_entry->section); } else if(rc < 0 && rc != cib_NOTEXISTS) { crm_info("Delete operation failed: node=%s, attr=%s, id=%s, set=%s, section=%s: %s (%d)", attrd_uuid, hash_entry->id, hash_entry->uuid?hash_entry->uuid:"", hash_entry->set, hash_entry->section, cib_error2string(rc), rc); } else { crm_debug_2("Sent delete %d: node=%s, attr=%s, id=%s, set=%s, section=%s", rc, attrd_uuid, hash_entry->id, hash_entry->uuid?hash_entry->uuid:"", hash_entry->set, hash_entry->section); } } else { /* send update */ rc = update_attr(cib_conn, cib_none, hash_entry->section, attrd_uuid, hash_entry->set, hash_entry->uuid, hash_entry->id, hash_entry->value, FALSE); if(safe_str_neq(hash_entry->value, hash_entry->stored_value) || rc < 0) { crm_info("Sent update %d: %s=%s", rc, hash_entry->id, hash_entry->value); } else { crm_debug_2("Sent update %d: %s=%s", rc, hash_entry->id, hash_entry->value); } } crm_malloc0(data, sizeof(struct attrd_callback_s)); data->attr = crm_strdup(hash_entry->id); if(hash_entry->value != NULL) { data->value = crm_strdup(hash_entry->value); } add_cib_op_callback(cib_conn, rc, FALSE, data, attrd_cib_callback); return; } void attrd_local_callback(xmlNode * msg) { static int plus_plus_len = 5; attr_hash_entry_t *hash_entry = NULL; const char *from = crm_element_value(msg, F_ORIG); const char *op = crm_element_value(msg, F_ATTRD_TASK); const char *attr = crm_element_value(msg, F_ATTRD_ATTRIBUTE); const char *value = crm_element_value(msg, F_ATTRD_VALUE); const char *host = crm_element_value(msg, F_ATTRD_HOST); if(safe_str_eq(op, "refresh")) { crm_info("Sending full refresh (origin=%s)", from); g_hash_table_foreach(attr_hash, update_for_hash_entry, NULL); return; } if(host != NULL && safe_str_neq(host, attrd_uname)) { send_cluster_message(host, crm_msg_attrd, msg, FALSE); return; } crm_debug("%s message from %s: %s=%s", op, from, attr, crm_str(value)); hash_entry = find_hash_entry(msg); if(hash_entry == NULL) { return; } if(hash_entry->uuid == NULL) { const char *key = crm_element_value(msg, F_ATTRD_KEY); if(key) { hash_entry->uuid = crm_strdup(key); } } crm_debug("Supplied: %s, Current: %s, Stored: %s", value, hash_entry->value, hash_entry->stored_value); - if(safe_str_eq(value, hash_entry->value)) { + if(safe_str_eq(value, hash_entry->value) + && safe_str_eq(value, hash_entry->stored_value)) { crm_debug_2("Ignoring non-change"); return; } else if(value) { int offset = 1; int int_value = 0; int value_len = strlen(value); if(value_len < (plus_plus_len + 2) || value[plus_plus_len] != '+' || (value[plus_plus_len+1] != '+' && value[plus_plus_len+1] != '=')) { goto set_unexpanded; } int_value = char2score(hash_entry->value); if(value[plus_plus_len+1] != '+') { const char *offset_s = value+(plus_plus_len+2); offset = char2score(offset_s); } int_value += offset; if(int_value > INFINITY) { int_value = INFINITY; } crm_info("Expanded %s=%s to %d", attr, value, int_value); crm_xml_add_int(msg, F_ATTRD_VALUE, int_value); value = crm_element_value(msg, F_ATTRD_VALUE); } set_unexpanded: crm_free(hash_entry->value); hash_entry->value = NULL; if(value != NULL) { hash_entry->value = crm_strdup(value); crm_debug("New value of %s is %s", attr, value); } stop_attrd_timer(hash_entry); if(hash_entry->timeout > 0) { hash_entry->timer_id = g_timeout_add( hash_entry->timeout, attrd_timer_callback, hash_entry); } else { attrd_trigger_update(hash_entry); } return; } gboolean attrd_timer_callback(void *user_data) { stop_attrd_timer(user_data); attrd_trigger_update(user_data); return TRUE; /* Always return true, removed cleanly by stop_attrd_timer() */ } gboolean attrd_trigger_update(attr_hash_entry_t *hash_entry) { xmlNode *msg = NULL; /* send HA message to everyone */ crm_info("Sending flush op to all hosts for: %s (%s)", hash_entry->id, crm_str(hash_entry->value)); log_hash_entry(LOG_DEBUG_2, hash_entry, "Sending flush op to all hosts for:"); msg = create_xml_node(NULL, __FUNCTION__); crm_xml_add(msg, F_TYPE, T_ATTRD); crm_xml_add(msg, F_ORIG, attrd_uname); crm_xml_add(msg, F_ATTRD_TASK, "flush"); crm_xml_add(msg, F_ATTRD_ATTRIBUTE, hash_entry->id); crm_xml_add(msg, F_ATTRD_SET, hash_entry->set); crm_xml_add(msg, F_ATTRD_SECTION, hash_entry->section); crm_xml_add(msg, F_ATTRD_DAMPEN, hash_entry->dampen); crm_xml_add(msg, F_ATTRD_VALUE, hash_entry->value); if(hash_entry->timeout <= 0) { crm_xml_add(msg, F_ATTRD_IGNORE_LOCALLY, hash_entry->value); attrd_perform_update(hash_entry); } send_cluster_message(NULL, crm_msg_attrd, msg, FALSE); free_xml(msg); return TRUE; }