diff --git a/exec/vsf_quorum.c b/exec/vsf_quorum.c index a6c739d6..e268deac 100644 --- a/exec/vsf_quorum.c +++ b/exec/vsf_quorum.c @@ -1,488 +1,488 @@ /* * Copyright (c) 2008-2015 Red Hat, Inc. * * All rights reserved. * * Author: Christine Caulfield (ccaulfie@redhat.com) * * This software licensed under BSD license, the text of which follows: * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * - Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * - Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * - Neither the name of Red Hat Inc. nor the names of its * contributors may be used to endorse or promote products derived from this * software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF * THE POSSIBILITY OF SUCH DAMAGE. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "quorum.h" #include #include #include #include #include #include #include #include #include #include #include #include "service.h" #include "votequorum.h" #include "vsf_ykd.h" LOGSYS_DECLARE_SUBSYS ("QUORUM"); struct quorum_pd { unsigned char track_flags; int tracking_enabled; struct list_head list; void *conn; }; struct internal_callback_pd { struct list_head list; quorum_callback_fn_t callback; void *context; }; static void message_handler_req_lib_quorum_getquorate (void *conn, const void *msg); static void message_handler_req_lib_quorum_trackstart (void *conn, const void *msg); static void message_handler_req_lib_quorum_trackstop (void *conn, const void *msg); static void message_handler_req_lib_quorum_gettype (void *conn, const void *msg); static void send_library_notification(void *conn); static void send_internal_notification(void); static char *quorum_exec_init_fn (struct corosync_api_v1 *api); static int quorum_lib_init_fn (void *conn); static int quorum_lib_exit_fn (void *conn); static int primary_designated = 0; static int quorum_type = 0; static struct corosync_api_v1 *corosync_api; static struct list_head lib_trackers_list; static struct list_head internal_trackers_list; static struct memb_ring_id quorum_ring_id; static size_t quorum_view_list_entries = 0; static int quorum_view_list[PROCESSOR_COUNT_MAX]; struct quorum_services_api_ver1 *quorum_iface = NULL; static char view_buf[64]; static void log_view_list(const unsigned int *view_list, size_t view_list_entries) { int total = (int)view_list_entries; int len, pos, ret; int i = 0; while (1) { len = sizeof(view_buf); pos = 0; memset(view_buf, 0, len); for (; i < total; i++) { - ret = snprintf(view_buf + pos, len - pos, " %d", view_list[i]); + ret = snprintf(view_buf + pos, len - pos, " %u", view_list[i]); if (ret >= len - pos) break; pos += ret; } log_printf (LOGSYS_LEVEL_NOTICE, "Members[%d]:%s%s", total, view_buf, i < total ? "\\" : ""); if (i == total) break; } } /* Internal quorum API function */ static void quorum_api_set_quorum(const unsigned int *view_list, size_t view_list_entries, int quorum, struct memb_ring_id *ring_id) { int old_quorum = primary_designated; primary_designated = quorum; if (primary_designated && !old_quorum) { log_printf (LOGSYS_LEVEL_NOTICE, "This node is within the primary component and will provide service."); } else if (!primary_designated && old_quorum) { log_printf (LOGSYS_LEVEL_NOTICE, "This node is within the non-primary component and will NOT provide any services."); } quorum_view_list_entries = view_list_entries; memcpy(&quorum_ring_id, ring_id, sizeof (quorum_ring_id)); memcpy(quorum_view_list, view_list, sizeof(unsigned int)*view_list_entries); log_view_list(view_list, view_list_entries); /* Tell internal listeners */ send_internal_notification(); /* Tell IPC listeners */ send_library_notification(NULL); } static struct corosync_lib_handler quorum_lib_service[] = { { /* 0 */ .lib_handler_fn = message_handler_req_lib_quorum_getquorate, .flow_control = CS_LIB_FLOW_CONTROL_NOT_REQUIRED }, { /* 1 */ .lib_handler_fn = message_handler_req_lib_quorum_trackstart, .flow_control = CS_LIB_FLOW_CONTROL_NOT_REQUIRED }, { /* 2 */ .lib_handler_fn = message_handler_req_lib_quorum_trackstop, .flow_control = CS_LIB_FLOW_CONTROL_NOT_REQUIRED }, { /* 3 */ .lib_handler_fn = message_handler_req_lib_quorum_gettype, .flow_control = CS_LIB_FLOW_CONTROL_NOT_REQUIRED } }; static struct corosync_service_engine quorum_service_handler = { .name = "corosync cluster quorum service v0.1", .id = QUORUM_SERVICE, .priority = 1, .private_data_size = sizeof (struct quorum_pd), .flow_control = CS_LIB_FLOW_CONTROL_NOT_REQUIRED, .allow_inquorate = CS_LIB_ALLOW_INQUORATE, .lib_init_fn = quorum_lib_init_fn, .lib_exit_fn = quorum_lib_exit_fn, .lib_engine = quorum_lib_service, .exec_init_fn = quorum_exec_init_fn, .lib_engine_count = sizeof (quorum_lib_service) / sizeof (struct corosync_lib_handler) }; struct corosync_service_engine *vsf_quorum_get_service_engine_ver0 (void) { return (&quorum_service_handler); } /* -------------------------------------------------- */ /* * Internal API functions for corosync */ static int quorum_quorate(void) { return primary_designated; } static int quorum_register_callback(quorum_callback_fn_t function, void *context) { struct internal_callback_pd *pd = malloc(sizeof(struct internal_callback_pd)); if (!pd) return -1; pd->context = context; pd->callback = function; list_add (&pd->list, &internal_trackers_list); return 0; } static int quorum_unregister_callback(quorum_callback_fn_t function, void *context) { struct internal_callback_pd *pd; struct list_head *tmp; for (tmp = internal_trackers_list.next; tmp != &internal_trackers_list; tmp = tmp->next) { pd = list_entry(tmp, struct internal_callback_pd, list); if (pd->callback == function && pd->context == context) { list_del(&pd->list); free(pd); return 0; } } return -1; } static struct quorum_callin_functions callins = { .quorate = quorum_quorate, .register_callback = quorum_register_callback, .unregister_callback = quorum_unregister_callback }; /* --------------------------------------------------------------------- */ static char *quorum_exec_init_fn (struct corosync_api_v1 *api) { char *quorum_module = NULL; char *error; corosync_api = api; list_init (&lib_trackers_list); list_init (&internal_trackers_list); /* * Tell corosync we have a quorum engine. */ api->quorum_initialize(&callins); /* * Look for a quorum provider */ if (icmap_get_string("quorum.provider", &quorum_module) == CS_OK) { log_printf (LOGSYS_LEVEL_NOTICE, "Using quorum provider %s", quorum_module); error = (char *)"Invalid quorum provider"; if (strcmp (quorum_module, "corosync_votequorum") == 0) { error = votequorum_init (api, quorum_api_set_quorum); quorum_type = 1; } if (strcmp (quorum_module, "corosync_ykd") == 0) { error = ykd_init (api, quorum_api_set_quorum); quorum_type = 1; } if (error) { log_printf (LOGSYS_LEVEL_CRIT, "Quorum provider: %s failed to initialize.", quorum_module); free(quorum_module); return (error); } } if (quorum_module) { free(quorum_module); quorum_module = NULL; } /* * setting quorum_type and primary_designated in the right order is important * always try to lookup/init a quorum module, then revert back to be quorate */ if (quorum_type == 0) { primary_designated = 1; } return (NULL); } static int quorum_lib_init_fn (void *conn) { struct quorum_pd *pd = (struct quorum_pd *)corosync_api->ipc_private_data_get (conn); log_printf(LOGSYS_LEVEL_DEBUG, "lib_init_fn: conn=%p", conn); list_init (&pd->list); pd->conn = conn; return (0); } static int quorum_lib_exit_fn (void *conn) { struct quorum_pd *quorum_pd = (struct quorum_pd *)corosync_api->ipc_private_data_get (conn); log_printf(LOGSYS_LEVEL_DEBUG, "lib_exit_fn: conn=%p", conn); if (quorum_pd->tracking_enabled) { list_del (&quorum_pd->list); list_init (&quorum_pd->list); } return (0); } static void send_internal_notification(void) { struct list_head *tmp; struct internal_callback_pd *pd; for (tmp = internal_trackers_list.next; tmp != &internal_trackers_list; tmp = tmp->next) { pd = list_entry(tmp, struct internal_callback_pd, list); pd->callback(primary_designated, pd->context); } } static void send_library_notification(void *conn) { int size = sizeof(struct res_lib_quorum_notification) + sizeof(unsigned int)*quorum_view_list_entries; char buf[size]; struct res_lib_quorum_notification *res_lib_quorum_notification = (struct res_lib_quorum_notification *)buf; struct list_head *tmp; int i; log_printf(LOGSYS_LEVEL_DEBUG, "sending quorum notification to %p, length = %d", conn, size); res_lib_quorum_notification->quorate = primary_designated; res_lib_quorum_notification->ring_seq = quorum_ring_id.seq; res_lib_quorum_notification->view_list_entries = quorum_view_list_entries; for (i=0; iview_list[i] = quorum_view_list[i]; } res_lib_quorum_notification->header.id = MESSAGE_RES_QUORUM_NOTIFICATION; res_lib_quorum_notification->header.size = size; res_lib_quorum_notification->header.error = CS_OK; /* Send it to all interested parties */ if (conn) { corosync_api->ipc_dispatch_send(conn, res_lib_quorum_notification, size); } else { struct quorum_pd *qpd; for (tmp = lib_trackers_list.next; tmp != &lib_trackers_list; tmp = tmp->next) { qpd = list_entry(tmp, struct quorum_pd, list); corosync_api->ipc_dispatch_send(qpd->conn, res_lib_quorum_notification, size); } } return; } static void message_handler_req_lib_quorum_getquorate (void *conn, const void *msg) { struct res_lib_quorum_getquorate res_lib_quorum_getquorate; log_printf(LOGSYS_LEVEL_DEBUG, "got quorate request on %p", conn); /* send status */ res_lib_quorum_getquorate.quorate = primary_designated; res_lib_quorum_getquorate.header.size = sizeof(res_lib_quorum_getquorate); res_lib_quorum_getquorate.header.id = MESSAGE_RES_QUORUM_GETQUORATE; res_lib_quorum_getquorate.header.error = CS_OK; corosync_api->ipc_response_send(conn, &res_lib_quorum_getquorate, sizeof(res_lib_quorum_getquorate)); } static void message_handler_req_lib_quorum_trackstart (void *conn, const void *msg) { const struct req_lib_quorum_trackstart *req_lib_quorum_trackstart = msg; struct qb_ipc_response_header res; struct quorum_pd *quorum_pd = (struct quorum_pd *)corosync_api->ipc_private_data_get (conn); cs_error_t error = CS_OK; log_printf(LOGSYS_LEVEL_DEBUG, "got trackstart request on %p", conn); /* * If an immediate listing of the current cluster membership * is requested, generate membership list */ if (req_lib_quorum_trackstart->track_flags & CS_TRACK_CURRENT || req_lib_quorum_trackstart->track_flags & CS_TRACK_CHANGES) { log_printf(LOGSYS_LEVEL_DEBUG, "sending initial status to %p", conn); send_library_notification(conn); } if (quorum_pd->tracking_enabled) { error = CS_ERR_EXIST; goto response_send; } /* * Record requests for tracking */ if (req_lib_quorum_trackstart->track_flags & CS_TRACK_CHANGES || req_lib_quorum_trackstart->track_flags & CS_TRACK_CHANGES_ONLY) { quorum_pd->track_flags = req_lib_quorum_trackstart->track_flags; quorum_pd->tracking_enabled = 1; list_add (&quorum_pd->list, &lib_trackers_list); } response_send: /* send status */ res.size = sizeof(res); res.id = MESSAGE_RES_QUORUM_TRACKSTART; res.error = error; corosync_api->ipc_response_send(conn, &res, sizeof(struct qb_ipc_response_header)); } static void message_handler_req_lib_quorum_trackstop (void *conn, const void *msg) { struct qb_ipc_response_header res; struct quorum_pd *quorum_pd = (struct quorum_pd *)corosync_api->ipc_private_data_get (conn); log_printf(LOGSYS_LEVEL_DEBUG, "got trackstop request on %p", conn); if (quorum_pd->tracking_enabled) { res.error = CS_OK; quorum_pd->tracking_enabled = 0; list_del (&quorum_pd->list); list_init (&quorum_pd->list); } else { res.error = CS_ERR_NOT_EXIST; } /* send status */ res.size = sizeof(res); res.id = MESSAGE_RES_QUORUM_TRACKSTOP; res.error = CS_OK; corosync_api->ipc_response_send(conn, &res, sizeof(struct qb_ipc_response_header)); } static void message_handler_req_lib_quorum_gettype (void *conn, const void *msg) { struct res_lib_quorum_gettype res_lib_quorum_gettype; log_printf(LOGSYS_LEVEL_DEBUG, "got quorum_type request on %p", conn); /* send status */ res_lib_quorum_gettype.quorum_type = quorum_type; res_lib_quorum_gettype.header.size = sizeof(res_lib_quorum_gettype); res_lib_quorum_gettype.header.id = MESSAGE_RES_QUORUM_GETTYPE; res_lib_quorum_gettype.header.error = CS_OK; corosync_api->ipc_response_send(conn, &res_lib_quorum_gettype, sizeof(res_lib_quorum_gettype)); }