Adding upstream version 3.1.8.upstream/3.1.8upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 549 insertions, 0 deletions

diff --git a/exec/sync.c b/exec/sync.c
new file mode 100644
index 0000000..962f341
--- /dev/null
+++ b/exec/sync.c
@@ -0,0 +1,549 @@
+/*
+ * Copyright (c) 2009-2012 Red Hat, Inc.
+ *
+ * All rights reserved.
+ *
+ * Author: Steven Dake (sdake@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 the MontaVista Software, 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 <config.h>
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <sys/ioctl.h>
+#include <netinet/in.h>
+#include <sys/uio.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <errno.h>
+#include <time.h>
+#include <arpa/inet.h>
+
+#include <corosync/corotypes.h>
+#include <corosync/swab.h>
+#include <corosync/totem/totempg.h>
+#include <corosync/totem/totem.h>
+#include <corosync/logsys.h>
+#include <qb/qbipc_common.h>
+#include "schedwrk.h"
+#include "quorum.h"
+#include "sync.h"
+#include "main.h"
+
+LOGSYS_DECLARE_SUBSYS ("SYNC");
+
+#define MESSAGE_REQ_SYNC_BARRIER 0
+#define MESSAGE_REQ_SYNC_SERVICE_BUILD 1
+
+enum sync_process_state {
+	PROCESS,
+	ACTIVATE
+};
+
+enum sync_state {
+	SYNC_SERVICELIST_BUILD,
+	SYNC_PROCESS,
+	SYNC_BARRIER
+};
+
+struct service_entry {
+	int service_id;
+	void (*sync_init) (
+		const unsigned int *trans_list,
+		size_t trans_list_entries,
+		const unsigned int *member_list,
+		size_t member_list_entries,
+		const struct memb_ring_id *ring_id);
+	void (*sync_abort) (void);
+	int (*sync_process) (void);
+	void (*sync_activate) (void);
+	enum sync_process_state state;
+	char name[128];
+};
+
+struct processor_entry {
+	int nodeid;
+	int received;
+};
+
+struct req_exec_service_build_message {
+	struct qb_ipc_request_header header __attribute__((aligned(8)));
+	struct memb_ring_id ring_id __attribute__((aligned(8)));
+	int service_list_entries __attribute__((aligned(8)));
+	int service_list[128] __attribute__((aligned(8)));
+};
+
+struct req_exec_barrier_message {
+	struct qb_ipc_request_header header __attribute__((aligned(8)));
+	struct memb_ring_id ring_id __attribute__((aligned(8)));
+};
+
+static enum sync_state my_state = SYNC_BARRIER;
+
+static struct memb_ring_id my_ring_id;
+
+static int my_processing_idx = 0;
+
+static hdb_handle_t my_schedwrk_handle;
+
+static struct processor_entry my_processor_list[PROCESSOR_COUNT_MAX];
+
+static unsigned int my_member_list[PROCESSOR_COUNT_MAX];
+
+static unsigned int my_trans_list[PROCESSOR_COUNT_MAX];
+
+static size_t my_member_list_entries = 0;
+
+static size_t my_trans_list_entries = 0;
+
+static int my_processor_list_entries = 0;
+
+static struct service_entry my_service_list[SERVICES_COUNT_MAX];
+
+static int my_service_list_entries = 0;
+
+static void (*sync_synchronization_completed) (void);
+
+static void sync_deliver_fn (
+	unsigned int nodeid,
+	const void *msg,
+	unsigned int msg_len,
+	int endian_conversion_required);
+
+static int schedwrk_processor (const void *context);
+
+static void sync_process_enter (void);
+
+static void sync_process_call_init (void);
+
+static struct totempg_group sync_group = {
+    .group      = "sync",
+    .group_len  = 4
+};
+
+static void *sync_group_handle;
+
+int (*my_sync_callbacks_retrieve) (
+		int service_id,
+                struct sync_callbacks *callbacks);
+
+int sync_init (
+        int (*sync_callbacks_retrieve) (
+                int service_id,
+                struct sync_callbacks *callbacks),
+        void (*synchronization_completed) (void))
+{
+	unsigned int res;
+
+	res = totempg_groups_initialize (
+		&sync_group_handle,
+		sync_deliver_fn,
+		NULL);
+	if (res == -1) {
+		log_printf (LOGSYS_LEVEL_ERROR,
+			"Couldn't initialize groups interface.");
+		return (-1);
+	}
+
+	res = totempg_groups_join (
+		sync_group_handle,
+		&sync_group,
+		1);
+	if (res == -1) {
+		log_printf (LOGSYS_LEVEL_ERROR, "Couldn't join group.");
+		return (-1);
+	}
+
+	sync_synchronization_completed = synchronization_completed;
+	my_sync_callbacks_retrieve = sync_callbacks_retrieve;
+
+	return (0);
+}
+
+static void sync_barrier_handler (unsigned int nodeid, const void *msg)
+{
+	const struct req_exec_barrier_message *req_exec_barrier_message = msg;
+	int i;
+	int barrier_reached = 1;
+
+	if (memcmp (&my_ring_id, &req_exec_barrier_message->ring_id,
+		sizeof (struct memb_ring_id)) != 0) {
+
+		log_printf (LOGSYS_LEVEL_DEBUG, "barrier for old ring - discarding");
+		return;
+	}
+	for (i = 0; i < my_processor_list_entries; i++) {
+		if (my_processor_list[i].nodeid == nodeid) {
+			my_processor_list[i].received = 1;
+		}
+	}
+	for (i = 0; i < my_processor_list_entries; i++) {
+		if (my_processor_list[i].received == 0) {
+			barrier_reached = 0;
+		}
+	}
+	if (barrier_reached) {
+		log_printf (LOGSYS_LEVEL_DEBUG, "Committing synchronization for %s",
+			my_service_list[my_processing_idx].name);
+		my_service_list[my_processing_idx].state = ACTIVATE;
+
+		if (my_sync_callbacks_retrieve(my_service_list[my_processing_idx].service_id, NULL) != -1) {
+			my_service_list[my_processing_idx].sync_activate ();
+		}
+
+		my_processing_idx += 1;
+		if (my_service_list_entries == my_processing_idx) {
+			sync_synchronization_completed ();
+		} else {
+			sync_process_enter ();
+		}
+	}
+}
+
+static void dummy_sync_abort (void)
+{
+}
+
+static int dummy_sync_process (void)
+{
+	return (0);
+}
+
+static void dummy_sync_activate (void)
+{
+}
+
+static int service_entry_compare (const void *a, const void *b)
+{
+	const struct service_entry *service_entry_a = a;
+	const struct service_entry *service_entry_b = b;
+
+	return (service_entry_a->service_id > service_entry_b->service_id);
+}
+
+static void sync_service_build_handler (unsigned int nodeid, const void *msg)
+{
+	const struct req_exec_service_build_message *req_exec_service_build_message = msg;
+	int i, j;
+	int barrier_reached = 1;
+	int found;
+	int qsort_trigger = 0;
+
+	if (memcmp (&my_ring_id, &req_exec_service_build_message->ring_id,
+		sizeof (struct memb_ring_id)) != 0) {
+		log_printf (LOGSYS_LEVEL_DEBUG, "service build for old ring - discarding");
+		return;
+	}
+	for (i = 0; i < req_exec_service_build_message->service_list_entries; i++) {
+
+		found = 0;
+		for (j = 0; j < my_service_list_entries; j++) {
+			if (req_exec_service_build_message->service_list[i] ==
+				my_service_list[j].service_id) {
+				found = 1;
+				break;
+			}
+		}
+		if (found == 0) {
+			my_service_list[my_service_list_entries].state = PROCESS;
+			my_service_list[my_service_list_entries].service_id =
+				req_exec_service_build_message->service_list[i];
+			sprintf (my_service_list[my_service_list_entries].name,
+				"Unknown External Service (id = %d)\n",
+				req_exec_service_build_message->service_list[i]);
+			my_service_list[my_service_list_entries].sync_init =
+				NULL;
+			my_service_list[my_service_list_entries].sync_abort =
+				dummy_sync_abort;
+			my_service_list[my_service_list_entries].sync_process =
+				dummy_sync_process;
+			my_service_list[my_service_list_entries].sync_activate =
+				dummy_sync_activate;
+			my_service_list_entries += 1;
+
+			qsort_trigger = 1;
+		}
+	}
+	if (qsort_trigger) {
+		qsort (my_service_list, my_service_list_entries,
+			sizeof (struct service_entry), service_entry_compare);
+	}
+	for (i = 0; i < my_processor_list_entries; i++) {
+		if (my_processor_list[i].nodeid == nodeid) {
+			my_processor_list[i].received = 1;
+		}
+	}
+	for (i = 0; i < my_processor_list_entries; i++) {
+		if (my_processor_list[i].received == 0) {
+			barrier_reached = 0;
+		}
+	}
+	if (barrier_reached) {
+		log_printf (LOGSYS_LEVEL_DEBUG, "enter sync process");
+		sync_process_enter ();
+	}
+}
+
+static void sync_deliver_fn (
+	unsigned int nodeid,
+	const void *msg,
+	unsigned int msg_len,
+	int endian_conversion_required)
+{
+	struct qb_ipc_request_header *header = (struct qb_ipc_request_header *)msg;
+
+	switch (header->id) {
+		case MESSAGE_REQ_SYNC_BARRIER:
+			sync_barrier_handler (nodeid, msg);
+			break;
+		case MESSAGE_REQ_SYNC_SERVICE_BUILD:
+			sync_service_build_handler (nodeid, msg);
+			break;
+	}
+}
+
+static void barrier_message_transmit (void)
+{
+	struct iovec iovec;
+	struct req_exec_barrier_message req_exec_barrier_message;
+
+	memset(&req_exec_barrier_message, 0, sizeof(req_exec_barrier_message));
+
+	req_exec_barrier_message.header.size = sizeof (struct req_exec_barrier_message);
+	req_exec_barrier_message.header.id = MESSAGE_REQ_SYNC_BARRIER;
+
+	memcpy (&req_exec_barrier_message.ring_id, &my_ring_id,
+		sizeof (struct memb_ring_id));
+
+	iovec.iov_base = (char *)&req_exec_barrier_message;
+	iovec.iov_len = sizeof (req_exec_barrier_message);
+
+	(void)totempg_groups_mcast_joined (sync_group_handle,
+		&iovec, 1, TOTEMPG_AGREED);
+}
+
+static void service_build_message_transmit (struct req_exec_service_build_message *service_build_message)
+{
+	struct iovec iovec;
+
+	service_build_message->header.size = sizeof (struct req_exec_service_build_message);
+	service_build_message->header.id = MESSAGE_REQ_SYNC_SERVICE_BUILD;
+
+	memcpy (&service_build_message->ring_id, &my_ring_id,
+		sizeof (struct memb_ring_id));
+
+	iovec.iov_base = (void *)service_build_message;
+	iovec.iov_len = sizeof (struct req_exec_service_build_message);
+
+	(void)totempg_groups_mcast_joined (sync_group_handle,
+		&iovec, 1, TOTEMPG_AGREED);
+}
+
+static void sync_barrier_enter (void)
+{
+	my_state = SYNC_BARRIER;
+	barrier_message_transmit ();
+}
+
+static void sync_process_call_init (void)
+{
+	unsigned int old_trans_list[PROCESSOR_COUNT_MAX];
+	size_t old_trans_list_entries = 0;
+	int o, m;
+	int i;
+
+	memcpy (old_trans_list, my_trans_list, my_trans_list_entries *
+		sizeof (unsigned int));
+	old_trans_list_entries = my_trans_list_entries;
+
+	my_trans_list_entries = 0;
+	for (o = 0; o < old_trans_list_entries; o++) {
+		for (m = 0; m < my_member_list_entries; m++) {
+			if (old_trans_list[o] == my_member_list[m]) {
+				my_trans_list[my_trans_list_entries] = my_member_list[m];
+				my_trans_list_entries++;
+				break;
+			}
+		}
+	}
+
+	for (i = 0; i < my_service_list_entries; i++) {
+		if (my_sync_callbacks_retrieve(my_service_list[i].service_id, NULL) != -1) {
+			my_service_list[i].sync_init (my_trans_list,
+				my_trans_list_entries, my_member_list,
+				my_member_list_entries,
+				&my_ring_id);
+		}
+	}
+}
+
+static void sync_process_enter (void)
+{
+	int i;
+
+	my_state = SYNC_PROCESS;
+
+	/*
+	 * No sync services
+	 */
+	if (my_service_list_entries == 0) {
+		my_state = SYNC_SERVICELIST_BUILD;
+		sync_synchronization_completed ();
+		return;
+	}
+	for (i = 0; i < my_processor_list_entries; i++) {
+		my_processor_list[i].received = 0;
+	}
+
+	schedwrk_create (&my_schedwrk_handle,
+		schedwrk_processor,
+		NULL);
+}
+
+static void sync_servicelist_build_enter (
+	const unsigned int *member_list,
+	size_t member_list_entries,
+	const struct memb_ring_id *ring_id)
+{
+	struct req_exec_service_build_message service_build;
+	int i;
+	int res;
+	struct sync_callbacks sync_callbacks;
+
+	memset(&service_build, 0, sizeof(service_build));
+
+	my_state = SYNC_SERVICELIST_BUILD;
+	for (i = 0; i < member_list_entries; i++) {
+		my_processor_list[i].nodeid = member_list[i];
+		my_processor_list[i].received = 0;
+	}
+	my_processor_list_entries = member_list_entries;
+
+	memcpy (my_member_list, member_list,
+		member_list_entries * sizeof (unsigned int));
+	my_member_list_entries = member_list_entries;
+
+	my_processing_idx = 0;
+
+	memset(my_service_list, 0, sizeof (struct service_entry) * SERVICES_COUNT_MAX);
+	my_service_list_entries = 0;
+
+	for (i = 0; i < SERVICES_COUNT_MAX; i++) {
+		res = my_sync_callbacks_retrieve (i, &sync_callbacks);
+		if (res == -1) {
+			continue;
+		}
+		if (sync_callbacks.sync_init == NULL) {
+			continue;
+		}
+		my_service_list[my_service_list_entries].state = PROCESS;
+		my_service_list[my_service_list_entries].service_id = i;
+
+		assert(strlen(sync_callbacks.name) < sizeof(my_service_list[my_service_list_entries].name));
+
+		strcpy (my_service_list[my_service_list_entries].name,
+			sync_callbacks.name);
+		my_service_list[my_service_list_entries].sync_init = sync_callbacks.sync_init;
+		my_service_list[my_service_list_entries].sync_process = sync_callbacks.sync_process;
+		my_service_list[my_service_list_entries].sync_abort = sync_callbacks.sync_abort;
+		my_service_list[my_service_list_entries].sync_activate = sync_callbacks.sync_activate;
+		my_service_list_entries += 1;
+	}
+
+	for (i = 0; i < my_service_list_entries; i++) {
+		service_build.service_list[i] =
+			my_service_list[i].service_id;
+	}
+	service_build.service_list_entries = my_service_list_entries;
+
+	service_build_message_transmit (&service_build);
+
+	log_printf (LOGSYS_LEVEL_DEBUG, "call init for locally known services");
+	sync_process_call_init ();
+}
+
+static int schedwrk_processor (const void *context)
+{
+	int res = 0;
+
+	if (my_service_list[my_processing_idx].state == PROCESS) {
+		if (my_sync_callbacks_retrieve(my_service_list[my_processing_idx].service_id, NULL) != -1) {
+			res = my_service_list[my_processing_idx].sync_process ();
+		} else {
+			res = 0;
+		}
+		if (res == 0) {
+			sync_barrier_enter();
+		} else {
+			return (-1);
+		}
+	}
+	return (0);
+}
+
+void sync_start (
+        const unsigned int *member_list,
+        size_t member_list_entries,
+        const struct memb_ring_id *ring_id)
+{
+	ENTER();
+	memcpy (&my_ring_id, ring_id, sizeof (struct memb_ring_id));
+
+	sync_servicelist_build_enter (member_list, member_list_entries,
+		ring_id);
+}
+
+void sync_save_transitional (
+        const unsigned int *member_list,
+        size_t member_list_entries,
+        const struct memb_ring_id *ring_id)
+{
+	ENTER();
+	memcpy (my_trans_list, member_list, member_list_entries *
+		sizeof (unsigned int));
+	my_trans_list_entries = member_list_entries;
+}
+
+void sync_abort (void)
+{
+	ENTER();
+	if (my_state == SYNC_PROCESS) {
+		schedwrk_destroy (my_schedwrk_handle);
+		if (my_sync_callbacks_retrieve(my_service_list[my_processing_idx].service_id, NULL) != -1) {
+			my_service_list[my_processing_idx].sync_abort ();
+		}
+	}
+
+	/* this will cause any "old" barrier messages from causing
+	 * problems.
+	 */
+	memset (&my_ring_id, 0,	sizeof (struct memb_ring_id));
+}