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+/*
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+ * Copyright (c) 2015-2020 Red Hat, Inc.
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+ *
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+ * All rights reserved.
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+ *
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+ * Author: Jan Friesse (jfriesse@redhat.com)
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+ *
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+ * This software licensed under BSD license, the text of which follows:
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+ *
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+ * Redistribution and use in source and binary forms, with or without
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+ * modification, are permitted provided that the following conditions are met:
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+ *
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+ * - Redistributions of source code must retain the above copyright notice,
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+ * this list of conditions and the following disclaimer.
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+ * - Redistributions in binary form must reproduce the above copyright notice,
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+ * this list of conditions and the following disclaimer in the documentation
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+ * and/or other materials provided with the distribution.
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+ * - Neither the name of the Red Hat, Inc. nor the names of its
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+ * contributors may be used to endorse or promote products derived from this
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+ * software without specific prior written permission.
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+ *
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+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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+ * THE POSSIBILITY OF SUCH DAMAGE.
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+ */
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+
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+#include "log.h"
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+#include "qdevice-heuristics-cmd.h"
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+#include "qdevice-heuristics-log.h"
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+#include "qdevice-pr-poll-loop-cb.h"
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+#include "qdevice-votequorum.h"
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+
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+static int
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+heuristics_pipe_log_recv_read_cb(int fd, void *user_data1, void *user_data2)
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+{
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+ struct qdevice_instance *instance = (struct qdevice_instance *)user_data1;
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+ int res;
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+
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+ res = qdevice_heuristics_log_read_from_pipe(&instance->heuristics_instance);
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+ if (res == -1) {
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+ instance->heuristics_closed = 1;
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+ return (-1);
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+ }
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+
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+ return (0);
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+}
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+
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+/*
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+ * Callback is shared for all heuristics pipes
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+ */
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+static int
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+heuristics_pipe_err_cb(int fd, short revents, void *user_data1, void *user_data2)
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+{
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+ struct qdevice_instance *instance = (struct qdevice_instance *)user_data1;
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+
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+ instance->heuristics_closed = 1;
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+
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+ /*
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+ * Closed pipe doesn't mean return of PR_POLL_READ. To display
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+ * better log message, we call read log as if POLLIN would
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+ * be set. Ignore error code because loop closes anyway.
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+ */
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+ (void)qdevice_heuristics_log_read_from_pipe(&instance->heuristics_instance);
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+ log(LOG_DEBUG, "POLL_ERR (%u) on heuristics pipe. "
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+ "Disconnecting.", revents);
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+
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+ return (-1);
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+}
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+
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+static int
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+heuristics_pipe_cmd_recv_read_cb(int fd, void *user_data1, void *user_data2)
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+{
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+ struct qdevice_instance *instance = (struct qdevice_instance *)user_data1;
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+ int res;
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+
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+ res = qdevice_heuristics_cmd_read_from_pipe(&instance->heuristics_instance);
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+ if (res == -1) {
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+ instance->heuristics_closed = 1;
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+ return (-1);
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+ }
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+
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+ return (0);
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+}
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+
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+static int
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+heuristics_pipe_cmd_send_set_events_cb(int fd, short *events, void *user_data1, void *user_data2)
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+{
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+ struct qdevice_instance *instance = (struct qdevice_instance *)user_data1;
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+ int res;
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+
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+ res = -1;
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+
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+ if (!send_buffer_list_empty(&instance->heuristics_instance.cmd_out_buffer_list)) {
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+ *events |= POLLOUT;
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+ res = 0;
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+ }
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+
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+ return (res);
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+}
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+
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+static int
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+heuristics_pipe_cmd_send_write_cb(int fd, void *user_data1, void *user_data2)
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+{
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+ struct qdevice_instance *instance = (struct qdevice_instance *)user_data1;
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+ int res;
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+
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+ res = qdevice_heuristics_cmd_write(&instance->heuristics_instance);
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+ if (res == -1) {
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+ instance->heuristics_closed = 1;
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+ return (-1);
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+ }
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+
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+ return (0);
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+}
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+
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+static int
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+votequorum_read_cb(int fd, void *user_data1, void *user_data2)
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+{
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+ struct qdevice_instance *instance = (struct qdevice_instance *)user_data1;
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+ int res;
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+
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+ res = qdevice_votequorum_dispatch(instance);
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+ if (res == -1) {
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+ instance->votequorum_closed = 1;
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+ return (-1);
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+ }
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+
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+ return (0);
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+}
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+
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+static int
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+votequorum_err_cb(int fd, short revents, void *user_data1, void *user_data2)
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+{
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+ struct qdevice_instance *instance = (struct qdevice_instance *)user_data1;
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+
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+ instance->votequorum_closed = 1;
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+
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+ log(LOG_DEBUG, "POLL_ERR (%u) on corosync socket. "
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+ "Disconnecting.", revents);
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+
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+ return (-1);
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+}
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+
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+int
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+qdevice_pr_poll_loop_cb_register(struct qdevice_instance *instance)
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+{
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+
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+ if (pr_poll_loop_add_fd(&instance->main_poll_loop, instance->heuristics_instance.pipe_log_recv,
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+ POLLIN, NULL, heuristics_pipe_log_recv_read_cb, NULL, heuristics_pipe_err_cb,
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+ instance, NULL) != 0) {
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+ log(LOG_ERR, "Can't add heuristics log pipe to main poll loop");
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+
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+ return (-1);
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+ }
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+
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+ if (pr_poll_loop_add_fd(&instance->main_poll_loop, instance->heuristics_instance.pipe_cmd_recv,
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+ POLLIN, NULL, heuristics_pipe_cmd_recv_read_cb, NULL, heuristics_pipe_err_cb,
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+ instance, NULL) != 0) {
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+ log(LOG_ERR, "Can't add heuristics cmd recv pipe to main poll loop");
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+
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+ return (-1);
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+ }
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+
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+ if (pr_poll_loop_add_fd(&instance->main_poll_loop, instance->heuristics_instance.pipe_cmd_send,
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+ 0, heuristics_pipe_cmd_send_set_events_cb, NULL,
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+ heuristics_pipe_cmd_send_write_cb, heuristics_pipe_err_cb,
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+ instance, NULL) != 0) {
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+ log(LOG_ERR, "Can't add heuristics cmd send pipe to main poll loop");
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+
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+ return (-1);
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+ }
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+
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+ if (pr_poll_loop_add_fd(&instance->main_poll_loop, instance->votequorum_poll_fd,
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+ POLLIN, NULL, votequorum_read_cb, NULL, votequorum_err_cb,
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+ instance, NULL) != 0) {
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+ log(LOG_ERR, "Can't add votequorum fd to main poll loop");
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+
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+ return (-1);
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+ }
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+
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+ return (0);
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+}
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Jan Friesse