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1 | /* |
2 | * Copyright (c) 2015-2017 Red Hat, Inc. | |
3 | * | |
4 | * All rights reserved. | |
5 | * | |
6 | * Author: Jan Friesse (jfriesse@redhat.com) | |
7 | * | |
8 | * This software licensed under BSD license, the text of which follows: | |
9 | * | |
10 | * Redistribution and use in source and binary forms, with or without | |
11 | * modification, are permitted provided that the following conditions are met: | |
12 | * | |
13 | * - Redistributions of source code must retain the above copyright notice, | |
14 | * this list of conditions and the following disclaimer. | |
15 | * - Redistributions in binary form must reproduce the above copyright notice, | |
16 | * this list of conditions and the following disclaimer in the documentation | |
17 | * and/or other materials provided with the distribution. | |
18 | * - Neither the name of the Red Hat, Inc. nor the names of its | |
19 | * contributors may be used to endorse or promote products derived from this | |
20 | * software without specific prior written permission. | |
21 | * | |
22 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |
23 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
24 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
25 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE | |
26 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
27 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
28 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
29 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |
30 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
31 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF | |
32 | * THE POSSIBILITY OF SUCH DAMAGE. | |
33 | */ | |
34 | ||
35 | #include "qnet-config.h" | |
36 | #include "qdevice-log.h" | |
37 | #include "qdevice-net-cast-vote-timer.h" | |
38 | #include "qdevice-votequorum.h" | |
39 | ||
40 | static int | |
41 | qdevice_net_cast_vote_timer_callback(void *data1, void *data2) | |
42 | { | |
43 | struct qdevice_net_instance *instance; | |
44 | int cast_vote; | |
45 | int case_processed; | |
46 | ||
47 | instance = (struct qdevice_net_instance *)data1; | |
48 | ||
49 | if (instance->cast_vote_timer_paused) { | |
50 | return (-1); | |
51 | } | |
52 | ||
53 | case_processed = 0; | |
54 | ||
55 | switch (instance->cast_vote_timer_vote) { | |
56 | case TLV_VOTE_ACK: | |
57 | case_processed = 1; | |
58 | cast_vote = 1; | |
59 | break; | |
60 | case TLV_VOTE_NACK: | |
61 | case_processed = 1; | |
62 | cast_vote = 0; | |
63 | break; | |
64 | case TLV_VOTE_ASK_LATER: | |
65 | case TLV_VOTE_WAIT_FOR_REPLY: | |
66 | case TLV_VOTE_NO_CHANGE: | |
67 | case TLV_VOTE_UNDEFINED: | |
68 | /* | |
69 | * Shouldn't happen | |
70 | */ | |
71 | break; | |
72 | /* | |
73 | * Default is not defined intentionally. Compiler shows warning when | |
74 | * new tlv_vote is added. | |
75 | */ | |
76 | } | |
77 | ||
78 | if (!case_processed) { | |
79 | qdevice_log(LOG_CRIT, "qdevice_net_timer_cast_vote: Unhandled cast_vote_timer_vote %u\n", | |
80 | instance->cast_vote_timer_vote); | |
81 | exit(1); | |
82 | } | |
83 | ||
84 | if (qdevice_votequorum_poll(instance->qdevice_instance_ptr, cast_vote) != 0) { | |
85 | instance->disconnect_reason = QDEVICE_NET_DISCONNECT_REASON_CANT_SCHEDULE_VOTING_TIMER; | |
86 | instance->schedule_disconnect = 1; | |
87 | instance->cast_vote_timer = NULL; | |
88 | return (0); | |
89 | } | |
90 | ||
91 | /* | |
92 | * Schedule this function callback again | |
93 | */ | |
94 | return (-1); | |
95 | } | |
96 | ||
97 | int | |
98 | qdevice_net_cast_vote_timer_update(struct qdevice_net_instance *instance, enum tlv_vote vote) | |
99 | { | |
100 | int timer_needs_running; | |
101 | int case_processed; | |
102 | ||
103 | case_processed = 0; | |
104 | ||
105 | switch (vote) { | |
106 | case TLV_VOTE_UNDEFINED: | |
107 | break; | |
108 | case TLV_VOTE_ACK: | |
109 | case TLV_VOTE_NACK: | |
110 | case_processed = 1; | |
111 | timer_needs_running = 1; | |
112 | break; | |
113 | case TLV_VOTE_WAIT_FOR_REPLY: | |
114 | case TLV_VOTE_ASK_LATER: | |
115 | case_processed = 1; | |
116 | timer_needs_running = 0; | |
117 | break; | |
118 | case TLV_VOTE_NO_CHANGE: | |
119 | case_processed = 1; | |
120 | return (0); | |
121 | ||
122 | break; | |
123 | /* | |
124 | * Default is not defined intentionally. Compiler shows warning when | |
125 | * new tlv_vote is added. | |
126 | */ | |
127 | } | |
128 | ||
129 | if (!case_processed) { | |
130 | qdevice_log(LOG_CRIT, "qdevice_net_cast_vote_timer_update_vote: Unhandled vote parameter %u\n", | |
131 | vote); | |
132 | exit(1); | |
133 | } | |
134 | ||
135 | instance->cast_vote_timer_vote = vote; | |
136 | ||
137 | if (timer_needs_running) { | |
138 | if (instance->cast_vote_timer == NULL) { | |
139 | instance->cast_vote_timer = timer_list_add(&instance->main_timer_list, | |
140 | instance->cast_vote_timer_interval, | |
141 | qdevice_net_cast_vote_timer_callback, (void *)instance, NULL); | |
142 | ||
143 | if (instance->cast_vote_timer == NULL) { | |
144 | qdevice_log(LOG_ERR, "Can't schedule sending of " | |
145 | "votequorum poll"); | |
146 | ||
147 | return (-1); | |
148 | } else { | |
149 | qdevice_log(LOG_DEBUG, "Cast vote timer is now scheduled every " | |
150 | "%"PRIu32"ms voting %s.", instance->cast_vote_timer_interval, | |
151 | tlv_vote_to_str(instance->cast_vote_timer_vote)); | |
152 | } | |
153 | } else { | |
154 | qdevice_log(LOG_DEBUG, "Cast vote timer remains scheduled every " | |
155 | "%"PRIu32"ms voting %s.", instance->cast_vote_timer_interval, | |
156 | tlv_vote_to_str(instance->cast_vote_timer_vote)); | |
157 | } | |
158 | ||
159 | if (qdevice_net_cast_vote_timer_callback((void *)instance, NULL) != -1) { | |
160 | return (-1); | |
161 | } | |
162 | } else { | |
163 | if (instance->cast_vote_timer != NULL) { | |
164 | timer_list_delete(&instance->main_timer_list, instance->cast_vote_timer); | |
165 | instance->cast_vote_timer = NULL; | |
166 | qdevice_log(LOG_DEBUG, "Cast vote timer is now stopped."); | |
167 | } else { | |
168 | qdevice_log(LOG_DEBUG, "Cast vote timer remains stopped."); | |
169 | } | |
170 | } | |
171 | ||
172 | return (0); | |
173 | } | |
174 | ||
175 | void | |
176 | qdevice_net_cast_vote_timer_set_paused(struct qdevice_net_instance *instance, int paused) | |
177 | { | |
178 | ||
179 | if (paused != instance->cast_vote_timer_paused) { | |
180 | instance->cast_vote_timer_paused = paused; | |
181 | ||
182 | if (instance->cast_vote_timer_paused) { | |
183 | qdevice_log(LOG_DEBUG, "Cast vote timer is now paused."); | |
184 | } else { | |
185 | qdevice_log(LOG_DEBUG, "Cast vote timer is no longer paused."); | |
186 | } | |
187 | } | |
188 | } |