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1831ae68 FD |
1 | /* |
2 | * Copyright (C) 2020 Jérémie Galarneau <jeremie.galarneau@efficios.com> | |
3 | * | |
4 | * SPDX-License-Identifier: MIT | |
5 | * | |
6 | */ | |
7 | ||
8 | #include <lttng/condition/event-rule.h> | |
9 | #include <lttng/lttng.h> | |
10 | ||
11 | #include <stdbool.h> | |
12 | #include <stddef.h> | |
13 | #include <stdio.h> | |
14 | #include <stdlib.h> | |
15 | #include <string.h> | |
16 | #include <sys/time.h> | |
17 | #include <time.h> | |
18 | ||
19 | bool action_group_contains_notify(const struct lttng_action *action_group) | |
20 | { | |
21 | unsigned int i, count; | |
22 | enum lttng_action_status status = | |
23 | lttng_action_group_get_count(action_group, &count); | |
24 | ||
25 | if (status != LTTNG_ACTION_STATUS_OK) { | |
26 | printf("Failed to get action count from action group\n"); | |
27 | exit(1); | |
28 | } | |
29 | ||
30 | for (i = 0; i < count; i++) { | |
31 | const struct lttng_action *action = | |
32 | lttng_action_group_get_at_index_const( | |
33 | action_group, i); | |
34 | const enum lttng_action_type action_type = | |
35 | lttng_action_get_type(action); | |
36 | ||
37 | if (action_type == LTTNG_ACTION_TYPE_NOTIFY) { | |
38 | return true; | |
39 | } | |
40 | } | |
41 | return false; | |
42 | } | |
43 | ||
44 | int print_notification(struct lttng_notification *notification) | |
45 | { | |
46 | int ret = 0; | |
47 | const struct lttng_condition *condition = | |
48 | lttng_notification_get_condition(notification); | |
49 | const struct lttng_evaluation *evaluation = | |
50 | lttng_notification_get_evaluation(notification); | |
51 | const enum lttng_condition_type type = | |
52 | lttng_evaluation_get_type(evaluation); | |
53 | ||
54 | switch (type) { | |
55 | case LTTNG_CONDITION_TYPE_SESSION_CONSUMED_SIZE: | |
56 | printf("Received consumed size notification\n"); | |
57 | break; | |
58 | case LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW: | |
59 | case LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH: | |
60 | printf("Received buffer usage notification\n"); | |
61 | break; | |
62 | case LTTNG_CONDITION_TYPE_SESSION_ROTATION_ONGOING: | |
63 | printf("Received session rotation ongoing notification\n"); | |
64 | break; | |
65 | case LTTNG_CONDITION_TYPE_SESSION_ROTATION_COMPLETED: | |
66 | printf("Received session rotation completed notification\n"); | |
67 | break; | |
68 | case LTTNG_CONDITION_TYPE_EVENT_RULE_HIT: | |
69 | { | |
70 | const char *trigger_name; | |
71 | enum lttng_evaluation_status evaluation_status; | |
72 | char time_str[64]; | |
73 | struct timeval tv; | |
74 | time_t the_time; | |
75 | ||
76 | gettimeofday(&tv, NULL); | |
77 | the_time = tv.tv_sec; | |
78 | ||
79 | strftime(time_str, sizeof(time_str), "[%m-%d-%Y] %T", | |
80 | localtime(&the_time)); | |
81 | printf("%s.%ld - ", time_str, tv.tv_usec); | |
82 | ||
83 | evaluation_status = | |
84 | lttng_evaluation_event_rule_get_trigger_name( | |
85 | evaluation, &trigger_name); | |
86 | if (evaluation_status != LTTNG_EVALUATION_STATUS_OK) { | |
87 | fprintf(stderr, "Failed to get trigger name of event rule notification\n"); | |
88 | ret = -1; | |
89 | break; | |
90 | } | |
91 | ||
92 | printf("Received notification of event rule trigger \"%s\"\n", | |
93 | trigger_name); | |
94 | break; | |
95 | } | |
96 | default: | |
97 | fprintf(stderr, "Unknown notification type (%d)\n", type); | |
98 | } | |
99 | ||
100 | return ret; | |
101 | } | |
102 | ||
103 | int main(int argc, char **argv) | |
104 | { | |
105 | int ret; | |
106 | struct lttng_triggers *triggers = NULL; | |
107 | unsigned int count, i, subcription_count = 0; | |
108 | enum lttng_trigger_status trigger_status; | |
109 | struct lttng_notification_channel *notification_channel = NULL; | |
110 | ||
111 | if (argc != 2) { | |
112 | fprintf(stderr, "Missing trigger name\n"); | |
113 | fprintf(stderr, "Usage: notification-client TRIGGER_NAME\n"); | |
114 | goto end; | |
115 | } | |
116 | ||
117 | notification_channel = lttng_notification_channel_create( | |
118 | lttng_session_daemon_notification_endpoint); | |
119 | if (!notification_channel) { | |
120 | fprintf(stderr, "Failed to create notification channel\n"); | |
121 | ret = -1; | |
122 | goto end; | |
123 | } | |
124 | ||
125 | ret = lttng_list_triggers(&triggers); | |
126 | if (ret) { | |
127 | fprintf(stderr, "Failed to list triggers\n"); | |
128 | goto end; | |
129 | } | |
130 | ||
131 | trigger_status = lttng_triggers_get_count(triggers, &count); | |
132 | if (trigger_status != LTTNG_TRIGGER_STATUS_OK) { | |
133 | fprintf(stderr, "Failed to get trigger count\n"); | |
134 | ret = -1; | |
135 | goto end; | |
136 | } | |
137 | ||
138 | for (i = 0; i < count; i++) { | |
139 | const struct lttng_trigger *trigger = | |
140 | lttng_triggers_get_at_index(triggers, i); | |
141 | const struct lttng_condition *condition = | |
142 | lttng_trigger_get_const_condition(trigger); | |
143 | const struct lttng_action *action = | |
144 | lttng_trigger_get_const_action(trigger); | |
145 | const enum lttng_action_type action_type = | |
146 | lttng_action_get_type(action); | |
147 | enum lttng_notification_channel_status channel_status; | |
148 | const char *trigger_name = NULL; | |
149 | enum lttng_trigger_status trigger_status; | |
150 | ||
151 | lttng_trigger_get_name(trigger, &trigger_name); | |
152 | if (strcmp(trigger_name, argv[1])) { | |
153 | continue; | |
154 | } | |
155 | ||
156 | if (!((action_type == LTTNG_ACTION_TYPE_GROUP && | |
157 | action_group_contains_notify(action)) || | |
158 | action_type == LTTNG_ACTION_TYPE_NOTIFY)) { | |
159 | printf("The action of trigger \"%s\" is not \"notify\", skipping.\n", | |
160 | trigger_name); | |
161 | continue; | |
162 | } | |
163 | ||
164 | channel_status = lttng_notification_channel_subscribe( | |
165 | notification_channel, condition); | |
166 | if (channel_status) { | |
167 | fprintf(stderr, "Failed to subscribe to notifications of trigger \"%s\"\n", | |
168 | trigger_name); | |
169 | ret = -1; | |
170 | goto end; | |
171 | } | |
172 | ||
173 | printf("Subscribed to notifications of trigger \"%s\"\n", | |
174 | trigger_name); | |
175 | subcription_count++; | |
176 | } | |
177 | ||
178 | if (subcription_count == 0) { | |
179 | printf("No matching trigger with a notify action found.\n"); | |
180 | ret = 0; | |
181 | goto end; | |
182 | } | |
183 | ||
184 | for (;;) { | |
185 | struct lttng_notification *notification; | |
186 | enum lttng_notification_channel_status channel_status; | |
187 | ||
188 | channel_status = | |
189 | lttng_notification_channel_get_next_notification( | |
190 | notification_channel, | |
191 | ¬ification); | |
192 | switch (channel_status) { | |
193 | case LTTNG_NOTIFICATION_CHANNEL_STATUS_NOTIFICATIONS_DROPPED: | |
194 | printf("Dropped notification\n"); | |
195 | break; | |
196 | case LTTNG_NOTIFICATION_CHANNEL_STATUS_INTERRUPTED: | |
197 | ret = 0; | |
198 | goto end; | |
199 | case LTTNG_NOTIFICATION_CHANNEL_STATUS_OK: | |
200 | break; | |
201 | case LTTNG_NOTIFICATION_CHANNEL_STATUS_CLOSED: | |
202 | printf("Notification channel was closed by peer.\n"); | |
203 | break; | |
204 | default: | |
205 | fprintf(stderr, "A communication error occurred on the notification channel.\n"); | |
206 | ret = -1; | |
207 | goto end; | |
208 | } | |
209 | ||
210 | ret = print_notification(notification); | |
211 | lttng_notification_destroy(notification); | |
212 | if (ret) { | |
213 | goto end; | |
214 | } | |
215 | } | |
216 | end: | |
217 | lttng_triggers_destroy(triggers); | |
218 | lttng_notification_channel_destroy(notification_channel); | |
219 | return !!ret; | |
220 | } |