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2463b787 JR |
1 | /* |
2 | * Copyright (C) 2020 Jérémie Galarneau <jeremie.galarneau@efficios.com> | |
3 | * Copyright (C) 2020 Jonathan Rajotte-Julien | |
4 | * <jonathan.rajotte-julein@efficios.com> | |
5 | * | |
6 | * SPDX-License-Identifier: MIT | |
7 | * | |
8 | */ | |
9 | #include "performance.h" | |
10 | ||
11 | #include <lttng/tracepoint.h> | |
12 | ||
13 | #include <lttng/condition/event-rule.h> | |
14 | #include <lttng/lttng.h> | |
15 | ||
16 | #include <assert.h> | |
17 | #include <stdbool.h> | |
18 | #include <stddef.h> | |
19 | #include <stdio.h> | |
20 | #include <stdlib.h> | |
21 | #include <string.h> | |
22 | #include <sys/time.h> | |
23 | #include <time.h> | |
24 | #include <unistd.h> | |
25 | ||
26 | bool action_group_contains_notify(const struct lttng_action *action_group) | |
27 | { | |
28 | unsigned int i, count; | |
29 | enum lttng_action_status status = | |
30 | lttng_action_group_get_count(action_group, &count); | |
31 | ||
32 | if (status != LTTNG_ACTION_STATUS_OK) { | |
33 | printf("Failed to get action count from action group\n"); | |
34 | exit(1); | |
35 | } | |
36 | ||
37 | for (i = 0; i < count; i++) { | |
38 | const struct lttng_action *action = | |
39 | lttng_action_group_get_at_index( | |
40 | action_group, i); | |
41 | const enum lttng_action_type action_type = | |
42 | lttng_action_get_type(action); | |
43 | ||
44 | if (action_type == LTTNG_ACTION_TYPE_NOTIFY) { | |
45 | return true; | |
46 | } | |
47 | } | |
48 | return false; | |
49 | } | |
50 | ||
51 | int main(int argc, char **argv) | |
52 | { | |
53 | int ret; | |
54 | int id, nb_reception; | |
55 | struct lttng_triggers *triggers = NULL; | |
56 | unsigned int count, i, subcription_count = 0; | |
57 | enum lttng_trigger_status trigger_status; | |
58 | struct lttng_notification_channel *notification_channel = NULL; | |
59 | struct lttng_notification *notification; | |
60 | enum lttng_notification_channel_status channel_status; | |
61 | const struct lttng_evaluation *evaluation; | |
62 | enum lttng_condition_type type; | |
63 | ||
64 | if (argc != 4) { | |
65 | fprintf(stderr, "Missing unique_id\n"); | |
66 | fprintf(stderr, "Missing nb_event\n"); | |
67 | fprintf(stderr, "Missing trigger name\n"); | |
68 | fprintf(stderr, "Usage: notification-client TRIGGER_NAME\n"); | |
69 | ret = 1; | |
70 | goto end; | |
71 | } | |
72 | ||
73 | id = atoi(argv[1]); | |
74 | nb_reception = atoi(argv[2]); | |
75 | ||
76 | notification_channel = lttng_notification_channel_create( | |
77 | lttng_session_daemon_notification_endpoint); | |
78 | if (!notification_channel) { | |
79 | fprintf(stderr, "Failed to create notification channel\n"); | |
80 | ret = -1; | |
81 | goto end; | |
82 | } | |
83 | ||
84 | ret = lttng_list_triggers(&triggers); | |
85 | if (ret != LTTNG_OK) { | |
86 | fprintf(stderr, "Failed to list triggers\n"); | |
87 | goto end; | |
88 | } | |
89 | ||
90 | trigger_status = lttng_triggers_get_count(triggers, &count); | |
91 | if (trigger_status != LTTNG_TRIGGER_STATUS_OK) { | |
92 | fprintf(stderr, "Failed to get trigger count\n"); | |
93 | ret = -1; | |
94 | goto end; | |
95 | } | |
96 | ||
97 | for (i = 0; i < count; i++) { | |
98 | const struct lttng_trigger *trigger = | |
99 | lttng_triggers_get_at_index(triggers, i); | |
100 | const struct lttng_condition *condition = | |
101 | lttng_trigger_get_const_condition(trigger); | |
102 | const struct lttng_action *action = | |
103 | lttng_trigger_get_const_action(trigger); | |
104 | const enum lttng_action_type action_type = | |
105 | lttng_action_get_type(action); | |
106 | enum lttng_notification_channel_status channel_status; | |
107 | const char *trigger_name = NULL; | |
108 | ||
109 | lttng_trigger_get_name(trigger, &trigger_name); | |
110 | if (strcmp(trigger_name, argv[3])) { | |
111 | continue; | |
112 | } | |
113 | ||
114 | if (!((action_type == LTTNG_ACTION_TYPE_GROUP && | |
115 | action_group_contains_notify(action)) || | |
116 | action_type == LTTNG_ACTION_TYPE_NOTIFY)) { | |
117 | printf("The action of trigger \"%s\" is not \"notify\", skipping.\n", | |
118 | trigger_name); | |
119 | continue; | |
120 | } | |
121 | ||
122 | channel_status = lttng_notification_channel_subscribe( | |
123 | notification_channel, condition); | |
124 | if (channel_status) { | |
125 | fprintf(stderr, "Failed to subscribe to notifications of trigger \"%s\"\n", | |
126 | trigger_name); | |
127 | ret = -1; | |
128 | goto end; | |
129 | } | |
130 | ||
131 | printf("Subscribed to notifications of trigger \"%s\"\n", | |
132 | trigger_name); | |
133 | subcription_count++; | |
134 | } | |
135 | ||
136 | if (subcription_count == 0) { | |
137 | printf("No matching trigger with a notify action found.\n"); | |
138 | ret = 0; | |
139 | goto end; | |
140 | } | |
141 | ||
142 | for (int i = 0; i < nb_reception; i++) { | |
143 | channel_status = | |
144 | lttng_notification_channel_get_next_notification( | |
145 | notification_channel, | |
146 | ¬ification); | |
147 | switch (channel_status) { | |
148 | case LTTNG_NOTIFICATION_CHANNEL_STATUS_NOTIFICATIONS_DROPPED: | |
149 | printf("Dropped notification\n"); | |
150 | sleep(1); | |
151 | continue; | |
152 | break; | |
153 | case LTTNG_NOTIFICATION_CHANNEL_STATUS_INTERRUPTED: | |
154 | ret = 0; | |
155 | goto end; | |
156 | case LTTNG_NOTIFICATION_CHANNEL_STATUS_OK: | |
157 | break; | |
158 | case LTTNG_NOTIFICATION_CHANNEL_STATUS_CLOSED: | |
159 | printf("Notification channel was closed by peer.\n"); | |
160 | break; | |
161 | default: | |
162 | fprintf(stderr, "A communication error occurred on the notification channel.\n"); | |
163 | ret = -1; | |
164 | goto end; | |
165 | } | |
166 | ||
167 | evaluation = lttng_notification_get_evaluation(notification); | |
168 | type = lttng_evaluation_get_type(evaluation); | |
169 | ||
170 | if (type != LTTNG_CONDITION_TYPE_EVENT_RULE_HIT) { | |
171 | assert(0); | |
172 | } | |
173 | ||
174 | tracepoint(performance, receive, id, i); | |
175 | lttng_notification_destroy(notification); | |
176 | if (ret) { | |
177 | goto end; | |
178 | } | |
179 | } | |
180 | ||
181 | end: | |
182 | lttng_triggers_destroy(triggers); | |
183 | lttng_notification_channel_destroy(notification_channel); | |
184 | return !!ret; | |
185 | } |