2 * Copyright (C) 2019 Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
4 * SPDX-License-Identifier: LGPL-2.1-only
8 #ifndef LTTNG_EVENT_RULE_KERNEL_TRACEPOINT_H
9 #define LTTNG_EVENT_RULE_KERNEL_TRACEPOINT_H
11 #include <lttng/event-rule/event-rule.h>
12 #include <lttng/event.h>
19 * Create a newly allocated kernel tracepoint event rule.
21 * The default pattern is '*'.
23 * Returns a new event rule on success, NULL on failure. This event rule must be
24 * destroyed using lttng_event_rule_destroy().
26 extern struct lttng_event_rule
*lttng_event_rule_kernel_tracepoint_create(void);
29 * Set the name pattern of a kernel tracepoint event rule.
31 * Pattern can contain wildcard '*'. See man lttng-enable-event.
33 * Return LTTNG_EVENT_RULE_STATUS_OK on success, LTTNG_EVENT_RULE_STATUS_INVALID
34 * if invalid parameters are passed.
36 extern enum lttng_event_rule_status
lttng_event_rule_kernel_tracepoint_set_name_pattern(
37 struct lttng_event_rule
*rule
, const char *pattern
);
40 * Get the name pattern of a kernel tracepoint event rule.
42 * The caller does not assume the ownership of the returned pattern. The
43 * pattern shall only only be used for the duration of the event rule's
44 * lifetime, or before a different pattern is set.
46 * Returns LTTNG_EVENT_RULE_STATUS_OK and a pointer to the event rule's pattern
47 * on success, LTTNG_EVENT_RULE_STATUS_INVALID if an invalid
48 * parameter is passed, or LTTNG_EVENT_RULE_STATUS_UNSET if a pattern
49 * was not set prior to this call.
51 extern enum lttng_event_rule_status
lttng_event_rule_kernel_tracepoint_get_name_pattern(
52 const struct lttng_event_rule
*rule
, const char **pattern
);
55 * Set the filter expression of a kernel tracepoint event rule.
57 * The expression is copied internally.
59 * Return LTTNG_EVENT_RULE_STATUS_OK on success, LTTNG_EVENT_RULE_STATUS_INVALID
60 * if invalid parameters are passed.
62 extern enum lttng_event_rule_status
lttng_event_rule_kernel_tracepoint_set_filter(
63 struct lttng_event_rule
*rule
, const char *expression
);
66 * Get the filter expression of a kernel tracepoint event rule.
68 * The caller does not assume the ownership of the returned filter expression.
69 * The filter expression shall only only be used for the duration of the event
70 * rule's lifetime, or before a different filter expression is set.
72 * Returns LTTNG_EVENT_RULE_STATUS_OK and a pointer to the event rule's filter
73 * expression on success, LTTNG_EVENT_RULE_STATUS_INVALID if an invalid
74 * parameter is passed, or LTTNG_EVENT_RULE_STATUS_UNSET if a filter expression
75 * was not set prior to this call.
77 extern enum lttng_event_rule_status
lttng_event_rule_kernel_tracepoint_get_filter(
78 const struct lttng_event_rule
*rule
, const char **expression
);
84 #endif /* LTTNG_EVENT_RULE_KERNEL_TRACEPOINT_H */
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