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e8360425 | 1 | /* |
ab5be9fa | 2 | * Copyright (C) 2017 Jérémie Galarneau <jeremie.galarneau@efficios.com> |
e8360425 | 3 | * |
ab5be9fa | 4 | * SPDX-License-Identifier: LGPL-2.1-only |
e8360425 | 5 | * |
e8360425 JD |
6 | */ |
7 | ||
8 | #ifndef LTTNG_CONDITION_SESSION_CONSUMED_SIZE_H | |
9 | #define LTTNG_CONDITION_SESSION_CONSUMED_SIZE_H | |
10 | ||
11 | #include <lttng/condition/evaluation.h> | |
12 | #include <lttng/condition/condition.h> | |
13 | #include <stdint.h> | |
e8360425 JD |
14 | |
15 | #ifdef __cplusplus | |
16 | extern "C" { | |
17 | #endif | |
18 | ||
e8360425 JD |
19 | /** |
20 | * Session consumed size conditions allow an action to be taken whenever a | |
21 | * session's produced data size crosses a set threshold. | |
22 | * | |
23 | * These conditions are periodically evaluated against the current session | |
24 | * statistics. The period at which these conditions are evaluated is | |
25 | * governed by the channels' monitor timer. | |
26 | * | |
27 | * Session consumed size conditions have the following properties: | |
28 | * - the exact name of the session to be monitored, | |
29 | * - a total consumed size threshold, expressed in bytes. | |
30 | * | |
31 | * Wildcards, regular expressions or other globbing mechanisms are not supported | |
32 | * in session consumed size condition properties. | |
33 | */ | |
34 | ||
35 | /* | |
36 | * Create a newly allocated session consumed size condition. | |
37 | * | |
38 | * A session consumed size condition evaluates to true whenever the sum of all | |
39 | * its channels' consumed data size is higher than a set threshold. The | |
40 | * consumed data sizes are free running counters. | |
41 | * | |
42 | * Returns a new condition on success, NULL on failure. This condition must be | |
43 | * destroyed using lttng_condition_destroy(). | |
44 | */ | |
45 | extern struct lttng_condition * | |
46 | lttng_condition_session_consumed_size_create(void); | |
47 | ||
48 | /* | |
49 | * Get the threshold of a session consumed size condition. | |
50 | * | |
51 | * The session consumed size condition's threshold must have been defined as | |
52 | * an absolute value expressed in bytes in order for this call to succeed. | |
53 | * | |
54 | * Returns LTTNG_CONDITION_STATUS_OK on success and a threshold expressed in | |
55 | * bytes, LTTNG_CONDITION_STATUS_INVALID if an invalid parameter is passed, or | |
56 | * LTTNG_CONDITION_STATUS_UNSET if a threshold, expressed as an absolute size in | |
57 | * bytes, was not set prior to this call. | |
58 | */ | |
59 | extern enum lttng_condition_status | |
60 | lttng_condition_session_consumed_size_get_threshold( | |
61 | const struct lttng_condition *condition, | |
62 | uint64_t *consumed_threshold_bytes); | |
63 | ||
64 | /* | |
65 | * Set the threshold of a session consumed size usage condition. | |
66 | * | |
67 | * Setting a threshold overrides any previously set threshold. | |
68 | * | |
69 | * Returns LTTNG_CONDITION_STATUS_OK on success, LTTNG_CONDITION_STATUS_INVALID | |
70 | * if invalid parameters are passed. | |
71 | */ | |
72 | extern enum lttng_condition_status | |
73 | lttng_condition_session_consumed_size_set_threshold( | |
74 | struct lttng_condition *condition, | |
75 | uint64_t consumed_threshold_bytes); | |
76 | ||
77 | /* | |
78 | * Get the session name property of a session consumed size condition. | |
79 | * | |
80 | * The caller does not assume the ownership of the returned session name. The | |
81 | * session name shall only be used for the duration of the condition's | |
82 | * lifetime, or before a different session name is set. | |
83 | * | |
84 | * Returns LTTNG_CONDITION_STATUS_OK and a pointer to the condition's session | |
85 | * name on success, LTTNG_CONDITION_STATUS_INVALID if an invalid | |
86 | * parameter is passed, or LTTNG_CONDITION_STATUS_UNSET if a session name | |
87 | * was not set prior to this call. | |
88 | */ | |
89 | extern enum lttng_condition_status | |
90 | lttng_condition_session_consumed_size_get_session_name( | |
91 | const struct lttng_condition *condition, | |
92 | const char **session_name); | |
93 | ||
94 | /* | |
95 | * Set the session name property of a session consumed size condition. | |
96 | * | |
97 | * The passed session name parameter will be copied to the condition. | |
98 | * | |
99 | * Returns LTTNG_CONDITION_STATUS_OK on success, LTTNG_CONDITION_STATUS_INVALID | |
100 | * if invalid parameters are passed. | |
101 | */ | |
102 | extern enum lttng_condition_status | |
103 | lttng_condition_session_consumed_size_set_session_name( | |
104 | struct lttng_condition *condition, | |
105 | const char *session_name); | |
106 | ||
107 | /** | |
108 | * lttng_evaluation_session_consumed_size is specialised lttng_evaluations | |
109 | * which allow users to query a number of properties resulting from the | |
110 | * evaluation of a condition which evaluated to true. | |
111 | */ | |
112 | ||
113 | /* | |
114 | * Get the session consumed property of a session consumed size evaluation. | |
115 | * | |
cc02b9d4 JG |
116 | * Returns LTTNG_EVALUATION_STATUS_OK on success and a threshold expressed in |
117 | * bytes, or LTTNG_EVALUATION_STATUS_INVALID if an invalid parameter is passed. | |
e8360425 JD |
118 | */ |
119 | extern enum lttng_evaluation_status | |
120 | lttng_evaluation_session_consumed_size_get_consumed_size( | |
121 | const struct lttng_evaluation *evaluation, | |
122 | uint64_t *session_consumed); | |
123 | ||
124 | #ifdef __cplusplus | |
125 | } | |
126 | #endif | |
127 | ||
128 | #endif /* LTTNG_CONDITION_SESSION_CONSUMED_SIZE_H */ |