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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> | |
4bd69c5f | 13 | #include <lttng/lttng-export.h> |
e8360425 | 14 | #include <stdint.h> |
e8360425 JD |
15 | |
16 | #ifdef __cplusplus | |
17 | extern "C" { | |
18 | #endif | |
19 | ||
e8360425 JD |
20 | /** |
21 | * Session consumed size conditions allow an action to be taken whenever a | |
22 | * session's produced data size crosses a set threshold. | |
23 | * | |
24 | * These conditions are periodically evaluated against the current session | |
25 | * statistics. The period at which these conditions are evaluated is | |
26 | * governed by the channels' monitor timer. | |
27 | * | |
28 | * Session consumed size conditions have the following properties: | |
29 | * - the exact name of the session to be monitored, | |
30 | * - a total consumed size threshold, expressed in bytes. | |
31 | * | |
32 | * Wildcards, regular expressions or other globbing mechanisms are not supported | |
33 | * in session consumed size condition properties. | |
34 | */ | |
35 | ||
36 | /* | |
37 | * Create a newly allocated session consumed size condition. | |
38 | * | |
39 | * A session consumed size condition evaluates to true whenever the sum of all | |
40 | * its channels' consumed data size is higher than a set threshold. The | |
41 | * consumed data sizes are free running counters. | |
42 | * | |
43 | * Returns a new condition on success, NULL on failure. This condition must be | |
44 | * destroyed using lttng_condition_destroy(). | |
45 | */ | |
4bd69c5f | 46 | LTTNG_EXPORT extern struct lttng_condition * |
e8360425 JD |
47 | lttng_condition_session_consumed_size_create(void); |
48 | ||
49 | /* | |
50 | * Get the threshold of a session consumed size condition. | |
51 | * | |
52 | * The session consumed size condition's threshold must have been defined as | |
53 | * an absolute value expressed in bytes in order for this call to succeed. | |
54 | * | |
55 | * Returns LTTNG_CONDITION_STATUS_OK on success and a threshold expressed in | |
56 | * bytes, LTTNG_CONDITION_STATUS_INVALID if an invalid parameter is passed, or | |
57 | * LTTNG_CONDITION_STATUS_UNSET if a threshold, expressed as an absolute size in | |
58 | * bytes, was not set prior to this call. | |
59 | */ | |
4bd69c5f | 60 | LTTNG_EXPORT extern enum lttng_condition_status |
e8360425 JD |
61 | lttng_condition_session_consumed_size_get_threshold( |
62 | const struct lttng_condition *condition, | |
63 | uint64_t *consumed_threshold_bytes); | |
64 | ||
65 | /* | |
66 | * Set the threshold of a session consumed size usage condition. | |
67 | * | |
68 | * Setting a threshold overrides any previously set threshold. | |
69 | * | |
70 | * Returns LTTNG_CONDITION_STATUS_OK on success, LTTNG_CONDITION_STATUS_INVALID | |
71 | * if invalid parameters are passed. | |
72 | */ | |
4bd69c5f | 73 | LTTNG_EXPORT extern enum lttng_condition_status |
e8360425 JD |
74 | lttng_condition_session_consumed_size_set_threshold( |
75 | struct lttng_condition *condition, | |
76 | uint64_t consumed_threshold_bytes); | |
77 | ||
78 | /* | |
79 | * Get the session name property of a session consumed size condition. | |
80 | * | |
81 | * The caller does not assume the ownership of the returned session name. The | |
82 | * session name shall only be used for the duration of the condition's | |
83 | * lifetime, or before a different session name is set. | |
84 | * | |
85 | * Returns LTTNG_CONDITION_STATUS_OK and a pointer to the condition's session | |
86 | * name on success, LTTNG_CONDITION_STATUS_INVALID if an invalid | |
87 | * parameter is passed, or LTTNG_CONDITION_STATUS_UNSET if a session name | |
88 | * was not set prior to this call. | |
89 | */ | |
4bd69c5f | 90 | LTTNG_EXPORT extern enum lttng_condition_status |
e8360425 JD |
91 | lttng_condition_session_consumed_size_get_session_name( |
92 | const struct lttng_condition *condition, | |
93 | const char **session_name); | |
94 | ||
95 | /* | |
96 | * Set the session name property of a session consumed size condition. | |
97 | * | |
98 | * The passed session name parameter will be copied to the condition. | |
99 | * | |
100 | * Returns LTTNG_CONDITION_STATUS_OK on success, LTTNG_CONDITION_STATUS_INVALID | |
101 | * if invalid parameters are passed. | |
102 | */ | |
4bd69c5f | 103 | LTTNG_EXPORT extern enum lttng_condition_status |
e8360425 JD |
104 | lttng_condition_session_consumed_size_set_session_name( |
105 | struct lttng_condition *condition, | |
106 | const char *session_name); | |
107 | ||
108 | /** | |
109 | * lttng_evaluation_session_consumed_size is specialised lttng_evaluations | |
110 | * which allow users to query a number of properties resulting from the | |
111 | * evaluation of a condition which evaluated to true. | |
112 | */ | |
113 | ||
114 | /* | |
115 | * Get the session consumed property of a session consumed size evaluation. | |
116 | * | |
cc02b9d4 JG |
117 | * Returns LTTNG_EVALUATION_STATUS_OK on success and a threshold expressed in |
118 | * bytes, or LTTNG_EVALUATION_STATUS_INVALID if an invalid parameter is passed. | |
e8360425 | 119 | */ |
4bd69c5f | 120 | LTTNG_EXPORT extern enum lttng_evaluation_status |
e8360425 JD |
121 | lttng_evaluation_session_consumed_size_get_consumed_size( |
122 | const struct lttng_evaluation *evaluation, | |
123 | uint64_t *session_consumed); | |
124 | ||
125 | #ifdef __cplusplus | |
126 | } | |
127 | #endif | |
128 | ||
129 | #endif /* LTTNG_CONDITION_SESSION_CONSUMED_SIZE_H */ |