projects / lttng-tools.git / blame
| Commit | Line | Data |
|---|---|---|
| b99a0cb3 JG |
1 | /* |
| 2 | * error-query.h | |
| 3 | * | |
| 4 | * Copyright (C) 2021 Jérémie Galarneau <jeremie.galarneau@efficios.com> | |
| 5 | * | |
| 6 | * SPDX-License-Identifier: GPL-2.1-only | |
| 7 | * | |
| 8 | */ | |
| 9 | ||
| 10 | #ifndef LTTNG_ERROR_QUERY_H | |
| 11 | #define LTTNG_ERROR_QUERY_H | |
| 12 | ||
| 13 | #include <lttng/lttng.h> | |
| 14 | #include <lttng/trigger/trigger.h> | |
| 15 | #include <stdint.h> | |
| 16 | ||
| 17 | #ifdef __cplusplus | |
| 18 | extern "C" { | |
| 19 | #endif | |
| 20 | ||
| 21 | /* An error query. */ | |
| 22 | struct lttng_error_query; | |
| 23 | ||
| 24 | /* | |
| 25 | * A collection of "lttng_error_query_result" returned after executing an error | |
| 26 | * query against an endpoint. | |
| 27 | */ | |
| 28 | struct lttng_error_query_results; | |
| 29 | ||
| 30 | /* A 'result' is an opaque error type. */ | |
| 31 | struct lttng_error_query_result; | |
| 32 | ||
| 33 | enum lttng_error_query_status { | |
| 34 | LTTNG_ERROR_QUERY_STATUS_OK = 0, | |
| 35 | /* An error occurred while querying for errors. */ | |
| 36 | LTTNG_ERROR_QUERY_STATUS_ERROR = -1, | |
| 37 | /* The target of the query does not make sense for this endpoint. */ | |
| 38 | LTTNG_ERROR_QUERY_STATUS_INVALID_QUERY_TARGET = -2, | |
| 39 | LTTNG_ERROR_QUERY_STATUS_INVALID_PARAMETER = -3, | |
| 40 | }; | |
| 41 | ||
| 42 | enum lttng_error_query_result_type { | |
| 43 | /* A count of errors provided as an unsigned integral value. */ | |
| 44 | LTTNG_ERROR_QUERY_RESULT_TYPE_COUNTER = 0, | |
| 45 | LTTNG_ERROR_QUERY_RESULT_TYPE_UNKNOWN = -1, | |
| 46 | }; | |
| 47 | ||
| 48 | enum lttng_error_query_result_status { | |
| 49 | LTTNG_ERROR_QUERY_RESULT_STATUS_OK = 0, | |
| 50 | LTTNG_ERROR_QUERY_RESULT_STATUS_ERROR = -1, | |
| 51 | LTTNG_ERROR_QUERY_RESULT_STATUS_INVALID_PARAMETER = -2, | |
| 52 | }; | |
| 53 | ||
| 54 | enum lttng_error_query_results_status { | |
| 55 | LTTNG_ERROR_QUERY_RESULTS_STATUS_OK = 0, | |
| 56 | LTTNG_ERROR_QUERY_RESULTS_STATUS_ERROR = -1, | |
| 57 | LTTNG_ERROR_QUERY_RESULTS_STATUS_INVALID_PARAMETER = -2, | |
| 58 | }; | |
| 59 | ||
| 60 | /* Create an error query targetting a trigger object. */ | |
| 61 | extern struct lttng_error_query *lttng_error_query_trigger_create( | |
| 62 | const struct lttng_trigger *trigger); | |
| 63 | ||
| 64 | /* Create an error query targetting an action object. */ | |
| 65 | extern struct lttng_error_query *lttng_error_query_action_create( | |
| 66 | const struct lttng_trigger *trigger, | |
| 67 | const struct lttng_action *action); | |
| 68 | ||
| 69 | /* Destroy an error query. */ | |
| 70 | extern void lttng_error_query_destroy(struct lttng_error_query *query); | |
| 71 | ||
| 72 | /* | |
| 73 | * Run an error query against an endpoint. | |
| 74 | * | |
| 75 | * Currently, only the `lttng_session_daemon_command_endpoint` is supported, | |
| 76 | * see `lttng/endpoint.h`. | |
| 77 | */ | |
| 78 | extern enum lttng_error_code lttng_error_query_execute( | |
| 79 | const struct lttng_error_query *query, | |
| 80 | const struct lttng_endpoint *endpoint, | |
| 81 | struct lttng_error_query_results **results); | |
| 82 | ||
| 83 | /* Get the number of results in a result set. */ | |
| 84 | extern enum lttng_error_query_results_status | |
| 85 | lttng_error_query_results_get_count( | |
| 86 | const struct lttng_error_query_results *results, | |
| 87 | unsigned int *count); | |
| 88 | ||
| 89 | /* Get a result from a result set by index. */ | |
| 90 | extern enum lttng_error_query_results_status | |
| 91 | lttng_error_query_results_get_result( | |
| 92 | const struct lttng_error_query_results *results, | |
| 93 | const struct lttng_error_query_result **result, | |
| 94 | unsigned int index); | |
| 95 | ||
| 96 | /* Destroy an error query result set. */ | |
| 97 | extern void lttng_error_query_results_destroy( | |
| 98 | struct lttng_error_query_results *results); | |
| 99 | ||
| 100 | /* Get the type of an error query result. */ | |
| 101 | extern enum lttng_error_query_result_type lttng_error_query_result_get_type( | |
| 102 | const struct lttng_error_query_result *result); | |
| 103 | ||
| 104 | /* Get the name of result. */ | |
| 105 | extern enum lttng_error_query_result_status lttng_error_query_result_get_name( | |
| 106 | const struct lttng_error_query_result *result, | |
| 107 | const char **name); | |
| 108 | ||
| 109 | /* Get the description of a result. */ | |
| 110 | extern enum lttng_error_query_result_status | |
| 111 | lttng_error_query_result_get_description( | |
| 112 | const struct lttng_error_query_result *result, | |
| 113 | const char **description); | |
| 114 | ||
| 115 | /* Get the value of an error counter. */ | |
| 116 | extern enum lttng_error_query_result_status | |
| 117 | lttng_error_query_result_counter_get_value( | |
| 118 | const struct lttng_error_query_result *result, uint64_t *value); | |
| 119 | ||
| 120 | #ifdef __cplusplus | |
| 121 | } | |
| 122 | #endif | |
| 123 | ||
| 124 | #endif /* LTTNG_ERROR_QUERY_H */ |