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611f7844c9
While we do not like rexeg-matches for performance reasons, they are well known and appreciated by users. With the new table type, we add a lookup capability for partial matches, but at the price of much higher ressource use. It still is useful, e.g. to classify events as "noise" events in a simple manner.
131 lines
3.4 KiB
C
131 lines
3.4 KiB
C
/* header for lookup.c
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*
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* Copyright 2013-2023 Adiscon GmbH.
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*
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* This file is part of the rsyslog runtime library.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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* -or-
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* see COPYING.ASL20 in the source distribution
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef INCLUDED_LOOKUP_H
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#define INCLUDED_LOOKUP_H
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#include <libestr.h>
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#include <regex.h>
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#define STRING_LOOKUP_TABLE 1
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#define ARRAY_LOOKUP_TABLE 2
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#define SPARSE_ARRAY_LOOKUP_TABLE 3
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#define STUBBED_LOOKUP_TABLE 4
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#define REGEX_LOOKUP_TABLE 5
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#define LOOKUP_KEY_TYPE_STRING 1
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#define LOOKUP_KEY_TYPE_UINT 2
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#define LOOKUP_KEY_TYPE_NONE 3
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struct lookup_tables_s {
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lookup_ref_t *root; /* the root of the template list */
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lookup_ref_t *last; /* points to the last element of the template list */
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};
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struct lookup_array_tab_s {
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uint32_t first_key;
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uchar **interned_val_refs;
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};
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struct lookup_sparseArray_tab_entry_s {
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uint32_t key;
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uchar *interned_val_ref;
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};
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struct lookup_sparseArray_tab_s {
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lookup_sparseArray_tab_entry_t *entries;
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};
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struct lookup_string_tab_entry_s {
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uchar *key;
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uchar *interned_val_ref;
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};
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struct lookup_string_tab_s {
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lookup_string_tab_entry_t *entries;
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};
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struct lookup_regex_tab_entry_s {
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regex_t regex;
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uchar *regex_str;
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uchar *interned_val_ref;
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uint8_t is_compiled;
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};
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struct lookup_regex_tab_s {
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lookup_regex_tab_entry_t *entries;
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};
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struct lookup_ref_s {
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pthread_rwlock_t rwlock; /* protect us in case of dynamic reloads */
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uchar *name;
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uchar *filename;
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lookup_t *self;
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lookup_ref_t *next;
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/* reload specific attributes */
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pthread_mutex_t reloader_mut; /* signaling + access to reload-flow variables*/
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/* rwlock(above) may be acquired inside critical-section reloader_mut guards */
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pthread_cond_t run_reloader;
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pthread_t reloader;
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pthread_attr_t reloader_thd_attr;
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uchar *stub_value_for_reload_failure;
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uint8_t do_reload;
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uint8_t do_stop;
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uint8_t reload_on_hup;
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};
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typedef es_str_t* (lookup_fn_t)(lookup_t*, lookup_key_t);
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/* a single lookup table */
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struct lookup_s {
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uint32_t nmemb;
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uint8_t type;
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uint8_t key_type;
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union {
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lookup_string_tab_t *str;
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lookup_array_tab_t *arr;
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lookup_sparseArray_tab_t *sprsArr;
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lookup_regex_tab_t *regex;
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} table;
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uint32_t interned_val_count;
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uchar **interned_vals;
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uchar *nomatch;
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lookup_fn_t *lookup;
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};
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union lookup_key_u {
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uchar* k_str;
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uint32_t k_uint;
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};
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/* prototypes */
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void lookupInitCnf(lookup_tables_t *lu_tabs);
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rsRetVal lookupTableDefProcessCnf(struct cnfobj *o);
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lookup_ref_t *lookupFindTable(uchar *name);
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es_str_t * lookupKey(lookup_ref_t *pThis, lookup_key_t key);
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void lookupDestroyCnf(void);
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void lookupClassExit(void);
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void lookupDoHUP(void);
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rsRetVal lookupReload(lookup_ref_t *pThis, const uchar *stub_value_if_reload_fails);
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uint lookupPendingReloadCount(void);
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rsRetVal lookupClassInit(void);
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void lookupActivateConf(void);
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#endif /* #ifndef INCLUDED_LOOKUP_H */
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