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annotate src/core/ngx_bpf.h @ 9299:2706b60dc225

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Core: error logging rate limiting. With this change, error logging to files can be rate-limited with the "rate=" parameter. The parameter specifies allowed log messages rate to a particular file (per worker), in messages per second (m/s). By default, "rate=1000m/s" is used. Rate limiting is implemented using the "leaky bucket" method, similarly to the limit_req module. Maximum burst size is set to the number of log messages per second for each severity level, so "error" messages are logged even if the rate limit is hit by "info" messages (but not vice versa). When the limit is reached for a particular level, the "too many log messages, limiting" message is logged at this level. If debug logging is enabled, either for the particular log file or for the particular connection, rate limiting is not used.
author Maxim Dounin <mdounin@mdounin.ru>
date Tue, 25 Jun 2024 22:58:56 +0300
parents d3747ba486e7
children
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2 /*
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3 * Copyright (C) Nginx, Inc.
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4 */
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7 #ifndef _NGX_BPF_H_INCLUDED_
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8 #define _NGX_BPF_H_INCLUDED_
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11 #include <ngx_config.h>
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12 #include <ngx_core.h>
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14 #include <linux/bpf.h>
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17 typedef struct {
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18 char *name;
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19 int offset;
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20 } ngx_bpf_reloc_t;
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22 typedef struct {
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23 char *license;
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24 enum bpf_prog_type type;
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25 struct bpf_insn *ins;
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26 size_t nins;
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27 ngx_bpf_reloc_t *relocs;
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28 size_t nrelocs;
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29 } ngx_bpf_program_t;
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32 void ngx_bpf_program_link(ngx_bpf_program_t *program, const char *symbol,
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33 int fd);
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34 int ngx_bpf_load_program(ngx_log_t *log, ngx_bpf_program_t *program);
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36 int ngx_bpf_map_create(ngx_log_t *log, enum bpf_map_type type, int key_size,
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37 int value_size, int max_entries, uint32_t map_flags);
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38 int ngx_bpf_map_update(int fd, const void *key, const void *value,
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39 uint64_t flags);
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40 int ngx_bpf_map_delete(int fd, const void *key);
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41 int ngx_bpf_map_lookup(int fd, const void *key, void *value);
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43 #endif /* _NGX_BPF_H_INCLUDED_ */