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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 3d455e37abf8
children
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da8c5707af39 nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
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da8c5707af39 nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
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2 /*
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3 * Copyright (C) Igor Sysoev
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4 * Copyright (C) Nginx, Inc.
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5 */
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4c698194c56d nginx-0.0.1-2003-11-13-19:16:33 import
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8 #ifndef _NGX_OS_H_INCLUDED_
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9 #define _NGX_OS_H_INCLUDED_
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12 #include <ngx_config.h>
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13 #include <ngx_core.h>
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16 #define NGX_IO_SENDFILE 1
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19 typedef ssize_t (*ngx_recv_pt)(ngx_connection_t *c, u_char *buf, size_t size);
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20 typedef ssize_t (*ngx_recv_chain_pt)(ngx_connection_t *c, ngx_chain_t *in,
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21 off_t limit);
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22 typedef ssize_t (*ngx_send_pt)(ngx_connection_t *c, u_char *buf, size_t size);
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23 typedef ngx_chain_t *(*ngx_send_chain_pt)(ngx_connection_t *c, ngx_chain_t *in,
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24 off_t limit);
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26 typedef struct {
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27 ngx_recv_pt recv;
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28 ngx_recv_chain_pt recv_chain;
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29 ngx_recv_pt udp_recv;
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30 ngx_send_pt send;
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31 ngx_send_pt udp_send;
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32 ngx_send_chain_pt udp_send_chain;
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33 ngx_send_chain_pt send_chain;
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34 ngx_uint_t flags;
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35 } ngx_os_io_t;
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38 ngx_int_t ngx_os_init(ngx_log_t *log);
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39 void ngx_os_status(ngx_log_t *log);
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40 ngx_int_t ngx_os_specific_init(ngx_log_t *log);
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41 void ngx_os_specific_status(ngx_log_t *log);
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42 ngx_int_t ngx_daemon(ngx_log_t *log);
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43 ngx_int_t ngx_daemon_sync(ngx_log_t *log);
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44 ngx_int_t ngx_os_signal_process(ngx_cycle_t *cycle, char *sig, ngx_pid_t pid);
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47 ssize_t ngx_unix_recv(ngx_connection_t *c, u_char *buf, size_t size);
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48 ssize_t ngx_readv_chain(ngx_connection_t *c, ngx_chain_t *entry, off_t limit);
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49 ssize_t ngx_udp_unix_recv(ngx_connection_t *c, u_char *buf, size_t size);
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50 ssize_t ngx_unix_send(ngx_connection_t *c, u_char *buf, size_t size);
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51 ngx_chain_t *ngx_writev_chain(ngx_connection_t *c, ngx_chain_t *in,
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52 off_t limit);
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53 ssize_t ngx_udp_unix_send(ngx_connection_t *c, u_char *buf, size_t size);
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54 ngx_chain_t *ngx_udp_unix_sendmsg_chain(ngx_connection_t *c, ngx_chain_t *in,
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55 off_t limit);
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57
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58 #if (IOV_MAX > 64)
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59 #define NGX_IOVS_PREALLOCATE 64
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60 #else
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61 #define NGX_IOVS_PREALLOCATE IOV_MAX
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62 #endif
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63
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64
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65 typedef struct {
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66 struct iovec *iovs;
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67 ngx_uint_t count;
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68 size_t size;
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69 ngx_uint_t nalloc;
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70 } ngx_iovec_t;
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71
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72 ngx_chain_t *ngx_output_chain_to_iovec(ngx_iovec_t *vec, ngx_chain_t *in,
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73 size_t limit, ngx_log_t *log);
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74
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75
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76 ssize_t ngx_writev(ngx_connection_t *c, ngx_iovec_t *vec);
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78
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79 extern ngx_os_io_t ngx_os_io;
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80 extern ngx_int_t ngx_ncpu;
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81 extern ngx_int_t ngx_max_sockets;
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82 extern ngx_uint_t ngx_inherited_nonblocking;
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83 extern ngx_uint_t ngx_tcp_nodelay_and_tcp_nopush;
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85
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86 #if (NGX_FREEBSD)
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87 #include <ngx_freebsd.h>
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89
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90 #elif (NGX_LINUX)
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91 #include <ngx_linux.h>
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93
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94 #elif (NGX_SOLARIS)
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95 #include <ngx_solaris.h>
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98 #elif (NGX_DARWIN)
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99 #include <ngx_darwin.h>
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100 #endif
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102
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103 #endif /* _NGX_OS_H_INCLUDED_ */