Mercurial > hg > nginx-quic
view src/core/ngx_log.c @ 5885:5a042519bfe7
Upstream: limited next_upstream time and tries when resolving DNS.
When got multiple upstream IP addresses using DNS resolving, the number of
upstreams tries and the maxinum time spent for these tries were not affected.
This patch fixed it.
author | Gu Feng <flygoast@126.com> |
---|---|
date | Mon, 27 Oct 2014 19:52:03 +0800 |
parents | c3b08217f2a2 |
children | 727177743c3c |
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/* * Copyright (C) Igor Sysoev * Copyright (C) Nginx, Inc. */ #include <ngx_config.h> #include <ngx_core.h> static char *ngx_error_log(ngx_conf_t *cf, ngx_command_t *cmd, void *conf); static char *ngx_log_set_levels(ngx_conf_t *cf, ngx_log_t *log); static void ngx_log_insert(ngx_log_t *log, ngx_log_t *new_log); static ngx_command_t ngx_errlog_commands[] = { {ngx_string("error_log"), NGX_MAIN_CONF|NGX_CONF_1MORE, ngx_error_log, 0, 0, NULL}, ngx_null_command }; static ngx_core_module_t ngx_errlog_module_ctx = { ngx_string("errlog"), NULL, NULL }; ngx_module_t ngx_errlog_module = { NGX_MODULE_V1, &ngx_errlog_module_ctx, /* module context */ ngx_errlog_commands, /* module directives */ NGX_CORE_MODULE, /* module type */ NULL, /* init master */ NULL, /* init module */ NULL, /* init process */ NULL, /* init thread */ NULL, /* exit thread */ NULL, /* exit process */ NULL, /* exit master */ NGX_MODULE_V1_PADDING }; static ngx_log_t ngx_log; static ngx_open_file_t ngx_log_file; ngx_uint_t ngx_use_stderr = 1; static ngx_str_t err_levels[] = { ngx_null_string, ngx_string("emerg"), ngx_string("alert"), ngx_string("crit"), ngx_string("error"), ngx_string("warn"), ngx_string("notice"), ngx_string("info"), ngx_string("debug") }; static const char *debug_levels[] = { "debug_core", "debug_alloc", "debug_mutex", "debug_event", "debug_http", "debug_mail", "debug_mysql" }; #if (NGX_HAVE_VARIADIC_MACROS) void ngx_log_error_core(ngx_uint_t level, ngx_log_t *log, ngx_err_t err, const char *fmt, ...) #else void ngx_log_error_core(ngx_uint_t level, ngx_log_t *log, ngx_err_t err, const char *fmt, va_list args) #endif { #if (NGX_HAVE_VARIADIC_MACROS) va_list args; #endif u_char *p, *last, *msg; u_char errstr[NGX_MAX_ERROR_STR]; ngx_uint_t wrote_stderr, debug_connection; last = errstr + NGX_MAX_ERROR_STR; ngx_memcpy(errstr, ngx_cached_err_log_time.data, ngx_cached_err_log_time.len); p = errstr + ngx_cached_err_log_time.len; p = ngx_slprintf(p, last, " [%V] ", &err_levels[level]); /* pid#tid */ p = ngx_slprintf(p, last, "%P#" NGX_TID_T_FMT ": ", ngx_log_pid, ngx_log_tid); if (log->connection) { p = ngx_slprintf(p, last, "*%uA ", log->connection); } msg = p; #if (NGX_HAVE_VARIADIC_MACROS) va_start(args, fmt); p = ngx_vslprintf(p, last, fmt, args); va_end(args); #else p = ngx_vslprintf(p, last, fmt, args); #endif if (err) { p = ngx_log_errno(p, last, err); } if (level != NGX_LOG_DEBUG && log->handler) { p = log->handler(log, p, last - p); } if (p > last - NGX_LINEFEED_SIZE) { p = last - NGX_LINEFEED_SIZE; } ngx_linefeed(p); wrote_stderr = 0; debug_connection = (log->log_level & NGX_LOG_DEBUG_CONNECTION) != 0; while (log) { if (log->log_level < level && !debug_connection) { break; } if (log->writer) { log->writer(log, level, errstr, p - errstr); log = log->next; continue; } (void) ngx_write_fd(log->file->fd, errstr, p - errstr); if (log->file->fd == ngx_stderr) { wrote_stderr = 1; } log = log->next; } if (!ngx_use_stderr || level > NGX_LOG_WARN || wrote_stderr) { return; } msg -= (7 + err_levels[level].len + 3); (void) ngx_sprintf(msg, "nginx: [%V] ", &err_levels[level]); (void) ngx_write_console(ngx_stderr, msg, p - msg); } #if !(NGX_HAVE_VARIADIC_MACROS) void ngx_cdecl ngx_log_error(ngx_uint_t level, ngx_log_t *log, ngx_err_t err, const char *fmt, ...) { va_list args; if (log->log_level >= level) { va_start(args, fmt); ngx_log_error_core(level, log, err, fmt, args); va_end(args); } } void ngx_cdecl ngx_log_debug_core(ngx_log_t *log, ngx_err_t err, const char *fmt, ...) { va_list args; va_start(args, fmt); ngx_log_error_core(NGX_LOG_DEBUG, log, err, fmt, args); va_end(args); } #endif void ngx_cdecl ngx_log_abort(ngx_err_t err, const char *fmt, ...) { u_char *p; va_list args; u_char errstr[NGX_MAX_CONF_ERRSTR]; va_start(args, fmt); p = ngx_vsnprintf(errstr, sizeof(errstr) - 1, fmt, args); va_end(args); ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, err, "%*s", p - errstr, errstr); } void ngx_cdecl ngx_log_stderr(ngx_err_t err, const char *fmt, ...) { u_char *p, *last; va_list args; u_char errstr[NGX_MAX_ERROR_STR]; last = errstr + NGX_MAX_ERROR_STR; p = errstr + 7; ngx_memcpy(errstr, "nginx: ", 7); va_start(args, fmt); p = ngx_vslprintf(p, last, fmt, args); va_end(args); if (err) { p = ngx_log_errno(p, last, err); } if (p > last - NGX_LINEFEED_SIZE) { p = last - NGX_LINEFEED_SIZE; } ngx_linefeed(p); (void) ngx_write_console(ngx_stderr, errstr, p - errstr); } u_char * ngx_log_errno(u_char *buf, u_char *last, ngx_err_t err) { if (buf > last - 50) { /* leave a space for an error code */ buf = last - 50; *buf++ = '.'; *buf++ = '.'; *buf++ = '.'; } #if (NGX_WIN32) buf = ngx_slprintf(buf, last, ((unsigned) err < 0x80000000) ? " (%d: " : " (%Xd: ", err); #else buf = ngx_slprintf(buf, last, " (%d: ", err); #endif buf = ngx_strerror(err, buf, last - buf); if (buf < last) { *buf++ = ')'; } return buf; } ngx_log_t * ngx_log_init(u_char *prefix) { u_char *p, *name; size_t nlen, plen; ngx_log.file = &ngx_log_file; ngx_log.log_level = NGX_LOG_NOTICE; name = (u_char *) NGX_ERROR_LOG_PATH; /* * we use ngx_strlen() here since BCC warns about * condition is always false and unreachable code */ nlen = ngx_strlen(name); if (nlen == 0) { ngx_log_file.fd = ngx_stderr; return &ngx_log; } p = NULL; #if (NGX_WIN32) if (name[1] != ':') { #else if (name[0] != '/') { #endif if (prefix) { plen = ngx_strlen(prefix); } else { #ifdef NGX_PREFIX prefix = (u_char *) NGX_PREFIX; plen = ngx_strlen(prefix); #else plen = 0; #endif } if (plen) { name = malloc(plen + nlen + 2); if (name == NULL) { return NULL; } p = ngx_cpymem(name, prefix, plen); if (!ngx_path_separator(*(p - 1))) { *p++ = '/'; } ngx_cpystrn(p, (u_char *) NGX_ERROR_LOG_PATH, nlen + 1); p = name; } } ngx_log_file.fd = ngx_open_file(name, NGX_FILE_APPEND, NGX_FILE_CREATE_OR_OPEN, NGX_FILE_DEFAULT_ACCESS); if (ngx_log_file.fd == NGX_INVALID_FILE) { ngx_log_stderr(ngx_errno, "[alert] could not open error log file: " ngx_open_file_n " \"%s\" failed", name); #if (NGX_WIN32) ngx_event_log(ngx_errno, "could not open error log file: " ngx_open_file_n " \"%s\" failed", name); #endif ngx_log_file.fd = ngx_stderr; } if (p) { ngx_free(p); } return &ngx_log; } ngx_int_t ngx_log_open_default(ngx_cycle_t *cycle) { ngx_log_t *log; static ngx_str_t error_log = ngx_string(NGX_ERROR_LOG_PATH); if (ngx_log_get_file_log(&cycle->new_log) != NULL) { return NGX_OK; } if (cycle->new_log.log_level != 0) { /* there are some error logs, but no files */ log = ngx_pcalloc(cycle->pool, sizeof(ngx_log_t)); if (log == NULL) { return NGX_ERROR; } } else { /* no error logs at all */ log = &cycle->new_log; } log->log_level = NGX_LOG_ERR; log->file = ngx_conf_open_file(cycle, &error_log); if (log->file == NULL) { return NGX_ERROR; } if (log != &cycle->new_log) { ngx_log_insert(&cycle->new_log, log); } return NGX_OK; } ngx_int_t ngx_log_redirect_stderr(ngx_cycle_t *cycle) { ngx_fd_t fd; if (cycle->log_use_stderr) { return NGX_OK; } /* file log always exists when we are called */ fd = ngx_log_get_file_log(cycle->log)->file->fd; if (fd != ngx_stderr) { if (ngx_set_stderr(fd) == NGX_FILE_ERROR) { ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, ngx_set_stderr_n " failed"); return NGX_ERROR; } } return NGX_OK; } ngx_log_t * ngx_log_get_file_log(ngx_log_t *head) { ngx_log_t *log; for (log = head; log; log = log->next) { if (log->file != NULL) { return log; } } return NULL; } static char * ngx_log_set_levels(ngx_conf_t *cf, ngx_log_t *log) { ngx_uint_t i, n, d, found; ngx_str_t *value; if (cf->args->nelts == 2) { log->log_level = NGX_LOG_ERR; return NGX_CONF_OK; } value = cf->args->elts; for (i = 2; i < cf->args->nelts; i++) { found = 0; for (n = 1; n <= NGX_LOG_DEBUG; n++) { if (ngx_strcmp(value[i].data, err_levels[n].data) == 0) { if (log->log_level != 0) { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "duplicate log level \"%V\"", &value[i]); return NGX_CONF_ERROR; } log->log_level = n; found = 1; break; } } for (n = 0, d = NGX_LOG_DEBUG_FIRST; d <= NGX_LOG_DEBUG_LAST; d <<= 1) { if (ngx_strcmp(value[i].data, debug_levels[n++]) == 0) { if (log->log_level & ~NGX_LOG_DEBUG_ALL) { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "invalid log level \"%V\"", &value[i]); return NGX_CONF_ERROR; } log->log_level |= d; found = 1; break; } } if (!found) { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "invalid log level \"%V\"", &value[i]); return NGX_CONF_ERROR; } } if (log->log_level == NGX_LOG_DEBUG) { log->log_level = NGX_LOG_DEBUG_ALL; } return NGX_CONF_OK; } static char * ngx_error_log(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) { ngx_log_t *dummy; dummy = &cf->cycle->new_log; return ngx_log_set_log(cf, &dummy); } char * ngx_log_set_log(ngx_conf_t *cf, ngx_log_t **head) { ngx_log_t *new_log; ngx_str_t *value, name; ngx_syslog_peer_t *peer; if (*head != NULL && (*head)->log_level == 0) { new_log = *head; } else { new_log = ngx_pcalloc(cf->pool, sizeof(ngx_log_t)); if (new_log == NULL) { return NGX_CONF_ERROR; } if (*head == NULL) { *head = new_log; } } value = cf->args->elts; if (ngx_strcmp(value[1].data, "stderr") == 0) { ngx_str_null(&name); cf->cycle->log_use_stderr = 1; new_log->file = ngx_conf_open_file(cf->cycle, &name); if (new_log->file == NULL) { return NGX_CONF_ERROR; } } else if (ngx_strncmp(value[1].data, "syslog:", 7) == 0) { peer = ngx_pcalloc(cf->pool, sizeof(ngx_syslog_peer_t)); if (peer == NULL) { return NGX_CONF_ERROR; } if (ngx_syslog_process_conf(cf, peer) != NGX_CONF_OK) { return NGX_CONF_ERROR; } new_log->writer = ngx_syslog_writer; new_log->wdata = peer; } else { new_log->file = ngx_conf_open_file(cf->cycle, &value[1]); if (new_log->file == NULL) { return NGX_CONF_ERROR; } } if (ngx_log_set_levels(cf, new_log) != NGX_CONF_OK) { return NGX_CONF_ERROR; } if (*head != new_log) { ngx_log_insert(*head, new_log); } return NGX_CONF_OK; } static void ngx_log_insert(ngx_log_t *log, ngx_log_t *new_log) { ngx_log_t tmp; if (new_log->log_level > log->log_level) { /* * list head address is permanent, insert new log after * head and swap its contents with head */ tmp = *log; *log = *new_log; *new_log = tmp; log->next = new_log; return; } while (log->next) { if (new_log->log_level > log->next->log_level) { new_log->next = log->next; log->next = new_log; return; } log = log->next; } log->next = new_log; }