1 /*- 2 * BSD LICENSE 3 * 4 * Copyright (c) Intel Corporation. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 11 * * Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * * Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in 15 * the documentation and/or other materials provided with the 16 * distribution. 17 * * Neither the name of Intel Corporation nor the names of its 18 * contributors may be used to endorse or promote products derived 19 * from this software without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 22 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 24 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 25 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 27 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 #include "spdk/stdinc.h" 35 36 #include "spdk_internal/log.h" 37 38 #ifdef SPDK_LOG_BACKTRACE_LVL 39 #define UNW_LOCAL_ONLY 40 #include <libunwind.h> 41 #endif 42 43 static const char *const spdk_level_names[] = { 44 [SPDK_LOG_ERROR] = "ERROR", 45 [SPDK_LOG_WARN] = "WARNING", 46 [SPDK_LOG_NOTICE] = "NOTICE", 47 [SPDK_LOG_INFO] = "INFO", 48 [SPDK_LOG_DEBUG] = "DEBUG", 49 }; 50 51 #define MAX_TMPBUF 1024 52 53 static logfunc *g_log = NULL; 54 55 void 56 spdk_log_open(logfunc *logf) 57 { 58 if (logf) { 59 g_log = logf; 60 } else { 61 openlog("spdk", LOG_PID, LOG_LOCAL7); 62 } 63 } 64 65 void 66 spdk_log_close(void) 67 { 68 if (!g_log) { 69 closelog(); 70 } 71 } 72 73 #ifdef SPDK_LOG_BACKTRACE_LVL 74 static void 75 spdk_log_unwind_stack(FILE *fp, enum spdk_log_level level) 76 { 77 unw_error_t err; 78 unw_cursor_t cursor; 79 unw_context_t uc; 80 unw_word_t ip; 81 unw_word_t offp; 82 char f_name[64]; 83 int frame; 84 85 if (level > g_spdk_log_backtrace_level) { 86 return; 87 } 88 89 unw_getcontext(&uc); 90 unw_init_local(&cursor, &uc); 91 fprintf(fp, "*%s*: === BACKTRACE START ===\n", spdk_level_names[level]); 92 93 unw_step(&cursor); 94 for (frame = 1; unw_step(&cursor) > 0; frame++) { 95 unw_get_reg(&cursor, UNW_REG_IP, &ip); 96 err = unw_get_proc_name(&cursor, f_name, sizeof(f_name), &offp); 97 if (err || strcmp(f_name, "main") == 0) { 98 break; 99 } 100 101 fprintf(fp, "*%s*: %3d: %*s%s() at %#lx\n", spdk_level_names[level], frame, frame - 1, "", f_name, 102 (unsigned long)ip); 103 } 104 fprintf(fp, "*%s*: === BACKTRACE END ===\n", spdk_level_names[level]); 105 } 106 107 #else 108 #define spdk_log_unwind_stack(fp, lvl) 109 #endif 110 111 void 112 spdk_log(enum spdk_log_level level, const char *file, const int line, const char *func, 113 const char *format, ...) 114 { 115 int severity = LOG_INFO; 116 char buf[MAX_TMPBUF]; 117 va_list ap; 118 119 if (g_log) { 120 va_start(ap, format); 121 g_log(level, file, line, func, format, ap); 122 va_end(ap); 123 return; 124 } 125 126 if (level > g_spdk_log_print_level && level > g_spdk_log_level) { 127 return; 128 } 129 130 switch (level) { 131 case SPDK_LOG_ERROR: 132 severity = LOG_ERR; 133 break; 134 case SPDK_LOG_WARN: 135 severity = LOG_WARNING; 136 break; 137 case SPDK_LOG_NOTICE: 138 severity = LOG_NOTICE; 139 break; 140 case SPDK_LOG_INFO: 141 case SPDK_LOG_DEBUG: 142 severity = LOG_INFO; 143 break; 144 case SPDK_LOG_DISABLED: 145 return; 146 } 147 148 va_start(ap, format); 149 150 vsnprintf(buf, sizeof(buf), format, ap); 151 152 if (level <= g_spdk_log_print_level) { 153 fprintf(stderr, "%s:%4d:%s: *%s*: %s", file, line, func, spdk_level_names[level], buf); 154 spdk_log_unwind_stack(stderr, level); 155 } 156 157 if (level <= g_spdk_log_level) { 158 syslog(severity, "%s:%4d:%s: *%s*: %s", file, line, func, spdk_level_names[level], buf); 159 } 160 161 va_end(ap); 162 } 163 164 static void 165 fdump(FILE *fp, const char *label, const uint8_t *buf, size_t len) 166 { 167 char tmpbuf[MAX_TMPBUF]; 168 char buf16[16 + 1]; 169 size_t total; 170 unsigned int idx; 171 172 fprintf(fp, "%s\n", label); 173 174 memset(buf16, 0, sizeof buf16); 175 total = 0; 176 for (idx = 0; idx < len; idx++) { 177 if (idx != 0 && idx % 16 == 0) { 178 snprintf(tmpbuf + total, sizeof tmpbuf - total, 179 " %s", buf16); 180 fprintf(fp, "%s\n", tmpbuf); 181 total = 0; 182 } 183 if (idx % 16 == 0) { 184 total += snprintf(tmpbuf + total, sizeof tmpbuf - total, 185 "%08x ", idx); 186 } 187 if (idx % 8 == 0) { 188 total += snprintf(tmpbuf + total, sizeof tmpbuf - total, 189 "%s", " "); 190 } 191 total += snprintf(tmpbuf + total, sizeof tmpbuf - total, 192 "%2.2x ", buf[idx] & 0xff); 193 buf16[idx % 16] = isprint(buf[idx]) ? buf[idx] : '.'; 194 } 195 for (; idx % 16 != 0; idx++) { 196 if (idx == 8) { 197 total += snprintf(tmpbuf + total, sizeof tmpbuf - total, 198 " "); 199 } 200 201 total += snprintf(tmpbuf + total, sizeof tmpbuf - total, " "); 202 buf16[idx % 16] = ' '; 203 } 204 snprintf(tmpbuf + total, sizeof tmpbuf - total, " %s", buf16); 205 fprintf(fp, "%s\n", tmpbuf); 206 fflush(fp); 207 } 208 209 void 210 spdk_log_dump(FILE *fp, const char *label, const void *buf, size_t len) 211 { 212 fdump(fp, label, buf, len); 213 } 214