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 void 54 spdk_log_open(void) 55 { 56 openlog("spdk", LOG_PID, LOG_LOCAL7); 57 } 58 59 void 60 spdk_log_close(void) 61 { 62 closelog(); 63 } 64 65 #ifdef SPDK_LOG_BACKTRACE_LVL 66 static void 67 spdk_log_unwind_stack(FILE *fp, enum spdk_log_level level) 68 { 69 unw_error_t err; 70 unw_cursor_t cursor; 71 unw_context_t uc; 72 unw_word_t ip; 73 unw_word_t offp; 74 char f_name[64]; 75 int frame; 76 77 if (level > g_spdk_log_backtrace_level) { 78 return; 79 } 80 81 unw_getcontext(&uc); 82 unw_init_local(&cursor, &uc); 83 fprintf(fp, "*%s*: === BACKTRACE START ===\n", spdk_level_names[level]); 84 85 unw_step(&cursor); 86 for (frame = 1; unw_step(&cursor) > 0; frame++) { 87 unw_get_reg(&cursor, UNW_REG_IP, &ip); 88 err = unw_get_proc_name(&cursor, f_name, sizeof(f_name), &offp); 89 if (err || strcmp(f_name, "main") == 0) { 90 break; 91 } 92 93 fprintf(fp, "*%s*: %3d: %*s%s() at %#lx\n", spdk_level_names[level], frame, frame - 1, "", f_name, 94 (unsigned long)ip); 95 } 96 fprintf(fp, "*%s*: === BACKTRACE END ===\n", spdk_level_names[level]); 97 } 98 99 #else 100 #define spdk_log_unwind_stack(fp, lvl) 101 #endif 102 103 void 104 spdk_log(enum spdk_log_level level, const char *file, const int line, const char *func, 105 const char *format, ...) 106 { 107 int severity = LOG_INFO; 108 char buf[MAX_TMPBUF]; 109 va_list ap; 110 111 switch (level) { 112 case SPDK_LOG_ERROR: 113 severity = LOG_ERR; 114 break; 115 case SPDK_LOG_WARN: 116 severity = LOG_WARNING; 117 break; 118 case SPDK_LOG_NOTICE: 119 severity = LOG_NOTICE; 120 break; 121 case SPDK_LOG_INFO: 122 case SPDK_LOG_DEBUG: 123 severity = LOG_INFO; 124 break; 125 case SPDK_LOG_DISABLED: 126 return; 127 } 128 129 va_start(ap, format); 130 131 vsnprintf(buf, sizeof(buf), format, ap); 132 133 if (level <= g_spdk_log_print_level) { 134 fprintf(stderr, "%s:%4d:%s: *%s*: %s", file, line, func, spdk_level_names[level], buf); 135 spdk_log_unwind_stack(stderr, level); 136 } 137 138 if (level <= g_spdk_log_level) { 139 syslog(severity, "%s:%4d:%s: *%s*: %s", file, line, func, spdk_level_names[level], buf); 140 } 141 142 va_end(ap); 143 } 144 145 static void 146 fdump(FILE *fp, const char *label, const uint8_t *buf, size_t len) 147 { 148 char tmpbuf[MAX_TMPBUF]; 149 char buf16[16 + 1]; 150 size_t total; 151 unsigned int idx; 152 153 fprintf(fp, "%s\n", label); 154 155 memset(buf16, 0, sizeof buf16); 156 total = 0; 157 for (idx = 0; idx < len; idx++) { 158 if (idx != 0 && idx % 16 == 0) { 159 snprintf(tmpbuf + total, sizeof tmpbuf - total, 160 " %s", buf16); 161 fprintf(fp, "%s\n", tmpbuf); 162 total = 0; 163 } 164 if (idx % 16 == 0) { 165 total += snprintf(tmpbuf + total, sizeof tmpbuf - total, 166 "%08x ", idx); 167 } 168 if (idx % 8 == 0) { 169 total += snprintf(tmpbuf + total, sizeof tmpbuf - total, 170 "%s", " "); 171 } 172 total += snprintf(tmpbuf + total, sizeof tmpbuf - total, 173 "%2.2x ", buf[idx] & 0xff); 174 buf16[idx % 16] = isprint(buf[idx]) ? buf[idx] : '.'; 175 } 176 for (; idx % 16 != 0; idx++) { 177 if (idx == 8) { 178 total += snprintf(tmpbuf + total, sizeof tmpbuf - total, 179 " "); 180 } 181 182 total += snprintf(tmpbuf + total, sizeof tmpbuf - total, " "); 183 buf16[idx % 16] = ' '; 184 } 185 snprintf(tmpbuf + total, sizeof tmpbuf - total, " %s", buf16); 186 fprintf(fp, "%s\n", tmpbuf); 187 fflush(fp); 188 } 189 190 void 191 spdk_log_dump(FILE *fp, const char *label, const void *buf, size_t len) 192 { 193 fdump(fp, label, buf, len); 194 } 195