1 /* 2 * block queue tracing application 3 * 4 * Copyright (C) 2006 Alan D. Brunelle <Alan.Brunelle (at) hp.com> 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or 9 * (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 19 * 20 */ 21 #include <stdio.h> 22 #include <stdlib.h> 23 #include <string.h> 24 #include <errno.h> 25 #include <sys/types.h> 26 #include <sys/stat.h> 27 #include <unistd.h> 28 29 #include "blktrace.h" 30 31 struct trace_info { 32 int bit_field; 33 char *string; 34 }; 35 36 int data_is_native = -1; 37 38 #define TRACE_TO_STRING(f) {.bit_field = f, .string = #f} 39 static struct trace_info traces[] = { 40 TRACE_TO_STRING( BLK_TC_READ ), 41 TRACE_TO_STRING( BLK_TC_WRITE ), 42 TRACE_TO_STRING( BLK_TC_BARRIER ), 43 TRACE_TO_STRING( BLK_TC_SYNC ), 44 TRACE_TO_STRING( BLK_TC_QUEUE ), 45 TRACE_TO_STRING( BLK_TC_REQUEUE ), 46 TRACE_TO_STRING( BLK_TC_ISSUE ), 47 TRACE_TO_STRING( BLK_TC_COMPLETE ), 48 TRACE_TO_STRING( BLK_TC_FS ), 49 TRACE_TO_STRING( BLK_TC_PC ), 50 TRACE_TO_STRING( BLK_TC_AHEAD ), 51 TRACE_TO_STRING( BLK_TC_META ), 52 TRACE_TO_STRING( BLK_TC_DISCARD ), 53 }; 54 #define N_TRACES (sizeof(traces) / sizeof(struct trace_info)) 55 56 struct act_info { 57 __u32 val; 58 char *string; 59 }; 60 61 #define ACT_TO_STRING(f) {.val = f, .string = #f} 62 static struct act_info acts[] = { 63 ACT_TO_STRING( __BLK_TA_QUEUE ), 64 ACT_TO_STRING( __BLK_TA_QUEUE ), 65 ACT_TO_STRING( __BLK_TA_BACKMERGE ), 66 ACT_TO_STRING( __BLK_TA_FRONTMERGE ), 67 ACT_TO_STRING( __BLK_TA_GETRQ ), 68 ACT_TO_STRING( __BLK_TA_SLEEPRQ ), 69 ACT_TO_STRING( __BLK_TA_REQUEUE ), 70 ACT_TO_STRING( __BLK_TA_ISSUE ), 71 ACT_TO_STRING( __BLK_TA_COMPLETE ), 72 ACT_TO_STRING( __BLK_TA_PLUG ), 73 ACT_TO_STRING( __BLK_TA_UNPLUG_IO ), 74 ACT_TO_STRING( __BLK_TA_UNPLUG_TIMER ), 75 ACT_TO_STRING( __BLK_TA_INSERT ), 76 ACT_TO_STRING( __BLK_TA_SPLIT ), 77 ACT_TO_STRING( __BLK_TA_BOUNCE ), 78 ACT_TO_STRING( __BLK_TA_REMAP ) 79 }; 80 #define N_ACTS (sizeof(acts) / sizeof(struct act_info)) 81 82 static char *act_to_str(__u32 action) 83 { 84 static char buf[1024]; 85 unsigned int i; 86 unsigned int act = action & 0xffff; 87 unsigned int trace = (action >> BLK_TC_SHIFT) & 0xffff; 88 89 if (act <= N_ACTS) { 90 sprintf(buf, "%s ", acts[act].string); 91 for (i = 0; i < N_TRACES; i++) 92 if (trace & (1 << i)) { 93 char buf2[1024]; 94 sprintf(buf2, "| %s ", traces[i].string); 95 strcat(buf, buf2); 96 } 97 } 98 else 99 sprintf(buf, "Invalid action=%08x", action); 100 101 return buf; 102 } 103 104 static void dump_trace(FILE *ofp, char *prefix, struct blk_io_trace *bit) 105 { 106 fprintf(ofp, " Dump %s\n", prefix); 107 fprintf(ofp, " %8s: %08x\n", "magic", bit->magic); 108 fprintf(ofp, " %8s: %u\n", "sequence", bit->sequence); 109 fprintf(ofp, " %8s: %llu\n", "time", (unsigned long long) bit->time); 110 fprintf(ofp, " %8s: %llu\n", "sector", (unsigned long long) bit->sector); 111 fprintf(ofp, " %8s: %u\n", "bytes", bit->bytes); 112 fprintf(ofp, " %8s: %s\n", "action", act_to_str(bit->action)); 113 fprintf(ofp, " %8s: %u\n", "bytes", bit->bytes); 114 fprintf(ofp, " %8s: %u\n", "cpu", bit->cpu); 115 fprintf(ofp, " %8s: %u\n", "error", bit->error); 116 fprintf(ofp, " %8s: %u\n", "pdu_len", bit->pdu_len); 117 fprintf(ofp, " %8s: (%u,%u)\n\n", "device", MAJOR(bit->device), 118 MINOR(bit->device)); 119 } 120 121 static int process(FILE **fp, char *devname, char *file, unsigned int cpu) 122 { 123 # define SWAP_BITS() do { \ 124 if (bit_save) { \ 125 struct blk_io_trace *tmp = bit_save; \ 126 bit_save = bit; \ 127 bit = tmp; \ 128 } \ 129 else { \ 130 bit_save = bit; \ 131 bit = malloc(sizeof(struct blk_io_trace)); \ 132 } \ 133 } while (0) 134 135 # define INC_BAD(str) do { \ 136 nbad++; \ 137 fprintf(ofp, " ----------------\n"); \ 138 if (bit_save) dump_trace(ofp,"seq-1",bit_save); \ 139 dump_trace(ofp, str, bit); \ 140 SWAP_BITS(); \ 141 } while (0) 142 143 size_t n; 144 FILE *ifp, *ofp; 145 __u32 save_device = 0, save_sequence = 0; 146 __u64 save_time = 0; 147 struct blk_io_trace *bit_save = NULL; 148 struct blk_io_trace *bit = malloc(sizeof(struct blk_io_trace)); 149 unsigned int ngood = 0; 150 unsigned int nbad = 0; 151 unsigned int nbad_trace = 0, nbad_pdu = 0, nbad_cpu = 0; 152 unsigned int nbad_seq = 0, nbad_dev = 0, nbad_time = 0; 153 char ofname[1024]; 154 155 ifp = fopen(file, "r"); 156 if (!ifp) 157 return 0; 158 159 sprintf(ofname, "%s.verify.out", devname); 160 161 if (!*fp) { 162 *fp = fopen(ofname, "w"); 163 if (*fp == NULL) { 164 fprintf(stderr,"Failed to open %s (%s), skipping\n", 165 ofname, strerror(errno)); 166 fclose(ifp); 167 return 0; 168 } 169 fprintf(*fp, "\n---------------\n" ); 170 fprintf(*fp, "Verifying %s\n", devname); 171 } 172 173 ofp = *fp; 174 while ((n = fread(bit, sizeof(struct blk_io_trace), 1, ifp)) == 1) { 175 if (ferror(ifp)) { 176 clearerr(ifp); 177 perror("fread"); 178 break; 179 } 180 if (data_is_native == -1) 181 check_data_endianness(bit->magic); 182 183 trace_to_cpu(bit); 184 185 if (!CHECK_MAGIC(bit)) { 186 INC_BAD("bad trace"); 187 continue; 188 } 189 190 if ((bit->magic & 0xff) != SUPPORTED_VERSION) { 191 fprintf(stderr, "unsupported trace version\n"); 192 break; 193 } 194 195 if (bit->pdu_len) { 196 char *pdu_buf; 197 198 pdu_buf = malloc(bit->pdu_len); 199 n = fread(pdu_buf, bit->pdu_len, 1, ifp); 200 if (n == 0) { 201 INC_BAD("bad pdu"); 202 nbad_seq++; 203 break; 204 } 205 free(pdu_buf); 206 } 207 208 if (bit->cpu != cpu) { 209 INC_BAD("bad cpu"); 210 nbad_cpu++; 211 continue; 212 } 213 214 /* 215 * skip notify traces, they don't have valid sequences 216 */ 217 if (bit->action & BLK_TC_ACT(BLK_TC_NOTIFY)) 218 continue; 219 220 if (ngood) { 221 if (bit->sequence <= save_sequence) { 222 INC_BAD("bad seq"); 223 nbad_seq++; 224 continue; 225 } 226 else if (bit->time <= save_time) { 227 INC_BAD("time regression"); 228 nbad_time++; 229 continue; 230 } 231 else if (bit->device != save_device) { 232 INC_BAD("bad dev"); 233 nbad_dev++; 234 continue; 235 } 236 } 237 238 save_sequence = bit->sequence; 239 save_time = bit->time; 240 save_device = bit->device; 241 242 ngood++; 243 SWAP_BITS(); 244 } 245 246 if (n == 0 && !feof(ifp)) 247 fprintf(stderr,"%s: fread failed %d/%s\n", 248 file, errno, strerror(errno)); 249 fclose(ifp); 250 251 fprintf(ofp, " ---------------------\n"); 252 fprintf(ofp, " Summary for cpu %d:\n", cpu); 253 fprintf(ofp, " %10d valid + %10d invalid (%5.1f%%) processed\n\n", 254 ngood, nbad, 255 ngood ? 100.0 * (float)ngood / (float)(ngood + nbad) : 0.0); 256 257 if (nbad) { 258 if (nbad_trace) 259 fprintf(ofp, "%8s %d traces\n", "", nbad_trace); 260 if (nbad_trace) 261 fprintf(ofp, "%8s %d pdu\n", "", nbad_pdu); 262 if (nbad_cpu) 263 fprintf(ofp, "%8s %d cpu\n", "", nbad_cpu); 264 if (nbad_seq) 265 fprintf(ofp, "%8s %d seq\n", "", nbad_seq); 266 if (nbad_dev) 267 fprintf(ofp, "%8s %d dev\n", "", nbad_dev); 268 if (nbad_time) 269 fprintf(ofp, "%8s %d time\n", "", nbad_time); 270 fprintf(ofp,"\n"); 271 } 272 273 return nbad; 274 } 275 276 int main(int argc, char *argv[]) 277 { 278 char *devname; 279 struct stat st; 280 int i, cpu, nbad, rval = 0; 281 FILE *ofp; 282 char *ofname = malloc(1024); 283 char *fname = malloc(1024); 284 285 if (argc < 2) { 286 fprintf(stderr,"FATAL: Need device name(s)\n"); 287 fprintf(stderr,"Usage: blkrawverify <dev> [<dev>...]\n"); 288 exit(1); 289 } 290 291 for (i = 1; i < argc; i++) { 292 devname = argv[i]; 293 sprintf(ofname, "%s.verify.out", devname); 294 ofp = NULL; 295 296 printf("Verifying %s\n", devname); fflush(stdout); 297 for (cpu = 0; ; cpu++) { 298 sprintf(fname, "%s.blktrace.%d", devname, cpu); 299 if (stat(fname, &st) < 0) { 300 if (cpu == 0) { 301 fprintf(stderr, "No tracefiles found for %s\n", 302 devname); 303 rval = 1; 304 } 305 break; 306 } 307 printf(" CPU %d ", cpu); fflush(stdout); 308 nbad = process(&ofp, devname, fname, cpu); 309 if (nbad) { 310 printf("-- %d bad", nbad); 311 rval = 1; 312 } 313 printf("\n"); 314 } 315 if (ofp) { 316 fclose(ofp); 317 fprintf(stdout, "Wrote output to %s\n", ofname); 318 } 319 } 320 321 return rval; 322 } 323
