blkrawverify.c

   1 /*
   2  * block queue tracing application
   3  *
   4  * Copyright (C) 2006 Alan D. Brunelle <Alan.Brunelle@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 };
  53 #define N_TRACES (sizeof(traces) / sizeof(struct trace_info))
  54
  55 struct act_info {
  56         __u32 val;
  57         char *string;
  58 };
  59
  60 #define ACT_TO_STRING(f)        {.val = f, .string = #f}
  61 static struct act_info acts[] = {
  62         ACT_TO_STRING( __BLK_TA_QUEUE ),
  63         ACT_TO_STRING( __BLK_TA_QUEUE ),
  64         ACT_TO_STRING( __BLK_TA_BACKMERGE ),
  65         ACT_TO_STRING( __BLK_TA_FRONTMERGE ),
  66         ACT_TO_STRING( __BLK_TA_GETRQ ),
  67         ACT_TO_STRING( __BLK_TA_SLEEPRQ ),
  68         ACT_TO_STRING( __BLK_TA_REQUEUE ),
  69         ACT_TO_STRING( __BLK_TA_ISSUE ),
  70         ACT_TO_STRING( __BLK_TA_COMPLETE ),
  71         ACT_TO_STRING( __BLK_TA_PLUG ),
  72         ACT_TO_STRING( __BLK_TA_UNPLUG_IO ),
  73         ACT_TO_STRING( __BLK_TA_UNPLUG_TIMER ),
  74         ACT_TO_STRING( __BLK_TA_INSERT ),
  75         ACT_TO_STRING( __BLK_TA_SPLIT ),
  76         ACT_TO_STRING( __BLK_TA_BOUNCE ),
  77         ACT_TO_STRING( __BLK_TA_REMAP )
  78 };
  79 #define N_ACTS (sizeof(acts) / sizeof(struct act_info))
  80
  81 static char *act_to_str(__u32 action)
  82 {
  83         static char buf[1024];
  84         unsigned int i;
  85         unsigned int act = action & 0xffff;
  86         unsigned int trace = (action >> BLK_TC_SHIFT) & 0xffff;
  87
  88         if (act <= N_ACTS) {
  89                 sprintf(buf, "%s ", acts[act].string);
  90                 for (i = 0; i < N_TRACES; i++)
  91                         if (trace & (1 << i)) {
  92                                 char buf2[1024];
  93                                 sprintf(buf2, "| %s ", traces[i].string);
  94                                 strcat(buf, buf2);
  95                         }
  96         }
  97         else
  98                 sprintf(buf, "Invalid action=%08x", action);
  99
 100         return buf;
 101 }
 102
 103 static void dump_trace(FILE *ofp, char *prefix, struct blk_io_trace *bit)
 104 {
 105         fprintf(ofp, "    Dump %s\n", prefix);
 106         fprintf(ofp, "        %8s: %08x\n", "magic", bit->magic);
 107         fprintf(ofp, "        %8s: %u\n", "sequence", bit->sequence);
 108         fprintf(ofp, "        %8s: %llu\n", "time", (unsigned long long) bit->time);
 109         fprintf(ofp, "        %8s: %llu\n", "sector", (unsigned long long) bit->sector);
 110         fprintf(ofp, "        %8s: %u\n", "bytes", bit->bytes);
 111         fprintf(ofp, "        %8s: %s\n", "action", act_to_str(bit->action));
 112         fprintf(ofp, "        %8s: %u\n", "bytes", bit->bytes);
 113         fprintf(ofp, "        %8s: %u\n", "cpu", bit->cpu);
 114         fprintf(ofp, "        %8s: %u\n", "error", bit->error);
 115         fprintf(ofp, "        %8s: %u\n", "pdu_len", bit->pdu_len);
 116         fprintf(ofp, "        %8s: (%u,%u)\n\n", "device", MAJOR(bit->device),
 117                                                            MINOR(bit->device));
 118 }
 119
 120 static int process(FILE **fp, char *devname, char *file, unsigned int cpu)
 121 {
 122 #       define SWAP_BITS() do {                                         \
 123                 if (bit_save) {                                         \
 124                         struct blk_io_trace *tmp = bit_save;            \
 125                         bit_save = bit;                                 \
 126                         bit = tmp;                                      \
 127                 }                                                       \
 128                 else {                                                  \
 129                         bit_save = bit;                                 \
 130                         bit = malloc(sizeof(struct blk_io_trace));      \
 131                 }                                                       \
 132         } while (0)
 133
 134 #       define INC_BAD(str) do {                                        \
 135                 nbad++;                                                 \
 136                 fprintf(ofp, "    ----------------\n");                 \
 137                 if (bit_save) dump_trace(ofp,"seq-1",bit_save);         \
 138                 dump_trace(ofp, str, bit);                              \
 139                 SWAP_BITS();                                            \
 140         } while (0)
 141
 142         size_t n;
 143         FILE *ifp, *ofp;
 144         __u32 save_device = 0, save_sequence = 0;
 145         __u64 save_time = 0;
 146         struct blk_io_trace *bit_save = NULL;
 147         struct blk_io_trace *bit = malloc(sizeof(struct blk_io_trace));
 148         unsigned int ngood = 0;
 149         unsigned int nbad = 0;
 150         unsigned int nbad_trace = 0, nbad_pdu = 0, nbad_cpu = 0;
 151         unsigned int nbad_seq = 0, nbad_dev = 0, nbad_time = 0;
 152         char ofname[1024];
 153
 154         ifp = fopen(file, "r");
 155         if (!ifp)
 156                 return 0;
 157
 158         sprintf(ofname, "%s.verify.out", devname);
 159
 160         if (!*fp) {
 161                 *fp = fopen(ofname, "w");
 162                 if (*fp == NULL) {
 163                         fprintf(stderr,"Failed to open %s (%s), skipping\n",
 164                                 ofname, strerror(errno));
 165                         fclose(ifp);
 166                         return 0;
 167                 }
 168                 fprintf(*fp, "\n---------------\n" );
 169                 fprintf(*fp, "Verifying %s\n", devname);
 170         }
 171
 172         ofp = *fp;
 173         while ((n = fread(bit, sizeof(struct blk_io_trace), 1, ifp)) == 1) {
 174                 if (ferror(ifp)) {
 175                         clearerr(ifp);
 176                         perror("fread");
 177                         break;
 178                 }
 179                 if (data_is_native == -1)
 180                         check_data_endianness(bit->magic);
 181
 182                 trace_to_cpu(bit);
 183
 184                 if (!CHECK_MAGIC(bit)) {
 185                         INC_BAD("bad trace");
 186                         continue;
 187                 }
 188
 189                 if ((bit->magic & 0xff) != SUPPORTED_VERSION) {
 190                         fprintf(stderr, "unsupported trace version\n");
 191                         break;
 192                 }
 193
 194                 if (bit->pdu_len) {
 195                         char *pdu_buf;
 196
 197                         pdu_buf = malloc(bit->pdu_len);
 198                         n = fread(pdu_buf, bit->pdu_len, 1, ifp);
 199                         if (n == 0) {
 200                                 INC_BAD("bad pdu");
 201                                 nbad_seq++;
 202                                 break;
 203                         }
 204                         free(pdu_buf);
 205                 }
 206
 207                 if (bit->cpu != cpu) {
 208                         INC_BAD("bad cpu");
 209                         nbad_cpu++;
 210                         continue;
 211                 }
 212
 213                 /*
 214                  * skip notify traces, they don't have valid sequences
 215                  */
 216                 if (bit->action & BLK_TC_ACT(BLK_TC_NOTIFY))
 217                         continue;
 218
 219                 if (ngood) {
 220                         if (bit->sequence <= save_sequence) {
 221                                 INC_BAD("bad seq");
 222                                 nbad_seq++;
 223                                 continue;
 224                         }
 225                         else if (bit->time <= save_time) {
 226                                 INC_BAD("time regression");
 227                                 nbad_time++;
 228                                 continue;
 229                         }
 230                         else if (bit->device != save_device) {
 231                                 INC_BAD("bad dev");
 232                                 nbad_dev++;
 233                                 continue;
 234                         }
 235                 }
 236
 237                 save_sequence = bit->sequence;
 238                 save_time = bit->time;
 239                 save_device = bit->device;
 240
 241                 ngood++;
 242                 SWAP_BITS();
 243         }
 244
 245         if (n == 0 && !feof(ifp))
 246                 fprintf(stderr,"%s: fread failed %d/%s\n",
 247                         file, errno, strerror(errno));
 248         fclose(ifp);
 249
 250         fprintf(ofp, "    ---------------------\n");
 251         fprintf(ofp, "    Summary for cpu %d:\n", cpu);
 252         fprintf(ofp, "    %10d valid + %10d invalid (%5.1f%%) processed\n\n",
 253                 ngood, nbad,
 254                 ngood ? 100.0 * (float)ngood / (float)(ngood + nbad) : 0.0);
 255
 256         if (nbad) {
 257                 if (nbad_trace)
 258                         fprintf(ofp, "%8s %d traces\n", "", nbad_trace);
 259                 if (nbad_trace)
 260                         fprintf(ofp, "%8s %d pdu\n", "", nbad_pdu);
 261                 if (nbad_cpu)
 262                         fprintf(ofp, "%8s %d cpu\n", "", nbad_cpu);
 263                 if (nbad_seq)
 264                         fprintf(ofp, "%8s %d seq\n", "", nbad_seq);
 265                 if (nbad_dev)
 266                         fprintf(ofp, "%8s %d dev\n", "", nbad_dev);
 267                 if (nbad_time)
 268                         fprintf(ofp, "%8s %d time\n", "", nbad_time);
 269                 fprintf(ofp,"\n");
 270         }
 271
 272         return nbad;
 273 }
 274
 275 int main(int argc, char *argv[])
 276 {
 277         char *devname;
 278         struct stat st;
 279         int i, cpu, nbad, rval = 0;
 280         FILE *ofp;
 281         char *ofname = malloc(1024);
 282         char *fname = malloc(1024);
 283
 284         if (argc < 2) {
 285                 fprintf(stderr,"FATAL: Need device name(s)\n");
 286                 fprintf(stderr,"Usage: blkrawverify <dev> [<dev>...]\n");
 287                 exit(1);
 288         }
 289
 290         for (i = 1; i < argc; i++) {
 291                 devname = argv[i];
 292                 sprintf(ofname, "%s.verify.out", devname);
 293                 ofp = NULL;
 294
 295                 printf("Verifying %s\n", devname); fflush(stdout);
 296                 for (cpu = 0; ; cpu++) {
 297                         sprintf(fname, "%s.blktrace.%d", devname, cpu);
 298                         if (stat(fname, &st) < 0)
 299                                 break;
 300                         printf("    CPU %d ", cpu); fflush(stdout);
 301                         nbad = process(&ofp, devname, fname, cpu);
 302                         if (nbad) {
 303                                 printf("-- %d bad", nbad);
 304                                 rval = 1;
 305                         }
 306                         printf("\n");
 307                 }
 308                 if (ofp) {
 309                         fclose(ofp);
 310                         fprintf(stdout, "Wrote output to %s\n", ofname);
 311                 }
 312         }
 313
 314         return rval;
 315 }