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 };
  51 #define N_TRACES (sizeof(traces) / sizeof(struct trace_info))
  52
  53 struct act_info {
  54         __u32 val;
  55         char *string;
  56 };
  57
  58 #define ACT_TO_STRING(f)        {.val = f, .string = #f}
  59 static struct act_info acts[] = {
  60         ACT_TO_STRING( __BLK_TA_QUEUE ),
  61         ACT_TO_STRING( __BLK_TA_QUEUE ),
  62         ACT_TO_STRING( __BLK_TA_BACKMERGE ),
  63         ACT_TO_STRING( __BLK_TA_FRONTMERGE ),
  64         ACT_TO_STRING( __BLK_TA_GETRQ ),
  65         ACT_TO_STRING( __BLK_TA_SLEEPRQ ),
  66         ACT_TO_STRING( __BLK_TA_REQUEUE ),
  67         ACT_TO_STRING( __BLK_TA_ISSUE ),
  68         ACT_TO_STRING( __BLK_TA_COMPLETE ),
  69         ACT_TO_STRING( __BLK_TA_PLUG ),
  70         ACT_TO_STRING( __BLK_TA_UNPLUG_IO ),
  71         ACT_TO_STRING( __BLK_TA_UNPLUG_TIMER ),
  72         ACT_TO_STRING( __BLK_TA_INSERT ),
  73         ACT_TO_STRING( __BLK_TA_SPLIT ),
  74         ACT_TO_STRING( __BLK_TA_BOUNCE ),
  75         ACT_TO_STRING( __BLK_TA_REMAP )
  76 };
  77 #define N_ACTS (sizeof(acts) / sizeof(struct act_info))
  78
  79 static char *act_to_str(__u32 action)
  80 {
  81         static char buf[1024];
  82         unsigned int i;
  83         unsigned int act = action & 0xffff;
  84         unsigned int trace = (action >> BLK_TC_SHIFT) & 0xffff;
  85
  86         if (act <= N_ACTS) {
  87                 sprintf(buf, "%s ", acts[act].string);
  88                 for (i = 0; i < N_TRACES; i++)
  89                         if (trace & (1 << i)) {
  90                                 char buf2[1024];
  91                                 sprintf(buf2, "| %s ", traces[i].string);
  92                                 strcat(buf, buf2);
  93                         }
  94         }
  95         else
  96                 sprintf(buf, "Invalid action=%08x", action);
  97
  98         return buf;
  99 }
 100
 101 static void dump_trace(FILE *ofp, char *prefix, struct blk_io_trace *bit)
 102 {
 103         fprintf(ofp, "    Dump %s\n", prefix);
 104         fprintf(ofp, "        %8s: %08x\n", "magic", bit->magic);
 105         fprintf(ofp, "        %8s: %u\n", "sequence", bit->sequence);
 106         fprintf(ofp, "        %8s: %llu\n", "time", (unsigned long long) bit->time);
 107         fprintf(ofp, "        %8s: %llu\n", "sector", (unsigned long long) bit->sector);
 108         fprintf(ofp, "        %8s: %u\n", "bytes", bit->bytes);
 109         fprintf(ofp, "        %8s: %s\n", "action", act_to_str(bit->action));
 110         fprintf(ofp, "        %8s: %u\n", "bytes", bit->bytes);
 111         fprintf(ofp, "        %8s: %u\n", "cpu", bit->cpu);
 112         fprintf(ofp, "        %8s: %u\n", "error", bit->error);
 113         fprintf(ofp, "        %8s: %u\n", "pdu_len", bit->pdu_len);
 114         fprintf(ofp, "        %8s: (%u,%u)\n\n", "device", MAJOR(bit->device),
 115                                                            MINOR(bit->device));
 116 }
 117
 118 static int process(FILE **fp, char *devname, char *file, unsigned int cpu)
 119 {
 120 #       define SWAP_BITS() do {                                         \
 121                 if (bit_save) {                                         \
 122                         struct blk_io_trace *tmp = bit_save;            \
 123                         bit_save = bit;                                 \
 124                         bit = tmp;                                      \
 125                 }                                                       \
 126                 else {                                                  \
 127                         bit_save = bit;                                 \
 128                         bit = malloc(sizeof(struct blk_io_trace));      \
 129                 }                                                       \
 130         } while (0)
 131
 132 #       define INC_BAD(str) do {                                        \
 133                 nbad++;                                                 \
 134                 fprintf(ofp, "    ----------------\n");                 \
 135                 if (bit_save) dump_trace(ofp,"seq-1",bit_save);         \
 136                 dump_trace(ofp, str, bit);                              \
 137                 SWAP_BITS();                                            \
 138         } while (0)
 139
 140         size_t n;
 141         FILE *ifp, *ofp;
 142         __u32 save_device = 0, save_sequence = 0;
 143         __u64 save_time = 0;
 144         struct blk_io_trace *bit_save = NULL;
 145         struct blk_io_trace *bit = malloc(sizeof(struct blk_io_trace));
 146         unsigned int ngood = 0;
 147         unsigned int nbad = 0;
 148         unsigned int nbad_trace = 0, nbad_pdu = 0, nbad_cpu = 0;
 149         unsigned int nbad_seq = 0, nbad_dev = 0, nbad_time = 0;
 150         char ofname[1024];
 151
 152         ifp = fopen(file, "r");
 153         if (!ifp)
 154                 return 0;
 155
 156         sprintf(ofname, "%s.verify.out", devname);
 157
 158         if (!*fp) {
 159                 *fp = fopen(ofname, "w");
 160                 if (*fp == NULL) {
 161                         fprintf(stderr,"Failed to open %s (%s), skipping\n",
 162                                 ofname, strerror(errno));
 163                         fclose(ifp);
 164                         return 0;
 165                 }
 166                 fprintf(*fp, "\n---------------\n" );
 167                 fprintf(*fp, "Verifying %s\n", devname);
 168         }
 169
 170         ofp = *fp;
 171         while ((n = fread(bit, sizeof(struct blk_io_trace), 1, ifp)) == 1) {
 172                 if (data_is_native == -1)
 173                         check_data_endianness(bit->magic);
 174
 175                 trace_to_cpu(bit);
 176
 177                 if (!CHECK_MAGIC(bit)) {
 178                         INC_BAD("bad trace");
 179                         continue;
 180                 }
 181
 182                 if ((bit->magic & 0xff) != SUPPORTED_VERSION) {
 183                         fprintf(stderr, "unsupported trace version\n");
 184                         break;
 185                 }
 186
 187                 if (bit->pdu_len) {
 188                         char *pdu_buf;
 189
 190                         pdu_buf = malloc(bit->pdu_len);
 191                         n = fread(pdu_buf, bit->pdu_len, 1, ifp);
 192                         if (n == 0) {
 193                                 INC_BAD("bad pdu");
 194                                 nbad_seq++;
 195                                 break;
 196                         }
 197                         free(pdu_buf);
 198                 }
 199
 200                 if (bit->cpu != cpu) {
 201                         INC_BAD("bad cpu");
 202                         nbad_cpu++;
 203                         continue;
 204                 }
 205
 206                 /*
 207                  * skip notify traces, they don't have valid sequences
 208                  */
 209                 if (bit->action & BLK_TC_ACT(BLK_TC_NOTIFY))
 210                         continue;
 211
 212                 if (ngood) {
 213                         if (bit->sequence <= save_sequence) {
 214                                 INC_BAD("bad seq");
 215                                 nbad_seq++;
 216                                 continue;
 217                         }
 218                         else if (bit->time <= save_time) {
 219                                 INC_BAD("time regression");
 220                                 nbad_time++;
 221                                 continue;
 222                         }
 223                         else if (bit->device != save_device) {
 224                                 INC_BAD("bad dev");
 225                                 nbad_dev++;
 226                                 continue;
 227                         }
 228                 }
 229
 230                 save_sequence = bit->sequence;
 231                 save_time = bit->time;
 232                 save_device = bit->device;
 233
 234                 ngood++;
 235                 SWAP_BITS();
 236         }
 237
 238         if (n == 0 && !feof(ifp))
 239                 fprintf(stderr,"%s: fread failed %d/%s\n",
 240                         file, errno, strerror(errno));
 241         fclose(ifp);
 242
 243         fprintf(ofp, "    ---------------------\n");
 244         fprintf(ofp, "    Summary for cpu %d:\n", cpu);
 245         fprintf(ofp, "    %10d valid + %10d invalid (%5.1f%%) processed\n\n",
 246                 ngood, nbad,
 247                 ngood ? 100.0 * (float)ngood / (float)(ngood + nbad) : 0.0);
 248
 249         if (nbad) {
 250                 if (nbad_trace)
 251                         fprintf(ofp, "%8s %d traces\n", "", nbad_trace);
 252                 if (nbad_trace)
 253                         fprintf(ofp, "%8s %d pdu\n", "", nbad_pdu);
 254                 if (nbad_cpu)
 255                         fprintf(ofp, "%8s %d cpu\n", "", nbad_cpu);
 256                 if (nbad_seq)
 257                         fprintf(ofp, "%8s %d seq\n", "", nbad_seq);
 258                 if (nbad_dev)
 259                         fprintf(ofp, "%8s %d dev\n", "", nbad_dev);
 260                 if (nbad_time)
 261                         fprintf(ofp, "%8s %d time\n", "", nbad_time);
 262                 fprintf(ofp,"\n");
 263         }
 264
 265         return nbad;
 266 }
 267
 268 int main(int argc, char *argv[])
 269 {
 270         char *devname;
 271         struct stat st;
 272         int i, cpu, nbad;
 273         FILE *ofp;
 274         char *ofname = malloc(1024);
 275         char *fname = malloc(1024);
 276
 277         if (argc < 2) {
 278                 fprintf(stderr,"FATAL: Need device name(s)\n");
 279                 fprintf(stderr,"Usage: blkrawverify <dev> [<dev>...]\n");
 280                 exit(1);
 281         }
 282
 283         for (i = 1; i < argc; i++) {
 284                 devname = argv[i];
 285                 sprintf(ofname, "%s.verify.out", devname);
 286                 ofp = NULL;
 287
 288                 printf("Verifying %s\n", devname); fflush(stdout);
 289                 for (cpu = 0; ; cpu++) {
 290                         sprintf(fname, "%s.blktrace.%d", devname, cpu);
 291                         if (stat(fname, &st) < 0)
 292                                 break;
 293                         printf("    CPU %d ", cpu); fflush(stdout);
 294                         nbad = process(&ofp, devname, fname, cpu);
 295                         if (nbad)
 296                                 printf("-- %d bad", nbad);
 297                         printf("\n");
 298                 }
 299                 if (ofp) {
 300                         fclose(ofp);
 301                         fprintf(stdout, "Wrote output to %s\n", ofname);
 302                 }
 303         }
 304
 305         return 0;
 306 }