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 #define TRACE_TO_STRING(f)      {.bit_field = f, .string = #f}
  37 static struct trace_info traces[] = {
  38         TRACE_TO_STRING( BLK_TC_READ ),
  39         TRACE_TO_STRING( BLK_TC_WRITE ),
  40         TRACE_TO_STRING( BLK_TC_BARRIER ),
  41         TRACE_TO_STRING( BLK_TC_SYNC ),
  42         TRACE_TO_STRING( BLK_TC_QUEUE ),
  43         TRACE_TO_STRING( BLK_TC_REQUEUE ),
  44         TRACE_TO_STRING( BLK_TC_ISSUE ),
  45         TRACE_TO_STRING( BLK_TC_COMPLETE ),
  46         TRACE_TO_STRING( BLK_TC_FS ),
  47         TRACE_TO_STRING( BLK_TC_PC )
  48 };
  49 #define N_TRACES (sizeof(traces) / sizeof(struct trace_info))
  50
  51 struct act_info {
  52         __u32 val;
  53         char *string;
  54 };
  55
  56 #define ACT_TO_STRING(f)        {.val = f, .string = #f}
  57 static struct act_info acts[] = {
  58         ACT_TO_STRING( __BLK_TA_QUEUE ),
  59         ACT_TO_STRING( __BLK_TA_QUEUE ),
  60         ACT_TO_STRING( __BLK_TA_BACKMERGE ),
  61         ACT_TO_STRING( __BLK_TA_FRONTMERGE ),
  62         ACT_TO_STRING( __BLK_TA_GETRQ ),
  63         ACT_TO_STRING( __BLK_TA_SLEEPRQ ),
  64         ACT_TO_STRING( __BLK_TA_REQUEUE ),
  65         ACT_TO_STRING( __BLK_TA_ISSUE ),
  66         ACT_TO_STRING( __BLK_TA_COMPLETE ),
  67         ACT_TO_STRING( __BLK_TA_PLUG ),
  68         ACT_TO_STRING( __BLK_TA_UNPLUG_IO ),
  69         ACT_TO_STRING( __BLK_TA_UNPLUG_TIMER ),
  70         ACT_TO_STRING( __BLK_TA_INSERT ),
  71         ACT_TO_STRING( __BLK_TA_SPLIT ),
  72         ACT_TO_STRING( __BLK_TA_BOUNCE ),
  73         ACT_TO_STRING( __BLK_TA_REMAP )
  74 };
  75 #define N_ACTS (sizeof(acts) / sizeof(struct act_info))
  76
  77 static char *act_to_str(__u32 action)
  78 {
  79         static char buf[1024];
  80         int i;
  81         int act = action & 0xffff;
  82         int trace = (action >> BLK_TC_SHIFT) & 0xffff;
  83
  84         if (act <= N_ACTS) {
  85                 sprintf(buf, "%s ", acts[act].string);
  86                 for (i = 0; i < N_TRACES; i++)
  87                         if (trace & (1 << i)) {
  88                                 char buf2[1024];
  89                                 sprintf(buf2, "| %s ", traces[i].string);
  90                                 strcat(buf, buf2);
  91                         }
  92         }
  93         else
  94                 sprintf(buf, "Invalid action=%08x", action);
  95
  96         return buf;
  97 }
  98
  99 static void dump_trace(FILE *ofp, char *prefix, struct blk_io_trace *bit)
 100 {
 101         fprintf(ofp, "    Dump %s\n", prefix);
 102         fprintf(ofp, "        %8s: %08x\n", "magic", bit->magic);
 103         fprintf(ofp, "        %8s: %u\n", "sequence", bit->sequence);
 104         fprintf(ofp, "        %8s: %llu\n", "time", bit->time);
 105         fprintf(ofp, "        %8s: %llu\n", "sector", bit->sector);
 106         fprintf(ofp, "        %8s: %u\n", "bytes", bit->bytes);
 107         fprintf(ofp, "        %8s: %s\n", "action", act_to_str(bit->action));
 108         fprintf(ofp, "        %8s: %u\n", "bytes", bit->bytes);
 109         fprintf(ofp, "        %8s: %u\n", "cpu", bit->cpu);
 110         fprintf(ofp, "        %8s: %u\n", "error", bit->error);
 111         fprintf(ofp, "        %8s: %u\n", "pdu_len", bit->pdu_len);
 112         fprintf(ofp, "        %8s: (%u,%u)\n\n", "device", MAJOR(bit->device),
 113                                                            MINOR(bit->device));
 114 }
 115
 116 static int process(FILE *ofp, char *file, int cpu)
 117 {
 118 #       define SWAP_BITS() do {                                         \
 119                 if (bit_save) {                                         \
 120                         struct blk_io_trace *tmp = bit_save;            \
 121                         bit_save = bit;                                 \
 122                         bit = tmp;                                      \
 123                 }                                                       \
 124                 else {                                                  \
 125                         bit_save = bit;                                 \
 126                         bit = malloc(sizeof(struct blk_io_trace));      \
 127                 }                                                       \
 128         } while (0)
 129
 130 #       define INC_BAD(str) do {                                        \
 131                 nbad++;                                                 \
 132                 fprintf(ofp, "    ----------------\n");                 \
 133                 if (bit_save) dump_trace(ofp,"seq-1",bit_save);         \
 134                 dump_trace(ofp, str, bit);                              \
 135                 SWAP_BITS();                                            \
 136         } while (0)
 137
 138         size_t n;
 139         FILE *ifp;
 140         __u32 save_device = 0, save_sequence = 0;
 141         __u64 save_time = 0;
 142         struct blk_io_trace *bit_save = NULL;
 143         struct blk_io_trace *bit = malloc(sizeof(struct blk_io_trace));
 144         unsigned int ngood = 0;
 145         unsigned int nbad = 0;
 146         unsigned int nbad_trace = 0, nbad_pdu = 0, nbad_cpu = 0;
 147         unsigned int nbad_seq = 0, nbad_dev = 0, nbad_time = 0;
 148
 149         ifp = fopen(file, "r");
 150         while ((n = fread(bit, sizeof(struct blk_io_trace), 1, ifp)) == 1) {
 151                 trace_to_cpu(bit);
 152                 if (verify_trace(bit)) {
 153                         INC_BAD("bad trace");
 154                         continue;
 155                 }
 156
 157                 if (bit->pdu_len) {
 158                         char *pdu_buf;
 159
 160                         pdu_buf = malloc(bit->pdu_len);
 161                         n = fread(pdu_buf, bit->pdu_len, 1, ifp);
 162                         if (n <= 0) {
 163                                 INC_BAD("bad pdu");
 164                                 nbad_seq++;
 165                                 break;
 166                         }
 167                         free(pdu_buf);
 168                 }
 169
 170                 if (bit->cpu != cpu) {
 171                         INC_BAD("bad cpu");
 172                         nbad_cpu++;
 173                         continue;
 174                 }
 175
 176                 if (ngood) {
 177                         if (bit->sequence <= save_sequence) {
 178                                 INC_BAD("bad seq");
 179                                 nbad_seq++;
 180                                 continue;
 181                         }
 182                         else if (bit->time <= save_time) {
 183                                 INC_BAD("time regression");
 184                                 nbad_time++;
 185                                 continue;
 186                         }
 187                         else if (bit->device != save_device) {
 188                                 INC_BAD("bad dev");
 189                                 nbad_dev++;
 190                                 continue;
 191                         }
 192                 }
 193
 194                 save_sequence = bit->sequence;
 195                 save_time = bit->time;
 196                 save_device = bit->device;
 197
 198                 ngood++;
 199                 SWAP_BITS();
 200         }
 201
 202         if (n < 0)
 203                 fprintf(stderr,"%s: fread failed %d/%s\n",
 204                         file, errno, strerror(errno));
 205         fclose(ifp);
 206
 207         fprintf(ofp, "    ---------------------\n");
 208         fprintf(ofp, "    Summary for cpu %d:\n", cpu);
 209         fprintf(ofp, "    %10d valid + %10d invalid (%5.1f%%) processed\n\n",
 210                 ngood, nbad,
 211                 ngood ? 100.0 * (float)ngood / (float)(ngood + nbad) : 0.0);
 212
 213         if (nbad) {
 214                 if (nbad_trace)
 215                         fprintf(ofp, "%8s %d traces\n", "", nbad_trace);
 216                 if (nbad_trace)
 217                         fprintf(ofp, "%8s %d pdu\n", "", nbad_pdu);
 218                 if (nbad_cpu)
 219                         fprintf(ofp, "%8s %d cpu\n", "", nbad_cpu);
 220                 if (nbad_seq)
 221                         fprintf(ofp, "%8s %d seq\n", "", nbad_seq);
 222                 if (nbad_dev)
 223                         fprintf(ofp, "%8s %d dev\n", "", nbad_dev);
 224                 if (nbad_time)
 225                         fprintf(ofp, "%8s %d time\n", "", nbad_time);
 226                 fprintf(ofp,"\n");
 227         }
 228
 229         return nbad;
 230 }
 231
 232 int main(int argc, char *argv[])
 233 {
 234         char *devname;
 235         struct stat st;
 236         int i, cpu, nbad;
 237         FILE *ofp;
 238         char *ofname = malloc(1024);
 239         char *fname = malloc(1024);
 240
 241         if (argc < 2) {
 242                 fprintf(stderr,"FATAL: Need device name(s)\n");
 243                 fprintf(stderr,"Usage: blkrawverify <dev> [<dev>...]\n");
 244                 exit(1);
 245         }
 246
 247         for (i = 1; i < argc; i++) {
 248                 devname = argv[i];
 249                 sprintf(ofname, "%s.verify.out", devname);
 250                 ofp = fopen(ofname, "w");
 251                 if (ofp == NULL) {
 252                         fprintf(stderr,"Failed to open %s (%s), skipping %s\n",
 253                                 ofname, strerror(errno), devname);
 254                         continue;
 255                 }
 256
 257                 fprintf(ofp, "\n---------------\n" );
 258                 fprintf(ofp, "Verifying %s\n", devname);
 259                 printf("Verifying %s\n", devname); fflush(stdout);
 260                 for (cpu = 0; ; cpu++) {
 261                         sprintf(fname, "%s.blktrace.%d", devname, cpu);
 262                         if (stat(fname, &st) < 0)
 263                                 break;
 264                         printf("    CPU %d ", cpu); fflush(stdout);
 265                         nbad = process(ofp, fname, cpu);
 266                         if (nbad)
 267                                 printf("-- %d bad", nbad);
 268                         printf("\n");
 269                 }
 270                 fclose(ofp);
 271         }
 272
 273         return 0;
 274 }