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-rw-r--r--blkrawverify.c322
1 files changed, 322 insertions, 0 deletions
diff --git a/blkrawverify.c b/blkrawverify.c
new file mode 100644
index 0000000..e669179
--- /dev/null
+++ b/blkrawverify.c
@@ -0,0 +1,322 @@
+/*
+ * block queue tracing application
+ *
+ * Copyright (C) 2006 Alan D. Brunelle <Alan.Brunelle@hp.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+#include "blktrace.h"
+
+struct trace_info {
+ int bit_field;
+ char *string;
+};
+
+int data_is_native = -1;
+
+#define TRACE_TO_STRING(f) {.bit_field = f, .string = #f}
+static struct trace_info traces[] = {
+ TRACE_TO_STRING( BLK_TC_READ ),
+ TRACE_TO_STRING( BLK_TC_WRITE ),
+ TRACE_TO_STRING( BLK_TC_BARRIER ),
+ TRACE_TO_STRING( BLK_TC_SYNC ),
+ TRACE_TO_STRING( BLK_TC_QUEUE ),
+ TRACE_TO_STRING( BLK_TC_REQUEUE ),
+ TRACE_TO_STRING( BLK_TC_ISSUE ),
+ TRACE_TO_STRING( BLK_TC_COMPLETE ),
+ TRACE_TO_STRING( BLK_TC_FS ),
+ TRACE_TO_STRING( BLK_TC_PC ),
+ TRACE_TO_STRING( BLK_TC_AHEAD ),
+ TRACE_TO_STRING( BLK_TC_META ),
+ TRACE_TO_STRING( BLK_TC_DISCARD ),
+};
+#define N_TRACES (sizeof(traces) / sizeof(struct trace_info))
+
+struct act_info {
+ __u32 val;
+ char *string;
+};
+
+#define ACT_TO_STRING(f) {.val = f, .string = #f}
+static struct act_info acts[] = {
+ ACT_TO_STRING( __BLK_TA_QUEUE ),
+ ACT_TO_STRING( __BLK_TA_QUEUE ),
+ ACT_TO_STRING( __BLK_TA_BACKMERGE ),
+ ACT_TO_STRING( __BLK_TA_FRONTMERGE ),
+ ACT_TO_STRING( __BLK_TA_GETRQ ),
+ ACT_TO_STRING( __BLK_TA_SLEEPRQ ),
+ ACT_TO_STRING( __BLK_TA_REQUEUE ),
+ ACT_TO_STRING( __BLK_TA_ISSUE ),
+ ACT_TO_STRING( __BLK_TA_COMPLETE ),
+ ACT_TO_STRING( __BLK_TA_PLUG ),
+ ACT_TO_STRING( __BLK_TA_UNPLUG_IO ),
+ ACT_TO_STRING( __BLK_TA_UNPLUG_TIMER ),
+ ACT_TO_STRING( __BLK_TA_INSERT ),
+ ACT_TO_STRING( __BLK_TA_SPLIT ),
+ ACT_TO_STRING( __BLK_TA_BOUNCE ),
+ ACT_TO_STRING( __BLK_TA_REMAP )
+};
+#define N_ACTS (sizeof(acts) / sizeof(struct act_info))
+
+static char *act_to_str(__u32 action)
+{
+ static char buf[1024];
+ unsigned int i;
+ unsigned int act = action & 0xffff;
+ unsigned int trace = (action >> BLK_TC_SHIFT) & 0xffff;
+
+ if (act <= N_ACTS) {
+ sprintf(buf, "%s ", acts[act].string);
+ for (i = 0; i < N_TRACES; i++)
+ if (trace & (1 << i)) {
+ char buf2[1024];
+ sprintf(buf2, "| %s ", traces[i].string);
+ strcat(buf, buf2);
+ }
+ }
+ else
+ sprintf(buf, "Invalid action=%08x", action);
+
+ return buf;
+}
+
+static void dump_trace(FILE *ofp, char *prefix, struct blk_io_trace *bit)
+{
+ fprintf(ofp, " Dump %s\n", prefix);
+ fprintf(ofp, " %8s: %08x\n", "magic", bit->magic);
+ fprintf(ofp, " %8s: %u\n", "sequence", bit->sequence);
+ fprintf(ofp, " %8s: %llu\n", "time", (unsigned long long) bit->time);
+ fprintf(ofp, " %8s: %llu\n", "sector", (unsigned long long) bit->sector);
+ fprintf(ofp, " %8s: %u\n", "bytes", bit->bytes);
+ fprintf(ofp, " %8s: %s\n", "action", act_to_str(bit->action));
+ fprintf(ofp, " %8s: %u\n", "bytes", bit->bytes);
+ fprintf(ofp, " %8s: %u\n", "cpu", bit->cpu);
+ fprintf(ofp, " %8s: %u\n", "error", bit->error);
+ fprintf(ofp, " %8s: %u\n", "pdu_len", bit->pdu_len);
+ fprintf(ofp, " %8s: (%u,%u)\n\n", "device", MAJOR(bit->device),
+ MINOR(bit->device));
+}
+
+static int process(FILE **fp, char *devname, char *file, unsigned int cpu)
+{
+# define SWAP_BITS() do { \
+ if (bit_save) { \
+ struct blk_io_trace *tmp = bit_save; \
+ bit_save = bit; \
+ bit = tmp; \
+ } \
+ else { \
+ bit_save = bit; \
+ bit = malloc(sizeof(struct blk_io_trace)); \
+ } \
+ } while (0)
+
+# define INC_BAD(str) do { \
+ nbad++; \
+ fprintf(ofp, " ----------------\n"); \
+ if (bit_save) dump_trace(ofp,"seq-1",bit_save); \
+ dump_trace(ofp, str, bit); \
+ SWAP_BITS(); \
+ } while (0)
+
+ size_t n;
+ FILE *ifp, *ofp;
+ __u32 save_device = 0, save_sequence = 0;
+ __u64 save_time = 0;
+ struct blk_io_trace *bit_save = NULL;
+ struct blk_io_trace *bit = malloc(sizeof(struct blk_io_trace));
+ unsigned int ngood = 0;
+ unsigned int nbad = 0;
+ unsigned int nbad_trace = 0, nbad_pdu = 0, nbad_cpu = 0;
+ unsigned int nbad_seq = 0, nbad_dev = 0, nbad_time = 0;
+ char ofname[1024];
+
+ ifp = fopen(file, "r");
+ if (!ifp)
+ return 0;
+
+ sprintf(ofname, "%s.verify.out", devname);
+
+ if (!*fp) {
+ *fp = fopen(ofname, "w");
+ if (*fp == NULL) {
+ fprintf(stderr,"Failed to open %s (%s), skipping\n",
+ ofname, strerror(errno));
+ fclose(ifp);
+ return 0;
+ }
+ fprintf(*fp, "\n---------------\n" );
+ fprintf(*fp, "Verifying %s\n", devname);
+ }
+
+ ofp = *fp;
+ while ((n = fread(bit, sizeof(struct blk_io_trace), 1, ifp)) == 1) {
+ if (ferror(ifp)) {
+ clearerr(ifp);
+ perror("fread");
+ break;
+ }
+ if (data_is_native == -1)
+ check_data_endianness(bit->magic);
+
+ trace_to_cpu(bit);
+
+ if (!CHECK_MAGIC(bit)) {
+ INC_BAD("bad trace");
+ continue;
+ }
+
+ if ((bit->magic & 0xff) != SUPPORTED_VERSION) {
+ fprintf(stderr, "unsupported trace version\n");
+ break;
+ }
+
+ if (bit->pdu_len) {
+ char *pdu_buf;
+
+ pdu_buf = malloc(bit->pdu_len);
+ n = fread(pdu_buf, bit->pdu_len, 1, ifp);
+ if (n == 0) {
+ INC_BAD("bad pdu");
+ nbad_seq++;
+ break;
+ }
+ free(pdu_buf);
+ }
+
+ if (bit->cpu != cpu) {
+ INC_BAD("bad cpu");
+ nbad_cpu++;
+ continue;
+ }
+
+ /*
+ * skip notify traces, they don't have valid sequences
+ */
+ if (bit->action & BLK_TC_ACT(BLK_TC_NOTIFY))
+ continue;
+
+ if (ngood) {
+ if (bit->sequence <= save_sequence) {
+ INC_BAD("bad seq");
+ nbad_seq++;
+ continue;
+ }
+ else if (bit->time <= save_time) {
+ INC_BAD("time regression");
+ nbad_time++;
+ continue;
+ }
+ else if (bit->device != save_device) {
+ INC_BAD("bad dev");
+ nbad_dev++;
+ continue;
+ }
+ }
+
+ save_sequence = bit->sequence;
+ save_time = bit->time;
+ save_device = bit->device;
+
+ ngood++;
+ SWAP_BITS();
+ }
+
+ if (n == 0 && !feof(ifp))
+ fprintf(stderr,"%s: fread failed %d/%s\n",
+ file, errno, strerror(errno));
+ fclose(ifp);
+
+ fprintf(ofp, " ---------------------\n");
+ fprintf(ofp, " Summary for cpu %d:\n", cpu);
+ fprintf(ofp, " %10d valid + %10d invalid (%5.1f%%) processed\n\n",
+ ngood, nbad,
+ ngood ? 100.0 * (float)ngood / (float)(ngood + nbad) : 0.0);
+
+ if (nbad) {
+ if (nbad_trace)
+ fprintf(ofp, "%8s %d traces\n", "", nbad_trace);
+ if (nbad_trace)
+ fprintf(ofp, "%8s %d pdu\n", "", nbad_pdu);
+ if (nbad_cpu)
+ fprintf(ofp, "%8s %d cpu\n", "", nbad_cpu);
+ if (nbad_seq)
+ fprintf(ofp, "%8s %d seq\n", "", nbad_seq);
+ if (nbad_dev)
+ fprintf(ofp, "%8s %d dev\n", "", nbad_dev);
+ if (nbad_time)
+ fprintf(ofp, "%8s %d time\n", "", nbad_time);
+ fprintf(ofp,"\n");
+ }
+
+ return nbad;
+}
+
+int main(int argc, char *argv[])
+{
+ char *devname;
+ struct stat st;
+ int i, cpu, nbad, rval = 0;
+ FILE *ofp;
+ char *ofname = malloc(1024);
+ char *fname = malloc(1024);
+
+ if (argc < 2) {
+ fprintf(stderr,"FATAL: Need device name(s)\n");
+ fprintf(stderr,"Usage: blkrawverify <dev> [<dev>...]\n");
+ exit(1);
+ }
+
+ for (i = 1; i < argc; i++) {
+ devname = argv[i];
+ sprintf(ofname, "%s.verify.out", devname);
+ ofp = NULL;
+
+ printf("Verifying %s\n", devname); fflush(stdout);
+ for (cpu = 0; ; cpu++) {
+ sprintf(fname, "%s.blktrace.%d", devname, cpu);
+ if (stat(fname, &st) < 0) {
+ if (cpu == 0) {
+ fprintf(stderr, "No tracefiles found for %s\n",
+ devname);
+ rval = 1;
+ }
+ break;
+ }
+ printf(" CPU %d ", cpu); fflush(stdout);
+ nbad = process(&ofp, devname, fname, cpu);
+ if (nbad) {
+ printf("-- %d bad", nbad);
+ rval = 1;
+ }
+ printf("\n");
+ }
+ if (ofp) {
+ fclose(ofp);
+ fprintf(stdout, "Wrote output to %s\n", ofname);
+ }
+ }
+
+ return rval;
+}
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