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