diff options
Diffstat (limited to 'blkrawverify.c')
-rw-r--r-- | blkrawverify.c | 322 |
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; +} |