2 * Command line utility to exercise the QEMU I/O path.
4 * Copyright (C) 2009 Red Hat, Inc.
5 * Copyright (c) 2003-2005 Silicon Graphics, Inc.
7 * This work is licensed under the terms of the GNU GPL, version 2 or later.
8 * See the COPYING file in the top-level directory.
11 #include <sys/types.h>
17 #include "qemu-common.h"
18 #include "block_int.h"
21 #define VERSION "0.0.1"
23 #define CMD_NOFILE_OK 0x01
26 static BlockDriverState *bs;
31 * Parse the pattern argument to various sub-commands.
33 * Because the pattern is used as an argument to memset it must evaluate
34 * to an unsigned integer that fits into a single byte.
36 static int parse_pattern(const char *arg)
41 pattern = strtol(arg, &endptr, 0);
42 if (pattern < 0 || pattern > UCHAR_MAX || *endptr != '\0') {
43 printf("%s is not a valid pattern byte\n", arg);
51 * Memory allocation helpers.
53 * Make sure memory is aligned by default, or purposefully misaligned if
54 * that is specified on the command line.
57 #define MISALIGN_OFFSET 16
58 static void *qemu_io_alloc(size_t len, int pattern)
63 len += MISALIGN_OFFSET;
64 buf = qemu_memalign(512, len);
65 memset(buf, pattern, len);
67 buf += MISALIGN_OFFSET;
71 static void qemu_io_free(void *p)
79 dump_buffer(const void *buffer, int64_t offset, int len)
84 for (i = 0, p = buffer; i < len; i += 16) {
87 printf("%08llx: ", (unsigned long long)offset + i);
88 for (j = 0; j < 16 && i + j < len; j++, p++)
91 for (j = 0; j < 16 && i + j < len; j++, s++) {
102 print_report(const char *op, struct timeval *t, int64_t offset,
103 int count, int total, int cnt, int Cflag)
105 char s1[64], s2[64], ts[64];
107 timestr(t, ts, sizeof(ts), Cflag ? VERBOSE_FIXED_TIME : 0);
109 cvtstr((double)total, s1, sizeof(s1));
110 cvtstr(tdiv((double)total, *t), s2, sizeof(s2));
111 printf("%s %d/%d bytes at offset %lld\n",
112 op, total, count, (long long)offset);
113 printf("%s, %d ops; %s (%s/sec and %.4f ops/sec)\n",
114 s1, cnt, ts, s2, tdiv((double)cnt, *t));
115 } else {/* bytes,ops,time,bytes/sec,ops/sec */
116 printf("%d,%d,%s,%.3f,%.3f\n",
118 tdiv((double)total, *t),
119 tdiv((double)cnt, *t));
124 * Parse multiple length statements for vectored I/O, and construct an I/O
125 * vector matching it.
128 create_iovec(QEMUIOVector *qiov, char **argv, int nr_iov, int pattern)
130 size_t *sizes = calloc(nr_iov, sizeof(size_t));
136 for (i = 0; i < nr_iov; i++) {
142 printf("non-numeric length argument -- %s\n", arg);
146 /* should be SIZE_T_MAX, but that doesn't exist */
147 if (len > UINT_MAX) {
148 printf("too large length argument -- %s\n", arg);
153 printf("length argument %lld is not sector aligned\n",
162 qemu_iovec_init(qiov, nr_iov);
164 buf = p = qemu_io_alloc(count, pattern);
166 for (i = 0; i < nr_iov; i++) {
167 qemu_iovec_add(qiov, p, sizes[i]);
176 static int do_read(char *buf, int64_t offset, int count, int *total)
180 ret = bdrv_read(bs, offset >> 9, (uint8_t *)buf, count >> 9);
187 static int do_write(char *buf, int64_t offset, int count, int *total)
191 ret = bdrv_write(bs, offset >> 9, (uint8_t *)buf, count >> 9);
198 static int do_pread(char *buf, int64_t offset, int count, int *total)
200 *total = bdrv_pread(bs, offset, (uint8_t *)buf, count);
206 static int do_pwrite(char *buf, int64_t offset, int count, int *total)
208 *total = bdrv_pwrite(bs, offset, (uint8_t *)buf, count);
214 static int do_load_vmstate(char *buf, int64_t offset, int count, int *total)
216 *total = bdrv_load_vmstate(bs, (uint8_t *)buf, offset, count);
222 static int do_save_vmstate(char *buf, int64_t offset, int count, int *total)
224 *total = bdrv_save_vmstate(bs, (uint8_t *)buf, offset, count);
230 #define NOT_DONE 0x7fffffff
231 static void aio_rw_done(void *opaque, int ret)
233 *(int *)opaque = ret;
236 static int do_aio_readv(QEMUIOVector *qiov, int64_t offset, int *total)
238 BlockDriverAIOCB *acb;
239 int async_ret = NOT_DONE;
241 acb = bdrv_aio_readv(bs, offset >> 9, qiov, qiov->size >> 9,
242 aio_rw_done, &async_ret);
246 while (async_ret == NOT_DONE)
250 return async_ret < 0 ? async_ret : 1;
253 static int do_aio_writev(QEMUIOVector *qiov, int64_t offset, int *total)
255 BlockDriverAIOCB *acb;
256 int async_ret = NOT_DONE;
258 acb = bdrv_aio_writev(bs, offset >> 9, qiov, qiov->size >> 9,
259 aio_rw_done, &async_ret);
263 while (async_ret == NOT_DONE)
267 return async_ret < 0 ? async_ret : 1;
276 " reads a range of bytes from the given offset\n"
279 " 'read -v 512 1k' - dumps 1 kilobyte read from 512 bytes into the file\n"
281 " Reads a segment of the currently open file, optionally dumping it to the\n"
282 " standard output stream (with -v option) for subsequent inspection.\n"
283 " -b, -- read from the VM state rather than the virtual disk\n"
284 " -C, -- report statistics in a machine parsable format\n"
285 " -l, -- length for pattern verification (only with -P)\n"
286 " -p, -- use bdrv_pread to read the file\n"
287 " -P, -- use a pattern to verify read data\n"
288 " -q, -- quite mode, do not show I/O statistics\n"
289 " -s, -- start offset for pattern verification (only with -P)\n"
290 " -v, -- dump buffer to standard output\n"
294 static int read_f(int argc, char **argv);
296 static const cmdinfo_t read_cmd = {
302 .args = "[-abCpqv] [-P pattern [-s off] [-l len]] off len",
303 .oneline = "reads a number of bytes at a specified offset",
308 read_f(int argc, char **argv)
310 struct timeval t1, t2;
311 int Cflag = 0, pflag = 0, qflag = 0, vflag = 0;
312 int Pflag = 0, sflag = 0, lflag = 0, bflag = 0;
317 /* Some compilers get confused and warn if this is not initialized. */
319 int pattern = 0, pattern_offset = 0, pattern_count = 0;
321 while ((c = getopt(argc, argv, "bCl:pP:qs:v")) != EOF) {
331 pattern_count = cvtnum(optarg);
332 if (pattern_count < 0) {
333 printf("non-numeric length argument -- %s\n", optarg);
342 pattern = parse_pattern(optarg);
351 pattern_offset = cvtnum(optarg);
352 if (pattern_offset < 0) {
353 printf("non-numeric length argument -- %s\n", optarg);
361 return command_usage(&read_cmd);
365 if (optind != argc - 2)
366 return command_usage(&read_cmd);
368 if (bflag && pflag) {
369 printf("-b and -p cannot be specified at the same time\n");
373 offset = cvtnum(argv[optind]);
375 printf("non-numeric length argument -- %s\n", argv[optind]);
380 count = cvtnum(argv[optind]);
382 printf("non-numeric length argument -- %s\n", argv[optind]);
386 if (!Pflag && (lflag || sflag)) {
387 return command_usage(&read_cmd);
391 pattern_count = count - pattern_offset;
394 if ((pattern_count < 0) || (pattern_count + pattern_offset > count)) {
395 printf("pattern verfication range exceeds end of read data\n");
400 if (offset & 0x1ff) {
401 printf("offset %lld is not sector aligned\n",
406 printf("count %d is not sector aligned\n",
412 buf = qemu_io_alloc(count, 0xab);
414 gettimeofday(&t1, NULL);
416 cnt = do_pread(buf, offset, count, &total);
418 cnt = do_load_vmstate(buf, offset, count, &total);
420 cnt = do_read(buf, offset, count, &total);
421 gettimeofday(&t2, NULL);
424 printf("read failed: %s\n", strerror(-cnt));
429 void* cmp_buf = malloc(pattern_count);
430 memset(cmp_buf, pattern, pattern_count);
431 if (memcmp(buf + pattern_offset, cmp_buf, pattern_count)) {
432 printf("Pattern verification failed at offset %lld, "
434 (long long) offset + pattern_offset, pattern_count);
443 dump_buffer(buf, offset, count);
445 /* Finally, report back -- -C gives a parsable format */
447 print_report("read", &t2, offset, count, total, cnt, Cflag);
460 " reads a range of bytes from the given offset into multiple buffers\n"
463 " 'readv -v 512 1k 1k ' - dumps 2 kilobytes read from 512 bytes into the file\n"
465 " Reads a segment of the currently open file, optionally dumping it to the\n"
466 " standard output stream (with -v option) for subsequent inspection.\n"
467 " Uses multiple iovec buffers if more than one byte range is specified.\n"
468 " -C, -- report statistics in a machine parsable format\n"
469 " -P, -- use a pattern to verify read data\n"
470 " -v, -- dump buffer to standard output\n"
471 " -q, -- quite mode, do not show I/O statistics\n"
475 static int readv_f(int argc, char **argv);
477 static const cmdinfo_t readv_cmd = {
482 .args = "[-Cqv] [-P pattern ] off len [len..]",
483 .oneline = "reads a number of bytes at a specified offset",
488 readv_f(int argc, char **argv)
490 struct timeval t1, t2;
491 int Cflag = 0, qflag = 0, vflag = 0;
495 /* Some compilers get confused and warn if this is not initialized. */
502 while ((c = getopt(argc, argv, "CP:qv")) != EOF) {
509 pattern = parse_pattern(optarg);
520 return command_usage(&readv_cmd);
524 if (optind > argc - 2)
525 return command_usage(&readv_cmd);
528 offset = cvtnum(argv[optind]);
530 printf("non-numeric length argument -- %s\n", argv[optind]);
535 if (offset & 0x1ff) {
536 printf("offset %lld is not sector aligned\n",
541 nr_iov = argc - optind;
542 buf = create_iovec(&qiov, &argv[optind], nr_iov, 0xab);
544 gettimeofday(&t1, NULL);
545 cnt = do_aio_readv(&qiov, offset, &total);
546 gettimeofday(&t2, NULL);
549 printf("readv failed: %s\n", strerror(-cnt));
554 void* cmp_buf = malloc(qiov.size);
555 memset(cmp_buf, pattern, qiov.size);
556 if (memcmp(buf, cmp_buf, qiov.size)) {
557 printf("Pattern verification failed at offset %lld, "
559 (long long) offset, qiov.size);
568 dump_buffer(buf, offset, qiov.size);
570 /* Finally, report back -- -C gives a parsable format */
572 print_report("read", &t2, offset, qiov.size, total, cnt, Cflag);
584 " writes a range of bytes from the given offset\n"
587 " 'write 512 1k' - writes 1 kilobyte at 512 bytes into the open file\n"
589 " Writes into a segment of the currently open file, using a buffer\n"
590 " filled with a set pattern (0xcdcdcdcd).\n"
591 " -b, -- write to the VM state rather than the virtual disk\n"
592 " -p, -- use bdrv_pwrite to write the file\n"
593 " -P, -- use different pattern to fill file\n"
594 " -C, -- report statistics in a machine parsable format\n"
595 " -q, -- quite mode, do not show I/O statistics\n"
599 static int write_f(int argc, char **argv);
601 static const cmdinfo_t write_cmd = {
607 .args = "[-abCpq] [-P pattern ] off len",
608 .oneline = "writes a number of bytes at a specified offset",
613 write_f(int argc, char **argv)
615 struct timeval t1, t2;
616 int Cflag = 0, pflag = 0, qflag = 0, bflag = 0;
621 /* Some compilers get confused and warn if this is not initialized. */
625 while ((c = getopt(argc, argv, "bCpP:q")) != EOF) {
637 pattern = parse_pattern(optarg);
645 return command_usage(&write_cmd);
649 if (optind != argc - 2)
650 return command_usage(&write_cmd);
652 if (bflag && pflag) {
653 printf("-b and -p cannot be specified at the same time\n");
657 offset = cvtnum(argv[optind]);
659 printf("non-numeric length argument -- %s\n", argv[optind]);
664 count = cvtnum(argv[optind]);
666 printf("non-numeric length argument -- %s\n", argv[optind]);
671 if (offset & 0x1ff) {
672 printf("offset %lld is not sector aligned\n",
678 printf("count %d is not sector aligned\n",
684 buf = qemu_io_alloc(count, pattern);
686 gettimeofday(&t1, NULL);
688 cnt = do_pwrite(buf, offset, count, &total);
690 cnt = do_save_vmstate(buf, offset, count, &total);
692 cnt = do_write(buf, offset, count, &total);
693 gettimeofday(&t2, NULL);
696 printf("write failed: %s\n", strerror(-cnt));
703 /* Finally, report back -- -C gives a parsable format */
705 print_report("wrote", &t2, offset, count, total, cnt, Cflag);
718 " writes a range of bytes from the given offset source from multiple buffers\n"
721 " 'write 512 1k 1k' - writes 2 kilobytes at 512 bytes into the open file\n"
723 " Writes into a segment of the currently open file, using a buffer\n"
724 " filled with a set pattern (0xcdcdcdcd).\n"
725 " -P, -- use different pattern to fill file\n"
726 " -C, -- report statistics in a machine parsable format\n"
727 " -q, -- quite mode, do not show I/O statistics\n"
731 static int writev_f(int argc, char **argv);
733 static const cmdinfo_t writev_cmd = {
738 .args = "[-Cq] [-P pattern ] off len [len..]",
739 .oneline = "writes a number of bytes at a specified offset",
744 writev_f(int argc, char **argv)
746 struct timeval t1, t2;
747 int Cflag = 0, qflag = 0;
751 /* Some compilers get confused and warn if this is not initialized. */
757 while ((c = getopt(argc, argv, "CqP:")) != EOF) {
766 pattern = parse_pattern(optarg);
771 return command_usage(&writev_cmd);
775 if (optind > argc - 2)
776 return command_usage(&writev_cmd);
778 offset = cvtnum(argv[optind]);
780 printf("non-numeric length argument -- %s\n", argv[optind]);
785 if (offset & 0x1ff) {
786 printf("offset %lld is not sector aligned\n",
791 nr_iov = argc - optind;
792 buf = create_iovec(&qiov, &argv[optind], nr_iov, pattern);
794 gettimeofday(&t1, NULL);
795 cnt = do_aio_writev(&qiov, offset, &total);
796 gettimeofday(&t2, NULL);
799 printf("writev failed: %s\n", strerror(-cnt));
806 /* Finally, report back -- -C gives a parsable format */
808 print_report("wrote", &t2, offset, qiov.size, total, cnt, Cflag);
827 aio_write_done(void *opaque, int ret)
829 struct aio_ctx *ctx = opaque;
832 gettimeofday(&t2, NULL);
836 printf("aio_write failed: %s\n", strerror(-ret));
844 /* Finally, report back -- -C gives a parsable format */
845 t2 = tsub(t2, ctx->t1);
846 print_report("wrote", &t2, ctx->offset, ctx->qiov.size,
847 ctx->qiov.size, 1, ctx->Cflag);
849 qemu_io_free(ctx->buf);
854 aio_read_done(void *opaque, int ret)
856 struct aio_ctx *ctx = opaque;
859 gettimeofday(&t2, NULL);
862 printf("readv failed: %s\n", strerror(-ret));
867 void *cmp_buf = malloc(ctx->qiov.size);
869 memset(cmp_buf, ctx->pattern, ctx->qiov.size);
870 if (memcmp(ctx->buf, cmp_buf, ctx->qiov.size)) {
871 printf("Pattern verification failed at offset %lld, "
873 (long long) ctx->offset, ctx->qiov.size);
883 dump_buffer(ctx->buf, ctx->offset, ctx->qiov.size);
886 /* Finally, report back -- -C gives a parsable format */
887 t2 = tsub(t2, ctx->t1);
888 print_report("read", &t2, ctx->offset, ctx->qiov.size,
889 ctx->qiov.size, 1, ctx->Cflag);
891 qemu_io_free(ctx->buf);
900 " asynchronously reads a range of bytes from the given offset\n"
903 " 'aio_read -v 512 1k 1k ' - dumps 2 kilobytes read from 512 bytes into the file\n"
905 " Reads a segment of the currently open file, optionally dumping it to the\n"
906 " standard output stream (with -v option) for subsequent inspection.\n"
907 " The read is performed asynchronously and should the aio_flush command \n"
908 " should be used to ensure all outstanding aio requests have been completed\n"
909 " -C, -- report statistics in a machine parsable format\n"
910 " -P, -- use a pattern to verify read data\n"
911 " -v, -- dump buffer to standard output\n"
912 " -q, -- quite mode, do not show I/O statistics\n"
916 static int aio_read_f(int argc, char **argv);
918 static const cmdinfo_t aio_read_cmd = {
923 .args = "[-Cqv] [-P pattern ] off len [len..]",
924 .oneline = "asynchronously reads a number of bytes",
925 .help = aio_read_help,
929 aio_read_f(int argc, char **argv)
932 struct aio_ctx *ctx = calloc(1, sizeof(struct aio_ctx));
933 BlockDriverAIOCB *acb;
935 while ((c = getopt(argc, argv, "CP:qv")) != EOF) {
942 ctx->pattern = parse_pattern(optarg);
943 if (ctx->pattern < 0)
954 return command_usage(&aio_read_cmd);
958 if (optind > argc - 2) {
960 return command_usage(&aio_read_cmd);
963 ctx->offset = cvtnum(argv[optind]);
964 if (ctx->offset < 0) {
965 printf("non-numeric length argument -- %s\n", argv[optind]);
971 if (ctx->offset & 0x1ff) {
972 printf("offset %lld is not sector aligned\n",
973 (long long)ctx->offset);
978 nr_iov = argc - optind;
979 ctx->buf = create_iovec(&ctx->qiov, &argv[optind], nr_iov, 0xab);
981 gettimeofday(&ctx->t1, NULL);
982 acb = bdrv_aio_readv(bs, ctx->offset >> 9, &ctx->qiov,
983 ctx->qiov.size >> 9, aio_read_done, ctx);
998 " asynchronously writes a range of bytes from the given offset source \n"
999 " from multiple buffers\n"
1002 " 'aio_write 512 1k 1k' - writes 2 kilobytes at 512 bytes into the open file\n"
1004 " Writes into a segment of the currently open file, using a buffer\n"
1005 " filled with a set pattern (0xcdcdcdcd).\n"
1006 " The write is performed asynchronously and should the aio_flush command \n"
1007 " should be used to ensure all outstanding aio requests have been completed\n"
1008 " -P, -- use different pattern to fill file\n"
1009 " -C, -- report statistics in a machine parsable format\n"
1010 " -q, -- quite mode, do not show I/O statistics\n"
1014 static int aio_write_f(int argc, char **argv);
1016 static const cmdinfo_t aio_write_cmd = {
1017 .name = "aio_write",
1018 .cfunc = aio_write_f,
1021 .args = "[-Cq] [-P pattern ] off len [len..]",
1022 .oneline = "asynchronously writes a number of bytes",
1023 .help = aio_write_help,
1027 aio_write_f(int argc, char **argv)
1031 struct aio_ctx *ctx = calloc(1, sizeof(struct aio_ctx));
1032 BlockDriverAIOCB *acb;
1034 while ((c = getopt(argc, argv, "CqP:")) != EOF) {
1043 pattern = parse_pattern(optarg);
1049 return command_usage(&aio_write_cmd);
1053 if (optind > argc - 2) {
1055 return command_usage(&aio_write_cmd);
1058 ctx->offset = cvtnum(argv[optind]);
1059 if (ctx->offset < 0) {
1060 printf("non-numeric length argument -- %s\n", argv[optind]);
1066 if (ctx->offset & 0x1ff) {
1067 printf("offset %lld is not sector aligned\n",
1068 (long long)ctx->offset);
1073 nr_iov = argc - optind;
1074 ctx->buf = create_iovec(&ctx->qiov, &argv[optind], nr_iov, pattern);
1076 gettimeofday(&ctx->t1, NULL);
1077 acb = bdrv_aio_writev(bs, ctx->offset >> 9, &ctx->qiov,
1078 ctx->qiov.size >> 9, aio_write_done, ctx);
1089 aio_flush_f(int argc, char **argv)
1095 static const cmdinfo_t aio_flush_cmd = {
1096 .name = "aio_flush",
1097 .cfunc = aio_flush_f,
1098 .oneline = "completes all outstanding aio requets"
1102 flush_f(int argc, char **argv)
1108 static const cmdinfo_t flush_cmd = {
1112 .oneline = "flush all in-core file state to disk",
1116 truncate_f(int argc, char **argv)
1121 offset = cvtnum(argv[1]);
1123 printf("non-numeric truncate argument -- %s\n", argv[1]);
1127 ret = bdrv_truncate(bs, offset);
1129 printf("truncate: %s", strerror(ret));
1136 static const cmdinfo_t truncate_cmd = {
1139 .cfunc = truncate_f,
1143 .oneline = "truncates the current file at the given offset",
1147 length_f(int argc, char **argv)
1152 size = bdrv_getlength(bs);
1154 printf("getlength: %s", strerror(size));
1158 cvtstr(size, s1, sizeof(s1));
1164 static const cmdinfo_t length_cmd = {
1168 .oneline = "gets the length of the current file",
1173 info_f(int argc, char **argv)
1175 BlockDriverInfo bdi;
1176 char s1[64], s2[64];
1179 if (bs->drv && bs->drv->format_name)
1180 printf("format name: %s\n", bs->drv->format_name);
1181 if (bs->drv && bs->drv->protocol_name)
1182 printf("format name: %s\n", bs->drv->protocol_name);
1184 ret = bdrv_get_info(bs, &bdi);
1188 cvtstr(bdi.cluster_size, s1, sizeof(s1));
1189 cvtstr(bdi.vm_state_offset, s2, sizeof(s2));
1191 printf("cluster size: %s\n", s1);
1192 printf("vm state offset: %s\n", s2);
1199 static const cmdinfo_t info_cmd = {
1203 .oneline = "prints information about the current file",
1207 alloc_f(int argc, char **argv)
1210 int nb_sectors, remaining;
1215 offset = cvtnum(argv[1]);
1216 if (offset & 0x1ff) {
1217 printf("offset %lld is not sector aligned\n",
1223 nb_sectors = cvtnum(argv[2]);
1227 remaining = nb_sectors;
1230 ret = bdrv_is_allocated(bs, offset >> 9, nb_sectors, &num);
1237 cvtstr(offset, s1, sizeof(s1));
1239 if (nb_sectors == 1)
1240 printf("sector allocated at offset %s\n", s1);
1242 printf("%d/%d sectors allocated at offset %s\n",
1243 sum_alloc, nb_sectors, s1);
1247 static const cmdinfo_t alloc_cmd = {
1253 .args = "off [sectors]",
1254 .oneline = "checks if a sector is present in the file",
1258 close_f(int argc, char **argv)
1265 static const cmdinfo_t close_cmd = {
1269 .oneline = "close the current open file",
1272 static int openfile(char *name, int flags, int growable)
1275 fprintf(stderr, "file open already, try 'help close'\n");
1279 bs = bdrv_new("hda");
1284 flags |= BDRV_O_FILE;
1287 if (bdrv_open(bs, name, flags) == -1) {
1288 fprintf(stderr, "%s: can't open device %s\n", progname, name);
1304 " opens a new file in the requested mode\n"
1307 " 'open -Cn /tmp/data' - creates/opens data file read-write and uncached\n"
1309 " Opens a file for subsequent use by all of the other qemu-io commands.\n"
1310 " -C, -- create new file if it doesn't exist\n"
1311 " -r, -- open file read-only\n"
1312 " -s, -- use snapshot file\n"
1313 " -n, -- disable host cache\n"
1314 " -g, -- allow file to grow (only applies to protocols)"
1318 static int open_f(int argc, char **argv);
1320 static const cmdinfo_t open_cmd = {
1326 .flags = CMD_NOFILE_OK,
1327 .args = "[-Crsn] [path]",
1328 .oneline = "open the file specified by path",
1333 open_f(int argc, char **argv)
1340 while ((c = getopt(argc, argv, "snCrg")) != EOF) {
1343 flags |= BDRV_O_SNAPSHOT;
1346 flags |= BDRV_O_NOCACHE;
1349 flags |= BDRV_O_CREAT;
1358 return command_usage(&open_cmd);
1363 flags |= BDRV_O_RDONLY;
1365 flags |= BDRV_O_RDWR;
1367 if (optind != argc - 1)
1368 return command_usage(&open_cmd);
1370 return openfile(argv[optind], flags, growable);
1377 /* only one device allowed so far */
1385 const cmdinfo_t *ct)
1387 if (ct->flags & CMD_FLAG_GLOBAL)
1389 if (!(ct->flags & CMD_NOFILE_OK) && !bs) {
1390 fprintf(stderr, "no file open, try 'help open'\n");
1396 static void usage(const char *name)
1399 "Usage: %s [-h] [-V] [-Crsnm] [-c cmd] ... [file]\n"
1400 "QEMU Disk exerciser\n"
1402 " -C, --create create new file if it doesn't exist\n"
1403 " -c, --cmd command to execute\n"
1404 " -r, --read-only export read-only\n"
1405 " -s, --snapshot use snapshot file\n"
1406 " -n, --nocache disable host cache\n"
1407 " -g, --growable allow file to grow (only applies to protocols)\n"
1408 " -m, --misalign misalign allocations for O_DIRECT\n"
1409 " -k, --native-aio use kernel AIO implementation (on Linux only)\n"
1410 " -h, --help display this help and exit\n"
1411 " -V, --version output version information and exit\n"
1417 int main(int argc, char **argv)
1421 const char *sopt = "hVc:Crsnmgk";
1422 const struct option lopt[] = {
1423 { "help", 0, NULL, 'h' },
1424 { "version", 0, NULL, 'V' },
1425 { "offset", 1, NULL, 'o' },
1426 { "cmd", 1, NULL, 'c' },
1427 { "create", 0, NULL, 'C' },
1428 { "read-only", 0, NULL, 'r' },
1429 { "snapshot", 0, NULL, 's' },
1430 { "nocache", 0, NULL, 'n' },
1431 { "misalign", 0, NULL, 'm' },
1432 { "growable", 0, NULL, 'g' },
1433 { "native-aio", 0, NULL, 'k' },
1434 { NULL, 0, NULL, 0 }
1440 progname = basename(argv[0]);
1442 while ((c = getopt_long(argc, argv, sopt, lopt, &opt_index)) != -1) {
1445 flags |= BDRV_O_SNAPSHOT;
1448 flags |= BDRV_O_NOCACHE;
1451 add_user_command(optarg);
1454 flags |= BDRV_O_CREAT;
1466 flags |= BDRV_O_NATIVE_AIO;
1469 printf("%s version %s\n", progname, VERSION);
1480 if ((argc - optind) > 1) {
1487 /* initialize commands */
1490 add_command(&open_cmd);
1491 add_command(&close_cmd);
1492 add_command(&read_cmd);
1493 add_command(&readv_cmd);
1494 add_command(&write_cmd);
1495 add_command(&writev_cmd);
1496 add_command(&aio_read_cmd);
1497 add_command(&aio_write_cmd);
1498 add_command(&aio_flush_cmd);
1499 add_command(&flush_cmd);
1500 add_command(&truncate_cmd);
1501 add_command(&length_cmd);
1502 add_command(&info_cmd);
1503 add_command(&alloc_cmd);
1505 add_args_command(init_args_command);
1506 add_check_command(init_check_command);
1508 /* open the device */
1510 flags |= BDRV_O_RDONLY;
1512 flags |= BDRV_O_RDWR;
1514 if ((argc - optind) == 1)
1515 openfile(argv[optind], flags, growable);
1519 * Make sure all outstanding requests get flushed the program exits.