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;
65 buf = qemu_blockalign(bs, len);
66 memset(buf, pattern, len);
68 buf += MISALIGN_OFFSET;
73 static void qemu_io_free(void *p)
81 static void dump_buffer(const void *buffer, int64_t offset, int len)
86 for (i = 0, p = buffer; i < len; i += 16) {
89 printf("%08" PRIx64 ": ", offset + i);
90 for (j = 0; j < 16 && i + j < len; j++, p++) {
94 for (j = 0; j < 16 && i + j < len; j++, s++) {
105 static void print_report(const char *op, struct timeval *t, int64_t offset,
106 int count, int total, int cnt, int Cflag)
108 char s1[64], s2[64], ts[64];
110 timestr(t, ts, sizeof(ts), Cflag ? VERBOSE_FIXED_TIME : 0);
112 cvtstr((double)total, s1, sizeof(s1));
113 cvtstr(tdiv((double)total, *t), s2, sizeof(s2));
114 printf("%s %d/%d bytes at offset %" PRId64 "\n",
115 op, total, count, offset);
116 printf("%s, %d ops; %s (%s/sec and %.4f ops/sec)\n",
117 s1, cnt, ts, s2, tdiv((double)cnt, *t));
118 } else {/* bytes,ops,time,bytes/sec,ops/sec */
119 printf("%d,%d,%s,%.3f,%.3f\n",
121 tdiv((double)total, *t),
122 tdiv((double)cnt, *t));
127 * Parse multiple length statements for vectored I/O, and construct an I/O
128 * vector matching it.
131 create_iovec(QEMUIOVector *qiov, char **argv, int nr_iov, int pattern)
133 size_t *sizes = calloc(nr_iov, sizeof(size_t));
139 for (i = 0; i < nr_iov; i++) {
145 printf("non-numeric length argument -- %s\n", arg);
149 /* should be SIZE_T_MAX, but that doesn't exist */
151 printf("too large length argument -- %s\n", arg);
156 printf("length argument %" PRId64
157 " is not sector aligned\n", len);
165 qemu_iovec_init(qiov, nr_iov);
167 buf = p = qemu_io_alloc(count, pattern);
169 for (i = 0; i < nr_iov; i++) {
170 qemu_iovec_add(qiov, p, sizes[i]);
179 static int do_read(char *buf, int64_t offset, int count, int *total)
183 ret = bdrv_read(bs, offset >> 9, (uint8_t *)buf, count >> 9);
191 static int do_write(char *buf, int64_t offset, int count, int *total)
195 ret = bdrv_write(bs, offset >> 9, (uint8_t *)buf, count >> 9);
203 static int do_pread(char *buf, int64_t offset, int count, int *total)
205 *total = bdrv_pread(bs, offset, (uint8_t *)buf, count);
212 static int do_pwrite(char *buf, int64_t offset, int count, int *total)
214 *total = bdrv_pwrite(bs, offset, (uint8_t *)buf, count);
221 static int do_load_vmstate(char *buf, int64_t offset, int count, int *total)
223 *total = bdrv_load_vmstate(bs, (uint8_t *)buf, offset, count);
230 static int do_save_vmstate(char *buf, int64_t offset, int count, int *total)
232 *total = bdrv_save_vmstate(bs, (uint8_t *)buf, offset, count);
239 #define NOT_DONE 0x7fffffff
240 static void aio_rw_done(void *opaque, int ret)
242 *(int *)opaque = ret;
245 static int do_aio_readv(QEMUIOVector *qiov, int64_t offset, int *total)
247 int async_ret = NOT_DONE;
249 bdrv_aio_readv(bs, offset >> 9, qiov, qiov->size >> 9,
250 aio_rw_done, &async_ret);
251 while (async_ret == NOT_DONE) {
256 return async_ret < 0 ? async_ret : 1;
259 static int do_aio_writev(QEMUIOVector *qiov, int64_t offset, int *total)
261 int async_ret = NOT_DONE;
263 bdrv_aio_writev(bs, offset >> 9, qiov, qiov->size >> 9,
264 aio_rw_done, &async_ret);
265 while (async_ret == NOT_DONE) {
270 return async_ret < 0 ? async_ret : 1;
273 struct multiwrite_async_ret {
278 static void multiwrite_cb(void *opaque, int ret)
280 struct multiwrite_async_ret *async_ret = opaque;
282 async_ret->num_done++;
284 async_ret->error = ret;
288 static int do_aio_multiwrite(BlockRequest* reqs, int num_reqs, int *total)
291 struct multiwrite_async_ret async_ret = {
297 for (i = 0; i < num_reqs; i++) {
298 reqs[i].cb = multiwrite_cb;
299 reqs[i].opaque = &async_ret;
300 *total += reqs[i].qiov->size;
303 ret = bdrv_aio_multiwrite(bs, reqs, num_reqs);
308 while (async_ret.num_done < num_reqs) {
312 return async_ret.error < 0 ? async_ret.error : 1;
315 static void read_help(void)
319 " reads a range of bytes from the given offset\n"
322 " 'read -v 512 1k' - dumps 1 kilobyte read from 512 bytes into the file\n"
324 " Reads a segment of the currently open file, optionally dumping it to the\n"
325 " standard output stream (with -v option) for subsequent inspection.\n"
326 " -b, -- read from the VM state rather than the virtual disk\n"
327 " -C, -- report statistics in a machine parsable format\n"
328 " -l, -- length for pattern verification (only with -P)\n"
329 " -p, -- use bdrv_pread to read the file\n"
330 " -P, -- use a pattern to verify read data\n"
331 " -q, -- quiet mode, do not show I/O statistics\n"
332 " -s, -- start offset for pattern verification (only with -P)\n"
333 " -v, -- dump buffer to standard output\n"
337 static int read_f(int argc, char **argv);
339 static const cmdinfo_t read_cmd = {
345 .args = "[-abCpqv] [-P pattern [-s off] [-l len]] off len",
346 .oneline = "reads a number of bytes at a specified offset",
350 static int read_f(int argc, char **argv)
352 struct timeval t1, t2;
353 int Cflag = 0, pflag = 0, qflag = 0, vflag = 0;
354 int Pflag = 0, sflag = 0, lflag = 0, bflag = 0;
359 /* Some compilers get confused and warn if this is not initialized. */
361 int pattern = 0, pattern_offset = 0, pattern_count = 0;
363 while ((c = getopt(argc, argv, "bCl:pP:qs:v")) != EOF) {
373 pattern_count = cvtnum(optarg);
374 if (pattern_count < 0) {
375 printf("non-numeric length argument -- %s\n", optarg);
384 pattern = parse_pattern(optarg);
394 pattern_offset = cvtnum(optarg);
395 if (pattern_offset < 0) {
396 printf("non-numeric length argument -- %s\n", optarg);
404 return command_usage(&read_cmd);
408 if (optind != argc - 2) {
409 return command_usage(&read_cmd);
412 if (bflag && pflag) {
413 printf("-b and -p cannot be specified at the same time\n");
417 offset = cvtnum(argv[optind]);
419 printf("non-numeric length argument -- %s\n", argv[optind]);
424 count = cvtnum(argv[optind]);
426 printf("non-numeric length argument -- %s\n", argv[optind]);
430 if (!Pflag && (lflag || sflag)) {
431 return command_usage(&read_cmd);
435 pattern_count = count - pattern_offset;
438 if ((pattern_count < 0) || (pattern_count + pattern_offset > count)) {
439 printf("pattern verification range exceeds end of read data\n");
444 if (offset & 0x1ff) {
445 printf("offset %" PRId64 " is not sector aligned\n",
450 printf("count %d is not sector aligned\n",
456 buf = qemu_io_alloc(count, 0xab);
458 gettimeofday(&t1, NULL);
460 cnt = do_pread(buf, offset, count, &total);
462 cnt = do_load_vmstate(buf, offset, count, &total);
464 cnt = do_read(buf, offset, count, &total);
466 gettimeofday(&t2, NULL);
469 printf("read failed: %s\n", strerror(-cnt));
474 void *cmp_buf = malloc(pattern_count);
475 memset(cmp_buf, pattern, pattern_count);
476 if (memcmp(buf + pattern_offset, cmp_buf, pattern_count)) {
477 printf("Pattern verification failed at offset %"
478 PRId64 ", %d bytes\n",
479 offset + pattern_offset, pattern_count);
489 dump_buffer(buf, offset, count);
492 /* Finally, report back -- -C gives a parsable format */
494 print_report("read", &t2, offset, count, total, cnt, Cflag);
502 static void readv_help(void)
506 " reads a range of bytes from the given offset into multiple buffers\n"
509 " 'readv -v 512 1k 1k ' - dumps 2 kilobytes read from 512 bytes into the file\n"
511 " Reads a segment of the currently open file, optionally dumping it to the\n"
512 " standard output stream (with -v option) for subsequent inspection.\n"
513 " Uses multiple iovec buffers if more than one byte range is specified.\n"
514 " -C, -- report statistics in a machine parsable format\n"
515 " -P, -- use a pattern to verify read data\n"
516 " -v, -- dump buffer to standard output\n"
517 " -q, -- quiet mode, do not show I/O statistics\n"
521 static int readv_f(int argc, char **argv);
523 static const cmdinfo_t readv_cmd = {
528 .args = "[-Cqv] [-P pattern ] off len [len..]",
529 .oneline = "reads a number of bytes at a specified offset",
533 static int readv_f(int argc, char **argv)
535 struct timeval t1, t2;
536 int Cflag = 0, qflag = 0, vflag = 0;
540 /* Some compilers get confused and warn if this is not initialized. */
547 while ((c = getopt(argc, argv, "CP:qv")) != EOF) {
554 pattern = parse_pattern(optarg);
566 return command_usage(&readv_cmd);
570 if (optind > argc - 2) {
571 return command_usage(&readv_cmd);
575 offset = cvtnum(argv[optind]);
577 printf("non-numeric length argument -- %s\n", argv[optind]);
582 if (offset & 0x1ff) {
583 printf("offset %" PRId64 " is not sector aligned\n",
588 nr_iov = argc - optind;
589 buf = create_iovec(&qiov, &argv[optind], nr_iov, 0xab);
594 gettimeofday(&t1, NULL);
595 cnt = do_aio_readv(&qiov, offset, &total);
596 gettimeofday(&t2, NULL);
599 printf("readv failed: %s\n", strerror(-cnt));
604 void *cmp_buf = malloc(qiov.size);
605 memset(cmp_buf, pattern, qiov.size);
606 if (memcmp(buf, cmp_buf, qiov.size)) {
607 printf("Pattern verification failed at offset %"
608 PRId64 ", %zd bytes\n", offset, qiov.size);
618 dump_buffer(buf, offset, qiov.size);
621 /* Finally, report back -- -C gives a parsable format */
623 print_report("read", &t2, offset, qiov.size, total, cnt, Cflag);
630 static void write_help(void)
634 " writes a range of bytes from the given offset\n"
637 " 'write 512 1k' - writes 1 kilobyte at 512 bytes into the open file\n"
639 " Writes into a segment of the currently open file, using a buffer\n"
640 " filled with a set pattern (0xcdcdcdcd).\n"
641 " -b, -- write to the VM state rather than the virtual disk\n"
642 " -p, -- use bdrv_pwrite to write the file\n"
643 " -P, -- use different pattern to fill file\n"
644 " -C, -- report statistics in a machine parsable format\n"
645 " -q, -- quiet mode, do not show I/O statistics\n"
649 static int write_f(int argc, char **argv);
651 static const cmdinfo_t write_cmd = {
657 .args = "[-abCpq] [-P pattern ] off len",
658 .oneline = "writes a number of bytes at a specified offset",
662 static int write_f(int argc, char **argv)
664 struct timeval t1, t2;
665 int Cflag = 0, pflag = 0, qflag = 0, bflag = 0;
670 /* Some compilers get confused and warn if this is not initialized. */
674 while ((c = getopt(argc, argv, "bCpP:q")) != EOF) {
686 pattern = parse_pattern(optarg);
695 return command_usage(&write_cmd);
699 if (optind != argc - 2) {
700 return command_usage(&write_cmd);
703 if (bflag && pflag) {
704 printf("-b and -p cannot be specified at the same time\n");
708 offset = cvtnum(argv[optind]);
710 printf("non-numeric length argument -- %s\n", argv[optind]);
715 count = cvtnum(argv[optind]);
717 printf("non-numeric length argument -- %s\n", argv[optind]);
722 if (offset & 0x1ff) {
723 printf("offset %" PRId64 " is not sector aligned\n",
729 printf("count %d is not sector aligned\n",
735 buf = qemu_io_alloc(count, pattern);
737 gettimeofday(&t1, NULL);
739 cnt = do_pwrite(buf, offset, count, &total);
741 cnt = do_save_vmstate(buf, offset, count, &total);
743 cnt = do_write(buf, offset, count, &total);
745 gettimeofday(&t2, NULL);
748 printf("write failed: %s\n", strerror(-cnt));
756 /* Finally, report back -- -C gives a parsable format */
758 print_report("wrote", &t2, offset, count, total, cnt, Cflag);
771 " writes a range of bytes from the given offset source from multiple buffers\n"
774 " 'write 512 1k 1k' - writes 2 kilobytes at 512 bytes into the open file\n"
776 " Writes into a segment of the currently open file, using a buffer\n"
777 " filled with a set pattern (0xcdcdcdcd).\n"
778 " -P, -- use different pattern to fill file\n"
779 " -C, -- report statistics in a machine parsable format\n"
780 " -q, -- quiet mode, do not show I/O statistics\n"
784 static int writev_f(int argc, char **argv);
786 static const cmdinfo_t writev_cmd = {
791 .args = "[-Cq] [-P pattern ] off len [len..]",
792 .oneline = "writes a number of bytes at a specified offset",
796 static int writev_f(int argc, char **argv)
798 struct timeval t1, t2;
799 int Cflag = 0, qflag = 0;
803 /* Some compilers get confused and warn if this is not initialized. */
809 while ((c = getopt(argc, argv, "CqP:")) != EOF) {
818 pattern = parse_pattern(optarg);
824 return command_usage(&writev_cmd);
828 if (optind > argc - 2) {
829 return command_usage(&writev_cmd);
832 offset = cvtnum(argv[optind]);
834 printf("non-numeric length argument -- %s\n", argv[optind]);
839 if (offset & 0x1ff) {
840 printf("offset %" PRId64 " is not sector aligned\n",
845 nr_iov = argc - optind;
846 buf = create_iovec(&qiov, &argv[optind], nr_iov, pattern);
851 gettimeofday(&t1, NULL);
852 cnt = do_aio_writev(&qiov, offset, &total);
853 gettimeofday(&t2, NULL);
856 printf("writev failed: %s\n", strerror(-cnt));
864 /* Finally, report back -- -C gives a parsable format */
866 print_report("wrote", &t2, offset, qiov.size, total, cnt, Cflag);
872 static void multiwrite_help(void)
876 " writes a range of bytes from the given offset source from multiple buffers,\n"
877 " in a batch of requests that may be merged by qemu\n"
880 " 'multiwrite 512 1k 1k ; 4k 1k'\n"
881 " writes 2 kB at 512 bytes and 1 kB at 4 kB into the open file\n"
883 " Writes into a segment of the currently open file, using a buffer\n"
884 " filled with a set pattern (0xcdcdcdcd). The pattern byte is increased\n"
885 " by one for each request contained in the multiwrite command.\n"
886 " -P, -- use different pattern to fill file\n"
887 " -C, -- report statistics in a machine parsable format\n"
888 " -q, -- quiet mode, do not show I/O statistics\n"
892 static int multiwrite_f(int argc, char **argv);
894 static const cmdinfo_t multiwrite_cmd = {
895 .name = "multiwrite",
896 .cfunc = multiwrite_f,
899 .args = "[-Cq] [-P pattern ] off len [len..] [; off len [len..]..]",
900 .oneline = "issues multiple write requests at once",
901 .help = multiwrite_help,
904 static int multiwrite_f(int argc, char **argv)
906 struct timeval t1, t2;
907 int Cflag = 0, qflag = 0;
910 int64_t offset, first_offset = 0;
911 /* Some compilers get confused and warn if this is not initialized. */
920 while ((c = getopt(argc, argv, "CqP:")) != EOF) {
929 pattern = parse_pattern(optarg);
935 return command_usage(&writev_cmd);
939 if (optind > argc - 2) {
940 return command_usage(&writev_cmd);
944 for (i = optind; i < argc; i++) {
945 if (!strcmp(argv[i], ";")) {
950 reqs = g_malloc0(nr_reqs * sizeof(*reqs));
951 buf = g_malloc0(nr_reqs * sizeof(*buf));
952 qiovs = g_malloc(nr_reqs * sizeof(*qiovs));
954 for (i = 0; i < nr_reqs && optind < argc; i++) {
957 /* Read the offset of the request */
958 offset = cvtnum(argv[optind]);
960 printf("non-numeric offset argument -- %s\n", argv[optind]);
965 if (offset & 0x1ff) {
966 printf("offset %lld is not sector aligned\n",
972 first_offset = offset;
975 /* Read lengths for qiov entries */
976 for (j = optind; j < argc; j++) {
977 if (!strcmp(argv[j], ";")) {
985 buf[i] = create_iovec(&qiovs[i], &argv[optind], nr_iov, pattern);
986 if (buf[i] == NULL) {
990 reqs[i].qiov = &qiovs[i];
991 reqs[i].sector = offset >> 9;
992 reqs[i].nb_sectors = reqs[i].qiov->size >> 9;
999 /* If there were empty requests at the end, ignore them */
1002 gettimeofday(&t1, NULL);
1003 cnt = do_aio_multiwrite(reqs, nr_reqs, &total);
1004 gettimeofday(&t2, NULL);
1007 printf("aio_multiwrite failed: %s\n", strerror(-cnt));
1015 /* Finally, report back -- -C gives a parsable format */
1017 print_report("wrote", &t2, first_offset, total, total, cnt, Cflag);
1019 for (i = 0; i < nr_reqs; i++) {
1020 qemu_io_free(buf[i]);
1021 if (reqs[i].qiov != NULL) {
1022 qemu_iovec_destroy(&qiovs[i]);
1043 static void aio_write_done(void *opaque, int ret)
1045 struct aio_ctx *ctx = opaque;
1048 gettimeofday(&t2, NULL);
1052 printf("aio_write failed: %s\n", strerror(-ret));
1060 /* Finally, report back -- -C gives a parsable format */
1061 t2 = tsub(t2, ctx->t1);
1062 print_report("wrote", &t2, ctx->offset, ctx->qiov.size,
1063 ctx->qiov.size, 1, ctx->Cflag);
1065 qemu_io_free(ctx->buf);
1069 static void aio_read_done(void *opaque, int ret)
1071 struct aio_ctx *ctx = opaque;
1074 gettimeofday(&t2, NULL);
1077 printf("readv failed: %s\n", strerror(-ret));
1082 void *cmp_buf = malloc(ctx->qiov.size);
1084 memset(cmp_buf, ctx->pattern, ctx->qiov.size);
1085 if (memcmp(ctx->buf, cmp_buf, ctx->qiov.size)) {
1086 printf("Pattern verification failed at offset %"
1087 PRId64 ", %zd bytes\n", ctx->offset, ctx->qiov.size);
1097 dump_buffer(ctx->buf, ctx->offset, ctx->qiov.size);
1100 /* Finally, report back -- -C gives a parsable format */
1101 t2 = tsub(t2, ctx->t1);
1102 print_report("read", &t2, ctx->offset, ctx->qiov.size,
1103 ctx->qiov.size, 1, ctx->Cflag);
1105 qemu_io_free(ctx->buf);
1109 static void aio_read_help(void)
1113 " asynchronously reads a range of bytes from the given offset\n"
1116 " 'aio_read -v 512 1k 1k ' - dumps 2 kilobytes read from 512 bytes into the file\n"
1118 " Reads a segment of the currently open file, optionally dumping it to the\n"
1119 " standard output stream (with -v option) for subsequent inspection.\n"
1120 " The read is performed asynchronously and the aio_flush command must be\n"
1121 " used to ensure all outstanding aio requests have been completed\n"
1122 " -C, -- report statistics in a machine parsable format\n"
1123 " -P, -- use a pattern to verify read data\n"
1124 " -v, -- dump buffer to standard output\n"
1125 " -q, -- quiet mode, do not show I/O statistics\n"
1129 static int aio_read_f(int argc, char **argv);
1131 static const cmdinfo_t aio_read_cmd = {
1133 .cfunc = aio_read_f,
1136 .args = "[-Cqv] [-P pattern ] off len [len..]",
1137 .oneline = "asynchronously reads a number of bytes",
1138 .help = aio_read_help,
1141 static int aio_read_f(int argc, char **argv)
1144 struct aio_ctx *ctx = calloc(1, sizeof(struct aio_ctx));
1146 while ((c = getopt(argc, argv, "CP:qv")) != EOF) {
1153 ctx->pattern = parse_pattern(optarg);
1154 if (ctx->pattern < 0) {
1167 return command_usage(&aio_read_cmd);
1171 if (optind > argc - 2) {
1173 return command_usage(&aio_read_cmd);
1176 ctx->offset = cvtnum(argv[optind]);
1177 if (ctx->offset < 0) {
1178 printf("non-numeric length argument -- %s\n", argv[optind]);
1184 if (ctx->offset & 0x1ff) {
1185 printf("offset %" PRId64 " is not sector aligned\n",
1191 nr_iov = argc - optind;
1192 ctx->buf = create_iovec(&ctx->qiov, &argv[optind], nr_iov, 0xab);
1193 if (ctx->buf == NULL) {
1198 gettimeofday(&ctx->t1, NULL);
1199 bdrv_aio_readv(bs, ctx->offset >> 9, &ctx->qiov,
1200 ctx->qiov.size >> 9, aio_read_done, ctx);
1204 static void aio_write_help(void)
1208 " asynchronously writes a range of bytes from the given offset source\n"
1209 " from multiple buffers\n"
1212 " 'aio_write 512 1k 1k' - writes 2 kilobytes at 512 bytes into the open file\n"
1214 " Writes into a segment of the currently open file, using a buffer\n"
1215 " filled with a set pattern (0xcdcdcdcd).\n"
1216 " The write is performed asynchronously and the aio_flush command must be\n"
1217 " used to ensure all outstanding aio requests have been completed\n"
1218 " -P, -- use different pattern to fill file\n"
1219 " -C, -- report statistics in a machine parsable format\n"
1220 " -q, -- quiet mode, do not show I/O statistics\n"
1224 static int aio_write_f(int argc, char **argv);
1226 static const cmdinfo_t aio_write_cmd = {
1227 .name = "aio_write",
1228 .cfunc = aio_write_f,
1231 .args = "[-Cq] [-P pattern ] off len [len..]",
1232 .oneline = "asynchronously writes a number of bytes",
1233 .help = aio_write_help,
1236 static int aio_write_f(int argc, char **argv)
1240 struct aio_ctx *ctx = calloc(1, sizeof(struct aio_ctx));
1242 while ((c = getopt(argc, argv, "CqP:")) != EOF) {
1251 pattern = parse_pattern(optarg);
1259 return command_usage(&aio_write_cmd);
1263 if (optind > argc - 2) {
1265 return command_usage(&aio_write_cmd);
1268 ctx->offset = cvtnum(argv[optind]);
1269 if (ctx->offset < 0) {
1270 printf("non-numeric length argument -- %s\n", argv[optind]);
1276 if (ctx->offset & 0x1ff) {
1277 printf("offset %" PRId64 " is not sector aligned\n",
1283 nr_iov = argc - optind;
1284 ctx->buf = create_iovec(&ctx->qiov, &argv[optind], nr_iov, pattern);
1285 if (ctx->buf == NULL) {
1290 gettimeofday(&ctx->t1, NULL);
1291 bdrv_aio_writev(bs, ctx->offset >> 9, &ctx->qiov,
1292 ctx->qiov.size >> 9, aio_write_done, ctx);
1296 static int aio_flush_f(int argc, char **argv)
1302 static const cmdinfo_t aio_flush_cmd = {
1303 .name = "aio_flush",
1304 .cfunc = aio_flush_f,
1305 .oneline = "completes all outstanding aio requests"
1308 static int flush_f(int argc, char **argv)
1314 static const cmdinfo_t flush_cmd = {
1318 .oneline = "flush all in-core file state to disk",
1321 static int truncate_f(int argc, char **argv)
1326 offset = cvtnum(argv[1]);
1328 printf("non-numeric truncate argument -- %s\n", argv[1]);
1332 ret = bdrv_truncate(bs, offset);
1334 printf("truncate: %s\n", strerror(-ret));
1341 static const cmdinfo_t truncate_cmd = {
1344 .cfunc = truncate_f,
1348 .oneline = "truncates the current file at the given offset",
1351 static int length_f(int argc, char **argv)
1356 size = bdrv_getlength(bs);
1358 printf("getlength: %s\n", strerror(-size));
1362 cvtstr(size, s1, sizeof(s1));
1368 static const cmdinfo_t length_cmd = {
1372 .oneline = "gets the length of the current file",
1376 static int info_f(int argc, char **argv)
1378 BlockDriverInfo bdi;
1379 char s1[64], s2[64];
1382 if (bs->drv && bs->drv->format_name) {
1383 printf("format name: %s\n", bs->drv->format_name);
1385 if (bs->drv && bs->drv->protocol_name) {
1386 printf("format name: %s\n", bs->drv->protocol_name);
1389 ret = bdrv_get_info(bs, &bdi);
1394 cvtstr(bdi.cluster_size, s1, sizeof(s1));
1395 cvtstr(bdi.vm_state_offset, s2, sizeof(s2));
1397 printf("cluster size: %s\n", s1);
1398 printf("vm state offset: %s\n", s2);
1405 static const cmdinfo_t info_cmd = {
1409 .oneline = "prints information about the current file",
1412 static void discard_help(void)
1416 " discards a range of bytes from the given offset\n"
1419 " 'discard 512 1k' - discards 1 kilobyte from 512 bytes into the file\n"
1421 " Discards a segment of the currently open file.\n"
1422 " -C, -- report statistics in a machine parsable format\n"
1423 " -q, -- quiet mode, do not show I/O statistics\n"
1427 static int discard_f(int argc, char **argv);
1429 static const cmdinfo_t discard_cmd = {
1435 .args = "[-Cq] off len",
1436 .oneline = "discards a number of bytes at a specified offset",
1437 .help = discard_help,
1440 static int discard_f(int argc, char **argv)
1442 struct timeval t1, t2;
1443 int Cflag = 0, qflag = 0;
1448 while ((c = getopt(argc, argv, "Cq")) != EOF) {
1457 return command_usage(&discard_cmd);
1461 if (optind != argc - 2) {
1462 return command_usage(&discard_cmd);
1465 offset = cvtnum(argv[optind]);
1467 printf("non-numeric length argument -- %s\n", argv[optind]);
1472 count = cvtnum(argv[optind]);
1474 printf("non-numeric length argument -- %s\n", argv[optind]);
1478 gettimeofday(&t1, NULL);
1479 ret = bdrv_discard(bs, offset >> BDRV_SECTOR_BITS,
1480 count >> BDRV_SECTOR_BITS);
1481 gettimeofday(&t2, NULL);
1484 printf("discard failed: %s\n", strerror(-ret));
1488 /* Finally, report back -- -C gives a parsable format */
1491 print_report("discard", &t2, offset, count, count, 1, Cflag);
1498 static int alloc_f(int argc, char **argv)
1501 int nb_sectors, remaining;
1506 offset = cvtnum(argv[1]);
1507 if (offset & 0x1ff) {
1508 printf("offset %" PRId64 " is not sector aligned\n",
1514 nb_sectors = cvtnum(argv[2]);
1519 remaining = nb_sectors;
1522 ret = bdrv_is_allocated(bs, offset >> 9, nb_sectors, &num);
1529 cvtstr(offset, s1, sizeof(s1));
1531 printf("%d/%d sectors allocated at offset %s\n",
1532 sum_alloc, nb_sectors, s1);
1536 static const cmdinfo_t alloc_cmd = {
1542 .args = "off [sectors]",
1543 .oneline = "checks if a sector is present in the file",
1546 static int map_f(int argc, char **argv)
1551 int num, num_checked;
1556 nb_sectors = bs->total_sectors;
1559 num_checked = MIN(nb_sectors, INT_MAX);
1560 ret = bdrv_is_allocated(bs, offset, num_checked, &num);
1561 retstr = ret ? " allocated" : "not allocated";
1562 cvtstr(offset << 9ULL, s1, sizeof(s1));
1563 printf("[% 24" PRId64 "] % 8d/% 8d sectors %s at offset %s (%d)\n",
1564 offset << 9ULL, num, num_checked, retstr, s1, ret);
1568 } while (offset < bs->total_sectors);
1573 static const cmdinfo_t map_cmd = {
1579 .oneline = "prints the allocated areas of a file",
1583 static int close_f(int argc, char **argv)
1590 static const cmdinfo_t close_cmd = {
1594 .oneline = "close the current open file",
1597 static int openfile(char *name, int flags, int growable)
1600 fprintf(stderr, "file open already, try 'help close'\n");
1605 if (bdrv_file_open(&bs, name, flags)) {
1606 fprintf(stderr, "%s: can't open device %s\n", progname, name);
1610 bs = bdrv_new("hda");
1612 if (bdrv_open(bs, name, flags, NULL) < 0) {
1613 fprintf(stderr, "%s: can't open device %s\n", progname, name);
1623 static void open_help(void)
1627 " opens a new file in the requested mode\n"
1630 " 'open -Cn /tmp/data' - creates/opens data file read-write and uncached\n"
1632 " Opens a file for subsequent use by all of the other qemu-io commands.\n"
1633 " -r, -- open file read-only\n"
1634 " -s, -- use snapshot file\n"
1635 " -n, -- disable host cache\n"
1636 " -g, -- allow file to grow (only applies to protocols)"
1640 static int open_f(int argc, char **argv);
1642 static const cmdinfo_t open_cmd = {
1648 .flags = CMD_NOFILE_OK,
1649 .args = "[-Crsn] [path]",
1650 .oneline = "open the file specified by path",
1654 static int open_f(int argc, char **argv)
1661 while ((c = getopt(argc, argv, "snrg")) != EOF) {
1664 flags |= BDRV_O_SNAPSHOT;
1667 flags |= BDRV_O_NOCACHE | BDRV_O_CACHE_WB;
1676 return command_usage(&open_cmd);
1681 flags |= BDRV_O_RDWR;
1684 if (optind != argc - 1) {
1685 return command_usage(&open_cmd);
1688 return openfile(argv[optind], flags, growable);
1691 static int init_args_command(int index)
1693 /* only one device allowed so far */
1700 static int init_check_command(const cmdinfo_t *ct)
1702 if (ct->flags & CMD_FLAG_GLOBAL) {
1705 if (!(ct->flags & CMD_NOFILE_OK) && !bs) {
1706 fprintf(stderr, "no file open, try 'help open'\n");
1712 static void usage(const char *name)
1715 "Usage: %s [-h] [-V] [-rsnm] [-c cmd] ... [file]\n"
1716 "QEMU Disk exerciser\n"
1718 " -c, --cmd command to execute\n"
1719 " -r, --read-only export read-only\n"
1720 " -s, --snapshot use snapshot file\n"
1721 " -n, --nocache disable host cache\n"
1722 " -g, --growable allow file to grow (only applies to protocols)\n"
1723 " -m, --misalign misalign allocations for O_DIRECT\n"
1724 " -k, --native-aio use kernel AIO implementation (on Linux only)\n"
1725 " -h, --help display this help and exit\n"
1726 " -V, --version output version information and exit\n"
1732 int main(int argc, char **argv)
1736 const char *sopt = "hVc:rsnmgk";
1737 const struct option lopt[] = {
1738 { "help", 0, NULL, 'h' },
1739 { "version", 0, NULL, 'V' },
1740 { "offset", 1, NULL, 'o' },
1741 { "cmd", 1, NULL, 'c' },
1742 { "read-only", 0, NULL, 'r' },
1743 { "snapshot", 0, NULL, 's' },
1744 { "nocache", 0, NULL, 'n' },
1745 { "misalign", 0, NULL, 'm' },
1746 { "growable", 0, NULL, 'g' },
1747 { "native-aio", 0, NULL, 'k' },
1748 { NULL, 0, NULL, 0 }
1754 progname = basename(argv[0]);
1756 while ((c = getopt_long(argc, argv, sopt, lopt, &opt_index)) != -1) {
1759 flags |= BDRV_O_SNAPSHOT;
1762 flags |= BDRV_O_NOCACHE | BDRV_O_CACHE_WB;
1765 add_user_command(optarg);
1777 flags |= BDRV_O_NATIVE_AIO;
1780 printf("%s version %s\n", progname, VERSION);
1791 if ((argc - optind) > 1) {
1798 /* initialize commands */
1801 add_command(&open_cmd);
1802 add_command(&close_cmd);
1803 add_command(&read_cmd);
1804 add_command(&readv_cmd);
1805 add_command(&write_cmd);
1806 add_command(&writev_cmd);
1807 add_command(&multiwrite_cmd);
1808 add_command(&aio_read_cmd);
1809 add_command(&aio_write_cmd);
1810 add_command(&aio_flush_cmd);
1811 add_command(&flush_cmd);
1812 add_command(&truncate_cmd);
1813 add_command(&length_cmd);
1814 add_command(&info_cmd);
1815 add_command(&discard_cmd);
1816 add_command(&alloc_cmd);
1817 add_command(&map_cmd);
1819 add_args_command(init_args_command);
1820 add_check_command(init_check_command);
1822 /* open the device */
1824 flags |= BDRV_O_RDWR;
1827 if ((argc - optind) == 1) {
1828 openfile(argv[optind], flags, growable);
1833 * Make sure all outstanding requests complete before the program exits.