File:  [Qemu by Fabrice Bellard] / qemu / qemu-io.c
Revision 1.1.1.2 (vendor branch): download - view: text, annotated - select for diffs
Tue Apr 24 17:35:06 2018 UTC (19 months, 2 weeks ago) by root
Branches: qemu, MAIN
CVS tags: qemu0125, qemu0124, qemu0123, qemu0122, qemu0121, qemu0120, HEAD
qemu 0.12.0

    1: /*
    2:  * Command line utility to exercise the QEMU I/O path.
    3:  *
    4:  * Copyright (C) 2009 Red Hat, Inc.
    5:  * Copyright (c) 2003-2005 Silicon Graphics, Inc.
    6:  *
    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.
    9:  */
   10: #include <sys/time.h>
   11: #include <sys/types.h>
   12: #include <stdarg.h>
   13: #include <stdio.h>
   14: #include <getopt.h>
   15: #include <libgen.h>
   16: 
   17: #include "qemu-common.h"
   18: #include "block_int.h"
   19: #include "cmd.h"
   20: 
   21: #define VERSION	"0.0.1"
   22: 
   23: #define CMD_NOFILE_OK	0x01
   24: 
   25: char *progname;
   26: static BlockDriverState *bs;
   27: 
   28: static int misalign;
   29: 
   30: /*
   31:  * Parse the pattern argument to various sub-commands.
   32:  *
   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.
   35:  */
   36: static int parse_pattern(const char *arg)
   37: {
   38: 	char *endptr = NULL;
   39: 	long pattern;
   40: 
   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);
   44: 		return -1;
   45: 	}
   46: 
   47: 	return pattern;
   48: }
   49: 
   50: /*
   51:  * Memory allocation helpers.
   52:  *
   53:  * Make sure memory is aligned by default, or purposefully misaligned if
   54:  * that is specified on the command line.
   55:  */
   56: 
   57: #define MISALIGN_OFFSET		16
   58: static void *qemu_io_alloc(size_t len, int pattern)
   59: {
   60: 	void *buf;
   61: 
   62: 	if (misalign)
   63: 		len += MISALIGN_OFFSET;
   64: 	buf = qemu_memalign(512, len);
   65: 	memset(buf, pattern, len);
   66: 	if (misalign)
   67: 		buf += MISALIGN_OFFSET;
   68: 	return buf;
   69: }
   70: 
   71: static void qemu_io_free(void *p)
   72: {
   73: 	if (misalign)
   74: 		p -= MISALIGN_OFFSET;
   75: 	qemu_vfree(p);
   76: }
   77: 
   78: static void
   79: dump_buffer(const void *buffer, int64_t offset, int len)
   80: {
   81: 	int i, j;
   82: 	const uint8_t *p;
   83: 
   84: 	for (i = 0, p = buffer; i < len; i += 16) {
   85: 		const uint8_t *s = p;
   86: 
   87: 		printf("%08llx:  ", (unsigned long long)offset + i);
   88: 		for (j = 0; j < 16 && i + j < len; j++, p++)
   89: 			printf("%02x ", *p);
   90: 		printf(" ");
   91: 		for (j = 0; j < 16 && i + j < len; j++, s++) {
   92: 			if (isalnum(*s))
   93: 				printf("%c", *s);
   94: 			else
   95: 				printf(".");
   96: 		}
   97: 		printf("\n");
   98: 	}
   99: }
  100: 
  101: static void
  102: print_report(const char *op, struct timeval *t, int64_t offset,
  103: 		int count, int total, int cnt, int Cflag)
  104: {
  105: 	char s1[64], s2[64], ts[64];
  106: 
  107: 	timestr(t, ts, sizeof(ts), Cflag ? VERBOSE_FIXED_TIME : 0);
  108: 	if (!Cflag) {
  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",
  117: 			total, cnt, ts,
  118: 			tdiv((double)total, *t),
  119: 			tdiv((double)cnt, *t));
  120: 	}
  121: }
  122: 
  123: /*
  124:  * Parse multiple length statements for vectored I/O, and construct an I/O
  125:  * vector matching it.
  126:  */
  127: static void *
  128: create_iovec(QEMUIOVector *qiov, char **argv, int nr_iov, int pattern)
  129: {
  130: 	size_t *sizes = calloc(nr_iov, sizeof(size_t));
  131: 	size_t count = 0;
  132: 	void *buf = NULL;
  133: 	void *p;
  134: 	int i;
  135: 
  136: 	for (i = 0; i < nr_iov; i++) {
  137: 		char *arg = argv[i];
  138: 		long long len;
  139: 
  140: 		len = cvtnum(arg);
  141: 		if (len < 0) {
  142: 			printf("non-numeric length argument -- %s\n", arg);
  143: 			goto fail;
  144: 		}
  145: 
  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);
  149: 			goto fail;
  150: 		}
  151: 
  152: 		if (len & 0x1ff) {
  153: 			printf("length argument %lld is not sector aligned\n",
  154: 				len);
  155: 			goto fail;
  156: 		}
  157: 
  158: 		sizes[i] = len;
  159: 		count += len;
  160: 	}
  161: 
  162: 	qemu_iovec_init(qiov, nr_iov);
  163: 
  164: 	buf = p = qemu_io_alloc(count, pattern);
  165: 
  166: 	for (i = 0; i < nr_iov; i++) {
  167: 		qemu_iovec_add(qiov, p, sizes[i]);
  168: 		p += sizes[i];
  169: 	}
  170: 
  171: fail:
  172: 	free(sizes);
  173: 	return buf;
  174: }
  175: 
  176: static int do_read(char *buf, int64_t offset, int count, int *total)
  177: {
  178: 	int ret;
  179: 
  180: 	ret = bdrv_read(bs, offset >> 9, (uint8_t *)buf, count >> 9);
  181: 	if (ret < 0)
  182: 		return ret;
  183: 	*total = count;
  184: 	return 1;
  185: }
  186: 
  187: static int do_write(char *buf, int64_t offset, int count, int *total)
  188: {
  189: 	int ret;
  190: 
  191: 	ret = bdrv_write(bs, offset >> 9, (uint8_t *)buf, count >> 9);
  192: 	if (ret < 0)
  193: 		return ret;
  194: 	*total = count;
  195: 	return 1;
  196: }
  197: 
  198: static int do_pread(char *buf, int64_t offset, int count, int *total)
  199: {
  200: 	*total = bdrv_pread(bs, offset, (uint8_t *)buf, count);
  201: 	if (*total < 0)
  202: 		return *total;
  203: 	return 1;
  204: }
  205: 
  206: static int do_pwrite(char *buf, int64_t offset, int count, int *total)
  207: {
  208: 	*total = bdrv_pwrite(bs, offset, (uint8_t *)buf, count);
  209: 	if (*total < 0)
  210: 		return *total;
  211: 	return 1;
  212: }
  213: 
  214: static int do_load_vmstate(char *buf, int64_t offset, int count, int *total)
  215: {
  216: 	*total = bdrv_load_vmstate(bs, (uint8_t *)buf, offset, count);
  217: 	if (*total < 0)
  218: 		return *total;
  219: 	return 1;
  220: }
  221: 
  222: static int do_save_vmstate(char *buf, int64_t offset, int count, int *total)
  223: {
  224: 	*total = bdrv_save_vmstate(bs, (uint8_t *)buf, offset, count);
  225: 	if (*total < 0)
  226: 		return *total;
  227: 	return 1;
  228: }
  229: 
  230: #define NOT_DONE 0x7fffffff
  231: static void aio_rw_done(void *opaque, int ret)
  232: {
  233: 	*(int *)opaque = ret;
  234: }
  235: 
  236: static int do_aio_readv(QEMUIOVector *qiov, int64_t offset, int *total)
  237: {
  238: 	BlockDriverAIOCB *acb;
  239: 	int async_ret = NOT_DONE;
  240: 
  241: 	acb = bdrv_aio_readv(bs, offset >> 9, qiov, qiov->size >> 9,
  242: 			     aio_rw_done, &async_ret);
  243: 	if (!acb)
  244: 		return -EIO;
  245: 
  246: 	while (async_ret == NOT_DONE)
  247: 		qemu_aio_wait();
  248: 
  249: 	*total = qiov->size;
  250: 	return async_ret < 0 ? async_ret : 1;
  251: }
  252: 
  253: static int do_aio_writev(QEMUIOVector *qiov, int64_t offset, int *total)
  254: {
  255: 	BlockDriverAIOCB *acb;
  256: 	int async_ret = NOT_DONE;
  257: 
  258: 	acb = bdrv_aio_writev(bs, offset >> 9, qiov, qiov->size >> 9,
  259: 			      aio_rw_done, &async_ret);
  260: 	if (!acb)
  261: 		return -EIO;
  262: 
  263: 	while (async_ret == NOT_DONE)
  264: 		qemu_aio_wait();
  265: 
  266: 	*total = qiov->size;
  267: 	return async_ret < 0 ? async_ret : 1;
  268: }
  269: 
  270: 
  271: static void
  272: read_help(void)
  273: {
  274: 	printf(
  275: "\n"
  276: " reads a range of bytes from the given offset\n"
  277: "\n"
  278: " Example:\n"
  279: " 'read -v 512 1k' - dumps 1 kilobyte read from 512 bytes into the file\n"
  280: "\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"
  291: "\n");
  292: }
  293: 
  294: static int read_f(int argc, char **argv);
  295: 
  296: static const cmdinfo_t read_cmd = {
  297: 	.name		= "read",
  298: 	.altname	= "r",
  299: 	.cfunc		= read_f,
  300: 	.argmin		= 2,
  301: 	.argmax		= -1,
  302: 	.args		= "[-abCpqv] [-P pattern [-s off] [-l len]] off len",
  303: 	.oneline	= "reads a number of bytes at a specified offset",
  304: 	.help		= read_help,
  305: };
  306: 
  307: static int
  308: read_f(int argc, char **argv)
  309: {
  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;
  313: 	int c, cnt;
  314: 	char *buf;
  315: 	int64_t offset;
  316: 	int count;
  317:         /* Some compilers get confused and warn if this is not initialized.  */
  318:         int total = 0;
  319: 	int pattern = 0, pattern_offset = 0, pattern_count = 0;
  320: 
  321: 	while ((c = getopt(argc, argv, "bCl:pP:qs:v")) != EOF) {
  322: 		switch (c) {
  323: 		case 'b':
  324: 			bflag = 1;
  325: 			break;
  326: 		case 'C':
  327: 			Cflag = 1;
  328: 			break;
  329: 		case 'l':
  330: 			lflag = 1;
  331: 			pattern_count = cvtnum(optarg);
  332: 			if (pattern_count < 0) {
  333: 				printf("non-numeric length argument -- %s\n", optarg);
  334: 				return 0;
  335: 			}
  336: 			break;
  337: 		case 'p':
  338: 			pflag = 1;
  339: 			break;
  340: 		case 'P':
  341: 			Pflag = 1;
  342: 			pattern = parse_pattern(optarg);
  343: 			if (pattern < 0)
  344: 				return 0;
  345: 			break;
  346: 		case 'q':
  347: 			qflag = 1;
  348: 			break;
  349: 		case 's':
  350: 			sflag = 1;
  351: 			pattern_offset = cvtnum(optarg);
  352: 			if (pattern_offset < 0) {
  353: 				printf("non-numeric length argument -- %s\n", optarg);
  354: 				return 0;
  355: 			}
  356: 			break;
  357: 		case 'v':
  358: 			vflag = 1;
  359: 			break;
  360: 		default:
  361: 			return command_usage(&read_cmd);
  362: 		}
  363: 	}
  364: 
  365: 	if (optind != argc - 2)
  366: 		return command_usage(&read_cmd);
  367: 
  368: 	if (bflag && pflag) {
  369: 		printf("-b and -p cannot be specified at the same time\n");
  370: 		return 0;
  371: 	}
  372: 
  373: 	offset = cvtnum(argv[optind]);
  374: 	if (offset < 0) {
  375: 		printf("non-numeric length argument -- %s\n", argv[optind]);
  376: 		return 0;
  377: 	}
  378: 
  379: 	optind++;
  380: 	count = cvtnum(argv[optind]);
  381: 	if (count < 0) {
  382: 		printf("non-numeric length argument -- %s\n", argv[optind]);
  383: 		return 0;
  384: 	}
  385: 
  386:     if (!Pflag && (lflag || sflag)) {
  387:         return command_usage(&read_cmd);
  388:     }
  389: 
  390:     if (!lflag) {
  391:         pattern_count = count - pattern_offset;
  392:     }
  393: 
  394:     if ((pattern_count < 0) || (pattern_count + pattern_offset > count))  {
  395:         printf("pattern verfication range exceeds end of read data\n");
  396:         return 0;
  397:     }
  398: 
  399: 	if (!pflag)
  400: 		if (offset & 0x1ff) {
  401: 			printf("offset %lld is not sector aligned\n",
  402: 				(long long)offset);
  403: 			return 0;
  404: 
  405: 		if (count & 0x1ff) {
  406: 			printf("count %d is not sector aligned\n",
  407: 				count);
  408: 			return 0;
  409: 		}
  410: 	}
  411: 
  412: 	buf = qemu_io_alloc(count, 0xab);
  413: 
  414: 	gettimeofday(&t1, NULL);
  415: 	if (pflag)
  416: 		cnt = do_pread(buf, offset, count, &total);
  417: 	else if (bflag)
  418: 		cnt = do_load_vmstate(buf, offset, count, &total);
  419: 	else
  420: 		cnt = do_read(buf, offset, count, &total);
  421: 	gettimeofday(&t2, NULL);
  422: 
  423: 	if (cnt < 0) {
  424: 		printf("read failed: %s\n", strerror(-cnt));
  425: 		goto out;
  426: 	}
  427: 
  428: 	if (Pflag) {
  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, "
  433: 				"%d bytes\n",
  434: 				(long long) offset + pattern_offset, pattern_count);
  435: 		}
  436: 		free(cmp_buf);
  437: 	}
  438: 
  439: 	if (qflag)
  440: 		goto out;
  441: 
  442:         if (vflag)
  443: 		dump_buffer(buf, offset, count);
  444: 
  445: 	/* Finally, report back -- -C gives a parsable format */
  446: 	t2 = tsub(t2, t1);
  447: 	print_report("read", &t2, offset, count, total, cnt, Cflag);
  448: 
  449: out:
  450: 	qemu_io_free(buf);
  451: 
  452: 	return 0;
  453: }
  454: 
  455: static void
  456: readv_help(void)
  457: {
  458: 	printf(
  459: "\n"
  460: " reads a range of bytes from the given offset into multiple buffers\n"
  461: "\n"
  462: " Example:\n"
  463: " 'readv -v 512 1k 1k ' - dumps 2 kilobytes read from 512 bytes into the file\n"
  464: "\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"
  472: "\n");
  473: }
  474: 
  475: static int readv_f(int argc, char **argv);
  476: 
  477: static const cmdinfo_t readv_cmd = {
  478: 	.name		= "readv",
  479: 	.cfunc		= readv_f,
  480: 	.argmin		= 2,
  481: 	.argmax		= -1,
  482: 	.args		= "[-Cqv] [-P pattern ] off len [len..]",
  483: 	.oneline	= "reads a number of bytes at a specified offset",
  484: 	.help		= readv_help,
  485: };
  486: 
  487: static int
  488: readv_f(int argc, char **argv)
  489: {
  490: 	struct timeval t1, t2;
  491: 	int Cflag = 0, qflag = 0, vflag = 0;
  492: 	int c, cnt;
  493: 	char *buf;
  494: 	int64_t offset;
  495: 	int total;
  496: 	int nr_iov;
  497: 	QEMUIOVector qiov;
  498: 	int pattern = 0;
  499: 	int Pflag = 0;
  500: 
  501: 	while ((c = getopt(argc, argv, "CP:qv")) != EOF) {
  502: 		switch (c) {
  503: 		case 'C':
  504: 			Cflag = 1;
  505: 			break;
  506: 		case 'P':
  507: 			Pflag = 1;
  508: 			pattern = parse_pattern(optarg);
  509: 			if (pattern < 0)
  510: 				return 0;
  511: 			break;
  512: 		case 'q':
  513: 			qflag = 1;
  514: 			break;
  515: 		case 'v':
  516: 			vflag = 1;
  517: 			break;
  518: 		default:
  519: 			return command_usage(&readv_cmd);
  520: 		}
  521: 	}
  522: 
  523: 	if (optind > argc - 2)
  524: 		return command_usage(&readv_cmd);
  525: 
  526: 
  527: 	offset = cvtnum(argv[optind]);
  528: 	if (offset < 0) {
  529: 		printf("non-numeric length argument -- %s\n", argv[optind]);
  530: 		return 0;
  531: 	}
  532: 	optind++;
  533: 
  534: 	if (offset & 0x1ff) {
  535: 		printf("offset %lld is not sector aligned\n",
  536: 			(long long)offset);
  537: 		return 0;
  538: 	}
  539: 
  540: 	nr_iov = argc - optind;
  541: 	buf = create_iovec(&qiov, &argv[optind], nr_iov, 0xab);
  542: 
  543: 	gettimeofday(&t1, NULL);
  544: 	cnt = do_aio_readv(&qiov, offset, &total);
  545: 	gettimeofday(&t2, NULL);
  546: 
  547: 	if (cnt < 0) {
  548: 		printf("readv failed: %s\n", strerror(-cnt));
  549: 		goto out;
  550: 	}
  551: 
  552: 	if (Pflag) {
  553: 		void* cmp_buf = malloc(qiov.size);
  554: 		memset(cmp_buf, pattern, qiov.size);
  555: 		if (memcmp(buf, cmp_buf, qiov.size)) {
  556: 			printf("Pattern verification failed at offset %lld, "
  557: 				"%zd bytes\n",
  558: 				(long long) offset, qiov.size);
  559: 		}
  560: 		free(cmp_buf);
  561: 	}
  562: 
  563: 	if (qflag)
  564: 		goto out;
  565: 
  566:         if (vflag)
  567: 		dump_buffer(buf, offset, qiov.size);
  568: 
  569: 	/* Finally, report back -- -C gives a parsable format */
  570: 	t2 = tsub(t2, t1);
  571: 	print_report("read", &t2, offset, qiov.size, total, cnt, Cflag);
  572: 
  573: out:
  574: 	qemu_io_free(buf);
  575: 	return 0;
  576: }
  577: 
  578: static void
  579: write_help(void)
  580: {
  581: 	printf(
  582: "\n"
  583: " writes a range of bytes from the given offset\n"
  584: "\n"
  585: " Example:\n"
  586: " 'write 512 1k' - writes 1 kilobyte at 512 bytes into the open file\n"
  587: "\n"
  588: " Writes into a segment of the currently open file, using a buffer\n"
  589: " filled with a set pattern (0xcdcdcdcd).\n"
  590: " -b, -- write to the VM state rather than the virtual disk\n"
  591: " -p, -- use bdrv_pwrite to write the file\n"
  592: " -P, -- use different pattern to fill file\n"
  593: " -C, -- report statistics in a machine parsable format\n"
  594: " -q, -- quite mode, do not show I/O statistics\n"
  595: "\n");
  596: }
  597: 
  598: static int write_f(int argc, char **argv);
  599: 
  600: static const cmdinfo_t write_cmd = {
  601: 	.name		= "write",
  602: 	.altname	= "w",
  603: 	.cfunc		= write_f,
  604: 	.argmin		= 2,
  605: 	.argmax		= -1,
  606: 	.args		= "[-abCpq] [-P pattern ] off len",
  607: 	.oneline	= "writes a number of bytes at a specified offset",
  608: 	.help		= write_help,
  609: };
  610: 
  611: static int
  612: write_f(int argc, char **argv)
  613: {
  614: 	struct timeval t1, t2;
  615: 	int Cflag = 0, pflag = 0, qflag = 0, bflag = 0;
  616: 	int c, cnt;
  617: 	char *buf;
  618: 	int64_t offset;
  619: 	int count;
  620:         /* Some compilers get confused and warn if this is not initialized.  */
  621:         int total = 0;
  622: 	int pattern = 0xcd;
  623: 
  624: 	while ((c = getopt(argc, argv, "bCpP:q")) != EOF) {
  625: 		switch (c) {
  626: 		case 'b':
  627: 			bflag = 1;
  628: 			break;
  629: 		case 'C':
  630: 			Cflag = 1;
  631: 			break;
  632: 		case 'p':
  633: 			pflag = 1;
  634: 			break;
  635: 		case 'P':
  636: 			pattern = parse_pattern(optarg);
  637: 			if (pattern < 0)
  638: 				return 0;
  639: 			break;
  640: 		case 'q':
  641: 			qflag = 1;
  642: 			break;
  643: 		default:
  644: 			return command_usage(&write_cmd);
  645: 		}
  646: 	}
  647: 
  648: 	if (optind != argc - 2)
  649: 		return command_usage(&write_cmd);
  650: 
  651: 	if (bflag && pflag) {
  652: 		printf("-b and -p cannot be specified at the same time\n");
  653: 		return 0;
  654: 	}
  655: 
  656: 	offset = cvtnum(argv[optind]);
  657: 	if (offset < 0) {
  658: 		printf("non-numeric length argument -- %s\n", argv[optind]);
  659: 		return 0;
  660: 	}
  661: 
  662: 	optind++;
  663: 	count = cvtnum(argv[optind]);
  664: 	if (count < 0) {
  665: 		printf("non-numeric length argument -- %s\n", argv[optind]);
  666: 		return 0;
  667: 	}
  668: 
  669: 	if (!pflag) {
  670: 		if (offset & 0x1ff) {
  671: 			printf("offset %lld is not sector aligned\n",
  672: 				(long long)offset);
  673: 			return 0;
  674: 		}
  675: 
  676: 		if (count & 0x1ff) {
  677: 			printf("count %d is not sector aligned\n",
  678: 				count);
  679: 			return 0;
  680: 		}
  681: 	}
  682: 
  683: 	buf = qemu_io_alloc(count, pattern);
  684: 
  685: 	gettimeofday(&t1, NULL);
  686: 	if (pflag)
  687: 		cnt = do_pwrite(buf, offset, count, &total);
  688: 	else if (bflag)
  689: 		cnt = do_save_vmstate(buf, offset, count, &total);
  690: 	else
  691: 		cnt = do_write(buf, offset, count, &total);
  692: 	gettimeofday(&t2, NULL);
  693: 
  694: 	if (cnt < 0) {
  695: 		printf("write failed: %s\n", strerror(-cnt));
  696: 		goto out;
  697: 	}
  698: 
  699: 	if (qflag)
  700: 		goto out;
  701: 
  702: 	/* Finally, report back -- -C gives a parsable format */
  703: 	t2 = tsub(t2, t1);
  704: 	print_report("wrote", &t2, offset, count, total, cnt, Cflag);
  705: 
  706: out:
  707: 	qemu_io_free(buf);
  708: 
  709: 	return 0;
  710: }
  711: 
  712: static void
  713: writev_help(void)
  714: {
  715: 	printf(
  716: "\n"
  717: " writes a range of bytes from the given offset source from multiple buffers\n"
  718: "\n"
  719: " Example:\n"
  720: " 'write 512 1k 1k' - writes 2 kilobytes at 512 bytes into the open file\n"
  721: "\n"
  722: " Writes into a segment of the currently open file, using a buffer\n"
  723: " filled with a set pattern (0xcdcdcdcd).\n"
  724: " -P, -- use different pattern to fill file\n"
  725: " -C, -- report statistics in a machine parsable format\n"
  726: " -q, -- quite mode, do not show I/O statistics\n"
  727: "\n");
  728: }
  729: 
  730: static int writev_f(int argc, char **argv);
  731: 
  732: static const cmdinfo_t writev_cmd = {
  733: 	.name		= "writev",
  734: 	.cfunc		= writev_f,
  735: 	.argmin		= 2,
  736: 	.argmax		= -1,
  737: 	.args		= "[-Cq] [-P pattern ] off len [len..]",
  738: 	.oneline	= "writes a number of bytes at a specified offset",
  739: 	.help		= writev_help,
  740: };
  741: 
  742: static int
  743: writev_f(int argc, char **argv)
  744: {
  745: 	struct timeval t1, t2;
  746: 	int Cflag = 0, qflag = 0;
  747: 	int c, cnt;
  748: 	char *buf;
  749: 	int64_t offset;
  750: 	int total;
  751: 	int nr_iov;
  752: 	int pattern = 0xcd;
  753: 	QEMUIOVector qiov;
  754: 
  755: 	while ((c = getopt(argc, argv, "CqP:")) != EOF) {
  756: 		switch (c) {
  757: 		case 'C':
  758: 			Cflag = 1;
  759: 			break;
  760: 		case 'q':
  761: 			qflag = 1;
  762: 			break;
  763: 		case 'P':
  764: 			pattern = parse_pattern(optarg);
  765: 			if (pattern < 0)
  766: 				return 0;
  767: 			break;
  768: 		default:
  769: 			return command_usage(&writev_cmd);
  770: 		}
  771: 	}
  772: 
  773: 	if (optind > argc - 2)
  774: 		return command_usage(&writev_cmd);
  775: 
  776: 	offset = cvtnum(argv[optind]);
  777: 	if (offset < 0) {
  778: 		printf("non-numeric length argument -- %s\n", argv[optind]);
  779: 		return 0;
  780: 	}
  781: 	optind++;
  782: 
  783: 	if (offset & 0x1ff) {
  784: 		printf("offset %lld is not sector aligned\n",
  785: 			(long long)offset);
  786: 		return 0;
  787: 	}
  788: 
  789: 	nr_iov = argc - optind;
  790: 	buf = create_iovec(&qiov, &argv[optind], nr_iov, pattern);
  791: 
  792: 	gettimeofday(&t1, NULL);
  793: 	cnt = do_aio_writev(&qiov, offset, &total);
  794: 	gettimeofday(&t2, NULL);
  795: 
  796: 	if (cnt < 0) {
  797: 		printf("writev failed: %s\n", strerror(-cnt));
  798: 		goto out;
  799: 	}
  800: 
  801: 	if (qflag)
  802: 		goto out;
  803: 
  804: 	/* Finally, report back -- -C gives a parsable format */
  805: 	t2 = tsub(t2, t1);
  806: 	print_report("wrote", &t2, offset, qiov.size, total, cnt, Cflag);
  807: out:
  808: 	qemu_io_free(buf);
  809: 	return 0;
  810: }
  811: 
  812: struct aio_ctx {
  813: 	QEMUIOVector qiov;
  814: 	int64_t offset;
  815: 	char *buf;
  816: 	int qflag;
  817: 	int vflag;
  818: 	int Cflag;
  819: 	int Pflag;
  820: 	int pattern;
  821: 	struct timeval t1;
  822: };
  823: 
  824: static void
  825: aio_write_done(void *opaque, int ret)
  826: {
  827: 	struct aio_ctx *ctx = opaque;
  828: 	struct timeval t2;
  829: 
  830: 	gettimeofday(&t2, NULL);
  831: 
  832: 
  833: 	if (ret < 0) {
  834: 		printf("aio_write failed: %s\n", strerror(-ret));
  835: 		goto out;
  836: 	}
  837: 
  838: 	if (ctx->qflag) {
  839: 		goto out;
  840: 	}
  841: 
  842: 	/* Finally, report back -- -C gives a parsable format */
  843: 	t2 = tsub(t2, ctx->t1);
  844: 	print_report("wrote", &t2, ctx->offset, ctx->qiov.size,
  845: 		     ctx->qiov.size, 1, ctx->Cflag);
  846: out:
  847: 	qemu_io_free(ctx->buf);
  848: 	free(ctx);
  849: }
  850: 
  851: static void
  852: aio_read_done(void *opaque, int ret)
  853: {
  854: 	struct aio_ctx *ctx = opaque;
  855: 	struct timeval t2;
  856: 
  857: 	gettimeofday(&t2, NULL);
  858: 
  859: 	if (ret < 0) {
  860: 		printf("readv failed: %s\n", strerror(-ret));
  861: 		goto out;
  862: 	}
  863: 
  864: 	if (ctx->Pflag) {
  865: 		void *cmp_buf = malloc(ctx->qiov.size);
  866: 
  867: 		memset(cmp_buf, ctx->pattern, ctx->qiov.size);
  868: 		if (memcmp(ctx->buf, cmp_buf, ctx->qiov.size)) {
  869: 			printf("Pattern verification failed at offset %lld, "
  870: 				"%zd bytes\n",
  871: 				(long long) ctx->offset, ctx->qiov.size);
  872: 		}
  873: 		free(cmp_buf);
  874: 	}
  875: 
  876: 	if (ctx->qflag) {
  877: 		goto out;
  878: 	}
  879: 
  880: 	if (ctx->vflag) {
  881: 		dump_buffer(ctx->buf, ctx->offset, ctx->qiov.size);
  882: 	}
  883: 
  884: 	/* Finally, report back -- -C gives a parsable format */
  885: 	t2 = tsub(t2, ctx->t1);
  886: 	print_report("read", &t2, ctx->offset, ctx->qiov.size,
  887: 		     ctx->qiov.size, 1, ctx->Cflag);
  888: out:
  889: 	qemu_io_free(ctx->buf);
  890: 	free(ctx);
  891: }
  892: 
  893: static void
  894: aio_read_help(void)
  895: {
  896: 	printf(
  897: "\n"
  898: " asynchronously reads a range of bytes from the given offset\n"
  899: "\n"
  900: " Example:\n"
  901: " 'aio_read -v 512 1k 1k ' - dumps 2 kilobytes read from 512 bytes into the file\n"
  902: "\n"
  903: " Reads a segment of the currently open file, optionally dumping it to the\n"
  904: " standard output stream (with -v option) for subsequent inspection.\n"
  905: " The read is performed asynchronously and should the aio_flush command \n"
  906: " should be used to ensure all outstanding aio requests have been completed\n"
  907: " -C, -- report statistics in a machine parsable format\n"
  908: " -P, -- use a pattern to verify read data\n"
  909: " -v, -- dump buffer to standard output\n"
  910: " -q, -- quite mode, do not show I/O statistics\n"
  911: "\n");
  912: }
  913: 
  914: static int aio_read_f(int argc, char **argv);
  915: 
  916: static const cmdinfo_t aio_read_cmd = {
  917: 	.name		= "aio_read",
  918: 	.cfunc		= aio_read_f,
  919: 	.argmin		= 2,
  920: 	.argmax		= -1,
  921: 	.args		= "[-Cqv] [-P pattern ] off len [len..]",
  922: 	.oneline	= "asynchronously reads a number of bytes",
  923: 	.help		= aio_read_help,
  924: };
  925: 
  926: static int
  927: aio_read_f(int argc, char **argv)
  928: {
  929: 	int nr_iov, c;
  930: 	struct aio_ctx *ctx = calloc(1, sizeof(struct aio_ctx));
  931: 	BlockDriverAIOCB *acb;
  932: 
  933: 	while ((c = getopt(argc, argv, "CP:qv")) != EOF) {
  934: 		switch (c) {
  935: 		case 'C':
  936: 			ctx->Cflag = 1;
  937: 			break;
  938: 		case 'P':
  939: 			ctx->Pflag = 1;
  940: 			ctx->pattern = parse_pattern(optarg);
  941: 			if (ctx->pattern < 0)
  942: 				return 0;
  943: 			break;
  944: 		case 'q':
  945: 			ctx->qflag = 1;
  946: 			break;
  947: 		case 'v':
  948: 			ctx->vflag = 1;
  949: 			break;
  950: 		default:
  951: 			free(ctx);
  952: 			return command_usage(&aio_read_cmd);
  953: 		}
  954: 	}
  955: 
  956: 	if (optind > argc - 2) {
  957: 		free(ctx);
  958: 		return command_usage(&aio_read_cmd);
  959: 	}
  960: 
  961: 	ctx->offset = cvtnum(argv[optind]);
  962: 	if (ctx->offset < 0) {
  963: 		printf("non-numeric length argument -- %s\n", argv[optind]);
  964: 		free(ctx);
  965: 		return 0;
  966: 	}
  967: 	optind++;
  968: 
  969: 	if (ctx->offset & 0x1ff) {
  970: 		printf("offset %lld is not sector aligned\n",
  971: 			(long long)ctx->offset);
  972: 		free(ctx);
  973: 		return 0;
  974: 	}
  975: 
  976: 	nr_iov = argc - optind;
  977: 	ctx->buf = create_iovec(&ctx->qiov, &argv[optind], nr_iov, 0xab);
  978: 
  979: 	gettimeofday(&ctx->t1, NULL);
  980: 	acb = bdrv_aio_readv(bs, ctx->offset >> 9, &ctx->qiov,
  981: 			      ctx->qiov.size >> 9, aio_read_done, ctx);
  982: 	if (!acb) {
  983: 		free(ctx->buf);
  984: 		free(ctx);
  985: 		return -EIO;
  986: 	}
  987: 
  988: 	return 0;
  989: }
  990: 
  991: static void
  992: aio_write_help(void)
  993: {
  994: 	printf(
  995: "\n"
  996: " asynchronously writes a range of bytes from the given offset source \n"
  997: " from multiple buffers\n"
  998: "\n"
  999: " Example:\n"
 1000: " 'aio_write 512 1k 1k' - writes 2 kilobytes at 512 bytes into the open file\n"
 1001: "\n"
 1002: " Writes into a segment of the currently open file, using a buffer\n"
 1003: " filled with a set pattern (0xcdcdcdcd).\n"
 1004: " The write is performed asynchronously and should the aio_flush command \n"
 1005: " should be used to ensure all outstanding aio requests have been completed\n"
 1006: " -P, -- use different pattern to fill file\n"
 1007: " -C, -- report statistics in a machine parsable format\n"
 1008: " -q, -- quite mode, do not show I/O statistics\n"
 1009: "\n");
 1010: }
 1011: 
 1012: static int aio_write_f(int argc, char **argv);
 1013: 
 1014: static const cmdinfo_t aio_write_cmd = {
 1015: 	.name		= "aio_write",
 1016: 	.cfunc		= aio_write_f,
 1017: 	.argmin		= 2,
 1018: 	.argmax		= -1,
 1019: 	.args		= "[-Cq] [-P pattern ] off len [len..]",
 1020: 	.oneline	= "asynchronously writes a number of bytes",
 1021: 	.help		= aio_write_help,
 1022: };
 1023: 
 1024: static int
 1025: aio_write_f(int argc, char **argv)
 1026: {
 1027: 	int nr_iov, c;
 1028: 	int pattern = 0xcd;
 1029: 	struct aio_ctx *ctx = calloc(1, sizeof(struct aio_ctx));
 1030: 	BlockDriverAIOCB *acb;
 1031: 
 1032: 	while ((c = getopt(argc, argv, "CqP:")) != EOF) {
 1033: 		switch (c) {
 1034: 		case 'C':
 1035: 			ctx->Cflag = 1;
 1036: 			break;
 1037: 		case 'q':
 1038: 			ctx->qflag = 1;
 1039: 			break;
 1040: 		case 'P':
 1041: 			pattern = parse_pattern(optarg);
 1042: 			if (pattern < 0)
 1043: 				return 0;
 1044: 			break;
 1045: 		default:
 1046: 			free(ctx);
 1047: 			return command_usage(&aio_write_cmd);
 1048: 		}
 1049: 	}
 1050: 
 1051: 	if (optind > argc - 2) {
 1052: 		free(ctx);
 1053: 		return command_usage(&aio_write_cmd);
 1054: 	}
 1055: 
 1056: 	ctx->offset = cvtnum(argv[optind]);
 1057: 	if (ctx->offset < 0) {
 1058: 		printf("non-numeric length argument -- %s\n", argv[optind]);
 1059: 		free(ctx);
 1060: 		return 0;
 1061: 	}
 1062: 	optind++;
 1063: 
 1064: 	if (ctx->offset & 0x1ff) {
 1065: 		printf("offset %lld is not sector aligned\n",
 1066: 			(long long)ctx->offset);
 1067: 		free(ctx);
 1068: 		return 0;
 1069: 	}
 1070: 
 1071: 	nr_iov = argc - optind;
 1072: 	ctx->buf = create_iovec(&ctx->qiov, &argv[optind], nr_iov, pattern);
 1073: 
 1074: 	gettimeofday(&ctx->t1, NULL);
 1075: 	acb = bdrv_aio_writev(bs, ctx->offset >> 9, &ctx->qiov,
 1076: 			      ctx->qiov.size >> 9, aio_write_done, ctx);
 1077: 	if (!acb) {
 1078: 		free(ctx->buf);
 1079: 		free(ctx);
 1080: 		return -EIO;
 1081: 	}
 1082: 
 1083: 	return 0;
 1084: }
 1085: 
 1086: static int
 1087: aio_flush_f(int argc, char **argv)
 1088: {
 1089: 	qemu_aio_flush();
 1090: 	return 0;
 1091: }
 1092: 
 1093: static const cmdinfo_t aio_flush_cmd = {
 1094: 	.name		= "aio_flush",
 1095: 	.cfunc		= aio_flush_f,
 1096: 	.oneline	= "completes all outstanding aio requets"
 1097: };
 1098: 
 1099: static int
 1100: flush_f(int argc, char **argv)
 1101: {
 1102: 	bdrv_flush(bs);
 1103: 	return 0;
 1104: }
 1105: 
 1106: static const cmdinfo_t flush_cmd = {
 1107: 	.name		= "flush",
 1108: 	.altname	= "f",
 1109: 	.cfunc		= flush_f,
 1110: 	.oneline	= "flush all in-core file state to disk",
 1111: };
 1112: 
 1113: static int
 1114: truncate_f(int argc, char **argv)
 1115: {
 1116: 	int64_t offset;
 1117: 	int ret;
 1118: 
 1119: 	offset = cvtnum(argv[1]);
 1120: 	if (offset < 0) {
 1121: 		printf("non-numeric truncate argument -- %s\n", argv[1]);
 1122: 		return 0;
 1123: 	}
 1124: 
 1125: 	ret = bdrv_truncate(bs, offset);
 1126: 	if (ret < 0) {
 1127: 		printf("truncate: %s", strerror(ret));
 1128: 		return 0;
 1129: 	}
 1130: 
 1131: 	return 0;
 1132: }
 1133: 
 1134: static const cmdinfo_t truncate_cmd = {
 1135: 	.name		= "truncate",
 1136: 	.altname	= "t",
 1137: 	.cfunc		= truncate_f,
 1138: 	.argmin		= 1,
 1139: 	.argmax		= 1,
 1140: 	.args		= "off",
 1141: 	.oneline	= "truncates the current file at the given offset",
 1142: };
 1143: 
 1144: static int
 1145: length_f(int argc, char **argv)
 1146: {
 1147:         int64_t size;
 1148: 	char s1[64];
 1149: 
 1150: 	size = bdrv_getlength(bs);
 1151: 	if (size < 0) {
 1152: 		printf("getlength: %s", strerror(size));
 1153: 		return 0;
 1154: 	}
 1155: 
 1156: 	cvtstr(size, s1, sizeof(s1));
 1157: 	printf("%s\n", s1);
 1158: 	return 0;
 1159: }
 1160: 
 1161: 
 1162: static const cmdinfo_t length_cmd = {
 1163: 	.name		= "length",
 1164: 	.altname	= "l",
 1165: 	.cfunc		= length_f,
 1166: 	.oneline	= "gets the length of the current file",
 1167: };
 1168: 
 1169: 
 1170: static int
 1171: info_f(int argc, char **argv)
 1172: {
 1173: 	BlockDriverInfo bdi;
 1174: 	char s1[64], s2[64];
 1175: 	int ret;
 1176: 
 1177: 	if (bs->drv && bs->drv->format_name)
 1178: 		printf("format name: %s\n", bs->drv->format_name);
 1179: 	if (bs->drv && bs->drv->protocol_name)
 1180: 		printf("format name: %s\n", bs->drv->protocol_name);
 1181: 
 1182: 	ret = bdrv_get_info(bs, &bdi);
 1183: 	if (ret)
 1184: 		return 0;
 1185: 
 1186: 	cvtstr(bdi.cluster_size, s1, sizeof(s1));
 1187: 	cvtstr(bdi.vm_state_offset, s2, sizeof(s2));
 1188: 
 1189: 	printf("cluster size: %s\n", s1);
 1190: 	printf("vm state offset: %s\n", s2);
 1191: 
 1192: 	return 0;
 1193: }
 1194: 
 1195: 
 1196: 
 1197: static const cmdinfo_t info_cmd = {
 1198: 	.name		= "info",
 1199: 	.altname	= "i",
 1200: 	.cfunc		= info_f,
 1201: 	.oneline	= "prints information about the current file",
 1202: };
 1203: 
 1204: static int
 1205: alloc_f(int argc, char **argv)
 1206: {
 1207: 	int64_t offset;
 1208: 	int nb_sectors, remaining;
 1209: 	char s1[64];
 1210: 	int num, sum_alloc;
 1211: 	int ret;
 1212: 
 1213: 	offset = cvtnum(argv[1]);
 1214: 	if (offset & 0x1ff) {
 1215: 		printf("offset %lld is not sector aligned\n",
 1216: 			(long long)offset);
 1217: 		return 0;
 1218: 	}
 1219: 
 1220: 	if (argc == 3)
 1221: 		nb_sectors = cvtnum(argv[2]);
 1222: 	else
 1223: 		nb_sectors = 1;
 1224: 
 1225: 	remaining = nb_sectors;
 1226: 	sum_alloc = 0;
 1227: 	while (remaining) {
 1228: 		ret = bdrv_is_allocated(bs, offset >> 9, nb_sectors, &num);
 1229: 		remaining -= num;
 1230: 		if (ret) {
 1231: 			sum_alloc += num;
 1232: 		}
 1233: 	}
 1234: 
 1235: 	cvtstr(offset, s1, sizeof(s1));
 1236: 
 1237: 	if (nb_sectors == 1)
 1238: 		printf("sector allocated at offset %s\n", s1);
 1239: 	else
 1240: 		printf("%d/%d sectors allocated at offset %s\n",
 1241: 			sum_alloc, nb_sectors, s1);
 1242: 	return 0;
 1243: }
 1244: 
 1245: static const cmdinfo_t alloc_cmd = {
 1246: 	.name		= "alloc",
 1247: 	.altname	= "a",
 1248: 	.argmin		= 1,
 1249: 	.argmax		= 2,
 1250: 	.cfunc		= alloc_f,
 1251: 	.args		= "off [sectors]",
 1252: 	.oneline	= "checks if a sector is present in the file",
 1253: };
 1254: 
 1255: static int
 1256: close_f(int argc, char **argv)
 1257: {
 1258: 	bdrv_close(bs);
 1259: 	bs = NULL;
 1260: 	return 0;
 1261: }
 1262: 
 1263: static const cmdinfo_t close_cmd = {
 1264: 	.name		= "close",
 1265: 	.altname	= "c",
 1266: 	.cfunc		= close_f,
 1267: 	.oneline	= "close the current open file",
 1268: };
 1269: 
 1270: static int openfile(char *name, int flags, int growable)
 1271: {
 1272: 	if (bs) {
 1273: 		fprintf(stderr, "file open already, try 'help close'\n");
 1274: 		return 1;
 1275: 	}
 1276: 
 1277: 	bs = bdrv_new("hda");
 1278: 	if (!bs)
 1279: 		return 1;
 1280: 
 1281: 	if (growable) {
 1282: 		flags |= BDRV_O_FILE;
 1283: 	}
 1284: 
 1285: 	if (bdrv_open(bs, name, flags) == -1) {
 1286: 		fprintf(stderr, "%s: can't open device %s\n", progname, name);
 1287: 		bs = NULL;
 1288: 		return 1;
 1289: 	}
 1290: 
 1291: 	if (growable) {
 1292: 		bs->growable = 1;
 1293: 	}
 1294: 	return 0;
 1295: }
 1296: 
 1297: static void
 1298: open_help(void)
 1299: {
 1300: 	printf(
 1301: "\n"
 1302: " opens a new file in the requested mode\n"
 1303: "\n"
 1304: " Example:\n"
 1305: " 'open -Cn /tmp/data' - creates/opens data file read-write and uncached\n"
 1306: "\n"
 1307: " Opens a file for subsequent use by all of the other qemu-io commands.\n"
 1308: " -C, -- create new file if it doesn't exist\n"
 1309: " -r, -- open file read-only\n"
 1310: " -s, -- use snapshot file\n"
 1311: " -n, -- disable host cache\n"
 1312: " -g, -- allow file to grow (only applies to protocols)"
 1313: "\n");
 1314: }
 1315: 
 1316: static int open_f(int argc, char **argv);
 1317: 
 1318: static const cmdinfo_t open_cmd = {
 1319: 	.name		= "open",
 1320: 	.altname	= "o",
 1321: 	.cfunc		= open_f,
 1322: 	.argmin		= 1,
 1323: 	.argmax		= -1,
 1324: 	.flags		= CMD_NOFILE_OK,
 1325: 	.args		= "[-Crsn] [path]",
 1326: 	.oneline	= "open the file specified by path",
 1327: 	.help		= open_help,
 1328: };
 1329: 
 1330: static int
 1331: open_f(int argc, char **argv)
 1332: {
 1333: 	int flags = 0;
 1334: 	int readonly = 0;
 1335: 	int growable = 0;
 1336: 	int c;
 1337: 
 1338: 	while ((c = getopt(argc, argv, "snCrg")) != EOF) {
 1339: 		switch (c) {
 1340: 		case 's':
 1341: 			flags |= BDRV_O_SNAPSHOT;
 1342: 			break;
 1343: 		case 'n':
 1344: 			flags |= BDRV_O_NOCACHE;
 1345: 			break;
 1346: 		case 'C':
 1347: 			flags |= BDRV_O_CREAT;
 1348: 			break;
 1349: 		case 'r':
 1350: 			readonly = 1;
 1351: 			break;
 1352: 		case 'g':
 1353: 			growable = 1;
 1354: 			break;
 1355: 		default:
 1356: 			return command_usage(&open_cmd);
 1357: 		}
 1358: 	}
 1359: 
 1360: 	if (readonly)
 1361: 		flags |= BDRV_O_RDONLY;
 1362: 	else
 1363: 		flags |= BDRV_O_RDWR;
 1364: 
 1365: 	if (optind != argc - 1)
 1366: 		return command_usage(&open_cmd);
 1367: 
 1368: 	return openfile(argv[optind], flags, growable);
 1369: }
 1370: 
 1371: static int
 1372: init_args_command(
 1373:         int     index)
 1374: {
 1375: 	/* only one device allowed so far */
 1376: 	if (index >= 1)
 1377: 		return 0;
 1378: 	return ++index;
 1379: }
 1380: 
 1381: static int
 1382: init_check_command(
 1383: 	const cmdinfo_t *ct)
 1384: {
 1385: 	if (ct->flags & CMD_FLAG_GLOBAL)
 1386: 		return 1;
 1387: 	if (!(ct->flags & CMD_NOFILE_OK) && !bs) {
 1388: 		fprintf(stderr, "no file open, try 'help open'\n");
 1389: 		return 0;
 1390: 	}
 1391: 	return 1;
 1392: }
 1393: 
 1394: static void usage(const char *name)
 1395: {
 1396: 	printf(
 1397: "Usage: %s [-h] [-V] [-Crsnm] [-c cmd] ... [file]\n"
 1398: "QEMU Disk exerciser\n"
 1399: "\n"
 1400: "  -C, --create         create new file if it doesn't exist\n"
 1401: "  -c, --cmd            command to execute\n"
 1402: "  -r, --read-only      export read-only\n"
 1403: "  -s, --snapshot       use snapshot file\n"
 1404: "  -n, --nocache        disable host cache\n"
 1405: "  -g, --growable       allow file to grow (only applies to protocols)\n"
 1406: "  -m, --misalign       misalign allocations for O_DIRECT\n"
 1407: "  -k, --native-aio     use kernel AIO implementation (on Linux only)\n"
 1408: "  -h, --help           display this help and exit\n"
 1409: "  -V, --version        output version information and exit\n"
 1410: "\n",
 1411: 	name);
 1412: }
 1413: 
 1414: 
 1415: int main(int argc, char **argv)
 1416: {
 1417: 	int readonly = 0;
 1418: 	int growable = 0;
 1419: 	const char *sopt = "hVc:Crsnmgk";
 1420: 	struct option lopt[] = {
 1421: 		{ "help", 0, NULL, 'h' },
 1422: 		{ "version", 0, NULL, 'V' },
 1423: 		{ "offset", 1, NULL, 'o' },
 1424: 		{ "cmd", 1, NULL, 'c' },
 1425: 		{ "create", 0, NULL, 'C' },
 1426: 		{ "read-only", 0, NULL, 'r' },
 1427: 		{ "snapshot", 0, NULL, 's' },
 1428: 		{ "nocache", 0, NULL, 'n' },
 1429: 		{ "misalign", 0, NULL, 'm' },
 1430: 		{ "growable", 0, NULL, 'g' },
 1431: 		{ "native-aio", 0, NULL, 'k' },
 1432: 		{ NULL, 0, NULL, 0 }
 1433: 	};
 1434: 	int c;
 1435: 	int opt_index = 0;
 1436: 	int flags = 0;
 1437: 
 1438: 	progname = basename(argv[0]);
 1439: 
 1440: 	while ((c = getopt_long(argc, argv, sopt, lopt, &opt_index)) != -1) {
 1441: 		switch (c) {
 1442: 		case 's':
 1443: 			flags |= BDRV_O_SNAPSHOT;
 1444: 			break;
 1445: 		case 'n':
 1446: 			flags |= BDRV_O_NOCACHE;
 1447: 			break;
 1448: 		case 'c':
 1449: 			add_user_command(optarg);
 1450: 			break;
 1451: 		case 'C':
 1452: 			flags |= BDRV_O_CREAT;
 1453: 			break;
 1454: 		case 'r':
 1455: 			readonly = 1;
 1456: 			break;
 1457: 		case 'm':
 1458: 			misalign = 1;
 1459: 			break;
 1460: 		case 'g':
 1461: 			growable = 1;
 1462: 			break;
 1463: 		case 'k':
 1464: 			flags |= BDRV_O_NATIVE_AIO;
 1465: 			break;
 1466: 		case 'V':
 1467: 			printf("%s version %s\n", progname, VERSION);
 1468: 			exit(0);
 1469: 		case 'h':
 1470: 			usage(progname);
 1471: 			exit(0);
 1472: 		default:
 1473: 			usage(progname);
 1474: 			exit(1);
 1475: 		}
 1476: 	}
 1477: 
 1478: 	if ((argc - optind) > 1) {
 1479: 		usage(progname);
 1480: 		exit(1);
 1481: 	}
 1482: 
 1483: 	bdrv_init();
 1484: 
 1485: 	/* initialize commands */
 1486: 	quit_init();
 1487: 	help_init();
 1488: 	add_command(&open_cmd);
 1489: 	add_command(&close_cmd);
 1490: 	add_command(&read_cmd);
 1491: 	add_command(&readv_cmd);
 1492: 	add_command(&write_cmd);
 1493: 	add_command(&writev_cmd);
 1494: 	add_command(&aio_read_cmd);
 1495: 	add_command(&aio_write_cmd);
 1496: 	add_command(&aio_flush_cmd);
 1497: 	add_command(&flush_cmd);
 1498: 	add_command(&truncate_cmd);
 1499: 	add_command(&length_cmd);
 1500: 	add_command(&info_cmd);
 1501: 	add_command(&alloc_cmd);
 1502: 
 1503: 	add_args_command(init_args_command);
 1504: 	add_check_command(init_check_command);
 1505: 
 1506: 	/* open the device */
 1507: 	if (readonly)
 1508: 		flags |= BDRV_O_RDONLY;
 1509: 	else
 1510: 		flags |= BDRV_O_RDWR;
 1511: 
 1512: 	if ((argc - optind) == 1)
 1513: 		openfile(argv[optind], flags, growable);
 1514: 	command_loop();
 1515: 
 1516: 	/*
 1517: 	 * Make sure all outstanding requests get flushed the program exits.
 1518: 	 */
 1519: 	qemu_aio_flush();
 1520: 
 1521: 	if (bs)
 1522: 		bdrv_close(bs);
 1523: 	return 0;
 1524: }

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