qemu-io.c 43.9 KB
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/*
 * Command line utility to exercise the QEMU I/O path.
 *
 * Copyright (C) 2009 Red Hat, Inc.
 * Copyright (c) 2003-2005 Silicon Graphics, Inc.
 *
 * This work is licensed under the terms of the GNU GPL, version 2 or later.
 * See the COPYING file in the top-level directory.
 */
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#include <sys/time.h>
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#include <sys/types.h>
#include <stdarg.h>
#include <stdio.h>
#include <getopt.h>
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#include <libgen.h>
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#include "qemu-common.h"
#include "block_int.h"
#include "cmd.h"

#define VERSION	"0.0.1"

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#define CMD_NOFILE_OK   0x01
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char *progname;
static BlockDriverState *bs;

static int misalign;

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/*
 * Parse the pattern argument to various sub-commands.
 *
 * Because the pattern is used as an argument to memset it must evaluate
 * to an unsigned integer that fits into a single byte.
 */
static int parse_pattern(const char *arg)
{
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    char *endptr = NULL;
    long pattern;
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    pattern = strtol(arg, &endptr, 0);
    if (pattern < 0 || pattern > UCHAR_MAX || *endptr != '\0') {
        printf("%s is not a valid pattern byte\n", arg);
        return -1;
    }
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    return pattern;
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}

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/*
 * Memory allocation helpers.
 *
 * Make sure memory is aligned by default, or purposefully misaligned if
 * that is specified on the command line.
 */

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#define MISALIGN_OFFSET     16
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static void *qemu_io_alloc(size_t len, int pattern)
{
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    void *buf;

    if (misalign) {
        len += MISALIGN_OFFSET;
    }
    buf = qemu_blockalign(bs, len);
    memset(buf, pattern, len);
    if (misalign) {
        buf += MISALIGN_OFFSET;
    }
    return buf;
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}

static void qemu_io_free(void *p)
{
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    if (misalign) {
        p -= MISALIGN_OFFSET;
    }
    qemu_vfree(p);
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}

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static void dump_buffer(const void *buffer, int64_t offset, int len)
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{
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    int i, j;
    const uint8_t *p;

    for (i = 0, p = buffer; i < len; i += 16) {
        const uint8_t *s = p;

        printf("%08" PRIx64 ":  ", offset + i);
        for (j = 0; j < 16 && i + j < len; j++, p++) {
            printf("%02x ", *p);
        }
        printf(" ");
        for (j = 0; j < 16 && i + j < len; j++, s++) {
            if (isalnum(*s)) {
                printf("%c", *s);
            } else {
                printf(".");
            }
        }
        printf("\n");
    }
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}

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static void print_report(const char *op, struct timeval *t, int64_t offset,
                         int count, int total, int cnt, int Cflag)
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{
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    char s1[64], s2[64], ts[64];

    timestr(t, ts, sizeof(ts), Cflag ? VERBOSE_FIXED_TIME : 0);
    if (!Cflag) {
        cvtstr((double)total, s1, sizeof(s1));
        cvtstr(tdiv((double)total, *t), s2, sizeof(s2));
        printf("%s %d/%d bytes at offset %" PRId64 "\n",
               op, total, count, offset);
        printf("%s, %d ops; %s (%s/sec and %.4f ops/sec)\n",
               s1, cnt, ts, s2, tdiv((double)cnt, *t));
    } else {/* bytes,ops,time,bytes/sec,ops/sec */
        printf("%d,%d,%s,%.3f,%.3f\n",
            total, cnt, ts,
            tdiv((double)total, *t),
            tdiv((double)cnt, *t));
    }
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}

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/*
 * Parse multiple length statements for vectored I/O, and construct an I/O
 * vector matching it.
 */
static void *
create_iovec(QEMUIOVector *qiov, char **argv, int nr_iov, int pattern)
{
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    size_t *sizes = calloc(nr_iov, sizeof(size_t));
    size_t count = 0;
    void *buf = NULL;
    void *p;
    int i;

    for (i = 0; i < nr_iov; i++) {
        char *arg = argv[i];
        int64_t len;

        len = cvtnum(arg);
        if (len < 0) {
            printf("non-numeric length argument -- %s\n", arg);
            goto fail;
        }

        /* should be SIZE_T_MAX, but that doesn't exist */
        if (len > INT_MAX) {
            printf("too large length argument -- %s\n", arg);
            goto fail;
        }

        if (len & 0x1ff) {
            printf("length argument %" PRId64
                   " is not sector aligned\n", len);
            goto fail;
        }

        sizes[i] = len;
        count += len;
    }

    qemu_iovec_init(qiov, nr_iov);

    buf = p = qemu_io_alloc(count, pattern);

    for (i = 0; i < nr_iov; i++) {
        qemu_iovec_add(qiov, p, sizes[i]);
        p += sizes[i];
    }
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fail:
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    free(sizes);
    return buf;
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}

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static int do_read(char *buf, int64_t offset, int count, int *total)
{
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    int ret;
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    ret = bdrv_read(bs, offset >> 9, (uint8_t *)buf, count >> 9);
    if (ret < 0) {
        return ret;
    }
    *total = count;
    return 1;
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}

static int do_write(char *buf, int64_t offset, int count, int *total)
{
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    int ret;
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    ret = bdrv_write(bs, offset >> 9, (uint8_t *)buf, count >> 9);
    if (ret < 0) {
        return ret;
    }
    *total = count;
    return 1;
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}

static int do_pread(char *buf, int64_t offset, int count, int *total)
{
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    *total = bdrv_pread(bs, offset, (uint8_t *)buf, count);
    if (*total < 0) {
        return *total;
    }
    return 1;
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}

static int do_pwrite(char *buf, int64_t offset, int count, int *total)
{
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    *total = bdrv_pwrite(bs, offset, (uint8_t *)buf, count);
    if (*total < 0) {
        return *total;
    }
    return 1;
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}

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static int do_load_vmstate(char *buf, int64_t offset, int count, int *total)
{
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    *total = bdrv_load_vmstate(bs, (uint8_t *)buf, offset, count);
    if (*total < 0) {
        return *total;
    }
    return 1;
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}

static int do_save_vmstate(char *buf, int64_t offset, int count, int *total)
{
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    *total = bdrv_save_vmstate(bs, (uint8_t *)buf, offset, count);
    if (*total < 0) {
        return *total;
    }
    return 1;
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}

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#define NOT_DONE 0x7fffffff
static void aio_rw_done(void *opaque, int ret)
{
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    *(int *)opaque = ret;
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}

static int do_aio_readv(QEMUIOVector *qiov, int64_t offset, int *total)
{
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    BlockDriverAIOCB *acb;
    int async_ret = NOT_DONE;
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    acb = bdrv_aio_readv(bs, offset >> 9, qiov, qiov->size >> 9,
                         aio_rw_done, &async_ret);
    if (!acb) {
        return -EIO;
    }
    while (async_ret == NOT_DONE) {
        qemu_aio_wait();
    }
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    *total = qiov->size;
    return async_ret < 0 ? async_ret : 1;
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}

static int do_aio_writev(QEMUIOVector *qiov, int64_t offset, int *total)
{
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    BlockDriverAIOCB *acb;
    int async_ret = NOT_DONE;
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    acb = bdrv_aio_writev(bs, offset >> 9, qiov, qiov->size >> 9,
                          aio_rw_done, &async_ret);
    if (!acb) {
        return -EIO;
    }
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    while (async_ret == NOT_DONE) {
        qemu_aio_wait();
    }
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    *total = qiov->size;
    return async_ret < 0 ? async_ret : 1;
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}

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struct multiwrite_async_ret {
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    int num_done;
    int error;
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};

static void multiwrite_cb(void *opaque, int ret)
{
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    struct multiwrite_async_ret *async_ret = opaque;
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    async_ret->num_done++;
    if (ret < 0) {
        async_ret->error = ret;
    }
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}

static int do_aio_multiwrite(BlockRequest* reqs, int num_reqs, int *total)
{
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    int i, ret;
    struct multiwrite_async_ret async_ret = {
        .num_done = 0,
        .error = 0,
    };

    *total = 0;
    for (i = 0; i < num_reqs; i++) {
        reqs[i].cb = multiwrite_cb;
        reqs[i].opaque = &async_ret;
        *total += reqs[i].qiov->size;
    }

    ret = bdrv_aio_multiwrite(bs, reqs, num_reqs);
    if (ret < 0) {
        return ret;
    }

    while (async_ret.num_done < num_reqs) {
        qemu_aio_wait();
    }

    return async_ret.error < 0 ? async_ret.error : 1;
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}
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static void read_help(void)
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{
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    printf(
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"\n"
" reads a range of bytes from the given offset\n"
"\n"
" Example:\n"
" 'read -v 512 1k' - dumps 1 kilobyte read from 512 bytes into the file\n"
"\n"
" Reads a segment of the currently open file, optionally dumping it to the\n"
" standard output stream (with -v option) for subsequent inspection.\n"
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" -b, -- read from the VM state rather than the virtual disk\n"
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" -C, -- report statistics in a machine parsable format\n"
" -l, -- length for pattern verification (only with -P)\n"
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" -p, -- use bdrv_pread to read the file\n"
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" -P, -- use a pattern to verify read data\n"
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" -q, -- quiet mode, do not show I/O statistics\n"
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" -s, -- start offset for pattern verification (only with -P)\n"
" -v, -- dump buffer to standard output\n"
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"\n");
}

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static int read_f(int argc, char **argv);

static const cmdinfo_t read_cmd = {
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    .name       = "read",
    .altname    = "r",
    .cfunc      = read_f,
    .argmin     = 2,
    .argmax     = -1,
    .args       = "[-abCpqv] [-P pattern [-s off] [-l len]] off len",
    .oneline    = "reads a number of bytes at a specified offset",
    .help       = read_help,
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};

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static int read_f(int argc, char **argv)
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{
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    struct timeval t1, t2;
    int Cflag = 0, pflag = 0, qflag = 0, vflag = 0;
    int Pflag = 0, sflag = 0, lflag = 0, bflag = 0;
    int c, cnt;
    char *buf;
    int64_t offset;
    int count;
    /* Some compilers get confused and warn if this is not initialized.  */
    int total = 0;
    int pattern = 0, pattern_offset = 0, pattern_count = 0;

    while ((c = getopt(argc, argv, "bCl:pP:qs:v")) != EOF) {
        switch (c) {
        case 'b':
            bflag = 1;
            break;
        case 'C':
            Cflag = 1;
            break;
        case 'l':
            lflag = 1;
            pattern_count = cvtnum(optarg);
            if (pattern_count < 0) {
                printf("non-numeric length argument -- %s\n", optarg);
                return 0;
            }
            break;
        case 'p':
            pflag = 1;
            break;
        case 'P':
            Pflag = 1;
            pattern = parse_pattern(optarg);
            if (pattern < 0) {
                return 0;
            }
            break;
        case 'q':
            qflag = 1;
            break;
        case 's':
            sflag = 1;
            pattern_offset = cvtnum(optarg);
            if (pattern_offset < 0) {
                printf("non-numeric length argument -- %s\n", optarg);
                return 0;
            }
            break;
        case 'v':
            vflag = 1;
            break;
        default:
            return command_usage(&read_cmd);
        }
    }

    if (optind != argc - 2) {
        return command_usage(&read_cmd);
    }

    if (bflag && pflag) {
        printf("-b and -p cannot be specified at the same time\n");
        return 0;
    }

    offset = cvtnum(argv[optind]);
    if (offset < 0) {
        printf("non-numeric length argument -- %s\n", argv[optind]);
        return 0;
    }

    optind++;
    count = cvtnum(argv[optind]);
    if (count < 0) {
        printf("non-numeric length argument -- %s\n", argv[optind]);
        return 0;
    }
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    if (!Pflag && (lflag || sflag)) {
        return command_usage(&read_cmd);
    }

    if (!lflag) {
        pattern_count = count - pattern_offset;
    }

    if ((pattern_count < 0) || (pattern_count + pattern_offset > count))  {
        printf("pattern verfication range exceeds end of read data\n");
        return 0;
    }

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    if (!pflag) {
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        if (offset & 0x1ff) {
            printf("offset %" PRId64 " is not sector aligned\n",
                   offset);
            return 0;
        }
        if (count & 0x1ff) {
            printf("count %d is not sector aligned\n",
                   count);
            return 0;
        }
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    }
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    buf = qemu_io_alloc(count, 0xab);

    gettimeofday(&t1, NULL);
    if (pflag) {
        cnt = do_pread(buf, offset, count, &total);
    } else if (bflag) {
        cnt = do_load_vmstate(buf, offset, count, &total);
    } else {
        cnt = do_read(buf, offset, count, &total);
    }
    gettimeofday(&t2, NULL);

    if (cnt < 0) {
        printf("read failed: %s\n", strerror(-cnt));
        goto out;
    }

    if (Pflag) {
        void *cmp_buf = malloc(pattern_count);
        memset(cmp_buf, pattern, pattern_count);
        if (memcmp(buf + pattern_offset, cmp_buf, pattern_count)) {
            printf("Pattern verification failed at offset %"
                   PRId64 ", %d bytes\n",
                   offset + pattern_offset, pattern_count);
        }
        free(cmp_buf);
    }

    if (qflag) {
        goto out;
    }

    if (vflag) {
        dump_buffer(buf, offset, count);
    }

    /* Finally, report back -- -C gives a parsable format */
    t2 = tsub(t2, t1);
    print_report("read", &t2, offset, count, total, cnt, Cflag);
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out:
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    qemu_io_free(buf);
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    return 0;
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}

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static void readv_help(void)
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{
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    printf(
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"\n"
" reads a range of bytes from the given offset into multiple buffers\n"
"\n"
" Example:\n"
" 'readv -v 512 1k 1k ' - dumps 2 kilobytes read from 512 bytes into the file\n"
"\n"
" Reads a segment of the currently open file, optionally dumping it to the\n"
" standard output stream (with -v option) for subsequent inspection.\n"
" Uses multiple iovec buffers if more than one byte range is specified.\n"
" -C, -- report statistics in a machine parsable format\n"
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" -P, -- use a pattern to verify read data\n"
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" -v, -- dump buffer to standard output\n"
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" -q, -- quiet mode, do not show I/O statistics\n"
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"\n");
}

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static int readv_f(int argc, char **argv);

static const cmdinfo_t readv_cmd = {
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    .name       = "readv",
    .cfunc      = readv_f,
    .argmin     = 2,
    .argmax     = -1,
    .args       = "[-Cqv] [-P pattern ] off len [len..]",
    .oneline    = "reads a number of bytes at a specified offset",
    .help       = readv_help,
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};

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static int readv_f(int argc, char **argv)
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{
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    struct timeval t1, t2;
    int Cflag = 0, qflag = 0, vflag = 0;
    int c, cnt;
    char *buf;
    int64_t offset;
    /* Some compilers get confused and warn if this is not initialized.  */
    int total = 0;
    int nr_iov;
    QEMUIOVector qiov;
    int pattern = 0;
    int Pflag = 0;

    while ((c = getopt(argc, argv, "CP:qv")) != EOF) {
        switch (c) {
        case 'C':
            Cflag = 1;
            break;
        case 'P':
            Pflag = 1;
            pattern = parse_pattern(optarg);
            if (pattern < 0) {
                return 0;
            }
            break;
        case 'q':
            qflag = 1;
            break;
        case 'v':
            vflag = 1;
            break;
        default:
            return command_usage(&readv_cmd);
        }
    }

    if (optind > argc - 2) {
        return command_usage(&readv_cmd);
    }


    offset = cvtnum(argv[optind]);
    if (offset < 0) {
        printf("non-numeric length argument -- %s\n", argv[optind]);
        return 0;
    }
    optind++;

    if (offset & 0x1ff) {
        printf("offset %" PRId64 " is not sector aligned\n",
               offset);
        return 0;
    }

    nr_iov = argc - optind;
    buf = create_iovec(&qiov, &argv[optind], nr_iov, 0xab);
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    if (buf == NULL) {
        return 0;
    }
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    gettimeofday(&t1, NULL);
    cnt = do_aio_readv(&qiov, offset, &total);
    gettimeofday(&t2, NULL);

    if (cnt < 0) {
        printf("readv failed: %s\n", strerror(-cnt));
        goto out;
    }

    if (Pflag) {
        void *cmp_buf = malloc(qiov.size);
        memset(cmp_buf, pattern, qiov.size);
        if (memcmp(buf, cmp_buf, qiov.size)) {
            printf("Pattern verification failed at offset %"
                   PRId64 ", %zd bytes\n", offset, qiov.size);
        }
        free(cmp_buf);
    }

    if (qflag) {
        goto out;
    }

    if (vflag) {
        dump_buffer(buf, offset, qiov.size);
    }

    /* Finally, report back -- -C gives a parsable format */
    t2 = tsub(t2, t1);
    print_report("read", &t2, offset, qiov.size, total, cnt, Cflag);
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out:
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    qemu_io_free(buf);
    return 0;
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}

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static void write_help(void)
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{
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    printf(
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"\n"
" writes a range of bytes from the given offset\n"
"\n"
" Example:\n"
" 'write 512 1k' - writes 1 kilobyte at 512 bytes into the open file\n"
"\n"
" Writes into a segment of the currently open file, using a buffer\n"
" filled with a set pattern (0xcdcdcdcd).\n"
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" -b, -- write to the VM state rather than the virtual disk\n"
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" -p, -- use bdrv_pwrite to write the file\n"
" -P, -- use different pattern to fill file\n"
" -C, -- report statistics in a machine parsable format\n"
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" -q, -- quiet mode, do not show I/O statistics\n"
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"\n");
}

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static int write_f(int argc, char **argv);

static const cmdinfo_t write_cmd = {
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    .name       = "write",
    .altname    = "w",
    .cfunc      = write_f,
    .argmin     = 2,
    .argmax     = -1,
    .args       = "[-abCpq] [-P pattern ] off len",
    .oneline    = "writes a number of bytes at a specified offset",
    .help       = write_help,
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669 670
};

D
Devin Nakamura 已提交
671
static int write_f(int argc, char **argv)
672
{
D
Devin Nakamura 已提交
673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767
    struct timeval t1, t2;
    int Cflag = 0, pflag = 0, qflag = 0, bflag = 0;
    int c, cnt;
    char *buf;
    int64_t offset;
    int count;
    /* Some compilers get confused and warn if this is not initialized.  */
    int total = 0;
    int pattern = 0xcd;

    while ((c = getopt(argc, argv, "bCpP:q")) != EOF) {
        switch (c) {
        case 'b':
            bflag = 1;
            break;
        case 'C':
            Cflag = 1;
            break;
        case 'p':
            pflag = 1;
            break;
        case 'P':
            pattern = parse_pattern(optarg);
            if (pattern < 0) {
                return 0;
            }
            break;
        case 'q':
            qflag = 1;
            break;
        default:
            return command_usage(&write_cmd);
        }
    }

    if (optind != argc - 2) {
        return command_usage(&write_cmd);
    }

    if (bflag && pflag) {
        printf("-b and -p cannot be specified at the same time\n");
        return 0;
    }

    offset = cvtnum(argv[optind]);
    if (offset < 0) {
        printf("non-numeric length argument -- %s\n", argv[optind]);
        return 0;
    }

    optind++;
    count = cvtnum(argv[optind]);
    if (count < 0) {
        printf("non-numeric length argument -- %s\n", argv[optind]);
        return 0;
    }

    if (!pflag) {
        if (offset & 0x1ff) {
            printf("offset %" PRId64 " is not sector aligned\n",
                   offset);
            return 0;
        }

        if (count & 0x1ff) {
            printf("count %d is not sector aligned\n",
                   count);
            return 0;
        }
    }

    buf = qemu_io_alloc(count, pattern);

    gettimeofday(&t1, NULL);
    if (pflag) {
        cnt = do_pwrite(buf, offset, count, &total);
    } else if (bflag) {
        cnt = do_save_vmstate(buf, offset, count, &total);
    } else {
        cnt = do_write(buf, offset, count, &total);
    }
    gettimeofday(&t2, NULL);

    if (cnt < 0) {
        printf("write failed: %s\n", strerror(-cnt));
        goto out;
    }

    if (qflag) {
        goto out;
    }

    /* Finally, report back -- -C gives a parsable format */
    t2 = tsub(t2, t1);
    print_report("wrote", &t2, offset, count, total, cnt, Cflag);
768

K
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769
out:
D
Devin Nakamura 已提交
770
    qemu_io_free(buf);
771

D
Devin Nakamura 已提交
772
    return 0;
773 774 775 776 777
}

static void
writev_help(void)
{
D
Devin Nakamura 已提交
778
    printf(
779 780 781 782 783 784 785 786 787 788
"\n"
" writes a range of bytes from the given offset source from multiple buffers\n"
"\n"
" Example:\n"
" 'write 512 1k 1k' - writes 2 kilobytes at 512 bytes into the open file\n"
"\n"
" Writes into a segment of the currently open file, using a buffer\n"
" filled with a set pattern (0xcdcdcdcd).\n"
" -P, -- use different pattern to fill file\n"
" -C, -- report statistics in a machine parsable format\n"
K
Kevin Wolf 已提交
789
" -q, -- quiet mode, do not show I/O statistics\n"
790 791 792
"\n");
}

B
Blue Swirl 已提交
793 794 795
static int writev_f(int argc, char **argv);

static const cmdinfo_t writev_cmd = {
D
Devin Nakamura 已提交
796 797 798 799 800 801 802
    .name       = "writev",
    .cfunc      = writev_f,
    .argmin     = 2,
    .argmax     = -1,
    .args       = "[-Cq] [-P pattern ] off len [len..]",
    .oneline    = "writes a number of bytes at a specified offset",
    .help       = writev_help,
B
Blue Swirl 已提交
803 804
};

D
Devin Nakamura 已提交
805
static int writev_f(int argc, char **argv)
806
{
D
Devin Nakamura 已提交
807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855
    struct timeval t1, t2;
    int Cflag = 0, qflag = 0;
    int c, cnt;
    char *buf;
    int64_t offset;
    /* Some compilers get confused and warn if this is not initialized.  */
    int total = 0;
    int nr_iov;
    int pattern = 0xcd;
    QEMUIOVector qiov;

    while ((c = getopt(argc, argv, "CqP:")) != EOF) {
        switch (c) {
        case 'C':
            Cflag = 1;
            break;
        case 'q':
            qflag = 1;
            break;
        case 'P':
            pattern = parse_pattern(optarg);
            if (pattern < 0) {
                return 0;
            }
            break;
        default:
            return command_usage(&writev_cmd);
        }
    }

    if (optind > argc - 2) {
        return command_usage(&writev_cmd);
    }

    offset = cvtnum(argv[optind]);
    if (offset < 0) {
        printf("non-numeric length argument -- %s\n", argv[optind]);
        return 0;
    }
    optind++;

    if (offset & 0x1ff) {
        printf("offset %" PRId64 " is not sector aligned\n",
               offset);
        return 0;
    }

    nr_iov = argc - optind;
    buf = create_iovec(&qiov, &argv[optind], nr_iov, pattern);
K
Kevin Wolf 已提交
856 857 858
    if (buf == NULL) {
        return 0;
    }
D
Devin Nakamura 已提交
859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875

    gettimeofday(&t1, NULL);
    cnt = do_aio_writev(&qiov, offset, &total);
    gettimeofday(&t2, NULL);

    if (cnt < 0) {
        printf("writev failed: %s\n", strerror(-cnt));
        goto out;
    }

    if (qflag) {
        goto out;
    }

    /* Finally, report back -- -C gives a parsable format */
    t2 = tsub(t2, t1);
    print_report("wrote", &t2, offset, qiov.size, total, cnt, Cflag);
K
Kevin Wolf 已提交
876
out:
D
Devin Nakamura 已提交
877 878
    qemu_io_free(buf);
    return 0;
879 880
}

D
Devin Nakamura 已提交
881
static void multiwrite_help(void)
K
Kevin Wolf 已提交
882
{
D
Devin Nakamura 已提交
883
    printf(
K
Kevin Wolf 已提交
884 885 886 887 888
"\n"
" writes a range of bytes from the given offset source from multiple buffers,\n"
" in a batch of requests that may be merged by qemu\n"
"\n"
" Example:\n"
889
" 'multiwrite 512 1k 1k ; 4k 1k'\n"
K
Kevin Wolf 已提交
890 891 892 893 894 895 896 897 898 899 900 901 902 903
"  writes 2 kB at 512 bytes and 1 kB at 4 kB into the open file\n"
"\n"
" Writes into a segment of the currently open file, using a buffer\n"
" filled with a set pattern (0xcdcdcdcd). The pattern byte is increased\n"
" by one for each request contained in the multiwrite command.\n"
" -P, -- use different pattern to fill file\n"
" -C, -- report statistics in a machine parsable format\n"
" -q, -- quiet mode, do not show I/O statistics\n"
"\n");
}

static int multiwrite_f(int argc, char **argv);

static const cmdinfo_t multiwrite_cmd = {
D
Devin Nakamura 已提交
904 905 906 907 908 909 910
    .name       = "multiwrite",
    .cfunc      = multiwrite_f,
    .argmin     = 2,
    .argmax     = -1,
    .args       = "[-Cq] [-P pattern ] off len [len..] [; off len [len..]..]",
    .oneline    = "issues multiple write requests at once",
    .help       = multiwrite_help,
K
Kevin Wolf 已提交
911 912
};

D
Devin Nakamura 已提交
913
static int multiwrite_f(int argc, char **argv)
K
Kevin Wolf 已提交
914
{
D
Devin Nakamura 已提交
915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958
    struct timeval t1, t2;
    int Cflag = 0, qflag = 0;
    int c, cnt;
    char **buf;
    int64_t offset, first_offset = 0;
    /* Some compilers get confused and warn if this is not initialized.  */
    int total = 0;
    int nr_iov;
    int nr_reqs;
    int pattern = 0xcd;
    QEMUIOVector *qiovs;
    int i;
    BlockRequest *reqs;

    while ((c = getopt(argc, argv, "CqP:")) != EOF) {
        switch (c) {
        case 'C':
            Cflag = 1;
            break;
        case 'q':
            qflag = 1;
            break;
        case 'P':
            pattern = parse_pattern(optarg);
            if (pattern < 0) {
                return 0;
            }
            break;
        default:
            return command_usage(&writev_cmd);
        }
    }

    if (optind > argc - 2) {
        return command_usage(&writev_cmd);
    }

    nr_reqs = 1;
    for (i = optind; i < argc; i++) {
        if (!strcmp(argv[i], ";")) {
            nr_reqs++;
        }
    }

K
Kevin Wolf 已提交
959 960
    reqs = g_malloc0(nr_reqs * sizeof(*reqs));
    buf = g_malloc0(nr_reqs * sizeof(*buf));
961
    qiovs = g_malloc(nr_reqs * sizeof(*qiovs));
D
Devin Nakamura 已提交
962

963
    for (i = 0; i < nr_reqs && optind < argc; i++) {
D
Devin Nakamura 已提交
964 965 966 967 968 969
        int j;

        /* Read the offset of the request */
        offset = cvtnum(argv[optind]);
        if (offset < 0) {
            printf("non-numeric offset argument -- %s\n", argv[optind]);
970
            goto out;
D
Devin Nakamura 已提交
971 972 973 974 975 976
        }
        optind++;

        if (offset & 0x1ff) {
            printf("offset %lld is not sector aligned\n",
                   (long long)offset);
977
            goto out;
D
Devin Nakamura 已提交
978
        }
K
Kevin Wolf 已提交
979 980 981 982 983

        if (i == 0) {
            first_offset = offset;
        }

D
Devin Nakamura 已提交
984 985 986 987 988 989
        /* Read lengths for qiov entries */
        for (j = optind; j < argc; j++) {
            if (!strcmp(argv[j], ";")) {
                break;
            }
        }
K
Kevin Wolf 已提交
990

D
Devin Nakamura 已提交
991
        nr_iov = j - optind;
K
Kevin Wolf 已提交
992

D
Devin Nakamura 已提交
993
        /* Build request */
K
Kevin Wolf 已提交
994 995 996 997 998
        buf[i] = create_iovec(&qiovs[i], &argv[optind], nr_iov, pattern);
        if (buf[i] == NULL) {
            goto out;
        }

D
Devin Nakamura 已提交
999 1000 1001
        reqs[i].qiov = &qiovs[i];
        reqs[i].sector = offset >> 9;
        reqs[i].nb_sectors = reqs[i].qiov->size >> 9;
K
Kevin Wolf 已提交
1002

D
Devin Nakamura 已提交
1003
        optind = j + 1;
K
Kevin Wolf 已提交
1004

D
Devin Nakamura 已提交
1005 1006
        pattern++;
    }
K
Kevin Wolf 已提交
1007

1008 1009 1010
    /* If there were empty requests at the end, ignore them */
    nr_reqs = i;

D
Devin Nakamura 已提交
1011 1012 1013
    gettimeofday(&t1, NULL);
    cnt = do_aio_multiwrite(reqs, nr_reqs, &total);
    gettimeofday(&t2, NULL);
K
Kevin Wolf 已提交
1014

D
Devin Nakamura 已提交
1015 1016 1017 1018
    if (cnt < 0) {
        printf("aio_multiwrite failed: %s\n", strerror(-cnt));
        goto out;
    }
K
Kevin Wolf 已提交
1019

D
Devin Nakamura 已提交
1020 1021 1022
    if (qflag) {
        goto out;
    }
K
Kevin Wolf 已提交
1023

D
Devin Nakamura 已提交
1024 1025 1026
    /* Finally, report back -- -C gives a parsable format */
    t2 = tsub(t2, t1);
    print_report("wrote", &t2, first_offset, total, total, cnt, Cflag);
K
Kevin Wolf 已提交
1027
out:
D
Devin Nakamura 已提交
1028 1029
    for (i = 0; i < nr_reqs; i++) {
        qemu_io_free(buf[i]);
K
Kevin Wolf 已提交
1030 1031 1032
        if (reqs[i].qiov != NULL) {
            qemu_iovec_destroy(&qiovs[i]);
        }
D
Devin Nakamura 已提交
1033
    }
1034 1035 1036
    g_free(buf);
    g_free(reqs);
    g_free(qiovs);
D
Devin Nakamura 已提交
1037
    return 0;
K
Kevin Wolf 已提交
1038 1039
}

1040
struct aio_ctx {
D
Devin Nakamura 已提交
1041 1042 1043 1044 1045 1046 1047 1048 1049
    QEMUIOVector qiov;
    int64_t offset;
    char *buf;
    int qflag;
    int vflag;
    int Cflag;
    int Pflag;
    int pattern;
    struct timeval t1;
1050 1051
};

D
Devin Nakamura 已提交
1052
static void aio_write_done(void *opaque, int ret)
1053
{
D
Devin Nakamura 已提交
1054 1055
    struct aio_ctx *ctx = opaque;
    struct timeval t2;
1056

D
Devin Nakamura 已提交
1057
    gettimeofday(&t2, NULL);
1058 1059


D
Devin Nakamura 已提交
1060 1061 1062 1063
    if (ret < 0) {
        printf("aio_write failed: %s\n", strerror(-ret));
        goto out;
    }
1064

D
Devin Nakamura 已提交
1065 1066 1067
    if (ctx->qflag) {
        goto out;
    }
1068

D
Devin Nakamura 已提交
1069 1070 1071 1072
    /* Finally, report back -- -C gives a parsable format */
    t2 = tsub(t2, ctx->t1);
    print_report("wrote", &t2, ctx->offset, ctx->qiov.size,
                 ctx->qiov.size, 1, ctx->Cflag);
K
Kevin Wolf 已提交
1073
out:
D
Devin Nakamura 已提交
1074 1075
    qemu_io_free(ctx->buf);
    free(ctx);
1076 1077
}

D
Devin Nakamura 已提交
1078
static void aio_read_done(void *opaque, int ret)
1079
{
D
Devin Nakamura 已提交
1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112
    struct aio_ctx *ctx = opaque;
    struct timeval t2;

    gettimeofday(&t2, NULL);

    if (ret < 0) {
        printf("readv failed: %s\n", strerror(-ret));
        goto out;
    }

    if (ctx->Pflag) {
        void *cmp_buf = malloc(ctx->qiov.size);

        memset(cmp_buf, ctx->pattern, ctx->qiov.size);
        if (memcmp(ctx->buf, cmp_buf, ctx->qiov.size)) {
            printf("Pattern verification failed at offset %"
                   PRId64 ", %zd bytes\n", ctx->offset, ctx->qiov.size);
        }
        free(cmp_buf);
    }

    if (ctx->qflag) {
        goto out;
    }

    if (ctx->vflag) {
        dump_buffer(ctx->buf, ctx->offset, ctx->qiov.size);
    }

    /* Finally, report back -- -C gives a parsable format */
    t2 = tsub(t2, ctx->t1);
    print_report("read", &t2, ctx->offset, ctx->qiov.size,
                 ctx->qiov.size, 1, ctx->Cflag);
K
Kevin Wolf 已提交
1113
out:
D
Devin Nakamura 已提交
1114 1115
    qemu_io_free(ctx->buf);
    free(ctx);
1116 1117
}

D
Devin Nakamura 已提交
1118
static void aio_read_help(void)
1119
{
D
Devin Nakamura 已提交
1120
    printf(
1121 1122 1123 1124 1125 1126 1127 1128
"\n"
" asynchronously reads a range of bytes from the given offset\n"
"\n"
" Example:\n"
" 'aio_read -v 512 1k 1k ' - dumps 2 kilobytes read from 512 bytes into the file\n"
"\n"
" Reads a segment of the currently open file, optionally dumping it to the\n"
" standard output stream (with -v option) for subsequent inspection.\n"
C
Christoph Hellwig 已提交
1129 1130
" The read is performed asynchronously and the aio_flush command must be\n"
" used to ensure all outstanding aio requests have been completed\n"
1131 1132 1133
" -C, -- report statistics in a machine parsable format\n"
" -P, -- use a pattern to verify read data\n"
" -v, -- dump buffer to standard output\n"
K
Kevin Wolf 已提交
1134
" -q, -- quiet mode, do not show I/O statistics\n"
1135 1136 1137
"\n");
}

B
Blue Swirl 已提交
1138 1139 1140
static int aio_read_f(int argc, char **argv);

static const cmdinfo_t aio_read_cmd = {
D
Devin Nakamura 已提交
1141 1142 1143 1144 1145 1146 1147
    .name       = "aio_read",
    .cfunc      = aio_read_f,
    .argmin     = 2,
    .argmax     = -1,
    .args       = "[-Cqv] [-P pattern ] off len [len..]",
    .oneline    = "asynchronously reads a number of bytes",
    .help       = aio_read_help,
B
Blue Swirl 已提交
1148 1149
};

D
Devin Nakamura 已提交
1150
static int aio_read_f(int argc, char **argv)
1151
{
D
Devin Nakamura 已提交
1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202
    int nr_iov, c;
    struct aio_ctx *ctx = calloc(1, sizeof(struct aio_ctx));
    BlockDriverAIOCB *acb;

    while ((c = getopt(argc, argv, "CP:qv")) != EOF) {
        switch (c) {
        case 'C':
            ctx->Cflag = 1;
            break;
        case 'P':
            ctx->Pflag = 1;
            ctx->pattern = parse_pattern(optarg);
            if (ctx->pattern < 0) {
                free(ctx);
                return 0;
            }
            break;
        case 'q':
            ctx->qflag = 1;
            break;
        case 'v':
            ctx->vflag = 1;
            break;
        default:
            free(ctx);
            return command_usage(&aio_read_cmd);
        }
    }

    if (optind > argc - 2) {
        free(ctx);
        return command_usage(&aio_read_cmd);
    }

    ctx->offset = cvtnum(argv[optind]);
    if (ctx->offset < 0) {
        printf("non-numeric length argument -- %s\n", argv[optind]);
        free(ctx);
        return 0;
    }
    optind++;

    if (ctx->offset & 0x1ff) {
        printf("offset %" PRId64 " is not sector aligned\n",
               ctx->offset);
        free(ctx);
        return 0;
    }

    nr_iov = argc - optind;
    ctx->buf = create_iovec(&ctx->qiov, &argv[optind], nr_iov, 0xab);
K
Kevin Wolf 已提交
1203 1204 1205 1206
    if (ctx->buf == NULL) {
        free(ctx);
        return 0;
    }
D
Devin Nakamura 已提交
1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217

    gettimeofday(&ctx->t1, NULL);
    acb = bdrv_aio_readv(bs, ctx->offset >> 9, &ctx->qiov,
                         ctx->qiov.size >> 9, aio_read_done, ctx);
    if (!acb) {
        free(ctx->buf);
        free(ctx);
        return -EIO;
    }

    return 0;
1218 1219
}

D
Devin Nakamura 已提交
1220
static void aio_write_help(void)
1221
{
D
Devin Nakamura 已提交
1222
    printf(
1223
"\n"
D
Devin Nakamura 已提交
1224
" asynchronously writes a range of bytes from the given offset source\n"
1225 1226 1227 1228 1229 1230 1231
" from multiple buffers\n"
"\n"
" Example:\n"
" 'aio_write 512 1k 1k' - writes 2 kilobytes at 512 bytes into the open file\n"
"\n"
" Writes into a segment of the currently open file, using a buffer\n"
" filled with a set pattern (0xcdcdcdcd).\n"
C
Christoph Hellwig 已提交
1232 1233
" The write is performed asynchronously and the aio_flush command must be\n"
" used to ensure all outstanding aio requests have been completed\n"
1234 1235
" -P, -- use different pattern to fill file\n"
" -C, -- report statistics in a machine parsable format\n"
K
Kevin Wolf 已提交
1236
" -q, -- quiet mode, do not show I/O statistics\n"
1237 1238 1239
"\n");
}

B
Blue Swirl 已提交
1240 1241 1242
static int aio_write_f(int argc, char **argv);

static const cmdinfo_t aio_write_cmd = {
D
Devin Nakamura 已提交
1243 1244 1245 1246 1247 1248 1249
    .name       = "aio_write",
    .cfunc      = aio_write_f,
    .argmin     = 2,
    .argmax     = -1,
    .args       = "[-Cq] [-P pattern ] off len [len..]",
    .oneline    = "asynchronously writes a number of bytes",
    .help       = aio_write_help,
B
Blue Swirl 已提交
1250
};
1251

D
Devin Nakamura 已提交
1252
static int aio_write_f(int argc, char **argv)
1253
{
D
Devin Nakamura 已提交
1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269
    int nr_iov, c;
    int pattern = 0xcd;
    struct aio_ctx *ctx = calloc(1, sizeof(struct aio_ctx));
    BlockDriverAIOCB *acb;

    while ((c = getopt(argc, argv, "CqP:")) != EOF) {
        switch (c) {
        case 'C':
            ctx->Cflag = 1;
            break;
        case 'q':
            ctx->qflag = 1;
            break;
        case 'P':
            pattern = parse_pattern(optarg);
            if (pattern < 0) {
A
Alex Jia 已提交
1270
                free(ctx);
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                return 0;
            }
            break;
        default:
            free(ctx);
            return command_usage(&aio_write_cmd);
        }
    }

    if (optind > argc - 2) {
        free(ctx);
        return command_usage(&aio_write_cmd);
    }

    ctx->offset = cvtnum(argv[optind]);
    if (ctx->offset < 0) {
        printf("non-numeric length argument -- %s\n", argv[optind]);
        free(ctx);
        return 0;
    }
    optind++;

    if (ctx->offset & 0x1ff) {
        printf("offset %" PRId64 " is not sector aligned\n",
               ctx->offset);
        free(ctx);
        return 0;
    }

    nr_iov = argc - optind;
    ctx->buf = create_iovec(&ctx->qiov, &argv[optind], nr_iov, pattern);
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    if (ctx->buf == NULL) {
        free(ctx);
        return 0;
    }
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    gettimeofday(&ctx->t1, NULL);
    acb = bdrv_aio_writev(bs, ctx->offset >> 9, &ctx->qiov,
                          ctx->qiov.size >> 9, aio_write_done, ctx);
    if (!acb) {
        free(ctx->buf);
        free(ctx);
        return -EIO;
    }

    return 0;
1317 1318
}

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1319
static int aio_flush_f(int argc, char **argv)
1320
{
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    qemu_aio_flush();
    return 0;
1323 1324 1325
}

static const cmdinfo_t aio_flush_cmd = {
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    .name       = "aio_flush",
    .cfunc      = aio_flush_f,
    .oneline    = "completes all outstanding aio requests"
1329 1330
};

D
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static int flush_f(int argc, char **argv)
1332
{
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    bdrv_flush(bs);
    return 0;
1335 1336 1337
}

static const cmdinfo_t flush_cmd = {
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    .name       = "flush",
    .altname    = "f",
    .cfunc      = flush_f,
    .oneline    = "flush all in-core file state to disk",
1342 1343
};

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1344
static int truncate_f(int argc, char **argv)
1345
{
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    int64_t offset;
    int ret;

    offset = cvtnum(argv[1]);
    if (offset < 0) {
        printf("non-numeric truncate argument -- %s\n", argv[1]);
        return 0;
    }

    ret = bdrv_truncate(bs, offset);
    if (ret < 0) {
        printf("truncate: %s\n", strerror(-ret));
        return 0;
    }

    return 0;
1362 1363 1364
}

static const cmdinfo_t truncate_cmd = {
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    .name       = "truncate",
    .altname    = "t",
    .cfunc      = truncate_f,
    .argmin     = 1,
    .argmax     = 1,
    .args       = "off",
    .oneline    = "truncates the current file at the given offset",
1372 1373
};

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static int length_f(int argc, char **argv)
1375
{
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    int64_t size;
    char s1[64];

    size = bdrv_getlength(bs);
    if (size < 0) {
        printf("getlength: %s\n", strerror(-size));
        return 0;
    }

    cvtstr(size, s1, sizeof(s1));
    printf("%s\n", s1);
    return 0;
1388 1389 1390 1391
}


static const cmdinfo_t length_cmd = {
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    .name   = "length",
    .altname    = "l",
    .cfunc      = length_f,
    .oneline    = "gets the length of the current file",
1396 1397 1398
};


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static int info_f(int argc, char **argv)
1400
{
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    BlockDriverInfo bdi;
    char s1[64], s2[64];
    int ret;
1404

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    if (bs->drv && bs->drv->format_name) {
        printf("format name: %s\n", bs->drv->format_name);
    }
    if (bs->drv && bs->drv->protocol_name) {
        printf("format name: %s\n", bs->drv->protocol_name);
    }
1411

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    ret = bdrv_get_info(bs, &bdi);
    if (ret) {
        return 0;
    }
1416

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    cvtstr(bdi.cluster_size, s1, sizeof(s1));
    cvtstr(bdi.vm_state_offset, s2, sizeof(s2));
1419

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    printf("cluster size: %s\n", s1);
    printf("vm state offset: %s\n", s2);
1422

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    return 0;
1424 1425 1426 1427 1428
}



static const cmdinfo_t info_cmd = {
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    .name       = "info",
    .altname    = "i",
    .cfunc      = info_f,
    .oneline    = "prints information about the current file",
1433 1434
};

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static void discard_help(void)
S
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1436
{
D
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    printf(
S
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1438 1439 1440 1441 1442 1443 1444 1445
"\n"
" discards a range of bytes from the given offset\n"
"\n"
" Example:\n"
" 'discard 512 1k' - discards 1 kilobyte from 512 bytes into the file\n"
"\n"
" Discards a segment of the currently open file.\n"
" -C, -- report statistics in a machine parsable format\n"
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" -q, -- quiet mode, do not show I/O statistics\n"
S
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1447 1448 1449 1450 1451 1452
"\n");
}

static int discard_f(int argc, char **argv);

static const cmdinfo_t discard_cmd = {
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    .name       = "discard",
    .altname    = "d",
    .cfunc      = discard_f,
    .argmin     = 2,
    .argmax     = -1,
    .args       = "[-Cq] off len",
    .oneline    = "discards a number of bytes at a specified offset",
    .help       = discard_help,
S
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};

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static int discard_f(int argc, char **argv)
S
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1464
{
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    struct timeval t1, t2;
    int Cflag = 0, qflag = 0;
    int c, ret;
    int64_t offset;
    int count;

    while ((c = getopt(argc, argv, "Cq")) != EOF) {
        switch (c) {
        case 'C':
            Cflag = 1;
            break;
        case 'q':
            qflag = 1;
            break;
        default:
            return command_usage(&discard_cmd);
        }
    }

    if (optind != argc - 2) {
        return command_usage(&discard_cmd);
    }

    offset = cvtnum(argv[optind]);
    if (offset < 0) {
        printf("non-numeric length argument -- %s\n", argv[optind]);
        return 0;
    }

    optind++;
    count = cvtnum(argv[optind]);
    if (count < 0) {
        printf("non-numeric length argument -- %s\n", argv[optind]);
        return 0;
    }

    gettimeofday(&t1, NULL);
    ret = bdrv_discard(bs, offset >> BDRV_SECTOR_BITS,
                       count >> BDRV_SECTOR_BITS);
    gettimeofday(&t2, NULL);

    if (ret < 0) {
        printf("discard failed: %s\n", strerror(-ret));
        goto out;
    }

    /* Finally, report back -- -C gives a parsable format */
    if (!qflag) {
        t2 = tsub(t2, t1);
        print_report("discard", &t2, offset, count, count, 1, Cflag);
    }
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out:
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    return 0;
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}

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static int alloc_f(int argc, char **argv)
1522
{
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    int64_t offset;
    int nb_sectors, remaining;
    char s1[64];
    int num, sum_alloc;
    int ret;

    offset = cvtnum(argv[1]);
    if (offset & 0x1ff) {
        printf("offset %" PRId64 " is not sector aligned\n",
               offset);
        return 0;
    }

    if (argc == 3) {
        nb_sectors = cvtnum(argv[2]);
    } else {
        nb_sectors = 1;
    }

    remaining = nb_sectors;
    sum_alloc = 0;
    while (remaining) {
        ret = bdrv_is_allocated(bs, offset >> 9, nb_sectors, &num);
        remaining -= num;
        if (ret) {
            sum_alloc += num;
        }
    }

    cvtstr(offset, s1, sizeof(s1));

    printf("%d/%d sectors allocated at offset %s\n",
           sum_alloc, nb_sectors, s1);
    return 0;
1557 1558 1559
}

static const cmdinfo_t alloc_cmd = {
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    .name       = "alloc",
    .altname    = "a",
    .argmin     = 1,
    .argmax     = 2,
    .cfunc      = alloc_f,
    .args       = "off [sectors]",
    .oneline    = "checks if a sector is present in the file",
1567 1568
};

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static int map_f(int argc, char **argv)
K
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{
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    int64_t offset;
    int64_t nb_sectors;
    char s1[64];
    int num, num_checked;
    int ret;
    const char *retstr;

    offset = 0;
    nb_sectors = bs->total_sectors;

    do {
        num_checked = MIN(nb_sectors, INT_MAX);
        ret = bdrv_is_allocated(bs, offset, num_checked, &num);
        retstr = ret ? "    allocated" : "not allocated";
        cvtstr(offset << 9ULL, s1, sizeof(s1));
        printf("[% 24" PRId64 "] % 8d/% 8d sectors %s at offset %s (%d)\n",
               offset << 9ULL, num, num_checked, retstr, s1, ret);

        offset += num;
        nb_sectors -= num;
    } while (offset < bs->total_sectors);

    return 0;
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}

static const cmdinfo_t map_cmd = {
       .name           = "map",
       .argmin         = 0,
       .argmax         = 0,
       .cfunc          = map_f,
       .args           = "",
       .oneline        = "prints the allocated areas of a file",
};


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1606
static int close_f(int argc, char **argv)
1607
{
1608
    bdrv_delete(bs);
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    bs = NULL;
    return 0;
1611 1612 1613
}

static const cmdinfo_t close_cmd = {
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1614 1615 1616 1617
    .name       = "close",
    .altname    = "c",
    .cfunc      = close_f,
    .oneline    = "close the current open file",
1618 1619
};

1620
static int openfile(char *name, int flags, int growable)
1621
{
D
Devin Nakamura 已提交
1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636
    if (bs) {
        fprintf(stderr, "file open already, try 'help close'\n");
        return 1;
    }

    if (growable) {
        if (bdrv_file_open(&bs, name, flags)) {
            fprintf(stderr, "%s: can't open device %s\n", progname, name);
            return 1;
        }
    } else {
        bs = bdrv_new("hda");

        if (bdrv_open(bs, name, flags, NULL) < 0) {
            fprintf(stderr, "%s: can't open device %s\n", progname, name);
1637
            bdrv_delete(bs);
D
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1638 1639 1640 1641 1642 1643
            bs = NULL;
            return 1;
        }
    }

    return 0;
1644 1645
}

D
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1646
static void open_help(void)
1647
{
D
Devin Nakamura 已提交
1648
    printf(
1649 1650 1651 1652 1653 1654 1655 1656 1657 1658
"\n"
" opens a new file in the requested mode\n"
"\n"
" Example:\n"
" 'open -Cn /tmp/data' - creates/opens data file read-write and uncached\n"
"\n"
" Opens a file for subsequent use by all of the other qemu-io commands.\n"
" -r, -- open file read-only\n"
" -s, -- use snapshot file\n"
" -n, -- disable host cache\n"
1659
" -g, -- allow file to grow (only applies to protocols)"
1660 1661 1662
"\n");
}

B
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1663 1664 1665
static int open_f(int argc, char **argv);

static const cmdinfo_t open_cmd = {
D
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1666 1667 1668 1669 1670 1671 1672 1673 1674
    .name       = "open",
    .altname    = "o",
    .cfunc      = open_f,
    .argmin     = 1,
    .argmax     = -1,
    .flags      = CMD_NOFILE_OK,
    .args       = "[-Crsn] [path]",
    .oneline    = "open the file specified by path",
    .help       = open_help,
B
Blue Swirl 已提交
1675
};
1676

D
Devin Nakamura 已提交
1677
static int open_f(int argc, char **argv)
1678
{
D
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1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699
    int flags = 0;
    int readonly = 0;
    int growable = 0;
    int c;

    while ((c = getopt(argc, argv, "snrg")) != EOF) {
        switch (c) {
        case 's':
            flags |= BDRV_O_SNAPSHOT;
            break;
        case 'n':
            flags |= BDRV_O_NOCACHE | BDRV_O_CACHE_WB;
            break;
        case 'r':
            readonly = 1;
            break;
        case 'g':
            growable = 1;
            break;
        default:
            return command_usage(&open_cmd);
1700
        }
D
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1701 1702 1703 1704 1705
    }

    if (!readonly) {
        flags |= BDRV_O_RDWR;
    }
1706

D
Devin Nakamura 已提交
1707 1708 1709
    if (optind != argc - 1) {
        return command_usage(&open_cmd);
    }
1710

D
Devin Nakamura 已提交
1711
    return openfile(argv[optind], flags, growable);
1712 1713
}

D
Devin Nakamura 已提交
1714
static int init_args_command(int index)
1715
{
D
Devin Nakamura 已提交
1716 1717 1718 1719 1720
    /* only one device allowed so far */
    if (index >= 1) {
        return 0;
    }
    return ++index;
1721 1722
}

D
Devin Nakamura 已提交
1723
static int init_check_command(const cmdinfo_t *ct)
1724
{
D
Devin Nakamura 已提交
1725 1726 1727 1728 1729 1730 1731 1732
    if (ct->flags & CMD_FLAG_GLOBAL) {
        return 1;
    }
    if (!(ct->flags & CMD_NOFILE_OK) && !bs) {
        fprintf(stderr, "no file open, try 'help open'\n");
        return 0;
    }
    return 1;
1733 1734 1735 1736
}

static void usage(const char *name)
{
D
Devin Nakamura 已提交
1737
    printf(
C
Christoph Hellwig 已提交
1738
"Usage: %s [-h] [-V] [-rsnm] [-c cmd] ... [file]\n"
1739
"QEMU Disk exerciser\n"
1740 1741 1742 1743 1744
"\n"
"  -c, --cmd            command to execute\n"
"  -r, --read-only      export read-only\n"
"  -s, --snapshot       use snapshot file\n"
"  -n, --nocache        disable host cache\n"
1745
"  -g, --growable       allow file to grow (only applies to protocols)\n"
1746
"  -m, --misalign       misalign allocations for O_DIRECT\n"
1747
"  -k, --native-aio     use kernel AIO implementation (on Linux only)\n"
1748 1749 1750
"  -h, --help           display this help and exit\n"
"  -V, --version        output version information and exit\n"
"\n",
D
Devin Nakamura 已提交
1751
    name);
1752 1753 1754 1755 1756
}


int main(int argc, char **argv)
{
D
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1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810
    int readonly = 0;
    int growable = 0;
    const char *sopt = "hVc:rsnmgk";
    const struct option lopt[] = {
        { "help", 0, NULL, 'h' },
        { "version", 0, NULL, 'V' },
        { "offset", 1, NULL, 'o' },
        { "cmd", 1, NULL, 'c' },
        { "read-only", 0, NULL, 'r' },
        { "snapshot", 0, NULL, 's' },
        { "nocache", 0, NULL, 'n' },
        { "misalign", 0, NULL, 'm' },
        { "growable", 0, NULL, 'g' },
        { "native-aio", 0, NULL, 'k' },
        { NULL, 0, NULL, 0 }
    };
    int c;
    int opt_index = 0;
    int flags = 0;

    progname = basename(argv[0]);

    while ((c = getopt_long(argc, argv, sopt, lopt, &opt_index)) != -1) {
        switch (c) {
        case 's':
            flags |= BDRV_O_SNAPSHOT;
            break;
        case 'n':
            flags |= BDRV_O_NOCACHE | BDRV_O_CACHE_WB;
            break;
        case 'c':
            add_user_command(optarg);
            break;
        case 'r':
            readonly = 1;
            break;
        case 'm':
            misalign = 1;
            break;
        case 'g':
            growable = 1;
            break;
        case 'k':
            flags |= BDRV_O_NATIVE_AIO;
            break;
        case 'V':
            printf("%s version %s\n", progname, VERSION);
            exit(0);
        case 'h':
            usage(progname);
            exit(0);
        default:
            usage(progname);
            exit(1);
1811
        }
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1812 1813 1814 1815 1816 1817
    }

    if ((argc - optind) > 1) {
        usage(progname);
        exit(1);
    }
1818

D
Devin Nakamura 已提交
1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853
    bdrv_init();

    /* initialize commands */
    quit_init();
    help_init();
    add_command(&open_cmd);
    add_command(&close_cmd);
    add_command(&read_cmd);
    add_command(&readv_cmd);
    add_command(&write_cmd);
    add_command(&writev_cmd);
    add_command(&multiwrite_cmd);
    add_command(&aio_read_cmd);
    add_command(&aio_write_cmd);
    add_command(&aio_flush_cmd);
    add_command(&flush_cmd);
    add_command(&truncate_cmd);
    add_command(&length_cmd);
    add_command(&info_cmd);
    add_command(&discard_cmd);
    add_command(&alloc_cmd);
    add_command(&map_cmd);

    add_args_command(init_args_command);
    add_check_command(init_check_command);

    /* open the device */
    if (!readonly) {
        flags |= BDRV_O_RDWR;
    }

    if ((argc - optind) == 1) {
        openfile(argv[optind], flags, growable);
    }
    command_loop();
1854

D
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1855 1856 1857 1858
    /*
     * Make sure all outstanding requests get flushed the program exits.
     */
    qemu_aio_flush();
1859

D
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1860
    if (bs) {
1861
        bdrv_delete(bs);
D
Devin Nakamura 已提交
1862 1863
    }
    return 0;
1864
}