qemu-io-cmds.c 54.2 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 "qemu-io.h"
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#include "block/block_int.h"
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#include "block/qapi.h"
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#include "qemu/main-loop.h"
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#include "qemu/timer.h"
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#define CMD_NOFILE_OK   0x01

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bool qemuio_misalign;
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static cmdinfo_t *cmdtab;
static int ncmds;

static int compare_cmdname(const void *a, const void *b)
{
    return strcmp(((const cmdinfo_t *)a)->name,
                  ((const cmdinfo_t *)b)->name);
}

void qemuio_add_command(const cmdinfo_t *ci)
{
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    cmdtab = g_renew(cmdinfo_t, cmdtab, ++ncmds);
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    cmdtab[ncmds - 1] = *ci;
    qsort(cmdtab, ncmds, sizeof(*cmdtab), compare_cmdname);
}

int qemuio_command_usage(const cmdinfo_t *ci)
{
    printf("%s %s -- %s\n", ci->name, ci->args, ci->oneline);
    return 0;
}

static int init_check_command(BlockDriverState *bs, const cmdinfo_t *ct)
{
    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;
}

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static int command(BlockDriverState *bs, const cmdinfo_t *ct, int argc,
                   char **argv)
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{
    char *cmd = argv[0];

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    if (!init_check_command(bs, ct)) {
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        return 0;
    }

    if (argc - 1 < ct->argmin || (ct->argmax != -1 && argc - 1 > ct->argmax)) {
        if (ct->argmax == -1) {
            fprintf(stderr,
                    "bad argument count %d to %s, expected at least %d arguments\n",
                    argc-1, cmd, ct->argmin);
        } else if (ct->argmin == ct->argmax) {
            fprintf(stderr,
                    "bad argument count %d to %s, expected %d arguments\n",
                    argc-1, cmd, ct->argmin);
        } else {
            fprintf(stderr,
                    "bad argument count %d to %s, expected between %d and %d arguments\n",
                    argc-1, cmd, ct->argmin, ct->argmax);
        }
        return 0;
    }
    optind = 0;
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    return ct->cfunc(bs, argc, argv);
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}

static const cmdinfo_t *find_command(const char *cmd)
{
    cmdinfo_t *ct;

    for (ct = cmdtab; ct < &cmdtab[ncmds]; ct++) {
        if (strcmp(ct->name, cmd) == 0 ||
            (ct->altname && strcmp(ct->altname, cmd) == 0))
        {
            return (const cmdinfo_t *)ct;
        }
    }
    return NULL;
}

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/* Invoke fn() for commands with a matching prefix */
void qemuio_complete_command(const char *input,
                             void (*fn)(const char *cmd, void *opaque),
                             void *opaque)
{
    cmdinfo_t *ct;
    size_t input_len = strlen(input);

    for (ct = cmdtab; ct < &cmdtab[ncmds]; ct++) {
        if (strncmp(input, ct->name, input_len) == 0) {
            fn(ct->name, opaque);
        }
    }
}

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static char **breakline(char *input, int *count)
{
    int c = 0;
    char *p;
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    char **rval = g_new0(char *, 1);
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    while (rval && (p = qemu_strsep(&input, " ")) != NULL) {
        if (!*p) {
            continue;
        }
        c++;
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        rval = g_renew(char *, rval, (c + 1));
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        rval[c - 1] = p;
        rval[c] = NULL;
    }
    *count = c;
    return rval;
}

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static int64_t cvtnum(const char *s)
{
    char *end;
    return strtosz_suffix(s, &end, STRTOSZ_DEFSUFFIX_B);
}

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#define EXABYTES(x)     ((long long)(x) << 60)
#define PETABYTES(x)    ((long long)(x) << 50)
#define TERABYTES(x)    ((long long)(x) << 40)
#define GIGABYTES(x)    ((long long)(x) << 30)
#define MEGABYTES(x)    ((long long)(x) << 20)
#define KILOBYTES(x)    ((long long)(x) << 10)

#define TO_EXABYTES(x)  ((x) / EXABYTES(1))
#define TO_PETABYTES(x) ((x) / PETABYTES(1))
#define TO_TERABYTES(x) ((x) / TERABYTES(1))
#define TO_GIGABYTES(x) ((x) / GIGABYTES(1))
#define TO_MEGABYTES(x) ((x) / MEGABYTES(1))
#define TO_KILOBYTES(x) ((x) / KILOBYTES(1))

static void cvtstr(double value, char *str, size_t size)
{
    char *trim;
    const char *suffix;

    if (value >= EXABYTES(1)) {
        suffix = " EiB";
        snprintf(str, size - 4, "%.3f", TO_EXABYTES(value));
    } else if (value >= PETABYTES(1)) {
        suffix = " PiB";
        snprintf(str, size - 4, "%.3f", TO_PETABYTES(value));
    } else if (value >= TERABYTES(1)) {
        suffix = " TiB";
        snprintf(str, size - 4, "%.3f", TO_TERABYTES(value));
    } else if (value >= GIGABYTES(1)) {
        suffix = " GiB";
        snprintf(str, size - 4, "%.3f", TO_GIGABYTES(value));
    } else if (value >= MEGABYTES(1)) {
        suffix = " MiB";
        snprintf(str, size - 4, "%.3f", TO_MEGABYTES(value));
    } else if (value >= KILOBYTES(1)) {
        suffix = " KiB";
        snprintf(str, size - 4, "%.3f", TO_KILOBYTES(value));
    } else {
        suffix = " bytes";
        snprintf(str, size - 6, "%f", value);
    }

    trim = strstr(str, ".000");
    if (trim) {
        strcpy(trim, suffix);
    } else {
        strcat(str, suffix);
    }
}



static struct timeval tsub(struct timeval t1, struct timeval t2)
{
    t1.tv_usec -= t2.tv_usec;
    if (t1.tv_usec < 0) {
        t1.tv_usec += 1000000;
        t1.tv_sec--;
    }
    t1.tv_sec -= t2.tv_sec;
    return t1;
}

static double tdiv(double value, struct timeval tv)
{
    return value / ((double)tv.tv_sec + ((double)tv.tv_usec / 1000000.0));
}

#define HOURS(sec)      ((sec) / (60 * 60))
#define MINUTES(sec)    (((sec) % (60 * 60)) / 60)
#define SECONDS(sec)    ((sec) % 60)

enum {
    DEFAULT_TIME        = 0x0,
    TERSE_FIXED_TIME    = 0x1,
    VERBOSE_FIXED_TIME  = 0x2,
};

static void timestr(struct timeval *tv, char *ts, size_t size, int format)
{
    double usec = (double)tv->tv_usec / 1000000.0;

    if (format & TERSE_FIXED_TIME) {
        if (!HOURS(tv->tv_sec)) {
            snprintf(ts, size, "%u:%02u.%02u",
                    (unsigned int) MINUTES(tv->tv_sec),
                    (unsigned int) SECONDS(tv->tv_sec),
                    (unsigned int) (usec * 100));
            return;
        }
        format |= VERBOSE_FIXED_TIME; /* fallback if hours needed */
    }

    if ((format & VERBOSE_FIXED_TIME) || tv->tv_sec) {
        snprintf(ts, size, "%u:%02u:%02u.%02u",
                (unsigned int) HOURS(tv->tv_sec),
                (unsigned int) MINUTES(tv->tv_sec),
                (unsigned int) SECONDS(tv->tv_sec),
                (unsigned int) (usec * 100));
    } else {
        snprintf(ts, size, "0.%04u sec", (unsigned int) (usec * 10000));
    }
}

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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)
{
    char *endptr = NULL;
    long pattern;

    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;
    }

    return pattern;
}

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

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

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

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

static void dump_buffer(const void *buffer, int64_t offset, int len)
{
    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");
    }
}

static void print_report(const char *op, struct timeval *t, int64_t offset,
                         int count, int total, int cnt, int Cflag)
{
    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));
    }
}

/*
 * Parse multiple length statements for vectored I/O, and construct an I/O
 * vector matching it.
 */
static void *
create_iovec(BlockDriverState *bs, QEMUIOVector *qiov, char **argv, int nr_iov,
             int pattern)
{
    size_t *sizes = g_new0(size_t, nr_iov);
    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(bs, count, pattern);

    for (i = 0; i < nr_iov; i++) {
        qemu_iovec_add(qiov, p, sizes[i]);
        p += sizes[i];
    }

fail:
    g_free(sizes);
    return buf;
}

static int do_read(BlockDriverState *bs, char *buf, int64_t offset, int count,
                   int *total)
{
    int ret;

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

static int do_write(BlockDriverState *bs, char *buf, int64_t offset, int count,
                    int *total)
{
    int ret;

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

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

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

typedef struct {
    BlockDriverState *bs;
    int64_t offset;
    int count;
    int *total;
    int ret;
    bool done;
} CoWriteZeroes;

static void coroutine_fn co_write_zeroes_entry(void *opaque)
{
    CoWriteZeroes *data = opaque;

    data->ret = bdrv_co_write_zeroes(data->bs, data->offset / BDRV_SECTOR_SIZE,
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                                     data->count / BDRV_SECTOR_SIZE, 0);
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    data->done = true;
    if (data->ret < 0) {
        *data->total = data->ret;
        return;
    }

    *data->total = data->count;
}

static int do_co_write_zeroes(BlockDriverState *bs, int64_t offset, int count,
                              int *total)
{
    Coroutine *co;
    CoWriteZeroes data = {
        .bs     = bs,
        .offset = offset,
        .count  = count,
        .total  = total,
        .done   = false,
    };

    co = qemu_coroutine_create(co_write_zeroes_entry);
    qemu_coroutine_enter(co, &data);
    while (!data.done) {
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        aio_poll(bdrv_get_aio_context(bs), true);
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    }
    if (data.ret < 0) {
        return data.ret;
    } else {
        return 1;
    }
}

static int do_write_compressed(BlockDriverState *bs, char *buf, int64_t offset,
                               int count, int *total)
{
    int ret;

    ret = bdrv_write_compressed(bs, offset >> 9, (uint8_t *)buf, count >> 9);
    if (ret < 0) {
        return ret;
    }
    *total = count;
    return 1;
}

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

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

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

static int do_aio_readv(BlockDriverState *bs, QEMUIOVector *qiov,
                        int64_t offset, int *total)
{
    int async_ret = NOT_DONE;

    bdrv_aio_readv(bs, offset >> 9, qiov, qiov->size >> 9,
                   aio_rw_done, &async_ret);
    while (async_ret == NOT_DONE) {
        main_loop_wait(false);
    }

    *total = qiov->size;
    return async_ret < 0 ? async_ret : 1;
}

static int do_aio_writev(BlockDriverState *bs, QEMUIOVector *qiov,
                         int64_t offset, int *total)
{
    int async_ret = NOT_DONE;

    bdrv_aio_writev(bs, offset >> 9, qiov, qiov->size >> 9,
                    aio_rw_done, &async_ret);
    while (async_ret == NOT_DONE) {
        main_loop_wait(false);
    }

    *total = qiov->size;
    return async_ret < 0 ? async_ret : 1;
}

struct multiwrite_async_ret {
    int num_done;
    int error;
};

static void multiwrite_cb(void *opaque, int ret)
{
    struct multiwrite_async_ret *async_ret = opaque;

    async_ret->num_done++;
    if (ret < 0) {
        async_ret->error = ret;
    }
}

static int do_aio_multiwrite(BlockDriverState *bs, BlockRequest* reqs,
                             int num_reqs, int *total)
{
    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) {
        main_loop_wait(false);
    }

    return async_ret.error < 0 ? async_ret.error : 1;
}

static void read_help(void)
{
    printf(
"\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"
" -b, -- read from the VM state rather than the virtual disk\n"
" -C, -- report statistics in a machine parsable format\n"
" -l, -- length for pattern verification (only with -P)\n"
" -p, -- use bdrv_pread to read the file\n"
" -P, -- use a pattern to verify read data\n"
" -q, -- quiet mode, do not show I/O statistics\n"
" -s, -- start offset for pattern verification (only with -P)\n"
" -v, -- dump buffer to standard output\n"
"\n");
}

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

static const cmdinfo_t read_cmd = {
    .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,
};

static int read_f(BlockDriverState *bs, int argc, char **argv)
{
    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:
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            return qemuio_command_usage(&read_cmd);
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        }
    }

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

    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 && (lflag || sflag)) {
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        return qemuio_command_usage(&read_cmd);
715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848
    }

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

    if ((pattern_count < 0) || (pattern_count + pattern_offset > count))  {
        printf("pattern verification range exceeds end of read data\n");
        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(bs, count, 0xab);

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

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

    if (Pflag) {
        void *cmp_buf = g_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);
        }
        g_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);

out:
    qemu_io_free(buf);

    return 0;
}

static void readv_help(void)
{
    printf(
"\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"
" -P, -- use a pattern to verify read data\n"
" -v, -- dump buffer to standard output\n"
" -q, -- quiet mode, do not show I/O statistics\n"
"\n");
}

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

static const cmdinfo_t readv_cmd = {
    .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,
};

static int readv_f(BlockDriverState *bs, int argc, char **argv)
{
    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:
849
            return qemuio_command_usage(&readv_cmd);
850 851 852 853
        }
    }

    if (optind > argc - 2) {
854
        return qemuio_command_usage(&readv_cmd);
855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988
    }


    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(bs, &qiov, &argv[optind], nr_iov, 0xab);
    if (buf == NULL) {
        return 0;
    }

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

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

    if (Pflag) {
        void *cmp_buf = g_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);
        }
        g_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);

out:
    qemu_iovec_destroy(&qiov);
    qemu_io_free(buf);
    return 0;
}

static void write_help(void)
{
    printf(
"\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"
" -b, -- write to the VM state rather than the virtual disk\n"
" -c, -- write compressed data with bdrv_write_compressed\n"
" -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"
" -q, -- quiet mode, do not show I/O statistics\n"
" -z, -- write zeroes using bdrv_co_write_zeroes\n"
"\n");
}

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

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

static int write_f(BlockDriverState *bs, int argc, char **argv)
{
    struct timeval t1, t2;
    int Cflag = 0, pflag = 0, qflag = 0, bflag = 0, Pflag = 0, zflag = 0;
    int cflag = 0;
    int c, cnt;
    char *buf = NULL;
    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, "bcCpP:qz")) != EOF) {
        switch (c) {
        case 'b':
            bflag = 1;
            break;
        case 'c':
            cflag = 1;
            break;
        case 'C':
            Cflag = 1;
            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 'z':
            zflag = 1;
            break;
        default:
989
            return qemuio_command_usage(&write_cmd);
990 991 992 993
        }
    }

    if (optind != argc - 2) {
994
        return qemuio_command_usage(&write_cmd);
995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080
    }

    if (bflag + pflag + zflag > 1) {
        printf("-b, -p, or -z cannot be specified at the same time\n");
        return 0;
    }

    if (zflag && Pflag) {
        printf("-z 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;
        }
    }

    if (!zflag) {
        buf = qemu_io_alloc(bs, count, pattern);
    }

    gettimeofday(&t1, NULL);
    if (pflag) {
        cnt = do_pwrite(bs, buf, offset, count, &total);
    } else if (bflag) {
        cnt = do_save_vmstate(bs, buf, offset, count, &total);
    } else if (zflag) {
        cnt = do_co_write_zeroes(bs, offset, count, &total);
    } else if (cflag) {
        cnt = do_write_compressed(bs, buf, offset, count, &total);
    } else {
        cnt = do_write(bs, 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);

out:
    if (!zflag) {
        qemu_io_free(buf);
    }

    return 0;
}

static void
writev_help(void)
{
    printf(
"\n"
" writes a range of bytes from the given offset source from multiple buffers\n"
"\n"
" Example:\n"
1081
" 'writev 512 1k 1k' - writes 2 kilobytes at 512 bytes into the open file\n"
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 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130
"\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"
" -q, -- quiet mode, do not show I/O statistics\n"
"\n");
}

static int writev_f(BlockDriverState *bs, int argc, char **argv);

static const cmdinfo_t writev_cmd = {
    .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,
};

static int writev_f(BlockDriverState *bs, int argc, char **argv)
{
    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:
1131
            return qemuio_command_usage(&writev_cmd);
1132 1133 1134 1135
        }
    }

    if (optind > argc - 2) {
1136
        return qemuio_command_usage(&writev_cmd);
1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 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 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242
    }

    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(bs, &qiov, &argv[optind], nr_iov, pattern);
    if (buf == NULL) {
        return 0;
    }

    gettimeofday(&t1, NULL);
    cnt = do_aio_writev(bs, &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);
out:
    qemu_iovec_destroy(&qiov);
    qemu_io_free(buf);
    return 0;
}

static void multiwrite_help(void)
{
    printf(
"\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"
" 'multiwrite 512 1k 1k ; 4k 1k'\n"
"  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(BlockDriverState *bs, int argc, char **argv);

static const cmdinfo_t multiwrite_cmd = {
    .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,
};

static int multiwrite_f(BlockDriverState *bs, int argc, char **argv)
{
    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:
1243
            return qemuio_command_usage(&writev_cmd);
1244 1245 1246 1247
        }
    }

    if (optind > argc - 2) {
1248
        return qemuio_command_usage(&writev_cmd);
1249 1250 1251 1252 1253 1254 1255 1256 1257
    }

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

1258 1259 1260
    reqs = g_new0(BlockRequest, nr_reqs);
    buf = g_new0(char *, nr_reqs);
    qiovs = g_new(QEMUIOVector, nr_reqs);
1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476

    for (i = 0; i < nr_reqs && optind < argc; i++) {
        int j;

        /* Read the offset of the request */
        offset = cvtnum(argv[optind]);
        if (offset < 0) {
            printf("non-numeric offset argument -- %s\n", argv[optind]);
            goto out;
        }
        optind++;

        if (offset & 0x1ff) {
            printf("offset %lld is not sector aligned\n",
                   (long long)offset);
            goto out;
        }

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

        /* Read lengths for qiov entries */
        for (j = optind; j < argc; j++) {
            if (!strcmp(argv[j], ";")) {
                break;
            }
        }

        nr_iov = j - optind;

        /* Build request */
        buf[i] = create_iovec(bs, &qiovs[i], &argv[optind], nr_iov, pattern);
        if (buf[i] == NULL) {
            goto out;
        }

        reqs[i].qiov = &qiovs[i];
        reqs[i].sector = offset >> 9;
        reqs[i].nb_sectors = reqs[i].qiov->size >> 9;

        optind = j + 1;

        pattern++;
    }

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

    gettimeofday(&t1, NULL);
    cnt = do_aio_multiwrite(bs, reqs, nr_reqs, &total);
    gettimeofday(&t2, NULL);

    if (cnt < 0) {
        printf("aio_multiwrite 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, first_offset, total, total, cnt, Cflag);
out:
    for (i = 0; i < nr_reqs; i++) {
        qemu_io_free(buf[i]);
        if (reqs[i].qiov != NULL) {
            qemu_iovec_destroy(&qiovs[i]);
        }
    }
    g_free(buf);
    g_free(reqs);
    g_free(qiovs);
    return 0;
}

struct aio_ctx {
    QEMUIOVector qiov;
    int64_t offset;
    char *buf;
    int qflag;
    int vflag;
    int Cflag;
    int Pflag;
    int pattern;
    struct timeval t1;
};

static void aio_write_done(void *opaque, int ret)
{
    struct aio_ctx *ctx = opaque;
    struct timeval t2;

    gettimeofday(&t2, NULL);


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

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

    /* 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);
out:
    qemu_io_free(ctx->buf);
    qemu_iovec_destroy(&ctx->qiov);
    g_free(ctx);
}

static void aio_read_done(void *opaque, int ret)
{
    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 = g_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);
        }
        g_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);
out:
    qemu_io_free(ctx->buf);
    qemu_iovec_destroy(&ctx->qiov);
    g_free(ctx);
}

static void aio_read_help(void)
{
    printf(
"\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"
" The read is performed asynchronously and the aio_flush command must be\n"
" used to ensure all outstanding aio requests have been completed.\n"
" -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"
" -q, -- quiet mode, do not show I/O statistics\n"
"\n");
}

static int aio_read_f(BlockDriverState *bs, int argc, char **argv);

static const cmdinfo_t aio_read_cmd = {
    .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,
};

static int aio_read_f(BlockDriverState *bs, int argc, char **argv)
{
    int nr_iov, c;
    struct aio_ctx *ctx = g_new0(struct aio_ctx, 1);

    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) {
                g_free(ctx);
                return 0;
            }
            break;
        case 'q':
            ctx->qflag = 1;
            break;
        case 'v':
            ctx->vflag = 1;
            break;
        default:
            g_free(ctx);
1477
            return qemuio_command_usage(&aio_read_cmd);
1478 1479 1480 1481 1482
        }
    }

    if (optind > argc - 2) {
        g_free(ctx);
1483
        return qemuio_command_usage(&aio_read_cmd);
1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568
    }

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

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

    nr_iov = argc - optind;
    ctx->buf = create_iovec(bs, &ctx->qiov, &argv[optind], nr_iov, 0xab);
    if (ctx->buf == NULL) {
        g_free(ctx);
        return 0;
    }

    gettimeofday(&ctx->t1, NULL);
    bdrv_aio_readv(bs, ctx->offset >> 9, &ctx->qiov,
                   ctx->qiov.size >> 9, aio_read_done, ctx);
    return 0;
}

static void aio_write_help(void)
{
    printf(
"\n"
" asynchronously writes a range of bytes from the given offset source\n"
" 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"
" The write is performed asynchronously and the aio_flush command must be\n"
" used to ensure all outstanding aio requests have been completed.\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 aio_write_f(BlockDriverState *bs, int argc, char **argv);

static const cmdinfo_t aio_write_cmd = {
    .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,
};

static int aio_write_f(BlockDriverState *bs, int argc, char **argv)
{
    int nr_iov, c;
    int pattern = 0xcd;
    struct aio_ctx *ctx = g_new0(struct aio_ctx, 1);

    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) {
                g_free(ctx);
                return 0;
            }
            break;
        default:
            g_free(ctx);
1569
            return qemuio_command_usage(&aio_write_cmd);
1570 1571 1572 1573 1574
        }
    }

    if (optind > argc - 2) {
        g_free(ctx);
1575
        return qemuio_command_usage(&aio_write_cmd);
1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688
    }

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

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

    nr_iov = argc - optind;
    ctx->buf = create_iovec(bs, &ctx->qiov, &argv[optind], nr_iov, pattern);
    if (ctx->buf == NULL) {
        g_free(ctx);
        return 0;
    }

    gettimeofday(&ctx->t1, NULL);
    bdrv_aio_writev(bs, ctx->offset >> 9, &ctx->qiov,
                    ctx->qiov.size >> 9, aio_write_done, ctx);
    return 0;
}

static int aio_flush_f(BlockDriverState *bs, int argc, char **argv)
{
    bdrv_drain_all();
    return 0;
}

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

static int flush_f(BlockDriverState *bs, int argc, char **argv)
{
    bdrv_flush(bs);
    return 0;
}

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

static int truncate_f(BlockDriverState *bs, int argc, char **argv)
{
    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;
}

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

static int length_f(BlockDriverState *bs, int argc, char **argv)
{
    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;
}


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


static int info_f(BlockDriverState *bs, int argc, char **argv)
{
    BlockDriverInfo bdi;
1689
    ImageInfoSpecific *spec_info;
1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710
    char s1[64], s2[64];
    int ret;

    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);
    }

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

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

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

1711 1712 1713 1714 1715 1716 1717
    spec_info = bdrv_get_specific_info(bs);
    if (spec_info) {
        printf("Format specific information:\n");
        bdrv_image_info_specific_dump(fprintf, stdout, spec_info);
        qapi_free_ImageInfoSpecific(spec_info);
    }

1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774
    return 0;
}



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

static void discard_help(void)
{
    printf(
"\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"
" -q, -- quiet mode, do not show I/O statistics\n"
"\n");
}

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

static const cmdinfo_t discard_cmd = {
    .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,
};

static int discard_f(BlockDriverState *bs, int argc, char **argv)
{
    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:
1775
            return qemuio_command_usage(&discard_cmd);
1776 1777 1778 1779
        }
    }

    if (optind != argc - 2) {
1780
        return qemuio_command_usage(&discard_cmd);
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 1811 1812 1813 1814 1815 1816 1817 1818 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
    }

    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);
    }

out:
    return 0;
}

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

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

    if (argc == 3) {
        nb_sectors = cvtnum(argv[2]);
        if (nb_sectors < 0) {
            printf("non-numeric length argument -- %s\n", argv[2]);
            return 0;
        }
    } else {
        nb_sectors = 1;
    }

    remaining = nb_sectors;
    sum_alloc = 0;
    sector_num = offset >> 9;
    while (remaining) {
        ret = bdrv_is_allocated(bs, sector_num, remaining, &num);
1849 1850 1851 1852
        if (ret < 0) {
            printf("is_allocated failed: %s\n", strerror(-ret));
            return 0;
        }
1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902
        sector_num += num;
        remaining -= num;
        if (ret) {
            sum_alloc += num;
        }
        if (num == 0) {
            nb_sectors -= remaining;
            remaining = 0;
        }
    }

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

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

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


static int map_is_allocated(BlockDriverState *bs, int64_t sector_num,
                            int64_t nb_sectors, int64_t *pnum)
{
    int num, num_checked;
    int ret, firstret;

    num_checked = MIN(nb_sectors, INT_MAX);
    ret = bdrv_is_allocated(bs, sector_num, num_checked, &num);
    if (ret < 0) {
        return ret;
    }

    firstret = ret;
    *pnum = num;

    while (nb_sectors > 0 && ret == firstret) {
        sector_num += num;
        nb_sectors -= num;

        num_checked = MIN(nb_sectors, INT_MAX);
        ret = bdrv_is_allocated(bs, sector_num, num_checked, &num);
1903
        if (ret == firstret && num) {
1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929
            *pnum += num;
        } else {
            break;
        }
    }

    return firstret;
}

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

    offset = 0;
    nb_sectors = bs->total_sectors;

    do {
        ret = map_is_allocated(bs, offset, nb_sectors, &num);
        if (ret < 0) {
            error_report("Failed to get allocation status: %s", strerror(-ret));
            return 0;
1930 1931 1932
        } else if (!num) {
            error_report("Unexpected end of image");
            return 0;
1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968
        }

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

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

    return 0;
}

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

static int break_f(BlockDriverState *bs, int argc, char **argv)
{
    int ret;

    ret = bdrv_debug_breakpoint(bs, argv[1], argv[2]);
    if (ret < 0) {
        printf("Could not set breakpoint: %s\n", strerror(-ret));
    }

    return 0;
}

1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980
static int remove_break_f(BlockDriverState *bs, int argc, char **argv)
{
    int ret;

    ret = bdrv_debug_remove_breakpoint(bs, argv[1]);
    if (ret < 0) {
        printf("Could not remove breakpoint %s: %s\n", argv[1], strerror(-ret));
    }

    return 0;
}

1981 1982 1983 1984 1985 1986 1987 1988 1989 1990
static const cmdinfo_t break_cmd = {
       .name           = "break",
       .argmin         = 2,
       .argmax         = 2,
       .cfunc          = break_f,
       .args           = "event tag",
       .oneline        = "sets a breakpoint on event and tags the stopped "
                         "request as tag",
};

1991 1992 1993 1994 1995 1996 1997 1998 1999
static const cmdinfo_t remove_break_cmd = {
       .name           = "remove_break",
       .argmin         = 1,
       .argmax         = 1,
       .cfunc          = remove_break_f,
       .args           = "tag",
       .oneline        = "remove a breakpoint by tag",
};

2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023
static int resume_f(BlockDriverState *bs, int argc, char **argv)
{
    int ret;

    ret = bdrv_debug_resume(bs, argv[1]);
    if (ret < 0) {
        printf("Could not resume request: %s\n", strerror(-ret));
    }

    return 0;
}

static const cmdinfo_t resume_cmd = {
       .name           = "resume",
       .argmin         = 1,
       .argmax         = 1,
       .cfunc          = resume_f,
       .args           = "tag",
       .oneline        = "resumes the request tagged as tag",
};

static int wait_break_f(BlockDriverState *bs, int argc, char **argv)
{
    while (!bdrv_debug_is_suspended(bs, argv[1])) {
2024
        aio_poll(bdrv_get_aio_context(bs), true);
2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050
    }

    return 0;
}

static const cmdinfo_t wait_break_cmd = {
       .name           = "wait_break",
       .argmin         = 1,
       .argmax         = 1,
       .cfunc          = wait_break_f,
       .args           = "tag",
       .oneline        = "waits for the suspension of a request",
};

static int abort_f(BlockDriverState *bs, int argc, char **argv)
{
    abort();
}

static const cmdinfo_t abort_cmd = {
       .name           = "abort",
       .cfunc          = abort_f,
       .flags          = CMD_NOFILE_OK,
       .oneline        = "simulate a program crash using abort(3)",
};

2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090
static void sleep_cb(void *opaque)
{
    bool *expired = opaque;
    *expired = true;
}

static int sleep_f(BlockDriverState *bs, int argc, char **argv)
{
    char *endptr;
    long ms;
    struct QEMUTimer *timer;
    bool expired = false;

    ms = strtol(argv[1], &endptr, 0);
    if (ms < 0 || *endptr != '\0') {
        printf("%s is not a valid number\n", argv[1]);
        return 0;
    }

    timer = timer_new_ns(QEMU_CLOCK_HOST, sleep_cb, &expired);
    timer_mod(timer, qemu_clock_get_ns(QEMU_CLOCK_HOST) + SCALE_MS * ms);

    while (!expired) {
        main_loop_wait(false);
    }

    timer_free(timer);

    return 0;
}

static const cmdinfo_t sleep_cmd = {
       .name           = "sleep",
       .argmin         = 1,
       .argmax         = 1,
       .cfunc          = sleep_f,
       .flags          = CMD_NOFILE_OK,
       .oneline        = "waits for the given value in milliseconds",
};

2091 2092 2093 2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108 2109 2110 2111 2112 2113 2114 2115 2116 2117 2118 2119 2120 2121 2122 2123 2124 2125 2126 2127 2128 2129 2130 2131 2132 2133 2134 2135 2136 2137 2138 2139 2140 2141 2142 2143 2144 2145 2146 2147 2148 2149 2150 2151 2152 2153 2154 2155
static void help_oneline(const char *cmd, const cmdinfo_t *ct)
{
    if (cmd) {
        printf("%s ", cmd);
    } else {
        printf("%s ", ct->name);
        if (ct->altname) {
            printf("(or %s) ", ct->altname);
        }
    }

    if (ct->args) {
        printf("%s ", ct->args);
    }
    printf("-- %s\n", ct->oneline);
}

static void help_onecmd(const char *cmd, const cmdinfo_t *ct)
{
    help_oneline(cmd, ct);
    if (ct->help) {
        ct->help();
    }
}

static void help_all(void)
{
    const cmdinfo_t *ct;

    for (ct = cmdtab; ct < &cmdtab[ncmds]; ct++) {
        help_oneline(ct->name, ct);
    }
    printf("\nUse 'help commandname' for extended help.\n");
}

static int help_f(BlockDriverState *bs, int argc, char **argv)
{
    const cmdinfo_t *ct;

    if (argc == 1) {
        help_all();
        return 0;
    }

    ct = find_command(argv[1]);
    if (ct == NULL) {
        printf("command %s not found\n", argv[1]);
        return 0;
    }

    help_onecmd(argv[1], ct);
    return 0;
}

static const cmdinfo_t help_cmd = {
    .name       = "help",
    .altname    = "?",
    .cfunc      = help_f,
    .argmin     = 0,
    .argmax     = 1,
    .flags      = CMD_FLAG_GLOBAL,
    .args       = "[command]",
    .oneline    = "help for one or all commands",
};

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bool qemuio_command(BlockDriverState *bs, const char *cmd)
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{
    char *input;
    const cmdinfo_t *ct;
    char **v;
    int c;
    bool done = false;

    input = g_strdup(cmd);
    v = breakline(input, &c);
    if (c) {
        ct = find_command(v[0]);
        if (ct) {
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            done = command(bs, ct, c, v);
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        } else {
            fprintf(stderr, "command \"%s\" not found\n", v[0]);
        }
    }
    g_free(input);
    g_free(v);

    return done;
}

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static void __attribute((constructor)) init_qemuio_commands(void)
{
    /* initialize commands */
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    qemuio_add_command(&help_cmd);
    qemuio_add_command(&read_cmd);
    qemuio_add_command(&readv_cmd);
    qemuio_add_command(&write_cmd);
    qemuio_add_command(&writev_cmd);
    qemuio_add_command(&multiwrite_cmd);
    qemuio_add_command(&aio_read_cmd);
    qemuio_add_command(&aio_write_cmd);
    qemuio_add_command(&aio_flush_cmd);
    qemuio_add_command(&flush_cmd);
    qemuio_add_command(&truncate_cmd);
    qemuio_add_command(&length_cmd);
    qemuio_add_command(&info_cmd);
    qemuio_add_command(&discard_cmd);
    qemuio_add_command(&alloc_cmd);
    qemuio_add_command(&map_cmd);
    qemuio_add_command(&break_cmd);
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    qemuio_add_command(&remove_break_cmd);
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    qemuio_add_command(&resume_cmd);
    qemuio_add_command(&wait_break_cmd);
    qemuio_add_command(&abort_cmd);
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    qemuio_add_command(&sleep_cmd);
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}