Adding qemu as a submodule of KVMFORNFV

This Patch includes the changes to add qemu as a submodule to
kvmfornfv repo and make use of the updated latest qemu for the
execution of all testcase
Change-Id: I1280af507a857675c7f81d30c95255635667bdd7
Signed-off-by:RajithaY<rajithax.yerrumsetty@intel.com>

1 files changed, 0 insertions, 2497 deletions

diff --git a/qemu/qemu-io-cmds.c b/qemu/qemu-io-cmds.c
deleted file mode 100644
index e34f77711..000000000
--- a/qemu/qemu-io-cmds.c
+++ /dev/null
@@ -1,2497 +0,0 @@
-/*
- * 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.
- */
-
-#include "qemu/osdep.h"
-#include "qapi/error.h"
-#include "qemu-io.h"
-#include "sysemu/block-backend.h"
-#include "block/block.h"
-#include "block/block_int.h" /* for info_f() */
-#include "block/qapi.h"
-#include "qemu/error-report.h"
-#include "qemu/main-loop.h"
-#include "qemu/timer.h"
-#include "sysemu/block-backend.h"
-#include "qemu/cutils.h"
-
-#define CMD_NOFILE_OK   0x01
-
-bool qemuio_misalign;
-
-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)
-{
-    cmdtab = g_renew(cmdinfo_t, cmdtab, ++ncmds);
-    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(BlockBackend *blk, const cmdinfo_t *ct)
-{
-    if (ct->flags & CMD_FLAG_GLOBAL) {
-        return 1;
-    }
-    if (!(ct->flags & CMD_NOFILE_OK) && !blk) {
-        fprintf(stderr, "no file open, try 'help open'\n");
-        return 0;
-    }
-    return 1;
-}
-
-static int command(BlockBackend *blk, const cmdinfo_t *ct, int argc,
-                   char **argv)
-{
-    char *cmd = argv[0];
-
-    if (!init_check_command(blk, ct)) {
-        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;
-    return ct->cfunc(blk, argc, argv);
-}
-
-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;
-}
-
-/* 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);
-        }
-    }
-}
-
-static char **breakline(char *input, int *count)
-{
-    int c = 0;
-    char *p;
-    char **rval = g_new0(char *, 1);
-
-    while (rval && (p = qemu_strsep(&input, " ")) != NULL) {
-        if (!*p) {
-            continue;
-        }
-        c++;
-        rval = g_renew(char *, rval, (c + 1));
-        rval[c - 1] = p;
-        rval[c] = NULL;
-    }
-    *count = c;
-    return rval;
-}
-
-static int64_t cvtnum(const char *s)
-{
-    char *end;
-    int64_t ret;
-
-    ret = qemu_strtosz_suffix(s, &end, QEMU_STRTOSZ_DEFSUFFIX_B);
-    if (*end != '\0') {
-        /* Detritus at the end of the string */
-        return -EINVAL;
-    }
-    return ret;
-}
-
-static void print_cvtnum_err(int64_t rc, const char *arg)
-{
-    switch (rc) {
-    case -EINVAL:
-        printf("Parsing error: non-numeric argument,"
-               " or extraneous/unrecognized suffix -- %s\n", arg);
-        break;
-    case -ERANGE:
-        printf("Parsing error: argument too large -- %s\n", arg);
-        break;
-    default:
-        printf("Parsing error: %s\n", arg);
-    }
-}
-
-#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));
-    }
-}
-
-/*
- * 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(BlockBackend *blk, size_t len, int pattern)
-{
-    void *buf;
-
-    if (qemuio_misalign) {
-        len += MISALIGN_OFFSET;
-    }
-    buf = blk_blockalign(blk, 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, int64_t len)
-{
-    uint64_t i;
-    int 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,
-                         int64_t count, int64_t 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 %"PRId64"/%"PRId64" 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("%"PRId64",%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(BlockBackend *blk, 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) {
-            print_cvtnum_err(len, arg);
-            goto fail;
-        }
-
-        /* should be SIZE_T_MAX, but that doesn't exist */
-        if (len > INT_MAX) {
-            printf("Argument '%s' exceeds maximum size %d\n", arg, INT_MAX);
-            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(blk, 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(BlockBackend *blk, char *buf, int64_t offset, int64_t count,
-                   int64_t *total)
-{
-    int ret;
-
-    if (count >> 9 > INT_MAX) {
-        return -ERANGE;
-    }
-
-    ret = blk_read(blk, offset >> 9, (uint8_t *)buf, count >> 9);
-    if (ret < 0) {
-        return ret;
-    }
-    *total = count;
-    return 1;
-}
-
-static int do_write(BlockBackend *blk, char *buf, int64_t offset, int64_t count,
-                    int64_t *total)
-{
-    int ret;
-
-    if (count >> 9 > INT_MAX) {
-        return -ERANGE;
-    }
-
-    ret = blk_write(blk, offset >> 9, (uint8_t *)buf, count >> 9);
-    if (ret < 0) {
-        return ret;
-    }
-    *total = count;
-    return 1;
-}
-
-static int do_pread(BlockBackend *blk, char *buf, int64_t offset,
-                    int64_t count, int64_t *total)
-{
-    if (count > INT_MAX) {
-        return -ERANGE;
-    }
-
-    *total = blk_pread(blk, offset, (uint8_t *)buf, count);
-    if (*total < 0) {
-        return *total;
-    }
-    return 1;
-}
-
-static int do_pwrite(BlockBackend *blk, char *buf, int64_t offset,
-                     int64_t count, int64_t *total)
-{
-    if (count > INT_MAX) {
-        return -ERANGE;
-    }
-
-    *total = blk_pwrite(blk, offset, (uint8_t *)buf, count);
-    if (*total < 0) {
-        return *total;
-    }
-    return 1;
-}
-
-typedef struct {
-    BlockBackend *blk;
-    int64_t offset;
-    int64_t count;
-    int64_t *total;
-    int ret;
-    bool done;
-} CoWriteZeroes;
-
-static void coroutine_fn co_write_zeroes_entry(void *opaque)
-{
-    CoWriteZeroes *data = opaque;
-
-    data->ret = blk_co_write_zeroes(data->blk, data->offset / BDRV_SECTOR_SIZE,
-                                    data->count / BDRV_SECTOR_SIZE, 0);
-    data->done = true;
-    if (data->ret < 0) {
-        *data->total = data->ret;
-        return;
-    }
-
-    *data->total = data->count;
-}
-
-static int do_co_write_zeroes(BlockBackend *blk, int64_t offset, int64_t count,
-                              int64_t *total)
-{
-    Coroutine *co;
-    CoWriteZeroes data = {
-        .blk    = blk,
-        .offset = offset,
-        .count  = count,
-        .total  = total,
-        .done   = false,
-    };
-
-    if (count >> BDRV_SECTOR_BITS > INT_MAX) {
-        return -ERANGE;
-    }
-
-    co = qemu_coroutine_create(co_write_zeroes_entry);
-    qemu_coroutine_enter(co, &data);
-    while (!data.done) {
-        aio_poll(blk_get_aio_context(blk), true);
-    }
-    if (data.ret < 0) {
-        return data.ret;
-    } else {
-        return 1;
-    }
-}
-
-static int do_write_compressed(BlockBackend *blk, char *buf, int64_t offset,
-                               int64_t count, int64_t *total)
-{
-    int ret;
-
-    if (count >> 9 > INT_MAX) {
-        return -ERANGE;
-    }
-
-    ret = blk_write_compressed(blk, offset >> 9, (uint8_t *)buf, count >> 9);
-    if (ret < 0) {
-        return ret;
-    }
-    *total = count;
-    return 1;
-}
-
-static int do_load_vmstate(BlockBackend *blk, char *buf, int64_t offset,
-                           int64_t count, int64_t *total)
-{
-    if (count > INT_MAX) {
-        return -ERANGE;
-    }
-
-    *total = blk_load_vmstate(blk, (uint8_t *)buf, offset, count);
-    if (*total < 0) {
-        return *total;
-    }
-    return 1;
-}
-
-static int do_save_vmstate(BlockBackend *blk, char *buf, int64_t offset,
-                           int64_t count, int64_t *total)
-{
-    if (count > INT_MAX) {
-        return -ERANGE;
-    }
-
-    *total = blk_save_vmstate(blk, (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(BlockBackend *blk, QEMUIOVector *qiov,
-                        int64_t offset, int *total)
-{
-    int async_ret = NOT_DONE;
-
-    blk_aio_readv(blk, 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(BlockBackend *blk, QEMUIOVector *qiov,
-                         int64_t offset, int *total)
-{
-    int async_ret = NOT_DONE;
-
-    blk_aio_writev(blk, 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(BlockBackend *blk, 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 = blk_aio_multiwrite(blk, 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 blk_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(BlockBackend *blk, 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(BlockBackend *blk, 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;
-    int64_t count;
-    /* Some compilers get confused and warn if this is not initialized.  */
-    int64_t total = 0;
-    int pattern = 0;
-    int64_t pattern_offset = 0, pattern_count = 0;
-
-    while ((c = getopt(argc, argv, "bCl:pP:qs:v")) != -1) {
-        switch (c) {
-        case 'b':
-            bflag = 1;
-            break;
-        case 'C':
-            Cflag = 1;
-            break;
-        case 'l':
-            lflag = 1;
-            pattern_count = cvtnum(optarg);
-            if (pattern_count < 0) {
-                print_cvtnum_err(pattern_count, 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) {
-                print_cvtnum_err(pattern_offset, optarg);
-                return 0;
-            }
-            break;
-        case 'v':
-            vflag = 1;
-            break;
-        default:
-            return qemuio_command_usage(&read_cmd);
-        }
-    }
-
-    if (optind != argc - 2) {
-        return qemuio_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) {
-        print_cvtnum_err(offset, argv[optind]);
-        return 0;
-    }
-
-    optind++;
-    count = cvtnum(argv[optind]);
-    if (count < 0) {
-        print_cvtnum_err(count, argv[optind]);
-        return 0;
-    } else if (count > SIZE_MAX) {
-        printf("length cannot exceed %" PRIu64 ", given %s\n",
-               (uint64_t) SIZE_MAX, argv[optind]);
-        return 0;
-    }
-
-    if (!Pflag && (lflag || sflag)) {
-        return qemuio_command_usage(&read_cmd);
-    }
-
-    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 %"PRId64" is not sector aligned\n",
-                   count);
-            return 0;
-        }
-    }
-
-    buf = qemu_io_alloc(blk, count, 0xab);
-
-    gettimeofday(&t1, NULL);
-    if (pflag) {
-        cnt = do_pread(blk, buf, offset, count, &total);
-    } else if (bflag) {
-        cnt = do_load_vmstate(blk, buf, offset, count, &total);
-    } else {
-        cnt = do_read(blk, 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 ", %"PRId64" 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(BlockBackend *blk, 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(BlockBackend *blk, 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")) != -1) {
-        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 qemuio_command_usage(&readv_cmd);
-        }
-    }
-
-    if (optind > argc - 2) {
-        return qemuio_command_usage(&readv_cmd);
-    }
-
-
-    offset = cvtnum(argv[optind]);
-    if (offset < 0) {
-        print_cvtnum_err(offset, 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(blk, &qiov, &argv[optind], nr_iov, 0xab);
-    if (buf == NULL) {
-        return 0;
-    }
-
-    gettimeofday(&t1, NULL);
-    cnt = do_aio_readv(blk, &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 blk_write_compressed\n"
-" -p, -- use blk_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 blk_co_write_zeroes\n"
-"\n");
-}
-
-static int write_f(BlockBackend *blk, 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(BlockBackend *blk, 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;
-    int64_t count;
-    /* Some compilers get confused and warn if this is not initialized.  */
-    int64_t total = 0;
-    int pattern = 0xcd;
-
-    while ((c = getopt(argc, argv, "bcCpP:qz")) != -1) {
-        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:
-            return qemuio_command_usage(&write_cmd);
-        }
-    }
-
-    if (optind != argc - 2) {
-        return qemuio_command_usage(&write_cmd);
-    }
-
-    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) {
-        print_cvtnum_err(offset, argv[optind]);
-        return 0;
-    }
-
-    optind++;
-    count = cvtnum(argv[optind]);
-    if (count < 0) {
-        print_cvtnum_err(count, argv[optind]);
-        return 0;
-    } else if (count > SIZE_MAX) {
-        printf("length cannot exceed %" PRIu64 ", given %s\n",
-               (uint64_t) SIZE_MAX, 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 %"PRId64" is not sector aligned\n",
-                   count);
-            return 0;
-        }
-    }
-
-    if (!zflag) {
-        buf = qemu_io_alloc(blk, count, pattern);
-    }
-
-    gettimeofday(&t1, NULL);
-    if (pflag) {
-        cnt = do_pwrite(blk, buf, offset, count, &total);
-    } else if (bflag) {
-        cnt = do_save_vmstate(blk, buf, offset, count, &total);
-    } else if (zflag) {
-        cnt = do_co_write_zeroes(blk, offset, count, &total);
-    } else if (cflag) {
-        cnt = do_write_compressed(blk, buf, offset, count, &total);
-    } else {
-        cnt = do_write(blk, 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"
-" 'writev 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"
-" -q, -- quiet mode, do not show I/O statistics\n"
-"\n");
-}
-
-static int writev_f(BlockBackend *blk, 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(BlockBackend *blk, 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:")) != -1) {
-        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 qemuio_command_usage(&writev_cmd);
-        }
-    }
-
-    if (optind > argc - 2) {
-        return qemuio_command_usage(&writev_cmd);
-    }
-
-    offset = cvtnum(argv[optind]);
-    if (offset < 0) {
-        print_cvtnum_err(offset, 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(blk, &qiov, &argv[optind], nr_iov, pattern);
-    if (buf == NULL) {
-        return 0;
-    }
-
-    gettimeofday(&t1, NULL);
-    cnt = do_aio_writev(blk, &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(BlockBackend *blk, 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(BlockBackend *blk, 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:")) != -1) {
-        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 qemuio_command_usage(&writev_cmd);
-        }
-    }
-
-    if (optind > argc - 2) {
-        return qemuio_command_usage(&writev_cmd);
-    }
-
-    nr_reqs = 1;
-    for (i = optind; i < argc; i++) {
-        if (!strcmp(argv[i], ";")) {
-            nr_reqs++;
-        }
-    }
-
-    reqs = g_new0(BlockRequest, nr_reqs);
-    buf = g_new0(char *, nr_reqs);
-    qiovs = g_new(QEMUIOVector, nr_reqs);
-
-    for (i = 0; i < nr_reqs && optind < argc; i++) {
-        int j;
-
-        /* Read the offset of the request */
-        offset = cvtnum(argv[optind]);
-        if (offset < 0) {
-            print_cvtnum_err(offset, 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(blk, &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(blk, 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 {
-    BlockBackend *blk;
-    QEMUIOVector qiov;
-    int64_t offset;
-    char *buf;
-    int qflag;
-    int vflag;
-    int Cflag;
-    int Pflag;
-    int zflag;
-    BlockAcctCookie acct;
-    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));
-        block_acct_failed(blk_get_stats(ctx->blk), &ctx->acct);
-        goto out;
-    }
-
-    block_acct_done(blk_get_stats(ctx->blk), &ctx->acct);
-
-    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:
-    if (!ctx->zflag) {
-        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));
-        block_acct_failed(blk_get_stats(ctx->blk), &ctx->acct);
-        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);
-    }
-
-    block_acct_done(blk_get_stats(ctx->blk), &ctx->acct);
-
-    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(BlockBackend *blk, 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(BlockBackend *blk, int argc, char **argv)
-{
-    int nr_iov, c;
-    struct aio_ctx *ctx = g_new0(struct aio_ctx, 1);
-
-    ctx->blk = blk;
-    while ((c = getopt(argc, argv, "CP:qv")) != -1) {
-        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);
-            return qemuio_command_usage(&aio_read_cmd);
-        }
-    }
-
-    if (optind > argc - 2) {
-        g_free(ctx);
-        return qemuio_command_usage(&aio_read_cmd);
-    }
-
-    ctx->offset = cvtnum(argv[optind]);
-    if (ctx->offset < 0) {
-        print_cvtnum_err(ctx->offset, argv[optind]);
-        g_free(ctx);
-        return 0;
-    }
-    optind++;
-
-    if (ctx->offset & 0x1ff) {
-        printf("offset %" PRId64 " is not sector aligned\n",
-               ctx->offset);
-        block_acct_invalid(blk_get_stats(blk), BLOCK_ACCT_READ);
-        g_free(ctx);
-        return 0;
-    }
-
-    nr_iov = argc - optind;
-    ctx->buf = create_iovec(blk, &ctx->qiov, &argv[optind], nr_iov, 0xab);
-    if (ctx->buf == NULL) {
-        block_acct_invalid(blk_get_stats(blk), BLOCK_ACCT_READ);
-        g_free(ctx);
-        return 0;
-    }
-
-    gettimeofday(&ctx->t1, NULL);
-    block_acct_start(blk_get_stats(blk), &ctx->acct, ctx->qiov.size,
-                     BLOCK_ACCT_READ);
-    blk_aio_readv(blk, 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"
-" -z, -- write zeroes using blk_aio_write_zeroes\n"
-"\n");
-}
-
-static int aio_write_f(BlockBackend *blk, int argc, char **argv);
-
-static const cmdinfo_t aio_write_cmd = {
-    .name       = "aio_write",
-    .cfunc      = aio_write_f,
-    .argmin     = 2,
-    .argmax     = -1,
-    .args       = "[-Cqz] [-P pattern ] off len [len..]",
-    .oneline    = "asynchronously writes a number of bytes",
-    .help       = aio_write_help,
-};
-
-static int aio_write_f(BlockBackend *blk, int argc, char **argv)
-{
-    int nr_iov, c;
-    int pattern = 0xcd;
-    struct aio_ctx *ctx = g_new0(struct aio_ctx, 1);
-
-    ctx->blk = blk;
-    while ((c = getopt(argc, argv, "CqP:z")) != -1) {
-        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;
-        case 'z':
-            ctx->zflag = 1;
-            break;
-        default:
-            g_free(ctx);
-            return qemuio_command_usage(&aio_write_cmd);
-        }
-    }
-
-    if (optind > argc - 2) {
-        g_free(ctx);
-        return qemuio_command_usage(&aio_write_cmd);
-    }
-
-    if (ctx->zflag && optind != argc - 2) {
-        printf("-z supports only a single length parameter\n");
-        g_free(ctx);
-        return 0;
-    }
-
-    if (ctx->zflag && ctx->Pflag) {
-        printf("-z and -P cannot be specified at the same time\n");
-        g_free(ctx);
-        return 0;
-    }
-
-    ctx->offset = cvtnum(argv[optind]);
-    if (ctx->offset < 0) {
-        print_cvtnum_err(ctx->offset, argv[optind]);
-        g_free(ctx);
-        return 0;
-    }
-    optind++;
-
-    if (ctx->offset & 0x1ff) {
-        printf("offset %" PRId64 " is not sector aligned\n",
-               ctx->offset);
-        block_acct_invalid(blk_get_stats(blk), BLOCK_ACCT_WRITE);
-        g_free(ctx);
-        return 0;
-    }
-
-    if (ctx->zflag) {
-        int64_t count = cvtnum(argv[optind]);
-        if (count < 0) {
-            print_cvtnum_err(count, argv[optind]);
-            return 0;
-        }
-
-        ctx->qiov.size = count;
-        blk_aio_write_zeroes(blk, ctx->offset >> 9, count >> 9, 0,
-                             aio_write_done, ctx);
-    } else {
-        nr_iov = argc - optind;
-        ctx->buf = create_iovec(blk, &ctx->qiov, &argv[optind], nr_iov,
-                                pattern);
-        if (ctx->buf == NULL) {
-            block_acct_invalid(blk_get_stats(blk), BLOCK_ACCT_WRITE);
-            g_free(ctx);
-            return 0;
-        }
-
-        gettimeofday(&ctx->t1, NULL);
-        block_acct_start(blk_get_stats(blk), &ctx->acct, ctx->qiov.size,
-                         BLOCK_ACCT_WRITE);
-
-        blk_aio_writev(blk, ctx->offset >> 9, &ctx->qiov,
-                       ctx->qiov.size >> 9, aio_write_done, ctx);
-    }
-    return 0;
-}
-
-static int aio_flush_f(BlockBackend *blk, int argc, char **argv)
-{
-    BlockAcctCookie cookie;
-    block_acct_start(blk_get_stats(blk), &cookie, 0, BLOCK_ACCT_FLUSH);
-    blk_drain_all();
-    block_acct_done(blk_get_stats(blk), &cookie);
-    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(BlockBackend *blk, int argc, char **argv)
-{
-    blk_flush(blk);
-    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(BlockBackend *blk, int argc, char **argv)
-{
-    int64_t offset;
-    int ret;
-
-    offset = cvtnum(argv[1]);
-    if (offset < 0) {
-        print_cvtnum_err(offset, argv[1]);
-        return 0;
-    }
-
-    ret = blk_truncate(blk, 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(BlockBackend *blk, int argc, char **argv)
-{
-    int64_t size;
-    char s1[64];
-
-    size = blk_getlength(blk);
-    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(BlockBackend *blk, int argc, char **argv)
-{
-    BlockDriverState *bs = blk_bs(blk);
-    BlockDriverInfo bdi;
-    ImageInfoSpecific *spec_info;
-    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);
-
-    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);
-    }
-
-    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(BlockBackend *blk, 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(BlockBackend *blk, int argc, char **argv)
-{
-    struct timeval t1, t2;
-    int Cflag = 0, qflag = 0;
-    int c, ret;
-    int64_t offset, count;
-
-    while ((c = getopt(argc, argv, "Cq")) != -1) {
-        switch (c) {
-        case 'C':
-            Cflag = 1;
-            break;
-        case 'q':
-            qflag = 1;
-            break;
-        default:
-            return qemuio_command_usage(&discard_cmd);
-        }
-    }
-
-    if (optind != argc - 2) {
-        return qemuio_command_usage(&discard_cmd);
-    }
-
-    offset = cvtnum(argv[optind]);
-    if (offset < 0) {
-        print_cvtnum_err(offset, argv[optind]);
-        return 0;
-    }
-
-    optind++;
-    count = cvtnum(argv[optind]);
-    if (count < 0) {
-        print_cvtnum_err(count, argv[optind]);
-        return 0;
-    } else if (count >> BDRV_SECTOR_BITS > INT_MAX) {
-        printf("length cannot exceed %"PRIu64", given %s\n",
-               (uint64_t)INT_MAX << BDRV_SECTOR_BITS,
-               argv[optind]);
-        return 0;
-    }
-
-    gettimeofday(&t1, NULL);
-    ret = blk_discard(blk, 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(BlockBackend *blk, int argc, char **argv)
-{
-    BlockDriverState *bs = blk_bs(blk);
-    int64_t offset, sector_num, nb_sectors, remaining;
-    char s1[64];
-    int num, ret;
-    int64_t sum_alloc;
-
-    offset = cvtnum(argv[1]);
-    if (offset < 0) {
-        print_cvtnum_err(offset, 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) {
-            print_cvtnum_err(nb_sectors, argv[2]);
-            return 0;
-        } else if (nb_sectors > INT_MAX) {
-            printf("length argument cannot exceed %d, given %s\n",
-                   INT_MAX, 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);
-        if (ret < 0) {
-            printf("is_allocated failed: %s\n", strerror(-ret));
-            return 0;
-        }
-        sector_num += num;
-        remaining -= num;
-        if (ret) {
-            sum_alloc += num;
-        }
-        if (num == 0) {
-            nb_sectors -= remaining;
-            remaining = 0;
-        }
-    }
-
-    cvtstr(offset, s1, sizeof(s1));
-
-    printf("%"PRId64"/%"PRId64" 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);
-        if (ret == firstret && num) {
-            *pnum += num;
-        } else {
-            break;
-        }
-    }
-
-    return firstret;
-}
-
-static int map_f(BlockBackend *blk, int argc, char **argv)
-{
-    int64_t offset;
-    int64_t nb_sectors, total_sectors;
-    char s1[64];
-    int64_t num;
-    int ret;
-    const char *retstr;
-
-    offset = 0;
-    total_sectors = blk_nb_sectors(blk);
-    if (total_sectors < 0) {
-        error_report("Failed to query image length: %s",
-                     strerror(-total_sectors));
-        return 0;
-    }
-
-    nb_sectors = total_sectors;
-
-    do {
-        ret = map_is_allocated(blk_bs(blk), offset, nb_sectors, &num);
-        if (ret < 0) {
-            error_report("Failed to get allocation status: %s", strerror(-ret));
-            return 0;
-        } else if (!num) {
-            error_report("Unexpected end of image");
-            return 0;
-        }
-
-        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 < 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 void reopen_help(void)
-{
-    printf(
-"\n"
-" Changes the open options of an already opened image\n"
-"\n"
-" Example:\n"
-" 'reopen -o lazy-refcounts=on' - activates lazy refcount writeback on a qcow2 image\n"
-"\n"
-" -r, -- Reopen the image read-only\n"
-" -c, -- Change the cache mode to the given value\n"
-" -o, -- Changes block driver options (cf. 'open' command)\n"
-"\n");
-}
-
-static int reopen_f(BlockBackend *blk, int argc, char **argv);
-
-static QemuOptsList reopen_opts = {
-    .name = "reopen",
-    .merge_lists = true,
-    .head = QTAILQ_HEAD_INITIALIZER(reopen_opts.head),
-    .desc = {
-        /* no elements => accept any params */
-        { /* end of list */ }
-    },
-};
-
-static const cmdinfo_t reopen_cmd = {
-       .name           = "reopen",
-       .argmin         = 0,
-       .argmax         = -1,
-       .cfunc          = reopen_f,
-       .args           = "[-r] [-c cache] [-o options]",
-       .oneline        = "reopens an image with new options",
-       .help           = reopen_help,
-};
-
-static int reopen_f(BlockBackend *blk, int argc, char **argv)
-{
-    BlockDriverState *bs = blk_bs(blk);
-    QemuOpts *qopts;
-    QDict *opts;
-    int c;
-    int flags = bs->open_flags;
-    bool writethrough = !blk_enable_write_cache(blk);
-
-    BlockReopenQueue *brq;
-    Error *local_err = NULL;
-
-    while ((c = getopt(argc, argv, "c:o:r")) != -1) {
-        switch (c) {
-        case 'c':
-            if (bdrv_parse_cache_mode(optarg, &flags, &writethrough) < 0) {
-                error_report("Invalid cache option: %s", optarg);
-                return 0;
-            }
-            break;
-        case 'o':
-            if (!qemu_opts_parse_noisily(&reopen_opts, optarg, 0)) {
-                qemu_opts_reset(&reopen_opts);
-                return 0;
-            }
-            break;
-        case 'r':
-            flags &= ~BDRV_O_RDWR;
-            break;
-        default:
-            qemu_opts_reset(&reopen_opts);
-            return qemuio_command_usage(&reopen_cmd);
-        }
-    }
-
-    if (optind != argc) {
-        qemu_opts_reset(&reopen_opts);
-        return qemuio_command_usage(&reopen_cmd);
-    }
-
-    if (writethrough != blk_enable_write_cache(blk) &&
-        blk_get_attached_dev(blk))
-    {
-        error_report("Cannot change cache.writeback: Device attached");
-        qemu_opts_reset(&reopen_opts);
-        return 0;
-    }
-
-    qopts = qemu_opts_find(&reopen_opts, NULL);
-    opts = qopts ? qemu_opts_to_qdict(qopts, NULL) : NULL;
-    qemu_opts_reset(&reopen_opts);
-
-    brq = bdrv_reopen_queue(NULL, bs, opts, flags);
-    bdrv_reopen_multiple(brq, &local_err);
-    if (local_err) {
-        error_report_err(local_err);
-    } else {
-        blk_set_enable_write_cache(blk, !writethrough);
-    }
-
-    return 0;
-}
-
-static int break_f(BlockBackend *blk, int argc, char **argv)
-{
-    int ret;
-
-    ret = bdrv_debug_breakpoint(blk_bs(blk), argv[1], argv[2]);
-    if (ret < 0) {
-        printf("Could not set breakpoint: %s\n", strerror(-ret));
-    }
-
-    return 0;
-}
-
-static int remove_break_f(BlockBackend *blk, int argc, char **argv)
-{
-    int ret;
-
-    ret = bdrv_debug_remove_breakpoint(blk_bs(blk), argv[1]);
-    if (ret < 0) {
-        printf("Could not remove breakpoint %s: %s\n", argv[1], strerror(-ret));
-    }
-
-    return 0;
-}
-
-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",
-};
-
-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",
-};
-
-static int resume_f(BlockBackend *blk, int argc, char **argv)
-{
-    int ret;
-
-    ret = bdrv_debug_resume(blk_bs(blk), 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(BlockBackend *blk, int argc, char **argv)
-{
-    while (!bdrv_debug_is_suspended(blk_bs(blk), argv[1])) {
-        aio_poll(blk_get_aio_context(blk), true);
-    }
-
-    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(BlockBackend *blk, 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)",
-};
-
-static void sigraise_help(void)
-{
-    printf(
-"\n"
-" raises the given signal\n"
-"\n"
-" Example:\n"
-" 'sigraise %i' - raises SIGTERM\n"
-"\n"
-" Invokes raise(signal), where \"signal\" is the mandatory integer argument\n"
-" given to sigraise.\n"
-"\n", SIGTERM);
-}
-
-static int sigraise_f(BlockBackend *blk, int argc, char **argv);
-
-static const cmdinfo_t sigraise_cmd = {
-    .name       = "sigraise",
-    .cfunc      = sigraise_f,
-    .argmin     = 1,
-    .argmax     = 1,
-    .flags      = CMD_NOFILE_OK,
-    .args       = "signal",
-    .oneline    = "raises a signal",
-    .help       = sigraise_help,
-};
-
-static int sigraise_f(BlockBackend *blk, int argc, char **argv)
-{
-    int64_t sig = cvtnum(argv[1]);
-    if (sig < 0) {
-        print_cvtnum_err(sig, argv[1]);
-        return 0;
-    } else if (sig > NSIG) {
-        printf("signal argument '%s' is too large to be a valid signal\n",
-               argv[1]);
-        return 0;
-    }
-
-    /* Using raise() to kill this process does not necessarily flush all open
-     * streams. At least stdout and stderr (although the latter should be
-     * non-buffered anyway) should be flushed, though. */
-    fflush(stdout);
-    fflush(stderr);
-
-    raise(sig);
-    return 0;
-}
-
-static void sleep_cb(void *opaque)
-{
-    bool *expired = opaque;
-    *expired = true;
-}
-
-static int sleep_f(BlockBackend *blk, 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",
-};
-
-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(BlockBackend *blk, 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",
-};
-
-bool qemuio_command(BlockBackend *blk, const char *cmd)
-{
-    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) {
-            done = command(blk, ct, c, v);
-        } else {
-            fprintf(stderr, "command \"%s\" not found\n", v[0]);
-        }
-    }
-    g_free(input);
-    g_free(v);
-
-    return done;
-}
-
-static void __attribute((constructor)) init_qemuio_commands(void)
-{
-    /* initialize commands */
-    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(&reopen_cmd);
-    qemuio_add_command(&break_cmd);
-    qemuio_add_command(&remove_break_cmd);
-    qemuio_add_command(&resume_cmd);
-    qemuio_add_command(&wait_break_cmd);
-    qemuio_add_command(&abort_cmd);
-    qemuio_add_command(&sleep_cmd);
-    qemuio_add_command(&sigraise_cmd);
-}