Import upstream 1.6.0.upstream/1.6.0

Change-Id: Icf52b556470cac8677297f2ef14ded16684f7887
Signed-off-by: Junfeng Dong <junfeng.dong@intel.com>

1 files changed, 186 insertions, 1700 deletions

diff --git a/qemu-io.c b/qemu-io.c
index 92cdb2ab9..d54dc8692 100644
--- a/qemu-io.c
+++ b/qemu-io.c
@@ -14,1660 +14,26 @@
 #include <getopt.h>
 #include <libgen.h>
 
-#include "qemu-common.h"
-#include "main-loop.h"
-#include "block_int.h"
-#include "cmd.h"
+#include "qemu-io.h"
+#include "qemu/main-loop.h"
+#include "block/block_int.h"
 #include "trace/control.h"
 
-#define VERSION	"0.0.1"
-
 #define CMD_NOFILE_OK   0x01
 
 char *progname;
-static BlockDriverState *bs;
-
-static int misalign;
-
-/*
- * 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;
-}
+BlockDriverState *qemuio_bs;
+extern int qemuio_misalign;
 
-/*
- * 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(size_t len, int pattern)
-{
-    void *buf;
-
-    if (misalign) {
-        len += MISALIGN_OFFSET;
-    }
-    buf = qemu_blockalign(bs, len);
-    memset(buf, pattern, len);
-    if (misalign) {
-        buf += MISALIGN_OFFSET;
-    }
-    return buf;
-}
-
-static void qemu_io_free(void *p)
-{
-    if (misalign) {
-        p -= MISALIGN_OFFSET;
-    }
-    qemu_vfree(p);
-}
+/* qemu-io commands passed using -c */
+static int ncmdline;
+static char **cmdline;
 
-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(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(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(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(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(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(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 {
-    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(bs, data->offset / BDRV_SECTOR_SIZE,
-                                     data->count / BDRV_SECTOR_SIZE);
-    data->done = true;
-    if (data->ret < 0) {
-        *data->total = data->ret;
-        return;
-    }
-
-    *data->total = data->count;
-}
-
-static int do_co_write_zeroes(int64_t offset, int count, int *total)
-{
-    Coroutine *co;
-    CoWriteZeroes data = {
-        .offset = offset,
-        .count  = count,
-        .total  = total,
-        .done   = false,
-    };
-
-    co = qemu_coroutine_create(co_write_zeroes_entry);
-    qemu_coroutine_enter(co, &data);
-    while (!data.done) {
-        qemu_aio_wait();
-    }
-    if (data.ret < 0) {
-        return data.ret;
-    } else {
-        return 1;
-    }
-}
-
-static int do_load_vmstate(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(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(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(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(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(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(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:
-            return command_usage(&read_cmd);
-        }
-    }
-
-    if (optind != argc - 2) {
-        return command_usage(&read_cmd);
-    }
-
-    if (bflag && pflag) {
-        printf("-b and -p cannot be specified at the same time\n");
-        return 0;
-    }
-
-    offset = cvtnum(argv[optind]);
-    if (offset < 0) {
-        printf("non-numeric length argument -- %s\n", argv[optind]);
-        return 0;
-    }
-
-    optind++;
-    count = cvtnum(argv[optind]);
-    if (count < 0) {
-        printf("non-numeric length argument -- %s\n", argv[optind]);
-        return 0;
-    }
-
-    if (!Pflag && (lflag || sflag)) {
-        return command_usage(&read_cmd);
-    }
-
-    if (!lflag) {
-        pattern_count = count - pattern_offset;
-    }
-
-    if ((pattern_count < 0) || (pattern_count + pattern_offset > count))  {
-        printf("pattern 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(count, 0xab);
-
-    gettimeofday(&t1, NULL);
-    if (pflag) {
-        cnt = do_pread(buf, offset, count, &total);
-    } else if (bflag) {
-        cnt = do_load_vmstate(buf, offset, count, &total);
-    } else {
-        cnt = do_read(buf, offset, count, &total);
-    }
-    gettimeofday(&t2, NULL);
-
-    if (cnt < 0) {
-        printf("read failed: %s\n", strerror(-cnt));
-        goto out;
-    }
-
-    if (Pflag) {
-        void *cmp_buf = 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(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(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:
-            return command_usage(&readv_cmd);
-        }
-    }
-
-    if (optind > argc - 2) {
-        return command_usage(&readv_cmd);
-    }
-
-
-    offset = cvtnum(argv[optind]);
-    if (offset < 0) {
-        printf("non-numeric length argument -- %s\n", argv[optind]);
-        return 0;
-    }
-    optind++;
-
-    if (offset & 0x1ff) {
-        printf("offset %" PRId64 " is not sector aligned\n",
-               offset);
-        return 0;
-    }
-
-    nr_iov = argc - optind;
-    buf = create_iovec(&qiov, &argv[optind], nr_iov, 0xab);
-    if (buf == NULL) {
-        return 0;
-    }
-
-    gettimeofday(&t1, NULL);
-    cnt = do_aio_readv(&qiov, offset, &total);
-    gettimeofday(&t2, NULL);
-
-    if (cnt < 0) {
-        printf("readv failed: %s\n", strerror(-cnt));
-        goto out;
-    }
-
-    if (Pflag) {
-        void *cmp_buf = 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"
-" -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(int argc, char **argv);
-
-static const cmdinfo_t write_cmd = {
-    .name       = "write",
-    .altname    = "w",
-    .cfunc      = write_f,
-    .argmin     = 2,
-    .argmax     = -1,
-    .args       = "[-bCpqz] [-P pattern ] off len",
-    .oneline    = "writes a number of bytes at a specified offset",
-    .help       = write_help,
-};
-
-static int write_f(int argc, char **argv)
-{
-    struct timeval t1, t2;
-    int Cflag = 0, pflag = 0, qflag = 0, bflag = 0, Pflag = 0, zflag = 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, "bCpP:qz")) != EOF) {
-        switch (c) {
-        case 'b':
-            bflag = 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 command_usage(&write_cmd);
-        }
-    }
-
-    if (optind != argc - 2) {
-        return 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) {
-        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(count, pattern);
-    }
-
-    gettimeofday(&t1, NULL);
-    if (pflag) {
-        cnt = do_pwrite(buf, offset, count, &total);
-    } else if (bflag) {
-        cnt = do_save_vmstate(buf, offset, count, &total);
-    } else if (zflag) {
-        cnt = do_co_write_zeroes(offset, count, &total);
-    } else {
-        cnt = do_write(buf, offset, count, &total);
-    }
-    gettimeofday(&t2, NULL);
-
-    if (cnt < 0) {
-        printf("write failed: %s\n", strerror(-cnt));
-        goto out;
-    }
-
-    if (qflag) {
-        goto out;
-    }
-
-    /* Finally, report back -- -C gives a parsable format */
-    t2 = tsub(t2, t1);
-    print_report("wrote", &t2, offset, count, total, cnt, Cflag);
-
-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"
-" 'write 512 1k 1k' - writes 2 kilobytes at 512 bytes into the open file\n"
-"\n"
-" Writes into a segment of the currently open file, using a buffer\n"
-" filled with a set pattern (0xcdcdcdcd).\n"
-" -P, -- use different pattern to fill file\n"
-" -C, -- report statistics in a machine parsable format\n"
-" -q, -- quiet mode, do not show I/O statistics\n"
-"\n");
-}
-
-static int writev_f(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(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:
-            return command_usage(&writev_cmd);
-        }
-    }
-
-    if (optind > argc - 2) {
-        return command_usage(&writev_cmd);
-    }
-
-    offset = cvtnum(argv[optind]);
-    if (offset < 0) {
-        printf("non-numeric length argument -- %s\n", argv[optind]);
-        return 0;
-    }
-    optind++;
-
-    if (offset & 0x1ff) {
-        printf("offset %" PRId64 " is not sector aligned\n",
-               offset);
-        return 0;
-    }
-
-    nr_iov = argc - optind;
-    buf = create_iovec(&qiov, &argv[optind], nr_iov, pattern);
-    if (buf == NULL) {
-        return 0;
-    }
-
-    gettimeofday(&t1, NULL);
-    cnt = do_aio_writev(&qiov, offset, &total);
-    gettimeofday(&t2, NULL);
-
-    if (cnt < 0) {
-        printf("writev failed: %s\n", strerror(-cnt));
-        goto out;
-    }
-
-    if (qflag) {
-        goto out;
-    }
-
-    /* Finally, report back -- -C gives a parsable format */
-    t2 = tsub(t2, t1);
-    print_report("wrote", &t2, offset, qiov.size, total, cnt, Cflag);
-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(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(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:
-            return command_usage(&writev_cmd);
-        }
-    }
-
-    if (optind > argc - 2) {
-        return command_usage(&writev_cmd);
-    }
-
-    nr_reqs = 1;
-    for (i = optind; i < argc; i++) {
-        if (!strcmp(argv[i], ";")) {
-            nr_reqs++;
-        }
-    }
-
-    reqs = g_malloc0(nr_reqs * sizeof(*reqs));
-    buf = g_malloc0(nr_reqs * sizeof(*buf));
-    qiovs = g_malloc(nr_reqs * sizeof(*qiovs));
-
-    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(&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(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(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(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);
-            return command_usage(&aio_read_cmd);
-        }
-    }
-
-    if (optind > argc - 2) {
-        g_free(ctx);
-        return command_usage(&aio_read_cmd);
-    }
-
-    ctx->offset = cvtnum(argv[optind]);
-    if (ctx->offset < 0) {
-        printf("non-numeric length argument -- %s\n", argv[optind]);
-        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(&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(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(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);
-            return command_usage(&aio_write_cmd);
-        }
-    }
-
-    if (optind > argc - 2) {
-        g_free(ctx);
-        return command_usage(&aio_write_cmd);
-    }
-
-    ctx->offset = cvtnum(argv[optind]);
-    if (ctx->offset < 0) {
-        printf("non-numeric length argument -- %s\n", argv[optind]);
-        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(&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(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(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(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(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(int argc, char **argv)
-{
-    BlockDriverInfo bdi;
-    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);
-
-    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(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(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:
-            return command_usage(&discard_cmd);
-        }
-    }
-
-    if (optind != argc - 2) {
-        return command_usage(&discard_cmd);
-    }
-
-    offset = cvtnum(argv[optind]);
-    if (offset < 0) {
-        printf("non-numeric length argument -- %s\n", argv[optind]);
-        return 0;
-    }
-
-    optind++;
-    count = cvtnum(argv[optind]);
-    if (count < 0) {
-        printf("non-numeric length argument -- %s\n", argv[optind]);
-        return 0;
-    }
-
-    gettimeofday(&t1, NULL);
-    ret = bdrv_discard(bs, offset >> BDRV_SECTOR_BITS,
-                       count >> BDRV_SECTOR_BITS);
-    gettimeofday(&t2, NULL);
-
-    if (ret < 0) {
-        printf("discard failed: %s\n", strerror(-ret));
-        goto out;
-    }
-
-    /* Finally, report back -- -C gives a parsable format */
-    if (!qflag) {
-        t2 = tsub(t2, t1);
-        print_report("discard", &t2, offset, count, count, 1, Cflag);
-    }
-
-out:
-    return 0;
-}
-
-static int alloc_f(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 & 0x1ff) {
-        printf("offset %" PRId64 " is not sector aligned\n",
-               offset);
-        return 0;
-    }
-
-    if (argc == 3) {
-        nb_sectors = cvtnum(argv[2]);
-    } else {
-        nb_sectors = 1;
-    }
-
-    remaining = nb_sectors;
-    sum_alloc = 0;
-    sector_num = offset >> 9;
-    while (remaining) {
-        ret = bdrv_is_allocated(bs, sector_num, remaining, &num);
-        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_f(int argc, char **argv)
-{
-    int64_t offset;
-    int64_t nb_sectors;
-    char s1[64];
-    int num, num_checked;
-    int ret;
-    const char *retstr;
-
-    offset = 0;
-    nb_sectors = bs->total_sectors;
-
-    do {
-        num_checked = MIN(nb_sectors, INT_MAX);
-        ret = bdrv_is_allocated(bs, offset, num_checked, &num);
-        retstr = ret ? "    allocated" : "not allocated";
-        cvtstr(offset << 9ULL, s1, sizeof(s1));
-        printf("[% 24" PRId64 "] % 8d/% 8d sectors %s at offset %s (%d)\n",
-               offset << 9ULL, num, num_checked, retstr, s1, ret);
-
-        offset += num;
-        nb_sectors -= num;
-    } while (offset < bs->total_sectors);
-
-    return 0;
-}
-
-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 abort_f(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 int close_f(int argc, char **argv)
+static int close_f(BlockDriverState *bs, int argc, char **argv)
 {
     bdrv_delete(bs);
-    bs = NULL;
+    qemuio_bs = NULL;
     return 0;
 }
 
@@ -1680,23 +46,23 @@ static const cmdinfo_t close_cmd = {
 
 static int openfile(char *name, int flags, int growable)
 {
-    if (bs) {
+    if (qemuio_bs) {
         fprintf(stderr, "file open already, try 'help close'\n");
         return 1;
     }
 
     if (growable) {
-        if (bdrv_file_open(&bs, name, flags)) {
+        if (bdrv_file_open(&qemuio_bs, name, NULL, flags)) {
             fprintf(stderr, "%s: can't open device %s\n", progname, name);
             return 1;
         }
     } else {
-        bs = bdrv_new("hda");
+        qemuio_bs = bdrv_new("hda");
 
-        if (bdrv_open(bs, name, flags, NULL) < 0) {
+        if (bdrv_open(qemuio_bs, name, NULL, flags, NULL) < 0) {
             fprintf(stderr, "%s: can't open device %s\n", progname, name);
-            bdrv_delete(bs);
-            bs = NULL;
+            bdrv_delete(qemuio_bs);
+            qemuio_bs = NULL;
             return 1;
         }
     }
@@ -1721,7 +87,7 @@ static void open_help(void)
 "\n");
 }
 
-static int open_f(int argc, char **argv);
+static int open_f(BlockDriverState *bs, int argc, char **argv);
 
 static const cmdinfo_t open_cmd = {
     .name       = "open",
@@ -1735,7 +101,7 @@ static const cmdinfo_t open_cmd = {
     .help       = open_help,
 };
 
-static int open_f(int argc, char **argv)
+static int open_f(BlockDriverState *bs, int argc, char **argv)
 {
     int flags = 0;
     int readonly = 0;
@@ -1757,7 +123,7 @@ static int open_f(int argc, char **argv)
             growable = 1;
             break;
         default:
-            return command_usage(&open_cmd);
+            return qemuio_command_usage(&open_cmd);
         }
     }
 
@@ -1766,33 +132,27 @@ static int open_f(int argc, char **argv)
     }
 
     if (optind != argc - 1) {
-        return command_usage(&open_cmd);
+        return qemuio_command_usage(&open_cmd);
     }
 
     return openfile(argv[optind], flags, growable);
 }
 
-static int init_args_command(int index)
-{
-    /* only one device allowed so far */
-    if (index >= 1) {
-        return 0;
-    }
-    return ++index;
-}
-
-static int init_check_command(const cmdinfo_t *ct)
+static int quit_f(BlockDriverState *bs, int argc, char **argv)
 {
-    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;
 }
 
+static const cmdinfo_t quit_cmd = {
+    .name       = "quit",
+    .altname    = "q",
+    .cfunc      = quit_f,
+    .argmin     = -1,
+    .argmax     = -1,
+    .flags      = CMD_FLAG_GLOBAL,
+    .oneline    = "exit the program",
+};
+
 static void usage(const char *name)
 {
     printf(
@@ -1815,11 +175,146 @@ static void usage(const char *name)
 }
 
 
+#if defined(ENABLE_READLINE)
+# include <readline/history.h>
+# include <readline/readline.h>
+#elif defined(ENABLE_EDITLINE)
+# include <histedit.h>
+#endif
+
+static char *get_prompt(void)
+{
+    static char prompt[FILENAME_MAX + 2 /*"> "*/ + 1 /*"\0"*/ ];
+
+    if (!prompt[0]) {
+        snprintf(prompt, sizeof(prompt), "%s> ", progname);
+    }
+
+    return prompt;
+}
+
+#if defined(ENABLE_READLINE)
+static char *fetchline(void)
+{
+    char *line = readline(get_prompt());
+    if (line && *line) {
+        add_history(line);
+    }
+    return line;
+}
+#elif defined(ENABLE_EDITLINE)
+static char *el_get_prompt(EditLine *e)
+{
+    return get_prompt();
+}
+
+static char *fetchline(void)
+{
+    static EditLine *el;
+    static History *hist;
+    HistEvent hevent;
+    char *line;
+    int count;
+
+    if (!el) {
+        hist = history_init();
+        history(hist, &hevent, H_SETSIZE, 100);
+        el = el_init(progname, stdin, stdout, stderr);
+        el_source(el, NULL);
+        el_set(el, EL_SIGNAL, 1);
+        el_set(el, EL_PROMPT, el_get_prompt);
+        el_set(el, EL_HIST, history, (const char *)hist);
+    }
+    line = strdup(el_gets(el, &count));
+    if (line) {
+        if (count > 0) {
+            line[count-1] = '\0';
+        }
+        if (*line) {
+            history(hist, &hevent, H_ENTER, line);
+        }
+    }
+    return line;
+}
+#else
+# define MAXREADLINESZ 1024
+static char *fetchline(void)
+{
+    char *p, *line = g_malloc(MAXREADLINESZ);
+
+    if (!fgets(line, MAXREADLINESZ, stdin)) {
+        g_free(line);
+        return NULL;
+    }
+
+    p = line + strlen(line);
+    if (p != line && p[-1] == '\n') {
+        p[-1] = '\0';
+    }
+
+    return line;
+}
+#endif
+
+static void prep_fetchline(void *opaque)
+{
+    int *fetchable = opaque;
+
+    qemu_set_fd_handler(STDIN_FILENO, NULL, NULL, NULL);
+    *fetchable= 1;
+}
+
+static void command_loop(void)
+{
+    int i, done = 0, fetchable = 0, prompted = 0;
+    char *input;
+
+    for (i = 0; !done && i < ncmdline; i++) {
+        done = qemuio_command(qemuio_bs, cmdline[i]);
+    }
+    if (cmdline) {
+        g_free(cmdline);
+        return;
+    }
+
+    while (!done) {
+        if (!prompted) {
+            printf("%s", get_prompt());
+            fflush(stdout);
+            qemu_set_fd_handler(STDIN_FILENO, prep_fetchline, NULL, &fetchable);
+            prompted = 1;
+        }
+
+        main_loop_wait(false);
+
+        if (!fetchable) {
+            continue;
+        }
+
+        input = fetchline();
+        if (input == NULL) {
+            break;
+        }
+        done = qemuio_command(qemuio_bs, input);
+        g_free(input);
+
+        prompted = 0;
+        fetchable = 0;
+    }
+    qemu_set_fd_handler(STDIN_FILENO, NULL, NULL, NULL);
+}
+
+static void add_user_command(char *optarg)
+{
+    cmdline = g_realloc(cmdline, ++ncmdline * sizeof(char *));
+    cmdline[ncmdline-1] = optarg;
+}
+
 int main(int argc, char **argv)
 {
     int readonly = 0;
     int growable = 0;
-    const char *sopt = "hVc:rsnmgkt:T:";
+    const char *sopt = "hVc:d:rsnmgkt:T:";
     const struct option lopt[] = {
         { "help", 0, NULL, 'h' },
         { "version", 0, NULL, 'V' },
@@ -1831,13 +326,18 @@ int main(int argc, char **argv)
         { "misalign", 0, NULL, 'm' },
         { "growable", 0, NULL, 'g' },
         { "native-aio", 0, NULL, 'k' },
+        { "discard", 1, NULL, 'd' },
         { "cache", 1, NULL, 't' },
         { "trace", 1, NULL, 'T' },
         { NULL, 0, NULL, 0 }
     };
     int c;
     int opt_index = 0;
-    int flags = 0;
+    int flags = BDRV_O_UNMAP;
+
+#ifdef CONFIG_POSIX
+    signal(SIGPIPE, SIG_IGN);
+#endif
 
     progname = basename(argv[0]);
 
@@ -1849,6 +349,12 @@ int main(int argc, char **argv)
         case 'n':
             flags |= BDRV_O_NOCACHE | BDRV_O_CACHE_WB;
             break;
+        case 'd':
+            if (bdrv_parse_discard_flags(optarg, &flags) < 0) {
+                error_report("Invalid discard option: %s", optarg);
+                exit(1);
+            }
+            break;
         case 'c':
             add_user_command(optarg);
             break;
@@ -1856,7 +362,7 @@ int main(int argc, char **argv)
             readonly = 1;
             break;
         case 'm':
-            misalign = 1;
+            qemuio_misalign = 1;
             break;
         case 'g':
             growable = 1;
@@ -1876,7 +382,7 @@ int main(int argc, char **argv)
             }
             break;
         case 'V':
-            printf("%s version %s\n", progname, VERSION);
+            printf("%s version %s\n", progname, QEMU_VERSION);
             exit(0);
         case 'h':
             usage(progname);
@@ -1896,29 +402,9 @@ int main(int argc, char **argv)
     bdrv_init();
 
     /* initialize commands */
-    quit_init();
-    help_init();
-    add_command(&open_cmd);
-    add_command(&close_cmd);
-    add_command(&read_cmd);
-    add_command(&readv_cmd);
-    add_command(&write_cmd);
-    add_command(&writev_cmd);
-    add_command(&multiwrite_cmd);
-    add_command(&aio_read_cmd);
-    add_command(&aio_write_cmd);
-    add_command(&aio_flush_cmd);
-    add_command(&flush_cmd);
-    add_command(&truncate_cmd);
-    add_command(&length_cmd);
-    add_command(&info_cmd);
-    add_command(&discard_cmd);
-    add_command(&alloc_cmd);
-    add_command(&map_cmd);
-    add_command(&abort_cmd);
-
-    add_args_command(init_args_command);
-    add_check_command(init_check_command);
+    qemuio_add_command(&quit_cmd);
+    qemuio_add_command(&open_cmd);
+    qemuio_add_command(&close_cmd);
 
     /* open the device */
     if (!readonly) {
@@ -1935,8 +421,8 @@ int main(int argc, char **argv)
      */
     bdrv_drain_all();
 
-    if (bs) {
-        bdrv_delete(bs);
+    if (qemuio_bs) {
+        bdrv_delete(qemuio_bs);
     }
     return 0;
 }