diff options
Diffstat (limited to 'qemu-io.c')
| -rw-r--r-- | qemu-io.c | 1074 |
1 files changed, 1074 insertions, 0 deletions
diff --git a/qemu-io.c b/qemu-io.c new file mode 100644 index 0000000..466d22c --- /dev/null +++ b/qemu-io.c @@ -0,0 +1,1074 @@ +/* + * 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 <sys/types.h> +#include <stdarg.h> +#include <stdio.h> +#include <getopt.h> + +#include "qemu-common.h" +#include "block_int.h" +#include "cmd.h" + +#define VERSION "0.0.1" + +#define CMD_NOFILE_OK 0x01 + +char *progname; +static BlockDriverState *bs; + +static int 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_memalign(512, 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); +} + +static void +dump_buffer(char *buffer, int64_t offset, int len) +{ + int i, j; + char *p; + + for (i = 0, p = buffer; i < len; i += 16) { + char *s = p; + + printf("%08llx: ", (unsigned long long)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((int)*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 %lld\n", + op, total, count, (long long)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)); + } +} + +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; +} + +#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) +{ + BlockDriverAIOCB *acb; + int async_ret = NOT_DONE; + + acb = bdrv_aio_readv(bs, offset >> 9, qiov, qiov->size >> 9, + aio_rw_done, &async_ret); + if (!acb) + return -EIO; + + while (async_ret == NOT_DONE) + qemu_aio_wait(); + + *total = qiov->size; + return async_ret < 0 ? async_ret : 1; +} + +static int do_aio_writev(QEMUIOVector *qiov, int64_t offset, int *total) +{ + BlockDriverAIOCB *acb; + int async_ret = NOT_DONE; + + acb = bdrv_aio_writev(bs, offset >> 9, qiov, qiov->size >> 9, + aio_rw_done, &async_ret); + if (!acb) + return -EIO; + + while (async_ret == NOT_DONE) + qemu_aio_wait(); + + *total = qiov->size >> 9; + return async_ret < 0 ? async_ret : 1; +} + + +static const cmdinfo_t read_cmd; + +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" +" -p, -- use bdrv_pread to read the file\n" +" -C, -- report statistics in a machine parsable format\n" +" -v, -- dump buffer to standard output\n" +" -q, -- quite mode, do not show I/O statistics\n" +"\n"); +} + +static int +read_f(int argc, char **argv) +{ + struct timeval t1, t2; + int Cflag = 0, pflag = 0, qflag = 0, vflag = 0; + int c, cnt; + char *buf; + int64_t offset; + int count, total; + + while ((c = getopt(argc, argv, "Cpqv")) != EOF) { + switch (c) { + case 'C': + Cflag = 1; + break; + case 'p': + pflag = 1; + break; + case 'q': + qflag = 1; + break; + case 'v': + vflag = 1; + break; + default: + return command_usage(&read_cmd); + } + } + + if (optind != argc - 2) + return command_usage(&read_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; + } + + if (!pflag) + if (offset & 0x1ff) { + printf("offset %lld is not sector aligned\n", + (long long)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 + cnt = do_read(buf, offset, count, &total); + gettimeofday(&t2, NULL); + + if (cnt < 0) { + printf("read failed: %s\n", strerror(-cnt)); + return 0; + } + + if (qflag) + return 0; + + 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); + + qemu_io_free(buf); + + return 0; +} + +static const cmdinfo_t read_cmd = { + .name = "read", + .altname = "r", + .cfunc = read_f, + .argmin = 2, + .argmax = -1, + .args = "[-aCpqv] off len", + .oneline = "reads a number of bytes at a specified offset", + .help = read_help, +}; + +static const cmdinfo_t readv_cmd; + +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" +" -v, -- dump buffer to standard output\n" +" -q, -- quite mode, do not show I/O statistics\n" +"\n"); +} + +static int +readv_f(int argc, char **argv) +{ + struct timeval t1, t2; + int Cflag = 0, qflag = 0, vflag = 0; + int c, cnt; + char *buf, *p; + int64_t offset; + int count = 0, total; + int nr_iov, i; + QEMUIOVector qiov; + + while ((c = getopt(argc, argv, "Cqv")) != EOF) { + switch (c) { + case 'C': + Cflag = 1; + 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 %lld is not sector aligned\n", + (long long)offset); + return 0; + } + + if (count & 0x1ff) { + printf("count %d is not sector aligned\n", + count); + return 0; + } + + for (i = optind; i < argc; i++) { + size_t len; + + len = cvtnum(argv[i]); + if (len < 0) { + printf("non-numeric length argument -- %s\n", argv[i]); + return 0; + } + count += len; + } + + nr_iov = argc - optind; + qemu_iovec_init(&qiov, nr_iov); + buf = p = qemu_io_alloc(count, 0xab); + for (i = 0; i < nr_iov; i++) { + size_t len; + + len = cvtnum(argv[optind]); + if (len < 0) { + printf("non-numeric length argument -- %s\n", + argv[optind]); + return 0; + } + + qemu_iovec_add(&qiov, p, len); + p += len; + optind++; + } + + gettimeofday(&t1, NULL); + cnt = do_aio_readv(&qiov, offset, &total); + gettimeofday(&t2, NULL); + + if (cnt < 0) { + printf("readv failed: %s\n", strerror(-cnt)); + return 0; + } + + if (qflag) + return 0; + + 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); + + qemu_io_free(buf); + + return 0; +} + +static const cmdinfo_t readv_cmd = { + .name = "readv", + .cfunc = readv_f, + .argmin = 2, + .argmax = -1, + .args = "[-Cqv] off len [len..]", + .oneline = "reads a number of bytes at a specified offset", + .help = readv_help, +}; + +static const cmdinfo_t write_cmd; + +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" +" -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, -- quite mode, do not show I/O statistics\n" +"\n"); +} + +static int +write_f(int argc, char **argv) +{ + struct timeval t1, t2; + int Cflag = 0, pflag = 0, qflag = 0; + int c, cnt; + char *buf; + int64_t offset; + int count, total; + int pattern = 0xcd; + + while ((c = getopt(argc, argv, "CpP:q")) != EOF) { + switch (c) { + case 'C': + Cflag = 1; + break; + case 'p': + pflag = 1; + break; + case 'P': + pattern = atoi(optarg); + break; + case 'q': + qflag = 1; + break; + default: + return command_usage(&write_cmd); + } + } + + if (optind != argc - 2) + return command_usage(&write_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; + } + + if (!pflag) { + if (offset & 0x1ff) { + printf("offset %lld is not sector aligned\n", + (long long)offset); + return 0; + } + + if (count & 0x1ff) { + printf("count %d is not sector aligned\n", + count); + return 0; + } + } + + buf = qemu_io_alloc(count, pattern); + + gettimeofday(&t1, NULL); + if (pflag) + cnt = do_pwrite(buf, offset, count, &total); + else + cnt = do_write(buf, offset, count, &total); + gettimeofday(&t2, NULL); + + if (cnt < 0) { + printf("write failed: %s\n", strerror(-cnt)); + return 0; + } + + if (qflag) + return 0; + + /* Finally, report back -- -C gives a parsable format */ + t2 = tsub(t2, t1); + print_report("wrote", &t2, offset, count, total, cnt, Cflag); + + qemu_io_free(buf); + + return 0; +} + +static const cmdinfo_t write_cmd = { + .name = "write", + .altname = "w", + .cfunc = write_f, + .argmin = 2, + .argmax = -1, + .args = "[-aCpq] [-P pattern ] off len", + .oneline = "writes a number of bytes at a specified offset", + .help = write_help, +}; + +static const cmdinfo_t writev_cmd; + +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, -- quite mode, do not show I/O statistics\n" +"\n"); +} + +static int +writev_f(int argc, char **argv) +{ + struct timeval t1, t2; + int Cflag = 0, qflag = 0; + int c, cnt; + char *buf, *p; + int64_t offset; + int count = 0, total; + int nr_iov, i; + 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 = atoi(optarg); + 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 %lld is not sector aligned\n", + (long long)offset); + return 0; + } + + if (count & 0x1ff) { + printf("count %d is not sector aligned\n", + count); + return 0; + } + + + for (i = optind; i < argc; i++) { + size_t len; + + len = cvtnum(argv[optind]); + if (len < 0) { + printf("non-numeric length argument -- %s\n", argv[i]); + return 0; + } + count += len; + } + + nr_iov = argc - optind; + qemu_iovec_init(&qiov, nr_iov); + buf = p = qemu_io_alloc(count, 0xab); + for (i = 0; i < nr_iov; i++) { + size_t len; + + len = cvtnum(argv[optind]); + if (len < 0) { + printf("non-numeric length argument -- %s\n", + argv[optind]); + return 0; + } + + qemu_iovec_add(&qiov, p, len); + p += len; + optind++; + } + + gettimeofday(&t1, NULL); + cnt = do_aio_writev(&qiov, offset, &total); + gettimeofday(&t2, NULL); + + if (cnt < 0) { + printf("writev failed: %s\n", strerror(-cnt)); + return 0; + } + + if (qflag) + return 0; + + /* Finally, report back -- -C gives a parsable format */ + t2 = tsub(t2, t1); + print_report("wrote", &t2, offset, qiov.size, total, cnt, Cflag); + + qemu_io_free(buf); + + return 0; +} + +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 +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", 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", 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 int +alloc_f(int argc, char **argv) +{ + int64_t offset; + int nb_sectors; + char s1[64]; + int num; + int ret; + + offset = cvtnum(argv[1]); + if (offset & 0x1ff) { + printf("offset %lld is not sector aligned\n", + (long long)offset); + return 0; + } + + if (argc == 3) + nb_sectors = cvtnum(argv[2]); + else + nb_sectors = 1; + + ret = bdrv_is_allocated(bs, offset >> 9, nb_sectors, &num); + if (ret) { + printf("is_allocated: %s", strerror(ret)); + return 0; + } + + cvtstr(offset, s1, sizeof(s1)); + + if (nb_sectors == 1) + printf("sector allocated at offset %s\n", s1); + else + printf("%d/%d sectors allocated at offset %s\n", + num, 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 +close_f(int argc, char **argv) +{ + bdrv_close(bs); + bs = NULL; + return 0; +} + +static const cmdinfo_t close_cmd = { + .name = "close", + .altname = "c", + .cfunc = close_f, + .oneline = "close the current open file", +}; + +static int openfile(char *name, int flags) +{ + if (bs) { + fprintf(stderr, "file open already, try 'help close'\n"); + return 1; + } + + bs = bdrv_new("hda"); + if (!bs) + return 1; + + if (bdrv_open(bs, name, flags) == -1) { + fprintf(stderr, "%s: can't open device %s\n", progname, name); + bs = NULL; + return 1; + } + + return 0; +} + +static void +open_help(void) +{ + printf( +"\n" +" opens a new file in the requested mode\n" +"\n" +" Example:\n" +" 'open -Cn /tmp/data' - creates/opens data file read-write and uncached\n" +"\n" +" Opens a file for subsequent use by all of the other qemu-io commands.\n" +" -C, -- create new file if it doesn't exist\n" +" -r, -- open file read-only\n" +" -s, -- use snapshot file\n" +" -n, -- disable host cache\n" +"\n"); +} + +static const cmdinfo_t open_cmd; + +static int +open_f(int argc, char **argv) +{ + int flags = 0; + int readonly = 0; + int c; + + while ((c = getopt(argc, argv, "snCr")) != EOF) { + switch (c) { + case 's': + flags |= BDRV_O_SNAPSHOT; + break; + case 'n': + flags |= BDRV_O_NOCACHE; + break; + case 'C': + flags |= BDRV_O_CREAT; + break; + case 'r': + readonly = 1; + break; + default: + return command_usage(&open_cmd); + } + } + + if (readonly) + flags |= BDRV_O_RDONLY; + else + flags |= BDRV_O_RDWR; + + if (optind != argc - 1) + return command_usage(&open_cmd); + + return openfile(argv[optind], flags); +} + +static const cmdinfo_t open_cmd = { + .name = "open", + .altname = "o", + .cfunc = open_f, + .argmin = 1, + .argmax = -1, + .flags = CMD_NOFILE_OK, + .args = "[-Crsn] [path]", + .oneline = "open the file specified by path", + .help = open_help, +}; + +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) +{ + 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 void usage(const char *name) +{ + printf( +"Usage: %s [-h] [-V] [-Crsnm] [-c cmd] ... [file]\n" +"QEMU Disk excerciser\n" +"\n" +" -C, --create create new file if it doesn't exist\n" +" -c, --cmd command to execute\n" +" -r, --read-only export read-only\n" +" -s, --snapshot use snapshot file\n" +" -n, --nocache disable host cache\n" +" -m, --misalign misalign allocations for O_DIRECT\n" +" -h, --help display this help and exit\n" +" -V, --version output version information and exit\n" +"\n", + name); +} + + +int main(int argc, char **argv) +{ + int readonly = 0; + const char *sopt = "hVc:Crsnm"; + struct option lopt[] = { + { "help", 0, 0, 'h' }, + { "version", 0, 0, 'V' }, + { "offset", 1, 0, 'o' }, + { "cmd", 1, 0, 'c' }, + { "create", 0, 0, 'C' }, + { "read-only", 0, 0, 'r' }, + { "snapshot", 0, 0, 's' }, + { "nocache", 0, 0, 'n' }, + { "misalign", 0, 0, 'm' }, + { NULL, 0, 0, 0 } + }; + int c; + int opt_index = 0; + int flags = 0; + + progname = basename(argv[0]); + + while ((c = getopt_long(argc, argv, sopt, lopt, &opt_index)) != -1) { + switch (c) { + case 's': + flags |= BDRV_O_SNAPSHOT; + break; + case 'n': + flags |= BDRV_O_NOCACHE; + break; + case 'c': + add_user_command(optarg); + break; + case 'C': + flags |= BDRV_O_CREAT; + break; + case 'r': + readonly = 1; + break; + case 'm': + misalign = 1; + break; + case 'V': + printf("%s version %s\n", progname, VERSION); + exit(0); + case 'h': + usage(progname); + exit(0); + default: + usage(progname); + exit(1); + } + } + + if ((argc - optind) > 1) { + usage(progname); + exit(1); + } + + 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(&flush_cmd); + add_command(&truncate_cmd); + add_command(&length_cmd); + add_command(&info_cmd); + add_command(&alloc_cmd); + + add_args_command(init_args_command); + add_check_command(init_check_command); + + /* open the device */ + if (readonly) + flags |= BDRV_O_RDONLY; + else + flags |= BDRV_O_RDWR; + + if ((argc - optind) == 1) + openfile(argv[optind], flags); + command_loop(); + + if (bs) + bdrv_close(bs); + return 0; +} |