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Diffstat (limited to 'qemu-io.c')
-rw-r--r--qemu-io.c1074
1 files changed, 1074 insertions, 0 deletions
diff --git a/qemu-io.c b/qemu-io.c
new file mode 100644
index 000000000..466d22cb3
--- /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;
+}