697 lines
18 KiB
C
697 lines
18 KiB
C
/*
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* Command line utility to exercise the QEMU I/O path.
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*
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* Copyright (C) 2009 Red Hat, Inc.
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* Copyright (c) 2003-2005 Silicon Graphics, Inc.
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*/
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#include "qemu/osdep.h"
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#include <getopt.h>
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#include <libgen.h>
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#ifndef _WIN32
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#include <termios.h>
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#endif
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#include "qemu-common.h"
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#include "qapi/error.h"
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#include "qemu-io.h"
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#include "qemu/error-report.h"
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#include "qemu/main-loop.h"
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#include "qemu/module.h"
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#include "qemu/option.h"
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#include "qemu/config-file.h"
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#include "qemu/readline.h"
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#include "qemu/log.h"
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#include "qemu/sockets.h"
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#include "qapi/qmp/qstring.h"
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#include "qapi/qmp/qdict.h"
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#include "qom/object_interfaces.h"
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#include "sysemu/block-backend.h"
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#include "block/block_int.h"
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#include "trace/control.h"
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#include "crypto/init.h"
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#include "qemu-version.h"
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#define CMD_NOFILE_OK 0x01
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static BlockBackend *qemuio_blk;
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static bool quit_qemu_io;
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/* qemu-io commands passed using -c */
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static int ncmdline;
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static char **cmdline;
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static bool imageOpts;
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static ReadLineState *readline_state;
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static int ttyEOF;
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static int get_eof_char(void)
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{
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#ifdef _WIN32
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return 0x4; /* Ctrl-D */
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#else
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struct termios tty;
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if (tcgetattr(STDIN_FILENO, &tty) != 0) {
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if (errno == ENOTTY) {
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return 0x0; /* just expect read() == 0 */
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} else {
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return 0x4; /* Ctrl-D */
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}
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}
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return tty.c_cc[VEOF];
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#endif
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}
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static int close_f(BlockBackend *blk, int argc, char **argv)
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{
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blk_unref(qemuio_blk);
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qemuio_blk = NULL;
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return 0;
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}
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static const cmdinfo_t close_cmd = {
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.name = "close",
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.altname = "c",
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.cfunc = close_f,
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.oneline = "close the current open file",
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};
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static int openfile(char *name, int flags, bool writethrough, bool force_share,
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QDict *opts)
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{
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Error *local_err = NULL;
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if (qemuio_blk) {
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error_report("file open already, try 'help close'");
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qobject_unref(opts);
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return 1;
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}
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if (force_share) {
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if (!opts) {
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opts = qdict_new();
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}
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if (qdict_haskey(opts, BDRV_OPT_FORCE_SHARE)
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&& strcmp(qdict_get_str(opts, BDRV_OPT_FORCE_SHARE), "on")) {
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error_report("-U conflicts with image options");
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qobject_unref(opts);
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return 1;
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}
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qdict_put_str(opts, BDRV_OPT_FORCE_SHARE, "on");
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}
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qemuio_blk = blk_new_open(name, NULL, opts, flags, &local_err);
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if (!qemuio_blk) {
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error_reportf_err(local_err, "can't open%s%s: ",
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name ? " device " : "", name ?: "");
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return 1;
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}
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blk_set_enable_write_cache(qemuio_blk, !writethrough);
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return 0;
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}
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static void open_help(void)
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{
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printf(
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"\n"
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" opens a new file in the requested mode\n"
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"\n"
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" Example:\n"
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" 'open -n -o driver=raw /tmp/data' - opens raw data file read-write, uncached\n"
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"\n"
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" Opens a file for subsequent use by all of the other qemu-io commands.\n"
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" -r, -- open file read-only\n"
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" -s, -- use snapshot file\n"
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" -C, -- use copy-on-read\n"
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" -n, -- disable host cache, short for -t none\n"
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" -U, -- force shared permissions\n"
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" -k, -- use kernel AIO implementation (Linux only, prefer use of -i)\n"
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" -i, -- use AIO mode (threads, native or io_uring)\n"
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" -t, -- use the given cache mode for the image\n"
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" -d, -- use the given discard mode for the image\n"
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" -o, -- options to be given to the block driver"
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"\n");
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}
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static int open_f(BlockBackend *blk, int argc, char **argv);
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static const cmdinfo_t open_cmd = {
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.name = "open",
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.altname = "o",
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.cfunc = open_f,
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.argmin = 1,
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.argmax = -1,
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.flags = CMD_NOFILE_OK,
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.args = "[-rsCnkU] [-t cache] [-d discard] [-o options] [path]",
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.oneline = "open the file specified by path",
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.help = open_help,
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};
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static QemuOptsList empty_opts = {
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.name = "drive",
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.merge_lists = true,
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.head = QTAILQ_HEAD_INITIALIZER(empty_opts.head),
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.desc = {
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/* no elements => accept any params */
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{ /* end of list */ }
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},
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};
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static int open_f(BlockBackend *blk, int argc, char **argv)
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{
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int flags = BDRV_O_UNMAP;
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int readonly = 0;
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bool writethrough = true;
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int c;
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int ret;
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QemuOpts *qopts;
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QDict *opts;
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bool force_share = false;
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while ((c = getopt(argc, argv, "snCro:ki:t:d:U")) != -1) {
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switch (c) {
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case 's':
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flags |= BDRV_O_SNAPSHOT;
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break;
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case 'n':
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flags |= BDRV_O_NOCACHE;
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writethrough = false;
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break;
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case 'C':
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flags |= BDRV_O_COPY_ON_READ;
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break;
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case 'r':
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readonly = 1;
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break;
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case 'k':
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flags |= BDRV_O_NATIVE_AIO;
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break;
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case 't':
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if (bdrv_parse_cache_mode(optarg, &flags, &writethrough) < 0) {
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error_report("Invalid cache option: %s", optarg);
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qemu_opts_reset(&empty_opts);
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return -EINVAL;
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}
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break;
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case 'd':
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if (bdrv_parse_discard_flags(optarg, &flags) < 0) {
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error_report("Invalid discard option: %s", optarg);
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qemu_opts_reset(&empty_opts);
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return -EINVAL;
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}
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break;
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case 'i':
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if (bdrv_parse_aio(optarg, &flags) < 0) {
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error_report("Invalid aio option: %s", optarg);
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qemu_opts_reset(&empty_opts);
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return -EINVAL;
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}
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break;
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case 'o':
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if (imageOpts) {
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printf("--image-opts and 'open -o' are mutually exclusive\n");
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qemu_opts_reset(&empty_opts);
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return -EINVAL;
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}
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if (!qemu_opts_parse_noisily(&empty_opts, optarg, false)) {
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qemu_opts_reset(&empty_opts);
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return -EINVAL;
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}
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break;
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case 'U':
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force_share = true;
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break;
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default:
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qemu_opts_reset(&empty_opts);
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qemuio_command_usage(&open_cmd);
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return -EINVAL;
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}
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}
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if (!readonly) {
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flags |= BDRV_O_RDWR;
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}
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if (imageOpts && (optind == argc - 1)) {
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if (!qemu_opts_parse_noisily(&empty_opts, argv[optind], false)) {
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qemu_opts_reset(&empty_opts);
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return -EINVAL;
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}
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optind++;
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}
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qopts = qemu_opts_find(&empty_opts, NULL);
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opts = qopts ? qemu_opts_to_qdict(qopts, NULL) : NULL;
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qemu_opts_reset(&empty_opts);
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if (optind == argc - 1) {
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ret = openfile(argv[optind], flags, writethrough, force_share, opts);
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} else if (optind == argc) {
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ret = openfile(NULL, flags, writethrough, force_share, opts);
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} else {
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qobject_unref(opts);
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qemuio_command_usage(&open_cmd);
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return -EINVAL;
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}
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if (ret) {
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return -EINVAL;
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}
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return 0;
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}
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static int quit_f(BlockBackend *blk, int argc, char **argv)
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{
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quit_qemu_io = true;
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return 0;
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}
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static const cmdinfo_t quit_cmd = {
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.name = "quit",
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.altname = "q",
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.cfunc = quit_f,
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.argmin = -1,
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.argmax = -1,
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.flags = CMD_FLAG_GLOBAL,
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.oneline = "exit the program",
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};
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static void usage(const char *name)
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{
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printf(
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"Usage: %s [OPTIONS]... [-c STRING]... [file]\n"
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"QEMU Disk exerciser\n"
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"\n"
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" --object OBJECTDEF define an object such as 'secret' for\n"
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" passwords and/or encryption keys\n"
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" --image-opts treat file as option string\n"
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" -c, --cmd STRING execute command with its arguments\n"
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" from the given string\n"
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" -f, --format FMT specifies the block driver to use\n"
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" -r, --read-only export read-only\n"
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" -s, --snapshot use snapshot file\n"
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" -n, --nocache disable host cache, short for -t none\n"
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" -C, --copy-on-read enable copy-on-read\n"
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" -m, --misalign misalign allocations for O_DIRECT\n"
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" -k, --native-aio use kernel AIO implementation\n"
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" (Linux only, prefer use of -i)\n"
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" -i, --aio=MODE use AIO mode (threads, native or io_uring)\n"
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" -t, --cache=MODE use the given cache mode for the image\n"
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" -d, --discard=MODE use the given discard mode for the image\n"
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" -T, --trace [[enable=]<pattern>][,events=<file>][,file=<file>]\n"
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" specify tracing options\n"
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" see qemu-img(1) man page for full description\n"
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" -U, --force-share force shared permissions\n"
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" -h, --help display this help and exit\n"
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" -V, --version output version information and exit\n"
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"\n"
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"See '%s -c help' for information on available commands.\n"
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"\n"
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QEMU_HELP_BOTTOM "\n",
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name, name);
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}
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static char *get_prompt(void)
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{
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static char prompt[FILENAME_MAX + 2 /*"> "*/ + 1 /*"\0"*/ ];
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if (!prompt[0]) {
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snprintf(prompt, sizeof(prompt), "%s> ", g_get_prgname());
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}
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return prompt;
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}
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static void G_GNUC_PRINTF(2, 3) readline_printf_func(void *opaque,
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const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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vprintf(fmt, ap);
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va_end(ap);
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}
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static void readline_flush_func(void *opaque)
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{
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fflush(stdout);
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}
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static void readline_func(void *opaque, const char *str, void *readline_opaque)
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{
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char **line = readline_opaque;
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*line = g_strdup(str);
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}
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static void completion_match(const char *cmd, void *opaque)
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{
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readline_add_completion(readline_state, cmd);
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}
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static void readline_completion_func(void *opaque, const char *str)
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{
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readline_set_completion_index(readline_state, strlen(str));
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qemuio_complete_command(str, completion_match, NULL);
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}
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static char *fetchline_readline(void)
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{
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char *line = NULL;
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readline_start(readline_state, get_prompt(), 0, readline_func, &line);
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while (!line) {
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int ch = getchar();
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if (ttyEOF != 0x0 && ch == ttyEOF) {
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printf("\n");
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break;
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}
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readline_handle_byte(readline_state, ch);
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}
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return line;
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}
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#define MAXREADLINESZ 1024
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static char *fetchline_fgets(void)
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{
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char *p, *line = g_malloc(MAXREADLINESZ);
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if (!fgets(line, MAXREADLINESZ, stdin)) {
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g_free(line);
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return NULL;
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}
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p = line + strlen(line);
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if (p != line && p[-1] == '\n') {
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p[-1] = '\0';
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}
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return line;
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}
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static char *fetchline(void)
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{
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if (readline_state) {
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return fetchline_readline();
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} else {
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return fetchline_fgets();
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}
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}
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static void prep_fetchline(void *opaque)
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{
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int *fetchable = opaque;
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qemu_set_fd_handler(STDIN_FILENO, NULL, NULL, NULL);
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*fetchable= 1;
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}
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static int do_qemuio_command(const char *cmd)
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{
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int ret;
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AioContext *ctx =
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qemuio_blk ? blk_get_aio_context(qemuio_blk) : qemu_get_aio_context();
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aio_context_acquire(ctx);
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ret = qemuio_command(qemuio_blk, cmd);
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aio_context_release(ctx);
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return ret;
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}
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static int command_loop(void)
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{
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int i, fetchable = 0, prompted = 0;
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int ret, last_error = 0;
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char *input;
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for (i = 0; !quit_qemu_io && i < ncmdline; i++) {
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ret = do_qemuio_command(cmdline[i]);
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if (ret < 0) {
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last_error = ret;
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}
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}
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if (cmdline) {
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g_free(cmdline);
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return last_error;
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}
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while (!quit_qemu_io) {
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if (!prompted) {
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printf("%s", get_prompt());
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fflush(stdout);
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qemu_set_fd_handler(STDIN_FILENO, prep_fetchline, NULL, &fetchable);
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prompted = 1;
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}
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main_loop_wait(false);
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if (!fetchable) {
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continue;
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}
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input = fetchline();
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if (input == NULL) {
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break;
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}
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ret = do_qemuio_command(input);
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g_free(input);
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if (ret < 0) {
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last_error = ret;
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}
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prompted = 0;
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fetchable = 0;
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}
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qemu_set_fd_handler(STDIN_FILENO, NULL, NULL, NULL);
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return last_error;
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}
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static void add_user_command(char *optarg)
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{
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cmdline = g_renew(char *, cmdline, ++ncmdline);
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cmdline[ncmdline-1] = optarg;
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}
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static void reenable_tty_echo(void)
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{
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qemu_set_tty_echo(STDIN_FILENO, true);
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}
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enum {
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OPTION_OBJECT = 256,
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OPTION_IMAGE_OPTS = 257,
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};
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static QemuOptsList file_opts = {
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.name = "file",
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.implied_opt_name = "file",
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.head = QTAILQ_HEAD_INITIALIZER(file_opts.head),
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.desc = {
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/* no elements => accept any params */
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{ /* end of list */ }
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},
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};
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int main(int argc, char **argv)
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{
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int readonly = 0;
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const char *sopt = "hVc:d:f:rsnCmki:t:T:U";
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const struct option lopt[] = {
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{ "help", no_argument, NULL, 'h' },
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{ "version", no_argument, NULL, 'V' },
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{ "cmd", required_argument, NULL, 'c' },
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{ "format", required_argument, NULL, 'f' },
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{ "read-only", no_argument, NULL, 'r' },
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{ "snapshot", no_argument, NULL, 's' },
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{ "nocache", no_argument, NULL, 'n' },
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{ "copy-on-read", no_argument, NULL, 'C' },
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{ "misalign", no_argument, NULL, 'm' },
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{ "native-aio", no_argument, NULL, 'k' },
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{ "aio", required_argument, NULL, 'i' },
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{ "discard", required_argument, NULL, 'd' },
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{ "cache", required_argument, NULL, 't' },
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{ "trace", required_argument, NULL, 'T' },
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{ "object", required_argument, NULL, OPTION_OBJECT },
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{ "image-opts", no_argument, NULL, OPTION_IMAGE_OPTS },
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{ "force-share", no_argument, 0, 'U'},
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{ NULL, 0, NULL, 0 }
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};
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int c;
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int opt_index = 0;
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int flags = BDRV_O_UNMAP;
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int ret;
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bool writethrough = true;
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QDict *opts = NULL;
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const char *format = NULL;
|
|
bool force_share = false;
|
|
|
|
#ifdef CONFIG_POSIX
|
|
signal(SIGPIPE, SIG_IGN);
|
|
#endif
|
|
|
|
socket_init();
|
|
error_init(argv[0]);
|
|
module_call_init(MODULE_INIT_TRACE);
|
|
qemu_init_exec_dir(argv[0]);
|
|
|
|
qcrypto_init(&error_fatal);
|
|
|
|
module_call_init(MODULE_INIT_QOM);
|
|
qemu_add_opts(&qemu_trace_opts);
|
|
bdrv_init();
|
|
|
|
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;
|
|
writethrough = false;
|
|
break;
|
|
case 'C':
|
|
flags |= BDRV_O_COPY_ON_READ;
|
|
break;
|
|
case 'd':
|
|
if (bdrv_parse_discard_flags(optarg, &flags) < 0) {
|
|
error_report("Invalid discard option: %s", optarg);
|
|
exit(1);
|
|
}
|
|
break;
|
|
case 'f':
|
|
format = optarg;
|
|
break;
|
|
case 'c':
|
|
add_user_command(optarg);
|
|
break;
|
|
case 'r':
|
|
readonly = 1;
|
|
break;
|
|
case 'm':
|
|
qemuio_misalign = true;
|
|
break;
|
|
case 'k':
|
|
flags |= BDRV_O_NATIVE_AIO;
|
|
break;
|
|
case 'i':
|
|
if (bdrv_parse_aio(optarg, &flags) < 0) {
|
|
error_report("Invalid aio option: %s", optarg);
|
|
exit(1);
|
|
}
|
|
break;
|
|
case 't':
|
|
if (bdrv_parse_cache_mode(optarg, &flags, &writethrough) < 0) {
|
|
error_report("Invalid cache option: %s", optarg);
|
|
exit(1);
|
|
}
|
|
break;
|
|
case 'T':
|
|
trace_opt_parse(optarg);
|
|
break;
|
|
case 'V':
|
|
printf("%s version " QEMU_FULL_VERSION "\n"
|
|
QEMU_COPYRIGHT "\n", g_get_prgname());
|
|
exit(0);
|
|
case 'h':
|
|
usage(g_get_prgname());
|
|
exit(0);
|
|
case 'U':
|
|
force_share = true;
|
|
break;
|
|
case OPTION_OBJECT:
|
|
user_creatable_process_cmdline(optarg);
|
|
break;
|
|
case OPTION_IMAGE_OPTS:
|
|
imageOpts = true;
|
|
break;
|
|
default:
|
|
usage(g_get_prgname());
|
|
exit(1);
|
|
}
|
|
}
|
|
|
|
if ((argc - optind) > 1) {
|
|
usage(g_get_prgname());
|
|
exit(1);
|
|
}
|
|
|
|
if (format && imageOpts) {
|
|
error_report("--image-opts and -f are mutually exclusive");
|
|
exit(1);
|
|
}
|
|
|
|
qemu_init_main_loop(&error_fatal);
|
|
|
|
if (!trace_init_backends()) {
|
|
exit(1);
|
|
}
|
|
trace_init_file();
|
|
qemu_set_log(LOG_TRACE, &error_fatal);
|
|
|
|
/* initialize commands */
|
|
qemuio_add_command(&quit_cmd);
|
|
qemuio_add_command(&open_cmd);
|
|
qemuio_add_command(&close_cmd);
|
|
|
|
if (isatty(STDIN_FILENO)) {
|
|
ttyEOF = get_eof_char();
|
|
readline_state = readline_init(readline_printf_func,
|
|
readline_flush_func,
|
|
NULL,
|
|
readline_completion_func);
|
|
qemu_set_tty_echo(STDIN_FILENO, false);
|
|
atexit(reenable_tty_echo);
|
|
}
|
|
|
|
/* open the device */
|
|
if (!readonly) {
|
|
flags |= BDRV_O_RDWR;
|
|
}
|
|
|
|
if ((argc - optind) == 1) {
|
|
if (imageOpts) {
|
|
QemuOpts *qopts = NULL;
|
|
qopts = qemu_opts_parse_noisily(&file_opts, argv[optind], false);
|
|
if (!qopts) {
|
|
exit(1);
|
|
}
|
|
opts = qemu_opts_to_qdict(qopts, NULL);
|
|
if (openfile(NULL, flags, writethrough, force_share, opts)) {
|
|
exit(1);
|
|
}
|
|
} else {
|
|
if (format) {
|
|
opts = qdict_new();
|
|
qdict_put_str(opts, "driver", format);
|
|
}
|
|
if (openfile(argv[optind], flags, writethrough,
|
|
force_share, opts)) {
|
|
exit(1);
|
|
}
|
|
}
|
|
}
|
|
ret = command_loop();
|
|
|
|
/*
|
|
* Make sure all outstanding requests complete before the program exits.
|
|
*/
|
|
bdrv_drain_all();
|
|
|
|
blk_unref(qemuio_blk);
|
|
g_free(readline_state);
|
|
|
|
if (ret < 0) {
|
|
return 1;
|
|
} else {
|
|
return 0;
|
|
}
|
|
}
|