435 lines
10 KiB
C
435 lines
10 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 <sys/time.h>
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#include <sys/types.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <getopt.h>
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#include <libgen.h>
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#include "qemu-io.h"
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#include "qemu/main-loop.h"
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#include "block/block_int.h"
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#include "trace/control.h"
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#define CMD_NOFILE_OK 0x01
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char *progname;
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BlockDriverState *qemuio_bs;
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extern int qemuio_misalign;
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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 int close_f(BlockDriverState *bs, int argc, char **argv)
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{
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bdrv_unref(bs);
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qemuio_bs = 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, int growable)
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{
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Error *local_err = NULL;
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if (qemuio_bs) {
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fprintf(stderr, "file open already, try 'help close'\n");
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return 1;
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}
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if (growable) {
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if (bdrv_file_open(&qemuio_bs, name, NULL, flags, &local_err)) {
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fprintf(stderr, "%s: can't open device %s: %s\n", progname, name,
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error_get_pretty(local_err));
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error_free(local_err);
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return 1;
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}
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} else {
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qemuio_bs = bdrv_new("hda");
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if (bdrv_open(qemuio_bs, name, NULL, flags, NULL, &local_err) < 0) {
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fprintf(stderr, "%s: can't open device %s: %s\n", progname, name,
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error_get_pretty(local_err));
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error_free(local_err);
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bdrv_unref(qemuio_bs);
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qemuio_bs = NULL;
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return 1;
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}
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}
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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 -Cn /tmp/data' - creates/opens data file read-write and 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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" -n, -- disable host cache\n"
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" -g, -- allow file to grow (only applies to protocols)"
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"\n");
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}
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static int open_f(BlockDriverState *bs, 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 = "[-Crsn] [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 int open_f(BlockDriverState *bs, int argc, char **argv)
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{
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int flags = 0;
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int readonly = 0;
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int growable = 0;
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int c;
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while ((c = getopt(argc, argv, "snrg")) != EOF) {
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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 | BDRV_O_CACHE_WB;
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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 'g':
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growable = 1;
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break;
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default:
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return qemuio_command_usage(&open_cmd);
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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 (optind != argc - 1) {
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return qemuio_command_usage(&open_cmd);
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}
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return openfile(argv[optind], flags, growable);
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}
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static int quit_f(BlockDriverState *bs, int argc, char **argv)
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{
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return 1;
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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 [-h] [-V] [-rsnm] [-c cmd] ... [file]\n"
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"QEMU Disk exerciser\n"
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"\n"
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" -c, --cmd command to execute\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\n"
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" -g, --growable allow file to grow (only applies to protocols)\n"
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" -m, --misalign misalign allocations for O_DIRECT\n"
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" -k, --native-aio use kernel AIO implementation (on Linux only)\n"
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" -t, --cache=MODE use the given cache mode for the image\n"
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" -T, --trace FILE enable trace events listed in the given file\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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name);
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}
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#if defined(ENABLE_READLINE)
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# include <readline/history.h>
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# include <readline/readline.h>
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#elif defined(ENABLE_EDITLINE)
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# include <histedit.h>
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#endif
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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> ", progname);
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}
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return prompt;
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}
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#if defined(ENABLE_READLINE)
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static char *fetchline(void)
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{
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char *line = readline(get_prompt());
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if (line && *line) {
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add_history(line);
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}
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return line;
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}
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#elif defined(ENABLE_EDITLINE)
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static char *el_get_prompt(EditLine *e)
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{
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return get_prompt();
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}
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static char *fetchline(void)
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{
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static EditLine *el;
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static History *hist;
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HistEvent hevent;
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char *line;
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int count;
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if (!el) {
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hist = history_init();
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history(hist, &hevent, H_SETSIZE, 100);
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el = el_init(progname, stdin, stdout, stderr);
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el_source(el, NULL);
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el_set(el, EL_SIGNAL, 1);
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el_set(el, EL_PROMPT, el_get_prompt);
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el_set(el, EL_HIST, history, (const char *)hist);
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}
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line = strdup(el_gets(el, &count));
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if (line) {
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if (count > 0) {
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line[count-1] = '\0';
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}
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if (*line) {
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history(hist, &hevent, H_ENTER, line);
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}
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}
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return line;
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}
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#else
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# define MAXREADLINESZ 1024
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static char *fetchline(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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#endif
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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 void command_loop(void)
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{
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int i, done = 0, fetchable = 0, prompted = 0;
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char *input;
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for (i = 0; !done && i < ncmdline; i++) {
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done = qemuio_command(qemuio_bs, cmdline[i]);
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}
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if (cmdline) {
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g_free(cmdline);
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return;
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}
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while (!done) {
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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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done = qemuio_command(qemuio_bs, input);
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g_free(input);
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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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}
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static void add_user_command(char *optarg)
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{
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cmdline = g_realloc(cmdline, ++ncmdline * sizeof(char *));
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cmdline[ncmdline-1] = optarg;
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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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int growable = 0;
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const char *sopt = "hVc:d:rsnmgkt:T:";
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const struct option lopt[] = {
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{ "help", 0, NULL, 'h' },
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{ "version", 0, NULL, 'V' },
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{ "offset", 1, NULL, 'o' },
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{ "cmd", 1, NULL, 'c' },
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{ "read-only", 0, NULL, 'r' },
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{ "snapshot", 0, NULL, 's' },
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{ "nocache", 0, NULL, 'n' },
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{ "misalign", 0, NULL, 'm' },
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{ "growable", 0, NULL, 'g' },
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{ "native-aio", 0, NULL, 'k' },
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{ "discard", 1, NULL, 'd' },
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{ "cache", 1, NULL, 't' },
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{ "trace", 1, NULL, 'T' },
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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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#ifdef CONFIG_POSIX
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signal(SIGPIPE, SIG_IGN);
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#endif
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progname = basename(argv[0]);
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while ((c = getopt_long(argc, argv, sopt, lopt, &opt_index)) != -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 | BDRV_O_CACHE_WB;
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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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exit(1);
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}
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break;
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case 'c':
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add_user_command(optarg);
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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 'm':
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qemuio_misalign = 1;
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break;
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case 'g':
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growable = 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_flags(optarg, &flags) < 0) {
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error_report("Invalid cache option: %s", optarg);
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exit(1);
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}
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break;
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case 'T':
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if (!trace_backend_init(optarg, NULL)) {
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exit(1); /* error message will have been printed */
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}
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break;
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case 'V':
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printf("%s version %s\n", progname, QEMU_VERSION);
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exit(0);
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case 'h':
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usage(progname);
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exit(0);
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default:
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usage(progname);
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exit(1);
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}
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}
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if ((argc - optind) > 1) {
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usage(progname);
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exit(1);
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}
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qemu_init_main_loop();
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bdrv_init();
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/* initialize commands */
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qemuio_add_command(&quit_cmd);
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qemuio_add_command(&open_cmd);
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qemuio_add_command(&close_cmd);
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/* open the device */
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if (!readonly) {
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flags |= BDRV_O_RDWR;
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}
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if ((argc - optind) == 1) {
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openfile(argv[optind], flags, growable);
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}
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command_loop();
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/*
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* Make sure all outstanding requests complete before the program exits.
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*/
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bdrv_drain_all();
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if (qemuio_bs) {
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bdrv_unref(qemuio_bs);
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}
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return 0;
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}
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