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/*
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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"*/ ];
194

    
195
    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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296
        if (!fetchable) {
297
            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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{
315
    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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{
321
    int readonly = 0;
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    int growable = 0;
323
    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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350
    while ((c = getopt_long(argc, argv, sopt, lopt, &opt_index)) != -1) {
351
        switch (c) {
352
        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) {
360
                error_report("Invalid discard option: %s", optarg);
361
                exit(1);
362
            }
363
            break;
364
        case 'c':
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            add_user_command(optarg);
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            break;
367
        case 'r':
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            readonly = 1;
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            break;
370
        case 'm':
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            qemuio_misalign = 1;
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            break;
373
        case 'g':
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            growable = 1;
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            break;
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        case 'k':
377
            flags |= BDRV_O_NATIVE_AIO;
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            break;
379
        case 't':
380
            if (bdrv_parse_cache_flags(optarg, &flags) < 0) {
381
                error_report("Invalid cache option: %s", optarg);
382
                exit(1);
383
            }
384
            break;
385
        case 'T':
386
            if (!trace_backend_init(optarg, NULL)) {
387
                exit(1); /* error message will have been printed */
388
            }
389
            break;
390
        case 'V':
391
            printf("%s version %s\n", progname, QEMU_VERSION);
392
            exit(0);
393
        case 'h':
394
            usage(progname);
395
            exit(0);
396
        default:
397
            usage(progname);
398
            exit(1);
399
        }
400
    }
401

    
402
    if ((argc - optind) > 1) {
403
        usage(progname);
404
        exit(1);
405
    }
406

    
407
    qemu_init_main_loop();
408
    bdrv_init();
409

    
410
    /* initialize commands */
411
    qemuio_add_command(&quit_cmd);
412
    qemuio_add_command(&open_cmd);
413
    qemuio_add_command(&close_cmd);
414

    
415
    /* open the device */
416
    if (!readonly) {
417
        flags |= BDRV_O_RDWR;
418
    }
419

    
420
    if ((argc - optind) == 1) {
421
        openfile(argv[optind], flags, growable);
422
    }
423
    command_loop();
424

    
425
    /*
426
     * Make sure all outstanding requests complete before the program exits.
427
     */
428
    bdrv_drain_all();
429

    
430
    if (qemuio_bs) {
431
        bdrv_unref(qemuio_bs);
432
    }
433
    return 0;
434
}