--- /dev/null
+/*
+ * Command line utility to exercise the QEMU I/O path.
+ *
+ * Copyright (C) 2009 Red Hat, Inc.
+ * Copyright (c) 2003-2005 Silicon Graphics, Inc.
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+#include <sys/time.h>
+#include <sys/types.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <getopt.h>
+#include <libgen.h>
+
+#include "qemu-io.h"
+#include "qemu/error-report.h"
+#include "qemu/main-loop.h"
+#include "qemu/option.h"
+#include "qemu/config-file.h"
+#include "qemu/readline.h"
+#include "qapi/qmp/qstring.h"
+#include "sysemu/block-backend.h"
+#include "block/block_int.h"
+#include "trace/control.h"
+
+#define CMD_NOFILE_OK 0x01
+
+static char *progname;
+
+static BlockBackend *qemuio_blk;
+
+/* qemu-io commands passed using -c */
+static int ncmdline;
+static char **cmdline;
+
+static ReadLineState *readline_state;
+
+static int close_f(BlockBackend *blk, int argc, char **argv)
+{
+ blk_unref(qemuio_blk);
+ qemuio_blk = NULL;
+ return 0;
+}
+
+static const cmdinfo_t close_cmd = {
+ .name = "close",
+ .altname = "c",
+ .cfunc = close_f,
+ .oneline = "close the current open file",
+};
+
+static int openfile(char *name, int flags, QDict *opts)
+{
+ Error *local_err = NULL;
+ BlockDriverState *bs;
+
+ if (qemuio_blk) {
+ fprintf(stderr, "file open already, try 'help close'\n");
+ QDECREF(opts);
+ return 1;
+ }
+
+ qemuio_blk = blk_new_open("hda", name, NULL, opts, flags, &local_err);
+ if (!qemuio_blk) {
+ fprintf(stderr, "%s: can't open%s%s: %s\n", progname,
+ name ? " device " : "", name ?: "",
+ error_get_pretty(local_err));
+ error_free(local_err);
+ return 1;
+ }
+
+ bs = blk_bs(qemuio_blk);
+ if (bdrv_is_encrypted(bs)) {
+ char password[256];
+ printf("Disk image '%s' is encrypted.\n", name);
+ if (qemu_read_password(password, sizeof(password)) < 0) {
+ error_report("No password given");
+ goto error;
+ }
+ if (bdrv_set_key(bs, password) < 0) {
+ error_report("invalid password");
+ goto error;
+ }
+ }
+
+
+ return 0;
+
+ error:
+ blk_unref(qemuio_blk);
+ qemuio_blk = NULL;
+ return 1;
+}
+
+static void open_help(void)
+{
+ printf(
+"\n"
+" opens a new file in the requested mode\n"
+"\n"
+" Example:\n"
+" 'open -Cn /tmp/data' - creates/opens data file read-write and uncached\n"
+"\n"
+" Opens a file for subsequent use by all of the other qemu-io commands.\n"
+" -r, -- open file read-only\n"
+" -s, -- use snapshot file\n"
+" -n, -- disable host cache\n"
+" -o, -- options to be given to the block driver"
+"\n");
+}
+
+static int open_f(BlockBackend *blk, int argc, char **argv);
+
+static const cmdinfo_t open_cmd = {
+ .name = "open",
+ .altname = "o",
+ .cfunc = open_f,
+ .argmin = 1,
+ .argmax = -1,
+ .flags = CMD_NOFILE_OK,
+ .args = "[-Crsn] [-o options] [path]",
+ .oneline = "open the file specified by path",
+ .help = open_help,
+};
+
+static QemuOptsList empty_opts = {
+ .name = "drive",
+ .merge_lists = true,
+ .head = QTAILQ_HEAD_INITIALIZER(empty_opts.head),
+ .desc = {
+ /* no elements => accept any params */
+ { /* end of list */ }
+ },
+};
+
+static int open_f(BlockBackend *blk, int argc, char **argv)
+{
+ int flags = 0;
+ int readonly = 0;
+ int c;
+ QemuOpts *qopts;
+ QDict *opts;
+
+ while ((c = getopt(argc, argv, "snrgo:")) != -1) {
+ switch (c) {
+ case 's':
+ flags |= BDRV_O_SNAPSHOT;
+ break;
+ case 'n':
+ flags |= BDRV_O_NOCACHE | BDRV_O_CACHE_WB;
+ break;
+ case 'r':
+ readonly = 1;
+ break;
+ case 'o':
+ if (!qemu_opts_parse_noisily(&empty_opts, optarg, false)) {
+ printf("could not parse option list -- %s\n", optarg);
+ qemu_opts_reset(&empty_opts);
+ return 0;
+ }
+ break;
+ default:
+ qemu_opts_reset(&empty_opts);
+ return qemuio_command_usage(&open_cmd);
+ }
+ }
+
+ if (!readonly) {
+ flags |= BDRV_O_RDWR;
+ }
+
+ qopts = qemu_opts_find(&empty_opts, NULL);
+ opts = qopts ? qemu_opts_to_qdict(qopts, NULL) : NULL;
+ qemu_opts_reset(&empty_opts);
+
+ if (optind == argc - 1) {
+ return openfile(argv[optind], flags, opts);
+ } else if (optind == argc) {
+ return openfile(NULL, flags, opts);
+ } else {
+ QDECREF(opts);
+ return qemuio_command_usage(&open_cmd);
+ }
+}
+
+static int quit_f(BlockBackend *blk, int argc, char **argv)
+{
+ return 1;
+}
+
+static const cmdinfo_t quit_cmd = {
+ .name = "quit",
+ .altname = "q",
+ .cfunc = quit_f,
+ .argmin = -1,
+ .argmax = -1,
+ .flags = CMD_FLAG_GLOBAL,
+ .oneline = "exit the program",
+};
+
+static void usage(const char *name)
+{
+ printf(
+"Usage: %s [-h] [-V] [-rsnm] [-f FMT] [-c STRING] ... [file]\n"
+"QEMU Disk exerciser\n"
+"\n"
+" -c, --cmd STRING execute command with its arguments\n"
+" from the given string\n"
+" -f, --format FMT specifies the block driver to use\n"
+" -r, --read-only export read-only\n"
+" -s, --snapshot use snapshot file\n"
+" -n, --nocache disable host cache\n"
+" -m, --misalign misalign allocations for O_DIRECT\n"
+" -k, --native-aio use kernel AIO implementation (on Linux only)\n"
+" -t, --cache=MODE use the given cache mode for the image\n"
+" -T, --trace FILE enable trace events listed in the given file\n"
+" -h, --help display this help and exit\n"
+" -V, --version output version information and exit\n"
+"\n"
+"See '%s -c help' for information on available commands."
+"\n",
+ name, name);
+}
+
+static char *get_prompt(void)
+{
+ static char prompt[FILENAME_MAX + 2 /*"> "*/ + 1 /*"\0"*/ ];
+
+ if (!prompt[0]) {
+ snprintf(prompt, sizeof(prompt), "%s> ", progname);
+ }
+
+ return prompt;
+}
+
+static void GCC_FMT_ATTR(2, 3) readline_printf_func(void *opaque,
+ const char *fmt, ...)
+{
+ va_list ap;
+ va_start(ap, fmt);
+ vprintf(fmt, ap);
+ va_end(ap);
+}
+
+static void readline_flush_func(void *opaque)
+{
+ fflush(stdout);
+}
+
+static void readline_func(void *opaque, const char *str, void *readline_opaque)
+{
+ char **line = readline_opaque;
+ *line = g_strdup(str);
+}
+
+static void completion_match(const char *cmd, void *opaque)
+{
+ readline_add_completion(readline_state, cmd);
+}
+
+static void readline_completion_func(void *opaque, const char *str)
+{
+ readline_set_completion_index(readline_state, strlen(str));
+ qemuio_complete_command(str, completion_match, NULL);
+}
+
+static char *fetchline_readline(void)
+{
+ char *line = NULL;
+
+ readline_start(readline_state, get_prompt(), 0, readline_func, &line);
+ while (!line) {
+ int ch = getchar();
+ if (ch == EOF) {
+ break;
+ }
+ readline_handle_byte(readline_state, ch);
+ }
+ return line;
+}
+
+#define MAXREADLINESZ 1024
+static char *fetchline_fgets(void)
+{
+ char *p, *line = g_malloc(MAXREADLINESZ);
+
+ if (!fgets(line, MAXREADLINESZ, stdin)) {
+ g_free(line);
+ return NULL;
+ }
+
+ p = line + strlen(line);
+ if (p != line && p[-1] == '\n') {
+ p[-1] = '\0';
+ }
+
+ return line;
+}
+
+static char *fetchline(void)
+{
+ if (readline_state) {
+ return fetchline_readline();
+ } else {
+ return fetchline_fgets();
+ }
+}
+
+static void prep_fetchline(void *opaque)
+{
+ int *fetchable = opaque;
+
+ qemu_set_fd_handler(STDIN_FILENO, NULL, NULL, NULL);
+ *fetchable= 1;
+}
+
+static void command_loop(void)
+{
+ int i, done = 0, fetchable = 0, prompted = 0;
+ char *input;
+
+ for (i = 0; !done && i < ncmdline; i++) {
+ done = qemuio_command(qemuio_blk, cmdline[i]);
+ }
+ if (cmdline) {
+ g_free(cmdline);
+ return;
+ }
+
+ while (!done) {
+ if (!prompted) {
+ printf("%s", get_prompt());
+ fflush(stdout);
+ qemu_set_fd_handler(STDIN_FILENO, prep_fetchline, NULL, &fetchable);
+ prompted = 1;
+ }
+
+ main_loop_wait(false);
+
+ if (!fetchable) {
+ continue;
+ }
+
+ input = fetchline();
+ if (input == NULL) {
+ break;
+ }
+ done = qemuio_command(qemuio_blk, input);
+ g_free(input);
+
+ prompted = 0;
+ fetchable = 0;
+ }
+ qemu_set_fd_handler(STDIN_FILENO, NULL, NULL, NULL);
+}
+
+static void add_user_command(char *optarg)
+{
+ cmdline = g_renew(char *, cmdline, ++ncmdline);
+ cmdline[ncmdline-1] = optarg;
+}
+
+static void reenable_tty_echo(void)
+{
+ qemu_set_tty_echo(STDIN_FILENO, true);
+}
+
+int main(int argc, char **argv)
+{
+ int readonly = 0;
+ const char *sopt = "hVc:d:f:rsnmgkt:T:";
+ const struct option lopt[] = {
+ { "help", 0, NULL, 'h' },
+ { "version", 0, NULL, 'V' },
+ { "offset", 1, NULL, 'o' },
+ { "cmd", 1, NULL, 'c' },
+ { "format", 1, NULL, 'f' },
+ { "read-only", 0, NULL, 'r' },
+ { "snapshot", 0, NULL, 's' },
+ { "nocache", 0, NULL, 'n' },
+ { "misalign", 0, NULL, 'm' },
+ { "native-aio", 0, NULL, 'k' },
+ { "discard", 1, NULL, 'd' },
+ { "cache", 1, NULL, 't' },
+ { "trace", 1, NULL, 'T' },
+ { NULL, 0, NULL, 0 }
+ };
+ int c;
+ int opt_index = 0;
+ int flags = BDRV_O_UNMAP;
+ Error *local_error = NULL;
+ QDict *opts = NULL;
+
+#ifdef CONFIG_POSIX
+ signal(SIGPIPE, SIG_IGN);
+#endif
+
+ progname = basename(argv[0]);
+ qemu_init_exec_dir(argv[0]);
+
+ 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 | BDRV_O_CACHE_WB;
+ break;
+ case 'd':
+ if (bdrv_parse_discard_flags(optarg, &flags) < 0) {
+ error_report("Invalid discard option: %s", optarg);
+ exit(1);
+ }
+ break;
+ case 'f':
+ if (!opts) {
+ opts = qdict_new();
+ }
+ qdict_put(opts, "driver", qstring_from_str(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 't':
+ if (bdrv_parse_cache_flags(optarg, &flags) < 0) {
+ error_report("Invalid cache option: %s", optarg);
+ exit(1);
+ }
+ break;
+ case 'T':
+ if (!trace_init_backends(optarg, NULL)) {
+ exit(1); /* error message will have been printed */
+ }
+ break;
+ case 'V':
+ printf("%s version %s\n", progname, QEMU_VERSION);
+ exit(0);
+ case 'h':
+ usage(progname);
+ exit(0);
+ default:
+ usage(progname);
+ exit(1);
+ }
+ }
+
+ if ((argc - optind) > 1) {
+ usage(progname);
+ exit(1);
+ }
+
+ if (qemu_init_main_loop(&local_error)) {
+ error_report_err(local_error);
+ exit(1);
+ }
+
+ /* initialize commands */
+ qemuio_add_command(&quit_cmd);
+ qemuio_add_command(&open_cmd);
+ qemuio_add_command(&close_cmd);
+
+ if (isatty(STDIN_FILENO)) {
+ 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) {
+ openfile(argv[optind], flags, opts);
+ }
+ command_loop();
+
+ /*
+ * Make sure all outstanding requests complete before the program exits.
+ */
+ bdrv_drain_all();
+
+ blk_unref(qemuio_blk);
+ g_free(readline_state);
+ return 0;
+}
Code Review / kvmfornfv.git / blobdiff