2 * Command line utility to exercise the QEMU I/O path.
4 * Copyright (C) 2009 Red Hat, Inc.
5 * Copyright (c) 2003-2005 Silicon Graphics, Inc.
7 * This work is licensed under the terms of the GNU GPL, version 2 or later.
8 * See the COPYING file in the top-level directory.
10 #include "qemu/osdep.h"
15 #include "qemu/error-report.h"
16 #include "qemu/main-loop.h"
17 #include "qemu/option.h"
18 #include "qemu/config-file.h"
19 #include "qemu/readline.h"
20 #include "qapi/qmp/qstring.h"
21 #include "qom/object_interfaces.h"
22 #include "sysemu/block-backend.h"
23 #include "block/block_int.h"
24 #include "trace/control.h"
26 #define CMD_NOFILE_OK 0x01
28 static char *progname;
30 static BlockBackend *qemuio_blk;
32 /* qemu-io commands passed using -c */
34 static char **cmdline;
35 static bool imageOpts;
37 static ReadLineState *readline_state;
39 static int close_f(BlockBackend *blk, int argc, char **argv)
41 blk_unref(qemuio_blk);
46 static const cmdinfo_t close_cmd = {
50 .oneline = "close the current open file",
53 static int openfile(char *name, int flags, QDict *opts)
55 Error *local_err = NULL;
59 error_report("file open already, try 'help close'");
64 qemuio_blk = blk_new_open("hda", name, NULL, opts, flags, &local_err);
66 error_reportf_err(local_err, "can't open%s%s: ",
67 name ? " device " : "", name ?: "");
71 bs = blk_bs(qemuio_blk);
72 if (bdrv_is_encrypted(bs)) {
74 printf("Disk image '%s' is encrypted.\n", name);
75 if (qemu_read_password(password, sizeof(password)) < 0) {
76 error_report("No password given");
79 if (bdrv_set_key(bs, password) < 0) {
80 error_report("invalid password");
89 blk_unref(qemuio_blk);
94 static void open_help(void)
98 " opens a new file in the requested mode\n"
101 " 'open -Cn /tmp/data' - creates/opens data file read-write and uncached\n"
103 " Opens a file for subsequent use by all of the other qemu-io commands.\n"
104 " -r, -- open file read-only\n"
105 " -s, -- use snapshot file\n"
106 " -n, -- disable host cache\n"
107 " -o, -- options to be given to the block driver"
111 static int open_f(BlockBackend *blk, int argc, char **argv);
113 static const cmdinfo_t open_cmd = {
119 .flags = CMD_NOFILE_OK,
120 .args = "[-Crsn] [-o options] [path]",
121 .oneline = "open the file specified by path",
125 static QemuOptsList empty_opts = {
128 .head = QTAILQ_HEAD_INITIALIZER(empty_opts.head),
130 /* no elements => accept any params */
131 { /* end of list */ }
135 static int open_f(BlockBackend *blk, int argc, char **argv)
143 while ((c = getopt(argc, argv, "snrgo:")) != -1) {
146 flags |= BDRV_O_SNAPSHOT;
149 flags |= BDRV_O_NOCACHE | BDRV_O_CACHE_WB;
156 printf("--image-opts and 'open -o' are mutually exclusive\n");
159 if (!qemu_opts_parse_noisily(&empty_opts, optarg, false)) {
160 qemu_opts_reset(&empty_opts);
165 qemu_opts_reset(&empty_opts);
166 return qemuio_command_usage(&open_cmd);
171 flags |= BDRV_O_RDWR;
174 if (imageOpts && (optind == argc - 1)) {
175 if (!qemu_opts_parse_noisily(&empty_opts, argv[optind], false)) {
176 qemu_opts_reset(&empty_opts);
182 qopts = qemu_opts_find(&empty_opts, NULL);
183 opts = qopts ? qemu_opts_to_qdict(qopts, NULL) : NULL;
184 qemu_opts_reset(&empty_opts);
186 if (optind == argc - 1) {
187 return openfile(argv[optind], flags, opts);
188 } else if (optind == argc) {
189 return openfile(NULL, flags, opts);
192 return qemuio_command_usage(&open_cmd);
196 static int quit_f(BlockBackend *blk, int argc, char **argv)
201 static const cmdinfo_t quit_cmd = {
207 .flags = CMD_FLAG_GLOBAL,
208 .oneline = "exit the program",
211 static void usage(const char *name)
214 "Usage: %s [-h] [-V] [-rsnm] [-f FMT] [-c STRING] ... [file]\n"
215 "QEMU Disk exerciser\n"
217 " --object OBJECTDEF define an object such as 'secret' for\n"
218 " passwords and/or encryption keys\n"
219 " -c, --cmd STRING execute command with its arguments\n"
220 " from the given string\n"
221 " -f, --format FMT specifies the block driver to use\n"
222 " -r, --read-only export read-only\n"
223 " -s, --snapshot use snapshot file\n"
224 " -n, --nocache disable host cache\n"
225 " -m, --misalign misalign allocations for O_DIRECT\n"
226 " -k, --native-aio use kernel AIO implementation (on Linux only)\n"
227 " -t, --cache=MODE use the given cache mode for the image\n"
228 " -T, --trace FILE enable trace events listed in the given file\n"
229 " -h, --help display this help and exit\n"
230 " -V, --version output version information and exit\n"
232 "See '%s -c help' for information on available commands."
237 static char *get_prompt(void)
239 static char prompt[FILENAME_MAX + 2 /*"> "*/ + 1 /*"\0"*/ ];
242 snprintf(prompt, sizeof(prompt), "%s> ", progname);
248 static void GCC_FMT_ATTR(2, 3) readline_printf_func(void *opaque,
249 const char *fmt, ...)
257 static void readline_flush_func(void *opaque)
262 static void readline_func(void *opaque, const char *str, void *readline_opaque)
264 char **line = readline_opaque;
265 *line = g_strdup(str);
268 static void completion_match(const char *cmd, void *opaque)
270 readline_add_completion(readline_state, cmd);
273 static void readline_completion_func(void *opaque, const char *str)
275 readline_set_completion_index(readline_state, strlen(str));
276 qemuio_complete_command(str, completion_match, NULL);
279 static char *fetchline_readline(void)
283 readline_start(readline_state, get_prompt(), 0, readline_func, &line);
289 readline_handle_byte(readline_state, ch);
294 #define MAXREADLINESZ 1024
295 static char *fetchline_fgets(void)
297 char *p, *line = g_malloc(MAXREADLINESZ);
299 if (!fgets(line, MAXREADLINESZ, stdin)) {
304 p = line + strlen(line);
305 if (p != line && p[-1] == '\n') {
312 static char *fetchline(void)
314 if (readline_state) {
315 return fetchline_readline();
317 return fetchline_fgets();
321 static void prep_fetchline(void *opaque)
323 int *fetchable = opaque;
325 qemu_set_fd_handler(STDIN_FILENO, NULL, NULL, NULL);
329 static void command_loop(void)
331 int i, done = 0, fetchable = 0, prompted = 0;
334 for (i = 0; !done && i < ncmdline; i++) {
335 done = qemuio_command(qemuio_blk, cmdline[i]);
344 printf("%s", get_prompt());
346 qemu_set_fd_handler(STDIN_FILENO, prep_fetchline, NULL, &fetchable);
350 main_loop_wait(false);
360 done = qemuio_command(qemuio_blk, input);
366 qemu_set_fd_handler(STDIN_FILENO, NULL, NULL, NULL);
369 static void add_user_command(char *optarg)
371 cmdline = g_renew(char *, cmdline, ++ncmdline);
372 cmdline[ncmdline-1] = optarg;
375 static void reenable_tty_echo(void)
377 qemu_set_tty_echo(STDIN_FILENO, true);
382 OPTION_IMAGE_OPTS = 257,
385 static QemuOptsList qemu_object_opts = {
387 .implied_opt_name = "qom-type",
388 .head = QTAILQ_HEAD_INITIALIZER(qemu_object_opts.head),
395 static QemuOptsList file_opts = {
397 .implied_opt_name = "file",
398 .head = QTAILQ_HEAD_INITIALIZER(file_opts.head),
400 /* no elements => accept any params */
401 { /* end of list */ }
405 int main(int argc, char **argv)
408 const char *sopt = "hVc:d:f:rsnmgkt:T:";
409 const struct option lopt[] = {
410 { "help", no_argument, NULL, 'h' },
411 { "version", no_argument, NULL, 'V' },
412 { "offset", required_argument, NULL, 'o' },
413 { "cmd", required_argument, NULL, 'c' },
414 { "format", required_argument, NULL, 'f' },
415 { "read-only", no_argument, NULL, 'r' },
416 { "snapshot", no_argument, NULL, 's' },
417 { "nocache", no_argument, NULL, 'n' },
418 { "misalign", no_argument, NULL, 'm' },
419 { "native-aio", no_argument, NULL, 'k' },
420 { "discard", required_argument, NULL, 'd' },
421 { "cache", required_argument, NULL, 't' },
422 { "trace", required_argument, NULL, 'T' },
423 { "object", required_argument, NULL, OPTION_OBJECT },
424 { "image-opts", no_argument, NULL, OPTION_IMAGE_OPTS },
429 int flags = BDRV_O_UNMAP;
430 Error *local_error = NULL;
432 const char *format = NULL;
435 signal(SIGPIPE, SIG_IGN);
438 progname = basename(argv[0]);
439 qemu_init_exec_dir(argv[0]);
441 module_call_init(MODULE_INIT_QOM);
442 qemu_add_opts(&qemu_object_opts);
445 while ((c = getopt_long(argc, argv, sopt, lopt, &opt_index)) != -1) {
448 flags |= BDRV_O_SNAPSHOT;
451 flags |= BDRV_O_NOCACHE | BDRV_O_CACHE_WB;
454 if (bdrv_parse_discard_flags(optarg, &flags) < 0) {
455 error_report("Invalid discard option: %s", optarg);
463 add_user_command(optarg);
469 qemuio_misalign = true;
472 flags |= BDRV_O_NATIVE_AIO;
475 if (bdrv_parse_cache_flags(optarg, &flags) < 0) {
476 error_report("Invalid cache option: %s", optarg);
481 if (!trace_init_backends()) {
482 exit(1); /* error message will have been printed */
486 printf("%s version %s\n", progname, QEMU_VERSION);
491 case OPTION_OBJECT: {
493 qopts = qemu_opts_parse_noisily(&qemu_object_opts,
499 case OPTION_IMAGE_OPTS:
508 if ((argc - optind) > 1) {
513 if (format && imageOpts) {
514 error_report("--image-opts and -f are mutually exclusive");
518 if (qemu_init_main_loop(&local_error)) {
519 error_report_err(local_error);
523 if (qemu_opts_foreach(&qemu_object_opts,
524 user_creatable_add_opts_foreach,
525 NULL, &local_error)) {
526 error_report_err(local_error);
530 /* initialize commands */
531 qemuio_add_command(&quit_cmd);
532 qemuio_add_command(&open_cmd);
533 qemuio_add_command(&close_cmd);
535 if (isatty(STDIN_FILENO)) {
536 readline_state = readline_init(readline_printf_func,
539 readline_completion_func);
540 qemu_set_tty_echo(STDIN_FILENO, false);
541 atexit(reenable_tty_echo);
544 /* open the device */
546 flags |= BDRV_O_RDWR;
549 if ((argc - optind) == 1) {
551 QemuOpts *qopts = NULL;
552 qopts = qemu_opts_parse_noisily(&file_opts, argv[optind], false);
556 opts = qemu_opts_to_qdict(qopts, NULL);
557 openfile(NULL, flags, opts);
561 qdict_put(opts, "driver", qstring_from_str(format));
563 openfile(argv[optind], flags, opts);
569 * Make sure all outstanding requests complete before the program exits.
573 blk_unref(qemuio_blk);
574 g_free(readline_state);