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"
14 #include "qapi/error.h"
16 #include "qemu/error-report.h"
17 #include "qemu/main-loop.h"
18 #include "qemu/option.h"
19 #include "qemu/config-file.h"
20 #include "qemu/readline.h"
22 #include "qapi/qmp/qstring.h"
23 #include "qapi/qmp/qbool.h"
24 #include "qom/object_interfaces.h"
25 #include "sysemu/block-backend.h"
26 #include "block/block_int.h"
27 #include "trace/control.h"
28 #include "crypto/init.h"
30 #define CMD_NOFILE_OK 0x01
32 static char *progname;
34 static BlockBackend *qemuio_blk;
36 /* qemu-io commands passed using -c */
38 static char **cmdline;
39 static bool imageOpts;
41 static ReadLineState *readline_state;
43 static int close_f(BlockBackend *blk, int argc, char **argv)
45 blk_unref(qemuio_blk);
50 static const cmdinfo_t close_cmd = {
54 .oneline = "close the current open file",
57 static int openfile(char *name, int flags, bool writethrough, bool force_share,
60 Error *local_err = NULL;
64 error_report("file open already, try 'help close'");
73 if (qdict_haskey(opts, BDRV_OPT_FORCE_SHARE)
74 && !qdict_get_bool(opts, BDRV_OPT_FORCE_SHARE)) {
75 error_report("-U conflicts with image options");
79 qdict_put_bool(opts, BDRV_OPT_FORCE_SHARE, true);
81 qemuio_blk = blk_new_open(name, NULL, opts, flags, &local_err);
83 error_reportf_err(local_err, "can't open%s%s: ",
84 name ? " device " : "", name ?: "");
88 bs = blk_bs(qemuio_blk);
89 if (bdrv_is_encrypted(bs) && bdrv_key_required(bs)) {
91 printf("Disk image '%s' is encrypted.\n", name);
92 if (qemu_read_password(password, sizeof(password)) < 0) {
93 error_report("No password given");
96 if (bdrv_set_key(bs, password) < 0) {
97 error_report("invalid password");
102 blk_set_enable_write_cache(qemuio_blk, !writethrough);
107 blk_unref(qemuio_blk);
112 static void open_help(void)
116 " opens a new file in the requested mode\n"
119 " 'open -n -o driver=raw /tmp/data' - opens raw data file read-write, uncached\n"
121 " Opens a file for subsequent use by all of the other qemu-io commands.\n"
122 " -r, -- open file read-only\n"
123 " -s, -- use snapshot file\n"
124 " -n, -- disable host cache, short for -t none\n"
125 " -U, -- force shared permissions\n"
126 " -k, -- use kernel AIO implementation (on Linux only)\n"
127 " -t, -- use the given cache mode for the image\n"
128 " -d, -- use the given discard mode for the image\n"
129 " -o, -- options to be given to the block driver"
133 static int open_f(BlockBackend *blk, int argc, char **argv);
135 static const cmdinfo_t open_cmd = {
141 .flags = CMD_NOFILE_OK,
142 .args = "[-rsnkU] [-t cache] [-d discard] [-o options] [path]",
143 .oneline = "open the file specified by path",
147 static QemuOptsList empty_opts = {
150 .head = QTAILQ_HEAD_INITIALIZER(empty_opts.head),
152 /* no elements => accept any params */
153 { /* end of list */ }
157 static int open_f(BlockBackend *blk, int argc, char **argv)
159 int flags = BDRV_O_UNMAP;
161 bool writethrough = true;
165 bool force_share = false;
167 while ((c = getopt(argc, argv, "snro:kt:d:U")) != -1) {
170 flags |= BDRV_O_SNAPSHOT;
173 flags |= BDRV_O_NOCACHE;
174 writethrough = false;
180 flags |= BDRV_O_NATIVE_AIO;
183 if (bdrv_parse_cache_mode(optarg, &flags, &writethrough) < 0) {
184 error_report("Invalid cache option: %s", optarg);
185 qemu_opts_reset(&empty_opts);
190 if (bdrv_parse_discard_flags(optarg, &flags) < 0) {
191 error_report("Invalid discard option: %s", optarg);
192 qemu_opts_reset(&empty_opts);
198 printf("--image-opts and 'open -o' are mutually exclusive\n");
199 qemu_opts_reset(&empty_opts);
202 if (!qemu_opts_parse_noisily(&empty_opts, optarg, false)) {
203 qemu_opts_reset(&empty_opts);
211 qemu_opts_reset(&empty_opts);
212 return qemuio_command_usage(&open_cmd);
217 flags |= BDRV_O_RDWR;
220 if (imageOpts && (optind == argc - 1)) {
221 if (!qemu_opts_parse_noisily(&empty_opts, argv[optind], false)) {
222 qemu_opts_reset(&empty_opts);
228 qopts = qemu_opts_find(&empty_opts, NULL);
229 opts = qopts ? qemu_opts_to_qdict(qopts, NULL) : NULL;
230 qemu_opts_reset(&empty_opts);
232 if (optind == argc - 1) {
233 return openfile(argv[optind], flags, writethrough, force_share, opts);
234 } else if (optind == argc) {
235 return openfile(NULL, flags, writethrough, force_share, opts);
238 return qemuio_command_usage(&open_cmd);
242 static int quit_f(BlockBackend *blk, int argc, char **argv)
247 static const cmdinfo_t quit_cmd = {
253 .flags = CMD_FLAG_GLOBAL,
254 .oneline = "exit the program",
257 static void usage(const char *name)
260 "Usage: %s [OPTIONS]... [-c STRING]... [file]\n"
261 "QEMU Disk exerciser\n"
263 " --object OBJECTDEF define an object such as 'secret' for\n"
264 " passwords and/or encryption keys\n"
265 " --image-opts treat file as option string\n"
266 " -c, --cmd STRING execute command with its arguments\n"
267 " from the given string\n"
268 " -f, --format FMT specifies the block driver to use\n"
269 " -r, --read-only export read-only\n"
270 " -s, --snapshot use snapshot file\n"
271 " -n, --nocache disable host cache, short for -t none\n"
272 " -m, --misalign misalign allocations for O_DIRECT\n"
273 " -k, --native-aio use kernel AIO implementation (on Linux only)\n"
274 " -t, --cache=MODE use the given cache mode for the image\n"
275 " -d, --discard=MODE use the given discard mode for the image\n"
276 " -T, --trace [[enable=]<pattern>][,events=<file>][,file=<file>]\n"
277 " specify tracing options\n"
278 " see qemu-img(1) man page for full description\n"
279 " -U, --force-share force shared permissions\n"
280 " -h, --help display this help and exit\n"
281 " -V, --version output version information and exit\n"
283 "See '%s -c help' for information on available commands."
288 static char *get_prompt(void)
290 static char prompt[FILENAME_MAX + 2 /*"> "*/ + 1 /*"\0"*/ ];
293 snprintf(prompt, sizeof(prompt), "%s> ", progname);
299 static void GCC_FMT_ATTR(2, 3) readline_printf_func(void *opaque,
300 const char *fmt, ...)
308 static void readline_flush_func(void *opaque)
313 static void readline_func(void *opaque, const char *str, void *readline_opaque)
315 char **line = readline_opaque;
316 *line = g_strdup(str);
319 static void completion_match(const char *cmd, void *opaque)
321 readline_add_completion(readline_state, cmd);
324 static void readline_completion_func(void *opaque, const char *str)
326 readline_set_completion_index(readline_state, strlen(str));
327 qemuio_complete_command(str, completion_match, NULL);
330 static char *fetchline_readline(void)
334 readline_start(readline_state, get_prompt(), 0, readline_func, &line);
340 readline_handle_byte(readline_state, ch);
345 #define MAXREADLINESZ 1024
346 static char *fetchline_fgets(void)
348 char *p, *line = g_malloc(MAXREADLINESZ);
350 if (!fgets(line, MAXREADLINESZ, stdin)) {
355 p = line + strlen(line);
356 if (p != line && p[-1] == '\n') {
363 static char *fetchline(void)
365 if (readline_state) {
366 return fetchline_readline();
368 return fetchline_fgets();
372 static void prep_fetchline(void *opaque)
374 int *fetchable = opaque;
376 qemu_set_fd_handler(STDIN_FILENO, NULL, NULL, NULL);
380 static void command_loop(void)
382 int i, done = 0, fetchable = 0, prompted = 0;
385 for (i = 0; !done && i < ncmdline; i++) {
386 done = qemuio_command(qemuio_blk, cmdline[i]);
395 printf("%s", get_prompt());
397 qemu_set_fd_handler(STDIN_FILENO, prep_fetchline, NULL, &fetchable);
401 main_loop_wait(false);
411 done = qemuio_command(qemuio_blk, input);
417 qemu_set_fd_handler(STDIN_FILENO, NULL, NULL, NULL);
420 static void add_user_command(char *optarg)
422 cmdline = g_renew(char *, cmdline, ++ncmdline);
423 cmdline[ncmdline-1] = optarg;
426 static void reenable_tty_echo(void)
428 qemu_set_tty_echo(STDIN_FILENO, true);
433 OPTION_IMAGE_OPTS = 257,
436 static QemuOptsList qemu_object_opts = {
438 .implied_opt_name = "qom-type",
439 .head = QTAILQ_HEAD_INITIALIZER(qemu_object_opts.head),
446 static QemuOptsList file_opts = {
448 .implied_opt_name = "file",
449 .head = QTAILQ_HEAD_INITIALIZER(file_opts.head),
451 /* no elements => accept any params */
452 { /* end of list */ }
456 int main(int argc, char **argv)
459 const char *sopt = "hVc:d:f:rsnmkt:T:U";
460 const struct option lopt[] = {
461 { "help", no_argument, NULL, 'h' },
462 { "version", no_argument, NULL, 'V' },
463 { "cmd", required_argument, NULL, 'c' },
464 { "format", required_argument, NULL, 'f' },
465 { "read-only", no_argument, NULL, 'r' },
466 { "snapshot", no_argument, NULL, 's' },
467 { "nocache", no_argument, NULL, 'n' },
468 { "misalign", no_argument, NULL, 'm' },
469 { "native-aio", no_argument, NULL, 'k' },
470 { "discard", required_argument, NULL, 'd' },
471 { "cache", required_argument, NULL, 't' },
472 { "trace", required_argument, NULL, 'T' },
473 { "object", required_argument, NULL, OPTION_OBJECT },
474 { "image-opts", no_argument, NULL, OPTION_IMAGE_OPTS },
475 { "force-share", no_argument, 0, 'U'},
480 int flags = BDRV_O_UNMAP;
481 bool writethrough = true;
482 Error *local_error = NULL;
484 const char *format = NULL;
485 char *trace_file = NULL;
486 bool force_share = false;
489 signal(SIGPIPE, SIG_IGN);
492 module_call_init(MODULE_INIT_TRACE);
493 progname = basename(argv[0]);
494 qemu_init_exec_dir(argv[0]);
496 qcrypto_init(&error_fatal);
498 module_call_init(MODULE_INIT_QOM);
499 qemu_add_opts(&qemu_object_opts);
500 qemu_add_opts(&qemu_trace_opts);
503 while ((c = getopt_long(argc, argv, sopt, lopt, &opt_index)) != -1) {
506 flags |= BDRV_O_SNAPSHOT;
509 flags |= BDRV_O_NOCACHE;
510 writethrough = false;
513 if (bdrv_parse_discard_flags(optarg, &flags) < 0) {
514 error_report("Invalid discard option: %s", optarg);
522 add_user_command(optarg);
528 qemuio_misalign = true;
531 flags |= BDRV_O_NATIVE_AIO;
534 if (bdrv_parse_cache_mode(optarg, &flags, &writethrough) < 0) {
535 error_report("Invalid cache option: %s", optarg);
541 trace_file = trace_opt_parse(optarg);
544 printf("%s version %s\n", progname, QEMU_VERSION);
552 case OPTION_OBJECT: {
554 qopts = qemu_opts_parse_noisily(&qemu_object_opts,
560 case OPTION_IMAGE_OPTS:
569 if ((argc - optind) > 1) {
574 if (format && imageOpts) {
575 error_report("--image-opts and -f are mutually exclusive");
579 if (qemu_init_main_loop(&local_error)) {
580 error_report_err(local_error);
584 if (qemu_opts_foreach(&qemu_object_opts,
585 user_creatable_add_opts_foreach,
590 if (!trace_init_backends()) {
593 trace_init_file(trace_file);
594 qemu_set_log(LOG_TRACE);
596 /* initialize commands */
597 qemuio_add_command(&quit_cmd);
598 qemuio_add_command(&open_cmd);
599 qemuio_add_command(&close_cmd);
601 if (isatty(STDIN_FILENO)) {
602 readline_state = readline_init(readline_printf_func,
605 readline_completion_func);
606 qemu_set_tty_echo(STDIN_FILENO, false);
607 atexit(reenable_tty_echo);
610 /* open the device */
612 flags |= BDRV_O_RDWR;
615 if ((argc - optind) == 1) {
617 QemuOpts *qopts = NULL;
618 qopts = qemu_opts_parse_noisily(&file_opts, argv[optind], false);
622 opts = qemu_opts_to_qdict(qopts, NULL);
623 if (openfile(NULL, flags, writethrough, force_share, opts)) {
629 qdict_put_str(opts, "driver", format);
631 if (openfile(argv[optind], flags, writethrough,
632 force_share, opts)) {
640 * Make sure all outstanding requests complete before the program exits.
644 blk_unref(qemuio_blk);
645 g_free(readline_state);