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 "sysemu/block-backend.h"
22 #include "block/block_int.h"
23 #include "trace/control.h"
25 #define CMD_NOFILE_OK 0x01
27 static char *progname;
29 static BlockBackend *qemuio_blk;
31 /* qemu-io commands passed using -c */
33 static char **cmdline;
35 static ReadLineState *readline_state;
37 static int close_f(BlockBackend *blk, int argc, char **argv)
39 blk_unref(qemuio_blk);
44 static const cmdinfo_t close_cmd = {
48 .oneline = "close the current open file",
51 static int openfile(char *name, int flags, QDict *opts)
53 Error *local_err = NULL;
57 error_report("file open already, try 'help close'");
62 qemuio_blk = blk_new_open("hda", name, NULL, opts, flags, &local_err);
64 error_reportf_err(local_err, "can't open%s%s: ",
65 name ? " device " : "", name ?: "");
69 bs = blk_bs(qemuio_blk);
70 if (bdrv_is_encrypted(bs)) {
72 printf("Disk image '%s' is encrypted.\n", name);
73 if (qemu_read_password(password, sizeof(password)) < 0) {
74 error_report("No password given");
77 if (bdrv_set_key(bs, password) < 0) {
78 error_report("invalid password");
87 blk_unref(qemuio_blk);
92 static void open_help(void)
96 " opens a new file in the requested mode\n"
99 " 'open -Cn /tmp/data' - creates/opens data file read-write and uncached\n"
101 " Opens a file for subsequent use by all of the other qemu-io commands.\n"
102 " -r, -- open file read-only\n"
103 " -s, -- use snapshot file\n"
104 " -n, -- disable host cache\n"
105 " -o, -- options to be given to the block driver"
109 static int open_f(BlockBackend *blk, int argc, char **argv);
111 static const cmdinfo_t open_cmd = {
117 .flags = CMD_NOFILE_OK,
118 .args = "[-Crsn] [-o options] [path]",
119 .oneline = "open the file specified by path",
123 static QemuOptsList empty_opts = {
126 .head = QTAILQ_HEAD_INITIALIZER(empty_opts.head),
128 /* no elements => accept any params */
129 { /* end of list */ }
133 static int open_f(BlockBackend *blk, int argc, char **argv)
141 while ((c = getopt(argc, argv, "snrgo:")) != -1) {
144 flags |= BDRV_O_SNAPSHOT;
147 flags |= BDRV_O_NOCACHE | BDRV_O_CACHE_WB;
153 if (!qemu_opts_parse_noisily(&empty_opts, optarg, false)) {
154 qemu_opts_reset(&empty_opts);
159 qemu_opts_reset(&empty_opts);
160 return qemuio_command_usage(&open_cmd);
165 flags |= BDRV_O_RDWR;
168 qopts = qemu_opts_find(&empty_opts, NULL);
169 opts = qopts ? qemu_opts_to_qdict(qopts, NULL) : NULL;
170 qemu_opts_reset(&empty_opts);
172 if (optind == argc - 1) {
173 return openfile(argv[optind], flags, opts);
174 } else if (optind == argc) {
175 return openfile(NULL, flags, opts);
178 return qemuio_command_usage(&open_cmd);
182 static int quit_f(BlockBackend *blk, int argc, char **argv)
187 static const cmdinfo_t quit_cmd = {
193 .flags = CMD_FLAG_GLOBAL,
194 .oneline = "exit the program",
197 static void usage(const char *name)
200 "Usage: %s [-h] [-V] [-rsnm] [-f FMT] [-c STRING] ... [file]\n"
201 "QEMU Disk exerciser\n"
203 " -c, --cmd STRING execute command with its arguments\n"
204 " from the given string\n"
205 " -f, --format FMT specifies the block driver to use\n"
206 " -r, --read-only export read-only\n"
207 " -s, --snapshot use snapshot file\n"
208 " -n, --nocache disable host cache\n"
209 " -m, --misalign misalign allocations for O_DIRECT\n"
210 " -k, --native-aio use kernel AIO implementation (on Linux only)\n"
211 " -t, --cache=MODE use the given cache mode for the image\n"
212 " -T, --trace FILE enable trace events listed in the given file\n"
213 " -h, --help display this help and exit\n"
214 " -V, --version output version information and exit\n"
216 "See '%s -c help' for information on available commands."
221 static char *get_prompt(void)
223 static char prompt[FILENAME_MAX + 2 /*"> "*/ + 1 /*"\0"*/ ];
226 snprintf(prompt, sizeof(prompt), "%s> ", progname);
232 static void GCC_FMT_ATTR(2, 3) readline_printf_func(void *opaque,
233 const char *fmt, ...)
241 static void readline_flush_func(void *opaque)
246 static void readline_func(void *opaque, const char *str, void *readline_opaque)
248 char **line = readline_opaque;
249 *line = g_strdup(str);
252 static void completion_match(const char *cmd, void *opaque)
254 readline_add_completion(readline_state, cmd);
257 static void readline_completion_func(void *opaque, const char *str)
259 readline_set_completion_index(readline_state, strlen(str));
260 qemuio_complete_command(str, completion_match, NULL);
263 static char *fetchline_readline(void)
267 readline_start(readline_state, get_prompt(), 0, readline_func, &line);
273 readline_handle_byte(readline_state, ch);
278 #define MAXREADLINESZ 1024
279 static char *fetchline_fgets(void)
281 char *p, *line = g_malloc(MAXREADLINESZ);
283 if (!fgets(line, MAXREADLINESZ, stdin)) {
288 p = line + strlen(line);
289 if (p != line && p[-1] == '\n') {
296 static char *fetchline(void)
298 if (readline_state) {
299 return fetchline_readline();
301 return fetchline_fgets();
305 static void prep_fetchline(void *opaque)
307 int *fetchable = opaque;
309 qemu_set_fd_handler(STDIN_FILENO, NULL, NULL, NULL);
313 static void command_loop(void)
315 int i, done = 0, fetchable = 0, prompted = 0;
318 for (i = 0; !done && i < ncmdline; i++) {
319 done = qemuio_command(qemuio_blk, cmdline[i]);
328 printf("%s", get_prompt());
330 qemu_set_fd_handler(STDIN_FILENO, prep_fetchline, NULL, &fetchable);
334 main_loop_wait(false);
344 done = qemuio_command(qemuio_blk, input);
350 qemu_set_fd_handler(STDIN_FILENO, NULL, NULL, NULL);
353 static void add_user_command(char *optarg)
355 cmdline = g_renew(char *, cmdline, ++ncmdline);
356 cmdline[ncmdline-1] = optarg;
359 static void reenable_tty_echo(void)
361 qemu_set_tty_echo(STDIN_FILENO, true);
364 int main(int argc, char **argv)
367 const char *sopt = "hVc:d:f:rsnmgkt:T:";
368 const struct option lopt[] = {
369 { "help", 0, NULL, 'h' },
370 { "version", 0, NULL, 'V' },
371 { "offset", 1, NULL, 'o' },
372 { "cmd", 1, NULL, 'c' },
373 { "format", 1, NULL, 'f' },
374 { "read-only", 0, NULL, 'r' },
375 { "snapshot", 0, NULL, 's' },
376 { "nocache", 0, NULL, 'n' },
377 { "misalign", 0, NULL, 'm' },
378 { "native-aio", 0, NULL, 'k' },
379 { "discard", 1, NULL, 'd' },
380 { "cache", 1, NULL, 't' },
381 { "trace", 1, NULL, 'T' },
386 int flags = BDRV_O_UNMAP;
387 Error *local_error = NULL;
391 signal(SIGPIPE, SIG_IGN);
394 progname = basename(argv[0]);
395 qemu_init_exec_dir(argv[0]);
399 while ((c = getopt_long(argc, argv, sopt, lopt, &opt_index)) != -1) {
402 flags |= BDRV_O_SNAPSHOT;
405 flags |= BDRV_O_NOCACHE | BDRV_O_CACHE_WB;
408 if (bdrv_parse_discard_flags(optarg, &flags) < 0) {
409 error_report("Invalid discard option: %s", optarg);
417 qdict_put(opts, "driver", qstring_from_str(optarg));
420 add_user_command(optarg);
426 qemuio_misalign = true;
429 flags |= BDRV_O_NATIVE_AIO;
432 if (bdrv_parse_cache_flags(optarg, &flags) < 0) {
433 error_report("Invalid cache option: %s", optarg);
438 if (!trace_init_backends(optarg)) {
439 exit(1); /* error message will have been printed */
443 printf("%s version %s\n", progname, QEMU_VERSION);
454 if ((argc - optind) > 1) {
459 if (qemu_init_main_loop(&local_error)) {
460 error_report_err(local_error);
464 /* initialize commands */
465 qemuio_add_command(&quit_cmd);
466 qemuio_add_command(&open_cmd);
467 qemuio_add_command(&close_cmd);
469 if (isatty(STDIN_FILENO)) {
470 readline_state = readline_init(readline_printf_func,
473 readline_completion_func);
474 qemu_set_tty_echo(STDIN_FILENO, false);
475 atexit(reenable_tty_echo);
478 /* open the device */
480 flags |= BDRV_O_RDWR;
483 if ((argc - optind) == 1) {
484 openfile(argv[optind], flags, opts);
489 * Make sure all outstanding requests complete before the program exits.
493 blk_unref(qemuio_blk);
494 g_free(readline_state);