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 #if defined(CONFIG_FVD)
248 # include "qemu-io-sim.c"
251 static const cmdinfo_t quit_cmd
= {
257 .flags
= CMD_FLAG_GLOBAL
,
258 .oneline
= "exit the program",
261 static void usage(const char *name
)
264 "Usage: %s [OPTIONS]... [-c STRING]... [file]\n"
265 "QEMU Disk exerciser\n"
267 " --object OBJECTDEF define an object such as 'secret' for\n"
268 " passwords and/or encryption keys\n"
269 " --image-opts treat file as option string\n"
270 " -c, --cmd STRING execute command with its arguments\n"
271 " from the given string\n"
272 " -f, --format FMT specifies the block driver to use\n"
273 " -r, --read-only export read-only\n"
274 " -s, --snapshot use snapshot file\n"
275 " -n, --nocache disable host cache, short for -t none\n"
276 " -m, --misalign misalign allocations for O_DIRECT\n"
277 " -k, --native-aio use kernel AIO implementation (on Linux only)\n"
278 " -t, --cache=MODE use the given cache mode for the image\n"
279 " -d, --discard=MODE use the given discard mode for the image\n"
280 " -T, --trace [[enable=]<pattern>][,events=<file>][,file=<file>]\n"
281 " specify tracing options\n"
282 " see qemu-img(1) man page for full description\n"
283 " -U, --force-share force shared permissions\n"
284 " -h, --help display this help and exit\n"
285 " -V, --version output version information and exit\n"
287 "See '%s -c help' for information on available commands."
292 static char *get_prompt(void)
294 static char prompt
[FILENAME_MAX
+ 2 /*"> "*/ + 1 /*"\0"*/ ];
297 snprintf(prompt
, sizeof(prompt
), "%s> ", progname
);
303 static void GCC_FMT_ATTR(2, 3) readline_printf_func(void *opaque
,
304 const char *fmt
, ...)
312 static void readline_flush_func(void *opaque
)
317 static void readline_func(void *opaque
, const char *str
, void *readline_opaque
)
319 char **line
= readline_opaque
;
320 *line
= g_strdup(str
);
323 static void completion_match(const char *cmd
, void *opaque
)
325 readline_add_completion(readline_state
, cmd
);
328 static void readline_completion_func(void *opaque
, const char *str
)
330 readline_set_completion_index(readline_state
, strlen(str
));
331 qemuio_complete_command(str
, completion_match
, NULL
);
334 static char *fetchline_readline(void)
338 readline_start(readline_state
, get_prompt(), 0, readline_func
, &line
);
344 readline_handle_byte(readline_state
, ch
);
349 #define MAXREADLINESZ 1024
350 static char *fetchline_fgets(void)
352 char *p
, *line
= g_malloc(MAXREADLINESZ
);
354 if (!fgets(line
, MAXREADLINESZ
, stdin
)) {
359 p
= line
+ strlen(line
);
360 if (p
!= line
&& p
[-1] == '\n') {
367 static char *fetchline(void)
369 if (readline_state
) {
370 return fetchline_readline();
372 return fetchline_fgets();
376 static void prep_fetchline(void *opaque
)
378 int *fetchable
= opaque
;
380 qemu_set_fd_handler(STDIN_FILENO
, NULL
, NULL
, NULL
);
384 static void command_loop(void)
386 int i
, done
= 0, fetchable
= 0, prompted
= 0;
389 for (i
= 0; !done
&& i
< ncmdline
; i
++) {
390 done
= qemuio_command(qemuio_blk
, cmdline
[i
]);
399 printf("%s", get_prompt());
401 qemu_set_fd_handler(STDIN_FILENO
, prep_fetchline
, NULL
, &fetchable
);
405 main_loop_wait(false);
415 done
= qemuio_command(qemuio_blk
, input
);
421 qemu_set_fd_handler(STDIN_FILENO
, NULL
, NULL
, NULL
);
424 static void add_user_command(char *optarg
)
426 cmdline
= g_renew(char *, cmdline
, ++ncmdline
);
427 cmdline
[ncmdline
-1] = optarg
;
430 static void reenable_tty_echo(void)
432 qemu_set_tty_echo(STDIN_FILENO
, true);
437 OPTION_IMAGE_OPTS
= 257,
440 static QemuOptsList qemu_object_opts
= {
442 .implied_opt_name
= "qom-type",
443 .head
= QTAILQ_HEAD_INITIALIZER(qemu_object_opts
.head
),
450 static QemuOptsList file_opts
= {
452 .implied_opt_name
= "file",
453 .head
= QTAILQ_HEAD_INITIALIZER(file_opts
.head
),
455 /* no elements => accept any params */
456 { /* end of list */ }
460 int main(int argc
, char **argv
)
463 const char *sopt
= "hVc:d:f:rsnmkt:T:U";
464 const struct option lopt
[] = {
465 { "help", no_argument
, NULL
, 'h' },
466 { "version", no_argument
, NULL
, 'V' },
467 { "cmd", required_argument
, NULL
, 'c' },
468 { "format", required_argument
, NULL
, 'f' },
469 { "read-only", no_argument
, NULL
, 'r' },
470 { "snapshot", no_argument
, NULL
, 's' },
471 { "nocache", no_argument
, NULL
, 'n' },
472 { "misalign", no_argument
, NULL
, 'm' },
473 { "native-aio", no_argument
, NULL
, 'k' },
474 { "discard", required_argument
, NULL
, 'd' },
475 { "cache", required_argument
, NULL
, 't' },
476 { "trace", required_argument
, NULL
, 'T' },
477 { "object", required_argument
, NULL
, OPTION_OBJECT
},
478 { "image-opts", no_argument
, NULL
, OPTION_IMAGE_OPTS
},
479 { "force-share", no_argument
, 0, 'U'},
484 int flags
= BDRV_O_UNMAP
;
485 bool writethrough
= true;
486 Error
*local_error
= NULL
;
488 const char *format
= NULL
;
489 char *trace_file
= NULL
;
490 bool force_share
= false;
493 signal(SIGPIPE
, SIG_IGN
);
496 module_call_init(MODULE_INIT_TRACE
);
497 progname
= basename(argv
[0]);
498 qemu_init_exec_dir(argv
[0]);
500 qcrypto_init(&error_fatal
);
502 module_call_init(MODULE_INIT_QOM
);
503 qemu_add_opts(&qemu_object_opts
);
504 qemu_add_opts(&qemu_trace_opts
);
507 while ((c
= getopt_long(argc
, argv
, sopt
, lopt
, &opt_index
)) != -1) {
510 flags
|= BDRV_O_SNAPSHOT
;
513 flags
|= BDRV_O_NOCACHE
;
514 writethrough
= false;
517 if (bdrv_parse_discard_flags(optarg
, &flags
) < 0) {
518 error_report("Invalid discard option: %s", optarg
);
526 add_user_command(optarg
);
532 qemuio_misalign
= true;
535 flags
|= BDRV_O_NATIVE_AIO
;
538 if (bdrv_parse_cache_mode(optarg
, &flags
, &writethrough
) < 0) {
539 error_report("Invalid cache option: %s", optarg
);
545 trace_file
= trace_opt_parse(optarg
);
548 printf("%s version %s\n", progname
, QEMU_VERSION
);
556 case OPTION_OBJECT
: {
558 qopts
= qemu_opts_parse_noisily(&qemu_object_opts
,
564 case OPTION_IMAGE_OPTS
:
573 if ((argc
- optind
) > 1) {
578 if (format
&& imageOpts
) {
579 error_report("--image-opts and -f are mutually exclusive");
583 if (qemu_init_main_loop(&local_error
)) {
584 error_report_err(local_error
);
588 if (qemu_opts_foreach(&qemu_object_opts
,
589 user_creatable_add_opts_foreach
,
594 if (!trace_init_backends()) {
597 trace_init_file(trace_file
);
598 qemu_set_log(LOG_TRACE
);
600 /* initialize commands */
601 qemuio_add_command(&quit_cmd
);
602 qemuio_add_command(&open_cmd
);
603 qemuio_add_command(&close_cmd
);
605 if (isatty(STDIN_FILENO
)) {
606 readline_state
= readline_init(readline_printf_func
,
609 readline_completion_func
);
610 qemu_set_tty_echo(STDIN_FILENO
, false);
611 atexit(reenable_tty_echo
);
614 /* open the device */
616 flags
|= BDRV_O_RDWR
;
619 if ((argc
- optind
) == 1) {
621 QemuOpts
*qopts
= NULL
;
622 qopts
= qemu_opts_parse_noisily(&file_opts
, argv
[optind
], false);
626 opts
= qemu_opts_to_qdict(qopts
, NULL
);
627 if (openfile(NULL
, flags
, writethrough
, force_share
, opts
)) {
633 qdict_put_str(opts
, "driver", format
);
635 if (openfile(argv
[optind
], flags
, writethrough
,
636 force_share
, opts
)) {
644 * Make sure all outstanding requests complete before the program exits.
648 blk_unref(qemuio_blk
);
649 g_free(readline_state
);