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.
11 #include <sys/types.h>
18 #include "qemu/main-loop.h"
19 #include "block/block_int.h"
20 #include "trace/control.h"
22 #define CMD_NOFILE_OK 0x01
26 BlockDriverState *qemuio_bs;
27 extern int qemuio_misalign;
29 /* qemu-io commands passed using -c */
31 static char **cmdline;
33 static int close_f(BlockDriverState *bs, int argc, char **argv)
40 static const cmdinfo_t close_cmd = {
44 .oneline = "close the current open file",
47 static int openfile(char *name, int flags, int growable)
50 fprintf(stderr, "file open already, try 'help close'\n");
55 if (bdrv_file_open(&qemuio_bs, name, NULL, flags)) {
56 fprintf(stderr, "%s: can't open device %s\n", progname, name);
60 qemuio_bs = bdrv_new("hda");
62 if (bdrv_open(qemuio_bs, name, NULL, flags, NULL) < 0) {
63 fprintf(stderr, "%s: can't open device %s\n", progname, name);
64 bdrv_delete(qemuio_bs);
73 static void open_help(void)
77 " opens a new file in the requested mode\n"
80 " 'open -Cn /tmp/data' - creates/opens data file read-write and uncached\n"
82 " Opens a file for subsequent use by all of the other qemu-io commands.\n"
83 " -r, -- open file read-only\n"
84 " -s, -- use snapshot file\n"
85 " -n, -- disable host cache\n"
86 " -g, -- allow file to grow (only applies to protocols)"
90 static int open_f(BlockDriverState *bs, int argc, char **argv);
92 static const cmdinfo_t open_cmd = {
98 .flags = CMD_NOFILE_OK,
99 .args = "[-Crsn] [path]",
100 .oneline = "open the file specified by path",
104 static int open_f(BlockDriverState *bs, int argc, char **argv)
111 while ((c = getopt(argc, argv, "snrg")) != EOF) {
114 flags |= BDRV_O_SNAPSHOT;
117 flags |= BDRV_O_NOCACHE | BDRV_O_CACHE_WB;
126 return qemuio_command_usage(&open_cmd);
131 flags |= BDRV_O_RDWR;
134 if (optind != argc - 1) {
135 return qemuio_command_usage(&open_cmd);
138 return openfile(argv[optind], flags, growable);
141 static int quit_f(BlockDriverState *bs, int argc, char **argv)
146 static const cmdinfo_t quit_cmd = {
152 .flags = CMD_FLAG_GLOBAL,
153 .oneline = "exit the program",
156 static void usage(const char *name)
159 "Usage: %s [-h] [-V] [-rsnm] [-c cmd] ... [file]\n"
160 "QEMU Disk exerciser\n"
162 " -c, --cmd command to execute\n"
163 " -r, --read-only export read-only\n"
164 " -s, --snapshot use snapshot file\n"
165 " -n, --nocache disable host cache\n"
166 " -g, --growable allow file to grow (only applies to protocols)\n"
167 " -m, --misalign misalign allocations for O_DIRECT\n"
168 " -k, --native-aio use kernel AIO implementation (on Linux only)\n"
169 " -t, --cache=MODE use the given cache mode for the image\n"
170 " -T, --trace FILE enable trace events listed in the given file\n"
171 " -h, --help display this help and exit\n"
172 " -V, --version output version information and exit\n"
178 #if defined(ENABLE_READLINE)
179 # include <readline/history.h>
180 # include <readline/readline.h>
181 #elif defined(ENABLE_EDITLINE)
182 # include <histedit.h>
185 static char *get_prompt(void)
187 static char prompt[FILENAME_MAX + 2 /*"> "*/ + 1 /*"\0"*/ ];
190 snprintf(prompt, sizeof(prompt), "%s> ", progname);
196 #if defined(ENABLE_READLINE)
197 static char *fetchline(void)
199 char *line = readline(get_prompt());
205 #elif defined(ENABLE_EDITLINE)
206 static char *el_get_prompt(EditLine *e)
211 static char *fetchline(void)
214 static History *hist;
220 hist = history_init();
221 history(hist, &hevent, H_SETSIZE, 100);
222 el = el_init(progname, stdin, stdout, stderr);
224 el_set(el, EL_SIGNAL, 1);
225 el_set(el, EL_PROMPT, el_get_prompt);
226 el_set(el, EL_HIST, history, (const char *)hist);
228 line = strdup(el_gets(el, &count));
231 line[count-1] = '\0';
234 history(hist, &hevent, H_ENTER, line);
240 # define MAXREADLINESZ 1024
241 static char *fetchline(void)
243 char *p, *line = g_malloc(MAXREADLINESZ);
245 if (!fgets(line, MAXREADLINESZ, stdin)) {
250 p = line + strlen(line);
251 if (p != line && p[-1] == '\n') {
259 static void prep_fetchline(void *opaque)
261 int *fetchable = opaque;
263 qemu_set_fd_handler(STDIN_FILENO, NULL, NULL, NULL);
267 static void command_loop(void)
269 int i, done = 0, fetchable = 0, prompted = 0;
272 for (i = 0; !done && i < ncmdline; i++) {
273 done = qemuio_command(qemuio_bs, cmdline[i]);
282 printf("%s", get_prompt());
284 qemu_set_fd_handler(STDIN_FILENO, prep_fetchline, NULL, &fetchable);
288 main_loop_wait(false);
298 done = qemuio_command(qemuio_bs, input);
304 qemu_set_fd_handler(STDIN_FILENO, NULL, NULL, NULL);
307 static void add_user_command(char *optarg)
309 cmdline = g_realloc(cmdline, ++ncmdline * sizeof(char *));
310 cmdline[ncmdline-1] = optarg;
313 int main(int argc, char **argv)
317 const char *sopt = "hVc:d:rsnmgkt:T:";
318 const struct option lopt[] = {
319 { "help", 0, NULL, 'h' },
320 { "version", 0, NULL, 'V' },
321 { "offset", 1, NULL, 'o' },
322 { "cmd", 1, NULL, 'c' },
323 { "read-only", 0, NULL, 'r' },
324 { "snapshot", 0, NULL, 's' },
325 { "nocache", 0, NULL, 'n' },
326 { "misalign", 0, NULL, 'm' },
327 { "growable", 0, NULL, 'g' },
328 { "native-aio", 0, NULL, 'k' },
329 { "discard", 1, NULL, 'd' },
330 { "cache", 1, NULL, 't' },
331 { "trace", 1, NULL, 'T' },
336 int flags = BDRV_O_UNMAP;
338 progname = basename(argv[0]);
340 while ((c = getopt_long(argc, argv, sopt, lopt, &opt_index)) != -1) {
343 flags |= BDRV_O_SNAPSHOT;
346 flags |= BDRV_O_NOCACHE | BDRV_O_CACHE_WB;
349 if (bdrv_parse_discard_flags(optarg, &flags) < 0) {
350 error_report("Invalid discard option: %s", optarg);
355 add_user_command(optarg);
367 flags |= BDRV_O_NATIVE_AIO;
370 if (bdrv_parse_cache_flags(optarg, &flags) < 0) {
371 error_report("Invalid cache option: %s", optarg);
376 if (!trace_backend_init(optarg, NULL)) {
377 exit(1); /* error message will have been printed */
381 printf("%s version %s\n", progname, QEMU_VERSION);
392 if ((argc - optind) > 1) {
397 qemu_init_main_loop();
400 /* initialize commands */
401 qemuio_add_command(&quit_cmd);
402 qemuio_add_command(&open_cmd);
403 qemuio_add_command(&close_cmd);
405 /* open the device */
407 flags |= BDRV_O_RDWR;
410 if ((argc - optind) == 1) {
411 openfile(argv[optind], flags, growable);
416 * Make sure all outstanding requests complete before the program exits.
421 bdrv_delete(qemuio_bs);