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10#include <sys/time.h>
11#include <sys/types.h>
12#include <stdarg.h>
13#include <stdio.h>
14#include <getopt.h>
15#include <libgen.h>
16
17#include "qemu-io.h"
18#include "qemu/main-loop.h"
19#include "block/block_int.h"
20#include "trace/control.h"
21
22#define CMD_NOFILE_OK 0x01
23
24char *progname;
25
26BlockDriverState *qemuio_bs;
27extern int qemuio_misalign;
28
29
30static int ncmdline;
31static char **cmdline;
32
33static int close_f(BlockDriverState *bs, int argc, char **argv)
34{
35 bdrv_delete(bs);
36 qemuio_bs = NULL;
37 return 0;
38}
39
40static const cmdinfo_t close_cmd = {
41 .name = "close",
42 .altname = "c",
43 .cfunc = close_f,
44 .oneline = "close the current open file",
45};
46
47static int openfile(char *name, int flags, int growable)
48{
49 if (qemuio_bs) {
50 fprintf(stderr, "file open already, try 'help close'\n");
51 return 1;
52 }
53
54 if (growable) {
55 if (bdrv_file_open(&qemuio_bs, name, NULL, flags)) {
56 fprintf(stderr, "%s: can't open device %s\n", progname, name);
57 return 1;
58 }
59 } else {
60 qemuio_bs = bdrv_new("hda");
61
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);
65 qemuio_bs = NULL;
66 return 1;
67 }
68 }
69
70 return 0;
71}
72
73static void open_help(void)
74{
75 printf(
76"\n"
77" opens a new file in the requested mode\n"
78"\n"
79" Example:\n"
80" 'open -Cn /tmp/data' - creates/opens data file read-write and uncached\n"
81"\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)"
87"\n");
88}
89
90static int open_f(BlockDriverState *bs, int argc, char **argv);
91
92static const cmdinfo_t open_cmd = {
93 .name = "open",
94 .altname = "o",
95 .cfunc = open_f,
96 .argmin = 1,
97 .argmax = -1,
98 .flags = CMD_NOFILE_OK,
99 .args = "[-Crsn] [path]",
100 .oneline = "open the file specified by path",
101 .help = open_help,
102};
103
104static int open_f(BlockDriverState *bs, int argc, char **argv)
105{
106 int flags = 0;
107 int readonly = 0;
108 int growable = 0;
109 int c;
110
111 while ((c = getopt(argc, argv, "snrg")) != EOF) {
112 switch (c) {
113 case 's':
114 flags |= BDRV_O_SNAPSHOT;
115 break;
116 case 'n':
117 flags |= BDRV_O_NOCACHE | BDRV_O_CACHE_WB;
118 break;
119 case 'r':
120 readonly = 1;
121 break;
122 case 'g':
123 growable = 1;
124 break;
125 default:
126 return qemuio_command_usage(&open_cmd);
127 }
128 }
129
130 if (!readonly) {
131 flags |= BDRV_O_RDWR;
132 }
133
134 if (optind != argc - 1) {
135 return qemuio_command_usage(&open_cmd);
136 }
137
138 return openfile(argv[optind], flags, growable);
139}
140
141static int quit_f(BlockDriverState *bs, int argc, char **argv)
142{
143 return 1;
144}
145
146static const cmdinfo_t quit_cmd = {
147 .name = "quit",
148 .altname = "q",
149 .cfunc = quit_f,
150 .argmin = -1,
151 .argmax = -1,
152 .flags = CMD_FLAG_GLOBAL,
153 .oneline = "exit the program",
154};
155
156static void usage(const char *name)
157{
158 printf(
159"Usage: %s [-h] [-V] [-rsnm] [-c cmd] ... [file]\n"
160"QEMU Disk exerciser\n"
161"\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"
173"\n",
174 name);
175}
176
177
178#if defined(ENABLE_READLINE)
179# include <readline/history.h>
180# include <readline/readline.h>
181#elif defined(ENABLE_EDITLINE)
182# include <histedit.h>
183#endif
184
185static char *get_prompt(void)
186{
187 static char prompt[FILENAME_MAX + 2 + 1 ];
188
189 if (!prompt[0]) {
190 snprintf(prompt, sizeof(prompt), "%s> ", progname);
191 }
192
193 return prompt;
194}
195
196#if defined(ENABLE_READLINE)
197static char *fetchline(void)
198{
199 char *line = readline(get_prompt());
200 if (line && *line) {
201 add_history(line);
202 }
203 return line;
204}
205#elif defined(ENABLE_EDITLINE)
206static char *el_get_prompt(EditLine *e)
207{
208 return get_prompt();
209}
210
211static char *fetchline(void)
212{
213 static EditLine *el;
214 static History *hist;
215 HistEvent hevent;
216 char *line;
217 int count;
218
219 if (!el) {
220 hist = history_init();
221 history(hist, &hevent, H_SETSIZE, 100);
222 el = el_init(progname, stdin, stdout, stderr);
223 el_source(el, NULL);
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);
227 }
228 line = strdup(el_gets(el, &count));
229 if (line) {
230 if (count > 0) {
231 line[count-1] = '\0';
232 }
233 if (*line) {
234 history(hist, &hevent, H_ENTER, line);
235 }
236 }
237 return line;
238}
239#else
240# define MAXREADLINESZ 1024
241static char *fetchline(void)
242{
243 char *p, *line = g_malloc(MAXREADLINESZ);
244
245 if (!fgets(line, MAXREADLINESZ, stdin)) {
246 g_free(line);
247 return NULL;
248 }
249
250 p = line + strlen(line);
251 if (p != line && p[-1] == '\n') {
252 p[-1] = '\0';
253 }
254
255 return line;
256}
257#endif
258
259static void prep_fetchline(void *opaque)
260{
261 int *fetchable = opaque;
262
263 qemu_set_fd_handler(STDIN_FILENO, NULL, NULL, NULL);
264 *fetchable= 1;
265}
266
267static void command_loop(void)
268{
269 int i, done = 0, fetchable = 0, prompted = 0;
270 char *input;
271
272 for (i = 0; !done && i < ncmdline; i++) {
273 done = qemuio_command(qemuio_bs, cmdline[i]);
274 }
275 if (cmdline) {
276 g_free(cmdline);
277 return;
278 }
279
280 while (!done) {
281 if (!prompted) {
282 printf("%s", get_prompt());
283 fflush(stdout);
284 qemu_set_fd_handler(STDIN_FILENO, prep_fetchline, NULL, &fetchable);
285 prompted = 1;
286 }
287
288 main_loop_wait(false);
289
290 if (!fetchable) {
291 continue;
292 }
293
294 input = fetchline();
295 if (input == NULL) {
296 break;
297 }
298 done = qemuio_command(qemuio_bs, input);
299 g_free(input);
300
301 prompted = 0;
302 fetchable = 0;
303 }
304 qemu_set_fd_handler(STDIN_FILENO, NULL, NULL, NULL);
305}
306
307static void add_user_command(char *optarg)
308{
309 cmdline = g_realloc(cmdline, ++ncmdline * sizeof(char *));
310 cmdline[ncmdline-1] = optarg;
311}
312
313int main(int argc, char **argv)
314{
315 int readonly = 0;
316 int growable = 0;
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' },
332 { NULL, 0, NULL, 0 }
333 };
334 int c;
335 int opt_index = 0;
336 int flags = BDRV_O_UNMAP;
337
338#ifdef CONFIG_POSIX
339 signal(SIGPIPE, SIG_IGN);
340#endif
341
342 progname = basename(argv[0]);
343
344 while ((c = getopt_long(argc, argv, sopt, lopt, &opt_index)) != -1) {
345 switch (c) {
346 case 's':
347 flags |= BDRV_O_SNAPSHOT;
348 break;
349 case 'n':
350 flags |= BDRV_O_NOCACHE | BDRV_O_CACHE_WB;
351 break;
352 case 'd':
353 if (bdrv_parse_discard_flags(optarg, &flags) < 0) {
354 error_report("Invalid discard option: %s", optarg);
355 exit(1);
356 }
357 break;
358 case 'c':
359 add_user_command(optarg);
360 break;
361 case 'r':
362 readonly = 1;
363 break;
364 case 'm':
365 qemuio_misalign = 1;
366 break;
367 case 'g':
368 growable = 1;
369 break;
370 case 'k':
371 flags |= BDRV_O_NATIVE_AIO;
372 break;
373 case 't':
374 if (bdrv_parse_cache_flags(optarg, &flags) < 0) {
375 error_report("Invalid cache option: %s", optarg);
376 exit(1);
377 }
378 break;
379 case 'T':
380 if (!trace_backend_init(optarg, NULL)) {
381 exit(1);
382 }
383 break;
384 case 'V':
385 printf("%s version %s\n", progname, QEMU_VERSION);
386 exit(0);
387 case 'h':
388 usage(progname);
389 exit(0);
390 default:
391 usage(progname);
392 exit(1);
393 }
394 }
395
396 if ((argc - optind) > 1) {
397 usage(progname);
398 exit(1);
399 }
400
401 qemu_init_main_loop();
402 bdrv_init();
403
404
405 qemuio_add_command(&quit_cmd);
406 qemuio_add_command(&open_cmd);
407 qemuio_add_command(&close_cmd);
408
409
410 if (!readonly) {
411 flags |= BDRV_O_RDWR;
412 }
413
414 if ((argc - optind) == 1) {
415 openfile(argv[optind], flags, growable);
416 }
417 command_loop();
418
419
420
421
422 bdrv_drain_all();
423
424 if (qemuio_bs) {
425 bdrv_delete(qemuio_bs);
426 }
427 return 0;
428}
429
