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1 | /* | |
2 | * Command line utility to exercise the QEMU I/O path. | |
3 | * | |
4 | * Copyright (C) 2009 Red Hat, Inc. | |
5 | * Copyright (c) 2003-2005 Silicon Graphics, Inc. | |
6 | * | |
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. | |
9 | */ | |
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 | ||
24 | char *progname; | |
25 | ||
26 | BlockDriverState *qemuio_bs; | |
27 | extern int qemuio_misalign; | |
28 | ||
29 | /* qemu-io commands passed using -c */ | |
30 | static int ncmdline; | |
31 | static char **cmdline; | |
32 | ||
33 | static int close_f(BlockDriverState *bs, int argc, char **argv) | |
34 | { | |
35 | bdrv_delete(bs); | |
36 | qemuio_bs = NULL; | |
37 | return 0; | |
38 | } | |
39 | ||
40 | static const cmdinfo_t close_cmd = { | |
41 | .name = "close", | |
42 | .altname = "c", | |
43 | .cfunc = close_f, | |
44 | .oneline = "close the current open file", | |
45 | }; | |
46 | ||
47 | static 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 | ||
73 | static 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 | ||
90 | static int open_f(BlockDriverState *bs, int argc, char **argv); | |
91 | ||
92 | static 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 | ||
104 | static 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 | ||
141 | static int quit_f(BlockDriverState *bs, int argc, char **argv) | |
142 | { | |
143 | return 1; | |
144 | } | |
145 | ||
146 | static 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 | ||
156 | static 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 | ||
185 | static char *get_prompt(void) | |
186 | { | |
187 | static char prompt[FILENAME_MAX + 2 /*"> "*/ + 1 /*"\0"*/ ]; | |
188 | ||
189 | if (!prompt[0]) { | |
190 | snprintf(prompt, sizeof(prompt), "%s> ", progname); | |
191 | } | |
192 | ||
193 | return prompt; | |
194 | } | |
195 | ||
196 | #if defined(ENABLE_READLINE) | |
197 | static 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) | |
206 | static char *el_get_prompt(EditLine *e) | |
207 | { | |
208 | return get_prompt(); | |
209 | } | |
210 | ||
211 | static 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 | |
241 | static 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 | ||
259 | static 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 | ||
267 | static 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 | ||
307 | static void add_user_command(char *optarg) | |
308 | { | |
309 | cmdline = g_realloc(cmdline, ++ncmdline * sizeof(char *)); | |
310 | cmdline[ncmdline-1] = optarg; | |
311 | } | |
312 | ||
313 | int 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 | progname = basename(argv[0]); | |
339 | ||
340 | while ((c = getopt_long(argc, argv, sopt, lopt, &opt_index)) != -1) { | |
341 | switch (c) { | |
342 | case 's': | |
343 | flags |= BDRV_O_SNAPSHOT; | |
344 | break; | |
345 | case 'n': | |
346 | flags |= BDRV_O_NOCACHE | BDRV_O_CACHE_WB; | |
347 | break; | |
348 | case 'd': | |
349 | if (bdrv_parse_discard_flags(optarg, &flags) < 0) { | |
350 | error_report("Invalid discard option: %s", optarg); | |
351 | exit(1); | |
352 | } | |
353 | break; | |
354 | case 'c': | |
355 | add_user_command(optarg); | |
356 | break; | |
357 | case 'r': | |
358 | readonly = 1; | |
359 | break; | |
360 | case 'm': | |
361 | qemuio_misalign = 1; | |
362 | break; | |
363 | case 'g': | |
364 | growable = 1; | |
365 | break; | |
366 | case 'k': | |
367 | flags |= BDRV_O_NATIVE_AIO; | |
368 | break; | |
369 | case 't': | |
370 | if (bdrv_parse_cache_flags(optarg, &flags) < 0) { | |
371 | error_report("Invalid cache option: %s", optarg); | |
372 | exit(1); | |
373 | } | |
374 | break; | |
375 | case 'T': | |
376 | if (!trace_backend_init(optarg, NULL)) { | |
377 | exit(1); /* error message will have been printed */ | |
378 | } | |
379 | break; | |
380 | case 'V': | |
381 | printf("%s version %s\n", progname, QEMU_VERSION); | |
382 | exit(0); | |
383 | case 'h': | |
384 | usage(progname); | |
385 | exit(0); | |
386 | default: | |
387 | usage(progname); | |
388 | exit(1); | |
389 | } | |
390 | } | |
391 | ||
392 | if ((argc - optind) > 1) { | |
393 | usage(progname); | |
394 | exit(1); | |
395 | } | |
396 | ||
397 | qemu_init_main_loop(); | |
398 | bdrv_init(); | |
399 | ||
400 | /* initialize commands */ | |
401 | qemuio_add_command(&quit_cmd); | |
402 | qemuio_add_command(&open_cmd); | |
403 | qemuio_add_command(&close_cmd); | |
404 | ||
405 | /* open the device */ | |
406 | if (!readonly) { | |
407 | flags |= BDRV_O_RDWR; | |
408 | } | |
409 | ||
410 | if ((argc - optind) == 1) { | |
411 | openfile(argv[optind], flags, growable); | |
412 | } | |
413 | command_loop(); | |
414 | ||
415 | /* | |
416 | * Make sure all outstanding requests complete before the program exits. | |
417 | */ | |
418 | bdrv_drain_all(); | |
419 | ||
420 | if (qemuio_bs) { | |
421 | bdrv_delete(qemuio_bs); | |
422 | } | |
423 | return 0; | |
424 | } |