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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-common.h" | |
18 | #include "qemu/main-loop.h" | |
19 | #include "block/block_int.h" | |
20 | #include "cmd.h" | |
21 | #include "trace/control.h" | |
22 | ||
23 | #define VERSION "0.0.1" | |
24 | ||
25 | #define CMD_NOFILE_OK 0x01 | |
26 | ||
27 | char *progname; | |
28 | ||
29 | BlockDriverState *qemuio_bs; | |
30 | extern int qemuio_misalign; | |
31 | ||
32 | static int close_f(BlockDriverState *bs, int argc, char **argv) | |
33 | { | |
34 | bdrv_delete(bs); | |
35 | qemuio_bs = NULL; | |
36 | return 0; | |
37 | } | |
38 | ||
39 | static const cmdinfo_t close_cmd = { | |
40 | .name = "close", | |
41 | .altname = "c", | |
42 | .cfunc = close_f, | |
43 | .oneline = "close the current open file", | |
44 | }; | |
45 | ||
46 | static int openfile(char *name, int flags, int growable) | |
47 | { | |
48 | if (qemuio_bs) { | |
49 | fprintf(stderr, "file open already, try 'help close'\n"); | |
50 | return 1; | |
51 | } | |
52 | ||
53 | if (growable) { | |
54 | if (bdrv_file_open(&qemuio_bs, name, NULL, flags)) { | |
55 | fprintf(stderr, "%s: can't open device %s\n", progname, name); | |
56 | return 1; | |
57 | } | |
58 | } else { | |
59 | qemuio_bs = bdrv_new("hda"); | |
60 | ||
61 | if (bdrv_open(qemuio_bs, name, NULL, flags, NULL) < 0) { | |
62 | fprintf(stderr, "%s: can't open device %s\n", progname, name); | |
63 | bdrv_delete(qemuio_bs); | |
64 | qemuio_bs = NULL; | |
65 | return 1; | |
66 | } | |
67 | } | |
68 | ||
69 | return 0; | |
70 | } | |
71 | ||
72 | static void open_help(void) | |
73 | { | |
74 | printf( | |
75 | "\n" | |
76 | " opens a new file in the requested mode\n" | |
77 | "\n" | |
78 | " Example:\n" | |
79 | " 'open -Cn /tmp/data' - creates/opens data file read-write and uncached\n" | |
80 | "\n" | |
81 | " Opens a file for subsequent use by all of the other qemu-io commands.\n" | |
82 | " -r, -- open file read-only\n" | |
83 | " -s, -- use snapshot file\n" | |
84 | " -n, -- disable host cache\n" | |
85 | " -g, -- allow file to grow (only applies to protocols)" | |
86 | "\n"); | |
87 | } | |
88 | ||
89 | static int open_f(BlockDriverState *bs, int argc, char **argv); | |
90 | ||
91 | static const cmdinfo_t open_cmd = { | |
92 | .name = "open", | |
93 | .altname = "o", | |
94 | .cfunc = open_f, | |
95 | .argmin = 1, | |
96 | .argmax = -1, | |
97 | .flags = CMD_NOFILE_OK, | |
98 | .args = "[-Crsn] [path]", | |
99 | .oneline = "open the file specified by path", | |
100 | .help = open_help, | |
101 | }; | |
102 | ||
103 | static int open_f(BlockDriverState *bs, int argc, char **argv) | |
104 | { | |
105 | int flags = 0; | |
106 | int readonly = 0; | |
107 | int growable = 0; | |
108 | int c; | |
109 | ||
110 | while ((c = getopt(argc, argv, "snrg")) != EOF) { | |
111 | switch (c) { | |
112 | case 's': | |
113 | flags |= BDRV_O_SNAPSHOT; | |
114 | break; | |
115 | case 'n': | |
116 | flags |= BDRV_O_NOCACHE | BDRV_O_CACHE_WB; | |
117 | break; | |
118 | case 'r': | |
119 | readonly = 1; | |
120 | break; | |
121 | case 'g': | |
122 | growable = 1; | |
123 | break; | |
124 | default: | |
125 | return command_usage(&open_cmd); | |
126 | } | |
127 | } | |
128 | ||
129 | if (!readonly) { | |
130 | flags |= BDRV_O_RDWR; | |
131 | } | |
132 | ||
133 | if (optind != argc - 1) { | |
134 | return command_usage(&open_cmd); | |
135 | } | |
136 | ||
137 | return openfile(argv[optind], flags, growable); | |
138 | } | |
139 | ||
140 | static int quit_f(BlockDriverState *bs, int argc, char **argv) | |
141 | { | |
142 | return 1; | |
143 | } | |
144 | ||
145 | static const cmdinfo_t quit_cmd = { | |
146 | .name = "quit", | |
147 | .altname = "q", | |
148 | .cfunc = quit_f, | |
149 | .argmin = -1, | |
150 | .argmax = -1, | |
151 | .flags = CMD_FLAG_GLOBAL, | |
152 | .oneline = "exit the program", | |
153 | }; | |
154 | ||
155 | static void usage(const char *name) | |
156 | { | |
157 | printf( | |
158 | "Usage: %s [-h] [-V] [-rsnm] [-c cmd] ... [file]\n" | |
159 | "QEMU Disk exerciser\n" | |
160 | "\n" | |
161 | " -c, --cmd command to execute\n" | |
162 | " -r, --read-only export read-only\n" | |
163 | " -s, --snapshot use snapshot file\n" | |
164 | " -n, --nocache disable host cache\n" | |
165 | " -g, --growable allow file to grow (only applies to protocols)\n" | |
166 | " -m, --misalign misalign allocations for O_DIRECT\n" | |
167 | " -k, --native-aio use kernel AIO implementation (on Linux only)\n" | |
168 | " -t, --cache=MODE use the given cache mode for the image\n" | |
169 | " -T, --trace FILE enable trace events listed in the given file\n" | |
170 | " -h, --help display this help and exit\n" | |
171 | " -V, --version output version information and exit\n" | |
172 | "\n", | |
173 | name); | |
174 | } | |
175 | ||
176 | ||
177 | int main(int argc, char **argv) | |
178 | { | |
179 | int readonly = 0; | |
180 | int growable = 0; | |
181 | const char *sopt = "hVc:d:rsnmgkt:T:"; | |
182 | const struct option lopt[] = { | |
183 | { "help", 0, NULL, 'h' }, | |
184 | { "version", 0, NULL, 'V' }, | |
185 | { "offset", 1, NULL, 'o' }, | |
186 | { "cmd", 1, NULL, 'c' }, | |
187 | { "read-only", 0, NULL, 'r' }, | |
188 | { "snapshot", 0, NULL, 's' }, | |
189 | { "nocache", 0, NULL, 'n' }, | |
190 | { "misalign", 0, NULL, 'm' }, | |
191 | { "growable", 0, NULL, 'g' }, | |
192 | { "native-aio", 0, NULL, 'k' }, | |
193 | { "discard", 1, NULL, 'd' }, | |
194 | { "cache", 1, NULL, 't' }, | |
195 | { "trace", 1, NULL, 'T' }, | |
196 | { NULL, 0, NULL, 0 } | |
197 | }; | |
198 | int c; | |
199 | int opt_index = 0; | |
200 | int flags = BDRV_O_UNMAP; | |
201 | ||
202 | progname = basename(argv[0]); | |
203 | ||
204 | while ((c = getopt_long(argc, argv, sopt, lopt, &opt_index)) != -1) { | |
205 | switch (c) { | |
206 | case 's': | |
207 | flags |= BDRV_O_SNAPSHOT; | |
208 | break; | |
209 | case 'n': | |
210 | flags |= BDRV_O_NOCACHE | BDRV_O_CACHE_WB; | |
211 | break; | |
212 | case 'd': | |
213 | if (bdrv_parse_discard_flags(optarg, &flags) < 0) { | |
214 | error_report("Invalid discard option: %s", optarg); | |
215 | exit(1); | |
216 | } | |
217 | break; | |
218 | case 'c': | |
219 | add_user_command(optarg); | |
220 | break; | |
221 | case 'r': | |
222 | readonly = 1; | |
223 | break; | |
224 | case 'm': | |
225 | qemuio_misalign = 1; | |
226 | break; | |
227 | case 'g': | |
228 | growable = 1; | |
229 | break; | |
230 | case 'k': | |
231 | flags |= BDRV_O_NATIVE_AIO; | |
232 | break; | |
233 | case 't': | |
234 | if (bdrv_parse_cache_flags(optarg, &flags) < 0) { | |
235 | error_report("Invalid cache option: %s", optarg); | |
236 | exit(1); | |
237 | } | |
238 | break; | |
239 | case 'T': | |
240 | if (!trace_backend_init(optarg, NULL)) { | |
241 | exit(1); /* error message will have been printed */ | |
242 | } | |
243 | break; | |
244 | case 'V': | |
245 | printf("%s version %s\n", progname, VERSION); | |
246 | exit(0); | |
247 | case 'h': | |
248 | usage(progname); | |
249 | exit(0); | |
250 | default: | |
251 | usage(progname); | |
252 | exit(1); | |
253 | } | |
254 | } | |
255 | ||
256 | if ((argc - optind) > 1) { | |
257 | usage(progname); | |
258 | exit(1); | |
259 | } | |
260 | ||
261 | qemu_init_main_loop(); | |
262 | bdrv_init(); | |
263 | ||
264 | /* initialize commands */ | |
265 | add_command(&quit_cmd); | |
266 | add_command(&open_cmd); | |
267 | add_command(&close_cmd); | |
268 | ||
269 | /* open the device */ | |
270 | if (!readonly) { | |
271 | flags |= BDRV_O_RDWR; | |
272 | } | |
273 | ||
274 | if ((argc - optind) == 1) { | |
275 | openfile(argv[optind], flags, growable); | |
276 | } | |
277 | command_loop(); | |
278 | ||
279 | /* | |
280 | * Make sure all outstanding requests complete before the program exits. | |
281 | */ | |
282 | bdrv_drain_all(); | |
283 | ||
284 | if (qemuio_bs) { | |
285 | bdrv_delete(qemuio_bs); | |
286 | } | |
287 | return 0; | |
288 | } |