1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
|
// Copyright 2018 Mimecast Ltd.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
/**
* @file main.c
* @author Paul Buetow
*
* @brief The entry point of the I/O Replay program.
*/
#include <signal.h>
#include <fcntl.h>
#include "capture/capture.h"
#include "cleanup/cleanup.h"
#include "generate/generate.h"
#include "init/init.h"
#include "mounts.h"
#include "options.h"
#include "replay/replay.h"
#include "utests.h"
#include "utils/utils.h"
/**
* @brief Do some architecture checks
*
* To ensure that I/O replay works correctly we have to check whether some
* data types are atomic or not. This is what this function does!
*/
static void _arch_check_atomic(void)
{
if (sizeof(int) > sizeof(sig_atomic_t)) {
Error("int data type is not atomic on this architecture: %ld > %ld",
sizeof(int), sizeof(sig_atomic_t));
} else if (sizeof(bool) > sizeof(sig_atomic_t)) {
Error("bool data type is not atomic on this architecture: %ld > %ld",
sizeof(bool), sizeof(sig_atomic_t));
}
}
/**
* @brief Prints out version and copyright information
*/
static void _print_version(void)
{
Put("This is I/O Replay %s - %s", IOREPLAY_VERSION, IOREPLAY_COPYRIGHT);
}
/**
* @brief Print the synopsis
*/
static void _print_synopsis(void)
{
_print_version();
Put("Synopsis:");
Put("\tioreplay -c io.capture [-x PID] [-m MODULE]");
Put("\tioreplay -c io.capture -r io.replay [-n str] [-u str] [-w str]");
Put("\tioreplay -i io.replay");
Put("\tioreplay -r io.replay [-p #] [-t #] [-D] [-s #]");
Put("\tioreplay -R io.replay [-p #] [-t #] [-D] [-s #]");
Put("\tioreplay -d");
Put("\tioreplay -P");
Put("\tioreplay -T [-n NAME]");
Put("\tioreplay -V");
}
/**
* @brief Print a brief help
*/
static void _print_help(void)
{
_print_synopsis();
Put("Help:");
Put("\t-d Drop all Linux/FS caches and exit ioreplay");
Put("\t-D Don't drop all caches (in conjunction with -r/-R):");
Put("\t-s SPEED The speed factor (default: 0 [as fast as possible])");
Put("\t-h Print this help");
Put("\t-c FILE The capture file");
Put("\t-n NAME The name (default: test0)");
Put("\t-u USER The test run user (default: mcuser)");
Put("\t-p #WORKERS Amount of of parallel worker processes (default: 4)");
Put("\t-t #THREADS Threads per worker process (default: 128)");
Put("\t-i REPLAYFILE The replay file to be initialised");
Put("\t-r REPLAYFILE The replay file to be replayed");
Put("\t-R REPLAYFILE Init and replay in one run (-i and -r combined)");
Put("\t-S STATSFILE Write a stats file at the end of a test");
Put("\t-T Trash data directories");
Put("\t-P Purge all trash directories of all tests)");
Put("\t-V Print I/O replay program version");
Put("\t-w WD_BASE The working directory's base path");
Put("\t (default: /usr/local/ioreplay)");
Put("\t-x PID To specify a process ID (in conjunction with -c)");
Put("\t-m MODULE To specify a module (in conjunction with -c)");
Put("\nExample (run these commands one after another):");
Put("\t 1.) sudo ioreplay -c io.capture");
Put("\t 2.) sudo ioreplay -r io.replay -c io.capture -u paul -n test1");
Put("\t 3.) sudo ioreplay -i io.replay");
Put("\t 4.) sudo ioreplay -r io.replay -S");
}
/**
* @brief I/O Replay's entry point
*
* Not much more to document here though!
* @return The exit code
*/
int main(int argc, char **argv)
{
_arch_check_atomic();
status_e ret = UNKNOWN;
bool dont_drop_caches = false;
options_s *opts = options_new();
int opt = 0;
while ((opt = getopt(argc, argv, "Vr:R:S:c:u:i:hw:n:dDs:w:p:t:UPTx:m:")) != -1) {
switch (opt) {
case 'U':
utests_run();
Cleanup(SUCCESS);
break;
case 'V':
_print_version();
Cleanup(SUCCESS);
break;
case 'd':
drop_caches();
Cleanup(SUCCESS);
break;
case 'D':
dont_drop_caches = true;
break;
case 'c':
opts->capture_file = absolute_path(optarg);
Put("Capture file: %s", opts->capture_file);
break;
case 'P':
opts->purge = true;
Put("Purge option set");
break;
case 'T':
opts->trash = true;
Put("Trash option set");
break;
case 'i':
opts->init = true;
if (!opts->replay_file) {
opts->replay_file = absolute_path(optarg);
Put("Replay file: %s", opts->replay_file);
}
break;
case 'R':
opts->init = true;
opts->replay = true;
if (!opts->replay_file) {
opts->replay_file = absolute_path(optarg);
Put("Replay file: %s", opts->replay_file);
}
break;
case 'r':
opts->replay = true;
if (!opts->replay_file) {
opts->replay_file = absolute_path(optarg);
Put("Replay file: %s", opts->replay_file);
}
break;
case 'S':
opts->stats_file = Clone(optarg);
Put("Stats output file: %s", opts->stats_file);
break;
case 'w':
opts->wd_base = optarg;
Put("WD base: %s", opts->wd_base);
break;
case 'u':
opts->user = optarg;
Put("User: %s", opts->user);
break;
case 'm':
opts->module = Clone(optarg);
Put("Module: %s", opts->module);
break;
case 'n':
opts->name = optarg;
Put("Name: %s", opts->name);
break;
case 'h':
_print_help();
Cleanup(SUCCESS);
case 's':
sscanf(optarg, "%lf", &opts->speed_factor);
Put("Speed factor: %lf", opts->speed_factor);
break;
case 'p':
opts->num_workers = atoi(optarg);
if (opts->num_workers < 1)
opts->num_workers = 1;
Put("Num worker processes: %d", opts->num_workers);
break;
case 't':
opts->num_threads_per_worker = atoi(optarg);
if (opts->num_threads_per_worker < 1)
opts->num_threads_per_worker = 1;
Put("Num threads per worker: %d", opts->num_threads_per_worker);
break;
case 'x':
opts->pid = atoi(optarg);
Put("PID: %d", opts->pid);
break;
default:
_print_help();
Cleanup(ERROR);
}
}
if (opts->purge || opts->trash) {
// Clean up all temp data of previous test runs
Cleanup(cleanup_run(opts));
} else if (opts->capture_file && !opts->replay_file) {
// We are going to capture I/O
Cleanup(capture_run(opts));
} else if (opts->capture_file && opts->replay_file) {
// We are going to generate a .replay file from the .capture file
Cleanup(generate_run(opts));
} else if (opts->replay_file && opts->init && !opts->replay) {
// We are going to initialise the test from the .replay file!
Cleanup(init_run(opts));
} else if (opts->replay_file && opts->init && opts->replay) {
// We are going to initialise the test and run the test! Run the
// initialiser in a sub-process, as it drops root privileges!
pid_t pid = fork();
if (pid == 0) {
Cleanup(init_run(opts));
} else {
opts->drop_caches = !dont_drop_caches;
int init_status;
waitpid(pid, &init_status, 0);
// Only proceed if initialisation was successfull!
Cleanup_unless(SUCCESS, init_status);
Cleanup(replay_run(opts));
}
} else if (opts->replay_file && !opts->init && opts->replay) {
// We are going to replay the I/O
opts->drop_caches = !dont_drop_caches;
Cleanup(replay_run(opts));
} else {
_print_help();
Cleanup(ERROR);
}
cleanup:
options_destroy(opts);
return ret;
}
|
