1 /*-
2 * Copyright (C) 2005 IronPort Systems, Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
23 * SUCH DAMAGE.
24 */
25
26 /*
27 * Prerequisities:
28 * - AIO support must be compiled into the kernel (see sys/<arch>/NOTES for
29 * more details).
30 *
31 * Note: it is a good idea to run this against a physical drive to
32 * exercise the physio fast path (ie. aio_kqueue /dev/<something safe>)
33 */
34
35 #include <sys/types.h>
36 #include <sys/event.h>
37 #include <sys/time.h>
38 #include <assert.h>
39 #include <aio.h>
40 #include <err.h>
41 #include <errno.h>
42 #include <fcntl.h>
43 #include <stdlib.h>
44 #include <stdio.h>
45 #include <string.h>
46 #include <unistd.h>
47
48 #include "local.h"
49
50 #define PATH_TEMPLATE "aio.XXXXXXXXXX"
51
52 #define MAX_RUNS 300
53 /* #define DEBUG */
54
55 int
main(int argc,char * argv[])56 main (int argc, char *argv[])
57 {
58 struct aiocb **iocb, *kq_iocb;
59 char *file, pathname[sizeof(PATH_TEMPLATE)+1];
60 struct kevent kq_returned;
61 struct timespec ts;
62 char buffer[32768];
63 int max_queue_per_proc;
64 size_t max_queue_per_proc_size;
65 #ifdef DEBUG
66 int cancel, error;
67 #endif
68 int failed = 0, fd, kq, pending, result, run;
69 int tmp_file = 0;
70 int i, j;
71
72 PLAIN_REQUIRE_UNSAFE_AIO(0);
73
74 max_queue_per_proc_size = sizeof(max_queue_per_proc);
75 if (sysctlbyname("vfs.aio.max_aio_queue_per_proc",
76 &max_queue_per_proc, &max_queue_per_proc_size, NULL, 0) != 0)
77 err(1, "sysctlbyname");
78 iocb = calloc(max_queue_per_proc, sizeof(struct aiocb*));
79 if (iocb == NULL)
80 err(1, "calloc");
81
82 kq = kqueue();
83 if (kq < 0) {
84 perror("No kqeueue\n");
85 exit(1);
86 }
87
88 if (argc == 1) {
89 strcpy(pathname, PATH_TEMPLATE);
90 fd = mkstemp(pathname);
91 file = pathname;
92 tmp_file = 1;
93 } else {
94 file = argv[1];
95 fd = open(file, O_RDWR|O_CREAT, 0666);
96 }
97 if (fd == -1)
98 err(1, "Can't open %s\n", file);
99
100 for (run = 0; run < MAX_RUNS; run++){
101 #ifdef DEBUG
102 printf("Run %d\n", run);
103 #endif
104 for (i = 0; i < max_queue_per_proc; i++) {
105 iocb[i] = (struct aiocb *)calloc(1,
106 sizeof(struct aiocb));
107 if (iocb[i] == NULL)
108 err(1, "calloc");
109 }
110
111 pending = 0;
112 for (i = 0; i < max_queue_per_proc; i++) {
113 pending++;
114 iocb[i]->aio_nbytes = sizeof(buffer);
115 iocb[i]->aio_buf = buffer;
116 iocb[i]->aio_fildes = fd;
117 iocb[i]->aio_offset = iocb[i]->aio_nbytes * i * run;
118
119 iocb[i]->aio_sigevent.sigev_notify_kqueue = kq;
120 iocb[i]->aio_sigevent.sigev_value.sival_ptr = iocb[i];
121 iocb[i]->aio_sigevent.sigev_notify = SIGEV_KEVENT;
122
123 result = aio_write(iocb[i]);
124 if (result != 0) {
125 perror("aio_write");
126 printf("Result %d iteration %d\n", result, i);
127 exit(1);
128 }
129 #ifdef DEBUG
130 printf("WRITE %d is at %p\n", i, iocb[i]);
131 #endif
132 result = rand();
133 if (result < RAND_MAX/32) {
134 if (result > RAND_MAX/64) {
135 result = aio_cancel(fd, iocb[i]);
136 #ifdef DEBUG
137 printf("Cancel %d %p result %d\n", i, iocb[i], result);
138 #endif
139 if (result == AIO_CANCELED) {
140 aio_return(iocb[i]);
141 iocb[i] = NULL;
142 pending--;
143 }
144 }
145 }
146 }
147 #ifdef DEBUG
148 cancel = max_queue_per_proc - pending;
149 #endif
150
151 i = 0;
152 while (pending) {
153
154 for (;;) {
155
156 bzero(&kq_returned, sizeof(kq_returned));
157 ts.tv_sec = 0;
158 ts.tv_nsec = 1;
159 result = kevent(kq, NULL, 0,
160 &kq_returned, 1, &ts);
161 #ifdef DEBUG
162 error = errno;
163 #endif
164 if (result < 0)
165 perror("kevent error: ");
166 kq_iocb = kq_returned.udata;
167 #ifdef DEBUG
168 printf("kevent %d %d errno %d return.ident %p "
169 "return.data %p return.udata %p %p"
170 " filter %d flags %#x fflags %#x\n",
171 i, result, error,
172 (void*)kq_returned.ident,
173 (void*)kq_returned.data,
174 kq_returned.udata,
175 kq_iocb,
176 kq_returned.filter,
177 kq_returned.flags,
178 kq_returned.fflags);
179 if (result > 0)
180 printf("\tsigev_notify_kevent_flags %#x\n",
181 ((struct aiocb*)(kq_returned.ident))->aio_sigevent.sigev_notify_kevent_flags);
182 #endif
183
184 if (kq_iocb)
185 break;
186 #ifdef DEBUG
187 printf("Try again left %d out of %d %d\n",
188 pending, max_queue_per_proc, cancel);
189 #endif
190 }
191
192 for (j = 0; j < max_queue_per_proc && iocb[j] != kq_iocb;
193 j++) ;
194 assert(j < max_queue_per_proc);
195 #ifdef DEBUG
196 printf("kq_iocb %p\n", kq_iocb);
197
198 printf("Error Result for %d is %d pending %d\n",
199 j, result, pending);
200 #endif
201 result = aio_return(kq_iocb);
202 #ifdef DEBUG
203 printf("Return Result for %d is %d\n\n", j, result);
204 #endif
205 if (result != sizeof(buffer)) {
206 printf("FAIL: run %d, operation %d, result %d "
207 " (errno=%d) should be %zu\n", run, pending,
208 result, errno, sizeof(buffer));
209 failed++;
210 } else
211 printf("PASS: run %d, left %d\n", run,
212 pending - 1);
213
214 free(kq_iocb);
215 iocb[j] = NULL;
216 pending--;
217 i++;
218 }
219
220 for (i = 0; i < max_queue_per_proc; i++)
221 free(iocb[i]);
222
223 }
224
225 if (tmp_file)
226 unlink(pathname);
227
228 if (failed != 0)
229 printf("FAIL: %d tests failed\n", failed);
230 else
231 printf("PASS: All tests passed\n");
232
233 exit (failed == 0 ? 0 : 1);
234 }
235