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 "freebsd_test_suite/macros.h"
49 #include "local.h"
50
51 #define PATH_TEMPLATE "aio.XXXXXXXXXX"
52
53 #define MAX_RUNS 300
54 /* #define DEBUG */
55
56 int
main(int argc,char * argv[])57 main (int argc, char *argv[])
58 {
59 struct aiocb **iocb, *kq_iocb;
60 char *file, pathname[sizeof(PATH_TEMPLATE)+1];
61 struct kevent kq_returned;
62 struct timespec ts;
63 char buffer[32768];
64 int max_queue_per_proc;
65 size_t max_queue_per_proc_size;
66 #ifdef DEBUG
67 int cancel, error;
68 #endif
69 int failed = 0, fd, kq, pending, result, run;
70 int tmp_file = 0;
71 int i, j;
72
73 PLAIN_REQUIRE_KERNEL_MODULE("aio", 0);
74 PLAIN_REQUIRE_UNSAFE_AIO(0);
75
76 max_queue_per_proc_size = sizeof(max_queue_per_proc);
77 if (sysctlbyname("vfs.aio.max_aio_queue_per_proc",
78 &max_queue_per_proc, &max_queue_per_proc_size, NULL, 0) != 0)
79 err(1, "sysctlbyname");
80 iocb = calloc(max_queue_per_proc, sizeof(struct aiocb*));
81 if (iocb == NULL)
82 err(1, "calloc");
83
84 kq = kqueue();
85 if (kq < 0) {
86 perror("No kqeueue\n");
87 exit(1);
88 }
89
90 if (argc == 1) {
91 strcpy(pathname, PATH_TEMPLATE);
92 fd = mkstemp(pathname);
93 file = pathname;
94 tmp_file = 1;
95 } else {
96 file = argv[1];
97 fd = open(file, O_RDWR|O_CREAT, 0666);
98 }
99 if (fd == -1)
100 err(1, "Can't open %s\n", file);
101
102 for (run = 0; run < MAX_RUNS; run++){
103 #ifdef DEBUG
104 printf("Run %d\n", run);
105 #endif
106 for (i = 0; i < max_queue_per_proc; i++) {
107 iocb[i] = (struct aiocb *)calloc(1,
108 sizeof(struct aiocb));
109 if (iocb[i] == NULL)
110 err(1, "calloc");
111 }
112
113 pending = 0;
114 for (i = 0; i < max_queue_per_proc; i++) {
115 pending++;
116 iocb[i]->aio_nbytes = sizeof(buffer);
117 iocb[i]->aio_buf = buffer;
118 iocb[i]->aio_fildes = fd;
119 iocb[i]->aio_offset = iocb[i]->aio_nbytes * i * run;
120
121 iocb[i]->aio_sigevent.sigev_notify_kqueue = kq;
122 iocb[i]->aio_sigevent.sigev_value.sival_ptr = iocb[i];
123 iocb[i]->aio_sigevent.sigev_notify = SIGEV_KEVENT;
124
125 result = aio_write(iocb[i]);
126 if (result != 0) {
127 perror("aio_write");
128 printf("Result %d iteration %d\n", result, i);
129 exit(1);
130 }
131 #ifdef DEBUG
132 printf("WRITE %d is at %p\n", i, iocb[i]);
133 #endif
134 result = rand();
135 if (result < RAND_MAX/32) {
136 if (result > RAND_MAX/64) {
137 result = aio_cancel(fd, iocb[i]);
138 #ifdef DEBUG
139 printf("Cancel %d %p result %d\n", i, iocb[i], result);
140 #endif
141 if (result == AIO_CANCELED) {
142 aio_return(iocb[i]);
143 iocb[i] = NULL;
144 pending--;
145 }
146 }
147 }
148 }
149 #ifdef DEBUG
150 cancel = max_queue_per_proc - pending;
151 #endif
152
153 i = 0;
154 while (pending) {
155
156 for (;;) {
157
158 bzero(&kq_returned, sizeof(kq_returned));
159 ts.tv_sec = 0;
160 ts.tv_nsec = 1;
161 result = kevent(kq, NULL, 0,
162 &kq_returned, 1, &ts);
163 #ifdef DEBUG
164 error = errno;
165 #endif
166 if (result < 0)
167 perror("kevent error: ");
168 kq_iocb = kq_returned.udata;
169 #ifdef DEBUG
170 printf("kevent %d %d errno %d return.ident %p "
171 "return.data %p return.udata %p %p"
172 " filter %d flags %#x fflags %#x\n",
173 i, result, error,
174 (void*)kq_returned.ident,
175 (void*)kq_returned.data,
176 kq_returned.udata,
177 kq_iocb,
178 kq_returned.filter,
179 kq_returned.flags,
180 kq_returned.fflags);
181 if (result > 0)
182 printf("\tsigev_notify_kevent_flags %#x\n",
183 ((struct aiocb*)(kq_returned.ident))->aio_sigevent.sigev_notify_kevent_flags);
184 #endif
185
186 if (kq_iocb)
187 break;
188 #ifdef DEBUG
189 printf("Try again left %d out of %d %d\n",
190 pending, max_queue_per_proc, cancel);
191 #endif
192 }
193
194 for (j = 0; j < max_queue_per_proc && iocb[j] != kq_iocb;
195 j++) ;
196 assert(j < max_queue_per_proc);
197 #ifdef DEBUG
198 printf("kq_iocb %p\n", kq_iocb);
199
200 printf("Error Result for %d is %d pending %d\n",
201 j, result, pending);
202 #endif
203 result = aio_return(kq_iocb);
204 #ifdef DEBUG
205 printf("Return Result for %d is %d\n\n", j, result);
206 #endif
207 if (result != sizeof(buffer)) {
208 printf("FAIL: run %d, operation %d, result %d "
209 " (errno=%d) should be %zu\n", run, pending,
210 result, errno, sizeof(buffer));
211 failed++;
212 } else
213 printf("PASS: run %d, left %d\n", run,
214 pending - 1);
215
216 free(kq_iocb);
217 iocb[j] = NULL;
218 pending--;
219 i++;
220 }
221
222 for (i = 0; i < max_queue_per_proc; i++)
223 free(iocb[i]);
224
225 }
226
227 if (tmp_file)
228 unlink(pathname);
229
230 if (failed != 0)
231 printf("FAIL: %d tests failed\n", failed);
232 else
233 printf("PASS: All tests passed\n");
234
235 exit (failed == 0 ? 0 : 1);
236 }
237