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t_aio_suspend.c revision 1.1 
      1 /*	$NetBSD: t_aio_suspend.c,v 1.1 2025/10/10 15:53:55 christos Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2025 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND
     17  * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
     18  * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
     19  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     20  * IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY
     21  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
     23  * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     24  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
     25  * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
     26  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
     27  * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     28  */
     29 
     30 #include <atf-c.h>
     31 
     32 #include <aio.h>
     33 #include <errno.h>
     34 #include <fcntl.h>
     35 #include <signal.h>
     36 #include <stdint.h>
     37 #include <stdio.h>
     38 #include <stdlib.h>
     39 #include <string.h>
     40 #include <sys/stat.h>
     41 #include <sys/types.h>
     42 #include <time.h>
     43 #include <unistd.h>
     44 
     45 static int	mktemp_file(char *, size_t);
     46 static void	fill_pattern(uint8_t *, size_t, uint8_t);
     47 static void	wait_cb(struct aiocb *);
     48 
     49 static int
     50 mktemp_file(char *path, size_t pathlen)
     51 {
     52 	int fd, n;
     53 
     54 	n = snprintf(path, pathlen, "t_aio_suspend.XXXXXX");
     55 	ATF_REQUIRE(n > 0 && (size_t)n < pathlen);
     56 
     57 	fd = mkstemp(path);
     58 	ATF_REQUIRE(fd >= 0);
     59 
     60 	return fd;
     61 }
     62 
     63 static void
     64 fill_pattern(uint8_t *buf, size_t len, uint8_t seed)
     65 {
     66 	size_t i;
     67 
     68 	for (i = 0; i < len; i++) {
     69 		buf[i] = (uint8_t)(seed + (i & 0xff));
     70 	}
     71 }
     72 
     73 static void
     74 wait_cb(struct aiocb *cb)
     75 {
     76 	const struct aiocb *one[1];
     77 	int rv;
     78 
     79 	one[0] = cb;
     80 	while (aio_error(cb) == EINPROGRESS) {
     81 		rv = aio_suspend(one, 1, NULL);
     82 		ATF_REQUIRE_EQ(0, rv);
     83 	}
     84 	if (aio_error(cb) == 0) {
     85 		aio_return(cb);
     86 	}
     87 }
     88 
     89 ATF_TC_WITHOUT_HEAD(suspend_any);
     90 ATF_TC_BODY(suspend_any, tc)
     91 {
     92 	char path[64];
     93 	int fd, rv;
     94 	const size_t blksz = 4096;
     95 	uint8_t *buf0, *buf1;
     96 	struct aiocb cb0, cb1;
     97 	const struct aiocb *list[2];
     98 	int done;
     99 
    100 	fd = mktemp_file(path, sizeof(path));
    101 
    102 	buf0 = malloc(blksz);
    103 	buf1 = malloc(blksz);
    104 	ATF_REQUIRE(buf0 != NULL && buf1 != NULL);
    105 	fill_pattern(buf0, blksz, 0x20);
    106 	fill_pattern(buf1, blksz, 0x40);
    107 
    108 	memset(&cb0, 0, sizeof(cb0));
    109 	cb0.aio_fildes = fd;
    110 	cb0.aio_buf = buf0;
    111 	cb0.aio_nbytes = blksz;
    112 	cb0.aio_offset = 0;
    113 
    114 	memset(&cb1, 0, sizeof(cb1));
    115 	cb1.aio_fildes = fd;
    116 	cb1.aio_buf = buf1;
    117 	cb1.aio_nbytes = blksz;
    118 	cb1.aio_offset = blksz;
    119 
    120 	ATF_REQUIRE_EQ(0, aio_write(&cb0));
    121 	ATF_REQUIRE_EQ(0, aio_write(&cb1));
    122 
    123 	list[0] = &cb0;
    124 	list[1] = &cb1;
    125 
    126 	rv = aio_suspend(list, 2, NULL);
    127 	ATF_REQUIRE_EQ(0, rv);
    128 
    129 	done = 0;
    130 	if (aio_error(&cb0) != EINPROGRESS) {
    131 		done++;
    132 		if (aio_error(&cb0) == 0) {
    133 			ATF_REQUIRE_EQ((ssize_t)blksz, aio_return(&cb0));
    134 		} else {
    135 			ATF_REQUIRE_EQ(ECANCELED, aio_error(&cb0));
    136 			ATF_REQUIRE_EQ(-1, aio_return(&cb0));
    137 		}
    138 	}
    139 	if (aio_error(&cb1) != EINPROGRESS) {
    140 		done++;
    141 		if (aio_error(&cb1) == 0) {
    142 			ATF_REQUIRE_EQ((ssize_t)blksz, aio_return(&cb1));
    143 		} else {
    144 			ATF_REQUIRE_EQ(ECANCELED, aio_error(&cb1));
    145 			ATF_REQUIRE_EQ(-1, aio_return(&cb1));
    146 		}
    147 	}
    148 	ATF_REQUIRE(done >= 1);
    149 
    150 	if (aio_error(&cb0) == EINPROGRESS) {
    151 		wait_cb(&cb0);
    152 	}
    153 	if (aio_error(&cb1) == EINPROGRESS) {
    154 		wait_cb(&cb1);
    155 	}
    156 
    157 	rv = close(fd);
    158 	ATF_REQUIRE_EQ(0, rv);
    159 	rv = unlink(path);
    160 	ATF_REQUIRE_EQ(0, rv);
    161 
    162 	free(buf0);
    163 	free(buf1);
    164 }
    165 
    166 ATF_TP_ADD_TCS(tp)
    167 {
    168 	ATF_TP_ADD_TC(tp, suspend_any);
    169 	return atf_no_error();
    170 }
    171