138 lines
3.2 KiB
Bash
Executable File
138 lines
3.2 KiB
Bash
Executable File
#!/bin/sh
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#
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# Copyright (c) 2016 EMC Corp.
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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# SUCH DAMAGE.
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#
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# Test parallel read access to /dev.
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# "panic: Most recently used by DEVFS1" seen.
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# https://people.freebsd.org/~pho/stress/log/dev.txt
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# Fixed by r293826.
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[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1
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. ../default.cfg
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here=`pwd`
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cd /tmp
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sed '1,/^EOF/d' < $here/$0 > dev.c
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mycc -o dev -Wall -Wextra -O2 dev.c || exit 1
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rm -f dev.c
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echo "Expect: g_access(958): provider ufsid/5c581221fcac7d80 has error 6 set"
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daemon sh -c \
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"(cd $here/../testcases/swap; ./swap -t 6m -i 20 -k -l 100)" > \
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/dev/null
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/tmp/dev # Note: this runs as root.
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s=$?
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while pkill -9 swap; do
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:
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done
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rm -f /tmp/dev
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exit $s
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EOF
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <fts.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <time.h>
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#include <unistd.h>
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#define PARALLEL 4
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#define RUNTIME 300
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char path[80];
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void
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churn(char *path)
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{
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FTS *fts;
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FTSENT *p;
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time_t start;
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int fd, ftsoptions;
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char *args[2];
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ftsoptions = FTS_PHYSICAL;
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args[0] = path;
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args[1] = 0;
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start = time(NULL);
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while (time(NULL) - start < RUNTIME) {
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if ((fts = fts_open(args, ftsoptions, NULL)) == NULL)
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err(1, "fts_open");
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while ((p = fts_read(fts)) != NULL) {
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if (p->fts_info == FTS_D ||
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p->fts_info == FTS_DP)
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continue;
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if (strstr(p->fts_path, "ttyu") != NULL)
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continue;
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if (strstr(p->fts_path, "fcdm") != NULL)
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continue;
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if ((fd = open(p->fts_path, O_RDONLY|O_NONBLOCK)) == -1)
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continue;
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usleep(arc4random() % 1000);
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close(fd);
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}
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if (errno != 0 && errno != ENOENT)
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warn("fts_read");
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if (fts_close(fts) == -1)
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err(1, "fts_close()");
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}
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_exit(0);
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}
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int
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main(void)
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{
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int e, i, status;;
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e = 0;
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for (i = 0; i < PARALLEL; i++)
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if (fork() == 0)
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churn("/dev");
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for (i = 0; i < PARALLEL; i++) {
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wait(&status);
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if (status != 0)
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e++;
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}
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return (e);
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}
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