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1f8c39ddb2
These are all the same shape: set up the pool to suspend on first write, then perform some write+sync operation. The pool should suspend, and the sync operation should respond according to the failmode= property. We test fsync(), msync() and two forms of write() (open with O_SYNC, and async with sync=always), which all take slightly different paths to zil_commit() and back. A helper function is included to do the write+sync sequence with mmap() and msync(), since I didn't find a convenient tool to do that. Sponsored-by: Klara, Inc. Sponsored-by: Wasabi Technology, Inc. Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Reviewed-by: Alexander Motin <alexander.motin@TrueNAS.com> Signed-off-by: Rob Norris <rob.norris@klarasystems.com> Closes #17398
85 lines
1.9 KiB
C
85 lines
1.9 KiB
C
// SPDX-License-Identifier: CDDL-1.0
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/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License (the "License").
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* You may not use this file except in compliance with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or https://opensource.org/licenses/CDDL-1.0.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*/
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/*
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* Copyright (c) 2025, Klara, Inc.
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*/
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#include <stdio.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <fcntl.h>
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#include <sys/stat.h>
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#include <sys/mman.h>
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#define PAGES (8)
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int
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main(int argc, char **argv)
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{
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if (argc != 2) {
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fprintf(stderr, "usage: %s <filename>\n", argv[0]);
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exit(1);
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}
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long page_size = sysconf(_SC_PAGESIZE);
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if (page_size < 0) {
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perror("sysconf");
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exit(2);
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}
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size_t map_size = page_size * PAGES;
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int fd = open(argv[1], O_CREAT|O_RDWR, S_IRWXU|S_IRWXG|S_IRWXO);
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if (fd < 0) {
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perror("open");
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exit(2);
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}
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if (ftruncate(fd, map_size) < 0) {
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perror("ftruncate");
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close(fd);
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exit(2);
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}
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uint64_t *p =
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mmap(NULL, map_size, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
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if (p == MAP_FAILED) {
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perror("mmap");
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close(fd);
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exit(2);
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}
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for (int i = 0; i < (map_size / sizeof (uint64_t)); i++)
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p[i] = 0x0123456789abcdef;
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if (msync(p, map_size, MS_SYNC) < 0) {
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perror("msync");
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munmap(p, map_size);
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close(fd);
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exit(3);
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}
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munmap(p, map_size);
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close(fd);
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exit(0);
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}
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