X-Git-Url: https://git.whamcloud.com/?a=blobdiff_plain;f=lustre%2Ftests%2Fdirectio.c;h=da359b480cd92cfe1952f52199109547e2d1b841;hb=4f53536d002c13886210b672b657795baa067144;hp=7bcc5dc2dfa9e3a6da07724d4287c56840268aa3;hpb=2dc9c16e770415d56839e1996015fec5fab93f29;p=fs%2Flustre-release.git diff --git a/lustre/tests/directio.c b/lustre/tests/directio.c index 7bcc5dc..da359b4 100644 --- a/lustre/tests/directio.c +++ b/lustre/tests/directio.c @@ -1,7 +1,40 @@ -/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*- - * vim:expandtab:shiftwidth=8:tabstop=8: +/* + * GPL HEADER START + * + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 only, + * as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License version 2 for more details (a copy is included + * in the LICENSE file that accompanied this code). + * + * You should have received a copy of the GNU General Public License + * version 2 along with this program; If not, see + * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf + * + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, + * CA 95054 USA or visit www.sun.com if you need additional information or + * have any questions. + * + * GPL HEADER END */ +/* + * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved. + * Use is subject to license terms. + */ +/* + * This file is part of Lustre, http://www.lustre.org/ + * Lustre is a trademark of Sun Microsystems, Inc. + */ + +#ifndef _GNU_SOURCE #define _GNU_SOURCE +#endif #include #include #include @@ -12,192 +45,122 @@ #include #include -int write_buffer(char *fname, char *buffer, int len) +/* return index of the first byte not matching given byte + * or buffer size if all bytes are matching */ +static size_t check_bytes(const char *buf, int byte, size_t len) { - int fd, rc; - - fd = open(fname, O_WRONLY | O_CREAT | O_TRUNC, 0644); - if (fd == -1) { - printf("Cannot open %s: %s\n", fname, strerror(errno)); - exit(1); - } - rc = write(fd, buffer, len); - if (rc != len) { - printf("write: %d\n", rc); - exit(1); - } - close(fd); - return 0; -} + const char *p; -void verify(char *buffer, char *compare, int length) -{ - int i; - for (i = 0; i < length; i++) { - if (buffer[i] != compare[i]) { - fprintf(stderr, "garbage read (i=%d): expected %c, found %c\n", - i, compare[i], buffer[i]); - write_buffer("/tmp/dio1", buffer, length); - write_buffer("/tmp/dio2", compare, length); - exit(1); - } - } + for (p = buf; p < buf + len; p++) + if (*p != byte) + break; + return p - buf; } - int main(int argc, char **argv) { +#ifdef O_DIRECT int fd; - char *rbuf, *wbuf; + char *buf, *fname; int blocks, seek_blocks; long len; off64_t seek; struct stat64 st; + char pad = 0xba; + int action; int rc; - if (argc < 4 || argc > 5) { - printf("Usage: %s file seek nr_blocks [blocksize]\n", argv[0]); - return 1; - } - - seek_blocks = strtoul(argv[2], 0, 0); - blocks = strtoul(argv[3], 0, 0); - - fd = open(argv[1], O_LARGEFILE | O_DIRECT | O_RDWR | O_CREAT, 0644); - if (fd == -1) { - printf("Cannot open %s: %s\n", argv[1], strerror(errno)); - return 1; - } - - if (argc == 5) - st.st_blksize = strtoul(argv[4], 0, 0); - else if (fstat64(fd, &st) < 0) { - printf("Cannot stat %s: %s\n", argv[1], strerror(errno)); - return 1; - } - - fprintf(stderr, "directio on %s for %dx%lu bytes \n", argv[1], blocks, - st.st_blksize); - - seek = (off64_t)seek_blocks * (off64_t)st.st_blksize; -#if 0 - if (lseek64(fd, seek, SEEK_SET) < 0) { - printf("lseek64 failed: %s\n", strerror(errno)); - return 1; - } -#endif - len = blocks * st.st_blksize; - wbuf = mmap(0, len, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 0, 0); - if (wbuf == MAP_FAILED) { - printf("No memory %s\n", strerror(errno)); - return 1; - } - - rbuf = mmap(0, len, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 0, 0); - if (rbuf == MAP_FAILED) { - printf("No memory %s\n", strerror(errno)); + if (argc < 5 || argc > 6) { + printf("Usage: %s file seek nr_blocks [blocksize]\n", argv[0]); return 1; } - memset(wbuf, 0xba, len); - rc = write(fd, wbuf, len); - if (rc != len) { - printf("Write error %s (rc = %d)\n", strerror(errno), rc); + if (!strcmp(argv[1], "read")) + action = O_RDONLY; + else if (!strcmp(argv[1], "write")) + action = O_WRONLY; + else if (!strcmp(argv[1], "rdwr")) + action = O_RDWR; + else if (!strcmp(argv[1], "readhole")) { + action = O_RDONLY; + pad = 0; + } else { + printf("Usage: %s file seek nr_blocks [blocksize]\n", argv[0]); return 1; } - if (lseek64(fd, seek, SEEK_SET) < 0) { - printf("Cannot seek %s\n", strerror(errno)); + fname = argv[2]; + seek_blocks = strtoul(argv[3], 0, 0); + blocks = strtoul(argv[4], 0, 0); + if (!blocks) { + printf("Usage: %s file seek nr_blocks [blocksize]\n", argv[0]); return 1; } - rc = read(fd, rbuf, len); - if (rc != len) { - printf("Read error: %s (rc = %d)\n", strerror(errno), rc); - return 1; - } - - verify(rbuf, wbuf, len); - if (memcmp(wbuf, rbuf, len)) { - printf("Data mismatch on line %d\n", __LINE__); + fd = open(fname, O_LARGEFILE | O_DIRECT | O_RDWR | O_CREAT, 0644); + if (fd == -1) { + printf("Cannot open %s: %s\n", fname, strerror(errno)); return 1; } - /* try 512-byte buffers, and make sure that the other parts of the - * page aren't modified. */ - if (st.st_blksize < 4096) { - printf("512-byte block size tests skipped (because blocksize " - "passed is < 4k)\n"); - printf("PASS\n"); - return 0; - } - - - - /* write test */ - if (lseek64(fd, 512, SEEK_SET) < 0) { - printf("Cannot seek %s\n", strerror(errno)); + if (argc >= 6) + st.st_blksize = strtoul(argv[5], 0, 0); + else if (fstat64(fd, &st) < 0) { + printf("Cannot stat %s: %s\n", fname, strerror(errno)); return 1; } - memset(wbuf, 0x44, len); - memset(wbuf + 2048, 0x69, 512); - rc = write(fd, wbuf + 2048, 512); - if (rc != 512) { - printf("Write error %s (rc = %d)\n", strerror(errno), rc); - return 1; - } + printf("directio on %s for %dx%lu bytes \n", fname, blocks, + st.st_blksize); - memset(rbuf, 0x44, len); - memset(rbuf + 2048, 0x69, 512); - if (memcmp(wbuf, rbuf, len)) { - printf("Data mismatch on line %d\n", __LINE__); - return 1; - } + seek = (off64_t)seek_blocks * (off64_t)st.st_blksize; + len = blocks * st.st_blksize; - /* read test */ - if (lseek64(fd, 512, SEEK_SET) < 0) { - printf("Cannot seek %s\n", strerror(errno)); - return 1; - } - memset(rbuf, 0xba, len); - rc = read(fd, rbuf + 1024, 512); - if (rc != 512) { - printf("Read error: %s (rc = %d)\n", strerror(errno), rc); + buf = mmap(0, len, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 0, 0); + if (buf == MAP_FAILED) { + printf("No memory %s\n", strerror(errno)); return 1; } + memset(buf, pad, len); - memset(wbuf, 0xba, len); - memset(wbuf + 1024, 0x69, 512); - - verify(rbuf, wbuf, len); -#if 0 - if (memcmp(wbuf, rbuf, len)) { - printf("Data mismatch on line %d\n", __LINE__); - return 1; - } -#endif + if (action == O_WRONLY || action == O_RDWR) { + if (lseek64(fd, seek, SEEK_SET) < 0) { + printf("lseek64 failed: %s\n", strerror(errno)); + return 1; + } - /* read back the whole block, to see that it's untouched. */ - if (lseek64(fd, seek, SEEK_SET) < 0) { - printf("Cannot seek %s\n", strerror(errno)); - return 1; + rc = write(fd, buf, len); + if (rc != len) { + printf("Write error %s (rc = %d, len = %ld)\n", + strerror(errno), rc, len); + return 1; + } } - memset(rbuf, 0x1, len); - rc = read(fd, rbuf, len); - if (rc != len) { - printf("Read error: %s (rc = %d)\n", strerror(errno), rc); - return 1; - } + if (action == O_RDONLY || action == O_RDWR) { + if (lseek64(fd, seek, SEEK_SET) < 0) { + printf("Cannot seek %s\n", strerror(errno)); + return 1; + } + /* reset all bytes to something nor 0x0 neither 0xab */ + memset(buf, 0x5e, len); + rc = read(fd, buf, len); + if (rc != len) { + printf("Read error: %s rc = %d\n",strerror(errno),rc); + return 1; + } - memset(wbuf, 0xba, len); - memset(wbuf + 512, 0x69, 512); - if (memcmp(wbuf, rbuf, len)) { - printf("Data mismatch on line %d\n", __LINE__); - return 1; + if (check_bytes(buf, pad, len) != len) { + printf("Data mismatch\n"); + return 1; + } } printf("PASS\n"); return 0; +#else /* !O_DIRECT */ +#warning O_DIRECT not defined, directio test will fail + printf("O_DIRECT not defined\n"); + return 1; +#endif /* !O_DIRECT */ }