| /* |
| * Copyright (c) 2000-2003 Silicon Graphics, Inc. |
| * All Rights Reserved. |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License as |
| * published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it would 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 for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #include <unistd.h> |
| #include <sys/types.h> |
| #include <sys/stat.h> |
| #include <fcntl.h> |
| #include <errno.h> |
| #include <time.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| |
| #ifndef O_DIRECT |
| #define O_DIRECT 040000 |
| #endif |
| |
| #define WAITTIME 60 |
| #define BUFSIZE 4096 |
| #define ALIGNMENT 16384 |
| #define TRUNCSIZE 1000 |
| |
| /* write data to disk - buffered/sync or direct |
| * write different buffered data to disk |
| * truncate |
| * direct read back, see if server puts stale data down |
| */ |
| |
| int |
| main(argc, argv) |
| int argc; |
| char **argv; |
| { |
| int fd, err, elapsed; |
| char *buf = NULL, *goodbuf = NULL; |
| time_t starttime; |
| char *filename="testfile"; |
| int c; |
| |
| if (argc != 3) { |
| printf("Usage: trunc -f testfilename\n"); |
| exit(1); |
| } |
| |
| while((c=getopt(argc,argv,"f:"))!=EOF) { |
| switch (c) { |
| case 'f': |
| filename = optarg; |
| break; |
| default: |
| fprintf(stderr,"Usage: trunc -f filename\n"); |
| exit(1); |
| } |
| } |
| |
| err = posix_memalign((void **)&buf, ALIGNMENT, BUFSIZE); |
| if (err) |
| fprintf(stderr, "posix_memalign failed: %s\n", strerror(err)); |
| |
| err = posix_memalign((void **)&goodbuf, ALIGNMENT, BUFSIZE); |
| if (err) |
| fprintf(stderr, "posix_memalign failed: %s\n", strerror(err)); |
| |
| err = unlink(filename); |
| /* if (err < 0) perror("unlink failed");*/ |
| |
| fd = open(filename, O_CREAT|O_RDWR|O_DIRECT, 0666); |
| if (fd < 0) perror("direct open failed"); |
| |
| memset(buf, 1, BUFSIZE); |
| |
| printf("direct write of 1's into file\n"); |
| err = write(fd, buf, BUFSIZE); |
| if (err < 0) perror("direct write failed"); |
| |
| close(fd); |
| |
| fd = open(filename, O_CREAT|O_RDWR, 0666); |
| if (fd < 0) perror("buffered open failed"); |
| |
| /* 1 now on disk */ |
| |
| memset(buf, 2, BUFSIZE); |
| memset(goodbuf, 2, BUFSIZE); |
| |
| printf("buffered write of 2's into file\n"); |
| err = write(fd, buf, BUFSIZE); |
| if (err < 0) perror("buffered write failed"); |
| |
| /* 1 now on disk, but 2 data is buffered */ |
| |
| printf("truncate file\n"); |
| err = ftruncate(fd, TRUNCSIZE); |
| if (err < 0) perror("ftruncate failed"); |
| starttime = time(NULL); |
| |
| printf("sync buffered data (2's)\n"); |
| err = fdatasync(fd); |
| if (err < 0) perror("fdatasync failed"); |
| |
| /* during truncate server may have read/modified/written last block */ |
| |
| close(fd); |
| |
| fd = open(filename, O_CREAT|O_RDWR|O_DIRECT, 0666); |
| if (fd < 0) perror("direct open failed"); |
| |
| /* read what's really on disk now */ |
| |
| printf("iterate direct reads for %ds or until failure...\n", WAITTIME); |
| |
| while ((elapsed = (time(NULL) - starttime)) <= WAITTIME) { |
| |
| /* printf("."); |
| fflush(stdout);*/ |
| |
| err = lseek(fd, 0, SEEK_SET); |
| if (err < 0) perror("lseek failed"); |
| |
| err = read(fd, buf, BUFSIZE); |
| if (err < 0) perror("read failed"); |
| |
| err = memcmp(buf, goodbuf, 100); |
| if (err) { |
| printf("\nFailed after %d secs: read %d's\n", elapsed, buf[0]); |
| return 1; |
| } |
| |
| sleep(1); |
| } |
| |
| free(buf); |
| free(goodbuf); |
| |
| printf("Passed\n"); |
| return 0; |
| } |
| |
| |