I've done some work to merge some of the existing fsx.c mods into a single version. Over & above the version that is in the LTP, I've included AKPM's O_DIRECT fixes (with a twist), the BSD mmap page and segfault handling, and per-write fsync. The twist for the O_DIRECT feature is that it will randomly open file descriptors with O_DIRECT, and if you use the Lustre-inspired multi-fd support (by specifying multiple pathnames for the output file) fsx will be testing buffered and O_DIRECT and mmap IO on the same file. Updated patch to have proper fallocate() handling in case glibc doesn't have this, for non-x86 architectures from MingMing Cao, based on code used by DB2. Signed-off-by: Andreas Dilger <adilger@xxxxxxx> /* * Copyright (C) 1991, NeXT Computer, Inc. All Rights Reserverd. * Copyright (c) 1998-2001 Apple Computer, Inc. All rights reserved. * * @APPLE_LICENSE_HEADER_START@ * * The contents of this file constitute Original Code as defined in and * are subject to the Apple Public Source License Version 1.1 (the * "License"). You may not use this file except in compliance with the * License. Please obtain a copy of the License at * http://www.apple.com/publicsource and read it before using this file. * * This Original Code and all software distributed under the License are * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the * License for the specific language governing rights and limitations * under the License. * * @APPLE_LICENSE_HEADER_END@ * * File: fsx.c * Author: Avadis Tevanian, Jr. * * File system exerciser. * * Rewrite and enhancements 1998-2001 Conrad Minshall -- conrad@xxxxxxx * * Various features from Joe Sokol, Pat Dirks, and Clark Warner. * * Small changes to work under Linux -- davej@xxxxxxx * * Sundry porting patches from Guy Harris 12/2001 * * Checks for mmap last-page zero fill. * * Add multi-file testing feature -- Zach Brown <zab@xxxxxxxxxxxxx> * * $FreeBSD: src/tools/regression/fsx/fsx.c,v 1.2 2003/04/23 23:42:23 jkh Exp $ * $DragonFly: src/test/stress/fsx/fsx.c,v 1.2 2005/05/02 19:31:56 dillon Exp $ * */ #include <sys/types.h> #include <sys/stat.h> #if defined(_UWIN) || defined(__linux__) # include <sys/param.h> # include <limits.h> # include <time.h> # include <strings.h> # include <sys/time.h> #endif #include <fcntl.h> #include <sys/mman.h> #ifndef MAP_FILE # define MAP_FILE 0 #endif #include <limits.h> #include <signal.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <unistd.h> #include <stdarg.h> #include <errno.h> #include <setjmp.h> /* * A log entry is an operation and a bunch of arguments. */ struct log_entry { int operation; int args[3]; struct timeval tv; }; #define LOGSIZE 100000 struct log_entry oplog[LOGSIZE]; /* the log */ int logptr = 0; /* current position in log */ int logcount = 0; /* total ops */ int jmpbuf_good; jmp_buf jmpbuf; /* * Define operations */ #define OP_READ 1 #define OP_WRITE 2 #define OP_TRUNCATE 3 #define OP_CLOSEOPEN 4 #define OP_MAPREAD 5 #define OP_MAPWRITE 6 #define OP_SKIPPED 7 int page_size; int page_mask; char *original_buf; /* a pointer to the original data */ char *good_buf; /* a pointer to the correct data */ char *temp_buf; /* a pointer to the current data */ char *fname; /* name of our test file */ char logfile[1024]; /* name of our log file */ char goodfile[1024]; /* name of our test file */ off_t file_size = 0; off_t biggest = 0; char state[256]; unsigned long testcalls = 0; /* calls to function "test" */ unsigned long simulatedopcount = 0; /* -b flag */ int closeprob = 0; /* -c flag */ int debug = 0; /* -d flag */ unsigned long debugstart = 0; /* -D flag */ int do_fsync = 0; /* -f flag */ unsigned long maxfilelen = 256 * 1024; /* -l flag */ int sizechecks = 1; /* -n flag disables them */ int maxoplen = 64 * 1024; /* -o flag */ int quiet = 0; /* -q flag */ unsigned long progressinterval = 0; /* -p flag */ int readbdy = 1; /* -r flag */ int style = 0; /* -s flag */ int truncbdy = 1; /* -t flag */ int writebdy = 1; /* -w flag */ long monitorstart = -1; /* -m flag */ long monitorend = -1; /* -m flag */ int lite = 0; /* -L flag */ long numops = -1; /* -N flag */ int randomoplen = 1; /* -O flag disables it */ int seed = 1; /* -S flag */ int mapped_writes = 1; /* -W flag disables */ int mapped_reads = 1; /* -R flag disables it */ int prealloc = 0; /* -x [0|1|2] run with prealloc */ int o_direct = 0; /* -Z flag */ int fsxgoodfd = 0; FILE *fsxlogf = NULL; int badoff = -1; void vwarnc(code, fmt, ap) int code; const char *fmt; va_list ap; { fprintf(stderr, "fsx: "); if (fmt != NULL) { vfprintf(stderr, fmt, ap); fprintf(stderr, ": "); } fprintf(stderr, "%s\n", strerror(code)); } void warn(const char * fmt, ...) { va_list ap; va_start(ap, fmt); vwarnc(errno, fmt, ap); va_end(ap); } static void *round_up(void *ptr, unsigned long align) { unsigned long ret = (unsigned long)ptr; ret = ((ret + align - 1) & ~(align - 1)); return (void *)ret; } void __attribute__((format(printf, 1, 2))) prt(char *fmt, ...) { va_list args; va_start(args, fmt); vfprintf(stdout, fmt, args); va_end(args); if (fsxlogf) { va_start(args, fmt); vfprintf(fsxlogf, fmt, args); va_end(args); } } void prterr(char *prefix) { prt("%s%s%s\n", prefix, prefix ? ": " : "", strerror(errno)); } void log4(int operation, int arg0, int arg1, int arg2, struct timeval *tv) { struct log_entry *le; le = &oplog[logptr]; le->tv = *tv; le->operation = operation; le->args[0] = arg0; le->args[1] = arg1; le->args[2] = arg2; logptr++; logcount++; if (logptr >= LOGSIZE) logptr = 0; } void logdump(void) { int i, count, down; struct log_entry *lp; prt("LOG DUMP (%d total operations):\n", logcount); if (logcount < LOGSIZE) { i = 0; count = logcount; } else { i = logptr; count = LOGSIZE; } for ( ; count > 0; count--) { int opnum; opnum = i+1 + (logcount/LOGSIZE)*LOGSIZE; lp = &oplog[i]; prt("%d: %lu.%06lu ", opnum, lp->tv.tv_sec, lp->tv.tv_usec); switch (lp->operation) { case OP_MAPREAD: prt("MAPREAD 0x%x thru 0x%x (0x%x bytes)", lp->args[0], lp->args[0] + lp->args[1] - 1, lp->args[1]); if (badoff >= lp->args[0] && badoff < lp->args[0] + lp->args[1]) prt("\t***RRRR***"); break; case OP_MAPWRITE: prt("MAPWRITE 0x%x thru 0x%x (0x%x bytes)", lp->args[0], lp->args[0] + lp->args[1] - 1, lp->args[1]); if (badoff >= lp->args[0] && badoff < lp->args[0] + lp->args[1]) prt("\t******WWWW"); break; case OP_READ: case OP_READ + O_DIRECT: prt("READ%s 0x%x thru 0x%x (0x%x bytes)", lp->operation & O_DIRECT ? "_OD" : " ", lp->args[0], lp->args[0] + lp->args[1] - 1, lp->args[1]); if (badoff >= lp->args[0] && badoff < lp->args[0] + lp->args[1]) prt("\t***RRRR***"); break; case OP_WRITE: case OP_WRITE + O_DIRECT: prt("WRITE%s 0x%x thru 0x%x (0x%x bytes)", lp->operation & O_DIRECT ? "_OD" : " ", lp->args[0], lp->args[0] + lp->args[1] - 1, lp->args[1]); if (lp->args[0] > lp->args[2]) prt(" HOLE"); else if (lp->args[0] + lp->args[1] > lp->args[2]) prt(" EXTEND"); if ((badoff >= lp->args[0] || badoff >=lp->args[2]) && badoff < lp->args[0] + lp->args[1]) prt("\t***WWWW"); break; case OP_TRUNCATE: down = lp->args[0] < lp->args[1]; prt("TRUNCATE %s\tfrom 0x%x to 0x%x", down ? "DOWN" : "UP", lp->args[1], lp->args[0]); if (badoff >= lp->args[!down] && badoff < lp->args[!!down]) prt("\t******WWWW"); break; case OP_CLOSEOPEN: case OP_CLOSEOPEN + O_DIRECT: prt("CLOSE/OPEN%s", lp->operation & O_DIRECT ? "_OD" : " "); break; case OP_SKIPPED: prt("SKIPPED (no operation)"); break; default: prt("BOGUS LOG ENTRY (operation code = %d)!", lp->operation); } prt("\n"); i++; if (i == LOGSIZE) i = 0; } } void save_buffer(char *buffer, off_t bufferlength, int fd) { off_t ret; ssize_t byteswritten; if (fd <= 0 || bufferlength == 0) return; if (bufferlength > INT_MAX) { prt("fsx flaw: overflow in save_buffer\n"); exit(67); } if (lite) { off_t size_by_seek = lseek(fd, (off_t)0, SEEK_END); if (size_by_seek == (off_t)-1) prterr("save_buffer: lseek eof"); else if (bufferlength > size_by_seek) { warn("save_buffer: .fsxgood file too short... will" "save 0x%llx bytes instead of 0x%llx\n", (unsigned long long)size_by_seek, (unsigned long long)bufferlength); bufferlength = size_by_seek; } } ret = lseek(fd, (off_t)0, SEEK_SET); if (ret == (off_t)-1) prterr("save_buffer: lseek 0"); byteswritten = write(fd, buffer, (size_t)bufferlength); if (byteswritten != bufferlength) { if (byteswritten == -1) prterr("save_buffer write"); else warn("save_buffer: short write, 0x%x bytes instead" "of 0x%llx\n", (unsigned)byteswritten, (unsigned long long)bufferlength); } } void report_failure(int status) { logdump(); if (fsxgoodfd) { if (good_buf) { save_buffer(good_buf, file_size, fsxgoodfd); prt("Correct content saved for comparison\n"); prt("(maybe hexdump \"%s\" vs \"%s\")\n", fname, goodfile); } close(fsxgoodfd); } exit(status); } #define short_at(cp) ((unsigned short)((*((unsigned char *)(cp)) << 8) | \ *(((unsigned char *)(cp)) + 1))) void check_buffers(unsigned offset, unsigned size) { unsigned char c, t; unsigned i = 0; unsigned n = 0; unsigned op = 0; unsigned bad = 0; if (memcmp(good_buf + offset, temp_buf, size) != 0) { prt("READ BAD DATA: offset = 0x%x, size = 0x%x\n", offset, size); prt("OFFSET\tGOOD\tBAD\tRANGE\n"); while (size > 0) { c = good_buf[offset]; t = temp_buf[i]; if (c != t) { if (n == 0) { bad = short_at(&temp_buf[i]); prt("%#07x\t%#06x\t%#06x", offset, short_at(&good_buf[offset]), bad); op = temp_buf[offset & 1 ? i+1 : i]; } n++; badoff = offset; } offset++; i++; size--; } if (n) { prt("\t%#7x\n", n); if (bad) prt("operation# (mod 256) for the bad data" "may be %u\n", ((unsigned)op & 0xff)); else prt("operation# (mod 256) for the bad data" "unknown, check HOLE and EXTEND ops\n"); } else prt("????????????????\n"); report_failure(110); } } struct test_file { char *path; int fd; int o_direct; } *test_files = NULL; int num_test_files = 0; enum fd_iteration_policy { FD_SINGLE, FD_ROTATE, FD_RANDOM, }; int fd_policy = FD_RANDOM; int fd_last = 0; struct test_file * get_tf(void) { unsigned index = 0; switch (fd_policy) { case FD_ROTATE: index = fd_last++; break; case FD_RANDOM: index = random(); break; case FD_SINGLE: index = 0; break; default: prt("unknown policy"); exit(1); break; } return &test_files[ index % num_test_files ]; } void assign_fd_policy(char *policy) { if (!strcmp(policy, "random")) fd_policy = FD_RANDOM; else if (!strcmp(policy, "rotate")) fd_policy = FD_ROTATE; else { prt("unknown -I policy: '%s'\n", policy); exit(1); } } int get_fd(void) { struct test_file *tf = get_tf(); return tf->fd; } static const char *my_basename(const char *path) { char *c = strrchr(path, '/'); return c ? c++ : path; } int do_fallocate(int fd, int mode, loff_t offset, loff_t length) { #ifdef FALLOC_FL_KEEP_SIZE return fallocate(fd, mode, offset, length); #else #define FALLOC_FL_KEEP_SIZE 0x01 #if defined(__x86_64__) #define __NR_fallocate 285 #elif defined(__i386__) #define __NR_fallocate 324 #elif defined(__powerpc__) #define __NR_fallocate 309 #elif defined(__s390__) #define __NR_fallocate 314 #else errno = ENOSYS; return -1; #endif #if defined(__x86_64__) || defined(__powerpc64__) || defined(__s390x__) /* 64-bit: pass the 64-bit offset and length arguments directly */ return syscall(__NR_fallocate, fd, mode, offset, length); #elif defined(__i386__) /* 32-bit x86: offset and length are split into high- and low- words * order is offsetLo, offsetHi, lengthLo, lengthHi */ return syscall(__NR_fallocate, fd, mode, (unsigned int)offset, (unsigned int)(offset >> 32), (unsigned int)length, (unsigned int)(length >> 32)); #elif defined(__powerpc__) /* 32-bit PPC: offset and length are split into high- and low- words * order is offsetHi, offsetLo, lengthHi, lengthLo */ return syscall(__NR_fallocate, fd, mode, (unsigned int)(offset >> 32), (unsigned int)offset, (unsigned int)(length >> 32), (unsigned int)length); #elif defined(__s390__) /* 31-bit s390: length is split into high- and low- words, offset not * order is offset, lengthHi, lengthLo */ return syscall(__NR_fallocate, fd, mode, offset, (unsigned int)(length >> 32), (unsigned int)length); #endif #endif /* FALLOC_FL_KEEP_SIZE */ } void open_test_files(char **argv, int argc) { struct test_file *tf; int i; num_test_files = argc; if (num_test_files == 1) fd_policy = FD_SINGLE; test_files = calloc(num_test_files, sizeof(*test_files)); if (test_files == NULL) { prterr("reallocating space for test files"); exit(1); } for (i = 0, tf = test_files; i < num_test_files; i++, tf++) { tf->path = argv[i]; tf->o_direct = (o_direct && (random() % o_direct == 0)) ? O_DIRECT : 0; tf->fd = open(tf->path, O_RDWR | (lite ? 0 : O_CREAT|O_TRUNC) | tf->o_direct, 0666); if (tf->fd < 0) { prterr(tf->path); exit(91); } if (prealloc == 1) { if (do_fallocate(tf->fd, 0, 0, maxfilelen) < 0) { (void)ftruncate(tf->fd, maxfilelen); prt("%s: fallocate(0, %lu): %s\n", tf->path, maxfilelen, strerror(errno)); //exit(89); } } else if (prealloc == 2) { if (do_fallocate(tf->fd, FALLOC_FL_KEEP_SIZE, 0, maxfilelen) < 0){ prt("%s: fallocate(KEEP_SIZE, 0, %lu): %s\n", tf->path, maxfilelen, strerror(errno)); //exit(89); } } } if (quiet || fd_policy == FD_SINGLE) return; for (i = 0, tf = test_files; i < num_test_files; i++, tf++) prt("fd %d: %s\n", i, tf->path); } void close_test_files(void) { int i; struct test_file *tf; for (i = 0, tf = test_files; i < num_test_files; i++, tf++) { if (close(tf->fd)) { prterr("close"); report_failure(99); } } } void check_size(void) { struct stat statbuf; off_t size_by_seek; int fd = get_fd(); if (fstat(fd, &statbuf)) { prterr("check_size: fstat"); statbuf.st_size = -1; } size_by_seek = lseek(fd, (off_t)0, SEEK_END); if (file_size != statbuf.st_size || file_size != size_by_seek) { prt("Size error: expected 0x%llx stat 0x%llx seek 0x%llx\n", (unsigned long long)file_size, (unsigned long long)statbuf.st_size, (unsigned long long)size_by_seek); report_failure(120); } } void check_trunc_hack(void) { struct stat statbuf; int fd = get_fd(); ftruncate(fd, (off_t)0); ftruncate(fd, (off_t)100000); if (fstat(fd, &statbuf)) { prterr("trunc_hack: fstat"); statbuf.st_size = -1; } if (statbuf.st_size != (off_t)100000) { prt("no extend on truncate! not posix!\n"); exit(130); } ftruncate(fd, 0); } static char *tf_buf = NULL; static int max_tf_len = 0; void alloc_tf_buf(void) { char dummy = '\0'; int highest = num_test_files - 1; int len; len = snprintf(&dummy, 0, "%u ", highest); if (len < 1) { prterr("finding max tf_buf"); exit(1); } len++; tf_buf = malloc(len); if (tf_buf == NULL) { prterr("allocating tf_buf"); exit(1); } max_tf_len = snprintf(tf_buf, len, "%u ", highest); if (max_tf_len < 1) { prterr("fiding max_tv_len\n"); exit(1); } if (max_tf_len != len - 1) { warn("snprintf() gave %d instead of %d?\n", max_tf_len, len - 1); exit(1); } } char * fill_tf_buf(struct test_file *tf) { if (tf_buf == NULL) alloc_tf_buf(); sprintf(tf_buf,"%lu ", (unsigned long)(tf - test_files)); return tf_buf; } void output_line(struct test_file *tf, int op, unsigned offset, unsigned size, struct timeval *tv) { char *tf_num = ""; char *ops[] = { [OP_READ] = "read", [OP_WRITE] = "write", [OP_TRUNCATE] = "trunc from", [OP_MAPREAD] = "mapread", [OP_MAPWRITE] = "mapwrite", [OP_READ + O_DIRECT] = "read_OD", [OP_WRITE + O_DIRECT] = "write_OD", }; if (fd_policy != FD_SINGLE) tf_num = fill_tf_buf(tf); /* W. */ if (!(!quiet && ((progressinterval && testcalls % progressinterval == 0) || (debug && (monitorstart == -1 || (offset + size > monitorstart && (monitorend == -1 || offset <= monitorend))))))) return; prt("%06lu %lu.%06lu %.*s%-10s %#08x %s %#08x\t(0x%05x bytes)\n", testcalls, tv->tv_sec, tv->tv_usec, max_tf_len, tf_num, ops[op], offset, op == OP_TRUNCATE ? " to " : "thru", offset + size - 1, (int)size < 0 ? -(int)size : size); } void output_debug(unsigned offset, unsigned size, const char *what) { if (!quiet && (debug > 1 && (monitorstart == -1 || (offset + size >= monitorstart && (monitorend == -1 || offset <= monitorend))))) { struct timeval t; gettimeofday(&t, NULL); prt(" %lu.%06lu %s\n", t.tv_sec, t.tv_usec, what); } } void doread(unsigned offset, unsigned size) { struct timeval t; off_t ret; unsigned iret; struct test_file *tf = get_tf(); int fd = tf->fd; if (tf->o_direct) { offset -= offset % (readbdy == 1 ? page_size : readbdy); size += page_size - size % (readbdy == 1 ? page_size : readbdy); } else { offset -= offset % readbdy; } gettimeofday(&t, NULL); if (size == 0) { if (!quiet && testcalls > simulatedopcount && !tf->o_direct) prt("skipping zero size read\n"); log4(OP_SKIPPED, OP_READ, offset, size, &t); return; } if (size + offset > file_size) { if (!quiet && testcalls > simulatedopcount) prt("skipping seek/read past end of file\n"); log4(OP_SKIPPED, OP_READ, offset, size, &t); return; } log4(OP_READ + tf->o_direct, offset, size, 0, &t); if (testcalls <= simulatedopcount) return; output_line(tf, OP_READ + tf->o_direct, offset, size, &t); ret = lseek(fd, (off_t)offset, SEEK_SET); if (ret == (off_t)-1) { prterr("doread: lseek"); report_failure(140); } iret = read(fd, temp_buf, size); output_debug(offset, size, "read done"); if (iret != size) { if (iret == -1) prterr("doread: read"); else prt("short read: 0x%x bytes instead of 0x%x\n", iret, size); report_failure(141); } check_buffers(offset, size); } void check_eofpage(char *s, unsigned offset, char *p, int size) { long last_page, should_be_zero; if (offset + size <= (file_size & ~page_mask)) return; /* * we landed in the last page of the file * test to make sure the VM system provided 0's * beyond the true end of the file mapping * (as required by mmap def in 1996 posix 1003.1) */ last_page = ((long)p + (offset & page_mask) + size) & ~page_mask; for (should_be_zero = last_page + (file_size & page_mask); should_be_zero < last_page + page_size; should_be_zero++) if (*(char *)should_be_zero) { prt("non-zero mmap past EOF %#llx page @ %#lx is %#x\n", (long long)file_size -1, should_be_zero & page_mask, short_at(should_be_zero)); report_failure(205); } } void domapread(unsigned offset, unsigned size) { struct timeval t; unsigned pg_offset; unsigned map_size; char *p; struct test_file *tf = get_tf(); int fd = tf->fd; if (tf->o_direct) { doread(offset, size); return; } offset -= offset % readbdy; gettimeofday(&t, NULL); if (size == 0) { if (!quiet && testcalls > simulatedopcount) prt("skipping zero size read\n"); log4(OP_SKIPPED, OP_MAPREAD, offset, size, &t); return; } if (size + offset > file_size) { if (!quiet && testcalls > simulatedopcount) prt("skipping seek/read past end of file\n"); log4(OP_SKIPPED, OP_MAPREAD, offset, size, &t); return; } log4(OP_MAPREAD, offset, size, 0, &t); if (testcalls <= simulatedopcount) return; output_line(tf, OP_MAPREAD, offset, size, &t); pg_offset = offset & page_mask; map_size = pg_offset + size; if ((p = mmap(0, map_size, PROT_READ, MAP_FILE | MAP_SHARED, fd, (off_t)(offset - pg_offset))) == MAP_FAILED) { prterr("domapread: mmap"); report_failure(190); } output_debug(offset, size, "mmap done"); if (setjmp(jmpbuf) == 0) { jmpbuf_good = 1; memcpy(temp_buf, p + pg_offset, size); check_eofpage("Read", offset, p, size); jmpbuf_good = 0; } else { report_failure(1901); } output_debug(offset, size, "memcpy done"); if (munmap(p, map_size) != 0) { prterr("domapread: munmap"); report_failure(191); } output_debug(offset, size, "munmap done"); check_buffers(offset, size); } void gendata(char *original_buf, char *good_buf, unsigned offset, unsigned size) { while (size--) { good_buf[offset] = testcalls % 256; if (offset % 2) good_buf[offset] += original_buf[offset]; offset++; } } void dowrite(unsigned offset, unsigned size) { struct timeval t; off_t ret; unsigned iret; struct test_file *tf = get_tf(); int fd = tf->fd; if (tf->o_direct) { offset -= offset % (writebdy == 1 ? page_size : writebdy); size += page_size - (size % (writebdy == 1 ? page_size : writebdy)); } else { offset -= offset % writebdy; } gettimeofday(&t, NULL); if (size == 0) { if (!quiet && testcalls > simulatedopcount && !tf->o_direct) prt("skipping zero size write\n"); log4(OP_SKIPPED, OP_WRITE, offset, size, &t); return; } log4(OP_WRITE + tf->o_direct, offset, size, file_size, &t); gendata(original_buf, good_buf, offset, size); if (file_size < offset + size) { if (file_size < offset) memset(good_buf + file_size, '\0', offset - file_size); file_size = offset + size; if (lite) { warn("Lite file size bug in fsx!"); report_failure(149); } } if (testcalls <= simulatedopcount) return; output_line(tf, OP_WRITE + tf->o_direct, offset, size, &t); ret = lseek(fd, (off_t)offset, SEEK_SET); if (ret == (off_t)-1) { prterr("dowrite: lseek"); report_failure(150); } iret = write(fd, good_buf + offset, size); output_debug(offset, size, "write done"); if (iret != size) { if (iret == -1) prterr("dowrite: write"); else prt("short write: 0x%x bytes instead of 0x%x\n", iret, size); report_failure(151); } if (do_fsync) { if (fsync(fd)) { prt("fsync() failed: %s\n", strerror(errno)); report_failure(152); } output_debug(offset, size, "fsync done"); } } void domapwrite(unsigned offset, unsigned size) { struct timeval t; unsigned pg_offset; unsigned map_size; off_t cur_filesize; char *p; struct test_file *tf = get_tf(); int fd = tf->fd; if (tf->o_direct) { dowrite(offset, size); return; } offset -= offset % writebdy; gettimeofday(&t, NULL); if (size == 0) { if (!quiet && testcalls > simulatedopcount) prt("skipping zero size write\n"); log4(OP_SKIPPED, OP_MAPWRITE, offset, size, &t); return; } cur_filesize = file_size; log4(OP_MAPWRITE, offset, size, 0, &t); gendata(original_buf, good_buf, offset, size); if (file_size < offset + size) { if (file_size < offset) memset(good_buf + file_size, '\0', offset - file_size); file_size = offset + size; if (lite) { warn("Lite file size bug in fsx!"); report_failure(200); } } if (testcalls <= simulatedopcount) return; output_line(tf, OP_MAPWRITE, offset, size, &t); if (file_size > cur_filesize) { if (ftruncate(fd, file_size) == -1) { prterr("domapwrite: ftruncate"); exit(201); } output_debug(offset, size, "truncate done"); } pg_offset = offset & page_mask; map_size = pg_offset + size; if ((p = mmap(0, map_size, PROT_READ | PROT_WRITE, MAP_FILE|MAP_SHARED, fd, (off_t)(offset - pg_offset))) == MAP_FAILED) { prterr("domapwrite: mmap"); report_failure(202); } output_debug(offset, map_size, "mmap done"); if (setjmp(jmpbuf) == 0) { jmpbuf_good = 1; memcpy(p + pg_offset, good_buf + offset, size); if (msync(p, map_size, 0) != 0) { prterr("domapwrite: msync"); report_failure(203); } check_eofpage("Write", offset, p, size); jmpbuf_good = 0; } else { report_failure(2021); } output_debug(offset, size, "memcpy done"); if (msync(p, map_size, 0) != 0) { prterr("domapwrite: msync"); report_failure(203); } output_debug(offset, map_size, "msync done"); if (munmap(p, map_size) != 0) { prterr("domapwrite: munmap"); report_failure(204); } output_debug(offset, map_size, "munmap done"); } void dotruncate(unsigned size) { struct timeval t; int oldsize = file_size; struct test_file *tf = get_tf(); int fd = tf->fd; size -= size % truncbdy; gettimeofday(&t, NULL); if (size > biggest) { biggest = size; if (!quiet && testcalls > simulatedopcount) prt("truncating to largest ever: 0x%x\n", size); } log4(OP_TRUNCATE, size, (unsigned)file_size, 0, &t); if (size > file_size) memset(good_buf + file_size, '\0', size - file_size); file_size = size; if (testcalls <= simulatedopcount) return; output_line(tf, OP_TRUNCATE, oldsize, size - oldsize, &t); if (ftruncate(fd, (off_t)size) == -1) { prt("ftruncate1: %x\n", size); prterr("dotruncate: ftruncate"); report_failure(160); } output_debug(size, 0, "truncate done"); } void writefileimage() { ssize_t iret; int fd = get_fd(); if (lseek(fd, (off_t)0, SEEK_SET) == (off_t)-1) { prterr("writefileimage: lseek"); report_failure(171); } iret = write(fd, good_buf, file_size); if ((off_t)iret != file_size) { if (iret == -1) prterr("writefileimage: write"); else prt("short write: 0x%lx bytes instead of 0x%llx\n", (unsigned long)iret, (unsigned long long)file_size); report_failure(172); } if (lite ? 0 : ftruncate(fd, file_size) == -1) { prt("ftruncate2: %llx\n", (unsigned long long)file_size); prterr("writefileimage: ftruncate"); report_failure(173); } } void docloseopen(void) { struct timeval t; struct test_file *tf = get_tf(); int direct = (o_direct && (random() % o_direct == 0)) ? O_DIRECT : 0; char *tf_num = ""; if (testcalls <= simulatedopcount) return; gettimeofday(&t, NULL); log4(OP_CLOSEOPEN + direct, file_size, (unsigned)file_size, 0, &t); if (fd_policy != FD_SINGLE) tf_num = fill_tf_buf(tf); if (debug) prt("%06lu %lu.%06lu %sclose/open%s\n", testcalls, t.tv_sec, t.tv_usec, tf_num, direct ? "(O_DIRECT)" : ""); if (close(tf->fd)) { prterr(tf->o_direct ? "docloseopen: close(O_DIRECT)" : "docloseopen: close"); report_failure(180); } output_debug(monitorstart, 0, "close done"); tf->o_direct = direct; tf->fd = open(tf->path, O_RDWR | tf->o_direct, 0); if (tf->fd < 0) { prterr(tf->o_direct ? "docloseopen: open(O_DIRECT)" : "docloseopen: open"); report_failure(181); } output_debug(monitorstart, 0, tf->o_direct ? "open done" : "open(O_DIRECT) done"); } void test(void) { unsigned long offset; unsigned long size = maxoplen; unsigned long rv = random(); unsigned long op = rv % (3 + !lite + mapped_writes); /* turn off the map read if necessary */ if (op == 2 && !mapped_reads) op = 0; if (simulatedopcount > 0 && testcalls == simulatedopcount) writefileimage(); testcalls++; if (debugstart > 0 && testcalls >= debugstart) debug = 1; if (!quiet && testcalls < simulatedopcount && testcalls % 100000 == 0) prt("%lu...\n", testcalls); /* * READ: op = 0 * WRITE: op = 1 * MAPREAD: op = 2 * TRUNCATE: op = 3 * MAPWRITE: op = 3 or 4 */ if (lite ? 0 : op == 3 && (style & 1) == 0) /* vanilla truncate? */ dotruncate(random() % maxfilelen); else { if (randomoplen) size = random() % (maxoplen+1); if (lite ? 0 : op == 3) dotruncate(size); else { offset = random(); if (op == 1 || op == (lite ? 3 : 4)) { offset %= maxfilelen; if (offset + size > maxfilelen) size = maxfilelen - offset; if (op != 1) domapwrite(offset, size); else dowrite(offset, size); } else { if (file_size) offset %= file_size; else offset = 0; if (offset + size > file_size) size = file_size - offset; if (op != 0) domapread(offset, size); else doread(offset, size); } } } if (sizechecks && testcalls > simulatedopcount) check_size(); if (closeprob && (rv >> 3) < (1 << 28) / closeprob) docloseopen(); } void segv(int sig) { if (jmpbuf_good) { jmpbuf_good = 0; longjmp(jmpbuf, 1); } report_failure(9999); } void cleanup(sig) int sig; { if (sig) prt("signal %d\n", sig); prt("testcalls = %lu\n", testcalls); exit(sig); } void usage(void) { fprintf(stdout, "usage: fsx [-dfnqLOW] [-b opnum] [-c Prob] [-l flen]\n" "\t\t[-m start:end] [-o oplen] [-p progressinterval] [-r readbdy] [-s style]\n" "\t\t[-t truncbdy] [-w writebdy] [-D startingop] [-N numops] [-P dirpath]\n" "\t\t[-S seed] [-Z [prob]] [ -I random|rotate ] fname [more paths to fname..]\n" " -b opnum: beginning operation number (default 1)\n" " -c P: 1 in P chance of file close+open at each op (default infinity)\n" " -d: debug output for all operations [-d -d = more debugging]\n" /* OSX: -d duration: number of hours for the tool to run\n" */ /* OSX: -e: tests using an extended attribute rather than a file\n" */ " -f: fsync after every write operation\n" /* OSX: -f forkname: test the named fork of fname\n" */ /* OSX: -g logpath: path for .fsxlog file\n" */ /* OSX: -h: write 0s instead of creating holes (i.e. sparse file)\n" */ /* OSX: -i: interactive mode, hit return before performing each operation\n" */ " -l flen: the upper bound on file size (default 262144)\n" /* OSX: -l logpath: path for XILog file\n" */ " -m startop:endop: monitor (print debug output) specified byte rang" "(default 0:infinity)\n" " -n: no verifications of file size\n" " -o oplen: the upper bound on operation size (default 65536)\n" " -p progressinterval: debug output at specified operation interval\n" " -q: quieter operation\n" " -r readbdy: %u would make reads page aligned (default 1)\n" " -s style: 1 gives smaller truncates (default 0)\n" " -t truncbdy: %u would make truncates page aligned (default 1)\n" /* OSX: -v: debug output for all operations\n" */ " -w writebdy: %u would make writes page aligned (default 1)\n" " -x[1|2]: preallocate file space (2 does no size update)\n" /* OSX: -x: write output in XML (XILOG)\n" */ /* OSX: -y: call fsync before closing the file\n" */ /* AKPM:-A: Use the AIO system calls\n" */ /* OSX: -C mix cached and un-cached read/write ops\n" */ " -D startingop: debug output starting at specified operation\n" /* OSX: -F flen: the upper bound on file size (default 262144)\n" */ /* OSX: -G logsize: #entries in oplog (default 1024)\n" */ " -I {rotate|random}: When multiple paths to the file are given,\n" " each operation uses a different path. Iterate through them in\n" " order with 'rotate' or chose then at 'random'. (defaults random)\n" /* OSX: -I: start interactive mode since operation opnum\n" */ " -L: fsxLite - no file creations & no file size changes\n" /* OSX: -M: slow motion mode, wait 1 second before each op\n" */ " -N numops: total # operations to do (default infinity)\n" " -O: use oplen (see -o flag) for every op (default random)\n" " -P: save .fsxlog and .fsxgood files in dirpath (default ./)\n" " -R: read() system calls only (mapped reads disabled)\n" " -S seed: for random # generator (default 1) 0 gets timestamp\n" /* OSX: -T datasize: size of atomic data element writes [1,2,4] (default 4)\n" */ " -W: mapped write operations DISabled\n" " -Z[P]: O_DIRECT file IO [1 in P chance for each open] (default off)\n" " fname: this filename is REQUIRED (no default)\n", page_size, page_size, page_size); exit(90); } int getnum(char *s, char **e) { int ret = -1; *e = (char *) 0; ret = strtol(s, e, 0); if (*e) switch (**e) { case 'b': case 'B': ret *= 512; *e = *e + 1; break; case 'k': case 'K': ret *= 1024; *e = *e + 1; break; case 'm': case 'M': ret *= 1024*1024; *e = *e + 1; break; case 'w': case 'W': ret *= 4; *e = *e + 1; break; } return (ret); } int main(int argc, char **argv) { int i, style, ch; char *orig_good_buf, *orig_temp_buf; char *endp; int dirpath = 0; goodfile[0] = 0; logfile[0] = 0; page_size = getpagesize(); page_mask = page_size - 1; setvbuf(stdout, (char *)0, _IOLBF, 0); /* line buffered stdout */ while ((ch = getopt(argc, argv, "b:c:dfl:m:no:p:qr:s:t:w:x::D:I:LN:OP:RS:WZ::")) != EOF) switch (ch) { case 'b': simulatedopcount = getnum(optarg, &endp); if (!quiet) fprintf(stdout, "Will begin at operation %ld\n", simulatedopcount); if (simulatedopcount == 0) usage(); simulatedopcount -= 1; break; case 'c': closeprob = getnum(optarg, &endp); if (!quiet) fprintf(stdout, "Chance of close/open is 1 in %d\n", closeprob); if (closeprob <= 0) usage(); break; case 'd': debug++; break; case 'f': do_fsync = 1; break; case 'l': maxfilelen = getnum(optarg, &endp); if (maxfilelen <= 0) usage(); break; case 'm': monitorstart = getnum(optarg, &endp); if (monitorstart < 0) usage(); if (!endp || *endp++ != ':') usage(); monitorend = getnum(endp, &endp); if (monitorend < 0) usage(); if (monitorend == 0) monitorend = -1; /* aka infinity */ debug = 1; case 'n': sizechecks = 0; break; case 'o': maxoplen = getnum(optarg, &endp); if (maxoplen <= 0) usage(); break; case 'p': progressinterval = getnum(optarg, &endp); if (progressinterval < 0) usage(); break; case 'q': quiet = 1; break; case 'r': readbdy = getnum(optarg, &endp); if (readbdy <= 0) usage(); break; case 's': style = getnum(optarg, &endp); if (style < 0 || style > 1) usage(); break; case 't': truncbdy = getnum(optarg, &endp); if (truncbdy <= 0) usage(); break; case 'w': writebdy = getnum(optarg, &endp); if (writebdy <= 0) usage(); break; case 'x': if (optarg == NULL || (prealloc = getnum(optarg, &endp)) <= 0) prealloc = 1; break; case 'D': debugstart = getnum(optarg, &endp); if (debugstart < 1) usage(); break; case 'I': assign_fd_policy(optarg); break; case 'L': lite = 1; break; case 'N': numops = getnum(optarg, &endp); if (numops < 0) usage(); break; case 'O': randomoplen = 0; break; case 'P': strncpy(goodfile, optarg, sizeof(goodfile)); strcat(goodfile, "/"); strncpy(logfile, optarg, sizeof(logfile)); strcat(logfile, "/"); dirpath = 1; break; case 'R': mapped_reads = 0; break; case 'S': seed = getnum(optarg, &endp); if (seed == 0) seed = time(0) % 10000; if (!quiet) fprintf(stdout, "Seed set to %d\n", seed); if (seed < 0) usage(); break; case 'W': mapped_writes = 0; if (!quiet) fprintf(stdout, "mapped writes DISABLED\n"); break; case 'Z': if (optarg == NULL || (o_direct = getnum(optarg, &endp)) == 0) o_direct = 1; break; default: usage(); /* NOTREACHED */ } argc -= optind; argv += optind; if (argc < 1) usage(); fname = argv[0]; signal(SIGHUP, cleanup); signal(SIGINT, cleanup); signal(SIGPIPE, cleanup); signal(SIGALRM, cleanup); signal(SIGTERM, cleanup); signal(SIGXCPU, cleanup); signal(SIGXFSZ, cleanup); signal(SIGVTALRM, cleanup); signal(SIGUSR1, cleanup); signal(SIGUSR2, cleanup); signal(SIGSEGV, segv); initstate(seed, state, 256); setstate(state); open_test_files(argv, argc); strncat(goodfile, dirpath ? my_basename(fname) : fname, 256); strcat (goodfile, ".fsxgood"); fsxgoodfd = open(goodfile, O_RDWR|O_CREAT|O_TRUNC, 0666); if (fsxgoodfd < 0) { prterr(goodfile); exit(92); } strncat(logfile, dirpath ? my_basename(fname) : fname, 256); strcat (logfile, ".fsxlog"); fsxlogf = fopen(logfile, "w"); if (fsxlogf == NULL) { prterr(logfile); exit(93); } if (lite) { off_t ret; int fd = get_fd(); file_size = maxfilelen = lseek(fd, (off_t)0, SEEK_END); if (file_size == (off_t)-1) { prterr(fname); warn("main: lseek eof"); exit(94); } ret = lseek(fd, (off_t)0, SEEK_SET); if (ret == (off_t)-1) { prterr(fname); warn("main: lseek 0"); exit(95); } } original_buf = (char *) malloc(maxfilelen); if (original_buf == NULL) exit(96); for (i = 0; i < maxfilelen; i++) original_buf[i] = random() % 256; orig_good_buf = malloc(maxfilelen + page_size); if (orig_good_buf == NULL) exit(97); good_buf = round_up(orig_good_buf, page_size); memset(good_buf, '\0', maxfilelen); orig_temp_buf = malloc(maxoplen + page_size); if (orig_temp_buf == NULL) exit(99); temp_buf = round_up(orig_temp_buf, page_size); memset(temp_buf, '\0', maxoplen); if (lite) { /* zero entire existing file */ ssize_t written; int fd = get_fd(); written = write(fd, good_buf, (size_t)maxfilelen); if (written != maxfilelen) { if (written == -1) { prterr(fname); warn("main: error on write"); } else warn("main: short write, 0x%x bytes instead" "of 0x%x\n", (unsigned)written, maxfilelen); exit(98); } } else { check_trunc_hack(); } while (numops == -1 || numops--) test(); close_test_files(); prt("All operations completed A-OK!\n"); if (tf_buf) free(tf_buf); free(original_buf); free(orig_good_buf); free(orig_temp_buf); return 0; } Cheers, Andreas -- Andreas Dilger Sr. Staff Engineer, Lustre Group Sun Microsystems of Canada, Inc. -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
