442 lines
16 KiB
C
Executable File
442 lines
16 KiB
C
Executable File
/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
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* vim:expandtab:shiftwidth=8:tabstop=8:
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*/
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/******************************************************************************\
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* *
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* Copyright (c) 2003, The Regents of the University of California *
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* See the file COPYRIGHT for a complete copyright notice and license. *
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* *
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********************************************************************************
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*
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* Implement of abstract I/O interface for POSIX.
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*
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\******************************************************************************/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <stdio.h>
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#include <stdlib.h>
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#ifdef __linux__
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# include <sys/ioctl.h> /* necessary for: */
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# define __USE_GNU /* O_DIRECT and */
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# include <fcntl.h> /* IO operations */
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# undef __USE_GNU
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#endif /* __linux__ */
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#include <errno.h>
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#include <fcntl.h> /* IO operations */
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#include <sys/stat.h>
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#include <assert.h>
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#ifdef HAVE_LUSTRE_LUSTRE_USER_H
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# include <lustre/lustre_user.h>
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#endif
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#ifdef HAVE_GPFS_H
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# include <gpfs.h>
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#endif
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#ifdef HAVE_GPFS_FCNTL_H
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# include <gpfs_fcntl.h>
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#endif
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#include "ior.h"
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#include "aiori.h"
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#include "iordef.h"
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#include "utilities.h"
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#ifndef open64 /* necessary for TRU64 -- */
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# define open64 open /* unlikely, but may pose */
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#endif /* not open64 */ /* conflicting prototypes */
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#ifndef lseek64 /* necessary for TRU64 -- */
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# define lseek64 lseek /* unlikely, but may pose */
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#endif /* not lseek64 */ /* conflicting prototypes */
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#ifndef O_BINARY /* Required on Windows */
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# define O_BINARY 0
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#endif
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/**************************** P R O T O T Y P E S *****************************/
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static void *POSIX_Create(char *, IOR_param_t *);
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static void *POSIX_Open(char *, IOR_param_t *);
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static IOR_offset_t POSIX_Xfer(int, void *, IOR_size_t *,
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IOR_offset_t, IOR_param_t *);
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static void POSIX_Close(void *, IOR_param_t *);
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static void POSIX_Delete(char *, IOR_param_t *);
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static void POSIX_SetVersion(IOR_param_t *);
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static void POSIX_Fsync(void *, IOR_param_t *);
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static IOR_offset_t POSIX_GetFileSize(IOR_param_t *, MPI_Comm, char *);
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/************************** D E C L A R A T I O N S ***************************/
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ior_aiori_t posix_aiori = {
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"POSIX",
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POSIX_Create,
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POSIX_Open,
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POSIX_Xfer,
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POSIX_Close,
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POSIX_Delete,
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POSIX_SetVersion,
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POSIX_Fsync,
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POSIX_GetFileSize
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};
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/***************************** F U N C T I O N S ******************************/
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#ifdef HAVE_GPFS_FCNTL_H
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void gpfs_free_all_locks(int fd)
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{
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int rc;
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struct {
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gpfsFcntlHeader_t header;
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gpfsFreeRange_t release;
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} release_all;
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release_all.header.totalLength = sizeof(release_all);
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release_all.header.fcntlVersion = GPFS_FCNTL_CURRENT_VERSION;
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release_all.header.fcntlReserved = 0;
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release_all.release.structLen = sizeof(release_all.release);
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release_all.release.structType = GPFS_FREE_RANGE;
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release_all.release.start = 0;
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release_all.release.length = 0;
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rc = gpfs_fcntl(fd, &release_all);
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if (verbose >= VERBOSE_0 && rc != 0) {
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EWARN("gpfs_fcntl release all locks hint failed.");
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}
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}
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void gpfs_access_start(int fd, IOR_offset_t length, IOR_param_t *param, int access)
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{
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int rc;
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struct {
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gpfsFcntlHeader_t header;
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gpfsAccessRange_t access;
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} take_locks;
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take_locks.header.totalLength = sizeof(take_locks);
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take_locks.header.fcntlVersion = GPFS_FCNTL_CURRENT_VERSION;
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take_locks.header.fcntlReserved = 0;
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take_locks.access.structLen = sizeof(take_locks.access);
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take_locks.access.structType = GPFS_ACCESS_RANGE;
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take_locks.access.start = param->offset;
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take_locks.access.length = length;
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take_locks.access.isWrite = (access == WRITE);
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rc = gpfs_fcntl(fd, &take_locks);
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if (verbose >= VERBOSE_2 && rc != 0) {
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EWARN("gpfs_fcntl access range hint failed.");
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}
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}
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void gpfs_access_end(int fd, IOR_offset_t length, IOR_param_t *param, int access)
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{
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int rc;
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struct {
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gpfsFcntlHeader_t header;
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gpfsFreeRange_t free;
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} free_locks;
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free_locks.header.totalLength = sizeof(free_locks);
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free_locks.header.fcntlVersion = GPFS_FCNTL_CURRENT_VERSION;
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free_locks.header.fcntlReserved = 0;
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free_locks.free.structLen = sizeof(free_locks.free);
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free_locks.free.structType = GPFS_FREE_RANGE;
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free_locks.free.start = param->offset;
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free_locks.free.length = length;
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rc = gpfs_fcntl(fd, &free_locks);
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if (verbose >= VERBOSE_2 && rc != 0) {
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EWARN("gpfs_fcntl free range hint failed.");
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}
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}
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#endif
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/*
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* Creat and open a file through the POSIX interface.
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*/
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static void *POSIX_Create(char *testFileName, IOR_param_t * param)
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{
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int fd_oflag = O_BINARY;
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int *fd;
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fd = (int *)malloc(sizeof(int));
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if (fd == NULL)
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ERR("Unable to malloc file descriptor");
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if (param->useO_DIRECT == TRUE)
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set_o_direct_flag(&fd_oflag);
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#ifdef HAVE_LUSTRE_LUSTRE_USER_H
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if (param->lustre_set_striping) {
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/* In the single-shared-file case, task 0 has to creat the
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file with the Lustre striping options before any other processes
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open the file */
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if (!param->filePerProc && rank != 0) {
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MPI_CHECK(MPI_Barrier(testComm), "barrier error");
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fd_oflag |= O_RDWR;
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*fd = open64(testFileName, fd_oflag, 0664);
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if (*fd < 0)
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ERR("open64() failed");
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} else {
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struct lov_user_md opts = { 0 };
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/* Setup Lustre IOCTL striping pattern structure */
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opts.lmm_magic = LOV_USER_MAGIC;
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opts.lmm_stripe_size = param->lustre_stripe_size;
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opts.lmm_stripe_offset = param->lustre_start_ost;
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opts.lmm_stripe_count = param->lustre_stripe_count;
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/* File needs to be opened O_EXCL because we cannot set
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Lustre striping information on a pre-existing file. */
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fd_oflag |=
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O_CREAT | O_EXCL | O_RDWR | O_LOV_DELAY_CREATE;
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*fd = open64(testFileName, fd_oflag, 0664);
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if (*fd < 0) {
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fprintf(stdout, "\nUnable to open '%s': %s\n",
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testFileName, strerror(errno));
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MPI_CHECK(MPI_Abort(MPI_COMM_WORLD, -1),
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"MPI_Abort() error");
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} else if (ioctl(*fd, LL_IOC_LOV_SETSTRIPE, &opts)) {
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char *errmsg = "stripe already set";
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if (errno != EEXIST && errno != EALREADY)
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errmsg = strerror(errno);
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fprintf(stdout,
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"\nError on ioctl for '%s' (%d): %s\n",
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testFileName, *fd, errmsg);
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MPI_CHECK(MPI_Abort(MPI_COMM_WORLD, -1),
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"MPI_Abort() error");
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}
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if (!param->filePerProc)
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MPI_CHECK(MPI_Barrier(testComm),
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"barrier error");
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}
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} else {
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#endif /* HAVE_LUSTRE_LUSTRE_USER_H */
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fd_oflag |= O_CREAT | O_RDWR;
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*fd = open64(testFileName, fd_oflag, 0664);
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if (*fd < 0)
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ERR("open64() failed");
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#ifdef HAVE_LUSTRE_LUSTRE_USER_H
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}
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if (param->lustre_ignore_locks) {
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int lustre_ioctl_flags = LL_FILE_IGNORE_LOCK;
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if (ioctl(*fd, LL_IOC_SETFLAGS, &lustre_ioctl_flags) == -1)
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ERR("ioctl(LL_IOC_SETFLAGS) failed");
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}
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#endif /* HAVE_LUSTRE_LUSTRE_USER_H */
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#ifdef HAVE_GPFS_FCNTL_H
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/* in the single shared file case, immediately release all locks, with
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* the intent that we can avoid some byte range lock revocation:
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* everyone will be writing/reading from individual regions */
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if (param->gpfs_release_token ) {
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gpfs_free_all_locks(*fd);
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}
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#endif
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return ((void *)fd);
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}
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/*
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* Open a file through the POSIX interface.
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*/
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static void *POSIX_Open(char *testFileName, IOR_param_t * param)
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{
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int fd_oflag = O_BINARY;
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int *fd;
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fd = (int *)malloc(sizeof(int));
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if (fd == NULL)
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ERR("Unable to malloc file descriptor");
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if (param->useO_DIRECT == TRUE)
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set_o_direct_flag(&fd_oflag);
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fd_oflag |= O_RDWR;
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*fd = open64(testFileName, fd_oflag);
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if (*fd < 0)
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ERR("open64 failed");
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#ifdef HAVE_LUSTRE_LUSTRE_USER_H
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if (param->lustre_ignore_locks) {
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int lustre_ioctl_flags = LL_FILE_IGNORE_LOCK;
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if (verbose >= VERBOSE_1) {
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fprintf(stdout,
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"** Disabling lustre range locking **\n");
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}
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if (ioctl(*fd, LL_IOC_SETFLAGS, &lustre_ioctl_flags) == -1)
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ERR("ioctl(LL_IOC_SETFLAGS) failed");
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}
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#endif /* HAVE_LUSTRE_LUSTRE_USER_H */
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#ifdef HAVE_GPFS_FCNTL_H
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if(param->gpfs_release_token) {
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gpfs_free_all_locks(*fd);
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}
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#endif
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return ((void *)fd);
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}
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/*
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* Write or read access to file using the POSIX interface.
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*/
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static IOR_offset_t POSIX_Xfer(int access, void *file, IOR_size_t * buffer,
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IOR_offset_t length, IOR_param_t * param)
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{
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int xferRetries = 0;
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long long remaining = (long long)length;
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char *ptr = (char *)buffer;
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long long rc;
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int fd;
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fd = *(int *)file;
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#ifdef HAVE_GPFS_FCNTL_H
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if (param->gpfs_hint_access) {
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gpfs_access_start(fd, length, param, access);
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}
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#endif
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/* seek to offset */
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if (lseek64(fd, param->offset, SEEK_SET) == -1)
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ERR("lseek64() failed");
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while (remaining > 0) {
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/* write/read file */
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if (access == WRITE) { /* WRITE */
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if (verbose >= VERBOSE_4) {
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fprintf(stdout,
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"task %d writing to offset %lld\n",
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rank,
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param->offset + length - remaining);
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}
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rc = write(fd, ptr, remaining);
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if (rc == -1)
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ERR("write() failed");
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if (param->fsyncPerWrite == TRUE)
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POSIX_Fsync(&fd, param);
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} else { /* READ or CHECK */
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if (verbose >= VERBOSE_4) {
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fprintf(stdout,
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"task %d reading from offset %lld\n",
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rank,
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param->offset + length - remaining);
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}
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rc = read(fd, ptr, remaining);
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if (rc == 0)
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ERR("read() returned EOF prematurely");
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if (rc == -1)
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ERR("read() failed");
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}
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if (rc < remaining) {
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fprintf(stdout,
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"WARNING: Task %d, partial %s, %lld of %lld bytes at offset %lld\n",
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rank,
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access == WRITE ? "write()" : "read()",
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rc, remaining,
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param->offset + length - remaining);
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if (param->singleXferAttempt == TRUE)
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MPI_CHECK(MPI_Abort(MPI_COMM_WORLD, -1),
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"barrier error");
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if (xferRetries > MAX_RETRY)
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ERR("too many retries -- aborting");
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}
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assert(rc >= 0);
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assert(rc <= remaining);
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remaining -= rc;
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ptr += rc;
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xferRetries++;
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}
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#ifdef HAVE_GPFS_FCNTL_H
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if (param->gpfs_hint_access) {
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gpfs_access_end(fd, length, param, access);
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}
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#endif
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return (length);
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}
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/*
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* Perform fsync().
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*/
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static void POSIX_Fsync(void *fd, IOR_param_t * param)
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{
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if (fsync(*(int *)fd) != 0)
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EWARN("fsync() failed");
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}
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/*
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* Close a file through the POSIX interface.
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*/
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static void POSIX_Close(void *fd, IOR_param_t * param)
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{
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if (close(*(int *)fd) != 0)
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ERR("close() failed");
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free(fd);
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}
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/*
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* Delete a file through the POSIX interface.
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*/
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static void POSIX_Delete(char *testFileName, IOR_param_t * param)
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{
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char errmsg[256];
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sprintf(errmsg, "[RANK %03d]: unlink() of file \"%s\" failed\n",
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rank, testFileName);
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if (unlink(testFileName) != 0)
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EWARN(errmsg);
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}
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/*
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* Determine api version.
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*/
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static void POSIX_SetVersion(IOR_param_t * test)
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{
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strcpy(test->apiVersion, test->api);
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}
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/*
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* Use POSIX stat() to return aggregate file size.
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*/
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static IOR_offset_t POSIX_GetFileSize(IOR_param_t * test, MPI_Comm testComm,
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char *testFileName)
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{
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struct stat stat_buf;
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IOR_offset_t aggFileSizeFromStat, tmpMin, tmpMax, tmpSum;
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if (stat(testFileName, &stat_buf) != 0) {
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ERR("stat() failed");
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}
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aggFileSizeFromStat = stat_buf.st_size;
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if (test->filePerProc == TRUE) {
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MPI_CHECK(MPI_Allreduce(&aggFileSizeFromStat, &tmpSum, 1,
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MPI_LONG_LONG_INT, MPI_SUM, testComm),
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"cannot total data moved");
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aggFileSizeFromStat = tmpSum;
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} else {
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MPI_CHECK(MPI_Allreduce(&aggFileSizeFromStat, &tmpMin, 1,
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MPI_LONG_LONG_INT, MPI_MIN, testComm),
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"cannot total data moved");
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MPI_CHECK(MPI_Allreduce(&aggFileSizeFromStat, &tmpMax, 1,
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MPI_LONG_LONG_INT, MPI_MAX, testComm),
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"cannot total data moved");
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if (tmpMin != tmpMax) {
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if (rank == 0) {
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WARN("inconsistent file size by different tasks");
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}
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/* incorrect, but now consistent across tasks */
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aggFileSizeFromStat = tmpMin;
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}
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}
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return (aggFileSizeFromStat);
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}
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