+++ /dev/null
-/*
- * This Cplant(TM) source code is the property of Sandia National
- * Laboratories.
- *
- * This Cplant(TM) source code is copyrighted by Sandia National
- * Laboratories.
- *
- * The redistribution of this Cplant(TM) source code is subject to the
- * terms of the GNU Lesser General Public License
- * (see cit/LGPL or http://www.gnu.org/licenses/lgpl.html)
- *
- * Cplant(TM) Copyright 1998-2003 Sandia Corporation.
- * Under the terms of Contract DE-AC04-94AL85000, there is a non-exclusive
- * license for use of this work by or on behalf of the US Government.
- * Export of this program may require a license from the United States
- * Government.
- */
-
-/*
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library 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
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
- * Questions or comments about this library should be sent to:
- *
- * Lee Ward
- * Sandia National Laboratories, New Mexico
- * P.O. Box 5800
- * Albuquerque, NM 87185-1110
- *
- * lee@sandia.gov
- */
-
-#ifdef __linux__
-#define _BSD_SOURCE
-#endif
-
-#include <errno.h>
-#include <stdarg.h>
-#include <sys/syscall.h>
-#include <unistd.h>
-#include <fcntl.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <sys/queue.h>
-
-#include "sysio.h"
-#include "xtio.h"
-#include "native.h"
-#include "inode.h"
-#include "dev.h"
-
-#include "stdfd.h"
-
-#ifdef CPLANT_YOD
-#include <sys/statfs.h>
-#include "cplant-yod.h"
-#define dowrite(f, b, n) write_yod(f, b, n)
-#define doread(f, b, n) read_yod(f, b, n)
-#else
-#define dowrite(f, b, n) syscall(SYSIO_SYS_write, f, b, n)
-#define doread(f, b, n) syscall(SYSIO_SYS_read, f, b, n)
-#endif
-
-/*
- * Pre-opened standard file descriptors driver.
- */
-
-static int stdfd_open(struct pnode *pno, int flags, mode_t mode);
-static int stdfd_close(struct inode *ino);
-static int stdfd_read(struct inode *ino, struct ioctx *ioctx);
-static int stdfd_write(struct inode *ino, struct ioctx *ioctx);
-static int stdfd_iodone(struct ioctx *ioctx);
-static int stdfd_datasync(struct inode *ino);
-static int stdfd_fcntl(struct inode *ino, int cmd, va_list ap, int *rtn);
-static int stdfd_ioctl(struct inode *ino,
- unsigned long int request,
- va_list ap);
-
-int
-_sysio_stdfd_init()
-{
- struct inode_ops stdfd_operations;
-
- stdfd_operations = _sysio_nodev_ops;
- stdfd_operations.inop_open = stdfd_open;
- stdfd_operations.inop_close = stdfd_close;
- stdfd_operations.inop_read = stdfd_read;
- stdfd_operations.inop_write = stdfd_write;
- stdfd_operations.inop_iodone = stdfd_iodone;
- stdfd_operations.inop_fcntl = stdfd_fcntl;
- stdfd_operations.inop_datasync = stdfd_datasync;
- stdfd_operations.inop_ioctl = stdfd_ioctl;
-
- return _sysio_char_dev_register(SYSIO_C_STDFD_MAJOR,
- "stdfd",
- &stdfd_operations);
-}
-
-static int
-stdfd_open(struct pnode *pno __IS_UNUSED,
- int flags __IS_UNUSED,
- mode_t mode __IS_UNUSED)
-{
-
- return 0;
-}
-
-static int
-stdfd_close(struct inode *ino __IS_UNUSED)
-{
-
- return 0;
-}
-
-static int
-doio(ssize_t (*f)(void *, size_t, _SYSIO_OFF_T, struct inode *),
- struct inode *ino,
- struct ioctx *ioctx)
-{
-
- if (ioctx->ioctx_xtvlen != 1) {
- /*
- * No scatter/gather to "file" address space (we're not
- * seekable) and "nowhere" makes no sense.
- */
- return -EINVAL;
- }
- ioctx->ioctx_cc =
- _sysio_doio(ioctx->ioctx_xtv, ioctx->ioctx_xtvlen,
- ioctx->ioctx_iov, ioctx->ioctx_iovlen,
- (ssize_t (*)(void *, size_t, _SYSIO_OFF_T, void *))f,
- ino);
- if (ioctx->ioctx_cc < 0) {
- ioctx->ioctx_errno = -ioctx->ioctx_cc;
- ioctx->ioctx_cc = -1;
- }
- return 0;
-}
-
-static ssize_t
-stdfd_read_simple(void *buf,
- size_t nbytes,
- _SYSIO_OFF_T off __IS_UNUSED,
- struct inode *ino)
-{
- int fd = SYSIO_MINOR_DEV(ino->i_stbuf.st_rdev);
- int cc;
-
- cc = doread(fd, buf, nbytes);
- if (cc < 0)
- cc = -errno;
- return cc;
-}
-
-static int
-stdfd_read(struct inode *ino, struct ioctx *ioctx)
-{
-
- return doio(stdfd_read_simple, ino, ioctx);
-}
-
-static ssize_t
-stdfd_write_simple(const void *buf,
- size_t nbytes,
- _SYSIO_OFF_T off __IS_UNUSED,
- struct inode *ino)
-{
- int fd = SYSIO_MINOR_DEV(ino->i_stbuf.st_rdev);
- int cc;
-
- cc = dowrite(fd, buf, nbytes);
- if (cc < 0)
- cc = -errno;
- return cc;
-}
-
-static int
-stdfd_write(struct inode *ino, struct ioctx *ioctx)
-{
-
- return doio((ssize_t (*)(void *,
- size_t,
- _SYSIO_OFF_T,
- struct inode *))stdfd_write_simple,
- ino,
- ioctx);
-}
-
-static int
-stdfd_iodone(struct ioctx *iocp __IS_UNUSED)
-{
-
- /*
- * It's always done in this driver. It completed when posted.
- */
- return 1;
-}
-
-static int
-stdfd_fcntl(struct inode *ino,
- int cmd,
- va_list ap,
- int *rtn)
-{
- int err;
- int fd = SYSIO_MINOR_DEV(ino->i_stbuf.st_rdev);
- long arg;
-
- err = 0;
- switch (cmd) {
- case F_GETFL:
- *rtn = syscall(SYS_fcntl, fd, cmd);
- if (*rtn == -1)
- err = -errno;
- break;
- case F_SETFL:
- arg = va_arg(ap, long);
- *rtn = syscall(SYS_fcntl, fd, cmd, arg);
- if (*rtn == -1)
- err = -errno;
- va_end(ap);
- break;
- default:
- *rtn = -1;
- err = -EINVAL;
- }
- return err;
-}
-
-static int
-stdfd_datasync(struct inode *ino __IS_UNUSED)
-{
-
- /*
- * We don't buffer, so nothing to do.
- */
- return 0;
-}
-
-static int
-stdfd_ioctl(struct inode *ino __IS_UNUSED,
- unsigned long int request __IS_UNUSED,
- va_list ap __IS_UNUSED)
-{
-
- return -ENOTTY;
-}
git://git.whamcloud.com / fs / lustre-release.git / blobdiff