2 * This Cplant(TM) source code is the property of Sandia National
5 * This Cplant(TM) source code is copyrighted by Sandia National
8 * The redistribution of this Cplant(TM) source code is subject to the
9 * terms of the GNU Lesser General Public License
10 * (see cit/LGPL or http://www.gnu.org/licenses/lgpl.html)
12 * Cplant(TM) Copyright 1998-2003 Sandia Corporation.
13 * Under the terms of Contract DE-AC04-94AL85000, there is a non-exclusive
14 * license for use of this work by or on behalf of the US Government.
15 * Export of this program may require a license from the United States
20 * This library is free software; you can redistribute it and/or
21 * modify it under the terms of the GNU Lesser General Public
22 * License as published by the Free Software Foundation; either
23 * version 2.1 of the License, or (at your option) any later version.
25 * This library is distributed in the hope that it will be useful,
26 * but WITHOUT ANY WARRANTY; without even the implied warranty of
27 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
28 * Lesser General Public License for more details.
30 * You should have received a copy of the GNU Lesser General Public
31 * License along with this library; if not, write to the Free Software
32 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
34 * Questions or comments about this library should be sent to:
37 * Sandia National Laboratories, New Mexico
39 * Albuquerque, NM 87185-1110
50 #include <sys/syscall.h>
53 #include <sys/types.h>
55 #include <sys/queue.h>
66 #include <sys/statfs.h>
67 #include "cplant-yod.h"
68 #define dowrite(f, b, n) write_yod(f, b, n)
69 #define doread(f, b, n) read_yod(f, b, n)
71 #define dowrite(f, b, n) syscall(SYSIO_SYS_write, f, b, n)
72 #define doread(f, b, n) syscall(SYSIO_SYS_read, f, b, n)
76 * Pre-opened standard file descriptors driver.
79 static int stdfd_open(struct pnode *pno, int flags, mode_t mode);
80 static int stdfd_close(struct inode *ino);
81 static int stdfd_read(struct inode *ino, struct ioctx *ioctx);
82 static int stdfd_write(struct inode *ino, struct ioctx *ioctx);
83 static int stdfd_iodone(struct ioctx *ioctx);
84 static int stdfd_datasync(struct inode *ino);
85 static int stdfd_fcntl(struct inode *ino, int cmd, va_list ap, int *rtn);
86 static int stdfd_ioctl(struct inode *ino,
87 unsigned long int request,
93 struct inode_ops stdfd_operations;
95 stdfd_operations = _sysio_nodev_ops;
96 stdfd_operations.inop_open = stdfd_open;
97 stdfd_operations.inop_close = stdfd_close;
98 stdfd_operations.inop_read = stdfd_read;
99 stdfd_operations.inop_write = stdfd_write;
100 stdfd_operations.inop_iodone = stdfd_iodone;
101 stdfd_operations.inop_fcntl = stdfd_fcntl;
102 stdfd_operations.inop_datasync = stdfd_datasync;
103 stdfd_operations.inop_ioctl = stdfd_ioctl;
105 return _sysio_char_dev_register(SYSIO_C_STDFD_MAJOR,
111 stdfd_open(struct pnode *pno __IS_UNUSED,
112 int flags __IS_UNUSED,
113 mode_t mode __IS_UNUSED)
120 stdfd_close(struct inode *ino __IS_UNUSED)
127 doio(ssize_t (*f)(void *, size_t, _SYSIO_OFF_T, struct inode *),
132 if (ioctx->ioctx_xtvlen != 1) {
134 * No scatter/gather to "file" address space (we're not
135 * seekable) and "nowhere" makes no sense.
140 _sysio_doio(ioctx->ioctx_xtv, ioctx->ioctx_xtvlen,
141 ioctx->ioctx_iov, ioctx->ioctx_iovlen,
142 (ssize_t (*)(void *, size_t, _SYSIO_OFF_T, void *))f,
144 if (ioctx->ioctx_cc < 0) {
145 ioctx->ioctx_errno = -ioctx->ioctx_cc;
146 ioctx->ioctx_cc = -1;
152 stdfd_read_simple(void *buf,
154 _SYSIO_OFF_T off __IS_UNUSED,
157 int fd = SYSIO_MINOR_DEV(ino->i_stbuf.st_rdev);
160 cc = doread(fd, buf, nbytes);
167 stdfd_read(struct inode *ino, struct ioctx *ioctx)
170 return doio(stdfd_read_simple, ino, ioctx);
174 stdfd_write_simple(const void *buf,
176 _SYSIO_OFF_T off __IS_UNUSED,
179 int fd = SYSIO_MINOR_DEV(ino->i_stbuf.st_rdev);
182 cc = dowrite(fd, buf, nbytes);
189 stdfd_write(struct inode *ino, struct ioctx *ioctx)
192 return doio((ssize_t (*)(void *,
195 struct inode *))stdfd_write_simple,
201 stdfd_iodone(struct ioctx *iocp __IS_UNUSED)
205 * It's always done in this driver. It completed when posted.
211 stdfd_fcntl(struct inode *ino,
217 int fd = SYSIO_MINOR_DEV(ino->i_stbuf.st_rdev);
223 *rtn = syscall(SYS_fcntl, fd, cmd);
228 arg = va_arg(ap, long);
229 *rtn = syscall(SYS_fcntl, fd, cmd, arg);
242 stdfd_datasync(struct inode *ino __IS_UNUSED)
246 * We don't buffer, so nothing to do.
252 stdfd_ioctl(struct inode *ino __IS_UNUSED,
253 unsigned long int request __IS_UNUSED,
254 va_list ap __IS_UNUSED)