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 1998-2006 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
49 * Test whether large file support on this file.
52 #define _F_LARGEFILE(fil) \
53 ((fil)->f_flags & O_LARGEFILE)
55 #define _F_LARGEFILE(fil) \
59 * Return max seek value for this file.
61 #define _SEEK_MAX(fil) \
62 (_F_LARGEFILE(fil) ? _SYSIO_OFF_T_MAX : LONG_MAX)
64 #ifdef _LARGEFILE64_SOURCE
65 #define _SYSIO_FLOCK flock64
67 #define _SYSIO_FLOCK flock
71 * A file record is maintained for each open file in the system. It holds
72 * all the info necessary to track the context and parameters for the
73 * operations that may be performed.
76 struct inode *f_ino; /* path node */
77 _SYSIO_OFF_T f_pos; /* current stream pos */
78 unsigned f_ref; /* ref count */
79 int f_flags; /* open/fcntl flags */
83 * Reference a file record.
88 assert((fil)->f_ref); \
92 * Release reference to a file record.
96 assert((fil)->f_ref); \
105 * NB: Don't forget to take a reference to the inode too!
107 #define _SYSIO_FINIT(fil, ino, flags) \
109 (fil)->f_ino = (ino); \
112 (fil)->f_flags = (flags); \
116 * Determine if a file may be read/written.
118 * Given a ptr to an open file table entry and a flag indicating desired
119 * access return non-zero if the file record indicates that the access is
120 * permitted or zero, if not.
122 * 'r' for read access check
123 * 'w' for write access check
126 #define F_CHKRW(_fil, _c) \
127 (((_c) == 'r' && !((_fil)->f_flags & O_WRONLY)) || \
128 ((_c) == 'w' && ((_fil)->f_flags & (O_WRONLY | O_RDWR))))
132 extern struct file *_sysio_fnew(struct inode *ino, int flags);
133 extern void _sysio_fgone(struct file *fil);
134 extern void _sysio_fcompletio(struct ioctx *ioctx, struct file *fil);
135 extern int _sysio_fd_close(int fd);
136 extern struct file *_sysio_fd_find(int fd);
137 extern int _sysio_fd_set(struct file *fil, int fd, int force);
138 extern int _sysio_fd_dup(int oldfd, int newfd, int force);
139 extern int _sysio_fd_close_all(void);
140 #ifdef ZERO_SUM_MEMORY
141 extern void _sysio_fd_shutdown(void);
143 extern _SYSIO_OFF_T _sysio_lseek_prepare(struct file *fil,