/* * Copyright (c) 1982, 1986, 1989, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)file.h 8.3 (Berkeley) 1/9/95 * $FreeBSD: src/sys/sys/file.h,v 1.22.2.7 2002/11/21 23:39:24 sam Exp $ * $DragonFly: src/sys/sys/file.h,v 1.2 2003/06/17 04:28:58 dillon Exp $ */ #ifndef _SYS_FILE_H_ #define _SYS_FILE_H_ #ifndef _KERNEL #include #include #endif #ifdef _KERNEL #include struct stat; struct proc; struct uio; struct knote; /* * Kernel descriptor table. * One entry for each open kernel vnode and socket. */ struct file { LIST_ENTRY(file) f_list;/* list of active files */ short f_FILLER3; /* (old f_flag) */ #define DTYPE_VNODE 1 /* file */ #define DTYPE_SOCKET 2 /* communications endpoint */ #define DTYPE_PIPE 3 /* pipe */ #define DTYPE_FIFO 4 /* fifo (named pipe) */ #define DTYPE_KQUEUE 5 /* event queue */ #define DTYPE_CRYPTO 6 /* crypto */ short f_type; /* descriptor type */ u_int f_flag; /* see fcntl.h */ struct ucred *f_cred; /* credentials associated with descriptor */ struct fileops { int (*fo_read) __P((struct file *fp, struct uio *uio, struct ucred *cred, int flags, struct proc *p)); int (*fo_write) __P((struct file *fp, struct uio *uio, struct ucred *cred, int flags, struct proc *p)); #define FOF_OFFSET 1 int (*fo_ioctl) __P((struct file *fp, u_long com, caddr_t data, struct proc *p)); int (*fo_poll) __P((struct file *fp, int events, struct ucred *cred, struct proc *p)); int (*fo_kqfilter) __P((struct file *fp, struct knote *kn)); int (*fo_stat) __P((struct file *fp, struct stat *sb, struct proc *p)); int (*fo_close) __P((struct file *fp, struct proc *p)); } *f_ops; int f_seqcount; /* * count of sequential accesses -- cleared * by most seek operations. */ off_t f_nextoff; /* * offset of next expected read or write */ off_t f_offset; caddr_t f_data; /* vnode or socket */ int f_count; /* reference count */ int f_msgcount; /* reference count from message queue */ }; #ifdef MALLOC_DECLARE MALLOC_DECLARE(M_FILE); #endif LIST_HEAD(filelist, file); extern struct filelist filehead; /* head of list of open files */ extern struct fileops vnops; extern struct fileops badfileops; extern int maxfiles; /* kernel limit on number of open files */ extern int maxfilesperproc; /* per process limit on number of open files */ extern int nfiles; /* actual number of open files */ static __inline void fhold __P((struct file *fp)); int fdrop __P((struct file *fp, struct proc *p)); static __inline void fhold(fp) struct file *fp; { fp->f_count++; } static __inline int fo_read __P((struct file *fp, struct uio *uio, struct ucred *cred, int flags, struct proc *p)); static __inline int fo_write __P((struct file *fp, struct uio *uio, struct ucred *cred, int flags, struct proc *p)); static __inline int fo_ioctl __P((struct file *fp, u_long com, caddr_t data, struct proc *p)); static __inline int fo_poll __P((struct file *fp, int events, struct ucred *cred, struct proc *p)); static __inline int fo_stat __P((struct file *fp, struct stat *sb, struct proc *p)); static __inline int fo_close __P((struct file *fp, struct proc *p)); static __inline int fo_kqfilter __P((struct file *fp, struct knote *kn)); static __inline int fo_read(fp, uio, cred, flags, p) struct file *fp; struct uio *uio; struct ucred *cred; struct proc *p; int flags; { int error; fhold(fp); error = (*fp->f_ops->fo_read)(fp, uio, cred, flags, p); fdrop(fp, p); return (error); } static __inline int fo_write(fp, uio, cred, flags, p) struct file *fp; struct uio *uio; struct ucred *cred; struct proc *p; int flags; { int error; fhold(fp); error = (*fp->f_ops->fo_write)(fp, uio, cred, flags, p); fdrop(fp, p); return (error); } static __inline int fo_ioctl(fp, com, data, p) struct file *fp; u_long com; caddr_t data; struct proc *p; { int error; fhold(fp); error = (*fp->f_ops->fo_ioctl)(fp, com, data, p); fdrop(fp, p); return (error); } static __inline int fo_poll(fp, events, cred, p) struct file *fp; int events; struct ucred *cred; struct proc *p; { int error; fhold(fp); error = (*fp->f_ops->fo_poll)(fp, events, cred, p); fdrop(fp, p); return (error); } static __inline int fo_stat(fp, sb, p) struct file *fp; struct stat *sb; struct proc *p; { int error; fhold(fp); error = (*fp->f_ops->fo_stat)(fp, sb, p); fdrop(fp, p); return (error); } static __inline int fo_close(fp, p) struct file *fp; struct proc *p; { return ((*fp->f_ops->fo_close)(fp, p)); } static __inline int fo_kqfilter(fp, kn) struct file *fp; struct knote *kn; { return ((*fp->f_ops->fo_kqfilter)(fp, kn)); } #endif /* _KERNEL */ #endif /* !SYS_FILE_H */