| | 1 | /* |
| | 2 | * Copyright (c) 1982, 1986, 1989, 1993 |
| | 3 | * The Regents of the University of California. All rights reserved. |
| | 4 | * |
| | 5 | * Redistribution and use in source and binary forms, with or without |
| | 6 | * modification, are permitted provided that the following conditions |
| | 7 | * are met: |
| | 8 | * 1. Redistributions of source code must retain the above copyright |
| | 9 | * notice, this list of conditions and the following disclaimer. |
| | 10 | * 2. Redistributions in binary form must reproduce the above copyright |
| | 11 | * notice, this list of conditions and the following disclaimer in the |
| | 12 | * documentation and/or other materials provided with the distribution. |
| | 13 | * 3. All advertising materials mentioning features or use of this software |
| | 14 | * must display the following acknowledgement: |
| | 15 | * This product includes software developed by the University of |
| | 16 | * California, Berkeley and its contributors. |
| | 17 | * 4. Neither the name of the University nor the names of its contributors |
| | 18 | * may be used to endorse or promote products derived from this software |
| | 19 | * without specific prior written permission. |
| | 20 | * |
| | 21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| | 22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| | 23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| | 24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| | 25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| | 26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| | 27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| | 28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| | 29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| | 30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| | 31 | * SUCH DAMAGE. |
| | 32 | * |
| | 33 | * @(#)file.h 8.3 (Berkeley) 1/9/95 |
| | 34 | * $FreeBSD: src/sys/sys/file.h,v 1.22.2.7 2002/11/21 23:39:24 sam Exp $ |
| | 35 | * $DragonFly: src/sys/sys/file.h,v 1.3 2003/06/25 03:56:10 dillon Exp $ |
| | 36 | */ |
| | 37 | |
| | 38 | #ifndef _SYS_FILE_H_ |
| | 39 | #define _SYS_FILE_H_ |
| | 40 | |
| | 41 | #ifndef _KERNEL |
| | 42 | #include <sys/fcntl.h> |
| | 43 | #include <sys/unistd.h> |
| | 44 | #endif |
| | 45 | |
| | 46 | #ifdef _KERNEL |
| | 47 | #include <sys/queue.h> |
| | 48 | |
| | 49 | struct stat; |
| | 50 | struct proc; |
| | 51 | struct thread; |
| | 52 | struct uio; |
| | 53 | struct knote; |
| | 54 | |
| | 55 | /* |
| | 56 | * Kernel descriptor table. |
| | 57 | * One entry for each open kernel vnode and socket. |
| | 58 | */ |
| | 59 | struct file { |
| | 60 | LIST_ENTRY(file) f_list;/* list of active files */ |
| | 61 | short f_FILLER3; /* (old f_flag) */ |
| | 62 | #define DTYPE_VNODE 1 /* file */ |
| | 63 | #define DTYPE_SOCKET 2 /* communications endpoint */ |
| | 64 | #define DTYPE_PIPE 3 /* pipe */ |
| | 65 | #define DTYPE_FIFO 4 /* fifo (named pipe) */ |
| | 66 | #define DTYPE_KQUEUE 5 /* event queue */ |
| | 67 | #define DTYPE_CRYPTO 6 /* crypto */ |
| | 68 | short f_type; /* descriptor type */ |
| | 69 | u_int f_flag; /* see fcntl.h */ |
| | 70 | struct ucred *f_cred; /* credentials associated with descriptor */ |
| | 71 | struct fileops { |
| | 72 | int (*fo_read) __P((struct file *fp, struct uio *uio, |
| | 73 | struct ucred *cred, int flags, |
| | 74 | struct thread *td)); |
| | 75 | int (*fo_write) __P((struct file *fp, struct uio *uio, |
| | 76 | struct ucred *cred, int flags, |
| | 77 | struct thread *td)); |
| | 78 | #define FOF_OFFSET 1 |
| | 79 | int (*fo_ioctl) __P((struct file *fp, u_long com, |
| | 80 | caddr_t data, struct thread *td)); |
| | 81 | int (*fo_poll) __P((struct file *fp, int events, |
| | 82 | struct ucred *cred, struct thread *td)); |
| | 83 | int (*fo_kqfilter) __P((struct file *fp, |
| | 84 | struct knote *kn)); |
| | 85 | int (*fo_stat) __P((struct file *fp, struct stat *sb, |
| | 86 | struct thread *td)); |
| | 87 | int (*fo_close) __P((struct file *fp, struct thread *td)); |
| | 88 | } *f_ops; |
| | 89 | int f_seqcount; /* |
| | 90 | * count of sequential accesses -- cleared |
| | 91 | * by most seek operations. |
| | 92 | */ |
| | 93 | off_t f_nextoff; /* |
| | 94 | * offset of next expected read or write |
| | 95 | */ |
| | 96 | off_t f_offset; |
| | 97 | caddr_t f_data; /* vnode or socket */ |
| | 98 | int f_count; /* reference count */ |
| | 99 | int f_msgcount; /* reference count from message queue */ |
| | 100 | }; |
| | 101 | |
| | 102 | #ifdef MALLOC_DECLARE |
| | 103 | MALLOC_DECLARE(M_FILE); |
| | 104 | #endif |
| | 105 | |
| | 106 | extern int fdrop __P((struct file *fp, struct thread *td)); |
| | 107 | |
| | 108 | LIST_HEAD(filelist, file); |
| | 109 | extern struct filelist filehead; /* head of list of open files */ |
| | 110 | extern struct fileops vnops; |
| | 111 | extern struct fileops badfileops; |
| | 112 | extern int maxfiles; /* kernel limit on number of open files */ |
| | 113 | extern int maxfilesperproc; /* per process limit on number of open files */ |
| | 114 | extern int nfiles; /* actual number of open files */ |
| | 115 | |
| | 116 | #endif /* _KERNEL */ |
| | 117 | |
| | 118 | #endif /* !SYS_FILE_H */ |
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