2fe8fb192f
There is important information about booting non-ack images in docs/UPDATING. ack/aout-format images can't be built any more, and booting clang/ELF-format ones is a little different. Updating to the new boot monitor is recommended. Changes in this commit: . drop boot monitor -> allowing dropping ack support . facility to copy ELF boot files to /boot so that old boot monitor can still boot fairly easily, see UPDATING . no more ack-format libraries -> single-case libraries . some cleanup of OBJECT_FMT, COMPILER_TYPE, etc cases . drop several ack toolchain commands, but not all support commands (e.g. aal is gone but acksize is not yet). . a few libc files moved to netbsd libc dir . new /bin/date as minix date used code in libc/ . test compile fix . harmonize includes . /usr/lib is no longer special: without ack, /usr/lib plays no kind of special bootstrapping role any more and bootstrapping is done exclusively through packages, so releases depend even less on the state of the machine making them now. . rename nbsd_lib* to lib* . reduce mtree
170 lines
6.7 KiB
C
170 lines
6.7 KiB
C
/* $NetBSD: file.h,v 1.71 2009/12/24 19:01:12 elad Exp $ */
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/*-
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* Copyright (c) 2009 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Andrew Doran.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Copyright (c) 1982, 1986, 1989, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)file.h 8.3 (Berkeley) 1/9/95
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*/
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#ifndef _SYS_FILE_H_
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#define _SYS_FILE_H_
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#include <sys/fcntl.h>
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#include <sys/unistd.h>
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#ifdef _KERNEL
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#include <sys/mallocvar.h>
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#include <sys/queue.h>
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#include <sys/mutex.h>
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#include <sys/condvar.h>
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struct proc;
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struct lwp;
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struct uio;
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struct iovec;
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struct stat;
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struct knote;
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/*
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* Kernel file descriptor. One entry for each open kernel vnode and
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* socket.
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*
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* This structure is exported via the KERN_FILE and KERN_FILE2 sysctl
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* calls. Only add members to the end, do not delete them.
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*/
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struct file {
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off_t f_offset; /* first, is 64-bit */
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kauth_cred_t f_cred; /* creds associated with descriptor */
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const struct fileops {
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int (*fo_read) (struct file *, off_t *, struct uio *,
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kauth_cred_t, int);
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int (*fo_write) (struct file *, off_t *, struct uio *,
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kauth_cred_t, int);
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int (*fo_ioctl) (struct file *, u_long, void *);
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int (*fo_fcntl) (struct file *, u_int, void *);
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int (*fo_poll) (struct file *, int);
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int (*fo_stat) (struct file *, struct stat *);
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int (*fo_close) (struct file *);
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int (*fo_kqfilter) (struct file *, struct knote *);
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void (*fo_restart) (struct file *);
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void (*fo_spare1) (void);
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void (*fo_spare2) (void);
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} *f_ops;
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void *f_data; /* descriptor data, e.g. vnode/socket */
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LIST_ENTRY(file) f_list; /* list of active files */
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kmutex_t f_lock; /* lock on structure */
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int f_flag; /* see fcntl.h */
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u_int f_marker; /* traversal marker (sysctl) */
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#define DTYPE_VNODE 1 /* file */
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#define DTYPE_SOCKET 2 /* communications endpoint */
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#define DTYPE_PIPE 3 /* pipe */
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#define DTYPE_KQUEUE 4 /* event queue */
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#define DTYPE_MISC 5 /* misc file descriptor type */
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#define DTYPE_CRYPTO 6 /* crypto */
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#define DTYPE_MQUEUE 7 /* message queue */
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#define DTYPE_NAMES \
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"0", "file", "socket", "pipe", "kqueue", "misc", "crypto", "mqueue"
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u_int f_type; /* descriptor type */
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u_int f_advice; /* access pattern hint; UVM_ADV_* */
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u_int f_count; /* reference count */
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u_int f_msgcount; /* references from message queue */
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u_int f_unpcount; /* deferred close: see uipc_usrreq.c */
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SLIST_ENTRY(file) f_unplist; /* deferred close: see uipc_usrreq.c */
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};
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/*
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* Flags for fo_read and fo_write and do_fileread/write/v
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*/
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#define FOF_UPDATE_OFFSET 0x0001 /* update the file offset */
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#define FOF_IOV_SYSSPACE 0x0100 /* iov structure in kernel memory */
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LIST_HEAD(filelist, file);
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extern struct filelist filehead; /* head of list of open files */
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extern u_int maxfiles; /* kernel limit on # of open files */
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extern u_int nfiles; /* actual number of open files */
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extern const struct fileops vnops; /* vnode operations for files */
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int dofileread(int, struct file *, void *, size_t,
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off_t *, int, register_t *);
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int dofilewrite(int, struct file *, const void *,
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size_t, off_t *, int, register_t *);
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int do_filereadv(int, const struct iovec *, int, off_t *,
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int, register_t *);
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int do_filewritev(int, const struct iovec *, int, off_t *,
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int, register_t *);
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int fsetown(pid_t *, u_long, const void *);
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int fgetown(pid_t, u_long, void *);
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void fownsignal(pid_t, int, int, int, void *);
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/* Commonly used fileops */
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int fnullop_fcntl(struct file *, u_int, void *);
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int fnullop_poll(struct file *, int);
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int fnullop_kqfilter(struct file *, struct knote *);
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int fbadop_read(struct file *, off_t *, struct uio *, kauth_cred_t, int);
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int fbadop_write(struct file *, off_t *, struct uio *, kauth_cred_t, int);
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int fbadop_ioctl(struct file *, u_long, void *);
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int fbadop_close(struct file *);
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int fbadop_stat(struct file *, struct stat *);
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void fnullop_restart(struct file *);
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#endif /* _KERNEL */
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#endif /* _SYS_FILE_H_ */
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