80cc38a1af
between creation of a file descriptor and close(2) when using kernel assisted threads. What we do is stick descriptors in the table, but mark them as "larval". This causes essentially everything to treat it as a non-existent descriptor, except for fdalloc(), which sees a filled slot so that it won't (incorrectly) allocate it again. When a descriptor is fully constructed, the code that has constructed it marks it as "mature" (which actually clears the "larval" flag), and things continue to work as normal. While here, gather all the code that gets a descriptor from the table into a fd_getfile() function, and call it, rather than having the same (sometimes incorrect) code copied all over the place.
171 lines
4.9 KiB
C
171 lines
4.9 KiB
C
/* $NetBSD: linux_fdio.c,v 1.2 2001/06/14 20:32:43 thorpej Exp $ */
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/*
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* Copyright (c) 2000 Wasabi Systems, Inc.
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* All rights reserved.
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*
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* Written by Frank van der Linden for Wasabi Systems, Inc.
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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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed for the NetBSD Project by
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* Wasabi Systems, Inc.
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* 4. The name of Wasabi Systems, Inc. may not be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
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* 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 WASABI SYSTEMS, INC
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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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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/ioctl.h>
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#include <sys/file.h>
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#include <sys/filedesc.h>
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#include <sys/mount.h>
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#include <sys/proc.h>
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#include <sys/disklabel.h>
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#include <sys/fdio.h>
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#include <sys/syscallargs.h>
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#include <dev/isa/fdreg.h>
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#include <compat/linux/common/linux_types.h>
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#include <compat/linux/common/linux_ioctl.h>
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#include <compat/linux/common/linux_signal.h>
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#include <compat/linux/common/linux_util.h>
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#include <compat/linux/common/linux_fdio.h>
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#include <compat/linux/linux_syscallargs.h>
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int
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linux_ioctl_fdio(struct proc *p, struct linux_sys_ioctl_args *uap,
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register_t *retval)
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{
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struct filedesc *fdp;
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struct file *fp;
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int error;
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int (*ioctlf) __P((struct file *, u_long, caddr_t, struct proc *));
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u_long com;
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struct fdformat_parms fparams;
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struct linux_floppy_struct lflop;
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struct linux_floppy_drive_struct ldrive;
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com = (u_long)SCARG(uap, data);
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fdp = p->p_fd;
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if ((fp = fd_getfile(fdp, SCARG(uap, fd))) == NULL)
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return (EBADF);
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FILE_USE(fp);
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com = SCARG(uap, com);
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ioctlf = fp->f_ops->fo_ioctl;
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retval[0] = error = 0;
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switch (com) {
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case LINUX_FDMSGON:
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case LINUX_FDMSGOFF:
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case LINUX_FDTWADDLE:
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case LINUX_FDCLRPRM:
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/* whatever you say */
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break;
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case LINUX_FDPOLLDRVSTAT:
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/*
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* Just fill in some innocent defaults.
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*/
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memset(&ldrive, 0, sizeof ldrive);
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ldrive.fd_ref = 1;
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ldrive.maxblock = 2;
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ldrive.maxtrack = ldrive.track = 1;
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ldrive.flags = LINUX_FD_DISK_WRITABLE;
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error = copyout(&ldrive, SCARG(uap, data), sizeof ldrive);
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break;
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case LINUX_FDGETPRM:
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error = ioctlf(fp, FDIOCGETFORMAT, (caddr_t)&fparams, p);
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if (error != 0)
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break;
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lflop.size = fparams.ncyl * fparams.nspt * fparams.ntrk;
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lflop.sect = fparams.nspt;
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lflop.head = fparams.ntrk;
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lflop.track = fparams.ncyl;
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lflop.stretch = fparams.stepspercyl == 2 ? 1 : 0;
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lflop.fmt_gap = fparams.gaplen;
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/*
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* XXXX Use knowledge of floppy for these fields.
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* FDIOCGETFORMAT does not provide enough information.
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* It would be better to have FDIOCGETFORMAT return more
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* information.
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*/
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switch (fparams.xfer_rate) {
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case 500 * 1024:
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lflop.spec1 = 0xcf;
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lflop.gap = 0x1b;
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lflop.rate = FDC_500KBPS;
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break;
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case 300 * 1024:
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lflop.spec1 = 0xdf;
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lflop.gap = 0x23;
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lflop.rate = FDC_300KBPS;
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break;
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case 250 * 1024:
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lflop.spec1 = 0xdf;
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lflop.gap = 0x2a;
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lflop.rate = FDC_250KBPS;
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break;
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}
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error = copyout(&lflop, SCARG(uap, data), sizeof lflop);
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break;
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case LINUX_FDSETPRM:
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/*
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* Should use FDIOCSETFORMAT here, iff its interface
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* is extended.
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*/
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case LINUX_FDDEFPRM:
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case LINUX_FDFMTBEG:
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case LINUX_FDFMTTRK:
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case LINUX_FDFMTEND:
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case LINUX_FDSETEMSGTRESH:
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case LINUX_FDFLUSH:
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case LINUX_FDSETMAXERRS:
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case LINUX_FDGETMAXERRS:
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case LINUX_FDGETDRVTYP:
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case LINUX_FDSETDRVPRM:
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case LINUX_FDGETDRVPRM:
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case LINUX_FDGETDRVSTAT:
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case LINUX_FDRESET:
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case LINUX_FDGETFDCSTAT:
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case LINUX_FDWERRORCLR:
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case LINUX_FDWERRORGET:
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case LINUX_FDRAWCMD:
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case LINUX_FDEJECT:
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default:
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error = EINVAL;
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}
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FILE_UNUSE(fp, p);
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return 0;
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}
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