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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.
143 lines
4.7 KiB
C
143 lines
4.7 KiB
C
/* $NetBSD: linux_ioctl.c,v 1.27 2001/06/14 20:32:43 thorpej Exp $ */
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/*-
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* Copyright (c) 1995, 1998 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 Frank van der Linden and Eric Haszlakiewicz.
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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 by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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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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#if defined(_KERNEL_OPT)
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#include "sequencer.h"
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#endif
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#include <sys/param.h>
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#include <sys/proc.h>
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#include <sys/systm.h>
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#include <sys/conf.h>
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#include <sys/ioctl.h>
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#include <sys/mount.h>
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#include <sys/file.h>
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#include <sys/vnode.h>
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#include <sys/filedesc.h>
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#include <sys/socket.h>
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#include <net/if.h>
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#include <sys/sockio.h>
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#include <sys/syscallargs.h>
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#include <compat/linux/common/linux_types.h>
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#include <compat/linux/common/linux_signal.h>
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#include <compat/linux/common/linux_ioctl.h>
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#include <compat/linux/linux_syscallargs.h>
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#include <compat/ossaudio/ossaudio.h>
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#define LINUX_TO_OSS(v) (v) /* do nothing, same ioctl() encoding */
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/*
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* Most ioctl command are just converted to their NetBSD values,
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* and passed on. The ones that take structure pointers and (flag)
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* values need some massaging. This is done the usual way by
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* allocating stackgap memory, letting the actual ioctl call do its
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* work there and converting back the data afterwards.
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*/
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int
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linux_sys_ioctl(p, v, retval)
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struct proc *p;
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void *v;
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register_t *retval;
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{
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struct linux_sys_ioctl_args /* {
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syscallarg(int) fd;
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syscallarg(u_long) com;
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syscallarg(caddr_t) data;
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} */ *uap = v;
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switch (LINUX_IOCGROUP(SCARG(uap, com))) {
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case 'M':
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return oss_ioctl_mixer(p, LINUX_TO_OSS(v), retval);
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case 'Q':
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return oss_ioctl_sequencer(p, LINUX_TO_OSS(v), retval);
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case 'P':
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return oss_ioctl_audio(p, LINUX_TO_OSS(v), retval);
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case 'S':
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return linux_ioctl_cdrom(p, uap, retval);
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case 't':
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case 'f':
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return linux_ioctl_termios(p, uap, retval);
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case 'T':
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{
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#if NSEQUENCER > 0
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/* XXX XAX 2x check this. */
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/*
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* Both termios and the MIDI sequncer use 'T' to identify
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* the ioctl, so we have to differentiate them in another
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* way. We do it by indexing in the cdevsw with the major
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* device number and check if that is the sequencer entry.
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*/
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struct file *fp;
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struct filedesc *fdp;
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struct vnode *vp;
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struct vattr va;
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extern int sequencerioctl
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__P((dev_t, u_long, caddr_t, int, struct proc *));
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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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if (fp->f_type == DTYPE_VNODE &&
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(vp = (struct vnode *)fp->f_data) != NULL &&
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vp->v_type == VCHR &&
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VOP_GETATTR(vp, &va, p->p_ucred, p) == 0 &&
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major(va.va_rdev) < nchrdev &&
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cdevsw[major(va.va_rdev)].d_ioctl == &sequencerioctl)
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return oss_ioctl_sequencer(p, (void*)LINUX_TO_OSS(uap),
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retval);
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else
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#endif
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return linux_ioctl_termios(p, uap, retval);
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}
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case 0x89:
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return linux_ioctl_socket(p, uap, retval);
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case 0x03:
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return linux_ioctl_hdio(p, uap, retval);
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case 0x02:
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return linux_ioctl_fdio(p, uap, retval);
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case 0x12:
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return linux_ioctl_blkio(p, uap, retval);
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default:
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return linux_machdepioctl(p, uap, retval);
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}
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}
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