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.
123 lines
3.8 KiB
C
123 lines
3.8 KiB
C
/* $NetBSD: linux_blkio.c,v 1.4 2001/06/14 20:32:43 thorpej Exp $ */
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/*
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* Copyright (c) 2001 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/syscallargs.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_blkio.h>
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#include <compat/linux/linux_syscallargs.h>
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int
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linux_ioctl_blkio(struct proc *p, struct linux_sys_ioctl_args *uap,
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register_t *retval)
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{
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u_long com;
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long size;
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int error;
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struct filedesc *fdp;
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struct file *fp;
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int (*ioctlf) __P((struct file *, u_long, caddr_t, struct proc *));
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struct partinfo partp;
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struct disklabel label;
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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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error = 0;
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ioctlf = fp->f_ops->fo_ioctl;
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com = SCARG(uap, com);
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switch (com) {
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case LINUX_BLKGETSIZE:
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/*
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* Try to get the partition size of this device. If that
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* fails, it may be a disk without label; try to get
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* the default label and compute the size from it.
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*/
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error = ioctlf(fp, DIOCGPART, (caddr_t)&partp, p);
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if (error != 0) {
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error = ioctlf(fp, DIOCGDEFLABEL, (caddr_t)&label, p);
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if (error != 0)
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break;
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size = label.d_nsectors * label.d_ntracks *
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label.d_ncylinders;
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} else
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size = partp.part->p_size;
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error = copyout(&size, SCARG(uap, data), sizeof size);
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break;
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case LINUX_BLKSECTGET:
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error = ioctlf(fp, DIOCGDEFLABEL, (caddr_t)&label, p);
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if (error != 0)
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break;
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error = copyout(&label.d_secsize, SCARG(uap, data),
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sizeof label.d_secsize);
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break;
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case LINUX_BLKROSET:
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case LINUX_BLKROGET:
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case LINUX_BLKRRPART:
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case LINUX_BLKFLSBUF:
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case LINUX_BLKRASET:
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case LINUX_BLKRAGET:
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case LINUX_BLKFRASET:
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case LINUX_BLKFRAGET:
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case LINUX_BLKSECTSET:
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case LINUX_BLKSSZGET:
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case LINUX_BLKPG:
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default:
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error = ENOTTY;
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}
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FILE_UNUSE(fp, p);
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return error;
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}
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