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.
183 lines
5.6 KiB
C
183 lines
5.6 KiB
C
/* $NetBSD: linux_hdio.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 <dev/ata/atareg.h>
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#include <dev/ic/wdcreg.h>
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#include <sys/ataio.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_hdio.h>
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#include <compat/linux/linux_syscallargs.h>
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int
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linux_ioctl_hdio(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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int error, error1;
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caddr_t sg;
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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 ataparams *atap, ata;
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struct atareq req;
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struct disklabel label, *labp;
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struct partinfo partp;
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struct linux_hd_geometry hdg;
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struct linux_hd_big_geometry hdg_big;
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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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com = SCARG(uap, com);
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switch (com) {
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case LINUX_HDIO_OBSOLETE_IDENTITY:
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case LINUX_HDIO_GET_IDENTITY:
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sg = stackgap_init(p->p_emul);
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atap = stackgap_alloc(&sg, DEV_BSIZE);
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if (atap == NULL) {
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error = ENOMEM;
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break;
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}
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req.flags = ATACMD_READ;
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req.command = WDCC_IDENTIFY;
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req.databuf = (caddr_t)atap;
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req.datalen = DEV_BSIZE;
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req.timeout = 1000;
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error = ioctlf(fp, ATAIOCCOMMAND, (caddr_t)&req, p);
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if (error != 0)
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break;
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if (req.retsts != ATACMD_OK)
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return EIO;
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error = copyin(atap, &ata, sizeof ata);
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if (error != 0)
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break;
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/*
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* 142 is the size of the old structure used by Linux,
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* which doesn't seem to be defined anywhere anymore.
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*/
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error = copyout(&ata, SCARG(uap, data),
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com == LINUX_HDIO_GET_IDENTITY ? sizeof ata : 142);
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break;
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case LINUX_HDIO_GETGEO:
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error = linux_machdepioctl(p, uap, retval);
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if (error == 0)
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break;
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error = ioctlf(fp, DIOCGDEFLABEL, (caddr_t)&label, p);
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error1 = ioctlf(fp, DIOCGPART, (caddr_t)&partp, p);
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if (error != 0 && error1 != 0) {
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error = error1;
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break;
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}
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labp = error != 0 ? &label : partp.disklab;
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hdg.start = error1 != 0 ? partp.part->p_offset : 0;
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hdg.heads = labp->d_ntracks;
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hdg.cylinders = labp->d_ncylinders;
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hdg.sectors = labp->d_nsectors;
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error = copyout(&hdg, SCARG(uap, data), sizeof hdg);
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break;
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case LINUX_HDIO_GETGEO_BIG:
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error = linux_machdepioctl(p, uap, retval);
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if (error == 0)
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break;
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case LINUX_HDIO_GETGEO_BIG_RAW:
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error = ioctlf(fp, DIOCGDEFLABEL, (caddr_t)&label, p);
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error1 = ioctlf(fp, DIOCGPART, (caddr_t)&partp, p);
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if (error != 0 && error1 != 0) {
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error = error1;
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break;
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}
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labp = error != 0 ? &label : partp.disklab;
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hdg_big.start = error1 != 0 ? partp.part->p_offset : 0;
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hdg_big.heads = labp->d_ntracks;
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hdg_big.cylinders = labp->d_ncylinders;
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hdg_big.sectors = labp->d_nsectors;
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error = copyout(&hdg_big, SCARG(uap, data), sizeof hdg_big);
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break;
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case LINUX_HDIO_GET_UNMASKINTR:
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case LINUX_HDIO_GET_MULTCOUNT:
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case LINUX_HDIO_GET_KEEPSETTINGS:
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case LINUX_HDIO_GET_32BIT:
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case LINUX_HDIO_GET_NOWERR:
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case LINUX_HDIO_GET_DMA:
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case LINUX_HDIO_GET_NICE:
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case LINUX_HDIO_DRIVE_RESET:
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case LINUX_HDIO_TRISTATE_HWIF:
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case LINUX_HDIO_DRIVE_TASK:
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case LINUX_HDIO_DRIVE_CMD:
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case LINUX_HDIO_SET_MULTCOUNT:
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case LINUX_HDIO_SET_UNMASKINTR:
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case LINUX_HDIO_SET_KEEPSETTINGS:
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case LINUX_HDIO_SET_32BIT:
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case LINUX_HDIO_SET_NOWERR:
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case LINUX_HDIO_SET_DMA:
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case LINUX_HDIO_SET_PIO_MODE:
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case LINUX_HDIO_SCAN_HWIF:
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case LINUX_HDIO_SET_NICE:
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case LINUX_HDIO_UNREGISTER_HWIF:
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error = EINVAL;
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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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