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Annotation of sys/compat/linux/linux_blkio.c, Revision 1.1.1.1

1.1       nbrk        1: /*     $OpenBSD: linux_blkio.c,v 1.7 2007/06/06 17:15:13 deraadt Exp $ */
                      2: /*     $NetBSD: linux_blkio.c,v 1.3 2001/01/18 17:48:04 tv Exp $       */
                      3:
                      4: /*
                      5:  * Copyright (c) 2001 Wasabi Systems, Inc.
                      6:  * All rights reserved.
                      7:  *
                      8:  * Written by Frank van der Linden for Wasabi Systems, Inc.
                      9:  *
                     10:  * Redistribution and use in source and binary forms, with or without
                     11:  * modification, are permitted provided that the following conditions
                     12:  * are met:
                     13:  * 1. Redistributions of source code must retain the above copyright
                     14:  *    notice, this list of conditions and the following disclaimer.
                     15:  * 2. Redistributions in binary form must reproduce the above copyright
                     16:  *    notice, this list of conditions and the following disclaimer in the
                     17:  *    documentation and/or other materials provided with the distribution.
                     18:  * 3. All advertising materials mentioning features or use of this software
                     19:  *    must display the following acknowledgement:
                     20:  *      This product includes software developed for the NetBSD Project by
                     21:  *      Wasabi Systems, Inc.
                     22:  * 4. The name of Wasabi Systems, Inc. may not be used to endorse
                     23:  *    or promote products derived from this software without specific prior
                     24:  *    written permission.
                     25:  *
                     26:  * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
                     27:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
                     28:  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
                     29:  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
                     30:  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
                     31:  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
                     32:  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
                     33:  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
                     34:  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
                     35:  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
                     36:  * POSSIBILITY OF SUCH DAMAGE.
                     37:  */
                     38:
                     39: #include <sys/param.h>
                     40: #include <sys/systm.h>
                     41: #include <sys/ioctl.h>
                     42: #include <sys/file.h>
                     43: #include <sys/filedesc.h>
                     44: #include <sys/mount.h>
                     45: #include <sys/proc.h>
                     46: #include <sys/disklabel.h>
                     47:
                     48: #include <sys/syscallargs.h>
                     49:
                     50: #include <compat/linux/linux_types.h>
                     51: #include <compat/linux/linux_ioctl.h>
                     52: #include <compat/linux/linux_signal.h>
                     53: #include <compat/linux/linux_util.h>
                     54: #include <compat/linux/linux_blkio.h>
                     55:
                     56: #include <compat/linux/linux_syscallargs.h>
                     57:
                     58: int
                     59: linux_ioctl_blkio(struct proc *p, struct linux_sys_ioctl_args *uap,
                     60:                  register_t *retval)
                     61: {
                     62:        u_long com;
                     63:        long size;
                     64:        int error;
                     65:        struct filedesc *fdp;
                     66:        struct file *fp;
                     67:        int (*ioctlf)(struct file *, u_long, caddr_t, struct proc *);
                     68:        struct partinfo partp;
                     69:        struct disklabel label;
                     70:
                     71:         fdp = p->p_fd;
                     72:        if ((fp = fd_getfile(fdp, SCARG(uap, fd))) == NULL)
                     73:                return (EBADF);
                     74:        FREF(fp);
                     75:        error = 0;
                     76:        ioctlf = fp->f_ops->fo_ioctl;
                     77:        com = SCARG(uap, com);
                     78:
                     79:        switch (com) {
                     80:        case LINUX_BLKGETSIZE:
                     81:                /*
                     82:                 * Try to get the partition size of this device. If that
                     83:                 * fails, it may be a disk without label; try to get
                     84:                 * the default label and compute the size from it.
                     85:                 */
                     86:                error = ioctlf(fp, DIOCGPART, (caddr_t)&partp, p);
                     87:                if (error != 0) {
                     88:                        error = ioctlf(fp, DIOCGDINFO, (caddr_t)&label, p);
                     89:                        if (error != 0)
                     90:                                break;
                     91:                        size = label.d_nsectors * label.d_ntracks *
                     92:                            label.d_ncylinders;
                     93:                } else
                     94:                        /* XXX ignores > 32bit blocks */
                     95:                        size = DL_GETPSIZE(partp.part);
                     96:                error = copyout(&size, SCARG(uap, data), sizeof size);
                     97:                break;
                     98:        case LINUX_BLKSECTGET:
                     99:                error = ioctlf(fp, DIOCGDINFO, (caddr_t)&label, p);
                    100:                if (error != 0)
                    101:                        break;
                    102:                error = copyout(&label.d_secsize, SCARG(uap, data),
                    103:                    sizeof label.d_secsize);
                    104:                break;
                    105:        case LINUX_BLKROSET:
                    106:        case LINUX_BLKROGET:
                    107:        case LINUX_BLKRRPART:
                    108:        case LINUX_BLKFLSBUF:
                    109:        case LINUX_BLKRASET:
                    110:        case LINUX_BLKRAGET:
                    111:        case LINUX_BLKFRASET:
                    112:        case LINUX_BLKFRAGET:
                    113:        case LINUX_BLKSECTSET:
                    114:        case LINUX_BLKSSZGET:
                    115:        case LINUX_BLKPG:
                    116:        default:
                    117:                error = ENOTTY;
                    118:        }
                    119:
                    120:        FRELE(fp);
                    121:        return error;
                    122: }