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Annotation of sys/compat/linux/linux_blkio.c, Revision 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: }