1 /* $NetBSD: linux_blkio.c,v 1.18 2015/12/08 20:36:14 christos Exp $ */
2
3 /*
4 * Copyright (c) 2001 Wasabi Systems, Inc.
5 * All rights reserved.
6 *
7 * Written by Frank van der Linden for Wasabi Systems, Inc.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 * must display the following acknowledgement:
19 * This product includes software developed for the NetBSD Project by
20 * Wasabi Systems, Inc.
21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse
22 * or promote products derived from this software without specific prior
23 * written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
35 * POSSIBILITY OF SUCH DAMAGE.
36 */
37
38 #include <sys/cdefs.h>
39 __KERNEL_RCSID(0, "$NetBSD: linux_blkio.c,v 1.18 2015/12/08 20:36:14 christos Exp $");
40
41 #include <sys/param.h>
42 #include <sys/systm.h>
43 #include <sys/ioctl.h>
44 #include <sys/file.h>
45 #include <sys/filedesc.h>
46 #include <sys/mount.h>
47 #include <sys/proc.h>
48 #include <sys/disklabel.h>
49
50 #include <sys/syscallargs.h>
51
52 #include <compat/linux/common/linux_types.h>
53 #include <compat/linux/common/linux_ioctl.h>
54 #include <compat/linux/common/linux_signal.h>
55 #include <compat/linux/common/linux_util.h>
56 #include <compat/linux/common/linux_blkio.h>
57 #include <compat/linux/common/linux_ipc.h>
58 #include <compat/linux/common/linux_sem.h>
59
60 #include <compat/linux/linux_syscallargs.h>
61
62 int
linux_ioctl_blkio(struct lwp * l,const struct linux_sys_ioctl_args * uap,register_t * retval)63 linux_ioctl_blkio(struct lwp *l, const struct linux_sys_ioctl_args *uap,
64 register_t *retval)
65 {
66 u_long com;
67 long size;
68 int error;
69 file_t *fp;
70 int (*ioctlf)(file_t *, u_long, void *);
71 struct partinfo pi;
72 struct disklabel label;
73
74 if ((fp = fd_getfile(SCARG(uap, fd))) == NULL)
75 return (EBADF);
76
77 error = 0;
78 ioctlf = fp->f_ops->fo_ioctl;
79 com = SCARG(uap, com);
80
81 switch (com) {
82 case LINUX_BLKGETSIZE:
83 /*
84 * Try to get the partition size of this device. If that
85 * fails, it may be a disk without label; try to get
86 * the default label and compute the size from it.
87 */
88 error = ioctlf(fp, DIOCGPARTINFO, &pi);
89 if (error != 0) {
90 error = ioctlf(fp, DIOCGDINFO, &label);
91 if (error != 0)
92 break;
93 size = label.d_nsectors * label.d_ntracks *
94 label.d_ncylinders;
95 } else
96 size = pi.pi_size;
97 error = copyout(&size, SCARG(uap, data), sizeof size);
98 break;
99 case LINUX_BLKSECTGET:
100 error = ioctlf(fp, DIOCGDINFO, &label);
101 if (error != 0)
102 break;
103 error = copyout(&label.d_secsize, SCARG(uap, data),
104 sizeof label.d_secsize);
105 break;
106 case LINUX_BLKROSET:
107 case LINUX_BLKROGET:
108 case LINUX_BLKRRPART:
109 case LINUX_BLKFLSBUF:
110 case LINUX_BLKRASET:
111 case LINUX_BLKRAGET:
112 case LINUX_BLKFRASET:
113 case LINUX_BLKFRAGET:
114 case LINUX_BLKSECTSET:
115 case LINUX_BLKSSZGET:
116 case LINUX_BLKPG:
117 default:
118 error = ENOTTY;
119 }
120
121 fd_putfile(SCARG(uap, fd));
122
123 return error;
124 }
125