1 /* $NetBSD: linux_ioctl.c,v 1.58 2014/03/23 06:03:38 dholland Exp $ */ 2 3 /*- 4 * Copyright (c) 1995, 1998, 2008 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Frank van der Linden and Eric Haszlakiewicz. 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 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: linux_ioctl.c,v 1.58 2014/03/23 06:03:38 dholland Exp $"); 34 35 #if defined(_KERNEL_OPT) 36 #include "sequencer.h" 37 #endif 38 39 #include <sys/param.h> 40 #include <sys/proc.h> 41 #include <sys/systm.h> 42 #include <sys/conf.h> 43 #include <sys/ioctl.h> 44 #include <sys/mount.h> 45 #include <sys/file.h> 46 #include <sys/vnode.h> 47 #include <sys/filedesc.h> 48 49 #include <sys/socket.h> 50 #include <net/if.h> 51 #include <sys/sockio.h> 52 53 #include <sys/syscallargs.h> 54 55 #include <compat/linux/common/linux_types.h> 56 #include <compat/linux/common/linux_signal.h> 57 #include <compat/linux/common/linux_ioctl.h> 58 #include <compat/linux/common/linux_ipc.h> 59 #include <compat/linux/common/linux_sem.h> 60 61 #include <compat/linux/linux_syscallargs.h> 62 63 #include <compat/ossaudio/ossaudio.h> 64 #define LINUX_TO_OSS(v) ((const void *)(v)) /* do nothing, same ioctl() encoding */ 65 66 #include <dev/ic/mfiio.h> 67 #define LINUX_MEGARAID_CMD _LINUX_IOWR('M', 1, struct mfi_ioc_packet) 68 #define LINUX_MEGARAID_GET_AEN _LINUX_IOW('M', 3, struct mfi_ioc_aen) 69 70 /* 71 * Most ioctl command are just converted to their NetBSD values, 72 * and passed on. The ones that take structure pointers and (flag) 73 * values need some massaging. 74 */ 75 int 76 linux_sys_ioctl(struct lwp *l, const struct linux_sys_ioctl_args *uap, register_t *retval) 77 { 78 /* { 79 syscallarg(int) fd; 80 syscallarg(u_long) com; 81 syscallarg(void *) data; 82 } */ 83 int error; 84 85 switch (LINUX_IOCGROUP(SCARG(uap, com))) { 86 case 'M': 87 switch(SCARG(uap, com)) { 88 case LINUX_MEGARAID_CMD: 89 case LINUX_MEGARAID_GET_AEN: 90 { 91 struct sys_ioctl_args ua; 92 u_long com = 0; 93 if (SCARG(uap, com) & IOC_IN) 94 com |= IOC_OUT; 95 if (SCARG(uap, com) & IOC_OUT) 96 com |= IOC_IN; 97 SCARG(&ua, fd) = SCARG(uap, fd); 98 SCARG(&ua, com) = SCARG(uap, com); 99 SCARG(&ua, com) &= ~IOC_DIRMASK; 100 SCARG(&ua, com) |= com; 101 SCARG(&ua, data) = SCARG(uap, data); 102 error = sys_ioctl(l, (const void *)&ua, retval); 103 break; 104 } 105 default: 106 error = oss_ioctl_mixer(l, LINUX_TO_OSS(uap), retval); 107 break; 108 } 109 break; 110 case 'Q': 111 error = oss_ioctl_sequencer(l, LINUX_TO_OSS(uap), retval); 112 break; 113 case 'P': 114 error = oss_ioctl_audio(l, LINUX_TO_OSS(uap), retval); 115 break; 116 case 'V': /* video4linux2 */ 117 case 'd': /* drm */ 118 { 119 struct sys_ioctl_args ua; 120 u_long com = 0; 121 if (SCARG(uap, com) & IOC_IN) 122 com |= IOC_OUT; 123 if (SCARG(uap, com) & IOC_OUT) 124 com |= IOC_IN; 125 SCARG(&ua, fd) = SCARG(uap, fd); 126 SCARG(&ua, com) = SCARG(uap, com); 127 SCARG(&ua, com) &= ~IOC_DIRMASK; 128 SCARG(&ua, com) |= com; 129 SCARG(&ua, data) = SCARG(uap, data); 130 error = sys_ioctl(l, (const void *)&ua, retval); 131 break; 132 } 133 case 'r': /* VFAT ioctls; not yet supported */ 134 error = ENOSYS; 135 break; 136 case 'S': 137 error = linux_ioctl_cdrom(l, uap, retval); 138 break; 139 case 't': 140 case 'f': 141 error = linux_ioctl_termios(l, uap, retval); 142 break; 143 case 'm': 144 error = linux_ioctl_mtio(l, uap, retval); 145 break; 146 case 'T': 147 { 148 #if NSEQUENCER > 0 149 /* XXX XAX 2x check this. */ 150 /* 151 * Both termios and the MIDI sequencer use 'T' to identify 152 * the ioctl, so we have to differentiate them in another 153 * way. We do it by indexing in the cdevsw with the major 154 * device number and check if that is the sequencer entry. 155 */ 156 bool is_sequencer = false; 157 struct file *fp; 158 struct vnode *vp; 159 struct vattr va; 160 extern const struct cdevsw sequencer_cdevsw; 161 162 if ((fp = fd_getfile(SCARG(uap, fd))) == NULL) 163 return EBADF; 164 if (fp->f_type == DTYPE_VNODE && 165 (vp = (struct vnode *)fp->f_data) != NULL && 166 vp->v_type == VCHR) { 167 vn_lock(vp, LK_SHARED | LK_RETRY); 168 error = VOP_GETATTR(vp, &va, l->l_cred); 169 VOP_UNLOCK(vp); 170 if (error == 0 && 171 cdevsw_lookup(va.va_rdev) == &sequencer_cdevsw) 172 is_sequencer = true; 173 } 174 if (is_sequencer) { 175 error = oss_ioctl_sequencer(l, (const void *)LINUX_TO_OSS(uap), 176 retval); 177 } 178 else { 179 error = linux_ioctl_termios(l, uap, retval); 180 } 181 fd_putfile(SCARG(uap, fd)); 182 #else 183 error = linux_ioctl_termios(l, uap, retval); 184 #endif 185 } 186 break; 187 case '"': 188 error = linux_ioctl_sg(l, uap, retval); 189 break; 190 case 0x89: 191 error = linux_ioctl_socket(l, uap, retval); 192 break; 193 case 0x03: 194 error = linux_ioctl_hdio(l, uap, retval); 195 break; 196 case 0x02: 197 error = linux_ioctl_fdio(l, uap, retval); 198 break; 199 case 0x12: 200 error = linux_ioctl_blkio(l, uap, retval); 201 break; 202 default: 203 error = linux_machdepioctl(l, uap, retval); 204 break; 205 } 206 if (error == EPASSTHROUGH) { 207 /* 208 * linux returns EINVAL or ENOTTY for not supported ioctls. 209 */ 210 error = EINVAL; 211 } 212 213 return error; 214 } 215