David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 1 | /* |
Ian Abbott | 0a87c0e | 2015-01-27 18:26:55 +0000 | [diff] [blame] | 2 | * comedi/comedi_compat32.c |
| 3 | * 32-bit ioctl compatibility for 64-bit comedi kernel module. |
| 4 | * |
| 5 | * Author: Ian Abbott, MEV Ltd. <abbotti@mev.co.uk> |
| 6 | * Copyright (C) 2007 MEV Ltd. <http://www.mev.co.uk/> |
| 7 | * |
| 8 | * COMEDI - Linux Control and Measurement Device Interface |
| 9 | * Copyright (C) 1997-2007 David A. Schleef <ds@schleef.org> |
| 10 | * |
| 11 | * This program is free software; you can redistribute it and/or modify |
| 12 | * it under the terms of the GNU General Public License as published by |
| 13 | * the Free Software Foundation; either version 2 of the License, or |
| 14 | * (at your option) any later version. |
| 15 | * |
| 16 | * This program is distributed in the hope that it will be useful, |
| 17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 19 | * GNU General Public License for more details. |
| 20 | */ |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 21 | |
Shane Warden | f366243 | 2009-09-22 16:13:02 -0700 | [diff] [blame] | 22 | #include <linux/uaccess.h> |
Ian Abbott | 00d20c6 | 2012-06-19 10:58:16 +0100 | [diff] [blame] | 23 | #include <linux/compat.h> |
| 24 | #include <linux/fs.h> |
Greg Kroah-Hartman | 3b6b25b | 2010-05-03 15:50:09 -0700 | [diff] [blame] | 25 | #include "comedi.h" |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 26 | #include "comedi_compat32.h" |
| 27 | |
Greg Kroah-Hartman | 0191492 | 2009-03-20 21:34:38 -0700 | [diff] [blame] | 28 | #define COMEDI32_CHANINFO _IOR(CIO, 3, struct comedi32_chaninfo_struct) |
| 29 | #define COMEDI32_RANGEINFO _IOR(CIO, 8, struct comedi32_rangeinfo_struct) |
Ian Abbott | 79b09aa | 2015-01-27 18:16:54 +0000 | [diff] [blame] | 30 | /* |
| 31 | * N.B. COMEDI32_CMD and COMEDI_CMD ought to use _IOWR, not _IOR. |
| 32 | * It's too late to change it now, but it only affects the command number. |
| 33 | */ |
Greg Kroah-Hartman | 0191492 | 2009-03-20 21:34:38 -0700 | [diff] [blame] | 34 | #define COMEDI32_CMD _IOR(CIO, 9, struct comedi32_cmd_struct) |
Ian Abbott | 79b09aa | 2015-01-27 18:16:54 +0000 | [diff] [blame] | 35 | /* |
| 36 | * N.B. COMEDI32_CMDTEST and COMEDI_CMDTEST ought to use _IOWR, not _IOR. |
| 37 | * It's too late to change it now, but it only affects the command number. |
| 38 | */ |
Greg Kroah-Hartman | 0191492 | 2009-03-20 21:34:38 -0700 | [diff] [blame] | 39 | #define COMEDI32_CMDTEST _IOR(CIO, 10, struct comedi32_cmd_struct) |
| 40 | #define COMEDI32_INSNLIST _IOR(CIO, 11, struct comedi32_insnlist_struct) |
| 41 | #define COMEDI32_INSN _IOR(CIO, 12, struct comedi32_insn_struct) |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 42 | |
Bill Pemberton | bf8db92e | 2009-03-16 22:04:29 -0400 | [diff] [blame] | 43 | struct comedi32_chaninfo_struct { |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 44 | unsigned int subdev; |
Bill Pemberton | 790c554 | 2009-03-16 22:05:02 -0400 | [diff] [blame] | 45 | compat_uptr_t maxdata_list; /* 32-bit 'unsigned int *' */ |
Ian Abbott | 0ec1488 | 2015-01-27 18:16:55 +0000 | [diff] [blame] | 46 | compat_uptr_t flaglist; /* 32-bit 'unsigned int *' */ |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 47 | compat_uptr_t rangelist; /* 32-bit 'unsigned int *' */ |
| 48 | unsigned int unused[4]; |
Bill Pemberton | bf8db92e | 2009-03-16 22:04:29 -0400 | [diff] [blame] | 49 | }; |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 50 | |
Bill Pemberton | bf8db92e | 2009-03-16 22:04:29 -0400 | [diff] [blame] | 51 | struct comedi32_rangeinfo_struct { |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 52 | unsigned int range_type; |
| 53 | compat_uptr_t range_ptr; /* 32-bit 'void *' */ |
Bill Pemberton | bf8db92e | 2009-03-16 22:04:29 -0400 | [diff] [blame] | 54 | }; |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 55 | |
Bill Pemberton | bf8db92e | 2009-03-16 22:04:29 -0400 | [diff] [blame] | 56 | struct comedi32_cmd_struct { |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 57 | unsigned int subdev; |
| 58 | unsigned int flags; |
| 59 | unsigned int start_src; |
| 60 | unsigned int start_arg; |
| 61 | unsigned int scan_begin_src; |
| 62 | unsigned int scan_begin_arg; |
| 63 | unsigned int convert_src; |
| 64 | unsigned int convert_arg; |
| 65 | unsigned int scan_end_src; |
| 66 | unsigned int scan_end_arg; |
| 67 | unsigned int stop_src; |
| 68 | unsigned int stop_arg; |
Ian Abbott | 0ec1488 | 2015-01-27 18:16:55 +0000 | [diff] [blame] | 69 | compat_uptr_t chanlist; /* 32-bit 'unsigned int *' */ |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 70 | unsigned int chanlist_len; |
Ian Abbott | 0ec1488 | 2015-01-27 18:16:55 +0000 | [diff] [blame] | 71 | compat_uptr_t data; /* 32-bit 'short *' */ |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 72 | unsigned int data_len; |
Bill Pemberton | bf8db92e | 2009-03-16 22:04:29 -0400 | [diff] [blame] | 73 | }; |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 74 | |
Bill Pemberton | bf8db92e | 2009-03-16 22:04:29 -0400 | [diff] [blame] | 75 | struct comedi32_insn_struct { |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 76 | unsigned int insn; |
| 77 | unsigned int n; |
Ian Abbott | 0ec1488 | 2015-01-27 18:16:55 +0000 | [diff] [blame] | 78 | compat_uptr_t data; /* 32-bit 'unsigned int *' */ |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 79 | unsigned int subdev; |
| 80 | unsigned int chanspec; |
| 81 | unsigned int unused[3]; |
Bill Pemberton | bf8db92e | 2009-03-16 22:04:29 -0400 | [diff] [blame] | 82 | }; |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 83 | |
Bill Pemberton | bf8db92e | 2009-03-16 22:04:29 -0400 | [diff] [blame] | 84 | struct comedi32_insnlist_struct { |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 85 | unsigned int n_insns; |
Ian Abbott | 0ec1488 | 2015-01-27 18:16:55 +0000 | [diff] [blame] | 86 | compat_uptr_t insns; /* 32-bit 'struct comedi_insn *' */ |
Bill Pemberton | bf8db92e | 2009-03-16 22:04:29 -0400 | [diff] [blame] | 87 | }; |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 88 | |
| 89 | /* Handle translated ioctl. */ |
| 90 | static int translated_ioctl(struct file *file, unsigned int cmd, |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame] | 91 | unsigned long arg) |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 92 | { |
Shawn Bohrer | a6279bc | 2009-10-18 15:32:17 -0500 | [diff] [blame] | 93 | if (file->f_op->unlocked_ioctl) |
| 94 | return file->f_op->unlocked_ioctl(file, cmd, arg); |
| 95 | |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 96 | return -ENOTTY; |
| 97 | } |
| 98 | |
| 99 | /* Handle 32-bit COMEDI_CHANINFO ioctl. */ |
| 100 | static int compat_chaninfo(struct file *file, unsigned long arg) |
| 101 | { |
Greg Kroah-Hartman | 0191492 | 2009-03-20 21:34:38 -0700 | [diff] [blame] | 102 | struct comedi_chaninfo __user *chaninfo; |
Bill Pemberton | bf8db92e | 2009-03-16 22:04:29 -0400 | [diff] [blame] | 103 | struct comedi32_chaninfo_struct __user *chaninfo32; |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 104 | int err; |
| 105 | union { |
| 106 | unsigned int uint; |
| 107 | compat_uptr_t uptr; |
| 108 | } temp; |
| 109 | |
| 110 | chaninfo32 = compat_ptr(arg); |
| 111 | chaninfo = compat_alloc_user_space(sizeof(*chaninfo)); |
| 112 | |
| 113 | /* Copy chaninfo structure. Ignore unused members. */ |
H Hartley Sweeten | 1d746c6 | 2014-07-18 14:28:10 -0700 | [diff] [blame] | 114 | if (!access_ok(VERIFY_READ, chaninfo32, sizeof(*chaninfo32)) || |
| 115 | !access_ok(VERIFY_WRITE, chaninfo, sizeof(*chaninfo))) |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 116 | return -EFAULT; |
H Hartley Sweeten | 1d746c6 | 2014-07-18 14:28:10 -0700 | [diff] [blame] | 117 | |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 118 | err = 0; |
| 119 | err |= __get_user(temp.uint, &chaninfo32->subdev); |
| 120 | err |= __put_user(temp.uint, &chaninfo->subdev); |
| 121 | err |= __get_user(temp.uptr, &chaninfo32->maxdata_list); |
| 122 | err |= __put_user(compat_ptr(temp.uptr), &chaninfo->maxdata_list); |
| 123 | err |= __get_user(temp.uptr, &chaninfo32->flaglist); |
| 124 | err |= __put_user(compat_ptr(temp.uptr), &chaninfo->flaglist); |
| 125 | err |= __get_user(temp.uptr, &chaninfo32->rangelist); |
| 126 | err |= __put_user(compat_ptr(temp.uptr), &chaninfo->rangelist); |
Bill Pemberton | 82675f3 | 2009-03-16 22:04:23 -0400 | [diff] [blame] | 127 | if (err) |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 128 | return -EFAULT; |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 129 | |
| 130 | return translated_ioctl(file, COMEDI_CHANINFO, (unsigned long)chaninfo); |
| 131 | } |
| 132 | |
| 133 | /* Handle 32-bit COMEDI_RANGEINFO ioctl. */ |
| 134 | static int compat_rangeinfo(struct file *file, unsigned long arg) |
| 135 | { |
Bill Pemberton | d0a353f | 2009-03-16 22:06:26 -0400 | [diff] [blame] | 136 | struct comedi_rangeinfo __user *rangeinfo; |
Bill Pemberton | bf8db92e | 2009-03-16 22:04:29 -0400 | [diff] [blame] | 137 | struct comedi32_rangeinfo_struct __user *rangeinfo32; |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 138 | int err; |
| 139 | union { |
| 140 | unsigned int uint; |
| 141 | compat_uptr_t uptr; |
| 142 | } temp; |
| 143 | |
| 144 | rangeinfo32 = compat_ptr(arg); |
| 145 | rangeinfo = compat_alloc_user_space(sizeof(*rangeinfo)); |
| 146 | |
| 147 | /* Copy rangeinfo structure. */ |
H Hartley Sweeten | 1d746c6 | 2014-07-18 14:28:10 -0700 | [diff] [blame] | 148 | if (!access_ok(VERIFY_READ, rangeinfo32, sizeof(*rangeinfo32)) || |
| 149 | !access_ok(VERIFY_WRITE, rangeinfo, sizeof(*rangeinfo))) |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 150 | return -EFAULT; |
H Hartley Sweeten | 1d746c6 | 2014-07-18 14:28:10 -0700 | [diff] [blame] | 151 | |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 152 | err = 0; |
| 153 | err |= __get_user(temp.uint, &rangeinfo32->range_type); |
| 154 | err |= __put_user(temp.uint, &rangeinfo->range_type); |
| 155 | err |= __get_user(temp.uptr, &rangeinfo32->range_ptr); |
| 156 | err |= __put_user(compat_ptr(temp.uptr), &rangeinfo->range_ptr); |
Bill Pemberton | 82675f3 | 2009-03-16 22:04:23 -0400 | [diff] [blame] | 157 | if (err) |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 158 | return -EFAULT; |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 159 | |
| 160 | return translated_ioctl(file, COMEDI_RANGEINFO, |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame] | 161 | (unsigned long)rangeinfo); |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 162 | } |
| 163 | |
| 164 | /* Copy 32-bit cmd structure to native cmd structure. */ |
Shane Warden | f366243 | 2009-09-22 16:13:02 -0700 | [diff] [blame] | 165 | static int get_compat_cmd(struct comedi_cmd __user *cmd, |
| 166 | struct comedi32_cmd_struct __user *cmd32) |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 167 | { |
| 168 | int err; |
| 169 | union { |
| 170 | unsigned int uint; |
| 171 | compat_uptr_t uptr; |
| 172 | } temp; |
| 173 | |
| 174 | /* Copy cmd structure. */ |
H Hartley Sweeten | 1d746c6 | 2014-07-18 14:28:10 -0700 | [diff] [blame] | 175 | if (!access_ok(VERIFY_READ, cmd32, sizeof(*cmd32)) || |
| 176 | !access_ok(VERIFY_WRITE, cmd, sizeof(*cmd))) |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 177 | return -EFAULT; |
H Hartley Sweeten | 1d746c6 | 2014-07-18 14:28:10 -0700 | [diff] [blame] | 178 | |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 179 | err = 0; |
| 180 | err |= __get_user(temp.uint, &cmd32->subdev); |
| 181 | err |= __put_user(temp.uint, &cmd->subdev); |
| 182 | err |= __get_user(temp.uint, &cmd32->flags); |
| 183 | err |= __put_user(temp.uint, &cmd->flags); |
| 184 | err |= __get_user(temp.uint, &cmd32->start_src); |
| 185 | err |= __put_user(temp.uint, &cmd->start_src); |
| 186 | err |= __get_user(temp.uint, &cmd32->start_arg); |
| 187 | err |= __put_user(temp.uint, &cmd->start_arg); |
| 188 | err |= __get_user(temp.uint, &cmd32->scan_begin_src); |
| 189 | err |= __put_user(temp.uint, &cmd->scan_begin_src); |
| 190 | err |= __get_user(temp.uint, &cmd32->scan_begin_arg); |
| 191 | err |= __put_user(temp.uint, &cmd->scan_begin_arg); |
| 192 | err |= __get_user(temp.uint, &cmd32->convert_src); |
| 193 | err |= __put_user(temp.uint, &cmd->convert_src); |
| 194 | err |= __get_user(temp.uint, &cmd32->convert_arg); |
| 195 | err |= __put_user(temp.uint, &cmd->convert_arg); |
| 196 | err |= __get_user(temp.uint, &cmd32->scan_end_src); |
| 197 | err |= __put_user(temp.uint, &cmd->scan_end_src); |
| 198 | err |= __get_user(temp.uint, &cmd32->scan_end_arg); |
| 199 | err |= __put_user(temp.uint, &cmd->scan_end_arg); |
| 200 | err |= __get_user(temp.uint, &cmd32->stop_src); |
| 201 | err |= __put_user(temp.uint, &cmd->stop_src); |
| 202 | err |= __get_user(temp.uint, &cmd32->stop_arg); |
| 203 | err |= __put_user(temp.uint, &cmd->stop_arg); |
| 204 | err |= __get_user(temp.uptr, &cmd32->chanlist); |
Geliang Tang | 0f73490 | 2015-06-22 23:33:42 +0800 | [diff] [blame] | 205 | err |= __put_user((unsigned int __force *)compat_ptr(temp.uptr), |
| 206 | &cmd->chanlist); |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 207 | err |= __get_user(temp.uint, &cmd32->chanlist_len); |
| 208 | err |= __put_user(temp.uint, &cmd->chanlist_len); |
| 209 | err |= __get_user(temp.uptr, &cmd32->data); |
| 210 | err |= __put_user(compat_ptr(temp.uptr), &cmd->data); |
| 211 | err |= __get_user(temp.uint, &cmd32->data_len); |
| 212 | err |= __put_user(temp.uint, &cmd->data_len); |
| 213 | return err ? -EFAULT : 0; |
| 214 | } |
| 215 | |
| 216 | /* Copy native cmd structure to 32-bit cmd structure. */ |
Shane Warden | f366243 | 2009-09-22 16:13:02 -0700 | [diff] [blame] | 217 | static int put_compat_cmd(struct comedi32_cmd_struct __user *cmd32, |
| 218 | struct comedi_cmd __user *cmd) |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 219 | { |
| 220 | int err; |
| 221 | unsigned int temp; |
| 222 | |
Ian Abbott | 79b09aa | 2015-01-27 18:16:54 +0000 | [diff] [blame] | 223 | /* |
| 224 | * Copy back most of cmd structure. |
| 225 | * |
| 226 | * Assume the pointer values are already valid. |
| 227 | * (Could use ptr_to_compat() to set them.) |
| 228 | */ |
H Hartley Sweeten | 1d746c6 | 2014-07-18 14:28:10 -0700 | [diff] [blame] | 229 | if (!access_ok(VERIFY_READ, cmd, sizeof(*cmd)) || |
| 230 | !access_ok(VERIFY_WRITE, cmd32, sizeof(*cmd32))) |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 231 | return -EFAULT; |
H Hartley Sweeten | 1d746c6 | 2014-07-18 14:28:10 -0700 | [diff] [blame] | 232 | |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 233 | err = 0; |
| 234 | err |= __get_user(temp, &cmd->subdev); |
| 235 | err |= __put_user(temp, &cmd32->subdev); |
| 236 | err |= __get_user(temp, &cmd->flags); |
| 237 | err |= __put_user(temp, &cmd32->flags); |
| 238 | err |= __get_user(temp, &cmd->start_src); |
| 239 | err |= __put_user(temp, &cmd32->start_src); |
| 240 | err |= __get_user(temp, &cmd->start_arg); |
| 241 | err |= __put_user(temp, &cmd32->start_arg); |
| 242 | err |= __get_user(temp, &cmd->scan_begin_src); |
| 243 | err |= __put_user(temp, &cmd32->scan_begin_src); |
| 244 | err |= __get_user(temp, &cmd->scan_begin_arg); |
| 245 | err |= __put_user(temp, &cmd32->scan_begin_arg); |
| 246 | err |= __get_user(temp, &cmd->convert_src); |
| 247 | err |= __put_user(temp, &cmd32->convert_src); |
| 248 | err |= __get_user(temp, &cmd->convert_arg); |
| 249 | err |= __put_user(temp, &cmd32->convert_arg); |
| 250 | err |= __get_user(temp, &cmd->scan_end_src); |
| 251 | err |= __put_user(temp, &cmd32->scan_end_src); |
| 252 | err |= __get_user(temp, &cmd->scan_end_arg); |
| 253 | err |= __put_user(temp, &cmd32->scan_end_arg); |
| 254 | err |= __get_user(temp, &cmd->stop_src); |
| 255 | err |= __put_user(temp, &cmd32->stop_src); |
| 256 | err |= __get_user(temp, &cmd->stop_arg); |
| 257 | err |= __put_user(temp, &cmd32->stop_arg); |
| 258 | /* Assume chanlist pointer is unchanged. */ |
| 259 | err |= __get_user(temp, &cmd->chanlist_len); |
| 260 | err |= __put_user(temp, &cmd32->chanlist_len); |
| 261 | /* Assume data pointer is unchanged. */ |
| 262 | err |= __get_user(temp, &cmd->data_len); |
| 263 | err |= __put_user(temp, &cmd32->data_len); |
| 264 | return err ? -EFAULT : 0; |
| 265 | } |
| 266 | |
| 267 | /* Handle 32-bit COMEDI_CMD ioctl. */ |
| 268 | static int compat_cmd(struct file *file, unsigned long arg) |
| 269 | { |
Bill Pemberton | ea6d0d4 | 2009-03-16 22:05:47 -0400 | [diff] [blame] | 270 | struct comedi_cmd __user *cmd; |
Bill Pemberton | bf8db92e | 2009-03-16 22:04:29 -0400 | [diff] [blame] | 271 | struct comedi32_cmd_struct __user *cmd32; |
Ian Abbott | 42b8ce6 | 2015-01-27 18:16:51 +0000 | [diff] [blame] | 272 | int rc, err; |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 273 | |
| 274 | cmd32 = compat_ptr(arg); |
| 275 | cmd = compat_alloc_user_space(sizeof(*cmd)); |
| 276 | |
| 277 | rc = get_compat_cmd(cmd, cmd32); |
Bill Pemberton | 82675f3 | 2009-03-16 22:04:23 -0400 | [diff] [blame] | 278 | if (rc) |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 279 | return rc; |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 280 | |
Ian Abbott | 42b8ce6 | 2015-01-27 18:16:51 +0000 | [diff] [blame] | 281 | rc = translated_ioctl(file, COMEDI_CMD, (unsigned long)cmd); |
| 282 | if (rc == -EAGAIN) { |
| 283 | /* Special case: copy cmd back to user. */ |
| 284 | err = put_compat_cmd(cmd32, cmd); |
| 285 | if (err) |
| 286 | rc = err; |
| 287 | } |
| 288 | |
| 289 | return rc; |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 290 | } |
| 291 | |
| 292 | /* Handle 32-bit COMEDI_CMDTEST ioctl. */ |
| 293 | static int compat_cmdtest(struct file *file, unsigned long arg) |
| 294 | { |
Bill Pemberton | ea6d0d4 | 2009-03-16 22:05:47 -0400 | [diff] [blame] | 295 | struct comedi_cmd __user *cmd; |
Bill Pemberton | bf8db92e | 2009-03-16 22:04:29 -0400 | [diff] [blame] | 296 | struct comedi32_cmd_struct __user *cmd32; |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 297 | int rc, err; |
| 298 | |
| 299 | cmd32 = compat_ptr(arg); |
| 300 | cmd = compat_alloc_user_space(sizeof(*cmd)); |
| 301 | |
| 302 | rc = get_compat_cmd(cmd, cmd32); |
Bill Pemberton | 82675f3 | 2009-03-16 22:04:23 -0400 | [diff] [blame] | 303 | if (rc) |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 304 | return rc; |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 305 | |
| 306 | rc = translated_ioctl(file, COMEDI_CMDTEST, (unsigned long)cmd); |
Bill Pemberton | 82675f3 | 2009-03-16 22:04:23 -0400 | [diff] [blame] | 307 | if (rc < 0) |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 308 | return rc; |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 309 | |
| 310 | err = put_compat_cmd(cmd32, cmd); |
Bill Pemberton | 82675f3 | 2009-03-16 22:04:23 -0400 | [diff] [blame] | 311 | if (err) |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 312 | rc = err; |
Bill Pemberton | 82675f3 | 2009-03-16 22:04:23 -0400 | [diff] [blame] | 313 | |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 314 | return rc; |
| 315 | } |
| 316 | |
| 317 | /* Copy 32-bit insn structure to native insn structure. */ |
Shane Warden | f366243 | 2009-09-22 16:13:02 -0700 | [diff] [blame] | 318 | static int get_compat_insn(struct comedi_insn __user *insn, |
| 319 | struct comedi32_insn_struct __user *insn32) |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 320 | { |
| 321 | int err; |
| 322 | union { |
| 323 | unsigned int uint; |
| 324 | compat_uptr_t uptr; |
| 325 | } temp; |
| 326 | |
| 327 | /* Copy insn structure. Ignore the unused members. */ |
| 328 | err = 0; |
H Hartley Sweeten | 1d746c6 | 2014-07-18 14:28:10 -0700 | [diff] [blame] | 329 | if (!access_ok(VERIFY_READ, insn32, sizeof(*insn32)) || |
| 330 | !access_ok(VERIFY_WRITE, insn, sizeof(*insn))) |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 331 | return -EFAULT; |
Bill Pemberton | 82675f3 | 2009-03-16 22:04:23 -0400 | [diff] [blame] | 332 | |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 333 | err |= __get_user(temp.uint, &insn32->insn); |
| 334 | err |= __put_user(temp.uint, &insn->insn); |
| 335 | err |= __get_user(temp.uint, &insn32->n); |
| 336 | err |= __put_user(temp.uint, &insn->n); |
| 337 | err |= __get_user(temp.uptr, &insn32->data); |
| 338 | err |= __put_user(compat_ptr(temp.uptr), &insn->data); |
| 339 | err |= __get_user(temp.uint, &insn32->subdev); |
| 340 | err |= __put_user(temp.uint, &insn->subdev); |
| 341 | err |= __get_user(temp.uint, &insn32->chanspec); |
| 342 | err |= __put_user(temp.uint, &insn->chanspec); |
| 343 | return err ? -EFAULT : 0; |
| 344 | } |
| 345 | |
| 346 | /* Handle 32-bit COMEDI_INSNLIST ioctl. */ |
| 347 | static int compat_insnlist(struct file *file, unsigned long arg) |
| 348 | { |
| 349 | struct combined_insnlist { |
Bill Pemberton | da613f4 | 2009-03-16 22:05:59 -0400 | [diff] [blame] | 350 | struct comedi_insnlist insnlist; |
Bill Pemberton | 90035c0 | 2009-03-16 22:05:53 -0400 | [diff] [blame] | 351 | struct comedi_insn insn[1]; |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 352 | } __user *s; |
Bill Pemberton | bf8db92e | 2009-03-16 22:04:29 -0400 | [diff] [blame] | 353 | struct comedi32_insnlist_struct __user *insnlist32; |
| 354 | struct comedi32_insn_struct __user *insn32; |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 355 | compat_uptr_t uptr; |
| 356 | unsigned int n_insns, n; |
| 357 | int err, rc; |
| 358 | |
| 359 | insnlist32 = compat_ptr(arg); |
| 360 | |
| 361 | /* Get 32-bit insnlist structure. */ |
Shane Warden | f366243 | 2009-09-22 16:13:02 -0700 | [diff] [blame] | 362 | if (!access_ok(VERIFY_READ, insnlist32, sizeof(*insnlist32))) |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 363 | return -EFAULT; |
Shane Warden | f366243 | 2009-09-22 16:13:02 -0700 | [diff] [blame] | 364 | |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 365 | err = 0; |
| 366 | err |= __get_user(n_insns, &insnlist32->n_insns); |
| 367 | err |= __get_user(uptr, &insnlist32->insns); |
| 368 | insn32 = compat_ptr(uptr); |
Bill Pemberton | 82675f3 | 2009-03-16 22:04:23 -0400 | [diff] [blame] | 369 | if (err) |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 370 | return -EFAULT; |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 371 | |
| 372 | /* Allocate user memory to copy insnlist and insns into. */ |
| 373 | s = compat_alloc_user_space(offsetof(struct combined_insnlist, |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame] | 374 | insn[n_insns])); |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 375 | |
| 376 | /* Set native insnlist structure. */ |
Shane Warden | f366243 | 2009-09-22 16:13:02 -0700 | [diff] [blame] | 377 | if (!access_ok(VERIFY_WRITE, &s->insnlist, sizeof(s->insnlist))) |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 378 | return -EFAULT; |
Shane Warden | f366243 | 2009-09-22 16:13:02 -0700 | [diff] [blame] | 379 | |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 380 | err |= __put_user(n_insns, &s->insnlist.n_insns); |
| 381 | err |= __put_user(&s->insn[0], &s->insnlist.insns); |
Bill Pemberton | 82675f3 | 2009-03-16 22:04:23 -0400 | [diff] [blame] | 382 | if (err) |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 383 | return -EFAULT; |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 384 | |
| 385 | /* Copy insn structures. */ |
| 386 | for (n = 0; n < n_insns; n++) { |
| 387 | rc = get_compat_insn(&s->insn[n], &insn32[n]); |
Bill Pemberton | 82675f3 | 2009-03-16 22:04:23 -0400 | [diff] [blame] | 388 | if (rc) |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 389 | return rc; |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 390 | } |
| 391 | |
| 392 | return translated_ioctl(file, COMEDI_INSNLIST, |
Mithlesh Thukral | 0a85b6f | 2009-06-08 21:04:41 +0530 | [diff] [blame] | 393 | (unsigned long)&s->insnlist); |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 394 | } |
| 395 | |
| 396 | /* Handle 32-bit COMEDI_INSN ioctl. */ |
| 397 | static int compat_insn(struct file *file, unsigned long arg) |
| 398 | { |
Bill Pemberton | 90035c0 | 2009-03-16 22:05:53 -0400 | [diff] [blame] | 399 | struct comedi_insn __user *insn; |
Bill Pemberton | bf8db92e | 2009-03-16 22:04:29 -0400 | [diff] [blame] | 400 | struct comedi32_insn_struct __user *insn32; |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 401 | int rc; |
| 402 | |
| 403 | insn32 = compat_ptr(arg); |
| 404 | insn = compat_alloc_user_space(sizeof(*insn)); |
| 405 | |
| 406 | rc = get_compat_insn(insn, insn32); |
Bill Pemberton | 82675f3 | 2009-03-16 22:04:23 -0400 | [diff] [blame] | 407 | if (rc) |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 408 | return rc; |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 409 | |
| 410 | return translated_ioctl(file, COMEDI_INSN, (unsigned long)insn); |
| 411 | } |
| 412 | |
Ian Abbott | 79b09aa | 2015-01-27 18:16:54 +0000 | [diff] [blame] | 413 | /* |
Ian Abbott | 023e89c | 2015-01-27 18:16:56 +0000 | [diff] [blame] | 414 | * compat_ioctl file operation. |
Ian Abbott | 79b09aa | 2015-01-27 18:16:54 +0000 | [diff] [blame] | 415 | * |
| 416 | * Returns -ENOIOCTLCMD for unrecognised ioctl codes. |
| 417 | */ |
Ian Abbott | 023e89c | 2015-01-27 18:16:56 +0000 | [diff] [blame] | 418 | long comedi_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 419 | { |
| 420 | int rc; |
| 421 | |
| 422 | switch (cmd) { |
| 423 | case COMEDI_DEVCONFIG: |
| 424 | case COMEDI_DEVINFO: |
| 425 | case COMEDI_SUBDINFO: |
| 426 | case COMEDI_BUFCONFIG: |
| 427 | case COMEDI_BUFINFO: |
| 428 | /* Just need to translate the pointer argument. */ |
| 429 | arg = (unsigned long)compat_ptr(arg); |
| 430 | rc = translated_ioctl(file, cmd, arg); |
| 431 | break; |
| 432 | case COMEDI_LOCK: |
| 433 | case COMEDI_UNLOCK: |
| 434 | case COMEDI_CANCEL: |
| 435 | case COMEDI_POLL: |
Ian Abbott | c299a67 | 2014-11-04 18:09:01 +0000 | [diff] [blame] | 436 | case COMEDI_SETRSUBD: |
| 437 | case COMEDI_SETWSUBD: |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 438 | /* No translation needed. */ |
| 439 | rc = translated_ioctl(file, cmd, arg); |
| 440 | break; |
| 441 | case COMEDI32_CHANINFO: |
| 442 | rc = compat_chaninfo(file, arg); |
| 443 | break; |
| 444 | case COMEDI32_RANGEINFO: |
| 445 | rc = compat_rangeinfo(file, arg); |
| 446 | break; |
| 447 | case COMEDI32_CMD: |
| 448 | rc = compat_cmd(file, arg); |
| 449 | break; |
| 450 | case COMEDI32_CMDTEST: |
| 451 | rc = compat_cmdtest(file, arg); |
| 452 | break; |
| 453 | case COMEDI32_INSNLIST: |
| 454 | rc = compat_insnlist(file, arg); |
| 455 | break; |
| 456 | case COMEDI32_INSN: |
| 457 | rc = compat_insn(file, arg); |
| 458 | break; |
| 459 | default: |
| 460 | rc = -ENOIOCTLCMD; |
| 461 | break; |
| 462 | } |
| 463 | return rc; |
| 464 | } |