Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/fs/compat.c |
| 3 | * |
| 4 | * Kernel compatibililty routines for e.g. 32 bit syscall support |
| 5 | * on 64 bit kernels. |
| 6 | * |
| 7 | * Copyright (C) 2002 Stephen Rothwell, IBM Corporation |
| 8 | * Copyright (C) 1997-2000 Jakub Jelinek (jakub@redhat.com) |
| 9 | * Copyright (C) 1998 Eddie C. Dost (ecd@skynet.be) |
| 10 | * Copyright (C) 2001,2002 Andi Kleen, SuSE Labs |
Pavel Machek | a253129 | 2010-07-18 14:27:13 +0200 | [diff] [blame] | 11 | * Copyright (C) 2003 Pavel Machek (pavel@ucw.cz) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 12 | * |
| 13 | * This program is free software; you can redistribute it and/or modify |
| 14 | * it under the terms of the GNU General Public License version 2 as |
| 15 | * published by the Free Software Foundation. |
| 16 | */ |
| 17 | |
Kevin Winchester | 85c9fe8 | 2010-08-09 17:20:22 -0700 | [diff] [blame] | 18 | #include <linux/stddef.h> |
Milind Arun Choudhary | 022a169 | 2007-05-08 00:29:02 -0700 | [diff] [blame] | 19 | #include <linux/kernel.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | #include <linux/linkage.h> |
| 21 | #include <linux/compat.h> |
| 22 | #include <linux/errno.h> |
| 23 | #include <linux/time.h> |
| 24 | #include <linux/fs.h> |
| 25 | #include <linux/fcntl.h> |
| 26 | #include <linux/namei.h> |
| 27 | #include <linux/file.h> |
Al Viro | 9f3acc3 | 2008-04-24 07:44:08 -0400 | [diff] [blame] | 28 | #include <linux/fdtable.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | #include <linux/vfs.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | #include <linux/ioctl.h> |
| 31 | #include <linux/init.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | #include <linux/ncp_mount.h> |
David Howells | 9a9947b | 2005-04-18 10:54:51 -0700 | [diff] [blame] | 33 | #include <linux/nfs4_mount.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | #include <linux/syscalls.h> |
| 35 | #include <linux/ctype.h> |
| 36 | #include <linux/module.h> |
| 37 | #include <linux/dirent.h> |
Robert Love | 0eeca28 | 2005-07-12 17:06:03 -0400 | [diff] [blame] | 38 | #include <linux/fsnotify.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | #include <linux/highuid.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | #include <linux/nfsd/syscall.h> |
| 41 | #include <linux/personality.h> |
| 42 | #include <linux/rwsem.h> |
Jay Lan | 8f0ab51 | 2006-09-30 23:28:59 -0700 | [diff] [blame] | 43 | #include <linux/tsacct_kern.h> |
Christoph Hellwig | 6272e26 | 2007-05-08 00:29:21 -0700 | [diff] [blame] | 44 | #include <linux/security.h> |
Al Viro | a1f8e7f7 | 2006-10-19 16:08:53 -0400 | [diff] [blame] | 45 | #include <linux/highmem.h> |
Davide Libenzi | 6d18c92 | 2007-05-10 22:23:15 -0700 | [diff] [blame] | 46 | #include <linux/signal.h> |
Al Viro | bd01f84 | 2006-10-19 17:23:57 -0400 | [diff] [blame] | 47 | #include <linux/poll.h> |
David S. Miller | 4a805e8 | 2005-09-14 21:40:00 -0700 | [diff] [blame] | 48 | #include <linux/mm.h> |
Davide Libenzi | f6dfb4f | 2007-03-07 20:41:21 -0800 | [diff] [blame] | 49 | #include <linux/eventpoll.h> |
Al Viro | 498052b | 2009-03-30 07:20:30 -0400 | [diff] [blame] | 50 | #include <linux/fs_struct.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 51 | #include <linux/slab.h> |
wu zhangjin | 504b701 | 2010-10-30 08:19:35 -0700 | [diff] [blame] | 52 | #include <linux/pagemap.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | #include <asm/uaccess.h> |
| 55 | #include <asm/mmu_context.h> |
| 56 | #include <asm/ioctls.h> |
David Howells | 07f3f05 | 2006-09-30 20:52:18 +0200 | [diff] [blame] | 57 | #include "internal.h" |
David Woodhouse | 9f72949 | 2006-01-18 17:44:05 -0800 | [diff] [blame] | 58 | |
Andi Kleen | bebfa10 | 2006-06-26 13:56:52 +0200 | [diff] [blame] | 59 | int compat_log = 1; |
| 60 | |
| 61 | int compat_printk(const char *fmt, ...) |
| 62 | { |
| 63 | va_list ap; |
| 64 | int ret; |
| 65 | if (!compat_log) |
| 66 | return 0; |
| 67 | va_start(ap, fmt); |
| 68 | ret = vprintk(fmt, ap); |
| 69 | va_end(ap); |
| 70 | return ret; |
| 71 | } |
| 72 | |
Badari Pulavarty | ee0b3e6 | 2006-09-30 23:28:47 -0700 | [diff] [blame] | 73 | #include "read_write.h" |
| 74 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | /* |
| 76 | * Not all architectures have sys_utime, so implement this in terms |
| 77 | * of sys_utimes. |
| 78 | */ |
David Howells | c788732 | 2010-08-11 11:26:22 +0100 | [diff] [blame] | 79 | asmlinkage long compat_sys_utime(const char __user *filename, |
| 80 | struct compat_utimbuf __user *t) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | { |
Ulrich Drepper | 1c710c8 | 2007-05-08 00:33:25 -0700 | [diff] [blame] | 82 | struct timespec tv[2]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | |
| 84 | if (t) { |
| 85 | if (get_user(tv[0].tv_sec, &t->actime) || |
| 86 | get_user(tv[1].tv_sec, &t->modtime)) |
| 87 | return -EFAULT; |
Ulrich Drepper | 1c710c8 | 2007-05-08 00:33:25 -0700 | [diff] [blame] | 88 | tv[0].tv_nsec = 0; |
| 89 | tv[1].tv_nsec = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | } |
Ulrich Drepper | 1c710c8 | 2007-05-08 00:33:25 -0700 | [diff] [blame] | 91 | return do_utimes(AT_FDCWD, filename, t ? tv : NULL, 0); |
| 92 | } |
| 93 | |
David Howells | c788732 | 2010-08-11 11:26:22 +0100 | [diff] [blame] | 94 | asmlinkage long compat_sys_utimensat(unsigned int dfd, const char __user *filename, struct compat_timespec __user *t, int flags) |
Ulrich Drepper | 1c710c8 | 2007-05-08 00:33:25 -0700 | [diff] [blame] | 95 | { |
| 96 | struct timespec tv[2]; |
| 97 | |
| 98 | if (t) { |
| 99 | if (get_compat_timespec(&tv[0], &t[0]) || |
| 100 | get_compat_timespec(&tv[1], &t[1])) |
| 101 | return -EFAULT; |
| 102 | |
Ulrich Drepper | 1c710c8 | 2007-05-08 00:33:25 -0700 | [diff] [blame] | 103 | if (tv[0].tv_nsec == UTIME_OMIT && tv[1].tv_nsec == UTIME_OMIT) |
| 104 | return 0; |
| 105 | } |
| 106 | return do_utimes(dfd, filename, t ? tv : NULL, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 107 | } |
| 108 | |
David Howells | c788732 | 2010-08-11 11:26:22 +0100 | [diff] [blame] | 109 | asmlinkage long compat_sys_futimesat(unsigned int dfd, const char __user *filename, struct compat_timeval __user *t) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | { |
Ulrich Drepper | 1c710c8 | 2007-05-08 00:33:25 -0700 | [diff] [blame] | 111 | struct timespec tv[2]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | |
Stephen Rothwell | 9ad11ab | 2006-02-02 16:11:51 +1100 | [diff] [blame] | 113 | if (t) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | if (get_user(tv[0].tv_sec, &t[0].tv_sec) || |
Ulrich Drepper | 1c710c8 | 2007-05-08 00:33:25 -0700 | [diff] [blame] | 115 | get_user(tv[0].tv_nsec, &t[0].tv_usec) || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 116 | get_user(tv[1].tv_sec, &t[1].tv_sec) || |
Ulrich Drepper | 1c710c8 | 2007-05-08 00:33:25 -0700 | [diff] [blame] | 117 | get_user(tv[1].tv_nsec, &t[1].tv_usec)) |
Stephen Rothwell | 9ad11ab | 2006-02-02 16:11:51 +1100 | [diff] [blame] | 118 | return -EFAULT; |
Ulrich Drepper | 1c710c8 | 2007-05-08 00:33:25 -0700 | [diff] [blame] | 119 | if (tv[0].tv_nsec >= 1000000 || tv[0].tv_nsec < 0 || |
| 120 | tv[1].tv_nsec >= 1000000 || tv[1].tv_nsec < 0) |
| 121 | return -EINVAL; |
| 122 | tv[0].tv_nsec *= 1000; |
| 123 | tv[1].tv_nsec *= 1000; |
Stephen Rothwell | 9ad11ab | 2006-02-02 16:11:51 +1100 | [diff] [blame] | 124 | } |
Ulrich Drepper | 1c710c8 | 2007-05-08 00:33:25 -0700 | [diff] [blame] | 125 | return do_utimes(dfd, filename, t ? tv : NULL, 0); |
Ulrich Drepper | 5590ff0 | 2006-01-18 17:43:53 -0800 | [diff] [blame] | 126 | } |
| 127 | |
David Howells | c788732 | 2010-08-11 11:26:22 +0100 | [diff] [blame] | 128 | asmlinkage long compat_sys_utimes(const char __user *filename, struct compat_timeval __user *t) |
Ulrich Drepper | 5590ff0 | 2006-01-18 17:43:53 -0800 | [diff] [blame] | 129 | { |
| 130 | return compat_sys_futimesat(AT_FDCWD, filename, t); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 131 | } |
| 132 | |
Christoph Hellwig | f7a5000 | 2008-10-15 22:02:05 -0700 | [diff] [blame] | 133 | static int cp_compat_stat(struct kstat *stat, struct compat_stat __user *ubuf) |
| 134 | { |
| 135 | compat_ino_t ino = stat->ino; |
| 136 | typeof(ubuf->st_uid) uid = 0; |
| 137 | typeof(ubuf->st_gid) gid = 0; |
| 138 | int err; |
| 139 | |
| 140 | SET_UID(uid, stat->uid); |
| 141 | SET_GID(gid, stat->gid); |
| 142 | |
| 143 | if ((u64) stat->size > MAX_NON_LFS || |
| 144 | !old_valid_dev(stat->dev) || |
| 145 | !old_valid_dev(stat->rdev)) |
| 146 | return -EOVERFLOW; |
| 147 | if (sizeof(ino) < sizeof(stat->ino) && ino != stat->ino) |
| 148 | return -EOVERFLOW; |
| 149 | |
| 150 | if (clear_user(ubuf, sizeof(*ubuf))) |
| 151 | return -EFAULT; |
| 152 | |
| 153 | err = __put_user(old_encode_dev(stat->dev), &ubuf->st_dev); |
| 154 | err |= __put_user(ino, &ubuf->st_ino); |
| 155 | err |= __put_user(stat->mode, &ubuf->st_mode); |
| 156 | err |= __put_user(stat->nlink, &ubuf->st_nlink); |
| 157 | err |= __put_user(uid, &ubuf->st_uid); |
| 158 | err |= __put_user(gid, &ubuf->st_gid); |
| 159 | err |= __put_user(old_encode_dev(stat->rdev), &ubuf->st_rdev); |
| 160 | err |= __put_user(stat->size, &ubuf->st_size); |
| 161 | err |= __put_user(stat->atime.tv_sec, &ubuf->st_atime); |
| 162 | err |= __put_user(stat->atime.tv_nsec, &ubuf->st_atime_nsec); |
| 163 | err |= __put_user(stat->mtime.tv_sec, &ubuf->st_mtime); |
| 164 | err |= __put_user(stat->mtime.tv_nsec, &ubuf->st_mtime_nsec); |
| 165 | err |= __put_user(stat->ctime.tv_sec, &ubuf->st_ctime); |
| 166 | err |= __put_user(stat->ctime.tv_nsec, &ubuf->st_ctime_nsec); |
| 167 | err |= __put_user(stat->blksize, &ubuf->st_blksize); |
| 168 | err |= __put_user(stat->blocks, &ubuf->st_blocks); |
| 169 | return err; |
| 170 | } |
| 171 | |
David Howells | c788732 | 2010-08-11 11:26:22 +0100 | [diff] [blame] | 172 | asmlinkage long compat_sys_newstat(const char __user * filename, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | struct compat_stat __user *statbuf) |
| 174 | { |
| 175 | struct kstat stat; |
Christoph Hellwig | 2eae7a1 | 2009-04-08 16:34:03 -0400 | [diff] [blame] | 176 | int error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 177 | |
Christoph Hellwig | 2eae7a1 | 2009-04-08 16:34:03 -0400 | [diff] [blame] | 178 | error = vfs_stat(filename, &stat); |
| 179 | if (error) |
| 180 | return error; |
| 181 | return cp_compat_stat(&stat, statbuf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 182 | } |
| 183 | |
David Howells | c788732 | 2010-08-11 11:26:22 +0100 | [diff] [blame] | 184 | asmlinkage long compat_sys_newlstat(const char __user * filename, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 185 | struct compat_stat __user *statbuf) |
| 186 | { |
| 187 | struct kstat stat; |
Christoph Hellwig | 2eae7a1 | 2009-04-08 16:34:03 -0400 | [diff] [blame] | 188 | int error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 189 | |
Christoph Hellwig | 2eae7a1 | 2009-04-08 16:34:03 -0400 | [diff] [blame] | 190 | error = vfs_lstat(filename, &stat); |
| 191 | if (error) |
| 192 | return error; |
| 193 | return cp_compat_stat(&stat, statbuf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 194 | } |
| 195 | |
Kyle McMartin | 82d821d | 2006-03-24 03:18:20 -0800 | [diff] [blame] | 196 | #ifndef __ARCH_WANT_STAT64 |
David Howells | c788732 | 2010-08-11 11:26:22 +0100 | [diff] [blame] | 197 | asmlinkage long compat_sys_newfstatat(unsigned int dfd, |
| 198 | const char __user *filename, |
Ulrich Drepper | 5590ff0 | 2006-01-18 17:43:53 -0800 | [diff] [blame] | 199 | struct compat_stat __user *statbuf, int flag) |
| 200 | { |
| 201 | struct kstat stat; |
Oleg Drokin | 0112fc2 | 2009-04-08 20:05:42 +0400 | [diff] [blame] | 202 | int error; |
Ulrich Drepper | 5590ff0 | 2006-01-18 17:43:53 -0800 | [diff] [blame] | 203 | |
Oleg Drokin | 0112fc2 | 2009-04-08 20:05:42 +0400 | [diff] [blame] | 204 | error = vfs_fstatat(dfd, filename, &stat, flag); |
| 205 | if (error) |
| 206 | return error; |
| 207 | return cp_compat_stat(&stat, statbuf); |
Ulrich Drepper | 5590ff0 | 2006-01-18 17:43:53 -0800 | [diff] [blame] | 208 | } |
Kyle McMartin | 82d821d | 2006-03-24 03:18:20 -0800 | [diff] [blame] | 209 | #endif |
Ulrich Drepper | 5590ff0 | 2006-01-18 17:43:53 -0800 | [diff] [blame] | 210 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 211 | asmlinkage long compat_sys_newfstat(unsigned int fd, |
| 212 | struct compat_stat __user * statbuf) |
| 213 | { |
| 214 | struct kstat stat; |
| 215 | int error = vfs_fstat(fd, &stat); |
| 216 | |
| 217 | if (!error) |
| 218 | error = cp_compat_stat(&stat, statbuf); |
| 219 | return error; |
| 220 | } |
| 221 | |
| 222 | static int put_compat_statfs(struct compat_statfs __user *ubuf, struct kstatfs *kbuf) |
| 223 | { |
| 224 | |
| 225 | if (sizeof ubuf->f_blocks == 4) { |
Jon Tollefson | f4a67cc | 2008-07-23 21:27:55 -0700 | [diff] [blame] | 226 | if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail | |
| 227 | kbuf->f_bsize | kbuf->f_frsize) & 0xffffffff00000000ULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 228 | return -EOVERFLOW; |
| 229 | /* f_files and f_ffree may be -1; it's okay |
| 230 | * to stuff that into 32 bits */ |
| 231 | if (kbuf->f_files != 0xffffffffffffffffULL |
| 232 | && (kbuf->f_files & 0xffffffff00000000ULL)) |
| 233 | return -EOVERFLOW; |
| 234 | if (kbuf->f_ffree != 0xffffffffffffffffULL |
| 235 | && (kbuf->f_ffree & 0xffffffff00000000ULL)) |
| 236 | return -EOVERFLOW; |
| 237 | } |
| 238 | if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) || |
| 239 | __put_user(kbuf->f_type, &ubuf->f_type) || |
| 240 | __put_user(kbuf->f_bsize, &ubuf->f_bsize) || |
| 241 | __put_user(kbuf->f_blocks, &ubuf->f_blocks) || |
| 242 | __put_user(kbuf->f_bfree, &ubuf->f_bfree) || |
| 243 | __put_user(kbuf->f_bavail, &ubuf->f_bavail) || |
| 244 | __put_user(kbuf->f_files, &ubuf->f_files) || |
| 245 | __put_user(kbuf->f_ffree, &ubuf->f_ffree) || |
| 246 | __put_user(kbuf->f_namelen, &ubuf->f_namelen) || |
| 247 | __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) || |
| 248 | __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) || |
| 249 | __put_user(kbuf->f_frsize, &ubuf->f_frsize) || |
Eric W. Biederman | 1448c72 | 2011-10-17 13:40:02 -0700 | [diff] [blame] | 250 | __put_user(kbuf->f_flags, &ubuf->f_flags) || |
| 251 | __clear_user(ubuf->f_spare, sizeof(ubuf->f_spare))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 252 | return -EFAULT; |
| 253 | return 0; |
| 254 | } |
| 255 | |
| 256 | /* |
Namhyung Kim | 974d879 | 2010-12-27 01:41:53 +0900 | [diff] [blame] | 257 | * The following statfs calls are copies of code from fs/statfs.c and |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 258 | * should be checked against those from time to time |
| 259 | */ |
Al Viro | 2d8f303 | 2008-07-22 09:59:21 -0400 | [diff] [blame] | 260 | asmlinkage long compat_sys_statfs(const char __user *pathname, struct compat_statfs __user *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 261 | { |
Al Viro | c8b91ac | 2011-03-12 10:41:39 -0500 | [diff] [blame] | 262 | struct kstatfs tmp; |
| 263 | int error = user_statfs(pathname, &tmp); |
| 264 | if (!error) |
| 265 | error = put_compat_statfs(buf, &tmp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 266 | return error; |
| 267 | } |
| 268 | |
| 269 | asmlinkage long compat_sys_fstatfs(unsigned int fd, struct compat_statfs __user *buf) |
| 270 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 271 | struct kstatfs tmp; |
Al Viro | c8b91ac | 2011-03-12 10:41:39 -0500 | [diff] [blame] | 272 | int error = fd_statfs(fd, &tmp); |
David Gibson | 86e07ce | 2005-11-21 21:32:23 -0800 | [diff] [blame] | 273 | if (!error) |
| 274 | error = put_compat_statfs(buf, &tmp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 275 | return error; |
| 276 | } |
| 277 | |
| 278 | static int put_compat_statfs64(struct compat_statfs64 __user *ubuf, struct kstatfs *kbuf) |
| 279 | { |
| 280 | if (sizeof ubuf->f_blocks == 4) { |
Jon Tollefson | f4a67cc | 2008-07-23 21:27:55 -0700 | [diff] [blame] | 281 | if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail | |
| 282 | kbuf->f_bsize | kbuf->f_frsize) & 0xffffffff00000000ULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 283 | return -EOVERFLOW; |
| 284 | /* f_files and f_ffree may be -1; it's okay |
| 285 | * to stuff that into 32 bits */ |
| 286 | if (kbuf->f_files != 0xffffffffffffffffULL |
| 287 | && (kbuf->f_files & 0xffffffff00000000ULL)) |
| 288 | return -EOVERFLOW; |
| 289 | if (kbuf->f_ffree != 0xffffffffffffffffULL |
| 290 | && (kbuf->f_ffree & 0xffffffff00000000ULL)) |
| 291 | return -EOVERFLOW; |
| 292 | } |
| 293 | if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) || |
| 294 | __put_user(kbuf->f_type, &ubuf->f_type) || |
| 295 | __put_user(kbuf->f_bsize, &ubuf->f_bsize) || |
| 296 | __put_user(kbuf->f_blocks, &ubuf->f_blocks) || |
| 297 | __put_user(kbuf->f_bfree, &ubuf->f_bfree) || |
| 298 | __put_user(kbuf->f_bavail, &ubuf->f_bavail) || |
| 299 | __put_user(kbuf->f_files, &ubuf->f_files) || |
| 300 | __put_user(kbuf->f_ffree, &ubuf->f_ffree) || |
| 301 | __put_user(kbuf->f_namelen, &ubuf->f_namelen) || |
| 302 | __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) || |
| 303 | __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) || |
Namhyung Kim | e0bb6bd | 2010-12-27 01:41:54 +0900 | [diff] [blame] | 304 | __put_user(kbuf->f_frsize, &ubuf->f_frsize) || |
| 305 | __put_user(kbuf->f_flags, &ubuf->f_flags) || |
| 306 | __clear_user(ubuf->f_spare, sizeof(ubuf->f_spare))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 307 | return -EFAULT; |
| 308 | return 0; |
| 309 | } |
| 310 | |
Al Viro | 2d8f303 | 2008-07-22 09:59:21 -0400 | [diff] [blame] | 311 | asmlinkage long compat_sys_statfs64(const char __user *pathname, compat_size_t sz, struct compat_statfs64 __user *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 312 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 313 | struct kstatfs tmp; |
| 314 | int error; |
| 315 | |
| 316 | if (sz != sizeof(*buf)) |
| 317 | return -EINVAL; |
| 318 | |
Al Viro | c8b91ac | 2011-03-12 10:41:39 -0500 | [diff] [blame] | 319 | error = user_statfs(pathname, &tmp); |
David Gibson | 86e07ce | 2005-11-21 21:32:23 -0800 | [diff] [blame] | 320 | if (!error) |
| 321 | error = put_compat_statfs64(buf, &tmp); |
Al Viro | c8b91ac | 2011-03-12 10:41:39 -0500 | [diff] [blame] | 322 | return error; |
| 323 | } |
| 324 | |
| 325 | asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz, struct compat_statfs64 __user *buf) |
| 326 | { |
| 327 | struct kstatfs tmp; |
| 328 | int error; |
| 329 | |
| 330 | if (sz != sizeof(*buf)) |
| 331 | return -EINVAL; |
| 332 | |
| 333 | error = fd_statfs(fd, &tmp); |
| 334 | if (!error) |
| 335 | error = put_compat_statfs64(buf, &tmp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 336 | return error; |
| 337 | } |
| 338 | |
Christoph Hellwig | 2b1c6bd | 2008-11-28 10:09:09 +0100 | [diff] [blame] | 339 | /* |
| 340 | * This is a copy of sys_ustat, just dealing with a structure layout. |
| 341 | * Given how simple this syscall is that apporach is more maintainable |
| 342 | * than the various conversion hacks. |
| 343 | */ |
| 344 | asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u) |
| 345 | { |
| 346 | struct super_block *sb; |
| 347 | struct compat_ustat tmp; |
| 348 | struct kstatfs sbuf; |
| 349 | int err; |
| 350 | |
| 351 | sb = user_get_super(new_decode_dev(dev)); |
| 352 | if (!sb) |
| 353 | return -EINVAL; |
Christoph Hellwig | ebabe9a | 2010-07-07 18:53:11 +0200 | [diff] [blame] | 354 | err = statfs_by_dentry(sb->s_root, &sbuf); |
Christoph Hellwig | 2b1c6bd | 2008-11-28 10:09:09 +0100 | [diff] [blame] | 355 | drop_super(sb); |
| 356 | if (err) |
| 357 | return err; |
| 358 | |
| 359 | memset(&tmp, 0, sizeof(struct compat_ustat)); |
| 360 | tmp.f_tfree = sbuf.f_bfree; |
| 361 | tmp.f_tinode = sbuf.f_ffree; |
| 362 | if (copy_to_user(u, &tmp, sizeof(struct compat_ustat))) |
| 363 | return -EFAULT; |
| 364 | return 0; |
| 365 | } |
| 366 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 367 | static int get_compat_flock(struct flock *kfl, struct compat_flock __user *ufl) |
| 368 | { |
| 369 | if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) || |
| 370 | __get_user(kfl->l_type, &ufl->l_type) || |
| 371 | __get_user(kfl->l_whence, &ufl->l_whence) || |
| 372 | __get_user(kfl->l_start, &ufl->l_start) || |
| 373 | __get_user(kfl->l_len, &ufl->l_len) || |
| 374 | __get_user(kfl->l_pid, &ufl->l_pid)) |
| 375 | return -EFAULT; |
| 376 | return 0; |
| 377 | } |
| 378 | |
| 379 | static int put_compat_flock(struct flock *kfl, struct compat_flock __user *ufl) |
| 380 | { |
| 381 | if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) || |
| 382 | __put_user(kfl->l_type, &ufl->l_type) || |
| 383 | __put_user(kfl->l_whence, &ufl->l_whence) || |
| 384 | __put_user(kfl->l_start, &ufl->l_start) || |
| 385 | __put_user(kfl->l_len, &ufl->l_len) || |
| 386 | __put_user(kfl->l_pid, &ufl->l_pid)) |
| 387 | return -EFAULT; |
| 388 | return 0; |
| 389 | } |
| 390 | |
| 391 | #ifndef HAVE_ARCH_GET_COMPAT_FLOCK64 |
| 392 | static int get_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl) |
| 393 | { |
| 394 | if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) || |
| 395 | __get_user(kfl->l_type, &ufl->l_type) || |
| 396 | __get_user(kfl->l_whence, &ufl->l_whence) || |
| 397 | __get_user(kfl->l_start, &ufl->l_start) || |
| 398 | __get_user(kfl->l_len, &ufl->l_len) || |
| 399 | __get_user(kfl->l_pid, &ufl->l_pid)) |
| 400 | return -EFAULT; |
| 401 | return 0; |
| 402 | } |
| 403 | #endif |
| 404 | |
| 405 | #ifndef HAVE_ARCH_PUT_COMPAT_FLOCK64 |
| 406 | static int put_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl) |
| 407 | { |
| 408 | if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) || |
| 409 | __put_user(kfl->l_type, &ufl->l_type) || |
| 410 | __put_user(kfl->l_whence, &ufl->l_whence) || |
| 411 | __put_user(kfl->l_start, &ufl->l_start) || |
| 412 | __put_user(kfl->l_len, &ufl->l_len) || |
| 413 | __put_user(kfl->l_pid, &ufl->l_pid)) |
| 414 | return -EFAULT; |
| 415 | return 0; |
| 416 | } |
| 417 | #endif |
| 418 | |
| 419 | asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd, |
| 420 | unsigned long arg) |
| 421 | { |
| 422 | mm_segment_t old_fs; |
| 423 | struct flock f; |
| 424 | long ret; |
| 425 | |
| 426 | switch (cmd) { |
| 427 | case F_GETLK: |
| 428 | case F_SETLK: |
| 429 | case F_SETLKW: |
| 430 | ret = get_compat_flock(&f, compat_ptr(arg)); |
| 431 | if (ret != 0) |
| 432 | break; |
| 433 | old_fs = get_fs(); |
| 434 | set_fs(KERNEL_DS); |
| 435 | ret = sys_fcntl(fd, cmd, (unsigned long)&f); |
| 436 | set_fs(old_fs); |
| 437 | if (cmd == F_GETLK && ret == 0) { |
Nikanth Karthikesan | ff677f8 | 2009-04-01 14:40:51 +0530 | [diff] [blame] | 438 | /* GETLK was successful and we need to return the data... |
NeilBrown | 2520f14 | 2006-01-08 01:02:40 -0800 | [diff] [blame] | 439 | * but it needs to fit in the compat structure. |
| 440 | * l_start shouldn't be too big, unless the original |
| 441 | * start + end is greater than COMPAT_OFF_T_MAX, in which |
| 442 | * case the app was asking for trouble, so we return |
| 443 | * -EOVERFLOW in that case. |
| 444 | * l_len could be too big, in which case we just truncate it, |
| 445 | * and only allow the app to see that part of the conflicting |
| 446 | * lock that might make sense to it anyway |
| 447 | */ |
| 448 | |
| 449 | if (f.l_start > COMPAT_OFF_T_MAX) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | ret = -EOVERFLOW; |
NeilBrown | 2520f14 | 2006-01-08 01:02:40 -0800 | [diff] [blame] | 451 | if (f.l_len > COMPAT_OFF_T_MAX) |
| 452 | f.l_len = COMPAT_OFF_T_MAX; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 453 | if (ret == 0) |
| 454 | ret = put_compat_flock(&f, compat_ptr(arg)); |
| 455 | } |
| 456 | break; |
| 457 | |
| 458 | case F_GETLK64: |
| 459 | case F_SETLK64: |
| 460 | case F_SETLKW64: |
| 461 | ret = get_compat_flock64(&f, compat_ptr(arg)); |
| 462 | if (ret != 0) |
| 463 | break; |
| 464 | old_fs = get_fs(); |
| 465 | set_fs(KERNEL_DS); |
| 466 | ret = sys_fcntl(fd, (cmd == F_GETLK64) ? F_GETLK : |
| 467 | ((cmd == F_SETLK64) ? F_SETLK : F_SETLKW), |
| 468 | (unsigned long)&f); |
| 469 | set_fs(old_fs); |
| 470 | if (cmd == F_GETLK64 && ret == 0) { |
NeilBrown | 2520f14 | 2006-01-08 01:02:40 -0800 | [diff] [blame] | 471 | /* need to return lock information - see above for commentary */ |
| 472 | if (f.l_start > COMPAT_LOFF_T_MAX) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 473 | ret = -EOVERFLOW; |
NeilBrown | 2520f14 | 2006-01-08 01:02:40 -0800 | [diff] [blame] | 474 | if (f.l_len > COMPAT_LOFF_T_MAX) |
| 475 | f.l_len = COMPAT_LOFF_T_MAX; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 476 | if (ret == 0) |
| 477 | ret = put_compat_flock64(&f, compat_ptr(arg)); |
| 478 | } |
| 479 | break; |
| 480 | |
| 481 | default: |
| 482 | ret = sys_fcntl(fd, cmd, arg); |
| 483 | break; |
| 484 | } |
| 485 | return ret; |
| 486 | } |
| 487 | |
| 488 | asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd, |
| 489 | unsigned long arg) |
| 490 | { |
| 491 | if ((cmd == F_GETLK64) || (cmd == F_SETLK64) || (cmd == F_SETLKW64)) |
| 492 | return -EINVAL; |
| 493 | return compat_sys_fcntl64(fd, cmd, arg); |
| 494 | } |
| 495 | |
| 496 | asmlinkage long |
| 497 | compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p) |
| 498 | { |
| 499 | long ret; |
| 500 | aio_context_t ctx64; |
| 501 | |
| 502 | mm_segment_t oldfs = get_fs(); |
| 503 | if (unlikely(get_user(ctx64, ctx32p))) |
| 504 | return -EFAULT; |
| 505 | |
| 506 | set_fs(KERNEL_DS); |
| 507 | /* The __user pointer cast is valid because of the set_fs() */ |
| 508 | ret = sys_io_setup(nr_reqs, (aio_context_t __user *) &ctx64); |
| 509 | set_fs(oldfs); |
| 510 | /* truncating is ok because it's a user address */ |
| 511 | if (!ret) |
| 512 | ret = put_user((u32) ctx64, ctx32p); |
| 513 | return ret; |
| 514 | } |
| 515 | |
| 516 | asmlinkage long |
| 517 | compat_sys_io_getevents(aio_context_t ctx_id, |
| 518 | unsigned long min_nr, |
| 519 | unsigned long nr, |
| 520 | struct io_event __user *events, |
| 521 | struct compat_timespec __user *timeout) |
| 522 | { |
| 523 | long ret; |
| 524 | struct timespec t; |
| 525 | struct timespec __user *ut = NULL; |
| 526 | |
| 527 | ret = -EFAULT; |
| 528 | if (unlikely(!access_ok(VERIFY_WRITE, events, |
| 529 | nr * sizeof(struct io_event)))) |
| 530 | goto out; |
| 531 | if (timeout) { |
| 532 | if (get_compat_timespec(&t, timeout)) |
| 533 | goto out; |
| 534 | |
| 535 | ut = compat_alloc_user_space(sizeof(*ut)); |
| 536 | if (copy_to_user(ut, &t, sizeof(t)) ) |
| 537 | goto out; |
| 538 | } |
| 539 | ret = sys_io_getevents(ctx_id, min_nr, nr, events, ut); |
| 540 | out: |
| 541 | return ret; |
| 542 | } |
| 543 | |
Jeff Moyer | b837336 | 2010-05-26 14:44:25 -0700 | [diff] [blame] | 544 | /* A write operation does a read from user space and vice versa */ |
| 545 | #define vrfy_dir(type) ((type) == READ ? VERIFY_WRITE : VERIFY_READ) |
| 546 | |
| 547 | ssize_t compat_rw_copy_check_uvector(int type, |
| 548 | const struct compat_iovec __user *uvector, unsigned long nr_segs, |
| 549 | unsigned long fast_segs, struct iovec *fast_pointer, |
| 550 | struct iovec **ret_pointer) |
| 551 | { |
| 552 | compat_ssize_t tot_len; |
| 553 | struct iovec *iov = *ret_pointer = fast_pointer; |
| 554 | ssize_t ret = 0; |
| 555 | int seg; |
| 556 | |
| 557 | /* |
| 558 | * SuS says "The readv() function *may* fail if the iovcnt argument |
| 559 | * was less than or equal to 0, or greater than {IOV_MAX}. Linux has |
| 560 | * traditionally returned zero for zero segments, so... |
| 561 | */ |
| 562 | if (nr_segs == 0) |
| 563 | goto out; |
| 564 | |
| 565 | ret = -EINVAL; |
| 566 | if (nr_segs > UIO_MAXIOV || nr_segs < 0) |
| 567 | goto out; |
| 568 | if (nr_segs > fast_segs) { |
| 569 | ret = -ENOMEM; |
| 570 | iov = kmalloc(nr_segs*sizeof(struct iovec), GFP_KERNEL); |
Namhyung Kim | 6a5640f1 | 2010-12-27 01:41:52 +0900 | [diff] [blame] | 571 | if (iov == NULL) |
Jeff Moyer | b837336 | 2010-05-26 14:44:25 -0700 | [diff] [blame] | 572 | goto out; |
Jeff Moyer | b837336 | 2010-05-26 14:44:25 -0700 | [diff] [blame] | 573 | } |
| 574 | *ret_pointer = iov; |
| 575 | |
| 576 | /* |
| 577 | * Single unix specification: |
| 578 | * We should -EINVAL if an element length is not >= 0 and fitting an |
Linus Torvalds | 435f49a | 2010-10-29 10:36:49 -0700 | [diff] [blame] | 579 | * ssize_t. |
Jeff Moyer | b837336 | 2010-05-26 14:44:25 -0700 | [diff] [blame] | 580 | * |
Linus Torvalds | 435f49a | 2010-10-29 10:36:49 -0700 | [diff] [blame] | 581 | * In Linux, the total length is limited to MAX_RW_COUNT, there is |
| 582 | * no overflow possibility. |
Jeff Moyer | b837336 | 2010-05-26 14:44:25 -0700 | [diff] [blame] | 583 | */ |
| 584 | tot_len = 0; |
| 585 | ret = -EINVAL; |
| 586 | for (seg = 0; seg < nr_segs; seg++) { |
Jeff Moyer | b837336 | 2010-05-26 14:44:25 -0700 | [diff] [blame] | 587 | compat_uptr_t buf; |
| 588 | compat_ssize_t len; |
| 589 | |
| 590 | if (__get_user(len, &uvector->iov_len) || |
| 591 | __get_user(buf, &uvector->iov_base)) { |
| 592 | ret = -EFAULT; |
| 593 | goto out; |
| 594 | } |
| 595 | if (len < 0) /* size_t not fitting in compat_ssize_t .. */ |
| 596 | goto out; |
Heiko Carstens | 7cbe177 | 2010-06-04 14:14:47 -0700 | [diff] [blame] | 597 | if (!access_ok(vrfy_dir(type), compat_ptr(buf), len)) { |
Jeff Moyer | b837336 | 2010-05-26 14:44:25 -0700 | [diff] [blame] | 598 | ret = -EFAULT; |
| 599 | goto out; |
| 600 | } |
Linus Torvalds | 435f49a | 2010-10-29 10:36:49 -0700 | [diff] [blame] | 601 | if (len > MAX_RW_COUNT - tot_len) |
| 602 | len = MAX_RW_COUNT - tot_len; |
| 603 | tot_len += len; |
Jeff Moyer | b837336 | 2010-05-26 14:44:25 -0700 | [diff] [blame] | 604 | iov->iov_base = compat_ptr(buf); |
| 605 | iov->iov_len = (compat_size_t) len; |
| 606 | uvector++; |
| 607 | iov++; |
| 608 | } |
| 609 | ret = tot_len; |
| 610 | |
| 611 | out: |
| 612 | return ret; |
| 613 | } |
| 614 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 615 | static inline long |
| 616 | copy_iocb(long nr, u32 __user *ptr32, struct iocb __user * __user *ptr64) |
| 617 | { |
| 618 | compat_uptr_t uptr; |
| 619 | int i; |
| 620 | |
| 621 | for (i = 0; i < nr; ++i) { |
| 622 | if (get_user(uptr, ptr32 + i)) |
| 623 | return -EFAULT; |
| 624 | if (put_user(compat_ptr(uptr), ptr64 + i)) |
| 625 | return -EFAULT; |
| 626 | } |
| 627 | return 0; |
| 628 | } |
| 629 | |
| 630 | #define MAX_AIO_SUBMITS (PAGE_SIZE/sizeof(struct iocb *)) |
| 631 | |
| 632 | asmlinkage long |
| 633 | compat_sys_io_submit(aio_context_t ctx_id, int nr, u32 __user *iocb) |
| 634 | { |
| 635 | struct iocb __user * __user *iocb64; |
| 636 | long ret; |
| 637 | |
| 638 | if (unlikely(nr < 0)) |
| 639 | return -EINVAL; |
| 640 | |
| 641 | if (nr > MAX_AIO_SUBMITS) |
| 642 | nr = MAX_AIO_SUBMITS; |
| 643 | |
| 644 | iocb64 = compat_alloc_user_space(nr * sizeof(*iocb64)); |
| 645 | ret = copy_iocb(nr, iocb, iocb64); |
| 646 | if (!ret) |
Jeff Moyer | 9d85cba | 2010-05-26 14:44:26 -0700 | [diff] [blame] | 647 | ret = do_io_submit(ctx_id, nr, iocb64, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 648 | return ret; |
| 649 | } |
| 650 | |
| 651 | struct compat_ncp_mount_data { |
| 652 | compat_int_t version; |
| 653 | compat_uint_t ncp_fd; |
Stephen Rothwell | 202e597 | 2005-09-06 15:16:40 -0700 | [diff] [blame] | 654 | __compat_uid_t mounted_uid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 655 | compat_pid_t wdog_pid; |
| 656 | unsigned char mounted_vol[NCP_VOLNAME_LEN + 1]; |
| 657 | compat_uint_t time_out; |
| 658 | compat_uint_t retry_count; |
| 659 | compat_uint_t flags; |
Stephen Rothwell | 202e597 | 2005-09-06 15:16:40 -0700 | [diff] [blame] | 660 | __compat_uid_t uid; |
| 661 | __compat_gid_t gid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 662 | compat_mode_t file_mode; |
| 663 | compat_mode_t dir_mode; |
| 664 | }; |
| 665 | |
| 666 | struct compat_ncp_mount_data_v4 { |
| 667 | compat_int_t version; |
| 668 | compat_ulong_t flags; |
| 669 | compat_ulong_t mounted_uid; |
| 670 | compat_long_t wdog_pid; |
| 671 | compat_uint_t ncp_fd; |
| 672 | compat_uint_t time_out; |
| 673 | compat_uint_t retry_count; |
| 674 | compat_ulong_t uid; |
| 675 | compat_ulong_t gid; |
| 676 | compat_ulong_t file_mode; |
| 677 | compat_ulong_t dir_mode; |
| 678 | }; |
| 679 | |
| 680 | static void *do_ncp_super_data_conv(void *raw_data) |
| 681 | { |
| 682 | int version = *(unsigned int *)raw_data; |
| 683 | |
| 684 | if (version == 3) { |
| 685 | struct compat_ncp_mount_data *c_n = raw_data; |
| 686 | struct ncp_mount_data *n = raw_data; |
| 687 | |
| 688 | n->dir_mode = c_n->dir_mode; |
| 689 | n->file_mode = c_n->file_mode; |
| 690 | n->gid = c_n->gid; |
| 691 | n->uid = c_n->uid; |
| 692 | memmove (n->mounted_vol, c_n->mounted_vol, (sizeof (c_n->mounted_vol) + 3 * sizeof (unsigned int))); |
| 693 | n->wdog_pid = c_n->wdog_pid; |
| 694 | n->mounted_uid = c_n->mounted_uid; |
| 695 | } else if (version == 4) { |
| 696 | struct compat_ncp_mount_data_v4 *c_n = raw_data; |
| 697 | struct ncp_mount_data_v4 *n = raw_data; |
| 698 | |
| 699 | n->dir_mode = c_n->dir_mode; |
| 700 | n->file_mode = c_n->file_mode; |
| 701 | n->gid = c_n->gid; |
| 702 | n->uid = c_n->uid; |
| 703 | n->retry_count = c_n->retry_count; |
| 704 | n->time_out = c_n->time_out; |
| 705 | n->ncp_fd = c_n->ncp_fd; |
| 706 | n->wdog_pid = c_n->wdog_pid; |
| 707 | n->mounted_uid = c_n->mounted_uid; |
| 708 | n->flags = c_n->flags; |
| 709 | } else if (version != 5) { |
| 710 | return NULL; |
| 711 | } |
| 712 | |
| 713 | return raw_data; |
| 714 | } |
| 715 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 716 | |
David Howells | 9a9947b | 2005-04-18 10:54:51 -0700 | [diff] [blame] | 717 | struct compat_nfs_string { |
| 718 | compat_uint_t len; |
David Howells | 5fc3e62 | 2005-04-27 15:39:03 -0700 | [diff] [blame] | 719 | compat_uptr_t data; |
David Howells | 9a9947b | 2005-04-18 10:54:51 -0700 | [diff] [blame] | 720 | }; |
| 721 | |
| 722 | static inline void compat_nfs_string(struct nfs_string *dst, |
| 723 | struct compat_nfs_string *src) |
| 724 | { |
| 725 | dst->data = compat_ptr(src->data); |
| 726 | dst->len = src->len; |
| 727 | } |
| 728 | |
| 729 | struct compat_nfs4_mount_data_v1 { |
| 730 | compat_int_t version; |
| 731 | compat_int_t flags; |
| 732 | compat_int_t rsize; |
| 733 | compat_int_t wsize; |
| 734 | compat_int_t timeo; |
| 735 | compat_int_t retrans; |
| 736 | compat_int_t acregmin; |
| 737 | compat_int_t acregmax; |
| 738 | compat_int_t acdirmin; |
| 739 | compat_int_t acdirmax; |
| 740 | struct compat_nfs_string client_addr; |
| 741 | struct compat_nfs_string mnt_path; |
| 742 | struct compat_nfs_string hostname; |
| 743 | compat_uint_t host_addrlen; |
David Howells | 5fc3e62 | 2005-04-27 15:39:03 -0700 | [diff] [blame] | 744 | compat_uptr_t host_addr; |
David Howells | 9a9947b | 2005-04-18 10:54:51 -0700 | [diff] [blame] | 745 | compat_int_t proto; |
| 746 | compat_int_t auth_flavourlen; |
David Howells | 5fc3e62 | 2005-04-27 15:39:03 -0700 | [diff] [blame] | 747 | compat_uptr_t auth_flavours; |
David Howells | 9a9947b | 2005-04-18 10:54:51 -0700 | [diff] [blame] | 748 | }; |
| 749 | |
| 750 | static int do_nfs4_super_data_conv(void *raw_data) |
| 751 | { |
| 752 | int version = *(compat_uint_t *) raw_data; |
| 753 | |
| 754 | if (version == 1) { |
| 755 | struct compat_nfs4_mount_data_v1 *raw = raw_data; |
| 756 | struct nfs4_mount_data *real = raw_data; |
| 757 | |
| 758 | /* copy the fields backwards */ |
| 759 | real->auth_flavours = compat_ptr(raw->auth_flavours); |
| 760 | real->auth_flavourlen = raw->auth_flavourlen; |
| 761 | real->proto = raw->proto; |
| 762 | real->host_addr = compat_ptr(raw->host_addr); |
| 763 | real->host_addrlen = raw->host_addrlen; |
| 764 | compat_nfs_string(&real->hostname, &raw->hostname); |
| 765 | compat_nfs_string(&real->mnt_path, &raw->mnt_path); |
| 766 | compat_nfs_string(&real->client_addr, &raw->client_addr); |
| 767 | real->acdirmax = raw->acdirmax; |
| 768 | real->acdirmin = raw->acdirmin; |
| 769 | real->acregmax = raw->acregmax; |
| 770 | real->acregmin = raw->acregmin; |
| 771 | real->retrans = raw->retrans; |
| 772 | real->timeo = raw->timeo; |
| 773 | real->wsize = raw->wsize; |
| 774 | real->rsize = raw->rsize; |
| 775 | real->flags = raw->flags; |
| 776 | real->version = raw->version; |
| 777 | } |
David Howells | 9a9947b | 2005-04-18 10:54:51 -0700 | [diff] [blame] | 778 | |
| 779 | return 0; |
| 780 | } |
| 781 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 782 | #define NCPFS_NAME "ncpfs" |
David Howells | 9a9947b | 2005-04-18 10:54:51 -0700 | [diff] [blame] | 783 | #define NFS4_NAME "nfs4" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 784 | |
David Howells | c788732 | 2010-08-11 11:26:22 +0100 | [diff] [blame] | 785 | asmlinkage long compat_sys_mount(const char __user * dev_name, |
| 786 | const char __user * dir_name, |
| 787 | const char __user * type, unsigned long flags, |
| 788 | const void __user * data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 789 | { |
Vegard Nossum | eca6f53 | 2009-09-18 13:05:45 -0700 | [diff] [blame] | 790 | char *kernel_type; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 791 | unsigned long data_page; |
Vegard Nossum | eca6f53 | 2009-09-18 13:05:45 -0700 | [diff] [blame] | 792 | char *kernel_dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 793 | char *dir_page; |
| 794 | int retval; |
| 795 | |
Vegard Nossum | eca6f53 | 2009-09-18 13:05:45 -0700 | [diff] [blame] | 796 | retval = copy_mount_string(type, &kernel_type); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 797 | if (retval < 0) |
| 798 | goto out; |
| 799 | |
| 800 | dir_page = getname(dir_name); |
| 801 | retval = PTR_ERR(dir_page); |
| 802 | if (IS_ERR(dir_page)) |
| 803 | goto out1; |
| 804 | |
Vegard Nossum | eca6f53 | 2009-09-18 13:05:45 -0700 | [diff] [blame] | 805 | retval = copy_mount_string(dev_name, &kernel_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 806 | if (retval < 0) |
| 807 | goto out2; |
| 808 | |
Vegard Nossum | eca6f53 | 2009-09-18 13:05:45 -0700 | [diff] [blame] | 809 | retval = copy_mount_options(data, &data_page); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 810 | if (retval < 0) |
| 811 | goto out3; |
| 812 | |
| 813 | retval = -EINVAL; |
| 814 | |
Vegard Nossum | eca6f53 | 2009-09-18 13:05:45 -0700 | [diff] [blame] | 815 | if (kernel_type && data_page) { |
Arnd Bergmann | 2116b7a | 2010-10-04 22:55:57 +0200 | [diff] [blame] | 816 | if (!strcmp(kernel_type, NCPFS_NAME)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 817 | do_ncp_super_data_conv((void *)data_page); |
Vegard Nossum | eca6f53 | 2009-09-18 13:05:45 -0700 | [diff] [blame] | 818 | } else if (!strcmp(kernel_type, NFS4_NAME)) { |
David Howells | 9a9947b | 2005-04-18 10:54:51 -0700 | [diff] [blame] | 819 | if (do_nfs4_super_data_conv((void *) data_page)) |
| 820 | goto out4; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 821 | } |
| 822 | } |
| 823 | |
Vegard Nossum | eca6f53 | 2009-09-18 13:05:45 -0700 | [diff] [blame] | 824 | retval = do_mount(kernel_dev, dir_page, kernel_type, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 825 | flags, (void*)data_page); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 826 | |
David Howells | 9a9947b | 2005-04-18 10:54:51 -0700 | [diff] [blame] | 827 | out4: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 828 | free_page(data_page); |
| 829 | out3: |
Vegard Nossum | eca6f53 | 2009-09-18 13:05:45 -0700 | [diff] [blame] | 830 | kfree(kernel_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 831 | out2: |
| 832 | putname(dir_page); |
| 833 | out1: |
Vegard Nossum | eca6f53 | 2009-09-18 13:05:45 -0700 | [diff] [blame] | 834 | kfree(kernel_type); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 835 | out: |
| 836 | return retval; |
| 837 | } |
| 838 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 839 | struct compat_old_linux_dirent { |
| 840 | compat_ulong_t d_ino; |
| 841 | compat_ulong_t d_offset; |
| 842 | unsigned short d_namlen; |
| 843 | char d_name[1]; |
| 844 | }; |
| 845 | |
| 846 | struct compat_readdir_callback { |
| 847 | struct compat_old_linux_dirent __user *dirent; |
| 848 | int result; |
| 849 | }; |
| 850 | |
| 851 | static int compat_fillonedir(void *__buf, const char *name, int namlen, |
David Howells | afefdbb | 2006-10-03 01:13:46 -0700 | [diff] [blame] | 852 | loff_t offset, u64 ino, unsigned int d_type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 853 | { |
| 854 | struct compat_readdir_callback *buf = __buf; |
| 855 | struct compat_old_linux_dirent __user *dirent; |
David Howells | afefdbb | 2006-10-03 01:13:46 -0700 | [diff] [blame] | 856 | compat_ulong_t d_ino; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 857 | |
| 858 | if (buf->result) |
| 859 | return -EINVAL; |
David Howells | afefdbb | 2006-10-03 01:13:46 -0700 | [diff] [blame] | 860 | d_ino = ino; |
Al Viro | 8f3f655 | 2008-08-12 00:28:24 -0400 | [diff] [blame] | 861 | if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) { |
| 862 | buf->result = -EOVERFLOW; |
David Howells | afefdbb | 2006-10-03 01:13:46 -0700 | [diff] [blame] | 863 | return -EOVERFLOW; |
Al Viro | 8f3f655 | 2008-08-12 00:28:24 -0400 | [diff] [blame] | 864 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 865 | buf->result++; |
| 866 | dirent = buf->dirent; |
| 867 | if (!access_ok(VERIFY_WRITE, dirent, |
| 868 | (unsigned long)(dirent->d_name + namlen + 1) - |
| 869 | (unsigned long)dirent)) |
| 870 | goto efault; |
David Howells | afefdbb | 2006-10-03 01:13:46 -0700 | [diff] [blame] | 871 | if ( __put_user(d_ino, &dirent->d_ino) || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 872 | __put_user(offset, &dirent->d_offset) || |
| 873 | __put_user(namlen, &dirent->d_namlen) || |
| 874 | __copy_to_user(dirent->d_name, name, namlen) || |
| 875 | __put_user(0, dirent->d_name + namlen)) |
| 876 | goto efault; |
| 877 | return 0; |
| 878 | efault: |
| 879 | buf->result = -EFAULT; |
| 880 | return -EFAULT; |
| 881 | } |
| 882 | |
| 883 | asmlinkage long compat_sys_old_readdir(unsigned int fd, |
| 884 | struct compat_old_linux_dirent __user *dirent, unsigned int count) |
| 885 | { |
| 886 | int error; |
| 887 | struct file *file; |
| 888 | struct compat_readdir_callback buf; |
| 889 | |
| 890 | error = -EBADF; |
| 891 | file = fget(fd); |
| 892 | if (!file) |
| 893 | goto out; |
| 894 | |
| 895 | buf.result = 0; |
| 896 | buf.dirent = dirent; |
| 897 | |
| 898 | error = vfs_readdir(file, compat_fillonedir, &buf); |
Al Viro | 53c9c5c | 2008-08-24 07:29:52 -0400 | [diff] [blame] | 899 | if (buf.result) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 900 | error = buf.result; |
| 901 | |
| 902 | fput(file); |
| 903 | out: |
| 904 | return error; |
| 905 | } |
| 906 | |
| 907 | struct compat_linux_dirent { |
| 908 | compat_ulong_t d_ino; |
| 909 | compat_ulong_t d_off; |
| 910 | unsigned short d_reclen; |
| 911 | char d_name[1]; |
| 912 | }; |
| 913 | |
| 914 | struct compat_getdents_callback { |
| 915 | struct compat_linux_dirent __user *current_dir; |
| 916 | struct compat_linux_dirent __user *previous; |
| 917 | int count; |
| 918 | int error; |
| 919 | }; |
| 920 | |
| 921 | static int compat_filldir(void *__buf, const char *name, int namlen, |
David Howells | afefdbb | 2006-10-03 01:13:46 -0700 | [diff] [blame] | 922 | loff_t offset, u64 ino, unsigned int d_type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 923 | { |
| 924 | struct compat_linux_dirent __user * dirent; |
| 925 | struct compat_getdents_callback *buf = __buf; |
David Howells | afefdbb | 2006-10-03 01:13:46 -0700 | [diff] [blame] | 926 | compat_ulong_t d_ino; |
Kevin Winchester | 85c9fe8 | 2010-08-09 17:20:22 -0700 | [diff] [blame] | 927 | int reclen = ALIGN(offsetof(struct compat_linux_dirent, d_name) + |
| 928 | namlen + 2, sizeof(compat_long_t)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 929 | |
| 930 | buf->error = -EINVAL; /* only used if we fail.. */ |
| 931 | if (reclen > buf->count) |
| 932 | return -EINVAL; |
David Howells | afefdbb | 2006-10-03 01:13:46 -0700 | [diff] [blame] | 933 | d_ino = ino; |
Al Viro | 8f3f655 | 2008-08-12 00:28:24 -0400 | [diff] [blame] | 934 | if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) { |
| 935 | buf->error = -EOVERFLOW; |
David Howells | afefdbb | 2006-10-03 01:13:46 -0700 | [diff] [blame] | 936 | return -EOVERFLOW; |
Al Viro | 8f3f655 | 2008-08-12 00:28:24 -0400 | [diff] [blame] | 937 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 938 | dirent = buf->previous; |
| 939 | if (dirent) { |
| 940 | if (__put_user(offset, &dirent->d_off)) |
| 941 | goto efault; |
| 942 | } |
| 943 | dirent = buf->current_dir; |
David Howells | afefdbb | 2006-10-03 01:13:46 -0700 | [diff] [blame] | 944 | if (__put_user(d_ino, &dirent->d_ino)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 945 | goto efault; |
| 946 | if (__put_user(reclen, &dirent->d_reclen)) |
| 947 | goto efault; |
| 948 | if (copy_to_user(dirent->d_name, name, namlen)) |
| 949 | goto efault; |
| 950 | if (__put_user(0, dirent->d_name + namlen)) |
| 951 | goto efault; |
| 952 | if (__put_user(d_type, (char __user *) dirent + reclen - 1)) |
| 953 | goto efault; |
| 954 | buf->previous = dirent; |
| 955 | dirent = (void __user *)dirent + reclen; |
| 956 | buf->current_dir = dirent; |
| 957 | buf->count -= reclen; |
| 958 | return 0; |
| 959 | efault: |
| 960 | buf->error = -EFAULT; |
| 961 | return -EFAULT; |
| 962 | } |
| 963 | |
| 964 | asmlinkage long compat_sys_getdents(unsigned int fd, |
| 965 | struct compat_linux_dirent __user *dirent, unsigned int count) |
| 966 | { |
| 967 | struct file * file; |
| 968 | struct compat_linux_dirent __user * lastdirent; |
| 969 | struct compat_getdents_callback buf; |
| 970 | int error; |
| 971 | |
| 972 | error = -EFAULT; |
| 973 | if (!access_ok(VERIFY_WRITE, dirent, count)) |
| 974 | goto out; |
| 975 | |
| 976 | error = -EBADF; |
| 977 | file = fget(fd); |
| 978 | if (!file) |
| 979 | goto out; |
| 980 | |
| 981 | buf.current_dir = dirent; |
| 982 | buf.previous = NULL; |
| 983 | buf.count = count; |
| 984 | buf.error = 0; |
| 985 | |
| 986 | error = vfs_readdir(file, compat_filldir, &buf); |
Al Viro | 53c9c5c | 2008-08-24 07:29:52 -0400 | [diff] [blame] | 987 | if (error >= 0) |
| 988 | error = buf.error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 989 | lastdirent = buf.previous; |
| 990 | if (lastdirent) { |
| 991 | if (put_user(file->f_pos, &lastdirent->d_off)) |
| 992 | error = -EFAULT; |
| 993 | else |
| 994 | error = count - buf.count; |
| 995 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 996 | fput(file); |
| 997 | out: |
| 998 | return error; |
| 999 | } |
| 1000 | |
| 1001 | #ifndef __ARCH_OMIT_COMPAT_SYS_GETDENTS64 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1002 | |
| 1003 | struct compat_getdents_callback64 { |
| 1004 | struct linux_dirent64 __user *current_dir; |
| 1005 | struct linux_dirent64 __user *previous; |
| 1006 | int count; |
| 1007 | int error; |
| 1008 | }; |
| 1009 | |
| 1010 | static int compat_filldir64(void * __buf, const char * name, int namlen, loff_t offset, |
David Howells | afefdbb | 2006-10-03 01:13:46 -0700 | [diff] [blame] | 1011 | u64 ino, unsigned int d_type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1012 | { |
| 1013 | struct linux_dirent64 __user *dirent; |
| 1014 | struct compat_getdents_callback64 *buf = __buf; |
Kevin Winchester | 85c9fe8 | 2010-08-09 17:20:22 -0700 | [diff] [blame] | 1015 | int reclen = ALIGN(offsetof(struct linux_dirent64, d_name) + namlen + 1, |
| 1016 | sizeof(u64)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1017 | u64 off; |
| 1018 | |
| 1019 | buf->error = -EINVAL; /* only used if we fail.. */ |
| 1020 | if (reclen > buf->count) |
| 1021 | return -EINVAL; |
| 1022 | dirent = buf->previous; |
| 1023 | |
| 1024 | if (dirent) { |
| 1025 | if (__put_user_unaligned(offset, &dirent->d_off)) |
| 1026 | goto efault; |
| 1027 | } |
| 1028 | dirent = buf->current_dir; |
| 1029 | if (__put_user_unaligned(ino, &dirent->d_ino)) |
| 1030 | goto efault; |
| 1031 | off = 0; |
| 1032 | if (__put_user_unaligned(off, &dirent->d_off)) |
| 1033 | goto efault; |
| 1034 | if (__put_user(reclen, &dirent->d_reclen)) |
| 1035 | goto efault; |
| 1036 | if (__put_user(d_type, &dirent->d_type)) |
| 1037 | goto efault; |
| 1038 | if (copy_to_user(dirent->d_name, name, namlen)) |
| 1039 | goto efault; |
| 1040 | if (__put_user(0, dirent->d_name + namlen)) |
| 1041 | goto efault; |
| 1042 | buf->previous = dirent; |
| 1043 | dirent = (void __user *)dirent + reclen; |
| 1044 | buf->current_dir = dirent; |
| 1045 | buf->count -= reclen; |
| 1046 | return 0; |
| 1047 | efault: |
| 1048 | buf->error = -EFAULT; |
| 1049 | return -EFAULT; |
| 1050 | } |
| 1051 | |
| 1052 | asmlinkage long compat_sys_getdents64(unsigned int fd, |
| 1053 | struct linux_dirent64 __user * dirent, unsigned int count) |
| 1054 | { |
| 1055 | struct file * file; |
| 1056 | struct linux_dirent64 __user * lastdirent; |
| 1057 | struct compat_getdents_callback64 buf; |
| 1058 | int error; |
| 1059 | |
| 1060 | error = -EFAULT; |
| 1061 | if (!access_ok(VERIFY_WRITE, dirent, count)) |
| 1062 | goto out; |
| 1063 | |
| 1064 | error = -EBADF; |
| 1065 | file = fget(fd); |
| 1066 | if (!file) |
| 1067 | goto out; |
| 1068 | |
| 1069 | buf.current_dir = dirent; |
| 1070 | buf.previous = NULL; |
| 1071 | buf.count = count; |
| 1072 | buf.error = 0; |
| 1073 | |
| 1074 | error = vfs_readdir(file, compat_filldir64, &buf); |
Al Viro | 53c9c5c | 2008-08-24 07:29:52 -0400 | [diff] [blame] | 1075 | if (error >= 0) |
| 1076 | error = buf.error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1077 | lastdirent = buf.previous; |
| 1078 | if (lastdirent) { |
| 1079 | typeof(lastdirent->d_off) d_off = file->f_pos; |
Heiko Carstens | 7116e99 | 2006-12-06 20:36:36 -0800 | [diff] [blame] | 1080 | if (__put_user_unaligned(d_off, &lastdirent->d_off)) |
Al Viro | 53c9c5c | 2008-08-24 07:29:52 -0400 | [diff] [blame] | 1081 | error = -EFAULT; |
| 1082 | else |
| 1083 | error = count - buf.count; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1084 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1085 | fput(file); |
| 1086 | out: |
| 1087 | return error; |
| 1088 | } |
| 1089 | #endif /* ! __ARCH_OMIT_COMPAT_SYS_GETDENTS64 */ |
| 1090 | |
| 1091 | static ssize_t compat_do_readv_writev(int type, struct file *file, |
| 1092 | const struct compat_iovec __user *uvector, |
| 1093 | unsigned long nr_segs, loff_t *pos) |
| 1094 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1095 | compat_ssize_t tot_len; |
| 1096 | struct iovec iovstack[UIO_FASTIOV]; |
Dan Rosenberg | 767b68e | 2010-09-22 14:32:56 -0400 | [diff] [blame] | 1097 | struct iovec *iov = iovstack; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1098 | ssize_t ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1099 | io_fn_t fn; |
| 1100 | iov_fn_t fnv; |
| 1101 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1102 | ret = -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1103 | if (!file->f_op) |
| 1104 | goto out; |
Jeff Moyer | b837336 | 2010-05-26 14:44:25 -0700 | [diff] [blame] | 1105 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1106 | ret = -EFAULT; |
| 1107 | if (!access_ok(VERIFY_READ, uvector, nr_segs*sizeof(*uvector))) |
| 1108 | goto out; |
| 1109 | |
Jeff Moyer | b837336 | 2010-05-26 14:44:25 -0700 | [diff] [blame] | 1110 | tot_len = compat_rw_copy_check_uvector(type, uvector, nr_segs, |
| 1111 | UIO_FASTIOV, iovstack, &iov); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1112 | if (tot_len == 0) { |
| 1113 | ret = 0; |
| 1114 | goto out; |
| 1115 | } |
| 1116 | |
| 1117 | ret = rw_verify_area(type, file, pos, tot_len); |
Linus Torvalds | e28cc71 | 2006-01-04 16:20:40 -0800 | [diff] [blame] | 1118 | if (ret < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1119 | goto out; |
| 1120 | |
| 1121 | fnv = NULL; |
| 1122 | if (type == READ) { |
| 1123 | fn = file->f_op->read; |
Badari Pulavarty | ee0b3e6 | 2006-09-30 23:28:47 -0700 | [diff] [blame] | 1124 | fnv = file->f_op->aio_read; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1125 | } else { |
| 1126 | fn = (io_fn_t)file->f_op->write; |
Badari Pulavarty | ee0b3e6 | 2006-09-30 23:28:47 -0700 | [diff] [blame] | 1127 | fnv = file->f_op->aio_write; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1128 | } |
| 1129 | |
Badari Pulavarty | ee0b3e6 | 2006-09-30 23:28:47 -0700 | [diff] [blame] | 1130 | if (fnv) |
| 1131 | ret = do_sync_readv_writev(file, iov, nr_segs, tot_len, |
| 1132 | pos, fnv); |
| 1133 | else |
| 1134 | ret = do_loop_readv_writev(file, iov, nr_segs, pos, fn); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1135 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1136 | out: |
| 1137 | if (iov != iovstack) |
| 1138 | kfree(iov); |
Robert Love | 0eeca28 | 2005-07-12 17:06:03 -0400 | [diff] [blame] | 1139 | if ((ret + (type == READ)) > 0) { |
Robert Love | 0eeca28 | 2005-07-12 17:06:03 -0400 | [diff] [blame] | 1140 | if (type == READ) |
Eric Paris | 2a12a9d | 2009-12-17 21:24:21 -0500 | [diff] [blame] | 1141 | fsnotify_access(file); |
Robert Love | 0eeca28 | 2005-07-12 17:06:03 -0400 | [diff] [blame] | 1142 | else |
Eric Paris | 2a12a9d | 2009-12-17 21:24:21 -0500 | [diff] [blame] | 1143 | fsnotify_modify(file); |
Robert Love | 0eeca28 | 2005-07-12 17:06:03 -0400 | [diff] [blame] | 1144 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1145 | return ret; |
| 1146 | } |
| 1147 | |
Gerd Hoffmann | dac1213 | 2009-04-02 16:59:20 -0700 | [diff] [blame] | 1148 | static size_t compat_readv(struct file *file, |
| 1149 | const struct compat_iovec __user *vec, |
| 1150 | unsigned long vlen, loff_t *pos) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1151 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1152 | ssize_t ret = -EBADF; |
| 1153 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1154 | if (!(file->f_mode & FMODE_READ)) |
| 1155 | goto out; |
| 1156 | |
| 1157 | ret = -EINVAL; |
Badari Pulavarty | ee0b3e6 | 2006-09-30 23:28:47 -0700 | [diff] [blame] | 1158 | if (!file->f_op || (!file->f_op->aio_read && !file->f_op->read)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1159 | goto out; |
| 1160 | |
Gerd Hoffmann | dac1213 | 2009-04-02 16:59:20 -0700 | [diff] [blame] | 1161 | ret = compat_do_readv_writev(READ, file, vec, vlen, pos); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1162 | |
| 1163 | out: |
Gerd Hoffmann | ca8a5bd | 2009-01-06 14:41:09 -0800 | [diff] [blame] | 1164 | if (ret > 0) |
| 1165 | add_rchar(current, ret); |
| 1166 | inc_syscr(current); |
Gerd Hoffmann | dac1213 | 2009-04-02 16:59:20 -0700 | [diff] [blame] | 1167 | return ret; |
| 1168 | } |
| 1169 | |
| 1170 | asmlinkage ssize_t |
| 1171 | compat_sys_readv(unsigned long fd, const struct compat_iovec __user *vec, |
| 1172 | unsigned long vlen) |
| 1173 | { |
| 1174 | struct file *file; |
Gerd Hoffmann | 10c7db2 | 2009-04-02 16:59:25 -0700 | [diff] [blame] | 1175 | int fput_needed; |
Gerd Hoffmann | dac1213 | 2009-04-02 16:59:20 -0700 | [diff] [blame] | 1176 | ssize_t ret; |
| 1177 | |
Gerd Hoffmann | 10c7db2 | 2009-04-02 16:59:25 -0700 | [diff] [blame] | 1178 | file = fget_light(fd, &fput_needed); |
Gerd Hoffmann | dac1213 | 2009-04-02 16:59:20 -0700 | [diff] [blame] | 1179 | if (!file) |
| 1180 | return -EBADF; |
| 1181 | ret = compat_readv(file, vec, vlen, &file->f_pos); |
Gerd Hoffmann | 10c7db2 | 2009-04-02 16:59:25 -0700 | [diff] [blame] | 1182 | fput_light(file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1183 | return ret; |
| 1184 | } |
| 1185 | |
Gerd Hoffmann | f3554f4 | 2009-04-02 16:59:23 -0700 | [diff] [blame] | 1186 | asmlinkage ssize_t |
| 1187 | compat_sys_preadv(unsigned long fd, const struct compat_iovec __user *vec, |
Linus Torvalds | 601cc11 | 2009-04-03 08:03:22 -0700 | [diff] [blame] | 1188 | unsigned long vlen, u32 pos_low, u32 pos_high) |
Gerd Hoffmann | f3554f4 | 2009-04-02 16:59:23 -0700 | [diff] [blame] | 1189 | { |
| 1190 | loff_t pos = ((loff_t)pos_high << 32) | pos_low; |
| 1191 | struct file *file; |
Gerd Hoffmann | 10c7db2 | 2009-04-02 16:59:25 -0700 | [diff] [blame] | 1192 | int fput_needed; |
Gerd Hoffmann | f3554f4 | 2009-04-02 16:59:23 -0700 | [diff] [blame] | 1193 | ssize_t ret; |
| 1194 | |
| 1195 | if (pos < 0) |
| 1196 | return -EINVAL; |
Gerd Hoffmann | 10c7db2 | 2009-04-02 16:59:25 -0700 | [diff] [blame] | 1197 | file = fget_light(fd, &fput_needed); |
Gerd Hoffmann | f3554f4 | 2009-04-02 16:59:23 -0700 | [diff] [blame] | 1198 | if (!file) |
| 1199 | return -EBADF; |
Al Viro | 586ce09 | 2011-03-13 01:50:58 -0500 | [diff] [blame] | 1200 | ret = -ESPIPE; |
| 1201 | if (file->f_mode & FMODE_PREAD) |
| 1202 | ret = compat_readv(file, vec, vlen, &pos); |
Gerd Hoffmann | 10c7db2 | 2009-04-02 16:59:25 -0700 | [diff] [blame] | 1203 | fput_light(file, fput_needed); |
Gerd Hoffmann | f3554f4 | 2009-04-02 16:59:23 -0700 | [diff] [blame] | 1204 | return ret; |
| 1205 | } |
| 1206 | |
Gerd Hoffmann | 6949a63 | 2009-04-02 16:59:21 -0700 | [diff] [blame] | 1207 | static size_t compat_writev(struct file *file, |
| 1208 | const struct compat_iovec __user *vec, |
| 1209 | unsigned long vlen, loff_t *pos) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1210 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1211 | ssize_t ret = -EBADF; |
| 1212 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1213 | if (!(file->f_mode & FMODE_WRITE)) |
| 1214 | goto out; |
| 1215 | |
| 1216 | ret = -EINVAL; |
Badari Pulavarty | ee0b3e6 | 2006-09-30 23:28:47 -0700 | [diff] [blame] | 1217 | if (!file->f_op || (!file->f_op->aio_write && !file->f_op->write)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1218 | goto out; |
| 1219 | |
Gerd Hoffmann | 6949a63 | 2009-04-02 16:59:21 -0700 | [diff] [blame] | 1220 | ret = compat_do_readv_writev(WRITE, file, vec, vlen, pos); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1221 | |
| 1222 | out: |
Gerd Hoffmann | ca8a5bd | 2009-01-06 14:41:09 -0800 | [diff] [blame] | 1223 | if (ret > 0) |
| 1224 | add_wchar(current, ret); |
| 1225 | inc_syscw(current); |
Gerd Hoffmann | 6949a63 | 2009-04-02 16:59:21 -0700 | [diff] [blame] | 1226 | return ret; |
| 1227 | } |
| 1228 | |
| 1229 | asmlinkage ssize_t |
| 1230 | compat_sys_writev(unsigned long fd, const struct compat_iovec __user *vec, |
| 1231 | unsigned long vlen) |
| 1232 | { |
| 1233 | struct file *file; |
Gerd Hoffmann | 10c7db2 | 2009-04-02 16:59:25 -0700 | [diff] [blame] | 1234 | int fput_needed; |
Gerd Hoffmann | 6949a63 | 2009-04-02 16:59:21 -0700 | [diff] [blame] | 1235 | ssize_t ret; |
| 1236 | |
Gerd Hoffmann | 10c7db2 | 2009-04-02 16:59:25 -0700 | [diff] [blame] | 1237 | file = fget_light(fd, &fput_needed); |
Gerd Hoffmann | 6949a63 | 2009-04-02 16:59:21 -0700 | [diff] [blame] | 1238 | if (!file) |
| 1239 | return -EBADF; |
| 1240 | ret = compat_writev(file, vec, vlen, &file->f_pos); |
Gerd Hoffmann | 10c7db2 | 2009-04-02 16:59:25 -0700 | [diff] [blame] | 1241 | fput_light(file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1242 | return ret; |
| 1243 | } |
| 1244 | |
Gerd Hoffmann | f3554f4 | 2009-04-02 16:59:23 -0700 | [diff] [blame] | 1245 | asmlinkage ssize_t |
| 1246 | compat_sys_pwritev(unsigned long fd, const struct compat_iovec __user *vec, |
Linus Torvalds | 601cc11 | 2009-04-03 08:03:22 -0700 | [diff] [blame] | 1247 | unsigned long vlen, u32 pos_low, u32 pos_high) |
Gerd Hoffmann | f3554f4 | 2009-04-02 16:59:23 -0700 | [diff] [blame] | 1248 | { |
| 1249 | loff_t pos = ((loff_t)pos_high << 32) | pos_low; |
| 1250 | struct file *file; |
Gerd Hoffmann | 10c7db2 | 2009-04-02 16:59:25 -0700 | [diff] [blame] | 1251 | int fput_needed; |
Gerd Hoffmann | f3554f4 | 2009-04-02 16:59:23 -0700 | [diff] [blame] | 1252 | ssize_t ret; |
| 1253 | |
| 1254 | if (pos < 0) |
| 1255 | return -EINVAL; |
Gerd Hoffmann | 10c7db2 | 2009-04-02 16:59:25 -0700 | [diff] [blame] | 1256 | file = fget_light(fd, &fput_needed); |
Gerd Hoffmann | f3554f4 | 2009-04-02 16:59:23 -0700 | [diff] [blame] | 1257 | if (!file) |
| 1258 | return -EBADF; |
Al Viro | 586ce09 | 2011-03-13 01:50:58 -0500 | [diff] [blame] | 1259 | ret = -ESPIPE; |
| 1260 | if (file->f_mode & FMODE_PWRITE) |
| 1261 | ret = compat_writev(file, vec, vlen, &pos); |
Gerd Hoffmann | 10c7db2 | 2009-04-02 16:59:25 -0700 | [diff] [blame] | 1262 | fput_light(file, fput_needed); |
Gerd Hoffmann | f3554f4 | 2009-04-02 16:59:23 -0700 | [diff] [blame] | 1263 | return ret; |
| 1264 | } |
| 1265 | |
Andi Kleen | d261020 | 2006-05-01 12:15:48 -0700 | [diff] [blame] | 1266 | asmlinkage long |
| 1267 | compat_sys_vmsplice(int fd, const struct compat_iovec __user *iov32, |
| 1268 | unsigned int nr_segs, unsigned int flags) |
| 1269 | { |
| 1270 | unsigned i; |
Al Viro | 90cbad6 | 2006-10-10 22:44:17 +0100 | [diff] [blame] | 1271 | struct iovec __user *iov; |
Jens Axboe | 98232d5 | 2006-05-04 09:13:49 +0200 | [diff] [blame] | 1272 | if (nr_segs > UIO_MAXIOV) |
Andi Kleen | d261020 | 2006-05-01 12:15:48 -0700 | [diff] [blame] | 1273 | return -EINVAL; |
| 1274 | iov = compat_alloc_user_space(nr_segs * sizeof(struct iovec)); |
| 1275 | for (i = 0; i < nr_segs; i++) { |
| 1276 | struct compat_iovec v; |
| 1277 | if (get_user(v.iov_base, &iov32[i].iov_base) || |
| 1278 | get_user(v.iov_len, &iov32[i].iov_len) || |
| 1279 | put_user(compat_ptr(v.iov_base), &iov[i].iov_base) || |
| 1280 | put_user(v.iov_len, &iov[i].iov_len)) |
| 1281 | return -EFAULT; |
| 1282 | } |
| 1283 | return sys_vmsplice(fd, iov, nr_segs, flags); |
| 1284 | } |
| 1285 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1286 | /* |
Miklos Szeredi | e922efc | 2005-09-06 15:18:25 -0700 | [diff] [blame] | 1287 | * Exactly like fs/open.c:sys_open(), except that it doesn't set the |
| 1288 | * O_LARGEFILE flag. |
| 1289 | */ |
| 1290 | asmlinkage long |
| 1291 | compat_sys_open(const char __user *filename, int flags, int mode) |
| 1292 | { |
Ulrich Drepper | 5590ff0 | 2006-01-18 17:43:53 -0800 | [diff] [blame] | 1293 | return do_sys_open(AT_FDCWD, filename, flags, mode); |
| 1294 | } |
| 1295 | |
| 1296 | /* |
| 1297 | * Exactly like fs/open.c:sys_openat(), except that it doesn't set the |
| 1298 | * O_LARGEFILE flag. |
| 1299 | */ |
| 1300 | asmlinkage long |
Stephen Rothwell | 9ad11ab | 2006-02-02 16:11:51 +1100 | [diff] [blame] | 1301 | compat_sys_openat(unsigned int dfd, const char __user *filename, int flags, int mode) |
Ulrich Drepper | 5590ff0 | 2006-01-18 17:43:53 -0800 | [diff] [blame] | 1302 | { |
| 1303 | return do_sys_open(dfd, filename, flags, mode); |
Miklos Szeredi | e922efc | 2005-09-06 15:18:25 -0700 | [diff] [blame] | 1304 | } |
| 1305 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1306 | #define __COMPAT_NFDBITS (8 * sizeof(compat_ulong_t)) |
| 1307 | |
Thomas Gleixner | b773ad4 | 2008-08-31 08:16:57 -0700 | [diff] [blame] | 1308 | static int poll_select_copy_remaining(struct timespec *end_time, void __user *p, |
| 1309 | int timeval, int ret) |
| 1310 | { |
| 1311 | struct timespec ts; |
| 1312 | |
| 1313 | if (!p) |
| 1314 | return ret; |
| 1315 | |
| 1316 | if (current->personality & STICKY_TIMEOUTS) |
| 1317 | goto sticky; |
| 1318 | |
| 1319 | /* No update for zero timeout */ |
| 1320 | if (!end_time->tv_sec && !end_time->tv_nsec) |
| 1321 | return ret; |
| 1322 | |
| 1323 | ktime_get_ts(&ts); |
| 1324 | ts = timespec_sub(*end_time, ts); |
| 1325 | if (ts.tv_sec < 0) |
| 1326 | ts.tv_sec = ts.tv_nsec = 0; |
| 1327 | |
| 1328 | if (timeval) { |
| 1329 | struct compat_timeval rtv; |
| 1330 | |
| 1331 | rtv.tv_sec = ts.tv_sec; |
| 1332 | rtv.tv_usec = ts.tv_nsec / NSEC_PER_USEC; |
| 1333 | |
| 1334 | if (!copy_to_user(p, &rtv, sizeof(rtv))) |
| 1335 | return ret; |
| 1336 | } else { |
| 1337 | struct compat_timespec rts; |
| 1338 | |
| 1339 | rts.tv_sec = ts.tv_sec; |
| 1340 | rts.tv_nsec = ts.tv_nsec; |
| 1341 | |
| 1342 | if (!copy_to_user(p, &rts, sizeof(rts))) |
| 1343 | return ret; |
| 1344 | } |
| 1345 | /* |
| 1346 | * If an application puts its timeval in read-only memory, we |
| 1347 | * don't want the Linux-specific update to the timeval to |
| 1348 | * cause a fault after the select has completed |
| 1349 | * successfully. However, because we're not updating the |
| 1350 | * timeval, we can't restart the system call. |
| 1351 | */ |
| 1352 | |
| 1353 | sticky: |
| 1354 | if (ret == -ERESTARTNOHAND) |
| 1355 | ret = -EINTR; |
| 1356 | return ret; |
| 1357 | } |
| 1358 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1359 | /* |
| 1360 | * Ooo, nasty. We need here to frob 32-bit unsigned longs to |
| 1361 | * 64-bit unsigned longs. |
| 1362 | */ |
Arjan van de Ven | 858119e | 2006-01-14 13:20:43 -0800 | [diff] [blame] | 1363 | static |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1364 | int compat_get_fd_set(unsigned long nr, compat_ulong_t __user *ufdset, |
| 1365 | unsigned long *fdset) |
| 1366 | { |
Milind Arun Choudhary | 022a169 | 2007-05-08 00:29:02 -0700 | [diff] [blame] | 1367 | nr = DIV_ROUND_UP(nr, __COMPAT_NFDBITS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1368 | if (ufdset) { |
| 1369 | unsigned long odd; |
| 1370 | |
| 1371 | if (!access_ok(VERIFY_WRITE, ufdset, nr*sizeof(compat_ulong_t))) |
| 1372 | return -EFAULT; |
| 1373 | |
| 1374 | odd = nr & 1UL; |
| 1375 | nr &= ~1UL; |
| 1376 | while (nr) { |
| 1377 | unsigned long h, l; |
Heiko Carstens | 7116e99 | 2006-12-06 20:36:36 -0800 | [diff] [blame] | 1378 | if (__get_user(l, ufdset) || __get_user(h, ufdset+1)) |
| 1379 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1380 | ufdset += 2; |
| 1381 | *fdset++ = h << 32 | l; |
| 1382 | nr -= 2; |
| 1383 | } |
Heiko Carstens | 7116e99 | 2006-12-06 20:36:36 -0800 | [diff] [blame] | 1384 | if (odd && __get_user(*fdset, ufdset)) |
| 1385 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1386 | } else { |
| 1387 | /* Tricky, must clear full unsigned long in the |
| 1388 | * kernel fdset at the end, this makes sure that |
| 1389 | * actually happens. |
| 1390 | */ |
| 1391 | memset(fdset, 0, ((nr + 1) & ~1)*sizeof(compat_ulong_t)); |
| 1392 | } |
| 1393 | return 0; |
| 1394 | } |
| 1395 | |
Arjan van de Ven | 858119e | 2006-01-14 13:20:43 -0800 | [diff] [blame] | 1396 | static |
Heiko Carstens | 7116e99 | 2006-12-06 20:36:36 -0800 | [diff] [blame] | 1397 | int compat_set_fd_set(unsigned long nr, compat_ulong_t __user *ufdset, |
| 1398 | unsigned long *fdset) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1399 | { |
| 1400 | unsigned long odd; |
Milind Arun Choudhary | 022a169 | 2007-05-08 00:29:02 -0700 | [diff] [blame] | 1401 | nr = DIV_ROUND_UP(nr, __COMPAT_NFDBITS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1402 | |
| 1403 | if (!ufdset) |
Heiko Carstens | 7116e99 | 2006-12-06 20:36:36 -0800 | [diff] [blame] | 1404 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1405 | |
| 1406 | odd = nr & 1UL; |
| 1407 | nr &= ~1UL; |
| 1408 | while (nr) { |
| 1409 | unsigned long h, l; |
| 1410 | l = *fdset++; |
| 1411 | h = l >> 32; |
Heiko Carstens | 7116e99 | 2006-12-06 20:36:36 -0800 | [diff] [blame] | 1412 | if (__put_user(l, ufdset) || __put_user(h, ufdset+1)) |
| 1413 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1414 | ufdset += 2; |
| 1415 | nr -= 2; |
| 1416 | } |
Heiko Carstens | 7116e99 | 2006-12-06 20:36:36 -0800 | [diff] [blame] | 1417 | if (odd && __put_user(*fdset, ufdset)) |
| 1418 | return -EFAULT; |
| 1419 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1420 | } |
| 1421 | |
| 1422 | |
| 1423 | /* |
| 1424 | * This is a virtual copy of sys_select from fs/select.c and probably |
| 1425 | * should be compared to it from time to time |
| 1426 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1427 | |
| 1428 | /* |
| 1429 | * We can actually return ERESTARTSYS instead of EINTR, but I'd |
| 1430 | * like to be certain this leads to no problems. So I return |
| 1431 | * EINTR just for safety. |
| 1432 | * |
| 1433 | * Update: ERESTARTSYS breaks at least the xview clock binary, so |
| 1434 | * I'm trying ERESTARTNOHAND which restart only when you want to. |
| 1435 | */ |
David Woodhouse | 9f72949 | 2006-01-18 17:44:05 -0800 | [diff] [blame] | 1436 | int compat_core_sys_select(int n, compat_ulong_t __user *inp, |
Arjan van de Ven | 8ff3e8e | 2008-08-31 08:26:40 -0700 | [diff] [blame] | 1437 | compat_ulong_t __user *outp, compat_ulong_t __user *exp, |
| 1438 | struct timespec *end_time) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1439 | { |
| 1440 | fd_set_bits fds; |
Badari Pulavarty | 6087b2d | 2007-05-23 13:57:45 -0700 | [diff] [blame] | 1441 | void *bits; |
Vadim Lobanov | bbea9f6 | 2006-12-10 02:21:12 -0800 | [diff] [blame] | 1442 | int size, max_fds, ret = -EINVAL; |
Linus Torvalds | a4531ed | 2005-09-09 15:10:52 -0700 | [diff] [blame] | 1443 | struct fdtable *fdt; |
Badari Pulavarty | 6087b2d | 2007-05-23 13:57:45 -0700 | [diff] [blame] | 1444 | long stack_fds[SELECT_STACK_ALLOC/sizeof(long)]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1445 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1446 | if (n < 0) |
| 1447 | goto out_nofds; |
| 1448 | |
Vadim Lobanov | bbea9f6 | 2006-12-10 02:21:12 -0800 | [diff] [blame] | 1449 | /* max_fds can increase, so grab it once to avoid race */ |
Linus Torvalds | ac5b8b6 | 2005-09-09 15:42:34 -0700 | [diff] [blame] | 1450 | rcu_read_lock(); |
Linus Torvalds | a4531ed | 2005-09-09 15:10:52 -0700 | [diff] [blame] | 1451 | fdt = files_fdtable(current->files); |
Vadim Lobanov | bbea9f6 | 2006-12-10 02:21:12 -0800 | [diff] [blame] | 1452 | max_fds = fdt->max_fds; |
Linus Torvalds | ac5b8b6 | 2005-09-09 15:42:34 -0700 | [diff] [blame] | 1453 | rcu_read_unlock(); |
Vadim Lobanov | bbea9f6 | 2006-12-10 02:21:12 -0800 | [diff] [blame] | 1454 | if (n > max_fds) |
| 1455 | n = max_fds; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1456 | |
| 1457 | /* |
| 1458 | * We need 6 bitmaps (in/out/ex for both incoming and outgoing), |
| 1459 | * since we used fdset we need to allocate memory in units of |
| 1460 | * long-words. |
| 1461 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1462 | size = FDS_BYTES(n); |
Badari Pulavarty | 6087b2d | 2007-05-23 13:57:45 -0700 | [diff] [blame] | 1463 | bits = stack_fds; |
| 1464 | if (size > sizeof(stack_fds) / 6) { |
| 1465 | bits = kmalloc(6 * size, GFP_KERNEL); |
| 1466 | ret = -ENOMEM; |
| 1467 | if (!bits) |
| 1468 | goto out_nofds; |
| 1469 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1470 | fds.in = (unsigned long *) bits; |
| 1471 | fds.out = (unsigned long *) (bits + size); |
| 1472 | fds.ex = (unsigned long *) (bits + 2*size); |
| 1473 | fds.res_in = (unsigned long *) (bits + 3*size); |
| 1474 | fds.res_out = (unsigned long *) (bits + 4*size); |
| 1475 | fds.res_ex = (unsigned long *) (bits + 5*size); |
| 1476 | |
| 1477 | if ((ret = compat_get_fd_set(n, inp, fds.in)) || |
| 1478 | (ret = compat_get_fd_set(n, outp, fds.out)) || |
| 1479 | (ret = compat_get_fd_set(n, exp, fds.ex))) |
| 1480 | goto out; |
| 1481 | zero_fd_set(n, fds.res_in); |
| 1482 | zero_fd_set(n, fds.res_out); |
| 1483 | zero_fd_set(n, fds.res_ex); |
| 1484 | |
Arjan van de Ven | 8ff3e8e | 2008-08-31 08:26:40 -0700 | [diff] [blame] | 1485 | ret = do_select(n, &fds, end_time); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1486 | |
| 1487 | if (ret < 0) |
| 1488 | goto out; |
| 1489 | if (!ret) { |
| 1490 | ret = -ERESTARTNOHAND; |
| 1491 | if (signal_pending(current)) |
| 1492 | goto out; |
| 1493 | ret = 0; |
| 1494 | } |
| 1495 | |
Heiko Carstens | 7116e99 | 2006-12-06 20:36:36 -0800 | [diff] [blame] | 1496 | if (compat_set_fd_set(n, inp, fds.res_in) || |
| 1497 | compat_set_fd_set(n, outp, fds.res_out) || |
| 1498 | compat_set_fd_set(n, exp, fds.res_ex)) |
| 1499 | ret = -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1500 | out: |
Badari Pulavarty | 6087b2d | 2007-05-23 13:57:45 -0700 | [diff] [blame] | 1501 | if (bits != stack_fds) |
| 1502 | kfree(bits); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1503 | out_nofds: |
| 1504 | return ret; |
| 1505 | } |
| 1506 | |
David Woodhouse | 9f72949 | 2006-01-18 17:44:05 -0800 | [diff] [blame] | 1507 | asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp, |
| 1508 | compat_ulong_t __user *outp, compat_ulong_t __user *exp, |
| 1509 | struct compat_timeval __user *tvp) |
| 1510 | { |
Arjan van de Ven | 8ff3e8e | 2008-08-31 08:26:40 -0700 | [diff] [blame] | 1511 | struct timespec end_time, *to = NULL; |
David Woodhouse | 9f72949 | 2006-01-18 17:44:05 -0800 | [diff] [blame] | 1512 | struct compat_timeval tv; |
| 1513 | int ret; |
| 1514 | |
| 1515 | if (tvp) { |
| 1516 | if (copy_from_user(&tv, tvp, sizeof(tv))) |
| 1517 | return -EFAULT; |
| 1518 | |
Arjan van de Ven | 8ff3e8e | 2008-08-31 08:26:40 -0700 | [diff] [blame] | 1519 | to = &end_time; |
Arjan van de Ven | 4d36a9e | 2008-10-25 12:41:41 -0700 | [diff] [blame] | 1520 | if (poll_select_set_timeout(to, |
| 1521 | tv.tv_sec + (tv.tv_usec / USEC_PER_SEC), |
| 1522 | (tv.tv_usec % USEC_PER_SEC) * NSEC_PER_USEC)) |
David Woodhouse | 9f72949 | 2006-01-18 17:44:05 -0800 | [diff] [blame] | 1523 | return -EINVAL; |
David Woodhouse | 9f72949 | 2006-01-18 17:44:05 -0800 | [diff] [blame] | 1524 | } |
| 1525 | |
Arjan van de Ven | 8ff3e8e | 2008-08-31 08:26:40 -0700 | [diff] [blame] | 1526 | ret = compat_core_sys_select(n, inp, outp, exp, to); |
| 1527 | ret = poll_select_copy_remaining(&end_time, tvp, 1, ret); |
David Woodhouse | 9f72949 | 2006-01-18 17:44:05 -0800 | [diff] [blame] | 1528 | |
| 1529 | return ret; |
| 1530 | } |
| 1531 | |
Christoph Hellwig | 5d0e528 | 2010-03-10 15:21:13 -0800 | [diff] [blame] | 1532 | struct compat_sel_arg_struct { |
| 1533 | compat_ulong_t n; |
| 1534 | compat_uptr_t inp; |
| 1535 | compat_uptr_t outp; |
| 1536 | compat_uptr_t exp; |
| 1537 | compat_uptr_t tvp; |
| 1538 | }; |
| 1539 | |
| 1540 | asmlinkage long compat_sys_old_select(struct compat_sel_arg_struct __user *arg) |
| 1541 | { |
| 1542 | struct compat_sel_arg_struct a; |
| 1543 | |
| 1544 | if (copy_from_user(&a, arg, sizeof(a))) |
| 1545 | return -EFAULT; |
| 1546 | return compat_sys_select(a.n, compat_ptr(a.inp), compat_ptr(a.outp), |
| 1547 | compat_ptr(a.exp), compat_ptr(a.tvp)); |
| 1548 | } |
| 1549 | |
Roland McGrath | f3de272 | 2008-04-30 00:53:09 -0700 | [diff] [blame] | 1550 | #ifdef HAVE_SET_RESTORE_SIGMASK |
Heiko Carstens | c9da9f2 | 2009-01-14 14:13:57 +0100 | [diff] [blame] | 1551 | static long do_compat_pselect(int n, compat_ulong_t __user *inp, |
David Woodhouse | 9f72949 | 2006-01-18 17:44:05 -0800 | [diff] [blame] | 1552 | compat_ulong_t __user *outp, compat_ulong_t __user *exp, |
| 1553 | struct compat_timespec __user *tsp, compat_sigset_t __user *sigmask, |
| 1554 | compat_size_t sigsetsize) |
| 1555 | { |
| 1556 | compat_sigset_t ss32; |
| 1557 | sigset_t ksigmask, sigsaved; |
David Woodhouse | 9f72949 | 2006-01-18 17:44:05 -0800 | [diff] [blame] | 1558 | struct compat_timespec ts; |
Arjan van de Ven | 8ff3e8e | 2008-08-31 08:26:40 -0700 | [diff] [blame] | 1559 | struct timespec end_time, *to = NULL; |
David Woodhouse | 9f72949 | 2006-01-18 17:44:05 -0800 | [diff] [blame] | 1560 | int ret; |
| 1561 | |
| 1562 | if (tsp) { |
| 1563 | if (copy_from_user(&ts, tsp, sizeof(ts))) |
| 1564 | return -EFAULT; |
| 1565 | |
Arjan van de Ven | 8ff3e8e | 2008-08-31 08:26:40 -0700 | [diff] [blame] | 1566 | to = &end_time; |
| 1567 | if (poll_select_set_timeout(to, ts.tv_sec, ts.tv_nsec)) |
David Woodhouse | 9f72949 | 2006-01-18 17:44:05 -0800 | [diff] [blame] | 1568 | return -EINVAL; |
| 1569 | } |
| 1570 | |
| 1571 | if (sigmask) { |
| 1572 | if (sigsetsize != sizeof(compat_sigset_t)) |
| 1573 | return -EINVAL; |
| 1574 | if (copy_from_user(&ss32, sigmask, sizeof(ss32))) |
| 1575 | return -EFAULT; |
| 1576 | sigset_from_compat(&ksigmask, &ss32); |
| 1577 | |
| 1578 | sigdelsetmask(&ksigmask, sigmask(SIGKILL)|sigmask(SIGSTOP)); |
| 1579 | sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved); |
| 1580 | } |
| 1581 | |
Arjan van de Ven | 8ff3e8e | 2008-08-31 08:26:40 -0700 | [diff] [blame] | 1582 | ret = compat_core_sys_select(n, inp, outp, exp, to); |
| 1583 | ret = poll_select_copy_remaining(&end_time, tsp, 0, ret); |
David Woodhouse | 9f72949 | 2006-01-18 17:44:05 -0800 | [diff] [blame] | 1584 | |
| 1585 | if (ret == -ERESTARTNOHAND) { |
| 1586 | /* |
| 1587 | * Don't restore the signal mask yet. Let do_signal() deliver |
| 1588 | * the signal on the way back to userspace, before the signal |
| 1589 | * mask is restored. |
| 1590 | */ |
| 1591 | if (sigmask) { |
| 1592 | memcpy(¤t->saved_sigmask, &sigsaved, |
| 1593 | sizeof(sigsaved)); |
Roland McGrath | 4e4c22c | 2008-04-30 00:53:06 -0700 | [diff] [blame] | 1594 | set_restore_sigmask(); |
David Woodhouse | 9f72949 | 2006-01-18 17:44:05 -0800 | [diff] [blame] | 1595 | } |
| 1596 | } else if (sigmask) |
| 1597 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); |
| 1598 | |
| 1599 | return ret; |
| 1600 | } |
| 1601 | |
| 1602 | asmlinkage long compat_sys_pselect6(int n, compat_ulong_t __user *inp, |
| 1603 | compat_ulong_t __user *outp, compat_ulong_t __user *exp, |
| 1604 | struct compat_timespec __user *tsp, void __user *sig) |
| 1605 | { |
| 1606 | compat_size_t sigsetsize = 0; |
| 1607 | compat_uptr_t up = 0; |
| 1608 | |
| 1609 | if (sig) { |
| 1610 | if (!access_ok(VERIFY_READ, sig, |
| 1611 | sizeof(compat_uptr_t)+sizeof(compat_size_t)) || |
| 1612 | __get_user(up, (compat_uptr_t __user *)sig) || |
| 1613 | __get_user(sigsetsize, |
| 1614 | (compat_size_t __user *)(sig+sizeof(up)))) |
| 1615 | return -EFAULT; |
| 1616 | } |
Heiko Carstens | c9da9f2 | 2009-01-14 14:13:57 +0100 | [diff] [blame] | 1617 | return do_compat_pselect(n, inp, outp, exp, tsp, compat_ptr(up), |
| 1618 | sigsetsize); |
David Woodhouse | 9f72949 | 2006-01-18 17:44:05 -0800 | [diff] [blame] | 1619 | } |
| 1620 | |
| 1621 | asmlinkage long compat_sys_ppoll(struct pollfd __user *ufds, |
| 1622 | unsigned int nfds, struct compat_timespec __user *tsp, |
| 1623 | const compat_sigset_t __user *sigmask, compat_size_t sigsetsize) |
| 1624 | { |
| 1625 | compat_sigset_t ss32; |
| 1626 | sigset_t ksigmask, sigsaved; |
| 1627 | struct compat_timespec ts; |
Arjan van de Ven | 8ff3e8e | 2008-08-31 08:26:40 -0700 | [diff] [blame] | 1628 | struct timespec end_time, *to = NULL; |
David Woodhouse | 9f72949 | 2006-01-18 17:44:05 -0800 | [diff] [blame] | 1629 | int ret; |
| 1630 | |
| 1631 | if (tsp) { |
| 1632 | if (copy_from_user(&ts, tsp, sizeof(ts))) |
| 1633 | return -EFAULT; |
| 1634 | |
Arjan van de Ven | 8ff3e8e | 2008-08-31 08:26:40 -0700 | [diff] [blame] | 1635 | to = &end_time; |
| 1636 | if (poll_select_set_timeout(to, ts.tv_sec, ts.tv_nsec)) |
| 1637 | return -EINVAL; |
David Woodhouse | 9f72949 | 2006-01-18 17:44:05 -0800 | [diff] [blame] | 1638 | } |
| 1639 | |
| 1640 | if (sigmask) { |
Alexey Dobriyan | 3835a9b | 2006-05-15 09:44:27 -0700 | [diff] [blame] | 1641 | if (sigsetsize != sizeof(compat_sigset_t)) |
David Woodhouse | 9f72949 | 2006-01-18 17:44:05 -0800 | [diff] [blame] | 1642 | return -EINVAL; |
| 1643 | if (copy_from_user(&ss32, sigmask, sizeof(ss32))) |
| 1644 | return -EFAULT; |
| 1645 | sigset_from_compat(&ksigmask, &ss32); |
| 1646 | |
| 1647 | sigdelsetmask(&ksigmask, sigmask(SIGKILL)|sigmask(SIGSTOP)); |
| 1648 | sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved); |
| 1649 | } |
| 1650 | |
Arjan van de Ven | 8ff3e8e | 2008-08-31 08:26:40 -0700 | [diff] [blame] | 1651 | ret = do_sys_poll(ufds, nfds, to); |
David Woodhouse | 9f72949 | 2006-01-18 17:44:05 -0800 | [diff] [blame] | 1652 | |
| 1653 | /* We can restart this syscall, usually */ |
| 1654 | if (ret == -EINTR) { |
| 1655 | /* |
| 1656 | * Don't restore the signal mask yet. Let do_signal() deliver |
| 1657 | * the signal on the way back to userspace, before the signal |
| 1658 | * mask is restored. |
| 1659 | */ |
| 1660 | if (sigmask) { |
| 1661 | memcpy(¤t->saved_sigmask, &sigsaved, |
| 1662 | sizeof(sigsaved)); |
Roland McGrath | 4e4c22c | 2008-04-30 00:53:06 -0700 | [diff] [blame] | 1663 | set_restore_sigmask(); |
David Woodhouse | 9f72949 | 2006-01-18 17:44:05 -0800 | [diff] [blame] | 1664 | } |
| 1665 | ret = -ERESTARTNOHAND; |
| 1666 | } else if (sigmask) |
| 1667 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); |
| 1668 | |
Arjan van de Ven | 8ff3e8e | 2008-08-31 08:26:40 -0700 | [diff] [blame] | 1669 | ret = poll_select_copy_remaining(&end_time, tsp, 0, ret); |
David Woodhouse | 9f72949 | 2006-01-18 17:44:05 -0800 | [diff] [blame] | 1670 | |
| 1671 | return ret; |
| 1672 | } |
Roland McGrath | f3de272 | 2008-04-30 00:53:09 -0700 | [diff] [blame] | 1673 | #endif /* HAVE_SET_RESTORE_SIGMASK */ |
David Woodhouse | 9f72949 | 2006-01-18 17:44:05 -0800 | [diff] [blame] | 1674 | |
Davide Libenzi | f6dfb4f | 2007-03-07 20:41:21 -0800 | [diff] [blame] | 1675 | #ifdef CONFIG_EPOLL |
| 1676 | |
Roland McGrath | f3de272 | 2008-04-30 00:53:09 -0700 | [diff] [blame] | 1677 | #ifdef HAVE_SET_RESTORE_SIGMASK |
Davide Libenzi | f6dfb4f | 2007-03-07 20:41:21 -0800 | [diff] [blame] | 1678 | asmlinkage long compat_sys_epoll_pwait(int epfd, |
| 1679 | struct compat_epoll_event __user *events, |
| 1680 | int maxevents, int timeout, |
| 1681 | const compat_sigset_t __user *sigmask, |
| 1682 | compat_size_t sigsetsize) |
| 1683 | { |
| 1684 | long err; |
| 1685 | compat_sigset_t csigmask; |
| 1686 | sigset_t ksigmask, sigsaved; |
| 1687 | |
| 1688 | /* |
| 1689 | * If the caller wants a certain signal mask to be set during the wait, |
| 1690 | * we apply it here. |
| 1691 | */ |
| 1692 | if (sigmask) { |
| 1693 | if (sigsetsize != sizeof(compat_sigset_t)) |
| 1694 | return -EINVAL; |
| 1695 | if (copy_from_user(&csigmask, sigmask, sizeof(csigmask))) |
| 1696 | return -EFAULT; |
| 1697 | sigset_from_compat(&ksigmask, &csigmask); |
| 1698 | sigdelsetmask(&ksigmask, sigmask(SIGKILL) | sigmask(SIGSTOP)); |
| 1699 | sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved); |
| 1700 | } |
| 1701 | |
Davide Libenzi | f6dfb4f | 2007-03-07 20:41:21 -0800 | [diff] [blame] | 1702 | err = sys_epoll_wait(epfd, events, maxevents, timeout); |
Davide Libenzi | f6dfb4f | 2007-03-07 20:41:21 -0800 | [diff] [blame] | 1703 | |
| 1704 | /* |
| 1705 | * If we changed the signal mask, we need to restore the original one. |
| 1706 | * In case we've got a signal while waiting, we do not restore the |
| 1707 | * signal mask yet, and we allow do_signal() to deliver the signal on |
| 1708 | * the way back to userspace, before the signal mask is restored. |
| 1709 | */ |
| 1710 | if (sigmask) { |
| 1711 | if (err == -EINTR) { |
| 1712 | memcpy(¤t->saved_sigmask, &sigsaved, |
| 1713 | sizeof(sigsaved)); |
Roland McGrath | 4e4c22c | 2008-04-30 00:53:06 -0700 | [diff] [blame] | 1714 | set_restore_sigmask(); |
Davide Libenzi | f6dfb4f | 2007-03-07 20:41:21 -0800 | [diff] [blame] | 1715 | } else |
| 1716 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); |
| 1717 | } |
| 1718 | |
| 1719 | return err; |
| 1720 | } |
Roland McGrath | f3de272 | 2008-04-30 00:53:09 -0700 | [diff] [blame] | 1721 | #endif /* HAVE_SET_RESTORE_SIGMASK */ |
Davide Libenzi | f6dfb4f | 2007-03-07 20:41:21 -0800 | [diff] [blame] | 1722 | |
| 1723 | #endif /* CONFIG_EPOLL */ |
Davide Libenzi | 6d18c92 | 2007-05-10 22:23:15 -0700 | [diff] [blame] | 1724 | |
| 1725 | #ifdef CONFIG_SIGNALFD |
| 1726 | |
Ulrich Drepper | 9deb27b | 2008-07-23 21:29:24 -0700 | [diff] [blame] | 1727 | asmlinkage long compat_sys_signalfd4(int ufd, |
| 1728 | const compat_sigset_t __user *sigmask, |
| 1729 | compat_size_t sigsetsize, int flags) |
Davide Libenzi | 6d18c92 | 2007-05-10 22:23:15 -0700 | [diff] [blame] | 1730 | { |
| 1731 | compat_sigset_t ss32; |
| 1732 | sigset_t tmp; |
| 1733 | sigset_t __user *ksigmask; |
| 1734 | |
| 1735 | if (sigsetsize != sizeof(compat_sigset_t)) |
| 1736 | return -EINVAL; |
| 1737 | if (copy_from_user(&ss32, sigmask, sizeof(ss32))) |
| 1738 | return -EFAULT; |
| 1739 | sigset_from_compat(&tmp, &ss32); |
| 1740 | ksigmask = compat_alloc_user_space(sizeof(sigset_t)); |
| 1741 | if (copy_to_user(ksigmask, &tmp, sizeof(sigset_t))) |
| 1742 | return -EFAULT; |
| 1743 | |
Ulrich Drepper | 9deb27b | 2008-07-23 21:29:24 -0700 | [diff] [blame] | 1744 | return sys_signalfd4(ufd, ksigmask, sizeof(sigset_t), flags); |
Davide Libenzi | 6d18c92 | 2007-05-10 22:23:15 -0700 | [diff] [blame] | 1745 | } |
| 1746 | |
Ulrich Drepper | 9deb27b | 2008-07-23 21:29:24 -0700 | [diff] [blame] | 1747 | asmlinkage long compat_sys_signalfd(int ufd, |
| 1748 | const compat_sigset_t __user *sigmask, |
| 1749 | compat_size_t sigsetsize) |
| 1750 | { |
| 1751 | return compat_sys_signalfd4(ufd, sigmask, sigsetsize, 0); |
| 1752 | } |
Davide Libenzi | 6d18c92 | 2007-05-10 22:23:15 -0700 | [diff] [blame] | 1753 | #endif /* CONFIG_SIGNALFD */ |
| 1754 | |
Davide Libenzi | 83f5d12 | 2007-05-10 22:23:18 -0700 | [diff] [blame] | 1755 | #ifdef CONFIG_TIMERFD |
| 1756 | |
Davide Libenzi | 4d672e7 | 2008-02-04 22:27:26 -0800 | [diff] [blame] | 1757 | asmlinkage long compat_sys_timerfd_settime(int ufd, int flags, |
| 1758 | const struct compat_itimerspec __user *utmr, |
| 1759 | struct compat_itimerspec __user *otmr) |
Davide Libenzi | 83f5d12 | 2007-05-10 22:23:18 -0700 | [diff] [blame] | 1760 | { |
Davide Libenzi | 4d672e7 | 2008-02-04 22:27:26 -0800 | [diff] [blame] | 1761 | int error; |
Davide Libenzi | 83f5d12 | 2007-05-10 22:23:18 -0700 | [diff] [blame] | 1762 | struct itimerspec t; |
| 1763 | struct itimerspec __user *ut; |
| 1764 | |
Davide Libenzi | 83f5d12 | 2007-05-10 22:23:18 -0700 | [diff] [blame] | 1765 | if (get_compat_itimerspec(&t, utmr)) |
Heiko Carstens | 8317f14 | 2007-05-16 22:11:08 -0700 | [diff] [blame] | 1766 | return -EFAULT; |
Davide Libenzi | 4d672e7 | 2008-02-04 22:27:26 -0800 | [diff] [blame] | 1767 | ut = compat_alloc_user_space(2 * sizeof(struct itimerspec)); |
| 1768 | if (copy_to_user(&ut[0], &t, sizeof(t))) |
Heiko Carstens | 8317f14 | 2007-05-16 22:11:08 -0700 | [diff] [blame] | 1769 | return -EFAULT; |
Davide Libenzi | 4d672e7 | 2008-02-04 22:27:26 -0800 | [diff] [blame] | 1770 | error = sys_timerfd_settime(ufd, flags, &ut[0], &ut[1]); |
| 1771 | if (!error && otmr) |
| 1772 | error = (copy_from_user(&t, &ut[1], sizeof(struct itimerspec)) || |
| 1773 | put_compat_itimerspec(otmr, &t)) ? -EFAULT: 0; |
Davide Libenzi | 83f5d12 | 2007-05-10 22:23:18 -0700 | [diff] [blame] | 1774 | |
Davide Libenzi | 4d672e7 | 2008-02-04 22:27:26 -0800 | [diff] [blame] | 1775 | return error; |
| 1776 | } |
| 1777 | |
| 1778 | asmlinkage long compat_sys_timerfd_gettime(int ufd, |
| 1779 | struct compat_itimerspec __user *otmr) |
| 1780 | { |
| 1781 | int error; |
| 1782 | struct itimerspec t; |
| 1783 | struct itimerspec __user *ut; |
| 1784 | |
| 1785 | ut = compat_alloc_user_space(sizeof(struct itimerspec)); |
| 1786 | error = sys_timerfd_gettime(ufd, ut); |
| 1787 | if (!error) |
| 1788 | error = (copy_from_user(&t, ut, sizeof(struct itimerspec)) || |
| 1789 | put_compat_itimerspec(otmr, &t)) ? -EFAULT: 0; |
| 1790 | |
| 1791 | return error; |
Davide Libenzi | 83f5d12 | 2007-05-10 22:23:18 -0700 | [diff] [blame] | 1792 | } |
| 1793 | |
| 1794 | #endif /* CONFIG_TIMERFD */ |
Aneesh Kumar K.V | becfd1f | 2011-01-29 18:43:26 +0530 | [diff] [blame] | 1795 | |
| 1796 | #ifdef CONFIG_FHANDLE |
| 1797 | /* |
| 1798 | * Exactly like fs/open.c:sys_open_by_handle_at(), except that it |
| 1799 | * doesn't set the O_LARGEFILE flag. |
| 1800 | */ |
| 1801 | asmlinkage long |
| 1802 | compat_sys_open_by_handle_at(int mountdirfd, |
| 1803 | struct file_handle __user *handle, int flags) |
| 1804 | { |
| 1805 | return do_handle_open(mountdirfd, handle, flags); |
| 1806 | } |
| 1807 | #endif |