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> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | #include <linux/dirent.h> |
Robert Love | 0eeca28 | 2005-07-12 17:06:03 -0400 | [diff] [blame] | 37 | #include <linux/fsnotify.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | #include <linux/highuid.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | #include <linux/personality.h> |
| 40 | #include <linux/rwsem.h> |
Jay Lan | 8f0ab51 | 2006-09-30 23:28:59 -0700 | [diff] [blame] | 41 | #include <linux/tsacct_kern.h> |
Christoph Hellwig | 6272e26 | 2007-05-08 00:29:21 -0700 | [diff] [blame] | 42 | #include <linux/security.h> |
Al Viro | a1f8e7f7 | 2006-10-19 16:08:53 -0400 | [diff] [blame] | 43 | #include <linux/highmem.h> |
Davide Libenzi | 6d18c92 | 2007-05-10 22:23:15 -0700 | [diff] [blame] | 44 | #include <linux/signal.h> |
Al Viro | bd01f84 | 2006-10-19 17:23:57 -0400 | [diff] [blame] | 45 | #include <linux/poll.h> |
David S. Miller | 4a805e8 | 2005-09-14 21:40:00 -0700 | [diff] [blame] | 46 | #include <linux/mm.h> |
Davide Libenzi | f6dfb4f | 2007-03-07 20:41:21 -0800 | [diff] [blame] | 47 | #include <linux/eventpoll.h> |
Al Viro | 498052b | 2009-03-30 07:20:30 -0400 | [diff] [blame] | 48 | #include <linux/fs_struct.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 49 | #include <linux/slab.h> |
wu zhangjin | 504b701 | 2010-10-30 08:19:35 -0700 | [diff] [blame] | 50 | #include <linux/pagemap.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | #include <asm/uaccess.h> |
| 53 | #include <asm/mmu_context.h> |
| 54 | #include <asm/ioctls.h> |
David Howells | 07f3f05 | 2006-09-30 20:52:18 +0200 | [diff] [blame] | 55 | #include "internal.h" |
David Woodhouse | 9f72949 | 2006-01-18 17:44:05 -0800 | [diff] [blame] | 56 | |
Andi Kleen | bebfa10 | 2006-06-26 13:56:52 +0200 | [diff] [blame] | 57 | int compat_log = 1; |
| 58 | |
| 59 | int compat_printk(const char *fmt, ...) |
| 60 | { |
| 61 | va_list ap; |
| 62 | int ret; |
| 63 | if (!compat_log) |
| 64 | return 0; |
| 65 | va_start(ap, fmt); |
| 66 | ret = vprintk(fmt, ap); |
| 67 | va_end(ap); |
| 68 | return ret; |
| 69 | } |
| 70 | |
Badari Pulavarty | ee0b3e6 | 2006-09-30 23:28:47 -0700 | [diff] [blame] | 71 | #include "read_write.h" |
| 72 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | /* |
| 74 | * Not all architectures have sys_utime, so implement this in terms |
| 75 | * of sys_utimes. |
| 76 | */ |
David Howells | c788732 | 2010-08-11 11:26:22 +0100 | [diff] [blame] | 77 | asmlinkage long compat_sys_utime(const char __user *filename, |
| 78 | struct compat_utimbuf __user *t) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | { |
Ulrich Drepper | 1c710c8 | 2007-05-08 00:33:25 -0700 | [diff] [blame] | 80 | struct timespec tv[2]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | |
| 82 | if (t) { |
| 83 | if (get_user(tv[0].tv_sec, &t->actime) || |
| 84 | get_user(tv[1].tv_sec, &t->modtime)) |
| 85 | return -EFAULT; |
Ulrich Drepper | 1c710c8 | 2007-05-08 00:33:25 -0700 | [diff] [blame] | 86 | tv[0].tv_nsec = 0; |
| 87 | tv[1].tv_nsec = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | } |
Ulrich Drepper | 1c710c8 | 2007-05-08 00:33:25 -0700 | [diff] [blame] | 89 | return do_utimes(AT_FDCWD, filename, t ? tv : NULL, 0); |
| 90 | } |
| 91 | |
David Howells | c788732 | 2010-08-11 11:26:22 +0100 | [diff] [blame] | 92 | 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] | 93 | { |
| 94 | struct timespec tv[2]; |
| 95 | |
| 96 | if (t) { |
| 97 | if (get_compat_timespec(&tv[0], &t[0]) || |
| 98 | get_compat_timespec(&tv[1], &t[1])) |
| 99 | return -EFAULT; |
| 100 | |
Ulrich Drepper | 1c710c8 | 2007-05-08 00:33:25 -0700 | [diff] [blame] | 101 | if (tv[0].tv_nsec == UTIME_OMIT && tv[1].tv_nsec == UTIME_OMIT) |
| 102 | return 0; |
| 103 | } |
| 104 | return do_utimes(dfd, filename, t ? tv : NULL, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | } |
| 106 | |
David Howells | c788732 | 2010-08-11 11:26:22 +0100 | [diff] [blame] | 107 | 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] | 108 | { |
Ulrich Drepper | 1c710c8 | 2007-05-08 00:33:25 -0700 | [diff] [blame] | 109 | struct timespec tv[2]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | |
Stephen Rothwell | 9ad11ab | 2006-02-02 16:11:51 +1100 | [diff] [blame] | 111 | if (t) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | if (get_user(tv[0].tv_sec, &t[0].tv_sec) || |
Ulrich Drepper | 1c710c8 | 2007-05-08 00:33:25 -0700 | [diff] [blame] | 113 | get_user(tv[0].tv_nsec, &t[0].tv_usec) || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | get_user(tv[1].tv_sec, &t[1].tv_sec) || |
Ulrich Drepper | 1c710c8 | 2007-05-08 00:33:25 -0700 | [diff] [blame] | 115 | get_user(tv[1].tv_nsec, &t[1].tv_usec)) |
Stephen Rothwell | 9ad11ab | 2006-02-02 16:11:51 +1100 | [diff] [blame] | 116 | return -EFAULT; |
Ulrich Drepper | 1c710c8 | 2007-05-08 00:33:25 -0700 | [diff] [blame] | 117 | if (tv[0].tv_nsec >= 1000000 || tv[0].tv_nsec < 0 || |
| 118 | tv[1].tv_nsec >= 1000000 || tv[1].tv_nsec < 0) |
| 119 | return -EINVAL; |
| 120 | tv[0].tv_nsec *= 1000; |
| 121 | tv[1].tv_nsec *= 1000; |
Stephen Rothwell | 9ad11ab | 2006-02-02 16:11:51 +1100 | [diff] [blame] | 122 | } |
Ulrich Drepper | 1c710c8 | 2007-05-08 00:33:25 -0700 | [diff] [blame] | 123 | return do_utimes(dfd, filename, t ? tv : NULL, 0); |
Ulrich Drepper | 5590ff0 | 2006-01-18 17:43:53 -0800 | [diff] [blame] | 124 | } |
| 125 | |
David Howells | c788732 | 2010-08-11 11:26:22 +0100 | [diff] [blame] | 126 | 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] | 127 | { |
| 128 | return compat_sys_futimesat(AT_FDCWD, filename, t); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | } |
| 130 | |
Christoph Hellwig | f7a5000 | 2008-10-15 22:02:05 -0700 | [diff] [blame] | 131 | static int cp_compat_stat(struct kstat *stat, struct compat_stat __user *ubuf) |
| 132 | { |
Al Viro | fcf8306 | 2012-02-12 20:56:29 -0500 | [diff] [blame] | 133 | struct compat_stat tmp; |
Christoph Hellwig | f7a5000 | 2008-10-15 22:02:05 -0700 | [diff] [blame] | 134 | |
Al Viro | fcf8306 | 2012-02-12 20:56:29 -0500 | [diff] [blame] | 135 | if (!old_valid_dev(stat->dev) || !old_valid_dev(stat->rdev)) |
Christoph Hellwig | f7a5000 | 2008-10-15 22:02:05 -0700 | [diff] [blame] | 136 | return -EOVERFLOW; |
| 137 | |
Al Viro | fcf8306 | 2012-02-12 20:56:29 -0500 | [diff] [blame] | 138 | memset(&tmp, 0, sizeof(tmp)); |
| 139 | tmp.st_dev = old_encode_dev(stat->dev); |
| 140 | tmp.st_ino = stat->ino; |
| 141 | if (sizeof(tmp.st_ino) < sizeof(stat->ino) && tmp.st_ino != stat->ino) |
| 142 | return -EOVERFLOW; |
| 143 | tmp.st_mode = stat->mode; |
| 144 | tmp.st_nlink = stat->nlink; |
| 145 | if (tmp.st_nlink != stat->nlink) |
| 146 | return -EOVERFLOW; |
Eric W. Biederman | a7c1938 | 2012-02-09 09:10:30 -0800 | [diff] [blame] | 147 | SET_UID(tmp.st_uid, from_kuid_munged(current_user_ns(), stat->uid)); |
| 148 | SET_GID(tmp.st_gid, from_kgid_munged(current_user_ns(), stat->gid)); |
Al Viro | fcf8306 | 2012-02-12 20:56:29 -0500 | [diff] [blame] | 149 | tmp.st_rdev = old_encode_dev(stat->rdev); |
| 150 | if ((u64) stat->size > MAX_NON_LFS) |
| 151 | return -EOVERFLOW; |
| 152 | tmp.st_size = stat->size; |
| 153 | tmp.st_atime = stat->atime.tv_sec; |
| 154 | tmp.st_atime_nsec = stat->atime.tv_nsec; |
| 155 | tmp.st_mtime = stat->mtime.tv_sec; |
| 156 | tmp.st_mtime_nsec = stat->mtime.tv_nsec; |
| 157 | tmp.st_ctime = stat->ctime.tv_sec; |
| 158 | tmp.st_ctime_nsec = stat->ctime.tv_nsec; |
| 159 | tmp.st_blocks = stat->blocks; |
| 160 | tmp.st_blksize = stat->blksize; |
| 161 | return copy_to_user(ubuf, &tmp, sizeof(tmp)) ? -EFAULT : 0; |
Christoph Hellwig | f7a5000 | 2008-10-15 22:02:05 -0700 | [diff] [blame] | 162 | } |
| 163 | |
David Howells | c788732 | 2010-08-11 11:26:22 +0100 | [diff] [blame] | 164 | asmlinkage long compat_sys_newstat(const char __user * filename, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 165 | struct compat_stat __user *statbuf) |
| 166 | { |
| 167 | struct kstat stat; |
Christoph Hellwig | 2eae7a1 | 2009-04-08 16:34:03 -0400 | [diff] [blame] | 168 | int error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | |
Christoph Hellwig | 2eae7a1 | 2009-04-08 16:34:03 -0400 | [diff] [blame] | 170 | error = vfs_stat(filename, &stat); |
| 171 | if (error) |
| 172 | return error; |
| 173 | return cp_compat_stat(&stat, statbuf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 174 | } |
| 175 | |
David Howells | c788732 | 2010-08-11 11:26:22 +0100 | [diff] [blame] | 176 | asmlinkage long compat_sys_newlstat(const char __user * filename, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 177 | struct compat_stat __user *statbuf) |
| 178 | { |
| 179 | struct kstat stat; |
Christoph Hellwig | 2eae7a1 | 2009-04-08 16:34:03 -0400 | [diff] [blame] | 180 | int error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 181 | |
Christoph Hellwig | 2eae7a1 | 2009-04-08 16:34:03 -0400 | [diff] [blame] | 182 | error = vfs_lstat(filename, &stat); |
| 183 | if (error) |
| 184 | return error; |
| 185 | return cp_compat_stat(&stat, statbuf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | } |
| 187 | |
Kyle McMartin | 82d821d | 2006-03-24 03:18:20 -0800 | [diff] [blame] | 188 | #ifndef __ARCH_WANT_STAT64 |
David Howells | c788732 | 2010-08-11 11:26:22 +0100 | [diff] [blame] | 189 | asmlinkage long compat_sys_newfstatat(unsigned int dfd, |
| 190 | const char __user *filename, |
Ulrich Drepper | 5590ff0 | 2006-01-18 17:43:53 -0800 | [diff] [blame] | 191 | struct compat_stat __user *statbuf, int flag) |
| 192 | { |
| 193 | struct kstat stat; |
Oleg Drokin | 0112fc2 | 2009-04-08 20:05:42 +0400 | [diff] [blame] | 194 | int error; |
Ulrich Drepper | 5590ff0 | 2006-01-18 17:43:53 -0800 | [diff] [blame] | 195 | |
Oleg Drokin | 0112fc2 | 2009-04-08 20:05:42 +0400 | [diff] [blame] | 196 | error = vfs_fstatat(dfd, filename, &stat, flag); |
| 197 | if (error) |
| 198 | return error; |
| 199 | return cp_compat_stat(&stat, statbuf); |
Ulrich Drepper | 5590ff0 | 2006-01-18 17:43:53 -0800 | [diff] [blame] | 200 | } |
Kyle McMartin | 82d821d | 2006-03-24 03:18:20 -0800 | [diff] [blame] | 201 | #endif |
Ulrich Drepper | 5590ff0 | 2006-01-18 17:43:53 -0800 | [diff] [blame] | 202 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 203 | asmlinkage long compat_sys_newfstat(unsigned int fd, |
| 204 | struct compat_stat __user * statbuf) |
| 205 | { |
| 206 | struct kstat stat; |
| 207 | int error = vfs_fstat(fd, &stat); |
| 208 | |
| 209 | if (!error) |
| 210 | error = cp_compat_stat(&stat, statbuf); |
| 211 | return error; |
| 212 | } |
| 213 | |
| 214 | static int put_compat_statfs(struct compat_statfs __user *ubuf, struct kstatfs *kbuf) |
| 215 | { |
| 216 | |
| 217 | if (sizeof ubuf->f_blocks == 4) { |
Jon Tollefson | f4a67cc | 2008-07-23 21:27:55 -0700 | [diff] [blame] | 218 | if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail | |
| 219 | kbuf->f_bsize | kbuf->f_frsize) & 0xffffffff00000000ULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 220 | return -EOVERFLOW; |
| 221 | /* f_files and f_ffree may be -1; it's okay |
| 222 | * to stuff that into 32 bits */ |
| 223 | if (kbuf->f_files != 0xffffffffffffffffULL |
| 224 | && (kbuf->f_files & 0xffffffff00000000ULL)) |
| 225 | return -EOVERFLOW; |
| 226 | if (kbuf->f_ffree != 0xffffffffffffffffULL |
| 227 | && (kbuf->f_ffree & 0xffffffff00000000ULL)) |
| 228 | return -EOVERFLOW; |
| 229 | } |
| 230 | if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) || |
| 231 | __put_user(kbuf->f_type, &ubuf->f_type) || |
| 232 | __put_user(kbuf->f_bsize, &ubuf->f_bsize) || |
| 233 | __put_user(kbuf->f_blocks, &ubuf->f_blocks) || |
| 234 | __put_user(kbuf->f_bfree, &ubuf->f_bfree) || |
| 235 | __put_user(kbuf->f_bavail, &ubuf->f_bavail) || |
| 236 | __put_user(kbuf->f_files, &ubuf->f_files) || |
| 237 | __put_user(kbuf->f_ffree, &ubuf->f_ffree) || |
| 238 | __put_user(kbuf->f_namelen, &ubuf->f_namelen) || |
| 239 | __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) || |
| 240 | __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) || |
| 241 | __put_user(kbuf->f_frsize, &ubuf->f_frsize) || |
Eric W. Biederman | 1448c72 | 2011-10-17 13:40:02 -0700 | [diff] [blame] | 242 | __put_user(kbuf->f_flags, &ubuf->f_flags) || |
| 243 | __clear_user(ubuf->f_spare, sizeof(ubuf->f_spare))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | return -EFAULT; |
| 245 | return 0; |
| 246 | } |
| 247 | |
| 248 | /* |
Namhyung Kim | 974d879 | 2010-12-27 01:41:53 +0900 | [diff] [blame] | 249 | * 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] | 250 | * should be checked against those from time to time |
| 251 | */ |
Al Viro | 2d8f303 | 2008-07-22 09:59:21 -0400 | [diff] [blame] | 252 | 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] | 253 | { |
Al Viro | c8b91ac | 2011-03-12 10:41:39 -0500 | [diff] [blame] | 254 | struct kstatfs tmp; |
| 255 | int error = user_statfs(pathname, &tmp); |
| 256 | if (!error) |
| 257 | error = put_compat_statfs(buf, &tmp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 258 | return error; |
| 259 | } |
| 260 | |
| 261 | asmlinkage long compat_sys_fstatfs(unsigned int fd, struct compat_statfs __user *buf) |
| 262 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 263 | struct kstatfs tmp; |
Al Viro | c8b91ac | 2011-03-12 10:41:39 -0500 | [diff] [blame] | 264 | int error = fd_statfs(fd, &tmp); |
David Gibson | 86e07ce | 2005-11-21 21:32:23 -0800 | [diff] [blame] | 265 | if (!error) |
| 266 | error = put_compat_statfs(buf, &tmp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 267 | return error; |
| 268 | } |
| 269 | |
| 270 | static int put_compat_statfs64(struct compat_statfs64 __user *ubuf, struct kstatfs *kbuf) |
| 271 | { |
| 272 | if (sizeof ubuf->f_blocks == 4) { |
Jon Tollefson | f4a67cc | 2008-07-23 21:27:55 -0700 | [diff] [blame] | 273 | if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail | |
| 274 | kbuf->f_bsize | kbuf->f_frsize) & 0xffffffff00000000ULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 275 | return -EOVERFLOW; |
| 276 | /* f_files and f_ffree may be -1; it's okay |
| 277 | * to stuff that into 32 bits */ |
| 278 | if (kbuf->f_files != 0xffffffffffffffffULL |
| 279 | && (kbuf->f_files & 0xffffffff00000000ULL)) |
| 280 | return -EOVERFLOW; |
| 281 | if (kbuf->f_ffree != 0xffffffffffffffffULL |
| 282 | && (kbuf->f_ffree & 0xffffffff00000000ULL)) |
| 283 | return -EOVERFLOW; |
| 284 | } |
| 285 | if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) || |
| 286 | __put_user(kbuf->f_type, &ubuf->f_type) || |
| 287 | __put_user(kbuf->f_bsize, &ubuf->f_bsize) || |
| 288 | __put_user(kbuf->f_blocks, &ubuf->f_blocks) || |
| 289 | __put_user(kbuf->f_bfree, &ubuf->f_bfree) || |
| 290 | __put_user(kbuf->f_bavail, &ubuf->f_bavail) || |
| 291 | __put_user(kbuf->f_files, &ubuf->f_files) || |
| 292 | __put_user(kbuf->f_ffree, &ubuf->f_ffree) || |
| 293 | __put_user(kbuf->f_namelen, &ubuf->f_namelen) || |
| 294 | __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) || |
| 295 | __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) || |
Namhyung Kim | e0bb6bd | 2010-12-27 01:41:54 +0900 | [diff] [blame] | 296 | __put_user(kbuf->f_frsize, &ubuf->f_frsize) || |
| 297 | __put_user(kbuf->f_flags, &ubuf->f_flags) || |
| 298 | __clear_user(ubuf->f_spare, sizeof(ubuf->f_spare))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 299 | return -EFAULT; |
| 300 | return 0; |
| 301 | } |
| 302 | |
Al Viro | 2d8f303 | 2008-07-22 09:59:21 -0400 | [diff] [blame] | 303 | 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] | 304 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 305 | struct kstatfs tmp; |
| 306 | int error; |
| 307 | |
| 308 | if (sz != sizeof(*buf)) |
| 309 | return -EINVAL; |
| 310 | |
Al Viro | c8b91ac | 2011-03-12 10:41:39 -0500 | [diff] [blame] | 311 | error = user_statfs(pathname, &tmp); |
David Gibson | 86e07ce | 2005-11-21 21:32:23 -0800 | [diff] [blame] | 312 | if (!error) |
| 313 | error = put_compat_statfs64(buf, &tmp); |
Al Viro | c8b91ac | 2011-03-12 10:41:39 -0500 | [diff] [blame] | 314 | return error; |
| 315 | } |
| 316 | |
| 317 | asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz, struct compat_statfs64 __user *buf) |
| 318 | { |
| 319 | struct kstatfs tmp; |
| 320 | int error; |
| 321 | |
| 322 | if (sz != sizeof(*buf)) |
| 323 | return -EINVAL; |
| 324 | |
| 325 | error = fd_statfs(fd, &tmp); |
| 326 | if (!error) |
| 327 | error = put_compat_statfs64(buf, &tmp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 328 | return error; |
| 329 | } |
| 330 | |
Christoph Hellwig | 2b1c6bd | 2008-11-28 10:09:09 +0100 | [diff] [blame] | 331 | /* |
| 332 | * This is a copy of sys_ustat, just dealing with a structure layout. |
| 333 | * Given how simple this syscall is that apporach is more maintainable |
| 334 | * than the various conversion hacks. |
| 335 | */ |
| 336 | asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u) |
| 337 | { |
Christoph Hellwig | 2b1c6bd | 2008-11-28 10:09:09 +0100 | [diff] [blame] | 338 | struct compat_ustat tmp; |
| 339 | struct kstatfs sbuf; |
Al Viro | cf31e70 | 2012-01-02 22:28:36 -0500 | [diff] [blame] | 340 | int err = vfs_ustat(new_decode_dev(dev), &sbuf); |
Christoph Hellwig | 2b1c6bd | 2008-11-28 10:09:09 +0100 | [diff] [blame] | 341 | if (err) |
| 342 | return err; |
| 343 | |
| 344 | memset(&tmp, 0, sizeof(struct compat_ustat)); |
| 345 | tmp.f_tfree = sbuf.f_bfree; |
| 346 | tmp.f_tinode = sbuf.f_ffree; |
| 347 | if (copy_to_user(u, &tmp, sizeof(struct compat_ustat))) |
| 348 | return -EFAULT; |
| 349 | return 0; |
| 350 | } |
| 351 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 352 | static int get_compat_flock(struct flock *kfl, struct compat_flock __user *ufl) |
| 353 | { |
| 354 | if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) || |
| 355 | __get_user(kfl->l_type, &ufl->l_type) || |
| 356 | __get_user(kfl->l_whence, &ufl->l_whence) || |
| 357 | __get_user(kfl->l_start, &ufl->l_start) || |
| 358 | __get_user(kfl->l_len, &ufl->l_len) || |
| 359 | __get_user(kfl->l_pid, &ufl->l_pid)) |
| 360 | return -EFAULT; |
| 361 | return 0; |
| 362 | } |
| 363 | |
| 364 | static int put_compat_flock(struct flock *kfl, struct compat_flock __user *ufl) |
| 365 | { |
| 366 | if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) || |
| 367 | __put_user(kfl->l_type, &ufl->l_type) || |
| 368 | __put_user(kfl->l_whence, &ufl->l_whence) || |
| 369 | __put_user(kfl->l_start, &ufl->l_start) || |
| 370 | __put_user(kfl->l_len, &ufl->l_len) || |
| 371 | __put_user(kfl->l_pid, &ufl->l_pid)) |
| 372 | return -EFAULT; |
| 373 | return 0; |
| 374 | } |
| 375 | |
| 376 | #ifndef HAVE_ARCH_GET_COMPAT_FLOCK64 |
| 377 | static int get_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl) |
| 378 | { |
| 379 | if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) || |
| 380 | __get_user(kfl->l_type, &ufl->l_type) || |
| 381 | __get_user(kfl->l_whence, &ufl->l_whence) || |
| 382 | __get_user(kfl->l_start, &ufl->l_start) || |
| 383 | __get_user(kfl->l_len, &ufl->l_len) || |
| 384 | __get_user(kfl->l_pid, &ufl->l_pid)) |
| 385 | return -EFAULT; |
| 386 | return 0; |
| 387 | } |
| 388 | #endif |
| 389 | |
| 390 | #ifndef HAVE_ARCH_PUT_COMPAT_FLOCK64 |
| 391 | static int put_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl) |
| 392 | { |
| 393 | if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) || |
| 394 | __put_user(kfl->l_type, &ufl->l_type) || |
| 395 | __put_user(kfl->l_whence, &ufl->l_whence) || |
| 396 | __put_user(kfl->l_start, &ufl->l_start) || |
| 397 | __put_user(kfl->l_len, &ufl->l_len) || |
| 398 | __put_user(kfl->l_pid, &ufl->l_pid)) |
| 399 | return -EFAULT; |
| 400 | return 0; |
| 401 | } |
| 402 | #endif |
| 403 | |
| 404 | asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd, |
| 405 | unsigned long arg) |
| 406 | { |
| 407 | mm_segment_t old_fs; |
| 408 | struct flock f; |
| 409 | long ret; |
| 410 | |
| 411 | switch (cmd) { |
| 412 | case F_GETLK: |
| 413 | case F_SETLK: |
| 414 | case F_SETLKW: |
| 415 | ret = get_compat_flock(&f, compat_ptr(arg)); |
| 416 | if (ret != 0) |
| 417 | break; |
| 418 | old_fs = get_fs(); |
| 419 | set_fs(KERNEL_DS); |
| 420 | ret = sys_fcntl(fd, cmd, (unsigned long)&f); |
| 421 | set_fs(old_fs); |
| 422 | if (cmd == F_GETLK && ret == 0) { |
Nikanth Karthikesan | ff677f8 | 2009-04-01 14:40:51 +0530 | [diff] [blame] | 423 | /* GETLK was successful and we need to return the data... |
NeilBrown | 2520f14 | 2006-01-08 01:02:40 -0800 | [diff] [blame] | 424 | * but it needs to fit in the compat structure. |
| 425 | * l_start shouldn't be too big, unless the original |
| 426 | * start + end is greater than COMPAT_OFF_T_MAX, in which |
| 427 | * case the app was asking for trouble, so we return |
| 428 | * -EOVERFLOW in that case. |
| 429 | * l_len could be too big, in which case we just truncate it, |
| 430 | * and only allow the app to see that part of the conflicting |
| 431 | * lock that might make sense to it anyway |
| 432 | */ |
| 433 | |
| 434 | if (f.l_start > COMPAT_OFF_T_MAX) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 435 | ret = -EOVERFLOW; |
NeilBrown | 2520f14 | 2006-01-08 01:02:40 -0800 | [diff] [blame] | 436 | if (f.l_len > COMPAT_OFF_T_MAX) |
| 437 | f.l_len = COMPAT_OFF_T_MAX; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 438 | if (ret == 0) |
| 439 | ret = put_compat_flock(&f, compat_ptr(arg)); |
| 440 | } |
| 441 | break; |
| 442 | |
| 443 | case F_GETLK64: |
| 444 | case F_SETLK64: |
| 445 | case F_SETLKW64: |
| 446 | ret = get_compat_flock64(&f, compat_ptr(arg)); |
| 447 | if (ret != 0) |
| 448 | break; |
| 449 | old_fs = get_fs(); |
| 450 | set_fs(KERNEL_DS); |
| 451 | ret = sys_fcntl(fd, (cmd == F_GETLK64) ? F_GETLK : |
| 452 | ((cmd == F_SETLK64) ? F_SETLK : F_SETLKW), |
| 453 | (unsigned long)&f); |
| 454 | set_fs(old_fs); |
| 455 | if (cmd == F_GETLK64 && ret == 0) { |
NeilBrown | 2520f14 | 2006-01-08 01:02:40 -0800 | [diff] [blame] | 456 | /* need to return lock information - see above for commentary */ |
| 457 | if (f.l_start > COMPAT_LOFF_T_MAX) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 458 | ret = -EOVERFLOW; |
NeilBrown | 2520f14 | 2006-01-08 01:02:40 -0800 | [diff] [blame] | 459 | if (f.l_len > COMPAT_LOFF_T_MAX) |
| 460 | f.l_len = COMPAT_LOFF_T_MAX; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 461 | if (ret == 0) |
| 462 | ret = put_compat_flock64(&f, compat_ptr(arg)); |
| 463 | } |
| 464 | break; |
| 465 | |
| 466 | default: |
| 467 | ret = sys_fcntl(fd, cmd, arg); |
| 468 | break; |
| 469 | } |
| 470 | return ret; |
| 471 | } |
| 472 | |
| 473 | asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd, |
| 474 | unsigned long arg) |
| 475 | { |
| 476 | if ((cmd == F_GETLK64) || (cmd == F_SETLK64) || (cmd == F_SETLKW64)) |
| 477 | return -EINVAL; |
| 478 | return compat_sys_fcntl64(fd, cmd, arg); |
| 479 | } |
| 480 | |
| 481 | asmlinkage long |
| 482 | compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p) |
| 483 | { |
| 484 | long ret; |
| 485 | aio_context_t ctx64; |
| 486 | |
| 487 | mm_segment_t oldfs = get_fs(); |
| 488 | if (unlikely(get_user(ctx64, ctx32p))) |
| 489 | return -EFAULT; |
| 490 | |
| 491 | set_fs(KERNEL_DS); |
| 492 | /* The __user pointer cast is valid because of the set_fs() */ |
| 493 | ret = sys_io_setup(nr_reqs, (aio_context_t __user *) &ctx64); |
| 494 | set_fs(oldfs); |
| 495 | /* truncating is ok because it's a user address */ |
| 496 | if (!ret) |
| 497 | ret = put_user((u32) ctx64, ctx32p); |
| 498 | return ret; |
| 499 | } |
| 500 | |
| 501 | asmlinkage long |
| 502 | compat_sys_io_getevents(aio_context_t ctx_id, |
| 503 | unsigned long min_nr, |
| 504 | unsigned long nr, |
| 505 | struct io_event __user *events, |
| 506 | struct compat_timespec __user *timeout) |
| 507 | { |
| 508 | long ret; |
| 509 | struct timespec t; |
| 510 | struct timespec __user *ut = NULL; |
| 511 | |
| 512 | ret = -EFAULT; |
| 513 | if (unlikely(!access_ok(VERIFY_WRITE, events, |
| 514 | nr * sizeof(struct io_event)))) |
| 515 | goto out; |
| 516 | if (timeout) { |
| 517 | if (get_compat_timespec(&t, timeout)) |
| 518 | goto out; |
| 519 | |
| 520 | ut = compat_alloc_user_space(sizeof(*ut)); |
| 521 | if (copy_to_user(ut, &t, sizeof(t)) ) |
| 522 | goto out; |
| 523 | } |
| 524 | ret = sys_io_getevents(ctx_id, min_nr, nr, events, ut); |
| 525 | out: |
| 526 | return ret; |
| 527 | } |
| 528 | |
Jeff Moyer | b837336 | 2010-05-26 14:44:25 -0700 | [diff] [blame] | 529 | /* A write operation does a read from user space and vice versa */ |
| 530 | #define vrfy_dir(type) ((type) == READ ? VERIFY_WRITE : VERIFY_READ) |
| 531 | |
| 532 | ssize_t compat_rw_copy_check_uvector(int type, |
| 533 | const struct compat_iovec __user *uvector, unsigned long nr_segs, |
| 534 | unsigned long fast_segs, struct iovec *fast_pointer, |
Christopher Yeoh | ac34ebb | 2012-05-31 16:26:42 -0700 | [diff] [blame] | 535 | struct iovec **ret_pointer) |
Jeff Moyer | b837336 | 2010-05-26 14:44:25 -0700 | [diff] [blame] | 536 | { |
| 537 | compat_ssize_t tot_len; |
| 538 | struct iovec *iov = *ret_pointer = fast_pointer; |
| 539 | ssize_t ret = 0; |
| 540 | int seg; |
| 541 | |
| 542 | /* |
| 543 | * SuS says "The readv() function *may* fail if the iovcnt argument |
| 544 | * was less than or equal to 0, or greater than {IOV_MAX}. Linux has |
| 545 | * traditionally returned zero for zero segments, so... |
| 546 | */ |
| 547 | if (nr_segs == 0) |
| 548 | goto out; |
| 549 | |
| 550 | ret = -EINVAL; |
| 551 | if (nr_segs > UIO_MAXIOV || nr_segs < 0) |
| 552 | goto out; |
| 553 | if (nr_segs > fast_segs) { |
| 554 | ret = -ENOMEM; |
| 555 | iov = kmalloc(nr_segs*sizeof(struct iovec), GFP_KERNEL); |
Namhyung Kim | 6a5640f1 | 2010-12-27 01:41:52 +0900 | [diff] [blame] | 556 | if (iov == NULL) |
Jeff Moyer | b837336 | 2010-05-26 14:44:25 -0700 | [diff] [blame] | 557 | goto out; |
Jeff Moyer | b837336 | 2010-05-26 14:44:25 -0700 | [diff] [blame] | 558 | } |
| 559 | *ret_pointer = iov; |
| 560 | |
| 561 | /* |
| 562 | * Single unix specification: |
| 563 | * 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] | 564 | * ssize_t. |
Jeff Moyer | b837336 | 2010-05-26 14:44:25 -0700 | [diff] [blame] | 565 | * |
Linus Torvalds | 435f49a | 2010-10-29 10:36:49 -0700 | [diff] [blame] | 566 | * In Linux, the total length is limited to MAX_RW_COUNT, there is |
| 567 | * no overflow possibility. |
Jeff Moyer | b837336 | 2010-05-26 14:44:25 -0700 | [diff] [blame] | 568 | */ |
| 569 | tot_len = 0; |
| 570 | ret = -EINVAL; |
| 571 | for (seg = 0; seg < nr_segs; seg++) { |
Jeff Moyer | b837336 | 2010-05-26 14:44:25 -0700 | [diff] [blame] | 572 | compat_uptr_t buf; |
| 573 | compat_ssize_t len; |
| 574 | |
| 575 | if (__get_user(len, &uvector->iov_len) || |
| 576 | __get_user(buf, &uvector->iov_base)) { |
| 577 | ret = -EFAULT; |
| 578 | goto out; |
| 579 | } |
| 580 | if (len < 0) /* size_t not fitting in compat_ssize_t .. */ |
| 581 | goto out; |
Christopher Yeoh | ac34ebb | 2012-05-31 16:26:42 -0700 | [diff] [blame] | 582 | if (type >= 0 && |
Christopher Yeoh | fcf6340 | 2011-10-31 17:06:39 -0700 | [diff] [blame] | 583 | !access_ok(vrfy_dir(type), compat_ptr(buf), len)) { |
Jeff Moyer | b837336 | 2010-05-26 14:44:25 -0700 | [diff] [blame] | 584 | ret = -EFAULT; |
| 585 | goto out; |
| 586 | } |
Linus Torvalds | 435f49a | 2010-10-29 10:36:49 -0700 | [diff] [blame] | 587 | if (len > MAX_RW_COUNT - tot_len) |
| 588 | len = MAX_RW_COUNT - tot_len; |
| 589 | tot_len += len; |
Jeff Moyer | b837336 | 2010-05-26 14:44:25 -0700 | [diff] [blame] | 590 | iov->iov_base = compat_ptr(buf); |
| 591 | iov->iov_len = (compat_size_t) len; |
| 592 | uvector++; |
| 593 | iov++; |
| 594 | } |
| 595 | ret = tot_len; |
| 596 | |
| 597 | out: |
| 598 | return ret; |
| 599 | } |
| 600 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 601 | static inline long |
| 602 | copy_iocb(long nr, u32 __user *ptr32, struct iocb __user * __user *ptr64) |
| 603 | { |
| 604 | compat_uptr_t uptr; |
| 605 | int i; |
| 606 | |
| 607 | for (i = 0; i < nr; ++i) { |
| 608 | if (get_user(uptr, ptr32 + i)) |
| 609 | return -EFAULT; |
| 610 | if (put_user(compat_ptr(uptr), ptr64 + i)) |
| 611 | return -EFAULT; |
| 612 | } |
| 613 | return 0; |
| 614 | } |
| 615 | |
| 616 | #define MAX_AIO_SUBMITS (PAGE_SIZE/sizeof(struct iocb *)) |
| 617 | |
| 618 | asmlinkage long |
| 619 | compat_sys_io_submit(aio_context_t ctx_id, int nr, u32 __user *iocb) |
| 620 | { |
| 621 | struct iocb __user * __user *iocb64; |
| 622 | long ret; |
| 623 | |
| 624 | if (unlikely(nr < 0)) |
| 625 | return -EINVAL; |
| 626 | |
| 627 | if (nr > MAX_AIO_SUBMITS) |
| 628 | nr = MAX_AIO_SUBMITS; |
| 629 | |
| 630 | iocb64 = compat_alloc_user_space(nr * sizeof(*iocb64)); |
| 631 | ret = copy_iocb(nr, iocb, iocb64); |
| 632 | if (!ret) |
Jeff Moyer | 9d85cba | 2010-05-26 14:44:26 -0700 | [diff] [blame] | 633 | ret = do_io_submit(ctx_id, nr, iocb64, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 634 | return ret; |
| 635 | } |
| 636 | |
| 637 | struct compat_ncp_mount_data { |
| 638 | compat_int_t version; |
| 639 | compat_uint_t ncp_fd; |
Stephen Rothwell | 202e597 | 2005-09-06 15:16:40 -0700 | [diff] [blame] | 640 | __compat_uid_t mounted_uid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 641 | compat_pid_t wdog_pid; |
| 642 | unsigned char mounted_vol[NCP_VOLNAME_LEN + 1]; |
| 643 | compat_uint_t time_out; |
| 644 | compat_uint_t retry_count; |
| 645 | compat_uint_t flags; |
Stephen Rothwell | 202e597 | 2005-09-06 15:16:40 -0700 | [diff] [blame] | 646 | __compat_uid_t uid; |
| 647 | __compat_gid_t gid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 648 | compat_mode_t file_mode; |
| 649 | compat_mode_t dir_mode; |
| 650 | }; |
| 651 | |
| 652 | struct compat_ncp_mount_data_v4 { |
| 653 | compat_int_t version; |
| 654 | compat_ulong_t flags; |
| 655 | compat_ulong_t mounted_uid; |
| 656 | compat_long_t wdog_pid; |
| 657 | compat_uint_t ncp_fd; |
| 658 | compat_uint_t time_out; |
| 659 | compat_uint_t retry_count; |
| 660 | compat_ulong_t uid; |
| 661 | compat_ulong_t gid; |
| 662 | compat_ulong_t file_mode; |
| 663 | compat_ulong_t dir_mode; |
| 664 | }; |
| 665 | |
| 666 | static void *do_ncp_super_data_conv(void *raw_data) |
| 667 | { |
| 668 | int version = *(unsigned int *)raw_data; |
| 669 | |
| 670 | if (version == 3) { |
| 671 | struct compat_ncp_mount_data *c_n = raw_data; |
| 672 | struct ncp_mount_data *n = raw_data; |
| 673 | |
| 674 | n->dir_mode = c_n->dir_mode; |
| 675 | n->file_mode = c_n->file_mode; |
| 676 | n->gid = c_n->gid; |
| 677 | n->uid = c_n->uid; |
| 678 | memmove (n->mounted_vol, c_n->mounted_vol, (sizeof (c_n->mounted_vol) + 3 * sizeof (unsigned int))); |
| 679 | n->wdog_pid = c_n->wdog_pid; |
| 680 | n->mounted_uid = c_n->mounted_uid; |
| 681 | } else if (version == 4) { |
| 682 | struct compat_ncp_mount_data_v4 *c_n = raw_data; |
| 683 | struct ncp_mount_data_v4 *n = raw_data; |
| 684 | |
| 685 | n->dir_mode = c_n->dir_mode; |
| 686 | n->file_mode = c_n->file_mode; |
| 687 | n->gid = c_n->gid; |
| 688 | n->uid = c_n->uid; |
| 689 | n->retry_count = c_n->retry_count; |
| 690 | n->time_out = c_n->time_out; |
| 691 | n->ncp_fd = c_n->ncp_fd; |
| 692 | n->wdog_pid = c_n->wdog_pid; |
| 693 | n->mounted_uid = c_n->mounted_uid; |
| 694 | n->flags = c_n->flags; |
| 695 | } else if (version != 5) { |
| 696 | return NULL; |
| 697 | } |
| 698 | |
| 699 | return raw_data; |
| 700 | } |
| 701 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 702 | |
David Howells | 9a9947b | 2005-04-18 10:54:51 -0700 | [diff] [blame] | 703 | struct compat_nfs_string { |
| 704 | compat_uint_t len; |
David Howells | 5fc3e62 | 2005-04-27 15:39:03 -0700 | [diff] [blame] | 705 | compat_uptr_t data; |
David Howells | 9a9947b | 2005-04-18 10:54:51 -0700 | [diff] [blame] | 706 | }; |
| 707 | |
| 708 | static inline void compat_nfs_string(struct nfs_string *dst, |
| 709 | struct compat_nfs_string *src) |
| 710 | { |
| 711 | dst->data = compat_ptr(src->data); |
| 712 | dst->len = src->len; |
| 713 | } |
| 714 | |
| 715 | struct compat_nfs4_mount_data_v1 { |
| 716 | compat_int_t version; |
| 717 | compat_int_t flags; |
| 718 | compat_int_t rsize; |
| 719 | compat_int_t wsize; |
| 720 | compat_int_t timeo; |
| 721 | compat_int_t retrans; |
| 722 | compat_int_t acregmin; |
| 723 | compat_int_t acregmax; |
| 724 | compat_int_t acdirmin; |
| 725 | compat_int_t acdirmax; |
| 726 | struct compat_nfs_string client_addr; |
| 727 | struct compat_nfs_string mnt_path; |
| 728 | struct compat_nfs_string hostname; |
| 729 | compat_uint_t host_addrlen; |
David Howells | 5fc3e62 | 2005-04-27 15:39:03 -0700 | [diff] [blame] | 730 | compat_uptr_t host_addr; |
David Howells | 9a9947b | 2005-04-18 10:54:51 -0700 | [diff] [blame] | 731 | compat_int_t proto; |
| 732 | compat_int_t auth_flavourlen; |
David Howells | 5fc3e62 | 2005-04-27 15:39:03 -0700 | [diff] [blame] | 733 | compat_uptr_t auth_flavours; |
David Howells | 9a9947b | 2005-04-18 10:54:51 -0700 | [diff] [blame] | 734 | }; |
| 735 | |
| 736 | static int do_nfs4_super_data_conv(void *raw_data) |
| 737 | { |
| 738 | int version = *(compat_uint_t *) raw_data; |
| 739 | |
| 740 | if (version == 1) { |
| 741 | struct compat_nfs4_mount_data_v1 *raw = raw_data; |
| 742 | struct nfs4_mount_data *real = raw_data; |
| 743 | |
| 744 | /* copy the fields backwards */ |
| 745 | real->auth_flavours = compat_ptr(raw->auth_flavours); |
| 746 | real->auth_flavourlen = raw->auth_flavourlen; |
| 747 | real->proto = raw->proto; |
| 748 | real->host_addr = compat_ptr(raw->host_addr); |
| 749 | real->host_addrlen = raw->host_addrlen; |
| 750 | compat_nfs_string(&real->hostname, &raw->hostname); |
| 751 | compat_nfs_string(&real->mnt_path, &raw->mnt_path); |
| 752 | compat_nfs_string(&real->client_addr, &raw->client_addr); |
| 753 | real->acdirmax = raw->acdirmax; |
| 754 | real->acdirmin = raw->acdirmin; |
| 755 | real->acregmax = raw->acregmax; |
| 756 | real->acregmin = raw->acregmin; |
| 757 | real->retrans = raw->retrans; |
| 758 | real->timeo = raw->timeo; |
| 759 | real->wsize = raw->wsize; |
| 760 | real->rsize = raw->rsize; |
| 761 | real->flags = raw->flags; |
| 762 | real->version = raw->version; |
| 763 | } |
David Howells | 9a9947b | 2005-04-18 10:54:51 -0700 | [diff] [blame] | 764 | |
| 765 | return 0; |
| 766 | } |
| 767 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 768 | #define NCPFS_NAME "ncpfs" |
David Howells | 9a9947b | 2005-04-18 10:54:51 -0700 | [diff] [blame] | 769 | #define NFS4_NAME "nfs4" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 770 | |
David Howells | c788732 | 2010-08-11 11:26:22 +0100 | [diff] [blame] | 771 | asmlinkage long compat_sys_mount(const char __user * dev_name, |
| 772 | const char __user * dir_name, |
| 773 | const char __user * type, unsigned long flags, |
| 774 | const void __user * data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 775 | { |
Vegard Nossum | eca6f53 | 2009-09-18 13:05:45 -0700 | [diff] [blame] | 776 | char *kernel_type; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 777 | unsigned long data_page; |
Vegard Nossum | eca6f53 | 2009-09-18 13:05:45 -0700 | [diff] [blame] | 778 | char *kernel_dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 779 | char *dir_page; |
| 780 | int retval; |
| 781 | |
Vegard Nossum | eca6f53 | 2009-09-18 13:05:45 -0700 | [diff] [blame] | 782 | retval = copy_mount_string(type, &kernel_type); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 783 | if (retval < 0) |
| 784 | goto out; |
| 785 | |
| 786 | dir_page = getname(dir_name); |
| 787 | retval = PTR_ERR(dir_page); |
| 788 | if (IS_ERR(dir_page)) |
| 789 | goto out1; |
| 790 | |
Vegard Nossum | eca6f53 | 2009-09-18 13:05:45 -0700 | [diff] [blame] | 791 | retval = copy_mount_string(dev_name, &kernel_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 792 | if (retval < 0) |
| 793 | goto out2; |
| 794 | |
Vegard Nossum | eca6f53 | 2009-09-18 13:05:45 -0700 | [diff] [blame] | 795 | retval = copy_mount_options(data, &data_page); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 796 | if (retval < 0) |
| 797 | goto out3; |
| 798 | |
| 799 | retval = -EINVAL; |
| 800 | |
Vegard Nossum | eca6f53 | 2009-09-18 13:05:45 -0700 | [diff] [blame] | 801 | if (kernel_type && data_page) { |
Arnd Bergmann | 2116b7a | 2010-10-04 22:55:57 +0200 | [diff] [blame] | 802 | if (!strcmp(kernel_type, NCPFS_NAME)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 803 | do_ncp_super_data_conv((void *)data_page); |
Vegard Nossum | eca6f53 | 2009-09-18 13:05:45 -0700 | [diff] [blame] | 804 | } else if (!strcmp(kernel_type, NFS4_NAME)) { |
David Howells | 9a9947b | 2005-04-18 10:54:51 -0700 | [diff] [blame] | 805 | if (do_nfs4_super_data_conv((void *) data_page)) |
| 806 | goto out4; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 807 | } |
| 808 | } |
| 809 | |
Vegard Nossum | eca6f53 | 2009-09-18 13:05:45 -0700 | [diff] [blame] | 810 | retval = do_mount(kernel_dev, dir_page, kernel_type, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 811 | flags, (void*)data_page); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 812 | |
David Howells | 9a9947b | 2005-04-18 10:54:51 -0700 | [diff] [blame] | 813 | out4: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 814 | free_page(data_page); |
| 815 | out3: |
Vegard Nossum | eca6f53 | 2009-09-18 13:05:45 -0700 | [diff] [blame] | 816 | kfree(kernel_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 817 | out2: |
| 818 | putname(dir_page); |
| 819 | out1: |
Vegard Nossum | eca6f53 | 2009-09-18 13:05:45 -0700 | [diff] [blame] | 820 | kfree(kernel_type); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 821 | out: |
| 822 | return retval; |
| 823 | } |
| 824 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 825 | struct compat_old_linux_dirent { |
| 826 | compat_ulong_t d_ino; |
| 827 | compat_ulong_t d_offset; |
| 828 | unsigned short d_namlen; |
| 829 | char d_name[1]; |
| 830 | }; |
| 831 | |
| 832 | struct compat_readdir_callback { |
| 833 | struct compat_old_linux_dirent __user *dirent; |
| 834 | int result; |
| 835 | }; |
| 836 | |
| 837 | static int compat_fillonedir(void *__buf, const char *name, int namlen, |
David Howells | afefdbb | 2006-10-03 01:13:46 -0700 | [diff] [blame] | 838 | loff_t offset, u64 ino, unsigned int d_type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 839 | { |
| 840 | struct compat_readdir_callback *buf = __buf; |
| 841 | struct compat_old_linux_dirent __user *dirent; |
David Howells | afefdbb | 2006-10-03 01:13:46 -0700 | [diff] [blame] | 842 | compat_ulong_t d_ino; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 843 | |
| 844 | if (buf->result) |
| 845 | return -EINVAL; |
David Howells | afefdbb | 2006-10-03 01:13:46 -0700 | [diff] [blame] | 846 | d_ino = ino; |
Al Viro | 8f3f655 | 2008-08-12 00:28:24 -0400 | [diff] [blame] | 847 | if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) { |
| 848 | buf->result = -EOVERFLOW; |
David Howells | afefdbb | 2006-10-03 01:13:46 -0700 | [diff] [blame] | 849 | return -EOVERFLOW; |
Al Viro | 8f3f655 | 2008-08-12 00:28:24 -0400 | [diff] [blame] | 850 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 851 | buf->result++; |
| 852 | dirent = buf->dirent; |
| 853 | if (!access_ok(VERIFY_WRITE, dirent, |
| 854 | (unsigned long)(dirent->d_name + namlen + 1) - |
| 855 | (unsigned long)dirent)) |
| 856 | goto efault; |
David Howells | afefdbb | 2006-10-03 01:13:46 -0700 | [diff] [blame] | 857 | if ( __put_user(d_ino, &dirent->d_ino) || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 858 | __put_user(offset, &dirent->d_offset) || |
| 859 | __put_user(namlen, &dirent->d_namlen) || |
| 860 | __copy_to_user(dirent->d_name, name, namlen) || |
| 861 | __put_user(0, dirent->d_name + namlen)) |
| 862 | goto efault; |
| 863 | return 0; |
| 864 | efault: |
| 865 | buf->result = -EFAULT; |
| 866 | return -EFAULT; |
| 867 | } |
| 868 | |
| 869 | asmlinkage long compat_sys_old_readdir(unsigned int fd, |
| 870 | struct compat_old_linux_dirent __user *dirent, unsigned int count) |
| 871 | { |
| 872 | int error; |
| 873 | struct file *file; |
Al Viro | 863ced7 | 2012-04-21 18:40:32 -0400 | [diff] [blame] | 874 | int fput_needed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 875 | struct compat_readdir_callback buf; |
| 876 | |
Al Viro | 863ced7 | 2012-04-21 18:40:32 -0400 | [diff] [blame] | 877 | file = fget_light(fd, &fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 878 | if (!file) |
Al Viro | 863ced7 | 2012-04-21 18:40:32 -0400 | [diff] [blame] | 879 | return -EBADF; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 880 | |
| 881 | buf.result = 0; |
| 882 | buf.dirent = dirent; |
| 883 | |
| 884 | error = vfs_readdir(file, compat_fillonedir, &buf); |
Al Viro | 53c9c5c | 2008-08-24 07:29:52 -0400 | [diff] [blame] | 885 | if (buf.result) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 886 | error = buf.result; |
| 887 | |
Al Viro | 863ced7 | 2012-04-21 18:40:32 -0400 | [diff] [blame] | 888 | fput_light(file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 889 | return error; |
| 890 | } |
| 891 | |
| 892 | struct compat_linux_dirent { |
| 893 | compat_ulong_t d_ino; |
| 894 | compat_ulong_t d_off; |
| 895 | unsigned short d_reclen; |
| 896 | char d_name[1]; |
| 897 | }; |
| 898 | |
| 899 | struct compat_getdents_callback { |
| 900 | struct compat_linux_dirent __user *current_dir; |
| 901 | struct compat_linux_dirent __user *previous; |
| 902 | int count; |
| 903 | int error; |
| 904 | }; |
| 905 | |
| 906 | static int compat_filldir(void *__buf, const char *name, int namlen, |
David Howells | afefdbb | 2006-10-03 01:13:46 -0700 | [diff] [blame] | 907 | loff_t offset, u64 ino, unsigned int d_type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 908 | { |
| 909 | struct compat_linux_dirent __user * dirent; |
| 910 | struct compat_getdents_callback *buf = __buf; |
David Howells | afefdbb | 2006-10-03 01:13:46 -0700 | [diff] [blame] | 911 | compat_ulong_t d_ino; |
Kevin Winchester | 85c9fe8 | 2010-08-09 17:20:22 -0700 | [diff] [blame] | 912 | int reclen = ALIGN(offsetof(struct compat_linux_dirent, d_name) + |
| 913 | namlen + 2, sizeof(compat_long_t)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 914 | |
| 915 | buf->error = -EINVAL; /* only used if we fail.. */ |
| 916 | if (reclen > buf->count) |
| 917 | return -EINVAL; |
David Howells | afefdbb | 2006-10-03 01:13:46 -0700 | [diff] [blame] | 918 | d_ino = ino; |
Al Viro | 8f3f655 | 2008-08-12 00:28:24 -0400 | [diff] [blame] | 919 | if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) { |
| 920 | buf->error = -EOVERFLOW; |
David Howells | afefdbb | 2006-10-03 01:13:46 -0700 | [diff] [blame] | 921 | return -EOVERFLOW; |
Al Viro | 8f3f655 | 2008-08-12 00:28:24 -0400 | [diff] [blame] | 922 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 923 | dirent = buf->previous; |
| 924 | if (dirent) { |
| 925 | if (__put_user(offset, &dirent->d_off)) |
| 926 | goto efault; |
| 927 | } |
| 928 | dirent = buf->current_dir; |
David Howells | afefdbb | 2006-10-03 01:13:46 -0700 | [diff] [blame] | 929 | if (__put_user(d_ino, &dirent->d_ino)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 930 | goto efault; |
| 931 | if (__put_user(reclen, &dirent->d_reclen)) |
| 932 | goto efault; |
| 933 | if (copy_to_user(dirent->d_name, name, namlen)) |
| 934 | goto efault; |
| 935 | if (__put_user(0, dirent->d_name + namlen)) |
| 936 | goto efault; |
| 937 | if (__put_user(d_type, (char __user *) dirent + reclen - 1)) |
| 938 | goto efault; |
| 939 | buf->previous = dirent; |
| 940 | dirent = (void __user *)dirent + reclen; |
| 941 | buf->current_dir = dirent; |
| 942 | buf->count -= reclen; |
| 943 | return 0; |
| 944 | efault: |
| 945 | buf->error = -EFAULT; |
| 946 | return -EFAULT; |
| 947 | } |
| 948 | |
| 949 | asmlinkage long compat_sys_getdents(unsigned int fd, |
| 950 | struct compat_linux_dirent __user *dirent, unsigned int count) |
| 951 | { |
| 952 | struct file * file; |
| 953 | struct compat_linux_dirent __user * lastdirent; |
| 954 | struct compat_getdents_callback buf; |
Al Viro | 863ced7 | 2012-04-21 18:40:32 -0400 | [diff] [blame] | 955 | int fput_needed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 956 | int error; |
| 957 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 958 | if (!access_ok(VERIFY_WRITE, dirent, count)) |
Al Viro | 863ced7 | 2012-04-21 18:40:32 -0400 | [diff] [blame] | 959 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 960 | |
Al Viro | 863ced7 | 2012-04-21 18:40:32 -0400 | [diff] [blame] | 961 | file = fget_light(fd, &fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 962 | if (!file) |
Al Viro | 863ced7 | 2012-04-21 18:40:32 -0400 | [diff] [blame] | 963 | return -EBADF; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 964 | |
| 965 | buf.current_dir = dirent; |
| 966 | buf.previous = NULL; |
| 967 | buf.count = count; |
| 968 | buf.error = 0; |
| 969 | |
| 970 | error = vfs_readdir(file, compat_filldir, &buf); |
Al Viro | 53c9c5c | 2008-08-24 07:29:52 -0400 | [diff] [blame] | 971 | if (error >= 0) |
| 972 | error = buf.error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 973 | lastdirent = buf.previous; |
| 974 | if (lastdirent) { |
| 975 | if (put_user(file->f_pos, &lastdirent->d_off)) |
| 976 | error = -EFAULT; |
| 977 | else |
| 978 | error = count - buf.count; |
| 979 | } |
Al Viro | 863ced7 | 2012-04-21 18:40:32 -0400 | [diff] [blame] | 980 | fput_light(file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 981 | return error; |
| 982 | } |
| 983 | |
| 984 | #ifndef __ARCH_OMIT_COMPAT_SYS_GETDENTS64 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 985 | |
| 986 | struct compat_getdents_callback64 { |
| 987 | struct linux_dirent64 __user *current_dir; |
| 988 | struct linux_dirent64 __user *previous; |
| 989 | int count; |
| 990 | int error; |
| 991 | }; |
| 992 | |
| 993 | 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] | 994 | u64 ino, unsigned int d_type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 995 | { |
| 996 | struct linux_dirent64 __user *dirent; |
| 997 | struct compat_getdents_callback64 *buf = __buf; |
Kevin Winchester | 85c9fe8 | 2010-08-09 17:20:22 -0700 | [diff] [blame] | 998 | int reclen = ALIGN(offsetof(struct linux_dirent64, d_name) + namlen + 1, |
| 999 | sizeof(u64)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1000 | u64 off; |
| 1001 | |
| 1002 | buf->error = -EINVAL; /* only used if we fail.. */ |
| 1003 | if (reclen > buf->count) |
| 1004 | return -EINVAL; |
| 1005 | dirent = buf->previous; |
| 1006 | |
| 1007 | if (dirent) { |
| 1008 | if (__put_user_unaligned(offset, &dirent->d_off)) |
| 1009 | goto efault; |
| 1010 | } |
| 1011 | dirent = buf->current_dir; |
| 1012 | if (__put_user_unaligned(ino, &dirent->d_ino)) |
| 1013 | goto efault; |
| 1014 | off = 0; |
| 1015 | if (__put_user_unaligned(off, &dirent->d_off)) |
| 1016 | goto efault; |
| 1017 | if (__put_user(reclen, &dirent->d_reclen)) |
| 1018 | goto efault; |
| 1019 | if (__put_user(d_type, &dirent->d_type)) |
| 1020 | goto efault; |
| 1021 | if (copy_to_user(dirent->d_name, name, namlen)) |
| 1022 | goto efault; |
| 1023 | if (__put_user(0, dirent->d_name + namlen)) |
| 1024 | goto efault; |
| 1025 | buf->previous = dirent; |
| 1026 | dirent = (void __user *)dirent + reclen; |
| 1027 | buf->current_dir = dirent; |
| 1028 | buf->count -= reclen; |
| 1029 | return 0; |
| 1030 | efault: |
| 1031 | buf->error = -EFAULT; |
| 1032 | return -EFAULT; |
| 1033 | } |
| 1034 | |
| 1035 | asmlinkage long compat_sys_getdents64(unsigned int fd, |
| 1036 | struct linux_dirent64 __user * dirent, unsigned int count) |
| 1037 | { |
| 1038 | struct file * file; |
| 1039 | struct linux_dirent64 __user * lastdirent; |
| 1040 | struct compat_getdents_callback64 buf; |
Al Viro | 863ced7 | 2012-04-21 18:40:32 -0400 | [diff] [blame] | 1041 | int fput_needed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1042 | int error; |
| 1043 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1044 | if (!access_ok(VERIFY_WRITE, dirent, count)) |
Al Viro | 863ced7 | 2012-04-21 18:40:32 -0400 | [diff] [blame] | 1045 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1046 | |
Al Viro | 863ced7 | 2012-04-21 18:40:32 -0400 | [diff] [blame] | 1047 | file = fget_light(fd, &fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1048 | if (!file) |
Al Viro | 863ced7 | 2012-04-21 18:40:32 -0400 | [diff] [blame] | 1049 | return -EBADF; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1050 | |
| 1051 | buf.current_dir = dirent; |
| 1052 | buf.previous = NULL; |
| 1053 | buf.count = count; |
| 1054 | buf.error = 0; |
| 1055 | |
| 1056 | error = vfs_readdir(file, compat_filldir64, &buf); |
Al Viro | 53c9c5c | 2008-08-24 07:29:52 -0400 | [diff] [blame] | 1057 | if (error >= 0) |
| 1058 | error = buf.error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1059 | lastdirent = buf.previous; |
| 1060 | if (lastdirent) { |
| 1061 | typeof(lastdirent->d_off) d_off = file->f_pos; |
Heiko Carstens | 7116e99 | 2006-12-06 20:36:36 -0800 | [diff] [blame] | 1062 | if (__put_user_unaligned(d_off, &lastdirent->d_off)) |
Al Viro | 53c9c5c | 2008-08-24 07:29:52 -0400 | [diff] [blame] | 1063 | error = -EFAULT; |
| 1064 | else |
| 1065 | error = count - buf.count; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1066 | } |
Al Viro | 863ced7 | 2012-04-21 18:40:32 -0400 | [diff] [blame] | 1067 | fput_light(file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1068 | return error; |
| 1069 | } |
| 1070 | #endif /* ! __ARCH_OMIT_COMPAT_SYS_GETDENTS64 */ |
| 1071 | |
| 1072 | static ssize_t compat_do_readv_writev(int type, struct file *file, |
| 1073 | const struct compat_iovec __user *uvector, |
| 1074 | unsigned long nr_segs, loff_t *pos) |
| 1075 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1076 | compat_ssize_t tot_len; |
| 1077 | struct iovec iovstack[UIO_FASTIOV]; |
Dan Rosenberg | 767b68e | 2010-09-22 14:32:56 -0400 | [diff] [blame] | 1078 | struct iovec *iov = iovstack; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1079 | ssize_t ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1080 | io_fn_t fn; |
| 1081 | iov_fn_t fnv; |
| 1082 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1083 | ret = -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1084 | if (!file->f_op) |
| 1085 | goto out; |
Jeff Moyer | b837336 | 2010-05-26 14:44:25 -0700 | [diff] [blame] | 1086 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1087 | ret = -EFAULT; |
| 1088 | if (!access_ok(VERIFY_READ, uvector, nr_segs*sizeof(*uvector))) |
| 1089 | goto out; |
| 1090 | |
Jeff Moyer | b837336 | 2010-05-26 14:44:25 -0700 | [diff] [blame] | 1091 | tot_len = compat_rw_copy_check_uvector(type, uvector, nr_segs, |
Christopher Yeoh | ac34ebb | 2012-05-31 16:26:42 -0700 | [diff] [blame] | 1092 | UIO_FASTIOV, iovstack, &iov); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1093 | if (tot_len == 0) { |
| 1094 | ret = 0; |
| 1095 | goto out; |
| 1096 | } |
| 1097 | |
| 1098 | ret = rw_verify_area(type, file, pos, tot_len); |
Linus Torvalds | e28cc71 | 2006-01-04 16:20:40 -0800 | [diff] [blame] | 1099 | if (ret < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1100 | goto out; |
| 1101 | |
| 1102 | fnv = NULL; |
| 1103 | if (type == READ) { |
| 1104 | fn = file->f_op->read; |
Badari Pulavarty | ee0b3e6 | 2006-09-30 23:28:47 -0700 | [diff] [blame] | 1105 | fnv = file->f_op->aio_read; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1106 | } else { |
| 1107 | fn = (io_fn_t)file->f_op->write; |
Badari Pulavarty | ee0b3e6 | 2006-09-30 23:28:47 -0700 | [diff] [blame] | 1108 | fnv = file->f_op->aio_write; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1109 | } |
| 1110 | |
Badari Pulavarty | ee0b3e6 | 2006-09-30 23:28:47 -0700 | [diff] [blame] | 1111 | if (fnv) |
| 1112 | ret = do_sync_readv_writev(file, iov, nr_segs, tot_len, |
| 1113 | pos, fnv); |
| 1114 | else |
| 1115 | ret = do_loop_readv_writev(file, iov, nr_segs, pos, fn); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1116 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1117 | out: |
| 1118 | if (iov != iovstack) |
| 1119 | kfree(iov); |
Robert Love | 0eeca28 | 2005-07-12 17:06:03 -0400 | [diff] [blame] | 1120 | if ((ret + (type == READ)) > 0) { |
Robert Love | 0eeca28 | 2005-07-12 17:06:03 -0400 | [diff] [blame] | 1121 | if (type == READ) |
Eric Paris | 2a12a9d | 2009-12-17 21:24:21 -0500 | [diff] [blame] | 1122 | fsnotify_access(file); |
Robert Love | 0eeca28 | 2005-07-12 17:06:03 -0400 | [diff] [blame] | 1123 | else |
Eric Paris | 2a12a9d | 2009-12-17 21:24:21 -0500 | [diff] [blame] | 1124 | fsnotify_modify(file); |
Robert Love | 0eeca28 | 2005-07-12 17:06:03 -0400 | [diff] [blame] | 1125 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1126 | return ret; |
| 1127 | } |
| 1128 | |
Gerd Hoffmann | dac1213 | 2009-04-02 16:59:20 -0700 | [diff] [blame] | 1129 | static size_t compat_readv(struct file *file, |
| 1130 | const struct compat_iovec __user *vec, |
| 1131 | unsigned long vlen, loff_t *pos) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1132 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1133 | ssize_t ret = -EBADF; |
| 1134 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1135 | if (!(file->f_mode & FMODE_READ)) |
| 1136 | goto out; |
| 1137 | |
| 1138 | ret = -EINVAL; |
Badari Pulavarty | ee0b3e6 | 2006-09-30 23:28:47 -0700 | [diff] [blame] | 1139 | 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] | 1140 | goto out; |
| 1141 | |
Gerd Hoffmann | dac1213 | 2009-04-02 16:59:20 -0700 | [diff] [blame] | 1142 | ret = compat_do_readv_writev(READ, file, vec, vlen, pos); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1143 | |
| 1144 | out: |
Gerd Hoffmann | ca8a5bd | 2009-01-06 14:41:09 -0800 | [diff] [blame] | 1145 | if (ret > 0) |
| 1146 | add_rchar(current, ret); |
| 1147 | inc_syscr(current); |
Gerd Hoffmann | dac1213 | 2009-04-02 16:59:20 -0700 | [diff] [blame] | 1148 | return ret; |
| 1149 | } |
| 1150 | |
| 1151 | asmlinkage ssize_t |
| 1152 | compat_sys_readv(unsigned long fd, const struct compat_iovec __user *vec, |
| 1153 | unsigned long vlen) |
| 1154 | { |
| 1155 | struct file *file; |
Gerd Hoffmann | 10c7db2 | 2009-04-02 16:59:25 -0700 | [diff] [blame] | 1156 | int fput_needed; |
Gerd Hoffmann | dac1213 | 2009-04-02 16:59:20 -0700 | [diff] [blame] | 1157 | ssize_t ret; |
Al Viro | 0e665d5 | 2012-08-20 15:28:00 +0100 | [diff] [blame] | 1158 | loff_t pos; |
Gerd Hoffmann | dac1213 | 2009-04-02 16:59:20 -0700 | [diff] [blame] | 1159 | |
Gerd Hoffmann | 10c7db2 | 2009-04-02 16:59:25 -0700 | [diff] [blame] | 1160 | file = fget_light(fd, &fput_needed); |
Gerd Hoffmann | dac1213 | 2009-04-02 16:59:20 -0700 | [diff] [blame] | 1161 | if (!file) |
| 1162 | return -EBADF; |
Al Viro | 0e665d5 | 2012-08-20 15:28:00 +0100 | [diff] [blame] | 1163 | pos = file->f_pos; |
| 1164 | ret = compat_readv(file, vec, vlen, &pos); |
| 1165 | file->f_pos = pos; |
Gerd Hoffmann | 10c7db2 | 2009-04-02 16:59:25 -0700 | [diff] [blame] | 1166 | fput_light(file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1167 | return ret; |
| 1168 | } |
| 1169 | |
Gerd Hoffmann | f3554f4 | 2009-04-02 16:59:23 -0700 | [diff] [blame] | 1170 | asmlinkage ssize_t |
H. J. Lu | 4ee5c0d | 2012-02-14 13:30:41 -0800 | [diff] [blame] | 1171 | compat_sys_preadv64(unsigned long fd, const struct compat_iovec __user *vec, |
| 1172 | unsigned long vlen, loff_t pos) |
Gerd Hoffmann | f3554f4 | 2009-04-02 16:59:23 -0700 | [diff] [blame] | 1173 | { |
Gerd Hoffmann | f3554f4 | 2009-04-02 16:59:23 -0700 | [diff] [blame] | 1174 | struct file *file; |
Gerd Hoffmann | 10c7db2 | 2009-04-02 16:59:25 -0700 | [diff] [blame] | 1175 | int fput_needed; |
Gerd Hoffmann | f3554f4 | 2009-04-02 16:59:23 -0700 | [diff] [blame] | 1176 | ssize_t ret; |
| 1177 | |
| 1178 | if (pos < 0) |
| 1179 | return -EINVAL; |
Gerd Hoffmann | 10c7db2 | 2009-04-02 16:59:25 -0700 | [diff] [blame] | 1180 | file = fget_light(fd, &fput_needed); |
Gerd Hoffmann | f3554f4 | 2009-04-02 16:59:23 -0700 | [diff] [blame] | 1181 | if (!file) |
| 1182 | return -EBADF; |
Al Viro | 586ce09 | 2011-03-13 01:50:58 -0500 | [diff] [blame] | 1183 | ret = -ESPIPE; |
| 1184 | if (file->f_mode & FMODE_PREAD) |
| 1185 | ret = compat_readv(file, vec, vlen, &pos); |
Gerd Hoffmann | 10c7db2 | 2009-04-02 16:59:25 -0700 | [diff] [blame] | 1186 | fput_light(file, fput_needed); |
Gerd Hoffmann | f3554f4 | 2009-04-02 16:59:23 -0700 | [diff] [blame] | 1187 | return ret; |
| 1188 | } |
| 1189 | |
H. J. Lu | 4ee5c0d | 2012-02-14 13:30:41 -0800 | [diff] [blame] | 1190 | asmlinkage ssize_t |
| 1191 | compat_sys_preadv(unsigned long fd, const struct compat_iovec __user *vec, |
| 1192 | unsigned long vlen, u32 pos_low, u32 pos_high) |
| 1193 | { |
| 1194 | loff_t pos = ((loff_t)pos_high << 32) | pos_low; |
| 1195 | return compat_sys_preadv64(fd, vec, vlen, pos); |
| 1196 | } |
| 1197 | |
Gerd Hoffmann | 6949a63 | 2009-04-02 16:59:21 -0700 | [diff] [blame] | 1198 | static size_t compat_writev(struct file *file, |
| 1199 | const struct compat_iovec __user *vec, |
| 1200 | unsigned long vlen, loff_t *pos) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1201 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1202 | ssize_t ret = -EBADF; |
| 1203 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1204 | if (!(file->f_mode & FMODE_WRITE)) |
| 1205 | goto out; |
| 1206 | |
| 1207 | ret = -EINVAL; |
Badari Pulavarty | ee0b3e6 | 2006-09-30 23:28:47 -0700 | [diff] [blame] | 1208 | 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] | 1209 | goto out; |
| 1210 | |
Gerd Hoffmann | 6949a63 | 2009-04-02 16:59:21 -0700 | [diff] [blame] | 1211 | ret = compat_do_readv_writev(WRITE, file, vec, vlen, pos); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1212 | |
| 1213 | out: |
Gerd Hoffmann | ca8a5bd | 2009-01-06 14:41:09 -0800 | [diff] [blame] | 1214 | if (ret > 0) |
| 1215 | add_wchar(current, ret); |
| 1216 | inc_syscw(current); |
Gerd Hoffmann | 6949a63 | 2009-04-02 16:59:21 -0700 | [diff] [blame] | 1217 | return ret; |
| 1218 | } |
| 1219 | |
| 1220 | asmlinkage ssize_t |
| 1221 | compat_sys_writev(unsigned long fd, const struct compat_iovec __user *vec, |
| 1222 | unsigned long vlen) |
| 1223 | { |
| 1224 | struct file *file; |
Gerd Hoffmann | 10c7db2 | 2009-04-02 16:59:25 -0700 | [diff] [blame] | 1225 | int fput_needed; |
Gerd Hoffmann | 6949a63 | 2009-04-02 16:59:21 -0700 | [diff] [blame] | 1226 | ssize_t ret; |
Al Viro | 0e665d5 | 2012-08-20 15:28:00 +0100 | [diff] [blame] | 1227 | loff_t pos; |
Gerd Hoffmann | 6949a63 | 2009-04-02 16:59:21 -0700 | [diff] [blame] | 1228 | |
Gerd Hoffmann | 10c7db2 | 2009-04-02 16:59:25 -0700 | [diff] [blame] | 1229 | file = fget_light(fd, &fput_needed); |
Gerd Hoffmann | 6949a63 | 2009-04-02 16:59:21 -0700 | [diff] [blame] | 1230 | if (!file) |
| 1231 | return -EBADF; |
Al Viro | 0e665d5 | 2012-08-20 15:28:00 +0100 | [diff] [blame] | 1232 | pos = file->f_pos; |
| 1233 | ret = compat_writev(file, vec, vlen, &pos); |
| 1234 | file->f_pos = pos; |
Gerd Hoffmann | 10c7db2 | 2009-04-02 16:59:25 -0700 | [diff] [blame] | 1235 | fput_light(file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1236 | return ret; |
| 1237 | } |
| 1238 | |
Gerd Hoffmann | f3554f4 | 2009-04-02 16:59:23 -0700 | [diff] [blame] | 1239 | asmlinkage ssize_t |
H. J. Lu | 4ee5c0d | 2012-02-14 13:30:41 -0800 | [diff] [blame] | 1240 | compat_sys_pwritev64(unsigned long fd, const struct compat_iovec __user *vec, |
| 1241 | unsigned long vlen, loff_t pos) |
Gerd Hoffmann | f3554f4 | 2009-04-02 16:59:23 -0700 | [diff] [blame] | 1242 | { |
Gerd Hoffmann | f3554f4 | 2009-04-02 16:59:23 -0700 | [diff] [blame] | 1243 | struct file *file; |
Gerd Hoffmann | 10c7db2 | 2009-04-02 16:59:25 -0700 | [diff] [blame] | 1244 | int fput_needed; |
Gerd Hoffmann | f3554f4 | 2009-04-02 16:59:23 -0700 | [diff] [blame] | 1245 | ssize_t ret; |
| 1246 | |
| 1247 | if (pos < 0) |
| 1248 | return -EINVAL; |
Gerd Hoffmann | 10c7db2 | 2009-04-02 16:59:25 -0700 | [diff] [blame] | 1249 | file = fget_light(fd, &fput_needed); |
Gerd Hoffmann | f3554f4 | 2009-04-02 16:59:23 -0700 | [diff] [blame] | 1250 | if (!file) |
| 1251 | return -EBADF; |
Al Viro | 586ce09 | 2011-03-13 01:50:58 -0500 | [diff] [blame] | 1252 | ret = -ESPIPE; |
| 1253 | if (file->f_mode & FMODE_PWRITE) |
| 1254 | ret = compat_writev(file, vec, vlen, &pos); |
Gerd Hoffmann | 10c7db2 | 2009-04-02 16:59:25 -0700 | [diff] [blame] | 1255 | fput_light(file, fput_needed); |
Gerd Hoffmann | f3554f4 | 2009-04-02 16:59:23 -0700 | [diff] [blame] | 1256 | return ret; |
| 1257 | } |
| 1258 | |
H. J. Lu | 4ee5c0d | 2012-02-14 13:30:41 -0800 | [diff] [blame] | 1259 | asmlinkage ssize_t |
| 1260 | compat_sys_pwritev(unsigned long fd, const struct compat_iovec __user *vec, |
| 1261 | unsigned long vlen, u32 pos_low, u32 pos_high) |
| 1262 | { |
| 1263 | loff_t pos = ((loff_t)pos_high << 32) | pos_low; |
| 1264 | return compat_sys_pwritev64(fd, vec, vlen, pos); |
| 1265 | } |
| 1266 | |
Andi Kleen | d261020 | 2006-05-01 12:15:48 -0700 | [diff] [blame] | 1267 | asmlinkage long |
| 1268 | compat_sys_vmsplice(int fd, const struct compat_iovec __user *iov32, |
| 1269 | unsigned int nr_segs, unsigned int flags) |
| 1270 | { |
| 1271 | unsigned i; |
Al Viro | 90cbad6 | 2006-10-10 22:44:17 +0100 | [diff] [blame] | 1272 | struct iovec __user *iov; |
Jens Axboe | 98232d5 | 2006-05-04 09:13:49 +0200 | [diff] [blame] | 1273 | if (nr_segs > UIO_MAXIOV) |
Andi Kleen | d261020 | 2006-05-01 12:15:48 -0700 | [diff] [blame] | 1274 | return -EINVAL; |
| 1275 | iov = compat_alloc_user_space(nr_segs * sizeof(struct iovec)); |
| 1276 | for (i = 0; i < nr_segs; i++) { |
| 1277 | struct compat_iovec v; |
| 1278 | if (get_user(v.iov_base, &iov32[i].iov_base) || |
| 1279 | get_user(v.iov_len, &iov32[i].iov_len) || |
| 1280 | put_user(compat_ptr(v.iov_base), &iov[i].iov_base) || |
| 1281 | put_user(v.iov_len, &iov[i].iov_len)) |
| 1282 | return -EFAULT; |
| 1283 | } |
| 1284 | return sys_vmsplice(fd, iov, nr_segs, flags); |
| 1285 | } |
| 1286 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1287 | /* |
Miklos Szeredi | e922efc | 2005-09-06 15:18:25 -0700 | [diff] [blame] | 1288 | * Exactly like fs/open.c:sys_open(), except that it doesn't set the |
| 1289 | * O_LARGEFILE flag. |
| 1290 | */ |
| 1291 | asmlinkage long |
Al Viro | a218d0f | 2011-11-21 14:59:34 -0500 | [diff] [blame] | 1292 | compat_sys_open(const char __user *filename, int flags, umode_t mode) |
Miklos Szeredi | e922efc | 2005-09-06 15:18:25 -0700 | [diff] [blame] | 1293 | { |
Ulrich Drepper | 5590ff0 | 2006-01-18 17:43:53 -0800 | [diff] [blame] | 1294 | return do_sys_open(AT_FDCWD, filename, flags, mode); |
| 1295 | } |
| 1296 | |
| 1297 | /* |
| 1298 | * Exactly like fs/open.c:sys_openat(), except that it doesn't set the |
| 1299 | * O_LARGEFILE flag. |
| 1300 | */ |
| 1301 | asmlinkage long |
Al Viro | a218d0f | 2011-11-21 14:59:34 -0500 | [diff] [blame] | 1302 | compat_sys_openat(unsigned int dfd, const char __user *filename, int flags, umode_t mode) |
Ulrich Drepper | 5590ff0 | 2006-01-18 17:43:53 -0800 | [diff] [blame] | 1303 | { |
| 1304 | return do_sys_open(dfd, filename, flags, mode); |
Miklos Szeredi | e922efc | 2005-09-06 15:18:25 -0700 | [diff] [blame] | 1305 | } |
| 1306 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1307 | #define __COMPAT_NFDBITS (8 * sizeof(compat_ulong_t)) |
| 1308 | |
Thomas Gleixner | b773ad4 | 2008-08-31 08:16:57 -0700 | [diff] [blame] | 1309 | static int poll_select_copy_remaining(struct timespec *end_time, void __user *p, |
| 1310 | int timeval, int ret) |
| 1311 | { |
| 1312 | struct timespec ts; |
| 1313 | |
| 1314 | if (!p) |
| 1315 | return ret; |
| 1316 | |
| 1317 | if (current->personality & STICKY_TIMEOUTS) |
| 1318 | goto sticky; |
| 1319 | |
| 1320 | /* No update for zero timeout */ |
| 1321 | if (!end_time->tv_sec && !end_time->tv_nsec) |
| 1322 | return ret; |
| 1323 | |
| 1324 | ktime_get_ts(&ts); |
| 1325 | ts = timespec_sub(*end_time, ts); |
| 1326 | if (ts.tv_sec < 0) |
| 1327 | ts.tv_sec = ts.tv_nsec = 0; |
| 1328 | |
| 1329 | if (timeval) { |
| 1330 | struct compat_timeval rtv; |
| 1331 | |
| 1332 | rtv.tv_sec = ts.tv_sec; |
| 1333 | rtv.tv_usec = ts.tv_nsec / NSEC_PER_USEC; |
| 1334 | |
| 1335 | if (!copy_to_user(p, &rtv, sizeof(rtv))) |
| 1336 | return ret; |
| 1337 | } else { |
| 1338 | struct compat_timespec rts; |
| 1339 | |
| 1340 | rts.tv_sec = ts.tv_sec; |
| 1341 | rts.tv_nsec = ts.tv_nsec; |
| 1342 | |
| 1343 | if (!copy_to_user(p, &rts, sizeof(rts))) |
| 1344 | return ret; |
| 1345 | } |
| 1346 | /* |
| 1347 | * If an application puts its timeval in read-only memory, we |
| 1348 | * don't want the Linux-specific update to the timeval to |
| 1349 | * cause a fault after the select has completed |
| 1350 | * successfully. However, because we're not updating the |
| 1351 | * timeval, we can't restart the system call. |
| 1352 | */ |
| 1353 | |
| 1354 | sticky: |
| 1355 | if (ret == -ERESTARTNOHAND) |
| 1356 | ret = -EINTR; |
| 1357 | return ret; |
| 1358 | } |
| 1359 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1360 | /* |
| 1361 | * Ooo, nasty. We need here to frob 32-bit unsigned longs to |
| 1362 | * 64-bit unsigned longs. |
| 1363 | */ |
Arjan van de Ven | 858119e | 2006-01-14 13:20:43 -0800 | [diff] [blame] | 1364 | static |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1365 | int compat_get_fd_set(unsigned long nr, compat_ulong_t __user *ufdset, |
| 1366 | unsigned long *fdset) |
| 1367 | { |
Milind Arun Choudhary | 022a169 | 2007-05-08 00:29:02 -0700 | [diff] [blame] | 1368 | nr = DIV_ROUND_UP(nr, __COMPAT_NFDBITS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1369 | if (ufdset) { |
| 1370 | unsigned long odd; |
| 1371 | |
| 1372 | if (!access_ok(VERIFY_WRITE, ufdset, nr*sizeof(compat_ulong_t))) |
| 1373 | return -EFAULT; |
| 1374 | |
| 1375 | odd = nr & 1UL; |
| 1376 | nr &= ~1UL; |
| 1377 | while (nr) { |
| 1378 | unsigned long h, l; |
Heiko Carstens | 7116e99 | 2006-12-06 20:36:36 -0800 | [diff] [blame] | 1379 | if (__get_user(l, ufdset) || __get_user(h, ufdset+1)) |
| 1380 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1381 | ufdset += 2; |
| 1382 | *fdset++ = h << 32 | l; |
| 1383 | nr -= 2; |
| 1384 | } |
Heiko Carstens | 7116e99 | 2006-12-06 20:36:36 -0800 | [diff] [blame] | 1385 | if (odd && __get_user(*fdset, ufdset)) |
| 1386 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1387 | } else { |
| 1388 | /* Tricky, must clear full unsigned long in the |
| 1389 | * kernel fdset at the end, this makes sure that |
| 1390 | * actually happens. |
| 1391 | */ |
| 1392 | memset(fdset, 0, ((nr + 1) & ~1)*sizeof(compat_ulong_t)); |
| 1393 | } |
| 1394 | return 0; |
| 1395 | } |
| 1396 | |
Arjan van de Ven | 858119e | 2006-01-14 13:20:43 -0800 | [diff] [blame] | 1397 | static |
Heiko Carstens | 7116e99 | 2006-12-06 20:36:36 -0800 | [diff] [blame] | 1398 | int compat_set_fd_set(unsigned long nr, compat_ulong_t __user *ufdset, |
| 1399 | unsigned long *fdset) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1400 | { |
| 1401 | unsigned long odd; |
Milind Arun Choudhary | 022a169 | 2007-05-08 00:29:02 -0700 | [diff] [blame] | 1402 | nr = DIV_ROUND_UP(nr, __COMPAT_NFDBITS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1403 | |
| 1404 | if (!ufdset) |
Heiko Carstens | 7116e99 | 2006-12-06 20:36:36 -0800 | [diff] [blame] | 1405 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1406 | |
| 1407 | odd = nr & 1UL; |
| 1408 | nr &= ~1UL; |
| 1409 | while (nr) { |
| 1410 | unsigned long h, l; |
| 1411 | l = *fdset++; |
| 1412 | h = l >> 32; |
Heiko Carstens | 7116e99 | 2006-12-06 20:36:36 -0800 | [diff] [blame] | 1413 | if (__put_user(l, ufdset) || __put_user(h, ufdset+1)) |
| 1414 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1415 | ufdset += 2; |
| 1416 | nr -= 2; |
| 1417 | } |
Heiko Carstens | 7116e99 | 2006-12-06 20:36:36 -0800 | [diff] [blame] | 1418 | if (odd && __put_user(*fdset, ufdset)) |
| 1419 | return -EFAULT; |
| 1420 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1421 | } |
| 1422 | |
| 1423 | |
| 1424 | /* |
| 1425 | * This is a virtual copy of sys_select from fs/select.c and probably |
| 1426 | * should be compared to it from time to time |
| 1427 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1428 | |
| 1429 | /* |
| 1430 | * We can actually return ERESTARTSYS instead of EINTR, but I'd |
| 1431 | * like to be certain this leads to no problems. So I return |
| 1432 | * EINTR just for safety. |
| 1433 | * |
| 1434 | * Update: ERESTARTSYS breaks at least the xview clock binary, so |
| 1435 | * I'm trying ERESTARTNOHAND which restart only when you want to. |
| 1436 | */ |
David Woodhouse | 9f72949 | 2006-01-18 17:44:05 -0800 | [diff] [blame] | 1437 | 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] | 1438 | compat_ulong_t __user *outp, compat_ulong_t __user *exp, |
| 1439 | struct timespec *end_time) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1440 | { |
| 1441 | fd_set_bits fds; |
Badari Pulavarty | 6087b2d | 2007-05-23 13:57:45 -0700 | [diff] [blame] | 1442 | void *bits; |
Vadim Lobanov | bbea9f6 | 2006-12-10 02:21:12 -0800 | [diff] [blame] | 1443 | int size, max_fds, ret = -EINVAL; |
Linus Torvalds | a4531ed | 2005-09-09 15:10:52 -0700 | [diff] [blame] | 1444 | struct fdtable *fdt; |
Badari Pulavarty | 6087b2d | 2007-05-23 13:57:45 -0700 | [diff] [blame] | 1445 | long stack_fds[SELECT_STACK_ALLOC/sizeof(long)]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1446 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1447 | if (n < 0) |
| 1448 | goto out_nofds; |
| 1449 | |
Vadim Lobanov | bbea9f6 | 2006-12-10 02:21:12 -0800 | [diff] [blame] | 1450 | /* max_fds can increase, so grab it once to avoid race */ |
Linus Torvalds | ac5b8b6 | 2005-09-09 15:42:34 -0700 | [diff] [blame] | 1451 | rcu_read_lock(); |
Linus Torvalds | a4531ed | 2005-09-09 15:10:52 -0700 | [diff] [blame] | 1452 | fdt = files_fdtable(current->files); |
Vadim Lobanov | bbea9f6 | 2006-12-10 02:21:12 -0800 | [diff] [blame] | 1453 | max_fds = fdt->max_fds; |
Linus Torvalds | ac5b8b6 | 2005-09-09 15:42:34 -0700 | [diff] [blame] | 1454 | rcu_read_unlock(); |
Vadim Lobanov | bbea9f6 | 2006-12-10 02:21:12 -0800 | [diff] [blame] | 1455 | if (n > max_fds) |
| 1456 | n = max_fds; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1457 | |
| 1458 | /* |
| 1459 | * We need 6 bitmaps (in/out/ex for both incoming and outgoing), |
| 1460 | * since we used fdset we need to allocate memory in units of |
| 1461 | * long-words. |
| 1462 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1463 | size = FDS_BYTES(n); |
Badari Pulavarty | 6087b2d | 2007-05-23 13:57:45 -0700 | [diff] [blame] | 1464 | bits = stack_fds; |
| 1465 | if (size > sizeof(stack_fds) / 6) { |
| 1466 | bits = kmalloc(6 * size, GFP_KERNEL); |
| 1467 | ret = -ENOMEM; |
| 1468 | if (!bits) |
| 1469 | goto out_nofds; |
| 1470 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1471 | fds.in = (unsigned long *) bits; |
| 1472 | fds.out = (unsigned long *) (bits + size); |
| 1473 | fds.ex = (unsigned long *) (bits + 2*size); |
| 1474 | fds.res_in = (unsigned long *) (bits + 3*size); |
| 1475 | fds.res_out = (unsigned long *) (bits + 4*size); |
| 1476 | fds.res_ex = (unsigned long *) (bits + 5*size); |
| 1477 | |
| 1478 | if ((ret = compat_get_fd_set(n, inp, fds.in)) || |
| 1479 | (ret = compat_get_fd_set(n, outp, fds.out)) || |
| 1480 | (ret = compat_get_fd_set(n, exp, fds.ex))) |
| 1481 | goto out; |
| 1482 | zero_fd_set(n, fds.res_in); |
| 1483 | zero_fd_set(n, fds.res_out); |
| 1484 | zero_fd_set(n, fds.res_ex); |
| 1485 | |
Arjan van de Ven | 8ff3e8e | 2008-08-31 08:26:40 -0700 | [diff] [blame] | 1486 | ret = do_select(n, &fds, end_time); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1487 | |
| 1488 | if (ret < 0) |
| 1489 | goto out; |
| 1490 | if (!ret) { |
| 1491 | ret = -ERESTARTNOHAND; |
| 1492 | if (signal_pending(current)) |
| 1493 | goto out; |
| 1494 | ret = 0; |
| 1495 | } |
| 1496 | |
Heiko Carstens | 7116e99 | 2006-12-06 20:36:36 -0800 | [diff] [blame] | 1497 | if (compat_set_fd_set(n, inp, fds.res_in) || |
| 1498 | compat_set_fd_set(n, outp, fds.res_out) || |
| 1499 | compat_set_fd_set(n, exp, fds.res_ex)) |
| 1500 | ret = -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1501 | out: |
Badari Pulavarty | 6087b2d | 2007-05-23 13:57:45 -0700 | [diff] [blame] | 1502 | if (bits != stack_fds) |
| 1503 | kfree(bits); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1504 | out_nofds: |
| 1505 | return ret; |
| 1506 | } |
| 1507 | |
David Woodhouse | 9f72949 | 2006-01-18 17:44:05 -0800 | [diff] [blame] | 1508 | asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp, |
| 1509 | compat_ulong_t __user *outp, compat_ulong_t __user *exp, |
| 1510 | struct compat_timeval __user *tvp) |
| 1511 | { |
Arjan van de Ven | 8ff3e8e | 2008-08-31 08:26:40 -0700 | [diff] [blame] | 1512 | struct timespec end_time, *to = NULL; |
David Woodhouse | 9f72949 | 2006-01-18 17:44:05 -0800 | [diff] [blame] | 1513 | struct compat_timeval tv; |
| 1514 | int ret; |
| 1515 | |
| 1516 | if (tvp) { |
| 1517 | if (copy_from_user(&tv, tvp, sizeof(tv))) |
| 1518 | return -EFAULT; |
| 1519 | |
Arjan van de Ven | 8ff3e8e | 2008-08-31 08:26:40 -0700 | [diff] [blame] | 1520 | to = &end_time; |
Arjan van de Ven | 4d36a9e | 2008-10-25 12:41:41 -0700 | [diff] [blame] | 1521 | if (poll_select_set_timeout(to, |
| 1522 | tv.tv_sec + (tv.tv_usec / USEC_PER_SEC), |
| 1523 | (tv.tv_usec % USEC_PER_SEC) * NSEC_PER_USEC)) |
David Woodhouse | 9f72949 | 2006-01-18 17:44:05 -0800 | [diff] [blame] | 1524 | return -EINVAL; |
David Woodhouse | 9f72949 | 2006-01-18 17:44:05 -0800 | [diff] [blame] | 1525 | } |
| 1526 | |
Arjan van de Ven | 8ff3e8e | 2008-08-31 08:26:40 -0700 | [diff] [blame] | 1527 | ret = compat_core_sys_select(n, inp, outp, exp, to); |
| 1528 | ret = poll_select_copy_remaining(&end_time, tvp, 1, ret); |
David Woodhouse | 9f72949 | 2006-01-18 17:44:05 -0800 | [diff] [blame] | 1529 | |
| 1530 | return ret; |
| 1531 | } |
| 1532 | |
Christoph Hellwig | 5d0e528 | 2010-03-10 15:21:13 -0800 | [diff] [blame] | 1533 | struct compat_sel_arg_struct { |
| 1534 | compat_ulong_t n; |
| 1535 | compat_uptr_t inp; |
| 1536 | compat_uptr_t outp; |
| 1537 | compat_uptr_t exp; |
| 1538 | compat_uptr_t tvp; |
| 1539 | }; |
| 1540 | |
| 1541 | asmlinkage long compat_sys_old_select(struct compat_sel_arg_struct __user *arg) |
| 1542 | { |
| 1543 | struct compat_sel_arg_struct a; |
| 1544 | |
| 1545 | if (copy_from_user(&a, arg, sizeof(a))) |
| 1546 | return -EFAULT; |
| 1547 | return compat_sys_select(a.n, compat_ptr(a.inp), compat_ptr(a.outp), |
| 1548 | compat_ptr(a.exp), compat_ptr(a.tvp)); |
| 1549 | } |
| 1550 | |
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 | } |
David Woodhouse | 9f72949 | 2006-01-18 17:44:05 -0800 | [diff] [blame] | 1673 | |
Davide Libenzi | f6dfb4f | 2007-03-07 20:41:21 -0800 | [diff] [blame] | 1674 | #ifdef CONFIG_EPOLL |
| 1675 | |
Davide Libenzi | f6dfb4f | 2007-03-07 20:41:21 -0800 | [diff] [blame] | 1676 | asmlinkage long compat_sys_epoll_pwait(int epfd, |
| 1677 | struct compat_epoll_event __user *events, |
| 1678 | int maxevents, int timeout, |
| 1679 | const compat_sigset_t __user *sigmask, |
| 1680 | compat_size_t sigsetsize) |
| 1681 | { |
| 1682 | long err; |
| 1683 | compat_sigset_t csigmask; |
| 1684 | sigset_t ksigmask, sigsaved; |
| 1685 | |
| 1686 | /* |
| 1687 | * If the caller wants a certain signal mask to be set during the wait, |
| 1688 | * we apply it here. |
| 1689 | */ |
| 1690 | if (sigmask) { |
| 1691 | if (sigsetsize != sizeof(compat_sigset_t)) |
| 1692 | return -EINVAL; |
| 1693 | if (copy_from_user(&csigmask, sigmask, sizeof(csigmask))) |
| 1694 | return -EFAULT; |
| 1695 | sigset_from_compat(&ksigmask, &csigmask); |
| 1696 | sigdelsetmask(&ksigmask, sigmask(SIGKILL) | sigmask(SIGSTOP)); |
| 1697 | sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved); |
| 1698 | } |
| 1699 | |
Davide Libenzi | f6dfb4f | 2007-03-07 20:41:21 -0800 | [diff] [blame] | 1700 | err = sys_epoll_wait(epfd, events, maxevents, timeout); |
Davide Libenzi | f6dfb4f | 2007-03-07 20:41:21 -0800 | [diff] [blame] | 1701 | |
| 1702 | /* |
| 1703 | * If we changed the signal mask, we need to restore the original one. |
| 1704 | * In case we've got a signal while waiting, we do not restore the |
| 1705 | * signal mask yet, and we allow do_signal() to deliver the signal on |
| 1706 | * the way back to userspace, before the signal mask is restored. |
| 1707 | */ |
| 1708 | if (sigmask) { |
| 1709 | if (err == -EINTR) { |
| 1710 | memcpy(¤t->saved_sigmask, &sigsaved, |
| 1711 | sizeof(sigsaved)); |
Roland McGrath | 4e4c22c | 2008-04-30 00:53:06 -0700 | [diff] [blame] | 1712 | set_restore_sigmask(); |
Davide Libenzi | f6dfb4f | 2007-03-07 20:41:21 -0800 | [diff] [blame] | 1713 | } else |
| 1714 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); |
| 1715 | } |
| 1716 | |
| 1717 | return err; |
| 1718 | } |
Davide Libenzi | f6dfb4f | 2007-03-07 20:41:21 -0800 | [diff] [blame] | 1719 | |
| 1720 | #endif /* CONFIG_EPOLL */ |
Davide Libenzi | 6d18c92 | 2007-05-10 22:23:15 -0700 | [diff] [blame] | 1721 | |
| 1722 | #ifdef CONFIG_SIGNALFD |
| 1723 | |
Ulrich Drepper | 9deb27b | 2008-07-23 21:29:24 -0700 | [diff] [blame] | 1724 | asmlinkage long compat_sys_signalfd4(int ufd, |
| 1725 | const compat_sigset_t __user *sigmask, |
| 1726 | compat_size_t sigsetsize, int flags) |
Davide Libenzi | 6d18c92 | 2007-05-10 22:23:15 -0700 | [diff] [blame] | 1727 | { |
| 1728 | compat_sigset_t ss32; |
| 1729 | sigset_t tmp; |
| 1730 | sigset_t __user *ksigmask; |
| 1731 | |
| 1732 | if (sigsetsize != sizeof(compat_sigset_t)) |
| 1733 | return -EINVAL; |
| 1734 | if (copy_from_user(&ss32, sigmask, sizeof(ss32))) |
| 1735 | return -EFAULT; |
| 1736 | sigset_from_compat(&tmp, &ss32); |
| 1737 | ksigmask = compat_alloc_user_space(sizeof(sigset_t)); |
| 1738 | if (copy_to_user(ksigmask, &tmp, sizeof(sigset_t))) |
| 1739 | return -EFAULT; |
| 1740 | |
Ulrich Drepper | 9deb27b | 2008-07-23 21:29:24 -0700 | [diff] [blame] | 1741 | return sys_signalfd4(ufd, ksigmask, sizeof(sigset_t), flags); |
Davide Libenzi | 6d18c92 | 2007-05-10 22:23:15 -0700 | [diff] [blame] | 1742 | } |
| 1743 | |
Ulrich Drepper | 9deb27b | 2008-07-23 21:29:24 -0700 | [diff] [blame] | 1744 | asmlinkage long compat_sys_signalfd(int ufd, |
| 1745 | const compat_sigset_t __user *sigmask, |
| 1746 | compat_size_t sigsetsize) |
| 1747 | { |
| 1748 | return compat_sys_signalfd4(ufd, sigmask, sigsetsize, 0); |
| 1749 | } |
Davide Libenzi | 6d18c92 | 2007-05-10 22:23:15 -0700 | [diff] [blame] | 1750 | #endif /* CONFIG_SIGNALFD */ |
| 1751 | |
Davide Libenzi | 83f5d12 | 2007-05-10 22:23:18 -0700 | [diff] [blame] | 1752 | #ifdef CONFIG_TIMERFD |
| 1753 | |
Davide Libenzi | 4d672e7 | 2008-02-04 22:27:26 -0800 | [diff] [blame] | 1754 | asmlinkage long compat_sys_timerfd_settime(int ufd, int flags, |
| 1755 | const struct compat_itimerspec __user *utmr, |
| 1756 | struct compat_itimerspec __user *otmr) |
Davide Libenzi | 83f5d12 | 2007-05-10 22:23:18 -0700 | [diff] [blame] | 1757 | { |
Davide Libenzi | 4d672e7 | 2008-02-04 22:27:26 -0800 | [diff] [blame] | 1758 | int error; |
Davide Libenzi | 83f5d12 | 2007-05-10 22:23:18 -0700 | [diff] [blame] | 1759 | struct itimerspec t; |
| 1760 | struct itimerspec __user *ut; |
| 1761 | |
Davide Libenzi | 83f5d12 | 2007-05-10 22:23:18 -0700 | [diff] [blame] | 1762 | if (get_compat_itimerspec(&t, utmr)) |
Heiko Carstens | 8317f14 | 2007-05-16 22:11:08 -0700 | [diff] [blame] | 1763 | return -EFAULT; |
Davide Libenzi | 4d672e7 | 2008-02-04 22:27:26 -0800 | [diff] [blame] | 1764 | ut = compat_alloc_user_space(2 * sizeof(struct itimerspec)); |
| 1765 | if (copy_to_user(&ut[0], &t, sizeof(t))) |
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 | error = sys_timerfd_settime(ufd, flags, &ut[0], &ut[1]); |
| 1768 | if (!error && otmr) |
| 1769 | error = (copy_from_user(&t, &ut[1], sizeof(struct itimerspec)) || |
| 1770 | put_compat_itimerspec(otmr, &t)) ? -EFAULT: 0; |
Davide Libenzi | 83f5d12 | 2007-05-10 22:23:18 -0700 | [diff] [blame] | 1771 | |
Davide Libenzi | 4d672e7 | 2008-02-04 22:27:26 -0800 | [diff] [blame] | 1772 | return error; |
| 1773 | } |
| 1774 | |
| 1775 | asmlinkage long compat_sys_timerfd_gettime(int ufd, |
| 1776 | struct compat_itimerspec __user *otmr) |
| 1777 | { |
| 1778 | int error; |
| 1779 | struct itimerspec t; |
| 1780 | struct itimerspec __user *ut; |
| 1781 | |
| 1782 | ut = compat_alloc_user_space(sizeof(struct itimerspec)); |
| 1783 | error = sys_timerfd_gettime(ufd, ut); |
| 1784 | if (!error) |
| 1785 | error = (copy_from_user(&t, ut, sizeof(struct itimerspec)) || |
| 1786 | put_compat_itimerspec(otmr, &t)) ? -EFAULT: 0; |
| 1787 | |
| 1788 | return error; |
Davide Libenzi | 83f5d12 | 2007-05-10 22:23:18 -0700 | [diff] [blame] | 1789 | } |
| 1790 | |
| 1791 | #endif /* CONFIG_TIMERFD */ |
Aneesh Kumar K.V | becfd1f | 2011-01-29 18:43:26 +0530 | [diff] [blame] | 1792 | |
| 1793 | #ifdef CONFIG_FHANDLE |
| 1794 | /* |
| 1795 | * Exactly like fs/open.c:sys_open_by_handle_at(), except that it |
| 1796 | * doesn't set the O_LARGEFILE flag. |
| 1797 | */ |
| 1798 | asmlinkage long |
| 1799 | compat_sys_open_by_handle_at(int mountdirfd, |
| 1800 | struct file_handle __user *handle, int flags) |
| 1801 | { |
| 1802 | return do_handle_open(mountdirfd, handle, flags); |
| 1803 | } |
| 1804 | #endif |