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 |
| 11 | * Copyright (C) 2003 Pavel Machek (pavel@suse.cz) |
| 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 | |
Milind Arun Choudhary | 022a169 | 2007-05-08 00:29:02 -0700 | [diff] [blame] | 18 | #include <linux/kernel.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | #include <linux/linkage.h> |
| 20 | #include <linux/compat.h> |
| 21 | #include <linux/errno.h> |
| 22 | #include <linux/time.h> |
| 23 | #include <linux/fs.h> |
| 24 | #include <linux/fcntl.h> |
| 25 | #include <linux/namei.h> |
| 26 | #include <linux/file.h> |
Al Viro | 9f3acc3 | 2008-04-24 07:44:08 -0400 | [diff] [blame] | 27 | #include <linux/fdtable.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | #include <linux/vfs.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | #include <linux/ioctl.h> |
| 30 | #include <linux/init.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | #include <linux/smb.h> |
| 32 | #include <linux/smb_mount.h> |
| 33 | #include <linux/ncp_mount.h> |
David Howells | 9a9947b | 2005-04-18 10:54:51 -0700 | [diff] [blame] | 34 | #include <linux/nfs4_mount.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | #include <linux/syscalls.h> |
| 36 | #include <linux/ctype.h> |
| 37 | #include <linux/module.h> |
| 38 | #include <linux/dirent.h> |
Robert Love | 0eeca28 | 2005-07-12 17:06:03 -0400 | [diff] [blame] | 39 | #include <linux/fsnotify.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | #include <linux/highuid.h> |
| 41 | #include <linux/sunrpc/svc.h> |
| 42 | #include <linux/nfsd/nfsd.h> |
| 43 | #include <linux/nfsd/syscall.h> |
| 44 | #include <linux/personality.h> |
| 45 | #include <linux/rwsem.h> |
Jay Lan | 8f0ab51 | 2006-09-30 23:28:59 -0700 | [diff] [blame] | 46 | #include <linux/tsacct_kern.h> |
Christoph Hellwig | 6272e26 | 2007-05-08 00:29:21 -0700 | [diff] [blame] | 47 | #include <linux/security.h> |
Al Viro | a1f8e7f | 2006-10-19 16:08:53 -0400 | [diff] [blame] | 48 | #include <linux/highmem.h> |
Davide Libenzi | 6d18c92 | 2007-05-10 22:23:15 -0700 | [diff] [blame] | 49 | #include <linux/signal.h> |
Al Viro | bd01f84 | 2006-10-19 17:23:57 -0400 | [diff] [blame] | 50 | #include <linux/poll.h> |
David S. Miller | 4a805e8 | 2005-09-14 21:40:00 -0700 | [diff] [blame] | 51 | #include <linux/mm.h> |
Davide Libenzi | f6dfb4f | 2007-03-07 20:41:21 -0800 | [diff] [blame] | 52 | #include <linux/eventpoll.h> |
Al Viro | 498052b | 2009-03-30 07:20:30 -0400 | [diff] [blame] | 53 | #include <linux/fs_struct.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | #include <asm/uaccess.h> |
| 56 | #include <asm/mmu_context.h> |
| 57 | #include <asm/ioctls.h> |
David Howells | 07f3f05 | 2006-09-30 20:52:18 +0200 | [diff] [blame] | 58 | #include "internal.h" |
David Woodhouse | 9f72949 | 2006-01-18 17:44:05 -0800 | [diff] [blame] | 59 | |
Andi Kleen | bebfa10 | 2006-06-26 13:56:52 +0200 | [diff] [blame] | 60 | int compat_log = 1; |
| 61 | |
| 62 | int compat_printk(const char *fmt, ...) |
| 63 | { |
| 64 | va_list ap; |
| 65 | int ret; |
| 66 | if (!compat_log) |
| 67 | return 0; |
| 68 | va_start(ap, fmt); |
| 69 | ret = vprintk(fmt, ap); |
| 70 | va_end(ap); |
| 71 | return ret; |
| 72 | } |
| 73 | |
Badari Pulavarty | ee0b3e6 | 2006-09-30 23:28:47 -0700 | [diff] [blame] | 74 | #include "read_write.h" |
| 75 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | /* |
| 77 | * Not all architectures have sys_utime, so implement this in terms |
| 78 | * of sys_utimes. |
| 79 | */ |
| 80 | asmlinkage long compat_sys_utime(char __user *filename, struct compat_utimbuf __user *t) |
| 81 | { |
Ulrich Drepper | 1c710c8 | 2007-05-08 00:33:25 -0700 | [diff] [blame] | 82 | struct timespec tv[2]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | |
| 84 | if (t) { |
| 85 | if (get_user(tv[0].tv_sec, &t->actime) || |
| 86 | get_user(tv[1].tv_sec, &t->modtime)) |
| 87 | return -EFAULT; |
Ulrich Drepper | 1c710c8 | 2007-05-08 00:33:25 -0700 | [diff] [blame] | 88 | tv[0].tv_nsec = 0; |
| 89 | tv[1].tv_nsec = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | } |
Ulrich Drepper | 1c710c8 | 2007-05-08 00:33:25 -0700 | [diff] [blame] | 91 | return do_utimes(AT_FDCWD, filename, t ? tv : NULL, 0); |
| 92 | } |
| 93 | |
| 94 | asmlinkage long compat_sys_utimensat(unsigned int dfd, char __user *filename, struct compat_timespec __user *t, int flags) |
| 95 | { |
| 96 | struct timespec tv[2]; |
| 97 | |
| 98 | if (t) { |
| 99 | if (get_compat_timespec(&tv[0], &t[0]) || |
| 100 | get_compat_timespec(&tv[1], &t[1])) |
| 101 | return -EFAULT; |
| 102 | |
| 103 | if ((tv[0].tv_nsec == UTIME_OMIT || tv[0].tv_nsec == UTIME_NOW) |
| 104 | && tv[0].tv_sec != 0) |
| 105 | return -EINVAL; |
| 106 | if ((tv[1].tv_nsec == UTIME_OMIT || tv[1].tv_nsec == UTIME_NOW) |
| 107 | && tv[1].tv_sec != 0) |
| 108 | return -EINVAL; |
| 109 | |
| 110 | if (tv[0].tv_nsec == UTIME_OMIT && tv[1].tv_nsec == UTIME_OMIT) |
| 111 | return 0; |
| 112 | } |
| 113 | return do_utimes(dfd, filename, t ? tv : NULL, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | } |
| 115 | |
Stephen Rothwell | 9ad11ab | 2006-02-02 16:11:51 +1100 | [diff] [blame] | 116 | asmlinkage long compat_sys_futimesat(unsigned int dfd, char __user *filename, struct compat_timeval __user *t) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 117 | { |
Ulrich Drepper | 1c710c8 | 2007-05-08 00:33:25 -0700 | [diff] [blame] | 118 | struct timespec tv[2]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 119 | |
Stephen Rothwell | 9ad11ab | 2006-02-02 16:11:51 +1100 | [diff] [blame] | 120 | if (t) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | if (get_user(tv[0].tv_sec, &t[0].tv_sec) || |
Ulrich Drepper | 1c710c8 | 2007-05-08 00:33:25 -0700 | [diff] [blame] | 122 | get_user(tv[0].tv_nsec, &t[0].tv_usec) || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | get_user(tv[1].tv_sec, &t[1].tv_sec) || |
Ulrich Drepper | 1c710c8 | 2007-05-08 00:33:25 -0700 | [diff] [blame] | 124 | get_user(tv[1].tv_nsec, &t[1].tv_usec)) |
Stephen Rothwell | 9ad11ab | 2006-02-02 16:11:51 +1100 | [diff] [blame] | 125 | return -EFAULT; |
Ulrich Drepper | 1c710c8 | 2007-05-08 00:33:25 -0700 | [diff] [blame] | 126 | if (tv[0].tv_nsec >= 1000000 || tv[0].tv_nsec < 0 || |
| 127 | tv[1].tv_nsec >= 1000000 || tv[1].tv_nsec < 0) |
| 128 | return -EINVAL; |
| 129 | tv[0].tv_nsec *= 1000; |
| 130 | tv[1].tv_nsec *= 1000; |
Stephen Rothwell | 9ad11ab | 2006-02-02 16:11:51 +1100 | [diff] [blame] | 131 | } |
Ulrich Drepper | 1c710c8 | 2007-05-08 00:33:25 -0700 | [diff] [blame] | 132 | return do_utimes(dfd, filename, t ? tv : NULL, 0); |
Ulrich Drepper | 5590ff0 | 2006-01-18 17:43:53 -0800 | [diff] [blame] | 133 | } |
| 134 | |
| 135 | asmlinkage long compat_sys_utimes(char __user *filename, struct compat_timeval __user *t) |
| 136 | { |
| 137 | return compat_sys_futimesat(AT_FDCWD, filename, t); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | } |
| 139 | |
Christoph Hellwig | f7a5000 | 2008-10-15 22:02:05 -0700 | [diff] [blame] | 140 | static int cp_compat_stat(struct kstat *stat, struct compat_stat __user *ubuf) |
| 141 | { |
| 142 | compat_ino_t ino = stat->ino; |
| 143 | typeof(ubuf->st_uid) uid = 0; |
| 144 | typeof(ubuf->st_gid) gid = 0; |
| 145 | int err; |
| 146 | |
| 147 | SET_UID(uid, stat->uid); |
| 148 | SET_GID(gid, stat->gid); |
| 149 | |
| 150 | if ((u64) stat->size > MAX_NON_LFS || |
| 151 | !old_valid_dev(stat->dev) || |
| 152 | !old_valid_dev(stat->rdev)) |
| 153 | return -EOVERFLOW; |
| 154 | if (sizeof(ino) < sizeof(stat->ino) && ino != stat->ino) |
| 155 | return -EOVERFLOW; |
| 156 | |
| 157 | if (clear_user(ubuf, sizeof(*ubuf))) |
| 158 | return -EFAULT; |
| 159 | |
| 160 | err = __put_user(old_encode_dev(stat->dev), &ubuf->st_dev); |
| 161 | err |= __put_user(ino, &ubuf->st_ino); |
| 162 | err |= __put_user(stat->mode, &ubuf->st_mode); |
| 163 | err |= __put_user(stat->nlink, &ubuf->st_nlink); |
| 164 | err |= __put_user(uid, &ubuf->st_uid); |
| 165 | err |= __put_user(gid, &ubuf->st_gid); |
| 166 | err |= __put_user(old_encode_dev(stat->rdev), &ubuf->st_rdev); |
| 167 | err |= __put_user(stat->size, &ubuf->st_size); |
| 168 | err |= __put_user(stat->atime.tv_sec, &ubuf->st_atime); |
| 169 | err |= __put_user(stat->atime.tv_nsec, &ubuf->st_atime_nsec); |
| 170 | err |= __put_user(stat->mtime.tv_sec, &ubuf->st_mtime); |
| 171 | err |= __put_user(stat->mtime.tv_nsec, &ubuf->st_mtime_nsec); |
| 172 | err |= __put_user(stat->ctime.tv_sec, &ubuf->st_ctime); |
| 173 | err |= __put_user(stat->ctime.tv_nsec, &ubuf->st_ctime_nsec); |
| 174 | err |= __put_user(stat->blksize, &ubuf->st_blksize); |
| 175 | err |= __put_user(stat->blocks, &ubuf->st_blocks); |
| 176 | return err; |
| 177 | } |
| 178 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 179 | asmlinkage long compat_sys_newstat(char __user * filename, |
| 180 | struct compat_stat __user *statbuf) |
| 181 | { |
| 182 | struct kstat stat; |
Christoph Hellwig | 2eae7a1 | 2009-04-08 16:34:03 -0400 | [diff] [blame] | 183 | int error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 184 | |
Christoph Hellwig | 2eae7a1 | 2009-04-08 16:34:03 -0400 | [diff] [blame] | 185 | error = vfs_stat(filename, &stat); |
| 186 | if (error) |
| 187 | return error; |
| 188 | return cp_compat_stat(&stat, statbuf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 189 | } |
| 190 | |
| 191 | asmlinkage long compat_sys_newlstat(char __user * filename, |
| 192 | struct compat_stat __user *statbuf) |
| 193 | { |
| 194 | struct kstat stat; |
Christoph Hellwig | 2eae7a1 | 2009-04-08 16:34:03 -0400 | [diff] [blame] | 195 | int error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 196 | |
Christoph Hellwig | 2eae7a1 | 2009-04-08 16:34:03 -0400 | [diff] [blame] | 197 | error = vfs_lstat(filename, &stat); |
| 198 | if (error) |
| 199 | return error; |
| 200 | return cp_compat_stat(&stat, statbuf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 201 | } |
| 202 | |
Kyle McMartin | 82d821d | 2006-03-24 03:18:20 -0800 | [diff] [blame] | 203 | #ifndef __ARCH_WANT_STAT64 |
Stephen Rothwell | 9ad11ab | 2006-02-02 16:11:51 +1100 | [diff] [blame] | 204 | asmlinkage long compat_sys_newfstatat(unsigned int dfd, char __user *filename, |
Ulrich Drepper | 5590ff0 | 2006-01-18 17:43:53 -0800 | [diff] [blame] | 205 | struct compat_stat __user *statbuf, int flag) |
| 206 | { |
| 207 | struct kstat stat; |
Oleg Drokin | 0112fc2 | 2009-04-08 20:05:42 +0400 | [diff] [blame] | 208 | int error; |
Ulrich Drepper | 5590ff0 | 2006-01-18 17:43:53 -0800 | [diff] [blame] | 209 | |
Oleg Drokin | 0112fc2 | 2009-04-08 20:05:42 +0400 | [diff] [blame] | 210 | error = vfs_fstatat(dfd, filename, &stat, flag); |
| 211 | if (error) |
| 212 | return error; |
| 213 | return cp_compat_stat(&stat, statbuf); |
Ulrich Drepper | 5590ff0 | 2006-01-18 17:43:53 -0800 | [diff] [blame] | 214 | } |
Kyle McMartin | 82d821d | 2006-03-24 03:18:20 -0800 | [diff] [blame] | 215 | #endif |
Ulrich Drepper | 5590ff0 | 2006-01-18 17:43:53 -0800 | [diff] [blame] | 216 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 217 | asmlinkage long compat_sys_newfstat(unsigned int fd, |
| 218 | struct compat_stat __user * statbuf) |
| 219 | { |
| 220 | struct kstat stat; |
| 221 | int error = vfs_fstat(fd, &stat); |
| 222 | |
| 223 | if (!error) |
| 224 | error = cp_compat_stat(&stat, statbuf); |
| 225 | return error; |
| 226 | } |
| 227 | |
| 228 | static int put_compat_statfs(struct compat_statfs __user *ubuf, struct kstatfs *kbuf) |
| 229 | { |
| 230 | |
| 231 | if (sizeof ubuf->f_blocks == 4) { |
Jon Tollefson | f4a67cc | 2008-07-23 21:27:55 -0700 | [diff] [blame] | 232 | if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail | |
| 233 | kbuf->f_bsize | kbuf->f_frsize) & 0xffffffff00000000ULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | return -EOVERFLOW; |
| 235 | /* f_files and f_ffree may be -1; it's okay |
| 236 | * to stuff that into 32 bits */ |
| 237 | if (kbuf->f_files != 0xffffffffffffffffULL |
| 238 | && (kbuf->f_files & 0xffffffff00000000ULL)) |
| 239 | return -EOVERFLOW; |
| 240 | if (kbuf->f_ffree != 0xffffffffffffffffULL |
| 241 | && (kbuf->f_ffree & 0xffffffff00000000ULL)) |
| 242 | return -EOVERFLOW; |
| 243 | } |
| 244 | if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) || |
| 245 | __put_user(kbuf->f_type, &ubuf->f_type) || |
| 246 | __put_user(kbuf->f_bsize, &ubuf->f_bsize) || |
| 247 | __put_user(kbuf->f_blocks, &ubuf->f_blocks) || |
| 248 | __put_user(kbuf->f_bfree, &ubuf->f_bfree) || |
| 249 | __put_user(kbuf->f_bavail, &ubuf->f_bavail) || |
| 250 | __put_user(kbuf->f_files, &ubuf->f_files) || |
| 251 | __put_user(kbuf->f_ffree, &ubuf->f_ffree) || |
| 252 | __put_user(kbuf->f_namelen, &ubuf->f_namelen) || |
| 253 | __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) || |
| 254 | __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) || |
| 255 | __put_user(kbuf->f_frsize, &ubuf->f_frsize) || |
| 256 | __put_user(0, &ubuf->f_spare[0]) || |
| 257 | __put_user(0, &ubuf->f_spare[1]) || |
| 258 | __put_user(0, &ubuf->f_spare[2]) || |
| 259 | __put_user(0, &ubuf->f_spare[3]) || |
| 260 | __put_user(0, &ubuf->f_spare[4])) |
| 261 | return -EFAULT; |
| 262 | return 0; |
| 263 | } |
| 264 | |
| 265 | /* |
| 266 | * The following statfs calls are copies of code from fs/open.c and |
| 267 | * should be checked against those from time to time |
| 268 | */ |
Al Viro | 2d8f303 | 2008-07-22 09:59:21 -0400 | [diff] [blame] | 269 | 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] | 270 | { |
Al Viro | 2d8f303 | 2008-07-22 09:59:21 -0400 | [diff] [blame] | 271 | struct path path; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 272 | int error; |
| 273 | |
Al Viro | 2d8f303 | 2008-07-22 09:59:21 -0400 | [diff] [blame] | 274 | error = user_path(pathname, &path); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 275 | if (!error) { |
| 276 | struct kstatfs tmp; |
Al Viro | 2d8f303 | 2008-07-22 09:59:21 -0400 | [diff] [blame] | 277 | error = vfs_statfs(path.dentry, &tmp); |
David Gibson | 86e07ce | 2005-11-21 21:32:23 -0800 | [diff] [blame] | 278 | if (!error) |
| 279 | error = put_compat_statfs(buf, &tmp); |
Al Viro | 2d8f303 | 2008-07-22 09:59:21 -0400 | [diff] [blame] | 280 | path_put(&path); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 281 | } |
| 282 | return error; |
| 283 | } |
| 284 | |
| 285 | asmlinkage long compat_sys_fstatfs(unsigned int fd, struct compat_statfs __user *buf) |
| 286 | { |
| 287 | struct file * file; |
| 288 | struct kstatfs tmp; |
| 289 | int error; |
| 290 | |
| 291 | error = -EBADF; |
| 292 | file = fget(fd); |
| 293 | if (!file) |
| 294 | goto out; |
Josef "Jeff" Sipek | 0f7fc9e | 2006-12-08 02:36:35 -0800 | [diff] [blame] | 295 | error = vfs_statfs(file->f_path.dentry, &tmp); |
David Gibson | 86e07ce | 2005-11-21 21:32:23 -0800 | [diff] [blame] | 296 | if (!error) |
| 297 | error = put_compat_statfs(buf, &tmp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 298 | fput(file); |
| 299 | out: |
| 300 | return error; |
| 301 | } |
| 302 | |
| 303 | static int put_compat_statfs64(struct compat_statfs64 __user *ubuf, struct kstatfs *kbuf) |
| 304 | { |
| 305 | if (sizeof ubuf->f_blocks == 4) { |
Jon Tollefson | f4a67cc | 2008-07-23 21:27:55 -0700 | [diff] [blame] | 306 | if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail | |
| 307 | kbuf->f_bsize | kbuf->f_frsize) & 0xffffffff00000000ULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 308 | return -EOVERFLOW; |
| 309 | /* f_files and f_ffree may be -1; it's okay |
| 310 | * to stuff that into 32 bits */ |
| 311 | if (kbuf->f_files != 0xffffffffffffffffULL |
| 312 | && (kbuf->f_files & 0xffffffff00000000ULL)) |
| 313 | return -EOVERFLOW; |
| 314 | if (kbuf->f_ffree != 0xffffffffffffffffULL |
| 315 | && (kbuf->f_ffree & 0xffffffff00000000ULL)) |
| 316 | return -EOVERFLOW; |
| 317 | } |
| 318 | if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) || |
| 319 | __put_user(kbuf->f_type, &ubuf->f_type) || |
| 320 | __put_user(kbuf->f_bsize, &ubuf->f_bsize) || |
| 321 | __put_user(kbuf->f_blocks, &ubuf->f_blocks) || |
| 322 | __put_user(kbuf->f_bfree, &ubuf->f_bfree) || |
| 323 | __put_user(kbuf->f_bavail, &ubuf->f_bavail) || |
| 324 | __put_user(kbuf->f_files, &ubuf->f_files) || |
| 325 | __put_user(kbuf->f_ffree, &ubuf->f_ffree) || |
| 326 | __put_user(kbuf->f_namelen, &ubuf->f_namelen) || |
| 327 | __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) || |
| 328 | __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) || |
| 329 | __put_user(kbuf->f_frsize, &ubuf->f_frsize)) |
| 330 | return -EFAULT; |
| 331 | return 0; |
| 332 | } |
| 333 | |
Al Viro | 2d8f303 | 2008-07-22 09:59:21 -0400 | [diff] [blame] | 334 | 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] | 335 | { |
Al Viro | 2d8f303 | 2008-07-22 09:59:21 -0400 | [diff] [blame] | 336 | struct path path; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 337 | int error; |
| 338 | |
| 339 | if (sz != sizeof(*buf)) |
| 340 | return -EINVAL; |
| 341 | |
Al Viro | 2d8f303 | 2008-07-22 09:59:21 -0400 | [diff] [blame] | 342 | error = user_path(pathname, &path); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 343 | if (!error) { |
| 344 | struct kstatfs tmp; |
Al Viro | 2d8f303 | 2008-07-22 09:59:21 -0400 | [diff] [blame] | 345 | error = vfs_statfs(path.dentry, &tmp); |
David Gibson | 86e07ce | 2005-11-21 21:32:23 -0800 | [diff] [blame] | 346 | if (!error) |
| 347 | error = put_compat_statfs64(buf, &tmp); |
Al Viro | 2d8f303 | 2008-07-22 09:59:21 -0400 | [diff] [blame] | 348 | path_put(&path); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 349 | } |
| 350 | return error; |
| 351 | } |
| 352 | |
| 353 | asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz, struct compat_statfs64 __user *buf) |
| 354 | { |
| 355 | struct file * file; |
| 356 | struct kstatfs tmp; |
| 357 | int error; |
| 358 | |
| 359 | if (sz != sizeof(*buf)) |
| 360 | return -EINVAL; |
| 361 | |
| 362 | error = -EBADF; |
| 363 | file = fget(fd); |
| 364 | if (!file) |
| 365 | goto out; |
Josef "Jeff" Sipek | 0f7fc9e | 2006-12-08 02:36:35 -0800 | [diff] [blame] | 366 | error = vfs_statfs(file->f_path.dentry, &tmp); |
David Gibson | 86e07ce | 2005-11-21 21:32:23 -0800 | [diff] [blame] | 367 | if (!error) |
| 368 | error = put_compat_statfs64(buf, &tmp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 369 | fput(file); |
| 370 | out: |
| 371 | return error; |
| 372 | } |
| 373 | |
Christoph Hellwig | 2b1c6bd | 2008-11-28 10:09:09 +0100 | [diff] [blame] | 374 | /* |
| 375 | * This is a copy of sys_ustat, just dealing with a structure layout. |
| 376 | * Given how simple this syscall is that apporach is more maintainable |
| 377 | * than the various conversion hacks. |
| 378 | */ |
| 379 | asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u) |
| 380 | { |
| 381 | struct super_block *sb; |
| 382 | struct compat_ustat tmp; |
| 383 | struct kstatfs sbuf; |
| 384 | int err; |
| 385 | |
| 386 | sb = user_get_super(new_decode_dev(dev)); |
| 387 | if (!sb) |
| 388 | return -EINVAL; |
| 389 | err = vfs_statfs(sb->s_root, &sbuf); |
| 390 | drop_super(sb); |
| 391 | if (err) |
| 392 | return err; |
| 393 | |
| 394 | memset(&tmp, 0, sizeof(struct compat_ustat)); |
| 395 | tmp.f_tfree = sbuf.f_bfree; |
| 396 | tmp.f_tinode = sbuf.f_ffree; |
| 397 | if (copy_to_user(u, &tmp, sizeof(struct compat_ustat))) |
| 398 | return -EFAULT; |
| 399 | return 0; |
| 400 | } |
| 401 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 402 | static int get_compat_flock(struct flock *kfl, struct compat_flock __user *ufl) |
| 403 | { |
| 404 | if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) || |
| 405 | __get_user(kfl->l_type, &ufl->l_type) || |
| 406 | __get_user(kfl->l_whence, &ufl->l_whence) || |
| 407 | __get_user(kfl->l_start, &ufl->l_start) || |
| 408 | __get_user(kfl->l_len, &ufl->l_len) || |
| 409 | __get_user(kfl->l_pid, &ufl->l_pid)) |
| 410 | return -EFAULT; |
| 411 | return 0; |
| 412 | } |
| 413 | |
| 414 | static int put_compat_flock(struct flock *kfl, struct compat_flock __user *ufl) |
| 415 | { |
| 416 | if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) || |
| 417 | __put_user(kfl->l_type, &ufl->l_type) || |
| 418 | __put_user(kfl->l_whence, &ufl->l_whence) || |
| 419 | __put_user(kfl->l_start, &ufl->l_start) || |
| 420 | __put_user(kfl->l_len, &ufl->l_len) || |
| 421 | __put_user(kfl->l_pid, &ufl->l_pid)) |
| 422 | return -EFAULT; |
| 423 | return 0; |
| 424 | } |
| 425 | |
| 426 | #ifndef HAVE_ARCH_GET_COMPAT_FLOCK64 |
| 427 | static int get_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl) |
| 428 | { |
| 429 | if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) || |
| 430 | __get_user(kfl->l_type, &ufl->l_type) || |
| 431 | __get_user(kfl->l_whence, &ufl->l_whence) || |
| 432 | __get_user(kfl->l_start, &ufl->l_start) || |
| 433 | __get_user(kfl->l_len, &ufl->l_len) || |
| 434 | __get_user(kfl->l_pid, &ufl->l_pid)) |
| 435 | return -EFAULT; |
| 436 | return 0; |
| 437 | } |
| 438 | #endif |
| 439 | |
| 440 | #ifndef HAVE_ARCH_PUT_COMPAT_FLOCK64 |
| 441 | static int put_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl) |
| 442 | { |
| 443 | if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) || |
| 444 | __put_user(kfl->l_type, &ufl->l_type) || |
| 445 | __put_user(kfl->l_whence, &ufl->l_whence) || |
| 446 | __put_user(kfl->l_start, &ufl->l_start) || |
| 447 | __put_user(kfl->l_len, &ufl->l_len) || |
| 448 | __put_user(kfl->l_pid, &ufl->l_pid)) |
| 449 | return -EFAULT; |
| 450 | return 0; |
| 451 | } |
| 452 | #endif |
| 453 | |
| 454 | asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd, |
| 455 | unsigned long arg) |
| 456 | { |
| 457 | mm_segment_t old_fs; |
| 458 | struct flock f; |
| 459 | long ret; |
| 460 | |
| 461 | switch (cmd) { |
| 462 | case F_GETLK: |
| 463 | case F_SETLK: |
| 464 | case F_SETLKW: |
| 465 | ret = get_compat_flock(&f, compat_ptr(arg)); |
| 466 | if (ret != 0) |
| 467 | break; |
| 468 | old_fs = get_fs(); |
| 469 | set_fs(KERNEL_DS); |
| 470 | ret = sys_fcntl(fd, cmd, (unsigned long)&f); |
| 471 | set_fs(old_fs); |
| 472 | if (cmd == F_GETLK && ret == 0) { |
Nikanth Karthikesan | ff677f8 | 2009-04-01 14:40:51 +0530 | [diff] [blame] | 473 | /* GETLK was successful and we need to return the data... |
NeilBrown | 2520f14 | 2006-01-08 01:02:40 -0800 | [diff] [blame] | 474 | * but it needs to fit in the compat structure. |
| 475 | * l_start shouldn't be too big, unless the original |
| 476 | * start + end is greater than COMPAT_OFF_T_MAX, in which |
| 477 | * case the app was asking for trouble, so we return |
| 478 | * -EOVERFLOW in that case. |
| 479 | * l_len could be too big, in which case we just truncate it, |
| 480 | * and only allow the app to see that part of the conflicting |
| 481 | * lock that might make sense to it anyway |
| 482 | */ |
| 483 | |
| 484 | if (f.l_start > COMPAT_OFF_T_MAX) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 485 | ret = -EOVERFLOW; |
NeilBrown | 2520f14 | 2006-01-08 01:02:40 -0800 | [diff] [blame] | 486 | if (f.l_len > COMPAT_OFF_T_MAX) |
| 487 | f.l_len = COMPAT_OFF_T_MAX; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 488 | if (ret == 0) |
| 489 | ret = put_compat_flock(&f, compat_ptr(arg)); |
| 490 | } |
| 491 | break; |
| 492 | |
| 493 | case F_GETLK64: |
| 494 | case F_SETLK64: |
| 495 | case F_SETLKW64: |
| 496 | ret = get_compat_flock64(&f, compat_ptr(arg)); |
| 497 | if (ret != 0) |
| 498 | break; |
| 499 | old_fs = get_fs(); |
| 500 | set_fs(KERNEL_DS); |
| 501 | ret = sys_fcntl(fd, (cmd == F_GETLK64) ? F_GETLK : |
| 502 | ((cmd == F_SETLK64) ? F_SETLK : F_SETLKW), |
| 503 | (unsigned long)&f); |
| 504 | set_fs(old_fs); |
| 505 | if (cmd == F_GETLK64 && ret == 0) { |
NeilBrown | 2520f14 | 2006-01-08 01:02:40 -0800 | [diff] [blame] | 506 | /* need to return lock information - see above for commentary */ |
| 507 | if (f.l_start > COMPAT_LOFF_T_MAX) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 508 | ret = -EOVERFLOW; |
NeilBrown | 2520f14 | 2006-01-08 01:02:40 -0800 | [diff] [blame] | 509 | if (f.l_len > COMPAT_LOFF_T_MAX) |
| 510 | f.l_len = COMPAT_LOFF_T_MAX; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 511 | if (ret == 0) |
| 512 | ret = put_compat_flock64(&f, compat_ptr(arg)); |
| 513 | } |
| 514 | break; |
| 515 | |
| 516 | default: |
| 517 | ret = sys_fcntl(fd, cmd, arg); |
| 518 | break; |
| 519 | } |
| 520 | return ret; |
| 521 | } |
| 522 | |
| 523 | asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd, |
| 524 | unsigned long arg) |
| 525 | { |
| 526 | if ((cmd == F_GETLK64) || (cmd == F_SETLK64) || (cmd == F_SETLKW64)) |
| 527 | return -EINVAL; |
| 528 | return compat_sys_fcntl64(fd, cmd, arg); |
| 529 | } |
| 530 | |
| 531 | asmlinkage long |
| 532 | compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p) |
| 533 | { |
| 534 | long ret; |
| 535 | aio_context_t ctx64; |
| 536 | |
| 537 | mm_segment_t oldfs = get_fs(); |
| 538 | if (unlikely(get_user(ctx64, ctx32p))) |
| 539 | return -EFAULT; |
| 540 | |
| 541 | set_fs(KERNEL_DS); |
| 542 | /* The __user pointer cast is valid because of the set_fs() */ |
| 543 | ret = sys_io_setup(nr_reqs, (aio_context_t __user *) &ctx64); |
| 544 | set_fs(oldfs); |
| 545 | /* truncating is ok because it's a user address */ |
| 546 | if (!ret) |
| 547 | ret = put_user((u32) ctx64, ctx32p); |
| 548 | return ret; |
| 549 | } |
| 550 | |
| 551 | asmlinkage long |
| 552 | compat_sys_io_getevents(aio_context_t ctx_id, |
| 553 | unsigned long min_nr, |
| 554 | unsigned long nr, |
| 555 | struct io_event __user *events, |
| 556 | struct compat_timespec __user *timeout) |
| 557 | { |
| 558 | long ret; |
| 559 | struct timespec t; |
| 560 | struct timespec __user *ut = NULL; |
| 561 | |
| 562 | ret = -EFAULT; |
| 563 | if (unlikely(!access_ok(VERIFY_WRITE, events, |
| 564 | nr * sizeof(struct io_event)))) |
| 565 | goto out; |
| 566 | if (timeout) { |
| 567 | if (get_compat_timespec(&t, timeout)) |
| 568 | goto out; |
| 569 | |
| 570 | ut = compat_alloc_user_space(sizeof(*ut)); |
| 571 | if (copy_to_user(ut, &t, sizeof(t)) ) |
| 572 | goto out; |
| 573 | } |
| 574 | ret = sys_io_getevents(ctx_id, min_nr, nr, events, ut); |
| 575 | out: |
| 576 | return ret; |
| 577 | } |
| 578 | |
| 579 | static inline long |
| 580 | copy_iocb(long nr, u32 __user *ptr32, struct iocb __user * __user *ptr64) |
| 581 | { |
| 582 | compat_uptr_t uptr; |
| 583 | int i; |
| 584 | |
| 585 | for (i = 0; i < nr; ++i) { |
| 586 | if (get_user(uptr, ptr32 + i)) |
| 587 | return -EFAULT; |
| 588 | if (put_user(compat_ptr(uptr), ptr64 + i)) |
| 589 | return -EFAULT; |
| 590 | } |
| 591 | return 0; |
| 592 | } |
| 593 | |
| 594 | #define MAX_AIO_SUBMITS (PAGE_SIZE/sizeof(struct iocb *)) |
| 595 | |
| 596 | asmlinkage long |
| 597 | compat_sys_io_submit(aio_context_t ctx_id, int nr, u32 __user *iocb) |
| 598 | { |
| 599 | struct iocb __user * __user *iocb64; |
| 600 | long ret; |
| 601 | |
| 602 | if (unlikely(nr < 0)) |
| 603 | return -EINVAL; |
| 604 | |
| 605 | if (nr > MAX_AIO_SUBMITS) |
| 606 | nr = MAX_AIO_SUBMITS; |
| 607 | |
| 608 | iocb64 = compat_alloc_user_space(nr * sizeof(*iocb64)); |
| 609 | ret = copy_iocb(nr, iocb, iocb64); |
| 610 | if (!ret) |
| 611 | ret = sys_io_submit(ctx_id, nr, iocb64); |
| 612 | return ret; |
| 613 | } |
| 614 | |
| 615 | struct compat_ncp_mount_data { |
| 616 | compat_int_t version; |
| 617 | compat_uint_t ncp_fd; |
Stephen Rothwell | 202e597 | 2005-09-06 15:16:40 -0700 | [diff] [blame] | 618 | __compat_uid_t mounted_uid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 619 | compat_pid_t wdog_pid; |
| 620 | unsigned char mounted_vol[NCP_VOLNAME_LEN + 1]; |
| 621 | compat_uint_t time_out; |
| 622 | compat_uint_t retry_count; |
| 623 | compat_uint_t flags; |
Stephen Rothwell | 202e597 | 2005-09-06 15:16:40 -0700 | [diff] [blame] | 624 | __compat_uid_t uid; |
| 625 | __compat_gid_t gid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 626 | compat_mode_t file_mode; |
| 627 | compat_mode_t dir_mode; |
| 628 | }; |
| 629 | |
| 630 | struct compat_ncp_mount_data_v4 { |
| 631 | compat_int_t version; |
| 632 | compat_ulong_t flags; |
| 633 | compat_ulong_t mounted_uid; |
| 634 | compat_long_t wdog_pid; |
| 635 | compat_uint_t ncp_fd; |
| 636 | compat_uint_t time_out; |
| 637 | compat_uint_t retry_count; |
| 638 | compat_ulong_t uid; |
| 639 | compat_ulong_t gid; |
| 640 | compat_ulong_t file_mode; |
| 641 | compat_ulong_t dir_mode; |
| 642 | }; |
| 643 | |
| 644 | static void *do_ncp_super_data_conv(void *raw_data) |
| 645 | { |
| 646 | int version = *(unsigned int *)raw_data; |
| 647 | |
| 648 | if (version == 3) { |
| 649 | struct compat_ncp_mount_data *c_n = raw_data; |
| 650 | struct ncp_mount_data *n = raw_data; |
| 651 | |
| 652 | n->dir_mode = c_n->dir_mode; |
| 653 | n->file_mode = c_n->file_mode; |
| 654 | n->gid = c_n->gid; |
| 655 | n->uid = c_n->uid; |
| 656 | memmove (n->mounted_vol, c_n->mounted_vol, (sizeof (c_n->mounted_vol) + 3 * sizeof (unsigned int))); |
| 657 | n->wdog_pid = c_n->wdog_pid; |
| 658 | n->mounted_uid = c_n->mounted_uid; |
| 659 | } else if (version == 4) { |
| 660 | struct compat_ncp_mount_data_v4 *c_n = raw_data; |
| 661 | struct ncp_mount_data_v4 *n = raw_data; |
| 662 | |
| 663 | n->dir_mode = c_n->dir_mode; |
| 664 | n->file_mode = c_n->file_mode; |
| 665 | n->gid = c_n->gid; |
| 666 | n->uid = c_n->uid; |
| 667 | n->retry_count = c_n->retry_count; |
| 668 | n->time_out = c_n->time_out; |
| 669 | n->ncp_fd = c_n->ncp_fd; |
| 670 | n->wdog_pid = c_n->wdog_pid; |
| 671 | n->mounted_uid = c_n->mounted_uid; |
| 672 | n->flags = c_n->flags; |
| 673 | } else if (version != 5) { |
| 674 | return NULL; |
| 675 | } |
| 676 | |
| 677 | return raw_data; |
| 678 | } |
| 679 | |
| 680 | struct compat_smb_mount_data { |
| 681 | compat_int_t version; |
Stephen Rothwell | 202e597 | 2005-09-06 15:16:40 -0700 | [diff] [blame] | 682 | __compat_uid_t mounted_uid; |
| 683 | __compat_uid_t uid; |
| 684 | __compat_gid_t gid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 685 | compat_mode_t file_mode; |
| 686 | compat_mode_t dir_mode; |
| 687 | }; |
| 688 | |
| 689 | static void *do_smb_super_data_conv(void *raw_data) |
| 690 | { |
| 691 | struct smb_mount_data *s = raw_data; |
| 692 | struct compat_smb_mount_data *c_s = raw_data; |
| 693 | |
| 694 | if (c_s->version != SMB_MOUNT_OLDVERSION) |
| 695 | goto out; |
| 696 | s->dir_mode = c_s->dir_mode; |
| 697 | s->file_mode = c_s->file_mode; |
| 698 | s->gid = c_s->gid; |
| 699 | s->uid = c_s->uid; |
| 700 | s->mounted_uid = c_s->mounted_uid; |
| 701 | out: |
| 702 | return raw_data; |
| 703 | } |
| 704 | |
David Howells | 9a9947b | 2005-04-18 10:54:51 -0700 | [diff] [blame] | 705 | struct compat_nfs_string { |
| 706 | compat_uint_t len; |
David Howells | 5fc3e62 | 2005-04-27 15:39:03 -0700 | [diff] [blame] | 707 | compat_uptr_t data; |
David Howells | 9a9947b | 2005-04-18 10:54:51 -0700 | [diff] [blame] | 708 | }; |
| 709 | |
| 710 | static inline void compat_nfs_string(struct nfs_string *dst, |
| 711 | struct compat_nfs_string *src) |
| 712 | { |
| 713 | dst->data = compat_ptr(src->data); |
| 714 | dst->len = src->len; |
| 715 | } |
| 716 | |
| 717 | struct compat_nfs4_mount_data_v1 { |
| 718 | compat_int_t version; |
| 719 | compat_int_t flags; |
| 720 | compat_int_t rsize; |
| 721 | compat_int_t wsize; |
| 722 | compat_int_t timeo; |
| 723 | compat_int_t retrans; |
| 724 | compat_int_t acregmin; |
| 725 | compat_int_t acregmax; |
| 726 | compat_int_t acdirmin; |
| 727 | compat_int_t acdirmax; |
| 728 | struct compat_nfs_string client_addr; |
| 729 | struct compat_nfs_string mnt_path; |
| 730 | struct compat_nfs_string hostname; |
| 731 | compat_uint_t host_addrlen; |
David Howells | 5fc3e62 | 2005-04-27 15:39:03 -0700 | [diff] [blame] | 732 | compat_uptr_t host_addr; |
David Howells | 9a9947b | 2005-04-18 10:54:51 -0700 | [diff] [blame] | 733 | compat_int_t proto; |
| 734 | compat_int_t auth_flavourlen; |
David Howells | 5fc3e62 | 2005-04-27 15:39:03 -0700 | [diff] [blame] | 735 | compat_uptr_t auth_flavours; |
David Howells | 9a9947b | 2005-04-18 10:54:51 -0700 | [diff] [blame] | 736 | }; |
| 737 | |
| 738 | static int do_nfs4_super_data_conv(void *raw_data) |
| 739 | { |
| 740 | int version = *(compat_uint_t *) raw_data; |
| 741 | |
| 742 | if (version == 1) { |
| 743 | struct compat_nfs4_mount_data_v1 *raw = raw_data; |
| 744 | struct nfs4_mount_data *real = raw_data; |
| 745 | |
| 746 | /* copy the fields backwards */ |
| 747 | real->auth_flavours = compat_ptr(raw->auth_flavours); |
| 748 | real->auth_flavourlen = raw->auth_flavourlen; |
| 749 | real->proto = raw->proto; |
| 750 | real->host_addr = compat_ptr(raw->host_addr); |
| 751 | real->host_addrlen = raw->host_addrlen; |
| 752 | compat_nfs_string(&real->hostname, &raw->hostname); |
| 753 | compat_nfs_string(&real->mnt_path, &raw->mnt_path); |
| 754 | compat_nfs_string(&real->client_addr, &raw->client_addr); |
| 755 | real->acdirmax = raw->acdirmax; |
| 756 | real->acdirmin = raw->acdirmin; |
| 757 | real->acregmax = raw->acregmax; |
| 758 | real->acregmin = raw->acregmin; |
| 759 | real->retrans = raw->retrans; |
| 760 | real->timeo = raw->timeo; |
| 761 | real->wsize = raw->wsize; |
| 762 | real->rsize = raw->rsize; |
| 763 | real->flags = raw->flags; |
| 764 | real->version = raw->version; |
| 765 | } |
David Howells | 9a9947b | 2005-04-18 10:54:51 -0700 | [diff] [blame] | 766 | |
| 767 | return 0; |
| 768 | } |
| 769 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 770 | #define SMBFS_NAME "smbfs" |
| 771 | #define NCPFS_NAME "ncpfs" |
David Howells | 9a9947b | 2005-04-18 10:54:51 -0700 | [diff] [blame] | 772 | #define NFS4_NAME "nfs4" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 773 | |
| 774 | asmlinkage long compat_sys_mount(char __user * dev_name, char __user * dir_name, |
| 775 | char __user * type, unsigned long flags, |
| 776 | void __user * data) |
| 777 | { |
| 778 | unsigned long type_page; |
| 779 | unsigned long data_page; |
| 780 | unsigned long dev_page; |
| 781 | char *dir_page; |
| 782 | int retval; |
| 783 | |
| 784 | retval = copy_mount_options (type, &type_page); |
| 785 | if (retval < 0) |
| 786 | goto out; |
| 787 | |
| 788 | dir_page = getname(dir_name); |
| 789 | retval = PTR_ERR(dir_page); |
| 790 | if (IS_ERR(dir_page)) |
| 791 | goto out1; |
| 792 | |
| 793 | retval = copy_mount_options (dev_name, &dev_page); |
| 794 | if (retval < 0) |
| 795 | goto out2; |
| 796 | |
| 797 | retval = copy_mount_options (data, &data_page); |
| 798 | if (retval < 0) |
| 799 | goto out3; |
| 800 | |
| 801 | retval = -EINVAL; |
| 802 | |
Andrey Mirkin | 822191a | 2006-12-06 20:31:35 -0800 | [diff] [blame] | 803 | if (type_page && data_page) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 804 | if (!strcmp((char *)type_page, SMBFS_NAME)) { |
| 805 | do_smb_super_data_conv((void *)data_page); |
| 806 | } else if (!strcmp((char *)type_page, NCPFS_NAME)) { |
| 807 | do_ncp_super_data_conv((void *)data_page); |
David Howells | 9a9947b | 2005-04-18 10:54:51 -0700 | [diff] [blame] | 808 | } else if (!strcmp((char *)type_page, NFS4_NAME)) { |
| 809 | if (do_nfs4_super_data_conv((void *) data_page)) |
| 810 | goto out4; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 811 | } |
| 812 | } |
| 813 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 814 | retval = do_mount((char*)dev_page, dir_page, (char*)type_page, |
| 815 | flags, (void*)data_page); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 816 | |
David Howells | 9a9947b | 2005-04-18 10:54:51 -0700 | [diff] [blame] | 817 | out4: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 818 | free_page(data_page); |
| 819 | out3: |
| 820 | free_page(dev_page); |
| 821 | out2: |
| 822 | putname(dir_page); |
| 823 | out1: |
| 824 | free_page(type_page); |
| 825 | out: |
| 826 | return retval; |
| 827 | } |
| 828 | |
| 829 | #define NAME_OFFSET(de) ((int) ((de)->d_name - (char __user *) (de))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 830 | |
| 831 | struct compat_old_linux_dirent { |
| 832 | compat_ulong_t d_ino; |
| 833 | compat_ulong_t d_offset; |
| 834 | unsigned short d_namlen; |
| 835 | char d_name[1]; |
| 836 | }; |
| 837 | |
| 838 | struct compat_readdir_callback { |
| 839 | struct compat_old_linux_dirent __user *dirent; |
| 840 | int result; |
| 841 | }; |
| 842 | |
| 843 | static int compat_fillonedir(void *__buf, const char *name, int namlen, |
David Howells | afefdbb | 2006-10-03 01:13:46 -0700 | [diff] [blame] | 844 | loff_t offset, u64 ino, unsigned int d_type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 845 | { |
| 846 | struct compat_readdir_callback *buf = __buf; |
| 847 | struct compat_old_linux_dirent __user *dirent; |
David Howells | afefdbb | 2006-10-03 01:13:46 -0700 | [diff] [blame] | 848 | compat_ulong_t d_ino; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 849 | |
| 850 | if (buf->result) |
| 851 | return -EINVAL; |
David Howells | afefdbb | 2006-10-03 01:13:46 -0700 | [diff] [blame] | 852 | d_ino = ino; |
Al Viro | 8f3f655 | 2008-08-12 00:28:24 -0400 | [diff] [blame] | 853 | if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) { |
| 854 | buf->result = -EOVERFLOW; |
David Howells | afefdbb | 2006-10-03 01:13:46 -0700 | [diff] [blame] | 855 | return -EOVERFLOW; |
Al Viro | 8f3f655 | 2008-08-12 00:28:24 -0400 | [diff] [blame] | 856 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 857 | buf->result++; |
| 858 | dirent = buf->dirent; |
| 859 | if (!access_ok(VERIFY_WRITE, dirent, |
| 860 | (unsigned long)(dirent->d_name + namlen + 1) - |
| 861 | (unsigned long)dirent)) |
| 862 | goto efault; |
David Howells | afefdbb | 2006-10-03 01:13:46 -0700 | [diff] [blame] | 863 | if ( __put_user(d_ino, &dirent->d_ino) || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 864 | __put_user(offset, &dirent->d_offset) || |
| 865 | __put_user(namlen, &dirent->d_namlen) || |
| 866 | __copy_to_user(dirent->d_name, name, namlen) || |
| 867 | __put_user(0, dirent->d_name + namlen)) |
| 868 | goto efault; |
| 869 | return 0; |
| 870 | efault: |
| 871 | buf->result = -EFAULT; |
| 872 | return -EFAULT; |
| 873 | } |
| 874 | |
| 875 | asmlinkage long compat_sys_old_readdir(unsigned int fd, |
| 876 | struct compat_old_linux_dirent __user *dirent, unsigned int count) |
| 877 | { |
| 878 | int error; |
| 879 | struct file *file; |
| 880 | struct compat_readdir_callback buf; |
| 881 | |
| 882 | error = -EBADF; |
| 883 | file = fget(fd); |
| 884 | if (!file) |
| 885 | goto out; |
| 886 | |
| 887 | buf.result = 0; |
| 888 | buf.dirent = dirent; |
| 889 | |
| 890 | error = vfs_readdir(file, compat_fillonedir, &buf); |
Al Viro | 53c9c5c | 2008-08-24 07:29:52 -0400 | [diff] [blame] | 891 | if (buf.result) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 892 | error = buf.result; |
| 893 | |
| 894 | fput(file); |
| 895 | out: |
| 896 | return error; |
| 897 | } |
| 898 | |
| 899 | struct compat_linux_dirent { |
| 900 | compat_ulong_t d_ino; |
| 901 | compat_ulong_t d_off; |
| 902 | unsigned short d_reclen; |
| 903 | char d_name[1]; |
| 904 | }; |
| 905 | |
| 906 | struct compat_getdents_callback { |
| 907 | struct compat_linux_dirent __user *current_dir; |
| 908 | struct compat_linux_dirent __user *previous; |
| 909 | int count; |
| 910 | int error; |
| 911 | }; |
| 912 | |
| 913 | static int compat_filldir(void *__buf, const char *name, int namlen, |
David Howells | afefdbb | 2006-10-03 01:13:46 -0700 | [diff] [blame] | 914 | loff_t offset, u64 ino, unsigned int d_type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 915 | { |
| 916 | struct compat_linux_dirent __user * dirent; |
| 917 | struct compat_getdents_callback *buf = __buf; |
David Howells | afefdbb | 2006-10-03 01:13:46 -0700 | [diff] [blame] | 918 | compat_ulong_t d_ino; |
Milind Arun Choudhary | 022a169 | 2007-05-08 00:29:02 -0700 | [diff] [blame] | 919 | int reclen = ALIGN(NAME_OFFSET(dirent) + namlen + 2, sizeof(compat_long_t)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 920 | |
| 921 | buf->error = -EINVAL; /* only used if we fail.. */ |
| 922 | if (reclen > buf->count) |
| 923 | return -EINVAL; |
David Howells | afefdbb | 2006-10-03 01:13:46 -0700 | [diff] [blame] | 924 | d_ino = ino; |
Al Viro | 8f3f655 | 2008-08-12 00:28:24 -0400 | [diff] [blame] | 925 | if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) { |
| 926 | buf->error = -EOVERFLOW; |
David Howells | afefdbb | 2006-10-03 01:13:46 -0700 | [diff] [blame] | 927 | return -EOVERFLOW; |
Al Viro | 8f3f655 | 2008-08-12 00:28:24 -0400 | [diff] [blame] | 928 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 929 | dirent = buf->previous; |
| 930 | if (dirent) { |
| 931 | if (__put_user(offset, &dirent->d_off)) |
| 932 | goto efault; |
| 933 | } |
| 934 | dirent = buf->current_dir; |
David Howells | afefdbb | 2006-10-03 01:13:46 -0700 | [diff] [blame] | 935 | if (__put_user(d_ino, &dirent->d_ino)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 936 | goto efault; |
| 937 | if (__put_user(reclen, &dirent->d_reclen)) |
| 938 | goto efault; |
| 939 | if (copy_to_user(dirent->d_name, name, namlen)) |
| 940 | goto efault; |
| 941 | if (__put_user(0, dirent->d_name + namlen)) |
| 942 | goto efault; |
| 943 | if (__put_user(d_type, (char __user *) dirent + reclen - 1)) |
| 944 | goto efault; |
| 945 | buf->previous = dirent; |
| 946 | dirent = (void __user *)dirent + reclen; |
| 947 | buf->current_dir = dirent; |
| 948 | buf->count -= reclen; |
| 949 | return 0; |
| 950 | efault: |
| 951 | buf->error = -EFAULT; |
| 952 | return -EFAULT; |
| 953 | } |
| 954 | |
| 955 | asmlinkage long compat_sys_getdents(unsigned int fd, |
| 956 | struct compat_linux_dirent __user *dirent, unsigned int count) |
| 957 | { |
| 958 | struct file * file; |
| 959 | struct compat_linux_dirent __user * lastdirent; |
| 960 | struct compat_getdents_callback buf; |
| 961 | int error; |
| 962 | |
| 963 | error = -EFAULT; |
| 964 | if (!access_ok(VERIFY_WRITE, dirent, count)) |
| 965 | goto out; |
| 966 | |
| 967 | error = -EBADF; |
| 968 | file = fget(fd); |
| 969 | if (!file) |
| 970 | goto out; |
| 971 | |
| 972 | buf.current_dir = dirent; |
| 973 | buf.previous = NULL; |
| 974 | buf.count = count; |
| 975 | buf.error = 0; |
| 976 | |
| 977 | error = vfs_readdir(file, compat_filldir, &buf); |
Al Viro | 53c9c5c | 2008-08-24 07:29:52 -0400 | [diff] [blame] | 978 | if (error >= 0) |
| 979 | error = buf.error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 980 | lastdirent = buf.previous; |
| 981 | if (lastdirent) { |
| 982 | if (put_user(file->f_pos, &lastdirent->d_off)) |
| 983 | error = -EFAULT; |
| 984 | else |
| 985 | error = count - buf.count; |
| 986 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 987 | fput(file); |
| 988 | out: |
| 989 | return error; |
| 990 | } |
| 991 | |
| 992 | #ifndef __ARCH_OMIT_COMPAT_SYS_GETDENTS64 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 993 | |
| 994 | struct compat_getdents_callback64 { |
| 995 | struct linux_dirent64 __user *current_dir; |
| 996 | struct linux_dirent64 __user *previous; |
| 997 | int count; |
| 998 | int error; |
| 999 | }; |
| 1000 | |
| 1001 | 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] | 1002 | u64 ino, unsigned int d_type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1003 | { |
| 1004 | struct linux_dirent64 __user *dirent; |
| 1005 | struct compat_getdents_callback64 *buf = __buf; |
| 1006 | int jj = NAME_OFFSET(dirent); |
Milind Arun Choudhary | 022a169 | 2007-05-08 00:29:02 -0700 | [diff] [blame] | 1007 | int reclen = ALIGN(jj + namlen + 1, sizeof(u64)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1008 | u64 off; |
| 1009 | |
| 1010 | buf->error = -EINVAL; /* only used if we fail.. */ |
| 1011 | if (reclen > buf->count) |
| 1012 | return -EINVAL; |
| 1013 | dirent = buf->previous; |
| 1014 | |
| 1015 | if (dirent) { |
| 1016 | if (__put_user_unaligned(offset, &dirent->d_off)) |
| 1017 | goto efault; |
| 1018 | } |
| 1019 | dirent = buf->current_dir; |
| 1020 | if (__put_user_unaligned(ino, &dirent->d_ino)) |
| 1021 | goto efault; |
| 1022 | off = 0; |
| 1023 | if (__put_user_unaligned(off, &dirent->d_off)) |
| 1024 | goto efault; |
| 1025 | if (__put_user(reclen, &dirent->d_reclen)) |
| 1026 | goto efault; |
| 1027 | if (__put_user(d_type, &dirent->d_type)) |
| 1028 | goto efault; |
| 1029 | if (copy_to_user(dirent->d_name, name, namlen)) |
| 1030 | goto efault; |
| 1031 | if (__put_user(0, dirent->d_name + namlen)) |
| 1032 | goto efault; |
| 1033 | buf->previous = dirent; |
| 1034 | dirent = (void __user *)dirent + reclen; |
| 1035 | buf->current_dir = dirent; |
| 1036 | buf->count -= reclen; |
| 1037 | return 0; |
| 1038 | efault: |
| 1039 | buf->error = -EFAULT; |
| 1040 | return -EFAULT; |
| 1041 | } |
| 1042 | |
| 1043 | asmlinkage long compat_sys_getdents64(unsigned int fd, |
| 1044 | struct linux_dirent64 __user * dirent, unsigned int count) |
| 1045 | { |
| 1046 | struct file * file; |
| 1047 | struct linux_dirent64 __user * lastdirent; |
| 1048 | struct compat_getdents_callback64 buf; |
| 1049 | int error; |
| 1050 | |
| 1051 | error = -EFAULT; |
| 1052 | if (!access_ok(VERIFY_WRITE, dirent, count)) |
| 1053 | goto out; |
| 1054 | |
| 1055 | error = -EBADF; |
| 1056 | file = fget(fd); |
| 1057 | if (!file) |
| 1058 | goto out; |
| 1059 | |
| 1060 | buf.current_dir = dirent; |
| 1061 | buf.previous = NULL; |
| 1062 | buf.count = count; |
| 1063 | buf.error = 0; |
| 1064 | |
| 1065 | error = vfs_readdir(file, compat_filldir64, &buf); |
Al Viro | 53c9c5c | 2008-08-24 07:29:52 -0400 | [diff] [blame] | 1066 | if (error >= 0) |
| 1067 | error = buf.error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1068 | lastdirent = buf.previous; |
| 1069 | if (lastdirent) { |
| 1070 | typeof(lastdirent->d_off) d_off = file->f_pos; |
Heiko Carstens | 7116e99 | 2006-12-06 20:36:36 -0800 | [diff] [blame] | 1071 | if (__put_user_unaligned(d_off, &lastdirent->d_off)) |
Al Viro | 53c9c5c | 2008-08-24 07:29:52 -0400 | [diff] [blame] | 1072 | error = -EFAULT; |
| 1073 | else |
| 1074 | error = count - buf.count; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1075 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1076 | fput(file); |
| 1077 | out: |
| 1078 | return error; |
| 1079 | } |
| 1080 | #endif /* ! __ARCH_OMIT_COMPAT_SYS_GETDENTS64 */ |
| 1081 | |
| 1082 | static ssize_t compat_do_readv_writev(int type, struct file *file, |
| 1083 | const struct compat_iovec __user *uvector, |
| 1084 | unsigned long nr_segs, loff_t *pos) |
| 1085 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1086 | compat_ssize_t tot_len; |
| 1087 | struct iovec iovstack[UIO_FASTIOV]; |
| 1088 | struct iovec *iov=iovstack, *vector; |
| 1089 | ssize_t ret; |
| 1090 | int seg; |
| 1091 | io_fn_t fn; |
| 1092 | iov_fn_t fnv; |
| 1093 | |
| 1094 | /* |
| 1095 | * SuS says "The readv() function *may* fail if the iovcnt argument |
| 1096 | * was less than or equal to 0, or greater than {IOV_MAX}. Linux has |
| 1097 | * traditionally returned zero for zero segments, so... |
| 1098 | */ |
| 1099 | ret = 0; |
| 1100 | if (nr_segs == 0) |
| 1101 | goto out; |
| 1102 | |
| 1103 | /* |
| 1104 | * First get the "struct iovec" from user memory and |
| 1105 | * verify all the pointers |
| 1106 | */ |
| 1107 | ret = -EINVAL; |
| 1108 | if ((nr_segs > UIO_MAXIOV) || (nr_segs <= 0)) |
| 1109 | goto out; |
| 1110 | if (!file->f_op) |
| 1111 | goto out; |
| 1112 | if (nr_segs > UIO_FASTIOV) { |
| 1113 | ret = -ENOMEM; |
| 1114 | iov = kmalloc(nr_segs*sizeof(struct iovec), GFP_KERNEL); |
| 1115 | if (!iov) |
| 1116 | goto out; |
| 1117 | } |
| 1118 | ret = -EFAULT; |
| 1119 | if (!access_ok(VERIFY_READ, uvector, nr_segs*sizeof(*uvector))) |
| 1120 | goto out; |
| 1121 | |
| 1122 | /* |
| 1123 | * Single unix specification: |
| 1124 | * We should -EINVAL if an element length is not >= 0 and fitting an |
| 1125 | * ssize_t. The total length is fitting an ssize_t |
| 1126 | * |
| 1127 | * Be careful here because iov_len is a size_t not an ssize_t |
| 1128 | */ |
| 1129 | tot_len = 0; |
| 1130 | vector = iov; |
| 1131 | ret = -EINVAL; |
| 1132 | for (seg = 0 ; seg < nr_segs; seg++) { |
| 1133 | compat_ssize_t tmp = tot_len; |
| 1134 | compat_ssize_t len; |
| 1135 | compat_uptr_t buf; |
| 1136 | |
| 1137 | if (__get_user(len, &uvector->iov_len) || |
| 1138 | __get_user(buf, &uvector->iov_base)) { |
| 1139 | ret = -EFAULT; |
| 1140 | goto out; |
| 1141 | } |
| 1142 | if (len < 0) /* size_t not fitting an compat_ssize_t .. */ |
| 1143 | goto out; |
| 1144 | tot_len += len; |
| 1145 | if (tot_len < tmp) /* maths overflow on the compat_ssize_t */ |
| 1146 | goto out; |
| 1147 | vector->iov_base = compat_ptr(buf); |
| 1148 | vector->iov_len = (compat_size_t) len; |
| 1149 | uvector++; |
| 1150 | vector++; |
| 1151 | } |
| 1152 | if (tot_len == 0) { |
| 1153 | ret = 0; |
| 1154 | goto out; |
| 1155 | } |
| 1156 | |
| 1157 | ret = rw_verify_area(type, file, pos, tot_len); |
Linus Torvalds | e28cc71 | 2006-01-04 16:20:40 -0800 | [diff] [blame] | 1158 | if (ret < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1159 | goto out; |
| 1160 | |
| 1161 | fnv = NULL; |
| 1162 | if (type == READ) { |
| 1163 | fn = file->f_op->read; |
Badari Pulavarty | ee0b3e6 | 2006-09-30 23:28:47 -0700 | [diff] [blame] | 1164 | fnv = file->f_op->aio_read; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1165 | } else { |
| 1166 | fn = (io_fn_t)file->f_op->write; |
Badari Pulavarty | ee0b3e6 | 2006-09-30 23:28:47 -0700 | [diff] [blame] | 1167 | fnv = file->f_op->aio_write; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1168 | } |
| 1169 | |
Badari Pulavarty | ee0b3e6 | 2006-09-30 23:28:47 -0700 | [diff] [blame] | 1170 | if (fnv) |
| 1171 | ret = do_sync_readv_writev(file, iov, nr_segs, tot_len, |
| 1172 | pos, fnv); |
| 1173 | else |
| 1174 | ret = do_loop_readv_writev(file, iov, nr_segs, pos, fn); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1175 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1176 | out: |
| 1177 | if (iov != iovstack) |
| 1178 | kfree(iov); |
Robert Love | 0eeca28 | 2005-07-12 17:06:03 -0400 | [diff] [blame] | 1179 | if ((ret + (type == READ)) > 0) { |
Josef "Jeff" Sipek | 0f7fc9e | 2006-12-08 02:36:35 -0800 | [diff] [blame] | 1180 | struct dentry *dentry = file->f_path.dentry; |
Robert Love | 0eeca28 | 2005-07-12 17:06:03 -0400 | [diff] [blame] | 1181 | if (type == READ) |
| 1182 | fsnotify_access(dentry); |
| 1183 | else |
| 1184 | fsnotify_modify(dentry); |
| 1185 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1186 | return ret; |
| 1187 | } |
| 1188 | |
Gerd Hoffmann | dac1213 | 2009-04-02 16:59:20 -0700 | [diff] [blame] | 1189 | static size_t compat_readv(struct file *file, |
| 1190 | const struct compat_iovec __user *vec, |
| 1191 | unsigned long vlen, loff_t *pos) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1192 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1193 | ssize_t ret = -EBADF; |
| 1194 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1195 | if (!(file->f_mode & FMODE_READ)) |
| 1196 | goto out; |
| 1197 | |
| 1198 | ret = -EINVAL; |
Badari Pulavarty | ee0b3e6 | 2006-09-30 23:28:47 -0700 | [diff] [blame] | 1199 | 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] | 1200 | goto out; |
| 1201 | |
Gerd Hoffmann | dac1213 | 2009-04-02 16:59:20 -0700 | [diff] [blame] | 1202 | ret = compat_do_readv_writev(READ, file, vec, vlen, pos); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1203 | |
| 1204 | out: |
Gerd Hoffmann | ca8a5bd | 2009-01-06 14:41:09 -0800 | [diff] [blame] | 1205 | if (ret > 0) |
| 1206 | add_rchar(current, ret); |
| 1207 | inc_syscr(current); |
Gerd Hoffmann | dac1213 | 2009-04-02 16:59:20 -0700 | [diff] [blame] | 1208 | return ret; |
| 1209 | } |
| 1210 | |
| 1211 | asmlinkage ssize_t |
| 1212 | compat_sys_readv(unsigned long fd, const struct compat_iovec __user *vec, |
| 1213 | unsigned long vlen) |
| 1214 | { |
| 1215 | struct file *file; |
Gerd Hoffmann | 10c7db2 | 2009-04-02 16:59:25 -0700 | [diff] [blame] | 1216 | int fput_needed; |
Gerd Hoffmann | dac1213 | 2009-04-02 16:59:20 -0700 | [diff] [blame] | 1217 | ssize_t ret; |
| 1218 | |
Gerd Hoffmann | 10c7db2 | 2009-04-02 16:59:25 -0700 | [diff] [blame] | 1219 | file = fget_light(fd, &fput_needed); |
Gerd Hoffmann | dac1213 | 2009-04-02 16:59:20 -0700 | [diff] [blame] | 1220 | if (!file) |
| 1221 | return -EBADF; |
| 1222 | ret = compat_readv(file, vec, vlen, &file->f_pos); |
Gerd Hoffmann | 10c7db2 | 2009-04-02 16:59:25 -0700 | [diff] [blame] | 1223 | fput_light(file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1224 | return ret; |
| 1225 | } |
| 1226 | |
Gerd Hoffmann | f3554f4 | 2009-04-02 16:59:23 -0700 | [diff] [blame] | 1227 | asmlinkage ssize_t |
| 1228 | compat_sys_preadv(unsigned long fd, const struct compat_iovec __user *vec, |
Linus Torvalds | 601cc11 | 2009-04-03 08:03:22 -0700 | [diff] [blame] | 1229 | unsigned long vlen, u32 pos_low, u32 pos_high) |
Gerd Hoffmann | f3554f4 | 2009-04-02 16:59:23 -0700 | [diff] [blame] | 1230 | { |
| 1231 | loff_t pos = ((loff_t)pos_high << 32) | pos_low; |
| 1232 | struct file *file; |
Gerd Hoffmann | 10c7db2 | 2009-04-02 16:59:25 -0700 | [diff] [blame] | 1233 | int fput_needed; |
Gerd Hoffmann | f3554f4 | 2009-04-02 16:59:23 -0700 | [diff] [blame] | 1234 | ssize_t ret; |
| 1235 | |
| 1236 | if (pos < 0) |
| 1237 | return -EINVAL; |
Gerd Hoffmann | 10c7db2 | 2009-04-02 16:59:25 -0700 | [diff] [blame] | 1238 | file = fget_light(fd, &fput_needed); |
Gerd Hoffmann | f3554f4 | 2009-04-02 16:59:23 -0700 | [diff] [blame] | 1239 | if (!file) |
| 1240 | return -EBADF; |
| 1241 | ret = compat_readv(file, vec, vlen, &pos); |
Gerd Hoffmann | 10c7db2 | 2009-04-02 16:59:25 -0700 | [diff] [blame] | 1242 | fput_light(file, fput_needed); |
Gerd Hoffmann | f3554f4 | 2009-04-02 16:59:23 -0700 | [diff] [blame] | 1243 | return ret; |
| 1244 | } |
| 1245 | |
Gerd Hoffmann | 6949a63 | 2009-04-02 16:59:21 -0700 | [diff] [blame] | 1246 | static size_t compat_writev(struct file *file, |
| 1247 | const struct compat_iovec __user *vec, |
| 1248 | unsigned long vlen, loff_t *pos) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1249 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1250 | ssize_t ret = -EBADF; |
| 1251 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1252 | if (!(file->f_mode & FMODE_WRITE)) |
| 1253 | goto out; |
| 1254 | |
| 1255 | ret = -EINVAL; |
Badari Pulavarty | ee0b3e6 | 2006-09-30 23:28:47 -0700 | [diff] [blame] | 1256 | 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] | 1257 | goto out; |
| 1258 | |
Gerd Hoffmann | 6949a63 | 2009-04-02 16:59:21 -0700 | [diff] [blame] | 1259 | ret = compat_do_readv_writev(WRITE, file, vec, vlen, pos); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1260 | |
| 1261 | out: |
Gerd Hoffmann | ca8a5bd | 2009-01-06 14:41:09 -0800 | [diff] [blame] | 1262 | if (ret > 0) |
| 1263 | add_wchar(current, ret); |
| 1264 | inc_syscw(current); |
Gerd Hoffmann | 6949a63 | 2009-04-02 16:59:21 -0700 | [diff] [blame] | 1265 | return ret; |
| 1266 | } |
| 1267 | |
| 1268 | asmlinkage ssize_t |
| 1269 | compat_sys_writev(unsigned long fd, const struct compat_iovec __user *vec, |
| 1270 | unsigned long vlen) |
| 1271 | { |
| 1272 | struct file *file; |
Gerd Hoffmann | 10c7db2 | 2009-04-02 16:59:25 -0700 | [diff] [blame] | 1273 | int fput_needed; |
Gerd Hoffmann | 6949a63 | 2009-04-02 16:59:21 -0700 | [diff] [blame] | 1274 | ssize_t ret; |
| 1275 | |
Gerd Hoffmann | 10c7db2 | 2009-04-02 16:59:25 -0700 | [diff] [blame] | 1276 | file = fget_light(fd, &fput_needed); |
Gerd Hoffmann | 6949a63 | 2009-04-02 16:59:21 -0700 | [diff] [blame] | 1277 | if (!file) |
| 1278 | return -EBADF; |
| 1279 | ret = compat_writev(file, vec, vlen, &file->f_pos); |
Gerd Hoffmann | 10c7db2 | 2009-04-02 16:59:25 -0700 | [diff] [blame] | 1280 | fput_light(file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1281 | return ret; |
| 1282 | } |
| 1283 | |
Gerd Hoffmann | f3554f4 | 2009-04-02 16:59:23 -0700 | [diff] [blame] | 1284 | asmlinkage ssize_t |
| 1285 | compat_sys_pwritev(unsigned long fd, const struct compat_iovec __user *vec, |
Linus Torvalds | 601cc11 | 2009-04-03 08:03:22 -0700 | [diff] [blame] | 1286 | unsigned long vlen, u32 pos_low, u32 pos_high) |
Gerd Hoffmann | f3554f4 | 2009-04-02 16:59:23 -0700 | [diff] [blame] | 1287 | { |
| 1288 | loff_t pos = ((loff_t)pos_high << 32) | pos_low; |
| 1289 | struct file *file; |
Gerd Hoffmann | 10c7db2 | 2009-04-02 16:59:25 -0700 | [diff] [blame] | 1290 | int fput_needed; |
Gerd Hoffmann | f3554f4 | 2009-04-02 16:59:23 -0700 | [diff] [blame] | 1291 | ssize_t ret; |
| 1292 | |
| 1293 | if (pos < 0) |
| 1294 | return -EINVAL; |
Gerd Hoffmann | 10c7db2 | 2009-04-02 16:59:25 -0700 | [diff] [blame] | 1295 | file = fget_light(fd, &fput_needed); |
Gerd Hoffmann | f3554f4 | 2009-04-02 16:59:23 -0700 | [diff] [blame] | 1296 | if (!file) |
| 1297 | return -EBADF; |
| 1298 | ret = compat_writev(file, vec, vlen, &pos); |
Gerd Hoffmann | 10c7db2 | 2009-04-02 16:59:25 -0700 | [diff] [blame] | 1299 | fput_light(file, fput_needed); |
Gerd Hoffmann | f3554f4 | 2009-04-02 16:59:23 -0700 | [diff] [blame] | 1300 | return ret; |
| 1301 | } |
| 1302 | |
Andi Kleen | d261020 | 2006-05-01 12:15:48 -0700 | [diff] [blame] | 1303 | asmlinkage long |
| 1304 | compat_sys_vmsplice(int fd, const struct compat_iovec __user *iov32, |
| 1305 | unsigned int nr_segs, unsigned int flags) |
| 1306 | { |
| 1307 | unsigned i; |
Al Viro | 90cbad6 | 2006-10-10 22:44:17 +0100 | [diff] [blame] | 1308 | struct iovec __user *iov; |
Jens Axboe | 98232d5 | 2006-05-04 09:13:49 +0200 | [diff] [blame] | 1309 | if (nr_segs > UIO_MAXIOV) |
Andi Kleen | d261020 | 2006-05-01 12:15:48 -0700 | [diff] [blame] | 1310 | return -EINVAL; |
| 1311 | iov = compat_alloc_user_space(nr_segs * sizeof(struct iovec)); |
| 1312 | for (i = 0; i < nr_segs; i++) { |
| 1313 | struct compat_iovec v; |
| 1314 | if (get_user(v.iov_base, &iov32[i].iov_base) || |
| 1315 | get_user(v.iov_len, &iov32[i].iov_len) || |
| 1316 | put_user(compat_ptr(v.iov_base), &iov[i].iov_base) || |
| 1317 | put_user(v.iov_len, &iov[i].iov_len)) |
| 1318 | return -EFAULT; |
| 1319 | } |
| 1320 | return sys_vmsplice(fd, iov, nr_segs, flags); |
| 1321 | } |
| 1322 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1323 | /* |
Miklos Szeredi | e922efc | 2005-09-06 15:18:25 -0700 | [diff] [blame] | 1324 | * Exactly like fs/open.c:sys_open(), except that it doesn't set the |
| 1325 | * O_LARGEFILE flag. |
| 1326 | */ |
| 1327 | asmlinkage long |
| 1328 | compat_sys_open(const char __user *filename, int flags, int mode) |
| 1329 | { |
Ulrich Drepper | 5590ff0 | 2006-01-18 17:43:53 -0800 | [diff] [blame] | 1330 | return do_sys_open(AT_FDCWD, filename, flags, mode); |
| 1331 | } |
| 1332 | |
| 1333 | /* |
| 1334 | * Exactly like fs/open.c:sys_openat(), except that it doesn't set the |
| 1335 | * O_LARGEFILE flag. |
| 1336 | */ |
| 1337 | asmlinkage long |
Stephen Rothwell | 9ad11ab | 2006-02-02 16:11:51 +1100 | [diff] [blame] | 1338 | compat_sys_openat(unsigned int dfd, const char __user *filename, int flags, int mode) |
Ulrich Drepper | 5590ff0 | 2006-01-18 17:43:53 -0800 | [diff] [blame] | 1339 | { |
| 1340 | return do_sys_open(dfd, filename, flags, mode); |
Miklos Szeredi | e922efc | 2005-09-06 15:18:25 -0700 | [diff] [blame] | 1341 | } |
| 1342 | |
| 1343 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1344 | * compat_count() counts the number of arguments/envelopes. It is basically |
| 1345 | * a copy of count() from fs/exec.c, except that it works with 32 bit argv |
| 1346 | * and envp pointers. |
| 1347 | */ |
| 1348 | static int compat_count(compat_uptr_t __user *argv, int max) |
| 1349 | { |
| 1350 | int i = 0; |
| 1351 | |
| 1352 | if (argv != NULL) { |
| 1353 | for (;;) { |
| 1354 | compat_uptr_t p; |
| 1355 | |
| 1356 | if (get_user(p, argv)) |
| 1357 | return -EFAULT; |
| 1358 | if (!p) |
| 1359 | break; |
| 1360 | argv++; |
Jason Baron | 362e666 | 2008-10-15 22:01:52 -0700 | [diff] [blame] | 1361 | if (i++ >= max) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1362 | return -E2BIG; |
| 1363 | } |
| 1364 | } |
| 1365 | return i; |
| 1366 | } |
| 1367 | |
| 1368 | /* |
| 1369 | * compat_copy_strings() is basically a copy of copy_strings() from fs/exec.c |
| 1370 | * except that it works with 32 bit argv and envp pointers. |
| 1371 | */ |
| 1372 | static int compat_copy_strings(int argc, compat_uptr_t __user *argv, |
| 1373 | struct linux_binprm *bprm) |
| 1374 | { |
| 1375 | struct page *kmapped_page = NULL; |
| 1376 | char *kaddr = NULL; |
Ollie Wild | b6a2fea | 2007-07-19 01:48:16 -0700 | [diff] [blame] | 1377 | unsigned long kpos = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1378 | int ret; |
| 1379 | |
| 1380 | while (argc-- > 0) { |
| 1381 | compat_uptr_t str; |
| 1382 | int len; |
| 1383 | unsigned long pos; |
| 1384 | |
| 1385 | if (get_user(str, argv+argc) || |
Ollie Wild | b6a2fea | 2007-07-19 01:48:16 -0700 | [diff] [blame] | 1386 | !(len = strnlen_user(compat_ptr(str), MAX_ARG_STRLEN))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1387 | ret = -EFAULT; |
| 1388 | goto out; |
| 1389 | } |
| 1390 | |
Ollie Wild | b6a2fea | 2007-07-19 01:48:16 -0700 | [diff] [blame] | 1391 | if (len > MAX_ARG_STRLEN) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1392 | ret = -E2BIG; |
| 1393 | goto out; |
| 1394 | } |
| 1395 | |
Ollie Wild | b6a2fea | 2007-07-19 01:48:16 -0700 | [diff] [blame] | 1396 | /* We're going to work our way backwords. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1397 | pos = bprm->p; |
Ollie Wild | b6a2fea | 2007-07-19 01:48:16 -0700 | [diff] [blame] | 1398 | str += len; |
| 1399 | bprm->p -= len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1400 | |
| 1401 | while (len > 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1402 | int offset, bytes_to_copy; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1403 | |
| 1404 | offset = pos % PAGE_SIZE; |
Ollie Wild | b6a2fea | 2007-07-19 01:48:16 -0700 | [diff] [blame] | 1405 | if (offset == 0) |
| 1406 | offset = PAGE_SIZE; |
| 1407 | |
| 1408 | bytes_to_copy = offset; |
| 1409 | if (bytes_to_copy > len) |
| 1410 | bytes_to_copy = len; |
| 1411 | |
| 1412 | offset -= bytes_to_copy; |
| 1413 | pos -= bytes_to_copy; |
| 1414 | str -= bytes_to_copy; |
| 1415 | len -= bytes_to_copy; |
| 1416 | |
| 1417 | if (!kmapped_page || kpos != (pos & PAGE_MASK)) { |
| 1418 | struct page *page; |
| 1419 | |
| 1420 | #ifdef CONFIG_STACK_GROWSUP |
| 1421 | ret = expand_stack_downwards(bprm->vma, pos); |
| 1422 | if (ret < 0) { |
| 1423 | /* We've exceed the stack rlimit. */ |
| 1424 | ret = -E2BIG; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1425 | goto out; |
| 1426 | } |
Ollie Wild | b6a2fea | 2007-07-19 01:48:16 -0700 | [diff] [blame] | 1427 | #endif |
| 1428 | ret = get_user_pages(current, bprm->mm, pos, |
| 1429 | 1, 1, 1, &page, NULL); |
| 1430 | if (ret <= 0) { |
| 1431 | /* We've exceed the stack rlimit. */ |
| 1432 | ret = -E2BIG; |
| 1433 | goto out; |
| 1434 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1435 | |
Ollie Wild | b6a2fea | 2007-07-19 01:48:16 -0700 | [diff] [blame] | 1436 | if (kmapped_page) { |
| 1437 | flush_kernel_dcache_page(kmapped_page); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1438 | kunmap(kmapped_page); |
Ollie Wild | b6a2fea | 2007-07-19 01:48:16 -0700 | [diff] [blame] | 1439 | put_page(kmapped_page); |
| 1440 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1441 | kmapped_page = page; |
| 1442 | kaddr = kmap(kmapped_page); |
Ollie Wild | b6a2fea | 2007-07-19 01:48:16 -0700 | [diff] [blame] | 1443 | kpos = pos & PAGE_MASK; |
| 1444 | flush_cache_page(bprm->vma, kpos, |
| 1445 | page_to_pfn(kmapped_page)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1446 | } |
Ollie Wild | b6a2fea | 2007-07-19 01:48:16 -0700 | [diff] [blame] | 1447 | if (copy_from_user(kaddr+offset, compat_ptr(str), |
| 1448 | bytes_to_copy)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1449 | ret = -EFAULT; |
| 1450 | goto out; |
| 1451 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1452 | } |
| 1453 | } |
| 1454 | ret = 0; |
| 1455 | out: |
Ollie Wild | b6a2fea | 2007-07-19 01:48:16 -0700 | [diff] [blame] | 1456 | if (kmapped_page) { |
| 1457 | flush_kernel_dcache_page(kmapped_page); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1458 | kunmap(kmapped_page); |
Ollie Wild | b6a2fea | 2007-07-19 01:48:16 -0700 | [diff] [blame] | 1459 | put_page(kmapped_page); |
| 1460 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1461 | return ret; |
| 1462 | } |
| 1463 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1464 | /* |
| 1465 | * compat_do_execve() is mostly a copy of do_execve(), with the exception |
| 1466 | * that it processes 32 bit argv and envp pointers. |
| 1467 | */ |
| 1468 | int compat_do_execve(char * filename, |
| 1469 | compat_uptr_t __user *argv, |
| 1470 | compat_uptr_t __user *envp, |
| 1471 | struct pt_regs * regs) |
| 1472 | { |
| 1473 | struct linux_binprm *bprm; |
| 1474 | struct file *file; |
Hugh Dickins | 53e9309 | 2009-03-28 23:16:03 +0000 | [diff] [blame] | 1475 | struct files_struct *displaced; |
Oleg Nesterov | 8c652f9 | 2009-04-24 01:01:56 +0200 | [diff] [blame] | 1476 | bool clear_in_exec; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1477 | int retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1478 | |
Hugh Dickins | 53e9309 | 2009-03-28 23:16:03 +0000 | [diff] [blame] | 1479 | retval = unshare_files(&displaced); |
| 1480 | if (retval) |
| 1481 | goto out_ret; |
| 1482 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1483 | retval = -ENOMEM; |
Oliver Neukum | 11b0b5a | 2006-03-25 03:08:13 -0800 | [diff] [blame] | 1484 | bprm = kzalloc(sizeof(*bprm), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1485 | if (!bprm) |
Hugh Dickins | 53e9309 | 2009-03-28 23:16:03 +0000 | [diff] [blame] | 1486 | goto out_files; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1487 | |
Oleg Nesterov | a2a8474 | 2009-09-05 11:17:13 -0700 | [diff] [blame] | 1488 | retval = prepare_bprm_creds(bprm); |
| 1489 | if (retval) |
David Howells | a6f76f2 | 2008-11-14 10:39:24 +1100 | [diff] [blame] | 1490 | goto out_free; |
Al Viro | 498052b | 2009-03-30 07:20:30 -0400 | [diff] [blame] | 1491 | |
| 1492 | retval = check_unsafe_exec(bprm); |
Oleg Nesterov | 8c652f9 | 2009-04-24 01:01:56 +0200 | [diff] [blame] | 1493 | if (retval < 0) |
Oleg Nesterov | a2a8474 | 2009-09-05 11:17:13 -0700 | [diff] [blame] | 1494 | goto out_free; |
Oleg Nesterov | 8c652f9 | 2009-04-24 01:01:56 +0200 | [diff] [blame] | 1495 | clear_in_exec = retval; |
Oleg Nesterov | a2a8474 | 2009-09-05 11:17:13 -0700 | [diff] [blame] | 1496 | current->in_execve = 1; |
David Howells | a6f76f2 | 2008-11-14 10:39:24 +1100 | [diff] [blame] | 1497 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1498 | file = open_exec(filename); |
| 1499 | retval = PTR_ERR(file); |
| 1500 | if (IS_ERR(file)) |
Al Viro | 498052b | 2009-03-30 07:20:30 -0400 | [diff] [blame] | 1501 | goto out_unmark; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1502 | |
| 1503 | sched_exec(); |
| 1504 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1505 | bprm->file = file; |
| 1506 | bprm->filename = filename; |
| 1507 | bprm->interp = filename; |
Ollie Wild | b6a2fea | 2007-07-19 01:48:16 -0700 | [diff] [blame] | 1508 | |
| 1509 | retval = bprm_mm_init(bprm); |
| 1510 | if (retval) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1511 | goto out_file; |
| 1512 | |
Ollie Wild | b6a2fea | 2007-07-19 01:48:16 -0700 | [diff] [blame] | 1513 | bprm->argc = compat_count(argv, MAX_ARG_STRINGS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1514 | if ((retval = bprm->argc) < 0) |
David Howells | a6f76f2 | 2008-11-14 10:39:24 +1100 | [diff] [blame] | 1515 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1516 | |
Ollie Wild | b6a2fea | 2007-07-19 01:48:16 -0700 | [diff] [blame] | 1517 | bprm->envc = compat_count(envp, MAX_ARG_STRINGS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1518 | if ((retval = bprm->envc) < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1519 | goto out; |
| 1520 | |
| 1521 | retval = prepare_binprm(bprm); |
| 1522 | if (retval < 0) |
| 1523 | goto out; |
| 1524 | |
| 1525 | retval = copy_strings_kernel(1, &bprm->filename, bprm); |
| 1526 | if (retval < 0) |
| 1527 | goto out; |
| 1528 | |
| 1529 | bprm->exec = bprm->p; |
| 1530 | retval = compat_copy_strings(bprm->envc, envp, bprm); |
| 1531 | if (retval < 0) |
| 1532 | goto out; |
| 1533 | |
| 1534 | retval = compat_copy_strings(bprm->argc, argv, bprm); |
| 1535 | if (retval < 0) |
| 1536 | goto out; |
| 1537 | |
| 1538 | retval = search_binary_handler(bprm, regs); |
David Howells | a6f76f2 | 2008-11-14 10:39:24 +1100 | [diff] [blame] | 1539 | if (retval < 0) |
| 1540 | goto out; |
| 1541 | |
| 1542 | /* execve succeeded */ |
Al Viro | 498052b | 2009-03-30 07:20:30 -0400 | [diff] [blame] | 1543 | current->fs->in_exec = 0; |
Kentaro Takeda | f9ce1f1 | 2009-02-05 17:18:11 +0900 | [diff] [blame] | 1544 | current->in_execve = 0; |
David Howells | a6f76f2 | 2008-11-14 10:39:24 +1100 | [diff] [blame] | 1545 | acct_update_integrals(current); |
| 1546 | free_bprm(bprm); |
Hugh Dickins | 53e9309 | 2009-03-28 23:16:03 +0000 | [diff] [blame] | 1547 | if (displaced) |
| 1548 | put_files_struct(displaced); |
David Howells | a6f76f2 | 2008-11-14 10:39:24 +1100 | [diff] [blame] | 1549 | return retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1550 | |
| 1551 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1552 | if (bprm->mm) |
Ollie Wild | b6a2fea | 2007-07-19 01:48:16 -0700 | [diff] [blame] | 1553 | mmput(bprm->mm); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1554 | |
| 1555 | out_file: |
| 1556 | if (bprm->file) { |
| 1557 | allow_write_access(bprm->file); |
| 1558 | fput(bprm->file); |
| 1559 | } |
| 1560 | |
Al Viro | 498052b | 2009-03-30 07:20:30 -0400 | [diff] [blame] | 1561 | out_unmark: |
Oleg Nesterov | 8c652f9 | 2009-04-24 01:01:56 +0200 | [diff] [blame] | 1562 | if (clear_in_exec) |
| 1563 | current->fs->in_exec = 0; |
Kentaro Takeda | f9ce1f1 | 2009-02-05 17:18:11 +0900 | [diff] [blame] | 1564 | current->in_execve = 0; |
David Howells | a6f76f2 | 2008-11-14 10:39:24 +1100 | [diff] [blame] | 1565 | |
| 1566 | out_free: |
Al Viro | 08a6fac | 2008-05-10 16:38:25 -0400 | [diff] [blame] | 1567 | free_bprm(bprm); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1568 | |
Hugh Dickins | 53e9309 | 2009-03-28 23:16:03 +0000 | [diff] [blame] | 1569 | out_files: |
| 1570 | if (displaced) |
| 1571 | reset_files_struct(displaced); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1572 | out_ret: |
| 1573 | return retval; |
| 1574 | } |
| 1575 | |
| 1576 | #define __COMPAT_NFDBITS (8 * sizeof(compat_ulong_t)) |
| 1577 | |
Thomas Gleixner | b773ad4 | 2008-08-31 08:16:57 -0700 | [diff] [blame] | 1578 | static int poll_select_copy_remaining(struct timespec *end_time, void __user *p, |
| 1579 | int timeval, int ret) |
| 1580 | { |
| 1581 | struct timespec ts; |
| 1582 | |
| 1583 | if (!p) |
| 1584 | return ret; |
| 1585 | |
| 1586 | if (current->personality & STICKY_TIMEOUTS) |
| 1587 | goto sticky; |
| 1588 | |
| 1589 | /* No update for zero timeout */ |
| 1590 | if (!end_time->tv_sec && !end_time->tv_nsec) |
| 1591 | return ret; |
| 1592 | |
| 1593 | ktime_get_ts(&ts); |
| 1594 | ts = timespec_sub(*end_time, ts); |
| 1595 | if (ts.tv_sec < 0) |
| 1596 | ts.tv_sec = ts.tv_nsec = 0; |
| 1597 | |
| 1598 | if (timeval) { |
| 1599 | struct compat_timeval rtv; |
| 1600 | |
| 1601 | rtv.tv_sec = ts.tv_sec; |
| 1602 | rtv.tv_usec = ts.tv_nsec / NSEC_PER_USEC; |
| 1603 | |
| 1604 | if (!copy_to_user(p, &rtv, sizeof(rtv))) |
| 1605 | return ret; |
| 1606 | } else { |
| 1607 | struct compat_timespec rts; |
| 1608 | |
| 1609 | rts.tv_sec = ts.tv_sec; |
| 1610 | rts.tv_nsec = ts.tv_nsec; |
| 1611 | |
| 1612 | if (!copy_to_user(p, &rts, sizeof(rts))) |
| 1613 | return ret; |
| 1614 | } |
| 1615 | /* |
| 1616 | * If an application puts its timeval in read-only memory, we |
| 1617 | * don't want the Linux-specific update to the timeval to |
| 1618 | * cause a fault after the select has completed |
| 1619 | * successfully. However, because we're not updating the |
| 1620 | * timeval, we can't restart the system call. |
| 1621 | */ |
| 1622 | |
| 1623 | sticky: |
| 1624 | if (ret == -ERESTARTNOHAND) |
| 1625 | ret = -EINTR; |
| 1626 | return ret; |
| 1627 | } |
| 1628 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1629 | /* |
| 1630 | * Ooo, nasty. We need here to frob 32-bit unsigned longs to |
| 1631 | * 64-bit unsigned longs. |
| 1632 | */ |
Arjan van de Ven | 858119e | 2006-01-14 13:20:43 -0800 | [diff] [blame] | 1633 | static |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1634 | int compat_get_fd_set(unsigned long nr, compat_ulong_t __user *ufdset, |
| 1635 | unsigned long *fdset) |
| 1636 | { |
Milind Arun Choudhary | 022a169 | 2007-05-08 00:29:02 -0700 | [diff] [blame] | 1637 | nr = DIV_ROUND_UP(nr, __COMPAT_NFDBITS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1638 | if (ufdset) { |
| 1639 | unsigned long odd; |
| 1640 | |
| 1641 | if (!access_ok(VERIFY_WRITE, ufdset, nr*sizeof(compat_ulong_t))) |
| 1642 | return -EFAULT; |
| 1643 | |
| 1644 | odd = nr & 1UL; |
| 1645 | nr &= ~1UL; |
| 1646 | while (nr) { |
| 1647 | unsigned long h, l; |
Heiko Carstens | 7116e99 | 2006-12-06 20:36:36 -0800 | [diff] [blame] | 1648 | if (__get_user(l, ufdset) || __get_user(h, ufdset+1)) |
| 1649 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1650 | ufdset += 2; |
| 1651 | *fdset++ = h << 32 | l; |
| 1652 | nr -= 2; |
| 1653 | } |
Heiko Carstens | 7116e99 | 2006-12-06 20:36:36 -0800 | [diff] [blame] | 1654 | if (odd && __get_user(*fdset, ufdset)) |
| 1655 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1656 | } else { |
| 1657 | /* Tricky, must clear full unsigned long in the |
| 1658 | * kernel fdset at the end, this makes sure that |
| 1659 | * actually happens. |
| 1660 | */ |
| 1661 | memset(fdset, 0, ((nr + 1) & ~1)*sizeof(compat_ulong_t)); |
| 1662 | } |
| 1663 | return 0; |
| 1664 | } |
| 1665 | |
Arjan van de Ven | 858119e | 2006-01-14 13:20:43 -0800 | [diff] [blame] | 1666 | static |
Heiko Carstens | 7116e99 | 2006-12-06 20:36:36 -0800 | [diff] [blame] | 1667 | int compat_set_fd_set(unsigned long nr, compat_ulong_t __user *ufdset, |
| 1668 | unsigned long *fdset) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1669 | { |
| 1670 | unsigned long odd; |
Milind Arun Choudhary | 022a169 | 2007-05-08 00:29:02 -0700 | [diff] [blame] | 1671 | nr = DIV_ROUND_UP(nr, __COMPAT_NFDBITS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1672 | |
| 1673 | if (!ufdset) |
Heiko Carstens | 7116e99 | 2006-12-06 20:36:36 -0800 | [diff] [blame] | 1674 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1675 | |
| 1676 | odd = nr & 1UL; |
| 1677 | nr &= ~1UL; |
| 1678 | while (nr) { |
| 1679 | unsigned long h, l; |
| 1680 | l = *fdset++; |
| 1681 | h = l >> 32; |
Heiko Carstens | 7116e99 | 2006-12-06 20:36:36 -0800 | [diff] [blame] | 1682 | if (__put_user(l, ufdset) || __put_user(h, ufdset+1)) |
| 1683 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1684 | ufdset += 2; |
| 1685 | nr -= 2; |
| 1686 | } |
Heiko Carstens | 7116e99 | 2006-12-06 20:36:36 -0800 | [diff] [blame] | 1687 | if (odd && __put_user(*fdset, ufdset)) |
| 1688 | return -EFAULT; |
| 1689 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1690 | } |
| 1691 | |
| 1692 | |
| 1693 | /* |
| 1694 | * This is a virtual copy of sys_select from fs/select.c and probably |
| 1695 | * should be compared to it from time to time |
| 1696 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1697 | |
| 1698 | /* |
| 1699 | * We can actually return ERESTARTSYS instead of EINTR, but I'd |
| 1700 | * like to be certain this leads to no problems. So I return |
| 1701 | * EINTR just for safety. |
| 1702 | * |
| 1703 | * Update: ERESTARTSYS breaks at least the xview clock binary, so |
| 1704 | * I'm trying ERESTARTNOHAND which restart only when you want to. |
| 1705 | */ |
| 1706 | #define MAX_SELECT_SECONDS \ |
| 1707 | ((unsigned long) (MAX_SCHEDULE_TIMEOUT / HZ)-1) |
| 1708 | |
David Woodhouse | 9f72949 | 2006-01-18 17:44:05 -0800 | [diff] [blame] | 1709 | 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] | 1710 | compat_ulong_t __user *outp, compat_ulong_t __user *exp, |
| 1711 | struct timespec *end_time) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1712 | { |
| 1713 | fd_set_bits fds; |
Badari Pulavarty | 6087b2d | 2007-05-23 13:57:45 -0700 | [diff] [blame] | 1714 | void *bits; |
Vadim Lobanov | bbea9f6 | 2006-12-10 02:21:12 -0800 | [diff] [blame] | 1715 | int size, max_fds, ret = -EINVAL; |
Linus Torvalds | a4531ed | 2005-09-09 15:10:52 -0700 | [diff] [blame] | 1716 | struct fdtable *fdt; |
Badari Pulavarty | 6087b2d | 2007-05-23 13:57:45 -0700 | [diff] [blame] | 1717 | long stack_fds[SELECT_STACK_ALLOC/sizeof(long)]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1718 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1719 | if (n < 0) |
| 1720 | goto out_nofds; |
| 1721 | |
Vadim Lobanov | bbea9f6 | 2006-12-10 02:21:12 -0800 | [diff] [blame] | 1722 | /* max_fds can increase, so grab it once to avoid race */ |
Linus Torvalds | ac5b8b6 | 2005-09-09 15:42:34 -0700 | [diff] [blame] | 1723 | rcu_read_lock(); |
Linus Torvalds | a4531ed | 2005-09-09 15:10:52 -0700 | [diff] [blame] | 1724 | fdt = files_fdtable(current->files); |
Vadim Lobanov | bbea9f6 | 2006-12-10 02:21:12 -0800 | [diff] [blame] | 1725 | max_fds = fdt->max_fds; |
Linus Torvalds | ac5b8b6 | 2005-09-09 15:42:34 -0700 | [diff] [blame] | 1726 | rcu_read_unlock(); |
Vadim Lobanov | bbea9f6 | 2006-12-10 02:21:12 -0800 | [diff] [blame] | 1727 | if (n > max_fds) |
| 1728 | n = max_fds; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1729 | |
| 1730 | /* |
| 1731 | * We need 6 bitmaps (in/out/ex for both incoming and outgoing), |
| 1732 | * since we used fdset we need to allocate memory in units of |
| 1733 | * long-words. |
| 1734 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1735 | size = FDS_BYTES(n); |
Badari Pulavarty | 6087b2d | 2007-05-23 13:57:45 -0700 | [diff] [blame] | 1736 | bits = stack_fds; |
| 1737 | if (size > sizeof(stack_fds) / 6) { |
| 1738 | bits = kmalloc(6 * size, GFP_KERNEL); |
| 1739 | ret = -ENOMEM; |
| 1740 | if (!bits) |
| 1741 | goto out_nofds; |
| 1742 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1743 | fds.in = (unsigned long *) bits; |
| 1744 | fds.out = (unsigned long *) (bits + size); |
| 1745 | fds.ex = (unsigned long *) (bits + 2*size); |
| 1746 | fds.res_in = (unsigned long *) (bits + 3*size); |
| 1747 | fds.res_out = (unsigned long *) (bits + 4*size); |
| 1748 | fds.res_ex = (unsigned long *) (bits + 5*size); |
| 1749 | |
| 1750 | if ((ret = compat_get_fd_set(n, inp, fds.in)) || |
| 1751 | (ret = compat_get_fd_set(n, outp, fds.out)) || |
| 1752 | (ret = compat_get_fd_set(n, exp, fds.ex))) |
| 1753 | goto out; |
| 1754 | zero_fd_set(n, fds.res_in); |
| 1755 | zero_fd_set(n, fds.res_out); |
| 1756 | zero_fd_set(n, fds.res_ex); |
| 1757 | |
Arjan van de Ven | 8ff3e8e | 2008-08-31 08:26:40 -0700 | [diff] [blame] | 1758 | ret = do_select(n, &fds, end_time); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1759 | |
| 1760 | if (ret < 0) |
| 1761 | goto out; |
| 1762 | if (!ret) { |
| 1763 | ret = -ERESTARTNOHAND; |
| 1764 | if (signal_pending(current)) |
| 1765 | goto out; |
| 1766 | ret = 0; |
| 1767 | } |
| 1768 | |
Heiko Carstens | 7116e99 | 2006-12-06 20:36:36 -0800 | [diff] [blame] | 1769 | if (compat_set_fd_set(n, inp, fds.res_in) || |
| 1770 | compat_set_fd_set(n, outp, fds.res_out) || |
| 1771 | compat_set_fd_set(n, exp, fds.res_ex)) |
| 1772 | ret = -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1773 | out: |
Badari Pulavarty | 6087b2d | 2007-05-23 13:57:45 -0700 | [diff] [blame] | 1774 | if (bits != stack_fds) |
| 1775 | kfree(bits); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1776 | out_nofds: |
| 1777 | return ret; |
| 1778 | } |
| 1779 | |
David Woodhouse | 9f72949 | 2006-01-18 17:44:05 -0800 | [diff] [blame] | 1780 | asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp, |
| 1781 | compat_ulong_t __user *outp, compat_ulong_t __user *exp, |
| 1782 | struct compat_timeval __user *tvp) |
| 1783 | { |
Arjan van de Ven | 8ff3e8e | 2008-08-31 08:26:40 -0700 | [diff] [blame] | 1784 | struct timespec end_time, *to = NULL; |
David Woodhouse | 9f72949 | 2006-01-18 17:44:05 -0800 | [diff] [blame] | 1785 | struct compat_timeval tv; |
| 1786 | int ret; |
| 1787 | |
| 1788 | if (tvp) { |
| 1789 | if (copy_from_user(&tv, tvp, sizeof(tv))) |
| 1790 | return -EFAULT; |
| 1791 | |
Arjan van de Ven | 8ff3e8e | 2008-08-31 08:26:40 -0700 | [diff] [blame] | 1792 | to = &end_time; |
Arjan van de Ven | 4d36a9e | 2008-10-25 12:41:41 -0700 | [diff] [blame] | 1793 | if (poll_select_set_timeout(to, |
| 1794 | tv.tv_sec + (tv.tv_usec / USEC_PER_SEC), |
| 1795 | (tv.tv_usec % USEC_PER_SEC) * NSEC_PER_USEC)) |
David Woodhouse | 9f72949 | 2006-01-18 17:44:05 -0800 | [diff] [blame] | 1796 | return -EINVAL; |
David Woodhouse | 9f72949 | 2006-01-18 17:44:05 -0800 | [diff] [blame] | 1797 | } |
| 1798 | |
Arjan van de Ven | 8ff3e8e | 2008-08-31 08:26:40 -0700 | [diff] [blame] | 1799 | ret = compat_core_sys_select(n, inp, outp, exp, to); |
| 1800 | ret = poll_select_copy_remaining(&end_time, tvp, 1, ret); |
David Woodhouse | 9f72949 | 2006-01-18 17:44:05 -0800 | [diff] [blame] | 1801 | |
| 1802 | return ret; |
| 1803 | } |
| 1804 | |
Roland McGrath | f3de272 | 2008-04-30 00:53:09 -0700 | [diff] [blame] | 1805 | #ifdef HAVE_SET_RESTORE_SIGMASK |
Heiko Carstens | c9da9f2 | 2009-01-14 14:13:57 +0100 | [diff] [blame] | 1806 | static long do_compat_pselect(int n, compat_ulong_t __user *inp, |
David Woodhouse | 9f72949 | 2006-01-18 17:44:05 -0800 | [diff] [blame] | 1807 | compat_ulong_t __user *outp, compat_ulong_t __user *exp, |
| 1808 | struct compat_timespec __user *tsp, compat_sigset_t __user *sigmask, |
| 1809 | compat_size_t sigsetsize) |
| 1810 | { |
| 1811 | compat_sigset_t ss32; |
| 1812 | sigset_t ksigmask, sigsaved; |
David Woodhouse | 9f72949 | 2006-01-18 17:44:05 -0800 | [diff] [blame] | 1813 | struct compat_timespec ts; |
Arjan van de Ven | 8ff3e8e | 2008-08-31 08:26:40 -0700 | [diff] [blame] | 1814 | struct timespec end_time, *to = NULL; |
David Woodhouse | 9f72949 | 2006-01-18 17:44:05 -0800 | [diff] [blame] | 1815 | int ret; |
| 1816 | |
| 1817 | if (tsp) { |
| 1818 | if (copy_from_user(&ts, tsp, sizeof(ts))) |
| 1819 | return -EFAULT; |
| 1820 | |
Arjan van de Ven | 8ff3e8e | 2008-08-31 08:26:40 -0700 | [diff] [blame] | 1821 | to = &end_time; |
| 1822 | if (poll_select_set_timeout(to, ts.tv_sec, ts.tv_nsec)) |
David Woodhouse | 9f72949 | 2006-01-18 17:44:05 -0800 | [diff] [blame] | 1823 | return -EINVAL; |
| 1824 | } |
| 1825 | |
| 1826 | if (sigmask) { |
| 1827 | if (sigsetsize != sizeof(compat_sigset_t)) |
| 1828 | return -EINVAL; |
| 1829 | if (copy_from_user(&ss32, sigmask, sizeof(ss32))) |
| 1830 | return -EFAULT; |
| 1831 | sigset_from_compat(&ksigmask, &ss32); |
| 1832 | |
| 1833 | sigdelsetmask(&ksigmask, sigmask(SIGKILL)|sigmask(SIGSTOP)); |
| 1834 | sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved); |
| 1835 | } |
| 1836 | |
Arjan van de Ven | 8ff3e8e | 2008-08-31 08:26:40 -0700 | [diff] [blame] | 1837 | ret = compat_core_sys_select(n, inp, outp, exp, to); |
| 1838 | ret = poll_select_copy_remaining(&end_time, tsp, 0, ret); |
David Woodhouse | 9f72949 | 2006-01-18 17:44:05 -0800 | [diff] [blame] | 1839 | |
| 1840 | if (ret == -ERESTARTNOHAND) { |
| 1841 | /* |
| 1842 | * Don't restore the signal mask yet. Let do_signal() deliver |
| 1843 | * the signal on the way back to userspace, before the signal |
| 1844 | * mask is restored. |
| 1845 | */ |
| 1846 | if (sigmask) { |
| 1847 | memcpy(¤t->saved_sigmask, &sigsaved, |
| 1848 | sizeof(sigsaved)); |
Roland McGrath | 4e4c22c | 2008-04-30 00:53:06 -0700 | [diff] [blame] | 1849 | set_restore_sigmask(); |
David Woodhouse | 9f72949 | 2006-01-18 17:44:05 -0800 | [diff] [blame] | 1850 | } |
| 1851 | } else if (sigmask) |
| 1852 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); |
| 1853 | |
| 1854 | return ret; |
| 1855 | } |
| 1856 | |
| 1857 | asmlinkage long compat_sys_pselect6(int n, compat_ulong_t __user *inp, |
| 1858 | compat_ulong_t __user *outp, compat_ulong_t __user *exp, |
| 1859 | struct compat_timespec __user *tsp, void __user *sig) |
| 1860 | { |
| 1861 | compat_size_t sigsetsize = 0; |
| 1862 | compat_uptr_t up = 0; |
| 1863 | |
| 1864 | if (sig) { |
| 1865 | if (!access_ok(VERIFY_READ, sig, |
| 1866 | sizeof(compat_uptr_t)+sizeof(compat_size_t)) || |
| 1867 | __get_user(up, (compat_uptr_t __user *)sig) || |
| 1868 | __get_user(sigsetsize, |
| 1869 | (compat_size_t __user *)(sig+sizeof(up)))) |
| 1870 | return -EFAULT; |
| 1871 | } |
Heiko Carstens | c9da9f2 | 2009-01-14 14:13:57 +0100 | [diff] [blame] | 1872 | return do_compat_pselect(n, inp, outp, exp, tsp, compat_ptr(up), |
| 1873 | sigsetsize); |
David Woodhouse | 9f72949 | 2006-01-18 17:44:05 -0800 | [diff] [blame] | 1874 | } |
| 1875 | |
| 1876 | asmlinkage long compat_sys_ppoll(struct pollfd __user *ufds, |
| 1877 | unsigned int nfds, struct compat_timespec __user *tsp, |
| 1878 | const compat_sigset_t __user *sigmask, compat_size_t sigsetsize) |
| 1879 | { |
| 1880 | compat_sigset_t ss32; |
| 1881 | sigset_t ksigmask, sigsaved; |
| 1882 | struct compat_timespec ts; |
Arjan van de Ven | 8ff3e8e | 2008-08-31 08:26:40 -0700 | [diff] [blame] | 1883 | struct timespec end_time, *to = NULL; |
David Woodhouse | 9f72949 | 2006-01-18 17:44:05 -0800 | [diff] [blame] | 1884 | int ret; |
| 1885 | |
| 1886 | if (tsp) { |
| 1887 | if (copy_from_user(&ts, tsp, sizeof(ts))) |
| 1888 | return -EFAULT; |
| 1889 | |
Arjan van de Ven | 8ff3e8e | 2008-08-31 08:26:40 -0700 | [diff] [blame] | 1890 | to = &end_time; |
| 1891 | if (poll_select_set_timeout(to, ts.tv_sec, ts.tv_nsec)) |
| 1892 | return -EINVAL; |
David Woodhouse | 9f72949 | 2006-01-18 17:44:05 -0800 | [diff] [blame] | 1893 | } |
| 1894 | |
| 1895 | if (sigmask) { |
Alexey Dobriyan | 3835a9b | 2006-05-15 09:44:27 -0700 | [diff] [blame] | 1896 | if (sigsetsize != sizeof(compat_sigset_t)) |
David Woodhouse | 9f72949 | 2006-01-18 17:44:05 -0800 | [diff] [blame] | 1897 | return -EINVAL; |
| 1898 | if (copy_from_user(&ss32, sigmask, sizeof(ss32))) |
| 1899 | return -EFAULT; |
| 1900 | sigset_from_compat(&ksigmask, &ss32); |
| 1901 | |
| 1902 | sigdelsetmask(&ksigmask, sigmask(SIGKILL)|sigmask(SIGSTOP)); |
| 1903 | sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved); |
| 1904 | } |
| 1905 | |
Arjan van de Ven | 8ff3e8e | 2008-08-31 08:26:40 -0700 | [diff] [blame] | 1906 | ret = do_sys_poll(ufds, nfds, to); |
David Woodhouse | 9f72949 | 2006-01-18 17:44:05 -0800 | [diff] [blame] | 1907 | |
| 1908 | /* We can restart this syscall, usually */ |
| 1909 | if (ret == -EINTR) { |
| 1910 | /* |
| 1911 | * Don't restore the signal mask yet. Let do_signal() deliver |
| 1912 | * the signal on the way back to userspace, before the signal |
| 1913 | * mask is restored. |
| 1914 | */ |
| 1915 | if (sigmask) { |
| 1916 | memcpy(¤t->saved_sigmask, &sigsaved, |
| 1917 | sizeof(sigsaved)); |
Roland McGrath | 4e4c22c | 2008-04-30 00:53:06 -0700 | [diff] [blame] | 1918 | set_restore_sigmask(); |
David Woodhouse | 9f72949 | 2006-01-18 17:44:05 -0800 | [diff] [blame] | 1919 | } |
| 1920 | ret = -ERESTARTNOHAND; |
| 1921 | } else if (sigmask) |
| 1922 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); |
| 1923 | |
Arjan van de Ven | 8ff3e8e | 2008-08-31 08:26:40 -0700 | [diff] [blame] | 1924 | ret = poll_select_copy_remaining(&end_time, tsp, 0, ret); |
David Woodhouse | 9f72949 | 2006-01-18 17:44:05 -0800 | [diff] [blame] | 1925 | |
| 1926 | return ret; |
| 1927 | } |
Roland McGrath | f3de272 | 2008-04-30 00:53:09 -0700 | [diff] [blame] | 1928 | #endif /* HAVE_SET_RESTORE_SIGMASK */ |
David Woodhouse | 9f72949 | 2006-01-18 17:44:05 -0800 | [diff] [blame] | 1929 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1930 | #if defined(CONFIG_NFSD) || defined(CONFIG_NFSD_MODULE) |
| 1931 | /* Stuff for NFS server syscalls... */ |
| 1932 | struct compat_nfsctl_svc { |
| 1933 | u16 svc32_port; |
| 1934 | s32 svc32_nthreads; |
| 1935 | }; |
| 1936 | |
| 1937 | struct compat_nfsctl_client { |
| 1938 | s8 cl32_ident[NFSCLNT_IDMAX+1]; |
| 1939 | s32 cl32_naddr; |
| 1940 | struct in_addr cl32_addrlist[NFSCLNT_ADDRMAX]; |
| 1941 | s32 cl32_fhkeytype; |
| 1942 | s32 cl32_fhkeylen; |
| 1943 | u8 cl32_fhkey[NFSCLNT_KEYMAX]; |
| 1944 | }; |
| 1945 | |
| 1946 | struct compat_nfsctl_export { |
| 1947 | char ex32_client[NFSCLNT_IDMAX+1]; |
| 1948 | char ex32_path[NFS_MAXPATHLEN+1]; |
| 1949 | compat_dev_t ex32_dev; |
| 1950 | compat_ino_t ex32_ino; |
| 1951 | compat_int_t ex32_flags; |
Stephen Rothwell | 202e597 | 2005-09-06 15:16:40 -0700 | [diff] [blame] | 1952 | __compat_uid_t ex32_anon_uid; |
| 1953 | __compat_gid_t ex32_anon_gid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1954 | }; |
| 1955 | |
| 1956 | struct compat_nfsctl_fdparm { |
| 1957 | struct sockaddr gd32_addr; |
| 1958 | s8 gd32_path[NFS_MAXPATHLEN+1]; |
| 1959 | compat_int_t gd32_version; |
| 1960 | }; |
| 1961 | |
| 1962 | struct compat_nfsctl_fsparm { |
| 1963 | struct sockaddr gd32_addr; |
| 1964 | s8 gd32_path[NFS_MAXPATHLEN+1]; |
| 1965 | compat_int_t gd32_maxlen; |
| 1966 | }; |
| 1967 | |
| 1968 | struct compat_nfsctl_arg { |
| 1969 | compat_int_t ca32_version; /* safeguard */ |
| 1970 | union { |
| 1971 | struct compat_nfsctl_svc u32_svc; |
| 1972 | struct compat_nfsctl_client u32_client; |
| 1973 | struct compat_nfsctl_export u32_export; |
| 1974 | struct compat_nfsctl_fdparm u32_getfd; |
| 1975 | struct compat_nfsctl_fsparm u32_getfs; |
| 1976 | } u; |
| 1977 | #define ca32_svc u.u32_svc |
| 1978 | #define ca32_client u.u32_client |
| 1979 | #define ca32_export u.u32_export |
| 1980 | #define ca32_getfd u.u32_getfd |
| 1981 | #define ca32_getfs u.u32_getfs |
| 1982 | }; |
| 1983 | |
| 1984 | union compat_nfsctl_res { |
| 1985 | __u8 cr32_getfh[NFS_FHSIZE]; |
| 1986 | struct knfsd_fh cr32_getfs; |
| 1987 | }; |
| 1988 | |
Lin Feng Shen | d64b1c8 | 2006-05-20 14:59:49 -0700 | [diff] [blame] | 1989 | static int compat_nfs_svc_trans(struct nfsctl_arg *karg, |
| 1990 | struct compat_nfsctl_arg __user *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1991 | { |
Lin Feng Shen | d64b1c8 | 2006-05-20 14:59:49 -0700 | [diff] [blame] | 1992 | if (!access_ok(VERIFY_READ, &arg->ca32_svc, sizeof(arg->ca32_svc)) || |
| 1993 | get_user(karg->ca_version, &arg->ca32_version) || |
| 1994 | __get_user(karg->ca_svc.svc_port, &arg->ca32_svc.svc32_port) || |
| 1995 | __get_user(karg->ca_svc.svc_nthreads, |
| 1996 | &arg->ca32_svc.svc32_nthreads)) |
| 1997 | return -EFAULT; |
| 1998 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1999 | } |
| 2000 | |
Lin Feng Shen | d64b1c8 | 2006-05-20 14:59:49 -0700 | [diff] [blame] | 2001 | static int compat_nfs_clnt_trans(struct nfsctl_arg *karg, |
| 2002 | struct compat_nfsctl_arg __user *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2003 | { |
Lin Feng Shen | d64b1c8 | 2006-05-20 14:59:49 -0700 | [diff] [blame] | 2004 | if (!access_ok(VERIFY_READ, &arg->ca32_client, |
| 2005 | sizeof(arg->ca32_client)) || |
| 2006 | get_user(karg->ca_version, &arg->ca32_version) || |
| 2007 | __copy_from_user(&karg->ca_client.cl_ident[0], |
| 2008 | &arg->ca32_client.cl32_ident[0], |
| 2009 | NFSCLNT_IDMAX) || |
| 2010 | __get_user(karg->ca_client.cl_naddr, |
| 2011 | &arg->ca32_client.cl32_naddr) || |
| 2012 | __copy_from_user(&karg->ca_client.cl_addrlist[0], |
| 2013 | &arg->ca32_client.cl32_addrlist[0], |
| 2014 | (sizeof(struct in_addr) * NFSCLNT_ADDRMAX)) || |
| 2015 | __get_user(karg->ca_client.cl_fhkeytype, |
| 2016 | &arg->ca32_client.cl32_fhkeytype) || |
| 2017 | __get_user(karg->ca_client.cl_fhkeylen, |
| 2018 | &arg->ca32_client.cl32_fhkeylen) || |
| 2019 | __copy_from_user(&karg->ca_client.cl_fhkey[0], |
| 2020 | &arg->ca32_client.cl32_fhkey[0], |
| 2021 | NFSCLNT_KEYMAX)) |
| 2022 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2023 | |
Lin Feng Shen | d64b1c8 | 2006-05-20 14:59:49 -0700 | [diff] [blame] | 2024 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2025 | } |
| 2026 | |
Lin Feng Shen | d64b1c8 | 2006-05-20 14:59:49 -0700 | [diff] [blame] | 2027 | static int compat_nfs_exp_trans(struct nfsctl_arg *karg, |
| 2028 | struct compat_nfsctl_arg __user *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2029 | { |
Lin Feng Shen | d64b1c8 | 2006-05-20 14:59:49 -0700 | [diff] [blame] | 2030 | if (!access_ok(VERIFY_READ, &arg->ca32_export, |
| 2031 | sizeof(arg->ca32_export)) || |
| 2032 | get_user(karg->ca_version, &arg->ca32_version) || |
| 2033 | __copy_from_user(&karg->ca_export.ex_client[0], |
| 2034 | &arg->ca32_export.ex32_client[0], |
| 2035 | NFSCLNT_IDMAX) || |
| 2036 | __copy_from_user(&karg->ca_export.ex_path[0], |
| 2037 | &arg->ca32_export.ex32_path[0], |
| 2038 | NFS_MAXPATHLEN) || |
| 2039 | __get_user(karg->ca_export.ex_dev, |
| 2040 | &arg->ca32_export.ex32_dev) || |
| 2041 | __get_user(karg->ca_export.ex_ino, |
| 2042 | &arg->ca32_export.ex32_ino) || |
| 2043 | __get_user(karg->ca_export.ex_flags, |
| 2044 | &arg->ca32_export.ex32_flags) || |
| 2045 | __get_user(karg->ca_export.ex_anon_uid, |
| 2046 | &arg->ca32_export.ex32_anon_uid) || |
| 2047 | __get_user(karg->ca_export.ex_anon_gid, |
| 2048 | &arg->ca32_export.ex32_anon_gid)) |
| 2049 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2050 | SET_UID(karg->ca_export.ex_anon_uid, karg->ca_export.ex_anon_uid); |
| 2051 | SET_GID(karg->ca_export.ex_anon_gid, karg->ca_export.ex_anon_gid); |
| 2052 | |
Lin Feng Shen | d64b1c8 | 2006-05-20 14:59:49 -0700 | [diff] [blame] | 2053 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2054 | } |
| 2055 | |
Lin Feng Shen | d64b1c8 | 2006-05-20 14:59:49 -0700 | [diff] [blame] | 2056 | static int compat_nfs_getfd_trans(struct nfsctl_arg *karg, |
| 2057 | struct compat_nfsctl_arg __user *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2058 | { |
Lin Feng Shen | d64b1c8 | 2006-05-20 14:59:49 -0700 | [diff] [blame] | 2059 | if (!access_ok(VERIFY_READ, &arg->ca32_getfd, |
| 2060 | sizeof(arg->ca32_getfd)) || |
| 2061 | get_user(karg->ca_version, &arg->ca32_version) || |
| 2062 | __copy_from_user(&karg->ca_getfd.gd_addr, |
| 2063 | &arg->ca32_getfd.gd32_addr, |
| 2064 | (sizeof(struct sockaddr))) || |
| 2065 | __copy_from_user(&karg->ca_getfd.gd_path, |
| 2066 | &arg->ca32_getfd.gd32_path, |
| 2067 | (NFS_MAXPATHLEN+1)) || |
| 2068 | __get_user(karg->ca_getfd.gd_version, |
| 2069 | &arg->ca32_getfd.gd32_version)) |
| 2070 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2071 | |
Lin Feng Shen | d64b1c8 | 2006-05-20 14:59:49 -0700 | [diff] [blame] | 2072 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2073 | } |
| 2074 | |
Lin Feng Shen | d64b1c8 | 2006-05-20 14:59:49 -0700 | [diff] [blame] | 2075 | static int compat_nfs_getfs_trans(struct nfsctl_arg *karg, |
| 2076 | struct compat_nfsctl_arg __user *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2077 | { |
Lin Feng Shen | d64b1c8 | 2006-05-20 14:59:49 -0700 | [diff] [blame] | 2078 | if (!access_ok(VERIFY_READ,&arg->ca32_getfs,sizeof(arg->ca32_getfs)) || |
| 2079 | get_user(karg->ca_version, &arg->ca32_version) || |
| 2080 | __copy_from_user(&karg->ca_getfs.gd_addr, |
| 2081 | &arg->ca32_getfs.gd32_addr, |
| 2082 | (sizeof(struct sockaddr))) || |
| 2083 | __copy_from_user(&karg->ca_getfs.gd_path, |
| 2084 | &arg->ca32_getfs.gd32_path, |
| 2085 | (NFS_MAXPATHLEN+1)) || |
| 2086 | __get_user(karg->ca_getfs.gd_maxlen, |
| 2087 | &arg->ca32_getfs.gd32_maxlen)) |
| 2088 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2089 | |
Lin Feng Shen | d64b1c8 | 2006-05-20 14:59:49 -0700 | [diff] [blame] | 2090 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2091 | } |
| 2092 | |
| 2093 | /* This really doesn't need translations, we are only passing |
| 2094 | * back a union which contains opaque nfs file handle data. |
| 2095 | */ |
Lin Feng Shen | d64b1c8 | 2006-05-20 14:59:49 -0700 | [diff] [blame] | 2096 | static int compat_nfs_getfh_res_trans(union nfsctl_res *kres, |
| 2097 | union compat_nfsctl_res __user *res) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2098 | { |
| 2099 | int err; |
| 2100 | |
| 2101 | err = copy_to_user(res, kres, sizeof(*res)); |
| 2102 | |
| 2103 | return (err) ? -EFAULT : 0; |
| 2104 | } |
| 2105 | |
Lin Feng Shen | d64b1c8 | 2006-05-20 14:59:49 -0700 | [diff] [blame] | 2106 | asmlinkage long compat_sys_nfsservctl(int cmd, |
| 2107 | struct compat_nfsctl_arg __user *arg, |
| 2108 | union compat_nfsctl_res __user *res) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2109 | { |
| 2110 | struct nfsctl_arg *karg; |
| 2111 | union nfsctl_res *kres; |
| 2112 | mm_segment_t oldfs; |
| 2113 | int err; |
| 2114 | |
| 2115 | karg = kmalloc(sizeof(*karg), GFP_USER); |
| 2116 | kres = kmalloc(sizeof(*kres), GFP_USER); |
| 2117 | if(!karg || !kres) { |
| 2118 | err = -ENOMEM; |
| 2119 | goto done; |
| 2120 | } |
| 2121 | |
| 2122 | switch(cmd) { |
| 2123 | case NFSCTL_SVC: |
| 2124 | err = compat_nfs_svc_trans(karg, arg); |
| 2125 | break; |
| 2126 | |
| 2127 | case NFSCTL_ADDCLIENT: |
| 2128 | err = compat_nfs_clnt_trans(karg, arg); |
| 2129 | break; |
| 2130 | |
| 2131 | case NFSCTL_DELCLIENT: |
| 2132 | err = compat_nfs_clnt_trans(karg, arg); |
| 2133 | break; |
| 2134 | |
| 2135 | case NFSCTL_EXPORT: |
| 2136 | case NFSCTL_UNEXPORT: |
| 2137 | err = compat_nfs_exp_trans(karg, arg); |
| 2138 | break; |
| 2139 | |
| 2140 | case NFSCTL_GETFD: |
| 2141 | err = compat_nfs_getfd_trans(karg, arg); |
| 2142 | break; |
| 2143 | |
| 2144 | case NFSCTL_GETFS: |
| 2145 | err = compat_nfs_getfs_trans(karg, arg); |
| 2146 | break; |
| 2147 | |
| 2148 | default: |
| 2149 | err = -EINVAL; |
Peter Staubach | 57070d0 | 2006-03-25 03:08:04 -0800 | [diff] [blame] | 2150 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2151 | } |
| 2152 | |
Peter Staubach | 57070d0 | 2006-03-25 03:08:04 -0800 | [diff] [blame] | 2153 | if (err) |
| 2154 | goto done; |
| 2155 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2156 | oldfs = get_fs(); |
| 2157 | set_fs(KERNEL_DS); |
| 2158 | /* The __user pointer casts are valid because of the set_fs() */ |
| 2159 | err = sys_nfsservctl(cmd, (void __user *) karg, (void __user *) kres); |
| 2160 | set_fs(oldfs); |
| 2161 | |
| 2162 | if (err) |
| 2163 | goto done; |
| 2164 | |
| 2165 | if((cmd == NFSCTL_GETFD) || |
| 2166 | (cmd == NFSCTL_GETFS)) |
| 2167 | err = compat_nfs_getfh_res_trans(kres, res); |
| 2168 | |
| 2169 | done: |
| 2170 | kfree(karg); |
| 2171 | kfree(kres); |
| 2172 | return err; |
| 2173 | } |
| 2174 | #else /* !NFSD */ |
| 2175 | long asmlinkage compat_sys_nfsservctl(int cmd, void *notused, void *notused2) |
| 2176 | { |
| 2177 | return sys_ni_syscall(); |
| 2178 | } |
| 2179 | #endif |
Davide Libenzi | f6dfb4f | 2007-03-07 20:41:21 -0800 | [diff] [blame] | 2180 | |
| 2181 | #ifdef CONFIG_EPOLL |
| 2182 | |
Roland McGrath | f3de272 | 2008-04-30 00:53:09 -0700 | [diff] [blame] | 2183 | #ifdef HAVE_SET_RESTORE_SIGMASK |
Davide Libenzi | f6dfb4f | 2007-03-07 20:41:21 -0800 | [diff] [blame] | 2184 | asmlinkage long compat_sys_epoll_pwait(int epfd, |
| 2185 | struct compat_epoll_event __user *events, |
| 2186 | int maxevents, int timeout, |
| 2187 | const compat_sigset_t __user *sigmask, |
| 2188 | compat_size_t sigsetsize) |
| 2189 | { |
| 2190 | long err; |
| 2191 | compat_sigset_t csigmask; |
| 2192 | sigset_t ksigmask, sigsaved; |
| 2193 | |
| 2194 | /* |
| 2195 | * If the caller wants a certain signal mask to be set during the wait, |
| 2196 | * we apply it here. |
| 2197 | */ |
| 2198 | if (sigmask) { |
| 2199 | if (sigsetsize != sizeof(compat_sigset_t)) |
| 2200 | return -EINVAL; |
| 2201 | if (copy_from_user(&csigmask, sigmask, sizeof(csigmask))) |
| 2202 | return -EFAULT; |
| 2203 | sigset_from_compat(&ksigmask, &csigmask); |
| 2204 | sigdelsetmask(&ksigmask, sigmask(SIGKILL) | sigmask(SIGSTOP)); |
| 2205 | sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved); |
| 2206 | } |
| 2207 | |
Davide Libenzi | f6dfb4f | 2007-03-07 20:41:21 -0800 | [diff] [blame] | 2208 | err = sys_epoll_wait(epfd, events, maxevents, timeout); |
Davide Libenzi | f6dfb4f | 2007-03-07 20:41:21 -0800 | [diff] [blame] | 2209 | |
| 2210 | /* |
| 2211 | * If we changed the signal mask, we need to restore the original one. |
| 2212 | * In case we've got a signal while waiting, we do not restore the |
| 2213 | * signal mask yet, and we allow do_signal() to deliver the signal on |
| 2214 | * the way back to userspace, before the signal mask is restored. |
| 2215 | */ |
| 2216 | if (sigmask) { |
| 2217 | if (err == -EINTR) { |
| 2218 | memcpy(¤t->saved_sigmask, &sigsaved, |
| 2219 | sizeof(sigsaved)); |
Roland McGrath | 4e4c22c | 2008-04-30 00:53:06 -0700 | [diff] [blame] | 2220 | set_restore_sigmask(); |
Davide Libenzi | f6dfb4f | 2007-03-07 20:41:21 -0800 | [diff] [blame] | 2221 | } else |
| 2222 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); |
| 2223 | } |
| 2224 | |
| 2225 | return err; |
| 2226 | } |
Roland McGrath | f3de272 | 2008-04-30 00:53:09 -0700 | [diff] [blame] | 2227 | #endif /* HAVE_SET_RESTORE_SIGMASK */ |
Davide Libenzi | f6dfb4f | 2007-03-07 20:41:21 -0800 | [diff] [blame] | 2228 | |
| 2229 | #endif /* CONFIG_EPOLL */ |
Davide Libenzi | 6d18c92 | 2007-05-10 22:23:15 -0700 | [diff] [blame] | 2230 | |
| 2231 | #ifdef CONFIG_SIGNALFD |
| 2232 | |
Ulrich Drepper | 9deb27b | 2008-07-23 21:29:24 -0700 | [diff] [blame] | 2233 | asmlinkage long compat_sys_signalfd4(int ufd, |
| 2234 | const compat_sigset_t __user *sigmask, |
| 2235 | compat_size_t sigsetsize, int flags) |
Davide Libenzi | 6d18c92 | 2007-05-10 22:23:15 -0700 | [diff] [blame] | 2236 | { |
| 2237 | compat_sigset_t ss32; |
| 2238 | sigset_t tmp; |
| 2239 | sigset_t __user *ksigmask; |
| 2240 | |
| 2241 | if (sigsetsize != sizeof(compat_sigset_t)) |
| 2242 | return -EINVAL; |
| 2243 | if (copy_from_user(&ss32, sigmask, sizeof(ss32))) |
| 2244 | return -EFAULT; |
| 2245 | sigset_from_compat(&tmp, &ss32); |
| 2246 | ksigmask = compat_alloc_user_space(sizeof(sigset_t)); |
| 2247 | if (copy_to_user(ksigmask, &tmp, sizeof(sigset_t))) |
| 2248 | return -EFAULT; |
| 2249 | |
Ulrich Drepper | 9deb27b | 2008-07-23 21:29:24 -0700 | [diff] [blame] | 2250 | return sys_signalfd4(ufd, ksigmask, sizeof(sigset_t), flags); |
Davide Libenzi | 6d18c92 | 2007-05-10 22:23:15 -0700 | [diff] [blame] | 2251 | } |
| 2252 | |
Ulrich Drepper | 9deb27b | 2008-07-23 21:29:24 -0700 | [diff] [blame] | 2253 | asmlinkage long compat_sys_signalfd(int ufd, |
| 2254 | const compat_sigset_t __user *sigmask, |
| 2255 | compat_size_t sigsetsize) |
| 2256 | { |
| 2257 | return compat_sys_signalfd4(ufd, sigmask, sigsetsize, 0); |
| 2258 | } |
Davide Libenzi | 6d18c92 | 2007-05-10 22:23:15 -0700 | [diff] [blame] | 2259 | #endif /* CONFIG_SIGNALFD */ |
| 2260 | |
Davide Libenzi | 83f5d12 | 2007-05-10 22:23:18 -0700 | [diff] [blame] | 2261 | #ifdef CONFIG_TIMERFD |
| 2262 | |
Davide Libenzi | 4d672e7 | 2008-02-04 22:27:26 -0800 | [diff] [blame] | 2263 | asmlinkage long compat_sys_timerfd_settime(int ufd, int flags, |
| 2264 | const struct compat_itimerspec __user *utmr, |
| 2265 | struct compat_itimerspec __user *otmr) |
Davide Libenzi | 83f5d12 | 2007-05-10 22:23:18 -0700 | [diff] [blame] | 2266 | { |
Davide Libenzi | 4d672e7 | 2008-02-04 22:27:26 -0800 | [diff] [blame] | 2267 | int error; |
Davide Libenzi | 83f5d12 | 2007-05-10 22:23:18 -0700 | [diff] [blame] | 2268 | struct itimerspec t; |
| 2269 | struct itimerspec __user *ut; |
| 2270 | |
Davide Libenzi | 83f5d12 | 2007-05-10 22:23:18 -0700 | [diff] [blame] | 2271 | if (get_compat_itimerspec(&t, utmr)) |
Heiko Carstens | 8317f14 | 2007-05-16 22:11:08 -0700 | [diff] [blame] | 2272 | return -EFAULT; |
Davide Libenzi | 4d672e7 | 2008-02-04 22:27:26 -0800 | [diff] [blame] | 2273 | ut = compat_alloc_user_space(2 * sizeof(struct itimerspec)); |
| 2274 | if (copy_to_user(&ut[0], &t, sizeof(t))) |
Heiko Carstens | 8317f14 | 2007-05-16 22:11:08 -0700 | [diff] [blame] | 2275 | return -EFAULT; |
Davide Libenzi | 4d672e7 | 2008-02-04 22:27:26 -0800 | [diff] [blame] | 2276 | error = sys_timerfd_settime(ufd, flags, &ut[0], &ut[1]); |
| 2277 | if (!error && otmr) |
| 2278 | error = (copy_from_user(&t, &ut[1], sizeof(struct itimerspec)) || |
| 2279 | put_compat_itimerspec(otmr, &t)) ? -EFAULT: 0; |
Davide Libenzi | 83f5d12 | 2007-05-10 22:23:18 -0700 | [diff] [blame] | 2280 | |
Davide Libenzi | 4d672e7 | 2008-02-04 22:27:26 -0800 | [diff] [blame] | 2281 | return error; |
| 2282 | } |
| 2283 | |
| 2284 | asmlinkage long compat_sys_timerfd_gettime(int ufd, |
| 2285 | struct compat_itimerspec __user *otmr) |
| 2286 | { |
| 2287 | int error; |
| 2288 | struct itimerspec t; |
| 2289 | struct itimerspec __user *ut; |
| 2290 | |
| 2291 | ut = compat_alloc_user_space(sizeof(struct itimerspec)); |
| 2292 | error = sys_timerfd_gettime(ufd, ut); |
| 2293 | if (!error) |
| 2294 | error = (copy_from_user(&t, ut, sizeof(struct itimerspec)) || |
| 2295 | put_compat_itimerspec(otmr, &t)) ? -EFAULT: 0; |
| 2296 | |
| 2297 | return error; |
Davide Libenzi | 83f5d12 | 2007-05-10 22:23:18 -0700 | [diff] [blame] | 2298 | } |
| 2299 | |
| 2300 | #endif /* CONFIG_TIMERFD */ |