Commit | Line | Data |
---|---|---|
1da177e4 LT |
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 | ||
022a1692 | 18 | #include <linux/kernel.h> |
1da177e4 LT |
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> | |
9f3acc31 | 27 | #include <linux/fdtable.h> |
1da177e4 | 28 | #include <linux/vfs.h> |
1da177e4 LT |
29 | #include <linux/ioctl.h> |
30 | #include <linux/init.h> | |
1da177e4 LT |
31 | #include <linux/smb.h> |
32 | #include <linux/smb_mount.h> | |
33 | #include <linux/ncp_mount.h> | |
9a9947bf | 34 | #include <linux/nfs4_mount.h> |
1da177e4 LT |
35 | #include <linux/syscalls.h> |
36 | #include <linux/ctype.h> | |
37 | #include <linux/module.h> | |
38 | #include <linux/dirent.h> | |
0eeca283 | 39 | #include <linux/fsnotify.h> |
1da177e4 | 40 | #include <linux/highuid.h> |
1da177e4 LT |
41 | #include <linux/nfsd/syscall.h> |
42 | #include <linux/personality.h> | |
43 | #include <linux/rwsem.h> | |
8f0ab514 | 44 | #include <linux/tsacct_kern.h> |
6272e266 | 45 | #include <linux/security.h> |
a1f8e7f7 | 46 | #include <linux/highmem.h> |
6d18c922 | 47 | #include <linux/signal.h> |
bd01f843 | 48 | #include <linux/poll.h> |
4a805e86 | 49 | #include <linux/mm.h> |
f6dfb4fd | 50 | #include <linux/eventpoll.h> |
498052bb | 51 | #include <linux/fs_struct.h> |
1da177e4 | 52 | |
1da177e4 LT |
53 | #include <asm/uaccess.h> |
54 | #include <asm/mmu_context.h> | |
55 | #include <asm/ioctls.h> | |
07f3f05c | 56 | #include "internal.h" |
9f72949f | 57 | |
bebfa101 AK |
58 | int compat_log = 1; |
59 | ||
60 | int compat_printk(const char *fmt, ...) | |
61 | { | |
62 | va_list ap; | |
63 | int ret; | |
64 | if (!compat_log) | |
65 | return 0; | |
66 | va_start(ap, fmt); | |
67 | ret = vprintk(fmt, ap); | |
68 | va_end(ap); | |
69 | return ret; | |
70 | } | |
71 | ||
ee0b3e67 BP |
72 | #include "read_write.h" |
73 | ||
1da177e4 LT |
74 | /* |
75 | * Not all architectures have sys_utime, so implement this in terms | |
76 | * of sys_utimes. | |
77 | */ | |
78 | asmlinkage long compat_sys_utime(char __user *filename, struct compat_utimbuf __user *t) | |
79 | { | |
1c710c89 | 80 | struct timespec tv[2]; |
1da177e4 LT |
81 | |
82 | if (t) { | |
83 | if (get_user(tv[0].tv_sec, &t->actime) || | |
84 | get_user(tv[1].tv_sec, &t->modtime)) | |
85 | return -EFAULT; | |
1c710c89 UD |
86 | tv[0].tv_nsec = 0; |
87 | tv[1].tv_nsec = 0; | |
1da177e4 | 88 | } |
1c710c89 UD |
89 | return do_utimes(AT_FDCWD, filename, t ? tv : NULL, 0); |
90 | } | |
91 | ||
92 | asmlinkage long compat_sys_utimensat(unsigned int dfd, char __user *filename, struct compat_timespec __user *t, int flags) | |
93 | { | |
94 | struct timespec tv[2]; | |
95 | ||
96 | if (t) { | |
97 | if (get_compat_timespec(&tv[0], &t[0]) || | |
98 | get_compat_timespec(&tv[1], &t[1])) | |
99 | return -EFAULT; | |
100 | ||
1c710c89 UD |
101 | if (tv[0].tv_nsec == UTIME_OMIT && tv[1].tv_nsec == UTIME_OMIT) |
102 | return 0; | |
103 | } | |
104 | return do_utimes(dfd, filename, t ? tv : NULL, flags); | |
1da177e4 LT |
105 | } |
106 | ||
9ad11ab4 | 107 | asmlinkage long compat_sys_futimesat(unsigned int dfd, char __user *filename, struct compat_timeval __user *t) |
1da177e4 | 108 | { |
1c710c89 | 109 | struct timespec tv[2]; |
1da177e4 | 110 | |
9ad11ab4 | 111 | if (t) { |
1da177e4 | 112 | if (get_user(tv[0].tv_sec, &t[0].tv_sec) || |
1c710c89 | 113 | get_user(tv[0].tv_nsec, &t[0].tv_usec) || |
1da177e4 | 114 | get_user(tv[1].tv_sec, &t[1].tv_sec) || |
1c710c89 | 115 | get_user(tv[1].tv_nsec, &t[1].tv_usec)) |
9ad11ab4 | 116 | return -EFAULT; |
1c710c89 UD |
117 | if (tv[0].tv_nsec >= 1000000 || tv[0].tv_nsec < 0 || |
118 | tv[1].tv_nsec >= 1000000 || tv[1].tv_nsec < 0) | |
119 | return -EINVAL; | |
120 | tv[0].tv_nsec *= 1000; | |
121 | tv[1].tv_nsec *= 1000; | |
9ad11ab4 | 122 | } |
1c710c89 | 123 | return do_utimes(dfd, filename, t ? tv : NULL, 0); |
5590ff0d UD |
124 | } |
125 | ||
126 | asmlinkage long compat_sys_utimes(char __user *filename, struct compat_timeval __user *t) | |
127 | { | |
128 | return compat_sys_futimesat(AT_FDCWD, filename, t); | |
1da177e4 LT |
129 | } |
130 | ||
f7a5000f CH |
131 | static int cp_compat_stat(struct kstat *stat, struct compat_stat __user *ubuf) |
132 | { | |
133 | compat_ino_t ino = stat->ino; | |
134 | typeof(ubuf->st_uid) uid = 0; | |
135 | typeof(ubuf->st_gid) gid = 0; | |
136 | int err; | |
137 | ||
138 | SET_UID(uid, stat->uid); | |
139 | SET_GID(gid, stat->gid); | |
140 | ||
141 | if ((u64) stat->size > MAX_NON_LFS || | |
142 | !old_valid_dev(stat->dev) || | |
143 | !old_valid_dev(stat->rdev)) | |
144 | return -EOVERFLOW; | |
145 | if (sizeof(ino) < sizeof(stat->ino) && ino != stat->ino) | |
146 | return -EOVERFLOW; | |
147 | ||
148 | if (clear_user(ubuf, sizeof(*ubuf))) | |
149 | return -EFAULT; | |
150 | ||
151 | err = __put_user(old_encode_dev(stat->dev), &ubuf->st_dev); | |
152 | err |= __put_user(ino, &ubuf->st_ino); | |
153 | err |= __put_user(stat->mode, &ubuf->st_mode); | |
154 | err |= __put_user(stat->nlink, &ubuf->st_nlink); | |
155 | err |= __put_user(uid, &ubuf->st_uid); | |
156 | err |= __put_user(gid, &ubuf->st_gid); | |
157 | err |= __put_user(old_encode_dev(stat->rdev), &ubuf->st_rdev); | |
158 | err |= __put_user(stat->size, &ubuf->st_size); | |
159 | err |= __put_user(stat->atime.tv_sec, &ubuf->st_atime); | |
160 | err |= __put_user(stat->atime.tv_nsec, &ubuf->st_atime_nsec); | |
161 | err |= __put_user(stat->mtime.tv_sec, &ubuf->st_mtime); | |
162 | err |= __put_user(stat->mtime.tv_nsec, &ubuf->st_mtime_nsec); | |
163 | err |= __put_user(stat->ctime.tv_sec, &ubuf->st_ctime); | |
164 | err |= __put_user(stat->ctime.tv_nsec, &ubuf->st_ctime_nsec); | |
165 | err |= __put_user(stat->blksize, &ubuf->st_blksize); | |
166 | err |= __put_user(stat->blocks, &ubuf->st_blocks); | |
167 | return err; | |
168 | } | |
169 | ||
1da177e4 LT |
170 | asmlinkage long compat_sys_newstat(char __user * filename, |
171 | struct compat_stat __user *statbuf) | |
172 | { | |
173 | struct kstat stat; | |
2eae7a18 | 174 | int error; |
1da177e4 | 175 | |
2eae7a18 CH |
176 | error = vfs_stat(filename, &stat); |
177 | if (error) | |
178 | return error; | |
179 | return cp_compat_stat(&stat, statbuf); | |
1da177e4 LT |
180 | } |
181 | ||
182 | asmlinkage long compat_sys_newlstat(char __user * filename, | |
183 | struct compat_stat __user *statbuf) | |
184 | { | |
185 | struct kstat stat; | |
2eae7a18 | 186 | int error; |
1da177e4 | 187 | |
2eae7a18 CH |
188 | error = vfs_lstat(filename, &stat); |
189 | if (error) | |
190 | return error; | |
191 | return cp_compat_stat(&stat, statbuf); | |
1da177e4 LT |
192 | } |
193 | ||
82d821dd | 194 | #ifndef __ARCH_WANT_STAT64 |
9ad11ab4 | 195 | asmlinkage long compat_sys_newfstatat(unsigned int dfd, char __user *filename, |
5590ff0d UD |
196 | struct compat_stat __user *statbuf, int flag) |
197 | { | |
198 | struct kstat stat; | |
0112fc22 | 199 | int error; |
5590ff0d | 200 | |
0112fc22 OD |
201 | error = vfs_fstatat(dfd, filename, &stat, flag); |
202 | if (error) | |
203 | return error; | |
204 | return cp_compat_stat(&stat, statbuf); | |
5590ff0d | 205 | } |
82d821dd | 206 | #endif |
5590ff0d | 207 | |
1da177e4 LT |
208 | asmlinkage long compat_sys_newfstat(unsigned int fd, |
209 | struct compat_stat __user * statbuf) | |
210 | { | |
211 | struct kstat stat; | |
212 | int error = vfs_fstat(fd, &stat); | |
213 | ||
214 | if (!error) | |
215 | error = cp_compat_stat(&stat, statbuf); | |
216 | return error; | |
217 | } | |
218 | ||
219 | static int put_compat_statfs(struct compat_statfs __user *ubuf, struct kstatfs *kbuf) | |
220 | { | |
221 | ||
222 | if (sizeof ubuf->f_blocks == 4) { | |
f4a67cce JT |
223 | if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail | |
224 | kbuf->f_bsize | kbuf->f_frsize) & 0xffffffff00000000ULL) | |
1da177e4 LT |
225 | return -EOVERFLOW; |
226 | /* f_files and f_ffree may be -1; it's okay | |
227 | * to stuff that into 32 bits */ | |
228 | if (kbuf->f_files != 0xffffffffffffffffULL | |
229 | && (kbuf->f_files & 0xffffffff00000000ULL)) | |
230 | return -EOVERFLOW; | |
231 | if (kbuf->f_ffree != 0xffffffffffffffffULL | |
232 | && (kbuf->f_ffree & 0xffffffff00000000ULL)) | |
233 | return -EOVERFLOW; | |
234 | } | |
235 | if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) || | |
236 | __put_user(kbuf->f_type, &ubuf->f_type) || | |
237 | __put_user(kbuf->f_bsize, &ubuf->f_bsize) || | |
238 | __put_user(kbuf->f_blocks, &ubuf->f_blocks) || | |
239 | __put_user(kbuf->f_bfree, &ubuf->f_bfree) || | |
240 | __put_user(kbuf->f_bavail, &ubuf->f_bavail) || | |
241 | __put_user(kbuf->f_files, &ubuf->f_files) || | |
242 | __put_user(kbuf->f_ffree, &ubuf->f_ffree) || | |
243 | __put_user(kbuf->f_namelen, &ubuf->f_namelen) || | |
244 | __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) || | |
245 | __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) || | |
246 | __put_user(kbuf->f_frsize, &ubuf->f_frsize) || | |
247 | __put_user(0, &ubuf->f_spare[0]) || | |
248 | __put_user(0, &ubuf->f_spare[1]) || | |
249 | __put_user(0, &ubuf->f_spare[2]) || | |
250 | __put_user(0, &ubuf->f_spare[3]) || | |
251 | __put_user(0, &ubuf->f_spare[4])) | |
252 | return -EFAULT; | |
253 | return 0; | |
254 | } | |
255 | ||
256 | /* | |
257 | * The following statfs calls are copies of code from fs/open.c and | |
258 | * should be checked against those from time to time | |
259 | */ | |
2d8f3038 | 260 | asmlinkage long compat_sys_statfs(const char __user *pathname, struct compat_statfs __user *buf) |
1da177e4 | 261 | { |
2d8f3038 | 262 | struct path path; |
1da177e4 LT |
263 | int error; |
264 | ||
2d8f3038 | 265 | error = user_path(pathname, &path); |
1da177e4 LT |
266 | if (!error) { |
267 | struct kstatfs tmp; | |
2d8f3038 | 268 | error = vfs_statfs(path.dentry, &tmp); |
86e07ce7 DG |
269 | if (!error) |
270 | error = put_compat_statfs(buf, &tmp); | |
2d8f3038 | 271 | path_put(&path); |
1da177e4 LT |
272 | } |
273 | return error; | |
274 | } | |
275 | ||
276 | asmlinkage long compat_sys_fstatfs(unsigned int fd, struct compat_statfs __user *buf) | |
277 | { | |
278 | struct file * file; | |
279 | struct kstatfs tmp; | |
280 | int error; | |
281 | ||
282 | error = -EBADF; | |
283 | file = fget(fd); | |
284 | if (!file) | |
285 | goto out; | |
0f7fc9e4 | 286 | error = vfs_statfs(file->f_path.dentry, &tmp); |
86e07ce7 DG |
287 | if (!error) |
288 | error = put_compat_statfs(buf, &tmp); | |
1da177e4 LT |
289 | fput(file); |
290 | out: | |
291 | return error; | |
292 | } | |
293 | ||
294 | static int put_compat_statfs64(struct compat_statfs64 __user *ubuf, struct kstatfs *kbuf) | |
295 | { | |
296 | if (sizeof ubuf->f_blocks == 4) { | |
f4a67cce JT |
297 | if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail | |
298 | kbuf->f_bsize | kbuf->f_frsize) & 0xffffffff00000000ULL) | |
1da177e4 LT |
299 | return -EOVERFLOW; |
300 | /* f_files and f_ffree may be -1; it's okay | |
301 | * to stuff that into 32 bits */ | |
302 | if (kbuf->f_files != 0xffffffffffffffffULL | |
303 | && (kbuf->f_files & 0xffffffff00000000ULL)) | |
304 | return -EOVERFLOW; | |
305 | if (kbuf->f_ffree != 0xffffffffffffffffULL | |
306 | && (kbuf->f_ffree & 0xffffffff00000000ULL)) | |
307 | return -EOVERFLOW; | |
308 | } | |
309 | if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) || | |
310 | __put_user(kbuf->f_type, &ubuf->f_type) || | |
311 | __put_user(kbuf->f_bsize, &ubuf->f_bsize) || | |
312 | __put_user(kbuf->f_blocks, &ubuf->f_blocks) || | |
313 | __put_user(kbuf->f_bfree, &ubuf->f_bfree) || | |
314 | __put_user(kbuf->f_bavail, &ubuf->f_bavail) || | |
315 | __put_user(kbuf->f_files, &ubuf->f_files) || | |
316 | __put_user(kbuf->f_ffree, &ubuf->f_ffree) || | |
317 | __put_user(kbuf->f_namelen, &ubuf->f_namelen) || | |
318 | __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) || | |
319 | __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) || | |
320 | __put_user(kbuf->f_frsize, &ubuf->f_frsize)) | |
321 | return -EFAULT; | |
322 | return 0; | |
323 | } | |
324 | ||
2d8f3038 | 325 | asmlinkage long compat_sys_statfs64(const char __user *pathname, compat_size_t sz, struct compat_statfs64 __user *buf) |
1da177e4 | 326 | { |
2d8f3038 | 327 | struct path path; |
1da177e4 LT |
328 | int error; |
329 | ||
330 | if (sz != sizeof(*buf)) | |
331 | return -EINVAL; | |
332 | ||
2d8f3038 | 333 | error = user_path(pathname, &path); |
1da177e4 LT |
334 | if (!error) { |
335 | struct kstatfs tmp; | |
2d8f3038 | 336 | error = vfs_statfs(path.dentry, &tmp); |
86e07ce7 DG |
337 | if (!error) |
338 | error = put_compat_statfs64(buf, &tmp); | |
2d8f3038 | 339 | path_put(&path); |
1da177e4 LT |
340 | } |
341 | return error; | |
342 | } | |
343 | ||
344 | asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz, struct compat_statfs64 __user *buf) | |
345 | { | |
346 | struct file * file; | |
347 | struct kstatfs tmp; | |
348 | int error; | |
349 | ||
350 | if (sz != sizeof(*buf)) | |
351 | return -EINVAL; | |
352 | ||
353 | error = -EBADF; | |
354 | file = fget(fd); | |
355 | if (!file) | |
356 | goto out; | |
0f7fc9e4 | 357 | error = vfs_statfs(file->f_path.dentry, &tmp); |
86e07ce7 DG |
358 | if (!error) |
359 | error = put_compat_statfs64(buf, &tmp); | |
1da177e4 LT |
360 | fput(file); |
361 | out: | |
362 | return error; | |
363 | } | |
364 | ||
2b1c6bd7 CH |
365 | /* |
366 | * This is a copy of sys_ustat, just dealing with a structure layout. | |
367 | * Given how simple this syscall is that apporach is more maintainable | |
368 | * than the various conversion hacks. | |
369 | */ | |
370 | asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u) | |
371 | { | |
372 | struct super_block *sb; | |
373 | struct compat_ustat tmp; | |
374 | struct kstatfs sbuf; | |
375 | int err; | |
376 | ||
377 | sb = user_get_super(new_decode_dev(dev)); | |
378 | if (!sb) | |
379 | return -EINVAL; | |
380 | err = vfs_statfs(sb->s_root, &sbuf); | |
381 | drop_super(sb); | |
382 | if (err) | |
383 | return err; | |
384 | ||
385 | memset(&tmp, 0, sizeof(struct compat_ustat)); | |
386 | tmp.f_tfree = sbuf.f_bfree; | |
387 | tmp.f_tinode = sbuf.f_ffree; | |
388 | if (copy_to_user(u, &tmp, sizeof(struct compat_ustat))) | |
389 | return -EFAULT; | |
390 | return 0; | |
391 | } | |
392 | ||
1da177e4 LT |
393 | static int get_compat_flock(struct flock *kfl, struct compat_flock __user *ufl) |
394 | { | |
395 | if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) || | |
396 | __get_user(kfl->l_type, &ufl->l_type) || | |
397 | __get_user(kfl->l_whence, &ufl->l_whence) || | |
398 | __get_user(kfl->l_start, &ufl->l_start) || | |
399 | __get_user(kfl->l_len, &ufl->l_len) || | |
400 | __get_user(kfl->l_pid, &ufl->l_pid)) | |
401 | return -EFAULT; | |
402 | return 0; | |
403 | } | |
404 | ||
405 | static int put_compat_flock(struct flock *kfl, struct compat_flock __user *ufl) | |
406 | { | |
407 | if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) || | |
408 | __put_user(kfl->l_type, &ufl->l_type) || | |
409 | __put_user(kfl->l_whence, &ufl->l_whence) || | |
410 | __put_user(kfl->l_start, &ufl->l_start) || | |
411 | __put_user(kfl->l_len, &ufl->l_len) || | |
412 | __put_user(kfl->l_pid, &ufl->l_pid)) | |
413 | return -EFAULT; | |
414 | return 0; | |
415 | } | |
416 | ||
417 | #ifndef HAVE_ARCH_GET_COMPAT_FLOCK64 | |
418 | static int get_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl) | |
419 | { | |
420 | if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) || | |
421 | __get_user(kfl->l_type, &ufl->l_type) || | |
422 | __get_user(kfl->l_whence, &ufl->l_whence) || | |
423 | __get_user(kfl->l_start, &ufl->l_start) || | |
424 | __get_user(kfl->l_len, &ufl->l_len) || | |
425 | __get_user(kfl->l_pid, &ufl->l_pid)) | |
426 | return -EFAULT; | |
427 | return 0; | |
428 | } | |
429 | #endif | |
430 | ||
431 | #ifndef HAVE_ARCH_PUT_COMPAT_FLOCK64 | |
432 | static int put_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl) | |
433 | { | |
434 | if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) || | |
435 | __put_user(kfl->l_type, &ufl->l_type) || | |
436 | __put_user(kfl->l_whence, &ufl->l_whence) || | |
437 | __put_user(kfl->l_start, &ufl->l_start) || | |
438 | __put_user(kfl->l_len, &ufl->l_len) || | |
439 | __put_user(kfl->l_pid, &ufl->l_pid)) | |
440 | return -EFAULT; | |
441 | return 0; | |
442 | } | |
443 | #endif | |
444 | ||
445 | asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd, | |
446 | unsigned long arg) | |
447 | { | |
448 | mm_segment_t old_fs; | |
449 | struct flock f; | |
450 | long ret; | |
451 | ||
452 | switch (cmd) { | |
453 | case F_GETLK: | |
454 | case F_SETLK: | |
455 | case F_SETLKW: | |
456 | ret = get_compat_flock(&f, compat_ptr(arg)); | |
457 | if (ret != 0) | |
458 | break; | |
459 | old_fs = get_fs(); | |
460 | set_fs(KERNEL_DS); | |
461 | ret = sys_fcntl(fd, cmd, (unsigned long)&f); | |
462 | set_fs(old_fs); | |
463 | if (cmd == F_GETLK && ret == 0) { | |
ff677f8d | 464 | /* GETLK was successful and we need to return the data... |
2520f14c N |
465 | * but it needs to fit in the compat structure. |
466 | * l_start shouldn't be too big, unless the original | |
467 | * start + end is greater than COMPAT_OFF_T_MAX, in which | |
468 | * case the app was asking for trouble, so we return | |
469 | * -EOVERFLOW in that case. | |
470 | * l_len could be too big, in which case we just truncate it, | |
471 | * and only allow the app to see that part of the conflicting | |
472 | * lock that might make sense to it anyway | |
473 | */ | |
474 | ||
475 | if (f.l_start > COMPAT_OFF_T_MAX) | |
1da177e4 | 476 | ret = -EOVERFLOW; |
2520f14c N |
477 | if (f.l_len > COMPAT_OFF_T_MAX) |
478 | f.l_len = COMPAT_OFF_T_MAX; | |
1da177e4 LT |
479 | if (ret == 0) |
480 | ret = put_compat_flock(&f, compat_ptr(arg)); | |
481 | } | |
482 | break; | |
483 | ||
484 | case F_GETLK64: | |
485 | case F_SETLK64: | |
486 | case F_SETLKW64: | |
487 | ret = get_compat_flock64(&f, compat_ptr(arg)); | |
488 | if (ret != 0) | |
489 | break; | |
490 | old_fs = get_fs(); | |
491 | set_fs(KERNEL_DS); | |
492 | ret = sys_fcntl(fd, (cmd == F_GETLK64) ? F_GETLK : | |
493 | ((cmd == F_SETLK64) ? F_SETLK : F_SETLKW), | |
494 | (unsigned long)&f); | |
495 | set_fs(old_fs); | |
496 | if (cmd == F_GETLK64 && ret == 0) { | |
2520f14c N |
497 | /* need to return lock information - see above for commentary */ |
498 | if (f.l_start > COMPAT_LOFF_T_MAX) | |
1da177e4 | 499 | ret = -EOVERFLOW; |
2520f14c N |
500 | if (f.l_len > COMPAT_LOFF_T_MAX) |
501 | f.l_len = COMPAT_LOFF_T_MAX; | |
1da177e4 LT |
502 | if (ret == 0) |
503 | ret = put_compat_flock64(&f, compat_ptr(arg)); | |
504 | } | |
505 | break; | |
506 | ||
507 | default: | |
508 | ret = sys_fcntl(fd, cmd, arg); | |
509 | break; | |
510 | } | |
511 | return ret; | |
512 | } | |
513 | ||
514 | asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd, | |
515 | unsigned long arg) | |
516 | { | |
517 | if ((cmd == F_GETLK64) || (cmd == F_SETLK64) || (cmd == F_SETLKW64)) | |
518 | return -EINVAL; | |
519 | return compat_sys_fcntl64(fd, cmd, arg); | |
520 | } | |
521 | ||
522 | asmlinkage long | |
523 | compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p) | |
524 | { | |
525 | long ret; | |
526 | aio_context_t ctx64; | |
527 | ||
528 | mm_segment_t oldfs = get_fs(); | |
529 | if (unlikely(get_user(ctx64, ctx32p))) | |
530 | return -EFAULT; | |
531 | ||
532 | set_fs(KERNEL_DS); | |
533 | /* The __user pointer cast is valid because of the set_fs() */ | |
534 | ret = sys_io_setup(nr_reqs, (aio_context_t __user *) &ctx64); | |
535 | set_fs(oldfs); | |
536 | /* truncating is ok because it's a user address */ | |
537 | if (!ret) | |
538 | ret = put_user((u32) ctx64, ctx32p); | |
539 | return ret; | |
540 | } | |
541 | ||
542 | asmlinkage long | |
543 | compat_sys_io_getevents(aio_context_t ctx_id, | |
544 | unsigned long min_nr, | |
545 | unsigned long nr, | |
546 | struct io_event __user *events, | |
547 | struct compat_timespec __user *timeout) | |
548 | { | |
549 | long ret; | |
550 | struct timespec t; | |
551 | struct timespec __user *ut = NULL; | |
552 | ||
553 | ret = -EFAULT; | |
554 | if (unlikely(!access_ok(VERIFY_WRITE, events, | |
555 | nr * sizeof(struct io_event)))) | |
556 | goto out; | |
557 | if (timeout) { | |
558 | if (get_compat_timespec(&t, timeout)) | |
559 | goto out; | |
560 | ||
561 | ut = compat_alloc_user_space(sizeof(*ut)); | |
562 | if (copy_to_user(ut, &t, sizeof(t)) ) | |
563 | goto out; | |
564 | } | |
565 | ret = sys_io_getevents(ctx_id, min_nr, nr, events, ut); | |
566 | out: | |
567 | return ret; | |
568 | } | |
569 | ||
570 | static inline long | |
571 | copy_iocb(long nr, u32 __user *ptr32, struct iocb __user * __user *ptr64) | |
572 | { | |
573 | compat_uptr_t uptr; | |
574 | int i; | |
575 | ||
576 | for (i = 0; i < nr; ++i) { | |
577 | if (get_user(uptr, ptr32 + i)) | |
578 | return -EFAULT; | |
579 | if (put_user(compat_ptr(uptr), ptr64 + i)) | |
580 | return -EFAULT; | |
581 | } | |
582 | return 0; | |
583 | } | |
584 | ||
585 | #define MAX_AIO_SUBMITS (PAGE_SIZE/sizeof(struct iocb *)) | |
586 | ||
587 | asmlinkage long | |
588 | compat_sys_io_submit(aio_context_t ctx_id, int nr, u32 __user *iocb) | |
589 | { | |
590 | struct iocb __user * __user *iocb64; | |
591 | long ret; | |
592 | ||
593 | if (unlikely(nr < 0)) | |
594 | return -EINVAL; | |
595 | ||
596 | if (nr > MAX_AIO_SUBMITS) | |
597 | nr = MAX_AIO_SUBMITS; | |
598 | ||
599 | iocb64 = compat_alloc_user_space(nr * sizeof(*iocb64)); | |
600 | ret = copy_iocb(nr, iocb, iocb64); | |
601 | if (!ret) | |
602 | ret = sys_io_submit(ctx_id, nr, iocb64); | |
603 | return ret; | |
604 | } | |
605 | ||
606 | struct compat_ncp_mount_data { | |
607 | compat_int_t version; | |
608 | compat_uint_t ncp_fd; | |
202e5979 | 609 | __compat_uid_t mounted_uid; |
1da177e4 LT |
610 | compat_pid_t wdog_pid; |
611 | unsigned char mounted_vol[NCP_VOLNAME_LEN + 1]; | |
612 | compat_uint_t time_out; | |
613 | compat_uint_t retry_count; | |
614 | compat_uint_t flags; | |
202e5979 SR |
615 | __compat_uid_t uid; |
616 | __compat_gid_t gid; | |
1da177e4 LT |
617 | compat_mode_t file_mode; |
618 | compat_mode_t dir_mode; | |
619 | }; | |
620 | ||
621 | struct compat_ncp_mount_data_v4 { | |
622 | compat_int_t version; | |
623 | compat_ulong_t flags; | |
624 | compat_ulong_t mounted_uid; | |
625 | compat_long_t wdog_pid; | |
626 | compat_uint_t ncp_fd; | |
627 | compat_uint_t time_out; | |
628 | compat_uint_t retry_count; | |
629 | compat_ulong_t uid; | |
630 | compat_ulong_t gid; | |
631 | compat_ulong_t file_mode; | |
632 | compat_ulong_t dir_mode; | |
633 | }; | |
634 | ||
635 | static void *do_ncp_super_data_conv(void *raw_data) | |
636 | { | |
637 | int version = *(unsigned int *)raw_data; | |
638 | ||
639 | if (version == 3) { | |
640 | struct compat_ncp_mount_data *c_n = raw_data; | |
641 | struct ncp_mount_data *n = raw_data; | |
642 | ||
643 | n->dir_mode = c_n->dir_mode; | |
644 | n->file_mode = c_n->file_mode; | |
645 | n->gid = c_n->gid; | |
646 | n->uid = c_n->uid; | |
647 | memmove (n->mounted_vol, c_n->mounted_vol, (sizeof (c_n->mounted_vol) + 3 * sizeof (unsigned int))); | |
648 | n->wdog_pid = c_n->wdog_pid; | |
649 | n->mounted_uid = c_n->mounted_uid; | |
650 | } else if (version == 4) { | |
651 | struct compat_ncp_mount_data_v4 *c_n = raw_data; | |
652 | struct ncp_mount_data_v4 *n = raw_data; | |
653 | ||
654 | n->dir_mode = c_n->dir_mode; | |
655 | n->file_mode = c_n->file_mode; | |
656 | n->gid = c_n->gid; | |
657 | n->uid = c_n->uid; | |
658 | n->retry_count = c_n->retry_count; | |
659 | n->time_out = c_n->time_out; | |
660 | n->ncp_fd = c_n->ncp_fd; | |
661 | n->wdog_pid = c_n->wdog_pid; | |
662 | n->mounted_uid = c_n->mounted_uid; | |
663 | n->flags = c_n->flags; | |
664 | } else if (version != 5) { | |
665 | return NULL; | |
666 | } | |
667 | ||
668 | return raw_data; | |
669 | } | |
670 | ||
671 | struct compat_smb_mount_data { | |
672 | compat_int_t version; | |
202e5979 SR |
673 | __compat_uid_t mounted_uid; |
674 | __compat_uid_t uid; | |
675 | __compat_gid_t gid; | |
1da177e4 LT |
676 | compat_mode_t file_mode; |
677 | compat_mode_t dir_mode; | |
678 | }; | |
679 | ||
680 | static void *do_smb_super_data_conv(void *raw_data) | |
681 | { | |
682 | struct smb_mount_data *s = raw_data; | |
683 | struct compat_smb_mount_data *c_s = raw_data; | |
684 | ||
685 | if (c_s->version != SMB_MOUNT_OLDVERSION) | |
686 | goto out; | |
687 | s->dir_mode = c_s->dir_mode; | |
688 | s->file_mode = c_s->file_mode; | |
689 | s->gid = c_s->gid; | |
690 | s->uid = c_s->uid; | |
691 | s->mounted_uid = c_s->mounted_uid; | |
692 | out: | |
693 | return raw_data; | |
694 | } | |
695 | ||
9a9947bf DH |
696 | struct compat_nfs_string { |
697 | compat_uint_t len; | |
5fc3e624 | 698 | compat_uptr_t data; |
9a9947bf DH |
699 | }; |
700 | ||
701 | static inline void compat_nfs_string(struct nfs_string *dst, | |
702 | struct compat_nfs_string *src) | |
703 | { | |
704 | dst->data = compat_ptr(src->data); | |
705 | dst->len = src->len; | |
706 | } | |
707 | ||
708 | struct compat_nfs4_mount_data_v1 { | |
709 | compat_int_t version; | |
710 | compat_int_t flags; | |
711 | compat_int_t rsize; | |
712 | compat_int_t wsize; | |
713 | compat_int_t timeo; | |
714 | compat_int_t retrans; | |
715 | compat_int_t acregmin; | |
716 | compat_int_t acregmax; | |
717 | compat_int_t acdirmin; | |
718 | compat_int_t acdirmax; | |
719 | struct compat_nfs_string client_addr; | |
720 | struct compat_nfs_string mnt_path; | |
721 | struct compat_nfs_string hostname; | |
722 | compat_uint_t host_addrlen; | |
5fc3e624 | 723 | compat_uptr_t host_addr; |
9a9947bf DH |
724 | compat_int_t proto; |
725 | compat_int_t auth_flavourlen; | |
5fc3e624 | 726 | compat_uptr_t auth_flavours; |
9a9947bf DH |
727 | }; |
728 | ||
729 | static int do_nfs4_super_data_conv(void *raw_data) | |
730 | { | |
731 | int version = *(compat_uint_t *) raw_data; | |
732 | ||
733 | if (version == 1) { | |
734 | struct compat_nfs4_mount_data_v1 *raw = raw_data; | |
735 | struct nfs4_mount_data *real = raw_data; | |
736 | ||
737 | /* copy the fields backwards */ | |
738 | real->auth_flavours = compat_ptr(raw->auth_flavours); | |
739 | real->auth_flavourlen = raw->auth_flavourlen; | |
740 | real->proto = raw->proto; | |
741 | real->host_addr = compat_ptr(raw->host_addr); | |
742 | real->host_addrlen = raw->host_addrlen; | |
743 | compat_nfs_string(&real->hostname, &raw->hostname); | |
744 | compat_nfs_string(&real->mnt_path, &raw->mnt_path); | |
745 | compat_nfs_string(&real->client_addr, &raw->client_addr); | |
746 | real->acdirmax = raw->acdirmax; | |
747 | real->acdirmin = raw->acdirmin; | |
748 | real->acregmax = raw->acregmax; | |
749 | real->acregmin = raw->acregmin; | |
750 | real->retrans = raw->retrans; | |
751 | real->timeo = raw->timeo; | |
752 | real->wsize = raw->wsize; | |
753 | real->rsize = raw->rsize; | |
754 | real->flags = raw->flags; | |
755 | real->version = raw->version; | |
756 | } | |
9a9947bf DH |
757 | |
758 | return 0; | |
759 | } | |
760 | ||
1da177e4 LT |
761 | #define SMBFS_NAME "smbfs" |
762 | #define NCPFS_NAME "ncpfs" | |
9a9947bf | 763 | #define NFS4_NAME "nfs4" |
1da177e4 LT |
764 | |
765 | asmlinkage long compat_sys_mount(char __user * dev_name, char __user * dir_name, | |
766 | char __user * type, unsigned long flags, | |
767 | void __user * data) | |
768 | { | |
eca6f534 | 769 | char *kernel_type; |
1da177e4 | 770 | unsigned long data_page; |
eca6f534 | 771 | char *kernel_dev; |
1da177e4 LT |
772 | char *dir_page; |
773 | int retval; | |
774 | ||
eca6f534 | 775 | retval = copy_mount_string(type, &kernel_type); |
1da177e4 LT |
776 | if (retval < 0) |
777 | goto out; | |
778 | ||
779 | dir_page = getname(dir_name); | |
780 | retval = PTR_ERR(dir_page); | |
781 | if (IS_ERR(dir_page)) | |
782 | goto out1; | |
783 | ||
eca6f534 | 784 | retval = copy_mount_string(dev_name, &kernel_dev); |
1da177e4 LT |
785 | if (retval < 0) |
786 | goto out2; | |
787 | ||
eca6f534 | 788 | retval = copy_mount_options(data, &data_page); |
1da177e4 LT |
789 | if (retval < 0) |
790 | goto out3; | |
791 | ||
792 | retval = -EINVAL; | |
793 | ||
eca6f534 VN |
794 | if (kernel_type && data_page) { |
795 | if (!strcmp(kernel_type, SMBFS_NAME)) { | |
1da177e4 | 796 | do_smb_super_data_conv((void *)data_page); |
eca6f534 | 797 | } else if (!strcmp(kernel_type, NCPFS_NAME)) { |
1da177e4 | 798 | do_ncp_super_data_conv((void *)data_page); |
eca6f534 | 799 | } else if (!strcmp(kernel_type, NFS4_NAME)) { |
9a9947bf DH |
800 | if (do_nfs4_super_data_conv((void *) data_page)) |
801 | goto out4; | |
1da177e4 LT |
802 | } |
803 | } | |
804 | ||
eca6f534 | 805 | retval = do_mount(kernel_dev, dir_page, kernel_type, |
1da177e4 | 806 | flags, (void*)data_page); |
1da177e4 | 807 | |
9a9947bf | 808 | out4: |
1da177e4 LT |
809 | free_page(data_page); |
810 | out3: | |
eca6f534 | 811 | kfree(kernel_dev); |
1da177e4 LT |
812 | out2: |
813 | putname(dir_page); | |
814 | out1: | |
eca6f534 | 815 | kfree(kernel_type); |
1da177e4 LT |
816 | out: |
817 | return retval; | |
818 | } | |
819 | ||
820 | #define NAME_OFFSET(de) ((int) ((de)->d_name - (char __user *) (de))) | |
1da177e4 LT |
821 | |
822 | struct compat_old_linux_dirent { | |
823 | compat_ulong_t d_ino; | |
824 | compat_ulong_t d_offset; | |
825 | unsigned short d_namlen; | |
826 | char d_name[1]; | |
827 | }; | |
828 | ||
829 | struct compat_readdir_callback { | |
830 | struct compat_old_linux_dirent __user *dirent; | |
831 | int result; | |
832 | }; | |
833 | ||
834 | static int compat_fillonedir(void *__buf, const char *name, int namlen, | |
afefdbb2 | 835 | loff_t offset, u64 ino, unsigned int d_type) |
1da177e4 LT |
836 | { |
837 | struct compat_readdir_callback *buf = __buf; | |
838 | struct compat_old_linux_dirent __user *dirent; | |
afefdbb2 | 839 | compat_ulong_t d_ino; |
1da177e4 LT |
840 | |
841 | if (buf->result) | |
842 | return -EINVAL; | |
afefdbb2 | 843 | d_ino = ino; |
8f3f655d AV |
844 | if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) { |
845 | buf->result = -EOVERFLOW; | |
afefdbb2 | 846 | return -EOVERFLOW; |
8f3f655d | 847 | } |
1da177e4 LT |
848 | buf->result++; |
849 | dirent = buf->dirent; | |
850 | if (!access_ok(VERIFY_WRITE, dirent, | |
851 | (unsigned long)(dirent->d_name + namlen + 1) - | |
852 | (unsigned long)dirent)) | |
853 | goto efault; | |
afefdbb2 | 854 | if ( __put_user(d_ino, &dirent->d_ino) || |
1da177e4 LT |
855 | __put_user(offset, &dirent->d_offset) || |
856 | __put_user(namlen, &dirent->d_namlen) || | |
857 | __copy_to_user(dirent->d_name, name, namlen) || | |
858 | __put_user(0, dirent->d_name + namlen)) | |
859 | goto efault; | |
860 | return 0; | |
861 | efault: | |
862 | buf->result = -EFAULT; | |
863 | return -EFAULT; | |
864 | } | |
865 | ||
866 | asmlinkage long compat_sys_old_readdir(unsigned int fd, | |
867 | struct compat_old_linux_dirent __user *dirent, unsigned int count) | |
868 | { | |
869 | int error; | |
870 | struct file *file; | |
871 | struct compat_readdir_callback buf; | |
872 | ||
873 | error = -EBADF; | |
874 | file = fget(fd); | |
875 | if (!file) | |
876 | goto out; | |
877 | ||
878 | buf.result = 0; | |
879 | buf.dirent = dirent; | |
880 | ||
881 | error = vfs_readdir(file, compat_fillonedir, &buf); | |
53c9c5c0 | 882 | if (buf.result) |
1da177e4 LT |
883 | error = buf.result; |
884 | ||
885 | fput(file); | |
886 | out: | |
887 | return error; | |
888 | } | |
889 | ||
890 | struct compat_linux_dirent { | |
891 | compat_ulong_t d_ino; | |
892 | compat_ulong_t d_off; | |
893 | unsigned short d_reclen; | |
894 | char d_name[1]; | |
895 | }; | |
896 | ||
897 | struct compat_getdents_callback { | |
898 | struct compat_linux_dirent __user *current_dir; | |
899 | struct compat_linux_dirent __user *previous; | |
900 | int count; | |
901 | int error; | |
902 | }; | |
903 | ||
904 | static int compat_filldir(void *__buf, const char *name, int namlen, | |
afefdbb2 | 905 | loff_t offset, u64 ino, unsigned int d_type) |
1da177e4 LT |
906 | { |
907 | struct compat_linux_dirent __user * dirent; | |
908 | struct compat_getdents_callback *buf = __buf; | |
afefdbb2 | 909 | compat_ulong_t d_ino; |
022a1692 | 910 | int reclen = ALIGN(NAME_OFFSET(dirent) + namlen + 2, sizeof(compat_long_t)); |
1da177e4 LT |
911 | |
912 | buf->error = -EINVAL; /* only used if we fail.. */ | |
913 | if (reclen > buf->count) | |
914 | return -EINVAL; | |
afefdbb2 | 915 | d_ino = ino; |
8f3f655d AV |
916 | if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) { |
917 | buf->error = -EOVERFLOW; | |
afefdbb2 | 918 | return -EOVERFLOW; |
8f3f655d | 919 | } |
1da177e4 LT |
920 | dirent = buf->previous; |
921 | if (dirent) { | |
922 | if (__put_user(offset, &dirent->d_off)) | |
923 | goto efault; | |
924 | } | |
925 | dirent = buf->current_dir; | |
afefdbb2 | 926 | if (__put_user(d_ino, &dirent->d_ino)) |
1da177e4 LT |
927 | goto efault; |
928 | if (__put_user(reclen, &dirent->d_reclen)) | |
929 | goto efault; | |
930 | if (copy_to_user(dirent->d_name, name, namlen)) | |
931 | goto efault; | |
932 | if (__put_user(0, dirent->d_name + namlen)) | |
933 | goto efault; | |
934 | if (__put_user(d_type, (char __user *) dirent + reclen - 1)) | |
935 | goto efault; | |
936 | buf->previous = dirent; | |
937 | dirent = (void __user *)dirent + reclen; | |
938 | buf->current_dir = dirent; | |
939 | buf->count -= reclen; | |
940 | return 0; | |
941 | efault: | |
942 | buf->error = -EFAULT; | |
943 | return -EFAULT; | |
944 | } | |
945 | ||
946 | asmlinkage long compat_sys_getdents(unsigned int fd, | |
947 | struct compat_linux_dirent __user *dirent, unsigned int count) | |
948 | { | |
949 | struct file * file; | |
950 | struct compat_linux_dirent __user * lastdirent; | |
951 | struct compat_getdents_callback buf; | |
952 | int error; | |
953 | ||
954 | error = -EFAULT; | |
955 | if (!access_ok(VERIFY_WRITE, dirent, count)) | |
956 | goto out; | |
957 | ||
958 | error = -EBADF; | |
959 | file = fget(fd); | |
960 | if (!file) | |
961 | goto out; | |
962 | ||
963 | buf.current_dir = dirent; | |
964 | buf.previous = NULL; | |
965 | buf.count = count; | |
966 | buf.error = 0; | |
967 | ||
968 | error = vfs_readdir(file, compat_filldir, &buf); | |
53c9c5c0 AV |
969 | if (error >= 0) |
970 | error = buf.error; | |
1da177e4 LT |
971 | lastdirent = buf.previous; |
972 | if (lastdirent) { | |
973 | if (put_user(file->f_pos, &lastdirent->d_off)) | |
974 | error = -EFAULT; | |
975 | else | |
976 | error = count - buf.count; | |
977 | } | |
1da177e4 LT |
978 | fput(file); |
979 | out: | |
980 | return error; | |
981 | } | |
982 | ||
983 | #ifndef __ARCH_OMIT_COMPAT_SYS_GETDENTS64 | |
1da177e4 LT |
984 | |
985 | struct compat_getdents_callback64 { | |
986 | struct linux_dirent64 __user *current_dir; | |
987 | struct linux_dirent64 __user *previous; | |
988 | int count; | |
989 | int error; | |
990 | }; | |
991 | ||
992 | static int compat_filldir64(void * __buf, const char * name, int namlen, loff_t offset, | |
afefdbb2 | 993 | u64 ino, unsigned int d_type) |
1da177e4 LT |
994 | { |
995 | struct linux_dirent64 __user *dirent; | |
996 | struct compat_getdents_callback64 *buf = __buf; | |
997 | int jj = NAME_OFFSET(dirent); | |
022a1692 | 998 | int reclen = ALIGN(jj + namlen + 1, sizeof(u64)); |
1da177e4 LT |
999 | u64 off; |
1000 | ||
1001 | buf->error = -EINVAL; /* only used if we fail.. */ | |
1002 | if (reclen > buf->count) | |
1003 | return -EINVAL; | |
1004 | dirent = buf->previous; | |
1005 | ||
1006 | if (dirent) { | |
1007 | if (__put_user_unaligned(offset, &dirent->d_off)) | |
1008 | goto efault; | |
1009 | } | |
1010 | dirent = buf->current_dir; | |
1011 | if (__put_user_unaligned(ino, &dirent->d_ino)) | |
1012 | goto efault; | |
1013 | off = 0; | |
1014 | if (__put_user_unaligned(off, &dirent->d_off)) | |
1015 | goto efault; | |
1016 | if (__put_user(reclen, &dirent->d_reclen)) | |
1017 | goto efault; | |
1018 | if (__put_user(d_type, &dirent->d_type)) | |
1019 | goto efault; | |
1020 | if (copy_to_user(dirent->d_name, name, namlen)) | |
1021 | goto efault; | |
1022 | if (__put_user(0, dirent->d_name + namlen)) | |
1023 | goto efault; | |
1024 | buf->previous = dirent; | |
1025 | dirent = (void __user *)dirent + reclen; | |
1026 | buf->current_dir = dirent; | |
1027 | buf->count -= reclen; | |
1028 | return 0; | |
1029 | efault: | |
1030 | buf->error = -EFAULT; | |
1031 | return -EFAULT; | |
1032 | } | |
1033 | ||
1034 | asmlinkage long compat_sys_getdents64(unsigned int fd, | |
1035 | struct linux_dirent64 __user * dirent, unsigned int count) | |
1036 | { | |
1037 | struct file * file; | |
1038 | struct linux_dirent64 __user * lastdirent; | |
1039 | struct compat_getdents_callback64 buf; | |
1040 | int error; | |
1041 | ||
1042 | error = -EFAULT; | |
1043 | if (!access_ok(VERIFY_WRITE, dirent, count)) | |
1044 | goto out; | |
1045 | ||
1046 | error = -EBADF; | |
1047 | file = fget(fd); | |
1048 | if (!file) | |
1049 | goto out; | |
1050 | ||
1051 | buf.current_dir = dirent; | |
1052 | buf.previous = NULL; | |
1053 | buf.count = count; | |
1054 | buf.error = 0; | |
1055 | ||
1056 | error = vfs_readdir(file, compat_filldir64, &buf); | |
53c9c5c0 AV |
1057 | if (error >= 0) |
1058 | error = buf.error; | |
1da177e4 LT |
1059 | lastdirent = buf.previous; |
1060 | if (lastdirent) { | |
1061 | typeof(lastdirent->d_off) d_off = file->f_pos; | |
7116e994 | 1062 | if (__put_user_unaligned(d_off, &lastdirent->d_off)) |
53c9c5c0 AV |
1063 | error = -EFAULT; |
1064 | else | |
1065 | error = count - buf.count; | |
1da177e4 | 1066 | } |
1da177e4 LT |
1067 | fput(file); |
1068 | out: | |
1069 | return error; | |
1070 | } | |
1071 | #endif /* ! __ARCH_OMIT_COMPAT_SYS_GETDENTS64 */ | |
1072 | ||
1073 | static ssize_t compat_do_readv_writev(int type, struct file *file, | |
1074 | const struct compat_iovec __user *uvector, | |
1075 | unsigned long nr_segs, loff_t *pos) | |
1076 | { | |
1da177e4 LT |
1077 | compat_ssize_t tot_len; |
1078 | struct iovec iovstack[UIO_FASTIOV]; | |
1079 | struct iovec *iov=iovstack, *vector; | |
1080 | ssize_t ret; | |
1081 | int seg; | |
1082 | io_fn_t fn; | |
1083 | iov_fn_t fnv; | |
1084 | ||
1085 | /* | |
1086 | * SuS says "The readv() function *may* fail if the iovcnt argument | |
1087 | * was less than or equal to 0, or greater than {IOV_MAX}. Linux has | |
1088 | * traditionally returned zero for zero segments, so... | |
1089 | */ | |
1090 | ret = 0; | |
1091 | if (nr_segs == 0) | |
1092 | goto out; | |
1093 | ||
1094 | /* | |
1095 | * First get the "struct iovec" from user memory and | |
1096 | * verify all the pointers | |
1097 | */ | |
1098 | ret = -EINVAL; | |
1099 | if ((nr_segs > UIO_MAXIOV) || (nr_segs <= 0)) | |
1100 | goto out; | |
1101 | if (!file->f_op) | |
1102 | goto out; | |
1103 | if (nr_segs > UIO_FASTIOV) { | |
1104 | ret = -ENOMEM; | |
1105 | iov = kmalloc(nr_segs*sizeof(struct iovec), GFP_KERNEL); | |
1106 | if (!iov) | |
1107 | goto out; | |
1108 | } | |
1109 | ret = -EFAULT; | |
1110 | if (!access_ok(VERIFY_READ, uvector, nr_segs*sizeof(*uvector))) | |
1111 | goto out; | |
1112 | ||
1113 | /* | |
1114 | * Single unix specification: | |
1115 | * We should -EINVAL if an element length is not >= 0 and fitting an | |
1116 | * ssize_t. The total length is fitting an ssize_t | |
1117 | * | |
1118 | * Be careful here because iov_len is a size_t not an ssize_t | |
1119 | */ | |
1120 | tot_len = 0; | |
1121 | vector = iov; | |
1122 | ret = -EINVAL; | |
1123 | for (seg = 0 ; seg < nr_segs; seg++) { | |
1124 | compat_ssize_t tmp = tot_len; | |
1125 | compat_ssize_t len; | |
1126 | compat_uptr_t buf; | |
1127 | ||
1128 | if (__get_user(len, &uvector->iov_len) || | |
1129 | __get_user(buf, &uvector->iov_base)) { | |
1130 | ret = -EFAULT; | |
1131 | goto out; | |
1132 | } | |
1133 | if (len < 0) /* size_t not fitting an compat_ssize_t .. */ | |
1134 | goto out; | |
1135 | tot_len += len; | |
1136 | if (tot_len < tmp) /* maths overflow on the compat_ssize_t */ | |
1137 | goto out; | |
1138 | vector->iov_base = compat_ptr(buf); | |
1139 | vector->iov_len = (compat_size_t) len; | |
1140 | uvector++; | |
1141 | vector++; | |
1142 | } | |
1143 | if (tot_len == 0) { | |
1144 | ret = 0; | |
1145 | goto out; | |
1146 | } | |
1147 | ||
1148 | ret = rw_verify_area(type, file, pos, tot_len); | |
e28cc715 | 1149 | if (ret < 0) |
1da177e4 LT |
1150 | goto out; |
1151 | ||
1152 | fnv = NULL; | |
1153 | if (type == READ) { | |
1154 | fn = file->f_op->read; | |
ee0b3e67 | 1155 | fnv = file->f_op->aio_read; |
1da177e4 LT |
1156 | } else { |
1157 | fn = (io_fn_t)file->f_op->write; | |
ee0b3e67 | 1158 | fnv = file->f_op->aio_write; |
1da177e4 LT |
1159 | } |
1160 | ||
ee0b3e67 BP |
1161 | if (fnv) |
1162 | ret = do_sync_readv_writev(file, iov, nr_segs, tot_len, | |
1163 | pos, fnv); | |
1164 | else | |
1165 | ret = do_loop_readv_writev(file, iov, nr_segs, pos, fn); | |
1da177e4 | 1166 | |
1da177e4 LT |
1167 | out: |
1168 | if (iov != iovstack) | |
1169 | kfree(iov); | |
0eeca283 | 1170 | if ((ret + (type == READ)) > 0) { |
0f7fc9e4 | 1171 | struct dentry *dentry = file->f_path.dentry; |
0eeca283 RL |
1172 | if (type == READ) |
1173 | fsnotify_access(dentry); | |
1174 | else | |
1175 | fsnotify_modify(dentry); | |
1176 | } | |
1da177e4 LT |
1177 | return ret; |
1178 | } | |
1179 | ||
dac12138 GH |
1180 | static size_t compat_readv(struct file *file, |
1181 | const struct compat_iovec __user *vec, | |
1182 | unsigned long vlen, loff_t *pos) | |
1da177e4 | 1183 | { |
1da177e4 LT |
1184 | ssize_t ret = -EBADF; |
1185 | ||
1da177e4 LT |
1186 | if (!(file->f_mode & FMODE_READ)) |
1187 | goto out; | |
1188 | ||
1189 | ret = -EINVAL; | |
ee0b3e67 | 1190 | if (!file->f_op || (!file->f_op->aio_read && !file->f_op->read)) |
1da177e4 LT |
1191 | goto out; |
1192 | ||
dac12138 | 1193 | ret = compat_do_readv_writev(READ, file, vec, vlen, pos); |
1da177e4 LT |
1194 | |
1195 | out: | |
ca8a5bd2 GH |
1196 | if (ret > 0) |
1197 | add_rchar(current, ret); | |
1198 | inc_syscr(current); | |
dac12138 GH |
1199 | return ret; |
1200 | } | |
1201 | ||
1202 | asmlinkage ssize_t | |
1203 | compat_sys_readv(unsigned long fd, const struct compat_iovec __user *vec, | |
1204 | unsigned long vlen) | |
1205 | { | |
1206 | struct file *file; | |
10c7db27 | 1207 | int fput_needed; |
dac12138 GH |
1208 | ssize_t ret; |
1209 | ||
10c7db27 | 1210 | file = fget_light(fd, &fput_needed); |
dac12138 GH |
1211 | if (!file) |
1212 | return -EBADF; | |
1213 | ret = compat_readv(file, vec, vlen, &file->f_pos); | |
10c7db27 | 1214 | fput_light(file, fput_needed); |
1da177e4 LT |
1215 | return ret; |
1216 | } | |
1217 | ||
f3554f4b GH |
1218 | asmlinkage ssize_t |
1219 | compat_sys_preadv(unsigned long fd, const struct compat_iovec __user *vec, | |
601cc11d | 1220 | unsigned long vlen, u32 pos_low, u32 pos_high) |
f3554f4b GH |
1221 | { |
1222 | loff_t pos = ((loff_t)pos_high << 32) | pos_low; | |
1223 | struct file *file; | |
10c7db27 | 1224 | int fput_needed; |
f3554f4b GH |
1225 | ssize_t ret; |
1226 | ||
1227 | if (pos < 0) | |
1228 | return -EINVAL; | |
10c7db27 | 1229 | file = fget_light(fd, &fput_needed); |
f3554f4b GH |
1230 | if (!file) |
1231 | return -EBADF; | |
1232 | ret = compat_readv(file, vec, vlen, &pos); | |
10c7db27 | 1233 | fput_light(file, fput_needed); |
f3554f4b GH |
1234 | return ret; |
1235 | } | |
1236 | ||
6949a631 GH |
1237 | static size_t compat_writev(struct file *file, |
1238 | const struct compat_iovec __user *vec, | |
1239 | unsigned long vlen, loff_t *pos) | |
1da177e4 | 1240 | { |
1da177e4 LT |
1241 | ssize_t ret = -EBADF; |
1242 | ||
1da177e4 LT |
1243 | if (!(file->f_mode & FMODE_WRITE)) |
1244 | goto out; | |
1245 | ||
1246 | ret = -EINVAL; | |
ee0b3e67 | 1247 | if (!file->f_op || (!file->f_op->aio_write && !file->f_op->write)) |
1da177e4 LT |
1248 | goto out; |
1249 | ||
6949a631 | 1250 | ret = compat_do_readv_writev(WRITE, file, vec, vlen, pos); |
1da177e4 LT |
1251 | |
1252 | out: | |
ca8a5bd2 GH |
1253 | if (ret > 0) |
1254 | add_wchar(current, ret); | |
1255 | inc_syscw(current); | |
6949a631 GH |
1256 | return ret; |
1257 | } | |
1258 | ||
1259 | asmlinkage ssize_t | |
1260 | compat_sys_writev(unsigned long fd, const struct compat_iovec __user *vec, | |
1261 | unsigned long vlen) | |
1262 | { | |
1263 | struct file *file; | |
10c7db27 | 1264 | int fput_needed; |
6949a631 GH |
1265 | ssize_t ret; |
1266 | ||
10c7db27 | 1267 | file = fget_light(fd, &fput_needed); |
6949a631 GH |
1268 | if (!file) |
1269 | return -EBADF; | |
1270 | ret = compat_writev(file, vec, vlen, &file->f_pos); | |
10c7db27 | 1271 | fput_light(file, fput_needed); |
1da177e4 LT |
1272 | return ret; |
1273 | } | |
1274 | ||
f3554f4b GH |
1275 | asmlinkage ssize_t |
1276 | compat_sys_pwritev(unsigned long fd, const struct compat_iovec __user *vec, | |
601cc11d | 1277 | unsigned long vlen, u32 pos_low, u32 pos_high) |
f3554f4b GH |
1278 | { |
1279 | loff_t pos = ((loff_t)pos_high << 32) | pos_low; | |
1280 | struct file *file; | |
10c7db27 | 1281 | int fput_needed; |
f3554f4b GH |
1282 | ssize_t ret; |
1283 | ||
1284 | if (pos < 0) | |
1285 | return -EINVAL; | |
10c7db27 | 1286 | file = fget_light(fd, &fput_needed); |
f3554f4b GH |
1287 | if (!file) |
1288 | return -EBADF; | |
1289 | ret = compat_writev(file, vec, vlen, &pos); | |
10c7db27 | 1290 | fput_light(file, fput_needed); |
f3554f4b GH |
1291 | return ret; |
1292 | } | |
1293 | ||
d2610202 AK |
1294 | asmlinkage long |
1295 | compat_sys_vmsplice(int fd, const struct compat_iovec __user *iov32, | |
1296 | unsigned int nr_segs, unsigned int flags) | |
1297 | { | |
1298 | unsigned i; | |
90cbad65 | 1299 | struct iovec __user *iov; |
98232d50 | 1300 | if (nr_segs > UIO_MAXIOV) |
d2610202 AK |
1301 | return -EINVAL; |
1302 | iov = compat_alloc_user_space(nr_segs * sizeof(struct iovec)); | |
1303 | for (i = 0; i < nr_segs; i++) { | |
1304 | struct compat_iovec v; | |
1305 | if (get_user(v.iov_base, &iov32[i].iov_base) || | |
1306 | get_user(v.iov_len, &iov32[i].iov_len) || | |
1307 | put_user(compat_ptr(v.iov_base), &iov[i].iov_base) || | |
1308 | put_user(v.iov_len, &iov[i].iov_len)) | |
1309 | return -EFAULT; | |
1310 | } | |
1311 | return sys_vmsplice(fd, iov, nr_segs, flags); | |
1312 | } | |
1313 | ||
e922efc3 MS |
1314 | /* |
1315 | * Exactly like fs/open.c:sys_open(), except that it doesn't set the | |
1316 | * O_LARGEFILE flag. | |
1317 | */ | |
1318 | asmlinkage long | |
1319 | compat_sys_open(const char __user *filename, int flags, int mode) | |
1320 | { | |
5590ff0d UD |
1321 | return do_sys_open(AT_FDCWD, filename, flags, mode); |
1322 | } | |
1323 | ||
1324 | /* | |
1325 | * Exactly like fs/open.c:sys_openat(), except that it doesn't set the | |
1326 | * O_LARGEFILE flag. | |
1327 | */ | |
1328 | asmlinkage long | |
9ad11ab4 | 1329 | compat_sys_openat(unsigned int dfd, const char __user *filename, int flags, int mode) |
5590ff0d UD |
1330 | { |
1331 | return do_sys_open(dfd, filename, flags, mode); | |
e922efc3 MS |
1332 | } |
1333 | ||
1da177e4 LT |
1334 | /* |
1335 | * compat_count() counts the number of arguments/envelopes. It is basically | |
1336 | * a copy of count() from fs/exec.c, except that it works with 32 bit argv | |
1337 | * and envp pointers. | |
1338 | */ | |
1339 | static int compat_count(compat_uptr_t __user *argv, int max) | |
1340 | { | |
1341 | int i = 0; | |
1342 | ||
1343 | if (argv != NULL) { | |
1344 | for (;;) { | |
1345 | compat_uptr_t p; | |
1346 | ||
1347 | if (get_user(p, argv)) | |
1348 | return -EFAULT; | |
1349 | if (!p) | |
1350 | break; | |
1351 | argv++; | |
362e6663 | 1352 | if (i++ >= max) |
1da177e4 LT |
1353 | return -E2BIG; |
1354 | } | |
1355 | } | |
1356 | return i; | |
1357 | } | |
1358 | ||
1359 | /* | |
1360 | * compat_copy_strings() is basically a copy of copy_strings() from fs/exec.c | |
1361 | * except that it works with 32 bit argv and envp pointers. | |
1362 | */ | |
1363 | static int compat_copy_strings(int argc, compat_uptr_t __user *argv, | |
1364 | struct linux_binprm *bprm) | |
1365 | { | |
1366 | struct page *kmapped_page = NULL; | |
1367 | char *kaddr = NULL; | |
b6a2fea3 | 1368 | unsigned long kpos = 0; |
1da177e4 LT |
1369 | int ret; |
1370 | ||
1371 | while (argc-- > 0) { | |
1372 | compat_uptr_t str; | |
1373 | int len; | |
1374 | unsigned long pos; | |
1375 | ||
1376 | if (get_user(str, argv+argc) || | |
b6a2fea3 | 1377 | !(len = strnlen_user(compat_ptr(str), MAX_ARG_STRLEN))) { |
1da177e4 LT |
1378 | ret = -EFAULT; |
1379 | goto out; | |
1380 | } | |
1381 | ||
b6a2fea3 | 1382 | if (len > MAX_ARG_STRLEN) { |
1da177e4 LT |
1383 | ret = -E2BIG; |
1384 | goto out; | |
1385 | } | |
1386 | ||
b6a2fea3 | 1387 | /* We're going to work our way backwords. */ |
1da177e4 | 1388 | pos = bprm->p; |
b6a2fea3 OW |
1389 | str += len; |
1390 | bprm->p -= len; | |
1da177e4 LT |
1391 | |
1392 | while (len > 0) { | |
1da177e4 | 1393 | int offset, bytes_to_copy; |
1da177e4 LT |
1394 | |
1395 | offset = pos % PAGE_SIZE; | |
b6a2fea3 OW |
1396 | if (offset == 0) |
1397 | offset = PAGE_SIZE; | |
1398 | ||
1399 | bytes_to_copy = offset; | |
1400 | if (bytes_to_copy > len) | |
1401 | bytes_to_copy = len; | |
1402 | ||
1403 | offset -= bytes_to_copy; | |
1404 | pos -= bytes_to_copy; | |
1405 | str -= bytes_to_copy; | |
1406 | len -= bytes_to_copy; | |
1407 | ||
1408 | if (!kmapped_page || kpos != (pos & PAGE_MASK)) { | |
1409 | struct page *page; | |
1410 | ||
1411 | #ifdef CONFIG_STACK_GROWSUP | |
1412 | ret = expand_stack_downwards(bprm->vma, pos); | |
1413 | if (ret < 0) { | |
1414 | /* We've exceed the stack rlimit. */ | |
1415 | ret = -E2BIG; | |
1416 | goto out; | |
1417 | } | |
1418 | #endif | |
1419 | ret = get_user_pages(current, bprm->mm, pos, | |
1420 | 1, 1, 1, &page, NULL); | |
1421 | if (ret <= 0) { | |
1422 | /* We've exceed the stack rlimit. */ | |
1423 | ret = -E2BIG; | |
1da177e4 LT |
1424 | goto out; |
1425 | } | |
1da177e4 | 1426 | |
b6a2fea3 OW |
1427 | if (kmapped_page) { |
1428 | flush_kernel_dcache_page(kmapped_page); | |
1da177e4 | 1429 | kunmap(kmapped_page); |
b6a2fea3 OW |
1430 | put_page(kmapped_page); |
1431 | } | |
1da177e4 LT |
1432 | kmapped_page = page; |
1433 | kaddr = kmap(kmapped_page); | |
b6a2fea3 OW |
1434 | kpos = pos & PAGE_MASK; |
1435 | flush_cache_page(bprm->vma, kpos, | |
1436 | page_to_pfn(kmapped_page)); | |
1da177e4 | 1437 | } |
b6a2fea3 OW |
1438 | if (copy_from_user(kaddr+offset, compat_ptr(str), |
1439 | bytes_to_copy)) { | |
1da177e4 LT |
1440 | ret = -EFAULT; |
1441 | goto out; | |
1442 | } | |
1da177e4 LT |
1443 | } |
1444 | } | |
1445 | ret = 0; | |
1446 | out: | |
b6a2fea3 OW |
1447 | if (kmapped_page) { |
1448 | flush_kernel_dcache_page(kmapped_page); | |
1da177e4 | 1449 | kunmap(kmapped_page); |
b6a2fea3 | 1450 | put_page(kmapped_page); |
1da177e4 | 1451 | } |
b6a2fea3 | 1452 | return ret; |
1da177e4 LT |
1453 | } |
1454 | ||
1da177e4 LT |
1455 | /* |
1456 | * compat_do_execve() is mostly a copy of do_execve(), with the exception | |
1457 | * that it processes 32 bit argv and envp pointers. | |
1458 | */ | |
1459 | int compat_do_execve(char * filename, | |
1460 | compat_uptr_t __user *argv, | |
1461 | compat_uptr_t __user *envp, | |
1462 | struct pt_regs * regs) | |
1463 | { | |
1464 | struct linux_binprm *bprm; | |
1465 | struct file *file; | |
53e9309e | 1466 | struct files_struct *displaced; |
8c652f96 | 1467 | bool clear_in_exec; |
1da177e4 | 1468 | int retval; |
1da177e4 | 1469 | |
53e9309e HD |
1470 | retval = unshare_files(&displaced); |
1471 | if (retval) | |
1472 | goto out_ret; | |
1473 | ||
1da177e4 | 1474 | retval = -ENOMEM; |
11b0b5ab | 1475 | bprm = kzalloc(sizeof(*bprm), GFP_KERNEL); |
1da177e4 | 1476 | if (!bprm) |
53e9309e | 1477 | goto out_files; |
1da177e4 | 1478 | |
a2a8474c ON |
1479 | retval = prepare_bprm_creds(bprm); |
1480 | if (retval) | |
a6f76f23 | 1481 | goto out_free; |
498052bb AV |
1482 | |
1483 | retval = check_unsafe_exec(bprm); | |
8c652f96 | 1484 | if (retval < 0) |
a2a8474c | 1485 | goto out_free; |
8c652f96 | 1486 | clear_in_exec = retval; |
a2a8474c | 1487 | current->in_execve = 1; |
a6f76f23 | 1488 | |
1da177e4 LT |
1489 | file = open_exec(filename); |
1490 | retval = PTR_ERR(file); | |
1491 | if (IS_ERR(file)) | |
498052bb | 1492 | goto out_unmark; |
1da177e4 LT |
1493 | |
1494 | sched_exec(); | |
1495 | ||
1da177e4 LT |
1496 | bprm->file = file; |
1497 | bprm->filename = filename; | |
1498 | bprm->interp = filename; | |
1da177e4 | 1499 | |
b6a2fea3 OW |
1500 | retval = bprm_mm_init(bprm); |
1501 | if (retval) | |
1502 | goto out_file; | |
1da177e4 | 1503 | |
b6a2fea3 | 1504 | bprm->argc = compat_count(argv, MAX_ARG_STRINGS); |
1da177e4 | 1505 | if ((retval = bprm->argc) < 0) |
a6f76f23 | 1506 | goto out; |
1da177e4 | 1507 | |
b6a2fea3 | 1508 | bprm->envc = compat_count(envp, MAX_ARG_STRINGS); |
1da177e4 | 1509 | if ((retval = bprm->envc) < 0) |
1da177e4 LT |
1510 | goto out; |
1511 | ||
1512 | retval = prepare_binprm(bprm); | |
1513 | if (retval < 0) | |
1514 | goto out; | |
1515 | ||
1516 | retval = copy_strings_kernel(1, &bprm->filename, bprm); | |
1517 | if (retval < 0) | |
1518 | goto out; | |
1519 | ||
1520 | bprm->exec = bprm->p; | |
1521 | retval = compat_copy_strings(bprm->envc, envp, bprm); | |
1522 | if (retval < 0) | |
1523 | goto out; | |
1524 | ||
1525 | retval = compat_copy_strings(bprm->argc, argv, bprm); | |
1526 | if (retval < 0) | |
1527 | goto out; | |
1528 | ||
1529 | retval = search_binary_handler(bprm, regs); | |
a6f76f23 DH |
1530 | if (retval < 0) |
1531 | goto out; | |
1da177e4 | 1532 | |
89240ba0 SS |
1533 | current->stack_start = current->mm->start_stack; |
1534 | ||
a6f76f23 | 1535 | /* execve succeeded */ |
498052bb | 1536 | current->fs->in_exec = 0; |
f9ce1f1c | 1537 | current->in_execve = 0; |
a6f76f23 DH |
1538 | acct_update_integrals(current); |
1539 | free_bprm(bprm); | |
53e9309e HD |
1540 | if (displaced) |
1541 | put_files_struct(displaced); | |
a6f76f23 | 1542 | return retval; |
1da177e4 | 1543 | |
a6f76f23 | 1544 | out: |
1da177e4 | 1545 | if (bprm->mm) |
b6a2fea3 | 1546 | mmput(bprm->mm); |
1da177e4 LT |
1547 | |
1548 | out_file: | |
1549 | if (bprm->file) { | |
1550 | allow_write_access(bprm->file); | |
1551 | fput(bprm->file); | |
1552 | } | |
1553 | ||
498052bb | 1554 | out_unmark: |
8c652f96 ON |
1555 | if (clear_in_exec) |
1556 | current->fs->in_exec = 0; | |
f9ce1f1c | 1557 | current->in_execve = 0; |
a6f76f23 DH |
1558 | |
1559 | out_free: | |
08a6fac1 | 1560 | free_bprm(bprm); |
1da177e4 | 1561 | |
53e9309e HD |
1562 | out_files: |
1563 | if (displaced) | |
1564 | reset_files_struct(displaced); | |
1da177e4 LT |
1565 | out_ret: |
1566 | return retval; | |
1567 | } | |
1568 | ||
1569 | #define __COMPAT_NFDBITS (8 * sizeof(compat_ulong_t)) | |
1570 | ||
b773ad40 TG |
1571 | static int poll_select_copy_remaining(struct timespec *end_time, void __user *p, |
1572 | int timeval, int ret) | |
1573 | { | |
1574 | struct timespec ts; | |
1575 | ||
1576 | if (!p) | |
1577 | return ret; | |
1578 | ||
1579 | if (current->personality & STICKY_TIMEOUTS) | |
1580 | goto sticky; | |
1581 | ||
1582 | /* No update for zero timeout */ | |
1583 | if (!end_time->tv_sec && !end_time->tv_nsec) | |
1584 | return ret; | |
1585 | ||
1586 | ktime_get_ts(&ts); | |
1587 | ts = timespec_sub(*end_time, ts); | |
1588 | if (ts.tv_sec < 0) | |
1589 | ts.tv_sec = ts.tv_nsec = 0; | |
1590 | ||
1591 | if (timeval) { | |
1592 | struct compat_timeval rtv; | |
1593 | ||
1594 | rtv.tv_sec = ts.tv_sec; | |
1595 | rtv.tv_usec = ts.tv_nsec / NSEC_PER_USEC; | |
1596 | ||
1597 | if (!copy_to_user(p, &rtv, sizeof(rtv))) | |
1598 | return ret; | |
1599 | } else { | |
1600 | struct compat_timespec rts; | |
1601 | ||
1602 | rts.tv_sec = ts.tv_sec; | |
1603 | rts.tv_nsec = ts.tv_nsec; | |
1604 | ||
1605 | if (!copy_to_user(p, &rts, sizeof(rts))) | |
1606 | return ret; | |
1607 | } | |
1608 | /* | |
1609 | * If an application puts its timeval in read-only memory, we | |
1610 | * don't want the Linux-specific update to the timeval to | |
1611 | * cause a fault after the select has completed | |
1612 | * successfully. However, because we're not updating the | |
1613 | * timeval, we can't restart the system call. | |
1614 | */ | |
1615 | ||
1616 | sticky: | |
1617 | if (ret == -ERESTARTNOHAND) | |
1618 | ret = -EINTR; | |
1619 | return ret; | |
1620 | } | |
1621 | ||
1da177e4 LT |
1622 | /* |
1623 | * Ooo, nasty. We need here to frob 32-bit unsigned longs to | |
1624 | * 64-bit unsigned longs. | |
1625 | */ | |
858119e1 | 1626 | static |
1da177e4 LT |
1627 | int compat_get_fd_set(unsigned long nr, compat_ulong_t __user *ufdset, |
1628 | unsigned long *fdset) | |
1629 | { | |
022a1692 | 1630 | nr = DIV_ROUND_UP(nr, __COMPAT_NFDBITS); |
1da177e4 LT |
1631 | if (ufdset) { |
1632 | unsigned long odd; | |
1633 | ||
1634 | if (!access_ok(VERIFY_WRITE, ufdset, nr*sizeof(compat_ulong_t))) | |
1635 | return -EFAULT; | |
1636 | ||
1637 | odd = nr & 1UL; | |
1638 | nr &= ~1UL; | |
1639 | while (nr) { | |
1640 | unsigned long h, l; | |
7116e994 HC |
1641 | if (__get_user(l, ufdset) || __get_user(h, ufdset+1)) |
1642 | return -EFAULT; | |
1da177e4 LT |
1643 | ufdset += 2; |
1644 | *fdset++ = h << 32 | l; | |
1645 | nr -= 2; | |
1646 | } | |
7116e994 HC |
1647 | if (odd && __get_user(*fdset, ufdset)) |
1648 | return -EFAULT; | |
1da177e4 LT |
1649 | } else { |
1650 | /* Tricky, must clear full unsigned long in the | |
1651 | * kernel fdset at the end, this makes sure that | |
1652 | * actually happens. | |
1653 | */ | |
1654 | memset(fdset, 0, ((nr + 1) & ~1)*sizeof(compat_ulong_t)); | |
1655 | } | |
1656 | return 0; | |
1657 | } | |
1658 | ||
858119e1 | 1659 | static |
7116e994 HC |
1660 | int compat_set_fd_set(unsigned long nr, compat_ulong_t __user *ufdset, |
1661 | unsigned long *fdset) | |
1da177e4 LT |
1662 | { |
1663 | unsigned long odd; | |
022a1692 | 1664 | nr = DIV_ROUND_UP(nr, __COMPAT_NFDBITS); |
1da177e4 LT |
1665 | |
1666 | if (!ufdset) | |
7116e994 | 1667 | return 0; |
1da177e4 LT |
1668 | |
1669 | odd = nr & 1UL; | |
1670 | nr &= ~1UL; | |
1671 | while (nr) { | |
1672 | unsigned long h, l; | |
1673 | l = *fdset++; | |
1674 | h = l >> 32; | |
7116e994 HC |
1675 | if (__put_user(l, ufdset) || __put_user(h, ufdset+1)) |
1676 | return -EFAULT; | |
1da177e4 LT |
1677 | ufdset += 2; |
1678 | nr -= 2; | |
1679 | } | |
7116e994 HC |
1680 | if (odd && __put_user(*fdset, ufdset)) |
1681 | return -EFAULT; | |
1682 | return 0; | |
1da177e4 LT |
1683 | } |
1684 | ||
1685 | ||
1686 | /* | |
1687 | * This is a virtual copy of sys_select from fs/select.c and probably | |
1688 | * should be compared to it from time to time | |
1689 | */ | |
1da177e4 LT |
1690 | |
1691 | /* | |
1692 | * We can actually return ERESTARTSYS instead of EINTR, but I'd | |
1693 | * like to be certain this leads to no problems. So I return | |
1694 | * EINTR just for safety. | |
1695 | * | |
1696 | * Update: ERESTARTSYS breaks at least the xview clock binary, so | |
1697 | * I'm trying ERESTARTNOHAND which restart only when you want to. | |
1698 | */ | |
1699 | #define MAX_SELECT_SECONDS \ | |
1700 | ((unsigned long) (MAX_SCHEDULE_TIMEOUT / HZ)-1) | |
1701 | ||
9f72949f | 1702 | int compat_core_sys_select(int n, compat_ulong_t __user *inp, |
8ff3e8e8 AV |
1703 | compat_ulong_t __user *outp, compat_ulong_t __user *exp, |
1704 | struct timespec *end_time) | |
1da177e4 LT |
1705 | { |
1706 | fd_set_bits fds; | |
6087b2da | 1707 | void *bits; |
bbea9f69 | 1708 | int size, max_fds, ret = -EINVAL; |
a4531edd | 1709 | struct fdtable *fdt; |
6087b2da | 1710 | long stack_fds[SELECT_STACK_ALLOC/sizeof(long)]; |
1da177e4 | 1711 | |
1da177e4 LT |
1712 | if (n < 0) |
1713 | goto out_nofds; | |
1714 | ||
bbea9f69 | 1715 | /* max_fds can increase, so grab it once to avoid race */ |
ac5b8b6f | 1716 | rcu_read_lock(); |
a4531edd | 1717 | fdt = files_fdtable(current->files); |
bbea9f69 | 1718 | max_fds = fdt->max_fds; |
ac5b8b6f | 1719 | rcu_read_unlock(); |
bbea9f69 VL |
1720 | if (n > max_fds) |
1721 | n = max_fds; | |
1da177e4 LT |
1722 | |
1723 | /* | |
1724 | * We need 6 bitmaps (in/out/ex for both incoming and outgoing), | |
1725 | * since we used fdset we need to allocate memory in units of | |
1726 | * long-words. | |
1727 | */ | |
1da177e4 | 1728 | size = FDS_BYTES(n); |
6087b2da BP |
1729 | bits = stack_fds; |
1730 | if (size > sizeof(stack_fds) / 6) { | |
1731 | bits = kmalloc(6 * size, GFP_KERNEL); | |
1732 | ret = -ENOMEM; | |
1733 | if (!bits) | |
1734 | goto out_nofds; | |
1735 | } | |
1da177e4 LT |
1736 | fds.in = (unsigned long *) bits; |
1737 | fds.out = (unsigned long *) (bits + size); | |
1738 | fds.ex = (unsigned long *) (bits + 2*size); | |
1739 | fds.res_in = (unsigned long *) (bits + 3*size); | |
1740 | fds.res_out = (unsigned long *) (bits + 4*size); | |
1741 | fds.res_ex = (unsigned long *) (bits + 5*size); | |
1742 | ||
1743 | if ((ret = compat_get_fd_set(n, inp, fds.in)) || | |
1744 | (ret = compat_get_fd_set(n, outp, fds.out)) || | |
1745 | (ret = compat_get_fd_set(n, exp, fds.ex))) | |
1746 | goto out; | |
1747 | zero_fd_set(n, fds.res_in); | |
1748 | zero_fd_set(n, fds.res_out); | |
1749 | zero_fd_set(n, fds.res_ex); | |
1750 | ||
8ff3e8e8 | 1751 | ret = do_select(n, &fds, end_time); |
1da177e4 LT |
1752 | |
1753 | if (ret < 0) | |
1754 | goto out; | |
1755 | if (!ret) { | |
1756 | ret = -ERESTARTNOHAND; | |
1757 | if (signal_pending(current)) | |
1758 | goto out; | |
1759 | ret = 0; | |
1760 | } | |
1761 | ||
7116e994 HC |
1762 | if (compat_set_fd_set(n, inp, fds.res_in) || |
1763 | compat_set_fd_set(n, outp, fds.res_out) || | |
1764 | compat_set_fd_set(n, exp, fds.res_ex)) | |
1765 | ret = -EFAULT; | |
1da177e4 | 1766 | out: |
6087b2da BP |
1767 | if (bits != stack_fds) |
1768 | kfree(bits); | |
1da177e4 LT |
1769 | out_nofds: |
1770 | return ret; | |
1771 | } | |
1772 | ||
9f72949f DW |
1773 | asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp, |
1774 | compat_ulong_t __user *outp, compat_ulong_t __user *exp, | |
1775 | struct compat_timeval __user *tvp) | |
1776 | { | |
8ff3e8e8 | 1777 | struct timespec end_time, *to = NULL; |
9f72949f DW |
1778 | struct compat_timeval tv; |
1779 | int ret; | |
1780 | ||
1781 | if (tvp) { | |
1782 | if (copy_from_user(&tv, tvp, sizeof(tv))) | |
1783 | return -EFAULT; | |
1784 | ||
8ff3e8e8 | 1785 | to = &end_time; |
4d36a9e6 AV |
1786 | if (poll_select_set_timeout(to, |
1787 | tv.tv_sec + (tv.tv_usec / USEC_PER_SEC), | |
1788 | (tv.tv_usec % USEC_PER_SEC) * NSEC_PER_USEC)) | |
9f72949f | 1789 | return -EINVAL; |
9f72949f DW |
1790 | } |
1791 | ||
8ff3e8e8 AV |
1792 | ret = compat_core_sys_select(n, inp, outp, exp, to); |
1793 | ret = poll_select_copy_remaining(&end_time, tvp, 1, ret); | |
9f72949f DW |
1794 | |
1795 | return ret; | |
1796 | } | |
1797 | ||
f3de272b | 1798 | #ifdef HAVE_SET_RESTORE_SIGMASK |
c9da9f21 | 1799 | static long do_compat_pselect(int n, compat_ulong_t __user *inp, |
9f72949f DW |
1800 | compat_ulong_t __user *outp, compat_ulong_t __user *exp, |
1801 | struct compat_timespec __user *tsp, compat_sigset_t __user *sigmask, | |
1802 | compat_size_t sigsetsize) | |
1803 | { | |
1804 | compat_sigset_t ss32; | |
1805 | sigset_t ksigmask, sigsaved; | |
9f72949f | 1806 | struct compat_timespec ts; |
8ff3e8e8 | 1807 | struct timespec end_time, *to = NULL; |
9f72949f DW |
1808 | int ret; |
1809 | ||
1810 | if (tsp) { | |
1811 | if (copy_from_user(&ts, tsp, sizeof(ts))) | |
1812 | return -EFAULT; | |
1813 | ||
8ff3e8e8 AV |
1814 | to = &end_time; |
1815 | if (poll_select_set_timeout(to, ts.tv_sec, ts.tv_nsec)) | |
9f72949f DW |
1816 | return -EINVAL; |
1817 | } | |
1818 | ||
1819 | if (sigmask) { | |
1820 | if (sigsetsize != sizeof(compat_sigset_t)) | |
1821 | return -EINVAL; | |
1822 | if (copy_from_user(&ss32, sigmask, sizeof(ss32))) | |
1823 | return -EFAULT; | |
1824 | sigset_from_compat(&ksigmask, &ss32); | |
1825 | ||
1826 | sigdelsetmask(&ksigmask, sigmask(SIGKILL)|sigmask(SIGSTOP)); | |
1827 | sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved); | |
1828 | } | |
1829 | ||
8ff3e8e8 AV |
1830 | ret = compat_core_sys_select(n, inp, outp, exp, to); |
1831 | ret = poll_select_copy_remaining(&end_time, tsp, 0, ret); | |
9f72949f DW |
1832 | |
1833 | if (ret == -ERESTARTNOHAND) { | |
1834 | /* | |
1835 | * Don't restore the signal mask yet. Let do_signal() deliver | |
1836 | * the signal on the way back to userspace, before the signal | |
1837 | * mask is restored. | |
1838 | */ | |
1839 | if (sigmask) { | |
1840 | memcpy(¤t->saved_sigmask, &sigsaved, | |
1841 | sizeof(sigsaved)); | |
4e4c22c7 | 1842 | set_restore_sigmask(); |
9f72949f DW |
1843 | } |
1844 | } else if (sigmask) | |
1845 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
1846 | ||
1847 | return ret; | |
1848 | } | |
1849 | ||
1850 | asmlinkage long compat_sys_pselect6(int n, compat_ulong_t __user *inp, | |
1851 | compat_ulong_t __user *outp, compat_ulong_t __user *exp, | |
1852 | struct compat_timespec __user *tsp, void __user *sig) | |
1853 | { | |
1854 | compat_size_t sigsetsize = 0; | |
1855 | compat_uptr_t up = 0; | |
1856 | ||
1857 | if (sig) { | |
1858 | if (!access_ok(VERIFY_READ, sig, | |
1859 | sizeof(compat_uptr_t)+sizeof(compat_size_t)) || | |
1860 | __get_user(up, (compat_uptr_t __user *)sig) || | |
1861 | __get_user(sigsetsize, | |
1862 | (compat_size_t __user *)(sig+sizeof(up)))) | |
1863 | return -EFAULT; | |
1864 | } | |
c9da9f21 HC |
1865 | return do_compat_pselect(n, inp, outp, exp, tsp, compat_ptr(up), |
1866 | sigsetsize); | |
9f72949f DW |
1867 | } |
1868 | ||
1869 | asmlinkage long compat_sys_ppoll(struct pollfd __user *ufds, | |
1870 | unsigned int nfds, struct compat_timespec __user *tsp, | |
1871 | const compat_sigset_t __user *sigmask, compat_size_t sigsetsize) | |
1872 | { | |
1873 | compat_sigset_t ss32; | |
1874 | sigset_t ksigmask, sigsaved; | |
1875 | struct compat_timespec ts; | |
8ff3e8e8 | 1876 | struct timespec end_time, *to = NULL; |
9f72949f DW |
1877 | int ret; |
1878 | ||
1879 | if (tsp) { | |
1880 | if (copy_from_user(&ts, tsp, sizeof(ts))) | |
1881 | return -EFAULT; | |
1882 | ||
8ff3e8e8 AV |
1883 | to = &end_time; |
1884 | if (poll_select_set_timeout(to, ts.tv_sec, ts.tv_nsec)) | |
1885 | return -EINVAL; | |
9f72949f DW |
1886 | } |
1887 | ||
1888 | if (sigmask) { | |
3835a9bd | 1889 | if (sigsetsize != sizeof(compat_sigset_t)) |
9f72949f DW |
1890 | return -EINVAL; |
1891 | if (copy_from_user(&ss32, sigmask, sizeof(ss32))) | |
1892 | return -EFAULT; | |
1893 | sigset_from_compat(&ksigmask, &ss32); | |
1894 | ||
1895 | sigdelsetmask(&ksigmask, sigmask(SIGKILL)|sigmask(SIGSTOP)); | |
1896 | sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved); | |
1897 | } | |
1898 | ||
8ff3e8e8 | 1899 | ret = do_sys_poll(ufds, nfds, to); |
9f72949f DW |
1900 | |
1901 | /* We can restart this syscall, usually */ | |
1902 | if (ret == -EINTR) { | |
1903 | /* | |
1904 | * Don't restore the signal mask yet. Let do_signal() deliver | |
1905 | * the signal on the way back to userspace, before the signal | |
1906 | * mask is restored. | |
1907 | */ | |
1908 | if (sigmask) { | |
1909 | memcpy(¤t->saved_sigmask, &sigsaved, | |
1910 | sizeof(sigsaved)); | |
4e4c22c7 | 1911 | set_restore_sigmask(); |
9f72949f DW |
1912 | } |
1913 | ret = -ERESTARTNOHAND; | |
1914 | } else if (sigmask) | |
1915 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
1916 | ||
8ff3e8e8 | 1917 | ret = poll_select_copy_remaining(&end_time, tsp, 0, ret); |
9f72949f DW |
1918 | |
1919 | return ret; | |
1920 | } | |
f3de272b | 1921 | #endif /* HAVE_SET_RESTORE_SIGMASK */ |
9f72949f | 1922 | |
1da177e4 LT |
1923 | #if defined(CONFIG_NFSD) || defined(CONFIG_NFSD_MODULE) |
1924 | /* Stuff for NFS server syscalls... */ | |
1925 | struct compat_nfsctl_svc { | |
1926 | u16 svc32_port; | |
1927 | s32 svc32_nthreads; | |
1928 | }; | |
1929 | ||
1930 | struct compat_nfsctl_client { | |
1931 | s8 cl32_ident[NFSCLNT_IDMAX+1]; | |
1932 | s32 cl32_naddr; | |
1933 | struct in_addr cl32_addrlist[NFSCLNT_ADDRMAX]; | |
1934 | s32 cl32_fhkeytype; | |
1935 | s32 cl32_fhkeylen; | |
1936 | u8 cl32_fhkey[NFSCLNT_KEYMAX]; | |
1937 | }; | |
1938 | ||
1939 | struct compat_nfsctl_export { | |
1940 | char ex32_client[NFSCLNT_IDMAX+1]; | |
1941 | char ex32_path[NFS_MAXPATHLEN+1]; | |
1942 | compat_dev_t ex32_dev; | |
1943 | compat_ino_t ex32_ino; | |
1944 | compat_int_t ex32_flags; | |
202e5979 SR |
1945 | __compat_uid_t ex32_anon_uid; |
1946 | __compat_gid_t ex32_anon_gid; | |
1da177e4 LT |
1947 | }; |
1948 | ||
1949 | struct compat_nfsctl_fdparm { | |
1950 | struct sockaddr gd32_addr; | |
1951 | s8 gd32_path[NFS_MAXPATHLEN+1]; | |
1952 | compat_int_t gd32_version; | |
1953 | }; | |
1954 | ||
1955 | struct compat_nfsctl_fsparm { | |
1956 | struct sockaddr gd32_addr; | |
1957 | s8 gd32_path[NFS_MAXPATHLEN+1]; | |
1958 | compat_int_t gd32_maxlen; | |
1959 | }; | |
1960 | ||
1961 | struct compat_nfsctl_arg { | |
1962 | compat_int_t ca32_version; /* safeguard */ | |
1963 | union { | |
1964 | struct compat_nfsctl_svc u32_svc; | |
1965 | struct compat_nfsctl_client u32_client; | |
1966 | struct compat_nfsctl_export u32_export; | |
1967 | struct compat_nfsctl_fdparm u32_getfd; | |
1968 | struct compat_nfsctl_fsparm u32_getfs; | |
1969 | } u; | |
1970 | #define ca32_svc u.u32_svc | |
1971 | #define ca32_client u.u32_client | |
1972 | #define ca32_export u.u32_export | |
1973 | #define ca32_getfd u.u32_getfd | |
1974 | #define ca32_getfs u.u32_getfs | |
1975 | }; | |
1976 | ||
1977 | union compat_nfsctl_res { | |
1978 | __u8 cr32_getfh[NFS_FHSIZE]; | |
1979 | struct knfsd_fh cr32_getfs; | |
1980 | }; | |
1981 | ||
d64b1c87 LFS |
1982 | static int compat_nfs_svc_trans(struct nfsctl_arg *karg, |
1983 | struct compat_nfsctl_arg __user *arg) | |
1da177e4 | 1984 | { |
d64b1c87 LFS |
1985 | if (!access_ok(VERIFY_READ, &arg->ca32_svc, sizeof(arg->ca32_svc)) || |
1986 | get_user(karg->ca_version, &arg->ca32_version) || | |
1987 | __get_user(karg->ca_svc.svc_port, &arg->ca32_svc.svc32_port) || | |
1988 | __get_user(karg->ca_svc.svc_nthreads, | |
1989 | &arg->ca32_svc.svc32_nthreads)) | |
1990 | return -EFAULT; | |
1991 | return 0; | |
1da177e4 LT |
1992 | } |
1993 | ||
d64b1c87 LFS |
1994 | static int compat_nfs_clnt_trans(struct nfsctl_arg *karg, |
1995 | struct compat_nfsctl_arg __user *arg) | |
1da177e4 | 1996 | { |
d64b1c87 LFS |
1997 | if (!access_ok(VERIFY_READ, &arg->ca32_client, |
1998 | sizeof(arg->ca32_client)) || | |
1999 | get_user(karg->ca_version, &arg->ca32_version) || | |
2000 | __copy_from_user(&karg->ca_client.cl_ident[0], | |
2001 | &arg->ca32_client.cl32_ident[0], | |
2002 | NFSCLNT_IDMAX) || | |
2003 | __get_user(karg->ca_client.cl_naddr, | |
2004 | &arg->ca32_client.cl32_naddr) || | |
2005 | __copy_from_user(&karg->ca_client.cl_addrlist[0], | |
2006 | &arg->ca32_client.cl32_addrlist[0], | |
2007 | (sizeof(struct in_addr) * NFSCLNT_ADDRMAX)) || | |
2008 | __get_user(karg->ca_client.cl_fhkeytype, | |
2009 | &arg->ca32_client.cl32_fhkeytype) || | |
2010 | __get_user(karg->ca_client.cl_fhkeylen, | |
2011 | &arg->ca32_client.cl32_fhkeylen) || | |
2012 | __copy_from_user(&karg->ca_client.cl_fhkey[0], | |
2013 | &arg->ca32_client.cl32_fhkey[0], | |
2014 | NFSCLNT_KEYMAX)) | |
2015 | return -EFAULT; | |
1da177e4 | 2016 | |
d64b1c87 | 2017 | return 0; |
1da177e4 LT |
2018 | } |
2019 | ||
d64b1c87 LFS |
2020 | static int compat_nfs_exp_trans(struct nfsctl_arg *karg, |
2021 | struct compat_nfsctl_arg __user *arg) | |
1da177e4 | 2022 | { |
d64b1c87 LFS |
2023 | if (!access_ok(VERIFY_READ, &arg->ca32_export, |
2024 | sizeof(arg->ca32_export)) || | |
2025 | get_user(karg->ca_version, &arg->ca32_version) || | |
2026 | __copy_from_user(&karg->ca_export.ex_client[0], | |
2027 | &arg->ca32_export.ex32_client[0], | |
2028 | NFSCLNT_IDMAX) || | |
2029 | __copy_from_user(&karg->ca_export.ex_path[0], | |
2030 | &arg->ca32_export.ex32_path[0], | |
2031 | NFS_MAXPATHLEN) || | |
2032 | __get_user(karg->ca_export.ex_dev, | |
2033 | &arg->ca32_export.ex32_dev) || | |
2034 | __get_user(karg->ca_export.ex_ino, | |
2035 | &arg->ca32_export.ex32_ino) || | |
2036 | __get_user(karg->ca_export.ex_flags, | |
2037 | &arg->ca32_export.ex32_flags) || | |
2038 | __get_user(karg->ca_export.ex_anon_uid, | |
2039 | &arg->ca32_export.ex32_anon_uid) || | |
2040 | __get_user(karg->ca_export.ex_anon_gid, | |
2041 | &arg->ca32_export.ex32_anon_gid)) | |
2042 | return -EFAULT; | |
1da177e4 LT |
2043 | SET_UID(karg->ca_export.ex_anon_uid, karg->ca_export.ex_anon_uid); |
2044 | SET_GID(karg->ca_export.ex_anon_gid, karg->ca_export.ex_anon_gid); | |
2045 | ||
d64b1c87 | 2046 | return 0; |
1da177e4 LT |
2047 | } |
2048 | ||
d64b1c87 LFS |
2049 | static int compat_nfs_getfd_trans(struct nfsctl_arg *karg, |
2050 | struct compat_nfsctl_arg __user *arg) | |
1da177e4 | 2051 | { |
d64b1c87 LFS |
2052 | if (!access_ok(VERIFY_READ, &arg->ca32_getfd, |
2053 | sizeof(arg->ca32_getfd)) || | |
2054 | get_user(karg->ca_version, &arg->ca32_version) || | |
2055 | __copy_from_user(&karg->ca_getfd.gd_addr, | |
2056 | &arg->ca32_getfd.gd32_addr, | |
2057 | (sizeof(struct sockaddr))) || | |
2058 | __copy_from_user(&karg->ca_getfd.gd_path, | |
2059 | &arg->ca32_getfd.gd32_path, | |
2060 | (NFS_MAXPATHLEN+1)) || | |
2061 | __get_user(karg->ca_getfd.gd_version, | |
2062 | &arg->ca32_getfd.gd32_version)) | |
2063 | return -EFAULT; | |
1da177e4 | 2064 | |
d64b1c87 | 2065 | return 0; |
1da177e4 LT |
2066 | } |
2067 | ||
d64b1c87 LFS |
2068 | static int compat_nfs_getfs_trans(struct nfsctl_arg *karg, |
2069 | struct compat_nfsctl_arg __user *arg) | |
1da177e4 | 2070 | { |
d64b1c87 LFS |
2071 | if (!access_ok(VERIFY_READ,&arg->ca32_getfs,sizeof(arg->ca32_getfs)) || |
2072 | get_user(karg->ca_version, &arg->ca32_version) || | |
2073 | __copy_from_user(&karg->ca_getfs.gd_addr, | |
2074 | &arg->ca32_getfs.gd32_addr, | |
2075 | (sizeof(struct sockaddr))) || | |
2076 | __copy_from_user(&karg->ca_getfs.gd_path, | |
2077 | &arg->ca32_getfs.gd32_path, | |
2078 | (NFS_MAXPATHLEN+1)) || | |
2079 | __get_user(karg->ca_getfs.gd_maxlen, | |
2080 | &arg->ca32_getfs.gd32_maxlen)) | |
2081 | return -EFAULT; | |
1da177e4 | 2082 | |
d64b1c87 | 2083 | return 0; |
1da177e4 LT |
2084 | } |
2085 | ||
2086 | /* This really doesn't need translations, we are only passing | |
2087 | * back a union which contains opaque nfs file handle data. | |
2088 | */ | |
d64b1c87 LFS |
2089 | static int compat_nfs_getfh_res_trans(union nfsctl_res *kres, |
2090 | union compat_nfsctl_res __user *res) | |
1da177e4 LT |
2091 | { |
2092 | int err; | |
2093 | ||
2094 | err = copy_to_user(res, kres, sizeof(*res)); | |
2095 | ||
2096 | return (err) ? -EFAULT : 0; | |
2097 | } | |
2098 | ||
d64b1c87 LFS |
2099 | asmlinkage long compat_sys_nfsservctl(int cmd, |
2100 | struct compat_nfsctl_arg __user *arg, | |
2101 | union compat_nfsctl_res __user *res) | |
1da177e4 LT |
2102 | { |
2103 | struct nfsctl_arg *karg; | |
2104 | union nfsctl_res *kres; | |
2105 | mm_segment_t oldfs; | |
2106 | int err; | |
2107 | ||
2108 | karg = kmalloc(sizeof(*karg), GFP_USER); | |
2109 | kres = kmalloc(sizeof(*kres), GFP_USER); | |
2110 | if(!karg || !kres) { | |
2111 | err = -ENOMEM; | |
2112 | goto done; | |
2113 | } | |
2114 | ||
2115 | switch(cmd) { | |
2116 | case NFSCTL_SVC: | |
2117 | err = compat_nfs_svc_trans(karg, arg); | |
2118 | break; | |
2119 | ||
2120 | case NFSCTL_ADDCLIENT: | |
2121 | err = compat_nfs_clnt_trans(karg, arg); | |
2122 | break; | |
2123 | ||
2124 | case NFSCTL_DELCLIENT: | |
2125 | err = compat_nfs_clnt_trans(karg, arg); | |
2126 | break; | |
2127 | ||
2128 | case NFSCTL_EXPORT: | |
2129 | case NFSCTL_UNEXPORT: | |
2130 | err = compat_nfs_exp_trans(karg, arg); | |
2131 | break; | |
2132 | ||
2133 | case NFSCTL_GETFD: | |
2134 | err = compat_nfs_getfd_trans(karg, arg); | |
2135 | break; | |
2136 | ||
2137 | case NFSCTL_GETFS: | |
2138 | err = compat_nfs_getfs_trans(karg, arg); | |
2139 | break; | |
2140 | ||
2141 | default: | |
2142 | err = -EINVAL; | |
57070d01 | 2143 | break; |
1da177e4 LT |
2144 | } |
2145 | ||
57070d01 PS |
2146 | if (err) |
2147 | goto done; | |
2148 | ||
1da177e4 LT |
2149 | oldfs = get_fs(); |
2150 | set_fs(KERNEL_DS); | |
2151 | /* The __user pointer casts are valid because of the set_fs() */ | |
2152 | err = sys_nfsservctl(cmd, (void __user *) karg, (void __user *) kres); | |
2153 | set_fs(oldfs); | |
2154 | ||
2155 | if (err) | |
2156 | goto done; | |
2157 | ||
2158 | if((cmd == NFSCTL_GETFD) || | |
2159 | (cmd == NFSCTL_GETFS)) | |
2160 | err = compat_nfs_getfh_res_trans(kres, res); | |
2161 | ||
2162 | done: | |
2163 | kfree(karg); | |
2164 | kfree(kres); | |
2165 | return err; | |
2166 | } | |
2167 | #else /* !NFSD */ | |
2168 | long asmlinkage compat_sys_nfsservctl(int cmd, void *notused, void *notused2) | |
2169 | { | |
2170 | return sys_ni_syscall(); | |
2171 | } | |
2172 | #endif | |
f6dfb4fd DL |
2173 | |
2174 | #ifdef CONFIG_EPOLL | |
2175 | ||
f3de272b | 2176 | #ifdef HAVE_SET_RESTORE_SIGMASK |
f6dfb4fd DL |
2177 | asmlinkage long compat_sys_epoll_pwait(int epfd, |
2178 | struct compat_epoll_event __user *events, | |
2179 | int maxevents, int timeout, | |
2180 | const compat_sigset_t __user *sigmask, | |
2181 | compat_size_t sigsetsize) | |
2182 | { | |
2183 | long err; | |
2184 | compat_sigset_t csigmask; | |
2185 | sigset_t ksigmask, sigsaved; | |
2186 | ||
2187 | /* | |
2188 | * If the caller wants a certain signal mask to be set during the wait, | |
2189 | * we apply it here. | |
2190 | */ | |
2191 | if (sigmask) { | |
2192 | if (sigsetsize != sizeof(compat_sigset_t)) | |
2193 | return -EINVAL; | |
2194 | if (copy_from_user(&csigmask, sigmask, sizeof(csigmask))) | |
2195 | return -EFAULT; | |
2196 | sigset_from_compat(&ksigmask, &csigmask); | |
2197 | sigdelsetmask(&ksigmask, sigmask(SIGKILL) | sigmask(SIGSTOP)); | |
2198 | sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved); | |
2199 | } | |
2200 | ||
f6dfb4fd | 2201 | err = sys_epoll_wait(epfd, events, maxevents, timeout); |
f6dfb4fd DL |
2202 | |
2203 | /* | |
2204 | * If we changed the signal mask, we need to restore the original one. | |
2205 | * In case we've got a signal while waiting, we do not restore the | |
2206 | * signal mask yet, and we allow do_signal() to deliver the signal on | |
2207 | * the way back to userspace, before the signal mask is restored. | |
2208 | */ | |
2209 | if (sigmask) { | |
2210 | if (err == -EINTR) { | |
2211 | memcpy(¤t->saved_sigmask, &sigsaved, | |
2212 | sizeof(sigsaved)); | |
4e4c22c7 | 2213 | set_restore_sigmask(); |
f6dfb4fd DL |
2214 | } else |
2215 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
2216 | } | |
2217 | ||
2218 | return err; | |
2219 | } | |
f3de272b | 2220 | #endif /* HAVE_SET_RESTORE_SIGMASK */ |
f6dfb4fd DL |
2221 | |
2222 | #endif /* CONFIG_EPOLL */ | |
6d18c922 DL |
2223 | |
2224 | #ifdef CONFIG_SIGNALFD | |
2225 | ||
9deb27ba UD |
2226 | asmlinkage long compat_sys_signalfd4(int ufd, |
2227 | const compat_sigset_t __user *sigmask, | |
2228 | compat_size_t sigsetsize, int flags) | |
6d18c922 DL |
2229 | { |
2230 | compat_sigset_t ss32; | |
2231 | sigset_t tmp; | |
2232 | sigset_t __user *ksigmask; | |
2233 | ||
2234 | if (sigsetsize != sizeof(compat_sigset_t)) | |
2235 | return -EINVAL; | |
2236 | if (copy_from_user(&ss32, sigmask, sizeof(ss32))) | |
2237 | return -EFAULT; | |
2238 | sigset_from_compat(&tmp, &ss32); | |
2239 | ksigmask = compat_alloc_user_space(sizeof(sigset_t)); | |
2240 | if (copy_to_user(ksigmask, &tmp, sizeof(sigset_t))) | |
2241 | return -EFAULT; | |
2242 | ||
9deb27ba | 2243 | return sys_signalfd4(ufd, ksigmask, sizeof(sigset_t), flags); |
6d18c922 DL |
2244 | } |
2245 | ||
9deb27ba UD |
2246 | asmlinkage long compat_sys_signalfd(int ufd, |
2247 | const compat_sigset_t __user *sigmask, | |
2248 | compat_size_t sigsetsize) | |
2249 | { | |
2250 | return compat_sys_signalfd4(ufd, sigmask, sigsetsize, 0); | |
2251 | } | |
6d18c922 DL |
2252 | #endif /* CONFIG_SIGNALFD */ |
2253 | ||
83f5d126 DL |
2254 | #ifdef CONFIG_TIMERFD |
2255 | ||
4d672e7a DL |
2256 | asmlinkage long compat_sys_timerfd_settime(int ufd, int flags, |
2257 | const struct compat_itimerspec __user *utmr, | |
2258 | struct compat_itimerspec __user *otmr) | |
83f5d126 | 2259 | { |
4d672e7a | 2260 | int error; |
83f5d126 DL |
2261 | struct itimerspec t; |
2262 | struct itimerspec __user *ut; | |
2263 | ||
83f5d126 | 2264 | if (get_compat_itimerspec(&t, utmr)) |
8317f14b | 2265 | return -EFAULT; |
4d672e7a DL |
2266 | ut = compat_alloc_user_space(2 * sizeof(struct itimerspec)); |
2267 | if (copy_to_user(&ut[0], &t, sizeof(t))) | |
8317f14b | 2268 | return -EFAULT; |
4d672e7a DL |
2269 | error = sys_timerfd_settime(ufd, flags, &ut[0], &ut[1]); |
2270 | if (!error && otmr) | |
2271 | error = (copy_from_user(&t, &ut[1], sizeof(struct itimerspec)) || | |
2272 | put_compat_itimerspec(otmr, &t)) ? -EFAULT: 0; | |
2273 | ||
2274 | return error; | |
2275 | } | |
2276 | ||
2277 | asmlinkage long compat_sys_timerfd_gettime(int ufd, | |
2278 | struct compat_itimerspec __user *otmr) | |
2279 | { | |
2280 | int error; | |
2281 | struct itimerspec t; | |
2282 | struct itimerspec __user *ut; | |
83f5d126 | 2283 | |
4d672e7a DL |
2284 | ut = compat_alloc_user_space(sizeof(struct itimerspec)); |
2285 | error = sys_timerfd_gettime(ufd, ut); | |
2286 | if (!error) | |
2287 | error = (copy_from_user(&t, ut, sizeof(struct itimerspec)) || | |
2288 | put_compat_itimerspec(otmr, &t)) ? -EFAULT: 0; | |
2289 | ||
2290 | return error; | |
83f5d126 DL |
2291 | } |
2292 | ||
2293 | #endif /* CONFIG_TIMERFD */ |