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 | |
a2531293 | 11 | * Copyright (C) 2003 Pavel Machek (pavel@ucw.cz) |
1da177e4 LT |
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 | ||
85c9fe8f | 18 | #include <linux/stddef.h> |
022a1692 | 19 | #include <linux/kernel.h> |
1da177e4 LT |
20 | #include <linux/linkage.h> |
21 | #include <linux/compat.h> | |
22 | #include <linux/errno.h> | |
23 | #include <linux/time.h> | |
24 | #include <linux/fs.h> | |
25 | #include <linux/fcntl.h> | |
26 | #include <linux/namei.h> | |
27 | #include <linux/file.h> | |
9f3acc31 | 28 | #include <linux/fdtable.h> |
1da177e4 | 29 | #include <linux/vfs.h> |
1da177e4 LT |
30 | #include <linux/ioctl.h> |
31 | #include <linux/init.h> | |
1da177e4 | 32 | #include <linux/ncp_mount.h> |
9a9947bf | 33 | #include <linux/nfs4_mount.h> |
1da177e4 LT |
34 | #include <linux/syscalls.h> |
35 | #include <linux/ctype.h> | |
36 | #include <linux/module.h> | |
37 | #include <linux/dirent.h> | |
0eeca283 | 38 | #include <linux/fsnotify.h> |
1da177e4 | 39 | #include <linux/highuid.h> |
1da177e4 LT |
40 | #include <linux/personality.h> |
41 | #include <linux/rwsem.h> | |
8f0ab514 | 42 | #include <linux/tsacct_kern.h> |
6272e266 | 43 | #include <linux/security.h> |
a1f8e7f7 | 44 | #include <linux/highmem.h> |
6d18c922 | 45 | #include <linux/signal.h> |
bd01f843 | 46 | #include <linux/poll.h> |
4a805e86 | 47 | #include <linux/mm.h> |
f6dfb4fd | 48 | #include <linux/eventpoll.h> |
498052bb | 49 | #include <linux/fs_struct.h> |
5a0e3ad6 | 50 | #include <linux/slab.h> |
504b701b | 51 | #include <linux/pagemap.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 | */ | |
c7887325 DH |
78 | asmlinkage long compat_sys_utime(const char __user *filename, |
79 | struct compat_utimbuf __user *t) | |
1da177e4 | 80 | { |
1c710c89 | 81 | struct timespec tv[2]; |
1da177e4 LT |
82 | |
83 | if (t) { | |
84 | if (get_user(tv[0].tv_sec, &t->actime) || | |
85 | get_user(tv[1].tv_sec, &t->modtime)) | |
86 | return -EFAULT; | |
1c710c89 UD |
87 | tv[0].tv_nsec = 0; |
88 | tv[1].tv_nsec = 0; | |
1da177e4 | 89 | } |
1c710c89 UD |
90 | return do_utimes(AT_FDCWD, filename, t ? tv : NULL, 0); |
91 | } | |
92 | ||
c7887325 | 93 | asmlinkage long compat_sys_utimensat(unsigned int dfd, const char __user *filename, struct compat_timespec __user *t, int flags) |
1c710c89 UD |
94 | { |
95 | struct timespec tv[2]; | |
96 | ||
97 | if (t) { | |
98 | if (get_compat_timespec(&tv[0], &t[0]) || | |
99 | get_compat_timespec(&tv[1], &t[1])) | |
100 | return -EFAULT; | |
101 | ||
1c710c89 UD |
102 | if (tv[0].tv_nsec == UTIME_OMIT && tv[1].tv_nsec == UTIME_OMIT) |
103 | return 0; | |
104 | } | |
105 | return do_utimes(dfd, filename, t ? tv : NULL, flags); | |
1da177e4 LT |
106 | } |
107 | ||
c7887325 | 108 | asmlinkage long compat_sys_futimesat(unsigned int dfd, const char __user *filename, struct compat_timeval __user *t) |
1da177e4 | 109 | { |
1c710c89 | 110 | struct timespec tv[2]; |
1da177e4 | 111 | |
9ad11ab4 | 112 | if (t) { |
1da177e4 | 113 | if (get_user(tv[0].tv_sec, &t[0].tv_sec) || |
1c710c89 | 114 | get_user(tv[0].tv_nsec, &t[0].tv_usec) || |
1da177e4 | 115 | get_user(tv[1].tv_sec, &t[1].tv_sec) || |
1c710c89 | 116 | get_user(tv[1].tv_nsec, &t[1].tv_usec)) |
9ad11ab4 | 117 | return -EFAULT; |
1c710c89 UD |
118 | if (tv[0].tv_nsec >= 1000000 || tv[0].tv_nsec < 0 || |
119 | tv[1].tv_nsec >= 1000000 || tv[1].tv_nsec < 0) | |
120 | return -EINVAL; | |
121 | tv[0].tv_nsec *= 1000; | |
122 | tv[1].tv_nsec *= 1000; | |
9ad11ab4 | 123 | } |
1c710c89 | 124 | return do_utimes(dfd, filename, t ? tv : NULL, 0); |
5590ff0d UD |
125 | } |
126 | ||
c7887325 | 127 | asmlinkage long compat_sys_utimes(const char __user *filename, struct compat_timeval __user *t) |
5590ff0d UD |
128 | { |
129 | return compat_sys_futimesat(AT_FDCWD, filename, t); | |
1da177e4 LT |
130 | } |
131 | ||
f7a5000f CH |
132 | static int cp_compat_stat(struct kstat *stat, struct compat_stat __user *ubuf) |
133 | { | |
134 | compat_ino_t ino = stat->ino; | |
135 | typeof(ubuf->st_uid) uid = 0; | |
136 | typeof(ubuf->st_gid) gid = 0; | |
137 | int err; | |
138 | ||
139 | SET_UID(uid, stat->uid); | |
140 | SET_GID(gid, stat->gid); | |
141 | ||
142 | if ((u64) stat->size > MAX_NON_LFS || | |
143 | !old_valid_dev(stat->dev) || | |
144 | !old_valid_dev(stat->rdev)) | |
145 | return -EOVERFLOW; | |
146 | if (sizeof(ino) < sizeof(stat->ino) && ino != stat->ino) | |
147 | return -EOVERFLOW; | |
148 | ||
149 | if (clear_user(ubuf, sizeof(*ubuf))) | |
150 | return -EFAULT; | |
151 | ||
152 | err = __put_user(old_encode_dev(stat->dev), &ubuf->st_dev); | |
153 | err |= __put_user(ino, &ubuf->st_ino); | |
154 | err |= __put_user(stat->mode, &ubuf->st_mode); | |
155 | err |= __put_user(stat->nlink, &ubuf->st_nlink); | |
156 | err |= __put_user(uid, &ubuf->st_uid); | |
157 | err |= __put_user(gid, &ubuf->st_gid); | |
158 | err |= __put_user(old_encode_dev(stat->rdev), &ubuf->st_rdev); | |
159 | err |= __put_user(stat->size, &ubuf->st_size); | |
160 | err |= __put_user(stat->atime.tv_sec, &ubuf->st_atime); | |
161 | err |= __put_user(stat->atime.tv_nsec, &ubuf->st_atime_nsec); | |
162 | err |= __put_user(stat->mtime.tv_sec, &ubuf->st_mtime); | |
163 | err |= __put_user(stat->mtime.tv_nsec, &ubuf->st_mtime_nsec); | |
164 | err |= __put_user(stat->ctime.tv_sec, &ubuf->st_ctime); | |
165 | err |= __put_user(stat->ctime.tv_nsec, &ubuf->st_ctime_nsec); | |
166 | err |= __put_user(stat->blksize, &ubuf->st_blksize); | |
167 | err |= __put_user(stat->blocks, &ubuf->st_blocks); | |
168 | return err; | |
169 | } | |
170 | ||
c7887325 | 171 | asmlinkage long compat_sys_newstat(const char __user * filename, |
1da177e4 LT |
172 | struct compat_stat __user *statbuf) |
173 | { | |
174 | struct kstat stat; | |
2eae7a18 | 175 | int error; |
1da177e4 | 176 | |
2eae7a18 CH |
177 | error = vfs_stat(filename, &stat); |
178 | if (error) | |
179 | return error; | |
180 | return cp_compat_stat(&stat, statbuf); | |
1da177e4 LT |
181 | } |
182 | ||
c7887325 | 183 | asmlinkage long compat_sys_newlstat(const char __user * filename, |
1da177e4 LT |
184 | struct compat_stat __user *statbuf) |
185 | { | |
186 | struct kstat stat; | |
2eae7a18 | 187 | int error; |
1da177e4 | 188 | |
2eae7a18 CH |
189 | error = vfs_lstat(filename, &stat); |
190 | if (error) | |
191 | return error; | |
192 | return cp_compat_stat(&stat, statbuf); | |
1da177e4 LT |
193 | } |
194 | ||
82d821dd | 195 | #ifndef __ARCH_WANT_STAT64 |
c7887325 DH |
196 | asmlinkage long compat_sys_newfstatat(unsigned int dfd, |
197 | const char __user *filename, | |
5590ff0d UD |
198 | struct compat_stat __user *statbuf, int flag) |
199 | { | |
200 | struct kstat stat; | |
0112fc22 | 201 | int error; |
5590ff0d | 202 | |
0112fc22 OD |
203 | error = vfs_fstatat(dfd, filename, &stat, flag); |
204 | if (error) | |
205 | return error; | |
206 | return cp_compat_stat(&stat, statbuf); | |
5590ff0d | 207 | } |
82d821dd | 208 | #endif |
5590ff0d | 209 | |
1da177e4 LT |
210 | asmlinkage long compat_sys_newfstat(unsigned int fd, |
211 | struct compat_stat __user * statbuf) | |
212 | { | |
213 | struct kstat stat; | |
214 | int error = vfs_fstat(fd, &stat); | |
215 | ||
216 | if (!error) | |
217 | error = cp_compat_stat(&stat, statbuf); | |
218 | return error; | |
219 | } | |
220 | ||
221 | static int put_compat_statfs(struct compat_statfs __user *ubuf, struct kstatfs *kbuf) | |
222 | { | |
223 | ||
224 | if (sizeof ubuf->f_blocks == 4) { | |
f4a67cce JT |
225 | if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail | |
226 | kbuf->f_bsize | kbuf->f_frsize) & 0xffffffff00000000ULL) | |
1da177e4 LT |
227 | return -EOVERFLOW; |
228 | /* f_files and f_ffree may be -1; it's okay | |
229 | * to stuff that into 32 bits */ | |
230 | if (kbuf->f_files != 0xffffffffffffffffULL | |
231 | && (kbuf->f_files & 0xffffffff00000000ULL)) | |
232 | return -EOVERFLOW; | |
233 | if (kbuf->f_ffree != 0xffffffffffffffffULL | |
234 | && (kbuf->f_ffree & 0xffffffff00000000ULL)) | |
235 | return -EOVERFLOW; | |
236 | } | |
237 | if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) || | |
238 | __put_user(kbuf->f_type, &ubuf->f_type) || | |
239 | __put_user(kbuf->f_bsize, &ubuf->f_bsize) || | |
240 | __put_user(kbuf->f_blocks, &ubuf->f_blocks) || | |
241 | __put_user(kbuf->f_bfree, &ubuf->f_bfree) || | |
242 | __put_user(kbuf->f_bavail, &ubuf->f_bavail) || | |
243 | __put_user(kbuf->f_files, &ubuf->f_files) || | |
244 | __put_user(kbuf->f_ffree, &ubuf->f_ffree) || | |
245 | __put_user(kbuf->f_namelen, &ubuf->f_namelen) || | |
246 | __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) || | |
247 | __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) || | |
248 | __put_user(kbuf->f_frsize, &ubuf->f_frsize) || | |
1448c721 EB |
249 | __put_user(kbuf->f_flags, &ubuf->f_flags) || |
250 | __clear_user(ubuf->f_spare, sizeof(ubuf->f_spare))) | |
1da177e4 LT |
251 | return -EFAULT; |
252 | return 0; | |
253 | } | |
254 | ||
255 | /* | |
974d879e | 256 | * The following statfs calls are copies of code from fs/statfs.c and |
1da177e4 LT |
257 | * should be checked against those from time to time |
258 | */ | |
2d8f3038 | 259 | asmlinkage long compat_sys_statfs(const char __user *pathname, struct compat_statfs __user *buf) |
1da177e4 | 260 | { |
c8b91acc AV |
261 | struct kstatfs tmp; |
262 | int error = user_statfs(pathname, &tmp); | |
263 | if (!error) | |
264 | error = put_compat_statfs(buf, &tmp); | |
1da177e4 LT |
265 | return error; |
266 | } | |
267 | ||
268 | asmlinkage long compat_sys_fstatfs(unsigned int fd, struct compat_statfs __user *buf) | |
269 | { | |
1da177e4 | 270 | struct kstatfs tmp; |
c8b91acc | 271 | int error = fd_statfs(fd, &tmp); |
86e07ce7 DG |
272 | if (!error) |
273 | error = put_compat_statfs(buf, &tmp); | |
1da177e4 LT |
274 | return error; |
275 | } | |
276 | ||
277 | static int put_compat_statfs64(struct compat_statfs64 __user *ubuf, struct kstatfs *kbuf) | |
278 | { | |
279 | if (sizeof ubuf->f_blocks == 4) { | |
f4a67cce JT |
280 | if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail | |
281 | kbuf->f_bsize | kbuf->f_frsize) & 0xffffffff00000000ULL) | |
1da177e4 LT |
282 | return -EOVERFLOW; |
283 | /* f_files and f_ffree may be -1; it's okay | |
284 | * to stuff that into 32 bits */ | |
285 | if (kbuf->f_files != 0xffffffffffffffffULL | |
286 | && (kbuf->f_files & 0xffffffff00000000ULL)) | |
287 | return -EOVERFLOW; | |
288 | if (kbuf->f_ffree != 0xffffffffffffffffULL | |
289 | && (kbuf->f_ffree & 0xffffffff00000000ULL)) | |
290 | return -EOVERFLOW; | |
291 | } | |
292 | if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) || | |
293 | __put_user(kbuf->f_type, &ubuf->f_type) || | |
294 | __put_user(kbuf->f_bsize, &ubuf->f_bsize) || | |
295 | __put_user(kbuf->f_blocks, &ubuf->f_blocks) || | |
296 | __put_user(kbuf->f_bfree, &ubuf->f_bfree) || | |
297 | __put_user(kbuf->f_bavail, &ubuf->f_bavail) || | |
298 | __put_user(kbuf->f_files, &ubuf->f_files) || | |
299 | __put_user(kbuf->f_ffree, &ubuf->f_ffree) || | |
300 | __put_user(kbuf->f_namelen, &ubuf->f_namelen) || | |
301 | __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) || | |
302 | __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) || | |
e0bb6bda NK |
303 | __put_user(kbuf->f_frsize, &ubuf->f_frsize) || |
304 | __put_user(kbuf->f_flags, &ubuf->f_flags) || | |
305 | __clear_user(ubuf->f_spare, sizeof(ubuf->f_spare))) | |
1da177e4 LT |
306 | return -EFAULT; |
307 | return 0; | |
308 | } | |
309 | ||
2d8f3038 | 310 | asmlinkage long compat_sys_statfs64(const char __user *pathname, compat_size_t sz, struct compat_statfs64 __user *buf) |
1da177e4 | 311 | { |
c8b91acc | 312 | struct kstatfs tmp; |
1da177e4 LT |
313 | int error; |
314 | ||
315 | if (sz != sizeof(*buf)) | |
316 | return -EINVAL; | |
317 | ||
c8b91acc AV |
318 | error = user_statfs(pathname, &tmp); |
319 | if (!error) | |
320 | error = put_compat_statfs64(buf, &tmp); | |
1da177e4 LT |
321 | return error; |
322 | } | |
323 | ||
324 | asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz, struct compat_statfs64 __user *buf) | |
325 | { | |
1da177e4 LT |
326 | struct kstatfs tmp; |
327 | int error; | |
328 | ||
329 | if (sz != sizeof(*buf)) | |
330 | return -EINVAL; | |
331 | ||
c8b91acc | 332 | error = fd_statfs(fd, &tmp); |
86e07ce7 DG |
333 | if (!error) |
334 | error = put_compat_statfs64(buf, &tmp); | |
1da177e4 LT |
335 | return error; |
336 | } | |
337 | ||
2b1c6bd7 CH |
338 | /* |
339 | * This is a copy of sys_ustat, just dealing with a structure layout. | |
340 | * Given how simple this syscall is that apporach is more maintainable | |
341 | * than the various conversion hacks. | |
342 | */ | |
343 | asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u) | |
344 | { | |
345 | struct super_block *sb; | |
346 | struct compat_ustat tmp; | |
347 | struct kstatfs sbuf; | |
348 | int err; | |
349 | ||
350 | sb = user_get_super(new_decode_dev(dev)); | |
351 | if (!sb) | |
352 | return -EINVAL; | |
ebabe9a9 | 353 | err = statfs_by_dentry(sb->s_root, &sbuf); |
2b1c6bd7 CH |
354 | drop_super(sb); |
355 | if (err) | |
356 | return err; | |
357 | ||
358 | memset(&tmp, 0, sizeof(struct compat_ustat)); | |
359 | tmp.f_tfree = sbuf.f_bfree; | |
360 | tmp.f_tinode = sbuf.f_ffree; | |
361 | if (copy_to_user(u, &tmp, sizeof(struct compat_ustat))) | |
362 | return -EFAULT; | |
363 | return 0; | |
364 | } | |
365 | ||
1da177e4 LT |
366 | static int get_compat_flock(struct flock *kfl, struct compat_flock __user *ufl) |
367 | { | |
368 | if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) || | |
369 | __get_user(kfl->l_type, &ufl->l_type) || | |
370 | __get_user(kfl->l_whence, &ufl->l_whence) || | |
371 | __get_user(kfl->l_start, &ufl->l_start) || | |
372 | __get_user(kfl->l_len, &ufl->l_len) || | |
373 | __get_user(kfl->l_pid, &ufl->l_pid)) | |
374 | return -EFAULT; | |
375 | return 0; | |
376 | } | |
377 | ||
378 | static int put_compat_flock(struct flock *kfl, struct compat_flock __user *ufl) | |
379 | { | |
380 | if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) || | |
381 | __put_user(kfl->l_type, &ufl->l_type) || | |
382 | __put_user(kfl->l_whence, &ufl->l_whence) || | |
383 | __put_user(kfl->l_start, &ufl->l_start) || | |
384 | __put_user(kfl->l_len, &ufl->l_len) || | |
385 | __put_user(kfl->l_pid, &ufl->l_pid)) | |
386 | return -EFAULT; | |
387 | return 0; | |
388 | } | |
389 | ||
390 | #ifndef HAVE_ARCH_GET_COMPAT_FLOCK64 | |
391 | static int get_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl) | |
392 | { | |
393 | if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) || | |
394 | __get_user(kfl->l_type, &ufl->l_type) || | |
395 | __get_user(kfl->l_whence, &ufl->l_whence) || | |
396 | __get_user(kfl->l_start, &ufl->l_start) || | |
397 | __get_user(kfl->l_len, &ufl->l_len) || | |
398 | __get_user(kfl->l_pid, &ufl->l_pid)) | |
399 | return -EFAULT; | |
400 | return 0; | |
401 | } | |
402 | #endif | |
403 | ||
404 | #ifndef HAVE_ARCH_PUT_COMPAT_FLOCK64 | |
405 | static int put_compat_flock64(struct flock *kfl, struct compat_flock64 __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 | #endif | |
417 | ||
418 | asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd, | |
419 | unsigned long arg) | |
420 | { | |
421 | mm_segment_t old_fs; | |
422 | struct flock f; | |
423 | long ret; | |
424 | ||
425 | switch (cmd) { | |
426 | case F_GETLK: | |
427 | case F_SETLK: | |
428 | case F_SETLKW: | |
429 | ret = get_compat_flock(&f, compat_ptr(arg)); | |
430 | if (ret != 0) | |
431 | break; | |
432 | old_fs = get_fs(); | |
433 | set_fs(KERNEL_DS); | |
434 | ret = sys_fcntl(fd, cmd, (unsigned long)&f); | |
435 | set_fs(old_fs); | |
436 | if (cmd == F_GETLK && ret == 0) { | |
ff677f8d | 437 | /* GETLK was successful and we need to return the data... |
2520f14c N |
438 | * but it needs to fit in the compat structure. |
439 | * l_start shouldn't be too big, unless the original | |
440 | * start + end is greater than COMPAT_OFF_T_MAX, in which | |
441 | * case the app was asking for trouble, so we return | |
442 | * -EOVERFLOW in that case. | |
443 | * l_len could be too big, in which case we just truncate it, | |
444 | * and only allow the app to see that part of the conflicting | |
445 | * lock that might make sense to it anyway | |
446 | */ | |
447 | ||
448 | if (f.l_start > COMPAT_OFF_T_MAX) | |
1da177e4 | 449 | ret = -EOVERFLOW; |
2520f14c N |
450 | if (f.l_len > COMPAT_OFF_T_MAX) |
451 | f.l_len = COMPAT_OFF_T_MAX; | |
1da177e4 LT |
452 | if (ret == 0) |
453 | ret = put_compat_flock(&f, compat_ptr(arg)); | |
454 | } | |
455 | break; | |
456 | ||
457 | case F_GETLK64: | |
458 | case F_SETLK64: | |
459 | case F_SETLKW64: | |
460 | ret = get_compat_flock64(&f, compat_ptr(arg)); | |
461 | if (ret != 0) | |
462 | break; | |
463 | old_fs = get_fs(); | |
464 | set_fs(KERNEL_DS); | |
465 | ret = sys_fcntl(fd, (cmd == F_GETLK64) ? F_GETLK : | |
466 | ((cmd == F_SETLK64) ? F_SETLK : F_SETLKW), | |
467 | (unsigned long)&f); | |
468 | set_fs(old_fs); | |
469 | if (cmd == F_GETLK64 && ret == 0) { | |
2520f14c N |
470 | /* need to return lock information - see above for commentary */ |
471 | if (f.l_start > COMPAT_LOFF_T_MAX) | |
1da177e4 | 472 | ret = -EOVERFLOW; |
2520f14c N |
473 | if (f.l_len > COMPAT_LOFF_T_MAX) |
474 | f.l_len = COMPAT_LOFF_T_MAX; | |
1da177e4 LT |
475 | if (ret == 0) |
476 | ret = put_compat_flock64(&f, compat_ptr(arg)); | |
477 | } | |
478 | break; | |
479 | ||
480 | default: | |
481 | ret = sys_fcntl(fd, cmd, arg); | |
482 | break; | |
483 | } | |
484 | return ret; | |
485 | } | |
486 | ||
487 | asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd, | |
488 | unsigned long arg) | |
489 | { | |
490 | if ((cmd == F_GETLK64) || (cmd == F_SETLK64) || (cmd == F_SETLKW64)) | |
491 | return -EINVAL; | |
492 | return compat_sys_fcntl64(fd, cmd, arg); | |
493 | } | |
494 | ||
495 | asmlinkage long | |
496 | compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p) | |
497 | { | |
498 | long ret; | |
499 | aio_context_t ctx64; | |
500 | ||
501 | mm_segment_t oldfs = get_fs(); | |
502 | if (unlikely(get_user(ctx64, ctx32p))) | |
503 | return -EFAULT; | |
504 | ||
505 | set_fs(KERNEL_DS); | |
506 | /* The __user pointer cast is valid because of the set_fs() */ | |
507 | ret = sys_io_setup(nr_reqs, (aio_context_t __user *) &ctx64); | |
508 | set_fs(oldfs); | |
509 | /* truncating is ok because it's a user address */ | |
510 | if (!ret) | |
511 | ret = put_user((u32) ctx64, ctx32p); | |
512 | return ret; | |
513 | } | |
514 | ||
515 | asmlinkage long | |
516 | compat_sys_io_getevents(aio_context_t ctx_id, | |
517 | unsigned long min_nr, | |
518 | unsigned long nr, | |
519 | struct io_event __user *events, | |
520 | struct compat_timespec __user *timeout) | |
521 | { | |
522 | long ret; | |
523 | struct timespec t; | |
524 | struct timespec __user *ut = NULL; | |
525 | ||
526 | ret = -EFAULT; | |
527 | if (unlikely(!access_ok(VERIFY_WRITE, events, | |
528 | nr * sizeof(struct io_event)))) | |
529 | goto out; | |
530 | if (timeout) { | |
531 | if (get_compat_timespec(&t, timeout)) | |
532 | goto out; | |
533 | ||
534 | ut = compat_alloc_user_space(sizeof(*ut)); | |
535 | if (copy_to_user(ut, &t, sizeof(t)) ) | |
536 | goto out; | |
537 | } | |
538 | ret = sys_io_getevents(ctx_id, min_nr, nr, events, ut); | |
539 | out: | |
540 | return ret; | |
541 | } | |
542 | ||
b8373363 JM |
543 | /* A write operation does a read from user space and vice versa */ |
544 | #define vrfy_dir(type) ((type) == READ ? VERIFY_WRITE : VERIFY_READ) | |
545 | ||
546 | ssize_t compat_rw_copy_check_uvector(int type, | |
547 | const struct compat_iovec __user *uvector, unsigned long nr_segs, | |
548 | unsigned long fast_segs, struct iovec *fast_pointer, | |
549 | struct iovec **ret_pointer) | |
550 | { | |
551 | compat_ssize_t tot_len; | |
552 | struct iovec *iov = *ret_pointer = fast_pointer; | |
553 | ssize_t ret = 0; | |
554 | int seg; | |
555 | ||
556 | /* | |
557 | * SuS says "The readv() function *may* fail if the iovcnt argument | |
558 | * was less than or equal to 0, or greater than {IOV_MAX}. Linux has | |
559 | * traditionally returned zero for zero segments, so... | |
560 | */ | |
561 | if (nr_segs == 0) | |
562 | goto out; | |
563 | ||
564 | ret = -EINVAL; | |
565 | if (nr_segs > UIO_MAXIOV || nr_segs < 0) | |
566 | goto out; | |
567 | if (nr_segs > fast_segs) { | |
568 | ret = -ENOMEM; | |
569 | iov = kmalloc(nr_segs*sizeof(struct iovec), GFP_KERNEL); | |
6a5640f1 | 570 | if (iov == NULL) |
b8373363 | 571 | goto out; |
b8373363 JM |
572 | } |
573 | *ret_pointer = iov; | |
574 | ||
575 | /* | |
576 | * Single unix specification: | |
577 | * We should -EINVAL if an element length is not >= 0 and fitting an | |
435f49a5 | 578 | * ssize_t. |
b8373363 | 579 | * |
435f49a5 LT |
580 | * In Linux, the total length is limited to MAX_RW_COUNT, there is |
581 | * no overflow possibility. | |
b8373363 JM |
582 | */ |
583 | tot_len = 0; | |
584 | ret = -EINVAL; | |
585 | for (seg = 0; seg < nr_segs; seg++) { | |
b8373363 JM |
586 | compat_uptr_t buf; |
587 | compat_ssize_t len; | |
588 | ||
589 | if (__get_user(len, &uvector->iov_len) || | |
590 | __get_user(buf, &uvector->iov_base)) { | |
591 | ret = -EFAULT; | |
592 | goto out; | |
593 | } | |
594 | if (len < 0) /* size_t not fitting in compat_ssize_t .. */ | |
595 | goto out; | |
7cbe1770 | 596 | if (!access_ok(vrfy_dir(type), compat_ptr(buf), len)) { |
b8373363 JM |
597 | ret = -EFAULT; |
598 | goto out; | |
599 | } | |
435f49a5 LT |
600 | if (len > MAX_RW_COUNT - tot_len) |
601 | len = MAX_RW_COUNT - tot_len; | |
602 | tot_len += len; | |
b8373363 JM |
603 | iov->iov_base = compat_ptr(buf); |
604 | iov->iov_len = (compat_size_t) len; | |
605 | uvector++; | |
606 | iov++; | |
607 | } | |
608 | ret = tot_len; | |
609 | ||
610 | out: | |
611 | return ret; | |
612 | } | |
613 | ||
1da177e4 LT |
614 | static inline long |
615 | copy_iocb(long nr, u32 __user *ptr32, struct iocb __user * __user *ptr64) | |
616 | { | |
617 | compat_uptr_t uptr; | |
618 | int i; | |
619 | ||
620 | for (i = 0; i < nr; ++i) { | |
621 | if (get_user(uptr, ptr32 + i)) | |
622 | return -EFAULT; | |
623 | if (put_user(compat_ptr(uptr), ptr64 + i)) | |
624 | return -EFAULT; | |
625 | } | |
626 | return 0; | |
627 | } | |
628 | ||
629 | #define MAX_AIO_SUBMITS (PAGE_SIZE/sizeof(struct iocb *)) | |
630 | ||
631 | asmlinkage long | |
632 | compat_sys_io_submit(aio_context_t ctx_id, int nr, u32 __user *iocb) | |
633 | { | |
634 | struct iocb __user * __user *iocb64; | |
635 | long ret; | |
636 | ||
637 | if (unlikely(nr < 0)) | |
638 | return -EINVAL; | |
639 | ||
640 | if (nr > MAX_AIO_SUBMITS) | |
641 | nr = MAX_AIO_SUBMITS; | |
642 | ||
643 | iocb64 = compat_alloc_user_space(nr * sizeof(*iocb64)); | |
644 | ret = copy_iocb(nr, iocb, iocb64); | |
645 | if (!ret) | |
9d85cba7 | 646 | ret = do_io_submit(ctx_id, nr, iocb64, 1); |
1da177e4 LT |
647 | return ret; |
648 | } | |
649 | ||
650 | struct compat_ncp_mount_data { | |
651 | compat_int_t version; | |
652 | compat_uint_t ncp_fd; | |
202e5979 | 653 | __compat_uid_t mounted_uid; |
1da177e4 LT |
654 | compat_pid_t wdog_pid; |
655 | unsigned char mounted_vol[NCP_VOLNAME_LEN + 1]; | |
656 | compat_uint_t time_out; | |
657 | compat_uint_t retry_count; | |
658 | compat_uint_t flags; | |
202e5979 SR |
659 | __compat_uid_t uid; |
660 | __compat_gid_t gid; | |
1da177e4 LT |
661 | compat_mode_t file_mode; |
662 | compat_mode_t dir_mode; | |
663 | }; | |
664 | ||
665 | struct compat_ncp_mount_data_v4 { | |
666 | compat_int_t version; | |
667 | compat_ulong_t flags; | |
668 | compat_ulong_t mounted_uid; | |
669 | compat_long_t wdog_pid; | |
670 | compat_uint_t ncp_fd; | |
671 | compat_uint_t time_out; | |
672 | compat_uint_t retry_count; | |
673 | compat_ulong_t uid; | |
674 | compat_ulong_t gid; | |
675 | compat_ulong_t file_mode; | |
676 | compat_ulong_t dir_mode; | |
677 | }; | |
678 | ||
679 | static void *do_ncp_super_data_conv(void *raw_data) | |
680 | { | |
681 | int version = *(unsigned int *)raw_data; | |
682 | ||
683 | if (version == 3) { | |
684 | struct compat_ncp_mount_data *c_n = raw_data; | |
685 | struct ncp_mount_data *n = raw_data; | |
686 | ||
687 | n->dir_mode = c_n->dir_mode; | |
688 | n->file_mode = c_n->file_mode; | |
689 | n->gid = c_n->gid; | |
690 | n->uid = c_n->uid; | |
691 | memmove (n->mounted_vol, c_n->mounted_vol, (sizeof (c_n->mounted_vol) + 3 * sizeof (unsigned int))); | |
692 | n->wdog_pid = c_n->wdog_pid; | |
693 | n->mounted_uid = c_n->mounted_uid; | |
694 | } else if (version == 4) { | |
695 | struct compat_ncp_mount_data_v4 *c_n = raw_data; | |
696 | struct ncp_mount_data_v4 *n = raw_data; | |
697 | ||
698 | n->dir_mode = c_n->dir_mode; | |
699 | n->file_mode = c_n->file_mode; | |
700 | n->gid = c_n->gid; | |
701 | n->uid = c_n->uid; | |
702 | n->retry_count = c_n->retry_count; | |
703 | n->time_out = c_n->time_out; | |
704 | n->ncp_fd = c_n->ncp_fd; | |
705 | n->wdog_pid = c_n->wdog_pid; | |
706 | n->mounted_uid = c_n->mounted_uid; | |
707 | n->flags = c_n->flags; | |
708 | } else if (version != 5) { | |
709 | return NULL; | |
710 | } | |
711 | ||
712 | return raw_data; | |
713 | } | |
714 | ||
1da177e4 | 715 | |
9a9947bf DH |
716 | struct compat_nfs_string { |
717 | compat_uint_t len; | |
5fc3e624 | 718 | compat_uptr_t data; |
9a9947bf DH |
719 | }; |
720 | ||
721 | static inline void compat_nfs_string(struct nfs_string *dst, | |
722 | struct compat_nfs_string *src) | |
723 | { | |
724 | dst->data = compat_ptr(src->data); | |
725 | dst->len = src->len; | |
726 | } | |
727 | ||
728 | struct compat_nfs4_mount_data_v1 { | |
729 | compat_int_t version; | |
730 | compat_int_t flags; | |
731 | compat_int_t rsize; | |
732 | compat_int_t wsize; | |
733 | compat_int_t timeo; | |
734 | compat_int_t retrans; | |
735 | compat_int_t acregmin; | |
736 | compat_int_t acregmax; | |
737 | compat_int_t acdirmin; | |
738 | compat_int_t acdirmax; | |
739 | struct compat_nfs_string client_addr; | |
740 | struct compat_nfs_string mnt_path; | |
741 | struct compat_nfs_string hostname; | |
742 | compat_uint_t host_addrlen; | |
5fc3e624 | 743 | compat_uptr_t host_addr; |
9a9947bf DH |
744 | compat_int_t proto; |
745 | compat_int_t auth_flavourlen; | |
5fc3e624 | 746 | compat_uptr_t auth_flavours; |
9a9947bf DH |
747 | }; |
748 | ||
749 | static int do_nfs4_super_data_conv(void *raw_data) | |
750 | { | |
751 | int version = *(compat_uint_t *) raw_data; | |
752 | ||
753 | if (version == 1) { | |
754 | struct compat_nfs4_mount_data_v1 *raw = raw_data; | |
755 | struct nfs4_mount_data *real = raw_data; | |
756 | ||
757 | /* copy the fields backwards */ | |
758 | real->auth_flavours = compat_ptr(raw->auth_flavours); | |
759 | real->auth_flavourlen = raw->auth_flavourlen; | |
760 | real->proto = raw->proto; | |
761 | real->host_addr = compat_ptr(raw->host_addr); | |
762 | real->host_addrlen = raw->host_addrlen; | |
763 | compat_nfs_string(&real->hostname, &raw->hostname); | |
764 | compat_nfs_string(&real->mnt_path, &raw->mnt_path); | |
765 | compat_nfs_string(&real->client_addr, &raw->client_addr); | |
766 | real->acdirmax = raw->acdirmax; | |
767 | real->acdirmin = raw->acdirmin; | |
768 | real->acregmax = raw->acregmax; | |
769 | real->acregmin = raw->acregmin; | |
770 | real->retrans = raw->retrans; | |
771 | real->timeo = raw->timeo; | |
772 | real->wsize = raw->wsize; | |
773 | real->rsize = raw->rsize; | |
774 | real->flags = raw->flags; | |
775 | real->version = raw->version; | |
776 | } | |
9a9947bf DH |
777 | |
778 | return 0; | |
779 | } | |
780 | ||
1da177e4 | 781 | #define NCPFS_NAME "ncpfs" |
9a9947bf | 782 | #define NFS4_NAME "nfs4" |
1da177e4 | 783 | |
c7887325 DH |
784 | asmlinkage long compat_sys_mount(const char __user * dev_name, |
785 | const char __user * dir_name, | |
786 | const char __user * type, unsigned long flags, | |
787 | const void __user * data) | |
1da177e4 | 788 | { |
eca6f534 | 789 | char *kernel_type; |
1da177e4 | 790 | unsigned long data_page; |
eca6f534 | 791 | char *kernel_dev; |
1da177e4 LT |
792 | char *dir_page; |
793 | int retval; | |
794 | ||
eca6f534 | 795 | retval = copy_mount_string(type, &kernel_type); |
1da177e4 LT |
796 | if (retval < 0) |
797 | goto out; | |
798 | ||
799 | dir_page = getname(dir_name); | |
800 | retval = PTR_ERR(dir_page); | |
801 | if (IS_ERR(dir_page)) | |
802 | goto out1; | |
803 | ||
eca6f534 | 804 | retval = copy_mount_string(dev_name, &kernel_dev); |
1da177e4 LT |
805 | if (retval < 0) |
806 | goto out2; | |
807 | ||
eca6f534 | 808 | retval = copy_mount_options(data, &data_page); |
1da177e4 LT |
809 | if (retval < 0) |
810 | goto out3; | |
811 | ||
812 | retval = -EINVAL; | |
813 | ||
eca6f534 | 814 | if (kernel_type && data_page) { |
2116b7a4 | 815 | if (!strcmp(kernel_type, NCPFS_NAME)) { |
1da177e4 | 816 | do_ncp_super_data_conv((void *)data_page); |
eca6f534 | 817 | } else if (!strcmp(kernel_type, NFS4_NAME)) { |
9a9947bf DH |
818 | if (do_nfs4_super_data_conv((void *) data_page)) |
819 | goto out4; | |
1da177e4 LT |
820 | } |
821 | } | |
822 | ||
eca6f534 | 823 | retval = do_mount(kernel_dev, dir_page, kernel_type, |
1da177e4 | 824 | flags, (void*)data_page); |
1da177e4 | 825 | |
9a9947bf | 826 | out4: |
1da177e4 LT |
827 | free_page(data_page); |
828 | out3: | |
eca6f534 | 829 | kfree(kernel_dev); |
1da177e4 LT |
830 | out2: |
831 | putname(dir_page); | |
832 | out1: | |
eca6f534 | 833 | kfree(kernel_type); |
1da177e4 LT |
834 | out: |
835 | return retval; | |
836 | } | |
837 | ||
1da177e4 LT |
838 | struct compat_old_linux_dirent { |
839 | compat_ulong_t d_ino; | |
840 | compat_ulong_t d_offset; | |
841 | unsigned short d_namlen; | |
842 | char d_name[1]; | |
843 | }; | |
844 | ||
845 | struct compat_readdir_callback { | |
846 | struct compat_old_linux_dirent __user *dirent; | |
847 | int result; | |
848 | }; | |
849 | ||
850 | static int compat_fillonedir(void *__buf, const char *name, int namlen, | |
afefdbb2 | 851 | loff_t offset, u64 ino, unsigned int d_type) |
1da177e4 LT |
852 | { |
853 | struct compat_readdir_callback *buf = __buf; | |
854 | struct compat_old_linux_dirent __user *dirent; | |
afefdbb2 | 855 | compat_ulong_t d_ino; |
1da177e4 LT |
856 | |
857 | if (buf->result) | |
858 | return -EINVAL; | |
afefdbb2 | 859 | d_ino = ino; |
8f3f655d AV |
860 | if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) { |
861 | buf->result = -EOVERFLOW; | |
afefdbb2 | 862 | return -EOVERFLOW; |
8f3f655d | 863 | } |
1da177e4 LT |
864 | buf->result++; |
865 | dirent = buf->dirent; | |
866 | if (!access_ok(VERIFY_WRITE, dirent, | |
867 | (unsigned long)(dirent->d_name + namlen + 1) - | |
868 | (unsigned long)dirent)) | |
869 | goto efault; | |
afefdbb2 | 870 | if ( __put_user(d_ino, &dirent->d_ino) || |
1da177e4 LT |
871 | __put_user(offset, &dirent->d_offset) || |
872 | __put_user(namlen, &dirent->d_namlen) || | |
873 | __copy_to_user(dirent->d_name, name, namlen) || | |
874 | __put_user(0, dirent->d_name + namlen)) | |
875 | goto efault; | |
876 | return 0; | |
877 | efault: | |
878 | buf->result = -EFAULT; | |
879 | return -EFAULT; | |
880 | } | |
881 | ||
882 | asmlinkage long compat_sys_old_readdir(unsigned int fd, | |
883 | struct compat_old_linux_dirent __user *dirent, unsigned int count) | |
884 | { | |
885 | int error; | |
886 | struct file *file; | |
887 | struct compat_readdir_callback buf; | |
888 | ||
889 | error = -EBADF; | |
890 | file = fget(fd); | |
891 | if (!file) | |
892 | goto out; | |
893 | ||
894 | buf.result = 0; | |
895 | buf.dirent = dirent; | |
896 | ||
897 | error = vfs_readdir(file, compat_fillonedir, &buf); | |
53c9c5c0 | 898 | if (buf.result) |
1da177e4 LT |
899 | error = buf.result; |
900 | ||
901 | fput(file); | |
902 | out: | |
903 | return error; | |
904 | } | |
905 | ||
906 | struct compat_linux_dirent { | |
907 | compat_ulong_t d_ino; | |
908 | compat_ulong_t d_off; | |
909 | unsigned short d_reclen; | |
910 | char d_name[1]; | |
911 | }; | |
912 | ||
913 | struct compat_getdents_callback { | |
914 | struct compat_linux_dirent __user *current_dir; | |
915 | struct compat_linux_dirent __user *previous; | |
916 | int count; | |
917 | int error; | |
918 | }; | |
919 | ||
920 | static int compat_filldir(void *__buf, const char *name, int namlen, | |
afefdbb2 | 921 | loff_t offset, u64 ino, unsigned int d_type) |
1da177e4 LT |
922 | { |
923 | struct compat_linux_dirent __user * dirent; | |
924 | struct compat_getdents_callback *buf = __buf; | |
afefdbb2 | 925 | compat_ulong_t d_ino; |
85c9fe8f KW |
926 | int reclen = ALIGN(offsetof(struct compat_linux_dirent, d_name) + |
927 | namlen + 2, sizeof(compat_long_t)); | |
1da177e4 LT |
928 | |
929 | buf->error = -EINVAL; /* only used if we fail.. */ | |
930 | if (reclen > buf->count) | |
931 | return -EINVAL; | |
afefdbb2 | 932 | d_ino = ino; |
8f3f655d AV |
933 | if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) { |
934 | buf->error = -EOVERFLOW; | |
afefdbb2 | 935 | return -EOVERFLOW; |
8f3f655d | 936 | } |
1da177e4 LT |
937 | dirent = buf->previous; |
938 | if (dirent) { | |
939 | if (__put_user(offset, &dirent->d_off)) | |
940 | goto efault; | |
941 | } | |
942 | dirent = buf->current_dir; | |
afefdbb2 | 943 | if (__put_user(d_ino, &dirent->d_ino)) |
1da177e4 LT |
944 | goto efault; |
945 | if (__put_user(reclen, &dirent->d_reclen)) | |
946 | goto efault; | |
947 | if (copy_to_user(dirent->d_name, name, namlen)) | |
948 | goto efault; | |
949 | if (__put_user(0, dirent->d_name + namlen)) | |
950 | goto efault; | |
951 | if (__put_user(d_type, (char __user *) dirent + reclen - 1)) | |
952 | goto efault; | |
953 | buf->previous = dirent; | |
954 | dirent = (void __user *)dirent + reclen; | |
955 | buf->current_dir = dirent; | |
956 | buf->count -= reclen; | |
957 | return 0; | |
958 | efault: | |
959 | buf->error = -EFAULT; | |
960 | return -EFAULT; | |
961 | } | |
962 | ||
963 | asmlinkage long compat_sys_getdents(unsigned int fd, | |
964 | struct compat_linux_dirent __user *dirent, unsigned int count) | |
965 | { | |
966 | struct file * file; | |
967 | struct compat_linux_dirent __user * lastdirent; | |
968 | struct compat_getdents_callback buf; | |
969 | int error; | |
970 | ||
971 | error = -EFAULT; | |
972 | if (!access_ok(VERIFY_WRITE, dirent, count)) | |
973 | goto out; | |
974 | ||
975 | error = -EBADF; | |
976 | file = fget(fd); | |
977 | if (!file) | |
978 | goto out; | |
979 | ||
980 | buf.current_dir = dirent; | |
981 | buf.previous = NULL; | |
982 | buf.count = count; | |
983 | buf.error = 0; | |
984 | ||
985 | error = vfs_readdir(file, compat_filldir, &buf); | |
53c9c5c0 AV |
986 | if (error >= 0) |
987 | error = buf.error; | |
1da177e4 LT |
988 | lastdirent = buf.previous; |
989 | if (lastdirent) { | |
990 | if (put_user(file->f_pos, &lastdirent->d_off)) | |
991 | error = -EFAULT; | |
992 | else | |
993 | error = count - buf.count; | |
994 | } | |
1da177e4 LT |
995 | fput(file); |
996 | out: | |
997 | return error; | |
998 | } | |
999 | ||
1000 | #ifndef __ARCH_OMIT_COMPAT_SYS_GETDENTS64 | |
1da177e4 LT |
1001 | |
1002 | struct compat_getdents_callback64 { | |
1003 | struct linux_dirent64 __user *current_dir; | |
1004 | struct linux_dirent64 __user *previous; | |
1005 | int count; | |
1006 | int error; | |
1007 | }; | |
1008 | ||
1009 | static int compat_filldir64(void * __buf, const char * name, int namlen, loff_t offset, | |
afefdbb2 | 1010 | u64 ino, unsigned int d_type) |
1da177e4 LT |
1011 | { |
1012 | struct linux_dirent64 __user *dirent; | |
1013 | struct compat_getdents_callback64 *buf = __buf; | |
85c9fe8f KW |
1014 | int reclen = ALIGN(offsetof(struct linux_dirent64, d_name) + namlen + 1, |
1015 | sizeof(u64)); | |
1da177e4 LT |
1016 | u64 off; |
1017 | ||
1018 | buf->error = -EINVAL; /* only used if we fail.. */ | |
1019 | if (reclen > buf->count) | |
1020 | return -EINVAL; | |
1021 | dirent = buf->previous; | |
1022 | ||
1023 | if (dirent) { | |
1024 | if (__put_user_unaligned(offset, &dirent->d_off)) | |
1025 | goto efault; | |
1026 | } | |
1027 | dirent = buf->current_dir; | |
1028 | if (__put_user_unaligned(ino, &dirent->d_ino)) | |
1029 | goto efault; | |
1030 | off = 0; | |
1031 | if (__put_user_unaligned(off, &dirent->d_off)) | |
1032 | goto efault; | |
1033 | if (__put_user(reclen, &dirent->d_reclen)) | |
1034 | goto efault; | |
1035 | if (__put_user(d_type, &dirent->d_type)) | |
1036 | goto efault; | |
1037 | if (copy_to_user(dirent->d_name, name, namlen)) | |
1038 | goto efault; | |
1039 | if (__put_user(0, dirent->d_name + namlen)) | |
1040 | goto efault; | |
1041 | buf->previous = dirent; | |
1042 | dirent = (void __user *)dirent + reclen; | |
1043 | buf->current_dir = dirent; | |
1044 | buf->count -= reclen; | |
1045 | return 0; | |
1046 | efault: | |
1047 | buf->error = -EFAULT; | |
1048 | return -EFAULT; | |
1049 | } | |
1050 | ||
1051 | asmlinkage long compat_sys_getdents64(unsigned int fd, | |
1052 | struct linux_dirent64 __user * dirent, unsigned int count) | |
1053 | { | |
1054 | struct file * file; | |
1055 | struct linux_dirent64 __user * lastdirent; | |
1056 | struct compat_getdents_callback64 buf; | |
1057 | int error; | |
1058 | ||
1059 | error = -EFAULT; | |
1060 | if (!access_ok(VERIFY_WRITE, dirent, count)) | |
1061 | goto out; | |
1062 | ||
1063 | error = -EBADF; | |
1064 | file = fget(fd); | |
1065 | if (!file) | |
1066 | goto out; | |
1067 | ||
1068 | buf.current_dir = dirent; | |
1069 | buf.previous = NULL; | |
1070 | buf.count = count; | |
1071 | buf.error = 0; | |
1072 | ||
1073 | error = vfs_readdir(file, compat_filldir64, &buf); | |
53c9c5c0 AV |
1074 | if (error >= 0) |
1075 | error = buf.error; | |
1da177e4 LT |
1076 | lastdirent = buf.previous; |
1077 | if (lastdirent) { | |
1078 | typeof(lastdirent->d_off) d_off = file->f_pos; | |
7116e994 | 1079 | if (__put_user_unaligned(d_off, &lastdirent->d_off)) |
53c9c5c0 AV |
1080 | error = -EFAULT; |
1081 | else | |
1082 | error = count - buf.count; | |
1da177e4 | 1083 | } |
1da177e4 LT |
1084 | fput(file); |
1085 | out: | |
1086 | return error; | |
1087 | } | |
1088 | #endif /* ! __ARCH_OMIT_COMPAT_SYS_GETDENTS64 */ | |
1089 | ||
1090 | static ssize_t compat_do_readv_writev(int type, struct file *file, | |
1091 | const struct compat_iovec __user *uvector, | |
1092 | unsigned long nr_segs, loff_t *pos) | |
1093 | { | |
1da177e4 LT |
1094 | compat_ssize_t tot_len; |
1095 | struct iovec iovstack[UIO_FASTIOV]; | |
767b68e9 | 1096 | struct iovec *iov = iovstack; |
1da177e4 | 1097 | ssize_t ret; |
1da177e4 LT |
1098 | io_fn_t fn; |
1099 | iov_fn_t fnv; | |
1100 | ||
1da177e4 | 1101 | ret = -EINVAL; |
1da177e4 LT |
1102 | if (!file->f_op) |
1103 | goto out; | |
b8373363 | 1104 | |
1da177e4 LT |
1105 | ret = -EFAULT; |
1106 | if (!access_ok(VERIFY_READ, uvector, nr_segs*sizeof(*uvector))) | |
1107 | goto out; | |
1108 | ||
b8373363 JM |
1109 | tot_len = compat_rw_copy_check_uvector(type, uvector, nr_segs, |
1110 | UIO_FASTIOV, iovstack, &iov); | |
1da177e4 LT |
1111 | if (tot_len == 0) { |
1112 | ret = 0; | |
1113 | goto out; | |
1114 | } | |
1115 | ||
1116 | ret = rw_verify_area(type, file, pos, tot_len); | |
e28cc715 | 1117 | if (ret < 0) |
1da177e4 LT |
1118 | goto out; |
1119 | ||
1120 | fnv = NULL; | |
1121 | if (type == READ) { | |
1122 | fn = file->f_op->read; | |
ee0b3e67 | 1123 | fnv = file->f_op->aio_read; |
1da177e4 LT |
1124 | } else { |
1125 | fn = (io_fn_t)file->f_op->write; | |
ee0b3e67 | 1126 | fnv = file->f_op->aio_write; |
1da177e4 LT |
1127 | } |
1128 | ||
ee0b3e67 BP |
1129 | if (fnv) |
1130 | ret = do_sync_readv_writev(file, iov, nr_segs, tot_len, | |
1131 | pos, fnv); | |
1132 | else | |
1133 | ret = do_loop_readv_writev(file, iov, nr_segs, pos, fn); | |
1da177e4 | 1134 | |
1da177e4 LT |
1135 | out: |
1136 | if (iov != iovstack) | |
1137 | kfree(iov); | |
0eeca283 | 1138 | if ((ret + (type == READ)) > 0) { |
0eeca283 | 1139 | if (type == READ) |
2a12a9d7 | 1140 | fsnotify_access(file); |
0eeca283 | 1141 | else |
2a12a9d7 | 1142 | fsnotify_modify(file); |
0eeca283 | 1143 | } |
1da177e4 LT |
1144 | return ret; |
1145 | } | |
1146 | ||
dac12138 GH |
1147 | static size_t compat_readv(struct file *file, |
1148 | const struct compat_iovec __user *vec, | |
1149 | unsigned long vlen, loff_t *pos) | |
1da177e4 | 1150 | { |
1da177e4 LT |
1151 | ssize_t ret = -EBADF; |
1152 | ||
1da177e4 LT |
1153 | if (!(file->f_mode & FMODE_READ)) |
1154 | goto out; | |
1155 | ||
1156 | ret = -EINVAL; | |
ee0b3e67 | 1157 | if (!file->f_op || (!file->f_op->aio_read && !file->f_op->read)) |
1da177e4 LT |
1158 | goto out; |
1159 | ||
dac12138 | 1160 | ret = compat_do_readv_writev(READ, file, vec, vlen, pos); |
1da177e4 LT |
1161 | |
1162 | out: | |
ca8a5bd2 GH |
1163 | if (ret > 0) |
1164 | add_rchar(current, ret); | |
1165 | inc_syscr(current); | |
dac12138 GH |
1166 | return ret; |
1167 | } | |
1168 | ||
1169 | asmlinkage ssize_t | |
1170 | compat_sys_readv(unsigned long fd, const struct compat_iovec __user *vec, | |
1171 | unsigned long vlen) | |
1172 | { | |
1173 | struct file *file; | |
10c7db27 | 1174 | int fput_needed; |
dac12138 GH |
1175 | ssize_t ret; |
1176 | ||
10c7db27 | 1177 | file = fget_light(fd, &fput_needed); |
dac12138 GH |
1178 | if (!file) |
1179 | return -EBADF; | |
1180 | ret = compat_readv(file, vec, vlen, &file->f_pos); | |
10c7db27 | 1181 | fput_light(file, fput_needed); |
1da177e4 LT |
1182 | return ret; |
1183 | } | |
1184 | ||
f3554f4b GH |
1185 | asmlinkage ssize_t |
1186 | compat_sys_preadv(unsigned long fd, const struct compat_iovec __user *vec, | |
601cc11d | 1187 | unsigned long vlen, u32 pos_low, u32 pos_high) |
f3554f4b GH |
1188 | { |
1189 | loff_t pos = ((loff_t)pos_high << 32) | pos_low; | |
1190 | struct file *file; | |
10c7db27 | 1191 | int fput_needed; |
f3554f4b GH |
1192 | ssize_t ret; |
1193 | ||
1194 | if (pos < 0) | |
1195 | return -EINVAL; | |
10c7db27 | 1196 | file = fget_light(fd, &fput_needed); |
f3554f4b GH |
1197 | if (!file) |
1198 | return -EBADF; | |
586ce098 AV |
1199 | ret = -ESPIPE; |
1200 | if (file->f_mode & FMODE_PREAD) | |
1201 | ret = compat_readv(file, vec, vlen, &pos); | |
10c7db27 | 1202 | fput_light(file, fput_needed); |
f3554f4b GH |
1203 | return ret; |
1204 | } | |
1205 | ||
6949a631 GH |
1206 | static size_t compat_writev(struct file *file, |
1207 | const struct compat_iovec __user *vec, | |
1208 | unsigned long vlen, loff_t *pos) | |
1da177e4 | 1209 | { |
1da177e4 LT |
1210 | ssize_t ret = -EBADF; |
1211 | ||
1da177e4 LT |
1212 | if (!(file->f_mode & FMODE_WRITE)) |
1213 | goto out; | |
1214 | ||
1215 | ret = -EINVAL; | |
ee0b3e67 | 1216 | if (!file->f_op || (!file->f_op->aio_write && !file->f_op->write)) |
1da177e4 LT |
1217 | goto out; |
1218 | ||
6949a631 | 1219 | ret = compat_do_readv_writev(WRITE, file, vec, vlen, pos); |
1da177e4 LT |
1220 | |
1221 | out: | |
ca8a5bd2 GH |
1222 | if (ret > 0) |
1223 | add_wchar(current, ret); | |
1224 | inc_syscw(current); | |
6949a631 GH |
1225 | return ret; |
1226 | } | |
1227 | ||
1228 | asmlinkage ssize_t | |
1229 | compat_sys_writev(unsigned long fd, const struct compat_iovec __user *vec, | |
1230 | unsigned long vlen) | |
1231 | { | |
1232 | struct file *file; | |
10c7db27 | 1233 | int fput_needed; |
6949a631 GH |
1234 | ssize_t ret; |
1235 | ||
10c7db27 | 1236 | file = fget_light(fd, &fput_needed); |
6949a631 GH |
1237 | if (!file) |
1238 | return -EBADF; | |
1239 | ret = compat_writev(file, vec, vlen, &file->f_pos); | |
10c7db27 | 1240 | fput_light(file, fput_needed); |
1da177e4 LT |
1241 | return ret; |
1242 | } | |
1243 | ||
f3554f4b GH |
1244 | asmlinkage ssize_t |
1245 | compat_sys_pwritev(unsigned long fd, const struct compat_iovec __user *vec, | |
601cc11d | 1246 | unsigned long vlen, u32 pos_low, u32 pos_high) |
f3554f4b GH |
1247 | { |
1248 | loff_t pos = ((loff_t)pos_high << 32) | pos_low; | |
1249 | struct file *file; | |
10c7db27 | 1250 | int fput_needed; |
f3554f4b GH |
1251 | ssize_t ret; |
1252 | ||
1253 | if (pos < 0) | |
1254 | return -EINVAL; | |
10c7db27 | 1255 | file = fget_light(fd, &fput_needed); |
f3554f4b GH |
1256 | if (!file) |
1257 | return -EBADF; | |
586ce098 AV |
1258 | ret = -ESPIPE; |
1259 | if (file->f_mode & FMODE_PWRITE) | |
1260 | ret = compat_writev(file, vec, vlen, &pos); | |
10c7db27 | 1261 | fput_light(file, fput_needed); |
f3554f4b GH |
1262 | return ret; |
1263 | } | |
1264 | ||
d2610202 AK |
1265 | asmlinkage long |
1266 | compat_sys_vmsplice(int fd, const struct compat_iovec __user *iov32, | |
1267 | unsigned int nr_segs, unsigned int flags) | |
1268 | { | |
1269 | unsigned i; | |
90cbad65 | 1270 | struct iovec __user *iov; |
98232d50 | 1271 | if (nr_segs > UIO_MAXIOV) |
d2610202 AK |
1272 | return -EINVAL; |
1273 | iov = compat_alloc_user_space(nr_segs * sizeof(struct iovec)); | |
1274 | for (i = 0; i < nr_segs; i++) { | |
1275 | struct compat_iovec v; | |
1276 | if (get_user(v.iov_base, &iov32[i].iov_base) || | |
1277 | get_user(v.iov_len, &iov32[i].iov_len) || | |
1278 | put_user(compat_ptr(v.iov_base), &iov[i].iov_base) || | |
1279 | put_user(v.iov_len, &iov[i].iov_len)) | |
1280 | return -EFAULT; | |
1281 | } | |
1282 | return sys_vmsplice(fd, iov, nr_segs, flags); | |
1283 | } | |
1284 | ||
e922efc3 MS |
1285 | /* |
1286 | * Exactly like fs/open.c:sys_open(), except that it doesn't set the | |
1287 | * O_LARGEFILE flag. | |
1288 | */ | |
1289 | asmlinkage long | |
1290 | compat_sys_open(const char __user *filename, int flags, int mode) | |
1291 | { | |
5590ff0d UD |
1292 | return do_sys_open(AT_FDCWD, filename, flags, mode); |
1293 | } | |
1294 | ||
1295 | /* | |
1296 | * Exactly like fs/open.c:sys_openat(), except that it doesn't set the | |
1297 | * O_LARGEFILE flag. | |
1298 | */ | |
1299 | asmlinkage long | |
9ad11ab4 | 1300 | compat_sys_openat(unsigned int dfd, const char __user *filename, int flags, int mode) |
5590ff0d UD |
1301 | { |
1302 | return do_sys_open(dfd, filename, flags, mode); | |
e922efc3 MS |
1303 | } |
1304 | ||
1da177e4 LT |
1305 | #define __COMPAT_NFDBITS (8 * sizeof(compat_ulong_t)) |
1306 | ||
b773ad40 TG |
1307 | static int poll_select_copy_remaining(struct timespec *end_time, void __user *p, |
1308 | int timeval, int ret) | |
1309 | { | |
1310 | struct timespec ts; | |
1311 | ||
1312 | if (!p) | |
1313 | return ret; | |
1314 | ||
1315 | if (current->personality & STICKY_TIMEOUTS) | |
1316 | goto sticky; | |
1317 | ||
1318 | /* No update for zero timeout */ | |
1319 | if (!end_time->tv_sec && !end_time->tv_nsec) | |
1320 | return ret; | |
1321 | ||
1322 | ktime_get_ts(&ts); | |
1323 | ts = timespec_sub(*end_time, ts); | |
1324 | if (ts.tv_sec < 0) | |
1325 | ts.tv_sec = ts.tv_nsec = 0; | |
1326 | ||
1327 | if (timeval) { | |
1328 | struct compat_timeval rtv; | |
1329 | ||
1330 | rtv.tv_sec = ts.tv_sec; | |
1331 | rtv.tv_usec = ts.tv_nsec / NSEC_PER_USEC; | |
1332 | ||
1333 | if (!copy_to_user(p, &rtv, sizeof(rtv))) | |
1334 | return ret; | |
1335 | } else { | |
1336 | struct compat_timespec rts; | |
1337 | ||
1338 | rts.tv_sec = ts.tv_sec; | |
1339 | rts.tv_nsec = ts.tv_nsec; | |
1340 | ||
1341 | if (!copy_to_user(p, &rts, sizeof(rts))) | |
1342 | return ret; | |
1343 | } | |
1344 | /* | |
1345 | * If an application puts its timeval in read-only memory, we | |
1346 | * don't want the Linux-specific update to the timeval to | |
1347 | * cause a fault after the select has completed | |
1348 | * successfully. However, because we're not updating the | |
1349 | * timeval, we can't restart the system call. | |
1350 | */ | |
1351 | ||
1352 | sticky: | |
1353 | if (ret == -ERESTARTNOHAND) | |
1354 | ret = -EINTR; | |
1355 | return ret; | |
1356 | } | |
1357 | ||
1da177e4 LT |
1358 | /* |
1359 | * Ooo, nasty. We need here to frob 32-bit unsigned longs to | |
1360 | * 64-bit unsigned longs. | |
1361 | */ | |
858119e1 | 1362 | static |
1da177e4 LT |
1363 | int compat_get_fd_set(unsigned long nr, compat_ulong_t __user *ufdset, |
1364 | unsigned long *fdset) | |
1365 | { | |
022a1692 | 1366 | nr = DIV_ROUND_UP(nr, __COMPAT_NFDBITS); |
1da177e4 LT |
1367 | if (ufdset) { |
1368 | unsigned long odd; | |
1369 | ||
1370 | if (!access_ok(VERIFY_WRITE, ufdset, nr*sizeof(compat_ulong_t))) | |
1371 | return -EFAULT; | |
1372 | ||
1373 | odd = nr & 1UL; | |
1374 | nr &= ~1UL; | |
1375 | while (nr) { | |
1376 | unsigned long h, l; | |
7116e994 HC |
1377 | if (__get_user(l, ufdset) || __get_user(h, ufdset+1)) |
1378 | return -EFAULT; | |
1da177e4 LT |
1379 | ufdset += 2; |
1380 | *fdset++ = h << 32 | l; | |
1381 | nr -= 2; | |
1382 | } | |
7116e994 HC |
1383 | if (odd && __get_user(*fdset, ufdset)) |
1384 | return -EFAULT; | |
1da177e4 LT |
1385 | } else { |
1386 | /* Tricky, must clear full unsigned long in the | |
1387 | * kernel fdset at the end, this makes sure that | |
1388 | * actually happens. | |
1389 | */ | |
1390 | memset(fdset, 0, ((nr + 1) & ~1)*sizeof(compat_ulong_t)); | |
1391 | } | |
1392 | return 0; | |
1393 | } | |
1394 | ||
858119e1 | 1395 | static |
7116e994 HC |
1396 | int compat_set_fd_set(unsigned long nr, compat_ulong_t __user *ufdset, |
1397 | unsigned long *fdset) | |
1da177e4 LT |
1398 | { |
1399 | unsigned long odd; | |
022a1692 | 1400 | nr = DIV_ROUND_UP(nr, __COMPAT_NFDBITS); |
1da177e4 LT |
1401 | |
1402 | if (!ufdset) | |
7116e994 | 1403 | return 0; |
1da177e4 LT |
1404 | |
1405 | odd = nr & 1UL; | |
1406 | nr &= ~1UL; | |
1407 | while (nr) { | |
1408 | unsigned long h, l; | |
1409 | l = *fdset++; | |
1410 | h = l >> 32; | |
7116e994 HC |
1411 | if (__put_user(l, ufdset) || __put_user(h, ufdset+1)) |
1412 | return -EFAULT; | |
1da177e4 LT |
1413 | ufdset += 2; |
1414 | nr -= 2; | |
1415 | } | |
7116e994 HC |
1416 | if (odd && __put_user(*fdset, ufdset)) |
1417 | return -EFAULT; | |
1418 | return 0; | |
1da177e4 LT |
1419 | } |
1420 | ||
1421 | ||
1422 | /* | |
1423 | * This is a virtual copy of sys_select from fs/select.c and probably | |
1424 | * should be compared to it from time to time | |
1425 | */ | |
1da177e4 LT |
1426 | |
1427 | /* | |
1428 | * We can actually return ERESTARTSYS instead of EINTR, but I'd | |
1429 | * like to be certain this leads to no problems. So I return | |
1430 | * EINTR just for safety. | |
1431 | * | |
1432 | * Update: ERESTARTSYS breaks at least the xview clock binary, so | |
1433 | * I'm trying ERESTARTNOHAND which restart only when you want to. | |
1434 | */ | |
9f72949f | 1435 | int compat_core_sys_select(int n, compat_ulong_t __user *inp, |
8ff3e8e8 AV |
1436 | compat_ulong_t __user *outp, compat_ulong_t __user *exp, |
1437 | struct timespec *end_time) | |
1da177e4 LT |
1438 | { |
1439 | fd_set_bits fds; | |
6087b2da | 1440 | void *bits; |
bbea9f69 | 1441 | int size, max_fds, ret = -EINVAL; |
a4531edd | 1442 | struct fdtable *fdt; |
6087b2da | 1443 | long stack_fds[SELECT_STACK_ALLOC/sizeof(long)]; |
1da177e4 | 1444 | |
1da177e4 LT |
1445 | if (n < 0) |
1446 | goto out_nofds; | |
1447 | ||
bbea9f69 | 1448 | /* max_fds can increase, so grab it once to avoid race */ |
ac5b8b6f | 1449 | rcu_read_lock(); |
a4531edd | 1450 | fdt = files_fdtable(current->files); |
bbea9f69 | 1451 | max_fds = fdt->max_fds; |
ac5b8b6f | 1452 | rcu_read_unlock(); |
bbea9f69 VL |
1453 | if (n > max_fds) |
1454 | n = max_fds; | |
1da177e4 LT |
1455 | |
1456 | /* | |
1457 | * We need 6 bitmaps (in/out/ex for both incoming and outgoing), | |
1458 | * since we used fdset we need to allocate memory in units of | |
1459 | * long-words. | |
1460 | */ | |
1da177e4 | 1461 | size = FDS_BYTES(n); |
6087b2da BP |
1462 | bits = stack_fds; |
1463 | if (size > sizeof(stack_fds) / 6) { | |
1464 | bits = kmalloc(6 * size, GFP_KERNEL); | |
1465 | ret = -ENOMEM; | |
1466 | if (!bits) | |
1467 | goto out_nofds; | |
1468 | } | |
1da177e4 LT |
1469 | fds.in = (unsigned long *) bits; |
1470 | fds.out = (unsigned long *) (bits + size); | |
1471 | fds.ex = (unsigned long *) (bits + 2*size); | |
1472 | fds.res_in = (unsigned long *) (bits + 3*size); | |
1473 | fds.res_out = (unsigned long *) (bits + 4*size); | |
1474 | fds.res_ex = (unsigned long *) (bits + 5*size); | |
1475 | ||
1476 | if ((ret = compat_get_fd_set(n, inp, fds.in)) || | |
1477 | (ret = compat_get_fd_set(n, outp, fds.out)) || | |
1478 | (ret = compat_get_fd_set(n, exp, fds.ex))) | |
1479 | goto out; | |
1480 | zero_fd_set(n, fds.res_in); | |
1481 | zero_fd_set(n, fds.res_out); | |
1482 | zero_fd_set(n, fds.res_ex); | |
1483 | ||
8ff3e8e8 | 1484 | ret = do_select(n, &fds, end_time); |
1da177e4 LT |
1485 | |
1486 | if (ret < 0) | |
1487 | goto out; | |
1488 | if (!ret) { | |
1489 | ret = -ERESTARTNOHAND; | |
1490 | if (signal_pending(current)) | |
1491 | goto out; | |
1492 | ret = 0; | |
1493 | } | |
1494 | ||
7116e994 HC |
1495 | if (compat_set_fd_set(n, inp, fds.res_in) || |
1496 | compat_set_fd_set(n, outp, fds.res_out) || | |
1497 | compat_set_fd_set(n, exp, fds.res_ex)) | |
1498 | ret = -EFAULT; | |
1da177e4 | 1499 | out: |
6087b2da BP |
1500 | if (bits != stack_fds) |
1501 | kfree(bits); | |
1da177e4 LT |
1502 | out_nofds: |
1503 | return ret; | |
1504 | } | |
1505 | ||
9f72949f DW |
1506 | asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp, |
1507 | compat_ulong_t __user *outp, compat_ulong_t __user *exp, | |
1508 | struct compat_timeval __user *tvp) | |
1509 | { | |
8ff3e8e8 | 1510 | struct timespec end_time, *to = NULL; |
9f72949f DW |
1511 | struct compat_timeval tv; |
1512 | int ret; | |
1513 | ||
1514 | if (tvp) { | |
1515 | if (copy_from_user(&tv, tvp, sizeof(tv))) | |
1516 | return -EFAULT; | |
1517 | ||
8ff3e8e8 | 1518 | to = &end_time; |
4d36a9e6 AV |
1519 | if (poll_select_set_timeout(to, |
1520 | tv.tv_sec + (tv.tv_usec / USEC_PER_SEC), | |
1521 | (tv.tv_usec % USEC_PER_SEC) * NSEC_PER_USEC)) | |
9f72949f | 1522 | return -EINVAL; |
9f72949f DW |
1523 | } |
1524 | ||
8ff3e8e8 AV |
1525 | ret = compat_core_sys_select(n, inp, outp, exp, to); |
1526 | ret = poll_select_copy_remaining(&end_time, tvp, 1, ret); | |
9f72949f DW |
1527 | |
1528 | return ret; | |
1529 | } | |
1530 | ||
5d0e5283 CH |
1531 | struct compat_sel_arg_struct { |
1532 | compat_ulong_t n; | |
1533 | compat_uptr_t inp; | |
1534 | compat_uptr_t outp; | |
1535 | compat_uptr_t exp; | |
1536 | compat_uptr_t tvp; | |
1537 | }; | |
1538 | ||
1539 | asmlinkage long compat_sys_old_select(struct compat_sel_arg_struct __user *arg) | |
1540 | { | |
1541 | struct compat_sel_arg_struct a; | |
1542 | ||
1543 | if (copy_from_user(&a, arg, sizeof(a))) | |
1544 | return -EFAULT; | |
1545 | return compat_sys_select(a.n, compat_ptr(a.inp), compat_ptr(a.outp), | |
1546 | compat_ptr(a.exp), compat_ptr(a.tvp)); | |
1547 | } | |
1548 | ||
f3de272b | 1549 | #ifdef HAVE_SET_RESTORE_SIGMASK |
c9da9f21 | 1550 | static long do_compat_pselect(int n, compat_ulong_t __user *inp, |
9f72949f DW |
1551 | compat_ulong_t __user *outp, compat_ulong_t __user *exp, |
1552 | struct compat_timespec __user *tsp, compat_sigset_t __user *sigmask, | |
1553 | compat_size_t sigsetsize) | |
1554 | { | |
1555 | compat_sigset_t ss32; | |
1556 | sigset_t ksigmask, sigsaved; | |
9f72949f | 1557 | struct compat_timespec ts; |
8ff3e8e8 | 1558 | struct timespec end_time, *to = NULL; |
9f72949f DW |
1559 | int ret; |
1560 | ||
1561 | if (tsp) { | |
1562 | if (copy_from_user(&ts, tsp, sizeof(ts))) | |
1563 | return -EFAULT; | |
1564 | ||
8ff3e8e8 AV |
1565 | to = &end_time; |
1566 | if (poll_select_set_timeout(to, ts.tv_sec, ts.tv_nsec)) | |
9f72949f DW |
1567 | return -EINVAL; |
1568 | } | |
1569 | ||
1570 | if (sigmask) { | |
1571 | if (sigsetsize != sizeof(compat_sigset_t)) | |
1572 | return -EINVAL; | |
1573 | if (copy_from_user(&ss32, sigmask, sizeof(ss32))) | |
1574 | return -EFAULT; | |
1575 | sigset_from_compat(&ksigmask, &ss32); | |
1576 | ||
1577 | sigdelsetmask(&ksigmask, sigmask(SIGKILL)|sigmask(SIGSTOP)); | |
1578 | sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved); | |
1579 | } | |
1580 | ||
8ff3e8e8 AV |
1581 | ret = compat_core_sys_select(n, inp, outp, exp, to); |
1582 | ret = poll_select_copy_remaining(&end_time, tsp, 0, ret); | |
9f72949f DW |
1583 | |
1584 | if (ret == -ERESTARTNOHAND) { | |
1585 | /* | |
1586 | * Don't restore the signal mask yet. Let do_signal() deliver | |
1587 | * the signal on the way back to userspace, before the signal | |
1588 | * mask is restored. | |
1589 | */ | |
1590 | if (sigmask) { | |
1591 | memcpy(¤t->saved_sigmask, &sigsaved, | |
1592 | sizeof(sigsaved)); | |
4e4c22c7 | 1593 | set_restore_sigmask(); |
9f72949f DW |
1594 | } |
1595 | } else if (sigmask) | |
1596 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
1597 | ||
1598 | return ret; | |
1599 | } | |
1600 | ||
1601 | asmlinkage long compat_sys_pselect6(int n, compat_ulong_t __user *inp, | |
1602 | compat_ulong_t __user *outp, compat_ulong_t __user *exp, | |
1603 | struct compat_timespec __user *tsp, void __user *sig) | |
1604 | { | |
1605 | compat_size_t sigsetsize = 0; | |
1606 | compat_uptr_t up = 0; | |
1607 | ||
1608 | if (sig) { | |
1609 | if (!access_ok(VERIFY_READ, sig, | |
1610 | sizeof(compat_uptr_t)+sizeof(compat_size_t)) || | |
1611 | __get_user(up, (compat_uptr_t __user *)sig) || | |
1612 | __get_user(sigsetsize, | |
1613 | (compat_size_t __user *)(sig+sizeof(up)))) | |
1614 | return -EFAULT; | |
1615 | } | |
c9da9f21 HC |
1616 | return do_compat_pselect(n, inp, outp, exp, tsp, compat_ptr(up), |
1617 | sigsetsize); | |
9f72949f DW |
1618 | } |
1619 | ||
1620 | asmlinkage long compat_sys_ppoll(struct pollfd __user *ufds, | |
1621 | unsigned int nfds, struct compat_timespec __user *tsp, | |
1622 | const compat_sigset_t __user *sigmask, compat_size_t sigsetsize) | |
1623 | { | |
1624 | compat_sigset_t ss32; | |
1625 | sigset_t ksigmask, sigsaved; | |
1626 | struct compat_timespec ts; | |
8ff3e8e8 | 1627 | struct timespec end_time, *to = NULL; |
9f72949f DW |
1628 | int ret; |
1629 | ||
1630 | if (tsp) { | |
1631 | if (copy_from_user(&ts, tsp, sizeof(ts))) | |
1632 | return -EFAULT; | |
1633 | ||
8ff3e8e8 AV |
1634 | to = &end_time; |
1635 | if (poll_select_set_timeout(to, ts.tv_sec, ts.tv_nsec)) | |
1636 | return -EINVAL; | |
9f72949f DW |
1637 | } |
1638 | ||
1639 | if (sigmask) { | |
3835a9bd | 1640 | if (sigsetsize != sizeof(compat_sigset_t)) |
9f72949f DW |
1641 | return -EINVAL; |
1642 | if (copy_from_user(&ss32, sigmask, sizeof(ss32))) | |
1643 | return -EFAULT; | |
1644 | sigset_from_compat(&ksigmask, &ss32); | |
1645 | ||
1646 | sigdelsetmask(&ksigmask, sigmask(SIGKILL)|sigmask(SIGSTOP)); | |
1647 | sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved); | |
1648 | } | |
1649 | ||
8ff3e8e8 | 1650 | ret = do_sys_poll(ufds, nfds, to); |
9f72949f DW |
1651 | |
1652 | /* We can restart this syscall, usually */ | |
1653 | if (ret == -EINTR) { | |
1654 | /* | |
1655 | * Don't restore the signal mask yet. Let do_signal() deliver | |
1656 | * the signal on the way back to userspace, before the signal | |
1657 | * mask is restored. | |
1658 | */ | |
1659 | if (sigmask) { | |
1660 | memcpy(¤t->saved_sigmask, &sigsaved, | |
1661 | sizeof(sigsaved)); | |
4e4c22c7 | 1662 | set_restore_sigmask(); |
9f72949f DW |
1663 | } |
1664 | ret = -ERESTARTNOHAND; | |
1665 | } else if (sigmask) | |
1666 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
1667 | ||
8ff3e8e8 | 1668 | ret = poll_select_copy_remaining(&end_time, tsp, 0, ret); |
9f72949f DW |
1669 | |
1670 | return ret; | |
1671 | } | |
f3de272b | 1672 | #endif /* HAVE_SET_RESTORE_SIGMASK */ |
9f72949f | 1673 | |
f6dfb4fd DL |
1674 | #ifdef CONFIG_EPOLL |
1675 | ||
f3de272b | 1676 | #ifdef HAVE_SET_RESTORE_SIGMASK |
f6dfb4fd DL |
1677 | asmlinkage long compat_sys_epoll_pwait(int epfd, |
1678 | struct compat_epoll_event __user *events, | |
1679 | int maxevents, int timeout, | |
1680 | const compat_sigset_t __user *sigmask, | |
1681 | compat_size_t sigsetsize) | |
1682 | { | |
1683 | long err; | |
1684 | compat_sigset_t csigmask; | |
1685 | sigset_t ksigmask, sigsaved; | |
1686 | ||
1687 | /* | |
1688 | * If the caller wants a certain signal mask to be set during the wait, | |
1689 | * we apply it here. | |
1690 | */ | |
1691 | if (sigmask) { | |
1692 | if (sigsetsize != sizeof(compat_sigset_t)) | |
1693 | return -EINVAL; | |
1694 | if (copy_from_user(&csigmask, sigmask, sizeof(csigmask))) | |
1695 | return -EFAULT; | |
1696 | sigset_from_compat(&ksigmask, &csigmask); | |
1697 | sigdelsetmask(&ksigmask, sigmask(SIGKILL) | sigmask(SIGSTOP)); | |
1698 | sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved); | |
1699 | } | |
1700 | ||
f6dfb4fd | 1701 | err = sys_epoll_wait(epfd, events, maxevents, timeout); |
f6dfb4fd DL |
1702 | |
1703 | /* | |
1704 | * If we changed the signal mask, we need to restore the original one. | |
1705 | * In case we've got a signal while waiting, we do not restore the | |
1706 | * signal mask yet, and we allow do_signal() to deliver the signal on | |
1707 | * the way back to userspace, before the signal mask is restored. | |
1708 | */ | |
1709 | if (sigmask) { | |
1710 | if (err == -EINTR) { | |
1711 | memcpy(¤t->saved_sigmask, &sigsaved, | |
1712 | sizeof(sigsaved)); | |
4e4c22c7 | 1713 | set_restore_sigmask(); |
f6dfb4fd DL |
1714 | } else |
1715 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
1716 | } | |
1717 | ||
1718 | return err; | |
1719 | } | |
f3de272b | 1720 | #endif /* HAVE_SET_RESTORE_SIGMASK */ |
f6dfb4fd DL |
1721 | |
1722 | #endif /* CONFIG_EPOLL */ | |
6d18c922 DL |
1723 | |
1724 | #ifdef CONFIG_SIGNALFD | |
1725 | ||
9deb27ba UD |
1726 | asmlinkage long compat_sys_signalfd4(int ufd, |
1727 | const compat_sigset_t __user *sigmask, | |
1728 | compat_size_t sigsetsize, int flags) | |
6d18c922 DL |
1729 | { |
1730 | compat_sigset_t ss32; | |
1731 | sigset_t tmp; | |
1732 | sigset_t __user *ksigmask; | |
1733 | ||
1734 | if (sigsetsize != sizeof(compat_sigset_t)) | |
1735 | return -EINVAL; | |
1736 | if (copy_from_user(&ss32, sigmask, sizeof(ss32))) | |
1737 | return -EFAULT; | |
1738 | sigset_from_compat(&tmp, &ss32); | |
1739 | ksigmask = compat_alloc_user_space(sizeof(sigset_t)); | |
1740 | if (copy_to_user(ksigmask, &tmp, sizeof(sigset_t))) | |
1741 | return -EFAULT; | |
1742 | ||
9deb27ba | 1743 | return sys_signalfd4(ufd, ksigmask, sizeof(sigset_t), flags); |
6d18c922 DL |
1744 | } |
1745 | ||
9deb27ba UD |
1746 | asmlinkage long compat_sys_signalfd(int ufd, |
1747 | const compat_sigset_t __user *sigmask, | |
1748 | compat_size_t sigsetsize) | |
1749 | { | |
1750 | return compat_sys_signalfd4(ufd, sigmask, sigsetsize, 0); | |
1751 | } | |
6d18c922 DL |
1752 | #endif /* CONFIG_SIGNALFD */ |
1753 | ||
83f5d126 DL |
1754 | #ifdef CONFIG_TIMERFD |
1755 | ||
4d672e7a DL |
1756 | asmlinkage long compat_sys_timerfd_settime(int ufd, int flags, |
1757 | const struct compat_itimerspec __user *utmr, | |
1758 | struct compat_itimerspec __user *otmr) | |
83f5d126 | 1759 | { |
4d672e7a | 1760 | int error; |
83f5d126 DL |
1761 | struct itimerspec t; |
1762 | struct itimerspec __user *ut; | |
1763 | ||
83f5d126 | 1764 | if (get_compat_itimerspec(&t, utmr)) |
8317f14b | 1765 | return -EFAULT; |
4d672e7a DL |
1766 | ut = compat_alloc_user_space(2 * sizeof(struct itimerspec)); |
1767 | if (copy_to_user(&ut[0], &t, sizeof(t))) | |
8317f14b | 1768 | return -EFAULT; |
4d672e7a DL |
1769 | error = sys_timerfd_settime(ufd, flags, &ut[0], &ut[1]); |
1770 | if (!error && otmr) | |
1771 | error = (copy_from_user(&t, &ut[1], sizeof(struct itimerspec)) || | |
1772 | put_compat_itimerspec(otmr, &t)) ? -EFAULT: 0; | |
1773 | ||
1774 | return error; | |
1775 | } | |
1776 | ||
1777 | asmlinkage long compat_sys_timerfd_gettime(int ufd, | |
1778 | struct compat_itimerspec __user *otmr) | |
1779 | { | |
1780 | int error; | |
1781 | struct itimerspec t; | |
1782 | struct itimerspec __user *ut; | |
83f5d126 | 1783 | |
4d672e7a DL |
1784 | ut = compat_alloc_user_space(sizeof(struct itimerspec)); |
1785 | error = sys_timerfd_gettime(ufd, ut); | |
1786 | if (!error) | |
1787 | error = (copy_from_user(&t, ut, sizeof(struct itimerspec)) || | |
1788 | put_compat_itimerspec(otmr, &t)) ? -EFAULT: 0; | |
1789 | ||
1790 | return error; | |
83f5d126 DL |
1791 | } |
1792 | ||
1793 | #endif /* CONFIG_TIMERFD */ | |
becfd1f3 AK |
1794 | |
1795 | #ifdef CONFIG_FHANDLE | |
1796 | /* | |
1797 | * Exactly like fs/open.c:sys_open_by_handle_at(), except that it | |
1798 | * doesn't set the O_LARGEFILE flag. | |
1799 | */ | |
1800 | asmlinkage long | |
1801 | compat_sys_open_by_handle_at(int mountdirfd, | |
1802 | struct file_handle __user *handle, int flags) | |
1803 | { | |
1804 | return do_handle_open(mountdirfd, handle, flags); | |
1805 | } | |
1806 | #endif |